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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; | |
325b70c2 | 106 | __u8 *data; |
0f64478c GKH |
107 | __u8 sp1; |
108 | __u8 sp2; | |
0f64478c GKH |
109 | |
110 | dbg("%s"," : Entering\n"); | |
111 | ||
112 | if (!urb) { | |
113 | dbg("%s","Invalid Pointer !!!!:\n"); | |
114 | return; | |
115 | } | |
116 | ||
117 | switch (urb->status) { | |
118 | case 0: | |
119 | /* success */ | |
120 | break; | |
121 | case -ECONNRESET: | |
122 | case -ENOENT: | |
123 | case -ESHUTDOWN: | |
124 | /* this urb is terminated, clean up */ | |
125 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, | |
126 | urb->status); | |
127 | return; | |
128 | default: | |
129 | dbg("%s - nonzero urb status received: %d", __FUNCTION__, | |
130 | urb->status); | |
131 | goto exit; | |
132 | } | |
133 | ||
134 | length = urb->actual_length; | |
135 | data = urb->transfer_buffer; | |
136 | ||
137 | /* Moschip get 4 bytes | |
138 | * Byte 1 IIR Port 1 (port.number is 0) | |
139 | * Byte 2 IIR Port 2 (port.number is 1) | |
140 | * Byte 3 -------------- | |
141 | * Byte 4 FIFO status for both */ | |
325b70c2 ON |
142 | |
143 | /* the above description is inverted | |
144 | * oneukum 2007-03-14 */ | |
145 | ||
146 | if (unlikely(length != 4)) { | |
0f64478c GKH |
147 | dbg("Wrong data !!!"); |
148 | return; | |
149 | } | |
150 | ||
325b70c2 ON |
151 | sp1 = data[3]; |
152 | sp2 = data[2]; | |
0f64478c | 153 | |
325b70c2 | 154 | if ((sp1 | sp2) & 0x01) { |
0f64478c GKH |
155 | /* No Interrupt Pending in both the ports */ |
156 | dbg("No Interrupt !!!"); | |
157 | } else { | |
158 | switch (sp1 & 0x0f) { | |
159 | case SERIAL_IIR_RLS: | |
160 | dbg("Serial Port 1: Receiver status error or address " | |
161 | "bit detected in 9-bit mode\n"); | |
162 | break; | |
163 | case SERIAL_IIR_CTI: | |
164 | dbg("Serial Port 1: Receiver time out"); | |
165 | break; | |
166 | case SERIAL_IIR_MS: | |
167 | dbg("Serial Port 1: Modem status change"); | |
168 | break; | |
169 | } | |
170 | ||
171 | switch (sp2 & 0x0f) { | |
172 | case SERIAL_IIR_RLS: | |
173 | dbg("Serial Port 2: Receiver status error or address " | |
174 | "bit detected in 9-bit mode"); | |
175 | break; | |
176 | case SERIAL_IIR_CTI: | |
177 | dbg("Serial Port 2: Receiver time out"); | |
178 | break; | |
179 | case SERIAL_IIR_MS: | |
180 | dbg("Serial Port 2: Modem status change"); | |
181 | break; | |
182 | } | |
183 | } | |
184 | ||
185 | exit: | |
186 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
187 | if (result) | |
188 | dev_err(&urb->dev->dev, | |
189 | "%s - Error %d submitting control urb\n", | |
190 | __FUNCTION__, result); | |
191 | return; | |
192 | } | |
193 | ||
194 | /* | |
195 | * mos7720_bulk_in_callback | |
196 | * this is the callback function for when we have received data on the | |
197 | * bulk in endpoint. | |
198 | */ | |
199 | static void mos7720_bulk_in_callback(struct urb *urb) | |
200 | { | |
201 | int status; | |
202 | unsigned char *data ; | |
203 | struct usb_serial_port *port; | |
204 | struct moschip_port *mos7720_port; | |
205 | struct tty_struct *tty; | |
206 | ||
207 | if (urb->status) { | |
208 | dbg("nonzero read bulk status received: %d",urb->status); | |
209 | return; | |
210 | } | |
211 | ||
212 | mos7720_port = urb->context; | |
213 | if (!mos7720_port) { | |
214 | dbg("%s","NULL mos7720_port pointer \n"); | |
215 | return ; | |
216 | } | |
217 | ||
218 | port = mos7720_port->port; | |
219 | ||
220 | dbg("Entering...%s", __FUNCTION__); | |
221 | ||
222 | data = urb->transfer_buffer; | |
223 | ||
224 | tty = port->tty; | |
225 | if (tty && urb->actual_length) { | |
226 | tty_buffer_request_room(tty, urb->actual_length); | |
227 | tty_insert_flip_string(tty, data, urb->actual_length); | |
228 | tty_flip_buffer_push(tty); | |
229 | } | |
230 | ||
231 | if (!port->read_urb) { | |
232 | dbg("URB KILLED !!!"); | |
233 | return; | |
234 | } | |
235 | ||
236 | if (port->read_urb->status != -EINPROGRESS) { | |
237 | port->read_urb->dev = port->serial->dev; | |
238 | ||
239 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
240 | if (status) | |
241 | dbg("usb_submit_urb(read bulk) failed, status = %d", | |
242 | status); | |
243 | } | |
244 | } | |
245 | ||
246 | /* | |
247 | * mos7720_bulk_out_data_callback | |
248 | * this is the callback function for when we have finished sending serial | |
249 | * data on the bulk out endpoint. | |
250 | */ | |
251 | static void mos7720_bulk_out_data_callback(struct urb *urb) | |
252 | { | |
253 | struct moschip_port *mos7720_port; | |
254 | struct tty_struct *tty; | |
255 | ||
256 | if (urb->status) { | |
257 | dbg("nonzero write bulk status received:%d", urb->status); | |
258 | return; | |
259 | } | |
260 | ||
261 | mos7720_port = urb->context; | |
262 | if (!mos7720_port) { | |
263 | dbg("NULL mos7720_port pointer"); | |
264 | return ; | |
265 | } | |
266 | ||
267 | dbg("Entering ........."); | |
268 | ||
269 | tty = mos7720_port->port->tty; | |
270 | ||
b963a844 JS |
271 | if (tty && mos7720_port->open) |
272 | tty_wakeup(tty); | |
0f64478c GKH |
273 | } |
274 | ||
275 | /* | |
276 | * send_mos_cmd | |
277 | * this function will be used for sending command to device | |
278 | */ | |
279 | static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value, | |
280 | __u16 index, void *data) | |
281 | { | |
282 | int status; | |
283 | unsigned int pipe; | |
284 | u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); | |
285 | __u8 requesttype; | |
286 | __u16 size = 0x0000; | |
287 | ||
288 | if (value < MOS_MAX_PORT) { | |
289 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
290 | value = value*0x100+0x100; | |
291 | } else { | |
292 | value = value*0x100+0x200; | |
293 | } | |
294 | } else { | |
295 | value = 0x0000; | |
296 | if ((product == MOSCHIP_DEVICE_ID_7715) && | |
297 | (index != 0x08)) { | |
298 | dbg("serial->product== MOSCHIP_DEVICE_ID_7715"); | |
299 | //index = 0x01 ; | |
300 | } | |
301 | } | |
302 | ||
303 | if (request == MOS_WRITE) { | |
304 | request = (__u8)MOS_WRITE; | |
305 | requesttype = (__u8)0x40; | |
306 | value = value + (__u16)*((unsigned char *)data); | |
307 | data = NULL; | |
308 | pipe = usb_sndctrlpipe(serial->dev, 0); | |
309 | } else { | |
310 | request = (__u8)MOS_READ; | |
311 | requesttype = (__u8)0xC0; | |
312 | size = 0x01; | |
313 | pipe = usb_rcvctrlpipe(serial->dev,0); | |
314 | } | |
315 | ||
316 | status = usb_control_msg(serial->dev, pipe, request, requesttype, | |
317 | value, index, data, size, MOS_WDR_TIMEOUT); | |
318 | ||
319 | if (status < 0) | |
320 | dbg("Command Write failed Value %x index %x\n",value,index); | |
321 | ||
