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Adding support for MOXA ART SoC. Testing port of linux-2.6.32.60-moxart.
[linux-3.6.7-moxart.git] / drivers / usb / serial / ti_usb_3410_5052.c
blob33537bb778d0e46a843b9cdae17350da1dead1fd
1 /* vi: ts=8 sw=8
2 *
3 * TI 3410/5052 USB Serial Driver
4 *
5 * Copyright (C) 2004 Texas Instruments
6 *
7 * This driver is based on the Linux io_ti driver, which is
8 * Copyright (C) 2000-2002 Inside Out Networks
9 * Copyright (C) 2001-2002 Greg Kroah-Hartman
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * For questions or problems with this driver, contact Texas Instruments
17 * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
18 * Peter Berger <pberger@brimson.com>.
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/firmware.h>
24 #include <linux/init.h>
25 #include <linux/slab.h>
26 #include <linux/tty.h>
27 #include <linux/tty_driver.h>
28 #include <linux/tty_flip.h>
29 #include <linux/module.h>
30 #include <linux/spinlock.h>
31 #include <linux/ioctl.h>
32 #include <linux/serial.h>
33 #include <linux/kfifo.h>
34 #include <linux/mutex.h>
35 #include <linux/uaccess.h>
36 #include <linux/usb.h>
37 #include <linux/usb/serial.h>
38
39 #include "ti_usb_3410_5052.h"
40
41 /* Defines */
42
43 #define TI_DRIVER_VERSION "v0.10"
44 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>"
45 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver"
46
47 #define TI_FIRMWARE_BUF_SIZE 16284
48
49 #define TI_WRITE_BUF_SIZE 1024
50
51 #define TI_TRANSFER_TIMEOUT 2
52
53 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */
54
55 /* supported setserial flags */
56 #define TI_SET_SERIAL_FLAGS 0
57
58 /* read urb states */
59 #define TI_READ_URB_RUNNING 0
60 #define TI_READ_URB_STOPPING 1
61 #define TI_READ_URB_STOPPED 2
62
63 #define TI_EXTRA_VID_PID_COUNT 5
64
65
66 /* Structures */
67
68 struct ti_port {
69 int tp_is_open;
70 __u8 tp_msr;
71 __u8 tp_lsr;
72 __u8 tp_shadow_mcr;
73 __u8 tp_uart_mode; /* 232 or 485 modes */
74 unsigned int tp_uart_base_addr;
75 int tp_flags;
76 int tp_closing_wait;/* in .01 secs */
77 struct async_icount tp_icount;
78 wait_queue_head_t tp_msr_wait; /* wait for msr change */
79 wait_queue_head_t tp_write_wait;
80 struct ti_device *tp_tdev;
81 struct usb_serial_port *tp_port;
82 spinlock_t tp_lock;
83 int tp_read_urb_state;
84 int tp_write_urb_in_use;
85 struct kfifo write_fifo;
86 };
87
88 struct ti_device {
89 struct mutex td_open_close_lock;
90 int td_open_port_count;
91 struct usb_serial *td_serial;
92 int td_is_3410;
93 int td_urb_error;
94 };
95
96
97 /* Function Declarations */
98
99 static int ti_startup(struct usb_serial *serial);
100 static void ti_release(struct usb_serial *serial);
101 static int ti_port_probe(struct usb_serial_port *port);
102 static int ti_port_remove(struct usb_serial_port *port);
103 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
104 static void ti_close(struct usb_serial_port *port);
105 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
106 const unsigned char *data, int count);
107 static int ti_write_room(struct tty_struct *tty);
108 static int ti_chars_in_buffer(struct tty_struct *tty);
109 static void ti_throttle(struct tty_struct *tty);
110 static void ti_unthrottle(struct tty_struct *tty);
111 static int ti_ioctl(struct tty_struct *tty,
112 unsigned int cmd, unsigned long arg);
113 static int ti_get_icount(struct tty_struct *tty,
114 struct serial_icounter_struct *icount);
115 static void ti_set_termios(struct tty_struct *tty,
116 struct usb_serial_port *port, struct ktermios *old_termios);
117 static int ti_tiocmget(struct tty_struct *tty);
118 static int ti_tiocmset(struct tty_struct *tty,
119 unsigned int set, unsigned int clear);
120 static void ti_break(struct tty_struct *tty, int break_state);
121 static void ti_interrupt_callback(struct urb *urb);
122 static void ti_bulk_in_callback(struct urb *urb);
123 static void ti_bulk_out_callback(struct urb *urb);
124
125 static void ti_recv(struct device *dev, struct tty_struct *tty,
126 unsigned char *data, int length);
127 static void ti_send(struct ti_port *tport);
128 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
129 static int ti_get_lsr(struct ti_port *tport);
130 static int ti_get_serial_info(struct ti_port *tport,
131 struct serial_struct __user *ret_arg);
132 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
133 struct serial_struct __user *new_arg);
134 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
135
136 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
137
138 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
139 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
140
141 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
142 __u16 moduleid, __u16 value, __u8 *data, int size);
143 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
144 __u16 moduleid, __u16 value, __u8 *data, int size);
145
146 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
147 __u8 mask, __u8 byte);
148
149 static int ti_download_firmware(struct ti_device *tdev);
150
151
152 /* Data */
153
154 /* module parameters */
155 static bool debug;
156 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
157 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
158 static unsigned int vendor_3410_count;
159 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
160 static unsigned int product_3410_count;
161 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
162 static unsigned int vendor_5052_count;
163 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
164 static unsigned int product_5052_count;
165
166 /* supported devices */
167 /* the array dimension is the number of default entries plus */
168 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
169 /* null entry */
170 static struct usb_device_id ti_id_table_3410[15+TI_EXTRA_VID_PID_COUNT+1] = {
171 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
172 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
173 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
174 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
175 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
176 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
177 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
178 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
179 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
180 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
181 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
182 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
183 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
184 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
185 { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
186 };
187
188 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
189 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
190 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
191 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
192 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
193 };
194
195 static struct usb_device_id ti_id_table_combined[19+2*TI_EXTRA_VID_PID_COUNT+1] = {
196 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
197 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
198 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
199 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
200 { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
201 { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
202 { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
203 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
204 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
205 { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
206 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
207 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
208 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
209 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
210 { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
211 { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
212 { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
213 { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
214 { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
215 { }
216 };
217
218 static struct usb_serial_driver ti_1port_device = {
219 .driver = {
220 .owner = THIS_MODULE,
221 .name = "ti_usb_3410_5052_1",
222 },
223 .description = "TI USB 3410 1 port adapter",
224 .id_table = ti_id_table_3410,
225 .num_ports = 1,
226 .attach = ti_startup,
227 .release = ti_release,
228 .port_probe = ti_port_probe,
229 .port_remove = ti_port_remove,
230 .open = ti_open,
231 .close = ti_close,
232 .write = ti_write,
233 .write_room = ti_write_room,
234 .chars_in_buffer = ti_chars_in_buffer,
235 .throttle = ti_throttle,
236 .unthrottle = ti_unthrottle,
237 .ioctl = ti_ioctl,
238 .set_termios = ti_set_termios,
239 .tiocmget = ti_tiocmget,
240 .tiocmset = ti_tiocmset,
241 .get_icount = ti_get_icount,
242 .break_ctl = ti_break,
243 .read_int_callback = ti_interrupt_callback,
244 .read_bulk_callback = ti_bulk_in_callback,
245 .write_bulk_callback = ti_bulk_out_callback,
246 };
247
248 static struct usb_serial_driver ti_2port_device = {
249 .driver = {
250 .owner = THIS_MODULE,
251 .name = "ti_usb_3410_5052_2",
252 },
253 .description = "TI USB 5052 2 port adapter",
254 .id_table = ti_id_table_5052,
255 .num_ports = 2,
256 .attach = ti_startup,
257 .release = ti_release,
258 .port_probe = ti_port_probe,
259 .port_remove = ti_port_remove,
260 .open = ti_open,
261 .close = ti_close,
262 .write = ti_write,
263 .write_room = ti_write_room,
264 .chars_in_buffer = ti_chars_in_buffer,
265 .throttle = ti_throttle,
266 .unthrottle = ti_unthrottle,
267 .ioctl = ti_ioctl,
268 .set_termios = ti_set_termios,
269 .tiocmget = ti_tiocmget,
270 .tiocmset = ti_tiocmset,
271 .get_icount = ti_get_icount,
272 .break_ctl = ti_break,
273 .read_int_callback = ti_interrupt_callback,
274 .read_bulk_callback = ti_bulk_in_callback,
275 .write_bulk_callback = ti_bulk_out_callback,
276 };
277
278 static struct usb_serial_driver * const serial_drivers[] = {
279 &ti_1port_device, &ti_2port_device, NULL
280 };
281
282 /* Module */
283
284 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
285 MODULE_DESCRIPTION(TI_DRIVER_DESC);
286 MODULE_VERSION(TI_DRIVER_VERSION);
287 MODULE_LICENSE("GPL");
288
289 MODULE_FIRMWARE("ti_3410.fw");
290 MODULE_FIRMWARE("ti_5052.fw");
291 MODULE_FIRMWARE("mts_cdma.fw");
292 MODULE_FIRMWARE("mts_gsm.fw");
293 MODULE_FIRMWARE("mts_edge.fw");
294 MODULE_FIRMWARE("mts_mt9234mu.fw");
295 MODULE_FIRMWARE("mts_mt9234zba.fw");
296
297 module_param(debug, bool, S_IRUGO | S_IWUSR);
298 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
299
300 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
301 MODULE_PARM_DESC(closing_wait,
302 "Maximum wait for data to drain in close, in .01 secs, default is 4000");
303
304 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
305 MODULE_PARM_DESC(vendor_3410,
306 "Vendor ids for 3410 based devices, 1-5 short integers");
307 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
308 MODULE_PARM_DESC(product_3410,
309 "Product ids for 3410 based devices, 1-5 short integers");
310 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
311 MODULE_PARM_DESC(vendor_5052,
312 "Vendor ids for 5052 based devices, 1-5 short integers");
313 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
314 MODULE_PARM_DESC(product_5052,
315 "Product ids for 5052 based devices, 1-5 short integers");
316
317 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
318
319
320 /* Functions */
321
322 static int __init ti_init(void)
323 {
324 int i, j, c;
325 int ret;
326
327 /* insert extra vendor and product ids */
328 c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
329 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
330 for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
331 ti_id_table_3410[j].idVendor = vendor_3410[i];
332 ti_id_table_3410[j].idProduct = product_3410[i];
333 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
334 ti_id_table_combined[c].idVendor = vendor_3410[i];
335 ti_id_table_combined[c].idProduct = product_3410[i];
336 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
337 }
338 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
339 for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
340 ti_id_table_5052[j].idVendor = vendor_5052[i];
341 ti_id_table_5052[j].idProduct = product_5052[i];
342 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
343 ti_id_table_combined[c].idVendor = vendor_5052[i];
344 ti_id_table_combined[c].idProduct = product_5052[i];
345 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
346 }
347
348 ret = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined);
349 if (ret == 0)
350 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
351 TI_DRIVER_DESC "\n");
352 return ret;
353 }
354
355 static void __exit ti_exit(void)
356 {
357 usb_serial_deregister_drivers(serial_drivers);
358 }
359
360 module_init(ti_init);
361 module_exit(ti_exit);
362
363
364 static int ti_startup(struct usb_serial *serial)
365 {
366 struct ti_device *tdev;
367 struct usb_device *dev = serial->dev;
368 int status;
369
370 dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
371 __func__, le16_to_cpu(dev->descriptor.idProduct),
372 dev->descriptor.bNumConfigurations,
373 dev->actconfig->desc.bConfigurationValue);
374
375 /* create device structure */
376 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
377 if (tdev == NULL) {
378 dev_err(&dev->dev, "%s - out of memory\n", __func__);
379 return -ENOMEM;
380 }
381 mutex_init(&tdev->td_open_close_lock);
382 tdev->td_serial = serial;
383 usb_set_serial_data(serial, tdev);
384
385 /* determine device type */
386 if (usb_match_id(serial->interface, ti_id_table_3410))
387 tdev->td_is_3410 = 1;
388 dbg("%s - device type is %s", __func__,
389 tdev->td_is_3410 ? "3410" : "5052");
390
391 /* if we have only 1 configuration, download firmware */
392 if (dev->descriptor.bNumConfigurations == 1) {
393 status = ti_download_firmware(tdev);
394
395 if (status != 0)
396 goto free_tdev;
397
398 /* 3410 must be reset, 5052 resets itself */
399 if (tdev->td_is_3410) {
400 msleep_interruptible(100);
401 usb_reset_device(dev);
402 }
403
404 status = -ENODEV;
405 goto free_tdev;
406 }
407
408 /* the second configuration must be set */
409 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
410 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
411 status = status ? status : -ENODEV;
412 goto free_tdev;
413 }
414
415 return 0;
416
417 free_tdev:
418 kfree(tdev);
419 usb_set_serial_data(serial, NULL);
420 return status;
421 }
422
423
424 static void ti_release(struct usb_serial *serial)
425 {
426 struct ti_device *tdev = usb_get_serial_data(serial);
427
428 kfree(tdev);
429 }
430
431 static int ti_port_probe(struct usb_serial_port *port)
432 {
433 struct ti_port *tport;
434
435 tport = kzalloc(sizeof(*tport), GFP_KERNEL);
436 if (!tport)
437 return -ENOMEM;
438
439 spin_lock_init(&tport->tp_lock);
440 if (port == port->serial->port[0])
441 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
442 else
443 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
444 tport->tp_closing_wait = closing_wait;
445 init_waitqueue_head(&tport->tp_msr_wait);
446 init_waitqueue_head(&tport->tp_write_wait);
447 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE, GFP_KERNEL)) {
448 kfree(tport);
449 return -ENOMEM;
450 }
451 tport->tp_port = port;
452 tport->tp_tdev = usb_get_serial_data(port->serial);
453 tport->tp_uart_mode = 0; /* default is RS232 */
454
455 usb_set_serial_port_data(port, tport);
456
457 return 0;
458 }
459
460 static int ti_port_remove(struct usb_serial_port *port)
461 {
462 struct ti_port *tport;
463
464 tport = usb_get_serial_port_data(port);
465 kfifo_free(&tport->write_fifo);
466 kfree(tport);
467
468 return 0;
469 }
470
471 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
472 {
473 struct ti_port *tport = usb_get_serial_port_data(port);
474 struct ti_device *tdev;
475 struct usb_device *dev;
476 struct urb *urb;
477 int port_number;
478 int status;
479 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
480 TI_PIPE_TIMEOUT_ENABLE |
481 (TI_TRANSFER_TIMEOUT << 2));
482
483 if (tport == NULL)
484 return -ENODEV;
485
486 dev = port->serial->dev;
487 tdev = tport->tp_tdev;
488
489 /* only one open on any port on a device at a time */
490 if (mutex_lock_interruptible(&tdev->td_open_close_lock))
491 return -ERESTARTSYS;
492
493 port_number = port->number - port->serial->minor;
494
495 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
496
497 tport->tp_msr = 0;
498 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
499
500 /* start interrupt urb the first time a port is opened on this device */
501 if (tdev->td_open_port_count == 0) {
502 dbg("%s - start interrupt in urb", __func__);
503 urb = tdev->td_serial->port[0]->interrupt_in_urb;
504 if (!urb) {
505 dev_err(&port->dev, "%s - no interrupt urb\n",
506 __func__);
507 status = -EINVAL;
508 goto release_lock;
509 }
510 urb->context = tdev;
511 status = usb_submit_urb(urb, GFP_KERNEL);
512 if (status) {
513 dev_err(&port->dev,
514 "%s - submit interrupt urb failed, %d\n",
515 __func__, status);
516 goto release_lock;
517 }
518 }
519
520 if (tty)
521 ti_set_termios(tty, port, tty->termios);
522
523 dbg("%s - sending TI_OPEN_PORT", __func__);
524 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
525 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
526 if (status) {
527 dev_err(&port->dev, "%s - cannot send open command, %d\n",
528 __func__, status);
529 goto unlink_int_urb;
530 }
531
532 dbg("%s - sending TI_START_PORT", __func__);
533 status = ti_command_out_sync(tdev, TI_START_PORT,
534 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
535 if (status) {
536 dev_err(&port->dev, "%s - cannot send start command, %d\n",
537 __func__, status);
538 goto unlink_int_urb;
539 }
540
541 dbg("%s - sending TI_PURGE_PORT", __func__);
542 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
543 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
544 if (status) {
545 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
546 __func__, status);
547 goto unlink_int_urb;
548 }
549 status = ti_command_out_sync(tdev, TI_PURGE_PORT,
550 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
551 if (status) {
552 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
553 __func__, status);
554 goto unlink_int_urb;
555 }
556
557 /* reset the data toggle on the bulk endpoints to work around bug in
558 * host controllers where things get out of sync some times */
559 usb_clear_halt(dev, port->write_urb->pipe);
560 usb_clear_halt(dev, port->read_urb->pipe);
561
562 if (tty)
563 ti_set_termios(tty, port, tty->termios);
564
565 dbg("%s - sending TI_OPEN_PORT (2)", __func__);
566 status = ti_command_out_sync(tdev, TI_OPEN_PORT,
567 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
568 if (status) {
569 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
570 __func__, status);
571 goto unlink_int_urb;
572 }
573
574 dbg("%s - sending TI_START_PORT (2)", __func__);
575 status = ti_command_out_sync(tdev, TI_START_PORT,
576 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
577 if (status) {
578 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
579 __func__, status);
580 goto unlink_int_urb;
581 }
582
583 /* start read urb */
584 dbg("%s - start read urb", __func__);
585 urb = port->read_urb;
586 if (!urb) {
587 dev_err(&port->dev, "%s - no read urb\n", __func__);
588 status = -EINVAL;
589 goto unlink_int_urb;
590 }
591 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
592 urb->context = tport;
593 status = usb_submit_urb(urb, GFP_KERNEL);
594 if (status) {
595 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
596 __func__, status);
597 goto unlink_int_urb;
598 }
599
600 tport->tp_is_open = 1;
601 ++tdev->td_open_port_count;
602
603 goto release_lock;
604
605 unlink_int_urb:
606 if (tdev->td_open_port_count == 0)
607 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
608 release_lock:
609 mutex_unlock(&tdev->td_open_close_lock);
610 dbg("%s - exit %d", __func__, status);
611 return status;
612 }
613
614
615 static void ti_close(struct usb_serial_port *port)
616 {
617 struct ti_device *tdev;
618 struct ti_port *tport;
619 int port_number;
620 int status;
621 int do_unlock;
622
623 tdev = usb_get_serial_data(port->serial);
624 tport = usb_get_serial_port_data(port);
625 if (tdev == NULL || tport == NULL)
626 return;
627
628 tport->tp_is_open = 0;
629
630 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
631
632 usb_kill_urb(port->read_urb);
633 usb_kill_urb(port->write_urb);
634 tport->tp_write_urb_in_use = 0;
635
636 port_number = port->number - port->serial->minor;
637
638 dbg("%s - sending TI_CLOSE_PORT", __func__);
639 status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
640 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
641 if (status)
642 dev_err(&port->dev,
643 "%s - cannot send close port command, %d\n"
644 , __func__, status);
645
646 /* if mutex_lock is interrupted, continue anyway */
647 do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
648 --tport->tp_tdev->td_open_port_count;
649 if (tport->tp_tdev->td_open_port_count <= 0) {
650 /* last port is closed, shut down interrupt urb */
651 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
652 tport->tp_tdev->td_open_port_count = 0;
653 }
654 if (do_unlock)
655 mutex_unlock(&tdev->td_open_close_lock);
656 }
657
658
659 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
660 const unsigned char *data, int count)
661 {
662 struct ti_port *tport = usb_get_serial_port_data(port);
663
664 if (count == 0) {
665 dbg("%s - write request of 0 bytes", __func__);
666 return 0;
667 }
668
669 if (tport == NULL || !tport->tp_is_open)
670 return -ENODEV;
671
672 count = kfifo_in_locked(&tport->write_fifo, data, count,
673 &tport->tp_lock);
674 ti_send(tport);
675
676 return count;
677 }
678
679
680 static int ti_write_room(struct tty_struct *tty)
681 {
682 struct usb_serial_port *port = tty->driver_data;
683 struct ti_port *tport = usb_get_serial_port_data(port);
684 int room = 0;
685 unsigned long flags;
686
687 if (tport == NULL)
688 return 0;
689
690 spin_lock_irqsave(&tport->tp_lock, flags);
691 room = kfifo_avail(&tport->write_fifo);
692 spin_unlock_irqrestore(&tport->tp_lock, flags);
693
694 dbg("%s - returns %d", __func__, room);
695 return room;
696 }
697
698
699 static int ti_chars_in_buffer(struct tty_struct *tty)
700 {
701 struct usb_serial_port *port = tty->driver_data;
702 struct ti_port *tport = usb_get_serial_port_data(port);
703 int chars = 0;
704 unsigned long flags;
705
706 if (tport == NULL)
707 return 0;
708
709 spin_lock_irqsave(&tport->tp_lock, flags);
710 chars = kfifo_len(&tport->write_fifo);
711 spin_unlock_irqrestore(&tport->tp_lock, flags);
712
713 dbg("%s - returns %d", __func__, chars);
714 return chars;
715 }
716
717
718 static void ti_throttle(struct tty_struct *tty)
719 {
720 struct usb_serial_port *port = tty->driver_data;
721 struct ti_port *tport = usb_get_serial_port_data(port);
722
723 if (tport == NULL)
724 return;
725
726 if (I_IXOFF(tty) || C_CRTSCTS(tty))
727 ti_stop_read(tport, tty);
728
729 }
730
731
732 static void ti_unthrottle(struct tty_struct *tty)
733 {
734 struct usb_serial_port *port = tty->driver_data;
735 struct ti_port *tport = usb_get_serial_port_data(port);
736 int status;
737
738 if (tport == NULL)
739 return;
740
741 if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
742 status = ti_restart_read(tport, tty);
743 if (status)
744 dev_err(&port->dev, "%s - cannot restart read, %d\n",
745 __func__, status);
746 }
747 }
748
749 static int ti_get_icount(struct tty_struct *tty,
750 struct serial_icounter_struct *icount)
751 {
752 struct usb_serial_port *port = tty->driver_data;
753 struct ti_port *tport = usb_get_serial_port_data(port);
754 struct async_icount cnow = tport->tp_icount;
755
756 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
757 __func__, port->number,
758 cnow.rx, cnow.tx);
759
760 icount->cts = cnow.cts;
761 icount->dsr = cnow.dsr;
762 icount->rng = cnow.rng;
763 icount->dcd = cnow.dcd;
764 icount->rx = cnow.rx;
765 icount->tx = cnow.tx;
766 icount->frame = cnow.frame;
767 icount->overrun = cnow.overrun;
768 icount->parity = cnow.parity;
769 icount->brk = cnow.brk;
770 icount->buf_overrun = cnow.buf_overrun;
771
772 return 0;
773 }
774
775 static int ti_ioctl(struct tty_struct *tty,
776 unsigned int cmd, unsigned long arg)
777 {
778 struct usb_serial_port *port = tty->driver_data;
779 struct ti_port *tport = usb_get_serial_port_data(port);
780 struct async_icount cnow;
781 struct async_icount cprev;
782
783 dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
784
785 if (tport == NULL)
786 return -ENODEV;
787
788 switch (cmd) {
789 case TIOCGSERIAL:
790 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
791 return ti_get_serial_info(tport,
792 (struct serial_struct __user *)arg);
793 case TIOCSSERIAL:
794 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
795 return ti_set_serial_info(tty, tport,
796 (struct serial_struct __user *)arg);
797 case TIOCMIWAIT:
798 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
799 cprev = tport->tp_icount;
800 while (1) {
801 interruptible_sleep_on(&tport->tp_msr_wait);
802 if (signal_pending(current))
803 return -ERESTARTSYS;
804 cnow = tport->tp_icount;
805 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
806 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
807 return -EIO; /* no change => error */
808 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
809 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
810 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
811 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
812 return 0;
813 cprev = cnow;
814 }
815 break;
816 }
817 return -ENOIOCTLCMD;
818 }
819
820
821 static void ti_set_termios(struct tty_struct *tty,
822 struct usb_serial_port *port, struct ktermios *old_termios)
823 {
824 struct ti_port *tport = usb_get_serial_port_data(port);
825 struct ti_uart_config *config;
826 tcflag_t cflag, iflag;
827 int baud;
828 int status;
829 int port_number = port->number - port->serial->minor;
830 unsigned int mcr;
831
832 cflag = tty->termios->c_cflag;
833 iflag = tty->termios->c_iflag;
834
835 dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
836 dbg("%s - old clfag %08x, old iflag %08x", __func__,
837 old_termios->c_cflag, old_termios->c_iflag);
838
839 if (tport == NULL)
840 return;
841
842 config = kmalloc(sizeof(*config), GFP_KERNEL);
843 if (!config) {
844 dev_err(&port->dev, "%s - out of memory\n", __func__);
845 return;
846 }
847
848 config->wFlags = 0;
849
850 /* these flags must be set */
851 config->wFlags |= TI_UART_ENABLE_MS_INTS;
852 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
853 config->bUartMode = (__u8)(tport->tp_uart_mode);
854
855 switch (cflag & CSIZE) {
856 case CS5:
857 config->bDataBits = TI_UART_5_DATA_BITS;
858 break;
859 case CS6:
860 config->bDataBits = TI_UART_6_DATA_BITS;
861 break;
862 case CS7:
863 config->bDataBits = TI_UART_7_DATA_BITS;
864 break;
865 default:
866 case CS8:
867 config->bDataBits = TI_UART_8_DATA_BITS;
868 break;
869 }
870
871 /* CMSPAR isn't supported by this driver */
872 tty->termios->c_cflag &= ~CMSPAR;
873
874 if (cflag & PARENB) {
875 if (cflag & PARODD) {
876 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
877 config->bParity = TI_UART_ODD_PARITY;
878 } else {
879 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
880 config->bParity = TI_UART_EVEN_PARITY;
881 }
882 } else {
883 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
884 config->bParity = TI_UART_NO_PARITY;
885 }
886
887 if (cflag & CSTOPB)
888 config->bStopBits = TI_UART_2_STOP_BITS;
889 else
890 config->bStopBits = TI_UART_1_STOP_BITS;
891
892 if (cflag & CRTSCTS) {
893 /* RTS flow control must be off to drop RTS for baud rate B0 */
894 if ((cflag & CBAUD) != B0)
895 config->wFlags |= TI_UART_ENABLE_RTS_IN;
896 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
897 } else {
898 tty->hw_stopped = 0;
899 ti_restart_read(tport, tty);
900 }
901
902 if (I_IXOFF(tty) || I_IXON(tty)) {
903 config->cXon = START_CHAR(tty);
904 config->cXoff = STOP_CHAR(tty);
905
906 if (I_IXOFF(tty))
907 config->wFlags |= TI_UART_ENABLE_X_IN;
908 else
909 ti_restart_read(tport, tty);
910
911 if (I_IXON(tty))
912 config->wFlags |= TI_UART_ENABLE_X_OUT;
913 }
914
915 baud = tty_get_baud_rate(tty);
916 if (!baud)
917 baud = 9600;
918 if (tport->tp_tdev->td_is_3410)
919 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
920 else
921 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
922
923 /* FIXME: Should calculate resulting baud here and report it back */
924 if ((cflag & CBAUD) != B0)
925 tty_encode_baud_rate(tty, baud, baud);
926
927 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
928 __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
929
930 cpu_to_be16s(&config->wBaudRate);
931 cpu_to_be16s(&config->wFlags);
932
933 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
934 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
935 sizeof(*config));
936 if (status)
937 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
938 __func__, port_number, status);
939
940 /* SET_CONFIG asserts RTS and DTR, reset them correctly */
941 mcr = tport->tp_shadow_mcr;
942 /* if baud rate is B0, clear RTS and DTR */
943 if ((cflag & CBAUD) == B0)
944 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
945 status = ti_set_mcr(tport, mcr);
946 if (status)
947 dev_err(&port->dev,
948 "%s - cannot set modem control on port %d, %d\n",
949 __func__, port_number, status);
950
951 kfree(config);
952 }
953
954
955 static int ti_tiocmget(struct tty_struct *tty)
956 {
957 struct usb_serial_port *port = tty->driver_data;
958 struct ti_port *tport = usb_get_serial_port_data(port);
959 unsigned int result;
960 unsigned int msr;
961 unsigned int mcr;
962 unsigned long flags;
963
964 if (tport == NULL)
965 return -ENODEV;
966
967 spin_lock_irqsave(&tport->tp_lock, flags);
968 msr = tport->tp_msr;
969 mcr = tport->tp_shadow_mcr;
970 spin_unlock_irqrestore(&tport->tp_lock, flags);
971
972 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
973 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
974 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
975 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
976 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
977 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
978 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
979
980 dbg("%s - 0x%04X", __func__, result);
981
982 return result;
983 }
984
985
986 static int ti_tiocmset(struct tty_struct *tty,
987 unsigned int set, unsigned int clear)
988 {
989 struct usb_serial_port *port = tty->driver_data;
990 struct ti_port *tport = usb_get_serial_port_data(port);
991 unsigned int mcr;
992 unsigned long flags;
993
994 if (tport == NULL)
995 return -ENODEV;
996
997 spin_lock_irqsave(&tport->tp_lock, flags);
998 mcr = tport->tp_shadow_mcr;
999
1000 if (set & TIOCM_RTS)
1001 mcr |= TI_MCR_RTS;
1002 if (set & TIOCM_DTR)
1003 mcr |= TI_MCR_DTR;
1004 if (set & TIOCM_LOOP)
1005 mcr |= TI_MCR_LOOP;
1006
1007 if (clear & TIOCM_RTS)
1008 mcr &= ~TI_MCR_RTS;
1009 if (clear & TIOCM_DTR)
1010 mcr &= ~TI_MCR_DTR;
1011 if (clear & TIOCM_LOOP)
1012 mcr &= ~TI_MCR_LOOP;
1013 spin_unlock_irqrestore(&tport->tp_lock, flags);
1014
