| /* |
| * Edgeport USB Serial Converter driver |
| * |
| * Copyright (C) 2000 Inside Out Networks, All rights reserved. |
| * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * Supports the following devices: |
| * Edgeport/4 |
| * Edgeport/4t |
| * Edgeport/2 |
| * Edgeport/4i |
| * Edgeport/2i |
| * Edgeport/421 |
| * Edgeport/21 |
| * Rapidport/4 |
| * Edgeport/8 |
| * Edgeport/2D8 |
| * Edgeport/4D8 |
| * Edgeport/8i |
| * |
| * For questions or problems with this driver, contact Inside Out |
| * Networks technical support, or Peter Berger <pberger@brimson.com>, |
| * or Al Borchers <alborchers@steinerpoint.com>. |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/jiffies.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/tty.h> |
| #include <linux/tty_driver.h> |
| #include <linux/tty_flip.h> |
| #include <linux/module.h> |
| #include <linux/spinlock.h> |
| #include <linux/serial.h> |
| #include <linux/ioctl.h> |
| #include <linux/wait.h> |
| #include <linux/firmware.h> |
| #include <linux/ihex.h> |
| #include <linux/uaccess.h> |
| #include <linux/usb.h> |
| #include <linux/usb/serial.h> |
| #include "io_edgeport.h" |
| #include "io_ionsp.h" /* info for the iosp messages */ |
| #include "io_16654.h" /* 16654 UART defines */ |
| |
| #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" |
| #define DRIVER_DESC "Edgeport USB Serial Driver" |
| |
| #define MAX_NAME_LEN 64 |
| |
| #define CHASE_TIMEOUT (5*HZ) /* 5 seconds */ |
| #define OPEN_TIMEOUT (5*HZ) /* 5 seconds */ |
| #define COMMAND_TIMEOUT (5*HZ) /* 5 seconds */ |
| |
| /* receive port state */ |
| enum RXSTATE { |
| EXPECT_HDR1 = 0, /* Expect header byte 1 */ |
| EXPECT_HDR2 = 1, /* Expect header byte 2 */ |
| EXPECT_DATA = 2, /* Expect 'RxBytesRemaining' data */ |
| EXPECT_HDR3 = 3, /* Expect header byte 3 (for status hdrs only) */ |
| }; |
| |
| |
| /* Transmit Fifo |
| * This Transmit queue is an extension of the edgeport Rx buffer. |
| * The maximum amount of data buffered in both the edgeport |
| * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits. |
| */ |
| struct TxFifo { |
| unsigned int head; /* index to head pointer (write) */ |
| unsigned int tail; /* index to tail pointer (read) */ |
| unsigned int count; /* Bytes in queue */ |
| unsigned int size; /* Max size of queue (equal to Max number of TxCredits) */ |
| unsigned char *fifo; /* allocated Buffer */ |
| }; |
| |
| /* This structure holds all of the local port information */ |
| struct edgeport_port { |
| __u16 txCredits; /* our current credits for this port */ |
| __u16 maxTxCredits; /* the max size of the port */ |
| |
| struct TxFifo txfifo; /* transmit fifo -- size will be maxTxCredits */ |
| struct urb *write_urb; /* write URB for this port */ |
| bool write_in_progress; /* 'true' while a write URB is outstanding */ |
| spinlock_t ep_lock; |
| |
| __u8 shadowLCR; /* last LCR value received */ |
| __u8 shadowMCR; /* last MCR value received */ |
| __u8 shadowMSR; /* last MSR value received */ |
| __u8 shadowLSR; /* last LSR value received */ |
| __u8 shadowXonChar; /* last value set as XON char in Edgeport */ |
| __u8 shadowXoffChar; /* last value set as XOFF char in Edgeport */ |
| __u8 validDataMask; |
| __u32 baudRate; |
| |
| bool open; |
| bool openPending; |
| bool commandPending; |
| bool closePending; |
| bool chaseResponsePending; |
| |
| wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ |
| wait_queue_head_t wait_open; /* for handling sleeping while waiting for open to finish */ |
| wait_queue_head_t wait_command; /* for handling sleeping while waiting for command to finish */ |
| wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ |
| |
| struct async_icount icount; |
| struct usb_serial_port *port; /* loop back to the owner of this object */ |
| }; |
| |
| |
| /* This structure holds all of the individual device information */ |
| struct edgeport_serial { |
| char name[MAX_NAME_LEN+2]; /* string name of this device */ |
| |
| struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ |
| struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ |
| struct edgeport_product_info product_info; /* Product Info */ |
| struct edge_compatibility_descriptor epic_descriptor; /* Edgeport compatible descriptor */ |
| int is_epic; /* flag if EPiC device or not */ |
| |
| __u8 interrupt_in_endpoint; /* the interrupt endpoint handle */ |
| unsigned char *interrupt_in_buffer; /* the buffer we use for the interrupt endpoint */ |
| struct urb *interrupt_read_urb; /* our interrupt urb */ |
| |
| __u8 bulk_in_endpoint; /* the bulk in endpoint handle */ |
| unsigned char *bulk_in_buffer; /* the buffer we use for the bulk in endpoint */ |
| struct urb *read_urb; /* our bulk read urb */ |
| bool read_in_progress; |
| spinlock_t es_lock; |
| |
| __u8 bulk_out_endpoint; /* the bulk out endpoint handle */ |
| |
| __s16 rxBytesAvail; /* the number of bytes that we need to read from this device */ |
| |
| enum RXSTATE rxState; /* the current state of the bulk receive processor */ |
| __u8 rxHeader1; /* receive header byte 1 */ |
| __u8 rxHeader2; /* receive header byte 2 */ |
| __u8 rxHeader3; /* receive header byte 3 */ |
| __u8 rxPort; /* the port that we are currently receiving data for */ |
| __u8 rxStatusCode; /* the receive status code */ |
| __u8 rxStatusParam; /* the receive status paramater */ |
| __s16 rxBytesRemaining; /* the number of port bytes left to read */ |
| struct usb_serial *serial; /* loop back to the owner of this object */ |
| }; |
| |
| /* baud rate information */ |
| struct divisor_table_entry { |
| __u32 BaudRate; |
| __u16 Divisor; |
| }; |
| |
| /* |
| * Define table of divisors for Rev A EdgePort/4 hardware |
| * These assume a 3.6864MHz crystal, the standard /16, and |
| * MCR.7 = 0. |
| */ |
| |
| static const struct divisor_table_entry divisor_table[] = { |
| { 50, 4608}, |
| { 75, 3072}, |
| { 110, 2095}, /* 2094.545455 => 230450 => .0217 % over */ |
| { 134, 1713}, /* 1713.011152 => 230398.5 => .00065% under */ |
| { 150, 1536}, |
| { 300, 768}, |
| { 600, 384}, |
| { 1200, 192}, |
| { 1800, 128}, |
| { 2400, 96}, |
| { 4800, 48}, |
| { 7200, 32}, |
| { 9600, 24}, |
| { 14400, 16}, |
| { 19200, 12}, |
| { 38400, 6}, |
| { 57600, 4}, |
| { 115200, 2}, |
| { 230400, 1}, |
| }; |
| |
| /* Number of outstanding Command Write Urbs */ |
| static atomic_t CmdUrbs = ATOMIC_INIT(0); |
| |
| |
| /* local function prototypes */ |
| |
| /* function prototypes for all URB callbacks */ |
| static void edge_interrupt_callback(struct urb *urb); |
| static void edge_bulk_in_callback(struct urb *urb); |
| static void edge_bulk_out_data_callback(struct urb *urb); |
| static void edge_bulk_out_cmd_callback(struct urb *urb); |
| |
| /* function prototypes for the usbserial callbacks */ |
| static int edge_open(struct tty_struct *tty, struct usb_serial_port *port); |
| static void edge_close(struct usb_serial_port *port); |
| static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, |
| const unsigned char *buf, int count); |
| static int edge_write_room(struct tty_struct *tty); |
| static int edge_chars_in_buffer(struct tty_struct *tty); |
| static void edge_throttle(struct tty_struct *tty); |
| static void edge_unthrottle(struct tty_struct *tty); |
| static void edge_set_termios(struct tty_struct *tty, |
| struct usb_serial_port *port, |
| struct ktermios *old_termios); |
| static int edge_ioctl(struct tty_struct *tty, |
| unsigned int cmd, unsigned long arg); |
| static void edge_break(struct tty_struct *tty, int break_state); |
| static int edge_tiocmget(struct tty_struct *tty); |
| static int edge_tiocmset(struct tty_struct *tty, |
| unsigned int set, unsigned int clear); |
| static int edge_get_icount(struct tty_struct *tty, |
| struct serial_icounter_struct *icount); |
| static int edge_startup(struct usb_serial *serial); |
| static void edge_disconnect(struct usb_serial *serial); |
| static void edge_release(struct usb_serial *serial); |
| static int edge_port_probe(struct usb_serial_port *port); |
| static int edge_port_remove(struct usb_serial_port *port); |
| |
| #include "io_tables.h" /* all of the devices that this driver supports */ |
| |
| /* function prototypes for all of our local functions */ |
| |
| static void process_rcvd_data(struct edgeport_serial *edge_serial, |
| unsigned char *buffer, __u16 bufferLength); |
| static void process_rcvd_status(struct edgeport_serial *edge_serial, |
| __u8 byte2, __u8 byte3); |
| static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, |
| int length); |
| static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr); |
| static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, |
| __u8 lsr, __u8 data); |
| static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command, |
| __u8 param); |
| static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor); |
| static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, |
| int baudRate); |
| static void change_port_settings(struct tty_struct *tty, |
| struct edgeport_port *edge_port, |
| struct ktermios *old_termios); |
| static int send_cmd_write_uart_register(struct edgeport_port *edge_port, |
| __u8 regNum, __u8 regValue); |
| static int write_cmd_usb(struct edgeport_port *edge_port, |
| unsigned char *buffer, int writeLength); |
| static void send_more_port_data(struct edgeport_serial *edge_serial, |
| struct edgeport_port *edge_port); |
| |
| static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, |
| __u16 length, const __u8 *data); |
| static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr, |
| __u16 length, __u8 *data); |
| static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, |
| __u16 length, const __u8 *data); |
| static void get_manufacturing_desc(struct edgeport_serial *edge_serial); |
| static void get_boot_desc(struct edgeport_serial *edge_serial); |
| static void load_application_firmware(struct edgeport_serial *edge_serial); |
| |
| static void unicode_to_ascii(char *string, int buflen, |
| __le16 *unicode, int unicode_size); |
| |
| |
| /* ************************************************************************ */ |
| /* ************************************************************************ */ |
| /* ************************************************************************ */ |
| /* ************************************************************************ */ |
| |
| /************************************************************************ |
| * * |
| * update_edgeport_E2PROM() Compare current versions of * |
| * Boot ROM and Manufacture * |
| * Descriptors with versions * |
| * embedded in this driver * |
| * * |
| ************************************************************************/ |
| static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial) |
| { |
| struct device *dev = &edge_serial->serial->dev->dev; |
| __u32 BootCurVer; |
| __u32 BootNewVer; |
| __u8 BootMajorVersion; |
| __u8 BootMinorVersion; |
| __u16 BootBuildNumber; |
| __u32 Bootaddr; |
| const struct ihex_binrec *rec; |
| const struct firmware *fw; |
| const char *fw_name; |
| int response; |
| |
| switch (edge_serial->product_info.iDownloadFile) { |
| case EDGE_DOWNLOAD_FILE_I930: |
| fw_name = "edgeport/boot.fw"; |
| break; |
| case EDGE_DOWNLOAD_FILE_80251: |
| fw_name = "edgeport/boot2.fw"; |
| break; |
| default: |
| return; |
| } |
| |
| response = request_ihex_firmware(&fw, fw_name, |
| &edge_serial->serial->dev->dev); |
| if (response) { |
| dev_err(dev, "Failed to load image \"%s\" err %d\n", |
| fw_name, response); |
| return; |
| } |
| |
| rec = (const struct ihex_binrec *)fw->data; |
| BootMajorVersion = rec->data[0]; |
| BootMinorVersion = rec->data[1]; |
| BootBuildNumber = (rec->data[2] << 8) | rec->data[3]; |
| |
| /* Check Boot Image Version */ |
| BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) + |
| (edge_serial->boot_descriptor.MinorVersion << 16) + |
| le16_to_cpu(edge_serial->boot_descriptor.BuildNumber); |
| |
| BootNewVer = (BootMajorVersion << 24) + |
| (BootMinorVersion << 16) + |
| BootBuildNumber; |
| |
| dev_dbg(dev, "Current Boot Image version %d.%d.%d\n", |
| edge_serial->boot_descriptor.MajorVersion, |
| edge_serial->boot_descriptor.MinorVersion, |
| le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); |
| |
| |
| if (BootNewVer > BootCurVer) { |
| dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n", |
| edge_serial->boot_descriptor.MajorVersion, |
| edge_serial->boot_descriptor.MinorVersion, |
| le16_to_cpu(edge_serial->boot_descriptor.BuildNumber), |
| BootMajorVersion, BootMinorVersion, BootBuildNumber); |
| |
| dev_dbg(dev, "Downloading new Boot Image\n"); |
| |
| for (rec = ihex_next_binrec(rec); rec; |
| rec = ihex_next_binrec(rec)) { |
| Bootaddr = be32_to_cpu(rec->addr); |