322 | return status; | |
323 | } | |
324 | ||
325 | static int mos7720_open(struct usb_serial_port *port, struct file * filp) | |
326 | { | |
327 | struct usb_serial *serial; | |
328 | struct usb_serial_port *port0; | |
329 | struct urb *urb; | |
330 | struct moschip_serial *mos7720_serial; | |
331 | struct moschip_port *mos7720_port; | |
332 | int response; | |
333 | int port_number; | |
334 | char data; | |
fe4b65ec | 335 | int allocated_urbs = 0; |
0f64478c GKH |
336 | int j; |
337 | ||
338 | serial = port->serial; | |
339 | ||
340 | mos7720_port = usb_get_serial_port_data(port); | |
341 | if (mos7720_port == NULL) | |
342 | return -ENODEV; | |
343 | ||
344 | port0 = serial->port[0]; | |
345 | ||
346 | mos7720_serial = usb_get_serial_data(serial); | |
347 | ||
348 | if (mos7720_serial == NULL || port0 == NULL) | |
349 | return -ENODEV; | |
350 | ||
351 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
352 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
353 | ||
354 | /* Initialising the write urb pool */ | |
355 | for (j = 0; j < NUM_URBS; ++j) { | |
c2cf3f6e | 356 | urb = usb_alloc_urb(0,GFP_KERNEL); |
0f64478c GKH |
357 | mos7720_port->write_urb_pool[j] = urb; |
358 | ||
359 | if (urb == NULL) { | |
360 | err("No more urbs???"); | |
361 | continue; | |
362 | } | |
363 | ||
364 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
365 | GFP_KERNEL); | |
366 | if (!urb->transfer_buffer) { | |
367 | err("%s-out of memory for urb buffers.", __FUNCTION__); | |
fe4b65ec ON |
368 | usb_free_urb(mos7720_port->write_urb_pool[j]); |
369 | mos7720_port->write_urb_pool[j] = NULL; | |
0f64478c GKH |
370 | continue; |
371 | } | |
fe4b65ec | 372 | allocated_urbs++; |
0f64478c GKH |
373 | } |
374 | ||
fe4b65ec ON |
375 | if (!allocated_urbs) |
376 | return -ENOMEM; | |
377 | ||
0f64478c GKH |
378 | /* Initialize MCS7720 -- Write Init values to corresponding Registers |
379 | * | |
380 | * Register Index | |
381 | * 1 : IER | |
382 | * 2 : FCR | |
383 | * 3 : LCR | |
384 | * 4 : MCR | |
385 | * | |
386 | * 0x08 : SP1/2 Control Reg | |
387 | */ | |
388 | port_number = port->number - port->serial->minor; | |
389 | send_mos_cmd(port->serial, MOS_READ, port_number, UART_LSR, &data); | |
390 | dbg("SS::%p LSR:%x\n",mos7720_port, data); | |
391 | ||
392 | dbg("Check:Sending Command .........."); | |
393 | ||
394 | data = 0x02; | |
395 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x01, &data); | |
396 | data = 0x02; | |
397 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x02, &data); | |
398 | ||
399 | data = 0x00; | |
400 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
401 | data = 0x00; | |
402 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data); | |
403 | ||
404 | data = 0xCF; | |
405 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data); | |
406 | data = 0x03; | |
407 | mos7720_port->shadowLCR = data; | |
408 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
409 | data = 0x0b; | |
410 | mos7720_port->shadowMCR = data; | |
411 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
412 | data = 0x0b; | |
413 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
414 | ||
415 | data = 0x00; | |
416 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); | |
417 | data = 0x00; | |
418 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); | |
419 | ||
420 | /* data = 0x00; | |
421 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, port_number + 1, &data); | |
422 | data = 0x03; | |
423 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data); | |
424 | data = 0x00; | |
425 | send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data); | |
426 | */ | |
427 | data = 0x00; | |
428 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); | |
429 | ||
430 | data = data | (port->number - port->serial->minor + 1); | |
431 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); | |
432 | ||
433 | data = 0x83; | |
434 | mos7720_port->shadowLCR = data; | |
435 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
436 | data = 0x0c; | |
437 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data); | |
438 | data = 0x00; | |
439 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
440 | data = 0x03; | |
441 | mos7720_port->shadowLCR = data; | |
442 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
443 | data = 0x0c; | |
444 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
445 | data = 0x0c; | |
446 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
447 | ||
448 | //Matrix | |
449 | ||
450 | /* force low_latency on so that our tty_push actually forces * | |
451 | * the data through,otherwise it is scheduled, and with * | |
452 | * high data rates (like with OHCI) data can get lost. */ | |
453 | ||
454 | if (port->tty) | |
455 | port->tty->low_latency = 1; | |
456 | ||
457 | /* see if we've set up our endpoint info yet * | |
458 | * (can't set it up in mos7720_startup as the * | |
459 | * structures were not set up at that time.) */ | |
460 | if (!mos7720_serial->interrupt_started) { | |
461 | dbg("Interrupt buffer NULL !!!"); | |
462 | ||
463 | /* not set up yet, so do it now */ | |
464 | mos7720_serial->interrupt_started = 1; | |
465 | ||
466 | dbg("To Submit URB !!!"); | |
467 | ||
468 | /* set up our interrupt urb */ | |
469 | usb_fill_int_urb(port0->interrupt_in_urb, serial->dev, | |
470 | usb_rcvintpipe(serial->dev, | |
471 | port->interrupt_in_endpointAddress), | |
472 | port0->interrupt_in_buffer, | |
473 | port0->interrupt_in_urb->transfer_buffer_length, | |
474 | mos7720_interrupt_callback, mos7720_port, | |
475 | port0->interrupt_in_urb->interval); | |
476 | ||
477 | /* start interrupt read for this mos7720 this interrupt * | |
478 | * will continue as long as the mos7720 is connected */ | |
479 | dbg("Submit URB over !!!"); | |
480 | response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL); | |
481 | if (response) | |
482 | dev_err(&port->dev, | |
483 | "%s - Error %d submitting control urb", | |
484 | __FUNCTION__, response); | |
485 | } | |
486 | ||
487 | /* set up our bulk in urb */ | |
488 | usb_fill_bulk_urb(port->read_urb, serial->dev, | |
489 | usb_rcvbulkpipe(serial->dev, | |
490 | port->bulk_in_endpointAddress), | |
491 | port->bulk_in_buffer, | |
492 | port->read_urb->transfer_buffer_length, | |
493 | mos7720_bulk_in_callback, mos7720_port); | |
494 | response = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
495 | if (response) | |
496 | dev_err(&port->dev, | |
497 | "%s - Error %d submitting read urb", __FUNCTION__, response); | |
498 | ||
499 | /* initialize our icount structure */ | |
500 | memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount)); | |
501 | ||
