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3619 lines
89 KiB
3619 lines
89 KiB
/*
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* Support for VIA 82Cxxx Audio Codecs
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* Copyright 1999,2000 Jeff Garzik
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*
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* Updated to support the VIA 8233/8235 audio subsystem
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* Alan Cox <alan@redhat.com> (C) Copyright 2002, 2003 Red Hat Inc
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*
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* Distributed under the GNU GENERAL PUBLIC LICENSE (GPL) Version 2.
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* See the "COPYING" file distributed with this software for more info.
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* NO WARRANTY
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*
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* For a list of known bugs (errata) and documentation,
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* see via-audio.pdf in Documentation/DocBook.
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* If this documentation does not exist, run "make pdfdocs".
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*/
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#define VIA_VERSION "1.9.1-ac4-2.5"
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/pci.h>
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#include <linux/poison.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/proc_fs.h>
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#include <linux/spinlock.h>
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#include <linux/sound.h>
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#include <linux/poll.h>
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#include <linux/soundcard.h>
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#include <linux/ac97_codec.h>
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#include <linux/smp_lock.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <linux/mutex.h>
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#include "sound_config.h"
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#include "dev_table.h"
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#include "mpu401.h"
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#undef VIA_DEBUG /* define to enable debugging output and checks */
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#ifdef VIA_DEBUG
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/* note: prints function name for you */
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#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
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#else
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#define DPRINTK(fmt, args...)
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#endif
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#undef VIA_NDEBUG /* define to disable lightweight runtime checks */
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#ifdef VIA_NDEBUG
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#define assert(expr)
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#else
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#define assert(expr) \
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if(!(expr)) { \
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printk( "Assertion failed! %s,%s,%s,line=%d\n", \
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#expr,__FILE__,__FUNCTION__,__LINE__); \
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}
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#endif
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#define VIA_SUPPORT_MMAP 1 /* buggy, for now... */
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#define MAX_CARDS 1
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#define VIA_CARD_NAME "VIA 82Cxxx Audio driver " VIA_VERSION
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#define VIA_MODULE_NAME "via82cxxx"
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#define PFX VIA_MODULE_NAME ": "
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#define VIA_COUNTER_LIMIT 100000
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/* size of DMA buffers */
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#define VIA_MAX_BUFFER_DMA_PAGES 32
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/* buffering default values in ms */
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#define VIA_DEFAULT_FRAG_TIME 20
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#define VIA_DEFAULT_BUFFER_TIME 500
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/* the hardware has a 256 fragment limit */
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#define VIA_MIN_FRAG_NUMBER 2
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#define VIA_MAX_FRAG_NUMBER 128
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#define VIA_MAX_FRAG_SIZE PAGE_SIZE
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#define VIA_MIN_FRAG_SIZE (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE / VIA_MAX_FRAG_NUMBER)
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/* 82C686 function 5 (audio codec) PCI configuration registers */
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#define VIA_ACLINK_STATUS 0x40
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#define VIA_ACLINK_CTRL 0x41
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#define VIA_FUNC_ENABLE 0x42
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#define VIA_PNP_CONTROL 0x43
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#define VIA_FM_NMI_CTRL 0x48
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/*
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* controller base 0 (scatter-gather) registers
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*
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* NOTE: Via datasheet lists first channel as "read"
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* channel and second channel as "write" channel.
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* I changed the naming of the constants to be more
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* clear than I felt the datasheet to be.
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*/
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#define VIA_BASE0_PCM_OUT_CHAN 0x00 /* output PCM to user */
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#define VIA_BASE0_PCM_OUT_CHAN_STATUS 0x00
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#define VIA_BASE0_PCM_OUT_CHAN_CTRL 0x01
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#define VIA_BASE0_PCM_OUT_CHAN_TYPE 0x02
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#define VIA_BASE0_PCM_IN_CHAN 0x10 /* input PCM from user */
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#define VIA_BASE0_PCM_IN_CHAN_STATUS 0x10
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#define VIA_BASE0_PCM_IN_CHAN_CTRL 0x11
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#define VIA_BASE0_PCM_IN_CHAN_TYPE 0x12
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/* offsets from base */
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#define VIA_PCM_STATUS 0x00
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#define VIA_PCM_CONTROL 0x01
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#define VIA_PCM_TYPE 0x02
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#define VIA_PCM_LEFTVOL 0x02
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#define VIA_PCM_RIGHTVOL 0x03
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#define VIA_PCM_TABLE_ADDR 0x04
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#define VIA_PCM_STOPRATE 0x08 /* 8233+ */
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#define VIA_PCM_BLOCK_COUNT 0x0C
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/* XXX unused DMA channel for FM PCM data */
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#define VIA_BASE0_FM_OUT_CHAN 0x20
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#define VIA_BASE0_FM_OUT_CHAN_STATUS 0x20
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#define VIA_BASE0_FM_OUT_CHAN_CTRL 0x21
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#define VIA_BASE0_FM_OUT_CHAN_TYPE 0x22
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/* Six channel audio output on 8233 */
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#define VIA_BASE0_MULTI_OUT_CHAN 0x40
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#define VIA_BASE0_MULTI_OUT_CHAN_STATUS 0x40
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#define VIA_BASE0_MULTI_OUT_CHAN_CTRL 0x41
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#define VIA_BASE0_MULTI_OUT_CHAN_TYPE 0x42
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#define VIA_BASE0_AC97_CTRL 0x80
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#define VIA_BASE0_SGD_STATUS_SHADOW 0x84
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#define VIA_BASE0_GPI_INT_ENABLE 0x8C
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#define VIA_INTR_OUT ((1<<0) | (1<<4) | (1<<8))
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#define VIA_INTR_IN ((1<<1) | (1<<5) | (1<<9))
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#define VIA_INTR_FM ((1<<2) | (1<<6) | (1<<10))
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#define VIA_INTR_MASK (VIA_INTR_OUT | VIA_INTR_IN | VIA_INTR_FM)
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/* Newer VIA we need to monitor the low 3 bits of each channel. This
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mask covers the channels we don't yet use as well
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*/
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#define VIA_NEW_INTR_MASK 0x77077777UL
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/* VIA_BASE0_AUDIO_xxx_CHAN_TYPE bits */
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#define VIA_IRQ_ON_FLAG (1<<0) /* int on each flagged scatter block */
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#define VIA_IRQ_ON_EOL (1<<1) /* int at end of scatter list */
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#define VIA_INT_SEL_PCI_LAST_LINE_READ (0) /* int at PCI read of last line */
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#define VIA_INT_SEL_LAST_SAMPLE_SENT (1<<2) /* int at last sample sent */
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#define VIA_INT_SEL_ONE_LINE_LEFT (1<<3) /* int at less than one line to send */
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#define VIA_PCM_FMT_STEREO (1<<4) /* PCM stereo format (bit clear == mono) */
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#define VIA_PCM_FMT_16BIT (1<<5) /* PCM 16-bit format (bit clear == 8-bit) */
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#define VIA_PCM_REC_FIFO (1<<6) /* PCM Recording FIFO */
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#define VIA_RESTART_SGD_ON_EOL (1<<7) /* restart scatter-gather at EOL */
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#define VIA_PCM_FMT_MASK (VIA_PCM_FMT_STEREO|VIA_PCM_FMT_16BIT)
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#define VIA_CHAN_TYPE_MASK (VIA_RESTART_SGD_ON_EOL | \
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VIA_IRQ_ON_FLAG | \
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VIA_IRQ_ON_EOL)
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#define VIA_CHAN_TYPE_INT_SELECT (VIA_INT_SEL_LAST_SAMPLE_SENT)
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/* PCI configuration register bits and masks */
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#define VIA_CR40_AC97_READY 0x01
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#define VIA_CR40_AC97_LOW_POWER 0x02
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#define VIA_CR40_SECONDARY_READY 0x04
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#define VIA_CR41_AC97_ENABLE 0x80 /* enable AC97 codec */
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#define VIA_CR41_AC97_RESET 0x40 /* clear bit to reset AC97 */
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#define VIA_CR41_AC97_WAKEUP 0x20 /* wake up from power-down mode */
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#define VIA_CR41_AC97_SDO 0x10 /* force Serial Data Out (SDO) high */
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#define VIA_CR41_VRA 0x08 /* enable variable sample rate */
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#define VIA_CR41_PCM_ENABLE 0x04 /* AC Link SGD Read Channel PCM Data Output */
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#define VIA_CR41_FM_PCM_ENABLE 0x02 /* AC Link FM Channel PCM Data Out */
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#define VIA_CR41_SB_PCM_ENABLE 0x01 /* AC Link SB PCM Data Output */
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#define VIA_CR41_BOOT_MASK (VIA_CR41_AC97_ENABLE | \
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VIA_CR41_AC97_WAKEUP | \
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VIA_CR41_AC97_SDO)
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#define VIA_CR41_RUN_MASK (VIA_CR41_AC97_ENABLE | \
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VIA_CR41_AC97_RESET | \
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VIA_CR41_VRA | \
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VIA_CR41_PCM_ENABLE)
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#define VIA_CR42_SB_ENABLE 0x01
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#define VIA_CR42_MIDI_ENABLE 0x02
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#define VIA_CR42_FM_ENABLE 0x04
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#define VIA_CR42_GAME_ENABLE 0x08
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#define VIA_CR42_MIDI_IRQMASK 0x40
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#define VIA_CR42_MIDI_PNP 0x80
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#define VIA_CR44_SECOND_CODEC_SUPPORT (1 << 6)
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#define VIA_CR44_AC_LINK_ACCESS (1 << 7)
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#define VIA_CR48_FM_TRAP_TO_NMI (1 << 2)
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/* controller base 0 register bitmasks */
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#define VIA_INT_DISABLE_MASK (~(0x01|0x02))
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#define VIA_SGD_STOPPED (1 << 2)
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#define VIA_SGD_PAUSED (1 << 6)
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#define VIA_SGD_ACTIVE (1 << 7)
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#define VIA_SGD_TERMINATE (1 << 6)
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#define VIA_SGD_FLAG (1 << 0)
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#define VIA_SGD_EOL (1 << 1)
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#define VIA_SGD_START (1 << 7)
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#define VIA_CR80_FIRST_CODEC 0
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#define VIA_CR80_SECOND_CODEC (1 << 30)
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#define VIA_CR80_FIRST_CODEC_VALID (1 << 25)
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#define VIA_CR80_VALID (1 << 25)
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#define VIA_CR80_SECOND_CODEC_VALID (1 << 27)
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#define VIA_CR80_BUSY (1 << 24)
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#define VIA_CR83_BUSY (1)
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#define VIA_CR83_FIRST_CODEC_VALID (1 << 1)
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#define VIA_CR80_READ (1 << 23)
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#define VIA_CR80_WRITE_MODE 0
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#define VIA_CR80_REG_IDX(idx) ((((idx) & 0xFF) >> 1) << 16)
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/* capabilities we announce */
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#ifdef VIA_SUPPORT_MMAP
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#define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | DSP_CAP_MMAP | \
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DSP_CAP_TRIGGER | DSP_CAP_REALTIME)
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#else
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#define VIA_DSP_CAP (DSP_CAP_REVISION | DSP_CAP_DUPLEX | \
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DSP_CAP_TRIGGER | DSP_CAP_REALTIME)
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#endif
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/* scatter-gather DMA table entry, exactly as passed to hardware */
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struct via_sgd_table {
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u32 addr;
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u32 count; /* includes additional VIA_xxx bits also */
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};
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#define VIA_EOL (1 << 31)
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#define VIA_FLAG (1 << 30)
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#define VIA_STOP (1 << 29)
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enum via_channel_states {
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sgd_stopped = 0,
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sgd_in_progress = 1,
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};
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struct via_buffer_pgtbl {
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dma_addr_t handle;
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void *cpuaddr;
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};
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struct via_channel {
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atomic_t n_frags;
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atomic_t hw_ptr;
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wait_queue_head_t wait;
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unsigned int sw_ptr;
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unsigned int slop_len;
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unsigned int n_irqs;
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int bytes;
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unsigned is_active : 1;
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unsigned is_record : 1;
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unsigned is_mapped : 1;
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unsigned is_enabled : 1;
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unsigned is_multi: 1; /* 8233 6 channel */
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u8 pcm_fmt; /* VIA_PCM_FMT_xxx */
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u8 channels; /* Channel count */
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unsigned rate; /* sample rate */
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unsigned int frag_size;
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unsigned int frag_number;
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unsigned char intmask;
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volatile struct via_sgd_table *sgtable;
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dma_addr_t sgt_handle;
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unsigned int page_number;
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struct via_buffer_pgtbl pgtbl[VIA_MAX_BUFFER_DMA_PAGES];
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long iobase;
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const char *name;
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};
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/* data stored for each chip */
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struct via_info {
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struct pci_dev *pdev;
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long baseaddr;
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struct ac97_codec *ac97;
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spinlock_t ac97_lock;
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spinlock_t lock;
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int card_num; /* unique card number, from 0 */
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int dev_dsp; /* /dev/dsp index from register_sound_dsp() */
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unsigned rev_h : 1;
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unsigned legacy: 1; /* Has legacy ports */
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unsigned intmask: 1; /* Needs int bits */
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unsigned sixchannel: 1; /* 8233/35 with 6 channel support */
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unsigned volume: 1;
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unsigned locked_rate : 1;
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int mixer_vol; /* 8233/35 volume - not yet implemented */
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struct mutex syscall_mutex;
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struct mutex open_mutex;
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/* The 8233/8235 have 4 DX audio channels, two record and
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one six channel out. We bind ch_in to DX 1, ch_out to multichannel
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and ch_fm to DX 2. DX 3 and REC0/REC1 are unused at the
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moment */
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struct via_channel ch_in;
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struct via_channel ch_out;
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struct via_channel ch_fm;
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#ifdef CONFIG_MIDI_VIA82CXXX
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void *midi_devc;
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struct address_info midi_info;
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#endif
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};
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/* number of cards, used for assigning unique numbers to cards */
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static unsigned via_num_cards;
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/****************************************************************
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*
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* prototypes
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*
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*
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*/
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static int via_init_one (struct pci_dev *dev, const struct pci_device_id *id);
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static void __devexit via_remove_one (struct pci_dev *pdev);
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static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos);
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static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos);
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static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait);
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static int via_dsp_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
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static int via_dsp_open (struct inode *inode, struct file *file);
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static int via_dsp_release(struct inode *inode, struct file *file);
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static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma);
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static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg);
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static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value);
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static u8 via_ac97_wait_idle (struct via_info *card);
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static void via_chan_free (struct via_info *card, struct via_channel *chan);
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static void via_chan_clear (struct via_info *card, struct via_channel *chan);
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static void via_chan_pcm_fmt (struct via_channel *chan, int reset);
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static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan);
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/****************************************************************
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*
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* Various data the driver needs
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*
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*
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*/
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static struct pci_device_id via_pci_tbl[] = {
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{ PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5,
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PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
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{ PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8233_5,
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PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci,via_pci_tbl);
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static struct pci_driver via_driver = {
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.name = VIA_MODULE_NAME,
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.id_table = via_pci_tbl,
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.probe = via_init_one,
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.remove = __devexit_p(via_remove_one),
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};
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/****************************************************************
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*
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* Low-level base 0 register read/write helpers
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*
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*
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*/
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/**
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* via_chan_stop - Terminate DMA on specified PCM channel
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* @iobase: PCI base address for SGD channel registers
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*
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* Terminate scatter-gather DMA operation for given
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* channel (derived from @iobase), if DMA is active.
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*
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* Note that @iobase is not the PCI base address,
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* but the PCI base address plus an offset to
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* one of three PCM channels supported by the chip.
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*
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*/
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static inline void via_chan_stop (long iobase)
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{
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if (inb (iobase + VIA_PCM_STATUS) & VIA_SGD_ACTIVE)
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outb (VIA_SGD_TERMINATE, iobase + VIA_PCM_CONTROL);
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}
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/**
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* via_chan_status_clear - Clear status flags on specified DMA channel
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* @iobase: PCI base address for SGD channel registers
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*
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* Clear any pending status flags for the given
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* DMA channel (derived from @iobase), if any
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* flags are asserted.
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*
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* Note that @iobase is not the PCI base address,
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* but the PCI base address plus an offset to
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* one of three PCM channels supported by the chip.
