--- /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>.
+ *
+ * This driver needs this hotplug script in /etc/hotplug/usb/ti_usb_3410_5052
+ * or in /etc/hotplug.d/usb/ti_usb_3410_5052.hotplug to set the device
+ * configuration.
+ *
+ * #!/bin/bash
+ *
+ * BOOT_CONFIG=1
+ * ACTIVE_CONFIG=2
+ *
+ * if [[ "$ACTION" != "add" ]]
+ * then
+ * exit
+ * fi
+ *
+ * CONFIG_PATH=/sys${DEVPATH%/?*}/bConfigurationValue
+ *
+ * if [[ 0`cat $CONFIG_PATH` -ne $BOOT_CONFIG ]]
+ * then
+ * exit
+ * fi
+ *
+ * PRODUCT=${PRODUCT%/?*} # delete version
+ * VENDOR_ID=`printf "%d" 0x${PRODUCT%/?*}`
+ * PRODUCT_ID=`printf "%d" 0x${PRODUCT#*?/}`
+ *
+ * PARAM_PATH=/sys/module/ti_usb_3410_5052/parameters
+ *
+ * function scan() {
+ * s=$1
+ * shift
+ * for i
+ * do
+ * if [[ $s -eq $i ]]
+ * then
+ * return 0
+ * fi
+ * done
+ * return 1
+ * }
+ *
+ * IFS=$IFS,
+ *
+ * if (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_3410` &&
+ * scan $PRODUCT_ID 13328 `cat $PARAM_PATH/product_3410`) ||
+ * (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_5052` &&
+ * scan $PRODUCT_ID 20562 20818 20570 20575 `cat $PARAM_PATH/product_5052`)
+ * then
+ * echo $ACTIVE_CONFIG > $CONFIG_PATH
+ * fi
+ */
+
+#include <linux/config.h>
+#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/ioctl.h>
+#include <linux/serial.h>
+#include <linux/circ_buf.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+#include <linux/usb.h>
+
+#include "usb-serial.h"
+#include "ti_usb_3410_5052.h"
+#include "ti_fw_3410.h" /* firmware image for 3410 */
+#include "ti_fw_5052.h" /* firmware image for 5052 */
+
+
+/* Defines */
+
+#define TI_DRIVER_VERSION "v0.9"
+#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_WRITE_BUF_SIZE 1024
+
+#define TI_TRANSFER_TIMEOUT 2
+
+#define TI_DEFAULT_LOW_LATENCY 0
+#define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
+
+/* supported setserial flags */
+#define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY)
+
+/* 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_lsr;
+ __u8 tp_shadow_mcr;
+ __u8 tp_uart_mode; /* 232 or 485 modes */
+ unsigned int tp_uart_base_addr;
+ int tp_flags;
+ int tp_closing_wait;/* in .01 secs */
+ struct async_icount tp_icount;
+ wait_queue_head_t tp_msr_wait; /* wait for msr change */
+ wait_queue_head_t tp_write_wait;
+ 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 circ_buf *tp_write_buf;
+};
+
+struct ti_device {
+ struct semaphore td_open_close_sem;
+ 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_shutdown(struct usb_serial *serial);
+static int ti_open(struct usb_serial_port *port, struct file *file);
+static void ti_close(struct usb_serial_port *port, struct file *file);
+static int ti_write(struct usb_serial_port *port, const unsigned char *data,
+ int count);
+static int ti_write_room(struct usb_serial_port *port);
+static int ti_chars_in_buffer(struct usb_serial_port *port);
+static void ti_throttle(struct usb_serial_port *port);
+static void ti_unthrottle(struct usb_serial_port *port);
+static int ti_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
+static void ti_set_termios(struct usb_serial_port *port,
+ struct termios *old_termios);
+static int ti_tiocmget(struct usb_serial_port *port, struct file *file);
+static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
+ unsigned int set, unsigned int clear);
+static void ti_break(struct usb_serial_port *port, int break_state);
+static void ti_interrupt_callback(struct urb *urb, struct pt_regs *regs);
+static void ti_bulk_in_callback(struct urb *urb, struct pt_regs *regs);
+static void ti_bulk_out_callback(struct urb *urb, struct pt_regs *regs);
+
+static void ti_recv(struct device *dev, struct tty_struct *tty,
+ 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);
+static int ti_get_serial_info(struct ti_port *tport,
+ struct serial_struct __user *ret_arg);
+static int ti_set_serial_info(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_drain(struct ti_port *tport, unsigned long timeout, int flush);
+
+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 ti_device *tdev, unsigned long addr,
+ __u8 mask, __u8 byte);
+
+static int ti_download_firmware(struct ti_device *tdev,
+ unsigned char *firmware, unsigned int firmware_size);
+
+/* circular buffer */
+static struct circ_buf *ti_buf_alloc(void);
+static void ti_buf_free(struct circ_buf *cb);
+static void ti_buf_clear(struct circ_buf *cb);
+static int ti_buf_data_avail(struct circ_buf *cb);
+static int ti_buf_space_avail(struct circ_buf *cb);
+static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
+static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
+
+
+/* Data */