| response = rom_write(edge_serial->serial, |
| Bootaddr >> 16, |
| Bootaddr & 0xFFFF, |
| be16_to_cpu(rec->len), |
| &rec->data[0]); |
| if (response < 0) { |
| dev_err(&edge_serial->serial->dev->dev, |
| "rom_write failed (%x, %x, %d)\n", |
| Bootaddr >> 16, Bootaddr & 0xFFFF, |
| be16_to_cpu(rec->len)); |
| break; |
| } |
| } |
| } else { |
| dev_dbg(dev, "Boot Image -- already up to date\n"); |
| } |
| release_firmware(fw); |
| } |
| |
| #if 0 |
| /************************************************************************ |
| * |
| * Get string descriptor from device |
| * |
| ************************************************************************/ |
| static int get_string_desc(struct usb_device *dev, int Id, |
| struct usb_string_descriptor **pRetDesc) |
| { |
| struct usb_string_descriptor StringDesc; |
| struct usb_string_descriptor *pStringDesc; |
| |
| dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id); |
| |
| if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, |
| sizeof(StringDesc))) |
| return 0; |
| |
| pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL); |
| if (!pStringDesc) |
| return -1; |
| |
| if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, |
| StringDesc.bLength)) { |
| kfree(pStringDesc); |
| return -1; |
| } |
| |
| *pRetDesc = pStringDesc; |
| return 0; |
| } |
| #endif |
| |
| static void dump_product_info(struct edgeport_serial *edge_serial, |
| struct edgeport_product_info *product_info) |
| { |
| struct device *dev = &edge_serial->serial->dev->dev; |
| |
| /* Dump Product Info structure */ |
| dev_dbg(dev, "**Product Information:\n"); |
| dev_dbg(dev, " ProductId %x\n", product_info->ProductId); |
| dev_dbg(dev, " NumPorts %d\n", product_info->NumPorts); |
| dev_dbg(dev, " ProdInfoVer %d\n", product_info->ProdInfoVer); |
| dev_dbg(dev, " IsServer %d\n", product_info->IsServer); |
| dev_dbg(dev, " IsRS232 %d\n", product_info->IsRS232); |
| dev_dbg(dev, " IsRS422 %d\n", product_info->IsRS422); |
| dev_dbg(dev, " IsRS485 %d\n", product_info->IsRS485); |
| dev_dbg(dev, " RomSize %d\n", product_info->RomSize); |
| dev_dbg(dev, " RamSize %d\n", product_info->RamSize); |
| dev_dbg(dev, " CpuRev %x\n", product_info->CpuRev); |
| dev_dbg(dev, " BoardRev %x\n", product_info->BoardRev); |
| dev_dbg(dev, " BootMajorVersion %d.%d.%d\n", |
| product_info->BootMajorVersion, |
| product_info->BootMinorVersion, |
| le16_to_cpu(product_info->BootBuildNumber)); |
| dev_dbg(dev, " FirmwareMajorVersion %d.%d.%d\n", |
| product_info->FirmwareMajorVersion, |
| product_info->FirmwareMinorVersion, |
| le16_to_cpu(product_info->FirmwareBuildNumber)); |
| dev_dbg(dev, " ManufactureDescDate %d/%d/%d\n", |
| product_info->ManufactureDescDate[0], |
| product_info->ManufactureDescDate[1], |
| product_info->ManufactureDescDate[2]+1900); |
| dev_dbg(dev, " iDownloadFile 0x%x\n", |
| product_info->iDownloadFile); |
| dev_dbg(dev, " EpicVer %d\n", product_info->EpicVer); |
| } |
| |
| static void get_product_info(struct edgeport_serial *edge_serial) |
| { |
| struct edgeport_product_info *product_info = &edge_serial->product_info; |
| |
| memset(product_info, 0, sizeof(struct edgeport_product_info)); |
| |
| product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP); |
| product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts; |
| product_info->ProdInfoVer = 0; |
| |
| product_info->RomSize = edge_serial->manuf_descriptor.RomSize; |
| product_info->RamSize = edge_serial->manuf_descriptor.RamSize; |
| product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev; |
| product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev; |
| |
| product_info->BootMajorVersion = |
| edge_serial->boot_descriptor.MajorVersion; |
| product_info->BootMinorVersion = |
| edge_serial->boot_descriptor.MinorVersion; |
| product_info->BootBuildNumber = |
| edge_serial->boot_descriptor.BuildNumber; |
| |
| memcpy(product_info->ManufactureDescDate, |
| edge_serial->manuf_descriptor.DescDate, |
| sizeof(edge_serial->manuf_descriptor.DescDate)); |
| |
| /* check if this is 2nd generation hardware */ |
| if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) |
| & ION_DEVICE_ID_80251_NETCHIP) |
| product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251; |
| else |
| product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930; |
| |
| /* Determine Product type and set appropriate flags */ |
| switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) { |
| case ION_DEVICE_ID_EDGEPORT_COMPATIBLE: |
| case ION_DEVICE_ID_EDGEPORT_4T: |
| case ION_DEVICE_ID_EDGEPORT_4: |
| case ION_DEVICE_ID_EDGEPORT_2: |
| case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU: |
| case ION_DEVICE_ID_EDGEPORT_8: |
| case ION_DEVICE_ID_EDGEPORT_421: |
| case ION_DEVICE_ID_EDGEPORT_21: |
| case ION_DEVICE_ID_EDGEPORT_2_DIN: |
| case ION_DEVICE_ID_EDGEPORT_4_DIN: |
| case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU: |
| product_info->IsRS232 = 1; |
| break; |
| |
| case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */ |
| product_info->IsRS422 = 1; |
| product_info->IsRS485 = 1; |
| break; |
| |
| case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */ |
| case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */ |
| product_info->IsRS422 = 1; |
| break; |
| } |
| |
| dump_product_info(edge_serial, product_info); |
| } |
| |
| static int get_epic_descriptor(struct edgeport_serial *ep) |
| { |
| int result; |
| struct usb_serial *serial = ep->serial; |
| struct edgeport_product_info *product_info = &ep->product_info; |
| struct edge_compatibility_descriptor *epic = &ep->epic_descriptor; |
| struct edge_compatibility_bits *bits; |
| struct device *dev = &serial->dev->dev; |
| |
| ep->is_epic = 0; |
| result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| USB_REQUEST_ION_GET_EPIC_DESC, |
| 0xC0, 0x00, 0x00, |
| &ep->epic_descriptor, |
| sizeof(struct edge_compatibility_descriptor), |
| 300); |
| |
| if (result > 0) { |
| ep->is_epic = 1; |
| memset(product_info, 0, sizeof(struct edgeport_product_info)); |
| |
| product_info->NumPorts = epic->NumPorts; |
| product_info->ProdInfoVer = 0; |
| product_info->FirmwareMajorVersion = epic->MajorVersion; |
| product_info->FirmwareMinorVersion = epic->MinorVersion; |
| product_info->FirmwareBuildNumber = epic->BuildNumber; |
| product_info->iDownloadFile = epic->iDownloadFile; |
| product_info->EpicVer = epic->EpicVer; |
| product_info->Epic = epic->Supports; |
| product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE; |
| dump_product_info(ep, product_info); |
| |
| bits = &ep->epic_descriptor.Supports; |
| dev_dbg(dev, "**EPIC descriptor:\n"); |
| dev_dbg(dev, " VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE"); |
| dev_dbg(dev, " IOSPOpen : %s\n", bits->IOSPOpen ? "TRUE": "FALSE"); |
| dev_dbg(dev, " IOSPClose : %s\n", bits->IOSPClose ? "TRUE": "FALSE"); |
| dev_dbg(dev, " IOSPChase : %s\n", bits->IOSPChase ? "TRUE": "FALSE"); |
| dev_dbg(dev, " IOSPSetRxFlow : %s\n", bits->IOSPSetRxFlow ? "TRUE": "FALSE"); |
| dev_dbg(dev, " IOSPSetTxFlow : %s\n", bits->IOSPSetTxFlow ? "TRUE": "FALSE"); |
| dev_dbg(dev, " IOSPSetXChar : %s\n", bits->IOSPSetXChar ? "TRUE": "FALSE"); |
| dev_dbg(dev, " IOSPRxCheck : %s\n", bits->IOSPRxCheck ? "TRUE": "FALSE"); |
| dev_dbg(dev, " IOSPSetClrBreak : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE"); |
| dev_dbg(dev, " IOSPWriteMCR : %s\n", bits->IOSPWriteMCR ? "TRUE": "FALSE"); |
| dev_dbg(dev, " IOSPWriteLCR : %s\n", bits->IOSPWriteLCR ? "TRUE": "FALSE"); |
| dev_dbg(dev, " IOSPSetBaudRate : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE"); |
| dev_dbg(dev, " TrueEdgeport : %s\n", bits->TrueEdgeport ? "TRUE": "FALSE"); |
| } |
| |
| return result; |
| } |
| |
| |
| /************************************************************************/ |
| /************************************************************************/ |
| /* U S B C A L L B A C K F U N C T I O N S */ |
| /* U S B C A L L B A C K F U N C T I O N S */ |
| /************************************************************************/ |
| /************************************************************************/ |
| |
| /***************************************************************************** |
| * edge_interrupt_callback |
| * this is the callback function for when we have received data on the |
| * interrupt endpoint. |
| *****************************************************************************/ |
| static void edge_interrupt_callback(struct urb *urb) |
| { |
| struct edgeport_serial *edge_serial = urb->context; |
| struct device *dev; |
| struct edgeport_port *edge_port; |
| struct usb_serial_port *port; |
| struct tty_struct *tty; |
| unsigned char *data = urb->transfer_buffer; |
| int length = urb->actual_length; |
| int bytes_avail; |
| int position; |
| int txCredits; |
| int portNumber; |
| int result; |
| int status = urb->status; |
| |
| switch (status) { |
| case 0: |
| /* success */ |
| break; |
| case -ECONNRESET: |
| case -ENOENT: |
| case -ESHUTDOWN: |
| /* this urb is terminated, clean up */ |
| dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status); |
| return; |
| default: |
| dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status); |
| goto exit; |
| } |
| |
| dev = &edge_serial->serial->dev->dev; |
| |
| /* process this interrupt-read even if there are no ports open */ |
| if (length) { |
| usb_serial_debug_data(dev, __func__, length, data); |
| |
| if (length > 1) { |
| bytes_avail = data[0] | (data[1] << 8); |
| if (bytes_avail) { |
| spin_lock(&edge_serial->es_lock); |
| edge_serial->rxBytesAvail += bytes_avail; |
| dev_dbg(dev, |
| "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n", |
| __func__, bytes_avail, |
| edge_serial->rxBytesAvail, |
| edge_serial->read_in_progress); |
| |
| if (edge_serial->rxBytesAvail > 0 && |
| !edge_serial->read_in_progress) { |
| dev_dbg(dev, "%s - posting a read\n", __func__); |
| edge_serial->read_in_progress = true; |
| |
| /* we have pending bytes on the |
| bulk in pipe, send a request */ |
| result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); |
| if (result) { |
| dev_err(dev, |
| "%s - usb_submit_urb(read bulk) failed with result = %d\n", |
| __func__, result); |
| edge_serial->read_in_progress = false; |
| } |
| } |
| spin_unlock(&edge_serial->es_lock); |
| } |
| } |
| /* grab the txcredits for the ports if available */ |
| position = 2; |
| portNumber = 0; |
| while ((position < length) && |
| (portNumber < edge_serial->serial->num_ports)) { |
| txCredits = data[position] | (data[position+1] << 8); |
| if (txCredits) { |
| port = edge_serial->serial->port[portNumber]; |
| edge_port = usb_get_serial_port_data(port); |
| if (edge_port->open) { |
| spin_lock(&edge_port->ep_lock); |
| edge_port->txCredits += txCredits; |
| spin_unlock(&edge_port->ep_lock); |
| dev_dbg(dev, "%s - txcredits for port%d = %d\n", |
| __func__, portNumber, |
| edge_port->txCredits); |
| |
| /* tell the tty driver that something |
| has changed */ |
| tty = tty_port_tty_get( |
| &edge_port->port->port); |
| if (tty) { |
| tty_wakeup(tty); |
| tty_kref_put(tty); |
| } |
| /* Since we have more credit, check |
| if more data can be sent */ |
| send_more_port_data(edge_serial, |
| edge_port); |
| } |
| } |
| position += 2; |
| ++portNumber; |
| } |
| } |
| |
| exit: |
| result = usb_submit_urb(urb, GFP_ATOMIC); |
| if (result) |
| dev_err(&urb->dev->dev, |
| "%s - Error %d submitting control urb\n", |
| __func__, result); |
| } |
| |
| |
| /***************************************************************************** |
| * edge_bulk_in_callback |
| * this is the callback function for when we have received data on the |
| * bulk in endpoint. |
| *****************************************************************************/ |
| static void edge_bulk_in_callback(struct urb *urb) |
| { |
| struct edgeport_serial *edge_serial = urb->context; |
| struct device *dev; |
| unsigned char *data = urb->transfer_buffer; |
| int retval; |
| __u16 raw_data_length; |
| int status = urb->status; |
| |
| if (status) { |
| dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", |
| __func__, status); |
| edge_serial->read_in_progress = false; |
| return; |
| } |
| |
| if (urb->actual_length == 0) { |
| dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__); |
| edge_serial->read_in_progress = false; |
| return; |
| } |
| |
| dev = &edge_serial->serial->dev->dev; |
| raw_data_length = urb->actual_length; |
| |
| usb_serial_debug_data(dev, __func__, raw_data_length, data); |
| |
| spin_lock(&edge_serial->es_lock); |
| |
| /* decrement our rxBytes available by the number that we just got */ |
| edge_serial->rxBytesAvail -= raw_data_length; |
| |
| dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__, |
| raw_data_length, edge_serial->rxBytesAvail); |
| |
| process_rcvd_data(edge_serial, data, urb->actual_length); |
| |
| /* check to see if there's any more data for us to read */ |
| if (edge_serial->rxBytesAvail > 0) { |
| dev_dbg(dev, "%s - posting a read\n", __func__); |
| retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC); |
| if (retval) { |
| dev_err(dev, |
| "%s - usb_submit_urb(read bulk) failed, retval = %d\n", |
| __func__, retval); |
| edge_serial->read_in_progress = false; |
| } |
| } else { |
| edge_serial->read_in_progress = false; |
| } |
| |
| spin_unlock(&edge_serial->es_lock); |
| } |
| |
| |
| /***************************************************************************** |
| * edge_bulk_out_data_callback |
| * this is the callback function for when we have finished sending |
| * serial data on the bulk out endpoint. |
| *****************************************************************************/ |
| static void edge_bulk_out_data_callback(struct urb *urb) |
| { |
| struct edgeport_port *edge_port = urb->context; |
| struct tty_struct *tty; |
| int status = urb->status; |
| |
| if (status) { |
| dev_dbg(&urb->dev->dev, |
| "%s - nonzero write bulk status received: %d\n", |
| __func__, status); |
| } |
| |
| tty = tty_port_tty_get(&edge_port->port->port); |
| |
| if (tty && edge_port->open) { |
| /* let the tty driver wakeup if it has a special |
| write_wakeup function */ |
| tty_wakeup(tty); |
| } |
| tty_kref_put(tty); |
| |
| /* Release the Write URB */ |
| edge_port->write_in_progress = false; |
| |
| /* Check if more data needs to be sent */ |
| send_more_port_data((struct edgeport_serial *) |
| (usb_get_serial_data(edge_port->port->serial)), edge_port); |
| } |
| |
| |
| /***************************************************************************** |
| * BulkOutCmdCallback |
| * this is the callback function for when we have finished sending a |
| * command on the bulk out endpoint. |
| *****************************************************************************/ |
| static void edge_bulk_out_cmd_callback(struct urb *urb) |
| { |
| struct edgeport_port *edge_port = urb->context; |
| struct tty_struct *tty; |
| int status = urb->status; |
| |
| atomic_dec(&CmdUrbs); |
| dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n", |
| __func__, urb, atomic_read(&CmdUrbs)); |
| |
| |
| /* clean up the transfer buffer */ |
| kfree(urb->transfer_buffer); |
| |
| /* Free the command urb */ |
| usb_free_urb(urb); |
| |
| if (status) { |
| dev_dbg(&urb->dev->dev, |
| "%s - nonzero write bulk status received: %d\n", |
| __func__, status); |
| return; |
| } |
| |
| /* Get pointer to tty */ |
| tty = tty_port_tty_get(&edge_port->port->port); |
| |
| /* tell the tty driver that something has changed */ |
| if (tty && edge_port->open) |
| tty_wakeup(tty); |
| tty_kref_put(tty); |
| |
| /* we have completed the command */ |
| edge_port->commandPending = false; |
| wake_up(&edge_port->wait_command); |
| } |
| |
| |
| /***************************************************************************** |
| * Driver tty interface functions |
| *****************************************************************************/ |
| |
| /***************************************************************************** |
| * SerialOpen |
| * this function is called by the tty driver when a port is opened |
| * If successful, we return 0 |
| * Otherwise we return a negative error number. |
| *****************************************************************************/ |
| static int edge_open(struct tty_struct *tty, struct usb_serial_port *port) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| struct device *dev = &port->dev; |
| struct usb_serial *serial; |
| struct edgeport_serial *edge_serial; |
| int response; |
| |
| if (edge_port == NULL) |
| return -ENODEV; |
| |
| /* see if we've set up our endpoint info yet (can't set it up |
| in edge_startup as the structures were not set up at that time.) */ |
| serial = port->serial; |
| edge_serial = usb_get_serial_data(serial); |
| if (edge_serial == NULL) |
| return -ENODEV; |
| if (edge_serial->interrupt_in_buffer == NULL) { |
| struct usb_serial_port *port0 = serial->port[0]; |
| |
| /* not set up yet, so do it now */ |
| edge_serial->interrupt_in_buffer = |
| port0->interrupt_in_buffer; |
| edge_serial->interrupt_in_endpoint = |
| port0->interrupt_in_endpointAddress; |
| edge_serial->interrupt_read_urb = port0->interrupt_in_urb; |
| edge_serial->bulk_in_buffer = port0->bulk_in_buffer; |
| edge_serial->bulk_in_endpoint = |
| port0->bulk_in_endpointAddress; |
| edge_serial->read_urb = port0->read_urb; |
| edge_serial->bulk_out_endpoint = |
| port0->bulk_out_endpointAddress; |
| |
| /* set up our interrupt urb */ |
| usb_fill_int_urb(edge_serial->interrupt_read_urb, |
| serial->dev, |
| usb_rcvintpipe(serial->dev, |
| port0->interrupt_in_endpointAddress), |
| port0->interrupt_in_buffer, |
| edge_serial->interrupt_read_urb->transfer_buffer_length, |
| edge_interrupt_callback, edge_serial, |
| edge_serial->interrupt_read_urb->interval); |
| |
| /* set up our bulk in urb */ |
| usb_fill_bulk_urb(edge_serial->read_urb, serial->dev, |
| usb_rcvbulkpipe(serial->dev, |
| port0->bulk_in_endpointAddress), |
| port0->bulk_in_buffer, |
| edge_serial->read_urb->transfer_buffer_length, |
| edge_bulk_in_callback, edge_serial); |
| edge_serial->read_in_progress = false; |
| |
| /* start interrupt read for this edgeport |
| * this interrupt will continue as long |
| * as the edgeport is connected */ |
| response = usb_submit_urb(edge_serial->interrupt_read_urb, |
| GFP_KERNEL); |
| if (response) { |
| dev_err(dev, "%s - Error %d submitting control urb\n", |
| __func__, response); |
| } |
| } |
| |
| /* initialize our wait queues */ |
| init_waitqueue_head(&edge_port->wait_open); |
| init_waitqueue_head(&edge_port->wait_chase); |
| init_waitqueue_head(&edge_port->delta_msr_wait); |
| init_waitqueue_head(&edge_port->wait_command); |
| |
| /* initialize our icount structure */ |
| memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount)); |
| |
| /* initialize our port settings */ |
| edge_port->txCredits = 0; /* Can't send any data yet */ |
| /* Must always set this bit to enable ints! */ |
| edge_port->shadowMCR = MCR_MASTER_IE; |
| edge_port->chaseResponsePending = false; |
| |
| /* send a open port command */ |
| edge_port->openPending = true; |
| edge_port->open = false; |
| response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0); |
| |
| if (response < 0) { |
| dev_err(dev, "%s - error sending open port command\n", __func__); |
| edge_port->openPending = false; |
| return -ENODEV; |
| } |
| |
| /* now wait for the port to be completely opened */ |
| wait_event_timeout(edge_port->wait_open, !edge_port->openPending, |
| OPEN_TIMEOUT); |
| |
| if (!edge_port->open) { |
| /* open timed out */ |
| dev_dbg(dev, "%s - open timedout\n", __func__); |
| edge_port->openPending = false; |
| return -ENODEV; |
| } |
| |
| /* create the txfifo */ |
| edge_port->txfifo.head = 0; |
| edge_port->txfifo.tail = 0; |
| edge_port->txfifo.count = 0; |
| edge_port->txfifo.size = edge_port->maxTxCredits; |
| edge_port->txfifo.fifo = kmalloc(edge_port->maxTxCredits, GFP_KERNEL); |
| |
| if (!edge_port->txfifo.fifo) { |
| dev_dbg(dev, "%s - no memory\n", __func__); |
| edge_close(port); |
| return -ENOMEM; |
| } |
| |
| /* Allocate a URB for the write */ |
| edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL); |
| edge_port->write_in_progress = false; |
| |
| if (!edge_port->write_urb) { |
| dev_dbg(dev, "%s - no memory\n", __func__); |
| edge_close(port); |
| return -ENOMEM; |
| } |
| |
| dev_dbg(dev, "%s(%d) - Initialize TX fifo to %d bytes\n", |
| __func__, port->number, edge_port->maxTxCredits); |
| |
| return 0; |
| } |
| |
| |
| /************************************************************************ |
| * |
| * block_until_chase_response |
| * |
| * This function will block the close until one of the following: |
| * 1. Response to our Chase comes from Edgeport |
| * 2. A timeout of 10 seconds without activity has expired |
| * (1K of Edgeport data @ 2400 baud ==> 4 sec to empty) |
| * |
| ************************************************************************/ |
| static void block_until_chase_response(struct edgeport_port *edge_port) |
| { |
| struct device *dev = &edge_port->port->dev; |
| DEFINE_WAIT(wait); |
| __u16 lastCredits; |
| int timeout = 1*HZ; |
| int loop = 10; |
| |
| while (1) { |
| /* Save Last credits */ |
| lastCredits = edge_port->txCredits; |
| |
| /* Did we get our Chase response */ |
| if (!edge_port->chaseResponsePending) { |
| dev_dbg(dev, "%s - Got Chase Response\n", __func__); |
| |
| /* did we get all of our credit back? */ |
| if (edge_port->txCredits == edge_port->maxTxCredits) { |
| dev_dbg(dev, "%s - Got all credits\n", __func__); |
| return; |
| } |
| } |
| |
| /* Block the thread for a while */ |
| prepare_to_wait(&edge_port->wait_chase, &wait, |
| TASK_UNINTERRUPTIBLE); |
| schedule_timeout(timeout); |
| finish_wait(&edge_port->wait_chase, &wait); |
| |
| if (lastCredits == edge_port->txCredits) { |
| /* No activity.. count down. */ |
| loop--; |
| if (loop == 0) { |
| edge_port->chaseResponsePending = false; |
| dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__); |
| return; |
| } |
| } else { |
| /* Reset timeout value back to 10 seconds */ |
| dev_dbg(dev, "%s - Last %d, Current %d\n", __func__, |
| lastCredits, edge_port->txCredits); |
| loop = 10; |
| } |
| } |
| } |
| |
| |
| /************************************************************************ |
| * |
| * block_until_tx_empty |
| * |
| * This function will block the close until one of the following: |
| * 1. TX count are 0 |
| * 2. The edgeport has stopped |
| * 3. A timeout of 3 seconds without activity has expired |
| * |
| ************************************************************************/ |
| static void block_until_tx_empty(struct edgeport_port *edge_port) |
| { |
| struct device *dev = &edge_port->port->dev; |
| DEFINE_WAIT(wait); |
| struct TxFifo *fifo = &edge_port->txfifo; |
| __u32 lastCount; |
| int timeout = HZ/10; |
| int loop = 30; |
| |
| while (1) { |
| /* Save Last count */ |
| lastCount = fifo->count; |
| |
| /* Is the Edgeport Buffer empty? */ |
| if (lastCount == 0) { |
| dev_dbg(dev, "%s - TX Buffer Empty\n", __func__); |
| return; |
| } |
| |
| /* Block the thread for a while */ |
| prepare_to_wait(&edge_port->wait_chase, &wait, |
| TASK_UNINTERRUPTIBLE); |
| schedule_timeout(timeout); |
| finish_wait(&edge_port->wait_chase, &wait); |
| |
| dev_dbg(dev, "%s wait\n", __func__); |
| |
| if (lastCount == fifo->count) { |
| /* No activity.. count down. */ |
| loop--; |
| if (loop == 0) { |
| dev_dbg(dev, "%s - TIMEOUT\n", __func__); |
| return; |
| } |
| } else { |
| /* Reset timeout value back to seconds */ |
| loop = 30; |
| } |
| } |
| } |
| |
| |
| /***************************************************************************** |
| * edge_close |
| * this function is called by the tty driver when a port is closed |
| *****************************************************************************/ |
| static void edge_close(struct usb_serial_port *port) |
| { |
| struct edgeport_serial *edge_serial; |
| struct edgeport_port *edge_port; |
| int status; |
| |
| edge_serial = usb_get_serial_data(port->serial); |
| edge_port = usb_get_serial_port_data(port); |
| if (edge_serial == NULL || edge_port == NULL) |
| return; |
| |
| /* block until tx is empty */ |
| block_until_tx_empty(edge_port); |
| |
| edge_port->closePending = true; |
| |
| if ((!edge_serial->is_epic) || |
| ((edge_serial->is_epic) && |
| (edge_serial->epic_descriptor.Supports.IOSPChase))) { |
| /* flush and chase */ |
| edge_port->chaseResponsePending = true; |
| |
| dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__); |
| status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); |
| if (status == 0) |
| /* block until chase finished */ |
| block_until_chase_response(edge_port); |
| else |
| edge_port->chaseResponsePending = false; |
| } |
| |
| if ((!edge_serial->is_epic) || |
| ((edge_serial->is_epic) && |
| (edge_serial->epic_descriptor.Supports.IOSPClose))) { |
| /* close the port */ |
| dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__); |
| send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0); |
| } |
| |
| /* port->close = true; */ |
| edge_port->closePending = false; |
| edge_port->open = false; |
| edge_port->openPending = false; |
| |
| usb_kill_urb(edge_port->write_urb); |
| |
| if (edge_port->write_urb) { |
| /* if this urb had a transfer buffer already |
| (old transfer) free it */ |