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*
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*/
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static inline void via_chan_status_clear (long iobase)
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{
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u8 tmp = inb (iobase + VIA_PCM_STATUS);
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if (tmp != 0)
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outb (tmp, iobase + VIA_PCM_STATUS);
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}
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/**
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* sg_begin - Begin recording or playback on a PCM channel
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* @chan: Channel for which DMA operation shall begin
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*
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* Start scatter-gather DMA for the given channel.
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*
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*/
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static inline void sg_begin (struct via_channel *chan)
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{
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DPRINTK("Start with intmask %d\n", chan->intmask);
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DPRINTK("About to start from %d to %d\n",
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inl(chan->iobase + VIA_PCM_BLOCK_COUNT),
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inb(chan->iobase + VIA_PCM_STOPRATE + 3));
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outb (VIA_SGD_START|chan->intmask, chan->iobase + VIA_PCM_CONTROL);
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DPRINTK("Status is now %02X\n", inb(chan->iobase + VIA_PCM_STATUS));
|
|
DPRINTK("Control is now %02X\n", inb(chan->iobase + VIA_PCM_CONTROL));
|
|
}
|
|
|
|
|
|
static int sg_active (long iobase)
|
|
{
|
|
u8 tmp = inb (iobase + VIA_PCM_STATUS);
|
|
if ((tmp & VIA_SGD_STOPPED) || (tmp & VIA_SGD_PAUSED)) {
|
|
printk(KERN_WARNING "via82cxxx warning: SG stopped or paused\n");
|
|
return 0;
|
|
}
|
|
if (tmp & VIA_SGD_ACTIVE)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int via_sg_offset(struct via_channel *chan)
|
|
{
|
|
return inl (chan->iobase + VIA_PCM_BLOCK_COUNT) & 0x00FFFFFF;
|
|
}
|
|
|
|
/****************************************************************
|
|
*
|
|
* Miscellaneous debris
|
|
*
|
|
*
|
|
*/
|
|
|
|
|
|
/**
|
|
* via_syscall_down - down the card-specific syscell semaphore
|
|
* @card: Private info for specified board
|
|
* @nonblock: boolean, non-zero if O_NONBLOCK is set
|
|
*
|
|
* Encapsulates standard method of acquiring the syscall sem.
|
|
*
|
|
* Returns negative errno on error, or zero for success.
|
|
*/
|
|
|
|
static inline int via_syscall_down (struct via_info *card, int nonblock)
|
|
{
|
|
/* Thomas Sailer:
|
|
* EAGAIN is supposed to be used if IO is pending,
|
|
* not if there is contention on some internal
|
|
* synchronization primitive which should be
|
|
* held only for a short time anyway
|
|
*/
|
|
nonblock = 0;
|
|
|
|
if (nonblock) {
|
|
if (!mutex_trylock(&card->syscall_mutex))
|
|
return -EAGAIN;
|
|
} else {
|
|
if (mutex_lock_interruptible(&card->syscall_mutex))
|
|
return -ERESTARTSYS;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* via_stop_everything - Stop all audio operations
|
|
* @card: Private info for specified board
|
|
*
|
|
* Stops all DMA operations and interrupts, and clear
|
|
* any pending status bits resulting from those operations.
|
|
*/
|
|
|
|
static void via_stop_everything (struct via_info *card)
|
|
{
|
|
u8 tmp, new_tmp;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (card != NULL);
|
|
|
|
/*
|
|
* terminate any existing operations on audio read/write channels
|
|
*/
|
|
via_chan_stop (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
|
|
via_chan_stop (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
|
|
via_chan_stop (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
|
|
if(card->sixchannel)
|
|
via_chan_stop (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN);
|
|
|
|
/*
|
|
* clear any existing stops / flags (sanity check mainly)
|
|
*/
|
|
via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
|
|
via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
|
|
via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
|
|
if(card->sixchannel)
|
|
via_chan_status_clear (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN);
|
|
|
|
/*
|
|
* clear any enabled interrupt bits
|
|
*/
|
|
tmp = inb (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
|
|
new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
|
|
if (tmp != new_tmp)
|
|
outb (0, card->baseaddr + VIA_BASE0_PCM_OUT_CHAN_TYPE);
|
|
|
|
tmp = inb (card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
|
|
new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
|
|
if (tmp != new_tmp)
|
|
outb (0, card->baseaddr + VIA_BASE0_PCM_IN_CHAN_TYPE);
|
|
|
|
tmp = inb (card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
|
|
new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
|
|
if (tmp != new_tmp)
|
|
outb (0, card->baseaddr + VIA_BASE0_FM_OUT_CHAN_TYPE);
|
|
|
|
if(card->sixchannel)
|
|
{
|
|
tmp = inb (card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE);
|
|
new_tmp = tmp & ~(VIA_IRQ_ON_FLAG|VIA_IRQ_ON_EOL|VIA_RESTART_SGD_ON_EOL);
|
|
if (tmp != new_tmp)
|
|
outb (0, card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN_TYPE);
|
|
}
|
|
|
|
udelay(10);
|
|
|
|
/*
|
|
* clear any existing flags
|
|
*/
|
|
via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_OUT_CHAN);
|
|
via_chan_status_clear (card->baseaddr + VIA_BASE0_PCM_IN_CHAN);
|
|
via_chan_status_clear (card->baseaddr + VIA_BASE0_FM_OUT_CHAN);
|
|
|
|
DPRINTK ("EXIT\n");
|
|
}
|
|
|
|
|
|
/**
|
|
* via_set_rate - Set PCM rate for given channel
|
|
* @ac97: Pointer to generic codec info struct
|
|
* @chan: Private info for specified channel
|
|
* @rate: Desired PCM sample rate, in Khz
|
|
*
|
|
* Sets the PCM sample rate for a channel.
|
|
*
|
|
* Values for @rate are clamped to a range of 4000 Khz through 48000 Khz,
|
|
* due to hardware constraints.
|
|
*/
|
|
|
|
static int via_set_rate (struct ac97_codec *ac97,
|
|
struct via_channel *chan, unsigned rate)
|
|
{
|
|
struct via_info *card = ac97->private_data;
|
|
int rate_reg;
|
|
u32 dacp;
|
|
u32 mast_vol, phone_vol, mono_vol, pcm_vol;
|
|
u32 mute_vol = 0x8000; /* The mute volume? -- Seems to work! */
|
|
|
|
DPRINTK ("ENTER, rate = %d\n", rate);
|
|
|
|
if (chan->rate == rate)
|
|
goto out;
|
|
if (card->locked_rate) {
|
|
chan->rate = 48000;
|
|
goto out;
|
|
}
|
|
|
|
if (rate > 48000) rate = 48000;
|
|
if (rate < 4000) rate = 4000;
|
|
|
|
rate_reg = chan->is_record ? AC97_PCM_LR_ADC_RATE :
|
|
AC97_PCM_FRONT_DAC_RATE;
|
|
|
|
/* Save current state */
|
|
dacp=via_ac97_read_reg(ac97, AC97_POWER_CONTROL);
|
|
mast_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_STEREO);
|
|
mono_vol = via_ac97_read_reg(ac97, AC97_MASTER_VOL_MONO);
|
|
phone_vol = via_ac97_read_reg(ac97, AC97_HEADPHONE_VOL);
|
|
pcm_vol = via_ac97_read_reg(ac97, AC97_PCMOUT_VOL);
|
|
/* Mute - largely reduces popping */
|
|
via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mute_vol);
|
|
via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mute_vol);
|
|
via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, mute_vol);
|
|
via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, mute_vol);
|
|
/* Power down the DAC */
|
|
via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp|0x0200);
|
|
|
|
/* Set new rate */
|
|
via_ac97_write_reg (ac97, rate_reg, rate);
|
|
|
|
/* Power DAC back up */
|
|
via_ac97_write_reg(ac97, AC97_POWER_CONTROL, dacp);
|
|
udelay (200); /* reduces popping */
|
|
|
|
/* Restore volumes */
|
|
via_ac97_write_reg(ac97, AC97_MASTER_VOL_STEREO, mast_vol);
|
|
via_ac97_write_reg(ac97, AC97_MASTER_VOL_MONO, mono_vol);
|
|
via_ac97_write_reg(ac97, AC97_HEADPHONE_VOL, phone_vol);
|
|
via_ac97_write_reg(ac97, AC97_PCMOUT_VOL, pcm_vol);
|
|
|
|
/* the hardware might return a value different than what we
|
|
* passed to it, so read the rate value back from hardware
|
|
* to see what we came up with
|
|
*/
|
|
chan->rate = via_ac97_read_reg (ac97, rate_reg);
|
|
|
|
if (chan->rate == 0) {
|
|
card->locked_rate = 1;
|
|
chan->rate = 48000;
|
|
printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
|
|
}
|
|
|
|
out:
|
|
DPRINTK ("EXIT, returning rate %d Hz\n", chan->rate);
|
|
return chan->rate;
|
|
}
|
|
|
|
|
|
/****************************************************************
|
|
*
|
|
* Channel-specific operations
|
|
*
|
|
*
|
|
*/
|
|
|
|
|
|
/**
|
|
* via_chan_init_defaults - Initialize a struct via_channel
|
|
* @card: Private audio chip info
|
|
* @chan: Channel to be initialized
|
|
*
|
|
* Zero @chan, and then set all static defaults for the structure.
|
|
*/
|
|
|
|
static void via_chan_init_defaults (struct via_info *card, struct via_channel *chan)
|
|
{
|
|
memset (chan, 0, sizeof (*chan));
|
|
|
|
if(card->intmask)
|
|
chan->intmask = 0x23; /* Turn on the IRQ bits */
|
|
|
|
if (chan == &card->ch_out) {
|
|
chan->name = "PCM-OUT";
|
|
if(card->sixchannel)
|
|
{
|
|
chan->iobase = card->baseaddr + VIA_BASE0_MULTI_OUT_CHAN;
|
|
chan->is_multi = 1;
|
|
DPRINTK("Using multichannel for pcm out\n");
|
|
}
|
|
else
|
|
chan->iobase = card->baseaddr + VIA_BASE0_PCM_OUT_CHAN;
|
|
} else if (chan == &card->ch_in) {
|
|
chan->name = "PCM-IN";
|
|
chan->iobase = card->baseaddr + VIA_BASE0_PCM_IN_CHAN;
|
|
chan->is_record = 1;
|
|
} else if (chan == &card->ch_fm) {
|
|
chan->name = "PCM-OUT-FM";
|
|
chan->iobase = card->baseaddr + VIA_BASE0_FM_OUT_CHAN;
|
|
} else {
|
|
BUG();
|
|
}
|
|
|
|
init_waitqueue_head (&chan->wait);
|
|
|
|
chan->pcm_fmt = VIA_PCM_FMT_MASK;
|
|
chan->is_enabled = 1;
|
|
|
|
chan->frag_number = 0;
|
|
chan->frag_size = 0;
|
|
atomic_set(&chan->n_frags, 0);
|
|
atomic_set (&chan->hw_ptr, 0);
|
|
}
|
|
|
|
/**
|
|
* via_chan_init - Initialize PCM channel
|
|
* @card: Private audio chip info
|
|
* @chan: Channel to be initialized
|
|
*
|
|
* Performs some of the preparations necessary to begin
|
|
* using a PCM channel.
|
|
*
|
|
* Currently the preparations consist of
|
|
* setting the PCM channel to a known state.
|
|
*/
|
|
|
|
|
|
static void via_chan_init (struct via_info *card, struct via_channel *chan)
|
|
{
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
/* bzero channel structure, and init members to defaults */
|
|
via_chan_init_defaults (card, chan);
|
|
|
|
/* stop any existing channel output */
|
|
via_chan_clear (card, chan);
|
|
via_chan_status_clear (chan->iobase);
|
|
via_chan_pcm_fmt (chan, 1);
|
|
|
|
DPRINTK ("EXIT\n");
|
|
}
|
|
|
|
/**
|
|
* via_chan_buffer_init - Initialize PCM channel buffer
|
|
* @card: Private audio chip info
|
|
* @chan: Channel to be initialized
|
|
*
|
|
* Performs some of the preparations necessary to begin
|
|
* using a PCM channel.
|
|
*
|
|
* Currently the preparations include allocating the
|
|
* scatter-gather DMA table and buffers,
|
|
* and passing the
|
|
* address of the DMA table to the hardware.
|
|
*
|
|
* Note that special care is taken when passing the
|
|
* DMA table address to hardware, because it was found
|
|
* during driver development that the hardware did not
|
|
* always "take" the address.
|
|
*/
|
|
|
|
static int via_chan_buffer_init (struct via_info *card, struct via_channel *chan)
|
|
{
|
|
int page, offset;
|
|
int i;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
|
|
chan->intmask = 0;
|
|
if(card->intmask)
|
|
chan->intmask = 0x23; /* Turn on the IRQ bits */
|
|
|
|
if (chan->sgtable != NULL) {
|
|
DPRINTK ("EXIT\n");
|
|
return 0;
|
|
}
|
|
|
|
/* alloc DMA-able memory for scatter-gather table */
|
|
chan->sgtable = pci_alloc_consistent (card->pdev,
|
|
(sizeof (struct via_sgd_table) * chan->frag_number),
|
|
&chan->sgt_handle);
|
|
if (!chan->sgtable) {
|
|
printk (KERN_ERR PFX "DMA table alloc fail, aborting\n");
|
|
DPRINTK ("EXIT\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memset ((void*)chan->sgtable, 0,
|
|
(sizeof (struct via_sgd_table) * chan->frag_number));
|
|
|
|
/* alloc DMA-able memory for scatter-gather buffers */
|
|
|
|
chan->page_number = (chan->frag_number * chan->frag_size) / PAGE_SIZE +
|
|
(((chan->frag_number * chan->frag_size) % PAGE_SIZE) ? 1 : 0);
|
|
|
|
for (i = 0; i < chan->page_number; i++) {
|
|
chan->pgtbl[i].cpuaddr = pci_alloc_consistent (card->pdev, PAGE_SIZE,
|
|
&chan->pgtbl[i].handle);
|
|
|
|
if (!chan->pgtbl[i].cpuaddr) {
|
|
chan->page_number = i;
|
|
goto err_out_nomem;
|
|
}
|
|
|
|
#ifndef VIA_NDEBUG
|
|
memset (chan->pgtbl[i].cpuaddr, 0xBC, chan->frag_size);
|
|
#endif
|
|
|
|
#if 1
|
|
DPRINTK ("dmabuf_pg #%d (h=%lx, v2p=%lx, a=%p)\n",
|
|
i, (long)chan->pgtbl[i].handle,
|
|
virt_to_phys(chan->pgtbl[i].cpuaddr),
|
|
chan->pgtbl[i].cpuaddr);
|
|
#endif
|
|
}
|
|
|
|
for (i = 0; i < chan->frag_number; i++) {
|
|
|
|
page = i / (PAGE_SIZE / chan->frag_size);
|
|
offset = (i % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
|
|
|
|
chan->sgtable[i].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
|
|
chan->sgtable[i].addr = cpu_to_le32 (chan->pgtbl[page].handle + offset);
|
|
|
|
#if 1
|
|
DPRINTK ("dmabuf #%d (32(h)=%lx)\n",
|
|
i,
|
|
(long)chan->sgtable[i].addr);
|
|
#endif
|
|
}
|
|
|
|
/* overwrite the last buffer information */
|
|
chan->sgtable[chan->frag_number - 1].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
|
|
|
|
/* set location of DMA-able scatter-gather info table */
|
|
DPRINTK ("outl (0x%X, 0x%04lX)\n",
|
|
chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR);
|
|
|
|
via_ac97_wait_idle (card);
|
|
outl (chan->sgt_handle, chan->iobase + VIA_PCM_TABLE_ADDR);
|
|
udelay (20);
|
|
via_ac97_wait_idle (card);
|
|
/* load no rate adaption, stereo 16bit, set up ring slots */
|
|
if(card->sixchannel)
|
|
{
|
|
if(!chan->is_multi)
|
|
{
|
|
outl (0xFFFFF | (0x3 << 20) | (chan->frag_number << 24), chan->iobase + VIA_PCM_STOPRATE);
|
|
udelay (20);
|
|
via_ac97_wait_idle (card);
|
|
}
|
|
}
|
|
|
|
DPRINTK ("inl (0x%lX) = %x\n",
|
|
chan->iobase + VIA_PCM_TABLE_ADDR,
|
|
inl(chan->iobase + VIA_PCM_TABLE_ADDR));
|
|
|
|
DPRINTK ("EXIT\n");
|
|
return 0;
|
|
|
|
err_out_nomem:
|
|
printk (KERN_ERR PFX "DMA buffer alloc fail, aborting\n");
|
|
via_chan_buffer_free (card, chan);
|
|
DPRINTK ("EXIT\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
|
|
/**
|
|
* via_chan_free - Release a PCM channel
|
|
* @card: Private audio chip info
|
|
* @chan: Channel to be released
|
|
*
|
|
* Performs all the functions necessary to clean up
|
|
* an initialized channel.
