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Move Mass Storage app to firmware repo

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Willy-JL
2024-02-20 06:11:51 +00:00
parent b58bcac1a2
commit 39bd3f4e6d
20 changed files with 1736 additions and 1 deletions
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266
applications/system/mass_storage/helpers/mass_storage_scsi.c Normal file
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#include "mass_storage_scsi.h"
#include <core/log.h>
#define TAG "MassStorageSCSI"
#define SCSI_TEST_UNIT_READY (0x00)
#define SCSI_REQUEST_SENSE (0x03)
#define SCSI_INQUIRY (0x12)
#define SCSI_READ_FORMAT_CAPACITIES (0x23)
#define SCSI_READ_CAPACITY_10 (0x25)
#define SCSI_MODE_SENSE_6 (0x1A)
#define SCSI_READ_10 (0x28)
#define SCSI_PREVENT_MEDIUM_REMOVAL (0x1E)
#define SCSI_START_STOP_UNIT (0x1B)
#define SCSI_WRITE_10 (0x2A)
bool scsi_cmd_start(SCSISession* scsi, uint8_t* cmd, uint8_t len) {
if(!len) {
scsi->sk = SCSI_SK_ILLEGAL_REQUEST;
scsi->asc = SCSI_ASC_INVALID_COMMAND_OPERATION_CODE;
return false;
}
FURI_LOG_T(TAG, "START %02X", cmd[0]);
scsi->cmd = cmd;
scsi->cmd_len = len;
scsi->rx_done = false;
scsi->tx_done = false;
switch(cmd[0]) {
case SCSI_WRITE_10: {
if(len < 10) return false;
scsi->write_10.lba = cmd[2] << 24 | cmd[3] << 16 | cmd[4] << 8 | cmd[5];
scsi->write_10.count = cmd[7] << 8 | cmd[8];
FURI_LOG_D(TAG, "SCSI_WRITE_10 %08lX %04X", scsi->write_10.lba, scsi->write_10.count);
return true;
}; break;
case SCSI_READ_10: {
if(len < 10) return false;
scsi->read_10.lba = cmd[2] << 24 | cmd[3] << 16 | cmd[4] << 8 | cmd[5];
scsi->read_10.count = cmd[7] << 8 | cmd[8];
FURI_LOG_D(TAG, "SCSI_READ_10 %08lX %04X", scsi->read_10.lba, scsi->read_10.count);
return true;
}; break;
}
return true;
}
bool scsi_cmd_rx_data(SCSISession* scsi, uint8_t* data, uint32_t len) {
FURI_LOG_T(TAG, "RX %02X len %lu", scsi->cmd[0], len);
if(scsi->rx_done) return false;
switch(scsi->cmd[0]) {
case SCSI_WRITE_10: {
uint32_t block_size = SCSI_BLOCK_SIZE;
uint16_t blocks = len / block_size;
bool result =
scsi->fn.write(scsi->fn.ctx, scsi->write_10.lba, blocks, data, blocks * block_size);
scsi->write_10.lba += blocks;
scsi->write_10.count -= blocks;
if(!scsi->write_10.count) {
scsi->rx_done = true;
}
return result;
}; break;
default: {
FURI_LOG_W(TAG, "unexpected scsi rx data cmd=%02X", scsi->cmd[0]);
scsi->sk = SCSI_SK_ILLEGAL_REQUEST;
scsi->asc = SCSI_ASC_INVALID_COMMAND_OPERATION_CODE;
return false;
}; break;
}
}
bool scsi_cmd_tx_data(SCSISession* scsi, uint8_t* data, uint32_t* len, uint32_t cap) {
FURI_LOG_T(TAG, "TX %02X cap %lu", scsi->cmd[0], cap);
if(scsi->tx_done) return false;
switch(scsi->cmd[0]) {
case SCSI_REQUEST_SENSE: {
FURI_LOG_D(TAG, "SCSI_REQUEST_SENSE");
if(cap < 18) return false;
memset(data, 0, cap);
data[0] = 0x70; // fixed format sense data
data[1] = 0; // obsolete
data[2] = scsi->sk; // sense key
data[3] = 0; // information
data[4] = 0; // information
data[5] = 0; // information
data[6] = 0; // information
data[7] = 10; // additional sense length (len-8)