502 | /* initialize our port settings */ | |
503 | mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */ | |
504 | ||
505 | /* send a open port command */ | |
506 | mos7720_port->open = 1; | |
507 | ||
508 | return 0; | |
509 | } | |
510 | ||
511 | /* | |
512 | * mos7720_chars_in_buffer | |
513 | * this function is called by the tty driver when it wants to know how many | |
514 | * bytes of data we currently have outstanding in the port (data that has | |
515 | * been written, but hasn't made it out the port yet) | |
516 | * If successful, we return the number of bytes left to be written in the | |
517 | * system, | |
518 | * Otherwise we return a negative error number. | |
519 | */ | |
520 | static int mos7720_chars_in_buffer(struct usb_serial_port *port) | |
521 | { | |
522 | int i; | |
523 | int chars = 0; | |
524 | struct moschip_port *mos7720_port; | |
525 | ||
526 | dbg("%s:entering ...........", __FUNCTION__); | |
527 | ||
528 | mos7720_port = usb_get_serial_port_data(port); | |
529 | if (mos7720_port == NULL) { | |
530 | dbg("%s:leaving ...........", __FUNCTION__); | |
531 | return -ENODEV; | |
532 | } | |
533 | ||
534 | for (i = 0; i < NUM_URBS; ++i) { | |
fe4b65ec | 535 | if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status == -EINPROGRESS) |
0f64478c GKH |
536 | chars += URB_TRANSFER_BUFFER_SIZE; |
537 | } | |
538 | dbg("%s - returns %d", __FUNCTION__, chars); | |
539 | return chars; | |
540 | } | |
541 | ||
542 | static void mos7720_close(struct usb_serial_port *port, struct file *filp) | |
543 | { | |
544 | struct usb_serial *serial; | |
545 | struct moschip_port *mos7720_port; | |
546 | char data; | |
547 | int j; | |
548 | ||
549 | dbg("mos7720_close:entering..."); | |
550 | ||
551 | serial = port->serial; | |
552 | ||
553 | mos7720_port = usb_get_serial_port_data(port); | |
554 | if (mos7720_port == NULL) | |
555 | return; | |
556 | ||
557 | for (j = 0; j < NUM_URBS; ++j) | |
558 | usb_kill_urb(mos7720_port->write_urb_pool[j]); | |
559 | ||
560 | /* Freeing Write URBs */ | |
561 | for (j = 0; j < NUM_URBS; ++j) { | |
562 | if (mos7720_port->write_urb_pool[j]) { | |
563 | kfree(mos7720_port->write_urb_pool[j]->transfer_buffer); | |
564 | usb_free_urb(mos7720_port->write_urb_pool[j]); | |
565 | } | |
566 | } | |
567 | ||
568 | /* While closing port, shutdown all bulk read, write * | |
569 | * and interrupt read if they exists */ | |
570 | if (serial->dev) { | |
571 | dbg("Shutdown bulk write"); | |
572 | usb_kill_urb(port->write_urb); | |
573 | dbg("Shutdown bulk read"); | |
574 | usb_kill_urb(port->read_urb); | |
575 | } | |
576 | ||
577 | data = 0x00; | |
578 | send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, | |
579 | 0x04, &data); | |
580 | ||
581 | data = 0x00; | |
582 | send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, | |
583 | 0x01, &data); | |
584 | ||
585 | mos7720_port->open = 0; | |
586 | ||
587 | dbg("Leaving %s", __FUNCTION__); | |
588 | } | |
589 | ||
590 | static void mos7720_break(struct usb_serial_port *port, int break_state) | |
591 | { | |
592 | unsigned char data; | |
593 | struct usb_serial *serial; | |
594 | struct moschip_port *mos7720_port; | |
595 | ||
596 | dbg("Entering %s", __FUNCTION__); | |
597 | ||
598 | serial = port->serial; | |
599 | ||
600 | mos7720_port = usb_get_serial_port_data(port); | |
601 | if (mos7720_port == NULL) | |
602 | return; | |
603 | ||
604 | if (break_state == -1) | |
605 | data = mos7720_port->shadowLCR | UART_LCR_SBC; | |
606 | else | |
607 | data = mos7720_port->shadowLCR & ~UART_LCR_SBC; | |
608 | ||
609 | mos7720_port->shadowLCR = data; | |
610 | send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, | |
611 | 0x03, &data); | |
612 | ||
613 | return; | |
614 | } | |
615 | ||
616 | /* | |
617 | * mos7720_write_room | |
618 | * this function is called by the tty driver when it wants to know how many | |
619 | * bytes of data we can accept for a specific port. | |
620 | * If successful, we return the amount of room that we have for this port | |
621 | * Otherwise we return a negative error number. | |
622 | */ | |
623 | static int mos7720_write_room(struct usb_serial_port *port) | |
624 | { | |
625 | struct moschip_port *mos7720_port; | |
626 | int room = 0; | |
627 | int i; | |
628 | ||
629 | dbg("%s:entering ...........", __FUNCTION__); | |
630 | ||
631 | mos7720_port = usb_get_serial_port_data(port); | |
632 | if (mos7720_port == NULL) { | |
633 | dbg("%s:leaving ...........", __FUNCTION__); | |
634 | return -ENODEV; | |
635 | } | |
636 | ||
637 | for (i = 0; i < NUM_URBS; ++i) { | |
fe4b65ec | 638 | if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) |
0f64478c GKH |
639 | room += URB_TRANSFER_BUFFER_SIZE; |
640 | } | |
641 | ||
642 | dbg("%s - returns %d", __FUNCTION__, room); | |
643 | return room; | |
644 | } | |
645 | ||
646 | static int mos7720_write(struct usb_serial_port *port, | |
647 | const unsigned char *data, int count) | |
648 | { | |
649 | int status; | |
650 | int i; | |
651 | int bytes_sent = 0; | |
652 | int transfer_size; | |
653 | ||
654 | struct moschip_port *mos7720_port; | |
655 | struct usb_serial *serial; | |
656 | struct urb *urb; | |
657 | const unsigned char *current_position = data; | |
658 | ||
659 | dbg("%s:entering ...........", __FUNCTION__); | |
660 | ||
661 | serial = port->serial; | |
662 | ||
663 | mos7720_port = usb_get_serial_port_data(port); | |
664 | if (mos7720_port == NULL) { | |
665 | dbg("mos7720_port is NULL"); | |
666 | return -ENODEV; | |
667 | } | |
668 | ||
669 | /* try to find a free urb in the list */ | |
670 | urb = NULL; | |
671 | ||
672 | for (i = 0; i < NUM_URBS; ++i) { | |
fe4b65ec | 673 | if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) { |
0f64478c GKH |
674 | urb = mos7720_port->write_urb_pool[i]; |
675 | dbg("URB:%d",i); | |
676 | break; | |
677 | } | |
678 | } | |
679 | ||
680 | if (urb == NULL) { | |
681 | dbg("%s - no more free urbs", __FUNCTION__); | |
682 | goto exit; | |
683 | } | |
684 | ||
685 | if (urb->transfer_buffer == NULL) { | |
686 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
687 | GFP_KERNEL); | |
688 | if (urb->transfer_buffer == NULL) { | |
689 | err("%s no more kernel memory...", __FUNCTION__); | |
690 | goto exit; | |
691 | } | |
692 | } | |
693 | transfer_size = min (count, URB_TRANSFER_BUFFER_SIZE); | |
694 | ||
695 | memcpy(urb->transfer_buffer, current_position, transfer_size); | |
696 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, | |
697 | urb->transfer_buffer); | |
698 | ||
699 | /* fill urb with data and submit */ | |
700 | usb_fill_bulk_urb(urb, serial->dev, | |
701 | usb_sndbulkpipe(serial->dev, | |
702 | port->bulk_out_endpointAddress), | |
