Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Intel Langwell USB Device Controller driver |
| 3 | * Copyright (C) 2008-2009, Intel Corporation. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms and conditions of the GNU General Public License, |
| 7 | * version 2, as published by the Free Software Foundation. |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | |
| 11 | /* #undef DEBUG */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 12 | /* #undef VERBOSE_DEBUG */ |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 13 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 14 | #include <linux/module.h> |
| 15 | #include <linux/pci.h> |
| 16 | #include <linux/dma-mapping.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/ioport.h> |
| 20 | #include <linux/sched.h> |
| 21 | #include <linux/slab.h> |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 22 | #include <linux/errno.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/timer.h> |
| 25 | #include <linux/list.h> |
| 26 | #include <linux/interrupt.h> |
| 27 | #include <linux/moduleparam.h> |
| 28 | #include <linux/device.h> |
| 29 | #include <linux/usb/ch9.h> |
| 30 | #include <linux/usb/gadget.h> |
| 31 | #include <linux/usb/otg.h> |
| 32 | #include <linux/pm.h> |
| 33 | #include <linux/io.h> |
| 34 | #include <linux/irq.h> |
| 35 | #include <asm/system.h> |
| 36 | #include <asm/unaligned.h> |
| 37 | |
| 38 | #include "langwell_udc.h" |
| 39 | |
| 40 | |
| 41 | #define DRIVER_DESC "Intel Langwell USB Device Controller driver" |
| 42 | #define DRIVER_VERSION "16 May 2009" |
| 43 | |
| 44 | static const char driver_name[] = "langwell_udc"; |
| 45 | static const char driver_desc[] = DRIVER_DESC; |
| 46 | |
| 47 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 48 | /* for endpoint 0 operations */ |
| 49 | static const struct usb_endpoint_descriptor |
| 50 | langwell_ep0_desc = { |
| 51 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 52 | .bDescriptorType = USB_DT_ENDPOINT, |
| 53 | .bEndpointAddress = 0, |
| 54 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, |
| 55 | .wMaxPacketSize = EP0_MAX_PKT_SIZE, |
| 56 | }; |
| 57 | |
| 58 | |
| 59 | /*-------------------------------------------------------------------------*/ |
| 60 | /* debugging */ |
| 61 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 62 | #ifdef VERBOSE_DEBUG |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 63 | static inline void print_all_registers(struct langwell_udc *dev) |
| 64 | { |
| 65 | int i; |
| 66 | |
| 67 | /* Capability Registers */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 68 | dev_dbg(&dev->pdev->dev, |
| 69 | "Capability Registers (offset: 0x%04x, length: 0x%08x)\n", |
| 70 | CAP_REG_OFFSET, (u32)sizeof(struct langwell_cap_regs)); |
| 71 | dev_dbg(&dev->pdev->dev, "caplength=0x%02x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 72 | readb(&dev->cap_regs->caplength)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 73 | dev_dbg(&dev->pdev->dev, "hciversion=0x%04x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 74 | readw(&dev->cap_regs->hciversion)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 75 | dev_dbg(&dev->pdev->dev, "hcsparams=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 76 | readl(&dev->cap_regs->hcsparams)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 77 | dev_dbg(&dev->pdev->dev, "hccparams=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 78 | readl(&dev->cap_regs->hccparams)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 79 | dev_dbg(&dev->pdev->dev, "dciversion=0x%04x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 80 | readw(&dev->cap_regs->dciversion)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 81 | dev_dbg(&dev->pdev->dev, "dccparams=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 82 | readl(&dev->cap_regs->dccparams)); |
| 83 | |
| 84 | /* Operational Registers */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 85 | dev_dbg(&dev->pdev->dev, |
| 86 | "Operational Registers (offset: 0x%04x, length: 0x%08x)\n", |
| 87 | OP_REG_OFFSET, (u32)sizeof(struct langwell_op_regs)); |
| 88 | dev_dbg(&dev->pdev->dev, "extsts=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 89 | readl(&dev->op_regs->extsts)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 90 | dev_dbg(&dev->pdev->dev, "extintr=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 91 | readl(&dev->op_regs->extintr)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 92 | dev_dbg(&dev->pdev->dev, "usbcmd=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 93 | readl(&dev->op_regs->usbcmd)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 94 | dev_dbg(&dev->pdev->dev, "usbsts=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 95 | readl(&dev->op_regs->usbsts)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 96 | dev_dbg(&dev->pdev->dev, "usbintr=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 97 | readl(&dev->op_regs->usbintr)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 98 | dev_dbg(&dev->pdev->dev, "frindex=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 99 | readl(&dev->op_regs->frindex)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 100 | dev_dbg(&dev->pdev->dev, "ctrldssegment=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 101 | readl(&dev->op_regs->ctrldssegment)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 102 | dev_dbg(&dev->pdev->dev, "deviceaddr=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 103 | readl(&dev->op_regs->deviceaddr)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 104 | dev_dbg(&dev->pdev->dev, "endpointlistaddr=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 105 | readl(&dev->op_regs->endpointlistaddr)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 106 | dev_dbg(&dev->pdev->dev, "ttctrl=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 107 | readl(&dev->op_regs->ttctrl)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 108 | dev_dbg(&dev->pdev->dev, "burstsize=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 109 | readl(&dev->op_regs->burstsize)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 110 | dev_dbg(&dev->pdev->dev, "txfilltuning=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 111 | readl(&dev->op_regs->txfilltuning)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 112 | dev_dbg(&dev->pdev->dev, "txttfilltuning=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 113 | readl(&dev->op_regs->txttfilltuning)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 114 | dev_dbg(&dev->pdev->dev, "ic_usb=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 115 | readl(&dev->op_regs->ic_usb)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 116 | dev_dbg(&dev->pdev->dev, "ulpi_viewport=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 117 | readl(&dev->op_regs->ulpi_viewport)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 118 | dev_dbg(&dev->pdev->dev, "configflag=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 119 | readl(&dev->op_regs->configflag)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 120 | dev_dbg(&dev->pdev->dev, "portsc1=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 121 | readl(&dev->op_regs->portsc1)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 122 | dev_dbg(&dev->pdev->dev, "devlc=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 123 | readl(&dev->op_regs->devlc)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 124 | dev_dbg(&dev->pdev->dev, "otgsc=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 125 | readl(&dev->op_regs->otgsc)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 126 | dev_dbg(&dev->pdev->dev, "usbmode=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 127 | readl(&dev->op_regs->usbmode)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 128 | dev_dbg(&dev->pdev->dev, "endptnak=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 129 | readl(&dev->op_regs->endptnak)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 130 | dev_dbg(&dev->pdev->dev, "endptnaken=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 131 | readl(&dev->op_regs->endptnaken)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 132 | dev_dbg(&dev->pdev->dev, "endptsetupstat=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 133 | readl(&dev->op_regs->endptsetupstat)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 134 | dev_dbg(&dev->pdev->dev, "endptprime=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 135 | readl(&dev->op_regs->endptprime)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 136 | dev_dbg(&dev->pdev->dev, "endptflush=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 137 | readl(&dev->op_regs->endptflush)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 138 | dev_dbg(&dev->pdev->dev, "endptstat=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 139 | readl(&dev->op_regs->endptstat)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 140 | dev_dbg(&dev->pdev->dev, "endptcomplete=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 141 | readl(&dev->op_regs->endptcomplete)); |
| 142 | |
| 143 | for (i = 0; i < dev->ep_max / 2; i++) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 144 | dev_dbg(&dev->pdev->dev, "endptctrl[%d]=0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 145 | i, readl(&dev->op_regs->endptctrl[i])); |
| 146 | } |
| 147 | } |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 148 | #else |
| 149 | |
| 150 | #define print_all_registers(dev) do { } while (0) |
| 151 | |
| 152 | #endif /* VERBOSE_DEBUG */ |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 153 | |
| 154 | |
| 155 | /*-------------------------------------------------------------------------*/ |
| 156 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 157 | #define is_in(ep) (((ep)->ep_num == 0) ? ((ep)->dev->ep0_dir == \ |
| 158 | USB_DIR_IN) : (usb_endpoint_dir_in((ep)->desc))) |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 159 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 160 | #define DIR_STRING(ep) (is_in(ep) ? "in" : "out") |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 161 | |
| 162 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 163 | static char *type_string(const struct usb_endpoint_descriptor *desc) |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 164 | { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 165 | switch (usb_endpoint_type(desc)) { |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 166 | case USB_ENDPOINT_XFER_BULK: |
| 167 | return "bulk"; |
| 168 | case USB_ENDPOINT_XFER_ISOC: |
| 169 | return "iso"; |
| 170 | case USB_ENDPOINT_XFER_INT: |
| 171 | return "int"; |
| 172 | }; |
| 173 | |
| 174 | return "control"; |
| 175 | } |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 176 | |
| 177 | |
| 178 | /* configure endpoint control registers */ |
| 179 | static void ep_reset(struct langwell_ep *ep, unsigned char ep_num, |
| 180 | unsigned char is_in, unsigned char ep_type) |
| 181 | { |
| 182 | struct langwell_udc *dev; |
| 183 | u32 endptctrl; |
| 184 | |
| 185 | dev = ep->dev; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 186 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 187 | |
| 188 | endptctrl = readl(&dev->op_regs->endptctrl[ep_num]); |
| 189 | if (is_in) { /* TX */ |
| 190 | if (ep_num) |
| 191 | endptctrl |= EPCTRL_TXR; |
| 192 | endptctrl |= EPCTRL_TXE; |
| 193 | endptctrl |= ep_type << EPCTRL_TXT_SHIFT; |
| 194 | } else { /* RX */ |
| 195 | if (ep_num) |
| 196 | endptctrl |= EPCTRL_RXR; |
| 197 | endptctrl |= EPCTRL_RXE; |
| 198 | endptctrl |= ep_type << EPCTRL_RXT_SHIFT; |
| 199 | } |
| 200 | |
| 201 | writel(endptctrl, &dev->op_regs->endptctrl[ep_num]); |
| 202 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 203 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | |
| 207 | /* reset ep0 dQH and endptctrl */ |
| 208 | static void ep0_reset(struct langwell_udc *dev) |
| 209 | { |
| 210 | struct langwell_ep *ep; |
| 211 | int i; |
| 212 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 213 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 214 | |
| 215 | /* ep0 in and out */ |
| 216 | for (i = 0; i < 2; i++) { |
| 217 | ep = &dev->ep[i]; |
| 218 | ep->dev = dev; |
| 219 | |
| 220 | /* ep0 dQH */ |
| 221 | ep->dqh = &dev->ep_dqh[i]; |
| 222 | |
| 223 | /* configure ep0 endpoint capabilities in dQH */ |
| 224 | ep->dqh->dqh_ios = 1; |
| 225 | ep->dqh->dqh_mpl = EP0_MAX_PKT_SIZE; |
| 226 | |
JiebingLi | 3eed298 | 2010-08-05 14:18:05 +0100 | [diff] [blame] | 227 | /* enable ep0-in HW zero length termination select */ |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 228 | if (is_in(ep)) |
| 229 | ep->dqh->dqh_zlt = 0; |
| 230 | ep->dqh->dqh_mult = 0; |
| 231 | |
JiebingLi | 3eed298 | 2010-08-05 14:18:05 +0100 | [diff] [blame] | 232 | ep->dqh->dtd_next = DTD_TERM; |
| 233 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 234 | /* configure ep0 control registers */ |
| 235 | ep_reset(&dev->ep[0], 0, i, USB_ENDPOINT_XFER_CONTROL); |
| 236 | } |
| 237 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 238 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | |
| 242 | /*-------------------------------------------------------------------------*/ |
| 243 | |
| 244 | /* endpoints operations */ |
| 245 | |
| 246 | /* configure endpoint, making it usable */ |
| 247 | static int langwell_ep_enable(struct usb_ep *_ep, |
| 248 | const struct usb_endpoint_descriptor *desc) |
| 249 | { |
| 250 | struct langwell_udc *dev; |
| 251 | struct langwell_ep *ep; |
| 252 | u16 max = 0; |
| 253 | unsigned long flags; |
JiebingLi | 3eed298 | 2010-08-05 14:18:05 +0100 | [diff] [blame] | 254 | int i, retval = 0; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 255 | unsigned char zlt, ios = 0, mult = 0; |
| 256 | |
| 257 | ep = container_of(_ep, struct langwell_ep, ep); |
| 258 | dev = ep->dev; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 259 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 260 | |
| 261 | if (!_ep || !desc || ep->desc |
| 262 | || desc->bDescriptorType != USB_DT_ENDPOINT) |
| 263 | return -EINVAL; |
| 264 | |
| 265 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) |
| 266 | return -ESHUTDOWN; |
| 267 | |
Kuninori Morimoto | 29cc889 | 2011-08-23 03:12:03 -0700 | [diff] [blame] | 268 | max = usb_endpoint_maxp(desc); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 269 | |
| 270 | /* |
| 271 | * disable HW zero length termination select |
| 272 | * driver handles zero length packet through req->req.zero |
| 273 | */ |
| 274 | zlt = 1; |
| 275 | |
| 276 | /* |
| 277 | * sanity check type, direction, address, and then |
| 278 | * initialize the endpoint capabilities fields in dQH |
| 279 | */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 280 | switch (usb_endpoint_type(desc)) { |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 281 | case USB_ENDPOINT_XFER_CONTROL: |
| 282 | ios = 1; |
| 283 | break; |
| 284 | case USB_ENDPOINT_XFER_BULK: |
| 285 | if ((dev->gadget.speed == USB_SPEED_HIGH |
| 286 | && max != 512) |
| 287 | || (dev->gadget.speed == USB_SPEED_FULL |
| 288 | && max > 64)) { |
| 289 | goto done; |
| 290 | } |
| 291 | break; |
| 292 | case USB_ENDPOINT_XFER_INT: |
| 293 | if (strstr(ep->ep.name, "-iso")) /* bulk is ok */ |
| 294 | goto done; |
| 295 | |
| 296 | switch (dev->gadget.speed) { |
| 297 | case USB_SPEED_HIGH: |
| 298 | if (max <= 1024) |
| 299 | break; |
| 300 | case USB_SPEED_FULL: |
| 301 | if (max <= 64) |
| 302 | break; |
| 303 | default: |
| 304 | if (max <= 8) |
| 305 | break; |
| 306 | goto done; |
| 307 | } |
| 308 | break; |
| 309 | case USB_ENDPOINT_XFER_ISOC: |
| 310 | if (strstr(ep->ep.name, "-bulk") |
| 311 | || strstr(ep->ep.name, "-int")) |
| 312 | goto done; |
| 313 | |
| 314 | switch (dev->gadget.speed) { |
| 315 | case USB_SPEED_HIGH: |
| 316 | if (max <= 1024) |
| 317 | break; |
| 318 | case USB_SPEED_FULL: |
| 319 | if (max <= 1023) |
| 320 | break; |
| 321 | default: |
| 322 | goto done; |
| 323 | } |
| 324 | /* |
| 325 | * FIXME: |
| 326 | * calculate transactions needed for high bandwidth iso |
| 327 | */ |
| 328 | mult = (unsigned char)(1 + ((max >> 11) & 0x03)); |
| 329 | max = max & 0x8ff; /* bit 0~10 */ |
| 330 | /* 3 transactions at most */ |
| 331 | if (mult > 3) |
| 332 | goto done; |
| 333 | break; |
| 334 | default: |
| 335 | goto done; |
| 336 | } |
| 337 | |
| 338 | spin_lock_irqsave(&dev->lock, flags); |
| 339 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 340 | ep->ep.maxpacket = max; |
| 341 | ep->desc = desc; |
| 342 | ep->stopped = 0; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 343 | ep->ep_num = usb_endpoint_num(desc); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 344 | |
| 345 | /* ep_type */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 346 | ep->ep_type = usb_endpoint_type(desc); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 347 | |
| 348 | /* configure endpoint control registers */ |
| 349 | ep_reset(ep, ep->ep_num, is_in(ep), ep->ep_type); |
| 350 | |
JiebingLi | 3eed298 | 2010-08-05 14:18:05 +0100 | [diff] [blame] | 351 | /* configure endpoint capabilities in dQH */ |
| 352 | i = ep->ep_num * 2 + is_in(ep); |
| 353 | ep->dqh = &dev->ep_dqh[i]; |
| 354 | ep->dqh->dqh_ios = ios; |
| 355 | ep->dqh->dqh_mpl = cpu_to_le16(max); |
| 356 | ep->dqh->dqh_zlt = zlt; |
| 357 | ep->dqh->dqh_mult = mult; |
| 358 | ep->dqh->dtd_next = DTD_TERM; |
| 359 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 360 | dev_dbg(&dev->pdev->dev, "enabled %s (ep%d%s-%s), max %04x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 361 | _ep->name, |
| 362 | ep->ep_num, |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 363 | DIR_STRING(ep), |
| 364 | type_string(desc), |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 365 | max); |
| 366 | |
| 367 | spin_unlock_irqrestore(&dev->lock, flags); |
| 368 | done: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 369 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 370 | return retval; |
| 371 | } |
| 372 | |
| 373 | |
| 374 | /*-------------------------------------------------------------------------*/ |
| 375 | |
| 376 | /* retire a request */ |
| 377 | static void done(struct langwell_ep *ep, struct langwell_request *req, |
| 378 | int status) |
| 379 | { |
| 380 | struct langwell_udc *dev = ep->dev; |
| 381 | unsigned stopped = ep->stopped; |
| 382 | struct langwell_dtd *curr_dtd, *next_dtd; |
| 383 | int i; |
| 384 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 385 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 386 | |
| 387 | /* remove the req from ep->queue */ |