|
|
*
|
|
* Currently these functions include disabled any
|
|
* active DMA operations, setting the PCM channel
|
|
* back to a known state, and releasing any allocated
|
|
* sound buffers.
|
|
*/
|
|
|
|
static void via_chan_free (struct via_info *card, struct via_channel *chan)
|
|
{
|
|
DPRINTK ("ENTER\n");
|
|
|
|
spin_lock_irq (&card->lock);
|
|
|
|
/* stop any existing channel output */
|
|
via_chan_status_clear (chan->iobase);
|
|
via_chan_stop (chan->iobase);
|
|
via_chan_status_clear (chan->iobase);
|
|
|
|
spin_unlock_irq (&card->lock);
|
|
|
|
synchronize_irq(card->pdev->irq);
|
|
|
|
DPRINTK ("EXIT\n");
|
|
}
|
|
|
|
static void via_chan_buffer_free (struct via_info *card, struct via_channel *chan)
|
|
{
|
|
int i;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
/* zero location of DMA-able scatter-gather info table */
|
|
via_ac97_wait_idle(card);
|
|
outl (0, chan->iobase + VIA_PCM_TABLE_ADDR);
|
|
|
|
for (i = 0; i < chan->page_number; i++)
|
|
if (chan->pgtbl[i].cpuaddr) {
|
|
pci_free_consistent (card->pdev, PAGE_SIZE,
|
|
chan->pgtbl[i].cpuaddr,
|
|
chan->pgtbl[i].handle);
|
|
chan->pgtbl[i].cpuaddr = NULL;
|
|
chan->pgtbl[i].handle = 0;
|
|
}
|
|
|
|
chan->page_number = 0;
|
|
|
|
if (chan->sgtable) {
|
|
pci_free_consistent (card->pdev,
|
|
(sizeof (struct via_sgd_table) * chan->frag_number),
|
|
(void*)chan->sgtable, chan->sgt_handle);
|
|
chan->sgtable = NULL;
|
|
}
|
|
|
|
DPRINTK ("EXIT\n");
|
|
}
|
|
|
|
|
|
/**
|
|
* via_chan_pcm_fmt - Update PCM channel settings
|
|
* @chan: Channel to be updated
|
|
* @reset: Boolean. If non-zero, channel will be reset
|
|
* to 8-bit mono mode.
|
|
*
|
|
* Stores the settings of the current PCM format,
|
|
* 8-bit or 16-bit, and mono/stereo, into the
|
|
* hardware settings for the specified channel.
|
|
* If @reset is non-zero, the channel is reset
|
|
* to 8-bit mono mode. Otherwise, the channel
|
|
* is set to the values stored in the channel
|
|
* information struct @chan.
|
|
*/
|
|
|
|
static void via_chan_pcm_fmt (struct via_channel *chan, int reset)
|
|
{
|
|
DPRINTK ("ENTER, pcm_fmt=0x%02X, reset=%s\n",
|
|
chan->pcm_fmt, reset ? "yes" : "no");
|
|
|
|
assert (chan != NULL);
|
|
|
|
if (reset)
|
|
{
|
|
/* reset to 8-bit mono mode */
|
|
chan->pcm_fmt = 0;
|
|
chan->channels = 1;
|
|
}
|
|
|
|
/* enable interrupts on FLAG and EOL */
|
|
chan->pcm_fmt |= VIA_CHAN_TYPE_MASK;
|
|
|
|
/* if we are recording, enable recording fifo bit */
|
|
if (chan->is_record)
|
|
chan->pcm_fmt |= VIA_PCM_REC_FIFO;
|
|
/* set interrupt select bits where applicable (PCM in & out channels) */
|
|
if (!chan->is_record)
|
|
chan->pcm_fmt |= VIA_CHAN_TYPE_INT_SELECT;
|
|
|
|
DPRINTK("SET FMT - %02x %02x\n", chan->intmask , chan->is_multi);
|
|
|
|
if(chan->intmask)
|
|
{
|
|
u32 m;
|
|
|
|
/*
|
|
* Channel 0x4 is up to 6 x 16bit and has to be
|
|
* programmed differently
|
|
*/
|
|
|
|
if(chan->is_multi)
|
|
{
|
|
u8 c = 0;
|
|
|
|
/*
|
|
* Load the type bit for num channels
|
|
* and 8/16bit
|
|
*/
|
|
|
|
if(chan->pcm_fmt & VIA_PCM_FMT_16BIT)
|
|
c = 1 << 7;
|
|
if(chan->pcm_fmt & VIA_PCM_FMT_STEREO)
|
|
c |= (2<<4);
|
|
else
|
|
c |= (1<<4);
|
|
|
|
outb(c, chan->iobase + VIA_PCM_TYPE);
|
|
|
|
/*
|
|
* Set the channel steering
|
|
* Mono
|
|
* Channel 0 to slot 3
|
|
* Channel 0 to slot 4
|
|
* Stereo
|
|
* Channel 0 to slot 3
|
|
* Channel 1 to slot 4
|
|
*/
|
|
|
|
switch(chan->channels)
|
|
{
|
|
case 1:
|
|
outl(0xFF000000 | (1<<0) | (1<<4) , chan->iobase + VIA_PCM_STOPRATE);
|
|
break;
|
|
case 2:
|
|
outl(0xFF000000 | (1<<0) | (2<<4) , chan->iobase + VIA_PCM_STOPRATE);
|
|
break;
|
|
case 4:
|
|
outl(0xFF000000 | (1<<0) | (2<<4) | (3<<8) | (4<<12), chan->iobase + VIA_PCM_STOPRATE);
|
|
break;
|
|
case 6:
|
|
outl(0xFF000000 | (1<<0) | (2<<4) | (5<<8) | (6<<12) | (3<<16) | (4<<20), chan->iobase + VIA_PCM_STOPRATE);
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* New style, turn off channel volume
|
|
* control, set bits in the right register
|
|
*/
|
|
outb(0x0, chan->iobase + VIA_PCM_LEFTVOL);
|
|
outb(0x0, chan->iobase + VIA_PCM_RIGHTVOL);
|
|
|
|
m = inl(chan->iobase + VIA_PCM_STOPRATE);
|
|
m &= ~(3<<20);
|
|
if(chan->pcm_fmt & VIA_PCM_FMT_STEREO)
|
|
m |= (1 << 20);
|
|
if(chan->pcm_fmt & VIA_PCM_FMT_16BIT)
|
|
m |= (1 << 21);
|
|
outl(m, chan->iobase + VIA_PCM_STOPRATE);
|
|
}
|
|
}
|
|
else
|
|
outb (chan->pcm_fmt, chan->iobase + VIA_PCM_TYPE);
|
|
|
|
|
|
DPRINTK ("EXIT, pcm_fmt = 0x%02X, reg = 0x%02X\n",
|
|
chan->pcm_fmt,
|
|
inb (chan->iobase + VIA_PCM_TYPE));
|
|
}
|
|
|
|
|
|
/**
|
|
* via_chan_clear - Stop DMA channel operation, and reset pointers
|
|
* @card: the chip to accessed
|
|
* @chan: Channel to be cleared
|
|
*
|
|
* Call via_chan_stop to halt DMA operations, and then resets
|
|
* all software pointers which track DMA operation.
|
|
*/
|
|
|
|
static void via_chan_clear (struct via_info *card, struct via_channel *chan)
|
|
{
|
|
DPRINTK ("ENTER\n");
|
|
via_chan_stop (chan->iobase);
|
|
via_chan_buffer_free(card, chan);
|
|
chan->is_active = 0;
|
|
chan->is_mapped = 0;
|
|
chan->is_enabled = 1;
|
|
chan->slop_len = 0;
|
|
chan->sw_ptr = 0;
|
|
chan->n_irqs = 0;
|
|
atomic_set (&chan->hw_ptr, 0);
|
|
DPRINTK ("EXIT\n");
|
|
}
|
|
|
|
|
|
/**
|
|
* via_chan_set_speed - Set PCM sample rate for given channel
|
|
* @card: Private info for specified board
|
|
* @chan: Channel whose sample rate will be adjusted
|
|
* @val: New sample rate, in Khz
|
|
*
|
|
* Helper function for the %SNDCTL_DSP_SPEED ioctl. OSS semantics
|
|
* demand that all audio operations halt (if they are not already
|
|
* halted) when the %SNDCTL_DSP_SPEED is given.
|
|
*
|
|
* This function halts all audio operations for the given channel
|
|
* @chan, and then calls via_set_rate to set the audio hardware
|
|
* to the new rate.
|
|
*/
|
|
|
|
static int via_chan_set_speed (struct via_info *card,
|
|
struct via_channel *chan, int val)
|
|
{
|
|
DPRINTK ("ENTER, requested rate = %d\n", val);
|
|
|
|
via_chan_clear (card, chan);
|
|
|
|
val = via_set_rate (card->ac97, chan, val);
|
|
|
|
DPRINTK ("EXIT, returning %d\n", val);
|
|
return val;
|
|
}
|
|
|
|
|
|
/**
|
|
* via_chan_set_fmt - Set PCM sample size for given channel
|
|
* @card: Private info for specified board
|
|
* @chan: Channel whose sample size will be adjusted
|
|
* @val: New sample size, use the %AFMT_xxx constants
|
|
*
|
|
* Helper function for the %SNDCTL_DSP_SETFMT ioctl. OSS semantics
|
|
* demand that all audio operations halt (if they are not already
|
|
* halted) when the %SNDCTL_DSP_SETFMT is given.
|
|
*
|
|
* This function halts all audio operations for the given channel
|
|
* @chan, and then calls via_chan_pcm_fmt to set the audio hardware
|
|
* to the new sample size, either 8-bit or 16-bit.
|
|
*/
|
|
|
|
static int via_chan_set_fmt (struct via_info *card,
|
|
struct via_channel *chan, int val)
|
|
{
|
|
DPRINTK ("ENTER, val=%s\n",
|
|
val == AFMT_U8 ? "AFMT_U8" :
|
|
val == AFMT_S16_LE ? "AFMT_S16_LE" :
|
|
"unknown");
|
|
|
|
via_chan_clear (card, chan);
|
|
|
|
assert (val != AFMT_QUERY); /* this case is handled elsewhere */
|
|
|
|
switch (val) {
|
|
case AFMT_S16_LE:
|
|
if ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) == 0) {
|
|
chan->pcm_fmt |= VIA_PCM_FMT_16BIT;
|
|
via_chan_pcm_fmt (chan, 0);
|
|
}
|
|
break;
|
|
|
|
case AFMT_U8:
|
|
if (chan->pcm_fmt & VIA_PCM_FMT_16BIT) {
|
|
chan->pcm_fmt &= ~VIA_PCM_FMT_16BIT;
|
|
via_chan_pcm_fmt (chan, 0);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
DPRINTK ("unknown AFMT: 0x%X\n", val);
|
|
val = AFMT_S16_LE;
|
|
}
|
|
|
|
DPRINTK ("EXIT\n");
|
|
return val;
|
|
}
|
|
|
|
|
|
/**
|
|
* via_chan_set_stereo - Enable or disable stereo for a DMA channel
|
|
* @card: Private info for specified board
|
|
* @chan: Channel whose stereo setting will be adjusted
|
|
* @val: New sample size, use the %AFMT_xxx constants
|
|
*
|
|
* Helper function for the %SNDCTL_DSP_CHANNELS and %SNDCTL_DSP_STEREO ioctls. OSS semantics
|
|
* demand that all audio operations halt (if they are not already
|
|
* halted) when %SNDCTL_DSP_CHANNELS or SNDCTL_DSP_STEREO is given.
|
|
*
|
|
* This function halts all audio operations for the given channel
|
|
* @chan, and then calls via_chan_pcm_fmt to set the audio hardware
|
|
* to enable or disable stereo.
|
|
*/
|
|
|
|
static int via_chan_set_stereo (struct via_info *card,
|
|
struct via_channel *chan, int val)
|
|
{
|
|
DPRINTK ("ENTER, channels = %d\n", val);
|
|
|
|
via_chan_clear (card, chan);
|
|
|
|
switch (val) {
|
|
|
|
/* mono */
|
|
case 1:
|
|
chan->pcm_fmt &= ~VIA_PCM_FMT_STEREO;
|
|
chan->channels = 1;
|
|
via_chan_pcm_fmt (chan, 0);
|
|
break;
|
|
|
|
/* stereo */
|
|
case 2:
|
|
chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
|
|
chan->channels = 2;
|
|
via_chan_pcm_fmt (chan, 0);
|
|
break;
|
|
|
|
case 4:
|
|
case 6:
|
|
if(chan->is_multi)
|
|
{
|
|
chan->pcm_fmt |= VIA_PCM_FMT_STEREO;
|
|
chan->channels = val;
|
|
break;
|
|
}
|
|
/* unknown */
|
|
default:
|
|
val = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
DPRINTK ("EXIT, returning %d\n", val);
|
|
return val;
|
|
}
|
|
|
|
static int via_chan_set_buffering (struct via_info *card,
|
|
struct via_channel *chan, int val)
|
|
{
|
|
int shift;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
/* in both cases the buffer cannot be changed */
|
|
if (chan->is_active || chan->is_mapped) {
|
|
DPRINTK ("EXIT\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* called outside SETFRAGMENT */
|
|
/* set defaults or do nothing */
|
|
if (val < 0) {
|
|
|
|
if (chan->frag_size && chan->frag_number)
|
|
goto out;
|
|
|
|
DPRINTK ("\n");
|
|
|
|
chan->frag_size = (VIA_DEFAULT_FRAG_TIME * chan->rate * chan->channels
|
|
* ((chan->pcm_fmt & VIA_PCM_FMT_16BIT) ? 2 : 1)) / 1000 - 1;
|
|
|
|
shift = 0;
|
|
while (chan->frag_size) {
|
|
chan->frag_size >>= 1;
|
|
shift++;
|
|
}
|
|
chan->frag_size = 1 << shift;
|
|
|
|
chan->frag_number = (VIA_DEFAULT_BUFFER_TIME / VIA_DEFAULT_FRAG_TIME);
|
|
|
|
DPRINTK ("setting default values %d %d\n", chan->frag_size, chan->frag_number);
|
|
} else {
|
|
chan->frag_size = 1 << (val & 0xFFFF);
|
|
chan->frag_number = (val >> 16) & 0xFFFF;
|
|
|
|
DPRINTK ("using user values %d %d\n", chan->frag_size, chan->frag_number);
|
|
}
|
|
|
|
/* quake3 wants frag_number to be a power of two */
|
|
shift = 0;
|
|
while (chan->frag_number) {
|
|
chan->frag_number >>= 1;
|
|
shift++;
|
|
}
|
|
chan->frag_number = 1 << shift;
|
|
|
|
if (chan->frag_size > VIA_MAX_FRAG_SIZE)
|
|
chan->frag_size = VIA_MAX_FRAG_SIZE;
|
|
else if (chan->frag_size < VIA_MIN_FRAG_SIZE)
|
|
chan->frag_size = VIA_MIN_FRAG_SIZE;
|
|
|
|
if (chan->frag_number < VIA_MIN_FRAG_NUMBER)
|
|
chan->frag_number = VIA_MIN_FRAG_NUMBER;
|
|
if (chan->frag_number > VIA_MAX_FRAG_NUMBER)
|
|
chan->frag_number = VIA_MAX_FRAG_NUMBER;
|
|
|
|
if ((chan->frag_number * chan->frag_size) / PAGE_SIZE > VIA_MAX_BUFFER_DMA_PAGES)
|
|
chan->frag_number = (VIA_MAX_BUFFER_DMA_PAGES * PAGE_SIZE) / chan->frag_size;
|
|
|
|
out:
|
|
if (chan->is_record)
|
|
atomic_set (&chan->n_frags, 0);
|
|
else
|
|
atomic_set (&chan->n_frags, chan->frag_number);
|
|
|
|
DPRINTK ("EXIT\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef VIA_CHAN_DUMP_BUFS
|
|
/**
|
|
* via_chan_dump_bufs - Display DMA table contents
|
|
* @chan: Channel whose DMA table will be displayed
|
|
*
|
|
* Debugging function which displays the contents of the
|
|
* scatter-gather DMA table for the given channel @chan.
