--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Renesas RCar Gen3 RPC Hyperflash driver
+ * Based on U-Boot RPC Hyperflash driver
+ *
+ * Copyright (C) 2016 Renesas Electronics Corporation
+ * Copyright (C) 2016 Cogent Embedded, Inc.
+ * Copyright (C) 2017-2019 Marek Vasut <marek.vasut@gmail.com>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "imp.h"
+#include "cfi.h"
+#include "non_cfi.h"
+#include <helper/binarybuffer.h>
+#include <helper/bits.h>
+#include <helper/time_support.h>
+
+#define RPC_CMNCR 0x0000 /* R/W */
+#define RPC_CMNCR_MD BIT(31)
+#define RPC_CMNCR_MOIIO0(val) (((val) & 0x3) << 16)
+#define RPC_CMNCR_MOIIO1(val) (((val) & 0x3) << 18)
+#define RPC_CMNCR_MOIIO2(val) (((val) & 0x3) << 20)
+#define RPC_CMNCR_MOIIO3(val) (((val) & 0x3) << 22)
+#define RPC_CMNCR_MOIIO_HIZ (RPC_CMNCR_MOIIO0(3) | RPC_CMNCR_MOIIO1(3) | \
+ RPC_CMNCR_MOIIO2(3) | RPC_CMNCR_MOIIO3(3))
+#define RPC_CMNCR_IO0FV(val) (((val) & 0x3) << 8)
+#define RPC_CMNCR_IO2FV(val) (((val) & 0x3) << 12)
+#define RPC_CMNCR_IO3FV(val) (((val) & 0x3) << 14)
+#define RPC_CMNCR_IOFV_HIZ (RPC_CMNCR_IO0FV(3) | RPC_CMNCR_IO2FV(3) | \
+ RPC_CMNCR_IO3FV(3))
+#define RPC_CMNCR_BSZ(val) (((val) & 0x3) << 0)
+
+#define RPC_SSLDR 0x0004 /* R/W */
+#define RPC_SSLDR_SPNDL(d) (((d) & 0x7) << 16)
+#define RPC_SSLDR_SLNDL(d) (((d) & 0x7) << 8)
+#define RPC_SSLDR_SCKDL(d) (((d) & 0x7) << 0)
+
+#define RPC_DRCR 0x000C /* R/W */
+#define RPC_DRCR_SSLN BIT(24)
+#define RPC_DRCR_RBURST(v) (((v) & 0x1F) << 16)
+#define RPC_DRCR_RCF BIT(9)
+#define RPC_DRCR_RBE BIT(8)
+#define RPC_DRCR_SSLE BIT(0)
+
+#define RPC_DRCMR 0x0010 /* R/W */
+#define RPC_DRCMR_CMD(c) (((c) & 0xFF) << 16)
+#define RPC_DRCMR_OCMD(c) (((c) & 0xFF) << 0)
+
+#define RPC_DREAR 0x0014 /* R/W */
+#define RPC_DREAR_EAV(v) (((v) & 0xFF) << 16)
+#define RPC_DREAR_EAC(v) (((v) & 0x7) << 0)
+
+#define RPC_DROPR 0x0018 /* R/W */
+#define RPC_DROPR_OPD3(o) (((o) & 0xFF) << 24)
+#define RPC_DROPR_OPD2(o) (((o) & 0xFF) << 16)
+#define RPC_DROPR_OPD1(o) (((o) & 0xFF) << 8)
+#define RPC_DROPR_OPD0(o) (((o) & 0xFF) << 0)
+
+#define RPC_DRENR 0x001C /* R/W */
+#define RPC_DRENR_CDB(o) (uint32_t)((((o) & 0x3) << 30))
+#define RPC_DRENR_OCDB(o) (((o) & 0x3) << 28)
+#define RPC_DRENR_ADB(o) (((o) & 0x3) << 24)
+#define RPC_DRENR_OPDB(o) (((o) & 0x3) << 20)
+#define RPC_DRENR_SPIDB(o) (((o) & 0x3) << 16)
+#define RPC_DRENR_DME BIT(15)
+#define RPC_DRENR_CDE BIT(14)
+#define RPC_DRENR_OCDE BIT(12)
+#define RPC_DRENR_ADE(v) (((v) & 0xF) << 8)
+#define RPC_DRENR_OPDE(v) (((v) & 0xF) << 4)
+
+#define RPC_SMCR 0x0020 /* R/W */
+#define RPC_SMCR_SSLKP BIT(8)
+#define RPC_SMCR_SPIRE BIT(2)
+#define RPC_SMCR_SPIWE BIT(1)
+#define RPC_SMCR_SPIE BIT(0)
+
+#define RPC_SMCMR 0x0024 /* R/W */
+#define RPC_SMCMR_CMD(c) (((c) & 0xFF) << 16)
+#define RPC_SMCMR_OCMD(c) (((c) & 0xFF) << 0)
+
+#define RPC_SMADR 0x0028 /* R/W */
+#define RPC_SMOPR 0x002C /* R/W */
+#define RPC_SMOPR_OPD0(o) (((o) & 0xFF) << 0)
+#define RPC_SMOPR_OPD1(o) (((o) & 0xFF) << 8)
+#define RPC_SMOPR_OPD2(o) (((o) & 0xFF) << 16)
