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[PATCH] W1: possible cleanups
[linux-2.6/verdex.git] / drivers / usb / serial / ti_usb_3410_5052.c
blobc3a2071b802d283de1d6a9a520b883925f698e32
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/config.h>
72 #include <linux/kernel.h>
73 #include <linux/errno.h>
74 #include <linux/init.h>
75 #include <linux/slab.h>
76 #include <linux/tty.h>
77 #include <linux/tty_driver.h>
78 #include <linux/tty_flip.h>
79 #include <linux/module.h>
80 #include <linux/spinlock.h>
81 #include <linux/ioctl.h>
82 #include <linux/serial.h>
83 #include <linux/circ_buf.h>
84 #include <asm/uaccess.h>
85 #include <asm/semaphore.h>
86 #include <linux/usb.h>
87
88 #include "usb-serial.h"
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 semaphore td_open_close_sem;
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 termios *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, struct pt_regs *regs);
171 static void ti_bulk_in_callback(struct urb *urb, struct pt_regs *regs);
172 static void ti_bulk_out_callback(struct urb *urb, struct pt_regs *regs);
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 int vendor_3410_count;
219 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
220 static int product_3410_count;
221 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
222 static int vendor_5052_count;
223 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
224 static 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 };
233
234 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
235 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
236 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
237 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
238 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
239 };
240
241 static struct usb_device_id ti_id_table_combined[] = {
242 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
243 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
244 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
245 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
246 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
247 { }
248 };
249
250 static struct usb_driver ti_usb_driver = {
251 .name = "ti_usb_3410_5052",
252 .probe = usb_serial_probe,
253 .disconnect = usb_serial_disconnect,
254 .id_table = ti_id_table_combined,
255 .no_dynamic_id = 1,
256 };
257
258 static struct usb_serial_driver ti_1port_device = {
259 .driver = {
260 .owner = THIS_MODULE,
261 .name = "ti_usb_3410_5052_1",
262 },
263 .description = "TI USB 3410 1 port adapter",
264 .id_table = ti_id_table_3410,
265 .num_interrupt_in = 1,
266 .num_bulk_in = 1,
267 .num_bulk_out = 1,
268 .num_ports = 1,
269 .attach = ti_startup,
270 .shutdown = ti_shutdown,
271 .open = ti_open,
272 .close = ti_close,
273 .write = ti_write,
274 .write_room = ti_write_room,
275 .chars_in_buffer = ti_chars_in_buffer,
276 .throttle = ti_throttle,
277 .unthrottle = ti_unthrottle,
278 .ioctl = ti_ioctl,
279 .set_termios = ti_set_termios,
280 .tiocmget = ti_tiocmget,
281 .tiocmset = ti_tiocmset,
282 .break_ctl = ti_break,
283 .read_int_callback = ti_interrupt_callback,
284 .read_bulk_callback = ti_bulk_in_callback,
285 .write_bulk_callback = ti_bulk_out_callback,
286 };
287
288 static struct usb_serial_driver ti_2port_device = {
289 .driver = {
290 .owner = THIS_MODULE,
291 .name = "ti_usb_3410_5052_2",
292 },
293 .description = "TI USB 5052 2 port adapter",
294 .id_table = ti_id_table_5052,
295 .num_interrupt_in = 1,
296 .num_bulk_in = 2,
297 .num_bulk_out = 2,
298 .num_ports = 2,
299 .attach = ti_startup,
300 .shutdown = ti_shutdown,
301 .open = ti_open,
302 .close = ti_close,
303 .write = ti_write,
304 .write_room = ti_write_room,
305 .chars_in_buffer = ti_chars_in_buffer,
306 .throttle = ti_throttle,
307 .unthrottle = ti_unthrottle,
308 .ioctl = ti_ioctl,
309 .set_termios = ti_set_termios,
310 .tiocmget = ti_tiocmget,
311 .tiocmset = ti_tiocmset,
312 .break_ctl = ti_break,
313 .read_int_callback = ti_interrupt_callback,
314 .read_bulk_callback = ti_bulk_in_callback,
315 .write_bulk_callback = ti_bulk_out_callback,
316 };
317
318
319 /* Module */
320
321 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
322 MODULE_DESCRIPTION(TI_DRIVER_DESC);
323 MODULE_VERSION(TI_DRIVER_VERSION);
324 MODULE_LICENSE("GPL");
325
326 module_param(debug, bool, S_IRUGO | S_IWUSR);
327 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
328
329 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
330 MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off");
331
332 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
333 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain in close, in .01 secs, default is 4000");
334
335 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
336 MODULE_PARM_DESC(vendor_3410, "Vendor ids for 3410 based devices, 1-5 short integers");
337 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
338 MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers");
339 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
340 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers");
341 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
342 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers");
343
344 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
345
346
347 /* Functions */
348
349 static int __init ti_init(void)
350 {
351 int i,j;
352 int ret;
353
354 /* insert extra vendor and product ids */
355 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
356 for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) {
357 ti_id_table_3410[j].idVendor = vendor_3410[i];
358 ti_id_table_3410[j].idProduct = product_3410[i];
359 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
