1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
178 lines
4.7 KiB
C
178 lines
4.7 KiB
C
/*
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* Flash memory access on Alchemy Pb1xxx boards
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*
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* (C) 2001 Pete Popov <ppopov@mvista.com>
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*
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* $Id: pb1xxx-flash.c,v 1.14 2004/11/04 13:24:15 gleixner Exp $
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/partitions.h>
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#include <asm/io.h>
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#ifdef DEBUG_RW
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#define DBG(x...) printk(x)
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#else
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#define DBG(x...)
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#endif
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#ifdef CONFIG_MIPS_PB1000
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#define WINDOW_ADDR 0x1F800000
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#define WINDOW_SIZE 0x800000
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static struct mtd_partition pb1xxx_partitions[] = {
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{
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.name = "yamon env",
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.size = 0x00020000,
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.offset = 0,
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.mask_flags = MTD_WRITEABLE},
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{
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.name = "User FS",
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.size = 0x003e0000,
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.offset = 0x20000,},
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{
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.name = "boot code",
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.size = 0x100000,
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.offset = 0x400000,
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.mask_flags = MTD_WRITEABLE},
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{
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.name = "raw/kernel",
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.size = 0x300000,
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.offset = 0x500000}
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};
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#elif defined(CONFIG_MIPS_PB1500) || defined(CONFIG_MIPS_PB1100)
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#if defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER)
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/* both 32MB banks will be used. Combine the first 32MB bank and the
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* first 28MB of the second bank together into a single jffs/jffs2
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* partition.
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*/
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#define WINDOW_ADDR 0x1C000000
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#define WINDOW_SIZE 0x4000000
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static struct mtd_partition pb1xxx_partitions[] = {
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{
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.name = "User FS",
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.size = 0x3c00000,
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.offset = 0x0000000
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},{
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.name = "yamon",
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.size = 0x0100000,
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.offset = 0x3c00000,
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.mask_flags = MTD_WRITEABLE
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},{
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.name = "raw kernel",
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.size = 0x02c0000,
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.offset = 0x3d00000
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}
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};
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#elif defined(CONFIG_MTD_PB1500_BOOT) && !defined(CONFIG_MTD_PB1500_USER)
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#define WINDOW_ADDR 0x1E000000
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#define WINDOW_SIZE 0x2000000
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static struct mtd_partition pb1xxx_partitions[] = {
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{
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.name = "User FS",
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.size = 0x1c00000,
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.offset = 0x0000000
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},{
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.name = "yamon",
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.size = 0x0100000,
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.offset = 0x1c00000,
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.mask_flags = MTD_WRITEABLE
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},{
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.name = "raw kernel",
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.size = 0x02c0000,
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.offset = 0x1d00000
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}
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};
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#elif !defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER)
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#define WINDOW_ADDR 0x1C000000
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#define WINDOW_SIZE 0x2000000
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static struct mtd_partition pb1xxx_partitions[] = {
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{
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.name = "User FS",
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.size = 0x1e00000,
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.offset = 0x0000000
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},{
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.name = "raw kernel",
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.size = 0x0200000,
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.offset = 0x1e00000,
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}
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};
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#else
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#error MTD_PB1500 define combo error /* should never happen */
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#endif
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#else
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#error Unsupported board
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#endif
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#define NAME "Pb1x00 Linux Flash"
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#define PADDR WINDOW_ADDR
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#define BUSWIDTH 4
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#define SIZE WINDOW_SIZE
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#define PARTITIONS 4
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static struct map_info pb1xxx_mtd_map = {
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.name = NAME,
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.size = SIZE,
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.bankwidth = BUSWIDTH,
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.phys = PADDR,
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};
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static struct mtd_info *pb1xxx_mtd;
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int __init pb1xxx_mtd_init(void)
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{
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struct mtd_partition *parts;
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int nb_parts = 0;
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char *part_type;
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/*
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* Static partition definition selection
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*/
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part_type = "static";
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parts = pb1xxx_partitions;
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nb_parts = ARRAY_SIZE(pb1xxx_partitions);
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/*
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* Now let's probe for the actual flash. Do it here since
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* specific machine settings might have been set above.
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*/
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printk(KERN_NOTICE "Pb1xxx flash: probing %d-bit flash bus\n",
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BUSWIDTH*8);
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pb1xxx_mtd_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
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simple_map_init(&pb1xxx_mtd_map);
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pb1xxx_mtd = do_map_probe("cfi_probe", &pb1xxx_mtd_map);
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if (!pb1xxx_mtd) return -ENXIO;
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pb1xxx_mtd->owner = THIS_MODULE;
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add_mtd_partitions(pb1xxx_mtd, parts, nb_parts);
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return 0;
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}
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static void __exit pb1xxx_mtd_cleanup(void)
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{
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if (pb1xxx_mtd) {
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del_mtd_partitions(pb1xxx_mtd);
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map_destroy(pb1xxx_mtd);
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iounmap((void *) pb1xxx_mtd_map.virt);
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}
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}
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module_init(pb1xxx_mtd_init);
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module_exit(pb1xxx_mtd_cleanup);
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MODULE_AUTHOR("Pete Popov");
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MODULE_DESCRIPTION("Pb1xxx CFI map driver");
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MODULE_LICENSE("GPL");
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