Commit | Line | Data |
---|---|---|
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: | |
50d2dc72 GKH |
12 | * Vijaya Kumar <vijaykumar.gn@gmail.com> |
13 | * Ajay Kumar <naanuajay@yahoo.com> | |
14 | * Gurudeva <ngurudeva@yahoo.com> | |
0f64478c GKH |
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; | |
81105984 | 106 | int status = urb->status; |
325b70c2 | 107 | __u8 *data; |
0f64478c GKH |
108 | __u8 sp1; |
109 | __u8 sp2; | |
0f64478c GKH |
110 | |
111 | dbg("%s"," : Entering\n"); | |
112 | ||
81105984 | 113 | switch (status) { |
0f64478c GKH |
114 | case 0: |
115 | /* success */ | |
116 | break; | |
117 | case -ECONNRESET: | |
118 | case -ENOENT: | |
119 | case -ESHUTDOWN: | |
120 | /* this urb is terminated, clean up */ | |
121 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, | |
81105984 | 122 | status); |
0f64478c GKH |
123 | return; |
124 | default: | |
125 | dbg("%s - nonzero urb status received: %d", __FUNCTION__, | |
81105984 | 126 | status); |
0f64478c GKH |
127 | goto exit; |
128 | } | |
129 | ||
130 | length = urb->actual_length; | |
131 | data = urb->transfer_buffer; | |
132 | ||
133 | /* Moschip get 4 bytes | |
134 | * Byte 1 IIR Port 1 (port.number is 0) | |
135 | * Byte 2 IIR Port 2 (port.number is 1) | |
136 | * Byte 3 -------------- | |
137 | * Byte 4 FIFO status for both */ | |
325b70c2 ON |
138 | |
139 | /* the above description is inverted | |
140 | * oneukum 2007-03-14 */ | |
141 | ||
142 | if (unlikely(length != 4)) { | |
0f64478c GKH |
143 | dbg("Wrong data !!!"); |
144 | return; | |
145 | } | |
146 | ||
325b70c2 ON |
147 | sp1 = data[3]; |
148 | sp2 = data[2]; | |
0f64478c | 149 | |
325b70c2 | 150 | if ((sp1 | sp2) & 0x01) { |
0f64478c GKH |
151 | /* No Interrupt Pending in both the ports */ |
152 | dbg("No Interrupt !!!"); | |
153 | } else { | |
154 | switch (sp1 & 0x0f) { | |
155 | case SERIAL_IIR_RLS: | |
156 | dbg("Serial Port 1: Receiver status error or address " | |
157 | "bit detected in 9-bit mode\n"); | |
158 | break; | |
159 | case SERIAL_IIR_CTI: | |
160 | dbg("Serial Port 1: Receiver time out"); | |
161 | break; | |
162 | case SERIAL_IIR_MS: | |
163 | dbg("Serial Port 1: Modem status change"); | |
164 | break; | |
165 | } | |
166 | ||
167 | switch (sp2 & 0x0f) { | |
168 | case SERIAL_IIR_RLS: | |
169 | dbg("Serial Port 2: Receiver status error or address " | |
170 | "bit detected in 9-bit mode"); | |
171 | break; | |
172 | case SERIAL_IIR_CTI: | |
173 | dbg("Serial Port 2: Receiver time out"); | |
174 | break; | |
175 | case SERIAL_IIR_MS: | |
176 | dbg("Serial Port 2: Modem status change"); | |
177 | break; | |
178 | } | |
179 | } | |
180 | ||
181 | exit: | |
182 | result = usb_submit_urb(urb, GFP_ATOMIC); | |
183 | if (result) | |
184 | dev_err(&urb->dev->dev, | |
185 | "%s - Error %d submitting control urb\n", | |
186 | __FUNCTION__, result); | |
187 | return; | |
188 | } | |
189 | ||
190 | /* | |
191 | * mos7720_bulk_in_callback | |
192 | * this is the callback function for when we have received data on the | |
193 | * bulk in endpoint. | |
194 | */ | |
195 | static void mos7720_bulk_in_callback(struct urb *urb) | |
196 | { | |
81105984 | 197 | int retval; |
0f64478c GKH |
198 | unsigned char *data ; |
199 | struct usb_serial_port *port; | |
200 | struct moschip_port *mos7720_port; | |
201 | struct tty_struct *tty; | |
81105984 | 202 | int status = urb->status; |
0f64478c | 203 | |
81105984 GKH |
204 | if (status) { |
205 | dbg("nonzero read bulk status received: %d", status); | |
0f64478c GKH |
206 | return; |
207 | } | |
208 | ||
209 | mos7720_port = urb->context; | |
210 | if (!mos7720_port) { | |
211 | dbg("%s","NULL mos7720_port pointer \n"); | |
212 | return ; | |
213 | } | |
214 | ||
215 | port = mos7720_port->port; | |
216 | ||
217 | dbg("Entering...%s", __FUNCTION__); | |
218 | ||
219 | data = urb->transfer_buffer; | |
220 | ||
221 | tty = port->tty; | |
222 | if (tty && urb->actual_length) { | |
223 | tty_buffer_request_room(tty, urb->actual_length); | |
224 | tty_insert_flip_string(tty, data, urb->actual_length); | |
225 | tty_flip_buffer_push(tty); | |
226 | } | |
227 | ||
228 | if (!port->read_urb) { | |
229 | dbg("URB KILLED !!!"); | |
230 | return; | |
231 | } | |
232 | ||
233 | if (port->read_urb->status != -EINPROGRESS) { | |
234 | port->read_urb->dev = port->serial->dev; | |
235 | ||
81105984 GKH |
236 | retval = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
237 | if (retval) | |
238 | dbg("usb_submit_urb(read bulk) failed, retval = %d", | |
239 | retval); | |
0f64478c GKH |
240 | } |
241 | } | |
242 | ||
243 | /* | |
244 | * mos7720_bulk_out_data_callback | |
245 | * this is the callback function for when we have finished sending serial | |
246 | * data on the bulk out endpoint. | |
247 | */ | |
248 | static void mos7720_bulk_out_data_callback(struct urb *urb) | |
249 | { | |
250 | struct moschip_port *mos7720_port; | |
251 | struct tty_struct *tty; | |
81105984 | 252 | int status = urb->status; |
0f64478c | 253 | |
81105984 GKH |
254 | if (status) { |
255 | dbg("nonzero write bulk status received:%d", status); | |
0f64478c GKH |
256 | return; |
257 | } | |
258 | ||
259 | mos7720_port = urb->context; | |
260 | if (!mos7720_port) { | |
261 | dbg("NULL mos7720_port pointer"); | |
262 | return ; | |
263 | } | |
264 | ||
265 | dbg("Entering ........."); | |
266 | ||
267 | tty = mos7720_port->port->tty; | |
268 | ||
b963a844 JS |
269 | if (tty && mos7720_port->open) |
270 | tty_wakeup(tty); | |
0f64478c GKH |
271 | } |
272 | ||
273 | /* | |
274 | * send_mos_cmd | |
275 | * this function will be used for sending command to device | |
276 | */ | |
277 | static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value, | |
278 | __u16 index, void *data) | |
279 | { | |
280 | int status; | |
281 | unsigned int pipe; | |
282 | u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); | |
283 | __u8 requesttype; | |
284 | __u16 size = 0x0000; | |
285 | ||
286 | if (value < MOS_MAX_PORT) { | |
287 | if (product == MOSCHIP_DEVICE_ID_7715) { | |
288 | value = value*0x100+0x100; | |
289 | } else { | |
290 | value = value*0x100+0x200; | |
291 | } | |
292 | } else { | |
293 | value = 0x0000; | |
294 | if ((product == MOSCHIP_DEVICE_ID_7715) && | |
295 | (index != 0x08)) { | |
296 | dbg("serial->product== MOSCHIP_DEVICE_ID_7715"); | |
297 | //index = 0x01 ; | |
298 | } | |
299 | } | |
300 | ||
301 | if (request == MOS_WRITE) { | |
302 | request = (__u8)MOS_WRITE; | |
303 | requesttype = (__u8)0x40; | |
304 | value = value + (__u16)*((unsigned char *)data); | |
305 | data = NULL; | |
306 | pipe = usb_sndctrlpipe(serial->dev, 0); | |
307 | } else { | |
308 | request = (__u8)MOS_READ; | |
309 | requesttype = (__u8)0xC0; | |
