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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; | |
9821aa9d | 78 | struct usb_ctrlrequest *dr; |
0f36163d | 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 | |
7a2d2810 | 88 | dev_dbg(&priv->usbdev->dev, "destroying priv datastructure\n"); |
0f36163d TS |
89 | usb_put_dev(priv->usbdev); |
90 | kfree(priv); | |
0f36163d TS |
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); | |
9821aa9d | 101 | kfree(rq->dr); |
0f36163d TS |
102 | spin_lock_irqsave(&priv->asynclock, flags); |
103 | list_del_init(&rq->asynclist); | |
104 | spin_unlock_irqrestore(&priv->asynclock, flags); | |
105 | kfree(rq); | |
106 | kref_put(&priv->ref_count, destroy_priv); | |
107 | } | |
108 | ||
109 | /* --------------------------------------------------------------------- */ | |
110 | ||
7d12e780 | 111 | static void async_complete(struct urb *urb) |
0f36163d TS |
112 | { |
113 | struct uss720_async_request *rq; | |
114 | struct parport *pp; | |
115 | struct parport_uss720_private *priv; | |
82210d37 | 116 | int status = urb->status; |
0f36163d TS |
117 | |
118 | rq = urb->context; | |
119 | priv = rq->priv; | |
120 | pp = priv->pp; | |
82210d37 | 121 | if (status) { |
d2b1ff71 GKH |
122 | dev_err(&urb->dev->dev, "async_complete: urb error %d\n", |
123 | status); | |
9821aa9d | 124 | } else if (rq->dr->bRequest == 3) { |
0f36163d | 125 | memcpy(priv->reg, rq->reg, sizeof(priv->reg)); |
1da177e4 | 126 | #if 0 |
5d31a6dc AS |
127 | dev_dbg(&priv->usbdev->dev, "async_complete regs %7ph\n", |
128 | priv->reg); | |
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 | 151 | return NULL; |
9821aa9d | 152 | rq = kzalloc(sizeof(struct uss720_async_request), mem_flags); |
c9220ba5 | 153 | if (!rq) |
0f36163d | 154 | return NULL; |
0f36163d TS |
155 | kref_init(&rq->ref_count); |
156 | INIT_LIST_HEAD(&rq->asynclist); | |
157 | init_completion(&rq->compl); | |
158 | kref_get(&priv->ref_count); | |
159 | rq->priv = priv; | |
160 | rq->urb = usb_alloc_urb(0, mem_flags); | |
161 | if (!rq->urb) { | |
162 | kref_put(&rq->ref_count, destroy_async); | |
0f36163d TS |
163 | return NULL; |
164 | } | |
9821aa9d JH |
165 | rq->dr = kmalloc(sizeof(*rq->dr), mem_flags); |
166 | if (!rq->dr) { | |
167 | kref_put(&rq->ref_count, destroy_async); | |
168 | return NULL; | |
169 | } | |
170 | rq->dr->bRequestType = requesttype; | |
171 | rq->dr->bRequest = request; | |
172 | rq->dr->wValue = cpu_to_le16(value); | |
173 | rq->dr->wIndex = cpu_to_le16(index); | |
174 | rq->dr->wLength = cpu_to_le16((request == 3) ? sizeof(rq->reg) : 0); | |
0f36163d | 175 | usb_fill_control_urb(rq->urb, usbdev, (requesttype & 0x80) ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0), |
9821aa9d | 176 | (unsigned char *)rq->dr, |
0f36163d TS |
177 | (request == 3) ? rq->reg : NULL, (request == 3) ? sizeof(rq->reg) : 0, async_complete, rq); |
178 | /* rq->urb->transfer_flags |= URB_ASYNC_UNLINK; */ | |
179 | spin_lock_irqsave(&priv->asynclock, flags); | |
180 | list_add_tail(&rq->asynclist, &priv->asynclist); | |
181 | spin_unlock_irqrestore(&priv->asynclock, flags); | |
adaa3c63 | 182 | kref_get(&rq->ref_count); |
0f36163d | 183 | ret = usb_submit_urb(rq->urb, mem_flags); |
adaa3c63 | 184 | if (!ret) |
0f36163d | 185 | return rq; |
adaa3c63 | 186 | destroy_async(&rq->ref_count); |
