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Diffstat (limited to 'target/linux/ramips/patches-3.10/0131-mtd-add-chunked-read-io-to-m25p80.patch')
-rw-r--r--target/linux/ramips/patches-3.10/0131-mtd-add-chunked-read-io-to-m25p80.patch161
1 files changed, 0 insertions, 161 deletions
diff --git a/target/linux/ramips/patches-3.10/0131-mtd-add-chunked-read-io-to-m25p80.patch b/target/linux/ramips/patches-3.10/0131-mtd-add-chunked-read-io-to-m25p80.patch
deleted file mode 100644
index 74453e1bdc..0000000000
--- a/target/linux/ramips/patches-3.10/0131-mtd-add-chunked-read-io-to-m25p80.patch
+++ /dev/null
@@ -1,161 +0,0 @@
-From f85e6dacdb7d7a9bc37f33cf8770006ab64286f7 Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Wed, 27 Nov 2013 20:58:16 +0100
-Subject: [PATCH 131/133] mtd: add chunked read io to m25p80
-
-Signed-off-by: John Crispin <blogic@openwrt.org>
----
- drivers/mtd/devices/m25p80.c | 127 ++++++++++++++++++++++++++++++++++++++++++
- 1 file changed, 127 insertions(+)
-
---- a/drivers/mtd/devices/m25p80.c
-+++ b/drivers/mtd/devices/m25p80.c
-@@ -392,6 +392,58 @@ static int m25p80_read(struct mtd_info *
- return 0;
- }
-
-+static int m25p80_read_chunked(struct mtd_info *mtd, loff_t from, size_t len,
-+ size_t *retlen, u_char *buf)
-+{
-+ struct m25p *flash = mtd_to_m25p(mtd);
-+ struct spi_transfer t[2];
-+ struct spi_message m;
-+ uint8_t opcode;
-+ int idx = 0;
-+
-+ pr_debug("%s: %s from 0x%08x, len %zd\n", dev_name(&flash->spi->dev),
-+ __func__, (u32)from, len);
-+
-+ spi_message_init(&m);
-+ memset(t, 0, (sizeof t));
-+
-+ t[0].tx_buf = flash->command;
-+ t[0].len = m25p_cmdsz(flash);
-+ spi_message_add_tail(&t[0], &m);
-+ spi_message_add_tail(&t[1], &m);
-+
-+ *retlen = 0;
-+
-+ while (idx < len) {
-+ int rlen = (len - idx > 4) ? (4) : (len - idx);
-+
-+ t[1].rx_buf = &buf[idx];
-+ t[1].len = rlen;
-+
-+ mutex_lock(&flash->lock);
-+
-+ /* Wait till previous write/erase is done. */
-+ if (wait_till_ready(flash)) {
-+ /* REVISIT status return?? */
-+ mutex_unlock(&flash->lock);
-+ return 1;
-+ }
-+
-+ /* Set up the write data buffer. */
-+ opcode = OPCODE_NORM_READ;
-+ flash->command[0] = opcode;
-+ m25p_addr2cmd(flash, from + idx, flash->command);
-+
-+ spi_sync(flash->spi, &m);
-+
-+ *retlen += m.actual_length - m25p_cmdsz(flash);
-+
-+ mutex_unlock(&flash->lock);
-+ idx += rlen;
-+ }
-+ return 0;
-+}
-+
- /*
- * Write an address range to the flash chip. Data must be written in
- * FLASH_PAGESIZE chunks. The address range may be any size provided
-@@ -479,6 +531,76 @@ static int m25p80_write(struct mtd_info
- return 0;
- }
-
-+static int m25p80_write_chunked(struct mtd_info *mtd, loff_t to, size_t len,
-+ size_t *retlen, const u_char *buf)
-+{
-+ struct m25p *flash = mtd_to_m25p(mtd);
-+ struct spi_transfer t;
-+ struct spi_message m;
-+ u32 i, page_size;
-+ u8 tmp[8];
-+
-+ pr_debug("%s: %s to 0x%08x, len %zd\n", dev_name(&flash->spi->dev),
-+ __func__, (u32)to, len);
-+
-+ spi_message_init(&m);
-+ memset(&t, 0, (sizeof t));
-+
-+ t.tx_buf = tmp;
-+ t.len = 8;
-+ spi_message_add_tail(&t, &m);
-+
-+ mutex_lock(&flash->lock);
-+
-+ /* Wait until finished previous write command. */
-+ if (wait_till_ready(flash)) {
-+ mutex_unlock(&flash->lock);
-+ return 1;
-+ }
-+
-+ write_enable(flash);
-+
-+ /* Set up the opcode in the write buffer. */
-+ flash->command[0] = OPCODE_PP;
-+ m25p_addr2cmd(flash, to, flash->command);
-+
-+ t.len = 4 + (to & 0x3);
-+ if (t.len == 4)
-+ t.len = 8;
-+ memcpy(tmp, flash->command, 4);
-+ memcpy(&tmp[4], buf, t.len - 4);
-+ spi_sync(flash->spi, &m);
-+ page_size = t.len - 4;
-+
-+ *retlen = m.actual_length - m25p_cmdsz(flash);
-+
-+ /* write everything in flash->page_size chunks */
-+ for (i = page_size; i < len; i += page_size) {
-+ page_size = len - i;
-+ if (page_size > 4)
-+ page_size = 4;
-+
-+ /* write the next page to flash */
-+ m25p_addr2cmd(flash, to + i, flash->command);
-+
-+ memcpy(tmp, flash->command, 4);
-+ memcpy(&tmp[4], buf + i, page_size);
-+ t.len = 4 + page_size;
-+
-+ wait_till_ready(flash);
-+
-+ write_enable(flash);
-+
-+ spi_sync(flash->spi, &m);
-+
-+ *retlen += m.actual_length - m25p_cmdsz(flash);
-+ }
-+
-+ mutex_unlock(&flash->lock);
-+
-+ return 0;
-+}
-+
- static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const u_char *buf)
- {
-@@ -1059,6 +1181,12 @@ static int m25p_probe(struct spi_device
- flash->fast_read = true;
- #endif
-
-+ if (np && of_property_read_bool(np, "m25p,chunked-io")) {
-+ dev_warn(&spi->dev, "using chunked io\n");
-+ flash->mtd._read = m25p80_read_chunked;
-+ flash->mtd._write = m25p80_write_chunked;
-+ }
-+
- #ifdef CONFIG_M25PXX_USE_FAST_READ
- flash->fast_read = true;
- #endif