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455 lines
20 KiB
455 lines
20 KiB
3 years ago
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/*!
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\file usbh_msc_bbb.c
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\brief USB MSC BBB protocol related functions
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\version 2019-06-05, V1.0.0, firmware for GD32VF103
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*/
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/*
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Copyright (c) 2019, GigaDevice Semiconductor Inc.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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#include "usbh_transc.h"
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#include "drv_usbh_int.h"
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#include "usbh_msc_core.h"
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#include "usbh_msc_scsi.h"
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#include "usbh_msc_bbb.h"
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usbh_cbw_pkt msc_cbw_data;
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usbh_csw_pkt msc_csw_data;
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static uint32_t bot_stall_error_count; /* keeps count of stall error cases */
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usbh_botxfer msc_botxfer_param;
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/*!
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\brief initialize the mass storage parameters
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\param[in] pudev: pointer to usb core instance
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\param[out] none
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\retval none
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*/
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void usbh_msc_init (usb_core_driver *pudev)
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{
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if (pudev->host.connect_status) {
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msc_cbw_data.field.dCBWSignature = BBB_CBW_SIGNATURE;
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msc_cbw_data.field.dCBWTag = USBH_MSC_BOT_CBW_TAG;
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msc_cbw_data.field.bCBWLUN = 0; /* only one lun is supported */
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msc_botxfer_param.cmd_state_machine = CMD_SEND_STATE;
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}
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bot_stall_error_count = 0;
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msc_error_count = 0;
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}
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/*!
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\brief manage the different states of BOT transfer and updates the status to upper layer
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\param[in] pudev: pointer to usb core instance
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\param[in] puhost: pointer to usb host
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\param[out] none
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\retval none
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*/
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void usbh_msc_botxfer (usb_core_driver *pudev, usbh_host *puhost)
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{
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uint8_t xfer_dir, index;
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static uint32_t remain_len;
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static uint8_t *data_pointer, *data_pointer_prev;
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static uint8_t error_dir;
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usbh_status status;
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usb_urb_state URB_Status = URB_IDLE;
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if (pudev->host.connect_status) {
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switch (msc_botxfer_param.bot_state) {
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case USBH_MSC_SEND_CBW:
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/* send CBW */
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usbh_data_send (pudev,
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&msc_cbw_data.CBWArray[0],
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msc_machine.hc_num_out,
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BBB_CBW_LENGTH);
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msc_botxfer_param.bot_state_bkp = USBH_MSC_SEND_CBW;
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msc_botxfer_param.bot_state = USBH_MSC_SENT_CBW;
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break;
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case USBH_MSC_SENT_CBW:
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URB_Status = usbh_urbstate_get(pudev, msc_machine.hc_num_out);
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if (URB_Status == URB_DONE) {
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bot_stall_error_count = 0;
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msc_botxfer_param.bot_state_bkp = USBH_MSC_SENT_CBW;
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/* if the CBW packet is sent successful, then change the state */
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xfer_dir = (msc_cbw_data.field.bmCBWFlags & USB_TRX_MASK);
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if (msc_cbw_data.field.dCBWDataTransferLength != 0) {
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remain_len = msc_cbw_data.field.dCBWDataTransferLength;
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data_pointer = msc_botxfer_param.xfer_buf;
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data_pointer_prev = data_pointer;
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/* if there is data transfer stage */
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if (xfer_dir == USB_TRX_IN) {
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/* data direction is IN */
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msc_botxfer_param.bot_state = USBH_MSC_BOT_DATAIN_STATE;
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} else {
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/* data direction is OUT */
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msc_botxfer_param.bot_state = USBH_MSC_BOT_DATAOUT_STATE;
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}
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} else {
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/* If there is NO Data Transfer Stage */
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msc_botxfer_param.bot_state = USBH_MSC_RECEIVE_CSW_STATE;
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}
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} else if (URB_Status == URB_NOTREADY) {
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msc_botxfer_param.bot_state = msc_botxfer_param.bot_state_bkp;
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} else if (URB_Status == URB_STALL) {
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error_dir = USBH_MSC_DIR_OUT;
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msc_botxfer_param.bot_state = USBH_MSC_BOT_ERROR_OUT;
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}
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break;
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case USBH_MSC_BOT_DATAIN_STATE:
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URB_Status = usbh_urbstate_get(pudev, msc_machine.hc_num_in);
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/* BOT DATA IN stage */
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if ((URB_Status == URB_DONE) ||
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(msc_botxfer_param.bot_state_bkp != USBH_MSC_BOT_DATAIN_STATE)) {
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bot_stall_error_count = 0;
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msc_botxfer_param.bot_state_bkp = USBH_MSC_BOT_DATAIN_STATE;
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if (remain_len > msc_machine.msc_bulk_epinsize) {
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usbh_data_recev (pudev,
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data_pointer,
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msc_machine.hc_num_in,
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msc_machine.msc_bulk_epinsize);
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remain_len -= msc_machine.msc_bulk_epinsize;
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data_pointer = data_pointer + msc_machine.msc_bulk_epinsize;
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} else if (remain_len == 0) {
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/* if value was 0, and successful transfer, then change the state */
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msc_botxfer_param.bot_state = USBH_MSC_RECEIVE_CSW_STATE;
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} else {
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usbh_data_recev (pudev,
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data_pointer,
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msc_machine.hc_num_in,
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remain_len);
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remain_len = 0; /* reset this value and keep in same state */
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}
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} else if(URB_Status == URB_STALL) {
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/* this is data stage stall condition */
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error_dir = USBH_MSC_DIR_IN;
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msc_botxfer_param.bot_state = USBH_MSC_BOT_ERROR_IN;
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/* Refer to USB Mass-Storage Class : BOT (www.usb.org)
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6.7.2 Host expects to receive data from the device
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3. On a STALL condition receiving data, then:
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The host shall accept the data received.
