arch/arm/mach-pxa/h5400/h5400_audio.c

   1 /*
   2  * Hardware audio controls for HP iPAQ h5400
   3  *
   4  * Copyright © 2005 Erik Hovland <erik@hovland.org>
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file COPYING in the main directory of this archive for
   8  * more details.
   9  *
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/kernel.h>
  15 #include <linux/pm.h>
  16 #include <sound/ak4535.h>
  17 #include <linux/device.h>
  18 #include <asm/hardware.h>
  19 #include <asm/io.h>
  20 #include <asm/arch/ipaq.h>
  21 #include <asm/arch/h5400-asic.h>
  22 #include <linux/platform_device.h>
  23
  24 #include <asm/hardware/samcop_base.h>
  25
  26 /* It's up to the <machine>_audio drive to initialize
  27  * the ak4535_device_controls variable, as it's needed
  28  * to initialize the ak4535 module.
  29  */
  30
  31 ak4535_device_controls_t ak4535_device_controls;
  32
  33 static void h5400_codec_set_power (int mode)
  34 {
  35         samcop_set_gpio_b (&h5400_samcop.dev,
  36                            SAMCOP_GPIO_GPB_CODEC_POWER_ON,
  37                            mode);
  38 }
  39
  40 static void h5400_audio_set_power (int mode)
  41 {
  42         samcop_set_gpio_b (&h5400_samcop.dev,
  43                            SAMCOP_GPIO_GPB_AUDIO_POWER_ON,
  44                            mode);
  45 }
  46
  47 static void h5400_audio_set_mute (int mode)
  48 {
  49 }
  50
  51 static int __init h5400_audio_init(void)
  52 {
  53         ak4535_device_controls.set_codec_power = h5400_codec_set_power;
  54         ak4535_device_controls.set_audio_power = h5400_audio_set_power;
  55         ak4535_device_controls.set_audio_mute = h5400_audio_set_mute;
  56         return (0);
  57 }
  58
  59 static void __exit h5400_audio_exit(void)
  60 {
  61         ak4535_device_controls.set_codec_power = NULL;
  62         ak4535_device_controls.set_audio_power = NULL;
  63         ak4535_device_controls.set_audio_mute = NULL;
  64 }
  65
  66
  67 module_init(h5400_audio_init);
  68 module_exit(h5400_audio_exit);
  69
  70 EXPORT_SYMBOL(ak4535_device_controls);
  71 MODULE_AUTHOR("Erik Hovland <erik@hovland.org>");
  72 MODULE_DESCRIPTION("Hardware audio controls for HP iPAQ h5xxx");
  73 MODULE_LICENSE("GPL");