-// $Id: octagon-5066.c,v 1.26 2004/07/12 22:38:29 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:
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>
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);
}
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);
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);
// 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)
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;
}
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])
add_mtd_device(oct5066_mtd[i]);
}
}
-
+
if (!oct5066_mtd[0] && !oct5066_mtd[1]) {
cleanup_oct5066();
return -ENXIO;
- }
+ }
return 0;