--- /dev/null
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+#include <linux/mtd/spi-nor.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/cfi.h>
+
+static const char * const probes[] = { "bcm47xxpart", NULL };
+
+struct bcm53xxsf {
+ struct spi_device *spi;
+ struct mtd_info mtd;
+ struct spi_nor nor;
+};
+
+/**************************************************
+ * spi-nor API
+ **************************************************/
+
+static int bcm53xxspiflash_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf,
+ int len)
+{
+ struct bcm53xxsf *b53sf = nor->priv;
+
+ return spi_write_then_read(b53sf->spi, &opcode, 1, buf, len);
+}
+
+static int bcm53xxspiflash_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf,
+ int len, int write_enable)
+{
+ struct bcm53xxsf *b53sf = nor->priv;
+ u8 *cmd = kzalloc(len + 1, GFP_KERNEL);
+ int err;
+
+ if (!cmd)
+ return -ENOMEM;
+
+ cmd[0] = opcode;
+ memcpy(&cmd[1], buf, len);
+ err = spi_write(b53sf->spi, cmd, len + 1);
+
+ kfree(cmd);
+
+ return err;
+}
+
+static int bcm53xxspiflash_read(struct spi_nor *nor, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ struct bcm53xxsf *b53sf = nor->priv;
+ struct spi_message m;
+ struct spi_transfer t[2] = { { 0 }, { 0 } };
+ unsigned char cmd[5];
+ int cmd_len = 0;
+ int err;
+
+ spi_message_init(&m);
+
+ cmd[cmd_len++] = SPINOR_OP_READ;
+ if (b53sf->mtd.size > 0x1000000)
+ cmd[cmd_len++] = (from & 0xFF000000) >> 24;
+ cmd[cmd_len++] = (from & 0x00FF0000) >> 16;
+ cmd[cmd_len++] = (from & 0x0000FF00) >> 8;
+ cmd[cmd_len++] = (from & 0x000000FF) >> 0;
+
+ t[0].tx_buf = cmd;
+ t[0].len = cmd_len;
+ spi_message_add_tail(&t[0], &m);
+
+ t[1].rx_buf = buf;
+ t[1].len = len;
+ spi_message_add_tail(&t[1], &m);
+
+ err = spi_sync(b53sf->spi, &m);
+ if (err)
+ return err;
+
+ if (retlen && m.actual_length > cmd_len)
+ *retlen = m.actual_length - cmd_len;
+
+ return 0;
+}
+
+static void bcm53xxspiflash_write(struct spi_nor *nor, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+{
+ struct bcm53xxsf *b53sf = nor->priv;
+ struct spi_message m;
+ struct spi_transfer t = { 0 };
+ u8 *cmd = kzalloc(len + 5, GFP_KERNEL);
+ int cmd_len = 0;
+ int err;
+
+ if (!cmd)
+ return;
+
+ spi_message_init(&m);
+
+ cmd[cmd_len++] = nor->program_opcode;
+ if (b53sf->mtd.size > 0x1000000)
+ cmd[cmd_len++] = (to & 0xFF000000) >> 24;
+ cmd[cmd_len++] = (to & 0x00FF0000) >> 16;
+ cmd[cmd_len++] = (to & 0x0000FF00) >> 8;
+ cmd[cmd_len++] = (to & 0x000000FF) >> 0;
+ memcpy(&cmd[cmd_len], buf, len);
+
+ t.tx_buf = cmd;
+ t.len = cmd_len + len;
+ spi_message_add_tail(&t, &m);
+
+ err = spi_sync(b53sf->spi, &m);
+ if (err)
+ goto out;
+
+ if (retlen && m.actual_length > cmd_len)
+ *retlen += m.actual_length - cmd_len;
+
+out:
+ kfree(cmd);
+}
+
+static int bcm53xxspiflash_erase(struct spi_nor *nor, loff_t offs)
+{
+ struct bcm53xxsf *b53sf = nor->priv;
+ unsigned char cmd[5];
+ int i;
+
+ i = 0;
+ cmd[i++] = nor->erase_opcode;
+ if (b53sf->mtd.size > 0x1000000)
+ cmd[i++] = (offs & 0xFF000000) >> 24;
+ cmd[i++] = ((offs & 0x00FF0000) >> 16);
+ cmd[i++] = ((offs & 0x0000FF00) >> 8);
+ cmd[i++] = ((offs & 0x000000FF) >> 0);
+
+ return spi_write(b53sf->spi, cmd, i);
+}
+
+static const char *bcm53xxspiflash_chip_name(struct spi_nor *nor)
+{
+ struct bcm53xxsf *b53sf = nor->priv;
+ struct device *dev = &b53sf->spi->dev;
+ unsigned char cmd[4];
+ unsigned char resp[2];
+ int err;
+
+ /* SST and Winbond/NexFlash specific command */
+ cmd[0] = 0x90; /* Read Manufacturer / Device ID */
+ cmd[1] = 0;
+ cmd[2] = 0;
+ cmd[3] = 0;
+ err = spi_write_then_read(b53sf->spi, cmd, 4, resp, 2);
+ if (err < 0) {
+ dev_err(dev, "error reading SPI flash id\n");
+ return ERR_PTR(-EBUSY);
+ }
+ switch (resp[0]) {
+ case 0xef: /* Winbond/NexFlash */
+ switch (resp[1]) {
+ case 0x17:
+ return "w25q128";
+ }
+ dev_err(dev, "Unknown Winbond/NexFlash flash: %02X %02X\n",
+ resp[0], resp[1]);
+ return NULL;
+ }
+
+ /* TODO: Try more ID commands */
+
+ return NULL;
+}
+
+/**************************************************
+ * SPI driver
+ **************************************************/
+
+static int bcm53xxspiflash_probe(struct spi_device *spi)
+{
+ struct bcm53xxsf *b53sf;
+ struct spi_nor *nor;
+ int err;
+
+ b53sf = devm_kzalloc(&spi->dev, sizeof(*b53sf), GFP_KERNEL);
+ if (!b53sf)
+ return -ENOMEM;
+ spi_set_drvdata(spi, b53sf);
+
+ nor = &b53sf->nor;
+ b53sf->spi = spi;
+ b53sf->mtd.priv = &b53sf->nor;
+
+ nor->mtd = &b53sf->mtd;
+ nor->dev = &spi->dev;
+ nor->read_reg = bcm53xxspiflash_read_reg;
+ nor->write_reg = bcm53xxspiflash_write_reg;
+ nor->read = bcm53xxspiflash_read;
+ nor->write = bcm53xxspiflash_write;
+ nor->erase = bcm53xxspiflash_erase;
+ nor->priv = b53sf;
+
+ err = spi_nor_scan(&b53sf->nor, bcm53xxspiflash_chip_name(nor),
+ SPI_NOR_NORMAL);
+ if (err)
+ return err;
+
+ err = mtd_device_parse_register(&b53sf->mtd, probes, NULL, NULL, 0);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int bcm53xxspiflash_remove(struct spi_device *spi)
+{
+ return 0;
+}
+
+static struct spi_driver bcm53xxspiflash_driver = {
+ .driver = {
+ .name = "bcm53xxspiflash",
+ .owner = THIS_MODULE,
+ },
+ .probe = bcm53xxspiflash_probe,
+ .remove = bcm53xxspiflash_remove,
+};
+
+module_spi_driver(bcm53xxspiflash_driver);
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
-@@ -611,6 +611,7 @@ const struct spi_device_id spi_nor_ids[]
+@@ -28,6 +28,8 @@
+
+ #define JEDEC_MFR(_jedec_id) ((_jedec_id) >> 16)
+
++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.
+@@ -473,7 +475,7 @@ struct flash_info {
+ * more nor chips. This current list focusses on newer chips, which
+ * have been converging on command sets which including JEDEC ID.
+ */
+-const struct spi_device_id spi_nor_ids[] = {
++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) },
+@@ -611,6 +613,7 @@ const struct spi_device_id spi_nor_ids[]
{ "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) },
/* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */
{ "w25x10", INFO(0xef3011, 0, 64 * 1024, 2, SECT_4K) },
-@@ -623,7 +624,6 @@ const struct spi_device_id spi_nor_ids[]
+@@ -623,7 +626,6 @@ const struct spi_device_id spi_nor_ids[]
{ "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) },
{ "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) },
-@@ -671,11 +671,6 @@ static const struct spi_device_id *spi_n
+@@ -637,7 +639,6 @@ const struct spi_device_id spi_nor_ids[]
+ { "cat25128", CAT25_INFO(2048, 8, 64, 2, SPI_NOR_NO_ERASE | SPI_NOR_NO_FR) },
+ { },
+ };
+-EXPORT_SYMBOL_GPL(spi_nor_ids);
+
+ static const struct spi_device_id *spi_nor_read_id(struct spi_nor *nor)
+ {
+@@ -671,11 +672,6 @@ static const struct spi_device_id *spi_n
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)
{
-@@ -920,7 +915,6 @@ int spi_nor_scan(struct spi_nor *nor, co
- enum read_mode mode)
+@@ -916,11 +912,10 @@ static int spi_nor_check(struct spi_nor
+ return 0;
+ }
+
+-int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
+- enum read_mode mode)
++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 flash_platform_data *data;
struct device *dev = nor->dev;
struct mtd_info *mtd = nor->mtd;
struct device_node *np = dev->of_node;
-@@ -931,34 +925,12 @@ int spi_nor_scan(struct spi_nor *nor, co
+@@ -931,34 +926,16 @@ int spi_nor_scan(struct spi_nor *nor, co
if (ret)
return ret;
- else
- dev_warn(dev, "unrecognized id %s\n", data->type);
- }
--
++ id = spi_nor_match_id(name);
++ if (!id)
++ return -ENOENT;
+
info = (void *)id->driver_data;
if (info->jedec_id) {
if (IS_ERR(jid)) {
return PTR_ERR(jid);
} else if (jid != id) {
-@@ -990,11 +962,8 @@ int spi_nor_scan(struct spi_nor *nor, co
+@@ -990,11 +967,8 @@ int spi_nor_scan(struct spi_nor *nor, co
write_sr(nor, 0);
}
mtd->type = MTD_NORFLASH;
mtd->writesize = 1;
mtd->flags = MTD_CAP_NORFLASH;
-@@ -1018,6 +987,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+@@ -1018,6 +992,7 @@ int spi_nor_scan(struct spi_nor *nor, co
nor->wait_till_ready == spi_nor_wait_till_ready)
nor->wait_till_ready = spi_nor_wait_till_fsr_ready;
/* prefer "small sector" erase if possible */
if (info->flags & SECT_4K) {
nor->erase_opcode = SPINOR_OP_BE_4K;
-@@ -1025,7 +995,9 @@ int spi_nor_scan(struct spi_nor *nor, co
+@@ -1025,7 +1000,9 @@ int spi_nor_scan(struct spi_nor *nor, co
} else if (info->flags & SECT_4K_PMC) {
nor->erase_opcode = SPINOR_OP_BE_4K_PMC;
mtd->erasesize = 4096;
nor->erase_opcode = SPINOR_OP_SE;
mtd->erasesize = info->sector_size;
}
+@@ -1141,7 +1118,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+ }
+ EXPORT_SYMBOL_GPL(spi_nor_scan);
+
+-const struct spi_device_id *spi_nor_match_id(char *name)
++static const struct spi_device_id *spi_nor_match_id(const char *name)
+ {
+ const struct spi_device_id *id = spi_nor_ids;
+
+@@ -1152,7 +1129,6 @@ const struct spi_device_id *spi_nor_matc
+ }
+ return NULL;
+ }
+-EXPORT_SYMBOL_GPL(spi_nor_match_id);
+
+ MODULE_LICENSE("GPL");
+ MODULE_AUTHOR("Huang Shijie <shijie8@gmail.com>");
--- a/drivers/mtd/spi-nor/Kconfig
+++ b/drivers/mtd/spi-nor/Kconfig
@@ -7,6 +7,20 @@ menuconfig MTD_SPI_NOR
config SPI_FSL_QUADSPI
tristate "Freescale Quad SPI controller"
depends on ARCH_MXC
+--- a/include/linux/mtd/spi-nor.h
++++ b/include/linux/mtd/spi-nor.h
+@@ -187,32 +187,17 @@ struct spi_nor {
+ /**
+ * spi_nor_scan() - scan the SPI NOR
+ * @nor: the spi_nor structure
+- * @id: the spi_device_id provided by the driver
++ * @name: the chip type name
+ * @mode: the read mode supported by the driver
+ *
+ * The drivers can use this fuction to scan the SPI NOR.
