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usb-serial: ti_usb, TI ez430 development tool ID
[deliverable/linux.git] / drivers / usb / serial / ti_usb_3410_5052.c
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 <asm/uaccess.h>
84 #include <asm/semaphore.h>
85 #include <linux/usb.h>
86 #include <linux/usb/serial.h>
87
88 #include "ti_usb_3410_5052.h"
89 #include "ti_fw_3410.h" /* firmware image for 3410 */
90 #include "ti_fw_5052.h" /* firmware image for 5052 */
91
92
93 /* Defines */
94
95 #define TI_DRIVER_VERSION "v0.9"
96 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
97 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
98
99 #define TI_FIRMWARE_BUF_SIZE 16284
100
101 #define TI_WRITE_BUF_SIZE 1024
102
103 #define TI_TRANSFER_TIMEOUT 2
104
105 #define TI_DEFAULT_LOW_LATENCY 0
106 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
107
108 /* supported setserial flags */
109 #define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY)
110
111 /* read urb states */
112 #define TI_READ_URB_RUNNING 0
113 #define TI_READ_URB_STOPPING 1
114 #define TI_READ_URB_STOPPED 2
115
116 #define TI_EXTRA_VID_PID_COUNT 5
117
118
119 /* Structures */
120
121 struct ti_port {
122 int tp_is_open;
123 __u8 tp_msr;
124 __u8 tp_lsr;
125 __u8 tp_shadow_mcr;
126 __u8 tp_uart_mode; /* 232 or 485 modes */
127 unsigned int tp_uart_base_addr;
128 int tp_flags;
129 int tp_closing_wait;/* in .01 secs */
130 struct async_icount tp_icount;
131 wait_queue_head_t tp_msr_wait; /* wait for msr change */
132 wait_queue_head_t tp_write_wait;
133 struct ti_device *tp_tdev;
134 struct usb_serial_port *tp_port;
135 spinlock_t tp_lock;
136 int tp_read_urb_state;
137 int tp_write_urb_in_use;
138 struct circ_buf *tp_write_buf;
139 };
140
141 struct ti_device {
142 struct semaphore td_open_close_sem;
143 int td_open_port_count;
144 struct usb_serial *td_serial;
145 int td_is_3410;
146 int td_urb_error;
147 };
148
149
150 /* Function Declarations */
151
152 static int ti_startup(struct usb_serial *serial);
153 static void ti_shutdown(struct usb_serial *serial);
154 static int ti_open(struct usb_serial_port *port, struct file *file);
155 static void ti_close(struct usb_serial_port *port, struct file *file);
156 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
157 int count);
158 static int ti_write_room(struct usb_serial_port *port);
159 static int ti_chars_in_buffer(struct usb_serial_port *port);
160 static void ti_throttle(struct usb_serial_port *port);
161 static void ti_unthrottle(struct usb_serial_port *port);
162 static int ti_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
163 static void ti_set_termios(struct usb_serial_port *port,
164 struct termios *old_termios);
165 static int ti_tiocmget(struct usb_serial_port *port, struct file *file);
166 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
167 unsigned int set, unsigned int clear);
168 static void ti_break(struct usb_serial_port *port, int break_state);
169 static void ti_interrupt_callback(struct urb *urb);
170 static void ti_bulk_in_callback(struct urb *urb);
171 static void ti_bulk_out_callback(struct urb *urb);
172
173 static void ti_recv(struct device *dev, struct tty_struct *tty,
174 unsigned char *data, int length);
175 static void ti_send(struct ti_port *tport);
176 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
177 static int ti_get_lsr(struct ti_port *tport);
178 static int ti_get_serial_info(struct ti_port *tport,
179 struct serial_struct __user *ret_arg);
180 static int ti_set_serial_info(struct ti_port *tport,
181 struct serial_struct __user *new_arg);
182 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
183
184 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
185
186 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
187 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
188
189 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
190 __u16 moduleid, __u16 value, __u8 *data, int size);
191 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
192 __u16 moduleid, __u16 value, __u8 *data, int size);
193
194 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
195 __u8 mask, __u8 byte);
196
197 static int ti_download_firmware(struct ti_device *tdev,
198 unsigned char *firmware, unsigned int firmware_size);
199
200 /* circular buffer */
201 static struct circ_buf *ti_buf_alloc(void);
202 static void ti_buf_free(struct circ_buf *cb);
203 static void ti_buf_clear(struct circ_buf *cb);
204 static int ti_buf_data_avail(struct circ_buf *cb);
205 static int ti_buf_space_avail(struct circ_buf *cb);
206 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
207 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
208
209
210 /* Data */
211
212 /* module parameters */
213 static int debug;
214 static int low_latency = TI_DEFAULT_LOW_LATENCY;
215 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
216 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
217 static int vendor_3410_count;
218 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
219 static int product_3410_count;
220 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
221 static int vendor_5052_count;
222 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
223 static int product_5052_count;
224
225 /* supported devices */
226 /* the array dimension is the number of default entries plus */
227 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
228 /* null entry */
229 static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = {
230 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
231 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_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_3410_EZ430_ID) },
244 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
245 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
246 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
247 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
248 { }
249 };
250
251 static struct usb_driver ti_usb_driver = {
252 .name = "ti_usb_3410_5052",
253 .probe = usb_serial_probe,
254 .disconnect = usb_serial_disconnect,
255 .id_table = ti_id_table_combined,
256 .no_dynamic_id = 1,
257 };
258
259 static struct usb_serial_driver ti_1port_device = {
