diff options
Diffstat (limited to 'tinyusb/src/class/msc/msc_device.c')
| -rwxr-xr-x | tinyusb/src/class/msc/msc_device.c | 705 |
1 files changed, 0 insertions, 705 deletions
diff --git a/tinyusb/src/class/msc/msc_device.c b/tinyusb/src/class/msc/msc_device.c deleted file mode 100755 index 014e8b69..00000000 --- a/tinyusb/src/class/msc/msc_device.c +++ /dev/null @@ -1,705 +0,0 @@ -/* - * The MIT License (MIT) - * - * Copyright (c) 2019 Ha Thach (tinyusb.org) - * - * 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. - * - * This file is part of the TinyUSB stack. - */ - -#include "tusb_option.h" - -#if (TUSB_OPT_DEVICE_ENABLED && CFG_TUD_MSC) - -#include "device/usbd.h" -#include "device/usbd_pvt.h" -#include "device/dcd.h" // for faking dcd_event_xfer_complete - -#include "msc_device.h" - -//--------------------------------------------------------------------+ -// MACRO CONSTANT TYPEDEF -//--------------------------------------------------------------------+ - -// Can be selectively disabled to reduce logging when troubleshooting other driver -#define MSC_DEBUG 2 - -enum -{ - MSC_STAGE_CMD = 0, - MSC_STAGE_DATA, - MSC_STAGE_STATUS, - MSC_STAGE_STATUS_SENT -}; - -typedef struct -{ - // TODO optimize alignment - CFG_TUSB_MEM_ALIGN msc_cbw_t cbw; - CFG_TUSB_MEM_ALIGN msc_csw_t csw; - - uint8_t itf_num; - uint8_t ep_in; - uint8_t ep_out; - - // Bulk Only Transfer (BOT) Protocol - uint8_t stage; - uint32_t total_len; - uint32_t xferred_len; // numbered of bytes transferred so far in the Data Stage - - // Sense Response Data - uint8_t sense_key; - uint8_t add_sense_code; - uint8_t add_sense_qualifier; -}mscd_interface_t; - -CFG_TUSB_MEM_SECTION CFG_TUSB_MEM_ALIGN static mscd_interface_t _mscd_itf; -CFG_TUSB_MEM_SECTION CFG_TUSB_MEM_ALIGN static uint8_t _mscd_buf[CFG_TUD_MSC_EP_BUFSIZE]; - -//--------------------------------------------------------------------+ -// INTERNAL OBJECT & FUNCTION DECLARATION -//--------------------------------------------------------------------+ -static int32_t proc_builtin_scsi(uint8_t lun, uint8_t const scsi_cmd[16], uint8_t* buffer, uint32_t bufsize); -static void proc_read10_cmd(uint8_t rhport, mscd_interface_t* p_msc); -static void proc_write10_cmd(uint8_t rhport, mscd_interface_t* p_msc); - -static inline uint32_t rdwr10_get_lba(uint8_t const command[]) -{ - // use offsetof to avoid pointer to the odd/unaligned address - uint32_t const lba = tu_unaligned_read32(command + offsetof(scsi_write10_t, lba)); - - // lba is in Big Endian - return tu_ntohl(lba); -} - -static inline uint16_t rdwr10_get_blockcount(uint8_t const command[]) -{ - // use offsetof to avoid pointer to the odd/misaligned address - uint16_t const block_count = tu_unaligned_read16(command + offsetof(scsi_write10_t, block_count)); - - // block count is in Big Endian - return tu_ntohs(block_count); -} - -//--------------------------------------------------------------------+ -// Debug -//--------------------------------------------------------------------+ -#if CFG_TUSB_DEBUG >= 2 - -TU_ATTR_UNUSED static tu_lookup_entry_t const _msc_scsi_cmd_lookup[] = -{ - { .key = SCSI_CMD_TEST_UNIT_READY , .data = "Test Unit Ready" }, - { .key = SCSI_CMD_INQUIRY , .data = "Inquiry" }, - { .key = SCSI_CMD_MODE_SELECT_6 , .data = "Mode_Select 6" }, - { .key = SCSI_CMD_MODE_SENSE_6 , .data = "Mode_Sense 6" }, - { .key = SCSI_CMD_START_STOP_UNIT , .data = "Start Stop Unit" }, - { .key = SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL , .data = "Prevent Allow Medium Removal" }, - { .key = SCSI_CMD_READ_CAPACITY_10 , .data = "Read Capacity10" }, - { .key = SCSI_CMD_REQUEST_SENSE , .data = "Request Sense" }, - { .key = SCSI_CMD_READ_FORMAT_CAPACITY , .data = "Read Format Capacity" }, - { .key = SCSI_CMD_READ_10 , .data = "Read10" }, - { .key = SCSI_CMD_WRITE_10 , .data = "Write10" } -}; - -TU_ATTR_UNUSED static tu_lookup_table_t const _msc_scsi_cmd_table = -{ - .count = TU_ARRAY_SIZE(_msc_scsi_cmd_lookup), - .items = _msc_scsi_cmd_lookup -}; - -#endif - -//--------------------------------------------------------------------+ -// APPLICATION API -//--------------------------------------------------------------------+ -bool tud_msc_set_sense(uint8_t lun, uint8_t sense_key, uint8_t add_sense_code, uint8_t add_sense_qualifier) -{ - (void) lun; - - _mscd_itf.sense_key = sense_key; - _mscd_itf.add_sense_code = add_sense_code; - _mscd_itf.add_sense_qualifier = add_sense_qualifier; - - return true; -} - -//--------------------------------------------------------------------+ -// USBD Driver API -//--------------------------------------------------------------------+ -void mscd_init(void) -{ - tu_memclr(&_mscd_itf, sizeof(mscd_interface_t)); -} - -void mscd_reset(uint8_t rhport) -{ - (void) rhport; - tu_memclr(&_mscd_itf, sizeof(mscd_interface_t)); -} - -uint16_t mscd_open(uint8_t rhport, tusb_desc_interface_t const * itf_desc, uint16_t max_len) -{ - // only support SCSI's BOT protocol - TU_VERIFY(TUSB_CLASS_MSC == itf_desc->bInterfaceClass && - MSC_SUBCLASS_SCSI == itf_desc->bInterfaceSubClass && - MSC_PROTOCOL_BOT == itf_desc->bInterfaceProtocol, 0); - - // msc driver length is fixed - uint16_t const drv_len = sizeof(tusb_desc_interface_t) + 2*sizeof(tusb_desc_endpoint_t); - - // Max length mus be at least 1 interface + 2 endpoints - TU_ASSERT(max_len >= drv_len, 0); - - mscd_interface_t * p_msc = &_mscd_itf; - p_msc->itf_num = itf_desc->bInterfaceNumber; - - // Open endpoint pair - TU_ASSERT( usbd_open_edpt_pair(rhport, tu_desc_next(itf_desc), 2, TUSB_XFER_BULK, &p_msc->ep_out, &p_msc->ep_in), 0 ); - - // Prepare for Command Block Wrapper - if ( !usbd_edpt_xfer(rhport, p_msc->ep_out, (uint8_t*) &p_msc->cbw, sizeof(msc_cbw_t)) ) - { - TU_LOG_FAILED(); - TU_BREAKPOINT(); - } - - return drv_len; -} - -// Invoked when a control transfer occurred on an interface of this class -// Driver response accordingly to the request and the transfer stage (setup/data/ack) -// return false to stall control endpoint (e.g unsupported request) -bool mscd_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t const * p_request) -{ - // nothing to do with DATA & ACK stage - if (stage != CONTROL_STAGE_SETUP) return true; - - // Handle class request only - TU_VERIFY(p_request->bmRequestType_bit.type == TUSB_REQ_TYPE_CLASS); - - switch ( p_request->bRequest ) - { - case MSC_REQ_RESET: - // TODO: Actually reset interface. - tud_control_status(rhport, p_request); - break; - - case MSC_REQ_GET_MAX_LUN: - { - uint8_t maxlun = 1; - if (tud_msc_get_maxlun_cb) maxlun = tud_msc_get_maxlun_cb(); - TU_VERIFY(maxlun); - - // MAX LUN is minus 1 by specs - maxlun--; - - tud_control_xfer(rhport, p_request, &maxlun, 1); - } - break; - - default: return false; // stall unsupported request - } - - return true; -} - -bool mscd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t xferred_bytes) -{ - mscd_interface_t* p_msc = &_mscd_itf; - msc_cbw_t const * p_cbw = &p_msc->cbw; - msc_csw_t * p_csw = &p_msc->csw; - - switch (p_msc->stage) - { - case MSC_STAGE_CMD: - //------------- new CBW received -------------// - // Complete IN while waiting for CMD is usually Status of previous SCSI op, ignore it - if(ep_addr != p_msc->ep_out) return true; - - TU_ASSERT( event == XFER_RESULT_SUCCESS && - xferred_bytes == sizeof(msc_cbw_t) && p_cbw->signature == MSC_CBW_SIGNATURE ); - - TU_LOG(MSC_DEBUG, " SCSI Command: %s\r\n", tu_lookup_find(&_msc_scsi_cmd_table, p_cbw->command[0])); - // TU_LOG_MEM(MSC_DEBUG, p_cbw, xferred_bytes, 2); - - p_csw->signature = MSC_CSW_SIGNATURE; - p_csw->tag = p_cbw->tag; - p_csw->data_residue = 0; - - /*------------- Parse command and prepare DATA -------------*/ - p_msc->stage = MSC_STAGE_DATA; - p_msc->total_len = p_cbw->total_bytes; - p_msc->xferred_len = 0; - - if (SCSI_CMD_READ_10 == p_cbw->command[0]) - { - proc_read10_cmd(rhport, p_msc); - } - else if (SCSI_CMD_WRITE_10 == p_cbw->command[0]) - { - proc_write10_cmd(rhport, p_msc); - } - else - { - // For other SCSI commands - // 1. OUT : queue transfer (invoke app callback after done) - // 2. IN & Zero: Process if is built-in, else Invoke app callback. Skip DATA if zero length - if ( (p_cbw->total_bytes > 0 ) && !tu_bit_test(p_cbw->dir, 7) ) - { - // queue transfer - TU_ASSERT( usbd_edpt_xfer(rhport, p_msc->ep_out, _mscd_buf, p_msc->total_len) ); - }else - { - int32_t resplen; - - // First process if it is a built-in commands - resplen = proc_builtin_scsi(p_cbw->lun, p_cbw->command, _mscd_buf, sizeof(_mscd_buf)); - - // Not built-in, invoke user callback - if ( (resplen < 0) && (p_msc->sense_key == 0) ) - { - resplen = tud_msc_scsi_cb(p_cbw->lun, p_cbw->command, _mscd_buf, p_msc->total_len); - } - - if ( resplen < 0 ) - { - p_msc->total_len = 0; - p_csw->status = MSC_CSW_STATUS_FAILED; - p_msc->stage = MSC_STAGE_STATUS; - - // failed but senskey is not set: default to Illegal Request - if ( p_msc->sense_key == 0 ) tud_msc_set_sense(p_cbw->lun, SCSI_SENSE_ILLEGAL_REQUEST, 0x20, 0x00); - - // Stall bulk In if needed - if (p_cbw->total_bytes) usbd_edpt_stall(rhport, p_msc->ep_in); - } - else - { - p_msc->total_len = (uint32_t) resplen; - p_csw->status = MSC_CSW_STATUS_PASSED; - - if (p_msc->total_len) - { - TU_ASSERT( p_cbw->total_bytes >= p_msc->total_len ); // cannot return more than host expect - TU_ASSERT( usbd_edpt_xfer(rhport, p_msc->ep_in, _mscd_buf, p_msc->total_len) ); - }else - { - p_msc->stage = MSC_STAGE_STATUS; - } - } - } - } - break; - - case MSC_STAGE_DATA: - TU_LOG(MSC_DEBUG, " SCSI Data\r\n"); - //TU_LOG_MEM(MSC_DEBUG, _mscd_buf, xferred_bytes, 2); - - // OUT transfer, invoke callback if needed - if ( !tu_bit_test(p_cbw->dir, 7) ) - { - if ( SCSI_CMD_WRITE_10 != p_cbw->command[0] ) - { - int32_t cb_result = tud_msc_scsi_cb(p_cbw->lun, p_cbw->command, _mscd_buf, p_msc->total_len); - - if ( cb_result < 0 ) - { - p_csw->status = MSC_CSW_STATUS_FAILED; - tud_msc_set_sense(p_cbw->lun, SCSI_SENSE_ILLEGAL_REQUEST, 0x20, 0x00); // Sense = Invalid Command Operation - }else - { - p_csw->status = MSC_CSW_STATUS_PASSED; - } - } - else - { - uint16_t const block_sz = p_cbw->total_bytes / rdwr10_get_blockcount(p_cbw->command); - - // Adjust lba with transferred bytes - uint32_t const lba = rdwr10_get_lba(p_cbw->command) + (p_msc->xferred_len / block_sz); - - // Application can consume smaller bytes - int32_t nbytes = tud_msc_write10_cb(p_cbw->lun, lba, p_msc->xferred_len % block_sz, _mscd_buf, xferred_bytes); - - if ( nbytes < 0 ) - { - // negative means error -> skip to status phase, status in CSW set to failed - p_csw->data_residue = p_cbw->total_bytes - p_msc->xferred_len; - p_csw->status = MSC_CSW_STATUS_FAILED; - p_msc->stage = MSC_STAGE_STATUS; - - tud_msc_set_sense(p_cbw->lun, SCSI_SENSE_ILLEGAL_REQUEST, 0x20, 0x00); // Sense = Invalid Command Operation - break; - }else - { - // Application consume less than what we got (including zero) - if ( nbytes < (int32_t) xferred_bytes ) - { - if ( nbytes > 0 ) - { - p_msc->xferred_len += nbytes; - memmove(_mscd_buf, _mscd_buf+nbytes, xferred_bytes-nbytes); - } - - // simulate an transfer complete with adjusted parameters --> this driver callback will fired again - dcd_event_xfer_complete(rhport, p_msc->ep_out, xferred_bytes-nbytes, XFER_RESULT_SUCCESS, false); - - return true; // skip the rest - } - else - { - // Application consume all bytes in our buffer. Nothing to do, process with normal flow - } - } - } - } - - // Accumulate data so far - p_msc->xferred_len += xferred_bytes; - - if ( p_msc->xferred_len >= p_msc->total_len ) - { - // Data Stage is complete - p_msc->stage = MSC_STAGE_STATUS; - } - else - { - // READ10 & WRITE10 Can be executed with large bulk of data e.g write 8K bytes (several flash write) - // We break it into multiple smaller command whose data size is up to CFG_TUD_MSC_EP_BUFSIZE - if (SCSI_CMD_READ_10 == p_cbw->command[0]) - { - proc_read10_cmd(rhport, p_msc); - } - else if (SCSI_CMD_WRITE_10 == p_cbw->command[0]) - { - proc_write10_cmd(rhport, p_msc); - }else - { - // No other command take more than one transfer yet -> unlikely error - TU_BREAKPOINT(); - } - } - break; - - case MSC_STAGE_STATUS: - // processed immediately after this switch, supposedly to be empty - break; - - case MSC_STAGE_STATUS_SENT: - // Wait for the Status phase to complete - if( (ep_addr == p_msc->ep_in) && (xferred_bytes == sizeof(msc_csw_t)) ) - { - TU_LOG(MSC_DEBUG, " SCSI Status: %u\r\n", p_csw->status); - // TU_LOG_MEM(MSC_DEBUG, p_csw, xferred_bytes, 2); - - // Invoke complete callback if defined - // Note: There is racing issue with samd51 + qspi flash testing with arduino - // if complete_cb() is invoked after queuing the status. - switch(p_cbw->command[0]) - { - case SCSI_CMD_READ_10: - if ( tud_msc_read10_complete_cb ) tud_msc_read10_complete_cb(p_cbw->lun); - break; - - case SCSI_CMD_WRITE_10: - if ( tud_msc_write10_complete_cb ) tud_msc_write10_complete_cb(p_cbw->lun); - break; - - default: - if ( tud_msc_scsi_complete_cb ) tud_msc_scsi_complete_cb(p_cbw->lun, p_cbw->command); - break; - } - - // Move to default CMD stage - p_msc->stage = MSC_STAGE_CMD; - - // Queue for the next CBW - TU_ASSERT( usbd_edpt_xfer(rhport, p_msc->ep_out, (uint8_t*) &p_msc->cbw, sizeof(msc_cbw_t)) ); - } - break; - - default : break; - } - - if ( p_msc->stage == MSC_STAGE_STATUS ) - { - // Either endpoints is stalled, need to wait until it is cleared by host - if ( usbd_edpt_stalled(rhport, p_msc->ep_in) || usbd_edpt_stalled(rhport, p_msc->ep_out) ) - { - // simulate an transfer complete with adjusted parameters --> this driver callback will fired again - // and response with status phase after halted endpoints are cleared. - // note: use ep_out to prevent confusing with STATUS complete - dcd_event_xfer_complete(rhport, p_msc->ep_out, 0, XFER_RESULT_SUCCESS, false); - } - else - { - // Move to Status Sent stage - p_msc->stage = MSC_STAGE_STATUS_SENT; - - // Send SCSI Status - TU_ASSERT(usbd_edpt_xfer(rhport, p_msc->ep_in , (uint8_t*) &p_msc->csw, sizeof(msc_csw_t))); - } - } - - return true; -} - -/*------------------------------------------------------------------*/ -/* SCSI Command Process - *------------------------------------------------------------------*/ - -// return response's length (copied to buffer). Negative if it is not an built-in command or indicate Failed status (CSW) -// In case of a failed status, sense key must be set for reason of failure -static int32_t proc_builtin_scsi(uint8_t lun, uint8_t const scsi_cmd[16], uint8_t* buffer, uint32_t bufsize) -{ - (void) bufsize; // TODO refractor later - int32_t resplen; - - switch ( scsi_cmd[0] ) - { - case SCSI_CMD_TEST_UNIT_READY: - resplen = 0; - if ( !tud_msc_test_unit_ready_cb(lun) ) - { - // Failed status response - resplen = - 1; - - // If sense key is not set by callback, default to Logical Unit Not Ready, Cause Not Reportable - if ( _mscd_itf.sense_key == 0 ) tud_msc_set_sense(lun, SCSI_SENSE_NOT_READY, 0x04, 0x00); - } - break; - - case SCSI_CMD_START_STOP_UNIT: - resplen = 0; - - if (tud_msc_start_stop_cb) - { - scsi_start_stop_unit_t const * start_stop = (scsi_start_stop_unit_t const *) scsi_cmd; - if ( !tud_msc_start_stop_cb(lun, start_stop->power_condition, start_stop->start, start_stop->load_eject) ) - { - // Failed status response - resplen = - 1; - - // If sense key is not set by callback, default to Logical Unit Not Ready, Cause Not Reportable - if ( _mscd_itf.sense_key == 0 ) tud_msc_set_sense(lun, SCSI_SENSE_NOT_READY, 0x04, 0x00); - } - } - break; - - case SCSI_CMD_READ_CAPACITY_10: - { - uint32_t block_count; - uint32_t block_size; - uint16_t block_size_u16; - - tud_msc_capacity_cb(lun, &block_count, &block_size_u16); - block_size = (uint32_t) block_size_u16; - - // Invalid block size/count from callback, possibly unit is not ready - // stall this request, set sense key to NOT READY - if (block_count == 0 || block_size == 0) - { - resplen = -1; - - // If sense key is not set by callback, default to Logical Unit Not Ready, Cause Not Reportable - if ( _mscd_itf.sense_key == 0 ) tud_msc_set_sense(lun, SCSI_SENSE_NOT_READY, 0x04, 0x00); - }else - { - scsi_read_capacity10_resp_t read_capa10; - - read_capa10.last_lba = tu_htonl(block_count-1); - read_capa10.block_size = tu_htonl(block_size); - - resplen = sizeof(read_capa10); - memcpy(buffer, &read_capa10, resplen); - } - } - break; - - case SCSI_CMD_READ_FORMAT_CAPACITY: - { - scsi_read_format_capacity_data_t read_fmt_capa = - { - .list_length = 8, - .block_num = 0, - .descriptor_type = 2, // formatted media - .block_size_u16 = 0 - }; - - uint32_t block_count; - uint16_t block_size; - - tud_msc_capacity_cb(lun, &block_count, &block_size); - - // Invalid block size/count from callback, possibly unit is not ready - // stall this request, set sense key to NOT READY - if (block_count == 0 || block_size == 0) - { - resplen = -1; - - // If sense key is not set by callback, default to Logical Unit Not Ready, Cause Not Reportable - if ( _mscd_itf.sense_key == 0 ) tud_msc_set_sense(lun, SCSI_SENSE_NOT_READY, 0x04, 0x00); - }else - { - read_fmt_capa.block_num = tu_htonl(block_count); - read_fmt_capa.block_size_u16 = tu_htons(block_size); - - resplen = sizeof(read_fmt_capa); - memcpy(buffer, &read_fmt_capa, resplen); - } - } - break; - - case SCSI_CMD_INQUIRY: - { - scsi_inquiry_resp_t inquiry_rsp = - { - .is_removable = 1, - .version = 2, - .response_data_format = 2, - }; - - // vendor_id, product_id, product_rev is space padded string - memset(inquiry_rsp.vendor_id , ' ', sizeof(inquiry_rsp.vendor_id)); - memset(inquiry_rsp.product_id , ' ', sizeof(inquiry_rsp.product_id)); - memset(inquiry_rsp.product_rev, ' ', sizeof(inquiry_rsp.product_rev)); - - tud_msc_inquiry_cb(lun, inquiry_rsp.vendor_id, inquiry_rsp.product_id, inquiry_rsp.product_rev); - - resplen = sizeof(inquiry_rsp); - memcpy(buffer, &inquiry_rsp, resplen); - } - break; - - case SCSI_CMD_MODE_SENSE_6: - { - scsi_mode_sense6_resp_t mode_resp = - { - .data_len = 3, - .medium_type = 0, - .write_protected = false, - .reserved = 0, - .block_descriptor_len = 0 // no block descriptor are included - }; - - bool writable = true; - if (tud_msc_is_writable_cb) { - writable = tud_msc_is_writable_cb(lun); - } - mode_resp.write_protected = !writable; - - resplen = sizeof(mode_resp); - memcpy(buffer, &mode_resp, resplen); - } - break; - - case SCSI_CMD_REQUEST_SENSE: - { - scsi_sense_fixed_resp_t sense_rsp = - { - .response_code = 0x70, - .valid = 1 - }; - - sense_rsp.add_sense_len = sizeof(scsi_sense_fixed_resp_t) - 8; - - sense_rsp.sense_key = _mscd_itf.sense_key; - sense_rsp.add_sense_code = _mscd_itf.add_sense_code; - sense_rsp.add_sense_qualifier = _mscd_itf.add_sense_qualifier; - - resplen = sizeof(sense_rsp); - memcpy(buffer, &sense_rsp, resplen); - - // Clear sense data after copy - tud_msc_set_sense(lun, 0, 0, 0); - } - break; - - default: resplen = -1; break; - } - - return resplen; -} - -static void proc_read10_cmd(uint8_t rhport, mscd_interface_t* p_msc) -{ - msc_cbw_t const * p_cbw = &p_msc->cbw; - msc_csw_t * p_csw = &p_msc->csw; - - uint16_t const block_cnt = rdwr10_get_blockcount(p_cbw->command); - TU_ASSERT(block_cnt, ); // prevent div by zero - - uint16_t const block_sz = p_cbw->total_bytes / block_cnt; - TU_ASSERT(block_sz, ); // prevent div by zero - - // Adjust lba with transferred bytes - uint32_t const lba = rdwr10_get_lba(p_cbw->command) + (p_msc->xferred_len / block_sz); - - // remaining bytes capped at class buffer - int32_t nbytes = (int32_t) tu_min32(sizeof(_mscd_buf), p_cbw->total_bytes-p_msc->xferred_len); - - // Application can consume smaller bytes - nbytes = tud_msc_read10_cb(p_cbw->lun, lba, p_msc->xferred_len % block_sz, _mscd_buf, (uint32_t) nbytes); - - if ( nbytes < 0 ) - { - // negative means error -> pipe is stalled & status in CSW set to failed - p_csw->data_residue = p_cbw->total_bytes - p_msc->xferred_len; - p_csw->status = MSC_CSW_STATUS_FAILED; - - tud_msc_set_sense(p_cbw->lun, SCSI_SENSE_ILLEGAL_REQUEST, 0x20, 0x00); // Sense = Invalid Command Operation - usbd_edpt_stall(rhport, p_msc->ep_in); - } - else if ( nbytes == 0 ) - { - // zero means not ready -> simulate an transfer complete so that this driver callback will fired again - dcd_event_xfer_complete(rhport, p_msc->ep_in, 0, XFER_RESULT_SUCCESS, false); - } - else - { - TU_ASSERT( usbd_edpt_xfer(rhport, p_msc->ep_in, _mscd_buf, nbytes), ); - } -} - -static void proc_write10_cmd(uint8_t rhport, mscd_interface_t* p_msc) -{ - msc_cbw_t const * p_cbw = &p_msc->cbw; - bool writable = true; - if (tud_msc_is_writable_cb) { - writable = tud_msc_is_writable_cb(p_cbw->lun); - } - if (!writable) { - msc_csw_t* p_csw = &p_msc->csw; - p_csw->data_residue = p_cbw->total_bytes; - p_csw->status = MSC_CSW_STATUS_FAILED; - - tud_msc_set_sense(p_cbw->lun, SCSI_SENSE_DATA_PROTECT, 0x27, 0x00); // Sense = Write protected - usbd_edpt_stall(rhport, p_msc->ep_out); - return; - } - - // remaining bytes capped at class buffer - int32_t nbytes = (int32_t) tu_min32(sizeof(_mscd_buf), p_cbw->total_bytes-p_msc->xferred_len); - - // Write10 callback will be called later when usb transfer complete - TU_ASSERT( usbd_edpt_xfer(rhport, p_msc->ep_out, _mscd_buf, nbytes), ); -} - -#endif |