![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2060 lines
54 KiB
C
2060 lines
54 KiB
C
/***********************************************************************
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* Copyright 2001 MontaVista Software Inc.
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* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
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*
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* drivers/sound/nec_vrc5477.c
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* AC97 sound dirver for NEC Vrc5477 chip (an integrated,
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* multi-function controller chip for MIPS CPUs)
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*
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* VRA support Copyright 2001 Bradley D. LaRonde <brad@ltc.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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***********************************************************************
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*/
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/*
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* This code is derived from ite8172.c, which is written by Steve Longerbeam.
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*
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* Features:
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* Currently we only support the following capabilities:
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* . mono output to PCM L/R (line out).
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* . stereo output to PCM L/R (line out).
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* . mono input from PCM L (line in).
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* . stereo output from PCM (line in).
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* . sampling rate at 48k or variable sampling rate
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* . support /dev/dsp, /dev/mixer devices, standard OSS devices.
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* . only support 16-bit PCM format (hardware limit, no software
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* translation)
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* . support duplex, but no trigger or realtime.
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*
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* Specifically the following are not supported:
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* . app-set frag size.
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* . mmap'ed buffer access
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*/
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/*
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* Original comments from ite8172.c file.
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*/
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/*
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*
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* Notes:
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*
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* 1. Much of the OSS buffer allocation, ioctl's, and mmap'ing are
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* taken, slightly modified or not at all, from the ES1371 driver,
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* so refer to the credits in es1371.c for those. The rest of the
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* code (probe, open, read, write, the ISR, etc.) is new.
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* 2. The following support is untested:
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* * Memory mapping the audio buffers, and the ioctl controls that go
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* with it.
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* * S/PDIF output.
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* 3. The following is not supported:
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* * I2S input.
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* * legacy audio mode.
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* 4. Support for volume button interrupts is implemented but doesn't
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* work yet.
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*
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* Revision history
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* 02.08.2001 0.1 Initial release
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*/
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/ioport.h>
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#include <linux/sched.h>
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#include <linux/delay.h>
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#include <linux/sound.h>
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#include <linux/slab.h>
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#include <linux/soundcard.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/poll.h>
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#include <linux/bitops.h>
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#include <linux/proc_fs.h>
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#include <linux/spinlock.h>
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#include <linux/smp_lock.h>
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#include <linux/ac97_codec.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <asm/uaccess.h>
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/* -------------------debug macros -------------------------------------- */
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/* #undef VRC5477_AC97_DEBUG */
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#define VRC5477_AC97_DEBUG
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#undef VRC5477_AC97_VERBOSE_DEBUG
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/* #define VRC5477_AC97_VERBOSE_DEBUG */
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#if defined(VRC5477_AC97_VERBOSE_DEBUG)
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#define VRC5477_AC97_DEBUG
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#endif
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#if defined(VRC5477_AC97_DEBUG)
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#define ASSERT(x) if (!(x)) { \
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panic("assertion failed at %s:%d: %s\n", __FILE__, __LINE__, #x); }
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#else
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#define ASSERT(x)
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#endif /* VRC5477_AC97_DEBUG */
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#if defined(VRC5477_AC97_VERBOSE_DEBUG)
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static u16 inTicket; /* check sync between intr & write */
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static u16 outTicket;
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#endif
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/* --------------------------------------------------------------------- */
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#undef OSS_DOCUMENTED_MIXER_SEMANTICS
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static const unsigned sample_shift[] = { 0, 1, 1, 2 };
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#define VRC5477_INT_CLR 0x0
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#define VRC5477_INT_STATUS 0x0
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#define VRC5477_CODEC_WR 0x4
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#define VRC5477_CODEC_RD 0x8
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#define VRC5477_CTRL 0x18
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#define VRC5477_ACLINK_CTRL 0x1c
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#define VRC5477_INT_MASK 0x24
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#define VRC5477_DAC1_CTRL 0x30
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#define VRC5477_DAC1L 0x34
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#define VRC5477_DAC1_BADDR 0x38
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#define VRC5477_DAC2_CTRL 0x3c
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#define VRC5477_DAC2L 0x40
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#define VRC5477_DAC2_BADDR 0x44
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#define VRC5477_DAC3_CTRL 0x48
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#define VRC5477_DAC3L 0x4c
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#define VRC5477_DAC3_BADDR 0x50
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#define VRC5477_ADC1_CTRL 0x54
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#define VRC5477_ADC1L 0x58
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#define VRC5477_ADC1_BADDR 0x5c
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#define VRC5477_ADC2_CTRL 0x60
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#define VRC5477_ADC2L 0x64
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#define VRC5477_ADC2_BADDR 0x68
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#define VRC5477_ADC3_CTRL 0x6c
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#define VRC5477_ADC3L 0x70
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#define VRC5477_ADC3_BADDR 0x74
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#define VRC5477_CODEC_WR_RWC (1 << 23)
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#define VRC5477_CODEC_RD_RRDYA (1 << 31)
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#define VRC5477_CODEC_RD_RRDYD (1 << 30)
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#define VRC5477_ACLINK_CTRL_RST_ON (1 << 15)
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#define VRC5477_ACLINK_CTRL_RST_TIME 0x7f
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#define VRC5477_ACLINK_CTRL_SYNC_ON (1 << 30)
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#define VRC5477_ACLINK_CTRL_CK_STOP_ON (1 << 31)
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#define VRC5477_CTRL_DAC2ENB (1 << 15)
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#define VRC5477_CTRL_ADC2ENB (1 << 14)
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#define VRC5477_CTRL_DAC1ENB (1 << 13)
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#define VRC5477_CTRL_ADC1ENB (1 << 12)
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#define VRC5477_INT_MASK_NMASK (1 << 31)
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#define VRC5477_INT_MASK_DAC1END (1 << 5)
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#define VRC5477_INT_MASK_DAC2END (1 << 4)
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#define VRC5477_INT_MASK_DAC3END (1 << 3)
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#define VRC5477_INT_MASK_ADC1END (1 << 2)
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#define VRC5477_INT_MASK_ADC2END (1 << 1)
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#define VRC5477_INT_MASK_ADC3END (1 << 0)
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#define VRC5477_DMA_ACTIVATION (1 << 31)
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#define VRC5477_DMA_WIP (1 << 30)
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#define VRC5477_AC97_MODULE_NAME "NEC_Vrc5477_audio"
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#define PFX VRC5477_AC97_MODULE_NAME ": "
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/* --------------------------------------------------------------------- */
