ramips: remove chunked-io patch and set spi->max_transfer_size instead

Signed-off-by: Felix Fietkau <nbd@nbd.name>

4 files changed, 15 insertions, 184 deletions

diff --git a/target/linux/ramips/patches-4.14/0043-spi-add-mt7621-support.patch b/target/linux/ramips/patches-4.14/0043-spi-add-mt7621-support.patch
index bc5418bab2..5f939e3e40 100644
--- a/target/linux/ramips/patches-4.14/0043-spi-add-mt7621-support.patch
+++ b/target/linux/ramips/patches-4.14/0043-spi-add-mt7621-support.patch
@@ -38,7 +38,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
  obj-$(CONFIG_SPI_OC_TINY)		+= spi-oc-tiny.o
 --- /dev/null
 +++ b/drivers/spi/spi-mt7621.c
-@@ -0,0 +1,483 @@
+@@ -0,0 +1,491 @@
 +/*
 + * spi-mt7621.c -- MediaTek MT7621 SPI controller driver
 + *
@@ -243,10 +243,12 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +		if (t->speed_hz < speed)
 +			speed = t->speed_hz;
 +
-+		if (WARN_ON(len + t->len > 36)) {
-+			status = -EIO;
-+			goto msg_done;
-+		}
++		/*
++		 * m25p80 might attempt to write more data than we can handle.
++		 * truncate the message to what we can fit into the registers
++		 */
++		if (len + t->len > 36)
++			t->len = 36 - len;
 +
 +		for (i = 0; i < t->len; i++, len++)
 +			data[len / 4] |= buf[i] << (8 * (len & 3));
@@ -426,6 +428,11 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +};
 +MODULE_DEVICE_TABLE(of, mt7621_spi_match);
 +
++static size_t mt7621_max_transfer_size(struct spi_device *spi)
++{
++	return 32;
++}
++
 +static int mt7621_spi_probe(struct platform_device *pdev)
 +{
 +	const struct of_device_id *match;
@@ -472,6 +479,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +	master->bits_per_word_mask = SPI_BPW_MASK(8);
 +	master->dev.of_node = pdev->dev.of_node;
 +	master->num_chipselect = 2;
++	master->max_transfer_size = mt7621_max_transfer_size;
 +
 +	dev_set_drvdata(&pdev->dev, master);
 +
diff --git a/target/linux/ramips/patches-4.14/0053-mtd-spi-nor-add-w25q256-3b-mode-switch.patch b/target/linux/ramips/patches-4.14/0053-mtd-spi-nor-add-w25q256-3b-mode-switch.patch
index 6ee0845ffe..b8819e53e1 100644
--- a/target/linux/ramips/patches-4.14/0053-mtd-spi-nor-add-w25q256-3b-mode-switch.patch
+++ b/target/linux/ramips/patches-4.14/0053-mtd-spi-nor-add-w25q256-3b-mode-switch.patch
@@ -165,7 +165,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	for (i = 0; i < len; ) {
  		ssize_t written;
  		loff_t addr = to + i;
-@@ -1392,6 +1463,7 @@ static int spi_nor_write(struct mtd_info
+@@ -1385,6 +1456,7 @@ static int spi_nor_write(struct mtd_info
  	}
  
  write_err:
@@ -173,7 +173,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_WRITE);
  	return ret;
  }
-@@ -2808,8 +2880,10 @@ int spi_nor_scan(struct spi_nor *nor, co
+@@ -2801,8 +2873,10 @@ 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;
diff --git a/target/linux/ramips/patches-4.14/0054-mtd-add-chunked-read-io-to-m25p80.patch b/target/linux/ramips/patches-4.14/0054-mtd-add-chunked-read-io-to-m25p80.patch
deleted file mode 100644
index b20f081afe..0000000000
--- a/target/linux/ramips/patches-4.14/0054-mtd-add-chunked-read-io-to-m25p80.patch
+++ /dev/null
@@ -1,124 +0,0 @@
---- a/drivers/mtd/spi-nor/spi-nor.c
-+++ b/drivers/mtd/spi-nor/spi-nor.c
-@@ -1468,6 +1468,67 @@ write_err:
- 	return ret;
- }
- 
-+static int spi_nor_chunked_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 addr_width = nor->addr_width + !!(nor->flags & SNOR_F_4B_EXT_ADDR);
-+	int chunk_size;
-+	int retlen = 0;
-+	int ret;
-+
-+	chunk_size = nor->chunk_size;
-+	if (!chunk_size)
-+		chunk_size = _len;
-+
-+	if (addr_width > 3)
-+		chunk_size -= addr_width - 3;
-+
-+	while (retlen < _len) {
-+		size_t len = min_t(int, chunk_size, _len - retlen);
-+		const u_char *buf = _buf + retlen;
-+		loff_t to = _to + retlen;
-+
-+		if (nor->flags & SNOR_F_SST)
-+			ret = sst_write(mtd, to, len, &retlen, buf);
-+		else
-+			ret = spi_nor_write(mtd, to, len, &retlen, buf);
-+		if (ret)
-+			return ret;
-+	}
-+
-+	*_retlen += retlen;
-+	return 0;
-+}
-+
-+static int spi_nor_chunked_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 chunk_size;
-+	int ret;
-+
-+	chunk_size = nor->chunk_size;
-+	if (!chunk_size)
-+		chunk_size = _len;
-+
-+	*_retlen = 0;
-+	while (*_retlen < _len) {
-+		size_t len = min_t(int, chunk_size, _len - *_retlen);
-+		u_char *buf = _buf + *_retlen;
-+		loff_t from = _from + *_retlen;
-+		int retlen = 0;
-+
-+		ret = spi_nor_read(mtd, from, len, &retlen, buf);
-+		if (ret)
-+			return ret;
-+
-+		*_retlen += retlen;
-+	}
-+
-+	return 0;
-+}
-+
- /**
-  * macronix_quad_enable() - set QE bit in Status Register.
-  * @nor:	pointer to a 'struct spi_nor'
-@@ -2826,10 +2887,12 @@ int spi_nor_scan(struct spi_nor *nor, co
- 	}
- 
- 	/* sst nor chips use AAI word program */
--	if (info->flags & SST_WRITE)
-+	if (info->flags & SST_WRITE) {
- 		mtd->_write = sst_write;
--	else
-+		nor->flags |= SNOR_F_SST;
-+	} else {
- 		mtd->_write = spi_nor_write;
-+	}
- 
- 	if (info->flags & USE_FSR)
- 		nor->flags |= SNOR_F_USE_FSR;
-@@ -2848,11 +2911,20 @@ int spi_nor_scan(struct spi_nor *nor, co
- 	mtd->writebufsize = nor->page_size;
- 
- 	if (np) {
-+		u32 val;
-+
- 		/* If we were instantiated by DT, use it */
- 		if (of_property_read_bool(np, "m25p,fast-read"))
- 			params.hwcaps.mask |= SNOR_HWCAPS_READ_FAST;
- 		else
- 			params.hwcaps.mask &= ~SNOR_HWCAPS_READ_FAST;
-+
-+		if (!of_property_read_u32(np, "m25p,chunked-io", &val)) {
-+			dev_info(dev, "using chunked io (size=%d)\n", val);
-+			mtd->_read = spi_nor_chunked_read;
-+			mtd->_write = spi_nor_chunked_write;
-+			nor->chunk_size = val;
-+		}
- 	} else {
- 		/* If we weren't instantiated by DT, default to fast-read */
- 		params.hwcaps.mask |= SNOR_HWCAPS_READ_FAST;
---- a/include/linux/mtd/spi-nor.h
-+++ b/include/linux/mtd/spi-nor.h
-@@ -231,6 +231,7 @@ enum spi_nor_option_flags {
- 	SNOR_F_READY_XSR_RDY	= BIT(4),
- 	SNOR_F_USE_CLSR		= BIT(5),
- 	SNOR_F_4B_EXT_ADDR	= BIT(6),
-+	SNOR_F_SST		= BIT(7),
- };
- 
- /**
-@@ -272,6 +273,7 @@ struct spi_nor {
- 	struct mutex		lock;
- 	struct device		*dev;
- 	u32			page_size;
-+	size_t			chunk_size;
- 	u8			addr_width;
- 	u8			erase_opcode;
- 	u8			read_opcode;
diff --git a/target/linux/ramips/patches-4.14/303-spi-nor-enable-4B-opcodes-for-mx66l51235l.patch b/target/linux/ramips/patches-4.14/303-spi-nor-enable-4B-opcodes-for-mx66l51235l.patch
index 7b13e68d8f..ea8d83d98e 100644
--- a/target/linux/ramips/patches-4.14/303-spi-nor-enable-4B-opcodes-for-mx66l51235l.patch
+++ b/target/linux/ramips/patches-4.14/303-spi-nor-enable-4B-opcodes-for-mx66l51235l.patch
@@ -9,56 +9,3 @@
  	{ "mx66u51235f", INFO(0xc2253a, 0, 64 * 1024, 1024, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
  	{ "mx66l1g45g",  INFO(0xc2201b, 0, 64 * 1024, 2048, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
  	{ "mx66l1g55g",  INFO(0xc2261b, 0, 64 * 1024, 2048, SPI_NOR_QUAD_READ) },
-@@ -1947,7 +1947,11 @@ static int spi_nor_read_sfdp(struct spi_
- 	nor->read_dummy = 8;
- 
- 	while (len) {
--		ret = nor->read(nor, addr, len, (u8 *)buf);
-+		size_t _len = len;
-+
-+		if (nor->chunk_size)
-+			_len = min(len, nor->chunk_size);
-+		ret = nor->read(nor, addr, _len, (u8 *)buf);
- 		if (!ret || ret > len) {
- 			ret = -EIO;
- 			goto read_err;
-@@ -2791,6 +2795,7 @@ int spi_nor_scan(struct spi_nor *nor, co
- 	struct device *dev = nor->dev;
- 	struct mtd_info *mtd = &nor->mtd;
- 	struct device_node *np = spi_nor_get_flash_node(nor);
-+	u32 val;
- 	int ret;
- 	int i;
- 
-@@ -2803,6 +2808,9 @@ int spi_nor_scan(struct spi_nor *nor, co
- 	nor->read_proto = SNOR_PROTO_1_1_1;
- 	nor->write_proto = SNOR_PROTO_1_1_1;
- 
-+	if (np && !of_property_read_u32(np, "m25p,chunked-io", &val))
-+		nor->chunk_size = val;
-+
- 	if (name)
- 		info = spi_nor_match_id(name);
- 	/* Try to auto-detect if chip name wasn't specified or not found */
-@@ -2916,19 +2924,16 @@ int spi_nor_scan(struct spi_nor *nor, co
- 	mtd->writebufsize = nor->page_size;
- 
- 	if (np) {
--		u32 val;
--
- 		/* If we were instantiated by DT, use it */
- 		if (of_property_read_bool(np, "m25p,fast-read"))
- 			params.hwcaps.mask |= SNOR_HWCAPS_READ_FAST;
- 		else
- 			params.hwcaps.mask &= ~SNOR_HWCAPS_READ_FAST;
- 
--		if (!of_property_read_u32(np, "m25p,chunked-io", &val)) {
--			dev_info(dev, "using chunked io (size=%d)\n", val);
-+		if (nor->chunk_size) {
-+			dev_info(dev, "using chunked io (size=%d)\n", nor->chunk_size);
- 			mtd->_read = spi_nor_chunked_read;
- 			mtd->_write = spi_nor_chunked_write;
--			nor->chunk_size = val;
- 		}
- 	} else {
- 		/* If we weren't instantiated by DT, default to fast-read */