733a4ea771
Reviewed by: cg MFC after: 1 week
588 lines
15 KiB
C
588 lines
15 KiB
C
/*
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* Copyright (c) 2000 David Jones <dej@ox.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <dev/sound/pcm/sound.h>
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#include <dev/sound/pcm/ac97.h>
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#include <pci/pcireg.h>
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#include <pci/pcivar.h>
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#include <sys/sysctl.h>
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#include <dev/sound/pci/via82c686.h>
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#define VIA_PCI_ID 0x30581106
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#define NSEGS 4 /* Number of segments in SGD table */
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#define SEGS_PER_CHAN (NSEGS/2)
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#define TIMEOUT 50
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#define VIA_BUFFSIZE 0x1000
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#undef DEB
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#define DEB(x)
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/* we rely on this struct being packed to 64 bits */
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struct via_dma_op {
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u_int32_t ptr;
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u_int32_t flags;
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#define VIA_DMAOP_EOL 0x80000000
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#define VIA_DMAOP_FLAG 0x40000000
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#define VIA_DMAOP_STOP 0x20000000
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#define VIA_DMAOP_COUNT(x) ((x)&0x00FFFFFF)
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};
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struct via_info;
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struct via_chinfo {
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struct via_info *parent;
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struct pcm_channel *channel;
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struct snd_dbuf *buffer;
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struct via_dma_op *sgd_table;
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int dir, blksz;
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int base, count, mode, ctrl;
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};
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struct via_info {
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bus_space_tag_t st;
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bus_space_handle_t sh;
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bus_dma_tag_t parent_dmat;
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bus_dma_tag_t sgd_dmat;
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bus_dmamap_t sgd_dmamap;
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struct resource *reg, *irq;
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int regid, irqid;
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void *ih;
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struct ac97_info *codec;
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struct via_chinfo pch, rch;
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struct via_dma_op *sgd_table;
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u_int16_t codec_caps;
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};
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static u_int32_t via_fmt[] = {
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AFMT_U8,
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AFMT_STEREO | AFMT_U8,
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AFMT_S16_LE,
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AFMT_STEREO | AFMT_S16_LE,
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0
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};
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static struct pcmchan_caps via_vracaps = {4000, 48000, via_fmt, 0};
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static struct pcmchan_caps via_caps = {48000, 48000, via_fmt, 0};
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static u_int32_t
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via_rd(struct via_info *via, int regno, int size)
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{
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switch (size) {
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case 1:
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return bus_space_read_1(via->st, via->sh, regno);
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case 2:
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return bus_space_read_2(via->st, via->sh, regno);
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case 4:
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return bus_space_read_4(via->st, via->sh, regno);
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default:
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return 0xFFFFFFFF;
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}
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}
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static void
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via_wr(struct via_info *via, int regno, u_int32_t data, int size)
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{
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switch (size) {
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case 1:
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bus_space_write_1(via->st, via->sh, regno, data);
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break;
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case 2:
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bus_space_write_2(via->st, via->sh, regno, data);
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break;
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case 4:
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bus_space_write_4(via->st, via->sh, regno, data);
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break;
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}
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}
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/* -------------------------------------------------------------------- */
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/* Codec interface */
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static int
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via_waitready_codec(struct via_info *via)
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{
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int i;
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/* poll until codec not busy */
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for (i = 0; (i < TIMEOUT) &&
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(via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_BUSY); i++)
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DELAY(1);
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if (i >= TIMEOUT) {
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printf("via: codec busy\n");
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return 1;
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}
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return 0;
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}
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static int
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via_waitvalid_codec(struct via_info *via)
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{
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int i;
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/* poll until codec valid */
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for (i = 0; (i < TIMEOUT) &&
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!(via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_PRIVALID); i++)
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DELAY(1);
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if (i >= TIMEOUT) {
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printf("via: codec invalid\n");
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return 1;
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}
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return 0;
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}
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static int
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via_write_codec(kobj_t obj, void *addr, int reg, u_int32_t val)
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{
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struct via_info *via = addr;
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if (via_waitready_codec(via)) return -1;
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via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_INDEX(reg) | val, 4);
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return 0;
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}
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static int
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via_read_codec(kobj_t obj, void *addr, int reg)
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{
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struct via_info *via = addr;
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if (via_waitready_codec(via))
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return -1;
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via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_READ | VIA_CODEC_INDEX(reg),4);
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if (via_waitready_codec(via))
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return -1;
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if (via_waitvalid_codec(via))
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return -1;
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return via_rd(via, VIA_CODEC_CTL, 2);
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}
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static kobj_method_t via_ac97_methods[] = {
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KOBJMETHOD(ac97_read, via_read_codec),
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KOBJMETHOD(ac97_write, via_write_codec),
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{ 0, 0 }
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};
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AC97_DECLARE(via_ac97);
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/* -------------------------------------------------------------------- */
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static int
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via_buildsgdt(struct via_chinfo *ch)
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{
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u_int32_t phys_addr, flag;
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int i, segs, seg_size;
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/*
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* Build the scatter/gather DMA (SGD) table.
