--- /dev/null
+/* vi: ts=8 sw=8
+ *
+ * TI 3410/5052 USB Serial Driver
+ *
+ * Copyright (C) 2004 Texas Instruments
+ *
+ * This driver is based on the Linux io_ti driver, which is
+ * Copyright (C) 2000-2002 Inside Out Networks
+ * Copyright (C) 2001-2002 Greg Kroah-Hartman
+ *
+ * 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.
+ *
+ * For questions or problems with this driver, contact Texas Instruments
+ * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
+ * Peter Berger <pberger@brimson.com>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/firmware.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/ioctl.h>
+#include <linux/serial.h>
+#include <linux/kfifo.h>
+#include <linux/mutex.h>
+#include <linux/uaccess.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+
+#include "ti_usb_3410_5052.h"
+
+/* Defines */
+
+#define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
+#define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
+
+#define TI_FIRMWARE_BUF_SIZE 16284
+
+#define TI_TRANSFER_TIMEOUT 2
+
+#define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
+
+/* supported setserial flags */
+#define TI_SET_SERIAL_FLAGS 0
+
+/* read urb states */
+#define TI_READ_URB_RUNNING 0
+#define TI_READ_URB_STOPPING 1
+#define TI_READ_URB_STOPPED 2
+
+#define TI_EXTRA_VID_PID_COUNT 5
+
+
+/* Structures */
+
+struct ti_port {
+ int tp_is_open;
+ __u8 tp_msr;
+ __u8 tp_shadow_mcr;
+ __u8 tp_uart_mode; /* 232 or 485 modes */
+ unsigned int tp_uart_base_addr;
+ int tp_flags;
+ struct ti_device *tp_tdev;
+ struct usb_serial_port *tp_port;
+ spinlock_t tp_lock;
+ int tp_read_urb_state;
+ int tp_write_urb_in_use;
+};
+
+struct ti_device {
+ struct mutex td_open_close_lock;
+ int td_open_port_count;
+ struct usb_serial *td_serial;
+ int td_is_3410;
+ int td_urb_error;
+};
+
+
+/* Function Declarations */
+
+static int ti_startup(struct usb_serial *serial);
+static void ti_release(struct usb_serial *serial);
+static int ti_port_probe(struct usb_serial_port *port);
+static int ti_port_remove(struct usb_serial_port *port);
+static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
+static void ti_close(struct usb_serial_port *port);
+static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
+ const unsigned char *data, int count);
+static int ti_write_room(struct tty_struct *tty);
+static int ti_chars_in_buffer(struct tty_struct *tty);
+static bool ti_tx_empty(struct usb_serial_port *port);
+static void ti_throttle(struct tty_struct *tty);
+static void ti_unthrottle(struct tty_struct *tty);
+static int ti_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg);
+static void ti_set_termios(struct tty_struct *tty,
+ struct usb_serial_port *port, struct ktermios *old_termios);
+static int ti_tiocmget(struct tty_struct *tty);
+static int ti_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear);
+static void ti_break(struct tty_struct *tty, int break_state);
+static void ti_interrupt_callback(struct urb *urb);
+static void ti_bulk_in_callback(struct urb *urb);
+static void ti_bulk_out_callback(struct urb *urb);
+
+static void ti_recv(struct usb_serial_port *port, unsigned char *data,
+ int length);
+static void ti_send(struct ti_port *tport);
+static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
+static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
+static int ti_get_serial_info(struct ti_port *tport,
+ struct serial_struct __user *ret_arg);
+static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
+ struct serial_struct __user *new_arg);
+static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
+
+static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
+static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
+
+static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
+ __u16 moduleid, __u16 value, __u8 *data, int size);
+static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
+ __u16 moduleid, __u16 value, __u8 *data, int size);
+
+static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
+ unsigned long addr, __u8 mask, __u8 byte);
+
+static int ti_download_firmware(struct ti_device *tdev);
+
+
+/* Data */
+
+/* module parameters */
+static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
+
+/* supported devices */
+static const struct usb_device_id ti_id_table_3410[] = {
+ { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
+ { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
+ { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
+ { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
+ { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
+ { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
+ { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
+ { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
+ { } /* terminator */
+};
+
