Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/usb/serial/ti_usb_3410_5052.c

  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/slab.h>
 25 #include <linux/tty.h>
 26 #include <linux/tty_driver.h>
 27 #include <linux/tty_flip.h>
 28 #include <linux/module.h>
 29 #include <linux/spinlock.h>
 30 #include <linux/ioctl.h>
 31 #include <linux/serial.h>
 32 #include <linux/kfifo.h>
 33 #include <linux/mutex.h>
 34 #include <linux/uaccess.h>
 35 #include <linux/usb.h>
 36 #include <linux/usb/serial.h>
 37 
 38 #include "ti_usb_3410_5052.h"
 39 
 40 /* Defines */
 41 
 42 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
 43 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
 44 
 45 #define TI_FIRMWARE_BUF_SIZE    16284
 46 
 47 #define TI_TRANSFER_TIMEOUT     2
 48 
 49 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
 50 
 51 /* supported setserial flags */
 52 #define TI_SET_SERIAL_FLAGS     0
 53 
 54 /* read urb states */
 55 #define TI_READ_URB_RUNNING     0
 56 #define TI_READ_URB_STOPPING    1
 57 #define TI_READ_URB_STOPPED     2
 58 
 59 #define TI_EXTRA_VID_PID_COUNT  5
 60 
 61 
 62 /* Structures */
 63 
 64 struct ti_port {
 65         int                     tp_is_open;
 66         __u8                    tp_msr;
 67         __u8                    tp_shadow_mcr;
 68         __u8                    tp_uart_mode;   /* 232 or 485 modes */
 69         unsigned int            tp_uart_base_addr;
 70         int                     tp_flags;
 71         struct ti_device        *tp_tdev;
 72         struct usb_serial_port  *tp_port;
 73         spinlock_t              tp_lock;
 74         int                     tp_read_urb_state;
 75         int                     tp_write_urb_in_use;
 76 };
 77 
 78 struct ti_device {
 79         struct mutex            td_open_close_lock;
 80         int                     td_open_port_count;
 81         struct usb_serial       *td_serial;
 82         int                     td_is_3410;
 83         int                     td_urb_error;
 84 };
 85 
 86 
 87 /* Function Declarations */
 88 
 89 static int ti_startup(struct usb_serial *serial);
 90 static void ti_release(struct usb_serial *serial);
 91 static int ti_port_probe(struct usb_serial_port *port);
 92 static int ti_port_remove(struct usb_serial_port *port);
 93 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 94 static void ti_close(struct usb_serial_port *port);
 95 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 96                 const unsigned char *data, int count);
 97 static int ti_write_room(struct tty_struct *tty);
 98 static int ti_chars_in_buffer(struct tty_struct *tty);
 99 static bool ti_tx_empty(struct usb_serial_port *port);
100 static void ti_throttle(struct tty_struct *tty);
101 static void ti_unthrottle(struct tty_struct *tty);
102 static int ti_ioctl(struct tty_struct *tty,
103                 unsigned int cmd, unsigned long arg);
104 static void ti_set_termios(struct tty_struct *tty,
105                 struct usb_serial_port *port, struct ktermios *old_termios);
106 static int ti_tiocmget(struct tty_struct *tty);
107 static int ti_tiocmset(struct tty_struct *tty,
108                 unsigned int set, unsigned int clear);
109 static void ti_break(struct tty_struct *tty, int break_state);
110 static void ti_interrupt_callback(struct urb *urb);
111 static void ti_bulk_in_callback(struct urb *urb);
112 static void ti_bulk_out_callback(struct urb *urb);
113 
114 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
115                 int length);
116 static void ti_send(struct ti_port *tport);
117 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
118 static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
119 static int ti_get_serial_info(struct ti_port *tport,
120         struct serial_struct __user *ret_arg);
121 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
122         struct serial_struct __user *new_arg);
123 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
124 
125 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
126 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
127 
128 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
129         __u16 moduleid, __u16 value, __u8 *data, int size);
130 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
131         __u16 moduleid, __u16 value, __u8 *data, int size);
132 
133 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
134                          unsigned long addr, __u8 mask, __u8 byte);
135 
136 static int ti_download_firmware(struct ti_device *tdev);
137 
138 
139 /* Data */
140 
141 /* module parameters */
142 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
143 
144 /* supported devices */
145 static const struct usb_device_id ti_id_table_3410[] = {
146         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
147         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
148         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
149         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
150         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
151         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
152         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
153         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
154         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
155         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
156         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
157         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
158         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
159         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
160         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
161         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
162         { }     /* terminator */
163 };
164 
165 static const struct usb_device_id ti_id_table_5052[] = {
166         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
167         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
168         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
169         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
170         { }     /* terminator */
171 };
172 
173 static const struct usb_device_id ti_id_table_combined[] = {
174         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
175         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
176         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
177         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
178         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
179         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
180         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
181         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
182         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
183         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
184         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
185         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
186         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
