Stefan Reinauer | 1c56d9b | 2012-05-10 11:27:32 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * (C) Copyright 2000-2002 |
| 3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 4 | * |
| 5 | * Copyright 2008, Network Appliance Inc. |
| 6 | * Jason McMullan <mcmullan@netapp.com> |
| 7 | * |
| 8 | * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. |
| 9 | * TsiChung Liew (Tsi-Chung.Liew@freescale.com) |
| 10 | * |
| 11 | * See file CREDITS for list of people who contributed to this |
| 12 | * project. |
| 13 | * |
| 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. |
| 18 | * |
| 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. |
| 23 | * |
| 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, |
| 27 | * MA 02111-1307 USA |
| 28 | */ |
| 29 | |
| 30 | #include <stdlib.h> |
| 31 | #include <spi_flash.h> |
| 32 | #include "spi_flash_internal.h" |
| 33 | |
| 34 | /* M25Pxx-specific commands */ |
| 35 | #define CMD_M25PXX_WREN 0x06 /* Write Enable */ |
| 36 | #define CMD_M25PXX_WRDI 0x04 /* Write Disable */ |
| 37 | #define CMD_M25PXX_RDSR 0x05 /* Read Status Register */ |
| 38 | #define CMD_M25PXX_WRSR 0x01 /* Write Status Register */ |
| 39 | #define CMD_M25PXX_READ 0x03 /* Read Data Bytes */ |
| 40 | #define CMD_M25PXX_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */ |
| 41 | #define CMD_M25PXX_PP 0x02 /* Page Program */ |
| 42 | #define CMD_M25PXX_SE 0xd8 /* Sector Erase */ |
| 43 | #define CMD_M25PXX_BE 0xc7 /* Bulk Erase */ |
| 44 | #define CMD_M25PXX_DP 0xb9 /* Deep Power-down */ |
| 45 | #define CMD_M25PXX_RES 0xab /* Release from DP, and Read Signature */ |
| 46 | |
| 47 | #define STM_ID_M25P10 0x11 |
| 48 | #define STM_ID_M25P16 0x15 |
| 49 | #define STM_ID_M25P20 0x12 |
| 50 | #define STM_ID_M25P32 0x16 |
| 51 | #define STM_ID_M25P40 0x13 |
| 52 | #define STM_ID_M25P64 0x17 |
| 53 | #define STM_ID_M25P80 0x14 |
| 54 | #define STM_ID_M25P128 0x18 |
| 55 | |
| 56 | struct stmicro_spi_flash_params { |
| 57 | u8 idcode1; |
| 58 | u16 page_size; |
| 59 | u16 pages_per_sector; |
| 60 | u16 nr_sectors; |
| 61 | const char *name; |
| 62 | }; |
| 63 | |
| 64 | /* spi_flash needs to be first so upper layers can free() it */ |
| 65 | struct stmicro_spi_flash { |
| 66 | struct spi_flash flash; |
| 67 | const struct stmicro_spi_flash_params *params; |
| 68 | }; |
| 69 | |
| 70 | static inline struct stmicro_spi_flash *to_stmicro_spi_flash(struct spi_flash |
| 71 | *flash) |
| 72 | { |
| 73 | return container_of(flash, struct stmicro_spi_flash, flash); |
| 74 | } |
| 75 | |
| 76 | static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = { |
| 77 | { |
| 78 | .idcode1 = STM_ID_M25P10, |
| 79 | .page_size = 256, |
| 80 | .pages_per_sector = 128, |
| 81 | .nr_sectors = 4, |
| 82 | .name = "M25P10", |
| 83 | }, |
| 84 | { |
| 85 | .idcode1 = STM_ID_M25P16, |
| 86 | .page_size = 256, |
| 87 | .pages_per_sector = 256, |
| 88 | .nr_sectors = 32, |
| 89 | .name = "M25P16", |
| 90 | }, |
| 91 | { |
| 92 | .idcode1 = STM_ID_M25P20, |
| 93 | .page_size = 256, |
| 94 | .pages_per_sector = 256, |
| 95 | .nr_sectors = 4, |
| 96 | .name = "M25P20", |
| 97 | }, |
| 98 | { |
| 99 | .idcode1 = STM_ID_M25P32, |
| 100 | .page_size = 256, |
| 101 | .pages_per_sector = 256, |
| 102 | .nr_sectors = 64, |
| 103 | .name = "M25P32", |
| 104 | }, |
| 105 | { |
| 106 | .idcode1 = STM_ID_M25P40, |
| 107 | .page_size = 256, |
| 108 | .pages_per_sector = 256, |
| 109 | .nr_sectors = 8, |
| 110 | .name = "M25P40", |
| 111 | }, |
| 112 | { |
| 113 | .idcode1 = STM_ID_M25P64, |
| 114 | .page_size = 256, |
| 115 | .pages_per_sector = 256, |
| 116 | .nr_sectors = 128, |
| 117 | .name = "M25P64", |
| 118 | }, |
| 119 | { |
| 120 | .idcode1 = STM_ID_M25P80, |
| 121 | .page_size = 256, |
| 122 | .pages_per_sector = 256, |
| 123 | .nr_sectors = 16, |
| 124 | .name = "M25P80", |
| 125 | }, |
| 126 | { |
| 127 | .idcode1 = STM_ID_M25P128, |
| 128 | .page_size = 256, |
| 129 | .pages_per_sector = 1024, |
| 130 | .nr_sectors = 64, |
| 131 | .name = "M25P128", |
| 132 | }, |
| 133 | }; |
| 134 | |
| 135 | static int stmicro_write(struct spi_flash *flash, |
| 136 | u32 offset, size_t len, const void *buf) |
| 137 | { |
| 138 | struct stmicro_spi_flash *stm = to_stmicro_spi_flash(flash); |
| 139 | unsigned long page_addr; |
| 140 | unsigned long byte_addr; |
| 141 | unsigned long page_size; |
| 142 | size_t chunk_len; |
| 143 | size_t actual; |
| 144 | int ret; |
| 145 | u8 cmd[4]; |
| 146 | |
| 147 | page_size = stm->params->page_size; |
| 148 | page_addr = offset / page_size; |
| 149 | byte_addr = offset % page_size; |
| 150 | |
| 151 | ret = spi_claim_bus(flash->spi); |
| 152 | if (ret) { |
| 153 | printk(BIOS_WARNING, "SF: Unable to claim SPI bus\n"); |
| 154 | return ret; |
| 155 | } |
| 156 | |
| 157 | ret = 0; |
| 158 | for (actual = 0; actual < len; actual += chunk_len) { |
| 159 | chunk_len = min(len - actual, page_size - byte_addr); |
| 160 | |
| 161 | cmd[0] = CMD_M25PXX_PP; |
| 162 | cmd[1] = page_addr >> 8; |
| 163 | cmd[2] = page_addr; |
| 164 | cmd[3] = byte_addr; |
| 165 | |
| 166 | printk(BIOS_SPEW, "PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zd\n", |
| 167 | buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len); |
| 168 | |
| 169 | ret = spi_flash_cmd(flash->spi, CMD_M25PXX_WREN, NULL, 0); |
| 170 | if (ret < 0) { |
| 171 | printk(BIOS_WARNING, "SF: Enabling Write failed\n"); |
| 172 | break; |
| 173 | } |
| 174 | |
| 175 | ret = spi_flash_cmd_write(flash->spi, cmd, 4, |
| 176 | buf + actual, chunk_len); |
| 177 | if (ret < 0) { |
| 178 | printk(BIOS_WARNING, "SF: STMicro Page Program failed\n"); |
| 179 | break; |
| 180 | } |
| 181 | |
| 182 | ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); |
| 183 | if (ret) |
| 184 | break; |
| 185 | |
| 186 | page_addr++; |
| 187 | byte_addr = 0; |
| 188 | } |
| 189 | |
| 190 | printk(BIOS_INFO, "SF: STMicro: Successfully programmed %zu bytes @ 0x%x\n", |
| 191 | len, offset); |
| 192 | |
| 193 | spi_release_bus(flash->spi); |
| 194 | return ret; |
| 195 | } |
| 196 | |
| 197 | static int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len) |
| 198 | { |
| 199 | return spi_flash_cmd_erase(flash, CMD_M25PXX_SE, offset, len); |
| 200 | } |
| 201 | |
| 202 | struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode) |
| 203 | { |
| 204 | const struct stmicro_spi_flash_params *params; |
| 205 | struct stmicro_spi_flash *stm; |
| 206 | unsigned int i; |
| 207 | |
| 208 | if (idcode[0] == 0xff) { |
| 209 | i = spi_flash_cmd(spi, CMD_M25PXX_RES, |
| 210 | idcode, 4); |
| 211 | if (i) |
| 212 | return NULL; |
| 213 | if ((idcode[3] & 0xf0) == 0x10) { |
| 214 | idcode[0] = 0x20; |
| 215 | idcode[1] = 0x20; |
| 216 | idcode[2] = idcode[3] + 1; |
| 217 | } else |
| 218 | return NULL; |
| 219 | } |
| 220 | |
| 221 | for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) { |
| 222 | params = &stmicro_spi_flash_table[i]; |
| 223 | if (params->idcode1 == idcode[2]) { |
| 224 | break; |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | if (i == ARRAY_SIZE(stmicro_spi_flash_table)) { |
| 229 | printk(BIOS_WARNING, "SF: Unsupported STMicro ID %02x\n", idcode[1]); |
| 230 | return NULL; |
| 231 | } |
| 232 | |
| 233 | stm = malloc(sizeof(struct stmicro_spi_flash)); |
| 234 | if (!stm) { |
| 235 | printk(BIOS_WARNING, "SF: Failed to allocate memory\n"); |
| 236 | return NULL; |
| 237 | } |
| 238 | |
| 239 | stm->params = params; |
| 240 | stm->flash.spi = spi; |
| 241 | stm->flash.name = params->name; |
| 242 | |
| 243 | stm->flash.write = stmicro_write; |
| 244 | stm->flash.erase = stmicro_erase; |
| 245 | stm->flash.read = spi_flash_cmd_read_fast; |
| 246 | stm->flash.sector_size = params->page_size * params->pages_per_sector; |
| 247 | stm->flash.size = stm->flash.sector_size * params->nr_sectors; |
| 248 | |
| 249 | return &stm->flash; |
| 250 | } |