+ * In the scanning, it will try to get all the necessary information to
+ * fill the mtd_info{} and the spi_nor{}.
+ *
+- * The board may assigns a spi_device_id with @id which be used to compared with
+- * the spi_device_id detected by the scanning.
++ * The chip type name can be provided through the @name parameter.
+ *
+ * Return: 0 for success, others for failure.
+ */
+-int spi_nor_scan(struct spi_nor *nor, const struct spi_device_id *id,
+- enum read_mode mode);
+-extern const struct spi_device_id spi_nor_ids[];
+-
+-/**
+- * spi_nor_match_id() - find the spi_device_id by the name
+- * @name: the name of the spi_device_id
+- *
+- * The drivers use this function to find the spi_device_id
+- * specified by the @name.
+- *
+- * Return: returns the right spi_device_id pointer on success,
+- * and returns NULL on failure.
+- */
+-const struct spi_device_id *spi_nor_match_id(char *name);
++int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode);
+
+ #endif
--- /dev/null
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -26,7 +26,38 @@
+ /* 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 JEDEC_MFR(_jedec_id) ((_jedec_id) >> 16)
++#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);
+
+@@ -98,7 +129,7 @@ static inline int spi_nor_read_dummy_cyc
+ case SPI_NOR_FAST:
+ case SPI_NOR_DUAL:
+ case SPI_NOR_QUAD:
+- return 1;
++ return 8;
+ case SPI_NOR_NORMAL:
+ return 0;
+ }
+@@ -138,13 +169,14 @@ static inline struct spi_nor *mtd_to_spi
+ }
+
+ /* Enable/disable 4-byte addressing mode. */
+-static inline int set_4byte(struct spi_nor *nor, u32 jedec_id, int enable)
++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(jedec_id)) {
++ switch (JEDEC_MFR(info)) {
+ case CFI_MFR_ST: /* Micron, actually */
+ /* Some Micron need WREN command; all will accept it */
+ need_wren = true;
+@@ -165,81 +197,74 @@ static inline int set_4byte(struct spi_n
+ return nor->write_reg(nor, SPINOR_OP_BRWR, nor->cmd_buf, 1, 0);
+ }
+ }
+-
+-static int spi_nor_wait_till_ready(struct spi_nor *nor)
++static inline int spi_nor_sr_ready(struct spi_nor *nor)
+ {
+- unsigned long deadline;
+- int sr;
+-
+- deadline = jiffies + MAX_READY_WAIT_JIFFIES;
+-
+- do {
+- cond_resched();
++ int sr = read_sr(nor);
++ if (sr < 0)
++ return sr;
++ else
++ return !(sr & SR_WIP);
++}
+
+- sr = read_sr(nor);
+- if (sr < 0)
+- break;
+- else if (!(sr & SR_WIP))
+- return 0;
+- } while (!time_after_eq(jiffies, deadline));
++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;
++}
+
+- return -ETIMEDOUT;
++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;
+ }
+
+-static int spi_nor_wait_till_fsr_ready(struct spi_nor *nor)
++/*
++ * 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 sr;
+- int fsr;
++ int timeout = 0, ret;
+
+ deadline = jiffies + MAX_READY_WAIT_JIFFIES;
+
+- do {
++ 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();
++ }
+
+- sr = read_sr(nor);
+- if (sr < 0) {
+- break;
+- } else if (!(sr & SR_WIP)) {
+- fsr = read_fsr(nor);
+- if (fsr < 0)
+- break;
+- if (fsr & FSR_READY)
+- return 0;
+- }
+- } while (!time_after_eq(jiffies, deadline));
++ dev_err(nor->dev, "flash operation timed out\n");
+
+ return -ETIMEDOUT;
+ }
+
+ /*
+- * Service routine to read status register until ready, or timeout occurs.
+- * Returns non-zero if error.
+- */
+-static int wait_till_ready(struct spi_nor *nor)
+-{
+- return nor->wait_till_ready(nor);
+-}
+-
+-/*
+ * Erase the whole flash memory
+ *
+ * Returns 0 if successful, non-zero otherwise.
+ */
+ static int erase_chip(struct spi_nor *nor)
+ {
+- int ret;
+-
+ dev_dbg(nor->dev, " %lldKiB\n", (long long)(nor->mtd->size >> 10));
+
+- /* Wait until finished previous write command. */
+- ret = wait_till_ready(nor);
+- if (ret)
+- return ret;
+-
+- /* Send write enable, then erase commands. */
+- write_enable(nor);
+-
+ return nor->write_reg(nor, SPINOR_OP_CHIP_ERASE, NULL, 0, 0);
+ }
+
+@@ -294,11 +319,17 @@ static int spi_nor_erase(struct mtd_info
+
+ /* 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.
+@@ -307,6 +338,8 @@ static int spi_nor_erase(struct mtd_info
+ /* "sector"-at-a-time erase */
+ } else {
+ while (len) {
++ write_enable(nor);
++
+ if (nor->erase(nor, addr)) {
+ ret = -EIO;
+ goto erase_err;
+@@ -314,9 +347,15 @@ static int spi_nor_erase(struct mtd_info
+
+ 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;
+@@ -341,11 +380,6 @@ static int spi_nor_lock(struct mtd_info
+ if (ret)
+ return ret;
+
+- /* Wait until finished previous command */
+- ret = wait_till_ready(nor);
+- if (ret)
+- goto err;
+-
+ status_old = read_sr(nor);
+
+ if (offset < mtd->size - (mtd->size / 2))
+@@ -388,11 +422,6 @@ static int spi_nor_unlock(struct mtd_inf
+ if (ret)
+ return ret;
+
+- /* Wait until finished previous command */
+- ret = wait_till_ready(nor);
+- if (ret)
+- goto err;
+-
+ status_old = read_sr(nor);
+
+ if (offset+len > mtd->size - (mtd->size / 64))
+@@ -424,38 +453,34 @@ err:
+ return ret;
+ }
+
+-struct flash_info {
+- /* JEDEC id zero means "no ID" (most older chips); otherwise it has
+- * a high byte of zero plus three data bytes: the manufacturer id,
+- * then a two byte device id.
+- */
+- u32 jedec_id;
+- u16 ext_id;
+-
+- /* 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 */
+-};
+-
++/* 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) { \
+- .jedec_id = (_jedec_id), \
+- .ext_id = (_ext_id), \
++ .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, \
+@@ -507,6 +532,9 @@ static const struct spi_device_id spi_no
+ { "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) },
+@@ -532,6 +560,7 @@ static const struct spi_device_id spi_no
+ { "mx66l1g55g", INFO(0xc2261b, 0, 64 * 1024, 2048, SPI_NOR_QUAD_READ) },
+
+ /* Micron */
++ { "n25q032", INFO(0x20ba16, 0, 64 * 1024, 64, 0) },
+ { "n25q064", INFO(0x20ba17, 0, 64 * 1024, 128, 0) },
+ { "n25q128a11", INFO(0x20bb18, 0, 64 * 1024, 256, 0) },
+ { "n25q128a13", INFO(0x20ba18, 0, 64 * 1024, 256, 0) },
+@@ -556,6 +585,7 @@ static const struct spi_device_id spi_no
+ { "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) },
+@@ -577,6 +607,7 @@ static const struct spi_device_id spi_no
+ { "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) },
+@@ -588,7 +619,6 @@ static const struct spi_device_id spi_no
+ { "m25p32", INFO(0x202016, 0, 64 * 1024, 64, 0) },
+ { "m25p64", INFO(0x202017, 0, 64 * 1024, 128, 0) },
+ { "m25p128", INFO(0x202018, 0, 256 * 1024, 64, 0) },
+- { "n25q032", INFO(0x20ba16, 0, 64 * 1024, 64, 0) },
+
+ { "m25p05-nonjedec", INFO(0, 0, 32 * 1024, 2, 0) },
+ { "m25p10-nonjedec", INFO(0, 0, 32 * 1024, 4, 0) },
+@@ -643,32 +673,24 @@ static const struct spi_device_id spi_no
+ static const struct spi_device_id *spi_nor_read_id(struct spi_nor *nor)
+ {
+ int tmp;
+- u8 id[5];
+- u32 jedec;
+- u16 ext_jedec;
++ u8 id[SPI_NOR_MAX_ID_LEN];
+ struct flash_info *info;
+
+- tmp = nor->read_reg(nor, SPINOR_OP_RDID, id, 5);
++ 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);
+ }
+- jedec = id[0];
+- jedec = jedec << 8;
+- jedec |= id[1];
+- jedec = jedec << 8;
+- jedec |= id[2];
+-
+- ext_jedec = id[3] << 8 | id[4];
+
+ for (tmp = 0; tmp < ARRAY_SIZE(spi_nor_ids) - 1; tmp++) {
+ info = (void *)spi_nor_ids[tmp].driver_data;
+- if (info->jedec_id == jedec) {
+- if (info->ext_id == 0 || info->ext_id == ext_jedec)
++ if (info->id_len) {
++ if (!memcmp(info->id, id, info->id_len))
+ return &spi_nor_ids[tmp];
+ }
+ }
+- dev_err(nor->dev, "unrecognized JEDEC id %06x\n", jedec);
++ dev_err(nor->dev, "unrecognized JEDEC id bytes: %02x, %2x, %2x\n",
++ id[0], id[1], id[2]);
+ return ERR_PTR(-ENODEV);
+ }
+
+@@ -703,11 +725,6 @@ static int sst_write(struct mtd_info *mt
+ if (ret)
+ return ret;
+
+- /* Wait until finished previous write command. */
+- ret = wait_till_ready(nor);
+- if (ret)
+- goto time_out;
+-
+ write_enable(nor);
+
+ nor->sst_write_second = false;
+@@ -719,7 +736,7 @@ static int sst_write(struct mtd_info *mt
+
+ /* write one byte. */
+ nor->write(nor, to, 1, retlen, buf);
+- ret = wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto time_out;
+ }
+@@ -731,7 +748,7 @@ static int sst_write(struct mtd_info *mt
+
+ /* write two bytes. */
+ nor->write(nor, to, 2, retlen, buf + actual);
+- ret = wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto time_out;
+ to += 2;
+@@ -740,7 +757,7 @@ static int sst_write(struct mtd_info *mt
+ nor->sst_write_second = false;
+
+ write_disable(nor);
+- ret = wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto time_out;
+
+@@ -751,7 +768,7 @@ static int sst_write(struct mtd_info *mt
+ nor->program_opcode = SPINOR_OP_BP;
+ nor->write(nor, to, 1, retlen, buf + actual);
+
+- ret = wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto time_out;
+ write_disable(nor);
+@@ -779,11 +796,6 @@ static int spi_nor_write(struct mtd_info
+ if (ret)
+ return ret;
+
