/* $OpenBSD: bba.c,v 1.4 2014/07/12 18:48:52 tedu Exp $ */ /* $NetBSD: bba.c,v 1.38 2011/06/04 01:27:57 tsutsui Exp $ */ /* * Copyright (c) 2011 Miodrag Vallat. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* * Copyright (c) 2000 The NetBSD Foundation, Inc. * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* maxine/alpha baseboard audio (bba) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef AUDIO_DEBUG #define DPRINTF(x) if (am7930debug) printf x #else #define DPRINTF(x) #endif /* AUDIO_DEBUG */ #define BBA_MAX_DMA_SEGMENTS 16 #define BBA_DMABUF_SIZE (BBA_MAX_DMA_SEGMENTS*IOASIC_DMA_BLOCKSIZE) #define BBA_DMABUF_ALIGN IOASIC_DMA_BLOCKSIZE #define BBA_DMABUF_BOUNDARY 0 struct bba_mem { struct bba_mem *next; bus_addr_t addr; bus_size_t size; void *kva; }; struct bba_dma_state { bus_dmamap_t dmam; /* DMA map */ size_t size; int active; int curseg; /* current segment in DMA buffer */ void (*intr)(void *); /* higher-level audio handler */ void *intr_arg; }; struct bba_softc { struct am7930_softc sc_am7930; /* glue to MI code */ bus_space_tag_t sc_bst; /* IOASIC bus tag/handle */ bus_space_handle_t sc_bsh; bus_dma_tag_t sc_dmat; bus_space_handle_t sc_codec_bsh; /* codec bus space handle */ struct bba_mem *sc_mem_head; /* list of buffers */ struct bba_dma_state sc_tx_dma_state; struct bba_dma_state sc_rx_dma_state; }; int bba_match(struct device *, void *, void *); void bba_attach(struct device *, struct device *, void *); struct cfdriver bba_cd = { NULL, "bba", DV_DULL }; const struct cfattach bba_ca = { sizeof(struct bba_softc), bba_match, bba_attach }; /* * Define our interface into the am7930 MI driver. */ uint8_t bba_codec_iread(struct am7930_softc *, int); uint16_t bba_codec_iread16(struct am7930_softc *, int); void bba_codec_iwrite(struct am7930_softc *, int, uint8_t); void bba_codec_iwrite16(struct am7930_softc *, int, uint16_t); void bba_onopen(struct am7930_softc *); void bba_onclose(struct am7930_softc *); void bba_output_conv(void *, u_char *, int); void bba_input_conv(void *, u_char *, int); struct am7930_glue bba_glue = { bba_codec_iread, bba_codec_iwrite, bba_codec_iread16, bba_codec_iwrite16, bba_onopen, bba_onclose, 4, bba_input_conv, bba_output_conv }; /* * Define our interface to the higher level audio driver. */ int bba_round_blocksize(void *, int); int bba_halt_output(void *); int bba_halt_input(void *); int bba_getdev(void *, struct audio_device *); void *bba_allocm(void *, int, size_t, int, int); void bba_freem(void *, void *, int); size_t bba_round_buffersize(void *, int, size_t); int bba_get_props(void *); paddr_t bba_mappage(void *, void *, off_t, int); int bba_trigger_output(void *, void *, void *, int, void (*)(void *), void *, struct audio_params *); int bba_trigger_input(void *, void *, void *, int, void (*)(void *), void *, struct audio_params *); struct audio_hw_if bba_hw_if = { am7930_open, am7930_close, NULL, am7930_query_encoding, am7930_set_params, bba_round_blocksize, /* md */ am7930_commit_settings, NULL, NULL, NULL, NULL, bba_halt_output, /* md */ bba_halt_input, /* md */ NULL, bba_getdev, NULL, am7930_set_port, am7930_get_port, am7930_query_devinfo, bba_allocm, /* md */ bba_freem, /* md */ bba_round_buffersize, /* md */ bba_mappage, bba_get_props, bba_trigger_output, /* md */ bba_trigger_input, /* md */ NULL }; static struct audio_device bba_device = { "am7930", "x", "bba" }; int bba_intr(void *); void bba_reset(struct