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Diffstat (limited to 'sys/dev/sound/pci/via82c686.c')
-rw-r--r--sys/dev/sound/pci/via82c686.c589
1 files changed, 589 insertions, 0 deletions
diff --git a/sys/dev/sound/pci/via82c686.c b/sys/dev/sound/pci/via82c686.c
new file mode 100644
index 0000000..5bd8c47
--- /dev/null
+++ b/sys/dev/sound/pci/via82c686.c
@@ -0,0 +1,589 @@
+/*
+ * Copyright (c) 2000 David Jones <dej@ox.org>
+ * All rights reserved.
+ *
+ * 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 <dev/sound/pcm/sound.h>
+#include <dev/sound/pcm/ac97.h>
+
+#include <pci/pcireg.h>
+#include <pci/pcivar.h>
+#include <sys/sysctl.h>
+
+#include <dev/sound/pci/via82c686.h>
+
+SND_DECLARE_FILE("$FreeBSD$");
+
+#define VIA_PCI_ID 0x30581106
+#define NSEGS 4 /* Number of segments in SGD table */
+
+#define SEGS_PER_CHAN (NSEGS/2)
+
+#define TIMEOUT 50
+#define VIA_DEFAULT_BUFSZ 0x1000
+
+#undef DEB
+#define DEB(x)
+
+/* we rely on this struct being packed to 64 bits */
+struct via_dma_op {
+ u_int32_t ptr;
+ u_int32_t flags;
+#define VIA_DMAOP_EOL 0x80000000
+#define VIA_DMAOP_FLAG 0x40000000
+#define VIA_DMAOP_STOP 0x20000000
+#define VIA_DMAOP_COUNT(x) ((x)&0x00FFFFFF)
+};
+
+struct via_info;
+
+struct via_chinfo {
+ struct via_info *parent;
+ struct pcm_channel *channel;
+ struct snd_dbuf *buffer;
+ struct via_dma_op *sgd_table;
+ int dir, blksz;
+ int base, count, mode, ctrl;
+};
+
+struct via_info {
+ bus_space_tag_t st;
+ bus_space_handle_t sh;
+ bus_dma_tag_t parent_dmat;
+ bus_dma_tag_t sgd_dmat;
+ bus_dmamap_t sgd_dmamap;
+
+ struct resource *reg, *irq;
+ int regid, irqid;
+ void *ih;
+ struct ac97_info *codec;
+
+ unsigned int bufsz;
+
+ struct via_chinfo pch, rch;
+ struct via_dma_op *sgd_table;
+ u_int16_t codec_caps;
+};
+
+static u_int32_t via_fmt[] = {
+ AFMT_U8,
+ AFMT_STEREO | AFMT_U8,
+ AFMT_S16_LE,
+ AFMT_STEREO | AFMT_S16_LE,
+ 0
+};
+static struct pcmchan_caps via_vracaps = {4000, 48000, via_fmt, 0};
+static struct pcmchan_caps via_caps = {48000, 48000, via_fmt, 0};
+
+static u_int32_t
+via_rd(struct via_info *via, int regno, int size)
+{
+
+ switch (size) {
+ case 1:
+ return bus_space_read_1(via->st, via->sh, regno);
+ case 2:
+ return bus_space_read_2(via->st, via->sh, regno);
+ case 4:
+ return bus_space_read_4(via->st, via->sh, regno);
+ default:
+ return 0xFFFFFFFF;
+ }
+}
+
+
+static void
+via_wr(struct via_info *via, int regno, u_int32_t data, int size)
+{
+
+ switch (size) {
+ case 1:
+ bus_space_write_1(via->st, via->sh, regno, data);
+ break;
+ case 2:
+ bus_space_write_2(via->st, via->sh, regno, data);
+ break;
+ case 4:
+ bus_space_write_4(via->st, via->sh, regno, data);
+ break;
+ }
+}
+
+/* -------------------------------------------------------------------- */
+/* Codec interface */
+
+static int
+via_waitready_codec(struct via_info *via)
+{
+ int i;
+
+ /* poll until codec not busy */
+ for (i = 0; (i < TIMEOUT) &&
+ (via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_BUSY); i++)
+ DELAY(1);
+ if (i >= TIMEOUT) {
+ printf("via: codec busy\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+
+static int
+via_waitvalid_codec(struct via_info *via)
+{
+ int i;
+
+ /* poll until codec valid */
+ for (i = 0; (i < TIMEOUT) &&
