Commit | Line | Data |
---|---|---|
25a010c8 CN |
1 | /* |
2 | * printer.c -- Printer gadget driver | |
3 | * | |
4 | * Copyright (C) 2003-2005 David Brownell | |
5 | * Copyright (C) 2006 Craig W. Nadler | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
25a010c8 CN |
11 | */ |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/ioport.h> | |
17 | #include <linux/sched.h> | |
18 | #include <linux/slab.h> | |
925ce689 | 19 | #include <linux/mutex.h> |
25a010c8 CN |
20 | #include <linux/errno.h> |
21 | #include <linux/init.h> | |
22 | #include <linux/timer.h> | |
23 | #include <linux/list.h> | |
24 | #include <linux/interrupt.h> | |
25a010c8 CN |
25 | #include <linux/device.h> |
26 | #include <linux/moduleparam.h> | |
27 | #include <linux/fs.h> | |
28 | #include <linux/poll.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/ctype.h> | |
31 | #include <linux/cdev.h> | |
32 | ||
33 | #include <asm/byteorder.h> | |
34 | #include <linux/io.h> | |
35 | #include <linux/irq.h> | |
25a010c8 CN |
36 | #include <linux/uaccess.h> |
37 | #include <asm/unaligned.h> | |
38 | ||
39 | #include <linux/usb/ch9.h> | |
721e2e91 | 40 | #include <linux/usb/composite.h> |
25a010c8 CN |
41 | #include <linux/usb/gadget.h> |
42 | #include <linux/usb/g_printer.h> | |
43 | ||
44 | #include "gadget_chips.h" | |
45 | ||
7d16e8d3 | 46 | USB_GADGET_COMPOSITE_OPTIONS(); |
0a56b03f | 47 | |
25a010c8 CN |
48 | #define DRIVER_DESC "Printer Gadget" |
49 | #define DRIVER_VERSION "2007 OCT 06" | |
50 | ||
925ce689 | 51 | static DEFINE_MUTEX(printer_mutex); |
25a010c8 CN |
52 | static const char shortname [] = "printer"; |
53 | static const char driver_desc [] = DRIVER_DESC; | |
54 | ||
55 | static dev_t g_printer_devno; | |
56 | ||
57 | static struct class *usb_gadget_class; | |
58 | ||
59 | /*-------------------------------------------------------------------------*/ | |
60 | ||
61 | struct printer_dev { | |
62 | spinlock_t lock; /* lock this structure */ | |
63 | /* lock buffer lists during read/write calls */ | |
10ca4425 | 64 | struct mutex lock_printer_io; |
25a010c8 | 65 | struct usb_gadget *gadget; |
25a010c8 CN |
66 | s8 interface; |
67 | struct usb_ep *in_ep, *out_ep; | |
72c973dd | 68 | |
25a010c8 CN |
69 | struct list_head rx_reqs; /* List of free RX structs */ |
70 | struct list_head rx_reqs_active; /* List of Active RX xfers */ | |
71 | struct list_head rx_buffers; /* List of completed xfers */ | |
72 | /* wait until there is data to be read. */ | |
73 | wait_queue_head_t rx_wait; | |
74 | struct list_head tx_reqs; /* List of free TX structs */ | |
75 | struct list_head tx_reqs_active; /* List of Active TX xfers */ | |
76 | /* Wait until there are write buffers available to use. */ | |
77 | wait_queue_head_t tx_wait; | |
78 | /* Wait until all write buffers have been sent. */ | |
79 | wait_queue_head_t tx_flush_wait; | |
80 | struct usb_request *current_rx_req; | |
81 | size_t current_rx_bytes; | |
82 | u8 *current_rx_buf; | |
83 | u8 printer_status; | |
84 | u8 reset_printer; | |
25a010c8 CN |
85 | struct cdev printer_cdev; |
86 | struct device *pdev; | |
87 | u8 printer_cdev_open; | |
88 | wait_queue_head_t wait; | |
2e87edf4 | 89 | struct usb_function function; |
25a010c8 CN |
90 | }; |
91 | ||
92 | static struct printer_dev usb_printer_gadget; | |
93 | ||
94 | /*-------------------------------------------------------------------------*/ | |
95 | ||
96 | /* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! | |
97 | * Instead: allocate your own, using normal USB-IF procedures. | |
98 | */ | |
99 | ||
100 | /* Thanks to NetChip Technologies for donating this product ID. | |
101 | */ | |
102 | #define PRINTER_VENDOR_NUM 0x0525 /* NetChip */ | |
103 | #define PRINTER_PRODUCT_NUM 0xa4a8 /* Linux-USB Printer Gadget */ | |
104 | ||
25985edc | 105 | /* Some systems will want different product identifiers published in the |
25a010c8 CN |
106 | * device descriptor, either numbers or strings or both. These string |
107 | * parameters are in UTF-8 (superset of ASCII's 7 bit characters). | |
108 | */ | |
109 | ||
1cf0d264 | 110 | module_param_named(iSerialNum, coverwrite.serial_number, charp, S_IRUGO); |
25a010c8 CN |
111 | MODULE_PARM_DESC(iSerialNum, "1"); |
112 | ||
ad84e4a9 | 113 | static char *iPNPstring; |
25a010c8 CN |
114 | module_param(iPNPstring, charp, S_IRUGO); |
115 | MODULE_PARM_DESC(iPNPstring, "MFG:linux;MDL:g_printer;CLS:PRINTER;SN:1;"); | |
116 | ||
117 | /* Number of requests to allocate per endpoint, not used for ep0. */ | |
118 | static unsigned qlen = 10; | |
119 | module_param(qlen, uint, S_IRUGO|S_IWUSR); | |
120 | ||
121 | #define QLEN qlen | |
122 | ||
25a010c8 CN |
123 | /*-------------------------------------------------------------------------*/ |
124 | ||
25a010c8 CN |
125 | /* |
126 | * DESCRIPTORS ... most are static, but strings and (full) configuration | |
127 | * descriptors are built on demand. | |
128 | */ | |
129 | ||
25a010c8 CN |
130 | /* holds our biggest descriptor */ |
131 | #define USB_DESC_BUFSIZE 256 | |
132 | #define USB_BUFSIZE 8192 | |
133 | ||
25a010c8 CN |
134 | static struct usb_device_descriptor device_desc = { |
135 | .bLength = sizeof device_desc, | |
136 | .bDescriptorType = USB_DT_DEVICE, | |
551509d2 | 137 | .bcdUSB = cpu_to_le16(0x0200), |
25a010c8 CN |
138 | .bDeviceClass = USB_CLASS_PER_INTERFACE, |
139 | .bDeviceSubClass = 0, | |
140 | .bDeviceProtocol = 0, | |
551509d2 HH |
141 | .idVendor = cpu_to_le16(PRINTER_VENDOR_NUM), |
142 | .idProduct = cpu_to_le16(PRINTER_PRODUCT_NUM), | |
25a010c8 CN |
143 | .bNumConfigurations = 1 |
144 | }; | |
145 | ||
25a010c8 CN |
146 | static struct usb_interface_descriptor intf_desc = { |
147 | .bLength = sizeof intf_desc, | |
148 | .bDescriptorType = USB_DT_INTERFACE, | |
25a010c8 CN |
149 | .bNumEndpoints = 2, |
150 | .bInterfaceClass = USB_CLASS_PRINTER, | |
151 | .bInterfaceSubClass = 1, /* Printer Sub-Class */ | |