703 | urb->transfer_buffer, transfer_size, | |
704 | mos7720_bulk_out_data_callback, mos7720_port); | |
705 | ||
706 | /* send it down the pipe */ | |
707 | status = usb_submit_urb(urb,GFP_ATOMIC); | |
708 | if (status) { | |
709 | err("%s - usb_submit_urb(write bulk) failed with status = %d", | |
710 | __FUNCTION__, status); | |
711 | bytes_sent = status; | |
712 | goto exit; | |
713 | } | |
714 | bytes_sent = transfer_size; | |
715 | ||
716 | exit: | |
717 | return bytes_sent; | |
718 | } | |
719 | ||
720 | static void mos7720_throttle(struct usb_serial_port *port) | |
721 | { | |
722 | struct moschip_port *mos7720_port; | |
723 | struct tty_struct *tty; | |
724 | int status; | |
725 | ||
726 | dbg("%s- port %d\n", __FUNCTION__, port->number); | |
727 | ||
728 | mos7720_port = usb_get_serial_port_data(port); | |
729 | ||
730 | if (mos7720_port == NULL) | |
731 | return; | |
732 | ||
733 | if (!mos7720_port->open) { | |
734 | dbg("port not opened"); | |
735 | return; | |
736 | } | |
737 | ||
738 | dbg("%s: Entering ..........", __FUNCTION__); | |
739 | ||
740 | tty = port->tty; | |
741 | if (!tty) { | |
742 | dbg("%s - no tty available", __FUNCTION__); | |
743 | return; | |
744 | } | |
745 | ||
746 | /* if we are implementing XON/XOFF, send the stop character */ | |
747 | if (I_IXOFF(tty)) { | |
748 | unsigned char stop_char = STOP_CHAR(tty); | |
749 | status = mos7720_write(port, &stop_char, 1); | |
750 | if (status <= 0) | |
751 | return; | |
752 | } | |
753 | ||
754 | /* if we are implementing RTS/CTS, toggle that line */ | |
755 | if (tty->termios->c_cflag & CRTSCTS) { | |
756 | mos7720_port->shadowMCR &= ~UART_MCR_RTS; | |
757 | status = send_mos_cmd(port->serial, MOS_WRITE, | |
758 | port->number - port->serial->minor, | |
759 | UART_MCR, &mos7720_port->shadowMCR); | |
760 | if (status != 0) | |
761 | return; | |
762 | } | |
763 | } | |
764 | ||
765 | static void mos7720_unthrottle(struct usb_serial_port *port) | |
766 | { | |
767 | struct tty_struct *tty; | |
768 | int status; | |
769 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
770 | ||
771 | if (mos7720_port == NULL) | |
772 | return; | |
773 | ||
774 | if (!mos7720_port->open) { | |
775 | dbg("%s - port not opened", __FUNCTION__); | |
776 | return; | |
777 | } | |
778 | ||
779 | dbg("%s: Entering ..........", __FUNCTION__); | |
780 | ||
781 | tty = port->tty; | |
782 | if (!tty) { | |
783 | dbg("%s - no tty available", __FUNCTION__); | |
784 | return; | |
785 | } | |
786 | ||
787 | /* if we are implementing XON/XOFF, send the start character */ | |
788 | if (I_IXOFF(tty)) { | |
789 | unsigned char start_char = START_CHAR(tty); | |
790 | status = mos7720_write(port, &start_char, 1); | |
791 | if (status <= 0) | |
792 | return; | |
793 | } | |
794 | ||
795 | /* if we are implementing RTS/CTS, toggle that line */ | |
796 | if (tty->termios->c_cflag & CRTSCTS) { | |
797 | mos7720_port->shadowMCR |= UART_MCR_RTS; | |
798 | status = send_mos_cmd(port->serial, MOS_WRITE, | |
799 | port->number - port->serial->minor, | |
800 | UART_MCR, &mos7720_port->shadowMCR); | |
801 | if (status != 0) | |
802 | return; | |
803 | } | |
804 | } | |
805 | ||
806 | static int set_higher_rates(struct moschip_port *mos7720_port, | |
807 | unsigned int baud) | |
808 | { | |
809 | unsigned char data; | |
810 | struct usb_serial_port *port; | |
811 | struct usb_serial *serial; | |
812 | int port_number; | |
813 | ||
814 | if (mos7720_port == NULL) | |
815 | return -EINVAL; | |
816 | ||
817 | port = mos7720_port->port; | |
818 | serial = port->serial; | |
819 | ||
820 | /*********************************************** | |
821 | * Init Sequence for higher rates | |
822 | ***********************************************/ | |
823 | dbg("Sending Setting Commands .........."); | |
824 | port_number = port->number - port->serial->minor; | |
825 | ||
826 | data = 0x000; | |
827 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
828 | data = 0x000; | |
829 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data); | |
830 | data = 0x0CF; | |
831 | send_mos_cmd(serial, MOS_WRITE, port->number, 0x02, &data); | |
832 | data = 0x00b; | |
833 | mos7720_port->shadowMCR = data; | |
834 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
835 | data = 0x00b; | |
836 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
837 | ||
838 | data = 0x000; | |
839 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); | |
840 | data = 0x000; | |
841 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); | |
842 | ||
843 | ||
844 | /*********************************************** | |
845 | * Set for higher rates * | |
846 | ***********************************************/ | |
847 | ||
848 | data = baud * 0x10; | |
849 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1,&data); | |
850 | ||
851 | data = 0x003; | |
852 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); | |
853 | data = 0x003; | |
854 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); | |
855 | ||
856 | data = 0x02b; | |
857 | mos7720_port->shadowMCR = data; | |
858 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
859 | data = 0x02b; | |
860 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
861 | ||
862 | /*********************************************** | |
863 | * Set DLL/DLM | |
864 | ***********************************************/ | |
865 | ||
866 | data = mos7720_port->shadowLCR | UART_LCR_DLAB; | |
867 | mos7720_port->shadowLCR = data; | |
868 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
869 | ||
870 | data = 0x001; /* DLL */ | |
871 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data); | |
872 | data = 0x000; /* DLM */ | |
873 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
874 | ||
875 | data = mos7720_port->shadowLCR & ~UART_LCR_DLAB; | |
876 | mos7720_port->shadowLCR = data; | |
877 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
882 | /* baud rate information */ | |
883 | struct divisor_table_entry | |
884 | { | |
885 | __u32 baudrate; | |
886 | __u16 divisor; | |
887 | }; | |
888 | ||
889 | /* Define table of divisors for moschip 7720 hardware * | |
890 | * These assume a 3.6864MHz crystal, the standard /16, and * | |
891 | * MCR.7 = 0. */ | |
892 | static struct divisor_table_entry divisor_table[] = { | |
893 | { 50, 2304}, | |
894 | { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ | |
895 | { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ | |
896 | { 150, 768}, | |
897 | { 300, 384}, | |
898 | { 600, 192}, | |
899 | { 1200, 96}, | |
900 | { 1800, 64}, | |
901 | { 2400, 48}, | |
902 | { 4800, 24}, | |
903 | { 7200, 16}, | |
904 | { 9600, 12}, | |
905 | { 19200, 6}, | |
906 | { 38400, 3}, | |