+ !(via_rd(via, VIA_CODEC_CTL, 4) & VIA_CODEC_PRIVALID); i++)
+ DELAY(1);
+ if (i >= TIMEOUT) {
+ printf("via: codec invalid\n");
+ return 1;
+ }
+
+ return 0;
+}
+
+
+static int
+via_write_codec(kobj_t obj, void *addr, int reg, u_int32_t val)
+{
+ struct via_info *via = addr;
+
+ if (via_waitready_codec(via)) return -1;
+
+ via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_INDEX(reg) | val, 4);
+
+ return 0;
+}
+
+
+static int
+via_read_codec(kobj_t obj, void *addr, int reg)
+{
+ struct via_info *via = addr;
+
+ if (via_waitready_codec(via))
+ return -1;
+
+ via_wr(via, VIA_CODEC_CTL, VIA_CODEC_PRIVALID | VIA_CODEC_READ | VIA_CODEC_INDEX(reg),4);
+
+ if (via_waitready_codec(via))
+ return -1;
+
+ if (via_waitvalid_codec(via))
+ return -1;
+
+ return via_rd(via, VIA_CODEC_CTL, 2);
+}
+
+static kobj_method_t via_ac97_methods[] = {
+ KOBJMETHOD(ac97_read, via_read_codec),
+ KOBJMETHOD(ac97_write, via_write_codec),
+ { 0, 0 }
+};
+AC97_DECLARE(via_ac97);
+
+/* -------------------------------------------------------------------- */
+
+static int
+via_buildsgdt(struct via_chinfo *ch)
+{
+ u_int32_t phys_addr, flag;
+ int i, segs, seg_size;
+
+ /*
+ * Build the scatter/gather DMA (SGD) table.
+ * There are four slots in the table: two for play, two for record.
+ * This creates two half-buffers, one of which is playing; the other
+ * is feeding.
+ */
+ seg_size = ch->blksz;
+ segs = sndbuf_getsize(ch->buffer) / seg_size;
+ phys_addr = vtophys(sndbuf_getbuf(ch->buffer));
+
+ for (i = 0; i < segs; i++) {
+ flag = (i == segs - 1)? VIA_DMAOP_EOL : VIA_DMAOP_FLAG;
+ ch->sgd_table[i].ptr = phys_addr + (i * seg_size);
+ ch->sgd_table[i].flags = flag | seg_size;
+ }
+
+ return 0;
+}
+
+/* channel interface */
+static void *
+viachan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
+{
+ struct via_info *via = devinfo;
+ struct via_chinfo *ch = (dir == PCMDIR_PLAY)? &via->pch : &via->rch;
+
+ ch->parent = via;
+ ch->channel = c;
+ ch->buffer = b;
+ ch->dir = dir;
+ ch->sgd_table = &via->sgd_table[(dir == PCMDIR_PLAY)? 0 : SEGS_PER_CHAN];
+ if (ch->dir == PCMDIR_PLAY) {
+ ch->base = VIA_PLAY_DMAOPS_BASE;
+ ch->count = VIA_PLAY_DMAOPS_COUNT;
+ ch->ctrl = VIA_PLAY_CONTROL;
+ ch->mode = VIA_PLAY_MODE;
+ } else {
+ ch->base = VIA_RECORD_DMAOPS_BASE;
+ ch->count = VIA_RECORD_DMAOPS_COUNT;
+ ch->ctrl = VIA_RECORD_CONTROL;
+ ch->mode = VIA_RECORD_MODE;
+ }
+
+ if (sndbuf_alloc(ch->buffer, via->parent_dmat, via->bufsz) == -1)
+ return NULL;
+ return ch;
+}
+
+static int
+viachan_setformat(kobj_t obj, void *data, u_int32_t format)
+{
+ struct via_chinfo *ch = data;
+ struct via_info *via = ch->parent;
+ int mode, mode_set;
+
+ mode_set = 0;
+ if (format & AFMT_STEREO)
+ mode_set |= VIA_RPMODE_STEREO;
+ if (format & AFMT_S16_LE)
+ mode_set |= VIA_RPMODE_16BIT;
+
+ DEB(printf("set format: dir = %d, format=%x\n", ch->dir, format));
+ mode = via_rd(via, ch->mode, 1);
+ mode &= ~(VIA_RPMODE_16BIT | VIA_RPMODE_STEREO);
+ mode |= mode_set;
+ via_wr(via, ch->mode, mode, 1);
+
+ return 0;
+}
+
+static int
+viachan_setspeed(kobj_t obj, void *data, u_int32_t speed)
+{
+ struct via_chinfo *ch = data;
+ struct via_info *via = ch->parent;
+ int reg;
+
+ /*
+ * Basic AC'97 defines a 48 kHz sample rate only. For other rates,
+ * upsampling is required.