152 | .bInterfaceProtocol = 2, /* Bi-Directional */ | |
153 | .iInterface = 0 | |
154 | }; | |
155 | ||
156 | static struct usb_endpoint_descriptor fs_ep_in_desc = { | |
157 | .bLength = USB_DT_ENDPOINT_SIZE, | |
158 | .bDescriptorType = USB_DT_ENDPOINT, | |
159 | .bEndpointAddress = USB_DIR_IN, | |
160 | .bmAttributes = USB_ENDPOINT_XFER_BULK | |
161 | }; | |
162 | ||
163 | static struct usb_endpoint_descriptor fs_ep_out_desc = { | |
164 | .bLength = USB_DT_ENDPOINT_SIZE, | |
165 | .bDescriptorType = USB_DT_ENDPOINT, | |
166 | .bEndpointAddress = USB_DIR_OUT, | |
167 | .bmAttributes = USB_ENDPOINT_XFER_BULK | |
168 | }; | |
169 | ||
2e87edf4 | 170 | static struct usb_descriptor_header *fs_printer_function[] = { |
25a010c8 CN |
171 | (struct usb_descriptor_header *) &intf_desc, |
172 | (struct usb_descriptor_header *) &fs_ep_in_desc, | |
173 | (struct usb_descriptor_header *) &fs_ep_out_desc, | |
174 | NULL | |
175 | }; | |
176 | ||
25a010c8 CN |
177 | /* |
178 | * usb 2.0 devices need to expose both high speed and full speed | |
179 | * descriptors, unless they only run at full speed. | |
180 | */ | |
181 | ||
182 | static struct usb_endpoint_descriptor hs_ep_in_desc = { | |
183 | .bLength = USB_DT_ENDPOINT_SIZE, | |
184 | .bDescriptorType = USB_DT_ENDPOINT, | |
185 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
551509d2 | 186 | .wMaxPacketSize = cpu_to_le16(512) |
25a010c8 CN |
187 | }; |
188 | ||
189 | static struct usb_endpoint_descriptor hs_ep_out_desc = { | |
190 | .bLength = USB_DT_ENDPOINT_SIZE, | |
191 | .bDescriptorType = USB_DT_ENDPOINT, | |
192 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
551509d2 | 193 | .wMaxPacketSize = cpu_to_le16(512) |
25a010c8 CN |
194 | }; |
195 | ||
196 | static struct usb_qualifier_descriptor dev_qualifier = { | |
197 | .bLength = sizeof dev_qualifier, | |
198 | .bDescriptorType = USB_DT_DEVICE_QUALIFIER, | |
551509d2 | 199 | .bcdUSB = cpu_to_le16(0x0200), |
25a010c8 CN |
200 | .bDeviceClass = USB_CLASS_PRINTER, |
201 | .bNumConfigurations = 1 | |
202 | }; | |
203 | ||
2e87edf4 | 204 | static struct usb_descriptor_header *hs_printer_function[] = { |
25a010c8 CN |
205 | (struct usb_descriptor_header *) &intf_desc, |
206 | (struct usb_descriptor_header *) &hs_ep_in_desc, | |
207 | (struct usb_descriptor_header *) &hs_ep_out_desc, | |
208 | NULL | |
209 | }; | |
210 | ||
2e87edf4 SAS |
211 | static struct usb_otg_descriptor otg_descriptor = { |
212 | .bLength = sizeof otg_descriptor, | |
213 | .bDescriptorType = USB_DT_OTG, | |
214 | .bmAttributes = USB_OTG_SRP, | |
215 | }; | |
216 | ||
217 | static const struct usb_descriptor_header *otg_desc[] = { | |
218 | (struct usb_descriptor_header *) &otg_descriptor, | |
219 | NULL, | |
220 | }; | |
221 | ||
25a010c8 CN |
222 | /* maxpacket and other transfer characteristics vary by speed. */ |
223 | #define ep_desc(g, hs, fs) (((g)->speed == USB_SPEED_HIGH)?(hs):(fs)) | |
224 | ||
25a010c8 CN |
225 | /*-------------------------------------------------------------------------*/ |
226 | ||
227 | /* descriptors that are built on-demand */ | |
228 | ||
25a010c8 CN |
229 | static char product_desc [40] = DRIVER_DESC; |
230 | static char serial_num [40] = "1"; | |
231 | static char pnp_string [1024] = | |
232 | "XXMFG:linux;MDL:g_printer;CLS:PRINTER;SN:1;"; | |
233 | ||
234 | /* static strings, in UTF-8 */ | |
235 | static struct usb_string strings [] = { | |
cc2683c3 | 236 | [USB_GADGET_MANUFACTURER_IDX].s = "", |
276e2e4f SAS |
237 | [USB_GADGET_PRODUCT_IDX].s = product_desc, |
238 | [USB_GADGET_SERIAL_IDX].s = serial_num, | |
25a010c8 CN |
239 | { } /* end of list */ |
240 | }; | |
241 | ||
2e87edf4 | 242 | static struct usb_gadget_strings stringtab_dev = { |
25a010c8 CN |
243 | .language = 0x0409, /* en-us */ |
244 | .strings = strings, | |
245 | }; | |
246 | ||
2e87edf4 SAS |
247 | static struct usb_gadget_strings *dev_strings[] = { |
248 | &stringtab_dev, | |
249 | NULL, | |
250 | }; | |
251 | ||
25a010c8 CN |
252 | /*-------------------------------------------------------------------------*/ |
253 | ||
254 | static struct usb_request * | |
255 | printer_req_alloc(struct usb_ep *ep, unsigned len, gfp_t gfp_flags) | |
256 | { | |
257 | struct usb_request *req; | |
258 | ||
259 | req = usb_ep_alloc_request(ep, gfp_flags); | |
260 | ||
261 | if (req != NULL) { | |
262 | req->length = len; | |
263 | req->buf = kmalloc(len, gfp_flags); | |
264 | if (req->buf == NULL) { | |
265 | usb_ep_free_request(ep, req); | |
266 | return NULL; | |
267 | } | |
268 | } | |
269 | ||
270 | return req; | |
271 | } | |
272 | ||
273 | static void | |
274 | printer_req_free(struct usb_ep *ep, struct usb_request *req) | |
275 | { | |
276 | if (ep != NULL && req != NULL) { | |
277 | kfree(req->buf); | |
278 | usb_ep_free_request(ep, req); | |
279 | } | |
280 | } | |
281 | ||
282 | /*-------------------------------------------------------------------------*/ | |
283 | ||
284 | static void rx_complete(struct usb_ep *ep, struct usb_request *req) | |
285 | { | |
286 | struct printer_dev *dev = ep->driver_data; | |
287 | int status = req->status; | |
288 | unsigned long flags; | |
289 | ||
290 | spin_lock_irqsave(&dev->lock, flags); | |
291 | ||
292 | list_del_init(&req->list); /* Remode from Active List */ | |
293 | ||
294 | switch (status) { | |
295 | ||
296 | /* normal completion */ | |
297 | case 0: | |
cc901bbb CN |
298 | if (req->actual > 0) { |
299 | list_add_tail(&req->list, &dev->rx_buffers); | |
300 | DBG(dev, "G_Printer : rx length %d\n", req->actual); | |
301 | } else { | |
302 | list_add(&req->list, &dev->rx_reqs); | |
303 | } | |
25a010c8 CN |
304 | break; |
305 | ||
306 | /* software-driven interface shutdown */ | |
307 | case -ECONNRESET: /* unlink */ | |
308 | case -ESHUTDOWN: /* disconnect etc */ | |
309 | VDBG(dev, "rx shutdown, code %d\n", status); | |
310 | list_add(&req->list, &dev->rx_reqs); | |
311 | break; | |
312 | ||
