patch-2.4.6 linux/drivers/mtd/octagon-5066.c

• Lines: 286
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.5/linux/drivers/mtd/octagon-5066.c
• Orig date: Fri Feb 16 16:02:36 2001

diff -u --recursive --new-file v2.4.5/linux/drivers/mtd/octagon-5066.c linux/drivers/mtd/octagon-5066.c
@@ -1,285 +0,0 @@
-// $Id: octagon-5066.c,v 1.12.2.1 2001/02/15 10:12:48 dwmw2 Exp $
-/* ######################################################################
-
-   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 
-   multiplexing unit is located at IO 0x208 with a bit map of
-     0-5 Page Selection in 32k increments
-     6-7 Device selection:
-        00 SSD off
-        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 
-   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>
-#include <linux/slab.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <asm/io.h>
-
-#include <linux/mtd/map.h>
-
-#define WINDOW_START 0xe8000
-#define WINDOW_LENGTH 0x8000
-#define WINDOW_SHIFT 27
-#define WINDOW_MASK 0x7FFF
-#define PAGE_IO 0x208
-
-static volatile char page_n_dev = 0;
-static unsigned long iomapadr;
-static spinlock_t oct5066_spin = SPIN_LOCK_UNLOCKED;
-
-/*
- * We use map_priv_1 to identify which device we are.
- */
-
-static void __oct5066_page(struct map_info *map, __u8 byte)
-{
-	outb(byte,PAGE_IO);
-	page_n_dev = 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)
-{
-	__u16 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));
-	spin_unlock(&oct5066_spin);
-	return ret;
-}
-
-static void oct5066_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
-{
-	while(len) {
-		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);
-		spin_unlock(&oct5066_spin);
-		to += thislen;
-		from += thislen;
-		len -= thislen;
-	}
-}
-
-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)
-{
-	spin_lock(&oct5066_spin);
-	oct5066_page(map, adr);
-	writel(d, iomapadr + (adr & WINDOW_MASK));
-	spin_unlock(&oct5066_spin);
-}
-
-static void oct5066_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
-{
-	while(len) {
-		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);
-		spin_unlock(&oct5066_spin);
-		to += thislen;
-		from += thislen;
-		len -= thislen;
-	}
-}
-
-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 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
-	}
-};
-
-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, 
-   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()
-{
-   unsigned int Base = (1 << 6);
-   unsigned long I;
-   unsigned long Values[10];
-   for (I = 0; I != 20; I++)
-   {
-      outb(Base + (I%10),PAGE_IO);
-      if (I < 10)
-      {
-	 // Record the value and check for uniqueness
-	 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;
-}
-
-#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
-#define init_oct5066 init_module
-#define cleanup_oct5066 cleanup_module
-#endif
-
-void cleanup_oct5066(void)
-{
-	int i;
-	for (i=0; i<2; i++) {
-		if (oct5066_mtd[i]) {
-			del_mtd_device(oct5066_mtd[i]);
-			map_destroy(oct5066_mtd[i]);
-		}
-	}
-	iounmap((void *)iomapadr);
-	release_region(PAGE_IO,1);
-}
-
-int __init init_oct5066(void)
-{
-	int i;
-	
-	// Do an autoprobe sequence
-	if (check_region(PAGE_IO,1) != 0)
-		{
-			printk("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;
-	}
-	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");
-	
-	// 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_cfi_probe(&oct5066_map[i]);
-		if (!oct5066_mtd[i])
-			oct5066_mtd[i] = do_jedec_probe(&oct5066_map[i]);
-		if (!oct5066_mtd[i])
-			oct5066_mtd[i] = do_ram_probe(&oct5066_map[i]);
-		if (!oct5066_mtd[i])
-			oct5066_mtd[i] = do_rom_probe(&oct5066_map[i]);
-		if (oct5066_mtd[i]) {
-			oct5066_mtd[i]->module = THIS_MODULE;
-			add_mtd_device(oct5066_mtd[i]);
-		}
-	}
-	
-	if (!oct5066_mtd[0] && !oct5066_mtd[1]) {
-		cleanup_oct5066();
-		return -ENXIO;
-	}	  
-	
-	return 0;
-}
-
-module_init(init_oct5066);
-module_exit(cleanup_oct5066);