Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/mtd/maps/elan-104nc.c b/drivers/mtd/maps/elan-104nc.c
new file mode 100644
index 0000000..e9465f5
--- /dev/null
+++ b/drivers/mtd/maps/elan-104nc.c
@@ -0,0 +1,228 @@
+/* elan-104nc.c -- MTD map driver for Arcom Control Systems ELAN-104NC
+
+ Copyright (C) 2000 Arcom Control System Ltd
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+
+ $Id: elan-104nc.c,v 1.25 2004/11/28 09:40:39 dwmw2 Exp $
+
+The ELAN-104NC has up to 8 Mibyte of Intel StrataFlash (28F320/28F640) in x16
+mode. This drivers uses the CFI probe and Intel Extended Command Set drivers.
+
+The flash is accessed as follows:
+
+ 32 kbyte memory window at 0xb0000-0xb7fff
+
+ 16 bit I/O port (0x22) for some sort of paging.
+
+The single flash device is divided into 3 partition which appear as separate
+MTD devices.
+
+Linux thinks that the I/O port is used by the PIC and hence check_region() will
+always fail. So we don't do it. I just hope it doesn't break anything.
+*/
+#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>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+
+#define WINDOW_START 0xb0000
+/* Number of bits in offset. */
+#define WINDOW_SHIFT 15
+#define WINDOW_LENGTH (1 << WINDOW_SHIFT)
+/* The bits for the offset into the window. */
+#define WINDOW_MASK (WINDOW_LENGTH-1)
+#define PAGE_IO 0x22
+#define PAGE_IO_SIZE 2
+
+static volatile int page_in_window = -1; // Current page in window.
+static void __iomem *iomapadr;
+static DEFINE_SPINLOCK(elan_104nc_spin);
+
+/* partition_info gives details on the logical partitions that the split the
+ * single flash device into. If the size if zero we use up to the end of the
+ * device. */
+static struct mtd_partition partition_info[]={
+ { .name = "ELAN-104NC flash boot partition",
+ .offset = 0,
+ .size = 640*1024 },
+ { .name = "ELAN-104NC flash partition 1",
+ .offset = 640*1024,
+ .size = 896*1024 },
+ { .name = "ELAN-104NC flash partition 2",
+ .offset = (640+896)*1024 }
+};
+#define NUM_PARTITIONS (sizeof(partition_info)/sizeof(partition_info[0]))
+
+/*
+ * If no idea what is going on here. This is taken from the FlashFX stuff.
+ */
+#define ROMCS 1
+
+static inline void elan_104nc_setup(void)
+{
+ u16 t;
+
+ outw( 0x0023 + ROMCS*2, PAGE_IO );
+ t=inb( PAGE_IO+1 );
+
+ t=(t & 0xf9) | 0x04;
+
+ outw( ((0x0023 + ROMCS*2) | (t << 8)), PAGE_IO );
+}
+
+static inline void elan_104nc_page(struct map_info *map, unsigned long ofs)
+{
+ unsigned long page = ofs >> WINDOW_SHIFT;
+
+ if( page!=page_in_window ) {
+ int cmd1;
+ int cmd2;
+
+ cmd1=(page & 0x700) + 0x0833 + ROMCS*0x4000;
+ cmd2=((page & 0xff) << 8) + 0x0032;
+
+ outw( cmd1, PAGE_IO );
+ outw( cmd2, PAGE_IO );
+
+ page_in_window = page;
+ }
+}
+
+
+static map_word elan_104nc_read16(struct map_info *map, unsigned long ofs)
+{
+ map_word ret;
+ spin_lock(&elan_104nc_spin);
+ elan_104nc_page(map, ofs);
+ ret.x[0] = readw(iomapadr + (ofs & WINDOW_MASK));
+ spin_unlock(&elan_104nc_spin);
+ return ret;
+}
+
+static void elan_104nc_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(&elan_104nc_spin);
+ elan_104nc_page(map, from);
+ memcpy_fromio(to, iomapadr + (from & WINDOW_MASK), thislen);
+ spin_unlock(&elan_104nc_spin);
+ to += thislen;
+ from += thislen;
+ len -= thislen;
+ }
+}
+
+static void elan_104nc_write16(struct map_info *map, map_word d, unsigned long adr)
+{
+ spin_lock(&elan_104nc_spin);
+ elan_104nc_page(map, adr);
+ writew(d.x[0], iomapadr + (adr & WINDOW_MASK));
+ spin_unlock(&elan_104nc_spin);
+}
+
+static void elan_104nc_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(&elan_104nc_spin);
+ elan_104nc_page(map, to);
+ memcpy_toio(iomapadr + (to & WINDOW_MASK), from, thislen);
+ spin_unlock(&elan_104nc_spin);
+ to += thislen;
+ from += thislen;
+ len -= thislen;
+ }
+}
+
+static struct map_info elan_104nc_map = {
+ .name = "ELAN-104NC flash",
+ .phys = NO_XIP,
+ .size = 8*1024*1024, /* this must be set to a maximum possible amount
+ of flash so the cfi probe routines find all
+ the chips */
+ .bankwidth = 2,
+ .read = elan_104nc_read16,
+ .copy_from = elan_104nc_copy_from,
+ .write = elan_104nc_write16,
+ .copy_to = elan_104nc_copy_to
+};
+
+/* MTD device for all of the flash. */
+static struct mtd_info *all_mtd;
+
+static void cleanup_elan_104nc(void)
+{
+ if( all_mtd ) {
+ del_mtd_partitions( all_mtd );
+ map_destroy( all_mtd );
+ }
+
+ iounmap(iomapadr);
+}
+
+static int __init init_elan_104nc(void)
+{
+ /* Urg! We use I/O port 0x22 without request_region()ing it,
+ because it's already allocated to the PIC. */
+
+ iomapadr = ioremap(WINDOW_START, WINDOW_LENGTH);
+ if (!iomapadr) {
+ printk( KERN_ERR"%s: failed to ioremap memory region\n",
+ elan_104nc_map.name );
+ return -EIO;
+ }
+
+ printk( KERN_INFO"%s: IO:0x%x-0x%x MEM:0x%x-0x%x\n",
+ elan_104nc_map.name,
+ PAGE_IO, PAGE_IO+PAGE_IO_SIZE-1,
+ WINDOW_START, WINDOW_START+WINDOW_LENGTH-1 );
+
+ elan_104nc_setup();
+
+ /* Probe for chip. */
+ all_mtd = do_map_probe("cfi_probe", &elan_104nc_map );
+ if( !all_mtd ) {
+ cleanup_elan_104nc();
+ return -ENXIO;
+ }
+
+ all_mtd->owner = THIS_MODULE;
+
+ /* Create MTD devices for each partition. */
+ add_mtd_partitions( all_mtd, partition_info, NUM_PARTITIONS );
+
+ return 0;
+}
+
+module_init(init_elan_104nc);
+module_exit(cleanup_elan_104nc);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Arcom Control Systems Ltd.");
+MODULE_DESCRIPTION("MTD map driver for Arcom Control Systems ELAN-104NC");