Wolfgang Denk
17 years ago
commit
52bacb9879
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/*
|
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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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|
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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_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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struct stmicro_spi_flash { |
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const struct stmicro_spi_flash_params *params; |
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struct spi_flash flash; |
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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_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 status; |
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u8 cmd[4] = { CMD_M25PXX_RDSR, 0xff, 0xff, 0xff }; |
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ret = spi_xfer(spi, 32, &cmd[0], 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 / sector_size) + actual; |
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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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/* Up to 2 seconds */ |
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ret = stmicro_wait_ready(flash, 2 * CFG_HZ); |
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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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int ret; |
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u8 id[3]; |
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ret = spi_flash_cmd(spi, CMD_READ_ID, id, sizeof(id)); |
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if (ret) |
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return NULL; |
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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", id[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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debug("SF: Detected %s with page size %u, total %u bytes\n", |
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params->name, params->page_size, stm->flash.size); |
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return &stm->flash; |
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} |
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