[PATCH v3 13/18] ARM: clps711x: p720t: Special driver for handling NAND memory is removed
Alexander Shiyan
shc_work at mail.ru
Sat Nov 17 08:57:19 EST 2012
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 at mail.ru>
---
arch/arm/mach-clps711x/include/mach/hardware.h | 3 +
arch/arm/mach-clps711x/p720t.c | 50 +++++++-
drivers/mtd/nand/Kconfig | 6 -
drivers/mtd/nand/Makefile | 1 -
drivers/mtd/nand/spia.c | 176 ------------------------
5 files changed, 51 insertions(+), 185 deletions(-)
delete mode 100644 drivers/mtd/nand/spia.c
diff --git a/arch/arm/mach-clps711x/include/mach/hardware.h b/arch/arm/mach-clps711x/include/mach/hardware.h
index 4e273f2..6acf714 100644
--- a/arch/arm/mach-clps711x/include/mach/hardware.h
+++ b/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 */
diff --git a/arch/arm/mach-clps711x/p720t.c b/arch/arm/mach-clps711x/p720t.c
index 34c8ee9..e25f10e 100644
--- a/arch/arm/mach-clps711x/p720t.c
+++ b/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));
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 582c283..721513e 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -93,12 +93,6 @@ 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
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index d2bd10b..eb827a2 100644
--- a/drivers/mtd/nand/Makefile
+++ b/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_DENALI_PCI) += denali_pci.o
diff --git a/drivers/mtd/nand/spia.c b/drivers/mtd/nand/spia.c
deleted file mode 100644
index bef76cd..0000000
--- a/drivers/mtd/nand/spia.c
+++ /dev/null
@@ -1,176 +0,0 @@
-/*
- * drivers/mtd/nand/spia.c
- *
- * Copyright (C) 2000 Steven J. Hill (sjhill at 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 at realitydiluted.com");
-MODULE_DESCRIPTION("Board-specific glue layer for NAND flash on SPIA board");
--
1.7.8.6
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