1/* vi: ts=8 sw=8
   2 *
   3 * TI 3410/5052 USB Serial Driver
   4 *
   5 * Copyright (C) 2004 Texas Instruments
   6 *
   7 * This driver is based on the Linux io_ti driver, which is
   8 *   Copyright (C) 2000-2002 Inside Out Networks
   9 *   Copyright (C) 2001-2002 Greg Kroah-Hartman
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License as published by
  13 * the Free Software Foundation; either version 2 of the License, or
  14 * (at your option) any later version.
  15 *
  16 * For questions or problems with this driver, contact Texas Instruments
  17 * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
  18 * Peter Berger <pberger@brimson.com>.
  19 */
  20
  21#include <linux/kernel.h>
  22#include <linux/errno.h>
  23#include <linux/firmware.h>
  24#include <linux/init.h>
  25#include <linux/slab.h>
  26#include <linux/tty.h>
  27#include <linux/tty_driver.h>
  28#include <linux/tty_flip.h>
  29#include <linux/module.h>
  30#include <linux/spinlock.h>
  31#include <linux/ioctl.h>
  32#include <linux/serial.h>
  33#include <linux/kfifo.h>
  34#include <linux/mutex.h>
  35#include <linux/uaccess.h>
  36#include <linux/usb.h>
  37#include <linux/usb/serial.h>
  38
  39#include "ti_usb_3410_5052.h"
  40
  41/* Defines */
  42
  43#define TI_DRIVER_VERSION	"v0.10"
  44#define TI_DRIVER_AUTHOR	"Al Borchers <alborchers@steinerpoint.com>"
  45#define TI_DRIVER_DESC		"TI USB 3410/5052 Serial Driver"
  46
  47#define TI_FIRMWARE_BUF_SIZE	16284
  48
  49#define TI_WRITE_BUF_SIZE	1024
  50
  51#define TI_TRANSFER_TIMEOUT	2
  52
  53#define TI_DEFAULT_CLOSING_WAIT	4000		/* in .01 secs */
  54
  55/* supported setserial flags */
  56#define TI_SET_SERIAL_FLAGS	0
  57
  58/* read urb states */
  59#define TI_READ_URB_RUNNING	0
  60#define TI_READ_URB_STOPPING	1
  61#define TI_READ_URB_STOPPED	2
  62
  63#define TI_EXTRA_VID_PID_COUNT	5
  64
  65
  66/* Structures */
  67
  68struct ti_port {
  69	int			tp_is_open;
  70	__u8			tp_msr;
  71	__u8			tp_lsr;
  72	__u8			tp_shadow_mcr;
  73	__u8			tp_uart_mode;	/* 232 or 485 modes */
  74	unsigned int		tp_uart_base_addr;
  75	int			tp_flags;
  76	int			tp_closing_wait;/* in .01 secs */
  77	struct async_icount	tp_icount;
  78	wait_queue_head_t	tp_msr_wait;	/* wait for msr change */
  79	wait_queue_head_t	tp_write_wait;
  80	struct ti_device	*tp_tdev;
  81	struct usb_serial_port	*tp_port;
  82	spinlock_t		tp_lock;
  83	int			tp_read_urb_state;
  84	int			tp_write_urb_in_use;
  85	struct kfifo		write_fifo;
  86};
  87
  88struct ti_device {
  89	struct mutex		td_open_close_lock;
  90	int			td_open_port_count;
  91	struct usb_serial	*td_serial;
  92	int			td_is_3410;
  93	int			td_urb_error;
  94};
  95
  96
  97/* Function Declarations */
  98
  99static int ti_startup(struct usb_serial *serial);
 100static void ti_release(struct usb_serial *serial);
 101static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 102static void ti_close(struct usb_serial_port *port);
 103static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 104		const unsigned char *data, int count);
 105static int ti_write_room(struct tty_struct *tty);
 106static int ti_chars_in_buffer(struct tty_struct *tty);
 107static void ti_throttle(struct tty_struct *tty);
 108static void ti_unthrottle(struct tty_struct *tty);
 109static int ti_ioctl(struct tty_struct *tty,
 110		unsigned int cmd, unsigned long arg);
 111static int ti_get_icount(struct tty_struct *tty,
 112		struct serial_icounter_struct *icount);
 113static void ti_set_termios(struct tty_struct *tty,
 114		struct usb_serial_port *port, struct ktermios *old_termios);
 115static int ti_tiocmget(struct tty_struct *tty);
 116static int ti_tiocmset(struct tty_struct *tty,
 117		unsigned int set, unsigned int clear);
 118static void ti_break(struct tty_struct *tty, int break_state);
 119static void ti_interrupt_callback(struct urb *urb);
 120static void ti_bulk_in_callback(struct urb *urb);
 121static void ti_bulk_out_callback(struct urb *urb);
 122
 123static void ti_recv(struct device *dev, struct tty_struct *tty,
 124	unsigned char *data, int length);
 125static void ti_send(struct ti_port *tport);
 126static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 127static int ti_get_lsr(struct ti_port *tport);
 128static int ti_get_serial_info(struct ti_port *tport,
 129	struct serial_struct __user *ret_arg);
 130static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 131	struct serial_struct __user *new_arg);
 132static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 133
 134static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
 135
 136static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 137static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 138
 139static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 140	__u16 moduleid, __u16 value, __u8 *data, int size);
 141static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 142	__u16 moduleid, __u16 value, __u8 *data, int size);
 143
 144static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
 145	__u8 mask, __u8 byte);
 146
 147static int ti_download_firmware(struct ti_device *tdev);
 148
 149
 150/* Data */
 151
 152/* module parameters */
 153static int debug;
 154static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 155static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 156static unsigned int vendor_3410_count;
 157static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 158static unsigned int product_3410_count;
 159static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 160static unsigned int vendor_5052_count;
 161static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 162static unsigned int product_5052_count;
 163
 164/* supported devices */
 165/* the array dimension is the number of default entries plus */
 166/* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 167/* null entry */
 168static struct usb_device_id ti_id_table_3410[13+TI_EXTRA_VID_PID_COUNT+1] = {
 169	{ USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 170	{ USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 171	{ USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 172	{ USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 173	{ USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 174	{ USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 175	{ USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 176	{ USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 177	{ USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 178	{ USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 179	{ USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 180	{ USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 181	{ USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 
 
 182};
 183
 184static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 185	{ USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 186	{ USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 187	{ USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 188	{ USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 189};
 190
 191static struct usb_device_id ti_id_table_combined[17+2*TI_EXTRA_VID_PID_COUNT+1] = {
 192	{ USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 193	{ USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 194	{ USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 195	{ USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 196	{ USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 197	{ USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 198	{ USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 199	{ USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 200	{ USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 201	{ USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 202	{ USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 203	{ USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 204	{ USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 205	{ USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 206	{ USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 207	{ USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 208	{ USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 
 
