LXR linux/drivers/video/fbdev/via/via_aux

   1/*
   2 * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of the GNU General Public
   6 * License as published by the Free Software Foundation;
   7 * either version 2, or (at your option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
  11 * the implied warranty of MERCHANTABILITY or FITNESS FOR
  12 * A PARTICULAR PURPOSE.See the GNU General Public License
  13 * for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc.,
  18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19 */
  20/*
  21 * driver for VIA VT1632 DVI Transmitter
  22 */
  23
  24#include <linux/slab.h>
  25#include "via_aux.h"
  26
  27
  28static const char *name = "VT1632 DVI Transmitter";
  29
  30
  31static void probe(struct via_aux_bus *bus, u8 addr)
  32{
  33        struct via_aux_drv drv = {
  34                .bus    =       bus,
  35                .addr   =       addr,
  36                .name   =       name};
  37        /* check vendor id and device id */
  38        const u8 id[] = {0x06, 0x11, 0x92, 0x31}, len = ARRAY_SIZE(id);
  39        u8 tmp[len];
  40
  41        if (!via_aux_read(&drv, 0x00, tmp, len) || memcmp(id, tmp, len))
  42                return;
  43
  44        printk(KERN_INFO "viafb: Found %s at address 0x%x\n", name, addr);
  45        via_aux_add(&drv);
  46}
  47
  48void via_aux_vt1632_probe(struct via_aux_bus *bus)
  49{
  50        u8 i;
  51
  52        for (i = 0x08; i <= 0x0F; i++)
  53                probe(bus, i);
  54}
  55