310 | size = 0x01; | |
311 | pipe = usb_rcvctrlpipe(serial->dev,0); | |
312 | } | |
313 | ||
314 | status = usb_control_msg(serial->dev, pipe, request, requesttype, | |
315 | value, index, data, size, MOS_WDR_TIMEOUT); | |
316 | ||
317 | if (status < 0) | |
318 | dbg("Command Write failed Value %x index %x\n",value,index); | |
319 | ||
320 | return status; | |
321 | } | |
322 | ||
323 | static int mos7720_open(struct usb_serial_port *port, struct file * filp) | |
324 | { | |
325 | struct usb_serial *serial; | |
326 | struct usb_serial_port *port0; | |
327 | struct urb *urb; | |
328 | struct moschip_serial *mos7720_serial; | |
329 | struct moschip_port *mos7720_port; | |
330 | int response; | |
331 | int port_number; | |
332 | char data; | |
fe4b65ec | 333 | int allocated_urbs = 0; |
0f64478c GKH |
334 | int j; |
335 | ||
336 | serial = port->serial; | |
337 | ||
338 | mos7720_port = usb_get_serial_port_data(port); | |
339 | if (mos7720_port == NULL) | |
340 | return -ENODEV; | |
341 | ||
342 | port0 = serial->port[0]; | |
343 | ||
344 | mos7720_serial = usb_get_serial_data(serial); | |
345 | ||
346 | if (mos7720_serial == NULL || port0 == NULL) | |
347 | return -ENODEV; | |
348 | ||
349 | usb_clear_halt(serial->dev, port->write_urb->pipe); | |
350 | usb_clear_halt(serial->dev, port->read_urb->pipe); | |
351 | ||
352 | /* Initialising the write urb pool */ | |
353 | for (j = 0; j < NUM_URBS; ++j) { | |
c2cf3f6e | 354 | urb = usb_alloc_urb(0,GFP_KERNEL); |
0f64478c GKH |
355 | mos7720_port->write_urb_pool[j] = urb; |
356 | ||
357 | if (urb == NULL) { | |
358 | err("No more urbs???"); | |
359 | continue; | |
360 | } | |
361 | ||
362 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
363 | GFP_KERNEL); | |
364 | if (!urb->transfer_buffer) { | |
365 | err("%s-out of memory for urb buffers.", __FUNCTION__); | |
fe4b65ec ON |
366 | usb_free_urb(mos7720_port->write_urb_pool[j]); |
367 | mos7720_port->write_urb_pool[j] = NULL; | |
0f64478c GKH |
368 | continue; |
369 | } | |
fe4b65ec | 370 | allocated_urbs++; |
0f64478c GKH |
371 | } |
372 | ||
fe4b65ec ON |
373 | if (!allocated_urbs) |
374 | return -ENOMEM; | |
375 | ||
0f64478c GKH |
376 | /* Initialize MCS7720 -- Write Init values to corresponding Registers |
377 | * | |
378 | * Register Index | |
379 | * 1 : IER | |
380 | * 2 : FCR | |
381 | * 3 : LCR | |
382 | * 4 : MCR | |
383 | * | |
384 | * 0x08 : SP1/2 Control Reg | |
385 | */ | |
386 | port_number = port->number - port->serial->minor; | |
387 | send_mos_cmd(port->serial, MOS_READ, port_number, UART_LSR, &data); | |
388 | dbg("SS::%p LSR:%x\n",mos7720_port, data); | |
389 | ||
390 | dbg("Check:Sending Command .........."); | |
391 | ||
392 | data = 0x02; | |
393 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x01, &data); | |
394 | data = 0x02; | |
395 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x02, &data); | |
396 | ||
397 | data = 0x00; | |
398 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
399 | data = 0x00; | |
400 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data); | |
401 | ||
402 | data = 0xCF; | |
403 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data); | |
404 | data = 0x03; | |
405 | mos7720_port->shadowLCR = data; | |
406 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
407 | data = 0x0b; | |
408 | mos7720_port->shadowMCR = data; | |
409 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
410 | data = 0x0b; | |
411 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
412 | ||
413 | data = 0x00; | |
414 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); | |
415 | data = 0x00; | |
416 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); | |
417 | ||
418 | /* data = 0x00; | |
419 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, port_number + 1, &data); | |
420 | data = 0x03; | |
421 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data); | |
422 | data = 0x00; | |
423 | send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data); | |
424 | */ | |
425 | data = 0x00; | |
426 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); | |
427 | ||
428 | data = data | (port->number - port->serial->minor + 1); | |
429 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); | |
430 | ||
431 | data = 0x83; | |
432 | mos7720_port->shadowLCR = data; | |
433 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
434 | data = 0x0c; | |
435 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data); | |
436 | data = 0x00; | |
437 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
438 | data = 0x03; | |
439 | mos7720_port->shadowLCR = data; | |
440 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
441 | data = 0x0c; | |
442 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
443 | data = 0x0c; | |
444 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
445 | ||
446 | //Matrix | |
447 | ||
448 | /* force low_latency on so that our tty_push actually forces * | |
449 | * the data through,otherwise it is scheduled, and with * | |
450 | * high data rates (like with OHCI) data can get lost. */ | |
451 | ||
452 | if (port->tty) | |
453 | port->tty->low_latency = 1; | |
454 | ||
455 | /* see if we've set up our endpoint info yet * | |
456 | * (can't set it up in mos7720_startup as the * | |
457 | * structures were not set up at that time.) */ | |
458 | if (!mos7720_serial->interrupt_started) { | |
459 | dbg("Interrupt buffer NULL !!!"); | |
460 | ||
461 | /* not set up yet, so do it now */ | |
462 | mos7720_serial->interrupt_started = 1; | |
463 | ||
464 | dbg("To Submit URB !!!"); | |
465 | ||
466 | /* set up our interrupt urb */ | |
467 | usb_fill_int_urb(port0->interrupt_in_urb, serial->dev, | |
468 | usb_rcvintpipe(serial->dev, | |
469 | port->interrupt_in_endpointAddress), | |
470 | port0->interrupt_in_buffer, | |
471 | port0->interrupt_in_urb->transfer_buffer_length, | |
472 | mos7720_interrupt_callback, mos7720_port, | |
473 | port0->interrupt_in_urb->interval); | |
474 | ||
475 | /* start interrupt read for this mos7720 this interrupt * | |
476 | * will continue as long as the mos7720 is connected */ | |
477 | dbg("Submit URB over !!!"); | |
478 | response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL); | |
479 | if (response) | |
480 | dev_err(&port->dev, | |
898eb71c | 481 | "%s - Error %d submitting control urb\n", |
0f64478c GKH |
482 | __FUNCTION__, response); |
483 | } | |
484 | ||
485 | /* set up our bulk in urb */ | |
486 | usb_fill_bulk_urb(port->read_urb, serial->dev, | |
487 | usb_rcvbulkpipe(serial->dev, | |
488 | port->bulk_in_endpointAddress), | |
489 | port->bulk_in_buffer, | |
490 | port->read_urb->transfer_buffer_length, | |
491 | mos7720_bulk_in_callback, mos7720_port); | |