 209	{ }
 210};
 211
 212static struct usb_driver ti_usb_driver = {
 213	.name			= "ti_usb_3410_5052",
 214	.probe			= usb_serial_probe,
 215	.disconnect		= usb_serial_disconnect,
 216	.id_table		= ti_id_table_combined,
 217	.no_dynamic_id = 	1,
 218};
 219
 220static struct usb_serial_driver ti_1port_device = {
 221	.driver = {
 222		.owner		= THIS_MODULE,
 223		.name		= "ti_usb_3410_5052_1",
 224	},
 225	.description		= "TI USB 3410 1 port adapter",
 226	.usb_driver		= &ti_usb_driver,
 227	.id_table		= ti_id_table_3410,
 228	.num_ports		= 1,
 229	.attach			= ti_startup,
 230	.release		= ti_release,
 231	.open			= ti_open,
 232	.close			= ti_close,
 233	.write			= ti_write,
 234	.write_room		= ti_write_room,
 235	.chars_in_buffer	= ti_chars_in_buffer,
 236	.throttle		= ti_throttle,
 237	.unthrottle		= ti_unthrottle,
 238	.ioctl			= ti_ioctl,
 239	.set_termios		= ti_set_termios,
 240	.tiocmget		= ti_tiocmget,
 241	.tiocmset		= ti_tiocmset,
 242	.get_icount		= ti_get_icount,
 243	.break_ctl		= ti_break,
 244	.read_int_callback	= ti_interrupt_callback,
 245	.read_bulk_callback	= ti_bulk_in_callback,
 246	.write_bulk_callback	= ti_bulk_out_callback,
 247};
 248
 249static struct usb_serial_driver ti_2port_device = {
 250	.driver = {
 251		.owner		= THIS_MODULE,
 252		.name		= "ti_usb_3410_5052_2",
 253	},
 254	.description		= "TI USB 5052 2 port adapter",
 255	.usb_driver		= &ti_usb_driver,
 256	.id_table		= ti_id_table_5052,
 257	.num_ports		= 2,
 258	.attach			= ti_startup,
 259	.release		= ti_release,
 260	.open			= ti_open,
 261	.close			= ti_close,
 262	.write			= ti_write,
 263	.write_room		= ti_write_room,
 264	.chars_in_buffer	= ti_chars_in_buffer,
 265	.throttle		= ti_throttle,
 266	.unthrottle		= ti_unthrottle,
 267	.ioctl			= ti_ioctl,
 268	.set_termios		= ti_set_termios,
 269	.tiocmget		= ti_tiocmget,
 270	.tiocmset		= ti_tiocmset,
 271	.get_icount		= ti_get_icount,
 272	.break_ctl		= ti_break,
 273	.read_int_callback	= ti_interrupt_callback,
 274	.read_bulk_callback	= ti_bulk_in_callback,
 275	.write_bulk_callback	= ti_bulk_out_callback,
 276};
 277
 
 
 
 278
 279/* Module */
 280
 281MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 282MODULE_DESCRIPTION(TI_DRIVER_DESC);
 283MODULE_VERSION(TI_DRIVER_VERSION);
 284MODULE_LICENSE("GPL");
 285
 286MODULE_FIRMWARE("ti_3410.fw");
 287MODULE_FIRMWARE("ti_5052.fw");
 288MODULE_FIRMWARE("mts_cdma.fw");
 289MODULE_FIRMWARE("mts_gsm.fw");
 290MODULE_FIRMWARE("mts_edge.fw");
 291MODULE_FIRMWARE("mts_mt9234mu.fw");
 292MODULE_FIRMWARE("mts_mt9234zba.fw");
 293
 294module_param(debug, bool, S_IRUGO | S_IWUSR);
 295MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 296
 297module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 298MODULE_PARM_DESC(closing_wait,
 299    "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 300
 301module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 302MODULE_PARM_DESC(vendor_3410,
 303		"Vendor ids for 3410 based devices, 1-5 short integers");
 304module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 305MODULE_PARM_DESC(product_3410,
 306		"Product ids for 3410 based devices, 1-5 short integers");
 307module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 308MODULE_PARM_DESC(vendor_5052,
 309		"Vendor ids for 5052 based devices, 1-5 short integers");
 310module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 311MODULE_PARM_DESC(product_5052,
 312		"Product ids for 5052 based devices, 1-5 short integers");
 313
 314MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 315
 316
 317/* Functions */
 318
 319static int __init ti_init(void)
 320{
 321	int i, j, c;
 322	int ret;
 323
 324	/* insert extra vendor and product ids */
 325	c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 326	j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 327	for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 328		ti_id_table_3410[j].idVendor = vendor_3410[i];
 329		ti_id_table_3410[j].idProduct = product_3410[i];
 330		ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 331		ti_id_table_combined[c].idVendor = vendor_3410[i];
 332		ti_id_table_combined[c].idProduct = product_3410[i];
 333		ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 334	}
 335	j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 336	for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 337		ti_id_table_5052[j].idVendor = vendor_5052[i];
 338		ti_id_table_5052[j].idProduct = product_5052[i];
 339		ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 340		ti_id_table_combined[c].idVendor = vendor_5052[i];
 341		ti_id_table_combined[c].idProduct = product_5052[i];
 342		ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 343	}
 344
 345	ret = usb_serial_register(&ti_1port_device);
 346	if (ret)
 347		goto failed_1port;
 348	ret = usb_serial_register(&ti_2port_device);
 349	if (ret)
 350		goto failed_2port;
 351
 352	ret = usb_register(&ti_usb_driver);
 353	if (ret)
 354		goto failed_usb;
 355
 356	printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
 357	       TI_DRIVER_DESC "\n");
 358
 359	return 0;
 360
 361failed_usb:
 362	usb_serial_deregister(&ti_2port_device);
 363failed_2port:
 364	usb_serial_deregister(&ti_1port_device);
 365failed_1port:
 366	return ret;
 367}
 368
 369
 370static void __exit ti_exit(void)
 371{
 372	usb_deregister(&ti_usb_driver);
 373	usb_serial_deregister(&ti_1port_device);
 374	usb_serial_deregister(&ti_2port_device);
 375}
 376
 377
 378module_init(ti_init);
 379module_exit(ti_exit);
 380
 381
 382static int ti_startup(struct usb_serial *serial)
 383{
 384	struct ti_device *tdev;
 385	struct ti_port *tport;
 386	struct usb_device *dev = serial->dev;
 387	int status;
 388	int i;
 389
 390
 391	dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 392	    __func__, le16_to_cpu(dev->descriptor.idProduct),
 393	    dev->descriptor.bNumConfigurations,
 394	    dev->actconfig->desc.bConfigurationValue);
 395
 396	/* create device structure */
 397	tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 398	if (tdev == NULL) {
 399		dev_err(&dev->dev, "%s - out of memory\n", __func__);
 400		return -ENOMEM;
 401	}
 402	mutex_init(&tdev->td_open_close_lock);
 403	tdev->td_serial = serial;
 404	usb_set_serial_data(serial, tdev);
 405
 406	/* determine device type */
 407	if (usb_match_id(serial->interface, ti_id_table_3410))
 408		tdev->td_is_3410 = 1;
 409	dbg("%s - device type is %s", __func__,
 410				tdev->td_is_3410 ? "3410" : "5052");
 411
 412	/* if we have only 1 configuration, download firmware */
 413	if (dev->descriptor.bNumConfigurations == 1) {
 414		if ((status = ti_download_firmware(tdev)) != 0)
 
 
 415			goto free_tdev;
 416
 417		/* 3410 must be reset, 5052 resets itself */
 418		if (tdev->td_is_3410) {
 419			msleep_interruptible(100);
 420			usb_reset_device(dev);
 421		}
 422
 423		status = -ENODEV;
 424		goto free_tdev;
 425	}
 426
 427	/* the second configuration must be set */
 428	if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 429		status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 430		status = status ? status : -ENODEV;
 431		goto free_tdev;
 432	}
 433
 434	/* set up port structures */
 435	for (i = 0; i < serial->num_ports; ++i) {
 436		tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 437		if (tport == NULL) {
 438			dev_err(&dev->dev, "%s - out of memory\n", __func__);
 439			status = -ENOMEM;
 440			goto free_tports;
 441		}
 442		spin_lock_init(&tport->tp_lock);
 443		tport->tp_uart_base_addr = (i == 0 ?