260 .driver = {
261 .owner = THIS_MODULE,
262 .name = "ti_usb_3410_5052_1",
263 },
264 .description = "TI USB 3410 1 port adapter",
265 .id_table = ti_id_table_3410,
266 .num_interrupt_in = 1,
267 .num_bulk_in = 1,
268 .num_bulk_out = 1,
269 .num_ports = 1,
270 .attach = ti_startup,
271 .shutdown = ti_shutdown,
272 .open = ti_open,
273 .close = ti_close,
274 .write = ti_write,
275 .write_room = ti_write_room,
276 .chars_in_buffer = ti_chars_in_buffer,
277 .throttle = ti_throttle,
278 .unthrottle = ti_unthrottle,
279 .ioctl = ti_ioctl,
280 .set_termios = ti_set_termios,
281 .tiocmget = ti_tiocmget,
282 .tiocmset = ti_tiocmset,
283 .break_ctl = ti_break,
284 .read_int_callback = ti_interrupt_callback,
285 .read_bulk_callback = ti_bulk_in_callback,
286 .write_bulk_callback = ti_bulk_out_callback,
287 };
288
289 static struct usb_serial_driver ti_2port_device = {
290 .driver = {
291 .owner = THIS_MODULE,
292 .name = "ti_usb_3410_5052_2",
293 },
294 .description = "TI USB 5052 2 port adapter",
295 .id_table = ti_id_table_5052,
296 .num_interrupt_in = 1,
297 .num_bulk_in = 2,
298 .num_bulk_out = 2,
299 .num_ports = 2,
300 .attach = ti_startup,
301 .shutdown = ti_shutdown,
302 .open = ti_open,
303 .close = ti_close,
304 .write = ti_write,
305 .write_room = ti_write_room,
306 .chars_in_buffer = ti_chars_in_buffer,
307 .throttle = ti_throttle,
308 .unthrottle = ti_unthrottle,
309 .ioctl = ti_ioctl,
310 .set_termios = ti_set_termios,
311 .tiocmget = ti_tiocmget,
312 .tiocmset = ti_tiocmset,
313 .break_ctl = ti_break,
314 .read_int_callback = ti_interrupt_callback,
315 .read_bulk_callback = ti_bulk_in_callback,
316 .write_bulk_callback = ti_bulk_out_callback,
317 };
318
319
320 /* Module */
321
322 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
323 MODULE_DESCRIPTION(TI_DRIVER_DESC);
324 MODULE_VERSION(TI_DRIVER_VERSION);
325 MODULE_LICENSE("GPL");
326
327 module_param(debug, bool, S_IRUGO | S_IWUSR);
328 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
329
330 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
331 MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off");
332
333 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
334 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain in close, in .01 secs, default is 4000");
335
336 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
337 MODULE_PARM_DESC(vendor_3410, "Vendor ids for 3410 based devices, 1-5 short integers");
338 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
339 MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers");
340 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
341 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers");
342 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
343 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers");
344
345 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
346
347
348 /* Functions */
349
350 static int __init ti_init(void)
351 {
352 int i,j;
353 int ret;
354
355 /* insert extra vendor and product ids */
356 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
357 for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) {
358 ti_id_table_3410[j].idVendor = vendor_3410[i];
359 ti_id_table_3410[j].idProduct = product_3410[i];
360 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
361 }
362 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
363 for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) {
364 ti_id_table_5052[j].idVendor = vendor_5052[i];
365 ti_id_table_5052[j].idProduct = product_5052[i];
366 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
367 }
368
369 ret = usb_serial_register(&ti_1port_device);
370 if (ret)
371 goto failed_1port;
372 ret = usb_serial_register(&ti_2port_device);
373 if (ret)
374 goto failed_2port;
375
376 ret = usb_register(&ti_usb_driver);
377 if (ret)
378 goto failed_usb;
379
380 info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
381
382 return 0;
383
384 failed_usb:
385 usb_serial_deregister(&ti_2port_device);
386 failed_2port:
387 usb_serial_deregister(&ti_1port_device);
388 failed_1port:
389 return ret;
390 }
391
392
393 static void __exit ti_exit(void)
394 {
395 usb_serial_deregister(&ti_1port_device);
396 usb_serial_deregister(&ti_2port_device);
397 usb_deregister(&ti_usb_driver);
398 }
399
400
401 module_init(ti_init);
402 module_exit(ti_exit);
403
404
405 static int ti_startup(struct usb_serial *serial)
406 {
407 struct ti_device *tdev;
408 struct ti_port *tport;
409 struct usb_device *dev = serial->dev;
410 int status;
411 int i;
412
413
414 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
415 __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct),
416 dev->descriptor.bNumConfigurations,
417 dev->actconfig->desc.bConfigurationValue);
418
419 /* create device structure */
420 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
421 if (tdev == NULL) {
422 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
423 return -ENOMEM;
424 }
425 sema_init(&tdev->td_open_close_sem, 1);
426 tdev->td_serial = serial;
427 usb_set_serial_data(serial, tdev);
428
429 /* determine device type */
430 if (usb_match_id(serial->interface, ti_id_table_3410))
431 tdev->td_is_3410 = 1;
432 dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052");
433
434 /* if we have only 1 configuration, download firmware */
435 if (dev->descriptor.bNumConfigurations == 1) {
436
437 if (tdev->td_is_3410)
438 status = ti_download_firmware(tdev, ti_fw_3410,
439 sizeof(ti_fw_3410));
440 else
441 status = ti_download_firmware(tdev, ti_fw_5052,
442 sizeof(ti_fw_5052));
443 if (status)
444 goto free_tdev;
445
446 /* 3410 must be reset, 5052 resets itself */
447 if (tdev->td_is_3410) {
448 msleep_interruptible(100);
449 usb_reset_device(dev);
450 }
451
452 status = -ENODEV;
453 goto free_tdev;
454 }
455
456 /* the second configuration must be set (in sysfs by hotplug script) */
457 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
458 status = -ENODEV;
459 goto free_tdev;
460 }
461
462 /* set up port structures */
463 for (i = 0; i < serial->num_ports; ++i) {
464 tport = kmalloc(sizeof(struct ti_port), GFP_KERNEL);
465 if (tport == NULL) {
466 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
467 status = -ENOMEM;
