FRV: Use generic show_interrupts()
[cris-mirror.git] / drivers / mtd / maps / l440gx.c
blob9e054503c4cf2920e23c7fded7d2bd39741c4166
1 /*
2 * BIOS Flash chip on Intel 440GX board.
4 * Bugs this currently does not work under linuxBIOS.
5 */
7 #include <linux/module.h>
8 #include <linux/pci.h>
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <asm/io.h>
12 #include <linux/mtd/mtd.h>
13 #include <linux/mtd/map.h>
15 #define PIIXE_IOBASE_RESOURCE 11
17 #define WINDOW_ADDR 0xfff00000
18 #define WINDOW_SIZE 0x00100000
19 #define BUSWIDTH 1
21 static u32 iobase;
22 #define IOBASE iobase
23 #define TRIBUF_PORT (IOBASE+0x37)
24 #define VPP_PORT (IOBASE+0x28)
26 static struct mtd_info *mymtd;
29 /* Is this really the vpp port? */
30 static void l440gx_set_vpp(struct map_info *map, int vpp)
32 unsigned long l;
34 l = inl(VPP_PORT);
35 if (vpp) {
36 l |= 1;
37 } else {
38 l &= ~1;
40 outl(l, VPP_PORT);
43 static struct map_info l440gx_map = {
44 .name = "L440GX BIOS",
45 .size = WINDOW_SIZE,
46 .bankwidth = BUSWIDTH,
47 .phys = WINDOW_ADDR,
48 #if 0
49 /* FIXME verify that this is the
50 * appripriate code for vpp enable/disable
52 .set_vpp = l440gx_set_vpp
53 #endif
56 static int __init init_l440gx(void)
58 struct pci_dev *dev, *pm_dev;
59 struct resource *pm_iobase;
60 __u16 word;
62 dev = pci_get_device(PCI_VENDOR_ID_INTEL,
63 PCI_DEVICE_ID_INTEL_82371AB_0, NULL);
65 pm_dev = pci_get_device(PCI_VENDOR_ID_INTEL,
66 PCI_DEVICE_ID_INTEL_82371AB_3, NULL);
68 pci_dev_put(dev);
70 if (!dev || !pm_dev) {
71 printk(KERN_NOTICE "L440GX flash mapping: failed to find PIIX4 ISA bridge, cannot continue\n");
72 pci_dev_put(pm_dev);
73 return -ENODEV;
76 l440gx_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE);
78 if (!l440gx_map.virt) {
79 printk(KERN_WARNING "Failed to ioremap L440GX flash region\n");
80 pci_dev_put(pm_dev);
81 return -ENOMEM;
83 simple_map_init(&l440gx_map);
84 printk(KERN_NOTICE "window_addr = 0x%08lx\n", (unsigned long)l440gx_map.virt);
86 /* Setup the pm iobase resource
87 * This code should move into some kind of generic bridge
88 * driver but for the moment I'm content with getting the
89 * allocation correct.
91 pm_iobase = &pm_dev->resource[PIIXE_IOBASE_RESOURCE];
92 if (!(pm_iobase->flags & IORESOURCE_IO)) {
93 pm_iobase->name = "pm iobase";
94 pm_iobase->start = 0;
95 pm_iobase->end = 63;
96 pm_iobase->flags = IORESOURCE_IO;
98 /* Put the current value in the resource */
99 pci_read_config_dword(pm_dev, 0x40, &iobase);
100 iobase &= ~1;
101 pm_iobase->start += iobase & ~1;
102 pm_iobase->end += iobase & ~1;
104 pci_dev_put(pm_dev);
106 /* Allocate the resource region */
107 if (pci_assign_resource(pm_dev, PIIXE_IOBASE_RESOURCE) != 0) {
108 pci_dev_put(dev);
109 pci_dev_put(pm_dev);
110 printk(KERN_WARNING "Could not allocate pm iobase resource\n");
111 iounmap(l440gx_map.virt);
112 return -ENXIO;
115 /* Set the iobase */
116 iobase = pm_iobase->start;
117 pci_write_config_dword(pm_dev, 0x40, iobase | 1);
120 /* Set XBCS# */
121 pci_read_config_word(dev, 0x4e, &word);
122 word |= 0x4;
123 pci_write_config_word(dev, 0x4e, word);
125 /* Supply write voltage to the chip */
126 l440gx_set_vpp(&l440gx_map, 1);
128 /* Enable the gate on the WE line */
129 outb(inb(TRIBUF_PORT) & ~1, TRIBUF_PORT);
131 printk(KERN_NOTICE "Enabled WE line to L440GX BIOS flash chip.\n");
133 mymtd = do_map_probe("jedec_probe", &l440gx_map);
134 if (!mymtd) {
135 printk(KERN_NOTICE "JEDEC probe on BIOS chip failed. Using ROM\n");
136 mymtd = do_map_probe("map_rom", &l440gx_map);
138 if (mymtd) {
139 mymtd->owner = THIS_MODULE;
141 add_mtd_device(mymtd);
142 return 0;
145 iounmap(l440gx_map.virt);
146 return -ENXIO;
149 static void __exit cleanup_l440gx(void)
151 del_mtd_device(mymtd);
152 map_destroy(mymtd);
154 iounmap(l440gx_map.virt);
157 module_init(init_l440gx);
158 module_exit(cleanup_l440gx);
160 MODULE_LICENSE("GPL");
161 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
162 MODULE_DESCRIPTION("MTD map driver for BIOS chips on Intel L440GX motherboards");