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ti_usb_3410_5052: add Multi-Tech firmware
[firewire-audio.git] / drivers / usb / serial / ti_usb_3410_5052.c
blob3cf41df302d7820f5e1509246128bfca34393f95
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_LOW_LATENCY 0
54 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
55
56 /* supported setserial flags */
57 #define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY)
58
59 /* read urb states */
60 #define TI_READ_URB_RUNNING 0
61 #define TI_READ_URB_STOPPING 1
62 #define TI_READ_URB_STOPPED 2
63
64 #define TI_EXTRA_VID_PID_COUNT 5
65
66
67 /* Structures */
68
69 struct ti_port {
70 int tp_is_open;
71 __u8 tp_msr;
72 __u8 tp_lsr;
73 __u8 tp_shadow_mcr;
74 __u8 tp_uart_mode; /* 232 or 485 modes */
75 unsigned int tp_uart_base_addr;
76 int tp_flags;
77 int tp_closing_wait;/* in .01 secs */
78 struct async_icount tp_icount;
79 wait_queue_head_t tp_msr_wait; /* wait for msr change */
80 wait_queue_head_t tp_write_wait;
81 struct ti_device *tp_tdev;
82 struct usb_serial_port *tp_port;
83 spinlock_t tp_lock;
84 int tp_read_urb_state;
85 int tp_write_urb_in_use;
86 struct circ_buf *tp_write_buf;
87 };
88
89 struct ti_device {
90 struct mutex td_open_close_lock;
91 int td_open_port_count;
92 struct usb_serial *td_serial;
93 int td_is_3410;
94 int td_urb_error;
95 };
96
97
98 /* Function Declarations */
99
100 static int ti_startup(struct usb_serial *serial);
101 static void ti_shutdown(struct usb_serial *serial);
102 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port,
103 struct file *file);
104 static void ti_close(struct tty_struct *tty, struct usb_serial_port *port,
105 struct file *file);
106 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
107 const unsigned char *data, int count);
108 static int ti_write_room(struct tty_struct *tty);
109 static int ti_chars_in_buffer(struct tty_struct *tty);
110 static void ti_throttle(struct tty_struct *tty);
111 static void ti_unthrottle(struct tty_struct *tty);
112 static int ti_ioctl(struct tty_struct *tty, struct file *file,
113 unsigned int cmd, unsigned long arg);
114 static void ti_set_termios(struct tty_struct *tty,
115 struct usb_serial_port *port, struct ktermios *old_termios);
116 static int ti_tiocmget(struct tty_struct *tty, struct file *file);
117 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
118 unsigned int set, unsigned int clear);
119 static void ti_break(struct tty_struct *tty, int break_state);
120 static void ti_interrupt_callback(struct urb *urb);
121 static void ti_bulk_in_callback(struct urb *urb);
122 static void ti_bulk_out_callback(struct urb *urb);
123
124 static void ti_recv(struct device *dev, struct tty_struct *tty,
125 unsigned char *data, int length);
126 static void ti_send(struct ti_port *tport);
127 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
128 static int ti_get_lsr(struct ti_port *tport);
129 static int ti_get_serial_info(struct ti_port *tport,
130 struct serial_struct __user *ret_arg);
131 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
132 struct serial_struct __user *new_arg);
133 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
134
135 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
136
137 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
138 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
139
140 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
141 __u16 moduleid, __u16 value, __u8 *data, int size);
142 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
143 __u16 moduleid, __u16 value, __u8 *data, int size);
144
145 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
146 __u8 mask, __u8 byte);
147
148 static int ti_download_firmware(struct ti_device *tdev);
149
150 /* circular buffer */
151 static struct circ_buf *ti_buf_alloc(void);
152 static void ti_buf_free(struct circ_buf *cb);
153 static void ti_buf_clear(struct circ_buf *cb);
154 static int ti_buf_data_avail(struct circ_buf *cb);
155 static int ti_buf_space_avail(struct circ_buf *cb);
156 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
157 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
158
159
160 /* Data */
161
162 /* module parameters */
163 static int debug;
164 static int low_latency = TI_DEFAULT_LOW_LATENCY;
165 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
166 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
167 static unsigned int vendor_3410_count;
168 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
169 static unsigned int product_3410_count;
170 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
171 static unsigned int vendor_5052_count;
172 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
173 static unsigned int product_5052_count;
174
175 /* supported devices */
176 /* the array dimension is the number of default entries plus */
177 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
178 /* null entry */
179 static struct usb_device_id ti_id_table_3410[7+TI_EXTRA_VID_PID_COUNT+1] = {
180 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
181 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
182 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
183 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
184 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
185 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
186 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
187 };
188
189 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
190 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
191 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
192 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
193 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
194 };
195
196 static struct usb_device_id ti_id_table_combined[6+2*TI_EXTRA_VID_PID_COUNT+1] = {
197 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
198 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
199 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
200 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
201 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
202 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
203 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
204 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
205 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
206 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
207 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
208 { }
209 };
210
211 static struct usb_driver ti_usb_driver = {
212 .name = "ti_usb_3410_5052",
213 .probe = usb_serial_probe,
214 .disconnect = usb_serial_disconnect,
215 .id_table = ti_id_table_combined,
216 .no_dynamic_id = 1,
217 };
218
219 static struct usb_serial_driver ti_1port_device = {
220 .driver = {
221 .owner = THIS_MODULE,
222 .name = "ti_usb_3410_5052_1",