187         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
188         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
189         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
190         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
191         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
192         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
193         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
194         { }     /* terminator */
195 };
196 
197 static struct usb_serial_driver ti_1port_device = {
198         .driver = {
199                 .owner          = THIS_MODULE,
200                 .name           = "ti_usb_3410_5052_1",
201         },
202         .description            = "TI USB 3410 1 port adapter",
203         .id_table               = ti_id_table_3410,
204         .num_ports              = 1,
205         .attach                 = ti_startup,
206         .release                = ti_release,
207         .port_probe             = ti_port_probe,
208         .port_remove            = ti_port_remove,
209         .open                   = ti_open,
210         .close                  = ti_close,
211         .write                  = ti_write,
212         .write_room             = ti_write_room,
213         .chars_in_buffer        = ti_chars_in_buffer,
214         .tx_empty               = ti_tx_empty,
215         .throttle               = ti_throttle,
216         .unthrottle             = ti_unthrottle,
217         .ioctl                  = ti_ioctl,
218         .set_termios            = ti_set_termios,
219         .tiocmget               = ti_tiocmget,
220         .tiocmset               = ti_tiocmset,
221         .tiocmiwait             = usb_serial_generic_tiocmiwait,
222         .get_icount             = usb_serial_generic_get_icount,
223         .break_ctl              = ti_break,
224         .read_int_callback      = ti_interrupt_callback,
225         .read_bulk_callback     = ti_bulk_in_callback,
226         .write_bulk_callback    = ti_bulk_out_callback,
227 };
228 
229 static struct usb_serial_driver ti_2port_device = {
230         .driver = {
231                 .owner          = THIS_MODULE,
232                 .name           = "ti_usb_3410_5052_2",
233         },
234         .description            = "TI USB 5052 2 port adapter",
235         .id_table               = ti_id_table_5052,
236         .num_ports              = 2,
237         .attach                 = ti_startup,
238         .release                = ti_release,
239         .port_probe             = ti_port_probe,
240         .port_remove            = ti_port_remove,
241         .open                   = ti_open,
242         .close                  = ti_close,
243         .write                  = ti_write,
244         .write_room             = ti_write_room,
245         .chars_in_buffer        = ti_chars_in_buffer,
246         .tx_empty               = ti_tx_empty,
247         .throttle               = ti_throttle,
248         .unthrottle             = ti_unthrottle,
249         .ioctl                  = ti_ioctl,
250         .set_termios            = ti_set_termios,
251         .tiocmget               = ti_tiocmget,
252         .tiocmset               = ti_tiocmset,
253         .tiocmiwait             = usb_serial_generic_tiocmiwait,
254         .get_icount             = usb_serial_generic_get_icount,
255         .break_ctl              = ti_break,
256         .read_int_callback      = ti_interrupt_callback,
257         .read_bulk_callback     = ti_bulk_in_callback,
258         .write_bulk_callback    = ti_bulk_out_callback,
259 };
260 
261 static struct usb_serial_driver * const serial_drivers[] = {
262         &ti_1port_device, &ti_2port_device, NULL
263 };
264 
265 /* Module */
266 
267 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
268 MODULE_DESCRIPTION(TI_DRIVER_DESC);
269 MODULE_LICENSE("GPL");
270 
271 MODULE_FIRMWARE("ti_3410.fw");
272 MODULE_FIRMWARE("ti_5052.fw");
273 MODULE_FIRMWARE("mts_cdma.fw");
274 MODULE_FIRMWARE("mts_gsm.fw");
275 MODULE_FIRMWARE("mts_edge.fw");
276 MODULE_FIRMWARE("mts_mt9234mu.fw");
277 MODULE_FIRMWARE("mts_mt9234zba.fw");
278 
279 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
280 MODULE_PARM_DESC(closing_wait,
281     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
282 
283 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
284 
285 module_usb_serial_driver(serial_drivers, ti_id_table_combined);
286 
287 /* Functions */
288 
289 static int ti_startup(struct usb_serial *serial)
290 {
291         struct ti_device *tdev;
292         struct usb_device *dev = serial->dev;
293         int status;
294 
295         dev_dbg(&dev->dev,
296                 "%s - product 0x%4X, num configurations %d, configuration value %d\n",
297                 __func__, le16_to_cpu(dev->descriptor.idProduct),
298                 dev->descriptor.bNumConfigurations,
299                 dev->actconfig->desc.bConfigurationValue);
300 
301         /* create device structure */
302         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
303         if (!tdev)
304                 return -ENOMEM;
305 
306         mutex_init(&tdev->td_open_close_lock);
307         tdev->td_serial = serial;
308         usb_set_serial_data(serial, tdev);
309 
310         /* determine device type */
311         if (serial->type == &ti_1port_device)
312                 tdev->td_is_3410 = 1;
313         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
314                 tdev->td_is_3410 ? "3410" : "5052");
315 
316         /* if we have only 1 configuration, download firmware */
317         if (dev->descriptor.bNumConfigurations == 1) {
318                 status = ti_download_firmware(tdev);
319 
320                 if (status != 0)
321                         goto free_tdev;
322 
323                 /* 3410 must be reset, 5052 resets itself */
324                 if (tdev->td_is_3410) {
325                         msleep_interruptible(100);
326                         usb_reset_device(dev);
327                 }
328 
329                 status = -ENODEV;
330                 goto free_tdev;
331         }
332 
333         /* the second configuration must be set */
334         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
335                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
336                 status = status ? status : -ENODEV;
337                 goto free_tdev;
338         }
339 
340         return 0;
341 
342 free_tdev:
343         kfree(tdev);
344         usb_set_serial_data(serial, NULL);
345         return status;
346 }
347 
348 
349 static void ti_release(struct usb_serial *serial)
350 {
351         struct ti_device *tdev = usb_get_serial_data(serial);
352 
353         kfree(tdev);
354 }
355 
356 static int ti_port_probe(struct usb_serial_port *port)
357 {
358         struct ti_port *tport;
359 
360         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
361         if (!tport)
362                 return -ENOMEM;
363 
364         spin_lock_init(&tport->tp_lock);
365         if (port == port->serial->port[0])
