mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-21 06:33:41 +00:00
95 lines
4.0 KiB
Diff
95 lines
4.0 KiB
Diff
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;
|