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Diffstat (limited to 'target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch')
-rw-r--r--target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch154
1 files changed, 0 insertions, 154 deletions
diff --git a/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch b/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch
deleted file mode 100644
index 2e81e456d3..0000000000
--- a/target/linux/ramips/patches-3.18/0044-mtd-add-chunked-read-io-to-m25p80.patch
+++ /dev/null
@@ -1,154 +0,0 @@
---- a/drivers/mtd/devices/m25p80.c
-+++ b/drivers/mtd/devices/m25p80.c
-@@ -19,6 +19,7 @@
- #include <linux/errno.h>
- #include <linux/module.h>
- #include <linux/device.h>
-+#include <linux/of.h>
-
- #include <linux/mtd/mtd.h>
- #include <linux/mtd/partitions.h>
-@@ -32,6 +33,7 @@ struct m25p {
- struct spi_device *spi;
- struct spi_nor spi_nor;
- struct mtd_info mtd;
-+ u16 chunk_size;
- u8 command[MAX_CMD_SIZE];
- };
-
-@@ -117,25 +119,14 @@ static inline unsigned int m25p80_rx_nbi
- }
- }
-
--/*
-- * Read an address range from the nor chip. The address range
-- * may be any size provided it is within the physical boundaries.
-- */
--static int m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
-- size_t *retlen, u_char *buf)
-+static int __m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
-+ size_t *retlen, u_char *buf)
- {
- struct m25p *flash = nor->priv;
- struct spi_device *spi = flash->spi;
- struct spi_transfer t[2];
- struct spi_message m;
- int dummy = nor->read_dummy;
-- int ret;
--
-- /* Wait till previous write/erase is done. */
-- ret = nor->wait_till_ready(nor);
-- if (ret)
-- return ret;
--
- spi_message_init(&m);
- memset(t, 0, (sizeof t));
-
-@@ -156,6 +147,84 @@ static int m25p80_read(struct spi_nor *n
- *retlen = m.actual_length - m25p_cmdsz(nor) - dummy;
- return 0;
- }
-+/*
-+ * Read an address range from the nor chip. The address range
-+ * may be any size provided it is within the physical boundaries.
-+ */
-+static int m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
-+ size_t *retlen, u_char *buf)
-+{
-+ int ret;
-+
-+ /* Wait till previous write/erase is done. */
-+ ret = nor->wait_till_ready(nor);
-+ if (ret)
-+ return ret;
-+
-+ return __m25p80_read(nor, from, len, retlen, buf);
-+}
-+
-+
-+static void m25p80_chunked_write(struct spi_nor *nor, loff_t _from, size_t _len,
-+ size_t *_retlen, const u_char *_buf)
-+{
-+ struct m25p *flash = nor->priv;
-+ int chunk_size;
-+ int retlen = 0;
-+
-+ chunk_size = flash->chunk_size;
-+ if (!chunk_size)
-+ chunk_size = _len;
-+
-+ if (nor->addr_width > 3)
-+ chunk_size -= nor->addr_width - 3;
-+
-+ while (retlen < _len) {
-+ size_t len = min_t(int, chunk_size, _len - retlen);
-+ const u_char *buf = _buf + retlen;
-+ loff_t from = _from + retlen;
-+
-+ nor->wait_till_ready(nor);
-+ nor->write_reg(nor, SPINOR_OP_WREN, NULL, 0, 0);
-+
-+ m25p80_write(nor, from, len, &retlen, buf);
-+ }
-+ *_retlen += retlen;
-+}
-+
-+static int m25p80_chunked_read(struct spi_nor *nor, loff_t _from, size_t _len,
-+ size_t *_retlen, u_char *_buf)
-+{
-+ struct m25p *flash = nor->priv;
-+ int chunk_size;
-+ int ret;
-+
-+ /* Wait till previous write/erase is done. */
-+ ret = nor->wait_till_ready(nor);
-+ if (ret)
-+ return ret;
-+
-+ chunk_size = flash->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;
-+ int ret = __m25p80_read(nor, from, len, &retlen, buf);
-+
-+ if (ret)
-+ return ret;
-+
-+ *_retlen += retlen;
-+ }
-+
-+ return 0;
-+}
-
- static int m25p80_erase(struct spi_nor *nor, loff_t offset)
- {
-@@ -197,6 +266,7 @@ static int m25p_probe(struct spi_device
- struct spi_nor *nor;
- enum read_mode mode = SPI_NOR_NORMAL;
- char *flash_name = NULL;
-+ u32 val;
- int ret;
-
- data = dev_get_platdata(&spi->dev);
-@@ -244,6 +314,14 @@ static int m25p_probe(struct spi_device
- if (ret)
- return ret;
-
-+ if (spi->dev.of_node &&
-+ !of_property_read_u32(spi->dev.of_node, "m25p,chunked-io", &val)) {
-+ dev_warn(&spi->dev, "using chunked io\n");
-+ nor->read = m25p80_chunked_read;
-+ nor->write = m25p80_chunked_write;
-+ flash->chunk_size = val;
-+ }
-+
- ppdata.of_node = spi->dev.of_node;
-
- return mtd_device_parse_register(&flash->mtd, NULL, &ppdata,