Move NAND driver from rb1xx to adm5120, rbmipsnand fixed by David Goodenough, thanks !

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6991 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 158 insertions, 2 deletions

diff --git a/target/linux/adm5120-2.6/config/default b/target/linux/adm5120-2.6/config/default
index 1643d5bd5..38400b935 100644
--- a/target/linux/adm5120-2.6/config/default
+++ b/target/linux/adm5120-2.6/config/default
@@ -138,7 +138,7 @@ CONFIG_MTD=y
 # CONFIG_MTD_ABSENT is not set
 CONFIG_MTD_ADM5120=y
 CONFIG_MTD_BLOCK=y
-# CONFIG_MTD_BLOCK2MTD is not set
+CONFIG_MTD_BLOCK2MTD=y
 CONFIG_MTD_CFI=y
 # CONFIG_MTD_CFI_ADV_OPTIONS is not set
 CONFIG_MTD_CFI_AMDSTD=y
@@ -168,6 +168,13 @@ CONFIG_MTD_MAP_BANK_WIDTH_4=y
 # CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
 # CONFIG_MTD_MTDRAM is not set
 CONFIG_MTD_MYLOADER_PARTS=y
+CONFIG_MTD_NAND=y
+# CONFIG_MTD_NAND_DISKONCHIP is not set
+# CONFIG_MTD_NAND_ECC_SMC is not set
+CONFIG_MTD_NAND_IDS=y
+# CONFIG_MTD_NAND_NANDSIM is not set
+CONFIG_MTD_NAND_RB100=y
+# CONFIG_MTD_NAND_VERIFY_WRITE is not set
 # CONFIG_MTD_OBSOLETE_CHIPS is not set
 # CONFIG_MTD_ONENAND is not set
 CONFIG_MTD_PARTITIONS=y
@@ -178,7 +185,6 @@ CONFIG_MTD_PARTITIONS=y
 # CONFIG_MTD_PMC551 is not set
 # CONFIG_MTD_RAM is not set
 # CONFIG_MTD_REDBOOT_PARTS is not set
-CONFIG_MTD_MYLOADER_PARTS=y
 # CONFIG_MTD_ROM is not set
 # CONFIG_MTD_SLRAM is not set
 CONFIG_NETFILTER_XT_MATCH_QUOTA=m
@@ -233,6 +239,7 @@ CONFIG_SYN_COOKIES=y
 CONFIG_SYS_HAS_CPU_MIPS32_R1=y
 CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y
 CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
+CONFIG_SYS_SUPPORTS_BIG_ENDIAN=y
 CONFIG_SYS_SUPPORTS_LITTLE_ENDIAN=y
 CONFIG_TMPFS_POSIX_ACL=y
 # CONFIG_TOSHIBA_JMR3927 is not set
@@ -259,4 +266,13 @@ CONFIG_USB_ADM5120_HCD=y
 # CONFIG_USB_USBNET_MII is not set
 # CONFIG_USB_ZD1201 is not set
 CONFIG_VM_EVENT_COUNTERS=y
+# CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED is not set
+CONFIG_YAFFS_AUTO_YAFFS2=y
+# CONFIG_YAFFS_DISABLE_LAZY_LOAD is not set
+# CONFIG_YAFFS_DISABLE_WIDE_TNODES is not set
+# CONFIG_YAFFS_DOES_ECC is not set
+CONFIG_YAFFS_FS=y
+CONFIG_YAFFS_SHORT_NAMES_IN_RAM=y
+CONFIG_YAFFS_YAFFS1=y
+CONFIG_YAFFS_YAFFS2=y
 # CONFIG_ZD1211RW is not set
diff --git a/target/linux/adm5120-2.6/files/drivers/mtd/nand/rbmipsnand.c b/target/linux/adm5120-2.6/files/drivers/mtd/nand/rbmipsnand.c
new file mode 100644
index 000000000..f08655290
--- /dev/null
+++ b/target/linux/adm5120-2.6/files/drivers/mtd/nand/rbmipsnand.c
@@ -0,0 +1,111 @@
+/*==============================================================================*/
+/* rbmipsnand.c                                                                 */
+/* This module is derived from the 2.4 driver shipped by Microtik for their     */
+/* Routerboard 1xx and 5xx series boards.  It provides support for the built in */
+/* NAND flash on the Routerboard 1xx series boards for Linux 2.6.19+.           */
+/* Licence: Original Microtik code seems not to have a licence.                 */
+/*          Rewritten code all GPL V2.                                          */
+/* Copyright(C) 2007 david.goodenough@linkchoose.co.uk (for rewriten code)      */
+/*==============================================================================*/
+
+#include <linux/init.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/bootinfo.h>
+
+#define SMEM1_BASE 0x10000000   // from ADM5120 documentation
+#define SMEM1(x) (*((volatile unsigned char *) (KSEG1ADDR(SMEM1_BASE) + x)))
+
+#define NAND_RW_REG	0x0	//data register
+#define NAND_SET_CEn	0x1	//CE# low
+#define NAND_CLR_CEn	0x2	//CE# high
+#define NAND_CLR_CLE	0x3	//CLE low
+#define NAND_SET_CLE	0x4	//CLE high
+#define NAND_CLR_ALE	0x5	//ALE low
+#define NAND_SET_ALE	0x6	//ALE high
+#define NAND_SET_SPn	0x7	//SP# low (use spare area)
+#define NAND_CLR_SPn	0x8	//SP# high (do not use spare area)
+#define NAND_SET_WPn	0x9	//WP# low
+#define NAND_CLR_WPn	0xA	//WP# high
+#define NAND_STS_REG	0xB	//Status register
+
+#define MEM32(x) *((volatile unsigned *) (x))
+static void __iomem *p_nand;
+
+static int rb100_dev_ready(struct mtd_info *mtd) {
+    return SMEM1(NAND_STS_REG) & 0x80;
+}
+
+static void rbmips_hwcontrol100(struct mtd_info *mtd, int cmd, unsigned int ctrl) {
+    struct nand_chip *chip = mtd->priv;
+    if (ctrl & NAND_CTRL_CHANGE) {
+        SMEM1((( ctrl & NAND_CLE) ? NAND_SET_CLE : NAND_CLR_CLE)) = 0x01;
+        SMEM1((( ctrl & NAND_ALE) ? NAND_SET_ALE : NAND_CLR_ALE)) = 0x01;
+        SMEM1((( ctrl & NAND_NCE) ? NAND_SET_CEn : NAND_CLR_CEn)) = 0x01;
+        }
+    if( cmd != NAND_CMD_NONE)
+        writeb( cmd, chip->IO_ADDR_W);
+}
+
+static struct mtd_partition partition_info[] = {
+    {
+        name: "RouterBoard NAND Boot",
+        offset: 0,
+	size: 4 * 1024 * 1024
+    },
+    {
+        name: "RouterBoard NAND Main",
+	offset: MTDPART_OFS_NXTBLK,
+	size: MTDPART_SIZ_FULL
+    }
+};
+
+static struct mtd_info rmtd;
+static struct nand_chip rnand;
+
+static unsigned init_ok = 0;
+
+unsigned get_rbnand_block_size(void) {
+	return init_ok ? rmtd.writesize : 0;
+}
+
+EXPORT_SYMBOL(get_rbnand_block_size);
+
+int __init rbmips_init(void) {
+	memset(&rmtd, 0, sizeof(rmtd));
+	memset(&rnand, 0, sizeof(rnand));
+	printk("RB1xx nand\n");
+	MEM32(0xB2000064) = 0x100;
+	MEM32(0xB2000008) = 0x1;
+	SMEM1(NAND_SET_SPn) = 0x01;
+	SMEM1(NAND_CLR_WPn) = 0x01;
+	rnand.IO_ADDR_R = (unsigned char *)KSEG1ADDR(SMEM1_BASE);
+	rnand.IO_ADDR_W = rnand.IO_ADDR_R;
+	rnand.cmd_ctrl = rbmips_hwcontrol100;
+	rnand.dev_ready = rb100_dev_ready;
+	p_nand = (void __iomem *)ioremap(( unsigned long)SMEM1_BASE, 0x1000);
+	if (!p_nand) {
+		printk("RB1xx nand Unable ioremap buffer");
+		return -ENXIO;
+	}
+	rnand.ecc.mode = NAND_ECC_SOFT;
+	rnand.chip_delay = 25;
+	rnand.options |= NAND_NO_AUTOINCR;
+	rmtd.priv = &rnand;
+	if (nand_scan(&rmtd, 1) && nand_scan(&rmtd, 1)
+	    && nand_scan(&rmtd, 1)  && nand_scan(&rmtd, 1)) {
+		printk("RB1xxx nand device not found");
+		iounmap ((void *)p_nand);
+		return -ENXIO;
+	}
+	add_mtd_partitions(&rmtd, partition_info, 2);
+	init_ok = 1;
+	return 0;
+}
+
+module_init(rbmips_init);
+
diff --git a/target/linux/adm5120-2.6/patches/500-Nand.patch b/target/linux/adm5120-2.6/patches/500-Nand.patch
new file mode 100644
index 000000000..05beb2024
--- /dev/null
+++ b/target/linux/adm5120-2.6/patches/500-Nand.patch
@@ -0,0 +1,29 @@
+diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
+index cfe288a..c528024 100644
+--- a/drivers/mtd/nand/Kconfig
++++ b/drivers/mtd/nand/Kconfig
+@@ -55,6 +55,12 @@ config MTD_NAND_TOTO
+ 	help
+ 	  Support for NAND flash on Texas Instruments Toto platform.
+ 
++config MTD_NAND_RB100
++	tristate "NAND Flash device on RB100 board"
++	depends on MTD_NAND
++	help
++	  Support for NAND flash on RB100 platform.
++
+ config MTD_NAND_IDS
+ 	tristate
+ 
+diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
+index 4174202..2be57c1 100644
+--- a/drivers/mtd/nand/Makefile
++++ b/drivers/mtd/nand/Makefile
+@@ -8,6 +8,7 @@ obj-$(CONFIG_MTD_NAND_IDS)		+= nand_ids.
+ 
+ obj-$(CONFIG_MTD_NAND_SPIA)		+= spia.o
+ obj-$(CONFIG_MTD_NAND_TOTO)		+= toto.o
++obj-$(CONFIG_MTD_NAND_RB100)		+= rbmipsnand.o
+ obj-$(CONFIG_MTD_NAND_AUTCPU12)		+= autcpu12.o
+ obj-$(CONFIG_MTD_NAND_EDB7312)		+= edb7312.o
+ obj-$(CONFIG_MTD_NAND_AU1550)		+= au1550nd.o