907 | { 57600, 2}, | |
908 | { 115200, 1}, | |
909 | }; | |
910 | ||
911 | /***************************************************************************** | |
912 | * calc_baud_rate_divisor | |
913 | * this function calculates the proper baud rate divisor for the specified | |
914 | * baud rate. | |
915 | *****************************************************************************/ | |
916 | static int calc_baud_rate_divisor(int baudrate, int *divisor) | |
917 | { | |
918 | int i; | |
919 | __u16 custom; | |
920 | __u16 round1; | |
921 | __u16 round; | |
922 | ||
923 | ||
924 | dbg("%s - %d", __FUNCTION__, baudrate); | |
925 | ||
926 | for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { | |
927 | if (divisor_table[i].baudrate == baudrate) { | |
928 | *divisor = divisor_table[i].divisor; | |
929 | return 0; | |
930 | } | |
931 | } | |
932 | ||
933 | /* After trying for all the standard baud rates * | |
934 | * Try calculating the divisor for this baud rate */ | |
935 | if (baudrate > 75 && baudrate < 230400) { | |
936 | /* get the divisor */ | |
937 | custom = (__u16)(230400L / baudrate); | |
938 | ||
939 | /* Check for round off */ | |
940 | round1 = (__u16)(2304000L / baudrate); | |
941 | round = (__u16)(round1 - (custom * 10)); | |
942 | if (round > 4) | |
943 | custom++; | |
944 | *divisor = custom; | |
945 | ||
946 | dbg("Baud %d = %d",baudrate, custom); | |
947 | return 0; | |
948 | } | |
949 | ||
950 | dbg("Baud calculation Failed..."); | |
951 | return -EINVAL; | |
952 | } | |
953 | ||
954 | /* | |
955 | * send_cmd_write_baud_rate | |
956 | * this function sends the proper command to change the baud rate of the | |
957 | * specified port. | |
958 | */ | |
959 | static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port, | |
960 | int baudrate) | |
961 | { | |
962 | struct usb_serial_port *port; | |
963 | struct usb_serial *serial; | |
964 | int divisor; | |
965 | int status; | |
966 | unsigned char data; | |
967 | unsigned char number; | |
968 | ||
969 | if (mos7720_port == NULL) | |
970 | return -1; | |
971 | ||
972 | port = mos7720_port->port; | |
973 | serial = port->serial; | |
974 | ||
975 | dbg("%s: Entering ..........", __FUNCTION__); | |
976 | ||
977 | number = port->number - port->serial->minor; | |
978 | dbg("%s - port = %d, baud = %d", __FUNCTION__, port->number, baudrate); | |
979 | ||
980 | /* Calculate the Divisor */ | |
981 | status = calc_baud_rate_divisor(baudrate, &divisor); | |
982 | if (status) { | |
983 | err("%s - bad baud rate", __FUNCTION__); | |
984 | return status; | |
985 | } | |
986 | ||
987 | /* Enable access to divisor latch */ | |
988 | data = mos7720_port->shadowLCR | UART_LCR_DLAB; | |
989 | mos7720_port->shadowLCR = data; | |
990 | send_mos_cmd(serial, MOS_WRITE, number, UART_LCR, &data); | |
991 | ||
992 | /* Write the divisor */ | |
993 | data = ((unsigned char)(divisor & 0xff)); | |
994 | send_mos_cmd(serial, MOS_WRITE, number, 0x00, &data); | |
995 | ||
996 | data = ((unsigned char)((divisor & 0xff00) >> 8)); | |
997 | send_mos_cmd(serial, MOS_WRITE, number, 0x01, &data); | |
998 | ||
999 | /* Disable access to divisor latch */ | |
1000 | data = mos7720_port->shadowLCR & ~UART_LCR_DLAB; | |
1001 | mos7720_port->shadowLCR = data; | |
1002 | send_mos_cmd(serial, MOS_WRITE, number, 0x03, &data); | |
1003 | ||
1004 | return status; | |
1005 | } | |
1006 | ||
1007 | /* | |
1008 | * change_port_settings | |
1009 | * This routine is called to set the UART on the device to match | |
1010 | * the specified new settings. | |
1011 | */ | |
1012 | static void change_port_settings(struct moschip_port *mos7720_port, | |
606d099c | 1013 | struct ktermios *old_termios) |
0f64478c GKH |
1014 | { |
1015 | struct usb_serial_port *port; | |
1016 | struct usb_serial *serial; | |
1017 | struct tty_struct *tty; | |
1018 | int baud; | |
1019 | unsigned cflag; | |
1020 | unsigned iflag; | |
1021 | __u8 mask = 0xff; | |
1022 | __u8 lData; | |
1023 | __u8 lParity; | |
1024 | __u8 lStop; | |
1025 | int status; | |
1026 | int port_number; | |
1027 | char data; | |
1028 | ||
1029 | if (mos7720_port == NULL) | |
1030 | return ; | |
1031 | ||
1032 | port = mos7720_port->port; | |
1033 | serial = port->serial; | |
1034 | port_number = port->number - port->serial->minor; | |
1035 | ||
1036 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1037 | ||
1038 | if (!mos7720_port->open) { | |
1039 | dbg("%s - port not opened", __FUNCTION__); | |
1040 | return; | |
1041 | } | |
1042 | ||
1043 | tty = mos7720_port->port->tty; | |
1044 | ||
1045 | if ((!tty) || (!tty->termios)) { | |
1046 | dbg("%s - no tty structures", __FUNCTION__); | |
1047 | return; | |
1048 | } | |
1049 | ||
1050 | dbg("%s: Entering ..........", __FUNCTION__); | |
1051 | ||
1052 | lData = UART_LCR_WLEN8; | |
1053 | lStop = 0x00; /* 1 stop bit */ | |
1054 | lParity = 0x00; /* No parity */ | |
1055 | ||
1056 | cflag = tty->termios->c_cflag; | |
1057 | iflag = tty->termios->c_iflag; | |
1058 | ||
1059 | /* Change the number of bits */ | |
1060 | switch (cflag & CSIZE) { | |
1061 | case CS5: | |
1062 | lData = UART_LCR_WLEN5; | |
1063 | mask = 0x1f; | |
1064 | break; | |
1065 | ||
1066 | case CS6: | |
1067 | lData = UART_LCR_WLEN6; | |
1068 | mask = 0x3f; | |
1069 | break; | |
1070 | ||
1071 | case CS7: | |
1072 | lData = UART_LCR_WLEN7; | |
1073 | mask = 0x7f; | |
1074 | break; | |
1075 | default: | |
1076 | case CS8: | |
1077 | lData = UART_LCR_WLEN8; | |
1078 | break; | |
1079 | } | |
1080 | ||
1081 | /* Change the Parity bit */ | |
1082 | if (cflag & PARENB) { | |
1083 | if (cflag & PARODD) { | |
1084 | lParity = UART_LCR_PARITY; | |
1085 | dbg("%s - parity = odd", __FUNCTION__); | |
1086 | } else { | |
1087 | lParity = (UART_LCR_EPAR | UART_LCR_PARITY); | |
1088 | dbg("%s - parity = even", __FUNCTION__); | |
1089 | } | |
1090 | ||
1091 | } else { | |
1092 | dbg("%s - parity = none", __FUNCTION__); | |
1093 | } | |
1094 | ||
1095 | if (cflag & CMSPAR) | |
1096 | lParity = lParity | 0x20; | |
1097 | ||
1098 | /* Change the Stop bit */ | |
1099 | if (cflag & CSTOPB) { | |
1100 | lStop = UART_LCR_STOP; | |
1101 | dbg("%s - stop bits = 2", __FUNCTION__); | |
1102 | } else { | |
1103 | lStop = 0x00; | |
1104 | dbg("%s - stop bits = 1", __FUNCTION__); | |
1105 | } | |
1106 | ||
1107 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
1108 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
1109 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
1110 | ||
1111 | /* Update the LCR with the correct value */ | |
1112 | mos7720_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); | |
1113 | mos7720_port->shadowLCR |= (lData | lParity | lStop); | |
1114 | ||
1115 | ||
