USBHost custom library.
Dependents: GR-PEACH_HVC-P2_sample_client mbed-os-storage-access GR-PEACH_Digital_Signage GR-PEACH_Audio_Playback_Sample ... more
Fork of USBHost by
Diff: USBHostMSD/USBHostMSD.cpp
- Revision:
- 0:a554658735bf
- Child:
- 4:b320d68e98e7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBHostMSD/USBHostMSD.cpp Wed Mar 06 16:27:14 2013 +0000 @@ -0,0 +1,311 @@ +/* Copyright (c) 2010-2012 mbed.org, MIT License +* +* Permission is hereby granted, free of charge, to any person obtaining a copy of this software +* and associated documentation files (the "Software"), to deal in the Software without +* restriction, including without limitation the rights to use, copy, modify, merge, publish, +* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the +* Software is furnished to do so, subject to the following conditions: +* +* The above copyright notice and this permission notice shall be included in all copies or +* substantial portions of the Software. +* +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING +* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, +* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +#include "USBHostMSD.h" + +#if USBHOST_MSD + +#include "dbg.h" + +#define CBW_SIGNATURE 0x43425355 +#define CSW_SIGNATURE 0x53425355 + +#define DEVICE_TO_HOST 0x80 +#define HOST_TO_DEVICE 0x00 + +#define GET_MAX_LUN (0xFE) + +USBHostMSD::USBHostMSD(const char * rootdir) : FATFileSystem(rootdir) +{ + host = USBHost::getHostInst(); + init(); +} + +void USBHostMSD::init() { + dev_connected = false; + dev = NULL; + bulk_in = NULL; + bulk_out = NULL; + dev_connected = false; + blockSize = 0; + blockCount = 0; + msd_intf = -1; + msd_device_found = false; + disk_init = false; + dev_connected = false; +} + + +bool USBHostMSD::connected() +{ + return dev_connected; +} + +bool USBHostMSD::connect() +{ + U8 i; + + if (dev_connected) { + return true; + } + + for (i = 0; i < MAX_DEVICE_CONNECTED; i++) { + if ((dev = host->getDevice(i)) != NULL) { + + if(host->enumerate(dev, this)) + break; + + if (msd_device_found) { + bulk_in = dev->getEndpoint(msd_intf, BULK_ENDPOINT, IN); + bulk_out = dev->getEndpoint(msd_intf, BULK_ENDPOINT, OUT); + + if (!bulk_in || !bulk_out) + break; + + USB_INFO("New MSD device: VID:%04x PID:%04x [dev: %p]", dev->getVid(), dev->getPid(), dev); + dev->setName("MSD"); + host->registerDriver(dev, msd_intf, this, &USBHostMSD::init); + + dev_connected = true; + return true; + } + } //if() + } //for() + return false; +} + +/*virtual*/ void USBHostMSD::setVidPid(uint16_t vid, uint16_t pid) +{ + // we don't check VID/PID for MSD driver +} + +/*virtual*/ bool USBHostMSD::parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol) //Must return true if the interface should be parsed +{ + if ((msd_intf == -1) && + (intf_class == MSD_CLASS) && + (intf_subclass == 0x06) && + (intf_protocol == 0x50)) { + msd_intf = intf_nb; + return true; + } + return false; +} + +/*virtual*/ bool USBHostMSD::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used +{ + if (intf_nb == msd_intf) { + if (type == BULK_ENDPOINT) { + msd_device_found = true; + return true; + } + } + return false; +} + + +int USBHostMSD::testUnitReady() { + return SCSITransfer(NULL, 6, DEVICE_TO_HOST, 0, 0); +} + +int USBHostMSD::readCapacity() { + uint8_t cmd[10] = {0x25,0,0,0,0,0,0,0,0,0}; + uint8_t result[8]; + int status = SCSITransfer(cmd, 10, DEVICE_TO_HOST, result, 8); + if (status == 0) { + blockCount = (result[0] << 24) | (result[1] << 16) | (result[2] << 8) | result[3]; + blockSize = (result[4] << 24) | (result[5] << 16) | (result[6] << 8) | result[7]; + USB_INFO("MSD [dev: %p] - blockCount: %lld, blockSize: %d\r\n", dev, blockCount, blockSize); + } + return status; +} + + +int USBHostMSD::SCSIRequestSense() { + uint8_t cmd[5] = {0x03,0,0,0,0x13}; + uint8_t result[19]; + int status = SCSITransfer(cmd, 5, DEVICE_TO_HOST, result, 19); + return status; +} + + +int USBHostMSD::inquiry(uint8_t lun, uint8_t page_code) { + uint8_t evpd = (page_code == 0) ? 0 : 1; + uint8_t cmd[6] = {0x12, (lun << 5) | evpd, page_code, 0, 36, 0}; + uint8_t result[36]; + int status = SCSITransfer(cmd, 6, DEVICE_TO_HOST, result, 36); + if (status == 0) { + char vid_pid[9]; + memcpy(vid_pid, &result[8], 8); + vid_pid[8] = 0; + USB_INFO("MSD [dev: %p] - Vendor ID: %s", dev, vid_pid); + + memcpy(vid_pid, &result[16], 8); + USB_INFO("MSD [dev: %p] - Produc ID: %s", dev, vid_pid); + + memcpy(vid_pid, &result[32], 4); + vid_pid[4] = 0; + USB_INFO("MSD [dev: %p] - Product rev: %s", dev, vid_pid); + } + return status; +} + +int USBHostMSD::checkResult(uint8_t res, USBEndpoint * ep) { + // if ep stalled: send clear feature + if (res == USB_TYPE_STALL_ERROR) { + res = host->controlWrite( dev, + USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD, + CLEAR_FEATURE, + 0, + ep->getAddress(), + NULL, + 0); + // set state to IDLE if clear feature successful + if (res == USB_TYPE_OK) { + ep->setState(USB_TYPE_IDLE); + } + } + + if (res != USB_TYPE_OK) + return -1; + + return 0; +} + + +int USBHostMSD::SCSITransfer(uint8_t * cmd, uint8_t cmd_len, int flags, uint8_t * data, uint32_t transfer_len) { + + int res = 0; + + cbw.Signature = CBW_SIGNATURE; + cbw.Tag = 0; + cbw.DataLength = transfer_len; + cbw.Flags = flags; + cbw.LUN = 0; + cbw.CBLength = cmd_len; + memset(cbw.CB,0,sizeof(cbw.CB)); + if (cmd) { + memcpy(cbw.CB,cmd,cmd_len); + } + + // send the cbw + res = host->bulkWrite(dev, bulk_out,(uint8_t *)&cbw, 31); + if (checkResult(res, bulk_out)) + return -1; + + // data stage if needed + if (data) { + if (flags == HOST_TO_DEVICE) { + + res = host->bulkWrite(dev, bulk_out, data, transfer_len); + if (checkResult(res, bulk_out)) + return -1; + + } else if (flags == DEVICE_TO_HOST) { + + res = host->bulkRead(dev, bulk_in, data, transfer_len); + if (checkResult(res, bulk_in)) + return -1; + } + } + + // status stage + csw.Signature = 0; + res = host->bulkRead(dev, bulk_in,(uint8_t *)&csw, 13); + if (checkResult(res, bulk_in)) + return -1; + + if (csw.Signature != CSW_SIGNATURE) { + return -1; + } + + // ModeSense? + if ((csw.Status == 1) && (cmd[0] != 0x03)) + return SCSIRequestSense(); + + USB_DBG("recv csw: status: %d", csw.Status); + return csw.Status; +} + + +int USBHostMSD::dataTransfer(uint8_t * buf, uint32_t block, uint8_t nbBlock, int direction) { + uint8_t cmd[10]; + memset(cmd,0,10); + cmd[0] = (direction == DEVICE_TO_HOST) ? 0x28 : 0x2A; + + cmd[2] = (block >> 24) & 0xff; + cmd[3] = (block >> 16) & 0xff; + cmd[4] = (block >> 8) & 0xff; + cmd[5] = block & 0xff; + + cmd[7] = (nbBlock >> 8) & 0xff; + cmd[8] = nbBlock & 0xff; + + return SCSITransfer(cmd, 10, direction, buf, blockSize*nbBlock); +} + + +int USBHostMSD::disk_initialize() { + USB_DBG("FILESYSTEM: init"); + U8 i, timeout = 10; + + for (i = 0; i < timeout; i++) { + if (!testUnitReady()) + break; + } + + if (i == timeout) { + disk_init = false; + return -1; + } + inquiry(0, 0); + disk_init = 1; + return readCapacity(); +} + +int USBHostMSD::disk_write(const uint8_t *buffer, uint64_t block_number) { + USB_DBG("FILESYSTEM: write block: %lld", block_number); + if (!disk_init) { + disk_initialize(); + } + if (!disk_init) + return -1; + return dataTransfer((uint8_t *)buffer, block_number, 1, HOST_TO_DEVICE); +} + +int USBHostMSD::disk_read(uint8_t * buffer, uint64_t block_number) { + USB_DBG("FILESYSTEM: read block %lld", block_number); + if (!disk_init) { + disk_initialize(); + } + if (!disk_init) + return -1; + return dataTransfer((uint8_t *)buffer, block_number, 1, DEVICE_TO_HOST); +} + +uint64_t USBHostMSD::disk_sectors() { + USB_DBG("FILESYSTEM: sectors"); + if (!disk_init) { + disk_initialize(); + } + if (!disk_init) + return 0; + return blockCount; +} + +#endif +