--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2019 Icenowy Zheng <icenowy@aosc.io> *
+ * Copyright (C) 2019 Caleb Szalacinski <contact@skiboy.net> *
+ * *
+ * 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, see <http://www.gnu.org/licenses/>. *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "imp.h"
+#include <target/image.h>
+
+#define SWM050_DELAY 100
+
+#define SWM050_FLASH_PAGE_SIZE 0x200
+#define SWM050_FLASH_PAGES 16
+
+#define SWM050_CPU_ID 0xE000ED00
+#define SWM050_CPU_ID_VAL 0x410CC200
+
+#define SWM050_FLASH_REG1 0x1F000000
+#define SWM050_FLASH_REG2 0x1F000038
+#define SWM050_FLASH_KEY 0xAAAAAAAA
+
+#define SWM050_SYSCTL_CFG_0 0x400F0000
+#define SWM050_SYSCTL_DBLF 0x400F0008
+
+static int swm050_erase(struct flash_bank *bank, int first, int last)
+{
+ struct target *target = bank->target;
+ int retval, curr_page;
+ uint32_t curr_addr;
+
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ /* Perform erase */
+ retval = target_write_u32(target, SWM050_FLASH_REG1, 0x4);
+ if (retval != ERROR_OK)
+ return retval;
+
+ for (curr_page = first; curr_page <= last; curr_page++) {
+ curr_addr = bank->base + (SWM050_FLASH_PAGE_SIZE * curr_page);
+ /* Perform write */
+ retval = target_write_u32(target, curr_addr, SWM050_FLASH_KEY);
+ if (retval != ERROR_OK)
+ return retval;
+ alive_sleep(SWM050_DELAY);
+ }
+
+ /* Close flash interface */
+ retval = target_write_u32(target, SWM050_FLASH_REG1, 0x0);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return ERROR_OK;
+}
+
+static int swm050_write(struct flash_bank *bank, const uint8_t *buffer, uint32_t offset, uint32_t count)
+{
+ struct target *target = bank->target;
+ int retval;
+
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ retval = ERROR_TARGET_NOT_HALTED;
+ return retval;
+ }
+
+ /* Perform write */
+ retval = target_write_u32(target, SWM050_FLASH_REG1, 0x1);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = target_write_memory(target, bank->base + offset, 4, count/4, buffer);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* Close flash interface */
+ retval = target_write_u32(target, SWM050_FLASH_REG1, 0x0);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return ERROR_OK;
+}
+
+static int swm050_probe(struct flash_bank *bank)
+{
+ return ERROR_OK;
+}
+
+static int swm050_mass_erase(struct flash_bank *bank)
+{
+ struct target *target = bank->target;
+ int retval;
+
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ /* Perform mass erase */
+ retval = target_write_u32(target, SWM050_FLASH_REG1, 0x6);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = target_write_u32(target, SWM050_FLASH_REG2, 0x1);
+ if (retval != ERROR_OK)
+ return retval;
+ retval = target_write_u32(target, 0x0, SWM050_FLASH_KEY);
+ if (retval != ERROR_OK)
+ return retval;
+
+ alive_sleep(SWM050_DELAY);
+
+ /* Close flash interface */
+ retval = target_write_u32(target, SWM050_FLASH_REG1, 0x0);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(swm050_handle_mass_erase_command)
+{
+ 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 = swm050_mass_erase(bank);
+ if (retval == ERROR_OK)
+ command_print(CMD, "swm050 mass erase complete");
+ else
+ command_print(CMD, "swm050 mass erase failed");
+
+ return retval;
+}
+
+FLASH_BANK_COMMAND_HANDLER(swm050_flash_bank_command)
+{
+ if (bank->sectors) {
+ free(bank->sectors);
+ bank->sectors = NULL;
+ }
+ bank->write_start_alignment = 4;
+ bank->write_end_alignment = 4;
+ bank->size = SWM050_FLASH_PAGE_SIZE * SWM050_FLASH_PAGES;
+
+ bank->num_sectors = SWM050_FLASH_PAGES;
+ bank->sectors = alloc_block_array(0, SWM050_FLASH_PAGE_SIZE, SWM050_FLASH_PAGES);
+ if (!bank->sectors)
+ return ERROR_FAIL;
+
+ for (int i = 0; i < bank->num_sectors; i++)
+ bank->sectors[i].is_protected = 0;
+
+ return ERROR_OK;
+}
+
+static const struct command_registration swm050_exec_command_handlers[] = {
+ {
+ .name = "mass_erase",
+ .handler = swm050_handle_mass_erase_command,
+ .mode = COMMAND_EXEC,
+ .usage = "bank_id",
+ .help = "Erase entire flash device.",
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+static const struct command_registration swm050_command_handlers[] = {
+ {
+ .name = "swm050",
+ .mode = COMMAND_ANY,
+ .help = "swm050 flash command group",
+ .usage = "",
+ .chain = swm050_exec_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+struct flash_driver swm050_flash = {
+ .name = "swm050",
+ .commands = swm050_command_handlers,
+ .flash_bank_command = swm050_flash_bank_command,
+ .erase = swm050_erase,
+ .write = swm050_write,
+ .read = default_flash_read,
+ .probe = swm050_probe,
+ .auto_probe = swm050_probe,
+ .erase_check = default_flash_blank_check,
+ .free_driver_priv = default_flash_free_driver_priv,
+};
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