[PATCH RESEND 05/15] ARM: clps711x: autcpu12: Special driver for handling memory is removed
Alexander Shiyan
shc_work at mail.ru
Wed Jun 5 01:59:13 EDT 2013
This patch provide migration to using "mtd-ram" driver instead of using
special driver for handling NVRAM memory.
Signed-off-by: Alexander Shiyan <shc_work at mail.ru>
---
arch/arm/mach-clps711x/board-autcpu12.c | 68 ++++++++++---
arch/arm/mach-clps711x/include/mach/autcpu12.h | 2 -
drivers/mtd/maps/Kconfig | 7 --
drivers/mtd/maps/Makefile | 1 -
drivers/mtd/maps/autcpu12-nvram.c | 129 -------------------------
5 files changed, 56 insertions(+), 151 deletions(-)
delete mode 100644 drivers/mtd/maps/autcpu12-nvram.c
diff --git a/arch/arm/mach-clps711x/board-autcpu12.c b/arch/arm/mach-clps711x/board-autcpu12.c
index 3e22d0b..91a3ab5 100644
--- a/arch/arm/mach-clps711x/board-autcpu12.c
+++ b/arch/arm/mach-clps711x/board-autcpu12.c
@@ -27,6 +27,7 @@
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/mtd/physmap.h>
+#include <linux/mtd/plat-ram.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/nand-gpio.h>
#include <linux/platform_device.h>
@@ -49,6 +50,9 @@
/* NOR flash */
#define AUTCPU12_FLASH_BASE (CS0_PHYS_BASE)
+/* NVRAM */
+#define AUTCPU12_NVRAM_BASE (CS1_PHYS_BASE + 0x02000000)
+
/* SmartMedia flash */
#define AUTCPU12_SMC_BASE (CS1_PHYS_BASE + 0x06000000)
#define AUTCPU12_SMC_SEL_BASE (AUTCPU12_SMC_BASE + 0x10)
@@ -74,17 +78,6 @@ static struct resource autcpu12_cs8900_resource[] __initdata = {
DEFINE_RES_IRQ(AUTCPU12_CS8900_IRQ),
};
-static struct resource autcpu12_nvram_resource[] __initdata = {
- DEFINE_RES_MEM_NAMED(AUTCPU12_PHYS_NVRAM, SZ_128K, "SRAM"),
-};
-
-static struct platform_device autcpu12_nvram_pdev __initdata = {
- .name = "autcpu12_nvram",
- .id = -1,
- .resource = autcpu12_nvram_resource,
- .num_resources = ARRAY_SIZE(autcpu12_nvram_resource),
-};
-
static struct resource autcpu12_nand_resource[] __initdata = {
DEFINE_RES_MEM(AUTCPU12_SMC_BASE, SZ_16),
};
@@ -194,6 +187,57 @@ static struct platform_device autcpu12_flash_pdev __initdata = {
},
};
+static struct resource autcpu12_nvram_resource[] __initdata = {
+ DEFINE_RES_MEM(AUTCPU12_NVRAM_BASE, 0),
+};
+
+static struct platdata_mtd_ram autcpu12_nvram_pdata = {
+ .bankwidth = 4,
+};
+
+static struct platform_device autcpu12_nvram_pdev __initdata = {
+ .name = "mtd-ram",
+ .id = 0,
+ .resource = autcpu12_nvram_resource,
+ .num_resources = ARRAY_SIZE(autcpu12_nvram_resource),
+ .dev = {
+ .platform_data = &autcpu12_nvram_pdata,
+ },
+};
+
+static void __init autcpu12_nvram_init(void)
+{
+ void __iomem *nvram;
+ unsigned int save[2];
+ resource_size_t nvram_size = SZ_128K;
+
+ /*
+ * Check for 32K/128K
+ * Read ofs 0K
+ * Read ofs 64K
+ * Write complement to ofs 64K
+ * Read and check result on ofs 0K
+ * Restore contents
+ */
+ nvram = ioremap(autcpu12_nvram_resource[0].start, SZ_128K);
+ if (nvram) {
+ save[0] = readl(nvram + 0);
+ save[1] = readl(nvram + SZ_64K);
+ writel(~save[0], nvram + SZ_64K);
+ if (readl(nvram + 0) != save[0]) {
+ writel(save[0], nvram + 0);
+ nvram_size = SZ_32K;
+ } else
+ writel(save[1], nvram + SZ_64K);
+ iounmap(nvram);
+
+ autcpu12_nvram_resource[0].end =
+ autcpu12_nvram_resource[0].start + nvram_size - 1;
+ platform_device_register(&autcpu12_nvram_pdev);
+ } else
+ pr_err("Failed to remap NVRAM resource\n");
+}
+
static void __init autcpu12_init(void)
{
clps711x_devices_init();
@@ -202,7 +246,7 @@ static void __init autcpu12_init(void)
platform_device_register_simple("cs89x0", 0, autcpu12_cs8900_resource,
ARRAY_SIZE(autcpu12_cs8900_resource));
platform_device_register(&autcpu12_mmgpio_pdev);
- platform_device_register(&autcpu12_nvram_pdev);
+ autcpu12_nvram_init();
}
static void __init autcpu12_init_late(void)
diff --git a/arch/arm/mach-clps711x/include/mach/autcpu12.h b/arch/arm/mach-clps711x/include/mach/autcpu12.h
index 0db6f18..0e00148 100644
--- a/arch/arm/mach-clps711x/include/mach/autcpu12.h
+++ b/arch/arm/mach-clps711x/include/mach/autcpu12.h
@@ -31,8 +31,6 @@
*/
#define AUTCPU12_PHYS_CHAR_LCD CS1_PHYS_BASE +0x00000000 /* physical */
-#define AUTCPU12_PHYS_NVRAM CS1_PHYS_BASE +0x02000000 /* physical */
-
#define AUTCPU12_PHYS_CSAUX1 CS1_PHYS_BASE +0x04000000 /* physical */
#define AUTCPU12_PHYS_CAN CS1_PHYS_BASE +0x08000000 /* physical */
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index bed9d58..8b27ca0 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -297,13 +297,6 @@ config MTD_IXP4XX
IXDP425 and Coyote. If you have an IXP4xx based board and
would like to use the flash chips on it, say 'Y'.
-config MTD_AUTCPU12
- bool "NV-RAM mapping AUTCPU12 board"
- depends on ARCH_AUTCPU12
- help
- This enables access to the NV-RAM on autronix autcpu12 board.
- If you have such a board, say 'Y'.
-
config MTD_IMPA7
tristate "JEDEC Flash device mapped on impA7"
depends on ARM && MTD_JEDECPROBE
diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index 395a124..9fdbd4b 100644
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -32,7 +32,6 @@ obj-$(CONFIG_MTD_VMAX) += vmax301.o
obj-$(CONFIG_MTD_SCx200_DOCFLASH)+= scx200_docflash.o
obj-$(CONFIG_MTD_SOLUTIONENGINE)+= solutionengine.o
obj-$(CONFIG_MTD_PCI) += pci.o
-obj-$(CONFIG_MTD_AUTCPU12) += autcpu12-nvram.o
obj-$(CONFIG_MTD_IMPA7) += impa7.o
obj-$(CONFIG_MTD_UCLINUX) += uclinux.o
obj-$(CONFIG_MTD_NETtel) += nettel.o
diff --git a/drivers/mtd/maps/autcpu12-nvram.c b/drivers/mtd/maps/autcpu12-nvram.c
deleted file mode 100644
index c3525d2..0000000
--- a/drivers/mtd/maps/autcpu12-nvram.c
+++ /dev/null
@@ -1,129 +0,0 @@
-/*
- * NV-RAM memory access on autcpu12
- * (C) 2002 Thomas Gleixner (gleixner at autronix.de)
- *
- * 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
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#include <linux/err.h>
-#include <linux/sizes.h>
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-
-struct autcpu12_nvram_priv {
- struct mtd_info *mtd;
- struct map_info map;
-};
-
-static int autcpu12_nvram_probe(struct platform_device *pdev)
-{
- map_word tmp, save0, save1;
- struct resource *res;
- struct autcpu12_nvram_priv *priv;
-
- priv = devm_kzalloc(&pdev->dev,
- sizeof(struct autcpu12_nvram_priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
-
- platform_set_drvdata(pdev, priv);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "failed to get memory resource\n");
- return -ENOENT;
- }
-
- priv->map.bankwidth = 4;
- priv->map.phys = res->start;
- priv->map.size = resource_size(res);
- priv->map.virt = devm_ioremap_resource(&pdev->dev, res);
- strcpy((char *)priv->map.name, res->name);
- if (IS_ERR(priv->map.virt))
- return PTR_ERR(priv->map.virt);
-
- simple_map_init(&priv->map);
-
- /*
- * Check for 32K/128K
- * read ofs 0
- * read ofs 0x10000
- * Write complement to ofs 0x100000
- * Read and check result on ofs 0x0
- * Restore contents
- */
- save0 = map_read(&priv->map, 0);
- save1 = map_read(&priv->map, 0x10000);
- tmp.x[0] = ~save0.x[0];
- map_write(&priv->map, tmp, 0x10000);
- tmp = map_read(&priv->map, 0);
- /* if we find this pattern on 0x0, we have 32K size */
- if (!map_word_equal(&priv->map, tmp, save0)) {
- map_write(&priv->map, save0, 0x0);
- priv->map.size = SZ_32K;
- } else
- map_write(&priv->map, save1, 0x10000);
-
- priv->mtd = do_map_probe("map_ram", &priv->map);
- if (!priv->mtd) {
- dev_err(&pdev->dev, "probing failed\n");
- return -ENXIO;
- }
-
- priv->mtd->owner = THIS_MODULE;
- priv->mtd->erasesize = 16;
- priv->mtd->dev.parent = &pdev->dev;
- if (!mtd_device_register(priv->mtd, NULL, 0)) {
- dev_info(&pdev->dev,
- "NV-RAM device size %ldKiB registered on AUTCPU12\n",
- priv->map.size / SZ_1K);
- return 0;
- }
-
- map_destroy(priv->mtd);
- dev_err(&pdev->dev, "NV-RAM device addition failed\n");
- return -ENOMEM;
-}
-
-static int autcpu12_nvram_remove(struct platform_device *pdev)
-{
- struct autcpu12_nvram_priv *priv = platform_get_drvdata(pdev);
-
- mtd_device_unregister(priv->mtd);
- map_destroy(priv->mtd);
-
- return 0;
-}
-
-static struct platform_driver autcpu12_nvram_driver = {
- .driver = {
- .name = "autcpu12_nvram",
- .owner = THIS_MODULE,
- },
- .probe = autcpu12_nvram_probe,
- .remove = autcpu12_nvram_remove,
-};
-module_platform_driver(autcpu12_nvram_driver);
-
-MODULE_AUTHOR("Thomas Gleixner");
-MODULE_DESCRIPTION("autcpu12 NVRAM map driver");
-MODULE_LICENSE("GPL");
--
1.8.1.5
More information about the linux-arm-kernel
mailing list