+++ /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/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 <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_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 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_shutdown(struct usb_serial *serial);
-static int ti_open(struct tty_struct *tty, struct usb_serial_port *port,
- struct file *file);
-static void ti_close(struct tty_struct *tty, struct usb_serial_port *port,
- struct file *file);
-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 void ti_throttle(struct tty_struct *tty);
-static void ti_unthrottle(struct tty_struct *tty);
-static int ti_ioctl(struct tty_struct *tty, struct file *file,
- 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, struct file *file);
-static int ti_tiocmset(struct tty_struct *tty, struct file *file,
- 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 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 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_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, int type);
-
-/* 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 unsigned int vendor_3410_count;
-static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
-static unsigned int product_3410_count;
-static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
-static unsigned int vendor_5052_count;
-static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
-static unsigned 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[10+TI_EXTRA_VID_PID_COUNT+1] = {
- { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
- { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_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) },
-};
-
-static struct usb_device_id ti_id_table_5052[5+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) },
- { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
-};
-
-static struct usb_device_id ti_id_table_combined[14+2*TI_EXTRA_VID_PID_COUNT+1] = {
- { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
- { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_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) },
- { }
-};
-
-static struct usb_driver ti_usb_driver = {
- .name = "ti_usb_3410_5052",
- .probe = usb_serial_probe,
- .disconnect = usb_serial_disconnect,
- .id_table = ti_id_table_combined,
- .no_dynamic_id = 1,
-};
-
-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",
- .usb_driver = &ti_usb_driver,
- .id_table = ti_id_table_3410,
- .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_driver ti_2port_device = {
- .driver = {
- .owner = THIS_MODULE,
- .name = "ti_usb_3410_5052_2",
- },
- .description = "TI USB 5052 2 port adapter",
- .usb_driver = &ti_usb_driver,
- .id_table = ti_id_table_5052,
- .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_FIRMWARE("ti_3410.fw");
-MODULE_FIRMWARE("ti_5052.fw");
-
-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 = ARRAY_SIZE(ti_id_table_3410) - 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 = ARRAY_SIZE(ti_id_table_5052) - 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;
-
- printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
- TI_DRIVER_DESC "\n");
-
- 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",
- __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 == NULL) {
- dev_err(&dev->dev, "%s - out of memory\n", __func__);
- return -ENOMEM;
- }
- mutex_init(&tdev->td_open_close_lock);
- 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", __func__,
- 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, 3410);
- else
- status = ti_download_firmware(tdev, 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 */
- if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
- status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
- status = status ? status : -ENODEV;
- goto free_tdev;
- }
-
- /* set up port structures */
- for (i = 0; i < serial->num_ports; ++i) {
- tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
- if (tport == NULL) {
- dev_err(&dev->dev, "%s - out of memory\n", __func__);
- status = -ENOMEM;
- goto free_tports;
- }
- 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", __func__);
- 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", __func__);
-
- 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);
- }
- }
-
- kfree(tdev);
- usb_set_serial_data(serial, NULL);
-}
-
-
-static int ti_open(struct tty_struct *tty,
- 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", __func__, 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 (mutex_lock_interruptible(&tdev->td_open_close_lock))
- return -ERESTARTSYS;
-
- if (tty)
- 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", __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->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",
- __func__, status);
- goto release_lock;
- }
- }
-
- if (tty)
- ti_set_termios(tty, port, tty->termios);
-
- dbg("%s - sending TI_OPEN_PORT", __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;
- }
-
- dbg("%s - sending TI_START_PORT", __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;
