Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the libpayload project. |
| 3 | * |
| 4 | * Copyright (C) 2008 coresystems GmbH |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | */ |
| 29 | |
Stefan Reinauer | 8992e53 | 2013-05-02 16:16:41 -0700 | [diff] [blame] | 30 | //#define USB_DEBUG |
Gabe Black | 0af03d2 | 2012-03-19 03:06:46 -0700 | [diff] [blame] | 31 | #include <endian.h> |
Jordan Crouse | 29061a5 | 2008-09-11 17:29:00 +0000 | [diff] [blame] | 32 | #include <usb/usb.h> |
| 33 | #include <usb/usbmsc.h> |
| 34 | #include <usb/usbdisk.h> |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 35 | |
| 36 | enum { |
| 37 | msc_subclass_rbc = 0x1, |
| 38 | msc_subclass_mmc2 = 0x2, |
| 39 | msc_subclass_qic157 = 0x3, |
| 40 | msc_subclass_ufi = 0x4, |
| 41 | msc_subclass_sff8070i = 0x5, |
| 42 | msc_subclass_scsitrans = 0x6 |
| 43 | }; |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 44 | |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 45 | static const char *msc_subclass_strings[7] = { |
| 46 | "(none)", |
| 47 | "RBC", |
| 48 | "MMC-2", |
| 49 | "QIC-157", |
| 50 | "UFI", |
| 51 | "SFF-8070i", |
| 52 | "SCSI transparent" |
| 53 | }; |
| 54 | enum { |
| 55 | msc_proto_cbi_wcomp = 0x0, |
| 56 | msc_proto_cbi_wocomp = 0x1, |
| 57 | msc_proto_bulk_only = 0x50 |
| 58 | }; |
| 59 | static const char *msc_protocol_strings[0x51] = { |
| 60 | "Control/Bulk/Interrupt protocol (with command completion interrupt)", |
| 61 | "Control/Bulk/Interrupt protocol (with no command completion interrupt)", |
| 62 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 63 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 64 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 65 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 66 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 67 | "Bulk-Only Transport" |
| 68 | }; |
| 69 | |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 70 | static void |
| 71 | usb_msc_create_disk (usbdev_t *dev) |
| 72 | { |
| 73 | if (usbdisk_create) { |
| 74 | usbdisk_create (dev); |
| 75 | MSC_INST (dev)->usbdisk_created = 1; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | static void |
| 80 | usb_msc_remove_disk (usbdev_t *dev) |
| 81 | { |
| 82 | if (MSC_INST (dev)->usbdisk_created && usbdisk_remove) |
| 83 | usbdisk_remove (dev); |
| 84 | } |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 85 | |
| 86 | static void |
| 87 | usb_msc_destroy (usbdev_t *dev) |
| 88 | { |
Nico Huber | 445a3a0 | 2012-06-21 10:52:49 +0200 | [diff] [blame] | 89 | if (dev->data) { |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 90 | usb_msc_remove_disk (dev); |
Nico Huber | 445a3a0 | 2012-06-21 10:52:49 +0200 | [diff] [blame] | 91 | free (dev->data); |
| 92 | } |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 93 | dev->data = 0; |
| 94 | } |
| 95 | |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 96 | const int DEV_RESET = 0xff; |
| 97 | const int GET_MAX_LUN = 0xfe; |
Duncan Laurie | 3a65d85 | 2013-09-12 13:27:15 -0700 | [diff] [blame] | 98 | /* Many USB3 devices do not work with large transfer requests. |
| 99 | * Limit the request size to 64KB chunks to ensure maximum compatibility. */ |
| 100 | const int MAX_CHUNK_BYTES = 1024 * 64; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 101 | |
| 102 | const unsigned int cbw_signature = 0x43425355; |
| 103 | const unsigned int csw_signature = 0x53425355; |
| 104 | |
| 105 | typedef struct { |
| 106 | unsigned int dCBWSignature; |
| 107 | unsigned int dCBWTag; |
| 108 | unsigned int dCBWDataTransferLength; |
| 109 | unsigned char bmCBWFlags; |
| 110 | unsigned long bCBWLUN:4; |
| 111 | unsigned long:4; |
| 112 | unsigned long bCBWCBLength:5; |
| 113 | unsigned long:3; |
| 114 | unsigned char CBWCB[31 - 15]; |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 115 | } __attribute__ ((packed)) cbw_t; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 116 | |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 117 | typedef struct { |
| 118 | unsigned int dCSWSignature; |
| 119 | unsigned int dCSWTag; |
| 120 | unsigned int dCSWDataResidue; |
| 121 | unsigned char bCSWStatus; |
| 122 | } __attribute__ ((packed)) csw_t; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 123 | |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 124 | enum { |
| 125 | /* |
| 126 | * MSC commands can be |
| 127 | * successful, |
| 128 | * fail with proper response or |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 129 | * fail totally, which results in detaching of the usb device |
| 130 | * and immediate cleanup of the usbdev_t structure. |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 131 | * In the latter case the caller has to make sure, that he won't |
| 132 | * use the device any more. |
| 133 | */ |
| 134 | MSC_COMMAND_OK = 0, MSC_COMMAND_FAIL, MSC_COMMAND_DETACHED |
| 135 | }; |
| 136 | |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 137 | static int |
| 138 | request_sense (usbdev_t *dev); |
Aaron Durbin | a967f41 | 2013-06-06 16:14:21 -0500 | [diff] [blame] | 139 | static int |
| 140 | request_sense_no_media (usbdev_t *dev); |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 141 | static void |
| 142 | usb_msc_poll (usbdev_t *dev); |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 143 | |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 144 | static int |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 145 | reset_transport (usbdev_t *dev) |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 146 | { |
| 147 | dev_req_t dr; |
| 148 | memset (&dr, 0, sizeof (dr)); |
| 149 | dr.bmRequestType = 0; |
| 150 | dr.data_dir = host_to_device; |
| 151 | #ifndef QEMU |
| 152 | dr.req_type = class_type; |
| 153 | dr.req_recp = iface_recp; |
| 154 | #endif |
| 155 | dr.bRequest = DEV_RESET; |
| 156 | dr.wValue = 0; |
| 157 | dr.wIndex = 0; |
| 158 | dr.wLength = 0; |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 159 | |
| 160 | /* if any of these fails, detach device, as we are lost */ |
Julius Werner | e9738db | 2013-02-21 13:41:40 -0800 | [diff] [blame] | 161 | if (dev->controller->control (dev, OUT, sizeof (dr), &dr, 0, 0) < 0 || |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 162 | clear_stall (MSC_INST (dev)->bulk_in) || |
| 163 | clear_stall (MSC_INST (dev)->bulk_out)) { |
Dave Frodin | 6bf11cf | 2012-12-11 13:08:07 -0700 | [diff] [blame] | 164 | usb_debug ("Detaching unresponsive device.\n"); |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 165 | usb_detach_device (dev->controller, dev->address); |
| 166 | return MSC_COMMAND_DETACHED; |
| 167 | } |
| 168 | /* return fail as we are only called in case of failure */ |
| 169 | return MSC_COMMAND_FAIL; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | /* device may stall this command, so beware! */ |
| 173 | static int |
| 174 | get_max_luns (usbdev_t *dev) |
| 175 | { |
| 176 | unsigned char luns = 75; |
| 177 | dev_req_t dr; |
| 178 | dr.bmRequestType = 0; |
| 179 | dr.data_dir = device_to_host; |
| 180 | #ifndef QEMU |
| 181 | dr.req_type = class_type; |
| 182 | dr.req_recp = iface_recp; |
| 183 | #endif |
| 184 | dr.bRequest = GET_MAX_LUN; |
| 185 | dr.wValue = 0; |
| 186 | dr.wIndex = 0; |
| 187 | dr.wLength = 1; |
Julius Werner | e9738db | 2013-02-21 13:41:40 -0800 | [diff] [blame] | 188 | if (dev->controller->control (dev, IN, sizeof (dr), &dr, 1, &luns) < 0) |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 189 | luns = 0; // assume only 1 lun if req fails |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 190 | return luns; |
| 191 | } |
| 192 | |
Nico Huber | 43b9f32 | 2012-05-21 14:05:41 +0200 | [diff] [blame] | 193 | unsigned int tag; |
| 194 | unsigned char lun = 0; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 195 | |
| 196 | static void |
| 197 | wrap_cbw (cbw_t *cbw, int datalen, cbw_direction dir, const u8 *cmd, |
| 198 | int cmdlen) |
| 199 | { |
| 200 | memset (cbw, 0, sizeof (cbw_t)); |
| 201 | |
| 202 | cbw->dCBWSignature = cbw_signature; |
Nico Huber | 43b9f32 | 2012-05-21 14:05:41 +0200 | [diff] [blame] | 203 | cbw->dCBWTag = ++tag; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 204 | cbw->bCBWLUN = lun; // static value per device |
| 205 | |
| 206 | cbw->dCBWDataTransferLength = datalen; |
| 207 | cbw->bmCBWFlags = dir; |
| 208 | memcpy (cbw->CBWCB, cmd, sizeof (cbw->CBWCB)); |
| 209 | cbw->bCBWCBLength = cmdlen; |
| 210 | } |
| 211 | |
Nico Huber | 43b9f32 | 2012-05-21 14:05:41 +0200 | [diff] [blame] | 212 | static int |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 213 | get_csw (endpoint_t *ep, csw_t *csw) |
| 214 | { |
Julius Werner | e9738db | 2013-02-21 13:41:40 -0800 | [diff] [blame] | 215 | if (ep->dev->controller->bulk (ep, sizeof (csw_t), (u8 *) csw, 1) < 0) { |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 216 | clear_stall (ep); |
Nico Huber | 43b9f32 | 2012-05-21 14:05:41 +0200 | [diff] [blame] | 217 | if (ep->dev->controller->bulk |
Julius Werner | e9738db | 2013-02-21 13:41:40 -0800 | [diff] [blame] | 218 | (ep, sizeof (csw_t), (u8 *) csw, 1) < 0) { |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 219 | return reset_transport (ep->dev); |
Nico Huber | 43b9f32 | 2012-05-21 14:05:41 +0200 | [diff] [blame] | 220 | } |
| 221 | } |
| 222 | if (csw->dCSWTag != tag) { |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 223 | return reset_transport (ep->dev); |
Nico Huber | 43b9f32 | 2012-05-21 14:05:41 +0200 | [diff] [blame] | 224 | } |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 225 | return MSC_COMMAND_OK; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 226 | } |
| 227 | |
| 228 | static int |
| 229 | execute_command (usbdev_t *dev, cbw_direction dir, const u8 *cb, int cblen, |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 230 | u8 *buf, int buflen, int residue_ok) |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 231 | { |
| 232 | cbw_t cbw; |
| 233 | csw_t csw; |
| 234 | |
| 235 | int always_succeed = 0; |
| 236 | if ((cb[0] == 0x1b) && (cb[4] == 1)) { //start command, always succeed |
| 237 | always_succeed = 1; |
| 238 | } |
| 239 | wrap_cbw (&cbw, buflen, dir, cb, cblen); |
| 240 | if (dev->controller-> |
Julius Werner | e9738db | 2013-02-21 13:41:40 -0800 | [diff] [blame] | 241 | bulk (MSC_INST (dev)->bulk_out, sizeof (cbw), (u8 *) &cbw, 0) < 0) { |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 242 | return reset_transport (dev); |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 243 | } |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 244 | if (buflen > 0) { |
| 245 | if (dir == cbw_direction_data_in) { |
| 246 | if (dev->controller-> |
Julius Werner | e9738db | 2013-02-21 13:41:40 -0800 | [diff] [blame] | 247 | bulk (MSC_INST (dev)->bulk_in, buflen, buf, 0) < 0) |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 248 | clear_stall (MSC_INST (dev)->bulk_in); |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 249 | } else { |
| 250 | if (dev->controller-> |
Julius Werner | e9738db | 2013-02-21 13:41:40 -0800 | [diff] [blame] | 251 | bulk (MSC_INST (dev)->bulk_out, buflen, buf, 0) < 0) |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 252 | clear_stall (MSC_INST (dev)->bulk_out); |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 253 | } |
| 254 | } |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 255 | int ret = get_csw (MSC_INST (dev)->bulk_in, &csw); |
| 256 | if (ret) { |
| 257 | return ret; |
| 258 | } else if (always_succeed == 1) { |
| 259 | /* return success, regardless of message */ |
| 260 | return MSC_COMMAND_OK; |
| 261 | } else if (csw.bCSWStatus == 2) { |
| 262 | /* phase error, reset transport */ |
| 263 | return reset_transport (dev); |
| 264 | } else if (csw.bCSWStatus == 0) { |
| 265 | if ((csw.dCSWDataResidue == 0) || residue_ok) |
| 266 | /* no error, exit */ |
| 267 | return MSC_COMMAND_OK; |
| 268 | else |
| 269 | /* missed some bytes */ |
| 270 | return MSC_COMMAND_FAIL; |
| 271 | } else { |
| 272 | if (cb[0] == 0x03) |
| 273 | /* requesting sense failed, that's bad */ |
| 274 | return MSC_COMMAND_FAIL; |
Aaron Durbin | a967f41 | 2013-06-06 16:14:21 -0500 | [diff] [blame] | 275 | else if (cb[0] == 0) |
| 276 | /* If command was TEST UNIT READY determine if the |
| 277 | * device is of removable type indicating no media |
| 278 | * found. */ |
| 279 | return request_sense_no_media (dev); |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 280 | /* error "check condition" or reserved error */ |
| 281 | ret = request_sense (dev); |
| 282 | /* return fail or the status of request_sense if it's worse */ |
| 283 | return ret ? ret : MSC_COMMAND_FAIL; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 284 | } |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 285 | } |
| 286 | |
| 287 | typedef struct { |
| 288 | unsigned char command; //0 |
| 289 | unsigned char res1; //1 |
| 290 | unsigned int block; //2-5 |
| 291 | unsigned char res2; //6 |
| 292 | unsigned short numblocks; //7-8 |
| 293 | unsigned char res3; //9 - the block is 10 bytes long |
| 294 | } __attribute__ ((packed)) cmdblock_t; |
| 295 | |
| 296 | typedef struct { |
| 297 | unsigned char command; //0 |
| 298 | unsigned char res1; //1 |
| 299 | unsigned char res2; //2 |
| 300 | unsigned char res3; //3 |
| 301 | unsigned char lun; //4 |
| 302 | unsigned char res4; //5 |
| 303 | } __attribute__ ((packed)) cmdblock6_t; |
| 304 | |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 305 | /** |
| 306 | * Like readwrite_blocks, but for soft-sectors of 512b size. Converts the |
| 307 | * start and count from 512b units. |
| 308 | * Start and count must be aligned so that they match the native |
| 309 | * sector size. |
| 310 | * |
| 311 | * @param dev device to access |
| 312 | * @param start first sector to access |
| 313 | * @param n number of sectors to access |
| 314 | * @param dir direction of access: cbw_direction_data_in == read, cbw_direction_data_out == write |
| 315 | * @param buf buffer to read into or write from. Must be at least n*512 bytes |
| 316 | * @return 0 on success, 1 on failure |
| 317 | */ |
| 318 | int |
| 319 | readwrite_blocks_512 (usbdev_t *dev, int start, int n, |
| 320 | cbw_direction dir, u8 *buf) |
| 321 | { |
| 322 | int blocksize_divider = MSC_INST(dev)->blocksize / 512; |
| 323 | return readwrite_blocks (dev, start / blocksize_divider, |
| 324 | n / blocksize_divider, dir, buf); |
| 325 | } |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 326 | |
| 327 | /** |
| 328 | * Reads or writes a number of sequential blocks on a USB storage device. |
| 329 | * As it uses the READ(10) SCSI-2 command, it's limited to storage devices |
| 330 | * of at most 2TB. It assumes sectors of 512 bytes. |
| 331 | * |
| 332 | * @param dev device to access |
| 333 | * @param start first sector to access |
| 334 | * @param n number of sectors to access |
| 335 | * @param dir direction of access: cbw_direction_data_in == read, cbw_direction_data_out == write |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 336 | * @param buf buffer to read into or write from. Must be at least n*sectorsize bytes |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 337 | * @return 0 on success, 1 on failure |
| 338 | */ |
Gabe Black | e8eb86f | 2013-09-18 05:37:20 -0700 | [diff] [blame] | 339 | static int |
Duncan Laurie | 3a65d85 | 2013-09-12 13:27:15 -0700 | [diff] [blame] | 340 | readwrite_chunk (usbdev_t *dev, int start, int n, cbw_direction dir, u8 *buf) |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 341 | { |
| 342 | cmdblock_t cb; |
| 343 | memset (&cb, 0, sizeof (cb)); |
| 344 | if (dir == cbw_direction_data_in) { |
| 345 | // read |
| 346 | cb.command = 0x28; |
| 347 | } else { |
| 348 | // write |
| 349 | cb.command = 0x2a; |
| 350 | } |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 351 | cb.block = htonl (start); |
| 352 | cb.numblocks = htonw (n); |
Stefan Reinauer | 14e2277 | 2010-04-27 06:56:47 +0000 | [diff] [blame] | 353 | |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 354 | return execute_command (dev, dir, (u8 *) &cb, sizeof (cb), buf, |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 355 | n * MSC_INST(dev)->blocksize, 0) |
| 356 | != MSC_COMMAND_OK ? 1 : 0; |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 357 | } |
| 358 | |
Duncan Laurie | 3a65d85 | 2013-09-12 13:27:15 -0700 | [diff] [blame] | 359 | /** |
| 360 | * Reads or writes a number of sequential blocks on a USB storage device |
| 361 | * that is split into MAX_CHUNK_BYTES size requests. |
| 362 | * |
| 363 | * As it uses the READ(10) SCSI-2 command, it's limited to storage devices |
| 364 | * of at most 2TB. It assumes sectors of 512 bytes. |
| 365 | * |
| 366 | * @param dev device to access |
| 367 | * @param start first sector to access |
| 368 | * @param n number of sectors to access |
| 369 | * @param dir direction of access: cbw_direction_data_in == read, |
| 370 | * cbw_direction_data_out == write |
| 371 | * @param buf buffer to read into or write from. |
| 372 | * Must be at least n*sectorsize bytes |
| 373 | * @return 0 on success, 1 on failure |
| 374 | */ |
| 375 | int |
| 376 | readwrite_blocks (usbdev_t *dev, int start, int n, cbw_direction dir, u8 *buf) |
| 377 | { |
| 378 | int chunk_size = MAX_CHUNK_BYTES / MSC_INST(dev)->blocksize; |
| 379 | int chunk; |
| 380 | |
| 381 | /* Read as many full chunks as needed. */ |
| 382 | for (chunk = 0; chunk < (n / chunk_size); chunk++) { |
| 383 | if (readwrite_chunk (dev, start + (chunk * chunk_size), |
| 384 | chunk_size, dir, |
| 385 | buf + (chunk * MAX_CHUNK_BYTES)) |
| 386 | != MSC_COMMAND_OK) |
| 387 | return 1; |
| 388 | } |
| 389 | |
| 390 | /* Read any remaining partial chunk at the end. */ |
| 391 | if (n % chunk_size) { |
| 392 | if (readwrite_chunk (dev, start + (chunk * chunk_size), |
| 393 | n % chunk_size, dir, |
| 394 | buf + (chunk * MAX_CHUNK_BYTES)) |
| 395 | != MSC_COMMAND_OK) |
| 396 | return 1; |
| 397 | } |
| 398 | |
| 399 | return 0; |
| 400 | } |
| 401 | |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 402 | /* Only request it, we don't interpret it. |
| 403 | On certain errors, that's necessary to get devices out of |
| 404 | a special state called "Contingent Allegiance Condition" */ |
| 405 | static int |
| 406 | request_sense (usbdev_t *dev) |
| 407 | { |
| 408 | u8 buf[19]; |
| 409 | cmdblock6_t cb; |
| 410 | memset (&cb, 0, sizeof (cb)); |
| 411 | cb.command = 0x3; |
Stefan Reinauer | 14e2277 | 2010-04-27 06:56:47 +0000 | [diff] [blame] | 412 | |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 413 | return execute_command (dev, cbw_direction_data_in, (u8 *) &cb, |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 414 | sizeof (cb), buf, 19, 1); |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 415 | } |
| 416 | |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 417 | static int request_sense_no_media (usbdev_t *dev) |
Aaron Durbin | a967f41 | 2013-06-06 16:14:21 -0500 | [diff] [blame] | 418 | { |
| 419 | u8 buf[19]; |
| 420 | int ret; |
| 421 | cmdblock6_t cb; |
| 422 | memset (&cb, 0, sizeof (cb)); |
| 423 | cb.command = 0x3; |
| 424 | |
| 425 | ret = execute_command (dev, cbw_direction_data_in, (u8 *) &cb, |
| 426 | sizeof (cb), buf, 19, 1); |
| 427 | |
| 428 | if (ret) |
| 429 | return ret; |
| 430 | |
| 431 | /* Check if sense key is set to NOT READY. */ |
| 432 | if ((buf[2] & 0xf) != 2) |
| 433 | return MSC_COMMAND_FAIL; |
| 434 | |
| 435 | /* Check if additional sense code is 0x3a. */ |
| 436 | if (buf[12] != 0x3a) |
| 437 | return MSC_COMMAND_FAIL; |
| 438 | |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 439 | /* No media is present. Return MSC_COMMAND_OK while marking the disk |
| 440 | * not ready. */ |
| 441 | usb_debug ("Empty media found.\n"); |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 442 | MSC_INST (dev)->ready = USB_MSC_NOT_READY; |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 443 | return MSC_COMMAND_OK; |
Aaron Durbin | a967f41 | 2013-06-06 16:14:21 -0500 | [diff] [blame] | 444 | } |
| 445 | |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 446 | static int |
| 447 | test_unit_ready (usbdev_t *dev) |
| 448 | { |
| 449 | cmdblock6_t cb; |
| 450 | memset (&cb, 0, sizeof (cb)); // full initialization for T-U-R |
| 451 | return execute_command (dev, cbw_direction_data_out, (u8 *) &cb, |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 452 | sizeof (cb), 0, 0, 0); |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 453 | } |
| 454 | |
| 455 | static int |
| 456 | spin_up (usbdev_t *dev) |
| 457 | { |
| 458 | cmdblock6_t cb; |
| 459 | memset (&cb, 0, sizeof (cb)); |
| 460 | cb.command = 0x1b; |
| 461 | cb.lun = 1; |
| 462 | return execute_command (dev, cbw_direction_data_out, (u8 *) &cb, |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 463 | sizeof (cb), 0, 0, 0); |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 464 | } |
| 465 | |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 466 | static int |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 467 | read_capacity (usbdev_t *dev) |
| 468 | { |
| 469 | cmdblock_t cb; |
| 470 | memset (&cb, 0, sizeof (cb)); |
| 471 | cb.command = 0x25; // read capacity |
Gabe Black | 2c2c4fa | 2013-01-15 16:22:04 -0800 | [diff] [blame] | 472 | u32 buf[2]; |
Stefan Reinauer | d233f36 | 2009-04-30 16:46:12 +0000 | [diff] [blame] | 473 | |
Gabe Black | 93ded59 | 2012-11-01 15:44:10 -0700 | [diff] [blame] | 474 | usb_debug ("Reading capacity of mass storage device.\n"); |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 475 | int count = 0, ret; |
| 476 | while (count++ < 20) { |
| 477 | switch (ret = execute_command |
| 478 | (dev, cbw_direction_data_in, (u8 *) &cb, |
Gabe Black | 2c2c4fa | 2013-01-15 16:22:04 -0800 | [diff] [blame] | 479 | sizeof (cb), (u8 *)buf, 8, 0)) { |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 480 | case MSC_COMMAND_OK: |
| 481 | break; |
| 482 | case MSC_COMMAND_FAIL: |
| 483 | continue; |
| 484 | default: /* if it's worse return */ |
| 485 | return ret; |
| 486 | } |
| 487 | break; |
| 488 | } |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 489 | if (count >= 20) { |
Stefan Reinauer | d233f36 | 2009-04-30 16:46:12 +0000 | [diff] [blame] | 490 | // still not successful, assume 2tb in 512byte sectors, which is just the same garbage as any other number, but probably more usable. |
Dave Frodin | 6bf11cf | 2012-12-11 13:08:07 -0700 | [diff] [blame] | 491 | usb_debug (" assuming 2 TB with 512-byte sectors as READ CAPACITY didn't answer.\n"); |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 492 | MSC_INST (dev)->numblocks = 0xffffffff; |
| 493 | MSC_INST (dev)->blocksize = 512; |
| 494 | } else { |
Gabe Black | 2c2c4fa | 2013-01-15 16:22:04 -0800 | [diff] [blame] | 495 | MSC_INST (dev)->numblocks = ntohl(buf[0]) + 1; |
| 496 | MSC_INST (dev)->blocksize = ntohl(buf[1]); |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 497 | } |
Dave Frodin | 6bf11cf | 2012-12-11 13:08:07 -0700 | [diff] [blame] | 498 | usb_debug (" %d %d-byte sectors (%d MB)\n", MSC_INST (dev)->numblocks, |
Mathias Krause | c4716b4 | 2011-06-08 15:36:55 +0200 | [diff] [blame] | 499 | MSC_INST (dev)->blocksize, |
Nico Huber | c43e736 | 2012-05-21 13:59:43 +0200 | [diff] [blame] | 500 | /* round down high block counts to avoid integer overflow */ |
| 501 | MSC_INST (dev)->numblocks > 1000000 |
| 502 | ? (MSC_INST (dev)->numblocks / 1000) * MSC_INST (dev)->blocksize / 1000 : |
Mathias Krause | c4716b4 | 2011-06-08 15:36:55 +0200 | [diff] [blame] | 503 | MSC_INST (dev)->numblocks * MSC_INST (dev)->blocksize / 1000 / 1000); |
Nico Huber | 79e1f2f | 2012-06-01 09:50:11 +0200 | [diff] [blame] | 504 | return MSC_COMMAND_OK; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 505 | } |
| 506 | |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 507 | static int |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 508 | usb_msc_test_unit_ready (usbdev_t *dev) |
| 509 | { |
| 510 | int i; |
Shawn Nematbakhsh | 7ecc912 | 2013-09-12 18:09:39 -0700 | [diff] [blame] | 511 | time_t start_time_secs; |
| 512 | struct timeval tv; |
Shawn Nematbakhsh | df6d09d | 2013-09-12 18:23:09 -0700 | [diff] [blame] | 513 | /* SCSI/ATA specs say we have to wait up to 30s, but most devices |
| 514 | * are ready much sooner. Use a 5 sec timeout to better accomodate |
| 515 | * devices which fail to respond. */ |
| 516 | const int timeout_secs = 5; |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 517 | |
| 518 | usb_debug (" Waiting for device to become ready..."); |
| 519 | |
| 520 | /* Initially mark the device ready. */ |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 521 | MSC_INST (dev)->ready = USB_MSC_READY; |
Shawn Nematbakhsh | 7ecc912 | 2013-09-12 18:09:39 -0700 | [diff] [blame] | 522 | gettimeofday (&tv, NULL); |
| 523 | start_time_secs = tv.tv_sec; |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 524 | |
Shawn Nematbakhsh | 7ecc912 | 2013-09-12 18:09:39 -0700 | [diff] [blame] | 525 | while (tv.tv_sec - start_time_secs < timeout_secs) { |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 526 | switch (test_unit_ready (dev)) { |
| 527 | case MSC_COMMAND_OK: |
| 528 | break; |
| 529 | case MSC_COMMAND_FAIL: |
| 530 | mdelay (100); |
Shawn Nematbakhsh | 7ecc912 | 2013-09-12 18:09:39 -0700 | [diff] [blame] | 531 | usb_debug ("."); |
| 532 | gettimeofday (&tv, NULL); |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 533 | continue; |
| 534 | default: |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 535 | /* Device detached, return immediately */ |
| 536 | return USB_MSC_DETACHED; |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 537 | } |
| 538 | break; |
| 539 | } |
Shawn Nematbakhsh | 7ecc912 | 2013-09-12 18:09:39 -0700 | [diff] [blame] | 540 | if (!(tv.tv_sec - start_time_secs < timeout_secs)) { |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 541 | usb_debug ("timeout. Device not ready.\n"); |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 542 | MSC_INST (dev)->ready = USB_MSC_NOT_READY; |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | /* Don't bother spinning up the stroage device if the device is not |
| 546 | * ready. This can happen when empty card readers are present. |
| 547 | * Polling will pick it back up if readiness changes. */ |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 548 | if (!MSC_INST (dev)->ready) |
| 549 | return MSC_INST (dev)->ready; |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 550 | |
| 551 | usb_debug ("ok.\n"); |
| 552 | |
| 553 | usb_debug (" spin up"); |
| 554 | for (i = 0; i < 30; i++) { |
| 555 | usb_debug ("."); |
| 556 | switch (spin_up (dev)) { |
| 557 | case MSC_COMMAND_OK: |
| 558 | usb_debug (" OK."); |
| 559 | break; |
| 560 | case MSC_COMMAND_FAIL: |
| 561 | mdelay (100); |
| 562 | continue; |
| 563 | default: |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 564 | /* Device detached, return immediately */ |
| 565 | return USB_MSC_DETACHED; |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 566 | } |
| 567 | break; |
| 568 | } |
| 569 | usb_debug ("\n"); |
| 570 | |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 571 | if (read_capacity (dev) == MSC_COMMAND_DETACHED) |
| 572 | return USB_MSC_DETACHED; |
| 573 | |
| 574 | return MSC_INST (dev)->ready; |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 575 | } |
| 576 | |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 577 | void |
| 578 | usb_msc_init (usbdev_t *dev) |
| 579 | { |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 580 | int i; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 581 | |
Nico Huber | 445a3a0 | 2012-06-21 10:52:49 +0200 | [diff] [blame] | 582 | /* init .data before setting .destroy */ |
| 583 | dev->data = NULL; |
| 584 | |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 585 | dev->destroy = usb_msc_destroy; |
| 586 | dev->poll = usb_msc_poll; |
| 587 | |
| 588 | configuration_descriptor_t *cd = |
| 589 | (configuration_descriptor_t *) dev->configuration; |
| 590 | interface_descriptor_t *interface = |
| 591 | (interface_descriptor_t *) (((char *) cd) + cd->bLength); |
| 592 | |
Gabe Black | 93ded59 | 2012-11-01 15:44:10 -0700 | [diff] [blame] | 593 | usb_debug (" it uses %s command set\n", |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 594 | msc_subclass_strings[interface->bInterfaceSubClass]); |
Gabe Black | 93ded59 | 2012-11-01 15:44:10 -0700 | [diff] [blame] | 595 | usb_debug (" it uses %s protocol\n", |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 596 | msc_protocol_strings[interface->bInterfaceProtocol]); |
| 597 | |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 598 | |
| 599 | if (interface->bInterfaceProtocol != 0x50) { |
Dave Frodin | 6bf11cf | 2012-12-11 13:08:07 -0700 | [diff] [blame] | 600 | usb_debug (" Protocol not supported.\n"); |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 601 | return; |
| 602 | } |
| 603 | |
| 604 | if ((interface->bInterfaceSubClass != 2) && // ATAPI 8020 |
| 605 | (interface->bInterfaceSubClass != 5) && // ATAPI 8070 |
| 606 | (interface->bInterfaceSubClass != 6)) { // SCSI |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 607 | /* Other protocols, such as ATAPI don't seem to be very popular. looks like ATAPI would be really easy to add, if necessary. */ |
Dave Frodin | 6bf11cf | 2012-12-11 13:08:07 -0700 | [diff] [blame] | 608 | usb_debug (" Interface SubClass not supported.\n"); |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 609 | return; |
| 610 | } |
| 611 | |
| 612 | dev->data = malloc (sizeof (usbmsc_inst_t)); |
Stefan Reinauer | 5fe6e23 | 2009-07-31 11:39:55 +0000 | [diff] [blame] | 613 | if (!dev->data) |
Patrick Georgi | 2e768e7 | 2011-11-04 11:50:03 +0100 | [diff] [blame] | 614 | fatal("Not enough memory for USB MSC device.\n"); |
Stefan Reinauer | 5fe6e23 | 2009-07-31 11:39:55 +0000 | [diff] [blame] | 615 | |
Stefan Reinauer | b56f2d0 | 2010-03-25 22:17:36 +0000 | [diff] [blame] | 616 | MSC_INST (dev)->protocol = interface->bInterfaceSubClass; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 617 | MSC_INST (dev)->bulk_in = 0; |
| 618 | MSC_INST (dev)->bulk_out = 0; |
Nico Huber | 445a3a0 | 2012-06-21 10:52:49 +0200 | [diff] [blame] | 619 | MSC_INST (dev)->usbdisk_created = 0; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 620 | |
| 621 | for (i = 1; i <= dev->num_endp; i++) { |
| 622 | if (dev->endpoints[i].endpoint == 0) |
| 623 | continue; |
| 624 | if (dev->endpoints[i].type != BULK) |
| 625 | continue; |
| 626 | if ((dev->endpoints[i].direction == IN) |
| 627 | && (MSC_INST (dev)->bulk_in == 0)) |
| 628 | MSC_INST (dev)->bulk_in = &dev->endpoints[i]; |
| 629 | if ((dev->endpoints[i].direction == OUT) |
| 630 | && (MSC_INST (dev)->bulk_out == 0)) |
| 631 | MSC_INST (dev)->bulk_out = &dev->endpoints[i]; |
| 632 | } |
| 633 | |
Nico Huber | 445a3a0 | 2012-06-21 10:52:49 +0200 | [diff] [blame] | 634 | if (MSC_INST (dev)->bulk_in == 0) { |
Dave Frodin | 6bf11cf | 2012-12-11 13:08:07 -0700 | [diff] [blame] | 635 | usb_debug("couldn't find bulk-in endpoint"); |
Nico Huber | 445a3a0 | 2012-06-21 10:52:49 +0200 | [diff] [blame] | 636 | return; |
| 637 | } |
| 638 | if (MSC_INST (dev)->bulk_out == 0) { |
Dave Frodin | 6bf11cf | 2012-12-11 13:08:07 -0700 | [diff] [blame] | 639 | usb_debug("couldn't find bulk-out endpoint"); |
Nico Huber | 445a3a0 | 2012-06-21 10:52:49 +0200 | [diff] [blame] | 640 | return; |
| 641 | } |
Gabe Black | 93ded59 | 2012-11-01 15:44:10 -0700 | [diff] [blame] | 642 | usb_debug (" using endpoint %x as in, %x as out\n", |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 643 | MSC_INST (dev)->bulk_in->endpoint, |
| 644 | MSC_INST (dev)->bulk_out->endpoint); |
| 645 | |
Gabe Black | 93ded59 | 2012-11-01 15:44:10 -0700 | [diff] [blame] | 646 | usb_debug (" has %d luns\n", get_max_luns (dev) + 1); |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 647 | |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 648 | /* Test if unit is ready (nothing to do if it isn't). */ |
| 649 | if (usb_msc_test_unit_ready (dev) != USB_MSC_READY) |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 650 | return; |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 651 | |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 652 | /* Create the disk. */ |
| 653 | usb_msc_create_disk (dev); |
| 654 | } |
| 655 | |
| 656 | static void |
| 657 | usb_msc_poll (usbdev_t *dev) |
| 658 | { |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 659 | int prev_ready = MSC_INST (dev)->ready; |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 660 | |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 661 | if (usb_msc_test_unit_ready (dev) == USB_MSC_DETACHED) |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 662 | return; |
| 663 | |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 664 | if (!prev_ready && MSC_INST (dev)->ready) { |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 665 | usb_debug ("usb msc: not ready -> ready\n"); |
| 666 | usb_msc_create_disk (dev); |
Julius Werner | b59e850 | 2013-09-25 13:54:57 -0700 | [diff] [blame^] | 667 | } else if (prev_ready && !MSC_INST (dev)->ready) { |
Aaron Durbin | 1c20e38 | 2013-06-07 12:31:21 -0500 | [diff] [blame] | 668 | usb_debug ("usb msc: ready -> not ready\n"); |
| 669 | usb_msc_remove_disk (dev); |
Nico Huber | 445a3a0 | 2012-06-21 10:52:49 +0200 | [diff] [blame] | 670 | } |
Patrick Georgi | d21f68b | 2008-09-02 16:06:22 +0000 | [diff] [blame] | 671 | } |