diff options
Diffstat (limited to 'arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_usb.c')
| -rw-r--r-- | arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_usb.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_usb.c b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_usb.c new file mode 100644 index 0000000000..969245e199 --- /dev/null +++ b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_usb.c @@ -0,0 +1,230 @@ +// 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; + data->dfu_seq = 0; + 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; + data->dfu_seq = 0; + 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; +} |