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path: root/drivers/mtd/maps/sa1100-flash.c
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Diffstat (limited to 'drivers/mtd/maps/sa1100-flash.c')
-rw-r--r--drivers/mtd/maps/sa1100-flash.c240
1 files changed, 32 insertions, 208 deletions
diff --git a/drivers/mtd/maps/sa1100-flash.c b/drivers/mtd/maps/sa1100-flash.c
index f904e6bd02e..8fc06bf111c 100644
--- a/drivers/mtd/maps/sa1100-flash.c
+++ b/drivers/mtd/maps/sa1100-flash.c
@@ -1,9 +1,7 @@
/*
* Flash memory access on SA11x0 based devices
*
- * (C) 2000 Nicolas Pitre <nico@cam.org>
- *
- * $Id: sa1100-flash.c,v 1.51 2005/11/07 11:14:28 gleixner Exp $
+ * (C) 2000 Nicolas Pitre <nico@fluxnic.net>
*/
#include <linux/module.h>
#include <linux/types.h>
@@ -14,117 +12,17 @@
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/err.h>
+#include <linux/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/concat.h>
-#include <asm/hardware.h>
-#include <asm/io.h>
+#include <mach/hardware.h>
#include <asm/sizes.h>
#include <asm/mach/flash.h>
-#if 0
-/*
- * This is here for documentation purposes only - until these people
- * submit their machine types. It will be gone January 2005.
- */
-static struct mtd_partition consus_partitions[] = {
- {
- .name = "Consus boot firmware",
- .offset = 0,
- .size = 0x00040000,
- .mask_flags = MTD_WRITABLE, /* force read-only */
- }, {
- .name = "Consus kernel",
- .offset = 0x00040000,
- .size = 0x00100000,
- .mask_flags = 0,
- }, {
- .name = "Consus disk",
- .offset = 0x00140000,
- /* The rest (up to 16M) for jffs. We could put 0 and
- make it find the size automatically, but right now
- i have 32 megs. jffs will use all 32 megs if given
- the chance, and this leads to horrible problems
- when you try to re-flash the image because blob
- won't erase the whole partition. */
- .size = 0x01000000 - 0x00140000,
- .mask_flags = 0,
- }, {
- /* this disk is a secondary disk, which can be used as
- needed, for simplicity, make it the size of the other
- consus partition, although realistically it could be
- the remainder of the disk (depending on the file
- system used) */
- .name = "Consus disk2",
- .offset = 0x01000000,
- .size = 0x01000000 - 0x00140000,
- .mask_flags = 0,
- }
-};
-
-/* Frodo has 2 x 16M 28F128J3A flash chips in bank 0: */
-static struct mtd_partition frodo_partitions[] =
-{
- {
- .name = "bootloader",
- .size = 0x00040000,
- .offset = 0x00000000,
- .mask_flags = MTD_WRITEABLE
- }, {
- .name = "bootloader params",
- .size = 0x00040000,
- .offset = MTDPART_OFS_APPEND,
- .mask_flags = MTD_WRITEABLE
- }, {
- .name = "kernel",
- .size = 0x00100000,
- .offset = MTDPART_OFS_APPEND,
- .mask_flags = MTD_WRITEABLE
- }, {
- .name = "ramdisk",
- .size = 0x00400000,
- .offset = MTDPART_OFS_APPEND,
- .mask_flags = MTD_WRITEABLE
- }, {
- .name = "file system",
- .size = MTDPART_SIZ_FULL,
- .offset = MTDPART_OFS_APPEND
- }
-};
-
-static struct mtd_partition jornada56x_partitions[] = {
- {
- .name = "bootldr",
- .size = 0x00040000,
- .offset = 0,
- .mask_flags = MTD_WRITEABLE,
- }, {
- .name = "rootfs",
- .size = MTDPART_SIZ_FULL,
- .offset = MTDPART_OFS_APPEND,
- }
-};
-
-static void jornada56x_set_vpp(int vpp)
-{
- if (vpp)
- GPSR = GPIO_GPIO26;
- else
- GPCR = GPIO_GPIO26;
- GPDR |= GPIO_GPIO26;
-}
-
-/*
- * Machine Phys Size set_vpp
- * Consus : SA1100_CS0_PHYS SZ_32M
- * Frodo : SA1100_CS0_PHYS SZ_32M
- * Jornada56x: SA1100_CS0_PHYS SZ_32M jornada56x_set_vpp
- */
-#endif
-
struct sa_subdev_info {
char name[16];
struct map_info map;
@@ -133,17 +31,27 @@ struct sa_subdev_info {
};
struct sa_info {
- struct mtd_partition *parts;
struct mtd_info *mtd;
int num_subdev;
- unsigned int nr_parts;
struct sa_subdev_info subdev[0];
};
+static DEFINE_SPINLOCK(sa1100_vpp_lock);
+static int sa1100_vpp_refcnt;
static void sa1100_set_vpp(struct map_info *map, int on)
{
struct sa_subdev_info *subdev = container_of(map, struct sa_subdev_info, map);
- subdev->plat->set_vpp(on);
+ unsigned long flags;
+
+ spin_lock_irqsave(&sa1100_vpp_lock, flags);
+ if (on) {
+ if (++sa1100_vpp_refcnt == 1) /* first nested 'on' */
+ subdev->plat->set_vpp(1);
+ } else {
+ if (--sa1100_vpp_refcnt == 0) /* last nested 'off' */
+ subdev->plat->set_vpp(0);
+ }
+ spin_unlock_irqrestore(&sa1100_vpp_lock, flags);
}
static void sa1100_destroy_subdev(struct sa_subdev_info *subdev)
@@ -211,8 +119,8 @@ static int sa1100_probe_subdev(struct sa_subdev_info *subdev, struct resource *r
}
subdev->mtd->owner = THIS_MODULE;
- printk(KERN_INFO "SA1100 flash: CFI device at 0x%08lx, %dMiB, "
- "%d-bit\n", phys, subdev->mtd->size >> 20,
+ printk(KERN_INFO "SA1100 flash: CFI device at 0x%08lx, %uMiB, %d-bit\n",
+ phys, (unsigned)(subdev->mtd->size >> 20),
subdev->map.bankwidth * 8);
return 0;
@@ -228,20 +136,11 @@ static void sa1100_destroy(struct sa_info *info, struct flash_platform_data *pla
int i;
if (info->mtd) {
- if (info->nr_parts == 0)
- del_mtd_device(info->mtd);
-#ifdef CONFIG_MTD_PARTITIONS
- else
- del_mtd_partitions(info->mtd);
-#endif
-#ifdef CONFIG_MTD_CONCAT
+ mtd_device_unregister(info->mtd);
if (info->mtd != info->subdev[0].mtd)
mtd_concat_destroy(info->mtd);
-#endif
}
- kfree(info->parts);
-
for (i = info->num_subdev - 1; i >= 0; i--)
sa1100_destroy_subdev(&info->subdev[i]);
kfree(info);
@@ -250,8 +149,8 @@ static void sa1100_destroy(struct sa_info *info, struct flash_platform_data *pla
plat->exit();
}
-static struct sa_info *__init
-sa1100_setup_mtd(struct platform_device *pdev, struct flash_platform_data *plat)
+static struct sa_info *sa1100_setup_mtd(struct platform_device *pdev,
+ struct flash_platform_data *plat)
{
struct sa_info *info;
int nr, size, i, ret = 0;
@@ -323,7 +222,6 @@ sa1100_setup_mtd(struct platform_device *pdev, struct flash_platform_data *plat)
info->mtd = info->subdev[0].mtd;
ret = 0;
} else if (info->num_subdev > 1) {
-#ifdef CONFIG_MTD_CONCAT
struct mtd_info *cdev[nr];
/*
* We detected multiple devices. Concatenate them together.
@@ -335,11 +233,6 @@ sa1100_setup_mtd(struct platform_device *pdev, struct flash_platform_data *plat)
plat->name);
if (info->mtd == NULL)
ret = -ENXIO;
-#else
- printk(KERN_ERR "SA1100 flash: multiple devices "
- "found but MTD concat support disabled.\n");
- ret = -ENXIO;
-#endif
}
if (ret == 0)
@@ -351,15 +244,13 @@ sa1100_setup_mtd(struct platform_device *pdev, struct flash_platform_data *plat)
return ERR_PTR(ret);
}
-static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL };
+static const char * const part_probes[] = { "cmdlinepart", "RedBoot", NULL };
-static int __init sa1100_mtd_probe(struct platform_device *pdev)
+static int sa1100_mtd_probe(struct platform_device *pdev)
{
- struct flash_platform_data *plat = pdev->dev.platform_data;
- struct mtd_partition *parts;
- const char *part_type = NULL;
+ struct flash_platform_data *plat = dev_get_platdata(&pdev->dev);
struct sa_info *info;
- int err, nr_parts = 0;
+ int err;
if (!plat)
return -ENODEV;
@@ -373,30 +264,8 @@ static int __init sa1100_mtd_probe(struct platform_device *pdev)
/*
* Partition selection stuff.
*/
-#ifdef CONFIG_MTD_PARTITIONS
- nr_parts = parse_mtd_partitions(info->mtd, part_probes, &parts, 0);
- if (nr_parts > 0) {
- info->parts = parts;
- part_type = "dynamic";
- } else
-#endif
- {
- parts = plat->parts;
- nr_parts = plat->nr_parts;
- part_type = "static";
- }
-
- if (nr_parts == 0) {
- printk(KERN_NOTICE "SA1100 flash: no partition info "
- "available, registering whole flash\n");
- add_mtd_device(info->mtd);
- } else {
- printk(KERN_NOTICE "SA1100 flash: using %s partition "
- "definition\n", part_type);
- add_mtd_partitions(info->mtd, parts, nr_parts);
- }
-
- info->nr_parts = nr_parts;
+ mtd_device_parse_register(info->mtd, part_probes, NULL, plat->parts,
+ plat->nr_parts);
platform_set_drvdata(pdev, info);
err = 0;
@@ -408,70 +277,25 @@ static int __init sa1100_mtd_probe(struct platform_device *pdev)
static int __exit sa1100_mtd_remove(struct platform_device *pdev)
{
struct sa_info *info = platform_get_drvdata(pdev);
- struct flash_platform_data *plat = pdev->dev.platform_data;
+ struct flash_platform_data *plat = dev_get_platdata(&pdev->dev);
- platform_set_drvdata(pdev, NULL);
sa1100_destroy(info, plat);
return 0;
}
-#ifdef CONFIG_PM
-static int sa1100_mtd_suspend(struct platform_device *dev, pm_message_t state)
-{
- struct sa_info *info = platform_get_drvdata(dev);
- int ret = 0;
-
- if (info)
- ret = info->mtd->suspend(info->mtd);
-
- return ret;
-}
-
-static int sa1100_mtd_resume(struct platform_device *dev)
-{
- struct sa_info *info = platform_get_drvdata(dev);
- if (info)
- info->mtd->resume(info->mtd);
- return 0;
-}
-
-static void sa1100_mtd_shutdown(struct platform_device *dev)
-{
- struct sa_info *info = platform_get_drvdata(dev);
- if (info && info->mtd->suspend(info->mtd) == 0)
- info->mtd->resume(info->mtd);
-}
-#else
-#define sa1100_mtd_suspend NULL
-#define sa1100_mtd_resume NULL
-#define sa1100_mtd_shutdown NULL
-#endif
-
static struct platform_driver sa1100_mtd_driver = {
.probe = sa1100_mtd_probe,
.remove = __exit_p(sa1100_mtd_remove),
- .suspend = sa1100_mtd_suspend,
- .resume = sa1100_mtd_resume,
- .shutdown = sa1100_mtd_shutdown,
.driver = {
- .name = "flash",
+ .name = "sa1100-mtd",
+ .owner = THIS_MODULE,
},
};
-static int __init sa1100_mtd_init(void)
-{
- return platform_driver_register(&sa1100_mtd_driver);
-}
-
-static void __exit sa1100_mtd_exit(void)
-{
- platform_driver_unregister(&sa1100_mtd_driver);
-}
-
-module_init(sa1100_mtd_init);
-module_exit(sa1100_mtd_exit);
+module_platform_driver(sa1100_mtd_driver);
MODULE_AUTHOR("Nicolas Pitre");
MODULE_DESCRIPTION("SA1100 CFI map driver");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:sa1100-mtd");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 23:59:39 +0000