+ *
+ * The VT82C686A does not perform upsampling, and neither do we.
+ * If the codec supports variable-rate audio (i.e. does the upsampling
+ * itself), then negotiate the rate with the codec. Otherwise,
+ * return 48 kHz cuz that's all you got.
+ */
+ if (via->codec_caps & AC97_EXTCAP_VRA) {
+ reg = (ch->dir == PCMDIR_PLAY)? AC97_REGEXT_FDACRATE : AC97_REGEXT_LADCRATE;
+ return ac97_setrate(via->codec, reg, speed);
+ } else
+ return 48000;
+}
+
+static int
+viachan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
+{
+ struct via_chinfo *ch = data;
+
+ ch->blksz = blocksize;
+ sndbuf_resize(ch->buffer, SEGS_PER_CHAN, ch->blksz);
+
+ return ch->blksz;
+}
+
+static int
+viachan_trigger(kobj_t obj, void *data, int go)
+{
+ struct via_chinfo *ch = data;
+ struct via_info *via = ch->parent;
+ struct via_dma_op *ado;
+
+ if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD)
+ return 0;
+
+ ado = ch->sgd_table;
+ DEB(printf("ado located at va=%p pa=%x\n", ado, vtophys(ado)));
+
+ if (go == PCMTRIG_START) {
+ via_buildsgdt(ch);
+ via_wr(via, ch->base, vtophys(ado), 4);
+ via_wr(via, ch->ctrl, VIA_RPCTRL_START, 1);
+ } else
+ via_wr(via, ch->ctrl, VIA_RPCTRL_TERMINATE, 1);
+
+ DEB(printf("viachan_trigger: go=%d\n", go));
+ return 0;
+}
+
+static int
+viachan_getptr(kobj_t obj, void *data)
+{
+ struct via_chinfo *ch = data;
+ struct via_info *via = ch->parent;
+ struct via_dma_op *ado;
+ int ptr, base, base1, len, seg;
+
+ ado = ch->sgd_table;
+ base1 = via_rd(via, ch->base, 4);
+ len = via_rd(via, ch->count, 4);
+ base = via_rd(via, ch->base, 4);
+ if (base != base1) /* Avoid race hazard */
+ len = via_rd(via, ch->count, 4);
+
+ DEB(printf("viachan_getptr: len / base = %x / %x\n", len, base));
+
+ /* Base points to SGD segment to do, one past current */
+
+ /* Determine how many segments have been done */
+ seg = (base - vtophys(ado)) / sizeof(struct via_dma_op);
+ if (seg == 0)
+ seg = SEGS_PER_CHAN;
+
+ /* Now work out offset: seg less count */
+ ptr = (seg * sndbuf_getsize(ch->buffer) / SEGS_PER_CHAN) - len;
+ if (ch->dir == PCMDIR_REC) {
+ /* DMA appears to operate on memory 'lines' of 32 bytes */
+ /* so don't return any part line - it isn't in RAM yet */
+ ptr = ptr & ~0x1f;
+ }
+
+ DEB(printf("return ptr=%d\n", ptr));
+ return ptr;
+}
+
+static struct pcmchan_caps *
+viachan_getcaps(kobj_t obj, void *data)
+{
+ struct via_chinfo *ch = data;
+ struct via_info *via = ch->parent;
+
+ return (via->codec_caps & AC97_EXTCAP_VRA)? &via_vracaps : &via_caps;
+}
+
+static kobj_method_t viachan_methods[] = {
+ KOBJMETHOD(channel_init, viachan_init),
+ KOBJMETHOD(channel_setformat, viachan_setformat),
+ KOBJMETHOD(channel_setspeed, viachan_setspeed),
+ KOBJMETHOD(channel_setblocksize, viachan_setblocksize),
+ KOBJMETHOD(channel_trigger, viachan_trigger),
+ KOBJMETHOD(channel_getptr, viachan_getptr),
+ KOBJMETHOD(channel_getcaps, viachan_getcaps),
+ { 0, 0 }
+};
+CHANNEL_DECLARE(viachan);
+
