| /* |
| * This file is part of the libpayload project. |
| * |
| * Copyright (C) 2008 coresystems GmbH |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| //#define USB_DEBUG |
| #include <endian.h> |
| #include <usb/usb.h> |
| #include <usb/usbmsc.h> |
| #include <usb/usbdisk.h> |
| |
| enum { |
| msc_subclass_rbc = 0x1, |
| msc_subclass_mmc2 = 0x2, |
| msc_subclass_qic157 = 0x3, |
| msc_subclass_ufi = 0x4, |
| msc_subclass_sff8070i = 0x5, |
| msc_subclass_scsitrans = 0x6 |
| }; |
| |
| static const char *msc_subclass_strings[7] = { |
| "(none)", |
| "RBC", |
| "MMC-2", |
| "QIC-157", |
| "UFI", |
| "SFF-8070i", |
| "SCSI transparent" |
| }; |
| enum { |
| msc_proto_cbi_wcomp = 0x0, |
| msc_proto_cbi_wocomp = 0x1, |
| msc_proto_bulk_only = 0x50 |
| }; |
| static const char *msc_protocol_strings[0x51] = { |
| "Control/Bulk/Interrupt protocol (with command completion interrupt)", |
| "Control/Bulk/Interrupt protocol (with no command completion interrupt)", |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| "Bulk-Only Transport" |
| }; |
| |
| static void |
| usb_msc_create_disk (usbdev_t *dev) |
| { |
| if (usbdisk_create) { |
| usbdisk_create (dev); |
| MSC_INST (dev)->usbdisk_created = 1; |
| } |
| } |
| |
| static void |
| usb_msc_remove_disk (usbdev_t *dev) |
| { |
| if (MSC_INST (dev)->usbdisk_created && usbdisk_remove) |
| usbdisk_remove (dev); |
| } |
| |
| static void |
| usb_msc_destroy (usbdev_t *dev) |
| { |
| if (dev->data) { |
| usb_msc_remove_disk (dev); |
| free (dev->data); |
| } |
| dev->data = 0; |
| } |
| |
| const int DEV_RESET = 0xff; |
| const int GET_MAX_LUN = 0xfe; |
| /* Many USB3 devices do not work with large transfer requests. |
| * Limit the request size to 64KB chunks to ensure maximum compatibility. */ |
| const int MAX_CHUNK_BYTES = 1024 * 64; |
| |
| const unsigned int cbw_signature = 0x43425355; |
| const unsigned int csw_signature = 0x53425355; |
| |
| typedef struct { |
| unsigned int dCBWSignature; |
| unsigned int dCBWTag; |
| unsigned int dCBWDataTransferLength; |
| unsigned char bmCBWFlags; |
| unsigned long bCBWLUN:4; |
| unsigned long:4; |
| unsigned long bCBWCBLength:5; |
| unsigned long:3; |
| unsigned char CBWCB[31 - 15]; |
| } __attribute__ ((packed)) cbw_t; |
| |
| typedef struct { |
| unsigned int dCSWSignature; |
| unsigned int dCSWTag; |
| unsigned int dCSWDataResidue; |
| unsigned char bCSWStatus; |
| } __attribute__ ((packed)) csw_t; |
| |
| enum { |
| /* |
| * MSC commands can be |
| * successful, |
| * fail with proper response or |
| * fail totally, which results in detaching of the usb device |
| * and immediate cleanup of the usbdev_t structure. |
| * In the latter case the caller has to make sure, that he won't |
| * use the device any more. |
| */ |
| MSC_COMMAND_OK = 0, MSC_COMMAND_FAIL, MSC_COMMAND_DETACHED |
| }; |
| |
| static int |
| request_sense (usbdev_t *dev); |
| static int |
| request_sense_no_media (usbdev_t *dev); |
| static void |
| usb_msc_poll (usbdev_t *dev); |
| |
| static int |
| reset_transport (usbdev_t *dev) |
| { |
| dev_req_t dr; |
| memset (&dr, 0, sizeof (dr)); |
| dr.bmRequestType = 0; |
