| /* |
| * USB ConnectTech WhiteHEAT driver |
| * |
| * Copyright (C) 2002 |
| * Connect Tech Inc. |
| * |
| * Copyright (C) 1999 - 2001 |
| * 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. |
| * |
| * See Documentation/usb/usb-serial.txt for more information on using this |
| * driver |
| */ |
| |
| #include <linux/kernel.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/mutex.h> |
| #include <linux/uaccess.h> |
| #include <asm/termbits.h> |
| #include <linux/usb.h> |
| #include <linux/serial_reg.h> |
| #include <linux/serial.h> |
| #include <linux/usb/serial.h> |
| #include <linux/firmware.h> |
| #include <linux/ihex.h> |
| #include "whiteheat.h" /* WhiteHEAT specific commands */ |
| |
| static int debug; |
| |
| #ifndef CMSPAR |
| #define CMSPAR 0 |
| #endif |
| |
| /* |
| * Version Information |
| */ |
| #define DRIVER_VERSION "v2.0" |
| #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>" |
| #define DRIVER_DESC "USB ConnectTech WhiteHEAT driver" |
| |
| #define CONNECT_TECH_VENDOR_ID 0x0710 |
| #define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001 |
| #define CONNECT_TECH_WHITE_HEAT_ID 0x8001 |
| |
| /* |
| ID tables for whiteheat are unusual, because we want to different |
| things for different versions of the device. Eventually, this |
| will be doable from a single table. But, for now, we define two |
| separate ID tables, and then a third table that combines them |
| just for the purpose of exporting the autoloading information. |
| */ |
| static const struct usb_device_id id_table_std[] = { |
| { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) }, |
| { } /* Terminating entry */ |
| }; |
| |
| static const struct usb_device_id id_table_prerenumeration[] = { |
| { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) }, |
| { } /* Terminating entry */ |
| }; |
| |
| static const struct usb_device_id id_table_combined[] = { |
| { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) }, |
| { USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) }, |
| { } /* Terminating entry */ |
| }; |
| |
| MODULE_DEVICE_TABLE(usb, id_table_combined); |
| |
| static struct usb_driver whiteheat_driver = { |
| .name = "whiteheat", |
| .probe = usb_serial_probe, |
| .disconnect = usb_serial_disconnect, |
| .id_table = id_table_combined, |
| .no_dynamic_id = 1, |
| }; |
| |
| /* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */ |
| static int whiteheat_firmware_download(struct usb_serial *serial, |
| const struct usb_device_id *id); |
| static int whiteheat_firmware_attach(struct usb_serial *serial); |
| |
| /* function prototypes for the Connect Tech WhiteHEAT serial converter */ |
| static int whiteheat_attach(struct usb_serial *serial); |
| static void whiteheat_release(struct usb_serial *serial); |
| static int whiteheat_open(struct tty_struct *tty, |
| struct usb_serial_port *port); |
| static void whiteheat_close(struct usb_serial_port *port); |
| static int whiteheat_write(struct tty_struct *tty, |
| struct usb_serial_port *port, |
| const unsigned char *buf, int count); |
| static int whiteheat_write_room(struct tty_struct *tty); |
| static int whiteheat_ioctl(struct tty_struct *tty, |
| unsigned int cmd, unsigned long arg); |
| static void whiteheat_set_termios(struct tty_struct *tty, |
| struct usb_serial_port *port, struct ktermios *old); |
| static int whiteheat_tiocmget(struct tty_struct *tty); |
| static int whiteheat_tiocmset(struct tty_struct *tty, |
| unsigned int set, unsigned int clear); |
| static void whiteheat_break_ctl(struct tty_struct *tty, int break_state); |
| static int whiteheat_chars_in_buffer(struct tty_struct *tty); |
| static void whiteheat_throttle(struct tty_struct *tty); |
| static void whiteheat_unthrottle(struct tty_struct *tty); |
| static void whiteheat_read_callback(struct urb *urb); |
| static void whiteheat_write_callback(struct urb *urb); |
| |
| static struct usb_serial_driver whiteheat_fake_device = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "whiteheatnofirm", |
| }, |
| .description = "Connect Tech - WhiteHEAT - (prerenumeration)", |
| .usb_driver = &whiteheat_driver, |
| .id_table = id_table_prerenumeration, |
| .num_ports = 1, |
| .probe = whiteheat_firmware_download, |
| .attach = whiteheat_firmware_attach, |
| }; |
| |
| static struct usb_serial_driver whiteheat_device = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "whiteheat", |
| }, |
| .description = "Connect Tech - WhiteHEAT", |
| .usb_driver = &whiteheat_driver, |
| .id_table = id_table_std, |
| .num_ports = 4, |
| .attach = whiteheat_attach, |
| .release = whiteheat_release, |
| .open = whiteheat_open, |
| .close = whiteheat_close, |
| .write = whiteheat_write, |
| .write_room = whiteheat_write_room, |
| .ioctl = whiteheat_ioctl, |
| .set_termios = whiteheat_set_termios, |
| .break_ctl = whiteheat_break_ctl, |
| .tiocmget = whiteheat_tiocmget, |
| .tiocmset = whiteheat_tiocmset, |
| .chars_in_buffer = whiteheat_chars_in_buffer, |
| .throttle = whiteheat_throttle, |
| .unthrottle = whiteheat_unthrottle, |
| .read_bulk_callback = whiteheat_read_callback, |
| .write_bulk_callback = whiteheat_write_callback, |
| }; |
| |
| |
| struct whiteheat_command_private { |
| struct mutex mutex; |
| __u8 port_running; |
| __u8 command_finished; |
| wait_queue_head_t wait_command; /* for handling sleeping whilst |
| waiting for a command to |
| finish */ |
| __u8 result_buffer[64]; |
| }; |
| |
| |
| #define THROTTLED 0x01 |
| #define ACTUALLY_THROTTLED 0x02 |
| |
| static int urb_pool_size = 8; |
| |
| struct whiteheat_urb_wrap { |
| struct list_head list; |
| struct urb *urb; |
| }; |
| |
| struct whiteheat_private { |
| spinlock_t lock; |
| __u8 flags; |
| __u8 mcr; /* FIXME: no locking on mcr */ |