366                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
367         else
368                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
369         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
370         tport->tp_port = port;
371         tport->tp_tdev = usb_get_serial_data(port->serial);
372         tport->tp_uart_mode = 0;        /* default is RS232 */
373 
374         usb_set_serial_port_data(port, tport);
375 
376         port->port.drain_delay = 3;
377 
378         return 0;
379 }
380 
381 static int ti_port_remove(struct usb_serial_port *port)
382 {
383         struct ti_port *tport;
384 
385         tport = usb_get_serial_port_data(port);
386         kfree(tport);
387 
388         return 0;
389 }
390 
391 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
392 {
393         struct ti_port *tport = usb_get_serial_port_data(port);
394         struct ti_device *tdev;
395         struct usb_device *dev;
396         struct urb *urb;
397         int port_number;
398         int status;
399         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
400                              TI_PIPE_TIMEOUT_ENABLE |
401                              (TI_TRANSFER_TIMEOUT << 2));
402 
403         if (tport == NULL)
404                 return -ENODEV;
405 
406         dev = port->serial->dev;
407         tdev = tport->tp_tdev;
408 
409         /* only one open on any port on a device at a time */
410         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
411                 return -ERESTARTSYS;
412 
413         port_number = port->port_number;
414 
415         tport->tp_msr = 0;
416         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
417 
418         /* start interrupt urb the first time a port is opened on this device */
419         if (tdev->td_open_port_count == 0) {
420                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
421                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
422                 if (!urb) {
423                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
424                         status = -EINVAL;
425                         goto release_lock;
426                 }
427                 urb->context = tdev;
428                 status = usb_submit_urb(urb, GFP_KERNEL);
429                 if (status) {
430                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
431                         goto release_lock;
432                 }
433         }
434 
435         if (tty)
436                 ti_set_termios(tty, port, &tty->termios);
437 
438         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
439         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
440                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
441         if (status) {
442                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
443                         __func__, status);
444                 goto unlink_int_urb;
445         }
446 
447         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
448         status = ti_command_out_sync(tdev, TI_START_PORT,
449                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
450         if (status) {
451                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
452                                                         __func__, status);
453                 goto unlink_int_urb;
454         }
455 
456         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
457         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
458                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
459         if (status) {
460                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
461                                                         __func__, status);
462                 goto unlink_int_urb;
463         }
464         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
465                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
466         if (status) {
467                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
468                                                         __func__, status);
469                 goto unlink_int_urb;
470         }
471 
472         /* reset the data toggle on the bulk endpoints to work around bug in
473          * host controllers where things get out of sync some times */
474         usb_clear_halt(dev, port->write_urb->pipe);
475         usb_clear_halt(dev, port->read_urb->pipe);
476 
477         if (tty)
478                 ti_set_termios(tty, port, &tty->termios);
479 
480         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
481         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
482                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
483         if (status) {
484                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
485                                                         __func__, status);
486                 goto unlink_int_urb;
487         }
488 
489         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
490         status = ti_command_out_sync(tdev, TI_START_PORT,
491                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
492         if (status) {
493                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
494                                                         __func__, status);
495                 goto unlink_int_urb;
496         }
497 
498         /* start read urb */
499         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
500         urb = port->read_urb;
501         if (!urb) {
502                 dev_err(&port->dev, "%s - no read urb\n", __func__);
503                 status = -EINVAL;
504                 goto unlink_int_urb;
505         }
506         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
507         urb->context = tport;
508         status = usb_submit_urb(urb, GFP_KERNEL);
509         if (status) {
510                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
511                                                         __func__, status);
512                 goto unlink_int_urb;
513         }
514 
515         tport->tp_is_open = 1;
516         ++tdev->td_open_port_count;
517 
518         goto release_lock;
519 
520 unlink_int_urb:
521         if (tdev->td_open_port_count == 0)
522                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
523 release_lock:
524         mutex_unlock(&tdev->td_open_close_lock);
525         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
526         return status;
527 }
528 
529 
530 static void ti_close(struct usb_serial_port *port)
531 {
532         struct ti_device *tdev;
533         struct ti_port *tport;
534         int port_number;
535         int status;
536         int do_unlock;
537         unsigned long flags;
538 
539         tdev = usb_get_serial_data(port->serial);
540         tport = usb_get_serial_port_data(port);
541         if (tdev == NULL || tport == NULL)
542                 return;
543 
544         tport->tp_is_open = 0;
545 
546         usb_kill_urb(port->read_urb);
