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Pete Popov
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Thomas Gleixner
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May 23, 2005
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| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: d30f11d22549c54e9b05d153e37d166f88a2aa43 | ||
| refs/heads/master: 002fa30170f9500ac31fa22931c689029af7f27b |
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| /* | ||
| * Flash memory access on AMD Alchemy evaluation boards | ||
| * | ||
| * $Id: alchemy-flash.c,v 1.1 2005/02/27 21:50:21 ppopov 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> | ||
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|
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| #include <linux/mtd/mtd.h> | ||
| #include <linux/mtd/map.h> | ||
| #include <linux/mtd/partitions.h> | ||
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| #include <asm/io.h> | ||
|
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| #ifdef DEBUG_RW | ||
| #define DBG(x...) printk(x) | ||
| #else | ||
| #define DBG(x...) | ||
| #endif | ||
|
|
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| #ifdef CONFIG_MIPS_PB1000 | ||
| #define BOARD_MAP_NAME "Pb1000 Flash" | ||
| #define BOARD_FLASH_SIZE 0x00800000 /* 8MB */ | ||
| #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | ||
| #endif | ||
|
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| #ifdef CONFIG_MIPS_PB1500 | ||
| #define BOARD_MAP_NAME "Pb1500 Flash" | ||
| #define BOARD_FLASH_SIZE 0x04000000 /* 64MB */ | ||
| #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | ||
| #endif | ||
|
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| #ifdef CONFIG_MIPS_PB1100 | ||
| #define BOARD_MAP_NAME "Pb1100 Flash" | ||
| #define BOARD_FLASH_SIZE 0x04000000 /* 64MB */ | ||
| #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | ||
| #endif | ||
|
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| #ifdef CONFIG_MIPS_PB1550 | ||
| #define BOARD_MAP_NAME "Pb1550 Flash" | ||
| #define BOARD_FLASH_SIZE 0x08000000 /* 128MB */ | ||
| #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | ||
| #endif | ||
|
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| #ifdef CONFIG_MIPS_PB1200 | ||
| #define BOARD_MAP_NAME "Pb1200 Flash" | ||
| #define BOARD_FLASH_SIZE 0x08000000 /* 128MB */ | ||
| #define BOARD_FLASH_WIDTH 2 /* 16-bits */ | ||
| #endif | ||
|
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| #ifdef CONFIG_MIPS_DB1000 | ||
| #define BOARD_MAP_NAME "Db1000 Flash" | ||
| #define BOARD_FLASH_SIZE 0x02000000 /* 32MB */ | ||
| #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | ||
| #endif | ||
|
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| #ifdef CONFIG_MIPS_DB1500 | ||
| #define BOARD_MAP_NAME "Db1500 Flash" | ||
| #define BOARD_FLASH_SIZE 0x02000000 /* 32MB */ | ||
| #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | ||
| #endif | ||
|
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||
| #ifdef CONFIG_MIPS_DB1100 | ||
| #define BOARD_MAP_NAME "Db1100 Flash" | ||
| #define BOARD_FLASH_SIZE 0x02000000 /* 32MB */ | ||
| #define BOARD_FLASH_WIDTH 4 /* 32-bits */ | ||
| #endif | ||
|
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||
| #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 | ||
|
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||
| #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 | ||
|
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| #ifdef CONFIG_MIPS_BOSPORUS | ||
| #define BOARD_MAP_NAME "Bosporus Flash" | ||
| #define BOARD_FLASH_SIZE 0x01000000 /* 16MB */ | ||
| #define BOARD_FLASH_WIDTH 2 /* 16-bits */ | ||
| #endif | ||
|
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| #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 | ||
|
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| static struct map_info alchemy_map = { | ||
| .name = BOARD_MAP_NAME, | ||
| }; | ||
|
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| 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, | ||
| } | ||
| }; | ||
|
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| #define NB_OF(x) (sizeof(x)/sizeof(x[0])) | ||
|
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| static struct mtd_info *mymtd; | ||
|
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| int __init alchemy_mtd_init(void) | ||
| { | ||
| struct mtd_partition *parts; | ||
| int nb_parts = 0; | ||
| unsigned long window_addr; | ||
| unsigned long window_size; | ||
|
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| /* Default flash buswidth */ | ||
| alchemy_map.bankwidth = BOARD_FLASH_WIDTH; | ||
|
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| 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 | ||
|
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| /* | ||
| * Static partition definition selection | ||
| */ | ||
| parts = alchemy_partitions; | ||
| nb_parts = NB_OF(alchemy_partitions); | ||
| alchemy_map.size = window_size; | ||
|
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| /* | ||
| * 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; | ||
|
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| add_mtd_partitions(mymtd, parts, nb_parts); | ||
| return 0; | ||
| } | ||
|
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| static void __exit alchemy_mtd_cleanup(void) | ||
| { | ||
| if (mymtd) { | ||
| del_mtd_partitions(mymtd); | ||
| map_destroy(mymtd); | ||
| iounmap(alchemy_map.virt); | ||
| } | ||
| } | ||
|
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| module_init(alchemy_mtd_init); | ||
| module_exit(alchemy_mtd_cleanup); | ||
|
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| MODULE_AUTHOR("Embedded Alley Solutions, Inc"); | ||
| MODULE_DESCRIPTION(BOARD_MAP_NAME " MTD driver"); | ||
| MODULE_LICENSE("GPL"); |
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