| struct list_head rx_urbs_free; |
| struct list_head rx_urbs_submitted; |
| struct list_head rx_urb_q; |
| struct work_struct rx_work; |
| struct usb_serial_port *port; |
| struct list_head tx_urbs_free; |
| struct list_head tx_urbs_submitted; |
| struct mutex deathwarrant; |
| }; |
| |
| |
| /* local function prototypes */ |
| static int start_command_port(struct usb_serial *serial); |
| static void stop_command_port(struct usb_serial *serial); |
| static void command_port_write_callback(struct urb *urb); |
| static void command_port_read_callback(struct urb *urb); |
| |
| static int start_port_read(struct usb_serial_port *port); |
| static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, |
| struct list_head *head); |
| static struct list_head *list_first(struct list_head *head); |
| static void rx_data_softint(struct work_struct *work); |
| |
| static int firm_send_command(struct usb_serial_port *port, __u8 command, |
| __u8 *data, __u8 datasize); |
| static int firm_open(struct usb_serial_port *port); |
| static int firm_close(struct usb_serial_port *port); |
| static void firm_setup_port(struct tty_struct *tty); |
| static int firm_set_rts(struct usb_serial_port *port, __u8 onoff); |
| static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff); |
| static int firm_set_break(struct usb_serial_port *port, __u8 onoff); |
| static int firm_purge(struct usb_serial_port *port, __u8 rxtx); |
| static int firm_get_dtr_rts(struct usb_serial_port *port); |
| static int firm_report_tx_done(struct usb_serial_port *port); |
| |
| |
| #define COMMAND_PORT 4 |
| #define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */ |
| #define COMMAND_TIMEOUT_MS 2000 |
| #define CLOSING_DELAY (30 * HZ) |
| |
| |
| /***************************************************************************** |
| * Connect Tech's White Heat prerenumeration driver functions |
| *****************************************************************************/ |
| |
| /* steps to download the firmware to the WhiteHEAT device: |
| - hold the reset (by writing to the reset bit of the CPUCS register) |
| - download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD |
| - release the reset (by writing to the CPUCS register) |
| - download the WH.HEX file for all addresses greater than 0x1b3f using |
| VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD |
| - hold the reset |
| - download the WH.HEX file for all addresses less than 0x1b40 using |
| VENDOR_REQUEST_ANCHOR_LOAD |
| - release the reset |
| - device renumerated itself and comes up as new device id with all |
| firmware download completed. |
| */ |
| static int whiteheat_firmware_download(struct usb_serial *serial, |
| const struct usb_device_id *id) |
| { |
| int response, ret = -ENOENT; |
| const struct firmware *loader_fw = NULL, *firmware_fw = NULL; |
| const struct ihex_binrec *record; |
| |
| dbg("%s", __func__); |
| |
| if (request_ihex_firmware(&firmware_fw, "whiteheat.fw", |
| &serial->dev->dev)) { |
| dev_err(&serial->dev->dev, |
| "%s - request \"whiteheat.fw\" failed\n", __func__); |
| goto out; |
| } |
| if (request_ihex_firmware(&loader_fw, "whiteheat_loader.fw", |
| &serial->dev->dev)) { |
| dev_err(&serial->dev->dev, |
| "%s - request \"whiteheat_loader.fw\" failed\n", |
| __func__); |
| goto out; |
| } |
| ret = 0; |
| response = ezusb_set_reset (serial, 1); |
| |
| record = (const struct ihex_binrec *)loader_fw->data; |
| while (record) { |
| response = ezusb_writememory (serial, be32_to_cpu(record->addr), |
| (unsigned char *)record->data, |
| be16_to_cpu(record->len), 0xa0); |
| if (response < 0) { |
| dev_err(&serial->dev->dev, "%s - ezusb_writememory " |
| "failed for loader (%d %04X %p %d)\n", |
| __func__, response, be32_to_cpu(record->addr), |
| record->data, be16_to_cpu(record->len)); |
| break; |
| } |
| record = ihex_next_binrec(record); |
| } |
| |
| response = ezusb_set_reset(serial, 0); |
| |
| record = (const struct ihex_binrec *)firmware_fw->data; |
| while (record && be32_to_cpu(record->addr) < 0x1b40) |
| record = ihex_next_binrec(record); |
| while (record) { |
| response = ezusb_writememory (serial, be32_to_cpu(record->addr), |
| (unsigned char *)record->data, |
| be16_to_cpu(record->len), 0xa3); |
| if (response < 0) { |
| dev_err(&serial->dev->dev, "%s - ezusb_writememory " |
| "failed for first firmware step " |
| "(%d %04X %p %d)\n", __func__, response, |
| be32_to_cpu(record->addr), record->data, |
| be16_to_cpu(record->len)); |
| break; |
| } |
| ++record; |
| } |
| |
| response = ezusb_set_reset(serial, 1); |
| |
| record = (const struct ihex_binrec *)firmware_fw->data; |
| while (record && be32_to_cpu(record->addr) < 0x1b40) { |
| response = ezusb_writememory (serial, be32_to_cpu(record->addr), |
| (unsigned char *)record->data, |
| be16_to_cpu(record->len), 0xa0); |
| if (response < 0) { |
| dev_err(&serial->dev->dev, "%s - ezusb_writememory " |
| "failed for second firmware step " |
| "(%d %04X %p %d)\n", __func__, response, |
| be32_to_cpu(record->addr), record->data, |
| be16_to_cpu(record->len)); |
| break; |
| } |
| ++record; |
| } |
| ret = 0; |
| response = ezusb_set_reset (serial, 0); |
| out: |
| release_firmware(loader_fw); |
| release_firmware(firmware_fw); |
| return ret; |
| } |
| |
| |
| static int whiteheat_firmware_attach(struct usb_serial *serial) |
| { |
| /* We want this device to fail to have a driver assigned to it */ |
| return 1; |
| } |
| |
| |
| /***************************************************************************** |
| * Connect Tech's White Heat serial driver functions |
| *****************************************************************************/ |
| static int whiteheat_attach(struct usb_serial *serial) |
