zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/usb/serial/whiteheat.c b/ap/os/linux/linux-3.4.x/drivers/usb/serial/whiteheat.c
new file mode 100644
index 0000000..bf7014d
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/usb/serial/whiteheat.c
@@ -0,0 +1,1476 @@
+/*
+ * 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 bool 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,
+};
+
+/* 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)",
+ .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",
+ .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,
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+ &whiteheat_fake_device, &whiteheat_device, NULL
+};
+
+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);
+ kfree(command);
+ 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 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->transfer_buffer_length = bytes;
+ result = usb_submit_urb(urb, GFP_ATOMIC);
+ if (result) {
+ dev_err_console(port,
+ "%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 (!urb->actual_length) {
+ dev_dbg(&urb->dev->dev, "%s - empty response, exiting.\n", __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) &&
+ (urb->actual_length - 1 <= sizeof(command_info->result_buffer))) {
+ 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 */
+ 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;
+ 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 - port->serial->minor + 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);
+
+ 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;
+ 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);
+
+ 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);
+}
+
+module_usb_serial_driver(whiteheat_driver, serial_drivers);
+
+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");