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https://github.com/brain-hackers/u-boot-brain
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![Mike Frysinger](/assets/img/avatar_default.png)
No need for these to be exported as they are only accessed indirectly via function pointers. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
221 lines
5.2 KiB
C
221 lines
5.2 KiB
C
/*
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* Copyright 2008, Network Appliance Inc.
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* Author: Jason McMullan <mcmullan <at> netapp.com>
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* Licensed under the GPL-2 or later.
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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_W25_WREN 0x06 /* Write Enable */
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#define CMD_W25_WRDI 0x04 /* Write Disable */
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#define CMD_W25_RDSR 0x05 /* Read Status Register */
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#define CMD_W25_WRSR 0x01 /* Write Status Register */
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#define CMD_W25_READ 0x03 /* Read Data Bytes */
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#define CMD_W25_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
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#define CMD_W25_PP 0x02 /* Page Program */
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#define CMD_W25_SE 0x20 /* Sector (4K) Erase */
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#define CMD_W25_BE 0xd8 /* Block (64K) Erase */
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#define CMD_W25_CE 0xc7 /* Chip Erase */
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#define CMD_W25_DP 0xb9 /* Deep Power-down */
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#define CMD_W25_RES 0xab /* Release from DP, and Read Signature */
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struct winbond_spi_flash_params {
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uint16_t id;
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/* Log2 of page size in power-of-two mode */
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uint8_t l2_page_size;
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uint16_t pages_per_sector;
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uint16_t sectors_per_block;
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uint16_t nr_blocks;
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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 winbond_spi_flash {
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struct spi_flash flash;
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const struct winbond_spi_flash_params *params;
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};
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static inline struct winbond_spi_flash *
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to_winbond_spi_flash(struct spi_flash *flash)
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{
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return container_of(flash, struct winbond_spi_flash, flash);
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}
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static const struct winbond_spi_flash_params winbond_spi_flash_table[] = {
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{
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.id = 0x3015,
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.l2_page_size = 8,
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.pages_per_sector = 16,
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.sectors_per_block = 16,
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.nr_blocks = 32,
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.name = "W25X16",
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},
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{
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.id = 0x3016,
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.l2_page_size = 8,
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.pages_per_sector = 16,
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.sectors_per_block = 16,
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.nr_blocks = 64,
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.name = "W25X32",
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},
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{
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.id = 0x3017,
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.l2_page_size = 8,
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.pages_per_sector = 16,
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.sectors_per_block = 16,
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.nr_blocks = 128,
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.name = "W25X64",
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},
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{
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.id = 0x4015,
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.l2_page_size = 8,
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.pages_per_sector = 16,
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.sectors_per_block = 16,
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.nr_blocks = 32,
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.name = "W25Q16",
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},
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{
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.id = 0x4016,
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.l2_page_size = 8,
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.pages_per_sector = 16,
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.sectors_per_block = 16,
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.nr_blocks = 64,
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.name = "W25Q32",
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},
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{
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.id = 0x4017,
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.l2_page_size = 8,
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.pages_per_sector = 16,
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.sectors_per_block = 16,
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.nr_blocks = 128,
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.name = "W25Q64",
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},
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{
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.id = 0x4018,
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.l2_page_size = 8,
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.pages_per_sector = 16,
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.sectors_per_block = 16,
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.nr_blocks = 256,
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.name = "W25Q128",
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},
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};
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static int winbond_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 winbond_spi_flash *stm = to_winbond_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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unsigned int page_shift;
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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_shift = stm->params->l2_page_size;
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page_size = (1 << page_shift);
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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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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_W25_PP;
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cmd[1] = page_addr >> (16 - page_shift);
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cmd[2] = page_addr << (page_shift - 8) | (byte_addr >> 8);
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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 = %d\n",
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buf + actual,
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cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
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ret = spi_flash_cmd(flash->spi, CMD_W25_WREN, NULL, 0);
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if (ret < 0) {
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debug("SF: Enabling Write failed\n");
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goto out;
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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: Winbond Page Program failed\n");
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goto out;
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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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goto out;
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page_addr++;
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byte_addr = 0;
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}
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debug("SF: Winbond: Successfully programmed %u bytes @ 0x%x\n",
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len, offset);
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ret = 0;
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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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static int winbond_erase(struct spi_flash *flash, u32 offset, size_t len)
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{
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return spi_flash_cmd_erase(flash, CMD_W25_SE, offset, len);
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}
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struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
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{
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const struct winbond_spi_flash_params *params;
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unsigned page_size;
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struct winbond_spi_flash *stm;
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(winbond_spi_flash_table); i++) {
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params = &winbond_spi_flash_table[i];
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if (params->id == ((idcode[1] << 8) | idcode[2]))
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break;
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}
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if (i == ARRAY_SIZE(winbond_spi_flash_table)) {
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debug("SF: Unsupported Winbond ID %02x%02x\n",
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idcode[1], idcode[2]);
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return NULL;
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}
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stm = malloc(sizeof(struct winbond_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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/* Assuming power-of-two page size initially. */
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page_size = 1 << params->l2_page_size;
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stm->flash.write = winbond_write;
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stm->flash.erase = winbond_erase;
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stm->flash.read = spi_flash_cmd_read_fast;
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stm->flash.sector_size = (1 << stm->params->l2_page_size) *
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stm->params->pages_per_sector;
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stm->flash.size = page_size * params->pages_per_sector
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* params->sectors_per_block
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* params->nr_blocks;
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return &stm->flash;
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}
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