Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4

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         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
163         { }     /* terminator */
164 };
165 
166 static const struct usb_device_id ti_id_table_5052[] = {
167         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
168         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
169         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
170         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
171         { }     /* terminator */
172 };
173 
174 static const struct usb_device_id ti_id_table_combined[] = {
175         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
176         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
177         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
178         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
179         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
180         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
181         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
182         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
183         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
184         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
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         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
190         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
191         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
192         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
193         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
194         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
195         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
196         { }     /* terminator */
197 };
198 
199 static struct usb_serial_driver ti_1port_device = {
200         .driver = {
201                 .owner          = THIS_MODULE,
202                 .name           = "ti_usb_3410_5052_1",
203         },
204         .description            = "TI USB 3410 1 port adapter",
205         .id_table               = ti_id_table_3410,
206         .num_ports              = 1,
207         .attach                 = ti_startup,
208         .release                = ti_release,
209         .port_probe             = ti_port_probe,
210         .port_remove            = ti_port_remove,
211         .open                   = ti_open,
212         .close                  = ti_close,
213         .write                  = ti_write,
214         .write_room             = ti_write_room,
215         .chars_in_buffer        = ti_chars_in_buffer,
216         .tx_empty               = ti_tx_empty,
217         .throttle               = ti_throttle,
218         .unthrottle             = ti_unthrottle,
219         .ioctl                  = ti_ioctl,
220         .set_termios            = ti_set_termios,
221         .tiocmget               = ti_tiocmget,
222         .tiocmset               = ti_tiocmset,
223         .tiocmiwait             = usb_serial_generic_tiocmiwait,
224         .get_icount             = usb_serial_generic_get_icount,
225         .break_ctl              = ti_break,
226         .read_int_callback      = ti_interrupt_callback,
227         .read_bulk_callback     = ti_bulk_in_callback,
228         .write_bulk_callback    = ti_bulk_out_callback,
229 };
230 
231 static struct usb_serial_driver ti_2port_device = {
232         .driver = {
233                 .owner          = THIS_MODULE,
234                 .name           = "ti_usb_3410_5052_2",
235         },
236         .description            = "TI USB 5052 2 port adapter",
237         .id_table               = ti_id_table_5052,
238         .num_ports              = 2,
239         .attach                 = ti_startup,
240         .release                = ti_release,
241         .port_probe             = ti_port_probe,
242         .port_remove            = ti_port_remove,
243         .open                   = ti_open,
244         .close                  = ti_close,
245         .write                  = ti_write,
246         .write_room             = ti_write_room,
247         .chars_in_buffer        = ti_chars_in_buffer,
248         .tx_empty               = ti_tx_empty,
249         .throttle               = ti_throttle,
250         .unthrottle             = ti_unthrottle,
251         .ioctl                  = ti_ioctl,
252         .set_termios            = ti_set_termios,
253         .tiocmget               = ti_tiocmget,
254         .tiocmset               = ti_tiocmset,
255         .tiocmiwait             = usb_serial_generic_tiocmiwait,
256         .get_icount             = usb_serial_generic_get_icount,
257         .break_ctl              = ti_break,
258         .read_int_callback      = ti_interrupt_callback,
259         .read_bulk_callback     = ti_bulk_in_callback,
260         .write_bulk_callback    = ti_bulk_out_callback,
261 };
262 
263 static struct usb_serial_driver * const serial_drivers[] = {
264         &ti_1port_device, &ti_2port_device, NULL
265 };
266 
267 /* Module */
268 
269 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
270 MODULE_DESCRIPTION(TI_DRIVER_DESC);
271 MODULE_LICENSE("GPL");
272 
273 MODULE_FIRMWARE("ti_3410.fw");
274 MODULE_FIRMWARE("ti_5052.fw");
275 MODULE_FIRMWARE("mts_cdma.fw");
276 MODULE_FIRMWARE("mts_gsm.fw");
277 MODULE_FIRMWARE("mts_edge.fw");
278 MODULE_FIRMWARE("mts_mt9234mu.fw");
279 MODULE_FIRMWARE("mts_mt9234zba.fw");
280 
281 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
282 MODULE_PARM_DESC(closing_wait,
283     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
284 
285 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
286 
287 module_usb_serial_driver(serial_drivers, ti_id_table_combined);
288 
289 /* Functions */
290 
291 static int ti_startup(struct usb_serial *serial)
292 {
293         struct ti_device *tdev;
294         struct usb_device *dev = serial->dev;
295         int status;
296 
297         dev_dbg(&dev->dev,
298                 "%s - product 0x%4X, num configurations %d, configuration value %d\n",
299                 __func__, le16_to_cpu(dev->descriptor.idProduct),
300                 dev->descriptor.bNumConfigurations,
301                 dev->actconfig->desc.bConfigurationValue);
302 
303         /* create device structure */
304         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
305         if (!tdev)
306                 return -ENOMEM;
307 
308         mutex_init(&tdev->td_open_close_lock);
309         tdev->td_serial = serial;
310         usb_set_serial_data(serial, tdev);
311 
312         /* determine device type */
313         if (serial->type == &ti_1port_device)
314                 tdev->td_is_3410 = 1;
315         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
316                 tdev->td_is_3410 ? "3410" : "5052");
317 
318         /* if we have only 1 configuration, download firmware */
319         if (dev->descriptor.bNumConfigurations == 1) {
320                 status = ti_download_firmware(tdev);
321 
322                 if (status != 0)
323                         goto free_tdev;
324 
325                 /* 3410 must be reset, 5052 resets itself */
326                 if (tdev->td_is_3410) {
327                         msleep_interruptible(100);
328                         usb_reset_device(dev);
329                 }
330 
331                 status = -ENODEV;
332                 goto free_tdev;
333         }
334 
335         /* the second configuration must be set */
336         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
337                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
338                 status = status ? status : -ENODEV;
339                 goto free_tdev;
340         }
341 
342         return 0;
343 
344 free_tdev:
345         kfree(tdev);
346         usb_set_serial_data(serial, NULL);
347         return status;
348 }
349 
350 
351 static void ti_release(struct usb_serial *serial)
352 {
353         struct ti_device *tdev = usb_get_serial_data(serial);
354 
355         kfree(tdev);
356 }
357 
358 static int ti_port_probe(struct usb_serial_port *port)
359 {
360         struct ti_port *tport;
361 
362         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
363         if (!tport)
364                 return -ENOMEM;
365 
366         spin_lock_init(&tport->tp_lock);
367         if (port == port->serial->port[0])
368                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
369         else
370                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
371         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
372         tport->tp_port = port;
373         tport->tp_tdev = usb_get_serial_data(port->serial);
374         tport->tp_uart_mode = 0;        /* default is RS232 */
375 
376         usb_set_serial_port_data(port, tport);
377 
378         port->port.drain_delay = 3;
379 
380         return 0;
381 }
382 
383 static int ti_port_remove(struct usb_serial_port *port)
384 {
385         struct ti_port *tport;
386 
387         tport = usb_get_serial_port_data(port);
388         kfree(tport);
389 
390         return 0;
391 }
392 
393 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
394 {
395         struct ti_port *tport = usb_get_serial_port_data(port);
396         struct ti_device *tdev;
397         struct usb_device *dev;
398         struct urb *urb;
399         int port_number;
400         int status;
401         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
402                              TI_PIPE_TIMEOUT_ENABLE |
403                              (TI_TRANSFER_TIMEOUT << 2));
404 
405         if (tport == NULL)
406                 return -ENODEV;
407 
408         dev = port->serial->dev;
409         tdev = tport->tp_tdev;
410 
411         /* only one open on any port on a device at a time */
412         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
413                 return -ERESTARTSYS;
414 
415         port_number = port->port_number;
416 
417         tport->tp_msr = 0;
418         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
419 
420         /* start interrupt urb the first time a port is opened on this device */
421         if (tdev->td_open_port_count == 0) {
422                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
423                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
424                 if (!urb) {
425                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
426                         status = -EINVAL;
427                         goto release_lock;
428                 }
429                 urb->context = tdev;
430                 status = usb_submit_urb(urb, GFP_KERNEL);
431                 if (status) {
432                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
433                         goto release_lock;
434                 }
435         }
436 
437         if (tty)
438                 ti_set_termios(tty, port, &tty->termios);
439 
440         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
441         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
442                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
443         if (status) {
444                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
445                         __func__, status);
446                 goto unlink_int_urb;
447         }
448 
449         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
450         status = ti_command_out_sync(tdev, TI_START_PORT,
451                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
452         if (status) {
453                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
454                                                         __func__, status);
455                 goto unlink_int_urb;
456         }
457 
458         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
459         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
460                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
461         if (status) {
462                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
463                                                         __func__, status);
464                 goto unlink_int_urb;
465         }
466         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
467                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
468         if (status) {
469                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
470                                                         __func__, status);
471                 goto unlink_int_urb;
472         }
473 
474         /* reset the data toggle on the bulk endpoints to work around bug in
475          * host controllers where things get out of sync some times */
476         usb_clear_halt(dev, port->write_urb->pipe);
477         usb_clear_halt(dev, port->read_urb->pipe);
478 
479         if (tty)
480                 ti_set_termios(tty, port, &tty->termios);
481 
482         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
483         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
484                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
485         if (status) {
486                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
487                                                         __func__, status);
488                 goto unlink_int_urb;
489         }
490 
491         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
492         status = ti_command_out_sync(tdev, TI_START_PORT,
493                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
494         if (status) {
495                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
496                                                         __func__, status);
497                 goto unlink_int_urb;
498         }
499 
500         /* start read urb */
501         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
502         urb = port->read_urb;
503         if (!urb) {
504                 dev_err(&port->dev, "%s - no read urb\n", __func__);
505                 status = -EINVAL;
506                 goto unlink_int_urb;
507         }
508         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
509         urb->context = tport;
510         status = usb_submit_urb(urb, GFP_KERNEL);
511         if (status) {
512                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
513                                                         __func__, status);
514                 goto unlink_int_urb;
515         }
516 
517         tport->tp_is_open = 1;
518         ++tdev->td_open_port_count;
519 
520         goto release_lock;
521 
522 unlink_int_urb:
523         if (tdev->td_open_port_count == 0)
524                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
525 release_lock:
526         mutex_unlock(&tdev->td_open_close_lock);
527         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
528         return status;
529 }
530 
531 
532 static void ti_close(struct usb_serial_port *port)
533 {
534         struct ti_device *tdev;
535         struct ti_port *tport;
536         int port_number;
537         int status;
538         int do_unlock;
539         unsigned long flags;
540 
541         tdev = usb_get_serial_data(port->serial);
542         tport = usb_get_serial_port_data(port);
543         if (tdev == NULL || tport == NULL)
544                 return;
545 
546         tport->tp_is_open = 0;
547 
548         usb_kill_urb(port->read_urb);
549         usb_kill_urb(port->write_urb);
550         tport->tp_write_urb_in_use = 0;
551         spin_lock_irqsave(&tport->tp_lock, flags);
552         kfifo_reset_out(&port->write_fifo);
553         spin_unlock_irqrestore(&tport->tp_lock, flags);
554 
555         port_number = port->port_number;
556 
557         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
558         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
559                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
560         if (status)
561                 dev_err(&port->dev,
562                         "%s - cannot send close port command, %d\n"
563                                                         , __func__, status);
564 
565         /* if mutex_lock is interrupted, continue anyway */
566         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
567         --tport->tp_tdev->td_open_port_count;
568         if (tport->tp_tdev->td_open_port_count <= 0) {
569                 /* last port is closed, shut down interrupt urb */
570                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
571                 tport->tp_tdev->td_open_port_count = 0;
572         }
573         if (do_unlock)
574                 mutex_unlock(&tdev->td_open_close_lock);
575 }
576 
577 
578 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
579                         const unsigned char *data, int count)
580 {
581         struct ti_port *tport = usb_get_serial_port_data(port);
582 
583         if (count == 0) {
584                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
585                 return 0;
586         }
587 
588         if (tport == NULL || !tport->tp_is_open)
589                 return -ENODEV;
590 
591         count = kfifo_in_locked(&port->write_fifo, data, count,
592                                                         &tport->tp_lock);
593         ti_send(tport);
594 
595         return count;
596 }
597 
598 
599 static int ti_write_room(struct tty_struct *tty)
600 {
601         struct usb_serial_port *port = tty->driver_data;
602         struct ti_port *tport = usb_get_serial_port_data(port);
603         int room = 0;
604         unsigned long flags;
605 
606         if (tport == NULL)
607                 return 0;
608 
609         spin_lock_irqsave(&tport->tp_lock, flags);
610         room = kfifo_avail(&port->write_fifo);
611         spin_unlock_irqrestore(&tport->tp_lock, flags);
612 
613         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
614         return room;
615 }
616 
617 
618 static int ti_chars_in_buffer(struct tty_struct *tty)
619 {
620         struct usb_serial_port *port = tty->driver_data;
621         struct ti_port *tport = usb_get_serial_port_data(port);
622         int chars = 0;
623         unsigned long flags;
624 
625         if (tport == NULL)
626                 return 0;
627 
628         spin_lock_irqsave(&tport->tp_lock, flags);
629         chars = kfifo_len(&port->write_fifo);
630         spin_unlock_irqrestore(&tport->tp_lock, flags);
631 
632         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
633         return chars;
634 }
635 
636 static bool ti_tx_empty(struct usb_serial_port *port)
637 {
638         struct ti_port *tport = usb_get_serial_port_data(port);
639         int ret;
640         u8 lsr;
641 
642         ret = ti_get_lsr(tport, &lsr);
643         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
644                 return false;
645 
646         return true;
647 }
648 
649 static void ti_throttle(struct tty_struct *tty)
650 {
651         struct usb_serial_port *port = tty->driver_data;
