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[PATCH] USB Serial: move name to driver structure
[mirror_ubuntu-artful-kernel.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/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 .owner = THIS_MODULE,
252 .name = "ti_usb_3410_5052",
253 .probe = usb_serial_probe,
254 .disconnect = usb_serial_disconnect,
255 .id_table = ti_id_table_combined,
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
355 /* insert extra vendor and product ids */
356 j = sizeof(ti_id_table_3410)/sizeof(struct usb_device_id)
357 - TI_EXTRA_VID_PID_COUNT - 1;
358 for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) {
359 ti_id_table_3410[j].idVendor = vendor_3410[i];
360 ti_id_table_3410[j].idProduct = product_3410[i];
361 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
362 }
363 j = sizeof(ti_id_table_5052)/sizeof(struct usb_device_id)
364 - TI_EXTRA_VID_PID_COUNT - 1;
365 for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) {
366 ti_id_table_5052[j].idVendor = vendor_5052[i];
367 ti_id_table_5052[j].idProduct = product_5052[i];
368 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
369 }
370
371 ret = usb_serial_register(&ti_1port_device);
372 if (ret)
373 goto failed_1port;
374 ret = usb_serial_register(&ti_2port_device);
375 if (ret)
376 goto failed_2port;
377
378 ret = usb_register(&ti_usb_driver);
379 if (ret)
380 goto failed_usb;
381
382 info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
383
384 return 0;
385
386 failed_usb:
387 usb_serial_deregister(&ti_2port_device);
388 failed_2port:
389 usb_serial_deregister(&ti_1port_device);
390 failed_1port:
391 return ret;
392 }
393
394
395 static void __exit ti_exit(void)
396 {
397 usb_serial_deregister(&ti_1port_device);
398 usb_serial_deregister(&ti_2port_device);
399 usb_deregister(&ti_usb_driver);
400 }
401
402
403 module_init(ti_init);
404 module_exit(ti_exit);
405
406
407 static int ti_startup(struct usb_serial *serial)
408 {
409 struct ti_device *tdev;
410 struct ti_port *tport;
411 struct usb_device *dev = serial->dev;
412 int status;
413 int i;
414
415
416 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
417 __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct),
418 dev->descriptor.bNumConfigurations,
419 dev->actconfig->desc.bConfigurationValue);
420
421 /* create device structure */
422 tdev = kmalloc(sizeof(struct ti_device), GFP_KERNEL);
423 if (tdev == NULL) {
424 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
425 return -ENOMEM;
426 }
427 memset(tdev, 0, sizeof(struct ti_device));
428 sema_init(&tdev->td_open_close_sem, 1);
429 tdev->td_serial = serial;
430 usb_set_serial_data(serial, tdev);
431
432 /* determine device type */
433 if (usb_match_id(serial->interface, ti_id_table_3410))
434 tdev->td_is_3410 = 1;
435 dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052");
436
437 /* if we have only 1 configuration, download firmware */
438 if (dev->descriptor.bNumConfigurations == 1) {
439
440 if (tdev->td_is_3410)
441 status = ti_download_firmware(tdev, ti_fw_3410,
442 sizeof(ti_fw_3410));
443 else
444 status = ti_download_firmware(tdev, ti_fw_5052,
445 sizeof(ti_fw_5052));
446 if (status)
447 goto free_tdev;
448
449 /* 3410 must be reset, 5052 resets itself */
450 if (tdev->td_is_3410) {
451 msleep_interruptible(100);
452 usb_reset_device(dev);
453 }
454
455 status = -ENODEV;
456 goto free_tdev;
457 }
458
459 /* the second configuration must be set (in sysfs by hotplug script) */
460 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
461 status = -ENODEV;
462 goto free_tdev;
463 }
464
465 /* set up port structures */
466 for (i = 0; i < serial->num_ports; ++i) {
467 tport = kmalloc(sizeof(struct ti_port), GFP_KERNEL);
468 if (tport == NULL) {
469 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
470 status = -ENOMEM;
471 goto free_tports;
472 }
473 memset(tport, 0, sizeof(struct ti_port));
474 spin_lock_init(&tport->tp_lock);
475 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
476 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
477 tport->tp_closing_wait = closing_wait;
478 init_waitqueue_head(&tport->tp_msr_wait);
479 init_waitqueue_head(&tport->tp_write_wait);
480 tport->tp_write_buf = ti_buf_alloc();
481 if (tport->tp_write_buf == NULL) {
482 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
483 kfree(tport);
484 status = -ENOMEM;
485 goto free_tports;
486 }
487 tport->tp_port = serial->port[i];
488 tport->tp_tdev = tdev;
489 usb_set_serial_port_data(serial->port[i], tport);
490 tport->tp_uart_mode = 0; /* default is RS232 */
491 }
492
493 return 0;
494
495 free_tports:
496 for (--i; i>=0; --i) {
497 tport = usb_get_serial_port_data(serial->port[i]);
498 ti_buf_free(tport->tp_write_buf);
499 kfree(tport);
500 usb_set_serial_port_data(serial->port[i], NULL);
501 }
502 free_tdev:
503 kfree(tdev);
504 usb_set_serial_data(serial, NULL);
505 return status;
506 }
507
508
509 static void ti_shutdown(struct usb_serial *serial)
510 {
511 int i;
512 struct ti_device *tdev = usb_get_serial_data(serial);
513 struct ti_port *tport;
514
515 dbg("%s", __FUNCTION__);
516
517 for (i=0; i < serial->num_ports; ++i) {
518 tport = usb_get_serial_port_data(serial->port[i]);
519 if (tport) {
520 ti_buf_free(tport->tp_write_buf);
521 kfree(tport);
522 usb_set_serial_port_data(serial->port[i], NULL);
523 }
524 }
525
526 kfree(tdev);
527 usb_set_serial_data(serial, NULL);
528 }
529
530
531 static int ti_open(struct usb_serial_port *port, struct file *file)
532 {
533 struct ti_port *tport = usb_get_serial_port_data(port);
534 struct ti_device *tdev;
535 struct usb_device *dev;
536 struct urb *urb;
537 int port_number;
538 int status;
539 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
540 TI_PIPE_TIMEOUT_ENABLE |
541 (TI_TRANSFER_TIMEOUT << 2));
542
543 dbg("%s - port %d", __FUNCTION__, port->number);
544
545 if (tport == NULL)
546 return -ENODEV;
547
548 dev = port->serial->dev;
549 tdev = tport->tp_tdev;
550
551 /* only one open on any port on a device at a time */
552 if (down_interruptible(&tdev->td_open_close_sem))
553 return -ERESTARTSYS;
554
555 if (port->tty)
556 port->tty->low_latency =
557 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
558
559 port_number = port->number - port->serial->minor;
560
561 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
562
563 tport->tp_msr = 0;
564 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
565
566 /* start interrupt urb the first time a port is opened on this device */
567 if (tdev->td_open_port_count == 0) {
568 dbg("%s - start interrupt in urb", __FUNCTION__);
569 urb = tdev->td_serial->port[0]->interrupt_in_urb;
570 if (!urb) {
571 dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__);
572 status = -EINVAL;
573 goto up_sem;
574 }
575 urb->complete = ti_interrupt_callback;
576 urb->context = tdev;
577 urb->dev = dev;
578 status = usb_submit_urb(urb, GFP_KERNEL);
579 if (status) {
580 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status);
581 goto up_sem;
582 }
583 }
584
585 ti_set_termios(port, NULL);
586
587 dbg("%s - sending TI_OPEN_PORT", __FUNCTION__);
588 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
589 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
590 if (status) {
591 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status);
592 goto unlink_int_urb;
593 }
594
595 dbg("%s - sending TI_START_PORT", __FUNCTION__);
596 status = ti_command_out_sync(tdev, TI_START_PORT,
597 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
598 if (status) {
599 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status);
600 goto unlink_int_urb;
601 }
602
603 dbg("%s - sending TI_PURGE_PORT", __FUNCTION__);
604 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
605 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
606 if (status) {
607 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status);
608 goto unlink_int_urb;
609 }
610 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
611 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
612 if (status) {
613 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status);
614 goto unlink_int_urb;
615 }
616
617 /* reset the data toggle on the bulk endpoints to work around bug in
618 * host controllers where things get out of sync some times */
619 usb_clear_halt(dev, port->write_urb->pipe);
620 usb_clear_halt(dev, port->read_urb->pipe);
621
622 ti_set_termios(port, NULL);
623
624 dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__);
625 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
626 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
627 if (status) {
628 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status);
629 goto unlink_int_urb;
630 }
631
632 dbg("%s - sending TI_START_PORT (2)", __FUNCTION__);
633 status = ti_command_out_sync(tdev, TI_START_PORT,
634 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
635 if (status) {
636 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status);
637 goto unlink_int_urb;
638 }
639
640 /* start read urb */
641 dbg("%s - start read urb", __FUNCTION__);
642 urb = port->read_urb;
643 if (!urb) {
644 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__);
645 status = -EINVAL;
646 goto unlink_int_urb;
647 }
648 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
649 urb->complete = ti_bulk_in_callback;
650 urb->context = tport;
651 urb->dev = dev;
652 status = usb_submit_urb(urb, GFP_KERNEL);
653 if (status) {
654 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status);
655 goto unlink_int_urb;
656 }
657
658 tport->tp_is_open = 1;
659 ++tdev->td_open_port_count;
660
661 goto up_sem;
662
663 unlink_int_urb:
664 if (tdev->td_open_port_count == 0)
665 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
666 up_sem:
667 up(&tdev->td_open_close_sem);
668 dbg("%s - exit %d", __FUNCTION__, status);
669 return status;
670 }
671
672
673 static void ti_close(struct usb_serial_port *port, struct file *file)
674 {
675 struct ti_device *tdev;
676 struct ti_port *tport;
677 int port_number;
678 int status;
679 int do_up;
680
681 dbg("%s - port %d", __FUNCTION__, port->number);
682
683 tdev = usb_get_serial_data(port->serial);
684 tport = usb_get_serial_port_data(port);
685 if (tdev == NULL || tport == NULL)
686 return;
687
688 tport->tp_is_open = 0;
689
690 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
691
692 usb_kill_urb(port->read_urb);
693 usb_kill_urb(port->write_urb);
694 tport->tp_write_urb_in_use = 0;
695
696 port_number = port->number - port->serial->minor;
697
698 dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__);
699 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
700 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
701 if (status)
702 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status);
703
704 /* if down is interrupted, continue anyway */
705 do_up = !down_interruptible(&tdev->td_open_close_sem);
706 --tport->tp_tdev->td_open_port_count;
707 if (tport->tp_tdev->td_open_port_count <= 0) {
708 /* last port is closed, shut down interrupt urb */
709 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
710 tport->tp_tdev->td_open_port_count = 0;
711 }
712 if (do_up)
713 up(&tdev->td_open_close_sem);
714
715 dbg("%s - exit", __FUNCTION__);
716 }
717
718
719 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
720 int count)
721 {
722 struct ti_port *tport = usb_get_serial_port_data(port);
723 unsigned long flags;
724
725 dbg("%s - port %d", __FUNCTION__, port->number);
726
727 if (count == 0) {
728 dbg("%s - write request of 0 bytes", __FUNCTION__);
729 return 0;
730 }
731
732 if (tport == NULL || !tport->tp_is_open)
733 return -ENODEV;
734
735 spin_lock_irqsave(&tport->tp_lock, flags);
736 count = ti_buf_put(tport->tp_write_buf, data, count);
737 spin_unlock_irqrestore(&tport->tp_lock, flags);
738
739 ti_send(tport);
740
741 return count;
742 }
743
744
745 static int ti_write_room(struct usb_serial_port *port)
746 {
747 struct ti_port *tport = usb_get_serial_port_data(port);
748 int room = 0;
749 unsigned long flags;
750
751 dbg("%s - port %d", __FUNCTION__, port->number);
752
753 if (tport == NULL)
754 return -ENODEV;
755
756 spin_lock_irqsave(&tport->tp_lock, flags);
757 room = ti_buf_space_avail(tport->tp_write_buf);
758 spin_unlock_irqrestore(&tport->tp_lock, flags);
759
760 dbg("%s - returns %d", __FUNCTION__, room);
761 return room;
762 }
763
764
765 static int ti_chars_in_buffer(struct usb_serial_port *port)
766 {
767 struct ti_port *tport = usb_get_serial_port_data(port);
768 int chars = 0;
769 unsigned long flags;
770
771 dbg("%s - port %d", __FUNCTION__, port->number);
772
773 if (tport == NULL)
774 return -ENODEV;
775
776 spin_lock_irqsave(&tport->tp_lock, flags);
777 chars = ti_buf_data_avail(tport->tp_write_buf);
778 spin_unlock_irqrestore(&tport->tp_lock, flags);
779
780 dbg("%s - returns %d", __FUNCTION__, chars);
781 return chars;
782 }
783
784
785 static void ti_throttle(struct usb_serial_port *port)
786 {
787 struct ti_port *tport = usb_get_serial_port_data(port);
788 struct tty_struct *tty;
789
790 dbg("%s - port %d", __FUNCTION__, port->number);
791
792 if (tport == NULL)
793 return;
794
795 tty = port->tty;
796 if (!tty) {
797 dbg("%s - no tty", __FUNCTION__);
798 return;
799 }
800
801 if (I_IXOFF(tty) || C_CRTSCTS(tty))
802 ti_stop_read(tport, tty);
803
804 }
805
806
807 static void ti_unthrottle(struct usb_serial_port *port)
808 {
809 struct ti_port *tport = usb_get_serial_port_data(port);
810 struct tty_struct *tty;
811 int status;
812
813 dbg("%s - port %d", __FUNCTION__, port->number);
814
815 if (tport == NULL)
816 return;
817
818 tty = port->tty;
819 if (!tty) {
820 dbg("%s - no tty", __FUNCTION__);
821 return;
822 }
823
824 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
825 status = ti_restart_read(tport, tty);
826 if (status)
827 dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status);
828 }
829 }
830
831
832 static int ti_ioctl(struct usb_serial_port *port, struct file *file,
833 unsigned int cmd, unsigned long arg)
834 {
835 struct ti_port *tport = usb_get_serial_port_data(port);
836 struct async_icount cnow;
837 struct async_icount cprev;
838
839 dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd);
840
841 if (tport == NULL)
842 return -ENODEV;
843
844 switch (cmd) {
845 case TIOCGSERIAL:
846 dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
847 return ti_get_serial_info(tport, (struct serial_struct __user *)arg);
848 break;
849
850 case TIOCSSERIAL:
851 dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
852 return ti_set_serial_info(tport, (struct serial_struct __user *)arg);
853 break;
854
855 case TIOCMIWAIT:
856 dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
857 cprev = tport->tp_icount;
858 while (1) {
859 interruptible_sleep_on(&tport->tp_msr_wait);
860 if (signal_pending(current))
861 return -ERESTARTSYS;
862 cnow = tport->tp_icount;
863 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
864 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
865 return -EIO; /* no change => error */
866 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
867 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
868 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
869 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
870 return 0;
871 }
872 cprev = cnow;
873 }
874 break;
875
876 case TIOCGICOUNT:
877 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx);
878 if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount)))
879 return -EFAULT;
880 return 0;
881 }
882
883 return -ENOIOCTLCMD;
884 }
885
886
887 static void ti_set_termios(struct usb_serial_port *port,
888 struct termios *old_termios)
889 {
890 struct ti_port *tport = usb_get_serial_port_data(port);
891 struct tty_struct *tty = port->tty;
892 struct ti_uart_config *config;
893 tcflag_t cflag,iflag;
894 int baud;
895 int status;
896 int port_number = port->number - port->serial->minor;
897 unsigned int mcr;
898
899 dbg("%s - port %d", __FUNCTION__, port->number);
900
901 if (!tty || !tty->termios) {
902 dbg("%s - no tty or termios", __FUNCTION__);
903 return;
904 }
905
906 cflag = tty->termios->c_cflag;
907 iflag = tty->termios->c_iflag;
908
909 if (old_termios && cflag == old_termios->c_cflag
910 && iflag == old_termios->c_iflag) {
911 dbg("%s - nothing to change", __FUNCTION__);
912 return;
913 }
914
915 dbg("%s - clfag %08x, iflag %08x", __FUNCTION__, cflag, iflag);
916
917 if (old_termios)
918 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag);
919
920 if (tport == NULL)
921 return;
922
923 config = kmalloc(sizeof(*config), GFP_KERNEL);
924 if (!config) {
925 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
926 return;
927 }
928
929 config->wFlags = 0;
930
931 /* these flags must be set */
932 config->wFlags |= TI_UART_ENABLE_MS_INTS;
933 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
934 config->bUartMode = (__u8)(tport->tp_uart_mode);
935
936 switch (cflag & CSIZE) {
937 case CS5:
938 config->bDataBits = TI_UART_5_DATA_BITS;
939 break;
940 case CS6:
941 config->bDataBits = TI_UART_6_DATA_BITS;
942 break;
943 case CS7:
944 config->bDataBits = TI_UART_7_DATA_BITS;
945 break;
946 default:
947 case CS8:
948 config->bDataBits = TI_UART_8_DATA_BITS;
949 break;
950 }
951
952 if (cflag & PARENB) {
953 if (cflag & PARODD) {
954 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
955 config->bParity = TI_UART_ODD_PARITY;
956 } else {
957 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
958 config->bParity = TI_UART_EVEN_PARITY;
959 }
960 } else {
961 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
962 config->bParity = TI_UART_NO_PARITY;
963 }
964
965 if (cflag & CSTOPB)
966 config->bStopBits = TI_UART_2_STOP_BITS;
967 else
968 config->bStopBits = TI_UART_1_STOP_BITS;
969
970 if (cflag & CRTSCTS) {
971 /* RTS flow control must be off to drop RTS for baud rate B0 */
972 if ((cflag & CBAUD) != B0)
973 config->wFlags |= TI_UART_ENABLE_RTS_IN;
974 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
975 } else {
976 tty->hw_stopped = 0;
977 ti_restart_read(tport, tty);
978 }
979
980 if (I_IXOFF(tty) || I_IXON(tty)) {
981 config->cXon = START_CHAR(tty);
982 config->cXoff = STOP_CHAR(tty);
983
984 if (I_IXOFF(tty))
985 config->wFlags |= TI_UART_ENABLE_X_IN;
986 else
987 ti_restart_read(tport, tty);
988
989 if (I_IXON(tty))
990 config->wFlags |= TI_UART_ENABLE_X_OUT;
991 }
992
993 baud = tty_get_baud_rate(tty);
994 if (!baud) baud = 9600;
995 if (tport->tp_tdev->td_is_3410)
996 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
997 else
998 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
999
1000 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
1001 __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
1002
1003 cpu_to_be16s(&config->wBaudRate);
1004 cpu_to_be16s(&config->wFlags);
1005
1006 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1007 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1008 sizeof(*config));
1009 if (status)
1010 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status);
1011
1012 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1013 mcr = tport->tp_shadow_mcr;
1014 /* if baud rate is B0, clear RTS and DTR */
1015 if ((cflag & CBAUD) == B0)
1016 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1017 status = ti_set_mcr(tport, mcr);
1018 if (status)
1019 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status);
1020
1021 kfree(config);
1022 }
1023
1024
1025 static int ti_tiocmget(struct usb_serial_port *port, struct file *file)
1026 {
1027 struct ti_port *tport = usb_get_serial_port_data(port);
1028 unsigned int result;
1029 unsigned int msr;
1030 unsigned int mcr;
1031
1032 dbg("%s - port %d", __FUNCTION__, port->number);
1033
1034 if (tport == NULL)
1035 return -ENODEV;
1036
1037 msr = tport->tp_msr;
1038 mcr = tport->tp_shadow_mcr;
1039
1040 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1041 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1042 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1043 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1044 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1045 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1046 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1047
1048 dbg("%s - 0x%04X", __FUNCTION__, result);
1049
1050 return result;
1051 }
1052
1053
1054 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
1055 unsigned int set, unsigned int clear)
1056 {
1057 struct ti_port *tport = usb_get_serial_port_data(port);
1058 unsigned int mcr;
1059
1060 dbg("%s - port %d", __FUNCTION__, port->number);
1061
1062 if (tport == NULL)
1063 return -ENODEV;
1064
1065 mcr = tport->tp_shadow_mcr;
1066
1067 if (set & TIOCM_RTS)
1068 mcr |= TI_MCR_RTS;
