/*
?*?Philips?UDA1341?Audio?Device?Driver?for?S3C2410?Linux
?*
?*?Copyright?（C）?2002?MIZI?Research?Inc.
?*
?*/

#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?

#include?

#include?
#include?
#include?
#include?
#include?
#include?


#undef?DEBUG
#ifdef?DEBUG
#define?DPRINTK（?x...?）??printk（?##x?）
#else
#define?DPRINTK（?x...?）
#endif


/*?UDA1341?Register?bits?*/
#define?UDA1341_ADDR		0x14

#define?UDA1341_REG_DATA	0x0
#define?UDA1341_REG_STATUS	0x2

#define?SC_512fs		（0x0?<#define?SC_384fs		（0x1?<#define?SC_256fs		（0x2?<
#define?IF_IIS			（0x0?<#define?IF_LSB_16		（0x1?<#define?IF_LSB_18		（0x2?<#define?IF_LSB_20		（0x3?<#define?IF_MSB			（0x4?<
#define?MUTE		????????（0x1?<
#define?NO_DE_EMPHASIS		（0x10?<#define?DE_EMPHASIS_32		（0x11?<#define?DE_EMPHASIS_441		（0x12?<#define?DE_EMPHASIS_48		（0x13?<
#define?GPIO_L3CLOCK????????????（GPIO_MODE_OUT?|?GPIO_PULLUP_DIS?|?GPIO_B4）
#define?GPIO_L3DATA?????????????（GPIO_MODE_OUT?|?GPIO_PULLUP_DIS?|?GPIO_B3）
#define?GPIO_L3MODE?????????????（GPIO_MODE_OUT?|?GPIO_PULLUP_DIS?|?GPIO_B2）

#define?AUDIO_NAME		“UDA1341“
#define?AUDIO_NAME_VERBOSE	“UDA1341?audio?driver“

#define?AUDIO_FMT_MASK??????????（AFMT_S16_LE）
#define?AUDIO_FMT_DEFAULT???????（AFMT_S16_LE）

#define?AUDIO_CHANNELS_DEFAULT	2
#define?AUDIO_RATE_DEFAULT	22050

#define?AUDIO_NBFRAGS_DEFAULT	8
#define?AUDIO_FRAGSIZE_DEFAULT	8192

#define?S_CLOCK_FREQ	384
#define?PCM_ABS（a）?（a?
typedef?struct?{
	int?size;		/*?buffer?size?*/
	char?*start;		/*?point?to?actual?buffer?*/
	dma_addr_t?dma_addr;	/*?physical?buffer?address?*/
	struct?semaphore?sem;	/*?down?before?touching?the?buffer?*/
	int?master;		/*?owner?for?buffer?allocation?contain?size?when?true?*/
}?audio_buf_t;

typedef?struct?{
	audio_buf_t?*buffers;	/*?pointer?to?audio?buffer?structures?*/
	audio_buf_t?*buf;	/*?current?buffer?used?by?read/write?*/
	u_int?buf_idx;		/*?index?for?the?pointer?above?*/
	u_int?fragsize;		/*?fragment?i.e.?buffer?size?*/
	u_int?nbfrags;		/*?nbr?of?fragments?*/
	dmach_t?dma_ch;		/*?DMA?channel?（channel2?for?audio）?*/
}?audio_stream_t;

static?audio_stream_t?output_stream;

#define?NEXT_BUF（_s__b_）?{?\
????????（_s_）->_b_##_idx++;?\
????????（_s_）->_b_##_idx?%=?（_s_）->nbfrags;?\
????????（_s_）->_b_?=?（_s_）->buffers?+?（_s_）->_b_##_idx;?}


static?u_int?audio_rate;
static?int?audio_channels;
static?int?audio_fmt;
static?u_int?audio_fragsize;
static?u_int?audio_nbfrags;


static?int?audio_rd_refcount;
static?int?audio_wr_refcount;
#define?audio_active		（audio_rd_refcount?|?audio_wr_refcount）

static?int?audio_dev_dsp;
static?int?

?屬性????????????大小?????日期????時間???名稱
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?????文件??????33792??2010-06-20?13:21??312007080605211尤靜嵌入式課程設計\音頻驅動移植任務書.doc

?????文件?????172196??2008-04-22?04:00??312007080605211尤靜嵌入式課程設計\jk.wav

?????文件????2860544??2010-06-21?17:44??312007080605211尤靜嵌入式課程設計\音頻驅動程序移植報告.doc

?????文件??????21050??2010-06-18?09:36??312007080605211尤靜嵌入式課程設計\s3c2410-uda1341.c

?????目錄??????????0??2010-06-20?13:21??312007080605211尤靜嵌入式課程設計

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??????????????3087582????????????????????5