blob: 8e9a41966881bfa82b704a6f1826c1faabf3ff02 [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001// SPDX-License-Identifier: GPL-2.0
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
3 * linux/arch/alpha/kernel/console.c
4 *
5 * Architecture-specific specific support for VGA device on
6 * non-0 I/O hose
7 */
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/pci.h>
10#include <linux/init.h>
11#include <linux/tty.h>
12#include <linux/console.h>
Jay Estabrook025a2212007-06-01 00:47:03 -070013#include <linux/vt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <asm/vga.h>
15#include <asm/machvec.h>
16
Jay Estabrook025a2212007-06-01 00:47:03 -070017#include "pci_impl.h"
18
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#ifdef CONFIG_VGA_HOSE
20
Jay Estabrook025a2212007-06-01 00:47:03 -070021struct pci_controller *pci_vga_hose;
22static struct resource alpha_vga = {
23 .name = "alpha-vga+",
24 .start = 0x3C0,
25 .end = 0x3DF
26};
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
28static struct pci_controller * __init
29default_vga_hose_select(struct pci_controller *h1, struct pci_controller *h2)
30{
31 if (h2->index < h1->index)
32 return h2;
33
34 return h1;
35}
36
37void __init
Linus Torvalds1da177e2005-04-16 15:20:36 -070038locate_and_init_vga(void *(*sel_func)(void *, void *))
39{
40 struct pci_controller *hose = NULL;
41 struct pci_dev *dev = NULL;
42
Jay Estabrook025a2212007-06-01 00:47:03 -070043 /* Default the select function */
Linus Torvalds1da177e2005-04-16 15:20:36 -070044 if (!sel_func) sel_func = (void *)default_vga_hose_select;
45
Jay Estabrook025a2212007-06-01 00:47:03 -070046 /* Find the console VGA device */
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 for(dev=NULL; (dev=pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, dev));) {
Jay Estabrook025a2212007-06-01 00:47:03 -070048 if (!hose)
49 hose = dev->sysdata;
50 else
51 hose = sel_func(hose, dev->sysdata);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 }
53
Jay Estabrook025a2212007-06-01 00:47:03 -070054 /* Did we already initialize the correct one? Is there one? */
55 if (!hose || (conswitchp == &vga_con && pci_vga_hose == hose))
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 return;
57
Jay Estabrook025a2212007-06-01 00:47:03 -070058 /* Create a new VGA ioport resource WRT the hose it is on. */
59 alpha_vga.start += hose->io_space->start;
60 alpha_vga.end += hose->io_space->start;
61 request_resource(hose->io_space, &alpha_vga);
62
63 /* Set the VGA hose and init the new console. */
64 pci_vga_hose = hose;
Wang YanQing155957f2013-05-21 13:15:12 +080065 console_lock();
66 do_take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1);
67 console_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -070068}
69
Jay Estabrook025a2212007-06-01 00:47:03 -070070void __init
71find_console_vga_hose(void)
72{
73 u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset);
74
75 if (pu64[7] == 3) { /* TERM_TYPE == graphics */
76 struct pci_controller *hose;
77 int h = (pu64[30] >> 24) & 0xff; /* console hose # */
78
79 /*
80 * Our hose numbering DOES match the console's, so find
81 * the right one...
82 */
83 for (hose = hose_head; hose; hose = hose->next) {
84 if (hose->index == h) break;
85 }
86
87 if (hose) {
88 printk("Console graphics on hose %d\n", h);
89 pci_vga_hose = hose;
90 }
91 }
92}
93
Linus Torvalds1da177e2005-04-16 15:20:36 -070094#endif