| /* |
| * OHCI HCD(Host Controller Driver) for USB. |
| * |
| *(C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> |
| *(C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> |
| *(C) Copyright 2002 Hewlett-Packard Company |
| * |
| * Bus glue for Toshiba Mobile IO(TMIO) Controller's OHCI core |
| * (C) Copyright 2005 Chris Humbert <mahadri-usb@drigon.com> |
| * (C) Copyright 2007, 2008 Dmitry Baryshkov <dbaryshkov@gmail.com> |
| * |
| * This is known to work with the following variants: |
| * TC6393XB revision 3 (32kB SRAM) |
| * |
| * The TMIO's OHCI core DMAs through a small internal buffer that |
| * is directly addressable by the CPU. |
| * |
| * Written from sparse documentation from Toshiba and Sharp's driver |
| * for the 2.4 kernel, |
| * usb-ohci-tc6393.c(C) Copyright 2004 Lineo Solutions, Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| /*#include <linux/fs.h> |
| #include <linux/mount.h> |
| #include <linux/pagemap.h> |
| #include <linux/init.h> |
| #include <linux/namei.h> |
| #include <linux/sched.h>*/ |
| #include <linux/platform_device.h> |
| #include <linux/mfd/core.h> |
| #include <linux/mfd/tmio.h> |
| #include <linux/dma-mapping.h> |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| /* |
| * USB Host Controller Configuration Register |
| */ |
| #define CCR_REVID 0x08 /* b Revision ID */ |
| #define CCR_BASE 0x10 /* l USB Control Register Base Address Low */ |
| #define CCR_ILME 0x40 /* b Internal Local Memory Enable */ |
| #define CCR_PM 0x4c /* w Power Management */ |
| #define CCR_INTC 0x50 /* b INT Control */ |
| #define CCR_LMW1L 0x54 /* w Local Memory Window 1 LMADRS Low */ |
| #define CCR_LMW1H 0x56 /* w Local Memory Window 1 LMADRS High */ |
| #define CCR_LMW1BL 0x58 /* w Local Memory Window 1 Base Address Low */ |
| #define CCR_LMW1BH 0x5A /* w Local Memory Window 1 Base Address High */ |
| #define CCR_LMW2L 0x5C /* w Local Memory Window 2 LMADRS Low */ |
| #define CCR_LMW2H 0x5E /* w Local Memory Window 2 LMADRS High */ |
| #define CCR_LMW2BL 0x60 /* w Local Memory Window 2 Base Address Low */ |
| #define CCR_LMW2BH 0x62 /* w Local Memory Window 2 Base Address High */ |
| #define CCR_MISC 0xFC /* b MISC */ |
| |
| #define CCR_PM_GKEN 0x0001 |
| #define CCR_PM_CKRNEN 0x0002 |
| #define CCR_PM_USBPW1 0x0004 |
| #define CCR_PM_USBPW2 0x0008 |
| #define CCR_PM_USBPW3 0x0008 |
| #define CCR_PM_PMEE 0x0100 |
| #define CCR_PM_PMES 0x8000 |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| struct tmio_hcd { |
| void __iomem *ccr; |
| spinlock_t lock; /* protects RMW cycles */ |
| }; |
| |
| #define hcd_to_tmio(hcd) ((struct tmio_hcd *)(hcd_to_ohci(hcd) + 1)) |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| static void tmio_write_pm(struct platform_device *dev) |
| { |
| struct usb_hcd *hcd = platform_get_drvdata(dev); |
| struct tmio_hcd *tmio = hcd_to_tmio(hcd); |
| u16 pm; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&tmio->lock, flags); |
| |
| pm = CCR_PM_GKEN | CCR_PM_CKRNEN | |
| CCR_PM_PMEE | CCR_PM_PMES; |
| |
| tmio_iowrite16(pm, tmio->ccr + CCR_PM); |
| spin_unlock_irqrestore(&tmio->lock, flags); |
| } |
| |
| static void tmio_stop_hc(struct platform_device *dev) |
| { |
| struct usb_hcd *hcd = platform_get_drvdata(dev); |
| struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
| struct tmio_hcd *tmio = hcd_to_tmio(hcd); |
| u16 pm; |
| |
| pm = CCR_PM_GKEN | CCR_PM_CKRNEN; |
| switch (ohci->num_ports) { |
| default: |
| dev_err(&dev->dev, "Unsupported amount of ports: %d\n", ohci->num_ports); |
| case 3: |
| pm |= CCR_PM_USBPW3; |
| case 2: |
| pm |= CCR_PM_USBPW2; |
| case 1: |
| pm |= CCR_PM_USBPW1; |
| } |
| tmio_iowrite8(0, tmio->ccr + CCR_INTC); |
| tmio_iowrite8(0, tmio->ccr + CCR_ILME); |
| tmio_iowrite16(0, tmio->ccr + CCR_BASE); |
| tmio_iowrite16(0, tmio->ccr + CCR_BASE + 2); |
| tmio_iowrite16(pm, tmio->ccr + CCR_PM); |
| } |
| |
| static void tmio_start_hc(struct platform_device *dev) |
| { |
| struct usb_hcd *hcd = platform_get_drvdata(dev); |
| struct tmio_hcd *tmio = hcd_to_tmio(hcd); |
| unsigned long base = hcd->rsrc_start; |
| |
| tmio_write_pm(dev); |
| tmio_iowrite16(base, tmio->ccr + CCR_BASE); |
| tmio_iowrite16(base >> 16, tmio->ccr + CCR_BASE + 2); |
| tmio_iowrite8(1, tmio->ccr + CCR_ILME); |
| tmio_iowrite8(2, tmio->ccr + CCR_INTC); |
| |
| dev_info(&dev->dev, "revision %d @ 0x%08llx, irq %d\n", |
| tmio_ioread8(tmio->ccr + CCR_REVID), hcd->rsrc_start, hcd->irq); |
| } |
| |
| static int ohci_tmio_start(struct usb_hcd *hcd) |
| { |
| struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
| int ret; |
| |
| if ((ret = ohci_init(ohci)) < 0) |
| return ret; |
| |
| if ((ret = ohci_run(ohci)) < 0) { |
| dev_err(hcd->self.controller, "can't start %s\n", |
| hcd->self.bus_name); |
| ohci_stop(hcd); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static const struct hc_driver ohci_tmio_hc_driver = { |
| .description = hcd_name, |
| .product_desc = "TMIO OHCI USB Host Controller", |
| .hcd_priv_size = sizeof(struct ohci_hcd) + sizeof (struct tmio_hcd), |
| |
| /* generic hardware linkage */ |
| .irq = ohci_irq, |
| .flags = HCD_USB11 | HCD_MEMORY | HCD_LOCAL_MEM, |
| |
| /* basic lifecycle operations */ |
| .start = ohci_tmio_start, |
| .stop = ohci_stop, |
| .shutdown = ohci_shutdown, |
| |
| /* managing i/o requests and associated device resources */ |
| .urb_enqueue = ohci_urb_enqueue, |
| .urb_dequeue = ohci_urb_dequeue, |
| .endpoint_disable = ohci_endpoint_disable, |
| |
| /* scheduling support */ |
| .get_frame_number = ohci_get_frame, |
| |
| /* root hub support */ |
| .hub_status_data = ohci_hub_status_data, |
| .hub_control = ohci_hub_control, |
| #ifdef CONFIG_PM |
| .bus_suspend = ohci_bus_suspend, |
| .bus_resume = ohci_bus_resume, |
| #endif |
| .start_port_reset = ohci_start_port_reset, |
| }; |
| |
| /*-------------------------------------------------------------------------*/ |
| static struct platform_driver ohci_hcd_tmio_driver; |
| |
| static int __devinit ohci_hcd_tmio_drv_probe(struct platform_device *dev) |
| { |
| const struct mfd_cell *cell = mfd_get_cell(dev); |
| struct resource *regs = platform_get_resource(dev, IORESOURCE_MEM, 0); |
| struct resource *config = platform_get_resource(dev, IORESOURCE_MEM, 1); |
| struct resource *sram = platform_get_resource(dev, IORESOURCE_MEM, 2); |
| int irq = platform_get_irq(dev, 0); |
| struct tmio_hcd *tmio; |
| struct ohci_hcd *ohci; |
| struct usb_hcd *hcd; |
| int ret; |
| |
| if (usb_disabled()) |
| return -ENODEV; |
| |
| if (!cell) |
| return -EINVAL; |
| |
| hcd = usb_create_hcd(&ohci_tmio_hc_driver, &dev->dev, dev_name(&dev->dev)); |
| if (!hcd) { |
| ret = -ENOMEM; |
| goto err_usb_create_hcd; |
| } |
| |
| hcd->rsrc_start = regs->start; |
| hcd->rsrc_len = resource_size(regs); |
| |
| tmio = hcd_to_tmio(hcd); |
| |
| spin_lock_init(&tmio->lock); |
| |
| tmio->ccr = ioremap(config->start, resource_size(config)); |
| if (!tmio->ccr) { |
| ret = -ENOMEM; |
| goto err_ioremap_ccr; |
| } |
| |
| hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| if (!hcd->regs) { |
| ret = -ENOMEM; |
| goto err_ioremap_regs; |
| } |
| |
| if (!dma_declare_coherent_memory(&dev->dev, sram->start, |
| sram->start, |
| resource_size(sram), |
| DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE)) { |
| ret = -EBUSY; |
| goto err_dma_declare; |
| } |
| |
| if (cell->enable) { |
| ret = cell->enable(dev); |
| if (ret) |
| goto err_enable; |
| } |
| |
| tmio_start_hc(dev); |
| ohci = hcd_to_ohci(hcd); |
| ohci_hcd_init(ohci); |
| |
| ret = usb_add_hcd(hcd, irq, 0); |
| if (ret) |
| goto err_add_hcd; |
| |
| if (ret == 0) |
| return ret; |
| |
| usb_remove_hcd(hcd); |
| |
| err_add_hcd: |
| tmio_stop_hc(dev); |
| if (cell->disable) |
| cell->disable(dev); |
| err_enable: |
| dma_release_declared_memory(&dev->dev); |
| err_dma_declare: |
| iounmap(hcd->regs); |
| err_ioremap_regs: |
| iounmap(tmio->ccr); |
| err_ioremap_ccr: |
| usb_put_hcd(hcd); |
| err_usb_create_hcd: |
| |
| return ret; |
| } |
| |
| static int __devexit ohci_hcd_tmio_drv_remove(struct platform_device *dev) |
| { |
| struct usb_hcd *hcd = platform_get_drvdata(dev); |
| struct tmio_hcd *tmio = hcd_to_tmio(hcd); |
| const struct mfd_cell *cell = mfd_get_cell(dev); |
| |
| usb_remove_hcd(hcd); |
| tmio_stop_hc(dev); |
| if (cell->disable) |
| cell->disable(dev); |
| dma_release_declared_memory(&dev->dev); |
| iounmap(hcd->regs); |
| iounmap(tmio->ccr); |
| usb_put_hcd(hcd); |
| |
| platform_set_drvdata(dev, NULL); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| static int ohci_hcd_tmio_drv_suspend(struct platform_device *dev, pm_message_t state) |
| { |
| const struct mfd_cell *cell = mfd_get_cell(dev); |
| struct usb_hcd *hcd = platform_get_drvdata(dev); |
| struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
| struct tmio_hcd *tmio = hcd_to_tmio(hcd); |
| unsigned long flags; |
| u8 misc; |
| int ret; |
| |
| if (time_before(jiffies, ohci->next_statechange)) |
| msleep(5); |
| ohci->next_statechange = jiffies; |
| |
| spin_lock_irqsave(&tmio->lock, flags); |
| |
| misc = tmio_ioread8(tmio->ccr + CCR_MISC); |
| misc |= 1 << 3; /* USSUSP */ |
| tmio_iowrite8(misc, tmio->ccr + CCR_MISC); |
| |
| spin_unlock_irqrestore(&tmio->lock, flags); |
| |
| if (cell->suspend) { |
| ret = cell->suspend(dev); |
| if (ret) |
| return ret; |
| } |
| return 0; |
| } |
| |
| static int ohci_hcd_tmio_drv_resume(struct platform_device *dev) |
| { |
| const struct mfd_cell *cell = mfd_get_cell(dev); |
| struct usb_hcd *hcd = platform_get_drvdata(dev); |
| struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
| struct tmio_hcd *tmio = hcd_to_tmio(hcd); |
| unsigned long flags; |
| u8 misc; |
| int ret; |
| |
| if (time_before(jiffies, ohci->next_statechange)) |
| msleep(5); |
| ohci->next_statechange = jiffies; |
| |
| if (cell->resume) { |
| ret = cell->resume(dev); |
| if (ret) |
| return ret; |
| } |
| |
| tmio_start_hc(dev); |
| |
| spin_lock_irqsave(&tmio->lock, flags); |
| |
| misc = tmio_ioread8(tmio->ccr + CCR_MISC); |
| misc &= ~(1 << 3); /* USSUSP */ |
| tmio_iowrite8(misc, tmio->ccr + CCR_MISC); |
| |
| spin_unlock_irqrestore(&tmio->lock, flags); |
| |
| ohci_resume(hcd, false); |
| |
| return 0; |
| } |
| #else |
| #define ohci_hcd_tmio_drv_suspend NULL |
| #define ohci_hcd_tmio_drv_resume NULL |
| #endif |
| |
| static struct platform_driver ohci_hcd_tmio_driver = { |
| .probe = ohci_hcd_tmio_drv_probe, |
| .remove = __devexit_p(ohci_hcd_tmio_drv_remove), |
| .shutdown = usb_hcd_platform_shutdown, |
| .suspend = ohci_hcd_tmio_drv_suspend, |
| .resume = ohci_hcd_tmio_drv_resume, |
| .driver = { |
| .name = "tmio-ohci", |
| .owner = THIS_MODULE, |
| }, |
| }; |