Commit | Line | Data |
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1da177e4 LT |
1 | /*****************************************************************************/ |
2 | ||
3 | /* | |
4 | * uss720.c -- USS720 USB Parport Cable. | |
5 | * | |
ecc1624a | 6 | * Copyright (C) 1999, 2005, 2010 |
0f36163d | 7 | * Thomas Sailer (t.sailer@alumni.ethz.ch) |
1da177e4 LT |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | * | |
23 | * Based on parport_pc.c | |
24 | * | |
25 | * History: | |
0f36163d TS |
26 | * 0.1 04.08.1999 Created |
27 | * 0.2 07.08.1999 Some fixes mainly suggested by Tim Waugh | |
28 | * Interrupt handling currently disabled because | |
29 | * usb_request_irq crashes somewhere within ohci.c | |
30 | * for no apparent reason (that is for me, anyway) | |
31 | * ECP currently untested | |
32 | * 0.3 10.08.1999 fixing merge errors | |
33 | * 0.4 13.08.1999 Added Vendor/Product ID of Brad Hard's cable | |
34 | * 0.5 20.09.1999 usb_control_msg wrapper used | |
35 | * Nov01.2000 usb_device_table support by Adam J. Richter | |
36 | * 08.04.2001 Identify version on module load. gb | |
37 | * 0.6 02.09.2005 Fix "scheduling in interrupt" problem by making save/restore | |
38 | * context asynchronous | |
1da177e4 LT |
39 | * |
40 | */ | |
41 | ||
42 | /*****************************************************************************/ | |
43 | ||
44 | #include <linux/module.h> | |
45 | #include <linux/socket.h> | |
46 | #include <linux/parport.h> | |
47 | #include <linux/init.h> | |
48 | #include <linux/usb.h> | |
49 | #include <linux/delay.h> | |
0f36163d TS |
50 | #include <linux/completion.h> |
51 | #include <linux/kref.h> | |
5a0e3ad6 | 52 | #include <linux/slab.h> |
1da177e4 LT |
53 | |
54 | /* | |
55 | * Version Information | |
56 | */ | |
0f36163d TS |
57 | #define DRIVER_VERSION "v0.6" |
58 | #define DRIVER_AUTHOR "Thomas M. Sailer, t.sailer@alumni.ethz.ch" | |
1da177e4 LT |
59 | #define DRIVER_DESC "USB Parport Cable driver for Cables using the Lucent Technologies USS720 Chip" |
60 | ||
61 | /* --------------------------------------------------------------------- */ | |
62 | ||
63 | struct parport_uss720_private { | |
64 | struct usb_device *usbdev; | |
0f36163d TS |
65 | struct parport *pp; |
66 | struct kref ref_count; | |
67 | __u8 reg[7]; /* USB registers */ | |
68 | struct list_head asynclist; | |
69 | spinlock_t asynclock; | |
70 | }; | |
71 | ||
72 | struct uss720_async_request { | |
73 | struct parport_uss720_private *priv; | |
74 | struct kref ref_count; | |
75 | struct list_head asynclist; | |
76 | struct completion compl; | |
77 | struct urb *urb; | |
78 | struct usb_ctrlrequest dr; | |
79 | __u8 reg[7]; | |
1da177e4 LT |
80 | }; |
81 | ||
82 | /* --------------------------------------------------------------------- */ | |
83 | ||
0f36163d | 84 | static void destroy_priv(struct kref *kref) |
1da177e4 | 85 | { |
0f36163d | 86 | struct parport_uss720_private *priv = container_of(kref, struct parport_uss720_private, ref_count); |
1da177e4 | 87 | |
0f36163d TS |
88 | usb_put_dev(priv->usbdev); |
89 | kfree(priv); | |
90 | dbg("destroying priv datastructure"); | |
91 | } | |
92 | ||
93 | static void destroy_async(struct kref *kref) | |
94 | { | |
95 | struct uss720_async_request *rq = container_of(kref, struct uss720_async_request, ref_count); | |
96 | struct parport_uss720_private *priv = rq->priv; | |
97 | unsigned long flags; | |
98 | ||
99 | if (likely(rq->urb)) | |
100 | usb_free_urb(rq->urb); | |
101 | spin_lock_irqsave(&priv->asynclock, flags); | |
102 | list_del_init(&rq->asynclist); | |
103 | spin_unlock_irqrestore(&priv->asynclock, flags); | |
104 | kfree(rq); | |
105 | kref_put(&priv->ref_count, destroy_priv); | |
106 | } | |
107 | ||
108 | /* --------------------------------------------------------------------- */ | |
