Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* Driver for USB Mass Storage compliant devices |
| 2 | * |
| 3 | * $Id: usb.c,v 1.75 2002/04/22 03:39:43 mdharm Exp $ |
| 4 | * |
| 5 | * Current development and maintenance by: |
| 6 | * (c) 1999-2003 Matthew Dharm (mdharm-usb@one-eyed-alien.net) |
| 7 | * |
| 8 | * Developed with the assistance of: |
| 9 | * (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org) |
| 10 | * (c) 2003 Alan Stern (stern@rowland.harvard.edu) |
| 11 | * |
| 12 | * Initial work by: |
| 13 | * (c) 1999 Michael Gee (michael@linuxspecific.com) |
| 14 | * |
| 15 | * usb_device_id support by Adam J. Richter (adam@yggdrasil.com): |
| 16 | * (c) 2000 Yggdrasil Computing, Inc. |
| 17 | * |
| 18 | * This driver is based on the 'USB Mass Storage Class' document. This |
| 19 | * describes in detail the protocol used to communicate with such |
| 20 | * devices. Clearly, the designers had SCSI and ATAPI commands in |
| 21 | * mind when they created this document. The commands are all very |
| 22 | * similar to commands in the SCSI-II and ATAPI specifications. |
| 23 | * |
| 24 | * It is important to note that in a number of cases this class |
| 25 | * exhibits class-specific exemptions from the USB specification. |
| 26 | * Notably the usage of NAK, STALL and ACK differs from the norm, in |
| 27 | * that they are used to communicate wait, failed and OK on commands. |
| 28 | * |
| 29 | * Also, for certain devices, the interrupt endpoint is used to convey |
| 30 | * status of a command. |
| 31 | * |
| 32 | * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more |
| 33 | * information about this driver. |
| 34 | * |
| 35 | * This program is free software; you can redistribute it and/or modify it |
| 36 | * under the terms of the GNU General Public License as published by the |
| 37 | * Free Software Foundation; either version 2, or (at your option) any |
| 38 | * later version. |
| 39 | * |
| 40 | * This program is distributed in the hope that it will be useful, but |
| 41 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 42 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 43 | * General Public License for more details. |
| 44 | * |
| 45 | * You should have received a copy of the GNU General Public License along |
| 46 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 47 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 48 | */ |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <linux/sched.h> |
| 51 | #include <linux/errno.h> |
Nigel Cunningham | 7dfb710 | 2006-12-06 20:34:23 -0800 | [diff] [blame^] | 52 | #include <linux/freezer.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include <linux/module.h> |
| 54 | #include <linux/init.h> |
| 55 | #include <linux/slab.h> |
Alan Stern | 3f13e66 | 2005-10-23 19:43:36 -0700 | [diff] [blame] | 56 | #include <linux/kthread.h> |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 57 | #include <linux/mutex.h> |
Phil Dibowitz | 5650b4d | 2006-06-24 17:27:54 -0700 | [diff] [blame] | 58 | #include <linux/utsrelease.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | #include <scsi/scsi.h> |
| 61 | #include <scsi/scsi_cmnd.h> |
| 62 | #include <scsi/scsi_device.h> |
| 63 | |
| 64 | #include "usb.h" |
| 65 | #include "scsiglue.h" |
| 66 | #include "transport.h" |
| 67 | #include "protocol.h" |
| 68 | #include "debug.h" |
| 69 | #include "initializers.h" |
| 70 | |
| 71 | #ifdef CONFIG_USB_STORAGE_USBAT |
| 72 | #include "shuttle_usbat.h" |
| 73 | #endif |
| 74 | #ifdef CONFIG_USB_STORAGE_SDDR09 |
| 75 | #include "sddr09.h" |
| 76 | #endif |
| 77 | #ifdef CONFIG_USB_STORAGE_SDDR55 |
| 78 | #include "sddr55.h" |
| 79 | #endif |
| 80 | #ifdef CONFIG_USB_STORAGE_DPCM |
| 81 | #include "dpcm.h" |
| 82 | #endif |
| 83 | #ifdef CONFIG_USB_STORAGE_FREECOM |
| 84 | #include "freecom.h" |
| 85 | #endif |
| 86 | #ifdef CONFIG_USB_STORAGE_ISD200 |
| 87 | #include "isd200.h" |
| 88 | #endif |
| 89 | #ifdef CONFIG_USB_STORAGE_DATAFAB |
| 90 | #include "datafab.h" |
| 91 | #endif |
| 92 | #ifdef CONFIG_USB_STORAGE_JUMPSHOT |
| 93 | #include "jumpshot.h" |
| 94 | #endif |
Matthew Dharm | 34008db | 2005-07-28 14:49:01 -0700 | [diff] [blame] | 95 | #ifdef CONFIG_USB_STORAGE_ONETOUCH |
| 96 | #include "onetouch.h" |
| 97 | #endif |
Matthew Dharm | e80b0fa | 2005-12-04 22:02:44 -0800 | [diff] [blame] | 98 | #ifdef CONFIG_USB_STORAGE_ALAUDA |
| 99 | #include "alauda.h" |
| 100 | #endif |
Matthew Dharm | dfe0d3b | 2006-08-13 17:30:14 -0700 | [diff] [blame] | 101 | #ifdef CONFIG_USB_STORAGE_KARMA |
| 102 | #include "karma.h" |
| 103 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
| 105 | /* Some informational data */ |
| 106 | MODULE_AUTHOR("Matthew Dharm <mdharm-usb@one-eyed-alien.net>"); |
| 107 | MODULE_DESCRIPTION("USB Mass Storage driver for Linux"); |
| 108 | MODULE_LICENSE("GPL"); |
| 109 | |
| 110 | static unsigned int delay_use = 5; |
| 111 | module_param(delay_use, uint, S_IRUGO | S_IWUSR); |
| 112 | MODULE_PARM_DESC(delay_use, "seconds to delay before using a new device"); |
| 113 | |
| 114 | |
| 115 | /* These are used to make sure the module doesn't unload before all the |
| 116 | * threads have exited. |
| 117 | */ |
| 118 | static atomic_t total_threads = ATOMIC_INIT(0); |
| 119 | static DECLARE_COMPLETION(threads_gone); |
| 120 | |
| 121 | |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 122 | /* |
| 123 | * The entries in this table correspond, line for line, |
| 124 | * with the entries of us_unusual_dev_list[]. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | */ |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 126 | #ifndef CONFIG_USB_LIBUSUAL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
| 128 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ |
| 129 | vendorName, productName,useProtocol, useTransport, \ |
| 130 | initFunction, flags) \ |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 131 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin,bcdDeviceMax), \ |
| 132 | .driver_info = (flags)|(USB_US_TYPE_STOR<<24) } |
| 133 | |
| 134 | #define USUAL_DEV(useProto, useTrans, useType) \ |
| 135 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, useProto, useTrans), \ |