- }
-
- dbg("%s - sending TI_PURGE_PORT", __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);
-
- dbg("%s - sending TI_OPEN_PORT (2)", __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;
- }
-
- dbg("%s - sending TI_START_PORT (2)", __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 */
- dbg("%s - start read urb", __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->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",
- __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);
- dbg("%s - exit %d", __func__, status);
- return status;
-}
-
-
-static void ti_close(struct tty_struct *tty, struct usb_serial_port *port,
- struct file *file)
-{
- struct ti_device *tdev;
- struct ti_port *tport;
- int port_number;
- int status;
- int do_unlock;
-
- dbg("%s - port %d", __func__, 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", __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);
-
- dbg("%s - exit", __func__);
-}
-
-
-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);
- unsigned long flags;
-
- dbg("%s - port %d", __func__, port->number);
-
- if (count == 0) {
- dbg("%s - write request of 0 bytes", __func__);
- 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 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;
-
- dbg("%s - port %d", __func__, 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", __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;
-
- dbg("%s - port %d", __func__, 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", __func__, chars);
- return chars;
-}
-
-
-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);
-
- dbg("%s - port %d", __func__, port->number);
-
- 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;
-
- dbg("%s - port %d", __func__, port->number);
-
- 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, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- struct usb_serial_port *port = tty->driver_data;
- 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", __func__, port->number, cmd);
-
- if (tport == NULL)
- return -ENODEV;
-
- switch (cmd) {
- case TIOCGSERIAL:
- dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
- return ti_get_serial_info(tport,
- (struct serial_struct __user *)arg);
- case TIOCSSERIAL:
- dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
- return ti_set_serial_info(tty, tport,
- (struct serial_struct __user *)arg);
- case TIOCMIWAIT:
- dbg("%s - (%d) TIOCMIWAIT", __func__, 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",
- __func__, 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 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->number - port->serial->minor;
- unsigned int mcr;
-
- dbg("%s - port %d", __func__, port->number);
-
- cflag = tty->termios->c_cflag;
- iflag = tty->termios->c_iflag;
-
- dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
- dbg("%s - old clfag %08x, old iflag %08x", __func__,
- 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", __func__);
- 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 {
- 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);
-
- /* FIXME: Should calculate resulting baud here and report it back */
- if ((cflag & CBAUD) != B0)
- tty_encode_baud_rate(tty, baud, baud);
-
- dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
- __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 file *file)
-{
- 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;
-
- dbg("%s - port %d", __func__, port->number);
-
- 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);
-
- dbg("%s - 0x%04X", __func__, result);
-
- return result;
-}
-
-
-static int ti_tiocmset(struct tty_struct *tty, struct file *file,
- 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;
-
- dbg("%s - port %d", __func__, port->number);
-
- 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;
-
- dbg("%s - state = %d", __func__, 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", __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;
-
- dbg("%s", __func__);
-
- switch (status) {
- case 0:
- break;
- case -ECONNRESET:
- case -ENOENT:
- case -ESHUTDOWN:
- dbg("%s - urb shutting down, %d", __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) {
- dbg("%s - bad packet size, %d", __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]);
-
- dbg("%s - port_number %d, function %d, data 0x%02X",
- __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];
- dbg("%s - port %d, msr 0x%02X", __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;
- struct tty_struct *tty;
-
- dbg("%s", __func__);
-
- switch (status) {
- case 0:
- break;
- case -ECONNRESET:
- case -ENOENT:
- case -ESHUTDOWN:
- dbg("%s - urb shutting down, %d", __func__, 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",
- __func__, status);
- tport->tp_tdev->td_urb_error = 1;
- wake_up_interruptible(&tport->tp_write_wait);
- }
-
- if (status == -EPIPE)
- goto exit;
-
- if (status) {
- dev_err(dev, "%s - stopping read!\n", __func__);
- return;
- }
-
- tty = tty_port_tty_get(&port->port);
