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0f64478c GKH |
1 | /* |
2 | * mos7720.c | |
3 | * Controls the Moschip 7720 usb to dual port serial convertor | |
4 | * | |
5 | * Copyright 2006 Moschip Semiconductor Tech. Ltd. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, version 2 of the License. | |
10 | * | |
11 | * Developed by: | |
12 | * VijayaKumar.G.N. <vijaykumar@aspirecom.net> | |
13 | * AjayKumar <ajay@aspirecom.net> | |
14 | * Gurudeva.N. <gurudev@aspirecom.net> | |
15 | * | |
16 | * Cleaned up from the original by: | |
17 | * Greg Kroah-Hartman <gregkh@suse.de> | |
18 | * | |
19 | * Originally based on drivers/usb/serial/io_edgeport.c which is: | |
20 | * Copyright (C) 2000 Inside Out Networks, All rights reserved. | |
21 | * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> | |
22 | */ | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/tty.h> | |
28 | #include <linux/tty_driver.h> | |
29 | #include <linux/tty_flip.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/spinlock.h> | |
32 | #include <linux/serial.h> | |
33 | #include <linux/serial_reg.h> | |
34 | #include <linux/usb.h> | |
35 | #include <linux/usb/serial.h> | |
36 | #include <asm/uaccess.h> | |
37 | ||
38 | ||
39 | /* | |
40 | * Version Information | |
41 | */ | |
42 | #define DRIVER_VERSION "1.0.0.4F" | |
43 | #define DRIVER_AUTHOR "Aspire Communications pvt Ltd." | |
44 | #define DRIVER_DESC "Moschip USB Serial Driver" | |
45 | ||
46 | /* default urb timeout */ | |
47 | #define MOS_WDR_TIMEOUT (HZ * 5) | |
48 | ||
49 | #define MOS_PORT1 0x0200 | |
50 | #define MOS_PORT2 0x0300 | |
51 | #define MOS_VENREG 0x0000 | |
52 | #define MOS_MAX_PORT 0x02 | |
53 | #define MOS_WRITE 0x0E | |
54 | #define MOS_READ 0x0D | |
55 | ||
56 | /* Interrupt Rotinue Defines */ | |
57 | #define SERIAL_IIR_RLS 0x06 | |
58 | #define SERIAL_IIR_RDA 0x04 | |
59 | #define SERIAL_IIR_CTI 0x0c | |
60 | #define SERIAL_IIR_THR 0x02 | |
61 | #define SERIAL_IIR_MS 0x00 | |
62 | ||
63 | #define NUM_URBS 16 /* URB Count */ | |
64 | #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ | |
65 | ||
66 | /* This structure holds all of the local port information */ | |
67 | struct moschip_port | |
68 | { | |
69 | __u8 shadowLCR; /* last LCR value received */ | |
70 | __u8 shadowMCR; /* last MCR value received */ | |
71 | __u8 shadowMSR; /* last MSR value received */ | |
72 | char open; | |
73 | struct async_icount icount; | |
74 | struct usb_serial_port *port; /* loop back to the owner */ | |
75 | struct urb *write_urb_pool[NUM_URBS]; | |
76 | }; | |
77 | ||
78 | /* This structure holds all of the individual serial device information */ | |
79 | struct moschip_serial | |
80 | { | |
81 | int interrupt_started; | |
82 | }; | |
83 | ||
84 | static int debug; | |
85 | ||
86 | #define USB_VENDOR_ID_MOSCHIP 0x9710 | |
87 | #define MOSCHIP_DEVICE_ID_7720 0x7720 | |
88 | #define MOSCHIP_DEVICE_ID_7715 0x7715 | |
89 | ||
90 | static struct usb_device_id moschip_port_id_table [] = { | |
91 | { USB_DEVICE(USB_VENDOR_ID_MOSCHIP,MOSCHIP_DEVICE_ID_7720) }, | |
92 | { } /* terminating entry */ | |
93 | }; | |
94 | MODULE_DEVICE_TABLE(usb, moschip_port_id_table); | |
95 | ||
96 | ||
97 | /* | |
98 | * mos7720_interrupt_callback | |
99 | * this is the callback function for when we have received data on the | |
100 | * interrupt endpoint. | |
101 | */ | |
102 | static void mos7720_interrupt_callback(struct urb *urb) | |
103 | { | |
104 | int result; | |
105 | int length; | |
106 | __u32 *data; | |
107 | unsigned int status; | |
108 | __u8 sp1; | |
109 | __u8 sp2; | |
110 | __u8 st; | |
111 | ||
112 | dbg("%s"," : Entering\n"); | |
113 | ||
114 | if (!urb) { | |
115 | dbg("%s","Invalid Pointer !!!!:\n"); | |
116 | return; | |
117 | } | |
118 | ||
119 | switch (urb->status) { | |
120 | case 0: | |
121 | /* success */ | |
122 | break; | |
123 | case -ECONNRESET: | |
124 | case -ENOENT: | |
125 | case -ESHUTDOWN: | |
126 | /* this urb is terminated, clean up */ | |
127 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, | |
128 | urb->status); | |
129 | return; | |
130 | default: | |
131 | dbg("%s - nonzero urb status received: %d", __FUNCTION__, | |
132 | urb->status); | |
133 | goto exit; | |
134 | } | |
135 | ||
136 | length = urb->actual_length; | |
137 | data = urb->transfer_buffer; | |
138 | ||
139 | /* Moschip get 4 bytes | |
140 | * Byte 1 IIR Port 1 (port.number is 0) | |
141 | * Byte 2 IIR Port 2 (port.number is 1) | |
142 | * Byte 3 -------------- | |
143 | * Byte 4 FIFO status for both */ | |
144 | if (length && length > 4) { | |
145 | dbg("Wrong data !!!"); | |
146 | return; | |
147 | } | |
148 | ||
149 | status = *data; | |
150 | ||
151 | sp1 = (status & 0xff000000)>>24; | |
152 | sp2 = (status & 0x00ff0000)>>16; | |
153 | st = status & 0x000000ff; | |
154 | ||
155 | if ((sp1 & 0x01) || (sp2 & 0x01)) { | |
156 | /* No Interrupt Pending in both the ports */ | |
157 | dbg("No Interrupt !!!"); | |
158 | } else { | |
159 | switch (sp1 & 0x0f) { | |
160 | case SERIAL_IIR_RLS: | |
161 | dbg("Serial Port 1: Receiver status error or address " | |
162 | "bit detected in 9-bit mode\n"); | |
163 | break; | |
164 | case SERIAL_IIR_CTI: | |
165 | dbg("Serial Port 1: Receiver time out"); | |
166 | break; | |
167 | case SERIAL_IIR_MS: | |
168 | dbg("Serial Port 1: Modem status change"); | |
169 | break; | |
170 | } | |
171 | ||
172 | switch (sp2 & 0x0f) { | |
173 | case SERIAL_IIR_RLS: | |
174 | dbg("Serial Port 2: Receiver status error or address " | |
175 | "bit detected in 9-bit mode"); | |
176 | break; | |
177 | case SERIAL_IIR_CTI: | |
178 | dbg("Serial Port 2: Receiver time out"); | |
179 | break; | |
180 | case SERIAL_IIR_MS: | |
181 | dbg("Serial Port 2: Modem status change"); | |
182 | break; | |
183 | } | |
184 | } | |
185 | ||
186 | exit: | |
187 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
188 | if (result) | |
189 | dev_err(&urb->dev->dev, | |
190 | "%s - Error %d submitting control urb\n", | |
191 | __FUNCTION__, result); | |
192 | return; | |
193 | } | |
194 | ||
195 | /* | |
196 | * mos7720_bulk_in_callback | |
197 | * this is the callback function for when we have received data on the | |
198 | * bulk in endpoint. | |
199 | */ | |
200 | static void mos7720_bulk_in_callback(struct urb *urb) | |
201 | { | |
202 | int status; | |
203 | unsigned char *data ; | |
204 | struct usb_serial_port *port; | |
205 | struct moschip_port *mos7720_port; | |
206 | struct tty_struct *tty; | |
207 | ||
208 | if (urb->status) { | |
209 | dbg("nonzero read bulk status received: %d",urb->status); | |
210 | return; | |
211 | } | |
212 | ||
213 | mos7720_port = urb->context; | |
214 | if (!mos7720_port) { | |
215 | dbg("%s","NULL mos7720_port pointer \n"); | |
216 | return ; | |
217 | } | |
218 | ||
219 | port = mos7720_port->port; | |
220 | ||
221 | dbg("Entering...%s", __FUNCTION__); | |
222 | ||
223 | data = urb->transfer_buffer; | |
224 | ||
225 | tty = port->tty; | |
226 | if (tty && urb->actual_length) { | |
227 | tty_buffer_request_room(tty, urb->actual_length); | |