d2b1ff71 | 187 | dev_err(&usbdev->dev, "submit_async_request submit_urb failed with %d\n", ret); |
0f36163d TS |
188 | return NULL; |
189 | } | |
190 | ||
191 | static unsigned int kill_all_async_requests_priv(struct parport_uss720_private *priv) | |
192 | { | |
193 | struct uss720_async_request *rq; | |
194 | unsigned long flags; | |
195 | unsigned int ret = 0; | |
196 | ||
197 | spin_lock_irqsave(&priv->asynclock, flags); | |
198 | list_for_each_entry(rq, &priv->asynclist, asynclist) { | |
199 | usb_unlink_urb(rq->urb); | |
200 | ret++; | |
201 | } | |
202 | spin_unlock_irqrestore(&priv->asynclock, flags); | |
1da177e4 LT |
203 | return ret; |
204 | } | |
205 | ||
206 | /* --------------------------------------------------------------------- */ | |
207 | ||
55016f10 | 208 | static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val, gfp_t mem_flags) |
0f36163d TS |
209 | { |
210 | struct parport_uss720_private *priv; | |
211 | struct uss720_async_request *rq; | |
212 | static const unsigned char regindex[9] = { | |
213 | 4, 0, 1, 5, 5, 0, 2, 3, 6 | |
214 | }; | |
215 | int ret; | |
216 | ||
217 | if (!pp) | |
218 | return -EIO; | |
219 | priv = pp->private_data; | |
220 | rq = submit_async_request(priv, 3, 0xc0, ((unsigned int)reg) << 8, 0, mem_flags); | |
221 | if (!rq) { | |
d2b1ff71 GKH |
222 | dev_err(&priv->usbdev->dev, "get_1284_register(%u) failed", |
223 | (unsigned int)reg); | |
0f36163d TS |
224 | return -EIO; |
225 | } | |
226 | if (!val) { | |
227 | kref_put(&rq->ref_count, destroy_async); | |
228 | return 0; | |
229 | } | |
230 | if (wait_for_completion_timeout(&rq->compl, HZ)) { | |
231 | ret = rq->urb->status; | |
232 | *val = priv->reg[(reg >= 9) ? 0 : regindex[reg]]; | |
233 | if (ret) | |
3b6004f3 GKH |
234 | printk(KERN_WARNING "get_1284_register: " |
235 | "usb error %d\n", ret); | |
0f36163d TS |
236 | kref_put(&rq->ref_count, destroy_async); |
237 | return ret; | |
238 | } | |
3b6004f3 | 239 | printk(KERN_WARNING "get_1284_register timeout\n"); |
0f36163d TS |
240 | kill_all_async_requests_priv(priv); |
241 | return -EIO; | |
242 | } | |
243 | ||
55016f10 | 244 | static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val, gfp_t mem_flags) |
0f36163d TS |
245 | { |
246 | struct parport_uss720_private *priv; | |
247 | struct uss720_async_request *rq; | |
248 | ||
249 | if (!pp) | |
250 | return -EIO; | |
251 | priv = pp->private_data; | |
252 | rq = submit_async_request(priv, 4, 0x40, (((unsigned int)reg) << 8) | val, 0, mem_flags); | |
253 | if (!rq) { | |
d2b1ff71 GKH |
254 | dev_err(&priv->usbdev->dev, "set_1284_register(%u,%u) failed", |
255 | (unsigned int)reg, (unsigned int)val); | |
0f36163d TS |
256 | return -EIO; |
257 | } | |
258 | kref_put(&rq->ref_count, destroy_async); | |
259 | return 0; | |
260 | } | |
261 | ||
262 | /* --------------------------------------------------------------------- */ | |
263 | ||
1da177e4 LT |
264 | /* ECR modes */ |
265 | #define ECR_SPP 00 | |
266 | #define ECR_PS2 01 | |
267 | #define ECR_PPF 02 | |
268 | #define ECR_ECP 03 | |
269 | #define ECR_EPP 04 | |
270 | ||
271 | /* Safely change the mode bits in the ECR */ | |
272 | static int change_mode(struct parport *pp, int m) | |
273 | { | |
274 | struct parport_uss720_private *priv = pp->private_data; | |
275 | int mode; | |
0f36163d | 276 | __u8 reg; |
1da177e4 | 277 | |
0f36163d | 278 | if (get_1284_register(pp, 6, ®, GFP_KERNEL)) |
