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usb: Netlogic: Use CPU_XLR in place of NLM_XLR
[zen-stable.git] / drivers / usb / serial / ti_usb_3410_5052.c
blob4af21f46096e564fcfe767c327aab0378a0c845d
1 /* vi: ts=8 sw=8
2 *
3 * TI 3410/5052 USB Serial Driver
4 *
5 * Copyright (C) 2004 Texas Instruments
6 *
7 * This driver is based on the Linux io_ti driver, which is
8 * Copyright (C) 2000-2002 Inside Out Networks
9 * Copyright (C) 2001-2002 Greg Kroah-Hartman
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * For questions or problems with this driver, contact Texas Instruments
17 * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
18 * Peter Berger <pberger@brimson.com>.
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/firmware.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <linux/tty.h>
27 #include <linux/tty_driver.h>
28 #include <linux/tty_flip.h>
29 #include <linux/module.h>
30 #include <linux/spinlock.h>
31 #include <linux/ioctl.h>
32 #include <linux/serial.h>
33 #include <linux/kfifo.h>
34 #include <linux/mutex.h>
35 #include <linux/uaccess.h>
36 #include <linux/usb.h>
37 #include <linux/usb/serial.h>
38
39 #include "ti_usb_3410_5052.h"
40
41 /* Defines */
42
43 #define TI_DRIVER_VERSION "v0.10"
44 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
45 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
46
47 #define TI_FIRMWARE_BUF_SIZE 16284
48
49 #define TI_WRITE_BUF_SIZE 1024
50
51 #define TI_TRANSFER_TIMEOUT 2
52
53 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
54
55 /* supported setserial flags */
56 #define TI_SET_SERIAL_FLAGS 0
57
58 /* read urb states */
59 #define TI_READ_URB_RUNNING 0
60 #define TI_READ_URB_STOPPING 1
61 #define TI_READ_URB_STOPPED 2
62
63 #define TI_EXTRA_VID_PID_COUNT 5
64
65
66 /* Structures */
67
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 kfifo write_fifo;
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,
110 unsigned int cmd, unsigned long arg);
111 static int ti_get_icount(struct tty_struct *tty,
112 struct serial_icounter_struct *icount);
113 static void ti_set_termios(struct tty_struct *tty,
114 struct usb_serial_port *port, struct ktermios *old_termios);
115 static int ti_tiocmget(struct tty_struct *tty);
116 static int ti_tiocmset(struct tty_struct *tty,
117 unsigned int set, unsigned int clear);
118 static void ti_break(struct tty_struct *tty, int break_state);
119 static void ti_interrupt_callback(struct urb *urb);
120 static void ti_bulk_in_callback(struct urb *urb);
121 static void ti_bulk_out_callback(struct urb *urb);
122
123 static void ti_recv(struct device *dev, struct tty_struct *tty,
124 unsigned char *data, int length);
125 static void ti_send(struct ti_port *tport);
126 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
127 static int ti_get_lsr(struct ti_port *tport);
128 static int ti_get_serial_info(struct ti_port *tport,
129 struct serial_struct __user *ret_arg);
130 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
131 struct serial_struct __user *new_arg);
132 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
133
134 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
135
136 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
137 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
138
139 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
140 __u16 moduleid, __u16 value, __u8 *data, int size);
141 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
142 __u16 moduleid, __u16 value, __u8 *data, int size);
143
144 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
145 __u8 mask, __u8 byte);
146
147 static int ti_download_firmware(struct ti_device *tdev);
148
149
150 /* Data */
151
152 /* module parameters */
153 static int debug;
154 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
155 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
156 static unsigned int vendor_3410_count;
157 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
158 static unsigned int product_3410_count;
159 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
160 static unsigned int vendor_5052_count;
161 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
162 static unsigned int product_5052_count;
163
164 /* supported devices */
165 /* the array dimension is the number of default entries plus */
166 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
167 /* null entry */
168 static struct usb_device_id ti_id_table_3410[13+TI_EXTRA_VID_PID_COUNT+1] = {
169 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
170 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
171 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
172 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
173 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
174 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
175 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
176 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
177 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
178 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
179 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
180 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
181 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
182 };
183
184 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
185 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
186 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
187 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
188 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
189 };
190
191 static struct usb_device_id ti_id_table_combined[17+2*TI_EXTRA_VID_PID_COUNT+1] = {
192 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
193 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
194 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
195 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
196 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
197 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
198 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
199 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
200 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
201 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
202 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
203 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
204 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
205 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
206 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
207 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
208 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
209 { }
210 };
211
212 static struct usb_driver ti_usb_driver = {
213 .name = "ti_usb_3410_5052",
214 .probe = usb_serial_probe,
215 .disconnect = usb_serial_disconnect,
216 .id_table = ti_id_table_combined,
217 .no_dynamic_id = 1,
218 };
219
220 static struct usb_serial_driver ti_1port_device = {
