HelenOS sources

root/uspace/drv/audio/hdaudio/stream.c

DEFINITIONS

1. hda_stream_buffers_alloc
2. hda_stream_buffers_free
3. hda_stream_desc_configure
4. hda_stream_set_run
5. hda_stream_reset_noinit
6. hda_stream_create
7. hda_stream_destroy
8. hda_stream_start
9. hda_stream_stop
10. hda_stream_reset

/*
 * Copyright (c) 2022 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */

/** @addtogroup hdaudio
 * @{
 */
/** @file High Definition Audio stream
 */

#include <as.h>
#include <bitops.h>
#include <byteorder.h>
#include <ddf/log.h>
#include <ddi.h>
#include <errno.h>
#include <str_error.h>
#include <macros.h>
#include <stdlib.h>

#include "hdactl.h"
#include "hdaudio.h"
#include "regif.h"
#include "spec/bdl.h"
#include "stream.h"

errno_t hda_stream_buffers_alloc(hda_t *hda, hda_stream_buffers_t **rbufs)
{
        void *bdl;
        void *buffer;
        uintptr_t buffer_phys;
        hda_stream_buffers_t *bufs = NULL;
        size_t i;
        //size_t j, k;
        errno_t rc;

        bufs = calloc(1, sizeof(hda_stream_buffers_t));
        if (bufs == NULL) {
                rc = ENOMEM;
                goto error;
        }

        bufs->nbuffers = 4;
        bufs->bufsize = 16384;

        /*
         * BDL must be aligned to 128 bytes. If 64OK is not set,
         * it must be within the 32-bit address space.
         */
        bdl = AS_AREA_ANY;
        rc = dmamem_map_anonymous(bufs->nbuffers * sizeof(hda_buffer_desc_t),
            hda->ctl->ok64bit ? 0 : DMAMEM_4GiB, AS_AREA_READ | AS_AREA_WRITE,
            0, &bufs->bdl_phys, &bdl);
        if (rc != EOK)
                goto error;

        bufs->bdl = bdl;

        /* Allocate arrays of buffer pointers */

        bufs->buf = calloc(bufs->nbuffers, sizeof(void *));
        if (bufs->buf == NULL)
                goto error;

        bufs->buf_phys = calloc(bufs->nbuffers, sizeof(uintptr_t));
        if (bufs->buf_phys == NULL)
                goto error;

        /* Allocate buffers */
#if 0
        for (i = 0; i < bufs->nbuffers; i++) {
                buffer = AS_AREA_ANY;
                rc = dmamem_map_anonymous(bufs->bufsize,
                    bufs->hda->ctl->ok64bit ? 0 : DMAMEM_4GiB, AS_AREA_READ | AS_AREA_WRITE,
                    0, &buffer_phys, &buffer);
                if (rc != EOK)
                        goto error;

                ddf_msg(LVL_DEBUG, "Stream buf phys=0x%llx virt=%p",
                    (unsigned long long)buffer_phys, buffer);

                bufs->buf[i] = buffer;
                bufs->buf_phys[i] = buffer_phys;

                k = 0;
                for (j = 0; j < bufs->bufsize / 2; j++) {
                        int16_t *bp = bufs->buf[i];
                        bp[j] = (k > 128) ? -100 : 100;
                        ++k;
                        if (k >= 256)
                                k = 0;
                }
        }
#endif
        /* audio_pcm_iface requires a single contiguous buffer */
        buffer = AS_AREA_ANY;
        rc = dmamem_map_anonymous(bufs->bufsize * bufs->nbuffers,
            hda->ctl->ok64bit ? 0 : DMAMEM_4GiB, AS_AREA_READ | AS_AREA_WRITE,
            0, &buffer_phys, &buffer);
        if (rc != EOK) {
                ddf_msg(LVL_DEBUG, "dmamem_map_anon -> %s", str_error_name(rc));
                goto error;
        }

        for (i = 0; i < bufs->nbuffers; i++) {
                bufs->buf[i] = buffer + i * bufs->bufsize;
                bufs->buf_phys[i] = buffer_phys + i * bufs->bufsize;

                ddf_msg(LVL_DEBUG, "Stream buf phys=0x%llx virt=%p",
                    (long long unsigned)(uintptr_t)bufs->buf[i],
                    (void *)bufs->buf_phys[i]);
        }

        /* Fill in BDL */
        for (i = 0; i < bufs->nbuffers; i++) {
                bufs->bdl[i].address = host2uint64_t_le(bufs->buf_phys[i]);
                bufs->bdl[i].length = host2uint32_t_le(bufs->bufsize);
                bufs->bdl[i].flags = BIT_V(uint32_t, bdf_ioc);
        }

        *rbufs = bufs;
        return EOK;
error:
        hda_stream_buffers_free(bufs);
        return ENOMEM;
}

void hda_stream_buffers_free(hda_stream_buffers_t *bufs)
{
        if (bufs == NULL)
                return;

        /* XXX */
        free(bufs);
}

static void hda_stream_desc_configure(hda_stream_t *stream)
{
        hda_sdesc_regs_t *sdregs;
        hda_stream_buffers_t *bufs = stream->buffers;
        uint8_t ctl1;
        uint8_t ctl3;

        /* Stream ID */
        ctl3 = (stream->sid << 4);

        /* Interrupt on buffer completion */
        ctl1 = BIT_V(uint8_t, sdctl1_ioce);

        sdregs = &stream->hda->regs->sdesc[stream->sdid];
        hda_reg8_write(&sdregs->ctl3, ctl3);
        hda_reg8_write(&sdregs->ctl1, ctl1);
        hda_reg32_write(&sdregs->cbl, bufs->nbuffers * bufs->bufsize);
        hda_reg16_write(&sdregs->lvi, bufs->nbuffers - 1);
        hda_reg16_write(&sdregs->fmt, stream->fmt);
        hda_reg32_write(&sdregs->bdpl, LOWER32(bufs->bdl_phys));
        hda_reg32_write(&sdregs->bdpu, UPPER32(bufs->bdl_phys));
}

static void hda_stream_set_run(hda_stream_t *stream, bool run)
{
        uint32_t ctl;
        hda_sdesc_regs_t *sdregs;

        sdregs = &stream->hda->regs->sdesc[stream->sdid];

        ctl = hda_reg8_read(&sdregs->ctl1);
        if (run)
                ctl = ctl | BIT_V(uint8_t, sdctl1_run);
        else
                ctl = ctl & ~BIT_V(uint8_t, sdctl1_run);

        hda_reg8_write(&sdregs->ctl1, ctl);
}

static void hda_stream_reset_noinit(hda_stream_t *stream)
{
        uint32_t ctl;
        hda_sdesc_regs_t *sdregs;

        sdregs = &stream->hda->regs->sdesc[stream->sdid];

        ctl = hda_reg8_read(&sdregs->ctl1);
        ctl = ctl | BIT_V(uint8_t, sdctl1_srst);
        hda_reg8_write(&sdregs->ctl1, ctl);

        fibril_usleep(100 * 1000);

        ctl = hda_reg8_read(&sdregs->ctl1);
        ctl = ctl & ~BIT_V(uint8_t, sdctl1_srst);
        hda_reg8_write(&sdregs->ctl1, ctl);

        fibril_usleep(100 * 1000);
}

hda_stream_t *hda_stream_create(hda_t *hda, hda_stream_dir_t dir,
    hda_stream_buffers_t *bufs, uint32_t fmt)
{
        hda_stream_t *stream;
        uint8_t sdid;

        stream = calloc(1, sizeof(hda_stream_t));
        if (stream == NULL)
                return NULL;

        sdid = 0;

        switch (dir) {
        case sdir_input:
                sdid = 0; /* XXX Allocate - first input SDESC */
                break;
        case sdir_output:
                sdid = hda->ctl->iss; /* XXX Allocate - First output SDESC */
                break;
        case sdir_bidi:
                sdid = hda->ctl->iss + hda->ctl->oss; /* XXX Allocate - First bidi SDESC */
                break;
        }

        stream->hda = hda;
        stream->dir = dir;
        stream->sid = 1; /* XXX Allocate this */
        stream->sdid = sdid;
        stream->fmt = fmt;
        stream->buffers = bufs;

        ddf_msg(LVL_DEBUG, "snum=%d sdidx=%d", stream->sid, stream->sdid);

        ddf_msg(LVL_DEBUG, "Configure stream descriptor");
        hda_stream_desc_configure(stream);
        return stream;
}

void hda_stream_destroy(hda_stream_t *stream)
{
        ddf_msg(LVL_DEBUG, "hda_stream_destroy()");
        hda_stream_reset_noinit(stream);
        free(stream);
}

void hda_stream_start(hda_stream_t *stream)
{
        ddf_msg(LVL_DEBUG, "hda_stream_start()");
        hda_stream_set_run(stream, true);
}

void hda_stream_stop(hda_stream_t *stream)
{
        ddf_msg(LVL_DEBUG, "hda_stream_stop()");
        hda_stream_set_run(stream, false);
}

void hda_stream_reset(hda_stream_t *stream)
{
        ddf_msg(LVL_DEBUG, "hda_stream_reset()");
        hda_stream_reset_noinit(stream);
        hda_stream_desc_configure(stream);
}

/** @}
 */