diff options
Diffstat (limited to 'sys/i386/isa/sound/audio.c')
-rw-r--r-- | sys/i386/isa/sound/audio.c | 467 |
1 files changed, 467 insertions, 0 deletions
diff --git a/sys/i386/isa/sound/audio.c b/sys/i386/isa/sound/audio.c new file mode 100644 index 0000000..31f952e --- /dev/null +++ b/sys/i386/isa/sound/audio.c @@ -0,0 +1,467 @@ +/* + * sound/audio.c + * + * Device file manager for /dev/audio + * + * Copyright by Hannu Savolainen 1993 + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. 2. + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +#include <i386/isa/sound/sound_config.h> + +#ifdef CONFIG_AUDIO + +#include <i386/isa/sound/ulaw.h> +#include <i386/isa/sound/coproc.h> + +#define ON 1 +#define OFF 0 +int +DMAbuf_poll(int dev, struct fileinfo * file, int events, select_table * wait); + +int +audio_poll(int dev, struct fileinfo * file, int events, select_table * wait); + +static int wr_buff_no[MAX_AUDIO_DEV]; + /* != -1, if there is a incomplete output block in the queue. */ +static int wr_buff_size[MAX_AUDIO_DEV], wr_buff_ptr[MAX_AUDIO_DEV]; + +static int audio_mode[MAX_AUDIO_DEV]; +static int dev_nblock[MAX_AUDIO_DEV]; /* 1 if in noblocking mode */ + +#define AM_NONE 0 +#define AM_WRITE 1 +#define AM_READ 2 + +static char *wr_dma_buf[MAX_AUDIO_DEV]; +static int audio_format[MAX_AUDIO_DEV]; +static int local_conversion[MAX_AUDIO_DEV]; + +#if defined(NO_INLINE_ASM) || !defined(__i386__) +static void +translate_bytes(const u_char *table, u_char *buff, int n); + +#else +extern __inline void +translate_bytes(const void *table, void *buff, int n); +#endif + +static int +set_format(int dev, int fmt) +{ + if (fmt != AFMT_QUERY) { + + local_conversion[dev] = 0; + + if (!(audio_devs[dev]->format_mask & fmt)) /* Not supported */ + if (fmt == AFMT_MU_LAW) { + fmt = AFMT_U8; + local_conversion[dev] = AFMT_MU_LAW; + } else + fmt = AFMT_U8; /* This is always supported */ + + audio_format[dev] = DMAbuf_ioctl(dev, SNDCTL_DSP_SETFMT, + (ioctl_arg) fmt, 1); + } + if (local_conversion[dev]) /* This shadows the HW format */ + return local_conversion[dev]; + + return audio_format[dev]; +} + +int +audio_open(int dev, struct fileinfo * file) +{ + int ret; + int bits; + int dev_type = dev & 0x0f; + int mode = file->mode & O_ACCMODE; + + dev = dev >> 4; + + bits = (dev_type == SND_DEV_DSP16) ? 16 : 8 ; + + if ((ret = DMAbuf_open(dev, mode)) < 0) + return ret; + + if (audio_devs[dev]->coproc) + if ((ret = audio_devs[dev]->coproc-> + open(audio_devs[dev]->coproc->devc, COPR_PCM)) < 0) { + audio_release(dev, file); + printf("Sound: Can't access coprocessor device\n"); + + return ret; + } + local_conversion[dev] = 0; + + if (DMAbuf_ioctl(dev, SNDCTL_DSP_SETFMT, (ioctl_arg) bits, 1) != bits) { + audio_release(dev, file); + return -(ENXIO); + } + + set_format(dev, (dev_type == SND_DEV_AUDIO) ? AFMT_MU_LAW : bits ) ; + + wr_buff_no[dev] = -1; + audio_mode[dev] = AM_NONE; + wr_buff_size[dev] = wr_buff_ptr[dev] = 0; + dev_nblock[dev] = 0; + + return ret; +} + +void +audio_release(int dev, struct fileinfo * file) +{ + int mode; + + dev = dev >> 4; + mode = file->mode & O_ACCMODE; + + if (wr_buff_no[dev] >= 0) { + DMAbuf_start_output(dev, wr_buff_no[dev], wr_buff_ptr[dev]); + wr_buff_no[dev] = -1; + } + if (audio_devs[dev]->coproc) + audio_devs[dev]->coproc->close(audio_devs[dev]->coproc->devc,COPR_PCM); + DMAbuf_release(dev, mode); + audio_devs[dev]->dmap_out->mapping_flags &= ~DMA_MAP_MAPPED ; + +} + +#if defined(NO_INLINE_ASM) || !defined(__i386__) +static void +translate_bytes(const u_char *table, u_char *buff, int n) +{ + u_long i; + + if (n <= 0) + return; + + for (i = 0; i < n; ++i) + buff[i] = table[buff[i]]; +} + +#else +extern __inline void +translate_bytes(const void *table, void *buff, int n) +{ + if (n > 0) { + __asm__("cld\n" + "1:\tlodsb\n\t" + "xlatb\n\t" + "stosb\n\t" + "loop 1b\n\t": + :"b"(table), "c"(n), "D"(buff), "S"(buff) + :"bx", "cx", "di", "si", "ax"); + } +} + +#endif + +int +audio_write(int dev, struct fileinfo * file, snd_rw_buf * buf, int count) +{ + int c, p, l; + int err; + + dev = dev >> 4; + + p = 0; + c = count; + if ((audio_mode[dev] & AM_READ) && + !(audio_devs[dev]->flags & DMA_DUPLEX)) { /* Direction change */ + wr_buff_no[dev] = -1; + } + if (audio_devs[dev]->flags & DMA_DUPLEX) + audio_mode[dev] |= AM_WRITE; + else + audio_mode[dev] = AM_WRITE; + + if (!count) { /* Flush output */ + if (wr_buff_no[dev] >= 0) { + DMAbuf_start_output(dev, wr_buff_no[dev], wr_buff_ptr[dev]); + wr_buff_no[dev] = -1; + } + return 0; + } + while (c) { /* Perform output blocking */ + if (wr_buff_no[dev] < 0) { + /* There is no incomplete buffers */ + if ((wr_buff_no[dev] = DMAbuf_getwrbuffer(dev, + &wr_dma_buf[dev], &wr_buff_size[dev], + dev_nblock[dev])) < 0) { + /* Handle nonblocking mode */ + if (dev_nblock[dev] && wr_buff_no[dev] == -(EAGAIN)) + return p; /* No more space. Return # of accepted bytes */ + return wr_buff_no[dev]; + } + wr_buff_ptr[dev] = 0; + } + l = c; + if (l > (wr_buff_size[dev] - wr_buff_ptr[dev])) + l = (wr_buff_size[dev] - wr_buff_ptr[dev]); + + if (!audio_devs[dev]->copy_from_user) { /* No device specific + * copy routine */ + + if (uiomove(&wr_dma_buf[dev][wr_buff_ptr[dev]], l, buf)) { + printf("sb: Bad copyin()!\n"); + }; + } else + audio_devs[dev]->copy_from_user(dev, + wr_dma_buf[dev], wr_buff_ptr[dev], buf, p, l); + + + /* + * Insert local processing here + */ + + if (local_conversion[dev] == AFMT_MU_LAW) { + translate_bytes(ulaw_dsp, + (u_char *) &wr_dma_buf[dev][wr_buff_ptr[dev]], l); + } + c -= l; + p += l; + wr_buff_ptr[dev] += l; + + if (wr_buff_ptr[dev] >= wr_buff_size[dev]) { + if ((err = DMAbuf_start_output(dev, wr_buff_no[dev], + wr_buff_ptr[dev])) < 0) { + return err; + } + wr_buff_no[dev] = -1; + } + } + return count; +} + +int +audio_read(int dev, struct fileinfo * file, snd_rw_buf * buf, int count) +{ + int c, p, l; + char *dmabuf; + int buff_no; + + dev = dev >> 4; + p = 0; + c = count; + if ((audio_mode[dev] & AM_WRITE) && + !(audio_devs[dev]->flags & DMA_DUPLEX)) { + if (wr_buff_no[dev] >= 0) { + DMAbuf_start_output(dev, wr_buff_no[dev], wr_buff_ptr[dev]); + + if (!(audio_devs[dev]->flags & DMA_DUPLEX)) + wr_buff_no[dev] = -1; + } + } + if (audio_devs[dev]->flags & DMA_DUPLEX) + audio_mode[dev] |= AM_READ; + else + audio_mode[dev] = AM_READ; + + while (c) { + if ((buff_no = DMAbuf_getrdbuffer(dev, &dmabuf, &l, + dev_nblock[dev])) < 0) { + /* + * Nonblocking mode handling. Return current # of bytes + */ + + if (dev_nblock[dev] && buff_no == -(EAGAIN)) + return p; + + return buff_no; + } + if (l > c) + l = c; + + /* + * Insert any local processing here. + */ + + if (local_conversion[dev] == AFMT_MU_LAW) { + translate_bytes(dsp_ulaw, (u_char *) dmabuf, l); + } + if (uiomove(dmabuf, l, buf)) { + printf("sb: Bad copyout()!\n"); + }; + + DMAbuf_rmchars(dev, buff_no, l); + + p += l; + c -= l; + } + return count - c; +} + +int +audio_ioctl(int dev, struct fileinfo * file, u_int cmd, ioctl_arg arg) +{ + dev = dev >> 4; + if (((cmd >> 8) & 0xff) == 'C') { + if (audio_devs[dev]->coproc) /* Coprocessor ioctl */ + return audio_devs[dev]->coproc->ioctl(audio_devs[dev]->coproc->devc, cmd, arg, 0); + else + printf("/dev/dsp%d: No coprocessor for this device\n", dev); + + return -(ENXIO); + } else + switch (cmd) { + + case SNDCTL_DSP_SYNC: + if (wr_buff_no[dev] >= 0) { + DMAbuf_start_output(dev, wr_buff_no[dev], wr_buff_ptr[dev]); + wr_buff_no[dev] = -1; + } + return DMAbuf_ioctl(dev, cmd, arg, 0); + break; + + case SNDCTL_DSP_POST: + if (wr_buff_no[dev] >= 0) { + DMAbuf_start_output(dev, wr_buff_no[dev], wr_buff_ptr[dev]); + wr_buff_no[dev] = -1; + } + return 0; + break; + + case SNDCTL_DSP_RESET: + wr_buff_no[dev] = -1; + audio_mode[dev] = AM_NONE; + return DMAbuf_ioctl(dev, cmd, arg, 0); + break; + + case SNDCTL_DSP_GETFMTS: + return *(int *) arg = audio_devs[dev]->format_mask; + break; + + case SNDCTL_DSP_SETFMT: + return *(int *) arg = set_format(dev, (*(int *) arg)); + + case SNDCTL_DSP_GETISPACE: + if ((audio_mode[dev] & AM_WRITE) && + !(audio_devs[dev]->flags & DMA_DUPLEX)) + return -(EBUSY); + + else { + audio_buf_info info; + int err = DMAbuf_ioctl(dev, cmd, (ioctl_arg) & info, 1); + + if (err < 0) + return err; + + bcopy((char *) &info, &(((char *) arg)[0]), sizeof(info)); + return 0; + } + + case SNDCTL_DSP_GETOSPACE: + if ((audio_mode[dev] & AM_READ) && + !(audio_devs[dev]->flags & DMA_DUPLEX)) + return -(EBUSY); + else { + audio_buf_info info; + int err = DMAbuf_ioctl(dev, cmd, (ioctl_arg) & info, 1); + + if (err < 0) + return err; + + if (wr_buff_no[dev] != -1) + info.bytes += wr_buff_size[dev] - wr_buff_ptr[dev]; + + bcopy((char *) &info, &(((char *) arg)[0]), sizeof(info)); + return 0; + } + + case SNDCTL_DSP_NONBLOCK: + dev_nblock[dev] = 1; + return 0; + break; + + case SNDCTL_DSP_GETCAPS: + { + int info = 1; /* Revision level of this ioctl() */ + + if (audio_devs[dev]->flags & DMA_DUPLEX) + info |= DSP_CAP_DUPLEX; + + if (audio_devs[dev]->coproc) + info |= DSP_CAP_COPROC; + + if (audio_devs[dev]->local_qlen) /* Dev. has hidden buffs */ + info |= DSP_CAP_BATCH; + + if (audio_devs[dev]->trigger) /* Supports SETTRIGGER */ + info |= DSP_CAP_TRIGGER; + + info |= DSP_CAP_MMAP; + bcopy((char *) &info, &(((char *) arg)[0]), sizeof(info)); + return 0; + } + break; + + + case FIOASYNC: + return *(int *) arg = 1; + + case FIONBIO: + return *(int *) arg = 1; + + default: + return DMAbuf_ioctl(dev, cmd, arg, 0); + } +} + +#ifdef ALLOW_POLL +/* + * XXX should we use spltty() in the select calls ? - lr970714 + * + */ + +int +audio_poll(int dev, struct fileinfo * file, int events, select_table * wait) +{ + dev = dev >> 4; + + if (events & (POLLIN | POLLRDNORM)) { + if ((audio_mode[dev] & AM_WRITE) && + !(audio_devs[dev]->flags & DMA_DUPLEX)) + return 0; /* Not recording */ + + + return (DMAbuf_poll(dev, file, events, wait)); + } + + if (events & (POLLOUT | POLLWRNORM)) { + if ((audio_mode[dev] & AM_READ) && + !(audio_devs[dev]->flags & DMA_DUPLEX)) + return 0; /* Wrong direction */ + + if (wr_buff_no[dev] != -1) + return 1; /* There is space in the current buffer */ + + return ( DMAbuf_poll(dev, file, events, wait) ); + + } + return 0; +} +#endif /* ALLOW_POLL */ + +#endif |