Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 2 | * $Id: l440gx.c,v 1.18 2005/11/07 11:14:27 gleixner Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * BIOS Flash chip on Intel 440GX board. |
| 5 | * |
| 6 | * Bugs this currently does not work under linuxBIOS. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/pci.h> |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/init.h> |
| 13 | #include <asm/io.h> |
| 14 | #include <linux/mtd/mtd.h> |
| 15 | #include <linux/mtd/map.h> |
| 16 | #include <linux/config.h> |
| 17 | |
| 18 | #define PIIXE_IOBASE_RESOURCE 11 |
| 19 | |
| 20 | #define WINDOW_ADDR 0xfff00000 |
| 21 | #define WINDOW_SIZE 0x00100000 |
| 22 | #define BUSWIDTH 1 |
| 23 | |
| 24 | static u32 iobase; |
| 25 | #define IOBASE iobase |
| 26 | #define TRIBUF_PORT (IOBASE+0x37) |
| 27 | #define VPP_PORT (IOBASE+0x28) |
| 28 | |
| 29 | static struct mtd_info *mymtd; |
| 30 | |
| 31 | |
| 32 | /* Is this really the vpp port? */ |
| 33 | static void l440gx_set_vpp(struct map_info *map, int vpp) |
| 34 | { |
| 35 | unsigned long l; |
| 36 | |
| 37 | l = inl(VPP_PORT); |
| 38 | if (vpp) { |
| 39 | l |= 1; |
| 40 | } else { |
| 41 | l &= ~1; |
| 42 | } |
| 43 | outl(l, VPP_PORT); |
| 44 | } |
| 45 | |
| 46 | static struct map_info l440gx_map = { |
| 47 | .name = "L440GX BIOS", |
| 48 | .size = WINDOW_SIZE, |
| 49 | .bankwidth = BUSWIDTH, |
| 50 | .phys = WINDOW_ADDR, |
| 51 | #if 0 |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 52 | /* FIXME verify that this is the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | * appripriate code for vpp enable/disable |
| 54 | */ |
| 55 | .set_vpp = l440gx_set_vpp |
| 56 | #endif |
| 57 | }; |
| 58 | |
| 59 | static int __init init_l440gx(void) |
| 60 | { |
| 61 | struct pci_dev *dev, *pm_dev; |
| 62 | struct resource *pm_iobase; |
| 63 | __u16 word; |
| 64 | |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 65 | dev = pci_find_device(PCI_VENDOR_ID_INTEL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | PCI_DEVICE_ID_INTEL_82371AB_0, NULL); |
| 67 | |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 68 | pm_dev = pci_find_device(PCI_VENDOR_ID_INTEL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | PCI_DEVICE_ID_INTEL_82371AB_3, NULL); |
| 70 | |
| 71 | if (!dev || !pm_dev) { |
| 72 | printk(KERN_NOTICE "L440GX flash mapping: failed to find PIIX4 ISA bridge, cannot continue\n"); |
| 73 | return -ENODEV; |
| 74 | } |
| 75 | |
| 76 | l440gx_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE); |
| 77 | |
| 78 | if (!l440gx_map.virt) { |
| 79 | printk(KERN_WARNING "Failed to ioremap L440GX flash region\n"); |
| 80 | return -ENOMEM; |
| 81 | } |
| 82 | simple_map_init(&l440gx_map); |
| 83 | printk(KERN_NOTICE "window_addr = 0x%08lx\n", (unsigned long)l440gx_map.virt); |
| 84 | |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 85 | /* Setup the pm iobase resource |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | * This code should move into some kind of generic bridge |
| 87 | * driver but for the moment I'm content with getting the |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 88 | * allocation correct. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | */ |
| 90 | pm_iobase = &pm_dev->resource[PIIXE_IOBASE_RESOURCE]; |
| 91 | if (!(pm_iobase->flags & IORESOURCE_IO)) { |
| 92 | pm_iobase->name = "pm iobase"; |
| 93 | pm_iobase->start = 0; |
| 94 | pm_iobase->end = 63; |
| 95 | pm_iobase->flags = IORESOURCE_IO; |
| 96 | |
| 97 | /* Put the current value in the resource */ |
| 98 | pci_read_config_dword(pm_dev, 0x40, &iobase); |
| 99 | iobase &= ~1; |
| 100 | pm_iobase->start += iobase & ~1; |
| 101 | pm_iobase->end += iobase & ~1; |
| 102 | |
| 103 | /* Allocate the resource region */ |
| 104 | if (pci_assign_resource(pm_dev, PIIXE_IOBASE_RESOURCE) != 0) { |
| 105 | printk(KERN_WARNING "Could not allocate pm iobase resource\n"); |
| 106 | iounmap(l440gx_map.virt); |
| 107 | return -ENXIO; |
| 108 | } |
| 109 | } |
| 110 | /* Set the iobase */ |
| 111 | iobase = pm_iobase->start; |
| 112 | pci_write_config_dword(pm_dev, 0x40, iobase | 1); |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
| 115 | /* Set XBCS# */ |
| 116 | pci_read_config_word(dev, 0x4e, &word); |
| 117 | word |= 0x4; |
| 118 | pci_write_config_word(dev, 0x4e, word); |
| 119 | |
| 120 | /* Supply write voltage to the chip */ |
| 121 | l440gx_set_vpp(&l440gx_map, 1); |
| 122 | |
| 123 | /* Enable the gate on the WE line */ |
| 124 | outb(inb(TRIBUF_PORT) & ~1, TRIBUF_PORT); |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | printk(KERN_NOTICE "Enabled WE line to L440GX BIOS flash chip.\n"); |
| 127 | |
| 128 | mymtd = do_map_probe("jedec_probe", &l440gx_map); |
| 129 | if (!mymtd) { |
| 130 | printk(KERN_NOTICE "JEDEC probe on BIOS chip failed. Using ROM\n"); |
| 131 | mymtd = do_map_probe("map_rom", &l440gx_map); |
| 132 | } |
| 133 | if (mymtd) { |
| 134 | mymtd->owner = THIS_MODULE; |
| 135 | |
| 136 | add_mtd_device(mymtd); |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | iounmap(l440gx_map.virt); |
| 141 | return -ENXIO; |
| 142 | } |
| 143 | |
| 144 | static void __exit cleanup_l440gx(void) |
| 145 | { |
| 146 | del_mtd_device(mymtd); |
| 147 | map_destroy(mymtd); |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | iounmap(l440gx_map.virt); |
| 150 | } |
| 151 | |
| 152 | module_init(init_l440gx); |
| 153 | module_exit(cleanup_l440gx); |
| 154 | |
| 155 | MODULE_LICENSE("GPL"); |
| 156 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); |
| 157 | MODULE_DESCRIPTION("MTD map driver for BIOS chips on Intel L440GX motherboards"); |