| 136 | .driver_info = (USB_US_TYPE_STOR<<24) } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
| 138 | static struct usb_device_id storage_usb_ids [] = { |
| 139 | |
| 140 | # include "unusual_devs.h" |
| 141 | #undef UNUSUAL_DEV |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 142 | #undef USUAL_DEV |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | /* Terminating entry */ |
| 144 | { } |
| 145 | }; |
| 146 | |
| 147 | MODULE_DEVICE_TABLE (usb, storage_usb_ids); |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 148 | #endif /* CONFIG_USB_LIBUSUAL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
| 150 | /* This is the list of devices we recognize, along with their flag data */ |
| 151 | |
| 152 | /* The vendor name should be kept at eight characters or less, and |
| 153 | * the product name should be kept at 16 characters or less. If a device |
| 154 | * has the US_FL_FIX_INQUIRY flag, then the vendor and product names |
| 155 | * normally generated by a device thorugh the INQUIRY response will be |
| 156 | * taken from this list, and this is the reason for the above size |
| 157 | * restriction. However, if the flag is not present, then you |
| 158 | * are free to use as many characters as you like. |
| 159 | */ |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \ |
| 162 | vendor_name, product_name, use_protocol, use_transport, \ |
| 163 | init_function, Flags) \ |
| 164 | { \ |
| 165 | .vendorName = vendor_name, \ |
| 166 | .productName = product_name, \ |
| 167 | .useProtocol = use_protocol, \ |
| 168 | .useTransport = use_transport, \ |
| 169 | .initFunction = init_function, \ |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | #define USUAL_DEV(use_protocol, use_transport, use_type) \ |
| 173 | { \ |
| 174 | .useProtocol = use_protocol, \ |
| 175 | .useTransport = use_transport, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | } |
| 177 | |
| 178 | static struct us_unusual_dev us_unusual_dev_list[] = { |
| 179 | # include "unusual_devs.h" |
| 180 | # undef UNUSUAL_DEV |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 181 | # undef USUAL_DEV |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
| 183 | /* Terminating entry */ |
| 184 | { NULL } |
| 185 | }; |
| 186 | |
Alan Stern | ce2596d | 2005-10-23 19:41:39 -0700 | [diff] [blame] | 187 | |
| 188 | #ifdef CONFIG_PM /* Minimal support for suspend and resume */ |
| 189 | |
| 190 | static int storage_suspend(struct usb_interface *iface, pm_message_t message) |
| 191 | { |
| 192 | struct us_data *us = usb_get_intfdata(iface); |
| 193 | |
| 194 | /* Wait until no command is running */ |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 195 | mutex_lock(&us->dev_mutex); |
Alan Stern | ce2596d | 2005-10-23 19:41:39 -0700 | [diff] [blame] | 196 | |
| 197 | US_DEBUGP("%s\n", __FUNCTION__); |
Matthew Dharm | 7931e1c | 2005-12-04 21:56:51 -0800 | [diff] [blame] | 198 | if (us->suspend_resume_hook) |
| 199 | (us->suspend_resume_hook)(us, US_SUSPEND); |
Alan Stern | ce2596d | 2005-10-23 19:41:39 -0700 | [diff] [blame] | 200 | iface->dev.power.power_state.event = message.event; |
| 201 | |
| 202 | /* When runtime PM is working, we'll set a flag to indicate |
| 203 | * whether we should autoresume when a SCSI request arrives. */ |
| 204 | |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 205 | mutex_unlock(&us->dev_mutex); |
Alan Stern | ce2596d | 2005-10-23 19:41:39 -0700 | [diff] [blame] | 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | static int storage_resume(struct usb_interface *iface) |
| 210 | { |
| 211 | struct us_data *us = usb_get_intfdata(iface); |
| 212 | |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 213 | mutex_lock(&us->dev_mutex); |
Alan Stern | ce2596d | 2005-10-23 19:41:39 -0700 | [diff] [blame] | 214 | |
| 215 | US_DEBUGP("%s\n", __FUNCTION__); |
Matthew Dharm | 7931e1c | 2005-12-04 21:56:51 -0800 | [diff] [blame] | 216 | if (us->suspend_resume_hook) |
| 217 | (us->suspend_resume_hook)(us, US_RESUME); |
Alan Stern | ce2596d | 2005-10-23 19:41:39 -0700 | [diff] [blame] | 218 | iface->dev.power.power_state.event = PM_EVENT_ON; |
| 219 | |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 220 | mutex_unlock(&us->dev_mutex); |
Alan Stern | ce2596d | 2005-10-23 19:41:39 -0700 | [diff] [blame] | 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | #endif /* CONFIG_PM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
| 226 | /* |
Alan Stern | 47104b0 | 2006-06-01 13:52:56 -0400 | [diff] [blame] | 227 | * The next two routines get called just before and just after |
| 228 | * a USB port reset, whether from this driver or a different one. |
| 229 | */ |
| 230 | |
| 231 | static void storage_pre_reset(struct usb_interface *iface) |
| 232 | { |
| 233 | struct us_data *us = usb_get_intfdata(iface); |
| 234 | |
| 235 | US_DEBUGP("%s\n", __FUNCTION__); |
| 236 | |
| 237 | /* Make sure no command runs during the reset */ |
| 238 | mutex_lock(&us->dev_mutex); |
| 239 | } |
| 240 | |
| 241 | static void storage_post_reset(struct usb_interface *iface) |
| 242 | { |
| 243 | struct us_data *us = usb_get_intfdata(iface); |
| 244 | |
| 245 | US_DEBUGP("%s\n", __FUNCTION__); |
| 246 | |
| 247 | /* Report the reset to the SCSI core */ |
| 248 | scsi_lock(us_to_host(us)); |
| 249 | usb_stor_report_bus_reset(us); |
| 250 | scsi_unlock(us_to_host(us)); |
| 251 | |
| 252 | /* FIXME: Notify the subdrivers that they need to reinitialize |
| 253 | * the device */ |
| 254 | mutex_unlock(&us->dev_mutex); |
| 255 | } |
| 256 | |
| 257 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | * fill_inquiry_response takes an unsigned char array (which must |
| 259 | * be at least 36 characters) and populates the vendor name, |
| 260 | * product name, and revision fields. Then the array is copied |
| 261 | * into the SCSI command's response buffer (oddly enough |
| 262 | * called request_buffer). data_len contains the length of the |
| 263 | * data array, which again must be at least 36. |
| 264 | */ |
| 265 | |
| 266 | void fill_inquiry_response(struct us_data *us, unsigned char *data, |
| 267 | unsigned int data_len) |
| 268 | { |
| 269 | if (data_len<36) // You lose. |
| 270 | return; |
| 271 | |
| 272 | if(data[0]&0x20) { /* USB device currently not connected. Return |
| 273 | peripheral qualifier 001b ("...however, the |
| 274 | physical device is not currently connected |
| 275 | to this logical unit") and leave vendor and |
| 276 | product identification empty. ("If the target |
| 277 | does store some of the INQUIRY data on the |
| 278 | device, it may return zeros or ASCII spaces |
| 279 | (20h) in those fields until the data is |
| 280 | available from the device."). */ |
| 281 | memset(data+8,0,28); |
| 282 | } else { |
| 283 | u16 bcdDevice = le16_to_cpu(us->pusb_dev->descriptor.bcdDevice); |
| 284 | memcpy(data+8, us->unusual_dev->vendorName, |
| 285 | strlen(us->unusual_dev->vendorName) > 8 ? 8 : |
| 286 | strlen(us->unusual_dev->vendorName)); |
| 287 | memcpy(data+16, us->unusual_dev->productName, |
| 288 | strlen(us->unusual_dev->productName) > 16 ? 16 : |
| 289 | strlen(us->unusual_dev->productName)); |
| 290 | data[32] = 0x30 + ((bcdDevice>>12) & 0x0F); |
| 291 | data[33] = 0x30 + ((bcdDevice>>8) & 0x0F); |
| 292 | data[34] = 0x30 + ((bcdDevice>>4) & 0x0F); |
| 293 | data[35] = 0x30 + ((bcdDevice) & 0x0F); |
| 294 | } |
| 295 | |
| 296 | usb_stor_set_xfer_buf(data, data_len, us->srb); |
| 297 | } |
| 298 | |
| 299 | static int usb_stor_control_thread(void * __us) |
| 300 | { |
| 301 | struct us_data *us = (struct us_data *)__us; |
| 302 | struct Scsi_Host *host = us_to_host(us); |
| 303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | current->flags |= PF_NOFREEZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | for(;;) { |
| 307 | US_DEBUGP("*** thread sleeping.\n"); |
| 308 | if(down_interruptible(&us->sema)) |
| 309 | break; |
| 310 | |
| 311 | US_DEBUGP("*** thread awakened.\n"); |
| 312 | |
| 313 | /* lock the device pointers */ |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 314 | mutex_lock(&(us->dev_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | /* if the device has disconnected, we are free to exit */ |
| 317 | if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) { |
| 318 | US_DEBUGP("-- exiting\n"); |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 319 | mutex_unlock(&us->dev_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | break; |
| 321 | } |
| 322 | |
| 323 | /* lock access to the state */ |
| 324 | scsi_lock(host); |
| 325 | |
| 326 | /* has the command timed out *already* ? */ |
| 327 | if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) { |
| 328 | us->srb->result = DID_ABORT << 16; |
| 329 | goto SkipForAbort; |
| 330 | } |
| 331 | |
| 332 | scsi_unlock(host); |
| 333 | |
| 334 | /* reject the command if the direction indicator |
| 335 | * is UNKNOWN |
| 336 | */ |
| 337 | if (us->srb->sc_data_direction == DMA_BIDIRECTIONAL) { |
| 338 | US_DEBUGP("UNKNOWN data direction\n"); |
| 339 | us->srb->result = DID_ERROR << 16; |
| 340 | } |
| 341 | |
| 342 | /* reject if target != 0 or if LUN is higher than |
| 343 | * the maximum known LUN |
| 344 | */ |
| 345 | else if (us->srb->device->id && |
| 346 | !(us->flags & US_FL_SCM_MULT_TARG)) { |
| 347 | US_DEBUGP("Bad target number (%d:%d)\n", |
| 348 | us->srb->device->id, us->srb->device->lun); |
| 349 | us->srb->result = DID_BAD_TARGET << 16; |
| 350 | } |
| 351 | |
| 352 | else if (us->srb->device->lun > us->max_lun) { |
| 353 | US_DEBUGP("Bad LUN (%d:%d)\n", |
| 354 | us->srb->device->id, us->srb->device->lun); |
| 355 | us->srb->result = DID_BAD_TARGET << 16; |
| 356 | } |
| 357 | |
| 358 | /* Handle those devices which need us to fake |
| 359 | * their inquiry data */ |
| 360 | else if ((us->srb->cmnd[0] == INQUIRY) && |
| 361 | (us->flags & US_FL_FIX_INQUIRY)) { |
| 362 | unsigned char data_ptr[36] = { |
| 363 | 0x00, 0x80, 0x02, 0x02, |
| 364 | 0x1F, 0x00, 0x00, 0x00}; |
| 365 | |
| 366 | US_DEBUGP("Faking INQUIRY command\n"); |
| 367 | fill_inquiry_response(us, data_ptr, 36); |
| 368 | us->srb->result = SAM_STAT_GOOD; |
| 369 | } |
| 370 | |
| 371 | /* we've got a command, let's do it! */ |
| 372 | else { |
| 373 | US_DEBUG(usb_stor_show_command(us->srb)); |
| 374 | us->proto_handler(us->srb, us); |
| 375 | } |
| 376 | |
| 377 | /* lock access to the state */ |
| 378 | scsi_lock(host); |
| 379 | |
Alan Stern | eecd11e | 2006-06-19 14:50:15 -0400 | [diff] [blame] | 380 | /* did the command already complete because of a disconnect? */ |
| 381 | if (!us->srb) |
| 382 | ; /* nothing to do */ |
| 383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | /* indicate that the command is done */ |
Alan Stern | eecd11e | 2006-06-19 14:50:15 -0400 | [diff] [blame] | 385 | else if (us->srb->result != DID_ABORT << 16) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | US_DEBUGP("scsi cmd done, result=0x%x\n", |
| 387 | us->srb->result); |
| 388 | us->srb->scsi_done(us->srb); |
| 389 | } else { |
| 390 | SkipForAbort: |
| 391 | US_DEBUGP("scsi command aborted\n"); |
| 392 | } |
| 393 | |
| 394 | /* If an abort request was received we need to signal that |
| 395 | * the abort has finished. The proper test for this is |
| 396 | * the TIMED_OUT flag, not srb->result == DID_ABORT, because |
Matthew Dharm | 226173e | 2005-08-25 20:03:50 -0700 | [diff] [blame] | 397 | * the timeout might have occurred after the command had |
| 398 | * already completed with a different result code. */ |
| 399 | if (test_bit(US_FLIDX_TIMED_OUT, &us->flags)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | complete(&(us->notify)); |
| 401 | |
Matthew Dharm | 226173e | 2005-08-25 20:03:50 -0700 | [diff] [blame] | 402 | /* Allow USB transfers to resume */ |
| 403 | clear_bit(US_FLIDX_ABORTING, &us->flags); |
| 404 | clear_bit(US_FLIDX_TIMED_OUT, &us->flags); |
| 405 | } |
| 406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | /* finished working on this command */ |
| 408 | us->srb = NULL; |
| 409 | scsi_unlock(host); |
| 410 | |
| 411 | /* unlock the device pointers */ |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 412 | mutex_unlock(&us->dev_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | } /* for (;;) */ |
| 414 | |
| 415 | scsi_host_put(host); |
| 416 | |
| 417 | /* notify the exit routine that we're actually exiting now |
| 418 | * |
| 419 | * complete()/wait_for_completion() is similar to up()/down(), |
| 420 | * except that complete() is safe in the case where the structure |
| 421 | * is getting deleted in a parallel mode of execution (i.e. just |
| 422 | * after the down() -- that's necessary for the thread-shutdown |
| 423 | * case. |
| 424 | * |
| 425 | * complete_and_exit() goes even further than this -- it is safe in |
| 426 | * the case that the thread of the caller is going away (not just |
| 427 | * the structure) -- this is necessary for the module-remove case. |
| 428 | * This is important in preemption kernels, which transfer the flow |
| 429 | * of execution immediately upon a complete(). |
| 430 | */ |
| 431 | complete_and_exit(&threads_gone, 0); |
| 432 | } |
| 433 | |
| 434 | /*********************************************************************** |
| 435 | * Device probing and disconnecting |
| 436 | ***********************************************************************/ |
| 437 | |
| 438 | /* Associate our private data with the USB device */ |
| 439 | static int associate_dev(struct us_data *us, struct usb_interface *intf) |
| 440 | { |
| 441 | US_DEBUGP("-- %s\n", __FUNCTION__); |
| 442 | |
| 443 | /* Fill in the device-related fields */ |
| 444 | us->pusb_dev = interface_to_usbdev(intf); |
| 445 | us->pusb_intf = intf; |
| 446 | us->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; |
| 447 | US_DEBUGP("Vendor: 0x%04x, Product: 0x%04x, Revision: 0x%04x\n", |
| 448 | le16_to_cpu(us->pusb_dev->descriptor.idVendor), |
| 449 | le16_to_cpu(us->pusb_dev->descriptor.idProduct), |
| 450 | le16_to_cpu(us->pusb_dev->descriptor.bcdDevice)); |
| 451 | US_DEBUGP("Interface Subclass: 0x%02x, Protocol: 0x%02x\n", |
| 452 | intf->cur_altsetting->desc.bInterfaceSubClass, |
| 453 | intf->cur_altsetting->desc.bInterfaceProtocol); |
| 454 | |
| 455 | /* Store our private data in the interface */ |
| 456 | usb_set_intfdata(intf, us); |
| 457 | |
| 458 | /* Allocate the device-related DMA-mapped buffers */ |
| 459 | us->cr = usb_buffer_alloc(us->pusb_dev, sizeof(*us->cr), |
| 460 | GFP_KERNEL, &us->cr_dma); |
| 461 | if (!us->cr) { |
| 462 | US_DEBUGP("usb_ctrlrequest allocation failed\n"); |
| 463 | return -ENOMEM; |
| 464 | } |
| 465 | |
| 466 | us->iobuf = usb_buffer_alloc(us->pusb_dev, US_IOBUF_SIZE, |
| 467 | GFP_KERNEL, &us->iobuf_dma); |
| 468 | if (!us->iobuf) { |
| 469 | US_DEBUGP("I/O buffer allocation failed\n"); |
| 470 | return -ENOMEM; |
| 471 | } |
Alan Stern | bbafa46 | 2005-10-23 19:40:22 -0700 | [diff] [blame] | 472 | |
| 473 | us->sensebuf = kmalloc(US_SENSE_SIZE, GFP_KERNEL); |
| 474 | if (!us->sensebuf) { |
| 475 | US_DEBUGP("Sense buffer allocation failed\n"); |
| 476 | return -ENOMEM; |
| 477 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | return 0; |
| 479 | } |
| 480 | |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 481 | /* Find an unusual_dev descriptor (always succeeds in the current code) */ |
| 482 | static struct us_unusual_dev *find_unusual(const struct usb_device_id *id) |
| 483 | { |
| 484 | const int id_index = id - storage_usb_ids; |
| 485 | return &us_unusual_dev_list[id_index]; |
| 486 | } |
| 487 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | /* Get the unusual_devs entries and the string descriptors */ |
Daniel Drake | 3c33242 | 2006-07-26 13:59:23 +0100 | [diff] [blame] | 489 | static int get_device_info(struct us_data *us, const struct usb_device_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | { |
| 491 | struct usb_device *dev = us->pusb_dev; |
| 492 | struct usb_interface_descriptor *idesc = |
| 493 | &us->pusb_intf->cur_altsetting->desc; |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 494 | struct us_unusual_dev *unusual_dev = find_unusual(id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | |
| 496 | /* Store the entries */ |
| 497 | us->unusual_dev = unusual_dev; |
| 498 | us->subclass = (unusual_dev->useProtocol == US_SC_DEVICE) ? |
| 499 | idesc->bInterfaceSubClass : |
| 500 | unusual_dev->useProtocol; |
| 501 | us->protocol = (unusual_dev->useTransport == US_PR_DEVICE) ? |
| 502 | idesc->bInterfaceProtocol : |
| 503 | unusual_dev->useTransport; |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 504 | us->flags = USB_US_ORIG_FLAGS(id->driver_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
Daniel Drake | 3c33242 | 2006-07-26 13:59:23 +0100 | [diff] [blame] | 506 | if (us->flags & US_FL_IGNORE_DEVICE) { |
| 507 | printk(KERN_INFO USB_STORAGE "device ignored\n"); |
| 508 | return -ENODEV; |
| 509 | } |
| 510 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | /* |
| 512 | * This flag is only needed when we're in high-speed, so let's |
| 513 | * disable it if we're in full-speed |
| 514 | */ |
| 515 | if (dev->speed != USB_SPEED_HIGH) |
| 516 | us->flags &= ~US_FL_GO_SLOW; |
| 517 | |
| 518 | /* Log a message if a non-generic unusual_dev entry contains an |
| 519 | * unnecessary subclass or protocol override. This may stimulate |
| 520 | * reports from users that will help us remove unneeded entries |
| 521 | * from the unusual_devs.h table. |
| 522 | */ |
| 523 | if (id->idVendor || id->idProduct) { |
Arjan van de Ven | 4c4c943 | 2005-11-29 09:43:42 +0100 | [diff] [blame] | 524 | static const char *msgs[3] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | "an unneeded SubClass entry", |
| 526 | "an unneeded Protocol entry", |
| 527 | "unneeded SubClass and Protocol entries"}; |
| 528 | struct usb_device_descriptor *ddesc = &dev->descriptor; |
| 529 | int msg = -1; |
| 530 | |
| 531 | if (unusual_dev->useProtocol != US_SC_DEVICE && |
| 532 | us->subclass == idesc->bInterfaceSubClass) |
| 533 | msg += 1; |
| 534 | if (unusual_dev->useTransport != US_PR_DEVICE && |
| 535 | us->protocol == idesc->bInterfaceProtocol) |
| 536 | msg += 2; |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 537 | if (msg >= 0 && !(us->flags & US_FL_NEED_OVERRIDE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | printk(KERN_NOTICE USB_STORAGE "This device " |
| 539 | "(%04x,%04x,%04x S %02x P %02x)" |
Phil Dibowitz | 5650b4d | 2006-06-24 17:27:54 -0700 | [diff] [blame] | 540 | " has %s in unusual_devs.h (kernel" |
| 541 | " %s)\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | " Please send a copy of this message to " |
| 543 | "<linux-usb-devel@lists.sourceforge.net>\n", |
| 544 | le16_to_cpu(ddesc->idVendor), |
| 545 | le16_to_cpu(ddesc->idProduct), |
| 546 | le16_to_cpu(ddesc->bcdDevice), |
| 547 | idesc->bInterfaceSubClass, |
| 548 | idesc->bInterfaceProtocol, |
Phil Dibowitz | 5650b4d | 2006-06-24 17:27:54 -0700 | [diff] [blame] | 549 | msgs[msg], |
| 550 | UTS_RELEASE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | } |
Daniel Drake | 3c33242 | 2006-07-26 13:59:23 +0100 | [diff] [blame] | 552 | |
| 553 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | } |
| 555 | |
| 556 | /* Get the transport settings */ |
| 557 | static int get_transport(struct us_data *us) |
| 558 | { |
| 559 | switch (us->protocol) { |
| 560 | case US_PR_CB: |
| 561 | us->transport_name = "Control/Bulk"; |
| 562 | us->transport = usb_stor_CB_transport; |
| 563 | us->transport_reset = usb_stor_CB_reset; |
| 564 | us->max_lun = 7; |
| 565 | break; |
| 566 | |
| 567 | case US_PR_CBI: |
| 568 | us->transport_name = "Control/Bulk/Interrupt"; |
| 569 | us->transport = usb_stor_CBI_transport; |
| 570 | us->transport_reset = usb_stor_CB_reset; |
| 571 | us->max_lun = 7; |
| 572 | break; |
| 573 | |
| 574 | case US_PR_BULK: |
| 575 | us->transport_name = "Bulk"; |
| 576 | us->transport = usb_stor_Bulk_transport; |
| 577 | us->transport_reset = usb_stor_Bulk_reset; |
| 578 | break; |
| 579 | |
| 580 | #ifdef CONFIG_USB_STORAGE_USBAT |
Daniel Drake | b7b1e65 | 2005-09-30 12:49:36 +0100 | [diff] [blame] | 581 | case US_PR_USBAT: |
| 582 | us->transport_name = "Shuttle USBAT"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | us->transport = usbat_transport; |
| 584 | us->transport_reset = usb_stor_CB_reset; |
| 585 | us->max_lun = 1; |
| 586 | break; |
| 587 | #endif |
| 588 | |
| 589 | #ifdef CONFIG_USB_STORAGE_SDDR09 |
| 590 | case US_PR_EUSB_SDDR09: |
| 591 | us->transport_name = "EUSB/SDDR09"; |
| 592 | us->transport = sddr09_transport; |
| 593 | us->transport_reset = usb_stor_CB_reset; |
| 594 | us->max_lun = 0; |
| 595 | break; |
| 596 | #endif |
| 597 | |
| 598 | #ifdef CONFIG_USB_STORAGE_SDDR55 |
| 599 | case US_PR_SDDR55: |
| 600 | us->transport_name = "SDDR55"; |
| 601 | us->transport = sddr55_transport; |
| 602 | us->transport_reset = sddr55_reset; |
| 603 | us->max_lun = 0; |
| 604 | break; |
| 605 | #endif |
| 606 | |
| 607 | #ifdef CONFIG_USB_STORAGE_DPCM |
| 608 | case US_PR_DPCM_USB: |
| 609 | us->transport_name = "Control/Bulk-EUSB/SDDR09"; |
| 610 | us->transport = dpcm_transport; |
| 611 | us->transport_reset = usb_stor_CB_reset; |
| 612 | us->max_lun = 1; |
| 613 | break; |
| 614 | #endif |
| 615 | |
| 616 | #ifdef CONFIG_USB_STORAGE_FREECOM |
| 617 | case US_PR_FREECOM: |
| 618 | us->transport_name = "Freecom"; |
| 619 | us->transport = freecom_transport; |
| 620 | us->transport_reset = usb_stor_freecom_reset; |
| 621 | us->max_lun = 0; |
| 622 | break; |
| 623 | #endif |
| 624 | |
| 625 | #ifdef CONFIG_USB_STORAGE_DATAFAB |
| 626 | case US_PR_DATAFAB: |
| 627 | us->transport_name = "Datafab Bulk-Only"; |
| 628 | us->transport = datafab_transport; |
| 629 | us->transport_reset = usb_stor_Bulk_reset; |
| 630 | us->max_lun = 1; |
| 631 | break; |
| 632 | #endif |
| 633 | |
| 634 | #ifdef CONFIG_USB_STORAGE_JUMPSHOT |
| 635 | case US_PR_JUMPSHOT: |
| 636 | us->transport_name = "Lexar Jumpshot Control/Bulk"; |
| 637 | us->transport = jumpshot_transport; |
| 638 | us->transport_reset = usb_stor_Bulk_reset; |
| 639 | us->max_lun = 1; |
| 640 | break; |
| 641 | #endif |
| 642 | |
Daniel Drake | b383539 | 2006-05-09 01:45:27 +0100 | [diff] [blame] | 643 | #ifdef CONFIG_USB_STORAGE_ALAUDA |
| 644 | case US_PR_ALAUDA: |
| 645 | us->transport_name = "Alauda Control/Bulk"; |
| 646 | us->transport = alauda_transport; |
| 647 | us->transport_reset = usb_stor_Bulk_reset; |
| 648 | us->max_lun = 1; |
| 649 | break; |
| 650 | #endif |
| 651 | |
Matthew Dharm | dfe0d3b | 2006-08-13 17:30:14 -0700 | [diff] [blame] | 652 | #ifdef CONFIG_USB_STORAGE_KARMA |
| 653 | case US_PR_KARMA: |
| 654 | us->transport_name = "Rio Karma/Bulk"; |
| 655 | us->transport = rio_karma_transport; |
| 656 | us->transport_reset = usb_stor_Bulk_reset; |
| 657 | break; |
| 658 | #endif |
| 659 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | default: |
| 661 | return -EIO; |
| 662 | } |
| 663 | US_DEBUGP("Transport: %s\n", us->transport_name); |
| 664 | |
| 665 | /* fix for single-lun devices */ |
| 666 | if (us->flags & US_FL_SINGLE_LUN) |
| 667 | us->max_lun = 0; |
| 668 | return 0; |
| 669 | } |
| 670 | |
| 671 | /* Get the protocol settings */ |
| 672 | static int get_protocol(struct us_data *us) |
| 673 | { |
| 674 | switch (us->subclass) { |
| 675 | case US_SC_RBC: |
| 676 | us->protocol_name = "Reduced Block Commands (RBC)"; |
| 677 | us->proto_handler = usb_stor_transparent_scsi_command; |
| 678 | break; |
| 679 | |
| 680 | case US_SC_8020: |
| 681 | us->protocol_name = "8020i"; |
| 682 | us->proto_handler = usb_stor_ATAPI_command; |
| 683 | us->max_lun = 0; |
| 684 | break; |
| 685 | |
| 686 | case US_SC_QIC: |
| 687 | us->protocol_name = "QIC-157"; |
| 688 | us->proto_handler = usb_stor_qic157_command; |
| 689 | us->max_lun = 0; |
| 690 | break; |
| 691 | |
| 692 | case US_SC_8070: |
| 693 | us->protocol_name = "8070i"; |
| 694 | us->proto_handler = usb_stor_ATAPI_command; |
| 695 | us->max_lun = 0; |
| 696 | break; |
| 697 | |
| 698 | case US_SC_SCSI: |
| 699 | us->protocol_name = "Transparent SCSI"; |
| 700 | us->proto_handler = usb_stor_transparent_scsi_command; |
| 701 | break; |
| 702 | |
| 703 | case US_SC_UFI: |
| 704 | us->protocol_name = "Uniform Floppy Interface (UFI)"; |
| 705 | us->proto_handler = usb_stor_ufi_command; |
| 706 | break; |
| 707 | |
| 708 | #ifdef CONFIG_USB_STORAGE_ISD200 |
| 709 | case US_SC_ISD200: |
| 710 | us->protocol_name = "ISD200 ATA/ATAPI"; |
| 711 | us->proto_handler = isd200_ata_command; |
| 712 | break; |
| 713 | #endif |
| 714 | |
| 715 | default: |
| 716 | return -EIO; |
| 717 | } |
| 718 | US_DEBUGP("Protocol: %s\n", us->protocol_name); |
| 719 | return 0; |
| 720 | } |
| 721 | |
| 722 | /* Get the pipe settings */ |
| 723 | static int get_pipes(struct us_data *us) |
| 724 | { |
| 725 | struct usb_host_interface *altsetting = |
| 726 | us->pusb_intf->cur_altsetting; |
| 727 | int i; |
| 728 | struct usb_endpoint_descriptor *ep; |
| 729 | struct usb_endpoint_descriptor *ep_in = NULL; |
| 730 | struct usb_endpoint_descriptor *ep_out = NULL; |
| 731 | struct usb_endpoint_descriptor *ep_int = NULL; |
| 732 | |
| 733 | /* |
| 734 | * Find the endpoints we need. |
| 735 | * We are expecting a minimum of 2 endpoints - in and out (bulk). |
| 736 | * An optional interrupt is OK (necessary for CBI protocol). |
| 737 | * We will ignore any others. |
| 738 | */ |
| 739 | for (i = 0; i < altsetting->desc.bNumEndpoints; i++) { |
| 740 | ep = &altsetting->endpoint[i].desc; |
| 741 | |
| 742 | /* Is it a BULK endpoint? */ |
Luiz Fernando N. Capitulino | 0472074 | 2006-10-26 13:03:03 -0300 | [diff] [blame] | 743 | if (usb_endpoint_xfer_bulk(ep)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | /* BULK in or out? */ |
Luiz Fernando N. Capitulino | 0472074 | 2006-10-26 13:03:03 -0300 | [diff] [blame] | 745 | if (usb_endpoint_dir_in(ep)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | ep_in = ep; |
| 747 | else |
| 748 | ep_out = ep; |
| 749 | } |
| 750 | |
| 751 | /* Is it an interrupt endpoint? */ |
Luiz Fernando N. Capitulino | 0472074 | 2006-10-26 13:03:03 -0300 | [diff] [blame] | 752 | else if (usb_endpoint_xfer_int(ep)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | ep_int = ep; |
| 754 | } |
| 755 | } |
| 756 | |
| 757 | if (!ep_in || !ep_out || (us->protocol == US_PR_CBI && !ep_int)) { |
| 758 | US_DEBUGP("Endpoint sanity check failed! Rejecting dev.\n"); |
| 759 | return -EIO; |
| 760 | } |
| 761 | |
| 762 | /* Calculate and store the pipe values */ |
| 763 | us->send_ctrl_pipe = usb_sndctrlpipe(us->pusb_dev, 0); |
| 764 | us->recv_ctrl_pipe = usb_rcvctrlpipe(us->pusb_dev, 0); |
| 765 | us->send_bulk_pipe = usb_sndbulkpipe(us->pusb_dev, |
| 766 | ep_out->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); |
| 767 | us->recv_bulk_pipe = usb_rcvbulkpipe(us->pusb_dev, |
| 768 | ep_in->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); |
| 769 | if (ep_int) { |
| 770 | us->recv_intr_pipe = usb_rcvintpipe(us->pusb_dev, |
| 771 | ep_int->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK); |
| 772 | us->ep_bInterval = ep_int->bInterval; |
| 773 | } |
| 774 | return 0; |
| 775 | } |
| 776 | |
| 777 | /* Initialize all the dynamic resources we need */ |
| 778 | static int usb_stor_acquire_resources(struct us_data *us) |
| 779 | { |
| 780 | int p; |
Alan Stern | 3f13e66 | 2005-10-23 19:43:36 -0700 | [diff] [blame] | 781 | struct task_struct *th; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | |
| 783 | us->current_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 784 | if (!us->current_urb) { |
| 785 | US_DEBUGP("URB allocation failed\n"); |
| 786 | return -ENOMEM; |
| 787 | } |
| 788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | /* Just before we start our control thread, initialize |
| 790 | * the device if it needs initialization */ |
Alan Stern | b876aef | 2005-10-23 19:38:56 -0700 | [diff] [blame] | 791 | if (us->unusual_dev->initFunction) { |
| 792 | p = us->unusual_dev->initFunction(us); |
| 793 | if (p) |
| 794 | return p; |
| 795 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
| 797 | /* Start up our control thread */ |
Alan Stern | 3f13e66 | 2005-10-23 19:43:36 -0700 | [diff] [blame] | 798 | th = kthread_create(usb_stor_control_thread, us, "usb-storage"); |
| 799 | if (IS_ERR(th)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | printk(KERN_WARNING USB_STORAGE |
| 801 | "Unable to start control thread\n"); |
Alan Stern | 3f13e66 | 2005-10-23 19:43:36 -0700 | [diff] [blame] | 802 | return PTR_ERR(th); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
Alan Stern | 3f13e66 | 2005-10-23 19:43:36 -0700 | [diff] [blame] | 805 | /* Take a reference to the host for the control thread and |
| 806 | * count it among all the threads we have launched. Then |
| 807 | * start it up. */ |
| 808 | scsi_host_get(us_to_host(us)); |
| 809 | atomic_inc(&total_threads); |
| 810 | wake_up_process(th); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | |
| 812 | return 0; |
| 813 | } |
| 814 | |
| 815 | /* Release all our dynamic resources */ |
| 816 | static void usb_stor_release_resources(struct us_data *us) |
| 817 | { |
| 818 | US_DEBUGP("-- %s\n", __FUNCTION__); |
| 819 | |
| 820 | /* Tell the control thread to exit. The SCSI host must |
| 821 | * already have been removed so it won't try to queue |
| 822 | * any more commands. |
| 823 | */ |
| 824 | US_DEBUGP("-- sending exit command to thread\n"); |
Matthew Dharm | 77f4632 | 2005-07-28 14:44:29 -0700 | [diff] [blame] | 825 | set_bit(US_FLIDX_DISCONNECTING, &us->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | up(&us->sema); |
| 827 | |
| 828 | /* Call the destructor routine, if it exists */ |
| 829 | if (us->extra_destructor) { |
| 830 | US_DEBUGP("-- calling extra_destructor()\n"); |
| 831 | us->extra_destructor(us->extra); |
| 832 | } |
| 833 | |
| 834 | /* Free the extra data and the URB */ |
| 835 | kfree(us->extra); |
| 836 | usb_free_urb(us->current_urb); |
| 837 | } |
| 838 | |
| 839 | /* Dissociate from the USB device */ |
| 840 | static void dissociate_dev(struct us_data *us) |
| 841 | { |
| 842 | US_DEBUGP("-- %s\n", __FUNCTION__); |
| 843 | |
Alan Stern | bbafa46 | 2005-10-23 19:40:22 -0700 | [diff] [blame] | 844 | kfree(us->sensebuf); |
| 845 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | /* Free the device-related DMA-mapped buffers */ |
| 847 | if (us->cr) |
| 848 | usb_buffer_free(us->pusb_dev, sizeof(*us->cr), us->cr, |
| 849 | us->cr_dma); |
| 850 | if (us->iobuf) |
| 851 | usb_buffer_free(us->pusb_dev, US_IOBUF_SIZE, us->iobuf, |
| 852 | us->iobuf_dma); |
| 853 | |
| 854 | /* Remove our private data from the interface */ |
| 855 | usb_set_intfdata(us->pusb_intf, NULL); |
| 856 | } |
| 857 | |
Matthew Dharm | 77f4632 | 2005-07-28 14:44:29 -0700 | [diff] [blame] | 858 | /* First stage of disconnect processing: stop all commands and remove |
| 859 | * the host */ |
| 860 | static void quiesce_and_remove_host(struct us_data *us) |
| 861 | { |
Alan Stern | eecd11e | 2006-06-19 14:50:15 -0400 | [diff] [blame] | 862 | struct Scsi_Host *host = us_to_host(us); |
| 863 | |
Matthew Dharm | 77f4632 | 2005-07-28 14:44:29 -0700 | [diff] [blame] | 864 | /* Prevent new USB transfers, stop the current command, and |
| 865 | * interrupt a SCSI-scan or device-reset delay */ |
Alan Stern | eecd11e | 2006-06-19 14:50:15 -0400 | [diff] [blame] | 866 | scsi_lock(host); |
Matthew Dharm | 77f4632 | 2005-07-28 14:44:29 -0700 | [diff] [blame] | 867 | set_bit(US_FLIDX_DISCONNECTING, &us->flags); |
Alan Stern | eecd11e | 2006-06-19 14:50:15 -0400 | [diff] [blame] | 868 | scsi_unlock(host); |
Matthew Dharm | 77f4632 | 2005-07-28 14:44:29 -0700 | [diff] [blame] | 869 | usb_stor_stop_transport(us); |
| 870 | wake_up(&us->delay_wait); |
| 871 | |
| 872 | /* It doesn't matter if the SCSI-scanning thread is still running. |
| 873 | * The thread will exit when it sees the DISCONNECTING flag. */ |
| 874 | |
Matthew Dharm | 26186ba | 2005-07-28 14:45:50 -0700 | [diff] [blame] | 875 | /* queuecommand won't accept any new commands and the control |
| 876 | * thread won't execute a previously-queued command. If there |
| 877 | * is such a command pending, complete it with an error. */ |
Alan Stern | eecd11e | 2006-06-19 14:50:15 -0400 | [diff] [blame] | 878 | mutex_lock(&us->dev_mutex); |
Matthew Dharm | 26186ba | 2005-07-28 14:45:50 -0700 | [diff] [blame] | 879 | if (us->srb) { |
| 880 | us->srb->result = DID_NO_CONNECT << 16; |
Alan Stern | eecd11e | 2006-06-19 14:50:15 -0400 | [diff] [blame] | 881 | scsi_lock(host); |
Matthew Dharm | 26186ba | 2005-07-28 14:45:50 -0700 | [diff] [blame] | 882 | us->srb->scsi_done(us->srb); |
| 883 | us->srb = NULL; |
Alan Stern | eecd11e | 2006-06-19 14:50:15 -0400 | [diff] [blame] | 884 | scsi_unlock(host); |
Matthew Dharm | 26186ba | 2005-07-28 14:45:50 -0700 | [diff] [blame] | 885 | } |
Alan Stern | eecd11e | 2006-06-19 14:50:15 -0400 | [diff] [blame] | 886 | mutex_unlock(&us->dev_mutex); |
Matthew Dharm | 26186ba | 2005-07-28 14:45:50 -0700 | [diff] [blame] | 887 | |
| 888 | /* Now we own no commands so it's safe to remove the SCSI host */ |
Alan Stern | eecd11e | 2006-06-19 14:50:15 -0400 | [diff] [blame] | 889 | scsi_remove_host(host); |
Matthew Dharm | 77f4632 | 2005-07-28 14:44:29 -0700 | [diff] [blame] | 890 | } |
| 891 | |
| 892 | /* Second stage of disconnect processing: deallocate all resources */ |
| 893 | static void release_everything(struct us_data *us) |
| 894 | { |
| 895 | usb_stor_release_resources(us); |
| 896 | dissociate_dev(us); |
| 897 | |
| 898 | /* Drop our reference to the host; the SCSI core will free it |
| 899 | * (and "us" along with it) when the refcount becomes 0. */ |
| 900 | scsi_host_put(us_to_host(us)); |
| 901 | } |
| 902 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | /* Thread to carry out delayed SCSI-device scanning */ |
| 904 | static int usb_stor_scan_thread(void * __us) |
| 905 | { |
| 906 | struct us_data *us = (struct us_data *)__us; |
| 907 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | printk(KERN_DEBUG |
| 909 | "usb-storage: device found at %d\n", us->pusb_dev->devnum); |
| 910 | |
| 911 | /* Wait for the timeout to expire or for a disconnect */ |
| 912 | if (delay_use > 0) { |
| 913 | printk(KERN_DEBUG "usb-storage: waiting for device " |
| 914 | "to settle before scanning\n"); |
| 915 | retry: |
| 916 | wait_event_interruptible_timeout(us->delay_wait, |
| 917 | test_bit(US_FLIDX_DISCONNECTING, &us->flags), |
| 918 | delay_use * HZ); |
Christoph Lameter | 3e1d1d2 | 2005-06-24 23:13:50 -0700 | [diff] [blame] | 919 | if (try_to_freeze()) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | goto retry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | } |
| 922 | |
| 923 | /* If the device is still connected, perform the scanning */ |
| 924 | if (!test_bit(US_FLIDX_DISCONNECTING, &us->flags)) { |
Alan Stern | b876aef | 2005-10-23 19:38:56 -0700 | [diff] [blame] | 925 | |
| 926 | /* For bulk-only devices, determine the max LUN value */ |
| 927 | if (us->protocol == US_PR_BULK && |
| 928 | !(us->flags & US_FL_SINGLE_LUN)) { |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 929 | mutex_lock(&us->dev_mutex); |
Alan Stern | b876aef | 2005-10-23 19:38:56 -0700 | [diff] [blame] | 930 | us->max_lun = usb_stor_Bulk_max_lun(us); |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 931 | mutex_unlock(&us->dev_mutex); |
Alan Stern | b876aef | 2005-10-23 19:38:56 -0700 | [diff] [blame] | 932 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | scsi_scan_host(us_to_host(us)); |
| 934 | printk(KERN_DEBUG "usb-storage: device scan complete\n"); |
| 935 | |
| 936 | /* Should we unbind if no devices were detected? */ |
| 937 | } |
| 938 | |
| 939 | scsi_host_put(us_to_host(us)); |
| 940 | complete_and_exit(&threads_gone, 0); |
| 941 | } |
| 942 | |
| 943 | |
| 944 | /* Probe to see if we can drive a newly-connected USB device */ |
| 945 | static int storage_probe(struct usb_interface *intf, |
| 946 | const struct usb_device_id *id) |
| 947 | { |
| 948 | struct Scsi_Host *host; |
| 949 | struct us_data *us; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | int result; |
Alan Stern | 3f13e66 | 2005-10-23 19:43:36 -0700 | [diff] [blame] | 951 | struct task_struct *th; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 953 | if (usb_usual_check_type(id, USB_US_TYPE_STOR)) |
| 954 | return -ENXIO; |
| 955 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | US_DEBUGP("USB Mass Storage device detected\n"); |
| 957 | |
| 958 | /* |
| 959 | * Ask the SCSI layer to allocate a host structure, with extra |
| 960 | * space at the end for our private us_data structure. |
| 961 | */ |
| 962 | host = scsi_host_alloc(&usb_stor_host_template, sizeof(*us)); |
| 963 | if (!host) { |
| 964 | printk(KERN_WARNING USB_STORAGE |
| 965 | "Unable to allocate the scsi host\n"); |
| 966 | return -ENOMEM; |
| 967 | } |
| 968 | |
| 969 | us = host_to_us(host); |
| 970 | memset(us, 0, sizeof(struct us_data)); |
Arjan van de Ven | 4186ecf | 2006-01-11 15:55:29 +0100 | [diff] [blame] | 971 | mutex_init(&(us->dev_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | init_MUTEX_LOCKED(&(us->sema)); |
| 973 | init_completion(&(us->notify)); |
| 974 | init_waitqueue_head(&us->delay_wait); |
| 975 | |
| 976 | /* Associate the us_data structure with the USB device */ |
| 977 | result = associate_dev(us, intf); |
| 978 | if (result) |
| 979 | goto BadDevice; |
| 980 | |
| 981 | /* |
| 982 | * Get the unusual_devs entries and the descriptors |
| 983 | * |
| 984 | * id_index is calculated in the declaration to be the index number |
| 985 | * of the match from the usb_device_id table, so we can find the |
| 986 | * corresponding entry in the private table. |
| 987 | */ |
Daniel Drake | 3c33242 | 2006-07-26 13:59:23 +0100 | [diff] [blame] | 988 | result = get_device_info(us, id); |
| 989 | if (result) |
| 990 | goto BadDevice; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | /* Get the transport, protocol, and pipe settings */ |
| 993 | result = get_transport(us); |
| 994 | if (result) |
| 995 | goto BadDevice; |
| 996 | result = get_protocol(us); |
| 997 | if (result) |
| 998 | goto BadDevice; |
| 999 | result = get_pipes(us); |
| 1000 | if (result) |
| 1001 | goto BadDevice; |
| 1002 | |
| 1003 | /* Acquire all the other resources and add the host */ |
| 1004 | result = usb_stor_acquire_resources(us); |
| 1005 | if (result) |
| 1006 | goto BadDevice; |
| 1007 | result = scsi_add_host(host, &intf->dev); |
| 1008 | if (result) { |
| 1009 | printk(KERN_WARNING USB_STORAGE |
| 1010 | "Unable to add the scsi host\n"); |
| 1011 | goto BadDevice; |
| 1012 | } |
| 1013 | |
| 1014 | /* Start up the thread for delayed SCSI-device scanning */ |
Alan Stern | 3f13e66 | 2005-10-23 19:43:36 -0700 | [diff] [blame] | 1015 | th = kthread_create(usb_stor_scan_thread, us, "usb-stor-scan"); |
| 1016 | if (IS_ERR(th)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | printk(KERN_WARNING USB_STORAGE |
| 1018 | "Unable to start the device-scanning thread\n"); |
Matthew Dharm | 77f4632 | 2005-07-28 14:44:29 -0700 | [diff] [blame] | 1019 | quiesce_and_remove_host(us); |
Alan Stern | 3f13e66 | 2005-10-23 19:43:36 -0700 | [diff] [blame] | 1020 | result = PTR_ERR(th); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | goto BadDevice; |
| 1022 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | |
Alan Stern | 3f13e66 | 2005-10-23 19:43:36 -0700 | [diff] [blame] | 1024 | /* Take a reference to the host for the scanning thread and |
| 1025 | * count it among all the threads we have launched. Then |
| 1026 | * start it up. */ |
| 1027 | scsi_host_get(us_to_host(us)); |
| 1028 | atomic_inc(&total_threads); |
| 1029 | wake_up_process(th); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | |
| 1031 | return 0; |
| 1032 | |
| 1033 | /* We come here if there are any problems */ |
| 1034 | BadDevice: |
| 1035 | US_DEBUGP("storage_probe() failed\n"); |
Matthew Dharm | 77f4632 | 2005-07-28 14:44:29 -0700 | [diff] [blame] | 1036 | release_everything(us); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | return result; |
| 1038 | } |
| 1039 | |
| 1040 | /* Handle a disconnect event from the USB core */ |
| 1041 | static void storage_disconnect(struct usb_interface *intf) |
| 1042 | { |
| 1043 | struct us_data *us = usb_get_intfdata(intf); |
| 1044 | |
| 1045 | US_DEBUGP("storage_disconnect() called\n"); |
Matthew Dharm | 77f4632 | 2005-07-28 14:44:29 -0700 | [diff] [blame] | 1046 | quiesce_and_remove_host(us); |
| 1047 | release_everything(us); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | } |
| 1049 | |
| 1050 | /*********************************************************************** |
| 1051 | * Initialization and registration |
| 1052 | ***********************************************************************/ |
| 1053 | |
Alan Stern | ce2596d | 2005-10-23 19:41:39 -0700 | [diff] [blame] | 1054 | static struct usb_driver usb_storage_driver = { |
Alan Stern | ce2596d | 2005-10-23 19:41:39 -0700 | [diff] [blame] | 1055 | .name = "usb-storage", |
| 1056 | .probe = storage_probe, |
| 1057 | .disconnect = storage_disconnect, |
| 1058 | #ifdef CONFIG_PM |
| 1059 | .suspend = storage_suspend, |
| 1060 | .resume = storage_resume, |
| 1061 | #endif |
Alan Stern | 47104b0 | 2006-06-01 13:52:56 -0400 | [diff] [blame] | 1062 | .pre_reset = storage_pre_reset, |
| 1063 | .post_reset = storage_post_reset, |
Alan Stern | ce2596d | 2005-10-23 19:41:39 -0700 | [diff] [blame] | 1064 | .id_table = storage_usb_ids, |
| 1065 | }; |
| 1066 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | static int __init usb_stor_init(void) |
| 1068 | { |
| 1069 | int retval; |
| 1070 | printk(KERN_INFO "Initializing USB Mass Storage driver...\n"); |
| 1071 | |
| 1072 | /* register the driver, return usb_register return code if error */ |
| 1073 | retval = usb_register(&usb_storage_driver); |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 1074 | if (retval == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | printk(KERN_INFO "USB Mass Storage support registered.\n"); |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 1076 | usb_usual_set_present(USB_US_TYPE_STOR); |
| 1077 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | return retval; |
| 1079 | } |
| 1080 | |
| 1081 | static void __exit usb_stor_exit(void) |
| 1082 | { |
| 1083 | US_DEBUGP("usb_stor_exit() called\n"); |
| 1084 | |
| 1085 | /* Deregister the driver |
| 1086 | * This will cause disconnect() to be called for each |
| 1087 | * attached unit |
| 1088 | */ |
| 1089 | US_DEBUGP("-- calling usb_deregister()\n"); |
| 1090 | usb_deregister(&usb_storage_driver) ; |
| 1091 | |
| 1092 | /* Don't return until all of our control and scanning threads |
| 1093 | * have exited. Since each thread signals threads_gone as its |
| 1094 | * last act, we have to call wait_for_completion the right number |
| 1095 | * of times. |
| 1096 | */ |
| 1097 | while (atomic_read(&total_threads) > 0) { |
| 1098 | wait_for_completion(&threads_gone); |
| 1099 | atomic_dec(&total_threads); |
| 1100 | } |
Pete Zaitcev | a00828e | 2005-10-22 20:15:09 -0700 | [diff] [blame] | 1101 | |
| 1102 | usb_usual_clear_present(USB_US_TYPE_STOR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | } |
| 1104 | |
| 1105 | module_init(usb_stor_init); |
| 1106 | module_exit(usb_stor_exit); |