bba_softc *, int); void bba_codec_dwrite(struct am7930_softc *, int, uint8_t); uint8_t bba_codec_dread(struct am7930_softc *, int); int bba_match(struct device *parent, void *vcf, void *aux) { struct ioasicdev_attach_args *ia = aux; if (strcmp(ia->iada_modname, "isdn") != 0 && strcmp(ia->iada_modname, "AMD79c30") != 0) return 0; return 1; } void bba_attach(struct device *parent, struct device *self, void *aux) { struct ioasicdev_attach_args *ia = aux; struct bba_softc *sc = (struct bba_softc *)self; struct ioasic_softc *iosc = (struct ioasic_softc *)parent; sc->sc_bst = iosc->sc_bst; sc->sc_bsh = iosc->sc_bsh; sc->sc_dmat = iosc->sc_dmat; /* get the bus space handle for codec */ if (bus_space_subregion(sc->sc_bst, sc->sc_bsh, ia->iada_offset, 0, &sc->sc_codec_bsh)) { printf(": unable to map device\n"); return; } printf("\n"); bba_reset(sc,1); /* * Set up glue for MI code early; we use some of it here. */ sc->sc_am7930.sc_glue = &bba_glue; /* * MI initialisation. We will be doing DMA. */ am7930_init(&sc->sc_am7930, AUDIOAMD_DMA_MODE); ioasic_intr_establish(parent, ia->iada_cookie, IPL_AUDIO, bba_intr, sc, self->dv_xname); audio_attach_mi(&bba_hw_if, sc, self); } void bba_onopen(struct am7930_softc *sc) { } void bba_onclose(struct am7930_softc *sc) { } void bba_reset(struct bba_softc *sc, int reset) { uint32_t ssr; /* disable any DMA and reset the codec */ ssr = bus_space_read_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR); ssr &= ~(IOASIC_CSR_DMAEN_ISDN_T | IOASIC_CSR_DMAEN_ISDN_R); if (reset) ssr &= ~IOASIC_CSR_ISDN_ENABLE; bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR, ssr); DELAY(10); /* 400ns required for codec to reset */ /* initialise DMA pointers */ bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_X_DMAPTR, 0); bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_X_NEXTPTR, 0); bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_R_DMAPTR, 0); bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_R_NEXTPTR, 0); /* take out of reset state */ if (reset) { ssr |= IOASIC_CSR_ISDN_ENABLE; bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR, ssr); } } void * bba_allocm(void *v, int direction, size_t size, int mtype, int flags) { struct bba_softc *sc = v; bus_dma_segment_t seg; int rseg; caddr_t kva; struct bba_mem *m; int w; int state; DPRINTF(("bba_allocm: size = %zu\n", size)); state = 0; w = (flags & M_NOWAIT) ? BUS_DMA_NOWAIT : BUS_DMA_WAITOK; if (bus_dmamem_alloc(sc->sc_dmat, size, BBA_DMABUF_ALIGN, BBA_DMABUF_BOUNDARY, &seg, 1, &rseg, w)) { printf("%s: can't allocate DMA buffer\n", sc->sc_am7930.sc_dev.dv_xname); goto bad; } state |= 1; if (bus_dmamem_map(sc->sc_dmat, &seg, rseg, size, &kva, w | BUS_DMA_COHERENT)) { printf("%s: can't map DMA buffer\n", sc->sc_am7930.sc_dev.dv_xname); goto bad; } state |= 2; m = malloc(sizeof(struct bba_mem), mtype, flags | M_CANFAIL); if (m == NULL) goto bad; m->addr = seg.ds_addr; m->size = seg.ds_len; m->kva = kva; m->next = sc->sc_mem_head; sc->sc_mem_head = m; return (void *)kva; bad: if (state & 2) bus_dmamem_unmap(sc->sc_dmat, kva, size); if (state & 1) bus_dmamem_free(sc->sc_dmat, &seg, 1); return NULL; } void bba_freem(void *v, void *ptr, int mtype) { struct bba_softc *sc = v; struct bba_mem **mp, *m; bus_dma_segment_t seg; void *kva; kva = (void *)ptr; for (mp = &sc->sc_mem_head; *mp && (*mp)->kva != kva; mp = &(*mp)->next) continue; m = *mp; if (m == NULL) { printf("bba_freem: freeing unallocated memory\n"); return; } *mp = m->next; bus_dmamem_unmap(sc->sc_dmat, kva, m->size); seg.ds_addr = m->addr; seg.ds_len = m->size; bus_dmamem_free(sc->sc_dmat, &seg, 1); free(m, mtype, 0); } size_t bba_round_buffersize(void *v, int direction, size_t size) { DPRINTF(("bba_round_buffersize: size=%zu\n", size)); return size > BBA_DMABUF_SIZE ? BBA_DMABUF_SIZE : roundup(size, IOASIC_DMA_BLOCKSIZE); } int bba_halt_output(void *v) { struct bba_softc *sc = v; struct bba_dma_state *d; uint32_t ssr; mtx_enter(&audio_lock); d = &sc->sc_tx_dma_state; /* disable any DMA */ ssr = bus_space_read_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR); ssr &= ~IOASIC_CSR_DMAEN_ISDN_T; bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR, ssr); bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_X_DMAPTR, 0); bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_X_NEXTPTR, 0); mtx_leave(&audio_lock); if (d->active) { bus_dmamap_sync(sc->sc_dmat, d->dmam, 0, d->size, BUS_DMASYNC_POSTWRITE); bus_dmamap_unload(sc->sc_dmat, d->dmam); bus_dmamap_destroy(sc->sc_dmat, d->dmam); d->active = 0; } return 0; } int bba_halt_input(void *v) { struct bba_softc *sc = v; struct bba_dma_state *d; uint32_t ssr; mtx_enter(&audio_lock); d = &sc->sc_rx_dma_state; /* disable any DMA */ ssr = bus_space_read_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR); ssr &= ~IOASIC_CSR_DMAEN_ISDN_R; bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR, ssr); bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_R_DMAPTR, 0); bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_R_NEXTPTR, 0); mtx_leave(&audio_lock); if (d->active) { bus_dmamap_sync(sc->sc_dmat, d->dmam, 0, d->size, BUS_DMASYNC_POSTREAD); bus_dmamap_unload(sc->sc_dmat, d->dmam); bus_dmamap_destroy(sc->sc_dmat, d->dmam); d->active = 0; } return 0; } int bba_getdev(void *v, struct audio_device *retp) { *retp = bba_device; return 0; } int bba_trigger_output(void *v, void *start, void *end, int blksize, void (*intr)(void *), void *arg, struct audio_params *param) { struct bba_softc *sc = v; struct bba_dma_state *d; uint32_t ssr; tc_addr_t phys, nphys; int state; DPRINTF(("bba_trigger_output: sc=%p start=%p end=%p blksize=%d intr=%p(%p)\n", sc, start, end, blksize, intr, arg)); d = &sc->sc_tx_dma_state; state = 0; /* disable any DMA */ ssr = bus_space_read_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR); ssr &= ~IOASIC_CSR_DMAEN_ISDN_T; bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR, ssr); d->size = (vaddr_t)end - (vaddr_t)start; if (bus_dmamap_create(sc->sc_dmat, d->size, BBA_MAX_DMA_SEGMENTS, IOASIC_DMA_BLOCKSIZE, BBA_DMABUF_BOUNDARY, BUS_DMA_NOWAIT, &d->dmam)) { printf("bba_trigger_output: can't create DMA map\n"); goto bad; } state |= 1; if (bus_dmamap_load(sc->sc_dmat, d->dmam, start, d->size, NULL, BUS_DMA_WRITE | BUS_DMA_NOWAIT)) { printf("bba_trigger_output: can't load DMA map\n"); goto bad; } bus_dmamap_sync(sc->sc_dmat, d->dmam, 0, d->size, BUS_DMASYNC_PREWRITE); state |= 2; d->intr = intr; d->intr_arg = arg; d->curseg = 1; /* get physical address of buffer start */ phys = (tc_addr_t)d->dmam->dm_segs[0].ds_addr; nphys = (tc_addr_t)d->dmam->dm_segs[1 % d->dmam->dm_nsegs].ds_addr; /* setup DMA pointer */ bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_X_DMAPTR, IOASIC_DMA_ADDR(phys)); bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_X_NEXTPTR, IOASIC_DMA_ADDR(nphys)); /* kick