468 goto free_tports;
469 }
470 memset(tport, 0, sizeof(struct ti_port));
471 spin_lock_init(&tport->tp_lock);
472 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
473 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
474 tport->tp_closing_wait = closing_wait;
475 init_waitqueue_head(&tport->tp_msr_wait);
476 init_waitqueue_head(&tport->tp_write_wait);
477 tport->tp_write_buf = ti_buf_alloc();
478 if (tport->tp_write_buf == NULL) {
479 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
480 kfree(tport);
481 status = -ENOMEM;
482 goto free_tports;
483 }
484 tport->tp_port = serial->port[i];
485 tport->tp_tdev = tdev;
486 usb_set_serial_port_data(serial->port[i], tport);
487 tport->tp_uart_mode = 0; /* default is RS232 */
488 }
489
490 return 0;
491
492 free_tports:
493 for (--i; i>=0; --i) {
494 tport = usb_get_serial_port_data(serial->port[i]);
495 ti_buf_free(tport->tp_write_buf);
496 kfree(tport);
497 usb_set_serial_port_data(serial->port[i], NULL);
498 }
499 free_tdev:
500 kfree(tdev);
501 usb_set_serial_data(serial, NULL);
502 return status;
503 }
504
505
506 static void ti_shutdown(struct usb_serial *serial)
507 {
508 int i;
509 struct ti_device *tdev = usb_get_serial_data(serial);
510 struct ti_port *tport;
511
512 dbg("%s", __FUNCTION__);
513
514 for (i=0; i < serial->num_ports; ++i) {
515 tport = usb_get_serial_port_data(serial->port[i]);
516 if (tport) {
517 ti_buf_free(tport->tp_write_buf);
518 kfree(tport);
519 usb_set_serial_port_data(serial->port[i], NULL);
520 }
521 }
522
523 kfree(tdev);
524 usb_set_serial_data(serial, NULL);
525 }
526
527
528 static int ti_open(struct usb_serial_port *port, struct file *file)
529 {
530 struct ti_port *tport = usb_get_serial_port_data(port);
531 struct ti_device *tdev;
532 struct usb_device *dev;
533 struct urb *urb;
534 int port_number;
535 int status;
536 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
537 TI_PIPE_TIMEOUT_ENABLE |
538 (TI_TRANSFER_TIMEOUT << 2));
539
540 dbg("%s - port %d", __FUNCTION__, port->number);
541
542 if (tport == NULL)
543 return -ENODEV;
544
545 dev = port->serial->dev;
546 tdev = tport->tp_tdev;
547
548 /* only one open on any port on a device at a time */
549 if (down_interruptible(&tdev->td_open_close_sem))
550 return -ERESTARTSYS;
551
552 if (port->tty)
553 port->tty->low_latency =
554 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
555
556 port_number = port->number - port->serial->minor;
557
558 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
559
560 tport->tp_msr = 0;
561 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
562
563 /* start interrupt urb the first time a port is opened on this device */
564 if (tdev->td_open_port_count == 0) {
565 dbg("%s - start interrupt in urb", __FUNCTION__);
566 urb = tdev->td_serial->port[0]->interrupt_in_urb;
567 if (!urb) {
568 dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__);
569 status = -EINVAL;
570 goto up_sem;
571 }
572 urb->complete = ti_interrupt_callback;
573 urb->context = tdev;
574 urb->dev = dev;
575 status = usb_submit_urb(urb, GFP_KERNEL);
576 if (status) {
577 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status);
578 goto up_sem;
579 }
580 }
581
582 ti_set_termios(port, NULL);
583
584 dbg("%s - sending TI_OPEN_PORT", __FUNCTION__);
585 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
586 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
587 if (status) {
588 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status);
589 goto unlink_int_urb;
590 }
591
592 dbg("%s - sending TI_START_PORT", __FUNCTION__);
593 status = ti_command_out_sync(tdev, TI_START_PORT,
594 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
595 if (status) {
596 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status);
597 goto unlink_int_urb;
598 }
599
600 dbg("%s - sending TI_PURGE_PORT", __FUNCTION__);
601 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
602 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
603 if (status) {
604 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status);
605 goto unlink_int_urb;
606 }
607 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
608 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
609 if (status) {
610 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status);
611 goto unlink_int_urb;
612 }
613
614 /* reset the data toggle on the bulk endpoints to work around bug in
615 * host controllers where things get out of sync some times */
616 usb_clear_halt(dev, port->write_urb->pipe);
617 usb_clear_halt(dev, port->read_urb->pipe);
618
619 ti_set_termios(port, NULL);
620
621 dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__);
622 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
623 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
624 if (status) {
625 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status);
626 goto unlink_int_urb;
627 }
628
629 dbg("%s - sending TI_START_PORT (2)", __FUNCTION__);
630 status = ti_command_out_sync(tdev, TI_START_PORT,
631 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
632 if (status) {
633 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status);
634 goto unlink_int_urb;
635 }
636
637 /* start read urb */
638 dbg("%s - start read urb", __FUNCTION__);
639 urb = port->read_urb;
640 if (!urb) {
641 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__);
642 status = -EINVAL;
643 goto unlink_int_urb;
644 }
645 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
646 urb->complete = ti_bulk_in_callback;
647 urb->context = tport;
648 urb->dev = dev;
649 status = usb_submit_urb(urb, GFP_KERNEL);
650 if (status) {
651 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status);
652 goto unlink_int_urb;
653 }
654
655 tport->tp_is_open = 1;
656 ++tdev->td_open_port_count;
657
658 goto up_sem;
659
660 unlink_int_urb:
661 if (tdev->td_open_port_count == 0)
662 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
663 up_sem:
664 up(&tdev->td_open_close_sem);
665 dbg("%s - exit %d", __FUNCTION__, status);
666 return status;
667 }
668
669
670 static void ti_close(struct usb_serial_port *port, struct file *file)
671 {
672 struct ti_device *tdev;
673 struct ti_port *tport;
674 int port_number;
675 int status;
676 int do_up;