| { |
| struct usb_serial_port *command_port; |
| struct whiteheat_command_private *command_info; |
| struct usb_serial_port *port; |
| struct whiteheat_private *info; |
| struct whiteheat_hw_info *hw_info; |
| int pipe; |
| int ret; |
| int alen; |
| __u8 *command; |
| __u8 *result; |
| int i; |
| int j; |
| struct urb *urb; |
| int buf_size; |
| struct whiteheat_urb_wrap *wrap; |
| struct list_head *tmp; |
| |
| command_port = serial->port[COMMAND_PORT]; |
| |
| pipe = usb_sndbulkpipe(serial->dev, |
| command_port->bulk_out_endpointAddress); |
| command = kmalloc(2, GFP_KERNEL); |
| if (!command) |
| goto no_command_buffer; |
| command[0] = WHITEHEAT_GET_HW_INFO; |
| command[1] = 0; |
| |
| result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL); |
| if (!result) |
| goto no_result_buffer; |
| /* |
| * When the module is reloaded the firmware is still there and |
| * the endpoints are still in the usb core unchanged. This is the |
| * unlinking bug in disguise. Same for the call below. |
| */ |
| usb_clear_halt(serial->dev, pipe); |
| ret = usb_bulk_msg(serial->dev, pipe, command, 2, |
| &alen, COMMAND_TIMEOUT_MS); |
| if (ret) { |
| dev_err(&serial->dev->dev, "%s: Couldn't send command [%d]\n", |
| serial->type->description, ret); |
| goto no_firmware; |
| } else if (alen != 2) { |
| dev_err(&serial->dev->dev, "%s: Send command incomplete [%d]\n", |
| serial->type->description, alen); |
| goto no_firmware; |
| } |
| |
| pipe = usb_rcvbulkpipe(serial->dev, |
| command_port->bulk_in_endpointAddress); |
| /* See the comment on the usb_clear_halt() above */ |
| usb_clear_halt(serial->dev, pipe); |
| ret = usb_bulk_msg(serial->dev, pipe, result, |
| sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS); |
| if (ret) { |
| dev_err(&serial->dev->dev, "%s: Couldn't get results [%d]\n", |
| serial->type->description, ret); |
| goto no_firmware; |
| } else if (alen != sizeof(*hw_info) + 1) { |
| dev_err(&serial->dev->dev, "%s: Get results incomplete [%d]\n", |
| serial->type->description, alen); |
| goto no_firmware; |
| } else if (result[0] != command[0]) { |
| dev_err(&serial->dev->dev, "%s: Command failed [%d]\n", |
| serial->type->description, result[0]); |
| goto no_firmware; |
| } |
| |
| hw_info = (struct whiteheat_hw_info *)&result[1]; |
| |
| dev_info(&serial->dev->dev, "%s: Driver %s: Firmware v%d.%02d\n", |
| serial->type->description, DRIVER_VERSION, |
| hw_info->sw_major_rev, hw_info->sw_minor_rev); |
| |
| for (i = 0; i < serial->num_ports; i++) { |
| port = serial->port[i]; |
| |
| info = kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL); |
| if (info == NULL) { |
| dev_err(&port->dev, |
| "%s: Out of memory for port structures\n", |
| serial->type->description); |
| goto no_private; |
| } |
| |
| spin_lock_init(&info->lock); |
| mutex_init(&info->deathwarrant); |
| info->flags = 0; |
| info->mcr = 0; |
| INIT_WORK(&info->rx_work, rx_data_softint); |
| info->port = port; |
| |
| INIT_LIST_HEAD(&info->rx_urbs_free); |
| INIT_LIST_HEAD(&info->rx_urbs_submitted); |
| INIT_LIST_HEAD(&info->rx_urb_q); |
| INIT_LIST_HEAD(&info->tx_urbs_free); |
| INIT_LIST_HEAD(&info->tx_urbs_submitted); |
| |
| for (j = 0; j < urb_pool_size; j++) { |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) { |
| dev_err(&port->dev, "No free urbs available\n"); |
| goto no_rx_urb; |
| } |
| buf_size = port->read_urb->transfer_buffer_length; |
| urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); |
| if (!urb->transfer_buffer) { |
| dev_err(&port->dev, |
| "Couldn't allocate urb buffer\n"); |
| goto no_rx_buf; |
| } |
| wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); |
| if (!wrap) { |
| dev_err(&port->dev, |
| "Couldn't allocate urb wrapper\n"); |
| goto no_rx_wrap; |
| } |
| usb_fill_bulk_urb(urb, serial->dev, |
| usb_rcvbulkpipe(serial->dev, |
| port->bulk_in_endpointAddress), |
| urb->transfer_buffer, buf_size, |
| whiteheat_read_callback, port); |
| wrap->urb = urb; |
| list_add(&wrap->list, &info->rx_urbs_free); |
| |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) { |
| dev_err(&port->dev, "No free urbs available\n"); |
| goto no_tx_urb; |
| } |
| buf_size = port->write_urb->transfer_buffer_length; |
| urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL); |
| if (!urb->transfer_buffer) { |
| dev_err(&port->dev, |
| "Couldn't allocate urb buffer\n"); |
| goto no_tx_buf; |
| } |
| wrap = kmalloc(sizeof(*wrap), GFP_KERNEL); |
| if (!wrap) { |
| dev_err(&port->dev, |
| "Couldn't allocate urb wrapper\n"); |
| goto no_tx_wrap; |
| } |
| usb_fill_bulk_urb(urb, serial->dev, |
| usb_sndbulkpipe(serial->dev, |
| port->bulk_out_endpointAddress), |
| urb->transfer_buffer, buf_size, |
| whiteheat_write_callback, port); |
| wrap->urb = urb; |
| list_add(&wrap->list, &info->tx_urbs_free); |
| } |
| |
| usb_set_serial_port_data(port, info); |
| } |
| |
| command_info = kmalloc(sizeof(struct whiteheat_command_private), |
| GFP_KERNEL); |
| if (command_info == NULL) { |
| dev_err(&serial->dev->dev, |
| "%s: Out of memory for port structures\n", |
| serial->type->description); |
| goto no_command_private; |
| } |
| |
| mutex_init(&command_info->mutex); |
| command_info->port_running = 0; |
| init_waitqueue_head(&command_info->wait_command); |
| usb_set_serial_port_data(command_port, command_info); |
| command_port->write_urb->complete = command_port_write_callback; |
| command_port->read_urb->complete = command_port_read_callback; |
| kfree(result); |
| kfree(command); |
| |
| return 0; |
| |
| no_firmware: |
| /* Firmware likely not running */ |
| dev_err(&serial->dev->dev, |
| "%s: Unable to retrieve firmware version, try replugging\n", |
| serial->type->description); |
| dev_err(&serial->dev->dev, |