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* There are four slots in the table: two for play, two for record.
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* This creates two half-buffers, one of which is playing; the other
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* is feeding.
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*/
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seg_size = ch->blksz;
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segs = sndbuf_getsize(ch->buffer) / seg_size;
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phys_addr = vtophys(sndbuf_getbuf(ch->buffer));
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for (i = 0; i < segs; i++) {
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flag = (i == segs - 1)? VIA_DMAOP_EOL : VIA_DMAOP_FLAG;
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ch->sgd_table[i].ptr = phys_addr + (i * seg_size);
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ch->sgd_table[i].flags = flag | seg_size;
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}
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return 0;
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}
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/* channel interface */
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static void *
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viachan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
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{
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struct via_info *via = devinfo;
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struct via_chinfo *ch = (dir == PCMDIR_PLAY)? &via->pch : &via->rch;
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ch->parent = via;
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ch->channel = c;
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ch->buffer = b;
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ch->dir = dir;
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ch->sgd_table = &via->sgd_table[(dir == PCMDIR_PLAY)? 0 : SEGS_PER_CHAN];
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if (ch->dir == PCMDIR_PLAY) {
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ch->base = VIA_PLAY_DMAOPS_BASE;
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ch->count = VIA_PLAY_DMAOPS_COUNT;
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ch->ctrl = VIA_RECORD_CONTROL;
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ch->mode = VIA_PLAY_MODE;
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} else {
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ch->base = VIA_RECORD_DMAOPS_BASE;
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ch->count = VIA_RECORD_DMAOPS_COUNT;
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ch->ctrl = VIA_PLAY_CONTROL;
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ch->mode = VIA_RECORD_MODE;
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}
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if (sndbuf_alloc(ch->buffer, via->parent_dmat, VIA_BUFFSIZE) == -1)
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return NULL;
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return ch;
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}
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static int
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viachan_setformat(kobj_t obj, void *data, u_int32_t format)
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{
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struct via_chinfo *ch = data;
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struct via_info *via = ch->parent;
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int mode, mode_set;
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mode_set = 0;
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if (format & AFMT_STEREO)
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mode_set |= VIA_RPMODE_STEREO;
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if (format & AFMT_S16_LE)
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mode_set |= VIA_RPMODE_16BIT;
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DEB(printf("set format: dir = %d, format=%x\n", ch->dir, format));
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mode = via_rd(via, ch->mode, 1);
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mode &= ~(VIA_RPMODE_16BIT | VIA_RPMODE_STEREO);
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mode |= mode_set;
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via_wr(via, ch->mode, mode, 1);
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return 0;
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}
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static int
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viachan_setspeed(kobj_t obj, void *data, u_int32_t speed)
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{
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struct via_chinfo *ch = data;
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struct via_info *via = ch->parent;
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int reg;
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/*
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* Basic AC'97 defines a 48 kHz sample rate only. For other rates,
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* upsampling is required.
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*
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* The VT82C686A does not perform upsampling, and neither do we.
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* If the codec supports variable-rate audio (i.e. does the upsampling
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* itself), then negotiate the rate with the codec. Otherwise,
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* return 48 kHz cuz that's all you got.
