--- /dev/null
+From 6c3b88970175e18a67eb8e55c4eba10614d0d5dc Mon Sep 17 00:00:00 2001
+From: Michel Stempin <michel.stempin@wanadoo.fr>
+Date: Mon, 15 Jul 2013 12:13:56 +0200
+Subject: [PATCH] mtd: chips: Add support for PMC SPI Flash chips in m25p80.c
+
+commit 6c3b88970175e18a67eb8e55c4eba10614d0d5dc upstream.
+
+Add support for PMC (now Chingis, part of ISSI) Pm25LV512 (512 Kib),
+Pm25LV010 (1 Mib) and Pm25LQ032 (32 Mib) SPI Flash chips.
+
+This patch addresses two generations of PMC SPI Flash chips:
+
+ - Pm25LV512 and Pm25LV010: these have 4KiB sectors and 32KiB
+ blocks. The 4KiB sector erase uses a non-standard opcode
+ (0xd7). They do not support JEDEC RDID (0x9f), and so they can only
+ be detected by matching their name string with pre-configured
+ platform data. Because of the cascaded acquisitions, the datasheet
+ is no longer available on the current manufacturer's website,
+ although it is still commonly used in some recent wireless routers
+ (<https://forum.openwrt.org/viewtopic.php?pid=186360#p186360>). The
+ only public datasheet available seems to be on GeoCities:
+ <http://www.geocities.jp/scottle556/pdf/Pm25LV512-010.pdf>
+
+ - Pm25LQ032: a newer generation flash, with 4KiB sectors and 64KiB
+ blocks. It uses the standard erase and JEDEC read-ID
+ opcodes. Manufacturer's datasheet is here:
+ <http://www.chingistek.com/img/Product_Files/Pm25LQ032C%20datasheet%20v1.6.1.pdf>
+
+This patch is resent in order to take into account both Brian Norris
+remarks and this upstream patch:
+
+commit e534ee4f9ca29fdb38eea4b0c53f2154fbd8c1ee
+Author: Krzysztof Mazur <krzysiek@podlesie.net>
+Date: Fri Feb 22 15:51:05 2013 +0100
+
+ mtd: m25p80: introduce SST_WRITE flag for SST byte programming
+
+ Not all SST devices implement the SST byte programming command.
+ Some devices (like SST25VF064C) implement only standard m25p80 page
+ write command.
+
+ Now SPI flash devices that need sst_write() are explicitly marked
+ with new SST_WRITE flag and the decision to use sst_write() is based
+ on this flag instead of manufacturer id.
+
+Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
+Signed-off-by: Michel Stempin <michel.stempin@wanadoo.fr>
+[Brian: fixed conflict]
+Signed-off-by: Brian Norris <computersforpeace@gmail.com>
+Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
+---
+ drivers/mtd/devices/m25p80.c | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+--- a/drivers/mtd/devices/m25p80.c
++++ b/drivers/mtd/devices/m25p80.c
+@@ -43,6 +43,7 @@
+ #define OPCODE_FAST_READ 0x0b /* Read data bytes (high frequency) */
+ #define OPCODE_PP 0x02 /* Page program (up to 256 bytes) */
+ #define OPCODE_BE_4K 0x20 /* Erase 4KiB block */
++#define OPCODE_BE_4K_PMC 0xd7 /* Erase 4KiB block on PMC chips */
+ #define OPCODE_BE_32K 0x52 /* Erase 32KiB block */
+ #define OPCODE_CHIP_ERASE 0xc7 /* Erase whole flash chip */
+ #define OPCODE_SE 0xd8 /* Sector erase (usually 64KiB) */
+@@ -682,6 +683,7 @@ struct flash_info {
+ #define SECT_4K 0x01 /* OPCODE_BE_4K works uniformly */
+ #define M25P_NO_ERASE 0x02 /* No erase command needed */
+ #define SST_WRITE 0x04 /* use SST byte programming */
++#define SECT_4K_PMC 0x10 /* OPCODE_BE_4K_PMC works uniformly */
+ };
+
+ #define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
+@@ -762,6 +764,11 @@ static const struct spi_device_id m25p_i
+ { "n25q128a13", INFO(0x20ba18, 0, 64 * 1024, 256, 0) },
+ { "n25q256a", INFO(0x20ba19, 0, 64 * 1024, 512, SECT_4K) },
+
++ /* PMC */
++ { "pm25lv512", INFO(0, 0, 32 * 1024, 2, SECT_4K_PMC) },
++ { "pm25lv010", INFO(0, 0, 32 * 1024, 4, SECT_4K_PMC) },
++ { "pm25lq032", INFO(0x7f9d46, 0, 64 * 1024, 64, SECT_4K) },
++
+ /* Spansion -- single (large) sector size only, at least
+ * for the chips listed here (without boot sectors).
+ */
+@@ -1014,6 +1021,9 @@ static int m25p_probe(struct spi_device
+ if (info->flags & SECT_4K) {
+ flash->erase_opcode = OPCODE_BE_4K;
+ flash->mtd.erasesize = 4096;
++ } else if (info->flags & SECT_4K_PMC) {
++ flash->erase_opcode = OPCODE_BE_4K_PMC;
++ flash->mtd.erasesize = 4096;
+ } else {
+ flash->erase_opcode = OPCODE_SE;
+ flash->mtd.erasesize = info->sector_size;
+++ /dev/null
-From dbca80cf6b3c0d0f130cdfb4b1f19f2092f62174 Mon Sep 17 00:00:00 2001
-From: Michel Stempin <michel.stempin@wanadoo.fr>
-Date: Sun, 18 Aug 2013 00:50:26 +0200
-Subject: [PATCH v2] mtd: m25p80: add support for PMC SPI flash
-
-This patch adds support for PMC (now Chingis, part of ISSI) Pm25LV512 (512
-kBbit), Pm25LV010 (1 Mbit) and Pm25LQ032 (32 Mbit) SPI flash.
-
-Two generations of PMC SPI flash chips are addressed:
-
-1) Pm25LV512 and Pm25LV010 - These have 4KB sectors and 32KB blocks. The 4KB
-sector erase uses a non-standard opcode (0xd7). They do not support JEDEC RDID
-(0x9f), and so they can only be detected by matching their name string with
-pre-configured platform data. Because of the cascaded acquisitions, the
-datasheet is no longer available on the current manufacturer's website,
-although it is still commonly used in some recent wireless routers [1]. Only
-public datasheet available seems to be on GeoCities [2].
-
-2) Pm25LQ032 - A newer generation flash, with 4KB sectors and 32KB blocks. It
-uses the standard erase and JEDEC read-ID opcodes. Manufacturer's datasheet is
-available [3].
-
-[1] https://forum.openwrt.org/viewtopic.php?pid=186360#p186360
-[2] http://www.geocities.jp/scottle556/pdf/Pm25LV512-010.pdf
-[3] http://www.chingistek.com/img/Product_Files/Pm25LQ032C%20datasheet%20v1.6.1.pdf
-
-Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
-Signed-off-by: Michel Stempin <michel.stempin@wanadoo.fr>
-CC: Brian Norris <computersforpeace@gmail.com>
-CC: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
----
-
-Changes in v2:
- - style and documentation improvements
-
- drivers/mtd/devices/m25p80.c | 10 ++++++++++
- 1 file changed, 10 insertions(+)
-
---- a/drivers/mtd/devices/m25p80.c
-+++ b/drivers/mtd/devices/m25p80.c
-@@ -45,6 +45,7 @@
- #define OPCODE_BE_4K 0x20 /* Erase 4KiB block */
- #define OPCODE_BE_32K 0x52 /* Erase 32KiB block */
- #define OPCODE_CHIP_ERASE 0xc7 /* Erase whole flash chip */
-+#define OPCODE_BE_4K_PMC 0xd7 /* Erase 4KiB block on PMC chips*/
- #define OPCODE_SE 0xd8 /* Sector erase (usually 64KiB) */
- #define OPCODE_RDID 0x9f /* Read JEDEC ID */
-
-@@ -682,6 +683,7 @@ struct flash_info {
- #define SECT_4K 0x01 /* OPCODE_BE_4K works uniformly */
- #define M25P_NO_ERASE 0x02 /* No erase command needed */
- #define SST_WRITE 0x04 /* use SST byte programming */
-+#define SECT_4K_PMC 0x08 /* OPCODE_BE_4K_PMC works uniformly */
- };
-
- #define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
-@@ -765,6 +767,11 @@ static const struct spi_device_id m25p_i
- { "n25q128a13", INFO(0x20ba18, 0, 64 * 1024, 256, 0) },
- { "n25q256a", INFO(0x20ba19, 0, 64 * 1024, 512, SECT_4K) },
-
-+ /* PMC -- pm25x "blocks" are 32K, sectors are 4K */
-+ { "pm25lv512", INFO(0, 0, 32 * 1024, 2, SECT_4K_PMC) },
-+ { "pm25lv010", INFO(0, 0, 32 * 1024, 4, SECT_4K_PMC) },
-+ { "pm25lq032", INFO(0x7F9D46, 0, 64 * 1024, 64, SECT_4K) },
-+
- /* Spansion -- single (large) sector size only, at least
- * for the chips listed here (without boot sectors).
- */
-@@ -1017,6 +1024,9 @@ static int m25p_probe(struct spi_device
- if (info->flags & SECT_4K) {
- flash->erase_opcode = OPCODE_BE_4K;
- flash->mtd.erasesize = 4096;
-+ } else if (info->flags & SECT_4K_PMC) {
-+ flash->erase_opcode = OPCODE_BE_4K_PMC;
-+ flash->mtd.erasesize = 4096;
- } else {
- flash->erase_opcode = OPCODE_SE;
- flash->mtd.erasesize = info->sector_size;
projects / openwrt / staging / dedeckeh.git / commitdiff