mirror of https://gitee.com/openkylin/linux.git
1233 lines
35 KiB
C
1233 lines
35 KiB
C
/*
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* Based on m25p80.c, by Mike Lavender (mike@steroidmicros.com), with
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* influence from lart.c (Abraham Van Der Merwe) and mtd_dataflash.c
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*
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* Copyright (C) 2005, Intec Automation Inc.
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* Copyright (C) 2014, Freescale Semiconductor, Inc.
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*
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* This code is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/err.h>
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/mutex.h>
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#include <linux/math64.h>
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#include <linux/mtd/cfi.h>
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#include <linux/mtd/mtd.h>
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#include <linux/of_platform.h>
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#include <linux/spi/flash.h>
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#include <linux/mtd/spi-nor.h>
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/* Define max times to check status register before we give up. */
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#define MAX_READY_WAIT_JIFFIES (40 * HZ) /* M25P16 specs 40s max chip erase */
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#define SPI_NOR_MAX_ID_LEN 6
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struct flash_info {
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char *name;
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/*
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* This array stores the ID bytes.
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* The first three bytes are the JEDIC ID.
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* JEDEC ID zero means "no ID" (mostly older chips).
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*/
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u8 id[SPI_NOR_MAX_ID_LEN];
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u8 id_len;
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/* The size listed here is what works with SPINOR_OP_SE, which isn't
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* necessarily called a "sector" by the vendor.
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*/
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unsigned sector_size;
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u16 n_sectors;
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u16 page_size;
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u16 addr_width;
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u16 flags;
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#define SECT_4K 0x01 /* SPINOR_OP_BE_4K works uniformly */
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#define SPI_NOR_NO_ERASE 0x02 /* No erase command needed */
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#define SST_WRITE 0x04 /* use SST byte programming */
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#define SPI_NOR_NO_FR 0x08 /* Can't do fastread */
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#define SECT_4K_PMC 0x10 /* SPINOR_OP_BE_4K_PMC works uniformly */
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#define SPI_NOR_DUAL_READ 0x20 /* Flash supports Dual Read */
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#define SPI_NOR_QUAD_READ 0x40 /* Flash supports Quad Read */
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#define USE_FSR 0x80 /* use flag status register */
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};
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#define JEDEC_MFR(info) ((info)->id[0])
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static const struct flash_info *spi_nor_match_id(const char *name);
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/*
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* Read the status register, returning its value in the location
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* Return the status register value.
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* Returns negative if error occurred.
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*/
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static int read_sr(struct spi_nor *nor)
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{
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int ret;
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u8 val;
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ret = nor->read_reg(nor, SPINOR_OP_RDSR, &val, 1);
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if (ret < 0) {
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pr_err("error %d reading SR\n", (int) ret);
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return ret;
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}
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return val;
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}
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/*
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* Read the flag status register, returning its value in the location
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* Return the status register value.
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* Returns negative if error occurred.
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*/
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static int read_fsr(struct spi_nor *nor)
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{
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int ret;
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u8 val;
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ret = nor->read_reg(nor, SPINOR_OP_RDFSR, &val, 1);
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if (ret < 0) {
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pr_err("error %d reading FSR\n", ret);
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return ret;
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}
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return val;
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}
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/*
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* Read configuration register, returning its value in the
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* location. Return the configuration register value.
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* Returns negative if error occured.
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*/
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static int read_cr(struct spi_nor *nor)
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{
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int ret;
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u8 val;
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ret = nor->read_reg(nor, SPINOR_OP_RDCR, &val, 1);
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if (ret < 0) {
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dev_err(nor->dev, "error %d reading CR\n", ret);
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return ret;
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}
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return val;
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}
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/*
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* Dummy Cycle calculation for different type of read.
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* It can be used to support more commands with
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* different dummy cycle requirements.
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*/
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static inline int spi_nor_read_dummy_cycles(struct spi_nor *nor)
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{
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switch (nor->flash_read) {
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case SPI_NOR_FAST:
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case SPI_NOR_DUAL:
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case SPI_NOR_QUAD:
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return 8;
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case SPI_NOR_NORMAL:
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return 0;
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}
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return 0;
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}
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/*
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* Write status register 1 byte
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* Returns negative if error occurred.
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*/
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static inline int write_sr(struct spi_nor *nor, u8 val)
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{
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nor->cmd_buf[0] = val;
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return nor->write_reg(nor, SPINOR_OP_WRSR, nor->cmd_buf, 1, 0);
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}
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/*
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* Set write enable latch with Write Enable command.
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* Returns negative if error occurred.
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*/
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static inline int write_enable(struct spi_nor *nor)
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{
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return nor->write_reg(nor, SPINOR_OP_WREN, NULL, 0, 0);
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}
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/*
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* Send write disble instruction to the chip.
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*/
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static inline int write_disable(struct spi_nor *nor)
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{
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return nor->write_reg(nor, SPINOR_OP_WRDI, NULL, 0, 0);
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}
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static inline struct spi_nor *mtd_to_spi_nor(struct mtd_info *mtd)
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{
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return mtd->priv;
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}
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/* Enable/disable 4-byte addressing mode. */
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static inline int set_4byte(struct spi_nor *nor, const struct flash_info *info,
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int enable)
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{
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int status;
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bool need_wren = false;
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u8 cmd;
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switch (JEDEC_MFR(info)) {
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case CFI_MFR_ST: /* Micron, actually */
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/* Some Micron need WREN command; all will accept it */
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need_wren = true;
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case CFI_MFR_MACRONIX:
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case 0xEF /* winbond */:
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if (need_wren)
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write_enable(nor);
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cmd = enable ? SPINOR_OP_EN4B : SPINOR_OP_EX4B;
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status = nor->write_reg(nor, cmd, NULL, 0, 0);
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if (need_wren)
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write_disable(nor);
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return status;
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default:
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/* Spansion style */
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nor->cmd_buf[0] = enable << 7;
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return nor->write_reg(nor, SPINOR_OP_BRWR, nor->cmd_buf, 1, 0);
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}
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}
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static inline int spi_nor_sr_ready(struct spi_nor *nor)
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{
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int sr = read_sr(nor);
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if (sr < 0)
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return sr;
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else
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return !(sr & SR_WIP);
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}
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static inline int spi_nor_fsr_ready(struct spi_nor *nor)
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{
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int fsr = read_fsr(nor);
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if (fsr < 0)
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return fsr;
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else
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return fsr & FSR_READY;
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}
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static int spi_nor_ready(struct spi_nor *nor)
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{
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int sr, fsr;
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sr = spi_nor_sr_ready(nor);
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if (sr < 0)
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return sr;
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fsr = nor->flags & SNOR_F_USE_FSR ? spi_nor_fsr_ready(nor) : 1;
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if (fsr < 0)
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return fsr;
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return sr && fsr;
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}
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/*
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* Service routine to read status register until ready, or timeout occurs.
