Use the generic NAND driver

SVN-Revision: 9049

1 files changed, 132 insertions, 73 deletions

diff --git a/target/linux/rb532/files/arch/mips/rb500/devices.c b/target/linux/rb532/files/arch/mips/rb500/devices.c
index be40106d80..d8342feb19 100644
--- a/target/linux/rb532/files/arch/mips/rb500/devices.c
+++ b/target/linux/rb532/files/arch/mips/rb500/devices.c
@@ -2,6 +2,7 @@
  *  RouterBoard 500 Platform devices
  *
  *  Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
+ *  Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -12,17 +13,15 @@
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  *  GNU General Public License for more details.
- *
- *  $Id$
  */
 #include <linux/kernel.h>
 #include <linux/init.h>
-#include <linux/module.h>
 #include <linux/ctype.h>
 #include <linux/string.h>
 #include <linux/platform_device.h>
-#include <asm/unaligned.h>
-#include <asm/io.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
 
 #include <asm/rc32434/rc32434.h>
 #include <asm/rc32434/dma.h>
@@ -31,61 +30,65 @@
 #include <asm/rc32434/rb.h>
 
 #define ETH0_DMA_RX_IRQ   	GROUP1_IRQ_BASE + 0
-#define ETH0_DMA_TX_IRQ   	GROUP1_IRQ_BASE + 1 
+#define ETH0_DMA_TX_IRQ   	GROUP1_IRQ_BASE + 1
 #define ETH0_RX_OVR_IRQ   	GROUP3_IRQ_BASE + 9
 #define ETH0_TX_UND_IRQ   	GROUP3_IRQ_BASE + 10
 
 #define ETH0_RX_DMA_ADDR  (DMA0_PhysicalAddress + 0*DMA_CHAN_OFFSET)
 #define ETH0_TX_DMA_ADDR  (DMA0_PhysicalAddress + 1*DMA_CHAN_OFFSET)
 
+/* NAND definitions */
+#define MEM32(x) *((volatile unsigned *) (x))
+
+#define GPIO_RDY (1 << 0x08)
+#define GPIO_WPX (1 << 0x09)
+#define GPIO_ALE (1 << 0x0a)
+#define GPIO_CLE (1 << 0x0b)
+
+extern char* board_type;
+
 static struct resource korina_dev0_res[] = {
 	{
-		.name  = "korina_regs",
+		.name = "korina_regs",
 		.start = ETH0_PhysicalAddress,
-		.end   = ETH0_PhysicalAddress + sizeof(ETH_t),
+		.end = ETH0_PhysicalAddress + sizeof(ETH_t),
 		.flags = IORESOURCE_MEM,
-	},
-	{
-		.name  = "korina_rx",
+	 }, {
+		.name = "korina_rx",
 		.start = ETH0_DMA_RX_IRQ,
-		.end   = ETH0_DMA_RX_IRQ,
+		.end = ETH0_DMA_RX_IRQ,
 		.flags = IORESOURCE_IRQ
-	},
-	{
-		.name  = "korina_tx",
+	}, {
+		.name = "korina_tx",
 		.start = ETH0_DMA_TX_IRQ,
-		.end   = ETH0_DMA_TX_IRQ,
+		.end = ETH0_DMA_TX_IRQ,
 		.flags = IORESOURCE_IRQ
-	},
-	{
-		.name  = "korina_ovr",
+	}, {
+		.name = "korina_ovr",
 		.start = ETH0_RX_OVR_IRQ,
-		.end   = ETH0_RX_OVR_IRQ,
+		.end = ETH0_RX_OVR_IRQ,
 		.flags = IORESOURCE_IRQ
-	},
-	{
-		.name  = "korina_und",
+	}, {
+		.name = "korina_und",
 		.start = ETH0_TX_UND_IRQ,
-		.end   = ETH0_TX_UND_IRQ,
+		.end = ETH0_TX_UND_IRQ,
 		.flags = IORESOURCE_IRQ
-	},
-	{
-		.name  = "korina_dma_rx",
+	}, {
+		.name = "korina_dma_rx",
 		.start = ETH0_RX_DMA_ADDR,
-		.end   = ETH0_RX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
+		.end = ETH0_RX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
 		.flags = IORESOURCE_MEM,
-	},
-	{
-		.name  = "korina_dma_tx",
+	 }, {
+		.name = "korina_dma_tx",
 		.start = ETH0_TX_DMA_ADDR,
-		.end   = ETH0_TX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
+		.end = ETH0_TX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
 		.flags = IORESOURCE_MEM,
-	}
+	 }
 };
 
 static struct korina_device korina_dev0_data = {
 	.name = "korina0",
-	.mac = { 0xde, 0xca, 0xff, 0xc0, 0xff, 0xee }
+	.mac = {0xde, 0xca, 0xff, 0xc0, 0xff, 0xee}
 };
 
 static struct platform_device korina_dev0 = {
@@ -96,18 +99,16 @@ static struct platform_device korina_dev0 = {
 	.num_resources = ARRAY_SIZE(korina_dev0_res),
 };
 
-
 #define CF_GPIO_NUM 13
 
 static struct resource cf_slot0_res[] = {
 	{
-		.name  = "cf_membase",
+		.name = "cf_membase",
 		.flags = IORESOURCE_MEM
-	},
-	{
-		.name  = "cf_irq",
-		.start = (8 + 4 * 32 + CF_GPIO_NUM),  /* 149 */
-		.end   = (8 + 4 * 32 + CF_GPIO_NUM),
+	}, {
+		.name = "cf_irq",
+		.start = (8 + 4 * 32 + CF_GPIO_NUM),	/* 149 */
+		.end = (8 + 4 * 32 + CF_GPIO_NUM),
 		.flags = IORESOURCE_IRQ
 	}
 };
@@ -125,55 +126,92 @@ static struct platform_device cf_slot0 = {
 };
 
 /* Resources and device for NAND.  There is no data needed and no irqs, so just define the memory used. */
+int rb500_dev_ready(struct mtd_info *mtd)
+{
+        return MEM32(IDT434_REG_BASE + GPIOD) & GPIO_RDY;
+}
+
+void rb500_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+{
+        struct nand_chip *chip = mtd->priv;
+        unsigned char orbits, nandbits;
+
+        if (ctrl & NAND_CTRL_CHANGE) {
+
+                orbits = (ctrl & NAND_CLE) << 1;
+                orbits |= (ctrl & NAND_ALE) >> 1;
+
+                nandbits = (~ctrl & NAND_CLE) << 1;
+                nandbits |= (~ctrl & NAND_ALE) >> 1;
+
+                changeLatchU5(orbits, nandbits);
+        }
+        if (cmd != NAND_CMD_NONE)
+                writeb(cmd, chip->IO_ADDR_W);
+}
+
 static struct resource nand_slot0_res[] = {
 	{
 		.name = "nand_membase",
-		.start = 0x18a20000,
-		.end = (0x18a20000+0x1000)-1,
-		.flags = IORESOURCE_MEM	
+		.flags = IORESOURCE_MEM
 	}
 };
- 
+
+struct platform_nand_data rb500_nand_data = {
+	.ctrl.dev_ready = rb500_dev_ready,
+	.ctrl.cmd_ctrl	= rb500_cmd_ctrl,
+};
+
 static struct platform_device nand_slot0 = {
 	.id = 0,
-	.name = "rb500-nand",
+	.name = "gen_nand",
 	.resource = nand_slot0_res,
 	.num_resources = ARRAY_SIZE(nand_slot0_res),
+	.dev.platform_data = &rb500_nand_data,
 };
 
-static struct platform_device rb500led = {
-	.name = "rb500-led",
-	.id = 0,
+static struct mtd_partition rb500_partition_info[] = {
+	{
+		.name = "Routerboard NAND boot",
+		.offset = 0,
+		.size = 4 * 1024 * 1024,
+	}, {
+		.name = "rootfs",
+		.offset = MTDPART_OFS_NXTBLK,
+		.size = MTDPART_SIZ_FULL,
+	}
 };
 
 
 static struct platform_device *rb500_devs[] = {
 	&korina_dev0,
 	&nand_slot0,
-	&cf_slot0,
-	&rb500led
+	&cf_slot0
 };
 
-static void __init parse_mac_addr(char* macstr)
+static void __init parse_mac_addr(char *macstr)
 {
 	int i, j;
 	unsigned char result, value;
-	
-	for (i=0; i<6; i++) {
+
+	for (i = 0; i < 6; i++) {
 		result = 0;
-		if (i != 5 && *(macstr+2) != ':') {
+
+		if (i != 5 && *(macstr + 2) != ':')
 			return;
-		}				
-		for (j=0; j<2; j++) {
-			if (isxdigit(*macstr) && (value = isdigit(*macstr) ? *macstr-'0' : 
-						  toupper(*macstr)-'A'+10) < 16) {
-				result = result*16 + value;
+
+		for (j = 0; j < 2; j++) {
+			if (isxdigit(*macstr)
+			    && (value =
+				isdigit(*macstr) ? *macstr -
+				'0' : toupper(*macstr) - 'A' + 10) < 16) {
+				result = result * 16 + value;
 				macstr++;
-			} 
-			else return;
+			} else
+				return;
 		}
-		
-		macstr++; 
+
+		macstr++;
 		korina_dev0_data.mac[i] = result;
 	}
 }
@@ -187,6 +225,17 @@ static void __init parse_mac_addr(char* macstr)
 #define CFG_DC_DEVC       0x8
 #define CFG_DC_DEVTC      0xC
 
+/* NAND definitions */
+#define NAND_CHIP_DELAY	25
+
+static void __init rb500_nand_setup(void)
+{
+	if (!strcmp(board_type, "500r5"))
+		changeLatchU5(LO_FOFF | LO_CEX, LO_ULED | LO_ALE | LO_CLE | LO_WPX);
+        else
+		changeLatchU5(LO_WPX | LO_FOFF | LO_CEX, LO_ULED | LO_ALE | LO_CLE);
+}
+
 
 static int __init plat_setup_devices(void)
 {
@@ -194,25 +243,35 @@ static int __init plat_setup_devices(void)
 	if (!readl(CFG_DC_DEV1 + CFG_DC_DEVMASK))
 		rb500_devs[1] = NULL;
 	else {
-		cf_slot0_res[0].start = readl(CFG_DC_DEV1 + CFG_DC_DEVBASE);
+		cf_slot0_res[0].start =
+		    readl(CFG_DC_DEV1 + CFG_DC_DEVBASE);
 		cf_slot0_res[0].end = cf_slot0_res[0].start + 0x1000;
 	}
-	
-	/* There is always a NAND device */
-	nand_slot0_res[0].start = readl( CFG_DC_DEV2 + CFG_DC_DEVBASE);
+
+	/* Initialise the NAND device */
+	rb500_nand_setup();
+
+	/* Read the NAND resources from the device controller */
+	nand_slot0_res[0].start = readl(CFG_DC_DEV2 + CFG_DC_DEVBASE);
 	nand_slot0_res[0].end = nand_slot0_res[0].start + 0x1000;
-		
+
+	/* Setup NAND specific settings */
+	rb500_nand_data.chip.nr_chips = 1;
+	rb500_nand_data.chip.nr_partitions = ARRAY_SIZE(rb500_partition_info);
+	rb500_nand_data.chip.partitions = rb500_partition_info;
+	rb500_nand_data.chip.chip_delay = NAND_CHIP_DELAY;
+	rb500_nand_data.chip.options = NAND_NO_AUTOINCR;
+
 	return platform_add_devices(rb500_devs, ARRAY_SIZE(rb500_devs));
 }
 
 static int __init setup_kmac(char *s)
 {
-    printk("korina mac = %s\n",s);
+	printk("korina mac = %s\n", s);
 	parse_mac_addr(s);
-    return 0;
+	return 0;
 }
 
 __setup("kmac=", setup_kmac);
-arch_initcall(plat_setup_devices);
-
 
+arch_initcall(plat_setup_devices);