Remove gd32vf103 flash driver.

Per mainline, use stm32f1x instead. Tested that this is working.

Change-Id: Icda4b2a39e06e2adf9bbfb984bd578347f43d7d1
Signed-off-by: Tim Newsome <tim@sifive.com>

3 files changed, 0 insertions, 1347 deletions

diff --git a/src/flash/nor/Makefile.am b/src/flash/nor/Makefile.am
index a091744..a5ef422 100644
--- a/src/flash/nor/Makefile.am
+++ b/src/flash/nor/Makefile.am
@@ -66,7 +66,6 @@ NOR_DRIVERS = \
 	%D%/stm32lx.c \
 	%D%/stm32l4x.c \
 	%D%/stm32h7x.c \
-	%D%/gd32vf103.c \
 	%D%/str7x.c \
 	%D%/str9x.c \
 	%D%/str9xpec.c \
diff --git a/src/flash/nor/drivers.c b/src/flash/nor/drivers.c
index dc966ed..3e35c09 100644
--- a/src/flash/nor/drivers.c
+++ b/src/flash/nor/drivers.c
@@ -44,7 +44,6 @@ extern const struct flash_driver faux_flash;
 extern const struct flash_driver fm3_flash;
 extern const struct flash_driver fm4_flash;
 extern const struct flash_driver fespi_flash;
-extern const struct flash_driver gd32vf103_flash;
 extern const struct flash_driver jtagspi_flash;
 extern const struct flash_driver kinetis_flash;
 extern const struct flash_driver kinetis_ke_flash;
@@ -153,7 +152,6 @@ static const struct flash_driver * const flash_drivers[] = {
 	&stm32lx_flash,
 	&stm32l4x_flash,
 	&stm32h7x_flash,
-	&gd32vf103_flash,
 	&stmsmi_flash,
 	&stmqspi_flash,
 	&str7x_flash,
diff --git a/src/flash/nor/gd32vf103.c b/src/flash/nor/gd32vf103.c
deleted file mode 100644
index 562f41e..0000000
--- a/src/flash/nor/gd32vf103.c
+++ /dev/null
@@ -1,1344 +0,0 @@
-/***************************************************************************
- *
- *   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 <helper/binarybuffer.h>
-#include <target/algorithm.h>
-
-/* gd32vf103 register locations */
-
-#define FLASH_REG_BASE_B0 0x40022000
-#define FLASH_REG_BASE_B1 0x40022040
-
-#define FMC_WS    0x00
-#define FMC_KEY    0x04
-#define FMC_OBKEY 0x08
-#define FMC_STAT      0x0C
-#define FMC_CTL      0x10
-#define FMC_ADDR      0x14
-#define FMC_OBSTAT     0x1C
-
-/* TODO: Check if code using these really should be hard coded to bank 0.
- * There are valid cases, on dual flash devices the protection of the
- * second bank is done on the bank0 reg's. */
-#define FMC_WS_B0     0x40022000
-#define FMC_KEY_B0    0x40022004
-#define FMC_OBKEY_B0 0x40022008
-#define FMC_STAT_B0      0x4002200C
-#define FMC_CTL_B0      0x40022010
-#define FMC_ADDR_B0      0x40022014
-#define FMC_OBSTAT_B0     0x4002201C
-#define FMC_WP_B0    0x40022020
-
-/* option byte location */
-
-#define FMC_OB_RDP		0x1FFFF800
-
-/* FMC_CTL register bits */
-
-#define FMC_CTL_PG		(1 << 0)
-#define FMC_CTL_PER		(1 << 1)
-#define FMC_CTL_MER		(1 << 2)
-#define FMC_CTL_OBPG	(1 << 4)
-#define FMC_CTL_OBER	(1 << 5)
-#define FMC_CTL_START	(1 << 6)
-#define FMC_CTL_LK		(1 << 7)
-#define FMC_CTL_OBWEN	(1 << 9)
-
-/* FMC_STAT register bits */
-
-#define FMC_STAT_BUSY		(1 << 0)
-#define FMC_STAT_PGERR		(1 << 2)
-#define FMC_STAT_WPERR	(1 << 4)
-#define FMC_STAT_ENDF		(1 << 5)
-
-/* FMC_OBSTAT bit definitions (reading) */
-
-#define FMC_OBSTAT_OBERR		0
-#define FMC_OBSTAT_SPC		1
-#define FMC_OBSTAT_WDG_SW		2
-#define FMC_OBSTAT_RST_DSLEEP		3
-#define FMC_OBSTAT_RST_STDBY	4
-#define FMC_OBSTAT_BB		5	/* dual flash bank only */
-
-/* register unlock keys */
-
-#define UNLOCK_KEY0			0x45670123
-#define UNLOCK_KEY1			0xCDEF89AB
-
-/* timeout values */
-
-#define FLASH_WRITE_TIMEOUT 500
-#define FLASH_ERASE_TIMEOUT 5000
-
-struct gd32vf103_options {
-	uint16_t RDP;
-	uint16_t user_options;
-	uint16_t user_data;
-	uint16_t protection[4];
-};
-
-struct gd32vf103_flash_bank {
-	struct gd32vf103_options option_bytes;
-	int ppage_size;
-	int probed;
-
-	bool has_dual_banks;
-	/* used to access dual flash bank gd32vf103 */
-	uint32_t register_base;
-	uint16_t default_rdp;
-	int user_data_offset;
-	int option_offset;
-	uint32_t user_bank_size;
-};
-
-static int gd32vf103_mass_erase(struct flash_bank *bank);
-static int get_gd32vf103_info(struct flash_bank *bank, struct command_invocation *cmd);
-static int gd32vf103_write_block(struct flash_bank *bank, const uint8_t *buffer,
-		uint32_t offset, uint32_t count);
-
-/* flash bank gd32vf103 <base> <size> 0 0 <target#>
- */
-FLASH_BANK_COMMAND_HANDLER(gd32vf103_flash_bank_command)
-{
-	struct gd32vf103_flash_bank *gd32vf103_info;
-
-	if (CMD_ARGC < 6)
-		return ERROR_COMMAND_SYNTAX_ERROR;
-
-	gd32vf103_info = malloc(sizeof(struct gd32vf103_flash_bank));
-
-	bank->driver_priv = gd32vf103_info;
-	gd32vf103_info->probed = 0;
-	gd32vf103_info->has_dual_banks = false;
-	gd32vf103_info->register_base = FLASH_REG_BASE_B0;
-	gd32vf103_info->user_bank_size = bank->size;
-
-	return ERROR_OK;
-}
-
-static inline int gd32vf103_get_flash_reg(struct flash_bank *bank, uint32_t reg)
-{
-	struct gd32vf103_flash_bank *gd32vf103_info = bank->driver_priv;
-	return reg + gd32vf103_info->register_base;
-}
-
-static inline int gd32vf103_get_flash_status(struct flash_bank *bank, uint32_t *status)
-{
-	struct target *target = bank->target;
-	return target_read_u32(target, gd32vf103_get_flash_reg(bank, FMC_STAT), status);
-}
-
-static int gd32vf103_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 = gd32vf103_get_flash_status(bank, &status);
-		if (retval != ERROR_OK)
-			return retval;
-		LOG_DEBUG("status: 0x%" PRIx32 "", status);
-		if ((status & FMC_STAT_BUSY) == 0)
-			break;
-		if (timeout-- <= 0) {
-			LOG_ERROR("timed out waiting for flash");
-			return ERROR_FAIL;
-		}
-		alive_sleep(1);
-	}
-
-	if (status & FMC_STAT_WPERR) {
-		LOG_ERROR("gd32vf103 device protected");
-		retval = ERROR_FAIL;
-	}
-
-	if (status & FMC_STAT_PGERR) {
-		LOG_ERROR("gd32vf103 device programming failed");
-		retval = ERROR_FAIL;
-	}
-
-	/* Clear but report errors */
-	if (status & (FMC_STAT_WPERR | FMC_STAT_PGERR)) {
-		/* If this operation fails, we ignore it and report the original
-		 * retval
-		 */
-		target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_STAT),
-				FMC_STAT_WPERR | FMC_STAT_PGERR);
-	}
-	return retval;
-}
-
-static int gd32vf103_check_operation_supported(struct flash_bank *bank)
-{
-	struct gd32vf103_flash_bank *gd32vf103_info = bank->driver_priv;
-
-	/* if we have a dual flash bank device then
-	 * we need to perform option byte stuff on bank0 only */
-	if (gd32vf103_info->register_base != FLASH_REG_BASE_B0) {
-		LOG_ERROR("Option Byte Operation's must use bank0");
-		return ERROR_FLASH_OPERATION_FAILED;
-	}
-
-	return ERROR_OK;
-}
-
-static int gd32vf103_read_options(struct flash_bank *bank)
-{
-	uint32_t optiondata;
-	struct gd32vf103_flash_bank *gd32vf103_info = NULL;
-	struct target *target = bank->target;
-
-	gd32vf103_info = bank->driver_priv;
-
-	/* read current option bytes */
-	int retval = target_read_u32(target, FMC_OBSTAT_B0, &optiondata);
-	if (retval != ERROR_OK)
-		return retval;
-
-	gd32vf103_info->option_bytes.user_options = (optiondata >> gd32vf103_info->option_offset >> 2) & 0xffff;
-	gd32vf103_info->option_bytes.user_data = (optiondata >> gd32vf103_info->user_data_offset) & 0xffff;
-	gd32vf103_info->option_bytes.RDP = (optiondata & (1 << FMC_OBSTAT_SPC)) ? 0xFFFF : 0x5AA5;
-
-	if (optiondata & (1 << FMC_OBSTAT_SPC))
-		LOG_INFO("Device Security Bit Set");
-
-	/* each bit refers to a 4bank protection */
-	retval = target_read_u32(target, FMC_WP_B0, &optiondata);
-	if (retval != ERROR_OK)
-		return retval;
-
-	gd32vf103_info->option_bytes.protection[0] = (uint16_t)optiondata;
-	gd32vf103_info->option_bytes.protection[1] = (uint16_t)(optiondata >> 8);
-	gd32vf103_info->option_bytes.protection[2] = (uint16_t)(optiondata >> 16);
-	gd32vf103_info->option_bytes.protection[3] = (uint16_t)(optiondata >> 24);
-
-	return ERROR_OK;
-}
-
-static int gd32vf103_erase_options(struct flash_bank *bank)
-{
-	struct gd32vf103_flash_bank *gd32vf103_info = NULL;
-	struct target *target = bank->target;
-
-	gd32vf103_info = bank->driver_priv;
-
-	/* read current options */
-	gd32vf103_read_options(bank);
-
-	/* unlock flash registers */
-	int retval = target_write_u32(target, FMC_KEY_B0, UNLOCK_KEY0);
-	if (retval != ERROR_OK)
-		return retval;
-
-	retval = target_write_u32(target, FMC_KEY_B0, UNLOCK_KEY1);
-	if (retval != ERROR_OK)
-		return retval;
-
-	/* unlock option flash registers */
-	retval = target_write_u32(target, FMC_OBKEY_B0, UNLOCK_KEY0);
-	if (retval != ERROR_OK)
-		return retval;
-	retval = target_write_u32(target, FMC_OBKEY_B0, UNLOCK_KEY1);
-	if (retval != ERROR_OK)
-		return retval;
-
-	/* erase option bytes */
-	retval = target_write_u32(target, FMC_CTL_B0, FMC_CTL_OBER | FMC_CTL_OBWEN);
-	if (retval != ERROR_OK)
-		return retval;
-	retval = target_write_u32(target, FMC_CTL_B0, FMC_CTL_OBER | FMC_CTL_START | FMC_CTL_OBWEN);
-	if (retval != ERROR_OK)
-		return retval;
-
-	retval = gd32vf103_wait_status_busy(bank, FLASH_ERASE_TIMEOUT);
-	if (retval != ERROR_OK)
-		return retval;
-
-	/* clear readout protection and complementary option bytes
-	 * this will also force a device unlock if set */
-	gd32vf103_info->option_bytes.RDP = gd32vf103_info->default_rdp;
-
-	return ERROR_OK;
-}
-
-static int gd32vf103_write_options(struct flash_bank *bank)
-{
-	struct gd32vf103_flash_bank *gd32vf103_info = NULL;
-	struct target *target = bank->target;
-
-	gd32vf103_info = bank->driver_priv;
-
-	/* unlock flash registers */
-	int retval = target_write_u32(target, FMC_KEY_B0, UNLOCK_KEY0);
-	if (retval != ERROR_OK)
-		return retval;
-	retval = target_write_u32(target, FMC_KEY_B0, UNLOCK_KEY1);
-	if (retval != ERROR_OK)
-		return retval;
-
-	/* unlock option flash registers */
-	retval = target_write_u32(target, FMC_OBKEY_B0, UNLOCK_KEY0);
-	if (retval != ERROR_OK)
-		return retval;
-	retval = target_write_u32(target, FMC_OBKEY_B0, UNLOCK_KEY1);
-	if (retval != ERROR_OK)
-		return retval;
-
-	/* program option bytes */
-	retval = target_write_u32(target, FMC_CTL_B0, FMC_CTL_OBPG | FMC_CTL_OBWEN);
-	if (retval != ERROR_OK)
-		return retval;
-
-	uint8_t opt_bytes[16];
-
-	target_buffer_set_u16(target, opt_bytes, gd32vf103_info->option_bytes.RDP);	/* SPC */
-	target_buffer_set_u16(target, opt_bytes + 2, gd32vf103_info->option_bytes.user_options); /* USER */
-	target_buffer_set_u16(target, opt_bytes + 4, gd32vf103_info->option_bytes.user_data & 0xff); /* DATA[7:0] */
-	target_buffer_set_u16(target, opt_bytes + 6, (gd32vf103_info->option_bytes.user_data >> 8) & 0xff); /* DATA[15:8] */
-	target_buffer_set_u16(target, opt_bytes + 8, gd32vf103_info->option_bytes.protection[0]); /* WP[7:0] */
-	target_buffer_set_u16(target, opt_bytes + 10, gd32vf103_info->option_bytes.protection[1]); /* WP[15:8] */
-	target_buffer_set_u16(target, opt_bytes + 12, gd32vf103_info->option_bytes.protection[2]); /* WP[23:16] */
-	target_buffer_set_u16(target, opt_bytes + 14, gd32vf103_info->option_bytes.protection[3]); /* WP[31:24] */
-
-	uint32_t offset = FMC_OB_RDP - bank->base;
-	retval = gd32vf103_write_block(bank, opt_bytes, offset, sizeof(opt_bytes) / 2);
-	if (retval != ERROR_OK) {
-		if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
-			LOG_ERROR("working area required to erase options bytes");
-		return retval;
-	}
-
-	retval = target_write_u32(target, FMC_CTL_B0, FMC_CTL_LK);
-	if (retval != ERROR_OK)
-		return retval;
-
-	return ERROR_OK;
-}
-
-static int gd32vf103_protect_check(struct flash_bank *bank)
-{
-	struct target *target = bank->target;
-	struct gd32vf103_flash_bank *gd32vf103_info = bank->driver_priv;
-
-	uint32_t protection;
-	int i;
-	int num_bits;
-	int set;
-
-	int retval = gd32vf103_check_operation_supported(bank);
-	if (ERROR_OK != retval)
-		return retval;
-
-	/* medium density - each bit refers to a 4bank protection
-	 * high density - each bit refers to a 2bank protection */
-	retval = target_read_u32(target, FMC_WP_B0, &protection);
-	if (retval != ERROR_OK)
-		return retval;
-
-	/* medium density - each protection bit is for 4 * 1K pages
-	 * high density - each protection bit is for 2 * 2K pages */
-	num_bits = (bank->num_sectors / gd32vf103_info->ppage_size);
-
-	if (gd32vf103_info->ppage_size == 2) {
-		/* high density flash/connectivity line protection */
-
-		set = 1;
-
-		if (protection & (1 << 31))
-			set = 0;
-
-		/* bit 31 controls sector 62 - 255 protection for high density
-		 * bit 31 controls sector 62 - 127 protection for connectivity line */
-		for (unsigned s = 62; s < bank->num_sectors; s++)
-			bank->sectors[s].is_protected = set;
-
-		if (bank->num_sectors > 61)
-			num_bits = 31;
-
-		for (i = 0; i < num_bits; i++) {
-			set = 1;
-
-			if (protection & (1 << i))
-				set = 0;
-
-			for (int s = 0; s < gd32vf103_info->ppage_size; s++)
-				bank->sectors[(i * gd32vf103_info->ppage_size) + s].is_protected = set;
-		}
-	} else {
-		/* low/medium density flash protection */
-		for (i = 0; i < num_bits; i++) {
-			set = 1;
-
-			if (protection & (1 << i))
-				set = 0;
-
-			for (int s = 0; s < gd32vf103_info->ppage_size; s++)
-				bank->sectors[(i * gd32vf103_info->ppage_size) + s].is_protected = set;
-		}
-	}
-
-	return ERROR_OK;
-}
-
-static int gd32vf103_erase(struct flash_bank *bank, unsigned first, unsigned last)
-{
-	struct target *target = bank->target;
-	uint32_t optiondata;
-	uint32_t obstat;
-
-	struct gd32vf103_flash_bank *gd32vf103_info = NULL;
-	gd32vf103_info = bank->driver_priv;
-
-	if (bank->target->state != TARGET_HALTED) {
-		LOG_ERROR("Target not halted");
-		return ERROR_TARGET_NOT_HALTED;
-	}
-	target_read_u32(target, FMC_WP_B0, &optiondata);
-	target_read_u32(target, FMC_OBSTAT_B0, &obstat);
-	if ((0xFFFFFFFF != optiondata) || ((obstat & 0x2) != 0)) {
-		gd32vf103_erase_options(bank);
-		optiondata = 0xFFFFFFFF;
-		gd32vf103_info->option_bytes.RDP = 0x5AA5;
-		gd32vf103_info->option_bytes.protection[0] = (uint16_t)optiondata;
-		gd32vf103_info->option_bytes.protection[1] = (uint16_t)(optiondata >> 8);
-		gd32vf103_info->option_bytes.protection[2] = (uint16_t)(optiondata >> 16);
-		gd32vf103_info->option_bytes.protection[3] = (uint16_t)(optiondata >> 24);
-
-		gd32vf103_write_options(bank);
-		LOG_INFO(" Unlock flash Sucess !!! Pls Reset Platfrom !!\n");
-		return ERROR_FAIL;
-	}
-	if ((first == 0) && (last == (bank->num_sectors - 1)))
-		return gd32vf103_mass_erase(bank);
-
-	/* unlock flash registers */
-	int retval = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_KEY), UNLOCK_KEY0);
-	if (retval != ERROR_OK)
-		return retval;
-	retval = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_KEY), UNLOCK_KEY1);
-	if (retval != ERROR_OK)
-		return retval;
-
-	for (unsigned i = first; i <= last; i++) {
-		retval = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_CTL), FMC_CTL_PER);
-		if (retval != ERROR_OK)
-			return retval;
-		retval = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_ADDR),
-				bank->base + bank->sectors[i].offset);
-		if (retval != ERROR_OK)
-			return retval;
-		retval = target_write_u32(target,
-				gd32vf103_get_flash_reg(bank, FMC_CTL), FMC_CTL_PER | FMC_CTL_START);
-		if (retval != ERROR_OK)
-			return retval;
-
-		retval = gd32vf103_wait_status_busy(bank, FLASH_ERASE_TIMEOUT);
-		if (retval != ERROR_OK)
-			return retval;
-
-		bank->sectors[i].is_erased = 1;
-	}
-
-	retval = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_CTL), FMC_CTL_LK);
-	if (retval != ERROR_OK)
-		return retval;
-
-	return ERROR_OK;
-}
-
-static int gd32vf103_protect(struct flash_bank *bank, int set, unsigned first, unsigned last)
-{
-	struct gd32vf103_flash_bank *gd32vf103_info = NULL;
-	struct target *target = bank->target;
-	uint16_t prot_reg[4] = {0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF};
-	int reg, bit;
-	int status;
-	uint32_t protection;
-
-	gd32vf103_info = bank->driver_priv;
-
-	if (target->state != TARGET_HALTED) {
-		LOG_ERROR("Target not halted");
-		return ERROR_TARGET_NOT_HALTED;
-	}
-
-	int retval = gd32vf103_check_operation_supported(bank);
-	if (ERROR_OK != retval)
-		return retval;
-
-	if ((first % gd32vf103_info->ppage_size) != 0) {
-		LOG_WARNING("aligned start protect sector to a %d sector boundary",
-				gd32vf103_info->ppage_size);
-		first = first - (first % gd32vf103_info->ppage_size);
-	}
-	if (((last + 1) % gd32vf103_info->ppage_size) != 0) {
-		LOG_WARNING("aligned end protect sector to a %d sector boundary",
-				gd32vf103_info->ppage_size);
-		last++;
-		last = last - (last % gd32vf103_info->ppage_size);
-		last--;
-	}
-
-	/* medium density - each bit refers to a 4bank protection
-	 * high density - each bit refers to a 2bank protection */
-	retval = target_read_u32(target, FMC_WP_B0, &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);
-	prot_reg[3] = (uint16_t)(protection >> 24);
-
-	if (gd32vf103_info->ppage_size == 2) {
-		/* high density flash */
-
-		/* bit 7 controls sector 62 - 255 protection */
-		if (last > 61) {
-			if (set)
-				prot_reg[3] &= ~(1 << 7);
-			else
-				prot_reg[3] |= (1 << 7);
-		}
-
-		if (first > 61)
-			first = 62;
-		if (last > 61)
-			last = 61;
-
-		for (unsigned i = first; i <= last; i++) {
-			reg = (i / gd32vf103_info->ppage_size) / 8;
-			bit = (i / gd32vf103_info->ppage_size) - (reg * 8);
-
-			if (set)
-				prot_reg[reg] &= ~(1 << bit);
-			else
-				prot_reg[reg] |= (1 << bit);
-		}
-	} else {
-		/* medium density flash */
-		for (unsigned i = first; i <= last; i++) {
-			reg = (i / gd32vf103_info->ppage_size) / 8;
-			bit = (i / gd32vf103_info->ppage_size) - (reg * 8);
-
-			if (set)
-				prot_reg[reg] &= ~(1 << bit);
-			else
-				prot_reg[reg] |= (1 << bit);
-		}
-	}
-
-	status = gd32vf103_erase_options(bank);
-	if (status != ERROR_OK)
-		return status;
-
-	gd32vf103_info->option_bytes.protection[0] = prot_reg[0];
-	gd32vf103_info->option_bytes.protection[1] = prot_reg[1];
-	gd32vf103_info->option_bytes.protection[2] = prot_reg[2];
-	gd32vf103_info->option_bytes.protection[3] = prot_reg[3];
-
-	return gd32vf103_write_options(bank);
-}
-
-static int gd32vf103_write_block(struct flash_bank *bank, const uint8_t *buffer,
-		uint32_t offset, uint32_t count)
-{
-	struct gd32vf103_flash_bank *gd32vf103_info = bank->driver_priv;
-	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];
-	int retval = ERROR_OK;
-
-	static const uint8_t gd32vf103_flash_write_code[] = {
-#include "../../../contrib/loaders/flash/gd32v/gd32vf103.inc"
-	};
-
-	/* flash write code */
-	if (target_alloc_working_area(target, sizeof(gd32vf103_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(gd32vf103_flash_write_code), gd32vf103_flash_write_code);
-	if (retval != ERROR_OK) {
-		target_free_working_area(target, write_algorithm);
-		return retval;
-	}
-
-	/* memory buffer */
-	while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK) {
-		buffer_size /= 2;
-		buffer_size &= ~3UL; /* Make sure it's 4 byte aligned */
-		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;
-		}
-	}
-
-	init_reg_param(&reg_params[0], "a0", 32, PARAM_IN_OUT);	/* flash base (in), status (out) */
-	init_reg_param(&reg_params[1], "a1", 32, PARAM_OUT);	/* count (halfword-16bit) */
-	init_reg_param(&reg_params[2], "a2", 32, PARAM_OUT);	/* buffer start */
-	init_reg_param(&reg_params[3], "a3", 32, PARAM_OUT);	/* buffer end */
-	init_reg_param(&reg_params[4], "a4", 32, PARAM_IN_OUT);	/* target address */
-
-
-	uint32_t wp_addr = source->address;
-	uint32_t rp_addr = source->address + 4;
-	uint32_t fifo_start_addr = source->address + 8;
-	uint32_t fifo_end_addr = source->address + source->size;
-
-	uint32_t wp = fifo_start_addr;
-	uint32_t rp = fifo_start_addr;
-	uint32_t thisrun_bytes = fifo_end_addr-fifo_start_addr-2; /* (2:block size) */
-
-	retval = target_write_u32(target, rp_addr, rp);
-	if (retval != ERROR_OK)
-		return retval;
-
-	while (count > 0) {
-		retval = target_read_u32(target, rp_addr, &rp);
-		if (retval != ERROR_OK) {
-			LOG_ERROR("failed to get read pointer");
-			break;
-		}
-
-		if (wp != rp) {
-			LOG_ERROR("Failed to write flash ;;  rp = 0x%x ;;; wp = 0x%x", rp, wp);
-			break;
-		}
-		wp = fifo_start_addr;
-		rp = fifo_start_addr;
-		retval = target_write_u32(target, rp_addr, rp);
-		if (retval != ERROR_OK)
-			break;
-		/* Limit to the amount of data we actually want to write */
-		if (thisrun_bytes > count * 2)
-			thisrun_bytes = count * 2;
-
-		/* Write data to fifo */
-		retval = target_write_buffer(target, wp, thisrun_bytes, buffer);
-		if (retval != ERROR_OK)
-			break;
-
-		/* Update counters and wrap write pointer */
-		buffer += thisrun_bytes;
-		count -= thisrun_bytes / 2;
-		rp = fifo_start_addr;
-		wp = fifo_start_addr+thisrun_bytes;
-
-		/* Store updated write pointer to target */
-		retval = target_write_u32(target, wp_addr, wp);
-		if (retval != ERROR_OK)
-			break;
-		retval = target_write_u32(target, rp_addr, rp);
-		if (retval != ERROR_OK)
-			return retval;
-
-		buf_set_u32(reg_params[0].value, 0, 32, gd32vf103_info->register_base);
-		buf_set_u32(reg_params[1].value, 0, 32, thisrun_bytes/2);
-		buf_set_u32(reg_params[2].value, 0, 32, source->address);
-		buf_set_u32(reg_params[3].value, 0, 32, source->address + source->size);
-		buf_set_u32(reg_params[4].value, 0, 32, address);
-
-		retval = target_run_algorithm(target, 0, NULL, 5, reg_params,
-				write_algorithm->address, write_algorithm->address+4,
-				10000, NULL);
-
-		if (retval != ERROR_OK) {
-			LOG_ERROR("Failed to execute algorithm at 0x%" TARGET_PRIxADDR ": %d",
-					write_algorithm->address, retval);
-			return retval;
-			}
-		address += thisrun_bytes;
-
-	}
-
-
-	if (retval == ERROR_FLASH_OPERATION_FAILED) {
-		LOG_ERROR("flash write failed at address 0x%"PRIx32,
-				buf_get_u32(reg_params[4].value, 0, 32));
-
-		if (buf_get_u32(reg_params[0].value, 0, 32) & FMC_STAT_PGERR) {
-			LOG_ERROR("flash memory not erased before writing");
-			/* Clear but report errors */
-			target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_STAT), FMC_STAT_PGERR);
-		}
-
-		if (buf_get_u32(reg_params[0].value, 0, 32) & FMC_STAT_WPERR) {
-			LOG_ERROR("flash memory write protected");
-			/* Clear but report errors */
-			target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_STAT), FMC_STAT_WPERR);
-		}
-	}
-
-	target_free_working_area(target, source);
-	target_free_working_area(target, write_algorithm);
-
-	destroy_reg_param(&reg_params[0]);
-	destroy_reg_param(&reg_params[1]);
-	destroy_reg_param(&reg_params[2]);
-	destroy_reg_param(&reg_params[3]);
-	destroy_reg_param(&reg_params[4]);
-
-	return retval;
-}
-
-static int gd32vf103_write(struct flash_bank *bank, const uint8_t *buffer,
-		uint32_t offset, uint32_t count)
-{
-	struct target *target = bank->target;
-	uint8_t *new_buffer = NULL;
-
-
-	if (bank->target->state != TARGET_HALTED) {
-		LOG_ERROR("Target not halted");
-		return ERROR_TARGET_NOT_HALTED;
-	}
-
-	if (offset & 0x1) {
-		LOG_ERROR("offset 0x%" PRIx32 " breaks required 2-byte alignment", offset);
-		return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
-	}
-
-	/* If there's an odd number of bytes, the data has to be padded. Duplicate
-	 * the buffer and use the normal code path with a single block write since
-	 * it's probably cheaper than to special case the last odd write using
-	 * discrete accesses. */
-	if (count & 1) {
-		new_buffer = malloc(count + 1);
-		if (new_buffer == NULL) {
-			LOG_ERROR("odd number of bytes to write and no memory for padding buffer");
-			return ERROR_FAIL;
-		}
-		LOG_INFO("odd number of bytes to write, padding with 0xff");
-		buffer = memcpy(new_buffer, buffer, count);
-		new_buffer[count++] = 0xff;
-	}
-
-	uint32_t words_remaining = count / 2;
-	int retval, retval2;
-
-	/* unlock flash registers */
-	retval = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_KEY), UNLOCK_KEY0);
-	if (retval != ERROR_OK)
-		goto cleanup;
-	retval = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_KEY), UNLOCK_KEY1);
-	if (retval != ERROR_OK)
-		goto cleanup;
-
-	retval = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_CTL), FMC_CTL_PG);
-	if (retval != ERROR_OK)
-		goto cleanup;
-
-	/* try using a block write */
-	retval = gd32vf103_write_block(bank, buffer, offset, words_remaining);
-
-	if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE) {
-		/* if block write failed (no sufficient working area),
-		 * we use normal (slow) single halfword accesses */
-		LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
-
-		while (words_remaining > 0) {
-			uint16_t value;
-			memcpy(&value, buffer, sizeof(uint16_t));
-
-			retval = target_write_u16(target, bank->base + offset, value);
-			if (retval != ERROR_OK)
-				goto reset_pg_and_lock;
-
-			retval = gd32vf103_wait_status_busy(bank, 5);
-			if (retval != ERROR_OK)
-				goto reset_pg_and_lock;
-
-			words_remaining--;
-			buffer += 2;
-			offset += 2;
-		}
-	}
-
-reset_pg_and_lock:
-	retval2 = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_CTL), FMC_CTL_LK);
-	if (retval == ERROR_OK)
-		retval = retval2;
-
-cleanup:
-	if (new_buffer)
-		free(new_buffer);
-
-	return retval;
-}
-
-static int gd32vf103_get_device_id(struct flash_bank *bank, uint32_t *device_id)
-{
-
-	struct target *target = bank->target;
-	uint32_t device_id_register = 0xE0042000;
-	/* read GD32VF103 device id register */
-	int retval = target_read_u32(target, device_id_register, device_id);
-	if (retval != ERROR_OK)
-		return retval;
-
-	return retval;
-}
-
-static int gd32vf103_get_flash_size(struct flash_bank *bank, uint16_t *flash_size_in_kb)
-{
-	struct target *target = bank->target;
-	uint32_t  flash_size_reg = 0x1FFFF7E0;
-
-	int  retval = target_read_u16(target, flash_size_reg, flash_size_in_kb);
-	if (retval != ERROR_OK)
-		return retval;
-
-	return retval;
-}
-
-static int gd32vf103_probe(struct flash_bank *bank)
-{
-	struct gd32vf103_flash_bank *gd32vf103_info = bank->driver_priv;
-	int i;
-	uint16_t flash_size_in_kb;
-	uint16_t max_flash_size_in_kb;
-	uint32_t device_id;
-	int page_size;
-	uint32_t base_address = 0x08000000;
-
-	gd32vf103_info->probed = 0;
-	gd32vf103_info->register_base = FLASH_REG_BASE_B0;
-	gd32vf103_info->user_data_offset = 10;
-	gd32vf103_info->option_offset = 0;
-
-	/* default factory protection level */
-	gd32vf103_info->default_rdp = 0x5AA5;
-
-	/* read gd32vf103 device id register */
-	int retval = gd32vf103_get_device_id(bank, &device_id);
-	if (retval != ERROR_OK)
-		return retval;
-
-	LOG_INFO("device id = 0x%08" PRIx32 "", device_id);
-
-	/* set page size, protection granularity and max flash size depending on family */
-	switch (device_id & 0xfff) {
-		case 0x410:
-		case 0x418: /* connectivity line density */
-			page_size = 1024;
-			gd32vf103_info->ppage_size = 4;
-			max_flash_size_in_kb = 128;
-			break;
-		default:
-			LOG_WARNING("Cannot identify target as a gd32vf103 family.");
-			return ERROR_FAIL;
-	}
-
-	/* get flash size from target. */
-	retval = gd32vf103_get_flash_size(bank, &flash_size_in_kb);
-	LOG_INFO("flash_size_in_kb = 0x%08" PRIx32 "", flash_size_in_kb);
-	/* failed reading flash size or flash size invalid, default to max target family */
-	if (retval != ERROR_OK || flash_size_in_kb == 0xffff || flash_size_in_kb == 0) {
-		LOG_WARNING("gd32vf103 flash size failed, probe inaccurate - assuming %dk flash",
-			max_flash_size_in_kb);
-		flash_size_in_kb = max_flash_size_in_kb;
-	}
-
-	if (gd32vf103_info->has_dual_banks) {
-		/* split reported size into matching bank */
-		if (bank->base != 0x08080000) {
-			/* bank 0 will be fixed 512k */
-			flash_size_in_kb = 512;
-		} else {
-			flash_size_in_kb -= 512;
-			/* bank1 also uses a register offset */
-			gd32vf103_info->register_base = FLASH_REG_BASE_B1;
-			base_address = 0x08080000;
-		}
-	}
-
-	/* if the user sets the size manually then ignore the probed value
-	 * this allows us to work around devices that have a invalid flash size register value */
-	if (gd32vf103_info->user_bank_size) {
-		LOG_INFO("ignoring flash probed value, using configured bank size");
-		flash_size_in_kb = gd32vf103_info->user_bank_size / 1024;
-	}
-
-	LOG_INFO("flash size = %dkbytes", flash_size_in_kb);
-
-	/* did we assign flash size? */
-	assert(flash_size_in_kb != 0xffff);
-
-	/* calculate numbers of pages */
-	int num_pages = flash_size_in_kb * 1024 / page_size;
-
-	/* 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 * 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;
-	}
-
-	gd32vf103_info->probed = 1;
-
-	return ERROR_OK;
-}
-
-static int gd32vf103_auto_probe(struct flash_bank *bank)
-{
-	struct gd32vf103_flash_bank *gd32vf103_info = bank->driver_priv;
-	if (gd32vf103_info->probed)
-		return ERROR_OK;
-	return gd32vf103_probe(bank);
-}
-
-static int get_gd32vf103_info(struct flash_bank *bank, struct command_invocation *cmd)
-{
-	uint32_t dbgmcu_idcode;
-
-		/* read gd32vf103 device id register */
-	int retval = gd32vf103_get_device_id(bank, &dbgmcu_idcode);
-	if (retval != ERROR_OK)
-		return retval;
-
-	uint16_t device_id = dbgmcu_idcode & 0xfff;
-	uint16_t rev_id = dbgmcu_idcode >> 16;
-	const char *device_str;
-	const char *rev_str = NULL;
-
-	switch (device_id) {
-
-	case 0x418:
-		device_str = "gd32vf103 (gdm32501)";
-
-		switch (rev_id) {
-		case 0x1000:
-			rev_str = "A";
-			break;
-
-		case 0x1001:
-			rev_str = "B";
-			break;
-		}
-		break;
-	default:
-		command_print_sameline(cmd, "Cannot identify target as a GD32VF103 x\n");
-		return ERROR_FAIL;
-	}
-
-	if (rev_str != NULL)
-		command_print_sameline(cmd, "%s - Rev: %s\n", device_str, rev_str);
-	else
-		command_print_sameline(cmd, "%s - Rev: unknown (0x%04x)\n", device_str, rev_id);
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(gd32vf103_handle_lock_command)
-{
-	struct target *target = NULL;
-	struct gd32vf103_flash_bank *gd32vf103_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;
-
-	gd32vf103_info = bank->driver_priv;
-
-	target = bank->target;
-
-	if (target->state != TARGET_HALTED) {
-		LOG_ERROR("Target not halted");
-		return ERROR_TARGET_NOT_HALTED;
-	}
-
-	retval = gd32vf103_check_operation_supported(bank);
-	if (ERROR_OK != retval)
-		return retval;
-
-	if (gd32vf103_erase_options(bank) != ERROR_OK) {
-		command_print(CMD, "gd32vf103 failed to erase options");
-		return ERROR_OK;
-	}
-
-	/* set readout protection */
-	gd32vf103_info->option_bytes.RDP = 0;
-
-	if (gd32vf103_write_options(bank) != ERROR_OK) {
-		command_print(CMD, "gd32vf103 failed to lock device");
-		return ERROR_OK;
-	}
-
-	command_print(CMD, "gd32vf103 locked");
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(gd32vf103_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;
-	}
-
-	retval = gd32vf103_check_operation_supported(bank);
-	if (ERROR_OK != retval)
-		return retval;
-
-	if (gd32vf103_erase_options(bank) != ERROR_OK) {
-		command_print(CMD, "gd32vf103 failed to unlock device");
-		return ERROR_OK;
-	}
-
-	if (gd32vf103_write_options(bank) != ERROR_OK) {
-		command_print(CMD, "gd32vf103 failed to lock device");
-		return ERROR_OK;
-	}
-
-	command_print(CMD, "gd32vf103 unlocked.\n"
-			"INFO: a reset or power cycle is required "
-			"for the new settings to take effect.");
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(gd32vf103_handle_options_read_command)
-{
-	uint32_t optionbyte;
-	struct target *target = NULL;
-	struct gd32vf103_flash_bank *gd32vf103_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;
-
-	gd32vf103_info = bank->driver_priv;
-
-	target = bank->target;
-
-	if (target->state != TARGET_HALTED) {
-		LOG_ERROR("Target not halted");
-		return ERROR_TARGET_NOT_HALTED;
-	}
-
-	retval = gd32vf103_check_operation_supported(bank);
-	if (ERROR_OK != retval)
-		return retval;
-
-	retval = target_read_u32(target, FMC_OBSTAT_B0, &optionbyte);
-	if (retval != ERROR_OK)
-		return retval;
-	command_print(CMD, "Option Byte: 0x%" PRIx32 "", optionbyte);
-
-	int user_data = optionbyte;
-
-	if (optionbyte >> FMC_OBSTAT_OBERR & 1)
-		command_print(CMD, "Option Byte Complement Error");
-
-	if (optionbyte >> FMC_OBSTAT_SPC & 1)
-		command_print(CMD, "Readout Protection On");
-	else
-		command_print(CMD, "Readout Protection Off");
-
-	/* user option bytes are offset depending on variant */
-	optionbyte >>= gd32vf103_info->option_offset;
-
-	if (optionbyte >> FMC_OBSTAT_WDG_SW & 1)
-		command_print(CMD, "Software Watchdog");
-	else
-		command_print(CMD, "Hardware Watchdog");
-
-	if (optionbyte >> FMC_OBSTAT_RST_DSLEEP & 1)
-		command_print(CMD, "Stop: No reset generated");
-	else
-		command_print(CMD, "Stop: Reset generated");
-
-	if (optionbyte >> FMC_OBSTAT_RST_STDBY & 1)
-		command_print(CMD, "Standby: No reset generated");
-	else
-		command_print(CMD, "Standby: Reset generated");
-
-	if (gd32vf103_info->has_dual_banks) {
-		if (optionbyte >> FMC_OBSTAT_BB & 1)
-			command_print(CMD, "Boot: Bank 0");
-		else
-			command_print(CMD, "Boot: Bank 1");
-	}
-
-	command_print(CMD, "User Option0: 0x%02" PRIx8,
-			(uint8_t)((user_data >> gd32vf103_info->user_data_offset) & 0xff));
-	command_print(CMD, "User Option1: 0x%02" PRIx8,
-			(uint8_t)((user_data >> (gd32vf103_info->user_data_offset + 8)) & 0xff));
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(gd32vf103_handle_options_write_command)
-{
-	struct target *target = NULL;
-	struct gd32vf103_flash_bank *gd32vf103_info = NULL;
-	uint16_t optionbyte;
-
-	if (CMD_ARGC < 2)
-		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;
-
-	gd32vf103_info = bank->driver_priv;
-
-	target = bank->target;
-
-	if (target->state != TARGET_HALTED) {
-		LOG_ERROR("Target not halted");
-		return ERROR_TARGET_NOT_HALTED;
-	}
-
-	retval = gd32vf103_check_operation_supported(bank);
-	if (ERROR_OK != retval)
-		return retval;
-
-	retval = gd32vf103_read_options(bank);
-	if (ERROR_OK != retval)
-		return retval;
-
-	/* start with current options */
-	optionbyte = gd32vf103_info->option_bytes.user_options;
-
-	/* skip over flash bank */
-	CMD_ARGC--;
-	CMD_ARGV++;
-
-	while (CMD_ARGC) {
-		if (strcmp("SWWDG", CMD_ARGV[0]) == 0)
-			optionbyte |= (1 << 0);
-		else if (strcmp("HWWDG", CMD_ARGV[0]) == 0)
-			optionbyte &= ~(1 << 0);
-		else if (strcmp("NORSTSTOP", CMD_ARGV[0]) == 0)
-			optionbyte |= (1 << 1);
-		else if (strcmp("RSTSTOP", CMD_ARGV[0]) == 0)
-			optionbyte &= ~(1 << 1);
-		else if (strcmp("NORSTSTNDBY", CMD_ARGV[0]) == 0)
-			optionbyte |= (1 << 2);
-		else if (strcmp("RSTSTNDBY", CMD_ARGV[0]) == 0)
-			optionbyte &= ~(1 << 2);
-		else if (gd32vf103_info->has_dual_banks) {
-			if (strcmp("BOOT0", CMD_ARGV[0]) == 0)
-				optionbyte |= (1 << 3);
-			else if (strcmp("BOOT1", CMD_ARGV[0]) == 0)
-				optionbyte &= ~(1 << 3);
-			else
-				return ERROR_COMMAND_SYNTAX_ERROR;
-		} else
-			return ERROR_COMMAND_SYNTAX_ERROR;
-		CMD_ARGC--;
-		CMD_ARGV++;
-	}
-
-	if (gd32vf103_erase_options(bank) != ERROR_OK) {
-		command_print(CMD, "gd32vf103 failed to erase options");
-		return ERROR_OK;
-	}
-
-	gd32vf103_info->option_bytes.user_options = optionbyte;
-
-	if (gd32vf103_write_options(bank) != ERROR_OK) {
-		command_print(CMD, "gd32vf103 failed to write options");
-		return ERROR_OK;
-	}
-
-	command_print(CMD, "gd32vf103 write options complete.\n"
-				"INFO: a reset or power cycle is required "
-				"for the new settings to take effect.");
-
-	return ERROR_OK;
-}
-
-static int gd32vf103_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, gd32vf103_get_flash_reg(bank, FMC_KEY), UNLOCK_KEY0);
-	if (retval != ERROR_OK)
-		return retval;
-	retval = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_KEY), UNLOCK_KEY1);
-	if (retval != ERROR_OK)
-		return retval;
-
-	/* mass erase flash memory */
-	retval = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_CTL), FMC_CTL_MER);
-	if (retval != ERROR_OK)
-		return retval;
-	retval = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_CTL),
-			FMC_CTL_MER | FMC_CTL_START);
-	if (retval != ERROR_OK)
-		return retval;
-
-	retval = gd32vf103_wait_status_busy(bank, FLASH_ERASE_TIMEOUT);
-	if (retval != ERROR_OK)
-		return retval;
-
-	retval = target_write_u32(target, gd32vf103_get_flash_reg(bank, FMC_CTL), FMC_CTL_LK);
-	if (retval != ERROR_OK)
-		return retval;
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(gd32vf103_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 = gd32vf103_mass_erase(bank);
-	if (retval == ERROR_OK) {
-		/* set all sectors as erased */
-		for (unsigned i = 0; i < bank->num_sectors; i++)
-			bank->sectors[i].is_erased = 1;
-
-		command_print(CMD, "gd32vf103 mass erase complete");
-	} else
-		command_print(CMD, "gd32vf103 mass erase failed");
-
-	return retval;
-}
-
-static const struct command_registration gd32vf103_exec_command_handlers[] = {
-	{
-		.name = "lock",
-		.handler = gd32vf103_handle_lock_command,
-		.mode = COMMAND_EXEC,
-		.usage = "bank_id",
-		.help = "Lock entire flash device.",
-	},
-	{
-		.name = "unlock",
-		.handler = gd32vf103_handle_unlock_command,
-		.mode = COMMAND_EXEC,
-		.usage = "bank_id",
-		.help = "Unlock entire protected flash device.",
-	},
-	{
-		.name = "mass_erase",
-		.handler = gd32vf103_handle_mass_erase_command,
-		.mode = COMMAND_EXEC,
-		.usage = "bank_id",
-		.help = "Erase entire flash device.",
-	},
-	{
-		.name = "options_read",
-		.handler = gd32vf103_handle_options_read_command,
-		.mode = COMMAND_EXEC,
-		.usage = "bank_id",
-		.help = "Read and display device option byte.",
-	},
-	{
-		.name = "options_write",
-		.handler = gd32vf103_handle_options_write_command,
-		.mode = COMMAND_EXEC,
-		.usage = "bank_id ('SWWDG'|'HWWDG') "
-			"('RSTSTNDBY'|'NORSTSTNDBY') "
-			"('RSTSTOP'|'NORSTSTOP')",
-		.help = "Replace bits in device option byte.",
-	},
-	COMMAND_REGISTRATION_DONE
-};
-
-static const struct command_registration gd32vf103_command_handlers[] = {
-	{
-		.name = "gd32vf103",
-		.mode = COMMAND_ANY,
-		.help = "gd32vf103 flash command group",
-		.usage = "",
-		.chain = gd32vf103_exec_command_handlers,
-	},
-	COMMAND_REGISTRATION_DONE
-};
-
-struct flash_driver gd32vf103_flash = {
-	.name = "gd32vf103",
-	.commands = gd32vf103_command_handlers,
-	.flash_bank_command = gd32vf103_flash_bank_command,
-	.erase = gd32vf103_erase,
-	.protect = gd32vf103_protect,
-	.write = gd32vf103_write,
-	.read = default_flash_read,
-	.probe = gd32vf103_probe,
-	.auto_probe = gd32vf103_auto_probe,
-	.erase_check = default_flash_blank_check,
-	.protect_check = gd32vf103_protect_check,
-	.info = get_gd32vf103_info,
-	.free_driver_priv = default_flash_free_driver_priv,
-};