es1371.c

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/*
 *      es1371.c  --  Creative Ensoniq ES1371.
 *
 *      Copyright (C) 1998-2001  Thomas Sailer ([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.
 *
 * Special thanks to Ensoniq
 *
 *
 * Module command line parameters:
 *   joystick must be set to the base I/O-Port to be used for
 *   the gameport. Legal values are 0x200, 0x208, 0x210 and 0x218.         
 *   The gameport is mirrored eight times.
 *        
 *  Supported devices:
 *  /dev/dsp    standard /dev/dsp device, (mostly) OSS compatible
 *  /dev/mixer  standard /dev/mixer device, (mostly) OSS compatible
 *  /dev/dsp1   additional DAC, like /dev/dsp, but outputs to mixer "SYNTH" setting
 *  /dev/midi   simple MIDI UART interface, no ioctl
 *
 *  NOTE: the card does not have any FM/Wavetable synthesizer, it is supposed
 *  to be done in software. That is what /dev/dac is for. By now (Q2 1998)
 *  there are several MIDI to PCM (WAV) packages, one of them is timidity.
 *
 *  Revision history
 *    04.06.1998   0.1   Initial release
 *                       Mixer stuff should be overhauled; especially optional AC97 mixer bits
 *                       should be detected. This results in strange behaviour of some mixer
 *                       settings, like master volume and mic.
 *    08.06.1998   0.2   First release using Alan Cox' soundcore instead of miscdevice
 *    03.08.1998   0.3   Do not include modversions.h
 *                       Now mixer behaviour can basically be selected between
 *                       "OSS documented" and "OSS actual" behaviour
 *    31.08.1998   0.4   Fix realplayer problems - dac.count issues
 *    27.10.1998   0.5   Fix joystick support
 *                       -- Oliver Neukum ([e-mail])
 *    10.12.1998   0.6   Fix drain_dac trying to wait on not yet initialized DMA
 *    23.12.1998   0.7   Fix a few f_file & FMODE_ bugs
 *                       Don't wake up app until there are fragsize bytes to read/write
 *    06.01.1999   0.8   remove the silly SA_INTERRUPT flag.
 *                       hopefully killed the egcs section type conflict
 *    12.03.1999   0.9   cinfo.blocks should be reset after GETxPTR ioctl.
 *                       reported by Johan Maes <[e-mail]>
 *    22.03.1999   0.10  return EAGAIN instead of EBUSY when O_NONBLOCK
 *                       read/write cannot be executed
 *    07.04.1999   0.11  implemented the following ioctl's: SOUND_PCM_READ_RATE, 
 *                       SOUND_PCM_READ_CHANNELS, SOUND_PCM_READ_BITS; 
 *                       Alpha fixes reported by Peter Jones <[e-mail]>
 *                       Another Alpha fix (wait_src_ready in init routine)
 *                       reported by "Ivan N. Kokshaysky" <[e-mail]>
 *                       Note: joystick address handling might still be wrong on archs
 *                       other than i386
 *    15.06.1999   0.12  Fix bad allocation bug.
 *                       Thanks to Deti Fliegl <[e-mail]>
 *    28.06.1999   0.13  Add pci_set_master
 *    03.08.1999   0.14  adapt to Linus' new __setup/__initcall
 *                       added kernel command line option "es1371=joystickaddr"
 *                       removed CONFIG_SOUND_ES1371_JOYPORT_BOOT kludge
 *    10.08.1999   0.15  (Re)added S/PDIF module option for cards revision >= 4.
 *                       Initial version by Dave Platt <[e-mail]>.
 *                       module_init/__setup fixes
 *    08.16.1999   0.16  Joe Cotellese <[e-mail]>
 *                       Added detection for ES1371 revision ID so that we can
 *                       detect the ES1373 and later parts.
 *                       added AC97 #defines for readability
 *                       added a /proc file system for dumping hardware state
 *                       updated SRC and CODEC w/r functions to accomodate bugs
 *                       in some versions of the ES137x chips.
 *    31.08.1999   0.17  add spin_lock_init
 *                       replaced current->state = x with set_current_state(x)
 *    03.09.1999   0.18  change read semantics for MIDI to match
 *                       OSS more closely; remove possible wakeup race
 *    21.10.1999   0.19  Round sampling rates, requested by
 *                       Kasamatsu Kenichi <[e-mail]>
 *    27.10.1999   0.20  Added SigmaTel 3D enhancement string
 *                       Codec ID printing changes
 *    28.10.1999   0.21  More waitqueue races fixed
 *                       Joe Cotellese <[e-mail]>
 *                       Changed PCI detection routine so we can more easily
 *                       detect ES137x chip and derivatives.
 *    05.01.2000   0.22  Should now work with rev7 boards; patch by
 *                       Eric Lemar, [e-mail]
 *    08.01.2000   0.23  Prevent some ioctl's from returning bad count values on underrun/overrun;
 *                       Tim Janik's BSE (Bedevilled Sound Engine) found this
 *    07.02.2000   0.24  Use pci_alloc_consistent and pci_register_driver
 *    07.02.2000   0.25  Use ac97_codec
 *    01.03.2000   0.26  SPDIF patch by Mikael Bouillot <[e-mail]>
 *                       Use pci_module_init
 *    21.11.2000   0.27  Initialize dma buffers in poll, otherwise poll may return a bogus mask
 *    12.12.2000   0.28  More dma buffer initializations, patch from
 *                       Tjeerd Mulder <[e-mail]>
 *    05.01.2001   0.29  Hopefully updates will not be required anymore when Creative bumps
 *                       the CT5880 revision.
 *                       suggested by Stephan M黮ler <[e-mail]>
 *    31.01.2001   0.30  Register/Unregister gameport
 *                       Fix SETTRIGGER non OSS API conformity
 *    14.07.2001   0.31  Add list of laptops needing amplifier control
 */

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#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/init.h>
#include <linux/poll.h>
#include <linux/bitops.h>
#include <linux/proc_fs.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/ac97_codec.h>
#include <linux/wrapper.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/uaccess.h>
#include <asm/hardirq.h>
#include <linux/gameport.h>

/* --------------------------------------------------------------------- */

#undef OSS_DOCUMENTED_MIXER_SEMANTICS
#define ES1371_DEBUG
#define DBG(x) {}
/*#define DBG(x) {x}*/

/* --------------------------------------------------------------------- */

#ifndef PCI_VENDOR_ID_ENSONIQ
#define PCI_VENDOR_ID_ENSONIQ        0x1274    
#endif

#ifndef PCI_VENDOR_ID_ECTIVA
#define PCI_VENDOR_ID_ECTIVA         0x1102
#endif

#ifndef PCI_DEVICE_ID_ENSONIQ_ES1371
#define PCI_DEVICE_ID_ENSONIQ_ES1371 0x1371
#endif

#ifndef PCI_DEVICE_ID_ENSONIQ_CT5880
#define PCI_DEVICE_ID_ENSONIQ_CT5880 0x5880
#endif

#ifndef PCI_DEVICE_ID_ECTIVA_EV1938
#define PCI_DEVICE_ID_ECTIVA_EV1938 0x8938
#endif

/* ES1371 chip ID */
/* This is a little confusing because all ES1371 compatible chips have the
   same DEVICE_ID, the only thing differentiating them is the REV_ID field.
   This is only significant if you want to enable features on the later parts.
   Yes, I know it's stupid and why didn't we use the sub IDs?
*/
#define ES1371REV_ES1373_A  0x04
#define ES1371REV_ES1373_B  0x06
#define ES1371REV_CT5880_A  0x07
#define CT5880REV_CT5880_C  0x02
#define CT5880REV_CT5880_D  0x03
#define ES1371REV_ES1371_B  0x09
#define EV1938REV_EV1938_A  0x00
#define ES1371REV_ES1373_8  0x08

#define ES1371_MAGIC  ((PCI_VENDOR_ID_ENSONIQ<<16)|PCI_DEVICE_ID_ENSONIQ_ES1371)

#define ES1371_EXTENT             0x40
#define JOY_EXTENT                8

#define ES1371_REG_CONTROL        0x00
#define ES1371_REG_STATUS         0x04 /* on the 5880 it is control/status */
#define ES1371_REG_UART_DATA      0x08
#define ES1371_REG_UART_STATUS    0x09
#define ES1371_REG_UART_CONTROL   0x09
#define ES1371_REG_UART_TEST      0x0a
#define ES1371_REG_MEMPAGE        0x0c
#define ES1371_REG_SRCONV         0x10
#define ES1371_REG_CODEC          0x14
#define ES1371_REG_LEGACY         0x18
#define ES1371_REG_SERIAL_CONTROL 0x20
#define ES1371_REG_DAC1_SCOUNT    0x24
#define ES1371_REG_DAC2_SCOUNT    0x28
#define ES1371_REG_ADC_SCOUNT     0x2c

#define ES1371_REG_DAC1_FRAMEADR  0xc30
#define ES1371_REG_DAC1_FRAMECNT  0xc34
#define ES1371_REG_DAC2_FRAMEADR  0xc38
#define ES1371_REG_DAC2_FRAMECNT  0xc3c
#define ES1371_REG_ADC_FRAMEADR   0xd30
#define ES1371_REG_ADC_FRAMECNT   0xd34

#define ES1371_FMT_U8_MONO     0
#define ES1371_FMT_U8_STEREO   1
#define ES1371_FMT_S16_MONO    2
#define ES1371_FMT_S16_STEREO  3
#define ES1371_FMT_STEREO      1
#define ES1371_FMT_S16         2
#define ES1371_FMT_MASK        3

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

#define CTRL_RECEN_B    0x08000000  /* 1 = don't mix analog in to digital out */
#define CTRL_SPDIFEN_B  0x04000000
#define CTRL_JOY_SHIFT  24
#define CTRL_JOY_MASK   3
#define CTRL_JOY_200    0x00000000  /* joystick base address */
#define CTRL_JOY_208    0x01000000
#define CTRL_JOY_210    0x02000000
#define CTRL_JOY_218    0x03000000
#define CTRL_GPIO_IN0   0x00100000  /* general purpose inputs/outputs */
#define CTRL_GPIO_IN1   0x00200000
#define CTRL_GPIO_IN2   0x00400000
#define CTRL_GPIO_IN3   0x00800000
#define CTRL_GPIO_OUT0  0x00010000
#define CTRL_GPIO_OUT1  0x00020000
#define CTRL_GPIO_OUT2  0x00040000
#define CTRL_GPIO_OUT3  0x00080000
#define CTRL_MSFMTSEL   0x00008000  /* MPEG serial data fmt: 0 = Sony, 1 = I2S */
#define CTRL_SYNCRES    0x00004000  /* AC97 warm reset */
#define CTRL_ADCSTOP    0x00002000  /* stop ADC transfers */
#define CTRL_PWR_INTRM  0x00001000  /* 1 = power level ints enabled */
#define CTRL_M_CB       0x00000800  /* recording source: 0 = ADC, 1 = MPEG */
#define CTRL_CCB_INTRM  0x00000400  /* 1 = CCB "voice" ints enabled */
#define CTRL_PDLEV0     0x00000000  /* power down level */
#define CTRL_PDLEV1     0x00000100
#define CTRL_PDLEV2     0x00000200
#define CTRL_PDLEV3     0x00000300
#define CTRL_BREQ       0x00000080  /* 1 = test mode (internal mem test) */
#define CTRL_DAC1_EN    0x00000040  /* enable DAC1 */
#define CTRL_DAC2_EN    0x00000020  /* enable DAC2 */
#define CTRL_ADC_EN     0x00000010  /* enable ADC */
#define CTRL_UART_EN    0x00000008  /* enable MIDI uart */
#define CTRL_JYSTK_EN   0x00000004  /* enable Joystick port */
#define CTRL_XTALCLKDIS 0x00000002  /* 1 = disable crystal clock input */
#define CTRL_PCICLKDIS  0x00000001  /* 1 = disable PCI clock distribution */


#define STAT_INTR       0x80000000  /* wired or of all interrupt bits */
#define CSTAT_5880_AC97_RST 0x20000000 /* CT5880 Reset bit */
#define STAT_EN_SPDIF   0x00040000  /* enable S/PDIF circuitry */
#define STAT_TS_SPDIF   0x00020000  /* test S/PDIF circuitry */
#define STAT_TESTMODE   0x00010000  /* test ASIC */
#define STAT_SYNC_ERR   0x00000100  /* 1 = codec sync error */
#define STAT_VC         0x000000c0  /* CCB int source, 0=DAC1, 1=DAC2, 2=ADC, 3=undef */
#define STAT_SH_VC      6
#define STAT_MPWR       0x00000020  /* power level interrupt */
#define STAT_MCCB       0x00000010  /* CCB int pending */
#define STAT_UART       0x00000008  /* UART int pending */
#define STAT_DAC1       0x00000004  /* DAC1 int pending */
#define STAT_DAC2       0x00000002  /* DAC2 int pending */
#define STAT_ADC        0x00000001  /* ADC int pending */

#define USTAT_RXINT     0x80        /* UART rx int pending */
#define USTAT_TXINT     0x04        /* UART tx int pending */
#define USTAT_TXRDY     0x02        /* UART tx ready */
#define USTAT_RXRDY     0x01        /* UART rx ready */

#define UCTRL_RXINTEN   0x80        /* 1 = enable RX ints */
#define UCTRL_TXINTEN   0x60        /* TX int enable field mask */
#define UCTRL_ENA_TXINT 0x20        /* enable TX int */
#define UCTRL_CNTRL     0x03        /* control field */
#define UCTRL_CNTRL_SWR 0x03        /* software reset command */

/* sample rate converter */
#define SRC_OKSTATE        1

#define SRC_RAMADDR_MASK   0xfe000000
#define SRC_RAMADDR_SHIFT  25
#define SRC_DAC1FREEZE     (1UL << 21)
#define SRC_DAC2FREEZE      (1UL << 20)
#define SRC_ADCFREEZE      (1UL << 19)


#define SRC_WE             0x01000000  /* read/write control for SRC RAM */
#define SRC_BUSY           0x00800000  /* SRC busy */
#define SRC_DIS            0x00400000  /* 1 = disable SRC */
#define SRC_DDAC1          0x00200000  /* 1 = disable accum update for DAC1 */
#define SRC_DDAC2          0x00100000  /* 1 = disable accum update for DAC2 */
#define SRC_DADC           0x00080000  /* 1 = disable accum update for ADC2 */
#define SRC_CTLMASK        0x00780000
#define SRC_RAMDATA_MASK   0x0000ffff
#define SRC_RAMDATA_SHIFT  0

#define SRCREG_ADC      0x78
#define SRCREG_DAC1     0x70
#define SRCREG_DAC2     0x74
#define SRCREG_VOL_ADC  0x6c
#define SRCREG_VOL_DAC1 0x7c
#define SRCREG_VOL_DAC2 0x7e

#define SRCREG_TRUNC_N     0x00
#define SRCREG_INT_REGS    0x01
#define SRCREG_ACCUM_FRAC  0x02
#define SRCREG_VFREQ_FRAC  0x03

#define CODEC_PIRD        0x00800000  /* 0 = write AC97 register */
#define CODEC_PIADD_MASK  0x007f0000
#define CODEC_PIADD_SHIFT 16
#define CODEC_PIDAT_MASK  0x0000ffff
#define CODEC_PIDAT_SHIFT 0

#define CODEC_RDY         0x80000000  /* AC97 read data valid */
#define CODEC_WIP         0x40000000  /* AC97 write in progress */
#define CODEC_PORD        0x00800000  /* 0 = write AC97 register */
#define CODEC_POADD_MASK  0x007f0000
#define CODEC_POADD_SHIFT 16
#define CODEC_PODAT_MASK  0x0000ffff
#define CODEC_PODAT_SHIFT 0


#define LEGACY_JFAST      0x80000000  /* fast joystick timing */
#define LEGACY_FIRQ       0x01000000  /* force IRQ */

#define SCTRL_DACTEST     0x00400000  /* 1 = DAC test, test vector generation purposes */
#define SCTRL_P2ENDINC    0x00380000  /*  */
#define SCTRL_SH_P2ENDINC 19
#define SCTRL_P2STINC     0x00070000  /*  */
#define SCTRL_SH_P2STINC  16
#define SCTRL_R1LOOPSEL   0x00008000  /* 0 = loop mode */
#define SCTRL_P2LOOPSEL   0x00004000  /* 0 = loop mode */
#define SCTRL_P1LOOPSEL   0x00002000  /* 0 = loop mode */
#define SCTRL_P2PAUSE     0x00001000  /* 1 = pause mode */
#define SCTRL_P1PAUSE     0x00000800  /* 1 = pause mode */
#define SCTRL_R1INTEN     0x00000400  /* enable interrupt */
#define SCTRL_P2INTEN     0x00000200  /* enable interrupt */
#define SCTRL_P1INTEN     0x00000100  /* enable interrupt */
#define SCTRL_P1SCTRLD    0x00000080  /* reload sample count register for DAC1 */
#define SCTRL_P2DACSEN    0x00000040  /* 1 = DAC2 play back last sample when disabled */
#define SCTRL_R1SEB       0x00000020  /* 1 = 16bit */
#define SCTRL_R1SMB       0x00000010  /* 1 = stereo */
#define SCTRL_R1FMT       0x00000030  /* format mask */
#define SCTRL_SH_R1FMT    4
#define SCTRL_P2SEB       0x00000008  /* 1 = 16bit */
#define SCTRL_P2SMB       0x00000004  /* 1 = stereo */
#define SCTRL_P2FMT       0x0000000c  /* format mask */
#define SCTRL_SH_P2FMT    2
#define SCTRL_P1SEB       0x00000002  /* 1 = 16bit */
#define SCTRL_P1SMB       0x00000001  /* 1 = stereo */
#define SCTRL_P1FMT       0x00000003  /* format mask */
#define SCTRL_SH_P1FMT    0


/* misc stuff */
#define POLL_COUNT   0x1000
#define FMODE_DAC         4           /* slight misuse of mode_t */

/* MIDI buffer sizes */

#define MIDIINBUF  256
#define MIDIOUTBUF 256

#define FMODE_MIDI_SHIFT 3
#define FMODE_MIDI_READ  (FMODE_READ << FMODE_MIDI_SHIFT)
#define FMODE_MIDI_WRITE (FMODE_WRITE << FMODE_MIDI_SHIFT)

#define ES1371_MODULE_NAME "es1371"
#define PFX ES1371_MODULE_NAME ": "

/* --------------------------------------------------------------------- */

struct es1371_state {
	/* magic */
	unsigned int magic;

	/* list of es1371 devices */
	struct list_head devs;

	/* the corresponding pci_dev structure */
	struct pci_dev *dev;

	/* soundcore stuff */
	int dev_audio;
	int dev_dac;
	int dev_midi;
	
	/* hardware resources */
	unsigned long io; /* long for SPARC */
	unsigned int irq;

	/* PCI ID's */
	u16 vendor;
	u16 device;
        u8 rev; /* the chip revision */

	/* options */
	int spdif_volume; /* S/PDIF output is enabled if != -1 */

#ifdef ES1371_DEBUG
        /* debug /proc entry */