upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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373 lines
8.7 KiB
373 lines
8.7 KiB
/*
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* (C) Copyright 2000-2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Copyright 2008, Network Appliance Inc.
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* Jason McMullan <mcmullan@netapp.com>
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*
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* Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
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* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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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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/* M25Pxx-specific commands */
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#define CMD_M25PXX_WREN 0x06 /* Write Enable */
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#define CMD_M25PXX_WRDI 0x04 /* Write Disable */
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#define CMD_M25PXX_RDSR 0x05 /* Read Status Register */
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#define CMD_M25PXX_WRSR 0x01 /* Write Status Register */
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#define CMD_M25PXX_READ 0x03 /* Read Data Bytes */
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#define CMD_M25PXX_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
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#define CMD_M25PXX_PP 0x02 /* Page Program */
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#define CMD_M25PXX_SE 0xd8 /* Sector Erase */
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#define CMD_M25PXX_BE 0xc7 /* Bulk Erase */
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#define CMD_M25PXX_DP 0xb9 /* Deep Power-down */
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#define CMD_M25PXX_RES 0xab /* Release from DP, and Read Signature */
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#define STM_ID_M25P10 0x11
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#define STM_ID_M25P16 0x15
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#define STM_ID_M25P20 0x12
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#define STM_ID_M25P32 0x16
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#define STM_ID_M25P40 0x13
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#define STM_ID_M25P64 0x17
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#define STM_ID_M25P80 0x14
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#define STM_ID_M25P128 0x18
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#define STMICRO_SR_WIP (1 << 0) /* Write-in-Progress */
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struct stmicro_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 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 stmicro_spi_flash {
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struct spi_flash flash;
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const struct stmicro_spi_flash_params *params;
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};
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static inline struct stmicro_spi_flash *to_stmicro_spi_flash(struct spi_flash
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*flash)
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{
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return container_of(flash, struct stmicro_spi_flash, flash);
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}
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static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
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{
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.idcode1 = STM_ID_M25P10,
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.page_size = 256,
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.pages_per_sector = 128,
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.nr_sectors = 4,
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.name = "M25P10",
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},
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{
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.idcode1 = STM_ID_M25P16,
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.page_size = 256,
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.pages_per_sector = 256,
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.nr_sectors = 32,
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.name = "M25P16",
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},
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{
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.idcode1 = STM_ID_M25P20,
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.page_size = 256,
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.pages_per_sector = 256,
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.nr_sectors = 4,
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.name = "M25P20",
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},
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{
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.idcode1 = STM_ID_M25P32,
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.page_size = 256,
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.pages_per_sector = 256,
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.nr_sectors = 64,
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.name = "M25P32",
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},
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{
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.idcode1 = STM_ID_M25P40,
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.page_size = 256,
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.pages_per_sector = 256,
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.nr_sectors = 8,
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.name = "M25P40",
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},
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{
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.idcode1 = STM_ID_M25P64,
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.page_size = 256,
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.pages_per_sector = 256,
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.nr_sectors = 128,
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.name = "M25P64",
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},
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{
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.idcode1 = STM_ID_M25P80,
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.page_size = 256,
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.pages_per_sector = 256,
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.nr_sectors = 16,
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.name = "M25P80",
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},
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{
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.idcode1 = STM_ID_M25P128,
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.page_size = 256,
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.pages_per_sector = 1024,
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.nr_sectors = 64,
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.name = "M25P128",
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},
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};
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static int stmicro_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_M25PXX_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 & STMICRO_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 & STMICRO_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 stmicro_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 stmicro_spi_flash *stm = to_stmicro_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 = stm->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 stmicro_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 stmicro_spi_flash *stm = to_stmicro_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 = stm->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_M25PXX_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_M25PXX_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: STMicro Page Program failed\n");
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break;
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}
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ret = stmicro_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
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if (ret < 0) {
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debug("SF: STMicro 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: STMicro: 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 stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
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{
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struct stmicro_spi_flash *stm = to_stmicro_spi_flash(flash);
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unsigned long sector_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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/*
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* This function currently uses sector erase only.
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* probably speed things up by using bulk erase
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* when possible.
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*/
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sector_size = stm->params->page_size * stm->params->pages_per_sector;
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if (offset % sector_size || len % sector_size) {
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debug("SF: Erase offset/length not multiple of sector size\n");
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return -1;
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}
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len /= sector_size;
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cmd[0] = CMD_M25PXX_SE;
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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 >> 16;
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offset += sector_size;
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ret = spi_flash_cmd(flash->spi, CMD_M25PXX_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: STMicro page erase failed\n");
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break;
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}
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ret = stmicro_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
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if (ret < 0) {
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debug("SF: STMicro page erase timed out\n");
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break;
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}
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}
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debug("SF: STMicro: Successfully erased %u bytes @ 0x%x\n",
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len * sector_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_stmicro(struct spi_slave *spi, u8 * idcode)
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{
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const struct stmicro_spi_flash_params *params;
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struct stmicro_spi_flash *stm;
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unsigned int i;
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if (idcode[0] == 0xff) {
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i = spi_flash_cmd(spi, CMD_M25PXX_RES,
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idcode, 4);
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if (i)
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return NULL;
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if ((idcode[3] & 0xf0) == 0x10) {
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idcode[0] = 0x20;
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idcode[1] = 0x20;
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idcode[2] = idcode[3] + 1;
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} else
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return NULL;
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}
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for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
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params = &stmicro_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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}
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if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
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debug("SF: Unsupported STMicro ID %02x\n", idcode[1]);
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return NULL;
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}
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stm = malloc(sizeof(struct stmicro_spi_flash));
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if (!stm) {
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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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stm->params = params;
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stm->flash.spi = spi;
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stm->flash.name = params->name;
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stm->flash.write = stmicro_write;
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stm->flash.erase = stmicro_erase;
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stm->flash.read = stmicro_read_fast;
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stm->flash.size = params->page_size * params->pages_per_sector
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* params->nr_sectors;
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printf("SF: Detected %s with page size %u, total ",
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params->name, params->page_size);
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print_size(stm->flash.size, "\n");
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return &stm->flash;
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}
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