|
|
*/
|
|
|
|
static void via_chan_dump_bufs (struct via_channel *chan)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < chan->frag_number; i++) {
|
|
DPRINTK ("#%02d: addr=%x, count=%u, flag=%d, eol=%d\n",
|
|
i, chan->sgtable[i].addr,
|
|
chan->sgtable[i].count & 0x00FFFFFF,
|
|
chan->sgtable[i].count & VIA_FLAG ? 1 : 0,
|
|
chan->sgtable[i].count & VIA_EOL ? 1 : 0);
|
|
}
|
|
DPRINTK ("buf_in_use = %d, nextbuf = %d\n",
|
|
atomic_read (&chan->buf_in_use),
|
|
atomic_read (&chan->sw_ptr));
|
|
}
|
|
#endif /* VIA_CHAN_DUMP_BUFS */
|
|
|
|
|
|
/**
|
|
* via_chan_flush_frag - Flush partially-full playback buffer to hardware
|
|
* @chan: Channel whose DMA table will be flushed
|
|
*
|
|
* Flushes partially-full playback buffer to hardware.
|
|
*/
|
|
|
|
static void via_chan_flush_frag (struct via_channel *chan)
|
|
{
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (chan->slop_len > 0);
|
|
|
|
if (chan->sw_ptr == (chan->frag_number - 1))
|
|
chan->sw_ptr = 0;
|
|
else
|
|
chan->sw_ptr++;
|
|
|
|
chan->slop_len = 0;
|
|
|
|
assert (atomic_read (&chan->n_frags) > 0);
|
|
atomic_dec (&chan->n_frags);
|
|
|
|
DPRINTK ("EXIT\n");
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* via_chan_maybe_start - Initiate audio hardware DMA operation
|
|
* @chan: Channel whose DMA is to be started
|
|
*
|
|
* Initiate DMA operation, if the DMA engine for the given
|
|
* channel @chan is not already active.
|
|
*/
|
|
|
|
static inline void via_chan_maybe_start (struct via_channel *chan)
|
|
{
|
|
assert (chan->is_active == sg_active(chan->iobase));
|
|
|
|
DPRINTK ("MAYBE START %s\n", chan->name);
|
|
if (!chan->is_active && chan->is_enabled) {
|
|
chan->is_active = 1;
|
|
sg_begin (chan);
|
|
DPRINTK ("starting channel %s\n", chan->name);
|
|
}
|
|
}
|
|
|
|
|
|
/****************************************************************
|
|
*
|
|
* Interface to ac97-codec module
|
|
*
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* via_ac97_wait_idle - Wait until AC97 codec is not busy
|
|
* @card: Private info for specified board
|
|
*
|
|
* Sleep until the AC97 codec is no longer busy.
|
|
* Returns the final value read from the SGD
|
|
* register being polled.
|
|
*/
|
|
|
|
static u8 via_ac97_wait_idle (struct via_info *card)
|
|
{
|
|
u8 tmp8;
|
|
int counter = VIA_COUNTER_LIMIT;
|
|
|
|
DPRINTK ("ENTER/EXIT\n");
|
|
|
|
assert (card != NULL);
|
|
assert (card->pdev != NULL);
|
|
|
|
do {
|
|
udelay (15);
|
|
|
|
tmp8 = inb (card->baseaddr + 0x83);
|
|
} while ((tmp8 & VIA_CR83_BUSY) && (counter-- > 0));
|
|
|
|
if (tmp8 & VIA_CR83_BUSY)
|
|
printk (KERN_WARNING PFX "timeout waiting on AC97 codec\n");
|
|
return tmp8;
|
|
}
|
|
|
|
|
|
/**
|
|
* via_ac97_read_reg - Read AC97 standard register
|
|
* @codec: Pointer to generic AC97 codec info
|
|
* @reg: Index of AC97 register to be read
|
|
*
|
|
* Read the value of a single AC97 codec register,
|
|
* as defined by the Intel AC97 specification.
|
|
*
|
|
* Defines the standard AC97 read-register operation
|
|
* required by the kernel's ac97_codec interface.
|
|
*
|
|
* Returns the 16-bit value stored in the specified
|
|
* register.
|
|
*/
|
|
|
|
static u16 via_ac97_read_reg (struct ac97_codec *codec, u8 reg)
|
|
{
|
|
unsigned long data;
|
|
struct via_info *card;
|
|
int counter;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (codec != NULL);
|
|
assert (codec->private_data != NULL);
|
|
|
|
card = codec->private_data;
|
|
|
|
spin_lock(&card->ac97_lock);
|
|
|
|
/* Every time we write to register 80 we cause a transaction.
|
|
The only safe way to clear the valid bit is to write it at
|
|
the same time as the command */
|
|
data = (reg << 16) | VIA_CR80_READ | VIA_CR80_VALID;
|
|
|
|
outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
|
|
udelay (20);
|
|
|
|
for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
|
|
udelay (1);
|
|
if ((((data = inl(card->baseaddr + VIA_BASE0_AC97_CTRL)) &
|
|
(VIA_CR80_VALID|VIA_CR80_BUSY)) == VIA_CR80_VALID))
|
|
goto out;
|
|
}
|
|
|
|
printk (KERN_WARNING PFX "timeout while reading AC97 codec (0x%lX)\n", data);
|
|
goto err_out;
|
|
|
|
out:
|
|
/* Once the valid bit has become set, we must wait a complete AC97
|
|
frame before the data has settled. */
|
|
udelay(25);
|
|
data = (unsigned long) inl (card->baseaddr + VIA_BASE0_AC97_CTRL);
|
|
|
|
outb (0x02, card->baseaddr + 0x83);
|
|
|
|
if (((data & 0x007F0000) >> 16) == reg) {
|
|
DPRINTK ("EXIT, success, data=0x%lx, retval=0x%lx\n",
|
|
data, data & 0x0000FFFF);
|
|
spin_unlock(&card->ac97_lock);
|
|
return data & 0x0000FFFF;
|
|
}
|
|
|
|
printk (KERN_WARNING "via82cxxx_audio: not our index: reg=0x%x, newreg=0x%lx\n",
|
|
reg, ((data & 0x007F0000) >> 16));
|
|
|
|
err_out:
|
|
spin_unlock(&card->ac97_lock);
|
|
DPRINTK ("EXIT, returning 0\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* via_ac97_write_reg - Write AC97 standard register
|
|
* @codec: Pointer to generic AC97 codec info
|
|
* @reg: Index of AC97 register to be written
|
|
* @value: Value to be written to AC97 register
|
|
*
|
|
* Write the value of a single AC97 codec register,
|
|
* as defined by the Intel AC97 specification.
|
|
*
|
|
* Defines the standard AC97 write-register operation
|
|
* required by the kernel's ac97_codec interface.
|
|
*/
|
|
|
|
static void via_ac97_write_reg (struct ac97_codec *codec, u8 reg, u16 value)
|
|
{
|
|
u32 data;
|
|
struct via_info *card;
|
|
int counter;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (codec != NULL);
|
|
assert (codec->private_data != NULL);
|
|
|
|
card = codec->private_data;
|
|
|
|
spin_lock(&card->ac97_lock);
|
|
|
|
data = (reg << 16) + value;
|
|
outl (data, card->baseaddr + VIA_BASE0_AC97_CTRL);
|
|
udelay (10);
|
|
|
|
for (counter = VIA_COUNTER_LIMIT; counter > 0; counter--) {
|
|
if ((inb (card->baseaddr + 0x83) & VIA_CR83_BUSY) == 0)
|
|
goto out;
|
|
|
|
udelay (15);
|
|
}
|
|
|
|
printk (KERN_WARNING PFX "timeout after AC97 codec write (0x%X, 0x%X)\n", reg, value);
|
|
|
|
out:
|
|
spin_unlock(&card->ac97_lock);
|
|
DPRINTK ("EXIT\n");
|
|
}
|
|
|
|
|
|
static int via_mixer_open (struct inode *inode, struct file *file)
|
|
{
|
|
int minor = iminor(inode);
|
|
struct via_info *card;
|
|
struct pci_dev *pdev = NULL;
|
|
struct pci_driver *drvr;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
|
|
drvr = pci_dev_driver (pdev);
|
|
if (drvr == &via_driver) {
|
|
assert (pci_get_drvdata (pdev) != NULL);
|
|
|
|
card = pci_get_drvdata (pdev);
|
|
if (card->ac97->dev_mixer == minor)
|
|
goto match;
|
|
}
|
|
}
|
|
|
|
DPRINTK ("EXIT, returning -ENODEV\n");
|
|
return -ENODEV;
|
|
|
|
match:
|
|
pci_dev_put(pdev);
|
|
file->private_data = card->ac97;
|
|
|
|
DPRINTK ("EXIT, returning 0\n");
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static int via_mixer_ioctl (struct inode *inode, struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct ac97_codec *codec = file->private_data;
|
|
struct via_info *card;
|
|
int nonblock = (file->f_flags & O_NONBLOCK);
|
|
int rc;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (codec != NULL);
|
|
card = codec->private_data;
|
|
assert (card != NULL);
|
|
|
|
rc = via_syscall_down (card, nonblock);
|
|
if (rc) goto out;
|
|
|
|
#if 0
|
|
/*
|
|
* Intercept volume control on 8233 and 8235
|
|
*/
|
|
if(card->volume)
|
|
{
|
|
switch(cmd)
|
|
{
|
|
case SOUND_MIXER_READ_VOLUME:
|
|
return card->mixer_vol;
|
|
case SOUND_MIXER_WRITE_VOLUME:
|
|
{
|
|
int v;
|
|
if(get_user(v, (int *)arg))
|
|
{
|
|
rc = -EFAULT;
|
|
goto out;
|
|
}
|
|
card->mixer_vol = v;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
rc = codec->mixer_ioctl(codec, cmd, arg);
|
|
|
|
mutex_unlock(&card->syscall_mutex);
|
|
|
|
out:
|
|
DPRINTK ("EXIT, returning %d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
|
|
static struct file_operations via_mixer_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = via_mixer_open,
|
|
.llseek = no_llseek,
|
|
.ioctl = via_mixer_ioctl,
|
|
};
|
|
|
|
|
|
static int __devinit via_ac97_reset (struct via_info *card)
|
|
{
|
|
struct pci_dev *pdev = card->pdev;
|
|
u8 tmp8;
|
|
u16 tmp16;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (pdev != NULL);
|
|
|
|
#ifndef NDEBUG
|
|
{
|
|
u8 r40,r41,r42,r43,r44,r48;
|
|
pci_read_config_byte (card->pdev, 0x40, &r40);
|
|
pci_read_config_byte (card->pdev, 0x41, &r41);
|
|
pci_read_config_byte (card->pdev, 0x42, &r42);
|
|
pci_read_config_byte (card->pdev, 0x43, &r43);
|
|
pci_read_config_byte (card->pdev, 0x44, &r44);
|
|
pci_read_config_byte (card->pdev, 0x48, &r48);
|
|
DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
|
|
r40,r41,r42,r43,r44,r48);
|
|
|
|
spin_lock_irq (&card->lock);
|
|
DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
|
|
inb (card->baseaddr + 0x00),
|
|
inb (card->baseaddr + 0x01),
|
|
inb (card->baseaddr + 0x02),
|
|
inl (card->baseaddr + 0x04),
|
|
inl (card->baseaddr + 0x0C),
|
|
inl (card->baseaddr + 0x80),
|
|
inl (card->baseaddr + 0x84));
|
|
spin_unlock_irq (&card->lock);
|
|
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Reset AC97 controller: enable, disable, enable,
|
|
* pausing after each command for good luck. Only
|
|
* do this if the codec is not ready, because it causes
|
|
* loud pops and such due to such a hard codec reset.
|
|
*/
|
|
pci_read_config_byte (pdev, VIA_ACLINK_STATUS, &tmp8);
|
|
if ((tmp8 & VIA_CR40_AC97_READY) == 0) {
|
|
pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
|
|
VIA_CR41_AC97_ENABLE |
|
|
VIA_CR41_AC97_RESET |
|
|
VIA_CR41_AC97_WAKEUP);
|
|
udelay (100);
|
|
|
|
pci_write_config_byte (pdev, VIA_ACLINK_CTRL, 0);
|
|
udelay (100);
|
|
|
|
pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
|
|
VIA_CR41_AC97_ENABLE |
|
|
VIA_CR41_PCM_ENABLE |
|
|
VIA_CR41_VRA | VIA_CR41_AC97_RESET);
|
|
udelay (100);
|
|
}
|
|
|
|
/* Make sure VRA is enabled, in case we didn't do a
|
|
* complete codec reset, above
|
|
*/
|
|
pci_read_config_byte (pdev, VIA_ACLINK_CTRL, &tmp8);
|
|
if (((tmp8 & VIA_CR41_VRA) == 0) ||
|
|
((tmp8 & VIA_CR41_AC97_ENABLE) == 0) ||
|
|
((tmp8 & VIA_CR41_PCM_ENABLE) == 0) ||
|
|
((tmp8 & VIA_CR41_AC97_RESET) == 0)) {
|
|
pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
|
|
VIA_CR41_AC97_ENABLE |
|
|
VIA_CR41_PCM_ENABLE |
|
|
VIA_CR41_VRA | VIA_CR41_AC97_RESET);
|
|
udelay (100);
|
|
}
|
|
|
|
if(card->legacy)
|
|
{
|
|
#if 0 /* this breaks on K7M */
|
|
/* disable legacy stuff */
|
|
pci_write_config_byte (pdev, 0x42, 0x00);
|
|
udelay(10);
|
|
#endif
|
|
|
|
/* route FM trap to IRQ, disable FM trap */
|
|
pci_write_config_byte (pdev, 0x48, 0x05);
|
|
udelay(10);
|
|
}
|
|
|
|
/* disable all codec GPI interrupts */
|
|
outl (0, pci_resource_start (pdev, 0) + 0x8C);
|
|
|
|
/* WARNING: this line is magic. Remove this
|
|
* and things break. */
|
|
/* enable variable rate */
|
|
tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
|
|
if ((tmp16 & 1) == 0)
|
|
via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
|
|
|
|
DPRINTK ("EXIT, returning 0\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void via_ac97_codec_wait (struct ac97_codec *codec)
|
|
{
|
|
assert (codec->private_data != NULL);
|
|
via_ac97_wait_idle (codec->private_data);
|
|
}
|
|
|
|
|
|
static int __devinit via_ac97_init (struct via_info *card)
|
|
{
|
|
int rc;
|
|
u16 tmp16;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (card != NULL);
|
|
|
|
card->ac97 = ac97_alloc_codec();
|
|
if(card->ac97 == NULL)
|
|
return -ENOMEM;
|
|
|
|
card->ac97->private_data = card;
|
|
card->ac97->codec_read = via_ac97_read_reg;
|
|
card->ac97->codec_write = via_ac97_write_reg;
|
|
card->ac97->codec_wait = via_ac97_codec_wait;
|
|
|
|
card->ac97->dev_mixer = register_sound_mixer (&via_mixer_fops, -1);
|
|
if (card->ac97->dev_mixer < 0) {
|
|
printk (KERN_ERR PFX "unable to register AC97 mixer, aborting\n");
|
|
DPRINTK ("EXIT, returning -EIO\n");
|
|
ac97_release_codec(card->ac97);
|
|
return -EIO;
|
|
}
|
|
|
|
rc = via_ac97_reset (card);
|
|
if (rc) {
|
|
printk (KERN_ERR PFX "unable to reset AC97 codec, aborting\n");
|
|
goto err_out;
|
|
}
|
|
|
|
mdelay(10);
|
|
|
|
if (ac97_probe_codec (card->ac97) == 0) {
|
|
printk (KERN_ERR PFX "unable to probe AC97 codec, aborting\n");
|
|
rc = -EIO;
|
|
goto err_out;
|
|
}
|
|
|
|
/* enable variable rate */
|
|
tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
|
|
via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
|
|
|
|
/*
|
|
* If we cannot enable VRA, we have a locked-rate codec.