| kfree(edge_port->write_urb->transfer_buffer); |
| usb_free_urb(edge_port->write_urb); |
| edge_port->write_urb = NULL; |
| } |
| kfree(edge_port->txfifo.fifo); |
| edge_port->txfifo.fifo = NULL; |
| } |
| |
| /***************************************************************************** |
| * SerialWrite |
| * this function is called by the tty driver when data should be written |
| * to the port. |
| * If successful, we return the number of bytes written, otherwise we |
| * return a negative error number. |
| *****************************************************************************/ |
| static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, |
| const unsigned char *data, int count) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| struct TxFifo *fifo; |
| int copySize; |
| int bytesleft; |
| int firsthalf; |
| int secondhalf; |
| unsigned long flags; |
| |
| if (edge_port == NULL) |
| return -ENODEV; |
| |
| /* get a pointer to the Tx fifo */ |
| fifo = &edge_port->txfifo; |
| |
| spin_lock_irqsave(&edge_port->ep_lock, flags); |
| |
| /* calculate number of bytes to put in fifo */ |
| copySize = min((unsigned int)count, |
| (edge_port->txCredits - fifo->count)); |
| |
| dev_dbg(&port->dev, "%s(%d) of %d byte(s) Fifo room %d -- will copy %d bytes\n", |
| __func__, port->number, count, |
| edge_port->txCredits - fifo->count, copySize); |
| |
| /* catch writes of 0 bytes which the tty driver likes to give us, |
| and when txCredits is empty */ |
| if (copySize == 0) { |
| dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__); |
| goto finish_write; |
| } |
| |
| /* queue the data |
| * since we can never overflow the buffer we do not have to check for a |
| * full condition |
| * |
| * the copy is done is two parts -- first fill to the end of the buffer |
| * then copy the reset from the start of the buffer |
| */ |
| bytesleft = fifo->size - fifo->head; |
| firsthalf = min(bytesleft, copySize); |
| dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__, |
| firsthalf, bytesleft); |
| |
| /* now copy our data */ |
| memcpy(&fifo->fifo[fifo->head], data, firsthalf); |
| usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]); |
| |
| /* update the index and size */ |
| fifo->head += firsthalf; |
| fifo->count += firsthalf; |
| |
| /* wrap the index */ |
| if (fifo->head == fifo->size) |
| fifo->head = 0; |
| |
| secondhalf = copySize-firsthalf; |
| |
| if (secondhalf) { |
| dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf); |
| memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf); |
| usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]); |
| /* update the index and size */ |
| fifo->count += secondhalf; |
| fifo->head += secondhalf; |
| /* No need to check for wrap since we can not get to end of |
| * the fifo in this part |
| */ |
| } |
| |
| finish_write: |
| spin_unlock_irqrestore(&edge_port->ep_lock, flags); |
| |
| send_more_port_data((struct edgeport_serial *) |
| usb_get_serial_data(port->serial), edge_port); |
| |
| dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n", |
| __func__, copySize, edge_port->txCredits, fifo->count); |
| |
| return copySize; |
| } |
| |
| |
| /************************************************************************ |
| * |
| * send_more_port_data() |
| * |
| * This routine attempts to write additional UART transmit data |
| * to a port over the USB bulk pipe. It is called (1) when new |
| * data has been written to a port's TxBuffer from higher layers |
| * (2) when the peripheral sends us additional TxCredits indicating |
| * that it can accept more Tx data for a given port; and (3) when |
| * a bulk write completes successfully and we want to see if we |
| * can transmit more. |
| * |
| ************************************************************************/ |
| static void send_more_port_data(struct edgeport_serial *edge_serial, |
| struct edgeport_port *edge_port) |
| { |
| struct TxFifo *fifo = &edge_port->txfifo; |
| struct device *dev = &edge_port->port->dev; |
| struct urb *urb; |
| unsigned char *buffer; |
| int status; |
| int count; |
| int bytesleft; |
| int firsthalf; |
| int secondhalf; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&edge_port->ep_lock, flags); |
| |
| if (edge_port->write_in_progress || |
| !edge_port->open || |
| (fifo->count == 0)) { |
| dev_dbg(dev, "%s(%d) EXIT - fifo %d, PendingWrite = %d\n", |
| __func__, edge_port->port->number, |
| fifo->count, edge_port->write_in_progress); |
| goto exit_send; |
| } |
| |
| /* since the amount of data in the fifo will always fit into the |
| * edgeport buffer we do not need to check the write length |
| * |
| * Do we have enough credits for this port to make it worthwhile |
| * to bother queueing a write. If it's too small, say a few bytes, |
| * it's better to wait for more credits so we can do a larger write. |
| */ |
| if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) { |
| dev_dbg(dev, "%s(%d) Not enough credit - fifo %d TxCredit %d\n", |
| __func__, edge_port->port->number, fifo->count, |
| edge_port->txCredits); |
| goto exit_send; |
| } |
| |
| /* lock this write */ |
| edge_port->write_in_progress = true; |
| |
| /* get a pointer to the write_urb */ |
| urb = edge_port->write_urb; |
| |
| /* make sure transfer buffer is freed */ |
| kfree(urb->transfer_buffer); |
| urb->transfer_buffer = NULL; |
| |
| /* build the data header for the buffer and port that we are about |
| to send out */ |
| count = fifo->count; |
| buffer = kmalloc(count+2, GFP_ATOMIC); |
| if (buffer == NULL) { |
| dev_err_console(edge_port->port, |
| "%s - no more kernel memory...\n", __func__); |
| edge_port->write_in_progress = false; |
| goto exit_send; |
| } |
| buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number |
| - edge_port->port->serial->minor, count); |
| buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number |
| - edge_port->port->serial->minor, count); |
| |
| /* now copy our data */ |
| bytesleft = fifo->size - fifo->tail; |
| firsthalf = min(bytesleft, count); |
| memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf); |
| fifo->tail += firsthalf; |
| fifo->count -= firsthalf; |
| if (fifo->tail == fifo->size) |
| fifo->tail = 0; |
| |
| secondhalf = count-firsthalf; |
| if (secondhalf) { |
| memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], |
| secondhalf); |
| fifo->tail += secondhalf; |
| fifo->count -= secondhalf; |
| } |
| |
| if (count) |
| usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]); |
| |
| /* fill up the urb with all of our data and submit it */ |
| usb_fill_bulk_urb(urb, edge_serial->serial->dev, |
| usb_sndbulkpipe(edge_serial->serial->dev, |
| edge_serial->bulk_out_endpoint), |
| buffer, count+2, |
| edge_bulk_out_data_callback, edge_port); |
| |
| /* decrement the number of credits we have by the number we just sent */ |
| edge_port->txCredits -= count; |
| edge_port->icount.tx += count; |
| |
| status = usb_submit_urb(urb, GFP_ATOMIC); |
| if (status) { |
| /* something went wrong */ |
| dev_err_console(edge_port->port, |
| "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", |
| __func__, status); |
| edge_port->write_in_progress = false; |
| |
| /* revert the credits as something bad happened. */ |
| edge_port->txCredits += count; |
| edge_port->icount.tx -= count; |
| } |
| dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n", |
| __func__, count, edge_port->txCredits, fifo->count); |
| |
| exit_send: |
| spin_unlock_irqrestore(&edge_port->ep_lock, flags); |
| } |
| |
| |
| /***************************************************************************** |
| * edge_write_room |
| * this function is called by the tty driver when it wants to know how |
| * many bytes of data we can accept for a specific port. If successful, |
| * we return the amount of room that we have for this port (the txCredits) |
| * otherwise we return a negative error number. |
| *****************************************************************************/ |
| static int edge_write_room(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| int room; |
| unsigned long flags; |
| |
| if (edge_port == NULL) |
| return 0; |
| if (edge_port->closePending) |
| return 0; |
| |
| if (!edge_port->open) { |
| dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
| return 0; |
| } |
| |
| /* total of both buffers is still txCredit */ |
| spin_lock_irqsave(&edge_port->ep_lock, flags); |
| room = edge_port->txCredits - edge_port->txfifo.count; |
| spin_unlock_irqrestore(&edge_port->ep_lock, flags); |
| |
| dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
| return room; |
| } |
| |
| |
| /***************************************************************************** |
| * edge_chars_in_buffer |
| * this function is called by the tty driver when it wants to know how |
| * many bytes of data we currently have outstanding in the port (data that |
| * has been written, but hasn't made it out the port yet) |
| * If successful, we return the number of bytes left to be written in the |
| * system, |
| * Otherwise we return a negative error number. |
| *****************************************************************************/ |
| static int edge_chars_in_buffer(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| int num_chars; |
| unsigned long flags; |
| |
| if (edge_port == NULL) |
| return 0; |
| if (edge_port->closePending) |
| return 0; |
| |
| if (!edge_port->open) { |
| dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
| return 0; |
| } |
| |
| spin_lock_irqsave(&edge_port->ep_lock, flags); |
| num_chars = edge_port->maxTxCredits - edge_port->txCredits + |
| edge_port->txfifo.count; |
| spin_unlock_irqrestore(&edge_port->ep_lock, flags); |
| if (num_chars) { |
| dev_dbg(&port->dev, "%s(port %d) - returns %d\n", __func__, |
| port->number, num_chars); |
| } |
| |
| return num_chars; |
| } |
| |
| |
| /***************************************************************************** |
| * SerialThrottle |
| * this function is called by the tty driver when it wants to stop the data |
| * being read from the port. |
| *****************************************************************************/ |
| static void edge_throttle(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| int status; |
| |
| if (edge_port == NULL) |
| return; |
| |
| if (!edge_port->open) { |
| dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
| return; |
| } |
| |
| /* if we are implementing XON/XOFF, send the stop character */ |
| if (I_IXOFF(tty)) { |
| unsigned char stop_char = STOP_CHAR(tty); |
| status = edge_write(tty, port, &stop_char, 1); |
| if (status <= 0) |
| return; |
| } |
| |
| /* if we are implementing RTS/CTS, toggle that line */ |
| if (tty->termios.c_cflag & CRTSCTS) { |
| edge_port->shadowMCR &= ~MCR_RTS; |
| status = send_cmd_write_uart_register(edge_port, MCR, |
| edge_port->shadowMCR); |
| if (status != 0) |
| return; |
| } |
| } |
| |
| |
| /***************************************************************************** |
| * edge_unthrottle |
| * this function is called by the tty driver when it wants to resume the |
| * data being read from the port (called after SerialThrottle is called) |
| *****************************************************************************/ |
| static void edge_unthrottle(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| int status; |
| |
| if (edge_port == NULL) |
| return; |
| |
| if (!edge_port->open) { |
| dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
| return; |
| } |
| |
| /* if we are implementing XON/XOFF, send the start character */ |
| if (I_IXOFF(tty)) { |
| unsigned char start_char = START_CHAR(tty); |
| status = edge_write(tty, port, &start_char, 1); |
| if (status <= 0) |
| return; |
| } |
| /* if we are implementing RTS/CTS, toggle that line */ |
| if (tty->termios.c_cflag & CRTSCTS) { |
| edge_port->shadowMCR |= MCR_RTS; |
| send_cmd_write_uart_register(edge_port, MCR, |
| edge_port->shadowMCR); |
| } |
| } |
| |
| |
| /***************************************************************************** |
| * SerialSetTermios |
| * this function is called by the tty driver when it wants to change |
| * the termios structure |
| *****************************************************************************/ |
| static void edge_set_termios(struct tty_struct *tty, |
| struct usb_serial_port *port, struct ktermios *old_termios) |
| { |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| unsigned int cflag; |
| |
| cflag = tty->termios.c_cflag; |
| dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag); |
| dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag); |
| |
| if (edge_port == NULL) |
| return; |
| |
| if (!edge_port->open) { |