off DMA */ mtx_enter(&audio_lock); ssr |= IOASIC_CSR_DMAEN_ISDN_T; bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR, ssr); d->active = 1; mtx_leave(&audio_lock); return 0; bad: if (state & 2) bus_dmamap_unload(sc->sc_dmat, d->dmam); if (state & 1) bus_dmamap_destroy(sc->sc_dmat, d->dmam); return 1; } int bba_trigger_input(void *v, void *start, void *end, int blksize, void (*intr)(void *), void *arg, struct audio_params *param) { struct bba_softc *sc = v; struct bba_dma_state *d; uint32_t ssr; tc_addr_t phys, nphys; int state; DPRINTF(("bba_trigger_input: sc=%p start=%p end=%p blksize=%d intr=%p(%p)\n", sc, start, end, blksize, intr, arg)); d = &sc->sc_rx_dma_state; state = 0; /* disable any DMA */ ssr = bus_space_read_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR); ssr &= ~IOASIC_CSR_DMAEN_ISDN_R; bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR, ssr); d->size = (vaddr_t)end - (vaddr_t)start; if (bus_dmamap_create(sc->sc_dmat, d->size, BBA_MAX_DMA_SEGMENTS, IOASIC_DMA_BLOCKSIZE, BBA_DMABUF_BOUNDARY, BUS_DMA_NOWAIT, &d->dmam)) { printf("bba_trigger_input: can't create DMA map\n"); goto bad; } state |= 1; if (bus_dmamap_load(sc->sc_dmat, d->dmam, start, d->size, NULL, BUS_DMA_READ | BUS_DMA_NOWAIT)) { printf("bba_trigger_input: can't load DMA map\n"); goto bad; } bus_dmamap_sync(sc->sc_dmat, d->dmam, 0, d->size, BUS_DMASYNC_PREREAD); state |= 2; d->intr = intr; d->intr_arg = arg; d->curseg = 1; /* get physical address of buffer start */ phys = (tc_addr_t)d->dmam->dm_segs[0].ds_addr; nphys = (tc_addr_t)d->dmam->dm_segs[1 % d->dmam->dm_nsegs].ds_addr; /* setup DMA pointer */ bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_R_DMAPTR, IOASIC_DMA_ADDR(phys)); bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_R_NEXTPTR, IOASIC_DMA_ADDR(nphys)); /* kick off DMA */ mtx_enter(&audio_lock); ssr |= IOASIC_CSR_DMAEN_ISDN_R; bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_CSR, ssr); d->active = 1; mtx_leave(&audio_lock); return 0; bad: if (state & 2) bus_dmamap_unload(sc->sc_dmat, d->dmam); if (state & 1) bus_dmamap_destroy(sc->sc_dmat, d->dmam); return 1; } int bba_intr(void *v) { struct bba_softc *sc = v; struct bba_dma_state *d; tc_addr_t nphys; int mask; mtx_enter(&audio_lock); mask = bus_space_read_4(sc->sc_bst, sc->sc_bsh, IOASIC_INTR); if (mask & IOASIC_INTR_ISDN_TXLOAD) { d = &sc->sc_tx_dma_state; d->curseg = (d->curseg+1) % d->dmam->dm_nsegs; nphys = (tc_addr_t)d->dmam->dm_segs[d->curseg].ds_addr; bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_X_NEXTPTR, IOASIC_DMA_ADDR(nphys)); if (d->intr != NULL) (*d->intr)(d->intr_arg); } if (mask & IOASIC_INTR_ISDN_RXLOAD) { d = &sc->sc_rx_dma_state; d->curseg = (d->curseg+1) % d->dmam->dm_nsegs; nphys = (tc_addr_t)d->dmam->dm_segs[d->curseg].ds_addr; bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_ISDN_R_NEXTPTR, IOASIC_DMA_ADDR(nphys)); if (d->intr != NULL) (*d->intr)(d->intr_arg); } mtx_leave(&audio_lock); return 0; } int bba_get_props(void *v) { return AUDIO_PROP_MMAP | am7930_get_props(v); } paddr_t bba_mappage(void *v, void *mem, off_t offset, int prot) { struct bba_softc *sc = v; struct bba_mem **mp; bus_dma_segment_t seg; if (offset < 0) return -1; for (mp = &sc->sc_mem_head; *mp && (*mp)->kva != mem; mp = &(*mp)->next) continue; if (*mp == NULL) return -1; seg.ds_addr = (*mp)->addr; seg.ds_len = (*mp)->size; return bus_dmamem_mmap(sc->sc_dmat, &seg, 