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Message-ID: <20060914163259.068abe6d@cad-250-152.norway.atmel.com>
Date: Thu, 14 Sep 2006 16:32:59 +0200
From: Haavard Skinnemoen <hskinnemoen@...el.com>
To: Andrew Morton <akpm@...l.org>
Cc: linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [-mm patch 3/4] AVR32 MTD: Mapping driver for the ATSTK1000 board
Add mapping driver for the AT49BV6416 NOR flash chip on the ATSTK1000
development board.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@...el.com>
---
drivers/mtd/maps/Kconfig | 10 ++
drivers/mtd/maps/Makefile | 1
drivers/mtd/maps/atstk1000.c | 179 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 190 insertions(+)
Index: linux-2.6.18-rc5-mm1/drivers/mtd/maps/Kconfig
===================================================================
--- linux-2.6.18-rc5-mm1.orig/drivers/mtd/maps/Kconfig 2006-09-07 15:56:47.000000000 +0200
+++ linux-2.6.18-rc5-mm1/drivers/mtd/maps/Kconfig 2006-09-07 16:18:47.000000000 +0200
@@ -630,5 +630,15 @@ config MTD_PLATRAM
This selection automatically selects the map_ram driver.
+config MTD_ATSTK1000
+ tristate "Map driver for NOR flash on Atmel ATSTK1000"
+ depends on MTD && AVR32 && BOARD_ATSTK1000
+ select MTD_CFI
+ select MTD_CFI_AMDSTD
+ select MTD_PARTITIONS
+ help
+ Map driver for NOR flash on the Atmel ATSTK1000 development
+ board.
+
endmenu
Index: linux-2.6.18-rc5-mm1/drivers/mtd/maps/Makefile
===================================================================
--- linux-2.6.18-rc5-mm1.orig/drivers/mtd/maps/Makefile 2006-09-07 15:56:47.000000000 +0200
+++ linux-2.6.18-rc5-mm1/drivers/mtd/maps/Makefile 2006-09-07 16:16:03.000000000 +0200
@@ -71,3 +71,4 @@ obj-$(CONFIG_MTD_PLATRAM) += plat-ram.o
obj-$(CONFIG_MTD_OMAP_NOR) += omap_nor.o
obj-$(CONFIG_MTD_MTX1) += mtx-1_flash.o
obj-$(CONFIG_MTD_TQM834x) += tqm834x.o
+obj-$(CONFIG_MTD_ATSTK1000) += atstk1000.o
Index: linux-2.6.18-rc5-mm1/drivers/mtd/maps/atstk1000.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.18-rc5-mm1/drivers/mtd/maps/atstk1000.c 2006-09-07 16:16:03.000000000 +0200
@@ -0,0 +1,179 @@
+/*
+ * Flash memory support for the ATSTK1000 development board
+ *
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * 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.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/io.h>
+#include <asm/arch/board.h>
+#include <asm/arch/smc.h>
+
+static struct smc_config flash_config = {
+ .ncs_read_setup = 0,
+ .nrd_setup = 40,
+ .ncs_write_setup = 0,
+ .nwe_setup = 10,
+
+ .ncs_read_pulse = 80,
+ .nrd_pulse = 40,
+ .ncs_write_pulse = 65,
+ .nwe_pulse = 55,
+
+ .read_cycle = 120,
+ .write_cycle = 120,
+
+ .bus_width = 2,
+ .nrd_controlled = 1,
+ .nwe_controlled = 1,
+ .byte_write = 1,
+};
+
+struct atstk1000_flash {
+ struct mtd_info *mtd;
+ struct map_info map;
+ unsigned int nr_parts;
+ struct mtd_partition *parts;
+};
+
+static const char *part_probes[] = { "cmdlinepart", NULL };
+
+static int __devinit atstk1000_flash_probe(struct platform_device *pdev)
+{
+ struct flash_platform_data *plat = pdev->dev.platform_data;
+ struct atstk1000_flash *flash;
+ struct resource *mem;
+ struct mtd_partition *parts;
+ unsigned long size;
+ int nr_parts;
+ int ret;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem)
+ return -ENXIO;
+
+ flash = kzalloc(sizeof(struct atstk1000_flash), GFP_KERNEL);
+ if (!flash)
+ return -ENOMEM;
+
+ size = mem->end - mem->start + 1;
+
+ ret = smc_set_configuration(0, &flash_config);
+ if (ret < 0)
+ goto out_free_flash;
+
+ ret = -ENOMEM;
+ flash->map.virt = ioremap(mem->start, size);
+ if (!flash->map.virt)
+ goto out_free_flash;
+ flash->map.name = pdev->dev.bus_id;
+ flash->map.phys = mem->start;
+ flash->map.size = size;
+ flash->map.bankwidth = 2;
+
+ simple_map_init(&flash->map);
+
+ ret = -ENXIO;
+ flash->mtd = do_map_probe("cfi_probe", &flash->map);
+ if (!flash->mtd)
+ goto out_unmap_mem;
+ flash->mtd->owner = THIS_MODULE;
+
+ if (flash->mtd->unlock) {
+ printk("ATSTK1000 flash: unlocking area 0x%08lx-0x%08lx\n",
+ (unsigned long)mem->start, (unsigned long)mem->end);
+ ret = flash->mtd->unlock(flash->mtd, mem->start, size);
+ if (ret < 0)
+ goto out_destroy_map;
+ }
+
+ nr_parts = parse_mtd_partitions(flash->mtd, part_probes, &parts, 0);
+ if (nr_parts > 0) {
+ flash->parts = parts;
+ } else if (plat) {
+ parts = plat->parts;
+ nr_parts = plat->nr_parts;
+ }
+ if (nr_parts <= 0) {
+ printk(KERN_NOTICE "ATSTK1000 flash: no partition info "
+ "available, registering whole flash\n");
+ add_mtd_device(flash->mtd);
+ } else {
+ ret = add_mtd_partitions(flash->mtd, parts, nr_parts);
+ if (ret < 0)
+ goto out_free_parts;
+ }
+
+ flash->nr_parts = nr_parts;
+
+ platform_set_drvdata(pdev, flash);
+ return 0;
+
+out_free_parts:
+ kfree(flash->parts);
+out_destroy_map:
+ map_destroy(flash->mtd);
+out_unmap_mem:
+ iounmap(flash->map.virt);
+out_free_flash:
+ kfree(flash);
+ return ret;
+}
+
+static int __devexit atstk1000_flash_remove(struct platform_device *pdev)
+{
+ struct atstk1000_flash *flash = platform_get_drvdata(pdev);
+
+ if (flash->mtd) {
+ if (flash->nr_parts > 0)
+ del_mtd_partitions(flash->mtd);
+ else
+ del_mtd_device(flash->mtd);
+
+ kfree(flash->parts);
+
+ map_destroy(flash->mtd);
+ iounmap(flash->map.virt);
+ kfree(flash);
+ }
+
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static struct platform_driver atstk1000_flash_driver = {
+ .probe = atstk1000_flash_probe,
+ .remove = __devexit_p(atstk1000_flash_remove),
+ .driver = {
+ .name = "atstk1000-flash",
+ },
+};
+
+static int __init atstk1000_flash_init(void)
+{
+ return platform_driver_register(&atstk1000_flash_driver);
+}
+
+static void __exit atstk1000_flash_exit(void)
+{
+ platform_driver_unregister(&atstk1000_flash_driver);
+}
+
+module_init(atstk1000_flash_init);
+module_exit(atstk1000_flash_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MTD NOR map driver for the ATSTK1000 board");
+MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@...el.com>");
-
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