[deliverable/linux.git] / arch / alpha / kernel / console.c

/*
 *	linux/arch/alpha/kernel/console.c
 *
 * Architecture-specific specific support for VGA device on 
 * non-0 I/O hose
 */

#include <linux/pci.h>
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/vt.h>
#include <asm/vga.h>
#include <asm/machvec.h>

#include "pci_impl.h"

#ifdef CONFIG_VGA_HOSE

struct pci_controller *pci_vga_hose;
static struct resource alpha_vga = {
	.name	= "alpha-vga+",
	.start	= 0x3C0,
	.end	= 0x3DF
};

static struct pci_controller * __init 
default_vga_hose_select(struct pci_controller *h1, struct pci_controller *h2)
{
	if (h2->index < h1->index)
		return h2;

	return h1;
}

void __init 
locate_and_init_vga(void *(*sel_func)(void *, void *))
{
	struct pci_controller *hose = NULL;
	struct pci_dev *dev = NULL;

	/* Default the select function */
	if (!sel_func) sel_func = (void *)default_vga_hose_select;

	/* Find the console VGA device */
	for(dev=NULL; (dev=pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, dev));) {
		if (!hose)
			hose = dev->sysdata;
		else
			hose = sel_func(hose, dev->sysdata);
	}

	/* Did we already initialize the correct one? Is there one? */
	if (!hose || (conswitchp == &vga_con && pci_vga_hose == hose))
		return;

	/* Create a new VGA ioport resource WRT the hose it is on. */
	alpha_vga.start += hose->io_space->start;
	alpha_vga.end += hose->io_space->start;
	request_resource(hose->io_space, &alpha_vga);

	/* Set the VGA hose and init the new console. */
	pci_vga_hose = hose;
	take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1);
}

void __init
find_console_vga_hose(void)
{
	u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset);

	if (pu64[7] == 3) {	/* TERM_TYPE == graphics */
		struct pci_controller *hose;
		int h = (pu64[30] >> 24) & 0xff;	/* console hose # */

		/*
		 * Our hose numbering DOES match the console's, so find
		 * the right one...
		 */
		for (hose = hose_head; hose; hose = hose->next) {
			if (hose->index == h) break;
		}

		if (hose) {
			printk("Console graphics on hose %d\n", h);
			pci_vga_hose = hose;
		}
	}
}

#endif
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"
025a2215 JE	17
1da177e4 LT	18	#ifdef CONFIG_VGA_HOSE
1da177e4 LT	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;
1da177e4 LT	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	}
1da177e4 LT	52
025a2215 JE	53	/* Did we already initialize the correct one? Is there one? */
025a2215 JE	54	if (!hose \|\| (conswitchp == &vga_con && pci_vga_hose == hose))
1da177e4 LT	55	return;
1da177e4 LT	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;
1da177e4 LT	64	take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1);
	65	}
	66
025a2215 JE	67	void __init
	68	find_console_vga_hose(void)
	69	{
	70	u64 pu64 = (u64 )((u64)hwrpb + hwrpb->ctbt_offset);
	71
	72	if (pu64[7] == 3) { /* TERM_TYPE == graphics */
	73	struct pci_controller *hose;
	74	int h = (pu64[30] >> 24) & 0xff; /* console hose # */
	75
	76	/*
	77	* Our hose numbering DOES match the console's, so find
	78	* the right one...
	79	*/
	80	for (hose = hose_head; hose; hose = hose->next) {
	81	if (hose->index == h) break;
	82	}
	83
	84	if (hose) {
	85	printk("Console graphics on hose %d\n", h);
	86	pci_vga_hose = hose;
	87	}
	88	}
	89	}
	90
1da177e4	91	#endif