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USB: new id for ti_usb_3410_5052 driver
[linux-2.6/mini2440.git] / drivers / usb / serial / ti_usb_3410_5052.c
blobbaf591137b806134357daeb9e1f8fb383c5eb9c1
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 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
188 };
189
190 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
191 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
192 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
193 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
194 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
195 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
196 };
197
198 static struct usb_device_id ti_id_table_combined[6+2*TI_EXTRA_VID_PID_COUNT+1] = {
199 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
200 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
201 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
202 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
203 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
204 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
205 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
206 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
207 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
208 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
209 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
210 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
211 { }
212 };
213
214 static struct usb_driver ti_usb_driver = {
215 .name = "ti_usb_3410_5052",
216 .probe = usb_serial_probe,
217 .disconnect = usb_serial_disconnect,
218 .id_table = ti_id_table_combined,
219 .no_dynamic_id = 1,
220 };
221
222 static struct usb_serial_driver ti_1port_device = {
223 .driver = {
224 .owner = THIS_MODULE,
225 .name = "ti_usb_3410_5052_1",
226 },
227 .description = "TI USB 3410 1 port adapter",
228 .usb_driver = &ti_usb_driver,
229 .id_table = ti_id_table_3410,
230 .num_ports = 1,
231 .attach = ti_startup,
232 .shutdown = ti_shutdown,
233 .open = ti_open,
234 .close = ti_close,
235 .write = ti_write,
236 .write_room = ti_write_room,
237 .chars_in_buffer = ti_chars_in_buffer,
238 .throttle = ti_throttle,
239 .unthrottle = ti_unthrottle,
240 .ioctl = ti_ioctl,
241 .set_termios = ti_set_termios,
242 .tiocmget = ti_tiocmget,
243 .tiocmset = ti_tiocmset,
244 .break_ctl = ti_break,
245 .read_int_callback = ti_interrupt_callback,
246 .read_bulk_callback = ti_bulk_in_callback,
247 .write_bulk_callback = ti_bulk_out_callback,
248 };
249
250 static struct usb_serial_driver ti_2port_device = {
251 .driver = {
252 .owner = THIS_MODULE,
253 .name = "ti_usb_3410_5052_2",
254 },
255 .description = "TI USB 5052 2 port adapter",
256 .usb_driver = &ti_usb_driver,
257 .id_table = ti_id_table_5052,
258 .num_ports = 2,
259 .attach = ti_startup,
260 .shutdown = ti_shutdown,
261 .open = ti_open,
262 .close = ti_close,
263 .write = ti_write,
264 .write_room = ti_write_room,
265 .chars_in_buffer = ti_chars_in_buffer,
266 .throttle = ti_throttle,
267 .unthrottle = ti_unthrottle,
268 .ioctl = ti_ioctl,
269 .set_termios = ti_set_termios,
270 .tiocmget = ti_tiocmget,
271 .tiocmset = ti_tiocmset,
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
292 module_param(debug, bool, S_IRUGO | S_IWUSR);
293 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
294
295 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
296 MODULE_PARM_DESC(low_latency,
297 "TTY low_latency flag, 0=off, 1=on, default is off");
298
299 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
300 MODULE_PARM_DESC(closing_wait,
301 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
302
303 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
304 MODULE_PARM_DESC(vendor_3410,
305 "Vendor ids for 3410 based devices, 1-5 short integers");
306 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
307 MODULE_PARM_DESC(product_3410,
308 "Product ids for 3410 based devices, 1-5 short integers");
309 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
310 MODULE_PARM_DESC(vendor_5052,
311 "Vendor ids for 5052 based devices, 1-5 short integers");
312 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
313 MODULE_PARM_DESC(product_5052,
314 "Product ids for 5052 based devices, 1-5 short integers");
315
316 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
317
318
319 /* Functions */
320
321 static int __init ti_init(void)
322 {
323 int i, j, c;
324 int ret;
325
326 /* insert extra vendor and product ids */
327 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
328 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
329 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
330 ti_id_table_3410[j].idVendor = vendor_3410[i];
331 ti_id_table_3410[j].idProduct = product_3410[i];
332 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
333 ti_id_table_combined[c].idVendor = vendor_3410[i];
334 ti_id_table_combined[c].idProduct = product_3410[i];
335 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
336 }
337 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
338 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
339 ti_id_table_5052[j].idVendor = vendor_5052[i];
340 ti_id_table_5052[j].idProduct = product_5052[i];
341 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
342 ti_id_table_combined[c].idVendor = vendor_5052[i];
343 ti_id_table_combined[c].idProduct = product_5052[i];
344 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
345 }
346
347 ret = usb_serial_register(&ti_1port_device);
348 if (ret)
349 goto failed_1port;
350 ret = usb_serial_register(&ti_2port_device);
351 if (ret)
352 goto failed_2port;
353
354 ret = usb_register(&ti_usb_driver);
355 if (ret)
356 goto failed_usb;
357
358 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
359 TI_DRIVER_DESC "\n");
360
361 return 0;
362
363 failed_usb:
364 usb_serial_deregister(&ti_2port_device);
365 failed_2port:
366 usb_serial_deregister(&ti_1port_device);
367 failed_1port:
368 return ret;
369 }
370
371
372 static void __exit ti_exit(void)
373 {
374 usb_serial_deregister(&ti_1port_device);
375 usb_serial_deregister(&ti_2port_device);
376 usb_deregister(&ti_usb_driver);
377 }
378
379
380 module_init(ti_init);
381 module_exit(ti_exit);
382
383
384 static int ti_startup(struct usb_serial *serial)
385 {
386 struct ti_device *tdev;
387 struct ti_port *tport;
388 struct usb_device *dev = serial->dev;
389 int status;
390 int i;
391
392
393 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
394 __func__, le16_to_cpu(dev->descriptor.idProduct),
395 dev->descriptor.bNumConfigurations,
396 dev->actconfig->desc.bConfigurationValue);
397
398 /* create device structure */
399 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
400 if (tdev == NULL) {
401 dev_err(&dev->dev, "%s - out of memory\n", __func__);
402 return -ENOMEM;
403 }
404 mutex_init(&tdev->td_open_close_lock);
405 tdev->td_serial = serial;
406 usb_set_serial_data(serial, tdev);
407
408 /* determine device type */
409 if (usb_match_id(serial->interface, ti_id_table_3410))
410 tdev->td_is_3410 = 1;
411 dbg("%s - device type is %s", __func__,
412 tdev->td_is_3410 ? "3410" : "5052");
413
414 /* if we have only 1 configuration, download firmware */
415 if (dev->descriptor.bNumConfigurations == 1) {
416 if ((status = ti_download_firmware(tdev)) != 0)
417 goto free_tdev;
418
419 /* 3410 must be reset, 5052 resets itself */
420 if (tdev->td_is_3410) {
421 msleep_interruptible(100);
422 usb_reset_device(dev);
423 }
424
425 status = -ENODEV;
426 goto free_tdev;
427 }
428
429 /* the second configuration must be set */
430 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
431 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
432 status = status ? status : -ENODEV;
433 goto free_tdev;
434 }
435
436 /* set up port structures */
437 for (i = 0; i < serial->num_ports; ++i) {
438 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
439 if (tport == NULL) {
440 dev_err(&dev->dev, "%s - out of memory\n", __func__);
441 status = -ENOMEM;
442 goto free_tports;
443 }
444 spin_lock_init(&tport->tp_lock);
445 tport->tp_uart_base_addr = (i == 0 ?
446 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
447 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
448 tport->tp_closing_wait = closing_wait;
449 init_waitqueue_head(&tport->tp_msr_wait);
450 init_waitqueue_head(&tport->tp_write_wait);
451 tport->tp_write_buf = ti_buf_alloc();
452 if (tport->tp_write_buf == NULL) {
453 dev_err(&dev->dev, "%s - out of memory\n", __func__);
454 kfree(tport);
455 status = -ENOMEM;
456 goto free_tports;
457 }
458 tport->tp_port = serial->port[i];
459 tport->tp_tdev = tdev;
460 usb_set_serial_port_data(serial->port[i], tport);
461 tport->tp_uart_mode = 0; /* default is RS232 */
462 }
463
464 return 0;
465
466 free_tports:
467 for (--i; i >= 0; --i) {
468 tport = usb_get_serial_port_data(serial->port[i]);
469 ti_buf_free(tport->tp_write_buf);
470 kfree(tport);
471 usb_set_serial_port_data(serial->port[i], NULL);
472 }
473 free_tdev:
474 kfree(tdev);
475 usb_set_serial_data(serial, NULL);
476 return status;
477 }
478
479
480 static void ti_shutdown(struct usb_serial *serial)
481 {
482 int i;
483 struct ti_device *tdev = usb_get_serial_data(serial);
484 struct ti_port *tport;
485
486 dbg("%s", __func__);
487
488 for (i = 0; i < serial->num_ports; ++i) {
489 tport = usb_get_serial_port_data(serial->port[i]);
490 if (tport) {
491 ti_buf_free(tport->tp_write_buf);
492 kfree(tport);
493 usb_set_serial_port_data(serial->port[i], NULL);
494 }
495 }
496
497 kfree(tdev);
498 usb_set_serial_data(serial, NULL);
499 }
500
501
502 static int ti_open(struct tty_struct *tty,
503 struct usb_serial_port *port, struct file *file)
504 {
505 struct ti_port *tport = usb_get_serial_port_data(port);
506 struct ti_device *tdev;
507 struct usb_device *dev;
508 struct urb *urb;
509 int port_number;
510 int status;
511 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
512 TI_PIPE_TIMEOUT_ENABLE |
513 (TI_TRANSFER_TIMEOUT << 2));
514
515 dbg("%s - port %d", __func__, port->number);
516
517 if (tport == NULL)
518 return -ENODEV;
519
520 dev = port->serial->dev;
521 tdev = tport->tp_tdev;
522
523 /* only one open on any port on a device at a time */
524 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
525 return -ERESTARTSYS;
526
527 if (tty)
528 tty->low_latency =
529 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
530
531 port_number = port->number - port->serial->minor;
532
533 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
534
535 tport->tp_msr = 0;
536 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
537
538 /* start interrupt urb the first time a port is opened on this device */
539 if (tdev->td_open_port_count == 0) {
540 dbg("%s - start interrupt in urb", __func__);
541 urb = tdev->td_serial->port[0]->interrupt_in_urb;
542 if (!urb) {
543 dev_err(&port->dev, "%s - no interrupt urb\n",
544 __func__);
545 status = -EINVAL;
546 goto release_lock;
547 }
548 urb->complete = ti_interrupt_callback;
549 urb->context = tdev;
550 urb->dev = dev;
551 status = usb_submit_urb(urb, GFP_KERNEL);
552 if (status) {
553 dev_err(&port->dev,
554 "%s - submit interrupt urb failed, %d\n",
555 __func__, status);
556 goto release_lock;
557 }
558 }
559
560 if (tty)
561 ti_set_termios(tty, port, tty->termios);
562
563 dbg("%s - sending TI_OPEN_PORT", __func__);
564 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
565 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
566 if (status) {
567 dev_err(&port->dev, "%s - cannot send open command, %d\n",
568 __func__, status);
569 goto unlink_int_urb;
570 }
571
572 dbg("%s - sending TI_START_PORT", __func__);
573 status = ti_command_out_sync(tdev, TI_START_PORT,
574 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
575 if (status) {
576 dev_err(&port->dev, "%s - cannot send start command, %d\n",
577 __func__, status);
578 goto unlink_int_urb;
579 }
580
581 dbg("%s - sending TI_PURGE_PORT", __func__);
582 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
583 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
584 if (status) {
585 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
586 __func__, status);
587 goto unlink_int_urb;
588 }
589 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
590 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
591 if (status) {
592 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
593 __func__, status);
594 goto unlink_int_urb;
595 }
596
597 /* reset the data toggle on the bulk endpoints to work around bug in
598 * host controllers where things get out of sync some times */
599 usb_clear_halt(dev, port->write_urb->pipe);
600 usb_clear_halt(dev, port->read_urb->pipe);
601
602 if (tty)
603 ti_set_termios(tty, port, tty->termios);
604
605 dbg("%s - sending TI_OPEN_PORT (2)", __func__);
606 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
607 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
608 if (status) {
609 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
610 __func__, status);
611 goto unlink_int_urb;
612 }
613
614 dbg("%s - sending TI_START_PORT (2)", __func__);
615 status = ti_command_out_sync(tdev, TI_START_PORT,
616 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
617 if (status) {
618 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
619 __func__, status);
620 goto unlink_int_urb;
621 }
622
623 /* start read urb */
624 dbg("%s - start read urb", __func__);
625 urb = port->read_urb;
626 if (!urb) {
627 dev_err(&port->dev, "%s - no read urb\n", __func__);
628 status = -EINVAL;
629 goto unlink_int_urb;
630 }
631 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
632 urb->complete = ti_bulk_in_callback;
633 urb->context = tport;
634 urb->dev = dev;
635 status = usb_submit_urb(urb, GFP_KERNEL);
636 if (status) {
637 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
638 __func__, status);
639 goto unlink_int_urb;
640 }
641
642 tport->tp_is_open = 1;
643 ++tdev->td_open_port_count;
644
645 goto release_lock;
646
647 unlink_int_urb:
648 if (tdev->td_open_port_count == 0)
649 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
650 release_lock:
651 mutex_unlock(&tdev->td_open_close_lock);
652 dbg("%s - exit %d", __func__, status);
653 return status;
654 }
655
656
657 static void ti_close(struct tty_struct *tty, struct usb_serial_port *port,
658 struct file *file)
659 {
660 struct ti_device *tdev;
661 struct ti_port *tport;
662 int port_number;
663 int status;
664 int do_unlock;
665
666 dbg("%s - port %d", __func__, port->number);
667
668 tdev = usb_get_serial_data(port->serial);
669 tport = usb_get_serial_port_data(port);
670 if (tdev == NULL || tport == NULL)
671 return;
672
673 tport->tp_is_open = 0;
674
675 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
676
677 usb_kill_urb(port->read_urb);
678 usb_kill_urb(port->write_urb);
679 tport->tp_write_urb_in_use = 0;
680
681 port_number = port->number - port->serial->minor;
682
683 dbg("%s - sending TI_CLOSE_PORT", __func__);
684 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
685 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
686 if (status)
687 dev_err(&port->dev,
688 "%s - cannot send close port command, %d\n"
689 , __func__, status);
690
691 /* if mutex_lock is interrupted, continue anyway */
692 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
693 --tport->tp_tdev->td_open_port_count;
694 if (tport->tp_tdev->td_open_port_count <= 0) {
695 /* last port is closed, shut down interrupt urb */
696 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
697 tport->tp_tdev->td_open_port_count = 0;
698 }
699 if (do_unlock)
700 mutex_unlock(&tdev->td_open_close_lock);
701
702 dbg("%s - exit", __func__);
703 }
704
705
706 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
707 const unsigned char *data, int count)
708 {
709 struct ti_port *tport = usb_get_serial_port_data(port);
710 unsigned long flags;
711
712 dbg("%s - port %d", __func__, port->number);
713
714 if (count == 0) {
715 dbg("%s - write request of 0 bytes", __func__);
716 return 0;
717 }
718
719 if (tport == NULL || !tport->tp_is_open)
720 return -ENODEV;
721
722 spin_lock_irqsave(&tport->tp_lock, flags);
723 count = ti_buf_put(tport->tp_write_buf, data, count);
724 spin_unlock_irqrestore(&tport->tp_lock, flags);
725
726 ti_send(tport);
727
728 return count;
729 }
730
731
732 static int ti_write_room(struct tty_struct *tty)
733 {
734 struct usb_serial_port *port = tty->driver_data;
735 struct ti_port *tport = usb_get_serial_port_data(port);
736 int room = 0;
737 unsigned long flags;
738
739 dbg("%s - port %d", __func__, port->number);
740
741 if (tport == NULL)
742 return -ENODEV;
743
744 spin_lock_irqsave(&tport->tp_lock, flags);
745 room = ti_buf_space_avail(tport->tp_write_buf);
746 spin_unlock_irqrestore(&tport->tp_lock, flags);
747
748 dbg("%s - returns %d", __func__, room);
749 return room;
750 }
751
752
753 static int ti_chars_in_buffer(struct tty_struct *tty)
754 {
755 struct usb_serial_port *port = tty->driver_data;
756 struct ti_port *tport = usb_get_serial_port_data(port);
757 int chars = 0;
758 unsigned long flags;
759
760 dbg("%s - port %d", __func__, port->number);
761
762 if (tport == NULL)
763 return -ENODEV;
764
765 spin_lock_irqsave(&tport->tp_lock, flags);
766 chars = ti_buf_data_avail(tport->tp_write_buf);
767 spin_unlock_irqrestore(&tport->tp_lock, flags);
768
769 dbg("%s - returns %d", __func__, chars);
770 return chars;
771 }
772
773
774 static void ti_throttle(struct tty_struct *tty)
775 {
776 struct usb_serial_port *port = tty->driver_data;
777 struct ti_port *tport = usb_get_serial_port_data(port);
778
779 dbg("%s - port %d", __func__, port->number);
780
781 if (tport == NULL)
782 return;
783
784 if (I_IXOFF(tty) || C_CRTSCTS(tty))
785 ti_stop_read(tport, tty);
786
787 }
788
789
790 static void ti_unthrottle(struct tty_struct *tty)
791 {
792 struct usb_serial_port *port = tty->driver_data;
793 struct ti_port *tport = usb_get_serial_port_data(port);
794 int status;
795
796 dbg("%s - port %d", __func__, port->number);
797
798 if (tport == NULL)
799 return;
800
801 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
802 status = ti_restart_read(tport, tty);
803 if (status)
804 dev_err(&port->dev, "%s - cannot restart read, %d\n",
805 __func__, status);
806 }
807 }
808
809
810 static int ti_ioctl(struct tty_struct *tty, struct file *file,
811 unsigned int cmd, unsigned long arg)
812 {
813 struct usb_serial_port *port = tty->driver_data;
814 struct ti_port *tport = usb_get_serial_port_data(port);
815 struct async_icount cnow;
816 struct async_icount cprev;
817
818 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
819
820 if (tport == NULL)
821 return -ENODEV;
822
823 switch (cmd) {
824 case TIOCGSERIAL:
825 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
826 return ti_get_serial_info(tport,
827 (struct serial_struct __user *)arg);
828 case TIOCSSERIAL:
829 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
830 return ti_set_serial_info(tty, tport,
831 (struct serial_struct __user *)arg);
832 case TIOCMIWAIT:
833 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
834 cprev = tport->tp_icount;
835 while (1) {
836 interruptible_sleep_on(&tport->tp_msr_wait);
837 if (signal_pending(current))
838 return -ERESTARTSYS;
839 cnow = tport->tp_icount;
840 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
841 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
842 return -EIO; /* no change => error */
843 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
844 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
845 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
846 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
847 return 0;
848 cprev = cnow;
849 }
850 break;
851 case TIOCGICOUNT:
852 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
853 __func__, port->number,
854 tport->tp_icount.rx, tport->tp_icount.tx);
855 if (copy_to_user((void __user *)arg, &tport->tp_icount,
856 sizeof(tport->tp_icount)))
857 return -EFAULT;
858 return 0;
859 }
860 return -ENOIOCTLCMD;
861 }
862
863
864 static void ti_set_termios(struct tty_struct *tty,
865 struct usb_serial_port *port, struct ktermios *old_termios)
866 {
867 struct ti_port *tport = usb_get_serial_port_data(port);
868 struct ti_uart_config *config;
869 tcflag_t cflag, iflag;
870 int baud;
871 int status;
872 int port_number = port->number - port->serial->minor;
873 unsigned int mcr;
874
875 dbg("%s - port %d", __func__, port->number);
876
877 cflag = tty->termios->c_cflag;
878 iflag = tty->termios->c_iflag;
879
880 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
881 dbg("%s - old clfag %08x, old iflag %08x", __func__,
882 old_termios->c_cflag, old_termios->c_iflag);
883
884 if (tport == NULL)
885 return;
886
887 config = kmalloc(sizeof(*config), GFP_KERNEL);
888 if (!config) {
889 dev_err(&port->dev, "%s - out of memory\n", __func__);
890 return;
891 }
892
893 config->wFlags = 0;
894
895 /* these flags must be set */
896 config->wFlags |= TI_UART_ENABLE_MS_INTS;
897 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
898 config->bUartMode = (__u8)(tport->tp_uart_mode);
899
900 switch (cflag & CSIZE) {
901 case CS5:
902 config->bDataBits = TI_UART_5_DATA_BITS;
903 break;
904 case CS6:
905 config->bDataBits = TI_UART_6_DATA_BITS;
906 break;
907 case CS7:
908 config->bDataBits = TI_UART_7_DATA_BITS;
909 break;
910 default:
911 case CS8:
912 config->bDataBits = TI_UART_8_DATA_BITS;
913 break;
914 }
915
916 /* CMSPAR isn't supported by this driver */
917 tty->termios->c_cflag &= ~CMSPAR;
918
919 if (cflag & PARENB) {
920 if (cflag & PARODD) {
921 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
922 config->bParity = TI_UART_ODD_PARITY;
923 } else {
924 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
925 config->bParity = TI_UART_EVEN_PARITY;
926 }
927 } else {
928 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
929 config->bParity = TI_UART_NO_PARITY;
930 }
931
932 if (cflag & CSTOPB)
933 config->bStopBits = TI_UART_2_STOP_BITS;
934 else
935 config->bStopBits = TI_UART_1_STOP_BITS;
936
937 if (cflag & CRTSCTS) {
938 /* RTS flow control must be off to drop RTS for baud rate B0 */
939 if ((cflag & CBAUD) != B0)
940 config->wFlags |= TI_UART_ENABLE_RTS_IN;
941 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
942 } else {
943 tty->hw_stopped = 0;
944 ti_restart_read(tport, tty);
945 }
946
947 if (I_IXOFF(tty) || I_IXON(tty)) {
948 config->cXon = START_CHAR(tty);
949 config->cXoff = STOP_CHAR(tty);
950
951 if (I_IXOFF(tty))
952 config->wFlags |= TI_UART_ENABLE_X_IN;
953 else
954 ti_restart_read(tport, tty);
955
956 if (I_IXON(tty))
957 config->wFlags |= TI_UART_ENABLE_X_OUT;
958 }
959
960 baud = tty_get_baud_rate(tty);
961 if (!baud)
962 baud = 9600;
963 if (tport->tp_tdev->td_is_3410)
964 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
965 else
966 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
967
968 /* FIXME: Should calculate resulting baud here and report it back */
969 if ((cflag & CBAUD) != B0)
970 tty_encode_baud_rate(tty, baud, baud);
971
972 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
973 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
974
975 cpu_to_be16s(&config->wBaudRate);
976 cpu_to_be16s(&config->wFlags);
977
978 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
979 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
980 sizeof(*config));
981 if (status)
982 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
983 __func__, port_number, status);
984
985 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
986 mcr = tport->tp_shadow_mcr;
987 /* if baud rate is B0, clear RTS and DTR */
988 if ((cflag & CBAUD) == B0)
989 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
990 status = ti_set_mcr(tport, mcr);
991 if (status)
992 dev_err(&port->dev,
993 "%s - cannot set modem control on port %d, %d\n",
994 __func__, port_number, status);
995
996 kfree(config);
997 }
998
999
1000 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
1001 {
1002 struct usb_serial_port *port = tty->driver_data;
1003 struct ti_port *tport = usb_get_serial_port_data(port);
1004 unsigned int result;
1005 unsigned int msr;
1006 unsigned int mcr;
1007 unsigned long flags;
1008
1009 dbg("%s - port %d", __func__, port->number);
1010
1011 if (tport == NULL)
1012 return -ENODEV;
1013
1014 spin_lock_irqsave(&tport->tp_lock, flags);
1015 msr = tport->tp_msr;
1016 mcr = tport->tp_shadow_mcr;
1017 spin_unlock_irqrestore(&tport->tp_lock, flags);
1018
1019 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1020 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1021 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1022 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1023 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1024 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1025 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1026
1027 dbg("%s - 0x%04X", __func__, result);
1028
1029 return result;
1030 }
1031
1032
1033 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1034 unsigned int set, unsigned int clear)
1035 {
1036 struct usb_serial_port *port = tty->driver_data;
1037 struct ti_port *tport = usb_get_serial_port_data(port);
1038 unsigned int mcr;
1039 unsigned long flags;
1040
1041 dbg("%s - port %d", __func__, port->number);
1042
1043 if (tport == NULL)
1044 return -ENODEV;
1045
1046 spin_lock_irqsave(&tport->tp_lock, flags);
1047 mcr = tport->tp_shadow_mcr;
1048
1049 if (set & TIOCM_RTS)
1050 mcr |= TI_MCR_RTS;
1051 if (set & TIOCM_DTR)
1052 mcr |= TI_MCR_DTR;
1053 if (set & TIOCM_LOOP)
1054 mcr |= TI_MCR_LOOP;
1055
1056 if (clear & TIOCM_RTS)
1057 mcr &= ~TI_MCR_RTS;
1058 if (clear & TIOCM_DTR)
1059 mcr &= ~TI_MCR_DTR;
1060 if (clear & TIOCM_LOOP)
1061 mcr &= ~TI_MCR_LOOP;
1062 spin_unlock_irqrestore(&tport->tp_lock, flags);
1063
1064 return ti_set_mcr(tport, mcr);
1065 }
1066
1067
1068 static void ti_break(struct tty_struct *tty, int break_state)
1069 {
1070 struct usb_serial_port *port = tty->driver_data;
1071 struct ti_port *tport = usb_get_serial_port_data(port);
1072 int status;
1073
1074 dbg("%s - state = %d", __func__, break_state);
1075
1076 if (tport == NULL)
1077 return;
1078
1079 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1080
1081 status = ti_write_byte(tport->tp_tdev,
1082 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1083 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1084
1085 if (status)
1086 dbg("%s - error setting break, %d", __func__, status);
1087 }
1088
1089
1090 static void ti_interrupt_callback(struct urb *urb)
1091 {
1092 struct ti_device *tdev = urb->context;
1093 struct usb_serial_port *port;
1094 struct usb_serial *serial = tdev->td_serial;
1095 struct ti_port *tport;
1096 struct device *dev = &urb->dev->dev;
1097 unsigned char *data = urb->transfer_buffer;
1098 int length = urb->actual_length;
1099 int port_number;
1100 int function;
1101 int status = urb->status;
1102 int retval;
1103 __u8 msr;
1104
1105 dbg("%s", __func__);
1106
1107 switch (status) {
1108 case 0:
1109 break;
1110 case -ECONNRESET:
1111 case -ENOENT:
1112 case -ESHUTDOWN:
1113 dbg("%s - urb shutting down, %d", __func__, status);
1114 tdev->td_urb_error = 1;
1115 return;
1116 default:
1117 dev_err(dev, "%s - nonzero urb status, %d\n",
1118 __func__, status);
1119 tdev->td_urb_error = 1;
1120 goto exit;
1121 }
1122
1123 if (length != 2) {
1124 dbg("%s - bad packet size, %d", __func__, length);
1125 goto exit;
1126 }
1127
1128 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1129 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1130 goto exit;
1131 }
1132
1133 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1134 function = TI_GET_FUNC_FROM_CODE(data[0]);
1135
1136 dbg("%s - port_number %d, function %d, data 0x%02X",
1137 __func__, port_number, function, data[1]);
1138
1139 if (port_number >= serial->num_ports) {
1140 dev_err(dev, "%s - bad port number, %d\n",
1141 __func__, port_number);
1142 goto exit;
1143 }
1144
1145 port = serial->port[port_number];
1146
1147 tport = usb_get_serial_port_data(port);
1148 if (!tport)
1149 goto exit;
1150
1151 switch (function) {
1152 case TI_CODE_DATA_ERROR:
1153 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1154 __func__, port_number, data[1]);
1155 break;
1156
1157 case TI_CODE_MODEM_STATUS:
1158 msr = data[1];
1159 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1160 ti_handle_new_msr(tport, msr);
1161 break;
1162
1163 default:
1164 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1165 __func__, data[1]);
1166 break;
1167 }
1168
1169 exit:
1170 retval = usb_submit_urb(urb, GFP_ATOMIC);
1171 if (retval)
1172 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1173 __func__, retval);
1174 }
1175
1176
1177 static void ti_bulk_in_callback(struct urb *urb)
1178 {
1179 struct ti_port *tport = urb->context;
1180 struct usb_serial_port *port = tport->tp_port;
1181 struct device *dev = &urb->dev->dev;
1182 int status = urb->status;
1183 int retval = 0;
1184 struct tty_struct *tty;
1185
1186 dbg("%s", __func__);
1187
1188 switch (status) {
1189 case 0:
1190 break;
1191 case -ECONNRESET:
1192 case -ENOENT:
1193 case -ESHUTDOWN:
1194 dbg("%s - urb shutting down, %d", __func__, status);
1195 tport->tp_tdev->td_urb_error = 1;
1196 wake_up_interruptible(&tport->tp_write_wait);
1197 return;
1198 default:
1199 dev_err(dev, "%s - nonzero urb status, %d\n",
1200 __func__, status);
1201 tport->tp_tdev->td_urb_error = 1;
1202 wake_up_interruptible(&tport->tp_write_wait);
1203 }
1204
1205 if (status == -EPIPE)
1206 goto exit;
1207
1208 if (status) {
1209 dev_err(dev, "%s - stopping read!\n", __func__);
1210 return;
1211 }
1212
1213 tty = tty_port_tty_get(&port->port);
1214 if (tty && 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", __func__);
1220 else
1221 ti_recv(&urb->dev->dev, tty,
1222 urb->transfer_buffer,
1223 urb->actual_length);
1224
1225 spin_lock(&tport->tp_lock);
1226 tport->tp_icount.rx += urb->actual_length;
1227 spin_unlock(&tport->tp_lock);
1228 tty_kref_put(tty);
1229 }
1230
1231 exit:
1232 /* continue to read unless stopping */
1233 spin_lock(&tport->tp_lock);
1234 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1235 urb->dev = port->serial->dev;
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_buffer_request_room(tty, 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_insert_flip_string(tty, data, cnt);
1294 tty_flip_buffer_push(tty);
1295 data += cnt;
1296 length -= cnt;
1297 } while (length > 0);
1298
1299 }
1300
1301
1302 static void ti_send(struct ti_port *tport)
1303 {
1304 int count, result;
1305 struct usb_serial_port *port = tport->tp_port;
1306 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1307 unsigned long flags;
1308
1309
1310 dbg("%s - port %d", __func__, port->number);
1311
1312 spin_lock_irqsave(&tport->tp_lock, flags);
1313
1314 if (tport->tp_write_urb_in_use)
1315 goto unlock;
1316
1317 count = ti_buf_get(tport->tp_write_buf,
1318 port->write_urb->transfer_buffer,
1319 port->bulk_out_size);
1320
1321 if (count == 0)
1322 goto unlock;
1323
1324 tport->tp_write_urb_in_use = 1;
1325
1326 spin_unlock_irqrestore(&tport->tp_lock, flags);
1327
1328 usb_serial_debug_data(debug, &port->dev, __func__, count,
1329 port->write_urb->transfer_buffer);
1330
1331 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1332 usb_sndbulkpipe(port->serial->dev,
1333 port->bulk_out_endpointAddress),
1334 port->write_urb->transfer_buffer, count,
1335 ti_bulk_out_callback, tport);
1336
1337 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1338 if (result) {
1339 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1340 __func__, result);
1341 tport->tp_write_urb_in_use = 0;
1342 /* TODO: reschedule ti_send */
1343 } else {
1344 spin_lock_irqsave(&tport->tp_lock, flags);
1345 tport->tp_icount.tx += count;
1346 spin_unlock_irqrestore(&tport->tp_lock, flags);
1347 }
1348
1349 /* more room in the buffer for new writes, wakeup */
1350 if (tty)
1351 tty_wakeup(tty);
1352 tty_kref_put(tty);
1353 wake_up_interruptible(&tport->tp_write_wait);
1354 return;
1355 unlock:
1356 spin_unlock_irqrestore(&tport->tp_lock, flags);
1357 tty_kref_put(tty);
1358 return;
1359 }
1360
1361
1362 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1363 {
1364 unsigned long flags;
1365 int status;
1366
1367 status = ti_write_byte(tport->tp_tdev,
1368 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1369 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1370
1371 spin_lock_irqsave(&tport->tp_lock, flags);
1372 if (!status)
1373 tport->tp_shadow_mcr = mcr;
1374 spin_unlock_irqrestore(&tport->tp_lock, flags);
1375
1376 return status;
1377 }
1378
1379
1380 static int ti_get_lsr(struct ti_port *tport)
1381 {
1382 int size, status;
1383 struct ti_device *tdev = tport->tp_tdev;
1384 struct usb_serial_port *port = tport->tp_port;
1385 int port_number = port->number - port->serial->minor;
1386 struct ti_port_status *data;
1387
1388 dbg("%s - port %d", __func__, port->number);
1389
1390 size = sizeof(struct ti_port_status);
1391 data = kmalloc(size, GFP_KERNEL);
1392 if (!data) {
1393 dev_err(&port->dev, "%s - out of memory\n", __func__);
1394 return -ENOMEM;
1395 }
1396
1397 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1398 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1399 if (status) {
1400 dev_err(&port->dev,
1401 "%s - get port status command failed, %d\n",
1402 __func__, status);
1403 goto free_data;
1404 }
1405
1406 dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1407
1408 tport->tp_lsr = data->bLSR;
1409
1410 free_data:
1411 kfree(data);
1412 return status;
1413 }
1414
1415
1416 static int ti_get_serial_info(struct ti_port *tport,
1417 struct serial_struct __user *ret_arg)
1418 {
1419 struct usb_serial_port *port = tport->tp_port;
1420 struct serial_struct ret_serial;
1421
1422 if (!ret_arg)
1423 return -EFAULT;
1424
1425 memset(&ret_serial, 0, sizeof(ret_serial));
1426
1427 ret_serial.type = PORT_16550A;
1428 ret_serial.line = port->serial->minor;
1429 ret_serial.port = port->number - port->serial->minor;
1430 ret_serial.flags = tport->tp_flags;
1431 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1432 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1433 ret_serial.closing_wait = tport->tp_closing_wait;
1434
1435 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1436 return -EFAULT;
1437
1438 return 0;
1439 }
1440
1441
1442 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1443 struct serial_struct __user *new_arg)
1444 {
1445 struct serial_struct new_serial;
1446
1447 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1448 return -EFAULT;
1449
1450 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1451 tty->low_latency = (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1452 tport->tp_closing_wait = new_serial.closing_wait;
1453
1454 return 0;
1455 }
1456
1457
1458 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1459 {
1460 struct async_icount *icount;
1461 struct tty_struct *tty;
1462 unsigned long flags;
1463
1464 dbg("%s - msr 0x%02X", __func__, msr);
1465
1466 if (msr & TI_MSR_DELTA_MASK) {
1467 spin_lock_irqsave(&tport->tp_lock, flags);
1468 icount = &tport->tp_icount;
1469 if (msr & TI_MSR_DELTA_CTS)
1470 icount->cts++;
1471 if (msr & TI_MSR_DELTA_DSR)
1472 icount->dsr++;
1473 if (msr & TI_MSR_DELTA_CD)
1474 icount->dcd++;
1475 if (msr & TI_MSR_DELTA_RI)
1476 icount->rng++;
1477 wake_up_interruptible(&tport->tp_msr_wait);
1478 spin_unlock_irqrestore(&tport->tp_lock, flags);
1479 }
1480
1481 tport->tp_msr = msr & TI_MSR_MASK;
1482
1483 /* handle CTS flow control */
1484 tty = tty_port_tty_get(&tport->tp_port->port);
1485 if (tty && C_CRTSCTS(tty)) {
1486 if (msr & TI_MSR_CTS) {
1487 tty->hw_stopped = 0;
1488 tty_wakeup(tty);
1489 } else {
1490 tty->hw_stopped = 1;
1491 }
1492 }
1493 tty_kref_put(tty);
1494 }
1495
1496
1497 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1498 {
1499 struct ti_device *tdev = tport->tp_tdev;
1500 struct usb_serial_port *port = tport->tp_port;
1501 wait_queue_t wait;
1502
1503 dbg("%s - port %d", __func__, port->number);
1504
1505 spin_lock_irq(&tport->tp_lock);
1506
1507 /* wait for data to drain from the buffer */
1508 tdev->td_urb_error = 0;
1509 init_waitqueue_entry(&wait, current);
1510 add_wait_queue(&tport->tp_write_wait, &wait);
1511 for (;;) {
1512 set_current_state(TASK_INTERRUPTIBLE);
1513 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1514 || timeout == 0 || signal_pending(current)
1515 || tdev->td_urb_error
1516 || port->serial->disconnected) /* disconnect */
1517 break;
1518 spin_unlock_irq(&tport->tp_lock);
1519 timeout = schedule_timeout(timeout);
1520 spin_lock_irq(&tport->tp_lock);
1521 }
1522 set_current_state(TASK_RUNNING);
1523 remove_wait_queue(&tport->tp_write_wait, &wait);
1524
1525 /* flush any remaining data in the buffer */
1526 if (flush)
1527 ti_buf_clear(tport->tp_write_buf);
1528
1529 spin_unlock_irq(&tport->tp_lock);
1530
1531 mutex_lock(&port->serial->disc_mutex);
1532 /* wait for data to drain from the device */
1533 /* wait for empty tx register, plus 20 ms */
1534 timeout += jiffies;
1535 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1536 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1537 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1538 && !port->serial->disconnected) {
1539 if (ti_get_lsr(tport))
1540 break;
1541 mutex_unlock(&port->serial->disc_mutex);
1542 msleep_interruptible(20);
1543 mutex_lock(&port->serial->disc_mutex);
1544 }
1545 mutex_unlock(&port->serial->disc_mutex);
1546 }
1547
1548
1549 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1550 {
1551 unsigned long flags;
1552
1553 spin_lock_irqsave(&tport->tp_lock, flags);
1554
1555 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1556 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1557
1558 spin_unlock_irqrestore(&tport->tp_lock, flags);
1559 }
1560
1561
1562 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1563 {
1564 struct urb *urb;
1565 int status = 0;
1566 unsigned long flags;
1567
1568 spin_lock_irqsave(&tport->tp_lock, flags);
1569
1570 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1571 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1572 urb = tport->tp_port->read_urb;
1573 spin_unlock_irqrestore(&tport->tp_lock, flags);
1574 urb->complete = ti_bulk_in_callback;
1575 urb->context = tport;
1576 urb->dev = tport->tp_port->serial->dev;
1577 status = usb_submit_urb(urb, GFP_KERNEL);
1578 } else {
1579 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1580 spin_unlock_irqrestore(&tport->tp_lock, flags);
1581 }
1582
1583 return status;
1584 }
1585
1586
1587 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1588 __u16 moduleid, __u16 value, __u8 *data, int size)
1589 {
1590 int status;
1591
1592 status = usb_control_msg(tdev->td_serial->dev,
1593 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1594 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1595 value, moduleid, data, size, 1000);
1596
1597 if (status == size)
1598 status = 0;
1599
1600 if (status > 0)
1601 status = -ECOMM;
1602
1603 return status;
1604 }
1605
1606
1607 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1608 __u16 moduleid, __u16 value, __u8 *data, int size)
1609 {
1610 int status;
1611
1612 status = usb_control_msg(tdev->td_serial->dev,
1613 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1614 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1615 value, moduleid, data, size, 1000);
1616
1617 if (status == size)
1618 status = 0;
1619
1620 if (status > 0)
1621 status = -ECOMM;
1622
1623 return status;
1624 }
1625
1626
1627 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1628 __u8 mask, __u8 byte)
1629 {
1630 int status;
1631 unsigned int size;
1632 struct ti_write_data_bytes *data;
1633 struct device *dev = &tdev->td_serial->dev->dev;
1634
1635 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1636 __func__, addr, mask, byte);
1637
1638 size = sizeof(struct ti_write_data_bytes) + 2;
1639 data = kmalloc(size, GFP_KERNEL);
1640 if (!data) {
1641 dev_err(dev, "%s - out of memory\n", __func__);
1642 return -ENOMEM;
1643 }
1644
1645 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1646 data->bDataType = TI_RW_DATA_BYTE;
1647 data->bDataCounter = 1;
1648 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1649 data->wBaseAddrLo = cpu_to_be16(addr);
1650 data->bData[0] = mask;
1651 data->bData[1] = byte;
1652
1653 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1654 (__u8 *)data, size);
1655
1656 if (status < 0)
1657 dev_err(dev, "%s - failed, %d\n", __func__, status);
1658
1659 kfree(data);
1660
1661 return status;
1662 }
1663
1664 static int ti_do_download(struct usb_device *dev, int pipe,
1665 u8 *buffer, int size)
1666 {
1667 int pos;
1668 u8 cs = 0;
1669 int done;
1670 struct ti_firmware_header *header;