+
+/* module parameters */
+static int debug;
+static int low_latency = TI_DEFAULT_LOW_LATENCY;
+static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
+static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
+static int vendor_3410_count;
+static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
+static int product_3410_count;
+static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
+static int vendor_5052_count;
+static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
+static int product_5052_count;
+
+/* supported devices */
+/* the array dimension is the number of default entries plus */
+/* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
+/* null entry */
+static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = {
+ { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
+};
+
+static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
+ { 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) },
+};
+
+static struct usb_device_id ti_id_table_combined[] = {
+ { USB_DEVICE(TI_VENDOR_ID, TI_3410_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) },
+ { }
+};
+
+static struct usb_driver ti_usb_driver = {
+ .owner = THIS_MODULE,
+ .name = "ti_usb_3410_5052",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = ti_id_table_combined,
+};
+
+static struct usb_serial_device_type ti_1port_device = {
+ .owner = THIS_MODULE,
+ .name = "TI USB 3410 1 port adapter",
+ .id_table = ti_id_table_3410,
+ .num_interrupt_in = 1,
+ .num_bulk_in = 1,
+ .num_bulk_out = 1,
+ .num_ports = 1,
+ .attach = ti_startup,
+ .shutdown = ti_shutdown,
+ .open = ti_open,
+ .close = ti_close,
+ .write = ti_write,
+ .write_room = ti_write_room,
+ .chars_in_buffer = ti_chars_in_buffer,
+ .throttle = ti_throttle,
+ .unthrottle = ti_unthrottle,
+ .ioctl = ti_ioctl,
+ .set_termios = ti_set_termios,
+ .tiocmget = ti_tiocmget,
+ .tiocmset = ti_tiocmset,
+ .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_device_type ti_2port_device = {
+ .owner = THIS_MODULE,
+ .name = "TI USB 5052 2 port adapter",
+ .id_table = ti_id_table_5052,
+ .num_interrupt_in = 1,
+ .num_bulk_in = 2,
+ .num_bulk_out = 2,
+ .num_ports = 2,
+ .attach = ti_startup,
+ .shutdown = ti_shutdown,
+ .open = ti_open,
+ .close = ti_close,
+ .write = ti_write,
+ .write_room = ti_write_room,
+ .chars_in_buffer = ti_chars_in_buffer,
+ .throttle = ti_throttle,
+ .unthrottle = ti_unthrottle,
+ .ioctl = ti_ioctl,
+ .set_termios = ti_set_termios,
+ .tiocmget = ti_tiocmget,
+ .tiocmset = ti_tiocmset,
+ .break_ctl = ti_break,
+ .read_int_callback = ti_interrupt_callback,
+ .read_bulk_callback = ti_bulk_in_callback,
+ .write_bulk_callback = ti_bulk_out_callback,
+};
+
+
+/* Module */
+
+MODULE_AUTHOR(TI_DRIVER_AUTHOR);
+MODULE_DESCRIPTION(TI_DRIVER_DESC);
+MODULE_VERSION(TI_DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
+
+module_param(low_latency, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off");
+
+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_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
+MODULE_PARM_DESC(vendor_3410, "Vendor ids for 3410 based devices, 1-5 short integers");
+module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
+MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers");
+module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
+MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers");
+module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
+MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers");
+
+MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
+
+
+/* Functions */
+
+static int __init ti_init(void)
+{
+ int i,j;
+ int ret;
+
+
+ /* insert extra vendor and product ids */
+ j = sizeof(ti_id_table_3410)/sizeof(struct usb_device_id)
+ - TI_EXTRA_VID_PID_COUNT - 1;
+ for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) {
+ ti_id_table_3410[j].idVendor = vendor_3410[i];
+ ti_id_table_3410[j].idProduct = product_3410[i];
+ ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
+ }
+ j = sizeof(ti_id_table_5052)/sizeof(struct usb_device_id)
+ - TI_EXTRA_VID_PID_COUNT - 1;
+ for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) {
+ ti_id_table_5052[j].idVendor = vendor_5052[i];
+ ti_id_table_5052[j].idProduct = product_5052[i];
+ ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
+ }
+
+ ret = usb_serial_register(&ti_1port_device);
+ if (ret)
+ goto failed_1port;
+ ret = usb_serial_register(&ti_2port_device);
+ if (ret)
+ goto failed_2port;
+
+ ret = usb_register(&ti_usb_driver);
+ if (ret)
+ goto failed_usb;
+
+ info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
+
+ return 0;
+
+failed_usb:
+ usb_serial_deregister(&ti_2port_device);
+failed_2port:
+ usb_serial_deregister(&ti_1port_device);
+failed_1port:
+ return ret;
+}
+
+
+static void __exit ti_exit(void)
+{
+ usb_serial_deregister(&ti_1port_device);
+ usb_serial_deregister(&ti_2port_device);
+ usb_deregister(&ti_usb_driver);
+}
+
+
+module_init(ti_init);
+module_exit(ti_exit);
+
+
+static int ti_startup(struct usb_serial *serial)
+{
+ struct ti_device *tdev;
+ struct ti_port *tport;
+ struct usb_device *dev = serial->dev;
+ int status;
+ int i;
+
+
+ dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
+ __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct),
+ dev->descriptor.bNumConfigurations,
+ dev->actconfig->desc.bConfigurationValue);
+
+ /* create device structure */
+ tdev = kmalloc(sizeof(struct ti_device), GFP_KERNEL);
+ if (tdev == NULL) {
+ dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
+ return -ENOMEM;
+ }
+ memset(tdev, 0, sizeof(struct ti_device));
+ sema_init(&tdev->td_open_close_sem, 1);
+ tdev->td_serial = serial;
+ usb_set_serial_data(serial, tdev);
+
+ /* determine device type */
+ if (usb_match_id(serial->interface, ti_id_table_3410))
+ tdev->td_is_3410 = 1;
+ dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052");
+
+ /* if we have only 1 configuration, download firmware */
+ if (dev->descriptor.bNumConfigurations == 1) {
+
+ if (tdev->td_is_3410)
+ status = ti_download_firmware(tdev, ti_fw_3410,
+ sizeof(ti_fw_3410));
+ else
+ status = ti_download_firmware(tdev, ti_fw_5052,
+ sizeof(ti_fw_5052));
+ if (status)
+ 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 (in sysfs by hotplug script) */
+ if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
+ status = -ENODEV;
+ goto free_tdev;
+ }
+
+ /* set up port structures */
+ for (i = 0; i < serial->num_ports; ++i) {
+ tport = kmalloc(sizeof(struct ti_port), GFP_KERNEL);
+ if (tport == NULL) {
+ dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
+ status = -ENOMEM;
+ goto free_tports;
+ }
+ memset(tport, 0, sizeof(struct ti_port));
+ spin_lock_init(&tport->tp_lock);
+ tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
+ tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
+ tport->tp_closing_wait = closing_wait;
+ init_waitqueue_head(&tport->tp_msr_wait);
+ init_waitqueue_head(&tport->tp_write_wait);
+ tport->tp_write_buf = ti_buf_alloc();
+ if (tport->tp_write_buf == NULL) {
+ dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
+ kfree(tport);
+ status = -ENOMEM;
+ goto free_tports;
+ }
+ tport->tp_port = serial->port[i];
+ tport->tp_tdev = tdev;
+ usb_set_serial_port_data(serial->port[i], tport);
+ tport->tp_uart_mode = 0; /* default is RS232 */
+ }
+
+ return 0;
+
+free_tports:
+ for (--i; i>=0; --i) {
+ tport = usb_get_serial_port_data(serial->port[i]);
+ ti_buf_free(tport->tp_write_buf);
+ kfree(tport);
+ usb_set_serial_port_data(serial->port[i], NULL);
+ }
+free_tdev:
+ kfree(tdev);
+ usb_set_serial_data(serial, NULL);
+ return status;
+}
+
+
+static void ti_shutdown(struct usb_serial *serial)
+{
+ int i;
+ struct ti_device *tdev = usb_get_serial_data(serial);
+ struct ti_port *tport;
+
+ dbg("%s", __FUNCTION__);
+
+ for (i=0; i < serial->num_ports; ++i) {
+ tport = usb_get_serial_port_data(serial->port[i]);
+ if (tport) {
+ ti_buf_free(tport->tp_write_buf);
+ kfree(tport);
+ usb_set_serial_port_data(serial->port[i], NULL);
+ }
+ }
+
+ if (tdev)
+ kfree(tdev);
+ usb_set_serial_data(serial, NULL);
+}
+
+
+static int ti_open(struct usb_serial_port *port, struct file *file)
+{
+ 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));
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ 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 (down_interruptible(&tdev->td_open_close_sem))
+ return -ERESTARTSYS;
+
+ if (port->tty)
+ port->tty->low_latency =
+ (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+
+ port_number = port->number - port->serial->minor;
+
+ memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
+
+ 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) {
+ dbg("%s - start interrupt in urb", __FUNCTION__);
+ urb = tdev->td_serial->port[0]->interrupt_in_urb;
+ if (!urb) {
+ dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__);
+ status = -EINVAL;
+ goto up_sem;
+ }
+ urb->complete = ti_interrupt_callback;
+ urb->context = tdev;
+ urb->dev = dev;
+ status = usb_submit_urb(urb, GFP_KERNEL);
+ if (status) {
+ dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status);
+ goto up_sem;
+ }
+ }
+
+ ti_set_termios(port, NULL);
+
+ dbg("%s - sending TI_OPEN_PORT", __FUNCTION__);
+ 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", __FUNCTION__, status);