360 }
361 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
362 for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) {
363 ti_id_table_5052[j].idVendor = vendor_5052[i];
364 ti_id_table_5052[j].idProduct = product_5052[i];
365 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
366 }
367
368 ret = usb_serial_register(&ti_1port_device);
369 if (ret)
370 goto failed_1port;
371 ret = usb_serial_register(&ti_2port_device);
372 if (ret)
373 goto failed_2port;
374
375 ret = usb_register(&ti_usb_driver);
376 if (ret)
377 goto failed_usb;
378
379 info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
380
381 return 0;
382
383 failed_usb:
384 usb_serial_deregister(&ti_2port_device);
385 failed_2port:
386 usb_serial_deregister(&ti_1port_device);
387 failed_1port:
388 return ret;
389 }
390
391
392 static void __exit ti_exit(void)
393 {
394 usb_serial_deregister(&ti_1port_device);
395 usb_serial_deregister(&ti_2port_device);
396 usb_deregister(&ti_usb_driver);
397 }
398
399
400 module_init(ti_init);
401 module_exit(ti_exit);
402
403
404 static int ti_startup(struct usb_serial *serial)
405 {
406 struct ti_device *tdev;
407 struct ti_port *tport;
408 struct usb_device *dev = serial->dev;
409 int status;
410 int i;
411
412
413 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
414 __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct),
415 dev->descriptor.bNumConfigurations,
416 dev->actconfig->desc.bConfigurationValue);
417
418 /* create device structure */
419 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
420 if (tdev == NULL) {
421 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
422 return -ENOMEM;
423 }
424 sema_init(&tdev->td_open_close_sem, 1);
425 tdev->td_serial = serial;
426 usb_set_serial_data(serial, tdev);
427
428 /* determine device type */
429 if (usb_match_id(serial->interface, ti_id_table_3410))
430 tdev->td_is_3410 = 1;
431 dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052");
432
433 /* if we have only 1 configuration, download firmware */
434 if (dev->descriptor.bNumConfigurations == 1) {
435
436 if (tdev->td_is_3410)
437 status = ti_download_firmware(tdev, ti_fw_3410,
438 sizeof(ti_fw_3410));
439 else
440 status = ti_download_firmware(tdev, ti_fw_5052,
441 sizeof(ti_fw_5052));
442 if (status)
443 goto free_tdev;
444
445 /* 3410 must be reset, 5052 resets itself */
446 if (tdev->td_is_3410) {
447 msleep_interruptible(100);
448 usb_reset_device(dev);
449 }
450
451 status = -ENODEV;
452 goto free_tdev;
453 }
454
455 /* the second configuration must be set (in sysfs by hotplug script) */
456 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
457 status = -ENODEV;
458 goto free_tdev;
459 }
460
461 /* set up port structures */
462 for (i = 0; i < serial->num_ports; ++i) {
463 tport = kmalloc(sizeof(struct ti_port), GFP_KERNEL);
464 if (tport == NULL) {
465 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
466 status = -ENOMEM;
467 goto free_tports;
468 }
469 memset(tport, 0, sizeof(struct ti_port));
470 spin_lock_init(&tport->tp_lock);
471 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
472 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
473 tport->tp_closing_wait = closing_wait;
474 init_waitqueue_head(&tport->tp_msr_wait);
475 init_waitqueue_head(&tport->tp_write_wait);
476 tport->tp_write_buf = ti_buf_alloc();
477 if (tport->tp_write_buf == NULL) {
478 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
479 kfree(tport);
480 status = -ENOMEM;
481 goto free_tports;
482 }
483 tport->tp_port = serial->port[i];
484 tport->tp_tdev = tdev;
485 usb_set_serial_port_data(serial->port[i], tport);
486 tport->tp_uart_mode = 0; /* default is RS232 */
487 }
488
489 return 0;
490
491 free_tports:
492 for (--i; i>=0; --i) {
493 tport = usb_get_serial_port_data(serial->port[i]);
494 ti_buf_free(tport->tp_write_buf);
495 kfree(tport);
496 usb_set_serial_port_data(serial->port[i], NULL);
497 }
498 free_tdev:
499 kfree(tdev);
500 usb_set_serial_data(serial, NULL);
501 return status;
502 }
503
504
505 static void ti_shutdown(struct usb_serial *serial)
506 {
507 int i;
508 struct ti_device *tdev = usb_get_serial_data(serial);
509 struct ti_port *tport;
510
511 dbg("%s", __FUNCTION__);
512
513 for (i=0; i < serial->num_ports; ++i) {
514 tport = usb_get_serial_port_data(serial->port[i]);
515 if (tport) {
516 ti_buf_free(tport->tp_write_buf);
517 kfree(tport);
518 usb_set_serial_port_data(serial->port[i], NULL);
519 }
520 }
521
522 kfree(tdev);
523 usb_set_serial_data(serial, NULL);
524 }
525
526
527 static int ti_open(struct usb_serial_port *port, struct file *file)
528 {
529 struct ti_port *tport = usb_get_serial_port_data(port);
530 struct ti_device *tdev;
531 struct usb_device *dev;
532 struct urb *urb;
533 int port_number;
534 int status;
535 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
536 TI_PIPE_TIMEOUT_ENABLE |
537 (TI_TRANSFER_TIMEOUT << 2));
538
539 dbg("%s - port %d", __FUNCTION__, port->number);
540
541 if (tport == NULL)
542 return -ENODEV;
543
544 dev = port->serial->dev;
545 tdev = tport->tp_tdev;
546
547 /* only one open on any port on a device at a time */
548 if (down_interruptible(&tdev->td_open_close_sem))
549 return -ERESTARTSYS;
550
551 if (port->tty)
552 port->tty->low_latency =
553 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
554
555 port_number = port->number - port->serial->minor;
556
557 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
558
559 tport->tp_msr = 0;
560 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
561
562 /* start interrupt urb the first time a port is opened on this device */
563 if (tdev->td_open_port_count == 0) {
564 dbg("%s - start interrupt in urb", __FUNCTION__);
565 urb = tdev->td_serial->port[0]->interrupt_in_urb;
