?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
USB: TI 3410/5052 USB Serial: convert td_open_close_lock to mutex
[linux-2.6/mini2440.git] / drivers / usb / serial / ti_usb_3410_5052.c
blob995fdf3c489820f7ef635ad7f1dad9591c3d8237
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 * This driver needs this hotplug script in /etc/hotplug/usb/ti_usb_3410_5052
21 * or in /etc/hotplug.d/usb/ti_usb_3410_5052.hotplug to set the device
22 * configuration.
23 *
24 * #!/bin/bash
25 *
26 * BOOT_CONFIG=1
27 * ACTIVE_CONFIG=2
28 *
29 * if [[ "$ACTION" != "add" ]]
30 * then
31 * exit
32 * fi
33 *
34 * CONFIG_PATH=/sys${DEVPATH%/?*}/bConfigurationValue
35 *
36 * if [[ 0`cat $CONFIG_PATH` -ne $BOOT_CONFIG ]]
37 * then
38 * exit
39 * fi
40 *
41 * PRODUCT=${PRODUCT%/?*} # delete version
42 * VENDOR_ID=`printf "%d" 0x${PRODUCT%/?*}`
43 * PRODUCT_ID=`printf "%d" 0x${PRODUCT#*?/}`
44 *
45 * PARAM_PATH=/sys/module/ti_usb_3410_5052/parameters
46 *
47 * function scan() {
48 * s=$1
49 * shift
50 * for i
51 * do
52 * if [[ $s -eq $i ]]
53 * then
54 * return 0
55 * fi
56 * done
57 * return 1
58 * }
59 *
60 * IFS=$IFS,
61 *
62 * if (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_3410` &&
63 * scan $PRODUCT_ID 13328 `cat $PARAM_PATH/product_3410`) ||
64 * (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_5052` &&
65 * scan $PRODUCT_ID 20562 20818 20570 20575 `cat $PARAM_PATH/product_5052`)
66 * then
67 * echo $ACTIVE_CONFIG > $CONFIG_PATH
68 * fi
69 */
70
71 #include <linux/kernel.h>
72 #include <linux/errno.h>
73 #include <linux/init.h>
74 #include <linux/slab.h>
75 #include <linux/tty.h>
76 #include <linux/tty_driver.h>
77 #include <linux/tty_flip.h>
78 #include <linux/module.h>
79 #include <linux/spinlock.h>
80 #include <linux/ioctl.h>
81 #include <linux/serial.h>
82 #include <linux/circ_buf.h>
83 #include <linux/mutex.h>
84 #include <asm/uaccess.h>
85 #include <asm/semaphore.h>
86 #include <linux/usb.h>
87 #include <linux/usb/serial.h>
88
89 #include "ti_usb_3410_5052.h"
90 #include "ti_fw_3410.h" /* firmware image for 3410 */
91 #include "ti_fw_5052.h" /* firmware image for 5052 */
92
93
94 /* Defines */
95
96 #define TI_DRIVER_VERSION "v0.9"
97 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
98 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
99
100 #define TI_FIRMWARE_BUF_SIZE 16284
101
102 #define TI_WRITE_BUF_SIZE 1024
103
104 #define TI_TRANSFER_TIMEOUT 2
105
106 #define TI_DEFAULT_LOW_LATENCY 0
107 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
108
109 /* supported setserial flags */
110 #define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY)
111
112 /* read urb states */
113 #define TI_READ_URB_RUNNING 0
114 #define TI_READ_URB_STOPPING 1
115 #define TI_READ_URB_STOPPED 2
116
117 #define TI_EXTRA_VID_PID_COUNT 5
118
119
120 /* Structures */
121
122 struct ti_port {
123 int tp_is_open;
124 __u8 tp_msr;
125 __u8 tp_lsr;
126 __u8 tp_shadow_mcr;
127 __u8 tp_uart_mode; /* 232 or 485 modes */
128 unsigned int tp_uart_base_addr;
129 int tp_flags;
130 int tp_closing_wait;/* in .01 secs */
131 struct async_icount tp_icount;
132 wait_queue_head_t tp_msr_wait; /* wait for msr change */
133 wait_queue_head_t tp_write_wait;
134 struct ti_device *tp_tdev;
135 struct usb_serial_port *tp_port;
136 spinlock_t tp_lock;
137 int tp_read_urb_state;
138 int tp_write_urb_in_use;
139 struct circ_buf *tp_write_buf;
140 };
141
142 struct ti_device {
143 struct mutex td_open_close_lock;
144 int td_open_port_count;
145 struct usb_serial *td_serial;
146 int td_is_3410;
147 int td_urb_error;
148 };
149
150
151 /* Function Declarations */
152
153 static int ti_startup(struct usb_serial *serial);
154 static void ti_shutdown(struct usb_serial *serial);
155 static int ti_open(struct usb_serial_port *port, struct file *file);
156 static void ti_close(struct usb_serial_port *port, struct file *file);
157 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
158 int count);
159 static int ti_write_room(struct usb_serial_port *port);
160 static int ti_chars_in_buffer(struct usb_serial_port *port);
161 static void ti_throttle(struct usb_serial_port *port);
162 static void ti_unthrottle(struct usb_serial_port *port);
163 static int ti_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
164 static void ti_set_termios(struct usb_serial_port *port,
165 struct ktermios *old_termios);
166 static int ti_tiocmget(struct usb_serial_port *port, struct file *file);
167 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
168 unsigned int set, unsigned int clear);
169 static void ti_break(struct usb_serial_port *port, int break_state);
170 static void ti_interrupt_callback(struct urb *urb);
171 static void ti_bulk_in_callback(struct urb *urb);
172 static void ti_bulk_out_callback(struct urb *urb);
173
174 static void ti_recv(struct device *dev, struct tty_struct *tty,
175 unsigned char *data, int length);
176 static void ti_send(struct ti_port *tport);
177 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
178 static int ti_get_lsr(struct ti_port *tport);
179 static int ti_get_serial_info(struct ti_port *tport,
180 struct serial_struct __user *ret_arg);
181 static int ti_set_serial_info(struct ti_port *tport,
182 struct serial_struct __user *new_arg);
183 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
184
185 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
186
187 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
188 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
189
190 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
191 __u16 moduleid, __u16 value, __u8 *data, int size);
192 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
193 __u16 moduleid, __u16 value, __u8 *data, int size);
194
195 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
196 __u8 mask, __u8 byte);
197
198 static int ti_download_firmware(struct ti_device *tdev,
199 unsigned char *firmware, unsigned int firmware_size);
200
201 /* circular buffer */
202 static struct circ_buf *ti_buf_alloc(void);
203 static void ti_buf_free(struct circ_buf *cb);
204 static void ti_buf_clear(struct circ_buf *cb);
205 static int ti_buf_data_avail(struct circ_buf *cb);
206 static int ti_buf_space_avail(struct circ_buf *cb);
