--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2015 by Uwe Bonnes *
+ * bon@elektron.ikp.physik.tu-darmstadt.de *
+ *
+ * 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. *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "imp.h"
+#include <helper/binarybuffer.h>
+#include <target/algorithm.h>
+#include <target/armv7m.h>
+
+/* STM32L4xxx series for reference.
+ *
+ * RM0351
+ * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/reference_manual/DM00083560.pdf
+ *
+ * STM32L476RG Datasheet (for erase timing)
+ * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00108832.pdf
+ *
+ *
+ * The device has normally two banks, but on 512 and 256 kiB devices an
+ * option byte is available to map all sectors to the first bank.
+ * Both STM32 banks are treated as one OpenOCD bank, as other STM32 devices
+ * handlers do!
+ *
+ */
+
+/* Erase time can be as high as 25ms, 10x this and assume it's toast... */
+
+#define FLASH_ERASE_TIMEOUT 250
+
+#define STM32_FLASH_BASE 0x40022000
+#define STM32_FLASH_ACR 0x40022000
+#define STM32_FLASH_KEYR 0x40022008
+#define STM32_FLASH_OPTKEYR 0x4002200c
+#define STM32_FLASH_SR 0x40022010
+#define STM32_FLASH_CR 0x40022014
+#define STM32_FLASH_OPTR 0x40022020
+#define STM32_FLASH_WRP1AR 0x4002202c
+#define STM32_FLASH_WRP2AR 0x40022030
+#define STM32_FLASH_WRP1BR 0x4002204c
+#define STM32_FLASH_WRP2BR 0x40022050
+
+/* FLASH_CR register bits */
+
+#define FLASH_PG (1 << 0)
+#define FLASH_PER (1 << 1)
+#define FLASH_MER1 (1 << 2)
+#define FLASH_PAGE_SHIFT 3
+#define FLASH_CR_BKER (1 << 11)
+#define FLASH_MER2 (1 << 15)
+#define FLASH_STRT (1 << 16)
+#define FLASH_EOPIE (1 << 24)
+#define FLASH_ERRIE (1 << 25)
+#define FLASH_OPTLOCK (1 << 30)
+#define FLASH_LOCK (1 << 31)
+
+/* FLASH_SR register bits */
+
+#define FLASH_BSY (1 << 16)
+/* Fast programming not used => related errors not used*/
+#define FLASH_PGSERR (1 << 7) /* Programming sequence error */
+#define FLASH_SIZERR (1 << 6) /* Size error */
+#define FLASH_PGAERR (1 << 5) /* Programming alignment error */
+#define FLASH_WRPERR (1 << 4) /* Write protection error */
+#define FLASH_PROGERR (1 << 3) /* Programming error */
+#define FLASH_OPERR (1 << 1) /* Operation error */
+#define FLASH_EOP (1 << 0) /* End of operation */
+
+#define FLASH_ERROR (FLASH_PGSERR | FLASH_PGSERR | FLASH_PGAERR | FLASH_WRPERR | FLASH_OPERR)
+
+/* STM32_FLASH_OBR bit definitions (reading) */
+
+#define OPT_DUALBANK 21 /* dual flash bank only */
+
+/* register unlock keys */
+
+#define KEY1 0x45670123
+#define KEY2 0xCDEF89AB
+
+/* option register unlock key */
+#define OPTKEY1 0x08192A3B
+#define OPTKEY2 0x4C5D6E7F
+
+
+/* other registers */
+#define DBGMCU_IDCODE 0xE0042000
+#define FLASH_SIZE_REG 0x1FFF75E0
+
+struct stm32l4_options {
+ uint8_t RDP;
+ uint16_t bank_b_start;
+ uint8_t user_options;
+ uint8_t wpr1a_start;
+ uint8_t wpr1a_end;
+ uint8_t wpr1b_start;
+ uint8_t wpr1b_end;
+ uint8_t wpr2a_start;
+ uint8_t wpr2a_end;
+ uint8_t wpr2b_start;
+ uint8_t wpr2b_end;
+ /* Fixme: Handle PCROP */
+};
+
+struct stm32l4_flash_bank {
+ struct stm32l4_options option_bytes;
+ int probed;
+};
+
+/* flash bank stm32l4x <base> <size> 0 0 <target#>
+ */
+FLASH_BANK_COMMAND_HANDLER(stm32l4_flash_bank_command)
+{
+ struct stm32l4_flash_bank *stm32l4_info;
+
+ if (CMD_ARGC < 6)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+
+ stm32l4_info = malloc(sizeof(struct stm32l4_flash_bank));
+ if (!stm32l4_info)
+ return ERROR_FAIL; /* Checkme: What better error to use?*/
+ bank->driver_priv = stm32l4_info;
+
+ stm32l4_info->probed = 0;
+
+ return ERROR_OK;
+}
+
+static inline int stm32l4_get_flash_reg(struct flash_bank *bank, uint32_t reg)
+{
+ return reg;
+}
+
+static inline int stm32l4_get_flash_status(struct flash_bank *bank, uint32_t *status)
+{
+ struct target *target = bank->target;
+ return target_read_u32(
+ target, stm32l4_get_flash_reg(bank, STM32_FLASH_SR), status);
+}
+
+static int stm32l4_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 = stm32l4_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, stm32l4_get_flash_reg(bank, STM32_FLASH_SR),
+ status & FLASH_ERROR);
+ }
+ return retval;
+}
+
+static int stm32l4_unlock_reg(struct target *target)
+{
+ uint32_t ctrl;
+
+ /* first check if not already unlocked
+ * otherwise writing on STM32_FLASH_KEYR will fail
+ */
+ int retval = target_read_u32(target, STM32_FLASH_CR, &ctrl);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if ((ctrl & FLASH_LOCK) == 0)
+ return ERROR_OK;
+
+ /* unlock flash registers */
+ 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;
+
+ retval = target_read_u32(target, STM32_FLASH_CR, &ctrl);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (ctrl & FLASH_LOCK) {
+ LOG_ERROR("flash not unlocked STM32_FLASH_CR: %" PRIx32, ctrl);
+ return ERROR_TARGET_FAILURE;
+ }
+
+ return ERROR_OK;
+}
+
+static int stm32l4_unlock_option_reg(struct target *target)
+{
+ uint32_t ctrl;
+
+ int retval = target_read_u32(target, STM32_FLASH_CR, &ctrl);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if ((ctrl & FLASH_OPTLOCK) == 0)
+ return ERROR_OK;
+
+ /* unlock option registers */
+ retval = target_write_u32(target, STM32_FLASH_OPTKEYR, OPTKEY1);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = target_write_u32(target, STM32_FLASH_OPTKEYR, OPTKEY2);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = target_read_u32(target, STM32_FLASH_CR, &ctrl);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (ctrl & FLASH_OPTLOCK) {
+ LOG_ERROR("options not unlocked STM32_FLASH_CR: %" PRIx32, ctrl);
+ return ERROR_TARGET_FAILURE;
+ }
+
+ return ERROR_OK;
+}
+
+static int stm32l4_read_options(struct flash_bank *bank)
+{
+ uint32_t optiondata;
+ struct stm32l4_flash_bank *stm32l4_info = NULL;
+ struct target *target = bank->target;
+
+ stm32l4_info = bank->driver_priv;
+
+ /* read current option bytes */
+ int retval = target_read_u32(target, STM32_FLASH_OPTR, &optiondata);
+ if (retval != ERROR_OK)
+ return retval;
+
+ stm32l4_info->option_bytes.user_options = (optiondata >> 8) & 0x3ffff;
+ stm32l4_info->option_bytes.RDP = optiondata & 0xff;
+
+ retval = target_read_u32(target, STM32_FLASH_WRP1AR, &optiondata);
+ if (retval != ERROR_OK)
+ return retval;
+ stm32l4_info->option_bytes.wpr1a_start = optiondata & 0xff;
+ stm32l4_info->option_bytes.wpr1a_end = (optiondata >> 16) & 0xff;
+
+ retval = target_read_u32(target, STM32_FLASH_WRP2AR, &optiondata);
+ if (retval != ERROR_OK)
+ return retval;
+ stm32l4_info->option_bytes.wpr2a_start = optiondata & 0xff;
+ stm32l4_info->option_bytes.wpr2a_end = (optiondata >> 16) & 0xff;
+
+ retval = target_read_u32(target, STM32_FLASH_WRP1BR, &optiondata);
+ if (retval != ERROR_OK)
+ return retval;
+ stm32l4_info->option_bytes.wpr1b_start = optiondata & 0xff;
+ stm32l4_info->option_bytes.wpr1b_end = (optiondata >> 16) & 0xff;
+
+ retval = target_read_u32(target, STM32_FLASH_WRP2BR, &optiondata);
+ if (retval != ERROR_OK)
+ return retval;
+ stm32l4_info->option_bytes.wpr2b_start = optiondata & 0xff;
+ stm32l4_info->option_bytes.wpr2b_end = (optiondata >> 16) & 0xff;
+
+ if (stm32l4_info->option_bytes.RDP != 0xAA)
+ LOG_INFO("Device Security Bit Set");
+
+ return ERROR_OK;
+}
+
+static int stm32l4_write_options(struct flash_bank *bank)
+{
+ struct stm32l4_flash_bank *stm32l4_info = NULL;
+ struct target *target = bank->target;
+ uint32_t optiondata;
+
+ stm32l4_info = bank->driver_priv;
+
+ (void) optiondata;
+ (void) stm32l4_info;
+
+ int retval = stm32l4_unlock_option_reg(target);
+ if (retval != ERROR_OK)
+ return retval;
+ /* FIXME: Implement Option writing!*/
+ return ERROR_OK;
+}
+
+static int stm32l4_protect_check(struct flash_bank *bank)
+{
+ struct stm32l4_flash_bank *stm32l4_info = bank->driver_priv;
+
+ /* read write protection settings */
+ int retval = stm32l4_read_options(bank);
+ if (retval != ERROR_OK) {
+ LOG_DEBUG("unable to read option bytes");
+ return retval;
+ }
+
+ for (int i = 0; i < bank->num_sectors; i++) {
+ if (i < stm32l4_info->option_bytes.bank_b_start) {
+ if (((i >= stm32l4_info->option_bytes.wpr1a_start) &&
+ (i <= stm32l4_info->option_bytes.wpr1a_end)) ||
+ ((i >= stm32l4_info->option_bytes.wpr2a_start) &&
+ (i <= stm32l4_info->option_bytes.wpr2a_end)))
+ bank->sectors[i].is_protected = 1;
+ else
+ bank->sectors[i].is_protected = 0;
+ } else {
+ uint8_t snb;
+ snb = i - stm32l4_info->option_bytes.bank_b_start + 256;
+ if (((snb >= stm32l4_info->option_bytes.wpr1b_start) &&
+ (snb <= stm32l4_info->option_bytes.wpr1b_end)) ||
+ ((snb >= stm32l4_info->option_bytes.wpr2b_start) &&
+ (snb <= stm32l4_info->option_bytes.wpr2b_end)))
+ bank->sectors[i].is_protected = 1;
+ else
+ bank->sectors[i].is_protected = 0;
+ }
+ }
+ return ERROR_OK;
+}
+
+static int stm32l4_erase(struct flash_bank *bank, int first, int last)
+{
+ struct target *target = bank->target;
+ int i;
+
+ assert(first < bank->num_sectors);
+ assert(last < bank->num_sectors);
+
+ if (bank->target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ int retval;
+ retval = stm32l4_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 PER bit and select the page and bank
+ you wish to erase in the FLASH_CR register
+ 3. Set the STRT bit in the FLASH_CR register
+ 4. Wait for the BSY bit to be cleared
+ */
+ struct stm32l4_flash_bank *stm32l4_info = bank->driver_priv;
+
+ for (i = first; i <= last; i++) {
+ uint32_t erase_flags;
+ erase_flags = FLASH_PER | FLASH_STRT;
+
+ if (i >= stm32l4_info->option_bytes.bank_b_start) {
+ uint8_t snb;
+ snb = (i - stm32l4_info->option_bytes.bank_b_start) + 256;
+ erase_flags |= snb << FLASH_PAGE_SHIFT | FLASH_CR_BKER;
+ } else
+ erase_flags |= i << FLASH_PAGE_SHIFT;
+ retval = target_write_u32(target,
+ stm32l4_get_flash_reg(bank, STM32_FLASH_CR), erase_flags);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = stm32l4_wait_status_busy(bank, FLASH_ERASE_TIMEOUT);
+ if (retval != ERROR_OK)
+ return retval;
+
+ bank->sectors[i].is_erased = 1;
+ }
+
+ retval = target_write_u32(
+ target, stm32l4_get_flash_reg(bank, STM32_FLASH_CR), FLASH_LOCK);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return ERROR_OK;
+}
+
+static int stm32l4_protect(struct flash_bank *bank, int set, int first, int last)
+{
+ struct target *target = bank->target;
+ struct stm32l4_flash_bank *stm32l4_info = bank->driver_priv;
+
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ /* read protection settings */
+ int retval = stm32l4_read_options(bank);
+ if (retval != ERROR_OK) {
+ LOG_DEBUG("unable to read option bytes");
+ return retval;
+ }
+
+ (void)stm32l4_info;
+ /* FIXME: Write First and last in a valid WRPxx_start/end combo*/
+ retval = stm32l4_write_options(bank);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return ERROR_OK;
+}
+
+/* Count is in halfwords */
+static int stm32l4_write_block(struct flash_bank *bank, const uint8_t *buffer,
+ uint32_t offset, uint32_t count)
+{
+ struct target *target = bank->target;
+ uint32_t buffer_size = 16384;
+ struct working_area *write_algorithm;
+ 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 contrib/loaders/flash/stm32l4x.S for source and
+ * hints how to generate the data!
+ */
+
+ static const uint8_t stm32l4_flash_write_code[] = {
+ 0xd0, 0xf8, 0x00, 0x80, 0xb8, 0xf1, 0x00, 0x0f, 0x22, 0xd0, 0x47, 0x68,
+ 0xb8, 0xeb, 0x07, 0x06, 0x07, 0x2e, 0xf5, 0xd3, 0xdf, 0xf8, 0x3c, 0x60,
+ 0x66, 0x61, 0x57, 0xf8, 0x04, 0x6b, 0x42, 0xf8, 0x04, 0x6b, 0x57, 0xf8,
+ 0x04, 0x6b, 0x42, 0xf8, 0x04, 0x6b, 0xbf, 0xf3, 0x4f, 0x8f, 0x26, 0x69,
+ 0x16, 0xf4, 0x80, 0x3f, 0xfb, 0xd1, 0x16, 0xf0, 0xfa, 0x0f, 0x07, 0xd1,
+ 0x8f, 0x42, 0x28, 0xbf, 0x00, 0xf1, 0x08, 0x07, 0x47, 0x60, 0x01, 0x3b,
+ 0x13, 0xb1, 0xd9, 0xe7, 0x00, 0x21, 0x41, 0x60, 0x30, 0x46, 0x00, 0xbe,
+ 0x01, 0x00, 0x00, 0x00
+ };
+
+ if (target_alloc_working_area(target, sizeof(stm32l4_flash_write_code),
+ &write_algorithm) != ERROR_OK) {
+ LOG_WARNING("no working area available, can't do block memory writes");
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ };
+
+ retval = target_write_buffer(target, write_algorithm->address,
+ sizeof(stm32l4_flash_write_code),
+ stm32l4_flash_write_code);
+ if (retval != 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) {
+ /* we already allocated the writing code, but failed to get a
+ * buffer, free the algorithm */
+ target_free_working_area(target, 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 = ARM_MODE_THREAD;
+
+ init_reg_param(®_params[0], "r0", 32, PARAM_IN_OUT); /* buffer start, status (out) */
+ init_reg_param(®_params[1], "r1", 32, PARAM_OUT); /* buffer end */
+ init_reg_param(®_params[2], "r2", 32, PARAM_OUT); /* target address */
+ init_reg_param(®_params[3], "r3", 32, PARAM_OUT); /* count (double word-64bit) */
+ init_reg_param(®_params[4], "r4", 32, PARAM_OUT); /* flash base */
+
+ buf_set_u32(reg_params[0].value, 0, 32, source->address);
+ buf_set_u32(reg_params[1].value, 0, 32, source->address + source->size);
+ buf_set_u32(reg_params[2].value, 0, 32, address);
+ buf_set_u32(reg_params[3].value, 0, 32, count / 4);
+ buf_set_u32(reg_params[4].value, 0, 32, STM32_FLASH_BASE);
+
+ retval = target_run_flash_async_algorithm(target, buffer, count, 2,
+ 0, NULL,
+ 5, reg_params,
+ source->address, source->size,
+ write_algorithm->address, 0,
+ &armv7m_info);
+
+ if (retval == ERROR_FLASH_OPERATION_FAILED) {
+ LOG_ERROR("error executing stm32l4 flash write algorithm");
+
+ uint32_t error = buf_get_u32(reg_params[0].value, 0, 32) & FLASH_ERROR;
+
+ if (error & FLASH_WRPERR)
+ LOG_ERROR("flash memory write protected");
+
+ if (error != 0) {
+ LOG_ERROR("flash write failed = %08" PRIx32, error);
+ /* Clear but report errors */
+ target_write_u32(target, STM32_FLASH_SR, error);
+ retval = ERROR_FAIL;
+ }
+ }
+
+ target_free_working_area(target, source);
+ target_free_working_area(target, 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 stm32l4_write(struct flash_bank *bank, const uint8_t *buffer,
+ uint32_t offset, uint32_t count)
+{
+ struct target *target = bank->target;
+ int retval;
+
+ if (bank->target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (offset & 0x7) {
+ LOG_WARNING("offset 0x%" PRIx32 " breaks required 8-byte alignment",
+ offset);
+ return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
+ }
+
+ if (count & 0x7) {
+ LOG_WARNING("Padding %d bytes to keep 8-byte write size",
+ count & 7);
+ count = (count + 7) & ~7;
+ /* This pads the write chunk with random bytes by overrunning the
+ * write buffer. Padding with the erased pattern 0xff is purely
+ * cosmetical, as 8-byte flash words are ECC secured and the first
+ * write will program the ECC bits. A second write would need
+ * to reprogramm these ECC bits.
+ * But this can only be done after erase!
+ */
+ }
+
+ retval = stm32l4_unlock_reg(target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* Only full double words (8-byte) can be programmed*/
+ retval = stm32l4_write_block(bank, buffer, offset, count / 2);
+ if (retval != ERROR_OK) {
+ LOG_WARNING("block write failed");
+ return retval;
+ }
+
+ LOG_WARNING("block write succeeded");
+ return target_write_u32(target, STM32_FLASH_CR, FLASH_LOCK);
+}
+
+static int stm32l4_probe(struct flash_bank *bank)
+{
+ struct target *target = bank->target;
+ struct stm32l4_flash_bank *stm32l4_info = bank->driver_priv;
+ int i;
+ uint16_t flash_size_in_kb = 0xffff;
+ uint32_t device_id;
+ uint32_t options;
+ uint32_t base_address = 0x08000000;
+
+ stm32l4_info->probed = 0;
+
+ /* read stm32 device id register */
+ int retval = target_read_u32(target, DBGMCU_IDCODE, &device_id);
+ if (retval != ERROR_OK)
+ return retval;
+ LOG_INFO("device id = 0x%08" PRIx32 "", device_id);
+
+ /* set max flash size depending on family */
+ switch (device_id & 0xfff) {
+ case 0x415:
+ break;
+ default:
+ LOG_WARNING("Cannot identify target as a STM32L4 family.");
+ return ERROR_FAIL;
+ }
+
+ /* get flash size from target. */
+ retval = target_read_u16(target, FLASH_SIZE_REG, &flash_size_in_kb);
+
+ /* get options to for DUAL BANK. */
+ retval = target_read_u32(target, STM32_FLASH_OPTR, &options);
+
+ /* only devices with < 1024 kiB may be set to single bank dual banks */
+ if ((flash_size_in_kb == 1024) || !(options & OPT_DUALBANK))
+ stm32l4_info->option_bytes.bank_b_start = 256;
+ else
+ stm32l4_info->option_bytes.bank_b_start = flash_size_in_kb << 9;
+
+ LOG_INFO("flash size = %dkbytes", flash_size_in_kb);
+
+ /* did we assign flash size? */
+ assert((flash_size_in_kb != 0xffff) && flash_size_in_kb);
+
+ /* calculate numbers of pages */
+ int num_pages = flash_size_in_kb / 2;
+
+ /* check that calculation result makes sense */
+ assert(num_pages > 0);
+
+ if (bank->sectors) {
+ free(bank->sectors);
+ bank->sectors = NULL;
+ }
+
+ bank->base = base_address;
+ bank->size = num_pages * (1 << 11);
+ bank->num_sectors = num_pages;
+ bank->sectors = malloc(sizeof(struct flash_sector) * num_pages);
+ if (!bank->sectors)
+ return ERROR_FAIL; /* Checkme: What better error to use?*/
+
+ for (i = 0; i < num_pages; i++) {
+ bank->sectors[i].offset = i << 11;
+ bank->sectors[i].size = 1 << 11;
+ bank->sectors[i].is_erased = -1;
+ bank->sectors[i].is_protected = 1;
+ }
+
+ stm32l4_info->probed = 1;
+
+ return ERROR_OK;
+}
+
+static int stm32l4_auto_probe(struct flash_bank *bank)
+{
+ struct stm32l4_flash_bank *stm32l4_info = bank->driver_priv;
+ if (stm32l4_info->probed)
+ return ERROR_OK;
+ return stm32l4_probe(bank);
+}
+
+static int get_stm32l4_info(struct flash_bank *bank, char *buf, int buf_size)
+{
+ struct target *target = bank->target;
+ uint32_t dbgmcu_idcode;
+
+ /* read stm32 device id register */
+ int retval = target_read_u32(target, DBGMCU_IDCODE, &dbgmcu_idcode);
+ if (retval != ERROR_OK)
+ return retval;
+
+ uint16_t device_id = dbgmcu_idcode & 0xffff;
+ uint8_t rev_id = dbgmcu_idcode >> 28;
+ uint8_t rev_minor = 0;
+ int i;
+
+ for (i = 16; i < 28; i++) {
+ if (dbgmcu_idcode & (1 << i))
+ rev_minor++;
+ else
+ break;
+ }
+
+ const char *device_str;
+
+ switch (device_id) {
+ case 0x6415:
+ device_str = "STM32L4xx";
+ break;
+
+ default:
+ snprintf(buf, buf_size, "Cannot identify target as a STM32L4\n");
+ return ERROR_FAIL;
+ }
+
+ snprintf(buf, buf_size, "%s - Rev: %1d.%02d",
+ device_str, rev_id, rev_minor);
+
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(stm32l4_handle_lock_command)
+{
+ struct target *target = NULL;
+ struct stm32l4_flash_bank *stm32l4_info = NULL;
+
+ if (CMD_ARGC < 1)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+
+ struct flash_bank *bank;
+ int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
+ if (ERROR_OK != retval)
+ return retval;
+
+ stm32l4_info = bank->driver_priv;
+ target = bank->target;
+
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (stm32l4_read_options(bank) != ERROR_OK) {
+ command_print(CMD_CTX, "%s failed to read options",
+ bank->driver->name);
+ return ERROR_OK;
+ }
+
+ /* set readout protection */
+ stm32l4_info->option_bytes.RDP = 0;
+
+ if (stm32l4_write_options(bank) != ERROR_OK) {
+ command_print(CMD_CTX, "%s failed to lock device", bank->driver->name);
+ return ERROR_OK;
+ }
+
+ command_print(CMD_CTX, "%s locked", bank->driver->name);
+
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(stm32l4_handle_unlock_command)
+{
+ struct target *target = NULL;
+ struct stm32l4_flash_bank *stm32l4_info = NULL;
+
+ if (CMD_ARGC < 1)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+
+ struct flash_bank *bank;
+ int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
+ if (ERROR_OK != retval)
+ return retval;
+
+ stm32l4_info = bank->driver_priv;
+ target = bank->target;
+
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (stm32l4_read_options(bank) != ERROR_OK) {
+ command_print(CMD_CTX, "%s failed to read options", bank->driver->name);
+ return ERROR_OK;
+ }
+
+ /* clear readout protection and complementary option bytes
+ * this will also force a device unlock if set */
+ stm32l4_info->option_bytes.RDP = 0xAA;
+
+ if (stm32l4_write_options(bank) != ERROR_OK) {
+ command_print(CMD_CTX, "%s failed to unlock device",
+ bank->driver->name);
+ return ERROR_OK;
+ }
+
+ command_print(CMD_CTX, "%s unlocked.\n"
+ "INFO: a reset or power cycle is required "
+ "for the new settings to take effect.", bank->driver->name);
+
+ return ERROR_OK;
+}
+
+static int stm32l4_mass_erase(struct flash_bank *bank, uint32_t action)
+{
+ int retval;
+ struct target *target = bank->target;
+
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ retval = stm32l4_unlock_reg(target);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* mass erase flash memory */
+ retval = target_write_u32(
+ target, stm32l4_get_flash_reg(bank, STM32_FLASH_CR), action);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = target_write_u32(
+ target, stm32l4_get_flash_reg(bank, STM32_FLASH_CR),
+ action | FLASH_STRT);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = stm32l4_wait_status_busy(bank, FLASH_ERASE_TIMEOUT);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = target_write_u32(
+ target, stm32l4_get_flash_reg(bank, STM32_FLASH_CR), FLASH_LOCK);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(stm32l4_handle_mass_erase_command)
+{
+ int i;
+ uint32_t action;
+
+ if (CMD_ARGC < 1) {
+ command_print(CMD_CTX, "stm32x mass_erase <STM32L4 bank>");
+ return ERROR_COMMAND_SYNTAX_ERROR;
+ }
+
+ struct flash_bank *bank;
+ int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
+ if (ERROR_OK != retval)
+ return retval;
+
+ action = FLASH_MER1 | FLASH_MER2;
+ retval = stm32l4_mass_erase(bank, action);
+ if (retval == ERROR_OK) {
+ /* set all sectors as erased */
+ for (i = 0; i < bank->num_sectors; i++)
+ bank->sectors[i].is_erased = 1;
+
+ command_print(CMD_CTX, "stm32x mass erase complete");
+ } else {
+ command_print(CMD_CTX, "stm32x mass erase failed");
+ }
+
+ return retval;
+}
+
+static const struct command_registration stm32l4_exec_command_handlers[] = {
+ {
+ .name = "lock",
+ .handler = stm32l4_handle_lock_command,
+ .mode = COMMAND_EXEC,
+ .usage = "bank_id",
+ .help = "Lock entire flash device.",
+ },
+ {
+ .name = "unlock",
+ .handler = stm32l4_handle_unlock_command,
+ .mode = COMMAND_EXEC,
+ .usage = "bank_id",
+ .help = "Unlock entire protected flash device.",
+ },
+ {
+ .name = "mass_erase",
+ .handler = stm32l4_handle_mass_erase_command,
+ .mode = COMMAND_EXEC,
+ .usage = "bank_id",
+ .help = "Erase entire flash device.",
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+static const struct command_registration stm32l4_command_handlers[] = {
+ {
+ .name = "stm32l4x",
+ .mode = COMMAND_ANY,
+ .help = "stm32l4x flash command group",
+ .usage = "",
+ .chain = stm32l4_exec_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+struct flash_driver stm32l4x_flash = {
+ .name = "stm32l4x",
+ .commands = stm32l4_command_handlers,
+ .flash_bank_command = stm32l4_flash_bank_command,
+ .erase = stm32l4_erase,
+ .protect = stm32l4_protect,
+ .write = stm32l4_write,
+ .read = default_flash_read,
+ .probe = stm32l4_probe,
+ .auto_probe = stm32l4_auto_probe,
+ .erase_check = default_flash_blank_check,
+ .protect_check = stm32l4_protect_check,
+ .info = get_stm32l4_info,
+};
projects / openocd / commitdiff