LXR linux/arch/arm/plat-mxc/audmux-v1.c

   1/*
   2 * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
   3 *
   4 * Initial development of this code was funded by
   5 * Phytec Messtechnik GmbH, http://www.phytec.de
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; either version 2 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 */
  17
  18#include <linux/module.h>
  19#include <linux/err.h>
  20#include <linux/io.h>
  21#include <linux/clk.h>
  22#include <mach/audmux.h>
  23#include <mach/hardware.h>
  24
  25static void __iomem *audmux_base;
  26
  27static unsigned char port_mapping[] = {
  28        0x0, 0x4, 0x8, 0x10, 0x14, 0x1c,
  29};
  30
  31int mxc_audmux_v1_configure_port(unsigned int port, unsigned int pcr)
  32{
  33        if (!audmux_base) {
  34                printk("%s: not configured\n", __func__);
  35                return -ENOSYS;
  36        }
  37
  38        if (port >= ARRAY_SIZE(port_mapping))
  39                return -EINVAL;
  40
  41        writel(pcr, audmux_base + port_mapping[port]);
  42
  43        return 0;
  44}
  45EXPORT_SYMBOL_GPL(mxc_audmux_v1_configure_port);
  46
  47static int mxc_audmux_v1_init(void)
  48{
  49#ifdef CONFIG_MACH_MX21
  50        if (cpu_is_mx21())
  51                audmux_base = MX21_IO_ADDRESS(MX21_AUDMUX_BASE_ADDR);
  52        else
  53#endif
  54#ifdef CONFIG_MACH_MX27
  55        if (cpu_is_mx27())
  56                audmux_base = MX27_IO_ADDRESS(MX27_AUDMUX_BASE_ADDR);
  57        else
  58#endif
  59                (void)0;
  60        
  61        return 0;
  62}
  63
  64postcore_initcall(mxc_audmux_v1_init);
  65