Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 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 | |
David Brownell | 0a56b03 | 2008-08-18 17:42:49 -0700 | [diff] [blame^] | 56 | |
| 57 | /* |
| 58 | * Kbuild is not very cooperative with respect to linking separately |
| 59 | * compiled library objects into one module. So for now we won't use |
| 60 | * separate compilation ... ensuring init/exit sections work to shrink |
| 61 | * the runtime footprint, and giving us at least some parts of what |
| 62 | * a "gcc --combine ... part1.c part2.c part3.c ... " build would. |
| 63 | */ |
| 64 | #include "usbstring.c" |
| 65 | #include "config.c" |
| 66 | #include "epautoconf.c" |
| 67 | |
| 68 | /*-------------------------------------------------------------------------*/ |
| 69 | |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 70 | #define DRIVER_DESC "Printer Gadget" |
| 71 | #define DRIVER_VERSION "2007 OCT 06" |
| 72 | |
| 73 | static const char shortname [] = "printer"; |
| 74 | static const char driver_desc [] = DRIVER_DESC; |
| 75 | |
| 76 | static dev_t g_printer_devno; |
| 77 | |
| 78 | static struct class *usb_gadget_class; |
| 79 | |
| 80 | /*-------------------------------------------------------------------------*/ |
| 81 | |
| 82 | struct printer_dev { |
| 83 | spinlock_t lock; /* lock this structure */ |
| 84 | /* lock buffer lists during read/write calls */ |
| 85 | spinlock_t lock_printer_io; |
| 86 | struct usb_gadget *gadget; |
| 87 | struct usb_request *req; /* for control responses */ |
| 88 | u8 config; |
| 89 | s8 interface; |
| 90 | struct usb_ep *in_ep, *out_ep; |
| 91 | const struct usb_endpoint_descriptor |
| 92 | *in, *out; |
| 93 | struct list_head rx_reqs; /* List of free RX structs */ |
| 94 | struct list_head rx_reqs_active; /* List of Active RX xfers */ |
| 95 | struct list_head rx_buffers; /* List of completed xfers */ |
| 96 | /* wait until there is data to be read. */ |
| 97 | wait_queue_head_t rx_wait; |
| 98 | struct list_head tx_reqs; /* List of free TX structs */ |
| 99 | struct list_head tx_reqs_active; /* List of Active TX xfers */ |
| 100 | /* Wait until there are write buffers available to use. */ |
| 101 | wait_queue_head_t tx_wait; |
| 102 | /* Wait until all write buffers have been sent. */ |
| 103 | wait_queue_head_t tx_flush_wait; |
| 104 | struct usb_request *current_rx_req; |
| 105 | size_t current_rx_bytes; |
| 106 | u8 *current_rx_buf; |
| 107 | u8 printer_status; |
| 108 | u8 reset_printer; |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 109 | struct cdev printer_cdev; |
| 110 | struct device *pdev; |
| 111 | u8 printer_cdev_open; |
| 112 | wait_queue_head_t wait; |
| 113 | }; |
| 114 | |
| 115 | static struct printer_dev usb_printer_gadget; |
| 116 | |
| 117 | /*-------------------------------------------------------------------------*/ |
| 118 | |
| 119 | /* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! |
| 120 | * Instead: allocate your own, using normal USB-IF procedures. |
| 121 | */ |
| 122 | |
| 123 | /* Thanks to NetChip Technologies for donating this product ID. |
| 124 | */ |
| 125 | #define PRINTER_VENDOR_NUM 0x0525 /* NetChip */ |
| 126 | #define PRINTER_PRODUCT_NUM 0xa4a8 /* Linux-USB Printer Gadget */ |
| 127 | |
| 128 | /* Some systems will want different product identifers published in the |
| 129 | * device descriptor, either numbers or strings or both. These string |
| 130 | * parameters are in UTF-8 (superset of ASCII's 7 bit characters). |
| 131 | */ |
| 132 | |
| 133 | static ushort __initdata idVendor; |
| 134 | module_param(idVendor, ushort, S_IRUGO); |
| 135 | MODULE_PARM_DESC(idVendor, "USB Vendor ID"); |
| 136 | |
| 137 | static ushort __initdata idProduct; |
| 138 | module_param(idProduct, ushort, S_IRUGO); |
| 139 | MODULE_PARM_DESC(idProduct, "USB Product ID"); |
| 140 | |
| 141 | static ushort __initdata bcdDevice; |
| 142 | module_param(bcdDevice, ushort, S_IRUGO); |
| 143 | MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)"); |
| 144 | |
| 145 | static char *__initdata iManufacturer; |
| 146 | module_param(iManufacturer, charp, S_IRUGO); |
| 147 | MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string"); |
| 148 | |
| 149 | static char *__initdata iProduct; |
| 150 | module_param(iProduct, charp, S_IRUGO); |
| 151 | MODULE_PARM_DESC(iProduct, "USB Product string"); |
| 152 | |
| 153 | static char *__initdata iSerialNum; |
| 154 | module_param(iSerialNum, charp, S_IRUGO); |
| 155 | MODULE_PARM_DESC(iSerialNum, "1"); |
| 156 | |
| 157 | static char *__initdata iPNPstring; |
| 158 | module_param(iPNPstring, charp, S_IRUGO); |
| 159 | MODULE_PARM_DESC(iPNPstring, "MFG:linux;MDL:g_printer;CLS:PRINTER;SN:1;"); |
| 160 | |
| 161 | /* Number of requests to allocate per endpoint, not used for ep0. */ |
| 162 | static unsigned qlen = 10; |
| 163 | module_param(qlen, uint, S_IRUGO|S_IWUSR); |
| 164 | |
| 165 | #define QLEN qlen |
| 166 | |
| 167 | #ifdef CONFIG_USB_GADGET_DUALSPEED |
| 168 | #define DEVSPEED USB_SPEED_HIGH |
| 169 | #else /* full speed (low speed doesn't do bulk) */ |
| 170 | #define DEVSPEED USB_SPEED_FULL |
| 171 | #endif |
| 172 | |
| 173 | /*-------------------------------------------------------------------------*/ |
| 174 | |
| 175 | #define xprintk(d, level, fmt, args...) \ |
| 176 | printk(level "%s: " fmt, DRIVER_DESC, ## args) |
| 177 | |
| 178 | #ifdef DEBUG |
| 179 | #define DBG(dev, fmt, args...) \ |
| 180 | xprintk(dev, KERN_DEBUG, fmt, ## args) |
| 181 | #else |
| 182 | #define DBG(dev, fmt, args...) \ |
| 183 | do { } while (0) |
| 184 | #endif /* DEBUG */ |
| 185 | |
| 186 | #ifdef VERBOSE |
| 187 | #define VDBG(dev, fmt, args...) \ |
| 188 | xprintk(dev, KERN_DEBUG, fmt, ## args) |
| 189 | #else |
| 190 | #define VDBG(dev, fmt, args...) \ |
| 191 | do { } while (0) |
| 192 | #endif /* VERBOSE */ |
| 193 | |
| 194 | #define ERROR(dev, fmt, args...) \ |
| 195 | xprintk(dev, KERN_ERR, fmt, ## args) |
Arjan van de Ven | b6c6393 | 2008-07-25 01:45:52 -0700 | [diff] [blame] | 196 | #define WARNING(dev, fmt, args...) \ |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 197 | xprintk(dev, KERN_WARNING, fmt, ## args) |
| 198 | #define INFO(dev, fmt, args...) \ |
| 199 | xprintk(dev, KERN_INFO, fmt, ## args) |
| 200 | |
| 201 | /*-------------------------------------------------------------------------*/ |
| 202 | |
| 203 | /* USB DRIVER HOOKUP (to the hardware driver, below us), mostly |
| 204 | * ep0 implementation: descriptors, config management, setup(). |
| 205 | * also optional class-specific notification interrupt transfer. |
| 206 | */ |
| 207 | |
| 208 | /* |
| 209 | * DESCRIPTORS ... most are static, but strings and (full) configuration |
| 210 | * descriptors are built on demand. |
| 211 | */ |
| 212 | |
| 213 | #define STRING_MANUFACTURER 1 |
| 214 | #define STRING_PRODUCT 2 |
| 215 | #define STRING_SERIALNUM 3 |
| 216 | |
| 217 | /* holds our biggest descriptor */ |
| 218 | #define USB_DESC_BUFSIZE 256 |
| 219 | #define USB_BUFSIZE 8192 |
| 220 | |
| 221 | /* This device advertises one configuration. */ |
| 222 | #define DEV_CONFIG_VALUE 1 |
| 223 | #define PRINTER_INTERFACE 0 |
| 224 | |
| 225 | static struct usb_device_descriptor device_desc = { |
| 226 | .bLength = sizeof device_desc, |
| 227 | .bDescriptorType = USB_DT_DEVICE, |
| 228 | .bcdUSB = __constant_cpu_to_le16(0x0200), |
| 229 | .bDeviceClass = USB_CLASS_PER_INTERFACE, |
| 230 | .bDeviceSubClass = 0, |
| 231 | .bDeviceProtocol = 0, |
| 232 | .idVendor = __constant_cpu_to_le16(PRINTER_VENDOR_NUM), |
| 233 | .idProduct = __constant_cpu_to_le16(PRINTER_PRODUCT_NUM), |
| 234 | .iManufacturer = STRING_MANUFACTURER, |
| 235 | .iProduct = STRING_PRODUCT, |
| 236 | .iSerialNumber = STRING_SERIALNUM, |
| 237 | .bNumConfigurations = 1 |
| 238 | }; |
| 239 | |
| 240 | static struct usb_otg_descriptor otg_desc = { |
| 241 | .bLength = sizeof otg_desc, |
| 242 | .bDescriptorType = USB_DT_OTG, |
| 243 | .bmAttributes = USB_OTG_SRP |
| 244 | }; |
| 245 | |
| 246 | static struct usb_config_descriptor config_desc = { |
| 247 | .bLength = sizeof config_desc, |
| 248 | .bDescriptorType = USB_DT_CONFIG, |
| 249 | |
| 250 | /* compute wTotalLength on the fly */ |
| 251 | .bNumInterfaces = 1, |
| 252 | .bConfigurationValue = DEV_CONFIG_VALUE, |
| 253 | .iConfiguration = 0, |
| 254 | .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, |
| 255 | .bMaxPower = 1 /* Self-Powered */ |
| 256 | }; |
| 257 | |
| 258 | static struct usb_interface_descriptor intf_desc = { |
| 259 | .bLength = sizeof intf_desc, |
| 260 | .bDescriptorType = USB_DT_INTERFACE, |
| 261 | .bInterfaceNumber = PRINTER_INTERFACE, |
| 262 | .bNumEndpoints = 2, |
| 263 | .bInterfaceClass = USB_CLASS_PRINTER, |
| 264 | .bInterfaceSubClass = 1, /* Printer Sub-Class */ |
| 265 | .bInterfaceProtocol = 2, /* Bi-Directional */ |
| 266 | .iInterface = 0 |
| 267 | }; |
| 268 | |
| 269 | static struct usb_endpoint_descriptor fs_ep_in_desc = { |
| 270 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 271 | .bDescriptorType = USB_DT_ENDPOINT, |
| 272 | .bEndpointAddress = USB_DIR_IN, |
| 273 | .bmAttributes = USB_ENDPOINT_XFER_BULK |
| 274 | }; |
| 275 | |
| 276 | static struct usb_endpoint_descriptor fs_ep_out_desc = { |
| 277 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 278 | .bDescriptorType = USB_DT_ENDPOINT, |
| 279 | .bEndpointAddress = USB_DIR_OUT, |
| 280 | .bmAttributes = USB_ENDPOINT_XFER_BULK |
| 281 | }; |
| 282 | |
| 283 | static const struct usb_descriptor_header *fs_printer_function [11] = { |
| 284 | (struct usb_descriptor_header *) &otg_desc, |
| 285 | (struct usb_descriptor_header *) &intf_desc, |
| 286 | (struct usb_descriptor_header *) &fs_ep_in_desc, |
| 287 | (struct usb_descriptor_header *) &fs_ep_out_desc, |
| 288 | NULL |
| 289 | }; |
| 290 | |
| 291 | #ifdef CONFIG_USB_GADGET_DUALSPEED |
| 292 | |
| 293 | /* |
| 294 | * usb 2.0 devices need to expose both high speed and full speed |
| 295 | * descriptors, unless they only run at full speed. |
| 296 | */ |
| 297 | |
| 298 | static struct usb_endpoint_descriptor hs_ep_in_desc = { |
| 299 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 300 | .bDescriptorType = USB_DT_ENDPOINT, |
| 301 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 302 | .wMaxPacketSize = __constant_cpu_to_le16(512) |
| 303 | }; |
| 304 | |
| 305 | static struct usb_endpoint_descriptor hs_ep_out_desc = { |
| 306 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 307 | .bDescriptorType = USB_DT_ENDPOINT, |
| 308 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 309 | .wMaxPacketSize = __constant_cpu_to_le16(512) |
| 310 | }; |
| 311 | |
| 312 | static struct usb_qualifier_descriptor dev_qualifier = { |
| 313 | .bLength = sizeof dev_qualifier, |
| 314 | .bDescriptorType = USB_DT_DEVICE_QUALIFIER, |
| 315 | .bcdUSB = __constant_cpu_to_le16(0x0200), |
| 316 | .bDeviceClass = USB_CLASS_PRINTER, |
| 317 | .bNumConfigurations = 1 |
| 318 | }; |
| 319 | |
| 320 | static const struct usb_descriptor_header *hs_printer_function [11] = { |
| 321 | (struct usb_descriptor_header *) &otg_desc, |
| 322 | (struct usb_descriptor_header *) &intf_desc, |
| 323 | (struct usb_descriptor_header *) &hs_ep_in_desc, |
| 324 | (struct usb_descriptor_header *) &hs_ep_out_desc, |
| 325 | NULL |
| 326 | }; |
| 327 | |
| 328 | /* maxpacket and other transfer characteristics vary by speed. */ |
| 329 | #define ep_desc(g, hs, fs) (((g)->speed == USB_SPEED_HIGH)?(hs):(fs)) |
| 330 | |
| 331 | #else |
| 332 | |
| 333 | /* if there's no high speed support, maxpacket doesn't change. */ |
| 334 | #define ep_desc(g, hs, fs) (((void)(g)), (fs)) |
| 335 | |
| 336 | #endif /* !CONFIG_USB_GADGET_DUALSPEED */ |
| 337 | |
| 338 | /*-------------------------------------------------------------------------*/ |
| 339 | |
| 340 | /* descriptors that are built on-demand */ |
| 341 | |
| 342 | static char manufacturer [50]; |
| 343 | static char product_desc [40] = DRIVER_DESC; |
| 344 | static char serial_num [40] = "1"; |
| 345 | static char pnp_string [1024] = |
| 346 | "XXMFG:linux;MDL:g_printer;CLS:PRINTER;SN:1;"; |
| 347 | |
| 348 | /* static strings, in UTF-8 */ |
| 349 | static struct usb_string strings [] = { |
| 350 | { STRING_MANUFACTURER, manufacturer, }, |
| 351 | { STRING_PRODUCT, product_desc, }, |
| 352 | { STRING_SERIALNUM, serial_num, }, |
| 353 | { } /* end of list */ |
| 354 | }; |
| 355 | |
| 356 | static struct usb_gadget_strings stringtab = { |
| 357 | .language = 0x0409, /* en-us */ |
| 358 | .strings = strings, |
| 359 | }; |
| 360 | |
| 361 | /*-------------------------------------------------------------------------*/ |
| 362 | |
| 363 | static struct usb_request * |
| 364 | printer_req_alloc(struct usb_ep *ep, unsigned len, gfp_t gfp_flags) |
| 365 | { |
| 366 | struct usb_request *req; |
| 367 | |
| 368 | req = usb_ep_alloc_request(ep, gfp_flags); |
| 369 | |
| 370 | if (req != NULL) { |
| 371 | req->length = len; |
| 372 | req->buf = kmalloc(len, gfp_flags); |
| 373 | if (req->buf == NULL) { |
| 374 | usb_ep_free_request(ep, req); |
| 375 | return NULL; |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | return req; |
| 380 | } |
| 381 | |
| 382 | static void |
| 383 | printer_req_free(struct usb_ep *ep, struct usb_request *req) |
| 384 | { |
| 385 | if (ep != NULL && req != NULL) { |
| 386 | kfree(req->buf); |
| 387 | usb_ep_free_request(ep, req); |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | /*-------------------------------------------------------------------------*/ |
| 392 | |
| 393 | static void rx_complete(struct usb_ep *ep, struct usb_request *req) |
| 394 | { |
| 395 | struct printer_dev *dev = ep->driver_data; |
| 396 | int status = req->status; |
| 397 | unsigned long flags; |
| 398 | |
| 399 | spin_lock_irqsave(&dev->lock, flags); |
| 400 | |
| 401 | list_del_init(&req->list); /* Remode from Active List */ |
| 402 | |
| 403 | switch (status) { |
| 404 | |
| 405 | /* normal completion */ |
| 406 | case 0: |
Craig W. Nadler | cc901bb | 2008-03-20 14:46:26 -0700 | [diff] [blame] | 407 | if (req->actual > 0) { |
| 408 | list_add_tail(&req->list, &dev->rx_buffers); |
| 409 | DBG(dev, "G_Printer : rx length %d\n", req->actual); |
| 410 | } else { |
| 411 | list_add(&req->list, &dev->rx_reqs); |
| 412 | } |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 413 | break; |
| 414 | |
| 415 | /* software-driven interface shutdown */ |
| 416 | case -ECONNRESET: /* unlink */ |
| 417 | case -ESHUTDOWN: /* disconnect etc */ |
| 418 | VDBG(dev, "rx shutdown, code %d\n", status); |
| 419 | list_add(&req->list, &dev->rx_reqs); |
| 420 | break; |
| 421 | |
| 422 | /* for hardware automagic (such as pxa) */ |
| 423 | case -ECONNABORTED: /* endpoint reset */ |
| 424 | DBG(dev, "rx %s reset\n", ep->name); |
| 425 | list_add(&req->list, &dev->rx_reqs); |
| 426 | break; |
| 427 | |
| 428 | /* data overrun */ |
| 429 | case -EOVERFLOW: |
| 430 | /* FALLTHROUGH */ |
| 431 | |
| 432 | default: |
| 433 | DBG(dev, "rx status %d\n", status); |
| 434 | list_add(&req->list, &dev->rx_reqs); |
| 435 | break; |
| 436 | } |
Craig W. Nadler | cc901bb | 2008-03-20 14:46:26 -0700 | [diff] [blame] | 437 | |
| 438 | wake_up_interruptible(&dev->rx_wait); |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 439 | spin_unlock_irqrestore(&dev->lock, flags); |
| 440 | } |
| 441 | |
| 442 | static void tx_complete(struct usb_ep *ep, struct usb_request *req) |
| 443 | { |
| 444 | struct printer_dev *dev = ep->driver_data; |
| 445 | |
| 446 | switch (req->status) { |
| 447 | default: |
| 448 | VDBG(dev, "tx err %d\n", req->status); |
| 449 | /* FALLTHROUGH */ |
| 450 | case -ECONNRESET: /* unlink */ |
| 451 | case -ESHUTDOWN: /* disconnect etc */ |
| 452 | break; |
| 453 | case 0: |
| 454 | break; |
| 455 | } |
| 456 | |
| 457 | spin_lock(&dev->lock); |
| 458 | /* Take the request struct off the active list and put it on the |
| 459 | * free list. |
| 460 | */ |
| 461 | list_del_init(&req->list); |
| 462 | list_add(&req->list, &dev->tx_reqs); |
| 463 | wake_up_interruptible(&dev->tx_wait); |
| 464 | if (likely(list_empty(&dev->tx_reqs_active))) |
| 465 | wake_up_interruptible(&dev->tx_flush_wait); |
| 466 | |
| 467 | spin_unlock(&dev->lock); |
| 468 | } |
| 469 | |
| 470 | /*-------------------------------------------------------------------------*/ |
| 471 | |
| 472 | static int |
| 473 | printer_open(struct inode *inode, struct file *fd) |
| 474 | { |
| 475 | struct printer_dev *dev; |
| 476 | unsigned long flags; |
| 477 | int ret = -EBUSY; |
| 478 | |
Jonathan Corbet | b2f2ba0 | 2008-05-16 14:21:30 -0600 | [diff] [blame] | 479 | lock_kernel(); |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 480 | dev = container_of(inode->i_cdev, struct printer_dev, printer_cdev); |
| 481 | |
| 482 | spin_lock_irqsave(&dev->lock, flags); |
| 483 | |
| 484 | if (!dev->printer_cdev_open) { |
| 485 | dev->printer_cdev_open = 1; |
| 486 | fd->private_data = dev; |
| 487 | ret = 0; |
| 488 | /* Change the printer status to show that it's on-line. */ |
| 489 | dev->printer_status |= PRINTER_SELECTED; |
| 490 | } |
| 491 | |
| 492 | spin_unlock_irqrestore(&dev->lock, flags); |
| 493 | |
| 494 | DBG(dev, "printer_open returned %x\n", ret); |
Jonathan Corbet | b2f2ba0 | 2008-05-16 14:21:30 -0600 | [diff] [blame] | 495 | unlock_kernel(); |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 496 | return ret; |
| 497 | } |
| 498 | |
| 499 | static int |
| 500 | printer_close(struct inode *inode, struct file *fd) |
| 501 | { |
| 502 | struct printer_dev *dev = fd->private_data; |
| 503 | unsigned long flags; |
| 504 | |
| 505 | spin_lock_irqsave(&dev->lock, flags); |
| 506 | dev->printer_cdev_open = 0; |
| 507 | fd->private_data = NULL; |
| 508 | /* Change printer status to show that the printer is off-line. */ |
| 509 | dev->printer_status &= ~PRINTER_SELECTED; |
| 510 | spin_unlock_irqrestore(&dev->lock, flags); |
| 511 | |
| 512 | DBG(dev, "printer_close\n"); |
| 513 | |
| 514 | return 0; |
| 515 | } |
| 516 | |
Craig W. Nadler | cc901bb | 2008-03-20 14:46:26 -0700 | [diff] [blame] | 517 | /* This function must be called with interrupts turned off. */ |
| 518 | static void |
| 519 | setup_rx_reqs(struct printer_dev *dev) |
| 520 | { |
| 521 | struct usb_request *req; |
| 522 | |
| 523 | while (likely(!list_empty(&dev->rx_reqs))) { |
| 524 | int error; |
| 525 | |
| 526 | req = container_of(dev->rx_reqs.next, |
| 527 | struct usb_request, list); |
| 528 | list_del_init(&req->list); |
| 529 | |
| 530 | /* The USB Host sends us whatever amount of data it wants to |
| 531 | * so we always set the length field to the full USB_BUFSIZE. |
| 532 | * If the amount of data is more than the read() caller asked |
| 533 | * for it will be stored in the request buffer until it is |
| 534 | * asked for by read(). |
| 535 | */ |
| 536 | req->length = USB_BUFSIZE; |
| 537 | req->complete = rx_complete; |
| 538 | |
| 539 | error = usb_ep_queue(dev->out_ep, req, GFP_ATOMIC); |
| 540 | if (error) { |
| 541 | DBG(dev, "rx submit --> %d\n", error); |
| 542 | list_add(&req->list, &dev->rx_reqs); |
| 543 | break; |
| 544 | } else { |
| 545 | list_add(&req->list, &dev->rx_reqs_active); |
| 546 | } |
| 547 | } |
| 548 | } |
| 549 | |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 550 | static ssize_t |
| 551 | printer_read(struct file *fd, char __user *buf, size_t len, loff_t *ptr) |
| 552 | { |
| 553 | struct printer_dev *dev = fd->private_data; |
| 554 | unsigned long flags; |
| 555 | size_t size; |
| 556 | size_t bytes_copied; |
| 557 | struct usb_request *req; |
| 558 | /* This is a pointer to the current USB rx request. */ |
| 559 | struct usb_request *current_rx_req; |
| 560 | /* This is the number of bytes in the current rx buffer. */ |
| 561 | size_t current_rx_bytes; |
| 562 | /* This is a pointer to the current rx buffer. */ |
| 563 | u8 *current_rx_buf; |
| 564 | |
| 565 | if (len == 0) |
| 566 | return -EINVAL; |
| 567 | |
| 568 | DBG(dev, "printer_read trying to read %d bytes\n", (int)len); |
| 569 | |
| 570 | spin_lock(&dev->lock_printer_io); |
| 571 | spin_lock_irqsave(&dev->lock, flags); |
| 572 | |
| 573 | /* We will use this flag later to check if a printer reset happened |
| 574 | * after we turn interrupts back on. |
| 575 | */ |
| 576 | dev->reset_printer = 0; |
| 577 | |
Craig W. Nadler | cc901bb | 2008-03-20 14:46:26 -0700 | [diff] [blame] | 578 | setup_rx_reqs(dev); |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 579 | |
| 580 | bytes_copied = 0; |
| 581 | current_rx_req = dev->current_rx_req; |
| 582 | current_rx_bytes = dev->current_rx_bytes; |
| 583 | current_rx_buf = dev->current_rx_buf; |
| 584 | dev->current_rx_req = NULL; |
| 585 | dev->current_rx_bytes = 0; |
| 586 | dev->current_rx_buf = NULL; |
| 587 | |
| 588 | /* Check if there is any data in the read buffers. Please note that |
| 589 | * current_rx_bytes is the number of bytes in the current rx buffer. |
| 590 | * If it is zero then check if there are any other rx_buffers that |
| 591 | * are on the completed list. We are only out of data if all rx |
| 592 | * buffers are empty. |
| 593 | */ |
| 594 | if ((current_rx_bytes == 0) && |
| 595 | (likely(list_empty(&dev->rx_buffers)))) { |
| 596 | /* Turn interrupts back on before sleeping. */ |
| 597 | spin_unlock_irqrestore(&dev->lock, flags); |
| 598 | |
| 599 | /* |
| 600 | * If no data is available check if this is a NON-Blocking |
| 601 | * call or not. |
| 602 | */ |
| 603 | if (fd->f_flags & (O_NONBLOCK|O_NDELAY)) { |
| 604 | spin_unlock(&dev->lock_printer_io); |
| 605 | return -EAGAIN; |
| 606 | } |
| 607 | |
| 608 | /* Sleep until data is available */ |
| 609 | wait_event_interruptible(dev->rx_wait, |
| 610 | (likely(!list_empty(&dev->rx_buffers)))); |
| 611 | spin_lock_irqsave(&dev->lock, flags); |
| 612 | } |
| 613 | |
| 614 | /* We have data to return then copy it to the caller's buffer.*/ |
| 615 | while ((current_rx_bytes || likely(!list_empty(&dev->rx_buffers))) |
| 616 | && len) { |
| 617 | if (current_rx_bytes == 0) { |
| 618 | req = container_of(dev->rx_buffers.next, |
| 619 | struct usb_request, list); |
| 620 | list_del_init(&req->list); |
| 621 | |
| 622 | if (req->actual && req->buf) { |
| 623 | current_rx_req = req; |
| 624 | current_rx_bytes = req->actual; |
| 625 | current_rx_buf = req->buf; |
| 626 | } else { |
| 627 | list_add(&req->list, &dev->rx_reqs); |
| 628 | continue; |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | /* Don't leave irqs off while doing memory copies */ |
| 633 | spin_unlock_irqrestore(&dev->lock, flags); |
| 634 | |
| 635 | if (len > current_rx_bytes) |
| 636 | size = current_rx_bytes; |
| 637 | else |
| 638 | size = len; |
| 639 | |
| 640 | size -= copy_to_user(buf, current_rx_buf, size); |
| 641 | bytes_copied += size; |
| 642 | len -= size; |
| 643 | buf += size; |
| 644 | |
| 645 | spin_lock_irqsave(&dev->lock, flags); |
| 646 | |
Craig W. Nadler | cc901bb | 2008-03-20 14:46:26 -0700 | [diff] [blame] | 647 | /* We've disconnected or reset so return. */ |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 648 | if (dev->reset_printer) { |
Craig W. Nadler | cc901bb | 2008-03-20 14:46:26 -0700 | [diff] [blame] | 649 | list_add(¤t_rx_req->list, &dev->rx_reqs); |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 650 | spin_unlock_irqrestore(&dev->lock, flags); |
| 651 | spin_unlock(&dev->lock_printer_io); |
| 652 | return -EAGAIN; |
| 653 | } |
| 654 | |
| 655 | /* If we not returning all the data left in this RX request |
| 656 | * buffer then adjust the amount of data left in the buffer. |
| 657 | * Othewise if we are done with this RX request buffer then |
| 658 | * requeue it to get any incoming data from the USB host. |
| 659 | */ |
| 660 | if (size < current_rx_bytes) { |
| 661 | current_rx_bytes -= size; |
| 662 | current_rx_buf += size; |
| 663 | } else { |
| 664 | list_add(¤t_rx_req->list, &dev->rx_reqs); |
| 665 | current_rx_bytes = 0; |
| 666 | current_rx_buf = NULL; |
| 667 | current_rx_req = NULL; |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | dev->current_rx_req = current_rx_req; |
| 672 | dev->current_rx_bytes = current_rx_bytes; |
| 673 | dev->current_rx_buf = current_rx_buf; |
| 674 | |
| 675 | spin_unlock_irqrestore(&dev->lock, flags); |
| 676 | spin_unlock(&dev->lock_printer_io); |
| 677 | |
| 678 | DBG(dev, "printer_read returned %d bytes\n", (int)bytes_copied); |
| 679 | |
| 680 | if (bytes_copied) |
| 681 | return bytes_copied; |
| 682 | else |
| 683 | return -EAGAIN; |
| 684 | } |
| 685 | |
| 686 | static ssize_t |
| 687 | printer_write(struct file *fd, const char __user *buf, size_t len, loff_t *ptr) |
| 688 | { |
| 689 | struct printer_dev *dev = fd->private_data; |
| 690 | unsigned long flags; |
| 691 | size_t size; /* Amount of data in a TX request. */ |
| 692 | size_t bytes_copied = 0; |
| 693 | struct usb_request *req; |
| 694 | |
| 695 | DBG(dev, "printer_write trying to send %d bytes\n", (int)len); |
| 696 | |
| 697 | if (len == 0) |
| 698 | return -EINVAL; |
| 699 | |
| 700 | spin_lock(&dev->lock_printer_io); |
| 701 | spin_lock_irqsave(&dev->lock, flags); |
| 702 | |
| 703 | /* Check if a printer reset happens while we have interrupts on */ |
| 704 | dev->reset_printer = 0; |
| 705 | |
| 706 | /* Check if there is any available write buffers */ |
| 707 | if (likely(list_empty(&dev->tx_reqs))) { |
| 708 | /* Turn interrupts back on before sleeping. */ |
| 709 | spin_unlock_irqrestore(&dev->lock, flags); |
| 710 | |
| 711 | /* |
| 712 | * If write buffers are available check if this is |
| 713 | * a NON-Blocking call or not. |
| 714 | */ |
| 715 | if (fd->f_flags & (O_NONBLOCK|O_NDELAY)) { |
| 716 | spin_unlock(&dev->lock_printer_io); |
| 717 | return -EAGAIN; |
| 718 | } |
| 719 | |
| 720 | /* Sleep until a write buffer is available */ |
| 721 | wait_event_interruptible(dev->tx_wait, |
| 722 | (likely(!list_empty(&dev->tx_reqs)))); |
| 723 | spin_lock_irqsave(&dev->lock, flags); |
| 724 | } |
| 725 | |
| 726 | while (likely(!list_empty(&dev->tx_reqs)) && len) { |
| 727 | |
| 728 | if (len > USB_BUFSIZE) |
| 729 | size = USB_BUFSIZE; |
| 730 | else |
| 731 | size = len; |
| 732 | |
| 733 | req = container_of(dev->tx_reqs.next, struct usb_request, |
| 734 | list); |
| 735 | list_del_init(&req->list); |
| 736 | |
| 737 | req->complete = tx_complete; |
| 738 | req->length = size; |
| 739 | |
| 740 | /* Check if we need to send a zero length packet. */ |
| 741 | if (len > size) |
| 742 | /* They will be more TX requests so no yet. */ |
| 743 | req->zero = 0; |
| 744 | else |
| 745 | /* If the data amount is not a multple of the |
| 746 | * maxpacket size then send a zero length packet. |
| 747 | */ |
| 748 | req->zero = ((len % dev->in_ep->maxpacket) == 0); |
| 749 | |
| 750 | /* Don't leave irqs off while doing memory copies */ |
| 751 | spin_unlock_irqrestore(&dev->lock, flags); |
| 752 | |
| 753 | if (copy_from_user(req->buf, buf, size)) { |
| 754 | list_add(&req->list, &dev->tx_reqs); |
| 755 | spin_unlock(&dev->lock_printer_io); |
| 756 | return bytes_copied; |
| 757 | } |
| 758 | |
| 759 | bytes_copied += size; |
| 760 | len -= size; |
| 761 | buf += size; |
| 762 | |
| 763 | spin_lock_irqsave(&dev->lock, flags); |
| 764 | |
| 765 | /* We've disconnected or reset so free the req and buffer */ |
| 766 | if (dev->reset_printer) { |
Craig W. Nadler | cc901bb | 2008-03-20 14:46:26 -0700 | [diff] [blame] | 767 | list_add(&req->list, &dev->tx_reqs); |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 768 | spin_unlock_irqrestore(&dev->lock, flags); |
| 769 | spin_unlock(&dev->lock_printer_io); |
| 770 | return -EAGAIN; |
| 771 | } |
| 772 | |
| 773 | if (usb_ep_queue(dev->in_ep, req, GFP_ATOMIC)) { |
| 774 | list_add(&req->list, &dev->tx_reqs); |
| 775 | spin_unlock_irqrestore(&dev->lock, flags); |
| 776 | spin_unlock(&dev->lock_printer_io); |
| 777 | return -EAGAIN; |
| 778 | } |
| 779 | |
| 780 | list_add(&req->list, &dev->tx_reqs_active); |
| 781 | |
| 782 | } |
| 783 | |
| 784 | spin_unlock_irqrestore(&dev->lock, flags); |
| 785 | spin_unlock(&dev->lock_printer_io); |
| 786 | |
| 787 | DBG(dev, "printer_write sent %d bytes\n", (int)bytes_copied); |
| 788 | |
| 789 | if (bytes_copied) { |
| 790 | return bytes_copied; |
| 791 | } else { |
| 792 | return -EAGAIN; |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | static int |
| 797 | printer_fsync(struct file *fd, struct dentry *dentry, int datasync) |
| 798 | { |
| 799 | struct printer_dev *dev = fd->private_data; |
| 800 | unsigned long flags; |
| 801 | int tx_list_empty; |
| 802 | |
| 803 | spin_lock_irqsave(&dev->lock, flags); |
| 804 | tx_list_empty = (likely(list_empty(&dev->tx_reqs))); |
| 805 | spin_unlock_irqrestore(&dev->lock, flags); |
| 806 | |
| 807 | if (!tx_list_empty) { |
| 808 | /* Sleep until all data has been sent */ |
| 809 | wait_event_interruptible(dev->tx_flush_wait, |
| 810 | (likely(list_empty(&dev->tx_reqs_active)))); |
| 811 | } |
| 812 | |
| 813 | return 0; |
| 814 | } |
| 815 | |
| 816 | static unsigned int |
| 817 | printer_poll(struct file *fd, poll_table *wait) |
| 818 | { |
| 819 | struct printer_dev *dev = fd->private_data; |
| 820 | unsigned long flags; |
| 821 | int status = 0; |
| 822 | |
Craig W. Nadler | cc901bb | 2008-03-20 14:46:26 -0700 | [diff] [blame] | 823 | spin_lock(&dev->lock_printer_io); |
| 824 | spin_lock_irqsave(&dev->lock, flags); |
| 825 | setup_rx_reqs(dev); |
| 826 | spin_unlock_irqrestore(&dev->lock, flags); |
| 827 | spin_unlock(&dev->lock_printer_io); |
| 828 | |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 829 | poll_wait(fd, &dev->rx_wait, wait); |
| 830 | poll_wait(fd, &dev->tx_wait, wait); |
| 831 | |
| 832 | spin_lock_irqsave(&dev->lock, flags); |
| 833 | if (likely(!list_empty(&dev->tx_reqs))) |
| 834 | status |= POLLOUT | POLLWRNORM; |
| 835 | |
Craig W. Nadler | cc901bb | 2008-03-20 14:46:26 -0700 | [diff] [blame] | 836 | if (likely(dev->current_rx_bytes) || |
| 837 | likely(!list_empty(&dev->rx_buffers))) |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 838 | status |= POLLIN | POLLRDNORM; |
| 839 | |
| 840 | spin_unlock_irqrestore(&dev->lock, flags); |
| 841 | |
| 842 | return status; |
| 843 | } |
| 844 | |
Alan Cox | 44c389a | 2008-05-22 22:03:27 +0100 | [diff] [blame] | 845 | static long |
| 846 | printer_ioctl(struct file *fd, unsigned int code, unsigned long arg) |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 847 | { |
| 848 | struct printer_dev *dev = fd->private_data; |
| 849 | unsigned long flags; |
| 850 | int status = 0; |
| 851 | |
| 852 | DBG(dev, "printer_ioctl: cmd=0x%4.4x, arg=%lu\n", code, arg); |
| 853 | |
| 854 | /* handle ioctls */ |
| 855 | |
| 856 | spin_lock_irqsave(&dev->lock, flags); |
| 857 | |
| 858 | switch (code) { |
| 859 | case GADGET_GET_PRINTER_STATUS: |
| 860 | status = (int)dev->printer_status; |
| 861 | break; |
| 862 | case GADGET_SET_PRINTER_STATUS: |
| 863 | dev->printer_status = (u8)arg; |
| 864 | break; |
| 865 | default: |
| 866 | /* could not handle ioctl */ |
| 867 | DBG(dev, "printer_ioctl: ERROR cmd=0x%4.4xis not supported\n", |
| 868 | code); |
| 869 | status = -ENOTTY; |
| 870 | } |
| 871 | |
| 872 | spin_unlock_irqrestore(&dev->lock, flags); |
| 873 | |
| 874 | return status; |
| 875 | } |
| 876 | |
| 877 | /* used after endpoint configuration */ |
| 878 | static struct file_operations printer_io_operations = { |
| 879 | .owner = THIS_MODULE, |
| 880 | .open = printer_open, |
| 881 | .read = printer_read, |
| 882 | .write = printer_write, |
| 883 | .fsync = printer_fsync, |
| 884 | .poll = printer_poll, |
Alan Cox | 44c389a | 2008-05-22 22:03:27 +0100 | [diff] [blame] | 885 | .unlocked_ioctl = printer_ioctl, |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 886 | .release = printer_close |
| 887 | }; |
| 888 | |
| 889 | /*-------------------------------------------------------------------------*/ |
| 890 | |
| 891 | static int |
| 892 | set_printer_interface(struct printer_dev *dev) |
| 893 | { |
| 894 | int result = 0; |
| 895 | |
| 896 | dev->in = ep_desc(dev->gadget, &hs_ep_in_desc, &fs_ep_in_desc); |
| 897 | dev->in_ep->driver_data = dev; |
| 898 | |
| 899 | dev->out = ep_desc(dev->gadget, &hs_ep_out_desc, &fs_ep_out_desc); |
| 900 | dev->out_ep->driver_data = dev; |
| 901 | |
| 902 | result = usb_ep_enable(dev->in_ep, dev->in); |
| 903 | if (result != 0) { |
| 904 | DBG(dev, "enable %s --> %d\n", dev->in_ep->name, result); |
| 905 | goto done; |
| 906 | } |
| 907 | |
| 908 | result = usb_ep_enable(dev->out_ep, dev->out); |
| 909 | if (result != 0) { |
| 910 | DBG(dev, "enable %s --> %d\n", dev->in_ep->name, result); |
| 911 | goto done; |
| 912 | } |
| 913 | |
| 914 | done: |
| 915 | /* on error, disable any endpoints */ |
| 916 | if (result != 0) { |
| 917 | (void) usb_ep_disable(dev->in_ep); |
| 918 | (void) usb_ep_disable(dev->out_ep); |
| 919 | dev->in = NULL; |
| 920 | dev->out = NULL; |
| 921 | } |
| 922 | |
| 923 | /* caller is responsible for cleanup on error */ |
| 924 | return result; |
| 925 | } |
| 926 | |
| 927 | static void printer_reset_interface(struct printer_dev *dev) |
| 928 | { |
| 929 | if (dev->interface < 0) |
| 930 | return; |
| 931 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 932 | DBG(dev, "%s\n", __func__); |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 933 | |
| 934 | if (dev->in) |
| 935 | usb_ep_disable(dev->in_ep); |
| 936 | |
| 937 | if (dev->out) |
| 938 | usb_ep_disable(dev->out_ep); |
| 939 | |
| 940 | dev->interface = -1; |
| 941 | } |
| 942 | |
| 943 | /* change our operational config. must agree with the code |
| 944 | * that returns config descriptors, and altsetting code. |
| 945 | */ |
| 946 | static int |
| 947 | printer_set_config(struct printer_dev *dev, unsigned number) |
| 948 | { |
| 949 | int result = 0; |
| 950 | struct usb_gadget *gadget = dev->gadget; |
| 951 | |
| 952 | if (gadget_is_sa1100(gadget) && dev->config) { |
| 953 | /* tx fifo is full, but we can't clear it...*/ |
| 954 | INFO(dev, "can't change configurations\n"); |
| 955 | return -ESPIPE; |
| 956 | } |
| 957 | |
| 958 | switch (number) { |
| 959 | case DEV_CONFIG_VALUE: |
| 960 | result = 0; |
| 961 | break; |
| 962 | default: |
| 963 | result = -EINVAL; |
| 964 | /* FALL THROUGH */ |
| 965 | case 0: |
| 966 | break; |
| 967 | } |
| 968 | |
| 969 | if (result) { |
| 970 | usb_gadget_vbus_draw(dev->gadget, |
| 971 | dev->gadget->is_otg ? 8 : 100); |
| 972 | } else { |
| 973 | char *speed; |
| 974 | unsigned power; |
| 975 | |
| 976 | power = 2 * config_desc.bMaxPower; |
| 977 | usb_gadget_vbus_draw(dev->gadget, power); |
| 978 | |
| 979 | switch (gadget->speed) { |
| 980 | case USB_SPEED_FULL: speed = "full"; break; |
| 981 | #ifdef CONFIG_USB_GADGET_DUALSPEED |
| 982 | case USB_SPEED_HIGH: speed = "high"; break; |
| 983 | #endif |
| 984 | default: speed = "?"; break; |
| 985 | } |
| 986 | |
| 987 | dev->config = number; |
| 988 | INFO(dev, "%s speed config #%d: %d mA, %s\n", |
| 989 | speed, number, power, driver_desc); |
| 990 | } |
| 991 | return result; |
| 992 | } |
| 993 | |
| 994 | static int |
| 995 | config_buf(enum usb_device_speed speed, u8 *buf, u8 type, unsigned index, |
| 996 | int is_otg) |
| 997 | { |
| 998 | int len; |
| 999 | const struct usb_descriptor_header **function; |
| 1000 | #ifdef CONFIG_USB_GADGET_DUALSPEED |
| 1001 | int hs = (speed == USB_SPEED_HIGH); |
| 1002 | |
| 1003 | if (type == USB_DT_OTHER_SPEED_CONFIG) |
| 1004 | hs = !hs; |
| 1005 | |
| 1006 | if (hs) { |
| 1007 | function = hs_printer_function; |
| 1008 | } else { |
| 1009 | function = fs_printer_function; |
| 1010 | } |
| 1011 | #else |
| 1012 | function = fs_printer_function; |
| 1013 | #endif |
| 1014 | |
| 1015 | if (index >= device_desc.bNumConfigurations) |
| 1016 | return -EINVAL; |
| 1017 | |
| 1018 | /* for now, don't advertise srp-only devices */ |
| 1019 | if (!is_otg) |
| 1020 | function++; |
| 1021 | |
| 1022 | len = usb_gadget_config_buf(&config_desc, buf, USB_DESC_BUFSIZE, |
| 1023 | function); |
| 1024 | if (len < 0) |
| 1025 | return len; |
| 1026 | ((struct usb_config_descriptor *) buf)->bDescriptorType = type; |
| 1027 | return len; |
| 1028 | } |
| 1029 | |
| 1030 | /* Change our operational Interface. */ |
| 1031 | static int |
| 1032 | set_interface(struct printer_dev *dev, unsigned number) |
| 1033 | { |
| 1034 | int result = 0; |
| 1035 | |
| 1036 | if (gadget_is_sa1100(dev->gadget) && dev->interface < 0) { |
| 1037 | /* tx fifo is full, but we can't clear it...*/ |
| 1038 | INFO(dev, "can't change interfaces\n"); |
| 1039 | return -ESPIPE; |
| 1040 | } |
| 1041 | |
| 1042 | /* Free the current interface */ |
| 1043 | switch (dev->interface) { |
| 1044 | case PRINTER_INTERFACE: |
| 1045 | printer_reset_interface(dev); |
| 1046 | break; |
| 1047 | } |
| 1048 | |
| 1049 | switch (number) { |
| 1050 | case PRINTER_INTERFACE: |
| 1051 | result = set_printer_interface(dev); |
| 1052 | if (result) { |
| 1053 | printer_reset_interface(dev); |
| 1054 | } else { |
| 1055 | dev->interface = PRINTER_INTERFACE; |
| 1056 | } |
| 1057 | break; |
| 1058 | default: |
| 1059 | result = -EINVAL; |
| 1060 | /* FALL THROUGH */ |
| 1061 | } |
| 1062 | |
| 1063 | if (!result) |
| 1064 | INFO(dev, "Using interface %x\n", number); |
| 1065 | |
| 1066 | return result; |
| 1067 | } |
| 1068 | |
| 1069 | static void printer_setup_complete(struct usb_ep *ep, struct usb_request *req) |
| 1070 | { |
| 1071 | if (req->status || req->actual != req->length) |
| 1072 | DBG((struct printer_dev *) ep->driver_data, |
| 1073 | "setup complete --> %d, %d/%d\n", |
| 1074 | req->status, req->actual, req->length); |
| 1075 | } |
| 1076 | |
| 1077 | static void printer_soft_reset(struct printer_dev *dev) |
| 1078 | { |
| 1079 | struct usb_request *req; |
| 1080 | |
| 1081 | INFO(dev, "Received Printer Reset Request\n"); |
| 1082 | |
| 1083 | if (usb_ep_disable(dev->in_ep)) |
| 1084 | DBG(dev, "Failed to disable USB in_ep\n"); |
| 1085 | if (usb_ep_disable(dev->out_ep)) |
| 1086 | DBG(dev, "Failed to disable USB out_ep\n"); |
| 1087 | |
| 1088 | if (dev->current_rx_req != NULL) { |
| 1089 | list_add(&dev->current_rx_req->list, &dev->rx_reqs); |
| 1090 | dev->current_rx_req = NULL; |
| 1091 | } |
| 1092 | dev->current_rx_bytes = 0; |
| 1093 | dev->current_rx_buf = NULL; |
| 1094 | dev->reset_printer = 1; |
| 1095 | |
| 1096 | while (likely(!(list_empty(&dev->rx_buffers)))) { |
| 1097 | req = container_of(dev->rx_buffers.next, struct usb_request, |
| 1098 | list); |
| 1099 | list_del_init(&req->list); |
| 1100 | list_add(&req->list, &dev->rx_reqs); |
| 1101 | } |
| 1102 | |
| 1103 | while (likely(!(list_empty(&dev->rx_reqs_active)))) { |
| 1104 | req = container_of(dev->rx_buffers.next, struct usb_request, |
| 1105 | list); |
| 1106 | list_del_init(&req->list); |
| 1107 | list_add(&req->list, &dev->rx_reqs); |
| 1108 | } |
| 1109 | |
| 1110 | while (likely(!(list_empty(&dev->tx_reqs_active)))) { |
| 1111 | req = container_of(dev->tx_reqs_active.next, |
| 1112 | struct usb_request, list); |
| 1113 | list_del_init(&req->list); |
| 1114 | list_add(&req->list, &dev->tx_reqs); |
| 1115 | } |
| 1116 | |
| 1117 | if (usb_ep_enable(dev->in_ep, dev->in)) |
| 1118 | DBG(dev, "Failed to enable USB in_ep\n"); |
| 1119 | if (usb_ep_enable(dev->out_ep, dev->out)) |
| 1120 | DBG(dev, "Failed to enable USB out_ep\n"); |
| 1121 | |
Craig W. Nadler | cc901bb | 2008-03-20 14:46:26 -0700 | [diff] [blame] | 1122 | wake_up_interruptible(&dev->rx_wait); |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 1123 | wake_up_interruptible(&dev->tx_wait); |
| 1124 | wake_up_interruptible(&dev->tx_flush_wait); |
| 1125 | } |
| 1126 | |
| 1127 | /*-------------------------------------------------------------------------*/ |
| 1128 | |
| 1129 | /* |
| 1130 | * The setup() callback implements all the ep0 functionality that's not |
| 1131 | * handled lower down. |
| 1132 | */ |
| 1133 | static int |
| 1134 | printer_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) |
| 1135 | { |
| 1136 | struct printer_dev *dev = get_gadget_data(gadget); |
| 1137 | struct usb_request *req = dev->req; |
| 1138 | int value = -EOPNOTSUPP; |
| 1139 | u16 wIndex = le16_to_cpu(ctrl->wIndex); |
| 1140 | u16 wValue = le16_to_cpu(ctrl->wValue); |
| 1141 | u16 wLength = le16_to_cpu(ctrl->wLength); |
| 1142 | |
| 1143 | DBG(dev, "ctrl req%02x.%02x v%04x i%04x l%d\n", |
| 1144 | ctrl->bRequestType, ctrl->bRequest, wValue, wIndex, wLength); |
| 1145 | |
| 1146 | req->complete = printer_setup_complete; |
| 1147 | |
| 1148 | switch (ctrl->bRequestType&USB_TYPE_MASK) { |
| 1149 | |
| 1150 | case USB_TYPE_STANDARD: |
| 1151 | switch (ctrl->bRequest) { |
| 1152 | |
| 1153 | case USB_REQ_GET_DESCRIPTOR: |
| 1154 | if (ctrl->bRequestType != USB_DIR_IN) |
| 1155 | break; |
| 1156 | switch (wValue >> 8) { |
| 1157 | |
| 1158 | case USB_DT_DEVICE: |
| 1159 | value = min(wLength, (u16) sizeof device_desc); |
| 1160 | memcpy(req->buf, &device_desc, value); |
| 1161 | break; |
| 1162 | #ifdef CONFIG_USB_GADGET_DUALSPEED |
| 1163 | case USB_DT_DEVICE_QUALIFIER: |
| 1164 | if (!gadget->is_dualspeed) |
| 1165 | break; |
| 1166 | value = min(wLength, |
| 1167 | (u16) sizeof dev_qualifier); |
| 1168 | memcpy(req->buf, &dev_qualifier, value); |
| 1169 | break; |
| 1170 | |
| 1171 | case USB_DT_OTHER_SPEED_CONFIG: |
| 1172 | if (!gadget->is_dualspeed) |
| 1173 | break; |
| 1174 | /* FALLTHROUGH */ |
| 1175 | #endif /* CONFIG_USB_GADGET_DUALSPEED */ |
| 1176 | case USB_DT_CONFIG: |
| 1177 | value = config_buf(gadget->speed, req->buf, |
| 1178 | wValue >> 8, |
| 1179 | wValue & 0xff, |
| 1180 | gadget->is_otg); |
| 1181 | if (value >= 0) |
| 1182 | value = min(wLength, (u16) value); |
| 1183 | break; |
| 1184 | |
| 1185 | case USB_DT_STRING: |
| 1186 | value = usb_gadget_get_string(&stringtab, |
| 1187 | wValue & 0xff, req->buf); |
| 1188 | if (value >= 0) |
| 1189 | value = min(wLength, (u16) value); |
| 1190 | break; |
| 1191 | } |
| 1192 | break; |
| 1193 | |
| 1194 | case USB_REQ_SET_CONFIGURATION: |
| 1195 | if (ctrl->bRequestType != 0) |
| 1196 | break; |
| 1197 | if (gadget->a_hnp_support) |
| 1198 | DBG(dev, "HNP available\n"); |
| 1199 | else if (gadget->a_alt_hnp_support) |
| 1200 | DBG(dev, "HNP needs a different root port\n"); |
| 1201 | value = printer_set_config(dev, wValue); |
| 1202 | break; |
| 1203 | case USB_REQ_GET_CONFIGURATION: |
| 1204 | if (ctrl->bRequestType != USB_DIR_IN) |
| 1205 | break; |
| 1206 | *(u8 *)req->buf = dev->config; |
| 1207 | value = min(wLength, (u16) 1); |
| 1208 | break; |
| 1209 | |
| 1210 | case USB_REQ_SET_INTERFACE: |
| 1211 | if (ctrl->bRequestType != USB_RECIP_INTERFACE || |
| 1212 | !dev->config) |
| 1213 | break; |
| 1214 | |
| 1215 | value = set_interface(dev, PRINTER_INTERFACE); |
| 1216 | break; |
| 1217 | case USB_REQ_GET_INTERFACE: |
| 1218 | if (ctrl->bRequestType != |
| 1219 | (USB_DIR_IN|USB_RECIP_INTERFACE) |
| 1220 | || !dev->config) |
| 1221 | break; |
| 1222 | |
| 1223 | *(u8 *)req->buf = dev->interface; |
| 1224 | value = min(wLength, (u16) 1); |
| 1225 | break; |
| 1226 | |
| 1227 | default: |
| 1228 | goto unknown; |
| 1229 | } |
| 1230 | break; |
| 1231 | |
| 1232 | case USB_TYPE_CLASS: |
| 1233 | switch (ctrl->bRequest) { |
| 1234 | case 0: /* Get the IEEE-1284 PNP String */ |
| 1235 | /* Only one printer interface is supported. */ |
| 1236 | if ((wIndex>>8) != PRINTER_INTERFACE) |
| 1237 | break; |
| 1238 | |
| 1239 | value = (pnp_string[0]<<8)|pnp_string[1]; |
| 1240 | memcpy(req->buf, pnp_string, value); |
| 1241 | DBG(dev, "1284 PNP String: %x %s\n", value, |
| 1242 | &pnp_string[2]); |
| 1243 | break; |
| 1244 | |
| 1245 | case 1: /* Get Port Status */ |
| 1246 | /* Only one printer interface is supported. */ |
| 1247 | if (wIndex != PRINTER_INTERFACE) |
| 1248 | break; |
| 1249 | |
| 1250 | *(u8 *)req->buf = dev->printer_status; |
| 1251 | value = min(wLength, (u16) 1); |
| 1252 | break; |
| 1253 | |
| 1254 | case 2: /* Soft Reset */ |
| 1255 | /* Only one printer interface is supported. */ |
| 1256 | if (wIndex != PRINTER_INTERFACE) |
| 1257 | break; |
| 1258 | |
| 1259 | printer_soft_reset(dev); |
| 1260 | |
| 1261 | value = 0; |
| 1262 | break; |
| 1263 | |
| 1264 | default: |
| 1265 | goto unknown; |
| 1266 | } |
| 1267 | break; |
| 1268 | |
| 1269 | default: |
| 1270 | unknown: |
| 1271 | VDBG(dev, |
| 1272 | "unknown ctrl req%02x.%02x v%04x i%04x l%d\n", |
| 1273 | ctrl->bRequestType, ctrl->bRequest, |
| 1274 | wValue, wIndex, wLength); |
| 1275 | break; |
| 1276 | } |
| 1277 | |
| 1278 | /* respond with data transfer before status phase? */ |
| 1279 | if (value >= 0) { |
| 1280 | req->length = value; |
| 1281 | req->zero = value < wLength |
| 1282 | && (value % gadget->ep0->maxpacket) == 0; |
| 1283 | value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC); |
| 1284 | if (value < 0) { |
| 1285 | DBG(dev, "ep_queue --> %d\n", value); |
| 1286 | req->status = 0; |
| 1287 | printer_setup_complete(gadget->ep0, req); |
| 1288 | } |
| 1289 | } |
| 1290 | |
| 1291 | /* host either stalls (value < 0) or reports success */ |
| 1292 | return value; |
| 1293 | } |
| 1294 | |
| 1295 | static void |
| 1296 | printer_disconnect(struct usb_gadget *gadget) |
| 1297 | { |
| 1298 | struct printer_dev *dev = get_gadget_data(gadget); |
| 1299 | unsigned long flags; |
| 1300 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1301 | DBG(dev, "%s\n", __func__); |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 1302 | |
| 1303 | spin_lock_irqsave(&dev->lock, flags); |
| 1304 | |
| 1305 | printer_reset_interface(dev); |
| 1306 | |
| 1307 | spin_unlock_irqrestore(&dev->lock, flags); |
| 1308 | } |
| 1309 | |
| 1310 | static void |
| 1311 | printer_unbind(struct usb_gadget *gadget) |
| 1312 | { |
| 1313 | struct printer_dev *dev = get_gadget_data(gadget); |
| 1314 | struct usb_request *req; |
| 1315 | |
| 1316 | |
Harvey Harrison | 441b62c | 2008-03-03 16:08:34 -0800 | [diff] [blame] | 1317 | DBG(dev, "%s\n", __func__); |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 1318 | |
| 1319 | /* Remove sysfs files */ |
| 1320 | device_destroy(usb_gadget_class, g_printer_devno); |
| 1321 | |
| 1322 | /* Remove Character Device */ |
| 1323 | cdev_del(&dev->printer_cdev); |
| 1324 | |
| 1325 | /* we must already have been disconnected ... no i/o may be active */ |
| 1326 | WARN_ON(!list_empty(&dev->tx_reqs_active)); |
| 1327 | WARN_ON(!list_empty(&dev->rx_reqs_active)); |
| 1328 | |
| 1329 | /* Free all memory for this driver. */ |
| 1330 | while (!list_empty(&dev->tx_reqs)) { |
| 1331 | req = container_of(dev->tx_reqs.next, struct usb_request, |
| 1332 | list); |
| 1333 | list_del(&req->list); |
| 1334 | printer_req_free(dev->in_ep, req); |
| 1335 | } |
| 1336 | |
Adrian Bunk | efa66f1 | 2008-02-09 03:16:03 -0800 | [diff] [blame] | 1337 | if (dev->current_rx_req != NULL) |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 1338 | printer_req_free(dev->out_ep, dev->current_rx_req); |
| 1339 | |
| 1340 | while (!list_empty(&dev->rx_reqs)) { |
| 1341 | req = container_of(dev->rx_reqs.next, |
| 1342 | struct usb_request, list); |
| 1343 | list_del(&req->list); |
| 1344 | printer_req_free(dev->out_ep, req); |
| 1345 | } |
| 1346 | |
| 1347 | while (!list_empty(&dev->rx_buffers)) { |
| 1348 | req = container_of(dev->rx_buffers.next, |
| 1349 | struct usb_request, list); |
| 1350 | list_del(&req->list); |
| 1351 | printer_req_free(dev->out_ep, req); |
| 1352 | } |
| 1353 | |
| 1354 | if (dev->req) { |
| 1355 | printer_req_free(gadget->ep0, dev->req); |
| 1356 | dev->req = NULL; |
| 1357 | } |
| 1358 | |
| 1359 | set_gadget_data(gadget, NULL); |
| 1360 | } |
| 1361 | |
| 1362 | static int __init |
| 1363 | printer_bind(struct usb_gadget *gadget) |
| 1364 | { |
| 1365 | struct printer_dev *dev; |
| 1366 | struct usb_ep *in_ep, *out_ep; |
| 1367 | int status = -ENOMEM; |
| 1368 | int gcnum; |
| 1369 | size_t len; |
| 1370 | u32 i; |
| 1371 | struct usb_request *req; |
| 1372 | |
| 1373 | dev = &usb_printer_gadget; |
| 1374 | |
| 1375 | |
| 1376 | /* Setup the sysfs files for the printer gadget. */ |
Greg Kroah-Hartman | b0b090e | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 1377 | dev->pdev = device_create(usb_gadget_class, NULL, g_printer_devno, |
| 1378 | NULL, "g_printer"); |
Craig W. Nadler | 25a010c | 2007-11-11 15:00:15 -0800 | [diff] [blame] | 1379 | if (IS_ERR(dev->pdev)) { |
| 1380 | ERROR(dev, "Failed to create device: g_printer\n"); |
| 1381 | goto fail; |
| 1382 | } |
| 1383 | |
| 1384 | /* |
| 1385 | * Register a character device as an interface to a user mode |
| 1386 | * program that handles the printer specific functionality. |
| 1387 | */ |
| 1388 | cdev_init(&dev->printer_cdev, &printer_io_operations); |
| 1389 | dev->printer_cdev.owner = THIS_MODULE; |
| 1390 | status = cdev_add(&dev->printer_cdev, g_printer_devno, 1); |
| 1391 | if (status) { |
| 1392 | ERROR(dev, "Failed to open char device\n"); |
| 1393 | goto fail; |
| 1394 | } |
| 1395 | |
| 1396 | if (gadget_is_sa1100(gadget)) { |
| 1397 | /* hardware can't write zero length packets. */ |
| 1398 | ERROR(dev, "SA1100 controller is unsupport by this driver\n"); |
| 1399 | goto fail; |
| 1400 | } |
| 1401 | |
| 1402 | gcnum = usb_gadget_controller_number(gadget); |
| 1403 | if (gcnum >= 0) { |
| 1404 | device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum); |
| 1405 | } else { |
| 1406 | dev_warn(&gadget->dev, "controller '%s' not recognized\n", |
| 1407 | gadget->name); |
| 1408 | /* unrecognized, but safe unless bulk is REALLY quirky */ |
| 1409 | device_desc.bcdDevice = |
| 1410 | __constant_cpu_to_le16(0xFFFF); |
| 1411 | } |
| 1412 | snprintf(manufacturer, sizeof(manufacturer), "%s %s with %s", |
| 1413 | init_utsname()->sysname, init_utsname()->release, |
| 1414 | gadget->name); |
| 1415 | |
| 1416 | device_desc.idVendor = |
| 1417 | __constant_cpu_to_le16(PRINTER_VENDOR_NUM); |
| 1418 | device_desc.idProduct = |
| 1419 | __constant_cpu_to_le16(PRINTER_PRODUCT_NUM); |
| 1420 | |
| 1421 | /* support optional vendor/distro customization */ |
| 1422 | if (idVendor) { |
| 1423 | if (!idProduct) { |
| 1424 | dev_err(&gadget->dev, "idVendor needs idProduct!\n"); |
| 1425 | return -ENODEV; |
| 1426 | } |
| 1427 | device_desc.idVendor = cpu_to_le16(idVendor); |
| 1428 | device_desc.idProduct = cpu_to_le16(idProduct); |
| 1429 | if (bcdDevice) |
| 1430 | device_desc.bcdDevice = cpu_to_le16(bcdDevice); |
| 1431 | } |
| 1432 | |
| 1433 | if (iManufacturer) |
| 1434 | strlcpy(manufacturer, iManufacturer, sizeof manufacturer); |
| 1435 | |
| 1436 | if (iProduct) |
| 1437 | strlcpy(product_desc, iProduct, sizeof product_desc); |
| 1438 | |
| 1439 | if (iSerialNum) |
| 1440 | strlcpy(serial_num, iSerialNum, sizeof serial_num); |
| 1441 | |
| 1442 | if (iPNPstring) |
| 1443 | strlcpy(&pnp_string[2], iPNPstring, (sizeof pnp_string)-2); |
| 1444 | |
| 1445 | len = strlen(pnp_string); |
| 1446 | pnp_string[0] = (len >> 8) & 0xFF; |
| 1447 | pnp_string[1] = len & 0xFF; |
| 1448 | |
| 1449 | /* all we really need is bulk IN/OUT */ |
| 1450 | usb_ep_autoconfig_reset(gadget); |
| 1451 | in_ep = usb_ep_autoconfig(gadget, &fs_ep_in_desc); |
| 1452 | if (!in_ep) { |
| 1453 | autoconf_fail: |
| 1454 | dev_err(&gadget->dev, "can't autoconfigure on %s\n", |
| 1455 | gadget->name); |
| 1456 | return -ENODEV; |
| 1457 | } |
| 1458 | in_ep->driver_data = in_ep; /* claim */ |
| 1459 | |
| 1460 | out_ep = usb_ep_autoconfig(gadget, &fs_ep_out_desc); |
| 1461 | if (!out_ep) |
| 1462 | goto autoconf_fail; |
| 1463 | out_ep->driver_data = out_ep; /* claim */ |
| 1464 | |
| 1465 | #ifdef CONFIG_USB_GADGET_DUALSPEED |
| 1466 | /* assumes ep0 uses the same value for both speeds ... */ |
| 1467 | dev_qualifier.bMaxPacketSize0 = device_desc.bMaxPacketSize0; |
| 1468 | |
| 1469 | /* and that all endpoints are dual-speed */ |
| 1470 | hs_ep_in_desc.bEndpointAddress = fs_ep_in_desc.bEndpointAddress; |
| 1471 | hs_ep_out_desc.bEndpointAddress = fs_ep_out_desc.bEndpointAddress; |
| 1472 | #endif /* DUALSPEED */ |
| 1473 | |
| 1474 | device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket; |
| 1475 | usb_gadget_set_selfpowered(gadget); |
| 1476 | |
| 1477 | if (gadget->is_otg) { |
| 1478 | otg_desc.bmAttributes |= USB_OTG_HNP, |
| 1479 | config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP; |
| 1480 | config_desc.bMaxPower = 4; |
| 1481 | } |
| 1482 | |
| 1483 | spin_lock_init(&dev->lock); |
| 1484 | spin_lock_init(&dev->lock_printer_io); |
| 1485 | INIT_LIST_HEAD(&dev->tx_reqs); |
| 1486 | INIT_LIST_HEAD(&dev->tx_reqs_active); |
| 1487 | INIT_LIST_HEAD(&dev->rx_reqs); |
| 1488 | INIT_LIST_HEAD(&dev->rx_reqs_active); |
| 1489 | INIT_LIST_HEAD(&dev->rx_buffers); |
| 1490 | init_waitqueue_head(&dev->rx_wait); |
| 1491 | init_waitqueue_head(&dev->tx_wait); |
| 1492 | init_waitqueue_head(&dev->tx_flush_wait); |
| 1493 | |
| 1494 | dev->config = 0; |
| 1495 | dev->interface = -1; |
| 1496 | dev->printer_cdev_open = 0; |
| 1497 | dev->printer_status = PRINTER_NOT_ERROR; |
| 1498 | dev->current_rx_req = NULL; |
| 1499 | dev->current_rx_bytes = 0; |
| 1500 | dev->current_rx_buf = NULL; |
| 1501 | |
| 1502 | dev->in_ep = in_ep; |
| 1503 | dev->out_ep = out_ep; |
| 1504 | |
| 1505 | /* preallocate control message data and buffer */ |
| 1506 | dev->req = printer_req_alloc(gadget->ep0, USB_DESC_BUFSIZE, |
| 1507 | GFP_KERNEL); |
| 1508 | if (!dev->req) { |
| 1509 | status = -ENOMEM; |
| 1510 | goto fail; |
| 1511 | } |
| 1512 | |
| 1513 | for (i = 0; i < QLEN; i++) { |
| 1514 | req = printer_req_alloc(dev->in_ep, USB_BUFSIZE, GFP_KERNEL); |
| 1515 | if (!req) { |
| 1516 | while (!list_empty(&dev->tx_reqs)) { |
| 1517 | req = container_of(dev->tx_reqs.next, |
| 1518 | struct usb_request, list); |
| 1519 | list_del(&req->list); |
| 1520 | printer_req_free(dev->in_ep, req); |
| 1521 | } |
| 1522 | return -ENOMEM; |
| 1523 | } |
| 1524 | list_add(&req->list, &dev->tx_reqs); |
| 1525 | } |
| 1526 | |
| 1527 | for (i = 0; i < QLEN; i++) { |
| 1528 | req = printer_req_alloc(dev->out_ep, USB_BUFSIZE, GFP_KERNEL); |
| 1529 | if (!req) { |
| 1530 | while (!list_empty(&dev->rx_reqs)) { |
| 1531 | req = container_of(dev->rx_reqs.next, |
| 1532 | struct usb_request, list); |
| 1533 | list_del(&req->list); |
| 1534 | printer_req_free(dev->out_ep, req); |
| 1535 | } |
| 1536 | return -ENOMEM; |
| 1537 | } |
| 1538 | list_add(&req->list, &dev->rx_reqs); |
| 1539 | } |
| 1540 | |
| 1541 | dev->req->complete = printer_setup_complete; |
| 1542 | |
| 1543 | /* finish hookup to lower layer ... */ |
| 1544 | dev->gadget = gadget; |
| 1545 | set_gadget_data(gadget, dev); |
| 1546 | gadget->ep0->driver_data = dev; |
| 1547 | |
| 1548 | INFO(dev, "%s, version: " DRIVER_VERSION "\n", driver_desc); |
| 1549 | INFO(dev, "using %s, OUT %s IN %s\n", gadget->name, out_ep->name, |
| 1550 | in_ep->name); |
| 1551 | |
| 1552 | return 0; |
| 1553 | |
| 1554 | fail: |
| 1555 | printer_unbind(gadget); |
| 1556 | return status; |
| 1557 | } |
| 1558 | |
| 1559 | /*-------------------------------------------------------------------------*/ |
| 1560 | |
| 1561 | static struct usb_gadget_driver printer_driver = { |
| 1562 | .speed = DEVSPEED, |
| 1563 | |
| 1564 | .function = (char *) driver_desc, |
| 1565 | .bind = printer_bind, |
| 1566 | .unbind = printer_unbind, |
| 1567 | |
| 1568 | .setup = printer_setup, |
| 1569 | .disconnect = printer_disconnect, |
| 1570 | |
| 1571 | .driver = { |
| 1572 | .name = (char *) shortname, |
| 1573 | .owner = THIS_MODULE, |
| 1574 | }, |
| 1575 | }; |
| 1576 | |
| 1577 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 1578 | MODULE_AUTHOR("Craig Nadler"); |
| 1579 | MODULE_LICENSE("GPL"); |
| 1580 | |
| 1581 | static int __init |
| 1582 | init(void) |
| 1583 | { |
| 1584 | int status; |
| 1585 | |
| 1586 | usb_gadget_class = class_create(THIS_MODULE, "usb_printer_gadget"); |
| 1587 | if (IS_ERR(usb_gadget_class)) { |
| 1588 | status = PTR_ERR(usb_gadget_class); |
| 1589 | ERROR(dev, "unable to create usb_gadget class %d\n", status); |
| 1590 | return status; |
| 1591 | } |
| 1592 | |
| 1593 | status = alloc_chrdev_region(&g_printer_devno, 0, 1, |
| 1594 | "USB printer gadget"); |
| 1595 | if (status) { |
| 1596 | ERROR(dev, "alloc_chrdev_region %d\n", status); |
| 1597 | class_destroy(usb_gadget_class); |
| 1598 | return status; |
| 1599 | } |
| 1600 | |
| 1601 | status = usb_gadget_register_driver(&printer_driver); |
| 1602 | if (status) { |
| 1603 | class_destroy(usb_gadget_class); |
| 1604 | unregister_chrdev_region(g_printer_devno, 1); |
| 1605 | DBG(dev, "usb_gadget_register_driver %x\n", status); |
| 1606 | } |
| 1607 | |
| 1608 | return status; |
| 1609 | } |
| 1610 | module_init(init); |
| 1611 | |
| 1612 | static void __exit |
| 1613 | cleanup(void) |
| 1614 | { |
| 1615 | int status; |
| 1616 | |
| 1617 | spin_lock(&usb_printer_gadget.lock_printer_io); |
| 1618 | class_destroy(usb_gadget_class); |
| 1619 | unregister_chrdev_region(g_printer_devno, 2); |
| 1620 | |
| 1621 | status = usb_gadget_unregister_driver(&printer_driver); |
| 1622 | if (status) |
| 1623 | ERROR(dev, "usb_gadget_unregister_driver %x\n", status); |
| 1624 | |
| 1625 | spin_unlock(&usb_printer_gadget.lock_printer_io); |
| 1626 | } |
| 1627 | module_exit(cleanup); |