+ goto unlink_int_urb;
+ }
+
+ dbg("%s - sending TI_START_PORT", __FUNCTION__);
+ 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", __FUNCTION__, status);
+ goto unlink_int_urb;
+ }
+
+ dbg("%s - sending TI_PURGE_PORT", __FUNCTION__);
+ 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", __FUNCTION__, 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", __FUNCTION__, 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);
+
+ ti_set_termios(port, NULL);
+
+ dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__);
+ 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", __FUNCTION__, status);
+ goto unlink_int_urb;
+ }
+
+ dbg("%s - sending TI_START_PORT (2)", __FUNCTION__);
+ 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", __FUNCTION__, status);
+ goto unlink_int_urb;
+ }
+
+ /* start read urb */
+ dbg("%s - start read urb", __FUNCTION__);
+ urb = port->read_urb;
+ if (!urb) {
+ dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__);
+ status = -EINVAL;
+ goto unlink_int_urb;
+ }
+ tport->tp_read_urb_state = TI_READ_URB_RUNNING;
+ urb->complete = ti_bulk_in_callback;
+ urb->context = tport;
+ urb->dev = dev;
+ status = usb_submit_urb(urb, GFP_KERNEL);
+ if (status) {
+ dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status);
+ goto unlink_int_urb;
+ }
+
+ tport->tp_is_open = 1;
+ ++tdev->td_open_port_count;
+
+ goto up_sem;
+
+unlink_int_urb:
+ if (tdev->td_open_port_count == 0)
+ usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
+up_sem:
+ up(&tdev->td_open_close_sem);
+ dbg("%s - exit %d", __FUNCTION__, status);
+ return status;
+}
+
+
+static void ti_close(struct usb_serial_port *port, struct file *file)
+{
+ struct ti_device *tdev;
+ struct ti_port *tport;
+ int port_number;
+ int status;
+ int do_up;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ 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;
+
+ ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
+
+ usb_kill_urb(port->read_urb);
+ usb_kill_urb(port->write_urb);
+ tport->tp_write_urb_in_use = 0;
+
+ port_number = port->number - port->serial->minor;
+
+ dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__);
+ 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" , __FUNCTION__, status);
+
+ /* if down is interrupted, continue anyway */
+ do_up = !down_interruptible(&tdev->td_open_close_sem);
+ --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_up)
+ up(&tdev->td_open_close_sem);
+
+ dbg("%s - exit", __FUNCTION__);
+}
+
+
+static int ti_write(struct usb_serial_port *port, const unsigned char *data,
+ int count)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ unsigned long flags;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (count == 0) {
+ dbg("%s - write request of 0 bytes", __FUNCTION__);
+ return 0;
+ }
+
+ if (tport == NULL || !tport->tp_is_open)
+ return -ENODEV;
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ count = ti_buf_put(tport->tp_write_buf, data, count);
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+
+ ti_send(tport);
+
+ return count;
+}
+
+
+static int ti_write_room(struct usb_serial_port *port)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ int room = 0;
+ unsigned long flags;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (tport == NULL)
+ return -ENODEV;
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ room = ti_buf_space_avail(tport->tp_write_buf);
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+
+ dbg("%s - returns %d", __FUNCTION__, room);
+ return room;
+}
+
+
+static int ti_chars_in_buffer(struct usb_serial_port *port)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ int chars = 0;
+ unsigned long flags;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (tport == NULL)
+ return -ENODEV;
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ chars = ti_buf_data_avail(tport->tp_write_buf);
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+
+ dbg("%s - returns %d", __FUNCTION__, chars);
+ return chars;
+}
+
+
+static void ti_throttle(struct usb_serial_port *port)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ struct tty_struct *tty;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (tport == NULL)
+ return;
+
+ tty = port->tty;
+ if (!tty) {
+ dbg("%s - no tty", __FUNCTION__);
+ return;
+ }
+
+ if (I_IXOFF(tty) || C_CRTSCTS(tty))
+ ti_stop_read(tport, tty);
+
+}
+
+
+static void ti_unthrottle(struct usb_serial_port *port)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ struct tty_struct *tty;
+ int status;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (tport == NULL)
+ return;
+
+ tty = port->tty;
+ if (!tty) {
+ dbg("%s - no tty", __FUNCTION__);
