cregit-Linux how code gets into the kernel

Release 4.8 sound/isa/msnd/msnd.c

Directory: sound/isa/msnd
/*********************************************************************
 *
 * 2002/06/30 Karsten Wiese:
 *      removed kernel-version dependencies.
 *      ripped from linux kernel 2.4.18 (OSS Implementation) by me.
 *      In the OSS Version, this file is compiled to a separate MODULE,
 *      that is used by the pinnacle and the classic driver.
 *      since there is no classic driver for alsa yet (i dont have a classic
 *      & writing one blindfold is difficult) this file's object is statically
 *      linked into the pinnacle-driver-module for now. look for the string
 *              "uncomment this to make this a module again"
 *      to do guess what.
 *
 * the following is a copy of the 2.4.18 OSS FREE file-heading comment:
 *
 * msnd.c - Driver Base
 *
 * Turtle Beach MultiSound Sound Card Driver for Linux
 *
 * Copyright (C) 1998 Andrew Veliath
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 ********************************************************************/

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/fs.h>
#include <linux/delay.h>
#include <linux/module.h>

#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>

#include "msnd.h"


#define LOGNAME			"msnd"



void snd_msnd_init_queue(void *base, int start, int size) { writew(PCTODSP_BASED(start), base + JQS_wStart); writew(PCTODSP_OFFSET(size) - 1, base + JQS_wSize); writew(0, base + JQS_wHead); writew(0, base + JQS_wTail); }

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EXPORT_SYMBOL(snd_msnd_init_queue);
static int snd_msnd_wait_TXDE(struct snd_msnd *dev) { unsigned int io = dev->io; int timeout = 1000; while (timeout-- > 0) if (inb(io + HP_ISR) & HPISR_TXDE) return 0; return -EIO; }

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static int snd_msnd_wait_HC0(struct snd_msnd *dev) { unsigned int io = dev->io; int timeout = 1000; while (timeout-- > 0) if (!(inb(io + HP_CVR) & HPCVR_HC)) return 0; return -EIO; }

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int snd_msnd_send_dsp_cmd(struct snd_msnd *dev, u8 cmd) { unsigned long flags; spin_lock_irqsave(&dev->lock, flags); if (snd_msnd_wait_HC0(dev) == 0) { outb(cmd, dev->io + HP_CVR); spin_unlock_irqrestore(&dev->lock, flags); return 0; } spin_unlock_irqrestore(&dev->lock, flags); snd_printd(KERN_ERR LOGNAME ": Send DSP command timeout\n"); return -EIO; }

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EXPORT_SYMBOL(snd_msnd_send_dsp_cmd);
int snd_msnd_send_word(struct snd_msnd *dev, unsigned char high, unsigned char mid, unsigned char low) { unsigned int io = dev->io; if (snd_msnd_wait_TXDE(dev) == 0) { outb(high, io + HP_TXH); outb(mid, io + HP_TXM); outb(low, io + HP_TXL); return 0; } snd_printd(KERN_ERR LOGNAME ": Send host word timeout\n"); return -EIO; }

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EXPORT_SYMBOL(snd_msnd_send_word);
int snd_msnd_upload_host(struct snd_msnd *dev, const u8 *bin, int len) { int i; if (len % 3 != 0) { snd_printk(KERN_ERR LOGNAME ": Upload host data not multiple of 3!\n"); return -EINVAL; } for (i = 0; i < len; i += 3) if (snd_msnd_send_word(dev, bin[i], bin[i + 1], bin[i + 2])) return -EIO; inb(dev->io + HP_RXL); inb(dev->io + HP_CVR); return 0; }