| 388 | list_del_init(&req->queue); |
| 389 | |
| 390 | if (req->req.status == -EINPROGRESS) |
| 391 | req->req.status = status; |
| 392 | else |
| 393 | status = req->req.status; |
| 394 | |
| 395 | /* free dTD for the request */ |
| 396 | next_dtd = req->head; |
| 397 | for (i = 0; i < req->dtd_count; i++) { |
| 398 | curr_dtd = next_dtd; |
| 399 | if (i != req->dtd_count - 1) |
| 400 | next_dtd = curr_dtd->next_dtd_virt; |
| 401 | dma_pool_free(dev->dtd_pool, curr_dtd, curr_dtd->dtd_dma); |
| 402 | } |
| 403 | |
| 404 | if (req->mapped) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 405 | dma_unmap_single(&dev->pdev->dev, |
| 406 | req->req.dma, req->req.length, |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 407 | is_in(ep) ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); |
| 408 | req->req.dma = DMA_ADDR_INVALID; |
| 409 | req->mapped = 0; |
| 410 | } else |
| 411 | dma_sync_single_for_cpu(&dev->pdev->dev, req->req.dma, |
| 412 | req->req.length, |
| 413 | is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| 414 | |
| 415 | if (status != -ESHUTDOWN) |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 416 | dev_dbg(&dev->pdev->dev, |
| 417 | "complete %s, req %p, stat %d, len %u/%u\n", |
| 418 | ep->ep.name, &req->req, status, |
| 419 | req->req.actual, req->req.length); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 420 | |
| 421 | /* don't modify queue heads during completion callback */ |
| 422 | ep->stopped = 1; |
| 423 | |
| 424 | spin_unlock(&dev->lock); |
| 425 | /* complete routine from gadget driver */ |
| 426 | if (req->req.complete) |
| 427 | req->req.complete(&ep->ep, &req->req); |
| 428 | |
| 429 | spin_lock(&dev->lock); |
| 430 | ep->stopped = stopped; |
| 431 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 432 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 433 | } |
| 434 | |
| 435 | |
| 436 | static void langwell_ep_fifo_flush(struct usb_ep *_ep); |
| 437 | |
| 438 | /* delete all endpoint requests, called with spinlock held */ |
| 439 | static void nuke(struct langwell_ep *ep, int status) |
| 440 | { |
| 441 | /* called with spinlock held */ |
| 442 | ep->stopped = 1; |
| 443 | |
| 444 | /* endpoint fifo flush */ |
| 445 | if (&ep->ep && ep->desc) |
| 446 | langwell_ep_fifo_flush(&ep->ep); |
| 447 | |
| 448 | while (!list_empty(&ep->queue)) { |
| 449 | struct langwell_request *req = NULL; |
| 450 | req = list_entry(ep->queue.next, struct langwell_request, |
| 451 | queue); |
| 452 | done(ep, req, status); |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | |
| 457 | /*-------------------------------------------------------------------------*/ |
| 458 | |
| 459 | /* endpoint is no longer usable */ |
| 460 | static int langwell_ep_disable(struct usb_ep *_ep) |
| 461 | { |
| 462 | struct langwell_ep *ep; |
| 463 | unsigned long flags; |
| 464 | struct langwell_udc *dev; |
| 465 | int ep_num; |
| 466 | u32 endptctrl; |
| 467 | |
| 468 | ep = container_of(_ep, struct langwell_ep, ep); |
| 469 | dev = ep->dev; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 470 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 471 | |
| 472 | if (!_ep || !ep->desc) |
| 473 | return -EINVAL; |
| 474 | |
| 475 | spin_lock_irqsave(&dev->lock, flags); |
| 476 | |
| 477 | /* disable endpoint control register */ |
| 478 | ep_num = ep->ep_num; |
| 479 | endptctrl = readl(&dev->op_regs->endptctrl[ep_num]); |
| 480 | if (is_in(ep)) |
| 481 | endptctrl &= ~EPCTRL_TXE; |
| 482 | else |
| 483 | endptctrl &= ~EPCTRL_RXE; |
| 484 | writel(endptctrl, &dev->op_regs->endptctrl[ep_num]); |
| 485 | |
| 486 | /* nuke all pending requests (does flush) */ |
| 487 | nuke(ep, -ESHUTDOWN); |
| 488 | |
| 489 | ep->desc = NULL; |
| 490 | ep->stopped = 1; |
| 491 | |
| 492 | spin_unlock_irqrestore(&dev->lock, flags); |
| 493 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 494 | dev_dbg(&dev->pdev->dev, "disabled %s\n", _ep->name); |
| 495 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 496 | |
| 497 | return 0; |
| 498 | } |
| 499 | |
| 500 | |
| 501 | /* allocate a request object to use with this endpoint */ |
| 502 | static struct usb_request *langwell_alloc_request(struct usb_ep *_ep, |
| 503 | gfp_t gfp_flags) |
| 504 | { |
| 505 | struct langwell_ep *ep; |
| 506 | struct langwell_udc *dev; |
| 507 | struct langwell_request *req = NULL; |
| 508 | |
| 509 | if (!_ep) |
| 510 | return NULL; |
| 511 | |
| 512 | ep = container_of(_ep, struct langwell_ep, ep); |
| 513 | dev = ep->dev; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 514 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 515 | |
| 516 | req = kzalloc(sizeof(*req), gfp_flags); |
| 517 | if (!req) |
| 518 | return NULL; |
| 519 | |
| 520 | req->req.dma = DMA_ADDR_INVALID; |
| 521 | INIT_LIST_HEAD(&req->queue); |
| 522 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 523 | dev_vdbg(&dev->pdev->dev, "alloc request for %s\n", _ep->name); |
| 524 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 525 | return &req->req; |
| 526 | } |
| 527 | |
| 528 | |
| 529 | /* free a request object */ |
| 530 | static void langwell_free_request(struct usb_ep *_ep, |
| 531 | struct usb_request *_req) |
| 532 | { |
| 533 | struct langwell_ep *ep; |
| 534 | struct langwell_udc *dev; |
| 535 | struct langwell_request *req = NULL; |
| 536 | |
| 537 | ep = container_of(_ep, struct langwell_ep, ep); |
| 538 | dev = ep->dev; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 539 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 540 | |
| 541 | if (!_ep || !_req) |
| 542 | return; |
| 543 | |
| 544 | req = container_of(_req, struct langwell_request, req); |
| 545 | WARN_ON(!list_empty(&req->queue)); |
| 546 | |
| 547 | if (_req) |
| 548 | kfree(req); |
| 549 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 550 | dev_vdbg(&dev->pdev->dev, "free request for %s\n", _ep->name); |
| 551 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 552 | } |
| 553 | |
| 554 | |
| 555 | /*-------------------------------------------------------------------------*/ |
| 556 | |
| 557 | /* queue dTD and PRIME endpoint */ |
| 558 | static int queue_dtd(struct langwell_ep *ep, struct langwell_request *req) |
| 559 | { |
| 560 | u32 bit_mask, usbcmd, endptstat, dtd_dma; |
| 561 | u8 dtd_status; |
| 562 | int i; |
| 563 | struct langwell_dqh *dqh; |
| 564 | struct langwell_udc *dev; |
| 565 | |
| 566 | dev = ep->dev; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 567 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 568 | |
| 569 | i = ep->ep_num * 2 + is_in(ep); |
| 570 | dqh = &dev->ep_dqh[i]; |
| 571 | |
| 572 | if (ep->ep_num) |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 573 | dev_vdbg(&dev->pdev->dev, "%s\n", ep->name); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 574 | else |
| 575 | /* ep0 */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 576 | dev_vdbg(&dev->pdev->dev, "%s-%s\n", ep->name, DIR_STRING(ep)); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 577 | |
Felipe Balbi | b9af9ea | 2011-07-04 11:12:32 +0300 | [diff] [blame] | 578 | dev_vdbg(&dev->pdev->dev, "ep_dqh[%d] addr: 0x%p\n", |
| 579 | i, &(dev->ep_dqh[i])); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 580 | |
| 581 | bit_mask = is_in(ep) ? |
| 582 | (1 << (ep->ep_num + 16)) : (1 << (ep->ep_num)); |
| 583 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 584 | dev_vdbg(&dev->pdev->dev, "bit_mask = 0x%08x\n", bit_mask); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 585 | |
| 586 | /* check if the pipe is empty */ |
| 587 | if (!(list_empty(&ep->queue))) { |
| 588 | /* add dTD to the end of linked list */ |
| 589 | struct langwell_request *lastreq; |
| 590 | lastreq = list_entry(ep->queue.prev, |
| 591 | struct langwell_request, queue); |
| 592 | |
| 593 | lastreq->tail->dtd_next = |
| 594 | cpu_to_le32(req->head->dtd_dma & DTD_NEXT_MASK); |
| 595 | |
| 596 | /* read prime bit, if 1 goto out */ |
| 597 | if (readl(&dev->op_regs->endptprime) & bit_mask) |
| 598 | goto out; |
| 599 | |
| 600 | do { |
| 601 | /* set ATDTW bit in USBCMD */ |
| 602 | usbcmd = readl(&dev->op_regs->usbcmd); |
| 603 | writel(usbcmd | CMD_ATDTW, &dev->op_regs->usbcmd); |
| 604 | |
| 605 | /* read correct status bit */ |
| 606 | endptstat = readl(&dev->op_regs->endptstat) & bit_mask; |
| 607 | |
| 608 | } while (!(readl(&dev->op_regs->usbcmd) & CMD_ATDTW)); |
| 609 | |
| 610 | /* write ATDTW bit to 0 */ |
| 611 | usbcmd = readl(&dev->op_regs->usbcmd); |
| 612 | writel(usbcmd & ~CMD_ATDTW, &dev->op_regs->usbcmd); |
| 613 | |
| 614 | if (endptstat) |
| 615 | goto out; |
| 616 | } |
| 617 | |
| 618 | /* write dQH next pointer and terminate bit to 0 */ |
| 619 | dtd_dma = req->head->dtd_dma & DTD_NEXT_MASK; |
| 620 | dqh->dtd_next = cpu_to_le32(dtd_dma); |
| 621 | |
| 622 | /* clear active and halt bit */ |
| 623 | dtd_status = (u8) ~(DTD_STS_ACTIVE | DTD_STS_HALTED); |
| 624 | dqh->dtd_status &= dtd_status; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 625 | dev_vdbg(&dev->pdev->dev, "dqh->dtd_status = 0x%x\n", dqh->dtd_status); |
| 626 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 627 | /* ensure that updates to the dQH will occur before priming */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 628 | wmb(); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 629 | |
| 630 | /* write 1 to endptprime register to PRIME endpoint */ |
| 631 | bit_mask = is_in(ep) ? (1 << (ep->ep_num + 16)) : (1 << ep->ep_num); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 632 | dev_vdbg(&dev->pdev->dev, "endprime bit_mask = 0x%08x\n", bit_mask); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 633 | writel(bit_mask, &dev->op_regs->endptprime); |
| 634 | out: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 635 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 636 | return 0; |
| 637 | } |
| 638 | |
| 639 | |
| 640 | /* fill in the dTD structure to build a transfer descriptor */ |
| 641 | static struct langwell_dtd *build_dtd(struct langwell_request *req, |
| 642 | unsigned *length, dma_addr_t *dma, int *is_last) |
| 643 | { |
| 644 | u32 buf_ptr; |
| 645 | struct langwell_dtd *dtd; |
| 646 | struct langwell_udc *dev; |
| 647 | int i; |
| 648 | |
| 649 | dev = req->ep->dev; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 650 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 651 | |
| 652 | /* the maximum transfer length, up to 16k bytes */ |
| 653 | *length = min(req->req.length - req->req.actual, |
| 654 | (unsigned)DTD_MAX_TRANSFER_LENGTH); |
| 655 | |
| 656 | /* create dTD dma_pool resource */ |
| 657 | dtd = dma_pool_alloc(dev->dtd_pool, GFP_KERNEL, dma); |
| 658 | if (dtd == NULL) |
| 659 | return dtd; |
| 660 | dtd->dtd_dma = *dma; |
| 661 | |
| 662 | /* initialize buffer page pointers */ |
| 663 | buf_ptr = (u32)(req->req.dma + req->req.actual); |
| 664 | for (i = 0; i < 5; i++) |
| 665 | dtd->dtd_buf[i] = cpu_to_le32(buf_ptr + i * PAGE_SIZE); |
| 666 | |
| 667 | req->req.actual += *length; |
| 668 | |
| 669 | /* fill in total bytes with transfer size */ |
| 670 | dtd->dtd_total = cpu_to_le16(*length); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 671 | dev_vdbg(&dev->pdev->dev, "dtd->dtd_total = %d\n", dtd->dtd_total); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 672 | |
| 673 | /* set is_last flag if req->req.zero is set or not */ |
| 674 | if (req->req.zero) { |
| 675 | if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0) |
| 676 | *is_last = 1; |
| 677 | else |
| 678 | *is_last = 0; |
| 679 | } else if (req->req.length == req->req.actual) { |
| 680 | *is_last = 1; |
| 681 | } else |
| 682 | *is_last = 0; |
| 683 | |
| 684 | if (*is_last == 0) |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 685 | dev_vdbg(&dev->pdev->dev, "multi-dtd request!\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 686 | |
| 687 | /* set interrupt on complete bit for the last dTD */ |
| 688 | if (*is_last && !req->req.no_interrupt) |
| 689 | dtd->dtd_ioc = 1; |
| 690 | |
| 691 | /* set multiplier override 0 for non-ISO and non-TX endpoint */ |
| 692 | dtd->dtd_multo = 0; |
| 693 | |
| 694 | /* set the active bit of status field to 1 */ |
| 695 | dtd->dtd_status = DTD_STS_ACTIVE; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 696 | dev_vdbg(&dev->pdev->dev, "dtd->dtd_status = 0x%02x\n", |
| 697 | dtd->dtd_status); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 698 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 699 | dev_vdbg(&dev->pdev->dev, "length = %d, dma addr= 0x%08x\n", |
| 700 | *length, (int)*dma); |
| 701 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 702 | return dtd; |
| 703 | } |
| 704 | |
| 705 | |
| 706 | /* generate dTD linked list for a request */ |
| 707 | static int req_to_dtd(struct langwell_request *req) |
| 708 | { |
| 709 | unsigned count; |
| 710 | int is_last, is_first = 1; |
| 711 | struct langwell_dtd *dtd, *last_dtd = NULL; |
| 712 | struct langwell_udc *dev; |
| 713 | dma_addr_t dma; |
| 714 | |
| 715 | dev = req->ep->dev; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 716 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 717 | do { |
| 718 | dtd = build_dtd(req, &count, &dma, &is_last); |
| 719 | if (dtd == NULL) |
| 720 | return -ENOMEM; |
| 721 | |
| 722 | if (is_first) { |
| 723 | is_first = 0; |
| 724 | req->head = dtd; |
| 725 | } else { |
| 726 | last_dtd->dtd_next = cpu_to_le32(dma); |
| 727 | last_dtd->next_dtd_virt = dtd; |
| 728 | } |
| 729 | last_dtd = dtd; |
| 730 | req->dtd_count++; |
| 731 | } while (!is_last); |
| 732 | |
| 733 | /* set terminate bit to 1 for the last dTD */ |
| 734 | dtd->dtd_next = DTD_TERM; |
| 735 | |
| 736 | req->tail = dtd; |
| 737 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 738 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 739 | return 0; |
| 740 | } |
| 741 | |
| 742 | /*-------------------------------------------------------------------------*/ |
| 743 | |
| 744 | /* queue (submits) an I/O requests to an endpoint */ |
| 745 | static int langwell_ep_queue(struct usb_ep *_ep, struct usb_request *_req, |
| 746 | gfp_t gfp_flags) |
| 747 | { |
| 748 | struct langwell_request *req; |
| 749 | struct langwell_ep *ep; |
| 750 | struct langwell_udc *dev; |
| 751 | unsigned long flags; |
| 752 | int is_iso = 0, zlflag = 0; |
| 753 | |
| 754 | /* always require a cpu-view buffer */ |
| 755 | req = container_of(_req, struct langwell_request, req); |
| 756 | ep = container_of(_ep, struct langwell_ep, ep); |
| 757 | |
| 758 | if (!_req || !_req->complete || !_req->buf |
| 759 | || !list_empty(&req->queue)) { |
| 760 | return -EINVAL; |
| 761 | } |
| 762 | |
| 763 | if (unlikely(!_ep || !ep->desc)) |
| 764 | return -EINVAL; |
| 765 | |
| 766 | dev = ep->dev; |
| 767 | req->ep = ep; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 768 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 769 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 770 | if (usb_endpoint_xfer_isoc(ep->desc)) { |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 771 | if (req->req.length > ep->ep.maxpacket) |
| 772 | return -EMSGSIZE; |
| 773 | is_iso = 1; |
| 774 | } |
| 775 | |
| 776 | if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) |
| 777 | return -ESHUTDOWN; |
| 778 | |
| 779 | /* set up dma mapping in case the caller didn't */ |
| 780 | if (_req->dma == DMA_ADDR_INVALID) { |
| 781 | /* WORKAROUND: WARN_ON(size == 0) */ |
| 782 | if (_req->length == 0) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 783 | dev_vdbg(&dev->pdev->dev, "req->length: 0->1\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 784 | zlflag = 1; |
| 785 | _req->length++; |
| 786 | } |
| 787 | |
| 788 | _req->dma = dma_map_single(&dev->pdev->dev, |
| 789 | _req->buf, _req->length, |
| 790 | is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| 791 | if (zlflag && (_req->length == 1)) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 792 | dev_vdbg(&dev->pdev->dev, "req->length: 1->0\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 793 | zlflag = 0; |
| 794 | _req->length = 0; |
| 795 | } |
| 796 | |
| 797 | req->mapped = 1; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 798 | dev_vdbg(&dev->pdev->dev, "req->mapped = 1\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 799 | } else { |
| 800 | dma_sync_single_for_device(&dev->pdev->dev, |
| 801 | _req->dma, _req->length, |
| 802 | is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
| 803 | req->mapped = 0; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 804 | dev_vdbg(&dev->pdev->dev, "req->mapped = 0\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 805 | } |
| 806 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 807 | dev_dbg(&dev->pdev->dev, |
| 808 | "%s queue req %p, len %u, buf %p, dma 0x%08x\n", |
| 809 | _ep->name, |
| 810 | _req, _req->length, _req->buf, (int)_req->dma); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 811 | |
| 812 | _req->status = -EINPROGRESS; |
| 813 | _req->actual = 0; |
| 814 | req->dtd_count = 0; |
| 815 | |
| 816 | spin_lock_irqsave(&dev->lock, flags); |
| 817 | |
| 818 | /* build and put dTDs to endpoint queue */ |
| 819 | if (!req_to_dtd(req)) { |
| 820 | queue_dtd(ep, req); |
| 821 | } else { |
| 822 | spin_unlock_irqrestore(&dev->lock, flags); |
| 823 | return -ENOMEM; |
| 824 | } |
| 825 | |
| 826 | /* update ep0 state */ |
| 827 | if (ep->ep_num == 0) |
| 828 | dev->ep0_state = DATA_STATE_XMIT; |
| 829 | |
| 830 | if (likely(req != NULL)) { |
| 831 | list_add_tail(&req->queue, &ep->queue); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 832 | dev_vdbg(&dev->pdev->dev, "list_add_tail()\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 833 | } |
| 834 | |
| 835 | spin_unlock_irqrestore(&dev->lock, flags); |
| 836 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 837 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 838 | return 0; |
| 839 | } |
| 840 | |
| 841 | |
| 842 | /* dequeue (cancels, unlinks) an I/O request from an endpoint */ |
| 843 | static int langwell_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| 844 | { |
| 845 | struct langwell_ep *ep; |
| 846 | struct langwell_udc *dev; |
| 847 | struct langwell_request *req; |
| 848 | unsigned long flags; |
| 849 | int stopped, ep_num, retval = 0; |
| 850 | u32 endptctrl; |
| 851 | |
| 852 | ep = container_of(_ep, struct langwell_ep, ep); |
| 853 | dev = ep->dev; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 854 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 855 | |
| 856 | if (!_ep || !ep->desc || !_req) |
| 857 | return -EINVAL; |
| 858 | |
| 859 | if (!dev->driver) |
| 860 | return -ESHUTDOWN; |
| 861 | |
| 862 | spin_lock_irqsave(&dev->lock, flags); |