1015 return ti_set_mcr(tport, mcr);
1016 }
1017
1018
1019 static void ti_break(struct tty_struct *tty, int break_state)
1020 {
1021 struct usb_serial_port *port = tty->driver_data;
1022 struct ti_port *tport = usb_get_serial_port_data(port);
1023 int status;
1024
1025 dbg("%s - state = %d", __func__, break_state);
1026
1027 if (tport == NULL)
1028 return;
1029
1030 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1031
1032 status = ti_write_byte(tport->tp_tdev,
1033 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1034 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1035
1036 if (status)
1037 dbg("%s - error setting break, %d", __func__, status);
1038 }
1039
1040
1041 static void ti_interrupt_callback(struct urb *urb)
1042 {
1043 struct ti_device *tdev = urb->context;
1044 struct usb_serial_port *port;
1045 struct usb_serial *serial = tdev->td_serial;
1046 struct ti_port *tport;
1047 struct device *dev = &urb->dev->dev;
1048 unsigned char *data = urb->transfer_buffer;
1049 int length = urb->actual_length;
1050 int port_number;
1051 int function;
1052 int status = urb->status;
1053 int retval;
1054 __u8 msr;
1055
1056 switch (status) {
1057 case 0:
1058 break;
1059 case -ECONNRESET:
1060 case -ENOENT:
1061 case -ESHUTDOWN:
1062 dbg("%s - urb shutting down, %d", __func__, status);
1063 tdev->td_urb_error = 1;
1064 return;
1065 default:
1066 dev_err(dev, "%s - nonzero urb status, %d\n",
1067 __func__, status);
1068 tdev->td_urb_error = 1;
1069 goto exit;
1070 }
1071
1072 if (length != 2) {
1073 dbg("%s - bad packet size, %d", __func__, length);
1074 goto exit;
1075 }
1076
1077 if (data[0] == TI_CODE_HARDWARE_ERROR) {
1078 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1079 goto exit;
1080 }
1081
1082 port_number = TI_GET_PORT_FROM_CODE(data[0]);
1083 function = TI_GET_FUNC_FROM_CODE(data[0]);
1084
1085 dbg("%s - port_number %d, function %d, data 0x%02X",
1086 __func__, port_number, function, data[1]);
1087
1088 if (port_number >= serial->num_ports) {
1089 dev_err(dev, "%s - bad port number, %d\n",
1090 __func__, port_number);
1091 goto exit;
1092 }
1093
1094 port = serial->port[port_number];
1095
1096 tport = usb_get_serial_port_data(port);
1097 if (!tport)
1098 goto exit;
1099
1100 switch (function) {
1101 case TI_CODE_DATA_ERROR:
1102 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1103 __func__, port_number, data[1]);
1104 break;
1105
1106 case TI_CODE_MODEM_STATUS:
1107 msr = data[1];
1108 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1109 ti_handle_new_msr(tport, msr);
1110 break;
1111
1112 default:
1113 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1114 __func__, data[1]);
1115 break;
1116 }
1117
1118 exit:
1119 retval = usb_submit_urb(urb, GFP_ATOMIC);
1120 if (retval)
1121 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1122 __func__, retval);
1123 }
1124
1125
1126 static void ti_bulk_in_callback(struct urb *urb)
1127 {
1128 struct ti_port *tport = urb->context;
1129 struct usb_serial_port *port = tport->tp_port;
1130 struct device *dev = &urb->dev->dev;
1131 int status = urb->status;
1132 int retval = 0;
1133 struct tty_struct *tty;
1134
1135 switch (status) {
1136 case 0:
1137 break;
1138 case -ECONNRESET:
1139 case -ENOENT:
1140 case -ESHUTDOWN:
1141 dbg("%s - urb shutting down, %d", __func__, status);
1142 tport->tp_tdev->td_urb_error = 1;
1143 wake_up_interruptible(&tport->tp_write_wait);
1144 return;
1145 default:
1146 dev_err(dev, "%s - nonzero urb status, %d\n",
1147 __func__, status);
1148 tport->tp_tdev->td_urb_error = 1;
1149 wake_up_interruptible(&tport->tp_write_wait);
1150 }
1151
1152 if (status == -EPIPE)
1153 goto exit;
1154
1155 if (status) {
1156 dev_err(dev, "%s - stopping read!\n", __func__);
1157 return;
1158 }
1159
1160 tty = tty_port_tty_get(&port->port);
1161 if (tty) {
1162 if (urb->actual_length) {
1163 usb_serial_debug_data(debug, dev, __func__,
1164 urb->actual_length, urb->transfer_buffer);
1165
1166 if (!tport->tp_is_open)
1167 dbg("%s - port closed, dropping data",
1168 __func__);
1169 else
1170 ti_recv(&urb->dev->dev, tty,
1171 urb->transfer_buffer,
1172 urb->actual_length);
1173 spin_lock(&tport->tp_lock);
1174 tport->tp_icount.rx += urb->actual_length;
1175 spin_unlock(&tport->tp_lock);
1176 }
1177 tty_kref_put(tty);
1178 }
1179
1180 exit:
1181 /* continue to read unless stopping */
1182 spin_lock(&tport->tp_lock);
1183 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1184 retval = usb_submit_urb(urb, GFP_ATOMIC);
1185 else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1186 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1187
1188 spin_unlock(&tport->tp_lock);
1189 if (retval)
1190 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1191 __func__, retval);
1192 }
1193
1194
1195 static void ti_bulk_out_callback(struct urb *urb)
1196 {
1197 struct ti_port *tport = urb->context;
1198 struct usb_serial_port *port = tport->tp_port;
1199 int status = urb->status;
1200
1201 tport->tp_write_urb_in_use = 0;
1202
1203 switch (status) {
1204 case 0:
1205 break;
1206 case -ECONNRESET:
1207 case -ENOENT:
1208 case -ESHUTDOWN:
1209 dbg("%s - urb shutting down, %d", __func__, status);
1210 tport->tp_tdev->td_urb_error = 1;
1211 wake_up_interruptible(&tport->tp_write_wait);
1212 return;
1213 default:
1214 dev_err_console(port, "%s - nonzero urb status, %d\n",
1215 __func__, status);
1216 tport->tp_tdev->td_urb_error = 1;
1217 wake_up_interruptible(&tport->tp_write_wait);
1218 }
1219
1220 /* send any buffered data */
1221 ti_send(tport);
1222 }
1223
1224
1225 static void ti_recv(struct device *dev, struct tty_struct *tty,
1226 unsigned char *data, int length)
1227 {
1228 int cnt;
1229
1230 do {
1231 cnt = tty_insert_flip_string(tty, data, length);
1232 if (cnt < length) {
1233 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1234 __func__, length - cnt);
1235 if (cnt == 0)
1236 break;
1237 }
1238 tty_flip_buffer_push(tty);
1239 data += cnt;
1240 length -= cnt;
1241 } while (length > 0);
1242
1243 }
1244
1245
1246 static void ti_send(struct ti_port *tport)
1247 {
1248 int count, result;
1249 struct usb_serial_port *port = tport->tp_port;
1250 struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1251 unsigned long flags;
1252
1253 spin_lock_irqsave(&tport->tp_lock, flags);
1254
1255 if (tport->tp_write_urb_in_use)
1256 goto unlock;
1257
1258 count = kfifo_out(&tport->write_fifo,
1259 port->write_urb->transfer_buffer,
1260 port->bulk_out_size);
1261
1262 if (count == 0)
1263 goto unlock;
1264
1265 tport->tp_write_urb_in_use = 1;
1266
1267 spin_unlock_irqrestore(&tport->tp_lock, flags);
1268
1269 usb_serial_debug_data(debug, &port->dev, __func__, count,
1270 port->write_urb->transfer_buffer);
1271
1272 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1273 usb_sndbulkpipe(port->serial->dev,
1274 port->bulk_out_endpointAddress),
1275 port->write_urb->transfer_buffer, count,
1276 ti_bulk_out_callback, tport);
1277
1278 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1279 if (result) {
1280 dev_err_console(port, "%s - submit write urb failed, %d\n",
1281 __func__, result);
1282 tport->tp_write_urb_in_use = 0;
1283 /* TODO: reschedule ti_send */
1284 } else {
1285 spin_lock_irqsave(&tport->tp_lock, flags);
1286 tport->tp_icount.tx += count;
1287 spin_unlock_irqrestore(&tport->tp_lock, flags);
1288 }
1289
1290 /* more room in the buffer for new writes, wakeup */
1291 if (tty)
1292 tty_wakeup(tty);
1293 tty_kref_put(tty);
1294 wake_up_interruptible(&tport->tp_write_wait);
1295 return;
1296 unlock:
1297 spin_unlock_irqrestore(&tport->tp_lock, flags);
1298 tty_kref_put(tty);
1299 return;
1300 }
1301
1302
1303 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1304 {
1305 unsigned long flags;
1306 int status;
1307
1308 status = ti_write_byte(tport->tp_tdev,
1309 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1310 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1311
1312 spin_lock_irqsave(&tport->tp_lock, flags);
1313 if (!status)
1314 tport->tp_shadow_mcr = mcr;
1315 spin_unlock_irqrestore(&tport->tp_lock, flags);
1316
1317 return status;
1318 }
1319
1320
1321 static int ti_get_lsr(struct ti_port *tport)
1322 {
1323 int size, status;
1324 struct ti_device *tdev = tport->tp_tdev;
1325 struct usb_serial_port *port = tport->tp_port;
1326 int port_number = port->number - port->serial->minor;
1327 struct ti_port_status *data;
1328
1329 size = sizeof(struct ti_port_status);
1330 data = kmalloc(size, GFP_KERNEL);
1331 if (!data) {
1332 dev_err(&port->dev, "%s - out of memory\n", __func__);
1333 return -ENOMEM;
1334 }
1335
1336 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1337 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1338 if (status) {
1339 dev_err(&port->dev,
1340 "%s - get port status command failed, %d\n",
1341 __func__, status);
1342 goto free_data;
1343 }
1344
1345 dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1346
1347 tport->tp_lsr = data->bLSR;
1348
1349 free_data:
1350 kfree(data);
1351 return status;
1352 }
1353
1354
1355 static int ti_get_serial_info(struct ti_port *tport,
1356 struct serial_struct __user *ret_arg)
1357 {
1358 struct usb_serial_port *port = tport->tp_port;
1359 struct serial_struct ret_serial;
1360
1361 if (!ret_arg)
1362 return -EFAULT;
1363
1364 memset(&ret_serial, 0, sizeof(ret_serial));
1365
1366 ret_serial.type = PORT_16550A;
1367 ret_serial.line = port->serial->minor;
1368 ret_serial.port = port->number - port->serial->minor;
1369 ret_serial.flags = tport->tp_flags;
1370 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1371 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1372 ret_serial.closing_wait = tport->tp_closing_wait;
1373
1374 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1375 return -EFAULT;
1376
1377 return 0;
1378 }
1379
1380
1381 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1382 struct serial_struct __user *new_arg)
1383 {
1384 struct serial_struct new_serial;
1385
1386 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1387 return -EFAULT;
1388
1389 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1390 tport->tp_closing_wait = new_serial.closing_wait;
1391
1392 return 0;
1393 }
1394
1395
1396 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1397 {
1398 struct async_icount *icount;
1399 struct tty_struct *tty;
1400 unsigned long flags;
1401
1402 dbg("%s - msr 0x%02X", __func__, msr);
1403
1404 if (msr & TI_MSR_DELTA_MASK) {
1405 spin_lock_irqsave(&tport->tp_lock, flags);
1406 icount = &tport->tp_icount;
1407 if (msr & TI_MSR_DELTA_CTS)
1408 icount->cts++;
1409 if (msr & TI_MSR_DELTA_DSR)
1410 icount->dsr++;
1411 if (msr & TI_MSR_DELTA_CD)
1412 icount->dcd++;
1413 if (msr & TI_MSR_DELTA_RI)
1414 icount->rng++;
1415 wake_up_interruptible(&tport->tp_msr_wait);
1416 spin_unlock_irqrestore(&tport->tp_lock, flags);
1417 }
1418
1419 tport->tp_msr = msr & TI_MSR_MASK;
1420
1421 /* handle CTS flow control */
1422 tty = tty_port_tty_get(&tport->tp_port->port);
1423 if (tty && C_CRTSCTS(tty)) {
1424 if (msr & TI_MSR_CTS) {
1425 tty->hw_stopped = 0;
1426 tty_wakeup(tty);
1427 } else {
1428 tty->hw_stopped = 1;
1429 }
1430 }
1431 tty_kref_put(tty);
1432 }
1433
1434
1435 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1436 {
1437 struct ti_device *tdev = tport->tp_tdev;
1438 struct usb_serial_port *port = tport->tp_port;
1439 wait_queue_t wait;
1440
1441 spin_lock_irq(&tport->tp_lock);
1442
1443 /* wait for data to drain from the buffer */
1444 tdev->td_urb_error = 0;
1445 init_waitqueue_entry(&wait, current);
1446 add_wait_queue(&tport->tp_write_wait, &wait);
1447 for (;;) {
1448 set_current_state(TASK_INTERRUPTIBLE);
1449 if (kfifo_len(&tport->write_fifo) == 0
1450 || timeout == 0 || signal_pending(current)
1451 || tdev->td_urb_error
1452 || port->serial->disconnected) /* disconnect */
1453 break;
1454 spin_unlock_irq(&tport->tp_lock);
1455 timeout = schedule_timeout(timeout);
1456 spin_lock_irq(&tport->tp_lock);
1457 }
1458 set_current_state(TASK_RUNNING);
1459 remove_wait_queue(&tport->tp_write_wait, &wait);
1460
1461 /* flush any remaining data in the buffer */
1462 if (flush)
1463 kfifo_reset_out(&tport->write_fifo);
1464
1465 spin_unlock_irq(&tport->tp_lock);
1466
1467 mutex_lock(&port->serial->disc_mutex);
1468 /* wait for data to drain from the device */
1469 /* wait for empty tx register, plus 20 ms */
1470 timeout += jiffies;
1471 tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1472 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1473 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1474 && !port->serial->disconnected) {
1475 if (ti_get_lsr(tport))
1476 break;
1477 mutex_unlock(&port->serial->disc_mutex);
1478 msleep_interruptible(20);
1479 mutex_lock(&port->serial->disc_mutex);
1480 }
1481 mutex_unlock(&port->serial->disc_mutex);
1482 }
1483
1484
1485 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1486 {
1487 unsigned long flags;
1488
1489 spin_lock_irqsave(&tport->tp_lock, flags);
1490
1491 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1492 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1493
1494 spin_unlock_irqrestore(&tport->tp_lock, flags);
1495 }
1496
1497
1498 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1499 {
1500 struct urb *urb;
1501 int status = 0;
1502 unsigned long flags;
1503
1504 spin_lock_irqsave(&tport->tp_lock, flags);
1505
1506 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1507 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1508 urb = tport->tp_port->read_urb;
1509 spin_unlock_irqrestore(&tport->tp_lock, flags);
1510 urb->context = tport;
1511 status = usb_submit_urb(urb, GFP_KERNEL);
1512 } else {
1513 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1514 spin_unlock_irqrestore(&tport->tp_lock, flags);
1515 }
1516
1517 return status;
1518 }
1519
1520
1521 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1522 __u16 moduleid, __u16 value, __u8 *data, int size)
1523 {
1524 int status;
1525
1526 status = usb_control_msg(tdev->td_serial->dev,
1527 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1528 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1529 value, moduleid, data, size, 1000);
1530
1531 if (status == size)
1532 status = 0;
1533
1534 if (status > 0)
1535 status = -ECOMM;
1536
1537 return status;
1538 }
1539
1540
1541 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1542 __u16 moduleid, __u16 value, __u8 *data, int size)
1543 {
1544 int status;
1545
1546 status = usb_control_msg(tdev->td_serial->dev,
1547 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1548 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1549 value, moduleid, data, size, 1000);
1550
1551 if (status == size)
1552 status = 0;
1553
1554 if (status > 0)
1555 status = -ECOMM;
1556
1557 return status;
1558 }
1559
1560
1561 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1562 __u8 mask, __u8 byte)
1563 {
1564 int status;
1565 unsigned int size;
1566 struct ti_write_data_bytes *data;
1567 struct device *dev = &tdev->td_serial->dev->dev;
1568
1569 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1570 __func__, addr, mask, byte);
1571
1572 size = sizeof(struct ti_write_data_bytes) + 2;
1573 data = kmalloc(size, GFP_KERNEL);
1574 if (!data) {
1575 dev_err(dev, "%s - out of memory\n", __func__);
1576 return -ENOMEM;
1577 }
1578
1579 data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1580 data->bDataType = TI_RW_DATA_BYTE;
1581 data->bDataCounter = 1;
1582 data->wBaseAddrHi = cpu_to_be16(addr>>16);
1583 data->wBaseAddrLo = cpu_to_be16(addr);
1584 data->bData[0] = mask;
1585 data->bData[1] = byte;
1586
1587 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1588 (__u8 *)data, size);
1589
1590 if (status < 0)
1591 dev_err(dev, "%s - failed, %d\n", __func__, status);
1592
1593 kfree(data);
1594
1595 return status;
1596 }
1597
1598 static int ti_do_download(struct usb_device *dev, int pipe,
1599 u8 *buffer, int size)
1600 {
1601 int pos;
1602 u8 cs = 0;
1603 int done;
1604 struct ti_firmware_header *header;
1605 int status = 0;
1606 int len;
1607
1608 for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1609 cs = (__u8)(cs + buffer[pos]);
1610
1611 header = (struct ti_firmware_header *)buffer;
1612 header->wLength = cpu_to_le16((__u16)(size
1613 - sizeof(struct ti_firmware_header)));
1614 header->bCheckSum = cs;
1615
1616 dbg("%s - downloading firmware", __func__);
1617 for (pos = 0; pos < size; pos += done) {
1618 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1619 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1620 &done, 1000);
1621 if (status)
1622 break;
1623 }
1624 return status;
1625 }
1626
1627 static int ti_download_firmware(struct ti_device *tdev)
1628 {
1629 int status;
1630 int buffer_size;
1631 __u8 *buffer;
1632 struct usb_device *dev = tdev->td_serial->dev;
1633 unsigned int pipe = usb_sndbulkpipe(dev,
1634 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1635 const struct firmware *fw_p;
1636 char buf[32];
1637
1638 /* try ID specific firmware first, then try generic firmware */
1639 sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1640 dev->descriptor.idProduct);
1641 status = request_firmware(&fw_p, buf, &dev->dev);
1642
1643 if (status != 0) {
1644 buf[0] = '\0';
1645 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1646 switch (dev->descriptor.idProduct) {
1647 case MTS_CDMA_PRODUCT_ID:
1648 strcpy(buf, "mts_cdma.fw");
1649 break;
1650 case MTS_GSM_PRODUCT_ID:
1651 strcpy(buf, "mts_gsm.fw");
1652 break;
1653 case MTS_EDGE_PRODUCT_ID:
1654 strcpy(buf, "mts_edge.fw");
1655 break;
1656 case MTS_MT9234MU_PRODUCT_ID:
1657 strcpy(buf, "mts_mt9234mu.fw");
1658 break;
1659 case MTS_MT9234ZBA_PRODUCT_ID:
1660 strcpy(buf, "mts_mt9234zba.fw");
1661 break;
1662 case MTS_MT9234ZBAOLD_PRODUCT_ID:
1663 strcpy(buf, "mts_mt9234zba.fw");
1664 break; }
1665 }
1666 if (buf[0] == '\0') {
1667 if (tdev->td_is_3410)
1668 strcpy(buf, "ti_3410.fw");
1669 else
1670 strcpy(buf, "ti_5052.fw");
1671 }
1672 status = request_firmware(&fw_p, buf, &dev->dev);
1673 }
1674 if (status) {
1675 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1676 return -ENOENT;
1677 }
1678 if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1679 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1680 release_firmware(fw_p);
1681 return -ENOENT;
1682 }
1683
1684 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1685 buffer = kmalloc(buffer_size, GFP_KERNEL);
1686 if (buffer) {
1687 memcpy(buffer, fw_p->data, fw_p->size);
1688 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1689 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1690 kfree(buffer);
1691 } else {
1692 dbg("%s ENOMEM\n", __func__);
1693 status = -ENOMEM;
1694 }
1695 release_firmware(fw_p);
1696 if (status) {
1697 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1698 __func__, status);
1699 return status;
1700 }
1701
1702 dbg("%s - download successful", __func__);
1703
1704 return 0;
1705 }
Linux ARM platform port for MOXA ART SoC