492 | response = usb_submit_urb(port->read_urb, GFP_KERNEL); | |
493 | if (response) | |
494 | dev_err(&port->dev, | |
898eb71c | 495 | "%s - Error %d submitting read urb\n", __FUNCTION__, response); |
0f64478c GKH |
496 | |
497 | /* initialize our icount structure */ | |
498 | memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount)); | |
499 | ||
500 | /* initialize our port settings */ | |
501 | mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */ | |
502 | ||
503 | /* send a open port command */ | |
504 | mos7720_port->open = 1; | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | /* | |
510 | * mos7720_chars_in_buffer | |
511 | * this function is called by the tty driver when it wants to know how many | |
512 | * bytes of data we currently have outstanding in the port (data that has | |
513 | * been written, but hasn't made it out the port yet) | |
514 | * If successful, we return the number of bytes left to be written in the | |
515 | * system, | |
516 | * Otherwise we return a negative error number. | |
517 | */ | |
518 | static int mos7720_chars_in_buffer(struct usb_serial_port *port) | |
519 | { | |
520 | int i; | |
521 | int chars = 0; | |
522 | struct moschip_port *mos7720_port; | |
523 | ||
524 | dbg("%s:entering ...........", __FUNCTION__); | |
525 | ||
526 | mos7720_port = usb_get_serial_port_data(port); | |
527 | if (mos7720_port == NULL) { | |
528 | dbg("%s:leaving ...........", __FUNCTION__); | |
529 | return -ENODEV; | |
530 | } | |
531 | ||
532 | for (i = 0; i < NUM_URBS; ++i) { | |
fe4b65ec | 533 | if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status == -EINPROGRESS) |
0f64478c GKH |
534 | chars += URB_TRANSFER_BUFFER_SIZE; |
535 | } | |
536 | dbg("%s - returns %d", __FUNCTION__, chars); | |
537 | return chars; | |
538 | } | |
539 | ||
540 | static void mos7720_close(struct usb_serial_port *port, struct file *filp) | |
541 | { | |
542 | struct usb_serial *serial; | |
543 | struct moschip_port *mos7720_port; | |
544 | char data; | |
545 | int j; | |
546 | ||
547 | dbg("mos7720_close:entering..."); | |
548 | ||
549 | serial = port->serial; | |
550 | ||
551 | mos7720_port = usb_get_serial_port_data(port); | |
552 | if (mos7720_port == NULL) | |
553 | return; | |
554 | ||
555 | for (j = 0; j < NUM_URBS; ++j) | |
556 | usb_kill_urb(mos7720_port->write_urb_pool[j]); | |
557 | ||
558 | /* Freeing Write URBs */ | |
559 | for (j = 0; j < NUM_URBS; ++j) { | |
560 | if (mos7720_port->write_urb_pool[j]) { | |
561 | kfree(mos7720_port->write_urb_pool[j]->transfer_buffer); | |
562 | usb_free_urb(mos7720_port->write_urb_pool[j]); | |
563 | } | |
564 | } | |
565 | ||
566 | /* While closing port, shutdown all bulk read, write * | |
a1cd7e99 ON |
567 | * and interrupt read if they exists, otherwise nop */ |
568 | dbg("Shutdown bulk write"); | |
569 | usb_kill_urb(port->write_urb); | |
570 | dbg("Shutdown bulk read"); | |
571 | usb_kill_urb(port->read_urb); | |
572 | ||
573 | mutex_lock(&serial->disc_mutex); | |
574 | /* these commands must not be issued if the device has | |
575 | * been disconnected */ | |
576 | if (!serial->disconnected) { | |
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); | |
0f64478c | 584 | } |
a1cd7e99 | 585 | mutex_unlock(&serial->disc_mutex); |
0f64478c GKH |
586 | mos7720_port->open = 0; |
587 | ||
588 | dbg("Leaving %s", __FUNCTION__); | |
589 | } | |
590 | ||
591 | static void mos7720_break(struct usb_serial_port *port, int break_state) | |
592 | { | |
593 | unsigned char data; | |
594 | struct usb_serial *serial; | |
595 | struct moschip_port *mos7720_port; | |
596 | ||
597 | dbg("Entering %s", __FUNCTION__); | |
598 | ||
599 | serial = port->serial; | |
600 | ||
601 | mos7720_port = usb_get_serial_port_data(port); | |
602 | if (mos7720_port == NULL) | |
603 | return; | |
604 | ||
605 | if (break_state == -1) | |
606 | data = mos7720_port->shadowLCR | UART_LCR_SBC; | |
607 | else | |
608 | data = mos7720_port->shadowLCR & ~UART_LCR_SBC; | |
609 | ||
610 | mos7720_port->shadowLCR = data; | |
611 | send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor, | |
612 | 0x03, &data); | |
613 | ||
614 | return; | |
615 | } | |
616 | ||
617 | /* | |
618 | * mos7720_write_room | |
619 | * this function is called by the tty driver when it wants to know how many | |
620 | * bytes of data we can accept for a specific port. | |
621 | * If successful, we return the amount of room that we have for this port | |
622 | * Otherwise we return a negative error number. | |
623 | */ | |
624 | static int mos7720_write_room(struct usb_serial_port *port) | |
625 | { | |
626 | struct moschip_port *mos7720_port; | |
627 | int room = 0; | |
628 | int i; | |
629 | ||
630 | dbg("%s:entering ...........", __FUNCTION__); | |
631 | ||
632 | mos7720_port = usb_get_serial_port_data(port); | |
633 | if (mos7720_port == NULL) { | |
634 | dbg("%s:leaving ...........", __FUNCTION__); | |
635 | return -ENODEV; | |
636 | } | |
637 | ||
638 | for (i = 0; i < NUM_URBS; ++i) { | |
fe4b65ec | 639 | if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) |
0f64478c GKH |
640 | room += URB_TRANSFER_BUFFER_SIZE; |
641 | } | |
642 | ||
643 | dbg("%s - returns %d", __FUNCTION__, room); | |
644 | return room; | |
645 | } | |
646 | ||
647 | static int mos7720_write(struct usb_serial_port *port, | |
648 | const unsigned char *data, int count) | |
649 | { | |
650 | int status; | |
651 | int i; | |
652 | int bytes_sent = 0; | |
653 | int transfer_size; | |
654 | ||
655 | struct moschip_port *mos7720_port; | |
656 | struct usb_serial *serial; | |
657 | struct urb *urb; | |
658 | const unsigned char *current_position = data; | |
659 | ||
660 | dbg("%s:entering ...........", __FUNCTION__); | |
661 | ||
662 | serial = port->serial; | |
663 | ||
664 | mos7720_port = usb_get_serial_port_data(port); | |
665 | if (mos7720_port == NULL) { | |
666 | dbg("mos7720_port is NULL"); | |
667 | return -ENODEV; | |
668 | } | |
669 | ||
670 | /* try to find a free urb in the list */ | |
671 | urb = NULL; | |
672 | ||
673 | for (i = 0; i < NUM_URBS; ++i) { | |
fe4b65ec | 674 | if (mos7720_port->write_urb_pool[i] && mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) { |
0f64478c GKH |
675 | urb = mos7720_port->write_urb_pool[i]; |
676 | dbg("URB:%d",i); | |
677 | break; | |
678 | } | |
679 | } | |
680 | ||
681 | if (urb == NULL) { | |
682 | dbg("%s - no more free urbs", __FUNCTION__); | |
683 | goto exit; | |
684 | } | |
685 | ||
686 | if (urb->transfer_buffer == NULL) { | |
687 | urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, | |
688 | GFP_KERNEL); | |
689 | if (urb->transfer_buffer == NULL) { | |
690 | err("%s no more kernel memory...", __FUNCTION__); | |
691 | goto exit; | |