+ 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", __FUNCTION__, status);
+ }
+}
+
+
+static int ti_ioctl(struct usb_serial_port *port, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ struct async_icount cnow;
+ struct async_icount cprev;
+
+ dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd);
+
+ if (tport == NULL)
+ return -ENODEV;
+
+ switch (cmd) {
+ case TIOCGSERIAL:
+ dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
+ return ti_get_serial_info(tport, (struct serial_struct __user *)arg);
+ break;
+
+ case TIOCSSERIAL:
+ dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
+ return ti_set_serial_info(tport, (struct serial_struct __user *)arg);
+ break;
+
+ case TIOCMIWAIT:
+ dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
+ cprev = tport->tp_icount;
+ while (1) {
+ interruptible_sleep_on(&tport->tp_msr_wait);
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ cnow = tport->tp_icount;
+ if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
+ cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
+ return -EIO; /* no change => error */
+ if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
+ ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
+ ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
+ ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
+ return 0;
+ }
+ cprev = cnow;
+ }
+ break;
+
+ case TIOCGICOUNT:
+ dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx);
+ if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount)))
+ return -EFAULT;
+ return 0;
+ }
+
+ return -ENOIOCTLCMD;
+}
+
+
+static void ti_set_termios(struct usb_serial_port *port,
+ struct termios *old_termios)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ struct tty_struct *tty = port->tty;
+ struct ti_uart_config *config;
+ tcflag_t cflag,iflag;
+ int baud;
+ int status;
+ int port_number = port->number - port->serial->minor;
+ unsigned int mcr;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (!tty || !tty->termios) {
+ dbg("%s - no tty or termios", __FUNCTION__);
+ return;
+ }
+
+ cflag = tty->termios->c_cflag;
+ iflag = tty->termios->c_iflag;
+
+ if (old_termios && cflag == old_termios->c_cflag
+ && iflag == old_termios->c_iflag) {
+ dbg("%s - nothing to change", __FUNCTION__);
+ return;
+ }
+
+ dbg("%s - clfag %08x, iflag %08x", __FUNCTION__, cflag, iflag);
+
+ if (old_termios)
+ dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag);
+
+ if (tport == NULL)
+ return;
+
+ config = kmalloc(sizeof(*config), GFP_KERNEL);
+ if (!config) {
+ dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
+ 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;
+ }
+
+ 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 {
+ tty->hw_stopped = 0;
+ 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);
+
+ dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
+ __FUNCTION__, 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", __FUNCTION__, 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", __FUNCTION__, port_number, status);
+
+ kfree(config);
+}
+
+
+static int ti_tiocmget(struct usb_serial_port *port, struct file *file)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ unsigned int result;
+ unsigned int msr;
+ unsigned int mcr;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (tport == NULL)
+ return -ENODEV;
+
+ msr = tport->tp_msr;
+ mcr = tport->tp_shadow_mcr;
+
+ 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);
+
+ dbg("%s - 0x%04X", __FUNCTION__, result);
+
+ return result;
+}
+
+
+static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ unsigned int mcr;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (tport == NULL)
+ return -ENODEV;
+
+ 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;
+
+ return ti_set_mcr(tport, mcr);
+}
+
+
+static void ti_break(struct usb_serial_port *port, int break_state)
+{
+ struct ti_port *tport = usb_get_serial_port_data(port);
+ int status;
+
+ dbg("%s - state = %d", __FUNCTION__, break_state);
+
+ if (tport == NULL)
+ return;
+
+ ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
+
+ status = ti_write_byte(tport->tp_tdev,
+ tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
+ TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
+
+ if (status)
+ dbg("%s - error setting break, %d", __FUNCTION__, status);
+}
+
+
+static void ti_interrupt_callback(struct urb *urb, struct pt_regs *regs)
+{
+ struct ti_device *tdev = (struct ti_device *)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;
+ __u8 msr;
+
+ dbg("%s", __FUNCTION__);
+
+ switch (urb->status) {
+ case 0:
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
+ tdev->td_urb_error = 1;