1, offset, prot, BUS_DMA_WAITOK); } void bba_input_conv(void *v, u_char *p, int cc) { struct bba_softc *sc = v; u_char *p0 = p; int cc0 = cc; uint32_t *q = (uint32_t *)p; DPRINTF(("bba_input_conv(): v=%p p=%p cc=%d\n", v, p, cc)); /* convert data from dma stream - one byte per longword<23:16> */ #ifdef __alpha__ /* try to avoid smaller than 32 bit accesses whenever possible */ if (((vaddr_t)p & 3) == 0) { while (cc >= 4) { uint32_t fp; /* alpha is little endian */ fp = (*q++ >> 16) & 0xff; fp |= ((*q++ >> 16) & 0xff) << 8; fp |= ((*q++ >> 16) & 0xff) << 16; fp |= ((*q++ >> 16) & 0xff) << 24; *(uint32_t *)p = fp; p += 4; cc -= 4; } } #endif while (--cc >= 0) *p++ = (*q++ >> 16) & 0xff; /* convert mulaw data to expected encoding if necessary */ if (sc->sc_am7930.rec_sw_code != NULL) (*sc->sc_am7930.rec_sw_code)(v, p0, cc0); } void bba_output_conv(void *v, u_char *p, int cc) { struct bba_softc *sc = v; uint32_t *q = (uint32_t *)p; DPRINTF(("bba_output_conv(): v=%p p=%p cc=%d\n", v, p, cc)); /* convert data to mulaw first if necessary */ if (sc->sc_am7930.play_sw_code != NULL) (*sc->sc_am7930.play_sw_code)(v, p, cc); /* convert data to dma stream - one byte per longword<23:16> */ p += cc; q += cc; #ifdef __alpha__ /* try to avoid smaller than 32 bit accesses whenever possible */ if (((vaddr_t)p & 3) == 0) { while (cc >= 4) { uint32_t fp; p -= 4; fp = *(uint32_t *)p; /* alpha is little endian */ *--q = ((fp >> 24) & 0xff) << 16; *--q = ((fp >> 16) & 0xff) << 16; *--q = ((fp >> 8) & 0xff) << 16; *--q = (fp & 0xff) << 16; cc -= 4; } } #endif while (--cc >= 0) *--q = *--p << 16; } int bba_round_blocksize(void *v, int blk) { return IOASIC_DMA_BLOCKSIZE; } /* indirect write */ void bba_codec_iwrite(struct am7930_softc *sc, int reg, uint8_t val) { DPRINTF(("bba_codec_iwrite(): sc=%p, reg=%02x, val=%02x\n", sc, reg, val)); bba_codec_dwrite(sc, AM7930_DREG_CR, reg); bba_codec_dwrite(sc, AM7930_DREG_DR, val); } void bba_codec_iwrite16(struct am7930_softc *sc, int reg, uint16_t val) { DPRINTF(("bba_codec_iwrite16(): sc=%p, reg=%02x, val=%04x\n", sc, reg, val)); bba_codec_dwrite(sc, AM7930_DREG_CR, reg); bba_codec_dwrite(sc, AM7930_DREG_DR, val); bba_codec_dwrite(sc, AM7930_DREG_DR, val >> 8); } /* indirect read */ uint8_t bba_codec_iread(struct am7930_softc *sc, int reg) { uint8_t val; DPRINTF(("bba_codec_iread(): sc=%p, reg=%02x\n", sc, reg)); bba_codec_dwrite(sc, AM7930_DREG_CR, reg); val = bba_codec_dread(sc, AM7930_DREG_DR); DPRINTF(("read 0x%02x (%d)\n", val, val)); return val; } uint16_t bba_codec_iread16(struct am7930_softc *sc, int reg) { uint16_t val; DPRINTF(("bba_codec_iread16(): sc=%p, reg=%02x\n", sc, reg)); bba_codec_dwrite(sc, AM7930_DREG_CR, reg); val = bba_codec_dread(sc, AM7930_DREG_DR); val |= bba_codec_dread(sc, AM7930_DREG_DR) << 8; return val; } /* direct write */ void bba_codec_dwrite(struct am7930_softc *asc, int reg, uint8_t val) { struct bba_softc *sc = (struct bba_softc *)asc; #if defined(__alpha__) bus_space_write_4(sc->sc_bst, sc->sc_codec_bsh, reg << 2, val << 8); #else bus_space_write_4(sc->sc_bst, sc->sc_codec_bsh, reg << 6, val); #endif } /* direct read */ uint8_t bba_codec_dread(struct am7930_softc *asc, int reg) { struct bba_softc *sc = (struct bba_softc *)asc; #if defined(__alpha__) return (bus_space_read_4(sc->sc_bst, sc->sc_codec_bsh, reg << 2) >> 8) & 0xff; #else return bus_space_read_4(sc->sc_bst, sc->sc_codec_bsh, reg << 6) & 0xff; #endif }