diff options
Diffstat (limited to 'drivers/mtd/maps/cdb89712.c')
| -rw-r--r-- | drivers/mtd/maps/cdb89712.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/drivers/mtd/maps/cdb89712.c b/drivers/mtd/maps/cdb89712.c new file mode 100644 index 0000000..ab15dac --- /dev/null +++ b/drivers/mtd/maps/cdb89712.c @@ -0,0 +1,268 @@ +/* + * Flash on Cirrus CDB89712 + * + * $Id: cdb89712.c,v 1.10 2004/11/04 13:24:14 gleixner Exp $ + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <asm/io.h> +#include <asm/arch/hardware.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> + + + + +static struct mtd_info *flash_mtd; + +struct map_info cdb89712_flash_map = { + .name = "flash", + .size = FLASH_SIZE, + .bankwidth = FLASH_WIDTH, + .phys = FLASH_START, +}; + +struct resource cdb89712_flash_resource = { + .name = "Flash", + .start = FLASH_START, + .end = FLASH_START + FLASH_SIZE - 1, + .flags = IORESOURCE_IO | IORESOURCE_BUSY, +}; + +static int __init init_cdb89712_flash (void) +{ + int err; + + if (request_resource (&ioport_resource, &cdb89712_flash_resource)) { + printk(KERN_NOTICE "Failed to reserve Cdb89712 FLASH space\n"); + err = -EBUSY; + goto out; + } + + cdb89712_flash_map.virt = ioremap(FLASH_START, FLASH_SIZE); + if (!cdb89712_flash_map.virt) { + printk(KERN_NOTICE "Failed to ioremap Cdb89712 FLASH space\n"); + err = -EIO; + goto out_resource; + } + simple_map_init(&cdb89712_flash_map); + flash_mtd = do_map_probe("cfi_probe", &cdb89712_flash_map); + if (!flash_mtd) { + flash_mtd = do_map_probe("map_rom", &cdb89712_flash_map); + if (flash_mtd) + flash_mtd->erasesize = 0x10000; + } + if (!flash_mtd) { + printk("FLASH probe failed\n"); + err = -ENXIO; + goto out_ioremap; + } + + flash_mtd->owner = THIS_MODULE; + + if (add_mtd_device(flash_mtd)) { + printk("FLASH device addition failed\n"); + err = -ENOMEM; + goto out_probe; + } + + return 0; + +out_probe: + map_destroy(flash_mtd); + flash_mtd = 0; +out_ioremap: + iounmap((void *)cdb89712_flash_map.virt); +out_resource: + release_resource (&cdb89712_flash_resource); +out: + return err; +} + + + + + +static struct mtd_info *sram_mtd; + +struct map_info cdb89712_sram_map = { + .name = "SRAM", + .size = SRAM_SIZE, + .bankwidth = SRAM_WIDTH, + .phys = SRAM_START, +}; + +struct resource cdb89712_sram_resource = { + .name = "SRAM", + .start = SRAM_START, + .end = SRAM_START + SRAM_SIZE - 1, + .flags = IORESOURCE_IO | IORESOURCE_BUSY, +}; + +static int __init init_cdb89712_sram (void) +{ + int err; + + if (request_resource (&ioport_resource, &cdb89712_sram_resource)) { + printk(KERN_NOTICE "Failed to reserve Cdb89712 SRAM space\n"); + err = -EBUSY; + goto out; + } + + cdb89712_sram_map.virt = ioremap(SRAM_START, SRAM_SIZE); + if (!cdb89712_sram_map.virt) { + printk(KERN_NOTICE "Failed to ioremap Cdb89712 SRAM space\n"); + err = -EIO; + goto out_resource; + } + simple_map_init(&cdb89712_sram_map); + sram_mtd = do_map_probe("map_ram", &cdb89712_sram_map); + if (!sram_mtd) { + printk("SRAM probe failed\n"); + err = -ENXIO; + goto out_ioremap; + } + + sram_mtd->owner = THIS_MODULE; + sram_mtd->erasesize = 16; + + if (add_mtd_device(sram_mtd)) { + printk("SRAM device addition failed\n"); + err = -ENOMEM; + goto out_probe; + } + + return 0; + +out_probe: + map_destroy(sram_mtd); + sram_mtd = 0; +out_ioremap: + iounmap((void *)cdb89712_sram_map.virt); +out_resource: + release_resource (&cdb89712_sram_resource); +out: + return err; +} + + + + + + + +static struct mtd_info *bootrom_mtd; + +struct map_info cdb89712_bootrom_map = { + .name = "BootROM", + .size = BOOTROM_SIZE, + .bankwidth = BOOTROM_WIDTH, + .phys = BOOTROM_START, +}; + +struct resource cdb89712_bootrom_resource = { + .name = "BootROM", + .start = BOOTROM_START, + .end = BOOTROM_START + BOOTROM_SIZE - 1, + .flags = IORESOURCE_IO | IORESOURCE_BUSY, +}; + +static int __init init_cdb89712_bootrom (void) +{ + int err; + + if (request_resource (&ioport_resource, &cdb89712_bootrom_resource)) { + printk(KERN_NOTICE "Failed to reserve Cdb89712 BOOTROM space\n"); + err = -EBUSY; + goto out; + } + + cdb89712_bootrom_map.virt = ioremap(BOOTROM_START, BOOTROM_SIZE); + if (!cdb89712_bootrom_map.virt) { + printk(KERN_NOTICE "Failed to ioremap Cdb89712 BootROM space\n"); + err = -EIO; + goto out_resource; + } + simple_map_init(&cdb89712_bootrom_map); + bootrom_mtd = do_map_probe("map_rom", &cdb89712_bootrom_map); + if (!bootrom_mtd) { + printk("BootROM probe failed\n"); + err = -ENXIO; + goto out_ioremap; + } + + bootrom_mtd->owner = THIS_MODULE; + bootrom_mtd->erasesize = 0x10000; + + if (add_mtd_device(bootrom_mtd)) { + printk("BootROM device addition failed\n"); + err = -ENOMEM; + goto out_probe; + } + + return 0; + +out_probe: + map_destroy(bootrom_mtd); + bootrom_mtd = 0; +out_ioremap: + iounmap((void *)cdb89712_bootrom_map.virt); +out_resource: + release_resource (&cdb89712_bootrom_resource); +out: + return err; +} + + + + + +static int __init init_cdb89712_maps(void) +{ + + printk(KERN_INFO "Cirrus CDB89712 MTD mappings:\n Flash 0x%x at 0x%x\n SRAM 0x%x at 0x%x\n BootROM 0x%x at 0x%x\n", + FLASH_SIZE, FLASH_START, SRAM_SIZE, SRAM_START, BOOTROM_SIZE, BOOTROM_START); + + init_cdb89712_flash(); + init_cdb89712_sram(); + init_cdb89712_bootrom(); + + return 0; +} + + +static void __exit cleanup_cdb89712_maps(void) +{ + if (sram_mtd) { + del_mtd_device(sram_mtd); + map_destroy(sram_mtd); + iounmap((void *)cdb89712_sram_map.virt); + release_resource (&cdb89712_sram_resource); + } + + if (flash_mtd) { + del_mtd_device(flash_mtd); + map_destroy(flash_mtd); + iounmap((void *)cdb89712_flash_map.virt); + release_resource (&cdb89712_flash_resource); + } + + if (bootrom_mtd) { + del_mtd_device(bootrom_mtd); + map_destroy(bootrom_mtd); + iounmap((void *)cdb89712_bootrom_map.virt); + release_resource (&cdb89712_bootrom_resource); + } +} + +module_init(init_cdb89712_maps); +module_exit(cleanup_cdb89712_maps); + +MODULE_AUTHOR("Ray L"); +MODULE_DESCRIPTION("ARM CDB89712 map driver"); +MODULE_LICENSE("GPL"); |