+/* -------------------------------------------------------------------- */
+
+static void
+via_intr(void *p)
+{
+ struct via_info *via = p;
+ int st;
+
+ /* DEB(printf("viachan_intr\n")); */
+ /* Read channel */
+ st = via_rd(via, VIA_PLAY_STAT, 1);
+ if (st & VIA_RPSTAT_INTR) {
+ via_wr(via, VIA_PLAY_STAT, VIA_RPSTAT_INTR, 1);
+ chn_intr(via->pch.channel);
+ }
+
+ /* Write channel */
+ st = via_rd(via, VIA_RECORD_STAT, 1);
+ if (st & VIA_RPSTAT_INTR) {
+ via_wr(via, VIA_RECORD_STAT, VIA_RPSTAT_INTR, 1);
+ chn_intr(via->rch.channel);
+ }
+}
+
+/*
+ * Probe and attach the card
+ */
+static int
+via_probe(device_t dev)
+{
+ if (pci_get_devid(dev) == VIA_PCI_ID) {
+ device_set_desc(dev, "VIA VT82C686A");
+ return 0;
+ }
+ return ENXIO;
+}
+
+
+static void
+dma_cb(void *p, bus_dma_segment_t *bds, int a, int b)
+{
+}
+
+
+static int
+via_attach(device_t dev)
+{
+ struct via_info *via = 0;
+ char status[SND_STATUSLEN];
+ u_int32_t data;
+
+ if ((via = malloc(sizeof *via, M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) {
+ device_printf(dev, "cannot allocate softc\n");
+ return ENXIO;
+ }
+
+ /* Get resources */
+ data = pci_read_config(dev, PCIR_COMMAND, 2);
+ data |= (PCIM_CMD_PORTEN | PCIM_CMD_BUSMASTEREN);
+ pci_write_config(dev, PCIR_COMMAND, data, 2);
+ data = pci_read_config(dev, PCIR_COMMAND, 2);
+
+ pci_write_config(dev, VIA_PCICONF_MISC,
+ VIA_PCICONF_ACLINKENAB | VIA_PCICONF_ACSGD | VIA_PCICONF_ACNOTRST | VIA_PCICONF_ACVSR, 1);
+
+ via->regid = PCIR_MAPS;
+ via->reg = bus_alloc_resource(dev, SYS_RES_IOPORT, &via->regid, 0, ~0, 1, RF_ACTIVE);
+ if (!via->reg) {
+ device_printf(dev, "cannot allocate bus resource.");
+ goto bad;
+ }
+ via->st = rman_get_bustag(via->reg);
+ via->sh = rman_get_bushandle(via->reg);
+
+ via->bufsz = pcm_getbuffersize(dev, 4096, VIA_DEFAULT_BUFSZ, 65536);
+
+ via->irqid = 0;
+ via->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &via->irqid, 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
+ if (!via->irq || snd_setup_intr(dev, via->irq, 0, via_intr, via, &via->ih)) {
+ device_printf(dev, "unable to map interrupt\n");
+ goto bad;
+ }
+
+ via_wr(via, VIA_PLAY_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1);
+ via_wr(via, VIA_RECORD_MODE, VIA_RPMODE_AUTOSTART | VIA_RPMODE_INTR_FLAG | VIA_RPMODE_INTR_EOL, 1);
+
+ via->codec = AC97_CREATE(dev, via, via_ac97);
+ if (!via->codec)
+ goto bad;
+
+ mixer_init(dev, ac97_getmixerclass(), via->codec);
+
+ via->codec_caps = ac97_getextcaps(via->codec);
+ ac97_setextmode(via->codec,
+ via->codec_caps & (AC97_EXTCAP_VRA | AC97_EXTCAP_VRM));
+
+ /* DMA tag for buffers */
+ 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*/via->bufsz, /*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,
+ PCM_SOFTC_SIZE,
+};
+
+DRIVER_MODULE(snd_via82c686, pci, via_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_via82c686, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_via82c686, 1);
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