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EXPORT_SYMBOL(snd_msnd_upload_host);
int snd_msnd_enable_irq(struct snd_msnd *dev) { unsigned long flags; if (dev->irq_ref++) return 0; snd_printdd(LOGNAME ": Enabling IRQ\n"); spin_lock_irqsave(&dev->lock, flags); if (snd_msnd_wait_TXDE(dev) == 0) { outb(inb(dev->io + HP_ICR) | HPICR_TREQ, dev->io + HP_ICR); if (dev->type == msndClassic) outb(dev->irqid, dev->io + HP_IRQM); outb(inb(dev->io + HP_ICR) & ~HPICR_TREQ, dev->io + HP_ICR); outb(inb(dev->io + HP_ICR) | HPICR_RREQ, dev->io + HP_ICR); enable_irq(dev->irq); snd_msnd_init_queue(dev->DSPQ, dev->dspq_data_buff, dev->dspq_buff_size); spin_unlock_irqrestore(&dev->lock, flags); return 0; } spin_unlock_irqrestore(&dev->lock, flags); snd_printd(KERN_ERR LOGNAME ": Enable IRQ failed\n"); return -EIO; }

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EXPORT_SYMBOL(snd_msnd_enable_irq);
int snd_msnd_disable_irq(struct snd_msnd *dev) { unsigned long flags; if (--dev->irq_ref > 0) return 0; if (dev->irq_ref < 0) snd_printd(KERN_WARNING LOGNAME ": IRQ ref count is %d\n", dev->irq_ref); snd_printdd(LOGNAME ": Disabling IRQ\n"); spin_lock_irqsave(&dev->lock, flags); if (snd_msnd_wait_TXDE(dev) == 0) { outb(inb(dev->io + HP_ICR) & ~HPICR_RREQ, dev->io + HP_ICR); if (dev->type == msndClassic) outb(HPIRQ_NONE, dev->io + HP_IRQM); disable_irq(dev->irq); spin_unlock_irqrestore(&dev->lock, flags); return 0; } spin_unlock_irqrestore(&dev->lock, flags); snd_printd(KERN_ERR LOGNAME ": Disable IRQ failed\n"); return -EIO; }

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EXPORT_SYMBOL(snd_msnd_disable_irq);
static inline long get_play_delay_jiffies(struct snd_msnd *chip, long size) { long tmp = (size * HZ * chip->play_sample_size) / 8; return tmp / (chip->play_sample_rate * chip->play_channels); }

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static void snd_msnd_dsp_write_flush(struct snd_msnd *chip) { if (!(chip->mode & FMODE_WRITE) || !test_bit(F_WRITING, &chip->flags)) return; set_bit(F_WRITEFLUSH, &chip->flags); /* interruptible_sleep_on_timeout( &chip->writeflush, get_play_delay_jiffies(&chip, chip->DAPF.len));*/ clear_bit(F_WRITEFLUSH, &chip->flags); if (!signal_pending(current)) schedule_timeout_interruptible( get_play_delay_jiffies(chip, chip->play_period_bytes)); clear_bit(F_WRITING, &chip->flags); }

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void snd_msnd_dsp_halt(struct snd_msnd *chip, struct file *file) { if ((file ? file->f_mode : chip->mode) & FMODE_READ) { clear_bit(F_READING, &chip->flags); snd_msnd_send_dsp_cmd(chip, HDEX_RECORD_STOP); snd_msnd_disable_irq(chip); if (file) { snd_printd(KERN_INFO LOGNAME ": Stopping read for %p\n", file); chip->mode &= ~FMODE_READ; } clear_bit(F_AUDIO_READ_INUSE, &chip->flags); } if ((file ? file->f_mode : chip->mode) & FMODE_WRITE) { if (test_bit(F_WRITING, &chip->flags)) { snd_msnd_dsp_write_flush(chip); snd_msnd_send_dsp_cmd(chip, HDEX_PLAY_STOP); } snd_msnd_disable_irq(chip); if (file) { snd_printd(KERN_INFO LOGNAME ": Stopping write for %p\n", file); chip->mode &= ~FMODE_WRITE; } clear_bit(F_AUDIO_WRITE_INUSE, &chip->flags); } }

