This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / drivers / mtd / maps / alchemy-flash.c

diff --git a/drivers/mtd/maps/alchemy-flash.c b/drivers/mtd/maps/alchemy-flash.c
new file mode 100644 (file)
index 0000000..b933a2a
--- /dev/null
+++ b/drivers/mtd/maps/alchemy-flash.c
@@ -0,0 +1,190 @@
+/*
+ * Flash memory access on AMD Alchemy evaluation boards
+ *
+ * $Id: alchemy-flash.c,v 1.2 2005/11/07 11:14:26 gleixner Exp $
+ *
+ * (C) 2003, 2004 Pete Popov <ppopov@embeddedalley.com>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/init.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>
+
+#ifdef         DEBUG_RW
+#define        DBG(x...)       printk(x)
+#else
+#define        DBG(x...)
+#endif
+
+#ifdef CONFIG_MIPS_PB1000
+#define BOARD_MAP_NAME "Pb1000 Flash"
+#define BOARD_FLASH_SIZE 0x00800000 /* 8MB */
+#define BOARD_FLASH_WIDTH 4 /* 32-bits */
+#endif
+
+#ifdef CONFIG_MIPS_PB1500
+#define BOARD_MAP_NAME "Pb1500 Flash"
+#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
+#define BOARD_FLASH_WIDTH 4 /* 32-bits */
+#endif
+
+#ifdef CONFIG_MIPS_PB1100
+#define BOARD_MAP_NAME "Pb1100 Flash"
+#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
+#define BOARD_FLASH_WIDTH 4 /* 32-bits */
+#endif
+
+#ifdef CONFIG_MIPS_PB1550
+#define BOARD_MAP_NAME "Pb1550 Flash"
+#define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
+#define BOARD_FLASH_WIDTH 4 /* 32-bits */
+#endif
+
+#ifdef CONFIG_MIPS_PB1200
+#define BOARD_MAP_NAME "Pb1200 Flash"
+#define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
+#define BOARD_FLASH_WIDTH 2 /* 16-bits */
+#endif
+
+#ifdef CONFIG_MIPS_DB1000
+#define BOARD_MAP_NAME "Db1000 Flash"
+#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
+#define BOARD_FLASH_WIDTH 4 /* 32-bits */
+#endif
+
+#ifdef CONFIG_MIPS_DB1500
+#define BOARD_MAP_NAME "Db1500 Flash"
+#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
+#define BOARD_FLASH_WIDTH 4 /* 32-bits */
+#endif
+
+#ifdef CONFIG_MIPS_DB1100
+#define BOARD_MAP_NAME "Db1100 Flash"
+#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
+#define BOARD_FLASH_WIDTH 4 /* 32-bits */
+#endif
+
+#ifdef CONFIG_MIPS_DB1550
+#define BOARD_MAP_NAME "Db1550 Flash"
+#define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
+#define BOARD_FLASH_WIDTH 4 /* 32-bits */
+#endif
+
+#ifdef CONFIG_MIPS_DB1200
+#define BOARD_MAP_NAME "Db1200 Flash"
+#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
+#define BOARD_FLASH_WIDTH 2 /* 16-bits */
+#endif
+
+#ifdef CONFIG_MIPS_HYDROGEN3
+#define BOARD_MAP_NAME "Hydrogen3 Flash"
+#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
+#define BOARD_FLASH_WIDTH 4 /* 32-bits */
+#define USE_LOCAL_ACCESSORS /* why? */
+#endif
+
+#ifdef CONFIG_MIPS_BOSPORUS
+#define BOARD_MAP_NAME "Bosporus Flash"
+#define BOARD_FLASH_SIZE 0x01000000 /* 16MB */
+#define BOARD_FLASH_WIDTH 2 /* 16-bits */
+#endif
+
+#ifdef CONFIG_MIPS_MIRAGE
+#define BOARD_MAP_NAME "Mirage Flash"
+#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
+#define BOARD_FLASH_WIDTH 4 /* 32-bits */
+#define USE_LOCAL_ACCESSORS /* why? */
+#endif
+
+static struct map_info alchemy_map = {
+       .name = BOARD_MAP_NAME,
+};
+
+static struct mtd_partition alchemy_partitions[] = {
+        {
+                .name = "User FS",
+                .size = BOARD_FLASH_SIZE - 0x00400000,
+                .offset = 0x0000000
+        },{
+                .name = "YAMON",
+                .size = 0x0100000,
+               .offset = MTDPART_OFS_APPEND,
+                .mask_flags = MTD_WRITEABLE
+        },{
+                .name = "raw kernel",
+               .size = (0x300000 - 0x40000), /* last 256KB is yamon env */
+               .offset = MTDPART_OFS_APPEND,
+        }
+};
+
+static struct mtd_info *mymtd;
+
+int __init alchemy_mtd_init(void)
+{
+       struct mtd_partition *parts;
+       int nb_parts = 0;
+       unsigned long window_addr;
+       unsigned long window_size;
+
+       /* Default flash buswidth */
+       alchemy_map.bankwidth = BOARD_FLASH_WIDTH;
+
+       window_addr = 0x20000000 - BOARD_FLASH_SIZE;
+       window_size = BOARD_FLASH_SIZE;
+#ifdef CONFIG_MIPS_MIRAGE_WHY
+       /* Boot ROM flash bank only; no user bank */
+       window_addr = 0x1C000000;
+       window_size = 0x04000000;
+       /* USERFS from 0x1C00 0000 to 0x1FC00000 */
+       alchemy_partitions[0].size = 0x03C00000;
+#endif
+
+       /*
+        * Static partition definition selection
+        */
+       parts = alchemy_partitions;
+       nb_parts = ARRAY_SIZE(alchemy_partitions);
+       alchemy_map.size = window_size;
+
+       /*
+        * Now let's probe for the actual flash.  Do it here since
+        * specific machine settings might have been set above.
+        */
+       printk(KERN_NOTICE BOARD_MAP_NAME ": probing %d-bit flash bus\n",
+                       alchemy_map.bankwidth*8);
+       alchemy_map.virt = ioremap(window_addr, window_size);
+       mymtd = do_map_probe("cfi_probe", &alchemy_map);
+       if (!mymtd) {
+               iounmap(alchemy_map.virt);
+               return -ENXIO;
+       }
+       mymtd->owner = THIS_MODULE;
+
+       add_mtd_partitions(mymtd, parts, nb_parts);
+       return 0;
+}
+
+static void __exit alchemy_mtd_cleanup(void)
+{
+       if (mymtd) {
+               del_mtd_partitions(mymtd);
+               map_destroy(mymtd);
+               iounmap(alchemy_map.virt);
+       }
+}
+
+module_init(alchemy_mtd_init);
+module_exit(alchemy_mtd_cleanup);
+
+MODULE_AUTHOR("Embedded Alley Solutions, Inc");
+MODULE_DESCRIPTION(BOARD_MAP_NAME " MTD driver");
+MODULE_LICENSE("GPL");