547         usb_kill_urb(port->write_urb);
548         tport->tp_write_urb_in_use = 0;
549         spin_lock_irqsave(&tport->tp_lock, flags);
550         kfifo_reset_out(&port->write_fifo);
551         spin_unlock_irqrestore(&tport->tp_lock, flags);
552 
553         port_number = port->port_number;
554 
555         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
556         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
557                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
558         if (status)
559                 dev_err(&port->dev,
560                         "%s - cannot send close port command, %d\n"
561                                                         , __func__, status);
562 
563         /* if mutex_lock is interrupted, continue anyway */
564         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
565         --tport->tp_tdev->td_open_port_count;
566         if (tport->tp_tdev->td_open_port_count <= 0) {
567                 /* last port is closed, shut down interrupt urb */
568                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
569                 tport->tp_tdev->td_open_port_count = 0;
570         }
571         if (do_unlock)
572                 mutex_unlock(&tdev->td_open_close_lock);
573 }
574 
575 
576 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
577                         const unsigned char *data, int count)
578 {
579         struct ti_port *tport = usb_get_serial_port_data(port);
580 
581         if (count == 0) {
582                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
583                 return 0;
584         }
585 
586         if (tport == NULL || !tport->tp_is_open)
587                 return -ENODEV;
588 
589         count = kfifo_in_locked(&port->write_fifo, data, count,
590                                                         &tport->tp_lock);
591         ti_send(tport);
592 
593         return count;
594 }
595 
596 
597 static int ti_write_room(struct tty_struct *tty)
598 {
599         struct usb_serial_port *port = tty->driver_data;
600         struct ti_port *tport = usb_get_serial_port_data(port);
601         int room = 0;
602         unsigned long flags;
603 
604         if (tport == NULL)
605                 return 0;
606 
607         spin_lock_irqsave(&tport->tp_lock, flags);
608         room = kfifo_avail(&port->write_fifo);
609         spin_unlock_irqrestore(&tport->tp_lock, flags);
610 
611         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
612         return room;
613 }
614 
615 
616 static int ti_chars_in_buffer(struct tty_struct *tty)
617 {
618         struct usb_serial_port *port = tty->driver_data;
619         struct ti_port *tport = usb_get_serial_port_data(port);
620         int chars = 0;
621         unsigned long flags;
622 
623         if (tport == NULL)
624                 return 0;
625 
626         spin_lock_irqsave(&tport->tp_lock, flags);
627         chars = kfifo_len(&port->write_fifo);
628         spin_unlock_irqrestore(&tport->tp_lock, flags);
629 
630         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
631         return chars;
632 }
633 
634 static bool ti_tx_empty(struct usb_serial_port *port)
635 {
636         struct ti_port *tport = usb_get_serial_port_data(port);
637         int ret;
638         u8 lsr;
639 
640         ret = ti_get_lsr(tport, &lsr);
641         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
642                 return false;
643 
644         return true;
645 }
646 
647 static void ti_throttle(struct tty_struct *tty)
648 {
649         struct usb_serial_port *port = tty->driver_data;
650         struct ti_port *tport = usb_get_serial_port_data(port);
651 
652         if (tport == NULL)
653                 return;
654 
655         if (I_IXOFF(tty) || C_CRTSCTS(tty))
656                 ti_stop_read(tport, tty);
657 
658 }
659 
660 
661 static void ti_unthrottle(struct tty_struct *tty)
662 {
663         struct usb_serial_port *port = tty->driver_data;
664         struct ti_port *tport = usb_get_serial_port_data(port);
665         int status;
666 
667         if (tport == NULL)
668                 return;
669 
670         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
671                 status = ti_restart_read(tport, tty);
672                 if (status)
673                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
674                                                         __func__, status);
675         }
676 }
677 
678 static int ti_ioctl(struct tty_struct *tty,
679         unsigned int cmd, unsigned long arg)
680 {
681         struct usb_serial_port *port = tty->driver_data;
682         struct ti_port *tport = usb_get_serial_port_data(port);
683 
684         if (tport == NULL)
685                 return -ENODEV;
686 
687         switch (cmd) {
688         case TIOCGSERIAL:
689                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
690                 return ti_get_serial_info(tport,
691                                 (struct serial_struct __user *)arg);
692         case TIOCSSERIAL:
693                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
694                 return ti_set_serial_info(tty, tport,
695                                 (struct serial_struct __user *)arg);
696         }
697         return -ENOIOCTLCMD;
698 }
699 
700 
701 static void ti_set_termios(struct tty_struct *tty,
702                 struct usb_serial_port *port, struct ktermios *old_termios)
703 {
704         struct ti_port *tport = usb_get_serial_port_data(port);
705         struct ti_uart_config *config;
706         tcflag_t cflag, iflag;
707         int baud;
708         int status;
709         int port_number = port->port_number;
710         unsigned int mcr;
711 
712         cflag = tty->termios.c_cflag;
713         iflag = tty->termios.c_iflag;
714 
715         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
716         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
717                 old_termios->c_cflag, old_termios->c_iflag);
718 
719         if (tport == NULL)
720                 return;
721 
722         config = kmalloc(sizeof(*config), GFP_KERNEL);
723         if (!config)
724                 return;
725 
726         config->wFlags = 0;
727 
728         /* these flags must be set */
729         config->wFlags |= TI_UART_ENABLE_MS_INTS;
730         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
731         config->bUartMode = (__u8)(tport->tp_uart_mode);
732 
733         switch (cflag & CSIZE) {
734         case CS5:
735                     config->bDataBits = TI_UART_5_DATA_BITS;
736                     break;
737         case CS6:
738                     config->bDataBits = TI_UART_6_DATA_BITS;
739                     break;
740         case CS7:
741                     config->bDataBits = TI_UART_7_DATA_BITS;
742                     break;
743         default:
744         case CS8:
745                     config->bDataBits = TI_UART_8_DATA_BITS;
746                     break;
747         }
748 
749         /* CMSPAR isn't supported by this driver */
750         tty->termios.c_cflag &= ~CMSPAR;