+ return;
+ default:
+ dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
+ tdev->td_urb_error = 1;
+ goto exit;
+ }
+
+ if (length != 2) {
+ dbg("%s - bad packet size, %d", __FUNCTION__, length);
+ goto exit;
+ }
+
+ if (data[0] == TI_CODE_HARDWARE_ERROR) {
+ dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]);
+ goto exit;
+ }
+
+ port_number = TI_GET_PORT_FROM_CODE(data[0]);
+ function = TI_GET_FUNC_FROM_CODE(data[0]);
+
+ dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]);
+
+ if (port_number >= serial->num_ports) {
+ dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, 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", __FUNCTION__, port_number, data[1]);
+ break;
+
+ case TI_CODE_MODEM_STATUS:
+ msr = data[1];
+ dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr);
+ ti_handle_new_msr(tport, msr);
+ break;
+
+ default:
+ dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]);
+ break;
+ }
+
+exit:
+ status = usb_submit_urb(urb, GFP_ATOMIC);
+ if (status)
+ dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", __FUNCTION__, status);
+}
+
+
+static void ti_bulk_in_callback(struct urb *urb, struct pt_regs *regs)
+{
+ struct ti_port *tport = (struct ti_port *)urb->context;
+ struct usb_serial_port *port = tport->tp_port;
+ struct device *dev = &urb->dev->dev;
+ int status = 0;
+
+ dbg("%s", __FUNCTION__);
+
+ switch (urb->status) {
+ case 0:
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
+ tport->tp_tdev->td_urb_error = 1;
+ wake_up_interruptible(&tport->tp_write_wait);
+ return;
+ default:
+ dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status );
+ tport->tp_tdev->td_urb_error = 1;
+ wake_up_interruptible(&tport->tp_write_wait);
+ }
+
+ if (urb->status == -EPIPE)
+ goto exit;
+
+ if (urb->status) {
+ dev_err(dev, "%s - stopping read!\n", __FUNCTION__);
+ return;
+ }
+
+ if (port->tty && urb->actual_length) {
+ usb_serial_debug_data(debug, dev, __FUNCTION__,
+ urb->actual_length, urb->transfer_buffer);
+
+ if (!tport->tp_is_open)
+ dbg("%s - port closed, dropping data", __FUNCTION__);
+ else
+ ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer,
+ urb->actual_length);
+
+ spin_lock(&tport->tp_lock);
+ tport->tp_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) {
+ urb->dev = port->serial->dev;
+ status = 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 (status)
+ dev_err(dev, "%s - resubmit read urb failed, %d\n", __FUNCTION__, status);
+}
+
+
+static void ti_bulk_out_callback(struct urb *urb, struct pt_regs *regs)
+{
+ struct ti_port *tport = (struct ti_port *)urb->context;
+ struct usb_serial_port *port = tport->tp_port;
+ struct device *dev = &urb->dev->dev;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ tport->tp_write_urb_in_use = 0;
+
+ switch (urb->status) {
+ case 0:
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
+ tport->tp_tdev->td_urb_error = 1;
+ wake_up_interruptible(&tport->tp_write_wait);
+ return;
+ default:
+ dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
+ tport->tp_tdev->td_urb_error = 1;
+ wake_up_interruptible(&tport->tp_write_wait);
+ }
+
+ /* send any buffered data */
+ ti_send(tport);
+}
+
+
+static void ti_recv(struct device *dev, struct tty_struct *tty,
+ unsigned char *data, int length)
+{
+ int cnt;
+
+ do {
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ tty_flip_buffer_push(tty);
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length);
+ return;
+ }
+ }
+ cnt = min(length, TTY_FLIPBUF_SIZE - tty->flip.count);
+ memcpy(tty->flip.char_buf_ptr, data, cnt);
+ memset(tty->flip.flag_buf_ptr, 0, cnt);
+ tty->flip.char_buf_ptr += cnt;
+ tty->flip.flag_buf_ptr += cnt;
+ tty->flip.count += cnt;
+ data += cnt;
+ length -= cnt;
+ } while (length > 0);
+
+ tty_flip_buffer_push(tty);
+}
+
+
+static void ti_send(struct ti_port *tport)
+{
+ int count, result;
+ struct usb_serial_port *port = tport->tp_port;
+ struct tty_struct *tty = port->tty;
+ unsigned long flags;
+
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+
+ if (tport->tp_write_urb_in_use) {
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+ return;
+ }
+
+ count = ti_buf_get(tport->tp_write_buf,
+ port->write_urb->transfer_buffer,
+ port->bulk_out_size);
+
+ if (count == 0) {
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+ return;
+ }
+
+ tport->tp_write_urb_in_use = 1;
+
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+
+ usb_serial_debug_data(debug, &port->dev, __FUNCTION__, 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(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result);
+ tport->tp_write_urb_in_use = 0;
+ /* TODO: reschedule ti_send */
