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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. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/delay.h> | |
25 | #include <linux/ioport.h> | |
26 | #include <linux/sched.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/smp_lock.h> | |
29 | #include <linux/errno.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/timer.h> | |
32 | #include <linux/list.h> | |
33 | #include <linux/interrupt.h> | |
34 | #include <linux/utsname.h> | |
35 | #include <linux/device.h> | |
36 | #include <linux/moduleparam.h> | |
37 | #include <linux/fs.h> | |
38 | #include <linux/poll.h> | |
39 | #include <linux/types.h> | |
40 | #include <linux/ctype.h> | |
41 | #include <linux/cdev.h> | |
42 | ||
43 | #include <asm/byteorder.h> | |
44 | #include <linux/io.h> | |
45 | #include <linux/irq.h> | |
46 | #include <asm/system.h> | |
47 | #include <linux/uaccess.h> | |
48 | #include <asm/unaligned.h> | |
49 | ||
50 | #include <linux/usb/ch9.h> | |
51 | #include <linux/usb/gadget.h> | |
52 | #include <linux/usb/g_printer.h> | |
53 | ||
54 | #include "gadget_chips.h" | |
55 | ||
56 | #define DRIVER_DESC "Printer Gadget" | |
57 | #define DRIVER_VERSION "2007 OCT 06" | |
58 | ||
59 | static const char shortname [] = "printer"; | |
60 | static const char driver_desc [] = DRIVER_DESC; | |
61 | ||
62 | static dev_t g_printer_devno; | |
63 | ||
64 | static struct class *usb_gadget_class; | |
65 | ||
66 | /*-------------------------------------------------------------------------*/ | |
67 | ||
68 | struct printer_dev { | |
69 | spinlock_t lock; /* lock this structure */ | |
70 | /* lock buffer lists during read/write calls */ | |
71 | spinlock_t lock_printer_io; | |
72 | struct usb_gadget *gadget; | |
73 | struct usb_request *req; /* for control responses */ | |
74 | u8 config; | |
75 | s8 interface; | |
76 | struct usb_ep *in_ep, *out_ep; | |
77 | const struct usb_endpoint_descriptor | |
78 | *in, *out; | |
79 | struct list_head rx_reqs; /* List of free RX structs */ | |
80 | struct list_head rx_reqs_active; /* List of Active RX xfers */ | |
81 | struct list_head rx_buffers; /* List of completed xfers */ | |
82 | /* wait until there is data to be read. */ | |
83 | wait_queue_head_t rx_wait; | |
84 | struct list_head tx_reqs; /* List of free TX structs */ | |
85 | struct list_head tx_reqs_active; /* List of Active TX xfers */ | |
86 | /* Wait until there are write buffers available to use. */ | |
87 | wait_queue_head_t tx_wait; | |
88 | /* Wait until all write buffers have been sent. */ | |
89 | wait_queue_head_t tx_flush_wait; | |
90 | struct usb_request *current_rx_req; | |
91 | size_t current_rx_bytes; | |
92 | u8 *current_rx_buf; | |
93 | u8 printer_status; | |
94 | u8 reset_printer; | |
25a010c8 CN |
95 | struct cdev printer_cdev; |
96 | struct device *pdev; | |
97 | u8 printer_cdev_open; | |
98 | wait_queue_head_t wait; | |
99 | }; | |
100 | ||
101 | static struct printer_dev usb_printer_gadget; | |
102 | ||
103 | /*-------------------------------------------------------------------------*/ | |
104 | ||
105 | /* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! | |
106 | * Instead: allocate your own, using normal USB-IF procedures. | |
107 | */ | |
108 | ||
109 | /* Thanks to NetChip Technologies for donating this product ID. | |
110 | */ | |
111 | #define PRINTER_VENDOR_NUM 0x0525 /* NetChip */ | |
112 | #define PRINTER_PRODUCT_NUM 0xa4a8 /* Linux-USB Printer Gadget */ | |
113 | ||
114 | /* Some systems will want different product identifers published in the | |
115 | * device descriptor, either numbers or strings or both. These string | |
116 | * parameters are in UTF-8 (superset of ASCII's 7 bit characters). | |
117 | */ | |
118 | ||
119 | static ushort __initdata idVendor; | |
120 | module_param(idVendor, ushort, S_IRUGO); | |
121 | MODULE_PARM_DESC(idVendor, "USB Vendor ID"); | |
122 | ||
123 | static ushort __initdata idProduct; | |
124 | module_param(idProduct, ushort, S_IRUGO); | |
125 | MODULE_PARM_DESC(idProduct, "USB Product ID"); | |
126 | ||
127 | static ushort __initdata bcdDevice; | |
128 | module_param(bcdDevice, ushort, S_IRUGO); | |
129 | MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)"); | |
130 | ||
131 | static char *__initdata iManufacturer; | |
132 | module_param(iManufacturer, charp, S_IRUGO); | |
133 | MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string"); | |
134 | ||
135 | static char *__initdata iProduct; | |
136 | module_param(iProduct, charp, S_IRUGO); | |
137 | MODULE_PARM_DESC(iProduct, "USB Product string"); | |
138 | ||
139 | static char *__initdata iSerialNum; | |
140 | module_param(iSerialNum, charp, S_IRUGO); | |
141 | MODULE_PARM_DESC(iSerialNum, "1"); | |
142 | ||
143 | static char *__initdata iPNPstring; | |
144 | module_param(iPNPstring, charp, S_IRUGO); | |
145 | MODULE_PARM_DESC(iPNPstring, "MFG:linux;MDL:g_printer;CLS:PRINTER;SN:1;"); | |
146 | ||
147 | /* Number of requests to allocate per endpoint, not used for ep0. */ | |
148 | static unsigned qlen = 10; | |
149 | module_param(qlen, uint, S_IRUGO|S_IWUSR); | |
150 | ||
151 | #define QLEN qlen | |
152 | ||
153 | #ifdef CONFIG_USB_GADGET_DUALSPEED | |
154 | #define DEVSPEED USB_SPEED_HIGH | |
155 | #else /* full speed (low speed doesn't do bulk) */ | |
156 | #define DEVSPEED USB_SPEED_FULL | |
157 | #endif | |
158 | ||
159 | /*-------------------------------------------------------------------------*/ | |
160 | ||
161 | #define xprintk(d, level, fmt, args...) \ | |
162 | printk(level "%s: " fmt, DRIVER_DESC, ## args) | |
163 | ||
164 | #ifdef DEBUG | |
165 | #define DBG(dev, fmt, args...) \ | |
166 | xprintk(dev, KERN_DEBUG, fmt, ## args) | |
167 | #else | |
168 | #define DBG(dev, fmt, args...) \ | |
169 | do { } while (0) | |
170 | #endif /* DEBUG */ | |
171 | ||
172 | #ifdef VERBOSE | |
173 | #define VDBG(dev, fmt, args...) \ | |
174 | xprintk(dev, KERN_DEBUG, fmt, ## args) | |
175 | #else | |
176 | #define VDBG(dev, fmt, args...) \ | |
177 | do { } while (0) | |
178 | #endif /* VERBOSE */ | |
179 | ||
180 | #define ERROR(dev, fmt, args...) \ | |
181 | xprintk(dev, KERN_ERR, fmt, ## args) | |
182 | #define WARN(dev, fmt, args...) \ | |
183 | xprintk(dev, KERN_WARNING, fmt, ## args) | |
184 | #define INFO(dev, fmt, args...) \ | |
185 | xprintk(dev, KERN_INFO, fmt, ## args) | |
186 | ||
187 | /*-------------------------------------------------------------------------*/ | |
188 | ||
189 | /* USB DRIVER HOOKUP (to the hardware driver, below us), mostly | |
190 | * ep0 implementation: descriptors, config management, setup(). | |
191 | * also optional class-specific notification interrupt transfer. | |
192 | */ | |
193 | ||
194 | /* | |
195 | * DESCRIPTORS ... most are static, but strings and (full) configuration | |
196 | * descriptors are built on demand. | |
197 | */ | |
198 | ||
199 | #define STRING_MANUFACTURER 1 | |
200 | #define STRING_PRODUCT 2 | |
201 | #define STRING_SERIALNUM 3 | |
202 | ||
203 | /* holds our biggest descriptor */ | |
204 | #define USB_DESC_BUFSIZE 256 | |
205 | #define USB_BUFSIZE 8192 | |
206 | ||
207 | /* This device advertises one configuration. */ | |
208 | #define DEV_CONFIG_VALUE 1 | |
209 | #define PRINTER_INTERFACE 0 | |
210 | ||
211 | static struct usb_device_descriptor device_desc = { | |
212 | .bLength = sizeof device_desc, | |
213 | .bDescriptorType = USB_DT_DEVICE, | |
214 | .bcdUSB = __constant_cpu_to_le16(0x0200), | |
215 | .bDeviceClass = USB_CLASS_PER_INTERFACE, | |
216 | .bDeviceSubClass = 0, | |
217 | .bDeviceProtocol = 0, | |
218 | .idVendor = __constant_cpu_to_le16(PRINTER_VENDOR_NUM), | |
219 | .idProduct = __constant_cpu_to_le16(PRINTER_PRODUCT_NUM), | |
220 | .iManufacturer = STRING_MANUFACTURER, | |
221 | .iProduct = STRING_PRODUCT, | |
222 | .iSerialNumber = STRING_SERIALNUM, | |
223 | .bNumConfigurations = 1 | |
224 | }; | |
225 | ||
226 | static struct usb_otg_descriptor otg_desc = { | |
227 | .bLength = sizeof otg_desc, | |
228 | .bDescriptorType = USB_DT_OTG, | |
229 | .bmAttributes = USB_OTG_SRP | |
230 | }; | |
231 | ||
232 | static struct usb_config_descriptor config_desc = { | |
233 | .bLength = sizeof config_desc, | |
234 | .bDescriptorType = USB_DT_CONFIG, | |
235 | ||
236 | /* compute wTotalLength on the fly */ | |
237 | .bNumInterfaces = 1, | |
238 | .bConfigurationValue = DEV_CONFIG_VALUE, | |
239 | .iConfiguration = 0, | |
240 | .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, | |
241 | .bMaxPower = 1 /* Self-Powered */ | |
242 | }; | |
243 | ||
244 | static struct usb_interface_descriptor intf_desc = { | |
245 | .bLength = sizeof intf_desc, | |
246 | .bDescriptorType = USB_DT_INTERFACE, | |
247 | .bInterfaceNumber = PRINTER_INTERFACE, | |
248 | .bNumEndpoints = 2, | |
249 | .bInterfaceClass = USB_CLASS_PRINTER, | |
250 | .bInterfaceSubClass = 1, /* Printer Sub-Class */ | |
251 | .bInterfaceProtocol = 2, /* Bi-Directional */ | |
252 | .iInterface = 0 | |
253 | }; | |
254 | ||
255 | static struct usb_endpoint_descriptor fs_ep_in_desc = { | |
256 | .bLength = USB_DT_ENDPOINT_SIZE, | |
257 | .bDescriptorType = USB_DT_ENDPOINT, | |
258 | .bEndpointAddress = USB_DIR_IN, | |
259 | .bmAttributes = USB_ENDPOINT_XFER_BULK | |
260 | }; | |
261 | ||
262 | static struct usb_endpoint_descriptor fs_ep_out_desc = { | |
263 | .bLength = USB_DT_ENDPOINT_SIZE, | |
264 | .bDescriptorType = USB_DT_ENDPOINT, | |
265 | .bEndpointAddress = USB_DIR_OUT, | |
266 | .bmAttributes = USB_ENDPOINT_XFER_BULK | |
267 | }; | |
268 | ||
269 | static const struct usb_descriptor_header *fs_printer_function [11] = { | |
270 | (struct usb_descriptor_header *) &otg_desc, | |
271 | (struct usb_descriptor_header *) &intf_desc, | |
272 | (struct usb_descriptor_header *) &fs_ep_in_desc, | |
273 | (struct usb_descriptor_header *) &fs_ep_out_desc, | |
274 | NULL | |
275 | }; | |
276 | ||
277 | #ifdef CONFIG_USB_GADGET_DUALSPEED | |
278 | ||
279 | /* | |
280 | * usb 2.0 devices need to expose both high speed and full speed | |
281 | * descriptors, unless they only run at full speed. | |
282 | */ | |
283 | ||
284 | static struct usb_endpoint_descriptor hs_ep_in_desc = { | |
285 | .bLength = USB_DT_ENDPOINT_SIZE, | |
286 | .bDescriptorType = USB_DT_ENDPOINT, | |
287 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
288 | .wMaxPacketSize = __constant_cpu_to_le16(512) | |
289 | }; | |
290 | ||
291 | static struct usb_endpoint_descriptor hs_ep_out_desc = { | |
292 | .bLength = USB_DT_ENDPOINT_SIZE, | |
293 | .bDescriptorType = USB_DT_ENDPOINT, | |
294 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
295 | .wMaxPacketSize = __constant_cpu_to_le16(512) | |
296 | }; | |
297 | ||
298 | static struct usb_qualifier_descriptor dev_qualifier = { | |
299 | .bLength = sizeof dev_qualifier, | |
300 | .bDescriptorType = USB_DT_DEVICE_QUALIFIER, | |
301 | .bcdUSB = __constant_cpu_to_le16(0x0200), | |
302 | .bDeviceClass = USB_CLASS_PRINTER, | |
303 | .bNumConfigurations = 1 | |
304 | }; | |
305 | ||
306 | static const struct usb_descriptor_header *hs_printer_function [11] = { | |
307 | (struct usb_descriptor_header *) &otg_desc, | |
308 | (struct usb_descriptor_header *) &intf_desc, | |
309 | (struct usb_descriptor_header *) &hs_ep_in_desc, | |
310 | (struct usb_descriptor_header *) &hs_ep_out_desc, | |
311 | NULL | |
312 | }; | |
313 | ||
314 | /* maxpacket and other transfer characteristics vary by speed. */ | |
315 | #define ep_desc(g, hs, fs) (((g)->speed == USB_SPEED_HIGH)?(hs):(fs)) | |
316 | ||
317 | #else | |
318 | ||
319 | /* if there's no high speed support, maxpacket doesn't change. */ | |
320 | #define ep_desc(g, hs, fs) (((void)(g)), (fs)) | |
321 | ||
322 | #endif /* !CONFIG_USB_GADGET_DUALSPEED */ | |
323 | ||
324 | /*-------------------------------------------------------------------------*/ | |
325 | ||
326 | /* descriptors that are built on-demand */ | |
327 | ||
328 | static char manufacturer [50]; | |
329 | static char product_desc [40] = DRIVER_DESC; | |
330 | static char serial_num [40] = "1"; | |
331 | static char pnp_string [1024] = | |
332 | "XXMFG:linux;MDL:g_printer;CLS:PRINTER;SN:1;"; | |
333 | ||
334 | /* static strings, in UTF-8 */ | |
335 | static struct usb_string strings [] = { | |
336 | { STRING_MANUFACTURER, manufacturer, }, | |
337 | { STRING_PRODUCT, product_desc, }, | |
338 | { STRING_SERIALNUM, serial_num, }, | |
339 | { } /* end of list */ | |
340 | }; | |
341 | ||
342 | static struct usb_gadget_strings stringtab = { | |
343 | .language = 0x0409, /* en-us */ | |
344 | .strings = strings, | |
345 | }; | |
346 | ||
347 | /*-------------------------------------------------------------------------*/ | |
348 | ||
349 | static struct usb_request * | |
350 | printer_req_alloc(struct usb_ep *ep, unsigned len, gfp_t gfp_flags) | |
351 | { | |
352 | struct usb_request *req; | |
353 | ||
354 | req = usb_ep_alloc_request(ep, gfp_flags); | |
355 | ||
356 | if (req != NULL) { | |
357 | req->length = len; | |
358 | req->buf = kmalloc(len, gfp_flags); | |
359 | if (req->buf == NULL) { | |
360 | usb_ep_free_request(ep, req); | |
361 | return NULL; | |
362 | } | |
363 | } | |
364 | ||
365 | return req; | |
366 | } | |
367 | ||
368 | static void | |
369 | printer_req_free(struct usb_ep *ep, struct usb_request *req) | |
370 | { | |
371 | if (ep != NULL && req != NULL) { | |
372 | kfree(req->buf); | |
373 | usb_ep_free_request(ep, req); | |
374 | } | |
375 | } | |
376 | ||
377 | /*-------------------------------------------------------------------------*/ | |
378 | ||
379 | static void rx_complete(struct usb_ep *ep, struct usb_request *req) | |
380 | { | |
381 | struct printer_dev *dev = ep->driver_data; | |
382 | int status = req->status; | |
383 | unsigned long flags; | |
384 | ||
385 | spin_lock_irqsave(&dev->lock, flags); | |
386 | ||
387 | list_del_init(&req->list); /* Remode from Active List */ | |
388 | ||
389 | switch (status) { | |
390 | ||
391 | /* normal completion */ | |
392 | case 0: | |
cc901bbb CN |
393 | if (req->actual > 0) { |
394 | list_add_tail(&req->list, &dev->rx_buffers); | |
395 | DBG(dev, "G_Printer : rx length %d\n", req->actual); | |
396 | } else { | |
397 | list_add(&req->list, &dev->rx_reqs); | |
398 | } | |
25a010c8 CN |
399 | break; |
400 | ||
401 | /* software-driven interface shutdown */ | |
402 | case -ECONNRESET: /* unlink */ | |
403 | case -ESHUTDOWN: /* disconnect etc */ | |
404 | VDBG(dev, "rx shutdown, code %d\n", status); | |
405 | list_add(&req->list, &dev->rx_reqs); | |
406 | break; | |
407 | ||
408 | /* for hardware automagic (such as pxa) */ | |
409 | case -ECONNABORTED: /* endpoint reset */ | |
410 | DBG(dev, "rx %s reset\n", ep->name); | |
411 | list_add(&req->list, &dev->rx_reqs); | |
412 | break; | |
413 | ||
414 | /* data overrun */ | |
415 | case -EOVERFLOW: | |
416 | /* FALLTHROUGH */ | |
417 | ||
418 | default: | |
419 | DBG(dev, "rx status %d\n", status); | |
420 | list_add(&req->list, &dev->rx_reqs); | |
421 | break; | |
422 | } | |
cc901bbb CN |
423 | |
424 | wake_up_interruptible(&dev->rx_wait); | |
25a010c8 CN |
425 | spin_unlock_irqrestore(&dev->lock, flags); |
426 | } | |
427 | ||
428 | static void tx_complete(struct usb_ep *ep, struct usb_request *req) | |
429 | { | |
430 | struct printer_dev *dev = ep->driver_data; | |
431 | ||
432 | switch (req->status) { | |
433 | default: | |
434 | VDBG(dev, "tx err %d\n", req->status); | |
435 | /* FALLTHROUGH */ | |
436 | case -ECONNRESET: /* unlink */ | |
437 | case -ESHUTDOWN: /* disconnect etc */ | |
438 | break; | |
439 | case 0: | |
440 | break; | |
441 | } | |
442 | ||
443 | spin_lock(&dev->lock); | |
444 | /* Take the request struct off the active list and put it on the | |
445 | * free list. | |
446 | */ | |
447 | list_del_init(&req->list); | |
448 | list_add(&req->list, &dev->tx_reqs); | |
449 | wake_up_interruptible(&dev->tx_wait); | |
450 | if (likely(list_empty(&dev->tx_reqs_active))) | |
451 | wake_up_interruptible(&dev->tx_flush_wait); | |
452 | ||
453 | spin_unlock(&dev->lock); | |
454 | } | |
455 | ||
456 | /*-------------------------------------------------------------------------*/ | |
457 | ||
458 | static int | |
459 | printer_open(struct inode *inode, struct file *fd) | |
460 | { | |
461 | struct printer_dev *dev; | |
462 | unsigned long flags; | |
463 | int ret = -EBUSY; | |
464 | ||
465 | dev = container_of(inode->i_cdev, struct printer_dev, printer_cdev); | |
466 | ||
467 | spin_lock_irqsave(&dev->lock, flags); | |
468 | ||
469 | if (!dev->printer_cdev_open) { | |
470 | dev->printer_cdev_open = 1; | |
471 | fd->private_data = dev; | |
472 | ret = 0; | |
473 | /* Change the printer status to show that it's on-line. */ | |
474 | dev->printer_status |= PRINTER_SELECTED; | |
475 | } | |
476 | ||
477 | spin_unlock_irqrestore(&dev->lock, flags); | |
478 | ||
479 | DBG(dev, "printer_open returned %x\n", ret); | |
480 | ||
481 | return ret; | |
482 | } | |
483 | ||
484 | static int | |
485 | printer_close(struct inode *inode, struct file *fd) | |
486 | { | |
487 | struct printer_dev *dev = fd->private_data; | |
488 | unsigned long flags; | |
489 | ||
490 | spin_lock_irqsave(&dev->lock, flags); | |
491 | dev->printer_cdev_open = 0; | |
492 | fd->private_data = NULL; | |
493 | /* Change printer status to show that the printer is off-line. */ | |
494 | dev->printer_status &= ~PRINTER_SELECTED; | |
495 | spin_unlock_irqrestore(&dev->lock, flags); | |
496 | ||
497 | DBG(dev, "printer_close\n"); | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
cc901bbb CN |
502 | /* This function must be called with interrupts turned off. */ |
503 | static void | |
504 | setup_rx_reqs(struct printer_dev *dev) | |
505 | { | |
506 | struct usb_request *req; | |
507 | ||
508 | while (likely(!list_empty(&dev->rx_reqs))) { | |
509 | int error; | |
510 | ||
511 | req = container_of(dev->rx_reqs.next, | |
512 | struct usb_request, list); | |
513 | list_del_init(&req->list); | |
514 | ||
515 | /* The USB Host sends us whatever amount of data it wants to | |
516 | * so we always set the length field to the full USB_BUFSIZE. | |
517 | * If the amount of data is more than the read() caller asked | |
518 | * for it will be stored in the request buffer until it is | |
519 | * asked for by read(). | |
520 | */ | |
521 | req->length = USB_BUFSIZE; | |
522 | req->complete = rx_complete; | |
523 | ||
524 | error = usb_ep_queue(dev->out_ep, req, GFP_ATOMIC); | |
525 | if (error) { | |
526 | DBG(dev, "rx submit --> %d\n", error); | |
527 | list_add(&req->list, &dev->rx_reqs); | |
528 | break; | |
529 | } else { | |
530 | list_add(&req->list, &dev->rx_reqs_active); | |
531 | } | |
532 | } | |
533 | } | |
534 | ||
25a010c8 CN |
535 | static ssize_t |
536 | printer_read(struct file *fd, char __user *buf, size_t len, loff_t *ptr) | |
537 | { | |
538 | struct printer_dev *dev = fd->private_data; | |
539 | unsigned long flags; | |
540 | size_t size; | |
541 | size_t bytes_copied; | |
542 | struct usb_request *req; | |
543 | /* This is a pointer to the current USB rx request. */ | |
544 | struct usb_request *current_rx_req; | |
545 | /* This is the number of bytes in the current rx buffer. */ | |
546 | size_t current_rx_bytes; | |
547 | /* This is a pointer to the current rx buffer. */ | |
548 | u8 *current_rx_buf; | |
549 | ||
550 | if (len == 0) | |
551 | return -EINVAL; | |
552 | ||
553 | DBG(dev, "printer_read trying to read %d bytes\n", (int)len); | |
554 | ||
555 | spin_lock(&dev->lock_printer_io); | |
556 | spin_lock_irqsave(&dev->lock, flags); | |
557 | ||
558 | /* We will use this flag later to check if a printer reset happened | |
559 | * after we turn interrupts back on. | |
560 | */ | |
561 | dev->reset_printer = 0; | |
562 | ||
cc901bbb | 563 | setup_rx_reqs(dev); |
25a010c8 CN |
564 | |
565 | bytes_copied = 0; | |
566 | current_rx_req = dev->current_rx_req; | |
567 | current_rx_bytes = dev->current_rx_bytes; | |
568 | current_rx_buf = dev->current_rx_buf; | |
569 | dev->current_rx_req = NULL; | |
570 | dev->current_rx_bytes = 0; | |
571 | dev->current_rx_buf = NULL; | |
572 | ||
573 | /* Check if there is any data in the read buffers. Please note that | |
574 | * current_rx_bytes is the number of bytes in the current rx buffer. | |
575 | * If it is zero then check if there are any other rx_buffers that | |
576 | * are on the completed list. We are only out of data if all rx | |
577 | * buffers are empty. | |
578 | */ | |
579 | if ((current_rx_bytes == 0) && | |
580 | (likely(list_empty(&dev->rx_buffers)))) { | |
581 | /* Turn interrupts back on before sleeping. */ | |
582 | spin_unlock_irqrestore(&dev->lock, flags); | |
583 | ||
584 | /* | |
585 | * If no data is available check if this is a NON-Blocking | |
586 | * call or not. | |
587 | */ | |
588 | if (fd->f_flags & (O_NONBLOCK|O_NDELAY)) { | |
589 | spin_unlock(&dev->lock_printer_io); | |
590 | return -EAGAIN; | |
591 | } | |
592 | ||
593 | /* Sleep until data is available */ | |
594 | wait_event_interruptible(dev->rx_wait, | |
595 | (likely(!list_empty(&dev->rx_buffers)))); | |
596 | spin_lock_irqsave(&dev->lock, flags); | |
597 | } | |
598 | ||
599 | /* We have data to return then copy it to the caller's buffer.*/ | |
600 | while ((current_rx_bytes || likely(!list_empty(&dev->rx_buffers))) | |
601 | && len) { | |
602 | if (current_rx_bytes == 0) { | |
603 | req = container_of(dev->rx_buffers.next, | |
604 | struct usb_request, list); | |
605 | list_del_init(&req->list); | |
606 | ||
607 | if (req->actual && req->buf) { | |
608 | current_rx_req = req; | |
609 | current_rx_bytes = req->actual; | |
610 | current_rx_buf = req->buf; | |
611 | } else { | |
612 | list_add(&req->list, &dev->rx_reqs); | |
613 | continue; | |
614 | } | |
615 | } | |
616 | ||
617 | /* Don't leave irqs off while doing memory copies */ | |
618 | spin_unlock_irqrestore(&dev->lock, flags); | |
619 | ||
620 | if (len > current_rx_bytes) | |
621 | size = current_rx_bytes; | |
622 | else | |
623 | size = len; | |
624 | ||
625 | size -= copy_to_user(buf, current_rx_buf, size); | |
626 | bytes_copied += size; | |
627 | len -= size; | |
628 | buf += size; | |
629 | ||
630 | spin_lock_irqsave(&dev->lock, flags); | |
631 | ||
cc901bbb | 632 | /* We've disconnected or reset so return. */ |
25a010c8 | 633 | if (dev->reset_printer) { |
cc901bbb | 634 | list_add(¤t_rx_req->list, &dev->rx_reqs); |
25a010c8 CN |
635 | spin_unlock_irqrestore(&dev->lock, flags); |
636 | spin_unlock(&dev->lock_printer_io); | |
637 | return -EAGAIN; | |
638 | } | |
639 | ||
640 | /* If we not returning all the data left in this RX request | |
641 | * buffer then adjust the amount of data left in the buffer. | |
642 | * Othewise if we are done with this RX request buffer then | |
643 | * requeue it to get any incoming data from the USB host. | |
644 | */ | |
645 | if (size < current_rx_bytes) { | |
646 | current_rx_bytes -= size; | |
647 | current_rx_buf += size; | |
648 | } else { | |
649 | list_add(¤t_rx_req->list, &dev->rx_reqs); | |
650 | current_rx_bytes = 0; | |
651 | current_rx_buf = NULL; | |
652 | current_rx_req = NULL; | |
653 | } | |
654 | } | |
655 | ||
656 | dev->current_rx_req = current_rx_req; | |
657 | dev->current_rx_bytes = current_rx_bytes; | |
658 | dev->current_rx_buf = current_rx_buf; | |
659 | ||
660 | spin_unlock_irqrestore(&dev->lock, flags); | |
661 | spin_unlock(&dev->lock_printer_io); | |
662 | ||
663 | DBG(dev, "printer_read returned %d bytes\n", (int)bytes_copied); | |
664 | ||
665 | if (bytes_copied) | |
666 | return bytes_copied; | |
667 | else | |
668 | return -EAGAIN; | |
669 | } | |
670 | ||
671 | static ssize_t | |
672 | printer_write(struct file *fd, const char __user *buf, size_t len, loff_t *ptr) | |
673 | { | |
674 | struct printer_dev *dev = fd->private_data; | |
675 | unsigned long flags; | |
676 | size_t size; /* Amount of data in a TX request. */ | |
677 | size_t bytes_copied = 0; | |
678 | struct usb_request *req; | |
679 | ||
680 | DBG(dev, "printer_write trying to send %d bytes\n", (int)len); | |
681 | ||
682 | if (len == 0) | |
683 | return -EINVAL; | |
684 | ||
685 | spin_lock(&dev->lock_printer_io); | |
686 | spin_lock_irqsave(&dev->lock, flags); | |
687 | ||
688 | /* Check if a printer reset happens while we have interrupts on */ | |
689 | dev->reset_printer = 0; | |
690 | ||
691 | /* Check if there is any available write buffers */ | |
692 | if (likely(list_empty(&dev->tx_reqs))) { | |
693 | /* Turn interrupts back on before sleeping. */ | |
694 | spin_unlock_irqrestore(&dev->lock, flags); | |
695 | ||
696 | /* | |
697 | * If write buffers are available check if this is | |
698 | * a NON-Blocking call or not. | |
699 | */ | |
700 | if (fd->f_flags & (O_NONBLOCK|O_NDELAY)) { | |
701 | spin_unlock(&dev->lock_printer_io); | |
702 | return -EAGAIN; | |
703 | } | |
704 | ||
705 | /* Sleep until a write buffer is available */ | |
706 | wait_event_interruptible(dev->tx_wait, | |
707 | (likely(!list_empty(&dev->tx_reqs)))); | |
708 | spin_lock_irqsave(&dev->lock, flags); | |
709 | } | |
710 | ||
711 | while (likely(!list_empty(&dev->tx_reqs)) && len) { | |
712 | ||
713 | if (len > USB_BUFSIZE) | |
714 | size = USB_BUFSIZE; | |
715 | else | |
716 | size = len; | |
717 | ||
718 | req = container_of(dev->tx_reqs.next, struct usb_request, | |
719 | list); | |
720 | list_del_init(&req->list); | |
721 | ||
722 | req->complete = tx_complete; | |
723 | req->length = size; | |
724 | ||
725 | /* Check if we need to send a zero length packet. */ | |
726 | if (len > size) | |
727 | /* They will be more TX requests so no yet. */ | |
728 | req->zero = 0; | |
729 | else | |
730 | /* If the data amount is not a multple of the | |
731 | * maxpacket size then send a zero length packet. | |
732 | */ | |
733 | req->zero = ((len % dev->in_ep->maxpacket) == 0); | |
734 | ||
735 | /* Don't leave irqs off while doing memory copies */ | |
736 | spin_unlock_irqrestore(&dev->lock, flags); | |
737 | ||
738 | if (copy_from_user(req->buf, buf, size)) { | |
739 | list_add(&req->list, &dev->tx_reqs); | |
740 | spin_unlock(&dev->lock_printer_io); | |
741 | return bytes_copied; | |
742 | } | |
743 | ||
744 | bytes_copied += size; | |
745 | len -= size; | |
746 | buf += size; | |
747 | ||
748 | spin_lock_irqsave(&dev->lock, flags); | |
749 | ||
750 | /* We've disconnected or reset so free the req and buffer */ | |
751 | if (dev->reset_printer) { | |
cc901bbb | 752 | list_add(&req->list, &dev->tx_reqs); |
25a010c8 CN |
753 | spin_unlock_irqrestore(&dev->lock, flags); |
754 | spin_unlock(&dev->lock_printer_io); | |
755 | return -EAGAIN; | |
756 | } | |
757 | ||
758 | if (usb_ep_queue(dev->in_ep, req, GFP_ATOMIC)) { | |
759 | list_add(&req->list, &dev->tx_reqs); | |
760 | spin_unlock_irqrestore(&dev->lock, flags); | |
761 | spin_unlock(&dev->lock_printer_io); | |
762 | return -EAGAIN; | |
763 | } | |
764 | ||
765 | list_add(&req->list, &dev->tx_reqs_active); | |
766 | ||
767 | } | |
768 | ||
769 | spin_unlock_irqrestore(&dev->lock, flags); | |
770 | spin_unlock(&dev->lock_printer_io); | |
771 | ||
772 | DBG(dev, "printer_write sent %d bytes\n", (int)bytes_copied); | |
773 | ||
774 | if (bytes_copied) { | |
775 | return bytes_copied; | |
776 | } else { | |
777 | return -EAGAIN; | |
778 | } | |
779 | } | |
780 | ||
781 | static int | |
782 | printer_fsync(struct file *fd, struct dentry *dentry, int datasync) | |
783 | { | |
784 | struct printer_dev *dev = fd->private_data; | |
785 | unsigned long flags; | |
786 | int tx_list_empty; | |
787 | ||
788 | spin_lock_irqsave(&dev->lock, flags); | |
789 | tx_list_empty = (likely(list_empty(&dev->tx_reqs))); | |
790 | spin_unlock_irqrestore(&dev->lock, flags); | |
791 | ||
792 | if (!tx_list_empty) { | |
793 | /* Sleep until all data has been sent */ | |
794 | wait_event_interruptible(dev->tx_flush_wait, | |
795 | (likely(list_empty(&dev->tx_reqs_active)))); | |
796 | } | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
801 | static unsigned int | |
802 | printer_poll(struct file *fd, poll_table *wait) | |
803 | { | |
804 | struct printer_dev *dev = fd->private_data; | |
805 | unsigned long flags; | |
806 | int status = 0; | |
807 | ||
cc901bbb CN |
808 | spin_lock(&dev->lock_printer_io); |
809 | spin_lock_irqsave(&dev->lock, flags); | |
810 | setup_rx_reqs(dev); | |
811 | spin_unlock_irqrestore(&dev->lock, flags); | |
812 | spin_unlock(&dev->lock_printer_io); | |
813 | ||
25a010c8 CN |
814 | poll_wait(fd, &dev->rx_wait, wait); |
815 | poll_wait(fd, &dev->tx_wait, wait); | |
816 | ||
817 | spin_lock_irqsave(&dev->lock, flags); | |
818 | if (likely(!list_empty(&dev->tx_reqs))) | |
819 | status |= POLLOUT | POLLWRNORM; | |
820 | ||
cc901bbb CN |
821 | if (likely(dev->current_rx_bytes) || |
822 | likely(!list_empty(&dev->rx_buffers))) | |
25a010c8 CN |
823 | status |= POLLIN | POLLRDNORM; |
824 | ||
825 | spin_unlock_irqrestore(&dev->lock, flags); | |
826 | ||
827 | return status; | |
828 | } | |
829 | ||
830 | static int | |
831 | printer_ioctl(struct inode *inode, struct file *fd, unsigned int code, | |
832 | unsigned long arg) | |
833 | { | |
834 | struct printer_dev *dev = fd->private_data; | |
835 | unsigned long flags; | |
836 | int status = 0; | |
837 | ||
838 | DBG(dev, "printer_ioctl: cmd=0x%4.4x, arg=%lu\n", code, arg); | |
839 | ||
840 | /* handle ioctls */ | |
841 | ||
842 | spin_lock_irqsave(&dev->lock, flags); | |
843 | ||
844 | switch (code) { | |
845 | case GADGET_GET_PRINTER_STATUS: | |
846 | status = (int)dev->printer_status; | |
847 | break; | |
848 | case GADGET_SET_PRINTER_STATUS: | |
849 | dev->printer_status = (u8)arg; | |
850 | break; | |
851 | default: | |
852 | /* could not handle ioctl */ | |
853 | DBG(dev, "printer_ioctl: ERROR cmd=0x%4.4xis not supported\n", | |
854 | code); | |
855 | status = -ENOTTY; | |
856 | } | |
857 | ||
858 | spin_unlock_irqrestore(&dev->lock, flags); | |
859 | ||
860 | return status; | |
861 | } | |
862 | ||
863 | /* used after endpoint configuration */ | |
864 | static struct file_operations printer_io_operations = { | |
865 | .owner = THIS_MODULE, | |
866 | .open = printer_open, | |
867 | .read = printer_read, | |
868 | .write = printer_write, | |
869 | .fsync = printer_fsync, | |
870 | .poll = printer_poll, | |
871 | .ioctl = printer_ioctl, | |
872 | .release = printer_close | |
873 | }; | |
874 | ||
875 | /*-------------------------------------------------------------------------*/ | |
876 | ||
877 | static int | |
878 | set_printer_interface(struct printer_dev *dev) | |
879 | { | |
880 | int result = 0; | |
881 | ||
882 | dev->in = ep_desc(dev->gadget, &hs_ep_in_desc, &fs_ep_in_desc); | |
883 | dev->in_ep->driver_data = dev; | |
884 | ||
885 | dev->out = ep_desc(dev->gadget, &hs_ep_out_desc, &fs_ep_out_desc); | |
886 | dev->out_ep->driver_data = dev; | |
887 | ||
888 | result = usb_ep_enable(dev->in_ep, dev->in); | |
889 | if (result != 0) { | |
890 | DBG(dev, "enable %s --> %d\n", dev->in_ep->name, result); | |
891 | goto done; | |
892 | } | |
893 | ||
894 | result = usb_ep_enable(dev->out_ep, dev->out); | |
895 | if (result != 0) { | |
896 | DBG(dev, "enable %s --> %d\n", dev->in_ep->name, result); | |
897 | goto done; | |
898 | } | |
899 | ||
900 | done: | |
901 | /* on error, disable any endpoints */ | |
902 | if (result != 0) { | |
903 | (void) usb_ep_disable(dev->in_ep); | |
904 | (void) usb_ep_disable(dev->out_ep); | |
905 | dev->in = NULL; | |
906 | dev->out = NULL; | |
907 | } | |
908 | ||
909 | /* caller is responsible for cleanup on error */ | |
910 | return result; | |
911 | } | |
912 | ||
913 | static void printer_reset_interface(struct printer_dev *dev) | |
914 | { | |
915 | if (dev->interface < 0) | |
916 | return; | |
917 | ||
918 | DBG(dev, "%s\n", __FUNCTION__); | |
919 | ||
920 | if (dev->in) | |
921 | usb_ep_disable(dev->in_ep); | |
922 | ||
923 | if (dev->out) | |
924 | usb_ep_disable(dev->out_ep); | |
925 | ||
926 | dev->interface = -1; | |
927 | } | |
928 | ||
929 | /* change our operational config. must agree with the code | |
930 | * that returns config descriptors, and altsetting code. | |
931 | */ | |
932 | static int | |
933 | printer_set_config(struct printer_dev *dev, unsigned number) | |
934 | { | |
935 | int result = 0; | |
936 | struct usb_gadget *gadget = dev->gadget; | |
937 | ||
938 | if (gadget_is_sa1100(gadget) && dev->config) { | |
939 | /* tx fifo is full, but we can't clear it...*/ | |
940 | INFO(dev, "can't change configurations\n"); | |
941 | return -ESPIPE; | |
942 | } | |
943 | ||
944 | switch (number) { | |
945 | case DEV_CONFIG_VALUE: | |
946 | result = 0; | |
947 | break; | |
948 | default: | |
949 | result = -EINVAL; | |
950 | /* FALL THROUGH */ | |
951 | case 0: | |
952 | break; | |
953 | } | |
954 | ||
955 | if (result) { | |
956 | usb_gadget_vbus_draw(dev->gadget, | |
957 | dev->gadget->is_otg ? 8 : 100); | |
958 | } else { | |
959 | char *speed; | |
960 | unsigned power; | |
961 | ||
962 | power = 2 * config_desc.bMaxPower; | |
963 | usb_gadget_vbus_draw(dev->gadget, power); | |
964 | ||
965 | switch (gadget->speed) { | |
966 | case USB_SPEED_FULL: speed = "full"; break; | |
967 | #ifdef CONFIG_USB_GADGET_DUALSPEED | |
968 | case USB_SPEED_HIGH: speed = "high"; break; | |
969 | #endif | |
970 | default: speed = "?"; break; | |
971 | } | |
972 | ||
973 | dev->config = number; | |
974 | INFO(dev, "%s speed config #%d: %d mA, %s\n", | |
975 | speed, number, power, driver_desc); | |
976 | } | |
977 | return result; | |
978 | } | |
979 | ||
980 | static int | |
981 | config_buf(enum usb_device_speed speed, u8 *buf, u8 type, unsigned index, | |
982 | int is_otg) | |
983 | { | |
984 | int len; | |
985 | const struct usb_descriptor_header **function; | |
986 | #ifdef CONFIG_USB_GADGET_DUALSPEED | |
987 | int hs = (speed == USB_SPEED_HIGH); | |
988 | ||
989 | if (type == USB_DT_OTHER_SPEED_CONFIG) | |
990 | hs = !hs; | |
991 | ||
992 | if (hs) { | |
993 | function = hs_printer_function; | |
994 | } else { | |
995 | function = fs_printer_function; | |
996 | } | |
997 | #else | |
998 | function = fs_printer_function; | |
999 | #endif | |
1000 | ||
1001 | if (index >= device_desc.bNumConfigurations) | |
1002 | return -EINVAL; | |
1003 | ||
1004 | /* for now, don't advertise srp-only devices */ | |
1005 | if (!is_otg) | |
1006 | function++; | |
1007 | ||
1008 | len = usb_gadget_config_buf(&config_desc, buf, USB_DESC_BUFSIZE, | |
1009 | function); | |
1010 | if (len < 0) | |
1011 | return len; | |
1012 | ((struct usb_config_descriptor *) buf)->bDescriptorType = type; | |
1013 | return len; | |
1014 | } | |
1015 | ||
1016 | /* Change our operational Interface. */ | |
1017 | static int | |
1018 | set_interface(struct printer_dev *dev, unsigned number) | |
1019 | { | |
1020 | int result = 0; | |
1021 | ||
1022 | if (gadget_is_sa1100(dev->gadget) && dev->interface < 0) { | |
1023 | /* tx fifo is full, but we can't clear it...*/ | |
1024 | INFO(dev, "can't change interfaces\n"); | |
1025 | return -ESPIPE; | |
1026 | } | |
1027 | ||
1028 | /* Free the current interface */ | |
1029 | switch (dev->interface) { | |
1030 | case PRINTER_INTERFACE: | |
1031 | printer_reset_interface(dev); | |
1032 | break; | |
1033 | } | |
1034 | ||
1035 | switch (number) { | |
1036 | case PRINTER_INTERFACE: | |
1037 | result = set_printer_interface(dev); | |
1038 | if (result) { | |
1039 | printer_reset_interface(dev); | |
1040 | } else { | |
1041 | dev->interface = PRINTER_INTERFACE; | |
1042 | } | |
1043 | break; | |
1044 | default: | |
1045 | result = -EINVAL; | |
1046 | /* FALL THROUGH */ | |
1047 | } | |
1048 | ||
1049 | if (!result) | |
1050 | INFO(dev, "Using interface %x\n", number); | |
1051 | ||
1052 | return result; | |
1053 | } | |
1054 | ||
1055 | static void printer_setup_complete(struct usb_ep *ep, struct usb_request *req) | |
1056 | { | |
1057 | if (req->status || req->actual != req->length) | |
1058 | DBG((struct printer_dev *) ep->driver_data, | |
1059 | "setup complete --> %d, %d/%d\n", | |
1060 | req->status, req->actual, req->length); | |
1061 | } | |
1062 | ||
1063 | static void printer_soft_reset(struct printer_dev *dev) | |
1064 | { | |
1065 | struct usb_request *req; | |
1066 | ||
1067 | INFO(dev, "Received Printer Reset Request\n"); | |
1068 | ||
1069 | if (usb_ep_disable(dev->in_ep)) | |
1070 | DBG(dev, "Failed to disable USB in_ep\n"); | |
1071 | if (usb_ep_disable(dev->out_ep)) | |
1072 | DBG(dev, "Failed to disable USB out_ep\n"); | |
1073 | ||
1074 | if (dev->current_rx_req != NULL) { | |
1075 | list_add(&dev->current_rx_req->list, &dev->rx_reqs); | |
1076 | dev->current_rx_req = NULL; | |
1077 | } | |
1078 | dev->current_rx_bytes = 0; | |
1079 | dev->current_rx_buf = NULL; | |
1080 | dev->reset_printer = 1; | |
1081 | ||
1082 | while (likely(!(list_empty(&dev->rx_buffers)))) { | |
1083 | req = container_of(dev->rx_buffers.next, struct usb_request, | |
1084 | list); | |
1085 | list_del_init(&req->list); | |
1086 | list_add(&req->list, &dev->rx_reqs); | |
1087 | } | |
1088 | ||
1089 | while (likely(!(list_empty(&dev->rx_reqs_active)))) { | |
1090 | req = container_of(dev->rx_buffers.next, struct usb_request, | |
1091 | list); | |
1092 | list_del_init(&req->list); | |
1093 | list_add(&req->list, &dev->rx_reqs); | |
1094 | } | |
1095 | ||
1096 | while (likely(!(list_empty(&dev->tx_reqs_active)))) { | |
1097 | req = container_of(dev->tx_reqs_active.next, | |
1098 | struct usb_request, list); | |
1099 | list_del_init(&req->list); | |
1100 | list_add(&req->list, &dev->tx_reqs); | |
1101 | } | |
1102 | ||
1103 | if (usb_ep_enable(dev->in_ep, dev->in)) | |
1104 | DBG(dev, "Failed to enable USB in_ep\n"); | |
1105 | if (usb_ep_enable(dev->out_ep, dev->out)) | |
1106 | DBG(dev, "Failed to enable USB out_ep\n"); | |
1107 | ||
cc901bbb | 1108 | wake_up_interruptible(&dev->rx_wait); |
25a010c8 CN |
1109 | wake_up_interruptible(&dev->tx_wait); |
1110 | wake_up_interruptible(&dev->tx_flush_wait); | |
1111 | } | |
1112 | ||
1113 | /*-------------------------------------------------------------------------*/ | |
1114 | ||
1115 | /* | |
1116 | * The setup() callback implements all the ep0 functionality that's not | |
1117 | * handled lower down. | |
1118 | */ | |
1119 | static int | |
1120 | printer_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) | |
1121 | { | |
1122 | struct printer_dev *dev = get_gadget_data(gadget); | |
1123 | struct usb_request *req = dev->req; | |
1124 | int value = -EOPNOTSUPP; | |
1125 | u16 wIndex = le16_to_cpu(ctrl->wIndex); | |
1126 | u16 wValue = le16_to_cpu(ctrl->wValue); | |
1127 | u16 wLength = le16_to_cpu(ctrl->wLength); | |
1128 | ||
1129 | DBG(dev, "ctrl req%02x.%02x v%04x i%04x l%d\n", | |
1130 | ctrl->bRequestType, ctrl->bRequest, wValue, wIndex, wLength); | |
1131 | ||
1132 | req->complete = printer_setup_complete; | |
1133 | ||
1134 | switch (ctrl->bRequestType&USB_TYPE_MASK) { | |
1135 | ||
1136 | case USB_TYPE_STANDARD: | |
1137 | switch (ctrl->bRequest) { | |
1138 | ||
1139 | case USB_REQ_GET_DESCRIPTOR: | |
1140 | if (ctrl->bRequestType != USB_DIR_IN) | |
1141 | break; | |
1142 | switch (wValue >> 8) { | |
1143 | ||
1144 | case USB_DT_DEVICE: | |
1145 | value = min(wLength, (u16) sizeof device_desc); | |
1146 | memcpy(req->buf, &device_desc, value); | |
1147 | break; | |
1148 | #ifdef CONFIG_USB_GADGET_DUALSPEED | |
1149 | case USB_DT_DEVICE_QUALIFIER: | |
1150 | if (!gadget->is_dualspeed) | |
1151 | break; | |
1152 | value = min(wLength, | |
1153 | (u16) sizeof dev_qualifier); | |
1154 | memcpy(req->buf, &dev_qualifier, value); | |
1155 | break; | |
1156 | ||
1157 | case USB_DT_OTHER_SPEED_CONFIG: | |
1158 | if (!gadget->is_dualspeed) | |
1159 | break; | |
1160 | /* FALLTHROUGH */ | |
1161 | #endif /* CONFIG_USB_GADGET_DUALSPEED */ | |
1162 | case USB_DT_CONFIG: | |
1163 | value = config_buf(gadget->speed, req->buf, | |
1164 | wValue >> 8, | |
1165 | wValue & 0xff, | |
1166 | gadget->is_otg); | |
1167 | if (value >= 0) | |
1168 | value = min(wLength, (u16) value); | |
1169 | break; | |
1170 | ||
1171 | case USB_DT_STRING: | |
1172 | value = usb_gadget_get_string(&stringtab, | |
1173 | wValue & 0xff, req->buf); | |
1174 | if (value >= 0) | |
1175 | value = min(wLength, (u16) value); | |
1176 | break; | |
1177 | } | |
1178 | break; | |
1179 | ||
1180 | case USB_REQ_SET_CONFIGURATION: | |
1181 | if (ctrl->bRequestType != 0) | |
1182 | break; | |
1183 | if (gadget->a_hnp_support) | |
1184 | DBG(dev, "HNP available\n"); | |
1185 | else if (gadget->a_alt_hnp_support) | |
1186 | DBG(dev, "HNP needs a different root port\n"); | |
1187 | value = printer_set_config(dev, wValue); | |
1188 | break; | |
1189 | case USB_REQ_GET_CONFIGURATION: | |
1190 | if (ctrl->bRequestType != USB_DIR_IN) | |
1191 | break; | |
1192 | *(u8 *)req->buf = dev->config; | |
1193 | value = min(wLength, (u16) 1); | |
1194 | break; | |
1195 | ||
1196 | case USB_REQ_SET_INTERFACE: | |
1197 | if (ctrl->bRequestType != USB_RECIP_INTERFACE || | |
1198 | !dev->config) | |
1199 | break; | |
1200 | ||
1201 | value = set_interface(dev, PRINTER_INTERFACE); | |
1202 | break; | |
1203 | case USB_REQ_GET_INTERFACE: | |
1204 | if (ctrl->bRequestType != | |
1205 | (USB_DIR_IN|USB_RECIP_INTERFACE) | |
1206 | || !dev->config) | |
1207 | break; | |
1208 | ||
1209 | *(u8 *)req->buf = dev->interface; | |
1210 | value = min(wLength, (u16) 1); | |
1211 | break; | |
1212 | ||
1213 | default: | |
1214 | goto unknown; | |
1215 | } | |
1216 | break; | |
1217 | ||
1218 | case USB_TYPE_CLASS: | |
1219 | switch (ctrl->bRequest) { | |
1220 | case 0: /* Get the IEEE-1284 PNP String */ | |
1221 | /* Only one printer interface is supported. */ | |
1222 | if ((wIndex>>8) != PRINTER_INTERFACE) | |
1223 | break; | |
1224 | ||
1225 | value = (pnp_string[0]<<8)|pnp_string[1]; | |
1226 | memcpy(req->buf, pnp_string, value); | |
1227 | DBG(dev, "1284 PNP String: %x %s\n", value, | |
1228 | &pnp_string[2]); | |
1229 | break; | |
1230 | ||
1231 | case 1: /* Get Port Status */ | |
1232 | /* Only one printer interface is supported. */ | |
1233 | if (wIndex != PRINTER_INTERFACE) | |
1234 | break; | |
1235 | ||
1236 | *(u8 *)req->buf = dev->printer_status; | |
1237 | value = min(wLength, (u16) 1); | |
1238 | break; | |
1239 | ||
1240 | case 2: /* Soft Reset */ | |
1241 | /* Only one printer interface is supported. */ | |
1242 | if (wIndex != PRINTER_INTERFACE) | |
1243 | break; | |
1244 | ||
1245 | printer_soft_reset(dev); | |
1246 | ||
1247 | value = 0; | |
1248 | break; | |
1249 | ||
1250 | default: | |
1251 | goto unknown; | |
1252 | } | |
1253 | break; | |
1254 | ||
1255 | default: | |
1256 | unknown: | |
1257 | VDBG(dev, | |
1258 | "unknown ctrl req%02x.%02x v%04x i%04x l%d\n", | |
1259 | ctrl->bRequestType, ctrl->bRequest, | |
1260 | wValue, wIndex, wLength); | |
1261 | break; | |
1262 | } | |
1263 | ||
1264 | /* respond with data transfer before status phase? */ | |
1265 | if (value >= 0) { | |
1266 | req->length = value; | |
1267 | req->zero = value < wLength | |
1268 | && (value % gadget->ep0->maxpacket) == 0; | |
1269 | value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC); | |
1270 | if (value < 0) { | |
1271 | DBG(dev, "ep_queue --> %d\n", value); | |
1272 | req->status = 0; | |
1273 | printer_setup_complete(gadget->ep0, req); | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | /* host either stalls (value < 0) or reports success */ | |
1278 | return value; | |
1279 | } | |
1280 | ||
1281 | static void | |
1282 | printer_disconnect(struct usb_gadget *gadget) | |
1283 | { | |
1284 | struct printer_dev *dev = get_gadget_data(gadget); | |
1285 | unsigned long flags; | |
1286 | ||
1287 | DBG(dev, "%s\n", __FUNCTION__); | |
1288 | ||
1289 | spin_lock_irqsave(&dev->lock, flags); | |
1290 | ||
1291 | printer_reset_interface(dev); | |
1292 | ||
1293 | spin_unlock_irqrestore(&dev->lock, flags); | |
1294 | } | |
1295 | ||
1296 | static void | |
1297 | printer_unbind(struct usb_gadget *gadget) | |
1298 | { | |
1299 | struct printer_dev *dev = get_gadget_data(gadget); | |
1300 | struct usb_request *req; | |
1301 | ||
1302 | ||
1303 | DBG(dev, "%s\n", __FUNCTION__); | |
1304 | ||
1305 | /* Remove sysfs files */ | |
1306 | device_destroy(usb_gadget_class, g_printer_devno); | |
1307 | ||
1308 | /* Remove Character Device */ | |
1309 | cdev_del(&dev->printer_cdev); | |
1310 | ||
1311 | /* we must already have been disconnected ... no i/o may be active */ | |
1312 | WARN_ON(!list_empty(&dev->tx_reqs_active)); | |
1313 | WARN_ON(!list_empty(&dev->rx_reqs_active)); | |
1314 | ||
1315 | /* Free all memory for this driver. */ | |
1316 | while (!list_empty(&dev->tx_reqs)) { | |
1317 | req = container_of(dev->tx_reqs.next, struct usb_request, | |
1318 | list); | |
1319 | list_del(&req->list); | |
1320 | printer_req_free(dev->in_ep, req); | |
1321 | } | |
1322 | ||
efa66f14 | 1323 | if (dev->current_rx_req != NULL) |
25a010c8 CN |
1324 | printer_req_free(dev->out_ep, dev->current_rx_req); |
1325 | ||
1326 | while (!list_empty(&dev->rx_reqs)) { | |
1327 | req = container_of(dev->rx_reqs.next, | |
1328 | struct usb_request, list); | |
1329 | list_del(&req->list); | |
1330 | printer_req_free(dev->out_ep, req); | |
1331 | } | |
1332 | ||
1333 | while (!list_empty(&dev->rx_buffers)) { | |
1334 | req = container_of(dev->rx_buffers.next, | |
1335 | struct usb_request, list); | |
1336 | list_del(&req->list); | |
1337 | printer_req_free(dev->out_ep, req); | |
1338 | } | |
1339 | ||
1340 | if (dev->req) { | |
1341 | printer_req_free(gadget->ep0, dev->req); | |
1342 | dev->req = NULL; | |
1343 | } | |
1344 | ||
1345 | set_gadget_data(gadget, NULL); | |
1346 | } | |
1347 | ||
1348 | static int __init | |
1349 | printer_bind(struct usb_gadget *gadget) | |
1350 | { | |
1351 | struct printer_dev *dev; | |
1352 | struct usb_ep *in_ep, *out_ep; | |
1353 | int status = -ENOMEM; | |
1354 | int gcnum; | |
1355 | size_t len; | |
1356 | u32 i; | |
1357 | struct usb_request *req; | |
1358 | ||
1359 | dev = &usb_printer_gadget; | |
1360 | ||
1361 | ||
1362 | /* Setup the sysfs files for the printer gadget. */ | |
1363 | dev->pdev = device_create(usb_gadget_class, NULL, g_printer_devno, | |
1364 | "g_printer"); | |
1365 | if (IS_ERR(dev->pdev)) { | |
1366 | ERROR(dev, "Failed to create device: g_printer\n"); | |
1367 | goto fail; | |
1368 | } | |
1369 | ||
1370 | /* | |
1371 | * Register a character device as an interface to a user mode | |
1372 | * program that handles the printer specific functionality. | |
1373 | */ | |
1374 | cdev_init(&dev->printer_cdev, &printer_io_operations); | |
1375 | dev->printer_cdev.owner = THIS_MODULE; | |
1376 | status = cdev_add(&dev->printer_cdev, g_printer_devno, 1); | |
1377 | if (status) { | |
1378 | ERROR(dev, "Failed to open char device\n"); | |
1379 | goto fail; | |
1380 | } | |
1381 | ||
1382 | if (gadget_is_sa1100(gadget)) { | |
1383 | /* hardware can't write zero length packets. */ | |
1384 | ERROR(dev, "SA1100 controller is unsupport by this driver\n"); | |
1385 | goto fail; | |
1386 | } | |
1387 | ||
1388 | gcnum = usb_gadget_controller_number(gadget); | |
1389 | if (gcnum >= 0) { | |
1390 | device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum); | |
1391 | } else { | |
1392 | dev_warn(&gadget->dev, "controller '%s' not recognized\n", | |
1393 | gadget->name); | |
1394 | /* unrecognized, but safe unless bulk is REALLY quirky */ | |
1395 | device_desc.bcdDevice = | |
1396 | __constant_cpu_to_le16(0xFFFF); | |
1397 | } | |
1398 | snprintf(manufacturer, sizeof(manufacturer), "%s %s with %s", | |
1399 | init_utsname()->sysname, init_utsname()->release, | |
1400 | gadget->name); | |
1401 | ||
1402 | device_desc.idVendor = | |
1403 | __constant_cpu_to_le16(PRINTER_VENDOR_NUM); | |
1404 | device_desc.idProduct = | |
1405 | __constant_cpu_to_le16(PRINTER_PRODUCT_NUM); | |
1406 | ||
1407 | /* support optional vendor/distro customization */ | |
1408 | if (idVendor) { | |
1409 | if (!idProduct) { | |
1410 | dev_err(&gadget->dev, "idVendor needs idProduct!\n"); | |
1411 | return -ENODEV; | |
1412 | } | |
1413 | device_desc.idVendor = cpu_to_le16(idVendor); | |
1414 | device_desc.idProduct = cpu_to_le16(idProduct); | |
1415 | if (bcdDevice) | |
1416 | device_desc.bcdDevice = cpu_to_le16(bcdDevice); | |
1417 | } | |
1418 | ||
1419 | if (iManufacturer) | |
1420 | strlcpy(manufacturer, iManufacturer, sizeof manufacturer); | |
1421 | ||
1422 | if (iProduct) | |
1423 | strlcpy(product_desc, iProduct, sizeof product_desc); | |
1424 | ||
1425 | if (iSerialNum) | |
1426 | strlcpy(serial_num, iSerialNum, sizeof serial_num); | |
1427 | ||
1428 | if (iPNPstring) | |
1429 | strlcpy(&pnp_string[2], iPNPstring, (sizeof pnp_string)-2); | |
1430 | ||
1431 | len = strlen(pnp_string); | |
1432 | pnp_string[0] = (len >> 8) & 0xFF; | |
1433 | pnp_string[1] = len & 0xFF; | |
1434 | ||
1435 | /* all we really need is bulk IN/OUT */ | |
1436 | usb_ep_autoconfig_reset(gadget); | |
1437 | in_ep = usb_ep_autoconfig(gadget, &fs_ep_in_desc); | |
1438 | if (!in_ep) { | |
1439 | autoconf_fail: | |
1440 | dev_err(&gadget->dev, "can't autoconfigure on %s\n", | |
1441 | gadget->name); | |
1442 | return -ENODEV; | |
1443 | } | |
1444 | in_ep->driver_data = in_ep; /* claim */ | |
1445 | ||
1446 | out_ep = usb_ep_autoconfig(gadget, &fs_ep_out_desc); | |
1447 | if (!out_ep) | |
1448 | goto autoconf_fail; | |
1449 | out_ep->driver_data = out_ep; /* claim */ | |
1450 | ||
1451 | #ifdef CONFIG_USB_GADGET_DUALSPEED | |
1452 | /* assumes ep0 uses the same value for both speeds ... */ | |
1453 | dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0; | |
1454 | ||
1455 | /* and that all endpoints are dual-speed */ | |
1456 | hs_ep_in_desc.bEndpointAddress = fs_ep_in_desc.bEndpointAddress; | |
1457 | hs_ep_out_desc.bEndpointAddress = fs_ep_out_desc.bEndpointAddress; | |
1458 | #endif /* DUALSPEED */ | |
1459 | ||
1460 | device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket; | |
1461 | usb_gadget_set_selfpowered(gadget); | |
1462 | ||
1463 | if (gadget->is_otg) { | |
1464 | otg_desc.bmAttributes |= USB_OTG_HNP, | |
1465 | config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
1466 | config_desc.bMaxPower = 4; | |
1467 | } | |
1468 | ||
1469 | spin_lock_init(&dev->lock); | |
1470 | spin_lock_init(&dev->lock_printer_io); | |
1471 | INIT_LIST_HEAD(&dev->tx_reqs); | |
1472 | INIT_LIST_HEAD(&dev->tx_reqs_active); | |
1473 | INIT_LIST_HEAD(&dev->rx_reqs); | |
1474 | INIT_LIST_HEAD(&dev->rx_reqs_active); | |
1475 | INIT_LIST_HEAD(&dev->rx_buffers); | |
1476 | init_waitqueue_head(&dev->rx_wait); | |
1477 | init_waitqueue_head(&dev->tx_wait); | |
1478 | init_waitqueue_head(&dev->tx_flush_wait); | |
1479 | ||
1480 | dev->config = 0; | |
1481 | dev->interface = -1; | |
1482 | dev->printer_cdev_open = 0; | |
1483 | dev->printer_status = PRINTER_NOT_ERROR; | |
1484 | dev->current_rx_req = NULL; | |
1485 | dev->current_rx_bytes = 0; | |
1486 | dev->current_rx_buf = NULL; | |
1487 | ||
1488 | dev->in_ep = in_ep; | |
1489 | dev->out_ep = out_ep; | |
1490 | ||
1491 | /* preallocate control message data and buffer */ | |
1492 | dev->req = printer_req_alloc(gadget->ep0, USB_DESC_BUFSIZE, | |
1493 | GFP_KERNEL); | |
1494 | if (!dev->req) { | |
1495 | status = -ENOMEM; | |
1496 | goto fail; | |
1497 | } | |
1498 | ||
1499 | for (i = 0; i < QLEN; i++) { | |
1500 | req = printer_req_alloc(dev->in_ep, USB_BUFSIZE, GFP_KERNEL); | |
1501 | if (!req) { | |
1502 | while (!list_empty(&dev->tx_reqs)) { | |
1503 | req = container_of(dev->tx_reqs.next, | |
1504 | struct usb_request, list); | |
1505 | list_del(&req->list); | |
1506 | printer_req_free(dev->in_ep, req); | |
1507 | } | |
1508 | return -ENOMEM; | |
1509 | } | |
1510 | list_add(&req->list, &dev->tx_reqs); | |
1511 | } | |
1512 | ||
1513 | for (i = 0; i < QLEN; i++) { | |
1514 | req = printer_req_alloc(dev->out_ep, USB_BUFSIZE, GFP_KERNEL); | |
1515 | if (!req) { | |
1516 | while (!list_empty(&dev->rx_reqs)) { | |
1517 | req = container_of(dev->rx_reqs.next, | |
1518 | struct usb_request, list); | |
1519 | list_del(&req->list); | |
1520 | printer_req_free(dev->out_ep, req); | |
1521 | } | |
1522 | return -ENOMEM; | |
1523 | } | |
1524 | list_add(&req->list, &dev->rx_reqs); | |
1525 | } | |
1526 | ||
1527 | dev->req->complete = printer_setup_complete; | |
1528 | ||
1529 | /* finish hookup to lower layer ... */ | |
1530 | dev->gadget = gadget; | |
1531 | set_gadget_data(gadget, dev); | |
1532 | gadget->ep0->driver_data = dev; | |
1533 | ||
1534 | INFO(dev, "%s, version: " DRIVER_VERSION "\n", driver_desc); | |
1535 | INFO(dev, "using %s, OUT %s IN %s\n", gadget->name, out_ep->name, | |
1536 | in_ep->name); | |
1537 | ||
1538 | return 0; | |
1539 | ||
1540 | fail: | |
1541 | printer_unbind(gadget); | |
1542 | return status; | |
1543 | } | |
1544 | ||
1545 | /*-------------------------------------------------------------------------*/ | |
1546 | ||
1547 | static struct usb_gadget_driver printer_driver = { | |
1548 | .speed = DEVSPEED, | |
1549 | ||
1550 | .function = (char *) driver_desc, | |
1551 | .bind = printer_bind, | |
1552 | .unbind = printer_unbind, | |
1553 | ||
1554 | .setup = printer_setup, | |
1555 | .disconnect = printer_disconnect, | |
1556 | ||
1557 | .driver = { | |
1558 | .name = (char *) shortname, | |
1559 | .owner = THIS_MODULE, | |
1560 | }, | |
1561 | }; | |
1562 | ||
1563 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1564 | MODULE_AUTHOR("Craig Nadler"); | |
1565 | MODULE_LICENSE("GPL"); | |
1566 | ||
1567 | static int __init | |
1568 | init(void) | |
1569 | { | |
1570 | int status; | |
1571 | ||
1572 | usb_gadget_class = class_create(THIS_MODULE, "usb_printer_gadget"); | |
1573 | if (IS_ERR(usb_gadget_class)) { | |
1574 | status = PTR_ERR(usb_gadget_class); | |
1575 | ERROR(dev, "unable to create usb_gadget class %d\n", status); | |
1576 | return status; | |
1577 | } | |
1578 | ||
1579 | status = alloc_chrdev_region(&g_printer_devno, 0, 1, | |
1580 | "USB printer gadget"); | |
1581 | if (status) { | |
1582 | ERROR(dev, "alloc_chrdev_region %d\n", status); | |
1583 | class_destroy(usb_gadget_class); | |
1584 | return status; | |
1585 | } | |
1586 | ||
1587 | status = usb_gadget_register_driver(&printer_driver); | |
1588 | if (status) { | |
1589 | class_destroy(usb_gadget_class); | |
1590 | unregister_chrdev_region(g_printer_devno, 1); | |
1591 | DBG(dev, "usb_gadget_register_driver %x\n", status); | |
1592 | } | |
1593 | ||
1594 | return status; | |
1595 | } | |
1596 | module_init(init); | |
1597 | ||
1598 | static void __exit | |
1599 | cleanup(void) | |
1600 | { | |
1601 | int status; | |
1602 | ||
1603 | spin_lock(&usb_printer_gadget.lock_printer_io); | |
1604 | class_destroy(usb_gadget_class); | |
1605 | unregister_chrdev_region(g_printer_devno, 2); | |
1606 | ||
1607 | status = usb_gadget_unregister_driver(&printer_driver); | |
1608 | if (status) | |
1609 | ERROR(dev, "usb_gadget_unregister_driver %x\n", status); | |
1610 | ||
1611 | spin_unlock(&usb_printer_gadget.lock_printer_io); | |
1612 | } | |
1613 | module_exit(cleanup); |