cdb89712.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:7k
- /*
- * Flash on Cirrus CDB89712
- *
- * $Id: cdb89712.c,v 1.3 2001/10/02 15:14:43 rmk Exp $
- */
- #include <linux/module.h>
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/ioport.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>
- __u8 cdb89712_read8(struct map_info *map, unsigned long ofs)
- {
- return __raw_readb(map->map_priv_1 + ofs);
- }
- __u16 cdb89712_read16(struct map_info *map, unsigned long ofs)
- {
- return __raw_readw(map->map_priv_1 + ofs);
- }
- __u32 cdb89712_read32(struct map_info *map, unsigned long ofs)
- {
- return __raw_readl(map->map_priv_1 + ofs);
- }
- void cdb89712_write8(struct map_info *map, __u8 d, unsigned long adr)
- {
- __raw_writeb(d, map->map_priv_1 + adr);
- mb();
- }
- void cdb89712_write16(struct map_info *map, __u16 d, unsigned long adr)
- {
- __raw_writew(d, map->map_priv_1 + adr);
- mb();
- }
- void cdb89712_write32(struct map_info *map, __u32 d, unsigned long adr)
- {
- __raw_writel(d, map->map_priv_1 + adr);
- mb();
- }
- void cdb89712_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
- {
- // printk ("cdb89712_copy_from: 0x%x@0x%x -> 0x%xn", len, from, to);
- memcpy_fromio(to, map->map_priv_1 + from, len);
- }
- void cdb89712_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
- {
- while(len) {
- __raw_writeb(*(unsigned char *) from, map->map_priv_1 + to);
- from++;
- to++;
- len--;
- }
- }
- static struct mtd_info *flash_mtd;
- struct map_info cdb89712_flash_map = {
- name: "flash",
- size: FLASH_SIZE,
- buswidth: FLASH_WIDTH,
- read8: cdb89712_read8,
- read16: cdb89712_read16,
- read32: cdb89712_read32,
- copy_from: cdb89712_copy_from,
- write8: cdb89712_write8,
- write16: cdb89712_write16,
- write32: cdb89712_write32,
- copy_to: cdb89712_copy_to
- };
- 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 spacen");
- err = -EBUSY;
- goto out;
- }
-
- cdb89712_flash_map.map_priv_1 = (unsigned long)ioremap(FLASH_START, FLASH_SIZE);
- if (!cdb89712_flash_map.map_priv_1) {
- printk(KERN_NOTICE "Failed to ioremap Cdb89712 FLASH spacen");
- err = -EIO;
- goto out_resource;
- }
- 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 failedn");
- err = -ENXIO;
- goto out_ioremap;
- }
- flash_mtd->module = THIS_MODULE;
-
- if (add_mtd_device(flash_mtd)) {
- printk("FLASH device addition failedn");
- err = -ENOMEM;
- goto out_probe;
- }
-
- return 0;
- out_probe:
- map_destroy(flash_mtd);
- flash_mtd = 0;
- out_ioremap:
- iounmap((void *)cdb89712_flash_map.map_priv_1);
- 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,
- buswidth: SRAM_WIDTH,
- read8: cdb89712_read8,
- read16: cdb89712_read16,
- read32: cdb89712_read32,
- copy_from: cdb89712_copy_from,
- write8: cdb89712_write8,
- write16: cdb89712_write16,
- write32: cdb89712_write32,
- copy_to: cdb89712_copy_to
- };
- 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 spacen");
- err = -EBUSY;
- goto out;
- }
-
- cdb89712_sram_map.map_priv_1 = (unsigned long)ioremap(SRAM_START, SRAM_SIZE);
- if (!cdb89712_sram_map.map_priv_1) {
- printk(KERN_NOTICE "Failed to ioremap Cdb89712 SRAM spacen");
- err = -EIO;
- goto out_resource;
- }
- sram_mtd = do_map_probe("map_ram", &cdb89712_sram_map);
- if (!sram_mtd) {
- printk("SRAM probe failedn");
- err = -ENXIO;
- goto out_ioremap;
- }
- sram_mtd->module = THIS_MODULE;
- sram_mtd->erasesize = 16;
-
- if (add_mtd_device(sram_mtd)) {
- printk("SRAM device addition failedn");
- err = -ENOMEM;
- goto out_probe;
- }
-
- return 0;
- out_probe:
- map_destroy(sram_mtd);
- sram_mtd = 0;
- out_ioremap:
- iounmap((void *)cdb89712_sram_map.map_priv_1);
- 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,
- buswidth: BOOTROM_WIDTH,
- read8: cdb89712_read8,
- read16: cdb89712_read16,
- read32: cdb89712_read32,
- copy_from: cdb89712_copy_from,
- };
- 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 spacen");
- err = -EBUSY;
- goto out;
- }
-
- cdb89712_bootrom_map.map_priv_1 = (unsigned long)ioremap(BOOTROM_START, BOOTROM_SIZE);
- if (!cdb89712_bootrom_map.map_priv_1) {
- printk(KERN_NOTICE "Failed to ioremap Cdb89712 BootROM spacen");
- err = -EIO;
- goto out_resource;
- }
- bootrom_mtd = do_map_probe("map_rom", &cdb89712_bootrom_map);
- if (!bootrom_mtd) {
- printk("BootROM probe failedn");
- err = -ENXIO;
- goto out_ioremap;
- }
- bootrom_mtd->module = THIS_MODULE;
- bootrom_mtd->erasesize = 0x10000;
-
- if (add_mtd_device(bootrom_mtd)) {
- printk("BootROM device addition failedn");
- err = -ENOMEM;
- goto out_probe;
- }
-
- return 0;
- out_probe:
- map_destroy(bootrom_mtd);
- bootrom_mtd = 0;
- out_ioremap:
- iounmap((void *)cdb89712_bootrom_map.map_priv_1);
- 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%xn SRAM 0x%x at 0x%xn BootROM 0x%x at 0x%xn",
- 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.map_priv_1);
- release_resource (&cdb89712_sram_resource);
- }
-
- if (flash_mtd) {
- del_mtd_device(flash_mtd);
- map_destroy(flash_mtd);
- iounmap((void *)cdb89712_flash_map.map_priv_1);
- release_resource (&cdb89712_flash_resource);
- }
- if (bootrom_mtd) {
- del_mtd_device(bootrom_mtd);
- map_destroy(bootrom_mtd);
- iounmap((void *)cdb89712_bootrom_map.map_priv_1);
- 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");