Somewhat related: While hacking I accidentally wrote a bad version to the flash and got annoyed that you can't easily debrick over JTAG (unless you can make the RAM initialization work and upload a RAM u-boot) and my SPI-programmer didn't seem to work for in-circuit programming (tried keeping the CPU in reset, didn't help).
Since I didn't want to unsolder the SPI I looked into adding the proper necessary flash programming support to OpenOCD and now have this (@500kHz JTAG clock, doesn't get much faster with higher clocks since with the FTDI2232 the effective speed is severly limited by the USB round-trip-time):
diff -x minidriver_imp.h -x xscale_debug.inc -x startup_tcl.inc -x startup.tcl -x openocd -x Makefile.in -x Makefile -Nru openocd-0.9.0-vanilla/src/flash/nor/ath79.c openocd-0.9.0/src/flash/nor/ath79.c
--- openocd-0.9.0-vanilla/src/flash/nor/ath79.c 1970-01-01 01:00:00.000000000 +0100
+++ openocd-0.9.0/src/flash/nor/ath79.c 2015-10-24 19:08:21.814867892 +0200
@@ -0,0 +1,807 @@
+/***************************************************************************
+ * Copyright (C) 2010 by Antonio Borneo <borneo.antonio@gmail.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. *
+ ***************************************************************************/
+
+/* STM Serial Memory Interface (SMI) controller is a SPI bus controller
+ * specifically designed for SPI memories.
+ * Only SPI "mode 3" (CPOL=1 and CPHA=1) is supported.
+ * Two working modes are available:
+ * - SW mode: the SPI is controlled by SW. Any custom commands can be sent
+ * on the bus.
+ * - HW mode: the SPI but is under SMI control. Memory content is directly
+ * accessible in CPU memory space. CPU can read, write and execute memory
+ * content. */
+
+/* ATTENTION:
+ * To have flash memory mapped in CPU memory space, the SMI controller
+ * have to be in "HW mode". This requires following constraints:
+ * 1) The command "reset init" have to initialize SMI controller and put
+ * it in HW mode;
+ * 2) every command in this file have to return to prompt in HW mode. */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "imp.h"
+#include "spi.h"
+#include <jtag/jtag.h>
+#include <helper/time_support.h>
+#include <target/mips32.h>
+#include <target/mips32_pracc.h>
+
+#define ATH79_REG_FS 0
+#define ATH79_REG_CLOCK 4
+#define ATH79_REG_WRITE 8
+#define ATH79_REG_DATA 12
+
+#define AR7240_SPI_CS_DIS 0xf0000
+#define AR7240_SPI_CE_LOW 0x60000
+#define AR7240_SPI_CE_HIGH 0x60100
+
+#define SMI_READ_REG(a) (0)
+#define SMI_WRITE_REG(a, v) (0)
+
+#define READ_REG(a) (_READ_REG(a))
+#define _READ_REG(a) \
+{ \
+ int __a; \
+ uint32_t __v; \
+ \
+ __a = target_read_u32(target, io_base + (a), &__v); \
+ if (__a != ERROR_OK) \
+ return __a; \
+ return __v; \
+}
+
+#define WRITE_REG(a, v) \
+{ \
+ int __r; \
+ \
+ __r = target_write_u32(target, io_base + (a), (v)); \
+ if (__r != ERROR_OK) \
+ return __r; \
+}
+
+#if 0
+static uint32_t ath79_read_reg(struct target *target, uint32_t reg) {
+ uint32_t v = 0;
+ int err = target_read_u32(target, 0xbf000000 + reg, &v);
+ if (err != ERROR_OK) {
+ LOG_ERROR("target_read_u32 failed");
+ }
+ return v;
+}
+
+static void ath79_write_reg(struct target *target, uint32_t reg, uint32_t value) {
+ int err = target_write_u32(target, 0xbf000000 + reg, value);
+ if (err != ERROR_OK) {
+ LOG_ERROR("target_read_u32 failed");
+ }
+}
+#endif
+
+static int ath79_spi_bitbang_bytes(struct target *target, uint32_t io_base,
+ int pre_deselect, int post_deselect,
+ uint8_t *data, int len) {
+ LOG_DEBUG("ath79_spi_bitbang_bytes(%p, %08x, %d, %d, %p, %d)",
+ target, io_base, pre_deselect, post_deselect, data, len);
+ struct mips32_common *mips32 = target_to_mips32(target);
+ struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
+
+ uint32_t pracc_out = 0;
+
+ const int pracc_pre_post = 26;
+ const int pracc_loop_byte = 8 * 2 + 2;
+
+ struct pracc_queue_info ctx = {.max_code = pracc_pre_post + len * pracc_loop_byte};
+ uint32_t *out = malloc(len + 3);
+ memset(out, 0xa5, len + 3);
+
+ pracc_queue_init(&ctx);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+
+ /* Calculate largest len given the available instruction budget. */
+ const int max_len = (PRACC_OUT_OFFSET / 4 - pracc_pre_post) / pracc_loop_byte;
+ if (len > max_len) {
+ LOG_INFO("len too big: %d > %d", len, max_len);
+ ctx.retval = ERROR_BUF_TOO_SMALL;
+ goto exit;
+ } else {
+ LOG_DEBUG("max len %d. len %d => max code %d", max_len, len, ctx.max_code);
+ }
+
+ pracc_add(&ctx, 0, MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR)); /* $15 = MIPS32_PRACC_BASE_ADDR */
+ pracc_add(&ctx, 0, MIPS32_LUI(1, UPPER16(io_base))); /* $1 = io_base */
+ if (pre_deselect) {
+ /* [$1 + FS] = 1 (enable flash io register access) */
+ pracc_add(&ctx, 0, MIPS32_LUI(2, UPPER16(1)));
+ pracc_add(&ctx, 0, MIPS32_ORI(2, 2, LOWER16(1)));
+ pracc_add(&ctx, 0, MIPS32_SW(2, ATH79_REG_FS, 1));
+ /* deselect flash just in case */
+ pracc_add(&ctx, 0, MIPS32_LUI(2, UPPER16(AR7240_SPI_CS_DIS))); /* $2 = SPI_CS_DIS */
+ pracc_add(&ctx, 0, MIPS32_ORI(2, 2, LOWER16(AR7240_SPI_CS_DIS))); /* $2 = SPI_CS_DIS */
+ pracc_add(&ctx, 0, MIPS32_SW(2, ATH79_REG_WRITE, 1)); /* [$1 + WRITE] = $2 */
+ }
+ /* t0 = CLOCK_LOW + 0-bit */
+ pracc_add(&ctx, 0, MIPS32_LUI(8, UPPER16((AR7240_SPI_CE_LOW + 0))));
+ pracc_add(&ctx, 0, MIPS32_ORI(8, 8, LOWER16((AR7240_SPI_CE_LOW + 0))));
+ /* t1 = CLOCK_LOW + 1-bit */
+ pracc_add(&ctx, 0, MIPS32_LUI(9, UPPER16((AR7240_SPI_CE_LOW + 1))));
+ pracc_add(&ctx, 0, MIPS32_ORI(9, 9, LOWER16((AR7240_SPI_CE_LOW + 1))));
+ /* t2 = CLOCK_HIGH + 0-bit */
+ pracc_add(&ctx, 0, MIPS32_LUI(10, UPPER16((AR7240_SPI_CE_HIGH + 0))));
+ pracc_add(&ctx, 0, MIPS32_ORI(10, 10, LOWER16((AR7240_SPI_CE_HIGH + 0))));
+ /* t2 = CLOCK_HIGH + 1-bit */
+ pracc_add(&ctx, 0, MIPS32_LUI(11, UPPER16((AR7240_SPI_CE_HIGH + 1))));
+ pracc_add(&ctx, 0, MIPS32_ORI(11, 11, LOWER16((AR7240_SPI_CE_HIGH + 1))));
+
+ for (int i = 0; i < len; i++) {
+ uint8_t x = data[i];
+ LOG_DEBUG("%d: generating code for %02x", i, x);
+ for (int j=0; j<8; j++) {
+ int bit = ((x << j) & 0x80) == 0x80;
+
+ LOG_DEBUG(" %d: generating code for bit %d", j, bit);
+ if (bit) {
+ /* [$1 + WRITE] = t1 */
+ pracc_add(&ctx, 0, MIPS32_SW(9, ATH79_REG_WRITE, 1));
+ /* [$1 + WRITE] = t3 */
+ pracc_add(&ctx, 0, MIPS32_SW(11, ATH79_REG_WRITE, 1));
+ } else {
+ /* [$1 + WRITE] = t0 */
+ pracc_add(&ctx, 0, MIPS32_SW(8, ATH79_REG_WRITE, 1));
+ /* [$1 + WRITE] = t2 */
+ pracc_add(&ctx, 0, MIPS32_SW(10, ATH79_REG_WRITE, 1));
+ }
+ }
+ if (i % 4 == 3) {
+ /* $3 = [$1 + DATA] */
+ pracc_add(&ctx, 0, MIPS32_LW(3, ATH79_REG_DATA, 1)); /* $3 = [$1 + DATA] */
+ /* [OUTi] = $3 */
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + pracc_out,
+ MIPS32_SW(3, PRACC_OUT_OFFSET + pracc_out, 15));
+ pracc_out += 4;
+ }
+ }
+ if (len & 3) { /* not a multiple of 4 bytes */
+ /* $3 = [$1 + DATA] */
+ pracc_add(&ctx, 0, MIPS32_LW(3, ATH79_REG_DATA, 1)); /* $3 = [$1 + DATA] */
+ /* [OUTi] = $3 */
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + pracc_out,
+ MIPS32_SW(3, PRACC_OUT_OFFSET + pracc_out, 15));
+ pracc_out += 4;
+ }
+
+ if (post_deselect) {
+ pracc_add(&ctx, 0, MIPS32_LUI(2, UPPER16(AR7240_SPI_CS_DIS))); /* $2 = SPI_CS_DIS */
+ pracc_add(&ctx, 0, MIPS32_ORI(2, 2, LOWER16(AR7240_SPI_CS_DIS))); /* $2 = SPI_CS_DIS */
+ pracc_add(&ctx, 0, MIPS32_SW(2, ATH79_REG_WRITE, 1)); /* [$1 + WRITE] = $2 */
+
+ /* [$1 + FS] = 0 (disable flash io register access) */
+ pracc_add(&ctx, 0, MIPS32_XORI(2, 2, 0));
+ pracc_add(&ctx, 0, MIPS32_SW(2, ATH79_REG_FS, 1));
+ }
+
+ /* common pracc epilogue */
+ pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0)); /* restore $15 from DeSave */
+
+ LOG_DEBUG("Assembled %d instructions, %d stores:", ctx.code_count, ctx.store_count);
+ for (int i = 0; i < ctx.code_count; i++) {
+ LOG_DEBUG("%08x", ctx.pracc_list[i]);
+ }
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, out);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+
+ int pracc_words = pracc_out / 4;
+ if (len & 3) { /* not a multiple of 4 bytes */
+ /* Need to realign last word. */
+ out[pracc_words - 1] <<= 8 * (4 - len);
+ }
+ if (1234 != ntohl(1234)) {
+ /* byteswap buffer */
+ for (int i = 0; i < pracc_words; i++) {
+ out[i] = ntohl(out[i]);
+ }
+ }
+ for (int i = 0; i < len; i++) {
+ LOG_DEBUG("bitbang %02x => %02x",
+ data[i], ((uint8_t*)out)[i]);
+ }
+ memcpy(data, out, len);
+
+exit:
+ if (ctx.retval != ERROR_OK) {
+ memset(data, 0x5a, len);
+ }
+ if (out != NULL)
+ free(out);
+ pracc_queue_free(&ctx);
+ return ctx.retval;
+}
+
+#define SMI_POLL_TFF(timeout)
+#define SMI_SET_SW_MODE()
+#define SMI_SET_HWWB_MODE()
+#define SMI_SET_HW_MODE()
+#define SMI_CLEAR_TFF()
+
+#define SMI_BANK_SIZE (0x01000000)
+
+#define SMI_CR1 (0x00) /* Control register 1 */
+#define SMI_CR2 (0x04) /* Control register 2 */
+#define SMI_SR (0x08) /* Status register */
+#define SMI_TR (0x0c) /* TX */
+#define SMI_RR (0x10) /* RX */
+
+/* fields in SMI_CR1 */
+#define SMI_SW_MODE 0x10000000 /* set to enable SW Mode */
+#define SMI_WB_MODE 0x20000000 /* Write Burst Mode */
+
+/* fields in SMI_CR2 */
+#define SMI_TX_LEN_1 0x00000001 /* data length = 1 byte */
+#define SMI_TX_LEN_4 0x00000004 /* data length = 4 byte */
+#define SMI_RX_LEN_3 0x00000030 /* data length = 3 byte */
+#define SMI_SEND 0x00000080 /* Send data */
+#define SMI_RSR 0x00000400 /* reads status reg */
+#define SMI_WE 0x00000800 /* Write Enable */
+#define SMI_SEL_BANK0 0x00000000 /* Select Bank0 */
+#define SMI_SEL_BANK1 0x00001000 /* Select Bank1 */
+#define SMI_SEL_BANK2 0x00002000 /* Select Bank2 */
+#define SMI_SEL_BANK3 0x00003000 /* Select Bank3 */
+
+/* fields in SMI_SR */
+#define SMI_TFF 0x00000100 /* Transfer Finished Flag */
+
+/* Commands */
+#define SMI_READ_ID 0x0000009F /* Read Flash Identification */
+
+/* Timeout in ms */
+#define SMI_CMD_TIMEOUT (100)
+#define SMI_PROBE_TIMEOUT (100)
+#define SMI_MAX_TIMEOUT (3000)
+
+struct ath79_flash_bank {
+ int probed;
+ uint32_t io_base;
+ uint32_t bank_num;
+ const struct flash_device *dev;
+};
+
+struct ath79_target {
+ char *name;
+ uint32_t tap_idcode;
+ uint32_t smi_base;
+ uint32_t io_base;
+};
+
+static const struct ath79_target target_devices[] = {
+ /* name, tap_idcode, smi_base, io_base */
+ { "ATH79", 0x00000001, 0xbf000000, 0xbf000000 },
+ { NULL, 0, 0, 0 }
+};
+
+FLASH_BANK_COMMAND_HANDLER(ath79_flash_bank_command)
+{
+ struct ath79_flash_bank *ath79_info;
+
+ LOG_DEBUG("%s", __func__);
+
+ if (CMD_ARGC < 6)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+
+ ath79_info = malloc(sizeof(struct ath79_flash_bank));
+ if (ath79_info == NULL) {
+ LOG_ERROR("not enough memory");
+ return ERROR_FAIL;
+ }
+
+ bank->driver_priv = ath79_info;
+ ath79_info->probed = 0;
+
+ return ERROR_OK;
+}
+
+/* Read the status register of the external SPI flash chip.
+ * The operation is triggered by setting SMI_RSR bit.
+ * SMI sends the proper SPI command (0x05) and returns value in SMI_SR */
+static int read_status_reg(struct flash_bank *bank, uint32_t *status)
+{
+ struct target *target = bank->target;
+ struct ath79_flash_bank *ath79_info = bank->driver_priv;
+ uint32_t io_base = ath79_info->io_base;
+
+ uint8_t spi_bytes[] = {SPIFLASH_READ_STATUS, 0};
+
+ /* Send SPI command "read STATUS" */
+ int retval = ath79_spi_bitbang_bytes(
+ target, io_base, 1, 1, spi_bytes, sizeof(spi_bytes));
+
+ *status = spi_bytes[1];
+
+ return retval;
+}
+
+/* check for WIP (write in progress) bit in status register */
+/* timeout in ms */
+static int wait_till_ready(struct flash_bank *bank, int timeout)
+{
+ uint32_t status;
+ int retval;
+ long long endtime;
+
+ endtime = timeval_ms() + timeout;
+ do {
+ /* read flash status register */
+ retval = read_status_reg(bank, &status);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if ((status & SPIFLASH_BSY_BIT) == 0)
+ return ERROR_OK;
+ alive_sleep(1);
+ } while (timeval_ms() < endtime);
+
+ LOG_ERROR("timeout");
+ return ERROR_FAIL;
+}
+
+/* Send "write enable" command to SPI flash chip.
+ * The operation is triggered by setting SMI_WE bit, and SMI sends
+ * the proper SPI command (0x06) */
+static int smi_write_enable(struct flash_bank *bank)
+{
+ struct target *target = bank->target;
+ struct ath79_flash_bank *ath79_info = bank->driver_priv;
+ uint32_t io_base = ath79_info->io_base;
+ uint32_t status;
+ int retval;
+
+ uint8_t spi_bytes[] = {SPIFLASH_WRITE_ENABLE};
+
+ /* Send SPI command "write enable" */
+ retval = ath79_spi_bitbang_bytes(
+ target, io_base, 1, 1, spi_bytes, sizeof(spi_bytes));
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* read flash status register */
+ retval = read_status_reg(bank, &status);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* Check write enabled */
+ if ((status & SPIFLASH_WE_BIT) == 0) {
+ LOG_ERROR("Cannot enable write to flash. Status=0x%08" PRIx32, status);
+ return ERROR_FAIL;
+ }
+
+ return ERROR_OK;
+}
+
+static int erase_command(struct flash_bank *bank, int sector)
+{
+ struct ath79_flash_bank *ath79_info = bank->driver_priv;
+ struct target *target = bank->target;
+ uint32_t io_base = ath79_info->io_base;
+ uint32_t offset = bank->sectors[sector].offset;
+
+ uint8_t spi_bytes[] = {
+ ath79_info->dev->erase_cmd,
+ offset >> 16,
+ offset >> 8,
+ offset
+ };
+
+ /* bitbang command */
+ return ath79_spi_bitbang_bytes(
+ target, io_base, 1, 1, spi_bytes, sizeof(spi_bytes));
+}
+
+static int smi_erase_sector(struct flash_bank *bank, int sector)
+{
+ int retval;
+
+ retval = smi_write_enable(bank);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* send SPI command "block erase" */
+ retval = erase_command(bank, sector);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* poll WIP for end of self timed Sector Erase cycle */
+ retval = wait_till_ready(bank, SMI_MAX_TIMEOUT);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return ERROR_OK;
+}
+
+static int ath79_erase(struct flash_bank *bank, int first, int last)
+{
+ struct target *target = bank->target;
+ struct ath79_flash_bank *ath79_info = bank->driver_priv;
+ int retval = ERROR_OK;
+ int sector;
+
+ LOG_DEBUG("%s: from sector %d to sector %d", __func__, first, last);
+
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if ((first < 0) || (last < first) || (last >= bank->num_sectors)) {
+ LOG_ERROR("Flash sector invalid");
+ return ERROR_FLASH_SECTOR_INVALID;
+ }
+
+ if (!(ath79_info->probed)) {
+ LOG_ERROR("Flash bank not probed");
+ return ERROR_FLASH_BANK_NOT_PROBED;
+ }
+
+ for (sector = first; sector <= last; sector++) {
+ if (bank->sectors[sector].is_protected) {
+ LOG_ERROR("Flash sector %d protected", sector);
+ return ERROR_FAIL;
+ }
+ }
+
+ for (sector = first; sector <= last; sector++) {
+ retval = smi_erase_sector(bank, sector);
+ if (retval != ERROR_OK)
+ break;
+ keep_alive();
+ }
+
+ /* Switch to HW mode before return to prompt */
+ SMI_SET_HW_MODE();
+ return retval;
+}
+
+static int ath79_protect(struct flash_bank *bank, int set,
+ int first, int last)
+{
+ int sector;
+
+ for (sector = first; sector <= last; sector++)
+ bank->sectors[sector].is_protected = set;
+ return ERROR_OK;
+}
+
+static int ath79_write_page(struct flash_bank *bank, const uint8_t *buffer,
+ uint32_t address, uint32_t len)
+{
+ uint8_t spi_page_buf[0x100];
+ struct ath79_flash_bank *ath79_info = bank->driver_priv;
+ struct target *target = bank->target;
+ uint32_t io_base = ath79_info->io_base;
+ uint32_t written = 0;
+ uint8_t spi_cmd[] = {
+ SPIFLASH_PAGE_PROGRAM,
+ address >> 16,
+ address >> 8,
+ address,
+ };
+ int retval;
+
+ if (address & 0xff) {
+ LOG_ERROR("ath79_write_page: unaligned write address: %08x\n", address);
+ return ERROR_FAIL;
+ }
+
+ if (len > sizeof(spi_page_buf)) {
+ LOG_ERROR("ath79_write_page: length bigger than page size %ld: %d\n",
+ sizeof(spi_page_buf), len);
+ return ERROR_FAIL;
+ }
+
+ uint32_t i;
+ for (i = 0; i < len; i++) {
+ if (buffer[i] != 0xff)
+ break;
+ }
+ if (i == len) /* all 0xff, no need to program. */
+ return ERROR_OK;
+
+ address -= ath79_info->io_base;
+
+ LOG_INFO("writing %d bytes to flash page @0x%08x", len, address);
+
+ memcpy(spi_page_buf, buffer, len);
+
+ /* unlock writes */
+ retval = smi_write_enable(bank);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* bitbang command */
+ retval = ath79_spi_bitbang_bytes(
+ target, io_base, 1, 0, spi_cmd, sizeof(spi_cmd));
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* Length limit derived from pracc code size limit */
+ const uint32_t spi_max_len = 112;
+
+ while (len > spi_max_len) {
+ /* write blocks with len limited by pracc code size */
+ retval = ath79_spi_bitbang_bytes(
+ target, io_base, 0, 0, &spi_page_buf[written], spi_max_len);
+ if (retval != ERROR_OK)
+ return retval;
+
+ written += spi_max_len;
+ len -= spi_max_len;
+ }
+
+ /* write final block of data */
+ return ath79_spi_bitbang_bytes(
+ target, io_base, 0, 1, &spi_page_buf[written], len);
+}
+
+static int smi_write_buffer(struct flash_bank *bank, const uint8_t *buffer,
+ uint32_t address, uint32_t len)
+{
+ int retval;
+
+ LOG_DEBUG("%s: address=0x%08" PRIx32 " len=0x%08" PRIx32,
+ __func__, address, len);
+
+ while (len > 0) {
+ const uint32_t page_size = 0x100;
+
+ /* Page size is 256 bytes */
+ int page_len = len > 0x100 ? 0x100 : len;
+ retval = ath79_write_page(
+ bank, buffer, address, page_len);
+ if (retval != ERROR_OK)
+ return retval;
+
+ buffer += page_size;
+ address += page_size;
+ len -= page_len;
+ }
+
+ return ERROR_OK;
+}
+
+static int ath79_write(struct flash_bank *bank, const uint8_t *buffer,
+ uint32_t offset, uint32_t count)
+{
+ struct target *target = bank->target;
+ struct ath79_flash_bank *ath79_info = bank->driver_priv;
+ int sector;
+
+ LOG_DEBUG("%s: offset=0x%08" PRIx32 " count=0x%08" PRIx32,
+ __func__, offset, count);
+
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (offset + count > ath79_info->dev->size_in_bytes) {
+ LOG_WARNING("Write pasts end of flash. Extra data discarded.");
+ count = ath79_info->dev->size_in_bytes - offset;
+ }
+
+ /* Check sector protection */
+ for (sector = 0; sector < bank->num_sectors; sector++) {
+ /* Start offset in or before this sector? */
+ /* End offset in or behind this sector? */
+ if ((offset <
+ (bank->sectors[sector].offset + bank->sectors[sector].size))
+ && ((offset + count - 1) >= bank->sectors[sector].offset)
+ && bank->sectors[sector].is_protected) {
+ LOG_ERROR("Flash sector %d protected", sector);
+ return ERROR_FAIL;
+ }
+ }
+
+ return smi_write_buffer(bank, buffer, bank->base + offset, count);
+}
+
+/* Return ID of flash device */
+/* On exit, SW mode is kept */
+static int read_flash_id(struct flash_bank *bank, uint32_t *id)
+{
+ struct target *target = bank->target;
+ struct ath79_flash_bank *ath79_info = bank->driver_priv;
+ uint32_t io_base = ath79_info->io_base;
+ int retval;
+ uint8_t spi_bytes[] = {SPIFLASH_READ_ID, 0, 0, 0, 0, 0, 0, 0};
+ /* Read 8 bytes @0xbf060000 */
+ uint8_t spi_test[] = {3, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+ uint8_t spi_buf[12];
+
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+ memcpy(spi_buf, spi_test, sizeof(spi_test));
+ ath79_spi_bitbang_bytes(target, io_base, 1, 1,
+ spi_buf, 5);
+
+ memcpy(spi_buf, spi_test, sizeof(spi_test));
+ ath79_spi_bitbang_bytes(target, io_base, 1, 1,
+ spi_buf, 6);
+
+ memcpy(spi_buf, spi_test, sizeof(spi_test));
+ ath79_spi_bitbang_bytes(target, io_base, 1, 1,
+ spi_buf, 7);
+
+ memcpy(spi_buf, spi_test, sizeof(spi_test));
+ ath79_spi_bitbang_bytes(target, io_base, 1, 1,
+ spi_buf, 8);
+
+ memcpy(spi_buf, spi_test, sizeof(spi_test));
+ ath79_spi_bitbang_bytes(target, io_base, 1, 1,
+ spi_buf, 9);
+
+ memcpy(spi_buf, spi_test, sizeof(spi_test));
+ ath79_spi_bitbang_bytes(target, io_base, 1, 1,
+ spi_buf, 10);
+
+ memcpy(spi_buf, spi_test, sizeof(spi_test));
+ ath79_spi_bitbang_bytes(target, io_base, 1, 1,
+ spi_buf, 11);
+
+ memcpy(spi_buf, spi_test, sizeof(spi_test));
+ ath79_spi_bitbang_bytes(target, io_base, 1, 1,
+ spi_buf, 12);
+
+ /* Send SPI command "read ID" */
+ retval = ath79_spi_bitbang_bytes(target, io_base, 1, 1,
+ spi_bytes, sizeof(spi_bytes));
+ if (retval != ERROR_OK)
+ return retval;
+
+ *id = (spi_bytes[1] << 0)
+ | (spi_bytes[2] << 8)
+ | (spi_bytes[3] << 16);
+ LOG_ERROR("read_flash_id: %06x", *id);
+
+ return ERROR_OK;
+}
+
+static int ath79_probe(struct flash_bank *bank)
+{
+ struct target *target = bank->target;
+ struct ath79_flash_bank *ath79_info = bank->driver_priv;
+ uint32_t io_base;
+ struct flash_sector *sectors;
+ uint32_t id = 0; /* silence uninitialized warning */
+ const struct ath79_target *target_device;
+ int retval;
+
+ if (ath79_info->probed)
+ free(bank->sectors);
+ ath79_info->probed = 0;
+
+ for (target_device = target_devices ; target_device->name ; ++target_device)
+ if (target_device->tap_idcode == target->tap->idcode)
+ break;
+ if (!target_device->name) {
+ LOG_ERROR("Device ID 0x%" PRIx32 " is not known as SMI capable",
+ target->tap->idcode);
+ return ERROR_FAIL;
+ }
+
+ io_base = target_device->io_base;
+ ath79_info->io_base = io_base;
+
+ LOG_DEBUG("Valid SMI on device %s at address 0x%" PRIx32,
+ target_device->name, bank->base);
+
+ /* read and decode flash ID; returns in SW mode */
+ retval = read_flash_id(bank, &id);
+ SMI_SET_HW_MODE();
+ if (retval != ERROR_OK)
+ return retval;
+
+ ath79_info->dev = NULL;
+ for (const struct flash_device *p = flash_devices; p->name ; p++)
+ if (p->device_id == id) {
+ ath79_info->dev = p;
+ break;
+ }
+
+ if (!ath79_info->dev) {
+ LOG_ERROR("Unknown flash device (ID 0x%08" PRIx32 ")", id);
+ return ERROR_FAIL;
+ }
+
+ LOG_INFO("Found flash device \'%s\' (ID 0x%08" PRIx32 ")",
+ ath79_info->dev->name, ath79_info->dev->device_id);
+
+ /* Set correct size value */
+ bank->size = ath79_info->dev->size_in_bytes;
+
+ /* create and fill sectors array */
+ bank->num_sectors =
+ ath79_info->dev->size_in_bytes / ath79_info->dev->sectorsize;
+ sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
+ if (sectors == NULL) {
+ LOG_ERROR("not enough memory");
+ return ERROR_FAIL;
+ }
+
+ for (int sector = 0; sector < bank->num_sectors; sector++) {
+ sectors[sector].offset = sector * ath79_info->dev->sectorsize;
+ sectors[sector].size = ath79_info->dev->sectorsize;
+ sectors[sector].is_erased = -1;
+ sectors[sector].is_protected = 1;
+ }
+
+ bank->sectors = sectors;
+ ath79_info->probed = 1;
+ return ERROR_OK;
+}
+
+static int ath79_auto_probe(struct flash_bank *bank)
+{
+ struct ath79_flash_bank *ath79_info = bank->driver_priv;
+ if (ath79_info->probed)
+ return ERROR_OK;
+ return ath79_probe(bank);
+}
+
+static int ath79_protect_check(struct flash_bank *bank)
+{
+ /* Nothing to do. Protection is only handled in SW. */
+ return ERROR_OK;
+}
+
+static int get_ath79_info(struct flash_bank *bank, char *buf, int buf_size)
+{
+ struct ath79_flash_bank *ath79_info = bank->driver_priv;
+
+ if (!(ath79_info->probed)) {
+ snprintf(buf, buf_size,
+ "\nSMI flash bank not probed yet\n");
+ return ERROR_OK;
+ }
+
+ snprintf(buf, buf_size, "\nSMI flash information:\n"
+ " Device \'%s\' (ID 0x%08" PRIx32 ")\n",
+ ath79_info->dev->name, ath79_info->dev->device_id);
+
+ return ERROR_OK;
+}
+
+struct flash_driver ath79_flash = {
+ .name = "ath79",
+ .flash_bank_command = ath79_flash_bank_command,
+ .erase = ath79_erase,
+ .protect = ath79_protect,
+ .write = ath79_write,
+ .read = default_flash_read,
+ .probe = ath79_probe,
+ .auto_probe = ath79_auto_probe,
+ .erase_check = default_flash_blank_check,
+ .protect_check = ath79_protect_check,
+ .info = get_ath79_info,
+};
diff -x minidriver_imp.h -x xscale_debug.inc -x startup_tcl.inc -x startup.tcl -x openocd -x Makefile.in -x Makefile -Nru openocd-0.9.0-vanilla/src/flash/nor/drivers.c openocd-0.9.0/src/flash/nor/drivers.c
--- openocd-0.9.0-vanilla/src/flash/nor/drivers.c 2015-04-24 17:09:54.000000000 +0200
+++ openocd-0.9.0/src/flash/nor/drivers.c 2015-10-23 09:15:35.390154487 +0200
@@ -22,6 +22,7 @@
#endif
#include "imp.h"
+extern struct flash_driver ath79_flash;
extern struct flash_driver lpc2000_flash;
extern struct flash_driver lpc288x_flash;
extern struct flash_driver lpc2900_flash;
@@ -65,6 +66,7 @@
* @todo Make this dynamically extendable with loadable modules.
*/
static struct flash_driver *flash_drivers[] = {
+ &ath79_flash,
&lpc2000_flash,
&lpc288x_flash,
&lpc2900_flash,
diff -x minidriver_imp.h -x xscale_debug.inc -x startup_tcl.inc -x startup.tcl -x openocd -x Makefile.in -x Makefile -Nru openocd-0.9.0-vanilla/src/flash/nor/Makefile.am openocd-0.9.0/src/flash/nor/Makefile.am
--- openocd-0.9.0-vanilla/src/flash/nor/Makefile.am 2015-04-24 17:09:54.000000000 +0200
+++ openocd-0.9.0/src/flash/nor/Makefile.am 2015-10-23 09:14:52.291677642 +0200
@@ -29,6 +29,7 @@
pic32mx.c \
spi.c \
stmsmi.c \
+ ath79.c \
stellaris.c \
stm32f1x.c \
stm32f2x.c \
diff -x minidriver_imp.h -x xscale_debug.inc -x startup_tcl.inc -x startup.tcl -x openocd -x Makefile.in -x Makefile -Nru openocd-0.9.0-vanilla/src/flash/nor/spi.c openocd-0.9.0/src/flash/nor/spi.c
--- openocd-0.9.0-vanilla/src/flash/nor/spi.c 2015-04-24 17:09:54.000000000 +0200
+++ openocd-0.9.0/src/flash/nor/spi.c 2015-10-23 10:03:08.459651011 +0200
@@ -74,6 +74,7 @@
FLASH_ID("win w25q32fv", 0xd8, 0xc7, 0x001640ef, 0x100, 0x10000, 0x400000),
FLASH_ID("win w25q32dw", 0xd8, 0xc7, 0x001660ef, 0x100, 0x10000, 0x400000),
FLASH_ID("win w25q64cv", 0xd8, 0xc7, 0x001740ef, 0x100, 0x10000, 0x800000),
+ FLASH_ID("win w25q128", 0xd8, 0xc7, 0x001840ef, 0x100, 0x10000, 0x1000000),
FLASH_ID("gd gd25q20", 0x20, 0xc7, 0x00c84012, 0x100, 0x1000, 0x80000),
FLASH_ID(NULL, 0, 0, 0, 0, 0, 0)
};