 444				TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 445		tport->tp_closing_wait = closing_wait;
 446		init_waitqueue_head(&tport->tp_msr_wait);
 447		init_waitqueue_head(&tport->tp_write_wait);
 448		if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 449								GFP_KERNEL)) {
 450			dev_err(&dev->dev, "%s - out of memory\n", __func__);
 451			kfree(tport);
 452			status = -ENOMEM;
 453			goto free_tports;
 454		}
 455		tport->tp_port = serial->port[i];
 456		tport->tp_tdev = tdev;
 457		usb_set_serial_port_data(serial->port[i], tport);
 458		tport->tp_uart_mode = 0;	/* default is RS232 */
 459	}
 460
 461	return 0;
 462
 463free_tports:
 464	for (--i; i >= 0; --i) {
 465		tport = usb_get_serial_port_data(serial->port[i]);
 466		kfifo_free(&tport->write_fifo);
 467		kfree(tport);
 468		usb_set_serial_port_data(serial->port[i], NULL);
 469	}
 470free_tdev:
 471	kfree(tdev);
 472	usb_set_serial_data(serial, NULL);
 473	return status;
 474}
 475
 476
 477static void ti_release(struct usb_serial *serial)
 478{
 479	int i;
 480	struct ti_device *tdev = usb_get_serial_data(serial);
 481	struct ti_port *tport;
 482
 483	dbg("%s", __func__);
 484
 485	for (i = 0; i < serial->num_ports; ++i) {
 486		tport = usb_get_serial_port_data(serial->port[i]);
 487		if (tport) {
 488			kfifo_free(&tport->write_fifo);
 489			kfree(tport);
 490		}
 491	}
 492
 493	kfree(tdev);
 494}
 495
 496
 497static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 498{
 499	struct ti_port *tport = usb_get_serial_port_data(port);
 500	struct ti_device *tdev;
 501	struct usb_device *dev;
 502	struct urb *urb;
 503	int port_number;
 504	int status;
 505	__u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 506			     TI_PIPE_TIMEOUT_ENABLE |
 507			     (TI_TRANSFER_TIMEOUT << 2));
 508
 509	dbg("%s - port %d", __func__, port->number);
 510
 511	if (tport == NULL)
 512		return -ENODEV;
 513
 514	dev = port->serial->dev;
 515	tdev = tport->tp_tdev;
 516
 517	/* only one open on any port on a device at a time */
 518	if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 519		return -ERESTARTSYS;
 520
 521	port_number = port->number - port->serial->minor;
 522
 523	memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 524
 525	tport->tp_msr = 0;
 526	tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 527
 528	/* start interrupt urb the first time a port is opened on this device */
 529	if (tdev->td_open_port_count == 0) {
 530		dbg("%s - start interrupt in urb", __func__);
 531		urb = tdev->td_serial->port[0]->interrupt_in_urb;
 532		if (!urb) {
 533			dev_err(&port->dev, "%s - no interrupt urb\n",
 534								__func__);
 535			status = -EINVAL;
 536			goto release_lock;
 537		}
 538		urb->complete = ti_interrupt_callback;
 539		urb->context = tdev;
 540		urb->dev = dev;
 541		status = usb_submit_urb(urb, GFP_KERNEL);
 542		if (status) {
 543			dev_err(&port->dev,
 544				"%s - submit interrupt urb failed, %d\n",
 545					__func__, status);
 546			goto release_lock;
 547		}
 548	}
 549
 550	if (tty)
 551		ti_set_termios(tty, port, tty->termios);
 552
 553	dbg("%s - sending TI_OPEN_PORT", __func__);
 554	status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 555		(__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 556	if (status) {
 557		dev_err(&port->dev, "%s - cannot send open command, %d\n",
 558							__func__, status);
 559		goto unlink_int_urb;
 560	}
 561
 562	dbg("%s - sending TI_START_PORT", __func__);
 563	status = ti_command_out_sync(tdev, TI_START_PORT,
 564		(__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 565	if (status) {
 566		dev_err(&port->dev, "%s - cannot send start command, %d\n",
 567							__func__, status);
 568		goto unlink_int_urb;
 569	}
 570
 571	dbg("%s - sending TI_PURGE_PORT", __func__);
 572	status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 573		(__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 574	if (status) {
 575		dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 576							__func__, status);
 577		goto unlink_int_urb;
 578	}
 579	status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 580		(__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 581	if (status) {
 582		dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 583							__func__, status);
 584		goto unlink_int_urb;
 585	}
 586
 587	/* reset the data toggle on the bulk endpoints to work around bug in
 588	 * host controllers where things get out of sync some times */
 589	usb_clear_halt(dev, port->write_urb->pipe);
 590	usb_clear_halt(dev, port->read_urb->pipe);
 591
 592	if (tty)
 593		ti_set_termios(tty, port, tty->termios);
 594
 595	dbg("%s - sending TI_OPEN_PORT (2)", __func__);
 596	status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 597		(__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 598	if (status) {
 599		dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 600							__func__, status);
 601		goto unlink_int_urb;
 602	}
 603
 604	dbg("%s - sending TI_START_PORT (2)", __func__);
 605	status = ti_command_out_sync(tdev, TI_START_PORT,
 606		(__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 607	if (status) {
 608		dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 609							__func__, status);
 610		goto unlink_int_urb;
 611	}
 612
 613	/* start read urb */
 614	dbg("%s - start read urb", __func__);
 615	urb = port->read_urb;
 616	if (!urb) {
 617		dev_err(&port->dev, "%s - no read urb\n", __func__);
 618		status = -EINVAL;
 619		goto unlink_int_urb;
 620	}
 621	tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 622	urb->complete = ti_bulk_in_callback;
 623	urb->context = tport;
 624	urb->dev = dev;
 625	status = usb_submit_urb(urb, GFP_KERNEL);
 626	if (status) {
 627		dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 628							__func__, status);
 629		goto unlink_int_urb;
 630	}
 631
 632	tport->tp_is_open = 1;
 633	++tdev->td_open_port_count;
 634
 635	goto release_lock;
 636
 637unlink_int_urb:
 638	if (tdev->td_open_port_count == 0)
 639		usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 640release_lock:
 641	mutex_unlock(&tdev->td_open_close_lock);
 642	dbg("%s - exit %d", __func__, status);
 643	return status;
 644}
 645
 646
 647static void ti_close(struct usb_serial_port *port)
 648{
 649	struct ti_device *tdev;
 650	struct ti_port *tport;
 651	int port_number;
 652	int status;
 653	int do_unlock;
 654