| dr.data_dir = host_to_device; |
| #ifndef QEMU |
| dr.req_type = class_type; |
| dr.req_recp = iface_recp; |
| #endif |
| dr.bRequest = DEV_RESET; |
| dr.wValue = 0; |
| dr.wIndex = 0; |
| dr.wLength = 0; |
| |
| /* if any of these fails, detach device, as we are lost */ |
| if (dev->controller->control (dev, OUT, sizeof (dr), &dr, 0, 0) < 0 || |
| clear_stall (MSC_INST (dev)->bulk_in) || |
| clear_stall (MSC_INST (dev)->bulk_out)) { |
| usb_debug ("Detaching unresponsive device.\n"); |
| usb_detach_device (dev->controller, dev->address); |
| return MSC_COMMAND_DETACHED; |
| } |
| /* return fail as we are only called in case of failure */ |
| return MSC_COMMAND_FAIL; |
| } |
| |
| /* device may stall this command, so beware! */ |
| static int |
| get_max_luns (usbdev_t *dev) |
| { |
| unsigned char luns = 75; |
| dev_req_t dr; |
| dr.bmRequestType = 0; |
| dr.data_dir = device_to_host; |
| #ifndef QEMU |
| dr.req_type = class_type; |
| dr.req_recp = iface_recp; |
| #endif |
| dr.bRequest = GET_MAX_LUN; |
| dr.wValue = 0; |
| dr.wIndex = 0; |
| dr.wLength = 1; |
| if (dev->controller->control (dev, IN, sizeof (dr), &dr, 1, &luns) < 0) |
| luns = 0; // assume only 1 lun if req fails |
| return luns; |
| } |
| |
| unsigned int tag; |
| unsigned char lun = 0; |
| |
| static void |
| wrap_cbw (cbw_t *cbw, int datalen, cbw_direction dir, const u8 *cmd, |
| int cmdlen) |
| { |
| memset (cbw, 0, sizeof (cbw_t)); |
| |
| cbw->dCBWSignature = cbw_signature; |
| cbw->dCBWTag = ++tag; |
| cbw->bCBWLUN = lun; // static value per device |
| |
| cbw->dCBWDataTransferLength = datalen; |
| cbw->bmCBWFlags = dir; |
| memcpy (cbw->CBWCB, cmd, sizeof (cbw->CBWCB)); |
| cbw->bCBWCBLength = cmdlen; |
| } |
| |
| static int |
| get_csw (endpoint_t *ep, csw_t *csw) |
| { |
| if (ep->dev->controller->bulk (ep, sizeof (csw_t), (u8 *) csw, 1) < 0) { |
| clear_stall (ep); |
| if (ep->dev->controller->bulk |
| (ep, sizeof (csw_t), (u8 *) csw, 1) < 0) { |
| return reset_transport (ep->dev); |
| } |
| } |
| if (csw->dCSWTag != tag) { |
| return reset_transport (ep->dev); |
| } |
| return MSC_COMMAND_OK; |
| } |
| |
| static int |
| execute_command (usbdev_t *dev, cbw_direction dir, const u8 *cb, int cblen, |
| u8 *buf, int buflen, int residue_ok) |
| { |
| cbw_t cbw; |
| csw_t csw; |
| |
| int always_succeed = 0; |
| if ((cb[0] == 0x1b) && (cb[4] == 1)) { //start command, always succeed |
| always_succeed = 1; |
| } |
| wrap_cbw (&cbw, buflen, dir, cb, cblen); |
| if (dev->controller-> |
| bulk (MSC_INST (dev)->bulk_out, sizeof (cbw), (u8 *) &cbw, 0) < 0) { |
| return reset_transport (dev); |
| } |
| if (buflen > 0) { |
| if (dir == cbw_direction_data_in) { |
| if (dev->controller-> |
| bulk (MSC_INST (dev)->bulk_in, buflen, buf, 0) < 0) |
| clear_stall (MSC_INST (dev)->bulk_in); |
| } else { |
| if (dev->controller-> |
| bulk (MSC_INST (dev)->bulk_out, buflen, buf, 0) < 0) |
| clear_stall (MSC_INST (dev)->bulk_out); |
| } |
| } |
| int ret = get_csw (MSC_INST (dev)->bulk_in, &csw); |
| if (ret) { |
| return ret; |
| } else if (always_succeed == 1) { |
| /* return success, regardless of message */ |
| return MSC_COMMAND_OK; |
| } else if (csw.bCSWStatus == 2) { |
| /* phase error, reset transport */ |
| return reset_transport (dev); |
| } else if (csw.bCSWStatus == 0) { |
| if ((csw.dCSWDataResidue == 0) || residue_ok) |
| /* no error, exit */ |
| return MSC_COMMAND_OK; |
| else |
| /* missed some bytes */ |
| return MSC_COMMAND_FAIL; |
| } else { |
| if (cb[0] == 0x03) |
| /* requesting sense failed, that's bad */ |
| return MSC_COMMAND_FAIL; |
| else if (cb[0] == 0) |
| /* If command was TEST UNIT READY determine if the |
| * device is of removable type indicating no media |
| * found. */ |
| return request_sense_no_media (dev); |
| /* error "check condition" or reserved error */ |
| ret = request_sense (dev); |
| /* return fail or the status of request_sense if it's worse */ |
| return ret ? ret : MSC_COMMAND_FAIL; |
| } |
| } |
| |
| typedef struct { |
| unsigned char command; //0 |
| unsigned char res1; //1 |
| unsigned int block; //2-5 |
| unsigned char res2; //6 |
| unsigned short numblocks; //7-8 |
| unsigned char res3; //9 - the block is 10 bytes long |
| } __attribute__ ((packed)) cmdblock_t; |
| |
| typedef struct { |
| unsigned char command; //0 |
| unsigned char res1; //1 |
| unsigned char res2; //2 |
| unsigned char res3; //3 |
| unsigned char lun; //4 |
| unsigned char res4; //5 |
| } __attribute__ ((packed)) cmdblock6_t; |
| |
| /** |
| * Like readwrite_blocks, but for soft-sectors of 512b size. Converts the |
| * start and count from 512b units. |
| * Start and count must be aligned so that they match the native |
| * sector size. |
| * |
| * @param dev device to access |
| * @param start first sector to access |
| * @param n number of sectors to access |
| * @param dir direction of access: cbw_direction_data_in == read, cbw_direction_data_out == write |
| * @param buf buffer to read into or write from. Must be at least n*512 bytes |
| * @return 0 on success, 1 on failure |
| */ |
| int |
| readwrite_blocks_512 (usbdev_t *dev, int start, int n, |
| cbw_direction dir, u8 *buf) |
| { |
| int blocksize_divider = MSC_INST(dev)->blocksize / 512; |
| return readwrite_blocks (dev, start / blocksize_divider, |
| n / blocksize_divider, dir, buf); |
| } |
| |
| /** |
| * Reads or writes a number of sequential blocks on a USB storage device. |
| * As it uses the READ(10) SCSI-2 command, it's limited to storage devices |
| * of at most 2TB. It assumes sectors of 512 bytes. |
| * |
| * @param dev device to access |
| * @param start first sector to access |
| * @param n number of sectors to access |
| * @param dir direction of access: cbw_direction_data_in == read, cbw_direction_data_out == write |
| * @param buf buffer to read into or write from. Must be at least n*sectorsize bytes |
| * @return 0 on success, 1 on failure |
| */ |
| static int |
| readwrite_chunk (usbdev_t *dev, int start, int n, cbw_direction dir, u8 *buf) |
| { |
| cmdblock_t cb; |
| memset (&cb, 0, sizeof (cb)); |
| if (dir == cbw_direction_data_in) { |
| // read |
| cb.command = 0x28; |
| } else { |
| // write |
| cb.command = 0x2a; |
| } |
| cb.block = htonl (start); |
| cb.numblocks = htonw (n); |
