![Russell King](/assets/img/avatar_default.png)
This allows us to eliminate the casts in the drivers, and eventually remove the use of the device_driver function pointer methods for platform device drivers. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
481 lines
10 KiB
C
481 lines
10 KiB
C
/*
|
|
* 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 $
|
|
*/
|
|
#include <linux/config.h>
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/err.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 <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;
|
|
struct mtd_info *mtd;
|
|
struct flash_platform_data *plat;
|
|
};
|
|
|
|
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 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);
|
|
}
|
|
|
|
static void sa1100_destroy_subdev(struct sa_subdev_info *subdev)
|
|
{
|
|
if (subdev->mtd)
|
|
map_destroy(subdev->mtd);
|
|
if (subdev->map.virt)
|
|
iounmap(subdev->map.virt);
|
|
release_mem_region(subdev->map.phys, subdev->map.size);
|
|
}
|
|
|
|
static int sa1100_probe_subdev(struct sa_subdev_info *subdev, struct resource *res)
|
|
{
|
|
unsigned long phys;
|
|
unsigned int size;
|
|
int ret;
|
|
|
|
phys = res->start;
|
|
size = res->end - phys + 1;
|
|
|
|
/*
|
|
* Retrieve the bankwidth from the MSC registers.
|
|
* We currently only implement CS0 and CS1 here.
|
|
*/
|
|
switch (phys) {
|
|
default:
|
|
printk(KERN_WARNING "SA1100 flash: unknown base address "
|
|
"0x%08lx, assuming CS0\n", phys);
|
|
|
|
case SA1100_CS0_PHYS:
|
|
subdev->map.bankwidth = (MSC0 & MSC_RBW) ? 2 : 4;
|
|
break;
|
|
|
|
case SA1100_CS1_PHYS:
|
|
subdev->map.bankwidth = ((MSC0 >> 16) & MSC_RBW) ? 2 : 4;
|
|
break;
|
|
}
|
|
|
|
if (!request_mem_region(phys, size, subdev->name)) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
if (subdev->plat->set_vpp)
|
|
subdev->map.set_vpp = sa1100_set_vpp;
|
|
|
|
subdev->map.phys = phys;
|
|
subdev->map.size = size;
|
|
subdev->map.virt = ioremap(phys, size);
|
|
if (!subdev->map.virt) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
simple_map_init(&subdev->map);
|
|
|
|
/*
|
|
* Now let's probe for the actual flash. Do it here since
|
|
* specific machine settings might have been set above.
|
|
*/
|
|
subdev->mtd = do_map_probe(subdev->plat->map_name, &subdev->map);
|
|
if (subdev->mtd == NULL) {
|
|
ret = -ENXIO;
|
|
goto err;
|
|
}
|
|
subdev->mtd->owner = THIS_MODULE;
|
|
|
|
printk(KERN_INFO "SA1100 flash: CFI device at 0x%08lx, %dMiB, "
|
|
"%d-bit\n", phys, subdev->mtd->size >> 20,
|
|
subdev->map.bankwidth * 8);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
sa1100_destroy_subdev(subdev);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void sa1100_destroy(struct sa_info *info, struct flash_platform_data *plat)
|
|
{
|
|
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
|
|
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);
|
|
|
|
if (plat->exit)
|
|
plat->exit();
|
|
}
|
|
|
|
static struct sa_info *__init
|
|
sa1100_setup_mtd(struct platform_device *pdev, struct flash_platform_data *plat)
|
|
{
|
|
struct sa_info *info;
|
|
int nr, size, i, ret = 0;
|
|
|
|
/*
|
|
* Count number of devices.
|
|
*/
|
|
for (nr = 0; ; nr++)
|
|
if (!platform_get_resource(pdev, IORESOURCE_MEM, nr))
|
|
break;
|
|
|
|
if (nr == 0) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
size = sizeof(struct sa_info) + sizeof(struct sa_subdev_info) * nr;
|
|
|
|
/*
|
|
* Allocate the map_info structs in one go.
|
|
*/
|
|
info = kmalloc(size, GFP_KERNEL);
|
|
if (!info) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
memset(info, 0, size);
|
|
|
|
if (plat->init) {
|
|
ret = plat->init();
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Claim and then map the memory regions.
|
|
*/
|
|
for (i = 0; i < nr; i++) {
|
|
struct sa_subdev_info *subdev = &info->subdev[i];
|
|
struct resource *res;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, i);
|
|
if (!res)
|
|
break;
|
|
|
|
subdev->map.name = subdev->name;
|
|
sprintf(subdev->name, "%s-%d", plat->name, i);
|
|
subdev->plat = plat;
|
|
|
|
ret = sa1100_probe_subdev(subdev, res);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
info->num_subdev = i;
|
|
|
|
/*
|
|
* ENXIO is special. It means we didn't find a chip when we probed.
|
|
*/
|
|
if (ret != 0 && !(ret == -ENXIO && info->num_subdev > 0))
|
|
goto err;
|
|
|
|
/*
|
|
* If we found one device, don't bother with concat support. If
|
|
* we found multiple devices, use concat if we have it available,
|
|
* otherwise fail. Either way, it'll be called "sa1100".
|
|
*/
|
|
if (info->num_subdev == 1) {
|
|
strcpy(info->subdev[0].name, plat->name);
|
|
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.
|
|
*/
|
|
for (i = 0; i < info->num_subdev; i++)
|
|
cdev[i] = info->subdev[i].mtd;
|
|
|
|
info->mtd = mtd_concat_create(cdev, info->num_subdev,
|
|
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)
|
|
return info;
|
|
|
|
err:
|
|
sa1100_destroy(info, plat);
|
|
out:
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL };
|
|
|
|
static int __init 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 sa_info *info;
|
|
int err, nr_parts = 0;
|
|
|
|
if (!plat)
|
|
return -ENODEV;
|
|
|
|
info = sa1100_setup_mtd(pdev, plat);
|
|
if (IS_ERR(info)) {
|
|
err = PTR_ERR(info);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
err = 0;
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
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;
|
|
|
|
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",
|
|
},
|
|
};
|
|
|
|
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_AUTHOR("Nicolas Pitre");
|
|
MODULE_DESCRIPTION("SA1100 CFI map driver");
|
|
MODULE_LICENSE("GPL");
|