 655	dbg("%s - port %d", __func__, port->number);
 656
 657	tdev = usb_get_serial_data(port->serial);
 658	tport = usb_get_serial_port_data(port);
 659	if (tdev == NULL || tport == NULL)
 660		return;
 661
 662	tport->tp_is_open = 0;
 663
 664	ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 665
 666	usb_kill_urb(port->read_urb);
 667	usb_kill_urb(port->write_urb);
 668	tport->tp_write_urb_in_use = 0;
 669
 670	port_number = port->number - port->serial->minor;
 671
 672	dbg("%s - sending TI_CLOSE_PORT", __func__);
 673	status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 674		     (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 675	if (status)
 676		dev_err(&port->dev,
 677			"%s - cannot send close port command, %d\n"
 678							, __func__, status);
 679
 680	/* if mutex_lock is interrupted, continue anyway */
 681	do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 682	--tport->tp_tdev->td_open_port_count;
 683	if (tport->tp_tdev->td_open_port_count <= 0) {
 684		/* last port is closed, shut down interrupt urb */
 685		usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 686		tport->tp_tdev->td_open_port_count = 0;
 687	}
 688	if (do_unlock)
 689		mutex_unlock(&tdev->td_open_close_lock);
 690
 691	dbg("%s - exit", __func__);
 692}
 693
 694
 695static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 696			const unsigned char *data, int count)
 697{
 698	struct ti_port *tport = usb_get_serial_port_data(port);
 699
 700	dbg("%s - port %d", __func__, port->number);
 701
 702	if (count == 0) {
 703		dbg("%s - write request of 0 bytes", __func__);
 704		return 0;
 705	}
 706
 707	if (tport == NULL || !tport->tp_is_open)
 708		return -ENODEV;
 709
 710	count = kfifo_in_locked(&tport->write_fifo, data, count,
 711							&tport->tp_lock);
 712	ti_send(tport);
 713
 714	return count;
 715}
 716
 717
 718static int ti_write_room(struct tty_struct *tty)
 719{
 720	struct usb_serial_port *port = tty->driver_data;
 721	struct ti_port *tport = usb_get_serial_port_data(port);
 722	int room = 0;
 723	unsigned long flags;
 724
 725	dbg("%s - port %d", __func__, port->number);
 726
 727	if (tport == NULL)
 728		return 0;
 729
 730	spin_lock_irqsave(&tport->tp_lock, flags);
 731	room = kfifo_avail(&tport->write_fifo);
 732	spin_unlock_irqrestore(&tport->tp_lock, flags);
 733
 734	dbg("%s - returns %d", __func__, room);
 735	return room;
 736}
 737
 738
 739static int ti_chars_in_buffer(struct tty_struct *tty)
 740{
 741	struct usb_serial_port *port = tty->driver_data;
 742	struct ti_port *tport = usb_get_serial_port_data(port);
 743	int chars = 0;
 744	unsigned long flags;
 745
 746	dbg("%s - port %d", __func__, port->number);
 747
 748	if (tport == NULL)
 749		return 0;
 750
 751	spin_lock_irqsave(&tport->tp_lock, flags);
 752	chars = kfifo_len(&tport->write_fifo);
 753	spin_unlock_irqrestore(&tport->tp_lock, flags);
 754
 755	dbg("%s - returns %d", __func__, chars);
 756	return chars;
 757}
 758
 759
 760static void ti_throttle(struct tty_struct *tty)
 761{
 762	struct usb_serial_port *port = tty->driver_data;
 763	struct ti_port *tport = usb_get_serial_port_data(port);
 764
 765	dbg("%s - port %d", __func__, port->number);
 766
 767	if (tport == NULL)
 768		return;
 769
 770	if (I_IXOFF(tty) || C_CRTSCTS(tty))
 771		ti_stop_read(tport, tty);
 772
 773}
 774
 775
 776static void ti_unthrottle(struct tty_struct *tty)
 777{
 778	struct usb_serial_port *port = tty->driver_data;
 779	struct ti_port *tport = usb_get_serial_port_data(port);
 780	int status;
 781
 782	dbg("%s - port %d", __func__, port->number);
 783
 784	if (tport == NULL)
 785		return;
 786
 787	if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 788		status = ti_restart_read(tport, tty);
 789		if (status)
 790			dev_err(&port->dev, "%s - cannot restart read, %d\n",
 791							__func__, status);
 792	}
 793}
 794
 795static int ti_get_icount(struct tty_struct *tty,
 796		struct serial_icounter_struct *icount)
 797{
 798	struct usb_serial_port *port = tty->driver_data;
 799	struct ti_port *tport = usb_get_serial_port_data(port);
 800	struct async_icount cnow = tport->tp_icount;
 801
 802	dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
 803		__func__, port->number,
 804		cnow.rx, cnow.tx);
 805
 806	icount->cts = cnow.cts;
 807	icount->dsr = cnow.dsr;
 808	icount->rng = cnow.rng;
 809	icount->dcd = cnow.dcd;
 810	icount->rx = cnow.rx;
 811	icount->tx = cnow.tx;
 812	icount->frame = cnow.frame;
 813	icount->overrun = cnow.overrun;
 814	icount->parity = cnow.parity;
 815	icount->brk = cnow.brk;
 816	icount->buf_overrun = cnow.buf_overrun;
 817
 818	return 0;
 819}
 820
 821static int ti_ioctl(struct tty_struct *tty,
 822	unsigned int cmd, unsigned long arg)
 823{
 824	struct usb_serial_port *port = tty->driver_data;
 825	struct ti_port *tport = usb_get_serial_port_data(port);
 826	struct async_icount cnow;
 827	struct async_icount cprev;
 828
 829	dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
 830
 831	if (tport == NULL)
 832		return -ENODEV;
 833
 834	switch (cmd) {
 835	case TIOCGSERIAL:
 836		dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
 837		return ti_get_serial_info(tport,
 838				(struct serial_struct __user *)arg);
 839	case TIOCSSERIAL:
 840		dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
 841		return ti_set_serial_info(tty, tport,
 842				(struct serial_struct __user *)arg);
 843	case TIOCMIWAIT:
 844		dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 845		cprev = tport->tp_icount;
 846		while (1) {
 847			interruptible_sleep_on(&tport->tp_msr_wait);
 848			if (signal_pending(current))
 849				return -ERESTARTSYS;
 850			cnow = tport->tp_icount;
 851			if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 852			    cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 853				return -EIO; /* no change => error */
 854			if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 855			    ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 856			    ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 857			    ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 858				return 0;
 859			cprev = cnow;
 860		}
 861		break;
 862	}
 863	return -ENOIOCTLCMD;
 864}
 865
 866
 867static void ti_set_termios(struct tty_struct *tty,
 868		struct usb_serial_port *port, struct ktermios *old_termios)
 869{
 870	struct ti_port *tport = usb_get_serial_port_data(port);
 871	struct ti_uart_config *config;
