patch-2.4.21 linux-2.4.21/drivers/mtd/maps/physmap64.c
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- Lines: 200
- Date:
2003-06-13 07:51:34.000000000 -0700
- Orig file:
linux-2.4.20/drivers/mtd/maps/physmap64.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.20/drivers/mtd/maps/physmap64.c linux-2.4.21/drivers/mtd/maps/physmap64.c
@@ -0,0 +1,199 @@
+/*
+ * $Id: physmap64.c,v 1.1 2002/09/05 05:12:32 acurtis Exp $
+ *
+ * Normal mappings of chips in physical memory
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/config.h>
+#include <linux/mtd/cfi.h>
+
+#ifdef CONFIG_MTD_PARTITIONS
+#include <linux/mtd/partitions.h>
+#endif
+
+#define WINDOW_ADDR CONFIG_MTD_PHYSMAP_START
+#define WINDOW_SIZE CONFIG_MTD_PHYSMAP_LEN
+#define BUSWIDTH CONFIG_MTD_PHYSMAP_BUSWIDTH
+
+static struct mtd_info *mymtd;
+
+__u8 physmap_read8(struct map_info *map, unsigned long ofs)
+{
+ return __raw_readb(map->map_priv_1 + ofs);
+}
+
+__u16 physmap_read16(struct map_info *map, unsigned long ofs)
+{
+ return __raw_readw(map->map_priv_1 + ofs);
+}
+
+__u32 physmap_read32(struct map_info *map, unsigned long ofs)
+{
+ return __raw_readl(map->map_priv_1 + ofs);
+}
+
+__u64 physmap_read64(struct map_info *map, unsigned long ofs)
+{
+ return __raw_readll(map->map_priv_1 + ofs);
+}
+
+void physmap_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+ memcpy_fromio(to, map->map_priv_1 + from, len);
+}
+
+void physmap_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+ __raw_writeb(d, map->map_priv_1 + adr);
+ mb();
+}
+
+void physmap_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+ __raw_writew(d, map->map_priv_1 + adr);
+ mb();
+}
+
+void physmap_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+ __raw_writel(d, map->map_priv_1 + adr);
+ mb();
+}
+
+void physmap_write64(struct map_info *map, __u64 d, unsigned long adr)
+{
+ __raw_writell(d, map->map_priv_1 + adr);
+ mb();
+}
+
+void physmap_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+ memcpy_toio(map->map_priv_1 + to, from, len);
+}
+
+struct map_info physmap_map = {
+ name: "Physically mapped flash",
+ size: WINDOW_SIZE,
+ buswidth: BUSWIDTH,
+ read8: physmap_read8,
+ read16: physmap_read16,
+ read32: physmap_read32,
+ read64: physmap_read64,
+ copy_from: physmap_copy_from,
+ write8: physmap_write8,
+ write16: physmap_write16,
+ write32: physmap_write32,
+ write64: physmap_write64,
+ copy_to: physmap_copy_to
+};
+
+#ifdef CONFIG_MTD_PARTITIONS
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+static struct mtd_partition *mtd_parts = 0;
+static int mtd_parts_nb = 0;
+#else
+static struct mtd_partition physmap_partitions[] = {
+/* Put your own partition definitions here */
+#if 0
+ {
+ name: "bootROM",
+ size: 0x80000,
+ offset: 0,
+ mask_flags: MTD_WRITEABLE, /* force read-only */
+ }, {
+ name: "zImage",
+ size: 0x100000,
+ offset: MTDPART_OFS_APPEND,
+ mask_flags: MTD_WRITEABLE, /* force read-only */
+ }, {
+ name: "ramdisk.gz",
+ size: 0x300000,
+ offset: MTDPART_OFS_APPEND,
+ mask_flags: MTD_WRITEABLE, /* force read-only */
+ }, {
+ name: "User FS",
+ size: MTDPART_SIZ_FULL,
+ offset: MTDPART_OFS_APPEND,
+ }
+#endif
+};
+
+#define NUM_PARTITIONS (sizeof(physmap_partitions)/sizeof(struct mtd_partition))
+
+#endif
+#endif
+
+int __init init_physmap(void)
+{
+ static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", 0 };
+ const char **type;
+
+ printk(KERN_NOTICE "physmap flash device: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
+ physmap_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
+
+ if (!physmap_map.map_priv_1) {
+ printk("Failed to ioremap\n");
+ return -EIO;
+ }
+
+ mymtd = 0;
+ type = rom_probe_types;
+ for(; !mymtd && *type; type++) {
+ mymtd = do_map_probe(*type, &physmap_map);
+ }
+ if (mymtd) {
+ mymtd->module = THIS_MODULE;
+
+ add_mtd_device(mymtd);
+#ifdef CONFIG_MTD_PARTITIONS
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+ mtd_parts_nb = parse_cmdline_partitions(mymtd, &mtd_parts,
+ "phys");
+ if (mtd_parts_nb > 0)
+ {
+ printk(KERN_NOTICE
+ "Using command line partition definition\n");
+ add_mtd_partitions (mymtd, mtd_parts, mtd_parts_nb);
+ }
+#else
+ if (NUM_PARTITIONS != 0)
+ {
+ printk(KERN_NOTICE
+ "Using physmap partition definition\n");
+ add_mtd_partitions (mymtd, physmap_partitions, NUM_PARTITIONS);
+ }
+
+#endif
+#endif
+ return 0;
+ }
+
+ iounmap((void *)physmap_map.map_priv_1);
+ return -ENXIO;
+}
+
+static void __exit cleanup_physmap(void)
+{
+ if (mymtd) {
+ del_mtd_device(mymtd);
+ map_destroy(mymtd);
+ }
+ if (physmap_map.map_priv_1) {
+ iounmap((void *)physmap_map.map_priv_1);
+ physmap_map.map_priv_1 = 0;
+ }
+}
+
+module_init(init_physmap);
+module_exit(cleanup_physmap);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_DESCRIPTION("Generic configurable MTD map driver");
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