109 | ||
7d12e780 | 110 | static void async_complete(struct urb *urb) |
0f36163d TS |
111 | { |
112 | struct uss720_async_request *rq; | |
113 | struct parport *pp; | |
114 | struct parport_uss720_private *priv; | |
82210d37 | 115 | int status = urb->status; |
0f36163d TS |
116 | |
117 | rq = urb->context; | |
118 | priv = rq->priv; | |
119 | pp = priv->pp; | |
82210d37 GKH |
120 | if (status) { |
121 | err("async_complete: urb error %d", status); | |
0f36163d TS |
122 | } else if (rq->dr.bRequest == 3) { |
123 | memcpy(priv->reg, rq->reg, sizeof(priv->reg)); | |
1da177e4 | 124 | #if 0 |
0f36163d TS |
125 | dbg("async_complete regs %02x %02x %02x %02x %02x %02x %02x", |
126 | (unsigned int)priv->reg[0], (unsigned int)priv->reg[1], (unsigned int)priv->reg[2], | |
127 | (unsigned int)priv->reg[3], (unsigned int)priv->reg[4], (unsigned int)priv->reg[5], | |
128 | (unsigned int)priv->reg[6]); | |
1da177e4 LT |
129 | #endif |
130 | /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */ | |
0f36163d | 131 | if (rq->reg[2] & rq->reg[1] & 0x10 && pp) |
f230d101 | 132 | parport_generic_irq(pp); |
1da177e4 | 133 | } |
0f36163d TS |
134 | complete(&rq->compl); |
135 | kref_put(&rq->ref_count, destroy_async); | |
1da177e4 LT |
136 | } |
137 | ||
0f36163d TS |
138 | static struct uss720_async_request *submit_async_request(struct parport_uss720_private *priv, |
139 | __u8 request, __u8 requesttype, __u16 value, __u16 index, | |
55016f10 | 140 | gfp_t mem_flags) |
1da177e4 | 141 | { |
0f36163d TS |
142 | struct usb_device *usbdev; |
143 | struct uss720_async_request *rq; | |
144 | unsigned long flags; | |
1da177e4 LT |
145 | int ret; |
146 | ||
0f36163d TS |
147 | if (!priv) |
148 | return NULL; | |
149 | usbdev = priv->usbdev; | |
1da177e4 | 150 | if (!usbdev) |
0f36163d TS |
151 | return NULL; |
152 | rq = kmalloc(sizeof(struct uss720_async_request), mem_flags); | |
153 | if (!rq) { | |
154 | err("submit_async_request out of memory"); | |
155 | return NULL; | |
156 | } | |
157 | kref_init(&rq->ref_count); | |
158 | INIT_LIST_HEAD(&rq->asynclist); | |
159 | init_completion(&rq->compl); | |
160 | kref_get(&priv->ref_count); | |
161 | rq->priv = priv; | |
162 | rq->urb = usb_alloc_urb(0, mem_flags); | |
163 | if (!rq->urb) { | |
164 | kref_put(&rq->ref_count, destroy_async); | |
165 | err("submit_async_request out of memory"); | |
166 | return NULL; | |
167 | } | |
168 | rq->dr.bRequestType = requesttype; | |
169 | rq->dr.bRequest = request; | |
170 | rq->dr.wValue = cpu_to_le16(value); | |
171 | rq->dr.wIndex = cpu_to_le16(index); | |
172 | rq->dr.wLength = cpu_to_le16((request == 3) ? sizeof(rq->reg) : 0); | |
173 | usb_fill_control_urb(rq->urb, usbdev, (requesttype & 0x80) ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0), | |
174 | (unsigned char *)&rq->dr, | |
175 | (request == 3) ? rq->reg : NULL, (request == 3) ? sizeof(rq->reg) : 0, async_complete, rq); | |
176 | /* rq->urb->transfer_flags |= URB_ASYNC_UNLINK; */ | |
177 | spin_lock_irqsave(&priv->asynclock, flags); | |
178 | list_add_tail(&rq->asynclist, &priv->asynclist); | |
179 | spin_unlock_irqrestore(&priv->asynclock, flags); | |
180 | ret = usb_submit_urb(rq->urb, mem_flags); | |
181 | if (!ret) { | |
182 | kref_get(&rq->ref_count); | |
183 | return rq; | |
1da177e4 | 184 | } |
0f36163d TS |
185 | kref_put(&rq->ref_count, destroy_async); |
186 | err("submit_async_request submit_urb failed with %d", ret); | |
187 | return NULL; | |
188 | } | |
189 | ||
190 | static unsigned int kill_all_async_requests_priv(struct parport_uss720_private *priv) | |
191 | { | |
192 | struct uss720_async_request *rq; | |
193 | unsigned long flags; | |
194 | unsigned int ret = 0; | |
195 | ||
196 | spin_lock_irqsave(&priv->asynclock, flags); | |
197 | list_for_each_entry(rq, &priv->asynclist, asynclist) { | |