751 
752         if (cflag & PARENB) {
753                 if (cflag & PARODD) {
754                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
755                         config->bParity = TI_UART_ODD_PARITY;
756                 } else {
757                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
758                         config->bParity = TI_UART_EVEN_PARITY;
759                 }
760         } else {
761                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
762                 config->bParity = TI_UART_NO_PARITY;
763         }
764 
765         if (cflag & CSTOPB)
766                 config->bStopBits = TI_UART_2_STOP_BITS;
767         else
768                 config->bStopBits = TI_UART_1_STOP_BITS;
769 
770         if (cflag & CRTSCTS) {
771                 /* RTS flow control must be off to drop RTS for baud rate B0 */
772                 if ((cflag & CBAUD) != B0)
773                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
774                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
775         } else {
776                 ti_restart_read(tport, tty);
777         }
778 
779         if (I_IXOFF(tty) || I_IXON(tty)) {
780                 config->cXon  = START_CHAR(tty);
781                 config->cXoff = STOP_CHAR(tty);
782 
783                 if (I_IXOFF(tty))
784                         config->wFlags |= TI_UART_ENABLE_X_IN;
785                 else
786                         ti_restart_read(tport, tty);
787 
788                 if (I_IXON(tty))
789                         config->wFlags |= TI_UART_ENABLE_X_OUT;
790         }
791 
792         baud = tty_get_baud_rate(tty);
793         if (!baud)
794                 baud = 9600;
795         if (tport->tp_tdev->td_is_3410)
796                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
797         else
798                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
799 
800         /* FIXME: Should calculate resulting baud here and report it back */
801         if ((cflag & CBAUD) != B0)
802                 tty_encode_baud_rate(tty, baud, baud);
803 
804         dev_dbg(&port->dev,
805                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d\n",
806                 __func__, baud, config->wBaudRate, config->wFlags,
807                 config->bDataBits, config->bParity, config->bStopBits,
808                 config->cXon, config->cXoff, config->bUartMode);
809 
810         cpu_to_be16s(&config->wBaudRate);
811         cpu_to_be16s(&config->wFlags);
812 
813         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
814                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
815                 sizeof(*config));
816         if (status)
817                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
818                                         __func__, port_number, status);
819 
820         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
821         mcr = tport->tp_shadow_mcr;
822         /* if baud rate is B0, clear RTS and DTR */
823         if ((cflag & CBAUD) == B0)
824                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
825         status = ti_set_mcr(tport, mcr);
826         if (status)
827                 dev_err(&port->dev,
828                         "%s - cannot set modem control on port %d, %d\n",
829                                                 __func__, port_number, status);
830 
831         kfree(config);
832 }
833 
834 
835 static int ti_tiocmget(struct tty_struct *tty)
836 {
837         struct usb_serial_port *port = tty->driver_data;
838         struct ti_port *tport = usb_get_serial_port_data(port);
839         unsigned int result;
840         unsigned int msr;
841         unsigned int mcr;
842         unsigned long flags;
843 
844         if (tport == NULL)
845                 return -ENODEV;
846 
847         spin_lock_irqsave(&tport->tp_lock, flags);
848         msr = tport->tp_msr;
849         mcr = tport->tp_shadow_mcr;
850         spin_unlock_irqrestore(&tport->tp_lock, flags);
851 
852         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
853                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
854                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
855                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
856                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
857                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
858                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
859 
860         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
861 
862         return result;
863 }
864 
865 
866 static int ti_tiocmset(struct tty_struct *tty,
867                                 unsigned int set, unsigned int clear)
868 {
869         struct usb_serial_port *port = tty->driver_data;
870         struct ti_port *tport = usb_get_serial_port_data(port);
871         unsigned int mcr;
872         unsigned long flags;
873 
874         if (tport == NULL)
875                 return -ENODEV;
876 
877         spin_lock_irqsave(&tport->tp_lock, flags);
878         mcr = tport->tp_shadow_mcr;
879 
880         if (set & TIOCM_RTS)
881                 mcr |= TI_MCR_RTS;
882         if (set & TIOCM_DTR)
883                 mcr |= TI_MCR_DTR;
884         if (set & TIOCM_LOOP)
885                 mcr |= TI_MCR_LOOP;
886 
887         if (clear & TIOCM_RTS)
888                 mcr &= ~TI_MCR_RTS;
889         if (clear & TIOCM_DTR)
890                 mcr &= ~TI_MCR_DTR;
891         if (clear & TIOCM_LOOP)
892                 mcr &= ~TI_MCR_LOOP;
893         spin_unlock_irqrestore(&tport->tp_lock, flags);
894 
895         return ti_set_mcr(tport, mcr);
896 }
897 
898 
899 static void ti_break(struct tty_struct *tty, int break_state)
900 {
901         struct usb_serial_port *port = tty->driver_data;
902         struct ti_port *tport = usb_get_serial_port_data(port);
903         int status;
904 
905         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
906 
907         if (tport == NULL)
908                 return;
909 
910         status = ti_write_byte(port, tport->tp_tdev,
911                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
912                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
913 
914         if (status)
915                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
916 }
917 
918 
919 static void ti_interrupt_callback(struct urb *urb)
920 {
921         struct ti_device *tdev = urb->context;
922         struct usb_serial_port *port;
923         struct usb_serial *serial = tdev->td_serial;
924         struct ti_port *tport;
925         struct device *dev = &urb->dev->dev;
926         unsigned char *data = urb->transfer_buffer;
927         int length = urb->actual_length;
928         int port_number;
929         int function;
930         int status = urb->status;
931         int retval;
932         __u8 msr;
933 
934         switch (status) {
935         case 0:
936                 break;
937         case -ECONNRESET:
938         case -ENOENT:
939         case -ESHUTDOWN:
940                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
941                 tdev->td_urb_error = 1;
942                 return;
943         default:
944                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
945                 tdev->td_urb_error = 1;
946                 goto exit;
947         }
948 
949         if (length != 2) {
950                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
951                 goto exit;
952         }
953 
954         if (data[0] == TI_CODE_HARDWARE_ERROR) {
955                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
956                 goto exit;
957         }
958 
959         port_number = TI_GET_PORT_FROM_CODE(data[0]);
960         function = TI_GET_FUNC_FROM_CODE(data[0]);
961 
962         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
963                 __func__, port_number, function, data[1]);
964 
965         if (port_number >= serial->num_ports) {
966                 dev_err(dev, "%s - bad port number, %d\n",
967                                                 __func__, port_number);
968                 goto exit;
969         }
970 
971         port = serial->port[port_number];
972 
973         tport = usb_get_serial_port_data(port);
974         if (!tport)
975                 goto exit;
976 
977         switch (function) {
978         case TI_CODE_DATA_ERROR:
979                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
980                         __func__, port_number, data[1]);
981                 break;
982 
983         case TI_CODE_MODEM_STATUS:
984                 msr = data[1];
985                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
986                 ti_handle_new_msr(tport, msr);
987                 break;
988 
989         default:
990                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
991                                                         __func__, data[1]);
992                 break;
993         }
994 
995 exit:
996         retval = usb_submit_urb(urb, GFP_ATOMIC);
997         if (retval)
998                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
999                         __func__, retval);
1000 }
1001 
1002 
1003 static void ti_bulk_in_callback(struct urb *urb)
1004 {
1005         struct ti_port *tport = urb->context;
1006         struct usb_serial_port *port = tport->tp_port;
1007         struct device *dev = &urb->dev->dev;
1008         int status = urb->status;
1009         int retval = 0;
1010 
1011         switch (status) {
1012         case 0:
1013                 break;
1014         case -ECONNRESET:
1015         case -ENOENT:
1016         case -ESHUTDOWN:
1017                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1018                 tport->tp_tdev->td_urb_error = 1;
1019                 return;
1020         default:
1021                 dev_err(dev, "%s - nonzero urb status, %d\n",
1022                         __func__, status);
1023                 tport->tp_tdev->td_urb_error = 1;
1024         }
1025 
1026         if (status == -EPIPE)
1027                 goto exit;
1028 
1029         if (status) {
1030                 dev_err(dev, "%s - stopping read!\n", __func__);
1031                 return;
1032         }
1033 
1034         if (urb->actual_length) {
1035                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1036                                       urb->transfer_buffer);
1037 
1038                 if (!tport->tp_is_open)
1039                         dev_dbg(dev, "%s - port closed, dropping data\n",
1040                                 __func__);
1041                 else
1042                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1043                 spin_lock(&tport->tp_lock);
1044                 port->icount.rx += urb->actual_length;
1045                 spin_unlock(&tport->tp_lock);
1046         }
1047 
1048 exit:
1049         /* continue to read unless stopping */
1050         spin_lock(&tport->tp_lock);
1051         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1052                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1053         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1054                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1055 
1056         spin_unlock(&tport->tp_lock);
1057         if (retval)
1058                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1059                         __func__, retval);
1060 }
1061 
1062 
1063 static void ti_bulk_out_callback(struct urb *urb)
1064 {
1065         struct ti_port *tport = urb->context;
1066         struct usb_serial_port *port = tport->tp_port;
1067         int status = urb->status;
1068 
1069         tport->tp_write_urb_in_use = 0;
1070 
1071         switch (status) {
1072         case 0:
1073                 break;
1074         case -ECONNRESET:
1075         case -ENOENT:
1076         case -ESHUTDOWN:
1077                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1078                 tport->tp_tdev->td_urb_error = 1;
1079                 return;
1080         default:
1081                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1082                         __func__, status);
1083                 tport->tp_tdev->td_urb_error = 1;
1084         }
1085 
1086         /* send any buffered data */
1087         ti_send(tport);
1088 }
1089 
1090 
1091 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1092                 int length)
1093 {
1094         int cnt;
1095 
1096         do {
1097                 cnt = tty_insert_flip_string(&port->port, data, length);
1098                 if (cnt < length) {
1099                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1100                                                 __func__, length - cnt);
1101                         if (cnt == 0)
1102                                 break;
1103                 }
1104                 tty_flip_buffer_push(&port->port);
1105                 data += cnt;
1106                 length -= cnt;
1107         } while (length > 0);
1108 }
1109 
1110 
1111 static void ti_send(struct ti_port *tport)
1112 {
1113         int count, result;
1114         struct usb_serial_port *port = tport->tp_port;
1115         unsigned long flags;
1116 
1117         spin_lock_irqsave(&tport->tp_lock, flags);
1118 
1119         if (tport->tp_write_urb_in_use)
1120                 goto unlock;
1121 
1122         count = kfifo_out(&port->write_fifo,
1123                                 port->write_urb->transfer_buffer,
1124                                 port->bulk_out_size);
1125 
1126         if (count == 0)
1127                 goto unlock;
1128 
1129         tport->tp_write_urb_in_use = 1;
1130 
1131         spin_unlock_irqrestore(&tport->tp_lock, flags);
1132 
1133         usb_serial_debug_data(&port->dev, __func__, count,
1134                               port->write_urb->transfer_buffer);
1135 
1136         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1137                            usb_sndbulkpipe(port->serial->dev,
1138                                             port->bulk_out_endpointAddress),
