112 lines
2.8 KiB
C
112 lines
2.8 KiB
C
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/*
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* STMicrolectronics STx7108 SoC audio glue driver
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*
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* Copyright (c) 2010-2011 STMicroelectronics Limited
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*
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* Author: Pawel Moll <pawel.moll@st.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <asm/irq-ilc.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/stm/sysconf.h>
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#include <linux/stm/stx7108.h>
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#include <sound/core.h>
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#include "common.h"
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static int snd_stm_debug_level;
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module_param_named(debug, snd_stm_debug_level, int, S_IRUGO | S_IWUSR);
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/*
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* ALSA module parameters
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*/
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static int index = -1; /* First available index */
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static char *id = "STx7108"; /* Default card ID */
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module_param(index, int, 0444);
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MODULE_PARM_DESC(index, "Index value for STx7108 audio subsystem "
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"card.");
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module_param(id, charp, 0444);
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MODULE_PARM_DESC(id, "ID string for STx7108 audio subsystem card.");
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/*
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* Audio initialization
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*/
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static struct sysconf_field *snd_stm_stx7108_pcmp_valid_sel;
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static int __init snd_stm_stx7108_init(void)
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{
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int result;
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snd_stm_printd(0, "snd_stm_stx7108_init()\n");
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if (cpu_data->type != CPU_STX7108) {
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snd_stm_printe("Not supported (other than STx7108) SOC "
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"detected!\n");
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result = -EINVAL;
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goto error_soc_type;
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}
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/* Route PCM Player #2 to the digital outputs (PIOs) */
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snd_stm_stx7108_pcmp_valid_sel = sysconf_claim(SYS_CFG_BANK4,
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43, 0, 1, "PCMP_VALID_SEL");
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if (!snd_stm_stx7108_pcmp_valid_sel) {
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snd_stm_printe("Can't claim required sysconf field!\n");
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result = -EBUSY;
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goto error_sysconf_claim;
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}
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sysconf_write(snd_stm_stx7108_pcmp_valid_sel, 2);
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result = snd_stm_card_register();
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if (result != 0) {
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snd_stm_printe("Failed to register ALSA cards!\n");
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goto error_card_register;
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}
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return 0;
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error_card_register:
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sysconf_release(snd_stm_stx7108_pcmp_valid_sel);
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error_sysconf_claim:
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error_soc_type:
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return result;
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}
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static void __exit snd_stm_stx7108_exit(void)
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{
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snd_stm_printd(0, "snd_stm_stx7108_exit()\n");
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sysconf_release(snd_stm_stx7108_pcmp_valid_sel);
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}
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MODULE_AUTHOR("Pawel Moll <pawel.moll@st.com>");
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MODULE_DESCRIPTION("STMicroelectronics STx7108 audio driver");
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MODULE_LICENSE("GPL");
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module_init(snd_stm_stx7108_init);
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module_exit(snd_stm_stx7108_exit);
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