198 | usb_unlink_urb(rq->urb); | |
199 | ret++; | |
200 | } | |
201 | spin_unlock_irqrestore(&priv->asynclock, flags); | |
1da177e4 LT |
202 | return ret; |
203 | } | |
204 | ||
205 | /* --------------------------------------------------------------------- */ | |
206 | ||
55016f10 | 207 | static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val, gfp_t mem_flags) |
0f36163d TS |
208 | { |
209 | struct parport_uss720_private *priv; | |
210 | struct uss720_async_request *rq; | |
211 | static const unsigned char regindex[9] = { | |
212 | 4, 0, 1, 5, 5, 0, 2, 3, 6 | |
213 | }; | |
214 | int ret; | |
215 | ||
216 | if (!pp) | |
217 | return -EIO; | |
218 | priv = pp->private_data; | |
219 | rq = submit_async_request(priv, 3, 0xc0, ((unsigned int)reg) << 8, 0, mem_flags); | |
220 | if (!rq) { | |
221 | err("get_1284_register(%u) failed", (unsigned int)reg); | |
222 | return -EIO; | |
223 | } | |
224 | if (!val) { | |
225 | kref_put(&rq->ref_count, destroy_async); | |
226 | return 0; | |
227 | } | |
228 | if (wait_for_completion_timeout(&rq->compl, HZ)) { | |
229 | ret = rq->urb->status; | |
230 | *val = priv->reg[(reg >= 9) ? 0 : regindex[reg]]; | |
231 | if (ret) | |
3b6004f3 GKH |
232 | printk(KERN_WARNING "get_1284_register: " |
233 | "usb error %d\n", ret); | |
0f36163d TS |
234 | kref_put(&rq->ref_count, destroy_async); |
235 | return ret; | |
236 | } | |
3b6004f3 | 237 | printk(KERN_WARNING "get_1284_register timeout\n"); |
0f36163d TS |
238 | kill_all_async_requests_priv(priv); |
239 | return -EIO; | |
240 | } | |
241 | ||
55016f10 | 242 | static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val, gfp_t mem_flags) |
0f36163d TS |
243 | { |
244 | struct parport_uss720_private *priv; | |
245 | struct uss720_async_request *rq; | |
246 | ||
247 | if (!pp) | |
248 | return -EIO; | |
249 | priv = pp->private_data; | |
250 | rq = submit_async_request(priv, 4, 0x40, (((unsigned int)reg) << 8) | val, 0, mem_flags); | |
251 | if (!rq) { | |
252 | err("set_1284_register(%u,%u) failed", (unsigned int)reg, (unsigned int)val); | |
253 | return -EIO; | |
254 | } | |
255 | kref_put(&rq->ref_count, destroy_async); | |
256 | return 0; | |
257 | } | |
258 | ||
259 | /* --------------------------------------------------------------------- */ | |
260 | ||
1da177e4 LT |
261 | /* ECR modes */ |
262 | #define ECR_SPP 00 | |
263 | #define ECR_PS2 01 | |
264 | #define ECR_PPF 02 | |
265 | #define ECR_ECP 03 | |
266 | #define ECR_EPP 04 | |
267 | ||
268 | /* Safely change the mode bits in the ECR */ | |
269 | static int change_mode(struct parport *pp, int m) | |
270 | { | |
271 | struct parport_uss720_private *priv = pp->private_data; | |
272 | int mode; | |
0f36163d | 273 | __u8 reg; |
1da177e4 | 274 | |
0f36163d | 275 | if (get_1284_register(pp, 6, ®, GFP_KERNEL)) |
1da177e4 LT |
276 | return -EIO; |
277 | /* Bits <7:5> contain the mode. */ | |
278 | mode = (priv->reg[2] >> 5) & 0x7; | |
279 | if (mode == m) | |
280 | return 0; | |
281 | /* We have to go through mode 000 or 001 */ | |
282 | if (mode > ECR_PS2 && m > ECR_PS2) | |
283 | if (change_mode(pp, ECR_PS2)) | |
284 | return -EIO; | |
285 | ||
286 | if (m <= ECR_PS2 && !(priv->reg[1] & 0x20)) { | |
287 | /* This mode resets the FIFO, so we may | |
288 | * have to wait for it to drain first. */ | |
289 | unsigned long expire = jiffies + pp->physport->cad->timeout; | |
290 | switch (mode) { | |
291 | case ECR_PPF: /* Parallel Port FIFO mode */ | |
292 | case ECR_ECP: /* ECP Parallel Port mode */ | |
293 | /* Poll slowly. */ | |
294 | for (;;) { | |
0f36163d | 295 | if (get_1284_register(pp, 6, ®, GFP_KERNEL)) |
1da177e4 LT |
296 | return -EIO; |
297 | if (priv->reg[2] & 0x01) | |
298 | break; | |
299 | if (time_after_eq (jiffies, expire)) | |
300 | /* The FIFO is stuck. */ | |
301 | return -EBUSY; | |
302 | msleep_interruptible(10); | |
303 | if (signal_pending (current)) | |
304 | break; | |
305 | } | |
306 | } | |
307 | } | |
308 | /* Set the mode. */ | |
0f36163d TS |
309 | if (set_1284_register(pp, 6, m << 5, GFP_KERNEL)) |
310 | return -EIO; | |
311 | if (get_1284_register(pp, 6, ®, GFP_KERNEL)) | |
1da177e4 LT |
312 | return -EIO; |
313 | return 0; | |
314 | } | |
315 | ||
316 | /* | |
317 | * Clear TIMEOUT BIT in EPP MODE | |
318 | */ | |
319 | static int clear_epp_timeout(struct parport *pp) | |
320 | { | |
321 | unsigned char stat; | |
322 | ||
0f36163d | 323 | if (get_1284_register(pp, 1, &stat, GFP_KERNEL)) |
1da177e4 LT |
324 | return 1; |
325 | return stat & 1; | |
326 | } | |
327 | ||
328 | /* | |
329 | * Access functions. | |
330 | */ | |
331 | #if 0 | |
332 | static int uss720_irq(int usbstatus, void *buffer, int len, void *dev_id) | |
333 | { | |
334 | struct parport *pp = (struct parport *)dev_id; | |
335 | struct parport_uss720_private *priv = pp->private_data; | |
336 | ||
337 | if (usbstatus != 0 || len < 4 || !buffer) | |
338 | return 1; | |
339 | memcpy(priv->reg, buffer, 4); | |
340 | /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */ | |
341 | if (priv->reg[2] & priv->reg[1] & 0x10) | |
f230d101 | 342 | parport_generic_irq(pp); |
1da177e4 LT |
343 | return 1; |
344 | } | |
345 | #endif | |
346 | ||
347 | static void parport_uss720_write_data(struct parport *pp, unsigned char d) | |
348 | { | |
0f36163d | 349 | set_1284_register(pp, 0, d, GFP_KERNEL); |
1da177e4 LT |
350 | } |
351 | ||
352 | static unsigned char parport_uss720_read_data(struct parport *pp) | |
353 | { | |
354 | unsigned char ret; | |
355 | ||
0f36163d | 356 | if (get_1284_register(pp, 0, &ret, GFP_KERNEL)) |
1da177e4 LT |
357 | return 0; |
358 | return ret; | |
359 | } | |
360 | ||
361 | static void parport_uss720_write_control(struct parport *pp, unsigned char d) | |
362 | { | |
363 | struct parport_uss720_private *priv = pp->private_data; | |
364 | ||
365 | d = (d & 0xf) | (priv->reg[1] & 0xf0); | |
0f36163d | 366 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
367 | return; |
368 | priv->reg[1] = d; | |
369 | } | |
370 | ||
371 | static unsigned char parport_uss720_read_control(struct parport *pp) | |
372 | { | |
373 | struct parport_uss720_private *priv = pp->private_data; | |
374 | return priv->reg[1] & 0xf; /* Use soft copy */ | |
375 | } | |
376 | ||
377 | static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val) | |
378 | { | |
379 | struct parport_uss720_private *priv = pp->private_data; | |
380 | unsigned char d; | |
381 | ||
382 | mask &= 0x0f; | |
383 | val &= 0x0f; | |
384 | d = (priv->reg[1] & (~mask)) ^ val; | |
0f36163d | 385 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
386 | return 0; |
387 | priv->reg[1] = d; | |
388 | return d & 0xf; | |
389 | } | |
390 | ||
391 | static unsigned char parport_uss720_read_status(struct parport *pp) | |
392 | { | |
393 | unsigned char ret; | |
394 | ||
0f36163d | 395 | if (get_1284_register(pp, 1, &ret, GFP_KERNEL)) |
1da177e4 LT |
396 | return 0; |
397 | return ret & 0xf8; | |
398 | } | |
399 | ||
400 | static void parport_uss720_disable_irq(struct parport *pp) | |
401 | { | |
402 | struct parport_uss720_private *priv = pp->private_data; | |
403 | unsigned char d; | |
404 | ||
405 | d = priv->reg[1] & ~0x10; | |
0f36163d | 406 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
407 | return; |
408 | priv->reg[1] = d; | |
409 | } | |
410 | ||
411 | static void parport_uss720_enable_irq(struct parport *pp) | |
412 | { | |
413 | struct parport_uss720_private *priv = pp->private_data; | |
414 | unsigned char d; | |
415 | ||
416 | d = priv->reg[1] | 0x10; | |
0f36163d | 417 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
418 | return; |
419 | priv->reg[1] = d; | |
420 | } | |
421 | ||
422 | static void parport_uss720_data_forward (struct parport *pp) | |
423 | { | |
424 | struct parport_uss720_private *priv = pp->private_data; | |
425 | unsigned char d; | |
426 | ||
427 | d = priv->reg[1] & ~0x20; | |
0f36163d | 428 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
429 | return; |
430 | priv->reg[1] = d; | |
431 | } | |
432 | ||
433 | static void parport_uss720_data_reverse (struct parport *pp) | |
434 | { | |
435 | struct parport_uss720_private *priv = pp->private_data; | |
436 | unsigned char d; | |
437 | ||
438 | d = priv->reg[1] | 0x20; | |
0f36163d | 439 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
440 | return; |
441 | priv->reg[1] = d; | |
442 | } | |
443 | ||
444 | static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s) | |
445 | { | |
446 | s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0); | |
447 | s->u.pc.ecr = 0x24; | |
448 | } | |
449 | ||
450 | static void parport_uss720_save_state(struct parport *pp, struct parport_state *s) | |
451 | { | |
452 | struct parport_uss720_private *priv = pp->private_data; | |
453 | ||
0f36163d TS |
454 | #if 0 |
455 | if (get_1284_register(pp, 2, NULL, GFP_ATOMIC)) | |
1da177e4 | 456 | return; |
0f36163d | 457 | #endif |
1da177e4 LT |
458 | s->u.pc.ctr = priv->reg[1]; |
459 | s->u.pc.ecr = priv->reg[2]; | |
460 | } | |
461 | ||
462 | static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s) | |
463 | { | |
0f36163d TS |
464 | struct parport_uss720_private *priv = pp->private_data; |
465 | ||
466 | set_1284_register(pp, 2, s->u.pc.ctr, GFP_ATOMIC); | |
467 | set_1284_register(pp, 6, s->u.pc.ecr, GFP_ATOMIC); | |
468 | get_1284_register(pp, 2, NULL, GFP_ATOMIC); | |
469 | priv->reg[1] = s->u.pc.ctr; | |
470 | priv->reg[2] = s->u.pc.ecr; | |
1da177e4 LT |
471 | } |
472 | ||
473 | static size_t parport_uss720_epp_read_data(struct parport *pp, void *buf, size_t length, int flags) | |
474 | { | |
475 | struct parport_uss720_private *priv = pp->private_data; | |
476 | size_t got = 0; | |
477 | ||
478 | if (change_mode(pp, ECR_EPP)) | |
479 | return 0; | |
480 | for (; got < length; got++) { | |
0f36163d | 481 | if (get_1284_register(pp, 4, (char *)buf, GFP_KERNEL)) |
1da177e4 LT |
482 | break; |
483 | buf++; | |
484 | if (priv->reg[0] & 0x01) { | |
485 | clear_epp_timeout(pp); | |
486 | break; | |
487 | } | |
488 | } | |
489 | change_mode(pp, ECR_PS2); | |
490 | return got; | |
491 | } | |
492 | ||
493 | static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf, size_t length, int flags) | |
494 | { | |
495 | #if 0 | |
496 | struct parport_uss720_private *priv = pp->private_data; | |
497 | size_t written = 0; | |
498 | ||
499 | if (change_mode(pp, ECR_EPP)) | |
500 | return 0; | |
501 | for (; written < length; written++) { | |
0f36163d | 502 | if (set_1284_register(pp, 4, (char *)buf, GFP_KERNEL)) |
1da177e4 LT |
503 | break; |
504 | ((char*)buf)++; | |
0f36163d | 505 | if (get_1284_register(pp, 1, NULL, GFP_KERNEL)) |
1da177e4 LT |
506 | break; |
507 | if (priv->reg[0] & 0x01) { | |
508 | clear_epp_timeout(pp); | |
509 | break; | |
510 | } | |
511 | } | |
512 | change_mode(pp, ECR_PS2); | |
513 | return written; | |
514 | #else | |
515 | struct parport_uss720_private *priv = pp->private_data; | |
516 | struct usb_device *usbdev = priv->usbdev; | |
517 | int rlen; | |
518 | int i; | |
519 | ||
520 | if (!usbdev) | |
521 | return 0; | |
522 | if (change_mode(pp, ECR_EPP)) | |
523 | return 0; | |
524 | i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buf, length, &rlen, 20000); | |
525 | if (i) | |
526 | printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buf, length, rlen); | |
527 | change_mode(pp, ECR_PS2); | |
528 | return rlen; | |
529 | #endif | |
530 | } | |
531 | ||
532 | static size_t parport_uss720_epp_read_addr(struct parport *pp, void *buf, size_t length, int flags) | |
533 | { | |
534 | struct parport_uss720_private *priv = pp->private_data; | |
535 | size_t got = 0; | |
536 | ||
537 | if (change_mode(pp, ECR_EPP)) | |
538 | return 0; | |
539 | for (; got < length; got++) { | |
0f36163d | 540 | if (get_1284_register(pp, 3, (char *)buf, GFP_KERNEL)) |
1da177e4 LT |
541 | break; |
542 | buf++; | |
543 | if (priv->reg[0] & 0x01) { | |
544 | clear_epp_timeout(pp); | |
545 | break; | |
546 | } | |
547 | } | |
548 | change_mode(pp, ECR_PS2); | |
549 | return got; | |
550 | } | |
551 | ||
552 | static size_t parport_uss720_epp_write_addr(struct parport *pp, const void *buf, size_t length, int flags) | |
553 | { | |
554 | struct parport_uss720_private *priv = pp->private_data; | |
555 | size_t written = 0; | |
556 | ||
557 | if (change_mode(pp, ECR_EPP)) | |
558 | return 0; | |
559 | for (; written < length; written++) { | |
0f36163d | 560 | if (set_1284_register(pp, 3, *(char *)buf, GFP_KERNEL)) |
1da177e4 LT |
561 | break; |
562 | buf++; | |
0f36163d | 563 | if (get_1284_register(pp, 1, NULL, GFP_KERNEL)) |
1da177e4 LT |
564 | break; |
565 | if (priv->reg[0] & 0x01) { | |
566 | clear_epp_timeout(pp); | |
567 | break; | |
568 | } | |
569 | } | |
570 | change_mode(pp, ECR_PS2); | |
571 | return written; | |
572 | } | |
573 | ||
574 | static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buffer, size_t len, int flags) | |
575 | { | |
576 | struct parport_uss720_private *priv = pp->private_data; | |
577 | struct usb_device *usbdev = priv->usbdev; | |
578 | int rlen; | |
579 | int i; | |
580 | ||
581 | if (!usbdev) | |
582 | return 0; | |
583 | if (change_mode(pp, ECR_ECP)) | |
584 | return 0; | |
585 | i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000); | |
586 | if (i) | |
587 | printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen); | |
588 | change_mode(pp, ECR_PS2); | |
589 | return rlen; | |
590 | } | |
591 | ||
592 | static size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, size_t len, int flags) | |
593 | { | |
594 | struct parport_uss720_private *priv = pp->private_data; | |
595 | struct usb_device *usbdev = priv->usbdev; | |
596 | int rlen; | |
597 | int i; | |
598 | ||
599 | if (!usbdev) | |
600 | return 0; | |
601 | if (change_mode(pp, ECR_ECP)) | |
602 | return 0; | |
603 | i = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, 2), buffer, len, &rlen, 20000); | |
604 | if (i) | |
605 | printk(KERN_ERR "uss720: recvbulk ep 2 buf %p len %Zu rlen %u\n", buffer, len, rlen); | |
606 | change_mode(pp, ECR_PS2); | |
607 | return rlen; | |
608 | } | |
609 | ||
610 | static size_t parport_uss720_ecp_write_addr(struct parport *pp, const void *buffer, size_t len, int flags) | |
611 | { | |
612 | size_t written = 0; | |
613 | ||
614 | if (change_mode(pp, ECR_ECP)) | |
615 | return 0; | |
616 | for (; written < len; written++) { | |
0f36163d | 617 | if (set_1284_register(pp, 5, *(char *)buffer, GFP_KERNEL)) |
1da177e4 LT |
618 | break; |
619 | buffer++; | |
620 | } | |
621 | change_mode(pp, ECR_PS2); | |
622 | return written; | |
623 | } | |
624 | ||
625 | static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer, size_t len, int flags) | |
626 | { | |
627 | struct parport_uss720_private *priv = pp->private_data; | |
628 | struct usb_device *usbdev = priv->usbdev; | |
629 | int rlen; | |
630 | int i; | |
631 | ||
632 | if (!usbdev) | |
633 | return 0; | |
634 | if (change_mode(pp, ECR_PPF)) | |
635 | return 0; | |
636 | i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000); | |
637 | if (i) | |
638 | printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen); | |
639 | change_mode(pp, ECR_PS2); | |
640 | return rlen; | |
641 | } | |
642 | ||
643 | /* --------------------------------------------------------------------- */ | |
644 | ||
645 | static struct parport_operations parport_uss720_ops = | |
646 | { | |
647 | .owner = THIS_MODULE, | |
648 | .write_data = parport_uss720_write_data, | |
649 | .read_data = parport_uss720_read_data, | |
650 | ||
651 | .write_control = parport_uss720_write_control, | |
652 | .read_control = parport_uss720_read_control, | |
653 | .frob_control = parport_uss720_frob_control, | |
654 | ||
655 | .read_status = parport_uss720_read_status, | |
656 | ||
657 | .enable_irq = parport_uss720_enable_irq, | |
658 | .disable_irq = parport_uss720_disable_irq, | |
659 | ||
660 | .data_forward = parport_uss720_data_forward, | |
661 | .data_reverse = parport_uss720_data_reverse, | |
662 | ||
663 | .init_state = parport_uss720_init_state, | |
664 | .save_state = parport_uss720_save_state, | |
665 | .restore_state = parport_uss720_restore_state, | |
666 | ||
667 | .epp_write_data = parport_uss720_epp_write_data, | |
668 | .epp_read_data = parport_uss720_epp_read_data, | |
669 | .epp_write_addr = parport_uss720_epp_write_addr, | |
670 | .epp_read_addr = parport_uss720_epp_read_addr, | |
671 | ||
672 | .ecp_write_data = parport_uss720_ecp_write_data, | |
673 | .ecp_read_data = parport_uss720_ecp_read_data, | |
674 | .ecp_write_addr = parport_uss720_ecp_write_addr, | |
675 | ||
676 | .compat_write_data = parport_uss720_write_compat, | |
677 | .nibble_read_data = parport_ieee1284_read_nibble, | |
678 | .byte_read_data = parport_ieee1284_read_byte, | |
679 | }; | |
680 | ||
681 | /* --------------------------------------------------------------------- */ | |
682 | ||
683 | static int uss720_probe(struct usb_interface *intf, | |
684 | const struct usb_device_id *id) | |
685 | { | |
0f36163d | 686 | struct usb_device *usbdev = usb_get_dev(interface_to_usbdev(intf)); |
1da177e4 LT |
687 | struct usb_host_interface *interface; |
688 | struct usb_host_endpoint *endpoint; | |
689 | struct parport_uss720_private *priv; | |
690 | struct parport *pp; | |
0f36163d | 691 | unsigned char reg; |
1da177e4 LT |
692 | int i; |
693 | ||
0f36163d TS |
694 | dbg("probe: vendor id 0x%x, device id 0x%x\n", |
695 | le16_to_cpu(usbdev->descriptor.idVendor), | |
696 | le16_to_cpu(usbdev->descriptor.idProduct)); | |
1da177e4 LT |
697 | |
698 | /* our known interfaces have 3 alternate settings */ | |
0f36163d TS |
699 | if (intf->num_altsetting != 3) { |
700 | usb_put_dev(usbdev); | |
1da177e4 | 701 | return -ENODEV; |
0f36163d | 702 | } |
1da177e4 | 703 | i = usb_set_interface(usbdev, intf->altsetting->desc.bInterfaceNumber, 2); |
0f36163d | 704 | dbg("set inteface result %d", i); |
1da177e4 LT |
705 | |
706 | interface = intf->cur_altsetting; | |
707 | ||
708 | /* | |
709 | * Allocate parport interface | |
710 | */ | |
cd861280 | 711 | if (!(priv = kzalloc(sizeof(struct parport_uss720_private), GFP_KERNEL))) { |
0f36163d | 712 | usb_put_dev(usbdev); |
1da177e4 | 713 | return -ENOMEM; |
0f36163d TS |
714 | } |
715 | priv->pp = NULL; | |
716 | priv->usbdev = usbdev; | |
717 | kref_init(&priv->ref_count); | |
718 | spin_lock_init(&priv->asynclock); | |
719 | INIT_LIST_HEAD(&priv->asynclist); | |
1da177e4 | 720 | if (!(pp = parport_register_port(0, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &parport_uss720_ops))) { |
3b6004f3 | 721 | printk(KERN_WARNING "uss720: could not register parport\n"); |
1da177e4 LT |
722 | goto probe_abort; |
723 | } | |
724 | ||
0f36163d | 725 | priv->pp = pp; |
1da177e4 | 726 | pp->private_data = priv; |
1da177e4 LT |
727 | pp->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP | PARPORT_MODE_ECP | PARPORT_MODE_COMPAT; |
728 | ||
729 | /* set the USS720 control register to manual mode, no ECP compression, enable all ints */ | |
0f36163d TS |
730 | set_1284_register(pp, 7, 0x00, GFP_KERNEL); |
731 | set_1284_register(pp, 6, 0x30, GFP_KERNEL); /* PS/2 mode */ | |
732 | set_1284_register(pp, 2, 0x0c, GFP_KERNEL); | |
1da177e4 | 733 | /* debugging */ |
0f36163d TS |
734 | get_1284_register(pp, 0, ®, GFP_KERNEL); |
735 | dbg("reg: %02x %02x %02x %02x %02x %02x %02x", | |
736 | priv->reg[0], priv->reg[1], priv->reg[2], priv->reg[3], priv->reg[4], priv->reg[5], priv->reg[6]); | |
1da177e4 LT |
737 | |
738 | endpoint = &interface->endpoint[2]; | |
0f36163d | 739 | dbg("epaddr %d interval %d", endpoint->desc.bEndpointAddress, endpoint->desc.bInterval); |
1da177e4 LT |
740 | parport_announce_port(pp); |
741 | ||
0f36163d | 742 | usb_set_intfdata(intf, pp); |
1da177e4 LT |
743 | return 0; |
744 | ||
1da177e4 | 745 | probe_abort: |
0f36163d TS |
746 | kill_all_async_requests_priv(priv); |
747 | kref_put(&priv->ref_count, destroy_priv); | |
1da177e4 LT |
748 | return -ENODEV; |
749 | } | |
750 | ||
751 | static void uss720_disconnect(struct usb_interface *intf) | |
752 | { | |
0f36163d | 753 | struct parport *pp = usb_get_intfdata(intf); |
1da177e4 | 754 | struct parport_uss720_private *priv; |
0f36163d | 755 | struct usb_device *usbdev; |
1da177e4 | 756 | |
0f36163d TS |
757 | dbg("disconnect"); |
758 | usb_set_intfdata(intf, NULL); | |
1da177e4 LT |
759 | if (pp) { |
760 | priv = pp->private_data; | |
0f36163d | 761 | usbdev = priv->usbdev; |
1da177e4 | 762 | priv->usbdev = NULL; |
0f36163d TS |
763 | priv->pp = NULL; |
764 | dbg("parport_remove_port"); | |
765 | parport_remove_port(pp); | |
1da177e4 | 766 | parport_put_port(pp); |
0f36163d TS |
767 | kill_all_async_requests_priv(priv); |
768 | kref_put(&priv->ref_count, destroy_priv); | |
1da177e4 | 769 | } |
0f36163d | 770 | dbg("disconnect done"); |
1da177e4 LT |
771 | } |
772 | ||
773 | /* table of cables that work through this driver */ | |
33b9e162 | 774 | static const struct usb_device_id uss720_table[] = { |
1da177e4 LT |
775 | { USB_DEVICE(0x047e, 0x1001) }, |
776 | { USB_DEVICE(0x0557, 0x2001) }, | |
777 | { USB_DEVICE(0x0729, 0x1284) }, | |
778 | { USB_DEVICE(0x1293, 0x0002) }, | |
ecc1624a TS |
779 | { USB_DEVICE(0x1293, 0x0002) }, |
780 | { USB_DEVICE(0x050d, 0x0002) }, | |
1da177e4 LT |
781 | { } /* Terminating entry */ |
782 | }; | |
783 | ||
784 | MODULE_DEVICE_TABLE (usb, uss720_table); | |
785 | ||
786 | ||
787 | static struct usb_driver uss720_driver = { | |
1da177e4 LT |
788 | .name = "uss720", |
789 | .probe = uss720_probe, | |
790 | .disconnect = uss720_disconnect, | |
791 | .id_table = uss720_table, | |
792 | }; | |
793 | ||
794 | /* --------------------------------------------------------------------- */ | |
795 | ||
0f36163d TS |
796 | MODULE_AUTHOR(DRIVER_AUTHOR); |
797 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
798 | MODULE_LICENSE("GPL"); |
799 | ||
800 | static int __init uss720_init(void) | |
801 | { | |
802 | int retval; | |
803 | retval = usb_register(&uss720_driver); | |
804 | if (retval) | |
805 | goto out; | |
806 | ||
1b29a375 GKH |
807 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
808 | DRIVER_DESC "\n"); | |
809 | printk(KERN_INFO KBUILD_MODNAME ": NOTE: this is a special purpose " | |
810 | "driver to allow nonstandard\n"); | |
811 | printk(KERN_INFO KBUILD_MODNAME ": protocols (eg. bitbang) over " | |
812 | "USS720 usb to parallel cables\n"); | |
813 | printk(KERN_INFO KBUILD_MODNAME ": If you just want to connect to a " | |
814 | "printer, use usblp instead\n"); | |
1da177e4 LT |
815 | out: |
816 | return retval; | |
817 | } | |
818 | ||
819 | static void __exit uss720_cleanup(void) | |
820 | { | |
821 | usb_deregister(&uss720_driver); | |
822 | } | |
823 | ||
824 | module_init(uss720_init); | |
825 | module_exit(uss720_cleanup); | |
826 | ||
827 | /* --------------------------------------------------------------------- */ |