+static const struct usb_device_id ti_id_table_5052[] = {
+ { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
+ { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
+ { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
+ { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
+ { } /* terminator */
+};
+
+static const struct usb_device_id ti_id_table_combined[] = {
+ { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
+ { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
+ { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
+ { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
+ { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
+ { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
+ { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
+ { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
+ { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
+ { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
+ { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
+ { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
+ { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
+ { } /* terminator */
+};
+
+static struct usb_serial_driver ti_1port_device = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "ti_usb_3410_5052_1",
+ },
+ .description = "TI USB 3410 1 port adapter",
+ .id_table = ti_id_table_3410,
+ .num_ports = 1,
+ .attach = ti_startup,
+ .release = ti_release,
+ .port_probe = ti_port_probe,
+ .port_remove = ti_port_remove,
+ .open = ti_open,
+ .close = ti_close,
+ .write = ti_write,
+ .write_room = ti_write_room,
+ .chars_in_buffer = ti_chars_in_buffer,
+ .tx_empty = ti_tx_empty,
+ .throttle = ti_throttle,
+ .unthrottle = ti_unthrottle,
+ .ioctl = ti_ioctl,
+ .set_termios = ti_set_termios,
+ .tiocmget = ti_tiocmget,
+ .tiocmset = ti_tiocmset,
+ .tiocmiwait = usb_serial_generic_tiocmiwait,
+ .get_icount = usb_serial_generic_get_icount,
+ .break_ctl = ti_break,
+ .read_int_callback = ti_interrupt_callback,
+ .read_bulk_callback = ti_bulk_in_callback,
+ .write_bulk_callback = ti_bulk_out_callback,
+};
+
+static struct usb_serial_driver ti_2port_device = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "ti_usb_3410_5052_2",
+ },
+ .description = "TI USB 5052 2 port adapter",
+ .id_table = ti_id_table_5052,
+ .num_ports = 2,
+ .attach = ti_startup,
+ .release = ti_release,
+ .port_probe = ti_port_probe,
+ .port_remove = ti_port_remove,
+ .open = ti_open,
+ .close = ti_close,
+ .write = ti_write,
+ .write_room = ti_write_room,
+ .chars_in_buffer = ti_chars_in_buffer,
+ .tx_empty = ti_tx_empty,
+ .throttle = ti_throttle,
+ .unthrottle = ti_unthrottle,
+ .ioctl = ti_ioctl,
+ .set_termios = ti_set_termios,
+ .tiocmget = ti_tiocmget,
+ .tiocmset = ti_tiocmset,
+ .tiocmiwait = usb_serial_generic_tiocmiwait,
+ .get_icount = usb_serial_generic_get_icount,
+ .break_ctl = ti_break,
+ .read_int_callback = ti_interrupt_callback,
+ .read_bulk_callback = ti_bulk_in_callback,
+ .write_bulk_callback = ti_bulk_out_callback,
+};
+
+static struct usb_serial_driver * const serial_drivers[] = {
+ &ti_1port_device, &ti_2port_device, NULL
+};
+
+/* Module */
+
+MODULE_AUTHOR(TI_DRIVER_AUTHOR);
+MODULE_DESCRIPTION(TI_DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+MODULE_FIRMWARE("ti_3410.fw");
+MODULE_FIRMWARE("ti_5052.fw");
+MODULE_FIRMWARE("mts_cdma.fw");
+MODULE_FIRMWARE("mts_gsm.fw");
+MODULE_FIRMWARE("mts_edge.fw");
+MODULE_FIRMWARE("mts_mt9234mu.fw");
+MODULE_FIRMWARE("mts_mt9234zba.fw");
+
+module_param(closing_wait, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(closing_wait,
+ "Maximum wait for data to drain in close, in .01 secs, default is 4000");
+
+MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
+
+module_usb_serial_driver(serial_drivers, ti_id_table_combined);
+
+/* Functions */
+
+static int ti_startup(struct usb_serial *serial)
+{
+ struct ti_device *tdev;
+ struct usb_device *dev = serial->dev;
+ int status;
+
+ dev_dbg(&dev->dev,
+ "%s - product 0x%4X, num configurations %d, configuration value %d\n",
+ __func__, le16_to_cpu(dev->descriptor.idProduct),
+ dev->descriptor.bNumConfigurations,
+ dev->actconfig->desc.bConfigurationValue);
+
+ /* create device structure */
+ tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
+ if (!tdev)
+ return -ENOMEM;
+
+ mutex_init(&tdev->td_open_close_lock);
+ tdev->td_serial = serial;
+ usb_set_serial_data(serial, tdev);
+
+ /* determine device type */
+ if (serial->type == &ti_1port_device)
+ tdev->td_is_3410 = 1;
+ dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
+ tdev->td_is_3410 ? "3410" : "5052");
+
+ /* if we have only 1 configuration, download firmware */
+ if (dev->descriptor.bNumConfigurations == 1) {
+ status = ti_download_firmware(tdev);
+
+ if (status != 0)
+ goto free_tdev;
+
+ /* 3410 must be reset, 5052 resets itself */