221 .driver = {
222 .owner = THIS_MODULE,
223 .name = "ti_usb_3410_5052_1",
224 },
225 .description = "TI USB 3410 1 port adapter",
226 .usb_driver = &ti_usb_driver,
227 .id_table = ti_id_table_3410,
228 .num_ports = 1,
229 .attach = ti_startup,
230 .release = ti_release,
231 .open = ti_open,
232 .close = ti_close,
233 .write = ti_write,
234 .write_room = ti_write_room,
235 .chars_in_buffer = ti_chars_in_buffer,
236 .throttle = ti_throttle,
237 .unthrottle = ti_unthrottle,
238 .ioctl = ti_ioctl,
239 .set_termios = ti_set_termios,
240 .tiocmget = ti_tiocmget,
241 .tiocmset = ti_tiocmset,
242 .get_icount = ti_get_icount,
243 .break_ctl = ti_break,
244 .read_int_callback = ti_interrupt_callback,
245 .read_bulk_callback = ti_bulk_in_callback,
246 .write_bulk_callback = ti_bulk_out_callback,
247 };
248
249 static struct usb_serial_driver ti_2port_device = {
250 .driver = {
251 .owner = THIS_MODULE,
252 .name = "ti_usb_3410_5052_2",
253 },
254 .description = "TI USB 5052 2 port adapter",
255 .usb_driver = &ti_usb_driver,
256 .id_table = ti_id_table_5052,
257 .num_ports = 2,
258 .attach = ti_startup,
259 .release = ti_release,
260 .open = ti_open,
261 .close = ti_close,
262 .write = ti_write,
263 .write_room = ti_write_room,
264 .chars_in_buffer = ti_chars_in_buffer,
265 .throttle = ti_throttle,
266 .unthrottle = ti_unthrottle,
267 .ioctl = ti_ioctl,
268 .set_termios = ti_set_termios,
269 .tiocmget = ti_tiocmget,
270 .tiocmset = ti_tiocmset,
271 .get_icount = ti_get_icount,
272 .break_ctl = ti_break,
273 .read_int_callback = ti_interrupt_callback,
274 .read_bulk_callback = ti_bulk_in_callback,
275 .write_bulk_callback = ti_bulk_out_callback,
276 };
277
278
279 /* Module */
280
281 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
282 MODULE_DESCRIPTION(TI_DRIVER_DESC);
283 MODULE_VERSION(TI_DRIVER_VERSION);
284 MODULE_LICENSE("GPL");
285
286 MODULE_FIRMWARE("ti_3410.fw");
287 MODULE_FIRMWARE("ti_5052.fw");
288 MODULE_FIRMWARE("mts_cdma.fw");
289 MODULE_FIRMWARE("mts_gsm.fw");
290 MODULE_FIRMWARE("mts_edge.fw");
291 MODULE_FIRMWARE("mts_mt9234mu.fw");
292 MODULE_FIRMWARE("mts_mt9234zba.fw");
293
294 module_param(debug, bool, S_IRUGO | S_IWUSR);
295 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
296
297 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
298 MODULE_PARM_DESC(closing_wait,
299 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
300
301 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
302 MODULE_PARM_DESC(vendor_3410,
303 "Vendor ids for 3410 based devices, 1-5 short integers");
304 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
305 MODULE_PARM_DESC(product_3410,
306 "Product ids for 3410 based devices, 1-5 short integers");
307 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
308 MODULE_PARM_DESC(vendor_5052,
309 "Vendor ids for 5052 based devices, 1-5 short integers");
310 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
311 MODULE_PARM_DESC(product_5052,
312 "Product ids for 5052 based devices, 1-5 short integers");
313
314 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
315
316
317 /* Functions */
318
319 static int __init ti_init(void)
320 {
321 int i, j, c;
322 int ret;
323
324 /* insert extra vendor and product ids */
325 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
326 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
327 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
328 ti_id_table_3410[j].idVendor = vendor_3410[i];
329 ti_id_table_3410[j].idProduct = product_3410[i];
330 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
331 ti_id_table_combined[c].idVendor = vendor_3410[i];
332 ti_id_table_combined[c].idProduct = product_3410[i];
333 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
334 }
335 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
336 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
337 ti_id_table_5052[j].idVendor = vendor_5052[i];
338 ti_id_table_5052[j].idProduct = product_5052[i];
339 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
340 ti_id_table_combined[c].idVendor = vendor_5052[i];
341 ti_id_table_combined[c].idProduct = product_5052[i];
342 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
343 }
344
345 ret = usb_serial_register(&ti_1port_device);
346 if (ret)
347 goto failed_1port;
348 ret = usb_serial_register(&ti_2port_device);
349 if (ret)
350 goto failed_2port;
351
352 ret = usb_register(&ti_usb_driver);
353 if (ret)
354 goto failed_usb;
355
356 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
357 TI_DRIVER_DESC "\n");
358
359 return 0;
360
361 failed_usb:
362 usb_serial_deregister(&ti_2port_device);
363 failed_2port:
364 usb_serial_deregister(&ti_1port_device);
365 failed_1port:
366 return ret;
367 }
368
369
370 static void __exit ti_exit(void)
371 {
372 usb_deregister(&ti_usb_driver);
373 usb_serial_deregister(&ti_1port_device);
374 usb_serial_deregister(&ti_2port_device);
375 }
376
377
378 module_init(ti_init);
379 module_exit(ti_exit);
380
381
382 static int ti_startup(struct usb_serial *serial)
383 {
384 struct ti_device *tdev;
385 struct ti_port *tport;
386 struct usb_device *dev = serial->dev;
387 int status;
388 int i;
389
390
391 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
392 __func__, le16_to_cpu(dev->descriptor.idProduct),
393 dev->descriptor.bNumConfigurations,
394 dev->actconfig->desc.bConfigurationValue);
395
396 /* create device structure */
397 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
398 if (tdev == NULL) {
399 dev_err(&dev->dev, "%s - out of memory\n", __func__);
400 return -ENOMEM;
401 }
402 mutex_init(&tdev->td_open_close_lock);
403 tdev->td_serial = serial;
404 usb_set_serial_data(serial, tdev);
405
406 /* determine device type */
407 if (usb_match_id(serial->interface, ti_id_table_3410))
408 tdev->td_is_3410 = 1;
409 dbg("%s - device type is %s", __func__,
410 tdev->td_is_3410 ? "3410" : "5052");
411
412 /* if we have only 1 configuration, download firmware */
413 if (dev->descriptor.bNumConfigurations == 1) {
414 if ((status = ti_download_firmware(tdev)) != 0)
415 goto free_tdev;
416
417 /* 3410 must be reset, 5052 resets itself */
418 if (tdev->td_is_3410) {
419 msleep_interruptible(100);
420 usb_reset_device(dev);
421 }
422
423 status = -ENODEV;
424 goto free_tdev;
425 }
426
427 /* the second configuration must be set */
428 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
429 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
430 status = status ? status : -ENODEV;
431 goto free_tdev;
432 }
433
434 /* set up port structures */
435 for (i = 0; i < serial->num_ports; ++i) {
436 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
437 if (tport == NULL) {
438 dev_err(&dev->dev, "%s - out of memory\n", __func__);
439 status = -ENOMEM;
440 goto free_tports;
441 }
442 spin_lock_init(&tport->tp_lock);
443 tport->tp_uart_base_addr = (i == 0 ?
444 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
445 tport->tp_closing_wait = closing_wait;
446 init_waitqueue_head(&tport->tp_msr_wait);
447 init_waitqueue_head(&tport->tp_write_wait);
448 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
449 GFP_KERNEL)) {
450 dev_err(&dev->dev, "%s - out of memory\n", __func__);
451 kfree(tport);
452 status = -ENOMEM;
453 goto free_tports;
454 }
455 tport->tp_port = serial->port[i];
456 tport->tp_tdev = tdev;
457 usb_set_serial_port_data(serial->port[i], tport);
458 tport->tp_uart_mode = 0; /* default is RS232 */
459 }
460
461 return 0;
462
463 free_tports:
464 for (--i; i >= 0; --i) {
465 tport = usb_get_serial_port_data(serial->port[i]);
466 kfifo_free(&tport->write_fifo);
467 kfree(tport);
468 usb_set_serial_port_data(serial->port[i], NULL);
469 }
470 free_tdev:
471 kfree(tdev);
472 usb_set_serial_data(serial, NULL);
473 return status;
474 }
475
476
477 static void ti_release(struct usb_serial *serial)
478 {
479 int i;
480 struct ti_device *tdev = usb_get_serial_data(serial);
481 struct ti_port *tport;
482
483 dbg("%s", __func__);
484
485 for (i = 0; i < serial->num_ports; ++i) {
486 tport = usb_get_serial_port_data(serial->port[i]);
487 if (tport) {
488 kfifo_free(&tport->write_fifo);
489 kfree(tport);
490 }
491 }
492
493 kfree(tdev);
494 }
495
496
497 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
498 {
499 struct ti_port *tport = usb_get_serial_port_data(port);
500 struct ti_device *tdev;
501 struct usb_device *dev;
502 struct urb *urb;
503 int port_number;
504 int status;
505 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
506 TI_PIPE_TIMEOUT_ENABLE |
507 (TI_TRANSFER_TIMEOUT << 2));
508
509 dbg("%s - port %d", __func__, port->number);
510
511 if (tport == NULL)
512 return -ENODEV;
513
514 dev = port->serial->dev;
515 tdev = tport->tp_tdev;
516
517 /* only one open on any port on a device at a time */
518 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
519 return -ERESTARTSYS;
520
521 port_number = port->number - port->serial->minor;
522
523 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
524
525 tport->tp_msr = 0;
526 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
527
528 /* start interrupt urb the first time a port is opened on this device */
529 if (tdev->td_open_port_count == 0) {
530 dbg("%s - start interrupt in urb", __func__);
531 urb = tdev->td_serial->port[0]->interrupt_in_urb;
532 if (!urb) {
533 dev_err(&port->dev, "%s - no interrupt urb\n",
534 __func__);
535 status = -EINVAL;
536 goto release_lock;
537 }
538 urb->context = tdev;
539 status = usb_submit_urb(urb, GFP_KERNEL);
540 if (status) {
541 dev_err(&port->dev,
542 "%s - submit interrupt urb failed, %d\n",
543 __func__, status);
544 goto release_lock;
545 }
546 }
547
548 if (tty)
549 ti_set_termios(tty, port, tty->termios);
550
551 dbg("%s - sending TI_OPEN_PORT", __func__);
552 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
553 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
554 if (status) {
555 dev_err(&port->dev, "%s - cannot send open command, %d\n",
556 __func__, status);
557 goto unlink_int_urb;
558 }
559
560 dbg("%s - sending TI_START_PORT", __func__);
561 status = ti_command_out_sync(tdev, TI_START_PORT,
562 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
563 if (status) {
564 dev_err(&port->dev, "%s - cannot send start command, %d\n",
565 __func__, status);
566 goto unlink_int_urb;
567 }
568
569 dbg("%s - sending TI_PURGE_PORT", __func__);
570 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
571 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
572 if (status) {
573 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
574 __func__, status);
575 goto unlink_int_urb;
576 }
577 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
578 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
579 if (status) {
580 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
581 __func__, status);
582 goto unlink_int_urb;
583 }
584
585 /* reset the data toggle on the bulk endpoints to work around bug in
586 * host controllers where things get out of sync some times */
587 usb_clear_halt(dev, port->write_urb->pipe);
588 usb_clear_halt(dev, port->read_urb->pipe);
589
590 if (tty)
591 ti_set_termios(tty, port, tty->termios);
592
593 dbg("%s - sending TI_OPEN_PORT (2)", __func__);
594 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
595 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
596 if (status) {
597 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
598 __func__, status);
599 goto unlink_int_urb;
600 }
601
602 dbg("%s - sending TI_START_PORT (2)", __func__);
603 status = ti_command_out_sync(tdev, TI_START_PORT,
604 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
605 if (status) {
606 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
607 __func__, status);
608 goto unlink_int_urb;
609 }
610
611 /* start read urb */
612 dbg("%s - start read urb", __func__);
613 urb = port->read_urb;
614 if (!urb) {
615 dev_err(&port->dev, "%s - no read urb\n", __func__);
616 status = -EINVAL;
617 goto unlink_int_urb;
618 }
619 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
620 urb->context = tport;
621 status = usb_submit_urb(urb, GFP_KERNEL);
622 if (status) {
623 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
624 __func__, status);
625 goto unlink_int_urb;
626 }
627
628 tport->tp_is_open = 1;
629 ++tdev->td_open_port_count;
630
631 goto release_lock;
632
633 unlink_int_urb:
634 if (tdev->td_open_port_count == 0)
635 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
636 release_lock:
637 mutex_unlock(&tdev->td_open_close_lock);
638 dbg("%s - exit %d", __func__, status);
639 return status;
640 }
641
642
643 static void ti_close(struct usb_serial_port *port)
644 {
645 struct ti_device *tdev;
646 struct ti_port *tport;
647 int port_number;
648 int status;
649 int do_unlock;
650
651 dbg("%s - port %d", __func__, port->number);
652
653 tdev = usb_get_serial_data(port->serial);
654 tport = usb_get_serial_port_data(port);
655 if (tdev == NULL || tport == NULL)
656 return;
657
658 tport->tp_is_open = 0;
659
660 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
661
662 usb_kill_urb(port->read_urb);
663 usb_kill_urb(port->write_urb);
664 tport->tp_write_urb_in_use = 0;
665
666 port_number = port->number - port->serial->minor;
667
668 dbg("%s - sending TI_CLOSE_PORT", __func__);
669 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
670 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
671 if (status)
672 dev_err(&port->dev,
673 "%s - cannot send close port command, %d\n"
674 , __func__, status);
675
676 /* if mutex_lock is interrupted, continue anyway */
677 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
678 --tport->tp_tdev->td_open_port_count;
679 if (tport->tp_tdev->td_open_port_count <= 0) {
680 /* last port is closed, shut down interrupt urb */
681 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
682 tport->tp_tdev->td_open_port_count = 0;
683 }
684 if (do_unlock)
685 mutex_unlock(&tdev->td_open_close_lock);
686
687 dbg("%s - exit", __func__);
688 }
689
690
691 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
692 const unsigned char *data, int count)
693 {
694 struct ti_port *tport = usb_get_serial_port_data(port);
695
696 dbg("%s - port %d", __func__, port->number);
697
698 if (count == 0) {
699 dbg("%s - write request of 0 bytes", __func__);
700 return 0;
701 }
702
703 if (tport == NULL || !tport->tp_is_open)
704 return -ENODEV;
705
706 count = kfifo_in_locked(&tport->write_fifo, data, count,
707 &tport->tp_lock);
708 ti_send(tport);
709
710 return count;
711 }
712
713
714 static int ti_write_room(struct tty_struct *tty)
715 {
716 struct usb_serial_port *port = tty->driver_data;
717 struct ti_port *tport = usb_get_serial_port_data(port);
718 int room = 0;
719 unsigned long flags;
720
721 dbg("%s - port %d", __func__, port->number);
722
723 if (tport == NULL)
724 return 0;
725
726 spin_lock_irqsave(&tport->tp_lock, flags);
727 room = kfifo_avail(&tport->write_fifo);
728 spin_unlock_irqrestore(&tport->tp_lock, flags);
729
730 dbg("%s - returns %d", __func__, room);
731 return room;
732 }
733
734
735 static int ti_chars_in_buffer(struct tty_struct *tty)
736 {
737 struct usb_serial_port *port = tty->driver_data;
738 struct ti_port *tport = usb_get_serial_port_data(port);
739 int chars = 0;
740 unsigned long flags;
741
742 dbg("%s - port %d", __func__, port->number);
743
744 if (tport == NULL)
745 return 0;
746
747 spin_lock_irqsave(&tport->tp_lock, flags);
748 chars = kfifo_len(&tport->write_fifo);
749 spin_unlock_irqrestore(&tport->tp_lock, flags);
750
751 dbg("%s - returns %d", __func__, chars);
752 return chars;
753 }
754
755
756 static void ti_throttle(struct tty_struct *tty)
757 {
758 struct usb_serial_port *port = tty->driver_data;
759 struct ti_port *tport = usb_get_serial_port_data(port);
760
761 dbg("%s - port %d", __func__, port->number);
762
763 if (tport == NULL)
764 return;
765
766 if (I_IXOFF(tty) || C_CRTSCTS(tty))
767 ti_stop_read(tport, tty);
768
769 }
770
771
772 static void ti_unthrottle(struct tty_struct *tty)
773 {
774 struct usb_serial_port *port = tty->driver_data;
775 struct ti_port *tport = usb_get_serial_port_data(port);
776 int status;
777
778 dbg("%s - port %d", __func__, port->number);
779
780 if (tport == NULL)
781 return;
782
783 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
784 status = ti_restart_read(tport, tty);
785 if (status)
786 dev_err(&port->dev, "%s - cannot restart read, %d\n",
787 __func__, status);
788 }
789 }
790
791 static int ti_get_icount(struct tty_struct *tty,
792 struct serial_icounter_struct *icount)
793 {
794 struct usb_serial_port *port = tty->driver_data;
795 struct ti_port *tport = usb_get_serial_port_data(port);
796 struct async_icount cnow = tport->tp_icount;
797
798 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
799 __func__, port->number,
800 cnow.rx, cnow.tx);
801
802 icount->cts = cnow.cts;
803 icount->dsr = cnow.dsr;
804 icount->rng = cnow.rng;
805 icount->dcd = cnow.dcd;
806 icount->rx = cnow.rx;
807 icount->tx = cnow.tx;
808 icount->frame = cnow.frame;
809 icount->overrun = cnow.overrun;
810 icount->parity = cnow.parity;
811 icount->brk = cnow.brk;
812 icount->buf_overrun = cnow.buf_overrun;
813
814 return 0;
815 }
816
817 static int ti_ioctl(struct tty_struct *tty,
818 unsigned int cmd, unsigned long arg)
819 {
820 struct usb_serial_port *port = tty->driver_data;
821 struct ti_port *tport = usb_get_serial_port_data(port);
822 struct async_icount cnow;
823 struct async_icount cprev;
824
825 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
826
827 if (tport == NULL)
828 return -ENODEV;
829
830 switch (cmd) {
831 case TIOCGSERIAL:
832 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
833 return ti_get_serial_info(tport,
834 (struct serial_struct __user *)arg);
835 case TIOCSSERIAL:
836 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
837 return ti_set_serial_info(tty, tport,
838 (struct serial_struct __user *)arg);
839 case TIOCMIWAIT:
840 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
841 cprev = tport->tp_icount;
842 while (1) {
843 interruptible_sleep_on(&tport->tp_msr_wait);
844 if (signal_pending(current))
845 return -ERESTARTSYS;
846 cnow = tport->tp_icount;
847 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
848 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
849 return -EIO; /* no change => error */
850 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
851 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
852 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
853 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
854 return 0;
855 cprev = cnow;
856 }
857 break;
858 }
859 return -ENOIOCTLCMD;
860 }
861
862
863 static void ti_set_termios(struct tty_struct *tty,
864 struct usb_serial_port *port, struct ktermios *old_termios)
865 {
866 struct ti_port *tport = usb_get_serial_port_data(port);
867 struct ti_uart_config *config;
868 tcflag_t cflag, iflag;
869 int baud;
870 int status;
871 int port_number = port->number - port->serial->minor;
872 unsigned int mcr;
873
874 dbg("%s - port %d", __func__, port->number);
875
876 cflag = tty->termios->c_cflag;
877 iflag = tty->termios->c_iflag;
878
879 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
880 dbg("%s - old clfag %08x, old iflag %08x", __func__,
881 old_termios->c_cflag, old_termios->c_iflag);
882
883 if (tport == NULL)
884 return;
885
886 config = kmalloc(sizeof(*config), GFP_KERNEL);
887 if (!config) {
888 dev_err(&port->dev, "%s - out of memory\n", __func__);
889 return;
890 }
891
892 config->wFlags = 0;
893
894 /* these flags must be set */
895 config->wFlags |= TI_UART_ENABLE_MS_INTS;
896 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
897 config->bUartMode = (__u8)(tport->tp_uart_mode);
898
899 switch (cflag & CSIZE) {
900 case CS5:
901 config->bDataBits = TI_UART_5_DATA_BITS;
902 break;
903 case CS6:
904 config->bDataBits = TI_UART_6_DATA_BITS;
905 break;
906 case CS7:
907 config->bDataBits = TI_UART_7_DATA_BITS;
908 break;
909 default:
910 case CS8:
911 config->bDataBits = TI_UART_8_DATA_BITS;
912 break;
913 }
914
915 /* CMSPAR isn't supported by this driver */
916 tty->termios->c_cflag &= ~CMSPAR;
917
918 if (cflag & PARENB) {
919 if (cflag & PARODD) {
920 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
921 config->bParity = TI_UART_ODD_PARITY;
922 } else {
923 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
924 config->bParity = TI_UART_EVEN_PARITY;
925 }
926 } else {
927 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
928 config->bParity = TI_UART_NO_PARITY;
929 }
930
931 if (cflag & CSTOPB)
932 config->bStopBits = TI_UART_2_STOP_BITS;
933 else
934 config->bStopBits = TI_UART_1_STOP_BITS;
935
936 if (cflag & CRTSCTS) {
937 /* RTS flow control must be off to drop RTS for baud rate B0 */
938 if ((cflag & CBAUD) != B0)
939 config->wFlags |= TI_UART_ENABLE_RTS_IN;
940 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
941 } else {
942 tty->hw_stopped = 0;
943 ti_restart_read(tport, tty);
944 }
945
946 if (I_IXOFF(tty) || I_IXON(tty)) {
947 config->cXon = START_CHAR(tty);
948 config->cXoff = STOP_CHAR(tty);
949
950 if (I_IXOFF(tty))
951 config->wFlags |= TI_UART_ENABLE_X_IN;
952 else
953 ti_restart_read(tport, tty);
954
955 if (I_IXON(tty))
956 config->wFlags |= TI_UART_ENABLE_X_OUT;
957 }
958
959 baud = tty_get_baud_rate(tty);
960 if (!baud)
961 baud = 9600;
962 if (tport->tp_tdev->td_is_3410)
963 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
964 else
965 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
966
967 /* FIXME: Should calculate resulting baud here and report it back */
968 if ((cflag & CBAUD) != B0)
969 tty_encode_baud_rate(tty, baud, baud);
970
971 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
972 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
973
974 cpu_to_be16s(&config->wBaudRate);
975 cpu_to_be16s(&config->wFlags);
976
977 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
978 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
979 sizeof(*config));
980 if (status)
981 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
982 __func__, port_number, status);
983
984 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
985 mcr = tport->tp_shadow_mcr;
986 /* if baud rate is B0, clear RTS and DTR */
987 if ((cflag & CBAUD) == B0)
988 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
989 status = ti_set_mcr(tport, mcr);
990 if (status)
991 dev_err(&port->dev,
992 "%s - cannot set modem control on port %d, %d\n",
993 __func__, port_number, status);
994
995 kfree(config);
996 }
997
998
999 static int ti_tiocmget(struct tty_struct *tty)
1000 {
1001 struct usb_serial_port *port = tty->driver_data;
1002 struct ti_port *tport = usb_get_serial_port_data(port);
1003 unsigned int result;
1004 unsigned int msr;
1005 unsigned int mcr;
1006 unsigned long flags;
1007
1008 dbg("%s - port %d", __func__, port->number);
1009
1010 if (tport == NULL)
1011 return -ENODEV;
1012
1013 spin_lock_irqsave(&tport->tp_lock, flags);
1014 msr = tport->tp_msr;
1015 mcr = tport->tp_shadow_mcr;
1016 spin_unlock_irqrestore(&tport->tp_lock, flags);
1017
1018 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1019 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1020 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1021 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1022 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1023 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1024 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1025
1026 dbg("%s - 0x%04X", __func__, result);
1027
1028 return result;
1029 }
1030
1031
1032 static int ti_tiocmset(struct tty_struct *tty,
1033 unsigned int set, unsigned int clear)
1034 {
1035 struct usb_serial_port *port = tty->driver_data;
1036 struct ti_port *tport = usb_get_serial_port_data(port);
1037 unsigned int mcr;
1038 unsigned long flags;
1039
1040 dbg("%s - port %d", __func__, port->number);
1041
1042 if (tport == NULL)
1043 return -ENODEV;
1044
1045 spin_lock_irqsave(&tport->tp_lock, flags);
1046 mcr = tport->tp_shadow_mcr;
1047
1048 if (set & TIOCM_RTS)
1049 mcr |= TI_MCR_RTS;
1050 if (set & TIOCM_DTR)
1051 mcr |= TI_MCR_DTR;
1052 if (set & TIOCM_LOOP)
1053 mcr |= TI_MCR_LOOP;
1054
1055 if (clear & TIOCM_RTS)
1056 mcr &= ~TI_MCR_RTS;
1057 if (clear & TIOCM_DTR)
1058 mcr &= ~TI_MCR_DTR;
1059 if (clear & TIOCM_LOOP)
1060 mcr &= ~TI_MCR_LOOP;
1061 spin_unlock_irqrestore(&tport->tp_lock, flags);
1062
1063 return ti_set_mcr(tport, mcr);
1064 }
1065
1066
1067 static void ti_break(struct tty_struct *tty, int break_state)
1068 {
1069 struct usb_serial_port *port = tty->driver_data;
1070 struct ti_port *tport = usb_get_serial_port_data(port);
1071 int status;
1072
1073 dbg("%s - state = %d", __func__, break_state);
1074
1075 if (tport == NULL)
1076 return;
1077
1078 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1079
1080 status = ti_write_byte(tport->tp_tdev,
1081 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1082 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1083
1084 if (status)
1085 dbg("%s - error setting break, %d", __func__, status);
1086 }
1087
1088
1089 static void ti_interrupt_callback(struct urb *urb)
1090 {
1091 struct ti_device *tdev = urb->context;
1092 struct usb_serial_port *port;
1093 struct usb_serial *serial = tdev->td_serial;
1094 struct ti_port *tport;
1095 struct device *dev = &urb->dev->dev;
1096 unsigned char *data = urb->transfer_buffer;
1097 int length = urb->actual_length;
1098 int port_number;
1099 int function;
1100 int status = urb->status;
1101 int retval;
1102 __u8 msr;
1103
1104 dbg("%s", __func__);
1105
1106 switch (status) {
1107 case 0:
1108 break;
1109 case -ECONNRESET:
1110 case -ENOENT:
1111 case -ESHUTDOWN:
1112 dbg("%s - urb shutting down, %d", __func__, status);
1113 tdev->td_urb_error = 1;
1114 return;
1115 default:
1116 dev_err(dev, "%s - nonzero urb status, %d\n",
1117 __func__, status);
1118 tdev->td_urb_error = 1;
1119 goto exit;
1120 }
1121
1122 if (length != 2) {
1123 dbg("%s - bad packet size, %d", __func__, length);
1124 goto exit;
1125 }
1126
1127 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1128 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1129 goto exit;
1130 }
1131
1132 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1133 function = TI_GET_FUNC_FROM_CODE(data[0]);
1134
1135 dbg("%s - port_number %d, function %d, data 0x%02X",
1136 __func__, port_number, function, data[1]);
1137
1138 if (port_number >= serial->num_ports) {
1139 dev_err(dev, "%s - bad port number, %d\n",
1140 __func__, port_number);
1141 goto exit;
1142 }
1143
1144 port = serial->port[port_number];
1145
1146 tport = usb_get_serial_port_data(port);
1147 if (!tport)
1148 goto exit;
1149
1150 switch (function) {
1151 case TI_CODE_DATA_ERROR:
1152 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1153 __func__, port_number, data[1]);
1154 break;
1155
1156 case TI_CODE_MODEM_STATUS:
1157 msr = data[1];
1158 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1159 ti_handle_new_msr(tport, msr);
1160 break;
1161
1162 default:
1163 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1164 __func__, data[1]);
1165 break;
1166 }
1167
1168 exit:
1169 retval = usb_submit_urb(urb, GFP_ATOMIC);
1170 if (retval)
1171 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1172 __func__, retval);
1173 }
1174
1175
1176 static void ti_bulk_in_callback(struct urb *urb)
1177 {
1178 struct ti_port *tport = urb->context;
1179 struct usb_serial_port *port = tport->tp_port;
1180 struct device *dev = &urb->dev->dev;
1181 int status = urb->status;
1182 int retval = 0;
1183 struct tty_struct *tty;
1184
1185 dbg("%s", __func__);
1186
1187 switch (status) {
1188 case 0:
1189 break;
1190 case -ECONNRESET:
1191 case -ENOENT:
1192 case -ESHUTDOWN:
1193 dbg("%s - urb shutting down, %d", __func__, status);
1194 tport->tp_tdev->td_urb_error = 1;
1195 wake_up_interruptible(&tport->tp_write_wait);
1196 return;
1197 default:
1198 dev_err(dev, "%s - nonzero urb status, %d\n",
1199 __func__, status);
1200 tport->tp_tdev->td_urb_error = 1;
1201 wake_up_interruptible(&tport->tp_write_wait);
1202 }
1203
1204 if (status == -EPIPE)
1205 goto exit;
1206
1207 if (status) {
1208 dev_err(dev, "%s - stopping read!\n", __func__);
1209 return;
1210 }
1211
1212 tty = tty_port_tty_get(&port->port);
1213 if (tty) {
1214 if (urb->actual_length) {
1215 usb_serial_debug_data(debug, dev, __func__,
1216 urb->actual_length, urb->transfer_buffer);
1217
1218 if (!tport->tp_is_open)
1219 dbg("%s - port closed, dropping data",
1220 __func__);
1221 else
1222 ti_recv(&urb->dev->dev, tty,
1223 urb->transfer_buffer,
1224 urb->actual_length);
1225 spin_lock(&tport->tp_lock);
1226 tport->tp_icount.rx += urb->actual_length;
1227 spin_unlock(&tport->tp_lock);
1228 }
1229 tty_kref_put(tty);
1230 }
1231
1232 exit:
1233 /* continue to read unless stopping */
1234 spin_lock(&tport->tp_lock);
1235 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1236 retval = usb_submit_urb(urb, GFP_ATOMIC);
1237 else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1238 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1239
1240 spin_unlock(&tport->tp_lock);
1241 if (retval)
1242 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1243 __func__, retval);
1244 }
1245
1246
1247 static void ti_bulk_out_callback(struct urb *urb)
1248 {
1249 struct ti_port *tport = urb->context;
1250 struct usb_serial_port *port = tport->tp_port;
1251 struct device *dev = &urb->dev->dev;
1252 int status = urb->status;
1253
1254 dbg("%s - port %d", __func__, port->number);
1255
1256 tport->tp_write_urb_in_use = 0;
1257
1258 switch (status) {
1259 case 0:
1260 break;
1261 case -ECONNRESET:
1262 case -ENOENT:
1263 case -ESHUTDOWN:
1264 dbg("%s - urb shutting down, %d", __func__, status);
1265 tport->tp_tdev->td_urb_error = 1;
1266 wake_up_interruptible(&tport->tp_write_wait);
1267 return;
1268 default:
1269 dev_err(dev, "%s - nonzero urb status, %d\n",
1270 __func__, status);
1271 tport->tp_tdev->td_urb_error = 1;
1272 wake_up_interruptible(&tport->tp_write_wait);
1273 }
1274
1275 /* send any buffered data */
1276 ti_send(tport);
1277 }
1278
1279
1280 static void ti_recv(struct device *dev, struct tty_struct *tty,
1281 unsigned char *data, int length)
1282 {
1283 int cnt;
1284
1285 do {
1286 cnt = tty_insert_flip_string(tty, data, length);
1287 if (cnt < length) {
1288 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1289 __func__, length - cnt);
1290 if (cnt == 0)
1291 break;
1292 }
1293 tty_flip_buffer_push(tty);
1294 data += cnt;
1295 length -= cnt;
1296 } while (length > 0);
1297
1298 }
1299
1300
1301 static void ti_send(struct ti_port *tport)
1302 {
1303 int count, result;
1304 struct usb_serial_port *port = tport->tp_port;
1305 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1306 unsigned long flags;
1307
1308
1309 dbg("%s - port %d", __func__, port->number);
1310
1311 spin_lock_irqsave(&tport->tp_lock, flags);
1312
1313 if (tport->tp_write_urb_in_use)
1314 goto unlock;
1315
1316 count = kfifo_out(&tport->write_fifo,
1317 port->write_urb->transfer_buffer,
1318 port->bulk_out_size);
1319
1320 if (count == 0)
1321 goto unlock;
1322
1323 tport->tp_write_urb_in_use = 1;
1324
1325 spin_unlock_irqrestore(&tport->tp_lock, flags);
1326
1327 usb_serial_debug_data(debug, &port->dev, __func__, count,
1328 port->write_urb->transfer_buffer);
1329
1330 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1331 usb_sndbulkpipe(port->serial->dev,
1332 port->bulk_out_endpointAddress),
1333 port->write_urb->transfer_buffer, count,
1334 ti_bulk_out_callback, tport);
1335
1336 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1337 if (result) {
1338 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1339 __func__, result);
1340 tport->tp_write_urb_in_use = 0;
1341 /* TODO: reschedule ti_send */
1342 } else {
1343 spin_lock_irqsave(&tport->tp_lock, flags);
1344 tport->tp_icount.tx += count;
1345 spin_unlock_irqrestore(&tport->tp_lock, flags);
1346 }
1347
1348 /* more room in the buffer for new writes, wakeup */
1349 if (tty)
1350 tty_wakeup(tty);
1351 tty_kref_put(tty);
1352 wake_up_interruptible(&tport->tp_write_wait);
1353 return;
1354 unlock:
1355 spin_unlock_irqrestore(&tport->tp_lock, flags);
1356 tty_kref_put(tty);
1357 return;
1358 }
1359
1360
1361 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1362 {
1363 unsigned long flags;
1364 int status;
1365
1366 status = ti_write_byte(tport->tp_tdev,
1367 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1368 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1369
1370 spin_lock_irqsave(&tport->tp_lock, flags);
1371 if (!status)
1372 tport->tp_shadow_mcr = mcr;
1373 spin_unlock_irqrestore(&tport->tp_lock, flags);
1374
1375 return status;
1376 }
1377
1378
1379 static int ti_get_lsr(struct ti_port *tport)
1380 {
1381 int size, status;
1382 struct ti_device *tdev = tport->tp_tdev;
1383 struct usb_serial_port *port = tport->tp_port;
1384 int port_number = port->number - port->serial->minor;
1385 struct ti_port_status *data;
1386
1387 dbg("%s - port %d", __func__, port->number);
1388
1389 size = sizeof(struct ti_port_status);
1390 data = kmalloc(size, GFP_KERNEL);
1391 if (!data) {
1392 dev_err(&port->dev, "%s - out of memory\n", __func__);
1393 return -ENOMEM;
1394 }
1395
1396 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1397 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1398 if (status) {
1399 dev_err(&port->dev,
1400 "%s - get port status command failed, %d\n",
1401 __func__, status);
1402 goto free_data;
1403 }
1404
1405 dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1406
1407 tport->tp_lsr = data->bLSR;
1408
1409 free_data:
1410 kfree(data);
1411 return status;
1412 }
1413
1414
1415 static int ti_get_serial_info(struct ti_port *tport,
1416 struct serial_struct __user *ret_arg)
1417 {
1418 struct usb_serial_port *port = tport->tp_port;
1419 struct serial_struct ret_serial;
1420
1421 if (!ret_arg)
1422 return -EFAULT;
1423
1424 memset(&ret_serial, 0, sizeof(ret_serial));
1425
1426 ret_serial.type = PORT_16550A;
1427 ret_serial.line = port->serial->minor;
1428 ret_serial.port = port->number - port->serial->minor;
1429 ret_serial.flags = tport->tp_flags;
1430 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1431 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1432 ret_serial.closing_wait = tport->tp_closing_wait;
1433
1434 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1435 return -EFAULT;
1436
1437 return 0;
1438 }
1439
1440
1441 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1442 struct serial_struct __user *new_arg)
1443 {
1444 struct serial_struct new_serial;
1445
1446 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1447 return -EFAULT;
1448
1449 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1450 tport->tp_closing_wait = new_serial.closing_wait;
1451
1452 return 0;
1453 }
1454
1455
1456 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1457 {
1458 struct async_icount *icount;
1459 struct tty_struct *tty;
1460 unsigned long flags;
1461
1462 dbg("%s - msr 0x%02X", __func__, msr);
1463
1464 if (msr & TI_MSR_DELTA_MASK) {
1465 spin_lock_irqsave(&tport->tp_lock, flags);
1466 icount = &tport->tp_icount;
1467 if (msr & TI_MSR_DELTA_CTS)
1468 icount->cts++;
1469 if (msr & TI_MSR_DELTA_DSR)
1470 icount->dsr++;
1471 if (msr & TI_MSR_DELTA_CD)
1472 icount->dcd++;
1473 if (msr & TI_MSR_DELTA_RI)
1474 icount->rng++;
1475 wake_up_interruptible(&tport->tp_msr_wait);
1476 spin_unlock_irqrestore(&tport->tp_lock, flags);
1477 }
1478
1479 tport->tp_msr = msr & TI_MSR_MASK;
1480
1481 /* handle CTS flow control */
1482 tty = tty_port_tty_get(&tport->tp_port->port);
1483 if (tty && C_CRTSCTS(tty)) {
1484 if (msr & TI_MSR_CTS) {
1485 tty->hw_stopped = 0;
1486 tty_wakeup(tty);
1487 } else {
1488 tty->hw_stopped = 1;
1489 }
1490 }
1491 tty_kref_put(tty);
1492 }
1493
1494
1495 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1496 {
1497 struct ti_device *tdev = tport->tp_tdev;
1498 struct usb_serial_port *port = tport->tp_port;
1499 wait_queue_t wait;
1500
1501 dbg("%s - port %d", __func__, port->number);
1502
1503 spin_lock_irq(&tport->tp_lock);
1504
1505 /* wait for data to drain from the buffer */
1506 tdev->td_urb_error = 0;
1507 init_waitqueue_entry(&wait, current);
1508 add_wait_queue(&tport->tp_write_wait, &wait);
1509 for (;;) {
1510 set_current_state(TASK_INTERRUPTIBLE);
1511 if (kfifo_len(&tport->write_fifo) == 0
1512 || timeout == 0 || signal_pending(current)
1513 || tdev->td_urb_error
1514 || port->serial->disconnected) /* disconnect */
1515 break;
1516 spin_unlock_irq(&tport->tp_lock);
1517 timeout = schedule_timeout(timeout);
1518 spin_lock_irq(&tport->tp_lock);
1519 }
1520 set_current_state(TASK_RUNNING);
1521 remove_wait_queue(&tport->tp_write_wait, &wait);
1522
1523 /* flush any remaining data in the buffer */
1524 if (flush)
1525 kfifo_reset_out(&tport->write_fifo);
1526
1527 spin_unlock_irq(&tport->tp_lock);
1528
1529 mutex_lock(&port->serial->disc_mutex);
1530 /* wait for data to drain from the device */
1531 /* wait for empty tx register, plus 20 ms */
1532 timeout += jiffies;
1533 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1534 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1535 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1536 && !port->serial->disconnected) {
1537 if (ti_get_lsr(tport))
1538 break;
1539 mutex_unlock(&port->serial->disc_mutex);
1540 msleep_interruptible(20);
1541 mutex_lock(&port->serial->disc_mutex);
1542 }
1543 mutex_unlock(&port->serial->disc_mutex);
1544 }
1545
1546
1547 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1548 {
1549 unsigned long flags;
1550
1551 spin_lock_irqsave(&tport->tp_lock, flags);
1552
1553 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1554 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1555
1556 spin_unlock_irqrestore(&tport->tp_lock, flags);
1557 }
1558
1559
1560 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1561 {
1562 struct urb *urb;
1563 int status = 0;
1564 unsigned long flags;
1565
1566 spin_lock_irqsave(&tport->tp_lock, flags);
1567
1568 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1569 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1570 urb = tport->tp_port->read_urb;
1571 spin_unlock_irqrestore(&tport->tp_lock, flags);
1572 urb->context = tport;
1573 status = usb_submit_urb(urb, GFP_KERNEL);
1574 } else {
1575 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1576 spin_unlock_irqrestore(&tport->tp_lock, flags);
1577 }
1578
1579 return status;
1580 }
1581
1582
1583 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1584 __u16 moduleid, __u16 value, __u8 *data, int size)
1585 {
1586 int status;
1587
1588 status = usb_control_msg(tdev->td_serial->dev,
1589 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1590 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1591 value, moduleid, data, size, 1000);
1592
1593 if (status == size)
1594 status = 0;
1595
1596 if (status > 0)
1597 status = -ECOMM;
1598
1599 return status;
1600 }
1601
1602
1603 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1604 __u16 moduleid, __u16 value, __u8 *data, int size)
1605 {
1606 int status;
1607
1608 status = usb_control_msg(tdev->td_serial->dev,
1609 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1610 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1611 value, moduleid, data, size, 1000);
1612
1613 if (status == size)
1614 status = 0;
1615
1616 if (status > 0)
1617 status = -ECOMM;
1618
1619 return status;
1620 }
1621
1622
1623 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1624 __u8 mask, __u8 byte)
1625 {
1626 int status;
1627 unsigned int size;
1628 struct ti_write_data_bytes *data;
1629 struct device *dev = &tdev->td_serial->dev->dev;
1630
1631 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1632 __func__, addr, mask, byte);
1633
1634 size = sizeof(struct ti_write_data_bytes) + 2;
1635 data = kmalloc(size, GFP_KERNEL);
1636 if (!data) {
1637 dev_err(dev, "%s - out of memory\n", __func__);
1638 return -ENOMEM;
1639 }
1640
1641 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1642 data->bDataType = TI_RW_DATA_BYTE;
1643 data->bDataCounter = 1;
1644 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1645 data->wBaseAddrLo = cpu_to_be16(addr);
1646 data->bData[0] = mask;
1647 data->bData[1] = byte;
1648
1649 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1650 (__u8 *)data, size);
1651
1652 if (status < 0)
1653 dev_err(dev, "%s - failed, %d\n", __func__, status);
1654
1655 kfree(data);
1656
1657 return status;
1658 }
1659
1660 static int ti_do_download(struct usb_device *dev, int pipe,
1661 u8 *buffer, int size)
1662 {
1663 int pos;
1664 u8 cs = 0;
1665 int done;
1666 struct ti_firmware_header *header;
1667 int status = 0;
1668 int len;
1669
1670 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1671 cs = (__u8)(cs + buffer[pos]);
1672
1673 header = (struct ti_firmware_header *)buffer;
1674 header->wLength = cpu_to_le16((__u16)(size
1675 - sizeof(struct ti_firmware_header)));
1676 header->bCheckSum = cs;
1677
1678 dbg("%s - downloading firmware", __func__);
1679 for (pos = 0; pos < size; pos += done) {
1680 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1681 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1682 &done, 1000);
1683 if (status)
1684 break;
1685 }
1686 return status;
1687 }
1688
1689 static int ti_download_firmware(struct ti_device *tdev)
1690 {
1691 int status;
1692 int buffer_size;
1693 __u8 *buffer;
1694 struct usb_device *dev = tdev->td_serial->dev;
1695 unsigned int pipe = usb_sndbulkpipe(dev,
1696 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1697 const struct firmware *fw_p;
1698 char buf[32];
1699
1700 dbg("%s\n", __func__);
1701 /* try ID specific firmware first, then try generic firmware */
1702 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1703 dev->descriptor.idProduct);
1704 if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1705 buf[0] = '\0';
1706 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1707 switch (dev->descriptor.idProduct) {
1708 case MTS_CDMA_PRODUCT_ID:
1709 strcpy(buf, "mts_cdma.fw");
1710 break;
1711 case MTS_GSM_PRODUCT_ID:
1712 strcpy(buf, "mts_gsm.fw");
1713 break;
1714 case MTS_EDGE_PRODUCT_ID:
1715 strcpy(buf, "mts_edge.fw");
1716 break;
1717 case MTS_MT9234MU_PRODUCT_ID:
1718 strcpy(buf, "mts_mt9234mu.fw");
1719 break;
1720 case MTS_MT9234ZBA_PRODUCT_ID:
1721 strcpy(buf, "mts_mt9234zba.fw");
1722 break;
1723 case MTS_MT9234ZBAOLD_PRODUCT_ID:
1724 strcpy(buf, "mts_mt9234zba.fw");
1725 break; }
1726 }
1727 if (buf[0] == '\0') {
1728 if (tdev->td_is_3410)
1729 strcpy(buf, "ti_3410.fw");
1730 else
1731 strcpy(buf, "ti_5052.fw");
1732 }
1733 status = request_firmware(&fw_p, buf, &dev->dev);
1734 }
1735 if (status) {
1736 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1737 return -ENOENT;
1738 }
1739 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1740 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1741 release_firmware(fw_p);
1742 return -ENOENT;
1743 }
1744
1745 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1746 buffer = kmalloc(buffer_size, GFP_KERNEL);
1747 if (buffer) {
1748 memcpy(buffer, fw_p->data, fw_p->size);
1749 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1750 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1751 kfree(buffer);
1752 } else {
1753 dbg("%s ENOMEM\n", __func__);
1754 status = -ENOMEM;
1755 }
1756 release_firmware(fw_p);
1757 if (status) {
1758 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1759 __func__, status);
1760 return status;
1761 }
1762
1763 dbg("%s - download successful", __func__);
1764
1765 return 0;
1766 }