1da177e4 LT |
279 | return -EIO; |
280 | /* Bits <7:5> contain the mode. */ | |
281 | mode = (priv->reg[2] >> 5) & 0x7; | |
282 | if (mode == m) | |
283 | return 0; | |
284 | /* We have to go through mode 000 or 001 */ | |
285 | if (mode > ECR_PS2 && m > ECR_PS2) | |
286 | if (change_mode(pp, ECR_PS2)) | |
287 | return -EIO; | |
288 | ||
289 | if (m <= ECR_PS2 && !(priv->reg[1] & 0x20)) { | |
290 | /* This mode resets the FIFO, so we may | |
291 | * have to wait for it to drain first. */ | |
292 | unsigned long expire = jiffies + pp->physport->cad->timeout; | |
293 | switch (mode) { | |
294 | case ECR_PPF: /* Parallel Port FIFO mode */ | |
295 | case ECR_ECP: /* ECP Parallel Port mode */ | |
296 | /* Poll slowly. */ | |
297 | for (;;) { | |
0f36163d | 298 | if (get_1284_register(pp, 6, ®, GFP_KERNEL)) |
1da177e4 LT |
299 | return -EIO; |
300 | if (priv->reg[2] & 0x01) | |
301 | break; | |
302 | if (time_after_eq (jiffies, expire)) | |
303 | /* The FIFO is stuck. */ | |
304 | return -EBUSY; | |
305 | msleep_interruptible(10); | |
306 | if (signal_pending (current)) | |
307 | break; | |
308 | } | |
309 | } | |
310 | } | |
311 | /* Set the mode. */ | |
0f36163d TS |
312 | if (set_1284_register(pp, 6, m << 5, GFP_KERNEL)) |
313 | return -EIO; | |
314 | if (get_1284_register(pp, 6, ®, GFP_KERNEL)) | |
1da177e4 LT |
315 | return -EIO; |
316 | return 0; | |
317 | } | |
318 | ||
319 | /* | |
320 | * Clear TIMEOUT BIT in EPP MODE | |
321 | */ | |
322 | static int clear_epp_timeout(struct parport *pp) | |
323 | { | |
324 | unsigned char stat; | |
325 | ||
0f36163d | 326 | if (get_1284_register(pp, 1, &stat, GFP_KERNEL)) |
1da177e4 LT |
327 | return 1; |
328 | return stat & 1; | |
329 | } | |
330 | ||
331 | /* | |
332 | * Access functions. | |
333 | */ | |
334 | #if 0 | |
335 | static int uss720_irq(int usbstatus, void *buffer, int len, void *dev_id) | |
336 | { | |
337 | struct parport *pp = (struct parport *)dev_id; | |
338 | struct parport_uss720_private *priv = pp->private_data; | |
339 | ||
340 | if (usbstatus != 0 || len < 4 || !buffer) | |
341 | return 1; | |
342 | memcpy(priv->reg, buffer, 4); | |
343 | /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */ | |
344 | if (priv->reg[2] & priv->reg[1] & 0x10) | |
f230d101 | 345 | parport_generic_irq(pp); |
1da177e4 LT |
346 | return 1; |
347 | } | |
348 | #endif | |
349 | ||
350 | static void parport_uss720_write_data(struct parport *pp, unsigned char d) | |
351 | { | |
0f36163d | 352 | set_1284_register(pp, 0, d, GFP_KERNEL); |
1da177e4 LT |
353 | } |
354 | ||
355 | static unsigned char parport_uss720_read_data(struct parport *pp) | |
356 | { | |
357 | unsigned char ret; | |
358 | ||
0f36163d | 359 | if (get_1284_register(pp, 0, &ret, GFP_KERNEL)) |
1da177e4 LT |
360 | return 0; |
361 | return ret; | |
362 | } | |
363 | ||
364 | static void parport_uss720_write_control(struct parport *pp, unsigned char d) | |
365 | { | |
366 | struct parport_uss720_private *priv = pp->private_data; | |
367 | ||
368 | d = (d & 0xf) | (priv->reg[1] & 0xf0); | |
0f36163d | 369 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
370 | return; |
371 | priv->reg[1] = d; | |
372 | } | |
373 | ||
374 | static unsigned char parport_uss720_read_control(struct parport *pp) | |
375 | { | |
376 | struct parport_uss720_private *priv = pp->private_data; | |
377 | return priv->reg[1] & 0xf; /* Use soft copy */ | |
378 | } | |
379 | ||
380 | static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val) | |
381 | { | |
382 | struct parport_uss720_private *priv = pp->private_data; | |
383 | unsigned char d; | |
384 | ||
385 | mask &= 0x0f; | |
386 | val &= 0x0f; | |
387 | d = (priv->reg[1] & (~mask)) ^ val; | |
0f36163d | 388 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
389 | return 0; |
390 | priv->reg[1] = d; | |
391 | return d & 0xf; | |
392 | } | |
393 | ||
394 | static unsigned char parport_uss720_read_status(struct parport *pp) | |
395 | { | |
396 | unsigned char ret; | |
397 | ||
0f36163d | 398 | if (get_1284_register(pp, 1, &ret, GFP_KERNEL)) |
1da177e4 LT |
399 | return 0; |
400 | return ret & 0xf8; | |
401 | } | |
402 | ||
403 | static void parport_uss720_disable_irq(struct parport *pp) | |
404 | { | |
405 | struct parport_uss720_private *priv = pp->private_data; | |
406 | unsigned char d; | |
407 | ||
408 | d = priv->reg[1] & ~0x10; | |
0f36163d | 409 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
410 | return; |
411 | priv->reg[1] = d; | |
412 | } | |
413 | ||
414 | static void parport_uss720_enable_irq(struct parport *pp) | |
415 | { | |
416 | struct parport_uss720_private *priv = pp->private_data; | |
417 | unsigned char d; | |
418 | ||
419 | d = priv->reg[1] | 0x10; | |
0f36163d | 420 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
421 | return; |
422 | priv->reg[1] = d; | |
423 | } | |
424 | ||
425 | static void parport_uss720_data_forward (struct parport *pp) | |
426 | { | |
427 | struct parport_uss720_private *priv = pp->private_data; | |
428 | unsigned char d; | |
429 | ||
430 | d = priv->reg[1] & ~0x20; | |
0f36163d | 431 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
432 | return; |
433 | priv->reg[1] = d; | |
434 | } | |
435 | ||
436 | static void parport_uss720_data_reverse (struct parport *pp) | |
437 | { | |
438 | struct parport_uss720_private *priv = pp->private_data; | |
439 | unsigned char d; | |
440 | ||
441 | d = priv->reg[1] | 0x20; | |
0f36163d | 442 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
443 | return; |
444 | priv->reg[1] = d; | |
445 | } | |
446 | ||
447 | static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s) | |
448 | { | |
449 | s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0); | |
450 | s->u.pc.ecr = 0x24; | |
451 | } | |
452 | ||
453 | static void parport_uss720_save_state(struct parport *pp, struct parport_state *s) | |
454 | { | |
455 | struct parport_uss720_private *priv = pp->private_data; | |
456 | ||
0f36163d TS |
457 | #if 0 |
458 | if (get_1284_register(pp, 2, NULL, GFP_ATOMIC)) | |
1da177e4 | 459 | return; |
0f36163d | 460 | #endif |
1da177e4 LT |
461 | s->u.pc.ctr = priv->reg[1]; |
462 | s->u.pc.ecr = priv->reg[2]; | |
463 | } | |
464 | ||
465 | static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s) | |
466 | { | |
0f36163d TS |
467 | struct parport_uss720_private *priv = pp->private_data; |
468 | ||
469 | set_1284_register(pp, 2, s->u.pc.ctr, GFP_ATOMIC); | |
470 | set_1284_register(pp, 6, s->u.pc.ecr, GFP_ATOMIC); | |
471 | get_1284_register(pp, 2, NULL, GFP_ATOMIC); | |
472 | priv->reg[1] = s->u.pc.ctr; | |
473 | priv->reg[2] = s->u.pc.ecr; | |
1da177e4 LT |
474 | } |
475 | ||
476 | static size_t parport_uss720_epp_read_data(struct parport *pp, void *buf, size_t length, int flags) | |
477 | { | |
478 | struct parport_uss720_private *priv = pp->private_data; | |
479 | size_t got = 0; | |
480 | ||
481 | if (change_mode(pp, ECR_EPP)) | |
482 | return 0; | |
483 | for (; got < length; got++) { | |
0f36163d | 484 | if (get_1284_register(pp, 4, (char *)buf, GFP_KERNEL)) |
1da177e4 LT |
485 | break; |
486 | buf++; | |
487 | if (priv->reg[0] & 0x01) { | |
488 | clear_epp_timeout(pp); | |
489 | break; | |
490 | } | |
491 | } | |
492 | change_mode(pp, ECR_PS2); | |
493 | return got; | |
494 | } | |
495 | ||
496 | static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf, size_t length, int flags) | |
497 | { | |
498 | #if 0 | |
499 | struct parport_uss720_private *priv = pp->private_data; | |
500 | size_t written = 0; | |
501 | ||
502 | if (change_mode(pp, ECR_EPP)) | |
503 | return 0; | |
504 | for (; written < length; written++) { | |
0f36163d | 505 | if (set_1284_register(pp, 4, (char *)buf, GFP_KERNEL)) |
1da177e4 LT |
506 | break; |
507 | ((char*)buf)++; | |
0f36163d | 508 | if (get_1284_register(pp, 1, NULL, GFP_KERNEL)) |
1da177e4 LT |
509 | break; |
510 | if (priv->reg[0] & 0x01) { | |
511 | clear_epp_timeout(pp); | |
512 | break; | |
513 | } | |
514 | } | |
515 | change_mode(pp, ECR_PS2); | |
516 | return written; | |
517 | #else | |
518 | struct parport_uss720_private *priv = pp->private_data; | |
519 | struct usb_device *usbdev = priv->usbdev; | |
520 | int rlen; | |
521 | int i; | |
522 | ||
523 | if (!usbdev) | |
524 | return 0; | |
525 | if (change_mode(pp, ECR_EPP)) | |
526 | return 0; | |
527 | i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buf, length, &rlen, 20000); | |
528 | if (i) | |
529 | printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buf, length, rlen); | |
530 | change_mode(pp, ECR_PS2); | |
531 | return rlen; | |
532 | #endif | |
533 | } | |
534 | ||
535 | static size_t parport_uss720_epp_read_addr(struct parport *pp, void *buf, size_t length, int flags) | |
536 | { | |
537 | struct parport_uss720_private *priv = pp->private_data; | |
538 | size_t got = 0; | |
539 | ||
540 | if (change_mode(pp, ECR_EPP)) | |
541 | return 0; | |
542 | for (; got < length; got++) { | |
0f36163d | 543 | if (get_1284_register(pp, 3, (char *)buf, GFP_KERNEL)) |
1da177e4 LT |
544 | break; |
545 | buf++; | |
546 | if (priv->reg[0] & 0x01) { | |
547 | clear_epp_timeout(pp); | |
548 | break; | |
549 | } | |
550 | } | |
551 | change_mode(pp, ECR_PS2); | |
552 | return got; | |
553 | } | |
554 | ||
555 | static size_t parport_uss720_epp_write_addr(struct parport *pp, const void *buf, size_t length, int flags) | |
556 | { | |
557 | struct parport_uss720_private *priv = pp->private_data; | |
558 | size_t written = 0; | |
559 | ||
560 | if (change_mode(pp, ECR_EPP)) | |
561 | return 0; | |
562 | for (; written < length; written++) { | |
0f36163d | 563 | if (set_1284_register(pp, 3, *(char *)buf, GFP_KERNEL)) |
1da177e4 LT |
564 | break; |
565 | buf++; | |
0f36163d | 566 | if (get_1284_register(pp, 1, NULL, GFP_KERNEL)) |
1da177e4 LT |
567 | break; |
568 | if (priv->reg[0] & 0x01) { | |
569 | clear_epp_timeout(pp); | |
570 | break; | |
571 | } | |
572 | } | |
573 | change_mode(pp, ECR_PS2); | |
574 | return written; | |
575 | } | |
576 | ||
577 | static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buffer, size_t len, int flags) | |
578 | { | |
579 | struct parport_uss720_private *priv = pp->private_data; | |
580 | struct usb_device *usbdev = priv->usbdev; | |
581 | int rlen; | |
582 | int i; | |
583 | ||
584 | if (!usbdev) | |
585 | return 0; | |
586 | if (change_mode(pp, ECR_ECP)) | |
587 | return 0; | |
588 | i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000); | |
589 | if (i) | |
590 | printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen); | |
591 | change_mode(pp, ECR_PS2); | |
592 | return rlen; | |
593 | } | |
594 | ||
595 | static size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, size_t len, int flags) | |
596 | { | |
597 | struct parport_uss720_private *priv = pp->private_data; | |
598 | struct usb_device *usbdev = priv->usbdev; | |
599 | int rlen; | |
600 | int i; | |
601 | ||
602 | if (!usbdev) | |
603 | return 0; | |
604 | if (change_mode(pp, ECR_ECP)) | |
605 | return 0; | |
606 | i = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, 2), buffer, len, &rlen, 20000); | |
607 | if (i) | |
608 | printk(KERN_ERR "uss720: recvbulk ep 2 buf %p len %Zu rlen %u\n", buffer, len, rlen); | |
609 | change_mode(pp, ECR_PS2); | |
610 | return rlen; | |
611 | } | |
612 | ||
613 | static size_t parport_uss720_ecp_write_addr(struct parport *pp, const void *buffer, size_t len, int flags) | |
614 | { | |
615 | size_t written = 0; | |
616 | ||
617 | if (change_mode(pp, ECR_ECP)) | |
618 | return 0; | |
619 | for (; written < len; written++) { | |
0f36163d | 620 | if (set_1284_register(pp, 5, *(char *)buffer, GFP_KERNEL)) |
1da177e4 LT |
621 | break; |
622 | buffer++; | |
623 | } | |
624 | change_mode(pp, ECR_PS2); | |
625 | return written; | |
626 | } | |
627 | ||
628 | static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer, size_t len, int flags) | |
629 | { | |
630 | struct parport_uss720_private *priv = pp->private_data; | |
631 | struct usb_device *usbdev = priv->usbdev; | |
632 | int rlen; | |
633 | int i; | |
634 | ||
635 | if (!usbdev) | |
636 | return 0; | |
637 | if (change_mode(pp, ECR_PPF)) | |
638 | return 0; | |
639 | i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000); | |
640 | if (i) | |
641 | printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen); | |
642 | change_mode(pp, ECR_PS2); | |
643 | return rlen; | |
644 | } | |
645 | ||
646 | /* --------------------------------------------------------------------- */ | |
647 | ||
648 | static struct parport_operations parport_uss720_ops = | |
649 | { | |
650 | .owner = THIS_MODULE, | |
651 | .write_data = parport_uss720_write_data, | |
652 | .read_data = parport_uss720_read_data, | |
653 | ||
654 | .write_control = parport_uss720_write_control, | |
655 | .read_control = parport_uss720_read_control, | |
656 | .frob_control = parport_uss720_frob_control, | |
657 | ||
658 | .read_status = parport_uss720_read_status, | |
659 | ||
660 | .enable_irq = parport_uss720_enable_irq, | |
661 | .disable_irq = parport_uss720_disable_irq, | |
662 | ||
663 | .data_forward = parport_uss720_data_forward, | |
664 | .data_reverse = parport_uss720_data_reverse, | |
665 | ||
666 | .init_state = parport_uss720_init_state, | |
667 | .save_state = parport_uss720_save_state, | |
668 | .restore_state = parport_uss720_restore_state, | |
669 | ||
670 | .epp_write_data = parport_uss720_epp_write_data, | |
671 | .epp_read_data = parport_uss720_epp_read_data, | |
672 | .epp_write_addr = parport_uss720_epp_write_addr, | |