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struct vrc5477_ac97_state {
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/* list of vrc5477_ac97 devices */
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struct list_head devs;
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/* the corresponding pci_dev structure */
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struct pci_dev *dev;
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/* soundcore stuff */
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int dev_audio;
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/* hardware resources */
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unsigned long io;
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unsigned int irq;
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#ifdef VRC5477_AC97_DEBUG
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/* debug /proc entry */
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struct proc_dir_entry *ps;
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struct proc_dir_entry *ac97_ps;
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#endif /* VRC5477_AC97_DEBUG */
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struct ac97_codec *codec;
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unsigned dacChannels, adcChannels;
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unsigned short dacRate, adcRate;
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unsigned short extended_status;
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spinlock_t lock;
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struct semaphore open_sem;
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mode_t open_mode;
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wait_queue_head_t open_wait;
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struct dmabuf {
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void *lbuf, *rbuf;
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dma_addr_t lbufDma, rbufDma;
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unsigned bufOrder;
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unsigned numFrag;
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unsigned fragShift;
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unsigned fragSize; /* redundant */
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unsigned fragTotalSize; /* = numFrag * fragSize(real) */
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unsigned nextIn;
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unsigned nextOut;
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int count;
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unsigned error; /* over/underrun */
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wait_queue_head_t wait;
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/* OSS stuff */
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unsigned stopped:1;
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unsigned ready:1;
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} dma_dac, dma_adc;
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#define WORK_BUF_SIZE 2048
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struct {
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u16 lchannel;
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u16 rchannel;
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} workBuf[WORK_BUF_SIZE/4];
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};
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/* --------------------------------------------------------------------- */
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static LIST_HEAD(devs);
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/* --------------------------------------------------------------------- */
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static inline unsigned ld2(unsigned int x)
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{
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unsigned r = 0;
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if (x >= 0x10000) {
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x >>= 16;
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r += 16;
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}
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if (x >= 0x100) {
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x >>= 8;
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r += 8;
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}
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if (x >= 0x10) {
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x >>= 4;
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r += 4;
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}
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if (x >= 4) {
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x >>= 2;
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r += 2;
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}
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if (x >= 2)
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r++;
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return r;
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}
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/* --------------------------------------------------------------------- */
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static u16 rdcodec(struct ac97_codec *codec, u8 addr)
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{
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struct vrc5477_ac97_state *s =
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(struct vrc5477_ac97_state *)codec->private_data;
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unsigned long flags;
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u32 result;
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spin_lock_irqsave(&s->lock, flags);
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/* wait until we can access codec registers */
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while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000);
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/* write the address and "read" command to codec */
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addr = addr & 0x7f;
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outl((addr << 16) | VRC5477_CODEC_WR_RWC, s->io + VRC5477_CODEC_WR);
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/* get the return result */
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udelay(100); /* workaround hardware bug */
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while ( (result = inl(s->io + VRC5477_CODEC_RD)) &
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(VRC5477_CODEC_RD_RRDYA | VRC5477_CODEC_RD_RRDYD) ) {
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/* we get either addr or data, or both */
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if (result & VRC5477_CODEC_RD_RRDYA) {
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ASSERT(addr == ((result >> 16) & 0x7f) );
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}
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if (result & VRC5477_CODEC_RD_RRDYD) {
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break;
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}
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}
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spin_unlock_irqrestore(&s->lock, flags);
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return result & 0xffff;
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}
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static void wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
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{
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struct vrc5477_ac97_state *s =
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(struct vrc5477_ac97_state *)codec->private_data;
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unsigned long flags;
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spin_lock_irqsave(&s->lock, flags);
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/* wait until we can access codec registers */
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while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000);
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/* write the address and value to codec */
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outl((addr << 16) | data, s->io + VRC5477_CODEC_WR);
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spin_unlock_irqrestore(&s->lock, flags);
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}
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static void waitcodec(struct ac97_codec *codec)
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{
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struct vrc5477_ac97_state *s =
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(struct vrc5477_ac97_state *)codec->private_data;
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/* wait until we can access codec registers */
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while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000);
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}
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static int ac97_codec_not_present(struct ac97_codec *codec)
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{
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struct vrc5477_ac97_state *s =
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(struct vrc5477_ac97_state *)codec->private_data;
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unsigned long flags;
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unsigned short count = 0xffff;
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spin_lock_irqsave(&s->lock, flags);
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/* wait until we can access codec registers */
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do {
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if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
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break;
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} while (--count);
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if (count == 0) {
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spin_unlock_irqrestore(&s->lock, flags);
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return -1;
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}
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/* write 0 to reset */
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outl((AC97_RESET << 16) | 0, s->io + VRC5477_CODEC_WR);
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/* test whether we get a response from ac97 chip */
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count = 0xffff;
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do {
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if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
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break;
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} while (--count);
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if (count == 0) {
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spin_unlock_irqrestore(&s->lock, flags);
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return -1;
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}
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spin_unlock_irqrestore(&s->lock, flags);
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return 0;
