/* * 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 <dev/pci/pcireg.h> #include <dev/pci/pcivar.h> #include <sys/sysctl.h> #include <dev/sound/pci/via82c686.h> SND_DECLARE_FILE("$FreeBSD: src/sys/dev/sound/pci/via82c686.c,v 1.31 2004/07/16 03:59:27 tanimura Exp $"); #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; bus_addr_t sgd_addr; 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; bus_addr_t sgd_addr; 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 = sndbuf_getbufaddr(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; if (dir == PCMDIR_PLAY) { ch = &via->pch; ch->base = VIA_PLAY_DMAOPS_BASE; ch->count = VIA_PLAY_DMAOPS_COUNT; ch->ctrl = VIA_PLAY_CONTROL; ch->mode = VIA_PLAY_MODE; ch->sgd_addr = via->sgd_addr; ch->sgd_table = &via->sgd_table[0]; } else { ch = &via->rch; ch->base = VIA_RECORD_DMAOPS_BASE; ch->count = VIA_RECORD_DMAOPS_COUNT; ch->ctrl = VIA_RECORD_CONTROL; ch->mode = VIA_RECORD_MODE; ch->sgd_addr = via->sgd_addr + sizeof(struct via_dma_op) * SEGS_PER_CHAN; ch->sgd_table = &via->sgd_table[SEGS_PER_CHAN]; } ch->parent = via; ch->channel = c; ch->buffer = b; ch->dir = dir; 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; bus_addr_t sgd_addr = ch->sgd_addr; if (go == PCMTRIG_EMLDMAWR || go == PCMTRIG_EMLDMARD) return 0; ado = ch->sgd_table; DEB(printf("ado located at va=%p pa=%x\n", ado, sgd_addr)); if (go == PCMTRIG_START) { via_buildsgdt(ch); via_wr(via, ch->base, sgd_addr, 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; bus_addr_t sgd_addr = ch->sgd_addr; 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 - sgd_addr) / 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) { struct via_info *via = (struct via_info *)p; via->sgd_addr = bds->ds_addr; } static int via_attach(device_t dev) { struct via_info *via = 0; char status[SND_STATUSLEN]; u_int32_t data, cnt; 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); /* Wake up and reset AC97 if necessary */ data = pci_read_config(dev, VIA_AC97STATUS, 1); if ((data & VIA_AC97STATUS_RDY) == 0) { /* Cold reset per ac97r2.3 spec (page 95) */ pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */ DELAY(100); /* Wait T_rst_low */ pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_NRST, 1); /* Assert high */ DELAY(5); /* Wait T_rst2clk */ pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Assert low */ } else { /* Warm reset */ pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */ DELAY(100); pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN | VIA_ACLINK_SYNC, 1); /* Sync */ DELAY(5); /* Wait T_sync_high */ pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_EN, 1); /* Force no sync */ DELAY(5); /* Wait T_sync2clk */ } /* Power everything up */ pci_write_config(dev, VIA_ACLINKCTRL, VIA_ACLINK_DESIRED, 1); /* Wait for codec to become ready (largest reported delay here 310ms) */ for (cnt = 0; cnt < 2000; cnt++) { data = pci_read_config(dev, VIA_AC97STATUS, 1); if (data & VIA_AC97STATUS_RDY) break; DELAY(5000); } via->regid = PCIR_BAR(0); via->reg = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &via->regid, 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_any(dev, SYS_RES_IRQ, &via->irqid, 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; if (mixer_init(dev, ac97_getmixerclass(), via->codec)) goto bad; 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, /*lockfunc*/busdma_lock_mutex, /*lockarg*/&Giant, &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, /*lockfunc*/busdma_lock_mutex, /*lockarg*/&Giant, &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) != 0) goto bad; if (bus_dmamap_load(via->sgd_dmat, via->sgd_dmamap, via->sgd_table, NSEGS * sizeof(struct via_dma_op), dma_cb, via, 0) != 0) goto bad; snprintf(status, SND_STATUSLEN, "at io 0x%lx irq %ld %s", rman_get_start(via->reg), rman_get_start(via->irq), PCM_KLDSTRING(snd_via82c686)); /* 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, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER); MODULE_VERSION(snd_via82c686, 1);