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
8#include <linux/pci.h>
9#include <linux/init.h>
10#include <linux/tty.h>
11#include <linux/console.h>
12#include <linux/vt.h>
13#include <asm/vga.h>
14#include <asm/machvec.h>
15
16#include "pci_impl.h"
17
18#ifdef CONFIG_VGA_HOSE
19
20struct pci_controller *pci_vga_hose;
21static struct resource alpha_vga = {
22	.name	= "alpha-vga+",
23	.start	= 0x3C0,
24	.end	= 0x3DF
25};
26
27static struct pci_controller * __init
28default_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
36void __init
37locate_and_init_vga(void *(*sel_func)(void *, void *))
38{
39	struct pci_controller *hose = NULL;
40	struct pci_dev *dev = NULL;
41
42	/* Default the select function */
43	if (!sel_func) sel_func = (void *)default_vga_hose_select;
44
45	/* Find the console VGA device */
46	for(dev=NULL; (dev=pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, dev));) {
47		if (!hose)
48			hose = dev->sysdata;
49		else
50			hose = sel_func(hose, dev->sysdata);
51	}
52
53	/* Did we already initialize the correct one? Is there one? */
54	if (!hose || (conswitchp == &vga_con && pci_vga_hose == hose))
55		return;
56
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;
64	console_lock();
65	do_take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1);
66	console_unlock();
67}
68
69void __init
70find_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
93#endif
94