1671 int status;
1672 int len;
1673
1674 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1675 cs = (__u8)(cs + buffer[pos]);
1676
1677 header = (struct ti_firmware_header *)buffer;
1678 header->wLength = cpu_to_le16((__u16)(size
1679 - sizeof(struct ti_firmware_header)));
1680 header->bCheckSum = cs;
1681
1682 dbg("%s - downloading firmware", __func__);
1683 for (pos = 0; pos < size; pos += done) {
1684 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1685 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1686 &done, 1000);
1687 if (status)
1688 break;
1689 }
1690 return status;
1691 }
1692
1693 static int ti_download_firmware(struct ti_device *tdev)
1694 {
1695 int status;
1696 int buffer_size;
1697 __u8 *buffer;
1698 struct usb_device *dev = tdev->td_serial->dev;
1699 unsigned int pipe = usb_sndbulkpipe(dev,
1700 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1701 const struct firmware *fw_p;
1702 char buf[32];
1703
1704 /* try ID specific firmware first, then try generic firmware */
1705 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1706 dev->descriptor.idProduct);
1707 if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1708 buf[0] = '\0';
1709 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1710 switch (dev->descriptor.idProduct) {
1711 case MTS_CDMA_PRODUCT_ID:
1712 strcpy(buf, "mts_cdma.fw");
1713 break;
1714 case MTS_GSM_PRODUCT_ID:
1715 strcpy(buf, "mts_gsm.fw");
1716 break;
1717 case MTS_EDGE_PRODUCT_ID:
1718 strcpy(buf, "mts_edge.fw");
1719 break;
1720 }
1721 }
1722 if (buf[0] == '\0') {
1723 if (tdev->td_is_3410)
1724 strcpy(buf, "ti_3410.fw");
1725 else
1726 strcpy(buf, "ti_5052.fw");
1727 }
1728 status = request_firmware(&fw_p, buf, &dev->dev);
1729 }
1730 if (status) {
1731 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1732 return -ENOENT;
1733 }
1734 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1735 dev_err(&dev->dev, "%s - firmware too large\n", __func__);
1736 return -ENOENT;
1737 }
1738
1739 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1740 buffer = kmalloc(buffer_size, GFP_KERNEL);
1741 if (buffer) {
1742 memcpy(buffer, fw_p->data, fw_p->size);
1743 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1744 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1745 kfree(buffer);
1746 } else {
1747 status = -ENOMEM;
1748 }
1749 release_firmware(fw_p);
1750 if (status) {
1751 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1752 __func__, status);
1753 return status;
1754 }
1755
1756 dbg("%s - download successful", __func__);
1757
1758 return 0;
1759 }
1760
1761
1762 /* Circular Buffer Functions */
1763
1764 /*
1765 * ti_buf_alloc
1766 *
1767 * Allocate a circular buffer and all associated memory.
1768 */
1769
1770 static struct circ_buf *ti_buf_alloc(void)
1771 {
1772 struct circ_buf *cb;
1773
1774 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1775 if (cb == NULL)
1776 return NULL;
1777
1778 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1779 if (cb->buf == NULL) {
1780 kfree(cb);
1781 return NULL;
1782 }
1783
1784 ti_buf_clear(cb);
1785
1786 return cb;
1787 }
1788
1789
1790 /*
1791 * ti_buf_free
1792 *
1793 * Free the buffer and all associated memory.
1794 */
1795
1796 static void ti_buf_free(struct circ_buf *cb)
1797 {
1798 kfree(cb->buf);
1799 kfree(cb);
1800 }
1801
1802
1803 /*
1804 * ti_buf_clear
1805 *
1806 * Clear out all data in the circular buffer.
1807 */
1808
1809 static void ti_buf_clear(struct circ_buf *cb)
1810 {
1811 cb->head = cb->tail = 0;
1812 }
1813
1814
1815 /*
1816 * ti_buf_data_avail
1817 *
1818 * Return the number of bytes of data available in the circular
1819 * buffer.
1820 */
1821
1822 static int ti_buf_data_avail(struct circ_buf *cb)
1823 {
1824 return CIRC_CNT(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1825 }
1826
1827
1828 /*
1829 * ti_buf_space_avail
1830 *
1831 * Return the number of bytes of space available in the circular
1832 * buffer.
1833 */
1834
1835 static int ti_buf_space_avail(struct circ_buf *cb)
1836 {
1837 return CIRC_SPACE(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1838 }
1839
1840
1841 /*
1842 * ti_buf_put
1843 *
1844 * Copy data data from a user buffer and put it into the circular buffer.
1845 * Restrict to the amount of space available.
1846 *
1847 * Return the number of bytes copied.
1848 */
1849
1850 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1851 {
1852 int c, ret = 0;
1853
1854 while (1) {
1855 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1856 if (count < c)
1857 c = count;
1858 if (c <= 0)
1859 break;
1860 memcpy(cb->buf + cb->head, buf, c);
1861 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1862 buf += c;
1863 count -= c;
1864 ret += c;
1865 }
1866
1867 return ret;
1868 }
1869
1870
1871 /*
1872 * ti_buf_get
1873 *
1874 * Get data from the circular buffer and copy to the given buffer.
1875 * Restrict to the amount of data available.
1876 *
1877 * Return the number of bytes copied.
1878 */
1879
1880 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1881 {
1882 int c, ret = 0;
1883
1884 while (1) {
1885 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1886 if (count < c)
1887 c = count;
1888 if (c <= 0)
1889 break;
1890 memcpy(buf, cb->buf + cb->tail, c);
1891 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1892 buf += c;
1893 count -= c;
1894 ret += c;
1895 }
1896
1897 return ret;
1898 }
Support for the Chinese Samsung S3C2440 based development boards