| dev_dbg(&port->dev, "%s - port not opened\n", __func__); |
| return; |
| } |
| |
| /* change the port settings to the new ones specified */ |
| change_port_settings(tty, edge_port, old_termios); |
| } |
| |
| |
| /***************************************************************************** |
| * get_lsr_info - get line status register info |
| * |
| * Purpose: Let user call ioctl() to get info when the UART physically |
| * is emptied. On bus types like RS485, the transmitter must |
| * release the bus after transmitting. This must be done when |
| * the transmit shift register is empty, not be done when the |
| * transmit holding register is empty. This functionality |
| * allows an RS485 driver to be written in user space. |
| *****************************************************************************/ |
| static int get_lsr_info(struct edgeport_port *edge_port, |
| unsigned int __user *value) |
| { |
| unsigned int result = 0; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&edge_port->ep_lock, flags); |
| if (edge_port->maxTxCredits == edge_port->txCredits && |
| edge_port->txfifo.count == 0) { |
| dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__); |
| result = TIOCSER_TEMT; |
| } |
| spin_unlock_irqrestore(&edge_port->ep_lock, flags); |
| |
| if (copy_to_user(value, &result, sizeof(int))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| static int edge_tiocmset(struct tty_struct *tty, |
| unsigned int set, unsigned int clear) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| unsigned int mcr; |
| |
| mcr = edge_port->shadowMCR; |
| if (set & TIOCM_RTS) |
| mcr |= MCR_RTS; |
| if (set & TIOCM_DTR) |
| mcr |= MCR_DTR; |
| if (set & TIOCM_LOOP) |
| mcr |= MCR_LOOPBACK; |
| |
| if (clear & TIOCM_RTS) |
| mcr &= ~MCR_RTS; |
| if (clear & TIOCM_DTR) |
| mcr &= ~MCR_DTR; |
| if (clear & TIOCM_LOOP) |
| mcr &= ~MCR_LOOPBACK; |
| |
| edge_port->shadowMCR = mcr; |
| |
| send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); |
| |
| return 0; |
| } |
| |
| static int edge_tiocmget(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| unsigned int result = 0; |
| unsigned int msr; |
| unsigned int mcr; |
| |
| msr = edge_port->shadowMSR; |
| mcr = edge_port->shadowMCR; |
| result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ |
| | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ |
| | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ |
| | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ |
| | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ |
| | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ |
| |
| return result; |
| } |
| |
| static int edge_get_icount(struct tty_struct *tty, |
| struct serial_icounter_struct *icount) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| struct async_icount cnow; |
| cnow = edge_port->icount; |
| |
| icount->cts = cnow.cts; |
| icount->dsr = cnow.dsr; |
| icount->rng = cnow.rng; |
| icount->dcd = cnow.dcd; |
| icount->rx = cnow.rx; |
| icount->tx = cnow.tx; |
| icount->frame = cnow.frame; |
| icount->overrun = cnow.overrun; |
| icount->parity = cnow.parity; |
| icount->brk = cnow.brk; |
| icount->buf_overrun = cnow.buf_overrun; |
| |
| dev_dbg(&port->dev, "%s (%d) TIOCGICOUNT RX=%d, TX=%d\n", __func__, |
| port->number, icount->rx, icount->tx); |
| return 0; |
| } |
| |
| static int get_serial_info(struct edgeport_port *edge_port, |
| struct serial_struct __user *retinfo) |
| { |
| struct serial_struct tmp; |
| |
| if (!retinfo) |
| return -EFAULT; |
| |
| memset(&tmp, 0, sizeof(tmp)); |
| |
| tmp.type = PORT_16550A; |
| tmp.line = edge_port->port->serial->minor; |
| tmp.port = edge_port->port->number; |
| tmp.irq = 0; |
| tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; |
| tmp.xmit_fifo_size = edge_port->maxTxCredits; |
| tmp.baud_base = 9600; |
| tmp.close_delay = 5*HZ; |
| tmp.closing_wait = 30*HZ; |
| |
| if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| |
| /***************************************************************************** |
| * SerialIoctl |
| * this function handles any ioctl calls to the driver |
| *****************************************************************************/ |
| static int edge_ioctl(struct tty_struct *tty, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| DEFINE_WAIT(wait); |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| struct async_icount cnow; |
| struct async_icount cprev; |
| |
| dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd); |
| |
| switch (cmd) { |
| case TIOCSERGETLSR: |
| dev_dbg(&port->dev, "%s (%d) TIOCSERGETLSR\n", __func__, port->number); |
| return get_lsr_info(edge_port, (unsigned int __user *) arg); |
| |
| case TIOCGSERIAL: |
| dev_dbg(&port->dev, "%s (%d) TIOCGSERIAL\n", __func__, port->number); |
| return get_serial_info(edge_port, (struct serial_struct __user *) arg); |
| |
| case TIOCMIWAIT: |
| dev_dbg(&port->dev, "%s (%d) TIOCMIWAIT\n", __func__, port->number); |
| cprev = edge_port->icount; |
| while (1) { |
| prepare_to_wait(&edge_port->delta_msr_wait, |
| &wait, TASK_INTERRUPTIBLE); |
| schedule(); |
| finish_wait(&edge_port->delta_msr_wait, &wait); |
| /* see if a signal did it */ |
| if (signal_pending(current)) |
| return -ERESTARTSYS; |
| cnow = edge_port->icount; |
| if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
| cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) |
| return -EIO; /* no change => error */ |
| if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || |
| ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || |
| ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || |
| ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { |
| return 0; |
| } |
| cprev = cnow; |
| } |
| /* NOTREACHED */ |
| break; |
| |
| } |
| return -ENOIOCTLCMD; |
| } |
| |
| |
| /***************************************************************************** |
| * SerialBreak |
| * this function sends a break to the port |
| *****************************************************************************/ |
| static void edge_break(struct tty_struct *tty, int break_state) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct edgeport_port *edge_port = usb_get_serial_port_data(port); |
| struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial); |
| int status; |
| |
| if ((!edge_serial->is_epic) || |
| ((edge_serial->is_epic) && |
| (edge_serial->epic_descriptor.Supports.IOSPChase))) { |
| /* flush and chase */ |
| edge_port->chaseResponsePending = true; |
| |
| dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__); |
| status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0); |
| if (status == 0) { |
| /* block until chase finished */ |
| block_until_chase_response(edge_port); |
| } else { |
| edge_port->chaseResponsePending = false; |
| } |
| } |
| |
| if ((!edge_serial->is_epic) || |
| ((edge_serial->is_epic) && |
| (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) { |
| if (break_state == -1) { |
| dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__); |
| status = send_iosp_ext_cmd(edge_port, |
| IOSP_CMD_SET_BREAK, 0); |
| } else { |
| dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__); |
| status = send_iosp_ext_cmd(edge_port, |
| IOSP_CMD_CLEAR_BREAK, 0); |
| } |
| if (status) |
| dev_dbg(&port->dev, "%s - error sending break set/clear command.\n", |
| __func__); |
| } |
| } |
| |
| |
| /***************************************************************************** |
| * process_rcvd_data |
| * this function handles the data received on the bulk in pipe. |
| *****************************************************************************/ |
| static void process_rcvd_data(struct edgeport_serial *edge_serial, |
| unsigned char *buffer, __u16 bufferLength) |
| { |
| struct device *dev = &edge_serial->serial->dev->dev; |
| struct usb_serial_port *port; |
| struct edgeport_port *edge_port; |
| __u16 lastBufferLength; |
| __u16 rxLen; |
| |
| lastBufferLength = bufferLength + 1; |
| |
| while (bufferLength > 0) { |
| /* failsafe incase we get a message that we don't understand */ |
| if (lastBufferLength == bufferLength) { |
| dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__); |
| break; |
| } |
| lastBufferLength = bufferLength; |
| |
| switch (edge_serial->rxState) { |
| case EXPECT_HDR1: |
| edge_serial->rxHeader1 = *buffer; |
| ++buffer; |
| --bufferLength; |
| |
| if (bufferLength == 0) { |
| edge_serial->rxState = EXPECT_HDR2; |
| break; |
| } |
| /* otherwise, drop on through */ |
| case EXPECT_HDR2: |
| edge_serial->rxHeader2 = *buffer; |
| ++buffer; |
| --bufferLength; |
| |
| dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__, |
| edge_serial->rxHeader1, edge_serial->rxHeader2); |
| /* Process depending on whether this header is |
| * data or status */ |
| |
| if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) { |
| /* Decode this status header and go to |
| * EXPECT_HDR1 (if we can process the status |
| * with only 2 bytes), or go to EXPECT_HDR3 to |
| * get the third byte. */ |
| edge_serial->rxPort = |
| IOSP_GET_HDR_PORT(edge_serial->rxHeader1); |
| edge_serial->rxStatusCode = |
| IOSP_GET_STATUS_CODE( |
| edge_serial->rxHeader1); |
| |
| if (!IOSP_STATUS_IS_2BYTE( |
| edge_serial->rxStatusCode)) { |
| /* This status needs additional bytes. |
| * Save what we have and then wait for |
| * more data. |
| */ |
| edge_serial->rxStatusParam |
| = edge_serial->rxHeader2; |
| edge_serial->rxState = EXPECT_HDR3; |
| break; |
| } |
| /* We have all the header bytes, process the |
| status now */ |
| process_rcvd_status(edge_serial, |
| edge_serial->rxHeader2, 0); |
| edge_serial->rxState = EXPECT_HDR1; |
| break; |
| } else { |
| edge_serial->rxPort = |
| IOSP_GET_HDR_PORT(edge_serial->rxHeader1); |
| edge_serial->rxBytesRemaining = |
| IOSP_GET_HDR_DATA_LEN( |
| edge_serial->rxHeader1, |
| edge_serial->rxHeader2); |
| dev_dbg(dev, "%s - Data for Port %u Len %u\n", |
| __func__, |
| edge_serial->rxPort, |
| edge_serial->rxBytesRemaining); |
| |
| /* ASSERT(DevExt->RxPort < DevExt->NumPorts); |
| * ASSERT(DevExt->RxBytesRemaining < |
| * IOSP_MAX_DATA_LENGTH); |
| */ |
| |
| if (bufferLength == 0) { |
| edge_serial->rxState = EXPECT_DATA; |
| break; |
| } |
| /* Else, drop through */ |
| } |
| case EXPECT_DATA: /* Expect data */ |
| if (bufferLength < edge_serial->rxBytesRemaining) { |
| rxLen = bufferLength; |
| /* Expect data to start next buffer */ |
| edge_serial->rxState = EXPECT_DATA; |
| } else { |
| /* BufLen >= RxBytesRemaining */ |
| rxLen = edge_serial->rxBytesRemaining; |
| /* Start another header next time */ |
| edge_serial->rxState = EXPECT_HDR1; |
| } |
| |
| bufferLength -= rxLen; |
| edge_serial->rxBytesRemaining -= rxLen; |
| |
| /* spit this data back into the tty driver if this |
| port is open */ |
| if (rxLen) { |
| port = edge_serial->serial->port[ |
| edge_serial->rxPort]; |
| edge_port = usb_get_serial_port_data(port); |
| if (edge_port->open) { |
| dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n", |
| __func__, rxLen, |
| edge_serial->rxPort); |
| edge_tty_recv(edge_port->port, buffer, |
| rxLen); |
| edge_port->icount.rx += rxLen; |
| } |
| buffer += rxLen; |
| } |
| break; |
| |
| case EXPECT_HDR3: /* Expect 3rd byte of status header */ |
| edge_serial->rxHeader3 = *buffer; |
| ++buffer; |
| --bufferLength; |
| |
| /* We have all the header bytes, process the |
| status now */ |
| process_rcvd_status(edge_serial, |
| edge_serial->rxStatusParam, |
| edge_serial->rxHeader3); |
| edge_serial->rxState = EXPECT_HDR1; |
| break; |
| } |
| } |
| } |
| |
| |
| /***************************************************************************** |
| * process_rcvd_status |
| * this function handles the any status messages received on the |
| * bulk in pipe. |
| *****************************************************************************/ |
| static void process_rcvd_status(struct edgeport_serial *edge_serial, |
| __u8 byte2, __u8 byte3) |
| { |
| struct usb_serial_port *port; |
| struct edgeport_port *edge_port; |
| struct tty_struct *tty; |
| struct device *dev; |
| __u8 code = edge_serial->rxStatusCode; |
| |
| /* switch the port pointer to the one being currently talked about */ |
| port = edge_serial->serial->port[edge_serial->rxPort]; |
| edge_port = usb_get_serial_port_data(port); |
| if (edge_port == NULL) { |
| dev_err(&edge_serial->serial->dev->dev, |
| "%s - edge_port == NULL for port %d\n", |
| __func__, edge_serial->rxPort); |
| return; |
| } |
| dev = &port->dev; |
| |
| if (code == IOSP_EXT_STATUS) { |
| switch (byte2) { |
| case IOSP_EXT_STATUS_CHASE_RSP: |
| /* we want to do EXT status regardless of port |
| * open/closed */ |
| dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n", |
| __func__, edge_serial->rxPort, byte3); |
| /* Currently, the only EXT_STATUS is Chase, so process |
| * here instead of one more call to one more subroutine |
| * If/when more EXT_STATUS, there'll be more work to do |
| * Also, we currently clear flag and close the port |
| * regardless of content of above's Byte3. |
| * We could choose to do something else when Byte3 says |
| * Timeout on Chase from Edgeport, like wait longer in |
| * block_until_chase_response, but for now we don't. |
| */ |
| edge_port->chaseResponsePending = false; |
| wake_up(&edge_port->wait_chase); |
| return; |
| |
| case IOSP_EXT_STATUS_RX_CHECK_RSP: |
| dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", |
| __func__, edge_serial->rxPort, byte3); |
| /* Port->RxCheckRsp = true; */ |
| return; |
| } |
| } |
| |
| if (code == IOSP_STATUS_OPEN_RSP) { |
| edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3); |
| edge_port->maxTxCredits = edge_port->txCredits; |
| dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n", |
| __func__, edge_serial->rxPort, byte2, edge_port->txCredits); |
| handle_new_msr(edge_port, byte2); |
| |
| /* send the current line settings to the port so we are |
| in sync with any further termios calls */ |
| tty = tty_port_tty_get(&edge_port->port->port); |
| if (tty) { |
| change_port_settings(tty, |
| edge_port, &tty->termios); |
| tty_kref_put(tty); |
| } |
| |
| /* we have completed the open */ |
| edge_port->openPending = false; |
| edge_port->open = true; |
| wake_up(&edge_port->wait_open); |
| return; |
| } |
| |
| /* If port is closed, silently discard all rcvd status. We can |
| * have cases where buffered status is received AFTER the close |
| * port command is sent to the Edgeport. |
| */ |
| if (!edge_port->open || edge_port->closePending) |
| return; |
| |
| switch (code) { |
| /* Not currently sent by Edgeport */ |
| case IOSP_STATUS_LSR: |
| dev_dbg(dev, "%s - Port %u LSR Status = %02x\n", |
| __func__, edge_serial->rxPort, byte2); |
| handle_new_lsr(edge_port, false, byte2, 0); |
| break; |
| |
| case IOSP_STATUS_LSR_DATA: |
| dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n", |
| __func__, edge_serial->rxPort, byte2, byte3); |
| /* byte2 is LSR Register */ |
| /* byte3 is broken data byte */ |
| handle_new_lsr(edge_port, true, byte2, byte3); |
| break; |
| /* |
| * case IOSP_EXT_4_STATUS: |
| * dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n", |
| * __func__, edge_serial->rxPort, byte2, byte3); |
| * break; |
| */ |
| case IOSP_STATUS_MSR: |
| dev_dbg(dev, "%s - Port %u MSR Status = %02x\n", |
| __func__, edge_serial->rxPort, byte2); |
| /* |
| * Process this new modem status and generate appropriate |
| * events, etc, based on the new status. This routine |
| * also saves the MSR in Port->ShadowMsr. |
| */ |
| handle_new_msr(edge_port, byte2); |
| break; |
| |
| default: |
| dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code); |
| break; |
| } |
| } |
| |
| |
| /***************************************************************************** |
| * edge_tty_recv |
| * this function passes data on to the tty flip buffer |
| *****************************************************************************/ |
| static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, |
| int length) |
| { |
| int cnt; |
| |
| cnt = tty_insert_flip_string(&port->port, data, length); |
| if (cnt < length) { |
| dev_err(&port->dev, "%s - dropping data, %d bytes lost\n", |
| __func__, length - cnt); |
| } |
| data += cnt; |
| length -= cnt; |
| |
| tty_flip_buffer_push(&port->port); |
| } |
| |
| |
| /***************************************************************************** |
| * handle_new_msr |
| * this function handles any change to the msr register for a port. |
| *****************************************************************************/ |
| static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr) |
| { |
| struct async_icount *icount; |
| |
| if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | |
| EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { |
| icount = &edge_port->icount; |
| |
| /* update input line counters */ |
| if (newMsr & EDGEPORT_MSR_DELTA_CTS) |
| icount->cts++; |
| if (newMsr & EDGEPORT_MSR_DELTA_DSR) |
| icount->dsr++; |
| if (newMsr & EDGEPORT_MSR_DELTA_CD) |
| icount->dcd++; |
| if (newMsr & EDGEPORT_MSR_DELTA_RI) |
| icount->rng++; |
| wake_up_interruptible(&edge_port->delta_msr_wait); |
| } |
| |
| /* Save the new modem status */ |
| edge_port->shadowMSR = newMsr & 0xf0; |
| } |
| |
| |
| /***************************************************************************** |
| * handle_new_lsr |
| * this function handles any change to the lsr register for a port. |
| *****************************************************************************/ |
| static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, |
| __u8 lsr, __u8 data) |
| { |
| __u8 newLsr = (__u8) (lsr & (__u8) |
| (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK)); |
| struct async_icount *icount; |
| |
| edge_port->shadowLSR = lsr; |
| |
| if (newLsr & LSR_BREAK) { |
| /* |
| * Parity and Framing errors only count if they |
| * occur exclusive of a break being |
| * received. |
| */ |
| newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); |
| } |
| |
| /* Place LSR data byte into Rx buffer */ |
| if (lsrData) |
| edge_tty_recv(edge_port->port, &data, 1); |
| |
| /* update input line counters */ |
| icount = &edge_port->icount; |
| if (newLsr & LSR_BREAK) |
| icount->brk++; |
| if (newLsr & LSR_OVER_ERR) |
| icount->overrun++; |
| if (newLsr & LSR_PAR_ERR) |
| icount->parity++; |
| if (newLsr & LSR_FRM_ERR) |
| icount->frame++; |
| } |
| |
| |
| /**************************************************************************** |
| * sram_write |
| * writes a number of bytes to the Edgeport device's sram starting at the |
| * given address. |
| * If successful returns the number of bytes written, otherwise it returns |
| * a negative error number of the problem. |
| ****************************************************************************/ |
| static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, |
| __u16 length, const __u8 *data) |
| { |
| int result; |
| __u16 current_length; |
| unsigned char *transfer_buffer; |
| |
| dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length); |
| |
| transfer_buffer = kmalloc(64, GFP_KERNEL); |
| if (!transfer_buffer) { |
| dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", |
| __func__, 64); |
| return -ENOMEM; |
| } |
| |
| /* need to split these writes up into 64 byte chunks */ |
| result = 0; |
| while (length > 0) { |
| if (length > 64) |
| current_length = 64; |
| else |
| current_length = length; |
| |
| /* dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */ |
| memcpy(transfer_buffer, data, current_length); |
| result = usb_control_msg(serial->dev, |
| usb_sndctrlpipe(serial->dev, 0), |
| USB_REQUEST_ION_WRITE_RAM, |
| 0x40, addr, extAddr, transfer_buffer, |
| current_length, 300); |
| if (result < 0) |
| break; |
| length -= current_length; |
| addr += current_length; |
| data += current_length; |
| } |
| |
| kfree(transfer_buffer); |
| return result; |
| } |
| |
| |
| /**************************************************************************** |
| * rom_write |
| * writes a number of bytes to the Edgeport device's ROM starting at the |
| * given address. |
| * If successful returns the number of bytes written, otherwise it returns |
| * a negative error number of the problem. |
| ****************************************************************************/ |
| static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr, |
| __u16 length, const __u8 *data) |
| { |
| int result; |
| __u16 current_length; |
| unsigned char *transfer_buffer; |
| |
| transfer_buffer = kmalloc(64, GFP_KERNEL); |
| if (!transfer_buffer) { |
| dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", |
| __func__, 64); |
| return -ENOMEM; |
| } |
| |
| /* need to split these writes up into 64 byte chunks */ |
| result = 0; |
| while (length > 0) { |
| if (length > 64) |
| current_length = 64; |
| else |
| current_length = length; |
| memcpy(transfer_buffer, data, current_length); |
| result = usb_control_msg(serial->dev, |
| usb_sndctrlpipe(serial->dev, 0), |
| USB_REQUEST_ION_WRITE_ROM, 0x40, |
| addr, extAddr, |
| transfer_buffer, current_length, 300); |
| if (result < 0) |
| break; |
| length -= current_length; |
| addr += current_length; |
| data += current_length; |
| } |
| |
| kfree(transfer_buffer); |
| return result; |
| } |
| |
| |
| /**************************************************************************** |
| * rom_read |
| * reads a number of bytes from the Edgeport device starting at the given |
| * address. |
| * If successful returns the number of bytes read, otherwise it returns |
| * a negative error number of the problem. |
| ****************************************************************************/ |
| static int rom_read(struct usb_serial *serial, __u16 extAddr, |
| __u16 addr, __u16 length, __u8 *data) |
| { |
| int result; |
| __u16 current_length; |
| unsigned char *transfer_buffer; |
| |
| transfer_buffer = kmalloc(64, GFP_KERNEL); |
| if (!transfer_buffer) { |
| dev_err(&serial->dev->dev, |
| "%s - kmalloc(%d) failed.\n", __func__, 64); |
| return -ENOMEM; |
| } |
| |
| /* need to split these reads up into 64 byte chunks */ |
| result = 0; |
| while (length > 0) { |
| if (length > 64) |
| current_length = 64; |
| else |
| current_length = length; |
| result = usb_control_msg(serial->dev, |
| usb_rcvctrlpipe(serial->dev, 0), |
| USB_REQUEST_ION_READ_ROM, |
| 0xC0, addr, extAddr, transfer_buffer, |
| current_length, 300); |
| if (result < 0) |
| break; |
| memcpy(data, transfer_buffer, current_length); |
| length -= current_length; |
| addr += current_length; |
| data += current_length; |
| } |
| |
| kfree(transfer_buffer); |
| return result; |
| } |
| |
| |
| /**************************************************************************** |
| * send_iosp_ext_cmd |
| * Is used to send a IOSP message to the Edgeport device |
| ****************************************************************************/ |
| static int send_iosp_ext_cmd(struct edgeport_port *edge_port, |
| __u8 command, __u8 param) |
| { |
| unsigned char *buffer; |
| unsigned char *currentCommand; |
| int length = 0; |
| int status = 0; |
| |
| buffer = kmalloc(10, GFP_ATOMIC); |
| if (!buffer) { |
| dev_err(&edge_port->port->dev, |
| "%s - kmalloc(%d) failed.\n", __func__, 10); |
| return -ENOMEM; |
| } |
| |
| currentCommand = buffer; |
| |
| MAKE_CMD_EXT_CMD(¤tCommand, &length, |
| edge_port->port->number - edge_port->port->serial->minor, |
| command, param); |
| |
| status = write_cmd_usb(edge_port, buffer, length); |
| if (status) { |
| /* something bad happened, let's free up the memory */ |
| kfree(buffer); |
| } |
| |
| return status; |
| } |
| |
| |
| /***************************************************************************** |
| * write_cmd_usb |
| * this function writes the given buffer out to the bulk write endpoint. |
| *****************************************************************************/ |
| static int write_cmd_usb(struct edgeport_port *edge_port, |
| unsigned char *buffer, int length) |
| { |
| struct edgeport_serial *edge_serial = |
| usb_get_serial_data(edge_port->port->serial); |
| struct device *dev = &edge_port->port->dev; |
| int status = 0; |
| struct urb *urb; |
| |
| usb_serial_debug_data(dev, __func__, length, buffer); |
| |
| /* Allocate our next urb */ |
| urb = usb_alloc_urb(0, GFP_ATOMIC); |
| if (!urb) |
| return -ENOMEM; |
| |
| atomic_inc(&CmdUrbs); |
| dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n", |
| __func__, urb, atomic_read(&CmdUrbs)); |
| |
| usb_fill_bulk_urb(urb, edge_serial->serial->dev, |
| usb_sndbulkpipe(edge_serial->serial->dev, |
| edge_serial->bulk_out_endpoint), |
| buffer, length, edge_bulk_out_cmd_callback, edge_port); |
| |
| edge_port->commandPending = true; |
| status = usb_submit_urb(urb, GFP_ATOMIC); |
| |
| if (status) { |
| /* something went wrong */ |
| dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n", |
| __func__, status); |
| usb_kill_urb(urb); |
| usb_free_urb(urb); |
| atomic_dec(&CmdUrbs); |
| return status; |
| } |
| |
| #if 0 |
| wait_event(&edge_port->wait_command, !edge_port->commandPending); |
| |
| if (edge_port->commandPending) { |
| /* command timed out */ |
| dev_dbg(dev, "%s - command timed out\n", __func__); |
| status = -EINVAL; |
| } |
| #endif |
| return status; |
| } |
| |
| |
| /***************************************************************************** |
| * send_cmd_write_baud_rate |
| * this function sends the proper command to change the baud rate of the |
| * specified port. |
| *****************************************************************************/ |
| static int send_cmd_write_baud_rate(struct edgeport_port *edge_port, |
| int baudRate) |
| { |
| struct edgeport_serial *edge_serial = |
| usb_get_serial_data(edge_port->port->serial); |
| struct device *dev = &edge_port->port->dev; |
| unsigned char *cmdBuffer; |
| unsigned char *currCmd; |
| int cmdLen = 0; |
| int divisor; |
| int status; |
| unsigned char number = |
| edge_port->port->number - edge_port->port->serial->minor; |
| |
| if (edge_serial->is_epic && |
| !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) { |
| dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d\n", |
| edge_port->port->number, baudRate); |
| return 0; |
| } |
| |
| dev_dbg(dev, "%s - port = %d, baud = %d\n", __func__, |
| edge_port->port->number, baudRate); |
| |
| status = calc_baud_rate_divisor(dev, baudRate, &divisor); |
| if (status) { |
| dev_err(dev, "%s - bad baud rate\n", __func__); |
| return status; |
| } |
| |
| /* Alloc memory for the string of commands. */ |
| cmdBuffer = kmalloc(0x100, GFP_ATOMIC); |
| if (!cmdBuffer) { |
| dev_err(dev, "%s - kmalloc(%d) failed.\n", __func__, 0x100); |
| return -ENOMEM; |
| } |
| currCmd = cmdBuffer; |
| |
| /* Enable access to divisor latch */ |
| MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE); |
| |
| /* Write the divisor itself */ |
| MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor)); |
| MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor)); |
| |
| /* Restore original value to disable access to divisor latch */ |
| MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, |
| edge_port->shadowLCR); |
| |
| status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); |
| if (status) { |
| /* something bad happened, let's free up the memory */ |
| kfree(cmdBuffer); |
| } |
| |
| return status; |
| } |
| |
| |
| /***************************************************************************** |
| * calc_baud_rate_divisor |
| * this function calculates the proper baud rate divisor for the specified |
| * baud rate. |
| *****************************************************************************/ |
| static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor) |
| { |
| int i; |
| __u16 custom; |
| |
| for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { |
| if (divisor_table[i].BaudRate == baudrate) { |
| *divisor = divisor_table[i].Divisor; |
| return 0; |
| } |
| } |
| |
| /* We have tried all of the standard baud rates |
| * lets try to calculate the divisor for this baud rate |
| * Make sure the baud rate is reasonable */ |
| if (baudrate > 50 && baudrate < 230400) { |
| /* get divisor */ |
| custom = (__u16)((230400L + baudrate/2) / baudrate); |
| |
| *divisor = custom; |
| |
| dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom); |
| return 0; |
| } |
| |
| return -1; |
| } |
| |
| |
| /***************************************************************************** |
| * send_cmd_write_uart_register |
| * this function builds up a uart register message and sends to the device. |
| *****************************************************************************/ |
| static int send_cmd_write_uart_register(struct edgeport_port *edge_port, |
| __u8 regNum, __u8 regValue) |
| { |
| struct edgeport_serial *edge_serial = |
| usb_get_serial_data(edge_port->port->serial); |
| struct device *dev = &edge_port->port->dev; |
| unsigned char *cmdBuffer; |
| unsigned char *currCmd; |
| unsigned long cmdLen = 0; |
| int status; |
| |
| dev_dbg(dev, "%s - write to %s register 0x%02x\n", |
| (regNum == MCR) ? "MCR" : "LCR", __func__, regValue); |
| |
| if (edge_serial->is_epic && |
| !edge_serial->epic_descriptor.Supports.IOSPWriteMCR && |
| regNum == MCR) { |
| dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n"); |
| return 0; |
| } |
| |
| if (edge_serial->is_epic && |
| !edge_serial->epic_descriptor.Supports.IOSPWriteLCR && |
| regNum == LCR) { |
| dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n"); |
| return 0; |
| } |
| |
| /* Alloc memory for the string of commands. */ |
| cmdBuffer = kmalloc(0x10, GFP_ATOMIC); |
| if (cmdBuffer == NULL) |
| return -ENOMEM; |
| |
| currCmd = cmdBuffer; |
| |
| /* Build a cmd in the buffer to write the given register */ |
| MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, |
| edge_port->port->number - edge_port->port->serial->minor, |
| regNum, regValue); |
| |
| status = write_cmd_usb(edge_port, cmdBuffer, cmdLen); |
| if (status) { |
| /* something bad happened, let's free up the memory */ |
| kfree(cmdBuffer); |
| } |
| |
| return status; |
| } |
| |
| |
| /***************************************************************************** |
| * change_port_settings |
| * This routine is called to set the UART on the device to match the |
| * specified new settings. |
| *****************************************************************************/ |
| |
| static void change_port_settings(struct tty_struct *tty, |
| struct edgeport_port *edge_port, struct ktermios *old_termios) |
| { |
| struct device *dev = &edge_port->port->dev; |
| struct edgeport_serial *edge_serial = |
| usb_get_serial_data(edge_port->port->serial); |
| int baud; |
| unsigned cflag; |
| __u8 mask = 0xff; |
| __u8 lData; |
| __u8 lParity; |
| __u8 lStop; |
| __u8 rxFlow; |
| __u8 txFlow; |
| int status; |
| |
| dev_dbg(dev, "%s - port %d\n", __func__, edge_port->port->number); |
| |
| if (!edge_port->open && |
| !edge_port->openPending) { |
| dev_dbg(dev, "%s - port not opened\n", __func__); |
| return; |
| } |
| |
| cflag = tty->termios.c_cflag; |
| |
| switch (cflag & CSIZE) { |
| case CS5: |
| lData = LCR_BITS_5; mask = 0x1f; |
| dev_dbg(dev, "%s - data bits = 5\n", __func__); |
| break; |
| case CS6: |
| lData = LCR_BITS_6; mask = 0x3f; |
| dev_dbg(dev, "%s - data bits = 6\n", __func__); |
| break; |
| case CS7: |
| lData = LCR_BITS_7; mask = 0x7f; |
| dev_dbg(dev, "%s - data bits = 7\n", __func__); |
| break; |
| default: |
| case CS8: |
| lData = LCR_BITS_8; |
| dev_dbg(dev, "%s - data bits = 8\n", __func__); |
| break; |
| } |
| |
| lParity = LCR_PAR_NONE; |
| if (cflag & PARENB) { |
| if (cflag & CMSPAR) { |
| if (cflag & PARODD) { |
| lParity = LCR_PAR_MARK; |
| dev_dbg(dev, "%s - parity = mark\n", __func__); |
| } else { |
| lParity = LCR_PAR_SPACE; |
| dev_dbg(dev, "%s - parity = space\n", __func__); |
| } |
| } else if (cflag & PARODD) { |
| lParity = LCR_PAR_ODD; |
| dev_dbg(dev, "%s - parity = odd\n", __func__); |
| } else { |
| lParity = LCR_PAR_EVEN; |
| dev_dbg(dev, "%s - parity = even\n", __func__); |
| } |
| } else { |
| dev_dbg(dev, "%s - parity = none\n", __func__); |
| } |
| |
| if (cflag & CSTOPB) { |
| lStop = LCR_STOP_2; |
| dev_dbg(dev, "%s - stop bits = 2\n", __func__); |
| } else { |
| lStop = LCR_STOP_1; |
| dev_dbg(dev, "%s - stop bits = 1\n", __func__); |
| } |
| |
| /* figure out the flow control settings */ |
| rxFlow = txFlow = 0x00; |
| if (cflag & CRTSCTS) { |
| rxFlow |= IOSP_RX_FLOW_RTS; |
| txFlow |= IOSP_TX_FLOW_CTS; |
| dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__); |
| } else { |
| dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__); |
| } |
| |
| /* if we are implementing XON/XOFF, set the start and stop character |
| in the device */ |
| if (I_IXOFF(tty) || I_IXON(tty)) { |
| unsigned char stop_char = STOP_CHAR(tty); |
| unsigned char start_char = START_CHAR(tty); |
| |
| if ((!edge_serial->is_epic) || |
| ((edge_serial->is_epic) && |
| (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) { |
| send_iosp_ext_cmd(edge_port, |
| IOSP_CMD_SET_XON_CHAR, start_char); |
| send_iosp_ext_cmd(edge_port, |
| IOSP_CMD_SET_XOFF_CHAR, stop_char); |
| } |
| |
| /* if we are implementing INBOUND XON/XOFF */ |
| if (I_IXOFF(tty)) { |
| rxFlow |= IOSP_RX_FLOW_XON_XOFF; |
| dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", |
| __func__, start_char, stop_char); |
| } else { |
| dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__); |
| } |
| |
| /* if we are implementing OUTBOUND XON/XOFF */ |
| if (I_IXON(tty)) { |
| txFlow |= IOSP_TX_FLOW_XON_XOFF; |
| dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", |
| __func__, start_char, stop_char); |
| } else { |
| dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__); |
| } |
| } |
| |
| /* Set flow control to the configured value */ |
| if ((!edge_serial->is_epic) || |
| ((edge_serial->is_epic) && |
| (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow))) |
| send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow); |
| if ((!edge_serial->is_epic) || |
| ((edge_serial->is_epic) && |
| (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow))) |
| send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow); |
| |
| |
| edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); |
| edge_port->shadowLCR |= (lData | lParity | lStop); |
| |
| edge_port->validDataMask = mask; |
| |
| /* Send the updated LCR value to the EdgePort */ |
| status = send_cmd_write_uart_register(edge_port, LCR, |
| edge_port->shadowLCR); |
| if (status != 0) |
| return; |
| |
| /* set up the MCR register and send it to the EdgePort */ |
| edge_port->shadowMCR = MCR_MASTER_IE; |
| if (cflag & CBAUD) |
| edge_port->shadowMCR |= (MCR_DTR | MCR_RTS); |
| |
| status = send_cmd_write_uart_register(edge_port, MCR, |
| edge_port->shadowMCR); |
| if (status != 0) |
| return; |
| |
| /* Determine divisor based on baud rate */ |
| baud = tty_get_baud_rate(tty); |
| if (!baud) { |
| /* pick a default, any default... */ |
| baud = 9600; |
| } |
| |
| dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud); |
| status = send_cmd_write_baud_rate(edge_port, baud); |
| if (status == -1) { |
| /* Speed change was not possible - put back the old speed */ |
| baud = tty_termios_baud_rate(old_termios); |
| tty_encode_baud_rate(tty, baud, baud); |
| } |
| } |
| |
| |
| /**************************************************************************** |
| * unicode_to_ascii |
| * Turns a string from Unicode into ASCII. |
| * Doesn't do a good job with any characters that are outside the normal |
| * ASCII range, but it's only for debugging... |
| * NOTE: expects the unicode in LE format |
| ****************************************************************************/ |
| static void unicode_to_ascii(char *string, int buflen, |
| __le16 *unicode, int unicode_size) |
| { |
| int i; |
| |
| if (buflen <= 0) /* never happens, but... */ |
| return; |
| --buflen; /* space for nul */ |
| |
| for (i = 0; i < unicode_size; i++) { |
| if (i >= buflen) |
| break; |
| string[i] = (char)(le16_to_cpu(unicode[i])); |
| } |
| string[i] = 0x00; |
| } |
| |
| |
| /**************************************************************************** |
| * get_manufacturing_desc |
| * reads in the manufacturing descriptor and stores it into the serial |
| * structure. |
| ****************************************************************************/ |
| static void get_manufacturing_desc(struct edgeport_serial *edge_serial) |
| { |
| struct device *dev = &edge_serial->serial->dev->dev; |
| int response; |
| |
| dev_dbg(dev, "getting manufacturer descriptor\n"); |
| |
| response = rom_read(edge_serial->serial, |
| (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16, |
| (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), |
| EDGE_MANUF_DESC_LEN, |
| (__u8 *)(&edge_serial->manuf_descriptor)); |
| |
| if (response < 1) |
| dev_err(dev, "error in getting manufacturer descriptor\n"); |
| else { |
| char string[30]; |
| dev_dbg(dev, "**Manufacturer Descriptor\n"); |
| dev_dbg(dev, " RomSize: %dK\n", |
| edge_serial->manuf_descriptor.RomSize); |
| dev_dbg(dev, " RamSize: %dK\n", |
| edge_serial->manuf_descriptor.RamSize); |
| dev_dbg(dev, " CpuRev: %d\n", |
| edge_serial->manuf_descriptor.CpuRev); |
| dev_dbg(dev, " BoardRev: %d\n", |
| edge_serial->manuf_descriptor.BoardRev); |
| dev_dbg(dev, " NumPorts: %d\n", |
| edge_serial->manuf_descriptor.NumPorts); |
| dev_dbg(dev, " DescDate: %d/%d/%d\n", |
| edge_serial->manuf_descriptor.DescDate[0], |
| edge_serial->manuf_descriptor.DescDate[1], |
| edge_serial->manuf_descriptor.DescDate[2]+1900); |
| unicode_to_ascii(string, sizeof(string), |
| edge_serial->manuf_descriptor.SerialNumber, |
| edge_serial->manuf_descriptor.SerNumLength/2); |
| dev_dbg(dev, " SerialNumber: %s\n", string); |
| unicode_to_ascii(string, sizeof(string), |
| edge_serial->manuf_descriptor.AssemblyNumber, |
| edge_serial->manuf_descriptor.AssemblyNumLength/2); |
| dev_dbg(dev, " AssemblyNumber: %s\n", string); |
| unicode_to_ascii(string, sizeof(string), |
| edge_serial->manuf_descriptor.OemAssyNumber, |
| edge_serial->manuf_descriptor.OemAssyNumLength/2); |
| dev_dbg(dev, " OemAssyNumber: %s\n", string); |
| dev_dbg(dev, " UartType: %d\n", |
| edge_serial->manuf_descriptor.UartType); |
| dev_dbg(dev, " IonPid: %d\n", |
| edge_serial->manuf_descriptor.IonPid); |
| dev_dbg(dev, " IonConfig: %d\n", |
| edge_serial->manuf_descriptor.IonConfig); |
| } |
| } |
| |
| |
| /**************************************************************************** |
| * get_boot_desc |
| * reads in the bootloader descriptor and stores it into the serial |
| * structure. |
| ****************************************************************************/ |
| static void get_boot_desc(struct edgeport_serial *edge_serial) |
| { |
| struct device *dev = &edge_serial->serial->dev->dev; |
| int response; |
| |
| dev_dbg(dev, "getting boot descriptor\n"); |
| |
| response = rom_read(edge_serial->serial, |
| (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16, |
| (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), |
| EDGE_BOOT_DESC_LEN, |
| (__u8 *)(&edge_serial->boot_descriptor)); |
| |
| if (response < 1) |
| dev_err(dev, "error in getting boot descriptor\n"); |
| else { |
| dev_dbg(dev, "**Boot Descriptor:\n"); |
| dev_dbg(dev, " BootCodeLength: %d\n", |
| le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength)); |
| dev_dbg(dev, " MajorVersion: %d\n", |
| edge_serial->boot_descriptor.MajorVersion); |
| dev_dbg(dev, " MinorVersion: %d\n", |
| edge_serial->boot_descriptor.MinorVersion); |
| dev_dbg(dev, " BuildNumber: %d\n", |
| le16_to_cpu(edge_serial->boot_descriptor.BuildNumber)); |
| dev_dbg(dev, " Capabilities: 0x%x\n", |
| le16_to_cpu(edge_serial->boot_descriptor.Capabilities)); |
| dev_dbg(dev, " UConfig0: %d\n", |
| edge_serial->boot_descriptor.UConfig0); |
| dev_dbg(dev, " UConfig1: %d\n", |
| edge_serial->boot_descriptor.UConfig1); |
| } |
| } |
| |
| |
| /**************************************************************************** |
| * load_application_firmware |
| * This is called to load the application firmware to the device |
| ****************************************************************************/ |
| static void load_application_firmware(struct edgeport_serial *edge_serial) |
| { |
| struct device *dev = &edge_serial->serial->dev->dev; |
| const struct ihex_binrec *rec; |
| const struct firmware *fw; |
| const char *fw_name; |
| const char *fw_info; |
| int response; |
| __u32 Operaddr; |
| __u16 build; |
| |
| switch (edge_serial->product_info.iDownloadFile) { |
| case EDGE_DOWNLOAD_FILE_I930: |
| fw_info = "downloading firmware version (930)"; |
| fw_name = "edgeport/down.fw"; |
| break; |
| |
| case EDGE_DOWNLOAD_FILE_80251: |
| fw_info = "downloading firmware version (80251)"; |
| fw_name = "edgeport/down2.fw"; |
| break; |
| |
| case EDGE_DOWNLOAD_FILE_NONE: |
| dev_dbg(dev, "No download file specified, skipping download\n"); |
| return; |
| |
| default: |
| return; |
| } |
| |
| response = request_ihex_firmware(&fw, fw_name, |
| &edge_serial->serial->dev->dev); |
| if (response) { |
| dev_err(dev, "Failed to load image \"%s\" err %d\n", |
| fw_name, response); |
| return; |
| } |
| |
| rec = (const struct ihex_binrec *)fw->data; |
| build = (rec->data[2] << 8) | rec->data[3]; |
| |
| dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build); |
| |
| edge_serial->product_info.FirmwareMajorVersion = rec->data[0]; |
| edge_serial->product_info.FirmwareMinorVersion = rec->data[1]; |
| edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build); |
| |
| for (rec = ihex_next_binrec(rec); rec; |
| rec = ihex_next_binrec(rec)) { |
| Operaddr = be32_to_cpu(rec->addr); |
| response = sram_write(edge_serial->serial, |
| Operaddr >> 16, |
| Operaddr & 0xFFFF, |
| be16_to_cpu(rec->len), |
| &rec->data[0]); |
| if (response < 0) { |
| dev_err(&edge_serial->serial->dev->dev, |
| "sram_write failed (%x, %x, %d)\n", |
| Operaddr >> 16, Operaddr & 0xFFFF, |
| be16_to_cpu(rec->len)); |
| break; |
| } |
| } |
| |
| dev_dbg(dev, "sending exec_dl_code\n"); |
| response = usb_control_msg (edge_serial->serial->dev, |
| usb_sndctrlpipe(edge_serial->serial->dev, 0), |
| USB_REQUEST_ION_EXEC_DL_CODE, |
| 0x40, 0x4000, 0x0001, NULL, 0, 3000); |
| |
| release_firmware(fw); |
| } |
| |
| |
| /**************************************************************************** |
| * edge_startup |
| ****************************************************************************/ |
| static int edge_startup(struct usb_serial *serial) |
| { |
| struct edgeport_serial *edge_serial; |
| struct usb_device *dev; |
| struct device *ddev = &serial->dev->dev; |
| int i; |
| int response; |
| bool interrupt_in_found; |
| bool bulk_in_found; |
| bool bulk_out_found; |
| static __u32 descriptor[3] = { EDGE_COMPATIBILITY_MASK0, |
| EDGE_COMPATIBILITY_MASK1, |
| EDGE_COMPATIBILITY_MASK2 }; |
| |
| dev = serial->dev; |
| |
| /* create our private serial structure */ |
| edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); |
| if (edge_serial == NULL) { |
| dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); |
| return -ENOMEM; |
| } |
| spin_lock_init(&edge_serial->es_lock); |
| edge_serial->serial = serial; |
| usb_set_serial_data(serial, edge_serial); |
| |
| /* get the name for the device from the device */ |
| i = usb_string(dev, dev->descriptor.iManufacturer, |
| &edge_serial->name[0], MAX_NAME_LEN+1); |
| if (i < 0) |
| i = 0; |
| edge_serial->name[i++] = ' '; |
| usb_string(dev, dev->descriptor.iProduct, |
| &edge_serial->name[i], MAX_NAME_LEN+2 - i); |
| |
| dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); |
| |
| /* Read the epic descriptor */ |
| if (get_epic_descriptor(edge_serial) <= 0) { |
| /* memcpy descriptor to Supports structures */ |
| memcpy(&edge_serial->epic_descriptor.Supports, descriptor, |
| sizeof(struct edge_compatibility_bits)); |
| |
| /* get the manufacturing descriptor for this device */ |
| get_manufacturing_desc(edge_serial); |
| |
| /* get the boot descriptor */ |
| get_boot_desc(edge_serial); |
| |
| get_product_info(edge_serial); |
| } |
| |
| /* set the number of ports from the manufacturing description */ |
| /* serial->num_ports = serial->product_info.NumPorts; */ |
| if ((!edge_serial->is_epic) && |
| (edge_serial->product_info.NumPorts != serial->num_ports)) { |
| dev_warn(ddev, |
| "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n", |
| edge_serial->product_info.NumPorts, |
| serial->num_ports); |
| } |
| |
| dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies); |
| |
| /* If not an EPiC device */ |
| if (!edge_serial->is_epic) { |
| /* now load the application firmware into this device */ |
| load_application_firmware(edge_serial); |
| |
| dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies); |
| |
| /* Check current Edgeport EEPROM and update if necessary */ |
| update_edgeport_E2PROM(edge_serial); |
| |
| dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies); |
| |
| /* set the configuration to use #1 */ |
| /* dev_dbg(ddev, "set_configuration 1\n"); */ |
| /* usb_set_configuration (dev, 1); */ |
| } |
| dev_dbg(ddev, " FirmwareMajorVersion %d.%d.%d\n", |
| edge_serial->product_info.FirmwareMajorVersion, |
| edge_serial->product_info.FirmwareMinorVersion, |
| le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber)); |
| |
| /* we set up the pointers to the endpoints in the edge_open function, |
| * as the structures aren't created yet. */ |
| |
| response = 0; |
| |
| if (edge_serial->is_epic) { |
| /* EPIC thing, set up our interrupt polling now and our read |
| * urb, so that the device knows it really is connected. */ |
| interrupt_in_found = bulk_in_found = bulk_out_found = false; |
| for (i = 0; i < serial->interface->altsetting[0] |
| .desc.bNumEndpoints; ++i) { |
| struct usb_endpoint_descriptor *endpoint; |
| int buffer_size; |
| |
| endpoint = &serial->interface->altsetting[0]. |
| endpoint[i].desc; |
| buffer_size = usb_endpoint_maxp(endpoint); |
| if (!interrupt_in_found && |
| (usb_endpoint_is_int_in(endpoint))) { |
| /* we found a interrupt in endpoint */ |
| dev_dbg(ddev, "found interrupt in\n"); |
| |
| /* not set up yet, so do it now */ |
| edge_serial->interrupt_read_urb = |
| usb_alloc_urb(0, GFP_KERNEL); |
| if (!edge_serial->interrupt_read_urb) { |
| dev_err(ddev, "out of memory\n"); |
| return -ENOMEM; |
| } |
| edge_serial->interrupt_in_buffer = |
| kmalloc(buffer_size, GFP_KERNEL); |
| if (!edge_serial->interrupt_in_buffer) { |
| dev_err(ddev, "out of memory\n"); |
| usb_free_urb(edge_serial->interrupt_read_urb); |
| return -ENOMEM; |
| } |
| edge_serial->interrupt_in_endpoint = |
| endpoint->bEndpointAddress; |
| |
| /* set up our interrupt urb */ |
| usb_fill_int_urb( |
| edge_serial->interrupt_read_urb, |
| dev, |
| usb_rcvintpipe(dev, |
| endpoint->bEndpointAddress), |
| edge_serial->interrupt_in_buffer, |
| buffer_size, |
| edge_interrupt_callback, |
| edge_serial, |
| endpoint->bInterval); |
| |
| interrupt_in_found = true; |
| } |
| |
| if (!bulk_in_found && |
| (usb_endpoint_is_bulk_in(endpoint))) { |
| /* we found a bulk in endpoint */ |
| dev_dbg(ddev, "found bulk in\n"); |
| |
| /* not set up yet, so do it now */ |
| edge_serial->read_urb = |
| usb_alloc_urb(0, GFP_KERNEL); |
| if (!edge_serial->read_urb) { |
| dev_err(ddev, "out of memory\n"); |
| return -ENOMEM; |
| } |
| edge_serial->bulk_in_buffer = |
| kmalloc(buffer_size, GFP_KERNEL); |
| if (!edge_serial->bulk_in_buffer) { |
| dev_err(&dev->dev, "out of memory\n"); |
| usb_free_urb(edge_serial->read_urb); |
| return -ENOMEM; |
| } |
| edge_serial->bulk_in_endpoint = |
| endpoint->bEndpointAddress; |
| |
| /* set up our bulk in urb */ |
| usb_fill_bulk_urb(edge_serial->read_urb, dev, |
| usb_rcvbulkpipe(dev, |
| endpoint->bEndpointAddress), |
| edge_serial->bulk_in_buffer, |
| usb_endpoint_maxp(endpoint), |
| edge_bulk_in_callback, |
| edge_serial); |
| bulk_in_found = true; |
| } |
| |
| if (!bulk_out_found && |
| (usb_endpoint_is_bulk_out(endpoint))) { |
| /* we found a bulk out endpoint */ |
| dev_dbg(ddev, "found bulk out\n"); |
| edge_serial->bulk_out_endpoint = |
| endpoint->bEndpointAddress; |
| bulk_out_found = true; |
| } |
| } |
| |
| if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) { |
| dev_err(ddev, "Error - the proper endpoints were not found!\n"); |
| return -ENODEV; |
| } |
| |
| /* start interrupt read for this edgeport this interrupt will |
| * continue as long as the edgeport is connected */ |
| response = usb_submit_urb(edge_serial->interrupt_read_urb, |
| GFP_KERNEL); |
| if (response) |
| dev_err(ddev, "%s - Error %d submitting control urb\n", |
| __func__, response); |
| } |
| return response; |
| } |
| |
| |
| /**************************************************************************** |
| * edge_disconnect |
| * This function is called whenever the device is removed from the usb bus. |
| ****************************************************************************/ |
| static void edge_disconnect(struct usb_serial *serial) |
| { |
| struct edgeport_serial *edge_serial = usb_get_serial_data(serial); |
| |
| /* stop reads and writes on all ports */ |
| /* free up our endpoint stuff */ |
| if (edge_serial->is_epic) { |
| usb_kill_urb(edge_serial->interrupt_read_urb); |
| usb_free_urb(edge_serial->interrupt_read_urb); |
| kfree(edge_serial->interrupt_in_buffer); |
| |
| usb_kill_urb(edge_serial->read_urb); |
| usb_free_urb(edge_serial->read_urb); |
| kfree(edge_serial->bulk_in_buffer); |
| } |
| } |
| |
| |
| /**************************************************************************** |
| * edge_release |
| * This function is called when the device structure is deallocated. |
| ****************************************************************************/ |
| static void edge_release(struct usb_serial *serial) |
| { |
| struct edgeport_serial *edge_serial = usb_get_serial_data(serial); |
| |
| kfree(edge_serial); |
| } |
| |
| static int edge_port_probe(struct usb_serial_port *port) |
| { |
| struct edgeport_port *edge_port; |
| |
| edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL); |
| if (!edge_port) |
| return -ENOMEM; |
| |
| spin_lock_init(&edge_port->ep_lock); |
| edge_port->port = port; |
| |
| usb_set_serial_port_data(port, edge_port); |
| |
| return 0; |
| } |
| |
| static int edge_port_remove(struct usb_serial_port *port) |
| { |
| struct edgeport_port *edge_port; |
| |
| edge_port = usb_get_serial_port_data(port); |
| kfree(edge_port); |
| |
| return 0; |
| } |
| |
| module_usb_serial_driver(serial_drivers, id_table_combined); |
| |
| MODULE_AUTHOR(DRIVER_AUTHOR); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| MODULE_FIRMWARE("edgeport/boot.fw"); |
| MODULE_FIRMWARE("edgeport/boot2.fw"); |
| MODULE_FIRMWARE("edgeport/down.fw"); |
| MODULE_FIRMWARE("edgeport/down2.fw"); |