673 | .epp_read_addr = parport_uss720_epp_read_addr, | |
674 | ||
675 | .ecp_write_data = parport_uss720_ecp_write_data, | |
676 | .ecp_read_data = parport_uss720_ecp_read_data, | |
677 | .ecp_write_addr = parport_uss720_ecp_write_addr, | |
678 | ||
679 | .compat_write_data = parport_uss720_write_compat, | |
680 | .nibble_read_data = parport_ieee1284_read_nibble, | |
681 | .byte_read_data = parport_ieee1284_read_byte, | |
682 | }; | |
683 | ||
684 | /* --------------------------------------------------------------------- */ | |
685 | ||
686 | static int uss720_probe(struct usb_interface *intf, | |
687 | const struct usb_device_id *id) | |
688 | { | |
0f36163d | 689 | struct usb_device *usbdev = usb_get_dev(interface_to_usbdev(intf)); |
1da177e4 LT |
690 | struct usb_host_interface *interface; |
691 | struct usb_host_endpoint *endpoint; | |
692 | struct parport_uss720_private *priv; | |
693 | struct parport *pp; | |
0f36163d | 694 | unsigned char reg; |
1da177e4 LT |
695 | int i; |
696 | ||
7a2d2810 GKH |
697 | dev_dbg(&intf->dev, "probe: vendor id 0x%x, device id 0x%x\n", |
698 | le16_to_cpu(usbdev->descriptor.idVendor), | |
699 | le16_to_cpu(usbdev->descriptor.idProduct)); | |
1da177e4 LT |
700 | |
701 | /* our known interfaces have 3 alternate settings */ | |
0f36163d TS |
702 | if (intf->num_altsetting != 3) { |
703 | usb_put_dev(usbdev); | |
1da177e4 | 704 | return -ENODEV; |
0f36163d | 705 | } |
1da177e4 | 706 | i = usb_set_interface(usbdev, intf->altsetting->desc.bInterfaceNumber, 2); |
cf2fbdd2 | 707 | dev_dbg(&intf->dev, "set interface result %d\n", i); |
1da177e4 LT |
708 | |
709 | interface = intf->cur_altsetting; | |
710 | ||
c637ee67 JH |
711 | if (interface->desc.bNumEndpoints < 3) { |
712 | usb_put_dev(usbdev); | |
713 | return -ENODEV; | |
714 | } | |
715 | ||
1da177e4 LT |
716 | /* |
717 | * Allocate parport interface | |
718 | */ | |
adde04c6 GKH |
719 | priv = kzalloc(sizeof(struct parport_uss720_private), GFP_KERNEL); |
720 | if (!priv) { | |
0f36163d | 721 | usb_put_dev(usbdev); |
1da177e4 | 722 | return -ENOMEM; |
0f36163d TS |
723 | } |
724 | priv->pp = NULL; | |
725 | priv->usbdev = usbdev; | |
726 | kref_init(&priv->ref_count); | |
727 | spin_lock_init(&priv->asynclock); | |
728 | INIT_LIST_HEAD(&priv->asynclist); | |
adde04c6 GKH |
729 | pp = parport_register_port(0, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &parport_uss720_ops); |
730 | if (!pp) { | |
3b6004f3 | 731 | printk(KERN_WARNING "uss720: could not register parport\n"); |
1da177e4 LT |
732 | goto probe_abort; |
733 | } | |
734 | ||
0f36163d | 735 | priv->pp = pp; |
1da177e4 | 736 | pp->private_data = priv; |
1da177e4 LT |
737 | pp->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP | PARPORT_MODE_ECP | PARPORT_MODE_COMPAT; |
738 | ||
739 | /* set the USS720 control register to manual mode, no ECP compression, enable all ints */ | |
0f36163d TS |
740 | set_1284_register(pp, 7, 0x00, GFP_KERNEL); |
741 | set_1284_register(pp, 6, 0x30, GFP_KERNEL); /* PS/2 mode */ | |
742 | set_1284_register(pp, 2, 0x0c, GFP_KERNEL); | |
1da177e4 | 743 | /* debugging */ |
0f36163d | 744 | get_1284_register(pp, 0, ®, GFP_KERNEL); |
5d31a6dc | 745 | dev_dbg(&intf->dev, "reg: %7ph\n", priv->reg); |
1da177e4 LT |
746 | |
747 | endpoint = &interface->endpoint[2]; | |
7a2d2810 GKH |
748 | dev_dbg(&intf->dev, "epaddr %d interval %d\n", |
749 | endpoint->desc.bEndpointAddress, endpoint->desc.bInterval); | |
1da177e4 LT |
750 | parport_announce_port(pp); |
751 | ||
0f36163d | 752 | usb_set_intfdata(intf, pp); |
1da177e4 LT |
753 | return 0; |
754 | ||
1da177e4 | 755 | probe_abort: |
0f36163d TS |
756 | kill_all_async_requests_priv(priv); |
757 | kref_put(&priv->ref_count, destroy_priv); | |
1da177e4 LT |
758 | return -ENODEV; |
759 | } | |
760 | ||
761 | static void uss720_disconnect(struct usb_interface *intf) | |
762 | { | |
0f36163d | 763 | struct parport *pp = usb_get_intfdata(intf); |
1da177e4 | 764 | struct parport_uss720_private *priv; |
0f36163d | 765 | struct usb_device *usbdev; |
1da177e4 | 766 | |
7a2d2810 | 767 | dev_dbg(&intf->dev, "disconnect\n"); |
0f36163d | 768 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
769 | if (pp) { |
770 | priv = pp->private_data; | |
0f36163d | 771 | usbdev = priv->usbdev; |
1da177e4 | 772 | priv->usbdev = NULL; |
0f36163d | 773 | priv->pp = NULL; |
7a2d2810 | 774 | dev_dbg(&intf->dev, "parport_remove_port\n"); |
0f36163d | 775 | parport_remove_port(pp); |
1da177e4 | 776 | parport_put_port(pp); |
0f36163d TS |
777 | kill_all_async_requests_priv(priv); |
778 | kref_put(&priv->ref_count, destroy_priv); | |
1da177e4 | 779 | } |
7a2d2810 | 780 | dev_dbg(&intf->dev, "disconnect done\n"); |
1da177e4 LT |
781 | } |
782 | ||
783 | /* table of cables that work through this driver */ | |
33b9e162 | 784 | static const struct usb_device_id uss720_table[] = { |
1da177e4 LT |
785 | { USB_DEVICE(0x047e, 0x1001) }, |
786 | { USB_DEVICE(0x0557, 0x2001) }, | |
787 | { USB_DEVICE(0x0729, 0x1284) }, | |
788 | { USB_DEVICE(0x1293, 0x0002) }, | |
ecc1624a | 789 | { USB_DEVICE(0x050d, 0x0002) }, |
1da177e4 LT |
790 | { } /* Terminating entry */ |
791 | }; | |
792 | ||
793 | MODULE_DEVICE_TABLE (usb, uss720_table); | |
794 | ||
795 | ||
796 | static struct usb_driver uss720_driver = { | |
1da177e4 LT |
797 | .name = "uss720", |
798 | .probe = uss720_probe, | |
799 | .disconnect = uss720_disconnect, | |
800 | .id_table = uss720_table, | |
801 | }; | |
802 | ||
803 | /* --------------------------------------------------------------------- */ | |
804 | ||
0f36163d TS |
805 | MODULE_AUTHOR(DRIVER_AUTHOR); |
806 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
807 | MODULE_LICENSE("GPL"); |
808 | ||
809 | static int __init uss720_init(void) | |
810 | { | |
811 | int retval; | |
812 | retval = usb_register(&uss720_driver); | |
813 | if (retval) | |
814 | goto out; | |
815 | ||
1b29a375 GKH |
816 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
817 | DRIVER_DESC "\n"); | |
818 | printk(KERN_INFO KBUILD_MODNAME ": NOTE: this is a special purpose " | |
819 | "driver to allow nonstandard\n"); | |
820 | printk(KERN_INFO KBUILD_MODNAME ": protocols (eg. bitbang) over " | |
821 | "USS720 usb to parallel cables\n"); | |
822 | printk(KERN_INFO KBUILD_MODNAME ": If you just want to connect to a " | |
823 | "printer, use usblp instead\n"); | |
1da177e4 LT |
824 | out: |
825 | return retval; | |
826 | } | |
827 | ||
828 | static void __exit uss720_cleanup(void) | |
829 | { | |
830 | usb_deregister(&uss720_driver); | |
831 | } | |
832 | ||
833 | module_init(uss720_init); | |
834 | module_exit(uss720_cleanup); | |
835 | ||
836 | /* --------------------------------------------------------------------- */ |