openwrtv4/target/linux/layerscape/patches-4.4/1110-mtd-spi-nor-fsl-quad-add-flash-S25FS-extra-support.patch

From 034dd6241b55ab2256eecb845e941fa9b45da38e Mon Sep 17 00:00:00 2001
From: Yunhui Cui <yunhui.cui@nxp.com>
Date: Thu, 28 Apr 2016 17:03:57 +0800
Subject: [PATCH 110/113] mtd: spi-nor: fsl-quad: add flash S25FS extra
 support

[context adjustment]
not apply changes of arch/arm64/boot/dts/freescale/fsl-ls1012a-qds.dts

There are some boards have the same QSPI controller but have
different vendor flash, So, the controller can use the same
compatible and share the driver, just for a different flash to do
the appropriate adaptation. Based on this, we need add the vendor
field in spi-nor, Because we will use the field to distribute
corresponding LUT for different flash operations.

Signed-off-by: Yunhui Cui <yunhui.cui@nxp.com>
Signed-off-by: Pratiyush Mohan Srivastava <pratiyush.srivastava@nxp.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
Integrated-by: Jiang Yutang <yutang.jiang@nxp.com>
---
 drivers/mtd/spi-nor/fsl-quadspi.c |   47 ++++++++++++++++++++++++++++++-------
 drivers/mtd/spi-nor/spi-nor.c     |    5 ++--
 include/linux/mtd/spi-nor.h       |    1 +
 3 files changed, 42 insertions(+), 11 deletions(-)

--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
@@ -213,6 +213,9 @@
 
 #define QUADSPI_MIN_IOMAP SZ_4M
 
+#define FLASH_VENDOR_SPANSION_FS	"s25fs"
+#define SPANSION_S25FS_FAMILY	(1 << 1)
+
 enum fsl_qspi_devtype {
 	FSL_QUADSPI_VYBRID,
 	FSL_QUADSPI_IMX6SX,
@@ -329,6 +332,18 @@ static inline int has_added_amba_base_in
 	return q->devtype_data->driver_data & QUADSPI_AMBA_BASE_INTERNAL;
 }
 
+static u32 fsl_get_nor_vendor(struct spi_nor *nor)
+{
+	u32 vendor_id;
+
+	if (nor->vendor) {
+		if (memcmp(nor->vendor, FLASH_VENDOR_SPANSION_FS,
+					sizeof(FLASH_VENDOR_SPANSION_FS) - 1))
+			vendor_id = SPANSION_S25FS_FAMILY;
+	}
+	return vendor_id;
+}
+
 /*
  * R/W functions for big- or little-endian registers:
  * The qSPI controller's endian is independent of the CPU core's endian.
@@ -394,13 +409,15 @@ static void fsl_qspi_init_lut(struct fsl
 	int rxfifo = q->devtype_data->rxfifo;
 	u32 lut_base;
 	int i;
-	const struct fsl_qspi_devtype_data *devtype_data = q->devtype_data;
+	u32 vendor;
 
 	struct spi_nor *nor = &q->nor[0];
 	u8 addrlen = (nor->addr_width == 3) ? ADDR24BIT : ADDR32BIT;
 	u8 read_op = nor->read_opcode;
 	u8 read_dm = nor->read_dummy;
 
+	vendor = fsl_get_nor_vendor(nor);
+
 	fsl_qspi_unlock_lut(q);
 
 	/* Clear all the LUT table */
@@ -418,12 +435,25 @@ static void fsl_qspi_init_lut(struct fsl
 			    LUT1(FSL_READ, PAD1, rxfifo),
 				base + QUADSPI_LUT(lut_base + 1));
 	} else if (nor->flash_read == SPI_NOR_QUAD) {
-		qspi_writel(q, LUT0(CMD, PAD1, read_op) |
-			    LUT1(ADDR, PAD1, addrlen),
-				base + QUADSPI_LUT(lut_base));
-		qspi_writel(q, LUT0(DUMMY, PAD1, read_dm) |
-			    LUT1(FSL_READ, PAD4, rxfifo),
-				base + QUADSPI_LUT(lut_base + 1));
+		if (q->nor_size == 0x4000000) {
+			read_op = 0xEC;
+		qspi_writel(q,
+			LUT0(CMD, PAD1, read_op) | LUT1(ADDR, PAD4, addrlen),
+			base + QUADSPI_LUT(lut_base));
+		qspi_writel(q,
+			LUT0(MODE, PAD4, 0xff) | LUT1(DUMMY, PAD4, read_dm),
+			base + QUADSPI_LUT(lut_base + 1));
+		qspi_writel(q,
+			LUT0(FSL_READ, PAD4, rxfifo),
+			base + QUADSPI_LUT(lut_base + 2));
+		} else {
+			qspi_writel(q, LUT0(CMD, PAD1, read_op) |
+				    LUT1(ADDR, PAD1, addrlen),
+					base + QUADSPI_LUT(lut_base));
+			qspi_writel(q, LUT0(DUMMY, PAD1, read_dm) |
+				    LUT1(FSL_READ, PAD4, rxfifo),
+					base + QUADSPI_LUT(lut_base + 1));
+		}
 	} else if (nor->flash_read == SPI_NOR_DDR_QUAD) {
 		/* read mode : 1-4-4, such as Spansion s25fl128s. */
 		qspi_writel(q, LUT0(CMD, PAD1, read_op)
@@ -510,7 +540,8 @@ static void fsl_qspi_init_lut(struct fsl
 	 * use the same value 0x65. But it indicates different meaning.
 	 */
 	lut_base = SEQID_RDAR_OR_RD_EVCR * 4;
-	if (devtype_data->devtype == FSL_QUADSPI_LS2080A) {
+
+	if (vendor == SPANSION_S25FS_FAMILY) {
 		/*
 		* Read any device register.
 		* Used for Spansion S25FS-S family flash only.
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -797,7 +797,6 @@ static const struct flash_info spi_nor_i
 	{ "s25sl032p",  INFO(0x010215, 0x4d00,  64 * 1024,  64, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
 	{ "s25sl064p",  INFO(0x010216, 0x4d00,  64 * 1024, 128, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
 	{ "s25fs256s1", INFO6(0x010219, 0x4d0181, 64 * 1024, 512, 0)},
-	{ "s25fs512s",  INFO6(0x010220, 0x4d0081, 128 * 1024, 512, 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) },
@@ -964,11 +963,9 @@ static int spansion_s25fs_disable_4kb_er
 	ret = nor->read_reg(nor, SPINOR_OP_SPANSION_RDAR, &cr3v, 1);
 	if (ret)
 		return ret;
-/*
 	if (!(cr3v & CR3V_4KB_ERASE_UNABLE))
 		return -EPERM;
 
-*/
 	return 0;
 }
 
@@ -1335,6 +1332,8 @@ int spi_nor_scan(struct spi_nor *nor, co
 
 	if (!mtd->name)
 		mtd->name = dev_name(dev);
+	if (info->name)
+		nor->vendor = info->name;
 	mtd->priv = nor;
 	mtd->type = MTD_NORFLASH;
 	mtd->writesize = 1;
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -172,6 +172,7 @@ struct spi_nor {
 	bool			sst_write_second;
 	u32			flags;
 	u8			cmd_buf[SPI_NOR_MAX_CMD_SIZE];
+	char			*vendor;
 
 	int (*prepare)(struct spi_nor *nor, enum spi_nor_ops ops);
 	void (*unprepare)(struct spi_nor *nor, enum spi_nor_ops ops);