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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> |
174cd4b1 | 53 | #include <linux/sched/signal.h> |
1da177e4 LT |
54 | |
55 | /* | |
56 | * Version Information | |
57 | */ | |
0f36163d TS |
58 | #define DRIVER_VERSION "v0.6" |
59 | #define DRIVER_AUTHOR "Thomas M. Sailer, t.sailer@alumni.ethz.ch" | |
1da177e4 LT |
60 | #define DRIVER_DESC "USB Parport Cable driver for Cables using the Lucent Technologies USS720 Chip" |
61 | ||
62 | /* --------------------------------------------------------------------- */ | |
63 | ||
64 | struct parport_uss720_private { | |
65 | struct usb_device *usbdev; | |
0f36163d TS |
66 | struct parport *pp; |
67 | struct kref ref_count; | |
68 | __u8 reg[7]; /* USB registers */ | |
69 | struct list_head asynclist; | |
70 | spinlock_t asynclock; | |
71 | }; | |
72 | ||
73 | struct uss720_async_request { | |
74 | struct parport_uss720_private *priv; | |
75 | struct kref ref_count; | |
76 | struct list_head asynclist; | |
77 | struct completion compl; | |
78 | struct urb *urb; | |
9821aa9d | 79 | struct usb_ctrlrequest *dr; |
0f36163d | 80 | __u8 reg[7]; |
1da177e4 LT |
81 | }; |
82 | ||
83 | /* --------------------------------------------------------------------- */ | |
84 | ||
0f36163d | 85 | static void destroy_priv(struct kref *kref) |
1da177e4 | 86 | { |
0f36163d | 87 | struct parport_uss720_private *priv = container_of(kref, struct parport_uss720_private, ref_count); |
1da177e4 | 88 | |
7a2d2810 | 89 | dev_dbg(&priv->usbdev->dev, "destroying priv datastructure\n"); |
0f36163d TS |
90 | usb_put_dev(priv->usbdev); |
91 | kfree(priv); | |
0f36163d TS |
92 | } |
93 | ||
94 | static void destroy_async(struct kref *kref) | |
95 | { | |
96 | struct uss720_async_request *rq = container_of(kref, struct uss720_async_request, ref_count); | |
97 | struct parport_uss720_private *priv = rq->priv; | |
98 | unsigned long flags; | |
99 | ||
100 | if (likely(rq->urb)) | |
101 | usb_free_urb(rq->urb); | |
9821aa9d | 102 | kfree(rq->dr); |
0f36163d TS |
103 | spin_lock_irqsave(&priv->asynclock, flags); |
104 | list_del_init(&rq->asynclist); | |
105 | spin_unlock_irqrestore(&priv->asynclock, flags); | |
106 | kfree(rq); | |
107 | kref_put(&priv->ref_count, destroy_priv); | |
108 | } | |
109 | ||
110 | /* --------------------------------------------------------------------- */ | |
111 | ||
7d12e780 | 112 | static void async_complete(struct urb *urb) |
0f36163d TS |
113 | { |
114 | struct uss720_async_request *rq; | |
115 | struct parport *pp; | |
116 | struct parport_uss720_private *priv; | |
82210d37 | 117 | int status = urb->status; |
0f36163d TS |
118 | |
119 | rq = urb->context; | |
120 | priv = rq->priv; | |
121 | pp = priv->pp; | |
82210d37 | 122 | if (status) { |
d2b1ff71 GKH |
123 | dev_err(&urb->dev->dev, "async_complete: urb error %d\n", |
124 | status); | |
9821aa9d | 125 | } else if (rq->dr->bRequest == 3) { |
0f36163d | 126 | memcpy(priv->reg, rq->reg, sizeof(priv->reg)); |
1da177e4 | 127 | #if 0 |
5d31a6dc AS |
128 | dev_dbg(&priv->usbdev->dev, "async_complete regs %7ph\n", |
129 | priv->reg); | |
1da177e4 LT |
130 | #endif |
131 | /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */ | |
0f36163d | 132 | if (rq->reg[2] & rq->reg[1] & 0x10 && pp) |
f230d101 | 133 | parport_generic_irq(pp); |
1da177e4 | 134 | } |
0f36163d TS |
135 | complete(&rq->compl); |
136 | kref_put(&rq->ref_count, destroy_async); | |
1da177e4 LT |
137 | } |
138 | ||
0f36163d TS |
139 | static struct uss720_async_request *submit_async_request(struct parport_uss720_private *priv, |
140 | __u8 request, __u8 requesttype, __u16 value, __u16 index, | |
55016f10 | 141 | gfp_t mem_flags) |