566 if (!urb) {
567 dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__);
568 status = -EINVAL;
569 goto up_sem;
570 }
571 urb->complete = ti_interrupt_callback;
572 urb->context = tdev;
573 urb->dev = dev;
574 status = usb_submit_urb(urb, GFP_KERNEL);
575 if (status) {
576 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status);
577 goto up_sem;
578 }
579 }
580
581 ti_set_termios(port, NULL);
582
583 dbg("%s - sending TI_OPEN_PORT", __FUNCTION__);
584 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
585 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
586 if (status) {
587 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status);
588 goto unlink_int_urb;
589 }
590
591 dbg("%s - sending TI_START_PORT", __FUNCTION__);
592 status = ti_command_out_sync(tdev, TI_START_PORT,
593 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
594 if (status) {
595 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status);
596 goto unlink_int_urb;
597 }
598
599 dbg("%s - sending TI_PURGE_PORT", __FUNCTION__);
600 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
601 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
602 if (status) {
603 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status);
604 goto unlink_int_urb;
605 }
606 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
607 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
608 if (status) {
609 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status);
610 goto unlink_int_urb;
611 }
612
613 /* reset the data toggle on the bulk endpoints to work around bug in
614 * host controllers where things get out of sync some times */
615 usb_clear_halt(dev, port->write_urb->pipe);
616 usb_clear_halt(dev, port->read_urb->pipe);
617
618 ti_set_termios(port, NULL);
619
620 dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__);
621 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
622 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
623 if (status) {
624 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status);
625 goto unlink_int_urb;
626 }
627
628 dbg("%s - sending TI_START_PORT (2)", __FUNCTION__);
629 status = ti_command_out_sync(tdev, TI_START_PORT,
630 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
631 if (status) {
632 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status);
633 goto unlink_int_urb;
634 }
635
636 /* start read urb */
637 dbg("%s - start read urb", __FUNCTION__);
638 urb = port->read_urb;
639 if (!urb) {
640 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__);
641 status = -EINVAL;
642 goto unlink_int_urb;
643 }
644 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
645 urb->complete = ti_bulk_in_callback;
646 urb->context = tport;
647 urb->dev = dev;
648 status = usb_submit_urb(urb, GFP_KERNEL);
649 if (status) {
650 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status);
651 goto unlink_int_urb;
652 }
653
654 tport->tp_is_open = 1;
655 ++tdev->td_open_port_count;
656
657 goto up_sem;
658
659 unlink_int_urb:
660 if (tdev->td_open_port_count == 0)
661 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
662 up_sem:
663 up(&tdev->td_open_close_sem);
664 dbg("%s - exit %d", __FUNCTION__, status);
665 return status;
666 }
667
668
669 static void ti_close(struct usb_serial_port *port, struct file *file)
670 {
671 struct ti_device *tdev;
672 struct ti_port *tport;
673 int port_number;
674 int status;
675 int do_up;
676
677 dbg("%s - port %d", __FUNCTION__, port->number);
678
679 tdev = usb_get_serial_data(port->serial);
680 tport = usb_get_serial_port_data(port);
681 if (tdev == NULL || tport == NULL)
682 return;
683
684 tport->tp_is_open = 0;
685
686 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
687
688 usb_kill_urb(port->read_urb);
689 usb_kill_urb(port->write_urb);
690 tport->tp_write_urb_in_use = 0;
691
692 port_number = port->number - port->serial->minor;
693
694 dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__);
695 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
696 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
697 if (status)
698 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status);
699
700 /* if down is interrupted, continue anyway */
701 do_up = !down_interruptible(&tdev->td_open_close_sem);
702 --tport->tp_tdev->td_open_port_count;
703 if (tport->tp_tdev->td_open_port_count <= 0) {
704 /* last port is closed, shut down interrupt urb */
705 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
706 tport->tp_tdev->td_open_port_count = 0;
707 }
708 if (do_up)
709 up(&tdev->td_open_close_sem);
710
711 dbg("%s - exit", __FUNCTION__);
712 }
713
714
715 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
716 int count)
717 {
718 struct ti_port *tport = usb_get_serial_port_data(port);
719 unsigned long flags;
720
721 dbg("%s - port %d", __FUNCTION__, port->number);
722
723 if (count == 0) {
724 dbg("%s - write request of 0 bytes", __FUNCTION__);
725 return 0;
726 }
727
728 if (tport == NULL || !tport->tp_is_open)
729 return -ENODEV;
730
731 spin_lock_irqsave(&tport->tp_lock, flags);
732 count = ti_buf_put(tport->tp_write_buf, data, count);
733 spin_unlock_irqrestore(&tport->tp_lock, flags);
734
735 ti_send(tport);
736
737 return count;
738 }
739
740
741 static int ti_write_room(struct usb_serial_port *port)
742 {
743 struct ti_port *tport = usb_get_serial_port_data(port);
744 int room = 0;
745 unsigned long flags;
746
747 dbg("%s - port %d", __FUNCTION__, port->number);
748
749 if (tport == NULL)
750 return -ENODEV;
751
752 spin_lock_irqsave(&tport->tp_lock, flags);
753 room = ti_buf_space_avail(tport->tp_write_buf);
754 spin_unlock_irqrestore(&tport->tp_lock, flags);
755
756 dbg("%s - returns %d", __FUNCTION__, room);
757 return room;
758 }
759