| "%s: If the firmware is not running (status led not blinking)\n", |
| serial->type->description); |
| dev_err(&serial->dev->dev, |
| "%s: please contact support@connecttech.com\n", |
| serial->type->description); |
| kfree(result); |
| return -ENODEV; |
| |
| no_command_private: |
| for (i = serial->num_ports - 1; i >= 0; i--) { |
| port = serial->port[i]; |
| info = usb_get_serial_port_data(port); |
| for (j = urb_pool_size - 1; j >= 0; j--) { |
| tmp = list_first(&info->tx_urbs_free); |
| list_del(tmp); |
| wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); |
| urb = wrap->urb; |
| kfree(wrap); |
| no_tx_wrap: |
| kfree(urb->transfer_buffer); |
| no_tx_buf: |
| usb_free_urb(urb); |
| no_tx_urb: |
| tmp = list_first(&info->rx_urbs_free); |
| list_del(tmp); |
| wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); |
| urb = wrap->urb; |
| kfree(wrap); |
| no_rx_wrap: |
| kfree(urb->transfer_buffer); |
| no_rx_buf: |
| usb_free_urb(urb); |
| no_rx_urb: |
| ; |
| } |
| kfree(info); |
| no_private: |
| ; |
| } |
| kfree(result); |
| no_result_buffer: |
| kfree(command); |
| no_command_buffer: |
| return -ENOMEM; |
| } |
| |
| |
| static void whiteheat_release(struct usb_serial *serial) |
| { |
| struct usb_serial_port *command_port; |
| struct usb_serial_port *port; |
| struct whiteheat_private *info; |
| struct whiteheat_urb_wrap *wrap; |
| struct urb *urb; |
| struct list_head *tmp; |
| struct list_head *tmp2; |
| int i; |
| |
| dbg("%s", __func__); |
| |
| /* free up our private data for our command port */ |
| command_port = serial->port[COMMAND_PORT]; |
| kfree(usb_get_serial_port_data(command_port)); |
| |
| for (i = 0; i < serial->num_ports; i++) { |
| port = serial->port[i]; |
| info = usb_get_serial_port_data(port); |
| list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { |
| list_del(tmp); |
| wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); |
| urb = wrap->urb; |
| kfree(wrap); |
| kfree(urb->transfer_buffer); |
| usb_free_urb(urb); |
| } |
| list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) { |
| list_del(tmp); |
| wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); |
| urb = wrap->urb; |
| kfree(wrap); |
| kfree(urb->transfer_buffer); |
| usb_free_urb(urb); |
| } |
| kfree(info); |
| } |
| } |
| |
| static int whiteheat_open(struct tty_struct *tty, struct usb_serial_port *port) |
| { |
| int retval = 0; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| retval = start_command_port(port->serial); |
| if (retval) |
| goto exit; |
| |
| if (tty) |
| tty->low_latency = 1; |
| |
| /* send an open port command */ |
| retval = firm_open(port); |
| if (retval) { |
| stop_command_port(port->serial); |
| goto exit; |
| } |
| |
| retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX); |
| if (retval) { |
| firm_close(port); |
| stop_command_port(port->serial); |
| goto exit; |
| } |
| |
| if (tty) |
| firm_setup_port(tty); |
| |
| /* Work around HCD bugs */ |
| usb_clear_halt(port->serial->dev, port->read_urb->pipe); |
| usb_clear_halt(port->serial->dev, port->write_urb->pipe); |
| |
| /* Start reading from the device */ |
| retval = start_port_read(port); |
| if (retval) { |
| dev_err(&port->dev, |
| "%s - failed submitting read urb, error %d\n", |
| __func__, retval); |
| firm_close(port); |
| stop_command_port(port->serial); |
| goto exit; |
| } |
| |
| exit: |
| dbg("%s - exit, retval = %d", __func__, retval); |
| return retval; |
| } |
| |
| |
| static void whiteheat_close(struct usb_serial_port *port) |
| { |
| struct whiteheat_private *info = usb_get_serial_port_data(port); |
| struct whiteheat_urb_wrap *wrap; |
| struct urb *urb; |
| struct list_head *tmp; |
| struct list_head *tmp2; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| firm_report_tx_done(port); |
| firm_close(port); |
| |
| /* shutdown our bulk reads and writes */ |
| mutex_lock(&info->deathwarrant); |
| spin_lock_irq(&info->lock); |
| list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { |
| wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); |
| urb = wrap->urb; |
| list_del(tmp); |
| spin_unlock_irq(&info->lock); |
| usb_kill_urb(urb); |
| spin_lock_irq(&info->lock); |
| list_add(tmp, &info->rx_urbs_free); |
| } |
| list_for_each_safe(tmp, tmp2, &info->rx_urb_q) |
| list_move(tmp, &info->rx_urbs_free); |
| list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) { |
| wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); |
| urb = wrap->urb; |
| list_del(tmp); |
| spin_unlock_irq(&info->lock); |
| usb_kill_urb(urb); |
| spin_lock_irq(&info->lock); |
| list_add(tmp, &info->tx_urbs_free); |
| } |
| spin_unlock_irq(&info->lock); |
| mutex_unlock(&info->deathwarrant); |
| stop_command_port(port->serial); |
| } |
| |
| |
| static int whiteheat_write(struct tty_struct *tty, |
| struct usb_serial_port *port, const unsigned char *buf, int count) |
| { |
| struct usb_serial *serial = port->serial; |
| struct whiteheat_private *info = usb_get_serial_port_data(port); |
| struct whiteheat_urb_wrap *wrap; |
| struct urb *urb; |
| int result; |
| int bytes; |
| int sent = 0; |
| unsigned long flags; |
| struct list_head *tmp; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| if (count == 0) { |
| dbg("%s - write request of 0 bytes", __func__); |
| return (0); |
| } |
| |
| while (count) { |
| spin_lock_irqsave(&info->lock, flags); |
| if (list_empty(&info->tx_urbs_free)) { |
| spin_unlock_irqrestore(&info->lock, flags); |
| break; |
| } |
| tmp = list_first(&info->tx_urbs_free); |
| list_del(tmp); |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); |
| urb = wrap->urb; |
| bytes = (count > port->bulk_out_size) ? |
| port->bulk_out_size : count; |
| memcpy(urb->transfer_buffer, buf + sent, bytes); |
