ARM: clps711x: p720t: Special driver for handling NAND memory is removed

This patch provide migration to using "gpio-nand" driver instead of using
special driver for handling NAND memory.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/mach-clps711x/include/mach/hardware.h

@@ -67,6 +67,9 @@
 #define CLPS711X_SRAM_BASE	CS6_PHYS_BASE
 #define CLPS711X_SRAM_SIZE	(48 * 1024)
 
+#define CLPS711X_SDRAM0_BASE	(0xc0000000)
+#define CLPS711X_SDRAM1_BASE	(0xd0000000)
+
 #if defined (CONFIG_ARCH_EDB7211)
 
 /* The extra 8 lines of the keyboard matrix are wired to chip select 3 */

arch/arm/mach-clps711x/p720t.c

@@ -26,6 +26,8 @@
 #include <linux/slab.h>
 #include <linux/leds.h>
 #include <linux/platform_device.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/nand-gpio.h>
 
 #include <mach/hardware.h>
 #include <asm/pgtable.h>
@@ -41,7 +43,50 @@
 
 #include "common.h"
 
-#define GPIO_USERLED	CLPS711X_GPIO(3, 0)
+#define P720T_USERLED		CLPS711X_GPIO(3, 0)
+#define P720T_NAND_CLE		CLPS711X_GPIO(4, 0)
+#define P720T_NAND_ALE		CLPS711X_GPIO(4, 1)
+#define P720T_NAND_NCE		CLPS711X_GPIO(4, 2)
+
+#define P720T_NAND_BASE		(CLPS711X_SDRAM1_BASE)
+
+static struct resource p720t_nand_resource[] __initdata = {
+	DEFINE_RES_MEM(P720T_NAND_BASE, SZ_4),
+};
+
+static struct mtd_partition p720t_nand_parts[] __initdata = {
+	{
+		.name	= "Flash partition 1",
+		.offset	= 0,
+		.size	= SZ_2M,
+	},
+	{
+		.name	= "Flash partition 2",
+		.offset	= MTDPART_OFS_APPEND,
+		.size	= MTDPART_SIZ_FULL,
+	},
+};
+
+static struct gpio_nand_platdata p720t_nand_pdata __initdata = {
+	.gpio_rdy	= -1,
+	.gpio_nce	= P720T_NAND_NCE,
+	.gpio_ale	= P720T_NAND_ALE,
+	.gpio_cle	= P720T_NAND_CLE,
+	.gpio_nwp	= -1,
+	.chip_delay	= 15,
+	.parts		= p720t_nand_parts,
+	.num_parts	= ARRAY_SIZE(p720t_nand_parts),
+};
+
+static struct platform_device p720t_nand_pdev __initdata = {
+	.name		= "gpio-nand",
+	.id		= -1,
+	.resource	= p720t_nand_resource,
+	.num_resources	= ARRAY_SIZE(p720t_nand_resource),
+	.dev		= {
+		.platform_data = &p720t_nand_pdata,
+	},
+};
 
 static void p720t_lcd_power_set(struct plat_lcd_data *pd, unsigned int power)
 {
@@ -127,7 +172,7 @@ static struct gpio_led p720t_gpio_leds[] = {
 	{
 		.name			= "User LED",
 		.default_trigger	= "heartbeat",
-		.gpio			= GPIO_USERLED,
+		.gpio			= P720T_USERLED,
 	},
 };
 
@@ -138,6 +183,7 @@ static struct gpio_led_platform_data p720t_gpio_led_pdata __initdata = {
 
 static void __init p720t_init(void)
 {
+	platform_device_register(&p720t_nand_pdev);
 	platform_device_register_data(&platform_bus, "platform-lcd", 0,
 				      &p720t_lcd_power_pdata,
 				      sizeof(p720t_lcd_power_pdata));

drivers/mtd/nand/Kconfig

@@ -79,12 +79,6 @@ config MTD_NAND_GPIO
 	help
 	  This enables a GPIO based NAND flash driver.
 
-config MTD_NAND_SPIA
-	tristate "NAND Flash device on SPIA board"
-	depends on ARCH_P720T
-	help
-	  If you had to ask, you don't have one. Say 'N'.
-
 config MTD_NAND_AMS_DELTA
 	tristate "NAND Flash device on Amstrad E3"
 	depends on MACH_AMS_DELTA

drivers/mtd/nand/Makefile

@@ -9,7 +9,6 @@ obj-$(CONFIG_MTD_NAND_IDS)		+= nand_ids.o
 obj-$(CONFIG_MTD_SM_COMMON) 		+= sm_common.o
 
 obj-$(CONFIG_MTD_NAND_CAFE)		+= cafe_nand.o
-obj-$(CONFIG_MTD_NAND_SPIA)		+= spia.o
 obj-$(CONFIG_MTD_NAND_AMS_DELTA)	+= ams-delta.o
 obj-$(CONFIG_MTD_NAND_DENALI)		+= denali.o
 obj-$(CONFIG_MTD_NAND_AU1550)		+= au1550nd.o

drivers/mtd/nand/spia.c

-/*
- *  drivers/mtd/nand/spia.c
- *
- *  Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
- *
- *
- *	10-29-2001 TG	change to support hardwarespecific access
- *			to controllines	(due to change in nand.c)
- *			page_cache added
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- *  Overview:
- *   This is a device driver for the NAND flash device found on the
- *   SPIA board which utilizes the Toshiba TC58V64AFT part. This is
- *   a 64Mibit (8MiB x 8 bits) NAND flash device.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/partitions.h>
-#include <asm/io.h>
-
-/*
- * MTD structure for SPIA board
- */
-static struct mtd_info *spia_mtd = NULL;
-
-/*
- * Values specific to the SPIA board (used with EP7212 processor)
- */
-#define SPIA_IO_BASE	0xd0000000	/* Start of EP7212 IO address space */
-#define SPIA_FIO_BASE	0xf0000000	/* Address where flash is mapped */
-#define SPIA_PEDR	0x0080	/*
-				 * IO offset to Port E data register
-				 * where the CLE, ALE and NCE pins
-				 * are wired to.
-				 */
-#define SPIA_PEDDR	0x00c0	/*
-				 * IO offset to Port E data direction
-				 * register so we can control the IO
-				 * lines.
-				 */
-
-/*
- * Module stuff
- */
-
-static int spia_io_base = SPIA_IO_BASE;
-static int spia_fio_base = SPIA_FIO_BASE;
-static int spia_pedr = SPIA_PEDR;
-static int spia_peddr = SPIA_PEDDR;
-
-module_param(spia_io_base, int, 0);
-module_param(spia_fio_base, int, 0);
-module_param(spia_pedr, int, 0);
-module_param(spia_peddr, int, 0);
-
-/*
- * Define partitions for flash device
- */
-static const struct mtd_partition partition_info[] = {
-	{
-	 .name = "SPIA flash partition 1",
-	 .offset = 0,
-	 .size = 2 * 1024 * 1024},
-	{
-	 .name = "SPIA flash partition 2",
-	 .offset = 2 * 1024 * 1024,
-	 .size = 6 * 1024 * 1024}
-};
-
-#define NUM_PARTITIONS 2
-
-/*
- *	hardware specific access to control-lines
- *
- *	ctrl:
- *	NAND_CNE: bit 0 -> bit 2
- *	NAND_CLE: bit 1 -> bit 0
- *	NAND_ALE: bit 2 -> bit 1
- */
-static void spia_hwcontrol(struct mtd_info *mtd, int cmd)
-{
-	struct nand_chip *chip = mtd->priv;
-
-	if (ctrl & NAND_CTRL_CHANGE) {
-		void __iomem *addr = spia_io_base + spia_pedr;
-		unsigned char bits;
-
-		bits = (ctrl & NAND_CNE) << 2;
-		bits |= (ctrl & NAND_CLE | NAND_ALE) >> 1;
-		writeb((readb(addr) & ~0x7) | bits, addr);
-	}
-
-	if (cmd != NAND_CMD_NONE)
-		writeb(cmd, chip->IO_ADDR_W);
-}
-
-/*
- * Main initialization routine
- */
-static int __init spia_init(void)
-{
-	struct nand_chip *this;
-
-	/* Allocate memory for MTD device structure and private data */
-	spia_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
-	if (!spia_mtd) {
-		printk("Unable to allocate SPIA NAND MTD device structure.\n");
-		return -ENOMEM;
-	}
-
-	/* Get pointer to private data */
-	this = (struct nand_chip *)(&spia_mtd[1]);
-
-	/* Initialize structures */
-	memset(spia_mtd, 0, sizeof(struct mtd_info));
-	memset(this, 0, sizeof(struct nand_chip));
-
-	/* Link the private data with the MTD structure */
-	spia_mtd->priv = this;
-	spia_mtd->owner = THIS_MODULE;
-
-	/*
-	 * Set GPIO Port E control register so that the pins are configured
-	 * to be outputs for controlling the NAND flash.
-	 */
-	(*(volatile unsigned char *)(spia_io_base + spia_peddr)) = 0x07;
-
-	/* Set address of NAND IO lines */
-	this->IO_ADDR_R = (void __iomem *)spia_fio_base;
-	this->IO_ADDR_W = (void __iomem *)spia_fio_base;
-	/* Set address of hardware control function */
-	this->cmd_ctrl = spia_hwcontrol;
-	/* 15 us command delay time */
-	this->chip_delay = 15;
-
-	/* Scan to find existence of the device */
-	if (nand_scan(spia_mtd, 1)) {
-		kfree(spia_mtd);
-		return -ENXIO;
-	}
-
-	/* Register the partitions */
-	mtd_device_register(spia_mtd, partition_info, NUM_PARTITIONS);
-
-	/* Return happy */
-	return 0;
-}
-
-module_init(spia_init);
-
-/*
- * Clean up routine
- */
-static void __exit spia_cleanup(void)
-{
-	/* Release resources, unregister device */
-	nand_release(spia_mtd);
-
-	/* Free the MTD device structure */
-	kfree(spia_mtd);
-}
-
-module_exit(spia_cleanup);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Steven J. Hill <sjhill@realitydiluted.com");
-MODULE_DESCRIPTION("Board-specific glue layer for NAND flash on SPIA board");