|
|
* We try again to enable VRA before assuming so, however.
|
|
*/
|
|
tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
|
|
if ((tmp16 & 1) == 0) {
|
|
via_ac97_write_reg (card->ac97, AC97_EXTENDED_STATUS, tmp16 | 1);
|
|
tmp16 = via_ac97_read_reg (card->ac97, AC97_EXTENDED_STATUS);
|
|
if ((tmp16 & 1) == 0) {
|
|
card->locked_rate = 1;
|
|
printk (KERN_WARNING PFX "Codec rate locked at 48Khz\n");
|
|
}
|
|
}
|
|
|
|
DPRINTK ("EXIT, returning 0\n");
|
|
return 0;
|
|
|
|
err_out:
|
|
unregister_sound_mixer (card->ac97->dev_mixer);
|
|
DPRINTK ("EXIT, returning %d\n", rc);
|
|
ac97_release_codec(card->ac97);
|
|
return rc;
|
|
}
|
|
|
|
|
|
static void via_ac97_cleanup (struct via_info *card)
|
|
{
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (card != NULL);
|
|
assert (card->ac97->dev_mixer >= 0);
|
|
|
|
unregister_sound_mixer (card->ac97->dev_mixer);
|
|
ac97_release_codec(card->ac97);
|
|
|
|
DPRINTK ("EXIT\n");
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************
|
|
*
|
|
* Interrupt-related code
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* via_intr_channel - handle an interrupt for a single channel
|
|
* @card: unused
|
|
* @chan: handle interrupt for this channel
|
|
*
|
|
* This is the "meat" of the interrupt handler,
|
|
* containing the actions taken each time an interrupt
|
|
* occurs. All communication and coordination with
|
|
* userspace takes place here.
|
|
*
|
|
* Locking: inside card->lock
|
|
*/
|
|
|
|
static void via_intr_channel (struct via_info *card, struct via_channel *chan)
|
|
{
|
|
u8 status;
|
|
int n;
|
|
|
|
/* check pertinent bits of status register for action bits */
|
|
status = inb (chan->iobase) & (VIA_SGD_FLAG | VIA_SGD_EOL | VIA_SGD_STOPPED);
|
|
if (!status)
|
|
return;
|
|
|
|
/* acknowledge any flagged bits ASAP */
|
|
outb (status, chan->iobase);
|
|
|
|
if (!chan->sgtable) /* XXX: temporary solution */
|
|
return;
|
|
|
|
/* grab current h/w ptr value */
|
|
n = atomic_read (&chan->hw_ptr);
|
|
|
|
/* sanity check: make sure our h/w ptr doesn't have a weird value */
|
|
assert (n >= 0);
|
|
assert (n < chan->frag_number);
|
|
|
|
|
|
/* reset SGD data structure in memory to reflect a full buffer,
|
|
* and advance the h/w ptr, wrapping around to zero if needed
|
|
*/
|
|
if (n == (chan->frag_number - 1)) {
|
|
chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_EOL);
|
|
atomic_set (&chan->hw_ptr, 0);
|
|
} else {
|
|
chan->sgtable[n].count = cpu_to_le32(chan->frag_size | VIA_FLAG);
|
|
atomic_inc (&chan->hw_ptr);
|
|
}
|
|
|
|
/* accounting crap for SNDCTL_DSP_GETxPTR */
|
|
chan->n_irqs++;
|
|
chan->bytes += chan->frag_size;
|
|
/* FIXME - signed overflow is undefined */
|
|
if (chan->bytes < 0) /* handle overflow of 31-bit value */
|
|
chan->bytes = chan->frag_size;
|
|
/* all following checks only occur when not in mmap(2) mode */
|
|
if (!chan->is_mapped)
|
|
{
|
|
/* If we are recording, then n_frags represents the number
|
|
* of fragments waiting to be handled by userspace.
|
|
* If we are playback, then n_frags represents the number
|
|
* of fragments remaining to be filled by userspace.
|
|
* We increment here. If we reach max number of fragments,
|
|
* this indicates an underrun/overrun. For this case under OSS,
|
|
* we stop the record/playback process.
|
|
*/
|
|
if (atomic_read (&chan->n_frags) < chan->frag_number)
|
|
atomic_inc (&chan->n_frags);
|
|
assert (atomic_read (&chan->n_frags) <= chan->frag_number);
|
|
if (atomic_read (&chan->n_frags) == chan->frag_number) {
|
|
chan->is_active = 0;
|
|
via_chan_stop (chan->iobase);
|
|
}
|
|
}
|
|
/* wake up anyone listening to see when interrupts occur */
|
|
wake_up_all (&chan->wait);
|
|
|
|
DPRINTK ("%s intr, status=0x%02X, hwptr=0x%lX, chan->hw_ptr=%d\n",
|
|
chan->name, status, (long) inl (chan->iobase + 0x04),
|
|
atomic_read (&chan->hw_ptr));
|
|
|
|
DPRINTK ("%s intr, channel n_frags == %d, missed %d\n", chan->name,
|
|
atomic_read (&chan->n_frags), missed);
|
|
}
|
|
|
|
|
|
static irqreturn_t via_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct via_info *card = dev_id;
|
|
u32 status32;
|
|
|
|
/* to minimize interrupt sharing costs, we use the SGD status
|
|
* shadow register to check the status of all inputs and
|
|
* outputs with a single 32-bit bus read. If no interrupt
|
|
* conditions are flagged, we exit immediately
|
|
*/
|
|
status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
|
|
if (!(status32 & VIA_INTR_MASK))
|
|
{
|
|
#ifdef CONFIG_MIDI_VIA82CXXX
|
|
if (card->midi_devc)
|
|
uart401intr(irq, card->midi_devc);
|
|
#endif
|
|
return IRQ_HANDLED;
|
|
}
|
|
DPRINTK ("intr, status32 == 0x%08X\n", status32);
|
|
|
|
/* synchronize interrupt handling under SMP. this spinlock
|
|
* goes away completely on UP
|
|
*/
|
|
spin_lock (&card->lock);
|
|
|
|
if (status32 & VIA_INTR_OUT)
|
|
via_intr_channel (card, &card->ch_out);
|
|
if (status32 & VIA_INTR_IN)
|
|
via_intr_channel (card, &card->ch_in);
|
|
if (status32 & VIA_INTR_FM)
|
|
via_intr_channel (card, &card->ch_fm);
|
|
|
|
spin_unlock (&card->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t via_new_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct via_info *card = dev_id;
|
|
u32 status32;
|
|
|
|
/* to minimize interrupt sharing costs, we use the SGD status
|
|
* shadow register to check the status of all inputs and
|
|
* outputs with a single 32-bit bus read. If no interrupt
|
|
* conditions are flagged, we exit immediately
|
|
*/
|
|
status32 = inl (card->baseaddr + VIA_BASE0_SGD_STATUS_SHADOW);
|
|
if (!(status32 & VIA_NEW_INTR_MASK))
|
|
return IRQ_NONE;
|
|
/*
|
|
* goes away completely on UP
|
|
*/
|
|
spin_lock (&card->lock);
|
|
|
|
via_intr_channel (card, &card->ch_out);
|
|
via_intr_channel (card, &card->ch_in);
|
|
via_intr_channel (card, &card->ch_fm);
|
|
|
|
spin_unlock (&card->lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
/**
|
|
* via_interrupt_init - Initialize interrupt handling
|
|
* @card: Private info for specified board
|
|
*
|
|
* Obtain and reserve IRQ for using in handling audio events.
|
|
* Also, disable any IRQ-generating resources, to make sure
|
|
* we don't get interrupts before we want them.
|
|
*/
|
|
|
|
static int via_interrupt_init (struct via_info *card)
|
|
{
|
|
u8 tmp8;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (card != NULL);
|
|
assert (card->pdev != NULL);
|
|
|
|
/* check for sane IRQ number. can this ever happen? */
|
|
if (card->pdev->irq < 2) {
|
|
printk (KERN_ERR PFX "insane IRQ %d, aborting\n",
|
|
card->pdev->irq);
|
|
DPRINTK ("EXIT, returning -EIO\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/* VIA requires this is done */
|
|
pci_write_config_byte(card->pdev, PCI_INTERRUPT_LINE, card->pdev->irq);
|
|
|
|
if(card->legacy)
|
|
{
|
|
/* make sure FM irq is not routed to us */
|
|
pci_read_config_byte (card->pdev, VIA_FM_NMI_CTRL, &tmp8);
|
|
if ((tmp8 & VIA_CR48_FM_TRAP_TO_NMI) == 0) {
|
|
tmp8 |= VIA_CR48_FM_TRAP_TO_NMI;
|
|
pci_write_config_byte (card->pdev, VIA_FM_NMI_CTRL, tmp8);
|
|
}
|
|
if (request_irq (card->pdev->irq, via_interrupt, IRQF_SHARED, VIA_MODULE_NAME, card)) {
|
|
printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
|
|
card->pdev->irq);
|
|
DPRINTK ("EXIT, returning -EBUSY\n");
|
|
return -EBUSY;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (request_irq (card->pdev->irq, via_new_interrupt, IRQF_SHARED, VIA_MODULE_NAME, card)) {
|
|
printk (KERN_ERR PFX "unable to obtain IRQ %d, aborting\n",
|
|
card->pdev->irq);
|
|
DPRINTK ("EXIT, returning -EBUSY\n");
|
|
return -EBUSY;
|
|
}
|
|
}
|
|
|
|
DPRINTK ("EXIT, returning 0\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
/****************************************************************
|
|
*
|
|
* OSS DSP device
|
|
*
|
|
*/
|
|
|
|
static struct file_operations via_dsp_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = via_dsp_open,
|
|
.release = via_dsp_release,
|
|
.read = via_dsp_read,
|
|
.write = via_dsp_write,
|
|
.poll = via_dsp_poll,
|
|
.llseek = no_llseek,
|
|
.ioctl = via_dsp_ioctl,
|
|
.mmap = via_dsp_mmap,
|
|
};
|
|
|
|
|
|
static int __devinit via_dsp_init (struct via_info *card)
|
|
{
|
|
u8 tmp8;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (card != NULL);
|
|
|
|
if(card->legacy)
|
|
{
|
|
/* turn off legacy features, if not already */
|
|
pci_read_config_byte (card->pdev, VIA_FUNC_ENABLE, &tmp8);
|
|
if (tmp8 & (VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE)) {
|
|
tmp8 &= ~(VIA_CR42_SB_ENABLE | VIA_CR42_FM_ENABLE);
|
|
pci_write_config_byte (card->pdev, VIA_FUNC_ENABLE, tmp8);
|
|
}
|
|
}
|
|
|
|
via_stop_everything (card);
|
|
|
|
card->dev_dsp = register_sound_dsp (&via_dsp_fops, -1);
|
|
if (card->dev_dsp < 0) {
|
|
DPRINTK ("EXIT, returning -ENODEV\n");
|
|
return -ENODEV;
|
|
}
|
|
DPRINTK ("EXIT, returning 0\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void via_dsp_cleanup (struct via_info *card)
|
|
{
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (card != NULL);
|
|
assert (card->dev_dsp >= 0);
|
|
|
|
via_stop_everything (card);
|
|
|
|
unregister_sound_dsp (card->dev_dsp);
|
|
|
|
DPRINTK ("EXIT\n");
|
|
}
|
|
|
|
|
|
static struct page * via_mm_nopage (struct vm_area_struct * vma,
|
|
unsigned long address, int *type)
|
|
{
|
|
struct via_info *card = vma->vm_private_data;
|
|
struct via_channel *chan = &card->ch_out;
|
|
struct page *dmapage;
|
|
unsigned long pgoff;
|
|
int rd, wr;
|
|
|
|
DPRINTK ("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n",
|
|
vma->vm_start,
|
|
address - vma->vm_start,
|
|
(address - vma->vm_start) >> PAGE_SHIFT,
|
|
address);
|
|
|
|
if (address > vma->vm_end) {
|
|
DPRINTK ("EXIT, returning NOPAGE_SIGBUS\n");
|
|
return NOPAGE_SIGBUS; /* Disallow mremap */
|
|
}
|
|
if (!card) {
|
|
DPRINTK ("EXIT, returning NOPAGE_OOM\n");
|
|
return NOPAGE_OOM; /* Nothing allocated */
|
|
}
|
|
|
|
pgoff = vma->vm_pgoff + ((address - vma->vm_start) >> PAGE_SHIFT);
|
|
rd = card->ch_in.is_mapped;
|
|
wr = card->ch_out.is_mapped;
|
|
|
|
#ifndef VIA_NDEBUG
|
|
{
|
|
unsigned long max_bufs = chan->frag_number;
|
|
if (rd && wr) max_bufs *= 2;
|
|
/* via_dsp_mmap() should ensure this */
|
|
assert (pgoff < max_bufs);
|
|
}
|
|
#endif
|
|
|
|
/* if full-duplex (read+write) and we have two sets of bufs,
|
|
* then the playback buffers come first, sez soundcard.c */
|
|
if (pgoff >= chan->page_number) {
|
|
pgoff -= chan->page_number;
|
|
chan = &card->ch_in;
|
|
} else if (!wr)
|
|
chan = &card->ch_in;
|
|
|
|
assert ((((unsigned long)chan->pgtbl[pgoff].cpuaddr) % PAGE_SIZE) == 0);
|
|
|
|
dmapage = virt_to_page (chan->pgtbl[pgoff].cpuaddr);
|
|
DPRINTK ("EXIT, returning page %p for cpuaddr %lXh\n",
|
|
dmapage, (unsigned long) chan->pgtbl[pgoff].cpuaddr);
|
|
get_page (dmapage);
|
|
if (type)
|
|
*type = VM_FAULT_MINOR;
|
|
return dmapage;
|
|
}
|
|
|
|
|
|
#ifndef VM_RESERVED
|
|
static int via_mm_swapout (struct page *page, struct file *filp)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* VM_RESERVED */
|
|
|
|
|
|
static struct vm_operations_struct via_mm_ops = {
|
|
.nopage = via_mm_nopage,
|
|
|
|
#ifndef VM_RESERVED
|
|
.swapout = via_mm_swapout,
|
|
#endif
|
|
};
|
|
|
|
|
|
static int via_dsp_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
struct via_info *card;
|
|
int nonblock = (file->f_flags & O_NONBLOCK);
|
|
int rc = -EINVAL, rd=0, wr=0;
|
|
unsigned long max_size, size, start, offset;
|
|
|
|
assert (file != NULL);
|
|
assert (vma != NULL);
|
|
card = file->private_data;
|
|
assert (card != NULL);
|
|
|
|
DPRINTK ("ENTER, start %lXh, size %ld, pgoff %ld\n",
|
|
vma->vm_start,
|
|
vma->vm_end - vma->vm_start,
|
|
vma->vm_pgoff);
|
|
|
|
max_size = 0;
|
|
if (vma->vm_flags & VM_READ) {
|
|
rd = 1;
|
|
via_chan_set_buffering(card, &card->ch_in, -1);
|
|
via_chan_buffer_init (card, &card->ch_in);
|
|
max_size += card->ch_in.page_number << PAGE_SHIFT;
|
|
}
|
|
if (vma->vm_flags & VM_WRITE) {
|
|
wr = 1;
|
|
via_chan_set_buffering(card, &card->ch_out, -1);
|
|
via_chan_buffer_init (card, &card->ch_out);
|
|
max_size += card->ch_out.page_number << PAGE_SHIFT;
|
|
}
|
|
|
|
start = vma->vm_start;
|
|
offset = (vma->vm_pgoff << PAGE_SHIFT);
|
|
size = vma->vm_end - vma->vm_start;
|
|
|
|
/* some basic size/offset sanity checks */
|
|
if (size > max_size)
|
|
goto out;
|
|
if (offset > max_size - size)
|
|
goto out;
|
|
|
|
rc = via_syscall_down (card, nonblock);
|
|
if (rc) goto out;
|
|
|
|
vma->vm_ops = &via_mm_ops;
|
|
vma->vm_private_data = card;
|
|
|
|
#ifdef VM_RESERVED
|
|
vma->vm_flags |= VM_RESERVED;
|
|
#endif
|
|
|
|
if (rd)
|
|
card->ch_in.is_mapped = 1;
|
|
if (wr)
|
|
card->ch_out.is_mapped = 1;
|
|
|
|
mutex_unlock(&card->syscall_mutex);
|
|
rc = 0;
|
|
|
|
out:
|
|
DPRINTK ("EXIT, returning %d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
|
|
static ssize_t via_dsp_do_read (struct via_info *card,
|
|
char __user *userbuf, size_t count,
|
|
int nonblock)
|
|
{
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
const char __user *orig_userbuf = userbuf;
|
|
struct via_channel *chan = &card->ch_in;
|
|
size_t size;
|
|
int n, tmp;
|
|
ssize_t ret = 0;
|
|
|
|
/* if SGD has not yet been started, start it */
|
|
via_chan_maybe_start (chan);
|
|
|
|
handle_one_block:
|
|
/* just to be a nice neighbor */
|
|
/* Thomas Sailer:
|
|
* But also to ourselves, release semaphore if we do so */
|
|
if (need_resched()) {
|
|
mutex_unlock(&card->syscall_mutex);
|
|
schedule ();
|
|
ret = via_syscall_down (card, nonblock);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
/* grab current channel software pointer. In the case of
|
|
* recording, this is pointing to the next buffer that
|
|
* will receive data from the audio hardware.