+ if (tdev->td_is_3410) {
+ msleep_interruptible(100);
+ usb_reset_device(dev);
+ }
+
+ status = -ENODEV;
+ goto free_tdev;
+ }
+
+ /* the second configuration must be set */
+ if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
+ status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
+ status = status ? status : -ENODEV;
+ goto free_tdev;
+ }
+
+ return 0;
+
+free_tdev:
+ kfree(tdev);
+ usb_set_serial_data(serial, NULL);
+ return status;
+}
+
+
+static void ti_release(struct usb_serial *serial)
+{
+ struct ti_device *tdev = usb_get_serial_data(serial);
+
+ kfree(tdev);
+}
+
+static int ti_port_probe(struct usb_serial_port *port)
+{
+ struct ti_port *tport;
+
+ tport = kzalloc(sizeof(*tport), GFP_KERNEL);
+ if (!tport)
+ return -ENOMEM;
+
+ spin_lock_init(&tport->tp_lock);
+ if (port == port->serial->port[0])
+ tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
+ else
+ tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
+ port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
+ tport->tp_port = port;
+ tport->tp_tdev = usb_get_serial_data(port->serial);
+ tport->tp_uart_mode = 0; /* default is RS232 */
+
+ usb_set_serial_port_data(port, tport);
+
+ port->port.drain_delay = 3;
+
+ return 0;
+}
+
+static int ti_port_remove(struct usb_serial_port *port)
+{
+ struct ti_port *tport;
+
+ tport = usb_get_serial_port_data(port);
+ kfree(tport);
+
+ return 0;
+}
+
+static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ struct ti_device *tdev;
+ struct usb_device *dev;
+ struct urb *urb;
+ int port_number;
+ int status;
+ __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
+ TI_PIPE_TIMEOUT_ENABLE |
+ (TI_TRANSFER_TIMEOUT << 2));
+
+ if (tport == NULL)
+ return -ENODEV;
+
+ dev = port->serial->dev;
+ tdev = tport->tp_tdev;
+
+ /* only one open on any port on a device at a time */
+ if (mutex_lock_interruptible(&tdev->td_open_close_lock))
+ return -ERESTARTSYS;
+
+ port_number = port->port_number;
+
+ tport->tp_msr = 0;
+ tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
+
+ /* start interrupt urb the first time a port is opened on this device */
+ if (tdev->td_open_port_count == 0) {
+ dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
+ urb = tdev->td_serial->port[0]->interrupt_in_urb;
+ if (!urb) {
+ dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
+ status = -EINVAL;
+ goto release_lock;
+ }
+ urb->context = tdev;
+ status = usb_submit_urb(urb, GFP_KERNEL);
+ if (status) {
+ dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
+ goto release_lock;
+ }
+ }
+
+ if (tty)
+ ti_set_termios(tty, port, &tty->termios);
+
+ dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
+ status = ti_command_out_sync(tdev, TI_OPEN_PORT,
+ (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
+ if (status) {
+ dev_err(&port->dev, "%s - cannot send open command, %d\n",
+ __func__, status);
+ goto unlink_int_urb;
+ }
+
+ dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
+ status = ti_command_out_sync(tdev, TI_START_PORT,
+ (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
+ if (status) {
+ dev_err(&port->dev, "%s - cannot send start command, %d\n",
+ __func__, status);
+ goto unlink_int_urb;
+ }
+
+ dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
+ status = ti_command_out_sync(tdev, TI_PURGE_PORT,
+ (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
+ if (status) {
+ dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
+ __func__, status);
+ goto unlink_int_urb;
+ }
+ status = ti_command_out_sync(tdev, TI_PURGE_PORT,
+ (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
+ if (status) {
+ dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
+ __func__, status);
+ goto unlink_int_urb;
+ }
+
+ /* reset the data toggle on the bulk endpoints to work around bug in
+ * host controllers where things get out of sync some times */
+ usb_clear_halt(dev, port->write_urb->pipe);
+ usb_clear_halt(dev, port->read_urb->pipe);
+
+ if (tty)
+ ti_set_termios(tty, port, &tty->termios);
+
+ dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
+ status = ti_command_out_sync(tdev, TI_OPEN_PORT,
+ (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
+ if (status) {
+ dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
+ __func__, status);
+ goto unlink_int_urb;
+ }
+
+ dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
+ status = ti_command_out_sync(tdev, TI_START_PORT,
+ (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
+ if (status) {
+ dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
+ __func__, status);
+ goto unlink_int_urb;
+ }
+
+ /* start read urb */
+ dev_dbg(&port->dev, "%s - start read urb\n", __func__);
+ urb = port->read_urb;
+ if (!urb) {
+ dev_err(&port->dev, "%s - no read urb\n", __func__);
+ status = -EINVAL;
+ goto unlink_int_urb;