677
678 dbg("%s - port %d", __FUNCTION__, port->number);
679
680 tdev = usb_get_serial_data(port->serial);
681 tport = usb_get_serial_port_data(port);
682 if (tdev == NULL || tport == NULL)
683 return;
684
685 tport->tp_is_open = 0;
686
687 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
688
689 usb_kill_urb(port->read_urb);
690 usb_kill_urb(port->write_urb);
691 tport->tp_write_urb_in_use = 0;
692
693 port_number = port->number - port->serial->minor;
694
695 dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__);
696 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
697 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
698 if (status)
699 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status);
700
701 /* if down is interrupted, continue anyway */
702 do_up = !down_interruptible(&tdev->td_open_close_sem);
703 --tport->tp_tdev->td_open_port_count;
704 if (tport->tp_tdev->td_open_port_count <= 0) {
705 /* last port is closed, shut down interrupt urb */
706 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
707 tport->tp_tdev->td_open_port_count = 0;
708 }
709 if (do_up)
710 up(&tdev->td_open_close_sem);
711
712 dbg("%s - exit", __FUNCTION__);
713 }
714
715
716 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
717 int count)
718 {
719 struct ti_port *tport = usb_get_serial_port_data(port);
720 unsigned long flags;
721
722 dbg("%s - port %d", __FUNCTION__, port->number);
723
724 if (count == 0) {
725 dbg("%s - write request of 0 bytes", __FUNCTION__);
726 return 0;
727 }
728
729 if (tport == NULL || !tport->tp_is_open)
730 return -ENODEV;
731
732 spin_lock_irqsave(&tport->tp_lock, flags);
733 count = ti_buf_put(tport->tp_write_buf, data, count);
734 spin_unlock_irqrestore(&tport->tp_lock, flags);
735
736 ti_send(tport);
737
738 return count;
739 }
740
741
742 static int ti_write_room(struct usb_serial_port *port)
743 {
744 struct ti_port *tport = usb_get_serial_port_data(port);
745 int room = 0;
746 unsigned long flags;
747
748 dbg("%s - port %d", __FUNCTION__, port->number);
749
750 if (tport == NULL)
751 return -ENODEV;
752
753 spin_lock_irqsave(&tport->tp_lock, flags);
754 room = ti_buf_space_avail(tport->tp_write_buf);
755 spin_unlock_irqrestore(&tport->tp_lock, flags);
756
757 dbg("%s - returns %d", __FUNCTION__, room);
758 return room;
759 }
760
761
762 static int ti_chars_in_buffer(struct usb_serial_port *port)
763 {
764 struct ti_port *tport = usb_get_serial_port_data(port);
765 int chars = 0;
766 unsigned long flags;
767
768 dbg("%s - port %d", __FUNCTION__, port->number);
769
770 if (tport == NULL)
771 return -ENODEV;
772
773 spin_lock_irqsave(&tport->tp_lock, flags);
774 chars = ti_buf_data_avail(tport->tp_write_buf);
775 spin_unlock_irqrestore(&tport->tp_lock, flags);
776
777 dbg("%s - returns %d", __FUNCTION__, chars);
778 return chars;
779 }
780
781
782 static void ti_throttle(struct usb_serial_port *port)
783 {
784 struct ti_port *tport = usb_get_serial_port_data(port);
785 struct tty_struct *tty;
786
787 dbg("%s - port %d", __FUNCTION__, port->number);
788
789 if (tport == NULL)
790 return;
791
792 tty = port->tty;
793 if (!tty) {
794 dbg("%s - no tty", __FUNCTION__);
795 return;
796 }
797
798 if (I_IXOFF(tty) || C_CRTSCTS(tty))
799 ti_stop_read(tport, tty);
800
801 }
802
803
804 static void ti_unthrottle(struct usb_serial_port *port)
805 {
806 struct ti_port *tport = usb_get_serial_port_data(port);
807 struct tty_struct *tty;
808 int status;
809
810 dbg("%s - port %d", __FUNCTION__, port->number);
811
812 if (tport == NULL)
813 return;
814
815 tty = port->tty;
816 if (!tty) {
817 dbg("%s - no tty", __FUNCTION__);
818 return;
819 }
820
821 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
822 status = ti_restart_read(tport, tty);
823 if (status)
824 dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status);
825 }
826 }
827
828
829 static int ti_ioctl(struct usb_serial_port *port, struct file *file,
830 unsigned int cmd, unsigned long arg)
831 {
832 struct ti_port *tport = usb_get_serial_port_data(port);
833 struct async_icount cnow;
834 struct async_icount cprev;
835
836 dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd);
837
838 if (tport == NULL)
839 return -ENODEV;
840
841 switch (cmd) {
842 case TIOCGSERIAL:
843 dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
844 return ti_get_serial_info(tport, (struct serial_struct __user *)arg);
845 break;
846
847 case TIOCSSERIAL:
848 dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
849 return ti_set_serial_info(tport, (struct serial_struct __user *)arg);
850 break;
851
852 case TIOCMIWAIT:
853 dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
854 cprev = tport->tp_icount;
855 while (1) {
856 interruptible_sleep_on(&tport->tp_msr_wait);
857 if (signal_pending(current))
858 return -ERESTARTSYS;
859 cnow = tport->tp_icount;
860 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
861 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
862 return -EIO; /* no change => error */
863 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
864 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
865 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
866 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
867 return 0;
868 }
869 cprev = cnow;
870 }
871 break;
872
873 case TIOCGICOUNT:
874 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx);
875 if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount)))
876 return -EFAULT;
877 return 0;
878 }
879
880 return -ENOIOCTLCMD;
881 }
882
883
884 static void ti_set_termios(struct usb_serial_port *port,
885 struct termios *old_termios)
886 {
887 struct ti_port *tport = usb_get_serial_port_data(port);
888 struct tty_struct *tty = port->tty;
889 struct ti_uart_config *config;
890 tcflag_t cflag,iflag;
891 int baud;
892 int status;
893 int port_number = port->number - port->serial->minor;
894 unsigned int mcr;
895
896 dbg("%s - port %d", __FUNCTION__, port->number);
897
898 if (!tty || !tty->termios) {
899 dbg("%s - no tty or termios", __FUNCTION__);
900 return;
901 }
902
903 cflag = tty->termios->c_cflag;
904 iflag = tty->termios->c_iflag;
905
906 if (old_termios && cflag == old_termios->c_cflag
907 && iflag == old_termios->c_iflag) {