1139                            port->write_urb->transfer_buffer, count,
1140                            ti_bulk_out_callback, tport);
1141 
1142         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1143         if (result) {
1144                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1145                                                         __func__, result);
1146                 tport->tp_write_urb_in_use = 0;
1147                 /* TODO: reschedule ti_send */
1148         } else {
1149                 spin_lock_irqsave(&tport->tp_lock, flags);
1150                 port->icount.tx += count;
1151                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1152         }
1153 
1154         /* more room in the buffer for new writes, wakeup */
1155         tty_port_tty_wakeup(&port->port);
1156 
1157         return;
1158 unlock:
1159         spin_unlock_irqrestore(&tport->tp_lock, flags);
1160         return;
1161 }
1162 
1163 
1164 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1165 {
1166         unsigned long flags;
1167         int status;
1168 
1169         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1170                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1171                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1172 
1173         spin_lock_irqsave(&tport->tp_lock, flags);
1174         if (!status)
1175                 tport->tp_shadow_mcr = mcr;
1176         spin_unlock_irqrestore(&tport->tp_lock, flags);
1177 
1178         return status;
1179 }
1180 
1181 
1182 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1183 {
1184         int size, status;
1185         struct ti_device *tdev = tport->tp_tdev;
1186         struct usb_serial_port *port = tport->tp_port;
1187         int port_number = port->port_number;
1188         struct ti_port_status *data;
1189 
1190         size = sizeof(struct ti_port_status);
1191         data = kmalloc(size, GFP_KERNEL);
1192         if (!data)
1193                 return -ENOMEM;
1194 
1195         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1196                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1197         if (status) {
1198                 dev_err(&port->dev,
1199                         "%s - get port status command failed, %d\n",
1200                                                         __func__, status);
1201                 goto free_data;
1202         }
1203 
1204         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1205 
1206         *lsr = data->bLSR;
1207 
1208 free_data:
1209         kfree(data);
1210         return status;
1211 }
1212 
1213 
1214 static int ti_get_serial_info(struct ti_port *tport,
1215         struct serial_struct __user *ret_arg)
1216 {
1217         struct usb_serial_port *port = tport->tp_port;
1218         struct serial_struct ret_serial;
1219         unsigned cwait;
1220 
1221         if (!ret_arg)
1222                 return -EFAULT;
1223 
1224         cwait = port->port.closing_wait;
1225         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1226                 cwait = jiffies_to_msecs(cwait) / 10;
1227 
1228         memset(&ret_serial, 0, sizeof(ret_serial));
1229 
1230         ret_serial.type = PORT_16550A;
1231         ret_serial.line = port->minor;
1232         ret_serial.port = port->port_number;
1233         ret_serial.flags = tport->tp_flags;
1234         ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo);
1235         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1236         ret_serial.closing_wait = cwait;
1237 
1238         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1239                 return -EFAULT;
1240 
1241         return 0;
1242 }
1243 
1244 
1245 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1246         struct serial_struct __user *new_arg)
1247 {
1248         struct serial_struct new_serial;
1249         unsigned cwait;
1250 
1251         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1252                 return -EFAULT;
1253 
1254         cwait = new_serial.closing_wait;
1255         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1256                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1257 
1258         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1259         tport->tp_port->port.closing_wait = cwait;
1260 
1261         return 0;
1262 }
1263 
1264 
1265 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1266 {
1267         struct async_icount *icount;
1268         struct tty_struct *tty;
1269         unsigned long flags;
1270 
1271         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1272 
1273         if (msr & TI_MSR_DELTA_MASK) {
1274                 spin_lock_irqsave(&tport->tp_lock, flags);
1275                 icount = &tport->tp_port->icount;
1276                 if (msr & TI_MSR_DELTA_CTS)
1277                         icount->cts++;
1278                 if (msr & TI_MSR_DELTA_DSR)
1279                         icount->dsr++;
1280                 if (msr & TI_MSR_DELTA_CD)
1281                         icount->dcd++;
1282                 if (msr & TI_MSR_DELTA_RI)
1283                         icount->rng++;
1284                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1285                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1286         }
1287 
1288         tport->tp_msr = msr & TI_MSR_MASK;
1289 
1290         /* handle CTS flow control */
1291         tty = tty_port_tty_get(&tport->tp_port->port);
1292         if (tty && C_CRTSCTS(tty)) {
1293                 if (msr & TI_MSR_CTS)
1294                         tty_wakeup(tty);
1295         }
1296         tty_kref_put(tty);
1297 }
1298 
1299 
1300 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1301 {
1302         unsigned long flags;
1303 
1304         spin_lock_irqsave(&tport->tp_lock, flags);
1305 
1306         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1307                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1308 
1309         spin_unlock_irqrestore(&tport->tp_lock, flags);
1310 }
1311 
1312 
1313 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1314 {
1315         struct urb *urb;
1316         int status = 0;
1317         unsigned long flags;
1318 
1319         spin_lock_irqsave(&tport->tp_lock, flags);
1320 
1321         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1322                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1323                 urb = tport->tp_port->read_urb;
1324                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1325                 urb->context = tport;
1326                 status = usb_submit_urb(urb, GFP_KERNEL);
1327         } else  {
1328                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1329                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1330         }
1331 
1332         return status;
1333 }
1334 
1335 
1336 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1337         __u16 moduleid, __u16 value, __u8 *data, int size)
1338 {
1339         int status;
1340 
