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// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
* Copyright (C) 2020, STMicroelectronics - All Rights Reserved
*/
#include <common.h>
#include <dfu.h>
#include <g_dnl.h>
#include <usb.h>
#include <asm/arch/stm32prog.h>
#include <asm/arch/sys_proto.h>
#include "stm32prog.h"
static int stm32prog_set_phase(struct stm32prog_data *data, u8 phase,
u32 offset)
{
struct stm32prog_part_t *part;
int i;
if (phase == data->phase) {
data->offset = offset;
return 0;
}
/* found partition for phase */
for (i = 0; i < data->part_nb; i++) {
part = &data->part_array[i];
if (part->id == phase) {
data->cur_part = part;
data->phase = phase;
data->offset = offset;
return 0;
}
}
return -EINVAL;
}
static int stm32prog_cmd_write(u64 offset, void *buf, long *len)
{
u8 phase;
u32 address;
u8 *pt = buf;
void (*entry)(void);
int ret;
if (*len < 5) {
pr_err("size not allowed\n");
return -EINVAL;
}
if (offset) {
pr_err("invalid offset\n");
return -EINVAL;
}
phase = pt[0];
address = (pt[1] << 24) | (pt[2] << 16) | (pt[3] << 8) | pt[4];
if (phase == PHASE_RESET) {
entry = (void *)address;
printf("## Starting application at 0x%x ...\n", address);
(*entry)();
printf("## Application terminated\n");
return 0;
}
/* set phase and offset */
ret = stm32prog_set_phase(stm32prog_data, phase, address);
if (ret)
pr_err("failed: %d\n", ret);
return ret;
}
#define PHASE_MIN_SIZE 9
static int stm32prog_cmd_read(u64 offset, void *buf, long *len)
{
u32 destination = DEFAULT_ADDRESS; /* destination address */
u32 dfu_offset;
u8 *pt_buf = buf;
int phase;
char *err_msg;
int length;
if (*len < PHASE_MIN_SIZE) {
pr_err("request exceeds allowed area\n");
return -EINVAL;
}
if (offset) {
*len = 0; /* EOF for second request */
return 0;
}
phase = stm32prog_data->phase;
if (phase == PHASE_FLASHLAYOUT)
destination = STM32_DDR_BASE;
dfu_offset = stm32prog_data->offset;
/* mandatory header, size = PHASE_MIN_SIZE */
*pt_buf++ = (u8)(phase & 0xFF);
*pt_buf++ = (u8)(destination);
*pt_buf++ = (u8)(destination >> 8);
*pt_buf++ = (u8)(destination >> 16);
*pt_buf++ = (u8)(destination >> 24);
*pt_buf++ = (u8)(dfu_offset);
*pt_buf++ = (u8)(dfu_offset >> 8);
*pt_buf++ = (u8)(dfu_offset >> 16);
*pt_buf++ = (u8)(dfu_offset >> 24);
if (phase == PHASE_RESET || phase == PHASE_DO_RESET) {
err_msg = stm32prog_get_error(stm32prog_data);
length = strlen(err_msg);
if (length + PHASE_MIN_SIZE > *len)
length = *len - PHASE_MIN_SIZE;
memcpy(pt_buf, err_msg, length);
*len = PHASE_MIN_SIZE + length;
stm32prog_do_reset(stm32prog_data);
} else if (phase == PHASE_FLASHLAYOUT) {
*pt_buf++ = stm32prog_data->part_nb ? 1 : 0;
*len = PHASE_MIN_SIZE + 1;
} else {
*len = PHASE_MIN_SIZE;
}
return 0;
}
int stm32prog_write_medium_virt(struct dfu_entity *dfu, u64 offset,
void *buf, long *len)
{
if (dfu->dev_type != DFU_DEV_VIRT)
return -EINVAL;
switch (dfu->data.virt.dev_num) {
case PHASE_CMD:
return stm32prog_cmd_write(offset, buf, len);
case PHASE_OTP:
return stm32prog_otp_write(stm32prog_data, (u32)offset,
buf, len);
case PHASE_PMIC:
return stm32prog_pmic_write(stm32prog_data, (u32)offset,
buf, len);
}
*len = 0;
return 0;
}
int stm32prog_read_medium_virt(struct dfu_entity *dfu, u64 offset,
void *buf, long *len)
{
if (dfu->dev_type != DFU_DEV_VIRT)
return -EINVAL;
switch (dfu->data.virt.dev_num) {
case PHASE_CMD:
return stm32prog_cmd_read(offset, buf, len);
case PHASE_OTP:
return stm32prog_otp_read(stm32prog_data, (u32)offset,
buf, len);
case PHASE_PMIC:
return stm32prog_pmic_read(stm32prog_data, (u32)offset,
buf, len);
}
*len = 0;
return 0;
}
int stm32prog_get_medium_size_virt(struct dfu_entity *dfu, u64 *size)
{
if (dfu->dev_type != DFU_DEV_VIRT) {
*size = 0;
pr_debug("%s, invalid dev_type = %d\n",
__func__, dfu->dev_type);
return -EINVAL;
}
switch (dfu->data.virt.dev_num) {
case PHASE_CMD:
*size = 512;
break;
case PHASE_OTP:
*size = OTP_SIZE;
break;
case PHASE_PMIC:
*size = PMIC_SIZE;
break;
}
return 0;
}
bool stm32prog_usb_loop(struct stm32prog_data *data, int dev)
{
int ret;
bool result;
/* USB download gadget for STM32 Programmer */
char product[128];
snprintf(product, sizeof(product),
"USB download gadget@Device ID /0x%03X, @Revision ID /0x%04X",
get_cpu_dev(), get_cpu_rev());
g_dnl_set_product(product);
if (stm32prog_data->phase == PHASE_FLASHLAYOUT) {
ret = run_usb_dnl_gadget(dev, "usb_dnl_dfu");
if (ret || stm32prog_data->phase == PHASE_DO_RESET)
return ret;
/* prepare the second enumeration with the FlashLayout */
if (stm32prog_data->phase == PHASE_FLASHLAYOUT)
stm32prog_dfu_init(data);
/* found next selected partition */
stm32prog_next_phase(data);
}
ret = run_usb_dnl_gadget(dev, "usb_dnl_dfu");
result = !!(ret) || (stm32prog_data->phase == PHASE_DO_RESET);
g_dnl_set_product(NULL);
return result;
}
int g_dnl_get_board_bcd_device_number(int gcnum)
{
pr_debug("%s\n", __func__);
return 0x200;
}
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