1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
4 */
5 /*
6 * driver for VIA VT1632 DVI Transmitter
7 */
8
9 #include <linux/slab.h>
10 #include "via_aux.h"
11
12
13 static const char *name = "VT1632 DVI Transmitter";
14
15
probe(struct via_aux_bus * bus,u8 addr)16 static 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[] = {0x06, 0x11, 0x92, 0x31}, 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
via_aux_vt1632_probe(struct via_aux_bus * bus)33 void via_aux_vt1632_probe(struct via_aux_bus *bus)
34 {
35 u8 i;
36
37 for (i = 0x08; i <= 0x0F; i++)
38 probe(bus, i);
39 }
40