| |
| usb_serial_debug_data(debug, &port->dev, |
| __func__, bytes, urb->transfer_buffer); |
| |
| urb->dev = serial->dev; |
| urb->transfer_buffer_length = bytes; |
| result = usb_submit_urb(urb, GFP_ATOMIC); |
| if (result) { |
| dev_err(&port->dev, |
| "%s - failed submitting write urb, error %d\n", |
| __func__, result); |
| sent = result; |
| spin_lock_irqsave(&info->lock, flags); |
| list_add(tmp, &info->tx_urbs_free); |
| spin_unlock_irqrestore(&info->lock, flags); |
| break; |
| } else { |
| sent += bytes; |
| count -= bytes; |
| spin_lock_irqsave(&info->lock, flags); |
| list_add(tmp, &info->tx_urbs_submitted); |
| spin_unlock_irqrestore(&info->lock, flags); |
| } |
| } |
| |
| return sent; |
| } |
| |
| static int whiteheat_write_room(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct whiteheat_private *info = usb_get_serial_port_data(port); |
| struct list_head *tmp; |
| int room = 0; |
| unsigned long flags; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| spin_lock_irqsave(&info->lock, flags); |
| list_for_each(tmp, &info->tx_urbs_free) |
| room++; |
| spin_unlock_irqrestore(&info->lock, flags); |
| room *= port->bulk_out_size; |
| |
| dbg("%s - returns %d", __func__, room); |
| return (room); |
| } |
| |
| static int whiteheat_tiocmget(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct whiteheat_private *info = usb_get_serial_port_data(port); |
| unsigned int modem_signals = 0; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| firm_get_dtr_rts(port); |
| if (info->mcr & UART_MCR_DTR) |
| modem_signals |= TIOCM_DTR; |
| if (info->mcr & UART_MCR_RTS) |
| modem_signals |= TIOCM_RTS; |
| |
| return modem_signals; |
| } |
| |
| static int whiteheat_tiocmset(struct tty_struct *tty, |
| unsigned int set, unsigned int clear) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct whiteheat_private *info = usb_get_serial_port_data(port); |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| if (set & TIOCM_RTS) |
| info->mcr |= UART_MCR_RTS; |
| if (set & TIOCM_DTR) |
| info->mcr |= UART_MCR_DTR; |
| |
| if (clear & TIOCM_RTS) |
| info->mcr &= ~UART_MCR_RTS; |
| if (clear & TIOCM_DTR) |
| info->mcr &= ~UART_MCR_DTR; |
| |
| firm_set_dtr(port, info->mcr & UART_MCR_DTR); |
| firm_set_rts(port, info->mcr & UART_MCR_RTS); |
| return 0; |
| } |
| |
| |
| static int whiteheat_ioctl(struct tty_struct *tty, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct serial_struct serstruct; |
| void __user *user_arg = (void __user *)arg; |
| |
| dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
| |
| switch (cmd) { |
| case TIOCGSERIAL: |
| memset(&serstruct, 0, sizeof(serstruct)); |
| serstruct.type = PORT_16654; |
| serstruct.line = port->serial->minor; |
| serstruct.port = port->number; |
| serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; |
| serstruct.xmit_fifo_size = port->bulk_out_size; |
| serstruct.custom_divisor = 0; |
| serstruct.baud_base = 460800; |
| serstruct.close_delay = CLOSING_DELAY; |
| serstruct.closing_wait = CLOSING_DELAY; |
| |
| if (copy_to_user(user_arg, &serstruct, sizeof(serstruct))) |
| return -EFAULT; |
| break; |
| default: |
| break; |
| } |
| |
| return -ENOIOCTLCMD; |
| } |
| |
| |
| static void whiteheat_set_termios(struct tty_struct *tty, |
| struct usb_serial_port *port, struct ktermios *old_termios) |
| { |
| firm_setup_port(tty); |
| } |
| |
| static void whiteheat_break_ctl(struct tty_struct *tty, int break_state) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| firm_set_break(port, break_state); |
| } |
| |
| |
| static int whiteheat_chars_in_buffer(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct whiteheat_private *info = usb_get_serial_port_data(port); |
| struct list_head *tmp; |
| struct whiteheat_urb_wrap *wrap; |
| int chars = 0; |
| unsigned long flags; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| spin_lock_irqsave(&info->lock, flags); |
| list_for_each(tmp, &info->tx_urbs_submitted) { |
| wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); |
| chars += wrap->urb->transfer_buffer_length; |
| } |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| dbg("%s - returns %d", __func__, chars); |
| return chars; |
| } |
| |
| |
| static void whiteheat_throttle(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct whiteheat_private *info = usb_get_serial_port_data(port); |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| spin_lock_irq(&info->lock); |
| info->flags |= THROTTLED; |
| spin_unlock_irq(&info->lock); |
| } |
| |
| |
| static void whiteheat_unthrottle(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct whiteheat_private *info = usb_get_serial_port_data(port); |
| int actually_throttled; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| spin_lock_irq(&info->lock); |
| actually_throttled = info->flags & ACTUALLY_THROTTLED; |
| info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED); |
| spin_unlock_irq(&info->lock); |
| |
| if (actually_throttled) |
| rx_data_softint(&info->rx_work); |
| } |
| |
| |
| /***************************************************************************** |
| * Connect Tech's White Heat callback routines |
| *****************************************************************************/ |
| static void command_port_write_callback(struct urb *urb) |
| { |
| int status = urb->status; |
| |
| dbg("%s", __func__); |
| |
| if (status) { |
| dbg("nonzero urb status: %d", status); |
| return; |
| } |
| } |
| |
| |
| static void command_port_read_callback(struct urb *urb) |
| { |
| struct usb_serial_port *command_port = urb->context; |
| struct whiteheat_command_private *command_info; |
| int status = urb->status; |
| unsigned char *data = urb->transfer_buffer; |