692 | } | |
693 | } | |
694 | transfer_size = min (count, URB_TRANSFER_BUFFER_SIZE); | |
695 | ||
696 | memcpy(urb->transfer_buffer, current_position, transfer_size); | |
697 | usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size, | |
698 | urb->transfer_buffer); | |
699 | ||
700 | /* fill urb with data and submit */ | |
701 | usb_fill_bulk_urb(urb, serial->dev, | |
702 | usb_sndbulkpipe(serial->dev, | |
703 | port->bulk_out_endpointAddress), | |
704 | urb->transfer_buffer, transfer_size, | |
705 | mos7720_bulk_out_data_callback, mos7720_port); | |
706 | ||
707 | /* send it down the pipe */ | |
708 | status = usb_submit_urb(urb,GFP_ATOMIC); | |
709 | if (status) { | |
710 | err("%s - usb_submit_urb(write bulk) failed with status = %d", | |
711 | __FUNCTION__, status); | |
712 | bytes_sent = status; | |
713 | goto exit; | |
714 | } | |
715 | bytes_sent = transfer_size; | |
716 | ||
717 | exit: | |
718 | return bytes_sent; | |
719 | } | |
720 | ||
721 | static void mos7720_throttle(struct usb_serial_port *port) | |
722 | { | |
723 | struct moschip_port *mos7720_port; | |
724 | struct tty_struct *tty; | |
725 | int status; | |
726 | ||
727 | dbg("%s- port %d\n", __FUNCTION__, port->number); | |
728 | ||
729 | mos7720_port = usb_get_serial_port_data(port); | |
730 | ||
731 | if (mos7720_port == NULL) | |
732 | return; | |
733 | ||
734 | if (!mos7720_port->open) { | |
735 | dbg("port not opened"); | |
736 | return; | |
737 | } | |
738 | ||
739 | dbg("%s: Entering ..........", __FUNCTION__); | |
740 | ||
741 | tty = port->tty; | |
742 | if (!tty) { | |
743 | dbg("%s - no tty available", __FUNCTION__); | |
744 | return; | |
745 | } | |
746 | ||
747 | /* if we are implementing XON/XOFF, send the stop character */ | |
748 | if (I_IXOFF(tty)) { | |
749 | unsigned char stop_char = STOP_CHAR(tty); | |
750 | status = mos7720_write(port, &stop_char, 1); | |
751 | if (status <= 0) | |
752 | return; | |
753 | } | |
754 | ||
755 | /* if we are implementing RTS/CTS, toggle that line */ | |
756 | if (tty->termios->c_cflag & CRTSCTS) { | |
757 | mos7720_port->shadowMCR &= ~UART_MCR_RTS; | |
758 | status = send_mos_cmd(port->serial, MOS_WRITE, | |
759 | port->number - port->serial->minor, | |
760 | UART_MCR, &mos7720_port->shadowMCR); | |
761 | if (status != 0) | |
762 | return; | |
763 | } | |
764 | } | |
765 | ||
766 | static void mos7720_unthrottle(struct usb_serial_port *port) | |
767 | { | |
768 | struct tty_struct *tty; | |
769 | int status; | |
770 | struct moschip_port *mos7720_port = usb_get_serial_port_data(port); | |
771 | ||
772 | if (mos7720_port == NULL) | |
773 | return; | |
774 | ||
775 | if (!mos7720_port->open) { | |
776 | dbg("%s - port not opened", __FUNCTION__); | |
777 | return; | |
778 | } | |
779 | ||
780 | dbg("%s: Entering ..........", __FUNCTION__); | |
781 | ||
782 | tty = port->tty; | |
783 | if (!tty) { | |
784 | dbg("%s - no tty available", __FUNCTION__); | |
785 | return; | |
786 | } | |
787 | ||
788 | /* if we are implementing XON/XOFF, send the start character */ | |
789 | if (I_IXOFF(tty)) { | |
790 | unsigned char start_char = START_CHAR(tty); | |
791 | status = mos7720_write(port, &start_char, 1); | |
792 | if (status <= 0) | |
793 | return; | |
794 | } | |
795 | ||
796 | /* if we are implementing RTS/CTS, toggle that line */ | |
797 | if (tty->termios->c_cflag & CRTSCTS) { | |
798 | mos7720_port->shadowMCR |= UART_MCR_RTS; | |
799 | status = send_mos_cmd(port->serial, MOS_WRITE, | |
800 | port->number - port->serial->minor, | |
801 | UART_MCR, &mos7720_port->shadowMCR); | |
802 | if (status != 0) | |
803 | return; | |
804 | } | |
805 | } | |
806 | ||
807 | static int set_higher_rates(struct moschip_port *mos7720_port, | |
808 | unsigned int baud) | |
809 | { | |
810 | unsigned char data; | |
811 | struct usb_serial_port *port; | |
812 | struct usb_serial *serial; | |
813 | int port_number; | |
814 | ||
815 | if (mos7720_port == NULL) | |
816 | return -EINVAL; | |
817 | ||
818 | port = mos7720_port->port; | |
819 | serial = port->serial; | |
820 | ||
821 | /*********************************************** | |
822 | * Init Sequence for higher rates | |
823 | ***********************************************/ | |
824 | dbg("Sending Setting Commands .........."); | |
825 | port_number = port->number - port->serial->minor; | |
826 | ||
827 | data = 0x000; | |
828 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
829 | data = 0x000; | |
830 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data); | |
831 | data = 0x0CF; | |
832 | send_mos_cmd(serial, MOS_WRITE, port->number, 0x02, &data); | |
833 | data = 0x00b; | |
834 | mos7720_port->shadowMCR = data; | |
835 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
836 | data = 0x00b; | |
837 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
838 | ||
839 | data = 0x000; | |
840 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); | |
841 | data = 0x000; | |
842 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); | |
843 | ||
844 | ||
845 | /*********************************************** | |
846 | * Set for higher rates * | |
847 | ***********************************************/ | |
848 | ||
849 | data = baud * 0x10; | |
850 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1,&data); | |
851 | ||
852 | data = 0x003; | |
853 | send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data); | |
854 | data = 0x003; | |
855 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data); | |
856 | ||
857 | data = 0x02b; | |
858 | mos7720_port->shadowMCR = data; | |
859 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
860 | data = 0x02b; | |
861 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
862 | ||
863 | /*********************************************** | |
864 | * Set DLL/DLM | |
865 | ***********************************************/ | |
866 | ||
867 | data = mos7720_port->shadowLCR | UART_LCR_DLAB; | |
868 | mos7720_port->shadowLCR = data; | |
869 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
870 | ||
871 | data = 0x001; /* DLL */ | |
872 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data); | |
873 | data = 0x000; /* DLM */ | |
874 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data); | |
875 | ||
876 | data = mos7720_port->shadowLCR & ~UART_LCR_DLAB; | |
877 | mos7720_port->shadowLCR = data; | |
878 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data); | |
879 | ||
880 | return 0; | |
881 | } | |
882 | ||
883 | /* baud rate information */ | |
884 | struct divisor_table_entry | |
885 | { | |
886 | __u32 baudrate; | |
887 | __u16 divisor; | |
888 | }; | |
889 | ||
890 | /* Define table of divisors for moschip 7720 hardware * | |
891 | * These assume a 3.6864MHz crystal, the standard /16, and * | |