+ }
+ tport->tp_read_urb_state = TI_READ_URB_RUNNING;
+ urb->context = tport;
+ status = usb_submit_urb(urb, GFP_KERNEL);
+ if (status) {
+ dev_err(&port->dev, "%s - submit read urb failed, %d\n",
+ __func__, status);
+ goto unlink_int_urb;
+ }
+
+ tport->tp_is_open = 1;
+ ++tdev->td_open_port_count;
+
+ goto release_lock;
+
+unlink_int_urb:
+ if (tdev->td_open_port_count == 0)
+ usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
+release_lock:
+ mutex_unlock(&tdev->td_open_close_lock);
+ dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
+ return status;
+}
+
+
+static void ti_close(struct usb_serial_port *port)
+{
+ struct ti_device *tdev;
+ struct ti_port *tport;
+ int port_number;
+ int status;
+ int do_unlock;
+ unsigned long flags;
+
+ tdev = usb_get_serial_data(port->serial);
+ tport = usb_get_serial_port_data(port);
+ if (tdev == NULL || tport == NULL)
+ return;
+
+ tport->tp_is_open = 0;
+
+ usb_kill_urb(port->read_urb);
+ usb_kill_urb(port->write_urb);
+ tport->tp_write_urb_in_use = 0;
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ kfifo_reset_out(&port->write_fifo);
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+
+ port_number = port->port_number;
+
+ dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
+ status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
+ (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
+ if (status)
+ dev_err(&port->dev,
+ "%s - cannot send close port command, %d\n"
+ , __func__, status);
+
+ /* if mutex_lock is interrupted, continue anyway */
+ do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
+ --tport->tp_tdev->td_open_port_count;
+ if (tport->tp_tdev->td_open_port_count <= 0) {
+ /* last port is closed, shut down interrupt urb */
+ usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
+ tport->tp_tdev->td_open_port_count = 0;
+ }
+ if (do_unlock)
+ mutex_unlock(&tdev->td_open_close_lock);
+}
+
+
+static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
+ const unsigned char *data, int count)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+
+ if (count == 0) {
+ dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
+ return 0;
+ }
+
+ if (tport == NULL || !tport->tp_is_open)
+ return -ENODEV;
+
+ count = kfifo_in_locked(&port->write_fifo, data, count,
+ &tport->tp_lock);
+ ti_send(tport);
+
+ return count;
+}
+
+
+static int ti_write_room(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ int room = 0;
+ unsigned long flags;
+
+ if (tport == NULL)
+ return 0;
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ room = kfifo_avail(&port->write_fifo);
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+
+ dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
+ return room;
+}
+
+
+static int ti_chars_in_buffer(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ int chars = 0;
+ unsigned long flags;
+
+ if (tport == NULL)
+ return 0;
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ chars = kfifo_len(&port->write_fifo);
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+
+ dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
+ return chars;
+}
+
+static bool ti_tx_empty(struct usb_serial_port *port)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ int ret;
+ u8 lsr;
+
+ ret = ti_get_lsr(tport, &lsr);
+ if (!ret && !(lsr & TI_LSR_TX_EMPTY))
+ return false;
+
+ return true;
+}
+
+static void ti_throttle(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct ti_port *tport = usb_get_serial_port_data(port);
+
+ if (tport == NULL)
+ return;
+
+ if (I_IXOFF(tty) || C_CRTSCTS(tty))
+ ti_stop_read(tport, tty);
+
+}
+
+
+static void ti_unthrottle(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ int status;
+
+ if (tport == NULL)
+ return;
+
+ if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
+ status = ti_restart_read(tport, tty);
+ if (status)
+ dev_err(&port->dev, "%s - cannot restart read, %d\n",
+ __func__, status);
+ }
+}
+
+static int ti_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct ti_port *tport = usb_get_serial_port_data(port);
+
+ if (tport == NULL)
+ return -ENODEV;
+
+ switch (cmd) {
+ case TIOCGSERIAL:
+ dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
+ return ti_get_serial_info(tport,
+ (struct serial_struct __user *)arg);
+ case TIOCSSERIAL:
+ dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
+ return ti_set_serial_info(tty, tport,
+ (struct serial_struct __user *)arg);
+ }
+ return -ENOIOCTLCMD;
+}
+
+
+static void ti_set_termios(struct tty_struct *tty,
+ struct usb_serial_port *port, struct ktermios *old_termios)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ struct ti_uart_config *config;
+ tcflag_t cflag, iflag;
+ int baud;
+ int status;
+ int port_number = port->port_number;
+ unsigned int mcr;
+
+ cflag = tty->termios.c_cflag;
+ iflag = tty->termios.c_iflag;
+
+ dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
+ dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
+ old_termios->c_cflag, old_termios->c_iflag);
+
+ if (tport == NULL)
+ return;
+
+ config = kmalloc(sizeof(*config), GFP_KERNEL);
+ if (!config)
+ return;
+
+ config->wFlags = 0;
+
+ /* these flags must be set */
+ config->wFlags |= TI_UART_ENABLE_MS_INTS;
+ config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
+ config->bUartMode = (__u8)(tport->tp_uart_mode);
+
+ switch (cflag & CSIZE) {
+ case CS5:
+ config->bDataBits = TI_UART_5_DATA_BITS;
+ break;
+ case CS6:
+ config->bDataBits = TI_UART_6_DATA_BITS;
+ break;
+ case CS7:
+ config->bDataBits = TI_UART_7_DATA_BITS;
+ break;
+ default:
+ case CS8:
+ config->bDataBits = TI_UART_8_DATA_BITS;
+ break;
+ }
+
+ /* CMSPAR isn't supported by this driver */
+ tty->termios.c_cflag &= ~CMSPAR;
+
+ if (cflag & PARENB) {
+ if (cflag & PARODD) {
+ config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
+ config->bParity = TI_UART_ODD_PARITY;
+ } else {
+ config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
+ config->bParity = TI_UART_EVEN_PARITY;
+ }
+ } else {
+ config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
+ config->bParity = TI_UART_NO_PARITY;
+ }
+
+ if (cflag & CSTOPB)
+ config->bStopBits = TI_UART_2_STOP_BITS;
+ else
+ config->bStopBits = TI_UART_1_STOP_BITS;
+
+ if (cflag & CRTSCTS) {
+ /* RTS flow control must be off to drop RTS for baud rate B0 */
+ if ((cflag & CBAUD) != B0)
+ config->wFlags |= TI_UART_ENABLE_RTS_IN;
+ config->wFlags |= TI_UART_ENABLE_CTS_OUT;
+ } else {
+ ti_restart_read(tport, tty);
+ }
+
+ if (I_IXOFF(tty) || I_IXON(tty)) {
+ config->cXon = START_CHAR(tty);
+ config->cXoff = STOP_CHAR(tty);
+
+ if (I_IXOFF(tty))
+ config->wFlags |= TI_UART_ENABLE_X_IN;
+ else
+ ti_restart_read(tport, tty);
+
+ if (I_IXON(tty))
+ config->wFlags |= TI_UART_ENABLE_X_OUT;
+ }
+
+ baud = tty_get_baud_rate(tty);
+ if (!baud)
+ baud = 9600;
+ if (tport->tp_tdev->td_is_3410)
+ config->wBaudRate = (__u16)((923077 + baud/2) / baud);
+ else
+ config->wBaudRate = (__u16)((461538 + baud/2) / baud);
+
+ /* FIXME: Should calculate resulting baud here and report it back */
+ if ((cflag & CBAUD) != B0)
+ tty_encode_baud_rate(tty, baud, baud);
+
+ dev_dbg(&port->dev,
+ "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d\n",
+ __func__, baud, config->wBaudRate, config->wFlags,
+ config->bDataBits, config->bParity, config->bStopBits,
+ config->cXon, config->cXoff, config->bUartMode);
+
+ cpu_to_be16s(&config->wBaudRate);
+ cpu_to_be16s(&config->wFlags);
+
+ status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
+ (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
+ sizeof(*config));
+ if (status)
+ dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
+ __func__, port_number, status);
+
+ /* SET_CONFIG asserts RTS and DTR, reset them correctly */
+ mcr = tport->tp_shadow_mcr;
+ /* if baud rate is B0, clear RTS and DTR */
+ if ((cflag & CBAUD) == B0)
+ mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
+ status = ti_set_mcr(tport, mcr);
+ if (status)
+ dev_err(&port->dev,
+ "%s - cannot set modem control on port %d, %d\n",
+ __func__, port_number, status);
+
+ kfree(config);
+}
+
+
+static int ti_tiocmget(struct tty_struct *tty)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ unsigned int result;
+ unsigned int msr;
+ unsigned int mcr;
+ unsigned long flags;
+
+ if (tport == NULL)
+ return -ENODEV;
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ msr = tport->tp_msr;
+ mcr = tport->tp_shadow_mcr;
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+
+ result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
+ | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
+ | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
+ | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
+ | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
+ | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
+ | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
+
+ dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
+
+ return result;
+}
+
+
+static int ti_tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ unsigned int mcr;
+ unsigned long flags;
+
+ if (tport == NULL)
+ return -ENODEV;
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ mcr = tport->tp_shadow_mcr;
+
+ if (set & TIOCM_RTS)
+ mcr |= TI_MCR_RTS;
+ if (set & TIOCM_DTR)
+ mcr |= TI_MCR_DTR;
+ if (set & TIOCM_LOOP)
+ mcr |= TI_MCR_LOOP;
+
+ if (clear & TIOCM_RTS)
+ mcr &= ~TI_MCR_RTS;
+ if (clear & TIOCM_DTR)
+ mcr &= ~TI_MCR_DTR;
+ if (clear & TIOCM_LOOP)
+ mcr &= ~TI_MCR_LOOP;
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+
+ return ti_set_mcr(tport, mcr);
+}
+
+
+static void ti_break(struct tty_struct *tty, int break_state)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ int status;
+
+ dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
+
+ if (tport == NULL)
+ return;
+
+ status = ti_write_byte(port, tport->tp_tdev,
+ tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
+ TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
+
+ if (status)
+ dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
+}
+
+
+static void ti_interrupt_callback(struct urb *urb)
+{
+ struct ti_device *tdev = urb->context;
+ struct usb_serial_port *port;
+ struct usb_serial *serial = tdev->td_serial;
+ struct ti_port *tport;
+ struct device *dev = &urb->dev->dev;
+ unsigned char *data = urb->transfer_buffer;
+ int length = urb->actual_length;
+ int port_number;
+ int function;
+ int status = urb->status;
+ int retval;
+ __u8 msr;
+
+ switch (status) {
+ case 0:
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
+ tdev->td_urb_error = 1;
+ return;
+ default:
+ dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
+ tdev->td_urb_error = 1;
+ goto exit;
+ }
+
+ if (length != 2) {
+ dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
+ goto exit;
+ }
+
+ if (data[0] == TI_CODE_HARDWARE_ERROR) {
+ dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
+ goto exit;
+ }
+
+ port_number = TI_GET_PORT_FROM_CODE(data[0]);
+ function = TI_GET_FUNC_FROM_CODE(data[0]);
+
+ dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
+ __func__, port_number, function, data[1]);
+
+ if (port_number >= serial->num_ports) {
+ dev_err(dev, "%s - bad port number, %d\n",
+ __func__, port_number);
+ goto exit;
+ }
+
+ port = serial->port[port_number];
+
+ tport = usb_get_serial_port_data(port);
+ if (!tport)
+ goto exit;
+
+ switch (function) {
+ case TI_CODE_DATA_ERROR:
+ dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
+ __func__, port_number, data[1]);
+ break;
+
+ case TI_CODE_MODEM_STATUS:
+ msr = data[1];
+ dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
+ ti_handle_new_msr(tport, msr);
+ break;
+
+ default:
+ dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
+ __func__, data[1]);
+ break;
+ }
+
+exit:
+ retval = usb_submit_urb(urb, GFP_ATOMIC);
+ if (retval)
+ dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
+ __func__, retval);
+}
+
+
+static void ti_bulk_in_callback(struct urb *urb)
+{
+ struct ti_port *tport = urb->context;
+ struct usb_serial_port *port = tport->tp_port;
+ struct device *dev = &urb->dev->dev;
+ int status = urb->status;
+ int retval = 0;
+
+ switch (status) {
+ case 0:
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
+ tport->tp_tdev->td_urb_error = 1;
+ return;
+ default:
+ dev_err(dev, "%s - nonzero urb status, %d\n",
+ __func__, status);
+ tport->tp_tdev->td_urb_error = 1;
+ }
+
+ if (status == -EPIPE)
+ goto exit;
+
+ if (status) {
+ dev_err(dev, "%s - stopping read!\n", __func__);
+ return;
+ }
+
+ if (urb->actual_length) {
+ usb_serial_debug_data(dev, __func__, urb->actual_length,
+ urb->transfer_buffer);
+
+ if (!tport->tp_is_open)
+ dev_dbg(dev, "%s - port closed, dropping data\n",
+ __func__);
+ else
+ ti_recv(port, urb->transfer_buffer, urb->actual_length);
+ spin_lock(&tport->tp_lock);
+ port->icount.rx += urb->actual_length;
+ spin_unlock(&tport->tp_lock);
+ }
+
+exit:
+ /* continue to read unless stopping */
+ spin_lock(&tport->tp_lock);
+ if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
+ retval = usb_submit_urb(urb, GFP_ATOMIC);
+ else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
+ tport->tp_read_urb_state = TI_READ_URB_STOPPED;
+
+ spin_unlock(&tport->tp_lock);
+ if (retval)
+ dev_err(dev, "%s - resubmit read urb failed, %d\n",
+ __func__, retval);
+}
+
+
+static void ti_bulk_out_callback(struct urb *urb)
+{
+ struct ti_port *tport = urb->context;
+ struct usb_serial_port *port = tport->tp_port;
+ int status = urb->status;
+
+ tport->tp_write_urb_in_use = 0;
+
+ switch (status) {
+ case 0:
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
+ tport->tp_tdev->td_urb_error = 1;
+ return;
+ default:
+ dev_err_console(port, "%s - nonzero urb status, %d\n",
+ __func__, status);
+ tport->tp_tdev->td_urb_error = 1;
+ }
+
+ /* send any buffered data */
+ ti_send(tport);
+}
+
+
+static void ti_recv(struct usb_serial_port *port, unsigned char *data,
+ int length)
+{
+ int cnt;
+
+ do {
+ 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);
+ if (cnt == 0)
+ break;
+ }
+ tty_flip_buffer_push(&port->port);
+ data += cnt;
+ length -= cnt;
+ } while (length > 0);
+}
+
+
+static void ti_send(struct ti_port *tport)
+{
+ int count, result;
+ struct usb_serial_port *port = tport->tp_port;
+ unsigned long flags;
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+
+ if (tport->tp_write_urb_in_use)
+ goto unlock;
+
+ count = kfifo_out(&port->write_fifo,
+ port->write_urb->transfer_buffer,
+ port->bulk_out_size);
+
+ if (count == 0)
+ goto unlock;
+
+ tport->tp_write_urb_in_use = 1;
+
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+
+ usb_serial_debug_data(&port->dev, __func__, count,
+ port->write_urb->transfer_buffer);
+
+ usb_fill_bulk_urb(port->write_urb, port->serial->dev,
+ usb_sndbulkpipe(port->serial->dev,
+ port->bulk_out_endpointAddress),
+ port->write_urb->transfer_buffer, count,
+ ti_bulk_out_callback, tport);
+
+ result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
+ if (result) {
+ dev_err_console(port, "%s - submit write urb failed, %d\n",
+ __func__, result);
+ tport->tp_write_urb_in_use = 0;
+ /* TODO: reschedule ti_send */
+ } else {
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ port->icount.tx += count;
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+ }
+
+ /* more room in the buffer for new writes, wakeup */
+ tty_port_tty_wakeup(&port->port);
+
+ return;
+unlock:
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+ return;
+}
+
+
+static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
+{
+ unsigned long flags;
+ int status;
+
+ status = ti_write_byte(tport->tp_port, tport->tp_tdev,
+ tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
+ TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ if (!status)
+ tport->tp_shadow_mcr = mcr;
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+
+ return status;
+}
+
+
+static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
+{
+ int size, status;
+ struct ti_device *tdev = tport->tp_tdev;
+ struct usb_serial_port *port = tport->tp_port;
+ int port_number = port->port_number;
+ struct ti_port_status *data;
+
+ size = sizeof(struct ti_port_status);
+ data = kmalloc(size, GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
+ (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
+ if (status) {
+ dev_err(&port->dev,
+ "%s - get port status command failed, %d\n",
+ __func__, status);
+ goto free_data;
+ }
+
+ dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
+
+ *lsr = data->bLSR;
+
+free_data:
+ kfree(data);
+ return status;
+}
+
+
+static int ti_get_serial_info(struct ti_port *tport,
+ struct serial_struct __user *ret_arg)
+{
+ struct usb_serial_port *port = tport->tp_port;
+ struct serial_struct ret_serial;
+ unsigned cwait;
+
+ if (!ret_arg)
+ return -EFAULT;
+
+ cwait = port->port.closing_wait;
+ if (cwait != ASYNC_CLOSING_WAIT_NONE)
+ cwait = jiffies_to_msecs(cwait) / 10;
+
+ memset(&ret_serial, 0, sizeof(ret_serial));
+
+ ret_serial.type = PORT_16550A;
+ ret_serial.line = port->minor;
+ ret_serial.port = port->port_number;
+ ret_serial.flags = tport->tp_flags;
+ ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo);
+ ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
+ ret_serial.closing_wait = cwait;
+
+ if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
+ return -EFAULT;
+
+ return 0;
+}
+
+
+static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
+ struct serial_struct __user *new_arg)
+{
+ struct serial_struct new_serial;
+ unsigned cwait;
+
+ if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
+ return -EFAULT;
+
+ cwait = new_serial.closing_wait;
+ if (cwait != ASYNC_CLOSING_WAIT_NONE)
+ cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
+
+ tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
+ tport->tp_port->port.closing_wait = cwait;
+
+ return 0;
+}
+
+
+static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
+{
+ struct async_icount *icount;
+ struct tty_struct *tty;
+ unsigned long flags;
+
+ dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
+
+ if (msr & TI_MSR_DELTA_MASK) {
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ icount = &tport->tp_port->icount;
+ if (msr & TI_MSR_DELTA_CTS)
+ icount->cts++;
+ if (msr & TI_MSR_DELTA_DSR)
+ icount->dsr++;
+ if (msr & TI_MSR_DELTA_CD)
+ icount->dcd++;
+ if (msr & TI_MSR_DELTA_RI)
+ icount->rng++;
+ wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+ }
+
+ tport->tp_msr = msr & TI_MSR_MASK;
+
+ /* handle CTS flow control */
+ tty = tty_port_tty_get(&tport->tp_port->port);
+ if (tty && C_CRTSCTS(tty)) {
+ if (msr & TI_MSR_CTS)
+ tty_wakeup(tty);
+ }
+ tty_kref_put(tty);
+}
+
+
+static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+
+ if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
+ tport->tp_read_urb_state = TI_READ_URB_STOPPING;
+
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+}
+
+
+static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
+{
+ struct urb *urb;
+ int status = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+
+ if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
+ tport->tp_read_urb_state = TI_READ_URB_RUNNING;
+ urb = tport->tp_port->read_urb;
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+ urb->context = tport;
+ status = usb_submit_urb(urb, GFP_KERNEL);
+ } else {
+ tport->tp_read_urb_state = TI_READ_URB_RUNNING;
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+ }
+
+ return status;
+}
+
+
+static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
+ __u16 moduleid, __u16 value, __u8 *data, int size)
+{
+ int status;
+
+ status = usb_control_msg(tdev->td_serial->dev,
+ usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
+ (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
+ value, moduleid, data, size, 1000);
+
+ if (status == size)
+ status = 0;
+
+ if (status > 0)
+ status = -ECOMM;
+
+ return status;
+}
+
+
+static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
+ __u16 moduleid, __u16 value, __u8 *data, int size)
+{
+ int status;
+
+ status = usb_control_msg(tdev->td_serial->dev,
+ usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
+ (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
+ value, moduleid, data, size, 1000);
+
+ if (status == size)
+ status = 0;
+
+ if (status > 0)
+ status = -ECOMM;
+
+ return status;
+}
+
+
+static int ti_write_byte(struct usb_serial_port *port,
+ struct ti_device *tdev, unsigned long addr,
+ __u8 mask, __u8 byte)
+{
+ int status;
+ unsigned int size;
+ struct ti_write_data_bytes *data;
+
+ dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
+ addr, mask, byte);
+
+ size = sizeof(struct ti_write_data_bytes) + 2;
+ data = kmalloc(size, GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->bAddrType = TI_RW_DATA_ADDR_XDATA;
+ data->bDataType = TI_RW_DATA_BYTE;
+ data->bDataCounter = 1;
+ data->wBaseAddrHi = cpu_to_be16(addr>>16);
+ data->wBaseAddrLo = cpu_to_be16(addr);
+ data->bData[0] = mask;
+ data->bData[1] = byte;
+
+ status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
+ (__u8 *)data, size);
+
+ if (status < 0)
+ dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
+
+ kfree(data);
+
+ return status;
+}
+
+static int ti_do_download(struct usb_device *dev, int pipe,
+ u8 *buffer, int size)
+{
+ int pos;
+ u8 cs = 0;
+ int done;
+ struct ti_firmware_header *header;
+ int status = 0;
+ int len;
+
+ for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
+ cs = (__u8)(cs + buffer[pos]);
+
+ header = (struct ti_firmware_header *)buffer;
+ header->wLength = cpu_to_le16((__u16)(size
+ - sizeof(struct ti_firmware_header)));
+ header->bCheckSum = cs;
+
+ dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
+ for (pos = 0; pos < size; pos += done) {
+ len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
+ status = usb_bulk_msg(dev, pipe, buffer + pos, len,
+ &done, 1000);
+ if (status)
+ break;
+ }
+ return status;
+}
+
+static int ti_download_firmware(struct ti_device *tdev)
+{
+ int status;
+ int buffer_size;
+ __u8 *buffer;
+ struct usb_device *dev = tdev->td_serial->dev;
+ unsigned int pipe = usb_sndbulkpipe(dev,
+ tdev->td_serial->port[0]->bulk_out_endpointAddress);
+ const struct firmware *fw_p;
+ char buf[32];
+
+ /* try ID specific firmware first, then try generic firmware */
+ sprintf(buf, "ti_usb-v%04x-p%04x.fw",
+ le16_to_cpu(dev->descriptor.idVendor),
+ le16_to_cpu(dev->descriptor.idProduct));
+ status = request_firmware(&fw_p, buf, &dev->dev);
+
+ if (status != 0) {
+ buf[0] = '\0';
+ if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
+ switch (le16_to_cpu(dev->descriptor.idProduct)) {
+ case MTS_CDMA_PRODUCT_ID:
+ strcpy(buf, "mts_cdma.fw");
+ break;
+ case MTS_GSM_PRODUCT_ID:
+ strcpy(buf, "mts_gsm.fw");
+ break;
+ case MTS_EDGE_PRODUCT_ID:
+ strcpy(buf, "mts_edge.fw");
+ break;
+ case MTS_MT9234MU_PRODUCT_ID:
+ strcpy(buf, "mts_mt9234mu.fw");
+ break;
+ case MTS_MT9234ZBA_PRODUCT_ID:
+ strcpy(buf, "mts_mt9234zba.fw");
+ break;
+ case MTS_MT9234ZBAOLD_PRODUCT_ID:
+ strcpy(buf, "mts_mt9234zba.fw");
+ break; }
+ }
+ if (buf[0] == '\0') {
+ if (tdev->td_is_3410)
+ strcpy(buf, "ti_3410.fw");
+ else
+ strcpy(buf, "ti_5052.fw");
+ }
+ status = request_firmware(&fw_p, buf, &dev->dev);
+ }
+ if (status) {
+ dev_err(&dev->dev, "%s - firmware not found\n", __func__);
+ return -ENOENT;
+ }
+ if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
+ dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
+ release_firmware(fw_p);
+ return -ENOENT;
+ }
+
+ buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
+ buffer = kmalloc(buffer_size, GFP_KERNEL);
+ if (buffer) {
+ memcpy(buffer, fw_p->data, fw_p->size);
+ memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
+ status = ti_do_download(dev, pipe, buffer, fw_p->size);
+ kfree(buffer);
+ } else {
+ status = -ENOMEM;
+ }
+ release_firmware(fw_p);
+ if (status) {
+ dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
+ __func__, status);
+ return status;
+ }
+
+ dev_dbg(&dev->dev, "%s - download successful\n", __func__);
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff