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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/nico/orion...
[deliverable/linux.git] / 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/init.h>
25 #include <linux/slab.h>
26 #include <linux/tty.h>
27 #include <linux/tty_driver.h>
28 #include <linux/tty_flip.h>
29 #include <linux/module.h>
30 #include <linux/spinlock.h>
31 #include <linux/ioctl.h>
32 #include <linux/serial.h>
33 #include <linux/circ_buf.h>
34 #include <linux/mutex.h>
35 #include <linux/uaccess.h>
36 #include <linux/usb.h>
37 #include <linux/usb/serial.h>
38
39 #include "ti_usb_3410_5052.h"
40
41 /* Defines */
42
43 #define TI_DRIVER_VERSION "v0.9"
44 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
45 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
46
47 #define TI_FIRMWARE_BUF_SIZE 16284
48
49 #define TI_WRITE_BUF_SIZE 1024
50
51 #define TI_TRANSFER_TIMEOUT 2
52
53 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
54
55 /* supported setserial flags */
56 #define TI_SET_SERIAL_FLAGS 0
57
58 /* read urb states */
59 #define TI_READ_URB_RUNNING 0
60 #define TI_READ_URB_STOPPING 1
61 #define TI_READ_URB_STOPPED 2
62
63 #define TI_EXTRA_VID_PID_COUNT 5
64
65
66 /* Structures */
67
68 struct ti_port {
69 int tp_is_open;
70 __u8 tp_msr;
71 __u8 tp_lsr;
72 __u8 tp_shadow_mcr;
73 __u8 tp_uart_mode; /* 232 or 485 modes */
74 unsigned int tp_uart_base_addr;
75 int tp_flags;
76 int tp_closing_wait;/* in .01 secs */
77 struct async_icount tp_icount;
78 wait_queue_head_t tp_msr_wait; /* wait for msr change */
79 wait_queue_head_t tp_write_wait;
80 struct ti_device *tp_tdev;
81 struct usb_serial_port *tp_port;
82 spinlock_t tp_lock;
83 int tp_read_urb_state;
84 int tp_write_urb_in_use;
85 struct circ_buf *tp_write_buf;
86 };
87
88 struct ti_device {
89 struct mutex td_open_close_lock;
90 int td_open_port_count;
91 struct usb_serial *td_serial;
92 int td_is_3410;
93 int td_urb_error;
94 };
95
96
97 /* Function Declarations */
98
99 static int ti_startup(struct usb_serial *serial);
100 static void ti_release(struct usb_serial *serial);
101 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
102 static void ti_close(struct usb_serial_port *port);
103 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
104 const unsigned char *data, int count);
105 static int ti_write_room(struct tty_struct *tty);
106 static int ti_chars_in_buffer(struct tty_struct *tty);
107 static void ti_throttle(struct tty_struct *tty);
108 static void ti_unthrottle(struct tty_struct *tty);
109 static int ti_ioctl(struct tty_struct *tty, struct file *file,
110 unsigned int cmd, unsigned long arg);
111 static void ti_set_termios(struct tty_struct *tty,
112 struct usb_serial_port *port, struct ktermios *old_termios);
113 static int ti_tiocmget(struct tty_struct *tty, struct file *file);
114 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
115 unsigned int set, unsigned int clear);
116 static void ti_break(struct tty_struct *tty, int break_state);
117 static void ti_interrupt_callback(struct urb *urb);
118 static void ti_bulk_in_callback(struct urb *urb);
119 static void ti_bulk_out_callback(struct urb *urb);
120
121 static void ti_recv(struct device *dev, struct tty_struct *tty,
122 unsigned char *data, int length);
123 static void ti_send(struct ti_port *tport);
124 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
125 static int ti_get_lsr(struct ti_port *tport);
126 static int ti_get_serial_info(struct ti_port *tport,
127 struct serial_struct __user *ret_arg);
128 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
129 struct serial_struct __user *new_arg);
130 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
131
132 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
133
134 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
135 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
136
137 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
138 __u16 moduleid, __u16 value, __u8 *data, int size);
139 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
140 __u16 moduleid, __u16 value, __u8 *data, int size);
141
142 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
143 __u8 mask, __u8 byte);
144
145 static int ti_download_firmware(struct ti_device *tdev);
146
147 /* circular buffer */
148 static struct circ_buf *ti_buf_alloc(void);
149 static void ti_buf_free(struct circ_buf *cb);
150 static void ti_buf_clear(struct circ_buf *cb);
151 static int ti_buf_data_avail(struct circ_buf *cb);
152 static int ti_buf_space_avail(struct circ_buf *cb);
153 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
154 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
155
156
157 /* Data */
158
159 /* module parameters */
160 static int debug;
161 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
162 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
163 static unsigned int vendor_3410_count;
164 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
165 static unsigned int product_3410_count;
166 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
167 static unsigned int vendor_5052_count;
168 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
169 static unsigned int product_5052_count;
170
171 /* supported devices */
172 /* the array dimension is the number of default entries plus */
173 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
174 /* null entry */
175 static struct usb_device_id ti_id_table_3410[13+TI_EXTRA_VID_PID_COUNT+1] = {
176 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
177 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
178 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
179 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
180 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
181 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
182 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
183 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
184 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
185 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
186 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
187 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
188 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
189 };
190
191 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
192 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
193 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
194 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
195 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
196 };
197
198 static struct usb_device_id ti_id_table_combined[17+2*TI_EXTRA_VID_PID_COUNT+1] = {
199 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
200 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
201 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
202 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
203 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
204 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
205 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
206 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
207 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
208 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
209 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
210 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
211 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
212 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
213 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
214 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
215 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
216 { }
217 };
218
219 static struct usb_driver ti_usb_driver = {
220 .name = "ti_usb_3410_5052",
221 .probe = usb_serial_probe,
222 .disconnect = usb_serial_disconnect,
223 .id_table = ti_id_table_combined,
224 .no_dynamic_id = 1,
225 };
226
227 static struct usb_serial_driver ti_1port_device = {
228 .driver = {
229 .owner = THIS_MODULE,
230 .name = "ti_usb_3410_5052_1",
231 },
232 .description = "TI USB 3410 1 port adapter",
233 .usb_driver = &ti_usb_driver,
234 .id_table = ti_id_table_3410,
235 .num_ports = 1,
236 .attach = ti_startup,
237 .release = ti_release,
238 .open = ti_open,
239 .close = ti_close,
240 .write = ti_write,
241 .write_room = ti_write_room,
242 .chars_in_buffer = ti_chars_in_buffer,
243 .throttle = ti_throttle,
244 .unthrottle = ti_unthrottle,
245 .ioctl = ti_ioctl,
246 .set_termios = ti_set_termios,
247 .tiocmget = ti_tiocmget,
248 .tiocmset = ti_tiocmset,
249 .break_ctl = ti_break,
250 .read_int_callback = ti_interrupt_callback,
251 .read_bulk_callback = ti_bulk_in_callback,
252 .write_bulk_callback = ti_bulk_out_callback,
253 };
254
255 static struct usb_serial_driver ti_2port_device = {
256 .driver = {
257 .owner = THIS_MODULE,
258 .name = "ti_usb_3410_5052_2",
259 },
260 .description = "TI USB 5052 2 port adapter",
261 .usb_driver = &ti_usb_driver,
262 .id_table = ti_id_table_5052,
263 .num_ports = 2,
264 .attach = ti_startup,
265 .release = ti_release,
266 .open = ti_open,
267 .close = ti_close,
268 .write = ti_write,
269 .write_room = ti_write_room,
270 .chars_in_buffer = ti_chars_in_buffer,
271 .throttle = ti_throttle,
272 .unthrottle = ti_unthrottle,
273 .ioctl = ti_ioctl,
274 .set_termios = ti_set_termios,
275 .tiocmget = ti_tiocmget,
276 .tiocmset = ti_tiocmset,
277 .break_ctl = ti_break,
278 .read_int_callback = ti_interrupt_callback,
279 .read_bulk_callback = ti_bulk_in_callback,
280 .write_bulk_callback = ti_bulk_out_callback,
281 };
282
283
284 /* Module */
285
286 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
287 MODULE_DESCRIPTION(TI_DRIVER_DESC);
288 MODULE_VERSION(TI_DRIVER_VERSION);
289 MODULE_LICENSE("GPL");
290
291 MODULE_FIRMWARE("ti_3410.fw");
292 MODULE_FIRMWARE("ti_5052.fw");
293 MODULE_FIRMWARE("mts_cdma.fw");
294 MODULE_FIRMWARE("mts_gsm.fw");
295 MODULE_FIRMWARE("mts_edge.fw");
296 MODULE_FIRMWARE("mts_mt9234mu.fw");
297 MODULE_FIRMWARE("mts_mt9234zba.fw");
298
299 module_param(debug, bool, S_IRUGO | S_IWUSR);
300 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
301
302 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
303 MODULE_PARM_DESC(closing_wait,
304 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
305
306 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
307 MODULE_PARM_DESC(vendor_3410,
308 "Vendor ids for 3410 based devices, 1-5 short integers");
309 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
310 MODULE_PARM_DESC(product_3410,
311 "Product ids for 3410 based devices, 1-5 short integers");
312 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
313 MODULE_PARM_DESC(vendor_5052,
314 "Vendor ids for 5052 based devices, 1-5 short integers");
315 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
316 MODULE_PARM_DESC(product_5052,
317 "Product ids for 5052 based devices, 1-5 short integers");
318
319 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
320
321
322 /* Functions */
323
324 static int __init ti_init(void)
325 {
326 int i, j, c;
327 int ret;
328
329 /* insert extra vendor and product ids */
330 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
331 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
332 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
333 ti_id_table_3410[j].idVendor = vendor_3410[i];
334 ti_id_table_3410[j].idProduct = product_3410[i];
335 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
336 ti_id_table_combined[c].idVendor = vendor_3410[i];
337 ti_id_table_combined[c].idProduct = product_3410[i];
338 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
339 }
340 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
341 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
342 ti_id_table_5052[j].idVendor = vendor_5052[i];
343 ti_id_table_5052[j].idProduct = product_5052[i];
344 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
345 ti_id_table_combined[c].idVendor = vendor_5052[i];
346 ti_id_table_combined[c].idProduct = product_5052[i];
347 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
348 }
349
350 ret = usb_serial_register(&ti_1port_device);
351 if (ret)
352 goto failed_1port;
353 ret = usb_serial_register(&ti_2port_device);
354 if (ret)
355 goto failed_2port;
356
357 ret = usb_register(&ti_usb_driver);
358 if (ret)
359 goto failed_usb;
360
361 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
362 TI_DRIVER_DESC "\n");
363
364 return 0;
365
366 failed_usb:
367 usb_serial_deregister(&ti_2port_device);
368 failed_2port:
369 usb_serial_deregister(&ti_1port_device);
370 failed_1port:
371 return ret;
372 }
373
374
375 static void __exit ti_exit(void)
376 {
377 usb_serial_deregister(&ti_1port_device);
378 usb_serial_deregister(&ti_2port_device);
379 usb_deregister(&ti_usb_driver);
380 }
381
382
383 module_init(ti_init);
384 module_exit(ti_exit);
385
386
387 static int ti_startup(struct usb_serial *serial)
388 {
389 struct ti_device *tdev;
390 struct ti_port *tport;
391 struct usb_device *dev = serial->dev;
392 int status;
393 int i;
394
395
396 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
397 __func__, le16_to_cpu(dev->descriptor.idProduct),
398 dev->descriptor.bNumConfigurations,
399 dev->actconfig->desc.bConfigurationValue);
400
401 /* create device structure */
402 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
403 if (tdev == NULL) {
404 dev_err(&dev->dev, "%s - out of memory\n", __func__);
405 return -ENOMEM;
406 }
407 mutex_init(&tdev->td_open_close_lock);
408 tdev->td_serial = serial;
409 usb_set_serial_data(serial, tdev);
410
411 /* determine device type */
412 if (usb_match_id(serial->interface, ti_id_table_3410))
413 tdev->td_is_3410 = 1;
414 dbg("%s - device type is %s", __func__,
415 tdev->td_is_3410 ? "3410" : "5052");
416
417 /* if we have only 1 configuration, download firmware */
418 if (dev->descriptor.bNumConfigurations == 1) {
419 if ((status = ti_download_firmware(tdev)) != 0)
420 goto free_tdev;
421
422 /* 3410 must be reset, 5052 resets itself */
423 if (tdev->td_is_3410) {
424 msleep_interruptible(100);
425 usb_reset_device(dev);
426 }
427
428 status = -ENODEV;
429 goto free_tdev;
430 }
431
432 /* the second configuration must be set */
433 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
434 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
435 status = status ? status : -ENODEV;
436 goto free_tdev;
437 }
438
439 /* set up port structures */
440 for (i = 0; i < serial->num_ports; ++i) {
441 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
442 if (tport == NULL) {
443 dev_err(&dev->dev, "%s - out of memory\n", __func__);
444 status = -ENOMEM;
445 goto free_tports;
446 }
447 spin_lock_init(&tport->tp_lock);
448 tport->tp_uart_base_addr = (i == 0 ?
449 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
450 tport->tp_closing_wait = closing_wait;
451 init_waitqueue_head(&tport->tp_msr_wait);
452 init_waitqueue_head(&tport->tp_write_wait);
453 tport->tp_write_buf = ti_buf_alloc();
454 if (tport->tp_write_buf == NULL) {
455 dev_err(&dev->dev, "%s - out of memory\n", __func__);
456 kfree(tport);
457 status = -ENOMEM;
458 goto free_tports;
459 }
460 tport->tp_port = serial->port[i];
461 tport->tp_tdev = tdev;
462 usb_set_serial_port_data(serial->port[i], tport);
463 tport->tp_uart_mode = 0; /* default is RS232 */
464 }
465
466 return 0;
467
468 free_tports:
469 for (--i; i >= 0; --i) {
470 tport = usb_get_serial_port_data(serial->port[i]);
471 ti_buf_free(tport->tp_write_buf);
472 kfree(tport);
473 usb_set_serial_port_data(serial->port[i], NULL);
474 }
475 free_tdev:
476 kfree(tdev);
477 usb_set_serial_data(serial, NULL);
478 return status;
479 }
480
481
482 static void ti_release(struct usb_serial *serial)
483 {
484 int i;
485 struct ti_device *tdev = usb_get_serial_data(serial);
486 struct ti_port *tport;
487
488 dbg("%s", __func__);
489
490 for (i = 0; i < serial->num_ports; ++i) {
491 tport = usb_get_serial_port_data(serial->port[i]);
492 if (tport) {
493 ti_buf_free(tport->tp_write_buf);
494 kfree(tport);
495 }
496 }
497
498 kfree(tdev);
499 }
500
501
502 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
503 {
504 struct ti_port *tport = usb_get_serial_port_data(port);
505 struct ti_device *tdev;
506 struct usb_device *dev;
507 struct urb *urb;
508 int port_number;
509 int status;
510 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
511 TI_PIPE_TIMEOUT_ENABLE |
512 (TI_TRANSFER_TIMEOUT << 2));
513
514 dbg("%s - port %d", __func__, port->number);
515
516 if (tport == NULL)
517 return -ENODEV;
518
519 dev = port->serial->dev;
520 tdev = tport->tp_tdev;
521
522 /* only one open on any port on a device at a time */
523 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
524 return -ERESTARTSYS;
525
526 port_number = port->number - port->serial->minor;
527
528 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
529
530 tport->tp_msr = 0;
531 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
532
533 /* start interrupt urb the first time a port is opened on this device */
534 if (tdev->td_open_port_count == 0) {
535 dbg("%s - start interrupt in urb", __func__);
536 urb = tdev->td_serial->port[0]->interrupt_in_urb;
537 if (!urb) {
538 dev_err(&port->dev, "%s - no interrupt urb\n",
539 __func__);
540 status = -EINVAL;
541 goto release_lock;
542 }
543 urb->complete = ti_interrupt_callback;
544 urb->context = tdev;
545 urb->dev = dev;
546 status = usb_submit_urb(urb, GFP_KERNEL);
547 if (status) {
548 dev_err(&port->dev,
549 "%s - submit interrupt urb failed, %d\n",
550 __func__, status);
551 goto release_lock;
552 }
553 }
554
555 if (tty)
556 ti_set_termios(tty, port, tty->termios);
557
558 dbg("%s - sending TI_OPEN_PORT", __func__);
559 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
560 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
561 if (status) {
562 dev_err(&port->dev, "%s - cannot send open command, %d\n",
563 __func__, status);
564 goto unlink_int_urb;
565 }
566
567 dbg("%s - sending TI_START_PORT", __func__);
568 status = ti_command_out_sync(tdev, TI_START_PORT,
569 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
570 if (status) {
571 dev_err(&port->dev, "%s - cannot send start command, %d\n",
572 __func__, status);
573 goto unlink_int_urb;
574 }
575
576 dbg("%s - sending TI_PURGE_PORT", __func__);
577 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
578 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
579 if (status) {
580 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
581 __func__, status);
582 goto unlink_int_urb;
583 }
584 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
585 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
586 if (status) {
587 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
588 __func__, status);
589 goto unlink_int_urb;
590 }
591
592 /* reset the data toggle on the bulk endpoints to work around bug in
593 * host controllers where things get out of sync some times */
594 usb_clear_halt(dev, port->write_urb->pipe);
595 usb_clear_halt(dev, port->read_urb->pipe);
596
597 if (tty)
598 ti_set_termios(tty, port, tty->termios);
599
600 dbg("%s - sending TI_OPEN_PORT (2)", __func__);
601 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
602 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
603 if (status) {
604 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
605 __func__, status);
606 goto unlink_int_urb;
607 }
608
609 dbg("%s - sending TI_START_PORT (2)", __func__);
610 status = ti_command_out_sync(tdev, TI_START_PORT,
611 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
612 if (status) {
613 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
614 __func__, status);
615 goto unlink_int_urb;
616 }
617
618 /* start read urb */
619 dbg("%s - start read urb", __func__);
620 urb = port->read_urb;
621 if (!urb) {
622 dev_err(&port->dev, "%s - no read urb\n", __func__);
623 status = -EINVAL;
624 goto unlink_int_urb;
625 }
626 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
627 urb->complete = ti_bulk_in_callback;
628 urb->context = tport;
629 urb->dev = dev;
630 status = usb_submit_urb(urb, GFP_KERNEL);
631 if (status) {
632 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
633 __func__, status);
634 goto unlink_int_urb;
635 }
636
637 tport->tp_is_open = 1;
638 ++tdev->td_open_port_count;
639
640 goto release_lock;
641
642 unlink_int_urb:
643 if (tdev->td_open_port_count == 0)
644 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
645 release_lock:
646 mutex_unlock(&tdev->td_open_close_lock);
647 dbg("%s - exit %d", __func__, status);
648 return status;
649 }
650
651
652 static void ti_close(struct usb_serial_port *port)
653 {
654 struct ti_device *tdev;
655 struct ti_port *tport;
656 int port_number;
657 int status;
658 int do_unlock;
659
660 dbg("%s - port %d", __func__, port->number);
661
662 tdev = usb_get_serial_data(port->serial);
663 tport = usb_get_serial_port_data(port);
664 if (tdev == NULL || tport == NULL)
665 return;
666
667 tport->tp_is_open = 0;
668
669 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
670
671 usb_kill_urb(port->read_urb);
672 usb_kill_urb(port->write_urb);
673 tport->tp_write_urb_in_use = 0;
674
675 port_number = port->number - port->serial->minor;
676
677 dbg("%s - sending TI_CLOSE_PORT", __func__);
678 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
679 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
680 if (status)
681 dev_err(&port->dev,
682 "%s - cannot send close port command, %d\n"
683 , __func__, status);
684
685 /* if mutex_lock is interrupted, continue anyway */
686 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
687 --tport->tp_tdev->td_open_port_count;
688 if (tport->tp_tdev->td_open_port_count <= 0) {
689 /* last port is closed, shut down interrupt urb */
690 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
691 tport->tp_tdev->td_open_port_count = 0;
692 }
693 if (do_unlock)
694 mutex_unlock(&tdev->td_open_close_lock);
695
696 dbg("%s - exit", __func__);
697 }
698
699
700 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
701 const unsigned char *data, int count)
702 {
703 struct ti_port *tport = usb_get_serial_port_data(port);
704 unsigned long flags;
705
706 dbg("%s - port %d", __func__, port->number);
707
708 if (count == 0) {
709 dbg("%s - write request of 0 bytes", __func__);
710 return 0;
711 }
712
713 if (tport == NULL || !tport->tp_is_open)
714 return -ENODEV;
715
716 spin_lock_irqsave(&tport->tp_lock, flags);
717 count = ti_buf_put(tport->tp_write_buf, data, count);
718 spin_unlock_irqrestore(&tport->tp_lock, flags);
719
720 ti_send(tport);
721
722 return count;
723 }
724
725
726 static int ti_write_room(struct tty_struct *tty)
727 {
728 struct usb_serial_port *port = tty->driver_data;
729 struct ti_port *tport = usb_get_serial_port_data(port);
730 int room = 0;
731 unsigned long flags;
732
733 dbg("%s - port %d", __func__, port->number);
734
735 if (tport == NULL)
736 return 0;
737
738 spin_lock_irqsave(&tport->tp_lock, flags);
739 room = ti_buf_space_avail(tport->tp_write_buf);
740 spin_unlock_irqrestore(&tport->tp_lock, flags);
741
742 dbg("%s - returns %d", __func__, room);
743 return room;
744 }
745
746
747 static int ti_chars_in_buffer(struct tty_struct *tty)
748 {
749 struct usb_serial_port *port = tty->driver_data;
750 struct ti_port *tport = usb_get_serial_port_data(port);
751 int chars = 0;
752 unsigned long flags;
753
754 dbg("%s - port %d", __func__, port->number);
755
756 if (tport == NULL)
757 return 0;
758
759 spin_lock_irqsave(&tport->tp_lock, flags);
760 chars = ti_buf_data_avail(tport->tp_write_buf);
761 spin_unlock_irqrestore(&tport->tp_lock, flags);
762
763 dbg("%s - returns %d", __func__, chars);
764 return chars;
765 }
766
767
768 static void ti_throttle(struct tty_struct *tty)
769 {
770 struct usb_serial_port *port = tty->driver_data;
771 struct ti_port *tport = usb_get_serial_port_data(port);
772
773 dbg("%s - port %d", __func__, port->number);
774
775 if (tport == NULL)
776 return;
777
778 if (I_IXOFF(tty) || C_CRTSCTS(tty))
779 ti_stop_read(tport, tty);
780
781 }
782
783
784 static void ti_unthrottle(struct tty_struct *tty)
785 {
786 struct usb_serial_port *port = tty->driver_data;
787 struct ti_port *tport = usb_get_serial_port_data(port);
788 int status;
789
790 dbg("%s - port %d", __func__, port->number);
791
792 if (tport == NULL)
793 return;
794
795 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
796 status = ti_restart_read(tport, tty);
797 if (status)
798 dev_err(&port->dev, "%s - cannot restart read, %d\n",
799 __func__, status);
800 }
801 }
802
803
804 static int ti_ioctl(struct tty_struct *tty, struct file *file,
805 unsigned int cmd, unsigned long arg)
806 {
807 struct usb_serial_port *port = tty->driver_data;
808 struct ti_port *tport = usb_get_serial_port_data(port);
809 struct async_icount cnow;
810 struct async_icount cprev;
811
812 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
813
814 if (tport == NULL)
815 return -ENODEV;
816
817 switch (cmd) {
818 case TIOCGSERIAL:
819 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
820 return ti_get_serial_info(tport,
821 (struct serial_struct __user *)arg);
822 case TIOCSSERIAL:
823 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
824 return ti_set_serial_info(tty, tport,
825 (struct serial_struct __user *)arg);
826 case TIOCMIWAIT:
827 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
828 cprev = tport->tp_icount;
829 while (1) {
830 interruptible_sleep_on(&tport->tp_msr_wait);
831 if (signal_pending(current))
832 return -ERESTARTSYS;
833 cnow = tport->tp_icount;
834 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
835 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
836 return -EIO; /* no change => error */
837 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
838 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
839 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
840 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
841 return 0;
842 cprev = cnow;
843 }
844 break;
845 case TIOCGICOUNT:
846 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
847 __func__, port->number,
848 tport->tp_icount.rx, tport->tp_icount.tx);
849 if (copy_to_user((void __user *)arg, &tport->tp_icount,
850 sizeof(tport->tp_icount)))
851 return -EFAULT;
852 return 0;
853 }
854 return -ENOIOCTLCMD;
855 }
856
857
858 static void ti_set_termios(struct tty_struct *tty,
859 struct usb_serial_port *port, struct ktermios *old_termios)
860 {
861 struct ti_port *tport = usb_get_serial_port_data(port);
862 struct ti_uart_config *config;
863 tcflag_t cflag, iflag;
864 int baud;
865 int status;
866 int port_number = port->number - port->serial->minor;
867 unsigned int mcr;
868
869 dbg("%s - port %d", __func__, port->number);
870
871 cflag = tty->termios->c_cflag;
872 iflag = tty->termios->c_iflag;
873
874 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
875 dbg("%s - old clfag %08x, old iflag %08x", __func__,
876 old_termios->c_cflag, old_termios->c_iflag);
877
878 if (tport == NULL)
879 return;
880
881 config = kmalloc(sizeof(*config), GFP_KERNEL);
882 if (!config) {
883 dev_err(&port->dev, "%s - out of memory\n", __func__);
884 return;
885 }
886
887 config->wFlags = 0;
888
889 /* these flags must be set */
890 config->wFlags |= TI_UART_ENABLE_MS_INTS;
891 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
892 config->bUartMode = (__u8)(tport->tp_uart_mode);
893
894 switch (cflag & CSIZE) {
895 case CS5:
896 config->bDataBits = TI_UART_5_DATA_BITS;
897 break;
898 case CS6:
899 config->bDataBits = TI_UART_6_DATA_BITS;
900 break;
901 case CS7:
902 config->bDataBits = TI_UART_7_DATA_BITS;
903 break;
904 default:
905 case CS8:
906 config->bDataBits = TI_UART_8_DATA_BITS;
907 break;
908 }
909
910 /* CMSPAR isn't supported by this driver */
911 tty->termios->c_cflag &= ~CMSPAR;
912
913 if (cflag & PARENB) {
914 if (cflag & PARODD) {
915 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
916 config->bParity = TI_UART_ODD_PARITY;
917 } else {
918 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
919 config->bParity = TI_UART_EVEN_PARITY;
920 }
921 } else {
922 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
923 config->bParity = TI_UART_NO_PARITY;
924 }
925
926 if (cflag & CSTOPB)
927 config->bStopBits = TI_UART_2_STOP_BITS;
928 else
929 config->bStopBits = TI_UART_1_STOP_BITS;
930
931 if (cflag & CRTSCTS) {
932 /* RTS flow control must be off to drop RTS for baud rate B0 */
933 if ((cflag & CBAUD) != B0)
934 config->wFlags |= TI_UART_ENABLE_RTS_IN;
935 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
936 } else {
937 tty->hw_stopped = 0;
938 ti_restart_read(tport, tty);
939 }
940
941 if (I_IXOFF(tty) || I_IXON(tty)) {
942 config->cXon = START_CHAR(tty);
943 config->cXoff = STOP_CHAR(tty);
944
945 if (I_IXOFF(tty))
946 config->wFlags |= TI_UART_ENABLE_X_IN;
947 else
948 ti_restart_read(tport, tty);
949
950 if (I_IXON(tty))
951 config->wFlags |= TI_UART_ENABLE_X_OUT;
952 }
953
954 baud = tty_get_baud_rate(tty);
955 if (!baud)
956 baud = 9600;
957 if (tport->tp_tdev->td_is_3410)
958 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
959 else
960 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
961
962 /* FIXME: Should calculate resulting baud here and report it back */
963 if ((cflag & CBAUD) != B0)
964 tty_encode_baud_rate(tty, baud, baud);
965
966 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
967 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
968
969 cpu_to_be16s(&config->wBaudRate);
970 cpu_to_be16s(&config->wFlags);
971
972 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
973 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
974 sizeof(*config));
975 if (status)
976 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
977 __func__, port_number, status);
978
979 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
980 mcr = tport->tp_shadow_mcr;
981 /* if baud rate is B0, clear RTS and DTR */
982 if ((cflag & CBAUD) == B0)
983 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
984 status = ti_set_mcr(tport, mcr);
985 if (status)
986 dev_err(&port->dev,
987 "%s - cannot set modem control on port %d, %d\n",
988 __func__, port_number, status);
989
990 kfree(config);
991 }
992
993
994 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
995 {
996 struct usb_serial_port *port = tty->driver_data;
997 struct ti_port *tport = usb_get_serial_port_data(port);
998 unsigned int result;
999 unsigned int msr;
1000 unsigned int mcr;
1001 unsigned long flags;
1002
1003 dbg("%s - port %d", __func__, port->number);
1004
1005 if (tport == NULL)
1006 return -ENODEV;
1007
1008 spin_lock_irqsave(&tport->tp_lock, flags);
1009 msr = tport->tp_msr;
1010 mcr = tport->tp_shadow_mcr;
1011 spin_unlock_irqrestore(&tport->tp_lock, flags);
1012
1013 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1014 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1015 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1016 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1017 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1018 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1019 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1020
1021 dbg("%s - 0x%04X", __func__, result);
1022
1023 return result;
1024 }
1025
1026
1027 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1028 unsigned int set, unsigned int clear)
1029 {
1030 struct usb_serial_port *port = tty->driver_data;
1031 struct ti_port *tport = usb_get_serial_port_data(port);
1032 unsigned int mcr;
1033 unsigned long flags;
1034
1035 dbg("%s - port %d", __func__, port->number);
1036
1037 if (tport == NULL)
1038 return -ENODEV;
1039
1040 spin_lock_irqsave(&tport->tp_lock, flags);
1041 mcr = tport->tp_shadow_mcr;
1042
1043 if (set & TIOCM_RTS)
1044 mcr |= TI_MCR_RTS;
1045 if (set & TIOCM_DTR)
1046 mcr |= TI_MCR_DTR;
1047 if (set & TIOCM_LOOP)
1048 mcr |= TI_MCR_LOOP;
1049
1050 if (clear & TIOCM_RTS)
1051 mcr &= ~TI_MCR_RTS;
1052 if (clear & TIOCM_DTR)
1053 mcr &= ~TI_MCR_DTR;
1054 if (clear & TIOCM_LOOP)
1055 mcr &= ~TI_MCR_LOOP;
1056 spin_unlock_irqrestore(&tport->tp_lock, flags);
1057
1058 return ti_set_mcr(tport, mcr);
1059 }
1060
1061
1062 static void ti_break(struct tty_struct *tty, int break_state)
1063 {
1064 struct usb_serial_port *port = tty->driver_data;
1065 struct ti_port *tport = usb_get_serial_port_data(port);
1066 int status;
1067
1068 dbg("%s - state = %d", __func__, break_state);
1069
1070 if (tport == NULL)
1071 return;
1072
1073 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1074
1075 status = ti_write_byte(tport->tp_tdev,
1076 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1077 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1078
1079 if (status)
1080 dbg("%s - error setting break, %d", __func__, status);
1081 }
1082
1083
1084 static void ti_interrupt_callback(struct urb *urb)
1085 {
1086 struct ti_device *tdev = urb->context;
1087 struct usb_serial_port *port;
1088 struct usb_serial *serial = tdev->td_serial;
1089 struct ti_port *tport;
1090 struct device *dev = &urb->dev->dev;
1091 unsigned char *data = urb->transfer_buffer;
1092 int length = urb->actual_length;
1093 int port_number;
1094 int function;
1095 int status = urb->status;
1096 int retval;
1097 __u8 msr;
1098
1099 dbg("%s", __func__);
1100
1101 switch (status) {
1102 case 0:
1103 break;
1104 case -ECONNRESET:
1105 case -ENOENT:
1106 case -ESHUTDOWN:
1107 dbg("%s - urb shutting down, %d", __func__, status);
1108 tdev->td_urb_error = 1;
1109 return;
1110 default:
1111 dev_err(dev, "%s - nonzero urb status, %d\n",
1112 __func__, status);
1113 tdev->td_urb_error = 1;
1114 goto exit;
1115 }
1116
1117 if (length != 2) {
1118 dbg("%s - bad packet size, %d", __func__, length);
1119 goto exit;
1120 }
1121
1122 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1123 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1124 goto exit;
1125 }
1126
1127 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1128 function = TI_GET_FUNC_FROM_CODE(data[0]);
1129
1130 dbg("%s - port_number %d, function %d, data 0x%02X",
1131 __func__, port_number, function, data[1]);
1132
1133 if (port_number >= serial->num_ports) {
1134 dev_err(dev, "%s - bad port number, %d\n",
1135 __func__, port_number);
1136 goto exit;
1137 }
1138
1139 port = serial->port[port_number];
1140
1141 tport = usb_get_serial_port_data(port);
1142 if (!tport)
1143 goto exit;
1144
1145 switch (function) {
1146 case TI_CODE_DATA_ERROR:
1147 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1148 __func__, port_number, data[1]);
1149 break;
1150
1151 case TI_CODE_MODEM_STATUS:
1152 msr = data[1];
1153 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1154 ti_handle_new_msr(tport, msr);
1155 break;
1156
1157 default:
1158 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1159 __func__, data[1]);
1160 break;
1161 }
1162
1163 exit:
1164 retval = usb_submit_urb(urb, GFP_ATOMIC);
1165 if (retval)
1166 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1167 __func__, retval);
1168 }
1169
1170
1171 static void ti_bulk_in_callback(struct urb *urb)
1172 {
1173 struct ti_port *tport = urb->context;
1174 struct usb_serial_port *port = tport->tp_port;
1175 struct device *dev = &urb->dev->dev;
1176 int status = urb->status;
1177 int retval = 0;
1178 struct tty_struct *tty;
1179
1180 dbg("%s", __func__);
1181
1182 switch (status) {
1183 case 0:
1184 break;
1185 case -ECONNRESET:
1186 case -ENOENT:
1187 case -ESHUTDOWN:
1188 dbg("%s - urb shutting down, %d", __func__, status);
1189 tport->tp_tdev->td_urb_error = 1;
1190 wake_up_interruptible(&tport->tp_write_wait);
1191 return;
1192 default:
1193 dev_err(dev, "%s - nonzero urb status, %d\n",
1194 __func__, status);
1195 tport->tp_tdev->td_urb_error = 1;
1196 wake_up_interruptible(&tport->tp_write_wait);
1197 }
1198
1199 if (status == -EPIPE)
1200 goto exit;
1201
1202 if (status) {
1203 dev_err(dev, "%s - stopping read!\n", __func__);
1204 return;
1205 }
1206
1207 tty = tty_port_tty_get(&port->port);
1208 if (tty) {
1209 if (urb->actual_length) {
1210 usb_serial_debug_data(debug, dev, __func__,
1211 urb->actual_length, urb->transfer_buffer);
1212
1213 if (!tport->tp_is_open)
1214 dbg("%s - port closed, dropping data",
1215 __func__);
1216 else
1217 ti_recv(&urb->dev->dev, tty,
1218 urb->transfer_buffer,
1219 urb->actual_length);
1220 spin_lock(&tport->tp_lock);
1221 tport->tp_icount.rx += urb->actual_length;
1222 spin_unlock(&tport->tp_lock);
1223 }
1224 tty_kref_put(tty);
1225 }
1226
1227 exit:
1228 /* continue to read unless stopping */
1229 spin_lock(&tport->tp_lock);
1230 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1231 urb->dev = port->serial->dev;
1232 retval = usb_submit_urb(urb, GFP_ATOMIC);
1233 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1234 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1235 }
1236 spin_unlock(&tport->tp_lock);
1237 if (retval)
1238 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1239 __func__, retval);
1240 }
1241
1242
1243 static void ti_bulk_out_callback(struct urb *urb)
1244 {
1245 struct ti_port *tport = urb->context;
1246 struct usb_serial_port *port = tport->tp_port;
1247 struct device *dev = &urb->dev->dev;
1248 int status = urb->status;
1249
1250 dbg("%s - port %d", __func__, port->number);
1251
1252 tport->tp_write_urb_in_use = 0;
1253
1254 switch (status) {
1255 case 0:
1256 break;
1257 case -ECONNRESET:
1258 case -ENOENT:
1259 case -ESHUTDOWN:
1260 dbg("%s - urb shutting down, %d", __func__, status);
1261 tport->tp_tdev->td_urb_error = 1;
1262 wake_up_interruptible(&tport->tp_write_wait);
1263 return;
1264 default:
1265 dev_err(dev, "%s - nonzero urb status, %d\n",
1266 __func__, status);
1267 tport->tp_tdev->td_urb_error = 1;
1268 wake_up_interruptible(&tport->tp_write_wait);
1269 }
1270
1271 /* send any buffered data */
1272 ti_send(tport);
1273 }
1274
1275
1276 static void ti_recv(struct device *dev, struct tty_struct *tty,
1277 unsigned char *data, int length)
1278 {
1279 int cnt;
1280
1281 do {
1282 cnt = tty_insert_flip_string(tty, data, length);
1283 if (cnt < length) {
1284 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1285 __func__, length - cnt);
1286 if (cnt == 0)
1287 break;
1288 }
1289 tty_flip_buffer_push(tty);
1290 data += cnt;
1291 length -= cnt;
1292 } while (length > 0);
1293
1294 }
1295
1296
1297 static void ti_send(struct ti_port *tport)
1298 {
1299 int count, result;
1300 struct usb_serial_port *port = tport->tp_port;
1301 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1302 unsigned long flags;
1303
1304
1305 dbg("%s - port %d", __func__, port->number);
1306
1307 spin_lock_irqsave(&tport->tp_lock, flags);
1308
1309 if (tport->tp_write_urb_in_use)
1310 goto unlock;
1311
1312 count = ti_buf_get(tport->tp_write_buf,
1313 port->write_urb->transfer_buffer,
1314 port->bulk_out_size);
1315
1316 if (count == 0)
1317 goto unlock;
1318
1319 tport->tp_write_urb_in_use = 1;
1320
1321 spin_unlock_irqrestore(&tport->tp_lock, flags);
1322
1323 usb_serial_debug_data(debug, &port->dev, __func__, count,
1324 port->write_urb->transfer_buffer);
1325
1326 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1327 usb_sndbulkpipe(port->serial->dev,
1328 port->bulk_out_endpointAddress),
1329 port->write_urb->transfer_buffer, count,
1330 ti_bulk_out_callback, tport);
1331
1332 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1333 if (result) {
1334 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1335 __func__, result);
1336 tport->tp_write_urb_in_use = 0;
1337 /* TODO: reschedule ti_send */
1338 } else {
1339 spin_lock_irqsave(&tport->tp_lock, flags);
1340 tport->tp_icount.tx += count;
1341 spin_unlock_irqrestore(&tport->tp_lock, flags);
1342 }
1343
1344 /* more room in the buffer for new writes, wakeup */
1345 if (tty)
1346 tty_wakeup(tty);
1347 tty_kref_put(tty);
1348 wake_up_interruptible(&tport->tp_write_wait);
1349 return;
1350 unlock:
1351 spin_unlock_irqrestore(&tport->tp_lock, flags);
1352 tty_kref_put(tty);
1353 return;
1354 }
1355
1356
1357 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1358 {
1359 unsigned long flags;
1360 int status;
1361
1362 status = ti_write_byte(tport->tp_tdev,
1363 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1364 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1365
1366 spin_lock_irqsave(&tport->tp_lock, flags);
1367 if (!status)
1368 tport->tp_shadow_mcr = mcr;
1369 spin_unlock_irqrestore(&tport->tp_lock, flags);
1370
1371 return status;
1372 }
1373
1374
1375 static int ti_get_lsr(struct ti_port *tport)
1376 {
1377 int size, status;
1378 struct ti_device *tdev = tport->tp_tdev;
1379 struct usb_serial_port *port = tport->tp_port;
1380 int port_number = port->number - port->serial->minor;
1381 struct ti_port_status *data;
1382
1383 dbg("%s - port %d", __func__, port->number);
1384
1385 size = sizeof(struct ti_port_status);
1386 data = kmalloc(size, GFP_KERNEL);
1387 if (!data) {
1388 dev_err(&port->dev, "%s - out of memory\n", __func__);
1389 return -ENOMEM;
1390 }
1391
1392 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1393 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1394 if (status) {
1395 dev_err(&port->dev,
1396 "%s - get port status command failed, %d\n",
1397 __func__, status);
1398 goto free_data;
1399 }
1400
1401 dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1402
1403 tport->tp_lsr = data->bLSR;
1404
1405 free_data:
1406 kfree(data);
1407 return status;
1408 }
1409
1410
1411 static int ti_get_serial_info(struct ti_port *tport,
1412 struct serial_struct __user *ret_arg)
1413 {
1414 struct usb_serial_port *port = tport->tp_port;
1415 struct serial_struct ret_serial;
1416
1417 if (!ret_arg)
1418 return -EFAULT;
1419
1420 memset(&ret_serial, 0, sizeof(ret_serial));
1421
1422 ret_serial.type = PORT_16550A;
1423 ret_serial.line = port->serial->minor;
1424 ret_serial.port = port->number - port->serial->minor;
1425 ret_serial.flags = tport->tp_flags;
1426 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1427 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1428 ret_serial.closing_wait = tport->tp_closing_wait;
1429
1430 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1431 return -EFAULT;
1432
1433 return 0;
1434 }
1435
1436
1437 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1438 struct serial_struct __user *new_arg)
1439 {
1440 struct serial_struct new_serial;
1441
1442 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1443 return -EFAULT;
1444
1445 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1446 tport->tp_closing_wait = new_serial.closing_wait;
1447
1448 return 0;
1449 }
1450
1451
1452 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1453 {
1454 struct async_icount *icount;
1455 struct tty_struct *tty;
1456 unsigned long flags;
1457
1458 dbg("%s - msr 0x%02X", __func__, msr);
1459
1460 if (msr & TI_MSR_DELTA_MASK) {
1461 spin_lock_irqsave(&tport->tp_lock, flags);
1462 icount = &tport->tp_icount;
1463 if (msr & TI_MSR_DELTA_CTS)
1464 icount->cts++;
1465 if (msr & TI_MSR_DELTA_DSR)
1466 icount->dsr++;
1467 if (msr & TI_MSR_DELTA_CD)
1468 icount->dcd++;
1469 if (msr & TI_MSR_DELTA_RI)
1470 icount->rng++;
1471 wake_up_interruptible(&tport->tp_msr_wait);
1472 spin_unlock_irqrestore(&tport->tp_lock, flags);
1473 }
1474
1475 tport->tp_msr = msr & TI_MSR_MASK;
1476
1477 /* handle CTS flow control */
1478 tty = tty_port_tty_get(&tport->tp_port->port);
1479 if (tty && C_CRTSCTS(tty)) {
1480 if (msr & TI_MSR_CTS) {
1481 tty->hw_stopped = 0;
1482 tty_wakeup(tty);
1483 } else {
1484 tty->hw_stopped = 1;
1485 }
1486 }
1487 tty_kref_put(tty);
1488 }
1489
1490
1491 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1492 {
1493 struct ti_device *tdev = tport->tp_tdev;
1494 struct usb_serial_port *port = tport->tp_port;
1495 wait_queue_t wait;
1496
1497 dbg("%s - port %d", __func__, port->number);
1498
1499 spin_lock_irq(&tport->tp_lock);
1500
1501 /* wait for data to drain from the buffer */
1502 tdev->td_urb_error = 0;
1503 init_waitqueue_entry(&wait, current);
1504 add_wait_queue(&tport->tp_write_wait, &wait);
1505 for (;;) {
1506 set_current_state(TASK_INTERRUPTIBLE);
1507 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1508 || timeout == 0 || signal_pending(current)
1509 || tdev->td_urb_error
1510 || port->serial->disconnected) /* disconnect */
1511 break;
1512 spin_unlock_irq(&tport->tp_lock);
1513 timeout = schedule_timeout(timeout);
1514 spin_lock_irq(&tport->tp_lock);
1515 }
1516 set_current_state(TASK_RUNNING);
1517 remove_wait_queue(&tport->tp_write_wait, &wait);
1518
1519 /* flush any remaining data in the buffer */
1520 if (flush)
1521 ti_buf_clear(tport->tp_write_buf);
1522
1523 spin_unlock_irq(&tport->tp_lock);
1524
1525 mutex_lock(&port->serial->disc_mutex);
1526 /* wait for data to drain from the device */
1527 /* wait for empty tx register, plus 20 ms */
1528 timeout += jiffies;
1529 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1530 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1531 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1532 && !port->serial->disconnected) {
1533 if (ti_get_lsr(tport))
1534 break;
1535 mutex_unlock(&port->serial->disc_mutex);
1536 msleep_interruptible(20);
1537 mutex_lock(&port->serial->disc_mutex);
1538 }
1539 mutex_unlock(&port->serial->disc_mutex);
1540 }
1541
1542
1543 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1544 {
1545 unsigned long flags;
1546
1547 spin_lock_irqsave(&tport->tp_lock, flags);
1548
1549 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1550 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1551
1552 spin_unlock_irqrestore(&tport->tp_lock, flags);
1553 }
1554
1555
1556 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1557 {
1558 struct urb *urb;
1559 int status = 0;
1560 unsigned long flags;
1561
1562 spin_lock_irqsave(&tport->tp_lock, flags);
1563
1564 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1565 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1566 urb = tport->tp_port->read_urb;
1567 spin_unlock_irqrestore(&tport->tp_lock, flags);
1568 urb->complete = ti_bulk_in_callback;
1569 urb->context = tport;
1570 urb->dev = tport->tp_port->serial->dev;
1571 status = usb_submit_urb(urb, GFP_KERNEL);
1572 } else {
1573 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1574 spin_unlock_irqrestore(&tport->tp_lock, flags);
1575 }
1576
1577 return status;
1578 }
1579
1580
1581 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1582 __u16 moduleid, __u16 value, __u8 *data, int size)
1583 {
1584 int status;
1585
1586 status = usb_control_msg(tdev->td_serial->dev,
1587 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1588 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1589 value, moduleid, data, size, 1000);
1590
1591 if (status == size)
1592 status = 0;
1593
1594 if (status > 0)
1595 status = -ECOMM;
1596
1597 return status;
1598 }
1599
1600
1601 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1602 __u16 moduleid, __u16 value, __u8 *data, int size)
1603 {
1604 int status;
1605
1606 status = usb_control_msg(tdev->td_serial->dev,
1607 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1608 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1609 value, moduleid, data, size, 1000);
1610
1611 if (status == size)
1612 status = 0;
1613
1614 if (status > 0)
1615 status = -ECOMM;
1616
1617 return status;
1618 }
1619
1620
1621 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1622 __u8 mask, __u8 byte)
1623 {
1624 int status;
1625 unsigned int size;
1626 struct ti_write_data_bytes *data;
1627 struct device *dev = &tdev->td_serial->dev->dev;
1628
1629 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1630 __func__, addr, mask, byte);
1631
1632 size = sizeof(struct ti_write_data_bytes) + 2;
1633 data = kmalloc(size, GFP_KERNEL);
1634 if (!data) {
1635 dev_err(dev, "%s - out of memory\n", __func__);
1636 return -ENOMEM;
1637 }
1638
1639 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1640 data->bDataType = TI_RW_DATA_BYTE;
1641 data->bDataCounter = 1;
1642 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1643 data->wBaseAddrLo = cpu_to_be16(addr);
1644 data->bData[0] = mask;
1645 data->bData[1] = byte;
1646
1647 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1648 (__u8 *)data, size);
1649
1650 if (status < 0)
1651 dev_err(dev, "%s - failed, %d\n", __func__, status);
1652
1653 kfree(data);
1654
1655 return status;
1656 }
1657
1658 static int ti_do_download(struct usb_device *dev, int pipe,
1659 u8 *buffer, int size)
1660 {
1661 int pos;
1662 u8 cs = 0;
1663 int done;
1664 struct ti_firmware_header *header;
1665 int status = 0;
1666 int len;
1667
1668 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1669 cs = (__u8)(cs + buffer[pos]);
1670
1671 header = (struct ti_firmware_header *)buffer;
1672 header->wLength = cpu_to_le16((__u16)(size
1673 - sizeof(struct ti_firmware_header)));
1674 header->bCheckSum = cs;
1675
1676 dbg("%s - downloading firmware", __func__);
1677 for (pos = 0; pos < size; pos += done) {
1678 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1679 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1680 &done, 1000);
1681 if (status)
1682 break;
1683 }
1684 return status;
1685 }
1686
1687 static int ti_download_firmware(struct ti_device *tdev)
1688 {
1689 int status;
1690 int buffer_size;
1691 __u8 *buffer;
1692 struct usb_device *dev = tdev->td_serial->dev;
1693 unsigned int pipe = usb_sndbulkpipe(dev,
1694 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1695 const struct firmware *fw_p;
1696 char buf[32];
1697
1698 dbg("%s\n", __func__);
1699 /* try ID specific firmware first, then try generic firmware */
1700 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1701 dev->descriptor.idProduct);
1702 if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1703 buf[0] = '\0';
1704 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1705 switch (dev->descriptor.idProduct) {
1706 case MTS_CDMA_PRODUCT_ID:
1707 strcpy(buf, "mts_cdma.fw");
1708 break;
1709 case MTS_GSM_PRODUCT_ID:
1710 strcpy(buf, "mts_gsm.fw");
1711 break;
1712 case MTS_EDGE_PRODUCT_ID:
1713 strcpy(buf, "mts_edge.fw");
1714 break;
1715 case MTS_MT9234MU_PRODUCT_ID:
1716 strcpy(buf, "mts_mt9234mu.fw");
1717 break;
1718 case MTS_MT9234ZBA_PRODUCT_ID:
1719 strcpy(buf, "mts_mt9234zba.fw");
1720 break;
1721 case MTS_MT9234ZBAOLD_PRODUCT_ID:
1722 strcpy(buf, "mts_mt9234zba.fw");
1723 break; }
1724 }
1725 if (buf[0] == '\0') {
1726 if (tdev->td_is_3410)
1727 strcpy(buf, "ti_3410.fw");
1728 else
1729 strcpy(buf, "ti_5052.fw");
1730 }
1731 status = request_firmware(&fw_p, buf, &dev->dev);
1732 }
1733 if (status) {
1734 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1735 return -ENOENT;
1736 }
1737 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1738 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1739 return -ENOENT;
1740 }
1741
1742 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1743 buffer = kmalloc(buffer_size, GFP_KERNEL);
1744 if (buffer) {
1745 memcpy(buffer, fw_p->data, fw_p->size);
1746 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1747 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1748 kfree(buffer);
1749 } else {
1750 dbg("%s ENOMEM\n", __func__);
1751 status = -ENOMEM;
1752 }
1753 release_firmware(fw_p);
1754 if (status) {
1755 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1756 __func__, status);
1757 return status;
1758 }
1759
1760 dbg("%s - download successful", __func__);
1761
1762 return 0;
1763 }
1764
1765
1766 /* Circular Buffer Functions */
1767
1768 /*
1769 * ti_buf_alloc
1770 *
1771 * Allocate a circular buffer and all associated memory.
1772 */
1773
1774 static struct circ_buf *ti_buf_alloc(void)
1775 {
1776 struct circ_buf *cb;
1777
1778 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1779 if (cb == NULL)
1780 return NULL;
1781
1782 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1783 if (cb->buf == NULL) {
1784 kfree(cb);
1785 return NULL;
1786 }
1787
1788 ti_buf_clear(cb);
1789
1790 return cb;
1791 }
1792
1793
1794 /*
1795 * ti_buf_free
1796 *
1797 * Free the buffer and all associated memory.
1798 */
1799
1800 static void ti_buf_free(struct circ_buf *cb)
1801 {
1802 kfree(cb->buf);
1803 kfree(cb);
1804 }
1805
1806
1807 /*
1808 * ti_buf_clear
1809 *
1810 * Clear out all data in the circular buffer.
1811 */
1812
1813 static void ti_buf_clear(struct circ_buf *cb)
1814 {
1815 cb->head = cb->tail = 0;
1816 }
1817
1818
1819 /*
1820 * ti_buf_data_avail
1821 *
1822 * Return the number of bytes of data available in the circular
1823 * buffer.
1824 */
1825
1826 static int ti_buf_data_avail(struct circ_buf *cb)
1827 {
1828 return CIRC_CNT(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1829 }
1830
1831
1832 /*
1833 * ti_buf_space_avail
1834 *
1835 * Return the number of bytes of space available in the circular
1836 * buffer.
1837 */
1838
1839 static int ti_buf_space_avail(struct circ_buf *cb)
1840 {
1841 return CIRC_SPACE(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1842 }
1843
1844
1845 /*
1846 * ti_buf_put
1847 *
1848 * Copy data data from a user buffer and put it into the circular buffer.
1849 * Restrict to the amount of space available.
1850 *
1851 * Return the number of bytes copied.
1852 */
1853
1854 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1855 {
1856 int c, ret = 0;
1857
1858 while (1) {
1859 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1860 if (count < c)
1861 c = count;
1862 if (c <= 0)
1863 break;
1864 memcpy(cb->buf + cb->head, buf, c);
1865 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1866 buf += c;
1867 count -= c;
1868 ret += c;
1869 }
1870
1871 return ret;
1872 }
1873
1874
1875 /*
1876 * ti_buf_get
1877 *
1878 * Get data from the circular buffer and copy to the given buffer.
1879 * Restrict to the amount of data available.
1880 *
1881 * Return the number of bytes copied.
1882 */
1883
1884 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1885 {
1886 int c, ret = 0;
1887
1888 while (1) {
1889 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1890 if (count < c)
1891 c = count;
1892 if (c <= 0)
1893 break;
1894 memcpy(buf, cb->buf + cb->tail, c);
1895 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1896 buf += c;
1897 count -= c;
1898 ret += c;
1899 }
1900
1901 return ret;
1902 }
Linux kernel - Deliverables
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