2008-05-16 18:10:33 +09:00
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/*
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* SPI flash interface
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*
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* Copyright (C) 2008 Atmel Corporation
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2010-10-05 23:56:39 +09:00
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* Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
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*
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2009-10-10 06:12:44 +09:00
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* Licensed under the GPL-2 or later.
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2008-05-16 18:10:33 +09:00
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*/
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2009-03-24 12:03:58 +09:00
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2008-05-16 18:10:33 +09:00
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#include <common.h>
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2013-03-11 15:08:08 +09:00
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#include <fdtdec.h>
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2008-05-16 18:10:33 +09:00
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#include <malloc.h>
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#include <spi.h>
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#include <spi_flash.h>
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2011-04-15 23:25:25 +09:00
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#include <watchdog.h>
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2008-05-16 18:10:33 +09:00
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#include "spi_flash_internal.h"
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2013-03-11 15:08:08 +09:00
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DECLARE_GLOBAL_DATA_PTR;
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2011-01-10 16:20:13 +09:00
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static void spi_flash_addr(u32 addr, u8 *cmd)
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{
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/* cmd[0] is actual command */
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cmd[1] = addr >> 16;
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cmd[2] = addr >> 8;
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cmd[3] = addr >> 0;
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}
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2011-01-10 16:20:11 +09:00
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static int spi_flash_read_write(struct spi_slave *spi,
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const u8 *cmd, size_t cmd_len,
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const u8 *data_out, u8 *data_in,
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size_t data_len)
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2008-05-16 18:10:33 +09:00
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{
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unsigned long flags = SPI_XFER_BEGIN;
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int ret;
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if (data_len == 0)
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flags |= SPI_XFER_END;
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ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
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if (ret) {
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2011-01-10 16:20:11 +09:00
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debug("SF: Failed to send command (%zu bytes): %d\n",
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2008-05-16 18:10:33 +09:00
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cmd_len, ret);
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} else if (data_len != 0) {
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2011-01-10 16:20:11 +09:00
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ret = spi_xfer(spi, data_len * 8, data_out, data_in, SPI_XFER_END);
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2008-05-16 18:10:33 +09:00
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if (ret)
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2011-01-10 16:20:11 +09:00
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debug("SF: Failed to transfer %zu bytes of data: %d\n",
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2008-05-16 18:10:33 +09:00
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data_len, ret);
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}
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return ret;
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}
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2011-01-10 16:20:11 +09:00
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int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
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2008-05-16 18:10:33 +09:00
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{
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2011-01-10 16:20:11 +09:00
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return spi_flash_cmd_read(spi, &cmd, 1, response, len);
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}
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2008-05-16 18:10:33 +09:00
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2011-01-10 16:20:11 +09:00
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int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
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size_t cmd_len, void *data, size_t data_len)
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{
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return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len);
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2008-05-16 18:10:33 +09:00
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}
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2011-01-10 16:20:11 +09:00
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int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
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const void *data, size_t data_len)
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{
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return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
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}
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2008-05-16 18:10:33 +09:00
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2011-04-25 15:58:29 +09:00
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int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
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size_t len, const void *buf)
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{
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unsigned long page_addr, byte_addr, page_size;
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size_t chunk_len, actual;
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int ret;
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u8 cmd[4];
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page_size = flash->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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cmd[0] = CMD_PAGE_PROGRAM;
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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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2013-03-11 15:08:06 +09:00
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if (flash->spi->max_write_size)
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chunk_len = min(chunk_len, flash->spi->max_write_size);
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2011-04-25 15:58:29 +09:00
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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("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\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_write_enable(flash);
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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: write failed\n");
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break;
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}
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ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
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if (ret)
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break;
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2013-03-11 15:08:06 +09:00
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byte_addr += chunk_len;
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if (byte_addr == page_size) {
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page_addr++;
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byte_addr = 0;
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}
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2011-04-25 15:58:29 +09:00
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}
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debug("SF: program %s %zu bytes @ %#x\n",
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ret ? "failure" : "success", 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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2008-05-16 18:10:33 +09:00
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int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
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size_t cmd_len, void *data, size_t data_len)
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{
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struct spi_slave *spi = flash->spi;
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int ret;
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spi_claim_bus(spi);
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ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len);
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spi_release_bus(spi);
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return ret;
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}
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2011-01-10 16:20:14 +09:00
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int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
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size_t len, void *data)
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{
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u8 cmd[5];
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2013-03-11 15:08:08 +09:00
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/* Handle memory-mapped SPI */
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if (flash->memory_map)
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memcpy(data, flash->memory_map + offset, len);
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2011-01-10 16:20:14 +09:00
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cmd[0] = CMD_READ_ARRAY_FAST;
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spi_flash_addr(offset, cmd);
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cmd[4] = 0x00;
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return spi_flash_read_common(flash, cmd, sizeof(cmd), data, len);
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}
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2011-01-10 16:20:12 +09:00
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int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
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u8 cmd, u8 poll_bit)
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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 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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2011-04-15 23:25:25 +09:00
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WATCHDOG_RESET();
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2011-01-10 16:20:12 +09:00
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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 & poll_bit) == 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 & poll_bit) == 0)
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return 0;
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/* Timed out */
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debug("SF: time out!\n");
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return -1;
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}
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int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
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{
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return spi_flash_cmd_poll_bit(flash, timeout,
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CMD_READ_STATUS, STATUS_WIP);
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}
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2012-03-05 12:35:50 +09:00
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int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
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2011-01-10 16:20:13 +09:00
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{
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2011-02-17 06:37:22 +09:00
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u32 start, end, erase_size;
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2011-01-10 16:20:13 +09:00
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int ret;
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u8 cmd[4];
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2011-02-17 06:37:22 +09:00
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erase_size = flash->sector_size;
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2011-01-10 16:20:13 +09:00
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if (offset % erase_size || len % erase_size) {
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debug("SF: Erase offset/length not multiple of erase size\n");
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return -1;
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}
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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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2012-03-05 12:35:50 +09:00
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if (erase_size == 4096)
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cmd[0] = CMD_ERASE_4K;
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else
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cmd[0] = CMD_ERASE_64K;
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2011-01-10 16:20:13 +09:00
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start = offset;
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end = start + len;
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while (offset < end) {
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spi_flash_addr(offset, cmd);
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offset += erase_size;
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debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
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cmd[2], cmd[3], offset);
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2011-04-24 08:05:55 +09:00
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ret = spi_flash_cmd_write_enable(flash);
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2011-01-10 16:20:13 +09:00
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if (ret)
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goto out;
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ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0);
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if (ret)
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goto out;
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ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
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if (ret)
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goto out;
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}
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2011-10-12 20:28:38 +09:00
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debug("SF: Successfully erased %zu bytes @ %#x\n", len, start);
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2011-01-10 16:20:13 +09:00
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out:
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spi_release_bus(flash->spi);
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return ret;
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}
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2012-03-05 13:18:17 +09:00
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int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
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{
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u8 cmd;
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int ret;
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ret = spi_flash_cmd_write_enable(flash);
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if (ret < 0) {
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debug("SF: enabling write failed\n");
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return ret;
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}
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cmd = CMD_WRITE_STATUS;
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ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &sr, 1);
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if (ret) {
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debug("SF: fail to write status register\n");
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return ret;
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}
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ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
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if (ret < 0) {
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debug("SF: write status register timed out\n");
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return ret;
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}
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return 0;
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}
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2013-03-11 15:08:08 +09:00
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#ifdef CONFIG_OF_CONTROL
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int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
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{
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fdt_addr_t addr;
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fdt_size_t size;
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int node;
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/* If there is no node, do nothing */
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node = fdtdec_next_compatible(blob, 0, COMPAT_GENERIC_SPI_FLASH);
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if (node < 0)
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return 0;
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addr = fdtdec_get_addr_size(blob, node, "memory-map", &size);
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if (addr == FDT_ADDR_T_NONE) {
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debug("%s: Cannot decode address\n", __func__);
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return 0;
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}
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if (flash->size != size) {
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debug("%s: Memory map must cover entire device\n", __func__);
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return -1;
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}
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flash->memory_map = (void *)addr;
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return 0;
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}
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#endif /* CONFIG_OF_CONTROL */
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2010-10-05 23:56:39 +09:00
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/*
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* The following table holds all device probe functions
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*
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* shift: number of continuation bytes before the ID
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* idcode: the expected IDCODE or 0xff for non JEDEC devices
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* probe: the function to call
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*
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* Non JEDEC devices should be ordered in the table such that
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* the probe functions with best detection algorithms come first.
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*
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* Several matching entries are permitted, they will be tried
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* in sequence until a probe function returns non NULL.
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*
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* IDCODE_CONT_LEN may be redefined if a device needs to declare a
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* larger "shift" value. IDCODE_PART_LEN generally shouldn't be
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* changed. This is the max number of bytes probe functions may
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* examine when looking up part-specific identification info.
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*
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* Probe functions will be given the idcode buffer starting at their
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* manu id byte (the "idcode" in the table below). In other words,
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* all of the continuation bytes will be skipped (the "shift" below).
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*/
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#define IDCODE_CONT_LEN 0
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#define IDCODE_PART_LEN 5
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static const struct {
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const u8 shift;
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const u8 idcode;
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struct spi_flash *(*probe) (struct spi_slave *spi, u8 *idcode);
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} flashes[] = {
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/* Keep it sorted by define name */
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#ifdef CONFIG_SPI_FLASH_ATMEL
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|
|
{ 0, 0x1f, spi_flash_probe_atmel, },
|
|
|
|
#endif
|
2010-11-30 17:33:25 +09:00
|
|
|
#ifdef CONFIG_SPI_FLASH_EON
|
|
|
|
{ 0, 0x1c, spi_flash_probe_eon, },
|
|
|
|
#endif
|
2010-10-05 23:56:39 +09:00
|
|
|
#ifdef CONFIG_SPI_FLASH_MACRONIX
|
|
|
|
{ 0, 0xc2, spi_flash_probe_macronix, },
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_SPI_FLASH_SPANSION
|
|
|
|
{ 0, 0x01, spi_flash_probe_spansion, },
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_SPI_FLASH_SST
|
|
|
|
{ 0, 0xbf, spi_flash_probe_sst, },
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_SPI_FLASH_STMICRO
|
|
|
|
{ 0, 0x20, spi_flash_probe_stmicro, },
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_SPI_FLASH_WINBOND
|
|
|
|
{ 0, 0xef, spi_flash_probe_winbond, },
|
2010-10-05 23:56:40 +09:00
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_SPI_FRAM_RAMTRON
|
|
|
|
{ 6, 0xc2, spi_fram_probe_ramtron, },
|
|
|
|
# undef IDCODE_CONT_LEN
|
|
|
|
# define IDCODE_CONT_LEN 6
|
2010-10-05 23:56:39 +09:00
|
|
|
#endif
|
|
|
|
/* Keep it sorted by best detection */
|
|
|
|
#ifdef CONFIG_SPI_FLASH_STMICRO
|
|
|
|
{ 0, 0xff, spi_flash_probe_stmicro, },
|
|
|
|
#endif
|
2010-10-05 23:56:40 +09:00
|
|
|
#ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC
|
|
|
|
{ 0, 0xff, spi_fram_probe_ramtron, },
|
|
|
|
#endif
|
2010-10-05 23:56:39 +09:00
|
|
|
};
|
|
|
|
#define IDCODE_LEN (IDCODE_CONT_LEN + IDCODE_PART_LEN)
|
|
|
|
|
2008-05-16 18:10:33 +09:00
|
|
|
struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
|
|
|
|
unsigned int max_hz, unsigned int spi_mode)
|
|
|
|
{
|
|
|
|
struct spi_slave *spi;
|
2010-10-05 23:56:39 +09:00
|
|
|
struct spi_flash *flash = NULL;
|
|
|
|
int ret, i, shift;
|
|
|
|
u8 idcode[IDCODE_LEN], *idp;
|
2008-05-16 18:10:33 +09:00
|
|
|
|
|
|
|
spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
|
|
|
|
if (!spi) {
|
2010-04-29 13:35:12 +09:00
|
|
|
printf("SF: Failed to set up slave\n");
|
2008-05-16 18:10:33 +09:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = spi_claim_bus(spi);
|
|
|
|
if (ret) {
|
|
|
|
debug("SF: Failed to claim SPI bus: %d\n", ret);
|
|
|
|
goto err_claim_bus;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Read the ID codes */
|
2010-10-05 23:56:39 +09:00
|
|
|
ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
|
2008-05-16 18:10:33 +09:00
|
|
|
if (ret)
|
|
|
|
goto err_read_id;
|
|
|
|
|
2010-10-05 23:56:39 +09:00
|
|
|
#ifdef DEBUG
|
|
|
|
printf("SF: Got idcodes\n");
|
|
|
|
print_buffer(0, idcode, 1, sizeof(idcode), 0);
|
2008-05-16 18:10:33 +09:00
|
|
|
#endif
|
|
|
|
|
2010-10-05 23:56:39 +09:00
|
|
|
/* count the number of continuation bytes */
|
|
|
|
for (shift = 0, idp = idcode;
|
|
|
|
shift < IDCODE_CONT_LEN && *idp == 0x7f;
|
|
|
|
++shift, ++idp)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* search the table for matches in shift and id */
|
|
|
|
for (i = 0; i < ARRAY_SIZE(flashes); ++i)
|
|
|
|
if (flashes[i].shift == shift && flashes[i].idcode == *idp) {
|
|
|
|
/* we have a match, call probe */
|
|
|
|
flash = flashes[i].probe(spi, idp);
|
|
|
|
if (flash)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!flash) {
|
|
|
|
printf("SF: Unsupported manufacturer %02x\n", *idp);
|
2008-05-16 18:10:33 +09:00
|
|
|
goto err_manufacturer_probe;
|
2010-10-05 23:56:39 +09:00
|
|
|
}
|
2008-05-16 18:10:33 +09:00
|
|
|
|
2013-03-11 15:08:08 +09:00
|
|
|
#ifdef CONFIG_OF_CONTROL
|
|
|
|
if (spi_flash_decode_fdt(gd->fdt_blob, flash)) {
|
|
|
|
debug("SF: FDT decode error\n");
|
|
|
|
goto err_manufacturer_probe;
|
|
|
|
}
|
|
|
|
#endif
|
2011-04-12 15:09:28 +09:00
|
|
|
printf("SF: Detected %s with page size ", flash->name);
|
|
|
|
print_size(flash->sector_size, ", total ");
|
2013-03-11 15:08:08 +09:00
|
|
|
print_size(flash->size, "");
|
|
|
|
if (flash->memory_map)
|
|
|
|
printf(", mapped at %p", flash->memory_map);
|
|
|
|
puts("\n");
|
2011-02-17 06:37:22 +09:00
|
|
|
|
2008-05-16 18:10:33 +09:00
|
|
|
spi_release_bus(spi);
|
|
|
|
|
|
|
|
return flash;
|
|
|
|
|
|
|
|
err_manufacturer_probe:
|
|
|
|
err_read_id:
|
|
|
|
spi_release_bus(spi);
|
|
|
|
err_claim_bus:
|
|
|
|
spi_free_slave(spi);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2013-03-11 15:08:02 +09:00
|
|
|
void *spi_flash_do_alloc(int offset, int size, struct spi_slave *spi,
|
|
|
|
const char *name)
|
|
|
|
{
|
|
|
|
struct spi_flash *flash;
|
|
|
|
void *ptr;
|
|
|
|
|
|
|
|
ptr = malloc(size);
|
|
|
|
if (!ptr) {
|
|
|
|
debug("SF: Failed to allocate memory\n");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
memset(ptr, '\0', size);
|
|
|
|
flash = (struct spi_flash *)(ptr + offset);
|
|
|
|
|
|
|
|
/* Set up some basic fields - caller will sort out sizes */
|
|
|
|
flash->spi = spi;
|
|
|
|
flash->name = name;
|
|
|
|
|
|
|
|
flash->read = spi_flash_cmd_read_fast;
|
|
|
|
flash->write = spi_flash_cmd_write_multi;
|
|
|
|
flash->erase = spi_flash_cmd_erase;
|
|
|
|
|
|
|
|
return flash;
|
|
|
|
}
|
|
|
|
|
2008-05-16 18:10:33 +09:00
|
|
|
void spi_flash_free(struct spi_flash *flash)
|
|
|
|
{
|
|
|
|
spi_free_slave(flash->spi);
|
|
|
|
free(flash);
|
|
|
|
}
|