mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-12-25 07:19:28 -05:00
287 lines
8.1 KiB
C
287 lines
8.1 KiB
C
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2023 Bernd Herzog
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "scsi.h"
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#include "diskio.h"
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volatile bool usb_bulk_block_done = false;
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void usb_bulk_block_cb(void* user_data, unsigned int bytes_transferred) {
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usb_bulk_block_done = true;
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(void)user_data;
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(void)bytes_transferred;
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}
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void usb_send_bulk(void* const data, const uint32_t maximum_length) {
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usb_bulk_block_done = false;
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usb_transfer_schedule_block(
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&usb_endpoint_bulk_in,
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data,
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maximum_length,
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usb_bulk_block_cb,
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NULL);
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while (!usb_bulk_block_done)
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;
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}
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void usb_receive_bulk(void* const data, const uint32_t maximum_length) {
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usb_bulk_block_done = false;
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usb_transfer_schedule_block(
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&usb_endpoint_bulk_out,
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data,
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maximum_length,
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usb_bulk_block_cb,
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NULL);
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while (!usb_bulk_block_done)
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;
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}
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void usb_send_csw(msd_cbw_t* msd_cbw_data, uint8_t status) {
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msd_csw_t csw = {
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.signature = MSD_CSW_SIGNATURE,
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.tag = msd_cbw_data->tag,
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.data_residue = 0,
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.status = status};
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memcpy(&usb_bulk_buffer[0], &csw, sizeof(msd_csw_t));
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usb_send_bulk(&usb_bulk_buffer[0], sizeof(msd_csw_t));
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}
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uint8_t handle_inquiry(msd_cbw_t* msd_cbw_data) {
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(void)msd_cbw_data;
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scsi_inquiry_response_t ret = {
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0x00, /* direct access block device */
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0x80, /* removable */
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0x00, // 0x04, /* SPC-2 */
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0x00, // 0x02, /* response data format */
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0x20, /* response has 0x20 + 4 bytes */
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0x00,
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0x00,
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0x00,
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"Mayhem",
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"Portapack MSD",
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{'v', '1', '.', '6'}};
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memcpy(&usb_bulk_buffer[0], &ret, sizeof(scsi_inquiry_response_t));
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usb_send_bulk(&usb_bulk_buffer[0], sizeof(scsi_inquiry_response_t));
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return 0;
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}
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uint8_t handle_inquiry_serial_number(msd_cbw_t* msd_cbw_data) {
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(void)msd_cbw_data;
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scsi_unit_serial_number_inquiry_response_t ret = {
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.peripheral = 0x00,
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.page_code = 0x80,
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.reserved = 0,
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.page_length = 0x08,
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.serialNumber = "Mayhem"};
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memcpy(&usb_bulk_buffer[0], &ret, sizeof(scsi_unit_serial_number_inquiry_response_t));
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usb_send_bulk(&usb_bulk_buffer[0], sizeof(scsi_unit_serial_number_inquiry_response_t));
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return 0;
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}
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uint8_t read_format_capacities(msd_cbw_t* msd_cbw_data) {
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uint16_t len = msd_cbw_data->cmd_data[7] << 8 | msd_cbw_data->cmd_data[8];
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if (len != 0) {
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size_t num_blocks = get_capacity();
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scsi_read_format_capacities_response_t ret = {
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.header = {0, 0, 0, 1 * 8 /* num_entries * 8 */},
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.blocknum = {((num_blocks) >> 24) & 0xff, ((num_blocks) >> 16) & 0xff, ((num_blocks) >> 8) & 0xff, num_blocks & 0xff},
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.blocklen = {0b10 /* formated */, 0, (512) >> 8, 0},
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};
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memcpy(&usb_bulk_buffer[0], &ret, sizeof(scsi_read_format_capacities_response_t));
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usb_send_bulk(&usb_bulk_buffer[0], sizeof(scsi_read_format_capacities_response_t));
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}
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return 0;
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}
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uint8_t read_capacity10(msd_cbw_t* msd_cbw_data) {
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(void)msd_cbw_data;
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size_t num_blocks = get_capacity();
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scsi_read_capacity10_response_t ret = {
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.last_block_addr = cpu_to_be32(num_blocks - 1),
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.block_size = cpu_to_be32(512)};
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memcpy(&usb_bulk_buffer[0], &ret, sizeof(scsi_read_capacity10_response_t));
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usb_send_bulk(&usb_bulk_buffer[0], sizeof(scsi_read_capacity10_response_t));
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return 0;
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}
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uint8_t request_sense(msd_cbw_t* msd_cbw_data) {
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(void)msd_cbw_data;
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scsi_sense_response_t ret = {
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.byte = {0x70, 0, SCSI_SENSE_KEY_GOOD, 0,
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0, 0, 0, 8,
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0, 0, 0, 0,
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SCSI_ASENSE_NO_ADDITIONAL_INFORMATION, SCSI_ASENSEQ_NO_QUALIFIER, 0, 0,
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0, 0}};
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memcpy(&usb_bulk_buffer[0], &ret, sizeof(scsi_sense_response_t));
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usb_send_bulk(&usb_bulk_buffer[0], sizeof(scsi_sense_response_t));
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return 0;
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}
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uint8_t mode_sense6(msd_cbw_t* msd_cbw_data) {
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(void)msd_cbw_data;
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scsi_mode_sense6_response_t ret = {
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.byte = {
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sizeof(scsi_mode_sense6_response_t) - 1,
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0,
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0,
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0}};
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memcpy(&usb_bulk_buffer[0], &ret, sizeof(scsi_mode_sense6_response_t));
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usb_send_bulk(&usb_bulk_buffer[0], sizeof(scsi_mode_sense6_response_t));
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return 0;
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}
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uint8_t mode_sense10(msd_cbw_t* msd_cbw_data) {
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(void)msd_cbw_data;
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scsi_mode_sense10_response_t ret = {
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.byte = {
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cpu_to_be16(sizeof(scsi_mode_sense6_response_t) - 2),
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0,
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0,
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0}};
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memcpy(&usb_bulk_buffer[0], &ret, sizeof(scsi_mode_sense10_response_t));
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usb_send_bulk(&usb_bulk_buffer[0], sizeof(scsi_mode_sense10_response_t));
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return 0;
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}
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static data_request_t decode_data_request(const uint8_t* cmd) {
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data_request_t req;
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uint32_t lba;
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uint16_t blk;
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memcpy(&lba, &cmd[2], sizeof(lba));
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memcpy(&blk, &cmd[7], sizeof(blk));
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req.first_lba = be32_to_cpu(lba);
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req.blk_cnt = be16_to_cpu(blk);
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return req;
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}
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uint8_t data_read10(msd_cbw_t* msd_cbw_data) {
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data_request_t req = decode_data_request(msd_cbw_data->cmd_data);
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for (size_t block_index = 0; block_index < req.blk_cnt; block_index++) {
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read_block(req.first_lba + block_index, &usb_bulk_buffer[0], 1 /* n blocks */);
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usb_send_bulk(&usb_bulk_buffer[0], 512);
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}
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return 0;
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}
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uint8_t data_write10(msd_cbw_t* msd_cbw_data) {
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data_request_t req = decode_data_request(msd_cbw_data->cmd_data);
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for (size_t block_index = 0; block_index < req.blk_cnt; block_index++) {
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usb_receive_bulk(&usb_bulk_buffer[0], 512);
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write_block(req.first_lba + block_index, &usb_bulk_buffer[0], 1 /* n blocks */);
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}
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return 0;
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}
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void scsi_command(msd_cbw_t* msd_cbw_data) {
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uint8_t status = 1;
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switch (msd_cbw_data->cmd_data[0]) {
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case SCSI_CMD_INQUIRY:
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if ((msd_cbw_data->cmd_data[1] & 0b1) && msd_cbw_data->cmd_data[2] == 0x80) {
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status = handle_inquiry_serial_number(msd_cbw_data);
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} else if ((msd_cbw_data->cmd_data[1] & 0b11) || msd_cbw_data->cmd_data[2] != 0) {
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status = 1;
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} else {
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status = handle_inquiry(msd_cbw_data);
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}
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break;
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case SCSI_CMD_REQUEST_SENSE:
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status = request_sense(msd_cbw_data);
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break;
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case SCSI_CMD_READ_CAPACITY_10:
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status = read_capacity10(msd_cbw_data);
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break;
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case SCSI_CMD_READ_10:
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status = data_read10(msd_cbw_data);
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break;
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case SCSI_CMD_WRITE_10:
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status = data_write10(msd_cbw_data);
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break;
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case SCSI_CMD_TEST_UNIT_READY:
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status = 0;
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break;
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case SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
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status = 0;
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break;
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case SCSI_CMD_MODE_SENSE_6:
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status = mode_sense6(msd_cbw_data);
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break;
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case SCSI_CMD_MODE_SENSE_10:
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status = mode_sense10(msd_cbw_data);
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break;
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case SCSI_CMD_READ_FORMAT_CAPACITIES:
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status = read_format_capacities(msd_cbw_data);
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break;
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case SCSI_CMD_VERIFY_10:
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status = 0;
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break;
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}
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usb_send_csw(msd_cbw_data, status);
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} |