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EXPORT_SYMBOL(snd_msnd_dsp_halt);
int snd_msnd_DARQ(struct snd_msnd *chip, int bank) { int /*size, n,*/ timeout = 3; u16 wTmp; /* void *DAQD; */ /* Increment the tail and check for queue wrap */ wTmp = readw(chip->DARQ + JQS_wTail) + PCTODSP_OFFSET(DAQDS__size); if (wTmp > readw(chip->DARQ + JQS_wSize)) wTmp = 0; while (wTmp == readw(chip->DARQ + JQS_wHead) && timeout--) udelay(1); if (chip->capturePeriods == 2) { void *pDAQ = chip->mappedbase + DARQ_DATA_BUFF + bank * DAQDS__size + DAQDS_wStart; unsigned short offset = 0x3000 + chip->capturePeriodBytes; if (readw(pDAQ) != PCTODSP_BASED(0x3000)) offset = 0x3000; writew(PCTODSP_BASED(offset), pDAQ); } writew(wTmp, chip->DARQ + JQS_wTail); #if 0 /* Get our digital audio queue struct */ DAQD = bank * DAQDS__size + chip->mappedbase + DARQ_DATA_BUFF; /* Get length of data */ size = readw(DAQD + DAQDS_wSize); /* Read data from the head (unprotected bank 1 access okay since this is only called inside an interrupt) */ outb(HPBLKSEL_1, chip->io + HP_BLKS); n = msnd_fifo_write(&chip->DARF, (char *)(chip->base + bank * DAR_BUFF_SIZE), size, 0); if (n <= 0) { outb(HPBLKSEL_0, chip->io + HP_BLKS); return n; } outb(HPBLKSEL_0, chip->io + HP_BLKS); #endif return 1; }

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EXPORT_SYMBOL(snd_msnd_DARQ);
int snd_msnd_DAPQ(struct snd_msnd *chip, int start) { u16 DAPQ_tail; int protect = start, nbanks = 0; void *DAQD; static int play_banks_submitted; /* unsigned long flags; spin_lock_irqsave(&chip->lock, flags); not necessary */ DAPQ_tail = readw(chip->DAPQ + JQS_wTail); while (DAPQ_tail != readw(chip->DAPQ + JQS_wHead) || start) { int bank_num = DAPQ_tail / PCTODSP_OFFSET(DAQDS__size); if (start) { start = 0; play_banks_submitted = 0; } /* Get our digital audio queue struct */ DAQD = bank_num * DAQDS__size + chip->mappedbase + DAPQ_DATA_BUFF; /* Write size of this bank */ writew(chip->play_period_bytes, DAQD + DAQDS_wSize); if (play_banks_submitted < 3) ++play_banks_submitted; else if (chip->playPeriods == 2) { unsigned short offset = chip->play_period_bytes; if (readw(DAQD + DAQDS_wStart) != PCTODSP_BASED(0x0)) offset = 0; writew(PCTODSP_BASED(offset), DAQD + DAQDS_wStart); } ++nbanks; /* Then advance the tail */ /* if (protect) snd_printd(KERN_INFO "B %X %lX\n", bank_num, xtime.tv_usec); */ DAPQ_tail = (++bank_num % 3) * PCTODSP_OFFSET(DAQDS__size); writew(DAPQ_tail, chip->DAPQ + JQS_wTail); /* Tell the DSP to play the bank */ snd_msnd_send_dsp_cmd(chip, HDEX_PLAY_START); if (protect) if (2 == bank_num) break; } /* if (protect) snd_printd(KERN_INFO "%lX\n", xtime.tv_usec); */ /* spin_unlock_irqrestore(&chip->lock, flags); not necessary */ return nbanks; }