+#define RPC_SMOPR_OPD3(o) (((o) & 0xFF) << 24)
+
+#define RPC_SMENR 0x0030 /* R/W */
+#define RPC_SMENR_CDB(o) (((o) & 0x3) << 30)
+#define RPC_SMENR_OCDB(o) (((o) & 0x3) << 28)
+#define RPC_SMENR_ADB(o) (((o) & 0x3) << 24)
+#define RPC_SMENR_OPDB(o) (((o) & 0x3) << 20)
+#define RPC_SMENR_SPIDB(o) (((o) & 0x3) << 16)
+#define RPC_SMENR_DME BIT(15)
+#define RPC_SMENR_CDE BIT(14)
+#define RPC_SMENR_OCDE BIT(12)
+#define RPC_SMENR_ADE(v) (((v) & 0xF) << 8)
+#define RPC_SMENR_OPDE(v) (((v) & 0xF) << 4)
+#define RPC_SMENR_SPIDE(v) (((v) & 0xF) << 0)
+
+#define RPC_SMRDR0 0x0038 /* R */
+#define RPC_SMRDR1 0x003C /* R */
+#define RPC_SMWDR0 0x0040 /* R/W */
+#define RPC_SMWDR1 0x0044 /* R/W */
+#define RPC_CMNSR 0x0048 /* R */
+#define RPC_CMNSR_SSLF BIT(1)
+#define RPC_CMNSR_TEND BIT(0)
+
+#define RPC_DRDMCR 0x0058 /* R/W */
+#define RPC_DRDMCR_DMCYC(v) (((v) & 0xF) << 0)
+
+#define RPC_DRDRENR 0x005C /* R/W */
+#define RPC_DRDRENR_HYPE (0x5 << 12)
+#define RPC_DRDRENR_ADDRE BIT(8)
+#define RPC_DRDRENR_OPDRE BIT(4)
+#define RPC_DRDRENR_DRDRE BIT(0)
+
+#define RPC_SMDMCR 0x0060 /* R/W */
+#define RPC_SMDMCR_DMCYC(v) (((v) & 0xF) << 0)
+
+#define RPC_SMDRENR 0x0064 /* R/W */
+#define RPC_SMDRENR_HYPE (0x5 << 12)
+#define RPC_SMDRENR_ADDRE BIT(8)
+#define RPC_SMDRENR_OPDRE BIT(4)
+#define RPC_SMDRENR_SPIDRE BIT(0)
+
+#define RPC_PHYCNT 0x007C /* R/W */
+#define RPC_PHYCNT_CAL BIT(31)
+#define PRC_PHYCNT_OCTA_AA BIT(22)
+#define PRC_PHYCNT_OCTA_SA BIT(23)
+#define PRC_PHYCNT_EXDS BIT(21)
+#define RPC_PHYCNT_OCT BIT(20)
+#define RPC_PHYCNT_WBUF2 BIT(4)
+#define RPC_PHYCNT_WBUF BIT(2)
+#define RPC_PHYCNT_MEM(v) (((v) & 0x3) << 0)
+
+#define RPC_PHYINT 0x0088 /* R/W */
+#define RPC_PHYINT_RSTEN BIT(18)
+#define RPC_PHYINT_WPEN BIT(17)
+#define RPC_PHYINT_INTEN BIT(16)
+#define RPC_PHYINT_RST BIT(2)
+#define RPC_PHYINT_WP BIT(1)
+#define RPC_PHYINT_INT BIT(0)
+
+#define RPC_WBUF 0x8000 /* R/W size=4/8/16/32/64Bytes */
+#define RPC_WBUF_SIZE 0x100
+
+static uint32_t rpc_base = 0xee200000;
+static uint32_t mem_base = 0x08000000;
+
+enum rpc_hf_size {
+ RPC_HF_SIZE_16BIT = RPC_SMENR_SPIDE(0x8),
+ RPC_HF_SIZE_32BIT = RPC_SMENR_SPIDE(0xC),
+ RPC_HF_SIZE_64BIT = RPC_SMENR_SPIDE(0xF),
+};
+
+static int rpc_hf_wait_tend(struct target *target)
+{
+ uint32_t reg = rpc_base + RPC_CMNSR;
+ uint32_t val;
+ unsigned long timeout = 1000;
+ long long endtime;
+ int ret;
+
+ endtime = timeval_ms() + timeout;
+ do {
+ ret = target_read_u32(target, reg, &val);
+ if (ret != ERROR_OK)
+ return ERROR_FAIL;
+
+ if (val & RPC_CMNSR_TEND)
+ return ERROR_OK;
+
+ alive_sleep(1);
+ } while (timeval_ms() < endtime);
+
+ LOG_ERROR("timeout");
+ return ERROR_TIMEOUT_REACHED;
+}
+
+static int clrsetbits_u32(struct target *target, uint32_t reg,
+ uint32_t clr, uint32_t set)
+{
+ uint32_t val;
+ int ret;
+
+ ret = target_read_u32(target, reg, &val);
+ if (ret != ERROR_OK)
+ return ret;
+
+ val &= ~clr;
+ val |= set;
+
+ return target_write_u32(target, reg, val);
+}
+
+static int rpc_hf_mode(struct target *target, bool manual)
+{
+ uint32_t val;
+ int ret;
+
+ ret = rpc_hf_wait_tend(target);
+ if (ret != ERROR_OK) {
+ LOG_ERROR("Mode TEND timeout");
+ return ret;
+ }
+
+ ret = clrsetbits_u32(target, rpc_base + RPC_PHYCNT,
+ RPC_PHYCNT_WBUF | RPC_PHYCNT_WBUF2 |
+ RPC_PHYCNT_CAL | RPC_PHYCNT_MEM(3),
+ RPC_PHYCNT_CAL | RPC_PHYCNT_MEM(3));
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = clrsetbits_u32(target, rpc_base + RPC_CMNCR,
+ RPC_CMNCR_MD | RPC_CMNCR_BSZ(3),
+ RPC_CMNCR_MOIIO_HIZ | RPC_CMNCR_IOFV_HIZ |
+ (manual ? RPC_CMNCR_MD : 0) | RPC_CMNCR_BSZ(1));
+ if (ret != ERROR_OK)
+ return ret;
+
+ if (manual)
+ return ERROR_OK;
+
+ ret = target_write_u32(target, rpc_base + RPC_DRCR,
+ RPC_DRCR_RBURST(0x1F) | RPC_DRCR_RCF |
+ RPC_DRCR_RBE);
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = target_write_u32(target, rpc_base + RPC_DRCMR,
+ RPC_DRCMR_CMD(0xA0));
+ if (ret != ERROR_OK)
+ return ret;
+ ret = target_write_u32(target, rpc_base + RPC_DRENR,
+ RPC_DRENR_CDB(2) | RPC_DRENR_OCDB(2) |
+ RPC_DRENR_ADB(2) | RPC_DRENR_SPIDB(2) |
+ RPC_DRENR_CDE | RPC_DRENR_OCDE |
+ RPC_DRENR_ADE(4));
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = target_write_u32(target, rpc_base + RPC_DRDMCR,
+ RPC_DRDMCR_DMCYC(0xE));
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = target_write_u32(target, rpc_base + RPC_DRDRENR,
+ RPC_DRDRENR_HYPE | RPC_DRDRENR_ADDRE |
+ RPC_DRDRENR_DRDRE);
+ if (ret != ERROR_OK)
+ return ret;
+
+ /* Dummy read */
+ return target_read_u32(target, rpc_base + RPC_DRCR, &val);
+}
+
+static int rpc_hf_xfer(struct target *target, target_addr_t addr,
+ uint32_t wdata, uint32_t *rdata, enum rpc_hf_size size,
+ bool write, const uint8_t *wbuf, unsigned int wbuf_size)
+{
+ int ret;
+ uint32_t val;
+
+ if (wbuf_size != 0) {
+ ret = rpc_hf_wait_tend(target);
+ if (ret != ERROR_OK) {
+ LOG_ERROR("Xfer TEND timeout");
+ return ret;
+ }
+
+ /* Write calibration magic */
+ ret = target_write_u32(target, rpc_base + RPC_DRCR, 0x01FF0301);
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = target_write_u32(target, rpc_base + RPC_PHYCNT, 0x80030277);
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = target_write_memory(target, rpc_base | RPC_WBUF, 4,
+ wbuf_size / 4, wbuf);
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = clrsetbits_u32(target, rpc_base + RPC_CMNCR,
+ RPC_CMNCR_MD | RPC_CMNCR_BSZ(3),
+ RPC_CMNCR_MOIIO_HIZ | RPC_CMNCR_IOFV_HIZ |
+ RPC_CMNCR_MD | RPC_CMNCR_BSZ(1));
+ if (ret != ERROR_OK)
+ return ret;
+ } else {
+ ret = rpc_hf_mode(target, 1);
+ if (ret != ERROR_OK)
+ return ret;
+ }
+
+ /* Submit HF address, SMCMR CMD[7] ~= CA Bit# 47 (R/nW) */
+ ret = target_write_u32(target, rpc_base + RPC_SMCMR,
+ write ? 0 : RPC_SMCMR_CMD(0x80));
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = target_write_u32(target, rpc_base + RPC_SMADR,
+ addr >> 1);
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = target_write_u32(target, rpc_base + RPC_SMOPR, 0x0);
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = target_write_u32(target, rpc_base + RPC_SMDRENR,
+ RPC_SMDRENR_HYPE | RPC_SMDRENR_ADDRE |
+ RPC_SMDRENR_SPIDRE);
+ if (ret != ERROR_OK)
+ return ret;
+
+ val = RPC_SMENR_CDB(2) | RPC_SMENR_OCDB(2) |
+ RPC_SMENR_ADB(2) | RPC_SMENR_SPIDB(2) |
+ (wbuf_size ? RPC_SMENR_OPDB(2) : 0) |
+ RPC_SMENR_CDE | RPC_SMENR_OCDE | RPC_SMENR_ADE(4) | size;
+
+ if (write) {
+ ret = target_write_u32(target, rpc_base + RPC_SMENR, val);
+ if (ret != ERROR_OK)
+ return ret;
+
+ if (wbuf_size == 0) {
+ buf_bswap32((uint8_t *)&wdata, (uint8_t *)&wdata, 4);
+ ret = target_write_u32(target, rpc_base + RPC_SMWDR0,
+ wdata);
+ if (ret != ERROR_OK)
+ return ret;
+ }
+
+ ret = target_write_u32(target, rpc_base + RPC_SMCR,
+ RPC_SMCR_SPIWE | RPC_SMCR_SPIE);
+ if (ret != ERROR_OK)
+ return ret;
+ } else {
+ val |= RPC_SMENR_DME;
+
+ ret = target_write_u32(target, rpc_base + RPC_SMDMCR,
+ RPC_SMDMCR_DMCYC(0xE));
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = target_write_u32(target, rpc_base + RPC_SMENR, val);
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = target_write_u32(target, rpc_base + RPC_SMCR,
+ RPC_SMCR_SPIRE | RPC_SMCR_SPIE);
+ if (ret != ERROR_OK)
+ return ret;
+
+ ret = rpc_hf_wait_tend(target);
+ if (ret != ERROR_OK)
+ return ret;
+
+ uint32_t val32;
+ ret = target_read_u32(target, rpc_base + RPC_SMRDR0, &val32);
+ if (ret != ERROR_OK)
+ return ret;
+ buf_bswap32((uint8_t *)&val32, (uint8_t *)&val32, 4);
+ *rdata = val32;
+ }
+
+ ret = rpc_hf_mode(target, 0);
+ if (ret != ERROR_OK)
+ LOG_ERROR("Xfer done TEND timeout");
+ return ret;
+}
+
+static int rpchf_target_write_memory(struct flash_bank *bank, target_addr_t addr,
+ uint32_t count, const uint8_t *buffer)
+{
+ struct target *target = bank->target;
+ uint32_t wdata;
+
+ if (count != 2)
+ return ERROR_FAIL;
+
+ wdata = buffer[0] | (buffer[1] << 8);
+
+ return rpc_hf_xfer(target, addr, wdata, NULL, RPC_HF_SIZE_16BIT,
+ true, NULL, 0);
+}
+
+static int rpchf_target_read_memory(struct flash_bank *bank, target_addr_t addr,
+ uint32_t count, uint8_t *buffer)
+{
+ struct target *target = bank->target;
+ uint32_t i, rdata;
+ int ret;
+
+ for (i = 0; i < count; i++) {
+ ret = rpc_hf_xfer(target, addr + (2 * i), 0, &rdata,
+ RPC_HF_SIZE_16BIT, false, NULL, 0);
+ if (ret != ERROR_OK)
+ return ret;
+ buffer[(2 * i) + 0] = rdata & 0xff;
+ buffer[(2 * i) + 1] = (rdata >> 8) & 0xff;
+ }
+
+ return ERROR_OK;
+}
+
+FLASH_BANK_COMMAND_HANDLER(rpchf_flash_bank_command)
+{
+ struct cfi_flash_bank *cfi_info;
+ int ret;
+
+ ret = cfi_flash_bank_cmd(bank, CMD_ARGC, CMD_ARGV);
+ if (ret != ERROR_OK)
+ return ret;
+
+ cfi_info = bank->driver_priv;
+ cfi_info->read_mem = rpchf_target_read_memory;
+ cfi_info->write_mem = rpchf_target_write_memory;
+
+ return ERROR_OK;
+}
+
+static int rpchf_spansion_write_words(struct flash_bank *bank, const uint8_t *word,
+ uint32_t wordcount, uint32_t address)
+{
+ int retval;
+ struct cfi_flash_bank *cfi_info = bank->driver_priv;
+ struct cfi_spansion_pri_ext *pri_ext = cfi_info->pri_ext;
+
+ /* Calculate buffer size and boundary mask
+ * buffersize is (buffer size per chip) * (number of chips)
+ * bufferwsize is buffersize in words */
+ uint32_t buffersize = RPC_WBUF_SIZE;
+ uint32_t buffermask = buffersize - 1;
+ uint32_t bufferwsize = buffersize / 2;
+
+ /* Check for valid range */
+ if (address & buffermask) {
+ LOG_ERROR("Write address at base " TARGET_ADDR_FMT
+ ", address 0x%" PRIx32 " not aligned to 2^%d boundary",
+ bank->base, address, cfi_info->max_buf_write_size);
+ return ERROR_FLASH_OPERATION_FAILED;
+ }
+
+ /* Check for valid size */
+ if (wordcount > bufferwsize) {
+ LOG_ERROR("Number of data words %" PRId32 " exceeds available buffersize %"
+ PRId32, wordcount, buffersize);
+ return ERROR_FLASH_OPERATION_FAILED;
+ }
+
+ /* Unlock */
+ retval = cfi_spansion_unlock_seq(bank);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = cfi_send_command(bank, 0xa0, cfi_flash_address(bank, 0, pri_ext->_unlock1));
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = rpc_hf_xfer(bank->target, address, 0, NULL, RPC_HF_SIZE_64BIT, true, word, wordcount * 2);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (cfi_spansion_wait_status_busy(bank, cfi_info->word_write_timeout) != ERROR_OK) {
+ retval = cfi_send_command(bank, 0xf0, cfi_flash_address(bank, 0, 0x0));
+ if (retval != ERROR_OK)
+ return retval;
+
+ LOG_ERROR("couldn't write block at base " TARGET_ADDR_FMT
+ ", address 0x%" PRIx32 ", size 0x%" PRIx32, bank->base, address,
+ bufferwsize);
+ return ERROR_FLASH_OPERATION_FAILED;
+ }
+
+ return ERROR_OK;
+}
+
+static int rpchf_write_words(struct flash_bank *bank, const uint8_t *word,
+ uint32_t wordcount, uint32_t address)
+{
+ return rpchf_spansion_write_words(bank, word, wordcount, address);
+}
+
+static int rpchf_write(struct flash_bank *bank, const uint8_t *buffer, uint32_t offset, uint32_t count)
+{
+ struct cfi_flash_bank *cfi_info = bank->driver_priv;
+ uint32_t address = bank->base + offset; /* address of first byte to be programmed */
+ uint32_t write_p;
+ int align; /* number of unaligned bytes */
+ uint8_t current_word[CFI_MAX_BUS_WIDTH * 4]; /* word (bus_width size) currently being
+ *programmed */
+ int i;
+ int retval;
+
+ if (bank->target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (offset + count > bank->size)
+ return ERROR_FLASH_DST_OUT_OF_BANK;
+
+ if (cfi_info->qry[0] != 'Q')
+ return ERROR_FLASH_BANK_NOT_PROBED;
+
+ /* start at the first byte of the first word (bus_width size) */
+ write_p = address & ~(bank->bus_width - 1);
+ align = address - write_p;
+ if (align != 0) {
+ LOG_INFO("Fixup %d unaligned head bytes", align);
+
+ /* read a complete word from flash */
+ retval = cfi_target_read_memory(bank, write_p, 1, current_word);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* replace only bytes that must be written */
+ for (i = align;
+ (i < bank->bus_width) && (count > 0);
+ i++, count--)
+ if (cfi_info->data_swap)
+ /* data bytes are swapped (reverse endianness) */
+ current_word[bank->bus_width - i] = *buffer++;
+ else
+ current_word[i] = *buffer++;
+
+ retval = cfi_write_word(bank, current_word, write_p);
+ if (retval != ERROR_OK)
+ return retval;
+ write_p += bank->bus_width;
+ }
+
+ /* Calculate buffer size and boundary mask
+ * buffersize is (buffer size per chip) * (number of chips)
+ * bufferwsize is buffersize in words */
+ uint32_t buffersize = RPC_WBUF_SIZE;
+ uint32_t buffermask = buffersize-1;
+ uint32_t bufferwsize = buffersize / bank->bus_width;
+
+ /* fall back to memory writes */
+ while (count >= (uint32_t)bank->bus_width) {
+ int fallback;
+ if ((write_p & 0xff) == 0) {
+ LOG_INFO("Programming at 0x%08" PRIx32 ", count 0x%08"
+ PRIx32 " bytes remaining", write_p, count);
+ }
+ fallback = 1;
+ if ((bufferwsize > 0) && (count >= buffersize) &&
+ !(write_p & buffermask)) {
+ retval = rpchf_write_words(bank, buffer, bufferwsize, write_p);
+ if (retval == ERROR_OK) {
+ buffer += buffersize;
+ write_p += buffersize;
+ count -= buffersize;
+ fallback = 0;
+ } else if (retval != ERROR_FLASH_OPER_UNSUPPORTED)
+ return retval;
+ }
+ /* try the slow way? */
+ if (fallback) {
+ for (i = 0; i < bank->bus_width; i++)
+ current_word[i] = *buffer++;
+
+ retval = cfi_write_word(bank, current_word, write_p);
+ if (retval != ERROR_OK)
+ return retval;
+
+ write_p += bank->bus_width;
+ count -= bank->bus_width;
+ }
+ }
+
+ /* return to read array mode, so we can read from flash again for padding */
+ retval = cfi_reset(bank);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* handle unaligned tail bytes */
+ if (count > 0) {
+ LOG_INFO("Fixup %" PRId32 " unaligned tail bytes", count);
+
+ /* read a complete word from flash */
+ retval = cfi_target_read_memory(bank, write_p, 1, current_word);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* replace only bytes that must be written */
+ for (i = 0; (i < bank->bus_width) && (count > 0); i++, count--)
+ if (cfi_info->data_swap)
+ /* data bytes are swapped (reverse endianness) */
+ current_word[bank->bus_width - i] = *buffer++;
+ else
+ current_word[i] = *buffer++;
+
+ retval = cfi_write_word(bank, current_word, write_p);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ /* return to read array mode */
+ return cfi_reset(bank);
+}
+
+static int rpchf_read(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
+{
+ struct cfi_flash_bank *cfi_info = bank->driver_priv;
+ struct target *target = bank->target;
+
+ LOG_DEBUG("reading buffer of %" PRIi32 " byte at 0x%8.8" PRIx32,
+ count, offset);
+
+ if (bank->target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ if (offset + count > bank->size)
+ return ERROR_FLASH_DST_OUT_OF_BANK;
+
+ if (cfi_info->qry[0] != 'Q')
+ return ERROR_FLASH_BANK_NOT_PROBED;
+
+ return target_read_memory(target, offset | mem_base,
+ 4, count / 4, buffer);
+}
+
+const struct flash_driver renesas_rpchf_flash = {
+ .name = "rpchf",
+ .flash_bank_command = rpchf_flash_bank_command,
+ .erase = cfi_erase,
+ .protect = cfi_protect,
+ .write = rpchf_write,
+ .read = rpchf_read,
+ .probe = cfi_probe,
+ .auto_probe = cfi_auto_probe,
+ .erase_check = default_flash_blank_check,
+ .protect_check = cfi_protect_check,
+ .info = cfi_get_info,
+ .free_driver_priv = default_flash_free_driver_priv,
+};
projects / fw / openocd / commitdiff