1341         status = usb_control_msg(tdev->td_serial->dev,
1342                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1343                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1344                 value, moduleid, data, size, 1000);
1345 
1346         if (status == size)
1347                 status = 0;
1348 
1349         if (status > 0)
1350                 status = -ECOMM;
1351 
1352         return status;
1353 }
1354 
1355 
1356 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1357         __u16 moduleid, __u16 value, __u8 *data, int size)
1358 {
1359         int status;
1360 
1361         status = usb_control_msg(tdev->td_serial->dev,
1362                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1363                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1364                 value, moduleid, data, size, 1000);
1365 
1366         if (status == size)
1367                 status = 0;
1368 
1369         if (status > 0)
1370                 status = -ECOMM;
1371 
1372         return status;
1373 }
1374 
1375 
1376 static int ti_write_byte(struct usb_serial_port *port,
1377                         struct ti_device *tdev, unsigned long addr,
1378                         __u8 mask, __u8 byte)
1379 {
1380         int status;
1381         unsigned int size;
1382         struct ti_write_data_bytes *data;
1383 
1384         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1385                 addr, mask, byte);
1386 
1387         size = sizeof(struct ti_write_data_bytes) + 2;
1388         data = kmalloc(size, GFP_KERNEL);
1389         if (!data)
1390                 return -ENOMEM;
1391 
1392         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1393         data->bDataType = TI_RW_DATA_BYTE;
1394         data->bDataCounter = 1;
1395         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1396         data->wBaseAddrLo = cpu_to_be16(addr);
1397         data->bData[0] = mask;
1398         data->bData[1] = byte;
1399 
1400         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1401                 (__u8 *)data, size);
1402 
1403         if (status < 0)
1404                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1405 
1406         kfree(data);
1407 
1408         return status;
1409 }
1410 
1411 static int ti_do_download(struct usb_device *dev, int pipe,
1412                                                 u8 *buffer, int size)
1413 {
1414         int pos;
1415         u8 cs = 0;
1416         int done;
1417         struct ti_firmware_header *header;
1418         int status = 0;
1419         int len;
1420 
1421         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1422                 cs = (__u8)(cs + buffer[pos]);
1423 
1424         header = (struct ti_firmware_header *)buffer;
1425         header->wLength = cpu_to_le16((__u16)(size
1426                                         - sizeof(struct ti_firmware_header)));
1427         header->bCheckSum = cs;
1428 
1429         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1430         for (pos = 0; pos < size; pos += done) {
1431                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1432                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1433                                                                 &done, 1000);
1434                 if (status)
1435                         break;
1436         }
1437         return status;
1438 }
1439 
1440 static int ti_download_firmware(struct ti_device *tdev)
1441 {
1442         int status;
1443         int buffer_size;
1444         __u8 *buffer;
1445         struct usb_device *dev = tdev->td_serial->dev;
1446         unsigned int pipe = usb_sndbulkpipe(dev,
1447                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1448         const struct firmware *fw_p;
1449         char buf[32];
1450 
1451         /* try ID specific firmware first, then try generic firmware */
1452         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1453                         le16_to_cpu(dev->descriptor.idVendor),
1454                         le16_to_cpu(dev->descriptor.idProduct));
1455         status = request_firmware(&fw_p, buf, &dev->dev);
1456 
1457         if (status != 0) {
1458                 buf[0] = '\0';
1459                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1460                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1461                         case MTS_CDMA_PRODUCT_ID:
1462                                 strcpy(buf, "mts_cdma.fw");
1463                                 break;
1464                         case MTS_GSM_PRODUCT_ID:
1465                                 strcpy(buf, "mts_gsm.fw");
1466                                 break;
1467                         case MTS_EDGE_PRODUCT_ID:
1468                                 strcpy(buf, "mts_edge.fw");
1469                                 break;
1470                         case MTS_MT9234MU_PRODUCT_ID:
1471                                 strcpy(buf, "mts_mt9234mu.fw");
1472                                 break;
1473                         case MTS_MT9234ZBA_PRODUCT_ID:
1474                                 strcpy(buf, "mts_mt9234zba.fw");
1475                                 break;
1476                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1477                                 strcpy(buf, "mts_mt9234zba.fw");
1478                                 break;                  }
1479                 }
1480                 if (buf[0] == '\0') {
1481                         if (tdev->td_is_3410)
1482                                 strcpy(buf, "ti_3410.fw");
1483                         else
1484                                 strcpy(buf, "ti_5052.fw");
1485                 }
1486                 status = request_firmware(&fw_p, buf, &dev->dev);
1487         }
1488         if (status) {
1489                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1490                 return -ENOENT;
1491         }
1492         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1493                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1494                 release_firmware(fw_p);
1495                 return -ENOENT;
1496         }
1497 
1498         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1499         buffer = kmalloc(buffer_size, GFP_KERNEL);
1500         if (buffer) {
1501                 memcpy(buffer, fw_p->data, fw_p->size);
1502                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1503                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1504                 kfree(buffer);
1505         } else {
1506                 status = -ENOMEM;
1507         }
1508         release_firmware(fw_p);
1509         if (status) {
1510                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1511                                                         __func__, status);
1512                 return status;
1513         }
1514 
1515         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1516 
1517         return 0;
1518 }
1519 

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