760
761 static int ti_chars_in_buffer(struct usb_serial_port *port)
762 {
763 struct ti_port *tport = usb_get_serial_port_data(port);
764 int chars = 0;
765 unsigned long flags;
766
767 dbg("%s - port %d", __FUNCTION__, port->number);
768
769 if (tport == NULL)
770 return -ENODEV;
771
772 spin_lock_irqsave(&tport->tp_lock, flags);
773 chars = ti_buf_data_avail(tport->tp_write_buf);
774 spin_unlock_irqrestore(&tport->tp_lock, flags);
775
776 dbg("%s - returns %d", __FUNCTION__, chars);
777 return chars;
778 }
779
780
781 static void ti_throttle(struct usb_serial_port *port)
782 {
783 struct ti_port *tport = usb_get_serial_port_data(port);
784 struct tty_struct *tty;
785
786 dbg("%s - port %d", __FUNCTION__, port->number);
787
788 if (tport == NULL)
789 return;
790
791 tty = port->tty;
792 if (!tty) {
793 dbg("%s - no tty", __FUNCTION__);
794 return;
795 }
796
797 if (I_IXOFF(tty) || C_CRTSCTS(tty))
798 ti_stop_read(tport, tty);
799
800 }
801
802
803 static void ti_unthrottle(struct usb_serial_port *port)
804 {
805 struct ti_port *tport = usb_get_serial_port_data(port);
806 struct tty_struct *tty;
807 int status;
808
809 dbg("%s - port %d", __FUNCTION__, port->number);
810
811 if (tport == NULL)
812 return;
813
814 tty = port->tty;
815 if (!tty) {
816 dbg("%s - no tty", __FUNCTION__);
817 return;
818 }
819
820 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
821 status = ti_restart_read(tport, tty);
822 if (status)
823 dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status);
824 }
825 }
826
827
828 static int ti_ioctl(struct usb_serial_port *port, struct file *file,
829 unsigned int cmd, unsigned long arg)
830 {
831 struct ti_port *tport = usb_get_serial_port_data(port);
832 struct async_icount cnow;
833 struct async_icount cprev;
834
835 dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd);
836
837 if (tport == NULL)
838 return -ENODEV;
839
840 switch (cmd) {
841 case TIOCGSERIAL:
842 dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
843 return ti_get_serial_info(tport, (struct serial_struct __user *)arg);
844 break;
845
846 case TIOCSSERIAL:
847 dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
848 return ti_set_serial_info(tport, (struct serial_struct __user *)arg);
849 break;
850
851 case TIOCMIWAIT:
852 dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
853 cprev = tport->tp_icount;
854 while (1) {
855 interruptible_sleep_on(&tport->tp_msr_wait);
856 if (signal_pending(current))
857 return -ERESTARTSYS;
858 cnow = tport->tp_icount;
859 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
860 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
861 return -EIO; /* no change => error */
862 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
863 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
864 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
865 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
866 return 0;
867 }
868 cprev = cnow;
869 }
870 break;
871
872 case TIOCGICOUNT:
873 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx);
874 if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount)))
875 return -EFAULT;
876 return 0;
877 }
878
879 return -ENOIOCTLCMD;
880 }
881
882
883 static void ti_set_termios(struct usb_serial_port *port,
884 struct termios *old_termios)
885 {
886 struct ti_port *tport = usb_get_serial_port_data(port);
887 struct tty_struct *tty = port->tty;
888 struct ti_uart_config *config;
889 tcflag_t cflag,iflag;
890 int baud;
891 int status;
892 int port_number = port->number - port->serial->minor;
893 unsigned int mcr;
894
895 dbg("%s - port %d", __FUNCTION__, port->number);
896
897 if (!tty || !tty->termios) {
898 dbg("%s - no tty or termios", __FUNCTION__);
899 return;
900 }
901
902 cflag = tty->termios->c_cflag;
903 iflag = tty->termios->c_iflag;
904
905 if (old_termios && cflag == old_termios->c_cflag
906 && iflag == old_termios->c_iflag) {
907 dbg("%s - nothing to change", __FUNCTION__);
908 return;
909 }
910
911 dbg("%s - clfag %08x, iflag %08x", __FUNCTION__, cflag, iflag);
912
913 if (old_termios)
914 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag);
915
916 if (tport == NULL)
917 return;
918
919 config = kmalloc(sizeof(*config), GFP_KERNEL);
920 if (!config) {
921 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
922 return;
923 }
924
925 config->wFlags = 0;
926
927 /* these flags must be set */
928 config->wFlags |= TI_UART_ENABLE_MS_INTS;
929 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
930 config->bUartMode = (__u8)(tport->tp_uart_mode);
931
932 switch (cflag & CSIZE) {
933 case CS5:
934 config->bDataBits = TI_UART_5_DATA_BITS;
935 break;
936 case CS6:
937 config->bDataBits = TI_UART_6_DATA_BITS;
938 break;
939 case CS7:
940 config->bDataBits = TI_UART_7_DATA_BITS;
941 break;
942 default:
943 case CS8:
944 config->bDataBits = TI_UART_8_DATA_BITS;
945 break;
946 }
947
948 if (cflag & PARENB) {
949 if (cflag & PARODD) {
950 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
951 config->bParity = TI_UART_ODD_PARITY;
952 } else {
953 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
954 config->bParity = TI_UART_EVEN_PARITY;
955 }
956 } else {
957 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
958 config->bParity = TI_UART_NO_PARITY;
959 }
960
961 if (cflag & CSTOPB)
962 config->bStopBits = TI_UART_2_STOP_BITS;
963 else
964 config->bStopBits = TI_UART_1_STOP_BITS;
965
966 if (cflag & CRTSCTS) {
967 /* RTS flow control must be off to drop RTS for baud rate B0 */
968 if ((cflag & CBAUD) != B0)
969 config->wFlags |= TI_UART_ENABLE_RTS_IN;
970 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
971 } else {
972 tty->hw_stopped = 0;
973 ti_restart_read(tport, tty);
974 }
975
976 if (I_IXOFF(tty) || I_IXON(tty)) {
