1da177e4c3
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!
158 lines
3.6 KiB
C
158 lines
3.6 KiB
C
/*
|
|
* $Id: l440gx.c,v 1.17 2004/11/28 09:40:39 dwmw2 Exp $
|
|
*
|
|
* BIOS Flash chip on Intel 440GX board.
|
|
*
|
|
* Bugs this currently does not work under linuxBIOS.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <asm/io.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/map.h>
|
|
#include <linux/config.h>
|
|
|
|
#define PIIXE_IOBASE_RESOURCE 11
|
|
|
|
#define WINDOW_ADDR 0xfff00000
|
|
#define WINDOW_SIZE 0x00100000
|
|
#define BUSWIDTH 1
|
|
|
|
static u32 iobase;
|
|
#define IOBASE iobase
|
|
#define TRIBUF_PORT (IOBASE+0x37)
|
|
#define VPP_PORT (IOBASE+0x28)
|
|
|
|
static struct mtd_info *mymtd;
|
|
|
|
|
|
/* Is this really the vpp port? */
|
|
static void l440gx_set_vpp(struct map_info *map, int vpp)
|
|
{
|
|
unsigned long l;
|
|
|
|
l = inl(VPP_PORT);
|
|
if (vpp) {
|
|
l |= 1;
|
|
} else {
|
|
l &= ~1;
|
|
}
|
|
outl(l, VPP_PORT);
|
|
}
|
|
|
|
static struct map_info l440gx_map = {
|
|
.name = "L440GX BIOS",
|
|
.size = WINDOW_SIZE,
|
|
.bankwidth = BUSWIDTH,
|
|
.phys = WINDOW_ADDR,
|
|
#if 0
|
|
/* FIXME verify that this is the
|
|
* appripriate code for vpp enable/disable
|
|
*/
|
|
.set_vpp = l440gx_set_vpp
|
|
#endif
|
|
};
|
|
|
|
static int __init init_l440gx(void)
|
|
{
|
|
struct pci_dev *dev, *pm_dev;
|
|
struct resource *pm_iobase;
|
|
__u16 word;
|
|
|
|
dev = pci_find_device(PCI_VENDOR_ID_INTEL,
|
|
PCI_DEVICE_ID_INTEL_82371AB_0, NULL);
|
|
|
|
pm_dev = pci_find_device(PCI_VENDOR_ID_INTEL,
|
|
PCI_DEVICE_ID_INTEL_82371AB_3, NULL);
|
|
|
|
if (!dev || !pm_dev) {
|
|
printk(KERN_NOTICE "L440GX flash mapping: failed to find PIIX4 ISA bridge, cannot continue\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
l440gx_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE);
|
|
|
|
if (!l440gx_map.virt) {
|
|
printk(KERN_WARNING "Failed to ioremap L440GX flash region\n");
|
|
return -ENOMEM;
|
|
}
|
|
simple_map_init(&l440gx_map);
|
|
printk(KERN_NOTICE "window_addr = 0x%08lx\n", (unsigned long)l440gx_map.virt);
|
|
|
|
/* Setup the pm iobase resource
|
|
* This code should move into some kind of generic bridge
|
|
* driver but for the moment I'm content with getting the
|
|
* allocation correct.
|
|
*/
|
|
pm_iobase = &pm_dev->resource[PIIXE_IOBASE_RESOURCE];
|
|
if (!(pm_iobase->flags & IORESOURCE_IO)) {
|
|
pm_iobase->name = "pm iobase";
|
|
pm_iobase->start = 0;
|
|
pm_iobase->end = 63;
|
|
pm_iobase->flags = IORESOURCE_IO;
|
|
|
|
/* Put the current value in the resource */
|
|
pci_read_config_dword(pm_dev, 0x40, &iobase);
|
|
iobase &= ~1;
|
|
pm_iobase->start += iobase & ~1;
|
|
pm_iobase->end += iobase & ~1;
|
|
|
|
/* Allocate the resource region */
|
|
if (pci_assign_resource(pm_dev, PIIXE_IOBASE_RESOURCE) != 0) {
|
|
printk(KERN_WARNING "Could not allocate pm iobase resource\n");
|
|
iounmap(l440gx_map.virt);
|
|
return -ENXIO;
|
|
}
|
|
}
|
|
/* Set the iobase */
|
|
iobase = pm_iobase->start;
|
|
pci_write_config_dword(pm_dev, 0x40, iobase | 1);
|
|
|
|
|
|
/* Set XBCS# */
|
|
pci_read_config_word(dev, 0x4e, &word);
|
|
word |= 0x4;
|
|
pci_write_config_word(dev, 0x4e, word);
|
|
|
|
/* Supply write voltage to the chip */
|
|
l440gx_set_vpp(&l440gx_map, 1);
|
|
|
|
/* Enable the gate on the WE line */
|
|
outb(inb(TRIBUF_PORT) & ~1, TRIBUF_PORT);
|
|
|
|
printk(KERN_NOTICE "Enabled WE line to L440GX BIOS flash chip.\n");
|
|
|
|
mymtd = do_map_probe("jedec_probe", &l440gx_map);
|
|
if (!mymtd) {
|
|
printk(KERN_NOTICE "JEDEC probe on BIOS chip failed. Using ROM\n");
|
|
mymtd = do_map_probe("map_rom", &l440gx_map);
|
|
}
|
|
if (mymtd) {
|
|
mymtd->owner = THIS_MODULE;
|
|
|
|
add_mtd_device(mymtd);
|
|
return 0;
|
|
}
|
|
|
|
iounmap(l440gx_map.virt);
|
|
return -ENXIO;
|
|
}
|
|
|
|
static void __exit cleanup_l440gx(void)
|
|
{
|
|
del_mtd_device(mymtd);
|
|
map_destroy(mymtd);
|
|
|
|
iounmap(l440gx_map.virt);
|
|
}
|
|
|
|
module_init(init_l440gx);
|
|
module_exit(cleanup_l440gx);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
|
|
MODULE_DESCRIPTION("MTD map driver for BIOS chips on Intel L440GX motherboards");
|