+ } else {
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ tport->tp_icount.tx += count;
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+ }
+
+ /* more room in the buffer for new writes, wakeup */
+ if (tty)
+ tty_wakeup(tty);
+ wake_up_interruptible(&tport->tp_write_wait);
+}
+
+
+static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
+{
+ int status;
+
+ status = ti_write_byte(tport->tp_tdev,
+ tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
+ TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
+
+ if (!status)
+ tport->tp_shadow_mcr = mcr;
+
+ return status;
+}
+
+
+static int ti_get_lsr(struct ti_port *tport)
+{
+ int size,status;
+ struct ti_device *tdev = tport->tp_tdev;
+ struct usb_serial_port *port = tport->tp_port;
+ int port_number = port->number - port->serial->minor;
+ struct ti_port_status *data;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ size = sizeof(struct ti_port_status);
+ data = kmalloc(size, GFP_KERNEL);
+ if (!data) {
+ dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
+ 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", __FUNCTION__, status);
+ goto free_data;
+ }
+
+ dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR);
+
+ tport->tp_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;
+
+ if (!ret_arg)
+ return -EFAULT;
+
+ memset(&ret_serial, 0, sizeof(ret_serial));
+
+ ret_serial.type = PORT_16550A;
+ ret_serial.line = port->serial->minor;
+ ret_serial.port = port->number - port->serial->minor;
+ ret_serial.flags = tport->tp_flags;
+ ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
+ ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
+ ret_serial.closing_wait = tport->tp_closing_wait;
+
+ if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
+ return -EFAULT;
+
+ return 0;
+}
+
+
+static int ti_set_serial_info(struct ti_port *tport,
+ struct serial_struct __user *new_arg)
+{
+ struct usb_serial_port *port = tport->tp_port;
+ struct serial_struct new_serial;
+
+ if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
+ return -EFAULT;
+
+ tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
+ if (port->tty)
+ port->tty->low_latency =
+ (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+ tport->tp_closing_wait = new_serial.closing_wait;
+
+ 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;
+
+ dbg("%s - msr 0x%02X", __FUNCTION__, msr);
+
+ if (msr & TI_MSR_DELTA_MASK) {
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ icount = &tport->tp_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_msr_wait);
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+ }
+
+ tport->tp_msr = msr & TI_MSR_MASK;
+
+ /* handle CTS flow control */
+ tty = tport->tp_port->tty;
+ if (tty && C_CRTSCTS(tty)) {
+ if (msr & TI_MSR_CTS) {
+ tty->hw_stopped = 0;
+ tty_wakeup(tty);
+ } else {
+ tty->hw_stopped = 1;
+ }
+ }
+}
+
+
+static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
+{
+ struct ti_device *tdev = tport->tp_tdev;
+ struct usb_serial_port *port = tport->tp_port;
+ wait_queue_t wait;
+ unsigned long flags;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ spin_lock_irqsave(&tport->tp_lock, flags);
+
+ /* wait for data to drain from the buffer */
+ tdev->td_urb_error = 0;
+ init_waitqueue_entry(&wait, current);
+ add_wait_queue(&tport->tp_write_wait, &wait);
+ for (;;) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (ti_buf_data_avail(tport->tp_write_buf) == 0
+ || timeout == 0 || signal_pending(current)
+ || tdev->td_urb_error
+ || !usb_get_intfdata(port->serial->interface)) /* disconnect */
+ break;
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+ timeout = schedule_timeout(timeout);
+ spin_lock_irqsave(&tport->tp_lock, flags);
+ }
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&tport->tp_write_wait, &wait);
+
+ /* flush any remaining data in the buffer */
+ if (flush)
+ ti_buf_clear(tport->tp_write_buf);
+
+ spin_unlock_irqrestore(&tport->tp_lock, flags);
+
+ /* wait for data to drain from the device */
+ /* wait for empty tx register, plus 20 ms */
+ timeout += jiffies;
+ tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
+ while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
+ && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
+ && usb_get_intfdata(port->serial->interface)) { /* not disconnected */
+ if (ti_get_lsr(tport))
+ break;
+ msleep_interruptible(20);
+ }
+}
+
+
+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) {
+ urb = tport->tp_port->read_urb;
+ urb->complete = ti_bulk_in_callback;
+ urb->context = tport;
+ urb->dev = tport->tp_port->serial->dev;
+ status = usb_submit_urb(urb, GFP_KERNEL);
+ }