908 dbg("%s - nothing to change", __FUNCTION__);
909 return;
910 }
911
912 dbg("%s - clfag %08x, iflag %08x", __FUNCTION__, cflag, iflag);
913
914 if (old_termios)
915 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag);
916
917 if (tport == NULL)
918 return;
919
920 config = kmalloc(sizeof(*config), GFP_KERNEL);
921 if (!config) {
922 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
923 return;
924 }
925
926 config->wFlags = 0;
927
928 /* these flags must be set */
929 config->wFlags |= TI_UART_ENABLE_MS_INTS;
930 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
931 config->bUartMode = (__u8)(tport->tp_uart_mode);
932
933 switch (cflag & CSIZE) {
934 case CS5:
935 config->bDataBits = TI_UART_5_DATA_BITS;
936 break;
937 case CS6:
938 config->bDataBits = TI_UART_6_DATA_BITS;
939 break;
940 case CS7:
941 config->bDataBits = TI_UART_7_DATA_BITS;
942 break;
943 default:
944 case CS8:
945 config->bDataBits = TI_UART_8_DATA_BITS;
946 break;
947 }
948
949 if (cflag & PARENB) {
950 if (cflag & PARODD) {
951 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
952 config->bParity = TI_UART_ODD_PARITY;
953 } else {
954 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
955 config->bParity = TI_UART_EVEN_PARITY;
956 }
957 } else {
958 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
959 config->bParity = TI_UART_NO_PARITY;
960 }
961
962 if (cflag & CSTOPB)
963 config->bStopBits = TI_UART_2_STOP_BITS;
964 else
965 config->bStopBits = TI_UART_1_STOP_BITS;
966
967 if (cflag & CRTSCTS) {
968 /* RTS flow control must be off to drop RTS for baud rate B0 */
969 if ((cflag & CBAUD) != B0)
970 config->wFlags |= TI_UART_ENABLE_RTS_IN;
971 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
972 } else {
973 tty->hw_stopped = 0;
974 ti_restart_read(tport, tty);
975 }
976
977 if (I_IXOFF(tty) || I_IXON(tty)) {
978 config->cXon = START_CHAR(tty);
979 config->cXoff = STOP_CHAR(tty);
980
981 if (I_IXOFF(tty))
982 config->wFlags |= TI_UART_ENABLE_X_IN;
983 else
984 ti_restart_read(tport, tty);
985
986 if (I_IXON(tty))
987 config->wFlags |= TI_UART_ENABLE_X_OUT;
988 }
989
990 baud = tty_get_baud_rate(tty);
991 if (!baud) baud = 9600;
992 if (tport->tp_tdev->td_is_3410)
993 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
994 else
995 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
996
997 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
998 __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
999
1000 cpu_to_be16s(&config->wBaudRate);
1001 cpu_to_be16s(&config->wFlags);
1002
1003 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1004 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1005 sizeof(*config));
1006 if (status)
1007 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status);
1008
1009 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1010 mcr = tport->tp_shadow_mcr;
1011 /* if baud rate is B0, clear RTS and DTR */
1012 if ((cflag & CBAUD) == B0)
1013 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1014 status = ti_set_mcr(tport, mcr);
1015 if (status)
1016 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status);
1017
1018 kfree(config);
1019 }
1020
1021
1022 static int ti_tiocmget(struct usb_serial_port *port, struct file *file)
1023 {
1024 struct ti_port *tport = usb_get_serial_port_data(port);
1025 unsigned int result;
1026 unsigned int msr;
1027 unsigned int mcr;
1028
1029 dbg("%s - port %d", __FUNCTION__, port->number);
1030
1031 if (tport == NULL)
1032 return -ENODEV;
1033
1034 msr = tport->tp_msr;
1035 mcr = tport->tp_shadow_mcr;
1036
1037 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1038 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1039 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1040 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1041 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1042 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1043 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1044
1045 dbg("%s - 0x%04X", __FUNCTION__, result);
1046
1047 return result;
1048 }
1049
1050
1051 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
1052 unsigned int set, unsigned int clear)
1053 {
1054 struct ti_port *tport = usb_get_serial_port_data(port);
1055 unsigned int mcr;
1056
1057 dbg("%s - port %d", __FUNCTION__, port->number);
1058
1059 if (tport == NULL)
1060 return -ENODEV;
1061
1062 mcr = tport->tp_shadow_mcr;
1063
1064 if (set & TIOCM_RTS)
1065 mcr |= TI_MCR_RTS;
1066 if (set & TIOCM_DTR)
1067 mcr |= TI_MCR_DTR;
1068 if (set & TIOCM_LOOP)
1069 mcr |= TI_MCR_LOOP;
1070
1071 if (clear & TIOCM_RTS)
1072 mcr &= ~TI_MCR_RTS;
1073 if (clear & TIOCM_DTR)
1074 mcr &= ~TI_MCR_DTR;
1075 if (clear & TIOCM_LOOP)
1076 mcr &= ~TI_MCR_LOOP;
1077
1078 return ti_set_mcr(tport, mcr);
1079 }
1080
1081
1082 static void ti_break(struct usb_serial_port *port, int break_state)
1083 {
1084 struct ti_port *tport = usb_get_serial_port_data(port);
1085 int status;
1086
1087 dbg("%s - state = %d", __FUNCTION__, break_state);
1088
1089 if (tport == NULL)
1090 return;
1091
1092 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1093
1094 status = ti_write_byte(tport->tp_tdev,
1095 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1096 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1097
1098 if (status)
1099 dbg("%s - error setting break, %d", __FUNCTION__, status);
1100 }
1101
1102
1103 static void ti_interrupt_callback(struct urb *urb)
1104 {
1105 struct ti_device *tdev = (struct ti_device *)urb->context;
1106 struct usb_serial_port *port;
1107 struct usb_serial *serial = tdev->td_serial;
1108 struct ti_port *tport;
1109 struct device *dev = &urb->dev->dev;
1110 unsigned char *data = urb->transfer_buffer;
1111 int length = urb->actual_length;
1112 int port_number;
1113 int function;
1114 int status;
1115 __u8 msr;
1116
1117 dbg("%s", __FUNCTION__);
1118
1119 switch (urb->status) {
1120 case 0:
1121 break;
1122 case -ECONNRESET:
1123 case -ENOENT:
1124 case -ESHUTDOWN:
1125 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1126 tdev->td_urb_error = 1;
1127 return;
1128 default:
1129 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1130 tdev->td_urb_error = 1;
1131 goto exit;
1132 }
1133
1134 if (length != 2) {