| 863 | stopped = ep->stopped; |
| 864 | |
| 865 | /* quiesce dma while we patch the queue */ |
| 866 | ep->stopped = 1; |
| 867 | ep_num = ep->ep_num; |
| 868 | |
| 869 | /* disable endpoint control register */ |
| 870 | endptctrl = readl(&dev->op_regs->endptctrl[ep_num]); |
| 871 | if (is_in(ep)) |
| 872 | endptctrl &= ~EPCTRL_TXE; |
| 873 | else |
| 874 | endptctrl &= ~EPCTRL_RXE; |
| 875 | writel(endptctrl, &dev->op_regs->endptctrl[ep_num]); |
| 876 | |
| 877 | /* make sure it's still queued on this endpoint */ |
| 878 | list_for_each_entry(req, &ep->queue, queue) { |
| 879 | if (&req->req == _req) |
| 880 | break; |
| 881 | } |
| 882 | |
| 883 | if (&req->req != _req) { |
| 884 | retval = -EINVAL; |
| 885 | goto done; |
| 886 | } |
| 887 | |
| 888 | /* queue head may be partially complete. */ |
| 889 | if (ep->queue.next == &req->queue) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 890 | dev_dbg(&dev->pdev->dev, "unlink (%s) dma\n", _ep->name); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 891 | _req->status = -ECONNRESET; |
| 892 | langwell_ep_fifo_flush(&ep->ep); |
| 893 | |
| 894 | /* not the last request in endpoint queue */ |
| 895 | if (likely(ep->queue.next == &req->queue)) { |
| 896 | struct langwell_dqh *dqh; |
| 897 | struct langwell_request *next_req; |
| 898 | |
| 899 | dqh = ep->dqh; |
| 900 | next_req = list_entry(req->queue.next, |
| 901 | struct langwell_request, queue); |
| 902 | |
| 903 | /* point the dQH to the first dTD of next request */ |
| 904 | writel((u32) next_req->head, &dqh->dqh_current); |
| 905 | } |
| 906 | } else { |
| 907 | struct langwell_request *prev_req; |
| 908 | |
| 909 | prev_req = list_entry(req->queue.prev, |
| 910 | struct langwell_request, queue); |
| 911 | writel(readl(&req->tail->dtd_next), |
| 912 | &prev_req->tail->dtd_next); |
| 913 | } |
| 914 | |
| 915 | done(ep, req, -ECONNRESET); |
| 916 | |
| 917 | done: |
| 918 | /* enable endpoint again */ |
| 919 | endptctrl = readl(&dev->op_regs->endptctrl[ep_num]); |
| 920 | if (is_in(ep)) |
| 921 | endptctrl |= EPCTRL_TXE; |
| 922 | else |
| 923 | endptctrl |= EPCTRL_RXE; |
| 924 | writel(endptctrl, &dev->op_regs->endptctrl[ep_num]); |
| 925 | |
| 926 | ep->stopped = stopped; |
| 927 | spin_unlock_irqrestore(&dev->lock, flags); |
| 928 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 929 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 930 | return retval; |
| 931 | } |
| 932 | |
| 933 | |
| 934 | /*-------------------------------------------------------------------------*/ |
| 935 | |
| 936 | /* endpoint set/clear halt */ |
| 937 | static void ep_set_halt(struct langwell_ep *ep, int value) |
| 938 | { |
| 939 | u32 endptctrl = 0; |
| 940 | int ep_num; |
| 941 | struct langwell_udc *dev = ep->dev; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 942 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 943 | |
| 944 | ep_num = ep->ep_num; |
| 945 | endptctrl = readl(&dev->op_regs->endptctrl[ep_num]); |
| 946 | |
| 947 | /* value: 1 - set halt, 0 - clear halt */ |
| 948 | if (value) { |
| 949 | /* set the stall bit */ |
| 950 | if (is_in(ep)) |
| 951 | endptctrl |= EPCTRL_TXS; |
| 952 | else |
| 953 | endptctrl |= EPCTRL_RXS; |
| 954 | } else { |
| 955 | /* clear the stall bit and reset data toggle */ |
| 956 | if (is_in(ep)) { |
| 957 | endptctrl &= ~EPCTRL_TXS; |
| 958 | endptctrl |= EPCTRL_TXR; |
| 959 | } else { |
| 960 | endptctrl &= ~EPCTRL_RXS; |
| 961 | endptctrl |= EPCTRL_RXR; |
| 962 | } |
| 963 | } |
| 964 | |
| 965 | writel(endptctrl, &dev->op_regs->endptctrl[ep_num]); |
| 966 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 967 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 968 | } |
| 969 | |
| 970 | |
| 971 | /* set the endpoint halt feature */ |
| 972 | static int langwell_ep_set_halt(struct usb_ep *_ep, int value) |
| 973 | { |
| 974 | struct langwell_ep *ep; |
| 975 | struct langwell_udc *dev; |
| 976 | unsigned long flags; |
| 977 | int retval = 0; |
| 978 | |
| 979 | ep = container_of(_ep, struct langwell_ep, ep); |
| 980 | dev = ep->dev; |
| 981 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 982 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 983 | |
| 984 | if (!_ep || !ep->desc) |
| 985 | return -EINVAL; |
| 986 | |
| 987 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) |
| 988 | return -ESHUTDOWN; |
| 989 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 990 | if (usb_endpoint_xfer_isoc(ep->desc)) |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 991 | return -EOPNOTSUPP; |
| 992 | |
| 993 | spin_lock_irqsave(&dev->lock, flags); |
| 994 | |
| 995 | /* |
| 996 | * attempt to halt IN ep will fail if any transfer requests |
| 997 | * are still queue |
| 998 | */ |
| 999 | if (!list_empty(&ep->queue) && is_in(ep) && value) { |
| 1000 | /* IN endpoint FIFO holds bytes */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1001 | dev_dbg(&dev->pdev->dev, "%s FIFO holds bytes\n", _ep->name); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1002 | retval = -EAGAIN; |
| 1003 | goto done; |
| 1004 | } |
| 1005 | |
| 1006 | /* endpoint set/clear halt */ |
| 1007 | if (ep->ep_num) { |
| 1008 | ep_set_halt(ep, value); |
| 1009 | } else { /* endpoint 0 */ |
| 1010 | dev->ep0_state = WAIT_FOR_SETUP; |
| 1011 | dev->ep0_dir = USB_DIR_OUT; |
| 1012 | } |
| 1013 | done: |
| 1014 | spin_unlock_irqrestore(&dev->lock, flags); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1015 | dev_dbg(&dev->pdev->dev, "%s %s halt\n", |
| 1016 | _ep->name, value ? "set" : "clear"); |
| 1017 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1018 | return retval; |
| 1019 | } |
| 1020 | |
| 1021 | |
| 1022 | /* set the halt feature and ignores clear requests */ |
| 1023 | static int langwell_ep_set_wedge(struct usb_ep *_ep) |
| 1024 | { |
| 1025 | struct langwell_ep *ep; |
| 1026 | struct langwell_udc *dev; |
| 1027 | |
| 1028 | ep = container_of(_ep, struct langwell_ep, ep); |
| 1029 | dev = ep->dev; |
| 1030 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1031 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1032 | |
| 1033 | if (!_ep || !ep->desc) |
| 1034 | return -EINVAL; |
| 1035 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1036 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1037 | return usb_ep_set_halt(_ep); |
| 1038 | } |
| 1039 | |
| 1040 | |
| 1041 | /* flush contents of a fifo */ |
| 1042 | static void langwell_ep_fifo_flush(struct usb_ep *_ep) |
| 1043 | { |
| 1044 | struct langwell_ep *ep; |
| 1045 | struct langwell_udc *dev; |
| 1046 | u32 flush_bit; |
| 1047 | unsigned long timeout; |
| 1048 | |
| 1049 | ep = container_of(_ep, struct langwell_ep, ep); |
| 1050 | dev = ep->dev; |
| 1051 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1052 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1053 | |
| 1054 | if (!_ep || !ep->desc) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1055 | dev_vdbg(&dev->pdev->dev, "ep or ep->desc is NULL\n"); |
| 1056 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1057 | return; |
| 1058 | } |
| 1059 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1060 | dev_vdbg(&dev->pdev->dev, "%s-%s fifo flush\n", |
| 1061 | _ep->name, DIR_STRING(ep)); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1062 | |
| 1063 | /* flush endpoint buffer */ |
| 1064 | if (ep->ep_num == 0) |
| 1065 | flush_bit = (1 << 16) | 1; |
| 1066 | else if (is_in(ep)) |
| 1067 | flush_bit = 1 << (ep->ep_num + 16); /* TX */ |
| 1068 | else |
| 1069 | flush_bit = 1 << ep->ep_num; /* RX */ |
| 1070 | |
| 1071 | /* wait until flush complete */ |
| 1072 | timeout = jiffies + FLUSH_TIMEOUT; |
| 1073 | do { |
| 1074 | writel(flush_bit, &dev->op_regs->endptflush); |
| 1075 | while (readl(&dev->op_regs->endptflush)) { |
| 1076 | if (time_after(jiffies, timeout)) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1077 | dev_err(&dev->pdev->dev, "ep flush timeout\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1078 | goto done; |
| 1079 | } |
| 1080 | cpu_relax(); |
| 1081 | } |
| 1082 | } while (readl(&dev->op_regs->endptstat) & flush_bit); |
| 1083 | done: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1084 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1085 | } |
| 1086 | |
| 1087 | |
| 1088 | /* endpoints operations structure */ |
| 1089 | static const struct usb_ep_ops langwell_ep_ops = { |
| 1090 | |
| 1091 | /* configure endpoint, making it usable */ |
| 1092 | .enable = langwell_ep_enable, |
| 1093 | |
| 1094 | /* endpoint is no longer usable */ |
| 1095 | .disable = langwell_ep_disable, |
| 1096 | |
| 1097 | /* allocate a request object to use with this endpoint */ |
| 1098 | .alloc_request = langwell_alloc_request, |
| 1099 | |
| 1100 | /* free a request object */ |
| 1101 | .free_request = langwell_free_request, |
| 1102 | |
| 1103 | /* queue (submits) an I/O requests to an endpoint */ |
| 1104 | .queue = langwell_ep_queue, |
| 1105 | |
| 1106 | /* dequeue (cancels, unlinks) an I/O request from an endpoint */ |
| 1107 | .dequeue = langwell_ep_dequeue, |
| 1108 | |
| 1109 | /* set the endpoint halt feature */ |
| 1110 | .set_halt = langwell_ep_set_halt, |
| 1111 | |
| 1112 | /* set the halt feature and ignores clear requests */ |
| 1113 | .set_wedge = langwell_ep_set_wedge, |
| 1114 | |
| 1115 | /* flush contents of a fifo */ |
| 1116 | .fifo_flush = langwell_ep_fifo_flush, |
| 1117 | }; |
| 1118 | |
| 1119 | |
| 1120 | /*-------------------------------------------------------------------------*/ |
| 1121 | |
| 1122 | /* device controller usb_gadget_ops structure */ |
| 1123 | |
| 1124 | /* returns the current frame number */ |
| 1125 | static int langwell_get_frame(struct usb_gadget *_gadget) |
| 1126 | { |
| 1127 | struct langwell_udc *dev; |
| 1128 | u16 retval; |
| 1129 | |
| 1130 | if (!_gadget) |
| 1131 | return -ENODEV; |
| 1132 | |
| 1133 | dev = container_of(_gadget, struct langwell_udc, gadget); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1134 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1135 | |
| 1136 | retval = readl(&dev->op_regs->frindex) & FRINDEX_MASK; |
| 1137 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1138 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1139 | return retval; |
| 1140 | } |
| 1141 | |
| 1142 | |
JiebingLi | 513b91b | 2010-08-05 14:18:13 +0100 | [diff] [blame] | 1143 | /* enter or exit PHY low power state */ |
| 1144 | static void langwell_phy_low_power(struct langwell_udc *dev, bool flag) |
| 1145 | { |
| 1146 | u32 devlc; |
| 1147 | u8 devlc_byte2; |
| 1148 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| 1149 | |
| 1150 | devlc = readl(&dev->op_regs->devlc); |
| 1151 | dev_vdbg(&dev->pdev->dev, "devlc = 0x%08x\n", devlc); |
| 1152 | |
| 1153 | if (flag) |
| 1154 | devlc |= LPM_PHCD; |
| 1155 | else |
| 1156 | devlc &= ~LPM_PHCD; |
| 1157 | |
| 1158 | /* FIXME: workaround for Langwell A1/A2/A3 sighting */ |
| 1159 | devlc_byte2 = (devlc >> 16) & 0xff; |
| 1160 | writeb(devlc_byte2, (u8 *)&dev->op_regs->devlc + 2); |
| 1161 | |
| 1162 | devlc = readl(&dev->op_regs->devlc); |
| 1163 | dev_vdbg(&dev->pdev->dev, |
| 1164 | "%s PHY low power suspend, devlc = 0x%08x\n", |
| 1165 | flag ? "enter" : "exit", devlc); |
| 1166 | } |
| 1167 | |
| 1168 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1169 | /* tries to wake up the host connected to this gadget */ |
| 1170 | static int langwell_wakeup(struct usb_gadget *_gadget) |
| 1171 | { |
| 1172 | struct langwell_udc *dev; |
JiebingLi | 513b91b | 2010-08-05 14:18:13 +0100 | [diff] [blame] | 1173 | u32 portsc1; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1174 | unsigned long flags; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1175 | |
| 1176 | if (!_gadget) |
| 1177 | return 0; |
| 1178 | |
| 1179 | dev = container_of(_gadget, struct langwell_udc, gadget); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1180 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1181 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1182 | /* remote wakeup feature not enabled by host */ |
| 1183 | if (!dev->remote_wakeup) { |
| 1184 | dev_info(&dev->pdev->dev, "remote wakeup is disabled\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1185 | return -ENOTSUPP; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1186 | } |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1187 | |
| 1188 | spin_lock_irqsave(&dev->lock, flags); |
| 1189 | |
| 1190 | portsc1 = readl(&dev->op_regs->portsc1); |
| 1191 | if (!(portsc1 & PORTS_SUSP)) { |
| 1192 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1193 | return 0; |
| 1194 | } |
| 1195 | |
JiebingLi | 513b91b | 2010-08-05 14:18:13 +0100 | [diff] [blame] | 1196 | /* LPM L1 to L0 or legacy remote wakeup */ |
| 1197 | if (dev->lpm && dev->lpm_state == LPM_L1) |
| 1198 | dev_info(&dev->pdev->dev, "LPM L1 to L0 remote wakeup\n"); |
| 1199 | else |
| 1200 | dev_info(&dev->pdev->dev, "device remote wakeup\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1201 | |
| 1202 | /* exit PHY low power suspend */ |
JiebingLi | 513b91b | 2010-08-05 14:18:13 +0100 | [diff] [blame] | 1203 | if (dev->pdev->device != 0x0829) |
| 1204 | langwell_phy_low_power(dev, 0); |
| 1205 | |
| 1206 | /* force port resume */ |
| 1207 | portsc1 |= PORTS_FPR; |
| 1208 | writel(portsc1, &dev->op_regs->portsc1); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1209 | |
| 1210 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1211 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1212 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1213 | return 0; |
| 1214 | } |
| 1215 | |
| 1216 | |
| 1217 | /* notify controller that VBUS is powered or not */ |
| 1218 | static int langwell_vbus_session(struct usb_gadget *_gadget, int is_active) |
| 1219 | { |
| 1220 | struct langwell_udc *dev; |
| 1221 | unsigned long flags; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1222 | u32 usbcmd; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1223 | |
| 1224 | if (!_gadget) |
| 1225 | return -ENODEV; |
| 1226 | |
| 1227 | dev = container_of(_gadget, struct langwell_udc, gadget); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1228 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1229 | |
| 1230 | spin_lock_irqsave(&dev->lock, flags); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1231 | dev_vdbg(&dev->pdev->dev, "VBUS status: %s\n", |
| 1232 | is_active ? "on" : "off"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1233 | |
| 1234 | dev->vbus_active = (is_active != 0); |
| 1235 | if (dev->driver && dev->softconnected && dev->vbus_active) { |
| 1236 | usbcmd = readl(&dev->op_regs->usbcmd); |
| 1237 | usbcmd |= CMD_RUNSTOP; |
| 1238 | writel(usbcmd, &dev->op_regs->usbcmd); |
| 1239 | } else { |
| 1240 | usbcmd = readl(&dev->op_regs->usbcmd); |
| 1241 | usbcmd &= ~CMD_RUNSTOP; |
| 1242 | writel(usbcmd, &dev->op_regs->usbcmd); |
| 1243 | } |
| 1244 | |
| 1245 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1246 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1247 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1248 | return 0; |
| 1249 | } |
| 1250 | |
| 1251 | |
| 1252 | /* constrain controller's VBUS power usage */ |
| 1253 | static int langwell_vbus_draw(struct usb_gadget *_gadget, unsigned mA) |
| 1254 | { |
| 1255 | struct langwell_udc *dev; |
| 1256 | |
| 1257 | if (!_gadget) |
| 1258 | return -ENODEV; |
| 1259 | |
| 1260 | dev = container_of(_gadget, struct langwell_udc, gadget); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1261 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1262 | |
| 1263 | if (dev->transceiver) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1264 | dev_vdbg(&dev->pdev->dev, "otg_set_power\n"); |
| 1265 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1266 | return otg_set_power(dev->transceiver, mA); |
| 1267 | } |
| 1268 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1269 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1270 | return -ENOTSUPP; |
| 1271 | } |
| 1272 | |
| 1273 | |
| 1274 | /* D+ pullup, software-controlled connect/disconnect to USB host */ |
| 1275 | static int langwell_pullup(struct usb_gadget *_gadget, int is_on) |
| 1276 | { |
| 1277 | struct langwell_udc *dev; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1278 | u32 usbcmd; |
| 1279 | unsigned long flags; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1280 | |
| 1281 | if (!_gadget) |
| 1282 | return -ENODEV; |
| 1283 | |
| 1284 | dev = container_of(_gadget, struct langwell_udc, gadget); |
| 1285 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1286 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1287 | |
| 1288 | spin_lock_irqsave(&dev->lock, flags); |
| 1289 | dev->softconnected = (is_on != 0); |
| 1290 | |
| 1291 | if (dev->driver && dev->softconnected && dev->vbus_active) { |
| 1292 | usbcmd = readl(&dev->op_regs->usbcmd); |
| 1293 | usbcmd |= CMD_RUNSTOP; |
| 1294 | writel(usbcmd, &dev->op_regs->usbcmd); |
| 1295 | } else { |
| 1296 | usbcmd = readl(&dev->op_regs->usbcmd); |
| 1297 | usbcmd &= ~CMD_RUNSTOP; |
| 1298 | writel(usbcmd, &dev->op_regs->usbcmd); |
| 1299 | } |
| 1300 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1301 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1302 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1303 | return 0; |
| 1304 | } |
| 1305 | |
Felipe Balbi | 2c7f098 | 2011-10-08 13:17:34 +0300 | [diff] [blame] | 1306 | static int langwell_start(struct usb_gadget *g, |
| 1307 | struct usb_gadget_driver *driver); |
| 1308 | |
| 1309 | static int langwell_stop(struct usb_gadget *g, |
| 1310 | struct usb_gadget_driver *driver); |
| 1311 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1312 | /* device controller usb_gadget_ops structure */ |
| 1313 | static const struct usb_gadget_ops langwell_ops = { |
| 1314 | |
| 1315 | /* returns the current frame number */ |
| 1316 | .get_frame = langwell_get_frame, |
| 1317 | |
| 1318 | /* tries to wake up the host connected to this gadget */ |
| 1319 | .wakeup = langwell_wakeup, |
| 1320 | |
| 1321 | /* set the device selfpowered feature, always selfpowered */ |
| 1322 | /* .set_selfpowered = langwell_set_selfpowered, */ |
| 1323 | |
| 1324 | /* notify controller that VBUS is powered or not */ |
| 1325 | .vbus_session = langwell_vbus_session, |
| 1326 | |
| 1327 | /* constrain controller's VBUS power usage */ |
| 1328 | .vbus_draw = langwell_vbus_draw, |
| 1329 | |
| 1330 | /* D+ pullup, software-controlled connect/disconnect to USB host */ |
| 1331 | .pullup = langwell_pullup, |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 1332 | |
Felipe Balbi | 2c7f098 | 2011-10-08 13:17:34 +0300 | [diff] [blame] | 1333 | .udc_start = langwell_start, |
