via_aux_sii164.c

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
 4 */
 5/*
 6 * driver for Silicon Image SiI 164 PanelLink Transmitter
 7 */
 8
 9#include <linux/slab.h>
10#include "via_aux.h"
11
12
13static const char *name = "SiI 164 PanelLink Transmitter";
14
15
16static void probe(struct via_aux_bus *bus, u8 addr)
17{
18	struct via_aux_drv drv = {
19		.bus	=	bus,
20		.addr	=	addr,
21		.name	=	name};
22	/* check vendor id and device id */
23	const u8 id[] = {0x01, 0x00, 0x06, 0x00}, len = ARRAY_SIZE(id);
24	u8 tmp[ARRAY_SIZE(id)];
25
26	if (!via_aux_read(&drv, 0x00, tmp, len) || memcmp(id, tmp, len))
27		return;
28
29	printk(KERN_INFO "viafb: Found %s at address 0x%x\n", name, addr);
30	via_aux_add(&drv);
31}
32
33void via_aux_sii164_probe(struct via_aux_bus *bus)
34{
35	u8 i;
36
37	for (i = 0x38; i <= 0x3F; i++)
38		probe(bus, i);
39}