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