1069 if (set & TIOCM_DTR)
1070 mcr |= TI_MCR_DTR;
1071 if (set & TIOCM_LOOP)
1072 mcr |= TI_MCR_LOOP;
1073
1074 if (clear & TIOCM_RTS)
1075 mcr &= ~TI_MCR_RTS;
1076 if (clear & TIOCM_DTR)
1077 mcr &= ~TI_MCR_DTR;
1078 if (clear & TIOCM_LOOP)
1079 mcr &= ~TI_MCR_LOOP;
1080
1081 return ti_set_mcr(tport, mcr);
1082 }
1083
1084
1085 static void ti_break(struct usb_serial_port *port, int break_state)
1086 {
1087 struct ti_port *tport = usb_get_serial_port_data(port);
1088 int status;
1089
1090 dbg("%s - state = %d", __FUNCTION__, break_state);
1091
1092 if (tport == NULL)
1093 return;
1094
1095 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1096
1097 status = ti_write_byte(tport->tp_tdev,
1098 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1099 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1100
1101 if (status)
1102 dbg("%s - error setting break, %d", __FUNCTION__, status);
1103 }
1104
1105
1106 static void ti_interrupt_callback(struct urb *urb, struct pt_regs *regs)
1107 {
1108 struct ti_device *tdev = (struct ti_device *)urb->context;
1109 struct usb_serial_port *port;
1110 struct usb_serial *serial = tdev->td_serial;
1111 struct ti_port *tport;
1112 struct device *dev = &urb->dev->dev;
1113 unsigned char *data = urb->transfer_buffer;
1114 int length = urb->actual_length;
1115 int port_number;
1116 int function;
1117 int status;
1118 __u8 msr;
1119
1120 dbg("%s", __FUNCTION__);
1121
1122 switch (urb->status) {
1123 case 0:
1124 break;
1125 case -ECONNRESET:
1126 case -ENOENT:
1127 case -ESHUTDOWN:
1128 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1129 tdev->td_urb_error = 1;
1130 return;
1131 default:
1132 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1133 tdev->td_urb_error = 1;
1134 goto exit;
1135 }
1136
1137 if (length != 2) {
1138 dbg("%s - bad packet size, %d", __FUNCTION__, length);
1139 goto exit;
1140 }
1141
1142 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1143 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]);
1144 goto exit;
1145 }
1146
1147 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1148 function = TI_GET_FUNC_FROM_CODE(data[0]);
1149
1150 dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]);
1151
1152 if (port_number >= serial->num_ports) {
1153 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number);
1154 goto exit;
1155 }
1156
1157 port = serial->port[port_number];
1158
1159 tport = usb_get_serial_port_data(port);
1160 if (!tport)
1161 goto exit;
1162
1163 switch (function) {
1164 case TI_CODE_DATA_ERROR:
1165 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]);
1166 break;
1167
1168 case TI_CODE_MODEM_STATUS:
1169 msr = data[1];
1170 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr);
1171 ti_handle_new_msr(tport, msr);
1172 break;
1173
1174 default:
1175 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]);
1176 break;
1177 }
1178
1179 exit:
1180 status = usb_submit_urb(urb, GFP_ATOMIC);
1181 if (status)
1182 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", __FUNCTION__, status);
1183 }
1184
1185
1186 static void ti_bulk_in_callback(struct urb *urb, struct pt_regs *regs)
1187 {
1188 struct ti_port *tport = (struct ti_port *)urb->context;
1189 struct usb_serial_port *port = tport->tp_port;
1190 struct device *dev = &urb->dev->dev;
1191 int status = 0;
1192
1193 dbg("%s", __FUNCTION__);
1194
1195 switch (urb->status) {
1196 case 0:
1197 break;
1198 case -ECONNRESET:
1199 case -ENOENT:
1200 case -ESHUTDOWN:
1201 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1202 tport->tp_tdev->td_urb_error = 1;
1203 wake_up_interruptible(&tport->tp_write_wait);
1204 return;
1205 default:
1206 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status );
1207 tport->tp_tdev->td_urb_error = 1;
1208 wake_up_interruptible(&tport->tp_write_wait);
1209 }
1210
1211 if (urb->status == -EPIPE)
1212 goto exit;
1213
1214 if (urb->status) {
1215 dev_err(dev, "%s - stopping read!\n", __FUNCTION__);
1216 return;
1217 }
1218
1219 if (port->tty && urb->actual_length) {
1220 usb_serial_debug_data(debug, dev, __FUNCTION__,
1221 urb->actual_length, urb->transfer_buffer);
1222
1223 if (!tport->tp_is_open)
1224 dbg("%s - port closed, dropping data", __FUNCTION__);
1225 else
1226 ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer,
1227 urb->actual_length);
1228
1229 spin_lock(&tport->tp_lock);
1230 tport->tp_icount.rx += urb->actual_length;
1231 spin_unlock(&tport->tp_lock);
1232 }
1233
1234 exit:
1235 /* continue to read unless stopping */
1236 spin_lock(&tport->tp_lock);
1237 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1238 urb->dev = port->serial->dev;
1239 status = usb_submit_urb(urb, GFP_ATOMIC);
1240 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1241 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1242 }
1243 spin_unlock(&tport->tp_lock);
1244 if (status)
1245 dev_err(dev, "%s - resubmit read urb failed, %d\n", __FUNCTION__, status);
1246 }
1247
1248
1249 static void ti_bulk_out_callback(struct urb *urb, struct pt_regs *regs)
1250 {
1251 struct ti_port *tport = (struct ti_port *)urb->context;
1252 struct usb_serial_port *port = tport->tp_port;
1253 struct device *dev = &urb->dev->dev;
1254
1255 dbg("%s - port %d", __FUNCTION__, port->number);
1256
1257 tport->tp_write_urb_in_use = 0;
1258
1259 switch (urb->status) {
1260 case 0:
1261 break;
1262 case -ECONNRESET:
1263 case -ENOENT:
1264 case -ESHUTDOWN:
1265 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1266 tport->tp_tdev->td_urb_error = 1;
1267 wake_up_interruptible(&tport->tp_write_wait);
1268 return;
1269 default:
1270 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1271 tport->tp_tdev->td_urb_error = 1;
1272 wake_up_interruptible(&tport->tp_write_wait);
1273 }
1274
1275 /* send any buffered data */
1276 ti_send(tport);
1277 }
1278
1279
1280 static void ti_recv(struct device *dev, struct tty_struct *tty,
1281 unsigned char *data, int length)
1282 {
1283 int cnt;
1284
1285 do {
1286 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
1287 tty_flip_buffer_push(tty);
1288 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
1289 dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length);
1290 return;
1291 }
1292 }
1293 cnt = min(length, TTY_FLIPBUF_SIZE - tty->flip.count);
1294 memcpy(tty->flip.char_buf_ptr, data, cnt);
1295 memset(tty->flip.flag_buf_ptr, 0, cnt);
1296 tty->flip.char_buf_ptr += cnt;
1297 tty->flip.flag_buf_ptr += cnt;
1298 tty->flip.count += cnt;
1299 data += cnt;
1300 length -= cnt;
1301 } while (length > 0);
1302
1303 tty_flip_buffer_push(tty);
1304 }
1305
1306
1307 static void ti_send(struct ti_port *tport)
1308 {
1309 int count, result;
1310 struct usb_serial_port *port = tport->tp_port;
1311 struct tty_struct *tty = port->tty;
1312 unsigned long flags;
1313
1314
1315 dbg("%s - port %d", __FUNCTION__, port->number);
1316
1317 spin_lock_irqsave(&tport->tp_lock, flags);
1318
1319 if (tport->tp_write_urb_in_use) {
1320 spin_unlock_irqrestore(&tport->tp_lock, flags);
1321 return;
1322 }
1323
1324 count = ti_buf_get(tport->tp_write_buf,
1325 port->write_urb->transfer_buffer,
1326 port->bulk_out_size);
1327
1328 if (count == 0) {
1329 spin_unlock_irqrestore(&tport->tp_lock, flags);
1330 return;
1331 }
1332
1333 tport->tp_write_urb_in_use = 1;
1334
1335 spin_unlock_irqrestore(&tport->tp_lock, flags);
1336
1337 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
1338
1339 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1340 usb_sndbulkpipe(port->serial->dev,
1341 port->bulk_out_endpointAddress),
1342 port->write_urb->transfer_buffer, count,
1343 ti_bulk_out_callback, tport);
1344
1345 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1346 if (result) {
1347 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result);
1348 tport->tp_write_urb_in_use = 0;
1349 /* TODO: reschedule ti_send */
1350 } else {
1351 spin_lock_irqsave(&tport->tp_lock, flags);
1352 tport->tp_icount.tx += count;
1353 spin_unlock_irqrestore(&tport->tp_lock, flags);
1354 }
1355
1356 /* more room in the buffer for new writes, wakeup */
1357 if (tty)
1358 tty_wakeup(tty);
1359 wake_up_interruptible(&tport->tp_write_wait);
1360 }
1361
1362
1363 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1364 {
1365 int status;
1366
1367 status = ti_write_byte(tport->tp_tdev,
1368 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1369 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1370
1371 if (!status)
1372 tport->tp_shadow_mcr = mcr;
1373
1374 return status;
1375 }
1376
1377
1378 static int ti_get_lsr(struct ti_port *tport)
1379 {
1380 int size,status;
1381 struct ti_device *tdev = tport->tp_tdev;
1382 struct usb_serial_port *port = tport->tp_port;
1383 int port_number = port->number - port->serial->minor;
1384 struct ti_port_status *data;
1385
1386 dbg("%s - port %d", __FUNCTION__, port->number);
1387
1388 size = sizeof(struct ti_port_status);
1389 data = kmalloc(size, GFP_KERNEL);
1390 if (!data) {
1391 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
1392 return -ENOMEM;
1393 }
1394
1395 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1396 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1397 if (status) {
1398 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status);
1399 goto free_data;
1400 }
1401
1402 dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR);
1403
1404 tport->tp_lsr = data->bLSR;
1405
1406 free_data:
1407 kfree(data);
1408 return status;
1409 }
1410
1411
1412 static int ti_get_serial_info(struct ti_port *tport,
1413 struct serial_struct __user *ret_arg)
1414 {
1415 struct usb_serial_port *port = tport->tp_port;
1416 struct serial_struct ret_serial;
1417
1418 if (!ret_arg)
1419 return -EFAULT;
1420
1421 memset(&ret_serial, 0, sizeof(ret_serial));
1422
1423 ret_serial.type = PORT_16550A;
1424 ret_serial.line = port->serial->minor;
1425 ret_serial.port = port->number - port->serial->minor;
1426 ret_serial.flags = tport->tp_flags;
1427 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1428 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1429 ret_serial.closing_wait = tport->tp_closing_wait;
1430
1431 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1432 return -EFAULT;
1433
1434 return 0;
1435 }
1436
1437
1438 static int ti_set_serial_info(struct ti_port *tport,
1439 struct serial_struct __user *new_arg)
1440 {
1441 struct usb_serial_port *port = tport->tp_port;
1442 struct serial_struct new_serial;
1443
1444 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1445 return -EFAULT;
1446
1447 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1448 if (port->tty)
1449 port->tty->low_latency =
1450 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1451 tport->tp_closing_wait = new_serial.closing_wait;
1452
1453 return 0;
1454 }
1455
1456
1457 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1458 {
1459 struct async_icount *icount;
1460 struct tty_struct *tty;
1461 unsigned long flags;
1462
1463 dbg("%s - msr 0x%02X", __FUNCTION__, msr);
1464
1465 if (msr & TI_MSR_DELTA_MASK) {
1466 spin_lock_irqsave(&tport->tp_lock, flags);
1467 icount = &tport->tp_icount;
1468 if (msr & TI_MSR_DELTA_CTS)
1469 icount->cts++;
1470 if (msr & TI_MSR_DELTA_DSR)
1471 icount->dsr++;
1472 if (msr & TI_MSR_DELTA_CD)
1473 icount->dcd++;
1474 if (msr & TI_MSR_DELTA_RI)
1475 icount->rng++;
1476 wake_up_interruptible(&tport->tp_msr_wait);
1477 spin_unlock_irqrestore(&tport->tp_lock, flags);
1478 }
1479
1480 tport->tp_msr = msr & TI_MSR_MASK;
1481
1482 /* handle CTS flow control */
1483 tty = tport->tp_port->tty;
1484 if (tty && C_CRTSCTS(tty)) {
1485 if (msr & TI_MSR_CTS) {
1486 tty->hw_stopped = 0;
1487 tty_wakeup(tty);
1488 } else {
1489 tty->hw_stopped = 1;
1490 }
1491 }
1492 }
1493
1494
1495 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1496 {
1497 struct ti_device *tdev = tport->tp_tdev;
1498 struct usb_serial_port *port = tport->tp_port;
1499 wait_queue_t wait;
1500 unsigned long flags;
1501
1502 dbg("%s - port %d", __FUNCTION__, port->number);
1503
1504 spin_lock_irqsave(&tport->tp_lock, flags);
1505
1506 /* wait for data to drain from the buffer */
1507 tdev->td_urb_error = 0;
1508 init_waitqueue_entry(&wait, current);
1509 add_wait_queue(&tport->tp_write_wait, &wait);
1510 for (;;) {
1511 set_current_state(TASK_INTERRUPTIBLE);
1512 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1513 || timeout == 0 || signal_pending(current)
1514 || tdev->td_urb_error
1515 || !usb_get_intfdata(port->serial->interface)) /* disconnect */
1516 break;
1517 spin_unlock_irqrestore(&tport->tp_lock, flags);
1518 timeout = schedule_timeout(timeout);
1519 spin_lock_irqsave(&tport->tp_lock, flags);
1520 }
1521 set_current_state(TASK_RUNNING);
1522 remove_wait_queue(&tport->tp_write_wait, &wait);
1523
1524 /* flush any remaining data in the buffer */
1525 if (flush)
1526 ti_buf_clear(tport->tp_write_buf);
1527
1528 spin_unlock_irqrestore(&tport->tp_lock, flags);
1529
1530 /* wait for data to drain from the device */
1531 /* wait for empty tx register, plus 20 ms */
1532 timeout += jiffies;
1533 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1534 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1535 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1536 && usb_get_intfdata(port->serial->interface)) { /* not disconnected */
1537 if (ti_get_lsr(tport))
1538 break;
1539 msleep_interruptible(20);
1540 }
1541 }
1542
1543
1544 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1545 {
1546 unsigned long flags;
1547
1548 spin_lock_irqsave(&tport->tp_lock, flags);
1549
1550 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1551 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1552
1553 spin_unlock_irqrestore(&tport->tp_lock, flags);
1554 }
1555
1556
1557 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1558 {
1559 struct urb *urb;
1560 int status = 0;
1561 unsigned long flags;
1562
1563 spin_lock_irqsave(&tport->tp_lock, flags);
1564
1565 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1566 urb = tport->tp_port->read_urb;
1567 urb->complete = ti_bulk_in_callback;
1568 urb->context = tport;
1569 urb->dev = tport->tp_port->serial->dev;
1570 status = usb_submit_urb(urb, GFP_KERNEL);
1571 }
1572 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1573
1574 spin_unlock_irqrestore(&tport->tp_lock, flags);
1575
1576 return status;
1577 }
1578
1579
1580 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1581 __u16 moduleid, __u16 value, __u8 *data, int size)
1582 {
1583 int status;
1584
1585 status = usb_control_msg(tdev->td_serial->dev,
1586 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1587 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1588 value, moduleid, data, size, 1000);
1589
1590 if (status == size)
1591 status = 0;
1592
1593 if (status > 0)
1594 status = -ECOMM;
1595
1596 return status;
1597 }
1598
1599
1600 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1601 __u16 moduleid, __u16 value, __u8 *data, int size)
1602 {
1603 int status;
1604
1605 status = usb_control_msg(tdev->td_serial->dev,
1606 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1607 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1608 value, moduleid, data, size, 1000);
1609
1610 if (status == size)
1611 status = 0;
1612
1613 if (status > 0)
1614 status = -ECOMM;
1615
1616 return status;
1617 }
1618
1619
1620 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1621 __u8 mask, __u8 byte)
1622 {
1623 int status;
1624 unsigned int size;
1625 struct ti_write_data_bytes *data;
1626 struct device *dev = &tdev->td_serial->dev->dev;
1627
1628 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte);
1629
1630 size = sizeof(struct ti_write_data_bytes) + 2;
1631 data = kmalloc(size, GFP_KERNEL);
1632 if (!data) {
1633 dev_err(dev, "%s - out of memory\n", __FUNCTION__);
1634 return -ENOMEM;
1635 }
1636
1637 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1638 data->bDataType = TI_RW_DATA_BYTE;
1639 data->bDataCounter = 1;
1640 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1641 data->wBaseAddrLo = cpu_to_be16(addr);
1642 data->bData[0] = mask;
1643 data->bData[1] = byte;
1644
1645 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1646 (__u8 *)data, size);
1647
1648 if (status < 0)
1649 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status);
1650
1651 kfree(data);
1652
1653 return status;
1654 }
1655
1656
1657 static int ti_download_firmware(struct ti_device *tdev,
1658 unsigned char *firmware, unsigned int firmware_size)
1659 {
1660 int status = 0;
1661 int buffer_size;
1662 int pos;
1663 int len;
1664 int done;
1665 __u8 cs = 0;
1666 __u8 *buffer;
1667 struct usb_device *dev = tdev->td_serial->dev;
1668 struct ti_firmware_header *header;
1669 unsigned int pipe = usb_sndbulkpipe(dev,
1670 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1671
1672
1673 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1674 buffer = kmalloc(buffer_size, GFP_KERNEL);
1675 if (!buffer) {
1676 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
1677 return -ENOMEM;
1678 }
1679
1680 memcpy(buffer, firmware, firmware_size);
1681 memset(buffer+firmware_size, 0xff, buffer_size-firmware_size);
1682
1683 for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++)
1684 cs = (__u8)(cs + buffer[pos]);
1685
1686 header = (struct ti_firmware_header *)buffer;
1687 header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header)));
1688 header->bCheckSum = cs;
1689
1690 dbg("%s - downloading firmware", __FUNCTION__);
1691 for (pos = 0; pos < buffer_size; pos += done) {
1692 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1693 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000);
1694 if (status)
1695 break;
1696 }
1697
1698 kfree(buffer);
1699
1700 if (status) {
1701 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status);
1702 return status;
1703 }
1704
1705 dbg("%s - download successful", __FUNCTION__);
1706
1707 return 0;
1708 }
1709
1710
1711 /* Circular Buffer Functions */
1712
1713 /*
1714 * ti_buf_alloc
1715 *
1716 * Allocate a circular buffer and all associated memory.
1717 */
1718
1719 static struct circ_buf *ti_buf_alloc(void)
1720 {
1721 struct circ_buf *cb;
1722
1723 cb = (struct circ_buf *)kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1724 if (cb == NULL)
1725 return NULL;
1726
1727 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1728 if (cb->buf == NULL) {
1729 kfree(cb);
1730 return NULL;
1731 }
1732
1733 ti_buf_clear(cb);
1734
1735 return cb;
1736 }
1737
1738
1739 /*
1740 * ti_buf_free
1741 *
1742 * Free the buffer and all associated memory.
1743 */
1744
1745 static void ti_buf_free(struct circ_buf *cb)
1746 {
1747 kfree(cb->buf);
1748 kfree(cb);
1749 }
1750
1751
1752 /*
1753 * ti_buf_clear
1754 *
1755 * Clear out all data in the circular buffer.
1756 */
1757
1758 static void ti_buf_clear(struct circ_buf *cb)
1759 {
1760 cb->head = cb->tail = 0;
1761 }
1762
1763
1764 /*
1765 * ti_buf_data_avail
1766 *
1767 * Return the number of bytes of data available in the circular
1768 * buffer.
1769 */
1770
1771 static int ti_buf_data_avail(struct circ_buf *cb)
1772 {
1773 return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1774 }
1775
1776
1777 /*
1778 * ti_buf_space_avail
1779 *
1780 * Return the number of bytes of space available in the circular
1781 * buffer.
1782 */
1783
1784 static int ti_buf_space_avail(struct circ_buf *cb)
1785 {
1786 return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1787 }
1788
1789
1790 /*
1791 * ti_buf_put
1792 *
1793 * Copy data data from a user buffer and put it into the circular buffer.
1794 * Restrict to the amount of space available.
1795 *
1796 * Return the number of bytes copied.
1797 */
1798
1799 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1800 {
1801 int c, ret = 0;
1802
1803 while (1) {
1804 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1805 if (count < c)
1806 c = count;
1807 if (c <= 0)
1808 break;
1809 memcpy(cb->buf + cb->head, buf, c);
1810 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1811 buf += c;
1812 count -= c;
1813 ret += c;
1814 }
1815
1816 return ret;
1817 }
1818
1819
1820 /*
1821 * ti_buf_get
1822 *
1823 * Get data from the circular buffer and copy to the given buffer.
1824 * Restrict to the amount of data available.
1825 *
1826 * Return the number of bytes copied.
1827 */
1828
1829 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1830 {
1831 int c, ret = 0;
1832
1833 while (1) {
1834 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1835 if (count < c)
1836 c = count;
1837 if (c <= 0)
1838 break;
1839 memcpy(buf, cb->buf + cb->tail, c);
1840 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1841 buf += c;
1842 count -= c;
1843 ret += c;
1844 }
1845
1846 return ret;
1847 }
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