652         struct ti_port *tport = usb_get_serial_port_data(port);
653 
654         if (tport == NULL)
655                 return;
656 
657         if (I_IXOFF(tty) || C_CRTSCTS(tty))
658                 ti_stop_read(tport, tty);
659 
660 }
661 
662 
663 static void ti_unthrottle(struct tty_struct *tty)
664 {
665         struct usb_serial_port *port = tty->driver_data;
666         struct ti_port *tport = usb_get_serial_port_data(port);
667         int status;
668 
669         if (tport == NULL)
670                 return;
671 
672         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
673                 status = ti_restart_read(tport, tty);
674                 if (status)
675                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
676                                                         __func__, status);
677         }
678 }
679 
680 static int ti_ioctl(struct tty_struct *tty,
681         unsigned int cmd, unsigned long arg)
682 {
683         struct usb_serial_port *port = tty->driver_data;
684         struct ti_port *tport = usb_get_serial_port_data(port);
685 
686         if (tport == NULL)
687                 return -ENODEV;
688 
689         switch (cmd) {
690         case TIOCGSERIAL:
691                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
692                 return ti_get_serial_info(tport,
693                                 (struct serial_struct __user *)arg);
694         case TIOCSSERIAL:
695                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
696                 return ti_set_serial_info(tty, tport,
697                                 (struct serial_struct __user *)arg);
698         }
699         return -ENOIOCTLCMD;
700 }
701 
702 
703 static void ti_set_termios(struct tty_struct *tty,
704                 struct usb_serial_port *port, struct ktermios *old_termios)
705 {
706         struct ti_port *tport = usb_get_serial_port_data(port);
707         struct ti_uart_config *config;
708         tcflag_t cflag, iflag;
709         int baud;
710         int status;
711         int port_number = port->port_number;
712         unsigned int mcr;
713 
714         cflag = tty->termios.c_cflag;
715         iflag = tty->termios.c_iflag;
716 
717         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
718         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
719                 old_termios->c_cflag, old_termios->c_iflag);
720 
721         if (tport == NULL)
722                 return;
723 
724         config = kmalloc(sizeof(*config), GFP_KERNEL);
725         if (!config)
726                 return;
727 
728         config->wFlags = 0;
729 
730         /* these flags must be set */
731         config->wFlags |= TI_UART_ENABLE_MS_INTS;
732         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
733         config->bUartMode = (__u8)(tport->tp_uart_mode);
734 
735         switch (cflag & CSIZE) {
736         case CS5:
737                     config->bDataBits = TI_UART_5_DATA_BITS;
738                     break;
739         case CS6:
740                     config->bDataBits = TI_UART_6_DATA_BITS;
741                     break;
742         case CS7:
743                     config->bDataBits = TI_UART_7_DATA_BITS;
744                     break;
745         default:
746         case CS8:
747                     config->bDataBits = TI_UART_8_DATA_BITS;
748                     break;
749         }
750 
751         /* CMSPAR isn't supported by this driver */
752         tty->termios.c_cflag &= ~CMSPAR;
753 
754         if (cflag & PARENB) {
755                 if (cflag & PARODD) {
756                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
757                         config->bParity = TI_UART_ODD_PARITY;
758                 } else {
759                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
760                         config->bParity = TI_UART_EVEN_PARITY;
761                 }
762         } else {
763                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
764                 config->bParity = TI_UART_NO_PARITY;
765         }
766 
767         if (cflag & CSTOPB)
768                 config->bStopBits = TI_UART_2_STOP_BITS;
769         else
770                 config->bStopBits = TI_UART_1_STOP_BITS;
771 
772         if (cflag & CRTSCTS) {
773                 /* RTS flow control must be off to drop RTS for baud rate B0 */
774                 if ((cflag & CBAUD) != B0)
775                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
776                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
777         } else {
778                 ti_restart_read(tport, tty);
779         }
780 
781         if (I_IXOFF(tty) || I_IXON(tty)) {
782                 config->cXon  = START_CHAR(tty);
783                 config->cXoff = STOP_CHAR(tty);
784 
785                 if (I_IXOFF(tty))
786                         config->wFlags |= TI_UART_ENABLE_X_IN;
787                 else
788                         ti_restart_read(tport, tty);
789 
790                 if (I_IXON(tty))
791                         config->wFlags |= TI_UART_ENABLE_X_OUT;
792         }
793 
794         baud = tty_get_baud_rate(tty);
795         if (!baud)
796                 baud = 9600;
797         if (tport->tp_tdev->td_is_3410)
798                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
799         else
800                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
801 
802         /* FIXME: Should calculate resulting baud here and report it back */
803         if ((cflag & CBAUD) != B0)
804                 tty_encode_baud_rate(tty, baud, baud);
805 
806         dev_dbg(&port->dev,
807                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d\n",
808                 __func__, baud, config->wBaudRate, config->wFlags,
809                 config->bDataBits, config->bParity, config->bStopBits,
810                 config->cXon, config->cXoff, config->bUartMode);
811 
812         cpu_to_be16s(&config->wBaudRate);
813         cpu_to_be16s(&config->wFlags);
814 
815         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
816                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
817                 sizeof(*config));
818         if (status)
819                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
820                                         __func__, port_number, status);
821 
822         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
823         mcr = tport->tp_shadow_mcr;
824         /* if baud rate is B0, clear RTS and DTR */
825         if ((cflag & CBAUD) == B0)
826                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
827         status = ti_set_mcr(tport, mcr);
828         if (status)
829                 dev_err(&port->dev,
830                         "%s - cannot set modem control on port %d, %d\n",
831                                                 __func__, port_number, status);
832 
833         kfree(config);
834 }
835 
836 
837 static int ti_tiocmget(struct tty_struct *tty)
838 {
839         struct usb_serial_port *port = tty->driver_data;
840         struct ti_port *tport = usb_get_serial_port_data(port);
841         unsigned int result;
842         unsigned int msr;
843         unsigned int mcr;
844         unsigned long flags;
845 
846         if (tport == NULL)
847                 return -ENODEV;
848 
849         spin_lock_irqsave(&tport->tp_lock, flags);
850         msr = tport->tp_msr;
851         mcr = tport->tp_shadow_mcr;
852         spin_unlock_irqrestore(&tport->tp_lock, flags);
853 
854         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
855                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
856                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
857                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
858                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
859                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
860                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
861 
862         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
863 
864         return result;
865 }
866 
867 
868 static int ti_tiocmset(struct tty_struct *tty,
869                                 unsigned int set, unsigned int clear)
870 {
871         struct usb_serial_port *port = tty->driver_data;
872         struct ti_port *tport = usb_get_serial_port_data(port);
873         unsigned int mcr;
874         unsigned long flags;
875 
876         if (tport == NULL)
877                 return -ENODEV;
878 
879         spin_lock_irqsave(&tport->tp_lock, flags);
880         mcr = tport->tp_shadow_mcr;
881 
882         if (set & TIOCM_RTS)
883                 mcr |= TI_MCR_RTS;
884         if (set & TIOCM_DTR)
885                 mcr |= TI_MCR_DTR;
886         if (set & TIOCM_LOOP)
887                 mcr |= TI_MCR_LOOP;
888 
889         if (clear & TIOCM_RTS)
890                 mcr &= ~TI_MCR_RTS;
891         if (clear & TIOCM_DTR)
892                 mcr &= ~TI_MCR_DTR;
893         if (clear & TIOCM_LOOP)
894                 mcr &= ~TI_MCR_LOOP;
895         spin_unlock_irqrestore(&tport->tp_lock, flags);
896 
897         return ti_set_mcr(tport, mcr);
898 }
899 
900 
901 static void ti_break(struct tty_struct *tty, int break_state)
902 {
903         struct usb_serial_port *port = tty->driver_data;
904         struct ti_port *tport = usb_get_serial_port_data(port);
905         int status;
906 
907         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
908 
909         if (tport == NULL)
910                 return;
911 
912         status = ti_write_byte(port, tport->tp_tdev,
913                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
914                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
915 
916         if (status)
917                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
918 }
919 
920 
921 static void ti_interrupt_callback(struct urb *urb)
922 {
923         struct ti_device *tdev = urb->context;
924         struct usb_serial_port *port;
925         struct usb_serial *serial = tdev->td_serial;
926         struct ti_port *tport;
927         struct device *dev = &urb->dev->dev;
928         unsigned char *data = urb->transfer_buffer;
929         int length = urb->actual_length;
930         int port_number;
931         int function;
932         int status = urb->status;
933         int retval;
934         __u8 msr;
935 
936         switch (status) {
937         case 0:
938                 break;
939         case -ECONNRESET:
940         case -ENOENT:
941         case -ESHUTDOWN:
942                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
943                 tdev->td_urb_error = 1;
944                 return;
945         default:
946                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
947                 tdev->td_urb_error = 1;
948                 goto exit;
949         }
950 
951         if (length != 2) {
952                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
953                 goto exit;
954         }
955 
956         if (data[0] == TI_CODE_HARDWARE_ERROR) {
957                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
958                 goto exit;
959         }
960 
961         port_number = TI_GET_PORT_FROM_CODE(data[0]);
962         function = TI_GET_FUNC_FROM_CODE(data[0]);
963 
964         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
965                 __func__, port_number, function, data[1]);
966 
967         if (port_number >= serial->num_ports) {
968                 dev_err(dev, "%s - bad port number, %d\n",
969                                                 __func__, port_number);
970                 goto exit;
971         }
972 
973         port = serial->port[port_number];
974 
975         tport = usb_get_serial_port_data(port);
976         if (!tport)
977                 goto exit;
978 
979         switch (function) {
980         case TI_CODE_DATA_ERROR:
981                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
982                         __func__, port_number, data[1]);
983                 break;
984 
985         case TI_CODE_MODEM_STATUS:
986                 msr = data[1];
987                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
988                 ti_handle_new_msr(tport, msr);
989                 break;
990 
991         default:
992                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
993                                                         __func__, data[1]);
994                 break;
995         }
996 
997 exit:
998         retval = usb_submit_urb(urb, GFP_ATOMIC);
999         if (retval)
1000                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1001                         __func__, retval);
1002 }
1003 
1004 
1005 static void ti_bulk_in_callback(struct urb *urb)
1006 {
1007         struct ti_port *tport = urb->context;
1008         struct usb_serial_port *port = tport->tp_port;
1009         struct device *dev = &urb->dev->dev;
1010         int status = urb->status;
1011         int retval = 0;
1012 
1013         switch (status) {
1014         case 0:
1015                 break;
1016         case -ECONNRESET:
1017         case -ENOENT:
1018         case -ESHUTDOWN:
1019                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1020                 tport->tp_tdev->td_urb_error = 1;
1021                 return;
1022         default:
1023                 dev_err(dev, "%s - nonzero urb status, %d\n",
1024                         __func__, status);
1025                 tport->tp_tdev->td_urb_error = 1;
1026         }
1027 
1028         if (status == -EPIPE)
1029                 goto exit;
1030 
1031         if (status) {
1032                 dev_err(dev, "%s - stopping read!\n", __func__);
1033                 return;
1034         }
1035 
1036         if (urb->actual_length) {
1037                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1038                                       urb->transfer_buffer);
1039 
1040                 if (!tport->tp_is_open)
1041                         dev_dbg(dev, "%s - port closed, dropping data\n",
1042                                 __func__);
1043                 else
1044                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1045                 spin_lock(&tport->tp_lock);
1046                 port->icount.rx += urb->actual_length;
1047                 spin_unlock(&tport->tp_lock);
1048         }
1049 
1050 exit:
1051         /* continue to read unless stopping */
1052         spin_lock(&tport->tp_lock);
1053         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1054                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1055         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1056                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1057 
1058         spin_unlock(&tport->tp_lock);
1059         if (retval)
1060                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1061                         __func__, retval);
1062 }
1063 
1064 
1065 static void ti_bulk_out_callback(struct urb *urb)
1066 {
1067         struct ti_port *tport = urb->context;
1068         struct usb_serial_port *port = tport->tp_port;
1069         int status = urb->status;
1070 
1071         tport->tp_write_urb_in_use = 0;
1072 
1073         switch (status) {
1074         case 0:
1075                 break;
1076         case -ECONNRESET:
1077         case -ENOENT:
1078         case -ESHUTDOWN:
1079                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1080                 tport->tp_tdev->td_urb_error = 1;
1081                 return;
1082         default:
1083                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1084                         __func__, status);
1085                 tport->tp_tdev->td_urb_error = 1;
1086         }
1087 
1088         /* send any buffered data */
1089         ti_send(tport);
1090 }
1091 
1092 
1093 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1094                 int length)
1095 {
1096         int cnt;
1097 
1098         do {
1099                 cnt = tty_insert_flip_string(&port->port, data, length);
1100                 if (cnt < length) {
1101                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1102                                                 __func__, length - cnt);
1103                         if (cnt == 0)
1104                                 break;
1105                 }
1106                 tty_flip_buffer_push(&port->port);
1107                 data += cnt;
1108                 length -= cnt;
1109         } while (length > 0);
1110 }
1111 
1112 
1113 static void ti_send(struct ti_port *tport)
1114 {
1115         int count, result;
1116         struct usb_serial_port *port = tport->tp_port;
1117         unsigned long flags;
1118 
1119         spin_lock_irqsave(&tport->tp_lock, flags);
1120 
1121         if (tport->tp_write_urb_in_use)
1122                 goto unlock;
1123 
1124         count = kfifo_out(&port->write_fifo,
1125                                 port->write_urb->transfer_buffer,
1126                                 port->bulk_out_size);
1127 
1128         if (count == 0)
1129                 goto unlock;
1130 
1131         tport->tp_write_urb_in_use = 1;
1132 
1133         spin_unlock_irqrestore(&tport->tp_lock, flags);
1134 
1135         usb_serial_debug_data(&port->dev, __func__, count,
1136                               port->write_urb->transfer_buffer);
1137 
1138         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1139                            usb_sndbulkpipe(port->serial->dev,
1140                                             port->bulk_out_endpointAddress),
1141                            port->write_urb->transfer_buffer, count,
1142                            ti_bulk_out_callback, tport);
1143 
1144         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1145         if (result) {
1146                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1147                                                         __func__, result);
1148                 tport->tp_write_urb_in_use = 0;
1149                 /* TODO: reschedule ti_send */
1150         } else {
1151                 spin_lock_irqsave(&tport->tp_lock, flags);
1152                 port->icount.tx += count;
1153                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1154         }
1155 
1156         /* more room in the buffer for new writes, wakeup */
1157         tty_port_tty_wakeup(&port->port);
1158 
1159         return;
1160 unlock:
1161         spin_unlock_irqrestore(&tport->tp_lock, flags);
1162         return;
1163 }
1164 
1165 
1166 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1167 {
1168         unsigned long flags;
1169         int status;
1170 
1171         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1172                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1173                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1174 
1175         spin_lock_irqsave(&tport->tp_lock, flags);
1176         if (!status)