228 | tty_insert_flip_string(tty, data, urb->actual_length); | |
229 | tty_flip_buffer_push(tty); | |
230 | } | |
231 | ||
232 | if (!port->read_urb) { | |
233 | dbg("URB KILLED !!!"); | |
234 | return; | |
235 | } | |
236 | ||
237 | if (port->read_urb->status != -EINPROGRESS) { | |
238 | port->read_urb->dev = port->serial->dev; | |
239 | ||
240 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
241 | if (status) | |
242 | dbg("usb_submit_urb(read bulk) failed, status = %d", | |
243 | status); | |
244 | } | |
245 | } | |
246 | ||
247 | /* | |
248 | * mos7720_bulk_out_data_callback | |
249 | * this is the callback function for when we have finished sending serial | |
250 | * data on the bulk out endpoint. | |
251 | */ | |
252 | static void mos7720_bulk_out_data_callback(struct urb *urb) | |
253 | { | |
254 | struct moschip_port *mos7720_port; | |
255 | struct tty_struct *tty; | |
256 | ||
257 | if (urb->status) { | |
258 | dbg("nonzero write bulk status received:%d", urb->status); | |
259 | return; | |
260 | } | |
261 | ||
262 | mos7720_port = urb->context; | |
263 | if (!mos7720_port) { | |
264 | dbg("NULL mos7720_port pointer"); | |
265 | return ; | |
266 | } | |
267 | ||
268 | dbg("Entering ........."); | |
269 | ||
270 | tty = mos7720_port->port->tty; | |
271 | ||
272 | if (tty && mos7720_port->open) { | |
273 | /* let the tty driver wakeup if it has a special * | |
274 | * write_wakeup function */ | |
275 | if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && | |
276 | tty->ldisc.write_wakeup) | |
277 | (tty->ldisc.write_wakeup)(tty); | |
278 | ||
279 | /* tell the tty driver that something has changed */ | |
280 | wake_up_interruptible(&tty->write_wait); | |
281 | } | |
282 | ||
283 | /* schedule_work(&mos7720_port->port->work); */ | |
284 | } | |
285 | ||
286 | /* | |
287 | * send_mos_cmd | |
288 | * this function will be used for sending command to device | |
289 | */ | |
290 | static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value, | |
291 | __u16 index, void *data) | |
292 | { | |
293 | int status; | |
294 | unsigned int pipe; | |
295 | u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); | |
296 | __u8 requesttype; | |
297 | __u16 size = 0x0000; | |
298 | ||
299 | if (value < MOS_MAX_PORT) { | |
300 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
301 | value = value*0x100+0x100; | |
302 | } else { | |
303 | value = value*0x100+0x200; | |
304 | } | |
305 | } else { | |
306 | value = 0x0000; | |
307 | if ((product == MOSCHIP_DEVICE_ID_7715) && | |
308 | (index != 0x08)) { | |
309 | dbg("serial->product== MOSCHIP_DEVICE_ID_7715"); | |
310 | //index = 0x01 ; | |
311 | } | |
312 | } | |
313 | ||
314 | if (request == MOS_WRITE) { | |
315 | request = (__u8)MOS_WRITE; | |
316 | requesttype = (__u8)0x40; | |
317 | value = value + (__u16)*((unsigned char *)data); | |
318 | data = NULL; | |
319 | pipe = usb_sndctrlpipe(serial->dev, 0); | |
320 | } else { | |
321 | request = (__u8)MOS_READ; | |
322 | requesttype = (__u8)0xC0; | |
323 | size = 0x01; | |
324 | pipe = usb_rcvctrlpipe(serial->dev,0); | |
325 | } | |
326 | ||
327 | status = usb_control_msg(serial->dev, pipe, request, requesttype, | |
328 | value, index, data, size, MOS_WDR_TIMEOUT); | |
329 | ||
330 | if (status < 0) | |
331 | dbg("Command Write failed Value %x index %x\n",value,index); | |
332 | ||
333 | return status; | |
334 | } | |
335 | ||
336 | static int mos7720_open(struct usb_serial_port *port, struct file * filp) | |
337 | { | |
338 | struct usb_serial *serial; | |
339 | struct usb_serial_port *port0; | |
340 | struct urb *urb; | |
341 | struct moschip_serial *mos7720_serial; | |
342 | struct moschip_port *mos7720_port; | |
343 | int response; | |
344 | int port_number; | |
345 | char data; | |
346 | int j; | |
347 | ||
348 | serial = port->serial; | |
349 | ||
350 | mos7720_port = usb_get_serial_port_data(port); | |
351 | if (mos7720_port == NULL) | |
352 | return -ENODEV; | |
353 | ||
354 | port0 = serial->port[0]; | |
355 | ||
356 | mos7720_serial = usb_get_serial_data(serial); | |
357 | ||
358 | if (mos7720_serial == NULL || port0 == NULL) | |
359 | return -ENODEV; | |
360 | ||
361 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
362 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
363 | ||
364 | /* Initialising the write urb pool */ | |
365 | for (j = 0; j < NUM_URBS; ++j) { | |
54e6ecb2 | 366 | urb = usb_alloc_urb(0,GFP_ATOMIC); |
0f64478c GKH |
367 | mos7720_port->write_urb_pool[j] = urb; |
368 | ||
369 | if (urb == NULL) { | |
370 | err("No more urbs???"); | |
371 | continue; | |
372 | } | |
373 | ||
374 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
375 | GFP_KERNEL); | |
376 | if (!urb->transfer_buffer) { | |
377 | err("%s-out of memory for urb buffers.", __FUNCTION__); | |
378 | continue; | |
379 | } | |
380 | } | |
381 | ||
382 | /* Initialize MCS7720 -- Write Init values to corresponding Registers | |
383 | * | |
384 | * Register Index | |
385 | * 1 : IER | |
386 | * 2 : FCR | |
387 | * 3 : LCR | |
388 | * 4 : MCR | |
389 | * | |
390 | * 0x08 : SP1/2 Control Reg | |
391 | */ | |
392 | port_number = port->number - port->serial->minor; | |
393 | send_mos_cmd(port->serial, MOS_READ, port_number, UART_LSR, &data); | |
394 | dbg("SS::%p LSR:%x\n",mos7720_port, data); | |
395 | ||
396 | dbg("Check:Sending Command .........."); | |
397 | ||
398 | data = 0x02; | |
399 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x01, &data); | |
400 | data = 0x02; | |
401 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x02, &data); | |
402 | ||
403 | data = 0x00; | |
404 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
405 | data = 0x00; | |
406 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data); | |
407 | ||
408 | data = 0xCF; | |
409 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data); | |
410 | data = 0x03; | |
411 | mos7720_port->shadowLCR = data; | |
412 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
413 | data = 0x0b; | |
414 | mos7720_port->shadowMCR = data; | |
415 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
416 | data = 0x0b; | |
417 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
418 | ||
419 | data = 0x00; | |
420 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); | |
421 | data = 0x00; | |
422 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); | |
423 | ||
424 | /* data = 0x00; | |
425 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, port_number + 1, &data); | |
426 | data = 0x03; | |
427 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data); | |
428 | data = 0x00; | |
429 | send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data); | |
430 | */ | |
431 | data = 0x00; | |
432 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); | |
433 | ||
434 | data = data | (port->number - port->serial->minor + 1); | |
435 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); | |
436 | ||
437 | data = 0x83; | |
438 | mos7720_port->shadowLCR = data; | |
439 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
440 | data = 0x0c; | |