977 config->cXon = START_CHAR(tty);
978 config->cXoff = STOP_CHAR(tty);
979
980 if (I_IXOFF(tty))
981 config->wFlags |= TI_UART_ENABLE_X_IN;
982 else
983 ti_restart_read(tport, tty);
984
985 if (I_IXON(tty))
986 config->wFlags |= TI_UART_ENABLE_X_OUT;
987 }
988
989 baud = tty_get_baud_rate(tty);
990 if (!baud) baud = 9600;
991 if (tport->tp_tdev->td_is_3410)
992 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
993 else
994 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
995
996 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
997 __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
998
999 cpu_to_be16s(&config->wBaudRate);
1000 cpu_to_be16s(&config->wFlags);
1001
1002 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1003 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1004 sizeof(*config));
1005 if (status)
1006 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status);
1007
1008 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1009 mcr = tport->tp_shadow_mcr;
1010 /* if baud rate is B0, clear RTS and DTR */
1011 if ((cflag & CBAUD) == B0)
1012 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1013 status = ti_set_mcr(tport, mcr);
1014 if (status)
1015 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status);
1016
1017 kfree(config);
1018 }
1019
1020
1021 static int ti_tiocmget(struct usb_serial_port *port, struct file *file)
1022 {
1023 struct ti_port *tport = usb_get_serial_port_data(port);
1024 unsigned int result;
1025 unsigned int msr;
1026 unsigned int mcr;
1027
1028 dbg("%s - port %d", __FUNCTION__, port->number);
1029
1030 if (tport == NULL)
1031 return -ENODEV;
1032
1033 msr = tport->tp_msr;
1034 mcr = tport->tp_shadow_mcr;
1035
1036 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1037 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1038 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1039 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1040 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1041 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1042 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1043
1044 dbg("%s - 0x%04X", __FUNCTION__, result);
1045
1046 return result;
1047 }
1048
1049
1050 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
1051 unsigned int set, unsigned int clear)
1052 {
1053 struct ti_port *tport = usb_get_serial_port_data(port);
1054 unsigned int mcr;
1055
1056 dbg("%s - port %d", __FUNCTION__, port->number);
1057
1058 if (tport == NULL)
1059 return -ENODEV;
1060
1061 mcr = tport->tp_shadow_mcr;
1062
1063 if (set & TIOCM_RTS)
1064 mcr |= TI_MCR_RTS;
1065 if (set & TIOCM_DTR)
1066 mcr |= TI_MCR_DTR;
1067 if (set & TIOCM_LOOP)
1068 mcr |= TI_MCR_LOOP;
1069
1070 if (clear & TIOCM_RTS)
1071 mcr &= ~TI_MCR_RTS;
1072 if (clear & TIOCM_DTR)
1073 mcr &= ~TI_MCR_DTR;
1074 if (clear & TIOCM_LOOP)
1075 mcr &= ~TI_MCR_LOOP;
1076
1077 return ti_set_mcr(tport, mcr);
1078 }
1079
1080
1081 static void ti_break(struct usb_serial_port *port, int break_state)
1082 {
1083 struct ti_port *tport = usb_get_serial_port_data(port);
1084 int status;
1085
1086 dbg("%s - state = %d", __FUNCTION__, break_state);
1087
1088 if (tport == NULL)
1089 return;
1090
1091 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1092
1093 status = ti_write_byte(tport->tp_tdev,
1094 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1095 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1096
1097 if (status)
1098 dbg("%s - error setting break, %d", __FUNCTION__, status);
1099 }
1100
1101
1102 static void ti_interrupt_callback(struct urb *urb, struct pt_regs *regs)
1103 {
1104 struct ti_device *tdev = (struct ti_device *)urb->context;
1105 struct usb_serial_port *port;
1106 struct usb_serial *serial = tdev->td_serial;
1107 struct ti_port *tport;
1108 struct device *dev = &urb->dev->dev;
1109 unsigned char *data = urb->transfer_buffer;
1110 int length = urb->actual_length;
1111 int port_number;
1112 int function;
1113 int status;
1114 __u8 msr;
1115
1116 dbg("%s", __FUNCTION__);
1117
1118 switch (urb->status) {
1119 case 0:
1120 break;
1121 case -ECONNRESET:
1122 case -ENOENT:
1123 case -ESHUTDOWN:
1124 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1125 tdev->td_urb_error = 1;
1126 return;
1127 default:
1128 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1129 tdev->td_urb_error = 1;
1130 goto exit;
1131 }
1132
1133 if (length != 2) {
1134 dbg("%s - bad packet size, %d", __FUNCTION__, length);
1135 goto exit;
1136 }
1137
1138 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1139 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]);
1140 goto exit;
1141 }
1142
1143 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1144 function = TI_GET_FUNC_FROM_CODE(data[0]);
1145
1146 dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]);
1147
1148 if (port_number >= serial->num_ports) {
1149 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number);
1150 goto exit;
1151 }
1152
1153 port = serial->port[port_number];
1154
1155 tport = usb_get_serial_port_data(port);
1156 if (!tport)
1157 goto exit;
1158
1159 switch (function) {
1160 case TI_CODE_DATA_ERROR:
1161 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]);
1162 break;
1163
1164 case TI_CODE_MODEM_STATUS:
1165 msr = data[1];
1166 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr);
1167 ti_handle_new_msr(tport, msr);
1168 break;
1169
1170 default:
1171 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]);
1172 break;
1173 }
1174
1175 exit:
1176 status = usb_submit_urb(urb, GFP_ATOMIC);
1177 if (status)
1178 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", __FUNCTION__, status);
1179 }
1180
1181
1182 static void ti_bulk_in_callback(struct urb *urb, struct pt_regs *regs)
1183 {