1116 | /* Disable Interrupts */ | |
1117 | data = 0x00; | |
1118 | send_mos_cmd(serial,MOS_WRITE,port->number - port->serial->minor, UART_IER, &data); | |
1119 | ||
1120 | data = 0x00; | |
1121 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data); | |
1122 | ||
1123 | data = 0xcf; | |
1124 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data); | |
1125 | ||
1126 | /* Send the updated LCR value to the mos7720 */ | |
1127 | data = mos7720_port->shadowLCR; | |
1128 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_LCR, &data); | |
1129 | ||
1130 | data = 0x00b; | |
1131 | mos7720_port->shadowMCR = data; | |
1132 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
1133 | data = 0x00b; | |
1134 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
1135 | ||
1136 | /* set up the MCR register and send it to the mos7720 */ | |
1137 | mos7720_port->shadowMCR = UART_MCR_OUT2; | |
1138 | if (cflag & CBAUD) | |
1139 | mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS); | |
1140 | ||
1141 | if (cflag & CRTSCTS) { | |
1142 | mos7720_port->shadowMCR |= (UART_MCR_XONANY); | |
1143 | ||
1144 | /* To set hardware flow control to the specified * | |
1145 | * serial port, in SP1/2_CONTROL_REG */ | |
1146 | if (port->number) { | |
1147 | data = 0x001; | |
1148 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, | |
1149 | 0x08, &data); | |
1150 | } else { | |
1151 | data = 0x002; | |
1152 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, | |
1153 | 0x08, &data); | |
1154 | } | |
1155 | } else { | |
1156 | mos7720_port->shadowMCR &= ~(UART_MCR_XONANY); | |
1157 | } | |
1158 | ||
1159 | data = mos7720_port->shadowMCR; | |
1160 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_MCR, &data); | |
1161 | ||
1162 | /* Determine divisor based on baud rate */ | |
1163 | baud = tty_get_baud_rate(tty); | |
1164 | if (!baud) { | |
1165 | /* pick a default, any default... */ | |
1166 | dbg("Picked default baud..."); | |
1167 | baud = 9600; | |
1168 | } | |
1169 | ||
1170 | if (baud >= 230400) { | |
1171 | set_higher_rates(mos7720_port, baud); | |
1172 | /* Enable Interrupts */ | |
1173 | data = 0x0c; | |
1174 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data); | |
1175 | return; | |
1176 | } | |
1177 | ||
1178 | dbg("%s - baud rate = %d", __FUNCTION__, baud); | |
1179 | status = send_cmd_write_baud_rate(mos7720_port, baud); | |
1180 | ||
1181 | /* Enable Interrupts */ | |
1182 | data = 0x0c; | |
1183 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data); | |
1184 | ||
1185 | if (port->read_urb->status != -EINPROGRESS) { | |
1186 | port->read_urb->dev = serial->dev; | |
1187 | ||
1188 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
1189 | if (status) | |
1190 | dbg("usb_submit_urb(read bulk) failed, status = %d", | |
1191 | status); | |
1192 | } | |
1193 | return; | |
1194 | } | |
1195 | ||
1196 | /* | |
1197 | * mos7720_set_termios | |
1198 | * this function is called by the tty driver when it wants to change the | |
1199 | * termios structure. | |
1200 | */ | |
1201 | static void mos7720_set_termios(struct usb_serial_port *port, | |
606d099c | 1202 | struct ktermios *old_termios) |
0f64478c GKH |
1203 | { |
1204 | int status; | |
1205 | unsigned int cflag; | |
1206 | struct usb_serial *serial; | |
1207 | struct moschip_port *mos7720_port; | |
1208 | struct tty_struct *tty; | |
1209 | ||
1210 | serial = port->serial; | |
1211 | ||
1212 | mos7720_port = usb_get_serial_port_data(port); | |
1213 | ||
1214 | if (mos7720_port == NULL) | |
1215 | return; | |
1216 | ||
1217 | tty = port->tty; | |
1218 | ||
1219 | if (!port->tty || !port->tty->termios) { | |
1220 | dbg("%s - no tty or termios", __FUNCTION__); | |
1221 | return; | |
1222 | } | |
1223 | ||
1224 | if (!mos7720_port->open) { | |
1225 | dbg("%s - port not opened", __FUNCTION__); | |
1226 | return; | |
1227 | } | |
1228 | ||
1229 | dbg("%s\n","setting termios - ASPIRE"); | |
1230 | ||
1231 | cflag = tty->termios->c_cflag; | |
1232 | ||
1233 | if (!cflag) { | |
1234 | printk("%s %s\n",__FUNCTION__,"cflag is NULL"); | |
1235 | return; | |
1236 | } | |
1237 | ||
1238 | /* check that they really want us to change something */ | |
1239 | if (old_termios) { | |
1240 | if ((cflag == old_termios->c_cflag) && | |
1241 | (RELEVANT_IFLAG(tty->termios->c_iflag) == | |
1242 | RELEVANT_IFLAG(old_termios->c_iflag))) { | |
1243 | dbg("Nothing to change"); | |
1244 | return; | |
1245 | } | |
1246 | } | |
1247 | ||
1248 | dbg("%s - clfag %08x iflag %08x", __FUNCTION__, | |
1249 | tty->termios->c_cflag, | |
1250 | RELEVANT_IFLAG(tty->termios->c_iflag)); | |
1251 | ||
1252 | if (old_termios) | |
1253 | dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__, | |
1254 | old_termios->c_cflag, | |
1255 | RELEVANT_IFLAG(old_termios->c_iflag)); | |
1256 | ||
1257 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1258 | ||
1259 | /* change the port settings to the new ones specified */ | |
1260 | change_port_settings(mos7720_port, old_termios); | |
1261 | ||
1262 | if(!port->read_urb) { | |
1263 | dbg("%s","URB KILLED !!!!!\n"); | |
1264 | return; | |
1265 | } | |
1266 | ||
1267 | if(port->read_urb->status != -EINPROGRESS) { | |
1268 | port->read_urb->dev = serial->dev; | |
1269 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
1270 | if (status) | |
1271 | dbg("usb_submit_urb(read bulk) failed, status = %d", | |
1272 | status); | |
1273 | } | |
1274 | return; | |
1275 | } | |
1276 | ||
1277 | /* | |
1278 | * get_lsr_info - get line status register info | |
1279 | * | |
1280 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1281 | * is emptied. On bus types like RS485, the transmitter must | |
1282 | * release the bus after transmitting. This must be done when | |
1283 | * the transmit shift register is empty, not be done when the | |
1284 | * transmit holding register is empty. This functionality | |
1285 | * allows an RS485 driver to be written in user space. | |
1286 | */ | |
1287 | static int get_lsr_info(struct moschip_port *mos7720_port, | |
1288 | unsigned int __user *value) | |
1289 | { | |
1290 | int count; | |
1291 | unsigned int result = 0; | |
1292 | ||
1293 | count = mos7720_chars_in_buffer(mos7720_port->port); | |
1294 | if (count == 0) { | |
1295 | dbg("%s -- Empty", __FUNCTION__); | |
1296 | result = TIOCSER_TEMT; | |
1297 | } | |
1298 | ||
1299 | if (copy_to_user(value, &result, sizeof(int))) | |
1300 | return -EFAULT; | |
1301 | return 0; | |
1302 | } | |
1303 | ||
1304 | /* | |
1305 | * get_number_bytes_avail - get number of bytes available | |
1306 | * | |
1307 | * Purpose: Let user call ioctl to get the count of number of bytes available. | |
1308 | */ | |
1309 | static int get_number_bytes_avail(struct moschip_port *mos7720_port, | |
1310 | unsigned int __user *value) | |
1311 | { | |
1312 | unsigned int result = 0; | |
1313 | struct tty_struct *tty = mos7720_port->port->tty; | |
1314 | ||
1315 | if (!tty) | |
1316 | return -ENOIOCTLCMD; | |
1317 | ||
1318 | result = tty->read_cnt; | |
1319 | ||
1320 | dbg("%s(%d) = %d", __FUNCTION__, mos7720_port->port->number, result); | |
1321 | if (copy_to_user(value, &result, sizeof(int))) | |
1322 | return -EFAULT; | |
1323 | ||
1324 | return -ENOIOCTLCMD; | |
1325 | } | |
1326 | ||
1327 | static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd, | |
1328 | unsigned int __user *value) | |
1329 | { | |
1330 | unsigned int mcr ; | |
1331 | unsigned int arg; | |
1332 | unsigned char data; | |
1333 | ||
1334 | struct usb_serial_port *port; | |
1335 | ||
1336 | if (mos7720_port == NULL) | |
1337 | return -1; | |
1338 | ||
1339 | port = (struct usb_serial_port*)mos7720_port->port; | |
1340 | mcr = mos7720_port->shadowMCR; | |
1341 | ||
1342 | if (copy_from_user(&arg, value, sizeof(int))) | |
1343 | return -EFAULT; | |
1344 | ||
1345 | switch (cmd) { | |
1346 | case TIOCMBIS: | |
1347 | if (arg & TIOCM_RTS) | |
1348 | mcr |= UART_MCR_RTS; | |
1349 | if (arg & TIOCM_DTR) | |
1350 | mcr |= UART_MCR_RTS; | |
1351 | if (arg & TIOCM_LOOP) | |
1352 | mcr |= UART_MCR_LOOP; | |
1353 | break; | |
1354 | ||
1355 | case TIOCMBIC: | |
1356 | if (arg & TIOCM_RTS) | |
1357 | mcr &= ~UART_MCR_RTS; | |
1358 | if (arg & TIOCM_DTR) | |
1359 | mcr &= ~UART_MCR_RTS; | |
1360 | if (arg & TIOCM_LOOP) | |
1361 | mcr &= ~UART_MCR_LOOP; | |
1362 | break; | |
1363 | ||
1364 | case TIOCMSET: | |
1365 | /* turn off the RTS and DTR and LOOPBACK | |
1366 | * and then only turn on what was asked to */ | |
1367 | mcr &= ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP); | |
1368 | mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0); | |
1369 | mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0); | |
1370 | mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0); | |
1371 | break; | |
1372 | } | |
1373 | ||
1374 | mos7720_port->shadowMCR = mcr; | |
1375 | ||
1376 | data = mos7720_port->shadowMCR; | |
1377 | send_mos_cmd(port->serial, MOS_WRITE, | |
1378 | port->number - port->serial->minor, UART_MCR, &data); | |
1379 | ||
1380 | return 0; | |
1381 | } | |
1382 | ||
1383 | static int get_modem_info(struct moschip_port *mos7720_port, | |
1384 | unsigned int __user *value) | |
1385 | { | |
1386 | unsigned int result = 0; | |
1387 | unsigned int msr = mos7720_port->shadowMSR; | |
1388 | unsigned int mcr = mos7720_port->shadowMCR; | |
1389 | ||
1390 | result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ | |
1391 | | ((mcr & UART_MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ | |
1392 | | ((msr & UART_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ | |
1393 | | ((msr & UART_MSR_DCD) ? TIOCM_CAR: 0) /* 0x040 */ | |
1394 | | ((msr & UART_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ | |
1395 | | ((msr & UART_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ | |
1396 | ||
1397 | ||
1398 | dbg("%s -- %x", __FUNCTION__, result); | |
1399 | ||
1400 | if (copy_to_user(value, &result, sizeof(int))) | |
1401 | return -EFAULT; | |
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | static int get_serial_info(struct moschip_port *mos7720_port, | |
1406 | struct serial_struct __user *retinfo) | |
1407 | { | |
1408 | struct serial_struct tmp; | |
1409 | ||
1410 | if (!retinfo) | |
1411 | return -EFAULT; | |
1412 | ||
1413 | memset(&tmp, 0, sizeof(tmp)); | |
1414 | ||
1415 | tmp.type = PORT_16550A; | |
1416 | tmp.line = mos7720_port->port->serial->minor; | |
1417 | tmp.port = mos7720_port->port->number; | |
1418 | tmp.irq = 0; | |
1419 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
1420 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; | |
1421 | tmp.baud_base = 9600; | |
1422 | tmp.close_delay = 5*HZ; | |
1423 | tmp.closing_wait = 30*HZ; | |
1424 | ||
1425 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1426 | return -EFAULT; | |
1427 | return 0; | |
1428 | } | |
1429 | ||
1430 | static int mos7720_ioctl(struct usb_serial_port *port, struct file *file, | |
1431 | unsigned int cmd, unsigned long arg) | |
1432 | { | |
1433 | struct moschip_port *mos7720_port; | |
1434 | struct async_icount cnow; | |
1435 | struct async_icount cprev; | |
1436 | struct serial_icounter_struct icount; | |
1437 | ||
1438 | mos7720_port = usb_get_serial_port_data(port); | |
1439 | if (mos7720_port == NULL) | |
1440 | return -ENODEV; | |
1441 | ||
1442 | dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd); | |
1443 | ||
1444 | switch (cmd) { | |
1445 | case TIOCINQ: | |
1446 | /* return number of bytes available */ | |
1447 | dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number); | |
1448 | return get_number_bytes_avail(mos7720_port, | |
1449 | (unsigned int __user *)arg); | |
1450 | break; | |
1451 | ||
1452 | case TIOCSERGETLSR: | |
1453 | dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number); | |
1454 | return get_lsr_info(mos7720_port, (unsigned int __user *)arg); | |
1455 | return 0; | |
1456 | ||
1457 | case TIOCMBIS: | |
1458 | case TIOCMBIC: | |
1459 | case TIOCMSET: | |
1460 | dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__, | |
1461 | port->number); | |
1462 | return set_modem_info(mos7720_port, cmd, | |
1463 | (unsigned int __user *)arg); | |
1464 | ||
1465 | case TIOCMGET: | |
1466 | dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number); | |
1467 | return get_modem_info(mos7720_port, | |
1468 | (unsigned int __user *)arg); | |
1469 | ||
1470 | case TIOCGSERIAL: | |
1471 | dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number); | |
1472 | return get_serial_info(mos7720_port, | |
1473 | (struct serial_struct __user *)arg); | |
1474 | ||
1475 | case TIOCSSERIAL: | |
1476 | dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number); | |
1477 | break; | |
1478 | ||
1479 | case TIOCMIWAIT: | |
1480 | dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); | |
1481 | cprev = mos7720_port->icount; | |
1482 | while (1) { | |
1483 | if (signal_pending(current)) | |
1484 | return -ERESTARTSYS; | |
1485 | cnow = mos7720_port->icount; | |
1486 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
1487 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
1488 | return -EIO; /* no change => error */ | |
1489 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
1490 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
1491 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
1492 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { | |
1493 | return 0; | |
1494 | } | |
1495 | cprev = cnow; | |
1496 | } | |
1497 | /* NOTREACHED */ | |
1498 | break; | |
1499 | ||
1500 | case TIOCGICOUNT: | |
1501 | cnow = mos7720_port->icount; | |
1502 | icount.cts = cnow.cts; | |
1503 | icount.dsr = cnow.dsr; | |
1504 | icount.rng = cnow.rng; | |
1505 | icount.dcd = cnow.dcd; | |
1506 | icount.rx = cnow.rx; | |
1507 | icount.tx = cnow.tx; | |
1508 | icount.frame = cnow.frame; | |
1509 | icount.overrun = cnow.overrun; | |
1510 | icount.parity = cnow.parity; | |
1511 | icount.brk = cnow.brk; | |
1512 | icount.buf_overrun = cnow.buf_overrun; | |
1513 | ||
1514 | dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, | |
1515 | port->number, icount.rx, icount.tx ); | |
1516 | if (copy_to_user((void __user *)arg, &icount, sizeof(icount))) | |
1517 | return -EFAULT; | |
1518 | return 0; | |
1519 | } | |
1520 | ||
1521 | return -ENOIOCTLCMD; | |
1522 | } | |
1523 | ||
1524 | static int mos7720_startup(struct usb_serial *serial) | |
1525 | { | |
1526 | struct moschip_serial *mos7720_serial; | |
1527 | struct moschip_port *mos7720_port; | |
1528 | struct usb_device *dev; | |
1529 | int i; | |
1530 | char data; | |
1531 | ||
1532 | dbg("%s: Entering ..........", __FUNCTION__); | |
1533 | ||
1534 | if (!serial) { | |
1535 | dbg("Invalid Handler"); | |
1536 | return -ENODEV; | |
1537 | } | |
1538 | ||
1539 | dev = serial->dev; | |
1540 | ||
1541 | /* create our private serial structure */ | |
1542 | mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL); | |
1543 | if (mos7720_serial == NULL) { | |
1544 | err("%s - Out of memory", __FUNCTION__); | |
1545 | return -ENOMEM; | |
1546 | } | |
1547 | ||
1548 | usb_set_serial_data(serial, mos7720_serial); | |
1549 | ||
1550 | /* we set up the pointers to the endpoints in the mos7720_open * | |
1551 | * function, as the structures aren't created yet. */ | |
1552 | ||
1553 | /* set up port private structures */ | |
1554 | for (i = 0; i < serial->num_ports; ++i) { | |
1555 | mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); | |
1556 | if (mos7720_port == NULL) { | |
1557 | err("%s - Out of memory", __FUNCTION__); | |
1558 | usb_set_serial_data(serial, NULL); | |
1559 | kfree(mos7720_serial); | |
1560 | return -ENOMEM; | |
1561 | } | |
1562 | ||
1563 | /* Initialize all port interrupt end point to port 0 int | |
1564 | * endpoint. Our device has only one interrupt endpoint | |
1565 | * comman to all ports */ | |
1566 | serial->port[i]->interrupt_in_endpointAddress = serial->port[0]->interrupt_in_endpointAddress; | |
1567 | ||
1568 | mos7720_port->port = serial->port[i]; | |
1569 | usb_set_serial_port_data(serial->port[i], mos7720_port); | |
1570 | ||
1571 | dbg("port number is %d", serial->port[i]->number); | |
1572 | dbg("serial number is %d", serial->minor); | |
1573 | } | |
1574 | ||
1575 | ||
1576 | /* setting configuration feature to one */ | |
1577 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
1578 | (__u8)0x03, 0x00,0x01,0x00, NULL, 0x00, 5*HZ); | |
1579 | ||
1580 | send_mos_cmd(serial,MOS_READ,0x00, UART_LSR, &data); // LSR For Port 1 | |
1581 | dbg("LSR:%x",data); | |
1582 | ||
1583 | send_mos_cmd(serial,MOS_READ,0x01, UART_LSR, &data); // LSR For Port 2 | |
1584 | dbg("LSR:%x",data); | |
1585 | ||
1586 | return 0; | |
1587 | } | |
1588 | ||
1589 | static void mos7720_shutdown(struct usb_serial *serial) | |
1590 | { | |
1591 | int i; | |
1592 | ||
1593 | /* free private structure allocated for serial port */ | |
1594 | for (i=0; i < serial->num_ports; ++i) { | |
1595 | kfree(usb_get_serial_port_data(serial->port[i])); | |
1596 | usb_set_serial_port_data(serial->port[i], NULL); | |
1597 | } | |
1598 | ||
1599 | /* free private structure allocated for serial device */ | |
1600 | kfree(usb_get_serial_data(serial)); | |
1601 | usb_set_serial_data(serial, NULL); | |
1602 | } | |
1603 | ||
d9b1b787 JH |
1604 | static struct usb_driver usb_driver = { |
1605 | .name = "moschip7720", | |
1606 | .probe = usb_serial_probe, | |
1607 | .disconnect = usb_serial_disconnect, | |
1608 | .id_table = moschip_port_id_table, | |
1609 | .no_dynamic_id = 1, | |
1610 | }; | |
1611 | ||
0f64478c GKH |
1612 | static struct usb_serial_driver moschip7720_2port_driver = { |
1613 | .driver = { | |
1614 | .owner = THIS_MODULE, | |
1615 | .name = "moschip7720", | |
1616 | }, | |
1617 | .description = "Moschip 2 port adapter", | |
d9b1b787 | 1618 | .usb_driver = &usb_driver, |
0f64478c GKH |
1619 | .id_table = moschip_port_id_table, |
1620 | .num_interrupt_in = 1, | |
1621 | .num_bulk_in = 2, | |
1622 | .num_bulk_out = 2, | |
1623 | .num_ports = 2, | |
1624 | .open = mos7720_open, | |
1625 | .close = mos7720_close, | |
1626 | .throttle = mos7720_throttle, | |
1627 | .unthrottle = mos7720_unthrottle, | |
1628 | .attach = mos7720_startup, | |
1629 | .shutdown = mos7720_shutdown, | |
1630 | .ioctl = mos7720_ioctl, | |
1631 | .set_termios = mos7720_set_termios, | |
1632 | .write = mos7720_write, | |
1633 | .write_room = mos7720_write_room, | |
1634 | .chars_in_buffer = mos7720_chars_in_buffer, | |
1635 | .break_ctl = mos7720_break, | |
1636 | .read_bulk_callback = mos7720_bulk_in_callback, | |
e8e30c76 | 1637 | .read_int_callback = mos7720_interrupt_callback, |
0f64478c GKH |
1638 | }; |
1639 | ||
0f64478c GKH |
1640 | static int __init moschip7720_init(void) |
1641 | { | |
1642 | int retval; | |
1643 | ||
1644 | dbg("%s: Entering ..........", __FUNCTION__); | |
1645 | ||
1646 | /* Register with the usb serial */ | |
1647 | retval = usb_serial_register(&moschip7720_2port_driver); | |
1648 | if (retval) | |
1649 | goto failed_port_device_register; | |
1650 | ||
1651 | info(DRIVER_DESC " " DRIVER_VERSION); | |
1652 | ||
1653 | /* Register with the usb */ | |
1654 | retval = usb_register(&usb_driver); | |
1655 | if (retval) | |
1656 | goto failed_usb_register; | |
1657 | ||
1658 | return 0; | |
1659 | ||
1660 | failed_usb_register: | |
1661 | usb_serial_deregister(&moschip7720_2port_driver); | |
1662 | ||
1663 | failed_port_device_register: | |
1664 | return retval; | |
1665 | } | |
1666 | ||
1667 | static void __exit moschip7720_exit(void) | |
1668 | { | |
1669 | usb_deregister(&usb_driver); | |
1670 | usb_serial_deregister(&moschip7720_2port_driver); | |
1671 | } | |
1672 | ||
1673 | module_init(moschip7720_init); | |
1674 | module_exit(moschip7720_exit); | |
1675 | ||
1676 | /* Module information */ | |
1677 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1678 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1679 | MODULE_LICENSE("GPL"); | |
1680 | ||
1681 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1682 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |