diff options
Diffstat (limited to 'linux-2.4.x/drivers/mtd/maps/octagon-5066.c')
| -rw-r--r-- | linux-2.4.x/drivers/mtd/maps/octagon-5066.c | 170 |
1 files changed, 67 insertions, 103 deletions
diff --git a/linux-2.4.x/drivers/mtd/maps/octagon-5066.c b/linux-2.4.x/drivers/mtd/maps/octagon-5066.c index 16cfd9a..a6642db 100644 --- a/linux-2.4.x/drivers/mtd/maps/octagon-5066.c +++ b/linux-2.4.x/drivers/mtd/maps/octagon-5066.c @@ -1,12 +1,12 @@ -// $Id: octagon-5066.c,v 1.19 2001/10/02 15:05:14 dwmw2 Exp $ +// $Id: octagon-5066.c,v 1.28 2005/11/07 11:14:27 gleixner Exp $ /* ###################################################################### - Octagon 5066 MTD Driver. - + Octagon 5066 MTD Driver. + The Octagon 5066 is a SBC based on AMD's 586-WB running at 133 MHZ. It comes with a builtin AMD 29F016 flash chip and a socketed EEPROM that is replacable by flash. Both units are mapped through a multiplexer - into a 32k memory window at 0xe8000. The control register for the + into a 32k memory window at 0xe8000. The control register for the multiplexing unit is located at IO 0x208 with a bit map of 0-5 Page Selection in 32k increments 6-7 Device selection: @@ -14,14 +14,14 @@ 01 SSD 0 (Socket) 10 SSD 1 (Flash chip) 11 undefined - + On each SSD, the first 128k is reserved for use by the bios - (actually it IS the bios..) This only matters if you are booting off the + (actually it IS the bios..) This only matters if you are booting off the flash, you must not put a file system starting there. - + The driver tries to do a detection algorithm to guess what sort of devices are plugged into the sockets. - + ##################################################################### */ #include <linux/module.h> @@ -31,6 +31,7 @@ #include <asm/io.h> #include <linux/mtd/map.h> +#include <linux/mtd/mtd.h> #define WINDOW_START 0xe8000 #define WINDOW_LENGTH 0x8000 @@ -40,7 +41,7 @@ static volatile char page_n_dev = 0; static unsigned long iomapadr; -static spinlock_t oct5066_spin = SPIN_LOCK_UNLOCKED; +static DEFINE_SPINLOCK(oct5066_spin); /* * We use map_priv_1 to identify which device we are. @@ -55,38 +56,18 @@ static void __oct5066_page(struct map_info *map, __u8 byte) static inline void oct5066_page(struct map_info *map, unsigned long ofs) { __u8 byte = map->map_priv_1 | (ofs >> WINDOW_SHIFT); - + if (page_n_dev != byte) __oct5066_page(map, byte); } -static __u8 oct5066_read8(struct map_info *map, unsigned long ofs) -{ - __u8 ret; - spin_lock(&oct5066_spin); - oct5066_page(map, ofs); - ret = readb(iomapadr + (ofs & WINDOW_MASK)); - spin_unlock(&oct5066_spin); - return ret; -} - -static __u16 oct5066_read16(struct map_info *map, unsigned long ofs) +static map_word oct5066_read8(struct map_info *map, unsigned long ofs) { - __u16 ret; + map_word ret; spin_lock(&oct5066_spin); oct5066_page(map, ofs); - ret = readw(iomapadr + (ofs & WINDOW_MASK)); - spin_unlock(&oct5066_spin); - return ret; -} - -static __u32 oct5066_read32(struct map_info *map, unsigned long ofs) -{ - __u32 ret; - spin_lock(&oct5066_spin); - oct5066_page(map, ofs); - ret = readl(iomapadr + (ofs & WINDOW_MASK)); + ret.x[0] = readb(iomapadr + (ofs & WINDOW_MASK)); spin_unlock(&oct5066_spin); return ret; } @@ -97,7 +78,7 @@ static void oct5066_copy_from(struct map_info *map, void *to, unsigned long from unsigned long thislen = len; if (len > (WINDOW_LENGTH - (from & WINDOW_MASK))) thislen = WINDOW_LENGTH-(from & WINDOW_MASK); - + spin_lock(&oct5066_spin); oct5066_page(map, from); memcpy_fromio(to, iomapadr + from, thislen); @@ -108,27 +89,11 @@ static void oct5066_copy_from(struct map_info *map, void *to, unsigned long from } } -static void oct5066_write8(struct map_info *map, __u8 d, unsigned long adr) -{ - spin_lock(&oct5066_spin); - oct5066_page(map, adr); - writeb(d, iomapadr + (adr & WINDOW_MASK)); - spin_unlock(&oct5066_spin); -} - -static void oct5066_write16(struct map_info *map, __u16 d, unsigned long adr) -{ - spin_lock(&oct5066_spin); - oct5066_page(map, adr); - writew(d, iomapadr + (adr & WINDOW_MASK)); - spin_unlock(&oct5066_spin); -} - -static void oct5066_write32(struct map_info *map, __u32 d, unsigned long adr) +static void oct5066_write8(struct map_info *map, map_word d, unsigned long adr) { spin_lock(&oct5066_spin); oct5066_page(map, adr); - writel(d, iomapadr + (adr & WINDOW_MASK)); + writeb(d.x[0], iomapadr + (adr & WINDOW_MASK)); spin_unlock(&oct5066_spin); } @@ -138,7 +103,7 @@ static void oct5066_copy_to(struct map_info *map, unsigned long to, const void * unsigned long thislen = len; if (len > (WINDOW_LENGTH - (to & WINDOW_MASK))) thislen = WINDOW_LENGTH-(to & WINDOW_MASK); - + spin_lock(&oct5066_spin); oct5066_page(map, to); memcpy_toio(iomapadr + to, from, thislen); @@ -151,32 +116,26 @@ static void oct5066_copy_to(struct map_info *map, unsigned long to, const void * static struct map_info oct5066_map[2] = { { - name: "Octagon 5066 Socket", - size: 512 * 1024, - buswidth: 1, - read8: oct5066_read8, - read16: oct5066_read16, - read32: oct5066_read32, - copy_from: oct5066_copy_from, - write8: oct5066_write8, - write16: oct5066_write16, - write32: oct5066_write32, - copy_to: oct5066_copy_to, - map_priv_1: 1<<6 + .name = "Octagon 5066 Socket", + .phys = NO_XIP, + .size = 512 * 1024, + .bankwidth = 1, + .read = oct5066_read8, + .copy_from = oct5066_copy_from, + .write = oct5066_write8, + .copy_to = oct5066_copy_to, + .map_priv_1 = 1<<6 }, { - name: "Octagon 5066 Internal Flash", - size: 2 * 1024 * 1024, - buswidth: 1, - read8: oct5066_read8, - read16: oct5066_read16, - read32: oct5066_read32, - copy_from: oct5066_copy_from, - write8: oct5066_write8, - write16: oct5066_write16, - write32: oct5066_write32, - copy_to: oct5066_copy_to, - map_priv_1: 2<<6 + .name = "Octagon 5066 Internal Flash", + .phys = NO_XIP, + .size = 2 * 1024 * 1024, + .bankwidth = 1, + .read = oct5066_read8, + .copy_from = oct5066_copy_from, + .write = oct5066_write8, + .copy_to = oct5066_copy_to, + .map_priv_1 = 2<<6 } }; @@ -185,7 +144,7 @@ static struct mtd_info *oct5066_mtd[2] = {NULL, NULL}; // OctProbe - Sense if this is an octagon card // --------------------------------------------------------------------- /* Perform a simple validity test, we map the window select SSD0 and - change pages while monitoring the window. A change in the window, + change pages while monitoring the window. A change in the window, controlled by the PAGE_IO port is a functioning 5066 board. This will fail if the thing in the socket is set to a uniform value. */ static int __init OctProbe(void) @@ -202,13 +161,13 @@ static int __init OctProbe(void) Values[I%10] = readl(iomapadr); if (I > 0 && Values[I%10] == Values[0]) return -EAGAIN; - } + } else { // Make sure we get the same values on the second pass if (Values[I%10] != readl(iomapadr)) return -EAGAIN; - } + } } return 0; } @@ -223,37 +182,36 @@ void cleanup_oct5066(void) } } iounmap((void *)iomapadr); - release_region(PAGE_IO,1); + release_region(PAGE_IO, 1); } int __init init_oct5066(void) { int i; - + int ret = 0; + // Do an autoprobe sequence - if (check_region(PAGE_IO,1) != 0) - { - printk("5066: Page Register in Use\n"); - return -EAGAIN; - } + if (!request_region(PAGE_IO,1,"Octagon SSD")) { + printk(KERN_NOTICE "5066: Page Register in Use\n"); + return -EAGAIN; + } iomapadr = (unsigned long)ioremap(WINDOW_START, WINDOW_LENGTH); if (!iomapadr) { - printk("Failed to ioremap memory region\n"); - return -EIO; + printk(KERN_NOTICE "Failed to ioremap memory region\n"); + ret = -EIO; + goto out_rel; } - if (OctProbe() != 0) - { - printk("5066: Octagon Probe Failed, is this an Octagon 5066 SBC?\n"); - iounmap((void *)iomapadr); - return -EAGAIN; - } - - request_region(PAGE_IO,1,"Octagon SSD"); - + if (OctProbe() != 0) { + printk(KERN_NOTICE "5066: Octagon Probe Failed, is this an Octagon 5066 SBC?\n"); + iounmap((void *)iomapadr); + ret = -EAGAIN; + goto out_unmap; + } + // Print out our little header.. printk("Octagon 5066 SSD IO:0x%x MEM:0x%x-0x%x\n",PAGE_IO,WINDOW_START, WINDOW_START+WINDOW_LENGTH); - + for (i=0; i<2; i++) { oct5066_mtd[i] = do_map_probe("cfi_probe", &oct5066_map[i]); if (!oct5066_mtd[i]) @@ -263,17 +221,23 @@ int __init init_oct5066(void) if (!oct5066_mtd[i]) oct5066_mtd[i] = do_map_probe("map_rom", &oct5066_map[i]); if (oct5066_mtd[i]) { - oct5066_mtd[i]->module = THIS_MODULE; + oct5066_mtd[i]->owner = THIS_MODULE; add_mtd_device(oct5066_mtd[i]); } } - + if (!oct5066_mtd[0] && !oct5066_mtd[1]) { cleanup_oct5066(); return -ENXIO; - } - + } + return 0; + + out_unmap: + iounmap((void *)iomapadr); + out_rel: + release_region(PAGE_IO, 1); + return ret; } module_init(init_oct5066); |