441 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data); | |
442 | data = 0x00; | |
443 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
444 | data = 0x03; | |
445 | mos7720_port->shadowLCR = data; | |
446 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
447 | data = 0x0c; | |
448 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
449 | data = 0x0c; | |
450 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
451 | ||
452 | //Matrix | |
453 | ||
454 | /* force low_latency on so that our tty_push actually forces * | |
455 | * the data through,otherwise it is scheduled, and with * | |
456 | * high data rates (like with OHCI) data can get lost. */ | |
457 | ||
458 | if (port->tty) | |
459 | port->tty->low_latency = 1; | |
460 | ||
461 | /* see if we've set up our endpoint info yet * | |
462 | * (can't set it up in mos7720_startup as the * | |
463 | * structures were not set up at that time.) */ | |
464 | if (!mos7720_serial->interrupt_started) { | |
465 | dbg("Interrupt buffer NULL !!!"); | |
466 | ||
467 | /* not set up yet, so do it now */ | |
468 | mos7720_serial->interrupt_started = 1; | |
469 | ||
470 | dbg("To Submit URB !!!"); | |
471 | ||
472 | /* set up our interrupt urb */ | |
473 | usb_fill_int_urb(port0->interrupt_in_urb, serial->dev, | |
474 | usb_rcvintpipe(serial->dev, | |
475 | port->interrupt_in_endpointAddress), | |
476 | port0->interrupt_in_buffer, | |
477 | port0->interrupt_in_urb->transfer_buffer_length, | |
478 | mos7720_interrupt_callback, mos7720_port, | |
479 | port0->interrupt_in_urb->interval); | |
480 | ||
481 | /* start interrupt read for this mos7720 this interrupt * | |
482 | * will continue as long as the mos7720 is connected */ | |
483 | dbg("Submit URB over !!!"); | |
484 | response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL); | |
485 | if (response) | |
486 | dev_err(&port->dev, | |
487 | "%s - Error %d submitting control urb", | |
488 | __FUNCTION__, response); | |
489 | } | |
490 | ||
491 | /* set up our bulk in urb */ | |
492 | usb_fill_bulk_urb(port->read_urb, serial->dev, | |
493 | usb_rcvbulkpipe(serial->dev, | |
494 | port->bulk_in_endpointAddress), | |
495 | port->bulk_in_buffer, | |
496 | port->read_urb->transfer_buffer_length, | |
497 | mos7720_bulk_in_callback, mos7720_port); | |
498 | response = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
499 | if (response) | |
500 | dev_err(&port->dev, | |
501 | "%s - Error %d submitting read urb", __FUNCTION__, response); | |
502 | ||
503 | /* initialize our icount structure */ | |
504 | memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount)); | |
505 | ||
506 | /* initialize our port settings */ | |
507 | mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */ | |
508 | ||
509 | /* send a open port command */ | |
510 | mos7720_port->open = 1; | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | /* | |
516 | * mos7720_chars_in_buffer | |
517 | * this function is called by the tty driver when it wants to know how many | |
518 | * bytes of data we currently have outstanding in the port (data that has | |
519 | * been written, but hasn't made it out the port yet) | |
520 | * If successful, we return the number of bytes left to be written in the | |
521 | * system, | |
522 | * Otherwise we return a negative error number. | |
523 | */ | |
524 | static int mos7720_chars_in_buffer(struct usb_serial_port *port) | |
525 | { | |
526 | int i; | |
527 | int chars = 0; | |
528 | struct moschip_port *mos7720_port; | |
529 | ||
530 | dbg("%s:entering ...........", __FUNCTION__); | |
531 | ||
532 | mos7720_port = usb_get_serial_port_data(port); | |
533 | if (mos7720_port == NULL) { | |
534 | dbg("%s:leaving ...........", __FUNCTION__); | |
535 | return -ENODEV; | |
536 | } | |
537 | ||
538 | for (i = 0; i < NUM_URBS; ++i) { | |
539 | if (mos7720_port->write_urb_pool[i]->status == -EINPROGRESS) | |
540 | chars += URB_TRANSFER_BUFFER_SIZE; | |
541 | } | |
542 | dbg("%s - returns %d", __FUNCTION__, chars); | |
543 | return chars; | |
544 | } | |
545 | ||
546 | static void mos7720_close(struct usb_serial_port *port, struct file *filp) | |
547 | { | |
548 | struct usb_serial *serial; | |
549 | struct moschip_port *mos7720_port; | |
550 | char data; | |
551 | int j; | |
552 | ||
553 | dbg("mos7720_close:entering..."); | |
554 | ||
555 | serial = port->serial; | |
556 | ||
557 | mos7720_port = usb_get_serial_port_data(port); | |
558 | if (mos7720_port == NULL) | |
559 | return; | |
560 | ||
561 | for (j = 0; j < NUM_URBS; ++j) | |
562 | usb_kill_urb(mos7720_port->write_urb_pool[j]); | |
563 | ||
564 | /* Freeing Write URBs */ | |
565 | for (j = 0; j < NUM_URBS; ++j) { | |
566 | if (mos7720_port->write_urb_pool[j]) { | |
567 | kfree(mos7720_port->write_urb_pool[j]->transfer_buffer); | |
568 | usb_free_urb(mos7720_port->write_urb_pool[j]); | |
569 | } | |
570 | } | |
571 | ||
572 | /* While closing port, shutdown all bulk read, write * | |
573 | * and interrupt read if they exists */ | |
574 | if (serial->dev) { | |
575 | dbg("Shutdown bulk write"); | |
576 | usb_kill_urb(port->write_urb); | |
577 | dbg("Shutdown bulk read"); | |
578 | usb_kill_urb(port->read_urb); | |
579 | } | |
580 | ||
581 | data = 0x00; | |
582 | send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, | |
583 | 0x04, &data); | |
584 | ||
585 | data = 0x00; | |
586 | send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, | |
587 | 0x01, &data); | |
588 | ||
589 | mos7720_port->open = 0; | |
590 | ||
591 | dbg("Leaving %s", __FUNCTION__); | |
592 | } | |
593 | ||
594 | static void mos7720_break(struct usb_serial_port *port, int break_state) | |
595 | { | |
596 | unsigned char data; | |
597 | struct usb_serial *serial; | |
598 | struct moschip_port *mos7720_port; | |
599 | ||
600 | dbg("Entering %s", __FUNCTION__); | |
601 | ||
602 | serial = port->serial; | |
603 | ||
604 | mos7720_port = usb_get_serial_port_data(port); | |
605 | if (mos7720_port == NULL) | |
606 | return; | |
607 | ||
608 | if (break_state == -1) | |
609 | data = mos7720_port->shadowLCR | UART_LCR_SBC; | |
610 | else | |
611 | data = mos7720_port->shadowLCR & ~UART_LCR_SBC; | |
612 | ||
613 | mos7720_port->shadowLCR = data; | |
614 | send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, | |
615 | 0x03, &data); | |
616 | ||
617 | return; | |
618 | } | |
619 | ||
620 | /* | |
621 | * mos7720_write_room | |
622 | * this function is called by the tty driver when it wants to know how many | |
623 | * bytes of data we can accept for a specific port. | |
624 | * If successful, we return the amount of room that we have for this port | |
625 | * Otherwise we return a negative error number. | |
626 | */ | |
627 | static int mos7720_write_room(struct usb_serial_port *port) | |
628 | { | |
629 | struct moschip_port *mos7720_port; | |
630 | int room = 0; | |
631 | int i; | |
632 | ||
633 | dbg("%s:entering ...........", __FUNCTION__); | |
634 | ||
635 | mos7720_port = usb_get_serial_port_data(port); | |
636 | if (mos7720_port == NULL) { | |
637 | dbg("%s:leaving ...........", __FUNCTION__); | |
638 | return -ENODEV; | |
639 | } | |
640 | ||
641 | for (i = 0; i < NUM_URBS; ++i) { | |
642 | if (mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) | |
643 | room += URB_TRANSFER_BUFFER_SIZE; | |
644 | } | |
645 | ||
646 | dbg("%s - returns %d", __FUNCTION__, room); | |
647 | return room; | |
648 | } | |
649 | ||
650 | static int mos7720_write(struct usb_serial_port *port, | |
651 | const unsigned char *data, int count) | |
652 | { | |
653 | int status; | |
654 | int i; | |
655 | int bytes_sent = 0; | |
656 | int transfer_size; | |
657 | ||
658 | struct moschip_port *mos7720_port; | |
659 | struct usb_serial *serial; | |
660 | struct urb *urb; | |
661 | const unsigned char *current_position = data; | |
662 | ||
663 | dbg("%s:entering ...........", __FUNCTION__); | |
664 | ||
665 | serial = port->serial; | |
666 | ||
667 | mos7720_port = usb_get_serial_port_data(port); | |
668 | if (mos7720_port == NULL) { | |
669 | dbg("mos7720_port is NULL"); | |
670 | return -ENODEV; | |
671 | } | |
672 | ||
673 | /* try to find a free urb in the list */ | |
674 | urb = NULL; | |
675 | ||
676 | for (i = 0; i < NUM_URBS; ++i) { | |
677 | if (mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) { | |
678 | urb = mos7720_port->write_urb_pool[i]; | |
679 | dbg("URB:%d",i); | |
680 | break; | |
681 | } | |
682 | } | |
683 | ||
684 | if (urb == NULL) { | |
685 | dbg("%s - no more free urbs", __FUNCTION__); | |
686 | goto exit; | |
687 | } | |
688 | ||
689 | if (urb->transfer_buffer == NULL) { | |
690 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
691 | GFP_KERNEL); | |
692 | if (urb->transfer_buffer == NULL) { | |
693 | err("%s no more kernel memory...", __FUNCTION__); | |
694 | goto exit; | |
695 | } | |
696 | } | |
697 | transfer_size = min (count, URB_TRANSFER_BUFFER_SIZE); | |
698 | ||
699 | memcpy(urb->transfer_buffer, current_position, transfer_size); | |
700 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, | |
701 | urb->transfer_buffer); | |
702 | ||
703 | /* fill urb with data and submit */ | |
704 | usb_fill_bulk_urb(urb, serial->dev, | |
705 | usb_sndbulkpipe(serial->dev, | |
706 | port->bulk_out_endpointAddress), | |
707 | urb->transfer_buffer, transfer_size, | |
708 | mos7720_bulk_out_data_callback, mos7720_port); | |
709 | ||
710 | /* send it down the pipe */ | |
711 | status = usb_submit_urb(urb,GFP_ATOMIC); | |
712 | if (status) { | |
713 | err("%s - usb_submit_urb(write bulk) failed with status = %d", | |
714 | __FUNCTION__, status); | |
715 | bytes_sent = status; | |
716 | goto exit; | |
717 | } | |
718 | bytes_sent = transfer_size; | |
719 | ||
720 | exit: | |
721 | return bytes_sent; | |
722 | } | |
723 | ||
724 | static void mos7720_throttle(struct usb_serial_port *port) | |
725 | { | |
726 | struct moschip_port *mos7720_port; | |
727 | struct tty_struct *tty; | |
728 | int status; | |
729 | ||
730 | dbg("%s- port %d\n", __FUNCTION__, port->number); | |
731 | ||
732 | mos7720_port = usb_get_serial_port_data(port); | |
733 | ||
734 | if (mos7720_port == NULL) | |
735 | return; | |
736 | ||
737 | if (!mos7720_port->open) { | |
738 | dbg("port not opened"); | |
739 | return; | |
740 | } | |
741 | ||
742 | dbg("%s: Entering ..........", __FUNCTION__); | |
743 | ||
744 | tty = port->tty; | |
745 | if (!tty) { | |
746 | dbg("%s - no tty available", __FUNCTION__); | |
747 | return; | |
748 | } | |
749 | ||
750 | /* if we are implementing XON/XOFF, send the stop character */ | |
751 | if (I_IXOFF(tty)) { | |
752 | unsigned char stop_char = STOP_CHAR(tty); | |
753 | status = mos7720_write(port, &stop_char, 1); | |
754 | if (status <= 0) | |
755 | return; | |
756 | } | |
757 | ||
758 | /* if we are implementing RTS/CTS, toggle that line */ | |
759 | if (tty->termios->c_cflag & CRTSCTS) { | |
760 | mos7720_port->shadowMCR &= ~UART_MCR_RTS; | |
761 | status = send_mos_cmd(port->serial, MOS_WRITE, | |
762 | port->number - port->serial->minor, | |
763 | UART_MCR, &mos7720_port->shadowMCR); | |
764 | if (status != 0) | |
765 | return; | |
766 | } | |
767 | } | |
768 | ||
769 | static void mos7720_unthrottle(struct usb_serial_port *port) | |
770 | { | |
771 | struct tty_struct *tty; | |
772 | int status; | |
773 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
774 | ||
775 | if (mos7720_port == NULL) | |
776 | return; | |
777 | ||
778 | if (!mos7720_port->open) { | |
779 | dbg("%s - port not opened", __FUNCTION__); | |
780 | return; | |
781 | } | |
782 | ||
783 | dbg("%s: Entering ..........", __FUNCTION__); | |
784 | ||
785 | tty = port->tty; | |
786 | if (!tty) { | |
787 | dbg("%s - no tty available", __FUNCTION__); | |
788 | return; | |
789 | } | |
790 | ||
791 | /* if we are implementing XON/XOFF, send the start character */ | |
792 | if (I_IXOFF(tty)) { | |
793 | unsigned char start_char = START_CHAR(tty); | |
794 | status = mos7720_write(port, &start_char, 1); | |
795 | if (status <= 0) | |
796 | return; | |
797 | } | |
798 | ||
799 | /* if we are implementing RTS/CTS, toggle that line */ | |
800 | if (tty->termios->c_cflag & CRTSCTS) { | |
801 | mos7720_port->shadowMCR |= UART_MCR_RTS; | |
802 | status = send_mos_cmd(port->serial, MOS_WRITE, | |
803 | port->number - port->serial->minor, | |
804 | UART_MCR, &mos7720_port->shadowMCR); | |
805 | if (status != 0) | |
806 | return; | |
807 | } | |
808 | } | |
809 | ||
810 | static int set_higher_rates(struct moschip_port *mos7720_port, | |
811 | unsigned int baud) | |
812 | { | |
813 | unsigned char data; | |
814 | struct usb_serial_port *port; | |
815 | struct usb_serial *serial; | |
816 | int port_number; | |
817 | ||
818 | if (mos7720_port == NULL) | |
819 | return -EINVAL; | |
820 | ||
821 | port = mos7720_port->port; | |
822 | serial = port->serial; | |
823 | ||
824 | /*********************************************** | |
825 | * Init Sequence for higher rates | |
826 | ***********************************************/ | |
827 | dbg("Sending Setting Commands .........."); | |
828 | port_number = port->number - port->serial->minor; | |
829 | ||
830 | data = 0x000; | |
831 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
832 | data = 0x000; | |
833 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data); | |
834 | data = 0x0CF; | |
835 | send_mos_cmd(serial, MOS_WRITE, port->number, 0x02, &data); | |
836 | data = 0x00b; | |
837 | mos7720_port->shadowMCR = data; | |
838 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
839 | data = 0x00b; | |
840 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
841 | ||
842 | data = 0x000; | |
843 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); | |
844 | data = 0x000; | |
845 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); | |
846 | ||
847 | ||
848 | /*********************************************** | |
849 | * Set for higher rates * | |
850 | ***********************************************/ | |
851 | ||
852 | data = baud * 0x10; | |
853 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1,&data); | |
854 | ||
855 | data = 0x003; | |
856 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); | |
857 | data = 0x003; | |
858 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); | |
859 | ||
860 | data = 0x02b; | |
861 | mos7720_port->shadowMCR = data; | |
862 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
863 | data = 0x02b; | |
864 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
865 | ||
866 | /*********************************************** | |
867 | * Set DLL/DLM | |
868 | ***********************************************/ | |
869 | ||
870 | data = mos7720_port->shadowLCR | UART_LCR_DLAB; | |
871 | mos7720_port->shadowLCR = data; | |
872 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
873 | ||
874 | data = 0x001; /* DLL */ | |
875 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data); | |
876 | data = 0x000; /* DLM */ | |
877 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
878 | ||
879 | data = mos7720_port->shadowLCR & ~UART_LCR_DLAB; | |
880 | mos7720_port->shadowLCR = data; | |
881 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
882 | ||
883 | return 0; | |
884 | } | |
885 | ||
886 | /* baud rate information */ | |
887 | struct divisor_table_entry | |
888 | { | |
889 | __u32 baudrate; | |
890 | __u16 divisor; | |
891 | }; | |
892 | ||
893 | /* Define table of divisors for moschip 7720 hardware * | |
894 | * These assume a 3.6864MHz crystal, the standard /16, and * | |
895 | * MCR.7 = 0. */ | |
896 | static struct divisor_table_entry divisor_table[] = { | |
897 | { 50, 2304}, | |
898 | { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ | |
899 | { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ | |
900 | { 150, 768}, | |
901 | { 300, 384}, | |
902 | { 600, 192}, | |
903 | { 1200, 96}, | |
904 | { 1800, 64}, | |
905 | { 2400, 48}, | |
906 | { 4800, 24}, | |
907 | { 7200, 16}, | |
908 | { 9600, 12}, | |
909 | { 19200, 6}, | |
910 | { 38400, 3}, | |
911 | { 57600, 2}, | |
912 | { 115200, 1}, | |
913 | }; | |
914 | ||
915 | /***************************************************************************** | |
916 | * calc_baud_rate_divisor | |
917 | * this function calculates the proper baud rate divisor for the specified | |
918 | * baud rate. | |
919 | *****************************************************************************/ | |
920 | static int calc_baud_rate_divisor(int baudrate, int *divisor) | |
921 | { | |
922 | int i; | |
923 | __u16 custom; | |
924 | __u16 round1; | |
925 | __u16 round; | |
926 | ||
927 | ||
928 | dbg("%s - %d", __FUNCTION__, baudrate); | |
929 | ||
930 | for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { | |
931 | if (divisor_table[i].baudrate == baudrate) { | |
932 | *divisor = divisor_table[i].divisor; | |
933 | return 0; | |
934 | } | |
935 | } | |
936 | ||
937 | /* After trying for all the standard baud rates * | |
938 | * Try calculating the divisor for this baud rate */ | |
939 | if (baudrate > 75 && baudrate < 230400) { | |
940 | /* get the divisor */ | |
941 | custom = (__u16)(230400L / baudrate); | |
942 | ||
943 | /* Check for round off */ | |
944 | round1 = (__u16)(2304000L / baudrate); | |
945 | round = (__u16)(round1 - (custom * 10)); | |
946 | if (round > 4) | |
947 | custom++; | |
948 | *divisor = custom; | |
949 | ||
950 | dbg("Baud %d = %d",baudrate, custom); | |
951 | return 0; | |
952 | } | |
953 | ||
954 | dbg("Baud calculation Failed..."); | |
955 | return -EINVAL; | |
956 | } | |
957 | ||
958 | /* | |
959 | * send_cmd_write_baud_rate | |
960 | * this function sends the proper command to change the baud rate of the | |
961 | * specified port. | |
962 | */ | |
963 | static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port, | |
964 | int baudrate) | |
965 | { | |
966 | struct usb_serial_port *port; | |
967 | struct usb_serial *serial; | |
968 | int divisor; | |
969 | int status; | |
970 | unsigned char data; | |
971 | unsigned char number; | |
972 | ||
973 | if (mos7720_port == NULL) | |
974 | return -1; | |
975 | ||
976 | port = mos7720_port->port; | |
977 | serial = port->serial; | |
978 | ||
979 | dbg("%s: Entering ..........", __FUNCTION__); | |
980 | ||
981 | number = port->number - port->serial->minor; | |
982 | dbg("%s - port = %d, baud = %d", __FUNCTION__, port->number, baudrate); | |
983 | ||
984 | /* Calculate the Divisor */ | |
985 | status = calc_baud_rate_divisor(baudrate, &divisor); | |
986 | if (status) { | |
987 | err("%s - bad baud rate", __FUNCTION__); | |
988 | return status; | |
989 | } | |
990 | ||
991 | /* Enable access to divisor latch */ | |
992 | data = mos7720_port->shadowLCR | UART_LCR_DLAB; | |
993 | mos7720_port->shadowLCR = data; | |
994 | send_mos_cmd(serial, MOS_WRITE, number, UART_LCR, &data); | |
995 | ||
996 | /* Write the divisor */ | |
997 | data = ((unsigned char)(divisor & 0xff)); | |
998 | send_mos_cmd(serial, MOS_WRITE, number, 0x00, &data); | |
999 | ||
1000 | data = ((unsigned char)((divisor & 0xff00) >> 8)); | |
1001 | send_mos_cmd(serial, MOS_WRITE, number, 0x01, &data); | |
1002 | ||
1003 | /* Disable access to divisor latch */ | |
1004 | data = mos7720_port->shadowLCR & ~UART_LCR_DLAB; | |
1005 | mos7720_port->shadowLCR = data; | |
1006 | send_mos_cmd(serial, MOS_WRITE, number, 0x03, &data); | |
1007 | ||
1008 | return status; | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * change_port_settings | |
1013 | * This routine is called to set the UART on the device to match | |
1014 | * the specified new settings. | |
1015 | */ | |
1016 | static void change_port_settings(struct moschip_port *mos7720_port, | |
1017 | struct termios *old_termios) | |
1018 | { | |
1019 | struct usb_serial_port *port; | |
1020 | struct usb_serial *serial; | |
1021 | struct tty_struct *tty; | |
1022 | int baud; | |
1023 | unsigned cflag; | |
1024 | unsigned iflag; | |
1025 | __u8 mask = 0xff; | |
1026 | __u8 lData; | |
1027 | __u8 lParity; | |
1028 | __u8 lStop; | |
1029 | int status; | |
1030 | int port_number; | |
1031 | char data; | |
1032 | ||
1033 | if (mos7720_port == NULL) | |
1034 | return ; | |
1035 | ||
1036 | port = mos7720_port->port; | |
1037 | serial = port->serial; | |
1038 | port_number = port->number - port->serial->minor; | |
1039 | ||
1040 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1041 | ||
1042 | if (!mos7720_port->open) { | |
1043 | dbg("%s - port not opened", __FUNCTION__); | |
1044 | return; | |
1045 | } | |
1046 | ||
1047 | tty = mos7720_port->port->tty; | |
1048 | ||
1049 | if ((!tty) || (!tty->termios)) { | |
1050 | dbg("%s - no tty structures", __FUNCTION__); | |
1051 | return; | |
1052 | } | |
1053 | ||
1054 | dbg("%s: Entering ..........", __FUNCTION__); | |
1055 | ||
1056 | lData = UART_LCR_WLEN8; | |
1057 | lStop = 0x00; /* 1 stop bit */ | |
1058 | lParity = 0x00; /* No parity */ | |
1059 | ||
1060 | cflag = tty->termios->c_cflag; | |
1061 | iflag = tty->termios->c_iflag; | |
1062 | ||
1063 | /* Change the number of bits */ | |
1064 | switch (cflag & CSIZE) { | |
1065 | case CS5: | |
1066 | lData = UART_LCR_WLEN5; | |
1067 | mask = 0x1f; | |
1068 | break; | |
1069 | ||
1070 | case CS6: | |
1071 | lData = UART_LCR_WLEN6; | |
1072 | mask = 0x3f; | |
1073 | break; | |
1074 | ||
1075 | case CS7: | |