data[8] = 0; // command specific information
data[9] = 0; // command specific information
data[10] = 0; // command specific information
data[11] = 0; // command specific information
data[12] = scsi->asc; // additional sense code
data[13] = 0; // additional sense code qualifier
data[14] = 0; // field replaceable unit code
data[15] = 0; // sense key specific information
data[16] = 0; // sense key specific information
data[17] = 0; // sense key specific information
*len = 18;
scsi->sk = 0;
scsi->asc = 0;
scsi->tx_done = true;
return true;
}; break;
case SCSI_INQUIRY: {
FURI_LOG_D(TAG, "SCSI_INQUIRY");
if(scsi->cmd_len < 5) return false;
if(cap < 36) return false;
bool evpd = scsi->cmd[1] & 1;
uint8_t page_code = scsi->cmd[2];
if(evpd == 0) {
if(page_code != 0) return false;
data[0] = 0x00; // device type: direct access block device
data[1] = 0x80; // removable: true
data[2] = 0x04; // version
data[3] = 0x02; // response data format
data[4] = 31; // additional length (len - 5)
data[5] = 0; // flags
data[6] = 0; // flags
data[7] = 0; // flags
memcpy(data + 8, "Flipper ", 8); // vendor id
memcpy(data + 16, "Mass Storage ", 16); // product id
memcpy(data + 32, "0001", 4); // product revision level
*len = 36;
scsi->tx_done = true;
return true;
} else {
if(page_code != 0x80) {
FURI_LOG_W(TAG, "Unsupported VPD code %02X", page_code);
return false;
}
data[0] = 0x00;
data[1] = 0x80;
data[2] = 0x00;
data[3] = 0x01; // Serial len
data[4] = '0';
*len = 5;
scsi->tx_done = true;
return true;
}
}; break;
case SCSI_READ_FORMAT_CAPACITIES: {
FURI_LOG_D(TAG, "SCSI_READ_FORMAT_CAPACITIES");
if(cap < 12) {
return false;
}
uint32_t n_blocks = scsi->fn.num_blocks(scsi->fn.ctx);
uint32_t block_size = SCSI_BLOCK_SIZE;
// Capacity List Header
data[0] = 0;
data[1] = 0;
data[2] = 0;
data[3] = 8;
// Capacity Descriptor
data[4] = (n_blocks - 1) >> 24;
data[5] = (n_blocks - 1) >> 16;
data[6] = (n_blocks - 1) >> 8;
data[7] = (n_blocks - 1) & 0xFF;
data[8] = 0x02; // Formatted media
data[9] = block_size >> 16;
data[10] = block_size >> 8;
data[11] = block_size & 0xFF;
*len = 12;
scsi->tx_done = true;
return true;
}; break;
case SCSI_READ_CAPACITY_10: {
FURI_LOG_D(TAG, "SCSI_READ_CAPACITY_10");
if(cap < 8) return false;
uint32_t n_blocks = scsi->fn.num_blocks(scsi->fn.ctx);
uint32_t block_size = SCSI_BLOCK_SIZE;
data[0] = (n_blocks - 1) >> 24;
data[1] = (n_blocks - 1) >> 16;
data[2] = (n_blocks - 1) >> 8;
data[3] = (n_blocks - 1) & 0xFF;
data[4] = block_size >> 24;
data[5] = block_size >> 16;
data[6] = block_size >> 8;
data[7] = block_size & 0xFF;
*len = 8;
scsi->tx_done = true;
return true;
}; break;
case SCSI_MODE_SENSE_6: {
FURI_LOG_D(TAG, "SCSI_MODE_SENSE_6 %lu", cap);
if(cap < 4) return false;
data[0] = 3; // mode data length (len - 1)
data[1] = 0; // medium type
data[2] = 0; // device-specific parameter
data[3] = 0; // block descriptor length
*len = 4;
scsi->tx_done = true;
return true;
}; break;
case SCSI_READ_10: {
uint32_t block_size = SCSI_BLOCK_SIZE;
bool result =
scsi->fn.read(scsi->fn.ctx, scsi->read_10.lba, scsi->read_10.count, data, len, cap);
*len -= *len % block_size;