 872	tcflag_t cflag, iflag;
 873	int baud;
 874	int status;
 875	int port_number = port->number - port->serial->minor;
 876	unsigned int mcr;
 877
 878	dbg("%s - port %d", __func__, port->number);
 879
 880	cflag = tty->termios->c_cflag;
 881	iflag = tty->termios->c_iflag;
 882
 883	dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
 884	dbg("%s - old clfag %08x, old iflag %08x", __func__,
 885				old_termios->c_cflag, old_termios->c_iflag);
 886
 887	if (tport == NULL)
 888		return;
 889
 890	config = kmalloc(sizeof(*config), GFP_KERNEL);
 891	if (!config) {
 892		dev_err(&port->dev, "%s - out of memory\n", __func__);
 893		return;
 894	}
 895
 896	config->wFlags = 0;
 897
 898	/* these flags must be set */
 899	config->wFlags |= TI_UART_ENABLE_MS_INTS;
 900	config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 901	config->bUartMode = (__u8)(tport->tp_uart_mode);
 902
 903	switch (cflag & CSIZE) {
 904	case CS5:
 905		    config->bDataBits = TI_UART_5_DATA_BITS;
 906		    break;
 907	case CS6:
 908		    config->bDataBits = TI_UART_6_DATA_BITS;
 909		    break;
 910	case CS7:
 911		    config->bDataBits = TI_UART_7_DATA_BITS;
 912		    break;
 913	default:
 914	case CS8:
 915		    config->bDataBits = TI_UART_8_DATA_BITS;
 916		    break;
 917	}
 918
 919	/* CMSPAR isn't supported by this driver */
 920	tty->termios->c_cflag &= ~CMSPAR;
 921
 922	if (cflag & PARENB) {
 923		if (cflag & PARODD) {
 924			config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 925			config->bParity = TI_UART_ODD_PARITY;
 926		} else {
 927			config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 928			config->bParity = TI_UART_EVEN_PARITY;
 929		}
 930	} else {
 931		config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 932		config->bParity = TI_UART_NO_PARITY;
 933	}
 934
 935	if (cflag & CSTOPB)
 936		config->bStopBits = TI_UART_2_STOP_BITS;
 937	else
 938		config->bStopBits = TI_UART_1_STOP_BITS;
 939
 940	if (cflag & CRTSCTS) {
 941		/* RTS flow control must be off to drop RTS for baud rate B0 */
 942		if ((cflag & CBAUD) != B0)
 943			config->wFlags |= TI_UART_ENABLE_RTS_IN;
 944		config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 945	} else {
 946		tty->hw_stopped = 0;
 947		ti_restart_read(tport, tty);
 948	}
 949
 950	if (I_IXOFF(tty) || I_IXON(tty)) {
 951		config->cXon  = START_CHAR(tty);
 952		config->cXoff = STOP_CHAR(tty);
 953
 954		if (I_IXOFF(tty))
 955			config->wFlags |= TI_UART_ENABLE_X_IN;
 956		else
 957			ti_restart_read(tport, tty);
 958
 959		if (I_IXON(tty))
 960			config->wFlags |= TI_UART_ENABLE_X_OUT;
 961	}
 962
 963	baud = tty_get_baud_rate(tty);
 964	if (!baud)
 965		baud = 9600;
 966	if (tport->tp_tdev->td_is_3410)
 967		config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 968	else
 969		config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 970
 971	/* FIXME: Should calculate resulting baud here and report it back */
 972	if ((cflag & CBAUD) != B0)
 973		tty_encode_baud_rate(tty, baud, baud);
 974
 975	dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 976	__func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 977
 978	cpu_to_be16s(&config->wBaudRate);
 979	cpu_to_be16s(&config->wFlags);
 980
 981	status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 982		(__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 983		sizeof(*config));
 984	if (status)
 985		dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 986					__func__, port_number, status);
 987
 988	/* SET_CONFIG asserts RTS and DTR, reset them correctly */
 989	mcr = tport->tp_shadow_mcr;
 990	/* if baud rate is B0, clear RTS and DTR */
 991	if ((cflag & CBAUD) == B0)
 992		mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 993	status = ti_set_mcr(tport, mcr);
 994	if (status)
 995		dev_err(&port->dev,
 996			"%s - cannot set modem control on port %d, %d\n",
 997						__func__, port_number, status);
 998
 999	kfree(config);
1000}
1001
1002
1003static int ti_tiocmget(struct tty_struct *tty)
1004{
1005	struct usb_serial_port *port = tty->driver_data;
1006	struct ti_port *tport = usb_get_serial_port_data(port);
1007	unsigned int result;
1008	unsigned int msr;
1009	unsigned int mcr;
1010	unsigned long flags;
1011
1012	dbg("%s - port %d", __func__, port->number);
1013
1014	if (tport == NULL)
1015		return -ENODEV;
1016
1017	spin_lock_irqsave(&tport->tp_lock, flags);
1018	msr = tport->tp_msr;
1019	mcr = tport->tp_shadow_mcr;
1020	spin_unlock_irqrestore(&tport->tp_lock, flags);
1021
1022	result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1023		| ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1024		| ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1025		| ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1026		| ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1027		| ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1028		| ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1029
1030	dbg("%s - 0x%04X", __func__, result);
1031
1032	return result;
1033}
1034
1035
1036static int ti_tiocmset(struct tty_struct *tty,
1037				unsigned int set, unsigned int clear)
1038{
1039	struct usb_serial_port *port = tty->driver_data;
1040	struct ti_port *tport = usb_get_serial_port_data(port);
1041	unsigned int mcr;
1042	unsigned long flags;
1043
1044	dbg("%s - port %d", __func__, port->number);
1045
1046	if (tport == NULL)
1047		return -ENODEV;
1048
1049	spin_lock_irqsave(&tport->tp_lock, flags);
1050	mcr = tport->tp_shadow_mcr;
1051
1052	if (set & TIOCM_RTS)
1053		mcr |= TI_MCR_RTS;
1054	if (set & TIOCM_DTR)
1055		mcr |= TI_MCR_DTR;
1056	if (set & TIOCM_LOOP)
1057		mcr |= TI_MCR_LOOP;
1058
1059	if (clear & TIOCM_RTS)
1060		mcr &= ~TI_MCR_RTS;
1061	if (clear & TIOCM_DTR)
1062		mcr &= ~TI_MCR_DTR;
1063	if (clear & TIOCM_LOOP)
1064		mcr &= ~TI_MCR_LOOP;
1065	spin_unlock_irqrestore(&tport->tp_lock, flags);
1066
1067	return ti_set_mcr(tport, mcr);
1068}
1069
1070
1071static void ti_break(struct tty_struct *tty, int break_state)
1072{
1073	struct usb_serial_port *port = tty->driver_data;
1074	struct ti_port *tport = usb_get_serial_port_data(port);
1075	int status;
1076
1077	dbg("%s - state = %d", __func__, break_state);
1078
1079	if (tport == NULL)
1080		return;
1081
1082	ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1083
1084	status = ti_write_byte(tport->tp_tdev,
1085		tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1086		TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1087