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}
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/* --------------------------------------------------------------------- */
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static void vrc5477_ac97_delay(int msec)
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{
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unsigned long tmo;
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signed long tmo2;
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if (in_interrupt())
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return;
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tmo = jiffies + (msec*HZ)/1000;
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for (;;) {
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tmo2 = tmo - jiffies;
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if (tmo2 <= 0)
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break;
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schedule_timeout(tmo2);
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}
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}
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static void set_adc_rate(struct vrc5477_ac97_state *s, unsigned rate)
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{
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wrcodec(s->codec, AC97_PCM_LR_ADC_RATE, rate);
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s->adcRate = rate;
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}
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static void set_dac_rate(struct vrc5477_ac97_state *s, unsigned rate)
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{
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if(s->extended_status & AC97_EXTSTAT_VRA) {
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wrcodec(s->codec, AC97_PCM_FRONT_DAC_RATE, rate);
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s->dacRate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
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}
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}
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static int ac97_codec_not_present(struct ac97_codec *codec)
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{
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struct vrc5477_ac97_state *s =
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(struct vrc5477_ac97_state *)codec->private_data;
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unsigned long flags;
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unsigned short count = 0xffff;
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spin_lock_irqsave(&s->lock, flags);
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/* wait until we can access codec registers */
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do {
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if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
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break;
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} while (--count);
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if (count == 0) {
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spin_unlock_irqrestore(&s->lock, flags);
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return -1;
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}
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/* write 0 to reset */
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outl((AC97_RESET << 16) | 0, s->io + VRC5477_CODEC_WR);
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/* test whether we get a response from ac97 chip */
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count = 0xffff;
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do {
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if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
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break;
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} while (--count);
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if (count == 0) {
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spin_unlock_irqrestore(&s->lock, flags);
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return -1;
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}
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spin_unlock_irqrestore(&s->lock, flags);
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return 0;
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}
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/* --------------------------------------------------------------------- */
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extern inline void
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stop_dac(struct vrc5477_ac97_state *s)
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{
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struct dmabuf* db = &s->dma_dac;
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unsigned long flags;
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u32 temp;
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spin_lock_irqsave(&s->lock, flags);
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if (db->stopped) {
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spin_unlock_irqrestore(&s->lock, flags);
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return;
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}
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/* deactivate the dma */
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outl(0, s->io + VRC5477_DAC1_CTRL);
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outl(0, s->io + VRC5477_DAC2_CTRL);
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/* wait for DAM completely stop */
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while (inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP);
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while (inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP);
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/* disable dac slots in aclink */
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temp = inl(s->io + VRC5477_CTRL);
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temp &= ~ (VRC5477_CTRL_DAC1ENB | VRC5477_CTRL_DAC2ENB);
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outl (temp, s->io + VRC5477_CTRL);
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/* disable interrupts */
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temp = inl(s->io + VRC5477_INT_MASK);
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temp &= ~ (VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END);
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outl (temp, s->io + VRC5477_INT_MASK);
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/* clear pending ones */
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outl(VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END,
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s->io + VRC5477_INT_CLR);
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db->stopped = 1;
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spin_unlock_irqrestore(&s->lock, flags);
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}
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static void start_dac(struct vrc5477_ac97_state *s)
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{
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struct dmabuf* db = &s->dma_dac;
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unsigned long flags;
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u32 dmaLength;
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u32 temp;
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spin_lock_irqsave(&s->lock, flags);
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if (!db->stopped) {
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spin_unlock_irqrestore(&s->lock, flags);
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return;
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}
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/* we should have some data to do the DMA trasnfer */
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ASSERT(db->count >= db->fragSize);
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/* clear pending fales interrupts */
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outl(VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END,
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s->io + VRC5477_INT_CLR);
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/* enable interrupts */
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temp = inl(s->io + VRC5477_INT_MASK);
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temp |= VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END;
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outl(temp, s->io + VRC5477_INT_MASK);
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|
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/* setup dma base addr */
|
|
outl(db->lbufDma + db->nextOut, s->io + VRC5477_DAC1_BADDR);
|
|
if (s->dacChannels == 1) {
|
|
outl(db->lbufDma + db->nextOut, s->io + VRC5477_DAC2_BADDR);
|
|
} else {
|
|
outl(db->rbufDma + db->nextOut, s->io + VRC5477_DAC2_BADDR);
|
|
}
|
|
|
|
/* set dma length, in the unit of 0x10 bytes */
|
|
dmaLength = db->fragSize >> 4;
|
|
outl(dmaLength, s->io + VRC5477_DAC1L);
|
|
outl(dmaLength, s->io + VRC5477_DAC2L);
|
|
|
|
/* activate dma */
|
|
outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_DAC1_CTRL);
|
|
outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_DAC2_CTRL);
|
|
|
|
/* enable dac slots - we should hear the music now! */
|
|
temp = inl(s->io + VRC5477_CTRL);
|
|
temp |= (VRC5477_CTRL_DAC1ENB | VRC5477_CTRL_DAC2ENB);
|
|
outl (temp, s->io + VRC5477_CTRL);
|
|
|
|
/* it is time to setup next dma transfer */
|
|
ASSERT(inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP);
|
|
ASSERT(inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP);
|
|
|
|
temp = db->nextOut + db->fragSize;
|
|
if (temp >= db->fragTotalSize) {
|
|
ASSERT(temp == db->fragTotalSize);
|
|
temp = 0;
|
|
}
|
|
|
|
outl(db->lbufDma + temp, s->io + VRC5477_DAC1_BADDR);
|
|
if (s->dacChannels == 1) {
|
|
outl(db->lbufDma + temp, s->io + VRC5477_DAC2_BADDR);
|
|
} else {
|
|
outl(db->rbufDma + temp, s->io + VRC5477_DAC2_BADDR);
|
|
}
|
|
|
|
db->stopped = 0;
|
|
|
|
#if defined(VRC5477_AC97_VERBOSE_DEBUG)
|
|
outTicket = *(u16*)(db->lbuf+db->nextOut);
|
|
if (db->count > db->fragSize) {
|
|
ASSERT((u16)(outTicket+1) == *(u16*)(db->lbuf+temp));
|
|
}
|
|
#endif
|
|
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
}
|
|
|
|
extern inline void stop_adc(struct vrc5477_ac97_state *s)
|
|
{
|
|
struct dmabuf* db = &s->dma_adc;
|
|
unsigned long flags;
|
|
u32 temp;
|
|
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
|
|
if (db->stopped) {
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
return;
|
|
}
|
|
|
|
/* deactivate the dma */
|
|
outl(0, s->io + VRC5477_ADC1_CTRL);
|
|
outl(0, s->io + VRC5477_ADC2_CTRL);
|
|
|
|
/* disable adc slots in aclink */
|
|
temp = inl(s->io + VRC5477_CTRL);
|
|
temp &= ~ (VRC5477_CTRL_ADC1ENB | VRC5477_CTRL_ADC2ENB);
|
|
outl (temp, s->io + VRC5477_CTRL);
|
|
|
|
/* disable interrupts */
|
|
temp = inl(s->io + VRC5477_INT_MASK);
|
|
temp &= ~ (VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END);
|
|
outl (temp, s->io + VRC5477_INT_MASK);
|
|
|
|
/* clear pending ones */
|
|
outl(VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END,
|
|
s->io + VRC5477_INT_CLR);
|
|
|
|
db->stopped = 1;
|
|
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
}
|
|
|
|
