Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1da177e4 LT |
2 | /*****************************************************************************/ |
3 | ||
4 | /* | |
5 | * uss720.c -- USS720 USB Parport Cable. | |
6 | * | |
ecc1624a | 7 | * Copyright (C) 1999, 2005, 2010 |
0f36163d | 8 | * Thomas Sailer (t.sailer@alumni.ethz.ch) |
1da177e4 | 9 | * |
1da177e4 LT |
10 | * Based on parport_pc.c |
11 | * | |
12 | * History: | |
0f36163d TS |
13 | * 0.1 04.08.1999 Created |
14 | * 0.2 07.08.1999 Some fixes mainly suggested by Tim Waugh | |
15 | * Interrupt handling currently disabled because | |
16 | * usb_request_irq crashes somewhere within ohci.c | |
17 | * for no apparent reason (that is for me, anyway) | |
18 | * ECP currently untested | |
19 | * 0.3 10.08.1999 fixing merge errors | |
20 | * 0.4 13.08.1999 Added Vendor/Product ID of Brad Hard's cable | |
21 | * 0.5 20.09.1999 usb_control_msg wrapper used | |
22 | * Nov01.2000 usb_device_table support by Adam J. Richter | |
23 | * 08.04.2001 Identify version on module load. gb | |
24 | * 0.6 02.09.2005 Fix "scheduling in interrupt" problem by making save/restore | |
25 | * context asynchronous | |
1da177e4 LT |
26 | * |
27 | */ | |
28 | ||
29 | /*****************************************************************************/ | |
30 | ||
31 | #include <linux/module.h> | |
32 | #include <linux/socket.h> | |
33 | #include <linux/parport.h> | |
34 | #include <linux/init.h> | |
35 | #include <linux/usb.h> | |
36 | #include <linux/delay.h> | |
0f36163d TS |
37 | #include <linux/completion.h> |
38 | #include <linux/kref.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
174cd4b1 | 40 | #include <linux/sched/signal.h> |
1da177e4 | 41 | |
0f36163d | 42 | #define DRIVER_AUTHOR "Thomas M. Sailer, t.sailer@alumni.ethz.ch" |
1da177e4 LT |
43 | #define DRIVER_DESC "USB Parport Cable driver for Cables using the Lucent Technologies USS720 Chip" |
44 | ||
45 | /* --------------------------------------------------------------------- */ | |
46 | ||
47 | struct parport_uss720_private { | |
48 | struct usb_device *usbdev; | |
0f36163d TS |
49 | struct parport *pp; |
50 | struct kref ref_count; | |
51 | __u8 reg[7]; /* USB registers */ | |
52 | struct list_head asynclist; | |
53 | spinlock_t asynclock; | |
54 | }; | |
55 | ||
56 | struct uss720_async_request { | |
57 | struct parport_uss720_private *priv; | |
58 | struct kref ref_count; | |
59 | struct list_head asynclist; | |
60 | struct completion compl; | |
61 | struct urb *urb; | |
9821aa9d | 62 | struct usb_ctrlrequest *dr; |
0f36163d | 63 | __u8 reg[7]; |
1da177e4 LT |
64 | }; |
65 | ||
66 | /* --------------------------------------------------------------------- */ | |
67 | ||
0f36163d | 68 | static void destroy_priv(struct kref *kref) |
1da177e4 | 69 | { |
0f36163d | 70 | struct parport_uss720_private *priv = container_of(kref, struct parport_uss720_private, ref_count); |
1da177e4 | 71 | |
7a2d2810 | 72 | dev_dbg(&priv->usbdev->dev, "destroying priv datastructure\n"); |
0f36163d TS |
73 | usb_put_dev(priv->usbdev); |
74 | kfree(priv); | |
0f36163d TS |
75 | } |
76 | ||
77 | static void destroy_async(struct kref *kref) | |
78 | { | |
79 | struct uss720_async_request *rq = container_of(kref, struct uss720_async_request, ref_count); | |
80 | struct parport_uss720_private *priv = rq->priv; | |
81 | unsigned long flags; | |
82 | ||
83 | if (likely(rq->urb)) | |
84 | usb_free_urb(rq->urb); | |
9821aa9d | 85 | kfree(rq->dr); |
0f36163d TS |
86 | spin_lock_irqsave(&priv->asynclock, flags); |
87 | list_del_init(&rq->asynclist); | |
88 | spin_unlock_irqrestore(&priv->asynclock, flags); | |
89 | kfree(rq); | |
90 | kref_put(&priv->ref_count, destroy_priv); | |
91 | } | |
92 | ||
93 | /* --------------------------------------------------------------------- */ | |
94 | ||
7d12e780 | 95 | static void async_complete(struct urb *urb) |
0f36163d TS |
96 | { |
97 | struct uss720_async_request *rq; | |
98 | struct parport *pp; | |
99 | struct parport_uss720_private *priv; | |
82210d37 | 100 | int status = urb->status; |
0f36163d TS |
101 | |
102 | rq = urb->context; | |
103 | priv = rq->priv; | |
104 | pp = priv->pp; | |
82210d37 | 105 | if (status) { |
d2b1ff71 GKH |
106 | dev_err(&urb->dev->dev, "async_complete: urb error %d\n", |
107 | status); | |
9821aa9d | 108 | } else if (rq->dr->bRequest == 3) { |
0f36163d | 109 | memcpy(priv->reg, rq->reg, sizeof(priv->reg)); |
1da177e4 | 110 | #if 0 |
5d31a6dc AS |
111 | dev_dbg(&priv->usbdev->dev, "async_complete regs %7ph\n", |
112 | priv->reg); | |
1da177e4 LT |
113 | #endif |
114 | /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */ | |
0f36163d | 115 | if (rq->reg[2] & rq->reg[1] & 0x10 && pp) |
f230d101 | 116 | parport_generic_irq(pp); |
1da177e4 | 117 | } |
0f36163d TS |
118 | complete(&rq->compl); |
119 | kref_put(&rq->ref_count, destroy_async); | |
1da177e4 LT |
120 | } |
121 | ||
0f36163d TS |
122 | static struct uss720_async_request *submit_async_request(struct parport_uss720_private *priv, |
123 | __u8 request, __u8 requesttype, __u16 value, __u16 index, | |
55016f10 | 124 | gfp_t mem_flags) |
1da177e4 | 125 | { |
0f36163d TS |
126 | struct usb_device *usbdev; |
127 | struct uss720_async_request *rq; | |
128 | unsigned long flags; | |
1da177e4 LT |
129 | int ret; |
130 | ||
0f36163d TS |
131 | if (!priv) |
132 | return NULL; | |
133 | usbdev = priv->usbdev; | |
1da177e4 | 134 | if (!usbdev) |
0f36163d | 135 | return NULL; |
9821aa9d | 136 | rq = kzalloc(sizeof(struct uss720_async_request), mem_flags); |
c9220ba5 | 137 | if (!rq) |
0f36163d | 138 | return NULL; |
0f36163d TS |
139 | kref_init(&rq->ref_count); |
140 | INIT_LIST_HEAD(&rq->asynclist); | |
141 | init_completion(&rq->compl); | |
142 | kref_get(&priv->ref_count); | |
143 | rq->priv = priv; | |
144 | rq->urb = usb_alloc_urb(0, mem_flags); | |
145 | if (!rq->urb) { | |
146 | kref_put(&rq->ref_count, destroy_async); | |
0f36163d TS |
147 | return NULL; |
148 | } | |
9821aa9d JH |
149 | rq->dr = kmalloc(sizeof(*rq->dr), mem_flags); |
150 | if (!rq->dr) { | |
151 | kref_put(&rq->ref_count, destroy_async); | |
152 | return NULL; | |
153 | } | |
154 | rq->dr->bRequestType = requesttype; | |
155 | rq->dr->bRequest = request; | |
156 | rq->dr->wValue = cpu_to_le16(value); | |
157 | rq->dr->wIndex = cpu_to_le16(index); | |
158 | rq->dr->wLength = cpu_to_le16((request == 3) ? sizeof(rq->reg) : 0); | |
0f36163d | 159 | usb_fill_control_urb(rq->urb, usbdev, (requesttype & 0x80) ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0), |
9821aa9d | 160 | (unsigned char *)rq->dr, |
0f36163d TS |
161 | (request == 3) ? rq->reg : NULL, (request == 3) ? sizeof(rq->reg) : 0, async_complete, rq); |
162 | /* rq->urb->transfer_flags |= URB_ASYNC_UNLINK; */ | |
163 | spin_lock_irqsave(&priv->asynclock, flags); | |
164 | list_add_tail(&rq->asynclist, &priv->asynclist); | |
165 | spin_unlock_irqrestore(&priv->asynclock, flags); | |
adaa3c63 | 166 | kref_get(&rq->ref_count); |
0f36163d | 167 | ret = usb_submit_urb(rq->urb, mem_flags); |
adaa3c63 | 168 | if (!ret) |
0f36163d | 169 | return rq; |
adaa3c63 | 170 | destroy_async(&rq->ref_count); |
d2b1ff71 | 171 | dev_err(&usbdev->dev, "submit_async_request submit_urb failed with %d\n", ret); |
0f36163d TS |
172 | return NULL; |
173 | } | |
174 | ||
175 | static unsigned int kill_all_async_requests_priv(struct parport_uss720_private *priv) | |
176 | { | |
177 | struct uss720_async_request *rq; | |
178 | unsigned long flags; | |
179 | unsigned int ret = 0; | |
180 | ||
181 | spin_lock_irqsave(&priv->asynclock, flags); | |
182 | list_for_each_entry(rq, &priv->asynclist, asynclist) { | |
183 | usb_unlink_urb(rq->urb); | |
184 | ret++; | |
185 | } | |
186 | spin_unlock_irqrestore(&priv->asynclock, flags); | |
1da177e4 LT |
187 | return ret; |
188 | } | |
189 | ||
190 | /* --------------------------------------------------------------------- */ | |
191 | ||
55016f10 | 192 | static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val, gfp_t mem_flags) |
0f36163d TS |
193 | { |
194 | struct parport_uss720_private *priv; | |
195 | struct uss720_async_request *rq; | |
196 | static const unsigned char regindex[9] = { | |
197 | 4, 0, 1, 5, 5, 0, 2, 3, 6 | |
198 | }; | |
199 | int ret; | |
200 | ||
201 | if (!pp) | |
202 | return -EIO; | |
203 | priv = pp->private_data; | |
204 | rq = submit_async_request(priv, 3, 0xc0, ((unsigned int)reg) << 8, 0, mem_flags); | |
205 | if (!rq) { | |
d2b1ff71 GKH |
206 | dev_err(&priv->usbdev->dev, "get_1284_register(%u) failed", |
207 | (unsigned int)reg); | |
0f36163d TS |
208 | return -EIO; |
209 | } | |
210 | if (!val) { | |
211 | kref_put(&rq->ref_count, destroy_async); | |
212 | return 0; | |
213 | } | |
214 | if (wait_for_completion_timeout(&rq->compl, HZ)) { | |
215 | ret = rq->urb->status; | |
216 | *val = priv->reg[(reg >= 9) ? 0 : regindex[reg]]; | |
217 | if (ret) | |
3b6004f3 GKH |
218 | printk(KERN_WARNING "get_1284_register: " |
219 | "usb error %d\n", ret); | |
0f36163d TS |
220 | kref_put(&rq->ref_count, destroy_async); |
221 | return ret; | |
222 | } | |
3b6004f3 | 223 | printk(KERN_WARNING "get_1284_register timeout\n"); |
0f36163d TS |
224 | kill_all_async_requests_priv(priv); |
225 | return -EIO; | |
226 | } | |
227 | ||
55016f10 | 228 | static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val, gfp_t mem_flags) |
0f36163d TS |
229 | { |
230 | struct parport_uss720_private *priv; | |
231 | struct uss720_async_request *rq; | |
232 | ||
233 | if (!pp) | |
234 | return -EIO; | |
235 | priv = pp->private_data; | |
236 | rq = submit_async_request(priv, 4, 0x40, (((unsigned int)reg) << 8) | val, 0, mem_flags); | |
237 | if (!rq) { | |
d2b1ff71 GKH |
238 | dev_err(&priv->usbdev->dev, "set_1284_register(%u,%u) failed", |
239 | (unsigned int)reg, (unsigned int)val); | |
0f36163d TS |
240 | return -EIO; |
241 | } | |
242 | kref_put(&rq->ref_count, destroy_async); | |
243 | return 0; | |
244 | } | |
245 | ||
246 | /* --------------------------------------------------------------------- */ | |
247 | ||
1da177e4 LT |
248 | /* ECR modes */ |
249 | #define ECR_SPP 00 | |
250 | #define ECR_PS2 01 | |
251 | #define ECR_PPF 02 | |
252 | #define ECR_ECP 03 | |
253 | #define ECR_EPP 04 | |
254 | ||
255 | /* Safely change the mode bits in the ECR */ | |
256 | static int change_mode(struct parport *pp, int m) | |
257 | { | |
258 | struct parport_uss720_private *priv = pp->private_data; | |
259 | int mode; | |
0f36163d | 260 | __u8 reg; |
1da177e4 | 261 | |
0f36163d | 262 | if (get_1284_register(pp, 6, ®, GFP_KERNEL)) |
1da177e4 LT |
263 | return -EIO; |
264 | /* Bits <7:5> contain the mode. */ | |
265 | mode = (priv->reg[2] >> 5) & 0x7; | |
266 | if (mode == m) | |
267 | return 0; | |
268 | /* We have to go through mode 000 or 001 */ | |
269 | if (mode > ECR_PS2 && m > ECR_PS2) | |
270 | if (change_mode(pp, ECR_PS2)) | |
271 | return -EIO; | |
272 | ||
273 | if (m <= ECR_PS2 && !(priv->reg[1] & 0x20)) { | |
274 | /* This mode resets the FIFO, so we may | |
275 | * have to wait for it to drain first. */ | |
276 | unsigned long expire = jiffies + pp->physport->cad->timeout; | |
277 | switch (mode) { | |
278 | case ECR_PPF: /* Parallel Port FIFO mode */ | |
279 | case ECR_ECP: /* ECP Parallel Port mode */ | |
280 | /* Poll slowly. */ | |
281 | for (;;) { | |
0f36163d | 282 | if (get_1284_register(pp, 6, ®, GFP_KERNEL)) |
1da177e4 LT |
283 | return -EIO; |
284 | if (priv->reg[2] & 0x01) | |
285 | break; | |
286 | if (time_after_eq (jiffies, expire)) | |
287 | /* The FIFO is stuck. */ | |
288 | return -EBUSY; | |
289 | msleep_interruptible(10); | |
290 | if (signal_pending (current)) | |
291 | break; | |
292 | } | |
293 | } | |
294 | } | |
295 | /* Set the mode. */ | |
0f36163d TS |
296 | if (set_1284_register(pp, 6, m << 5, GFP_KERNEL)) |
297 | return -EIO; | |
298 | if (get_1284_register(pp, 6, ®, GFP_KERNEL)) | |
1da177e4 LT |
299 | return -EIO; |
300 | return 0; | |
301 | } | |
302 | ||
303 | /* | |
304 | * Clear TIMEOUT BIT in EPP MODE | |
305 | */ | |
306 | static int clear_epp_timeout(struct parport *pp) | |
307 | { | |
308 | unsigned char stat; | |
309 | ||
0f36163d | 310 | if (get_1284_register(pp, 1, &stat, GFP_KERNEL)) |
1da177e4 LT |
311 | return 1; |
312 | return stat & 1; | |
313 | } | |
314 | ||
315 | /* | |
316 | * Access functions. | |
317 | */ | |
318 | #if 0 | |
319 | static int uss720_irq(int usbstatus, void *buffer, int len, void *dev_id) | |
320 | { | |
321 | struct parport *pp = (struct parport *)dev_id; | |
322 | struct parport_uss720_private *priv = pp->private_data; | |
323 | ||
324 | if (usbstatus != 0 || len < 4 || !buffer) | |
325 | return 1; | |
326 | memcpy(priv->reg, buffer, 4); | |
327 | /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */ | |
328 | if (priv->reg[2] & priv->reg[1] & 0x10) | |
f230d101 | 329 | parport_generic_irq(pp); |
1da177e4 LT |
330 | return 1; |
331 | } | |
332 | #endif | |
333 | ||
334 | static void parport_uss720_write_data(struct parport *pp, unsigned char d) | |
335 | { | |
0f36163d | 336 | set_1284_register(pp, 0, d, GFP_KERNEL); |
1da177e4 LT |
337 | } |
338 | ||
339 | static unsigned char parport_uss720_read_data(struct parport *pp) | |
340 | { | |
341 | unsigned char ret; | |
342 | ||
0f36163d | 343 | if (get_1284_register(pp, 0, &ret, GFP_KERNEL)) |
1da177e4 LT |
344 | return 0; |
345 | return ret; | |
346 | } | |
347 | ||
348 | static void parport_uss720_write_control(struct parport *pp, unsigned char d) | |
349 | { | |
350 | struct parport_uss720_private *priv = pp->private_data; | |
351 | ||
352 | d = (d & 0xf) | (priv->reg[1] & 0xf0); | |
0f36163d | 353 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
354 | return; |
355 | priv->reg[1] = d; | |
356 | } | |
357 | ||
358 | static unsigned char parport_uss720_read_control(struct parport *pp) | |
359 | { | |
360 | struct parport_uss720_private *priv = pp->private_data; | |
361 | return priv->reg[1] & 0xf; /* Use soft copy */ | |
362 | } | |
363 | ||
364 | static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val) | |
365 | { | |
366 | struct parport_uss720_private *priv = pp->private_data; | |
367 | unsigned char d; | |
368 | ||
369 | mask &= 0x0f; | |
370 | val &= 0x0f; | |
371 | d = (priv->reg[1] & (~mask)) ^ val; | |
0f36163d | 372 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
373 | return 0; |
374 | priv->reg[1] = d; | |
375 | return d & 0xf; | |
376 | } | |
377 | ||
378 | static unsigned char parport_uss720_read_status(struct parport *pp) | |
379 | { | |
380 | unsigned char ret; | |
381 | ||
0f36163d | 382 | if (get_1284_register(pp, 1, &ret, GFP_KERNEL)) |
1da177e4 LT |
383 | return 0; |
384 | return ret & 0xf8; | |
385 | } | |
386 | ||
387 | static void parport_uss720_disable_irq(struct parport *pp) | |
388 | { | |
389 | struct parport_uss720_private *priv = pp->private_data; | |
390 | unsigned char d; | |
391 | ||
392 | d = priv->reg[1] & ~0x10; | |
0f36163d | 393 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
394 | return; |
395 | priv->reg[1] = d; | |
396 | } | |
397 | ||
398 | static void parport_uss720_enable_irq(struct parport *pp) | |
399 | { | |
400 | struct parport_uss720_private *priv = pp->private_data; | |
401 | unsigned char d; | |
402 | ||
403 | d = priv->reg[1] | 0x10; | |
0f36163d | 404 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
405 | return; |
406 | priv->reg[1] = d; | |
407 | } | |
408 | ||
409 | static void parport_uss720_data_forward (struct parport *pp) | |
410 | { | |
411 | struct parport_uss720_private *priv = pp->private_data; | |
412 | unsigned char d; | |
413 | ||
414 | d = priv->reg[1] & ~0x20; | |
0f36163d | 415 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
416 | return; |
417 | priv->reg[1] = d; | |
418 | } | |
419 | ||
420 | static void parport_uss720_data_reverse (struct parport *pp) | |
421 | { | |
422 | struct parport_uss720_private *priv = pp->private_data; | |
423 | unsigned char d; | |
424 | ||
425 | d = priv->reg[1] | 0x20; | |
0f36163d | 426 | if (set_1284_register(pp, 2, d, GFP_KERNEL)) |
1da177e4 LT |
427 | return; |
428 | priv->reg[1] = d; | |
429 | } | |
430 | ||
431 | static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s) | |
432 | { | |
433 | s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0); | |
434 | s->u.pc.ecr = 0x24; | |
435 | } | |
436 | ||
437 | static void parport_uss720_save_state(struct parport *pp, struct parport_state *s) | |
438 | { | |
439 | struct parport_uss720_private *priv = pp->private_data; | |
440 | ||
0f36163d TS |
441 | #if 0 |
442 | if (get_1284_register(pp, 2, NULL, GFP_ATOMIC)) | |
1da177e4 | 443 | return; |
0f36163d | 444 | #endif |
1da177e4 LT |
445 | s->u.pc.ctr = priv->reg[1]; |
446 | s->u.pc.ecr = priv->reg[2]; | |
447 | } | |
448 | ||
449 | static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s) | |
450 | { | |
0f36163d TS |
451 | struct parport_uss720_private *priv = pp->private_data; |
452 | ||
453 | set_1284_register(pp, 2, s->u.pc.ctr, GFP_ATOMIC); | |
454 | set_1284_register(pp, 6, s->u.pc.ecr, GFP_ATOMIC); | |
455 | get_1284_register(pp, 2, NULL, GFP_ATOMIC); | |
456 | priv->reg[1] = s->u.pc.ctr; | |
457 | priv->reg[2] = s->u.pc.ecr; | |
1da177e4 LT |
458 | } |
459 | ||
460 | static size_t parport_uss720_epp_read_data(struct parport *pp, void *buf, size_t length, int flags) | |
461 | { | |
462 | struct parport_uss720_private *priv = pp->private_data; | |
463 | size_t got = 0; | |
464 | ||
465 | if (change_mode(pp, ECR_EPP)) | |
466 | return 0; | |
467 | for (; got < length; got++) { | |
0f36163d | 468 | if (get_1284_register(pp, 4, (char *)buf, GFP_KERNEL)) |
1da177e4 LT |
469 | break; |
470 | buf++; | |
471 | if (priv->reg[0] & 0x01) { | |
472 | clear_epp_timeout(pp); | |
473 | break; | |
474 | } | |
475 | } | |
476 | change_mode(pp, ECR_PS2); | |
477 | return got; | |
478 | } | |
479 | ||
480 | static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf, size_t length, int flags) | |
481 | { | |
482 | #if 0 | |
483 | struct parport_uss720_private *priv = pp->private_data; | |
484 | size_t written = 0; | |
485 | ||
486 | if (change_mode(pp, ECR_EPP)) | |
487 | return 0; | |
488 | for (; written < length; written++) { | |
0f36163d | 489 | if (set_1284_register(pp, 4, (char *)buf, GFP_KERNEL)) |
1da177e4 LT |
490 | break; |
491 | ((char*)buf)++; | |
0f36163d | 492 | if (get_1284_register(pp, 1, NULL, GFP_KERNEL)) |
1da177e4 LT |
493 | break; |
494 | if (priv->reg[0] & 0x01) { | |
495 | clear_epp_timeout(pp); | |
496 | break; | |
497 | } | |
498 | } | |
499 | change_mode(pp, ECR_PS2); | |
500 | return written; | |
501 | #else | |
502 | struct parport_uss720_private *priv = pp->private_data; | |
503 | struct usb_device *usbdev = priv->usbdev; | |
504 | int rlen; | |
505 | int i; | |
506 | ||
507 | if (!usbdev) | |
508 | return 0; | |
509 | if (change_mode(pp, ECR_EPP)) | |
510 | return 0; | |
511 | i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buf, length, &rlen, 20000); | |
512 | if (i) | |
5b5e0928 | 513 | printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %zu rlen %u\n", buf, length, rlen); |
1da177e4 LT |
514 | change_mode(pp, ECR_PS2); |
515 | return rlen; | |
516 | #endif | |
517 | } | |
518 | ||
519 | static size_t parport_uss720_epp_read_addr(struct parport *pp, void *buf, size_t length, int flags) | |
520 | { | |
521 | struct parport_uss720_private *priv = pp->private_data; | |
522 | size_t got = 0; | |
523 | ||
524 | if (change_mode(pp, ECR_EPP)) | |
525 | return 0; | |
526 | for (; got < length; got++) { | |
0f36163d | 527 | if (get_1284_register(pp, 3, (char *)buf, GFP_KERNEL)) |
1da177e4 LT |
528 | break; |
529 | buf++; | |
530 | if (priv->reg[0] & 0x01) { | |
531 | clear_epp_timeout(pp); | |
532 | break; | |
533 | } | |
534 | } | |
535 | change_mode(pp, ECR_PS2); | |
536 | return got; | |
537 | } | |
538 | ||
539 | static size_t parport_uss720_epp_write_addr(struct parport *pp, const void *buf, size_t length, int flags) | |
540 | { | |
541 | struct parport_uss720_private *priv = pp->private_data; | |
542 | size_t written = 0; | |
543 | ||
544 | if (change_mode(pp, ECR_EPP)) | |
545 | return 0; | |
546 | for (; written < length; written++) { | |
0f36163d | 547 | if (set_1284_register(pp, 3, *(char *)buf, GFP_KERNEL)) |
1da177e4 LT |
548 | break; |
549 | buf++; | |
0f36163d | 550 | if (get_1284_register(pp, 1, NULL, GFP_KERNEL)) |
1da177e4 LT |
551 | break; |
552 | if (priv->reg[0] & 0x01) { | |
553 | clear_epp_timeout(pp); | |
554 | break; | |
555 | } | |
556 | } | |
557 | change_mode(pp, ECR_PS2); | |
558 | return written; | |
559 | } | |
560 | ||
561 | static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buffer, size_t len, int flags) | |
562 | { | |
563 | struct parport_uss720_private *priv = pp->private_data; | |
564 | struct usb_device *usbdev = priv->usbdev; | |
565 | int rlen; | |
566 | int i; | |
567 | ||
568 | if (!usbdev) | |
569 | return 0; | |
570 | if (change_mode(pp, ECR_ECP)) | |
571 | return 0; | |
572 | i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000); | |
573 | if (i) | |
5b5e0928 | 574 | printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %zu rlen %u\n", buffer, len, rlen); |
1da177e4 LT |
575 | change_mode(pp, ECR_PS2); |
576 | return rlen; | |
577 | } | |
578 | ||
579 | static size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, size_t len, int flags) | |
580 | { | |
581 | struct parport_uss720_private *priv = pp->private_data; | |
582 | struct usb_device *usbdev = priv->usbdev; | |
583 | int rlen; | |
584 | int i; | |
585 | ||
586 | if (!usbdev) | |
587 | return 0; | |
588 | if (change_mode(pp, ECR_ECP)) | |
589 | return 0; | |
590 | i = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, 2), buffer, len, &rlen, 20000); | |
591 | if (i) | |
5b5e0928 | 592 | printk(KERN_ERR "uss720: recvbulk ep 2 buf %p len %zu rlen %u\n", buffer, len, rlen); |
1da177e4 LT |
593 | change_mode(pp, ECR_PS2); |
594 | return rlen; | |
595 | } | |
596 | ||
597 | static size_t parport_uss720_ecp_write_addr(struct parport *pp, const void *buffer, size_t len, int flags) | |
598 | { | |
599 | size_t written = 0; | |
600 | ||
601 | if (change_mode(pp, ECR_ECP)) | |
602 | return 0; | |
603 | for (; written < len; written++) { | |
0f36163d | 604 | if (set_1284_register(pp, 5, *(char *)buffer, GFP_KERNEL)) |
1da177e4 LT |
605 | break; |
606 | buffer++; | |
607 | } | |
608 | change_mode(pp, ECR_PS2); | |
609 | return written; | |
610 | } | |
611 | ||
612 | static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer, size_t len, int flags) | |
613 | { | |
614 | struct parport_uss720_private *priv = pp->private_data; | |
615 | struct usb_device *usbdev = priv->usbdev; | |
616 | int rlen; | |
617 | int i; | |
618 | ||
619 | if (!usbdev) | |
620 | return 0; | |
621 | if (change_mode(pp, ECR_PPF)) | |
622 | return 0; | |
623 | i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000); | |
624 | if (i) | |
5b5e0928 | 625 | printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %zu rlen %u\n", buffer, len, rlen); |
1da177e4 LT |
626 | change_mode(pp, ECR_PS2); |
627 | return rlen; | |
628 | } | |
629 | ||
630 | /* --------------------------------------------------------------------- */ | |
631 | ||
632 | static struct parport_operations parport_uss720_ops = | |
633 | { | |
634 | .owner = THIS_MODULE, | |
635 | .write_data = parport_uss720_write_data, | |
636 | .read_data = parport_uss720_read_data, | |
637 | ||
638 | .write_control = parport_uss720_write_control, | |
639 | .read_control = parport_uss720_read_control, | |
640 | .frob_control = parport_uss720_frob_control, | |
641 | ||
642 | .read_status = parport_uss720_read_status, | |
643 | ||
644 | .enable_irq = parport_uss720_enable_irq, | |
645 | .disable_irq = parport_uss720_disable_irq, | |
646 | ||
647 | .data_forward = parport_uss720_data_forward, | |
648 | .data_reverse = parport_uss720_data_reverse, | |
649 | ||
650 | .init_state = parport_uss720_init_state, | |
651 | .save_state = parport_uss720_save_state, | |
652 | .restore_state = parport_uss720_restore_state, | |
653 | ||
654 | .epp_write_data = parport_uss720_epp_write_data, | |
655 | .epp_read_data = parport_uss720_epp_read_data, | |
656 | .epp_write_addr = parport_uss720_epp_write_addr, | |
657 | .epp_read_addr = parport_uss720_epp_read_addr, | |
658 | ||
659 | .ecp_write_data = parport_uss720_ecp_write_data, | |
660 | .ecp_read_data = parport_uss720_ecp_read_data, | |
661 | .ecp_write_addr = parport_uss720_ecp_write_addr, | |
662 | ||
663 | .compat_write_data = parport_uss720_write_compat, | |
664 | .nibble_read_data = parport_ieee1284_read_nibble, | |
665 | .byte_read_data = parport_ieee1284_read_byte, | |
666 | }; | |
667 | ||
668 | /* --------------------------------------------------------------------- */ | |
669 | ||
670 | static int uss720_probe(struct usb_interface *intf, | |
671 | const struct usb_device_id *id) | |
672 | { | |
0f36163d | 673 | struct usb_device *usbdev = usb_get_dev(interface_to_usbdev(intf)); |
1da177e4 | 674 | struct usb_host_interface *interface; |
9fdc1c6f | 675 | struct usb_endpoint_descriptor *epd; |
1da177e4 LT |
676 | struct parport_uss720_private *priv; |
677 | struct parport *pp; | |
0f36163d | 678 | unsigned char reg; |
1da177e4 LT |
679 | int i; |
680 | ||
7a2d2810 GKH |
681 | dev_dbg(&intf->dev, "probe: vendor id 0x%x, device id 0x%x\n", |
682 | le16_to_cpu(usbdev->descriptor.idVendor), | |
683 | le16_to_cpu(usbdev->descriptor.idProduct)); | |
1da177e4 LT |
684 | |
685 | /* our known interfaces have 3 alternate settings */ | |
0f36163d TS |
686 | if (intf->num_altsetting != 3) { |
687 | usb_put_dev(usbdev); | |
1da177e4 | 688 | return -ENODEV; |
0f36163d | 689 | } |
1da177e4 | 690 | i = usb_set_interface(usbdev, intf->altsetting->desc.bInterfaceNumber, 2); |
cf2fbdd2 | 691 | dev_dbg(&intf->dev, "set interface result %d\n", i); |
1da177e4 LT |
692 | |
693 | interface = intf->cur_altsetting; | |
694 | ||
f259ca3e JH |
695 | if (interface->desc.bNumEndpoints < 3) { |
696 | usb_put_dev(usbdev); | |
697 | return -ENODEV; | |
698 | } | |
699 | ||
1da177e4 LT |
700 | /* |
701 | * Allocate parport interface | |
702 | */ | |
adde04c6 GKH |
703 | priv = kzalloc(sizeof(struct parport_uss720_private), GFP_KERNEL); |
704 | if (!priv) { | |
0f36163d | 705 | usb_put_dev(usbdev); |
1da177e4 | 706 | return -ENOMEM; |
0f36163d TS |
707 | } |
708 | priv->pp = NULL; | |
709 | priv->usbdev = usbdev; | |
710 | kref_init(&priv->ref_count); | |
711 | spin_lock_init(&priv->asynclock); | |
712 | INIT_LIST_HEAD(&priv->asynclist); | |
adde04c6 GKH |
713 | pp = parport_register_port(0, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &parport_uss720_ops); |
714 | if (!pp) { | |
3b6004f3 | 715 | printk(KERN_WARNING "uss720: could not register parport\n"); |
1da177e4 LT |
716 | goto probe_abort; |
717 | } | |
718 | ||
0f36163d | 719 | priv->pp = pp; |
1da177e4 | 720 | pp->private_data = priv; |
1da177e4 LT |
721 | pp->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP | PARPORT_MODE_ECP | PARPORT_MODE_COMPAT; |
722 | ||
723 | /* set the USS720 control register to manual mode, no ECP compression, enable all ints */ | |
0f36163d TS |
724 | set_1284_register(pp, 7, 0x00, GFP_KERNEL); |
725 | set_1284_register(pp, 6, 0x30, GFP_KERNEL); /* PS/2 mode */ | |
726 | set_1284_register(pp, 2, 0x0c, GFP_KERNEL); | |
1da177e4 | 727 | /* debugging */ |
0f36163d | 728 | get_1284_register(pp, 0, ®, GFP_KERNEL); |
5d31a6dc | 729 | dev_dbg(&intf->dev, "reg: %7ph\n", priv->reg); |
1da177e4 | 730 | |
9fdc1c6f JH |
731 | i = usb_find_last_int_in_endpoint(interface, &epd); |
732 | if (!i) { | |
733 | dev_dbg(&intf->dev, "epaddr %d interval %d\n", | |
734 | epd->bEndpointAddress, epd->bInterval); | |
735 | } | |
1da177e4 LT |
736 | parport_announce_port(pp); |
737 | ||
0f36163d | 738 | usb_set_intfdata(intf, pp); |
1da177e4 LT |
739 | return 0; |
740 | ||
1da177e4 | 741 | probe_abort: |
0f36163d TS |
742 | kill_all_async_requests_priv(priv); |
743 | kref_put(&priv->ref_count, destroy_priv); | |
1da177e4 LT |
744 | return -ENODEV; |
745 | } | |
746 | ||
747 | static void uss720_disconnect(struct usb_interface *intf) | |
748 | { | |
0f36163d | 749 | struct parport *pp = usb_get_intfdata(intf); |
1da177e4 | 750 | struct parport_uss720_private *priv; |
0f36163d | 751 | struct usb_device *usbdev; |
1da177e4 | 752 | |
7a2d2810 | 753 | dev_dbg(&intf->dev, "disconnect\n"); |
0f36163d | 754 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
755 | if (pp) { |
756 | priv = pp->private_data; | |
0f36163d | 757 | usbdev = priv->usbdev; |
1da177e4 | 758 | priv->usbdev = NULL; |
0f36163d | 759 | priv->pp = NULL; |
7a2d2810 | 760 | dev_dbg(&intf->dev, "parport_remove_port\n"); |
0f36163d | 761 | parport_remove_port(pp); |
1da177e4 | 762 | parport_put_port(pp); |
0f36163d TS |
763 | kill_all_async_requests_priv(priv); |
764 | kref_put(&priv->ref_count, destroy_priv); | |
1da177e4 | 765 | } |
7a2d2810 | 766 | dev_dbg(&intf->dev, "disconnect done\n"); |
1da177e4 LT |
767 | } |
768 | ||
769 | /* table of cables that work through this driver */ | |
33b9e162 | 770 | static const struct usb_device_id uss720_table[] = { |
1da177e4 | 771 | { USB_DEVICE(0x047e, 0x1001) }, |
e3cb7bde DG |
772 | { USB_DEVICE(0x04b8, 0x0002) }, |
773 | { USB_DEVICE(0x04b8, 0x0003) }, | |
774 | { USB_DEVICE(0x050d, 0x0002) }, | |
775 | { USB_DEVICE(0x050d, 0x1202) }, | |
1da177e4 | 776 | { USB_DEVICE(0x0557, 0x2001) }, |
e3cb7bde DG |
777 | { USB_DEVICE(0x05ab, 0x0002) }, |
778 | { USB_DEVICE(0x06c6, 0x0100) }, | |
1da177e4 LT |
779 | { USB_DEVICE(0x0729, 0x1284) }, |
780 | { USB_DEVICE(0x1293, 0x0002) }, | |
781 | { } /* Terminating entry */ | |
782 | }; | |
783 | ||
784 | MODULE_DEVICE_TABLE (usb, uss720_table); | |
785 | ||
786 | ||
787 | static struct usb_driver uss720_driver = { | |
1da177e4 LT |
788 | .name = "uss720", |
789 | .probe = uss720_probe, | |
790 | .disconnect = uss720_disconnect, | |
791 | .id_table = uss720_table, | |
792 | }; | |
793 | ||
794 | /* --------------------------------------------------------------------- */ | |
795 | ||
0f36163d TS |
796 | MODULE_AUTHOR(DRIVER_AUTHOR); |
797 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
798 | MODULE_LICENSE("GPL"); |
799 | ||
800 | static int __init uss720_init(void) | |
801 | { | |
802 | int retval; | |
803 | retval = usb_register(&uss720_driver); | |
804 | if (retval) | |
805 | goto out; | |
806 | ||
c35c376f | 807 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1b29a375 GKH |
808 | printk(KERN_INFO KBUILD_MODNAME ": NOTE: this is a special purpose " |
809 | "driver to allow nonstandard\n"); | |
810 | printk(KERN_INFO KBUILD_MODNAME ": protocols (eg. bitbang) over " | |
811 | "USS720 usb to parallel cables\n"); | |
812 | printk(KERN_INFO KBUILD_MODNAME ": If you just want to connect to a " | |
813 | "printer, use usblp instead\n"); | |
1da177e4 LT |
814 | out: |
815 | return retval; | |
816 | } | |
817 | ||
818 | static void __exit uss720_cleanup(void) | |
819 | { | |
820 | usb_deregister(&uss720_driver); | |
821 | } | |
822 | ||
823 | module_init(uss720_init); | |
824 | module_exit(uss720_cleanup); | |
825 | ||
826 | /* --------------------------------------------------------------------- */ |