|
- /***************************************************************************
- * Copyright (C) 2005 by Dominic Rath *
- * Dominic.Rath@gmx.de *
- * *
- * Copyright (C) 2008 by Spencer Oliver *
- * spen@spen-soft.co.uk *
- *
- * Copyright (C) 2011 by Erik Botö
- * erik.boto@pelagicore.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., *
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
- ***************************************************************************/
-
- #ifdef HAVE_CONFIG_H
- #include "config.h"
- #endif
-
- #include "imp.h"
- #include <helper/binarybuffer.h>
- #include <target/algorithm.h>
- #include <target/armv7m.h>
-
- /* em357 register locations */
-
- #define EM357_FLASH_ACR 0x40008000
- #define EM357_FLASH_KEYR 0x40008004
- #define EM357_FLASH_OPTKEYR 0x40008008
- #define EM357_FLASH_SR 0x4000800C
- #define EM357_FLASH_CR 0x40008010
- #define EM357_FLASH_AR 0x40008014
- #define EM357_FLASH_OBR 0x4000801C
- #define EM357_FLASH_WRPR 0x40008020
-
- #define EM357_FPEC_CLK 0x4000402c
- /* option byte location */
-
- #define EM357_OB_RDP 0x08040800
- #define EM357_OB_WRP0 0x08040808
- #define EM357_OB_WRP1 0x0804080A
- #define EM357_OB_WRP2 0x0804080C
-
- /* FLASH_CR register bits */
-
- #define FLASH_PG (1 << 0)
- #define FLASH_PER (1 << 1)
- #define FLASH_MER (1 << 2)
- #define FLASH_OPTPG (1 << 4)
- #define FLASH_OPTER (1 << 5)
- #define FLASH_STRT (1 << 6)
- #define FLASH_LOCK (1 << 7)
- #define FLASH_OPTWRE (1 << 9)
-
- /* FLASH_SR register bits */
-
- #define FLASH_BSY (1 << 0)
- #define FLASH_PGERR (1 << 2)
- #define FLASH_WRPRTERR (1 << 4)
- #define FLASH_EOP (1 << 5)
-
- /* EM357_FLASH_OBR bit definitions (reading) */
-
- #define OPT_ERROR 0
- #define OPT_READOUT 1
-
- /* register unlock keys */
-
- #define KEY1 0x45670123
- #define KEY2 0xCDEF89AB
-
- struct em357_options {
- uint16_t RDP;
- uint16_t user_options;
- uint16_t protection[3];
- };
-
- struct em357_flash_bank {
- struct em357_options option_bytes;
- int ppage_size;
- int probed;
- };
-
- static int em357_mass_erase(struct flash_bank *bank);
-
- /* flash bank em357 <base> <size> 0 0 <target#>
- */
- FLASH_BANK_COMMAND_HANDLER(em357_flash_bank_command)
- {
- struct em357_flash_bank *em357_info;
-
- if (CMD_ARGC < 6)
- return ERROR_COMMAND_SYNTAX_ERROR;
-
- em357_info = malloc(sizeof(struct em357_flash_bank));
- bank->driver_priv = em357_info;
-
- em357_info->probed = 0;
-
- return ERROR_OK;
- }
-
- static inline int em357_get_flash_status(struct flash_bank *bank, uint32_t *status)
- {
- struct target *target = bank->target;
- return target_read_u32(target, EM357_FLASH_SR, status);
- }
-
- static int em357_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 = em357_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_WRPRTERR) {
- LOG_ERROR("em357 device protected");
- retval = ERROR_FAIL;
- }
-
- if (status & FLASH_PGERR) {
- LOG_ERROR("em357 device programming failed");
- retval = ERROR_FAIL;
- }
-
- /* Clear but report errors */
- if (status & (FLASH_WRPRTERR | FLASH_PGERR)) {
- /* If this operation fails, we ignore it and report the original
- * retval
- */
- target_write_u32(target, EM357_FLASH_SR, FLASH_WRPRTERR | FLASH_PGERR);
- }
- return retval;
- }
-
- static int em357_read_options(struct flash_bank *bank)
- {
- uint32_t optiondata;
- struct em357_flash_bank *em357_info = NULL;
- struct target *target = bank->target;
-
- em357_info = bank->driver_priv;
-
- /* read current option bytes */
- int retval = target_read_u32(target, EM357_FLASH_OBR, &optiondata);
- if (retval != ERROR_OK)
- return retval;
-
- em357_info->option_bytes.user_options = (uint16_t)0xFFFC | ((optiondata >> 2) & 0x03);
- em357_info->option_bytes.RDP = (optiondata & (1 << OPT_READOUT)) ? 0xFFFF : 0x5AA5;
-
- if (optiondata & (1 << OPT_READOUT))
- LOG_INFO("Device Security Bit Set");
-
- /* each bit refers to a 4bank protection */
- retval = target_read_u32(target, EM357_FLASH_WRPR, &optiondata);
- if (retval != ERROR_OK)
- return retval;
-
- em357_info->option_bytes.protection[0] = (uint16_t)optiondata;
- em357_info->option_bytes.protection[1] = (uint16_t)(optiondata >> 8);
- em357_info->option_bytes.protection[2] = (uint16_t)(optiondata >> 16);
-
- return ERROR_OK;
- }
-
- static int em357_erase_options(struct flash_bank *bank)
- {
- struct em357_flash_bank *em357_info = NULL;
- struct target *target = bank->target;
-
- em357_info = bank->driver_priv;
-
- /* read current options */
- em357_read_options(bank);
-
- /* unlock flash registers */
- int retval = target_write_u32(target, EM357_FLASH_KEYR, KEY1);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_write_u32(target, EM357_FLASH_KEYR, KEY2);
- if (retval != ERROR_OK)
- return retval;
-
- /* unlock option flash registers */
- retval = target_write_u32(target, EM357_FLASH_OPTKEYR, KEY1);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, EM357_FLASH_OPTKEYR, KEY2);
- if (retval != ERROR_OK)
- return retval;
-
- /* erase option bytes */
- retval = target_write_u32(target, EM357_FLASH_CR, FLASH_OPTER | FLASH_OPTWRE);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, EM357_FLASH_CR, FLASH_OPTER | FLASH_STRT | FLASH_OPTWRE);
- if (retval != ERROR_OK)
- return retval;
-
- retval = em357_wait_status_busy(bank, 10);
- if (retval != ERROR_OK)
- return retval;
-
- /* clear readout protection and complementary option bytes
- * this will also force a device unlock if set */
- em357_info->option_bytes.RDP = 0x5AA5;
-
- return ERROR_OK;
- }
-
- static int em357_write_options(struct flash_bank *bank)
- {
- struct em357_flash_bank *em357_info = NULL;
- struct target *target = bank->target;
-
- em357_info = bank->driver_priv;
-
- /* unlock flash registers */
- int retval = target_write_u32(target, EM357_FLASH_KEYR, KEY1);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, EM357_FLASH_KEYR, KEY2);
- if (retval != ERROR_OK)
- return retval;
-
- /* unlock option flash registers */
- retval = target_write_u32(target, EM357_FLASH_OPTKEYR, KEY1);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, EM357_FLASH_OPTKEYR, KEY2);
- if (retval != ERROR_OK)
- return retval;
-
- /* program option bytes */
- retval = target_write_u32(target, EM357_FLASH_CR, FLASH_OPTPG | FLASH_OPTWRE);
- if (retval != ERROR_OK)
- return retval;
-
- retval = em357_wait_status_busy(bank, 10);
- if (retval != ERROR_OK)
- return retval;
-
- /* write protection byte 1 */
- retval = target_write_u16(target, EM357_OB_WRP0, em357_info->option_bytes.protection[0]);
- if (retval != ERROR_OK)
- return retval;
-
- retval = em357_wait_status_busy(bank, 10);
- if (retval != ERROR_OK)
- return retval;
-
- /* write protection byte 2 */
- retval = target_write_u16(target, EM357_OB_WRP1, em357_info->option_bytes.protection[1]);
- if (retval != ERROR_OK)
- return retval;
-
- retval = em357_wait_status_busy(bank, 10);
- if (retval != ERROR_OK)
- return retval;
-
- /* write protection byte 3 */
- retval = target_write_u16(target, EM357_OB_WRP2, em357_info->option_bytes.protection[2]);
- if (retval != ERROR_OK)
- return retval;
-
- retval = em357_wait_status_busy(bank, 10);
- if (retval != ERROR_OK)
- return retval;
-
- /* write readout protection bit */
- retval = target_write_u16(target, EM357_OB_RDP, em357_info->option_bytes.RDP);
- if (retval != ERROR_OK)
- return retval;
-
- retval = em357_wait_status_busy(bank, 10);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_write_u32(target, EM357_FLASH_CR, FLASH_LOCK);
- if (retval != ERROR_OK)
- return retval;
-
- return ERROR_OK;
- }
-
- static int em357_protect_check(struct flash_bank *bank)
- {
- struct target *target = bank->target;
- struct em357_flash_bank *em357_info = bank->driver_priv;
-
- uint32_t protection;
- int i, s;
- int num_bits;
- int set;
-
- if (target->state != TARGET_HALTED) {
- LOG_ERROR("Target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- /* each bit refers to a 4bank protection (bit 0-23) */
- int retval = target_read_u32(target, EM357_FLASH_WRPR, &protection);
- if (retval != ERROR_OK)
- return retval;
-
- /* each protection bit is for 4 * 2K pages */
- num_bits = (bank->num_sectors / em357_info->ppage_size);
-
- for (i = 0; i < num_bits; i++) {
- set = 1;
- if (protection & (1 << i))
- set = 0;
-
- for (s = 0; s < em357_info->ppage_size; s++)
- bank->sectors[(i * em357_info->ppage_size) + s].is_protected = set;
- }
-
- return ERROR_OK;
- }
-
- static int em357_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;
- }
-
- if ((first == 0) && (last == (bank->num_sectors - 1)))
- return em357_mass_erase(bank);
-
- /* Enable FPEC clock */
- target_write_u32(target, EM357_FPEC_CLK, 0x00000001);
-
- /* unlock flash registers */
- int retval = target_write_u32(target, EM357_FLASH_KEYR, KEY1);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, EM357_FLASH_KEYR, KEY2);
- if (retval != ERROR_OK)
- return retval;
-
- for (i = first; i <= last; i++) {
- retval = target_write_u32(target, EM357_FLASH_CR, FLASH_PER);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, EM357_FLASH_AR,
- bank->base + bank->sectors[i].offset);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, EM357_FLASH_CR, FLASH_PER | FLASH_STRT);
- if (retval != ERROR_OK)
- return retval;
-
- retval = em357_wait_status_busy(bank, 100);
- if (retval != ERROR_OK)
- return retval;
-
- bank->sectors[i].is_erased = 1;
- }
-
- retval = target_write_u32(target, EM357_FLASH_CR, FLASH_LOCK);
- if (retval != ERROR_OK)
- return retval;
-
- return ERROR_OK;
- }
-
- static int em357_protect(struct flash_bank *bank, int set, int first, int last)
- {
- struct em357_flash_bank *em357_info = NULL;
- struct target *target = bank->target;
- uint16_t prot_reg[4] = {0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF};
- int i, reg, bit;
- int status;
- uint32_t protection;
-
- em357_info = bank->driver_priv;
-
- if (target->state != TARGET_HALTED) {
- LOG_ERROR("Target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if ((first % em357_info->ppage_size) != 0) {
- LOG_WARNING("aligned start protect sector to a %d sector boundary",
- em357_info->ppage_size);
- first = first - (first % em357_info->ppage_size);
- }
- if (((last + 1) % em357_info->ppage_size) != 0) {
- LOG_WARNING("aligned end protect sector to a %d sector boundary",
- em357_info->ppage_size);
- last++;
- last = last - (last % em357_info->ppage_size);
- last--;
- }
-
- /* each bit refers to a 4bank protection */
- int retval = target_read_u32(target, EM357_FLASH_WRPR, &protection);
- if (retval != ERROR_OK)
- return retval;
-
- prot_reg[0] = (uint16_t)protection;
- prot_reg[1] = (uint16_t)(protection >> 8);
- prot_reg[2] = (uint16_t)(protection >> 16);
-
- for (i = first; i <= last; i++) {
- reg = (i / em357_info->ppage_size) / 8;
- bit = (i / em357_info->ppage_size) - (reg * 8);
-
- LOG_WARNING("reg, bit: %d, %d", reg, bit);
- if (set)
- prot_reg[reg] &= ~(1 << bit);
- else
- prot_reg[reg] |= (1 << bit);
- }
-
- status = em357_erase_options(bank);
- if (retval != ERROR_OK)
- return status;
-
- em357_info->option_bytes.protection[0] = prot_reg[0];
- em357_info->option_bytes.protection[1] = prot_reg[1];
- em357_info->option_bytes.protection[2] = prot_reg[2];
-
- return em357_write_options(bank);
- }
-
- static int em357_write_block(struct flash_bank *bank, 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[4];
- struct armv7m_algorithm armv7m_info;
- int retval = ERROR_OK;
-
- /* see contib/loaders/flash/stm32x.s for src, the same is used here except for
- * a modified *_FLASH_BASE */
-
- static const uint8_t em357_flash_write_code[] = {
- /* #define EM357_FLASH_CR_OFFSET 0x10
- * #define EM357_FLASH_SR_OFFSET 0x0C
- * write: */
- 0x08, 0x4c, /* ldr r4, EM357_FLASH_BASE */
- 0x1c, 0x44, /* add r4, r3 */
- /* write_half_word: */
- 0x01, 0x23, /* movs r3, #0x01 */
- 0x23, 0x61, /* str r3, [r4,
- *#EM357_FLASH_CR_OFFSET] */
- 0x30, 0xf8, 0x02, 0x3b, /* ldrh r3, [r0], #0x02 */
- 0x21, 0xf8, 0x02, 0x3b, /* strh r3, [r1], #0x02 */
- /* busy: */
- 0xe3, 0x68, /* ldr r3, [r4,
- *#EM357_FLASH_SR_OFFSET] */
- 0x13, 0xf0, 0x01, 0x0f, /* tst r3, #0x01 */
- 0xfb, 0xd0, /* beq busy */
- 0x13, 0xf0, 0x14, 0x0f, /* tst r3, #0x14 */
- 0x01, 0xd1, /* bne exit */
- 0x01, 0x3a, /* subs r2, r2, #0x01 */
- 0xf0, 0xd1, /* bne write_half_word */
- /* exit: */
- 0x00, 0xbe, /* bkpt #0x00 */
- 0x00, 0x80, 0x00, 0x40, /* EM357_FLASH_BASE: .word 0x40008000 */
- };
-
- /* flash write code */
- if (target_alloc_working_area(target, sizeof(em357_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(em357_flash_write_code), (uint8_t *)em357_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_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);
-
- while (count > 0) {
- uint32_t thisrun_count = (count > (buffer_size / 2)) ?
- (buffer_size / 2) : count;
-
- retval = target_write_buffer(target, source->address, thisrun_count * 2, buffer);
- if (retval != 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);
- buf_set_u32(reg_params[3].value, 0, 32, 0);
-
- retval = target_run_algorithm(target, 0, NULL, 4, reg_params,
- write_algorithm->address, 0, 10000, &armv7m_info);
- if (retval != ERROR_OK) {
- LOG_ERROR("error executing em357 flash write algorithm");
- break;
- }
-
- if (buf_get_u32(reg_params[3].value, 0, 32) & FLASH_PGERR) {
- LOG_ERROR("flash memory not erased before writing");
- /* Clear but report errors */
- target_write_u32(target, EM357_FLASH_SR, FLASH_PGERR);
- retval = ERROR_FAIL;
- break;
- }
-
- if (buf_get_u32(reg_params[3].value, 0, 32) & FLASH_WRPRTERR) {
- LOG_ERROR("flash memory write protected");
- /* Clear but report errors */
- target_write_u32(target, EM357_FLASH_SR, FLASH_WRPRTERR);
- 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, write_algorithm);
-
- destroy_reg_param(®_params[0]);
- destroy_reg_param(®_params[1]);
- destroy_reg_param(®_params[2]);
- destroy_reg_param(®_params[3]);
-
- return retval;
- }
-
- static int em357_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;
- }
-
- /* unlock flash registers */
- retval = target_write_u32(target, EM357_FLASH_KEYR, KEY1);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, EM357_FLASH_KEYR, KEY2);
- if (retval != ERROR_OK)
- return retval;
-
- target_write_u32(target, EM357_FPEC_CLK, 0x00000001);
-
- /* multiple half words (2-byte) to be programmed? */
- if (words_remaining > 0) {
- /* try using a block write */
- retval = em357_write_block(bank, buffer, offset, words_remaining);
- if (retval != 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;
-
- while (words_remaining > 0) {
- uint16_t value;
- memcpy(&value, buffer + bytes_written, sizeof(uint16_t));
-
- retval = target_write_u32(target, EM357_FLASH_CR, FLASH_PG);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u16(target, address, value);
- if (retval != ERROR_OK)
- return retval;
-
- retval = em357_wait_status_busy(bank, 5);
- if (retval != ERROR_OK)
- return retval;
-
- bytes_written += 2;
- words_remaining--;
- address += 2;
- }
-
- if (bytes_remaining) {
- uint16_t value = 0xffff;
- memcpy(&value, buffer + bytes_written, bytes_remaining);
-
- retval = target_write_u32(target, EM357_FLASH_CR, FLASH_PG);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u16(target, address, value);
- if (retval != ERROR_OK)
- return retval;
-
- retval = em357_wait_status_busy(bank, 5);
- if (retval != ERROR_OK)
- return retval;
- }
-
- return target_write_u32(target, EM357_FLASH_CR, FLASH_LOCK);
- }
-
- static int em357_probe(struct flash_bank *bank)
- {
- struct target *target = bank->target;
- struct em357_flash_bank *em357_info = bank->driver_priv;
- int i;
- uint16_t num_pages;
- int page_size;
- uint32_t base_address = 0x08000000;
-
- em357_info->probed = 0;
-
- switch (bank->size) {
- case 0x10000:
- /* 64k -- 64 1k pages */
- num_pages = 64;
- page_size = 1024;
- break;
- case 0x20000:
- /* 128k -- 128 1k pages */
- num_pages = 128;
- page_size = 1024;
- break;
- case 0x30000:
- /* 192k -- 96 2k pages */
- num_pages = 96;
- page_size = 2048;
- break;
- case 0x40000:
- /* 256k -- 128 2k pages */
- num_pages = 128;
- page_size = 2048;
- break;
- default:
- LOG_WARNING("No size specified for em357 flash driver, assuming 192k!");
- num_pages = 96;
- page_size = 2048;
- break;
- }
-
- /* Enable FPEC CLK */
- int retval = target_write_u32(target, EM357_FPEC_CLK, 0x00000001);
- if (retval != ERROR_OK)
- return retval;
-
- em357_info->ppage_size = 4;
-
- LOG_INFO("flash size = %dkbytes", num_pages*page_size/1024);
-
- if (bank->sectors) {
- free(bank->sectors);
- bank->sectors = NULL;
- }
-
- bank->base = base_address;
- bank->size = (num_pages * page_size);
- bank->num_sectors = num_pages;
- bank->sectors = malloc(sizeof(struct flash_sector) * num_pages);
-
- for (i = 0; i < num_pages; i++) {
- bank->sectors[i].offset = i * page_size;
- bank->sectors[i].size = page_size;
- bank->sectors[i].is_erased = -1;
- bank->sectors[i].is_protected = 1;
- }
-
- em357_info->probed = 1;
-
- return ERROR_OK;
- }
-
- static int em357_auto_probe(struct flash_bank *bank)
- {
- struct em357_flash_bank *em357_info = bank->driver_priv;
- if (em357_info->probed)
- return ERROR_OK;
- return em357_probe(bank);
- }
-
-
- static int get_em357_info(struct flash_bank *bank, char *buf, int buf_size)
- {
- snprintf(buf, buf_size, "em357\n");
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(em357_handle_lock_command)
- {
- struct target *target = NULL;
- struct em357_flash_bank *em357_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;
-
- em357_info = bank->driver_priv;
-
- target = bank->target;
-
- if (target->state != TARGET_HALTED) {
- LOG_ERROR("Target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (em357_erase_options(bank) != ERROR_OK) {
- command_print(CMD_CTX, "em357 failed to erase options");
- return ERROR_OK;
- }
-
- /* set readout protection */
- em357_info->option_bytes.RDP = 0;
-
- if (em357_write_options(bank) != ERROR_OK) {
- command_print(CMD_CTX, "em357 failed to lock device");
- return ERROR_OK;
- }
-
- command_print(CMD_CTX, "em357 locked");
-
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(em357_handle_unlock_command)
- {
- struct target *target = 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;
-
- target = bank->target;
-
- if (target->state != TARGET_HALTED) {
- LOG_ERROR("Target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (em357_erase_options(bank) != ERROR_OK) {
- command_print(CMD_CTX, "em357 failed to unlock device");
- return ERROR_OK;
- }
-
- if (em357_write_options(bank) != ERROR_OK) {
- command_print(CMD_CTX, "em357 failed to lock device");
- return ERROR_OK;
- }
-
- command_print(CMD_CTX, "em357 unlocked.\n"
- "INFO: a reset or power cycle is required "
- "for the new settings to take effect.");
-
- return ERROR_OK;
- }
-
- static int em357_mass_erase(struct flash_bank *bank)
- {
- struct target *target = bank->target;
-
- if (target->state != TARGET_HALTED) {
- LOG_ERROR("Target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- /* Make sure the flash clock is on */
- target_write_u32(target, EM357_FPEC_CLK, 0x00000001);
-
- /* unlock option flash registers */
- int retval = target_write_u32(target, EM357_FLASH_KEYR, KEY1);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, EM357_FLASH_KEYR, KEY2);
- if (retval != ERROR_OK)
- return retval;
-
- /* mass erase flash memory */
- retval = target_write_u32(target, EM357_FLASH_CR, FLASH_MER);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, EM357_FLASH_CR, FLASH_MER | FLASH_STRT);
- if (retval != ERROR_OK)
- return retval;
-
- retval = em357_wait_status_busy(bank, 100);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_write_u32(target, EM357_FLASH_CR, FLASH_LOCK);
- if (retval != ERROR_OK)
- return retval;
-
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(em357_handle_mass_erase_command)
- {
- int i;
-
- 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;
-
- retval = em357_mass_erase(bank);
- 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, "em357 mass erase complete");
- } else
- command_print(CMD_CTX, "em357 mass erase failed");
-
- return retval;
- }
-
- static const struct command_registration em357_exec_command_handlers[] = {
- {
- .name = "lock",
- .usage = "<bank>",
- .handler = em357_handle_lock_command,
- .mode = COMMAND_EXEC,
- .help = "Lock entire flash device.",
- },
- {
- .name = "unlock",
- .usage = "<bank>",
- .handler = em357_handle_unlock_command,
- .mode = COMMAND_EXEC,
- .help = "Unlock entire protected flash device.",
- },
- {
- .name = "mass_erase",
- .usage = "<bank>",
- .handler = em357_handle_mass_erase_command,
- .mode = COMMAND_EXEC,
- .help = "Erase entire flash device.",
- },
- COMMAND_REGISTRATION_DONE
- };
-
- static const struct command_registration em357_command_handlers[] = {
- {
- .name = "em357",
- .mode = COMMAND_ANY,
- .help = "em357 flash command group",
- .usage = "",
- .chain = em357_exec_command_handlers,
- },
- COMMAND_REGISTRATION_DONE
- };
-
- struct flash_driver em357_flash = {
- .name = "em357",
- .commands = em357_command_handlers,
- .flash_bank_command = em357_flash_bank_command,
- .erase = em357_erase,
- .protect = em357_protect,
- .write = em357_write,
- .read = default_flash_read,
- .probe = em357_probe,
- .auto_probe = em357_auto_probe,
- .erase_check = default_flash_blank_check,
- .protect_check = em357_protect_check,
- .info = get_em357_info,
- };
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