static void start_adc(struct vrc5477_ac97_state *s)
|
|
{
|
|
struct dmabuf* db = &s->dma_adc;
|
|
unsigned long flags;
|
|
u32 dmaLength;
|
|
u32 temp;
|
|
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
|
|
if (!db->stopped) {
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
return;
|
|
}
|
|
|
|
/* we should at least have some free space in the buffer */
|
|
ASSERT(db->count < db->fragTotalSize - db->fragSize * 2);
|
|
|
|
/* clear pending ones */
|
|
outl(VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END,
|
|
s->io + VRC5477_INT_CLR);
|
|
|
|
/* enable interrupts */
|
|
temp = inl(s->io + VRC5477_INT_MASK);
|
|
temp |= VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END;
|
|
outl(temp, s->io + VRC5477_INT_MASK);
|
|
|
|
/* setup dma base addr */
|
|
outl(db->lbufDma + db->nextIn, s->io + VRC5477_ADC1_BADDR);
|
|
outl(db->rbufDma + db->nextIn, s->io + VRC5477_ADC2_BADDR);
|
|
|
|
/* setup dma length */
|
|
dmaLength = db->fragSize >> 4;
|
|
outl(dmaLength, s->io + VRC5477_ADC1L);
|
|
outl(dmaLength, s->io + VRC5477_ADC2L);
|
|
|
|
/* activate dma */
|
|
outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_ADC1_CTRL);
|
|
outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_ADC2_CTRL);
|
|
|
|
/* enable adc slots */
|
|
temp = inl(s->io + VRC5477_CTRL);
|
|
temp |= (VRC5477_CTRL_ADC1ENB | VRC5477_CTRL_ADC2ENB);
|
|
outl (temp, s->io + VRC5477_CTRL);
|
|
|
|
/* it is time to setup next dma transfer */
|
|
temp = db->nextIn + db->fragSize;
|
|
if (temp >= db->fragTotalSize) {
|
|
ASSERT(temp == db->fragTotalSize);
|
|
temp = 0;
|
|
}
|
|
outl(db->lbufDma + temp, s->io + VRC5477_ADC1_BADDR);
|
|
outl(db->rbufDma + temp, s->io + VRC5477_ADC2_BADDR);
|
|
|
|
db->stopped = 0;
|
|
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
#define DMABUF_DEFAULTORDER (16-PAGE_SHIFT)
|
|
#define DMABUF_MINORDER 1
|
|
|
|
extern inline void dealloc_dmabuf(struct vrc5477_ac97_state *s,
|
|
struct dmabuf *db)
|
|
{
|
|
if (db->lbuf) {
|
|
ASSERT(db->rbuf);
|
|
pci_free_consistent(s->dev, PAGE_SIZE << db->bufOrder,
|
|
db->lbuf, db->lbufDma);
|
|
pci_free_consistent(s->dev, PAGE_SIZE << db->bufOrder,
|
|
db->rbuf, db->rbufDma);
|
|
db->lbuf = db->rbuf = NULL;
|
|
}
|
|
db->nextIn = db->nextOut = 0;
|
|
db->ready = 0;
|
|
}
|
|
|
|
static int prog_dmabuf(struct vrc5477_ac97_state *s,
|
|
struct dmabuf *db,
|
|
unsigned rate)
|
|
{
|
|
int order;
|
|
unsigned bufsize;
|
|
|
|
if (!db->lbuf) {
|
|
ASSERT(!db->rbuf);
|
|
|
|
db->ready = 0;
|
|
for (order = DMABUF_DEFAULTORDER;
|
|
order >= DMABUF_MINORDER;
|
|
order--) {
|
|
db->lbuf = pci_alloc_consistent(s->dev,
|
|
PAGE_SIZE << order,
|
|
&db->lbufDma);
|
|
db->rbuf = pci_alloc_consistent(s->dev,
|
|
PAGE_SIZE << order,
|
|
&db->rbufDma);
|
|
if (db->lbuf && db->rbuf) break;
|
|
if (db->lbuf) {
|
|
ASSERT(!db->rbuf);
|
|
pci_free_consistent(s->dev,
|
|
PAGE_SIZE << order,
|
|
db->lbuf,
|
|
db->lbufDma);
|
|
}
|
|
}
|
|
if (!db->lbuf) {
|
|
ASSERT(!db->rbuf);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
db->bufOrder = order;
|
|
}
|
|
|
|
db->count = 0;
|
|
db->nextIn = db->nextOut = 0;
|
|
|
|
bufsize = PAGE_SIZE << db->bufOrder;
|
|
db->fragShift = ld2(rate * 2 / 100);
|
|
if (db->fragShift < 4) db->fragShift = 4;
|
|
|
|
db->numFrag = bufsize >> db->fragShift;
|
|
while (db->numFrag < 4 && db->fragShift > 4) {
|
|
db->fragShift--;
|
|
db->numFrag = bufsize >> db->fragShift;
|
|
}
|
|
db->fragSize = 1 << db->fragShift;
|
|
db->fragTotalSize = db->numFrag << db->fragShift;
|
|
memset(db->lbuf, 0, db->fragTotalSize);
|
|
memset(db->rbuf, 0, db->fragTotalSize);
|
|
|
|
db->ready = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int prog_dmabuf_adc(struct vrc5477_ac97_state *s)
|
|
{
|
|
stop_adc(s);
|
|
return prog_dmabuf(s, &s->dma_adc, s->adcRate);
|
|
}
|
|
|
|
static inline int prog_dmabuf_dac(struct vrc5477_ac97_state *s)
|
|
{
|
|
stop_dac(s);
|
|
return prog_dmabuf(s, &s->dma_dac, s->dacRate);
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
/* hold spinlock for the following! */
|
|
|
|
static inline void vrc5477_ac97_adc_interrupt(struct vrc5477_ac97_state *s)
|
|
{
|
|
struct dmabuf* adc = &s->dma_adc;
|
|
unsigned temp;
|
|
|
|
/* we need two frags avaiable because one is already being used
|
|
* and the other will be used when next interrupt happens.
|
|
*/
|
|
if (adc->count >= adc->fragTotalSize - adc->fragSize) {
|
|
stop_adc(s);
|
|
adc->error++;
|
|
printk(KERN_INFO PFX "adc overrun\n");
|
|
return;
|
|
}
|
|
|
|
/* set the base addr for next DMA transfer */
|
|
temp = adc->nextIn + 2*adc->fragSize;
|
|
if (temp >= adc->fragTotalSize) {
|
|
ASSERT( (temp == adc->fragTotalSize) ||
|
|
(temp == adc->fragTotalSize + adc->fragSize) );
|
|
temp -= adc->fragTotalSize;
|
|
}
|
|
outl(adc->lbufDma + temp, s->io + VRC5477_ADC1_BADDR);
|
|
outl(adc->rbufDma + temp, s->io + VRC5477_ADC2_BADDR);
|
|
|
|
/* adjust nextIn */
|
|
adc->nextIn += adc->fragSize;
|
|
if (adc->nextIn >= adc->fragTotalSize) {
|
|
ASSERT(adc->nextIn == adc->fragTotalSize);
|
|
adc->nextIn = 0;
|
|
}
|
|
|
|
/* adjust count */
|
|
adc->count += adc->fragSize;
|
|
|
|
/* wake up anybody listening */
|
|
if (waitqueue_active(&adc->wait)) {
|
|
wake_up_interruptible(&adc->wait);
|
|
}
|
|
}
|
|
|
|
static inline void vrc5477_ac97_dac_interrupt(struct vrc5477_ac97_state *s)
|
|
{
|
|
struct dmabuf* dac = &s->dma_dac;
|
|
unsigned temp;
|
|
|
|
/* next DMA transfer should already started */
|
|
// ASSERT(inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP);
|
|
// ASSERT(inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP);
|
|
|
|
/* let us set for next next DMA transfer */
|
|
temp = dac->nextOut + dac->fragSize*2;
|
|
if (temp >= dac->fragTotalSize) {
|
|
ASSERT( (temp == dac->fragTotalSize) ||
|
|
(temp == dac->fragTotalSize + dac->fragSize) );
|
|
temp -= dac->fragTotalSize;
|
|
}
|
|
outl(dac->lbufDma + temp, s->io + VRC5477_DAC1_BADDR);
|
|
if (s->dacChannels == 1) {
|
|
outl(dac->lbufDma + temp, s->io + VRC5477_DAC2_BADDR);
|
|
} else {
|
|
outl(dac->rbufDma + temp, s->io + VRC5477_DAC2_BADDR);
|
|
}
|
|
|
|
#if defined(VRC5477_AC97_VERBOSE_DEBUG)
|
|
if (*(u16*)(dac->lbuf + dac->nextOut) != outTicket) {
|
|
printk("assert fail: - %d vs %d\n",
|
|
*(u16*)(dac->lbuf + dac->nextOut),
|
|
outTicket);
|
|
ASSERT(1 == 0);
|
|
}
|
|
#endif
|
|
|
|
/* adjust nextOut pointer */
|
|
dac->nextOut += dac->fragSize;
|
|
if (dac->nextOut >= dac->fragTotalSize) {
|
|
ASSERT(dac->nextOut == dac->fragTotalSize);
|
|
dac->nextOut = 0;
|
|
}
|
|
|
|
/* adjust count */
|
|
dac->count -= dac->fragSize;
|
|
if (dac->count <=0 ) {
|
|
/* buffer under run */
|
|
dac->count = 0;
|
|
dac->nextIn = dac->nextOut;
|
|
stop_dac(s);
|
|
}
|
|
|
|
#if defined(VRC5477_AC97_VERBOSE_DEBUG)
|
|
if (dac->count) {
|
|
outTicket ++;
|
|
ASSERT(*(u16*)(dac->lbuf + dac->nextOut) == outTicket);
|
|
}
|
|
#endif
|
|
|
|
/* we cannot have both under run and someone is waiting on us */
|
|
ASSERT(! (waitqueue_active(&dac->wait) && (dac->count <= 0)) );
|
|
|
|
/* wake up anybody listening */
|
|
if (waitqueue_active(&dac->wait))
|
|
wake_up_interruptible(&dac->wait);
|
|
}
|
|
|
|
static irqreturn_t vrc5477_ac97_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)dev_id;
|
|
u32 irqStatus;
|
|
u32 adcInterrupts, dacInterrupts;
|
|
|
|
spin_lock(&s->lock);
|
|
|
|
/* get irqStatus and clear the detected ones */
|
|
irqStatus = inl(s->io + VRC5477_INT_STATUS);
|
|
outl(irqStatus, s->io + VRC5477_INT_CLR);
|
|
|
|
/* let us see what we get */
|
|
dacInterrupts = VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END;
|
|
adcInterrupts = VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END;
|
|
if (irqStatus & dacInterrupts) {
|
|
/* we should get both interrupts, but just in case ... */
|
|
if (irqStatus & VRC5477_INT_MASK_DAC1END) {
|
|
vrc5477_ac97_dac_interrupt(s);
|
|
}
|
|
if ( (irqStatus & dacInterrupts) != dacInterrupts ) {
|
|
printk(KERN_WARNING "vrc5477_ac97 : dac interrupts not in sync!!!\n");
|
|
stop_dac(s);
|
|
start_dac(s);
|
|
}
|
|
} else if (irqStatus & adcInterrupts) {
|
|
/* we should get both interrupts, but just in case ... */
|
|
if(irqStatus & VRC5477_INT_MASK_ADC1END) {
|
|
vrc5477_ac97_adc_interrupt(s);
|
|
}
|
|
if ( (irqStatus & adcInterrupts) != adcInterrupts ) {
|
|
printk(KERN_WARNING "vrc5477_ac97 : adc interrupts not in sync!!!\n");
|
|
stop_adc(s);
|
|
start_adc(s);
|
|
}
|
|
}
|
|
|
|
spin_unlock(&s->lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int vrc5477_ac97_open_mixdev(struct inode *inode, struct file *file)
|
|
{
|
|
int minor = iminor(inode);
|
|
struct list_head *list;
|
|
struct vrc5477_ac97_state *s;
|
|
|
|
for (list = devs.next; ; list = list->next) {
|
|
if (list == &devs)
|
|
return -ENODEV;
|
|
s = list_entry(list, struct vrc5477_ac97_state, devs);
|
|
if (s->codec->dev_mixer == minor)
|
|
break;
|
|
}
|
|
file->private_data = s;
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static int vrc5477_ac97_release_mixdev(struct inode *inode, struct file *file)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
return codec->mixer_ioctl(codec, cmd, arg);
|
|
}
|
|
|
|
static int vrc5477_ac97_ioctl_mixdev(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct vrc5477_ac97_state *s =
|
|
(struct vrc5477_ac97_state *)file->private_data;
|
|
struct ac97_codec *codec = s->codec;
|
|
|
|
return mixdev_ioctl(codec, cmd, arg);
|
|
}
|
|
|
|
static /*const*/ struct file_operations vrc5477_ac97_mixer_fops = {
|
|
.owner = THIS_MODULE,
|
|
.llseek = no_llseek,
|
|
.ioctl = vrc5477_ac97_ioctl_mixdev,
|
|
.open = vrc5477_ac97_open_mixdev,
|
|
.release = vrc5477_ac97_release_mixdev,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int drain_dac(struct vrc5477_ac97_state *s, int nonblock)
|
|
{
|
|
unsigned long flags;
|
|
int count, tmo;
|
|
|
|
if (!s->dma_dac.ready)
|
|
return 0;
|
|
|
|
for (;;) {
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
count = s->dma_dac.count;
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (count <= 0)
|
|
break;
|
|
if (signal_pending(current))
|
|
break;
|
|
if (nonblock)
|
|
return -EBUSY;
|
|
tmo = 1000 * count / s->dacRate / 2;
|
|
vrc5477_ac97_delay(tmo);
|
|
}
|
|
if (signal_pending(current))
|
|
return -ERESTARTSYS;
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static inline int
|
|
copy_two_channel_adc_to_user(struct vrc5477_ac97_state *s,
|
|
char *buffer,
|
|
int copyCount)
|
|
{
|
|
struct dmabuf *db = &s->dma_adc;
|
|
int bufStart = db->nextOut;
|
|
for (; copyCount > 0; ) {
|
|
int i;
|
|
int count = copyCount;
|
|
if (count > WORK_BUF_SIZE/2) count = WORK_BUF_SIZE/2;
|
|
for (i=0; i< count/2; i++) {
|
|
s->workBuf[i].lchannel =
|
|
*(u16*)(db->lbuf + bufStart + i*2);
|
|
s->workBuf[i].rchannel =
|
|
*(u16*)(db->rbuf + bufStart + i*2);
|
|
}
|
|
if (copy_to_user(buffer, s->workBuf, count*2)) {
|
|
return -1;
|
|
}
|
|
|
|
copyCount -= count;
|
|
bufStart += count;
|
|
ASSERT(bufStart <= db->fragTotalSize);
|
|
buffer += count *2;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* return the total bytes that is copied */
|
|
static inline int
|
|
copy_adc_to_user(struct vrc5477_ac97_state *s,
|
|
char * buffer,
|
|
size_t count,
|
|
int avail)
|
|
{
|
|
struct dmabuf *db = &s->dma_adc;
|
|
int copyCount=0;
|
|
int copyFragCount=0;
|
|
int totalCopyCount = 0;
|
|
int totalCopyFragCount = 0;
|
|
unsigned long flags;
|
|
|
|
/* adjust count to signel channel byte count */
|
|
count >>= s->adcChannels - 1;
|
|
|
|
/* we may have to "copy" twice as ring buffer wraps around */
|
|
for (; (avail > 0) && (count > 0); ) {
|
|
/* determine max possible copy count for single channel */
|
|
copyCount = count;
|
|
if (copyCount > avail) {
|
|
copyCount = avail;
|
|
}
|
|
if (copyCount + db->nextOut > db->fragTotalSize) {
|
|
copyCount = db->fragTotalSize - db->nextOut;
|
|
ASSERT((copyCount % db->fragSize) == 0);
|
|
}
|
|
|
|
copyFragCount = (copyCount-1) >> db->fragShift;
|
|
copyFragCount = (copyFragCount+1) << db->fragShift;
|
|
ASSERT(copyFragCount >= copyCount);
|
|
|
|
/* we copy differently based on adc channels */
|
|
if (s->adcChannels == 1) {
|
|
if (copy_to_user(buffer,
|
|
db->lbuf + db->nextOut,
|
|
copyCount))
|
|
return -1;
|
|
} else {
|
|
/* *sigh* we have to mix two streams into one */
|
|
if (copy_two_channel_adc_to_user(s, buffer, copyCount))
|
|
return -1;
|
|
}
|
|
|
|
count -= copyCount;
|
|
totalCopyCount += copyCount;
|
|
avail -= copyFragCount;
|
|
totalCopyFragCount += copyFragCount;
|
|
|
|
buffer += copyCount << (s->adcChannels-1);
|
|
|
|
db->nextOut += copyFragCount;
|
|
if (db->nextOut >= db->fragTotalSize) {
|
|
ASSERT(db->nextOut == db->fragTotalSize);
|
|
db->nextOut = 0;
|
|
}
|
|
|
|
ASSERT((copyFragCount % db->fragSize) == 0);
|
|
ASSERT( (count == 0) || (copyCount == copyFragCount));
|
|
}
|
|
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
db->count -= totalCopyFragCount;
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
|
|
return totalCopyCount << (s->adcChannels-1);
|
|
}
|
|
|
|
static ssize_t
|
|
vrc5477_ac97_read(struct file *file,
|
|
char *buffer,
|
|
size_t count,
|
|
loff_t *ppos)
|
|
{
|
|
struct vrc5477_ac97_state *s =
|
|
(struct vrc5477_ac97_state *)file->private_data;
|
|
struct dmabuf *db = &s->dma_adc;
|
|
ssize_t ret = 0;
|
|
unsigned long flags;
|
|
int copyCount;
|
|
size_t avail;
|
|
|
|
if (!access_ok(VERIFY_WRITE, buffer, count))
|
|
return -EFAULT;
|
|
|
|
ASSERT(db->ready);
|
|
|
|
while (count > 0) {
|
|
// wait for samples in capture buffer
|
|
do {
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
if (db->stopped)
|
|
start_adc(s);
|
|
avail = db->count;
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (avail <= 0) {
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
if (!ret)
|
|
ret = -EAGAIN;
|
|
return ret;
|
|
}
|
|
interruptible_sleep_on(&db->wait);
|
|
if (signal_pending(current)) {
|
|
if (!ret)
|
|
ret = -ERESTARTSYS;
|
|
return ret;
|
|
}
|
|
}
|
|
} while (avail <= 0);
|
|
|
|
ASSERT( (avail % db->fragSize) == 0);
|
|
copyCount = copy_adc_to_user(s, buffer, count, avail);
|
|
if (copyCount <=0 ) {
|
|
if (!ret) ret = -EFAULT;
|
|
return ret;
|
|
}
|
|
|
|
count -= copyCount;
|
|
buffer += copyCount;
|
|
ret += copyCount;
|
|
} // while (count > 0)
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline int
|
|
copy_two_channel_dac_from_user(struct vrc5477_ac97_state *s,
|
|
const char *buffer,
|
|
int copyCount)
|
|
{
|
|
struct dmabuf *db = &s->dma_dac;
|
|
int bufStart = db->nextIn;
|
|
|
|
ASSERT(db->ready);
|
|
|
|
for (; copyCount > 0; ) {
|
|
int i;
|
|
int count = copyCount;
|
|
if (count > WORK_BUF_SIZE/2) count = WORK_BUF_SIZE/2;
|
|
if (copy_from_user(s->workBuf, buffer, count*2)) {
|
|
return -1;
|
|
}
|
|
for (i=0; i< count/2; i++) {
|
|
*(u16*)(db->lbuf + bufStart + i*2) =
|
|
s->workBuf[i].lchannel;
|
|
*(u16*)(db->rbuf + bufStart + i*2) =
|
|
s->workBuf[i].rchannel;
|
|
}
|
|
|
|
copyCount -= count;
|
|
bufStart += count;
|
|
ASSERT(bufStart <= db->fragTotalSize);
|
|
buffer += count *2;
|
|
}
|
|
return 0;
|
|
|
|
}
|
|
|
|
/* return the total bytes that is copied */
|
|
static inline int
|
|
copy_dac_from_user(struct vrc5477_ac97_state *s,
|
|
const char *buffer,
|
|
size_t count,
|
|
int avail)
|
|
{
|
|
struct dmabuf *db = &s->dma_dac;
|
|
int copyCount=0;
|
|
int copyFragCount=0;
|
|
int totalCopyCount = 0;
|
|
int totalCopyFragCount = 0;
|
|
unsigned long flags;
|
|
#if defined(VRC5477_AC97_VERBOSE_DEBUG)
|
|
int i;
|
|
#endif
|
|
|
|
/* adjust count to signel channel byte count */
|
|
count >>= s->dacChannels - 1;
|
|
|
|
/* we may have to "copy" twice as ring buffer wraps around */
|
|
for (; (avail > 0) && (count > 0); ) {
|
|
/* determine max possible copy count for single channel */
|
|
copyCount = count;
|
|
if (copyCount > avail) {
|
|
copyCount = avail;
|
|
}
|
|
if (copyCount + db->nextIn > db->fragTotalSize) {
|
|
copyCount = db->fragTotalSize - db->nextIn;
|
|
ASSERT(copyCount > 0);
|
|
}
|
|
|
|
copyFragCount = copyCount;
|
|
ASSERT(copyFragCount >= copyCount);
|
|
|
|
/* we copy differently based on the number channels */
|
|
if (s->dacChannels == 1) {
|
|
if (copy_from_user(db->lbuf + db->nextIn,
|
|
buffer,
|
|
copyCount))
|
|
return -1;
|
|
/* fill gaps with 0 */
|
|
memset(db->lbuf + db->nextIn + copyCount,
|
|
0,
|
|
copyFragCount - copyCount);
|
|
} else {
|
|
/* we have demux the stream into two separate ones */
|
|
if (copy_two_channel_dac_from_user(s, buffer, copyCount))
|
|
return -1;
|
|
/* fill gaps with 0 */
|
|
memset(db->lbuf + db->nextIn + copyCount,
|
|
0,
|
|
copyFragCount - copyCount);
|
|
memset(db->rbuf + db->nextIn + copyCount,
|
|
0,
|
|
copyFragCount - copyCount);
|
|
}
|
|
|
|
#if defined(VRC5477_AC97_VERBOSE_DEBUG)
|
|
for (i=0; i< copyFragCount; i+= db->fragSize) {
|
|
*(u16*)(db->lbuf + db->nextIn + i) = inTicket ++;
|
|
}
|
|
#endif
|
|
|
|
count -= copyCount;
|
|
totalCopyCount += copyCount;
|
|
avail -= copyFragCount;
|
|
totalCopyFragCount += copyFragCount;
|
|
|
|
buffer += copyCount << (s->dacChannels - 1);
|
|
|
|
db->nextIn += copyFragCount;
|
|
if (db->nextIn >= db->fragTotalSize) {
|
|
ASSERT(db->nextIn == db->fragTotalSize);
|
|
db->nextIn = 0;
|
|
}
|
|
|
|
ASSERT( (count == 0) || (copyCount == copyFragCount));
|
|
}
|
|
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
db->count += totalCopyFragCount;
|
|
if (db->stopped) {
|
|
start_dac(s);
|
|
}
|
|
|
|
/* nextIn should not be equal to nextOut unless we are full */
|
|
ASSERT( ( (db->count == db->fragTotalSize) &&
|
|
(db->nextIn == db->nextOut) ) ||
|
|
( (db->count < db->fragTotalSize) &&
|
|
(db->nextIn != db->nextOut) ) );
|
|
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
|
|
return totalCopyCount << (s->dacChannels-1);
|
|
|
|
}
|
|
|
|
static ssize_t vrc5477_ac97_write(struct file *file, const char *buffer,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct vrc5477_ac97_state *s =
|
|
(struct vrc5477_ac97_state *)file->private_data;
|
|
struct dmabuf *db = &s->dma_dac;
|
|
ssize_t ret;
|
|
unsigned long flags;
|
|
int copyCount, avail;
|
|
|
|
if (!access_ok(VERIFY_READ, buffer, count))
|
|
return -EFAULT;
|
|
ret = 0;
|
|
|
|
while (count > 0) {
|
|
// wait for space in playback buffer
|
|
do {
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
avail = db->fragTotalSize - db->count;
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (avail <= 0) {
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
if (!ret)
|
|
ret = -EAGAIN;
|
|
return ret;
|
|
}
|
|
interruptible_sleep_on(&db->wait);
|
|
if (signal_pending(current)) {
|
|
if (!ret)
|
|
ret = -ERESTARTSYS;
|
|
return ret;
|
|
}
|
|
}
|
|
} while (avail <= 0);
|
|
|
|
copyCount = copy_dac_from_user(s, buffer, count, avail);
|
|
if (copyCount < 0) {
|
|
if (!ret) ret = -EFAULT;
|
|
return ret;
|
|
}
|
|
|
|
count -= copyCount;
|
|
buffer += copyCount;
|
|
ret += copyCount;
|
|
} // while (count > 0)
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* No kernel lock - we have our own spinlock */
|
|
static unsigned int vrc5477_ac97_poll(struct file *file,
|
|
struct poll_table_struct *wait)
|
|
{
|
|
struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data;
|
|
unsigned long flags;
|
|
unsigned int mask = 0;
|
|
|
|
if (file->f_mode & FMODE_WRITE)
|
|
poll_wait(file, &s->dma_dac.wait, wait);
|
|
if (file->f_mode & FMODE_READ)
|
|
poll_wait(file, &s->dma_adc.wait, wait);
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
if (file->f_mode & FMODE_READ) {
|
|
if (s->dma_adc.count >= (signed)s->dma_adc.fragSize)
|
|
mask |= POLLIN | POLLRDNORM;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
if ((signed)s->dma_dac.fragTotalSize >=
|
|
s->dma_dac.count + (signed)s->dma_dac.fragSize)
|
|
mask |= POLLOUT | POLLWRNORM;
|
|
}
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
return mask;
|
|
}
|
|
|
|
#ifdef VRC5477_AC97_DEBUG
|
|
static struct ioctl_str_t {
|
|
unsigned int cmd;
|
|
const char* str;
|
|
} ioctl_str[] = {
|
|
{SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
|
|
{SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
|
|
{SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
|
|
{SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
|
|
{SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
|
|
{SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
|
|
{SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
|
|
{SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
|
|
{SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
|
|
{SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
|
|
{SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
|
|
{SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
|
|
{SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
|
|
{SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
|
|
{SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
|
|
{SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
|
|
{SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
|
|
{SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
|
|
{SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
|
|
{SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
|
|
{SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
|
|
{SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
|
|
{SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
|
|
{SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
|
|
{SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
|
|
{SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
|
|
{SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
|
|
{SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
|
|
{SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
|
|
{OSS_GETVERSION, "OSS_GETVERSION"},
|
|
{SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
|
|
{SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
|
|
{SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
|
|
{SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
|
|
};
|
|
#endif
|
|
|
|
static int vrc5477_ac97_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data;
|
|
unsigned long flags;
|
|
audio_buf_info abinfo;
|
|
int count;
|
|
int val, ret;
|
|
|
|
#ifdef VRC5477_AC97_DEBUG
|
|
for (count=0; count<sizeof(ioctl_str)/sizeof(ioctl_str[0]); count++) {
|
|
if (ioctl_str[count].cmd == cmd)
|
|
break;
|
|
}
|
|
if (count < sizeof(ioctl_str)/sizeof(ioctl_str[0]))
|
|
printk(KERN_INFO PFX "ioctl %s\n", ioctl_str[count].str);
|
|
else
|
|
printk(KERN_INFO PFX "ioctl unknown, 0x%x\n", cmd);
|
|
#endif
|
|
|
|
switch (cmd) {
|
|
case OSS_GETVERSION:
|
|
return put_user(SOUND_VERSION, (int *)arg);
|
|
|
|
case SNDCTL_DSP_SYNC:
|
|
if (file->f_mode & FMODE_WRITE)
|
|
return drain_dac(s, file->f_flags & O_NONBLOCK);
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_SETDUPLEX:
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_GETCAPS:
|
|
return put_user(DSP_CAP_DUPLEX, (int *)arg);
|
|
|
|
case SNDCTL_DSP_RESET:
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
synchronize_irq(s->irq);
|
|
s->dma_dac.count = 0;
|
|
s->dma_dac.nextIn = s->dma_dac.nextOut = 0;
|
|
}
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
synchronize_irq(s->irq);
|
|
s->dma_adc.count = 0;
|
|
s->dma_adc.nextIn = s->dma_adc.nextOut = 0;
|
|
}
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_SPEED:
|
|
if (get_user(val, (int *)arg))
|
|
return -EFAULT;
|
|
if (val >= 0) {
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
set_adc_rate(s, val);
|
|
if ((ret = prog_dmabuf_adc(s)))
|
|
return ret;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
set_dac_rate(s, val);
|
|
if ((ret = prog_dmabuf_dac(s)))
|
|
return ret;
|
|
}
|
|
}
|
|
return put_user((file->f_mode & FMODE_READ) ?
|
|
s->adcRate : s->dacRate, (int *)arg);
|
|
|
|
case SNDCTL_DSP_STEREO:
|
|
if (get_user(val, (int *)arg))
|
|
return -EFAULT;
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
if (val)
|
|
s->adcChannels = 2;
|
|
else
|
|
s->adcChannels = 1;
|
|
if ((ret = prog_dmabuf_adc(s)))
|
|
return ret;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
if (val)
|
|
s->dacChannels = 2;
|
|
else
|
|
s->dacChannels = 1;
|
|
if ((ret = prog_dmabuf_dac(s)))
|
|
return ret;
|
|
}
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_CHANNELS:
|
|
if (get_user(val, (int *)arg))
|
|
return -EFAULT;
|
|
if (val != 0) {
|
|
if ( (val != 1) && (val != 2)) val = 2;
|
|
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
s->dacChannels = val;
|
|
if ((ret = prog_dmabuf_adc(s)))
|
|
return ret;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
s->dacChannels = val;
|
|
if ((ret = prog_dmabuf_dac(s)))
|
|
return ret;
|
|
}
|
|
}
|
|
return put_user(val, (int *)arg);
|
|
|
|
case SNDCTL_DSP_GETFMTS: /* Returns a mask */
|
|
return put_user(AFMT_S16_LE, (int *)arg);
|
|
|
|
case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
|
|
if (get_user(val, (int *)arg))
|
|
return -EFAULT;
|
|
if (val != AFMT_QUERY) {
|
|
if (val != AFMT_S16_LE) return -EINVAL;
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
if ((ret = prog_dmabuf_adc(s)))
|
|
return ret;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
if ((ret = prog_dmabuf_dac(s)))
|
|
return ret;
|
|
}
|
|
} else {
|
|
val = AFMT_S16_LE;
|
|
}
|
|
return put_user(val, (int *)arg);
|
|
|
|
case SNDCTL_DSP_POST:
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_GETTRIGGER:
|
|
case SNDCTL_DSP_SETTRIGGER:
|
|
/* NO trigger */
|
|
return -EINVAL;
|
|
|
|
case SNDCTL_DSP_GETOSPACE:
|
|
if (!(file->f_mode & FMODE_WRITE))
|
|
return -EINVAL;
|
|
abinfo.fragsize = s->dma_dac.fragSize << (s->dacChannels-1);
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
count = s->dma_dac.count;
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
abinfo.bytes = (s->dma_dac.fragTotalSize - count) <<
|
|
(s->dacChannels-1);
|
|
abinfo.fragstotal = s->dma_dac.numFrag;
|
|
abinfo.fragments = abinfo.bytes >> s->dma_dac.fragShift >>
|
|
(s->dacChannels-1);
|
|
return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
|
|
|
|
case SNDCTL_DSP_GETISPACE:
|
|
if (!(file->f_mode & FMODE_READ))
|
|
return -EINVAL;
|
|
abinfo.fragsize = s->dma_adc.fragSize << (s->adcChannels-1);
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
count = s->dma_adc.count;
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
if (count < 0)
|
|
count = 0;
|
|
abinfo.bytes = count << (s->adcChannels-1);
|
|
abinfo.fragstotal = s->dma_adc.numFrag;
|
|
abinfo.fragments = (abinfo.bytes >> s->dma_adc.fragShift) >>
|
|
(s->adcChannels-1);
|
|
return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
|
|
|
|
case SNDCTL_DSP_NONBLOCK:
|
|
file->f_flags |= O_NONBLOCK;
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_GETODELAY:
|
|
if (!(file->f_mode & FMODE_WRITE))
|
|
return -EINVAL;
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
count = s->dma_dac.count;
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
return put_user(count, (int *)arg);
|
|
|
|
case SNDCTL_DSP_GETIPTR:
|
|
case SNDCTL_DSP_GETOPTR:
|
|
/* we cannot get DMA ptr */
|
|
return -EINVAL;
|
|
|
|
case SNDCTL_DSP_GETBLKSIZE:
|
|
if (file->f_mode & FMODE_WRITE)
|
|
return put_user(s->dma_dac.fragSize << (s->dacChannels-1), (int *)arg);
|
|
else
|
|
return put_user(s->dma_adc.fragSize << (s->adcChannels-1), (int *)arg);
|
|
|
|
case SNDCTL_DSP_SETFRAGMENT:
|
|
/* we ignore fragment size request */
|
|
return 0;
|
|
|
|
case SNDCTL_DSP_SUBDIVIDE:
|
|
/* what is this for? [jsun] */
|
|
return 0;
|
|
|
|
case SOUND_PCM_READ_RATE:
|
|
return put_user((file->f_mode & FMODE_READ) ?
|
|
s->adcRate : s->dacRate, (int *)arg);
|
|
|
|
case SOUND_PCM_READ_CHANNELS:
|
|
if (file->f_mode & FMODE_READ)
|
|
return put_user(s->adcChannels, (int *)arg);
|
|
else
|
|
return put_user(s->dacChannels ? 2 : 1, (int *)arg);
|
|
|
|
case SOUND_PCM_READ_BITS:
|
|
return put_user(16, (int *)arg);
|
|
|
|
case SOUND_PCM_WRITE_FILTER:
|
|
case SNDCTL_DSP_SETSYNCRO:
|
|
case SOUND_PCM_READ_FILTER:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return mixdev_ioctl(s->codec, cmd, arg);
|
|
}
|
|
|
|
|
|
static int vrc5477_ac97_open(struct inode *inode, struct file *file)
|
|
{
|
|
int minor = iminor(inode);
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
unsigned long flags;
|
|
struct list_head *list;
|
|
struct vrc5477_ac97_state *s;
|
|
int ret=0;
|
|
|
|
nonseekable_open(inode, file);
|
|
for (list = devs.next; ; list = list->next) {
|
|
if (list == &devs)
|
|
return -ENODEV;
|
|
s = list_entry(list, struct vrc5477_ac97_state, devs);
|
|
if (!((s->dev_audio ^ minor) & ~0xf))
|
|
break;
|
|
}
|
|
file->private_data = s;
|
|
|
|
/* wait for device to become free */
|
|
down(&s->open_sem);
|
|
while (s->open_mode & file->f_mode) {
|
|
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
up(&s->open_sem);
|
|
return -EBUSY;
|
|
}
|
|
add_wait_queue(&s->open_wait, &wait);
|
|
__set_current_state(TASK_INTERRUPTIBLE);
|
|
up(&s->open_sem);
|
|
schedule();
|
|
remove_wait_queue(&s->open_wait, &wait);
|
|
set_current_state(TASK_RUNNING);
|
|
if (signal_pending(current))
|
|
return -ERESTARTSYS;
|
|
down(&s->open_sem);
|
|
}
|
|
|
|
spin_lock_irqsave(&s->lock, flags);
|
|
|
|
if (file->f_mode & FMODE_READ) {
|
|
/* set default settings */
|
|
set_adc_rate(s, 48000);
|
|
s->adcChannels = 2;
|
|
|
|
ret = prog_dmabuf_adc(s);
|
|
if (ret) goto bailout;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
/* set default settings */
|
|
set_dac_rate(s, 48000);
|
|
s->dacChannels = 2;
|
|
|
|
ret = prog_dmabuf_dac(s);
|
|
if (ret) goto bailout;
|
|
}
|
|
|
|
s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
|
|
|
|
bailout:
|
|
spin_unlock_irqrestore(&s->lock, flags);
|
|
|
|
up(&s->open_sem);
|
|
return ret;
|
|
}
|
|
|
|
static int vrc5477_ac97_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct vrc5477_ac97_state *s =
|
|
(struct vrc5477_ac97_state *)file->private_data;
|
|
|
|
lock_kernel();
|
|
if (file->f_mode & FMODE_WRITE)
|
|
drain_dac(s, file->f_flags & O_NONBLOCK);
|
|
down(&s->open_sem);
|
|
if (file->f_mode & FMODE_WRITE) {
|
|
stop_dac(s);
|
|
dealloc_dmabuf(s, &s->dma_dac);
|
|
}
|
|
if (file->f_mode & FMODE_READ) {
|
|
stop_adc(s);
|
|
dealloc_dmabuf(s, &s->dma_adc);
|
|
}
|
|
s->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
|
|
up(&s->open_sem);
|
|
wake_up(&s->open_wait);
|
|
unlock_kernel();
|
|
return 0;
|
|
}
|
|
|
|
static /*const*/ struct file_operations vrc5477_ac97_audio_fops = {
|
|
.owner = THIS_MODULE,
|
|
.llseek = no_llseek,
|
|
.read = vrc5477_ac97_read,
|
|
.write = vrc5477_ac97_write,
|
|
.poll = vrc5477_ac97_poll,
|
|
.ioctl = vrc5477_ac97_ioctl,
|
|
// .mmap = vrc5477_ac97_mmap,
|
|
.open = vrc5477_ac97_open,
|
|
.release = vrc5477_ac97_release,
|
|
};
|
|
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* for debugging purposes, we'll create a proc device that dumps the
|
|
* CODEC chipstate
|
|
*/
|
|
|
|
#ifdef VRC5477_AC97_DEBUG
|
|
|
|
struct {
|
|
const char *regname;
|
|
unsigned regaddr;
|
|
} vrc5477_ac97_regs[] = {
|
|
{"VRC5477_INT_STATUS", VRC5477_INT_STATUS},
|
|
{"VRC5477_CODEC_WR", VRC5477_CODEC_WR},
|
|
{"VRC5477_CODEC_RD", VRC5477_CODEC_RD},
|
|
{"VRC5477_CTRL", VRC5477_CTRL},
|
|
{"VRC5477_ACLINK_CTRL", VRC5477_ACLINK_CTRL},
|
|
{"VRC5477_INT_MASK", VRC5477_INT_MASK},
|
|
{"VRC5477_DAC1_CTRL", VRC5477_DAC1_CTRL},
|
|
{"VRC5477_DAC1L", VRC5477_DAC1L},
|
|
{"VRC5477_DAC1_BADDR", VRC5477_DAC1_BADDR},
|
|
{"VRC5477_DAC2_CTRL", VRC5477_DAC2_CTRL},
|
|
{"VRC5477_DAC2L", VRC5477_DAC2L},
|
|
{"VRC5477_DAC2_BADDR", VRC5477_DAC2_BADDR},
|
|
{"VRC5477_DAC3_CTRL", VRC5477_DAC3_CTRL},
|
|
{"VRC5477_DAC3L", VRC5477_DAC3L},
|
|
{"VRC5477_DAC3_BADDR", VRC5477_DAC3_BADDR},
|
|
{"VRC5477_ADC1_CTRL", VRC5477_ADC1_CTRL},
|
|
{"VRC5477_ADC1L", VRC5477_ADC1L},
|
|
{"VRC5477_ADC1_BADDR", VRC5477_ADC1_BADDR},
|
|
{"VRC5477_ADC2_CTRL", VRC5477_ADC2_CTRL},
|
|
{"VRC5477_ADC2L", VRC5477_ADC2L},
|
|
{"VRC5477_ADC2_BADDR", VRC5477_ADC2_BADDR},
|
|
{"VRC5477_ADC3_CTRL", VRC5477_ADC3_CTRL},
|
|
{"VRC5477_ADC3L", VRC5477_ADC3L},
|
|
{"VRC5477_ADC3_BADDR", VRC5477_ADC3_BADDR},
|
|
{NULL, 0x0}
|
|
};
|
|
|
|
static int proc_vrc5477_ac97_dump (char *buf, char **start, off_t fpos,
|
|
int length, int *eof, void *data)
|
|
{
|
|
struct vrc5477_ac97_state *s;
|
|
int cnt, len = 0;
|
|
|
|
if (list_empty(&devs))
|
|
return 0;
|
|
s = list_entry(devs.next, struct vrc5477_ac97_state, devs);
|
|
|
|
/* print out header */
|
|
len += sprintf(buf + len, "\n\t\tVrc5477 Audio Debug\n\n");
|
|
|
|
// print out digital controller state
|
|
len += sprintf (buf + len, "NEC Vrc5477 Audio Controller registers\n");
|
|
len += sprintf (buf + len, "---------------------------------\n");
|
|
for (cnt=0; vrc5477_ac97_regs[cnt].regname != NULL; cnt++) {
|
|
len+= sprintf (buf + len, "%-20s = %08x\n",
|
|
vrc5477_ac97_regs[cnt].regname,
|
|
inl(s->io + vrc5477_ac97_regs[cnt].regaddr));
|
|
}
|
|
|
|
/* print out driver state */
|
|
len += sprintf (buf + len, "NEC Vrc5477 Audio driver states\n");
|
|
len += sprintf (buf + len, "---------------------------------\n");
|
|
len += sprintf (buf + len, "dacChannels = %d\n", s->dacChannels);
|
|
len += sprintf (buf + len, "adcChannels = %d\n", s->adcChannels);
|
|
len += sprintf (buf + len, "dacRate = %d\n", s->dacRate);
|
|
len += sprintf (buf + len, "adcRate = %d\n", s->adcRate);
|
|
|
|
len += sprintf (buf + len, "dma_dac is %s ready\n",
|
|
s->dma_dac.ready? "" : "not");
|
|
if (s->dma_dac.ready) {
|
|
len += sprintf (buf + len, "dma_dac is %s stopped.\n",
|
|
s->dma_dac.stopped? "" : "not");
|
|
len += sprintf (buf + len, "dma_dac.fragSize = %x\n",
|
|
s->dma_dac.fragSize);
|
|
len += sprintf (buf + len, "dma_dac.fragShift = %x\n",
|
|
s->dma_dac.fragShift);
|
|
len += sprintf (buf + len, "dma_dac.numFrag = %x\n",
|
|
s->dma_dac.numFrag);
|
|
len += sprintf (buf + len, "dma_dac.fragTotalSize = %x\n",
|
|
s->dma_dac.fragTotalSize);
|
|
len += sprintf (buf + len, "dma_dac.nextIn = %x\n",
|
|
s->dma_dac.nextIn);
|
|
len += sprintf (buf + len, "dma_dac.nextOut = %x\n",
|
|
s->dma_dac.nextOut);
|
|
len += sprintf (buf + len, "dma_dac.count = %x\n",
|
|
s->dma_dac.count);
|
|
}
|
|
|
|
len += sprintf (buf + len, "dma_adc is %s ready\n",
|
|
s->dma_adc.ready? "" : "not");
|
|
if (s->dma_adc.ready) {
|
|
len += sprintf (buf + len, "dma_adc is %s stopped.\n",
|
|
s->dma_adc.stopped? "" : "not");
|
|
len += sprintf (buf + len, "dma_adc.fragSize = %x\n",
|
|
s->dma_adc.fragSize);
|
|
len += sprintf (buf + len, "dma_adc.fragShift = %x\n",
|
|
s->dma_adc.fragShift);
|
|
len += sprintf (buf + len, "dma_adc.numFrag = %x\n",
|
|
s->dma_adc.numFrag);
|
|
len += sprintf (buf + len, "dma_adc.fragTotalSize = %x\n",
|
|
s->dma_adc.fragTotalSize);
|
|
len += sprintf (buf + len, "dma_adc.nextIn = %x\n",
|
|
s->dma_adc.nextIn);
|
|
len += sprintf (buf + len, "dma_adc.nextOut = %x\n",
|
|
s->dma_adc.nextOut);
|
|
len += sprintf (buf + len, "dma_adc.count = %x\n",
|
|
s->dma_adc.count);
|
|
}
|
|
|
|
/* print out CODEC state */
|
|
len += sprintf (buf + len, "\nAC97 CODEC registers\n");
|
|
len += sprintf (buf + len, "----------------------\n");
|
|
for (cnt=0; cnt <= 0x7e; cnt = cnt +2)
|
|
len+= sprintf (buf + len, "reg %02x = %04x\n",
|
|
cnt, rdcodec(s->codec, cnt));
|
|
|
|
if (fpos >=len){
|
|
*start = buf;
|
|
*eof =1;
|
|
return 0;
|
|
}
|
|
*start = buf + fpos;
|
|
if ((len -= fpos) > length)
|
|
return length;
|
|
*eof =1;
|
|
return len;
|
|
|
|
}
|
|
#endif /* VRC5477_AC97_DEBUG */
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
/* maximum number of devices; only used for command line params */
|
|
#define NR_DEVICE 5
|
|
|
|
static unsigned int devindex;
|
|
|
|
MODULE_AUTHOR("Monta Vista Software, jsun@mvista.com or jsun@junsun.net");
|
|
MODULE_DESCRIPTION("NEC Vrc5477 audio (AC97) Driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int __devinit vrc5477_ac97_probe(struct pci_dev *pcidev,
|
|
const struct pci_device_id *pciid)
|
|
{
|
|
struct vrc5477_ac97_state *s;
|
|
#ifdef VRC5477_AC97_DEBUG
|
|
char proc_str[80];
|
|
#endif
|
|
|
|
if (pcidev->irq == 0)
|
|
return -1;
|
|
|
|
if (!(s = kmalloc(sizeof(struct vrc5477_ac97_state), GFP_KERNEL))) {
|
|
printk(KERN_ERR PFX "alloc of device struct failed\n");
|
|
return -1;
|
|
}
|
|
memset(s, 0, sizeof(struct vrc5477_ac97_state));
|
|
|
|
init_waitqueue_head(&s->dma_adc.wait);
|
|
init_waitqueue_head(&s->dma_dac.wait);
|
|
init_waitqueue_head(&s->open_wait);
|
|
init_MUTEX(&s->open_sem);
|
|
spin_lock_init(&s->lock);
|
|
|
|
s->dev = pcidev;
|
|
s->io = pci_resource_start(pcidev, 0);
|
|
s->irq = pcidev->irq;
|
|
|
|
s->codec = ac97_alloc_codec();
|
|
|
|
s->codec->private_data = s;
|
|
s->codec->id = 0;
|
|
s->codec->codec_read = rdcodec;
|
|
s->codec->codec_write = wrcodec;
|
|
s->codec->codec_wait = waitcodec;
|
|
|
|
/* setting some other default values such as
|
|
* adcChannels, adcRate is done in open() so that
|
|
* no persistent state across file opens.
|
|
*/
|
|
|
|
/* test if get response from ac97, if not return */
|
|
if (ac97_codec_not_present(s->codec)) {
|
|
printk(KERN_ERR PFX "no ac97 codec\n");
|
|
goto err_region;
|
|
|
|
}
|
|
|
|
/* test if get response from ac97, if not return */
|
|
if (ac97_codec_not_present(&(s->codec))) {
|
|
printk(KERN_ERR PFX "no ac97 codec\n");
|
|
goto err_region;
|
|
|
|
}
|
|
|
|
if (!request_region(s->io, pci_resource_len(pcidev,0),
|
|
VRC5477_AC97_MODULE_NAME)) {
|
|
printk(KERN_ERR PFX "io ports %#lx->%#lx in use\n",
|
|
s->io, s->io + pci_resource_len(pcidev,0)-1);
|
|
goto err_region;
|
|
}
|
|
if (request_irq(s->irq, vrc5477_ac97_interrupt, SA_INTERRUPT,
|
|
VRC5477_AC97_MODULE_NAME, s)) {
|
|
printk(KERN_ERR PFX "irq %u in use\n", s->irq);
|
|
goto err_irq;
|
|
}
|
|
|
|
printk(KERN_INFO PFX "IO at %#lx, IRQ %d\n", s->io, s->irq);
|
|
|
|
/* register devices */
|
|
if ((s->dev_audio = register_sound_dsp(&vrc5477_ac97_audio_fops, -1)) < 0)
|
|
goto err_dev1;
|
|
if ((s->codec->dev_mixer =
|
|
register_sound_mixer(&vrc5477_ac97_mixer_fops, -1)) < 0)
|
|
goto err_dev2;
|
|
|
|
#ifdef VRC5477_AC97_DEBUG
|
|
/* initialize the debug proc device */
|
|
s->ps = create_proc_read_entry(VRC5477_AC97_MODULE_NAME, 0, NULL,
|
|
proc_vrc5477_ac97_dump, NULL);
|
|
#endif /* VRC5477_AC97_DEBUG */
|
|
|
|
/* enable pci io and bus mastering */
|
|
if (pci_enable_device(pcidev))
|
|
goto err_dev3;
|
|
pci_set_master(pcidev);
|
|
|
|
/* cold reset the AC97 */
|
|
outl(VRC5477_ACLINK_CTRL_RST_ON | VRC5477_ACLINK_CTRL_RST_TIME,
|
|
s->io + VRC5477_ACLINK_CTRL);
|
|
while (inl(s->io + VRC5477_ACLINK_CTRL) & VRC5477_ACLINK_CTRL_RST_ON);
|
|
|
|
/* codec init */
|
|
if (!ac97_probe_codec(s->codec))
|
|
goto err_dev3;
|
|
|
|
#ifdef VRC5477_AC97_DEBUG
|
|
sprintf(proc_str, "driver/%s/%d/ac97",
|
|
VRC5477_AC97_MODULE_NAME, s->codec->id);
|
|
s->ac97_ps = create_proc_read_entry (proc_str, 0, NULL,
|
|
ac97_read_proc, s->codec);
|
|
/* TODO : why this proc file does not show up? */
|
|
#endif
|
|
|
|
/* Try to enable variable rate audio mode. */
|
|
wrcodec(s->codec, AC97_EXTENDED_STATUS,
|
|
rdcodec(s->codec, AC97_EXTENDED_STATUS) | AC97_EXTSTAT_VRA);
|
|
/* Did we enable it? */
|
|
if(rdcodec(s->codec, AC97_EXTENDED_STATUS) & AC97_EXTSTAT_VRA)
|
|
s->extended_status |= AC97_EXTSTAT_VRA;
|
|
else {
|
|
s->dacRate = 48000;
|
|
printk(KERN_INFO PFX "VRA mode not enabled; rate fixed at %d.",
|
|
s->dacRate);
|
|
}
|
|
|
|
/* let us get the default volumne louder */
|
|
wrcodec(s->codec, 0x2, 0x1010); /* master volume, middle */
|
|
wrcodec(s->codec, 0xc, 0x10); /* phone volume, middle */
|
|
// wrcodec(s->codec, 0xe, 0x10); /* misc volume, middle */
|
|
wrcodec(s->codec, 0x10, 0x8000); /* line-in 2 line-out disable */
|
|
wrcodec(s->codec, 0x18, 0x0707); /* PCM out (line out) middle */
|
|
|
|
|
|
/* by default we select line in the input */
|
|
wrcodec(s->codec, 0x1a, 0x0404);
|
|
wrcodec(s->codec, 0x1c, 0x0f0f);
|
|
wrcodec(s->codec, 0x1e, 0x07);
|
|
|
|
/* enable the master interrupt but disable all others */
|
|
outl(VRC5477_INT_MASK_NMASK, s->io + VRC5477_INT_MASK);
|
|
|
|
/* store it in the driver field */
|
|
pci_set_drvdata(pcidev, s);
|
|
pcidev->dma_mask = 0xffffffff;
|
|
/* put it into driver list */
|
|
list_add_tail(&s->devs, &devs);
|
|
/* increment devindex */
|
|
if (devindex < NR_DEVICE-1)
|
|
devindex++;
|
|
return 0;
|
|
|
|
err_dev3:
|
|
unregister_sound_mixer(s->codec->dev_mixer);
|
|
err_dev2:
|
|
unregister_sound_dsp(s->dev_audio);
|
|
err_dev1:
|
|
printk(KERN_ERR PFX "cannot register misc device\n");
|
|
free_irq(s->irq, s);
|
|
err_irq:
|
|
release_region(s->io, pci_resource_len(pcidev,0));
|
|
err_region:
|
|
ac97_release_codec(codec);
|
|
kfree(s);
|
|
return -1;
|
|
}
|
|
|
|
static void __devexit vrc5477_ac97_remove(struct pci_dev *dev)
|
|
{
|
|
struct vrc5477_ac97_state *s = pci_get_drvdata(dev);
|
|
|
|
if (!s)
|
|
return;
|
|
list_del(&s->devs);
|
|
|
|
#ifdef VRC5477_AC97_DEBUG
|
|
if (s->ps)
|
|
remove_proc_entry(VRC5477_AC97_MODULE_NAME, NULL);
|
|
#endif /* VRC5477_AC97_DEBUG */
|
|
|
|
synchronize_irq();
|
|
free_irq(s->irq, s);
|
|
release_region(s->io, pci_resource_len(dev,0));
|
|
unregister_sound_dsp(s->dev_audio);
|
|
unregister_sound_mixer(s->codec->dev_mixer);
|
|
ac97_release_codec(s->codec);
|
|
kfree(s);
|
|
pci_set_drvdata(dev, NULL);
|
|
}
|
|
|
|
|
|
static struct pci_device_id id_table[] = {
|
|
{ PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_VRC5477_AC97,
|
|
PCI_ANY_ID, PCI_ANY_ID, 0, 0 },
|
|
{ 0, }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, id_table);
|
|
|
|
static struct pci_driver vrc5477_ac97_driver = {
|
|
.name = VRC5477_AC97_MODULE_NAME,
|
|
.id_table = id_table,
|
|
.probe = vrc5477_ac97_probe,
|
|
.remove = __devexit_p(vrc5477_ac97_remove)
|
|
};
|
|
|
|
static int __init init_vrc5477_ac97(void)
|
|
{
|
|
printk("Vrc5477 AC97 driver: version v0.2 time " __TIME__ " " __DATE__ " by Jun Sun\n");
|
|
return pci_module_init(&vrc5477_ac97_driver);
|
|
}
|
|
|
|
static void __exit cleanup_vrc5477_ac97(void)
|
|
{
|
|
printk(KERN_INFO PFX "unloading\n");
|
|
pci_unregister_driver(&vrc5477_ac97_driver);
|
|
}
|
|
|
|
module_init(init_vrc5477_ac97);
|
|
module_exit(cleanup_vrc5477_ac97);
|
|
|