1184 struct ti_port *tport = (struct ti_port *)urb->context;
1185 struct usb_serial_port *port = tport->tp_port;
1186 struct device *dev = &urb->dev->dev;
1187 int status = 0;
1188
1189 dbg("%s", __FUNCTION__);
1190
1191 switch (urb->status) {
1192 case 0:
1193 break;
1194 case -ECONNRESET:
1195 case -ENOENT:
1196 case -ESHUTDOWN:
1197 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1198 tport->tp_tdev->td_urb_error = 1;
1199 wake_up_interruptible(&tport->tp_write_wait);
1200 return;
1201 default:
1202 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status );
1203 tport->tp_tdev->td_urb_error = 1;
1204 wake_up_interruptible(&tport->tp_write_wait);
1205 }
1206
1207 if (urb->status == -EPIPE)
1208 goto exit;
1209
1210 if (urb->status) {
1211 dev_err(dev, "%s - stopping read!\n", __FUNCTION__);
1212 return;
1213 }
1214
1215 if (port->tty && urb->actual_length) {
1216 usb_serial_debug_data(debug, dev, __FUNCTION__,
1217 urb->actual_length, urb->transfer_buffer);
1218
1219 if (!tport->tp_is_open)
1220 dbg("%s - port closed, dropping data", __FUNCTION__);
1221 else
1222 ti_recv(&urb->dev->dev, port->tty, 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 }
1229
1230 exit:
1231 /* continue to read unless stopping */
1232 spin_lock(&tport->tp_lock);
1233 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1234 urb->dev = port->serial->dev;
1235 status = usb_submit_urb(urb, GFP_ATOMIC);
1236 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1237 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1238 }
1239 spin_unlock(&tport->tp_lock);
1240 if (status)
1241 dev_err(dev, "%s - resubmit read urb failed, %d\n", __FUNCTION__, status);
1242 }
1243
1244
1245 static void ti_bulk_out_callback(struct urb *urb, struct pt_regs *regs)
1246 {
1247 struct ti_port *tport = (struct ti_port *)urb->context;
1248 struct usb_serial_port *port = tport->tp_port;
1249 struct device *dev = &urb->dev->dev;
1250
1251 dbg("%s - port %d", __FUNCTION__, port->number);
1252
1253 tport->tp_write_urb_in_use = 0;
1254
1255 switch (urb->status) {
1256 case 0:
1257 break;
1258 case -ECONNRESET:
1259 case -ENOENT:
1260 case -ESHUTDOWN:
1261 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1262 tport->tp_tdev->td_urb_error = 1;
1263 wake_up_interruptible(&tport->tp_write_wait);
1264 return;
1265 default:
1266 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1267 tport->tp_tdev->td_urb_error = 1;
1268 wake_up_interruptible(&tport->tp_write_wait);
1269 }
1270
1271 /* send any buffered data */
1272 ti_send(tport);
1273 }
1274
1275
1276 static void ti_recv(struct device *dev, struct tty_struct *tty,
1277 unsigned char *data, int length)
1278 {
1279 int cnt;
1280
1281 do {
1282 cnt = tty_buffer_request_room(tty, length);
1283 if (cnt < length) {
1284 dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length - cnt);
1285 if(cnt == 0)
1286 break;
1287 }
1288 tty_insert_flip_string(tty, data, cnt);
1289 tty_flip_buffer_push(tty);
1290 data += cnt;
1291 length -= cnt;
1292 } while (length > 0);
1293
1294 }
1295
1296
1297 static void ti_send(struct ti_port *tport)
1298 {
1299 int count, result;
1300 struct usb_serial_port *port = tport->tp_port;
1301 struct tty_struct *tty = port->tty;
1302 unsigned long flags;
1303
1304
1305 dbg("%s - port %d", __FUNCTION__, port->number);
1306
1307 spin_lock_irqsave(&tport->tp_lock, flags);
1308
1309 if (tport->tp_write_urb_in_use) {
1310 spin_unlock_irqrestore(&tport->tp_lock, flags);
1311 return;
1312 }
1313
1314 count = ti_buf_get(tport->tp_write_buf,
1315 port->write_urb->transfer_buffer,
1316 port->bulk_out_size);
1317
1318 if (count == 0) {
1319 spin_unlock_irqrestore(&tport->tp_lock, flags);
1320 return;
1321 }
1322
1323 tport->tp_write_urb_in_use = 1;
1324
1325 spin_unlock_irqrestore(&tport->tp_lock, flags);
1326
1327 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
1328
1329 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1330 usb_sndbulkpipe(port->serial->dev,
1331 port->bulk_out_endpointAddress),
1332 port->write_urb->transfer_buffer, count,
1333 ti_bulk_out_callback, tport);
1334
1335 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1336 if (result) {
1337 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result);
1338 tport->tp_write_urb_in_use = 0;
1339 /* TODO: reschedule ti_send */
1340 } else {
1341 spin_lock_irqsave(&tport->tp_lock, flags);
1342 tport->tp_icount.tx += count;
1343 spin_unlock_irqrestore(&tport->tp_lock, flags);
1344 }
1345
1346 /* more room in the buffer for new writes, wakeup */
1347 if (tty)
1348 tty_wakeup(tty);
1349 wake_up_interruptible(&tport->tp_write_wait);
1350 }
1351
1352
1353 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1354 {
1355 int status;
1356
1357 status = ti_write_byte(tport->tp_tdev,
1358 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1359 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1360
1361 if (!status)
1362 tport->tp_shadow_mcr = mcr;
1363
1364 return status;
1365 }
1366
1367
1368 static int ti_get_lsr(struct ti_port *tport)
1369 {
1370 int size,status;
1371 struct ti_device *tdev = tport->tp_tdev;
1372 struct usb_serial_port *port = tport->tp_port;
1373 int port_number = port->number - port->serial->minor;
1374 struct ti_port_status *data;
1375
1376 dbg("%s - port %d", __FUNCTION__, port->number);
1377
1378 size = sizeof(struct ti_port_status);
1379 data = kmalloc(size, GFP_KERNEL);
1380 if (!data) {
1381 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
1382 return -ENOMEM;
1383 }
1384
1385 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1386 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1387 if (status) {
1388 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status);
1389 goto free_data;
1390 }
1391
1392 dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR);
1393
1394 tport->tp_lsr = data->bLSR;
1395
1396 free_data:
1397 kfree(data);
1398 return status;
1399 }
1400
1401
1402 static int ti_get_serial_info(struct ti_port *tport,
1403 struct serial_struct __user *ret_arg)
1404 {
1405 struct usb_serial_port *port = tport->tp_port;
1406 struct serial_struct ret_serial;
1407
1408 if (!ret_arg)
1409 return -EFAULT;
1410
1411 memset(&ret_serial, 0, sizeof(ret_serial));
1412
1413 ret_serial.type = PORT_16550A;
1414 ret_serial.line = port->serial->minor;
1415 ret_serial.port = port->number - port->serial->minor;
1416 ret_serial.flags = tport->tp_flags;
1417 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1418 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1419 ret_serial.closing_wait = tport->tp_closing_wait;
1420
1421 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1422 return -EFAULT;
1423
1424 return 0;
1425 }
1426
1427
1428 static int ti_set_serial_info(struct ti_port *tport,
1429 struct serial_struct __user *new_arg)
1430 {
1431 struct usb_serial_port *port = tport->tp_port;
1432 struct serial_struct new_serial;
1433
1434 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1435 return -EFAULT;
1436
1437 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1438 if (port->tty)
1439 port->tty->low_latency =
1440 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1441 tport->tp_closing_wait = new_serial.closing_wait;
1442
1443 return 0;
1444 }
1445
1446
1447 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1448 {
1449 struct async_icount *icount;
1450 struct tty_struct *tty;
1451 unsigned long flags;
1452
1453 dbg("%s - msr 0x%02X", __FUNCTION__, msr);
1454
1455 if (msr & TI_MSR_DELTA_MASK) {
1456 spin_lock_irqsave(&tport->tp_lock, flags);
1457 icount = &tport->tp_icount;
1458 if (msr & TI_MSR_DELTA_CTS)
1459 icount->cts++;
1460 if (msr & TI_MSR_DELTA_DSR)
1461 icount->dsr++;
1462 if (msr & TI_MSR_DELTA_CD)
1463 icount->dcd++;
1464 if (msr & TI_MSR_DELTA_RI)
1465 icount->rng++;
1466 wake_up_interruptible(&tport->tp_msr_wait);
1467 spin_unlock_irqrestore(&tport->tp_lock, flags);
1468 }
1469
1470 tport->tp_msr = msr & TI_MSR_MASK;
1471
1472 /* handle CTS flow control */
1473 tty = tport->tp_port->tty;
1474 if (tty && C_CRTSCTS(tty)) {
1475 if (msr & TI_MSR_CTS) {
1476 tty->hw_stopped = 0;
1477 tty_wakeup(tty);
1478 } else {
1479 tty->hw_stopped = 1;
1480 }
1481 }
1482 }
1483
1484
1485 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1486 {
1487 struct ti_device *tdev = tport->tp_tdev;
1488 struct usb_serial_port *port = tport->tp_port;
1489 wait_queue_t wait;
1490 unsigned long flags;
1491
1492 dbg("%s - port %d", __FUNCTION__, port->number);
1493
1494 spin_lock_irqsave(&tport->tp_lock, flags);
1495
1496 /* wait for data to drain from the buffer */
1497 tdev->td_urb_error = 0;
1498 init_waitqueue_entry(&wait, current);
1499 add_wait_queue(&tport->tp_write_wait, &wait);
1500 for (;;) {
1501 set_current_state(TASK_INTERRUPTIBLE);
1502 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1503 || timeout == 0 || signal_pending(current)
1504 || tdev->td_urb_error
1505 || !usb_get_intfdata(port->serial->interface)) /* disconnect */
1506 break;
1507 spin_unlock_irqrestore(&tport->tp_lock, flags);
1508 timeout = schedule_timeout(timeout);
1509 spin_lock_irqsave(&tport->tp_lock, flags);
1510 }
1511 set_current_state(TASK_RUNNING);
1512 remove_wait_queue(&tport->tp_write_wait, &wait);
1513
1514 /* flush any remaining data in the buffer */
1515 if (flush)
1516 ti_buf_clear(tport->tp_write_buf);
1517
1518 spin_unlock_irqrestore(&tport->tp_lock, flags);
1519
1520 /* wait for data to drain from the device */
1521 /* wait for empty tx register, plus 20 ms */
1522 timeout += jiffies;
1523 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1524 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1525 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1526 && usb_get_intfdata(port->serial->interface)) { /* not disconnected */
1527 if (ti_get_lsr(tport))
1528 break;
1529 msleep_interruptible(20);
1530 }
1531 }
1532
1533
1534 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1535 {
1536 unsigned long flags;
1537
1538 spin_lock_irqsave(&tport->tp_lock, flags);
1539
1540 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1541 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1542
1543 spin_unlock_irqrestore(&tport->tp_lock, flags);
1544 }
1545
1546
1547 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1548 {
1549 struct urb *urb;
1550 int status = 0;
1551 unsigned long flags;
1552
1553 spin_lock_irqsave(&tport->tp_lock, flags);
1554
1555 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1556 urb = tport->tp_port->read_urb;
1557 urb->complete = ti_bulk_in_callback;
1558 urb->context = tport;
1559 urb->dev = tport->tp_port->serial->dev;
1560 status = usb_submit_urb(urb, GFP_KERNEL);
1561 }
1562 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1563
1564 spin_unlock_irqrestore(&tport->tp_lock, flags);
1565
1566 return status;
1567 }
1568
1569
1570 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1571 __u16 moduleid, __u16 value, __u8 *data, int size)
1572 {
1573 int status;
1574
1575 status = usb_control_msg(tdev->td_serial->dev,
1576 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1577 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1578 value, moduleid, data, size, 1000);
1579
1580 if (status == size)
1581 status = 0;
1582
1583 if (status > 0)
1584 status = -ECOMM;
1585
1586 return status;
1587 }
1588
1589
1590 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1591 __u16 moduleid, __u16 value, __u8 *data, int size)
1592 {
1593 int status;
1594
1595 status = usb_control_msg(tdev->td_serial->dev,