| int result; |
| |
| dbg("%s", __func__); |
| |
| command_info = usb_get_serial_port_data(command_port); |
| if (!command_info) { |
| dbg("%s - command_info is NULL, exiting.", __func__); |
| return; |
| } |
| if (status) { |
| dbg("%s - nonzero urb status: %d", __func__, status); |
| if (status != -ENOENT) |
| command_info->command_finished = WHITEHEAT_CMD_FAILURE; |
| wake_up(&command_info->wait_command); |
| return; |
| } |
| |
| usb_serial_debug_data(debug, &command_port->dev, |
| __func__, urb->actual_length, data); |
| |
| if (data[0] == WHITEHEAT_CMD_COMPLETE) { |
| command_info->command_finished = WHITEHEAT_CMD_COMPLETE; |
| wake_up(&command_info->wait_command); |
| } else if (data[0] == WHITEHEAT_CMD_FAILURE) { |
| command_info->command_finished = WHITEHEAT_CMD_FAILURE; |
| wake_up(&command_info->wait_command); |
| } else if (data[0] == WHITEHEAT_EVENT) { |
| /* These are unsolicited reports from the firmware, hence no |
| waiting command to wakeup */ |
| dbg("%s - event received", __func__); |
| } else if (data[0] == WHITEHEAT_GET_DTR_RTS) { |
| memcpy(command_info->result_buffer, &data[1], |
| urb->actual_length - 1); |
| command_info->command_finished = WHITEHEAT_CMD_COMPLETE; |
| wake_up(&command_info->wait_command); |
| } else |
| dbg("%s - bad reply from firmware", __func__); |
| |
| /* Continue trying to always read */ |
| command_port->read_urb->dev = command_port->serial->dev; |
| result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC); |
| if (result) |
| dbg("%s - failed resubmitting read urb, error %d", |
| __func__, result); |
| } |
| |
| |
| static void whiteheat_read_callback(struct urb *urb) |
| { |
| struct usb_serial_port *port = urb->context; |
| struct whiteheat_urb_wrap *wrap; |
| unsigned char *data = urb->transfer_buffer; |
| struct whiteheat_private *info = usb_get_serial_port_data(port); |
| int status = urb->status; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| spin_lock(&info->lock); |
| wrap = urb_to_wrap(urb, &info->rx_urbs_submitted); |
| if (!wrap) { |
| spin_unlock(&info->lock); |
| dev_err(&port->dev, "%s - Not my urb!\n", __func__); |
| return; |
| } |
| list_del(&wrap->list); |
| spin_unlock(&info->lock); |
| |
| if (status) { |
| dbg("%s - nonzero read bulk status received: %d", |
| __func__, status); |
| spin_lock(&info->lock); |
| list_add(&wrap->list, &info->rx_urbs_free); |
| spin_unlock(&info->lock); |
| return; |
| } |
| |
| usb_serial_debug_data(debug, &port->dev, |
| __func__, urb->actual_length, data); |
| |
| spin_lock(&info->lock); |
| list_add_tail(&wrap->list, &info->rx_urb_q); |
| if (info->flags & THROTTLED) { |
| info->flags |= ACTUALLY_THROTTLED; |
| spin_unlock(&info->lock); |
| return; |
| } |
| spin_unlock(&info->lock); |
| |
| schedule_work(&info->rx_work); |
| } |
| |
| |
| static void whiteheat_write_callback(struct urb *urb) |
| { |
| struct usb_serial_port *port = urb->context; |
| struct whiteheat_private *info = usb_get_serial_port_data(port); |
| struct whiteheat_urb_wrap *wrap; |
| int status = urb->status; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| spin_lock(&info->lock); |
| wrap = urb_to_wrap(urb, &info->tx_urbs_submitted); |
| if (!wrap) { |
| spin_unlock(&info->lock); |
| dev_err(&port->dev, "%s - Not my urb!\n", __func__); |
| return; |
| } |
| list_move(&wrap->list, &info->tx_urbs_free); |
| spin_unlock(&info->lock); |
| |
| if (status) { |
| dbg("%s - nonzero write bulk status received: %d", |
| __func__, status); |
| return; |
| } |
| |
| usb_serial_port_softint(port); |
| } |
| |
| |
| /***************************************************************************** |
| * Connect Tech's White Heat firmware interface |
| *****************************************************************************/ |
| static int firm_send_command(struct usb_serial_port *port, __u8 command, |
| __u8 *data, __u8 datasize) |
| { |
| struct usb_serial_port *command_port; |
| struct whiteheat_command_private *command_info; |
| struct whiteheat_private *info; |
| __u8 *transfer_buffer; |
| int retval = 0; |
| int t; |
| |
| dbg("%s - command %d", __func__, command); |
| |
| command_port = port->serial->port[COMMAND_PORT]; |
| command_info = usb_get_serial_port_data(command_port); |
| mutex_lock(&command_info->mutex); |
| command_info->command_finished = false; |
| |
| transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer; |
| transfer_buffer[0] = command; |
| memcpy(&transfer_buffer[1], data, datasize); |
| command_port->write_urb->transfer_buffer_length = datasize + 1; |
| command_port->write_urb->dev = port->serial->dev; |
| retval = usb_submit_urb(command_port->write_urb, GFP_NOIO); |
| if (retval) { |
| dbg("%s - submit urb failed", __func__); |
| goto exit; |
| } |
| |
| /* wait for the command to complete */ |
| t = wait_event_timeout(command_info->wait_command, |
| (bool)command_info->command_finished, COMMAND_TIMEOUT); |
| if (!t) |
| usb_kill_urb(command_port->write_urb); |
| |
| if (command_info->command_finished == false) { |
| dbg("%s - command timed out.", __func__); |
| retval = -ETIMEDOUT; |
| goto exit; |
| } |
| |
| if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) { |
| dbg("%s - command failed.", __func__); |
| retval = -EIO; |
| goto exit; |
| } |
| |
| if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) { |
| dbg("%s - command completed.", __func__); |
| switch (command) { |
| case WHITEHEAT_GET_DTR_RTS: |
| info = usb_get_serial_port_data(port); |
| memcpy(&info->mcr, command_info->result_buffer, |
| sizeof(struct whiteheat_dr_info)); |
| break; |
| } |
| } |
| exit: |
| mutex_unlock(&command_info->mutex); |
| return retval; |
| } |
| |
| |
| static int firm_open(struct usb_serial_port *port) |
| { |
| struct whiteheat_simple open_command; |
| |
| open_command.port = port->number - port->serial->minor + 1; |
| return firm_send_command(port, WHITEHEAT_OPEN, |
| (__u8 *)&open_command, sizeof(open_command)); |
| } |
| |
| |
| static int firm_close(struct usb_serial_port *port) |
| { |
| struct whiteheat_simple close_command; |
| |
| close_command.port = port->number - port->serial->minor + 1; |
| return firm_send_command(port, WHITEHEAT_CLOSE, |
| (__u8 *)&close_command, sizeof(close_command)); |
| } |
| |
| |
| static void firm_setup_port(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct whiteheat_port_settings port_settings; |
| unsigned int cflag = tty->termios->c_cflag; |
| |
| port_settings.port = port->number + 1; |
| |
| /* get the byte size */ |
| switch (cflag & CSIZE) { |
| case CS5: port_settings.bits = 5; break; |
| case CS6: port_settings.bits = 6; break; |
| case CS7: port_settings.bits = 7; break; |
| default: |
| case CS8: port_settings.bits = 8; break; |
| } |
| dbg("%s - data bits = %d", __func__, port_settings.bits); |
| |
| /* determine the parity */ |
| if (cflag & PARENB) |
| if (cflag & CMSPAR) |
| if (cflag & PARODD) |
| port_settings.parity = WHITEHEAT_PAR_MARK; |
| else |
| port_settings.parity = WHITEHEAT_PAR_SPACE; |
| else |
| if (cflag & PARODD) |
| port_settings.parity = WHITEHEAT_PAR_ODD; |
| else |
| port_settings.parity = WHITEHEAT_PAR_EVEN; |
| else |
| port_settings.parity = WHITEHEAT_PAR_NONE; |
| dbg("%s - parity = %c", __func__, port_settings.parity); |
| |
| /* figure out the stop bits requested */ |
| if (cflag & CSTOPB) |
| port_settings.stop = 2; |
| else |
| port_settings.stop = 1; |
| dbg("%s - stop bits = %d", __func__, port_settings.stop); |
| |
| /* figure out the flow control settings */ |
| if (cflag & CRTSCTS) |
| port_settings.hflow = (WHITEHEAT_HFLOW_CTS | |
| WHITEHEAT_HFLOW_RTS); |
| else |
| port_settings.hflow = WHITEHEAT_HFLOW_NONE; |
| dbg("%s - hardware flow control = %s %s %s %s", __func__, |
| (port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "", |
| (port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "", |
| (port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "", |
| (port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : ""); |
| |
| /* determine software flow control */ |
| if (I_IXOFF(tty)) |
| port_settings.sflow = WHITEHEAT_SFLOW_RXTX; |
| else |
| port_settings.sflow = WHITEHEAT_SFLOW_NONE; |
| dbg("%s - software flow control = %c", __func__, port_settings.sflow); |
| |
| port_settings.xon = START_CHAR(tty); |
| port_settings.xoff = STOP_CHAR(tty); |
| dbg("%s - XON = %2x, XOFF = %2x", |
| __func__, port_settings.xon, port_settings.xoff); |
| |
| /* get the baud rate wanted */ |
| port_settings.baud = tty_get_baud_rate(tty); |
| dbg("%s - baud rate = %d", __func__, port_settings.baud); |
| |
| /* fixme: should set validated settings */ |
| tty_encode_baud_rate(tty, port_settings.baud, port_settings.baud); |
| /* handle any settings that aren't specified in the tty structure */ |
| port_settings.lloop = 0; |
| |
| /* now send the message to the device */ |
| firm_send_command(port, WHITEHEAT_SETUP_PORT, |
| (__u8 *)&port_settings, sizeof(port_settings)); |
| } |
| |
| |
| static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) |
| { |
| struct whiteheat_set_rdb rts_command; |
| |
| rts_command.port = port->number - port->serial->minor + 1; |
| rts_command.state = onoff; |
| return firm_send_command(port, WHITEHEAT_SET_RTS, |
| (__u8 *)&rts_command, sizeof(rts_command)); |
| } |
| |
| |
| static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) |
| { |
| struct whiteheat_set_rdb dtr_command; |
| |
| dtr_command.port = port->number - port->serial->minor + 1; |
| dtr_command.state = onoff; |
| return firm_send_command(port, WHITEHEAT_SET_DTR, |
| (__u8 *)&dtr_command, sizeof(dtr_command)); |
| } |
| |
| |
| static int firm_set_break(struct usb_serial_port *port, __u8 onoff) |
| { |
| struct whiteheat_set_rdb break_command; |
| |
| break_command.port = port->number - port->serial->minor + 1; |
| break_command.state = onoff; |
| return firm_send_command(port, WHITEHEAT_SET_BREAK, |
| (__u8 *)&break_command, sizeof(break_command)); |
| } |
| |
| |
| static int firm_purge(struct usb_serial_port *port, __u8 rxtx) |
| { |
| struct whiteheat_purge purge_command; |
| |
| purge_command.port = port->number - port->serial->minor + 1; |
| purge_command.what = rxtx; |
| return firm_send_command(port, WHITEHEAT_PURGE, |
| (__u8 *)&purge_command, sizeof(purge_command)); |
| } |
| |
| |
| static int firm_get_dtr_rts(struct usb_serial_port *port) |
| { |
| struct whiteheat_simple get_dr_command; |
| |
| get_dr_command.port = port->number - port->serial->minor + 1; |
| return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, |
| (__u8 *)&get_dr_command, sizeof(get_dr_command)); |
| } |
| |
| |
| static int firm_report_tx_done(struct usb_serial_port *port) |
| { |
| struct whiteheat_simple close_command; |
| |
| close_command.port = port->number - port->serial->minor + 1; |
| return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, |
| (__u8 *)&close_command, sizeof(close_command)); |
| } |
| |
| |
| /***************************************************************************** |
| * Connect Tech's White Heat utility functions |
| *****************************************************************************/ |
| static int start_command_port(struct usb_serial *serial) |
| { |
| struct usb_serial_port *command_port; |
| struct whiteheat_command_private *command_info; |
| int retval = 0; |
| |
| command_port = serial->port[COMMAND_PORT]; |
| command_info = usb_get_serial_port_data(command_port); |
| mutex_lock(&command_info->mutex); |