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EXPORT_SYMBOL(snd_msnd_DAPQ);
static void snd_msnd_play_reset_queue(struct snd_msnd *chip, unsigned int pcm_periods, unsigned int pcm_count) { int n; void *pDAQ = chip->mappedbase + DAPQ_DATA_BUFF; chip->last_playbank = -1; chip->playLimit = pcm_count * (pcm_periods - 1); chip->playPeriods = pcm_periods; writew(PCTODSP_OFFSET(0 * DAQDS__size), chip->DAPQ + JQS_wHead); writew(PCTODSP_OFFSET(0 * DAQDS__size), chip->DAPQ + JQS_wTail); chip->play_period_bytes = pcm_count; for (n = 0; n < pcm_periods; ++n, pDAQ += DAQDS__size) { writew(PCTODSP_BASED((u32)(pcm_count * n)), pDAQ + DAQDS_wStart); writew(0, pDAQ + DAQDS_wSize); writew(1, pDAQ + DAQDS_wFormat); writew(chip->play_sample_size, pDAQ + DAQDS_wSampleSize); writew(chip->play_channels, pDAQ + DAQDS_wChannels); writew(chip->play_sample_rate, pDAQ + DAQDS_wSampleRate); writew(HIMT_PLAY_DONE * 0x100 + n, pDAQ + DAQDS_wIntMsg); writew(n, pDAQ + DAQDS_wFlags); } }

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static void snd_msnd_capture_reset_queue(struct snd_msnd *chip, unsigned int pcm_periods, unsigned int pcm_count) { int n; void *pDAQ; /* unsigned long flags; */ /* snd_msnd_init_queue(chip->DARQ, DARQ_DATA_BUFF, DARQ_BUFF_SIZE); */ chip->last_recbank = 2; chip->captureLimit = pcm_count * (pcm_periods - 1); chip->capturePeriods = pcm_periods; writew(PCTODSP_OFFSET(0 * DAQDS__size), chip->DARQ + JQS_wHead); writew(PCTODSP_OFFSET(chip->last_recbank * DAQDS__size), chip->DARQ + JQS_wTail); #if 0 /* Critical section: bank 1 access. this is how the OSS driver does it:*/ spin_lock_irqsave(&chip->lock, flags); outb(HPBLKSEL_1, chip->io + HP_BLKS); memset_io(chip->mappedbase, 0, DAR_BUFF_SIZE * 3); outb(HPBLKSEL_0, chip->io + HP_BLKS); spin_unlock_irqrestore(&chip->lock, flags); #endif chip->capturePeriodBytes = pcm_count; snd_printdd("snd_msnd_capture_reset_queue() %i\n", pcm_count); pDAQ = chip->mappedbase + DARQ_DATA_BUFF; for (n = 0; n < pcm_periods; ++n, pDAQ += DAQDS__size) { u32 tmp = pcm_count * n; writew(PCTODSP_BASED(tmp + 0x3000), pDAQ + DAQDS_wStart); writew(pcm_count, pDAQ + DAQDS_wSize); writew(1, pDAQ + DAQDS_wFormat); writew(chip->capture_sample_size, pDAQ + DAQDS_wSampleSize); writew(chip->capture_channels, pDAQ + DAQDS_wChannels); writew(chip->capture_sample_rate, pDAQ + DAQDS_wSampleRate); writew(HIMT_RECORD_DONE * 0x100 + n, pDAQ + DAQDS_wIntMsg); writew(n, pDAQ + DAQDS_wFlags); } }

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static struct snd_pcm_hardware snd_msnd_playback = { .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH, .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE, .rates = SNDRV_PCM_RATE_8000_48000, .rate_min = 8000, .rate_max = 48000, .channels_min = 1, .channels_max = 2, .buffer_bytes_max = 0x3000, .period_bytes_min = 0x40, .period_bytes_max = 0x1800, .periods_min = 2, .periods_max = 3, .fifo_size = 0, }; static struct snd_pcm_hardware snd_msnd_capture = { .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH, .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE, .rates = SNDRV_PCM_RATE_8000_48000, .rate_min = 8000, .rate_max = 48000, .channels_min = 1, .channels_max = 2, .buffer_bytes_max = 0x3000, .period_bytes_min = 0x40, .period_bytes_max = 0x1800, .periods_min = 2, .periods_max = 3, .fifo_size = 0, };
static int snd_msnd_playback_open(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_msnd *chip = snd_pcm_substream_chip(substream); set_bit(F_AUDIO_WRITE_INUSE, &chip->flags); clear_bit(F_WRITING, &chip->flags); snd_msnd_enable_irq(chip); runtime->dma_area = chip->mappedbase; runtime->dma_bytes = 0x3000; chip->playback_substream = substream; runtime->hw = snd_msnd_playback; return 0; }

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static int snd_msnd_playback_close(struct snd_pcm_substream *substream) { struct snd_msnd *chip = snd_pcm_substream_chip(substream); snd_msnd_disable_irq(chip); clear_bit(F_AUDIO_WRITE_INUSE, &chip->flags); return 0; }

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static int snd_msnd_playback_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { int i; struct snd_msnd *chip = snd_pcm_substream_chip(substream); void *pDAQ = chip->mappedbase + DAPQ_DATA_BUFF; chip->play_sample_size = snd_pcm_format_width(params_format(params)); chip->play_channels = params_channels(params); chip->play_sample_rate = params_rate(params); for (i = 0; i < 3; ++i, pDAQ += DAQDS__size) { writew(chip->play_sample_size, pDAQ + DAQDS_wSampleSize); writew(chip->play_channels, pDAQ + DAQDS_wChannels); writew(chip->play_sample_rate, pDAQ + DAQDS_wSampleRate); } /* dont do this here: * snd_msnd_calibrate_adc(chip->play_sample_rate); */ return 0; }

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static int snd_msnd_playback_prepare(struct snd_pcm_substream *substream) { struct snd_msnd *chip = snd_pcm_substream_chip(substream); unsigned int pcm_size = snd_pcm_lib_buffer_bytes(substream); unsigned int pcm_count = snd_pcm_lib_period_bytes(substream); unsigned int pcm_periods = pcm_size / pcm_count; snd_msnd_play_reset_queue(chip, pcm_periods, pcm_count); chip->playDMAPos = 0; return 0; }

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static int snd_msnd_playback_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_msnd *chip = snd_pcm_substream_chip(substream); int result = 0; if (cmd == SNDRV_PCM_TRIGGER_START) { snd_printdd("snd_msnd_playback_trigger(START)\n"); chip->banksPlayed = 0; set_bit(F_WRITING, &chip->flags); snd_msnd_DAPQ(chip, 1); } else if (cmd == SNDRV_PCM_TRIGGER_STOP) { snd_printdd("snd_msnd_playback_trigger(STop)\n"); /* interrupt diagnostic, comment this out later */ clear_bit(F_WRITING, &chip->flags); snd_msnd_send_dsp_cmd(chip, HDEX_PLAY_STOP); } else { snd_printd(KERN_ERR "snd_msnd_playback_trigger(?????)\n"); result = -EINVAL; } snd_printdd("snd_msnd_playback_trigger() ENDE\n"); return result; }

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static snd_pcm_uframes_t snd_msnd_playback_pointer(struct snd_pcm_substream *substream) { struct snd_msnd *chip = snd_pcm_substream_chip(substream); return bytes_to_frames(substream->runtime, chip->playDMAPos); }

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static struct snd_pcm_ops snd_msnd_playback_ops = { .open = snd_msnd_playback_open, .close = snd_msnd_playback_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_msnd_playback_hw_params, .prepare = snd_msnd_playback_prepare, .trigger = snd_msnd_playback_trigger, .pointer = snd_msnd_playback_pointer, };
static int snd_msnd_capture_open(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_msnd *chip = snd_pcm_substream_chip(substream); set_bit(F_AUDIO_READ_INUSE, &chip->flags); snd_msnd_enable_irq(chip); runtime->dma_area = chip->mappedbase + 0x3000; runtime->dma_bytes = 0x3000; memset(runtime->dma_area, 0, runtime->dma_bytes); chip->capture_substream = substream; runtime->hw = snd_msnd_capture; return 0; }

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static int snd_msnd_capture_close(struct snd_pcm_substream *substream) { struct snd_msnd *chip = snd_pcm_substream_chip(substream); snd_msnd_disable_irq(chip); clear_bit(F_AUDIO_READ_INUSE, &chip->flags); return 0; }

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static int snd_msnd_capture_prepare(struct snd_pcm_substream *substream) { struct snd_msnd *chip = snd_pcm_substream_chip(substream); unsigned int pcm_size = snd_pcm_lib_buffer_bytes(substream); unsigned int pcm_count = snd_pcm_lib_period_bytes(substream); unsigned int pcm_periods = pcm_size / pcm_count; snd_msnd_capture_reset_queue(chip, pcm_periods, pcm_count); chip->captureDMAPos = 0; return 0; }

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static int snd_msnd_capture_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_msnd *chip = snd_pcm_substream_chip(substream); if (cmd == SNDRV_PCM_TRIGGER_START) { chip->last_recbank = -1; set_bit(F_READING, &chip->flags); if (snd_msnd_send_dsp_cmd(chip, HDEX_RECORD_START) == 0) return 0; clear_bit(F_READING, &chip->flags); } else if (cmd == SNDRV_PCM_TRIGGER_STOP) { clear_bit(F_READING, &chip->flags); snd_msnd_send_dsp_cmd(chip, HDEX_RECORD_STOP); return 0; } return -EINVAL; }

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static snd_pcm_uframes_t snd_msnd_capture_pointer(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_msnd *chip = snd_pcm_substream_chip(substream); return bytes_to_frames(runtime, chip->captureDMAPos); }

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static int snd_msnd_capture_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { int i; struct snd_msnd *chip = snd_pcm_substream_chip(substream); void *pDAQ = chip->mappedbase + DARQ_DATA_BUFF; chip->capture_sample_size = snd_pcm_format_width(params_format(params)); chip->capture_channels = params_channels(params); chip->capture_sample_rate = params_rate(params); for (i = 0; i < 3; ++i, pDAQ += DAQDS__size) { writew(chip->capture_sample_size, pDAQ + DAQDS_wSampleSize); writew(chip->capture_channels, pDAQ + DAQDS_wChannels); writew(chip->capture_sample_rate, pDAQ + DAQDS_wSampleRate); } return 0; }

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static struct snd_pcm_ops snd_msnd_capture_ops = { .open = snd_msnd_capture_open, .close = snd_msnd_capture_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_msnd_capture_hw_params, .prepare = snd_msnd_capture_prepare, .trigger = snd_msnd_capture_trigger, .pointer = snd_msnd_capture_pointer, };
int snd_msnd_pcm(struct snd_card *card, int device) { struct snd_msnd *chip = card->private_data; struct snd_pcm *pcm; int err; err = snd_pcm_new(card, "MSNDPINNACLE", device, 1, 1, &pcm); if (err < 0) return err; snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_msnd_playback_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_msnd_capture_ops); pcm->private_data = chip; strcpy(pcm->name, "Hurricane"); return 0; }

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EXPORT_SYMBOL(snd_msnd_pcm); MODULE_DESCRIPTION("Common routines for Turtle Beach Multisound drivers"); MODULE_LICENSE("GPL");

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takashi iwaitakashi iwai40.12%125.00%
paul gortmakerpaul gortmaker30.09%125.00%
Total3249100.00%4100.00%
Directory: sound/isa/msnd
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