223 },
224 .description = "TI USB 3410 1 port adapter",
225 .usb_driver = &ti_usb_driver,
226 .id_table = ti_id_table_3410,
227 .num_ports = 1,
228 .attach = ti_startup,
229 .shutdown = ti_shutdown,
230 .open = ti_open,
231 .close = ti_close,
232 .write = ti_write,
233 .write_room = ti_write_room,
234 .chars_in_buffer = ti_chars_in_buffer,
235 .throttle = ti_throttle,
236 .unthrottle = ti_unthrottle,
237 .ioctl = ti_ioctl,
238 .set_termios = ti_set_termios,
239 .tiocmget = ti_tiocmget,
240 .tiocmset = ti_tiocmset,
241 .break_ctl = ti_break,
242 .read_int_callback = ti_interrupt_callback,
243 .read_bulk_callback = ti_bulk_in_callback,
244 .write_bulk_callback = ti_bulk_out_callback,
245 };
246
247 static struct usb_serial_driver ti_2port_device = {
248 .driver = {
249 .owner = THIS_MODULE,
250 .name = "ti_usb_3410_5052_2",
251 },
252 .description = "TI USB 5052 2 port adapter",
253 .usb_driver = &ti_usb_driver,
254 .id_table = ti_id_table_5052,
255 .num_ports = 2,
256 .attach = ti_startup,
257 .shutdown = ti_shutdown,
258 .open = ti_open,
259 .close = ti_close,
260 .write = ti_write,
261 .write_room = ti_write_room,
262 .chars_in_buffer = ti_chars_in_buffer,
263 .throttle = ti_throttle,
264 .unthrottle = ti_unthrottle,
265 .ioctl = ti_ioctl,
266 .set_termios = ti_set_termios,
267 .tiocmget = ti_tiocmget,
268 .tiocmset = ti_tiocmset,
269 .break_ctl = ti_break,
270 .read_int_callback = ti_interrupt_callback,
271 .read_bulk_callback = ti_bulk_in_callback,
272 .write_bulk_callback = ti_bulk_out_callback,
273 };
274
275
276 /* Module */
277
278 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
279 MODULE_DESCRIPTION(TI_DRIVER_DESC);
280 MODULE_VERSION(TI_DRIVER_VERSION);
281 MODULE_LICENSE("GPL");
282
283 MODULE_FIRMWARE("ti_3410.fw");
284 MODULE_FIRMWARE("ti_5052.fw");
285 MODULE_FIRMWARE("mts_cdma.fw");
286 MODULE_FIRMWARE("mts_gsm.fw");
287 MODULE_FIRMWARE("mts_edge.fw");
288
289 module_param(debug, bool, S_IRUGO | S_IWUSR);
290 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
291
292 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
293 MODULE_PARM_DESC(low_latency,
294 "TTY low_latency flag, 0=off, 1=on, default is off");
295
296 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
297 MODULE_PARM_DESC(closing_wait,
298 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
299
300 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
301 MODULE_PARM_DESC(vendor_3410,
302 "Vendor ids for 3410 based devices, 1-5 short integers");
303 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
304 MODULE_PARM_DESC(product_3410,
305 "Product ids for 3410 based devices, 1-5 short integers");
306 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
307 MODULE_PARM_DESC(vendor_5052,
308 "Vendor ids for 5052 based devices, 1-5 short integers");
309 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
310 MODULE_PARM_DESC(product_5052,
311 "Product ids for 5052 based devices, 1-5 short integers");
312
313 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
314
315
316 /* Functions */
317
318 static int __init ti_init(void)
319 {
320 int i, j, c;
321 int ret;
322
323 /* insert extra vendor and product ids */
324 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
325 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
326 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
327 ti_id_table_3410[j].idVendor = vendor_3410[i];
328 ti_id_table_3410[j].idProduct = product_3410[i];
329 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
330 ti_id_table_combined[c].idVendor = vendor_3410[i];
331 ti_id_table_combined[c].idProduct = product_3410[i];
332 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
333 }
334 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
335 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
336 ti_id_table_5052[j].idVendor = vendor_5052[i];
337 ti_id_table_5052[j].idProduct = product_5052[i];
338 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
339 ti_id_table_combined[c].idVendor = vendor_5052[i];
340 ti_id_table_combined[c].idProduct = product_5052[i];
341 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
342 }
343
344 ret = usb_serial_register(&ti_1port_device);
345 if (ret)
346 goto failed_1port;
347 ret = usb_serial_register(&ti_2port_device);
348 if (ret)
349 goto failed_2port;
350
351 ret = usb_register(&ti_usb_driver);
352 if (ret)
353 goto failed_usb;
354
355 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
356 TI_DRIVER_DESC "\n");
357
358 return 0;
359
360 failed_usb:
361 usb_serial_deregister(&ti_2port_device);
362 failed_2port:
363 usb_serial_deregister(&ti_1port_device);
364 failed_1port:
365 return ret;
366 }
367
368
369 static void __exit ti_exit(void)
370 {
371 usb_serial_deregister(&ti_1port_device);
372 usb_serial_deregister(&ti_2port_device);
373 usb_deregister(&ti_usb_driver);
374 }
375
376
377 module_init(ti_init);
378 module_exit(ti_exit);
379
380
381 static int ti_startup(struct usb_serial *serial)
382 {
383 struct ti_device *tdev;
384 struct ti_port *tport;
385 struct usb_device *dev = serial->dev;
386 int status;
387 int i;
388
389
390 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
391 __func__, le16_to_cpu(dev->descriptor.idProduct),
392 dev->descriptor.bNumConfigurations,
393 dev->actconfig->desc.bConfigurationValue);
394
395 /* create device structure */
396 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
397 if (tdev == NULL) {
398 dev_err(&dev->dev, "%s - out of memory\n", __func__);
399 return -ENOMEM;
400 }
401 mutex_init(&tdev->td_open_close_lock);
402 tdev->td_serial = serial;
403 usb_set_serial_data(serial, tdev);
404
405 /* determine device type */
406 if (usb_match_id(serial->interface, ti_id_table_3410))
407 tdev->td_is_3410 = 1;
408 dbg("%s - device type is %s", __func__,
409 tdev->td_is_3410 ? "3410" : "5052");
410
411 /* if we have only 1 configuration, download firmware */
412 if (dev->descriptor.bNumConfigurations == 1) {
413 if ((status = ti_download_firmware(tdev)) != 0)
414 goto free_tdev;
415
416 /* 3410 must be reset, 5052 resets itself */
417 if (tdev->td_is_3410) {
418 msleep_interruptible(100);
419 usb_reset_device(dev);
420 }
421
422 status = -ENODEV;
423 goto free_tdev;
424 }
425
426 /* the second configuration must be set */
427 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
428 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
429 status = status ? status : -ENODEV;
430 goto free_tdev;
431 }
432
433 /* set up port structures */
434 for (i = 0; i < serial->num_ports; ++i) {
435 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
436 if (tport == NULL) {
437 dev_err(&dev->dev, "%s - out of memory\n", __func__);
438 status = -ENOMEM;
439 goto free_tports;
440 }
441 spin_lock_init(&tport->tp_lock);
442 tport->tp_uart_base_addr = (i == 0 ?