1177                 tport->tp_shadow_mcr = mcr;
1178         spin_unlock_irqrestore(&tport->tp_lock, flags);
1179 
1180         return status;
1181 }
1182 
1183 
1184 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1185 {
1186         int size, status;
1187         struct ti_device *tdev = tport->tp_tdev;
1188         struct usb_serial_port *port = tport->tp_port;
1189         int port_number = port->port_number;
1190         struct ti_port_status *data;
1191 
1192         size = sizeof(struct ti_port_status);
1193         data = kmalloc(size, GFP_KERNEL);
1194         if (!data)
1195                 return -ENOMEM;
1196 
1197         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1198                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1199         if (status) {
1200                 dev_err(&port->dev,
1201                         "%s - get port status command failed, %d\n",
1202                                                         __func__, status);
1203                 goto free_data;
1204         }
1205 
1206         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1207 
1208         *lsr = data->bLSR;
1209 
1210 free_data:
1211         kfree(data);
1212         return status;
1213 }
1214 
1215 
1216 static int ti_get_serial_info(struct ti_port *tport,
1217         struct serial_struct __user *ret_arg)
1218 {
1219         struct usb_serial_port *port = tport->tp_port;
1220         struct serial_struct ret_serial;
1221         unsigned cwait;
1222 
1223         if (!ret_arg)
1224                 return -EFAULT;
1225 
1226         cwait = port->port.closing_wait;
1227         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1228                 cwait = jiffies_to_msecs(cwait) / 10;
1229 
1230         memset(&ret_serial, 0, sizeof(ret_serial));
1231 
1232         ret_serial.type = PORT_16550A;
1233         ret_serial.line = port->minor;
1234         ret_serial.port = port->port_number;
1235         ret_serial.flags = tport->tp_flags;
1236         ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo);
1237         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1238         ret_serial.closing_wait = cwait;
1239 
1240         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1241                 return -EFAULT;
1242 
1243         return 0;
1244 }
1245 
1246 
1247 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1248         struct serial_struct __user *new_arg)
1249 {
1250         struct serial_struct new_serial;
1251         unsigned cwait;
1252 
1253         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1254                 return -EFAULT;
1255 
1256         cwait = new_serial.closing_wait;
1257         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1258                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1259 
1260         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1261         tport->tp_port->port.closing_wait = cwait;
1262 
1263         return 0;
1264 }
1265 
1266 
1267 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1268 {
1269         struct async_icount *icount;
1270         struct tty_struct *tty;
1271         unsigned long flags;
1272 
1273         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1274 
1275         if (msr & TI_MSR_DELTA_MASK) {
1276                 spin_lock_irqsave(&tport->tp_lock, flags);
1277                 icount = &tport->tp_port->icount;
1278                 if (msr & TI_MSR_DELTA_CTS)
1279                         icount->cts++;
1280                 if (msr & TI_MSR_DELTA_DSR)
1281                         icount->dsr++;
1282                 if (msr & TI_MSR_DELTA_CD)
1283                         icount->dcd++;
1284                 if (msr & TI_MSR_DELTA_RI)
1285                         icount->rng++;
1286                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1287                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1288         }
1289 
1290         tport->tp_msr = msr & TI_MSR_MASK;
1291 
1292         /* handle CTS flow control */
1293         tty = tty_port_tty_get(&tport->tp_port->port);
1294         if (tty && C_CRTSCTS(tty)) {
1295                 if (msr & TI_MSR_CTS)
1296                         tty_wakeup(tty);
1297         }
1298         tty_kref_put(tty);
1299 }
1300 
1301 
1302 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1303 {
1304         unsigned long flags;
1305 
1306         spin_lock_irqsave(&tport->tp_lock, flags);
1307 
1308         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1309                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1310 
1311         spin_unlock_irqrestore(&tport->tp_lock, flags);
1312 }
1313 
1314 
1315 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1316 {
1317         struct urb *urb;
1318         int status = 0;
1319         unsigned long flags;
1320 
1321         spin_lock_irqsave(&tport->tp_lock, flags);
1322 
1323         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1324                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1325                 urb = tport->tp_port->read_urb;
1326                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1327                 urb->context = tport;
1328                 status = usb_submit_urb(urb, GFP_KERNEL);
1329         } else  {
1330                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1331                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1332         }
1333 
1334         return status;
1335 }
1336 
1337 
1338 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1339         __u16 moduleid, __u16 value, __u8 *data, int size)
1340 {
1341         int status;
1342 
1343         status = usb_control_msg(tdev->td_serial->dev,
1344                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1345                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1346                 value, moduleid, data, size, 1000);
1347 
1348         if (status == size)
1349                 status = 0;
1350 
1351         if (status > 0)
1352                 status = -ECOMM;
1353 
1354         return status;
1355 }
1356 
1357 
1358 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1359         __u16 moduleid, __u16 value, __u8 *data, int size)
1360 {
1361         int status;
1362 
1363         status = usb_control_msg(tdev->td_serial->dev,
