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/*
* Copyright (c) 2021, STMicroelectronics - All Rights Reserved
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <limits.h>
#include <string.h>
#include <common/debug.h>
#include <drivers/st/bsec.h>
#include <drivers/st/stm32mp1_usb.h>
#include <drivers/usb_device.h>
#include <platform_def.h>
#include <stm32cubeprogrammer.h>
#include <stm32mp_common.h>
#include <usb_dfu.h>
/* String size (1 byte) + type (1 byte) + 24 UTF16 characters: 2 bytes each */
#define SIZ_STRING_SERIAL U(24)
#define USB_SIZ_STRING_SERIAL (1U + 1U + (SIZ_STRING_SERIAL * 2U))
#define USBD_MAX_STR_DESC_SIZ 0x100
#define USBD_VID 0x0483
#define USBD_PID 0xDF11
#define USBD_LANGID_STRING 0x409
#define USBD_MANUFACTURER_STRING "STMicroelectronics"
#define USBD_CONFIGURATION_STRING "DFU Config"
#define USBD_INTERFACE_STRING "DFU Interface"
#define USB_DFU_ITF_NUM 6
#define USB_DFU_CONFIG_DESC_SIZ USB_DFU_DESC_SIZ(USB_DFU_ITF_NUM)
/* DFU devices */
static struct usb_dfu_handle usb_dfu_handle;
/* USB Standard Device Descriptor */
static const uint8_t usb_stm32mp1_desc[USB_LEN_DEV_DESC] = {
USB_LEN_DEV_DESC, /* bLength */
USB_DESC_TYPE_DEVICE, /* bDescriptorType */
0x00, /* bcdUSB */
0x02, /* version */
0x00, /* bDeviceClass */
0x00, /* bDeviceSubClass */
0x00, /* bDeviceProtocol */
USB_MAX_EP0_SIZE, /* bMaxPacketSize */
LOBYTE(USBD_VID), /* idVendor */
HIBYTE(USBD_VID), /* idVendor */
LOBYTE(USBD_PID), /* idVendor */
HIBYTE(USBD_PID), /* idVendor */
0x00, /* bcdDevice rel. 2.00 */
0x02,
USBD_IDX_MFC_STR, /* Index of manufacturer string */
USBD_IDX_PRODUCT_STR, /* Index of product string */
USBD_IDX_SERIAL_STR, /* Index of serial number string */
USBD_MAX_NUM_CONFIGURATION /* bNumConfigurations */
}; /* USB_DeviceDescriptor */
/* USB Standard String Descriptor */
static const uint8_t usb_stm32mp1_lang_id_desc[USB_LEN_LANGID_STR_DESC] = {
USB_LEN_LANGID_STR_DESC,
USB_DESC_TYPE_STRING,
LOBYTE(USBD_LANGID_STRING),
HIBYTE(USBD_LANGID_STRING),
};
/* USB Standard Device Descriptor */
static const uint8_t
usbd_stm32mp1_qualifier_desc[USB_LEN_DEV_QUALIFIER_DESC] = {
USB_LEN_DEV_QUALIFIER_DESC,
USB_DESC_TYPE_DEVICE_QUALIFIER,
0x00,
0x02,
0x00,
0x00,
0x00,
0x40,
0x01,
0x00,
};
/* USB serial number: build dynamically */
static uint8_t usb_stm32mp1_serial[USB_SIZ_STRING_SERIAL + 1];
/* USB DFU device Configuration Descriptor */
static const uint8_t usb_stm32mp1_config_desc[USB_DFU_CONFIG_DESC_SIZ] = {
0x09, /* bLength: Configuration Descriptor size */
USB_DESC_TYPE_CONFIGURATION, /* bDescriptorType: Configuration */
USB_DFU_CONFIG_DESC_SIZ, /* wTotalLength: Bytes returned */
0x00,
0x01, /* bNumInterfaces: 1 interface */
0x01, /* bConfigurationValue: Configuration value */
0x02, /* iConfiguration: Index of string descriptor for configuration */
0xC0, /* bmAttributes: bus powered and Supprts Remote Wakeup */
0x32, /* MaxPower 100 mA: this current is used for detecting Vbus */
/* Descriptor of DFU interface 0 Alternate setting 0..N */
USBD_DFU_IF_DESC(0),
USBD_DFU_IF_DESC(1),
USBD_DFU_IF_DESC(2),
USBD_DFU_IF_DESC(3),
USBD_DFU_IF_DESC(4),
USBD_DFU_IF_DESC(5),
/* DFU Functional Descriptor */
0x09, /* blength = 9 Bytes */
DFU_DESCRIPTOR_TYPE, /* DFU Functional Descriptor */
DFU_BM_ATTRIBUTE, /* bmAttribute for DFU */
0xFF, /* DetachTimeOut = 255 ms */
0x00,
TRANSFER_SIZE_BYTES(USBD_DFU_XFER_SIZE), /* TransferSize = 1024 Byte */
((USB_DFU_VERSION >> 0) & 0xFF), /* bcdDFUVersion */
((USB_DFU_VERSION >> 8) & 0xFF)
};
/* The user strings: one by alternate as defined in USBD_DFU_IF_DESC */
const char *const if_desc_string[USB_DFU_ITF_NUM] = {
"@Partition0 /0x00/1*256Ke",
"@FSBL /0x01/1*1Me",
"@Partition2 /0x02/1*1Me",
"@Partition3 /0x03/1*16Me",
"@Partition4 /0x04/1*16Me",
"@virtual /0xF1/1*512Ba"
};
/* Buffer to build the unicode string provided to USB device stack */
static uint8_t usb_str_dec[USBD_MAX_STR_DESC_SIZ];
/*
* Convert Ascii string into unicode one
* desc : descriptor buffer
* unicode : Formatted string buffer (unicode)
* len : descriptor length
*/
static void stm32mp1_get_string(const char *desc, uint8_t *unicode, uint16_t *len)
{
uint8_t idx = 0U;
if (desc == NULL) {
return;
}
*len = strlen(desc) * 2U + 2U;
unicode[idx++] = *len;
unicode[idx++] = USB_DESC_TYPE_STRING;
while (*desc != '\0') {
unicode[idx++] = *desc++;
unicode[idx++] = 0x00U;
}
}
/*
* Create the serial number string descriptor
*/
static void update_serial_num_string(void)
{
uint8_t i;
uint32_t result;
char serial_string[SIZ_STRING_SERIAL + 2U];
uint32_t deviceserial[UID_WORD_NB];
uint16_t length;
for (i = 0U; i < UID_WORD_NB; i++) {
result = bsec_shadow_register(i + UID0_OTP);
if (result != BSEC_OK) {
ERROR("BSEC: UID%d Shadowing Error\n", i);
break;
}
result = bsec_read_otp(&deviceserial[i], i + UID0_OTP);
if (result != BSEC_OK) {
ERROR("BSEC: UID%d Read Error\n", i);
break;
}
}
/* On bsec error: serial number is set to 0 */
if (result != BSEC_OK) {
for (i = 0; i < UID_WORD_NB; i++) {
deviceserial[i] = 0U;
}
}
/* build serial number with OTP value as in ROM code */
snprintf(serial_string, sizeof(serial_string), "%08X%08X%08X",
deviceserial[0], deviceserial[1], deviceserial[2]);
length = USB_SIZ_STRING_SERIAL;
stm32mp1_get_string(serial_string, usb_stm32mp1_serial, &length);
}
/*
* Return Device Qualifier descriptor
* length : pointer data length
* return : pointer to descriptor buffer
*/
static uint8_t *stm32mp1_get_qualifier_desc(uint16_t *length)
{
*length = sizeof(usbd_stm32mp1_qualifier_desc);
return (uint8_t *)usbd_stm32mp1_qualifier_desc;
}
/*
* Return configuration descriptor
* length : pointer data length
* return : pointer to descriptor buffer
*/
static uint8_t *stm32mp1_get_config_desc(uint16_t *length)
{
*length = sizeof(usb_stm32mp1_config_desc);
return (uint8_t *)usb_stm32mp1_config_desc;
}
/*
* Returns the device descriptor.
* length: Pointer to data length variable
* return : Pointer to descriptor buffer
*/
static uint8_t *stm32mp1_device_desc(uint16_t *length)
{
*length = sizeof(usb_stm32mp1_desc);
return (uint8_t *)usb_stm32mp1_desc;
}
/*
* Returns the LangID string descriptor.
* length: Pointer to data length variable
* return : Pointer to descriptor buffer
*/
static uint8_t *stm32mp1_lang_id_desc(uint16_t *length)
{
*length = sizeof(usb_stm32mp1_lang_id_desc);
return (uint8_t *)usb_stm32mp1_lang_id_desc;
}
/*
* Returns the product string descriptor.
* length: Pointer to data length variable
* return : Pointer to descriptor buffer
*/
static uint8_t *stm32mp1_product_desc(uint16_t *length)
{
char name[STM32_SOC_NAME_SIZE];
char product[128];
uint32_t chip_id;
uint32_t chip_version;
stm32mp_get_soc_name(name);
chip_id = stm32mp_get_chip_dev_id();
chip_version = stm32mp_get_chip_version();
snprintf(product, sizeof(product),
"DFU @Device ID /0x%03X, @Revision ID /0x%04X, @Name /%s,",
chip_id, chip_version, name);
stm32mp1_get_string(product, usb_str_dec, length);
return usb_str_dec;
}
/*
* Returns the manufacturer string descriptor.
* length: Pointer to data length variable
* return : Pointer to descriptor buffer
*/
static uint8_t *stm32mp1_manufacturer_desc(uint16_t *length)
{
stm32mp1_get_string(USBD_MANUFACTURER_STRING, usb_str_dec, length);
return usb_str_dec;
}
/*
* Returns the serial number string descriptor.
* length: Pointer to data length variable
* return : Pointer to descriptor buffer
*/
static uint8_t *stm32mp1_serial_desc(uint16_t *length)
{
*length = USB_SIZ_STRING_SERIAL;
return (uint8_t *)usb_stm32mp1_serial;
}
/*
* Returns the configuration string descriptor.
* length: Pointer to data length variable
* return : Pointer to descriptor buffer
*/
static uint8_t *stm32mp1_config_desc(uint16_t *length)
{
stm32mp1_get_string(USBD_CONFIGURATION_STRING, usb_str_dec, length);
return usb_str_dec;
}
/*
* Returns the interface string descriptor.
* length : Pointer to data length variable
* return : Pointer to descriptor buffer
*/
static uint8_t *stm32mp1_interface_desc(uint16_t *length)
{
stm32mp1_get_string(USBD_INTERFACE_STRING, usb_str_dec, length);
return usb_str_dec;
}
/*
* Manages the transfer of memory interfaces string descriptors.
* index: descriptor index
* length : pointer data length
* return : pointer to the descriptor table or NULL if the descriptor
* is not supported.
*/
static uint8_t *stm32mp1_get_usr_desc(uint8_t index, uint16_t *length)
{
if (index >= ARRAY_SIZE(if_desc_string)) {
return NULL;
}
stm32mp1_get_string(if_desc_string[index], usb_str_dec, length);
return usb_str_dec;
}
static const struct usb_desc dfu_desc = {
.get_device_desc = stm32mp1_device_desc,
.get_lang_id_desc = stm32mp1_lang_id_desc,
.get_manufacturer_desc = stm32mp1_manufacturer_desc,
.get_product_desc = stm32mp1_product_desc,
.get_configuration_desc = stm32mp1_config_desc,
.get_serial_desc = stm32mp1_serial_desc,
.get_interface_desc = stm32mp1_interface_desc,
.get_usr_desc = stm32mp1_get_usr_desc,
.get_config_desc = stm32mp1_get_config_desc,
.get_device_qualifier_desc = stm32mp1_get_qualifier_desc,
};
static struct usb_handle usb_core_handle;
static struct pcd_handle pcd_handle;
struct usb_handle *usb_dfu_plat_init(void)
{
/* Prepare USB Driver */
pcd_handle.in_ep[0].maxpacket = USB_MAX_EP0_SIZE;
pcd_handle.out_ep[0].maxpacket = USB_MAX_EP0_SIZE;
stm32mp1_usb_init_driver(&usb_core_handle, &pcd_handle,
(uint32_t *)USB_OTG_BASE);
/* STM32MP15 = keep the configuration from ROM code */
usb_core_handle.ep0_state = USBD_EP0_DATA_IN;
usb_core_handle.dev_state = USBD_STATE_CONFIGURED;
/* Update the serial number string descriptor from the unique ID */
update_serial_num_string();
/* Prepare USB DFU stack */
usb_dfu_register(&usb_core_handle, &usb_dfu_handle);
/* Register DFU descriptor in USB stack */
register_platform(&usb_core_handle, &dfu_desc);
return &usb_core_handle;
}
/* Link between USB alternate and STM32CubeProgramer phase */
uint8_t usb_dfu_get_phase(uint8_t alt)
{
uint8_t ret;
switch (alt) {
case 3:
ret = PHASE_SSBL;
break;
case 5:
ret = PHASE_CMD;
break;
default:
ret = PHASE_RESET;
break;
}
return ret;
}