patch-2.4.19 linux-2.4.19/drivers/mtd/maps/pb1xxx-flash.c

• Lines: 254
• Date: Fri Aug 2 17:39:44 2002
• Orig file: linux-2.4.18/drivers/mtd/maps/pb1xxx-flash.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/drivers/mtd/maps/pb1xxx-flash.c linux-2.4.19/drivers/mtd/maps/pb1xxx-flash.c
@@ -0,0 +1,253 @@
+/*
+ * Flash memory access on Alchemy Pb1xxx boards
+ * 
+ * (C) 2001 Pete Popov <ppopov@mvista.com>
+ * 
+ * $Id: pb1xxx-flash.c,v 1.2 2002/02/14 19:36:45 ppopov Exp $
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/io.h>
+#include <asm/au1000.h>
+
+#ifdef 	DEBUG_RW
+#define	DBG(x...)	printk(x)
+#else
+#define	DBG(x...)	
+#endif
+
+#ifdef CONFIG_MIPS_PB1000
+#define WINDOW_ADDR 0x1F800000
+#define WINDOW_SIZE 0x800000
+#endif
+
+__u8 physmap_read8(struct map_info *map, unsigned long ofs)
+{
+	__u8 ret;
+	ret = __raw_readb(map->map_priv_1 + ofs);
+	DBG("read8 from %x, %x\n", (unsigned)(map->map_priv_1 + ofs), ret);
+	return ret;
+}
+
+__u16 physmap_read16(struct map_info *map, unsigned long ofs)
+{
+	__u16 ret;
+	ret = __raw_readw(map->map_priv_1 + ofs);
+	DBG("read16 from %x, %x\n", (unsigned)(map->map_priv_1 + ofs), ret);
+	return ret;
+}
+
+__u32 physmap_read32(struct map_info *map, unsigned long ofs)
+{
+	__u32 ret;
+	ret = __raw_readl(map->map_priv_1 + ofs);
+	DBG("read32 from %x, %x\n", (unsigned)(map->map_priv_1 + ofs), ret);
+	return ret;
+}
+
+void physmap_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+	DBG("physmap_copy from %x to %x\n", (unsigned)from, (unsigned)to);
+	memcpy_fromio(to, map->map_priv_1 + from, len);
+}
+
+void physmap_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+	DBG("write8 at %x, %x\n", (unsigned)(map->map_priv_1 + adr), d);
+	__raw_writeb(d, map->map_priv_1 + adr);
+	mb();
+}
+
+void physmap_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+	DBG("write16 at %x, %x\n", (unsigned)(map->map_priv_1 + adr), d);
+	__raw_writew(d, map->map_priv_1 + adr);
+	mb();
+}
+
+void physmap_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+	DBG("write32 at %x, %x\n", (unsigned)(map->map_priv_1 + adr), d);
+	__raw_writel(d, map->map_priv_1 + adr);
+	mb();
+}
+
+void physmap_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+	DBG("physmap_copy_to %x from %x\n", (unsigned)to, (unsigned)from);
+	memcpy_toio(map->map_priv_1 + to, from, len);
+}
+
+
+
+static struct map_info pb1xxx_map = {
+	name:		"Pb1xxx flash",
+	read8: physmap_read8,
+	read16: physmap_read16,
+	read32: physmap_read32,
+	copy_from: physmap_copy_from,
+	write8: physmap_write8,
+	write16: physmap_write16,
+	write32: physmap_write32,
+	copy_to: physmap_copy_to,
+};
+
+
+#ifdef CONFIG_MIPS_PB1000
+
+static unsigned long flash_size = 0x00800000;
+static unsigned char flash_buswidth = 4;
+static struct mtd_partition pb1xxx_partitions[] = {
+        {
+                name: "yamon env",
+                size: 0x00020000,
+                offset: 0,
+                mask_flags: MTD_WRITEABLE
+        },{
+                name: "User FS",
+                size: 0x003e0000,
+                offset: 0x20000,
+        },{
+                name: "boot code",
+                size: 0x100000,
+                offset: 0x400000,
+                mask_flags: MTD_WRITEABLE
+        },{
+                name: "raw/kernel",
+                size: 0x300000,
+                offset: 0x500000
+        }
+};
+
+#elif defined(CONFIG_MIPS_PB1500)
+
+static unsigned char flash_buswidth = 4;
+#if defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER)
+/* both 32MB banks will be used. Combine the first 32MB bank and the
+ * first 28MB of the second bank together into a single jffs/jffs2
+ * partition.
+ */
+static unsigned long flash_size = 0x04000000;
+#define WINDOW_ADDR 0x1C000000
+#define WINDOW_SIZE 0x4000000
+static struct mtd_partition pb1xxx_partitions[] = {
+        {
+                name: "User FS",
+                size:   0x3c00000,
+                offset: 0x0000000
+        },{
+                name: "yamon",
+                size: 0x0100000,
+                offset: 0x3c00000,
+                mask_flags: MTD_WRITEABLE
+        },{
+                name: "raw kernel",
+                size: 0x02c0000,
+                offset: 0x3d00000
+        }
+};
+#elif defined(CONFIG_MTD_PB1500_BOOT) && !defined(CONFIG_MTD_PB1500_USER)
+static unsigned long flash_size = 0x02000000;
+#define WINDOW_ADDR 0x1E000000
+#define WINDOW_SIZE 0x2000000
+static struct mtd_partition pb1xxx_partitions[] = {
+        {
+                name: "User FS",
+                size:   0x1c00000,
+                offset: 0x0000000
+        },{
+                name: "yamon",
+                size: 0x0100000,
+                offset: 0x1c00000,
+                mask_flags: MTD_WRITEABLE
+        },{
+                name: "raw kernel",
+                size: 0x02c0000,
+                offset: 0x1d00000
+        }
+};
+#elif !defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER)
+static unsigned long flash_size = 0x02000000;
+#define WINDOW_ADDR 0x1C000000
+#define WINDOW_SIZE 0x2000000
+static struct mtd_partition pb1xxx_partitions[] = {
+        {
+                name: "User FS",
+                size:   0x1e00000,
+                offset: 0x0000000
+        },{
+                name: "raw kernel",
+                size: 0x0200000,
+                offset: 0x1e00000,
+        }
+};
+#else
+#error MTD_PB1500 define combo error /* should never happen */
+#endif
+#else
+#error Unsupported board
+#endif
+
+
+#define NB_OF(x)  (sizeof(x)/sizeof(x[0]))
+
+static struct mtd_partition *parsed_parts;
+static struct mtd_info *mymtd;
+
+int __init pb1xxx_mtd_init(void)
+{
+	struct mtd_partition *parts;
+	int nb_parts = 0;
+	char *part_type;
+	
+	/* Default flash buswidth */
+	pb1xxx_map.buswidth = flash_buswidth;
+
+	/*
+	 * Static partition definition selection
+	 */
+	part_type = "static";
+	parts = pb1xxx_partitions;
+	nb_parts = NB_OF(pb1xxx_partitions);
+	pb1xxx_map.size = flash_size;
+
+	/*
+	 * Now let's probe for the actual flash.  Do it here since
+	 * specific machine settings might have been set above.
+	 */
+	printk(KERN_NOTICE "Pb1xxx flash: probing %d-bit flash bus\n", 
+			pb1xxx_map.buswidth*8);
+	pb1xxx_map.map_priv_1 = 
+		(unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
+	mymtd = do_map_probe("cfi_probe", &pb1xxx_map);
+	if (!mymtd) return -ENXIO;
+	mymtd->module = THIS_MODULE;
+
+	add_mtd_partitions(mymtd, parts, nb_parts);
+	return 0;
+}
+
+static void __exit pb1xxx_mtd_cleanup(void)
+{
+	if (mymtd) {
+		del_mtd_partitions(mymtd);
+		map_destroy(mymtd);
+		if (parsed_parts)
+			kfree(parsed_parts);
+	}
+}
+
+module_init(pb1xxx_mtd_init);
+module_exit(pb1xxx_mtd_cleanup);
+
+MODULE_AUTHOR("Pete Popov");
+MODULE_DESCRIPTION("Pb1xxx CFI map driver");
+MODULE_LICENSE("GPL");