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The host shall clear the Bulk-In pipe.
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4. The host shall attempt to receive a CSW.
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msc_botxfer_param.bot_state_bkp is used to switch to the Original
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state after the ClearFeature Command is issued.
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*/
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msc_botxfer_param.bot_state_bkp = USBH_MSC_RECEIVE_CSW_STATE;
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}
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break;
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case USBH_MSC_BOT_DATAOUT_STATE:
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/* BOT DATA OUT stage */
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URB_Status = usbh_urbstate_get(pudev, msc_machine.hc_num_out);
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if (URB_Status == URB_DONE) {
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bot_stall_error_count = 0;
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msc_botxfer_param.bot_state_bkp = USBH_MSC_BOT_DATAOUT_STATE;
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if (remain_len > msc_machine.msc_bulk_epoutsize) {
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usbh_data_send (pudev,
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data_pointer,
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msc_machine.hc_num_out,
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msc_machine.msc_bulk_epoutsize);
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data_pointer_prev = data_pointer;
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data_pointer = data_pointer + msc_machine.msc_bulk_epoutsize;
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remain_len = remain_len - msc_machine.msc_bulk_epoutsize;
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} else if (remain_len == 0) {
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/* if value was 0, and successful transfer, then change the state */
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msc_botxfer_param.bot_state = USBH_MSC_RECEIVE_CSW_STATE;
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} else {
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usbh_data_send (pudev,
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data_pointer,
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msc_machine.hc_num_out,
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remain_len);
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remain_len = 0; /* reset this value and keep in same state */
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}
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} else if (URB_Status == URB_NOTREADY) {
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if (data_pointer != data_pointer_prev) {
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usbh_data_send (pudev,
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(data_pointer - msc_machine.msc_bulk_epoutsize),
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msc_machine.hc_num_out,
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msc_machine.msc_bulk_epoutsize);
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} else {
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usbh_data_send (pudev,
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data_pointer,
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msc_machine.hc_num_out,
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msc_machine.msc_bulk_epoutsize);
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}
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} else if (URB_Status == URB_STALL) {
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error_dir = USBH_MSC_DIR_OUT;
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msc_botxfer_param.bot_state = USBH_MSC_BOT_ERROR_OUT;
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/* Refer to USB Mass-Storage Class : BOT (www.usb.org)
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6.7.3 Ho - Host expects to send data to the device
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3. On a STALL condition sending data, then:
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" The host shall clear the Bulk-Out pipe.
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4. The host shall attempt to receive a CSW.
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The Above statement will do the clear the Bulk-Out pipe.
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The Below statement will help in Getting the CSW.
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msc_botxfer_param.bot_state_bkp is used to switch to the Original
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state after the ClearFeature Command is issued.
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*/
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msc_botxfer_param.bot_state_bkp = USBH_MSC_RECEIVE_CSW_STATE;
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}
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break;
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case USBH_MSC_RECEIVE_CSW_STATE:
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/* BOT CSW stage */
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/* NOTE: We cannot reset the BOTStallErrorCount here as it may come from the clearFeature from previous command */
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msc_botxfer_param.bot_state_bkp = USBH_MSC_RECEIVE_CSW_STATE;
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msc_botxfer_param.xfer_buf = msc_csw_data.CSWArray;
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msc_botxfer_param.data_len = USBH_MSC_CSW_MAX_LENGTH;
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for (index = BBB_CSW_LENGTH; index != 0; index--) {
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msc_csw_data.CSWArray[index] = 0;
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}
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msc_csw_data.CSWArray[0] = 0;
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usbh_data_recev (pudev,
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msc_botxfer_param.xfer_buf,
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msc_machine.hc_num_in,
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USBH_MSC_CSW_MAX_LENGTH);
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msc_botxfer_param.bot_state = USBH_MSC_DECODE_CSW;
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break;
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case USBH_MSC_DECODE_CSW:
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URB_Status = usbh_urbstate_get(pudev, msc_machine.hc_num_in);
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/* decode CSW */
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if (URB_Status == URB_DONE) {
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bot_stall_error_count = 0;
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msc_botxfer_param.bot_state_bkp = USBH_MSC_RECEIVE_CSW_STATE;
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msc_botxfer_param.msc_state = msc_botxfer_param.msc_state_current ;
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msc_botxfer_param.bot_xfer_status = usbh_msc_csw_decode (pudev , puhost);
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} else if (URB_Status == URB_STALL) {
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error_dir = USBH_MSC_DIR_IN;
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msc_botxfer_param.bot_state = USBH_MSC_BOT_ERROR_IN;
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}
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break;
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case USBH_MSC_BOT_ERROR_IN:
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status = usbh_msc_bot_abort(pudev, puhost, USBH_MSC_DIR_IN);
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if (status == USBH_OK) {
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/* check if the error was due in both the directions */
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if (error_dir == USBH_MSC_BOTH_DIR) {
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/* if both directions are needed, switch to OUT direction */
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msc_botxfer_param.bot_state = USBH_MSC_BOT_ERROR_OUT;
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} else {
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/* switch back to the original state, in many cases this will be USBH_MSC_RECEIVE_CSW_STATE state */
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msc_botxfer_param.bot_state = msc_botxfer_param.bot_state_bkp;
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}
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} else if (status == USBH_UNRECOVERED_ERROR) {
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/* this means that there is a stall error limit, do reset recovery */
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msc_botxfer_param.bot_xfer_status = USBH_MSC_PHASE_ERROR;
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}
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break;
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case USBH_MSC_BOT_ERROR_OUT:
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status = usbh_msc_bot_abort (pudev, puhost, USBH_MSC_DIR_OUT);
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if (status == USBH_OK) {
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/* switch back to the original state */
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msc_botxfer_param.bot_state = msc_botxfer_param.bot_state_bkp;
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} else if (status == USBH_UNRECOVERED_ERROR) {
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/* this means that there is a stall error limit, do reset recovery */
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msc_botxfer_param.bot_xfer_status = USBH_MSC_PHASE_ERROR;
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}
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break;
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default:
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break;
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}
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}
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}
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/*!
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||
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\brief manages the different error handling for stall
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||
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\param[in] pudev: pointer to usb core instance
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||
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\param[in] puhost: pointer to usb host
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||
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\param[in] direction: data IN or OUT
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\param[out] none
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||
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\retval none
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||
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*/
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||
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usbh_status usbh_msc_bot_abort (usb_core_driver *pudev, usbh_host *puhost, uint8_t direction)
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||
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{
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usbh_status status = USBH_BUSY;
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switch (direction) {
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case USBH_MSC_DIR_IN :
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/* send clrfeture command on bulk IN endpoint */
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||
|
|
status = usbh_clrfeature(pudev,
|
||
|
|
puhost,
|
||
|
|
msc_machine.msc_bulk_epin,
|
||
|
|
msc_machine.hc_num_in);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case USBH_MSC_DIR_OUT :
|
||
|
|
/*send clrfeature command on bulk OUT endpoint */
|
||
|
|
status = usbh_clrfeature(pudev,
|
||
|
|
puhost,
|
||
|
|
msc_machine.msc_bulk_epout,
|
||
|
|
msc_machine.hc_num_out);
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
bot_stall_error_count++; /* check continous number of times, stall has occured */
|
||
|
|
|
||
|
|
if (bot_stall_error_count > MAX_BULK_STALL_COUNT_LIMIT) {
|
||
|
|
status = USBH_UNRECOVERED_ERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
\brief decode the CSW received by the device and updates the same to upper layer
|
||
|
|
\param[in] pudev: pointer to usb core instance
|
||
|
|
\param[in] puhost: pointer to usb host
|
||
|
|
\param[out] none
|
||
|
|
\retval on success USBH_MSC_OK, on failure USBH_MSC_FAIL
|
||
|
|
\notes
|
||
|
|
Refer to USB Mass-Storage Class: BOT (www.usb.org)
|
||
|
|
6.3.1 Valid CSW Conditions :
|
||
|
|
The host shall consider the CSW valid when:
|
||
|
|
1. dCSWSignature is equal to 53425355h
|
||
|
|
2. the CSW is 13 (Dh) bytes in length,
|
||
|
|
3. dCSWTag matches the dCBWTag from the corresponding CBW.
|
||
|
|
*/
|
||
|
|
uint8_t usbh_msc_csw_decode (usb_core_driver *pudev, usbh_host *puhost)
|
||
|
|
{
|
||
|
|
uint8_t status;
|
||
|
|
uint32_t data_xfercount = 0;
|
||
|
|
|
||
|
|
status = USBH_MSC_FAIL;
|
||
|
|
|
||
|
|
if (pudev->host.connect_status) {
|
||
|
|
/* checking if the transfer length is diffrent than 13 */
|
||
|
|
data_xfercount = usbh_xfercount_get (pudev, msc_machine.hc_num_in);
|
||
|
|
|
||
|
|
if (data_xfercount != BBB_CSW_LENGTH) {
|
||
|
|
/* (4) Hi > Dn (Host expects to receive data from the device,
|
||
|
|
Device intends to transfer no data)
|
||
|
|
(5) Hi > Di (Host expects to receive data from the device,
|
||
|
|
Device intends to send data to the host)
|
||
|
|
(9) Ho > Dn (Host expects to send data to the device,
|
||
|
|
Device intends to transfer no data)
|
||
|
|
(11) Ho > Do (Host expects to send data to the device,
|
||
|
|
Device intends to receive data from the host)
|
||
|
|
*/
|
||
|
|
|
||
|
|
status = USBH_MSC_PHASE_ERROR;
|
||
|
|
} else {
|
||
|
|
/* CSW length is correct */
|
||
|
|
|
||
|
|
/* check validity of the CSW Signature and CSWStatus */
|
||
|
|
if (msc_csw_data.field.dCSWSignature == BBB_CSW_SIGNATURE) {
|
||
|
|
/* check condition 1. dCSWSignature is equal to 53425355h */
|
||
|
|
if (msc_csw_data.field.dCSWTag == msc_cbw_data.field.dCBWTag) {
|
||
|
|
/* check condition 3. dCSWTag matches the dCBWTag from the corresponding CBW */
|
||
|
|
if (msc_csw_data.field.bCSWStatus == USBH_MSC_OK) {
|
||
|
|
/* refer to USB Mass-Storage Class : BOT (www.usb.org)
|
||
|
|
Hn Host expects no data transfers
|
||
|
|
Hi Host expects to receive data from the device
|
||
|
|
Ho Host expects to send data to the device
|
||
|
|
|
||
|
|
Dn Device intends to transfer no data
|
||
|
|
Di Device intends to send data to the host
|
||
|
|
Do Device intends to receive data from the host
|
||
|
|
|
||
|
|
Section 6.7
|
||
|
|
(1) Hn = Dn (Host expects no data transfers,
|
||
|
|
Device intends to transfer no data)
|
||
|
|
(6) Hi = Di (Host expects to receive data from the device,
|
||
|
|
Device intends to send data to the host)
|
||
|
|
(12) Ho = Do (Host expects to send data to the device,
|
||
|
|
Device intends to receive data from the host)
|
||
|
|
*/
|
||
|
|
|
||
|
|
status = USBH_MSC_OK;
|
||
|
|
} else if (msc_csw_data.field.bCSWStatus == USBH_MSC_FAIL) {
|
||
|
|
status = USBH_MSC_FAIL;
|
||
|
|
} else if(msc_csw_data.field.bCSWStatus == USBH_MSC_PHASE_ERROR) {
|
||
|
|
/* refer to USB Mass-Storage Class : BOT (www.usb.org)
|
||
|
|
Section 6.7
|
||
|
|
(2) Hn < Di ( Host expects no data transfers,
|
||
|
|
Device intends to send data to the host)
|
||
|
|
(3) Hn < Do ( Host expects no data transfers,
|
||
|
|
Device intends to receive data from the host)
|
||
|
|
(7) Hi < Di ( Host expects to receive data from the device,
|
||
|
|
Device intends to send data to the host)
|
||
|
|
(8) Hi <> Do ( Host expects to receive data from the device,
|
||
|
|
Device intends to receive data from the host)
|
||
|
|
(10) Ho <> Di (Host expects to send data to the device,
|
||
|
|
Di Device intends to send data to the host)
|
||
|
|
(13) Ho < Do (Host expects to send data to the device,
|
||
|
|
Device intends to receive data from the host)
|
||
|
|
*/
|
||
|
|
|
||
|
|
status = USBH_MSC_PHASE_ERROR;
|
||
|
|
}
|
||
|
|
} /* CSW tag matching is checked */
|
||
|
|
} /* CSW signature correct checking */else {
|
||
|
|
/* If the CSW signature is not valid, we sall return the phase error to
|
||
|
|
upper layers for reset recovery */
|
||
|
|
status = USBH_MSC_PHASE_ERROR;
|
||
|
|
}
|
||
|
|
} /* CSW length check */
|
||
|
|
}
|
||
|
|
|
||
|
|
msc_botxfer_param.bot_xfer_status = status;
|
||
|
|
|
||
|
|
return status;
|
||
|
|
}
|