1364                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1365                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1366                 value, moduleid, data, size, 1000);
1367 
1368         if (status == size)
1369                 status = 0;
1370 
1371         if (status > 0)
1372                 status = -ECOMM;
1373 
1374         return status;
1375 }
1376 
1377 
1378 static int ti_write_byte(struct usb_serial_port *port,
1379                         struct ti_device *tdev, unsigned long addr,
1380                         __u8 mask, __u8 byte)
1381 {
1382         int status;
1383         unsigned int size;
1384         struct ti_write_data_bytes *data;
1385 
1386         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1387                 addr, mask, byte);
1388 
1389         size = sizeof(struct ti_write_data_bytes) + 2;
1390         data = kmalloc(size, GFP_KERNEL);
1391         if (!data)
1392                 return -ENOMEM;
1393 
1394         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1395         data->bDataType = TI_RW_DATA_BYTE;
1396         data->bDataCounter = 1;
1397         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1398         data->wBaseAddrLo = cpu_to_be16(addr);
1399         data->bData[0] = mask;
1400         data->bData[1] = byte;
1401 
1402         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1403                 (__u8 *)data, size);
1404 
1405         if (status < 0)
1406                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1407 
1408         kfree(data);
1409 
1410         return status;
1411 }
1412 
1413 static int ti_do_download(struct usb_device *dev, int pipe,
1414                                                 u8 *buffer, int size)
1415 {
1416         int pos;
1417         u8 cs = 0;
1418         int done;
1419         struct ti_firmware_header *header;
1420         int status = 0;
1421         int len;
1422 
1423         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1424                 cs = (__u8)(cs + buffer[pos]);
1425 
1426         header = (struct ti_firmware_header *)buffer;
1427         header->wLength = cpu_to_le16((__u16)(size
1428                                         - sizeof(struct ti_firmware_header)));
1429         header->bCheckSum = cs;
1430 
1431         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1432         for (pos = 0; pos < size; pos += done) {
1433                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1434                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1435                                                                 &done, 1000);
1436                 if (status)
1437                         break;
1438         }
1439         return status;
1440 }
1441 
1442 static int ti_download_firmware(struct ti_device *tdev)
1443 {
1444         int status;
1445         int buffer_size;
1446         __u8 *buffer;
1447         struct usb_device *dev = tdev->td_serial->dev;
1448         unsigned int pipe = usb_sndbulkpipe(dev,
1449                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1450         const struct firmware *fw_p;
1451         char buf[32];
1452 
1453         /* try ID specific firmware first, then try generic firmware */
1454         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1455                         le16_to_cpu(dev->descriptor.idVendor),
1456                         le16_to_cpu(dev->descriptor.idProduct));
1457         status = request_firmware(&fw_p, buf, &dev->dev);
1458 
1459         if (status != 0) {
1460                 buf[0] = '\0';
1461                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1462                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1463                         case MTS_CDMA_PRODUCT_ID:
1464                                 strcpy(buf, "mts_cdma.fw");
1465                                 break;
1466                         case MTS_GSM_PRODUCT_ID:
1467                                 strcpy(buf, "mts_gsm.fw");
1468                                 break;
1469                         case MTS_EDGE_PRODUCT_ID:
1470                                 strcpy(buf, "mts_edge.fw");
1471                                 break;
1472                         case MTS_MT9234MU_PRODUCT_ID:
1473                                 strcpy(buf, "mts_mt9234mu.fw");
1474                                 break;
1475                         case MTS_MT9234ZBA_PRODUCT_ID:
1476                                 strcpy(buf, "mts_mt9234zba.fw");
1477                                 break;
1478                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1479                                 strcpy(buf, "mts_mt9234zba.fw");
1480                                 break;                  }
1481                 }
1482                 if (buf[0] == '\0') {
1483                         if (tdev->td_is_3410)
1484                                 strcpy(buf, "ti_3410.fw");
1485                         else
1486                                 strcpy(buf, "ti_5052.fw");
1487                 }
1488                 status = request_firmware(&fw_p, buf, &dev->dev);
1489         }
1490         if (status) {
1491                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1492                 return -ENOENT;
1493         }
1494         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1495                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1496                 release_firmware(fw_p);
1497                 return -ENOENT;
1498         }
1499 
1500         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1501         buffer = kmalloc(buffer_size, GFP_KERNEL);
1502         if (buffer) {
1503                 memcpy(buffer, fw_p->data, fw_p->size);
1504                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1505                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1506                 kfree(buffer);
1507         } else {
1508                 status = -ENOMEM;
1509         }
1510         release_firmware(fw_p);
1511         if (status) {
1512                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1513                                                         __func__, status);
1514                 return status;
1515         }
1516 
1517         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1518 
1519         return 0;
1520 }
1521 

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