367 lines
10 KiB
C++
367 lines
10 KiB
C++
/* mbed USBHost Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "USBHostMSD.h"
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#if USBHOST_MSD
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#include "dbg.h"
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#define CBW_SIGNATURE 0x43425355
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#define CSW_SIGNATURE 0x53425355
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#define DEVICE_TO_HOST 0x80
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#define HOST_TO_DEVICE 0x00
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#define GET_MAX_LUN (0xFE)
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#define BO_MASS_STORAGE_RESET (0xFF)
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USBHostMSD::USBHostMSD(const char * rootdir) : FATFileSystem(rootdir)
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{
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host = USBHost::getHostInst();
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init();
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}
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void USBHostMSD::init() {
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dev_connected = false;
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dev = NULL;
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bulk_in = NULL;
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bulk_out = NULL;
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dev_connected = false;
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blockSize = 0;
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blockCount = 0;
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msd_intf = -1;
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msd_device_found = false;
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disk_init = false;
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dev_connected = false;
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nb_ep = 0;
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}
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bool USBHostMSD::connected()
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{
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return dev_connected;
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}
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bool USBHostMSD::connect()
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{
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if (dev_connected) {
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return true;
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}
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for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) {
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if ((dev = host->getDevice(i)) != NULL) {
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USB_DBG("Trying to connect MSD device\r\n");
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if(host->enumerate(dev, this))
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break;
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if (msd_device_found) {
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bulk_in = dev->getEndpoint(msd_intf, BULK_ENDPOINT, IN);
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bulk_out = dev->getEndpoint(msd_intf, BULK_ENDPOINT, OUT);
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if (!bulk_in || !bulk_out)
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continue;
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USB_INFO("New MSD device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, msd_intf);
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dev->setName("MSD", msd_intf);
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host->registerDriver(dev, msd_intf, this, &USBHostMSD::init);
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dev_connected = true;
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return true;
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}
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} //if()
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} //for()
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init();
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return false;
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}
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/*virtual*/ void USBHostMSD::setVidPid(uint16_t vid, uint16_t pid)
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{
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// we don't check VID/PID for MSD driver
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}
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/*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
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{
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if ((msd_intf == -1) &&
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(intf_class == MSD_CLASS) &&
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(intf_subclass == 0x06) &&
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(intf_protocol == 0x50)) {
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msd_intf = intf_nb;
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return true;
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}
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return false;
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}
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/*virtual*/ bool USBHostMSD::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used
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{
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if (intf_nb == msd_intf) {
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if (type == BULK_ENDPOINT) {
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nb_ep++;
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if (nb_ep == 2)
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msd_device_found = true;
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return true;
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}
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}
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return false;
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}
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int USBHostMSD::testUnitReady() {
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USB_DBG("Test unit ready");
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return SCSITransfer(NULL, 6, DEVICE_TO_HOST, 0, 0);
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}
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int USBHostMSD::readCapacity() {
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USB_DBG("Read capacity");
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uint8_t cmd[10] = {0x25,0,0,0,0,0,0,0,0,0};
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uint8_t result[8];
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int status = SCSITransfer(cmd, 10, DEVICE_TO_HOST, result, 8);
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if (status == 0) {
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blockCount = (result[0] << 24) | (result[1] << 16) | (result[2] << 8) | result[3];
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blockSize = (result[4] << 24) | (result[5] << 16) | (result[6] << 8) | result[7];
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USB_INFO("MSD [dev: %p] - blockCount: %lld, blockSize: %d, Capacity: %lld\r\n", dev, blockCount, blockSize, blockCount*blockSize);
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}
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return status;
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}
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int USBHostMSD::SCSIRequestSense() {
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USB_DBG("Request sense");
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uint8_t cmd[6] = {0x03,0,0,0,18,0};
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uint8_t result[18];
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int status = SCSITransfer(cmd, 6, DEVICE_TO_HOST, result, 18);
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return status;
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}
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int USBHostMSD::inquiry(uint8_t lun, uint8_t page_code) {
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USB_DBG("Inquiry");
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uint8_t evpd = (page_code == 0) ? 0 : 1;
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uint8_t cmd[6] = {0x12, uint8_t((lun << 5) | evpd), page_code, 0, 36, 0};
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uint8_t result[36];
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int status = SCSITransfer(cmd, 6, DEVICE_TO_HOST, result, 36);
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if (status == 0) {
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char vid_pid[17];
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memcpy(vid_pid, &result[8], 8);
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vid_pid[8] = 0;
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USB_INFO("MSD [dev: %p] - Vendor ID: %s", dev, vid_pid);
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memcpy(vid_pid, &result[16], 16);
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vid_pid[16] = 0;
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USB_INFO("MSD [dev: %p] - Product ID: %s", dev, vid_pid);
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memcpy(vid_pid, &result[32], 4);
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vid_pid[4] = 0;
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USB_INFO("MSD [dev: %p] - Product rev: %s", dev, vid_pid);
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}
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return status;
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}
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int USBHostMSD::checkResult(uint8_t res, USBEndpoint * ep) {
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// if ep stalled: send clear feature
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if (res == USB_TYPE_STALL_ERROR) {
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res = host->controlWrite( dev,
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USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
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CLEAR_FEATURE,
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0, ep->getAddress(), NULL, 0);
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// set state to IDLE if clear feature successful
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if (res == USB_TYPE_OK) {
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ep->setState(USB_TYPE_IDLE);
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}
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}
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if (res != USB_TYPE_OK)
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return -1;
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return 0;
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}
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int USBHostMSD::SCSITransfer(uint8_t * cmd, uint8_t cmd_len, int flags, uint8_t * data, uint32_t transfer_len) {
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int res = 0;
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cbw.Signature = CBW_SIGNATURE;
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cbw.Tag = 0;
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cbw.DataLength = transfer_len;
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cbw.Flags = flags;
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cbw.LUN = 0;
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cbw.CBLength = cmd_len;
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memset(cbw.CB,0,sizeof(cbw.CB));
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if (cmd) {
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memcpy(cbw.CB,cmd,cmd_len);
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}
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// send the cbw
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USB_DBG("Send CBW");
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res = host->bulkWrite(dev, bulk_out,(uint8_t *)&cbw, 31);
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if (checkResult(res, bulk_out))
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return -1;
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// data stage if needed
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if (data) {
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USB_DBG("data stage");
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if (flags == HOST_TO_DEVICE) {
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res = host->bulkWrite(dev, bulk_out, data, transfer_len);
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if (checkResult(res, bulk_out))
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return -1;
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} else if (flags == DEVICE_TO_HOST) {
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res = host->bulkRead(dev, bulk_in, data, transfer_len);
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if (checkResult(res, bulk_in))
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return -1;
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}
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}
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// status stage
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csw.Signature = 0;
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USB_DBG("Read CSW");
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res = host->bulkRead(dev, bulk_in,(uint8_t *)&csw, 13);
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if (checkResult(res, bulk_in))
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return -1;
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if (csw.Signature != CSW_SIGNATURE) {
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return -1;
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}
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USB_DBG("recv csw: status: %d", csw.Status);
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// ModeSense?
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if ((csw.Status == 1) && (cmd[0] != 0x03)) {
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USB_DBG("request mode sense");
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return SCSIRequestSense();
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}
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// perform reset recovery
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if ((csw.Status == 2) && (cmd[0] != 0x03)) {
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// send Bulk-Only Mass Storage Reset request
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res = host->controlWrite( dev,
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USB_RECIPIENT_INTERFACE | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_CLASS,
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BO_MASS_STORAGE_RESET,
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0, msd_intf, NULL, 0);
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// unstall both endpoints
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res = host->controlWrite( dev,
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USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
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CLEAR_FEATURE,
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0, bulk_in->getAddress(), NULL, 0);
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res = host->controlWrite( dev,
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USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
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CLEAR_FEATURE,
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0, bulk_out->getAddress(), NULL, 0);
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}
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return csw.Status;
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}
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int USBHostMSD::dataTransfer(uint8_t * buf, uint32_t block, uint8_t nbBlock, int direction) {
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uint8_t cmd[10];
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memset(cmd,0,10);
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cmd[0] = (direction == DEVICE_TO_HOST) ? 0x28 : 0x2A;
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cmd[2] = (block >> 24) & 0xff;
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cmd[3] = (block >> 16) & 0xff;
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cmd[4] = (block >> 8) & 0xff;
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cmd[5] = block & 0xff;
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cmd[7] = (nbBlock >> 8) & 0xff;
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cmd[8] = nbBlock & 0xff;
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return SCSITransfer(cmd, 10, direction, buf, blockSize*nbBlock);
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}
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int USBHostMSD::getMaxLun() {
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uint8_t buf[1], res;
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res = host->controlRead( dev, USB_RECIPIENT_INTERFACE | USB_DEVICE_TO_HOST | USB_REQUEST_TYPE_CLASS,
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0xfe, 0, msd_intf, buf, 1);
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USB_DBG("max lun: %d", buf[0]);
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return res;
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}
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int USBHostMSD::disk_initialize() {
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USB_DBG("FILESYSTEM: init");
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uint16_t i, timeout = 10;
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getMaxLun();
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for (i = 0; i < timeout; i++) {
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Thread::wait(100);
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if (!testUnitReady())
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break;
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}
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if (i == timeout) {
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disk_init = false;
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return -1;
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}
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inquiry(0, 0);
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disk_init = 1;
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return readCapacity();
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}
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int USBHostMSD::disk_write(const uint8_t* buffer, uint64_t block_number, uint8_t count) {
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USB_DBG("FILESYSTEM: write block: %lld, count: %d", block_number, count);
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if (!disk_init) {
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disk_initialize();
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}
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if (!disk_init)
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return -1;
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for (uint64_t b = block_number; b < block_number + count; b++) {
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if (dataTransfer((uint8_t*)buffer, b, 1, HOST_TO_DEVICE))
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return -1;
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buffer += 512;
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}
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return 0;
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}
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int USBHostMSD::disk_read(uint8_t* buffer, uint64_t block_number, uint8_t count) {
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USB_DBG("FILESYSTEM: read block: %lld, count: %d", block_number, count);
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if (!disk_init) {
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disk_initialize();
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}
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if (!disk_init)
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return -1;
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for (uint64_t b = block_number; b < block_number + count; b++) {
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if (dataTransfer((uint8_t*)buffer, b, 1, DEVICE_TO_HOST))
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return -1;
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buffer += 512;
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}
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return 0;
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}
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uint64_t USBHostMSD::disk_sectors() {
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USB_DBG("FILESYSTEM: sectors");
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if (!disk_init) {
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disk_initialize();
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}
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if (!disk_init)
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return 0;
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return blockCount;
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}
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#endif
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