1088	if (status)
1089		dbg("%s - error setting break, %d", __func__, status);
1090}
1091
1092
1093static void ti_interrupt_callback(struct urb *urb)
1094{
1095	struct ti_device *tdev = urb->context;
1096	struct usb_serial_port *port;
1097	struct usb_serial *serial = tdev->td_serial;
1098	struct ti_port *tport;
1099	struct device *dev = &urb->dev->dev;
1100	unsigned char *data = urb->transfer_buffer;
1101	int length = urb->actual_length;
1102	int port_number;
1103	int function;
1104	int status = urb->status;
1105	int retval;
1106	__u8 msr;
1107
1108	dbg("%s", __func__);
1109
1110	switch (status) {
1111	case 0:
1112		break;
1113	case -ECONNRESET:
1114	case -ENOENT:
1115	case -ESHUTDOWN:
1116		dbg("%s - urb shutting down, %d", __func__, status);
1117		tdev->td_urb_error = 1;
1118		return;
1119	default:
1120		dev_err(dev, "%s - nonzero urb status, %d\n",
1121			__func__, status);
1122		tdev->td_urb_error = 1;
1123		goto exit;
1124	}
1125
1126	if (length != 2) {
1127		dbg("%s - bad packet size, %d", __func__, length);
1128		goto exit;
1129	}
1130
1131	if (data[0] == TI_CODE_HARDWARE_ERROR) {
1132		dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1133		goto exit;
1134	}
1135
1136	port_number = TI_GET_PORT_FROM_CODE(data[0]);
1137	function = TI_GET_FUNC_FROM_CODE(data[0]);
1138
1139	dbg("%s - port_number %d, function %d, data 0x%02X",
1140				__func__, port_number, function, data[1]);
1141
1142	if (port_number >= serial->num_ports) {
1143		dev_err(dev, "%s - bad port number, %d\n",
1144						__func__, port_number);
1145		goto exit;
1146	}
1147
1148	port = serial->port[port_number];
1149
1150	tport = usb_get_serial_port_data(port);
1151	if (!tport)
1152		goto exit;
1153
1154	switch (function) {
1155	case TI_CODE_DATA_ERROR:
1156		dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1157					__func__, port_number, data[1]);
1158		break;
1159
1160	case TI_CODE_MODEM_STATUS:
1161		msr = data[1];
1162		dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1163		ti_handle_new_msr(tport, msr);
1164		break;
1165
1166	default:
1167		dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1168							__func__, data[1]);
1169		break;
1170	}
1171
1172exit:
1173	retval = usb_submit_urb(urb, GFP_ATOMIC);
1174	if (retval)
1175		dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1176			__func__, retval);
1177}
1178
1179
1180static void ti_bulk_in_callback(struct urb *urb)
1181{
1182	struct ti_port *tport = urb->context;
1183	struct usb_serial_port *port = tport->tp_port;
1184	struct device *dev = &urb->dev->dev;
1185	int status = urb->status;
1186	int retval = 0;
1187	struct tty_struct *tty;
1188
1189	dbg("%s", __func__);
1190
1191	switch (status) {
1192	case 0:
1193		break;
1194	case -ECONNRESET:
1195	case -ENOENT:
1196	case -ESHUTDOWN:
1197		dbg("%s - urb shutting down, %d", __func__, status);
1198		tport->tp_tdev->td_urb_error = 1;
1199		wake_up_interruptible(&tport->tp_write_wait);
1200		return;
1201	default:
1202		dev_err(dev, "%s - nonzero urb status, %d\n",
1203			__func__, status);
1204		tport->tp_tdev->td_urb_error = 1;
1205		wake_up_interruptible(&tport->tp_write_wait);
1206	}
1207
1208	if (status == -EPIPE)
1209		goto exit;
1210
1211	if (status) {
1212		dev_err(dev, "%s - stopping read!\n", __func__);
1213		return;
1214	}
1215
1216	tty = tty_port_tty_get(&port->port);
1217	if (tty) {
1218		if (urb->actual_length) {
1219			usb_serial_debug_data(debug, dev, __func__,
1220				urb->actual_length, urb->transfer_buffer);
1221
1222			if (!tport->tp_is_open)
1223				dbg("%s - port closed, dropping data",
1224					__func__);
1225			else
1226				ti_recv(&urb->dev->dev, tty,
1227						urb->transfer_buffer,
1228						urb->actual_length);
1229			spin_lock(&tport->tp_lock);
1230			tport->tp_icount.rx += urb->actual_length;
1231			spin_unlock(&tport->tp_lock);
1232		}
1233		tty_kref_put(tty);
1234	}
1235
1236exit:
1237	/* continue to read unless stopping */
1238	spin_lock(&tport->tp_lock);
1239	if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1240		urb->dev = port->serial->dev;
1241		retval = usb_submit_urb(urb, GFP_ATOMIC);
1242	} else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1243		tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1244	}
1245	spin_unlock(&tport->tp_lock);
1246	if (retval)
1247		dev_err(dev, "%s - resubmit read urb failed, %d\n",
1248			__func__, retval);
1249}
1250
1251
1252static void ti_bulk_out_callback(struct urb *urb)
1253{
1254	struct ti_port *tport = urb->context;
1255	struct usb_serial_port *port = tport->tp_port;
1256	struct device *dev = &urb->dev->dev;
1257	int status = urb->status;
1258
1259	dbg("%s - port %d", __func__, port->number);
1260
1261	tport->tp_write_urb_in_use = 0;
1262
1263	switch (status) {
1264	case 0:
1265		break;
1266	case -ECONNRESET:
1267	case -ENOENT:
1268	case -ESHUTDOWN:
1269		dbg("%s - urb shutting down, %d", __func__, status);
1270		tport->tp_tdev->td_urb_error = 1;
1271		wake_up_interruptible(&tport->tp_write_wait);
1272		return;
1273	default:
1274		dev_err(dev, "%s - nonzero urb status, %d\n",
1275			__func__, status);
1276		tport->tp_tdev->td_urb_error = 1;
1277		wake_up_interruptible(&tport->tp_write_wait);
1278	}
1279
1280	/* send any buffered data */
1281	ti_send(tport);
1282}
1283
1284
1285static void ti_recv(struct device *dev, struct tty_struct *tty,
1286	unsigned char *data, int length)
1287{
1288	int cnt;
1289
1290	do {
1291		cnt = tty_insert_flip_string(tty, data, length);
1292		if (cnt < length) {
1293			dev_err(dev, "%s - dropping data, %d bytes lost\n",
1294						__func__, length - cnt);
1295			if (cnt == 0)
1296				break;
1297		}
1298		tty_flip_buffer_push(tty);
1299		data += cnt;
1300		length -= cnt;
1301	} while (length > 0);
1302
1303}
1304
1305
1306static void ti_send(struct ti_port *tport)
1307{
1308	int count, result;
1309	struct usb_serial_port *port = tport->tp_port;
1310	struct tty_struct *tty = tty_port_tty_get(&port->port);	/* FIXME */
1311	unsigned long flags;
1312
1313
1314	dbg("%s - port %d", __func__, port->number);
1315
1316	spin_lock_irqsave(&tport->tp_lock, flags);
1317
1318	if (tport->tp_write_urb_in_use)
1319		goto unlock;
1320
1321	count = kfifo_out(&tport->write_fifo,
1322				port->write_urb->transfer_buffer,
1323				port->bulk_out_size);
1324
1325	if (count == 0)
1326		goto unlock;
1327
1328	tport->tp_write_urb_in_use = 1;
1329
1330	spin_unlock_irqrestore(&tport->tp_lock, flags);