- if (tty && urb->actual_length) {
- usb_serial_debug_data(debug, dev, __func__,
- urb->actual_length, urb->transfer_buffer);
-
- if (!tport->tp_is_open)
- dbg("%s - port closed, dropping data", __func__);
- else
- ti_recv(&urb->dev->dev, tty,
- urb->transfer_buffer,
- urb->actual_length);
-
- spin_lock(&tport->tp_lock);
- tport->tp_icount.rx += urb->actual_length;
- spin_unlock(&tport->tp_lock);
- tty_kref_put(tty);
- }
-
-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;
- 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;
- struct device *dev = &urb->dev->dev;
- int status = urb->status;
-
- dbg("%s - port %d", __func__, port->number);
-
- tport->tp_write_urb_in_use = 0;
-
- switch (status) {
- case 0:
- break;
- case -ECONNRESET:
- case -ENOENT:
- case -ESHUTDOWN:
- dbg("%s - urb shutting down, %d", __func__, 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",
- __func__, 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 {
- cnt = tty_buffer_request_room(tty, length);
- if (cnt < length) {
- dev_err(dev, "%s - dropping data, %d bytes lost\n",
- __func__, length - cnt);
- if (cnt == 0)
- break;
- }
- tty_insert_flip_string(tty, data, cnt);
- tty_flip_buffer_push(tty);
- 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;
- struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
- unsigned long flags;
-
-
- dbg("%s - port %d", __func__, port->number);
-
- spin_lock_irqsave(&tport->tp_lock, flags);
-
- if (tport->tp_write_urb_in_use)
- goto unlock;
-
- count = ti_buf_get(tport->tp_write_buf,
- 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(debug, &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(&port->dev, "%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);
- 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);
- tty_kref_put(tty);
- wake_up_interruptible(&tport->tp_write_wait);
- return;
-unlock:
- spin_unlock_irqrestore(&tport->tp_lock, flags);
- tty_kref_put(tty);
- return;
-}
-
-
-static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
-{
- unsigned long flags;
- 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);
-
- 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)
-{
- 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", __func__, port->number);
-
- size = sizeof(struct ti_port_status);
- data = kmalloc(size, GFP_KERNEL);
- if (!data) {
- dev_err(&port->dev, "%s - out of memory\n", __func__);
- 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;
- }
-
- dbg("%s - lsr 0x%02X", __func__, 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 tty_struct *tty, struct ti_port *tport,
- struct serial_struct __user *new_arg)
-{
- 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;
- 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", __func__, 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 = tty_port_tty_get(&tport->tp_port->port);
- if (tty && C_CRTSCTS(tty)) {
- if (msr & TI_MSR_CTS) {
- tty->hw_stopped = 0;
- tty_wakeup(tty);
- } else {
- tty->hw_stopped = 1;
- }
- }
- tty_kref_put(tty);
-}
-
-
-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;
-
- dbg("%s - port %d", __func__, port->number);
-
- spin_lock_irq(&tport->tp_lock);
-
- /* 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
- || port->serial->disconnected) /* disconnect */
- break;
- spin_unlock_irq(&tport->tp_lock);
- timeout = schedule_timeout(timeout);
- spin_lock_irq(&tport->tp_lock);
- }
- 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_irq(&tport->tp_lock);
-
- mutex_lock(&port->serial->disc_mutex);
- /* 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
- && !port->serial->disconnected) {
- if (ti_get_lsr(tport))
- break;
- mutex_unlock(&port->serial->disc_mutex);
- msleep_interruptible(20);
- mutex_lock(&port->serial->disc_mutex);
- }
- mutex_unlock(&port->serial->disc_mutex);
-}
-
-
-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->complete = ti_bulk_in_callback;
- urb->context = tport;
- urb->dev = tport->tp_port->serial->dev;
- 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 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",
- __func__, 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", __func__);
- 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", __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;
- 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;
-
- dbg("%s - downloading firmware", __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 type)
-{
- int status = -ENOMEM;
- 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];
- sprintf(buf, "ti_usb-%d.bin", type);
-
- if (request_firmware(&fw_p, buf, &dev->dev)) {
- 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\n", __func__);
- 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);
- }
- release_firmware(fw_p);
- if (status) {
- dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
- __func__, status);
- return status;
- }
-
- dbg("%s - download successful", __func__);
-
- 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 = 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;
-}
projects / kernel-power / blobdiff