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*/
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if (via->codec_caps & AC97_EXTCAP_VRA) {
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reg = (ch->dir == PCMDIR_PLAY)? AC97_REGEXT_FDACRATE : AC97_REGEXT_LADCRATE;
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return ac97_setrate(via->codec, reg, speed);
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} else
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return 48000;
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}
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static int
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viachan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
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{
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struct via_chinfo *ch = data;
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ch->blksz = blocksize;
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sndbuf_resize(ch->buffer, SEGS_PER_CHAN, ch->blksz);
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return ch->blksz;
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}
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static int
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viachan_trigger(kobj_t obj, void *data, int go)
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{
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struct via_chinfo *ch = data;
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struct via_info *via = ch->parent;
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struct via_dma_op *ado;
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if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
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return 0;
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ado = ch->sgd_table;
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DEB(printf("ado located at va=%p pa=%x\n", ado, vtophys(ado)));
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if (go == PCMTRIG_START) {
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via_buildsgdt(ch);
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via_wr(via, ch->base, vtophys(ado), 4);
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via_wr(via, ch->ctrl, VIA_RPCTRL_START, 1);
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} else
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via_wr(via, ch->ctrl, VIA_RPCTRL_TERMINATE, 1);
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DEB(printf("viachan_trigger: go=%d\n", go));
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return 0;
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}
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static int
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viachan_getptr(kobj_t obj, void *data)
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{
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struct via_chinfo *ch = data;
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struct via_info *via = ch->parent;
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struct via_dma_op *ado;
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int ptr, base, base1, len, seg;
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ado = ch->sgd_table;
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base1 = via_rd(via, ch->base, 4);
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len = via_rd(via, ch->count, 4);
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base = via_rd(via, ch->base, 4);
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if (base != base1) /* Avoid race hazard */
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len = via_rd(via, ch->count, 4);
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DEB(printf("viachan_getptr: len / base = %x / %x\n", len, base));
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/* Base points to SGD segment to do, one past current */
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/* Determine how many segments have been done */
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seg = (base - vtophys(ado)) / sizeof(struct via_dma_op);
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if (seg == 0)
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seg = SEGS_PER_CHAN;
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/* Now work out offset: seg less count */
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ptr = (seg * sndbuf_getsize(ch->buffer) / SEGS_PER_CHAN) - len;
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if (ch->dir == PCMDIR_REC) {
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/* DMA appears to operate on memory 'lines' of 32 bytes */
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/* so don't return any part line - it isn't in RAM yet */
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ptr = ptr & ~0x1f;
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}
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DEB(printf("return ptr=%d\n", ptr));
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return ptr;
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}
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static struct pcmchan_caps *
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viachan_getcaps(kobj_t obj, void *data)
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{
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struct via_chinfo *ch = data;
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struct via_info *via = ch->parent;
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return (via->codec_caps & AC97_EXTCAP_VRA)? &via_vracaps : &via_caps;
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}
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static kobj_method_t viachan_methods[] = {
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KOBJMETHOD(channel_init, viachan_init),
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KOBJMETHOD(channel_setformat, viachan_setformat),
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KOBJMETHOD(channel_setspeed, viachan_setspeed),
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KOBJMETHOD(channel_setblocksize, viachan_setblocksize),
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KOBJMETHOD(channel_trigger, viachan_trigger),
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KOBJMETHOD(channel_getptr, viachan_getptr),
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KOBJMETHOD(channel_getcaps, viachan_getcaps),
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{ 0, 0 }
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};
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CHANNEL_DECLARE(viachan);
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/* -------------------------------------------------------------------- */
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static void
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via_intr(void *p)
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{
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struct via_info *via = p;
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int st;
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/* DEB(printf("viachan_intr\n")); */
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/* Read channel */
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st = via_rd(via, VIA_PLAY_STAT, 1);
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if (st & VIA_RPSTAT_INTR) {
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via_wr(via, VIA_PLAY_STAT, VIA_RPSTAT_INTR, 1);
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chn_intr(via->pch.channel);
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}
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/* Write channel */
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st = via_rd(via, VIA_RECORD_STAT, 1);
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if (st & VIA_RPSTAT_INTR) {
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via_wr(via, VIA_RECORD_STAT, VIA_RPSTAT_INTR, 1);
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chn_intr(via->rch.channel);
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}
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}
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/*
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* Probe and attach the card
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*/
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static int
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via_probe(device_t dev)
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{
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if (pci_get_devid(dev) == VIA_PCI_ID) {
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device_set_desc(dev, "VIA VT82C686A");
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return 0;
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}
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return ENXIO;
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}
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static void
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dma_cb(void *p, bus_dma_segment_t *bds, int a, int b)
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{
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}
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static int
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via_attach(device_t dev)
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{
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struct via_info *via = 0;
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char status[SND_STATUSLEN];
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u_int32_t data;
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if ((via = malloc(sizeof *via, M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) {
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device_printf(dev, "cannot allocate softc\n");
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return ENXIO;
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}
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/* Get resources */
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data = pci_read_config(dev, PCIR_COMMAND, 2);
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data |= (PCIM_CMD_PORTEN | PCIM_CMD_BUSMASTEREN);
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pci_write_config(dev, PCIR_COMMAND, data, 2);
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data = pci_read_config(dev, PCIR_COMMAND, 2);
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pci_write_config(dev, VIA_PCICONF_MISC,
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VIA_PCICONF_ACLINKENAB | VIA_PCICONF_ACSGD | VIA_PCICONF_ACNOTRST | VIA_PCICONF_ACVSR, 1);
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via->regid = PCIR_MAPS;
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via->reg = bus_alloc_resource(dev, SYS_RES_IOPORT, &via->regid, 0, ~0, 1, RF_ACTIVE);
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if (!via->reg) {
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device_printf(dev, "cannot allocate bus resource.");
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goto bad;
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}
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via->st = rman_get_bustag(via->reg);
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via->sh = rman_get_bushandle(via->reg);
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via->irqid = 0;
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via->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &via->irqid, 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
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if (!via->irq || snd_setup_intr(dev, via->irq, 0, via_intr, via, &via->ih)) {
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device_printf(dev, "unable to map interrupt\n");
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goto bad;
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}
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via_wr(via, VIA_PLAY_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1);
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via_wr(via, VIA_RECORD_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1);
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via->codec = AC97_CREATE(dev, via, via_ac97);
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if (!via->codec)
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goto bad;
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mixer_init(dev, ac97_getmixerclass(), via->codec);
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via->codec_caps = ac97_getextcaps(via->codec);
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if (via->codec_caps & AC97_EXTCAP_VRA)
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ac97_setextmode(via->codec, AC97_EXTCAP_VRA | AC97_EXTCAP_VRM);
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/* DMA tag for buffers */
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if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0,
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/*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
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/*highaddr*/BUS_SPACE_MAXADDR,
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/*filter*/NULL, /*filterarg*/NULL,
|
|
/*maxsize*/VIA_BUFFSIZE, /*nsegments*/1, /*maxsegz*/0x3ffff,
|
|
/*flags*/0, &via->parent_dmat) != 0) {
|
|
device_printf(dev, "unable to create dma tag\n");
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* DMA tag for SGD table. The 686 uses scatter/gather DMA and
|
|
* requires a list in memory of work to do. We need only 16 bytes
|
|
* for this list, and it is wasteful to allocate 16K.
|
|
*/
|
|
if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0,
|
|
/*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
|
|
/*highaddr*/BUS_SPACE_MAXADDR,
|
|
/*filter*/NULL, /*filterarg*/NULL,
|
|
/*maxsize*/NSEGS * sizeof(struct via_dma_op),
|
|
/*nsegments*/1, /*maxsegz*/0x3ffff,
|
|
/*flags*/0, &via->sgd_dmat) != 0) {
|
|
device_printf(dev, "unable to create dma tag\n");
|
|
goto bad;
|
|
}
|
|
|
|
if (bus_dmamem_alloc(via->sgd_dmat, (void **)&via->sgd_table, BUS_DMA_NOWAIT, &via->sgd_dmamap) == -1)
|
|
goto bad;
|
|
if (bus_dmamap_load(via->sgd_dmat, via->sgd_dmamap, via->sgd_table, NSEGS * sizeof(struct via_dma_op), dma_cb, 0, 0))
|
|
goto bad;
|
|
|
|
snprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld", rman_get_start(via->reg), rman_get_start(via->irq));
|
|
|
|
/* Register */
|
|
if (pcm_register(dev, via, 1, 1)) goto bad;
|
|
pcm_addchan(dev, PCMDIR_PLAY, &viachan_class, via);
|
|
pcm_addchan(dev, PCMDIR_REC, &viachan_class, via);
|
|
pcm_setstatus(dev, status);
|
|
return 0;
|
|
bad:
|
|
if (via->codec) ac97_destroy(via->codec);
|
|
if (via->reg) bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg);
|
|
if (via->ih) bus_teardown_intr(dev, via->irq, via->ih);
|
|
if (via->irq) bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq);
|
|
if (via->parent_dmat) bus_dma_tag_destroy(via->parent_dmat);
|
|
if (via->sgd_dmamap) bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap);
|
|
if (via->sgd_dmat) bus_dma_tag_destroy(via->sgd_dmat);
|
|
if (via) free(via, M_DEVBUF);
|
|
return ENXIO;
|
|
}
|
|
|
|
static int
|
|
via_detach(device_t dev)
|
|
{
|
|
int r;
|
|
struct via_info *via = 0;
|
|
|
|
r = pcm_unregister(dev);
|
|
if (r)
|
|
return r;
|
|
|
|
via = pcm_getdevinfo(dev);
|
|
bus_release_resource(dev, SYS_RES_IOPORT, via->regid, via->reg);
|
|
bus_teardown_intr(dev, via->irq, via->ih);
|
|
bus_release_resource(dev, SYS_RES_IRQ, via->irqid, via->irq);
|
|
bus_dma_tag_destroy(via->parent_dmat);
|
|
bus_dmamap_unload(via->sgd_dmat, via->sgd_dmamap);
|
|
bus_dma_tag_destroy(via->sgd_dmat);
|
|
free(via, M_DEVBUF);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static device_method_t via_methods[] = {
|
|
DEVMETHOD(device_probe, via_probe),
|
|
DEVMETHOD(device_attach, via_attach),
|
|
DEVMETHOD(device_detach, via_detach),
|
|
{ 0, 0}
|
|
};
|
|
|
|
static driver_t via_driver = {
|
|
"pcm",
|
|
via_methods,
|
|
sizeof(struct snddev_info),
|
|
};
|
|
|
|
DRIVER_MODULE(via, pci, via_driver, pcm_devclass, 0, 0);
|
|
MODULE_DEPEND(via, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
|
|
MODULE_VERSION(via, 1);
|
|
|
|
|