trident.c

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/*
 *	OSS driver for Linux 2.[46].x for
 *
 *	Trident 4D-Wave
 *	SiS 7018
 *	ALi 5451
 *	Tvia/IGST CyberPro 5050
 *
 *	Driver: Alan Cox <[e-mail]>
 *
 *  Built from:
 *	Low level code: <[e-mail]> from ALSA
 *	Framework: Thomas Sailer <[e-mail]>
 *	Extended by: Zach Brown <[e-mail]>  
 *
 *  Hacked up by:
 *	Aaron Holtzman <[e-mail]>
 *	Ollie Lho <[e-mail]> SiS 7018 Audio Core Support
 *	Ching-Ling Lee <[e-mail]> ALi 5451 Audio Core Support 
 *	Matt Wu <[e-mail]> ALi 5451 Audio Core Support
 *	Peter W鋍htler <[e-mail]> CyberPro5050 support
 *      Muli Ben-Yehuda <[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.
 *
 *  History
 *  v0.14.10j
 *  	January 3 2004 Eugene Teo <[e-mail]>
 *  	minor cleanup to use pr_debug instead of TRDBG since it is already
 *  	defined in linux/kernel.h.
 *  v0.14.10i
 *      December 29 2003 Muli Ben-Yehuda <[e-mail]>
 *      major cleanup for 2.6, fix a few error patch buglets
 *      with returning without properly cleaning up first,
 *      get rid of lock_kernel().
 *  v0.14.10h
 *	Sept 10 2002 Pascal Schmidt <[e-mail]>
 *	added support for ALi 5451 joystick port
 *  v0.14.10g
 *	Sept 05 2002 Alan Cox <[e-mail]>
 *	adapt to new pci joystick attachment interface
 *  v0.14.10f
 *      July 24 2002 Muli Ben-Yehuda <[e-mail]>
 *      patch from Eric Lemar (via Ian Soboroff): in suspend and resume, 
 *      fix wrong cast from pci_dev* to struct trident_card*. 
 *  v0.14.10e
 *      July 19 2002 Muli Ben-Yehuda <[e-mail]>
 *      rewrite the DMA buffer allocation/deallcoation functions, to make it 
 *      modular and fix a bug where we would call free_pages on memory 
 *      obtained with pci_alloc_consistent. Also remove unnecessary #ifdef 
 *      CONFIG_PROC_FS and various other cleanups.
 *  v0.14.10d
 *      July 19 2002 Muli Ben-Yehuda <[e-mail]>
 *      made several printk(KERN_NOTICE...) into TRDBG(...), to avoid spamming
 *      my syslog with hundreds of messages. 
 *  v0.14.10c
 *      July 16 2002 Muli Ben-Yehuda <[e-mail]>
 *      Cleaned up Lei Hu's 0.4.10 driver to conform to Documentation/CodingStyle
 *      and the coding style used in the rest of the file. 
 *  v0.14.10b
 *      June 23 2002 Muli Ben-Yehuda <[e-mail]>
 *      add a missing unlock_set_fmt, remove a superflous lock/unlock pair 
 *      with nothing in between. 
 *  v0.14.10a
 *      June 21 2002 Muli Ben-Yehuda <[e-mail]> 
 *      use a debug macro instead of #ifdef CONFIG_DEBUG, trim to 80 columns 
 *      per line, use 'do {} while (0)' in statement macros. 
 *  v0.14.10
 *      June 6 2002 Lei Hu <[e-mail]>
 *      rewrite the part to read/write registers of audio codec for Ali5451 
 *  v0.14.9e
 *      January 2 2002 Vojtech Pavlik <[e-mail]> added gameport
 *      support to avoid resource conflict with pcigame.c
 *  v0.14.9d
 *  	October 8 2001 Arnaldo Carvalho de Melo <[e-mail]>
 *	use set_current_state, properly release resources on failure in
 *	trident_probe, get rid of check_region
 *  v0.14.9c
 *	August 10 2001 Peter W鋍htler <[e-mail]>
 *	added support for Tvia (formerly Integraphics/IGST) CyberPro5050
 *	this chip is often found in settop boxes (combined video+audio)
 *  v0.14.9b
 *	Switch to static inline not extern inline (gcc 3)
 *  v0.14.9a
 *	Aug 6 2001 Alan Cox
 *	0.14.9 crashed on rmmod due to a timer/bh left running. Simplified
 *	the existing logic (the BH doesn't help as ac97 is lock_irqsave)
 *	and used del_timer_sync to clean up
 *	Fixed a problem where the ALi change broke my generic card
 *  v0.14.9
 *	Jul 10 2001 Matt Wu
 *	Add H/W Volume Control
 *  v0.14.8a
 *	July 7 2001 Alan Cox
 *	Moved Matt Wu's ac97 register cache into the card structure
 *  v0.14.8
 *	Apr 30 2001 Matt Wu
 *	Set EBUF1 and EBUF2 to still mode
 *	Add dc97/ac97 reset function
