cs46xx.c

iis s3c2410-uda1341语音系统的 开发

/*
 *	Crystal SoundFusion CS46xx driver
 *
 *	Copyright 1998-2001 Cirrus Logic Corporation <[e-mail]>
 *						<[e-mail]>
 *	Copyright 1999-2000 Jaroslav Kysela <[e-mail]>
 *	Copyright 2000 Alan Cox <[e-mail]>
 *
 *	The core of this code is taken from the ALSA project driver by 
 *	Jaroslav. Please send Jaroslav the credit for the driver and 
 *	report bugs in this port to <[e-mail]>
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 *	This program is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *	GNU General Public License for more details.
 *
 *	You should have received a copy of the GNU General Public License
 *	along with this program; if not, write to the Free Software
 *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *	Current maintainers:
 *		Cirrus Logic Corporation, Thomas Woller (tw)
 *			<[e-mail]>
 *		Nils Faerber (nf)
 *			<[e-mail]>
 *		Thanks to David Pollard for testing.
 *
 *	Changes:
 *	20000909-nf	Changed cs_read, cs_write and drain_dac
 *	20001025-tw	Separate Playback/Capture structs and buffers.
 *			Added Scatter/Gather support for Playback.
 *			Added Capture.
 *	20001027-nf	Port to kernel 2.4.0-test9, some clean-ups
 *			Start of powermanagement support (CS46XX_PM).
 *	20001128-tw	Add module parm for default buffer order.
 *			added DMA_GFP flag to kmalloc dma buffer allocs.
 *			backfill silence to eliminate stuttering on
 *			underruns.
 *	20001201-tw	add resyncing of swptr on underruns.
 *	20001205-tw-nf	fixed GETOSPACE ioctl() after open()
 *	20010113-tw	patch from Hans Grobler general cleanup.
 *	20010117-tw	2.4.0 pci cleanup, wrapper code for 2.2.16-2.4.0
 *	20010118-tw	basic PM support for 2.2.16+ and 2.4.0/2.4.2.
 *	20010228-dh	patch from David Huggins - cs_update_ptr recursion.
 *	20010409-tw	add hercules game theatre XP amp code.
 *	20010420-tw	cleanup powerdown/up code.
 *	20010521-tw	eliminate pops, and fixes for powerdown.
 *	20010525-tw	added fixes for thinkpads with powerdown logic.
 *	20010723-sh     patch from Horms (Simon Horman) -
 *	                SOUND_PCM_READ_BITS returns bits as set in driver
 *	                rather than a logical or of the possible values.
 *	                Various ioctls handle the case where the device
 *	                is open for reading or writing but not both better.
 *
 *	Status:
 *	Playback/Capture supported from 8k-48k.
 *	16Bit Signed LE & 8Bit Unsigned, with Mono or Stereo supported.
 *
 *	APM/PM - 2.2.x APM is enabled and functioning fine. APM can also
 *	be enabled for 2.4.x by modifying the CS46XX_ACPI_SUPPORT macro
 *	definition.
 *
 *      Hercules Game Theatre XP - the EGPIO2 pin controls the external Amp,
 *	so, use the drain/polarity to enable.  
 *	hercules_egpio_disable set to 1, will force a 0 to EGPIODR.
 *
 *	VTB Santa Cruz - the GPIO7/GPIO8 on the Secondary Codec control
 *	the external amplifier for the "back" speakers, since we do not
 *	support the secondary codec then this external amp is also not
 *	turned on.
 */
 
#include <linux/list.h>
#include <linux/version.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/sound.h>
#include <linux/slab.h>
#include <linux/soundcard.h>
#include <linux/pci.h>
#include <linux/bitops.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/smp_lock.h>
#include <linux/wrapper.h>
#include <asm/uaccess.h>
#include <asm/hardirq.h>
#include <linux/ac97_codec.h>
#include "cs46xxpm-24.h"
#include "cs46xx_wrapper-24.h"

#include "cs461x.h"

/* MIDI buffer sizes */
#define CS_MIDIINBUF  500
#define CS_MIDIOUTBUF 500

#define ADC_RUNNING	1
#define DAC_RUNNING	2

#define CS_FMT_16BIT	1		/* These are fixed in fact */
#define CS_FMT_STEREO	2
#define CS_FMT_MASK	3

#define CS_TYPE_ADC	1
#define CS_TYPE_DAC	2

#define CS_TRUE 	1
#define CS_FALSE 	0

#define CS_INC_USE_COUNT(m) (atomic_inc(m))
#define CS_DEC_USE_COUNT(m) (atomic_dec(m))
#define CS_DEC_AND_TEST(m) (atomic_dec_and_test(m))
#define CS_IN_USE(m) (atomic_read(m) != 0)

#define CS_DBGBREAKPOINT {__asm__("INT $3");}
/*
 *	CS461x definitions
 */
 
#define CS461X_BA0_SIZE		0x2000
#define CS461X_BA1_DATA0_SIZE	0x3000
#define CS461X_BA1_DATA1_SIZE	0x3800
#define CS461X_BA1_PRG_SIZE	0x7000
#define CS461X_BA1_REG_SIZE	0x0100

#define GOF_PER_SEC	200

#define CSDEBUG_INTERFACE 1
#define CSDEBUG 1
/*
 * Turn on/off debugging compilation by using 1/0 respectively for CSDEBUG
 *
 *
 * CSDEBUG is usual mode is set to 1, then use the
 * cs_debuglevel and cs_debugmask to turn on or off debugging.
 * Debug level of 1 has been defined to be kernel errors and info
 * that should be printed on any released driver.
 */
#if CSDEBUG
#define CS_DBGOUT(mask,level,x) if((cs_debuglevel >= (level)) && ((mask) & cs_debugmask)) {x;} 
#else
#define CS_DBGOUT(mask,level,x) 
#endif
/*
 * cs_debugmask areas
 */
#define CS_INIT	 	0x00000001		/* initialization and probe functions */
#define CS_ERROR 	0x00000002		/* tmp debugging bit placeholder */
#define CS_INTERRUPT	0x00000004		/* interrupt handler (separate from all other) */
#define CS_FUNCTION 	0x00000008		/* enter/leave functions */
#define CS_WAVE_WRITE 	0x00000010		/* write information for wave */
#define CS_WAVE_READ 	0x00000020		/* read information for wave */
#define CS_MIDI_WRITE 	0x00000040		/* write information for midi */
#define CS_MIDI_READ 	0x00000080		/* read information for midi */
#define CS_MPU401_WRITE 0x00000100		/* write information for mpu401 */
#define CS_MPU401_READ 	0x00000200		/* read information for mpu401 */
#define CS_OPEN		0x00000400		/* all open functions in the driver */
#define CS_RELEASE	0x00000800		/* all release functions in the driver */
#define CS_PARMS	0x00001000		/* functional and operational parameters */
#define CS_IOCTL	0x00002000		/* ioctl (non-mixer) */
#define CS_PM		0x00004000		/* PM */
#define CS_TMP		0x10000000		/* tmp debug mask bit */

#define CS_IOCTL_CMD_SUSPEND	0x1	// suspend
#define CS_IOCTL_CMD_RESUME	0x2	// resume

#if CSDEBUG
static unsigned long cs_debuglevel=1;			/* levels range from 1-9 */
MODULE_PARM(cs_debuglevel, "i");
static unsigned long cs_debugmask=CS_INIT | CS_ERROR;	/* use CS_DBGOUT with various mask values */
MODULE_PARM(cs_debugmask, "i");
#endif
static unsigned long hercules_egpio_disable=0;  /* if non-zero set all EGPIO to 0 */
MODULE_PARM(hercules_egpio_disable, "i");
static unsigned long initdelay=700;  /* PM delay in millisecs */
MODULE_PARM(initdelay, "i");
static unsigned long powerdown=-1;  /* turn on/off powerdown processing in driver */
MODULE_PARM(powerdown, "i");
#define DMABUF_DEFAULTORDER 3
static unsigned long defaultorder=DMABUF_DEFAULTORDER;
MODULE_PARM(defaultorder, "i");

static int external_amp;
MODULE_PARM(external_amp, "i");
static int thinkpad;
MODULE_PARM(thinkpad, "i");

/*
* set the powerdown module parm to 0 to disable all 
* powerdown. also set thinkpad to 1 to disable powerdown, 
* but also to enable the clkrun functionality.
*/
static unsigned cs_powerdown=1;
static unsigned cs_laptop_wait=1;

/* An instance of the 4610 channel */
struct cs_channel 
{
	int used;
	int num;
	void *state;
};

#define CS46XX_MAJOR_VERSION "1"
#define CS46XX_MINOR_VERSION "28"

#ifdef __ia64__
#define CS46XX_ARCH	     	"64"	//architecture key
#else
#define CS46XX_ARCH	     	"32"	//architecture key
#endif

struct list_head cs46xx_devs = { &cs46xx_devs, &cs46xx_devs };

/* magic numbers to protect our data structures */
#define CS_CARD_MAGIC		0x43525553 /* "CRUS" */
#define CS_STATE_MAGIC		0x4c4f4749 /* "LOGI" */
#define NR_HW_CH		3

/* maxinum number of AC97 codecs connected, AC97 2.0 defined 4 */
#define NR_AC97		2

static const unsigned sample_size[] = { 1, 2, 2, 4 };
static const unsigned sample_shift[] = { 0, 1, 1, 2 };

/* "software" or virtual channel, an instance of opened /dev/dsp */
struct cs_state {
	unsigned int magic;
	struct cs_card *card;	/* Card info */

	/* single open lock mechanism, only used for recording */
	struct semaphore open_sem;
	wait_queue_head_t open_wait;

	/* file mode */
	mode_t open_mode;

	/* virtual channel number */
	int virt;
	
	struct dmabuf {
		/* wave sample stuff */
		unsigned int rate;
		unsigned char fmt, enable;

		/* hardware channel */
		struct cs_channel *channel;
		int pringbuf;		/* Software ring slot */
		void *pbuf;		/* 4K hardware DMA buffer */

		/* OSS buffer management stuff */
		void *rawbuf;
		dma_addr_t dma_handle;
		unsigned buforder;
		unsigned numfrag;
		unsigned fragshift;
		unsigned divisor;
		unsigned type;
		void *tmpbuff;			/* tmp buffer for sample conversions */
		dma_addr_t dmaaddr;
		dma_addr_t dmaaddr_tmpbuff;
		unsigned buforder_tmpbuff;	/* Log base 2 of size in bytes.. */

		/* our buffer acts like a circular ring */
		unsigned hwptr;		/* where dma last started, updated by update_ptr */
		unsigned swptr;		/* where driver last clear/filled, updated by read/write */
		int count;		/* bytes to be comsumed or been generated by dma machine */
		unsigned total_bytes;	/* total bytes dmaed by hardware */
		unsigned blocks;	/* total blocks */

		unsigned error;		/* number of over/underruns */
		unsigned underrun;	/* underrun pending before next write has occurred */
		wait_queue_head_t wait;	/* put process on wait queue when no more space in buffer */

		/* redundant, but makes calculations easier */
		unsigned fragsize;
		unsigned dmasize;
		unsigned fragsamples;

		/* OSS stuff */
		unsigned mapped:1;
		unsigned ready:1;
		unsigned endcleared:1;
		unsigned SGok:1;
		unsigned update_flag;
		unsigned ossfragshift;
		int ossmaxfrags;
		unsigned subdivision;
	} dmabuf;
	/* Guard against mmap/write/read races */
	struct semaphore sem;
};

struct cs_card {
	struct cs_channel channel[2];
	unsigned int magic;

	/* We keep cs461x cards in a linked list */
	struct cs_card *next;

	/* The cs461x has a certain amount of cross channel interaction
	   so we use a single per card lock */
	spinlock_t lock;

	/* mixer use count */
	atomic_t mixer_use_cnt;

	/* PCI device stuff */
	struct pci_dev * pci_dev;
	struct list_head list;

	unsigned int pctl, cctl;	/* Hardware DMA flag sets */

	/* soundcore stuff */
	int dev_audio;
	int dev_midi;

	/* structures for abstraction of hardware facilities, codecs, banks and channels*/
	struct ac97_codec *ac97_codec[NR_AC97];
	struct cs_state *states[2];

	u16 ac97_features;
	
	int amplifier;			/* Amplifier control */
	void (*amplifier_ctrl)(struct cs_card *, int);
	void (*amp_init)(struct cs_card *);
	
	int active;			/* Active clocking */
	void (*active_ctrl)(struct cs_card *, int);
	
	/* hardware resources */
	unsigned long ba0_addr;
	unsigned long ba1_addr;
	u32 irq;
	
	/* mappings */
	void *ba0;
	union
	{
		struct
		{
			u8 *data0;
			u8 *data1;
			u8 *pmem;
			u8 *reg;
		} name;
		u8 *idx[4];
	} ba1;
	
	/* Function support */
	struct cs_channel *(*alloc_pcm_channel)(struct cs_card *);
	struct cs_channel *(*alloc_rec_pcm_channel)(struct cs_card *);
	void (*free_pcm_channel)(struct cs_card *, int chan);

	/* /dev/midi stuff */
	struct {
		unsigned ird, iwr, icnt;
		unsigned ord, owr, ocnt;
		wait_queue_head_t open_wait;
		wait_queue_head_t iwait;
		wait_queue_head_t owait;
		spinlock_t lock;
		unsigned char ibuf[CS_MIDIINBUF];
		unsigned char obuf[CS_MIDIOUTBUF];
		mode_t open_mode;
		struct semaphore open_sem;
	} midi;
	struct cs46xx_pm pm;
};

static int cs_open_mixdev(struct inode *inode, struct file *file);
static int cs_release_mixdev(struct inode *inode, struct file *file);
static int cs_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd,
				unsigned long arg);
static int cs_hardware_init(struct cs_card *card);
static int cs46xx_powerup(struct cs_card *card, unsigned int type);
static int cs461x_powerdown(struct cs_card *card, unsigned int type, int suspendflag);
static void cs461x_clear_serial_FIFOs(struct cs_card *card, int type);
static int cs46xx_suspend_tbl(struct pci_dev *pcidev, u32 state);
static int cs46xx_resume_tbl(struct pci_dev *pcidev);

static inline unsigned ld2(unsigned int x)
{
	unsigned r = 0;
	
	if (x >= 0x10000) {
		x >>= 16;
		r += 16;
	}
	if (x >= 0x100) {
		x >>= 8;
		r += 8;
	}
	if (x >= 0x10) {
		x >>= 4;
		r += 4;
	}
	if (x >= 4) {
		x >>= 2;
		r += 2;
	}
	if (x >= 2)
		r++;