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-rw-r--r--target/linux/ramips/patches-3.14/0044-mtd-add-chunked-read-io-to-m25p80.patch187
1 files changed, 0 insertions, 187 deletions
diff --git a/target/linux/ramips/patches-3.14/0044-mtd-add-chunked-read-io-to-m25p80.patch b/target/linux/ramips/patches-3.14/0044-mtd-add-chunked-read-io-to-m25p80.patch
deleted file mode 100644
index 6aee4ad2ab..0000000000
--- a/target/linux/ramips/patches-3.14/0044-mtd-add-chunked-read-io-to-m25p80.patch
+++ /dev/null
@@ -1,187 +0,0 @@
-From b6d5d4c3d595b4cfb6a052ac7151fdb1d9a776ea Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Sun, 27 Jul 2014 09:58:09 +0100
-Subject: [PATCH 44/57] mtd: add chunked read io to m25p80
-
-Signed-off-by: John Crispin <blogic@openwrt.org>
-Signed-off-by: Felix Fietkau <nbd@openwrt.org>
----
- drivers/mtd/devices/m25p80.c | 128 ++++++++++++++++++++++++++++++++++++++++++
- 1 file changed, 128 insertions(+)
-
---- a/drivers/mtd/devices/m25p80.c
-+++ b/drivers/mtd/devices/m25p80.c
-@@ -110,6 +110,7 @@ struct m25p {
- struct mtd_info mtd;
- u16 page_size;
- u16 addr_width;
-+ u16 chunk_size;
- u8 erase_opcode;
- u8 read_opcode;
- u8 program_opcode;
-@@ -562,6 +563,89 @@ 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, rlen;
-+
-+ pr_debug("%s: %s from 0x%08x, len %zd\n", dev_name(&flash->spi->dev),
-+ __func__, (u32)from, len);
-+
-+ 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;
-+ }
-+
-+ 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;
-+
-+ for (idx = 0; idx < len; idx += rlen) {
-+ rlen = min_t(int, flash->chunk_size, len - idx);
-+
-+ if (idx)
-+ wait_till_ready(flash);
-+
-+ t[1].rx_buf = &buf[idx];
-+ t[1].len = rlen;
-+
-+ /* 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);
-+
-+ return 0;
-+}
-+
-+static int m25p80_write_data(struct m25p *flash, struct spi_message *m,
-+ struct spi_transfer *t, int to)
-+{
-+ const void *buf = t->tx_buf;
-+ int len = t->len;
-+ int retlen = 0;
-+ int chunk_size;
-+
-+ chunk_size = flash->chunk_size;
-+ if (!chunk_size)
-+ chunk_size = len;
-+
-+ while (retlen < len) {
-+ t->tx_buf = buf + retlen;
-+ t->len = min_t(int, chunk_size, len - retlen);
-+
-+ if (retlen)
-+ wait_till_ready(flash);
-+
-+ write_enable(flash);
-+ m25p_addr2cmd(flash, to + retlen, flash->command);
-+ spi_sync(flash->spi, m);
-+
-+ retlen += m->actual_length - m25p_cmdsz(flash);
-+ }
-+
-+ return retlen;
-+}
-+
- /*
- * Write an address range to the flash chip. Data must be written in
- * FLASH_PAGESIZE chunks. The address range may be any size provided
-@@ -596,11 +680,8 @@ static int m25p80_write(struct mtd_info
- return 1;
- }
-
-- write_enable(flash);
--
- /* Set up the opcode in the write buffer. */
- flash->command[0] = flash->program_opcode;
-- m25p_addr2cmd(flash, to, flash->command);
-
- page_offset = to & (flash->page_size - 1);
-
-@@ -608,9 +689,7 @@ static int m25p80_write(struct mtd_info
- if (page_offset + len <= flash->page_size) {
- t[1].len = len;
-
-- spi_sync(flash->spi, &m);
--
-- *retlen = m.actual_length - m25p_cmdsz(flash);
-+ *retlen = m25p80_write_data(flash, &m, &t[1], to);
- } else {
- u32 i;
-
-@@ -618,9 +697,7 @@ static int m25p80_write(struct mtd_info
- page_size = flash->page_size - page_offset;
-
- t[1].len = page_size;
-- spi_sync(flash->spi, &m);
--
-- *retlen = m.actual_length - m25p_cmdsz(flash);
-+ *retlen = m25p80_write_data(flash, &m, &t[1], to);
-
- /* write everything in flash->page_size chunks */
- for (i = page_size; i < len; i += page_size) {
-@@ -628,19 +705,12 @@ static int m25p80_write(struct mtd_info
- if (page_size > flash->page_size)
- page_size = flash->page_size;
-
-- /* write the next page to flash */
-- m25p_addr2cmd(flash, to + i, flash->command);
--
- t[1].tx_buf = buf + i;
- t[1].len = page_size;
-
- wait_till_ready(flash);
-
-- write_enable(flash);
--
-- spi_sync(flash->spi, &m);
--
-- *retlen += m.actual_length - m25p_cmdsz(flash);
-+ *retlen += m25p80_write_data(flash, &m, &t[1], to + i);
- }
- }
-
-@@ -1105,6 +1175,7 @@ static int m25p_probe(struct spi_device
- struct mtd_part_parser_data ppdata;
- struct device_node *np = spi->dev.of_node;
- int ret;
-+ u32 val;
-
- /* Platform data helps sort out which chip type we have, as
- * well as how this board partitions it. If we don't have
-@@ -1187,6 +1258,12 @@ static int m25p_probe(struct spi_device
- flash->mtd._erase = m25p80_erase;
- flash->mtd._read = m25p80_read;
-
-+ if (np && !of_property_read_u32(np, "m25p,chunked-io", &val)) {
-+ dev_warn(&spi->dev, "using chunked io\n");
-+ flash->mtd._read = m25p80_read_chunked;
-+ flash->chunk_size = val;
-+ }
-+
- /* flash protection support for STmicro chips */
- if (JEDEC_MFR(info->jedec_id) == CFI_MFR_ST) {
- flash->mtd._lock = m25p80_lock;