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* Returns non-zero if error.
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*/
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static int spi_nor_wait_till_ready(struct spi_nor *nor)
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{
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unsigned long deadline;
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int timeout = 0, ret;
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deadline = jiffies + MAX_READY_WAIT_JIFFIES;
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while (!timeout) {
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if (time_after_eq(jiffies, deadline))
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timeout = 1;
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ret = spi_nor_ready(nor);
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if (ret < 0)
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return ret;
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if (ret)
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return 0;
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cond_resched();
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}
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dev_err(nor->dev, "flash operation timed out\n");
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return -ETIMEDOUT;
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}
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/*
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* Erase the whole flash memory
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*
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* Returns 0 if successful, non-zero otherwise.
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*/
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static int erase_chip(struct spi_nor *nor)
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{
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dev_dbg(nor->dev, " %lldKiB\n", (long long)(nor->mtd->size >> 10));
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return nor->write_reg(nor, SPINOR_OP_CHIP_ERASE, NULL, 0, 0);
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}
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static int spi_nor_lock_and_prep(struct spi_nor *nor, enum spi_nor_ops ops)
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{
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int ret = 0;
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mutex_lock(&nor->lock);
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if (nor->prepare) {
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ret = nor->prepare(nor, ops);
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if (ret) {
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dev_err(nor->dev, "failed in the preparation.\n");
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mutex_unlock(&nor->lock);
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return ret;
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}
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}
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return ret;
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}
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static void spi_nor_unlock_and_unprep(struct spi_nor *nor, enum spi_nor_ops ops)
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{
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if (nor->unprepare)
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nor->unprepare(nor, ops);
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mutex_unlock(&nor->lock);
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}
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/*
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* Erase an address range on the nor chip. The address range may extend
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* one or more erase sectors. Return an error is there is a problem erasing.
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*/
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static int spi_nor_erase(struct mtd_info *mtd, struct erase_info *instr)
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{
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struct spi_nor *nor = mtd_to_spi_nor(mtd);
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u32 addr, len;
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uint32_t rem;
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int ret;
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dev_dbg(nor->dev, "at 0x%llx, len %lld\n", (long long)instr->addr,
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(long long)instr->len);
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div_u64_rem(instr->len, mtd->erasesize, &rem);
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if (rem)
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return -EINVAL;
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addr = instr->addr;
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len = instr->len;
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ret = spi_nor_lock_and_prep(nor, SPI_NOR_OPS_ERASE);
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if (ret)
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return ret;
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/* whole-chip erase? */
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if (len == mtd->size) {
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write_enable(nor);
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if (erase_chip(nor)) {
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ret = -EIO;
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goto erase_err;
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}
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ret = spi_nor_wait_till_ready(nor);
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if (ret)
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goto erase_err;
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/* REVISIT in some cases we could speed up erasing large regions
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* by using SPINOR_OP_SE instead of SPINOR_OP_BE_4K. We may have set up
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* to use "small sector erase", but that's not always optimal.
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*/
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/* "sector"-at-a-time erase */
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} else {
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while (len) {
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write_enable(nor);
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if (nor->erase(nor, addr)) {
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ret = -EIO;
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goto erase_err;
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}
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addr += mtd->erasesize;
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len -= mtd->erasesize;
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ret = spi_nor_wait_till_ready(nor);
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if (ret)
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goto erase_err;
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}
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}
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write_disable(nor);
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spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_ERASE);
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instr->state = MTD_ERASE_DONE;
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mtd_erase_callback(instr);
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return ret;
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erase_err:
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spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_ERASE);
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instr->state = MTD_ERASE_FAILED;
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return ret;
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}
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static int stm_lock(struct spi_nor *nor, loff_t ofs, uint64_t len)
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{
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struct mtd_info *mtd = nor->mtd;
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uint32_t offset = ofs;
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uint8_t status_old, status_new;
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int ret = 0;
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status_old = read_sr(nor);
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if (offset < mtd->size - (mtd->size / 2))
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status_new = status_old | SR_BP2 | SR_BP1 | SR_BP0;
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else if (offset < mtd->size - (mtd->size / 4))
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status_new = (status_old & ~SR_BP0) | SR_BP2 | SR_BP1;
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else if (offset < mtd->size - (mtd->size / 8))
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status_new = (status_old & ~SR_BP1) | SR_BP2 | SR_BP0;
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else if (offset < mtd->size - (mtd->size / 16))
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status_new = (status_old & ~(SR_BP0 | SR_BP1)) | SR_BP2;
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else if (offset < mtd->size - (mtd->size / 32))
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status_new = (status_old & ~SR_BP2) | SR_BP1 | SR_BP0;
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else if (offset < mtd->size - (mtd->size / 64))
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status_new = (status_old & ~(SR_BP2 | SR_BP0)) | SR_BP1;
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else
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status_new = (status_old & ~(SR_BP2 | SR_BP1)) | SR_BP0;
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/* Only modify protection if it will not unlock other areas */
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if ((status_new & (SR_BP2 | SR_BP1 | SR_BP0)) >
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(status_old & (SR_BP2 | SR_BP1 | SR_BP0))) {
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write_enable(nor);
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ret = write_sr(nor, status_new);
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}
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return ret;
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}
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static int stm_unlock(struct spi_nor *nor, loff_t ofs, uint64_t len)
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{
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struct mtd_info *mtd = nor->mtd;
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uint32_t offset = ofs;
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uint8_t status_old, status_new;
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int ret = 0;
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status_old = read_sr(nor);
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if (offset+len > mtd->size - (mtd->size / 64))
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status_new = status_old & ~(SR_BP2 | SR_BP1 | SR_BP0);
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else if (offset+len > mtd->size - (mtd->size / 32))
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status_new = (status_old & ~(SR_BP2 | SR_BP1)) | SR_BP0;
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else if (offset+len > mtd->size - (mtd->size / 16))
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status_new = (status_old & ~(SR_BP2 | SR_BP0)) | SR_BP1;
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else if (offset+len > mtd->size - (mtd->size / 8))
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status_new = (status_old & ~SR_BP2) | SR_BP1 | SR_BP0;
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else if (offset+len > mtd->size - (mtd->size / 4))
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status_new = (status_old & ~(SR_BP0 | SR_BP1)) | SR_BP2;
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else if (offset+len > mtd->size - (mtd->size / 2))
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status_new = (status_old & ~SR_BP1) | SR_BP2 | SR_BP0;
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else
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status_new = (status_old & ~SR_BP0) | SR_BP2 | SR_BP1;
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/* Only modify protection if it will not lock other areas */
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if ((status_new & (SR_BP2 | SR_BP1 | SR_BP0)) <
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(status_old & (SR_BP2 | SR_BP1 | SR_BP0))) {
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write_enable(nor);
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ret = write_sr(nor, status_new);
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}
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return ret;
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}
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static int spi_nor_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
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{
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struct spi_nor *nor = mtd_to_spi_nor(mtd);
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int ret;
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ret = spi_nor_lock_and_prep(nor, SPI_NOR_OPS_LOCK);
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if (ret)
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return ret;
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ret = nor->flash_lock(nor, ofs, len);
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spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_UNLOCK);
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return ret;
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}
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static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
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{
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struct spi_nor *nor = mtd_to_spi_nor(mtd);
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int ret;
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ret = spi_nor_lock_and_prep(nor, SPI_NOR_OPS_UNLOCK);
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if (ret)
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return ret;
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ret = nor->flash_unlock(nor, ofs, len);
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spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_LOCK);
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return ret;
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}
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/* Used when the "_ext_id" is two bytes at most */
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#define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
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.id = { \
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((_jedec_id) >> 16) & 0xff, \
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((_jedec_id) >> 8) & 0xff, \
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(_jedec_id) & 0xff, \
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((_ext_id) >> 8) & 0xff, \
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(_ext_id) & 0xff, \
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}, \
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.id_len = (!(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))), \
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.sector_size = (_sector_size), \
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.n_sectors = (_n_sectors), \
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.page_size = 256, \
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.flags = (_flags),
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#define INFO6(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
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.id = { \
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((_jedec_id) >> 16) & 0xff, \
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((_jedec_id) >> 8) & 0xff, \
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(_jedec_id) & 0xff, \
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((_ext_id) >> 16) & 0xff, \
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((_ext_id) >> 8) & 0xff, \
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(_ext_id) & 0xff, \
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}, \
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.id_len = 6, \
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.sector_size = (_sector_size), \
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.n_sectors = (_n_sectors), \
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.page_size = 256, \
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.flags = (_flags),
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#define CAT25_INFO(_sector_size, _n_sectors, _page_size, _addr_width, _flags) \
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.sector_size = (_sector_size), \
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.n_sectors = (_n_sectors), \
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.page_size = (_page_size), \
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.addr_width = (_addr_width), \
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.flags = (_flags),
|
|
|
|
/* NOTE: double check command sets and memory organization when you add
|
|
* more nor chips. This current list focusses on newer chips, which
|
|
* have been converging on command sets which including JEDEC ID.
|
|
*
|
|
* All newly added entries should describe *hardware* and should use SECT_4K
|
|
* (or SECT_4K_PMC) if hardware supports erasing 4 KiB sectors. For usage
|
|
* scenarios excluding small sectors there is config option that can be
|
|
* disabled: CONFIG_MTD_SPI_NOR_USE_4K_SECTORS.
|
|
* For historical (and compatibility) reasons (before we got above config) some
|
|
* old entries may be missing 4K flag.
|
|
*/
|
|
static const struct flash_info spi_nor_ids[] = {
|
|
/* Atmel -- some are (confusingly) marketed as "DataFlash" */
|
|
{ "at25fs010", INFO(0x1f6601, 0, 32 * 1024, 4, SECT_4K) },
|
|
{ "at25fs040", INFO(0x1f6604, 0, 64 * 1024, 8, SECT_4K) },
|
|
|
|
{ "at25df041a", INFO(0x1f4401, 0, 64 * 1024, 8, SECT_4K) },
|
|
{ "at25df321a", INFO(0x1f4701, 0, 64 * 1024, 64, SECT_4K) },
|
|
{ "at25df641", INFO(0x1f4800, 0, 64 * 1024, 128, SECT_4K) },
|
|
|
|
{ "at26f004", INFO(0x1f0400, 0, 64 * 1024, 8, SECT_4K) },
|
|
{ "at26df081a", INFO(0x1f4501, 0, 64 * 1024, 16, SECT_4K) },
|
|
{ "at26df161a", INFO(0x1f4601, 0, 64 * 1024, 32, SECT_4K) },
|
|
{ "at26df321", INFO(0x1f4700, 0, 64 * 1024, 64, SECT_4K) },
|
|
|
|
{ "at45db081d", INFO(0x1f2500, 0, 64 * 1024, 16, SECT_4K) },
|
|
|
|
/* EON -- en25xxx */
|
|
{ "en25f32", INFO(0x1c3116, 0, 64 * 1024, 64, SECT_4K) },
|
|
{ "en25p32", INFO(0x1c2016, 0, 64 * 1024, 64, 0) },
|
|
{ "en25q32b", INFO(0x1c3016, 0, 64 * 1024, 64, 0) },
|
|
{ "en25p64", INFO(0x1c2017, 0, 64 * 1024, 128, 0) },
|
|
{ "en25q64", INFO(0x1c3017, 0, 64 * 1024, 128, SECT_4K) },
|
|
{ "en25qh128", INFO(0x1c7018, 0, 64 * 1024, 256, 0) },
|
|
{ "en25qh256", INFO(0x1c7019, 0, 64 * 1024, 512, 0) },
|
|
{ "en25s64", INFO(0x1c3817, 0, 64 * 1024, 128, SECT_4K) },
|
|
|
|
/* ESMT */
|
|
{ "f25l32pa", INFO(0x8c2016, 0, 64 * 1024, 64, SECT_4K) },
|
|
|
|
/* Everspin */
|
|
{ "mr25h256", CAT25_INFO( 32 * 1024, 1, 256, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
|
|
{ "mr25h10", CAT25_INFO(128 * 1024, 1, 256, 3, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
|
|
|
|
/* Fujitsu */
|
|
{ "mb85rs1mt", INFO(0x047f27, 0, 128 * 1024, 1, SPI_NOR_NO_ERASE) },
|
|
|
|
/* GigaDevice */
|
|
{ "gd25q32", INFO(0xc84016, 0, 64 * 1024, 64, SECT_4K) },
|
|
{ "gd25q64", INFO(0xc84017, 0, 64 * 1024, 128, SECT_4K) },
|
|
{ "gd25q128", INFO(0xc84018, 0, 64 * 1024, 256, SECT_4K) },
|
|
|
|
/* Intel/Numonyx -- xxxs33b */
|
|
{ "160s33b", INFO(0x898911, 0, 64 * 1024, 32, 0) },
|
|
{ "320s33b", INFO(0x898912, 0, 64 * 1024, 64, 0) },
|
|
{ "640s33b", INFO(0x898913, 0, 64 * 1024, 128, 0) },
|
|
|
|
/* ISSI */
|
|
{ "is25cd512", INFO(0x7f9d20, 0, 32 * 1024, 2, SECT_4K) },
|
|
|
|
/* Macronix */
|
|
{ "mx25l512e", INFO(0xc22010, 0, 64 * 1024, 1, SECT_4K) },
|
|
{ "mx25l2005a", INFO(0xc22012, 0, 64 * 1024, 4, SECT_4K) },
|
|
{ "mx25l4005a", INFO(0xc22013, 0, 64 * 1024, 8, SECT_4K) },
|
|
{ "mx25l8005", INFO(0xc22014, 0, 64 * 1024, 16, 0) },
|
|
{ "mx25l1606e", INFO(0xc22015, 0, 64 * 1024, 32, SECT_4K) },
|
|
{ "mx25l3205d", INFO(0xc22016, 0, 64 * 1024, 64, 0) },
|
|
{ "mx25l3255e", INFO(0xc29e16, 0, 64 * 1024, 64, SECT_4K) },
|
|
{ "mx25l6405d", INFO(0xc22017, 0, 64 * 1024, 128, 0) },
|
|
{ "mx25u6435f", INFO(0xc22537, 0, 64 * 1024, 128, SECT_4K) },
|
|
{ "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, 0) },
|
|
{ "mx25l12855e", INFO(0xc22618, 0, 64 * 1024, 256, 0) },
|
|
{ "mx25l25635e", INFO(0xc22019, 0, 64 * 1024, 512, 0) },
|
|
{ "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
|
|
{ "mx66l51235l", INFO(0xc2201a, 0, 64 * 1024, 1024, SPI_NOR_QUAD_READ) },
|
|
{ "mx66l1g55g", INFO(0xc2261b, 0, 64 * 1024, 2048, SPI_NOR_QUAD_READ) },
|
|
|
|
/* Micron */
|
|
{ "n25q032", INFO(0x20ba16, 0, 64 * 1024, 64, SPI_NOR_QUAD_READ) },
|
|
{ "n25q064", INFO(0x20ba17, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_QUAD_READ) },
|
|
{ "n25q064a", INFO(0x20bb17, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_QUAD_READ) },
|
|
{ "n25q128a11", INFO(0x20bb18, 0, 64 * 1024, 256, SPI_NOR_QUAD_READ) },
|
|
{ "n25q128a13", INFO(0x20ba18, 0, 64 * 1024, 256, SPI_NOR_QUAD_READ) },
|
|
{ "n25q256a", INFO(0x20ba19, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_QUAD_READ) },
|
|
{ "n25q512a", INFO(0x20bb20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
|
|
{ "n25q512ax3", INFO(0x20ba20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
|
|
{ "n25q00", INFO(0x20ba21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
|
|
|
|
/* PMC */
|
|
{ "pm25lv512", INFO(0, 0, 32 * 1024, 2, SECT_4K_PMC) },
|
|
{ "pm25lv010", INFO(0, 0, 32 * 1024, 4, SECT_4K_PMC) },
|
|
{ "pm25lq032", INFO(0x7f9d46, 0, 64 * 1024, 64, SECT_4K) },
|
|
|
|
/* Spansion -- single (large) sector size only, at least
|
|
* for the chips listed here (without boot sectors).
|
|
*/
|
|
{ "s25sl032p", INFO(0x010215, 0x4d00, 64 * 1024, 64, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
|
|
{ "s25sl064p", INFO(0x010216, 0x4d00, 64 * 1024, 128, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
|
|
{ "s25fl256s0", INFO(0x010219, 0x4d00, 256 * 1024, 128, 0) },
|
|
{ "s25fl256s1", INFO(0x010219, 0x4d01, 64 * 1024, 512, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
|
|
{ "s25fl512s", INFO(0x010220, 0x4d00, 256 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
|
|
{ "s70fl01gs", INFO(0x010221, 0x4d00, 256 * 1024, 256, 0) },
|
|
{ "s25sl12800", INFO(0x012018, 0x0300, 256 * 1024, 64, 0) },
|
|
{ "s25sl12801", INFO(0x012018, 0x0301, 64 * 1024, 256, 0) },
|
|
{ "s25fl128s", INFO6(0x012018, 0x4d0180, 64 * 1024, 256, SECT_4K | SPI_NOR_QUAD_READ) },
|
|
{ "s25fl129p0", INFO(0x012018, 0x4d00, 256 * 1024, 64, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
|
|
{ "s25fl129p1", INFO(0x012018, 0x4d01, 64 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
|
|
{ "s25sl004a", INFO(0x010212, 0, 64 * 1024, 8, 0) },
|
|
{ "s25sl008a", INFO(0x010213, 0, 64 * 1024, 16, 0) },
|
|
{ "s25sl016a", INFO(0x010214, 0, 64 * 1024, 32, 0) },
|
|
{ "s25sl032a", INFO(0x010215, 0, 64 * 1024, 64, 0) },
|
|
{ "s25sl064a", INFO(0x010216, 0, 64 * 1024, 128, 0) },
|
|
{ "s25fl008k", INFO(0xef4014, 0, 64 * 1024, 16, SECT_4K) },
|
|
{ "s25fl016k", INFO(0xef4015, 0, 64 * 1024, 32, SECT_4K) },
|
|
{ "s25fl064k", INFO(0xef4017, 0, 64 * 1024, 128, SECT_4K) },
|
|
{ "s25fl132k", INFO(0x014016, 0, 64 * 1024, 64, SECT_4K) },
|
|
{ "s25fl164k", INFO(0x014017, 0, 64 * 1024, 128, SECT_4K) },
|
|
{ "s25fl204k", INFO(0x014013, 0, 64 * 1024, 8, SECT_4K) },
|
|
|
|
/* SST -- large erase sizes are "overlays", "sectors" are 4K */
|
|
{ "sst25vf040b", INFO(0xbf258d, 0, 64 * 1024, 8, SECT_4K | SST_WRITE) },
|
|
{ "sst25vf080b", INFO(0xbf258e, 0, 64 * 1024, 16, SECT_4K | SST_WRITE) },
|
|
{ "sst25vf016b", INFO(0xbf2541, 0, 64 * 1024, 32, SECT_4K | SST_WRITE) },
|
|
{ "sst25vf032b", INFO(0xbf254a, 0, 64 * 1024, 64, SECT_4K | SST_WRITE) },
|
|
{ "sst25vf064c", INFO(0xbf254b, 0, 64 * 1024, 128, SECT_4K) },
|
|
{ "sst25wf512", INFO(0xbf2501, 0, 64 * 1024, 1, SECT_4K | SST_WRITE) },
|
|
{ "sst25wf010", INFO(0xbf2502, 0, 64 * 1024, 2, SECT_4K | SST_WRITE) },
|
|
{ "sst25wf020", INFO(0xbf2503, 0, 64 * 1024, 4, SECT_4K | SST_WRITE) },
|
|
{ "sst25wf020a", INFO(0x621612, 0, 64 * 1024, 4, SECT_4K) },
|
|
{ "sst25wf040", INFO(0xbf2504, 0, 64 * 1024, 8, SECT_4K | SST_WRITE) },
|
|
{ "sst25wf080", INFO(0xbf2505, 0, 64 * 1024, 16, SECT_4K | SST_WRITE) },
|
|
|
|
/* ST Microelectronics -- newer production may have feature updates */
|
|
{ "m25p05", INFO(0x202010, 0, 32 * 1024, 2, 0) },
|
|
{ "m25p10", INFO(0x202011, 0, 32 * 1024, 4, 0) },
|
|
{ "m25p20", INFO(0x202012, 0, 64 * 1024, 4, 0) },
|
|
{ "m25p40", INFO(0x202013, 0, 64 * 1024, 8, 0) },
|
|
{ "m25p80", INFO(0x202014, 0, 64 * 1024, 16, 0) },
|
|
{ "m25p16", INFO(0x202015, 0, 64 * 1024, 32, 0) },
|
|
{ "m25p32", INFO(0x202016, 0, 64 * 1024, 64, 0) },
|
|
{ "m25p64", INFO(0x202017, 0, 64 * 1024, 128, 0) },
|
|
{ "m25p128", INFO(0x202018, 0, 256 * 1024, 64, 0) },
|
|
|
|
{ "m25p05-nonjedec", INFO(0, 0, 32 * 1024, 2, 0) },
|
|
{ "m25p10-nonjedec", INFO(0, 0, 32 * 1024, 4, 0) },
|
|
{ "m25p20-nonjedec", INFO(0, 0, 64 * 1024, 4, 0) },
|
|
{ "m25p40-nonjedec", INFO(0, 0, 64 * 1024, 8, 0) },
|
|
{ "m25p80-nonjedec", INFO(0, 0, 64 * 1024, 16, 0) },
|
|
{ "m25p16-nonjedec", INFO(0, 0, 64 * 1024, 32, 0) },
|
|
{ "m25p32-nonjedec", INFO(0, 0, 64 * 1024, 64, 0) },
|
|
{ "m25p64-nonjedec", INFO(0, 0, 64 * 1024, 128, 0) },
|
|
{ "m25p128-nonjedec", INFO(0, 0, 256 * 1024, 64, 0) },
|
|
|
|
{ "m45pe10", INFO(0x204011, 0, 64 * 1024, 2, 0) },
|
|
{ "m45pe80", INFO(0x204014, 0, 64 * 1024, 16, 0) },
|
|
{ "m45pe16", INFO(0x204015, 0, 64 * 1024, 32, 0) },
|
|
|
|
{ "m25pe20", INFO(0x208012, 0, 64 * 1024, 4, 0) },
|
|
{ "m25pe80", INFO(0x208014, 0, 64 * 1024, 16, 0) },
|
|
{ "m25pe16", INFO(0x208015, 0, 64 * 1024, 32, SECT_4K) },
|
|
|
|
{ "m25px16", INFO(0x207115, 0, 64 * 1024, 32, SECT_4K) },
|
|
{ "m25px32", INFO(0x207116, 0, 64 * 1024, 64, SECT_4K) },
|
|
{ "m25px32-s0", INFO(0x207316, 0, 64 * 1024, 64, SECT_4K) },
|
|
{ "m25px32-s1", INFO(0x206316, 0, 64 * 1024, 64, SECT_4K) },
|
|
{ "m25px64", INFO(0x207117, 0, 64 * 1024, 128, 0) },
|
|
{ "m25px80", INFO(0x207114, 0, 64 * 1024, 16, 0) },
|
|
|
|
/* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */
|
|
{ "w25x05", INFO(0xef3010, 0, 64 * 1024, 1, SECT_4K) },
|
|
{ "w25x10", INFO(0xef3011, 0, 64 * 1024, 2, SECT_4K) },
|
|
{ "w25x20", INFO(0xef3012, 0, 64 * 1024, 4, SECT_4K) },
|
|
{ "w25x40", INFO(0xef3013, 0, 64 * 1024, 8, SECT_4K) },
|
|
{ "w25x80", INFO(0xef3014, 0, 64 * 1024, 16, SECT_4K) },
|
|
{ "w25x16", INFO(0xef3015, 0, 64 * 1024, 32, SECT_4K) },
|
|
{ "w25x32", INFO(0xef3016, 0, 64 * 1024, 64, SECT_4K) },
|
|
{ "w25q32", INFO(0xef4016, 0, 64 * 1024, 64, SECT_4K) },
|
|
{ "w25q32dw", INFO(0xef6016, 0, 64 * 1024, 64, SECT_4K) },
|
|
{ "w25x64", INFO(0xef3017, 0, 64 * 1024, 128, SECT_4K) },
|
|
{ "w25q64", INFO(0xef4017, 0, 64 * 1024, 128, SECT_4K) },
|
|
{ "w25q64dw", INFO(0xef6017, 0, 64 * 1024, 128, SECT_4K) },
|
|
{ "w25q80", INFO(0xef5014, 0, 64 * 1024, 16, SECT_4K) },
|
|
{ "w25q80bl", INFO(0xef4014, 0, 64 * 1024, 16, SECT_4K) },
|
|
{ "w25q128", INFO(0xef4018, 0, 64 * 1024, 256, SECT_4K) },
|
|
{ "w25q256", INFO(0xef4019, 0, 64 * 1024, 512, SECT_4K) },
|
|
|
|
/* Catalyst / On Semiconductor -- non-JEDEC */
|
|
{ "cat25c11", CAT25_INFO( 16, 8, 16, 1, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
|
|
{ "cat25c03", CAT25_INFO( 32, 8, 16, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
|
|
{ "cat25c09", CAT25_INFO( 128, 8, 32, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
|
|
{ "cat25c17", CAT25_INFO( 256, 8, 32, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
|
|
{ "cat25128", CAT25_INFO(2048, 8, 64, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
|
|
{ },
|
|
};
|
|
|
|
static const struct flash_info *spi_nor_read_id(struct spi_nor *nor)
|
|
{
|
|
int tmp;
|
|
u8 id[SPI_NOR_MAX_ID_LEN];
|
|
const struct flash_info *info;
|
|
|
|
tmp = nor->read_reg(nor, SPINOR_OP_RDID, id, SPI_NOR_MAX_ID_LEN);
|
|
if (tmp < 0) {
|
|
dev_dbg(nor->dev, " error %d reading JEDEC ID\n", tmp);
|
|
return ERR_PTR(tmp);
|
|
}
|
|
|
|
for (tmp = 0; tmp < ARRAY_SIZE(spi_nor_ids) - 1; tmp++) {
|
|
info = &spi_nor_ids[tmp];
|
|
if (info->id_len) {
|
|
if (!memcmp(info->id, id, info->id_len))
|
|
return &spi_nor_ids[tmp];
|
|
}
|
|
}
|
|
dev_err(nor->dev, "unrecognized JEDEC id bytes: %02x, %2x, %2x\n",
|
|
id[0], id[1], id[2]);
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
|
|
size_t *retlen, u_char *buf)
|
|
{
|
|
struct spi_nor *nor = mtd_to_spi_nor(mtd);
|
|
int ret;
|
|
|
|
dev_dbg(nor->dev, "from 0x%08x, len %zd\n", (u32)from, len);
|
|
|
|
ret = spi_nor_lock_and_prep(nor, SPI_NOR_OPS_READ);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = nor->read(nor, from, len, retlen, buf);
|
|
|
|
spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_READ);
|
|
return ret;
|
|
}
|
|
|
|
static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
|
|
size_t *retlen, const u_char *buf)
|
|
{
|
|
struct spi_nor *nor = mtd_to_spi_nor(mtd);
|
|
size_t actual;
|
|
int ret;
|
|
|
|
dev_dbg(nor->dev, "to 0x%08x, len %zd\n", (u32)to, len);
|
|
|
|
ret = spi_nor_lock_and_prep(nor, SPI_NOR_OPS_WRITE);
|
|
if (ret)
|
|
return ret;
|
|
|
|
write_enable(nor);
|
|
|
|
nor->sst_write_second = false;
|
|
|
|
actual = to % 2;
|
|
/* Start write from odd address. */
|
|
if (actual) {
|
|
nor->program_opcode = SPINOR_OP_BP;
|
|
|
|
/* write one byte. */
|
|
nor->write(nor, to, 1, retlen, buf);
|
|
ret = spi_nor_wait_till_ready(nor);
|
|
if (ret)
|
|
goto time_out;
|
|
}
|
|
to += actual;
|
|
|
|
/* Write out most of the data here. */
|
|
for (; actual < len - 1; actual += 2) {
|
|
nor->program_opcode = SPINOR_OP_AAI_WP;
|
|
|
|
/* write two bytes. */
|
|
nor->write(nor, to, 2, retlen, buf + actual);
|
|
ret = spi_nor_wait_till_ready(nor);
|
|
if (ret)
|
|
goto time_out;
|
|
to += 2;
|
|
nor->sst_write_second = true;
|
|
}
|
|
nor->sst_write_second = false;
|
|
|
|
write_disable(nor);
|
|
ret = spi_nor_wait_till_ready(nor);
|
|
if (ret)
|
|
goto time_out;
|
|
|
|
/* Write out trailing byte if it exists. */
|
|
if (actual != len) {
|
|
write_enable(nor);
|
|
|
|
nor->program_opcode = SPINOR_OP_BP;
|
|
nor->write(nor, to, 1, retlen, buf + actual);
|
|
|
|
ret = spi_nor_wait_till_ready(nor);
|
|
if (ret)
|
|
goto time_out;
|
|
write_disable(nor);
|
|
}
|
|
time_out:
|
|
spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_WRITE);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Write an address range to the nor chip. Data must be written in
|
|
* FLASH_PAGESIZE chunks. The address range may be any size provided
|
|
* it is within the physical boundaries.
|
|
*/
|
|
static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
|
|
size_t *retlen, const u_char *buf)
|
|
{
|
|
struct spi_nor *nor = mtd_to_spi_nor(mtd);
|
|
u32 page_offset, page_size, i;
|
|
int ret;
|
|
|
|
dev_dbg(nor->dev, "to 0x%08x, len %zd\n", (u32)to, len);
|
|
|
|
ret = spi_nor_lock_and_prep(nor, SPI_NOR_OPS_WRITE);
|
|
if (ret)
|
|
return ret;
|
|
|
|
write_enable(nor);
|
|
|
|
page_offset = to & (nor->page_size - 1);
|
|
|
|
/* do all the bytes fit onto one page? */
|
|
if (page_offset + len <= nor->page_size) {
|
|
nor->write(nor, to, len, retlen, buf);
|
|
} else {
|
|
/* the size of data remaining on the first page */
|
|
page_size = nor->page_size - page_offset;
|
|
nor->write(nor, to, page_size, retlen, buf);
|
|
|
|
/* write everything in nor->page_size chunks */
|
|
for (i = page_size; i < len; i += page_size) {
|
|
page_size = len - i;
|
|
if (page_size > nor->page_size)
|
|
page_size = nor->page_size;
|
|
|
|
ret = spi_nor_wait_till_ready(nor);
|
|
if (ret)
|
|
goto write_err;
|
|
|
|
write_enable(nor);
|
|
|
|
nor->write(nor, to + i, page_size, retlen, buf + i);
|
|
}
|
|
}
|
|
|
|
ret = spi_nor_wait_till_ready(nor);
|
|
write_err:
|
|
spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_WRITE);
|
|
return ret;
|
|
}
|
|
|
|
static int macronix_quad_enable(struct spi_nor *nor)
|
|
{
|
|
int ret, val;
|
|
|
|
val = read_sr(nor);
|
|
write_enable(nor);
|
|
|
|
nor->cmd_buf[0] = val | SR_QUAD_EN_MX;
|
|
nor->write_reg(nor, SPINOR_OP_WRSR, nor->cmd_buf, 1, 0);
|
|
|
|
if (spi_nor_wait_till_ready(nor))
|
|
return 1;
|
|
|
|
ret = read_sr(nor);
|
|
if (!(ret > 0 && (ret & SR_QUAD_EN_MX))) {
|
|
dev_err(nor->dev, "Macronix Quad bit not set\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Write status Register and configuration register with 2 bytes
|
|
* The first byte will be written to the status register, while the
|
|
* second byte will be written to the configuration register.
|
|
* Return negative if error occured.
|
|
*/
|
|
static int write_sr_cr(struct spi_nor *nor, u16 val)
|
|
{
|
|
nor->cmd_buf[0] = val & 0xff;
|
|
nor->cmd_buf[1] = (val >> 8);
|
|
|
|
return nor->write_reg(nor, SPINOR_OP_WRSR, nor->cmd_buf, 2, 0);
|
|
}
|
|
|
|
static int spansion_quad_enable(struct spi_nor *nor)
|
|
{
|
|
int ret;
|
|
int quad_en = CR_QUAD_EN_SPAN << 8;
|
|
|
|
write_enable(nor);
|
|
|
|
ret = write_sr_cr(nor, quad_en);
|
|
if (ret < 0) {
|
|
dev_err(nor->dev,
|
|
"error while writing configuration register\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* read back and check it */
|
|
ret = read_cr(nor);
|
|
if (!(ret > 0 && (ret & CR_QUAD_EN_SPAN))) {
|
|
dev_err(nor->dev, "Spansion Quad bit not set\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int micron_quad_enable(struct spi_nor *nor)
|
|
{
|
|
int ret;
|
|
u8 val;
|
|
|
|
ret = nor->read_reg(nor, SPINOR_OP_RD_EVCR, &val, 1);
|
|
if (ret < 0) {
|
|
dev_err(nor->dev, "error %d reading EVCR\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
write_enable(nor);
|
|
|
|
/* set EVCR, enable quad I/O */
|
|
nor->cmd_buf[0] = val & ~EVCR_QUAD_EN_MICRON;
|
|
ret = nor->write_reg(nor, SPINOR_OP_WD_EVCR, nor->cmd_buf, 1, 0);
|
|
if (ret < 0) {
|
|
dev_err(nor->dev, "error while writing EVCR register\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = spi_nor_wait_till_ready(nor);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* read EVCR and check it */
|
|
ret = nor->read_reg(nor, SPINOR_OP_RD_EVCR, &val, 1);
|
|
if (ret < 0) {
|
|
dev_err(nor->dev, "error %d reading EVCR\n", ret);
|
|
return ret;
|
|
}
|
|
if (val & EVCR_QUAD_EN_MICRON) {
|
|
dev_err(nor->dev, "Micron EVCR Quad bit not clear\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int set_quad_mode(struct spi_nor *nor, const struct flash_info *info)
|
|
{
|
|
int status;
|
|
|
|
switch (JEDEC_MFR(info)) {
|
|
case CFI_MFR_MACRONIX:
|
|
status = macronix_quad_enable(nor);
|
|
if (status) {
|
|
dev_err(nor->dev, "Macronix quad-read not enabled\n");
|
|
return -EINVAL;
|
|
}
|
|
return status;
|
|
case CFI_MFR_ST:
|
|
status = micron_quad_enable(nor);
|
|
if (status) {
|
|
dev_err(nor->dev, "Micron quad-read not enabled\n");
|
|
return -EINVAL;
|
|
}
|
|
return status;
|
|
default:
|
|
status = spansion_quad_enable(nor);
|
|
if (status) {
|
|
dev_err(nor->dev, "Spansion quad-read not enabled\n");
|
|
return -EINVAL;
|
|
}
|
|
return status;
|
|
}
|
|
}
|
|
|
|
static int spi_nor_check(struct spi_nor *nor)
|
|
{
|
|
if (!nor->dev || !nor->read || !nor->write ||
|
|
!nor->read_reg || !nor->write_reg || !nor->erase) {
|
|
pr_err("spi-nor: please fill all the necessary fields!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
|
|
{
|
|
const struct flash_info *info = NULL;
|
|
struct device *dev = nor->dev;
|
|
struct mtd_info *mtd = nor->mtd;
|
|
struct device_node *np = dev->of_node;
|
|
int ret;
|
|
int i;
|
|
|
|
ret = spi_nor_check(nor);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (name)
|
|
info = spi_nor_match_id(name);
|
|
/* Try to auto-detect if chip name wasn't specified or not found */
|
|
if (!info)
|
|
info = spi_nor_read_id(nor);
|
|
if (IS_ERR_OR_NULL(info))
|
|
return -ENOENT;
|
|
|
|
/*
|
|
* If caller has specified name of flash model that can normally be
|
|
* detected using JEDEC, let's verify it.
|
|
*/
|
|
if (name && info->id_len) {
|
|
const struct flash_info *jinfo;
|
|
|
|
jinfo = spi_nor_read_id(nor);
|
|
if (IS_ERR(jinfo)) {
|
|
return PTR_ERR(jinfo);
|
|
} else if (jinfo != info) {
|
|
/*
|
|
* JEDEC knows better, so overwrite platform ID. We
|
|
* can't trust partitions any longer, but we'll let
|
|
* mtd apply them anyway, since some partitions may be
|
|
* marked read-only, and we don't want to lose that
|
|
* information, even if it's not 100% accurate.
|
|
*/
|
|
dev_warn(dev, "found %s, expected %s\n",
|
|
jinfo->name, info->name);
|
|
info = jinfo;
|
|
}
|
|
}
|
|
|
|
mutex_init(&nor->lock);
|
|
|
|
/*
|
|
* Atmel, SST and Intel/Numonyx serial nor tend to power
|
|
* up with the software protection bits set
|
|
*/
|
|
|
|
if (JEDEC_MFR(info) == CFI_MFR_ATMEL ||
|
|
JEDEC_MFR(info) == CFI_MFR_INTEL ||
|
|
JEDEC_MFR(info) == CFI_MFR_SST) {
|
|
write_enable(nor);
|
|
write_sr(nor, 0);
|
|
}
|
|
|
|
if (!mtd->name)
|
|
mtd->name = dev_name(dev);
|
|
mtd->type = MTD_NORFLASH;
|
|
mtd->writesize = 1;
|
|
mtd->flags = MTD_CAP_NORFLASH;
|
|
mtd->size = info->sector_size * info->n_sectors;
|
|
mtd->_erase = spi_nor_erase;
|
|
mtd->_read = spi_nor_read;
|
|
|
|
/* nor protection support for STmicro chips */
|
|
if (JEDEC_MFR(info) == CFI_MFR_ST) {
|
|
nor->flash_lock = stm_lock;
|
|
nor->flash_unlock = stm_unlock;
|
|
}
|
|
|
|
if (nor->flash_lock && nor->flash_unlock) {
|
|
mtd->_lock = spi_nor_lock;
|
|
mtd->_unlock = spi_nor_unlock;
|
|
}
|
|
|
|
/* sst nor chips use AAI word program */
|
|
if (info->flags & SST_WRITE)
|
|
mtd->_write = sst_write;
|
|
else
|
|
mtd->_write = spi_nor_write;
|
|
|
|
if (info->flags & USE_FSR)
|
|
nor->flags |= SNOR_F_USE_FSR;
|
|
|
|
#ifdef CONFIG_MTD_SPI_NOR_USE_4K_SECTORS
|
|
/* prefer "small sector" erase if possible */
|
|
if (info->flags & SECT_4K) {
|
|
nor->erase_opcode = SPINOR_OP_BE_4K;
|
|
mtd->erasesize = 4096;
|
|
} else if (info->flags & SECT_4K_PMC) {
|
|
nor->erase_opcode = SPINOR_OP_BE_4K_PMC;
|
|
mtd->erasesize = 4096;
|
|
} else
|
|
#endif
|
|
{
|
|
nor->erase_opcode = SPINOR_OP_SE;
|
|
mtd->erasesize = info->sector_size;
|
|
}
|
|
|
|
if (info->flags & SPI_NOR_NO_ERASE)
|
|
mtd->flags |= MTD_NO_ERASE;
|
|
|
|
mtd->dev.parent = dev;
|
|
nor->page_size = info->page_size;
|
|
mtd->writebufsize = nor->page_size;
|
|
|
|
if (np) {
|
|
/* If we were instantiated by DT, use it */
|
|
if (of_property_read_bool(np, "m25p,fast-read"))
|
|
nor->flash_read = SPI_NOR_FAST;
|
|
else
|
|
nor->flash_read = SPI_NOR_NORMAL;
|
|
} else {
|
|
/* If we weren't instantiated by DT, default to fast-read */
|
|
nor->flash_read = SPI_NOR_FAST;
|
|
}
|
|
|
|
/* Some devices cannot do fast-read, no matter what DT tells us */
|
|
if (info->flags & SPI_NOR_NO_FR)
|
|
nor->flash_read = SPI_NOR_NORMAL;
|
|
|
|
/* Quad/Dual-read mode takes precedence over fast/normal */
|
|
if (mode == SPI_NOR_QUAD && info->flags & SPI_NOR_QUAD_READ) {
|
|
ret = set_quad_mode(nor, info);
|
|
if (ret) {
|
|
dev_err(dev, "quad mode not supported\n");
|
|
return ret;
|
|
}
|
|
nor->flash_read = SPI_NOR_QUAD;
|
|
} else if (mode == SPI_NOR_DUAL && info->flags & SPI_NOR_DUAL_READ) {
|
|
nor->flash_read = SPI_NOR_DUAL;
|
|
}
|
|
|
|
/* Default commands */
|
|
switch (nor->flash_read) {
|
|
case SPI_NOR_QUAD:
|
|
nor->read_opcode = SPINOR_OP_READ_1_1_4;
|
|
break;
|
|
case SPI_NOR_DUAL:
|
|
nor->read_opcode = SPINOR_OP_READ_1_1_2;
|
|
break;
|
|
case SPI_NOR_FAST:
|
|
nor->read_opcode = SPINOR_OP_READ_FAST;
|
|
break;
|
|
case SPI_NOR_NORMAL:
|
|
nor->read_opcode = SPINOR_OP_READ;
|
|
break;
|
|
default:
|
|
dev_err(dev, "No Read opcode defined\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
nor->program_opcode = SPINOR_OP_PP;
|
|
|
|
if (info->addr_width)
|
|
nor->addr_width = info->addr_width;
|
|
else if (mtd->size > 0x1000000) {
|
|
/* enable 4-byte addressing if the device exceeds 16MiB */
|
|
nor->addr_width = 4;
|
|
if (JEDEC_MFR(info) == CFI_MFR_AMD) {
|
|
/* Dedicated 4-byte command set */
|
|
switch (nor->flash_read) {
|
|
case SPI_NOR_QUAD:
|
|
nor->read_opcode = SPINOR_OP_READ4_1_1_4;
|
|
break;
|
|
case SPI_NOR_DUAL:
|
|
nor->read_opcode = SPINOR_OP_READ4_1_1_2;
|
|
break;
|
|
case SPI_NOR_FAST:
|
|
nor->read_opcode = SPINOR_OP_READ4_FAST;
|
|
break;
|
|
case SPI_NOR_NORMAL:
|
|
nor->read_opcode = SPINOR_OP_READ4;
|
|
break;
|
|
}
|
|
nor->program_opcode = SPINOR_OP_PP_4B;
|
|
/* No small sector erase for 4-byte command set */
|
|
nor->erase_opcode = SPINOR_OP_SE_4B;
|
|
mtd->erasesize = info->sector_size;
|
|
} else
|
|
set_4byte(nor, info, 1);
|
|
} else {
|
|
nor->addr_width = 3;
|
|
}
|
|
|
|
nor->read_dummy = spi_nor_read_dummy_cycles(nor);
|
|
|
|
dev_info(dev, "%s (%lld Kbytes)\n", info->name,
|
|
(long long)mtd->size >> 10);
|
|
|
|
dev_dbg(dev,
|
|
"mtd .name = %s, .size = 0x%llx (%lldMiB), "
|
|
".erasesize = 0x%.8x (%uKiB) .numeraseregions = %d\n",
|
|
mtd->name, (long long)mtd->size, (long long)(mtd->size >> 20),
|
|
mtd->erasesize, mtd->erasesize / 1024, mtd->numeraseregions);
|
|
|
|
if (mtd->numeraseregions)
|
|
for (i = 0; i < mtd->numeraseregions; i++)
|
|
dev_dbg(dev,
|
|
"mtd.eraseregions[%d] = { .offset = 0x%llx, "
|
|
".erasesize = 0x%.8x (%uKiB), "
|
|
".numblocks = %d }\n",
|
|
i, (long long)mtd->eraseregions[i].offset,
|
|
mtd->eraseregions[i].erasesize,
|
|
mtd->eraseregions[i].erasesize / 1024,
|
|
mtd->eraseregions[i].numblocks);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(spi_nor_scan);
|
|
|
|
static const struct flash_info *spi_nor_match_id(const char *name)
|
|
{
|
|
const struct flash_info *id = spi_nor_ids;
|
|
|
|
while (id->name) {
|
|
if (!strcmp(name, id->name))
|
|
return id;
|
|
id++;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Huang Shijie <shijie8@gmail.com>");
|
|
MODULE_AUTHOR("Mike Lavender");
|
|
MODULE_DESCRIPTION("framework for SPI NOR");
|