| if (!command_info->port_running) { |
| /* Work around HCD bugs */ |
| usb_clear_halt(serial->dev, command_port->read_urb->pipe); |
| |
| command_port->read_urb->dev = serial->dev; |
| retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL); |
| if (retval) { |
| dev_err(&serial->dev->dev, |
| "%s - failed submitting read urb, error %d\n", |
| __func__, retval); |
| goto exit; |
| } |
| } |
| command_info->port_running++; |
| |
| exit: |
| mutex_unlock(&command_info->mutex); |
| return retval; |
| } |
| |
| |
| static void stop_command_port(struct usb_serial *serial) |
| { |
| struct usb_serial_port *command_port; |
| struct whiteheat_command_private *command_info; |
| |
| command_port = serial->port[COMMAND_PORT]; |
| command_info = usb_get_serial_port_data(command_port); |
| mutex_lock(&command_info->mutex); |
| command_info->port_running--; |
| if (!command_info->port_running) |
| usb_kill_urb(command_port->read_urb); |
| mutex_unlock(&command_info->mutex); |
| } |
| |
| |
| static int start_port_read(struct usb_serial_port *port) |
| { |
| struct whiteheat_private *info = usb_get_serial_port_data(port); |
| struct whiteheat_urb_wrap *wrap; |
| struct urb *urb; |
| int retval = 0; |
| unsigned long flags; |
| struct list_head *tmp; |
| struct list_head *tmp2; |
| |
| spin_lock_irqsave(&info->lock, flags); |
| |
| list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) { |
| list_del(tmp); |
| wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); |
| urb = wrap->urb; |
| urb->dev = port->serial->dev; |
| spin_unlock_irqrestore(&info->lock, flags); |
| retval = usb_submit_urb(urb, GFP_KERNEL); |
| if (retval) { |
| spin_lock_irqsave(&info->lock, flags); |
| list_add(tmp, &info->rx_urbs_free); |
| list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) { |
| wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); |
| urb = wrap->urb; |
| list_del(tmp); |
| spin_unlock_irqrestore(&info->lock, flags); |
| usb_kill_urb(urb); |
| spin_lock_irqsave(&info->lock, flags); |
| list_add(tmp, &info->rx_urbs_free); |
| } |
| break; |
| } |
| spin_lock_irqsave(&info->lock, flags); |
| list_add(tmp, &info->rx_urbs_submitted); |
| } |
| |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| return retval; |
| } |
| |
| |
| static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, |
| struct list_head *head) |
| { |
| struct whiteheat_urb_wrap *wrap; |
| struct list_head *tmp; |
| |
| list_for_each(tmp, head) { |
| wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); |
| if (wrap->urb == urb) |
| return wrap; |
| } |
| |
| return NULL; |
| } |
| |
| |
| static struct list_head *list_first(struct list_head *head) |
| { |
| return head->next; |
| } |
| |
| |
| static void rx_data_softint(struct work_struct *work) |
| { |
| struct whiteheat_private *info = |
| container_of(work, struct whiteheat_private, rx_work); |
| struct usb_serial_port *port = info->port; |
| struct tty_struct *tty = tty_port_tty_get(&port->port); |
| struct whiteheat_urb_wrap *wrap; |
| struct urb *urb; |
| unsigned long flags; |
| struct list_head *tmp; |
| struct list_head *tmp2; |
| int result; |
| int sent = 0; |
| |
| spin_lock_irqsave(&info->lock, flags); |
| if (info->flags & THROTTLED) { |
| spin_unlock_irqrestore(&info->lock, flags); |
| goto out; |
| } |
| |
| list_for_each_safe(tmp, tmp2, &info->rx_urb_q) { |
| list_del(tmp); |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| wrap = list_entry(tmp, struct whiteheat_urb_wrap, list); |
| urb = wrap->urb; |
| |
| if (tty && urb->actual_length) |
| sent += tty_insert_flip_string(tty, |
| urb->transfer_buffer, urb->actual_length); |
| |
| urb->dev = port->serial->dev; |
| result = usb_submit_urb(urb, GFP_ATOMIC); |
| if (result) { |
| dev_err(&port->dev, |
| "%s - failed resubmitting read urb, error %d\n", |
| __func__, result); |
| spin_lock_irqsave(&info->lock, flags); |
| list_add(tmp, &info->rx_urbs_free); |
| continue; |
| } |
| |
| spin_lock_irqsave(&info->lock, flags); |
| list_add(tmp, &info->rx_urbs_submitted); |
| } |
| spin_unlock_irqrestore(&info->lock, flags); |
| |
| if (sent) |
| tty_flip_buffer_push(tty); |
| out: |
| tty_kref_put(tty); |
| } |
| |
| |
| /***************************************************************************** |
| * Connect Tech's White Heat module functions |
| *****************************************************************************/ |
| static int __init whiteheat_init(void) |
| { |
| int retval; |
| retval = usb_serial_register(&whiteheat_fake_device); |
| if (retval) |
| goto failed_fake_register; |
| retval = usb_serial_register(&whiteheat_device); |
| if (retval) |
| goto failed_device_register; |
| retval = usb_register(&whiteheat_driver); |
| if (retval) |
| goto failed_usb_register; |
| printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
| DRIVER_DESC "\n"); |
| return 0; |
| failed_usb_register: |
| usb_serial_deregister(&whiteheat_device); |
| failed_device_register: |
| usb_serial_deregister(&whiteheat_fake_device); |
| failed_fake_register: |
| return retval; |
| } |
| |
| |
| static void __exit whiteheat_exit(void) |
| { |
| usb_deregister(&whiteheat_driver); |
| usb_serial_deregister(&whiteheat_fake_device); |
| usb_serial_deregister(&whiteheat_device); |
| } |
| |
| |
| module_init(whiteheat_init); |
| module_exit(whiteheat_exit); |
| |
| MODULE_AUTHOR(DRIVER_AUTHOR); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| |
| MODULE_FIRMWARE("whiteheat.fw"); |
| MODULE_FIRMWARE("whiteheat_loader.fw"); |
| |
| module_param(urb_pool_size, int, 0); |
| MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering"); |
| |
| module_param(debug, bool, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Debug enabled or not"); |