| |
| return execute_command (dev, dir, (u8 *) &cb, sizeof (cb), buf, |
| n * MSC_INST(dev)->blocksize, 0) |
| != MSC_COMMAND_OK ? 1 : 0; |
| } |
| |
| /** |
| * Reads or writes a number of sequential blocks on a USB storage device |
| * that is split into MAX_CHUNK_BYTES size requests. |
| * |
| * As it uses the READ(10) SCSI-2 command, it's limited to storage devices |
| * of at most 2TB. It assumes sectors of 512 bytes. |
| * |
| * @param dev device to access |
| * @param start first sector to access |
| * @param n number of sectors to access |
| * @param dir direction of access: cbw_direction_data_in == read, |
| * cbw_direction_data_out == write |
| * @param buf buffer to read into or write from. |
| * Must be at least n*sectorsize bytes |
| * @return 0 on success, 1 on failure |
| */ |
| int |
| readwrite_blocks (usbdev_t *dev, int start, int n, cbw_direction dir, u8 *buf) |
| { |
| int chunk_size = MAX_CHUNK_BYTES / MSC_INST(dev)->blocksize; |
| int chunk; |
| |
| /* Read as many full chunks as needed. */ |
| for (chunk = 0; chunk < (n / chunk_size); chunk++) { |
| if (readwrite_chunk (dev, start + (chunk * chunk_size), |
| chunk_size, dir, |
| buf + (chunk * MAX_CHUNK_BYTES)) |
| != MSC_COMMAND_OK) |
| return 1; |
| } |
| |
| /* Read any remaining partial chunk at the end. */ |
| if (n % chunk_size) { |
| if (readwrite_chunk (dev, start + (chunk * chunk_size), |
| n % chunk_size, dir, |
| buf + (chunk * MAX_CHUNK_BYTES)) |
| != MSC_COMMAND_OK) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* Only request it, we don't interpret it. |
| On certain errors, that's necessary to get devices out of |
| a special state called "Contingent Allegiance Condition" */ |
| static int |
| request_sense (usbdev_t *dev) |
| { |
| u8 buf[19]; |
| cmdblock6_t cb; |
| memset (&cb, 0, sizeof (cb)); |
| cb.command = 0x3; |
| |
| return execute_command (dev, cbw_direction_data_in, (u8 *) &cb, |
| sizeof (cb), buf, 19, 1); |
| } |
| |
| static int request_sense_no_media (usbdev_t *dev) |
| { |
| u8 buf[19]; |
| int ret; |
| cmdblock6_t cb; |
| memset (&cb, 0, sizeof (cb)); |
| cb.command = 0x3; |
| |
| ret = execute_command (dev, cbw_direction_data_in, (u8 *) &cb, |
| sizeof (cb), buf, 19, 1); |
| |
| if (ret) |
| return ret; |
| |
| /* Check if sense key is set to NOT READY. */ |
| if ((buf[2] & 0xf) != 2) |
| return MSC_COMMAND_FAIL; |
| |
| /* Check if additional sense code is 0x3a. */ |
| if (buf[12] != 0x3a) |
| return MSC_COMMAND_FAIL; |
| |
| /* No media is present. Return MSC_COMMAND_OK while marking the disk |
| * not ready. */ |
| usb_debug ("Empty media found.\n"); |
| MSC_INST (dev)->ready = USB_MSC_NOT_READY; |
| return MSC_COMMAND_OK; |
| } |
| |
| static int |
| test_unit_ready (usbdev_t *dev) |
| { |
| cmdblock6_t cb; |
| memset (&cb, 0, sizeof (cb)); // full initialization for T-U-R |
| return execute_command (dev, cbw_direction_data_out, (u8 *) &cb, |
| sizeof (cb), 0, 0, 0); |
| } |
| |
| static int |
| spin_up (usbdev_t *dev) |
| { |
| cmdblock6_t cb; |
| memset (&cb, 0, sizeof (cb)); |
| cb.command = 0x1b; |
| cb.lun = 1; |
| return execute_command (dev, cbw_direction_data_out, (u8 *) &cb, |
| sizeof (cb), 0, 0, 0); |
| } |
| |
| static int |
| read_capacity (usbdev_t *dev) |
| { |
| cmdblock_t cb; |
| memset (&cb, 0, sizeof (cb)); |
| cb.command = 0x25; // read capacity |
| u32 buf[2]; |
| |
| usb_debug ("Reading capacity of mass storage device.\n"); |
| int count = 0, ret; |
| while (count++ < 20) { |
| switch (ret = execute_command |
| (dev, cbw_direction_data_in, (u8 *) &cb, |
| sizeof (cb), (u8 *)buf, 8, 0)) { |
| case MSC_COMMAND_OK: |
| break; |
| case MSC_COMMAND_FAIL: |
| continue; |
| default: /* if it's worse return */ |
| return ret; |
| } |
| break; |
| } |
| if (count >= 20) { |
| // still not successful, assume 2tb in 512byte sectors, which is just the same garbage as any other number, but probably more usable. |
| usb_debug (" assuming 2 TB with 512-byte sectors as READ CAPACITY didn't answer.\n"); |
| MSC_INST (dev)->numblocks = 0xffffffff; |
| MSC_INST (dev)->blocksize = 512; |
| } else { |
| MSC_INST (dev)->numblocks = ntohl(buf[0]) + 1; |
| MSC_INST (dev)->blocksize = ntohl(buf[1]); |
| } |
| usb_debug (" %d %d-byte sectors (%d MB)\n", MSC_INST (dev)->numblocks, |
| MSC_INST (dev)->blocksize, |
| /* round down high block counts to avoid integer overflow */ |
| MSC_INST (dev)->numblocks > 1000000 |
| ? (MSC_INST (dev)->numblocks / 1000) * MSC_INST (dev)->blocksize / 1000 : |
| MSC_INST (dev)->numblocks * MSC_INST (dev)->blocksize / 1000 / 1000); |
| return MSC_COMMAND_OK; |
| } |
| |
| static int |
| usb_msc_test_unit_ready (usbdev_t *dev) |
| { |
| int i; |
| time_t start_time_secs; |
| struct timeval tv; |
| /* SCSI/ATA specs say we have to wait up to 30s, but most devices |
| * are ready much sooner. Use a 5 sec timeout to better accomodate |
| * devices which fail to respond. */ |
| const int timeout_secs = 5; |
| |
| usb_debug (" Waiting for device to become ready..."); |
| |
| /* Initially mark the device ready. */ |
| MSC_INST (dev)->ready = USB_MSC_READY; |
| gettimeofday (&tv, NULL); |
| start_time_secs = tv.tv_sec; |
| |
| while (tv.tv_sec - start_time_secs < timeout_secs) { |
| switch (test_unit_ready (dev)) { |
| case MSC_COMMAND_OK: |
| break; |
| case MSC_COMMAND_FAIL: |
| mdelay (100); |
| usb_debug ("."); |
| gettimeofday (&tv, NULL); |
| continue; |
| default: |
| /* Device detached, return immediately */ |
| return USB_MSC_DETACHED; |
| } |
| break; |
| } |
| if (!(tv.tv_sec - start_time_secs < timeout_secs)) { |
| usb_debug ("timeout. Device not ready.\n"); |
| MSC_INST (dev)->ready = USB_MSC_NOT_READY; |
| } |
| |
| /* Don't bother spinning up the stroage device if the device is not |
| * ready. This can happen when empty card readers are present. |
| * Polling will pick it back up if readiness changes. */ |
| if (!MSC_INST (dev)->ready) |
| return MSC_INST (dev)->ready; |
| |
| usb_debug ("ok.\n"); |
| |
| usb_debug (" spin up"); |
| for (i = 0; i < 30; i++) { |
| usb_debug ("."); |
| switch (spin_up (dev)) { |
| case MSC_COMMAND_OK: |
| usb_debug (" OK."); |
| break; |
| case MSC_COMMAND_FAIL: |
| mdelay (100); |
| continue; |
| default: |
| /* Device detached, return immediately */ |
| return USB_MSC_DETACHED; |
| } |
| break; |
| } |
| usb_debug ("\n"); |
| |
| if (read_capacity (dev) == MSC_COMMAND_DETACHED) |
| return USB_MSC_DETACHED; |
| |
| return MSC_INST (dev)->ready; |
| } |
| |
| void |
| usb_msc_init (usbdev_t *dev) |
| { |
| int i; |
| |
| /* init .data before setting .destroy */ |
| dev->data = NULL; |
| |
| dev->destroy = usb_msc_destroy; |
| dev->poll = usb_msc_poll; |
| |
| configuration_descriptor_t *cd = |
| (configuration_descriptor_t *) dev->configuration; |
| interface_descriptor_t *interface = |
| (interface_descriptor_t *) (((char *) cd) + cd->bLength); |
| |
| usb_debug (" it uses %s command set\n", |
| msc_subclass_strings[interface->bInterfaceSubClass]); |
| usb_debug (" it uses %s protocol\n", |
| msc_protocol_strings[interface->bInterfaceProtocol]); |
| |
| |
| if (interface->bInterfaceProtocol != 0x50) { |
| usb_debug (" Protocol not supported.\n"); |
| return; |
| } |
| |
| if ((interface->bInterfaceSubClass != 2) && // ATAPI 8020 |
| (interface->bInterfaceSubClass != 5) && // ATAPI 8070 |
| (interface->bInterfaceSubClass != 6)) { // SCSI |
| /* Other protocols, such as ATAPI don't seem to be very popular. looks like ATAPI would be really easy to add, if necessary. */ |
| usb_debug (" Interface SubClass not supported.\n"); |
| return; |
| } |
| |
| dev->data = malloc (sizeof (usbmsc_inst_t)); |
| if (!dev->data) |
| fatal("Not enough memory for USB MSC device.\n"); |
| |
| MSC_INST (dev)->protocol = interface->bInterfaceSubClass; |
| MSC_INST (dev)->bulk_in = 0; |
| MSC_INST (dev)->bulk_out = 0; |
| MSC_INST (dev)->usbdisk_created = 0; |
| |
| for (i = 1; i <= dev->num_endp; i++) { |
| if (dev->endpoints[i].endpoint == 0) |
| continue; |
| if (dev->endpoints[i].type != BULK) |
| continue; |
| if ((dev->endpoints[i].direction == IN) |
| && (MSC_INST (dev)->bulk_in == 0)) |
| MSC_INST (dev)->bulk_in = &dev->endpoints[i]; |
| if ((dev->endpoints[i].direction == OUT) |
| && (MSC_INST (dev)->bulk_out == 0)) |
| MSC_INST (dev)->bulk_out = &dev->endpoints[i]; |
| } |
| |
| if (MSC_INST (dev)->bulk_in == 0) { |
| usb_debug("couldn't find bulk-in endpoint"); |
| return; |
| } |
| if (MSC_INST (dev)->bulk_out == 0) { |
| usb_debug("couldn't find bulk-out endpoint"); |
| return; |
| } |
| usb_debug (" using endpoint %x as in, %x as out\n", |
| MSC_INST (dev)->bulk_in->endpoint, |
| MSC_INST (dev)->bulk_out->endpoint); |
| |
| usb_debug (" has %d luns\n", get_max_luns (dev) + 1); |
| |
| /* Test if unit is ready (nothing to do if it isn't). */ |
| if (usb_msc_test_unit_ready (dev) != USB_MSC_READY) |
| return; |
| |
| /* Create the disk. */ |
| usb_msc_create_disk (dev); |
| } |
| |
| static void |
| usb_msc_poll (usbdev_t *dev) |
| { |
| int prev_ready = MSC_INST (dev)->ready; |
| |
| if (usb_msc_test_unit_ready (dev) == USB_MSC_DETACHED) |
| return; |
| |
| if (!prev_ready && MSC_INST (dev)->ready) { |
| usb_debug ("usb msc: not ready -> ready\n"); |
| usb_msc_create_disk (dev); |
| } else if (prev_ready && !MSC_INST (dev)->ready) { |
| usb_debug ("usb msc: ready -> not ready\n"); |
| usb_msc_remove_disk (dev); |
| } |
| } |