/* * Copyright (C) 2014 Idwer Vollering <vidwer@gmail.com> * * Based on winbond.c * * Copyright 2008, Network Appliance Inc. * Author: Jason McMullan <mcmullan <at> netapp.com> * Licensed under the GPL-2 or later. */ #include <console/console.h> #include <stdlib.h> #include <spi_flash.h> #include <spi-generic.h> #include <string.h> #include "spi_flash_internal.h" /* A25L-specific commands */ #define CMD_A25_WREN 0x06 /* Write Enable */ #define CMD_A25_WRDI 0x04 /* Write Disable */ #define CMD_A25_RDSR 0x05 /* Read Status Register */ #define CMD_A25_WRSR 0x01 /* Write Status Register */ #define CMD_A25_READ 0x03 /* Read Data Bytes */ #define CMD_A25_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */ #define CMD_A25_PP 0x02 /* Page Program */ #define CMD_A25_SE 0x20 /* Sector (4K) Erase */ #define CMD_A25_BE 0xd8 /* Block (64K) Erase */ #define CMD_A25_CE 0xc7 /* Chip Erase */ #define CMD_A25_DP 0xb9 /* Deep Power-down */ #define CMD_A25_RES 0xab /* Release from DP, and Read Signature */ struct amic_spi_flash_params { uint16_t id; /* Log2 of page size in power-of-two mode */ uint8_t l2_page_size; uint16_t pages_per_sector; uint16_t sectors_per_block; uint16_t nr_blocks; const char *name; }; static const struct amic_spi_flash_params amic_spi_flash_table[] = { { .id = 0x3016, .l2_page_size = 8, .pages_per_sector = 16, .sectors_per_block = 16, .nr_blocks = 64, .name = "A25L032", }, }; static int amic_write(const struct spi_flash *flash, u32 offset, size_t len, const void *buf) { unsigned long byte_addr; unsigned long page_size; size_t chunk_len; size_t actual; int ret; u8 cmd[4]; page_size = flash->page_size; byte_addr = offset % page_size; for (actual = 0; actual < len; actual += chunk_len) { chunk_len = min(len - actual, page_size - byte_addr); chunk_len = spi_crop_chunk(&flash->spi, sizeof(cmd), chunk_len); cmd[0] = CMD_A25_PP; cmd[1] = (offset >> 16) & 0xff; cmd[2] = (offset >> 8) & 0xff; cmd[3] = offset & 0xff; #if IS_ENABLED(CONFIG_DEBUG_SPI_FLASH) printk(BIOS_SPEW, "PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x }" " chunk_len = %zu\n", buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len); #endif ret = spi_flash_cmd(&flash->spi, CMD_A25_WREN, NULL, 0); if (ret < 0) { printk(BIOS_WARNING, "SF: Enabling Write failed\n"); goto out; } ret = spi_flash_cmd_write(&flash->spi, cmd, sizeof(cmd), buf + actual, chunk_len); if (ret < 0) { printk(BIOS_WARNING, "SF: AMIC Page Program failed\n"); goto out; } ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); if (ret) goto out; offset += chunk_len; byte_addr = 0; } #if IS_ENABLED(CONFIG_DEBUG_SPI_FLASH) printk(BIOS_SPEW, "SF: AMIC: Successfully programmed %zu bytes @" " 0x%lx\n", len, (unsigned long)(offset - len)); #endif ret = 0; out: return ret; } static const struct spi_flash_ops spi_flash_ops = { .write = amic_write, .erase = spi_flash_cmd_erase, #if IS_ENABLED(CONFIG_SPI_FLASH_NO_FAST_READ) .read = spi_flash_cmd_read_slow, #else .read = spi_flash_cmd_read_fast, #endif }; int spi_flash_probe_amic(const struct spi_slave *spi, u8 *idcode, struct spi_flash *flash) { const struct amic_spi_flash_params *params; unsigned int i; for (i = 0; i < ARRAY_SIZE(amic_spi_flash_table); i++) { params = &amic_spi_flash_table[i]; if (params->id == ((idcode[1] << 8) | idcode[2])) break; } if (i == ARRAY_SIZE(amic_spi_flash_table)) { printk(BIOS_WARNING, "SF: Unsupported AMIC ID %02x%02x\n", idcode[1], idcode[2]); return -1; } memcpy(&flash->spi, spi, sizeof(*spi)); flash->name = params->name; /* Assuming power-of-two page size initially. */ flash->page_size = 1 << params->l2_page_size; flash->sector_size = flash->page_size * params->pages_per_sector; flash->size = flash->sector_size * params->sectors_per_block * params->nr_blocks; flash->erase_cmd = CMD_A25_SE; flash->ops = &spi_flash_ops; return 0; }