patch-2.4.6 linux/drivers/mtd/maps/nora.c

• Lines: 207
• Date: Tue Jun 12 10:30:27 2001
• Orig file: v2.4.5/linux/drivers/mtd/maps/nora.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/drivers/mtd/maps/nora.c linux/drivers/mtd/maps/nora.c
@@ -0,0 +1,206 @@
+/*
+ * $Id: nora.c,v 1.19 2001/04/26 15:40:23 dwmw2 Exp $
+ *
+ * This is so simple I love it.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+
+
+#define WINDOW_ADDR 0xd0000000
+#define WINDOW_SIZE 0x04000000
+
+static struct mtd_info *mymtd;
+
+__u8 nora_read8(struct map_info *map, unsigned long ofs)
+{
+  return *(__u8 *)(WINDOW_ADDR + ofs);
+}
+
+__u16 nora_read16(struct map_info *map, unsigned long ofs)
+{
+  return *(__u16 *)(WINDOW_ADDR + ofs);
+}
+
+__u32 nora_read32(struct map_info *map, unsigned long ofs)
+{
+  return *(__u32 *)(WINDOW_ADDR + ofs);
+}
+
+void nora_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+  memcpy(to, (void *)(WINDOW_ADDR + from), len);
+}
+
+void nora_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+  *(__u8 *)(WINDOW_ADDR + adr) = d;
+}
+
+void nora_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+  *(__u16 *)(WINDOW_ADDR + adr) = d;
+}
+
+void nora_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+  *(__u32 *)(WINDOW_ADDR + adr) = d;
+}
+
+void nora_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+  memcpy((void *)(WINDOW_ADDR + to), from, len);
+}
+
+struct map_info nora_map = {
+	name: "NORA",
+	size: WINDOW_SIZE,
+	buswidth: 2,
+	read8: nora_read8,
+	read16: nora_read16,
+	read32: nora_read32,
+	copy_from: nora_copy_from,
+	write8: nora_write8,
+	write16: nora_write16,
+	write32: nora_write32,
+	copy_to: nora_copy_to
+};
+
+
+static int nora_mtd_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
+{
+	return mymtd->read(mymtd, from + (unsigned long)mtd->priv, len, retlen, buf);
+}
+
+static int nora_mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
+{
+	return mymtd->write(mymtd, to + (unsigned long)mtd->priv, len, retlen, buf);
+}
+
+static int nora_mtd_erase (struct mtd_info *mtd, struct erase_info *instr)
+{
+	instr->addr += (unsigned long)mtd->priv;
+	return mymtd->erase(mymtd, instr);
+}
+
+static void nora_mtd_sync (struct mtd_info *mtd)
+{
+	mymtd->sync(mymtd);
+}
+
+static int nora_mtd_suspend (struct mtd_info *mtd)
+{
+	return mymtd->suspend(mymtd);
+}
+
+static void nora_mtd_resume (struct mtd_info *mtd)
+{
+	mymtd->resume(mymtd);
+}
+
+
+static struct mtd_info nora_mtds[4] = {  /* boot, kernel, ramdisk, fs */
+	{
+		type: MTD_NORFLASH,
+		flags: MTD_CAP_NORFLASH,
+		size: 0x60000,
+		erasesize: 0x20000,
+		name: "NORA boot firmware",
+		module: THIS_MODULE,
+		erase: nora_mtd_erase,
+		read: nora_mtd_read,
+		write: nora_mtd_write,
+		suspend: nora_mtd_suspend,
+		resume: nora_mtd_resume,
+		sync: nora_mtd_sync,
+		priv: (void *)0
+	},
+	{
+		type: MTD_NORFLASH,
+		flags: MTD_CAP_NORFLASH,
+		size: 0x0a0000,
+		erasesize: 0x20000,
+		name: "NORA kernel",
+		module: THIS_MODULE,
+		erase: nora_mtd_erase,
+		read: nora_mtd_read,
+		write: nora_mtd_write,
+		suspend: nora_mtd_suspend,
+		resume: nora_mtd_resume,
+		sync: nora_mtd_sync,
+		priv: (void *)0x60000
+	},
+	{
+		type: MTD_NORFLASH,
+		flags: MTD_CAP_NORFLASH,
+		size: 0x900000,
+		erasesize: 0x20000,
+		name: "NORA root filesystem",
+		module: THIS_MODULE,
+		erase: nora_mtd_erase,
+		read: nora_mtd_read,
+		write: nora_mtd_write,
+		suspend: nora_mtd_suspend,
+		resume: nora_mtd_resume,
+		sync: nora_mtd_sync,
+		priv: (void *)0x100000
+	},
+	{
+		type: MTD_NORFLASH,
+		flags: MTD_CAP_NORFLASH,
+		size: 0x1600000,
+		erasesize: 0x20000,
+		name: "NORA second filesystem",
+		module: THIS_MODULE,
+		erase: nora_mtd_erase,
+		read: nora_mtd_read,
+		write: nora_mtd_write,
+		suspend: nora_mtd_suspend,
+		resume: nora_mtd_resume,
+		sync: nora_mtd_sync,
+		priv: (void *)0xa00000
+	}
+};
+
+
+#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
+#define init_nora init_module
+#define cleanup_nora cleanup_module
+#endif
+
+int __init init_nora(void)
+{
+       	printk(KERN_NOTICE "nora flash device: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
+
+	mymtd = do_map_probe("cfi", &nora_map);
+	if (mymtd) {
+		mymtd->module = THIS_MODULE;
+		
+		add_mtd_device(&nora_mtds[2]);
+		add_mtd_device(&nora_mtds[0]);
+		add_mtd_device(&nora_mtds[1]);
+		add_mtd_device(&nora_mtds[3]);
+		return 0;
+	}
+
+	return -ENXIO;
+}
+
+static void __exit cleanup_nora(void)
+{
+	if (mymtd) {
+		del_mtd_device(&nora_mtds[3]);
+		del_mtd_device(&nora_mtds[1]);
+		del_mtd_device(&nora_mtds[0]);
+		del_mtd_device(&nora_mtds[2]);
+		map_destroy(mymtd);
+	}
+}
+
+module_init(init_nora);
+module_exit(cleanup_nora);