892 | * MCR.7 = 0. */ | |
893 | static struct divisor_table_entry divisor_table[] = { | |
894 | { 50, 2304}, | |
895 | { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */ | |
896 | { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */ | |
897 | { 150, 768}, | |
898 | { 300, 384}, | |
899 | { 600, 192}, | |
900 | { 1200, 96}, | |
901 | { 1800, 64}, | |
902 | { 2400, 48}, | |
903 | { 4800, 24}, | |
904 | { 7200, 16}, | |
905 | { 9600, 12}, | |
906 | { 19200, 6}, | |
907 | { 38400, 3}, | |
908 | { 57600, 2}, | |
909 | { 115200, 1}, | |
910 | }; | |
911 | ||
912 | /***************************************************************************** | |
913 | * calc_baud_rate_divisor | |
914 | * this function calculates the proper baud rate divisor for the specified | |
915 | * baud rate. | |
916 | *****************************************************************************/ | |
917 | static int calc_baud_rate_divisor(int baudrate, int *divisor) | |
918 | { | |
919 | int i; | |
920 | __u16 custom; | |
921 | __u16 round1; | |
922 | __u16 round; | |
923 | ||
924 | ||
925 | dbg("%s - %d", __FUNCTION__, baudrate); | |
926 | ||
927 | for (i = 0; i < ARRAY_SIZE(divisor_table); i++) { | |
928 | if (divisor_table[i].baudrate == baudrate) { | |
929 | *divisor = divisor_table[i].divisor; | |
930 | return 0; | |
931 | } | |
932 | } | |
933 | ||
934 | /* After trying for all the standard baud rates * | |
935 | * Try calculating the divisor for this baud rate */ | |
936 | if (baudrate > 75 && baudrate < 230400) { | |
937 | /* get the divisor */ | |
938 | custom = (__u16)(230400L / baudrate); | |
939 | ||
940 | /* Check for round off */ | |
941 | round1 = (__u16)(2304000L / baudrate); | |
942 | round = (__u16)(round1 - (custom * 10)); | |
943 | if (round > 4) | |
944 | custom++; | |
945 | *divisor = custom; | |
946 | ||
947 | dbg("Baud %d = %d",baudrate, custom); | |
948 | return 0; | |
949 | } | |
950 | ||
951 | dbg("Baud calculation Failed..."); | |
952 | return -EINVAL; | |
953 | } | |
954 | ||
955 | /* | |
956 | * send_cmd_write_baud_rate | |
957 | * this function sends the proper command to change the baud rate of the | |
958 | * specified port. | |
959 | */ | |
960 | static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port, | |
961 | int baudrate) | |
962 | { | |
963 | struct usb_serial_port *port; | |
964 | struct usb_serial *serial; | |
965 | int divisor; | |
966 | int status; | |
967 | unsigned char data; | |
968 | unsigned char number; | |
969 | ||
970 | if (mos7720_port == NULL) | |
971 | return -1; | |
972 | ||
973 | port = mos7720_port->port; | |
974 | serial = port->serial; | |
975 | ||
976 | dbg("%s: Entering ..........", __FUNCTION__); | |
977 | ||
978 | number = port->number - port->serial->minor; | |
979 | dbg("%s - port = %d, baud = %d", __FUNCTION__, port->number, baudrate); | |
980 | ||
981 | /* Calculate the Divisor */ | |
982 | status = calc_baud_rate_divisor(baudrate, &divisor); | |
983 | if (status) { | |
984 | err("%s - bad baud rate", __FUNCTION__); | |
985 | return status; | |
986 | } | |
987 | ||
988 | /* Enable access to divisor latch */ | |
989 | data = mos7720_port->shadowLCR | UART_LCR_DLAB; | |
990 | mos7720_port->shadowLCR = data; | |
991 | send_mos_cmd(serial, MOS_WRITE, number, UART_LCR, &data); | |
992 | ||
993 | /* Write the divisor */ | |
994 | data = ((unsigned char)(divisor & 0xff)); | |
995 | send_mos_cmd(serial, MOS_WRITE, number, 0x00, &data); | |
996 | ||
997 | data = ((unsigned char)((divisor & 0xff00) >> 8)); | |
998 | send_mos_cmd(serial, MOS_WRITE, number, 0x01, &data); | |
999 | ||
1000 | /* Disable access to divisor latch */ | |
1001 | data = mos7720_port->shadowLCR & ~UART_LCR_DLAB; | |
1002 | mos7720_port->shadowLCR = data; | |
1003 | send_mos_cmd(serial, MOS_WRITE, number, 0x03, &data); | |
1004 | ||
1005 | return status; | |
1006 | } | |
1007 | ||
1008 | /* | |
1009 | * change_port_settings | |
1010 | * This routine is called to set the UART on the device to match | |
1011 | * the specified new settings. | |
1012 | */ | |
1013 | static void change_port_settings(struct moschip_port *mos7720_port, | |
606d099c | 1014 | struct ktermios *old_termios) |
0f64478c GKH |
1015 | { |
1016 | struct usb_serial_port *port; | |
1017 | struct usb_serial *serial; | |
1018 | struct tty_struct *tty; | |
1019 | int baud; | |
1020 | unsigned cflag; | |
1021 | unsigned iflag; | |
1022 | __u8 mask = 0xff; | |
1023 | __u8 lData; | |
1024 | __u8 lParity; | |
1025 | __u8 lStop; | |
1026 | int status; | |
1027 | int port_number; | |
1028 | char data; | |
1029 | ||
1030 | if (mos7720_port == NULL) | |
1031 | return ; | |
1032 | ||
1033 | port = mos7720_port->port; | |
1034 | serial = port->serial; | |
1035 | port_number = port->number - port->serial->minor; | |
1036 | ||
1037 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1038 | ||
1039 | if (!mos7720_port->open) { | |
1040 | dbg("%s - port not opened", __FUNCTION__); | |
1041 | return; | |
1042 | } | |
1043 | ||
1044 | tty = mos7720_port->port->tty; | |
1045 | ||
0f64478c GKH |
1046 | dbg("%s: Entering ..........", __FUNCTION__); |
1047 | ||
1048 | lData = UART_LCR_WLEN8; | |
1049 | lStop = 0x00; /* 1 stop bit */ | |
1050 | lParity = 0x00; /* No parity */ | |
1051 | ||
1052 | cflag = tty->termios->c_cflag; | |
1053 | iflag = tty->termios->c_iflag; | |
1054 | ||
1055 | /* Change the number of bits */ | |
1056 | switch (cflag & CSIZE) { | |
1057 | case CS5: | |
1058 | lData = UART_LCR_WLEN5; | |
1059 | mask = 0x1f; | |
1060 | break; | |
1061 | ||
1062 | case CS6: | |
1063 | lData = UART_LCR_WLEN6; | |
1064 | mask = 0x3f; | |
1065 | break; | |
1066 | ||
1067 | case CS7: | |
1068 | lData = UART_LCR_WLEN7; | |
1069 | mask = 0x7f; | |
1070 | break; | |
1071 | default: | |
1072 | case CS8: | |
1073 | lData = UART_LCR_WLEN8; | |
1074 | break; | |
1075 | } | |
1076 | ||
1077 | /* Change the Parity bit */ | |
1078 | if (cflag & PARENB) { | |
1079 | if (cflag & PARODD) { | |
1080 | lParity = UART_LCR_PARITY; | |
1081 | dbg("%s - parity = odd", __FUNCTION__); | |
1082 | } else { | |
1083 | lParity = (UART_LCR_EPAR | UART_LCR_PARITY); | |
1084 | dbg("%s - parity = even", __FUNCTION__); | |
1085 | } | |
1086 | ||
1087 | } else { | |
1088 | dbg("%s - parity = none", __FUNCTION__); | |
1089 | } | |
1090 | ||
1091 | if (cflag & CMSPAR) | |
1092 | lParity = lParity | 0x20; | |
1093 | ||
1094 | /* Change the Stop bit */ | |
1095 | if (cflag & CSTOPB) { | |
1096 | lStop = UART_LCR_STOP; | |
1097 | dbg("%s - stop bits = 2", __FUNCTION__); | |
1098 | } else { | |
1099 | lStop = 0x00; | |
1100 | dbg("%s - stop bits = 1", __FUNCTION__); | |
1101 | } | |
1102 | ||
1103 | #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ | |
1104 | #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ | |
1105 | #define LCR_PAR_MASK 0x38 /* Mask for parity field */ | |
1106 | ||
1107 | /* Update the LCR with the correct value */ | |
1108 | mos7720_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); | |
1109 | mos7720_port->shadowLCR |= (lData | lParity | lStop); | |
1110 | ||
1111 | ||
1112 | /* Disable Interrupts */ | |
1113 | data = 0x00; | |
1114 | send_mos_cmd(serial,MOS_WRITE,port->number - port->serial->minor, UART_IER, &data); | |
1115 | ||
1116 | data = 0x00; | |
1117 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data); | |
1118 | ||
1119 | data = 0xcf; | |
1120 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data); | |
1121 | ||
1122 | /* Send the updated LCR value to the mos7720 */ | |
1123 | data = mos7720_port->shadowLCR; | |
1124 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_LCR, &data); | |
1125 | ||
1126 | data = 0x00b; | |
1127 | mos7720_port->shadowMCR = data; | |
1128 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
1129 | data = 0x00b; | |
1130 | send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data); | |
1131 | ||
1132 | /* set up the MCR register and send it to the mos7720 */ | |
1133 | mos7720_port->shadowMCR = UART_MCR_OUT2; | |
1134 | if (cflag & CBAUD) | |
1135 | mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS); | |
1136 | ||
1137 | if (cflag & CRTSCTS) { | |
1138 | mos7720_port->shadowMCR |= (UART_MCR_XONANY); | |
1139 | ||
1140 | /* To set hardware flow control to the specified * | |
1141 | * serial port, in SP1/2_CONTROL_REG */ | |
1142 | if (port->number) { | |
1143 | data = 0x001; | |
1144 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, | |
1145 | 0x08, &data); | |
1146 | } else { | |
1147 | data = 0x002; | |
1148 | send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, | |
1149 | 0x08, &data); | |
1150 | } | |
1151 | } else { | |
1152 | mos7720_port->shadowMCR &= ~(UART_MCR_XONANY); | |
1153 | } | |
1154 | ||
1155 | data = mos7720_port->shadowMCR; | |
1156 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_MCR, &data); | |
1157 | ||
1158 | /* Determine divisor based on baud rate */ | |
1159 | baud = tty_get_baud_rate(tty); | |
1160 | if (!baud) { | |
1161 | /* pick a default, any default... */ | |
1162 | dbg("Picked default baud..."); | |
1163 | baud = 9600; | |
1164 | } | |
1165 | ||
1166 | if (baud >= 230400) { | |
1167 | set_higher_rates(mos7720_port, baud); | |
1168 | /* Enable Interrupts */ | |
1169 | data = 0x0c; | |
1170 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data); | |
1171 | return; | |
1172 | } | |
1173 | ||
1174 | dbg("%s - baud rate = %d", __FUNCTION__, baud); | |
1175 | status = send_cmd_write_baud_rate(mos7720_port, baud); | |
65d063ab AC |
1176 | /* FIXME: needs to write actual resulting baud back not just |
1177 | blindly do so */ | |
1178 | if (cflag & CBAUD) | |
1179 | tty_encode_baud_rate(tty, baud, baud); | |
0f64478c GKH |
1180 | /* Enable Interrupts */ |
1181 | data = 0x0c; | |
1182 | send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data); | |
1183 | ||
1184 | if (port->read_urb->status != -EINPROGRESS) { | |
1185 | port->read_urb->dev = serial->dev; | |
1186 | ||
1187 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
1188 | if (status) | |
1189 | dbg("usb_submit_urb(read bulk) failed, status = %d", | |
1190 | status); | |
1191 | } | |
1192 | return; | |
1193 | } | |
1194 | ||
1195 | /* | |
1196 | * mos7720_set_termios | |
1197 | * this function is called by the tty driver when it wants to change the | |
1198 | * termios structure. | |
1199 | */ | |
1200 | static void mos7720_set_termios(struct usb_serial_port *port, | |
606d099c | 1201 | struct ktermios *old_termios) |
0f64478c GKH |
1202 | { |
1203 | int status; | |
1204 | unsigned int cflag; | |
1205 | struct usb_serial *serial; | |
1206 | struct moschip_port *mos7720_port; | |
1207 | struct tty_struct *tty; | |
1208 | ||
1209 | serial = port->serial; | |
1210 | ||
1211 | mos7720_port = usb_get_serial_port_data(port); | |
1212 | ||
1213 | if (mos7720_port == NULL) | |
1214 | return; | |
1215 | ||
1216 | tty = port->tty; | |
1217 | ||
0f64478c GKH |
1218 | |
1219 | if (!mos7720_port->open) { | |
1220 | dbg("%s - port not opened", __FUNCTION__); | |
1221 | return; | |
1222 | } | |
1223 | ||
1224 | dbg("%s\n","setting termios - ASPIRE"); | |
1225 | ||
1226 | cflag = tty->termios->c_cflag; | |
1227 | ||
65d063ab | 1228 | dbg("%s - cflag %08x iflag %08x", __FUNCTION__, |
0f64478c GKH |
1229 | tty->termios->c_cflag, |
1230 | RELEVANT_IFLAG(tty->termios->c_iflag)); | |
1231 | ||
65d063ab AC |
1232 | dbg("%s - old cflag %08x old iflag %08x", __FUNCTION__, |
1233 | old_termios->c_cflag, | |
1234 | RELEVANT_IFLAG(old_termios->c_iflag)); | |
0f64478c GKH |
1235 | |
1236 | dbg("%s - port %d", __FUNCTION__, port->number); | |
1237 | ||
1238 | /* change the port settings to the new ones specified */ | |
1239 | change_port_settings(mos7720_port, old_termios); | |
1240 | ||
1241 | if(!port->read_urb) { | |
1242 | dbg("%s","URB KILLED !!!!!\n"); | |
1243 | return; | |
1244 | } | |
1245 | ||
1246 | if(port->read_urb->status != -EINPROGRESS) { | |
1247 | port->read_urb->dev = serial->dev; | |
1248 | status = usb_submit_urb(port->read_urb, GFP_ATOMIC); | |
1249 | if (status) | |
1250 | dbg("usb_submit_urb(read bulk) failed, status = %d", | |
1251 | status); | |
1252 | } | |
1253 | return; | |
1254 | } | |
1255 | ||
1256 | /* | |
1257 | * get_lsr_info - get line status register info | |
1258 | * | |
1259 | * Purpose: Let user call ioctl() to get info when the UART physically | |
1260 | * is emptied. On bus types like RS485, the transmitter must | |
1261 | * release the bus after transmitting. This must be done when | |
1262 | * the transmit shift register is empty, not be done when the | |
1263 | * transmit holding register is empty. This functionality | |
1264 | * allows an RS485 driver to be written in user space. | |
1265 | */ | |
1266 | static int get_lsr_info(struct moschip_port *mos7720_port, | |
1267 | unsigned int __user *value) | |
1268 | { | |
1269 | int count; | |
1270 | unsigned int result = 0; | |
1271 | ||
1272 | count = mos7720_chars_in_buffer(mos7720_port->port); | |
1273 | if (count == 0) { | |
1274 | dbg("%s -- Empty", __FUNCTION__); | |
1275 | result = TIOCSER_TEMT; | |
1276 | } | |
1277 | ||
1278 | if (copy_to_user(value, &result, sizeof(int))) | |
1279 | return -EFAULT; | |
1280 | return 0; | |
1281 | } | |
1282 | ||
1283 | /* | |
1284 | * get_number_bytes_avail - get number of bytes available | |
1285 | * | |
1286 | * Purpose: Let user call ioctl to get the count of number of bytes available. | |