313 | /* for hardware automagic (such as pxa) */ | |
314 | case -ECONNABORTED: /* endpoint reset */ | |
315 | DBG(dev, "rx %s reset\n", ep->name); | |
316 | list_add(&req->list, &dev->rx_reqs); | |
317 | break; | |
318 | ||
319 | /* data overrun */ | |
320 | case -EOVERFLOW: | |
321 | /* FALLTHROUGH */ | |
322 | ||
323 | default: | |
324 | DBG(dev, "rx status %d\n", status); | |
325 | list_add(&req->list, &dev->rx_reqs); | |
326 | break; | |
327 | } | |
cc901bbb CN |
328 | |
329 | wake_up_interruptible(&dev->rx_wait); | |
25a010c8 CN |
330 | spin_unlock_irqrestore(&dev->lock, flags); |
331 | } | |
332 | ||
333 | static void tx_complete(struct usb_ep *ep, struct usb_request *req) | |
334 | { | |
335 | struct printer_dev *dev = ep->driver_data; | |
336 | ||
337 | switch (req->status) { | |
338 | default: | |
339 | VDBG(dev, "tx err %d\n", req->status); | |
340 | /* FALLTHROUGH */ | |
341 | case -ECONNRESET: /* unlink */ | |
342 | case -ESHUTDOWN: /* disconnect etc */ | |
343 | break; | |
344 | case 0: | |
345 | break; | |
346 | } | |
347 | ||
348 | spin_lock(&dev->lock); | |
349 | /* Take the request struct off the active list and put it on the | |
350 | * free list. | |
351 | */ | |
352 | list_del_init(&req->list); | |
353 | list_add(&req->list, &dev->tx_reqs); | |
354 | wake_up_interruptible(&dev->tx_wait); | |
355 | if (likely(list_empty(&dev->tx_reqs_active))) | |
356 | wake_up_interruptible(&dev->tx_flush_wait); | |
357 | ||
358 | spin_unlock(&dev->lock); | |
359 | } | |
360 | ||
361 | /*-------------------------------------------------------------------------*/ | |
362 | ||
363 | static int | |
364 | printer_open(struct inode *inode, struct file *fd) | |
365 | { | |
366 | struct printer_dev *dev; | |
367 | unsigned long flags; | |
368 | int ret = -EBUSY; | |
369 | ||
925ce689 | 370 | mutex_lock(&printer_mutex); |
25a010c8 CN |
371 | dev = container_of(inode->i_cdev, struct printer_dev, printer_cdev); |
372 | ||
373 | spin_lock_irqsave(&dev->lock, flags); | |
374 | ||
375 | if (!dev->printer_cdev_open) { | |
376 | dev->printer_cdev_open = 1; | |
377 | fd->private_data = dev; | |
378 | ret = 0; | |
379 | /* Change the printer status to show that it's on-line. */ | |
380 | dev->printer_status |= PRINTER_SELECTED; | |
381 | } | |
382 | ||
383 | spin_unlock_irqrestore(&dev->lock, flags); | |
384 | ||
385 | DBG(dev, "printer_open returned %x\n", ret); | |
925ce689 | 386 | mutex_unlock(&printer_mutex); |
25a010c8 CN |
387 | return ret; |
388 | } | |
389 | ||
390 | static int | |
391 | printer_close(struct inode *inode, struct file *fd) | |
392 | { | |
393 | struct printer_dev *dev = fd->private_data; | |
394 | unsigned long flags; | |
395 | ||
396 | spin_lock_irqsave(&dev->lock, flags); | |
397 | dev->printer_cdev_open = 0; | |
398 | fd->private_data = NULL; | |
399 | /* Change printer status to show that the printer is off-line. */ | |
400 | dev->printer_status &= ~PRINTER_SELECTED; | |
401 | spin_unlock_irqrestore(&dev->lock, flags); | |
402 | ||
403 | DBG(dev, "printer_close\n"); | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
cc901bbb CN |
408 | /* This function must be called with interrupts turned off. */ |
409 | static void | |
410 | setup_rx_reqs(struct printer_dev *dev) | |
411 | { | |
412 | struct usb_request *req; | |
413 | ||
414 | while (likely(!list_empty(&dev->rx_reqs))) { | |
415 | int error; | |
416 | ||
417 | req = container_of(dev->rx_reqs.next, | |
418 | struct usb_request, list); | |
419 | list_del_init(&req->list); | |
420 | ||
421 | /* The USB Host sends us whatever amount of data it wants to | |
422 | * so we always set the length field to the full USB_BUFSIZE. | |
423 | * If the amount of data is more than the read() caller asked | |
424 | * for it will be stored in the request buffer until it is | |
425 | * asked for by read(). | |
426 | */ | |
427 | req->length = USB_BUFSIZE; | |
428 | req->complete = rx_complete; | |
429 | ||
430 | error = usb_ep_queue(dev->out_ep, req, GFP_ATOMIC); | |
431 | if (error) { | |
432 | DBG(dev, "rx submit --> %d\n", error); | |
433 | list_add(&req->list, &dev->rx_reqs); | |
434 | break; | |
435 | } else { | |
436 | list_add(&req->list, &dev->rx_reqs_active); | |
437 | } | |
438 | } | |
439 | } | |
440 | ||
25a010c8 CN |
441 | static ssize_t |
442 | printer_read(struct file *fd, char __user *buf, size_t len, loff_t *ptr) | |
443 | { | |
444 | struct printer_dev *dev = fd->private_data; | |
445 | unsigned long flags; | |
446 | size_t size; | |
447 | size_t bytes_copied; | |
448 | struct usb_request *req; | |
449 | /* This is a pointer to the current USB rx request. */ | |
450 | struct usb_request *current_rx_req; | |
451 | /* This is the number of bytes in the current rx buffer. */ | |
452 | size_t current_rx_bytes; | |
453 | /* This is a pointer to the current rx buffer. */ | |
454 | u8 *current_rx_buf; | |
455 | ||
456 | if (len == 0) | |
457 | return -EINVAL; | |
458 | ||
459 | DBG(dev, "printer_read trying to read %d bytes\n", (int)len); | |
460 | ||
10ca4425 | 461 | mutex_lock(&dev->lock_printer_io); |
25a010c8 CN |
462 | spin_lock_irqsave(&dev->lock, flags); |
463 | ||
464 | /* We will use this flag later to check if a printer reset happened | |
465 | * after we turn interrupts back on. | |
466 | */ | |
467 | dev->reset_printer = 0; | |
468 | ||
cc901bbb | 469 | setup_rx_reqs(dev); |
25a010c8 CN |
470 | |
471 | bytes_copied = 0; | |
472 | current_rx_req = dev->current_rx_req; | |
473 | current_rx_bytes = dev->current_rx_bytes; | |
474 | current_rx_buf = dev->current_rx_buf; | |
475 | dev->current_rx_req = NULL; | |
476 | dev->current_rx_bytes = 0; | |
477 | dev->current_rx_buf = NULL; | |
478 | ||
479 | /* Check if there is any data in the read buffers. Please note that | |
480 | * current_rx_bytes is the number of bytes in the current rx buffer. | |
481 | * If it is zero then check if there are any other rx_buffers that | |