 *	Fix power management: ali_restore_regs
 *  unreleased 
 *	Mar 09 2001 Matt Wu
 *	Add cache for ac97 access
 *  v0.14.7
 *	Feb 06 2001 Matt Wu
 *	Fix ac97 initialization
 *	Fix bug: an extra tail will be played when playing
 *	Jan 05 2001 Matt Wu
 *	Implement multi-channels and S/PDIF in support for ALi 1535+
 *  v0.14.6 
 *	Nov 1 2000 Ching-Ling Lee
 *	Fix the bug of memory leak when switching 5.1-channels to 2 channels.
 *	Add lock protection into dynamic changing format of data.
 *	Oct 18 2000 Ching-Ling Lee
 *	5.1-channels support for ALi
 *	June 28 2000 Ching-Ling Lee
 *	S/PDIF out/in(playback/record) support for ALi 1535+, using /proc to be selected by user
 *	Simple Power Management support for ALi
 *  v0.14.5 May 23 2000 Ollie Lho
 *  	Misc bug fix from the Net
 *  v0.14.4 May 20 2000 Aaron Holtzman
 *  	Fix kfree'd memory access in release
 *  	Fix race in open while looking for a free virtual channel slot
 *  	remove open_wait wq (which appears to be unused)
 *  v0.14.3 May 10 2000 Ollie Lho
 *	fixed a small bug in trident_update_ptr, xmms 1.0.1 no longer uses 100% CPU
 *  v0.14.2 Mar 29 2000 Ching-Ling Lee
 *	Add clear to silence advance in trident_update_ptr 
 *	fix invalid data of the end of the sound
 *  v0.14.1 Mar 24 2000 Ching-Ling Lee
 *	ALi 5451 support added, playback and recording O.K.
 *	ALi 5451 originally developed and structured based on sonicvibes, and
 *	suggested to merge into this file by Alan Cox.
 *  v0.14 Mar 15 2000 Ollie Lho
 *	5.1 channel output support with channel binding. What's the Matrix ?
 *  v0.13.1 Mar 10 2000 Ollie Lho
 *	few minor bugs on dual codec support, needs more testing
 *  v0.13 Mar 03 2000 Ollie Lho
 *	new pci_* for 2.4 kernel, back ported to 2.2
 *  v0.12 Feb 23 2000 Ollie Lho
 *	Preliminary Recording support
 *  v0.11.2 Feb 19 2000 Ollie Lho
 *	removed incomplete full-dulplex support
 *  v0.11.1 Jan 28 2000 Ollie Lho
 *	small bug in setting sample rate for 4d-nx (reported by Aaron)
 *  v0.11 Jan 27 2000 Ollie Lho
 *	DMA bug, scheduler latency, second try
 *  v0.10 Jan 24 2000 Ollie Lho
 *	DMA bug fixed, found kernel scheduling problem
 *  v0.09 Jan 20 2000 Ollie Lho
 *	Clean up of channel register access routine (prepare for channel binding)
 *  v0.08 Jan 14 2000 Ollie Lho
 *	Isolation of AC97 codec code
 *  v0.07 Jan 13 2000 Ollie Lho
 *	Get rid of ugly old low level access routines (e.g. CHRegs.lp****)
 *  v0.06 Jan 11 2000 Ollie Lho
 *	Preliminary support for dual (more ?) AC97 codecs
 *  v0.05 Jan 08 2000 Luca Montecchiani <[e-mail]>
 *	adapt to 2.3.x new __setup/__init call
 *  v0.04 Dec 31 1999 Ollie Lho
 *	Multiple Open, using Middle Loop Interrupt to smooth playback
 *  v0.03 Dec 24 1999 Ollie Lho
 *	mem leak in prog_dmabuf and dealloc_dmabuf removed
 *  v0.02 Dec 15 1999 Ollie Lho
 *	SiS 7018 support added, playback O.K.
 *  v0.01 Alan Cox et. al.
 *	Initial Release in kernel 2.3.30, does not work
 * 
 *  ToDo
 *	Clean up of low level channel register access code. (done)
 *	Fix the bug on dma buffer management in update_ptr, read/write, drain_dac (done)
 *	Dual AC97 codecs support (done)
 *	Recording support (done)
 *	Mmap support
 *	"Channel Binding" ioctl extension (done)
 *	new pci device driver interface for 2.4 kernel (done)
 *
 *	Lock order (high->low)
 *		lock	-	hardware lock
 *		open_sem - 	guard opens
 *		sem	-	guard dmabuf, write re-entry etc
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/ctype.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/init.h>
#include <linux/poll.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/ac97_codec.h>
#include <linux/bitops.h>
#include <linux/proc_fs.h>
#include <linux/interrupt.h>
#include <linux/pm.h>
#include <linux/gameport.h>
#include <linux/kernel.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/dma.h>

#if defined(CONFIG_ALPHA_NAUTILUS) || defined(CONFIG_ALPHA_GENERIC)
#include <asm/hwrpb.h>
#endif

#include "trident.h"

#define DRIVER_VERSION "0.14.10j-2.6"

/* magic numbers to protect our data structures */
#define TRIDENT_CARD_MAGIC	0x5072696E	/* "Prin" */
#define TRIDENT_STATE_MAGIC	0x63657373	/* "cess" */

#define TRIDENT_DMA_MASK	0x3fffffff	/* DMA buffer mask for pci_alloc_consist */
#define ALI_DMA_MASK		0x7fffffff	/* ALI Tridents have 31-bit DMA. Wow. */

#define NR_HW_CH		32

/* maximum number of AC97 codecs connected, AC97 2.0 defined 4, but 7018 and 4D-NX only
   have 2 SDATA_IN lines (currently) */
#define NR_AC97		2

/* minor number of /dev/swmodem (temporary, experimental) */
#define SND_DEV_SWMODEM	7

static const unsigned ali_multi_channels_5_1[] = {
	/*ALI_SURR_LEFT_CHANNEL, ALI_SURR_RIGHT_CHANNEL, */
	ALI_CENTER_CHANNEL,
	ALI_LEF_CHANNEL,
	ALI_SURR_LEFT_CHANNEL,
	ALI_SURR_RIGHT_CHANNEL
};

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

static const char invalid_magic[] = KERN_CRIT "trident: invalid magic value in %s\n";

enum {
	TRIDENT_4D_DX = 0,
	TRIDENT_4D_NX,
	SIS_7018,
	ALI_5451,
	CYBER5050
};

static char *card_names[] = {
	"Trident 4DWave DX",
	"Trident 4DWave NX",
	"SiS 7018 PCI Audio",
	"ALi Audio Accelerator",
	"Tvia/IGST CyberPro 5050"
};

static struct pci_device_id trident_pci_tbl[] = {
	{PCI_VENDOR_ID_TRIDENT, PCI_DEVICE_ID_TRIDENT_4DWAVE_DX,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, TRIDENT_4D_DX},
	{PCI_VENDOR_ID_TRIDENT, PCI_DEVICE_ID_TRIDENT_4DWAVE_NX,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, TRIDENT_4D_NX},
	{PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_7018,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, SIS_7018},
	{PCI_VENDOR_ID_ALI, PCI_DEVICE_ID_ALI_5451,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, ALI_5451},
	{PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_5050,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, CYBER5050},
	{0,}
};

MODULE_DEVICE_TABLE(pci, trident_pci_tbl);

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

	/* 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 trident_channel *channel;

		/* OSS buffer management stuff */
		void *rawbuf;
		dma_addr_t dma_handle;
		unsigned buforder;
		unsigned numfrag;
		unsigned fragshift;

		/* 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 error;	/* number of over/underruns */
                /* put process on wait queue when no more space in buffer */
		wait_queue_head_t wait;	

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

		/* OSS stuff */
		unsigned mapped:1;
		unsigned ready:1;
		unsigned endcleared:1;
		unsigned update_flag;
		unsigned ossfragshift;
		int ossmaxfrags;
		unsigned subdivision;

	} dmabuf;

	/* 5.1 channels */
	struct trident_state *other_states[4];
	int multi_channels_adjust_count;
	unsigned chans_num;
	unsigned long fmt_flag;
	/* Guard against mmap/write/read races */
	struct semaphore sem;

};

/* hardware channels */
struct trident_channel {
	int num; /* channel number */
	u32 lba; /* Loop Begine Address, where dma buffer starts */
	u32 eso; /* End Sample Offset, wehre dma buffer ends */ 
	         /* (in the unit of samples) */
	u32 delta; /* delta value, sample rate / 48k for playback, */
	           /* 48k/sample rate for recording */
	u16 attribute; /* control where PCM data go and come  */
	u16 fm_vol;
	u32 control; /* signed/unsigned, 8/16 bits, mono/stereo */
};

struct trident_pcm_bank_address {
	u32 start;
	u32 stop;
	u32 aint;
	u32 aint_en;
};

static struct trident_pcm_bank_address bank_a_addrs = {
	T4D_START_A,
	T4D_STOP_A,
	T4D_AINT_A,
	T4D_AINTEN_A
};

static struct trident_pcm_bank_address bank_b_addrs = {
	T4D_START_B,
	T4D_STOP_B,
	T4D_AINT_B,
	T4D_AINTEN_B
};

struct trident_pcm_bank {
	/* register addresses to control bank operations */
	struct trident_pcm_bank_address *addresses;
	/* each bank has 32 channels */
	u32 bitmap;		/* channel allocation bitmap */
	struct trident_channel channels[32];
};

struct trident_card {
	unsigned int magic;

	/* We keep trident cards in a linked list */
	struct trident_card *next;

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

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

	/* PCI device stuff */
	struct pci_dev *pci_dev;
	u16 pci_id;
	u8 revision;

	/* soundcore stuff */
	int dev_audio;

	/* structures for abstraction of hardware facilities, codecs, */ 
	/* banks and channels */
	struct ac97_codec *ac97_codec[NR_AC97];
	struct trident_pcm_bank banks[NR_BANKS];
	struct trident_state *states[NR_HW_CH];

	/* hardware resources */
	unsigned long iobase;
	u32 irq;

	/* Function support */
	struct trident_channel *(*alloc_pcm_channel) (struct trident_card *);
	struct trident_channel *(*alloc_rec_pcm_channel) (struct trident_card *);
	void (*free_pcm_channel) (struct trident_card *, unsigned int chan);
	void (*address_interrupt) (struct trident_card *);

	/* Added by Matt Wu 01-05-2001 for spdif in */
	int multi_channel_use_count;
	int rec_channel_use_count;
	u16 mixer_regs[64][NR_AC97];	/* Made card local by Alan */
	int mixer_regs_ready;

	/* Added for hardware volume control */
	int hwvolctl;
	struct timer_list timer;

	/* Game port support */
	struct gameport gameport;
};

enum dmabuf_mode {
	DM_PLAYBACK = 0,
	DM_RECORD
};

/* table to map from CHANNELMASK to channel attribute for SiS 7018 */
static u16 mask2attr[] = {
	PCM_LR, PCM_LR, SURR_LR, CENTER_LFE,
	HSET, MIC, MODEM_LINE1, MODEM_LINE2,
	I2S_LR, SPDIF_LR
};