[PATCH] S3C24xx: NAND management changes to support booting from NAND

[PATCH] S3C24xx: NAND management changes to support booting from NAND

[Juergen Beisert]

It seems there are more variants of the mini2440 in the wild than I ever
thought.

In order to support booting from NAND some important settings like NAND's page
size and address cycle count must be known. These settings are provided by
four external pins and can be read back from an register of the NFC. This
patch set makes the S3C24xx NFC driver using these bits.

Hopefully now all mini2440 variants can be booted from NAND without the need
for special configurations.

Juergen


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[PATCH 1/2] mini2440: Add more info about possible SDRAM and flash devices

[Juergen Beisert]

From: Juergen Beisert <juergen@kreuzholzen.de>

It seems there are various variants of the mini2440 in the wild. Not only
the SDRAMs differ, but more important the NANDs also differ.

Signed-off-by: Juergen Beisert <juergen@kreuzholzen.de>
---
 arch/arm/boards/mini2440/mini2440.c |   50 +++++++++++++++++++++++-----------
 1 files changed, 34 insertions(+), 16 deletions(-)

diff --git a/arch/arm/boards/mini2440/mini2440.c b/arch/arm/boards/mini2440/mini2440.c
index ab309a0..1e5813a 100644
--- a/arch/arm/boards/mini2440/mini2440.c
+++ b/arch/arm/boards/mini2440/mini2440.c
@@ -316,23 +316,41 @@ This system is based on a Samsung S3C2440 CPU. The card is shipped with:
 - 12 MHz crystal reference
 - 32.768 kHz crystal reference
 - SDRAM 64 MiB (one bank only)
-   - HY57V561620 (two devices for 64 MiB to form a 32 bit bus)
-     - 4M x 16bit x 4 Banks Mobile SDRAM
-     - 8192 refresh cycles / 64 ms
-     - CL2\@100 MHz
-     - 133 MHz max
-     - collumn address size is 9 bits
-     - row address size is 13 bits
-   - MT48LC16M16 (two devices for 64 MiB to form a 32 bit bus)
-     - 4M x 16bit x 4 Banks Mobile SDRAM
-     - commercial & industrial type
-     - 8192 refresh cycles / 64 ms
-     - CL2\@100 MHz
-     - 133 MHz max
-     - collumn address size is 9 bits
-     - row address size is 13 bits
+   - Hynix SDRAM
+    - HY57V561620FTP-H (two devices for 64 MiB to form a 32 bit bus)
+      - 4M x 16bit x 4 Banks Mobile SDRAM
+      - 8192 refresh cycles / 64 ms
+      - CL2\@100 MHz
+      - 133 MHz max
+      - collumn address size is 9 bits
+      - row address size is 13 bits
+   - Micron SDRAM
+    - MT48LC16M16A2-75IT (two devices for 64 MiB to form a 32 bit bus)
+    - MT48LC16M16A2-7E (two devices for 64 MiB to form a 32 bit bus)
+      - 4M x 16bit x 4 Banks Mobile SDRAM
+      - commercial & industrial type
+      - 8192 refresh cycles / 64 ms
+      - CL2\@100 MHz
+      - 133 MHz max
+      - collumn address size is 9 bits
+      - row address size is 13 bits
 - NAND Flash 128MiB...1GiB
-   - K9Fxx08
+   - K9F1208U0C
+      - VID: 0xec, DID: 0x76
+      - Samsung/64MiB 3,3V 8-bit
+      - 512 + 8 bytes per page, 16 kiB block size, 4 address cycles
+   - K9F1G08UOB
+      - VID: 0xec, DID: 0xf1
+      - Samsung/128MiB 3,3V 8-bit
+      - 2048 + 64 bytes per page, 128 kiB block size, 4 address cycles
+   - K9F2G08UOB
+      - VID: 0xec, DID: 0xda
+      - Samsung/256MiB 3,3V 8-bit
+      - 2048 + 64 bytes per page, 128 kiB block size, 5 address cycles
+   - K9K8G08U0A
+      - VID: 0xec, DID: 0xd3
+      - Samsung/1GiB 3,3V 8-bit
+      - 2048 + 64 bytes per page, 128 kiB block size, 5 address cycles
 - NOR Flash (up to 22 address lines available)
    - AM29LV160DB, 2 MiB
    - SST39VF1601, 2 MiB
-- 
1.7.2.3


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[PATCH 2/2] mini2440: Consider correct NAND page size for boot.

[Juergen Beisert]

From: Juergen Beisert <juergen@kreuzholzen.de>

When booting from NAND, its important to know the correct page size. When
the NAND is used as the boot source, four dedicated pins are used to configure
the correct page size and address cycles. These pins can be read back in one
of the NFC registers to parametrize the load function.

This patch also extends the read routine to support more than four address
cycles on demand.

BTW: At least some mini2440s are misconfigured to use five address cycles for
a NAND device that is known to need only four address cycles. In this case the
vendor is at our side: This NAND simply ignores any additional address cycles
than required.

Signed-off-by: Juergen Beisert <juergen@kreuzholzen.de>
---
 arch/arm/boards/a9m2410/a9m2410.c                 |    2 +-
 arch/arm/boards/a9m2440/a9m2440.c                 |    2 +-
 arch/arm/boards/mini2440/mini2440.c               |    2 +-
 arch/arm/mach-s3c24xx/include/mach/s3c24x0-nand.h |    2 +-
 drivers/mtd/nand/nand_s3c2410.c                   |   60 +++++++++++++++------
 5 files changed, 48 insertions(+), 20 deletions(-)

diff --git a/arch/arm/boards/a9m2410/a9m2410.c b/arch/arm/boards/a9m2410/a9m2410.c
index 57d8fa3..8cbaec5 100644
--- a/arch/arm/boards/a9m2410/a9m2410.c
+++ b/arch/arm/boards/a9m2410/a9m2410.c
@@ -176,7 +176,7 @@ device_initcall(a9m2410_devices_init);
 #ifdef CONFIG_S3C24XX_NAND_BOOT
 void __bare_init nand_boot(void)
 {
-	s3c24x0_nand_load_image((void *)TEXT_BASE, 256 * 1024, 0, 512);
+	s3c24x0_nand_load_image((void *)TEXT_BASE, 256 * 1024, 0);
 }
 #endif
 
diff --git a/arch/arm/boards/a9m2440/a9m2440.c b/arch/arm/boards/a9m2440/a9m2440.c
index 764cd65..39b5276 100644
--- a/arch/arm/boards/a9m2440/a9m2440.c
+++ b/arch/arm/boards/a9m2440/a9m2440.c
@@ -182,7 +182,7 @@ device_initcall(a9m2440_devices_init);
 #ifdef CONFIG_S3C24XX_NAND_BOOT
 void __bare_init nand_boot(void)
 {
-	s3c24x0_nand_load_image((void *)TEXT_BASE, 256 * 1024, 0, 512);
+	s3c24x0_nand_load_image((void *)TEXT_BASE, 256 * 1024, 0);
 }
 #endif
 
diff --git a/arch/arm/boards/mini2440/mini2440.c b/arch/arm/boards/mini2440/mini2440.c
index 1e5813a..fe60d3b 100644
--- a/arch/arm/boards/mini2440/mini2440.c
+++ b/arch/arm/boards/mini2440/mini2440.c
@@ -281,7 +281,7 @@ device_initcall(mini2440_devices_init);
 #ifdef CONFIG_S3C24XX_NAND_BOOT
 void __bare_init nand_boot(void)
 {
-	s3c24x0_nand_load_image((void *)TEXT_BASE, 256 * 1024, 0, 512);
+	s3c24x0_nand_load_image((void *)TEXT_BASE, 256 * 1024, 0);
 }
 #endif
 
diff --git a/arch/arm/mach-s3c24xx/include/mach/s3c24x0-nand.h b/arch/arm/mach-s3c24xx/include/mach/s3c24x0-nand.h
index d06287e..7610b4e 100644
--- a/arch/arm/mach-s3c24xx/include/mach/s3c24x0-nand.h
+++ b/arch/arm/mach-s3c24xx/include/mach/s3c24x0-nand.h
@@ -19,7 +19,7 @@
  */
 
 #ifdef CONFIG_S3C24XX_NAND_BOOT
-extern void s3c24x0_nand_load_image(void*, int, int, int);
+extern void s3c24x0_nand_load_image(void*, int, int);
 #endif
 
 /**
diff --git a/drivers/mtd/nand/nand_s3c2410.c b/drivers/mtd/nand/nand_s3c2410.c
index df0b7c1..374a6fa 100644
--- a/drivers/mtd/nand/nand_s3c2410.c
+++ b/drivers/mtd/nand/nand_s3c2410.c
@@ -497,12 +497,23 @@ static void __nand_boot_init wait_for_completion(void __iomem *host)
 		;
 }
 
-static void __nand_boot_init nfc_addr(void __iomem *host, uint32_t offs)
+static void __nand_boot_init nfc_addr(void __iomem *host, uint32_t offs,
+					int ps, int c)
 {
 	send_addr(host, offs & 0xff);
-	send_addr(host, (offs >> 9) & 0xff);
-	send_addr(host, (offs >> 17) & 0xff);
-	send_addr(host, (offs >> 25) & 0xff);
+
+	if (ps == 512) {
+		send_addr(host, (offs >> 9) & 0xff);
+		send_addr(host, (offs >> 17) & 0xff);
+		if (c > 3)
+			send_addr(host, (offs >> 25) & 0xff);
+	} else {
+		send_addr(host, (offs >> 8) & 0xf0);
+		send_addr(host, (offs >> 12) & 0xff);
+		send_addr(host, (offs >> 20) & 0xff);
+		if (c > 4)
+			send_addr(host, (offs >> 28) & 0xff);
+	}
 }
 
 /**
@@ -510,24 +521,42 @@ static void __nand_boot_init nfc_addr(void __iomem *host, uint32_t offs)
  * @param[out] dest Pointer to target area (in SDRAM)
  * @param[in] size Bytes to read from NAND device
  * @param[in] page Start page to read from
- * @param[in] pagesize Size of each page in the NAND
  *
  * This function must be located in the first 4kiB of the barebox image
- * (guess why). When this routine is running the SDRAM is up and running
- * and it runs from the correct address (physical=linked address).
- * TODO Could we access the platform data from the boardfile?
- * Due to it makes no sense this function does not return in case of failure.
+ * (guess why).
  */
-void __nand_boot_init s3c24x0_nand_load_image(void *dest, int size, int page, int pagesize)
+void __nand_boot_init s3c24x0_nand_load_image(void *dest, int size, int page)
 {
 	void __iomem *host = (void __iomem *)S3C24X0_NAND_BASE;
-	int i;
+	unsigned pagesize;
+	int i, cycle;
 
 	/*
 	 * Reenable the NFC and use the default (but slow) access
 	 * timing or the board specific setting if provided.
 	 */
 	enable_nand_controller(host, BOARD_DEFAULT_NAND_TIMING);
+
+	/* use the current NAND hardware configuration */
+	switch (readl(S3C24X0_NAND_BASE) & 0xf) {
+	case 0x6:	/* 8 bit, 4 addr cycles, 512 bpp, normal NAND */
+		pagesize = 512;
+		cycle = 4;
+		break;
+	case 0xc:	/* 8 bit, 4 addr cycles, 2048 bpp, advanced NAND */
+		pagesize = 2048;
+		cycle = 4;
+		break;
+	case 0xe:	/* 8 bit, 5 addr cycles, 2048 bpp, advanced NAND */
+		pagesize = 2048;
+		cycle = 5;
+		break;
+	default:
+		/* we cannot output an error message here :-( */
+		disable_nand_controller(host);
+		return;
+	}
+
 	enable_cs(host);
 
 	/* Reset the NAND device */
@@ -538,7 +567,7 @@ void __nand_boot_init s3c24x0_nand_load_image(void *dest, int size, int page, in
 	do {
 		enable_cs(host);
 		send_cmd(host, NAND_CMD_READ0);
-		nfc_addr(host, page * pagesize);
+		nfc_addr(host, page * pagesize, pagesize, cycle);
 		wait_for_completion(host);
 		/* copy one page (do *not* use readsb() here!)*/
 		for (i = 0; i < pagesize; i++)
@@ -560,22 +589,21 @@ void __nand_boot_init s3c24x0_nand_load_image(void *dest, int size, int page, in
 static int do_nand_boot_test(struct command *cmdtp, int argc, char *argv[])
 {
 	void *dest;
-	int size, pagesize;
+	int size;
 
 	if (argc < 3)
 		return COMMAND_ERROR_USAGE;
 
 	dest = (void *)strtoul_suffix(argv[1], NULL, 0);
 	size = strtoul_suffix(argv[2], NULL, 0);
-	pagesize = strtoul_suffix(argv[3], NULL, 0);
 
-	s3c24x0_nand_load_image(dest, size, 0, pagesize);
+	s3c24x0_nand_load_image(dest, size, 0);
 
 	return 0;
 }
 
 static const __maybe_unused char cmd_nand_boot_test_help[] =
-"Usage: nand_boot_test <dest> <size> <pagesize>\n";
+"Usage: nand_boot_test <dest> <size>\n";
 
 BAREBOX_CMD_START(nand_boot_test)
 	.cmd		= do_nand_boot_test,
-- 
1.7.2.3


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Re: [PATCH] S3C24xx: NAND management changes to support booting from NAND

[Belisko Marek]

Hi Juergen,

On Thu, Feb 24, 2011 at 10:10 PM, Juergen Beisert <jbe@pengutronix.de> wrote:
> It seems there are more variants of the mini2440 in the wild than I ever
> thought.
>
> In order to support booting from NAND some important settings like NAND's page
> size and address cycle count must be known. These settings are provided by
> four external pins and can be read back from an register of the NFC. This
> patch set makes the S3C24xx NFC driver using these bits.
>
> Hopefully now all mini2440 variants can be booted from NAND without the need
> for special configurations.
Seems my board is somehow cursed. I apply those 2 patche up to the
next tree (also add slo wdown sdram timing)
but nothing helps. Board still doesn't boot from flash :(.
>
> Juergen
>
>
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
>

thanks,

marek

-- 
as simple and primitive as possible
-------------------------------------------------
Marek Belisko - OPEN-NANDRA
Freelance Developer

Ruska Nova Ves 219 | Presov, 08005 Slovak Republic
Tel: +421 915 052 184
skype: marekwhite
icq: 290551086
web: http://open-nandra.com

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[PATCH 1/2] mini2440: Add more info about possible SDRAM and flash devices

[Juergen Beisert]

From: Juergen Beisert <juergen@kreuzholzen.de>

It seems there are various combinations of the mini2440 in the wild. Not only
the SDRAM differ, but more important the NAND also differs.

Signed-off-by: Juergen Beisert <juergen@kreuzholzen.de>
---
 arch/arm/boards/mini2440/mini2440.c |   54 ++++++++++++++++++++++++----------
 1 files changed, 38 insertions(+), 16 deletions(-)

diff --git a/arch/arm/boards/mini2440/mini2440.c b/arch/arm/boards/mini2440/mini2440.c
index ab309a0..6842a79 100644
--- a/arch/arm/boards/mini2440/mini2440.c
+++ b/arch/arm/boards/mini2440/mini2440.c
@@ -316,23 +316,45 @@ This system is based on a Samsung S3C2440 CPU. The card is shipped with:
 - 12 MHz crystal reference
 - 32.768 kHz crystal reference
 - SDRAM 64 MiB (one bank only)
-   - HY57V561620 (two devices for 64 MiB to form a 32 bit bus)
-     - 4M x 16bit x 4 Banks Mobile SDRAM
-     - 8192 refresh cycles / 64 ms
-     - CL2\@100 MHz
-     - 133 MHz max
-     - collumn address size is 9 bits
-     - row address size is 13 bits
-   - MT48LC16M16 (two devices for 64 MiB to form a 32 bit bus)
-     - 4M x 16bit x 4 Banks Mobile SDRAM
-     - commercial & industrial type
-     - 8192 refresh cycles / 64 ms
-     - CL2\@100 MHz
-     - 133 MHz max
-     - collumn address size is 9 bits
-     - row address size is 13 bits
+   - Hynix SDRAM
+    - HY57V561620FTP-H (two devices for 64 MiB to form a 32 bit bus)
+      - 4M x 16bit x 4 Banks Mobile SDRAM
+      - 8192 refresh cycles / 64 ms
+      - CL2\@100 MHz
+      - 133 MHz max
+      - collumn address size is 9 bits
+      - row address size is 13 bits
+   - Micron SDRAM
+    - MT48LC16M16A2-75IT (two devices for 64 MiB to form a 32 bit bus)
+    - MT48LC16M16A2-7E (two devices for 64 MiB to form a 32 bit bus)
+      - 4M x 16bit x 4 Banks Mobile SDRAM
+      - commercial & industrial type
+      - 8192 refresh cycles / 64 ms
+      - CL2\@100 MHz
+      - 133 MHz max
+      - collumn address size is 9 bits
+      - row address size is 13 bits
 - NAND Flash 128MiB...1GiB
-   - K9Fxx08
+   - K9F1208U0C
+      - VID: 0xec, DID: 0x76
+      - Samsung/64MiB 3,3V 8-bit
+      - 512 + 8 bytes per page
+      - 16 kiB block size
+   - K9F1G08UOB
+      - VID: 0xec, DID: 0xf1
+      - Samsung/128MiB 3,3V 8-bit
+      - 2048 + 64 bytes per page
+      - 128 kiB block size
+   - K9F2G08UOB
+      - VID: 0xec, DID: 0xda
+      - Samsung/256MiB 3,3V 8-bit
+      - 2048 + 64 bytes per page
+      - 128 kiB block size
+   - K9K8G08U0A
+      - VID: 0xec, DID: 0xd3
+      - Samsung/1GiB 3,3V 8-bit
+      - 2048 + 64 bytes per page
+      - 128 kiB block size
 - NOR Flash (up to 22 address lines available)
    - AM29LV160DB, 2 MiB
    - SST39VF1601, 2 MiB
-- 
1.7.2.3


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