1331
1332	usb_serial_debug_data(debug, &port->dev, __func__, count,
1333					port->write_urb->transfer_buffer);
1334
1335	usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1336			   usb_sndbulkpipe(port->serial->dev,
1337					    port->bulk_out_endpointAddress),
1338			   port->write_urb->transfer_buffer, count,
1339			   ti_bulk_out_callback, tport);
1340
1341	result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1342	if (result) {
1343		dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1344							__func__, result);
1345		tport->tp_write_urb_in_use = 0;
1346		/* TODO: reschedule ti_send */
1347	} else {
1348		spin_lock_irqsave(&tport->tp_lock, flags);
1349		tport->tp_icount.tx += count;
1350		spin_unlock_irqrestore(&tport->tp_lock, flags);
1351	}
1352
1353	/* more room in the buffer for new writes, wakeup */
1354	if (tty)
1355		tty_wakeup(tty);
1356	tty_kref_put(tty);
1357	wake_up_interruptible(&tport->tp_write_wait);
1358	return;
1359unlock:
1360	spin_unlock_irqrestore(&tport->tp_lock, flags);
1361	tty_kref_put(tty);
1362	return;
1363}
1364
1365
1366static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1367{
1368	unsigned long flags;
1369	int status;
1370
1371	status = ti_write_byte(tport->tp_tdev,
1372		tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1373		TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1374
1375	spin_lock_irqsave(&tport->tp_lock, flags);
1376	if (!status)
1377		tport->tp_shadow_mcr = mcr;
1378	spin_unlock_irqrestore(&tport->tp_lock, flags);
1379
1380	return status;
1381}
1382
1383
1384static int ti_get_lsr(struct ti_port *tport)
1385{
1386	int size, status;
1387	struct ti_device *tdev = tport->tp_tdev;
1388	struct usb_serial_port *port = tport->tp_port;
1389	int port_number = port->number - port->serial->minor;
1390	struct ti_port_status *data;
1391
1392	dbg("%s - port %d", __func__, port->number);
1393
1394	size = sizeof(struct ti_port_status);
1395	data = kmalloc(size, GFP_KERNEL);
1396	if (!data) {
1397		dev_err(&port->dev, "%s - out of memory\n", __func__);
1398		return -ENOMEM;
1399	}
1400
1401	status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1402		(__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1403	if (status) {
1404		dev_err(&port->dev,
1405			"%s - get port status command failed, %d\n",
1406							__func__, status);
1407		goto free_data;
1408	}
1409
1410	dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1411
1412	tport->tp_lsr = data->bLSR;
1413
1414free_data:
1415	kfree(data);
1416	return status;
1417}
1418
1419
1420static int ti_get_serial_info(struct ti_port *tport,
1421	struct serial_struct __user *ret_arg)
1422{
1423	struct usb_serial_port *port = tport->tp_port;
1424	struct serial_struct ret_serial;
1425
1426	if (!ret_arg)
1427		return -EFAULT;
1428
1429	memset(&ret_serial, 0, sizeof(ret_serial));
1430
1431	ret_serial.type = PORT_16550A;
1432	ret_serial.line = port->serial->minor;
1433	ret_serial.port = port->number - port->serial->minor;
1434	ret_serial.flags = tport->tp_flags;
1435	ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1436	ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1437	ret_serial.closing_wait = tport->tp_closing_wait;
1438
1439	if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1440		return -EFAULT;
1441
1442	return 0;
1443}
1444
1445
1446static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1447	struct serial_struct __user *new_arg)
1448{
1449	struct serial_struct new_serial;
1450
1451	if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1452		return -EFAULT;
1453
1454	tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1455	tport->tp_closing_wait = new_serial.closing_wait;
1456
1457	return 0;
1458}
1459
1460
1461static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1462{
1463	struct async_icount *icount;
1464	struct tty_struct *tty;
1465	unsigned long flags;
1466
1467	dbg("%s - msr 0x%02X", __func__, msr);
1468
1469	if (msr & TI_MSR_DELTA_MASK) {
1470		spin_lock_irqsave(&tport->tp_lock, flags);
1471		icount = &tport->tp_icount;
1472		if (msr & TI_MSR_DELTA_CTS)
1473			icount->cts++;
1474		if (msr & TI_MSR_DELTA_DSR)
1475			icount->dsr++;
1476		if (msr & TI_MSR_DELTA_CD)
1477			icount->dcd++;
1478		if (msr & TI_MSR_DELTA_RI)
1479			icount->rng++;
1480		wake_up_interruptible(&tport->tp_msr_wait);
1481		spin_unlock_irqrestore(&tport->tp_lock, flags);
1482	}
1483
1484	tport->tp_msr = msr & TI_MSR_MASK;
1485
1486	/* handle CTS flow control */
1487	tty = tty_port_tty_get(&tport->tp_port->port);
1488	if (tty && C_CRTSCTS(tty)) {
1489		if (msr & TI_MSR_CTS) {
1490			tty->hw_stopped = 0;
1491			tty_wakeup(tty);
1492		} else {
1493			tty->hw_stopped = 1;
1494		}
1495	}
1496	tty_kref_put(tty);
1497}
1498
1499
1500static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1501{
1502	struct ti_device *tdev = tport->tp_tdev;
1503	struct usb_serial_port *port = tport->tp_port;
1504	wait_queue_t wait;
1505
1506	dbg("%s - port %d", __func__, port->number);
1507
1508	spin_lock_irq(&tport->tp_lock);
1509
1510	/* wait for data to drain from the buffer */
1511	tdev->td_urb_error = 0;
1512	init_waitqueue_entry(&wait, current);
1513	add_wait_queue(&tport->tp_write_wait, &wait);
1514	for (;;) {
1515		set_current_state(TASK_INTERRUPTIBLE);
1516		if (kfifo_len(&tport->write_fifo) == 0
1517		|| timeout == 0 || signal_pending(current)
1518		|| tdev->td_urb_error
1519		|| port->serial->disconnected)  /* disconnect */
1520			break;
1521		spin_unlock_irq(&tport->tp_lock);
1522		timeout = schedule_timeout(timeout);
1523		spin_lock_irq(&tport->tp_lock);
1524	}
1525	set_current_state(TASK_RUNNING);
1526	remove_wait_queue(&tport->tp_write_wait, &wait);
1527
1528	/* flush any remaining data in the buffer */
1529	if (flush)
1530		kfifo_reset_out(&tport->write_fifo);
1531
1532	spin_unlock_irq(&tport->tp_lock);
1533
1534	mutex_lock(&port->serial->disc_mutex);
1535	/* wait for data to drain from the device */
1536	/* wait for empty tx register, plus 20 ms */
1537	timeout += jiffies;
1538	tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1539	while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1540	&& !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1541	&& !port->serial->disconnected) {
1542		if (ti_get_lsr(tport))
1543			break;
1544		mutex_unlock(&port->serial->disc_mutex);
1545		msleep_interruptible(20);
1546		mutex_lock(&port->serial->disc_mutex);
1547	}
1548	mutex_unlock(&port->serial->disc_mutex);
