2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * Copyright 2008, Network Appliance Inc.
6 * Jason McMullan <mcmullan@netapp.com>
8 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
9 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 #include <spi_flash.h>
34 #include "spi_flash_internal.h"
36 /* M25Pxx-specific commands */
37 #define CMD_M25PXX_WREN 0x06 /* Write Enable */
38 #define CMD_M25PXX_WRDI 0x04 /* Write Disable */
39 #define CMD_M25PXX_RDSR 0x05 /* Read Status Register */
40 #define CMD_M25PXX_WRSR 0x01 /* Write Status Register */
41 #define CMD_M25PXX_READ 0x03 /* Read Data Bytes */
42 #define CMD_M25PXX_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
43 #define CMD_M25PXX_PP 0x02 /* Page Program */
44 #define CMD_M25PXX_SE 0xd8 /* Sector Erase */
45 #define CMD_M25PXX_BE 0xc7 /* Bulk Erase */
46 #define CMD_M25PXX_DP 0xb9 /* Deep Power-down */
47 #define CMD_M25PXX_RES 0xab /* Release from DP, and Read Signature */
49 #define STM_ID_M25P10 0x11
50 #define STM_ID_M25P16 0x15
51 #define STM_ID_M25P20 0x12
52 #define STM_ID_M25P32 0x16
53 #define STM_ID_M25P40 0x13
54 #define STM_ID_M25P64 0x17
55 #define STM_ID_M25P80 0x14
56 #define STM_ID_M25P128 0x18
58 struct stmicro_spi_flash_params {
66 /* spi_flash needs to be first so upper layers can free() it */
67 struct stmicro_spi_flash {
68 struct spi_flash flash;
69 const struct stmicro_spi_flash_params *params;
72 static inline struct stmicro_spi_flash *to_stmicro_spi_flash(struct spi_flash
75 return container_of(flash, struct stmicro_spi_flash, flash);
78 static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
80 .idcode1 = STM_ID_M25P10,
82 .pages_per_sector = 128,
87 .idcode1 = STM_ID_M25P16,
89 .pages_per_sector = 256,
94 .idcode1 = STM_ID_M25P20,
96 .pages_per_sector = 256,
101 .idcode1 = STM_ID_M25P32,
103 .pages_per_sector = 256,
108 .idcode1 = STM_ID_M25P40,
110 .pages_per_sector = 256,
115 .idcode1 = STM_ID_M25P64,
117 .pages_per_sector = 256,
122 .idcode1 = STM_ID_M25P80,
124 .pages_per_sector = 256,
129 .idcode1 = STM_ID_M25P128,
131 .pages_per_sector = 1024,
137 static int stmicro_write(struct spi_flash *flash,
138 u32 offset, size_t len, const void *buf)
140 struct stmicro_spi_flash *stm = to_stmicro_spi_flash(flash);
141 unsigned long page_addr;
142 unsigned long byte_addr;
143 unsigned long page_size;
149 page_size = stm->params->page_size;
150 page_addr = offset / page_size;
151 byte_addr = offset % page_size;
153 ret = spi_claim_bus(flash->spi);
155 debug("SF: Unable to claim SPI bus\n");
160 for (actual = 0; actual < len; actual += chunk_len) {
161 chunk_len = min(len - actual, page_size - byte_addr);
163 cmd[0] = CMD_M25PXX_PP;
164 cmd[1] = page_addr >> 8;
169 ("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %d\n",
170 buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
172 ret = spi_flash_cmd(flash->spi, CMD_M25PXX_WREN, NULL, 0);
174 debug("SF: Enabling Write failed\n");
178 ret = spi_flash_cmd_write(flash->spi, cmd, 4,
179 buf + actual, chunk_len);
181 debug("SF: STMicro Page Program failed\n");
185 ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
193 debug("SF: STMicro: Successfully programmed %u bytes @ 0x%x\n",
196 spi_release_bus(flash->spi);
200 static int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
202 return spi_flash_cmd_erase(flash, CMD_M25PXX_SE, offset, len);
205 struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
207 const struct stmicro_spi_flash_params *params;
208 struct stmicro_spi_flash *stm;
211 if (idcode[0] == 0xff) {
212 i = spi_flash_cmd(spi, CMD_M25PXX_RES,
216 if ((idcode[3] & 0xf0) == 0x10) {
219 idcode[2] = idcode[3] + 1;
224 for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
225 params = &stmicro_spi_flash_table[i];
226 if (params->idcode1 == idcode[2]) {
231 if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
232 debug("SF: Unsupported STMicro ID %02x\n", idcode[1]);
236 stm = malloc(sizeof(struct stmicro_spi_flash));
238 debug("SF: Failed to allocate memory\n");
242 stm->params = params;
243 stm->flash.spi = spi;
244 stm->flash.name = params->name;
246 stm->flash.write = stmicro_write;
247 stm->flash.erase = stmicro_erase;
248 stm->flash.read = spi_flash_cmd_read_fast;
249 stm->flash.sector_size = params->page_size * params->pages_per_sector;
250 stm->flash.size = stm->flash.sector_size * params->nr_sectors;