+- /* Wait until finished previous write command. */
+- ret = wait_till_ready(nor);
+- if (ret)
+- goto write_err;
+-
+ write_enable(nor);
+
+ page_offset = to & (nor->page_size - 1);
+@@ -802,16 +814,20 @@ static int spi_nor_write(struct mtd_info
+ if (page_size > nor->page_size)
+ page_size = nor->page_size;
+
+- wait_till_ready(nor);
++ 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 0;
++ return ret;
+ }
+
+ static int macronix_quad_enable(struct spi_nor *nor)
+@@ -824,7 +840,7 @@ static int macronix_quad_enable(struct s
+ nor->cmd_buf[0] = val | SR_QUAD_EN_MX;
+ nor->write_reg(nor, SPINOR_OP_WRSR, nor->cmd_buf, 1, 0);
+
+- if (wait_till_ready(nor))
++ if (spi_nor_wait_till_ready(nor))
+ return 1;
+
+ ret = read_sr(nor);
+@@ -874,11 +890,11 @@ static int spansion_quad_enable(struct s
+ return 0;
+ }
+
+-static int set_quad_mode(struct spi_nor *nor, u32 jedec_id)
++static int set_quad_mode(struct spi_nor *nor, struct flash_info *info)
+ {
+ int status;
+
+- switch (JEDEC_MFR(jedec_id)) {
++ switch (JEDEC_MFR(info)) {
+ case CFI_MFR_MACRONIX:
+ status = macronix_quad_enable(nor);
+ if (status) {
+@@ -904,11 +920,6 @@ static int spi_nor_check(struct spi_nor
+ return -EINVAL;
+ }
+
+- if (!nor->read_id)
+- nor->read_id = spi_nor_read_id;
+- if (!nor->wait_till_ready)
+- nor->wait_till_ready = spi_nor_wait_till_ready;
+-
+ return 0;
+ }
+
+@@ -926,16 +937,24 @@ int spi_nor_scan(struct spi_nor *nor, co
+ if (ret)
+ return ret;
+
+- id = spi_nor_match_id(name);
+- if (!id)
++ /* 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 (info->jedec_id) {
++ /*
++ * 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 = nor->read_id(nor);
++ jid = spi_nor_read_id(nor);
+ if (IS_ERR(jid)) {
+ return PTR_ERR(jid);
+ } else if (jid != id) {
+@@ -960,9 +979,9 @@ int spi_nor_scan(struct spi_nor *nor, co
+ * up with the software protection bits set
+ */
+
+- if (JEDEC_MFR(info->jedec_id) == CFI_MFR_ATMEL ||
+- JEDEC_MFR(info->jedec_id) == CFI_MFR_INTEL ||
+- JEDEC_MFR(info->jedec_id) == CFI_MFR_SST) {
++ 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);
+ }
+@@ -977,7 +996,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+ mtd->_read = spi_nor_read;
+
+ /* nor protection support for STmicro chips */
+- if (JEDEC_MFR(info->jedec_id) == CFI_MFR_ST) {
++ if (JEDEC_MFR(info) == CFI_MFR_ST) {
+ mtd->_lock = spi_nor_lock;
+ mtd->_unlock = spi_nor_unlock;
+ }
+@@ -988,9 +1007,8 @@ int spi_nor_scan(struct spi_nor *nor, co
+ else
+ mtd->_write = spi_nor_write;
+
+- if ((info->flags & USE_FSR) &&
+- nor->wait_till_ready == spi_nor_wait_till_ready)
+- nor->wait_till_ready = spi_nor_wait_till_fsr_ready;
++ 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 */
+@@ -1031,7 +1049,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+
+ /* 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->jedec_id);
++ ret = set_quad_mode(nor, info);
+ if (ret) {
+ dev_err(dev, "quad mode not supported\n");
+ return ret;
+@@ -1067,7 +1085,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+ else if (mtd->size > 0x1000000) {
+ /* enable 4-byte addressing if the device exceeds 16MiB */
+ nor->addr_width = 4;
+- if (JEDEC_MFR(info->jedec_id) == CFI_MFR_AMD) {
++ if (JEDEC_MFR(info) == CFI_MFR_AMD) {
+ /* Dedicated 4-byte command set */
+ switch (nor->flash_read) {
+ case SPI_NOR_QUAD:
+@@ -1088,7 +1106,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+ nor->erase_opcode = SPINOR_OP_SE_4B;
+ mtd->erasesize = info->sector_size;
+ } else
+- set_4byte(nor, info->jedec_id, 1);
++ set_4byte(nor, info, 1);
+ } else {
+ nor->addr_width = 3;
+ }
+--- a/include/linux/mtd/spi-nor.h
++++ b/include/linux/mtd/spi-nor.h
+@@ -116,6 +116,10 @@ enum spi_nor_ops {
+ SPI_NOR_OPS_UNLOCK,
+ };
+
++enum spi_nor_option_flags {
++ SNOR_F_USE_FSR = BIT(0),
++};
++
+ /**
+ * struct spi_nor - Structure for defining a the SPI NOR layer
+ * @mtd: point to a mtd_info structure
+@@ -129,6 +133,7 @@ enum spi_nor_ops {
+ * @program_opcode: the program opcode
+ * @flash_read: the mode of the read
+ * @sst_write_second: used by the SST write operation
++ * @flags: flag options for the current SPI-NOR (SNOR_F_*)
+ * @cfg: used by the read_xfer/write_xfer
+ * @cmd_buf: used by the write_reg
+ * @prepare: [OPTIONAL] do some preparations for the
+@@ -139,9 +144,6 @@ enum spi_nor_ops {
+ * @write_xfer: [OPTIONAL] the writefundamental primitive
+ * @read_reg: [DRIVER-SPECIFIC] read out the register
+ * @write_reg: [DRIVER-SPECIFIC] write data to the register
+- * @read_id: [REPLACEABLE] read out the ID data, and find
+- * the proper spi_device_id
+- * @wait_till_ready: [REPLACEABLE] wait till the NOR becomes ready
+ * @read: [DRIVER-SPECIFIC] read data from the SPI NOR
+ * @write: [DRIVER-SPECIFIC] write data to the SPI NOR
+ * @erase: [DRIVER-SPECIFIC] erase a sector of the SPI NOR
+@@ -160,6 +162,7 @@ struct spi_nor {
+ u8 program_opcode;
+ enum read_mode flash_read;
+ bool sst_write_second;
++ u32 flags;
+ struct spi_nor_xfer_cfg cfg;
+ u8 cmd_buf[SPI_NOR_MAX_CMD_SIZE];
+
+@@ -172,8 +175,6 @@ struct spi_nor {
+ int (*read_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len);
+ int (*write_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len,
+ int write_enable);
+- const struct spi_device_id *(*read_id)(struct spi_nor *nor);
+- int (*wait_till_ready)(struct spi_nor *nor);
+
+ int (*read)(struct spi_nor *nor, loff_t from,
+ size_t len, size_t *retlen, u_char *read_buf);
+++ /dev/null
---- a/drivers/mtd/spi-nor/spi-nor.c
-+++ b/drivers/mtd/spi-nor/spi-nor.c
-@@ -925,29 +925,23 @@ int spi_nor_scan(struct spi_nor *nor, co
- if (ret)
- return ret;
-
-- info = (void *)id->driver_data;
--
-- if (info->jedec_id) {
-- const struct spi_device_id *jid;
--
-- jid = 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;
-+ if (id) {
-+ info = (void *)id->driver_data;
-+ if (info->jedec_id) {
-+ dev_warn(dev,
-+ "passed SPI device ID (%s) contains JEDEC, ignoring it, driver should be fixed!\n",
-+ id->name);
-+ id = NULL;
- }
- }
-
-+ if (!id) {
-+ id = nor->read_id(nor);
-+ if (IS_ERR(id))
-+ return PTR_ERR(id);
-+ }
-+ info = (void *)id->driver_data;
-+
- mutex_init(&nor->lock);
-
- /*
+++ /dev/null
---- a/drivers/mtd/spi-nor/fsl-quadspi.c
-+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
-@@ -719,16 +719,10 @@ static int fsl_qspi_read(struct spi_nor
- {
- struct fsl_qspi *q = nor->priv;
- u8 cmd = nor->read_opcode;
-- int ret;
-
- dev_dbg(q->dev, "cmd [%x],read from (0x%p, 0x%.8x, 0x%.8x),len:%d\n",
- cmd, q->ahb_base, q->chip_base_addr, (unsigned int)from, len);
-
-- /* Wait until the previous command is finished. */
-- ret = nor->wait_till_ready(nor);
-- if (ret)
-- return ret;
--
- /* Read out the data directly from the AHB buffer.*/
- memcpy(buf, q->ahb_base + q->chip_base_addr + from, len);
-
-@@ -744,16 +738,6 @@ static int fsl_qspi_erase(struct spi_nor
- dev_dbg(nor->dev, "%dKiB at 0x%08x:0x%08x\n",
- nor->mtd->erasesize / 1024, q->chip_base_addr, (u32)offs);
-
-- /* Wait until finished previous write command. */
-- ret = nor->wait_till_ready(nor);
-- if (ret)
-- return ret;
--
-- /* Send write enable, then erase commands. */
-- ret = nor->write_reg(nor, SPINOR_OP_WREN, NULL, 0, 0);
-- if (ret)
-- return ret;
--
- ret = fsl_qspi_runcmd(q, nor->erase_opcode, offs, 0);
- if (ret)
- return ret;
---- a/drivers/mtd/spi-nor/spi-nor.c
-+++ b/drivers/mtd/spi-nor/spi-nor.c
-@@ -163,81 +163,69 @@ static inline int set_4byte(struct spi_n
- return nor->write_reg(nor, SPINOR_OP_BRWR, nor->cmd_buf, 1, 0);
- }
- }
--
--static int spi_nor_wait_till_ready(struct spi_nor *nor)
-+static inline int spi_nor_sr_ready(struct spi_nor *nor)
- {
-- unsigned long deadline;
-- int sr;
--
-- deadline = jiffies + MAX_READY_WAIT_JIFFIES;
--
-- do {
-- cond_resched();
-+ int sr = read_sr(nor);
-+ if (sr < 0)
-+ return sr;
-+ else
-+ return !(sr & SR_WIP);
-+}
-
-- sr = read_sr(nor);
-- if (sr < 0)
-- break;
-- else if (!(sr & SR_WIP))
-- return 0;
-- } while (!time_after_eq(jiffies, deadline));
-+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;
-+}
-
-- return -ETIMEDOUT;
-+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 sr;
-+ return sr && fsr;
- }
-
--static int spi_nor_wait_till_fsr_ready(struct spi_nor *nor)
-+/*
-+ * 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 sr;
-- int fsr;
-+ int ret;
-
- deadline = jiffies + MAX_READY_WAIT_JIFFIES;
-
- do {
- cond_resched();
-
-- sr = read_sr(nor);
-- if (sr < 0) {
-- break;
-- } else if (!(sr & SR_WIP)) {
-- fsr = read_fsr(nor);
-- if (fsr < 0)
-- break;
-- if (fsr & FSR_READY)
-- return 0;
-- }
-+ ret = spi_nor_ready(nor);
-+ if (ret < 0)
-+ return ret;
-+ if (ret)
-+ return 0;
- } while (!time_after_eq(jiffies, deadline));
-
- return -ETIMEDOUT;
- }
-
- /*
-- * Service routine to read status register until ready, or timeout occurs.
-- * Returns non-zero if error.
-- */
--static int wait_till_ready(struct spi_nor *nor)
--{
-- return nor->wait_till_ready(nor);
--}
--
--/*
- * Erase the whole flash memory
- *
- * Returns 0 if successful, non-zero otherwise.
- */
- static int erase_chip(struct spi_nor *nor)
- {
-- int ret;
--
- dev_dbg(nor->dev, " %lldKiB\n", (long long)(nor->mtd->size >> 10));
-
-- /* Wait until finished previous write command. */
-- ret = wait_till_ready(nor);
-- if (ret)
-- return ret;
--
-- /* Send write enable, then erase commands. */
-- write_enable(nor);
--
- return nor->write_reg(nor, SPINOR_OP_CHIP_ERASE, NULL, 0, 0);
- }
-
-@@ -290,6 +278,8 @@ static int spi_nor_erase(struct mtd_info
- if (ret)
- return ret;
-
-+ write_enable(nor);
-+
- /* whole-chip erase? */
- if (len == mtd->size) {
- if (erase_chip(nor)) {
-@@ -297,6 +287,10 @@ static int spi_nor_erase(struct mtd_info
- 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.
-@@ -312,9 +306,15 @@ static int spi_nor_erase(struct mtd_info
-
- 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;
-@@ -339,11 +339,6 @@ static int spi_nor_lock(struct mtd_info
- if (ret)
- return ret;
-
-- /* Wait until finished previous command */
-- ret = wait_till_ready(nor);
-- if (ret)
-- goto err;
--
- status_old = read_sr(nor);
-
- if (offset < mtd->size - (mtd->size / 2))
-@@ -386,11 +381,6 @@ static int spi_nor_unlock(struct mtd_inf
- if (ret)
- return ret;
-
-- /* Wait until finished previous command */
-- ret = wait_till_ready(nor);
-- if (ret)
-- goto err;
--
- status_old = read_sr(nor);
-
- if (offset+len > mtd->size - (mtd->size / 64))
-@@ -702,11 +692,6 @@ static int sst_write(struct mtd_info *mt
- if (ret)
- return ret;
-
-- /* Wait until finished previous write command. */
-- ret = wait_till_ready(nor);
-- if (ret)
-- goto time_out;
--
- write_enable(nor);
-
- nor->sst_write_second = false;
-@@ -718,7 +703,7 @@ static int sst_write(struct mtd_info *mt
-
- /* write one byte. */
- nor->write(nor, to, 1, retlen, buf);
-- ret = wait_till_ready(nor);
-+ ret = spi_nor_wait_till_ready(nor);
- if (ret)
- goto time_out;
- }
-@@ -730,7 +715,7 @@ static int sst_write(struct mtd_info *mt
-
- /* write two bytes. */
- nor->write(nor, to, 2, retlen, buf + actual);
-- ret = wait_till_ready(nor);
-+ ret = spi_nor_wait_till_ready(nor);
- if (ret)
- goto time_out;
- to += 2;
-@@ -739,7 +724,7 @@ static int sst_write(struct mtd_info *mt
- nor->sst_write_second = false;
-
- write_disable(nor);
-- ret = wait_till_ready(nor);
-+ ret = spi_nor_wait_till_ready(nor);
- if (ret)
- goto time_out;
-
-@@ -750,7 +735,7 @@ static int sst_write(struct mtd_info *mt
- nor->program_opcode = SPINOR_OP_BP;
- nor->write(nor, to, 1, retlen, buf + actual);
-
-- ret = wait_till_ready(nor);
-+ ret = spi_nor_wait_till_ready(nor);
- if (ret)
- goto time_out;
- write_disable(nor);
-@@ -778,11 +763,6 @@ static int spi_nor_write(struct mtd_info
- if (ret)
- return ret;
-
-- /* Wait until finished previous write command. */
-- ret = wait_till_ready(nor);
-- if (ret)
-- goto write_err;
--
- write_enable(nor);
-
- page_offset = to & (nor->page_size - 1);
-@@ -801,16 +781,20 @@ static int spi_nor_write(struct mtd_info
- if (page_size > nor->page_size)
- page_size = nor->page_size;
-
-- wait_till_ready(nor);
-+ 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 0;
-+ return ret;
- }
-
- static int macronix_quad_enable(struct spi_nor *nor)
-@@ -823,7 +807,7 @@ static int macronix_quad_enable(struct s
- nor->cmd_buf[0] = val | SR_QUAD_EN_MX;
- nor->write_reg(nor, SPINOR_OP_WRSR, nor->cmd_buf, 1, 0);
-
-- if (wait_till_ready(nor))
-+ if (spi_nor_wait_till_ready(nor))
- return 1;
-
- ret = read_sr(nor);
-@@ -905,8 +889,6 @@ static int spi_nor_check(struct spi_nor
-
- if (!nor->read_id)
- nor->read_id = spi_nor_read_id;
-- if (!nor->wait_till_ready)
-- nor->wait_till_ready = spi_nor_wait_till_ready;
-
- return 0;
- }
-@@ -977,9 +959,8 @@ int spi_nor_scan(struct spi_nor *nor, co
- else
- mtd->_write = spi_nor_write;
-
-- if ((info->flags & USE_FSR) &&
-- nor->wait_till_ready == spi_nor_wait_till_ready)
-- nor->wait_till_ready = spi_nor_wait_till_fsr_ready;
-+ 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 */
---- a/include/linux/mtd/spi-nor.h
-+++ b/include/linux/mtd/spi-nor.h
-@@ -116,6 +116,10 @@ enum spi_nor_ops {
- SPI_NOR_OPS_UNLOCK,
- };
-
-+enum spi_nor_option_flags {
-+ SNOR_F_USE_FSR = BIT(0),
-+};
-+
- /**
- * struct spi_nor - Structure for defining a the SPI NOR layer
- * @mtd: point to a mtd_info structure
-@@ -129,6 +133,7 @@ enum spi_nor_ops {
- * @program_opcode: the program opcode
- * @flash_read: the mode of the read
- * @sst_write_second: used by the SST write operation
-+ * @flags: flag options for the current SPI-NOR (SNOR_F_*)
- * @cfg: used by the read_xfer/write_xfer
- * @cmd_buf: used by the write_reg
- * @prepare: [OPTIONAL] do some preparations for the
-@@ -141,7 +146,6 @@ enum spi_nor_ops {
- * @write_reg: [DRIVER-SPECIFIC] write data to the register
- * @read_id: [REPLACEABLE] read out the ID data, and find
- * the proper spi_device_id
-- * @wait_till_ready: [REPLACEABLE] wait till the NOR becomes ready
- * @read: [DRIVER-SPECIFIC] read data from the SPI NOR
- * @write: [DRIVER-SPECIFIC] write data to the SPI NOR
- * @erase: [DRIVER-SPECIFIC] erase a sector of the SPI NOR
-@@ -160,6 +164,7 @@ struct spi_nor {
- u8 program_opcode;
- enum read_mode flash_read;
- bool sst_write_second;
-+ u32 flags;
- struct spi_nor_xfer_cfg cfg;
- u8 cmd_buf[SPI_NOR_MAX_CMD_SIZE];
-
-@@ -173,7 +178,6 @@ struct spi_nor {
- int (*write_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len,
- int write_enable);
- const struct spi_device_id *(*read_id)(struct spi_nor *nor);
-- int (*wait_till_ready)(struct spi_nor *nor);
-
- int (*read)(struct spi_nor *nor, loff_t from,
- size_t len, size_t *retlen, u_char *read_buf);
obj-$(CONFIG_MTD_SPI_NOR) += spi-nor.o
obj-$(CONFIG_SPI_FSL_QUADSPI) += fsl-quadspi.o
+obj-$(CONFIG_MTD_SPI_BCM53XXSPIFLASH) += bcm53xxspiflash.o
---- /dev/null
-+++ b/drivers/mtd/spi-nor/bcm53xxspiflash.c
-@@ -0,0 +1,241 @@
-+#include <linux/module.h>
-+#include <linux/delay.h>
-+#include <linux/spi/spi.h>
-+#include <linux/mtd/spi-nor.h>
-+#include <linux/mtd/mtd.h>
-+#include <linux/mtd/cfi.h>
-+
-+static const char * const probes[] = { "bcm47xxpart", NULL };
-+
-+struct bcm53xxsf {
-+ struct spi_device *spi;
-+ struct mtd_info mtd;
-+ struct spi_nor nor;
-+};
-+
-+/**************************************************
-+ * spi-nor API
-+ **************************************************/
-+
-+static int bcm53xxspiflash_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf,
-+ int len)
-+{
-+ struct bcm53xxsf *b53sf = nor->priv;
-+
-+ return spi_write_then_read(b53sf->spi, &opcode, 1, buf, len);
-+}
-+
-+static int bcm53xxspiflash_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf,
-+ int len, int write_enable)
-+{
-+ struct bcm53xxsf *b53sf = nor->priv;
-+ u8 *cmd = kzalloc(len + 1, GFP_KERNEL);
-+ int err;
-+
-+ if (!cmd)
-+ return -ENOMEM;
-+
-+ cmd[0] = opcode;
-+ memcpy(&cmd[1], buf, len);
-+ err = spi_write(b53sf->spi, cmd, len + 1);
-+
-+ kfree(cmd);
-+
-+ return err;
-+}
-+
-+static int bcm53xxspiflash_read(struct spi_nor *nor, loff_t from, size_t len,
-+ size_t *retlen, u_char *buf)
-+{
-+ struct bcm53xxsf *b53sf = nor->priv;
-+ struct spi_message m;
-+ struct spi_transfer t[2] = { { 0 }, { 0 } };
-+ unsigned char cmd[5];
-+ int cmd_len = 0;
-+ int err;
-+
-+ spi_message_init(&m);
-+
-+ cmd[cmd_len++] = SPINOR_OP_READ;
-+ if (b53sf->mtd.size > 0x1000000)
-+ cmd[cmd_len++] = (from & 0xFF000000) >> 24;
-+ cmd[cmd_len++] = (from & 0x00FF0000) >> 16;
-+ cmd[cmd_len++] = (from & 0x0000FF00) >> 8;
-+ cmd[cmd_len++] = (from & 0x000000FF) >> 0;
-+
-+ t[0].tx_buf = cmd;
-+ t[0].len = cmd_len;
-+ spi_message_add_tail(&t[0], &m);
-+
-+ t[1].rx_buf = buf;
-+ t[1].len = len;
-+ spi_message_add_tail(&t[1], &m);
-+
-+ err = spi_sync(b53sf->spi, &m);
-+ if (err)
-+ return err;
-+
-+ if (retlen && m.actual_length > cmd_len)
-+ *retlen = m.actual_length - cmd_len;
-+
-+ return 0;
-+}
-+
-+static void bcm53xxspiflash_write(struct spi_nor *nor, loff_t to, size_t len,
-+ size_t *retlen, const u_char *buf)
-+{
-+ struct bcm53xxsf *b53sf = nor->priv;
-+ struct spi_message m;
-+ struct spi_transfer t = { 0 };
-+ u8 *cmd = kzalloc(len + 5, GFP_KERNEL);
-+ int cmd_len = 0;
-+ int err;
-+
-+ if (!cmd)
-+ return;
-+
-+ spi_message_init(&m);
-+
-+ cmd[cmd_len++] = nor->program_opcode;
-+ if (b53sf->mtd.size > 0x1000000)
-+ cmd[cmd_len++] = (to & 0xFF000000) >> 24;
-+ cmd[cmd_len++] = (to & 0x00FF0000) >> 16;
-+ cmd[cmd_len++] = (to & 0x0000FF00) >> 8;
-+ cmd[cmd_len++] = (to & 0x000000FF) >> 0;
-+ memcpy(&cmd[cmd_len], buf, len);
-+
-+ t.tx_buf = cmd;
-+ t.len = cmd_len + len;
-+ spi_message_add_tail(&t, &m);
-+
-+ err = spi_sync(b53sf->spi, &m);
-+ if (err)
-+ goto out;
-+
-+ if (retlen && m.actual_length > cmd_len)
-+ *retlen += m.actual_length - cmd_len;
-+
-+out:
-+ kfree(cmd);
-+}
-+
-+static int bcm53xxspiflash_erase(struct spi_nor *nor, loff_t offs)
-+{
-+ struct bcm53xxsf *b53sf = nor->priv;
-+ unsigned char cmd[5];
-+ int i;
-+
-+ i = 0;
-+ cmd[i++] = nor->erase_opcode;
-+ if (b53sf->mtd.size > 0x1000000)
-+ cmd[i++] = (offs & 0xFF000000) >> 24;
-+ cmd[i++] = ((offs & 0x00FF0000) >> 16);
-+ cmd[i++] = ((offs & 0x0000FF00) >> 8);
-+ cmd[i++] = ((offs & 0x000000FF) >> 0);
-+
-+ return spi_write(b53sf->spi, cmd, i);
-+}
-+
-+static const struct spi_device_id *bcm53xxspiflash_read_id(struct spi_nor *nor)
-+{
-+ struct bcm53xxsf *b53sf = nor->priv;
-+ struct device *dev = &b53sf->spi->dev;
-+ const struct spi_device_id *id;
-+ unsigned char cmd[4];
-+ unsigned char resp[2];
-+ char *name = NULL;
-+ int err;
-+
-+ /* SST and Winbond/NexFlash specific command */
-+ cmd[0] = 0x90; /* Read Manufacturer / Device ID */
-+ cmd[1] = 0;
-+ cmd[2] = 0;
-+ cmd[3] = 0;
-+ err = spi_write_then_read(b53sf->spi, cmd, 4, resp, 2);
-+ if (err < 0) {
-+ dev_err(dev, "error reading SPI flash id\n");
-+ return ERR_PTR(-EBUSY);
-+ }
-+ switch (resp[0]) {
-+ case 0xef: /* Winbond/NexFlash */
-+ switch (resp[1]) {
-+ case 0x17:
-+ name = "w25q128";
-+ break;
-+ }
-+ if (!name) {
-+ dev_err(dev, "Unknown Winbond/NexFlash flash: %02X %02X\n",
-+ resp[0], resp[1]);
-+ return ERR_PTR(-ENOTSUPP);
-+ }
-+ goto found_name;
-+ }
-+
-+ /* TODO: Try more ID commands */
-+
-+ return ERR_PTR(-ENODEV);
-+
-+found_name:
-+ id = spi_nor_match_id(name);
-+ if (!id) {
-+ dev_err(dev, "No matching entry for %s flash\n", name);
-+ return ERR_PTR(-ENOENT);
-+ }
-+
-+ return id;
-+}
-+
-+/**************************************************
-+ * SPI driver
-+ **************************************************/
-+
-+static int bcm53xxspiflash_probe(struct spi_device *spi)
-+{
-+ struct bcm53xxsf *b53sf;
-+ int err;
-+
-+ b53sf = devm_kzalloc(&spi->dev, sizeof(*b53sf), GFP_KERNEL);
-+ if (!b53sf)
-+ return -ENOMEM;
-+ spi_set_drvdata(spi, b53sf);
-+
-+ b53sf->spi = spi;
-+
-+ b53sf->mtd.priv = &b53sf->nor;
-+
-+ b53sf->nor.mtd = &b53sf->mtd;
-+ b53sf->nor.dev = &spi->dev;
-+ b53sf->nor.read_reg = bcm53xxspiflash_read_reg;
-+ b53sf->nor.write_reg = bcm53xxspiflash_write_reg;
-+ b53sf->nor.read = bcm53xxspiflash_read;
-+ b53sf->nor.write = bcm53xxspiflash_write;
-+ b53sf->nor.erase = bcm53xxspiflash_erase;
-+ b53sf->nor.read_id = bcm53xxspiflash_read_id;
-+ b53sf->nor.priv = b53sf;
-+
-+ err = spi_nor_scan(&b53sf->nor, NULL, SPI_NOR_NORMAL);
-+ if (err)
-+ return err;
-+
-+ err = mtd_device_parse_register(&b53sf->mtd, probes, NULL, NULL, 0);
-+ if (err)
-+ return err;
-+
-+ return 0;
-+}
-+
-+static int bcm53xxspiflash_remove(struct spi_device *spi)
-+{
-+ return 0;
-+}
-+
-+static struct spi_driver bcm53xxspiflash_driver = {
-+ .driver = {
-+ .name = "bcm53xxspiflash",
-+ .owner = THIS_MODULE,
-+ },
-+ .probe = bcm53xxspiflash_probe,
-+ .remove = bcm53xxspiflash_remove,
-+};
-+
-+module_spi_driver(bcm53xxspiflash_driver);
+++ /dev/null
---- a/drivers/mtd/spi-nor/bcm53xxspiflash.c
-+++ b/drivers/mtd/spi-nor/bcm53xxspiflash.c
-@@ -173,7 +173,8 @@ static const struct spi_device_id *bcm53
-
- /* TODO: Try more ID commands */
-
-- return ERR_PTR(-ENODEV);
-+ /* Some chips used by Broadcom may actually support JEDEC */
-+ return spi_nor_read_id(nor);
-
- found_name:
- id = spi_nor_match_id(name);
---- a/drivers/mtd/spi-nor/spi-nor.c
-+++ b/drivers/mtd/spi-nor/spi-nor.c
-@@ -629,7 +629,7 @@ const struct spi_device_id spi_nor_ids[]
- };
- EXPORT_SYMBOL_GPL(spi_nor_ids);
-
--static const struct spi_device_id *spi_nor_read_id(struct spi_nor *nor)
-+const struct spi_device_id *spi_nor_read_id(struct spi_nor *nor)
- {
- int tmp;
- u8 id[5];
-@@ -660,6 +660,7 @@ static const struct spi_device_id *spi_n
- dev_err(nor->dev, "unrecognized JEDEC id %06x\n", jedec);
- return ERR_PTR(-ENODEV);
- }
-+EXPORT_SYMBOL_GPL(spi_nor_read_id);
-
- static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
---- a/include/linux/mtd/spi-nor.h
-+++ b/include/linux/mtd/spi-nor.h
-@@ -188,6 +188,8 @@ struct spi_nor {
- void *priv;
- };
-
-+const struct spi_device_id *spi_nor_read_id(struct spi_nor *nor);
-+
- /**
- * spi_nor_scan() - scan the SPI NOR
- * @nor: the spi_nor structure
--- /dev/null
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -26,7 +26,38 @@
+ /* 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 JEDEC_MFR(_jedec_id) ((_jedec_id) >> 16)
++#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);
+
+@@ -98,7 +129,7 @@ static inline int spi_nor_read_dummy_cyc
+ case SPI_NOR_FAST:
+ case SPI_NOR_DUAL:
+ case SPI_NOR_QUAD:
+- return 1;
++ return 8;
+ case SPI_NOR_NORMAL:
+ return 0;
+ }
+@@ -138,13 +169,14 @@ static inline struct spi_nor *mtd_to_spi
+ }
+
+ /* Enable/disable 4-byte addressing mode. */
+-static inline int set_4byte(struct spi_nor *nor, u32 jedec_id, int enable)
++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(jedec_id)) {
++ switch (JEDEC_MFR(info)) {
+ case CFI_MFR_ST: /* Micron, actually */
+ /* Some Micron need WREN command; all will accept it */
+ need_wren = true;
+@@ -165,81 +197,74 @@ static inline int set_4byte(struct spi_n
+ return nor->write_reg(nor, SPINOR_OP_BRWR, nor->cmd_buf, 1, 0);
+ }
+ }
+-
+-static int spi_nor_wait_till_ready(struct spi_nor *nor)
++static inline int spi_nor_sr_ready(struct spi_nor *nor)
+ {
+- unsigned long deadline;
+- int sr;
+-
+- deadline = jiffies + MAX_READY_WAIT_JIFFIES;
+-
+- do {
+- cond_resched();
++ int sr = read_sr(nor);
++ if (sr < 0)
++ return sr;
++ else
++ return !(sr & SR_WIP);
++}
+
+- sr = read_sr(nor);
+- if (sr < 0)
+- break;
+- else if (!(sr & SR_WIP))
+- return 0;
+- } while (!time_after_eq(jiffies, deadline));
++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;
++}
+
+- return -ETIMEDOUT;
++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;
+ }
+
+-static int spi_nor_wait_till_fsr_ready(struct spi_nor *nor)
++/*
++ * 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 sr;
+- int fsr;
++ int timeout = 0, ret;
+
+ deadline = jiffies + MAX_READY_WAIT_JIFFIES;
+
+- do {
++ 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();
++ }
+
+- sr = read_sr(nor);
+- if (sr < 0) {
+- break;
+- } else if (!(sr & SR_WIP)) {
+- fsr = read_fsr(nor);
+- if (fsr < 0)
+- break;
+- if (fsr & FSR_READY)
+- return 0;
+- }
+- } while (!time_after_eq(jiffies, deadline));
++ dev_err(nor->dev, "flash operation timed out\n");
+
+ return -ETIMEDOUT;
+ }
+
+ /*
+- * Service routine to read status register until ready, or timeout occurs.
+- * Returns non-zero if error.
+- */
+-static int wait_till_ready(struct spi_nor *nor)
+-{
+- return nor->wait_till_ready(nor);
+-}
+-
+-/*
+ * Erase the whole flash memory
+ *
+ * Returns 0 if successful, non-zero otherwise.
+ */
+ static int erase_chip(struct spi_nor *nor)
+ {
+- int ret;
+-
+ dev_dbg(nor->dev, " %lldKiB\n", (long long)(nor->mtd->size >> 10));
+
+- /* Wait until finished previous write command. */
+- ret = wait_till_ready(nor);
+- if (ret)
+- return ret;
+-
+- /* Send write enable, then erase commands. */
+- write_enable(nor);
+-
+ return nor->write_reg(nor, SPINOR_OP_CHIP_ERASE, NULL, 0, 0);
+ }
+
+@@ -294,11 +319,17 @@ static int spi_nor_erase(struct mtd_info
+
+ /* 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.
+@@ -307,6 +338,8 @@ static int spi_nor_erase(struct mtd_info
+ /* "sector"-at-a-time erase */
+ } else {
+ while (len) {
++ write_enable(nor);
++
+ if (nor->erase(nor, addr)) {
+ ret = -EIO;
+ goto erase_err;
+@@ -314,9 +347,15 @@ static int spi_nor_erase(struct mtd_info
+
+ 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;
+@@ -341,11 +380,6 @@ static int spi_nor_lock(struct mtd_info
+ if (ret)
+ return ret;
+
+- /* Wait until finished previous command */
+- ret = wait_till_ready(nor);
+- if (ret)
+- goto err;
+-
+ status_old = read_sr(nor);
+
+ if (offset < mtd->size - (mtd->size / 2))
+@@ -388,11 +422,6 @@ static int spi_nor_unlock(struct mtd_inf
+ if (ret)
+ return ret;
+
+- /* Wait until finished previous command */
+- ret = wait_till_ready(nor);
+- if (ret)
+- goto err;
+-
+ status_old = read_sr(nor);
+
+ if (offset+len > mtd->size - (mtd->size / 64))
+@@ -424,38 +453,34 @@ err:
+ return ret;
+ }
+
+-struct flash_info {
+- /* JEDEC id zero means "no ID" (most older chips); otherwise it has
+- * a high byte of zero plus three data bytes: the manufacturer id,
+- * then a two byte device id.
+- */
+- u32 jedec_id;
+- u16 ext_id;
+-
+- /* 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 */
+-};
+-
++/* 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) { \
+- .jedec_id = (_jedec_id), \
+- .ext_id = (_ext_id), \
++ .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, \
+@@ -507,6 +532,9 @@ static const struct spi_device_id spi_no
+ { "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) },
+@@ -532,6 +560,7 @@ static const struct spi_device_id spi_no
+ { "mx66l1g55g", INFO(0xc2261b, 0, 64 * 1024, 2048, SPI_NOR_QUAD_READ) },
+
+ /* Micron */
++ { "n25q032", INFO(0x20ba16, 0, 64 * 1024, 64, 0) },
+ { "n25q064", INFO(0x20ba17, 0, 64 * 1024, 128, 0) },
+ { "n25q128a11", INFO(0x20bb18, 0, 64 * 1024, 256, 0) },
+ { "n25q128a13", INFO(0x20ba18, 0, 64 * 1024, 256, 0) },
+@@ -556,6 +585,7 @@ static const struct spi_device_id spi_no
+ { "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) },
+@@ -577,6 +607,7 @@ static const struct spi_device_id spi_no
+ { "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) },
+@@ -588,7 +619,6 @@ static const struct spi_device_id spi_no
+ { "m25p32", INFO(0x202016, 0, 64 * 1024, 64, 0) },
+ { "m25p64", INFO(0x202017, 0, 64 * 1024, 128, 0) },
+ { "m25p128", INFO(0x202018, 0, 256 * 1024, 64, 0) },
+- { "n25q032", INFO(0x20ba16, 0, 64 * 1024, 64, 0) },
+
+ { "m25p05-nonjedec", INFO(0, 0, 32 * 1024, 2, 0) },
+ { "m25p10-nonjedec", INFO(0, 0, 32 * 1024, 4, 0) },
+@@ -644,32 +674,24 @@ static const struct spi_device_id spi_no
+ static const struct spi_device_id *spi_nor_read_id(struct spi_nor *nor)
+ {
+ int tmp;
+- u8 id[5];
+- u32 jedec;
+- u16 ext_jedec;
++ u8 id[SPI_NOR_MAX_ID_LEN];
+ struct flash_info *info;
+
+- tmp = nor->read_reg(nor, SPINOR_OP_RDID, id, 5);
++ 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);
+ }
+- jedec = id[0];
+- jedec = jedec << 8;
+- jedec |= id[1];
+- jedec = jedec << 8;
+- jedec |= id[2];
+-
+- ext_jedec = id[3] << 8 | id[4];
+
+ for (tmp = 0; tmp < ARRAY_SIZE(spi_nor_ids) - 1; tmp++) {
+ info = (void *)spi_nor_ids[tmp].driver_data;
+- if (info->jedec_id == jedec) {
+- if (info->ext_id == 0 || info->ext_id == ext_jedec)
++ if (info->id_len) {
++ if (!memcmp(info->id, id, info->id_len))
+ return &spi_nor_ids[tmp];
+ }
+ }
+- dev_err(nor->dev, "unrecognized JEDEC id %06x\n", jedec);
++ dev_err(nor->dev, "unrecognized JEDEC id bytes: %02x, %2x, %2x\n",
++ id[0], id[1], id[2]);
+ return ERR_PTR(-ENODEV);
+ }
+
+@@ -704,11 +726,6 @@ static int sst_write(struct mtd_info *mt
+ if (ret)
+ return ret;
+
+- /* Wait until finished previous write command. */
+- ret = wait_till_ready(nor);
+- if (ret)
+- goto time_out;
+-
+ write_enable(nor);
+
+ nor->sst_write_second = false;
+@@ -720,7 +737,7 @@ static int sst_write(struct mtd_info *mt
+
+ /* write one byte. */
+ nor->write(nor, to, 1, retlen, buf);
+- ret = wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto time_out;
+ }
+@@ -732,7 +749,7 @@ static int sst_write(struct mtd_info *mt
+
+ /* write two bytes. */
+ nor->write(nor, to, 2, retlen, buf + actual);
+- ret = wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto time_out;
+ to += 2;
+@@ -741,7 +758,7 @@ static int sst_write(struct mtd_info *mt
+ nor->sst_write_second = false;
+
+ write_disable(nor);
+- ret = wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto time_out;
+
+@@ -752,7 +769,7 @@ static int sst_write(struct mtd_info *mt
+ nor->program_opcode = SPINOR_OP_BP;
+ nor->write(nor, to, 1, retlen, buf + actual);
+
+- ret = wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto time_out;
+ write_disable(nor);
+@@ -780,11 +797,6 @@ static int spi_nor_write(struct mtd_info
+ if (ret)
+ return ret;
+
+- /* Wait until finished previous write command. */
+- ret = wait_till_ready(nor);
+- if (ret)
+- goto write_err;
+-
+ write_enable(nor);
+
+ page_offset = to & (nor->page_size - 1);
+@@ -803,16 +815,20 @@ static int spi_nor_write(struct mtd_info
+ if (page_size > nor->page_size)
+ page_size = nor->page_size;
+
+- wait_till_ready(nor);
++ 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 0;
++ return ret;
+ }
+
+ static int macronix_quad_enable(struct spi_nor *nor)
+@@ -825,7 +841,7 @@ static int macronix_quad_enable(struct s
+ nor->cmd_buf[0] = val | SR_QUAD_EN_MX;
+ nor->write_reg(nor, SPINOR_OP_WRSR, nor->cmd_buf, 1, 0);
+
+- if (wait_till_ready(nor))
++ if (spi_nor_wait_till_ready(nor))
+ return 1;
+
+ ret = read_sr(nor);
+@@ -875,11 +891,11 @@ static int spansion_quad_enable(struct s
+ return 0;
+ }
+
+-static int set_quad_mode(struct spi_nor *nor, u32 jedec_id)
++static int set_quad_mode(struct spi_nor *nor, struct flash_info *info)
+ {
+ int status;
+
+- switch (JEDEC_MFR(jedec_id)) {
++ switch (JEDEC_MFR(info)) {
+ case CFI_MFR_MACRONIX:
+ status = macronix_quad_enable(nor);
+ if (status) {
+@@ -905,11 +921,6 @@ static int spi_nor_check(struct spi_nor
+ return -EINVAL;
+ }
+
+- if (!nor->read_id)
+- nor->read_id = spi_nor_read_id;
+- if (!nor->wait_till_ready)
+- nor->wait_till_ready = spi_nor_wait_till_ready;
+-
+ return 0;
+ }
+
+@@ -927,16 +938,24 @@ int spi_nor_scan(struct spi_nor *nor, co
+ if (ret)
+ return ret;
+
+- id = spi_nor_match_id(name);
+- if (!id)
++ /* 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 (info->jedec_id) {
++ /*
++ * 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 = nor->read_id(nor);
++ jid = spi_nor_read_id(nor);
+ if (IS_ERR(jid)) {
+ return PTR_ERR(jid);
+ } else if (jid != id) {
+@@ -961,9 +980,9 @@ int spi_nor_scan(struct spi_nor *nor, co
+ * up with the software protection bits set
+ */
+
+- if (JEDEC_MFR(info->jedec_id) == CFI_MFR_ATMEL ||
+- JEDEC_MFR(info->jedec_id) == CFI_MFR_INTEL ||
+- JEDEC_MFR(info->jedec_id) == CFI_MFR_SST) {
++ 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);
+ }
+@@ -978,7 +997,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+ mtd->_read = spi_nor_read;
+
+ /* nor protection support for STmicro chips */
+- if (JEDEC_MFR(info->jedec_id) == CFI_MFR_ST) {
++ if (JEDEC_MFR(info) == CFI_MFR_ST) {
+ mtd->_lock = spi_nor_lock;
+ mtd->_unlock = spi_nor_unlock;
+ }
+@@ -989,9 +1008,8 @@ int spi_nor_scan(struct spi_nor *nor, co
+ else
+ mtd->_write = spi_nor_write;
+
+- if ((info->flags & USE_FSR) &&
+- nor->wait_till_ready == spi_nor_wait_till_ready)
+- nor->wait_till_ready = spi_nor_wait_till_fsr_ready;
++ 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 */
+@@ -1032,7 +1050,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+
+ /* 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->jedec_id);
++ ret = set_quad_mode(nor, info);
+ if (ret) {
+ dev_err(dev, "quad mode not supported\n");
+ return ret;
+@@ -1068,7 +1086,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+ else if (mtd->size > 0x1000000) {
+ /* enable 4-byte addressing if the device exceeds 16MiB */
+ nor->addr_width = 4;
+- if (JEDEC_MFR(info->jedec_id) == CFI_MFR_AMD) {
++ if (JEDEC_MFR(info) == CFI_MFR_AMD) {
+ /* Dedicated 4-byte command set */
+ switch (nor->flash_read) {
+ case SPI_NOR_QUAD:
+@@ -1089,7 +1107,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+ nor->erase_opcode = SPINOR_OP_SE_4B;
+ mtd->erasesize = info->sector_size;
+ } else
+- set_4byte(nor, info->jedec_id, 1);
++ set_4byte(nor, info, 1);
+ } else {
+ nor->addr_width = 3;
+ }
+--- a/include/linux/mtd/spi-nor.h
++++ b/include/linux/mtd/spi-nor.h
+@@ -116,6 +116,10 @@ enum spi_nor_ops {
+ SPI_NOR_OPS_UNLOCK,
+ };
+
++enum spi_nor_option_flags {
++ SNOR_F_USE_FSR = BIT(0),
++};
++
+ /**
+ * struct spi_nor - Structure for defining a the SPI NOR layer
+ * @mtd: point to a mtd_info structure
+@@ -129,6 +133,7 @@ enum spi_nor_ops {
+ * @program_opcode: the program opcode
+ * @flash_read: the mode of the read
+ * @sst_write_second: used by the SST write operation
++ * @flags: flag options for the current SPI-NOR (SNOR_F_*)
+ * @cfg: used by the read_xfer/write_xfer
+ * @cmd_buf: used by the write_reg
+ * @prepare: [OPTIONAL] do some preparations for the
+@@ -139,9 +144,6 @@ enum spi_nor_ops {
+ * @write_xfer: [OPTIONAL] the writefundamental primitive
+ * @read_reg: [DRIVER-SPECIFIC] read out the register
+ * @write_reg: [DRIVER-SPECIFIC] write data to the register
+- * @read_id: [REPLACEABLE] read out the ID data, and find
+- * the proper spi_device_id
+- * @wait_till_ready: [REPLACEABLE] wait till the NOR becomes ready
+ * @read: [DRIVER-SPECIFIC] read data from the SPI NOR
+ * @write: [DRIVER-SPECIFIC] write data to the SPI NOR
+ * @erase: [DRIVER-SPECIFIC] erase a sector of the SPI NOR
+@@ -160,6 +162,7 @@ struct spi_nor {
+ u8 program_opcode;
+ enum read_mode flash_read;
+ bool sst_write_second;
++ u32 flags;
+ struct spi_nor_xfer_cfg cfg;
+ u8 cmd_buf[SPI_NOR_MAX_CMD_SIZE];
+
+@@ -172,8 +175,6 @@ struct spi_nor {
+ int (*read_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len);
+ int (*write_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len,
+ int write_enable);
+- const struct spi_device_id *(*read_id)(struct spi_nor *nor);
+- int (*wait_till_ready)(struct spi_nor *nor);
+
+ int (*read)(struct spi_nor *nor, loff_t from,
+ size_t len, size_t *retlen, u_char *read_buf);
+++ /dev/null
---- a/drivers/mtd/spi-nor/spi-nor.c
-+++ b/drivers/mtd/spi-nor/spi-nor.c
-@@ -931,29 +931,23 @@ int spi_nor_scan(struct spi_nor *nor, co
- if (!id)
- return -ENOENT;
-
-- info = (void *)id->driver_data;
--
-- if (info->jedec_id) {
-- const struct spi_device_id *jid;
--
-- jid = 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;
-+ if (id) {
-+ info = (void *)id->driver_data;
-+ if (info->jedec_id) {
-+ dev_warn(dev,
-+ "passed SPI device ID (%s) contains JEDEC, ignoring it, driver should be fixed!\n",
-+ id->name);
-+ id = NULL;
- }
- }
-
-+ if (!id) {
-+ id = nor->read_id(nor);
-+ if (IS_ERR(id))
-+ return PTR_ERR(id);
-+ }
-+ info = (void *)id->driver_data;
-+
- mutex_init(&nor->lock);
-
- /*
+++ /dev/null
---- a/drivers/mtd/spi-nor/fsl-quadspi.c
-+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
-@@ -719,16 +719,10 @@ static int fsl_qspi_read(struct spi_nor
- {
- struct fsl_qspi *q = nor->priv;
- u8 cmd = nor->read_opcode;
-- int ret;
-
- dev_dbg(q->dev, "cmd [%x],read from (0x%p, 0x%.8x, 0x%.8x),len:%d\n",
- cmd, q->ahb_base, q->chip_base_addr, (unsigned int)from, len);
-
-- /* Wait until the previous command is finished. */
-- ret = nor->wait_till_ready(nor);
-- if (ret)
-- return ret;
--
- /* Read out the data directly from the AHB buffer.*/
- memcpy(buf, q->ahb_base + q->chip_base_addr + from, len);
-
-@@ -744,16 +738,6 @@ static int fsl_qspi_erase(struct spi_nor
- dev_dbg(nor->dev, "%dKiB at 0x%08x:0x%08x\n",
- nor->mtd->erasesize / 1024, q->chip_base_addr, (u32)offs);
-
-- /* Wait until finished previous write command. */
-- ret = nor->wait_till_ready(nor);
-- if (ret)
-- return ret;
--
-- /* Send write enable, then erase commands. */
-- ret = nor->write_reg(nor, SPINOR_OP_WREN, NULL, 0, 0);
-- if (ret)
-- return ret;
--
- ret = fsl_qspi_runcmd(q, nor->erase_opcode, offs, 0);
- if (ret)
- return ret;
---- a/drivers/mtd/spi-nor/spi-nor.c
-+++ b/drivers/mtd/spi-nor/spi-nor.c
-@@ -165,81 +165,69 @@ static inline int set_4byte(struct spi_n
- return nor->write_reg(nor, SPINOR_OP_BRWR, nor->cmd_buf, 1, 0);
- }
- }
--
--static int spi_nor_wait_till_ready(struct spi_nor *nor)
-+static inline int spi_nor_sr_ready(struct spi_nor *nor)
- {
-- unsigned long deadline;
-- int sr;
--
-- deadline = jiffies + MAX_READY_WAIT_JIFFIES;
--
-- do {
-- cond_resched();
-+ int sr = read_sr(nor);
-+ if (sr < 0)
-+ return sr;
-+ else
-+ return !(sr & SR_WIP);
-+}
-
-- sr = read_sr(nor);
-- if (sr < 0)
-- break;
-- else if (!(sr & SR_WIP))
-- return 0;
-- } while (!time_after_eq(jiffies, deadline));
-+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;
-+}
-
-- return -ETIMEDOUT;
-+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 sr;
-+ return sr && fsr;
- }
-
--static int spi_nor_wait_till_fsr_ready(struct spi_nor *nor)
-+/*
-+ * 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 sr;
-- int fsr;
-+ int ret;
-
- deadline = jiffies + MAX_READY_WAIT_JIFFIES;
-
- do {
- cond_resched();
-
-- sr = read_sr(nor);
-- if (sr < 0) {
-- break;
-- } else if (!(sr & SR_WIP)) {
-- fsr = read_fsr(nor);
-- if (fsr < 0)
-- break;
-- if (fsr & FSR_READY)
-- return 0;
-- }
-+ ret = spi_nor_ready(nor);
-+ if (ret < 0)
-+ return ret;
-+ if (ret)
-+ return 0;
- } while (!time_after_eq(jiffies, deadline));
-
- return -ETIMEDOUT;
- }
-
- /*
-- * Service routine to read status register until ready, or timeout occurs.
-- * Returns non-zero if error.
-- */
--static int wait_till_ready(struct spi_nor *nor)
--{
-- return nor->wait_till_ready(nor);
--}
--
--/*
- * Erase the whole flash memory
- *
- * Returns 0 if successful, non-zero otherwise.
- */
- static int erase_chip(struct spi_nor *nor)
- {
-- int ret;
--
- dev_dbg(nor->dev, " %lldKiB\n", (long long)(nor->mtd->size >> 10));
-
-- /* Wait until finished previous write command. */
-- ret = wait_till_ready(nor);
-- if (ret)
-- return ret;
--
-- /* Send write enable, then erase commands. */
-- write_enable(nor);
--
- return nor->write_reg(nor, SPINOR_OP_CHIP_ERASE, NULL, 0, 0);
- }
-
-@@ -292,6 +280,8 @@ static int spi_nor_erase(struct mtd_info
- if (ret)
- return ret;
-
-+ write_enable(nor);
-+
- /* whole-chip erase? */
- if (len == mtd->size) {
- if (erase_chip(nor)) {
-@@ -299,6 +289,10 @@ static int spi_nor_erase(struct mtd_info
- 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.
-@@ -314,9 +308,15 @@ static int spi_nor_erase(struct mtd_info
-
- 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;
-@@ -341,11 +341,6 @@ static int spi_nor_lock(struct mtd_info
- if (ret)
- return ret;
-
-- /* Wait until finished previous command */
-- ret = wait_till_ready(nor);
-- if (ret)
-- goto err;
--
- status_old = read_sr(nor);
-
- if (offset < mtd->size - (mtd->size / 2))
-@@ -388,11 +383,6 @@ static int spi_nor_unlock(struct mtd_inf
- if (ret)
- return ret;
-
-- /* Wait until finished previous command */
-- ret = wait_till_ready(nor);
-- if (ret)
-- goto err;
--
- status_old = read_sr(nor);
-
- if (offset+len > mtd->size - (mtd->size / 64))
-@@ -704,11 +694,6 @@ static int sst_write(struct mtd_info *mt
- if (ret)
- return ret;
-
-- /* Wait until finished previous write command. */
-- ret = wait_till_ready(nor);
-- if (ret)
-- goto time_out;
--
- write_enable(nor);
-
- nor->sst_write_second = false;
-@@ -720,7 +705,7 @@ static int sst_write(struct mtd_info *mt
-
- /* write one byte. */
- nor->write(nor, to, 1, retlen, buf);
-- ret = wait_till_ready(nor);
-+ ret = spi_nor_wait_till_ready(nor);
- if (ret)
- goto time_out;
- }
-@@ -732,7 +717,7 @@ static int sst_write(struct mtd_info *mt
-
- /* write two bytes. */
- nor->write(nor, to, 2, retlen, buf + actual);
-- ret = wait_till_ready(nor);
-+ ret = spi_nor_wait_till_ready(nor);
- if (ret)
- goto time_out;
- to += 2;
-@@ -741,7 +726,7 @@ static int sst_write(struct mtd_info *mt
- nor->sst_write_second = false;
-
- write_disable(nor);
-- ret = wait_till_ready(nor);
-+ ret = spi_nor_wait_till_ready(nor);
- if (ret)
- goto time_out;
-
-@@ -752,7 +737,7 @@ static int sst_write(struct mtd_info *mt
- nor->program_opcode = SPINOR_OP_BP;
- nor->write(nor, to, 1, retlen, buf + actual);
-
-- ret = wait_till_ready(nor);
-+ ret = spi_nor_wait_till_ready(nor);
- if (ret)
- goto time_out;
- write_disable(nor);
-@@ -780,11 +765,6 @@ static int spi_nor_write(struct mtd_info
- if (ret)
- return ret;
-
-- /* Wait until finished previous write command. */
-- ret = wait_till_ready(nor);
-- if (ret)
-- goto write_err;
--
- write_enable(nor);
-
- page_offset = to & (nor->page_size - 1);
-@@ -803,16 +783,20 @@ static int spi_nor_write(struct mtd_info
- if (page_size > nor->page_size)
- page_size = nor->page_size;
-
-- wait_till_ready(nor);
-+ 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 0;
-+ return ret;
- }
-
- static int macronix_quad_enable(struct spi_nor *nor)
-@@ -825,7 +809,7 @@ static int macronix_quad_enable(struct s
- nor->cmd_buf[0] = val | SR_QUAD_EN_MX;
- nor->write_reg(nor, SPINOR_OP_WRSR, nor->cmd_buf, 1, 0);
-
-- if (wait_till_ready(nor))
-+ if (spi_nor_wait_till_ready(nor))
- return 1;
-
- ret = read_sr(nor);
-@@ -907,8 +891,6 @@ static int spi_nor_check(struct spi_nor
-
- if (!nor->read_id)
- nor->read_id = spi_nor_read_id;
-- if (!nor->wait_till_ready)
-- nor->wait_till_ready = spi_nor_wait_till_ready;
-
- return 0;
- }
-@@ -983,9 +965,8 @@ int spi_nor_scan(struct spi_nor *nor, co
- else
- mtd->_write = spi_nor_write;
-
-- if ((info->flags & USE_FSR) &&
-- nor->wait_till_ready == spi_nor_wait_till_ready)
-- nor->wait_till_ready = spi_nor_wait_till_fsr_ready;
-+ 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 */
---- a/include/linux/mtd/spi-nor.h
-+++ b/include/linux/mtd/spi-nor.h
-@@ -116,6 +116,10 @@ enum spi_nor_ops {
- SPI_NOR_OPS_UNLOCK,
- };
-
-+enum spi_nor_option_flags {
-+ SNOR_F_USE_FSR = BIT(0),
-+};
-+
- /**
- * struct spi_nor - Structure for defining a the SPI NOR layer
- * @mtd: point to a mtd_info structure
-@@ -129,6 +133,7 @@ enum spi_nor_ops {
- * @program_opcode: the program opcode
- * @flash_read: the mode of the read
- * @sst_write_second: used by the SST write operation
-+ * @flags: flag options for the current SPI-NOR (SNOR_F_*)
- * @cfg: used by the read_xfer/write_xfer
- * @cmd_buf: used by the write_reg
- * @prepare: [OPTIONAL] do some preparations for the
-@@ -141,7 +146,6 @@ enum spi_nor_ops {
- * @write_reg: [DRIVER-SPECIFIC] write data to the register
- * @read_id: [REPLACEABLE] read out the ID data, and find
- * the proper spi_device_id
-- * @wait_till_ready: [REPLACEABLE] wait till the NOR becomes ready
- * @read: [DRIVER-SPECIFIC] read data from the SPI NOR
- * @write: [DRIVER-SPECIFIC] write data to the SPI NOR
- * @erase: [DRIVER-SPECIFIC] erase a sector of the SPI NOR
-@@ -160,6 +164,7 @@ struct spi_nor {
- u8 program_opcode;
- enum read_mode flash_read;
- bool sst_write_second;
-+ u32 flags;
- struct spi_nor_xfer_cfg cfg;
- u8 cmd_buf[SPI_NOR_MAX_CMD_SIZE];
-
-@@ -173,7 +178,6 @@ struct spi_nor {
- int (*write_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len,
- int write_enable);
- const struct spi_device_id *(*read_id)(struct spi_nor *nor);
-- int (*wait_till_ready)(struct spi_nor *nor);
-
- int (*read)(struct spi_nor *nor, loff_t from,
- size_t len, size_t *retlen, u_char *read_buf);
obj-$(CONFIG_MTD_SPI_NOR) += spi-nor.o
obj-$(CONFIG_SPI_FSL_QUADSPI) += fsl-quadspi.o
+obj-$(CONFIG_MTD_SPI_BCM53XXSPIFLASH) += bcm53xxspiflash.o
---- /dev/null
-+++ b/drivers/mtd/spi-nor/bcm53xxspiflash.c
-@@ -0,0 +1,241 @@
-+#include <linux/module.h>
-+#include <linux/delay.h>
-+#include <linux/spi/spi.h>
-+#include <linux/mtd/spi-nor.h>
-+#include <linux/mtd/mtd.h>
-+#include <linux/mtd/cfi.h>
-+
-+static const char * const probes[] = { "bcm47xxpart", NULL };
-+
-+struct bcm53xxsf {
-+ struct spi_device *spi;
-+ struct mtd_info mtd;
-+ struct spi_nor nor;
-+};
-+
-+/**************************************************
-+ * spi-nor API
-+ **************************************************/
-+
-+static int bcm53xxspiflash_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf,
-+ int len)
-+{
-+ struct bcm53xxsf *b53sf = nor->priv;
-+
-+ return spi_write_then_read(b53sf->spi, &opcode, 1, buf, len);
-+}
-+
-+static int bcm53xxspiflash_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf,
-+ int len, int write_enable)
-+{
-+ struct bcm53xxsf *b53sf = nor->priv;
-+ u8 *cmd = kzalloc(len + 1, GFP_KERNEL);
-+ int err;
-+
-+ if (!cmd)
-+ return -ENOMEM;
-+
-+ cmd[0] = opcode;
-+ memcpy(&cmd[1], buf, len);
-+ err = spi_write(b53sf->spi, cmd, len + 1);
-+
-+ kfree(cmd);
-+
-+ return err;
-+}
-+
-+static int bcm53xxspiflash_read(struct spi_nor *nor, loff_t from, size_t len,
-+ size_t *retlen, u_char *buf)
-+{
-+ struct bcm53xxsf *b53sf = nor->priv;
-+ struct spi_message m;
-+ struct spi_transfer t[2] = { { 0 }, { 0 } };
-+ unsigned char cmd[5];
-+ int cmd_len = 0;
-+ int err;
-+
-+ spi_message_init(&m);
-+
-+ cmd[cmd_len++] = SPINOR_OP_READ;
-+ if (b53sf->mtd.size > 0x1000000)
-+ cmd[cmd_len++] = (from & 0xFF000000) >> 24;
-+ cmd[cmd_len++] = (from & 0x00FF0000) >> 16;
-+ cmd[cmd_len++] = (from & 0x0000FF00) >> 8;
-+ cmd[cmd_len++] = (from & 0x000000FF) >> 0;
-+
-+ t[0].tx_buf = cmd;
-+ t[0].len = cmd_len;
-+ spi_message_add_tail(&t[0], &m);
-+
-+ t[1].rx_buf = buf;
-+ t[1].len = len;
-+ spi_message_add_tail(&t[1], &m);
-+
-+ err = spi_sync(b53sf->spi, &m);
-+ if (err)
-+ return err;
-+
-+ if (retlen && m.actual_length > cmd_len)
-+ *retlen = m.actual_length - cmd_len;
-+
-+ return 0;
-+}
-+
-+static void bcm53xxspiflash_write(struct spi_nor *nor, loff_t to, size_t len,
-+ size_t *retlen, const u_char *buf)
-+{
-+ struct bcm53xxsf *b53sf = nor->priv;
-+ struct spi_message m;
-+ struct spi_transfer t = { 0 };
-+ u8 *cmd = kzalloc(len + 5, GFP_KERNEL);
-+ int cmd_len = 0;
-+ int err;
-+
-+ if (!cmd)
-+ return;
-+
-+ spi_message_init(&m);
-+
-+ cmd[cmd_len++] = nor->program_opcode;
-+ if (b53sf->mtd.size > 0x1000000)
-+ cmd[cmd_len++] = (to & 0xFF000000) >> 24;
-+ cmd[cmd_len++] = (to & 0x00FF0000) >> 16;
-+ cmd[cmd_len++] = (to & 0x0000FF00) >> 8;
-+ cmd[cmd_len++] = (to & 0x000000FF) >> 0;
-+ memcpy(&cmd[cmd_len], buf, len);
-+
-+ t.tx_buf = cmd;
-+ t.len = cmd_len + len;
-+ spi_message_add_tail(&t, &m);
-+
-+ err = spi_sync(b53sf->spi, &m);
-+ if (err)
-+ goto out;
-+
-+ if (retlen && m.actual_length > cmd_len)
-+ *retlen += m.actual_length - cmd_len;
-+
-+out:
-+ kfree(cmd);
-+}
-+
-+static int bcm53xxspiflash_erase(struct spi_nor *nor, loff_t offs)
-+{
-+ struct bcm53xxsf *b53sf = nor->priv;
-+ unsigned char cmd[5];
-+ int i;
-+
-+ i = 0;
-+ cmd[i++] = nor->erase_opcode;
-+ if (b53sf->mtd.size > 0x1000000)
-+ cmd[i++] = (offs & 0xFF000000) >> 24;
-+ cmd[i++] = ((offs & 0x00FF0000) >> 16);
-+ cmd[i++] = ((offs & 0x0000FF00) >> 8);
-+ cmd[i++] = ((offs & 0x000000FF) >> 0);
-+
-+ return spi_write(b53sf->spi, cmd, i);
-+}
-+
-+static const struct spi_device_id *bcm53xxspiflash_read_id(struct spi_nor *nor)
-+{
-+ struct bcm53xxsf *b53sf = nor->priv;
-+ struct device *dev = &b53sf->spi->dev;
-+ const struct spi_device_id *id;
-+ unsigned char cmd[4];
-+ unsigned char resp[2];
-+ char *name = NULL;
-+ int err;
-+
-+ /* SST and Winbond/NexFlash specific command */
-+ cmd[0] = 0x90; /* Read Manufacturer / Device ID */
-+ cmd[1] = 0;
-+ cmd[2] = 0;
-+ cmd[3] = 0;
-+ err = spi_write_then_read(b53sf->spi, cmd, 4, resp, 2);
-+ if (err < 0) {
-+ dev_err(dev, "error reading SPI flash id\n");
-+ return ERR_PTR(-EBUSY);
-+ }
-+ switch (resp[0]) {
-+ case 0xef: /* Winbond/NexFlash */
-+ switch (resp[1]) {
-+ case 0x17:
-+ name = "w25q128";
-+ break;
-+ }
-+ if (!name) {
-+ dev_err(dev, "Unknown Winbond/NexFlash flash: %02X %02X\n",
-+ resp[0], resp[1]);
-+ return ERR_PTR(-ENOTSUPP);
-+ }
-+ goto found_name;
-+ }
-+
-+ /* TODO: Try more ID commands */
-+
-+ return ERR_PTR(-ENODEV);
-+
-+found_name:
-+// id = spi_nor_match_id(name);
-+// if (!id) {
-+// dev_err(dev, "No matching entry for %s flash\n", name);
-+// return ERR_PTR(-ENOENT);
-+// }
-+
-+ return id;
-+}
-+
-+/**************************************************
-+ * SPI driver
-+ **************************************************/
-+
-+static int bcm53xxspiflash_probe(struct spi_device *spi)
-+{
-+ struct bcm53xxsf *b53sf;
-+ int err;
-+
-+ b53sf = devm_kzalloc(&spi->dev, sizeof(*b53sf), GFP_KERNEL);
-+ if (!b53sf)
-+ return -ENOMEM;
-+ spi_set_drvdata(spi, b53sf);
-+
-+ b53sf->spi = spi;
-+
-+ b53sf->mtd.priv = &b53sf->nor;
-+
-+ b53sf->nor.mtd = &b53sf->mtd;
-+ b53sf->nor.dev = &spi->dev;
-+ b53sf->nor.read_reg = bcm53xxspiflash_read_reg;
-+ b53sf->nor.write_reg = bcm53xxspiflash_write_reg;
-+ b53sf->nor.read = bcm53xxspiflash_read;
-+ b53sf->nor.write = bcm53xxspiflash_write;
-+ b53sf->nor.erase = bcm53xxspiflash_erase;
-+ b53sf->nor.read_id = bcm53xxspiflash_read_id;
-+ b53sf->nor.priv = b53sf;
-+
-+ err = spi_nor_scan(&b53sf->nor, "w25q128", SPI_NOR_NORMAL);
-+ if (err)
-+ return err;
-+
-+ err = mtd_device_parse_register(&b53sf->mtd, probes, NULL, NULL, 0);
-+ if (err)
-+ return err;
-+
-+ return 0;
-+}
-+
-+static int bcm53xxspiflash_remove(struct spi_device *spi)
-+{
-+ return 0;
-+}
-+
-+static struct spi_driver bcm53xxspiflash_driver = {
-+ .driver = {
-+ .name = "bcm53xxspiflash",
-+ .owner = THIS_MODULE,
-+ },
-+ .probe = bcm53xxspiflash_probe,
-+ .remove = bcm53xxspiflash_remove,
-+};
-+
-+module_spi_driver(bcm53xxspiflash_driver);
+++ /dev/null
---- a/drivers/mtd/spi-nor/bcm53xxspiflash.c
-+++ b/drivers/mtd/spi-nor/bcm53xxspiflash.c
-@@ -173,7 +173,8 @@ static const struct spi_device_id *bcm53
-
- /* TODO: Try more ID commands */
-
-- return ERR_PTR(-ENODEV);
-+ /* Some chips used by Broadcom may actually support JEDEC */
-+ return spi_nor_read_id(nor);
-
- found_name:
- // id = spi_nor_match_id(name);
---- a/drivers/mtd/spi-nor/spi-nor.c
-+++ b/drivers/mtd/spi-nor/spi-nor.c
-@@ -631,7 +631,7 @@ static const struct spi_device_id spi_no
- { },
- };
-
--static const struct spi_device_id *spi_nor_read_id(struct spi_nor *nor)
-+const struct spi_device_id *spi_nor_read_id(struct spi_nor *nor)
- {
- int tmp;
- u8 id[5];
-@@ -662,6 +662,7 @@ static const struct spi_device_id *spi_n
- dev_err(nor->dev, "unrecognized JEDEC id %06x\n", jedec);
- return ERR_PTR(-ENODEV);
- }
-+EXPORT_SYMBOL_GPL(spi_nor_read_id);
-
- static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
---- a/include/linux/mtd/spi-nor.h
-+++ b/include/linux/mtd/spi-nor.h
-@@ -188,6 +188,8 @@ struct spi_nor {
- void *priv;
- };
-
-+const struct spi_device_id *spi_nor_read_id(struct spi_nor *nor);
-+
- /**
- * spi_nor_scan() - scan the SPI NOR
- * @nor: the spi_nor structure
projects / openwrt / staging / chunkeey.git / commitdiff