207 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
208 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
209
210
211 /* Data */
212
213 /* module parameters */
214 static int debug;
215 static int low_latency = TI_DEFAULT_LOW_LATENCY;
216 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
217 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
218 static unsigned int vendor_3410_count;
219 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
220 static unsigned int product_3410_count;
221 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
222 static unsigned int vendor_5052_count;
223 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
224 static unsigned int product_5052_count;
225
226 /* supported devices */
227 /* the array dimension is the number of default entries plus */
228 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
229 /* null entry */
230 static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = {
231 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
232 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
233 };
234
235 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
236 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
237 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
238 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
239 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
240 };
241
242 static struct usb_device_id ti_id_table_combined[] = {
243 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
244 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
245 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
246 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
247 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
248 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
249 { }
250 };
251
252 static struct usb_driver ti_usb_driver = {
253 .name = "ti_usb_3410_5052",
254 .probe = usb_serial_probe,
255 .disconnect = usb_serial_disconnect,
256 .id_table = ti_id_table_combined,
257 .no_dynamic_id = 1,
258 };
259
260 static struct usb_serial_driver ti_1port_device = {
261 .driver = {
262 .owner = THIS_MODULE,
263 .name = "ti_usb_3410_5052_1",
264 },
265 .description = "TI USB 3410 1 port adapter",
266 .usb_driver = &ti_usb_driver,
267 .id_table = ti_id_table_3410,
268 .num_interrupt_in = 1,
269 .num_bulk_in = 1,
270 .num_bulk_out = 1,
271 .num_ports = 1,
272 .attach = ti_startup,
273 .shutdown = ti_shutdown,
274 .open = ti_open,
275 .close = ti_close,
276 .write = ti_write,
277 .write_room = ti_write_room,
278 .chars_in_buffer = ti_chars_in_buffer,
279 .throttle = ti_throttle,
280 .unthrottle = ti_unthrottle,
281 .ioctl = ti_ioctl,
282 .set_termios = ti_set_termios,
283 .tiocmget = ti_tiocmget,
284 .tiocmset = ti_tiocmset,
285 .break_ctl = ti_break,
286 .read_int_callback = ti_interrupt_callback,
287 .read_bulk_callback = ti_bulk_in_callback,
288 .write_bulk_callback = ti_bulk_out_callback,
289 };
290
291 static struct usb_serial_driver ti_2port_device = {
292 .driver = {
293 .owner = THIS_MODULE,
294 .name = "ti_usb_3410_5052_2",
295 },
296 .description = "TI USB 5052 2 port adapter",
297 .usb_driver = &ti_usb_driver,
298 .id_table = ti_id_table_5052,
299 .num_interrupt_in = 1,
300 .num_bulk_in = 2,
301 .num_bulk_out = 2,
302 .num_ports = 2,
303 .attach = ti_startup,
304 .shutdown = ti_shutdown,
305 .open = ti_open,
306 .close = ti_close,
307 .write = ti_write,
308 .write_room = ti_write_room,
309 .chars_in_buffer = ti_chars_in_buffer,
310 .throttle = ti_throttle,
311 .unthrottle = ti_unthrottle,
312 .ioctl = ti_ioctl,
313 .set_termios = ti_set_termios,
314 .tiocmget = ti_tiocmget,
315 .tiocmset = ti_tiocmset,
316 .break_ctl = ti_break,
317 .read_int_callback = ti_interrupt_callback,
318 .read_bulk_callback = ti_bulk_in_callback,
319 .write_bulk_callback = ti_bulk_out_callback,
320 };
321
322
323 /* Module */
324
325 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
326 MODULE_DESCRIPTION(TI_DRIVER_DESC);
327 MODULE_VERSION(TI_DRIVER_VERSION);
328 MODULE_LICENSE("GPL");
329
330 module_param(debug, bool, S_IRUGO | S_IWUSR);
331 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
332
333 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
334 MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off");
335
336 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
337 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain in close, in .01 secs, default is 4000");
338
339 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
340 MODULE_PARM_DESC(vendor_3410, "Vendor ids for 3410 based devices, 1-5 short integers");
341 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
342 MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers");
343 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
344 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers");
345 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
346 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers");
347
348 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
349
350
351 /* Functions */
352
353 static int __init ti_init(void)
354 {
355 int i,j;
356 int ret;
357
358 /* insert extra vendor and product ids */
359 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
360 for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) {
361 ti_id_table_3410[j].idVendor = vendor_3410[i];
362 ti_id_table_3410[j].idProduct = product_3410[i];
363 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
364 }
365 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
366 for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) {
367 ti_id_table_5052[j].idVendor = vendor_5052[i];
368 ti_id_table_5052[j].idProduct = product_5052[i];
369 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
370 }
371
372 ret = usb_serial_register(&ti_1port_device);
373 if (ret)
374 goto failed_1port;
375 ret = usb_serial_register(&ti_2port_device);
376 if (ret)
377 goto failed_2port;
378
379 ret = usb_register(&ti_usb_driver);
380 if (ret)
381 goto failed_usb;
382
383 info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
384
385 return 0;
386
387 failed_usb:
388 usb_serial_deregister(&ti_2port_device);
389 failed_2port:
390 usb_serial_deregister(&ti_1port_device);
391 failed_1port:
392 return ret;
393 }
394
