diff options
Diffstat (limited to 'drivers/usb/serial/ti_usb_3410_5052.c')
| -rw-r--r-- | drivers/usb/serial/ti_usb_3410_5052.c | 1842 |
1 files changed, 1842 insertions, 0 deletions
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c new file mode 100644 index 000000000000..98054876cca2 --- /dev/null +++ b/drivers/usb/serial/ti_usb_3410_5052.c @@ -0,0 +1,1842 @@ +/* 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, 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", __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, 1000); + 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; +} |