patch-2.4.21 linux-2.4.21/drivers/mtd/maps/impa7.c
Next file: linux-2.4.21/drivers/mtd/maps/lasat.c
Previous file: linux-2.4.21/drivers/mtd/maps/ich2rom.c
Back to the patch index
Back to the overall index
- Lines: 235
- Date:
2003-06-13 07:51:34.000000000 -0700
- Orig file:
linux-2.4.20/drivers/mtd/maps/impa7.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.20/drivers/mtd/maps/impa7.c linux-2.4.21/drivers/mtd/maps/impa7.c
@@ -0,0 +1,234 @@
+/*
+ * $Id: impa7.c,v 1.2 2002/09/05 05:11:24 acurtis Exp $
+ *
+ * Handle mapping of the NOR flash on implementa A7 boards
+ *
+ * Copyright 2002 SYSGO Real-Time Solutions GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#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>
+
+#ifdef CONFIG_MTD_PARTITIONS
+#include <linux/mtd/partitions.h>
+#endif
+
+#define WINDOW_ADDR0 0x00000000 /* physical properties of flash */
+#define WINDOW_SIZE0 0x00800000
+#define WINDOW_ADDR1 0x10000000 /* physical properties of flash */
+#define WINDOW_SIZE1 0x00800000
+#define NUM_FLASHBANKS 2
+#define BUSWIDTH 4
+
+/* can be { "cfi_probe", "jedec_probe", "map_rom", 0 }; */
+#define PROBETYPES { "jedec_probe", 0 }
+
+#define MSG_PREFIX "impA7:" /* prefix for our printk()'s */
+#define MTDID "impa7-%d" /* for mtdparts= partitioning */
+
+static struct mtd_info *impa7_mtd[NUM_FLASHBANKS] = { 0 };
+
+__u8 impa7_read8(struct map_info *map, unsigned long ofs)
+{
+ return __raw_readb(map->map_priv_1 + ofs);
+}
+
+__u16 impa7_read16(struct map_info *map, unsigned long ofs)
+{
+ return __raw_readw(map->map_priv_1 + ofs);
+}
+
+__u32 impa7_read32(struct map_info *map, unsigned long ofs)
+{
+ return __raw_readl(map->map_priv_1 + ofs);
+}
+
+void impa7_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+ memcpy_fromio(to, map->map_priv_1 + from, len);
+}
+
+void impa7_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+ __raw_writeb(d, map->map_priv_1 + adr);
+ mb();
+}
+
+void impa7_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+ __raw_writew(d, map->map_priv_1 + adr);
+ mb();
+}
+
+void impa7_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+ __raw_writel(d, map->map_priv_1 + adr);
+ mb();
+}
+
+void impa7_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+ memcpy_toio(map->map_priv_1 + to, from, len);
+}
+
+static struct map_info impa7_map[NUM_FLASHBANKS] = {
+ {
+ name: "impA7 NOR Flash Bank #0",
+ size: WINDOW_SIZE0,
+ buswidth: BUSWIDTH,
+ read8: impa7_read8,
+ read16: impa7_read16,
+ read32: impa7_read32,
+ copy_from: impa7_copy_from,
+ write8: impa7_write8,
+ write16: impa7_write16,
+ write32: impa7_write32,
+ copy_to: impa7_copy_to
+ },
+ {
+ name: "impA7 NOR Flash Bank #1",
+ size: WINDOW_SIZE1,
+ buswidth: BUSWIDTH,
+ read8: impa7_read8,
+ read16: impa7_read16,
+ read32: impa7_read32,
+ copy_from: impa7_copy_from,
+ write8: impa7_write8,
+ write16: impa7_write16,
+ write32: impa7_write32,
+ copy_to: impa7_copy_to
+ },
+};
+
+#ifdef CONFIG_MTD_PARTITIONS
+
+/*
+ * MTD partitioning stuff
+ */
+static struct mtd_partition static_partitions[] =
+{
+ {
+ name: "FileSystem",
+ size: 0x800000,
+ offset: 0x00000000
+ },
+};
+
+#define NB_OF(x) (sizeof (x) / sizeof (x[0]))
+
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+int parse_cmdline_partitions(struct mtd_info *master,
+ struct mtd_partition **pparts,
+ const char *mtd_id);
+#endif
+
+#endif
+
+static int mtd_parts_nb = 0;
+static struct mtd_partition *mtd_parts = 0;
+
+int __init init_impa7(void)
+{
+ static const char *rom_probe_types[] = PROBETYPES;
+ const char **type;
+ const char *part_type = 0;
+ int i;
+ static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = {
+ { WINDOW_ADDR0, WINDOW_SIZE0 },
+ { WINDOW_ADDR1, WINDOW_SIZE1 },
+ };
+ char mtdid[10];
+ int devicesfound = 0;
+
+ for(i=0; i<NUM_FLASHBANKS; i++)
+ {
+ printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n",
+ pt[i].size, pt[i].addr);
+ impa7_map[i].map_priv_1 = (unsigned long)
+ ioremap(pt[i].addr, pt[i].size);
+
+ if (!impa7_map[i].map_priv_1) {
+ printk(MSG_PREFIX "failed to ioremap\n");
+ return -EIO;
+ }
+
+ impa7_mtd[i] = 0;
+ type = rom_probe_types;
+ for(; !impa7_mtd[i] && *type; type++) {
+ impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]);
+ }
+
+ if (impa7_mtd[i])
+ {
+ impa7_mtd[i]->module = THIS_MODULE;
+ add_mtd_device(impa7_mtd[i]);
+ devicesfound++;
+#ifdef CONFIG_MTD_PARTITIONS
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+ sprintf(mtdid, MTDID, i);
+ mtd_parts_nb = parse_cmdline_partitions(impa7_mtd[i],
+ &mtd_parts,
+ mtdid);
+ if (mtd_parts_nb > 0)
+ part_type = "command line";
+#endif
+ if (mtd_parts_nb <= 0)
+ {
+ mtd_parts = static_partitions;
+ mtd_parts_nb = NB_OF(static_partitions);
+ part_type = "static";
+ }
+ if (mtd_parts_nb <= 0)
+ {
+ printk(KERN_NOTICE MSG_PREFIX
+ "no partition info available\n");
+ }
+ else
+ {
+ printk(KERN_NOTICE MSG_PREFIX
+ "using %s partition definition\n",
+ part_type);
+ add_mtd_partitions(impa7_mtd[i],
+ mtd_parts, mtd_parts_nb);
+ }
+#endif
+ }
+ else
+ iounmap((void *)impa7_map[i].map_priv_1);
+ }
+ return devicesfound == 0 ? -ENXIO : 0;
+}
+
+static void __exit cleanup_impa7(void)
+{
+ int i;
+ for (i=0; i<NUM_FLASHBANKS; i++)
+ {
+ if (impa7_mtd[i])
+ {
+ del_mtd_device(impa7_mtd[i]);
+ map_destroy(impa7_mtd[i]);
+ }
+ if (impa7_map[i].map_priv_1)
+ {
+ iounmap((void *)impa7_map[i].map_priv_1);
+ impa7_map[i].map_priv_1 = 0;
+ }
+ }
+}
+
+module_init(init_impa7);
+module_exit(cleanup_impa7);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>");
+MODULE_DESCRIPTION("MTD map driver for implementa impA7");
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)