1 files changed, 157 insertions, 0 deletions

diff --git a/drivers/mtd/maps/l440gx.c b/drivers/mtd/maps/l440gx.c
new file mode 100644
index 000000000000..b08668212ab7
--- /dev/null
+++ b/drivers/mtd/maps/l440gx.c
@@ -0,0 +1,157 @@
+/*
+ * $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");