patch-2.4.0-test4 linux/drivers/mtd/pnc2000.c
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- 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);
+ }
+}
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