1135 dbg("%s - bad packet size, %d", __FUNCTION__, length);
1136 goto exit;
1137 }
1138
1139 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1140 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]);
1141 goto exit;
1142 }
1143
1144 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1145 function = TI_GET_FUNC_FROM_CODE(data[0]);
1146
1147 dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]);
1148
1149 if (port_number >= serial->num_ports) {
1150 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number);
1151 goto exit;
1152 }
1153
1154 port = serial->port[port_number];
1155
1156 tport = usb_get_serial_port_data(port);
1157 if (!tport)
1158 goto exit;
1159
1160 switch (function) {
1161 case TI_CODE_DATA_ERROR:
1162 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]);
1163 break;
1164
1165 case TI_CODE_MODEM_STATUS:
1166 msr = data[1];
1167 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr);
1168 ti_handle_new_msr(tport, msr);
1169 break;
1170
1171 default:
1172 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]);
1173 break;
1174 }
1175
1176 exit:
1177 status = usb_submit_urb(urb, GFP_ATOMIC);
1178 if (status)
1179 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", __FUNCTION__, status);
1180 }
1181
1182
1183 static void ti_bulk_in_callback(struct urb *urb)
1184 {
1185 struct ti_port *tport = (struct ti_port *)urb->context;
1186 struct usb_serial_port *port = tport->tp_port;
1187 struct device *dev = &urb->dev->dev;
1188 int status = 0;
1189
1190 dbg("%s", __FUNCTION__);
1191
1192 switch (urb->status) {
1193 case 0:
1194 break;
1195 case -ECONNRESET:
1196 case -ENOENT:
1197 case -ESHUTDOWN:
1198 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1199 tport->tp_tdev->td_urb_error = 1;
1200 wake_up_interruptible(&tport->tp_write_wait);
1201 return;
1202 default:
1203 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status );
1204 tport->tp_tdev->td_urb_error = 1;
1205 wake_up_interruptible(&tport->tp_write_wait);
1206 }
1207
1208 if (urb->status == -EPIPE)
1209 goto exit;
1210
1211 if (urb->status) {
1212 dev_err(dev, "%s - stopping read!\n", __FUNCTION__);
1213 return;
1214 }
1215
1216 if (port->tty && urb->actual_length) {
1217 usb_serial_debug_data(debug, dev, __FUNCTION__,
1218 urb->actual_length, urb->transfer_buffer);
1219
1220 if (!tport->tp_is_open)
1221 dbg("%s - port closed, dropping data", __FUNCTION__);
1222 else
1223 ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer,
1224 urb->actual_length);
1225
1226 spin_lock(&tport->tp_lock);
1227 tport->tp_icount.rx += urb->actual_length;
1228 spin_unlock(&tport->tp_lock);
1229 }
1230
1231 exit:
1232 /* continue to read unless stopping */
1233 spin_lock(&tport->tp_lock);
1234 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1235 urb->dev = port->serial->dev;
1236 status = usb_submit_urb(urb, GFP_ATOMIC);
1237 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1238 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1239 }
1240 spin_unlock(&tport->tp_lock);
1241 if (status)
1242 dev_err(dev, "%s - resubmit read urb failed, %d\n", __FUNCTION__, status);
1243 }
1244
1245
1246 static void ti_bulk_out_callback(struct urb *urb)
1247 {
1248 struct ti_port *tport = (struct ti_port *)urb->context;
1249 struct usb_serial_port *port = tport->tp_port;
1250 struct device *dev = &urb->dev->dev;
1251
1252 dbg("%s - port %d", __FUNCTION__, port->number);
1253
1254 tport->tp_write_urb_in_use = 0;
1255
1256 switch (urb->status) {
1257 case 0:
1258 break;
1259 case -ECONNRESET:
1260 case -ENOENT:
1261 case -ESHUTDOWN:
1262 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1263 tport->tp_tdev->td_urb_error = 1;
1264 wake_up_interruptible(&tport->tp_write_wait);
1265 return;
1266 default:
1267 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1268 tport->tp_tdev->td_urb_error = 1;
1269 wake_up_interruptible(&tport->tp_write_wait);
1270 }
1271
1272 /* send any buffered data */
1273 ti_send(tport);
1274 }
1275
1276
1277 static void ti_recv(struct device *dev, struct tty_struct *tty,
1278 unsigned char *data, int length)
1279 {
1280 int cnt;
1281
1282 do {
1283 cnt = tty_buffer_request_room(tty, length);
1284 if (cnt < length) {
1285 dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length - cnt);
1286 if(cnt == 0)
1287 break;
1288 }
1289 tty_insert_flip_string(tty, data, cnt);
1290 tty_flip_buffer_push(tty);
1291 data += cnt;
1292 length -= cnt;
1293 } while (length > 0);
1294
1295 }
1296
1297
1298 static void ti_send(struct ti_port *tport)
1299 {
1300 int count, result;
1301 struct usb_serial_port *port = tport->tp_port;
1302 struct tty_struct *tty = port->tty;
1303 unsigned long flags;
1304
1305
1306 dbg("%s - port %d", __FUNCTION__, port->number);
1307
1308 spin_lock_irqsave(&tport->tp_lock, flags);
1309
1310 if (tport->tp_write_urb_in_use) {
1311 spin_unlock_irqrestore(&tport->tp_lock, flags);
1312 return;
1313 }
1314
1315 count = ti_buf_get(tport->tp_write_buf,
1316 port->write_urb->transfer_buffer,
1317 port->bulk_out_size);
1318
1319 if (count == 0) {
1320 spin_unlock_irqrestore(&tport->tp_lock, flags);
1321 return;
1322 }
1323
1324 tport->tp_write_urb_in_use = 1;
1325
1326 spin_unlock_irqrestore(&tport->tp_lock, flags);
1327
1328 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
1329
1330 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1331 usb_sndbulkpipe(port->serial->dev,
1332 port->bulk_out_endpointAddress),
1333 port->write_urb->transfer_buffer, count,
1334 ti_bulk_out_callback, tport);
1335
1336 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1337 if (result) {
1338 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result);
1339 tport->tp_write_urb_in_use = 0;
1340 /* TODO: reschedule ti_send */
1341 } else {
1342 spin_lock_irqsave(&tport->tp_lock, flags);
1343 tport->tp_icount.tx += count;
1344 spin_unlock_irqrestore(&tport->tp_lock, flags);
1345 }
1346
1347 /* more room in the buffer for new writes, wakeup */
1348 if (tty)
1349 tty_wakeup(tty);
1350 wake_up_interruptible(&tport->tp_write_wait);
1351 }
1352
1353
1354 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1355 {
1356 int status;
1357
1358 status = ti_write_byte(tport->tp_tdev,
1359 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1360 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1361
1362 if (!status)
1363 tport->tp_shadow_mcr = mcr;
1364
1365 return status;
1366 }
1367
1368
1369 static int ti_get_lsr(struct ti_port *tport)
1370 {
1371 int size,status;
1372 struct ti_device *tdev = tport->tp_tdev;
1373 struct usb_serial_port *port = tport->tp_port;
1374 int port_number = port->number - port->serial->minor;
1375 struct ti_port_status *data;
1376
1377 dbg("%s - port %d", __FUNCTION__, port->number);
1378
1379 size = sizeof(struct ti_port_status);
1380 data = kmalloc(size, GFP_KERNEL);
1381 if (!data) {
1382 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
1383 return -ENOMEM;
1384 }
1385
1386 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1387 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1388 if (status) {
1389 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status);
1390 goto free_data;
1391 }
1392
1393 dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR);
1394
1395 tport->tp_lsr = data->bLSR;
1396
1397 free_data:
1398 kfree(data);
1399 return status;
1400 }
1401
1402
1403 static int ti_get_serial_info(struct ti_port *tport,
1404 struct serial_struct __user *ret_arg)
1405 {
1406 struct usb_serial_port *port = tport->tp_port;
1407 struct serial_struct ret_serial;
1408
1409 if (!ret_arg)
1410 return -EFAULT;
1411
1412 memset(&ret_serial, 0, sizeof(ret_serial));
1413
1414 ret_serial.type = PORT_16550A;
1415 ret_serial.line = port->serial->minor;
1416 ret_serial.port = port->number - port->serial->minor;
1417 ret_serial.flags = tport->tp_flags;
1418 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1419 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1420 ret_serial.closing_wait = tport->tp_closing_wait;
1421
1422 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1423 return -EFAULT;
1424
1425 return 0;
1426 }
1427
1428
1429 static int ti_set_serial_info(struct ti_port *tport,
1430 struct serial_struct __user *new_arg)
1431 {
1432 struct usb_serial_port *port = tport->tp_port;
1433 struct serial_struct new_serial;
1434
1435 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1436 return -EFAULT;
1437
1438 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1439 if (port->tty)
1440 port->tty->low_latency =
1441 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1442 tport->tp_closing_wait = new_serial.closing_wait;
1443
1444 return 0;
1445 }
1446
1447
1448 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1449 {
1450 struct async_icount *icount;
1451 struct tty_struct *tty;
1452 unsigned long flags;
1453
1454 dbg("%s - msr 0x%02X", __FUNCTION__, msr);
1455
1456 if (msr & TI_MSR_DELTA_MASK) {
1457 spin_lock_irqsave(&tport->tp_lock, flags);
1458 icount = &tport->tp_icount;
1459 if (msr & TI_MSR_DELTA_CTS)
1460 icount->cts++;
1461 if (msr & TI_MSR_DELTA_DSR)
1462 icount->dsr++;
1463 if (msr & TI_MSR_DELTA_CD)
1464 icount->dcd++;
1465 if (msr & TI_MSR_DELTA_RI)
1466 icount->rng++;
1467 wake_up_interruptible(&tport->tp_msr_wait);
1468 spin_unlock_irqrestore(&tport->tp_lock, flags);
1469 }
1470
1471 tport->tp_msr = msr & TI_MSR_MASK;
1472
1473 /* handle CTS flow control */
1474 tty = tport->tp_port->tty;
1475 if (tty && C_CRTSCTS(tty)) {
1476 if (msr & TI_MSR_CTS) {
1477 tty->hw_stopped = 0;
1478 tty_wakeup(tty);
1479 } else {
1480 tty->hw_stopped = 1;
1481 }
1482 }
1483 }
1484
1485
1486 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1487 {
1488 struct ti_device *tdev = tport->tp_tdev;
1489 struct usb_serial_port *port = tport->tp_port;
1490 wait_queue_t wait;
1491 unsigned long flags;
1492
1493 dbg("%s - port %d", __FUNCTION__, port->number);
1494
1495 spin_lock_irqsave(&tport->tp_lock, flags);
1496
1497 /* wait for data to drain from the buffer */
1498 tdev->td_urb_error = 0;
1499 init_waitqueue_entry(&wait, current);
1500 add_wait_queue(&tport->tp_write_wait, &wait);
1501 for (;;) {
1502 set_current_state(TASK_INTERRUPTIBLE);
1503 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1504 || timeout == 0 || signal_pending(current)
1505 || tdev->td_urb_error
1506 || !usb_get_intfdata(port->serial->interface)) /* disconnect */
1507 break;
1508 spin_unlock_irqrestore(&tport->tp_lock, flags);
1509 timeout = schedule_timeout(timeout);
1510 spin_lock_irqsave(&tport->tp_lock, flags);
1511 }
1512 set_current_state(TASK_RUNNING);
1513 remove_wait_queue(&tport->tp_write_wait, &wait);
1514
1515 /* flush any remaining data in the buffer */
1516 if (flush)
1517 ti_buf_clear(tport->tp_write_buf);
1518
1519 spin_unlock_irqrestore(&tport->tp_lock, flags);
1520
1521 /* wait for data to drain from the device */
1522 /* wait for empty tx register, plus 20 ms */
1523 timeout += jiffies;
1524 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1525 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1526 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1527 && usb_get_intfdata(port->serial->interface)) { /* not disconnected */
1528 if (ti_get_lsr(tport))
1529 break;
1530 msleep_interruptible(20);
1531 }
1532 }
1533
1534
1535 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1536 {
1537 unsigned long flags;
1538
1539 spin_lock_irqsave(&tport->tp_lock, flags);
1540
1541 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1542 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1543
1544 spin_unlock_irqrestore(&tport->tp_lock, flags);
1545 }
1546
1547
1548 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1549 {
1550 struct urb *urb;
1551 int status = 0;
1552 unsigned long flags;
1553
1554 spin_lock_irqsave(&tport->tp_lock, flags);
1555
1556 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1557 urb = tport->tp_port->read_urb;
1558 urb->complete = ti_bulk_in_callback;
1559 urb->context = tport;
1560 urb->dev = tport->tp_port->serial->dev;
1561 status = usb_submit_urb(urb, GFP_KERNEL);
1562 }
1563 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1564
1565 spin_unlock_irqrestore(&tport->tp_lock, flags);
1566
1567 return status;
1568 }
1569
1570
1571 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1572 __u16 moduleid, __u16 value, __u8 *data, int size)
1573 {
1574 int status;
1575
1576 status = usb_control_msg(tdev->td_serial->dev,
