sf: new driver for EON devices
Signed-off-by: Chong Huang <chuang@ucrobotics.com> Signed-off-by: Haitao Zhang <minipanda@linuxrobot.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Chong Huang
Mike Frysinger
parent
97a85b223a
commit
d1d9065647
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@ -27,6 +27,7 @@ LIB := $(obj)libspi_flash.o
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COBJS-$(CONFIG_SPI_FLASH) += spi_flash.o
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COBJS-$(CONFIG_SPI_FLASH_ATMEL) += atmel.o
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COBJS-$(CONFIG_SPI_FLASH_EON) += eon.o
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COBJS-$(CONFIG_SPI_FLASH_MACRONIX) += macronix.o
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COBJS-$(CONFIG_SPI_FLASH_SPANSION) += spansion.o
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COBJS-$(CONFIG_SPI_FLASH_SST) += sst.o
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@ -0,0 +1,275 @@
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/*
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* (C) Copyright 2010, ucRobotics Inc.
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* Author: Chong Huang <chuang@ucrobotics.com>
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* Licensed under the GPL-2 or later.
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*/
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#include <common.h>
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#include <malloc.h>
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#include <spi_flash.h>
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#include "spi_flash_internal.h"
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/* EN25Q128-specific commands */
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#define CMD_EN25Q128_WREN 0x06 /* Write Enable */
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#define CMD_EN25Q128_WRDI 0x04 /* Write Disable */
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#define CMD_EN25Q128_RDSR 0x05 /* Read Status Register */
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#define CMD_EN25Q128_WRSR 0x01 /* Write Status Register */
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#define CMD_EN25Q128_READ 0x03 /* Read Data Bytes */
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#define CMD_EN25Q128_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
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#define CMD_EN25Q128_PP 0x02 /* Page Program */
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#define CMD_EN25Q128_SE 0x20 /* Sector Erase */
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#define CMD_EN25Q128_BE 0xd8 /* Block Erase */
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#define CMD_EN25Q128_DP 0xb9 /* Deep Power-down */
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#define CMD_EN25Q128_RES 0xab /* Release from DP, and Read Signature */
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#define EON_ID_EN25Q128 0x18
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#define EON_SR_WIP (1 << 0) /* Write-in-Progress */
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struct eon_spi_flash_params {
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u8 idcode1;
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u16 page_size;
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u16 pages_per_sector;
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u16 sectors_per_block;
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u16 nr_sectors;
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const char *name;
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};
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/* spi_flash needs to be first so upper layers can free() it */
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struct eon_spi_flash {
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struct spi_flash flash;
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const struct eon_spi_flash_params *params;
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};
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static inline struct eon_spi_flash *to_eon_spi_flash(struct spi_flash *flash)
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{
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return container_of(flash, struct eon_spi_flash, flash);
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}
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static const struct eon_spi_flash_params eon_spi_flash_table[] = {
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{
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.idcode1 = EON_ID_EN25Q128,
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.page_size = 256,
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.pages_per_sector = 16,
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.sectors_per_block = 16,
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.nr_sectors = 4096,
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.name = "EN25Q128",
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},
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};
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static int eon_wait_ready(struct spi_flash *flash, unsigned long timeout)
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{
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struct spi_slave *spi = flash->spi;
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unsigned long timebase;
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int ret;
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u8 cmd = CMD_EN25Q128_RDSR;
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u8 status;
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ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
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if (ret) {
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debug("SF: Failed to send command %02x: %d\n", cmd, ret);
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return ret;
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}
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timebase = get_timer(0);
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do {
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ret = spi_xfer(spi, 8, NULL, &status, 0);
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if (ret)
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return -1;
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if ((status & EON_SR_WIP) == 0)
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break;
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} while (get_timer(timebase) < timeout);
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spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
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if ((status & EON_SR_WIP) == 0)
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return 0;
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/* Timed out */
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return -1;
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}
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static int eon_read_fast(struct spi_flash *flash,
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u32 offset, size_t len, void *buf)
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{
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struct eon_spi_flash *eon = to_eon_spi_flash(flash);
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unsigned long page_addr;
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unsigned long page_size;
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u8 cmd[5];
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page_size = eon->params->page_size;
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page_addr = offset / page_size;
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cmd[0] = CMD_READ_ARRAY_FAST;
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cmd[1] = page_addr >> 8;
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cmd[2] = page_addr;
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cmd[3] = offset % page_size;
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cmd[4] = 0x00;
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return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
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}
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static int eon_write(struct spi_flash *flash,
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u32 offset, size_t len, const void *buf)
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{
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struct eon_spi_flash *eon = to_eon_spi_flash(flash);
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unsigned long page_addr;
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unsigned long byte_addr;
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unsigned long page_size;
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size_t chunk_len;
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size_t actual;
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int ret;
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u8 cmd[4];
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page_size = eon->params->page_size;
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page_addr = offset / page_size;
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byte_addr = offset % page_size;
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ret = spi_claim_bus(flash->spi);
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if (ret) {
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debug("SF: Unable to claim SPI bus\n");
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return ret;
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}
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ret = 0;
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for (actual = 0; actual < len; actual += chunk_len) {
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chunk_len = min(len - actual, page_size - byte_addr);
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cmd[0] = CMD_EN25Q128_PP;
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cmd[1] = page_addr >> 8;
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cmd[2] = page_addr;
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cmd[3] = byte_addr;
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debug
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("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %d\n",
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buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
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ret = spi_flash_cmd(flash->spi, CMD_EN25Q128_WREN, NULL, 0);
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if (ret < 0) {
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debug("SF: Enabling Write failed\n");
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break;
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}
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ret = spi_flash_cmd_write(flash->spi, cmd, 4,
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buf + actual, chunk_len);
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if (ret < 0) {
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debug("SF: EON Page Program failed\n");
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break;
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}
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ret = eon_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
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if (ret < 0) {
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debug("SF: EON page programming timed out\n");
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break;
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}
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page_addr++;
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byte_addr = 0;
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}
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debug("SF: EON: Successfully programmed %u bytes @ 0x%x\n",
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len, offset);
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spi_release_bus(flash->spi);
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return ret;
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}
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int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
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{
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/* block erase */
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struct eon_spi_flash *eon = to_eon_spi_flash(flash);
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unsigned long block_size;
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size_t actual;
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int ret;
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u8 cmd[4];
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block_size = eon->params->page_size * eon->params->pages_per_sector
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* eon->params->sectors_per_block;
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if (offset % block_size || len % block_size) {
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debug("SF: Erase offset/length not multiple of block size\n");
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return -1;
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}
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len /= block_size;
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cmd[0] = CMD_EN25Q128_BE;
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cmd[2] = 0x00;
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cmd[3] = 0x00;
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ret = spi_claim_bus(flash->spi);
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if (ret) {
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debug("SF: Unable to claim SPI bus\n");
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return ret;
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}
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ret = 0;
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for (actual = 0; actual < len; actual++) {
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cmd[1] = (offset / block_size) + actual;
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ret = spi_flash_cmd(flash->spi, CMD_EN25Q128_WREN, NULL, 0);
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if (ret < 0) {
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debug("SF: Enabling Write failed\n");
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break;
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}
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ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0);
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if (ret < 0) {
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debug("SF: EON page erase failed\n");
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break;
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}
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ret = eon_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
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if (ret < 0) {
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debug("SF: EON page erase timed out\n");
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break;
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}
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}
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debug("SF: EON: Successfully erased %u bytes @ 0x%x\n",
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len * block_size, offset);
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spi_release_bus(flash->spi);
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return ret;
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}
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struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
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{
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const struct eon_spi_flash_params *params;
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struct eon_spi_flash *eon;
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(eon_spi_flash_table); ++i) {
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params = &eon_spi_flash_table[i];
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if (params->idcode1 == idcode[2])
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break;
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}
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if (i == ARRAY_SIZE(eon_spi_flash_table)) {
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debug("SF: Unsupported EON ID %02x\n", idcode[1]);
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return NULL;
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}
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eon = malloc(sizeof(*eon));
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if (!eon) {
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debug("SF: Failed to allocate memory\n");
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return NULL;
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}
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eon->params = params;
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eon->flash.spi = spi;
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eon->flash.name = params->name;
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eon->flash.write = eon_write;
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eon->flash.erase = eon_erase;
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eon->flash.read = eon_read_fast;
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eon->flash.size = params->page_size * params->pages_per_sector
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* params->nr_sectors;
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debug("SF: Detected %s with page size %u, total %u bytes\n",
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params->name, params->page_size, eon->flash.size);
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return &eon->flash;
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}
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@ -131,6 +131,9 @@ static const struct {
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#ifdef CONFIG_SPI_FLASH_ATMEL
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{ 0, 0x1f, spi_flash_probe_atmel, },
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#endif
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#ifdef CONFIG_SPI_FLASH_EON
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{ 0, 0x1c, spi_flash_probe_eon, },
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#endif
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#ifdef CONFIG_SPI_FLASH_MACRONIX
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{ 0, 0xc2, spi_flash_probe_macronix, },
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#endif
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@ -46,6 +46,7 @@ int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
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/* Manufacturer-specific probe functions */
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struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode);
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struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode);
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struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode);
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struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode);
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struct spi_flash *spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode);
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struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 *idcode);
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