1596 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1597 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1598 value, moduleid, data, size, 1000);
1599
1600 if (status == size)
1601 status = 0;
1602
1603 if (status > 0)
1604 status = -ECOMM;
1605
1606 return status;
1607 }
1608
1609
1610 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1611 __u8 mask, __u8 byte)
1612 {
1613 int status;
1614 unsigned int size;
1615 struct ti_write_data_bytes *data;
1616 struct device *dev = &tdev->td_serial->dev->dev;
1617
1618 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte);
1619
1620 size = sizeof(struct ti_write_data_bytes) + 2;
1621 data = kmalloc(size, GFP_KERNEL);
1622 if (!data) {
1623 dev_err(dev, "%s - out of memory\n", __FUNCTION__);
1624 return -ENOMEM;
1625 }
1626
1627 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1628 data->bDataType = TI_RW_DATA_BYTE;
1629 data->bDataCounter = 1;
1630 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1631 data->wBaseAddrLo = cpu_to_be16(addr);
1632 data->bData[0] = mask;
1633 data->bData[1] = byte;
1634
1635 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1636 (__u8 *)data, size);
1637
1638 if (status < 0)
1639 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status);
1640
1641 kfree(data);
1642
1643 return status;
1644 }
1645
1646
1647 static int ti_download_firmware(struct ti_device *tdev,
1648 unsigned char *firmware, unsigned int firmware_size)
1649 {
1650 int status = 0;
1651 int buffer_size;
1652 int pos;
1653 int len;
1654 int done;
1655 __u8 cs = 0;
1656 __u8 *buffer;
1657 struct usb_device *dev = tdev->td_serial->dev;
1658 struct ti_firmware_header *header;
1659 unsigned int pipe = usb_sndbulkpipe(dev,
1660 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1661
1662
1663 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1664 buffer = kmalloc(buffer_size, GFP_KERNEL);
1665 if (!buffer) {
1666 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
1667 return -ENOMEM;
1668 }
1669
1670 memcpy(buffer, firmware, firmware_size);
1671 memset(buffer+firmware_size, 0xff, buffer_size-firmware_size);
1672
1673 for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++)
1674 cs = (__u8)(cs + buffer[pos]);
1675
1676 header = (struct ti_firmware_header *)buffer;
1677 header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header)));
1678 header->bCheckSum = cs;
1679
1680 dbg("%s - downloading firmware", __FUNCTION__);
1681 for (pos = 0; pos < buffer_size; pos += done) {
1682 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1683 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000);
1684 if (status)
1685 break;
1686 }
1687
1688 kfree(buffer);
1689
1690 if (status) {
1691 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status);
1692 return status;
1693 }
1694
1695 dbg("%s - download successful", __FUNCTION__);
1696
1697 return 0;
1698 }
1699
1700
1701 /* Circular Buffer Functions */
1702
1703 /*
1704 * ti_buf_alloc
1705 *
1706 * Allocate a circular buffer and all associated memory.
1707 */
1708
1709 static struct circ_buf *ti_buf_alloc(void)
1710 {
1711 struct circ_buf *cb;
1712
1713 cb = (struct circ_buf *)kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1714 if (cb == NULL)
1715 return NULL;
1716
1717 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1718 if (cb->buf == NULL) {
1719 kfree(cb);
1720 return NULL;
1721 }
1722
1723 ti_buf_clear(cb);
1724
1725 return cb;
1726 }
1727
1728
1729 /*
1730 * ti_buf_free
1731 *
1732 * Free the buffer and all associated memory.
1733 */
1734
1735 static void ti_buf_free(struct circ_buf *cb)
1736 {
1737 kfree(cb->buf);
1738 kfree(cb);
1739 }
1740
1741
1742 /*
1743 * ti_buf_clear
1744 *
1745 * Clear out all data in the circular buffer.
1746 */
1747
1748 static void ti_buf_clear(struct circ_buf *cb)
1749 {
1750 cb->head = cb->tail = 0;
1751 }
1752
1753
1754 /*
1755 * ti_buf_data_avail
1756 *
1757 * Return the number of bytes of data available in the circular
1758 * buffer.
1759 */
1760
1761 static int ti_buf_data_avail(struct circ_buf *cb)
1762 {
1763 return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1764 }
1765
1766
1767 /*
1768 * ti_buf_space_avail
1769 *
1770 * Return the number of bytes of space available in the circular
1771 * buffer.
1772 */
1773
1774 static int ti_buf_space_avail(struct circ_buf *cb)
1775 {
1776 return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1777 }
1778
1779
1780 /*
1781 * ti_buf_put
1782 *
1783 * Copy data data from a user buffer and put it into the circular buffer.
1784 * Restrict to the amount of space available.
1785 *
1786 * Return the number of bytes copied.
1787 */
1788
1789 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1790 {
1791 int c, ret = 0;
1792
1793 while (1) {
1794 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1795 if (count < c)
1796 c = count;
1797 if (c <= 0)
1798 break;
1799 memcpy(cb->buf + cb->head, buf, c);
1800 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1801 buf += c;
1802 count -= c;
1803 ret += c;
1804 }
1805
1806 return ret;
1807 }
1808
1809
1810 /*
1811 * ti_buf_get
1812 *
1813 * Get data from the circular buffer and copy to the given buffer.
1814 * Restrict to the amount of data available.
1815 *
1816 * Return the number of bytes copied.
1817 */
1818
1819 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1820 {
1821 int c, ret = 0;
1822
1823 while (1) {
1824 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1825 if (count < c)
1826 c = count;
1827 if (c <= 0)
1828 break;
1829 memcpy(buf, cb->buf + cb->tail, c);
1830 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1831 buf += c;
1832 count -= c;
1833 ret += c;
1834 }
1835
1836 return ret;
1837 }
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