|
|
*/
|
|
n = chan->sw_ptr;
|
|
|
|
/* n_frags represents the number of fragments waiting
|
|
* to be copied to userland. sleep until at least
|
|
* one buffer has been read from the audio hardware.
|
|
*/
|
|
add_wait_queue(&chan->wait, &wait);
|
|
for (;;) {
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
tmp = atomic_read (&chan->n_frags);
|
|
assert (tmp >= 0);
|
|
assert (tmp <= chan->frag_number);
|
|
if (tmp)
|
|
break;
|
|
if (nonblock || !chan->is_active) {
|
|
ret = -EAGAIN;
|
|
break;
|
|
}
|
|
|
|
mutex_unlock(&card->syscall_mutex);
|
|
|
|
DPRINTK ("Sleeping on block %d\n", n);
|
|
schedule();
|
|
|
|
ret = via_syscall_down (card, nonblock);
|
|
if (ret)
|
|
break;
|
|
|
|
if (signal_pending (current)) {
|
|
ret = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
}
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&chan->wait, &wait);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* Now that we have a buffer we can read from, send
|
|
* as much as sample data possible to userspace.
|
|
*/
|
|
while ((count > 0) && (chan->slop_len < chan->frag_size)) {
|
|
size_t slop_left = chan->frag_size - chan->slop_len;
|
|
void *base = chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr;
|
|
unsigned ofs = (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size;
|
|
|
|
size = (count < slop_left) ? count : slop_left;
|
|
if (copy_to_user (userbuf,
|
|
base + ofs + chan->slop_len,
|
|
size)) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
count -= size;
|
|
chan->slop_len += size;
|
|
userbuf += size;
|
|
}
|
|
|
|
/* If we didn't copy the buffer completely to userspace,
|
|
* stop now.
|
|
*/
|
|
if (chan->slop_len < chan->frag_size)
|
|
goto out;
|
|
|
|
/*
|
|
* If we get to this point, we copied one buffer completely
|
|
* to userspace, give the buffer back to the hardware.
|
|
*/
|
|
|
|
/* advance channel software pointer to point to
|
|
* the next buffer from which we will copy
|
|
*/
|
|
if (chan->sw_ptr == (chan->frag_number - 1))
|
|
chan->sw_ptr = 0;
|
|
else
|
|
chan->sw_ptr++;
|
|
|
|
/* mark one less buffer waiting to be processed */
|
|
assert (atomic_read (&chan->n_frags) > 0);
|
|
atomic_dec (&chan->n_frags);
|
|
|
|
/* we are at a block boundary, there is no fragment data */
|
|
chan->slop_len = 0;
|
|
|
|
DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
|
|
n, chan->sw_ptr, atomic_read (&chan->n_frags));
|
|
|
|
DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
|
|
inb (card->baseaddr + 0x00),
|
|
inb (card->baseaddr + 0x01),
|
|
inb (card->baseaddr + 0x02),
|
|
inl (card->baseaddr + 0x04),
|
|
inl (card->baseaddr + 0x0C),
|
|
inl (card->baseaddr + 0x80),
|
|
inl (card->baseaddr + 0x84));
|
|
|
|
if (count > 0)
|
|
goto handle_one_block;
|
|
|
|
out:
|
|
return (userbuf != orig_userbuf) ? (userbuf - orig_userbuf) : ret;
|
|
}
|
|
|
|
|
|
static ssize_t via_dsp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
|
|
{
|
|
struct via_info *card;
|
|
int nonblock = (file->f_flags & O_NONBLOCK);
|
|
int rc;
|
|
|
|
DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
|
|
file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
|
|
|
|
assert (file != NULL);
|
|
card = file->private_data;
|
|
assert (card != NULL);
|
|
|
|
rc = via_syscall_down (card, nonblock);
|
|
if (rc) goto out;
|
|
|
|
if (card->ch_in.is_mapped) {
|
|
rc = -ENXIO;
|
|
goto out_up;
|
|
}
|
|
|
|
via_chan_set_buffering(card, &card->ch_in, -1);
|
|
rc = via_chan_buffer_init (card, &card->ch_in);
|
|
|
|
if (rc)
|
|
goto out_up;
|
|
|
|
rc = via_dsp_do_read (card, buffer, count, nonblock);
|
|
|
|
out_up:
|
|
mutex_unlock(&card->syscall_mutex);
|
|
out:
|
|
DPRINTK ("EXIT, returning %ld\n",(long) rc);
|
|
return rc;
|
|
}
|
|
|
|
|
|
static ssize_t via_dsp_do_write (struct via_info *card,
|
|
const char __user *userbuf, size_t count,
|
|
int nonblock)
|
|
{
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
const char __user *orig_userbuf = userbuf;
|
|
struct via_channel *chan = &card->ch_out;
|
|
volatile struct via_sgd_table *sgtable = chan->sgtable;
|
|
size_t size;
|
|
int n, tmp;
|
|
ssize_t ret = 0;
|
|
|
|
handle_one_block:
|
|
/* just to be a nice neighbor */
|
|
/* Thomas Sailer:
|
|
* But also to ourselves, release semaphore if we do so */
|
|
if (need_resched()) {
|
|
mutex_unlock(&card->syscall_mutex);
|
|
schedule ();
|
|
ret = via_syscall_down (card, nonblock);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
/* grab current channel fragment pointer. In the case of
|
|
* playback, this is pointing to the next fragment that
|
|
* should receive data from userland.
|
|
*/
|
|
n = chan->sw_ptr;
|
|
|
|
/* n_frags represents the number of fragments remaining
|
|
* to be filled by userspace. Sleep until
|
|
* at least one fragment is available for our use.
|
|
*/
|
|
add_wait_queue(&chan->wait, &wait);
|
|
for (;;) {
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
tmp = atomic_read (&chan->n_frags);
|
|
assert (tmp >= 0);
|
|
assert (tmp <= chan->frag_number);
|
|
if (tmp)
|
|
break;
|
|
if (nonblock || !chan->is_active) {
|
|
ret = -EAGAIN;
|
|
break;
|
|
}
|
|
|
|
mutex_unlock(&card->syscall_mutex);
|
|
|
|
DPRINTK ("Sleeping on page %d, tmp==%d, ir==%d\n", n, tmp, chan->is_record);
|
|
schedule();
|
|
|
|
ret = via_syscall_down (card, nonblock);
|
|
if (ret)
|
|
break;
|
|
|
|
if (signal_pending (current)) {
|
|
ret = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
}
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&chan->wait, &wait);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* Now that we have at least one fragment we can write to, fill the buffer
|
|
* as much as possible with data from userspace.
|
|
*/
|
|
while ((count > 0) && (chan->slop_len < chan->frag_size)) {
|
|
size_t slop_left = chan->frag_size - chan->slop_len;
|
|
|
|
size = (count < slop_left) ? count : slop_left;
|
|
if (copy_from_user (chan->pgtbl[n / (PAGE_SIZE / chan->frag_size)].cpuaddr + (n % (PAGE_SIZE / chan->frag_size)) * chan->frag_size + chan->slop_len,
|
|
userbuf, size)) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
count -= size;
|
|
chan->slop_len += size;
|
|
userbuf += size;
|
|
}
|
|
|
|
/* If we didn't fill up the buffer with data, stop now.
|
|
* Put a 'stop' marker in the DMA table too, to tell the
|
|
* audio hardware to stop if it gets here.
|
|
*/
|
|
if (chan->slop_len < chan->frag_size) {
|
|
sgtable[n].count = cpu_to_le32 (chan->slop_len | VIA_EOL | VIA_STOP);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* If we get to this point, we have filled a buffer with
|
|
* audio data, flush the buffer to audio hardware.
|
|
*/
|
|
|
|
/* Record the true size for the audio hardware to notice */
|
|
if (n == (chan->frag_number - 1))
|
|
sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_EOL);
|
|
else
|
|
sgtable[n].count = cpu_to_le32 (chan->frag_size | VIA_FLAG);
|
|
|
|
/* advance channel software pointer to point to
|
|
* the next buffer we will fill with data
|
|
*/
|
|
if (chan->sw_ptr == (chan->frag_number - 1))
|
|
chan->sw_ptr = 0;
|
|
else
|
|
chan->sw_ptr++;
|
|
|
|
/* mark one less buffer as being available for userspace consumption */
|
|
assert (atomic_read (&chan->n_frags) > 0);
|
|
atomic_dec (&chan->n_frags);
|
|
|
|
/* we are at a block boundary, there is no fragment data */
|
|
chan->slop_len = 0;
|
|
|
|
/* if SGD has not yet been started, start it */
|
|
via_chan_maybe_start (chan);
|
|
|
|
DPRINTK ("Flushed block %u, sw_ptr now %u, n_frags now %d\n",
|
|
n, chan->sw_ptr, atomic_read (&chan->n_frags));
|
|
|
|
DPRINTK ("regs==S=%02X C=%02X TP=%02X BP=%08X RT=%08X SG=%08X CC=%08X SS=%08X\n",
|
|
inb (card->baseaddr + 0x00),
|
|
inb (card->baseaddr + 0x01),
|
|
inb (card->baseaddr + 0x02),
|
|
inl (card->baseaddr + 0x04),
|
|
inl (card->baseaddr + 0x08),
|
|
inl (card->baseaddr + 0x0C),
|
|
inl (card->baseaddr + 0x80),
|
|
inl (card->baseaddr + 0x84));
|
|
|
|
if (count > 0)
|
|
goto handle_one_block;
|
|
|
|
out:
|
|
if (userbuf - orig_userbuf)
|
|
return userbuf - orig_userbuf;
|
|
else
|
|
return ret;
|
|
}
|
|
|
|
|
|
static ssize_t via_dsp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
|
|
{
|
|
struct via_info *card;
|
|
ssize_t rc;
|
|
int nonblock = (file->f_flags & O_NONBLOCK);
|
|
|
|
DPRINTK ("ENTER, file=%p, buffer=%p, count=%u, ppos=%lu\n",
|
|
file, buffer, count, ppos ? ((unsigned long)*ppos) : 0);
|
|
|
|
assert (file != NULL);
|
|
card = file->private_data;
|
|
assert (card != NULL);
|
|
|
|
rc = via_syscall_down (card, nonblock);
|
|
if (rc) goto out;
|
|
|
|
if (card->ch_out.is_mapped) {
|
|
rc = -ENXIO;
|
|
goto out_up;
|
|
}
|
|
|
|
via_chan_set_buffering(card, &card->ch_out, -1);
|
|
rc = via_chan_buffer_init (card, &card->ch_out);
|
|
|
|
if (rc)
|
|
goto out_up;
|
|
|
|
rc = via_dsp_do_write (card, buffer, count, nonblock);
|
|
|
|
out_up:
|
|
mutex_unlock(&card->syscall_mutex);
|
|
out:
|
|
DPRINTK ("EXIT, returning %ld\n",(long) rc);
|
|
return rc;
|
|
}
|
|
|
|
|
|
static unsigned int via_dsp_poll(struct file *file, struct poll_table_struct *wait)
|
|
{
|
|
struct via_info *card;
|
|
struct via_channel *chan;
|
|
unsigned int mask = 0;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (file != NULL);
|
|
card = file->private_data;
|
|
assert (card != NULL);
|
|
|
|
if (file->f_mode & FMODE_READ) {
|
|
chan = &card->ch_in;
|
|
if (sg_active (chan->iobase))
|
|
poll_wait(file, &chan->wait, wait);
|
|
if (atomic_read (&chan->n_frags) > 0)
|
|
mask |= POLLIN | POLLRDNORM;
|
|
}
|
|
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
chan = &card->ch_out;
|
|
if (sg_active (chan->iobase))
|
|
poll_wait(file, &chan->wait, wait);
|
|
if (atomic_read (&chan->n_frags) > 0)
|
|
mask |= POLLOUT | POLLWRNORM;
|
|
}
|
|
|
|
DPRINTK ("EXIT, returning %u\n", mask);
|
|
return mask;
|
|
}
|
|
|
|
|
|
/**
|
|
* via_dsp_drain_playback - sleep until all playback samples are flushed
|
|
* @card: Private info for specified board
|
|
* @chan: Channel to drain
|
|
* @nonblock: boolean, non-zero if O_NONBLOCK is set
|
|
*
|
|
* Sleeps until all playback has been flushed to the audio
|
|
* hardware.
|
|
*
|
|
* Locking: inside card->syscall_mutex
|
|
*/
|
|
|
|
static int via_dsp_drain_playback (struct via_info *card,
|
|
struct via_channel *chan, int nonblock)
|
|
{
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
int ret = 0;
|
|
|
|
DPRINTK ("ENTER, nonblock = %d\n", nonblock);
|
|
|
|
if (chan->slop_len > 0)
|
|
via_chan_flush_frag (chan);
|
|
|
|
if (atomic_read (&chan->n_frags) == chan->frag_number)
|
|
goto out;
|
|
|
|
via_chan_maybe_start (chan);
|
|
|
|
add_wait_queue(&chan->wait, &wait);
|
|
for (;;) {
|
|
DPRINTK ("FRAGS %d FRAGNUM %d\n", atomic_read(&chan->n_frags), chan->frag_number);
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
if (atomic_read (&chan->n_frags) >= chan->frag_number)
|
|
break;
|
|
|
|
if (nonblock) {
|
|
DPRINTK ("EXIT, returning -EAGAIN\n");
|
|
ret = -EAGAIN;
|
|
break;
|
|
}
|
|
|
|
#ifdef VIA_DEBUG
|
|
{
|
|
u8 r40,r41,r42,r43,r44,r48;
|
|
pci_read_config_byte (card->pdev, 0x40, &r40);
|
|
pci_read_config_byte (card->pdev, 0x41, &r41);
|
|
pci_read_config_byte (card->pdev, 0x42, &r42);
|
|
pci_read_config_byte (card->pdev, 0x43, &r43);
|
|
pci_read_config_byte (card->pdev, 0x44, &r44);
|
|
pci_read_config_byte (card->pdev, 0x48, &r48);
|
|
DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
|
|
r40,r41,r42,r43,r44,r48);
|
|
|
|
DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
|
|
inb (card->baseaddr + 0x00),
|
|
inb (card->baseaddr + 0x01),
|
|
inb (card->baseaddr + 0x02),
|
|
inl (card->baseaddr + 0x04),
|
|
inl (card->baseaddr + 0x0C),
|
|
inl (card->baseaddr + 0x80),
|
|
inl (card->baseaddr + 0x84));
|
|
}
|
|
|
|
if (!chan->is_active)
|
|
printk (KERN_ERR "sleeping but not active\n");
|
|
#endif
|
|
|
|
mutex_unlock(&card->syscall_mutex);
|
|
|
|
DPRINTK ("sleeping, nbufs=%d\n", atomic_read (&chan->n_frags));
|
|
schedule();
|
|
|
|
if ((ret = via_syscall_down (card, nonblock)))
|
|
break;
|
|
|
|
if (signal_pending (current)) {
|
|
DPRINTK ("EXIT, returning -ERESTARTSYS\n");
|
|
ret = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
}
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&chan->wait, &wait);
|
|
|
|
#ifdef VIA_DEBUG
|
|
{
|
|
u8 r40,r41,r42,r43,r44,r48;
|
|
pci_read_config_byte (card->pdev, 0x40, &r40);
|
|
pci_read_config_byte (card->pdev, 0x41, &r41);
|
|
pci_read_config_byte (card->pdev, 0x42, &r42);
|
|
pci_read_config_byte (card->pdev, 0x43, &r43);
|
|
pci_read_config_byte (card->pdev, 0x44, &r44);
|
|
pci_read_config_byte (card->pdev, 0x48, &r48);
|
|
DPRINTK ("PCI config: %02X %02X %02X %02X %02X %02X\n",
|
|
r40,r41,r42,r43,r44,r48);
|
|
|
|
DPRINTK ("regs==%02X %02X %02X %08X %08X %08X %08X\n",
|
|
inb (card->baseaddr + 0x00),
|
|
inb (card->baseaddr + 0x01),
|
|
inb (card->baseaddr + 0x02),
|
|
inl (card->baseaddr + 0x04),
|
|
inl (card->baseaddr + 0x0C),
|
|
inl (card->baseaddr + 0x80),
|
|
inl (card->baseaddr + 0x84));
|
|
|
|
DPRINTK ("final nbufs=%d\n", atomic_read (&chan->n_frags));
|
|
}
|
|
#endif
|
|
|
|
out:
|
|
DPRINTK ("EXIT, returning %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* via_dsp_ioctl_space - get information about channel buffering
|
|
* @card: Private info for specified board
|
|
* @chan: pointer to channel-specific info
|
|
* @arg: user buffer for returned information
|
|
*
|
|
* Handles SNDCTL_DSP_GETISPACE and SNDCTL_DSP_GETOSPACE.
|
|
*
|
|
* Locking: inside card->syscall_mutex
|
|
*/
|
|
|
|
static int via_dsp_ioctl_space (struct via_info *card,
|
|
struct via_channel *chan,
|
|
void __user *arg)
|
|
{
|
|
audio_buf_info info;
|
|
|
|
via_chan_set_buffering(card, chan, -1);
|
|
|
|
info.fragstotal = chan->frag_number;
|
|
info.fragsize = chan->frag_size;
|
|
|
|
/* number of full fragments we can read/write without blocking */
|
|
info.fragments = atomic_read (&chan->n_frags);
|
|
|
|
if ((chan->slop_len % chan->frag_size > 0) && (info.fragments > 0))
|
|
info.fragments--;
|
|
|
|
/* number of bytes that can be read or written immediately
|
|
* without blocking.
|
|
*/
|
|
info.bytes = (info.fragments * chan->frag_size);
|
|
if (chan->slop_len % chan->frag_size > 0)
|
|
info.bytes += chan->frag_size - (chan->slop_len % chan->frag_size);
|
|
|
|
DPRINTK ("EXIT, returning fragstotal=%d, fragsize=%d, fragments=%d, bytes=%d\n",
|
|
info.fragstotal,
|
|
info.fragsize,
|
|
info.fragments,
|
|
info.bytes);
|
|
|
|
return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
|
|
}
|
|
|
|
|
|
/**
|
|
* via_dsp_ioctl_ptr - get information about hardware buffer ptr
|
|
* @card: Private info for specified board
|
|
* @chan: pointer to channel-specific info
|
|
* @arg: user buffer for returned information
|
|
*
|
|
* Handles SNDCTL_DSP_GETIPTR and SNDCTL_DSP_GETOPTR.
|
|
*
|
|
* Locking: inside card->syscall_mutex
|
|
*/
|
|
|
|
static int via_dsp_ioctl_ptr (struct via_info *card,
|
|
struct via_channel *chan,
|
|
void __user *arg)
|
|
{
|
|
count_info info;
|
|
|
|
spin_lock_irq (&card->lock);
|
|
|
|
info.bytes = chan->bytes;
|
|
info.blocks = chan->n_irqs;
|
|
chan->n_irqs = 0;
|
|
|
|
spin_unlock_irq (&card->lock);
|
|
|
|
if (chan->is_active) {
|
|
unsigned long extra;
|
|
info.ptr = atomic_read (&chan->hw_ptr) * chan->frag_size;
|
|
extra = chan->frag_size - via_sg_offset(chan);
|
|
info.ptr += extra;
|
|
info.bytes += extra;
|
|
} else {
|
|
info.ptr = 0;
|
|
}
|
|
|
|
DPRINTK ("EXIT, returning bytes=%d, blocks=%d, ptr=%d\n",
|
|
info.bytes,
|
|
info.blocks,
|
|
info.ptr);
|
|
|
|
return copy_to_user (arg, &info, sizeof (info))?-EFAULT:0;
|
|
}
|
|
|
|
|
|
static int via_dsp_ioctl_trigger (struct via_channel *chan, int val)
|
|
{
|
|
int enable, do_something;
|
|
|
|
if (chan->is_record)
|
|
enable = (val & PCM_ENABLE_INPUT);
|
|
else
|
|
enable = (val & PCM_ENABLE_OUTPUT);
|
|
|
|
if (!chan->is_enabled && enable) {
|
|
do_something = 1;
|
|
} else if (chan->is_enabled && !enable) {
|
|
do_something = -1;
|
|
} else {
|
|
do_something = 0;
|
|
}
|
|
|
|
DPRINTK ("enable=%d, do_something=%d\n",
|
|
enable, do_something);
|
|
|
|
if (chan->is_active && do_something)
|
|
return -EINVAL;
|
|
|
|
if (do_something == 1) {
|
|
chan->is_enabled = 1;
|
|
via_chan_maybe_start (chan);
|
|
DPRINTK ("Triggering input\n");
|
|
}
|
|
|
|
else if (do_something == -1) {
|
|
chan->is_enabled = 0;
|
|
DPRINTK ("Setup input trigger\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int via_dsp_ioctl (struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
int rc, rd=0, wr=0, val=0;
|
|
struct via_info *card;
|
|
struct via_channel *chan;
|
|
int nonblock = (file->f_flags & O_NONBLOCK);
|
|
int __user *ip = (int __user *)arg;
|
|
void __user *p = (void __user *)arg;
|
|
|
|
assert (file != NULL);
|
|
card = file->private_data;
|
|
assert (card != NULL);
|
|
|
|
if (file->f_mode & FMODE_WRITE)
|
|
wr = 1;
|
|
if (file->f_mode & FMODE_READ)
|
|
rd = 1;
|
|
|
|
rc = via_syscall_down (card, nonblock);
|
|
if (rc)
|
|
return rc;
|
|
rc = -EINVAL;
|
|
|
|
switch (cmd) {
|
|
|
|
/* OSS API version. XXX unverified */
|
|
case OSS_GETVERSION:
|
|
DPRINTK ("ioctl OSS_GETVERSION, EXIT, returning SOUND_VERSION\n");
|
|
rc = put_user (SOUND_VERSION, ip);
|
|
break;
|
|
|
|
/* list of supported PCM data formats */
|
|
case SNDCTL_DSP_GETFMTS:
|
|
DPRINTK ("DSP_GETFMTS, EXIT, returning AFMT U8|S16_LE\n");
|
|
rc = put_user (AFMT_U8 | AFMT_S16_LE, ip);
|
|
break;
|
|
|
|
/* query or set current channel's PCM data format */
|
|
case SNDCTL_DSP_SETFMT:
|
|
if (get_user(val, ip)) {
|
|
rc = -EFAULT;
|
|
break;
|
|
}
|
|
DPRINTK ("DSP_SETFMT, val==%d\n", val);
|
|
if (val != AFMT_QUERY) {
|
|
rc = 0;
|
|
|
|
if (rd)
|
|
rc = via_chan_set_fmt (card, &card->ch_in, val);
|
|
|
|
if (rc >= 0 && wr)
|
|
rc = via_chan_set_fmt (card, &card->ch_out, val);
|
|
|
|
if (rc < 0)
|
|
break;
|
|
|
|
val = rc;
|
|
} else {
|
|
if ((rd && (card->ch_in.pcm_fmt & VIA_PCM_FMT_16BIT)) ||
|
|
(wr && (card->ch_out.pcm_fmt & VIA_PCM_FMT_16BIT)))
|
|
val = AFMT_S16_LE;
|
|
else
|
|
val = AFMT_U8;
|
|
}
|
|
DPRINTK ("SETFMT EXIT, returning %d\n", val);
|
|
rc = put_user (val, ip);
|
|
break;
|
|
|
|
/* query or set number of channels (1=mono, 2=stereo, 4/6 for multichannel) */
|
|
case SNDCTL_DSP_CHANNELS:
|
|
if (get_user(val, ip)) {
|
|
rc = -EFAULT;
|
|
break;
|
|
}
|
|
DPRINTK ("DSP_CHANNELS, val==%d\n", val);
|
|
if (val != 0) {
|
|
rc = 0;
|
|
|
|
if (rd)
|
|
rc = via_chan_set_stereo (card, &card->ch_in, val);
|
|
|
|
if (rc >= 0 && wr)
|
|
rc = via_chan_set_stereo (card, &card->ch_out, val);
|
|
|
|
if (rc < 0)
|
|
break;
|
|
|
|
val = rc;
|
|
} else {
|
|
if (rd)
|
|
val = card->ch_in.channels;
|
|
else
|
|
val = card->ch_out.channels;
|
|
}
|
|
DPRINTK ("CHANNELS EXIT, returning %d\n", val);
|
|
rc = put_user (val, ip);
|
|
break;
|
|
|
|
/* enable (val is not zero) or disable (val == 0) stereo */
|
|
case SNDCTL_DSP_STEREO:
|
|
if (get_user(val, ip)) {
|
|
rc = -EFAULT;
|
|
break;
|
|
}
|
|
DPRINTK ("DSP_STEREO, val==%d\n", val);
|
|
rc = 0;
|
|
|
|
if (rd)
|
|
rc = via_chan_set_stereo (card, &card->ch_in, val ? 2 : 1);
|
|
if (rc >= 0 && wr)
|
|
rc = via_chan_set_stereo (card, &card->ch_out, val ? 2 : 1);
|
|
|
|
if (rc < 0)
|
|
break;
|
|
|
|
val = rc - 1;
|
|
|
|
DPRINTK ("STEREO EXIT, returning %d\n", val);
|
|
rc = put_user(val, ip);
|
|
break;
|
|
|
|
/* query or set sampling rate */
|
|
case SNDCTL_DSP_SPEED:
|
|
if (get_user(val, ip)) {
|
|
rc = -EFAULT;
|
|
break;
|
|
}
|
|
DPRINTK ("DSP_SPEED, val==%d\n", val);
|
|
if (val < 0) {
|
|
rc = -EINVAL;
|
|
break;
|
|
}
|
|
if (val > 0) {
|
|
rc = 0;
|
|
|
|
if (rd)
|
|
rc = via_chan_set_speed (card, &card->ch_in, val);
|
|
if (rc >= 0 && wr)
|
|
rc = via_chan_set_speed (card, &card->ch_out, val);
|
|
|
|
if (rc < 0)
|
|
break;
|
|
|
|
val = rc;
|
|
} else {
|
|
if (rd)
|
|
val = card->ch_in.rate;
|
|
else if (wr)
|
|
val = card->ch_out.rate;
|
|
else
|
|
val = 0;
|
|
}
|
|
DPRINTK ("SPEED EXIT, returning %d\n", val);
|
|
rc = put_user (val, ip);
|
|
break;
|
|
|
|
/* wait until all buffers have been played, and then stop device */
|
|
case SNDCTL_DSP_SYNC:
|
|
DPRINTK ("DSP_SYNC\n");
|
|
rc = 0;
|
|
if (wr) {
|
|
DPRINTK ("SYNC EXIT (after calling via_dsp_drain_playback)\n");
|
|
rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
|
|
}
|
|
break;
|
|
|
|
/* stop recording/playback immediately */
|
|
case SNDCTL_DSP_RESET:
|
|
DPRINTK ("DSP_RESET\n");
|
|
if (rd) {
|
|
via_chan_clear (card, &card->ch_in);
|
|
card->ch_in.frag_number = 0;
|
|
card->ch_in.frag_size = 0;
|
|
atomic_set(&card->ch_in.n_frags, 0);
|
|
}
|
|
|
|
if (wr) {
|
|
via_chan_clear (card, &card->ch_out);
|
|
card->ch_out.frag_number = 0;
|
|
card->ch_out.frag_size = 0;
|
|
atomic_set(&card->ch_out.n_frags, 0);
|
|
}
|
|
|
|
rc = 0;
|
|
break;
|
|
|
|
case SNDCTL_DSP_NONBLOCK:
|
|
file->f_flags |= O_NONBLOCK;
|
|
rc = 0;
|
|
break;
|
|
|
|
/* obtain bitmask of device capabilities, such as mmap, full duplex, etc. */
|
|
case SNDCTL_DSP_GETCAPS:
|
|
DPRINTK ("DSP_GETCAPS\n");
|
|
rc = put_user(VIA_DSP_CAP, ip);
|
|
break;
|
|
|
|
/* obtain buffer fragment size */
|
|
case SNDCTL_DSP_GETBLKSIZE:
|
|
DPRINTK ("DSP_GETBLKSIZE\n");
|
|
|
|
if (rd) {
|
|
via_chan_set_buffering(card, &card->ch_in, -1);
|
|
rc = put_user(card->ch_in.frag_size, ip);
|
|
} else if (wr) {
|
|
via_chan_set_buffering(card, &card->ch_out, -1);
|
|
rc = put_user(card->ch_out.frag_size, ip);
|
|
}
|
|
break;
|
|
|
|
/* obtain information about input buffering */
|
|
case SNDCTL_DSP_GETISPACE:
|
|
DPRINTK ("DSP_GETISPACE\n");
|
|
if (rd)
|
|
rc = via_dsp_ioctl_space (card, &card->ch_in, p);
|
|
break;
|
|
|
|
/* obtain information about output buffering */
|
|
case SNDCTL_DSP_GETOSPACE:
|
|
DPRINTK ("DSP_GETOSPACE\n");
|
|
if (wr)
|
|
rc = via_dsp_ioctl_space (card, &card->ch_out, p);
|
|
break;
|
|
|
|
/* obtain information about input hardware pointer */
|
|
case SNDCTL_DSP_GETIPTR:
|
|
DPRINTK ("DSP_GETIPTR\n");
|
|
if (rd)
|
|
rc = via_dsp_ioctl_ptr (card, &card->ch_in, p);
|
|
break;
|
|
|
|
/* obtain information about output hardware pointer */
|
|
case SNDCTL_DSP_GETOPTR:
|
|
DPRINTK ("DSP_GETOPTR\n");
|
|
if (wr)
|
|
rc = via_dsp_ioctl_ptr (card, &card->ch_out, p);
|
|
break;
|
|
|
|
/* return number of bytes remaining to be played by DMA engine */
|
|
case SNDCTL_DSP_GETODELAY:
|
|
{
|
|
DPRINTK ("DSP_GETODELAY\n");
|
|
|
|
chan = &card->ch_out;
|
|
|
|
if (!wr)
|
|
break;
|
|
|
|
if (chan->is_active) {
|
|
|
|
val = chan->frag_number - atomic_read (&chan->n_frags);
|
|
|
|
assert(val >= 0);
|
|
|
|
if (val > 0) {
|
|
val *= chan->frag_size;
|
|
val -= chan->frag_size - via_sg_offset(chan);
|
|
}
|
|
val += chan->slop_len % chan->frag_size;
|
|
} else
|
|
val = 0;
|
|
|
|
assert (val <= (chan->frag_size * chan->frag_number));
|
|
|
|
DPRINTK ("GETODELAY EXIT, val = %d bytes\n", val);
|
|
rc = put_user (val, ip);
|
|
break;
|
|
}
|
|
|
|
/* handle the quick-start of a channel,
|
|
* or the notification that a quick-start will
|
|
* occur in the future
|
|
*/
|
|
case SNDCTL_DSP_SETTRIGGER:
|
|
if (get_user(val, ip)) {
|
|
rc = -EFAULT;
|
|
break;
|
|
}
|
|
DPRINTK ("DSP_SETTRIGGER, rd=%d, wr=%d, act=%d/%d, en=%d/%d\n",
|
|
rd, wr, card->ch_in.is_active, card->ch_out.is_active,
|
|
card->ch_in.is_enabled, card->ch_out.is_enabled);
|
|
|
|
rc = 0;
|
|
|
|
if (rd)
|
|
rc = via_dsp_ioctl_trigger (&card->ch_in, val);
|
|
|
|
if (!rc && wr)
|
|
rc = via_dsp_ioctl_trigger (&card->ch_out, val);
|
|
|
|
break;
|
|
|
|
case SNDCTL_DSP_GETTRIGGER:
|
|
val = 0;
|
|
if ((file->f_mode & FMODE_READ) && card->ch_in.is_enabled)
|
|
val |= PCM_ENABLE_INPUT;
|
|
if ((file->f_mode & FMODE_WRITE) && card->ch_out.is_enabled)
|
|
val |= PCM_ENABLE_OUTPUT;
|
|
rc = put_user(val, ip);
|
|
break;
|
|
|
|
/* Enable full duplex. Since we do this as soon as we are opened
|
|
* with O_RDWR, this is mainly a no-op that always returns success.