482 | * are on the completed list. We are only out of data if all rx | |
483 | * buffers are empty. | |
484 | */ | |
485 | if ((current_rx_bytes == 0) && | |
486 | (likely(list_empty(&dev->rx_buffers)))) { | |
487 | /* Turn interrupts back on before sleeping. */ | |
488 | spin_unlock_irqrestore(&dev->lock, flags); | |
489 | ||
490 | /* | |
491 | * If no data is available check if this is a NON-Blocking | |
492 | * call or not. | |
493 | */ | |
494 | if (fd->f_flags & (O_NONBLOCK|O_NDELAY)) { | |
10ca4425 | 495 | mutex_unlock(&dev->lock_printer_io); |
25a010c8 CN |
496 | return -EAGAIN; |
497 | } | |
498 | ||
499 | /* Sleep until data is available */ | |
500 | wait_event_interruptible(dev->rx_wait, | |
501 | (likely(!list_empty(&dev->rx_buffers)))); | |
502 | spin_lock_irqsave(&dev->lock, flags); | |
503 | } | |
504 | ||
505 | /* We have data to return then copy it to the caller's buffer.*/ | |
506 | while ((current_rx_bytes || likely(!list_empty(&dev->rx_buffers))) | |
507 | && len) { | |
508 | if (current_rx_bytes == 0) { | |
509 | req = container_of(dev->rx_buffers.next, | |
510 | struct usb_request, list); | |
511 | list_del_init(&req->list); | |
512 | ||
513 | if (req->actual && req->buf) { | |
514 | current_rx_req = req; | |
515 | current_rx_bytes = req->actual; | |
516 | current_rx_buf = req->buf; | |
517 | } else { | |
518 | list_add(&req->list, &dev->rx_reqs); | |
519 | continue; | |
520 | } | |
521 | } | |
522 | ||
523 | /* Don't leave irqs off while doing memory copies */ | |
524 | spin_unlock_irqrestore(&dev->lock, flags); | |
525 | ||
526 | if (len > current_rx_bytes) | |
527 | size = current_rx_bytes; | |
528 | else | |
529 | size = len; | |
530 | ||
531 | size -= copy_to_user(buf, current_rx_buf, size); | |
532 | bytes_copied += size; | |
533 | len -= size; | |
534 | buf += size; | |
535 | ||
536 | spin_lock_irqsave(&dev->lock, flags); | |
537 | ||
cc901bbb | 538 | /* We've disconnected or reset so return. */ |
25a010c8 | 539 | if (dev->reset_printer) { |
cc901bbb | 540 | list_add(¤t_rx_req->list, &dev->rx_reqs); |
25a010c8 | 541 | spin_unlock_irqrestore(&dev->lock, flags); |
10ca4425 | 542 | mutex_unlock(&dev->lock_printer_io); |
25a010c8 CN |
543 | return -EAGAIN; |
544 | } | |
545 | ||
546 | /* If we not returning all the data left in this RX request | |
547 | * buffer then adjust the amount of data left in the buffer. | |
548 | * Othewise if we are done with this RX request buffer then | |
549 | * requeue it to get any incoming data from the USB host. | |
550 | */ | |
551 | if (size < current_rx_bytes) { | |
552 | current_rx_bytes -= size; | |
553 | current_rx_buf += size; | |
554 | } else { | |
555 | list_add(¤t_rx_req->list, &dev->rx_reqs); | |
556 | current_rx_bytes = 0; | |
557 | current_rx_buf = NULL; | |
558 | current_rx_req = NULL; | |
559 | } | |
560 | } | |
561 | ||
562 | dev->current_rx_req = current_rx_req; | |
563 | dev->current_rx_bytes = current_rx_bytes; | |
564 | dev->current_rx_buf = current_rx_buf; | |
565 | ||
566 | spin_unlock_irqrestore(&dev->lock, flags); | |
10ca4425 | 567 | mutex_unlock(&dev->lock_printer_io); |
25a010c8 CN |
568 | |
569 | DBG(dev, "printer_read returned %d bytes\n", (int)bytes_copied); | |
570 | ||
571 | if (bytes_copied) | |
572 | return bytes_copied; | |
573 | else | |
574 | return -EAGAIN; | |
575 | } | |
576 | ||
577 | static ssize_t | |
578 | printer_write(struct file *fd, const char __user *buf, size_t len, loff_t *ptr) | |
579 | { | |
580 | struct printer_dev *dev = fd->private_data; | |
581 | unsigned long flags; | |
582 | size_t size; /* Amount of data in a TX request. */ | |
583 | size_t bytes_copied = 0; | |
584 | struct usb_request *req; | |
585 | ||
586 | DBG(dev, "printer_write trying to send %d bytes\n", (int)len); | |
587 | ||
588 | if (len == 0) | |
589 | return -EINVAL; | |
590 | ||
10ca4425 | 591 | mutex_lock(&dev->lock_printer_io); |
25a010c8 CN |
592 | spin_lock_irqsave(&dev->lock, flags); |
593 | ||
594 | /* Check if a printer reset happens while we have interrupts on */ | |
595 | dev->reset_printer = 0; | |
596 | ||
597 | /* Check if there is any available write buffers */ | |
598 | if (likely(list_empty(&dev->tx_reqs))) { | |
599 | /* Turn interrupts back on before sleeping. */ | |
600 | spin_unlock_irqrestore(&dev->lock, flags); | |
601 | ||
602 | /* | |
603 | * If write buffers are available check if this is | |
604 | * a NON-Blocking call or not. | |
605 | */ | |
606 | if (fd->f_flags & (O_NONBLOCK|O_NDELAY)) { | |
10ca4425 | 607 | mutex_unlock(&dev->lock_printer_io); |
25a010c8 CN |
608 | return -EAGAIN; |
609 | } | |
610 | ||
611 | /* Sleep until a write buffer is available */ | |
612 | wait_event_interruptible(dev->tx_wait, | |
613 | (likely(!list_empty(&dev->tx_reqs)))); | |
614 | spin_lock_irqsave(&dev->lock, flags); | |
615 | } | |
616 | ||
617 | while (likely(!list_empty(&dev->tx_reqs)) && len) { | |
618 | ||
619 | if (len > USB_BUFSIZE) | |
620 | size = USB_BUFSIZE; | |
621 | else | |
622 | size = len; | |
623 | ||
624 | req = container_of(dev->tx_reqs.next, struct usb_request, | |
625 | list); | |
626 | list_del_init(&req->list); | |
627 | ||
628 | req->complete = tx_complete; | |
629 | req->length = size; | |
630 | ||
631 | /* Check if we need to send a zero length packet. */ | |
632 | if (len > size) | |
633 | /* They will be more TX requests so no yet. */ | |
634 | req->zero = 0; | |
635 | else | |
636 | /* If the data amount is not a multple of the | |
637 | * maxpacket size then send a zero length packet. | |
638 | */ | |
639 | req->zero = ((len % dev->in_ep->maxpacket) == 0); | |
640 | ||
641 | /* Don't leave irqs off while doing memory copies */ | |
642 | spin_unlock_irqrestore(&dev->lock, flags); | |
643 | ||
644 | if (copy_from_user(req->buf, buf, size)) { | |
645 | list_add(&req->list, &dev->tx_reqs); | |
10ca4425 | 646 | mutex_unlock(&dev->lock_printer_io); |
25a010c8 CN |
647 | return bytes_copied; |
648 | } | |
649 | ||