+ 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, HZ);
+
+ 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, HZ);
+
+ if (status == size)
+ status = 0;
+
+ if (status > 0)
+ status = -ECOMM;
+
+ return status;
+}
+
+
+static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
+ __u8 mask, __u8 byte)
+{
+ int status;
+ unsigned int size;
+ struct ti_write_data_bytes *data;
+ struct device *dev = &tdev->td_serial->dev->dev;
+
+ dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte);
+
+ size = sizeof(struct ti_write_data_bytes) + 2;
+ data = kmalloc(size, GFP_KERNEL);
+ if (!data) {
+ dev_err(dev, "%s - out of memory\n", __FUNCTION__);
+ 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(dev, "%s - failed, %d\n", __FUNCTION__, status);
+
+ kfree(data);
+
+ return status;
+}
+
+
+static int ti_download_firmware(struct ti_device *tdev,
+ unsigned char *firmware, unsigned int firmware_size)
+{
+ int status = 0;
+ int buffer_size;
+ int pos;
+ int len;
+ int done;
+ __u8 cs = 0;
+ __u8 *buffer;
+ struct usb_device *dev = tdev->td_serial->dev;
+ struct ti_firmware_header *header;
+ unsigned int pipe = usb_sndbulkpipe(dev,
+ tdev->td_serial->port[0]->bulk_out_endpointAddress);
+
+
+ buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
+ buffer = kmalloc(buffer_size, GFP_KERNEL);
+ if (!buffer) {
+ dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
+ return -ENOMEM;
+ }
+
+ memcpy(buffer, firmware, firmware_size);
+ memset(buffer+firmware_size, 0xff, buffer_size-firmware_size);
+
+ for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++)
+ cs = (__u8)(cs + buffer[pos]);
+
+ header = (struct ti_firmware_header *)buffer;
+ header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header)));
+ header->bCheckSum = cs;
+
+ dbg("%s - downloading firmware", __FUNCTION__);
+ for (pos = 0; pos < buffer_size; pos += done) {
+ len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
+ status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, HZ);
+ if (status)
+ break;
+ }
+
+ kfree(buffer);
+
+ if (status) {
+ dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status);
+ return status;
+ }
+
+ dbg("%s - download successful", __FUNCTION__);
+
+ return 0;
+}
+
+
+/* Circular Buffer Functions */
+
+/*
+ * ti_buf_alloc
+ *
+ * Allocate a circular buffer and all associated memory.
+ */
+
+static struct circ_buf *ti_buf_alloc(void)
+{
+ struct circ_buf *cb;
+
+ cb = (struct circ_buf *)kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
+ if (cb == NULL)
+ return NULL;
+
+ cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
+ if (cb->buf == NULL) {
+ kfree(cb);
+ return NULL;
+ }
+
+ ti_buf_clear(cb);
+
+ return cb;
+}
+
+
+/*
+ * ti_buf_free
+ *
+ * Free the buffer and all associated memory.
+ */
+
+static void ti_buf_free(struct circ_buf *cb)
+{
+ kfree(cb->buf);
+ kfree(cb);
+}
+
+
+/*
+ * ti_buf_clear
+ *
+ * Clear out all data in the circular buffer.
+ */
+
+static void ti_buf_clear(struct circ_buf *cb)
+{
+ cb->head = cb->tail = 0;
+}
+
+
+/*
+ * ti_buf_data_avail
+ *
+ * Return the number of bytes of data available in the circular
+ * buffer.
+ */
+
+static int ti_buf_data_avail(struct circ_buf *cb)
+{
+ return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
+}
+
+
+/*
+ * ti_buf_space_avail
+ *
+ * Return the number of bytes of space available in the circular
+ * buffer.
+ */
+
+static int ti_buf_space_avail(struct circ_buf *cb)
+{
+ return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
+}
+
+
+/*
+ * ti_buf_put
+ *
+ * Copy data data from a user buffer and put it into the circular buffer.
+ * Restrict to the amount of space available.
+ *
+ * Return the number of bytes copied.
+ */
+
+static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
+{
+ int c, ret = 0;
+
+ while (1) {
+ c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
+ if (count < c)
+ c = count;
+ if (c <= 0)
+ break;
+ memcpy(cb->buf + cb->head, buf, c);
+ cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
+ buf += c;
+ count -= c;
+ ret += c;
+ }
+
+ return ret;
+}
+
+
+/*
+ * ti_buf_get
+ *
+ * Get data from the circular buffer and copy to the given buffer.
+ * Restrict to the amount of data available.
+ *
+ * Return the number of bytes copied.
+ */
+
+static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
+{
+ int c, ret = 0;
+
+ while (1) {
+ c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
+ if (count < c)
+ c = count;
+ if (c <= 0)
+ break;
+ memcpy(buf, cb->buf + cb->tail, c);
+ cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
+ buf += c;
+ count -= c;
+ ret += c;
+ }
+
+ return ret;
+}
git://git.onelab.eu / linux-2.6.git / blobdiff