uint16_t blocks = *len / block_size;
scsi->read_10.lba += blocks;
scsi->read_10.count -= blocks;
if(!scsi->read_10.count) {
scsi->tx_done = true;
}
return result;
}; break;
default: {
FURI_LOG_W(TAG, "unexpected scsi tx data cmd=%02X", scsi->cmd[0]);
scsi->sk = SCSI_SK_ILLEGAL_REQUEST;
scsi->asc = SCSI_ASC_INVALID_COMMAND_OPERATION_CODE;
return false;
}; break;
}
}
bool scsi_cmd_end(SCSISession* scsi) {
FURI_LOG_T(TAG, "END %02X", scsi->cmd[0]);
uint8_t* cmd = scsi->cmd;
uint8_t len = scsi->cmd_len;
scsi->cmd = NULL;
scsi->cmd_len = 0;
switch(cmd[0]) {
case SCSI_WRITE_10:
return scsi->rx_done;
case SCSI_REQUEST_SENSE:
case SCSI_INQUIRY:
case SCSI_READ_FORMAT_CAPACITIES:
case SCSI_READ_CAPACITY_10:
case SCSI_MODE_SENSE_6:
case SCSI_READ_10:
return scsi->tx_done;
case SCSI_TEST_UNIT_READY: {
FURI_LOG_D(TAG, "SCSI_TEST_UNIT_READY");
return true;
}; break;
case SCSI_PREVENT_MEDIUM_REMOVAL: {
if(len < 6) return false;
bool prevent = cmd[5];
FURI_LOG_D(TAG, "SCSI_PREVENT_MEDIUM_REMOVAL prevent=%d", prevent);
return !prevent;
}; break;
case SCSI_START_STOP_UNIT: {
if(len < 6) return false;
bool eject = (cmd[4] & 2) != 0;
bool start = (cmd[4] & 1) != 0;
FURI_LOG_D(TAG, "SCSI_START_STOP_UNIT eject=%d start=%d", eject, start);
if(eject) {
scsi->fn.eject(scsi->fn.ctx);
}
return true;
}; break;
default: {
FURI_LOG_W(TAG, "unexpected scsi cmd=%02X", cmd[0]);
scsi->sk = SCSI_SK_ILLEGAL_REQUEST;
scsi->asc = SCSI_ASC_INVALID_COMMAND_OPERATION_CODE;
return false;
}; break;
}
}

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applications/system/mass_storage/helpers/mass_storage_scsi.h Normal file
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#pragma once
#include <furi.h>
#define SCSI_BLOCK_SIZE (0x200UL)
#define SCSI_SK_ILLEGAL_REQUEST (5)
#define SCSI_ASC_INVALID_COMMAND_OPERATION_CODE (0x20)
#define SCSI_ASC_LBA_OOB (0x21)
#define SCSI_ASC_INVALID_FIELD_IN_CDB (0x24)
typedef struct {
void* ctx;
bool (*read)(
void* ctx,
uint32_t lba,
uint16_t count,
uint8_t* out,
uint32_t* out_len,
uint32_t out_cap);
bool (*write)(void* ctx, uint32_t lba, uint16_t count, uint8_t* buf, uint32_t len);
uint32_t (*num_blocks)(void* ctx);
void (*eject)(void* ctx);
} SCSIDeviceFunc;
typedef struct {
SCSIDeviceFunc fn;
uint8_t* cmd;
uint8_t cmd_len;
bool rx_done;
bool tx_done;
uint8_t sk; // sense key
uint8_t asc; // additional sense code
// command-specific data
// valid from cmd_start to cmd_end
union {
struct {
uint16_t count;
uint32_t lba;
} read_10; // SCSI_READ_10
struct {
uint16_t count;
uint32_t lba;
} write_10; // SCSI_WRITE_10
};
} SCSISession;
bool scsi_cmd_start(SCSISession* scsi, uint8_t* cmd, uint8_t len);
bool scsi_cmd_rx_data(SCSISession* scsi, uint8_t* data, uint32_t len);
bool scsi_cmd_tx_data(SCSISession* scsi, uint8_t* data, uint32_t* len, uint32_t cap);
bool scsi_cmd_end(SCSISession* scsi);

481
applications/system/mass_storage/helpers/mass_storage_usb.c Normal file
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#include "mass_storage_usb.h"
#include <furi_hal.h>
#define TAG "MassStorageUsb"
#define USB_MSC_RX_EP (0x01)
#define USB_MSC_TX_EP (0x82)
#define USB_MSC_RX_EP_SIZE (64UL)
#define USB_MSC_TX_EP_SIZE (64UL)
#define USB_MSC_BOT_GET_MAX_LUN (0xFE)
#define USB_MSC_BOT_RESET (0xFF)
#define CBW_SIG (0x43425355)
#define CBW_FLAGS_DEVICE_TO_HOST (0x80)
#define CSW_SIG (0x53425355)
#define CSW_STATUS_OK (0)
#define CSW_STATUS_NOK (1)
#define CSW_STATUS_PHASE_ERROR (2)
// must be SCSI_BLOCK_SIZE aligned
// larger than 0x10000 exceeds size_t, storage_file_* ops fail
#define USB_MSC_BUF_MAX (0x10000UL - SCSI_BLOCK_SIZE)
static usbd_respond usb_ep_config(usbd_device* dev, uint8_t cfg);
static usbd_respond usb_control(usbd_device* dev, usbd_ctlreq* req, usbd_rqc_callback* callback);
typedef enum {
EventExit = 1 << 0,
EventReset = 1 << 1,
EventRxTx = 1 << 2,
EventAll = EventExit | EventReset | EventRxTx,
} MassStorageEvent;
typedef struct {
uint32_t sig;
uint32_t tag;
uint32_t len;
uint8_t flags;
uint8_t lun;
uint8_t cmd_len;
uint8_t cmd[16];
} __attribute__((packed)) CBW;
typedef struct {
uint32_t sig;
uint32_t tag;
uint32_t residue;
uint8_t status;
} __attribute__((packed)) CSW;
struct MassStorageUsb {
FuriHalUsbInterface usb;
FuriHalUsbInterface* usb_prev;
FuriThread* thread;
usbd_device* dev;
SCSIDeviceFunc fn;
};
static int32_t mass_thread_worker(void* context) {
MassStorageUsb* mass = context;
usbd_device* dev = mass->dev;
SCSISession scsi = {
.fn = mass->fn,
};
CBW cbw = {0};
CSW csw = {0};
uint8_t* buf = NULL;
uint32_t buf_len = 0, buf_cap = 0, buf_sent = 0;
enum {
StateReadCBW,
StateReadData,
StateWriteData,
StateBuildCSW,
StateWriteCSW,
} state = StateReadCBW;
while(true) {
uint32_t flags = furi_thread_flags_wait(EventAll, FuriFlagWaitAny, FuriWaitForever);
if(flags & EventExit) {
FURI_LOG_D(TAG, "exit");
break;
}
if(flags & EventReset) {
FURI_LOG_D(TAG, "reset");
scsi.sk = 0;
scsi.asc = 0;
memset(&cbw, 0, sizeof(cbw));
memset(&csw, 0, sizeof(csw));
if(buf) {
free(buf);
buf = NULL;
}
buf_len = buf_cap = buf_sent = 0;
state = StateReadCBW;
}
if(flags & EventRxTx) do {
switch(state) {
case StateReadCBW: {
FURI_LOG_T(TAG, "StateReadCBW");
int32_t len = usbd_ep_read(dev, USB_MSC_RX_EP, &cbw, sizeof(cbw));
if(len <= 0) {
FURI_LOG_T(TAG, "cbw not ready");
break;
}
if(len != sizeof(cbw) || cbw.sig != CBW_SIG) {
FURI_LOG_W(TAG, "bad cbw sig=%08lx", cbw.sig);
usbd_ep_stall(dev, USB_MSC_TX_EP);
usbd_ep_stall(dev, USB_MSC_RX_EP);
continue;
}
if(!scsi_cmd_start(&scsi, cbw.cmd, cbw.cmd_len)) {
FURI_LOG_W(TAG, "bad cmd");
usbd_ep_stall(dev, USB_MSC_RX_EP);
csw.sig = CSW_SIG;
csw.tag = cbw.tag;
csw.status = CSW_STATUS_NOK;
state = StateWriteCSW;
continue;
}
if(cbw.flags & CBW_FLAGS_DEVICE_TO_HOST) {
buf_len = 0;
buf_sent = 0;
state = StateWriteData;
} else {
buf_len = 0;
state = StateReadData;
}
continue;
}; break;
case StateReadData: {
FURI_LOG_T(TAG, "StateReadData %lu/%lu", buf_len, cbw.len);
if(!cbw.len) {
state = StateBuildCSW;
continue;
}
uint32_t buf_clamp = MIN(cbw.len, USB_MSC_BUF_MAX);
if(buf_clamp > buf_cap) {
FURI_LOG_T(TAG, "growing buf %lu -> %lu", buf_cap, buf_clamp);
if(buf) {
free(buf);
}
buf_cap = buf_clamp;
buf = malloc(buf_cap);
}
if(buf_len < buf_clamp) {
int32_t len =
usbd_ep_read(dev, USB_MSC_RX_EP, buf + buf_len, buf_clamp - buf_len);
if(len < 0) {
FURI_LOG_T(TAG, "rx not ready %ld", len);
break;
}
FURI_LOG_T(TAG, "clamp %lu len %ld", buf_clamp, len);
buf_len += len;
}
if(buf_len == buf_clamp) {
if(!scsi_cmd_rx_data(&scsi, buf, buf_len)) {
FURI_LOG_W(TAG, "short rx");
usbd_ep_stall(dev, USB_MSC_RX_EP);
csw.sig = CSW_SIG;
csw.tag = cbw.tag;
csw.status = CSW_STATUS_NOK;
csw.residue = cbw.len;
state = StateWriteCSW;
continue;
}
cbw.len -= buf_len;
buf_len = 0;
}
continue;
}; break;
case StateWriteData: {
FURI_LOG_T(TAG, "StateWriteData %lu", cbw.len);
if(!cbw.len) {
state = StateBuildCSW;
continue;
}
uint32_t buf_clamp = MIN(cbw.len, USB_MSC_BUF_MAX);
if(buf_clamp > buf_cap) {
FURI_LOG_T(TAG, "growing buf %lu -> %lu", buf_cap, buf_clamp);
if(buf) {
free(buf);
}
buf_cap = buf_clamp;
buf = malloc(buf_cap);
}
if(!buf_len && !scsi_cmd_tx_data(&scsi, buf, &buf_len, buf_clamp)) {
FURI_LOG_W(TAG, "short tx");
// usbd_ep_stall(dev, USB_MSC_TX_EP);
state = StateBuildCSW;
continue;
}
int32_t len = usbd_ep_write(
dev,
USB_MSC_TX_EP,
buf + buf_sent,
MIN(USB_MSC_TX_EP_SIZE, buf_len - buf_sent));
if(len < 0) {
FURI_LOG_T(TAG, "tx not ready %ld", len);
break;
}
buf_sent += len;
if(buf_sent == buf_len) {
cbw.len -= buf_len;
buf_len = 0;
buf_sent = 0;
}
continue;
}; break;
case StateBuildCSW: {
FURI_LOG_T(TAG, "StateBuildCSW");
csw.sig = CSW_SIG;
csw.tag = cbw.tag;
if(scsi_cmd_end(&scsi)) {
csw.status = CSW_STATUS_OK;
} else {
csw.status = CSW_STATUS_NOK;
}
csw.residue = cbw.len;
state = StateWriteCSW;
continue;
}; break;
case StateWriteCSW: {
FURI_LOG_T(TAG, "StateWriteCSW");
if(csw.status) {
FURI_LOG_W(
TAG,
"csw sig=%08lx tag=%08lx residue=%08lx status=%02x",
csw.sig,
csw.tag,
csw.residue,
csw.status);
}
int32_t len = usbd_ep_write(dev, USB_MSC_TX_EP, &csw, sizeof(csw));
if(len < 0) {
FURI_LOG_T(TAG, "csw not ready");
break;
}
if(len != sizeof(csw)) {
FURI_LOG_W(TAG, "bad csw write %ld", len);
usbd_ep_stall(dev, USB_MSC_TX_EP);
break;
}
memset(&cbw, 0, sizeof(cbw));
memset(&csw, 0, sizeof(csw));
state = StateReadCBW;
continue;
}; break;
}
break;
} while(true);
}
if(buf) {
free(buf);
}
return 0;
}
// needed in usb_deinit, usb_suspend, usb_rxtx_ep_callback, usb_control,
// where if_ctx isn't passed
static MassStorageUsb* mass_cur = NULL;
static void usb_init(usbd_device* dev, FuriHalUsbInterface* intf, void* ctx) {
UNUSED(intf);
MassStorageUsb* mass = ctx;
mass_cur = mass;
mass->dev = dev;
usbd_reg_config(dev, usb_ep_config);
usbd_reg_control(dev, usb_control);
usbd_connect(dev, true);
mass->thread = furi_thread_alloc();
furi_thread_set_name(mass->thread, "MassStorageUsb");
furi_thread_set_stack_size(mass->thread, 1024);
furi_thread_set_context(mass->thread, ctx);
furi_thread_set_callback(mass->thread, mass_thread_worker);
furi_thread_start(mass->thread);
}
static void usb_deinit(usbd_device* dev) {
usbd_reg_config(dev, NULL);
usbd_reg_control(dev, NULL);
MassStorageUsb* mass = mass_cur;
if(!mass || mass->dev != dev) {
FURI_LOG_E(TAG, "deinit mass_cur leak");
return;
}
mass_cur = NULL;
furi_assert(mass->thread);
furi_thread_flags_set(furi_thread_get_id(mass->thread), EventExit);
furi_thread_join(mass->thread);
furi_thread_free(mass->thread);
mass->thread = NULL;
free(mass->usb.str_prod_descr);
mass->usb.str_prod_descr = NULL;
free(mass->usb.str_serial_descr);
mass->usb.str_serial_descr = NULL;
free(mass);
}
static void usb_wakeup(usbd_device* dev) {
UNUSED(dev);
}
static void usb_suspend(usbd_device* dev) {
MassStorageUsb* mass = mass_cur;
if(!mass || mass->dev != dev) return;
furi_thread_flags_set(furi_thread_get_id(mass->thread), EventReset);
}
static void usb_rxtx_ep_callback(usbd_device* dev, uint8_t event, uint8_t ep) {
UNUSED(ep);
UNUSED(event);
MassStorageUsb* mass = mass_cur;
if(!mass || mass->dev != dev) return;
furi_thread_flags_set(furi_thread_get_id(mass->thread), EventRxTx);
}
static usbd_respond usb_ep_config(usbd_device* dev, uint8_t cfg) {
switch(cfg) {
case 0: // deconfig
usbd_ep_deconfig(dev, USB_MSC_RX_EP);
usbd_ep_deconfig(dev, USB_MSC_TX_EP);
usbd_reg_endpoint(dev, USB_MSC_RX_EP, NULL);
usbd_reg_endpoint(dev, USB_MSC_TX_EP, NULL);
return usbd_ack;
case 1: // config
usbd_ep_config(
dev, USB_MSC_RX_EP, USB_EPTYPE_BULK /* | USB_EPTYPE_DBLBUF*/, USB_MSC_RX_EP_SIZE);
usbd_ep_config(
dev, USB_MSC_TX_EP, USB_EPTYPE_BULK /* | USB_EPTYPE_DBLBUF*/, USB_MSC_TX_EP_SIZE);
usbd_reg_endpoint(dev, USB_MSC_RX_EP, usb_rxtx_ep_callback);
usbd_reg_endpoint(dev, USB_MSC_TX_EP, usb_rxtx_ep_callback);
return usbd_ack;
}
return usbd_fail;
}
static usbd_respond usb_control(usbd_device* dev, usbd_ctlreq* req, usbd_rqc_callback* callback) {
UNUSED(callback);
if(((USB_REQ_RECIPIENT | USB_REQ_TYPE) & req->bmRequestType) !=
(USB_REQ_INTERFACE | USB_REQ_CLASS)) {
return usbd_fail;
}
switch(req->bRequest) {
case USB_MSC_BOT_GET_MAX_LUN: {
static uint8_t max_lun = 0;
dev->status.data_ptr = &max_lun;
dev->status.data_count = 1;
return usbd_ack;
}; break;
case USB_MSC_BOT_RESET: {
MassStorageUsb* mass = mass_cur;
if(!mass || mass->dev != dev) return usbd_fail;
furi_thread_flags_set(furi_thread_get_id(mass->thread), EventReset);
return usbd_ack;
}; break;
}
return usbd_fail;
}
static const struct usb_string_descriptor dev_manuf_desc = USB_STRING_DESC("Flipper Devices Inc.");
struct MassStorageDescriptor {
struct usb_config_descriptor config;
struct usb_interface_descriptor intf;
struct usb_endpoint_descriptor ep_rx;
struct usb_endpoint_descriptor ep_tx;
} __attribute__((packed));
static const struct usb_device_descriptor usb_mass_dev_descr = {
.bLength = sizeof(struct usb_device_descriptor),
.bDescriptorType = USB_DTYPE_DEVICE,
.bcdUSB = VERSION_BCD(2, 0, 0),
.bDeviceClass = USB_CLASS_PER_INTERFACE,
.bDeviceSubClass = USB_SUBCLASS_NONE,
.bDeviceProtocol = USB_PROTO_NONE,
.bMaxPacketSize0 = 8, // USB_EP0_SIZE
.idVendor = 0x0483,
.idProduct = 0x5720,
.bcdDevice = VERSION_BCD(1, 0, 0),
.iManufacturer = 1, // UsbDevManuf
.iProduct = 2, // UsbDevProduct
.iSerialNumber = 3, // UsbDevSerial
.bNumConfigurations = 1,
};
static const struct MassStorageDescriptor usb_mass_cfg_descr = {
.config =
{
.bLength = sizeof(struct usb_config_descriptor),
.bDescriptorType = USB_DTYPE_CONFIGURATION,
.wTotalLength = sizeof(struct MassStorageDescriptor),
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.iConfiguration = NO_DESCRIPTOR,
.bmAttributes = USB_CFG_ATTR_RESERVED | USB_CFG_ATTR_SELFPOWERED,
.bMaxPower = USB_CFG_POWER_MA(100),
},
.intf =
{
.bLength = sizeof(struct usb_interface_descriptor),
.bDescriptorType = USB_DTYPE_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 0,
.bNumEndpoints = 2,
.bInterfaceClass = USB_CLASS_MASS_STORAGE,
.bInterfaceSubClass = 0x06, // scsi transparent
.bInterfaceProtocol = 0x50, // bulk only
.iInterface = NO_DESCRIPTOR,
},
.ep_rx =
{
.bLength = sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = USB_DTYPE_ENDPOINT,
.bEndpointAddress = USB_MSC_RX_EP,
.bmAttributes = USB_EPTYPE_BULK,
.wMaxPacketSize = USB_MSC_RX_EP_SIZE,
.bInterval = 0,
},
.ep_tx =
{
.bLength = sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = USB_DTYPE_ENDPOINT,
.bEndpointAddress = USB_MSC_TX_EP,
.bmAttributes = USB_EPTYPE_BULK,
.wMaxPacketSize = USB_MSC_TX_EP_SIZE,
.bInterval = 0,
},
};
MassStorageUsb* mass_storage_usb_start(const char* filename, SCSIDeviceFunc fn) {
MassStorageUsb* mass = malloc(sizeof(MassStorageUsb));
mass->usb_prev = furi_hal_usb_get_config();
mass->usb.init = usb_init;
mass->usb.deinit = usb_deinit;
mass->usb.wakeup = usb_wakeup;
mass->usb.suspend = usb_suspend;
mass->usb.dev_descr = (struct usb_device_descriptor*)&usb_mass_dev_descr;
mass->usb.str_manuf_descr = (void*)&dev_manuf_desc;
mass->usb.str_prod_descr = NULL;
mass->usb.str_serial_descr = NULL;
mass->usb.cfg_descr = (void*)&usb_mass_cfg_descr;
const char* name = furi_hal_version_get_device_name_ptr();
if(!name) name = "Flipper Zero";
size_t len = strlen(name);
struct usb_string_descriptor* str_prod_descr = malloc(len * 2 + 2);
str_prod_descr->bLength = len * 2 + 2;
str_prod_descr->bDescriptorType = USB_DTYPE_STRING;
for(uint8_t i = 0; i < len; i++) str_prod_descr->wString[i] = name[i];
mass->usb.str_prod_descr = str_prod_descr;
len = strlen(filename);
struct usb_string_descriptor* str_serial_descr = malloc(len * 2 + 2);
str_serial_descr->bLength = len * 2 + 2;
str_serial_descr->bDescriptorType = USB_DTYPE_STRING;
for(uint8_t i = 0; i < len; i++) str_serial_descr->wString[i] = filename[i];
mass->usb.str_serial_descr = str_serial_descr;
mass->fn = fn;
if(!furi_hal_usb_set_config(&mass->usb, mass)) {
FURI_LOG_E(TAG, "USB locked, cannot start Mass Storage");
free(mass->usb.str_prod_descr);
free(mass->usb.str_serial_descr);
free(mass);
return NULL;
}
return mass;
}
void mass_storage_usb_stop(MassStorageUsb* mass) {
furi_hal_usb_set_config(mass->usb_prev, NULL);
}

9
applications/system/mass_storage/helpers/mass_storage_usb.h Normal file
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#pragma once
#include <storage/storage.h>
#include "mass_storage_scsi.h"
typedef struct MassStorageUsb MassStorageUsb;
MassStorageUsb* mass_storage_usb_start(const char* filename, SCSIDeviceFunc fn);
void mass_storage_usb_stop(MassStorageUsb* mass);