/* sound/soc/samsung/i2s.c
*
* ALSA SoC Audio Layer - Samsung I2S Controller driver
*
* Copyright (c) 2010 Samsung Electronics Co. Ltd.
* Jaswinder Singh <jassisinghbrar@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/pm_runtime.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#include <mach/dma.h>
#include <linux/platform_data/asoc-s3c.h>
#include "dma.h"
#include "idma.h"
#include "i2s.h"
#include "i2s-regs.h"
#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
enum samsung_dai_type {
TYPE_PRI,
TYPE_SEC,
};
struct samsung_i2s_dai_data {
int dai_type;
};
struct i2s_dai {
/* Platform device for this DAI */
struct platform_device *pdev;
/* IOREMAP'd SFRs */
void __iomem *addr;
/* Physical base address of SFRs */
u32 base;
/* Rate of RCLK source clock */
unsigned long rclk_srcrate;
/* Frame Clock */
unsigned frmclk;
/*
* Specifically requested RCLK,BCLK by MACHINE Driver.
* 0 indicates CPU driver is free to choose any value.
*/
unsigned rfs, bfs;
/* I2S Controller's core clock */
struct clk *clk;
/* Clock for generating I2S signals */
struct clk *op_clk;
/* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
struct i2s_dai *pri_dai;
/* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
struct i2s_dai *sec_dai;
#define DAI_OPENED (1 << 0) /* Dai is opened */
#define DAI_MANAGER (1 << 1) /* Dai is the manager */
unsigned mode;
/* Driver for this DAI */
struct snd_soc_dai_driver i2s_dai_drv;
/* DMA parameters */
struct s3c_dma_params dma_playback;
struct s3c_dma_params dma_capture;
struct s3c_dma_params idma_playback;
u32 quirks;
u32 suspend_i2smod;
u32 suspend_i2scon;
u32 suspend_i2spsr;
unsigned long gpios[7]; /* i2s gpio line numbers */
};
/* Lock for cross i/f checks */
static DEFINE_SPINLOCK(lock);
/* If this is the 'overlay' stereo DAI */
static inline bool is_secondary(struct i2s_dai *i2s)
{
return i2s->pri_dai ? true : false;
}
/* If operating in SoC-Slave mode */
static inline bool is_slave(struct i2s_dai *i2s)
{
return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true 