patch-2.4.0-test4 linux/drivers/mtd/pnc2000.c

• Lines: 211
• Date: Thu Jul 13 10:19:55 2000
• Orig file: v2.4.0-test3/linux/drivers/mtd/pnc2000.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test3/linux/drivers/mtd/pnc2000.c linux/drivers/mtd/pnc2000.c
@@ -0,0 +1,210 @@
+/*
+ *	pnc2000.c - mapper for Photron PNC-2000 board.
+ *
+ * Copyright (C) 2000 Crossnet Co. <info@crossnet.co.jp>
+ *
+ * This code is GPL
+ *
+ * $Id: pnc2000.c,v 1.1 2000/07/12 09:34:32 dwmw2 Exp $
+ */
+
+#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 0xbf000000
+#define WINDOW_SIZE 0x00400000
+
+/* 
+ * MAP DRIVER STUFF
+ */
+
+__u8 pnc_read8(struct map_info *map, unsigned long ofs)
+{
+  return *(__u8 *)(WINDOW_ADDR + ofs);
+}
+
+__u16 pnc_read16(struct map_info *map, unsigned long ofs)
+{
+  return *(__u16 *)(WINDOW_ADDR + ofs);
+}
+
+__u32 pnc_read32(struct map_info *map, unsigned long ofs)
+{
+  return *(volatile unsigned int *)(WINDOW_ADDR + ofs);
+}
+
+void pnc_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+  memcpy(to, (void *)(WINDOW_ADDR + from), len);
+}
+
+void pnc_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+  *(__u8 *)(WINDOW_ADDR + adr) = d;
+}
+
+void pnc_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+  *(__u16 *)(WINDOW_ADDR + adr) = d;
+}
+
+void pnc_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+  *(__u32 *)(WINDOW_ADDR + adr) = d;
+}
+
+void pnc_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 pnc_map = {
+  "PNC-2000",
+  WINDOW_SIZE,
+  4,
+  pnc_read8,
+  pnc_read16,
+  pnc_read32,
+  pnc_copy_from,
+  pnc_write8,
+  pnc_write16,
+  pnc_write32,
+  pnc_copy_to,
+  0,
+  0
+};
+
+
+/*
+ * MTD 'PARTITIONING' STUFF 
+ */
+
+/* 
+ * This is the _real_ MTD device for which all the others are just
+ * auto-relocating aliases.
+ */
+static struct mtd_info *mymtd;
+
+/* 
+ * MTD methods which simply translate the effective address and pass through
+ * to the _real_ device.
+ */
+
+static int pnc_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 pnc_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 pnc_mtd_erase (struct mtd_info *mtd, struct erase_info *instr)
+{
+	instr->addr += (unsigned long)mtd->priv;
+	return mymtd->erase(mymtd, instr);
+}
+
+static void pnc_mtd_sync (struct mtd_info *mtd)
+{
+	mymtd->sync(mymtd);
+}
+
+static int pnc_mtd_suspend (struct mtd_info *mtd)
+{
+	return mymtd->suspend(mymtd);
+}
+
+static void pnc_mtd_resume (struct mtd_info *mtd)
+{
+	mymtd->resume(mymtd);
+}
+
+
+static struct mtd_info pnc_mtds[3] = {  /* boot, kernel, fs */
+	{
+		type: MTD_NORFLASH,
+		flags: MTD_CAP_NORFLASH,
+		size: 0x20000,
+		erasesize: 0x20000,
+		name: "PNC-2000 boot firmware",
+		module: THIS_MODULE,
+		erase: pnc_mtd_erase,
+		read: pnc_mtd_read,
+		write: pnc_mtd_write,
+		suspend: pnc_mtd_suspend,
+		resume: pnc_mtd_resume,
+		sync: pnc_mtd_sync,
+		priv: (void *)0
+	},
+	{
+		type: MTD_NORFLASH,
+		flags: MTD_CAP_NORFLASH,
+		size: 0x1a0000,
+		erasesize: 0x20000,
+		name: "PNC-2000 kernel",
+		module: THIS_MODULE,
+		erase: pnc_mtd_erase,
+		read: pnc_mtd_read,
+		write: pnc_mtd_write,
+		suspend: pnc_mtd_suspend,
+		resume: pnc_mtd_resume,
+		sync: pnc_mtd_sync,
+		priv: (void *)0x20000
+	},
+	{
+		type: MTD_NORFLASH,
+		flags: MTD_CAP_NORFLASH,
+		size: 0x240000,
+		erasesize: 0x20000,
+		name: "PNC-2000 filesystem",
+		module: THIS_MODULE,
+		erase: pnc_mtd_erase,
+		read: pnc_mtd_read,
+		write: pnc_mtd_write,
+		suspend: pnc_mtd_suspend,
+		resume: pnc_mtd_resume,
+		sync: pnc_mtd_sync,
+		priv: (void *)0x1c0000
+	}
+};
+
+#if LINUX_VERSION_CODE < 0x20300
+#ifdef MODULE
+#define init_pnc init_module
+#define cleanup_pnc cleanup_module
+#endif
+#endif
+
+int __init init_pnc(void)
+{
+       	printk(KERN_NOTICE "Photron PNC-2000 flash mapping: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
+
+	mymtd = do_cfi_probe(&pnc_map);
+	if (mymtd) {
+		mymtd->module = THIS_MODULE;
+		
+		add_mtd_device(&pnc_mtds[0]); /* boot */
+		add_mtd_device(&pnc_mtds[1]); /* kernel */
+		add_mtd_device(&pnc_mtds[2]); /* file system */
+		return 0;
+	}
+
+	return -ENXIO;
+}
+
+static void __exit cleanup_pnc(void)
+{
+	if (mymtd) {
+		del_mtd_device(&pnc_mtds[2]);
+		del_mtd_device(&pnc_mtds[1]);
+		del_mtd_device(&pnc_mtds[0]);
+		map_destroy(mymtd);
+	}
+}