59018b6d2a
Once upon a time, the MTD repository was using CVS. This patch therefore removes all usages of the no longer updated CVS keywords from the MTD code. This also includes code that printed them to the user. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
237 lines
6.2 KiB
C
237 lines
6.2 KiB
C
/* sbc_gxx.c -- MTD map driver for Arcom Control Systems SBC-MediaGX,
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SBC-GXm and SBC-GX1 series boards.
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Copyright (C) 2001 Arcom Control System Ltd
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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The SBC-MediaGX / SBC-GXx has up to 16 MiB of
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Intel StrataFlash (28F320/28F640) in x8 mode.
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This driver uses the CFI probe and Intel Extended Command Set drivers.
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The flash is accessed as follows:
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16 KiB memory window at 0xdc000-0xdffff
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Two IO address locations for paging
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0x258
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bit 0-7: address bit 14-21
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0x259
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bit 0-1: address bit 22-23
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bit 7: 0 - reset/powered down
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1 - device enabled
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The single flash device is divided into 3 partition which appear as
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separate MTD devices.
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25/04/2001 AJL (Arcom) Modified signon strings and partition sizes
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(to support bzImages up to 638KiB-ish)
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*/
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// Includes
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <asm/io.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/partitions.h>
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// Defines
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// - Hardware specific
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#define WINDOW_START 0xdc000
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/* Number of bits in offset. */
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#define WINDOW_SHIFT 14
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#define WINDOW_LENGTH (1 << WINDOW_SHIFT)
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/* The bits for the offset into the window. */
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#define WINDOW_MASK (WINDOW_LENGTH-1)
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#define PAGE_IO 0x258
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#define PAGE_IO_SIZE 2
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/* bit 7 of 0x259 must be 1 to enable device. */
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#define DEVICE_ENABLE 0x8000
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// - Flash / Partition sizing
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#define MAX_SIZE_KiB 16384
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#define BOOT_PARTITION_SIZE_KiB 768
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#define DATA_PARTITION_SIZE_KiB 1280
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#define APP_PARTITION_SIZE_KiB 6144
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// Globals
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static volatile int page_in_window = -1; // Current page in window.
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static void __iomem *iomapadr;
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static DEFINE_SPINLOCK(sbc_gxx_spin);
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/* partition_info gives details on the logical partitions that the split the
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* single flash device into. If the size if zero we use up to the end of the
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* device. */
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static struct mtd_partition partition_info[]={
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{ .name = "SBC-GXx flash boot partition",
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.offset = 0,
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.size = BOOT_PARTITION_SIZE_KiB*1024 },
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{ .name = "SBC-GXx flash data partition",
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.offset = BOOT_PARTITION_SIZE_KiB*1024,
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.size = (DATA_PARTITION_SIZE_KiB)*1024 },
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{ .name = "SBC-GXx flash application partition",
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.offset = (BOOT_PARTITION_SIZE_KiB+DATA_PARTITION_SIZE_KiB)*1024 }
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};
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#define NUM_PARTITIONS 3
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static inline void sbc_gxx_page(struct map_info *map, unsigned long ofs)
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{
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unsigned long page = ofs >> WINDOW_SHIFT;
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if( page!=page_in_window ) {
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outw( page | DEVICE_ENABLE, PAGE_IO );
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page_in_window = page;
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}
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}
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static map_word sbc_gxx_read8(struct map_info *map, unsigned long ofs)
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{
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map_word ret;
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spin_lock(&sbc_gxx_spin);
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sbc_gxx_page(map, ofs);
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ret.x[0] = readb(iomapadr + (ofs & WINDOW_MASK));
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spin_unlock(&sbc_gxx_spin);
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return ret;
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}
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static void sbc_gxx_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
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{
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while(len) {
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unsigned long thislen = len;
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if (len > (WINDOW_LENGTH - (from & WINDOW_MASK)))
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thislen = WINDOW_LENGTH-(from & WINDOW_MASK);
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spin_lock(&sbc_gxx_spin);
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sbc_gxx_page(map, from);
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memcpy_fromio(to, iomapadr + (from & WINDOW_MASK), thislen);
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spin_unlock(&sbc_gxx_spin);
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to += thislen;
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from += thislen;
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len -= thislen;
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}
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}
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static void sbc_gxx_write8(struct map_info *map, map_word d, unsigned long adr)
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{
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spin_lock(&sbc_gxx_spin);
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sbc_gxx_page(map, adr);
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writeb(d.x[0], iomapadr + (adr & WINDOW_MASK));
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spin_unlock(&sbc_gxx_spin);
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}
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static void sbc_gxx_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
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{
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while(len) {
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unsigned long thislen = len;
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if (len > (WINDOW_LENGTH - (to & WINDOW_MASK)))
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thislen = WINDOW_LENGTH-(to & WINDOW_MASK);
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spin_lock(&sbc_gxx_spin);
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sbc_gxx_page(map, to);
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memcpy_toio(iomapadr + (to & WINDOW_MASK), from, thislen);
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spin_unlock(&sbc_gxx_spin);
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to += thislen;
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from += thislen;
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len -= thislen;
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}
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}
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static struct map_info sbc_gxx_map = {
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.name = "SBC-GXx flash",
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.phys = NO_XIP,
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.size = MAX_SIZE_KiB*1024, /* this must be set to a maximum possible amount
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of flash so the cfi probe routines find all
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the chips */
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.bankwidth = 1,
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.read = sbc_gxx_read8,
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.copy_from = sbc_gxx_copy_from,
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.write = sbc_gxx_write8,
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.copy_to = sbc_gxx_copy_to
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};
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/* MTD device for all of the flash. */
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static struct mtd_info *all_mtd;
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static void cleanup_sbc_gxx(void)
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{
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if( all_mtd ) {
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del_mtd_partitions( all_mtd );
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map_destroy( all_mtd );
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}
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iounmap(iomapadr);
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release_region(PAGE_IO,PAGE_IO_SIZE);
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}
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static int __init init_sbc_gxx(void)
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{
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iomapadr = ioremap(WINDOW_START, WINDOW_LENGTH);
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if (!iomapadr) {
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printk( KERN_ERR"%s: failed to ioremap memory region\n",
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sbc_gxx_map.name );
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return -EIO;
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}
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if (!request_region( PAGE_IO, PAGE_IO_SIZE, "SBC-GXx flash")) {
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printk( KERN_ERR"%s: IO ports 0x%x-0x%x in use\n",
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sbc_gxx_map.name,
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PAGE_IO, PAGE_IO+PAGE_IO_SIZE-1 );
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iounmap(iomapadr);
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return -EAGAIN;
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}
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printk( KERN_INFO"%s: IO:0x%x-0x%x MEM:0x%x-0x%x\n",
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sbc_gxx_map.name,
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PAGE_IO, PAGE_IO+PAGE_IO_SIZE-1,
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WINDOW_START, WINDOW_START+WINDOW_LENGTH-1 );
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/* Probe for chip. */
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all_mtd = do_map_probe( "cfi_probe", &sbc_gxx_map );
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if( !all_mtd ) {
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cleanup_sbc_gxx();
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return -ENXIO;
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}
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all_mtd->owner = THIS_MODULE;
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/* Create MTD devices for each partition. */
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add_mtd_partitions(all_mtd, partition_info, NUM_PARTITIONS );
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return 0;
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}
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module_init(init_sbc_gxx);
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module_exit(cleanup_sbc_gxx);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Arcom Control Systems Ltd.");
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MODULE_DESCRIPTION("MTD map driver for SBC-GXm and SBC-GX1 series boards");
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