650 | bytes_copied += size; | |
651 | len -= size; | |
652 | buf += size; | |
653 | ||
654 | spin_lock_irqsave(&dev->lock, flags); | |
655 | ||
656 | /* We've disconnected or reset so free the req and buffer */ | |
657 | if (dev->reset_printer) { | |
cc901bbb | 658 | list_add(&req->list, &dev->tx_reqs); |
25a010c8 | 659 | spin_unlock_irqrestore(&dev->lock, flags); |
10ca4425 | 660 | mutex_unlock(&dev->lock_printer_io); |
25a010c8 CN |
661 | return -EAGAIN; |
662 | } | |
663 | ||
664 | if (usb_ep_queue(dev->in_ep, req, GFP_ATOMIC)) { | |
665 | list_add(&req->list, &dev->tx_reqs); | |
666 | spin_unlock_irqrestore(&dev->lock, flags); | |
10ca4425 | 667 | mutex_unlock(&dev->lock_printer_io); |
25a010c8 CN |
668 | return -EAGAIN; |
669 | } | |
670 | ||
671 | list_add(&req->list, &dev->tx_reqs_active); | |
672 | ||
673 | } | |
674 | ||
675 | spin_unlock_irqrestore(&dev->lock, flags); | |
10ca4425 | 676 | mutex_unlock(&dev->lock_printer_io); |
25a010c8 CN |
677 | |
678 | DBG(dev, "printer_write sent %d bytes\n", (int)bytes_copied); | |
679 | ||
680 | if (bytes_copied) { | |
681 | return bytes_copied; | |
682 | } else { | |
683 | return -EAGAIN; | |
684 | } | |
685 | } | |
686 | ||
687 | static int | |
02c24a82 | 688 | printer_fsync(struct file *fd, loff_t start, loff_t end, int datasync) |
25a010c8 CN |
689 | { |
690 | struct printer_dev *dev = fd->private_data; | |
496ad9aa | 691 | struct inode *inode = file_inode(fd); |
25a010c8 CN |
692 | unsigned long flags; |
693 | int tx_list_empty; | |
694 | ||
02c24a82 | 695 | mutex_lock(&inode->i_mutex); |
25a010c8 CN |
696 | spin_lock_irqsave(&dev->lock, flags); |
697 | tx_list_empty = (likely(list_empty(&dev->tx_reqs))); | |
698 | spin_unlock_irqrestore(&dev->lock, flags); | |
699 | ||
700 | if (!tx_list_empty) { | |
701 | /* Sleep until all data has been sent */ | |
702 | wait_event_interruptible(dev->tx_flush_wait, | |
703 | (likely(list_empty(&dev->tx_reqs_active)))); | |
704 | } | |
02c24a82 | 705 | mutex_unlock(&inode->i_mutex); |
25a010c8 CN |
706 | |
707 | return 0; | |
708 | } | |
709 | ||
710 | static unsigned int | |
711 | printer_poll(struct file *fd, poll_table *wait) | |
712 | { | |
713 | struct printer_dev *dev = fd->private_data; | |
714 | unsigned long flags; | |
715 | int status = 0; | |
716 | ||
10ca4425 | 717 | mutex_lock(&dev->lock_printer_io); |
cc901bbb CN |
718 | spin_lock_irqsave(&dev->lock, flags); |
719 | setup_rx_reqs(dev); | |
720 | spin_unlock_irqrestore(&dev->lock, flags); | |
10ca4425 | 721 | mutex_unlock(&dev->lock_printer_io); |
cc901bbb | 722 | |
25a010c8 CN |
723 | poll_wait(fd, &dev->rx_wait, wait); |
724 | poll_wait(fd, &dev->tx_wait, wait); | |
725 | ||
726 | spin_lock_irqsave(&dev->lock, flags); | |
727 | if (likely(!list_empty(&dev->tx_reqs))) | |
728 | status |= POLLOUT | POLLWRNORM; | |
729 | ||
cc901bbb CN |
730 | if (likely(dev->current_rx_bytes) || |
731 | likely(!list_empty(&dev->rx_buffers))) | |
25a010c8 CN |
732 | status |= POLLIN | POLLRDNORM; |
733 | ||
734 | spin_unlock_irqrestore(&dev->lock, flags); | |
735 | ||
736 | return status; | |
737 | } | |
738 | ||
44c389a0 AC |
739 | static long |
740 | printer_ioctl(struct file *fd, unsigned int code, unsigned long arg) | |
25a010c8 CN |
741 | { |
742 | struct printer_dev *dev = fd->private_data; | |
743 | unsigned long flags; | |
744 | int status = 0; | |
745 | ||
746 | DBG(dev, "printer_ioctl: cmd=0x%4.4x, arg=%lu\n", code, arg); | |
747 | ||
748 | /* handle ioctls */ | |
749 | ||
750 | spin_lock_irqsave(&dev->lock, flags); | |
751 | ||
752 | switch (code) { | |
753 | case GADGET_GET_PRINTER_STATUS: | |
754 | status = (int)dev->printer_status; | |
755 | break; | |
756 | case GADGET_SET_PRINTER_STATUS: | |
757 | dev->printer_status = (u8)arg; | |
758 | break; | |
759 | default: | |
760 | /* could not handle ioctl */ | |
761 | DBG(dev, "printer_ioctl: ERROR cmd=0x%4.4xis not supported\n", | |
762 | code); | |
763 | status = -ENOTTY; | |
764 | } | |
765 | ||
766 | spin_unlock_irqrestore(&dev->lock, flags); | |
767 | ||
768 | return status; | |
769 | } | |
770 | ||
771 | /* used after endpoint configuration */ | |
828c0950 | 772 | static const struct file_operations printer_io_operations = { |
25a010c8 CN |
773 | .owner = THIS_MODULE, |
774 | .open = printer_open, | |
775 | .read = printer_read, | |
776 | .write = printer_write, | |
777 | .fsync = printer_fsync, | |
778 | .poll = printer_poll, | |
44c389a0 | 779 | .unlocked_ioctl = printer_ioctl, |
6038f373 AB |
780 | .release = printer_close, |
781 | .llseek = noop_llseek, | |
25a010c8 CN |
782 | }; |
783 | ||
784 | /*-------------------------------------------------------------------------*/ | |
785 | ||
786 | static int | |
787 | set_printer_interface(struct printer_dev *dev) | |
788 | { | |
789 | int result = 0; | |
790 | ||
72c973dd | 791 | dev->in_ep->desc = ep_desc(dev->gadget, &hs_ep_in_desc, &fs_ep_in_desc); |
25a010c8 CN |
792 | dev->in_ep->driver_data = dev; |
793 | ||
72c973dd TB |
794 | dev->out_ep->desc = ep_desc(dev->gadget, &hs_ep_out_desc, |
795 | &fs_ep_out_desc); | |
25a010c8 CN |
796 | dev->out_ep->driver_data = dev; |
797 | ||
72c973dd | 798 | result = usb_ep_enable(dev->in_ep); |
25a010c8 CN |
799 | if (result != 0) { |
800 | DBG(dev, "enable %s --> %d\n", dev->in_ep->name, result); | |
801 | goto done; | |
802 | } | |
803 | ||
72c973dd | 804 | result = usb_ep_enable(dev->out_ep); |
25a010c8 CN |
805 | if (result != 0) { |
806 | DBG(dev, "enable %s --> %d\n", dev->in_ep->name, result); | |
807 | goto done; | |
808 | } | |
809 | ||
810 | done: | |
811 | /* on error, disable any endpoints */ | |
812 | if (result != 0) { | |
813 | (void) usb_ep_disable(dev->in_ep); | |
814 | (void) usb_ep_disable(dev->out_ep); | |
72c973dd TB |
815 | dev->in_ep->desc = NULL; |
816 | dev->out_ep->desc = NULL; | |
25a010c8 CN |
817 | } |
818 | ||
819 | /* caller is responsible for cleanup on error */ | |
820 | return result; | |
821 | } | |
822 | ||
823 | static void printer_reset_interface(struct printer_dev *dev) | |
824 | { | |
825 | if (dev->interface < 0) | |
826 | return; | |
827 | ||
441b62c1 | 828 | DBG(dev, "%s\n", __func__); |
25a010c8 | 829 | |
72c973dd | 830 | if (dev->in_ep->desc) |
25a010c8 CN |
831 | usb_ep_disable(dev->in_ep); |
832 | ||
72c973dd | 833 | if (dev->out_ep->desc) |
25a010c8 CN |
834 | usb_ep_disable(dev->out_ep); |
835 | ||
72c973dd TB |
836 | dev->in_ep->desc = NULL; |
837 | dev->out_ep->desc = NULL; | |
25a010c8 CN |
838 | dev->interface = -1; |
839 | } | |
840 | ||
25a010c8 | 841 | /* Change our operational Interface. */ |
2e87edf4 | 842 | static int set_interface(struct printer_dev *dev, unsigned number) |
25a010c8 CN |
843 | { |
844 | int result = 0; | |
845 | ||
25a010c8 | 846 | /* Free the current interface */ |
5a175bb8 | 847 | printer_reset_interface(dev); |
25a010c8 | 848 | |
5a175bb8 SAS |
849 | result = set_printer_interface(dev); |
850 | if (result) | |
851 | printer_reset_interface(dev); | |
852 | else | |
853 | dev->interface = number; | |
25a010c8 CN |
854 | |
855 | if (!result) | |
856 | INFO(dev, "Using interface %x\n", number); | |
857 | ||
858 | return result; | |
859 | } | |
860 | ||
25a010c8 CN |
861 | static void printer_soft_reset(struct printer_dev *dev) |
862 | { | |
863 | struct usb_request *req; | |
864 | ||
865 | INFO(dev, "Received Printer Reset Request\n"); | |
866 | ||
867 | if (usb_ep_disable(dev->in_ep)) | |
868 | DBG(dev, "Failed to disable USB in_ep\n"); | |
869 | if (usb_ep_disable(dev->out_ep)) | |
870 | DBG(dev, "Failed to disable USB out_ep\n"); | |
871 | ||
872 | if (dev->current_rx_req != NULL) { | |
873 | list_add(&dev->current_rx_req->list, &dev->rx_reqs); | |
874 | dev->current_rx_req = NULL; | |
875 | } | |
876 | dev->current_rx_bytes = 0; | |
877 | dev->current_rx_buf = NULL; | |
878 | dev->reset_printer = 1; | |
879 | ||
880 | while (likely(!(list_empty(&dev->rx_buffers)))) { | |
881 | req = container_of(dev->rx_buffers.next, struct usb_request, | |
882 | list); | |
883 | list_del_init(&req->list); | |
884 | list_add(&req->list, &dev->rx_reqs); | |
885 | } | |
886 | ||
887 | while (likely(!(list_empty(&dev->rx_reqs_active)))) { | |
888 | req = container_of(dev->rx_buffers.next, struct usb_request, | |
889 | list); | |
890 | list_del_init(&req->list); | |
891 | list_add(&req->list, &dev->rx_reqs); | |
892 | } | |
893 | ||
894 | while (likely(!(list_empty(&dev->tx_reqs_active)))) { | |
895 | req = container_of(dev->tx_reqs_active.next, | |
896 | struct usb_request, list); | |
897 | list_del_init(&req->list); | |
898 | list_add(&req->list, &dev->tx_reqs); | |
899 | } | |
900 | ||
72c973dd | 901 | if (usb_ep_enable(dev->in_ep)) |
25a010c8 | 902 | DBG(dev, "Failed to enable USB in_ep\n"); |
72c973dd | 903 | if (usb_ep_enable(dev->out_ep)) |
25a010c8 CN |
904 | DBG(dev, "Failed to enable USB out_ep\n"); |
905 | ||
cc901bbb | 906 | wake_up_interruptible(&dev->rx_wait); |
25a010c8 CN |
907 | wake_up_interruptible(&dev->tx_wait); |
908 | wake_up_interruptible(&dev->tx_flush_wait); | |
909 | } | |
910 | ||
911 | /*-------------------------------------------------------------------------*/ | |
912 | ||
913 | /* | |
914 | * The setup() callback implements all the ep0 functionality that's not | |
915 | * handled lower down. | |
916 | */ | |
2e87edf4 SAS |
917 | static int printer_func_setup(struct usb_function *f, |
918 | const struct usb_ctrlrequest *ctrl) | |
25a010c8 | 919 | { |
2e87edf4 SAS |
920 | struct printer_dev *dev = container_of(f, struct printer_dev, function); |
921 | struct usb_composite_dev *cdev = f->config->cdev; | |
922 | struct usb_request *req = cdev->req; | |
25a010c8 CN |
923 | int value = -EOPNOTSUPP; |
924 | u16 wIndex = le16_to_cpu(ctrl->wIndex); | |
925 | u16 wValue = le16_to_cpu(ctrl->wValue); | |
926 | u16 wLength = le16_to_cpu(ctrl->wLength); | |
927 | ||
928 | DBG(dev, "ctrl req%02x.%02x v%04x i%04x l%d\n", | |
929 | ctrl->bRequestType, ctrl->bRequest, wValue, wIndex, wLength); | |
930 | ||
25a010c8 | 931 | switch (ctrl->bRequestType&USB_TYPE_MASK) { |
25a010c8 CN |
932 | case USB_TYPE_CLASS: |
933 | switch (ctrl->bRequest) { | |
934 | case 0: /* Get the IEEE-1284 PNP String */ | |
935 | /* Only one printer interface is supported. */ | |
5a175bb8 | 936 | if ((wIndex>>8) != dev->interface) |
25a010c8 CN |
937 | break; |
938 | ||
939 | value = (pnp_string[0]<<8)|pnp_string[1]; | |
940 | memcpy(req->buf, pnp_string, value); | |
941 | DBG(dev, "1284 PNP String: %x %s\n", value, | |
942 | &pnp_string[2]); | |
943 | break; | |
944 | ||
945 | case 1: /* Get Port Status */ | |
946 | /* Only one printer interface is supported. */ | |
5a175bb8 | 947 | if (wIndex != dev->interface) |
25a010c8 CN |
948 | break; |
949 | ||
950 | *(u8 *)req->buf = dev->printer_status; | |
951 | value = min(wLength, (u16) 1); | |
952 | break; | |
953 | ||
954 | case 2: /* Soft Reset */ | |
955 | /* Only one printer interface is supported. */ | |
5a175bb8 | 956 | if (wIndex != dev->interface) |
25a010c8 CN |
957 | break; |
958 | ||
959 | printer_soft_reset(dev); | |
960 | ||
961 | value = 0; | |
962 | break; | |
963 | ||
964 | default: | |
965 | goto unknown; | |
966 | } | |
967 | break; | |
968 | ||
969 | default: | |
970 | unknown: | |
971 | VDBG(dev, | |
972 | "unknown ctrl req%02x.%02x v%04x i%04x l%d\n", | |
973 | ctrl->bRequestType, ctrl->bRequest, | |
974 | wValue, wIndex, wLength); | |
975 | break; | |
976 | } | |
25a010c8 CN |
977 | /* host either stalls (value < 0) or reports success */ |
978 | return value; | |
979 | } | |
980 | ||
2e87edf4 SAS |
981 | static int __init printer_func_bind(struct usb_configuration *c, |
982 | struct usb_function *f) | |
983 | { | |
5a175bb8 SAS |
984 | struct printer_dev *dev = container_of(f, struct printer_dev, function); |
985 | struct usb_composite_dev *cdev = c->cdev; | |
10287bae SAS |
986 | struct usb_ep *in_ep; |
987 | struct usb_ep *out_ep = NULL; | |
5a175bb8 | 988 | int id; |
10287bae | 989 | int ret; |
5a175bb8 SAS |
990 | |
991 | id = usb_interface_id(c, f); | |
992 | if (id < 0) | |
993 | return id; | |
994 | intf_desc.bInterfaceNumber = id; | |
995 | ||
996 | /* all we really need is bulk IN/OUT */ | |
997 | in_ep = usb_ep_autoconfig(cdev->gadget, &fs_ep_in_desc); | |
998 | if (!in_ep) { | |
999 | autoconf_fail: | |
1000 | dev_err(&cdev->gadget->dev, "can't autoconfigure on %s\n", | |
1001 | cdev->gadget->name); | |
1002 | return -ENODEV; | |
1003 | } | |
1004 | in_ep->driver_data = in_ep; /* claim */ | |
1005 | ||
1006 | out_ep = usb_ep_autoconfig(cdev->gadget, &fs_ep_out_desc); | |
1007 | if (!out_ep) | |
1008 | goto autoconf_fail; | |
1009 | out_ep->driver_data = out_ep; /* claim */ | |
1010 | ||
1011 | /* assumes that all endpoints are dual-speed */ | |
1012 | hs_ep_in_desc.bEndpointAddress = fs_ep_in_desc.bEndpointAddress; | |
1013 | hs_ep_out_desc.bEndpointAddress = fs_ep_out_desc.bEndpointAddress; | |
1014 | ||
10287bae SAS |
1015 | ret = usb_assign_descriptors(f, fs_printer_function, |
1016 | hs_printer_function, NULL); | |
1017 | if (ret) | |
1018 | return ret; | |
1019 | ||
5a175bb8 SAS |
1020 | dev->in_ep = in_ep; |
1021 | dev->out_ep = out_ep; | |
2e87edf4 SAS |
1022 | return 0; |
1023 | } | |
1024 | ||
1025 | static void printer_func_unbind(struct usb_configuration *c, | |
1026 | struct usb_function *f) | |
1027 | { | |
10287bae | 1028 | usb_free_all_descriptors(f); |
2e87edf4 SAS |
1029 | } |
1030 | ||
1031 | static int printer_func_set_alt(struct usb_function *f, | |
1032 | unsigned intf, unsigned alt) | |
25a010c8 | 1033 | { |
2e87edf4 SAS |
1034 | struct printer_dev *dev = container_of(f, struct printer_dev, function); |
1035 | int ret = -ENOTSUPP; | |
1036 | ||
1037 | if (!alt) | |
5a175bb8 SAS |
1038 | ret = set_interface(dev, intf); |
1039 | ||
2e87edf4 SAS |
1040 | return ret; |
1041 | } | |
1042 | ||
1043 | static void printer_func_disable(struct usb_function *f) | |
1044 | { | |
1045 | struct printer_dev *dev = container_of(f, struct printer_dev, function); | |
25a010c8 CN |
1046 | unsigned long flags; |
1047 | ||
441b62c1 | 1048 | DBG(dev, "%s\n", __func__); |
25a010c8 CN |
1049 | |
1050 | spin_lock_irqsave(&dev->lock, flags); | |
25a010c8 | 1051 | printer_reset_interface(dev); |
25a010c8 CN |
1052 | spin_unlock_irqrestore(&dev->lock, flags); |
1053 | } | |
1054 | ||
2e87edf4 | 1055 | static void printer_cfg_unbind(struct usb_configuration *c) |
25a010c8 | 1056 | { |
2e87edf4 | 1057 | struct printer_dev *dev; |
25a010c8 CN |
1058 | struct usb_request *req; |
1059 | ||
2e87edf4 | 1060 | dev = &usb_printer_gadget; |
25a010c8 | 1061 | |
441b62c1 | 1062 | DBG(dev, "%s\n", __func__); |
25a010c8 CN |
1063 | |
1064 | /* Remove sysfs files */ | |
1065 | device_destroy(usb_gadget_class, g_printer_devno); | |
1066 | ||
1067 | /* Remove Character Device */ | |
1068 | cdev_del(&dev->printer_cdev); | |
1069 | ||
1070 | /* we must already have been disconnected ... no i/o may be active */ | |
1071 | WARN_ON(!list_empty(&dev->tx_reqs_active)); | |
1072 | WARN_ON(!list_empty(&dev->rx_reqs_active)); | |
1073 | ||
1074 | /* Free all memory for this driver. */ | |
1075 | while (!list_empty(&dev->tx_reqs)) { | |
1076 | req = container_of(dev->tx_reqs.next, struct usb_request, | |
1077 | list); | |
1078 | list_del(&req->list); | |
1079 | printer_req_free(dev->in_ep, req); | |
1080 | } | |
1081 | ||
efa66f14 | 1082 | if (dev->current_rx_req != NULL) |
25a010c8 CN |
1083 | printer_req_free(dev->out_ep, dev->current_rx_req); |
1084 | ||
1085 | while (!list_empty(&dev->rx_reqs)) { | |
1086 | req = container_of(dev->rx_reqs.next, | |
1087 | struct usb_request, list); | |
1088 | list_del(&req->list); | |
1089 | printer_req_free(dev->out_ep, req); | |
1090 | } | |
1091 | ||
1092 | while (!list_empty(&dev->rx_buffers)) { | |
1093 | req = container_of(dev->rx_buffers.next, | |
1094 | struct usb_request, list); | |
1095 | list_del(&req->list); | |
1096 | printer_req_free(dev->out_ep, req); | |
1097 | } | |
25a010c8 CN |
1098 | } |
1099 | ||
2e87edf4 SAS |
1100 | static struct usb_configuration printer_cfg_driver = { |
1101 | .label = "printer", | |
1102 | .unbind = printer_cfg_unbind, | |
1103 | .bConfigurationValue = 1, | |
1104 | .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, | |
1105 | }; | |
1106 | ||
1107 | static int __init printer_bind_config(struct usb_configuration *c) | |
25a010c8 | 1108 | { |
2e87edf4 | 1109 | struct usb_gadget *gadget = c->cdev->gadget; |
25a010c8 | 1110 | struct printer_dev *dev; |
25a010c8 | 1111 | int status = -ENOMEM; |
25a010c8 CN |
1112 | size_t len; |
1113 | u32 i; | |
1114 | struct usb_request *req; | |
1115 | ||
5a175bb8 SAS |
1116 | usb_ep_autoconfig_reset(gadget); |
1117 | ||
25a010c8 CN |
1118 | dev = &usb_printer_gadget; |
1119 | ||
2e87edf4 | 1120 | dev->function.name = shortname; |
2e87edf4 SAS |
1121 | dev->function.bind = printer_func_bind; |
1122 | dev->function.setup = printer_func_setup; | |
1123 | dev->function.unbind = printer_func_unbind; | |
1124 | dev->function.set_alt = printer_func_set_alt; | |
1125 | dev->function.disable = printer_func_disable; | |
25a010c8 | 1126 | |
5a175bb8 SAS |
1127 | status = usb_add_function(c, &dev->function); |
1128 | if (status) | |
1129 | return status; | |
1130 | ||
25a010c8 | 1131 | /* Setup the sysfs files for the printer gadget. */ |
b0b090e5 GKH |
1132 | dev->pdev = device_create(usb_gadget_class, NULL, g_printer_devno, |
1133 | NULL, "g_printer"); | |
25a010c8 CN |
1134 | if (IS_ERR(dev->pdev)) { |
1135 | ERROR(dev, "Failed to create device: g_printer\n"); | |
1136 | goto fail; | |
1137 | } | |
1138 | ||
1139 | /* | |
1140 | * Register a character device as an interface to a user mode | |
1141 | * program that handles the printer specific functionality. | |
1142 | */ | |
1143 | cdev_init(&dev->printer_cdev, &printer_io_operations); | |
1144 | dev->printer_cdev.owner = THIS_MODULE; | |
1145 | status = cdev_add(&dev->printer_cdev, g_printer_devno, 1); | |
1146 | if (status) { | |
1147 | ERROR(dev, "Failed to open char device\n"); | |
1148 | goto fail; | |
1149 | } | |
1150 | ||
25a010c8 CN |
1151 | if (iPNPstring) |
1152 | strlcpy(&pnp_string[2], iPNPstring, (sizeof pnp_string)-2); | |
1153 | ||
1154 | len = strlen(pnp_string); | |
1155 | pnp_string[0] = (len >> 8) & 0xFF; | |
1156 | pnp_string[1] = len & 0xFF; | |
1157 | ||
25a010c8 CN |
1158 | usb_gadget_set_selfpowered(gadget); |
1159 | ||
1160 | if (gadget->is_otg) { | |
2e87edf4 SAS |
1161 | otg_descriptor.bmAttributes |= USB_OTG_HNP; |
1162 | printer_cfg_driver.descriptors = otg_desc; | |
1163 | printer_cfg_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
25a010c8 CN |
1164 | } |
1165 | ||
1166 | spin_lock_init(&dev->lock); | |
10ca4425 | 1167 | mutex_init(&dev->lock_printer_io); |
25a010c8 CN |
1168 | INIT_LIST_HEAD(&dev->tx_reqs); |
1169 | INIT_LIST_HEAD(&dev->tx_reqs_active); | |
1170 | INIT_LIST_HEAD(&dev->rx_reqs); | |
1171 | INIT_LIST_HEAD(&dev->rx_reqs_active); | |
1172 | INIT_LIST_HEAD(&dev->rx_buffers); | |
1173 | init_waitqueue_head(&dev->rx_wait); | |
1174 | init_waitqueue_head(&dev->tx_wait); | |
1175 | init_waitqueue_head(&dev->tx_flush_wait); | |
1176 | ||
25a010c8 CN |
1177 | dev->interface = -1; |
1178 | dev->printer_cdev_open = 0; | |
1179 | dev->printer_status = PRINTER_NOT_ERROR; | |
1180 | dev->current_rx_req = NULL; | |
1181 | dev->current_rx_bytes = 0; | |
1182 | dev->current_rx_buf = NULL; | |
1183 | ||
25a010c8 CN |
1184 | for (i = 0; i < QLEN; i++) { |
1185 | req = printer_req_alloc(dev->in_ep, USB_BUFSIZE, GFP_KERNEL); | |
1186 | if (!req) { | |
1187 | while (!list_empty(&dev->tx_reqs)) { | |
1188 | req = container_of(dev->tx_reqs.next, | |
1189 | struct usb_request, list); | |
1190 | list_del(&req->list); | |
1191 | printer_req_free(dev->in_ep, req); | |
1192 | } | |
1193 | return -ENOMEM; | |
1194 | } | |
1195 | list_add(&req->list, &dev->tx_reqs); | |
1196 | } | |
1197 | ||
1198 | for (i = 0; i < QLEN; i++) { | |
1199 | req = printer_req_alloc(dev->out_ep, USB_BUFSIZE, GFP_KERNEL); | |
1200 | if (!req) { | |
1201 | while (!list_empty(&dev->rx_reqs)) { | |
1202 | req = container_of(dev->rx_reqs.next, | |
1203 | struct usb_request, list); | |
1204 | list_del(&req->list); | |
1205 | printer_req_free(dev->out_ep, req); | |
1206 | } | |
1207 | return -ENOMEM; | |
1208 | } | |
1209 | list_add(&req->list, &dev->rx_reqs); | |
1210 | } | |
1211 | ||
25a010c8 CN |
1212 | /* finish hookup to lower layer ... */ |
1213 | dev->gadget = gadget; | |
25a010c8 CN |
1214 | |
1215 | INFO(dev, "%s, version: " DRIVER_VERSION "\n", driver_desc); | |
25a010c8 CN |
1216 | return 0; |
1217 | ||
1218 | fail: | |
2e87edf4 | 1219 | printer_cfg_unbind(c); |
25a010c8 CN |
1220 | return status; |
1221 | } | |
1222 | ||
2e87edf4 SAS |
1223 | static int printer_unbind(struct usb_composite_dev *cdev) |
1224 | { | |
1225 | return 0; | |
1226 | } | |
25a010c8 | 1227 | |
2e87edf4 SAS |
1228 | static int __init printer_bind(struct usb_composite_dev *cdev) |
1229 | { | |
5a175bb8 SAS |
1230 | int ret; |
1231 | ||
1232 | ret = usb_string_ids_tab(cdev, strings); | |
1233 | if (ret < 0) | |
1234 | return ret; | |
276e2e4f SAS |
1235 | device_desc.iManufacturer = strings[USB_GADGET_MANUFACTURER_IDX].id; |
1236 | device_desc.iProduct = strings[USB_GADGET_PRODUCT_IDX].id; | |
1237 | device_desc.iSerialNumber = strings[USB_GADGET_SERIAL_IDX].id; | |
5a175bb8 SAS |
1238 | |
1239 | ret = usb_add_config(cdev, &printer_cfg_driver, printer_bind_config); | |
7d16e8d3 SAS |
1240 | if (ret) |
1241 | return ret; | |
1242 | usb_composite_overwrite_options(cdev, &coverwrite); | |
5a175bb8 | 1243 | return ret; |
2e87edf4 | 1244 | } |
25a010c8 | 1245 | |
c2ec75c2 | 1246 | static __refdata struct usb_composite_driver printer_driver = { |
2e87edf4 SAS |
1247 | .name = shortname, |
1248 | .dev = &device_desc, | |
1249 | .strings = dev_strings, | |
1250 | .max_speed = USB_SPEED_HIGH, | |
03e42bd5 | 1251 | .bind = printer_bind, |
25a010c8 | 1252 | .unbind = printer_unbind, |
25a010c8 CN |
1253 | }; |
1254 | ||
25a010c8 CN |
1255 | static int __init |
1256 | init(void) | |
1257 | { | |
1258 | int status; | |
1259 | ||
1260 | usb_gadget_class = class_create(THIS_MODULE, "usb_printer_gadget"); | |
1261 | if (IS_ERR(usb_gadget_class)) { | |
1262 | status = PTR_ERR(usb_gadget_class); | |
2e87edf4 | 1263 | pr_err("unable to create usb_gadget class %d\n", status); |
25a010c8 CN |
1264 | return status; |
1265 | } | |
1266 | ||
1267 | status = alloc_chrdev_region(&g_printer_devno, 0, 1, | |
1268 | "USB printer gadget"); | |
1269 | if (status) { | |
2e87edf4 | 1270 | pr_err("alloc_chrdev_region %d\n", status); |
25a010c8 CN |
1271 | class_destroy(usb_gadget_class); |
1272 | return status; | |
1273 | } | |
1274 | ||
03e42bd5 | 1275 | status = usb_composite_probe(&printer_driver); |
25a010c8 CN |
1276 | if (status) { |
1277 | class_destroy(usb_gadget_class); | |
1278 | unregister_chrdev_region(g_printer_devno, 1); | |
2e87edf4 | 1279 | pr_err("usb_gadget_probe_driver %x\n", status); |
25a010c8 CN |
1280 | } |
1281 | ||
1282 | return status; | |
1283 | } | |
1284 | module_init(init); | |
1285 | ||
1286 | static void __exit | |
1287 | cleanup(void) | |
1288 | { | |
10ca4425 | 1289 | mutex_lock(&usb_printer_gadget.lock_printer_io); |
2e87edf4 | 1290 | usb_composite_unregister(&printer_driver); |
8582d861 | 1291 | unregister_chrdev_region(g_printer_devno, 1); |
d5aa4751 | 1292 | class_destroy(usb_gadget_class); |
10ca4425 | 1293 | mutex_unlock(&usb_printer_gadget.lock_printer_io); |
25a010c8 CN |
1294 | } |
1295 | module_exit(cleanup); | |
2e87edf4 SAS |
1296 | |
1297 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1298 | MODULE_AUTHOR("Craig Nadler"); | |
1299 | MODULE_LICENSE("GPL"); |