443 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
444 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
445 tport->tp_closing_wait = closing_wait;
446 init_waitqueue_head(&tport->tp_msr_wait);
447 init_waitqueue_head(&tport->tp_write_wait);
448 tport->tp_write_buf = ti_buf_alloc();
449 if (tport->tp_write_buf == NULL) {
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 ti_buf_free(tport->tp_write_buf);
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_shutdown(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 ti_buf_free(tport->tp_write_buf);
489 kfree(tport);
490 usb_set_serial_port_data(serial->port[i], NULL);
491 }
492 }
493
494 kfree(tdev);
495 usb_set_serial_data(serial, NULL);
496 }
497
498
499 static int ti_open(struct tty_struct *tty,
500 struct usb_serial_port *port, struct file *file)
501 {
502 struct ti_port *tport = usb_get_serial_port_data(port);
503 struct ti_device *tdev;
504 struct usb_device *dev;
505 struct urb *urb;
506 int port_number;
507 int status;
508 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
509 TI_PIPE_TIMEOUT_ENABLE |
510 (TI_TRANSFER_TIMEOUT << 2));
511
512 dbg("%s - port %d", __func__, port->number);
513
514 if (tport == NULL)
515 return -ENODEV;
516
517 dev = port->serial->dev;
518 tdev = tport->tp_tdev;
519
520 /* only one open on any port on a device at a time */
521 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
522 return -ERESTARTSYS;
523
524 if (tty)
525 tty->low_latency =
526 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
527
528 port_number = port->number - port->serial->minor;
529
530 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
531
532 tport->tp_msr = 0;
533 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
534
535 /* start interrupt urb the first time a port is opened on this device */
536 if (tdev->td_open_port_count == 0) {
537 dbg("%s - start interrupt in urb", __func__);
538 urb = tdev->td_serial->port[0]->interrupt_in_urb;
539 if (!urb) {
540 dev_err(&port->dev, "%s - no interrupt urb\n",
541 __func__);
542 status = -EINVAL;
543 goto release_lock;
544 }
545 urb->complete = ti_interrupt_callback;
546 urb->context = tdev;
547 urb->dev = dev;
548 status = usb_submit_urb(urb, GFP_KERNEL);
549 if (status) {
550 dev_err(&port->dev,
551 "%s - submit interrupt urb failed, %d\n",
552 __func__, status);
553 goto release_lock;
554 }
555 }
556
557 if (tty)
558 ti_set_termios(tty, port, tty->termios);
559
560 dbg("%s - sending TI_OPEN_PORT", __func__);
561 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
562 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
563 if (status) {
564 dev_err(&port->dev, "%s - cannot send open command, %d\n",
565 __func__, status);
566 goto unlink_int_urb;
567 }
568
569 dbg("%s - sending TI_START_PORT", __func__);
570 status = ti_command_out_sync(tdev, TI_START_PORT,
571 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
572 if (status) {
573 dev_err(&port->dev, "%s - cannot send start command, %d\n",
574 __func__, status);
575 goto unlink_int_urb;
576 }
577
578 dbg("%s - sending TI_PURGE_PORT", __func__);
579 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
580 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
581 if (status) {
582 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
583 __func__, status);
584 goto unlink_int_urb;
585 }
586 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
587 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
588 if (status) {
589 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
590 __func__, status);
591 goto unlink_int_urb;
592 }
593
594 /* reset the data toggle on the bulk endpoints to work around bug in
595 * host controllers where things get out of sync some times */
596 usb_clear_halt(dev, port->write_urb->pipe);
597 usb_clear_halt(dev, port->read_urb->pipe);
598
599 if (tty)
600 ti_set_termios(tty, port, tty->termios);
601
602 dbg("%s - sending TI_OPEN_PORT (2)", __func__);
603 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
604 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
605 if (status) {
606 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
607 __func__, status);
608 goto unlink_int_urb;
609 }
610
611 dbg("%s - sending TI_START_PORT (2)", __func__);
612 status = ti_command_out_sync(tdev, TI_START_PORT,
613 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
614 if (status) {
615 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
616 __func__, status);
617 goto unlink_int_urb;
618 }
619
620 /* start read urb */
621 dbg("%s - start read urb", __func__);
622 urb = port->read_urb;
623 if (!urb) {
624 dev_err(&port->dev, "%s - no read urb\n", __func__);
625 status = -EINVAL;
626 goto unlink_int_urb;
627 }
628 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
629 urb->complete = ti_bulk_in_callback;
630 urb->context = tport;
631 urb->dev = dev;
632 status = usb_submit_urb(urb, GFP_KERNEL);
633 if (status) {
634 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
635 __func__, status);
636 goto unlink_int_urb;
637 }
638
639 tport->tp_is_open = 1;
640 ++tdev->td_open_port_count;
641
642 goto release_lock;
643
644 unlink_int_urb:
645 if (tdev->td_open_port_count == 0)
646 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
647 release_lock:
648 mutex_unlock(&tdev->td_open_close_lock);
649 dbg("%s - exit %d", __func__, status);
650 return status;
651 }
652
653
654 static void ti_close(struct tty_struct *tty, struct usb_serial_port *port,
655 struct file *file)
656 {
657 struct ti_device *tdev;
658 struct ti_port *tport;
659 int port_number;
660 int status;
661 int do_unlock;
662
663 dbg("%s - port %d", __func__, port->number);
664
665 tdev = usb_get_serial_data(port->serial);
666 tport = usb_get_serial_port_data(port);
667 if (tdev == NULL || tport == NULL)
668 return;
669
670 tport->tp_is_open = 0;
671
672 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
673
674 usb_kill_urb(port->read_urb);
675 usb_kill_urb(port->write_urb);
676 tport->tp_write_urb_in_use = 0;
677
678 port_number = port->number - port->serial->minor;
679
680 dbg("%s - sending TI_CLOSE_PORT", __func__);
681 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
682 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
683 if (status)
684 dev_err(&port->dev,
685 "%s - cannot send close port command, %d\n"
686 , __func__, status);
687
688 /* if mutex_lock is interrupted, continue anyway */
689 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
690 --tport->tp_tdev->td_open_port_count;
691 if (tport->tp_tdev->td_open_port_count <= 0) {
692 /* last port is closed, shut down interrupt urb */
693 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
694 tport->tp_tdev->td_open_port_count = 0;
695 }
696 if (do_unlock)
697 mutex_unlock(&tdev->td_open_close_lock);
698
699 dbg("%s - exit", __func__);
700 }
701
702
703 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
704 const unsigned char *data, int count)
705 {
706 struct ti_port *tport = usb_get_serial_port_data(port);
707 unsigned long flags;
708
709 dbg("%s - port %d", __func__, port->number);
710
711 if (count == 0) {
712 dbg("%s - write request of 0 bytes", __func__);
713 return 0;
714 }
715
716 if (tport == NULL || !tport->tp_is_open)
717 return -ENODEV;
718
719 spin_lock_irqsave(&tport->tp_lock, flags);
720 count = ti_buf_put(tport->tp_write_buf, data, count);
721 spin_unlock_irqrestore(&tport->tp_lock, flags);
722
723 ti_send(tport);
724
725 return count;
726 }
727
728
729 static int ti_write_room(struct tty_struct *tty)
730 {
731 struct usb_serial_port *port = tty->driver_data;
732 struct ti_port *tport = usb_get_serial_port_data(port);
733 int room = 0;
734 unsigned long flags;
735
736 dbg("%s - port %d", __func__, port->number);
737
738 if (tport == NULL)
739 return -ENODEV;
740
741 spin_lock_irqsave(&tport->tp_lock, flags);
742 room = ti_buf_space_avail(tport->tp_write_buf);
743 spin_unlock_irqrestore(&tport->tp_lock, flags);
744
745 dbg("%s - returns %d", __func__, room);
746 return room;
747 }
748
749
750 static int ti_chars_in_buffer(struct tty_struct *tty)
751 {
752 struct usb_serial_port *port = tty->driver_data;
753 struct ti_port *tport = usb_get_serial_port_data(port);
754 int chars = 0;
755 unsigned long flags;
756
757 dbg("%s - port %d", __func__, port->number);
758
759 if (tport == NULL)
760 return -ENODEV;
761
762 spin_lock_irqsave(&tport->tp_lock, flags);
763 chars = ti_buf_data_avail(tport->tp_write_buf);
764 spin_unlock_irqrestore(&tport->tp_lock, flags);
765
766 dbg("%s - returns %d", __func__, chars);
767 return chars;
768 }
769
770
771 static void ti_throttle(struct tty_struct *tty)
772 {
773 struct usb_serial_port *port = tty->driver_data;
774 struct ti_port *tport = usb_get_serial_port_data(port);
775
776 dbg("%s - port %d", __func__, port->number);
777
778 if (tport == NULL)
779 return;
780
781 if (I_IXOFF(tty) || C_CRTSCTS(tty))
782 ti_stop_read(tport, tty);
783
784 }
785
786
787 static void ti_unthrottle(struct tty_struct *tty)
788 {
789 struct usb_serial_port *port = tty->driver_data;
790 struct ti_port *tport = usb_get_serial_port_data(port);
791 int status;
792
793 dbg("%s - port %d", __func__, port->number);
794
795 if (tport == NULL)
796 return;
797
798 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
799 status = ti_restart_read(tport, tty);
800 if (status)
801 dev_err(&port->dev, "%s - cannot restart read, %d\n",
802 __func__, status);
803 }
804 }
805
806
807 static int ti_ioctl(struct tty_struct *tty, struct file *file,
808 unsigned int cmd, unsigned long arg)
809 {
810 struct usb_serial_port *port = tty->driver_data;
811 struct ti_port *tport = usb_get_serial_port_data(port);
812 struct async_icount cnow;
813 struct async_icount cprev;
814
815 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
816
817 if (tport == NULL)
818 return -ENODEV;
819
820 switch (cmd) {
821 case TIOCGSERIAL:
822 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
823 return ti_get_serial_info(tport,
824 (struct serial_struct __user *)arg);
825 case TIOCSSERIAL:
826 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
827 return ti_set_serial_info(tty, tport,
828 (struct serial_struct __user *)arg);
829 case TIOCMIWAIT:
830 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
831 cprev = tport->tp_icount;
832 while (1) {
833 interruptible_sleep_on(&tport->tp_msr_wait);
834 if (signal_pending(current))
835 return -ERESTARTSYS;
836 cnow = tport->tp_icount;
837 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
838 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
839 return -EIO; /* no change => error */
840 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
841 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
842 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
843 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
844 return 0;
845 cprev = cnow;
846 }
847 break;
848 case TIOCGICOUNT:
849 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
850 __func__, port->number,
851 tport->tp_icount.rx, tport->tp_icount.tx);
852 if (copy_to_user((void __user *)arg, &tport->tp_icount,
853 sizeof(tport->tp_icount)))
854 return -EFAULT;
855 return 0;
856 }
857 return -ENOIOCTLCMD;
858 }
859
860
861 static void ti_set_termios(struct tty_struct *tty,
862 struct usb_serial_port *port, struct ktermios *old_termios)
863 {
864 struct ti_port *tport = usb_get_serial_port_data(port);
865 struct ti_uart_config *config;
866 tcflag_t cflag, iflag;
867 int baud;
868 int status;
869 int port_number = port->number - port->serial->minor;
870 unsigned int mcr;
871
872 dbg("%s - port %d", __func__, port->number);
873
874 cflag = tty->termios->c_cflag;
875 iflag = tty->termios->c_iflag;
876
877 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
878 dbg("%s - old clfag %08x, old iflag %08x", __func__,
879 old_termios->c_cflag, old_termios->c_iflag);
880
881 if (tport == NULL)
882 return;
883
884 config = kmalloc(sizeof(*config), GFP_KERNEL);
885 if (!config) {
886 dev_err(&port->dev, "%s - out of memory\n", __func__);
887 return;
888 }
889
890 config->wFlags = 0;
891
892 /* these flags must be set */
893 config->wFlags |= TI_UART_ENABLE_MS_INTS;
894 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
895 config->bUartMode = (__u8)(tport->tp_uart_mode);
896
897 switch (cflag & CSIZE) {
898 case CS5:
899 config->bDataBits = TI_UART_5_DATA_BITS;
900 break;
901 case CS6:
902 config->bDataBits = TI_UART_6_DATA_BITS;
903 break;
904 case CS7:
905 config->bDataBits = TI_UART_7_DATA_BITS;
906 break;
907 default:
908 case CS8:
909 config->bDataBits = TI_UART_8_DATA_BITS;
910 break;
911 }
912
913 /* CMSPAR isn't supported by this driver */
914 tty->termios->c_cflag &= ~CMSPAR;
915
916 if (cflag & PARENB) {
917 if (cflag & PARODD) {
918 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
919 config->bParity = TI_UART_ODD_PARITY;
920 } else {
921 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
922 config->bParity = TI_UART_EVEN_PARITY;
923 }
924 } else {
925 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
926 config->bParity = TI_UART_NO_PARITY;
927 }
928
929 if (cflag & CSTOPB)
930 config->bStopBits = TI_UART_2_STOP_BITS;
931 else
932 config->bStopBits = TI_UART_1_STOP_BITS;
933
934 if (cflag & CRTSCTS) {
935 /* RTS flow control must be off to drop RTS for baud rate B0 */
936 if ((cflag & CBAUD) != B0)
937 config->wFlags |= TI_UART_ENABLE_RTS_IN;
938 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
939 } else {
940 tty->hw_stopped = 0;
941 ti_restart_read(tport, tty);
942 }
943
944 if (I_IXOFF(tty) || I_IXON(tty)) {
945 config->cXon = START_CHAR(tty);
946 config->cXoff = STOP_CHAR(tty);
947
948 if (I_IXOFF(tty))
949 config->wFlags |= TI_UART_ENABLE_X_IN;
950 else
951 ti_restart_read(tport, tty);
952
953 if (I_IXON(tty))
954 config->wFlags |= TI_UART_ENABLE_X_OUT;
955 }
956
957 baud = tty_get_baud_rate(tty);
958 if (!baud)
959 baud = 9600;
960 if (tport->tp_tdev->td_is_3410)
961 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
962 else
963 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
964
965 /* FIXME: Should calculate resulting baud here and report it back */
966 if ((cflag & CBAUD) != B0)
967 tty_encode_baud_rate(tty, baud, baud);
968
969 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
970 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
971
972 cpu_to_be16s(&config->wBaudRate);
973 cpu_to_be16s(&config->wFlags);
974
975 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
976 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
977 sizeof(*config));
978 if (status)
979 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
980 __func__, port_number, status);
981
982 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
983 mcr = tport->tp_shadow_mcr;
984 /* if baud rate is B0, clear RTS and DTR */
985 if ((cflag & CBAUD) == B0)
986 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
987 status = ti_set_mcr(tport, mcr);
988 if (status)
989 dev_err(&port->dev,
990 "%s - cannot set modem control on port %d, %d\n",
991 __func__, port_number, status);
992
993 kfree(config);
994 }
995
996
997 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
998 {
999 struct usb_serial_port *port = tty->driver_data;
1000 struct ti_port *tport = usb_get_serial_port_data(port);
1001 unsigned int result;
1002 unsigned int msr;
1003 unsigned int mcr;
1004 unsigned long flags;
1005
1006 dbg("%s - port %d", __func__, port->number);
1007
1008 if (tport == NULL)
1009 return -ENODEV;
1010
1011 spin_lock_irqsave(&tport->tp_lock, flags);
1012 msr = tport->tp_msr;
1013 mcr = tport->tp_shadow_mcr;
1014 spin_unlock_irqrestore(&tport->tp_lock, flags);
1015
1016 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1017 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1018 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1019 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1020 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1021 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1022 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1023
1024 dbg("%s - 0x%04X", __func__, result);
1025
1026 return result;
1027 }
1028
1029
1030 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1031 unsigned int set, unsigned int clear)
1032 {
1033 struct usb_serial_port *port = tty->driver_data;
1034 struct ti_port *tport = usb_get_serial_port_data(port);
1035 unsigned int mcr;
1036 unsigned long flags;
1037
1038 dbg("%s - port %d", __func__, port->number);
1039
1040 if (tport == NULL)
1041 return -ENODEV;
1042
1043 spin_lock_irqsave(&tport->tp_lock, flags);
1044 mcr = tport->tp_shadow_mcr;
1045
1046 if (set & TIOCM_RTS)
1047 mcr |= TI_MCR_RTS;
1048 if (set & TIOCM_DTR)
1049 mcr |= TI_MCR_DTR;
1050 if (set & TIOCM_LOOP)
1051 mcr |= TI_MCR_LOOP;
1052
1053 if (clear & TIOCM_RTS)
1054 mcr &= ~TI_MCR_RTS;
1055 if (clear & TIOCM_DTR)
1056 mcr &= ~TI_MCR_DTR;
1057 if (clear & TIOCM_LOOP)
1058 mcr &= ~TI_MCR_LOOP;
1059 spin_unlock_irqrestore(&tport->tp_lock, flags);
1060
1061 return ti_set_mcr(tport, mcr);
1062 }
1063
1064
1065 static void ti_break(struct tty_struct *tty, int break_state)
1066 {
1067 struct usb_serial_port *port = tty->driver_data;
1068 struct ti_port *tport = usb_get_serial_port_data(port);
1069 int status;
1070
1071 dbg("%s - state = %d", __func__, break_state);
1072
1073 if (tport == NULL)
1074 return;
1075
1076 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1077
1078 status = ti_write_byte(tport->tp_tdev,
1079 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1080 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1081
1082 if (status)
1083 dbg("%s - error setting break, %d", __func__, status);
1084 }
1085
1086
1087 static void ti_interrupt_callback(struct urb *urb)
1088 {
1089 struct ti_device *tdev = urb->context;
1090 struct usb_serial_port *port;
1091 struct usb_serial *serial = tdev->td_serial;
1092 struct ti_port *tport;
1093 struct device *dev = &urb->dev->dev;
1094 unsigned char *data = urb->transfer_buffer;
1095 int length = urb->actual_length;
1096 int port_number;
1097 int function;
1098 int status = urb->status;
1099 int retval;
1100 __u8 msr;
1101
1102 dbg("%s", __func__);
1103
1104 switch (status) {
1105 case 0:
1106 break;
1107 case -ECONNRESET:
1108 case -ENOENT:
1109 case -ESHUTDOWN:
1110 dbg("%s - urb shutting down, %d", __func__, status);
1111 tdev->td_urb_error = 1;
1112 return;
1113 default:
1114 dev_err(dev, "%s - nonzero urb status, %d\n",
1115 __func__, status);
1116 tdev->td_urb_error = 1;
1117 goto exit;
1118 }
1119
1120 if (length != 2) {
1121 dbg("%s - bad packet size, %d", __func__, length);
1122 goto exit;
1123 }
1124
1125 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1126 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1127 goto exit;
1128 }
1129
1130 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1131 function = TI_GET_FUNC_FROM_CODE(data[0]);
1132
1133 dbg("%s - port_number %d, function %d, data 0x%02X",
1134 __func__, port_number, function, data[1]);
1135
1136 if (port_number >= serial->num_ports) {
1137 dev_err(dev, "%s - bad port number, %d\n",
1138 __func__, port_number);
1139 goto exit;
1140 }
1141
1142 port = serial->port[port_number];
1143
1144 tport = usb_get_serial_port_data(port);
1145 if (!tport)
1146 goto exit;
1147
1148 switch (function) {
1149 case TI_CODE_DATA_ERROR:
1150 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1151 __func__, port_number, data[1]);
1152 break;
1153
1154 case TI_CODE_MODEM_STATUS:
1155 msr = data[1];
1156 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1157 ti_handle_new_msr(tport, msr);
1158 break;
1159
1160 default:
1161 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1162 __func__, data[1]);
1163 break;
1164 }
1165
1166 exit:
1167 retval = usb_submit_urb(urb, GFP_ATOMIC);
1168 if (retval)
1169 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1170 __func__, retval);
1171 }
1172
1173
1174 static void ti_bulk_in_callback(struct urb *urb)
1175 {
1176 struct ti_port *tport = urb->context;
1177 struct usb_serial_port *port = tport->tp_port;
1178 struct device *dev = &urb->dev->dev;
1179 int status = urb->status;
1180 int retval = 0;
1181 struct tty_struct *tty;
1182
1183 dbg("%s", __func__);
1184
1185 switch (status) {
1186 case 0:
1187 break;
1188 case -ECONNRESET:
1189 case -ENOENT:
1190 case -ESHUTDOWN:
1191 dbg("%s - urb shutting down, %d", __func__, status);
1192 tport->tp_tdev->td_urb_error = 1;
1193 wake_up_interruptible(&tport->tp_write_wait);
1194 return;
1195 default:
1196 dev_err(dev, "%s - nonzero urb status, %d\n",
1197 __func__, status);
1198 tport->tp_tdev->td_urb_error = 1;
1199 wake_up_interruptible(&tport->tp_write_wait);
1200 }
1201
1202 if (status == -EPIPE)
1203 goto exit;
1204
1205 if (status) {
1206 dev_err(dev, "%s - stopping read!\n", __func__);
1207 return;
1208 }
1209
1210 tty = tty_port_tty_get(&port->port);
1211 if (tty && urb->actual_length) {
1212 usb_serial_debug_data(debug, dev, __func__,
1213 urb->actual_length, urb->transfer_buffer);
1214
1215 if (!tport->tp_is_open)
1216 dbg("%s - port closed, dropping data", __func__);
1217 else
1218 ti_recv(&urb->dev->dev, tty,
1219 urb->transfer_buffer,
1220 urb->actual_length);
1221
1222 spin_lock(&tport->tp_lock);
1223 tport->tp_icount.rx += urb->actual_length;
1224 spin_unlock(&tport->tp_lock);
1225 tty_kref_put(tty);
1226 }
1227
1228 exit:
1229 /* continue to read unless stopping */
1230 spin_lock(&tport->tp_lock);
1231 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1232 urb->dev = port->serial->dev;
1233 retval = usb_submit_urb(urb, GFP_ATOMIC);
1234 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1235 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1236 }
1237 spin_unlock(&tport->tp_lock);
1238 if (retval)
1239 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1240 __func__, retval);
1241 }
1242
1243
1244 static void ti_bulk_out_callback(struct urb *urb)
1245 {
1246 struct ti_port *tport = urb->context;
1247 struct usb_serial_port *port = tport->tp_port;
1248 struct device *dev = &urb->dev->dev;
1249 int status = urb->status;
1250
1251 dbg("%s - port %d", __func__, port->number);
1252
1253 tport->tp_write_urb_in_use = 0;
1254
1255 switch (status) {
1256 case 0:
1257 break;
1258 case -ECONNRESET:
1259 case -ENOENT:
1260 case -ESHUTDOWN:
1261 dbg("%s - urb shutting down, %d", __func__, status);
1262 tport->tp_tdev->td_urb_error = 1;
1263 wake_up_interruptible(&tport->tp_write_wait);
1264 return;
1265 default:
1266 dev_err(dev, "%s - nonzero urb status, %d\n",
1267 __func__, status);
1268 tport->tp_tdev->td_urb_error = 1;
1269 wake_up_interruptible(&tport->tp_write_wait);
1270 }
1271
1272 /* send any buffered data */
1273 ti_send(tport);
1274 }
1275
1276
1277 static void ti_recv(struct device *dev, struct tty_struct *tty,
1278 unsigned char *data, int length)
1279 {
1280 int cnt;
1281
1282 do {
1283 cnt = tty_buffer_request_room(tty, length);
1284 if (cnt < length) {
1285 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1286 __func__, length - cnt);
1287 if (cnt == 0)
1288 break;
1289 }
1290 tty_insert_flip_string(tty, data, cnt);
1291 tty_flip_buffer_push(tty);
1292 data += cnt;
1293 length -= cnt;
1294 } while (length > 0);
1295
1296 }
1297
1298
1299 static void ti_send(struct ti_port *tport)
1300 {
1301 int count, result;
1302 struct usb_serial_port *port = tport->tp_port;
1303 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1304 unsigned long flags;
1305
1306
1307 dbg("%s - port %d", __func__, port->number);
1308
1309 spin_lock_irqsave(&tport->tp_lock, flags);
1310
1311 if (tport->tp_write_urb_in_use)
1312 goto unlock;
1313
1314 count = ti_buf_get(tport->tp_write_buf,
1315 port->write_urb->transfer_buffer,
1316 port->bulk_out_size);
1317
1318 if (count == 0)
1319 goto unlock;
1320
1321 tport->tp_write_urb_in_use = 1;
1322
1323 spin_unlock_irqrestore(&tport->tp_lock, flags);
1324
1325 usb_serial_debug_data(debug, &port->dev, __func__, count,
1326 port->write_urb->transfer_buffer);
1327
1328 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1329 usb_sndbulkpipe(port->serial->dev,
1330 port->bulk_out_endpointAddress),
1331 port->write_urb->transfer_buffer, count,
1332 ti_bulk_out_callback, tport);
1333
1334 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1335 if (result) {
1336 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1337 __func__, result);
1338 tport->tp_write_urb_in_use = 0;
1339 /* TODO: reschedule ti_send */
1340 } else {
1341 spin_lock_irqsave(&tport->tp_lock, flags);
1342 tport->tp_icount.tx += count;
1343 spin_unlock_irqrestore(&tport->tp_lock, flags);
1344 }
1345
1346 /* more room in the buffer for new writes, wakeup */
1347 if (tty)
1348 tty_wakeup(tty);
1349 tty_kref_put(tty);
1350 wake_up_interruptible(&tport->tp_write_wait);
1351 return;
1352 unlock:
1353 spin_unlock_irqrestore(&tport->tp_lock, flags);
1354 tty_kref_put(tty);
1355 return;
1356 }
1357
1358
1359 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1360 {
1361 unsigned long flags;
1362 int status;
1363
1364 status = ti_write_byte(tport->tp_tdev,
1365 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1366 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1367
1368 spin_lock_irqsave(&tport->tp_lock, flags);
1369 if (!status)
1370 tport->tp_shadow_mcr = mcr;
1371 spin_unlock_irqrestore(&tport->tp_lock, flags);
1372
1373 return status;
1374 }
1375
1376
1377 static int ti_get_lsr(struct ti_port *tport)
1378 {
1379 int size, status;
1380 struct ti_device *tdev = tport->tp_tdev;
1381 struct usb_serial_port *port = tport->tp_port;
1382 int port_number = port->number - port->serial->minor;
1383 struct ti_port_status *data;
1384
1385 dbg("%s - port %d", __func__, port->number);
1386
1387 size = sizeof(struct ti_port_status);
1388 data = kmalloc(size, GFP_KERNEL);
1389 if (!data) {
1390 dev_err(&port->dev, "%s - out of memory\n", __func__);
1391 return -ENOMEM;
1392 }
1393
1394 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1395 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1396 if (status) {
1397 dev_err(&port->dev,
1398 "%s - get port status command failed, %d\n",
1399 __func__, status);
1400 goto free_data;
1401 }
1402
1403 dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1404
1405 tport->tp_lsr = data->bLSR;
1406
1407 free_data:
1408 kfree(data);
1409 return status;
1410 }
1411
1412
1413 static int ti_get_serial_info(struct ti_port *tport,
1414 struct serial_struct __user *ret_arg)
1415 {
1416 struct usb_serial_port *port = tport->tp_port;
1417 struct serial_struct ret_serial;
1418
1419 if (!ret_arg)
1420 return -EFAULT;
1421
1422 memset(&ret_serial, 0, sizeof(ret_serial));
1423
1424 ret_serial.type = PORT_16550A;
1425 ret_serial.line = port->serial->minor;
1426 ret_serial.port = port->number - port->serial->minor;
1427 ret_serial.flags = tport->tp_flags;
1428 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1429 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1430 ret_serial.closing_wait = tport->tp_closing_wait;
1431
1432 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1433 return -EFAULT;
1434
1435 return 0;
1436 }
1437
1438
1439 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1440 struct serial_struct __user *new_arg)
1441 {
1442 struct serial_struct new_serial;
1443
1444 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1445 return -EFAULT;
1446
1447 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1448 tty->low_latency = (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1449 tport->tp_closing_wait = new_serial.closing_wait;
1450
1451 return 0;
1452 }
1453
1454
1455 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1456 {
1457 struct async_icount *icount;
1458 struct tty_struct *tty;
1459 unsigned long flags;
1460
1461 dbg("%s - msr 0x%02X", __func__, msr);
1462
1463 if (msr & TI_MSR_DELTA_MASK) {
1464 spin_lock_irqsave(&tport->tp_lock, flags);
1465 icount = &tport->tp_icount;
1466 if (msr & TI_MSR_DELTA_CTS)
1467 icount->cts++;
1468 if (msr & TI_MSR_DELTA_DSR)
1469 icount->dsr++;
1470 if (msr & TI_MSR_DELTA_CD)
1471 icount->dcd++;
1472 if (msr & TI_MSR_DELTA_RI)
1473 icount->rng++;
1474 wake_up_interruptible(&tport->tp_msr_wait);
1475 spin_unlock_irqrestore(&tport->tp_lock, flags);
1476 }
1477
1478 tport->tp_msr = msr & TI_MSR_MASK;
1479
1480 /* handle CTS flow control */
1481 tty = tty_port_tty_get(&tport->tp_port->port);
1482 if (tty && C_CRTSCTS(tty)) {
1483 if (msr & TI_MSR_CTS) {
1484 tty->hw_stopped = 0;
1485 tty_wakeup(tty);
1486 } else {
1487 tty->hw_stopped = 1;
1488 }
1489 }
1490 tty_kref_put(tty);
1491 }
1492
1493
1494 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1495 {
1496 struct ti_device *tdev = tport->tp_tdev;
1497 struct usb_serial_port *port = tport->tp_port;
1498 wait_queue_t wait;
1499
1500 dbg("%s - port %d", __func__, port->number);
1501
1502 spin_lock_irq(&tport->tp_lock);
1503
1504 /* wait for data to drain from the buffer */
1505 tdev->td_urb_error = 0;
1506 init_waitqueue_entry(&wait, current);
1507 add_wait_queue(&tport->tp_write_wait, &wait);
1508 for (;;) {
1509 set_current_state(TASK_INTERRUPTIBLE);
1510 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1511 || timeout == 0 || signal_pending(current)
1512 || tdev->td_urb_error
1513 || port->serial->disconnected) /* disconnect */
1514 break;
1515 spin_unlock_irq(&tport->tp_lock);
1516 timeout = schedule_timeout(timeout);
1517 spin_lock_irq(&tport->tp_lock);
1518 }
1519 set_current_state(TASK_RUNNING);
1520 remove_wait_queue(&tport->tp_write_wait, &wait);
1521
1522 /* flush any remaining data in the buffer */
1523 if (flush)
1524 ti_buf_clear(tport->tp_write_buf);
1525
1526 spin_unlock_irq(&tport->tp_lock);
1527
1528 mutex_lock(&port->serial->disc_mutex);
1529 /* wait for data to drain from the device */
1530 /* wait for empty tx register, plus 20 ms */
1531 timeout += jiffies;
1532 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1533 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1534 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1535 && !port->serial->disconnected) {
1536 if (ti_get_lsr(tport))
1537 break;
1538 mutex_unlock(&port->serial->disc_mutex);
1539 msleep_interruptible(20);
1540 mutex_lock(&port->serial->disc_mutex);
1541 }
1542 mutex_unlock(&port->serial->disc_mutex);
1543 }
1544
1545
1546 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1547 {
1548 unsigned long flags;
1549
1550 spin_lock_irqsave(&tport->tp_lock, flags);
1551
1552 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1553 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1554
1555 spin_unlock_irqrestore(&tport->tp_lock, flags);
1556 }
1557
1558
1559 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1560 {
1561 struct urb *urb;
1562 int status = 0;
1563 unsigned long flags;
1564
1565 spin_lock_irqsave(&tport->tp_lock, flags);
1566
1567 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1568 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1569 urb = tport->tp_port->read_urb;
1570 spin_unlock_irqrestore(&tport->tp_lock, flags);
1571 urb->complete = ti_bulk_in_callback;
1572 urb->context = tport;
1573 urb->dev = tport->tp_port->serial->dev;
1574 status = usb_submit_urb(urb, GFP_KERNEL);
1575 } else {
1576 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1577 spin_unlock_irqrestore(&tport->tp_lock, flags);
1578 }
1579
1580 return status;
1581 }
1582
1583
1584 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1585 __u16 moduleid, __u16 value, __u8 *data, int size)
1586 {
1587 int status;
1588
1589 status = usb_control_msg(tdev->td_serial->dev,
1590 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1591 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1592 value, moduleid, data, size, 1000);
1593
1594 if (status == size)
1595 status = 0;
1596
1597 if (status > 0)
1598 status = -ECOMM;
1599
1600 return status;
1601 }
1602
1603
1604 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1605 __u16 moduleid, __u16 value, __u8 *data, int size)
1606 {
1607 int status;
1608
1609 status = usb_control_msg(tdev->td_serial->dev,
1610 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1611 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1612 value, moduleid, data, size, 1000);
1613
1614 if (status == size)
1615 status = 0;
1616
1617 if (status > 0)
1618 status = -ECOMM;
1619
1620 return status;
1621 }
1622
1623
1624 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1625 __u8 mask, __u8 byte)
1626 {
1627 int status;
1628 unsigned int size;
1629 struct ti_write_data_bytes *data;
1630 struct device *dev = &tdev->td_serial->dev->dev;
1631
1632 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1633 __func__, addr, mask, byte);
1634
1635 size = sizeof(struct ti_write_data_bytes) + 2;
1636 data = kmalloc(size, GFP_KERNEL);
1637 if (!data) {
1638 dev_err(dev, "%s - out of memory\n", __func__);
1639 return -ENOMEM;
1640 }
1641
1642 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1643 data->bDataType = TI_RW_DATA_BYTE;
1644 data->bDataCounter = 1;
1645 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1646 data->wBaseAddrLo = cpu_to_be16(addr);
1647 data->bData[0] = mask;
1648 data->bData[1] = byte;
1649
1650 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1651 (__u8 *)data, size);
1652
1653 if (status < 0)
1654 dev_err(dev, "%s - failed, %d\n", __func__, status);
1655
1656 kfree(data);
1657
1658 return status;
1659 }
1660
1661 static int ti_do_download(struct usb_device *dev, int pipe,
1662 u8 *buffer, int size)
1663 {
1664 int pos;
1665 u8 cs = 0;
1666 int done;
1667 struct ti_firmware_header *header;
1668 int status;
1669 int len;
1670
1671 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1672 cs = (__u8)(cs + buffer[pos]);
1673
1674 header = (struct ti_firmware_header *)buffer;
1675 header->wLength = cpu_to_le16((__u16)(size
1676 - sizeof(struct ti_firmware_header)));
1677 header->bCheckSum = cs;
1678
1679 dbg("%s - downloading firmware", __func__);
1680 for (pos = 0; pos < size; pos += done) {
1681 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1682 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1683 &done, 1000);
1684 if (status)
1685 break;
1686 }
1687 return status;
1688 }
1689
1690 static int ti_download_firmware(struct ti_device *tdev)
1691 {
1692 int status;
1693 int buffer_size;
1694 __u8 *buffer;
1695 struct usb_device *dev = tdev->td_serial->dev;
1696 unsigned int pipe = usb_sndbulkpipe(dev,
1697 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1698 const struct firmware *fw_p;
1699 char buf[32];
1700
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 }
1718 }
1719 if (buf[0] == '\0') {
1720 if (tdev->td_is_3410)
1721 strcpy(buf, "ti_3410.fw");
1722 else
1723 strcpy(buf, "ti_5052.fw");
1724 }
1725 status = request_firmware(&fw_p, buf, &dev->dev);
1726 }
1727 if (status) {
1728 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1729 return -ENOENT;
1730 }
1731 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1732 dev_err(&dev->dev, "%s - firmware too large\n", __func__);
1733 return -ENOENT;
1734 }
1735
1736 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1737 buffer = kmalloc(buffer_size, GFP_KERNEL);
1738 if (buffer) {
1739 memcpy(buffer, fw_p->data, fw_p->size);
1740 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1741 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1742 kfree(buffer);
1743 } else {
1744 status = -ENOMEM;
1745 }
1746 release_firmware(fw_p);
1747 if (status) {
1748 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1749 __func__, status);
1750 return status;
1751 }
1752
1753 dbg("%s - download successful", __func__);
1754
1755 return 0;
1756 }
1757
1758
1759 /* Circular Buffer Functions */
1760
1761 /*
1762 * ti_buf_alloc
1763 *
1764 * Allocate a circular buffer and all associated memory.
1765 */
1766
1767 static struct circ_buf *ti_buf_alloc(void)
1768 {
1769 struct circ_buf *cb;
1770
1771 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1772 if (cb == NULL)
1773 return NULL;
1774
1775 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1776 if (cb->buf == NULL) {
1777 kfree(cb);
1778 return NULL;
1779 }
1780
1781 ti_buf_clear(cb);
1782
1783 return cb;
1784 }
1785
1786
1787 /*
1788 * ti_buf_free
1789 *
1790 * Free the buffer and all associated memory.
1791 */
1792
1793 static void ti_buf_free(struct circ_buf *cb)
1794 {
1795 kfree(cb->buf);
1796 kfree(cb);
1797 }
1798
1799
1800 /*
1801 * ti_buf_clear
1802 *
1803 * Clear out all data in the circular buffer.
1804 */
1805
1806 static void ti_buf_clear(struct circ_buf *cb)
1807 {
1808 cb->head = cb->tail = 0;
1809 }
1810
1811
1812 /*
1813 * ti_buf_data_avail
1814 *
1815 * Return the number of bytes of data available in the circular
1816 * buffer.
1817 */
1818
1819 static int ti_buf_data_avail(struct circ_buf *cb)
1820 {
1821 return CIRC_CNT(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1822 }
1823
1824
1825 /*
1826 * ti_buf_space_avail
1827 *
1828 * Return the number of bytes of space available in the circular
1829 * buffer.
1830 */
1831
1832 static int ti_buf_space_avail(struct circ_buf *cb)
1833 {
1834 return CIRC_SPACE(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1835 }
1836
1837
1838 /*
1839 * ti_buf_put
1840 *
1841 * Copy data data from a user buffer and put it into the circular buffer.
1842 * Restrict to the amount of space available.
1843 *
1844 * Return the number of bytes copied.
1845 */
1846
1847 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1848 {
1849 int c, ret = 0;
1850
1851 while (1) {
1852 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1853 if (count < c)
1854 c = count;
1855 if (c <= 0)
1856 break;
1857 memcpy(cb->buf + cb->head, buf, c);
1858 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1859 buf += c;
1860 count -= c;
1861 ret += c;
1862 }
1863
1864 return ret;
1865 }
1866
1867
1868 /*
1869 * ti_buf_get
1870 *
1871 * Get data from the circular buffer and copy to the given buffer.
1872 * Restrict to the amount of data available.
1873 *
1874 * Return the number of bytes copied.
1875 */
1876
1877 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1878 {
1879 int c, ret = 0;
1880
1881 while (1) {
1882 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1883 if (count < c)
1884 c = count;
1885 if (c <= 0)
1886 break;
1887 memcpy(buf, cb->buf + cb->tail, c);
1888 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1889 buf += c;
1890 count -= c;
1891 ret += c;
1892 }
1893
1894 return ret;
1895 }
AMDTP streaming driver for the Linux FireWire stack (Juju)