[LinuxBIOS] [PATCH] flashrom: add support for ST M25P80 chips

[Carl-Daniel Hailfinger]

Add support for ST M25P80 chips to flashrom. Untested.

Signed-off-by: Carl-Daniel Hailfinger

Index: flashrom-m25p80/flash.h
===================================================================
--- flashrom-m25p80/flash.h	(Revision 3007)
+++ flashrom-m25p80/flash.h	(Arbeitskopie)
@@ -167,7 +167,12 @@
 #define SST_49LF016C		0x5C
 #define SST_49LF160C		0x4C

+/*
+ * ST25P chips are SPI, first byte of device ID is memory type, second
+ * byte of device ID is related to log(bitsize) at least for some chips.
+ */
 #define ST_ID			0x20	/* ST */
+#define ST_M25P80		0x2014
 #define ST_M50FLW040A		0x08
 #define ST_M50FLW040B		0x28
 #define ST_M50FLW080A		0x80
Index: flashrom-m25p80/flashchips.c
===================================================================
--- flashrom-m25p80/flashchips.c	(Revision 3007)
+++ flashrom-m25p80/flashchips.c	(Arbeitskopie)
@@ -140,6 +140,8 @@
     probe_jedec,	erase_chip_jedec,	write_jedec},
    {"M29F040B",	ST_ID, 		ST_M29F040B,	512, 64 * 1024,
     probe_29f040b, erase_29f040b,	write_29f040b},
+	{"M25P80",	ST_ID,		ST_M25P80,	1024, 64 * 1024,
+	 probe_spi,	generic_spi_chip_erase,	generic_spi_chip_write},
    {"82802ab",	137,		173,		512, 64 * 1024,
     probe_82802ab, erase_82802ab,	write_82802ab},
    {"82802ac",	137,		172,		1024, 64 * 1024,

[Carl-Daniel Hailfinger]

Add support for ST M25P80 chips to flashrom. Print status register
before erase to help debugging block locks.

Signed-off-by: Carl-Daniel Hailfinger

Index: flashrom-m25p80/flash.h
===================================================================
--- flashrom-m25p80/flash.h	(Revision 3007)
+++ flashrom-m25p80/flash.h	(Arbeitskopie)
@@ -167,7 +167,12 @@
 #define SST_49LF016C		0x5C
 #define SST_49LF160C		0x4C

+/*
+ * ST25P chips are SPI, first byte of device ID is memory type, second
+ * byte of device ID is related to log(bitsize) at least for some chips.
+ */
 #define ST_ID			0x20	/* ST */
+#define ST_M25P80		0x2014
 #define ST_M50FLW040A		0x08
 #define ST_M50FLW040B		0x28
 #define ST_M50FLW080A		0x80
Index: flashrom-m25p80/flashchips.c
===================================================================
--- flashrom-m25p80/flashchips.c	(Revision 3007)
+++ flashrom-m25p80/flashchips.c	(Arbeitskopie)
@@ -140,6 +140,8 @@
     probe_jedec,	erase_chip_jedec,	write_jedec},
    {"M29F040B",	ST_ID, 		ST_M29F040B,	512, 64 * 1024,
     probe_29f040b, erase_29f040b,	write_29f040b},
+	{"M25P80",	ST_ID,		ST_M25P80,	1024, 64 * 1024,
+	 probe_spi,	generic_spi_chip_erase,	generic_spi_chip_write},
    {"82802ab",	137,		173,		512, 64 * 1024,
     probe_82802ab, erase_82802ab,	write_82802ab},
    {"82802ac",	137,		172,		1024, 64 * 1024,
Index: flashrom-m25p80/spi.c
===================================================================
--- flashrom-m25p80/spi.c	(Revision 3007)
+++ flashrom-m25p80/spi.c	(Arbeitskopie)
@@ -280,7 +280,11 @@
 int generic_spi_chip_erase(struct flashchip *flash)
 {
    const unsigned char cmd[] = JEDEC_CE_2;
+	uint8_t statusreg;

+	statusreg = generic_spi_read_status_register();
+	printf("chip status register before erase is %02x\n", statusreg);
+	
    generic_spi_write_enable();
    /* Send CE (Chip Erase) */
    generic_spi_command(JEDEC_CE_2_OUTSIZE, JEDEC_CE_2_INSIZE, cmd, NULL);

[Corey Osgood]

Carl-Daniel Hailfinger wrote:
> Add support for ST M25P80 chips to flashrom. Print status register
> before erase to help debugging block locks.
>
> Signed-off-by: Carl-Daniel Hailfinger

I don't see how it could break anything, even if it doesn't work.

Acked-by: Corey Osgood

[Carl-Daniel Hailfinger]

On 16.12.2007 18:16, Corey Osgood wrote:
> Carl-Daniel Hailfinger wrote:
> > Add support for ST M25P80 chips to flashrom. Print status register
> > before erase to help debugging block locks.
> >
> > Signed-off-by: Carl-Daniel Hailfinger
>
> I don't see how it could break anything, even if it doesn't work.
>
> Acked-by: Corey Osgood

Thanks, r3008.

Regards,
Carl-Daniel