diff options
Diffstat (limited to 'drivers/mtd/maps/integrator-flash.c')
| -rw-r--r-- | drivers/mtd/maps/integrator-flash.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/drivers/mtd/maps/integrator-flash.c b/drivers/mtd/maps/integrator-flash.c new file mode 100644 index 00000000000..e39a98a0171 --- /dev/null +++ b/drivers/mtd/maps/integrator-flash.c @@ -0,0 +1,217 @@ +/*====================================================================== + + drivers/mtd/maps/integrator-flash.c: ARM Integrator flash map driver + + Copyright (C) 2000 ARM Limited + Copyright (C) 2003 Deep Blue Solutions Ltd. + + 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 + + This is access code for flashes using ARM's flash partitioning + standards. + + $Id: integrator-flash.c,v 1.18 2004/11/01 13:26:15 rmk Exp $ + +======================================================================*/ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/ioport.h> +#include <linux/device.h> +#include <linux/init.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> + +#include <asm/mach/flash.h> +#include <asm/hardware.h> +#include <asm/io.h> +#include <asm/system.h> + +#ifdef CONFIG_ARCH_P720T +#define FLASH_BASE (0x04000000) +#define FLASH_SIZE (64*1024*1024) +#endif + +struct armflash_info { + struct flash_platform_data *plat; + struct resource *res; + struct mtd_partition *parts; + struct mtd_info *mtd; + struct map_info map; +}; + +static void armflash_set_vpp(struct map_info *map, int on) +{ + struct armflash_info *info = container_of(map, struct armflash_info, map); + + if (info->plat && info->plat->set_vpp) + info->plat->set_vpp(on); +} + +static const char *probes[] = { "cmdlinepart", "RedBoot", "afs", NULL }; + +static int armflash_probe(struct device *_dev) +{ + struct platform_device *dev = to_platform_device(_dev); + struct flash_platform_data *plat = dev->dev.platform_data; + struct resource *res = dev->resource; + unsigned int size = res->end - res->start + 1; + struct armflash_info *info; + int err; + void __iomem *base; + + info = kmalloc(sizeof(struct armflash_info), GFP_KERNEL); + if (!info) { + err = -ENOMEM; + goto out; + } + + memset(info, 0, sizeof(struct armflash_info)); + + info->plat = plat; + if (plat && plat->init) { + err = plat->init(); + if (err) + goto no_resource; + } + + info->res = request_mem_region(res->start, size, "armflash"); + if (!info->res) { + err = -EBUSY; + goto no_resource; + } + + base = ioremap(res->start, size); + if (!base) { + err = -ENOMEM; + goto no_mem; + } + + /* + * look for CFI based flash parts fitted to this board + */ + info->map.size = size; + info->map.bankwidth = plat->width; + info->map.phys = res->start; + info->map.virt = base; + info->map.name = dev->dev.bus_id; + info->map.set_vpp = armflash_set_vpp; + + simple_map_init(&info->map); + + /* + * Also, the CFI layer automatically works out what size + * of chips we have, and does the necessary identification + * for us automatically. + */ + info->mtd = do_map_probe(plat->map_name, &info->map); + if (!info->mtd) { + err = -ENXIO; + goto no_device; + } + + info->mtd->owner = THIS_MODULE; + + err = parse_mtd_partitions(info->mtd, probes, &info->parts, 0); + if (err > 0) { + err = add_mtd_partitions(info->mtd, info->parts, err); + if (err) + printk(KERN_ERR + "mtd partition registration failed: %d\n", err); + } + + if (err == 0) + dev_set_drvdata(&dev->dev, info); + + /* + * If we got an error, free all resources. + */ + if (err < 0) { + if (info->mtd) { + del_mtd_partitions(info->mtd); + map_destroy(info->mtd); + } + if (info->parts) + kfree(info->parts); + + no_device: + iounmap(base); + no_mem: + release_mem_region(res->start, size); + no_resource: + if (plat && plat->exit) + plat->exit(); + kfree(info); + } + out: + return err; +} + +static int armflash_remove(struct device *_dev) +{ + struct platform_device *dev = to_platform_device(_dev); + struct armflash_info *info = dev_get_drvdata(&dev->dev); + + dev_set_drvdata(&dev->dev, NULL); + + if (info) { + if (info->mtd) { + del_mtd_partitions(info->mtd); + map_destroy(info->mtd); + } + if (info->parts) + kfree(info->parts); + + iounmap(info->map.virt); + release_resource(info->res); + kfree(info->res); + + if (info->plat && info->plat->exit) + info->plat->exit(); + + kfree(info); + } + + return 0; +} + +static struct device_driver armflash_driver = { + .name = "armflash", + .bus = &platform_bus_type, + .probe = armflash_probe, + .remove = armflash_remove, +}; + +static int __init armflash_init(void) +{ + return driver_register(&armflash_driver); +} + +static void __exit armflash_exit(void) +{ + driver_unregister(&armflash_driver); +} + +module_init(armflash_init); +module_exit(armflash_exit); + +MODULE_AUTHOR("ARM Ltd"); +MODULE_DESCRIPTION("ARM Integrator CFI map driver"); +MODULE_LICENSE("GPL"); |