+++ /dev/null
-/***************************************************************************
- * Copyright (C) 2005 by Dominic Rath *
- * Dominic.Rath@gmx.de *
- * *
- * Copyright (C) 2008 by Spencer Oliver *
- * spen@spen-soft.co.uk *
- * *
- * Copyright (C) 2011 Øyvind Harboe *
- * oyvind.harboe@zylin.com *
- * *
- * This program is free software; you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program; if not, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
- ***************************************************************************/
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "imp.h"
-#include <helper/binarybuffer.h>
-#include <target/algorithm.h>
-#include <target/armv7m.h>
-
-/* Regarding performance:
- *
- * Short story - it might be best to leave the performance at
- * current levels.
- *
- * You may see a jump in speed if you change to using
- * 32bit words for the block programming.
- *
- * Its a shame you cannot use the double word as its
- * even faster - but you require external VPP for that mode.
- *
- * Having said all that 16bit writes give us the widest vdd
- * operating range, so may be worth adding a note to that effect.
- *
- */
-
-
-/* Danger!!!! The STM32F1xxxx and STM32F2xxxx series actually have
- * quite different flash controllers.
- *
- * What's more scary is that the names of the registers and their
- * addresses are the same, but the actual bits and what they do are
- * can be very different.
- *
- * To reduce testing complexity and dangers of regressions,
- * a seperate file is used for stm32fx2222.
- *
- * 1mByte part with 4 x 16, 1 x 64, 7 x 128kBytes sectors
- *
- * What's the protection page size???
- *
- * Tested with STM3220F-EVAL board.
- *
- * STM32F21xx series for reference.
- *
- * RM0033
- * http://www.st.com/internet/mcu/product/250192.jsp
- *
- * PM0059
- * www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/PROGRAMMING_MANUAL/CD00233952.pdf
- *
- * STM32F1xxx series - notice that this code was copy, pasted and knocked
- * into a stm32f2xxx driver, so in case something has been converted or
- * bugs haven't been fixed, here are the original manuals:
- *
- * RM0008 - Reference manual
- *
- * RM0042, the Flash programming manual for low-, medium- high-density and
- * connectivity line STM32F10xxx devices
- *
- * PM0068, the Flash programming manual for XL-density STM32F10xxx devices.
- *
- */
-
- // Erase time can be as high as 1000ms, 10x this and it's toast...
-#define FLASH_ERASE_TIMEOUT 10000
-#define FLASH_WRITE_TIMEOUT 5
-
-
-#define STM32_FLASH_BASE 0x40023c00
-#define STM32_FLASH_ACR 0x40023c00
-#define STM32_FLASH_KEYR 0x40023c04
-#define STM32_FLASH_OPTKEYR 0x40023c08
-#define STM32_FLASH_SR 0x40023c0C
-#define STM32_FLASH_CR 0x40023c10
-#define STM32_FLASH_OPTCR 0x40023c14
-#define STM32_FLASH_OBR 0x40023c1C
-
-
-
-/* option byte location */
-
-#define STM32_OB_RDP 0x1FFFF800
-#define STM32_OB_USER 0x1FFFF802
-#define STM32_OB_DATA0 0x1FFFF804
-#define STM32_OB_DATA1 0x1FFFF806
-#define STM32_OB_WRP0 0x1FFFF808
-#define STM32_OB_WRP1 0x1FFFF80A
-#define STM32_OB_WRP2 0x1FFFF80C
-#define STM32_OB_WRP3 0x1FFFF80E
-
-/* FLASH_CR register bits */
-
-#define FLASH_PG (1 << 0)
-#define FLASH_SER (1 << 1)
-#define FLASH_MER (1 << 2)
-#define FLASH_STRT (1 << 16)
-#define FLASH_PSIZE_8 (0 << 8)
-#define FLASH_PSIZE_16 (1 << 8)
-#define FLASH_PSIZE_32 (2 << 8)
-#define FLASH_PSIZE_64 (3 << 8)
-#define FLASH_SNB(a) ((a) << 3)
-#define FLASH_LOCK (1 << 31)
-
-/* FLASH_SR register bits */
-
-#define FLASH_BSY (1 << 16)
-#define FLASH_PGSERR (1 << 7) // Programming sequence error
-#define FLASH_PGPERR (1 << 6) // Programming parallelism error
-#define FLASH_PGAERR (1 << 5) // Programming alignment error
-#define FLASH_WRPERR (1 << 4) // Write protection error
-#define FLASH_OPERR (1 << 1) // Operation error
-
-#define FLASH_ERROR (FLASH_PGSERR | FLASH_PGPERR | FLASH_PGAERR| FLASH_WRPERR| FLASH_OPERR)
-
-/* STM32_FLASH_OBR bit definitions (reading) */
-
-#define OPT_ERROR 0
-#define OPT_READOUT 1
-#define OPT_RDWDGSW 2
-#define OPT_RDRSTSTOP 3
-#define OPT_RDRSTSTDBY 4
-#define OPT_BFB2 5 /* dual flash bank only */
-
-/* register unlock keys */
-
-#define KEY1 0x45670123
-#define KEY2 0xCDEF89AB
-
-struct stm32x_flash_bank
-{
- struct working_area *write_algorithm;
- int probed;
-};
-
-
-/* flash bank stm32x <base> <size> 0 0 <target#>
- */
-FLASH_BANK_COMMAND_HANDLER(stm32x_flash_bank_command)
-{
- struct stm32x_flash_bank *stm32x_info;
-
- if (CMD_ARGC < 6)
- {
- LOG_WARNING("incomplete flash_bank stm32x configuration");
- return ERROR_FLASH_BANK_INVALID;
- }
-
- stm32x_info = malloc(sizeof(struct stm32x_flash_bank));
- bank->driver_priv = stm32x_info;
-
- stm32x_info->write_algorithm = NULL;
- stm32x_info->probed = 0;
-
- return ERROR_OK;
-}
-
-static inline int stm32x_get_flash_reg(struct flash_bank *bank, uint32_t reg)
-{
- return reg;
-}
-
-static inline int stm32x_get_flash_status(struct flash_bank *bank, uint32_t *status)
-{
- struct target *target = bank->target;
- return target_read_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_SR), status);
-}
-
-static int stm32x_wait_status_busy(struct flash_bank *bank, int timeout)
-{
- struct target *target = bank->target;
- uint32_t status;
- int retval = ERROR_OK;
-
- /* wait for busy to clear */
- for (;;)
- {
- retval = stm32x_get_flash_status(bank, &status);
- if (retval != ERROR_OK)
- return retval;
- LOG_DEBUG("status: 0x%" PRIx32 "", status);
- if ((status & FLASH_BSY) == 0)
- break;
- if (timeout-- <= 0)
- {
- LOG_ERROR("timed out waiting for flash");
- return ERROR_FAIL;
- }
- alive_sleep(1);
- }
-
-
- if (status & FLASH_WRPERR)
- {
- LOG_ERROR("stm32x device protected");
- retval = ERROR_FAIL;
- }
-
- /* Clear but report errors */
- if (status & FLASH_ERROR)
- {
- /* If this operation fails, we ignore it and report the original
- * retval
- */
- target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_SR),
- status & FLASH_ERROR);
- }
- return retval;
-}
-
-static int stm32x_unlock_reg(struct target *target)
-{
- /* unlock flash registers */
- int retval = target_write_u32(target, STM32_FLASH_KEYR, KEY1);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_write_u32(target, STM32_FLASH_KEYR, KEY2);
- if (retval != ERROR_OK)
- return retval;
- return ERROR_OK;
-}
-
-static int stm32x_protect_check(struct flash_bank *bank)
-{
- return ERROR_OK;
-}
-
-static int stm32x_erase(struct flash_bank *bank, int first, int last)
-{
- struct target *target = bank->target;
- int i;
-
- if (bank->target->state != TARGET_HALTED)
- {
- LOG_ERROR("Target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- int retval;
- retval = stm32x_unlock_reg(target);
- if (retval != ERROR_OK)
- return retval;
-
- /*
- Sector Erase
- To erase a sector, follow the procedure below:
- 1. Check that no Flash memory operation is ongoing by checking the BSY bit in the
- FLASH_SR register
- 2. Set the SER bit and select the sector (out of the 12 sectors in the main memory block)
- you wish to erase (SNB) in the FLASH_CR register
- 3. Set the STRT bit in the FLASH_CR register
- 4. Wait for the BSY bit to be cleared
- */
-
- for (i = first; i <= last; i++)
- {
- retval = target_write_u32(target,
- stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_SER | FLASH_SNB(i) | FLASH_STRT);
- if (retval != ERROR_OK)
- return retval;
-
- retval = stm32x_wait_status_busy(bank, FLASH_ERASE_TIMEOUT);
- if (retval != ERROR_OK)
- return retval;
-
- bank->sectors[i].is_erased = 1;
- }
-
- retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_LOCK);
- if (retval != ERROR_OK)
- return retval;
-
- return ERROR_OK;
-}
-
-static int stm32x_protect(struct flash_bank *bank, int set, int first, int last)
-{
- return ERROR_OK;
-}
-
-static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer,
- uint32_t offset, uint32_t count)
-{
- struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
- struct target *target = bank->target;
- uint32_t buffer_size = 16384;
- struct working_area *source;
- uint32_t address = bank->base + offset;
- struct reg_param reg_params[5];
- struct armv7m_algorithm armv7m_info;
- int retval = ERROR_OK;
-
- /* see contib/loaders/flash/stm32x.s for src */
-
- static const uint16_t stm32x_flash_write_code_16[] = {
-// 00000000 <write>:
- 0x4b07, // ldr r3, [pc, #28] (20 <STM32_PROG16>)
- 0x6123, // str r3, [r4, #16]
- 0xf830, 0x3b02, //ldrh.w r3, [r0], #2
- 0xf821, 0x3b02, //strh.w r3, [r1], #2
-
- //0000000c <busy>:
- 0x68e3, //ldr r3, [r4, #12]
-0xf413, 0x3f80, // tst.w r3, #65536 ; 0x10000
-0xd0fb, //beq.n c <busy>
-0xf013, 0x0ff0, //tst.w r3, #240 ; 0xf0
-0xd101, //bne.n 1e <exit>
-0x3a01, //subs r2, #1
-0xd1f0, //bne.n 0 <write>
- //0000001e <exit>:
- 0xbe00, // bkpt 0x0000
-
- //00000020 <STM32_PROG16>:
- 0x0101, 0x0000, // .word 0x00000101
-
- };
-
- // Flip endian
- uint8_t stm32x_flash_write_code[sizeof(stm32x_flash_write_code_16)*2];
- for (unsigned i = 0; i < sizeof(stm32x_flash_write_code_16) / 2; i++)
- {
- stm32x_flash_write_code[i*2 + 0] = stm32x_flash_write_code_16[i] & 0xff;
- stm32x_flash_write_code[i*2 + 1] = (stm32x_flash_write_code_16[i] >> 8) & 0xff;
- }
-
- if (target_alloc_working_area(target, sizeof(stm32x_flash_write_code),
- &stm32x_info->write_algorithm) != ERROR_OK)
- {
- LOG_WARNING("no working area available, can't do block memory writes");
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- };
-
- if ((retval = target_write_buffer(target, stm32x_info->write_algorithm->address,
- sizeof(stm32x_flash_write_code),
- (uint8_t*)stm32x_flash_write_code)) != ERROR_OK)
- return retval;
-
- /* memory buffer */
- while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK)
- {
- buffer_size /= 2;
- if (buffer_size <= 256)
- {
- /* if we already allocated the writing code, but failed to get a
- * buffer, free the algorithm */
- if (stm32x_info->write_algorithm)
- target_free_working_area(target, stm32x_info->write_algorithm);
-
- LOG_WARNING("no large enough working area available, can't do block memory writes");
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
- };
-
- armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
- armv7m_info.core_mode = ARMV7M_MODE_ANY;
-
- init_reg_param(®_params[0], "r0", 32, PARAM_OUT);
- init_reg_param(®_params[1], "r1", 32, PARAM_OUT);
- init_reg_param(®_params[2], "r2", 32, PARAM_OUT);
- init_reg_param(®_params[3], "r3", 32, PARAM_IN_OUT);
- init_reg_param(®_params[4], "r4", 32, PARAM_OUT);
-
- while (count > 0)
- {
- uint32_t thisrun_count = (count > (buffer_size / 2)) ?
- (buffer_size / 2) : count;
-
- if ((retval = target_write_buffer(target, source->address,
- thisrun_count * 2, buffer)) != ERROR_OK)
- break;
-
- buf_set_u32(reg_params[0].value, 0, 32, source->address);
- buf_set_u32(reg_params[1].value, 0, 32, address);
- buf_set_u32(reg_params[2].value, 0, 32, thisrun_count);
- // R3 is a return value only
- buf_set_u32(reg_params[4].value, 0, 32, STM32_FLASH_BASE);
-
- if ((retval = target_run_algorithm(target, 0, NULL,
- sizeof(reg_params) / sizeof(*reg_params),
- reg_params,
- stm32x_info->write_algorithm->address,
- 0,
- 10000, &armv7m_info)) != ERROR_OK)
- {
- LOG_ERROR("error executing stm32x flash write algorithm");
- break;
- }
-
- uint32_t error = buf_get_u32(reg_params[3].value, 0, 32) & FLASH_ERROR;
-
- if (error & FLASH_WRPERR)
- {
- LOG_ERROR("flash memory write protected");
- }
-
- if (error != 0)
- {
- LOG_ERROR("flash write failed = %08x", error);
- /* Clear but report errors */
- target_write_u32(target, STM32_FLASH_SR, error);
- retval = ERROR_FAIL;
- break;
- }
-
- buffer += thisrun_count * 2;
- address += thisrun_count * 2;
- count -= thisrun_count;
- }
-
- target_free_working_area(target, source);
- target_free_working_area(target, stm32x_info->write_algorithm);
-
- destroy_reg_param(®_params[0]);
- destroy_reg_param(®_params[1]);
- destroy_reg_param(®_params[2]);
- destroy_reg_param(®_params[3]);
- destroy_reg_param(®_params[4]);
-
- return retval;
-}
-
-static int stm32x_write(struct flash_bank *bank, uint8_t *buffer,
- uint32_t offset, uint32_t count)
-{
- struct target *target = bank->target;
- uint32_t words_remaining = (count / 2);
- uint32_t bytes_remaining = (count & 0x00000001);
- uint32_t address = bank->base + offset;
- uint32_t bytes_written = 0;
- int retval;
-
- if (bank->target->state != TARGET_HALTED)
- {
- LOG_ERROR("Target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (offset & 0x1)
- {
- LOG_WARNING("offset 0x%" PRIx32 " breaks required 2-byte alignment", offset);
- return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
- }
-
- retval = stm32x_unlock_reg(target);
- if (retval != ERROR_OK)
- return retval;
-
- /* multiple half words (2-byte) to be programmed? */
- if (words_remaining > 0)
- {
- /* try using a block write */
- if ((retval = stm32x_write_block(bank, buffer, offset, words_remaining)) != ERROR_OK)
- {
- if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
- {
- /* if block write failed (no sufficient working area),
- * we use normal (slow) single dword accesses */
- LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
- }
- }
- else
- {
- buffer += words_remaining * 2;
- address += words_remaining * 2;
- words_remaining = 0;
- }
- }
-
- if ((retval != ERROR_OK) && (retval != ERROR_TARGET_RESOURCE_NOT_AVAILABLE))
- return retval;
-
- /*
- Standard programming
- The Flash memory programming sequence is as follows:
- 1. Check that no main Flash memory operation is ongoing by checking the BSY bit in the
- FLASH_SR register.
- 2. Set the PG bit in the FLASH_CR register
- 3. Perform the data write operation(s) to the desired memory address (inside main
- memory block or OTP area):
- – – Half-word access in case of x16 parallelism
- – Word access in case of x32 parallelism
- –
- 4.
- Byte access in case of x8 parallelism
- Double word access in case of x64 parallelism
- Wait for the BSY bit to be cleared
- */
- while (words_remaining > 0)
- {
- uint16_t value;
- memcpy(&value, buffer + bytes_written, sizeof(uint16_t));
-
- retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR),
- FLASH_PG | FLASH_PSIZE_16);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_write_u16(target, address, value);
- if (retval != ERROR_OK)
- return retval;
-
- retval = stm32x_wait_status_busy(bank, FLASH_WRITE_TIMEOUT);
- if (retval != ERROR_OK)
- return retval;
-
- bytes_written += 2;
- words_remaining--;
- address += 2;
- }
-
- if (bytes_remaining)
- {
- retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR),
- FLASH_PG | FLASH_PSIZE_8);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u8(target, address, buffer[bytes_written]);
- if (retval != ERROR_OK)
- return retval;
-
- retval = stm32x_wait_status_busy(bank, FLASH_WRITE_TIMEOUT);
- if (retval != ERROR_OK)
- return retval;
- }
-
- return target_write_u32(target, STM32_FLASH_CR, FLASH_LOCK);
-}
-
-static void setup_sector(struct flash_bank *bank, int start, int num, int size)
-{
- for (int i = start; i < (start + num) ; i++)
- {
- bank->sectors[i].offset = bank->size;
- bank->sectors[i].size = size;
- bank->size += bank->sectors[i].size;
- }
-}
-
-static int stm32x_probe(struct flash_bank *bank)
-{
- struct target *target = bank->target;
- struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
- int i;
- uint16_t num_pages;
- uint32_t device_id;
- uint32_t base_address = 0x08000000;
-
- stm32x_info->probed = 0;
-
- /* read stm32 device id register */
- int retval = target_read_u32(target, 0xE0042000, &device_id);
- if (retval != ERROR_OK)
- return retval;
- LOG_INFO("device id = 0x%08" PRIx32 "", device_id);
-
- if ((device_id & 0x7ff) != 0x411)
- {
- LOG_WARNING("Cannot identify target as a STM32 family, try the other STM32 drivers.");
- return ERROR_FAIL;
- }
-
- /* sectors sizes vary, handle this in a different code path
- * than the rest.
- */
- // Uhhh.... what to use here?
-
- /* calculate numbers of pages*/
- num_pages = 4 + 1 + 7;
-
- if (bank->sectors)
- {
- free(bank->sectors);
- bank->sectors = NULL;
- }
-
- bank->base = base_address;
- bank->num_sectors = num_pages;
- bank->sectors = malloc(sizeof(struct flash_sector) * num_pages);
-
- bank->size = 0;
- setup_sector(bank, 0, 4, 16 * 1024);
- setup_sector(bank, 4, 1, 64 * 1024);
- setup_sector(bank, 4+1, 7, 128 * 1024);
-
- for (i = 0; i < num_pages; i++)
- {
- bank->sectors[i].is_erased = -1;
- bank->sectors[i].is_protected = 0;
- }
-
- LOG_INFO("flash size = %dkBytes", bank->size / 1024);
-
- stm32x_info->probed = 1;
-
- return ERROR_OK;
-}
-
-static int stm32x_auto_probe(struct flash_bank *bank)
-{
- struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
- if (stm32x_info->probed)
- return ERROR_OK;
- return stm32x_probe(bank);
-}
-
-static int get_stm32x_info(struct flash_bank *bank, char *buf, int buf_size)
-{
- struct target *target = bank->target;
- uint32_t device_id;
- int printed;
-
- /* read stm32 device id register */
- int retval = target_read_u32(target, 0xE0042000, &device_id);
- if (retval != ERROR_OK)
- return retval;
-
- if ((device_id & 0x7ff) == 0x411)
- {
- printed = snprintf(buf, buf_size, "stm32x (1mByte part) - Rev: ");
- buf += printed;
- buf_size -= printed;
-
- switch (device_id >> 16)
- {
- case 0x1000:
- snprintf(buf, buf_size, "A");
- break;
-
- case 0x2000:
- snprintf(buf, buf_size, "B");
- break;
-
- case 0x1001:
- snprintf(buf, buf_size, "Z");
- break;
-
- case 0x2001:
- snprintf(buf, buf_size, "Y");
- break;
-
- default:
- snprintf(buf, buf_size, "unknown");
- break;
- }
- }
- else
- {
- snprintf(buf, buf_size, "Cannot identify target as a stm32x\n");
- return ERROR_FAIL;
- }
-
- return ERROR_OK;
-}
-
-static const struct command_registration stm32x_exec_command_handlers[] = {
- COMMAND_REGISTRATION_DONE
-};
-
-static const struct command_registration stm32x_command_handlers[] = {
- {
- .name = "stm32f2xxx",
- .mode = COMMAND_ANY,
- .help = "stm32f2xxx flash command group",
- .chain = stm32x_exec_command_handlers,
- },
- COMMAND_REGISTRATION_DONE
-};
-
-struct flash_driver stm32xf2xxx_flash = {
- .name = "stm32f2xxx",
- .commands = stm32x_command_handlers,
- .flash_bank_command = stm32x_flash_bank_command,
- .erase = stm32x_erase,
- .protect = stm32x_protect,
- .write = stm32x_write,
- .read = default_flash_read,
- .probe = stm32x_probe,
- .auto_probe = stm32x_auto_probe,
- .erase_check = default_flash_mem_blank_check,
- .protect_check = stm32x_protect_check,
- .info = get_stm32x_info,
-};