Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/arch/alpha/kernel/console.c | |
3 | * | |
4 | * Architecture-specific specific support for VGA device on | |
5 | * non-0 I/O hose | |
6 | */ | |
7 | ||
1da177e4 LT |
8 | #include <linux/pci.h> |
9 | #include <linux/init.h> | |
10 | #include <linux/tty.h> | |
11 | #include <linux/console.h> | |
025a2215 | 12 | #include <linux/vt.h> |
1da177e4 LT |
13 | #include <asm/vga.h> |
14 | #include <asm/machvec.h> | |
15 | ||
025a2215 JE |
16 | #include "pci_impl.h" |
17 | ||
1da177e4 LT |
18 | #ifdef CONFIG_VGA_HOSE |
19 | ||
025a2215 JE |
20 | struct pci_controller *pci_vga_hose; |
21 | static struct resource alpha_vga = { | |
22 | .name = "alpha-vga+", | |
23 | .start = 0x3C0, | |
24 | .end = 0x3DF | |
25 | }; | |
1da177e4 LT |
26 | |
27 | static struct pci_controller * __init | |
28 | default_vga_hose_select(struct pci_controller *h1, struct pci_controller *h2) | |
29 | { | |
30 | if (h2->index < h1->index) | |
31 | return h2; | |
32 | ||
33 | return h1; | |
34 | } | |
35 | ||
1da177e4 LT |
36 | void __init |
37 | locate_and_init_vga(void *(*sel_func)(void *, void *)) | |
38 | { | |
39 | struct pci_controller *hose = NULL; | |
40 | struct pci_dev *dev = NULL; | |
41 | ||
025a2215 | 42 | /* Default the select function */ |
1da177e4 LT |
43 | if (!sel_func) sel_func = (void *)default_vga_hose_select; |
44 | ||
025a2215 | 45 | /* Find the console VGA device */ |
1da177e4 | 46 | for(dev=NULL; (dev=pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, dev));) { |
025a2215 JE |
47 | if (!hose) |
48 | hose = dev->sysdata; | |
49 | else | |
50 | hose = sel_func(hose, dev->sysdata); | |
1da177e4 LT |
51 | } |
52 | ||
025a2215 JE |
53 | /* Did we already initialize the correct one? Is there one? */ |
54 | if (!hose || (conswitchp == &vga_con && pci_vga_hose == hose)) | |
1da177e4 LT |
55 | return; |
56 | ||
025a2215 JE |
57 | /* Create a new VGA ioport resource WRT the hose it is on. */ |
58 | alpha_vga.start += hose->io_space->start; | |
59 | alpha_vga.end += hose->io_space->start; | |
60 | request_resource(hose->io_space, &alpha_vga); | |
61 | ||
62 | /* Set the VGA hose and init the new console. */ | |
63 | pci_vga_hose = hose; | |
155957f5 WY |
64 | console_lock(); |
65 | do_take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1); | |
66 | console_unlock(); | |
1da177e4 LT |
67 | } |
68 | ||
025a2215 JE |
69 | void __init |
70 | find_console_vga_hose(void) | |
71 | { | |
72 | u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset); | |
73 | ||
74 | if (pu64[7] == 3) { /* TERM_TYPE == graphics */ | |
75 | struct pci_controller *hose; | |
76 | int h = (pu64[30] >> 24) & 0xff; /* console hose # */ | |
77 | ||
78 | /* | |
79 | * Our hose numbering DOES match the console's, so find | |
80 | * the right one... | |
81 | */ | |
82 | for (hose = hose_head; hose; hose = hose->next) { | |
83 | if (hose->index == h) break; | |
84 | } | |
85 | ||
86 | if (hose) { | |
87 | printk("Console graphics on hose %d\n", h); | |
88 | pci_vga_hose = hose; | |
89 | } | |
90 | } | |
91 | } | |
92 | ||
1da177e4 | 93 | #endif |