| 1334 | .udc_stop = langwell_stop, |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1335 | }; |
| 1336 | |
| 1337 | |
| 1338 | /*-------------------------------------------------------------------------*/ |
| 1339 | |
| 1340 | /* device controller operations */ |
| 1341 | |
| 1342 | /* reset device controller */ |
| 1343 | static int langwell_udc_reset(struct langwell_udc *dev) |
| 1344 | { |
| 1345 | u32 usbcmd, usbmode, devlc, endpointlistaddr; |
JiebingLi | 513b91b | 2010-08-05 14:18:13 +0100 | [diff] [blame] | 1346 | u8 devlc_byte0, devlc_byte2; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1347 | unsigned long timeout; |
| 1348 | |
| 1349 | if (!dev) |
| 1350 | return -EINVAL; |
| 1351 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1352 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1353 | |
| 1354 | /* set controller to stop state */ |
| 1355 | usbcmd = readl(&dev->op_regs->usbcmd); |
| 1356 | usbcmd &= ~CMD_RUNSTOP; |
| 1357 | writel(usbcmd, &dev->op_regs->usbcmd); |
| 1358 | |
| 1359 | /* reset device controller */ |
| 1360 | usbcmd = readl(&dev->op_regs->usbcmd); |
| 1361 | usbcmd |= CMD_RST; |
| 1362 | writel(usbcmd, &dev->op_regs->usbcmd); |
| 1363 | |
| 1364 | /* wait for reset to complete */ |
| 1365 | timeout = jiffies + RESET_TIMEOUT; |
| 1366 | while (readl(&dev->op_regs->usbcmd) & CMD_RST) { |
| 1367 | if (time_after(jiffies, timeout)) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1368 | dev_err(&dev->pdev->dev, "device reset timeout\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1369 | return -ETIMEDOUT; |
| 1370 | } |
| 1371 | cpu_relax(); |
| 1372 | } |
| 1373 | |
| 1374 | /* set controller to device mode */ |
| 1375 | usbmode = readl(&dev->op_regs->usbmode); |
| 1376 | usbmode |= MODE_DEVICE; |
| 1377 | |
| 1378 | /* turn setup lockout off, require setup tripwire in usbcmd */ |
| 1379 | usbmode |= MODE_SLOM; |
| 1380 | |
| 1381 | writel(usbmode, &dev->op_regs->usbmode); |
| 1382 | usbmode = readl(&dev->op_regs->usbmode); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1383 | dev_vdbg(&dev->pdev->dev, "usbmode=0x%08x\n", usbmode); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1384 | |
| 1385 | /* Write-Clear setup status */ |
| 1386 | writel(0, &dev->op_regs->usbsts); |
| 1387 | |
| 1388 | /* if support USB LPM, ACK all LPM token */ |
| 1389 | if (dev->lpm) { |
| 1390 | devlc = readl(&dev->op_regs->devlc); |
JiebingLi | 513b91b | 2010-08-05 14:18:13 +0100 | [diff] [blame] | 1391 | dev_vdbg(&dev->pdev->dev, "devlc = 0x%08x\n", devlc); |
| 1392 | /* FIXME: workaround for Langwell A1/A2/A3 sighting */ |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1393 | devlc &= ~LPM_STL; /* don't STALL LPM token */ |
| 1394 | devlc &= ~LPM_NYT_ACK; /* ACK LPM token */ |
JiebingLi | 513b91b | 2010-08-05 14:18:13 +0100 | [diff] [blame] | 1395 | devlc_byte0 = devlc & 0xff; |
| 1396 | devlc_byte2 = (devlc >> 16) & 0xff; |
| 1397 | writeb(devlc_byte0, (u8 *)&dev->op_regs->devlc); |
| 1398 | writeb(devlc_byte2, (u8 *)&dev->op_regs->devlc + 2); |
| 1399 | devlc = readl(&dev->op_regs->devlc); |
| 1400 | dev_vdbg(&dev->pdev->dev, |
| 1401 | "ACK LPM token, devlc = 0x%08x\n", devlc); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1402 | } |
| 1403 | |
| 1404 | /* fill endpointlistaddr register */ |
| 1405 | endpointlistaddr = dev->ep_dqh_dma; |
| 1406 | endpointlistaddr &= ENDPOINTLISTADDR_MASK; |
| 1407 | writel(endpointlistaddr, &dev->op_regs->endpointlistaddr); |
| 1408 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1409 | dev_vdbg(&dev->pdev->dev, |
| 1410 | "dQH base (vir: %p, phy: 0x%08x), endpointlistaddr=0x%08x\n", |
| 1411 | dev->ep_dqh, endpointlistaddr, |
| 1412 | readl(&dev->op_regs->endpointlistaddr)); |
| 1413 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1414 | return 0; |
| 1415 | } |
| 1416 | |
| 1417 | |
| 1418 | /* reinitialize device controller endpoints */ |
| 1419 | static int eps_reinit(struct langwell_udc *dev) |
| 1420 | { |
| 1421 | struct langwell_ep *ep; |
| 1422 | char name[14]; |
| 1423 | int i; |
| 1424 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1425 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1426 | |
| 1427 | /* initialize ep0 */ |
| 1428 | ep = &dev->ep[0]; |
| 1429 | ep->dev = dev; |
| 1430 | strncpy(ep->name, "ep0", sizeof(ep->name)); |
| 1431 | ep->ep.name = ep->name; |
| 1432 | ep->ep.ops = &langwell_ep_ops; |
| 1433 | ep->stopped = 0; |
| 1434 | ep->ep.maxpacket = EP0_MAX_PKT_SIZE; |
| 1435 | ep->ep_num = 0; |
| 1436 | ep->desc = &langwell_ep0_desc; |
| 1437 | INIT_LIST_HEAD(&ep->queue); |
| 1438 | |
| 1439 | ep->ep_type = USB_ENDPOINT_XFER_CONTROL; |
| 1440 | |
| 1441 | /* initialize other endpoints */ |
| 1442 | for (i = 2; i < dev->ep_max; i++) { |
| 1443 | ep = &dev->ep[i]; |
| 1444 | if (i % 2) |
| 1445 | snprintf(name, sizeof(name), "ep%din", i / 2); |
| 1446 | else |
| 1447 | snprintf(name, sizeof(name), "ep%dout", i / 2); |
| 1448 | ep->dev = dev; |
| 1449 | strncpy(ep->name, name, sizeof(ep->name)); |
| 1450 | ep->ep.name = ep->name; |
| 1451 | |
| 1452 | ep->ep.ops = &langwell_ep_ops; |
| 1453 | ep->stopped = 0; |
| 1454 | ep->ep.maxpacket = (unsigned short) ~0; |
| 1455 | ep->ep_num = i / 2; |
| 1456 | |
| 1457 | INIT_LIST_HEAD(&ep->queue); |
| 1458 | list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1459 | } |
| 1460 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1461 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1462 | return 0; |
| 1463 | } |
| 1464 | |
| 1465 | |
| 1466 | /* enable interrupt and set controller to run state */ |
| 1467 | static void langwell_udc_start(struct langwell_udc *dev) |
| 1468 | { |
| 1469 | u32 usbintr, usbcmd; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1470 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1471 | |
| 1472 | /* enable interrupts */ |
| 1473 | usbintr = INTR_ULPIE /* ULPI */ |
| 1474 | | INTR_SLE /* suspend */ |
| 1475 | /* | INTR_SRE SOF received */ |
| 1476 | | INTR_URE /* USB reset */ |
| 1477 | | INTR_AAE /* async advance */ |
| 1478 | | INTR_SEE /* system error */ |
| 1479 | | INTR_FRE /* frame list rollover */ |
| 1480 | | INTR_PCE /* port change detect */ |
| 1481 | | INTR_UEE /* USB error interrupt */ |
| 1482 | | INTR_UE; /* USB interrupt */ |
| 1483 | writel(usbintr, &dev->op_regs->usbintr); |
| 1484 | |
| 1485 | /* clear stopped bit */ |
| 1486 | dev->stopped = 0; |
| 1487 | |
| 1488 | /* set controller to run */ |
| 1489 | usbcmd = readl(&dev->op_regs->usbcmd); |
| 1490 | usbcmd |= CMD_RUNSTOP; |
| 1491 | writel(usbcmd, &dev->op_regs->usbcmd); |
| 1492 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1493 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1494 | } |
| 1495 | |
| 1496 | |
| 1497 | /* disable interrupt and set controller to stop state */ |
| 1498 | static void langwell_udc_stop(struct langwell_udc *dev) |
| 1499 | { |
| 1500 | u32 usbcmd; |
| 1501 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1502 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1503 | |
| 1504 | /* disable all interrupts */ |
| 1505 | writel(0, &dev->op_regs->usbintr); |
| 1506 | |
| 1507 | /* set stopped bit */ |
| 1508 | dev->stopped = 1; |
| 1509 | |
| 1510 | /* set controller to stop state */ |
| 1511 | usbcmd = readl(&dev->op_regs->usbcmd); |
| 1512 | usbcmd &= ~CMD_RUNSTOP; |
| 1513 | writel(usbcmd, &dev->op_regs->usbcmd); |
| 1514 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1515 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1516 | } |
| 1517 | |
| 1518 | |
| 1519 | /* stop all USB activities */ |
Alexander Shishkin | 37fd371 | 2011-12-21 10:19:40 +0200 | [diff] [blame] | 1520 | static void stop_activity(struct langwell_udc *dev) |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1521 | { |
| 1522 | struct langwell_ep *ep; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1523 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1524 | |
| 1525 | nuke(&dev->ep[0], -ESHUTDOWN); |
| 1526 | |
| 1527 | list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { |
| 1528 | nuke(ep, -ESHUTDOWN); |
| 1529 | } |
| 1530 | |
| 1531 | /* report disconnect; the driver is already quiesced */ |
Alexander Shishkin | 37fd371 | 2011-12-21 10:19:40 +0200 | [diff] [blame] | 1532 | if (dev->driver) { |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1533 | spin_unlock(&dev->lock); |
Alexander Shishkin | 37fd371 | 2011-12-21 10:19:40 +0200 | [diff] [blame] | 1534 | dev->driver->disconnect(&dev->gadget); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1535 | spin_lock(&dev->lock); |
| 1536 | } |
| 1537 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1538 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1539 | } |
| 1540 | |
| 1541 | |
| 1542 | /*-------------------------------------------------------------------------*/ |
| 1543 | |
| 1544 | /* device "function" sysfs attribute file */ |
| 1545 | static ssize_t show_function(struct device *_dev, |
| 1546 | struct device_attribute *attr, char *buf) |
| 1547 | { |
Felipe Balbi | 5bc639f | 2011-10-08 13:08:01 +0300 | [diff] [blame] | 1548 | struct langwell_udc *dev = dev_get_drvdata(_dev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1549 | |
| 1550 | if (!dev->driver || !dev->driver->function |
| 1551 | || strlen(dev->driver->function) > PAGE_SIZE) |
| 1552 | return 0; |
| 1553 | |
| 1554 | return scnprintf(buf, PAGE_SIZE, "%s\n", dev->driver->function); |
| 1555 | } |
| 1556 | static DEVICE_ATTR(function, S_IRUGO, show_function, NULL); |
| 1557 | |
| 1558 | |
Randy Dunlap | 56526c0 | 2011-10-07 13:57:42 -0700 | [diff] [blame] | 1559 | static inline enum usb_device_speed lpm_device_speed(u32 reg) |
| 1560 | { |
| 1561 | switch (LPM_PSPD(reg)) { |
| 1562 | case LPM_SPEED_HIGH: |
| 1563 | return USB_SPEED_HIGH; |
| 1564 | case LPM_SPEED_FULL: |
| 1565 | return USB_SPEED_FULL; |
| 1566 | case LPM_SPEED_LOW: |
| 1567 | return USB_SPEED_LOW; |
| 1568 | default: |
| 1569 | return USB_SPEED_UNKNOWN; |
| 1570 | } |
| 1571 | } |
| 1572 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1573 | /* device "langwell_udc" sysfs attribute file */ |
| 1574 | static ssize_t show_langwell_udc(struct device *_dev, |
| 1575 | struct device_attribute *attr, char *buf) |
| 1576 | { |
Felipe Balbi | 5bc639f | 2011-10-08 13:08:01 +0300 | [diff] [blame] | 1577 | struct langwell_udc *dev = dev_get_drvdata(_dev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1578 | struct langwell_request *req; |
| 1579 | struct langwell_ep *ep = NULL; |
| 1580 | char *next; |
| 1581 | unsigned size; |
| 1582 | unsigned t; |
| 1583 | unsigned i; |
| 1584 | unsigned long flags; |
| 1585 | u32 tmp_reg; |
| 1586 | |
| 1587 | next = buf; |
| 1588 | size = PAGE_SIZE; |
| 1589 | spin_lock_irqsave(&dev->lock, flags); |
| 1590 | |
| 1591 | /* driver basic information */ |
| 1592 | t = scnprintf(next, size, |
| 1593 | DRIVER_DESC "\n" |
| 1594 | "%s version: %s\n" |
| 1595 | "Gadget driver: %s\n\n", |
| 1596 | driver_name, DRIVER_VERSION, |
| 1597 | dev->driver ? dev->driver->driver.name : "(none)"); |
| 1598 | size -= t; |
| 1599 | next += t; |
| 1600 | |
| 1601 | /* device registers */ |
| 1602 | tmp_reg = readl(&dev->op_regs->usbcmd); |
| 1603 | t = scnprintf(next, size, |
| 1604 | "USBCMD reg:\n" |
| 1605 | "SetupTW: %d\n" |
| 1606 | "Run/Stop: %s\n\n", |
| 1607 | (tmp_reg & CMD_SUTW) ? 1 : 0, |
| 1608 | (tmp_reg & CMD_RUNSTOP) ? "Run" : "Stop"); |
| 1609 | size -= t; |
| 1610 | next += t; |
| 1611 | |
| 1612 | tmp_reg = readl(&dev->op_regs->usbsts); |
| 1613 | t = scnprintf(next, size, |
| 1614 | "USB Status Reg:\n" |
| 1615 | "Device Suspend: %d\n" |
| 1616 | "Reset Received: %d\n" |
| 1617 | "System Error: %s\n" |
| 1618 | "USB Error Interrupt: %s\n\n", |
| 1619 | (tmp_reg & STS_SLI) ? 1 : 0, |
| 1620 | (tmp_reg & STS_URI) ? 1 : 0, |
| 1621 | (tmp_reg & STS_SEI) ? "Error" : "No error", |
| 1622 | (tmp_reg & STS_UEI) ? "Error detected" : "No error"); |
| 1623 | size -= t; |
| 1624 | next += t; |
| 1625 | |
| 1626 | tmp_reg = readl(&dev->op_regs->usbintr); |
| 1627 | t = scnprintf(next, size, |
| 1628 | "USB Intrrupt Enable Reg:\n" |
| 1629 | "Sleep Enable: %d\n" |
| 1630 | "SOF Received Enable: %d\n" |
| 1631 | "Reset Enable: %d\n" |
| 1632 | "System Error Enable: %d\n" |
| 1633 | "Port Change Dectected Enable: %d\n" |
| 1634 | "USB Error Intr Enable: %d\n" |
| 1635 | "USB Intr Enable: %d\n\n", |
| 1636 | (tmp_reg & INTR_SLE) ? 1 : 0, |
| 1637 | (tmp_reg & INTR_SRE) ? 1 : 0, |
| 1638 | (tmp_reg & INTR_URE) ? 1 : 0, |
| 1639 | (tmp_reg & INTR_SEE) ? 1 : 0, |
| 1640 | (tmp_reg & INTR_PCE) ? 1 : 0, |
| 1641 | (tmp_reg & INTR_UEE) ? 1 : 0, |
| 1642 | (tmp_reg & INTR_UE) ? 1 : 0); |
| 1643 | size -= t; |
| 1644 | next += t; |
| 1645 | |
| 1646 | tmp_reg = readl(&dev->op_regs->frindex); |
| 1647 | t = scnprintf(next, size, |
| 1648 | "USB Frame Index Reg:\n" |
| 1649 | "Frame Number is 0x%08x\n\n", |
| 1650 | (tmp_reg & FRINDEX_MASK)); |
| 1651 | size -= t; |
| 1652 | next += t; |
| 1653 | |
| 1654 | tmp_reg = readl(&dev->op_regs->deviceaddr); |
| 1655 | t = scnprintf(next, size, |
| 1656 | "USB Device Address Reg:\n" |
| 1657 | "Device Addr is 0x%x\n\n", |
| 1658 | USBADR(tmp_reg)); |
| 1659 | size -= t; |
| 1660 | next += t; |
| 1661 | |
| 1662 | tmp_reg = readl(&dev->op_regs->endpointlistaddr); |
| 1663 | t = scnprintf(next, size, |
| 1664 | "USB Endpoint List Address Reg:\n" |
| 1665 | "Endpoint List Pointer is 0x%x\n\n", |
| 1666 | EPBASE(tmp_reg)); |
| 1667 | size -= t; |
| 1668 | next += t; |
| 1669 | |
| 1670 | tmp_reg = readl(&dev->op_regs->portsc1); |
| 1671 | t = scnprintf(next, size, |
| 1672 | "USB Port Status & Control Reg:\n" |
| 1673 | "Port Reset: %s\n" |
| 1674 | "Port Suspend Mode: %s\n" |
| 1675 | "Over-current Change: %s\n" |
| 1676 | "Port Enable/Disable Change: %s\n" |
| 1677 | "Port Enabled/Disabled: %s\n" |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1678 | "Current Connect Status: %s\n" |
| 1679 | "LPM Suspend Status: %s\n\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1680 | (tmp_reg & PORTS_PR) ? "Reset" : "Not Reset", |
| 1681 | (tmp_reg & PORTS_SUSP) ? "Suspend " : "Not Suspend", |
| 1682 | (tmp_reg & PORTS_OCC) ? "Detected" : "No", |
| 1683 | (tmp_reg & PORTS_PEC) ? "Changed" : "Not Changed", |
| 1684 | (tmp_reg & PORTS_PE) ? "Enable" : "Not Correct", |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1685 | (tmp_reg & PORTS_CCS) ? "Attached" : "Not Attached", |
| 1686 | (tmp_reg & PORTS_SLP) ? "LPM L1" : "LPM L0"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1687 | size -= t; |
| 1688 | next += t; |
| 1689 | |
| 1690 | tmp_reg = readl(&dev->op_regs->devlc); |
| 1691 | t = scnprintf(next, size, |
| 1692 | "Device LPM Control Reg:\n" |
| 1693 | "Parallel Transceiver : %d\n" |
| 1694 | "Serial Transceiver : %d\n" |
| 1695 | "Port Speed: %s\n" |
| 1696 | "Port Force Full Speed Connenct: %s\n" |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1697 | "PHY Low Power Suspend Clock: %s\n" |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1698 | "BmAttributes: %d\n\n", |
| 1699 | LPM_PTS(tmp_reg), |
| 1700 | (tmp_reg & LPM_STS) ? 1 : 0, |
Michal Nazarewicz | e538dfd | 2011-08-30 17:11:19 +0200 | [diff] [blame] | 1701 | usb_speed_string(lpm_device_speed(tmp_reg)), |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1702 | (tmp_reg & LPM_PFSC) ? "Force Full Speed" : "Not Force", |
| 1703 | (tmp_reg & LPM_PHCD) ? "Disabled" : "Enabled", |
| 1704 | LPM_BA(tmp_reg)); |
| 1705 | size -= t; |
| 1706 | next += t; |
| 1707 | |
| 1708 | tmp_reg = readl(&dev->op_regs->usbmode); |
| 1709 | t = scnprintf(next, size, |
| 1710 | "USB Mode Reg:\n" |
| 1711 | "Controller Mode is : %s\n\n", ({ |
| 1712 | char *s; |
| 1713 | switch (MODE_CM(tmp_reg)) { |
| 1714 | case MODE_IDLE: |
| 1715 | s = "Idle"; break; |
| 1716 | case MODE_DEVICE: |
| 1717 | s = "Device Controller"; break; |
| 1718 | case MODE_HOST: |
| 1719 | s = "Host Controller"; break; |
| 1720 | default: |
| 1721 | s = "None"; break; |
| 1722 | } |
| 1723 | s; |
| 1724 | })); |
| 1725 | size -= t; |
| 1726 | next += t; |
| 1727 | |
| 1728 | tmp_reg = readl(&dev->op_regs->endptsetupstat); |
| 1729 | t = scnprintf(next, size, |
| 1730 | "Endpoint Setup Status Reg:\n" |
| 1731 | "SETUP on ep 0x%04x\n\n", |
| 1732 | tmp_reg & SETUPSTAT_MASK); |
| 1733 | size -= t; |
| 1734 | next += t; |
| 1735 | |
| 1736 | for (i = 0; i < dev->ep_max / 2; i++) { |
| 1737 | tmp_reg = readl(&dev->op_regs->endptctrl[i]); |
| 1738 | t = scnprintf(next, size, "EP Ctrl Reg [%d]: 0x%08x\n", |
| 1739 | i, tmp_reg); |
| 1740 | size -= t; |
| 1741 | next += t; |
| 1742 | } |
| 1743 | tmp_reg = readl(&dev->op_regs->endptprime); |
| 1744 | t = scnprintf(next, size, "EP Prime Reg: 0x%08x\n\n", tmp_reg); |
| 1745 | size -= t; |
| 1746 | next += t; |
| 1747 | |
| 1748 | /* langwell_udc, langwell_ep, langwell_request structure information */ |
| 1749 | ep = &dev->ep[0]; |
| 1750 | t = scnprintf(next, size, "%s MaxPacketSize: 0x%x, ep_num: %d\n", |
| 1751 | ep->ep.name, ep->ep.maxpacket, ep->ep_num); |
| 1752 | size -= t; |
| 1753 | next += t; |
| 1754 | |
| 1755 | if (list_empty(&ep->queue)) { |
| 1756 | t = scnprintf(next, size, "its req queue is empty\n\n"); |
| 1757 | size -= t; |
| 1758 | next += t; |
| 1759 | } else { |
| 1760 | list_for_each_entry(req, &ep->queue, queue) { |
| 1761 | t = scnprintf(next, size, |
| 1762 | "req %p actual 0x%x length 0x%x buf %p\n", |
| 1763 | &req->req, req->req.actual, |
| 1764 | req->req.length, req->req.buf); |
| 1765 | size -= t; |
| 1766 | next += t; |
| 1767 | } |
| 1768 | } |
| 1769 | /* other gadget->eplist ep */ |
| 1770 | list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { |
| 1771 | if (ep->desc) { |
| 1772 | t = scnprintf(next, size, |
| 1773 | "\n%s MaxPacketSize: 0x%x, " |
| 1774 | "ep_num: %d\n", |
| 1775 | ep->ep.name, ep->ep.maxpacket, |
| 1776 | ep->ep_num); |
| 1777 | size -= t; |
| 1778 | next += t; |
| 1779 | |
| 1780 | if (list_empty(&ep->queue)) { |
| 1781 | t = scnprintf(next, size, |
| 1782 | "its req queue is empty\n\n"); |
| 1783 | size -= t; |
| 1784 | next += t; |
| 1785 | } else { |
| 1786 | list_for_each_entry(req, &ep->queue, queue) { |
| 1787 | t = scnprintf(next, size, |
| 1788 | "req %p actual 0x%x length " |
| 1789 | "0x%x buf %p\n", |
| 1790 | &req->req, req->req.actual, |
| 1791 | req->req.length, req->req.buf); |
| 1792 | size -= t; |
| 1793 | next += t; |
| 1794 | } |
| 1795 | } |
| 1796 | } |
| 1797 | } |
| 1798 | |
| 1799 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1800 | return PAGE_SIZE - size; |
| 1801 | } |
| 1802 | static DEVICE_ATTR(langwell_udc, S_IRUGO, show_langwell_udc, NULL); |
| 1803 | |
| 1804 | |
JiebingLi | 3211cbc | 2010-08-05 14:18:21 +0100 | [diff] [blame] | 1805 | /* device "remote_wakeup" sysfs attribute file */ |
| 1806 | static ssize_t store_remote_wakeup(struct device *_dev, |
| 1807 | struct device_attribute *attr, const char *buf, size_t count) |
| 1808 | { |
Felipe Balbi | 5bc639f | 2011-10-08 13:08:01 +0300 | [diff] [blame] | 1809 | struct langwell_udc *dev = dev_get_drvdata(_dev); |
JiebingLi | 3211cbc | 2010-08-05 14:18:21 +0100 | [diff] [blame] | 1810 | unsigned long flags; |
| 1811 | ssize_t rc = count; |
| 1812 | |
| 1813 | if (count > 2) |
| 1814 | return -EINVAL; |
| 1815 | |
| 1816 | if (count > 0 && buf[count-1] == '\n') |
| 1817 | ((char *) buf)[count-1] = 0; |
| 1818 | |
| 1819 | if (buf[0] != '1') |
| 1820 | return -EINVAL; |
| 1821 | |
| 1822 | /* force remote wakeup enabled in case gadget driver doesn't support */ |
| 1823 | spin_lock_irqsave(&dev->lock, flags); |
| 1824 | dev->remote_wakeup = 1; |
| 1825 | dev->dev_status |= (1 << USB_DEVICE_REMOTE_WAKEUP); |
| 1826 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1827 | |
| 1828 | langwell_wakeup(&dev->gadget); |
| 1829 | |
| 1830 | return rc; |
| 1831 | } |
| 1832 | static DEVICE_ATTR(remote_wakeup, S_IWUSR, NULL, store_remote_wakeup); |
| 1833 | |
| 1834 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1835 | /*-------------------------------------------------------------------------*/ |
| 1836 | |
| 1837 | /* |
| 1838 | * when a driver is successfully registered, it will receive |
| 1839 | * control requests including set_configuration(), which enables |
| 1840 | * non-control requests. then usb traffic follows until a |
| 1841 | * disconnect is reported. then a host may connect again, or |
| 1842 | * the driver might get unbound. |
| 1843 | */ |
| 1844 | |
Felipe Balbi | 2c7f098 | 2011-10-08 13:17:34 +0300 | [diff] [blame] | 1845 | static int langwell_start(struct usb_gadget *g, |
| 1846 | struct usb_gadget_driver *driver) |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1847 | { |
Felipe Balbi | 2c7f098 | 2011-10-08 13:17:34 +0300 | [diff] [blame] | 1848 | struct langwell_udc *dev = gadget_to_langwell(g); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1849 | unsigned long flags; |
| 1850 | int retval; |
| 1851 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1852 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1853 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1854 | spin_lock_irqsave(&dev->lock, flags); |
| 1855 | |
| 1856 | /* hook up the driver ... */ |
| 1857 | driver->driver.bus = NULL; |
| 1858 | dev->driver = driver; |
| 1859 | dev->gadget.dev.driver = &driver->driver; |
| 1860 | |
| 1861 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1862 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1863 | retval = device_create_file(&dev->pdev->dev, &dev_attr_function); |
| 1864 | if (retval) |
Felipe Balbi | 2c7f098 | 2011-10-08 13:17:34 +0300 | [diff] [blame] | 1865 | goto err; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1866 | |
| 1867 | dev->usb_state = USB_STATE_ATTACHED; |
| 1868 | dev->ep0_state = WAIT_FOR_SETUP; |
| 1869 | dev->ep0_dir = USB_DIR_OUT; |
| 1870 | |
| 1871 | /* enable interrupt and set controller to run state */ |
| 1872 | if (dev->got_irq) |
| 1873 | langwell_udc_start(dev); |
| 1874 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1875 | dev_vdbg(&dev->pdev->dev, |
| 1876 | "After langwell_udc_start(), print all registers:\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1877 | print_all_registers(dev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1878 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1879 | dev_info(&dev->pdev->dev, "register driver: %s\n", |
| 1880 | driver->driver.name); |
| 1881 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Felipe Balbi | 2c7f098 | 2011-10-08 13:17:34 +0300 | [diff] [blame] | 1882 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1883 | return 0; |
| 1884 | |
Felipe Balbi | 2c7f098 | 2011-10-08 13:17:34 +0300 | [diff] [blame] | 1885 | err: |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1886 | dev->gadget.dev.driver = NULL; |
| 1887 | dev->driver = NULL; |
| 1888 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1889 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Felipe Balbi | 2c7f098 | 2011-10-08 13:17:34 +0300 | [diff] [blame] | 1890 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1891 | return retval; |
| 1892 | } |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1893 | |
| 1894 | /* unregister gadget driver */ |
Felipe Balbi | 2c7f098 | 2011-10-08 13:17:34 +0300 | [diff] [blame] | 1895 | static int langwell_stop(struct usb_gadget *g, |
| 1896 | struct usb_gadget_driver *driver) |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1897 | { |
Felipe Balbi | 2c7f098 | 2011-10-08 13:17:34 +0300 | [diff] [blame] | 1898 | struct langwell_udc *dev = gadget_to_langwell(g); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1899 | unsigned long flags; |
| 1900 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1901 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1902 | |
JiebingLi | 513b91b | 2010-08-05 14:18:13 +0100 | [diff] [blame] | 1903 | /* exit PHY low power suspend */ |
| 1904 | if (dev->pdev->device != 0x0829) |
| 1905 | langwell_phy_low_power(dev, 0); |
| 1906 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1907 | /* unbind OTG transceiver */ |
| 1908 | if (dev->transceiver) |
| 1909 | (void)otg_set_peripheral(dev->transceiver, 0); |
| 1910 | |
| 1911 | /* disable interrupt and set controller to stop state */ |
| 1912 | langwell_udc_stop(dev); |
| 1913 | |
| 1914 | dev->usb_state = USB_STATE_ATTACHED; |
| 1915 | dev->ep0_state = WAIT_FOR_SETUP; |
| 1916 | dev->ep0_dir = USB_DIR_OUT; |
| 1917 | |
| 1918 | spin_lock_irqsave(&dev->lock, flags); |
| 1919 | |
| 1920 | /* stop all usb activities */ |
| 1921 | dev->gadget.speed = USB_SPEED_UNKNOWN; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1922 | dev->gadget.dev.driver = NULL; |
| 1923 | dev->driver = NULL; |
Alexander Shishkin | 37fd371 | 2011-12-21 10:19:40 +0200 | [diff] [blame] | 1924 | stop_activity(dev); |
| 1925 | spin_unlock_irqrestore(&dev->lock, flags); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1926 | |
| 1927 | device_remove_file(&dev->pdev->dev, &dev_attr_function); |
| 1928 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1929 | dev_info(&dev->pdev->dev, "unregistered driver '%s'\n", |
| 1930 | driver->driver.name); |
| 1931 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Felipe Balbi | 2c7f098 | 2011-10-08 13:17:34 +0300 | [diff] [blame] | 1932 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1933 | return 0; |
| 1934 | } |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1935 | |
| 1936 | /*-------------------------------------------------------------------------*/ |
| 1937 | |
| 1938 | /* |
| 1939 | * setup tripwire is used as a semaphore to ensure that the setup data |
| 1940 | * payload is extracted from a dQH without being corrupted |
| 1941 | */ |
| 1942 | static void setup_tripwire(struct langwell_udc *dev) |
| 1943 | { |
| 1944 | u32 usbcmd, |
| 1945 | endptsetupstat; |
| 1946 | unsigned long timeout; |
| 1947 | struct langwell_dqh *dqh; |
| 1948 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1949 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1950 | |
| 1951 | /* ep0 OUT dQH */ |
| 1952 | dqh = &dev->ep_dqh[EP_DIR_OUT]; |
| 1953 | |
| 1954 | /* Write-Clear endptsetupstat */ |
| 1955 | endptsetupstat = readl(&dev->op_regs->endptsetupstat); |
| 1956 | writel(endptsetupstat, &dev->op_regs->endptsetupstat); |
| 1957 | |
| 1958 | /* wait until endptsetupstat is cleared */ |
| 1959 | timeout = jiffies + SETUPSTAT_TIMEOUT; |
| 1960 | while (readl(&dev->op_regs->endptsetupstat)) { |
| 1961 | if (time_after(jiffies, timeout)) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1962 | dev_err(&dev->pdev->dev, "setup_tripwire timeout\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1963 | break; |
| 1964 | } |
| 1965 | cpu_relax(); |
| 1966 | } |
| 1967 | |
| 1968 | /* while a hazard exists when setup packet arrives */ |
| 1969 | do { |
| 1970 | /* set setup tripwire bit */ |
| 1971 | usbcmd = readl(&dev->op_regs->usbcmd); |
| 1972 | writel(usbcmd | CMD_SUTW, &dev->op_regs->usbcmd); |
| 1973 | |
| 1974 | /* copy the setup packet to local buffer */ |
| 1975 | memcpy(&dev->local_setup_buff, &dqh->dqh_setup, 8); |
| 1976 | } while (!(readl(&dev->op_regs->usbcmd) & CMD_SUTW)); |
| 1977 | |
| 1978 | /* Write-Clear setup tripwire bit */ |
| 1979 | usbcmd = readl(&dev->op_regs->usbcmd); |
| 1980 | writel(usbcmd & ~CMD_SUTW, &dev->op_regs->usbcmd); |
| 1981 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1982 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1983 | } |
| 1984 | |
| 1985 | |
| 1986 | /* protocol ep0 stall, will automatically be cleared on new transaction */ |
| 1987 | static void ep0_stall(struct langwell_udc *dev) |
| 1988 | { |
| 1989 | u32 endptctrl; |
| 1990 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 1991 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 1992 | |
| 1993 | /* set TX and RX to stall */ |
| 1994 | endptctrl = readl(&dev->op_regs->endptctrl[0]); |
| 1995 | endptctrl |= EPCTRL_TXS | EPCTRL_RXS; |
| 1996 | writel(endptctrl, &dev->op_regs->endptctrl[0]); |
| 1997 | |
| 1998 | /* update ep0 state */ |
| 1999 | dev->ep0_state = WAIT_FOR_SETUP; |
| 2000 | dev->ep0_dir = USB_DIR_OUT; |
| 2001 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2002 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2003 | } |
| 2004 | |
| 2005 | |
| 2006 | /* PRIME a status phase for ep0 */ |
| 2007 | static int prime_status_phase(struct langwell_udc *dev, int dir) |
| 2008 | { |
| 2009 | struct langwell_request *req; |
| 2010 | struct langwell_ep *ep; |
| 2011 | int status = 0; |
| 2012 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2013 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2014 | |
| 2015 | if (dir == EP_DIR_IN) |
| 2016 | dev->ep0_dir = USB_DIR_IN; |
| 2017 | else |
| 2018 | dev->ep0_dir = USB_DIR_OUT; |
| 2019 | |
| 2020 | ep = &dev->ep[0]; |
| 2021 | dev->ep0_state = WAIT_FOR_OUT_STATUS; |
| 2022 | |
| 2023 | req = dev->status_req; |
| 2024 | |
| 2025 | req->ep = ep; |
| 2026 | req->req.length = 0; |
| 2027 | req->req.status = -EINPROGRESS; |
| 2028 | req->req.actual = 0; |
| 2029 | req->req.complete = NULL; |
| 2030 | req->dtd_count = 0; |
| 2031 | |
| 2032 | if (!req_to_dtd(req)) |
| 2033 | status = queue_dtd(ep, req); |
| 2034 | else |
| 2035 | return -ENOMEM; |
| 2036 | |
| 2037 | if (status) |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2038 | dev_err(&dev->pdev->dev, "can't queue ep0 status request\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2039 | |
| 2040 | list_add_tail(&req->queue, &ep->queue); |
| 2041 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2042 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2043 | return status; |
| 2044 | } |
| 2045 | |
| 2046 | |
| 2047 | /* SET_ADDRESS request routine */ |
| 2048 | static void set_address(struct langwell_udc *dev, u16 value, |
| 2049 | u16 index, u16 length) |
| 2050 | { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2051 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2052 | |
| 2053 | /* save the new address to device struct */ |
| 2054 | dev->dev_addr = (u8) value; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2055 | dev_vdbg(&dev->pdev->dev, "dev->dev_addr = %d\n", dev->dev_addr); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2056 | |
| 2057 | /* update usb state */ |
| 2058 | dev->usb_state = USB_STATE_ADDRESS; |
| 2059 | |
| 2060 | /* STATUS phase */ |
| 2061 | if (prime_status_phase(dev, EP_DIR_IN)) |
| 2062 | ep0_stall(dev); |
| 2063 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2064 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2065 | } |
| 2066 | |
| 2067 | |
| 2068 | /* return endpoint by windex */ |
| 2069 | static struct langwell_ep *get_ep_by_windex(struct langwell_udc *dev, |
| 2070 | u16 wIndex) |
| 2071 | { |
| 2072 | struct langwell_ep *ep; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2073 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2074 | |
| 2075 | if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) |
| 2076 | return &dev->ep[0]; |
| 2077 | |
| 2078 | list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { |
| 2079 | u8 bEndpointAddress; |
| 2080 | if (!ep->desc) |
| 2081 | continue; |
| 2082 | |
| 2083 | bEndpointAddress = ep->desc->bEndpointAddress; |
| 2084 | if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) |
| 2085 | continue; |
| 2086 | |
| 2087 | if ((wIndex & USB_ENDPOINT_NUMBER_MASK) |
| 2088 | == (bEndpointAddress & USB_ENDPOINT_NUMBER_MASK)) |
| 2089 | return ep; |
| 2090 | } |
| 2091 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2092 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2093 | return NULL; |
| 2094 | } |
| 2095 | |
| 2096 | |
| 2097 | /* return whether endpoint is stalled, 0: not stalled; 1: stalled */ |
| 2098 | static int ep_is_stall(struct langwell_ep *ep) |
| 2099 | { |
| 2100 | struct langwell_udc *dev = ep->dev; |
| 2101 | u32 endptctrl; |
| 2102 | int retval; |
| 2103 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2104 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2105 | |
| 2106 | endptctrl = readl(&dev->op_regs->endptctrl[ep->ep_num]); |
| 2107 | if (is_in(ep)) |
| 2108 | retval = endptctrl & EPCTRL_TXS ? 1 : 0; |
| 2109 | else |
| 2110 | retval = endptctrl & EPCTRL_RXS ? 1 : 0; |
| 2111 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2112 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2113 | return retval; |
| 2114 | } |
| 2115 | |
| 2116 | |
| 2117 | /* GET_STATUS request routine */ |
| 2118 | static void get_status(struct langwell_udc *dev, u8 request_type, u16 value, |
| 2119 | u16 index, u16 length) |
| 2120 | { |
| 2121 | struct langwell_request *req; |
| 2122 | struct langwell_ep *ep; |
| 2123 | u16 status_data = 0; /* 16 bits cpu view status data */ |
| 2124 | int status = 0; |
| 2125 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2126 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2127 | |
| 2128 | ep = &dev->ep[0]; |
| 2129 | |
| 2130 | if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) { |
| 2131 | /* get device status */ |
JiebingLi | 3211cbc | 2010-08-05 14:18:21 +0100 | [diff] [blame] | 2132 | status_data = dev->dev_status; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2133 | } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) { |
| 2134 | /* get interface status */ |
| 2135 | status_data = 0; |
| 2136 | } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) { |
| 2137 | /* get endpoint status */ |
| 2138 | struct langwell_ep *epn; |
| 2139 | epn = get_ep_by_windex(dev, index); |
| 2140 | /* stall if endpoint doesn't exist */ |
| 2141 | if (!epn) |
| 2142 | goto stall; |
| 2143 | |
| 2144 | status_data = ep_is_stall(epn) << USB_ENDPOINT_HALT; |
| 2145 | } |
| 2146 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2147 | dev_dbg(&dev->pdev->dev, "get status data: 0x%04x\n", status_data); |
| 2148 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2149 | dev->ep0_dir = USB_DIR_IN; |
| 2150 | |
| 2151 | /* borrow the per device status_req */ |
| 2152 | req = dev->status_req; |
| 2153 | |
| 2154 | /* fill in the reqest structure */ |
| 2155 | *((u16 *) req->req.buf) = cpu_to_le16(status_data); |
| 2156 | req->ep = ep; |
| 2157 | req->req.length = 2; |
| 2158 | req->req.status = -EINPROGRESS; |
| 2159 | req->req.actual = 0; |
| 2160 | req->req.complete = NULL; |
| 2161 | req->dtd_count = 0; |
| 2162 | |
| 2163 | /* prime the data phase */ |
| 2164 | if (!req_to_dtd(req)) |
| 2165 | status = queue_dtd(ep, req); |
| 2166 | else /* no mem */ |
| 2167 | goto stall; |
| 2168 | |
| 2169 | if (status) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2170 | dev_err(&dev->pdev->dev, |
| 2171 | "response error on GET_STATUS request\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2172 | goto stall; |
| 2173 | } |
| 2174 | |
| 2175 | list_add_tail(&req->queue, &ep->queue); |
| 2176 | dev->ep0_state = DATA_STATE_XMIT; |
| 2177 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2178 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2179 | return; |
| 2180 | stall: |
| 2181 | ep0_stall(dev); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2182 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2183 | } |
| 2184 | |
| 2185 | |
| 2186 | /* setup packet interrupt handler */ |
| 2187 | static void handle_setup_packet(struct langwell_udc *dev, |
| 2188 | struct usb_ctrlrequest *setup) |
| 2189 | { |
| 2190 | u16 wValue = le16_to_cpu(setup->wValue); |
| 2191 | u16 wIndex = le16_to_cpu(setup->wIndex); |
| 2192 | u16 wLength = le16_to_cpu(setup->wLength); |
Luo Andy | 7fc56f0 | 2010-11-23 10:41:21 +0800 | [diff] [blame] | 2193 | u32 portsc1; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2194 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2195 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2196 | |
| 2197 | /* ep0 fifo flush */ |
| 2198 | nuke(&dev->ep[0], -ESHUTDOWN); |
| 2199 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2200 | dev_dbg(&dev->pdev->dev, "SETUP %02x.%02x v%04x i%04x l%04x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2201 | setup->bRequestType, setup->bRequest, |
| 2202 | wValue, wIndex, wLength); |
| 2203 | |
| 2204 | /* RNDIS gadget delegate */ |
| 2205 | if ((setup->bRequestType == 0x21) && (setup->bRequest == 0x00)) { |
| 2206 | /* USB_CDC_SEND_ENCAPSULATED_COMMAND */ |
| 2207 | goto delegate; |
| 2208 | } |
| 2209 | |
| 2210 | /* USB_CDC_GET_ENCAPSULATED_RESPONSE */ |
| 2211 | if ((setup->bRequestType == 0xa1) && (setup->bRequest == 0x01)) { |
| 2212 | /* USB_CDC_GET_ENCAPSULATED_RESPONSE */ |
| 2213 | goto delegate; |
| 2214 | } |
| 2215 | |
| 2216 | /* We process some stardard setup requests here */ |
| 2217 | switch (setup->bRequest) { |
| 2218 | case USB_REQ_GET_STATUS: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2219 | dev_dbg(&dev->pdev->dev, "SETUP: USB_REQ_GET_STATUS\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2220 | /* get status, DATA and STATUS phase */ |
| 2221 | if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK)) |
| 2222 | != (USB_DIR_IN | USB_TYPE_STANDARD)) |
| 2223 | break; |
| 2224 | get_status(dev, setup->bRequestType, wValue, wIndex, wLength); |
| 2225 | goto end; |
| 2226 | |
| 2227 | case USB_REQ_SET_ADDRESS: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2228 | dev_dbg(&dev->pdev->dev, "SETUP: USB_REQ_SET_ADDRESS\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2229 | /* STATUS phase */ |
| 2230 | if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD |
| 2231 | | USB_RECIP_DEVICE)) |
| 2232 | break; |
| 2233 | set_address(dev, wValue, wIndex, wLength); |
| 2234 | goto end; |
| 2235 | |
| 2236 | case USB_REQ_CLEAR_FEATURE: |
| 2237 | case USB_REQ_SET_FEATURE: |
| 2238 | /* STATUS phase */ |
| 2239 | { |
| 2240 | int rc = -EOPNOTSUPP; |
| 2241 | if (setup->bRequest == USB_REQ_SET_FEATURE) |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2242 | dev_dbg(&dev->pdev->dev, |
| 2243 | "SETUP: USB_REQ_SET_FEATURE\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2244 | else if (setup->bRequest == USB_REQ_CLEAR_FEATURE) |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2245 | dev_dbg(&dev->pdev->dev, |
| 2246 | "SETUP: USB_REQ_CLEAR_FEATURE\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2247 | |
| 2248 | if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK)) |
| 2249 | == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) { |
| 2250 | struct langwell_ep *epn; |
| 2251 | epn = get_ep_by_windex(dev, wIndex); |
| 2252 | /* stall if endpoint doesn't exist */ |
| 2253 | if (!epn) { |
| 2254 | ep0_stall(dev); |
| 2255 | goto end; |
| 2256 | } |
| 2257 | |
| 2258 | if (wValue != 0 || wLength != 0 |
| 2259 | || epn->ep_num > dev->ep_max) |
| 2260 | break; |
| 2261 | |
| 2262 | spin_unlock(&dev->lock); |
| 2263 | rc = langwell_ep_set_halt(&epn->ep, |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2264 | (setup->bRequest == USB_REQ_SET_FEATURE) |
| 2265 | ? 1 : 0); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2266 | spin_lock(&dev->lock); |
| 2267 | |
| 2268 | } else if ((setup->bRequestType & (USB_RECIP_MASK |
| 2269 | | USB_TYPE_MASK)) == (USB_RECIP_DEVICE |
| 2270 | | USB_TYPE_STANDARD)) { |
JiebingLi | 3211cbc | 2010-08-05 14:18:21 +0100 | [diff] [blame] | 2271 | rc = 0; |
| 2272 | switch (wValue) { |
| 2273 | case USB_DEVICE_REMOTE_WAKEUP: |
| 2274 | if (setup->bRequest == USB_REQ_SET_FEATURE) { |
| 2275 | dev->remote_wakeup = 1; |
| 2276 | dev->dev_status |= (1 << wValue); |
| 2277 | } else { |
| 2278 | dev->remote_wakeup = 0; |
| 2279 | dev->dev_status &= ~(1 << wValue); |
| 2280 | } |
| 2281 | break; |
Luo Andy | 7fc56f0 | 2010-11-23 10:41:21 +0800 | [diff] [blame] | 2282 | case USB_DEVICE_TEST_MODE: |
| 2283 | dev_dbg(&dev->pdev->dev, "SETUP: TEST MODE\n"); |
| 2284 | if ((wIndex & 0xff) || |
| 2285 | (dev->gadget.speed != USB_SPEED_HIGH)) |
| 2286 | ep0_stall(dev); |
| 2287 | |
| 2288 | switch (wIndex >> 8) { |
| 2289 | case TEST_J: |
| 2290 | case TEST_K: |
| 2291 | case TEST_SE0_NAK: |
| 2292 | case TEST_PACKET: |
| 2293 | case TEST_FORCE_EN: |
| 2294 | if (prime_status_phase(dev, EP_DIR_IN)) |
| 2295 | ep0_stall(dev); |
| 2296 | portsc1 = readl(&dev->op_regs->portsc1); |
| 2297 | portsc1 |= (wIndex & 0xf00) << 8; |
| 2298 | writel(portsc1, &dev->op_regs->portsc1); |
| 2299 | goto end; |
| 2300 | default: |
| 2301 | rc = -EOPNOTSUPP; |
| 2302 | } |
| 2303 | break; |
JiebingLi | 3211cbc | 2010-08-05 14:18:21 +0100 | [diff] [blame] | 2304 | default: |
| 2305 | rc = -EOPNOTSUPP; |
| 2306 | break; |
| 2307 | } |
| 2308 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2309 | if (!gadget_is_otg(&dev->gadget)) |
| 2310 | break; |
Alexander Shishkin | 28bd622 | 2011-12-21 10:19:39 +0200 | [diff] [blame] | 2311 | else if (setup->bRequest == USB_DEVICE_B_HNP_ENABLE) |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2312 | dev->gadget.b_hnp_enable = 1; |
Alexander Shishkin | 28bd622 | 2011-12-21 10:19:39 +0200 | [diff] [blame] | 2313 | else if (setup->bRequest == USB_DEVICE_A_HNP_SUPPORT) |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2314 | dev->gadget.a_hnp_support = 1; |
| 2315 | else if (setup->bRequest == |
| 2316 | USB_DEVICE_A_ALT_HNP_SUPPORT) |
| 2317 | dev->gadget.a_alt_hnp_support = 1; |
| 2318 | else |
| 2319 | break; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2320 | } else |
| 2321 | break; |
| 2322 | |
| 2323 | if (rc == 0) { |
| 2324 | if (prime_status_phase(dev, EP_DIR_IN)) |
| 2325 | ep0_stall(dev); |
| 2326 | } |
| 2327 | goto end; |
| 2328 | } |
| 2329 | |
| 2330 | case USB_REQ_GET_DESCRIPTOR: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2331 | dev_dbg(&dev->pdev->dev, |
| 2332 | "SETUP: USB_REQ_GET_DESCRIPTOR\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2333 | goto delegate; |
| 2334 | |
| 2335 | case USB_REQ_SET_DESCRIPTOR: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2336 | dev_dbg(&dev->pdev->dev, |
| 2337 | "SETUP: USB_REQ_SET_DESCRIPTOR unsupported\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2338 | goto delegate; |
| 2339 | |
| 2340 | case USB_REQ_GET_CONFIGURATION: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2341 | dev_dbg(&dev->pdev->dev, |
| 2342 | "SETUP: USB_REQ_GET_CONFIGURATION\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2343 | goto delegate; |
| 2344 | |
| 2345 | case USB_REQ_SET_CONFIGURATION: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2346 | dev_dbg(&dev->pdev->dev, |
| 2347 | "SETUP: USB_REQ_SET_CONFIGURATION\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2348 | goto delegate; |
| 2349 | |
| 2350 | case USB_REQ_GET_INTERFACE: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2351 | dev_dbg(&dev->pdev->dev, |
| 2352 | "SETUP: USB_REQ_GET_INTERFACE\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2353 | goto delegate; |
| 2354 | |
| 2355 | case USB_REQ_SET_INTERFACE: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2356 | dev_dbg(&dev->pdev->dev, |
| 2357 | "SETUP: USB_REQ_SET_INTERFACE\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2358 | goto delegate; |
| 2359 | |
| 2360 | case USB_REQ_SYNCH_FRAME: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2361 | dev_dbg(&dev->pdev->dev, |
| 2362 | "SETUP: USB_REQ_SYNCH_FRAME unsupported\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2363 | goto delegate; |
| 2364 | |
| 2365 | default: |
| 2366 | /* delegate USB standard requests to the gadget driver */ |
| 2367 | goto delegate; |
| 2368 | delegate: |
| 2369 | /* USB requests handled by gadget */ |
| 2370 | if (wLength) { |
| 2371 | /* DATA phase from gadget, STATUS phase from udc */ |
| 2372 | dev->ep0_dir = (setup->bRequestType & USB_DIR_IN) |
| 2373 | ? USB_DIR_IN : USB_DIR_OUT; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2374 | dev_vdbg(&dev->pdev->dev, |
| 2375 | "dev->ep0_dir = 0x%x, wLength = %d\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2376 | dev->ep0_dir, wLength); |
| 2377 | spin_unlock(&dev->lock); |
| 2378 | if (dev->driver->setup(&dev->gadget, |
| 2379 | &dev->local_setup_buff) < 0) |
| 2380 | ep0_stall(dev); |
| 2381 | spin_lock(&dev->lock); |
| 2382 | dev->ep0_state = (setup->bRequestType & USB_DIR_IN) |
| 2383 | ? DATA_STATE_XMIT : DATA_STATE_RECV; |
| 2384 | } else { |
| 2385 | /* no DATA phase, IN STATUS phase from gadget */ |
| 2386 | dev->ep0_dir = USB_DIR_IN; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2387 | dev_vdbg(&dev->pdev->dev, |
| 2388 | "dev->ep0_dir = 0x%x, wLength = %d\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2389 | dev->ep0_dir, wLength); |
| 2390 | spin_unlock(&dev->lock); |
| 2391 | if (dev->driver->setup(&dev->gadget, |
| 2392 | &dev->local_setup_buff) < 0) |
| 2393 | ep0_stall(dev); |
| 2394 | spin_lock(&dev->lock); |
| 2395 | dev->ep0_state = WAIT_FOR_OUT_STATUS; |
| 2396 | } |
| 2397 | break; |
| 2398 | } |
| 2399 | end: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2400 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2401 | } |
| 2402 | |
| 2403 | |
| 2404 | /* transfer completion, process endpoint request and free the completed dTDs |
| 2405 | * for this request |
| 2406 | */ |
| 2407 | static int process_ep_req(struct langwell_udc *dev, int index, |
| 2408 | struct langwell_request *curr_req) |
| 2409 | { |
| 2410 | struct langwell_dtd *curr_dtd; |
| 2411 | struct langwell_dqh *curr_dqh; |
| 2412 | int td_complete, actual, remaining_length; |
| 2413 | int i, dir; |
| 2414 | u8 dtd_status = 0; |
| 2415 | int retval = 0; |
| 2416 | |
| 2417 | curr_dqh = &dev->ep_dqh[index]; |
| 2418 | dir = index % 2; |
| 2419 | |
| 2420 | curr_dtd = curr_req->head; |
| 2421 | td_complete = 0; |
| 2422 | actual = curr_req->req.length; |
| 2423 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2424 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2425 | |
| 2426 | for (i = 0; i < curr_req->dtd_count; i++) { |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2427 | |
| 2428 | /* command execution states by dTD */ |
| 2429 | dtd_status = curr_dtd->dtd_status; |
| 2430 | |
Christophe Lebouc | c8458d5 | 2010-09-30 15:34:36 +0100 | [diff] [blame] | 2431 | barrier(); |
| 2432 | remaining_length = le16_to_cpu(curr_dtd->dtd_total); |
| 2433 | actual -= remaining_length; |
| 2434 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2435 | if (!dtd_status) { |
| 2436 | /* transfers completed successfully */ |
| 2437 | if (!remaining_length) { |
| 2438 | td_complete++; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2439 | dev_vdbg(&dev->pdev->dev, |
| 2440 | "dTD transmitted successfully\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2441 | } else { |
| 2442 | if (dir) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2443 | dev_vdbg(&dev->pdev->dev, |
| 2444 | "TX dTD remains data\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2445 | retval = -EPROTO; |
| 2446 | break; |
| 2447 | |
| 2448 | } else { |
| 2449 | td_complete++; |
| 2450 | break; |
| 2451 | } |
| 2452 | } |
| 2453 | } else { |
| 2454 | /* transfers completed with errors */ |
| 2455 | if (dtd_status & DTD_STS_ACTIVE) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2456 | dev_dbg(&dev->pdev->dev, |
| 2457 | "dTD status ACTIVE dQH[%d]\n", index); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2458 | retval = 1; |
| 2459 | return retval; |
| 2460 | } else if (dtd_status & DTD_STS_HALTED) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2461 | dev_err(&dev->pdev->dev, |
| 2462 | "dTD error %08x dQH[%d]\n", |
| 2463 | dtd_status, index); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2464 | /* clear the errors and halt condition */ |
| 2465 | curr_dqh->dtd_status = 0; |
| 2466 | retval = -EPIPE; |
| 2467 | break; |
| 2468 | } else if (dtd_status & DTD_STS_DBE) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2469 | dev_dbg(&dev->pdev->dev, |
| 2470 | "data buffer (overflow) error\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2471 | retval = -EPROTO; |
| 2472 | break; |
| 2473 | } else if (dtd_status & DTD_STS_TRE) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2474 | dev_dbg(&dev->pdev->dev, |
| 2475 | "transaction(ISO) error\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2476 | retval = -EILSEQ; |
| 2477 | break; |
| 2478 | } else |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2479 | dev_err(&dev->pdev->dev, |
| 2480 | "unknown error (0x%x)!\n", |
| 2481 | dtd_status); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2482 | } |
| 2483 | |
| 2484 | if (i != curr_req->dtd_count - 1) |
| 2485 | curr_dtd = (struct langwell_dtd *) |
| 2486 | curr_dtd->next_dtd_virt; |
| 2487 | } |
| 2488 | |
| 2489 | if (retval) |
| 2490 | return retval; |
| 2491 | |
| 2492 | curr_req->req.actual = actual; |
| 2493 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2494 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2495 | return 0; |
| 2496 | } |
| 2497 | |
| 2498 | |
| 2499 | /* complete DATA or STATUS phase of ep0 prime status phase if needed */ |
| 2500 | static void ep0_req_complete(struct langwell_udc *dev, |
| 2501 | struct langwell_ep *ep0, struct langwell_request *req) |
| 2502 | { |
| 2503 | u32 new_addr; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2504 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2505 | |
| 2506 | if (dev->usb_state == USB_STATE_ADDRESS) { |
| 2507 | /* set the new address */ |
| 2508 | new_addr = (u32)dev->dev_addr; |
| 2509 | writel(new_addr << USBADR_SHIFT, &dev->op_regs->deviceaddr); |
| 2510 | |
| 2511 | new_addr = USBADR(readl(&dev->op_regs->deviceaddr)); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2512 | dev_vdbg(&dev->pdev->dev, "new_addr = %d\n", new_addr); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2513 | } |
| 2514 | |
| 2515 | done(ep0, req, 0); |
| 2516 | |
| 2517 | switch (dev->ep0_state) { |
| 2518 | case DATA_STATE_XMIT: |
| 2519 | /* receive status phase */ |
| 2520 | if (prime_status_phase(dev, EP_DIR_OUT)) |
| 2521 | ep0_stall(dev); |
| 2522 | break; |
| 2523 | case DATA_STATE_RECV: |
| 2524 | /* send status phase */ |
| 2525 | if (prime_status_phase(dev, EP_DIR_IN)) |
| 2526 | ep0_stall(dev); |
| 2527 | break; |
| 2528 | case WAIT_FOR_OUT_STATUS: |
| 2529 | dev->ep0_state = WAIT_FOR_SETUP; |
| 2530 | break; |
| 2531 | case WAIT_FOR_SETUP: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2532 | dev_err(&dev->pdev->dev, "unexpect ep0 packets\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2533 | break; |
| 2534 | default: |
| 2535 | ep0_stall(dev); |
| 2536 | break; |
| 2537 | } |
| 2538 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2539 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2540 | } |
| 2541 | |
| 2542 | |
| 2543 | /* USB transfer completion interrupt */ |
| 2544 | static void handle_trans_complete(struct langwell_udc *dev) |
| 2545 | { |
| 2546 | u32 complete_bits; |
| 2547 | int i, ep_num, dir, bit_mask, status; |
| 2548 | struct langwell_ep *epn; |
| 2549 | struct langwell_request *curr_req, *temp_req; |
| 2550 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2551 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2552 | |
| 2553 | complete_bits = readl(&dev->op_regs->endptcomplete); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2554 | dev_vdbg(&dev->pdev->dev, "endptcomplete register: 0x%08x\n", |
| 2555 | complete_bits); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2556 | |
| 2557 | /* Write-Clear the bits in endptcomplete register */ |
| 2558 | writel(complete_bits, &dev->op_regs->endptcomplete); |
| 2559 | |
| 2560 | if (!complete_bits) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2561 | dev_dbg(&dev->pdev->dev, "complete_bits = 0\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2562 | goto done; |
| 2563 | } |
| 2564 | |
| 2565 | for (i = 0; i < dev->ep_max; i++) { |
| 2566 | ep_num = i / 2; |
| 2567 | dir = i % 2; |
| 2568 | |
| 2569 | bit_mask = 1 << (ep_num + 16 * dir); |
| 2570 | |
| 2571 | if (!(complete_bits & bit_mask)) |
| 2572 | continue; |
| 2573 | |
| 2574 | /* ep0 */ |
| 2575 | if (i == 1) |
| 2576 | epn = &dev->ep[0]; |
| 2577 | else |
| 2578 | epn = &dev->ep[i]; |
| 2579 | |
| 2580 | if (epn->name == NULL) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2581 | dev_warn(&dev->pdev->dev, "invalid endpoint\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2582 | continue; |
| 2583 | } |
| 2584 | |
| 2585 | if (i < 2) |
| 2586 | /* ep0 in and out */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2587 | dev_dbg(&dev->pdev->dev, "%s-%s transfer completed\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2588 | epn->name, |
| 2589 | is_in(epn) ? "in" : "out"); |
| 2590 | else |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2591 | dev_dbg(&dev->pdev->dev, "%s transfer completed\n", |
| 2592 | epn->name); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2593 | |
| 2594 | /* process the req queue until an uncomplete request */ |
| 2595 | list_for_each_entry_safe(curr_req, temp_req, |
| 2596 | &epn->queue, queue) { |
| 2597 | status = process_ep_req(dev, i, curr_req); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2598 | dev_vdbg(&dev->pdev->dev, "%s req status: %d\n", |
| 2599 | epn->name, status); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2600 | |
| 2601 | if (status) |
| 2602 | break; |
| 2603 | |
| 2604 | /* write back status to req */ |
| 2605 | curr_req->req.status = status; |
| 2606 | |
| 2607 | /* ep0 request completion */ |
| 2608 | if (ep_num == 0) { |
| 2609 | ep0_req_complete(dev, epn, curr_req); |
| 2610 | break; |
| 2611 | } else { |
| 2612 | done(epn, curr_req, status); |
| 2613 | } |
| 2614 | } |
| 2615 | } |
| 2616 | done: |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2617 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2618 | } |
| 2619 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2620 | /* port change detect interrupt handler */ |
| 2621 | static void handle_port_change(struct langwell_udc *dev) |
| 2622 | { |
| 2623 | u32 portsc1, devlc; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2624 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2625 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2626 | |
| 2627 | if (dev->bus_reset) |
| 2628 | dev->bus_reset = 0; |
| 2629 | |
| 2630 | portsc1 = readl(&dev->op_regs->portsc1); |
| 2631 | devlc = readl(&dev->op_regs->devlc); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2632 | dev_vdbg(&dev->pdev->dev, "portsc1 = 0x%08x, devlc = 0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2633 | portsc1, devlc); |
| 2634 | |
| 2635 | /* bus reset is finished */ |
| 2636 | if (!(portsc1 & PORTS_PR)) { |
| 2637 | /* get the speed */ |
Michal Nazarewicz | e538dfd | 2011-08-30 17:11:19 +0200 | [diff] [blame] | 2638 | dev->gadget.speed = lpm_device_speed(devlc); |
| 2639 | dev_vdbg(&dev->pdev->dev, "dev->gadget.speed = %d\n", |
| 2640 | dev->gadget.speed); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2641 | } |
| 2642 | |
| 2643 | /* LPM L0 to L1 */ |
| 2644 | if (dev->lpm && dev->lpm_state == LPM_L0) |
| 2645 | if (portsc1 & PORTS_SUSP && portsc1 & PORTS_SLP) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2646 | dev_info(&dev->pdev->dev, "LPM L0 to L1\n"); |
| 2647 | dev->lpm_state = LPM_L1; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2648 | } |
| 2649 | |
| 2650 | /* LPM L1 to L0, force resume or remote wakeup finished */ |
| 2651 | if (dev->lpm && dev->lpm_state == LPM_L1) |
| 2652 | if (!(portsc1 & PORTS_SUSP)) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2653 | dev_info(&dev->pdev->dev, "LPM L1 to L0\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2654 | dev->lpm_state = LPM_L0; |
| 2655 | } |
| 2656 | |
| 2657 | /* update USB state */ |
| 2658 | if (!dev->resume_state) |
| 2659 | dev->usb_state = USB_STATE_DEFAULT; |
| 2660 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2661 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2662 | } |
| 2663 | |
| 2664 | |
| 2665 | /* USB reset interrupt handler */ |
| 2666 | static void handle_usb_reset(struct langwell_udc *dev) |
| 2667 | { |
| 2668 | u32 deviceaddr, |
| 2669 | endptsetupstat, |
| 2670 | endptcomplete; |
| 2671 | unsigned long timeout; |
| 2672 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2673 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2674 | |
| 2675 | /* Write-Clear the device address */ |
| 2676 | deviceaddr = readl(&dev->op_regs->deviceaddr); |
| 2677 | writel(deviceaddr & ~USBADR_MASK, &dev->op_regs->deviceaddr); |
| 2678 | |
| 2679 | dev->dev_addr = 0; |
| 2680 | |
| 2681 | /* clear usb state */ |
| 2682 | dev->resume_state = 0; |
| 2683 | |
| 2684 | /* LPM L1 to L0, reset */ |
| 2685 | if (dev->lpm) |
| 2686 | dev->lpm_state = LPM_L0; |
| 2687 | |
| 2688 | dev->ep0_dir = USB_DIR_OUT; |
| 2689 | dev->ep0_state = WAIT_FOR_SETUP; |
JiebingLi | 3211cbc | 2010-08-05 14:18:21 +0100 | [diff] [blame] | 2690 | |
| 2691 | /* remote wakeup reset to 0 when the device is reset */ |
| 2692 | dev->remote_wakeup = 0; |
| 2693 | dev->dev_status = 1 << USB_DEVICE_SELF_POWERED; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2694 | dev->gadget.b_hnp_enable = 0; |
| 2695 | dev->gadget.a_hnp_support = 0; |
| 2696 | dev->gadget.a_alt_hnp_support = 0; |
| 2697 | |
| 2698 | /* Write-Clear all the setup token semaphores */ |
| 2699 | endptsetupstat = readl(&dev->op_regs->endptsetupstat); |
| 2700 | writel(endptsetupstat, &dev->op_regs->endptsetupstat); |
| 2701 | |
| 2702 | /* Write-Clear all the endpoint complete status bits */ |
| 2703 | endptcomplete = readl(&dev->op_regs->endptcomplete); |
| 2704 | writel(endptcomplete, &dev->op_regs->endptcomplete); |
| 2705 | |
| 2706 | /* wait until all endptprime bits cleared */ |
| 2707 | timeout = jiffies + PRIME_TIMEOUT; |
| 2708 | while (readl(&dev->op_regs->endptprime)) { |
| 2709 | if (time_after(jiffies, timeout)) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2710 | dev_err(&dev->pdev->dev, "USB reset timeout\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2711 | break; |
| 2712 | } |
| 2713 | cpu_relax(); |
| 2714 | } |
| 2715 | |
| 2716 | /* write 1s to endptflush register to clear any primed buffers */ |
| 2717 | writel((u32) ~0, &dev->op_regs->endptflush); |
| 2718 | |
| 2719 | if (readl(&dev->op_regs->portsc1) & PORTS_PR) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2720 | dev_vdbg(&dev->pdev->dev, "USB bus reset\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2721 | /* bus is reseting */ |
| 2722 | dev->bus_reset = 1; |
| 2723 | |
| 2724 | /* reset all the queues, stop all USB activities */ |
Alexander Shishkin | 37fd371 | 2011-12-21 10:19:40 +0200 | [diff] [blame] | 2725 | stop_activity(dev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2726 | dev->usb_state = USB_STATE_DEFAULT; |
| 2727 | } else { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2728 | dev_vdbg(&dev->pdev->dev, "device controller reset\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2729 | /* controller reset */ |
| 2730 | langwell_udc_reset(dev); |
| 2731 | |
| 2732 | /* reset all the queues, stop all USB activities */ |
Alexander Shishkin | 37fd371 | 2011-12-21 10:19:40 +0200 | [diff] [blame] | 2733 | stop_activity(dev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2734 | |
| 2735 | /* reset ep0 dQH and endptctrl */ |
| 2736 | ep0_reset(dev); |
| 2737 | |
| 2738 | /* enable interrupt and set controller to run state */ |
| 2739 | langwell_udc_start(dev); |
| 2740 | |
| 2741 | dev->usb_state = USB_STATE_ATTACHED; |
| 2742 | } |
| 2743 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2744 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2745 | } |
| 2746 | |
| 2747 | |
| 2748 | /* USB bus suspend/resume interrupt */ |
| 2749 | static void handle_bus_suspend(struct langwell_udc *dev) |
| 2750 | { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2751 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2752 | |
| 2753 | dev->resume_state = dev->usb_state; |
| 2754 | dev->usb_state = USB_STATE_SUSPENDED; |
| 2755 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2756 | /* report suspend to the driver */ |
| 2757 | if (dev->driver) { |
| 2758 | if (dev->driver->suspend) { |
| 2759 | spin_unlock(&dev->lock); |
| 2760 | dev->driver->suspend(&dev->gadget); |
| 2761 | spin_lock(&dev->lock); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2762 | dev_dbg(&dev->pdev->dev, "suspend %s\n", |
| 2763 | dev->driver->driver.name); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2764 | } |
| 2765 | } |
| 2766 | |
| 2767 | /* enter PHY low power suspend */ |
JiebingLi | 513b91b | 2010-08-05 14:18:13 +0100 | [diff] [blame] | 2768 | if (dev->pdev->device != 0x0829) |
| 2769 | langwell_phy_low_power(dev, 0); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2770 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2771 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2772 | } |
| 2773 | |
| 2774 | |
| 2775 | static void handle_bus_resume(struct langwell_udc *dev) |
| 2776 | { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2777 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2778 | |
| 2779 | dev->usb_state = dev->resume_state; |
| 2780 | dev->resume_state = 0; |
| 2781 | |
| 2782 | /* exit PHY low power suspend */ |
JiebingLi | 513b91b | 2010-08-05 14:18:13 +0100 | [diff] [blame] | 2783 | if (dev->pdev->device != 0x0829) |
| 2784 | langwell_phy_low_power(dev, 0); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2785 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2786 | /* report resume to the driver */ |
| 2787 | if (dev->driver) { |
| 2788 | if (dev->driver->resume) { |
| 2789 | spin_unlock(&dev->lock); |
| 2790 | dev->driver->resume(&dev->gadget); |
| 2791 | spin_lock(&dev->lock); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2792 | dev_dbg(&dev->pdev->dev, "resume %s\n", |
| 2793 | dev->driver->driver.name); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2794 | } |
| 2795 | } |
| 2796 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2797 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2798 | } |
| 2799 | |
| 2800 | |
| 2801 | /* USB device controller interrupt handler */ |
| 2802 | static irqreturn_t langwell_irq(int irq, void *_dev) |
| 2803 | { |
| 2804 | struct langwell_udc *dev = _dev; |
| 2805 | u32 usbsts, |
| 2806 | usbintr, |
| 2807 | irq_sts, |
| 2808 | portsc1; |
| 2809 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2810 | dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2811 | |
| 2812 | if (dev->stopped) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2813 | dev_vdbg(&dev->pdev->dev, "handle IRQ_NONE\n"); |
| 2814 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2815 | return IRQ_NONE; |
| 2816 | } |
| 2817 | |
| 2818 | spin_lock(&dev->lock); |
| 2819 | |
| 2820 | /* USB status */ |
| 2821 | usbsts = readl(&dev->op_regs->usbsts); |
| 2822 | |
| 2823 | /* USB interrupt enable */ |
| 2824 | usbintr = readl(&dev->op_regs->usbintr); |
| 2825 | |
| 2826 | irq_sts = usbsts & usbintr; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2827 | dev_vdbg(&dev->pdev->dev, |
| 2828 | "usbsts = 0x%08x, usbintr = 0x%08x, irq_sts = 0x%08x\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2829 | usbsts, usbintr, irq_sts); |
| 2830 | |
| 2831 | if (!irq_sts) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2832 | dev_vdbg(&dev->pdev->dev, "handle IRQ_NONE\n"); |
| 2833 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2834 | spin_unlock(&dev->lock); |
| 2835 | return IRQ_NONE; |
| 2836 | } |
| 2837 | |
| 2838 | /* Write-Clear interrupt status bits */ |
| 2839 | writel(irq_sts, &dev->op_regs->usbsts); |
| 2840 | |
| 2841 | /* resume from suspend */ |
| 2842 | portsc1 = readl(&dev->op_regs->portsc1); |
| 2843 | if (dev->usb_state == USB_STATE_SUSPENDED) |
| 2844 | if (!(portsc1 & PORTS_SUSP)) |
| 2845 | handle_bus_resume(dev); |
| 2846 | |
| 2847 | /* USB interrupt */ |
| 2848 | if (irq_sts & STS_UI) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2849 | dev_vdbg(&dev->pdev->dev, "USB interrupt\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2850 | |
| 2851 | /* setup packet received from ep0 */ |
| 2852 | if (readl(&dev->op_regs->endptsetupstat) |
| 2853 | & EP0SETUPSTAT_MASK) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2854 | dev_vdbg(&dev->pdev->dev, |
| 2855 | "USB SETUP packet received interrupt\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2856 | /* setup tripwire semaphone */ |
| 2857 | setup_tripwire(dev); |
| 2858 | handle_setup_packet(dev, &dev->local_setup_buff); |
| 2859 | } |
| 2860 | |
| 2861 | /* USB transfer completion */ |
| 2862 | if (readl(&dev->op_regs->endptcomplete)) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2863 | dev_vdbg(&dev->pdev->dev, |
| 2864 | "USB transfer completion interrupt\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2865 | handle_trans_complete(dev); |
| 2866 | } |
| 2867 | } |
| 2868 | |
| 2869 | /* SOF received interrupt (for ISO transfer) */ |
| 2870 | if (irq_sts & STS_SRI) { |
| 2871 | /* FIXME */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2872 | /* dev_vdbg(&dev->pdev->dev, "SOF received interrupt\n"); */ |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2873 | } |
| 2874 | |
| 2875 | /* port change detect interrupt */ |
| 2876 | if (irq_sts & STS_PCI) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2877 | dev_vdbg(&dev->pdev->dev, "port change detect interrupt\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2878 | handle_port_change(dev); |
| 2879 | } |
| 2880 | |
Vitaliy Ivanov | fb914eb | 2011-06-23 20:01:55 +0300 | [diff] [blame] | 2881 | /* suspend interrupt */ |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2882 | if (irq_sts & STS_SLI) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2883 | dev_vdbg(&dev->pdev->dev, "suspend interrupt\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2884 | handle_bus_suspend(dev); |
| 2885 | } |
| 2886 | |
| 2887 | /* USB reset interrupt */ |
| 2888 | if (irq_sts & STS_URI) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2889 | dev_vdbg(&dev->pdev->dev, "USB reset interrupt\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2890 | handle_usb_reset(dev); |
| 2891 | } |
| 2892 | |
| 2893 | /* USB error or system error interrupt */ |
| 2894 | if (irq_sts & (STS_UEI | STS_SEI)) { |
| 2895 | /* FIXME */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2896 | dev_warn(&dev->pdev->dev, "error IRQ, irq_sts: %x\n", irq_sts); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2897 | } |
| 2898 | |
| 2899 | spin_unlock(&dev->lock); |
| 2900 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2901 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2902 | return IRQ_HANDLED; |
| 2903 | } |
| 2904 | |
| 2905 | |
| 2906 | /*-------------------------------------------------------------------------*/ |
| 2907 | |
| 2908 | /* release device structure */ |
| 2909 | static void gadget_release(struct device *_dev) |
| 2910 | { |
Felipe Balbi | 5bc639f | 2011-10-08 13:08:01 +0300 | [diff] [blame] | 2911 | struct langwell_udc *dev = dev_get_drvdata(_dev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2912 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2913 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2914 | |
| 2915 | complete(dev->done); |
| 2916 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2917 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2918 | kfree(dev); |
| 2919 | } |
| 2920 | |
| 2921 | |
JiebingLi | 912c93d | 2010-08-05 14:18:29 +0100 | [diff] [blame] | 2922 | /* enable SRAM caching if SRAM detected */ |
| 2923 | static void sram_init(struct langwell_udc *dev) |
| 2924 | { |
| 2925 | struct pci_dev *pdev = dev->pdev; |
| 2926 | |
| 2927 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| 2928 | |
| 2929 | dev->sram_addr = pci_resource_start(pdev, 1); |
| 2930 | dev->sram_size = pci_resource_len(pdev, 1); |
| 2931 | dev_info(&dev->pdev->dev, "Found private SRAM at %x size:%x\n", |
| 2932 | dev->sram_addr, dev->sram_size); |
| 2933 | dev->got_sram = 1; |
| 2934 | |
| 2935 | if (pci_request_region(pdev, 1, kobject_name(&pdev->dev.kobj))) { |
| 2936 | dev_warn(&dev->pdev->dev, "SRAM request failed\n"); |
| 2937 | dev->got_sram = 0; |
| 2938 | } else if (!dma_declare_coherent_memory(&pdev->dev, dev->sram_addr, |
| 2939 | dev->sram_addr, dev->sram_size, DMA_MEMORY_MAP)) { |
| 2940 | dev_warn(&dev->pdev->dev, "SRAM DMA declare failed\n"); |
| 2941 | pci_release_region(pdev, 1); |
| 2942 | dev->got_sram = 0; |
| 2943 | } |
| 2944 | |
| 2945 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| 2946 | } |
| 2947 | |
| 2948 | |
| 2949 | /* release SRAM caching */ |
| 2950 | static void sram_deinit(struct langwell_udc *dev) |
| 2951 | { |
| 2952 | struct pci_dev *pdev = dev->pdev; |
| 2953 | |
| 2954 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
| 2955 | |
| 2956 | dma_release_declared_memory(&pdev->dev); |
| 2957 | pci_release_region(pdev, 1); |
| 2958 | |
| 2959 | dev->got_sram = 0; |
| 2960 | |
| 2961 | dev_info(&dev->pdev->dev, "release SRAM caching\n"); |
| 2962 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
| 2963 | } |
| 2964 | |
| 2965 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2966 | /* tear down the binding between this driver and the pci device */ |
| 2967 | static void langwell_udc_remove(struct pci_dev *pdev) |
| 2968 | { |
Felipe Balbi | 5bc639f | 2011-10-08 13:08:01 +0300 | [diff] [blame] | 2969 | struct langwell_udc *dev = pci_get_drvdata(pdev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2970 | |
| 2971 | DECLARE_COMPLETION(done); |
| 2972 | |
| 2973 | BUG_ON(dev->driver); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 2974 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2975 | |
| 2976 | dev->done = &done; |
| 2977 | |
JiebingLi | 912c93d | 2010-08-05 14:18:29 +0100 | [diff] [blame] | 2978 | /* free dTD dma_pool and dQH */ |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2979 | if (dev->dtd_pool) |
| 2980 | dma_pool_destroy(dev->dtd_pool); |
| 2981 | |
JiebingLi | 912c93d | 2010-08-05 14:18:29 +0100 | [diff] [blame] | 2982 | if (dev->ep_dqh) |
| 2983 | dma_free_coherent(&pdev->dev, dev->ep_dqh_size, |
| 2984 | dev->ep_dqh, dev->ep_dqh_dma); |
| 2985 | |
| 2986 | /* release SRAM caching */ |
| 2987 | if (dev->has_sram && dev->got_sram) |
| 2988 | sram_deinit(dev); |
JiebingLi | 912c93d | 2010-08-05 14:18:29 +0100 | [diff] [blame] | 2989 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2990 | if (dev->status_req) { |
| 2991 | kfree(dev->status_req->req.buf); |
| 2992 | kfree(dev->status_req); |
| 2993 | } |
| 2994 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2995 | kfree(dev->ep); |
| 2996 | |
Justin P. Mattock | 48e34d0 | 2010-12-30 15:07:58 -0800 | [diff] [blame] | 2997 | /* disable IRQ handler */ |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 2998 | if (dev->got_irq) |
| 2999 | free_irq(pdev->irq, dev); |
| 3000 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3001 | if (dev->cap_regs) |
| 3002 | iounmap(dev->cap_regs); |
| 3003 | |
| 3004 | if (dev->region) |
| 3005 | release_mem_region(pci_resource_start(pdev, 0), |
| 3006 | pci_resource_len(pdev, 0)); |
| 3007 | |
| 3008 | if (dev->enabled) |
| 3009 | pci_disable_device(pdev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3010 | |
| 3011 | dev->cap_regs = NULL; |
| 3012 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3013 | dev_info(&dev->pdev->dev, "unbind\n"); |
| 3014 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3015 | |
| 3016 | device_unregister(&dev->gadget.dev); |
| 3017 | device_remove_file(&pdev->dev, &dev_attr_langwell_udc); |
JiebingLi | 3211cbc | 2010-08-05 14:18:21 +0100 | [diff] [blame] | 3018 | device_remove_file(&pdev->dev, &dev_attr_remote_wakeup); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3019 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3020 | pci_set_drvdata(pdev, NULL); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3021 | |
| 3022 | /* free dev, wait for the release() finished */ |
| 3023 | wait_for_completion(&done); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3024 | } |
| 3025 | |
| 3026 | |
| 3027 | /* |
| 3028 | * wrap this driver around the specified device, but |
| 3029 | * don't respond over USB until a gadget driver binds to us. |
| 3030 | */ |
| 3031 | static int langwell_udc_probe(struct pci_dev *pdev, |
| 3032 | const struct pci_device_id *id) |
| 3033 | { |
| 3034 | struct langwell_udc *dev; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3035 | unsigned long resource, len; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3036 | void __iomem *base = NULL; |
| 3037 | size_t size; |
| 3038 | int retval; |
| 3039 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3040 | /* alloc, and start init */ |
| 3041 | dev = kzalloc(sizeof *dev, GFP_KERNEL); |
| 3042 | if (dev == NULL) { |
| 3043 | retval = -ENOMEM; |
| 3044 | goto error; |
| 3045 | } |
| 3046 | |
| 3047 | /* initialize device spinlock */ |
| 3048 | spin_lock_init(&dev->lock); |
| 3049 | |
| 3050 | dev->pdev = pdev; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3051 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3052 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3053 | pci_set_drvdata(pdev, dev); |
| 3054 | |
| 3055 | /* now all the pci goodies ... */ |
| 3056 | if (pci_enable_device(pdev) < 0) { |
| 3057 | retval = -ENODEV; |
| 3058 | goto error; |
| 3059 | } |
| 3060 | dev->enabled = 1; |
| 3061 | |
| 3062 | /* control register: BAR 0 */ |
| 3063 | resource = pci_resource_start(pdev, 0); |
| 3064 | len = pci_resource_len(pdev, 0); |
| 3065 | if (!request_mem_region(resource, len, driver_name)) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3066 | dev_err(&dev->pdev->dev, "controller already in use\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3067 | retval = -EBUSY; |
| 3068 | goto error; |
| 3069 | } |
| 3070 | dev->region = 1; |
| 3071 | |
| 3072 | base = ioremap_nocache(resource, len); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3073 | if (base == NULL) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3074 | dev_err(&dev->pdev->dev, "can't map memory\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3075 | retval = -EFAULT; |
| 3076 | goto error; |
| 3077 | } |
| 3078 | |
| 3079 | dev->cap_regs = (struct langwell_cap_regs __iomem *) base; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3080 | dev_vdbg(&dev->pdev->dev, "dev->cap_regs: %p\n", dev->cap_regs); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3081 | dev->op_regs = (struct langwell_op_regs __iomem *) |
| 3082 | (base + OP_REG_OFFSET); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3083 | dev_vdbg(&dev->pdev->dev, "dev->op_regs: %p\n", dev->op_regs); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3084 | |
| 3085 | /* irq setup after old hardware is cleaned up */ |
| 3086 | if (!pdev->irq) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3087 | dev_err(&dev->pdev->dev, "No IRQ. Check PCI setup!\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3088 | retval = -ENODEV; |
| 3089 | goto error; |
| 3090 | } |
| 3091 | |
JiebingLi | 912c93d | 2010-08-05 14:18:29 +0100 | [diff] [blame] | 3092 | dev->has_sram = 1; |
| 3093 | dev->got_sram = 0; |
| 3094 | dev_vdbg(&dev->pdev->dev, "dev->has_sram: %d\n", dev->has_sram); |
| 3095 | |
JiebingLi | 912c93d | 2010-08-05 14:18:29 +0100 | [diff] [blame] | 3096 | /* enable SRAM caching if detected */ |
| 3097 | if (dev->has_sram && !dev->got_sram) |
| 3098 | sram_init(dev); |
| 3099 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3100 | dev_info(&dev->pdev->dev, |
| 3101 | "irq %d, io mem: 0x%08lx, len: 0x%08lx, pci mem 0x%p\n", |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3102 | pdev->irq, resource, len, base); |
| 3103 | /* enables bus-mastering for device dev */ |
| 3104 | pci_set_master(pdev); |
| 3105 | |
| 3106 | if (request_irq(pdev->irq, langwell_irq, IRQF_SHARED, |
| 3107 | driver_name, dev) != 0) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3108 | dev_err(&dev->pdev->dev, |
| 3109 | "request interrupt %d failed\n", pdev->irq); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3110 | retval = -EBUSY; |
| 3111 | goto error; |
| 3112 | } |
| 3113 | dev->got_irq = 1; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3114 | |
| 3115 | /* set stopped bit */ |
| 3116 | dev->stopped = 1; |
| 3117 | |
| 3118 | /* capabilities and endpoint number */ |
| 3119 | dev->lpm = (readl(&dev->cap_regs->hccparams) & HCC_LEN) ? 1 : 0; |
| 3120 | dev->dciversion = readw(&dev->cap_regs->dciversion); |
| 3121 | dev->devcap = (readl(&dev->cap_regs->dccparams) & DEVCAP) ? 1 : 0; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3122 | dev_vdbg(&dev->pdev->dev, "dev->lpm: %d\n", dev->lpm); |
| 3123 | dev_vdbg(&dev->pdev->dev, "dev->dciversion: 0x%04x\n", |
| 3124 | dev->dciversion); |
| 3125 | dev_vdbg(&dev->pdev->dev, "dccparams: 0x%08x\n", |
| 3126 | readl(&dev->cap_regs->dccparams)); |
| 3127 | dev_vdbg(&dev->pdev->dev, "dev->devcap: %d\n", dev->devcap); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3128 | if (!dev->devcap) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3129 | dev_err(&dev->pdev->dev, "can't support device mode\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3130 | retval = -ENODEV; |
| 3131 | goto error; |
| 3132 | } |
| 3133 | |
| 3134 | /* a pair of endpoints (out/in) for each address */ |
| 3135 | dev->ep_max = DEN(readl(&dev->cap_regs->dccparams)) * 2; |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3136 | dev_vdbg(&dev->pdev->dev, "dev->ep_max: %d\n", dev->ep_max); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3137 | |
| 3138 | /* allocate endpoints memory */ |
| 3139 | dev->ep = kzalloc(sizeof(struct langwell_ep) * dev->ep_max, |
| 3140 | GFP_KERNEL); |
| 3141 | if (!dev->ep) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3142 | dev_err(&dev->pdev->dev, "allocate endpoints memory failed\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3143 | retval = -ENOMEM; |
| 3144 | goto error; |
| 3145 | } |
| 3146 | |
| 3147 | /* allocate device dQH memory */ |
| 3148 | size = dev->ep_max * sizeof(struct langwell_dqh); |
Felipe Balbi | b9af9ea | 2011-07-04 11:12:32 +0300 | [diff] [blame] | 3149 | dev_vdbg(&dev->pdev->dev, "orig size = %zd\n", size); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3150 | if (size < DQH_ALIGNMENT) |
| 3151 | size = DQH_ALIGNMENT; |
| 3152 | else if ((size % DQH_ALIGNMENT) != 0) { |
| 3153 | size += DQH_ALIGNMENT + 1; |
| 3154 | size &= ~(DQH_ALIGNMENT - 1); |
| 3155 | } |
| 3156 | dev->ep_dqh = dma_alloc_coherent(&pdev->dev, size, |
| 3157 | &dev->ep_dqh_dma, GFP_KERNEL); |
| 3158 | if (!dev->ep_dqh) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3159 | dev_err(&dev->pdev->dev, "allocate dQH memory failed\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3160 | retval = -ENOMEM; |
| 3161 | goto error; |
| 3162 | } |
| 3163 | dev->ep_dqh_size = size; |
Felipe Balbi | b9af9ea | 2011-07-04 11:12:32 +0300 | [diff] [blame] | 3164 | dev_vdbg(&dev->pdev->dev, "ep_dqh_size = %zd\n", dev->ep_dqh_size); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3165 | |
| 3166 | /* initialize ep0 status request structure */ |
| 3167 | dev->status_req = kzalloc(sizeof(struct langwell_request), GFP_KERNEL); |
| 3168 | if (!dev->status_req) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3169 | dev_err(&dev->pdev->dev, |
| 3170 | "allocate status_req memory failed\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3171 | retval = -ENOMEM; |
| 3172 | goto error; |
| 3173 | } |
| 3174 | INIT_LIST_HEAD(&dev->status_req->queue); |
| 3175 | |
| 3176 | /* allocate a small amount of memory to get valid address */ |
| 3177 | dev->status_req->req.buf = kmalloc(8, GFP_KERNEL); |
| 3178 | dev->status_req->req.dma = virt_to_phys(dev->status_req->req.buf); |
| 3179 | |
| 3180 | dev->resume_state = USB_STATE_NOTATTACHED; |
| 3181 | dev->usb_state = USB_STATE_POWERED; |
| 3182 | dev->ep0_dir = USB_DIR_OUT; |
JiebingLi | 3211cbc | 2010-08-05 14:18:21 +0100 | [diff] [blame] | 3183 | |
| 3184 | /* remote wakeup reset to 0 when the device is reset */ |
| 3185 | dev->remote_wakeup = 0; |
| 3186 | dev->dev_status = 1 << USB_DEVICE_SELF_POWERED; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3187 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3188 | /* reset device controller */ |
| 3189 | langwell_udc_reset(dev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3190 | |
| 3191 | /* initialize gadget structure */ |
| 3192 | dev->gadget.ops = &langwell_ops; /* usb_gadget_ops */ |
| 3193 | dev->gadget.ep0 = &dev->ep[0].ep; /* gadget ep0 */ |
| 3194 | INIT_LIST_HEAD(&dev->gadget.ep_list); /* ep_list */ |
| 3195 | dev->gadget.speed = USB_SPEED_UNKNOWN; /* speed */ |
Michal Nazarewicz | d327ab5 | 2011-11-19 18:27:37 +0100 | [diff] [blame] | 3196 | dev->gadget.max_speed = USB_SPEED_HIGH; /* support dual speed */ |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3197 | |
| 3198 | /* the "gadget" abstracts/virtualizes the controller */ |
| 3199 | dev_set_name(&dev->gadget.dev, "gadget"); |
| 3200 | dev->gadget.dev.parent = &pdev->dev; |
| 3201 | dev->gadget.dev.dma_mask = pdev->dev.dma_mask; |
| 3202 | dev->gadget.dev.release = gadget_release; |
| 3203 | dev->gadget.name = driver_name; /* gadget name */ |
| 3204 | |
| 3205 | /* controller endpoints reinit */ |
| 3206 | eps_reinit(dev); |
| 3207 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3208 | /* reset ep0 dQH and endptctrl */ |
| 3209 | ep0_reset(dev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3210 | |
| 3211 | /* create dTD dma_pool resource */ |
| 3212 | dev->dtd_pool = dma_pool_create("langwell_dtd", |
| 3213 | &dev->pdev->dev, |
| 3214 | sizeof(struct langwell_dtd), |
| 3215 | DTD_ALIGNMENT, |
| 3216 | DMA_BOUNDARY); |
| 3217 | |
| 3218 | if (!dev->dtd_pool) { |
| 3219 | retval = -ENOMEM; |
| 3220 | goto error; |
| 3221 | } |
| 3222 | |
| 3223 | /* done */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3224 | dev_info(&dev->pdev->dev, "%s\n", driver_desc); |
| 3225 | dev_info(&dev->pdev->dev, "irq %d, pci mem %p\n", pdev->irq, base); |
| 3226 | dev_info(&dev->pdev->dev, "Driver version: " DRIVER_VERSION "\n"); |
| 3227 | dev_info(&dev->pdev->dev, "Support (max) %d endpoints\n", dev->ep_max); |
| 3228 | dev_info(&dev->pdev->dev, "Device interface version: 0x%04x\n", |
| 3229 | dev->dciversion); |
| 3230 | dev_info(&dev->pdev->dev, "Controller mode: %s\n", |
| 3231 | dev->devcap ? "Device" : "Host"); |
| 3232 | dev_info(&dev->pdev->dev, "Support USB LPM: %s\n", |
| 3233 | dev->lpm ? "Yes" : "No"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3234 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3235 | dev_vdbg(&dev->pdev->dev, |
| 3236 | "After langwell_udc_probe(), print all registers:\n"); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3237 | print_all_registers(dev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3238 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3239 | retval = device_register(&dev->gadget.dev); |
| 3240 | if (retval) |
| 3241 | goto error; |
| 3242 | |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 3243 | retval = usb_add_gadget_udc(&pdev->dev, &dev->gadget); |
| 3244 | if (retval) |
| 3245 | goto error; |
| 3246 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3247 | retval = device_create_file(&pdev->dev, &dev_attr_langwell_udc); |
| 3248 | if (retval) |
| 3249 | goto error; |
| 3250 | |
JiebingLi | 3211cbc | 2010-08-05 14:18:21 +0100 | [diff] [blame] | 3251 | retval = device_create_file(&pdev->dev, &dev_attr_remote_wakeup); |
| 3252 | if (retval) |
| 3253 | goto error_attr1; |
| 3254 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3255 | dev_vdbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3256 | return 0; |
| 3257 | |
JiebingLi | 3211cbc | 2010-08-05 14:18:21 +0100 | [diff] [blame] | 3258 | error_attr1: |
| 3259 | device_remove_file(&pdev->dev, &dev_attr_langwell_udc); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3260 | error: |
| 3261 | if (dev) { |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3262 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3263 | langwell_udc_remove(pdev); |
| 3264 | } |
| 3265 | |
| 3266 | return retval; |
| 3267 | } |
| 3268 | |
| 3269 | |
| 3270 | /* device controller suspend */ |
| 3271 | static int langwell_udc_suspend(struct pci_dev *pdev, pm_message_t state) |
| 3272 | { |
Felipe Balbi | 5bc639f | 2011-10-08 13:08:01 +0300 | [diff] [blame] | 3273 | struct langwell_udc *dev = pci_get_drvdata(pdev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3274 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3275 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3276 | |
Sebastian Andrzej Siewior | 0f91349 | 2011-06-28 16:33:47 +0300 | [diff] [blame] | 3277 | usb_del_gadget_udc(&dev->gadget); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3278 | /* disable interrupt and set controller to stop state */ |
| 3279 | langwell_udc_stop(dev); |
| 3280 | |
Justin P. Mattock | 48e34d0 | 2010-12-30 15:07:58 -0800 | [diff] [blame] | 3281 | /* disable IRQ handler */ |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3282 | if (dev->got_irq) |
| 3283 | free_irq(pdev->irq, dev); |
| 3284 | dev->got_irq = 0; |
| 3285 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3286 | /* save PCI state */ |
| 3287 | pci_save_state(pdev); |
| 3288 | |
Philippe Skowronski | cf7d3c8 | 2010-10-01 14:59:16 +0100 | [diff] [blame] | 3289 | spin_lock_irq(&dev->lock); |
| 3290 | /* stop all usb activities */ |
Alexander Shishkin | 37fd371 | 2011-12-21 10:19:40 +0200 | [diff] [blame] | 3291 | stop_activity(dev); |
Philippe Skowronski | cf7d3c8 | 2010-10-01 14:59:16 +0100 | [diff] [blame] | 3292 | spin_unlock_irq(&dev->lock); |
| 3293 | |
JiebingLi | 912c93d | 2010-08-05 14:18:29 +0100 | [diff] [blame] | 3294 | /* free dTD dma_pool and dQH */ |
| 3295 | if (dev->dtd_pool) |
| 3296 | dma_pool_destroy(dev->dtd_pool); |
| 3297 | |
| 3298 | if (dev->ep_dqh) |
| 3299 | dma_free_coherent(&pdev->dev, dev->ep_dqh_size, |
| 3300 | dev->ep_dqh, dev->ep_dqh_dma); |
| 3301 | |
| 3302 | /* release SRAM caching */ |
| 3303 | if (dev->has_sram && dev->got_sram) |
| 3304 | sram_deinit(dev); |
| 3305 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3306 | /* set device power state */ |
| 3307 | pci_set_power_state(pdev, PCI_D3hot); |
| 3308 | |
| 3309 | /* enter PHY low power suspend */ |
JiebingLi | 513b91b | 2010-08-05 14:18:13 +0100 | [diff] [blame] | 3310 | if (dev->pdev->device != 0x0829) |
| 3311 | langwell_phy_low_power(dev, 1); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3312 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3313 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3314 | return 0; |
| 3315 | } |
| 3316 | |
| 3317 | |
| 3318 | /* device controller resume */ |
| 3319 | static int langwell_udc_resume(struct pci_dev *pdev) |
| 3320 | { |
Felipe Balbi | 5bc639f | 2011-10-08 13:08:01 +0300 | [diff] [blame] | 3321 | struct langwell_udc *dev = pci_get_drvdata(pdev); |
JiebingLi | 912c93d | 2010-08-05 14:18:29 +0100 | [diff] [blame] | 3322 | size_t size; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3323 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3324 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3325 | |
| 3326 | /* exit PHY low power suspend */ |
JiebingLi | 513b91b | 2010-08-05 14:18:13 +0100 | [diff] [blame] | 3327 | if (dev->pdev->device != 0x0829) |
| 3328 | langwell_phy_low_power(dev, 0); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3329 | |
| 3330 | /* set device D0 power state */ |
| 3331 | pci_set_power_state(pdev, PCI_D0); |
| 3332 | |
JiebingLi | 912c93d | 2010-08-05 14:18:29 +0100 | [diff] [blame] | 3333 | /* enable SRAM caching if detected */ |
| 3334 | if (dev->has_sram && !dev->got_sram) |
| 3335 | sram_init(dev); |
| 3336 | |
| 3337 | /* allocate device dQH memory */ |
| 3338 | size = dev->ep_max * sizeof(struct langwell_dqh); |
Felipe Balbi | b9af9ea | 2011-07-04 11:12:32 +0300 | [diff] [blame] | 3339 | dev_vdbg(&dev->pdev->dev, "orig size = %zd\n", size); |
JiebingLi | 912c93d | 2010-08-05 14:18:29 +0100 | [diff] [blame] | 3340 | if (size < DQH_ALIGNMENT) |
| 3341 | size = DQH_ALIGNMENT; |
| 3342 | else if ((size % DQH_ALIGNMENT) != 0) { |
| 3343 | size += DQH_ALIGNMENT + 1; |
| 3344 | size &= ~(DQH_ALIGNMENT - 1); |
| 3345 | } |
| 3346 | dev->ep_dqh = dma_alloc_coherent(&pdev->dev, size, |
| 3347 | &dev->ep_dqh_dma, GFP_KERNEL); |
| 3348 | if (!dev->ep_dqh) { |
| 3349 | dev_err(&dev->pdev->dev, "allocate dQH memory failed\n"); |
| 3350 | return -ENOMEM; |
| 3351 | } |
| 3352 | dev->ep_dqh_size = size; |
Felipe Balbi | b9af9ea | 2011-07-04 11:12:32 +0300 | [diff] [blame] | 3353 | dev_vdbg(&dev->pdev->dev, "ep_dqh_size = %zd\n", dev->ep_dqh_size); |
JiebingLi | 912c93d | 2010-08-05 14:18:29 +0100 | [diff] [blame] | 3354 | |
| 3355 | /* create dTD dma_pool resource */ |
| 3356 | dev->dtd_pool = dma_pool_create("langwell_dtd", |
| 3357 | &dev->pdev->dev, |
| 3358 | sizeof(struct langwell_dtd), |
| 3359 | DTD_ALIGNMENT, |
| 3360 | DMA_BOUNDARY); |
| 3361 | |
| 3362 | if (!dev->dtd_pool) |
| 3363 | return -ENOMEM; |
| 3364 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3365 | /* restore PCI state */ |
| 3366 | pci_restore_state(pdev); |
| 3367 | |
| 3368 | /* enable IRQ handler */ |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3369 | if (request_irq(pdev->irq, langwell_irq, IRQF_SHARED, |
| 3370 | driver_name, dev) != 0) { |
| 3371 | dev_err(&dev->pdev->dev, "request interrupt %d failed\n", |
| 3372 | pdev->irq); |
| 3373 | return -EBUSY; |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3374 | } |
| 3375 | dev->got_irq = 1; |
| 3376 | |
| 3377 | /* reset and start controller to run state */ |
| 3378 | if (dev->stopped) { |
| 3379 | /* reset device controller */ |
| 3380 | langwell_udc_reset(dev); |
| 3381 | |
| 3382 | /* reset ep0 dQH and endptctrl */ |
| 3383 | ep0_reset(dev); |
| 3384 | |
| 3385 | /* start device if gadget is loaded */ |
| 3386 | if (dev->driver) |
| 3387 | langwell_udc_start(dev); |
| 3388 | } |
| 3389 | |
| 3390 | /* reset USB status */ |
| 3391 | dev->usb_state = USB_STATE_ATTACHED; |
| 3392 | dev->ep0_state = WAIT_FOR_SETUP; |
| 3393 | dev->ep0_dir = USB_DIR_OUT; |
| 3394 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3395 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3396 | return 0; |
| 3397 | } |
| 3398 | |
| 3399 | |
| 3400 | /* pci driver shutdown */ |
| 3401 | static void langwell_udc_shutdown(struct pci_dev *pdev) |
| 3402 | { |
Felipe Balbi | 5bc639f | 2011-10-08 13:08:01 +0300 | [diff] [blame] | 3403 | struct langwell_udc *dev = pci_get_drvdata(pdev); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3404 | u32 usbmode; |
| 3405 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3406 | dev_dbg(&dev->pdev->dev, "---> %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3407 | |
| 3408 | /* reset controller mode to IDLE */ |
| 3409 | usbmode = readl(&dev->op_regs->usbmode); |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3410 | dev_dbg(&dev->pdev->dev, "usbmode = 0x%08x\n", usbmode); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3411 | usbmode &= (~3 | MODE_IDLE); |
| 3412 | writel(usbmode, &dev->op_regs->usbmode); |
| 3413 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3414 | dev_dbg(&dev->pdev->dev, "<--- %s()\n", __func__); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3415 | } |
| 3416 | |
| 3417 | /*-------------------------------------------------------------------------*/ |
| 3418 | |
| 3419 | static const struct pci_device_id pci_ids[] = { { |
| 3420 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
| 3421 | .class_mask = ~0, |
| 3422 | .vendor = 0x8086, |
| 3423 | .device = 0x0811, |
| 3424 | .subvendor = PCI_ANY_ID, |
| 3425 | .subdevice = PCI_ANY_ID, |
| 3426 | }, { /* end: all zeroes */ } |
| 3427 | }; |
| 3428 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3429 | MODULE_DEVICE_TABLE(pci, pci_ids); |
| 3430 | |
| 3431 | |
| 3432 | static struct pci_driver langwell_pci_driver = { |
| 3433 | .name = (char *) driver_name, |
| 3434 | .id_table = pci_ids, |
| 3435 | |
| 3436 | .probe = langwell_udc_probe, |
| 3437 | .remove = langwell_udc_remove, |
| 3438 | |
| 3439 | /* device controller suspend/resume */ |
| 3440 | .suspend = langwell_udc_suspend, |
| 3441 | .resume = langwell_udc_resume, |
| 3442 | |
| 3443 | .shutdown = langwell_udc_shutdown, |
| 3444 | }; |
| 3445 | |
| 3446 | |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3447 | static int __init init(void) |
| 3448 | { |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3449 | return pci_register_driver(&langwell_pci_driver); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3450 | } |
| 3451 | module_init(init); |
| 3452 | |
| 3453 | |
| 3454 | static void __exit cleanup(void) |
| 3455 | { |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3456 | pci_unregister_driver(&langwell_pci_driver); |
Xiaochen Shen | 5be19a9 | 2009-06-04 15:34:49 +0800 | [diff] [blame] | 3457 | } |
| 3458 | module_exit(cleanup); |
| 3459 | |
JiebingLi | 5f81f4b | 2010-08-05 14:17:54 +0100 | [diff] [blame] | 3460 | |
| 3461 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 3462 | MODULE_AUTHOR("Xiaochen Shen <xiaochen.shen@intel.com>"); |
| 3463 | MODULE_VERSION(DRIVER_VERSION); |
| 3464 | MODULE_LICENSE("GPL"); |
| 3465 | |