1287 | */ | |
1288 | static int get_number_bytes_avail(struct moschip_port *mos7720_port, | |
1289 | unsigned int __user *value) | |
1290 | { | |
1291 | unsigned int result = 0; | |
1292 | struct tty_struct *tty = mos7720_port->port->tty; | |
1293 | ||
1294 | if (!tty) | |
1295 | return -ENOIOCTLCMD; | |
1296 | ||
1297 | result = tty->read_cnt; | |
1298 | ||
1299 | dbg("%s(%d) = %d", __FUNCTION__, mos7720_port->port->number, result); | |
1300 | if (copy_to_user(value, &result, sizeof(int))) | |
1301 | return -EFAULT; | |
1302 | ||
1303 | return -ENOIOCTLCMD; | |
1304 | } | |
1305 | ||
1306 | static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd, | |
1307 | unsigned int __user *value) | |
1308 | { | |
1309 | unsigned int mcr ; | |
1310 | unsigned int arg; | |
1311 | unsigned char data; | |
1312 | ||
1313 | struct usb_serial_port *port; | |
1314 | ||
1315 | if (mos7720_port == NULL) | |
1316 | return -1; | |
1317 | ||
1318 | port = (struct usb_serial_port*)mos7720_port->port; | |
1319 | mcr = mos7720_port->shadowMCR; | |
1320 | ||
1321 | if (copy_from_user(&arg, value, sizeof(int))) | |
1322 | return -EFAULT; | |
1323 | ||
1324 | switch (cmd) { | |
1325 | case TIOCMBIS: | |
1326 | if (arg & TIOCM_RTS) | |
1327 | mcr |= UART_MCR_RTS; | |
1328 | if (arg & TIOCM_DTR) | |
1329 | mcr |= UART_MCR_RTS; | |
1330 | if (arg & TIOCM_LOOP) | |
1331 | mcr |= UART_MCR_LOOP; | |
1332 | break; | |
1333 | ||
1334 | case TIOCMBIC: | |
1335 | if (arg & TIOCM_RTS) | |
1336 | mcr &= ~UART_MCR_RTS; | |
1337 | if (arg & TIOCM_DTR) | |
1338 | mcr &= ~UART_MCR_RTS; | |
1339 | if (arg & TIOCM_LOOP) | |
1340 | mcr &= ~UART_MCR_LOOP; | |
1341 | break; | |
1342 | ||
1343 | case TIOCMSET: | |
1344 | /* turn off the RTS and DTR and LOOPBACK | |
1345 | * and then only turn on what was asked to */ | |
1346 | mcr &= ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP); | |
1347 | mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0); | |
1348 | mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0); | |
1349 | mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0); | |
1350 | break; | |
1351 | } | |
1352 | ||
1353 | mos7720_port->shadowMCR = mcr; | |
1354 | ||
1355 | data = mos7720_port->shadowMCR; | |
1356 | send_mos_cmd(port->serial, MOS_WRITE, | |
1357 | port->number - port->serial->minor, UART_MCR, &data); | |
1358 | ||
1359 | return 0; | |
1360 | } | |
1361 | ||
1362 | static int get_modem_info(struct moschip_port *mos7720_port, | |
1363 | unsigned int __user *value) | |
1364 | { | |
1365 | unsigned int result = 0; | |
1366 | unsigned int msr = mos7720_port->shadowMSR; | |
1367 | unsigned int mcr = mos7720_port->shadowMCR; | |
1368 | ||
1369 | result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ | |
1370 | | ((mcr & UART_MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ | |
1371 | | ((msr & UART_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ | |
1372 | | ((msr & UART_MSR_DCD) ? TIOCM_CAR: 0) /* 0x040 */ | |
1373 | | ((msr & UART_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ | |
1374 | | ((msr & UART_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ | |
1375 | ||
1376 | ||
1377 | dbg("%s -- %x", __FUNCTION__, result); | |
1378 | ||
1379 | if (copy_to_user(value, &result, sizeof(int))) | |
1380 | return -EFAULT; | |
1381 | return 0; | |
1382 | } | |
1383 | ||
1384 | static int get_serial_info(struct moschip_port *mos7720_port, | |
1385 | struct serial_struct __user *retinfo) | |
1386 | { | |
1387 | struct serial_struct tmp; | |
1388 | ||
1389 | if (!retinfo) | |
1390 | return -EFAULT; | |
1391 | ||
1392 | memset(&tmp, 0, sizeof(tmp)); | |
1393 | ||
1394 | tmp.type = PORT_16550A; | |
1395 | tmp.line = mos7720_port->port->serial->minor; | |
1396 | tmp.port = mos7720_port->port->number; | |
1397 | tmp.irq = 0; | |
1398 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
1399 | tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; | |
1400 | tmp.baud_base = 9600; | |
1401 | tmp.close_delay = 5*HZ; | |
1402 | tmp.closing_wait = 30*HZ; | |
1403 | ||
1404 | if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) | |
1405 | return -EFAULT; | |
1406 | return 0; | |
1407 | } | |
1408 | ||
1409 | static int mos7720_ioctl(struct usb_serial_port *port, struct file *file, | |
1410 | unsigned int cmd, unsigned long arg) | |
1411 | { | |
1412 | struct moschip_port *mos7720_port; | |
1413 | struct async_icount cnow; | |
1414 | struct async_icount cprev; | |
1415 | struct serial_icounter_struct icount; | |
1416 | ||
1417 | mos7720_port = usb_get_serial_port_data(port); | |
1418 | if (mos7720_port == NULL) | |
1419 | return -ENODEV; | |
1420 | ||
1421 | dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd); | |
1422 | ||
1423 | switch (cmd) { | |
1424 | case TIOCINQ: | |
1425 | /* return number of bytes available */ | |
1426 | dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number); | |
1427 | return get_number_bytes_avail(mos7720_port, | |
1428 | (unsigned int __user *)arg); | |
1429 | break; | |
1430 | ||
1431 | case TIOCSERGETLSR: | |
1432 | dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number); | |
1433 | return get_lsr_info(mos7720_port, (unsigned int __user *)arg); | |
1434 | return 0; | |
1435 | ||
1436 | case TIOCMBIS: | |
1437 | case TIOCMBIC: | |
1438 | case TIOCMSET: | |
1439 | dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__, | |
1440 | port->number); | |
1441 | return set_modem_info(mos7720_port, cmd, | |
1442 | (unsigned int __user *)arg); | |
1443 | ||
1444 | case TIOCMGET: | |
1445 | dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number); | |
1446 | return get_modem_info(mos7720_port, | |
1447 | (unsigned int __user *)arg); | |
1448 | ||
1449 | case TIOCGSERIAL: | |
1450 | dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number); | |
1451 | return get_serial_info(mos7720_port, | |
1452 | (struct serial_struct __user *)arg); | |
1453 | ||
1454 | case TIOCSSERIAL: | |
1455 | dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number); | |
1456 | break; | |
1457 | ||
1458 | case TIOCMIWAIT: | |
1459 | dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); | |
1460 | cprev = mos7720_port->icount; | |
1461 | while (1) { | |
1462 | if (signal_pending(current)) | |
1463 | return -ERESTARTSYS; | |
1464 | cnow = mos7720_port->icount; | |
1465 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
1466 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) | |
1467 | return -EIO; /* no change => error */ | |
1468 | if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || | |
1469 | ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || | |
1470 | ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || | |
1471 | ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { | |
1472 | return 0; | |
1473 | } | |
1474 | cprev = cnow; | |
1475 | } | |
1476 | /* NOTREACHED */ | |
1477 | break; | |
1478 | ||
1479 | case TIOCGICOUNT: | |
1480 | cnow = mos7720_port->icount; | |
1481 | icount.cts = cnow.cts; | |
1482 | icount.dsr = cnow.dsr; | |
1483 | icount.rng = cnow.rng; | |
1484 | icount.dcd = cnow.dcd; | |
1485 | icount.rx = cnow.rx; | |
1486 | icount.tx = cnow.tx; | |
1487 | icount.frame = cnow.frame; | |
1488 | icount.overrun = cnow.overrun; | |
1489 | icount.parity = cnow.parity; | |
1490 | icount.brk = cnow.brk; | |
1491 | icount.buf_overrun = cnow.buf_overrun; | |
1492 | ||
1493 | dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, | |
1494 | port->number, icount.rx, icount.tx ); | |
1495 | if (copy_to_user((void __user *)arg, &icount, sizeof(icount))) | |
1496 | return -EFAULT; | |
1497 | return 0; | |
1498 | } | |
1499 | ||
1500 | return -ENOIOCTLCMD; | |
1501 | } | |
1502 | ||
1503 | static int mos7720_startup(struct usb_serial *serial) | |
1504 | { | |
1505 | struct moschip_serial *mos7720_serial; | |
1506 | struct moschip_port *mos7720_port; | |
1507 | struct usb_device *dev; | |
1508 | int i; | |
1509 | char data; | |
1510 | ||
1511 | dbg("%s: Entering ..........", __FUNCTION__); | |
1512 | ||
1513 | if (!serial) { | |
1514 | dbg("Invalid Handler"); | |
1515 | return -ENODEV; | |
1516 | } | |
1517 | ||
1518 | dev = serial->dev; | |
1519 | ||
1520 | /* create our private serial structure */ | |
1521 | mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL); | |
1522 | if (mos7720_serial == NULL) { | |
1523 | err("%s - Out of memory", __FUNCTION__); | |
1524 | return -ENOMEM; | |
1525 | } | |
1526 | ||
1527 | usb_set_serial_data(serial, mos7720_serial); | |
1528 | ||
1529 | /* we set up the pointers to the endpoints in the mos7720_open * | |
1530 | * function, as the structures aren't created yet. */ | |
1531 | ||
1532 | /* set up port private structures */ | |
1533 | for (i = 0; i < serial->num_ports; ++i) { | |
1534 | mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); | |
1535 | if (mos7720_port == NULL) { | |
1536 | err("%s - Out of memory", __FUNCTION__); | |
1537 | usb_set_serial_data(serial, NULL); | |
1538 | kfree(mos7720_serial); | |
1539 | return -ENOMEM; | |
1540 | } | |
1541 | ||
1542 | /* Initialize all port interrupt end point to port 0 int | |
1543 | * endpoint. Our device has only one interrupt endpoint | |
1544 | * comman to all ports */ | |
1545 | serial->port[i]->interrupt_in_endpointAddress = serial->port[0]->interrupt_in_endpointAddress; | |
1546 | ||
1547 | mos7720_port->port = serial->port[i]; | |
1548 | usb_set_serial_port_data(serial->port[i], mos7720_port); | |
1549 | ||
1550 | dbg("port number is %d", serial->port[i]->number); | |
1551 | dbg("serial number is %d", serial->minor); | |
1552 | } | |
1553 | ||
1554 | ||
1555 | /* setting configuration feature to one */ | |
1556 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
1557 | (__u8)0x03, 0x00,0x01,0x00, NULL, 0x00, 5*HZ); | |
1558 | ||
1559 | send_mos_cmd(serial,MOS_READ,0x00, UART_LSR, &data); // LSR For Port 1 | |
1560 | dbg("LSR:%x",data); | |
1561 | ||
1562 | send_mos_cmd(serial,MOS_READ,0x01, UART_LSR, &data); // LSR For Port 2 | |
1563 | dbg("LSR:%x",data); | |
1564 | ||
1565 | return 0; | |
1566 | } | |
1567 | ||
1568 | static void mos7720_shutdown(struct usb_serial *serial) | |
1569 | { | |
1570 | int i; | |
1571 | ||
1572 | /* free private structure allocated for serial port */ | |
1573 | for (i=0; i < serial->num_ports; ++i) { | |
1574 | kfree(usb_get_serial_port_data(serial->port[i])); | |
1575 | usb_set_serial_port_data(serial->port[i], NULL); | |
1576 | } | |
1577 | ||
1578 | /* free private structure allocated for serial device */ | |
1579 | kfree(usb_get_serial_data(serial)); | |
1580 | usb_set_serial_data(serial, NULL); | |
1581 | } | |
1582 | ||
d9b1b787 JH |
1583 | static struct usb_driver usb_driver = { |
1584 | .name = "moschip7720", | |
1585 | .probe = usb_serial_probe, | |
1586 | .disconnect = usb_serial_disconnect, | |
1587 | .id_table = moschip_port_id_table, | |
1588 | .no_dynamic_id = 1, | |
1589 | }; | |
1590 | ||
0f64478c GKH |
1591 | static struct usb_serial_driver moschip7720_2port_driver = { |
1592 | .driver = { | |
1593 | .owner = THIS_MODULE, | |
1594 | .name = "moschip7720", | |
1595 | }, | |
1596 | .description = "Moschip 2 port adapter", | |
d9b1b787 | 1597 | .usb_driver = &usb_driver, |
0f64478c GKH |
1598 | .id_table = moschip_port_id_table, |
1599 | .num_interrupt_in = 1, | |
1600 | .num_bulk_in = 2, | |
1601 | .num_bulk_out = 2, | |
1602 | .num_ports = 2, | |
1603 | .open = mos7720_open, | |
1604 | .close = mos7720_close, | |
1605 | .throttle = mos7720_throttle, | |
1606 | .unthrottle = mos7720_unthrottle, | |
1607 | .attach = mos7720_startup, | |
1608 | .shutdown = mos7720_shutdown, | |
1609 | .ioctl = mos7720_ioctl, | |
1610 | .set_termios = mos7720_set_termios, | |
1611 | .write = mos7720_write, | |
1612 | .write_room = mos7720_write_room, | |
1613 | .chars_in_buffer = mos7720_chars_in_buffer, | |
1614 | .break_ctl = mos7720_break, | |
1615 | .read_bulk_callback = mos7720_bulk_in_callback, | |
e8e30c76 | 1616 | .read_int_callback = mos7720_interrupt_callback, |
0f64478c GKH |
1617 | }; |
1618 | ||
0f64478c GKH |
1619 | static int __init moschip7720_init(void) |
1620 | { | |
1621 | int retval; | |
1622 | ||
1623 | dbg("%s: Entering ..........", __FUNCTION__); | |
1624 | ||
1625 | /* Register with the usb serial */ | |
1626 | retval = usb_serial_register(&moschip7720_2port_driver); | |
1627 | if (retval) | |
1628 | goto failed_port_device_register; | |
1629 | ||
1630 | info(DRIVER_DESC " " DRIVER_VERSION); | |
1631 | ||
1632 | /* Register with the usb */ | |
1633 | retval = usb_register(&usb_driver); | |
1634 | if (retval) | |
1635 | goto failed_usb_register; | |
1636 | ||
1637 | return 0; | |
1638 | ||
1639 | failed_usb_register: | |
1640 | usb_serial_deregister(&moschip7720_2port_driver); | |
1641 | ||
1642 | failed_port_device_register: | |
1643 | return retval; | |
1644 | } | |
1645 | ||
1646 | static void __exit moschip7720_exit(void) | |
1647 | { | |
1648 | usb_deregister(&usb_driver); | |
1649 | usb_serial_deregister(&moschip7720_2port_driver); | |
1650 | } | |
1651 | ||
1652 | module_init(moschip7720_init); | |
1653 | module_exit(moschip7720_exit); | |
1654 | ||
1655 | /* Module information */ | |
1656 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1657 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1658 | MODULE_LICENSE("GPL"); | |
1659 | ||
1660 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1661 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |