Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 226 insertions, 0 deletions

diff --git a/drivers/mtd/maps/db1x00-flash.c b/drivers/mtd/maps/db1x00-flash.c
new file mode 100644
index 00000000000..faa68ec5690
--- /dev/null
+++ b/drivers/mtd/maps/db1x00-flash.c
@@ -0,0 +1,226 @@
+/*
+ * Flash memory access on Alchemy Db1xxx boards
+ * 
+ * $Id: db1x00-flash.c,v 1.6 2004/11/04 13:24:14 gleixner Exp $
+ *
+ * (C) 2003 Pete Popov <ppopov@embeddedalley.com>
+ * 
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/io.h>
+
+#ifdef 	DEBUG_RW
+#define	DBG(x...)	printk(x)
+#else
+#define	DBG(x...)	
+#endif
+
+/* MTD CONFIG OPTIONS */
+#if defined(CONFIG_MTD_DB1X00_BOOT) && defined(CONFIG_MTD_DB1X00_USER)
+#define DB1X00_BOTH_BANKS
+#elif defined(CONFIG_MTD_DB1X00_BOOT) && !defined(CONFIG_MTD_DB1X00_USER)
+#define DB1X00_BOOT_ONLY
+#elif !defined(CONFIG_MTD_DB1X00_BOOT) && defined(CONFIG_MTD_DB1X00_USER)
+#define DB1X00_USER_ONLY
+#endif
+
+static unsigned long window_addr;
+static unsigned long window_size;
+static unsigned long flash_size;
+
+static unsigned short *bcsr = (unsigned short *)0xAE000000;
+static unsigned char flash_bankwidth = 4;
+
+/* 
+ * The Db1x boards support different flash densities. We setup
+ * the mtd_partition structures below for default of 64Mbit 
+ * flash densities, and override the partitions sizes, if
+ * necessary, after we check the board status register.
+ */
+
+#ifdef DB1X00_BOTH_BANKS
+/* both banks will be used. Combine the first bank and the first 
+ * part of the second bank together into a single jffs/jffs2
+ * partition.
+ */
+static struct mtd_partition db1x00_partitions[] = {
+        {
+                .name         =  "User FS",
+                .size         =  0x1c00000,
+                .offset       =  0x0000000
+        },{
+                .name         =  "yamon",
+                .size         =  0x0100000,
+		.offset       =  MTDPART_OFS_APPEND,
+                .mask_flags   =  MTD_WRITEABLE
+        },{
+                .name         =  "raw kernel",
+		.size         =  (0x300000-0x40000), /* last 256KB is env */
+		.offset       =  MTDPART_OFS_APPEND,
+        }
+};
+#elif defined(DB1X00_BOOT_ONLY)
+static struct mtd_partition db1x00_partitions[] = {
+        {
+                .name         =  "User FS",
+                .size         =  0x00c00000,
+                .offset       =  0x0000000
+        },{
+                .name         =  "yamon",
+                .size         =  0x0100000,
+		.offset       =  MTDPART_OFS_APPEND,
+                .mask_flags   =  MTD_WRITEABLE
+        },{
+                .name         =  "raw kernel",
+		.size         =  (0x300000-0x40000), /* last 256KB is env */
+		.offset       =  MTDPART_OFS_APPEND,
+        }
+};
+#elif defined(DB1X00_USER_ONLY)
+static struct mtd_partition db1x00_partitions[] = {
+        {
+                .name         =  "User FS",
+                .size         =  0x0e00000,
+                .offset       =  0x0000000
+        },{
+                .name         =  "raw kernel",
+		.size         =  MTDPART_SIZ_FULL,
+		.offset       =  MTDPART_OFS_APPEND,
+        }
+};
+#else
+#error MTD_DB1X00 define combo error /* should never happen */
+#endif
+#define NB_OF(x)  (sizeof(x)/sizeof(x[0]))
+
+#define NAME     	"Db1x00 Linux Flash"
+
+static struct map_info db1xxx_mtd_map = {
+	.name		= NAME,
+};
+
+static struct mtd_partition *parsed_parts;
+static struct mtd_info *db1xxx_mtd;
+
+/*
+ * Probe the flash density and setup window address and size
+ * based on user CONFIG options. There are times when we don't
+ * want the MTD driver to be probing the boot or user flash,
+ * so having the option to enable only one bank is important.