1da177e4 | 142 | { |
0f36163d TS |
143 | struct usb_device *usbdev; |
144 | struct uss720_async_request *rq; | |
145 | unsigned long flags; | |
1da177e4 LT |
146 | int ret; |
147 | ||
0f36163d TS |
148 | if (!priv) |
149 | return NULL; | |
150 | usbdev = priv->usbdev; | |
1da177e4 | 151 | if (!usbdev) |
0f36163d | 152 | return NULL; |
9821aa9d | 153 | rq = kzalloc(sizeof(struct uss720_async_request), mem_flags); |
c9220ba5 | 154 | if (!rq) |
0f36163d | 155 | return NULL; |
0f36163d TS |
156 | kref_init(&rq->ref_count); |
157 | INIT_LIST_HEAD(&rq->asynclist); | |
158 | init_completion(&rq->compl); | |
159 | kref_get(&priv->ref_count); | |
160 | rq->priv = priv; | |
161 | rq->urb = usb_alloc_urb(0, mem_flags); | |
162 | if (!rq->urb) { | |
163 | kref_put(&rq->ref_count, destroy_async); | |
0f36163d TS |
164 | return NULL; |
165 | } | |
9821aa9d JH |
166 | rq->dr = kmalloc(sizeof(*rq->dr), mem_flags); |
167 | if (!rq->dr) { | |
168 | kref_put(&rq->ref_count, destroy_async); | |
169 | return NULL; | |
170 | } | |
171 | rq->dr->bRequestType = requesttype; | |
172 | rq->dr->bRequest = request; | |
173 | rq->dr->wValue = cpu_to_le16(value); | |
174 | rq->dr->wIndex = cpu_to_le16(index); | |
175 | rq->dr->wLength = cpu_to_le16((request == 3) ? sizeof(rq->reg) : 0); | |
0f36163d | 176 | usb_fill_control_urb(rq->urb, usbdev, (requesttype & 0x80) ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0), |
9821aa9d | 177 | (unsigned char *)rq->dr, |
0f36163d TS |
178 | (request == 3) ? rq->reg : NULL, (request == 3) ? sizeof(rq->reg) : 0, async_complete, rq); |
179 | /* rq->urb->transfer_flags |= URB_ASYNC_UNLINK; */ | |
180 | spin_lock_irqsave(&priv->asynclock, flags); | |
181 | list_add_tail(&rq->asynclist, &priv->asynclist); | |
182 | spin_unlock_irqrestore(&priv->asynclock, flags); | |
adaa3c63 | 183 | kref_get(&rq->ref_count); |
0f36163d | 184 | ret = usb_submit_urb(rq->urb, mem_flags); |
adaa3c63 | 185 | if (!ret) |
0f36163d | 186 | return rq; |
adaa3c63 | 187 | destroy_async(&rq->ref_count); |
d2b1ff71 | 188 | dev_err(&usbdev->dev, "submit_async_request submit_urb failed with %d\n", ret); |
0f36163d TS |
189 | return NULL; |
190 | } | |
191 | ||
192 | static unsigned int kill_all_async_requests_priv(struct parport_uss720_private *priv) | |
193 | { | |
194 | struct uss720_async_request *rq; | |
195 | unsigned long flags; | |
196 | unsigned int ret = 0; | |
197 | ||
198 | spin_lock_irqsave(&priv->asynclock, flags); | |
199 | list_for_each_entry(rq, &priv->asynclist, asynclist) { | |
200 | usb_unlink_urb(rq->urb); | |
201 | ret++; | |
202 | } | |
203 | spin_unlock_irqrestore(&priv->asynclock, flags); | |
1da177e4 LT |
204 | return ret; |
205 | } | |
206 | ||
207 | /* --------------------------------------------------------------------- */ | |
208 | ||
55016f10 | 209 | static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val, gfp_t mem_flags) |
0f36163d TS |
210 | { |
211 | struct parport_uss720_private *priv; | |
212 | struct uss720_async_request *rq; | |
213 | static const unsigned char regindex[9] = { | |
214 | 4, 0, 1, 5, 5, 0, 2, 3, 6 | |
215 | }; | |
216 | int ret; | |
217 | ||
218 | if (!pp) | |
219 | return -EIO; | |
220 | priv = pp->private_data; | |
221 | rq = submit_async_request(priv, 3, 0xc0, ((unsigned int)reg) << 8, 0, mem_flags); | |
222 | if (!rq) { | |
d2b1ff71 GKH |
223 | dev_err(&priv->usbdev->dev, "get_1284_register(%u) failed", |
224 | (unsigned int)reg); | |
0f36163d TS |
225 | return -EIO; |
226 | } | |
227 | if (!val) { | |
228 | kref_put(&rq->ref_count, destroy_async); | |
229 | return 0; | |
230 | } | |
231 | if (wait_for_completion_timeout(&rq->compl, HZ)) { | |
232 | ret = rq->urb->status; | |
233 | *val = priv->reg[(reg >= 9) ? 0 : regindex[reg]]; | |
234 | if (ret) | |
3b6004f3 GKH |
235 | printk(KERN_WARNING "get_1284_register: " |
236 | "usb error %d\n", ret); | |
0f36163d TS |
237 | kref_put(&rq->ref_count, destroy_async); |
238 | return ret; | |
239 | } | |
3b6004f3 | 240 | printk(KERN_WARNING "get_1284_register timeout\n"); |
0f36163d TS |
241 | kill_all_async_requests_priv(priv); |
242 | return -EIO; | |
243 | } | |
244 | ||
55016f10 | 245 | static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val, gfp_t mem_flags) |
0f36163d TS |
246 | { |
247 | struct parport_uss720_private *priv; | |
248 | struct uss720_async_request *rq; | |
249 | ||
250 | if (!pp) | |
251 | return -EIO; | |
252 | priv = pp->private_data; | |
253 | rq = submit_async_request(priv, 4, 0x40, (((unsigned int)reg) << 8) | val, 0, mem_flags); | |
254 | if (!rq) { | |
d2b1ff71 GKH |
255 | dev_err(&priv->usbdev->dev, "set_1284_register(%u,%u) failed", |
256 | (unsigned int)reg, (unsigned int)val); | |
0f36163d TS |
257 | return -EIO; |
258 | } | |
259 | kref_put(&rq->ref_count, destroy_async); | |
260 | return 0; | |
261 | } | |
262 | ||
263 | /* --------------------------------------------------------------------- */ | |
264 | ||
1da177e4 LT |
265 | /* ECR modes */ |
266 | #define ECR_SPP 00 | |
267 | #define ECR_PS2 01 | |
268 | #define ECR_PPF 02 | |
269 | #define ECR_ECP 03 | |
270 | #define ECR_EPP 04 | |
271 | ||
272 | /* Safely change the mode bits in the ECR */ | |
273 | static int change_mode(struct parport *pp, int m) | |
274 | { | |
275 | struct parport_uss720_private *priv = pp->private_data; | |
276 | int mode; | |
0f36163d | 277 | __u8 reg; |
1da177e4 | 278 | |
0f36163d | 279 | if (get_1284_register(pp, 6, ®, GFP_KERNEL)) |
1da177e4 LT |
280 | return -EIO; |
281 | /* Bits <7:5> contain the mode. */ | |
282 | mode = (priv->reg[2] >> 5) & 0x7; | |
283 | if (mode == m) | |
284 | return 0; | |
285 | /* We have to go through mode 000 or 001 */ | |
286 | if (mode > ECR_PS2 && m > ECR_PS2) | |
287 | if (change_mode(pp, ECR_PS2)) | |
288 | return -EIO; | |
289 | ||
290 | if (m <= ECR_PS2 && !(priv->reg[1] & 0x20)) { | |
291 | /* This mode resets the FIFO, so we may | |
292 | * have to wait for it to drain first. */ | |
293 | unsigned long expire = jiffies + pp->physport->cad->timeout; | |
294 | switch (mode) { | |
295 | case ECR_PPF: /* Parallel Port FIFO mode */ | |
296 | case ECR_ECP: /* ECP Parallel Port mode */ | |
297 | /* Poll slowly. */ | |
298 | for (;;) { | |
0f36163d | 299 | if (get_1284_register(pp, 6, ®, GFP_KERNEL)) |
1da177e4 LT |
300 | return -EIO; |
301 | if (priv->reg[2] & 0x01) | |
302 | break; | |
303 | if (time_after_eq (jiffies, expire)) | |
304 | /* The FIFO is stuck. */ | |
305 | return -EBUSY; | |
306 | msleep_interruptible(10); | |
307 | if (signal_pending (current)) | |
308 | break; | |
309 | } | |
310 | } | |
311 | } | |
312 | /* Set the mode. */ | |
0f36163d TS |
313 | if (set_1284_register(pp, 6, m << 5, GFP_KERNEL)) |
314 | return -EIO; | |
315 | if (get_1284_register(pp, 6, ®, GFP_KERNEL)) | |
1da177e4 LT |
316 | return -EIO; |
317 | return 0; | |
318 | } | |
319 | ||
320 | /* | |
321 | * Clear TIMEOUT BIT in EPP MODE | |
322 | */ | |
323 | static int clear_epp_timeout(struct parport *pp) | |
324 | { | |
325 | unsigned char stat; | |
326 | ||
0f36163d | 327 | if (get_1284_register(pp, 1, &stat, GFP_KERNEL)) |
1da177e4 LT |
328 | return 1; |
329 | return stat & 1; | |
330 | } | |
331 | ||
332 | /* | |
333 | * Access functions. | |
334 | */ | |
335 | #if 0 | |
336 | static int uss720_irq(int usbstatus, void *buffer, int len, void *dev_id) | |
337 | { | |
338 | struct parport *pp = (struct parport *)dev_id; | |
339 | struct parport_uss720_private *priv = pp->private_data; | |
340 | ||
341 | if (usbstatus != 0 || len < 4 || !buffer) | |
342 | return 1; | |
343 | memcpy(priv->reg, buffer, 4); | |
344 | /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */ | |
345 | if (priv->reg[2] & priv->reg[1] & 0x10) | |
f230d101 | 346 | parport_generic_irq(pp); |
1da177e4 LT |
347 | return 1; |
348 | } | |
349 | #endif | |
350 | ||
351 | static void parport_uss720_write_data(struct parport *pp, unsigned char d) | |
352 | { | |
0f36163d | 353 | set_1284_register(pp, 0, d, GFP_KERNEL); |
1da177e4 LT |
354 | } |
355 | ||
356 | static unsigned char parport_uss720_read_data(struct parport *pp) | |
357 | { | |
358 | unsigned char ret; | |
359 | ||
0f36163d | 360 | if (get_1284_register(pp, 0, &ret, GFP_KERNEL)) |
1da177e4 LT |
361 | return 0; |
362 | return ret; | |
363 | } | |
364 | ||
365 | static void parport_uss720_write_control(struct parport *pp, unsigned char d) | |
366 | { | |
367 | struct parport_uss720_private *priv = pp->private_data; | |
368 | ||
369 | d = (d & 0xf) | (priv->reg[1] & 0xf0); | |
0f36163d | 370 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
371 | return; |
372 | priv->reg[1] = d; | |
373 | } | |
374 | ||
375 | static unsigned char parport_uss720_read_control(struct parport *pp) | |
376 | { | |
377 | struct parport_uss720_private *priv = pp->private_data; | |
378 | return priv->reg[1] & 0xf; /* Use soft copy */ | |
379 | } | |
380 | ||
381 | static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val) | |
382 | { | |
383 | struct parport_uss720_private *priv = pp->private_data; | |
384 | unsigned char d; | |
385 | ||
386 | mask &= 0x0f; | |
387 | val &= 0x0f; | |
388 | d = (priv->reg[1] & (~mask)) ^ val; | |
0f36163d | 389 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
390 | return 0; |
391 | priv->reg[1] = d; | |
392 | return d & 0xf; | |
393 | } | |
394 | ||
395 | static unsigned char parport_uss720_read_status(struct parport *pp) | |
396 | { | |
397 | unsigned char ret; | |
398 | ||
0f36163d | 399 | if (get_1284_register(pp, 1, &ret, GFP_KERNEL)) |
1da177e4 LT |
400 | return 0; |
401 | return ret & 0xf8; | |
402 | } | |
403 | ||
404 | static void parport_uss720_disable_irq(struct parport *pp) | |
405 | { | |
406 | struct parport_uss720_private *priv = pp->private_data; | |
407 | unsigned char d; | |
408 | ||
409 | d = priv->reg[1] & ~0x10; | |
0f36163d | 410 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
411 | return; |
412 | priv->reg[1] = d; | |
413 | } | |
414 | ||
415 | static void parport_uss720_enable_irq(struct parport *pp) | |
416 | { | |
417 | struct parport_uss720_private *priv = pp->private_data; | |
418 | unsigned char d; | |
419 | ||
420 | d = priv->reg[1] | 0x10; | |
0f36163d | 421 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
422 | return; |
423 | priv->reg[1] = d; | |
424 | } | |
425 | ||
426 | static void parport_uss720_data_forward (struct parport *pp) | |
427 | { | |
428 | struct parport_uss720_private *priv = pp->private_data; | |
429 | unsigned char d; | |
430 | ||
431 | d = priv->reg[1] & ~0x20; | |
0f36163d | 432 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
433 | return; |
434 | priv->reg[1] = d; | |
435 | } | |
436 | ||
437 | static void parport_uss720_data_reverse (struct parport *pp) | |
438 | { | |
439 | struct parport_uss720_private *priv = pp->private_data; | |
440 | unsigned char d; | |
441 | ||
442 | d = priv->reg[1] | 0x20; | |
0f36163d | 443 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
444 | return; |
445 | priv->reg[1] = d; | |
446 | } | |
447 | ||
448 | static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s) | |
449 | { | |
450 | s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0); | |
451 | s->u.pc.ecr = 0x24; | |
452 | } | |
453 | ||
454 | static void parport_uss720_save_state(struct parport *pp, struct parport_state *s) | |
455 | { | |
456 | struct parport_uss720_private *priv = pp->private_data; | |
457 | ||
0f36163d TS |
458 | #if 0 |
459 | if (get_1284_register(pp, 2, NULL, GFP_ATOMIC)) | |
1da177e4 | 460 | return; |
0f36163d | 461 | #endif |
1da177e4 LT |
462 | s->u.pc.ctr = priv->reg[1]; |
463 | s->u.pc.ecr = priv->reg[2]; | |
464 | } | |
465 | ||
466 | static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s) | |
467 | { | |
0f36163d TS |
468 | struct parport_uss720_private *priv = pp->private_data; |
469 | ||
470 | set_1284_register(pp, 2, s->u.pc.ctr, GFP_ATOMIC); | |
471 | set_1284_register(pp, 6, s->u.pc.ecr, GFP_ATOMIC); | |
472 | get_1284_register(pp, 2, NULL, GFP_ATOMIC); | |
473 | priv->reg[1] = s->u.pc.ctr; | |
474 | priv->reg[2] = s->u.pc.ecr; | |
1da177e4 LT |
475 | } |
476 | ||
477 | static size_t parport_uss720_epp_read_data(struct parport *pp, void *buf, size_t length, int flags) | |
478 | { | |
479 | struct parport_uss720_private *priv = pp->private_data; | |
480 | size_t got = 0; | |
481 | ||
482 | if (change_mode(pp, ECR_EPP)) | |
483 | return 0; | |
484 | for (; got < length; got++) { | |
0f36163d | 485 | if (get_1284_register(pp, 4, (char *)buf, GFP_KERNEL)) |
1da177e4 LT |
486 | break; |
487 | buf++; | |
488 | if (priv->reg[0] & 0x01) { | |
489 | clear_epp_timeout(pp); | |
490 | break; | |
491 | } | |
492 | } | |
493 | change_mode(pp, ECR_PS2); | |
494 | return got; | |
495 | } | |
496 | ||
497 | static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf, size_t length, int flags) | |
498 | { | |
499 | #if 0 | |
500 | struct parport_uss720_private *priv = pp->private_data; | |
501 | size_t written = 0; | |
502 | ||
503 | if (change_mode(pp, ECR_EPP)) | |
504 | return 0; | |
505 | for (; written < length; written++) { | |
0f36163d | 506 | if (set_1284_register(pp, 4, (char *)buf, GFP_KERNEL)) |
1da177e4 LT |
507 | break; |
508 | ((char*)buf)++; | |
0f36163d | 509 | if (get_1284_register(pp, 1, NULL, GFP_KERNEL)) |
1da177e4 LT |
510 | break; |
511 | if (priv->reg[0] & 0x01) { | |
512 | clear_epp_timeout(pp); | |
513 | break; | |
514 | } | |
515 | } | |
516 | change_mode(pp, ECR_PS2); | |
517 | return written; | |
518 | #else | |
519 | struct parport_uss720_private *priv = pp->private_data; | |
520 | struct usb_device *usbdev = priv->usbdev; | |
521 | int rlen; | |
522 | int i; | |
523 | ||
524 | if (!usbdev) | |
525 | return 0; | |
526 | if (change_mode(pp, ECR_EPP)) | |
527 | return 0; | |
528 | i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buf, length, &rlen, 20000); | |
529 | if (i) | |
5b5e0928 | 530 | printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %zu rlen %u\n", buf, length, rlen); |
1da177e4 LT |
531 | change_mode(pp, ECR_PS2); |
532 | return rlen; | |
533 | #endif | |
534 | } | |
535 | ||
536 | static size_t parport_uss720_epp_read_addr(struct parport *pp, void *buf, size_t length, int flags) | |
537 | { | |
538 | struct parport_uss720_private *priv = pp->private_data; | |
539 | size_t got = 0; | |
540 | ||
541 | if (change_mode(pp, ECR_EPP)) | |
542 | return 0; | |
543 | for (; got < length; got++) { | |
0f36163d | 544 | if (get_1284_register(pp, 3, (char *)buf, GFP_KERNEL)) |
1da177e4 LT |
545 | break; |
546 | buf++; | |
547 | if (priv->reg[0] & 0x01) { | |
548 | clear_epp_timeout(pp); | |
549 | break; | |
550 | } | |
551 | } | |
552 | change_mode(pp, ECR_PS2); | |
553 | return got; | |
554 | } | |
555 | ||
556 | static size_t parport_uss720_epp_write_addr(struct parport *pp, const void *buf, size_t length, int flags) | |
557 | { | |
558 | struct parport_uss720_private *priv = pp->private_data; | |
559 | size_t written = 0; | |
560 | ||
561 | if (change_mode(pp, ECR_EPP)) | |
562 | return 0; | |
563 | for (; written < length; written++) { | |
0f36163d | 564 | if (set_1284_register(pp, 3, *(char *)buf, GFP_KERNEL)) |
1da177e4 LT |
565 | break; |
566 | buf++; | |
0f36163d | 567 | if (get_1284_register(pp, 1, NULL, GFP_KERNEL)) |
1da177e4 LT |
568 | break; |
569 | if (priv->reg[0] & 0x01) { | |
570 | clear_epp_timeout(pp); | |
571 | break; | |
572 | } | |
573 | } | |
574 | change_mode(pp, ECR_PS2); | |
575 | return written; | |
576 | } | |
577 | ||
578 | static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buffer, size_t len, int flags) | |
579 | { | |
580 | struct parport_uss720_private *priv = pp->private_data; | |
581 | struct usb_device *usbdev = priv->usbdev; | |
582 | int rlen; | |
583 | int i; | |
584 | ||
585 | if (!usbdev) | |
586 | return 0; | |
587 | if (change_mode(pp, ECR_ECP)) | |
588 | return 0; | |
589 | i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000); | |
590 | if (i) | |
5b5e0928 | 591 | printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %zu rlen %u\n", buffer, len, rlen); |
1da177e4 LT |
592 | change_mode(pp, ECR_PS2); |
593 | return rlen; | |
594 | } | |
595 | ||
596 | static size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, size_t len, int flags) | |
597 | { | |
598 | struct parport_uss720_private *priv = pp->private_data; | |
599 | struct usb_device *usbdev = priv->usbdev; | |
600 | int rlen; | |
601 | int i; | |
602 | ||
603 | if (!usbdev) | |
604 | return 0; | |
605 | if (change_mode(pp, ECR_ECP)) | |
606 | return 0; | |
607 | i = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, 2), buffer, len, &rlen, 20000); | |
608 | if (i) | |
5b5e0928 | 609 | printk(KERN_ERR "uss720: recvbulk ep 2 buf %p len %zu rlen %u\n", buffer, len, rlen); |
1da177e4 LT |
610 | change_mode(pp, ECR_PS2); |
611 | return rlen; | |
612 | } | |
613 | ||
614 | static size_t parport_uss720_ecp_write_addr(struct parport *pp, const void *buffer, size_t len, int flags) | |
615 | { | |
616 | size_t written = 0; | |
617 | ||
618 | if (change_mode(pp, ECR_ECP)) | |
619 | return 0; | |
620 | for (; written < len; written++) { | |
0f36163d | 621 | if (set_1284_register(pp, 5, *(char *)buffer, GFP_KERNEL)) |
1da177e4 LT |
622 | break; |
623 | buffer++; | |
624 | } | |
625 | change_mode(pp, ECR_PS2); | |
626 | return written; | |
627 | } | |
628 | ||
629 | static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer, size_t len, int flags) | |
630 | { | |
631 | struct parport_uss720_private *priv = pp->private_data; | |
632 | struct usb_device *usbdev = priv->usbdev; | |
633 | int rlen; | |
634 | int i; | |
635 | ||
636 | if (!usbdev) | |
637 | return 0; | |
638 | if (change_mode(pp, ECR_PPF)) | |
639 | return 0; | |
640 | i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000); | |
641 | if (i) | |
5b5e0928 | 642 | printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %zu rlen %u\n", buffer, len, rlen); |
1da177e4 LT |
643 | change_mode(pp, ECR_PS2); |
644 | return rlen; | |
645 | } | |
646 | ||
647 | /* --------------------------------------------------------------------- */ | |
648 | ||
649 | static struct parport_operations parport_uss720_ops = | |
650 | { | |
651 | .owner = THIS_MODULE, | |
652 | .write_data = parport_uss720_write_data, | |
653 | .read_data = parport_uss720_read_data, | |
654 | ||
655 | .write_control = parport_uss720_write_control, | |
656 | .read_control = parport_uss720_read_control, | |
657 | .frob_control = parport_uss720_frob_control, | |
658 | ||
659 | .read_status = parport_uss720_read_status, | |
660 | ||
661 | .enable_irq = parport_uss720_enable_irq, | |
662 | .disable_irq = parport_uss720_disable_irq, | |
663 | ||
664 | .data_forward = parport_uss720_data_forward, | |
665 | .data_reverse = parport_uss720_data_reverse, | |
666 | ||
667 | .init_state = parport_uss720_init_state, | |
668 | .save_state = parport_uss720_save_state, | |
669 | .restore_state = parport_uss720_restore_state, | |
670 | ||
671 | .epp_write_data = parport_uss720_epp_write_data, | |
672 | .epp_read_data = parport_uss720_epp_read_data, | |
673 | .epp_write_addr = parport_uss720_epp_write_addr, | |
674 | .epp_read_addr = parport_uss720_epp_read_addr, | |
675 | ||
676 | .ecp_write_data = parport_uss720_ecp_write_data, | |
677 | .ecp_read_data = parport_uss720_ecp_read_data, | |
678 | .ecp_write_addr = parport_uss720_ecp_write_addr, | |
679 | ||
680 | .compat_write_data = parport_uss720_write_compat, | |
681 | .nibble_read_data = parport_ieee1284_read_nibble, | |
682 | .byte_read_data = parport_ieee1284_read_byte, | |
683 | }; | |
684 | ||
685 | /* --------------------------------------------------------------------- */ | |
686 | ||
687 | static int uss720_probe(struct usb_interface *intf, | |
688 | const struct usb_device_id *id) | |
689 | { | |
0f36163d | 690 | struct usb_device *usbdev = usb_get_dev(interface_to_usbdev(intf)); |
1da177e4 LT |
691 | struct usb_host_interface *interface; |
692 | struct usb_host_endpoint *endpoint; | |
693 | struct parport_uss720_private *priv; | |
694 | struct parport *pp; | |
0f36163d | 695 | unsigned char reg; |
1da177e4 LT |
696 | int i; |
697 | ||
7a2d2810 GKH |
698 | dev_dbg(&intf->dev, "probe: vendor id 0x%x, device id 0x%x\n", |
699 | le16_to_cpu(usbdev->descriptor.idVendor), | |
700 | le16_to_cpu(usbdev->descriptor.idProduct)); | |
1da177e4 LT |
701 | |
702 | /* our known interfaces have 3 alternate settings */ | |
0f36163d TS |
703 | if (intf->num_altsetting != 3) { |
704 | usb_put_dev(usbdev); | |
1da177e4 | 705 | return -ENODEV; |
0f36163d | 706 | } |
1da177e4 | 707 | i = usb_set_interface(usbdev, intf->altsetting->desc.bInterfaceNumber, 2); |
cf2fbdd2 | 708 | dev_dbg(&intf->dev, "set interface result %d\n", i); |
1da177e4 LT |
709 | |
710 | interface = intf->cur_altsetting; | |
711 | ||
f259ca3e JH |
712 | if (interface->desc.bNumEndpoints < 3) { |
713 | usb_put_dev(usbdev); | |
714 | return -ENODEV; | |
715 | } | |
716 | ||
1da177e4 LT |
717 | /* |
718 | * Allocate parport interface | |
719 | */ | |
adde04c6 GKH |
720 | priv = kzalloc(sizeof(struct parport_uss720_private), GFP_KERNEL); |
721 | if (!priv) { | |
0f36163d | 722 | usb_put_dev(usbdev); |
1da177e4 | 723 | return -ENOMEM; |
0f36163d TS |
724 | } |
725 | priv->pp = NULL; | |
726 | priv->usbdev = usbdev; | |
727 | kref_init(&priv->ref_count); | |
728 | spin_lock_init(&priv->asynclock); | |
729 | INIT_LIST_HEAD(&priv->asynclist); | |
adde04c6 GKH |
730 | pp = parport_register_port(0, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &parport_uss720_ops); |
731 | if (!pp) { | |
3b6004f3 | 732 | printk(KERN_WARNING "uss720: could not register parport\n"); |
1da177e4 LT |
733 | goto probe_abort; |
734 | } | |
735 | ||
0f36163d | 736 | priv->pp = pp; |
1da177e4 | 737 | pp->private_data = priv; |
1da177e4 LT |
738 | pp->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP | PARPORT_MODE_ECP | PARPORT_MODE_COMPAT; |
739 | ||
740 | /* set the USS720 control register to manual mode, no ECP compression, enable all ints */ | |
0f36163d TS |
741 | set_1284_register(pp, 7, 0x00, GFP_KERNEL); |
742 | set_1284_register(pp, 6, 0x30, GFP_KERNEL); /* PS/2 mode */ | |
743 | set_1284_register(pp, 2, 0x0c, GFP_KERNEL); | |
1da177e4 | 744 | /* debugging */ |
0f36163d | 745 | get_1284_register(pp, 0, ®, GFP_KERNEL); |
5d31a6dc | 746 | dev_dbg(&intf->dev, "reg: %7ph\n", priv->reg); |
1da177e4 LT |
747 | |
748 | endpoint = &interface->endpoint[2]; | |
7a2d2810 GKH |
749 | dev_dbg(&intf->dev, "epaddr %d interval %d\n", |
750 | endpoint->desc.bEndpointAddress, endpoint->desc.bInterval); | |
1da177e4 LT |
751 | parport_announce_port(pp); |
752 | ||
0f36163d | 753 | usb_set_intfdata(intf, pp); |
1da177e4 LT |
754 | return 0; |
755 | ||
1da177e4 | 756 | probe_abort: |
0f36163d TS |
757 | kill_all_async_requests_priv(priv); |
758 | kref_put(&priv->ref_count, destroy_priv); | |
1da177e4 LT |
759 | return -ENODEV; |
760 | } | |
761 | ||
762 | static void uss720_disconnect(struct usb_interface *intf) | |
763 | { | |
0f36163d | 764 | struct parport *pp = usb_get_intfdata(intf); |
1da177e4 | 765 | struct parport_uss720_private *priv; |
0f36163d | 766 | struct usb_device *usbdev; |
1da177e4 | 767 | |
7a2d2810 | 768 | dev_dbg(&intf->dev, "disconnect\n"); |
0f36163d | 769 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
770 | if (pp) { |
771 | priv = pp->private_data; | |
0f36163d | 772 | usbdev = priv->usbdev; |
1da177e4 | 773 | priv->usbdev = NULL; |
0f36163d | 774 | priv->pp = NULL; |
7a2d2810 | 775 | dev_dbg(&intf->dev, "parport_remove_port\n"); |
0f36163d | 776 | parport_remove_port(pp); |
1da177e4 | 777 | parport_put_port(pp); |
0f36163d TS |
778 | kill_all_async_requests_priv(priv); |
779 | kref_put(&priv->ref_count, destroy_priv); | |
1da177e4 | 780 | } |
7a2d2810 | 781 | dev_dbg(&intf->dev, "disconnect done\n"); |
1da177e4 LT |
782 | } |
783 | ||
784 | /* table of cables that work through this driver */ | |
33b9e162 | 785 | static const struct usb_device_id uss720_table[] = { |
1da177e4 LT |
786 | { USB_DEVICE(0x047e, 0x1001) }, |
787 | { USB_DEVICE(0x0557, 0x2001) }, | |
788 | { USB_DEVICE(0x0729, 0x1284) }, | |
789 | { USB_DEVICE(0x1293, 0x0002) }, | |
ecc1624a | 790 | { USB_DEVICE(0x050d, 0x0002) }, |
1da177e4 LT |
791 | { } /* Terminating entry */ |
792 | }; | |
793 | ||
794 | MODULE_DEVICE_TABLE (usb, uss720_table); | |
795 | ||
796 | ||
797 | static struct usb_driver uss720_driver = { | |
1da177e4 LT |
798 | .name = "uss720", |
799 | .probe = uss720_probe, | |
800 | .disconnect = uss720_disconnect, | |
801 | .id_table = uss720_table, | |
802 | }; | |
803 | ||
804 | /* --------------------------------------------------------------------- */ | |
805 | ||
0f36163d TS |
806 | MODULE_AUTHOR(DRIVER_AUTHOR); |
807 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
808 | MODULE_LICENSE("GPL"); |
809 | ||
810 | static int __init uss720_init(void) | |
811 | { | |
812 | int retval; | |
813 | retval = usb_register(&uss720_driver); | |
814 | if (retval) | |
815 | goto out; | |
816 | ||
1b29a375 GKH |
817 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
818 | DRIVER_DESC "\n"); | |
819 | printk(KERN_INFO KBUILD_MODNAME ": NOTE: this is a special purpose " | |
820 | "driver to allow nonstandard\n"); | |
821 | printk(KERN_INFO KBUILD_MODNAME ": protocols (eg. bitbang) over " | |
822 | "USS720 usb to parallel cables\n"); | |
823 | printk(KERN_INFO KBUILD_MODNAME ": If you just want to connect to a " | |
824 | "printer, use usblp instead\n"); | |
1da177e4 LT |
825 | out: |
826 | return retval; | |
827 | } | |
828 | ||
829 | static void __exit uss720_cleanup(void) | |
830 | { | |
831 | usb_deregister(&uss720_driver); | |
832 | } | |
833 | ||
834 | module_init(uss720_init); | |
835 | module_exit(uss720_cleanup); | |
836 | ||
837 | /* --------------------------------------------------------------------- */ |