395
396 static void __exit ti_exit(void)
397 {
398 usb_serial_deregister(&ti_1port_device);
399 usb_serial_deregister(&ti_2port_device);
400 usb_deregister(&ti_usb_driver);
401 }
402
403
404 module_init(ti_init);
405 module_exit(ti_exit);
406
407
408 static int ti_startup(struct usb_serial *serial)
409 {
410 struct ti_device *tdev;
411 struct ti_port *tport;
412 struct usb_device *dev = serial->dev;
413 int status;
414 int i;
415
416
417 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
418 __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct),
419 dev->descriptor.bNumConfigurations,
420 dev->actconfig->desc.bConfigurationValue);
421
422 /* create device structure */
423 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
424 if (tdev == NULL) {
425 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
426 return -ENOMEM;
427 }
428 mutex_init(&tdev->td_open_close_lock);
429 tdev->td_serial = serial;
430 usb_set_serial_data(serial, tdev);
431
432 /* determine device type */
433 if (usb_match_id(serial->interface, ti_id_table_3410))
434 tdev->td_is_3410 = 1;
435 dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052");
436
437 /* if we have only 1 configuration, download firmware */
438 if (dev->descriptor.bNumConfigurations == 1) {
439
440 if (tdev->td_is_3410)
441 status = ti_download_firmware(tdev, ti_fw_3410,
442 sizeof(ti_fw_3410));
443 else
444 status = ti_download_firmware(tdev, ti_fw_5052,
445 sizeof(ti_fw_5052));
446 if (status)
447 goto free_tdev;
448
449 /* 3410 must be reset, 5052 resets itself */
450 if (tdev->td_is_3410) {
451 msleep_interruptible(100);
452 usb_reset_device(dev);
453 }
454
455 status = -ENODEV;
456 goto free_tdev;
457 }
458
459 /* the second configuration must be set (in sysfs by hotplug script) */
460 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
461 status = -ENODEV;
462 goto free_tdev;
463 }
464
465 /* set up port structures */
466 for (i = 0; i < serial->num_ports; ++i) {
467 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
468 if (tport == NULL) {
469 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
470 status = -ENOMEM;
471 goto free_tports;
472 }
473 spin_lock_init(&tport->tp_lock);
474 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
475 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
476 tport->tp_closing_wait = closing_wait;
477 init_waitqueue_head(&tport->tp_msr_wait);
478 init_waitqueue_head(&tport->tp_write_wait);
479 tport->tp_write_buf = ti_buf_alloc();
480 if (tport->tp_write_buf == NULL) {
481 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
482 kfree(tport);
483 status = -ENOMEM;
484 goto free_tports;
485 }
486 tport->tp_port = serial->port[i];
487 tport->tp_tdev = tdev;
488 usb_set_serial_port_data(serial->port[i], tport);
489 tport->tp_uart_mode = 0; /* default is RS232 */
490 }
491
492 return 0;
493
494 free_tports:
495 for (--i; i>=0; --i) {
496 tport = usb_get_serial_port_data(serial->port[i]);
497 ti_buf_free(tport->tp_write_buf);
498 kfree(tport);
499 usb_set_serial_port_data(serial->port[i], NULL);
500 }
501 free_tdev:
502 kfree(tdev);
503 usb_set_serial_data(serial, NULL);
504 return status;
505 }
506
507
508 static void ti_shutdown(struct usb_serial *serial)
509 {
510 int i;
511 struct ti_device *tdev = usb_get_serial_data(serial);
512 struct ti_port *tport;
513
514 dbg("%s", __FUNCTION__);
515
516 for (i=0; i < serial->num_ports; ++i) {
517 tport = usb_get_serial_port_data(serial->port[i]);
518 if (tport) {
519 ti_buf_free(tport->tp_write_buf);
520 kfree(tport);
521 usb_set_serial_port_data(serial->port[i], NULL);
522 }
523 }
524
525 kfree(tdev);
526 usb_set_serial_data(serial, NULL);
527 }
528
529
530 static int ti_open(struct usb_serial_port *port, struct file *file)
531 {
532 struct ti_port *tport = usb_get_serial_port_data(port);
533 struct ti_device *tdev;
534 struct usb_device *dev;
535 struct urb *urb;
536 int port_number;
537 int status;
538 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
539 TI_PIPE_TIMEOUT_ENABLE |
540 (TI_TRANSFER_TIMEOUT << 2));
541
542 dbg("%s - port %d", __FUNCTION__, port->number);
543
544 if (tport == NULL)
545 return -ENODEV;
546
547 dev = port->serial->dev;
548 tdev = tport->tp_tdev;
549
550 /* only one open on any port on a device at a time */
551 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
552 return -ERESTARTSYS;
553
554 if (port->tty)
555 port->tty->low_latency =
556 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
557
558 port_number = port->number - port->serial->minor;
559
560 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
561
562 tport->tp_msr = 0;
563 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
564
565 /* start interrupt urb the first time a port is opened on this device */
566 if (tdev->td_open_port_count == 0) {
567 dbg("%s - start interrupt in urb", __FUNCTION__);
568 urb = tdev->td_serial->port[0]->interrupt_in_urb;
569 if (!urb) {
570 dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__);
571 status = -EINVAL;
572 goto release_lock;
573 }
574 urb->complete = ti_interrupt_callback;
575 urb->context = tdev;
576 urb->dev = dev;
577 status = usb_submit_urb(urb, GFP_KERNEL);
578 if (status) {
579 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status);
580 goto release_lock;
581 }
582 }
583
584 ti_set_termios(port, NULL);
585
586 dbg("%s - sending TI_OPEN_PORT", __FUNCTION__);
587 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
588 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
589 if (status) {
590 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status);
591 goto unlink_int_urb;
592 }
593
594 dbg("%s - sending TI_START_PORT", __FUNCTION__);
595 status = ti_command_out_sync(tdev, TI_START_PORT,
596 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
597 if (status) {
598 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status);
599 goto unlink_int_urb;
600 }
601
602 dbg("%s - sending TI_PURGE_PORT", __FUNCTION__);
603 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
604 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
605 if (status) {
606 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status);
607 goto unlink_int_urb;
608 }
609 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
610 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
611 if (status) {
612 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status);
613 goto unlink_int_urb;
614 }
615
616 /* reset the data toggle on the bulk endpoints to work around bug in
617 * host controllers where things get out of sync some times */
618 usb_clear_halt(dev, port->write_urb->pipe);
619 usb_clear_halt(dev, port->read_urb->pipe);
620
621 ti_set_termios(port, NULL);
622
623 dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__);
624 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
625 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
626 if (status) {
627 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status);
628 goto unlink_int_urb;
629 }
630
631 dbg("%s - sending TI_START_PORT (2)", __FUNCTION__);
632 status = ti_command_out_sync(tdev, TI_START_PORT,
633 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
634 if (status) {
635 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status);
636 goto unlink_int_urb;
637 }
638
639 /* start read urb */
640 dbg("%s - start read urb", __FUNCTION__);
641 urb = port->read_urb;
642 if (!urb) {
643 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__);
644 status = -EINVAL;
645 goto unlink_int_urb;
646 }
647 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
648 urb->complete = ti_bulk_in_callback;
649 urb->context = tport;
650 urb->dev = dev;
651 status = usb_submit_urb(urb, GFP_KERNEL);
652 if (status) {
653 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status);
654 goto unlink_int_urb;
655 }
656
657 tport->tp_is_open = 1;
658 ++tdev->td_open_port_count;
659
660 goto release_lock;
661
662 unlink_int_urb:
663 if (tdev->td_open_port_count == 0)
664 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
665 release_lock:
666 mutex_unlock(&tdev->td_open_close_lock);
667 dbg("%s - exit %d", __FUNCTION__, status);
668 return status;
669 }
670
671
672 static void ti_close(struct usb_serial_port *port, struct file *file)
673 {
674 struct ti_device *tdev;
675 struct ti_port *tport;
676 int port_number;
677 int status;
678 int do_unlock;
679
680 dbg("%s - port %d", __FUNCTION__, port->number);
681
682 tdev = usb_get_serial_data(port->serial);
683 tport = usb_get_serial_port_data(port);
684 if (tdev == NULL || tport == NULL)
685 return;
686
687 tport->tp_is_open = 0;
688
689 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
690
691 usb_kill_urb(port->read_urb);
692 usb_kill_urb(port->write_urb);
693 tport->tp_write_urb_in_use = 0;
694
695 port_number = port->number - port->serial->minor;
696
697 dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__);
698 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
699 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
700 if (status)
701 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status);
702
703 /* if mutex_lock is interrupted, continue anyway */
704 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
705 --tport->tp_tdev->td_open_port_count;
706 if (tport->tp_tdev->td_open_port_count <= 0) {
707 /* last port is closed, shut down interrupt urb */
708 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
709 tport->tp_tdev->td_open_port_count = 0;
710 }
711 if (do_unlock)
712 mutex_unlock(&tdev->td_open_close_lock);
713
714 dbg("%s - exit", __FUNCTION__);
715 }
716
717
718 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
719 int count)
720 {
721 struct ti_port *tport = usb_get_serial_port_data(port);
722 unsigned long flags;
723
724 dbg("%s - port %d", __FUNCTION__, port->number);
725
726 if (count == 0) {
727 dbg("%s - write request of 0 bytes", __FUNCTION__);
728 return 0;
729 }
730
731 if (tport == NULL || !tport->tp_is_open)
732 return -ENODEV;
733
734 spin_lock_irqsave(&tport->tp_lock, flags);
735 count = ti_buf_put(tport->tp_write_buf, data, count);
736 spin_unlock_irqrestore(&tport->tp_lock, flags);
737
738 ti_send(tport);
739
740 return count;
741 }
742
743
744 static int ti_write_room(struct usb_serial_port *port)
745 {
746 struct ti_port *tport = usb_get_serial_port_data(port);
747 int room = 0;
748 unsigned long flags;
749
750 dbg("%s - port %d", __FUNCTION__, port->number);
751
752 if (tport == NULL)
753 return -ENODEV;
754
755 spin_lock_irqsave(&tport->tp_lock, flags);
756 room = ti_buf_space_avail(tport->tp_write_buf);
757 spin_unlock_irqrestore(&tport->tp_lock, flags);
758
759 dbg("%s - returns %d", __FUNCTION__, room);
760 return room;
761 }
762
763
764 static int ti_chars_in_buffer(struct usb_serial_port *port)
765 {
766 struct ti_port *tport = usb_get_serial_port_data(port);
767 int chars = 0;
768 unsigned long flags;
769
770 dbg("%s - port %d", __FUNCTION__, port->number);
771
772 if (tport == NULL)
773 return -ENODEV;
774
775 spin_lock_irqsave(&tport->tp_lock, flags);
776 chars = ti_buf_data_avail(tport->tp_write_buf);
777 spin_unlock_irqrestore(&tport->tp_lock, flags);
778
779 dbg("%s - returns %d", __FUNCTION__, chars);
780 return chars;
781 }
782
783
784 static void ti_throttle(struct usb_serial_port *port)
785 {
786 struct ti_port *tport = usb_get_serial_port_data(port);
787 struct tty_struct *tty;
788
789 dbg("%s - port %d", __FUNCTION__, port->number);
790
791 if (tport == NULL)
792 return;
793
794 tty = port->tty;
795 if (!tty) {
796 dbg("%s - no tty", __FUNCTION__);
797 return;
798 }
799
800 if (I_IXOFF(tty) || C_CRTSCTS(tty))
801 ti_stop_read(tport, tty);
802
803 }
804
805
806 static void ti_unthrottle(struct usb_serial_port *port)
807 {
808 struct ti_port *tport = usb_get_serial_port_data(port);
809 struct tty_struct *tty;
810 int status;
811
812 dbg("%s - port %d", __FUNCTION__, port->number);
813
814 if (tport == NULL)
815 return;
816
817 tty = port->tty;
818 if (!tty) {
819 dbg("%s - no tty", __FUNCTION__);
820 return;
821 }
822
823 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
824 status = ti_restart_read(tport, tty);
825 if (status)
826 dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status);
827 }
828 }
829
830
831 static int ti_ioctl(struct usb_serial_port *port, struct file *file,
832 unsigned int cmd, unsigned long arg)
833 {
834 struct ti_port *tport = usb_get_serial_port_data(port);
835 struct async_icount cnow;
836 struct async_icount cprev;
837