1577 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1578 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1579 value, moduleid, data, size, 1000);
1580
1581 if (status == size)
1582 status = 0;
1583
1584 if (status > 0)
1585 status = -ECOMM;
1586
1587 return status;
1588 }
1589
1590
1591 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1592 __u16 moduleid, __u16 value, __u8 *data, int size)
1593 {
1594 int status;
1595
1596 status = usb_control_msg(tdev->td_serial->dev,
1597 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1598 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1599 value, moduleid, data, size, 1000);
1600
1601 if (status == size)
1602 status = 0;
1603
1604 if (status > 0)
1605 status = -ECOMM;
1606
1607 return status;
1608 }
1609
1610
1611 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1612 __u8 mask, __u8 byte)
1613 {
1614 int status;
1615 unsigned int size;
1616 struct ti_write_data_bytes *data;
1617 struct device *dev = &tdev->td_serial->dev->dev;
1618
1619 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte);
1620
1621 size = sizeof(struct ti_write_data_bytes) + 2;
1622 data = kmalloc(size, GFP_KERNEL);
1623 if (!data) {
1624 dev_err(dev, "%s - out of memory\n", __FUNCTION__);
1625 return -ENOMEM;
1626 }
1627
1628 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1629 data->bDataType = TI_RW_DATA_BYTE;
1630 data->bDataCounter = 1;
1631 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1632 data->wBaseAddrLo = cpu_to_be16(addr);
1633 data->bData[0] = mask;
1634 data->bData[1] = byte;
1635
1636 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1637 (__u8 *)data, size);
1638
1639 if (status < 0)
1640 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status);
1641
1642 kfree(data);
1643
1644 return status;
1645 }
1646
1647
1648 static int ti_download_firmware(struct ti_device *tdev,
1649 unsigned char *firmware, unsigned int firmware_size)
1650 {
1651 int status = 0;
1652 int buffer_size;
1653 int pos;
1654 int len;
1655 int done;
1656 __u8 cs = 0;
1657 __u8 *buffer;
1658 struct usb_device *dev = tdev->td_serial->dev;
1659 struct ti_firmware_header *header;
1660 unsigned int pipe = usb_sndbulkpipe(dev,
1661 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1662
1663
1664 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1665 buffer = kmalloc(buffer_size, GFP_KERNEL);
1666 if (!buffer) {
1667 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
1668 return -ENOMEM;
1669 }
1670
1671 memcpy(buffer, firmware, firmware_size);
1672 memset(buffer+firmware_size, 0xff, buffer_size-firmware_size);
1673
1674 for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++)
1675 cs = (__u8)(cs + buffer[pos]);
1676
1677 header = (struct ti_firmware_header *)buffer;
1678 header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header)));
1679 header->bCheckSum = cs;
1680
1681 dbg("%s - downloading firmware", __FUNCTION__);
1682 for (pos = 0; pos < buffer_size; pos += done) {
1683 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1684 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000);
1685 if (status)
1686 break;
1687 }
1688
1689 kfree(buffer);
1690
1691 if (status) {
1692 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status);
1693 return status;
1694 }
1695
1696 dbg("%s - download successful", __FUNCTION__);
1697
1698 return 0;
1699 }
1700
1701
1702 /* Circular Buffer Functions */
1703
1704 /*
1705 * ti_buf_alloc
1706 *
1707 * Allocate a circular buffer and all associated memory.
1708 */
1709
1710 static struct circ_buf *ti_buf_alloc(void)
1711 {
1712 struct circ_buf *cb;
1713
1714 cb = (struct circ_buf *)kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1715 if (cb == NULL)
1716 return NULL;
1717
1718 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1719 if (cb->buf == NULL) {
1720 kfree(cb);
1721 return NULL;
1722 }
1723
1724 ti_buf_clear(cb);
1725
1726 return cb;
1727 }
1728
1729
1730 /*
1731 * ti_buf_free
1732 *
1733 * Free the buffer and all associated memory.
1734 */
1735
1736 static void ti_buf_free(struct circ_buf *cb)
1737 {
1738 kfree(cb->buf);
1739 kfree(cb);
1740 }
1741
1742
1743 /*
1744 * ti_buf_clear
1745 *
1746 * Clear out all data in the circular buffer.
1747 */
1748
1749 static void ti_buf_clear(struct circ_buf *cb)
1750 {
1751 cb->head = cb->tail = 0;
1752 }
1753
1754
1755 /*
1756 * ti_buf_data_avail
1757 *
1758 * Return the number of bytes of data available in the circular
1759 * buffer.
1760 */
1761
1762 static int ti_buf_data_avail(struct circ_buf *cb)
1763 {
1764 return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1765 }
1766
1767
1768 /*
1769 * ti_buf_space_avail
1770 *
1771 * Return the number of bytes of space available in the circular
1772 * buffer.
1773 */
1774
1775 static int ti_buf_space_avail(struct circ_buf *cb)
1776 {
1777 return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1778 }
1779
1780
1781 /*
1782 * ti_buf_put
1783 *
1784 * Copy data data from a user buffer and put it into the circular buffer.
1785 * Restrict to the amount of space available.
1786 *
1787 * Return the number of bytes copied.
1788 */
1789
1790 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1791 {
1792 int c, ret = 0;
1793
1794 while (1) {
1795 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1796 if (count < c)
1797 c = count;
1798 if (c <= 0)
1799 break;
1800 memcpy(cb->buf + cb->head, buf, c);
1801 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1802 buf += c;
1803 count -= c;
1804 ret += c;
1805 }
1806
1807 return ret;
1808 }
1809
1810
1811 /*
1812 * ti_buf_get
1813 *
1814 * Get data from the circular buffer and copy to the given buffer.
1815 * Restrict to the amount of data available.
1816 *
1817 * Return the number of bytes copied.
1818 */
1819
1820 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1821 {
1822 int c, ret = 0;
1823
1824 while (1) {
1825 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1826 if (count < c)
1827 c = count;
1828 if (c <= 0)
1829 break;
1830 memcpy(buf, cb->buf + cb->tail, c);
1831 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1832 buf += c;
1833 count -= c;
1834 ret += c;
1835 }
1836
1837 return ret;
1838 }
Linux kernel - Deliverables
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