ST
USBHOST lib for STM
Dependents: door-access-controller-dev
Diff: USBHostMSD/USBHostMSD.cpp
- Revision:
- 1:ab240722d7ef
- Child:
- 3:1c76b46ad779
- Child:
- 4:fb979eb32081
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/USBHostMSD/USBHostMSD.cpp Wed Feb 15 10:49:44 2017 +0100
@@ -0,0 +1,366 @@
+/* mbed USBHost Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#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)
+#define BO_MASS_STORAGE_RESET (0xFF)
+
+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;
+ nb_ep = 0;
+}
+
+
+bool USBHostMSD::connected()
+{
+ return dev_connected;
+}
+
+bool USBHostMSD::connect()
+{
+
+ if (dev_connected) {
+ return true;
+ }
+
+ for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) {
+ if ((dev = host->getDevice(i)) != NULL) {
+
+ USB_DBG("Trying to connect MSD device\r\n");
+
+ 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)
+ continue;
+
+ USB_INFO("New MSD device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, msd_intf);
+ dev->setName("MSD", msd_intf);
+ host->registerDriver(dev, msd_intf, this, &USBHostMSD::init);
+
+ dev_connected = true;
+ return true;
+ }
+ } //if()
+ } //for()
+ init();
+ 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) {
+ nb_ep++;
+ if (nb_ep == 2)
+ msd_device_found = true;
+ return true;
+ }
+ }
+ return false;
+}
+
+
+int USBHostMSD::testUnitReady() {
+ USB_DBG("Test unit ready");
+ return SCSITransfer(NULL, 6, DEVICE_TO_HOST, 0, 0);
+}
+
+
+int USBHostMSD::readCapacity() {
+ USB_DBG("Read capacity");
+ 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: %u, blockSize: %d, Capacity: %d\r\n", dev, blockCount, blockSize, blockCount*blockSize);
+ }
+ return status;
+}
+
+
+int USBHostMSD::SCSIRequestSense() {
+ USB_DBG("Request sense");
+ uint8_t cmd[6] = {0x03,0,0,0,18,0};
+ uint8_t result[18];
+ int status = SCSITransfer(cmd, 6, DEVICE_TO_HOST, result, 18);
+ return status;
+}
+
+
+int USBHostMSD::inquiry(uint8_t lun, uint8_t page_code) {
+ USB_DBG("Inquiry");
+ uint8_t evpd = (page_code == 0) ? 0 : 1;
+ uint8_t cmd[6] = {0x12, uint8_t((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[17];
+ 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], 16);
+ vid_pid[16] = 0;
+ USB_INFO("MSD [dev: %p] - Product 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
+ USB_DBG("Send CBW");
+ res = host->bulkWrite(dev, bulk_out,(uint8_t *)&cbw, 31);
+ if (checkResult(res, bulk_out))
+ return -1;
+
+ // data stage if needed
+ if (data) {
+ USB_DBG("data stage");
+ 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;
+ USB_DBG("Read CSW");
+ res = host->bulkRead(dev, bulk_in,(uint8_t *)&csw, 13);
+ if (checkResult(res, bulk_in))
+ return -1;
+
+ if (csw.Signature != CSW_SIGNATURE) {
+ return -1;
+ }
+
+ USB_DBG("recv csw: status: %d", csw.Status);
+
+ // ModeSense?
+ if ((csw.Status == 1) && (cmd[0] != 0x03)) {
+ USB_DBG("request mode sense");
+ return SCSIRequestSense();
+ }
+
+ // perform reset recovery
+ if ((csw.Status == 2) && (cmd[0] != 0x03)) {
+
+ // send Bulk-Only Mass Storage Reset request
+ res = host->controlWrite( dev,
+ USB_RECIPIENT_INTERFACE | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_CLASS,
+ BO_MASS_STORAGE_RESET,
+ 0, msd_intf, NULL, 0);
+
+ // unstall both endpoints
+ res = host->controlWrite( dev,
+ USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
+ CLEAR_FEATURE,
+ 0, bulk_in->getAddress(), NULL, 0);
+
+ res = host->controlWrite( dev,
+ USB_RECIPIENT_ENDPOINT | USB_HOST_TO_DEVICE | USB_REQUEST_TYPE_STANDARD,
+ CLEAR_FEATURE,
+ 0, bulk_out->getAddress(), NULL, 0);
+
+ }
+
+ 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::getMaxLun() {
+ uint8_t buf[1], res;
+ res = host->controlRead( dev, USB_RECIPIENT_INTERFACE | USB_DEVICE_TO_HOST | USB_REQUEST_TYPE_CLASS,
+ 0xfe, 0, msd_intf, buf, 1);
+ USB_DBG("max lun: %d", buf[0]);
+ return res;
+}
+
+int USBHostMSD::disk_initialize() {
+ USB_DBG("FILESYSTEM: init");
+ uint16_t i, timeout = 10;
+
+ getMaxLun();
+
+ for (i = 0; i < timeout; i++) {
+ Thread::wait(100);
+ 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, uint32_t block_number, uint32_t count) {
+ USB_DBG("FILESYSTEM: write block: %lld, count: %d", block_number, count);
+ if (!disk_init) {
+ disk_initialize();
+ }
+ if (!disk_init)
+ return -1;
+ for (uint32_t b = block_number; b < block_number + count; b++) {
+ if (dataTransfer((uint8_t*)buffer, b, 1, HOST_TO_DEVICE))
+ return -1;
+ buffer += 512;
+ }
+ return 0;
+}
+
+int USBHostMSD::disk_read(uint8_t* buffer, uint32_t block_number, uint32_t count) {
+ USB_DBG("FILESYSTEM: read block: %lld, count: %d", block_number, count);
+ if (!disk_init) {
+ disk_initialize();
+ }
+ if (!disk_init)
+ return -1;
+ for (uint32_t b = block_number; b < block_number + count; b++) {
+ if (dataTransfer((uint8_t*)buffer, b, 1, DEVICE_TO_HOST))
+ return -1;
+ buffer += 512;
+ }
+ return 0;
+}
+
+uint32_t USBHostMSD::disk_sectors() {
+ USB_DBG("FILESYSTEM: sectors");
+ if (!disk_init) {
+ disk_initialize();
+ }
+ if (!disk_init)
+ return 0;
+ return blockCount;
+}
+
+#endif