838 dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd);
839
840 if (tport == NULL)
841 return -ENODEV;
842
843 switch (cmd) {
844 case TIOCGSERIAL:
845 dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
846 return ti_get_serial_info(tport, (struct serial_struct __user *)arg);
847 break;
848
849 case TIOCSSERIAL:
850 dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
851 return ti_set_serial_info(tport, (struct serial_struct __user *)arg);
852 break;
853
854 case TIOCMIWAIT:
855 dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
856 cprev = tport->tp_icount;
857 while (1) {
858 interruptible_sleep_on(&tport->tp_msr_wait);
859 if (signal_pending(current))
860 return -ERESTARTSYS;
861 cnow = tport->tp_icount;
862 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
863 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
864 return -EIO; /* no change => error */
865 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
866 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
867 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
868 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
869 return 0;
870 }
871 cprev = cnow;
872 }
873 break;
874
875 case TIOCGICOUNT:
876 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx);
877 if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount)))
878 return -EFAULT;
879 return 0;
880 }
881
882 return -ENOIOCTLCMD;
883 }
884
885
886 static void ti_set_termios(struct usb_serial_port *port,
887 struct ktermios *old_termios)
888 {
889 struct ti_port *tport = usb_get_serial_port_data(port);
890 struct tty_struct *tty = port->tty;
891 struct ti_uart_config *config;
892 tcflag_t cflag,iflag;
893 int baud;
894 int status;
895 int port_number = port->number - port->serial->minor;
896 unsigned int mcr;
897
898 dbg("%s - port %d", __FUNCTION__, port->number);
899
900 if (!tty || !tty->termios) {
901 dbg("%s - no tty or termios", __FUNCTION__);
902 return;
903 }
904
905 cflag = tty->termios->c_cflag;
906 iflag = tty->termios->c_iflag;
907
908 if (old_termios && cflag == old_termios->c_cflag
909 && iflag == old_termios->c_iflag) {
910 dbg("%s - nothing to change", __FUNCTION__);
911 return;
912 }
913
914 dbg("%s - clfag %08x, iflag %08x", __FUNCTION__, cflag, iflag);
915
916 if (old_termios)
917 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag);
918
919 if (tport == NULL)
920 return;
921
922 config = kmalloc(sizeof(*config), GFP_KERNEL);
923 if (!config) {
924 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
925 return;
926 }
927
928 config->wFlags = 0;
929
930 /* these flags must be set */
931 config->wFlags |= TI_UART_ENABLE_MS_INTS;
932 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
933 config->bUartMode = (__u8)(tport->tp_uart_mode);
934
935 switch (cflag & CSIZE) {
936 case CS5:
937 config->bDataBits = TI_UART_5_DATA_BITS;
938 break;
939 case CS6:
940 config->bDataBits = TI_UART_6_DATA_BITS;
941 break;
942 case CS7:
943 config->bDataBits = TI_UART_7_DATA_BITS;
944 break;
945 default:
946 case CS8:
947 config->bDataBits = TI_UART_8_DATA_BITS;
948 break;
949 }
950
951 if (cflag & PARENB) {
952 if (cflag & PARODD) {
953 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
954 config->bParity = TI_UART_ODD_PARITY;
955 } else {
956 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
957 config->bParity = TI_UART_EVEN_PARITY;
958 }
959 } else {
960 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
961 config->bParity = TI_UART_NO_PARITY;
962 }
963
964 if (cflag & CSTOPB)
965 config->bStopBits = TI_UART_2_STOP_BITS;
966 else
967 config->bStopBits = TI_UART_1_STOP_BITS;
968
969 if (cflag & CRTSCTS) {
970 /* RTS flow control must be off to drop RTS for baud rate B0 */
971 if ((cflag & CBAUD) != B0)
972 config->wFlags |= TI_UART_ENABLE_RTS_IN;
973 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
974 } else {
975 tty->hw_stopped = 0;
976 ti_restart_read(tport, tty);
977 }
978
979 if (I_IXOFF(tty) || I_IXON(tty)) {
980 config->cXon = START_CHAR(tty);
981 config->cXoff = STOP_CHAR(tty);
982
983 if (I_IXOFF(tty))
984 config->wFlags |= TI_UART_ENABLE_X_IN;
985 else
986 ti_restart_read(tport, tty);
987
988 if (I_IXON(tty))
989 config->wFlags |= TI_UART_ENABLE_X_OUT;
990 }
991
992 baud = tty_get_baud_rate(tty);
993 if (!baud) baud = 9600;
994 if (tport->tp_tdev->td_is_3410)
995 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
996 else
997 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
998
999 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
1000 __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
1001
1002 cpu_to_be16s(&config->wBaudRate);
1003 cpu_to_be16s(&config->wFlags);
1004
1005 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1006 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1007 sizeof(*config));
1008 if (status)
1009 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status);
1010
1011 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1012 mcr = tport->tp_shadow_mcr;
1013 /* if baud rate is B0, clear RTS and DTR */
1014 if ((cflag & CBAUD) == B0)
1015 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1016 status = ti_set_mcr(tport, mcr);
1017 if (status)
1018 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status);
1019
1020 kfree(config);
1021 }
1022
1023
1024 static int ti_tiocmget(struct usb_serial_port *port, struct file *file)
1025 {
1026 struct ti_port *tport = usb_get_serial_port_data(port);
1027 unsigned int result;
1028 unsigned int msr;
1029 unsigned int mcr;
1030
1031 dbg("%s - port %d", __FUNCTION__, port->number);
1032
1033 if (tport == NULL)
1034 return -ENODEV;
1035
1036 msr = tport->tp_msr;
1037 mcr = tport->tp_shadow_mcr;
1038
1039 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1040 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1041 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1042 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1043 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1044 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1045 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1046
1047 dbg("%s - 0x%04X", __FUNCTION__, result);
1048
1049 return result;
1050 }
1051
1052
1053 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
1054 unsigned int set, unsigned int clear)
1055 {
1056 struct ti_port *tport = usb_get_serial_port_data(port);
1057 unsigned int mcr;
1058
1059 dbg("%s - port %d", __FUNCTION__, port->number);
1060
1061 if (tport == NULL)
1062 return -ENODEV;
1063
1064 mcr = tport->tp_shadow_mcr;
1065
1066 if (set & TIOCM_RTS)
1067 mcr |= TI_MCR_RTS;
1068 if (set & TIOCM_DTR)
1069 mcr |= TI_MCR_DTR;
1070 if (set & TIOCM_LOOP)
1071 mcr |= TI_MCR_LOOP;
1072
1073 if (clear & TIOCM_RTS)
1074 mcr &= ~TI_MCR_RTS;
1075 if (clear & TIOCM_DTR)
1076 mcr &= ~TI_MCR_DTR;
1077 if (clear & TIOCM_LOOP)
1078 mcr &= ~TI_MCR_LOOP;
1079
1080 return ti_set_mcr(tport, mcr);
1081 }
1082
1083
1084 static void ti_break(struct usb_serial_port *port, int break_state)
1085 {
1086 struct ti_port *tport = usb_get_serial_port_data(port);
1087 int status;
1088
1089 dbg("%s - state = %d", __FUNCTION__, break_state);
1090
1091 if (tport == NULL)
1092 return;
1093
1094 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1095
1096 status = ti_write_byte(tport->tp_tdev,
1097 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1098 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1099
1100 if (status)
1101 dbg("%s - error setting break, %d", __FUNCTION__, status);
1102 }
1103
1104
1105 static void ti_interrupt_callback(struct urb *urb)
1106 {
1107 struct ti_device *tdev = (struct ti_device *)urb->context;
1108 struct usb_serial_port *port;
1109 struct usb_serial *serial = tdev->td_serial;
1110 struct ti_port *tport;
1111 struct device *dev = &urb->dev->dev;
1112 unsigned char *data = urb->transfer_buffer;
1113 int length = urb->actual_length;
1114 int port_number;
1115 int function;
1116 int status = urb->status;
1117 int retval;
1118 __u8 msr;
1119
1120 dbg("%s", __FUNCTION__);
1121
1122 switch (status) {
1123 case 0:
1124 break;
1125 case -ECONNRESET:
1126 case -ENOENT:
1127 case -ESHUTDOWN:
1128 dbg("%s - urb shutting down, %d", __FUNCTION__, status);
1129 tdev->td_urb_error = 1;
1130 return;
1131 default:
1132 dev_err(dev, "%s - nonzero urb status, %d\n",
1133 __FUNCTION__, status);
1134 tdev->td_urb_error = 1;
1135 goto exit;
1136 }
1137
1138 if (length != 2) {
1139 dbg("%s - bad packet size, %d", __FUNCTION__, length);
1140 goto exit;
1141 }
1142
1143 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1144 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]);
1145 goto exit;
1146 }
1147
1148 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1149 function = TI_GET_FUNC_FROM_CODE(data[0]);
1150
1151 dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]);
1152
1153 if (port_number >= serial->num_ports) {
1154 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number);
1155 goto exit;
1156 }
1157
1158 port = serial->port[port_number];
1159
1160 tport = usb_get_serial_port_data(port);
1161 if (!tport)
1162 goto exit;
1163
1164 switch (function) {
1165 case TI_CODE_DATA_ERROR:
1166 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]);
1167 break;
1168
1169 case TI_CODE_MODEM_STATUS:
1170 msr = data[1];
1171 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr);
1172 ti_handle_new_msr(tport, msr);
1173 break;
1174
1175 default:
1176 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]);
1177 break;
1178 }
1179
1180 exit:
1181 retval = usb_submit_urb(urb, GFP_ATOMIC);
1182 if (retval)
1183 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1184 __FUNCTION__, retval);
1185 }
1186
1187
1188 static void ti_bulk_in_callback(struct urb *urb)
1189 {
1190 struct ti_port *tport = (struct ti_port *)urb->context;
1191 struct usb_serial_port *port = tport->tp_port;
1192 struct device *dev = &urb->dev->dev;
1193 int status = urb->status;
1194 int retval = 0;
1195
1196 dbg("%s", __FUNCTION__);
1197
1198 switch (status) {
1199 case 0:
1200 break;
1201 case -ECONNRESET:
1202 case -ENOENT:
1203 case -ESHUTDOWN:
1204 dbg("%s - urb shutting down, %d", __FUNCTION__, status);
1205 tport->tp_tdev->td_urb_error = 1;
1206 wake_up_interruptible(&tport->tp_write_wait);
1207 return;
1208 default:
1209 dev_err(dev, "%s - nonzero urb status, %d\n",
1210 __FUNCTION__, status );
1211 tport->tp_tdev->td_urb_error = 1;
1212 wake_up_interruptible(&tport->tp_write_wait);
1213 }
1214
1215 if (status == -EPIPE)
1216 goto exit;
1217
1218 if (status) {
1219 dev_err(dev, "%s - stopping read!\n", __FUNCTION__);
1220 return;
1221 }
1222
1223 if (port->tty && urb->actual_length) {
1224 usb_serial_debug_data(debug, dev, __FUNCTION__,
1225 urb->actual_length, urb->transfer_buffer);
1226
1227 if (!tport->tp_is_open)
1228 dbg("%s - port closed, dropping data", __FUNCTION__);
1229 else
1230 ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer,
1231 urb->actual_length);
1232
1233 spin_lock(&tport->tp_lock);
1234 tport->tp_icount.rx += urb->actual_length;
1235 spin_unlock(&tport->tp_lock);
1236 }
1237
1238 exit:
1239 /* continue to read unless stopping */
1240 spin_lock(&tport->tp_lock);
1241 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1242 urb->dev = port->serial->dev;
1243 retval = usb_submit_urb(urb, GFP_ATOMIC);
1244 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1245 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1246 }
1247 spin_unlock(&tport->tp_lock);
1248 if (retval)
1249 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1250 __FUNCTION__, retval);
1251 }
1252
1253
1254 static void ti_bulk_out_callback(struct urb *urb)
1255 {
1256 struct ti_port *tport = (struct ti_port *)urb->context;
1257 struct usb_serial_port *port = tport->tp_port;
1258 struct device *dev = &urb->dev->dev;
1259 int status = urb->status;
1260
1261 dbg("%s - port %d", __FUNCTION__, port->number);
1262
1263 tport->tp_write_urb_in_use = 0;
1264
1265 switch (status) {
1266 case 0:
1267 break;
1268 case -ECONNRESET:
1269 case -ENOENT:
1270 case -ESHUTDOWN:
1271 dbg("%s - urb shutting down, %d", __FUNCTION__, status);
1272 tport->tp_tdev->td_urb_error = 1;
1273 wake_up_interruptible(&tport->tp_write_wait);
1274 return;
1275 default:
1276 dev_err(dev, "%s - nonzero urb status, %d\n",
1277 __FUNCTION__, status);
1278 tport->tp_tdev->td_urb_error = 1;
1279 wake_up_interruptible(&tport->tp_write_wait);
1280 }
1281
1282 /* send any buffered data */
1283 ti_send(tport);
1284 }
1285
1286