1549}
1550
1551
1552static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1553{
1554	unsigned long flags;
1555
1556	spin_lock_irqsave(&tport->tp_lock, flags);
1557
1558	if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1559		tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1560
1561	spin_unlock_irqrestore(&tport->tp_lock, flags);
1562}
1563
1564
1565static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1566{
1567	struct urb *urb;
1568	int status = 0;
1569	unsigned long flags;
1570
1571	spin_lock_irqsave(&tport->tp_lock, flags);
1572
1573	if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1574		tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1575		urb = tport->tp_port->read_urb;
1576		spin_unlock_irqrestore(&tport->tp_lock, flags);
1577		urb->complete = ti_bulk_in_callback;
1578		urb->context = tport;
1579		urb->dev = tport->tp_port->serial->dev;
1580		status = usb_submit_urb(urb, GFP_KERNEL);
1581	} else  {
1582		tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1583		spin_unlock_irqrestore(&tport->tp_lock, flags);
1584	}
1585
1586	return status;
1587}
1588
1589
1590static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1591	__u16 moduleid, __u16 value, __u8 *data, int size)
1592{
1593	int status;
1594
1595	status = usb_control_msg(tdev->td_serial->dev,
1596		usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1597		(USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1598		value, moduleid, data, size, 1000);
1599
1600	if (status == size)
1601		status = 0;
1602
1603	if (status > 0)
1604		status = -ECOMM;
1605
1606	return status;
1607}
1608
1609
1610static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1611	__u16 moduleid, __u16 value, __u8 *data, int size)
1612{
1613	int status;
1614
1615	status = usb_control_msg(tdev->td_serial->dev,
1616		usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1617		(USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1618		value, moduleid, data, size, 1000);
1619
1620	if (status == size)
1621		status = 0;
1622
1623	if (status > 0)
1624		status = -ECOMM;
1625
1626	return status;
1627}
1628
1629
1630static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1631	__u8 mask, __u8 byte)
1632{
1633	int status;
1634	unsigned int size;
1635	struct ti_write_data_bytes *data;
1636	struct device *dev = &tdev->td_serial->dev->dev;
1637
1638	dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1639					__func__, addr, mask, byte);
1640
1641	size = sizeof(struct ti_write_data_bytes) + 2;
1642	data = kmalloc(size, GFP_KERNEL);
1643	if (!data) {
1644		dev_err(dev, "%s - out of memory\n", __func__);
1645		return -ENOMEM;
1646	}
1647
1648	data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1649	data->bDataType = TI_RW_DATA_BYTE;
1650	data->bDataCounter = 1;
1651	data->wBaseAddrHi = cpu_to_be16(addr>>16);
1652	data->wBaseAddrLo = cpu_to_be16(addr);
1653	data->bData[0] = mask;
1654	data->bData[1] = byte;
1655
1656	status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1657		(__u8 *)data, size);
1658
1659	if (status < 0)
1660		dev_err(dev, "%s - failed, %d\n", __func__, status);
1661
1662	kfree(data);
1663
1664	return status;
1665}
1666
1667static int ti_do_download(struct usb_device *dev, int pipe,
1668						u8 *buffer, int size)
1669{
1670	int pos;
1671	u8 cs = 0;
1672	int done;
1673	struct ti_firmware_header *header;
1674	int status = 0;
1675	int len;
1676
1677	for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1678		cs = (__u8)(cs + buffer[pos]);
1679
1680	header = (struct ti_firmware_header *)buffer;
1681	header->wLength = cpu_to_le16((__u16)(size
1682					- sizeof(struct ti_firmware_header)));
1683	header->bCheckSum = cs;
1684
1685	dbg("%s - downloading firmware", __func__);
1686	for (pos = 0; pos < size; pos += done) {
1687		len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1688		status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1689								&done, 1000);
1690		if (status)
1691			break;
1692	}
1693	return status;
1694}
1695
1696static int ti_download_firmware(struct ti_device *tdev)
1697{
1698	int status;
1699	int buffer_size;
1700	__u8 *buffer;
1701	struct usb_device *dev = tdev->td_serial->dev;
1702	unsigned int pipe = usb_sndbulkpipe(dev,
1703		tdev->td_serial->port[0]->bulk_out_endpointAddress);
1704	const struct firmware *fw_p;
1705	char buf[32];
1706
1707	dbg("%s\n", __func__);
1708	/* try ID specific firmware first, then try generic firmware */
1709	sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1710	    dev->descriptor.idProduct);
1711	if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
 
 
1712		buf[0] = '\0';
1713		if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1714			switch (dev->descriptor.idProduct) {
1715			case MTS_CDMA_PRODUCT_ID:
1716				strcpy(buf, "mts_cdma.fw");
1717				break;
1718			case MTS_GSM_PRODUCT_ID:
1719				strcpy(buf, "mts_gsm.fw");
1720				break;
1721			case MTS_EDGE_PRODUCT_ID:
1722				strcpy(buf, "mts_edge.fw");
1723				break;
1724			case MTS_MT9234MU_PRODUCT_ID:
1725				strcpy(buf, "mts_mt9234mu.fw");
1726				break;
1727			case MTS_MT9234ZBA_PRODUCT_ID:
1728				strcpy(buf, "mts_mt9234zba.fw");
1729				break;
1730			case MTS_MT9234ZBAOLD_PRODUCT_ID:
1731				strcpy(buf, "mts_mt9234zba.fw");
1732				break;			}
1733		}
1734		if (buf[0] == '\0') {
1735			if (tdev->td_is_3410)
1736				strcpy(buf, "ti_3410.fw");
1737			else
1738				strcpy(buf, "ti_5052.fw");
1739		}
1740		status = request_firmware(&fw_p, buf, &dev->dev);
1741	}
1742	if (status) {
1743		dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1744		return -ENOENT;
1745	}
1746	if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1747		dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1748		release_firmware(fw_p);
1749		return -ENOENT;
1750	}
1751
1752	buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1753	buffer = kmalloc(buffer_size, GFP_KERNEL);
1754	if (buffer) {
1755		memcpy(buffer, fw_p->data, fw_p->size);
1756		memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1757		status = ti_do_download(dev, pipe, buffer, fw_p->size);
1758		kfree(buffer);
1759	} else {
1760		dbg("%s ENOMEM\n", __func__);
1761		status = -ENOMEM;
1762	}
1763	release_firmware(fw_p);
1764	if (status) {
1765		dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1766							__func__, status);
1767		return status;
1768	}
1769
1770	dbg("%s - download successful", __func__);
1771
1772	return 0;
1773}