+ */
+int setup_flash_params(void)
+{
+	switch ((bcsr[2] >> 14) & 0x3) {
+		case 0: /* 64Mbit devices */
+			flash_size = 0x800000; /* 8MB per part */
+#if defined(DB1X00_BOTH_BANKS)
+			window_addr = 0x1E000000;
+			window_size = 0x2000000; 
+#elif defined(DB1X00_BOOT_ONLY)
+			window_addr = 0x1F000000;
+			window_size = 0x1000000; 
+#else /* USER ONLY */
+			window_addr = 0x1E000000;
+			window_size = 0x1000000; 
+#endif
+			break;
+		case 1:
+			/* 128 Mbit devices */
+			flash_size = 0x1000000; /* 16MB per part */
+#if defined(DB1X00_BOTH_BANKS)
+			window_addr = 0x1C000000;
+			window_size = 0x4000000;
+			/* USERFS from 0x1C00 0000 to 0x1FC0 0000 */
+			db1x00_partitions[0].size = 0x3C00000;
+#elif defined(DB1X00_BOOT_ONLY)
+			window_addr = 0x1E000000;
+			window_size = 0x2000000;
+			/* USERFS from 0x1E00 0000 to 0x1FC0 0000 */
+			db1x00_partitions[0].size = 0x1C00000;
+#else /* USER ONLY */
+			window_addr = 0x1C000000;
+			window_size = 0x2000000;
+			/* USERFS from 0x1C00 0000 to 0x1DE00000 */
+			db1x00_partitions[0].size = 0x1DE0000;
+#endif
+			break;
+		case 2:
+			/* 256 Mbit devices */
+			flash_size = 0x4000000; /* 64MB per part */
+#if defined(DB1X00_BOTH_BANKS)
+			return 1;
+#elif defined(DB1X00_BOOT_ONLY)
+			/* Boot ROM flash bank only; no user bank */
+			window_addr = 0x1C000000;
+			window_size = 0x4000000;
+			/* USERFS from 0x1C00 0000 to 0x1FC00000 */
+			db1x00_partitions[0].size = 0x3C00000;
+#else /* USER ONLY */
+			return 1;
+#endif
+			break;
+		default:
+			return 1;
+	}
+	db1xxx_mtd_map.size = window_size;
+	db1xxx_mtd_map.bankwidth = flash_bankwidth;
+	db1xxx_mtd_map.phys = window_addr;
+	db1xxx_mtd_map.bankwidth = flash_bankwidth;
+	return 0;
+}
+
+int __init db1x00_mtd_init(void)
+{
+	struct mtd_partition *parts;
+	int nb_parts = 0;
+	
+	if (setup_flash_params()) 
+		return -ENXIO;
+
+	/*
+	 * Static partition definition selection
+	 */
+	parts = db1x00_partitions;
+	nb_parts = NB_OF(db1x00_partitions);
+
+	/*
+	 * Now let's probe for the actual flash.  Do it here since
+	 * specific machine settings might have been set above.
+	 */
+	printk(KERN_NOTICE "Db1xxx flash: probing %d-bit flash bus\n", 
+			db1xxx_mtd_map.bankwidth*8);
+	db1xxx_mtd_map.virt = ioremap(window_addr, window_size);
+	db1xxx_mtd = do_map_probe("cfi_probe", &db1xxx_mtd_map);
+	if (!db1xxx_mtd) return -ENXIO;
+	db1xxx_mtd->owner = THIS_MODULE;
+
+	add_mtd_partitions(db1xxx_mtd, parts, nb_parts);
+	return 0;
+}
+
+static void __exit db1x00_mtd_cleanup(void)
+{
+	if (db1xxx_mtd) {
+		del_mtd_partitions(db1xxx_mtd);
+		map_destroy(db1xxx_mtd);
+		if (parsed_parts)
+			kfree(parsed_parts);
+	}
+}
+
+module_init(db1x00_mtd_init);
+module_exit(db1x00_mtd_cleanup);
+
+MODULE_AUTHOR("Pete Popov");
+MODULE_DESCRIPTION("Db1x00 mtd map driver");
+MODULE_LICENSE("GPL");