1287 static void ti_recv(struct device *dev, struct tty_struct *tty,
1288 unsigned char *data, int length)
1289 {
1290 int cnt;
1291
1292 do {
1293 cnt = tty_buffer_request_room(tty, length);
1294 if (cnt < length) {
1295 dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length - cnt);
1296 if(cnt == 0)
1297 break;
1298 }
1299 tty_insert_flip_string(tty, data, cnt);
1300 tty_flip_buffer_push(tty);
1301 data += cnt;
1302 length -= cnt;
1303 } while (length > 0);
1304
1305 }
1306
1307
1308 static void ti_send(struct ti_port *tport)
1309 {
1310 int count, result;
1311 struct usb_serial_port *port = tport->tp_port;
1312 struct tty_struct *tty = port->tty;
1313 unsigned long flags;
1314
1315
1316 dbg("%s - port %d", __FUNCTION__, port->number);
1317
1318 spin_lock_irqsave(&tport->tp_lock, flags);
1319
1320 if (tport->tp_write_urb_in_use) {
1321 spin_unlock_irqrestore(&tport->tp_lock, flags);
1322 return;
1323 }
1324
1325 count = ti_buf_get(tport->tp_write_buf,
1326 port->write_urb->transfer_buffer,
1327 port->bulk_out_size);
1328
1329 if (count == 0) {
1330 spin_unlock_irqrestore(&tport->tp_lock, flags);
1331 return;
1332 }
1333
1334 tport->tp_write_urb_in_use = 1;
1335
1336 spin_unlock_irqrestore(&tport->tp_lock, flags);
1337
1338 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
1339
1340 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1341 usb_sndbulkpipe(port->serial->dev,
1342 port->bulk_out_endpointAddress),
1343 port->write_urb->transfer_buffer, count,
1344 ti_bulk_out_callback, tport);
1345
1346 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1347 if (result) {
1348 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result);
1349 tport->tp_write_urb_in_use = 0;
1350 /* TODO: reschedule ti_send */
1351 } else {
1352 spin_lock_irqsave(&tport->tp_lock, flags);
1353 tport->tp_icount.tx += count;
1354 spin_unlock_irqrestore(&tport->tp_lock, flags);
1355 }
1356
1357 /* more room in the buffer for new writes, wakeup */
1358 if (tty)
1359 tty_wakeup(tty);
1360 wake_up_interruptible(&tport->tp_write_wait);
1361 }
1362
1363
1364 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1365 {
1366 int status;
1367
1368 status = ti_write_byte(tport->tp_tdev,
1369 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1370 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1371
1372 if (!status)
1373 tport->tp_shadow_mcr = mcr;
1374
1375 return status;
1376 }
1377
1378
1379 static int ti_get_lsr(struct ti_port *tport)
1380 {
1381 int size,status;
1382 struct ti_device *tdev = tport->tp_tdev;
1383 struct usb_serial_port *port = tport->tp_port;
1384 int port_number = port->number - port->serial->minor;
1385 struct ti_port_status *data;
1386
1387 dbg("%s - port %d", __FUNCTION__, port->number);
1388
1389 size = sizeof(struct ti_port_status);
1390 data = kmalloc(size, GFP_KERNEL);
1391 if (!data) {
1392 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
1393 return -ENOMEM;
1394 }
1395
1396 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1397 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1398 if (status) {
1399 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status);
1400 goto free_data;
1401 }
1402
1403 dbg("%s - lsr 0x%02X", __FUNCTION__, 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 ti_port *tport,
1440 struct serial_struct __user *new_arg)
1441 {
1442 struct usb_serial_port *port = tport->tp_port;
1443 struct serial_struct new_serial;
1444
1445 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1446 return -EFAULT;
1447
1448 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1449 if (port->tty)
1450 port->tty->low_latency =
1451 (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", __FUNCTION__, 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 = tport->tp_port->tty;
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 }
1494
1495
1496 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1497 {
1498 struct ti_device *tdev = tport->tp_tdev;
1499 struct usb_serial_port *port = tport->tp_port;
1500 wait_queue_t wait;
1501 unsigned long flags;
1502
1503 dbg("%s - port %d", __FUNCTION__, port->number);
1504
1505 spin_lock_irqsave(&tport->tp_lock, flags);
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 || !usb_get_intfdata(port->serial->interface)) /* disconnect */
1517 break;
1518 spin_unlock_irqrestore(&tport->tp_lock, flags);
1519 timeout = schedule_timeout(timeout);
1520 spin_lock_irqsave(&tport->tp_lock, flags);
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_irqrestore(&tport->tp_lock, flags);
1530
1531 /* wait for data to drain from the device */
1532 /* wait for empty tx register, plus 20 ms */
1533 timeout += jiffies;
1534 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1535 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1536 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1537 && usb_get_intfdata(port->serial->interface)) { /* not disconnected */
1538 if (ti_get_lsr(tport))
1539 break;
1540 msleep_interruptible(20);
1541 }
1542 }
1543
1544
1545 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1546 {
1547 unsigned long flags;
1548
1549 spin_lock_irqsave(&tport->tp_lock, flags);
1550
1551 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1552 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1553
1554 spin_unlock_irqrestore(&tport->tp_lock, flags);
1555 }
1556
1557
1558 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1559 {
1560 struct urb *urb;
1561 int status = 0;
1562 unsigned long flags;
1563
1564 spin_lock_irqsave(&tport->tp_lock, flags);
1565
1566 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1567 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1568 urb = tport->tp_port->read_urb;
1569 spin_unlock_irqrestore(&tport->tp_lock, flags);
1570 urb->complete = ti_bulk_in_callback;
1571 urb->context = tport;
1572 urb->dev = tport->tp_port->serial->dev;
1573 status = usb_submit_urb(urb, GFP_KERNEL);
1574 } else {
1575 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1576 spin_unlock_irqrestore(&tport->tp_lock, flags);
1577 }
1578
1579 return status;
1580 }
1581
1582
1583 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1584 __u16 moduleid, __u16 value, __u8 *data, int size)
1585 {
1586 int status;
1587
1588 status = usb_control_msg(tdev->td_serial->dev,
1589 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1590 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1591 value, moduleid, data, size, 1000);
1592
1593 if (status == size)
1594 status = 0;
1595
1596 if (status > 0)
1597 status = -ECOMM;
1598
1599 return status;
1600 }
1601
1602
1603 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1604 __u16 moduleid, __u16 value, __u8 *data, int size)
1605 {
1606 int status;
1607
1608 status = usb_control_msg(tdev->td_serial->dev,
1609 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1610 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1611 value, moduleid, data, size, 1000);
1612
1613 if (status == size)
1614 status = 0;
1615
1616 if (status > 0)
1617 status = -ECOMM;
1618
1619 return status;
1620 }
1621
1622
1623 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1624 __u8 mask, __u8 byte)
1625 {
1626 int status;
1627 unsigned int size;
1628 struct ti_write_data_bytes *data;
1629 struct device *dev = &tdev->td_serial->dev->dev;
1630
1631 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte);
1632
1633 size = sizeof(struct ti_write_data_bytes) + 2;
1634 data = kmalloc(size, GFP_KERNEL);
1635 if (!data) {
1636 dev_err(dev, "%s - out of memory\n", __FUNCTION__);
1637 return -ENOMEM;
1638 }
1639
1640 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1641 data->bDataType = TI_RW_DATA_BYTE;
1642 data->bDataCounter = 1;
1643 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1644 data->wBaseAddrLo = cpu_to_be16(addr);
1645 data->bData[0] = mask;
1646 data->bData[1] = byte;
1647
1648 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1649 (__u8 *)data, size);
1650
1651 if (status < 0)
1652 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status);
1653
1654 kfree(data);
1655
1656 return status;
1657 }
1658
1659
1660 static int ti_download_firmware(struct ti_device *tdev,
1661 unsigned char *firmware, unsigned int firmware_size)
1662 {
1663 int status = 0;
1664 int buffer_size;
1665 int pos;
1666 int len;
1667 int done;
1668 __u8 cs = 0;
1669 __u8 *buffer;
1670 struct usb_device *dev = tdev->td_serial->dev;
1671 struct ti_firmware_header *header;
1672 unsigned int pipe = usb_sndbulkpipe(dev,
1673 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1674
1675
1676 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1677 buffer = kmalloc(buffer_size, GFP_KERNEL);
1678 if (!buffer) {
1679 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
1680 return -ENOMEM;
1681 }
1682
1683 memcpy(buffer, firmware, firmware_size);
1684 memset(buffer+firmware_size, 0xff, buffer_size-firmware_size);
1685
1686 for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++)
1687 cs = (__u8)(cs + buffer[pos]);
1688
1689 header = (struct ti_firmware_header *)buffer;
1690 header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header)));
1691 header->bCheckSum = cs;
1692
1693 dbg("%s - downloading firmware", __FUNCTION__);
1694 for (pos = 0; pos < buffer_size; pos += done) {
1695 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1696 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000);
1697 if (status)
1698 break;
1699 }
1700
1701 kfree(buffer);
1702
1703 if (status) {
1704 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status);
1705 return status;
1706 }
1707
1708 dbg("%s - download successful", __FUNCTION__);
1709
1710 return 0;
1711 }
1712
1713
1714 /* Circular Buffer Functions */
1715
1716 /*
1717 * ti_buf_alloc
1718 *
1719 * Allocate a circular buffer and all associated memory.
1720 */
1721
1722 static struct circ_buf *ti_buf_alloc(void)
1723 {
1724 struct circ_buf *cb;
1725
1726 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1727 if (cb == NULL)
1728 return NULL;
1729
1730 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1731 if (cb->buf == NULL) {
1732 kfree(cb);
1733 return NULL;
1734 }
1735
1736 ti_buf_clear(cb);
1737
1738 return cb;
1739 }
1740
1741
1742 /*
1743 * ti_buf_free
1744 *
1745 * Free the buffer and all associated memory.
1746 */
1747
1748 static void ti_buf_free(struct circ_buf *cb)
1749 {
1750 kfree(cb->buf);
1751 kfree(cb);
1752 }
1753
1754
1755 /*
1756 * ti_buf_clear
1757 *
1758 * Clear out all data in the circular buffer.
1759 */
1760
1761 static void ti_buf_clear(struct circ_buf *cb)
1762 {
1763 cb->head = cb->tail = 0;
1764 }
1765
1766
1767 /*
1768 * ti_buf_data_avail
1769 *
1770 * Return the number of bytes of data available in the circular
1771 * buffer.
1772 */
1773
1774 static int ti_buf_data_avail(struct circ_buf *cb)
1775 {
1776 return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1777 }
1778
1779
1780 /*
1781 * ti_buf_space_avail
1782 *
1783 * Return the number of bytes of space available in the circular
1784 * buffer.
1785 */
1786
1787 static int ti_buf_space_avail(struct circ_buf *cb)
1788 {
1789 return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1790 }
1791
1792
1793 /*
1794 * ti_buf_put
1795 *
1796 * Copy data data from a user buffer and put it into the circular buffer.
1797 * Restrict to the amount of space available.
1798 *
1799 * Return the number of bytes copied.
1800 */
1801
1802 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1803 {
1804 int c, ret = 0;
1805
1806 while (1) {
1807 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1808 if (count < c)
1809 c = count;
1810 if (c <= 0)
1811 break;
1812 memcpy(cb->buf + cb->head, buf, c);
1813 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1814 buf += c;
1815 count -= c;
1816 ret += c;
1817 }
1818
1819 return ret;
1820 }
1821
1822
1823 /*
1824 * ti_buf_get
1825 *
1826 * Get data from the circular buffer and copy to the given buffer.
1827 * Restrict to the amount of data available.
1828 *
1829 * Return the number of bytes copied.
1830 */
1831
1832 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1833 {
1834 int c, ret = 0;
1835
1836 while (1) {
1837 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1838 if (count < c)
1839 c = count;
1840 if (c <= 0)
1841 break;
1842 memcpy(buf, cb->buf + cb->tail, c);
1843 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1844 buf += c;
1845 count -= c;
1846 ret += c;
1847 }
1848
1849 return ret;
1850 }
Support for the Chinese Samsung S3C2440 based development boards