|
|
*/
|
|
case SNDCTL_DSP_SETDUPLEX:
|
|
DPRINTK ("DSP_SETDUPLEX\n");
|
|
if (!rd || !wr)
|
|
break;
|
|
rc = 0;
|
|
break;
|
|
|
|
/* set fragment size. implemented as a successful no-op for now */
|
|
case SNDCTL_DSP_SETFRAGMENT:
|
|
if (get_user(val, ip)) {
|
|
rc = -EFAULT;
|
|
break;
|
|
}
|
|
DPRINTK ("DSP_SETFRAGMENT, val==%d\n", val);
|
|
|
|
if (rd)
|
|
rc = via_chan_set_buffering(card, &card->ch_in, val);
|
|
|
|
if (wr)
|
|
rc = via_chan_set_buffering(card, &card->ch_out, val);
|
|
|
|
DPRINTK ("SNDCTL_DSP_SETFRAGMENT (fragshift==0x%04X (%d), maxfrags==0x%04X (%d))\n",
|
|
val & 0xFFFF,
|
|
val & 0xFFFF,
|
|
(val >> 16) & 0xFFFF,
|
|
(val >> 16) & 0xFFFF);
|
|
|
|
rc = 0;
|
|
break;
|
|
|
|
/* inform device of an upcoming pause in input (or output). */
|
|
case SNDCTL_DSP_POST:
|
|
DPRINTK ("DSP_POST\n");
|
|
if (wr) {
|
|
if (card->ch_out.slop_len > 0)
|
|
via_chan_flush_frag (&card->ch_out);
|
|
via_chan_maybe_start (&card->ch_out);
|
|
}
|
|
|
|
rc = 0;
|
|
break;
|
|
|
|
/* not implemented */
|
|
default:
|
|
DPRINTK ("unhandled ioctl, cmd==%u, arg==%p\n",
|
|
cmd, p);
|
|
break;
|
|
}
|
|
|
|
mutex_unlock(&card->syscall_mutex);
|
|
DPRINTK ("EXIT, returning %d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
|
|
static int via_dsp_open (struct inode *inode, struct file *file)
|
|
{
|
|
int minor = iminor(inode);
|
|
struct via_info *card;
|
|
struct pci_dev *pdev = NULL;
|
|
struct via_channel *chan;
|
|
struct pci_driver *drvr;
|
|
int nonblock = (file->f_flags & O_NONBLOCK);
|
|
|
|
DPRINTK ("ENTER, minor=%d, file->f_mode=0x%x\n", minor, file->f_mode);
|
|
|
|
if (!(file->f_mode & (FMODE_READ | FMODE_WRITE))) {
|
|
DPRINTK ("EXIT, returning -EINVAL\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
card = NULL;
|
|
while ((pdev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pdev)) != NULL) {
|
|
drvr = pci_dev_driver (pdev);
|
|
if (drvr == &via_driver) {
|
|
assert (pci_get_drvdata (pdev) != NULL);
|
|
|
|
card = pci_get_drvdata (pdev);
|
|
DPRINTK ("dev_dsp = %d, minor = %d, assn = %d\n",
|
|
card->dev_dsp, minor,
|
|
(card->dev_dsp ^ minor) & ~0xf);
|
|
|
|
if (((card->dev_dsp ^ minor) & ~0xf) == 0)
|
|
goto match;
|
|
}
|
|
}
|
|
|
|
DPRINTK ("no matching %s found\n", card ? "minor" : "driver");
|
|
return -ENODEV;
|
|
|
|
match:
|
|
pci_dev_put(pdev);
|
|
if (nonblock) {
|
|
if (!mutex_trylock(&card->open_mutex)) {
|
|
DPRINTK ("EXIT, returning -EAGAIN\n");
|
|
return -EAGAIN;
|
|
}
|
|
} else {
|
|
if (mutex_lock_interruptible(&card->open_mutex)) {
|
|
DPRINTK ("EXIT, returning -ERESTARTSYS\n");
|
|
return -ERESTARTSYS;
|
|
}
|
|
}
|
|
|
|
file->private_data = card;
|
|
DPRINTK ("file->f_mode == 0x%x\n", file->f_mode);
|
|
|
|
/* handle input from analog source */
|
|
if (file->f_mode & FMODE_READ) {
|
|
chan = &card->ch_in;
|
|
|
|
via_chan_init (card, chan);
|
|
|
|
/* why is this forced to 16-bit stereo in all drivers? */
|
|
chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
|
|
chan->channels = 2;
|
|
|
|
// TO DO - use FIFO: via_capture_fifo(card, 1);
|
|
via_chan_pcm_fmt (chan, 0);
|
|
via_set_rate (card->ac97, chan, 44100);
|
|
}
|
|
|
|
/* handle output to analog source */
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
chan = &card->ch_out;
|
|
|
|
via_chan_init (card, chan);
|
|
|
|
if (file->f_mode & FMODE_READ) {
|
|
/* if in duplex mode make the recording and playback channels
|
|
have the same settings */
|
|
chan->pcm_fmt = VIA_PCM_FMT_16BIT | VIA_PCM_FMT_STEREO;
|
|
chan->channels = 2;
|
|
via_chan_pcm_fmt (chan, 0);
|
|
via_set_rate (card->ac97, chan, 44100);
|
|
} else {
|
|
if ((minor & 0xf) == SND_DEV_DSP16) {
|
|
chan->pcm_fmt = VIA_PCM_FMT_16BIT;
|
|
via_chan_pcm_fmt (chan, 0);
|
|
via_set_rate (card->ac97, chan, 44100);
|
|
} else {
|
|
via_chan_pcm_fmt (chan, 1);
|
|
via_set_rate (card->ac97, chan, 8000);
|
|
}
|
|
}
|
|
}
|
|
|
|
DPRINTK ("EXIT, returning 0\n");
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
|
|
static int via_dsp_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct via_info *card;
|
|
int nonblock = (file->f_flags & O_NONBLOCK);
|
|
int rc;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (file != NULL);
|
|
card = file->private_data;
|
|
assert (card != NULL);
|
|
|
|
rc = via_syscall_down (card, nonblock);
|
|
if (rc) {
|
|
DPRINTK ("EXIT (syscall_down error), rc=%d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
rc = via_dsp_drain_playback (card, &card->ch_out, nonblock);
|
|
if (rc && rc != -ERESTARTSYS) /* Nobody needs to know about ^C */
|
|
printk (KERN_DEBUG "via_audio: ignoring drain playback error %d\n", rc);
|
|
|
|
via_chan_free (card, &card->ch_out);
|
|
via_chan_buffer_free(card, &card->ch_out);
|
|
}
|
|
|
|
if (file->f_mode & FMODE_READ) {
|
|
via_chan_free (card, &card->ch_in);
|
|
via_chan_buffer_free (card, &card->ch_in);
|
|
}
|
|
|
|
mutex_unlock(&card->syscall_mutex);
|
|
mutex_unlock(&card->open_mutex);
|
|
|
|
DPRINTK ("EXIT, returning 0\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
/****************************************************************
|
|
*
|
|
* Chip setup and kernel registration
|
|
*
|
|
*
|
|
*/
|
|
|
|
static int __devinit via_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
|
|
{
|
|
#ifdef CONFIG_MIDI_VIA82CXXX
|
|
u8 r42;
|
|
#endif
|
|
int rc;
|
|
struct via_info *card;
|
|
static int printed_version;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
if (printed_version++ == 0)
|
|
printk (KERN_INFO "Via 686a/8233/8235 audio driver " VIA_VERSION "\n");
|
|
|
|
rc = pci_enable_device (pdev);
|
|
if (rc)
|
|
goto err_out;
|
|
|
|
rc = pci_request_regions (pdev, "via82cxxx_audio");
|
|
if (rc)
|
|
goto err_out_disable;
|
|
|
|
rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
|
|
if (rc)
|
|
goto err_out_res;
|
|
rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
|
|
if (rc)
|
|
goto err_out_res;
|
|
|
|
card = kmalloc (sizeof (*card), GFP_KERNEL);
|
|
if (!card) {
|
|
printk (KERN_ERR PFX "out of memory, aborting\n");
|
|
rc = -ENOMEM;
|
|
goto err_out_res;
|
|
}
|
|
|
|
pci_set_drvdata (pdev, card);
|
|
|
|
memset (card, 0, sizeof (*card));
|
|
card->pdev = pdev;
|
|
card->baseaddr = pci_resource_start (pdev, 0);
|
|
card->card_num = via_num_cards++;
|
|
spin_lock_init (&card->lock);
|
|
spin_lock_init (&card->ac97_lock);
|
|
mutex_init(&card->syscall_mutex);
|
|
mutex_init(&card->open_mutex);
|
|
|
|
/* we must init these now, in case the intr handler needs them */
|
|
via_chan_init_defaults (card, &card->ch_out);
|
|
via_chan_init_defaults (card, &card->ch_in);
|
|
via_chan_init_defaults (card, &card->ch_fm);
|
|
|
|
/* if BAR 2 is present, chip is Rev H or later,
|
|
* which means it has a few extra features */
|
|
if (pci_resource_start (pdev, 2) > 0)
|
|
card->rev_h = 1;
|
|
|
|
/* Overkill for now, but more flexible done right */
|
|
|
|
card->intmask = id->driver_data;
|
|
card->legacy = !card->intmask;
|
|
card->sixchannel = id->driver_data;
|
|
|
|
if(card->sixchannel)
|
|
printk(KERN_INFO PFX "Six channel audio available\n");
|
|
if (pdev->irq < 1) {
|
|
printk (KERN_ERR PFX "invalid PCI IRQ %d, aborting\n", pdev->irq);
|
|
rc = -ENODEV;
|
|
goto err_out_kfree;
|
|
}
|
|
|
|
if (!(pci_resource_flags (pdev, 0) & IORESOURCE_IO)) {
|
|
printk (KERN_ERR PFX "unable to locate I/O resources, aborting\n");
|
|
rc = -ENODEV;
|
|
goto err_out_kfree;
|
|
}
|
|
|
|
pci_set_master(pdev);
|
|
|
|
/*
|
|
* init AC97 mixer and codec
|
|
*/
|
|
rc = via_ac97_init (card);
|
|
if (rc) {
|
|
printk (KERN_ERR PFX "AC97 init failed, aborting\n");
|
|
goto err_out_kfree;
|
|
}
|
|
|
|
/*
|
|
* init DSP device
|
|
*/
|
|
rc = via_dsp_init (card);
|
|
if (rc) {
|
|
printk (KERN_ERR PFX "DSP device init failed, aborting\n");
|
|
goto err_out_have_mixer;
|
|
}
|
|
|
|
/*
|
|
* init and turn on interrupts, as the last thing we do
|
|
*/
|
|
rc = via_interrupt_init (card);
|
|
if (rc) {
|
|
printk (KERN_ERR PFX "interrupt init failed, aborting\n");
|
|
goto err_out_have_dsp;
|
|
}
|
|
|
|
printk (KERN_INFO PFX "board #%d at 0x%04lX, IRQ %d\n",
|
|
card->card_num + 1, card->baseaddr, pdev->irq);
|
|
|
|
#ifdef CONFIG_MIDI_VIA82CXXX
|
|
/* Disable by default */
|
|
card->midi_info.io_base = 0;
|
|
|
|
if(card->legacy)
|
|
{
|
|
pci_read_config_byte (pdev, 0x42, &r42);
|
|
/* Disable MIDI interrupt */
|
|
pci_write_config_byte (pdev, 0x42, r42 | VIA_CR42_MIDI_IRQMASK);
|
|
if (r42 & VIA_CR42_MIDI_ENABLE)
|
|
{
|
|
if (r42 & VIA_CR42_MIDI_PNP) /* Address selected by iobase 2 - not tested */
|
|
card->midi_info.io_base = pci_resource_start (pdev, 2);
|
|
else /* Address selected by byte 0x43 */
|
|
{
|
|
u8 r43;
|
|
pci_read_config_byte (pdev, 0x43, &r43);
|
|
card->midi_info.io_base = 0x300 + ((r43 & 0x0c) << 2);
|
|
}
|
|
|
|
card->midi_info.irq = -pdev->irq;
|
|
if (probe_uart401(& card->midi_info, THIS_MODULE))
|
|
{
|
|
card->midi_devc=midi_devs[card->midi_info.slots[4]]->devc;
|
|
pci_write_config_byte(pdev, 0x42, r42 & ~VIA_CR42_MIDI_IRQMASK);
|
|
printk("Enabled Via MIDI\n");
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
DPRINTK ("EXIT, returning 0\n");
|
|
return 0;
|
|
|
|
err_out_have_dsp:
|
|
via_dsp_cleanup (card);
|
|
|
|
err_out_have_mixer:
|
|
via_ac97_cleanup (card);
|
|
|
|
err_out_kfree:
|
|
#ifndef VIA_NDEBUG
|
|
memset (card, OSS_POISON_FREE, sizeof (*card)); /* poison memory */
|
|
#endif
|
|
kfree (card);
|
|
|
|
err_out_res:
|
|
pci_release_regions (pdev);
|
|
|
|
err_out_disable:
|
|
pci_disable_device (pdev);
|
|
|
|
err_out:
|
|
pci_set_drvdata (pdev, NULL);
|
|
DPRINTK ("EXIT - returning %d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
|
|
static void __devexit via_remove_one (struct pci_dev *pdev)
|
|
{
|
|
struct via_info *card;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
assert (pdev != NULL);
|
|
card = pci_get_drvdata (pdev);
|
|
assert (card != NULL);
|
|
|
|
#ifdef CONFIG_MIDI_VIA82CXXX
|
|
if (card->midi_info.io_base)
|
|
unload_uart401(&card->midi_info);
|
|
#endif
|
|
|
|
free_irq (card->pdev->irq, card);
|
|
via_dsp_cleanup (card);
|
|
via_ac97_cleanup (card);
|
|
|
|
#ifndef VIA_NDEBUG
|
|
memset (card, OSS_POISON_FREE, sizeof (*card)); /* poison memory */
|
|
#endif
|
|
kfree (card);
|
|
|
|
pci_set_drvdata (pdev, NULL);
|
|
|
|
pci_release_regions (pdev);
|
|
pci_disable_device (pdev);
|
|
pci_set_power_state (pdev, 3); /* ...zzzzzz */
|
|
|
|
DPRINTK ("EXIT\n");
|
|
return;
|
|
}
|
|
|
|
|
|
/****************************************************************
|
|
*
|
|
* Driver initialization and cleanup
|
|
*
|
|
*
|
|
*/
|
|
|
|
static int __init init_via82cxxx_audio(void)
|
|
{
|
|
int rc;
|
|
|
|
DPRINTK ("ENTER\n");
|
|
|
|
rc = pci_register_driver (&via_driver);
|
|
if (rc) {
|
|
DPRINTK ("EXIT, returning %d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
DPRINTK ("EXIT, returning 0\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void __exit cleanup_via82cxxx_audio(void)
|
|
{
|
|
DPRINTK ("ENTER\n");
|
|
|
|
pci_unregister_driver (&via_driver);
|
|
|
|
DPRINTK ("EXIT\n");
|
|
}
|
|
|
|
|
|
module_init(init_via82cxxx_audio);
|
|
module_exit(cleanup_via82cxxx_audio);
|
|
|
|
MODULE_AUTHOR("Jeff Garzik");
|
|
MODULE_DESCRIPTION("DSP audio and mixer driver for Via 82Cxxx audio devices");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|