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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/mtd/spi-nor/spi-nor.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/mtd/spi-nor/spi-nor.c')
-rw-r--r--kernel/drivers/mtd/spi-nor/spi-nor.c1225
1 files changed, 1225 insertions, 0 deletions
diff --git a/kernel/drivers/mtd/spi-nor/spi-nor.c b/kernel/drivers/mtd/spi-nor/spi-nor.c
new file mode 100644
index 000000000..14a5d2325
--- /dev/null
+++ b/kernel/drivers/mtd/spi-nor/spi-nor.c
@@ -0,0 +1,1225 @@
+/*
+ * Based on m25p80.c, by Mike Lavender (mike@steroidmicros.com), with
+ * influence from lart.c (Abraham Van Der Merwe) and mtd_dataflash.c
+ *
+ * Copyright (C) 2005, Intec Automation Inc.
+ * Copyright (C) 2014, Freescale Semiconductor, Inc.
+ *
+ * This code is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/math64.h>
+
+#include <linux/mtd/cfi.h>
+#include <linux/mtd/mtd.h>
+#include <linux/of_platform.h>
+#include <linux/spi/flash.h>
+#include <linux/mtd/spi-nor.h>
+
+/* Define max times to check status register before we give up. */
+#define MAX_READY_WAIT_JIFFIES (40 * HZ) /* M25P16 specs 40s max chip erase */
+
+#define SPI_NOR_MAX_ID_LEN 6
+
+struct flash_info {
+ /*
+ * This array stores the ID bytes.
+ * The first three bytes are the JEDIC ID.
+ * JEDEC ID zero means "no ID" (mostly older chips).
+ */
+ u8 id[SPI_NOR_MAX_ID_LEN];
+ u8 id_len;
+
+ /* The size listed here is what works with SPINOR_OP_SE, which isn't
+ * necessarily called a "sector" by the vendor.
+ */
+ unsigned sector_size;
+ u16 n_sectors;
+
+ u16 page_size;
+ u16 addr_width;
+
+ u16 flags;
+#define SECT_4K 0x01 /* SPINOR_OP_BE_4K works uniformly */
+#define SPI_NOR_NO_ERASE 0x02 /* No erase command needed */
+#define SST_WRITE 0x04 /* use SST byte programming */
+#define SPI_NOR_NO_FR 0x08 /* Can't do fastread */
+#define SECT_4K_PMC 0x10 /* SPINOR_OP_BE_4K_PMC works uniformly */
+#define SPI_NOR_DUAL_READ 0x20 /* Flash supports Dual Read */
+#define SPI_NOR_QUAD_READ 0x40 /* Flash supports Quad Read */
+#define USE_FSR 0x80 /* use flag status register */
+};
+
+#define JEDEC_MFR(info) ((info)->id[0])
+
+static const struct spi_device_id *spi_nor_match_id(const char *name);
+
+/*
+ * Read the status register, returning its value in the location
+ * Return the status register value.
+ * Returns negative if error occurred.
+ */
+static int read_sr(struct spi_nor *nor)
+{
+ int ret;
+ u8 val;
+
+ ret = nor->read_reg(nor, SPINOR_OP_RDSR, &val, 1);
+ if (ret < 0) {
+ pr_err("error %d reading SR\n", (int) ret);
+ return ret;
+ }
+
+ return val;
+}
+
+/*
+ * Read the flag status register, returning its value in the location
+ * Return the status register value.
+ * Returns negative if error occurred.
+ */
+static int read_fsr(struct spi_nor *nor)
+{
+ int ret;
+ u8 val;
+
+ ret = nor->read_reg(nor, SPINOR_OP_RDFSR, &val, 1);
+ if (ret < 0) {
+ pr_err("error %d reading FSR\n", ret);
+ return ret;
+ }
+
+ return val;
+}
+
+/*
+ * Read configuration register, returning its value in the
+ * location. Return the configuration register value.
+ * Returns negative if error occured.
+ */
+static int read_cr(struct spi_nor *nor)
+{
+ int ret;
+ u8 val;
+
+ ret = nor->read_reg(nor, SPINOR_OP_RDCR, &val, 1);
+ if (ret < 0) {
+ dev_err(nor->dev, "error %d reading CR\n", ret);
+ return ret;
+ }
+
+ return val;
+}
+
+/*
+ * Dummy Cycle calculation for different type of read.
+ * It can be used to support more commands with
+ * different dummy cycle requirements.
+ */
+static inline int spi_nor_read_dummy_cycles(struct spi_nor *nor)
+{
+ switch (nor->flash_read) {
+ case SPI_NOR_FAST:
+ case SPI_NOR_DUAL:
+ case SPI_NOR_QUAD:
+ return 8;
+ case SPI_NOR_NORMAL:
+ return 0;
+ }
+ return 0;
+}
+
+/*
+ * Write status register 1 byte
+ * Returns negative if error occurred.
+ */
+static inline int write_sr(struct spi_nor *nor, u8 val)
+{
+ nor->cmd_buf[0] = val;
+ return nor->write_reg(nor, SPINOR_OP_WRSR, nor->cmd_buf, 1, 0);
+}
+
+/*
+ * Set write enable latch with Write Enable command.
+ * Returns negative if error occurred.
+ */
+static inline int write_enable(struct spi_nor *nor)
+{
+ return nor->write_reg(nor, SPINOR_OP_WREN, NULL, 0, 0);
+}
+
+/*
+ * Send write disble instruction to the chip.
+ */
+static inline int write_disable(struct spi_nor *nor)
+{
+ return nor->write_reg(nor, SPINOR_OP_WRDI, NULL, 0, 0);
+}
+
+static inline struct spi_nor *mtd_to_spi_nor(struct mtd_info *mtd)
+{
+ return mtd->priv;
+}
+
+/* Enable/disable 4-byte addressing mode. */
+static inline int set_4byte(struct spi_nor *nor, struct flash_info *info,
+ int enable)
+{
+ int status;
+ bool need_wren = false;
+ u8 cmd;
+
+ switch (JEDEC_MFR(info)) {
+ case CFI_MFR_ST: /* Micron, actually */
+ /* Some Micron need WREN command; all will accept it */
+ need_wren = true;
+ case CFI_MFR_MACRONIX:
+ case 0xEF /* winbond */:
+ if (need_wren)
+ write_enable(nor);
+
+ cmd = enable ? SPINOR_OP_EN4B : SPINOR_OP_EX4B;
+ status = nor->write_reg(nor, cmd, NULL, 0, 0);
+ if (need_wren)
+ write_disable(nor);
+
+ return status;
+ default:
+ /* Spansion style */
+ nor->cmd_buf[0] = enable << 7;
+ return nor->write_reg(nor, SPINOR_OP_BRWR, nor->cmd_buf, 1, 0);
+ }
+}
+static inline int spi_nor_sr_ready(struct spi_nor *nor)
+{
+ int sr = read_sr(nor);
+ if (sr < 0)
+ return sr;
+ else
+ return !(sr & SR_WIP);
+}
+
+static inline int spi_nor_fsr_ready(struct spi_nor *nor)
+{
+ int fsr = read_fsr(nor);
+ if (fsr < 0)
+ return fsr;
+ else
+ return fsr & FSR_READY;
+}
+
+static int spi_nor_ready(struct spi_nor *nor)
+{
+ int sr, fsr;
+ sr = spi_nor_sr_ready(nor);
+ if (sr < 0)
+ return sr;
+ fsr = nor->flags & SNOR_F_USE_FSR ? spi_nor_fsr_ready(nor) : 1;
+ if (fsr < 0)
+ return fsr;
+ return sr && fsr;
+}
+
+/*
+ * Service routine to read status register until ready, or timeout occurs.
+ * Returns non-zero if error.
+ */
+static int spi_nor_wait_till_ready(struct spi_nor *nor)
+{
+ unsigned long deadline;
+ int timeout = 0, ret;
+
+ deadline = jiffies + MAX_READY_WAIT_JIFFIES;
+
+ while (!timeout) {
+ if (time_after_eq(jiffies, deadline))
+ timeout = 1;
+
+ ret = spi_nor_ready(nor);
+ if (ret < 0)
+ return ret;
+ if (ret)
+ return 0;
+
+ cond_resched();
+ }
+
+ dev_err(nor->dev, "flash operation timed out\n");
+
+ return -ETIMEDOUT;
+}
+
+/*
+ * Erase the whole flash memory
+ *
+ * Returns 0 if successful, non-zero otherwise.
+ */
+static int erase_chip(struct spi_nor *nor)
+{
+ dev_dbg(nor->dev, " %lldKiB\n", (long long)(nor->mtd->size >> 10));
+
+ return nor->write_reg(nor, SPINOR_OP_CHIP_ERASE, NULL, 0, 0);
+}
+
+static int spi_nor_lock_and_prep(struct spi_nor *nor, enum spi_nor_ops ops)
+{
+ int ret = 0;
+
+ mutex_lock(&nor->lock);
+
+ if (nor->prepare) {
+ ret = nor->prepare(nor, ops);
+ if (ret) {
+ dev_err(nor->dev, "failed in the preparation.\n");
+ mutex_unlock(&nor->lock);
+ return ret;
+ }
+ }
+ return ret;
+}
+
+static void spi_nor_unlock_and_unprep(struct spi_nor *nor, enum spi_nor_ops ops)
+{
+ if (nor->unprepare)
+ nor->unprepare(nor, ops);
+ mutex_unlock(&nor->lock);
+}
+
+/*
+ * Erase an address range on the nor chip. The address range may extend
+ * one or more erase sectors. Return an error is there is a problem erasing.
+ */
+static int spi_nor_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+ struct spi_nor *nor = mtd_to_spi_nor(mtd);
+ u32 addr, len;
+ uint32_t rem;
+ int ret;
+
+ dev_dbg(nor->dev, "at 0x%llx, len %lld\n", (long long)instr->addr,
+ (long long)instr->len);
+
+ div_u64_rem(instr->len, mtd->erasesize, &rem);
+ if (rem)
+ return -EINVAL;
+
+ addr = instr->addr;
+ len = instr->len;
+
+ ret = spi_nor_lock_and_prep(nor, SPI_NOR_OPS_ERASE);
+ if (ret)
+ return ret;
+
+ /* whole-chip erase? */
+ if (len == mtd->size) {
+ write_enable(nor);
+
+ if (erase_chip(nor)) {
+ ret = -EIO;
+ goto erase_err;
+ }
+
+ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto erase_err;
+
+ /* REVISIT in some cases we could speed up erasing large regions
+ * by using SPINOR_OP_SE instead of SPINOR_OP_BE_4K. We may have set up
+ * to use "small sector erase", but that's not always optimal.
+ */
+
+ /* "sector"-at-a-time erase */
+ } else {
+ while (len) {
+ write_enable(nor);
+
+ if (nor->erase(nor, addr)) {
+ ret = -EIO;
+ goto erase_err;
+ }
+
+ addr += mtd->erasesize;
+ len -= mtd->erasesize;
+
+ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto erase_err;
+ }
+ }
+
+ write_disable(nor);
+
+ spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_ERASE);
+
+ instr->state = MTD_ERASE_DONE;
+ mtd_erase_callback(instr);
+
+ return ret;
+
+erase_err:
+ spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_ERASE);
+ instr->state = MTD_ERASE_FAILED;
+ return ret;
+}
+
+static int stm_lock(struct spi_nor *nor, loff_t ofs, uint64_t len)
+{
+ struct mtd_info *mtd = nor->mtd;
+ uint32_t offset = ofs;
+ uint8_t status_old, status_new;
+ int ret = 0;
+
+ status_old = read_sr(nor);
+
+ if (offset < mtd->size - (mtd->size / 2))
+ status_new = status_old | SR_BP2 | SR_BP1 | SR_BP0;
+ else if (offset < mtd->size - (mtd->size / 4))
+ status_new = (status_old & ~SR_BP0) | SR_BP2 | SR_BP1;
+ else if (offset < mtd->size - (mtd->size / 8))
+ status_new = (status_old & ~SR_BP1) | SR_BP2 | SR_BP0;
+ else if (offset < mtd->size - (mtd->size / 16))
+ status_new = (status_old & ~(SR_BP0 | SR_BP1)) | SR_BP2;
+ else if (offset < mtd->size - (mtd->size / 32))
+ status_new = (status_old & ~SR_BP2) | SR_BP1 | SR_BP0;
+ else if (offset < mtd->size - (mtd->size / 64))
+ status_new = (status_old & ~(SR_BP2 | SR_BP0)) | SR_BP1;
+ else
+ status_new = (status_old & ~(SR_BP2 | SR_BP1)) | SR_BP0;
+
+ /* Only modify protection if it will not unlock other areas */
+ if ((status_new & (SR_BP2 | SR_BP1 | SR_BP0)) >
+ (status_old & (SR_BP2 | SR_BP1 | SR_BP0))) {
+ write_enable(nor);
+ ret = write_sr(nor, status_new);
+ }
+
+ return ret;
+}
+
+static int stm_unlock(struct spi_nor *nor, loff_t ofs, uint64_t len)
+{
+ struct mtd_info *mtd = nor->mtd;
+ uint32_t offset = ofs;
+ uint8_t status_old, status_new;
+ int ret = 0;
+
+ status_old = read_sr(nor);
+
+ if (offset+len > mtd->size - (mtd->size / 64))
+ status_new = status_old & ~(SR_BP2 | SR_BP1 | SR_BP0);
+ else if (offset+len > mtd->size - (mtd->size / 32))
+ status_new = (status_old & ~(SR_BP2 | SR_BP1)) | SR_BP0;
+ else if (offset+len > mtd->size - (mtd->size / 16))
+ status_new = (status_old & ~(SR_BP2 | SR_BP0)) | SR_BP1;
+ else if (offset+len > mtd->size - (mtd->size / 8))
+ status_new = (status_old & ~SR_BP2) | SR_BP1 | SR_BP0;
+ else if (offset+len > mtd->size - (mtd->size / 4))
+ status_new = (status_old & ~(SR_BP0 | SR_BP1)) | SR_BP2;
+ else if (offset+len > mtd->size - (mtd->size / 2))
+ status_new = (status_old & ~SR_BP1) | SR_BP2 | SR_BP0;
+ else
+ status_new = (status_old & ~SR_BP0) | SR_BP2 | SR_BP1;
+
+ /* Only modify protection if it will not lock other areas */
+ if ((status_new & (SR_BP2 | SR_BP1 | SR_BP0)) <
+ (status_old & (SR_BP2 | SR_BP1 | SR_BP0))) {
+ write_enable(nor);
+ ret = write_sr(nor, status_new);
+ }
+
+ return ret;
+}
+
+static int spi_nor_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ struct spi_nor *nor = mtd_to_spi_nor(mtd);
+ int ret;
+
+ ret = spi_nor_lock_and_prep(nor, SPI_NOR_OPS_LOCK);
+ if (ret)
+ return ret;
+
+ ret = nor->flash_lock(nor, ofs, len);
+
+ spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_UNLOCK);
+ return ret;
+}
+
+static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
+{
+ struct spi_nor *nor = mtd_to_spi_nor(mtd);
+ int ret;
+
+ ret = spi_nor_lock_and_prep(nor, SPI_NOR_OPS_UNLOCK);
+ if (ret)
+ return ret;
+
+ ret = nor->flash_unlock(nor, ofs, len);
+
+ spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_LOCK);
+ return ret;
+}
+
+/* Used when the "_ext_id" is two bytes at most */
+#define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
+ ((kernel_ulong_t)&(struct flash_info) { \
+ .id = { \
+ ((_jedec_id) >> 16) & 0xff, \
+ ((_jedec_id) >> 8) & 0xff, \
+ (_jedec_id) & 0xff, \
+ ((_ext_id) >> 8) & 0xff, \
+ (_ext_id) & 0xff, \
+ }, \
+ .id_len = (!(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))), \
+ .sector_size = (_sector_size), \
+ .n_sectors = (_n_sectors), \
+ .page_size = 256, \
+ .flags = (_flags), \
+ })
+
+#define INFO6(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
+ ((kernel_ulong_t)&(struct flash_info) { \
+ .id = { \
+ ((_jedec_id) >> 16) & 0xff, \
+ ((_jedec_id) >> 8) & 0xff, \
+ (_jedec_id) & 0xff, \
+ ((_ext_id) >> 16) & 0xff, \
+ ((_ext_id) >> 8) & 0xff, \
+ (_ext_id) & 0xff, \
+ }, \
+ .id_len = 6, \
+ .sector_size = (_sector_size), \
+ .n_sectors = (_n_sectors), \
+ .page_size = 256, \
+ .flags = (_flags), \
+ })
+
+#define CAT25_INFO(_sector_size, _n_sectors, _page_size, _addr_width, _flags) \
+ ((kernel_ulong_t)&(struct flash_info) { \
+ .sector_size = (_sector_size), \
+ .n_sectors = (_n_sectors), \
+ .page_size = (_page_size), \
+ .addr_width = (_addr_width), \
+ .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.
+ */
+static const struct spi_device_id 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, 0) },
+
+ /* 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) },
+
+ /* Macronix */
+ { "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, 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, 0) },
+ { "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, SPI_NOR_QUAD_READ) },
+ { "s25fl129p0", INFO(0x012018, 0x4d00, 256 * 1024, 64, 0) },
+ { "s25fl129p1", INFO(0x012018, 0x4d01, 64 * 1024, 256, 0) },
+ { "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, 0) },
+
+ /* 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) },
+ { "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 spi_device_id *spi_nor_read_id(struct spi_nor *nor)
+{
+ int tmp;
+ u8 id[SPI_NOR_MAX_ID_LEN];
+ 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 = (void *)spi_nor_ids[tmp].driver_data;
+ 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, 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 spi_device_id *id = NULL;
+ struct flash_info *info;
+ 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;
+
+ /* Try to auto-detect if chip name wasn't specified */
+ if (!name)
+ id = spi_nor_read_id(nor);
+ else
+ id = spi_nor_match_id(name);
+ if (IS_ERR_OR_NULL(id))
+ return -ENOENT;
+
+ info = (void *)id->driver_data;
+
+ /*
+ * 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 spi_device_id *jid;
+
+ jid = spi_nor_read_id(nor);
+ if (IS_ERR(jid)) {
+ return PTR_ERR(jid);
+ } else if (jid != id) {
+ /*
+ * 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",
+ jid->name, id->name);
+ id = jid;
+ info = (void *)jid->driver_data;
+ }
+ }
+
+ 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", id->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 spi_device_id *spi_nor_match_id(const char *name)
+{
+ const struct spi_device_id *id = spi_nor_ids;
+
+ while (id->name[0]) {
+ 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");