--- /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 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., *
+ * 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>
+
+/* 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;
+ struct working_area *write_algorithm;
+ 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)
+ {
+ LOG_WARNING("incomplete flash_bank em357 configuration");
+ return ERROR_FLASH_BANK_INVALID;
+ }
+
+ em357_info = malloc(sizeof(struct em357_flash_bank));
+ bank->driver_priv = em357_info;
+
+ em357_info->write_algorithm = NULL;
+ 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);
+ }
+
+ /* 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);
+ }
+
+ if ((status = em357_erase_options(bank)) != 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 em357_flash_bank *em357_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[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),
+ &em357_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, em357_info->write_algorithm->address,
+ sizeof(em357_flash_write_code),
+ (uint8_t*)em357_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 (em357_info->write_algorithm)
+ target_free_working_area(target, em357_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);
+
+ 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);
+ buf_set_u32(reg_params[3].value, 0, 32, 0);
+
+ if ((retval = target_run_algorithm(target, 0, NULL, 4, reg_params,
+ em357_info->write_algorithm->address,
+ 0,
+ 10000, &armv7m_info)) != 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, em357_info->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;
+
+ /* multiple half words (2-byte) to be programmed? */
+ if (words_remaining > 0)
+ {
+ /* try using a block write */
+ if ((retval = em357_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;
+
+ 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;
+
+ /* Enable FPEC CLK */
+ int retval = target_write_u32(target, EM357_FPEC_CLK, 0x00000001);
+ if (retval != ERROR_OK)
+ return retval;
+
+ page_size = 2048;
+ em357_info->ppage_size = 4;
+ num_pages = 96;
+
+ 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)
+{
+ int printed;
+ printed = snprintf(buf, buf_size, "em357\n");
+ buf += printed;
+ buf_size -= printed;
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(em357_handle_lock_command)
+{
+ struct target *target = NULL;
+ struct em357_flash_bank *em357_info = NULL;
+
+ if (CMD_ARGC < 1)
+ {
+ command_print(CMD_CTX, "em357 lock <bank>");
+ return ERROR_OK;
+ }
+
+ 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;
+ struct em357_flash_bank *em357_info = NULL;
+
+ if (CMD_ARGC < 1)
+ {
+ command_print(CMD_CTX, "em357 unlock <bank>");
+ return ERROR_OK;
+ }
+
+ 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 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;
+ }
+
+ /* 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)
+ {
+ command_print(CMD_CTX, "em357 mass_erase <bank>");
+ return ERROR_OK;
+ }
+
+ 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",
+ .handler = em357_handle_lock_command,
+ .mode = COMMAND_EXEC,
+ .usage = "bank_id",
+ .help = "Lock entire flash device.",
+ },
+ {
+ .name = "unlock",
+ .handler = em357_handle_unlock_command,
+ .mode = COMMAND_EXEC,
+ .usage = "bank_id",
+ .help = "Unlock entire protected flash device.",
+ },
+ {
+ .name = "mass_erase",
+ .handler = em357_handle_mass_erase_command,
+ .mode = COMMAND_EXEC,
+ .usage = "bank_id",
+ .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",
+ .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_mem_blank_check,
+ .protect_check = em357_protect_check,
+ .info = get_em357_info,
+};
projects / openocd / blobdiff