1076 | lData = UART_LCR_WLEN7; | |
1077 | mask = 0x7f; | |
1078 | break; | |
1079 | default: | |
1080 | case CS8: | |
1081 | lData = UART_LCR_WLEN8; | |
1082 | break; | |
1083 | } | |
1084 | ||
1085 | /* Change the Parity bit */ | |
1086 | if (cflag & PARENB) { | |
1087 | if (cflag & PARODD) { | |
1088 | lParity = UART_LCR_PARITY; | |
1089 | dbg("%s - parity = odd", __FUNCTION__); | |
1090 | } else { | |
1091 | lParity = (UART_LCR_EPAR | UART_LCR_PARITY); | |
1092 | dbg("%s - parity = even", __FUNCTION__); | |
1093 | } | |
1094 | ||
1095 | } else { | |
1096 | dbg("%s - parity = none", __FUNCTION__); | |
1097 | } | |
1098 | ||
1099 | if (cflag & CMSPAR) | |
1100 | lParity = lParity | 0x20; | |
1101 | ||
1102 | /* Change the Stop bit */ | |
1103 | if (cflag & CSTOPB) { | |
1104 | lStop = UART_LCR_STOP; | |
1105 | dbg("%s - stop bits = 2", __FUNCTION__); | |
1106 | } else { | |
1107 | lStop = 0x00; | |
1108 | dbg("%s - stop bits = 1", __FUNCTION__); | |
1109 | } | |
1110 | ||
1111 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
1112 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
1113 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
1114 | ||
1115 | /* Update the LCR with the correct value */ | |
1116 | mos7720_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); | |
1117 | mos7720_port->shadowLCR |= (lData | lParity | lStop); | |
1118 | ||
1119 | ||
1120 | /* Disable Interrupts */ | |
1121 | data = 0x00; | |
1122 | send_mos_cmd(serial,MOS_WRITE,port->number - port->serial->minor, UART_IER, &data); | |
1123 | ||
1124 | data = 0x00; | |
1125 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data); | |
1126 | ||
1127 | data = 0xcf; | |
1128 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data); | |
1129 | ||
1130 | /* Send the updated LCR value to the mos7720 */ | |
1131 | data = mos7720_port->shadowLCR; | |
1132 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_LCR, &data); | |
1133 | ||
1134 | data = 0x00b; | |
1135 | mos7720_port->shadowMCR = data; | |
1136 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
1137 | data = 0x00b; | |
1138 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
1139 | ||
1140 | /* set up the MCR register and send it to the mos7720 */ | |
1141 | mos7720_port->shadowMCR = UART_MCR_OUT2; | |
1142 | if (cflag & CBAUD) | |
1143 | mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS); | |
1144 | ||
1145 | if (cflag & CRTSCTS) { | |
1146 | mos7720_port->shadowMCR |= (UART_MCR_XONANY); | |
1147 | ||
1148 | /* To set hardware flow control to the specified * | |
1149 | * serial port, in SP1/2_CONTROL_REG */ | |
1150 | if (port->number) { | |
1151 | data = 0x001; | |
1152 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, | |
1153 | 0x08, &data); | |
1154 | } else { | |
1155 | data = 0x002; | |
1156 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, | |
1157 | 0x08, &data); | |
1158 | } | |
1159 | } else { | |
1160 | mos7720_port->shadowMCR &= ~(UART_MCR_XONANY); | |
1161 | } | |
1162 | ||
1163 | data = mos7720_port->shadowMCR; | |
1164 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_MCR, &data); | |
1165 | ||
1166 | /* Determine divisor based on baud rate */ | |
1167 | baud = tty_get_baud_rate(tty); | |
1168 | if (!baud) { | |
1169 | /* pick a default, any default... */ | |
1170 | dbg("Picked default baud..."); | |
1171 | baud = 9600; | |
1172 | } | |
1173 | ||
1174 | if (baud >= 230400) { | |
1175 | set_higher_rates(mos7720_port, baud); | |
1176 | /* Enable Interrupts */ | |
1177 | data = 0x0c; | |
1178 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data); | |
1179 | return; | |
1180 | } | |
1181 | ||
1182 | dbg("%s - baud rate = %d", __FUNCTION__, baud); | |
1183 | status = send_cmd_write_baud_rate(mos7720_port, baud); | |
1184 | ||
1185 | /* Enable Interrupts */ | |
1186 | data = 0x0c; | |
1187 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data); | |
1188 | ||
1189 | if (port->read_urb->status != -EINPROGRESS) { | |
1190 | port->read_urb->dev = serial->dev; | |
1191 | ||
1192 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
1193 | if (status) | |
1194 | dbg("usb_submit_urb(read bulk) failed, status = %d", | |
1195 | status); | |
1196 | } | |
1197 | return; | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | * mos7720_set_termios | |
1202 | * this function is called by the tty driver when it wants to change the | |
1203 | * termios structure. | |
1204 | */ | |
1205 | static void mos7720_set_termios(struct usb_serial_port *port, | |
1206 | struct termios *old_termios) | |
1207 | { | |
1208 | int status; | |
1209 | unsigned int cflag; | |
1210 | struct usb_serial *serial; | |
1211 | struct moschip_port *mos7720_port; | |
1212 | struct tty_struct *tty; | |
1213 | ||
1214 | serial = port->serial; | |
1215 | ||
1216 | mos7720_port = usb_get_serial_port_data(port); | |
1217 | ||
1218 | if (mos7720_port == NULL) | |
1219 | return; | |
1220 | ||
1221 | tty = port->tty; | |
1222 | ||
1223 | if (!port->tty || !port->tty->termios) { | |
1224 | dbg("%s - no tty or termios", __FUNCTION__); | |
1225 | return; | |
1226 | } | |
1227 | ||
1228 | if (!mos7720_port->open) { | |
1229 | dbg("%s - port not opened", __FUNCTION__); | |
1230 | return; | |
1231 | } | |
1232 | ||
1233 | dbg("%s\n","setting termios - ASPIRE"); | |
1234 | ||
1235 | cflag = tty->termios->c_cflag; | |
1236 | ||
1237 | if (!cflag) { | |
1238 | printk("%s %s\n",__FUNCTION__,"cflag is NULL"); | |
1239 | return; | |
1240 | } | |
1241 | ||
1242 | /* check that they really want us to change something */ | |
1243 | if (old_termios) { | |
1244 | if ((cflag == old_termios->c_cflag) && | |
1245 | (RELEVANT_IFLAG(tty->termios->c_iflag) == | |
1246 | RELEVANT_IFLAG(old_termios->c_iflag))) { | |
1247 | dbg("Nothing to change"); | |
1248 | return; | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | dbg("%s - clfag %08x iflag %08x", __FUNCTION__, | |
1253 | tty->termios->c_cflag, | |
1254 | RELEVANT_IFLAG(tty->termios->c_iflag)); | |
1255 | ||
1256 | if (old_termios) | |
1257 | dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__, | |
1258 | old_termios->c_cflag, | |
1259 | RELEVANT_IFLAG(old_termios->c_iflag)); | |
1260 | ||
1261 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1262 | ||
1263 | /* change the port settings to the new ones specified */ | |
1264 | change_port_settings(mos7720_port, old_termios); | |
1265 | ||
1266 | if(!port->read_urb) { | |
1267 | dbg("%s","URB KILLED !!!!!\n"); | |
1268 | return; | |
1269 | } | |
1270 | ||
1271 | if(port->read_urb->status != -EINPROGRESS) { | |
1272 | port->read_urb->dev = serial->dev; | |
1273 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
1274 | if (status) | |
1275 | dbg("usb_submit_urb(read bulk) failed, status = %d", | |
1276 | status); | |
1277 | } | |
1278 | return; | |
1279 | } | |
1280 | ||
1281 | /* | |
1282 | * get_lsr_info - get line status register info | |
1283 | * | |
1284 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1285 | * is emptied. On bus types like RS485, the transmitter must | |
1286 | * release the bus after transmitting. This must be done when | |
1287 | * the transmit shift register is empty, not be done when the | |
1288 | * transmit holding register is empty. This functionality | |
1289 | * allows an RS485 driver to be written in user space. | |
1290 | */ | |
1291 | static int get_lsr_info(struct moschip_port *mos7720_port, | |
1292 | unsigned int __user *value) | |
1293 | { | |
1294 | int count; | |
1295 | unsigned int result = 0; | |
1296 | ||
1297 | count = mos7720_chars_in_buffer(mos7720_port->port); | |
1298 | if (count == 0) { | |
1299 | dbg("%s -- Empty", __FUNCTION__); | |
1300 | result = TIOCSER_TEMT; | |
1301 | } | |
1302 | ||
1303 | if (copy_to_user(value, &result, sizeof(int))) | |
1304 | return -EFAULT; | |
1305 | return 0; | |
1306 | } | |
1307 | ||
1308 | /* | |
1309 | * get_number_bytes_avail - get number of bytes available | |
1310 | * | |
1311 | * Purpose: Let user call ioctl to get the count of number of bytes available. | |
1312 | */ | |
1313 | static int get_number_bytes_avail(struct moschip_port *mos7720_port, | |
1314 | unsigned int __user *value) | |
1315 | { | |
1316 | unsigned int result = 0; | |
1317 | struct tty_struct *tty = mos7720_port->port->tty; | |
1318 | ||
1319 | if (!tty) | |
1320 | return -ENOIOCTLCMD; | |
1321 | ||
1322 | result = tty->read_cnt; | |
1323 | ||
1324 | dbg("%s(%d) = %d", __FUNCTION__, mos7720_port->port->number, result); | |
1325 | if (copy_to_user(value, &result, sizeof(int))) | |
1326 | return -EFAULT; | |
1327 | ||
1328 | return -ENOIOCTLCMD; | |
1329 | } | |
1330 | ||
1331 | static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd, | |
1332 | unsigned int __user *value) | |
1333 | { | |
1334 | unsigned int mcr ; | |
1335 | unsigned int arg; | |
1336 | unsigned char data; | |
1337 | ||
1338 | struct usb_serial_port *port; | |
1339 | ||
1340 | if (mos7720_port == NULL) | |
1341 | return -1; | |
1342 | ||
1343 | port = (struct usb_serial_port*)mos7720_port->port; | |
1344 | mcr = mos7720_port->shadowMCR; | |
1345 | ||
1346 | if (copy_from_user(&arg, value, sizeof(int))) | |
1347 | return -EFAULT; | |
1348 | ||
1349 | switch (cmd) { | |
1350 | case TIOCMBIS: | |
1351 | if (arg & TIOCM_RTS) | |
1352 | mcr |= UART_MCR_RTS; | |
1353 | if (arg & TIOCM_DTR) | |
1354 | mcr |= UART_MCR_RTS; | |
1355 | if (arg & TIOCM_LOOP) | |
1356 | mcr |= UART_MCR_LOOP; | |
1357 | break; | |
1358 | ||
1359 | case TIOCMBIC: | |
1360 | if (arg & TIOCM_RTS) | |
1361 | mcr &= ~UART_MCR_RTS; | |
1362 | if (arg & TIOCM_DTR) | |
1363 | mcr &= ~UART_MCR_RTS; | |
1364 | if (arg & TIOCM_LOOP) | |
1365 | mcr &= ~UART_MCR_LOOP; | |
1366 | break; | |
1367 | ||
1368 | case TIOCMSET: | |
1369 | /* turn off the RTS and DTR and LOOPBACK | |
1370 | * and then only turn on what was asked to */ | |
1371 | mcr &= ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP); | |
1372 | mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0); | |
1373 | mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0); | |
1374 | mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0); | |
1375 | break; | |
1376 | } | |
1377 | ||
1378 | mos7720_port->shadowMCR = mcr; | |
1379 | ||
1380 | data = mos7720_port->shadowMCR; | |
1381 | send_mos_cmd(port->serial, MOS_WRITE, | |
1382 | port->number - port->serial->minor, UART_MCR, &data); | |
1383 | ||
1384 | return 0; | |
1385 | } | |
1386 | ||
1387 | static int get_modem_info(struct moschip_port *mos7720_port, | |
1388 | unsigned int __user *value) | |
1389 | { | |
1390 | unsigned int result = 0; | |
1391 | unsigned int msr = mos7720_port->shadowMSR; | |
1392 | unsigned int mcr = mos7720_port->shadowMCR; | |
1393 | ||
1394 | result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ | |
1395 | | ((mcr & UART_MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ | |
1396 | | ((msr & UART_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ | |
1397 | | ((msr & UART_MSR_DCD) ? TIOCM_CAR: 0) /* 0x040 */ | |
1398 | | ((msr & UART_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ | |
1399 | | ((msr & UART_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ | |
1400 | ||
1401 | ||
1402 | dbg("%s -- %x", __FUNCTION__, result); | |
1403 | ||
1404 | if (copy_to_user(value, &result, sizeof(int))) | |
1405 | return -EFAULT; | |
1406 | return 0; | |
1407 | } | |
1408 | ||
1409 | static int get_serial_info(struct moschip_port *mos7720_port, | |
1410 | struct serial_struct __user *retinfo) | |
1411 | { | |
1412 | struct serial_struct tmp; | |
1413 | ||
1414 | if (!retinfo) | |
1415 | return -EFAULT; | |
1416 | ||
1417 | memset(&tmp, 0, sizeof(tmp)); | |
1418 | ||
1419 | tmp.type = PORT_16550A; | |
1420 | tmp.line = mos7720_port->port->serial->minor; | |
1421 | tmp.port = mos7720_port->port->number; | |
1422 | tmp.irq = 0; | |
1423 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
1424 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; | |
1425 | tmp.baud_base = 9600; | |
1426 | tmp.close_delay = 5*HZ; | |
1427 | tmp.closing_wait = 30*HZ; | |
1428 | ||
1429 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1430 | return -EFAULT; | |
1431 | return 0; | |
1432 | } | |
1433 | ||
1434 | static int mos7720_ioctl(struct usb_serial_port *port, struct file *file, | |
1435 | unsigned int cmd, unsigned long arg) | |
1436 | { | |
1437 | struct moschip_port *mos7720_port; | |
1438 | struct async_icount cnow; | |
1439 | struct async_icount cprev; | |
1440 | struct serial_icounter_struct icount; | |
1441 | ||
1442 | mos7720_port = usb_get_serial_port_data(port); | |
1443 | if (mos7720_port == NULL) | |
1444 | return -ENODEV; | |
1445 | ||
1446 | dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd); | |
1447 | ||
1448 | switch (cmd) { | |
1449 | case TIOCINQ: | |
1450 | /* return number of bytes available */ | |
1451 | dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number); | |
1452 | return get_number_bytes_avail(mos7720_port, | |
1453 | (unsigned int __user *)arg); | |
1454 | break; | |
1455 | ||
1456 | case TIOCSERGETLSR: | |
1457 | dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number); | |
1458 | return get_lsr_info(mos7720_port, (unsigned int __user *)arg); | |
1459 | return 0; | |
1460 | ||
1461 | case TIOCMBIS: | |
1462 | case TIOCMBIC: | |
1463 | case TIOCMSET: | |
1464 | dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__, | |
1465 | port->number); | |
1466 | return set_modem_info(mos7720_port, cmd, | |
1467 | (unsigned int __user *)arg); | |
1468 | ||
1469 | case TIOCMGET: | |
1470 | dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number); | |
1471 | return get_modem_info(mos7720_port, | |
1472 | (unsigned int __user *)arg); | |
1473 | ||
1474 | case TIOCGSERIAL: | |
1475 | dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number); | |
1476 | return get_serial_info(mos7720_port, | |
1477 | (struct serial_struct __user *)arg); | |
1478 | ||
1479 | case TIOCSSERIAL: | |
1480 | dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number); | |
1481 | break; | |
1482 | ||
1483 | case TIOCMIWAIT: | |
1484 | dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); | |
1485 | cprev = mos7720_port->icount; | |
1486 | while (1) { | |
1487 | if (signal_pending(current)) | |
1488 | return -ERESTARTSYS; | |
1489 | cnow = mos7720_port->icount; | |
1490 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
1491 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
1492 | return -EIO; /* no change => error */ | |
1493 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
1494 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
1495 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
1496 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { | |
1497 | return 0; | |
1498 | } | |
1499 | cprev = cnow; | |
1500 | } | |
1501 | /* NOTREACHED */ | |
1502 | break; | |
1503 | ||
1504 | case TIOCGICOUNT: | |
1505 | cnow = mos7720_port->icount; | |
1506 | icount.cts = cnow.cts; | |
1507 | icount.dsr = cnow.dsr; | |
1508 | icount.rng = cnow.rng; | |
1509 | icount.dcd = cnow.dcd; | |
1510 | icount.rx = cnow.rx; | |
1511 | icount.tx = cnow.tx; | |
1512 | icount.frame = cnow.frame; | |
1513 | icount.overrun = cnow.overrun; | |
1514 | icount.parity = cnow.parity; | |
1515 | icount.brk = cnow.brk; | |
1516 | icount.buf_overrun = cnow.buf_overrun; | |
1517 | ||
1518 | dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, | |
1519 | port->number, icount.rx, icount.tx ); | |
1520 | if (copy_to_user((void __user *)arg, &icount, sizeof(icount))) | |
1521 | return -EFAULT; | |
1522 | return 0; | |
1523 | } | |
1524 | ||
1525 | return -ENOIOCTLCMD; | |
1526 | } | |
1527 | ||
1528 | static int mos7720_startup(struct usb_serial *serial) | |
1529 | { | |
1530 | struct moschip_serial *mos7720_serial; | |
1531 | struct moschip_port *mos7720_port; | |
1532 | struct usb_device *dev; | |
1533 | int i; | |
1534 | char data; | |
1535 | ||
1536 | dbg("%s: Entering ..........", __FUNCTION__); | |
1537 | ||
1538 | if (!serial) { | |
1539 | dbg("Invalid Handler"); | |
1540 | return -ENODEV; | |
1541 | } | |
1542 | ||
1543 | dev = serial->dev; | |
1544 | ||
1545 | /* create our private serial structure */ | |
1546 | mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL); | |
1547 | if (mos7720_serial == NULL) { | |
1548 | err("%s - Out of memory", __FUNCTION__); | |
1549 | return -ENOMEM; | |
1550 | } | |
1551 | ||
1552 | usb_set_serial_data(serial, mos7720_serial); | |
1553 | ||
1554 | /* we set up the pointers to the endpoints in the mos7720_open * | |
1555 | * function, as the structures aren't created yet. */ | |
1556 | ||
1557 | /* set up port private structures */ | |
1558 | for (i = 0; i < serial->num_ports; ++i) { | |
1559 | mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); | |
1560 | if (mos7720_port == NULL) { | |
1561 | err("%s - Out of memory", __FUNCTION__); | |
1562 | usb_set_serial_data(serial, NULL); | |
1563 | kfree(mos7720_serial); | |
1564 | return -ENOMEM; | |
1565 | } | |
1566 | ||
1567 | /* Initialize all port interrupt end point to port 0 int | |
1568 | * endpoint. Our device has only one interrupt endpoint | |
1569 | * comman to all ports */ | |
1570 | serial->port[i]->interrupt_in_endpointAddress = serial->port[0]->interrupt_in_endpointAddress; | |
1571 | ||
1572 | mos7720_port->port = serial->port[i]; | |
1573 | usb_set_serial_port_data(serial->port[i], mos7720_port); | |
1574 | ||
1575 | dbg("port number is %d", serial->port[i]->number); | |
1576 | dbg("serial number is %d", serial->minor); | |
1577 | } | |
1578 | ||
1579 | ||
1580 | /* setting configuration feature to one */ | |
1581 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
1582 | (__u8)0x03, 0x00,0x01,0x00, NULL, 0x00, 5*HZ); | |
1583 | ||
1584 | send_mos_cmd(serial,MOS_READ,0x00, UART_LSR, &data); // LSR For Port 1 | |
1585 | dbg("LSR:%x",data); | |
1586 | ||
1587 | send_mos_cmd(serial,MOS_READ,0x01, UART_LSR, &data); // LSR For Port 2 | |
1588 | dbg("LSR:%x",data); | |
1589 | ||
1590 | return 0; | |
1591 | } | |
1592 | ||
1593 | static void mos7720_shutdown(struct usb_serial *serial) | |
1594 | { | |
1595 | int i; | |
1596 | ||
1597 | /* free private structure allocated for serial port */ | |
1598 | for (i=0; i < serial->num_ports; ++i) { | |
1599 | kfree(usb_get_serial_port_data(serial->port[i])); | |
1600 | usb_set_serial_port_data(serial->port[i], NULL); | |
1601 | } | |
1602 | ||
1603 | /* free private structure allocated for serial device */ | |
1604 | kfree(usb_get_serial_data(serial)); | |
1605 | usb_set_serial_data(serial, NULL); | |
1606 | } | |
1607 | ||
1608 | static struct usb_serial_driver moschip7720_2port_driver = { | |
1609 | .driver = { | |
1610 | .owner = THIS_MODULE, | |
1611 | .name = "moschip7720", | |
1612 | }, | |
1613 | .description = "Moschip 2 port adapter", | |
1614 | .id_table = moschip_port_id_table, | |
1615 | .num_interrupt_in = 1, | |
1616 | .num_bulk_in = 2, | |
1617 | .num_bulk_out = 2, | |
1618 | .num_ports = 2, | |
1619 | .open = mos7720_open, | |
1620 | .close = mos7720_close, | |
1621 | .throttle = mos7720_throttle, | |
1622 | .unthrottle = mos7720_unthrottle, | |
1623 | .attach = mos7720_startup, | |
1624 | .shutdown = mos7720_shutdown, | |
1625 | .ioctl = mos7720_ioctl, | |
1626 | .set_termios = mos7720_set_termios, | |
1627 | .write = mos7720_write, | |
1628 | .write_room = mos7720_write_room, | |
1629 | .chars_in_buffer = mos7720_chars_in_buffer, | |
1630 | .break_ctl = mos7720_break, | |
1631 | .read_bulk_callback = mos7720_bulk_in_callback, | |
1632 | }; | |
1633 | ||
1634 | static struct usb_driver usb_driver = { | |
1635 | .name = "moschip7720", | |
1636 | .probe = usb_serial_probe, | |
1637 | .disconnect = usb_serial_disconnect, | |
1638 | .id_table = moschip_port_id_table, | |
1639 | }; | |
1640 | ||
1641 | static int __init moschip7720_init(void) | |
1642 | { | |
1643 | int retval; | |
1644 | ||
1645 | dbg("%s: Entering ..........", __FUNCTION__); | |
1646 | ||
1647 | /* Register with the usb serial */ | |
1648 | retval = usb_serial_register(&moschip7720_2port_driver); | |
1649 | if (retval) | |
1650 | goto failed_port_device_register; | |
1651 | ||
1652 | info(DRIVER_DESC " " DRIVER_VERSION); | |
1653 | ||
1654 | /* Register with the usb */ | |
1655 | retval = usb_register(&usb_driver); | |
1656 | if (retval) | |
1657 | goto failed_usb_register; | |
1658 | ||
1659 | return 0; | |
1660 | ||
1661 | failed_usb_register: | |
1662 | usb_serial_deregister(&moschip7720_2port_driver); | |
1663 | ||
1664 | failed_port_device_register: | |
1665 | return retval; | |
1666 | } | |
1667 | ||
1668 | static void __exit moschip7720_exit(void) | |
1669 | { | |
1670 | usb_deregister(&usb_driver); | |
1671 | usb_serial_deregister(&moschip7720_2port_driver); | |
1672 | } | |
1673 | ||
1674 | module_init(moschip7720_init); | |
1675 | module_exit(moschip7720_exit); | |
1676 | ||
1677 | /* Module information */ | |
1678 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1679 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1680 | MODULE_LICENSE("GPL"); | |
1681 | ||
1682 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1683 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |