/* $NetBSD: pxa2x0_ac97.c,v 1.13 2012/11/12 18:00:38 skrll Exp $ */ /* * Copyright (c) 2003, 2005 Wasabi Systems, Inc. * All rights reserved. * * Written by Steve C. Woodford for Wasabi Systems, Inc. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed for the NetBSD Project by * Wasabi Systems, Inc. * 4. The name of Wasabi Systems, Inc. may not be used to endorse * or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "locators.h" struct acu_dma { bus_dmamap_t ad_map; void *ad_addr; #define ACU_N_SEGS 1 /* XXX: We don't support > 1 */ bus_dma_segment_t ad_segs[ACU_N_SEGS]; int ad_nsegs; size_t ad_size; struct dmac_xfer *ad_dx; struct acu_dma *ad_next; }; #define KERNADDR(ad) ((void *)((ad)->ad_addr)) struct acu_softc { device_t sc_dev; bus_space_tag_t sc_bust; bus_dma_tag_t sc_dmat; bus_space_handle_t sc_bush; void *sc_irqcookie; int sc_in_reset; u_int sc_dac_rate; u_int sc_adc_rate; /* List of DMA ring-buffers allocated by acu_malloc() */ struct acu_dma *sc_dmas; /* Dummy DMA segment which points to the AC97 PCM Fifo register */ bus_dma_segment_t sc_dr; /* PCM Output (Tx) state */ dmac_peripheral_t sc_txp; struct acu_dma *sc_txdma; void (*sc_txfunc)(void *); void *sc_txarg; /* PCM Input (Rx) state */ dmac_peripheral_t sc_rxp; struct acu_dma *sc_rxdma; void (*sc_rxfunc)(void *); void *sc_rxarg; /* AC97 Codec State */ struct ac97_codec_if *sc_codec_if; struct ac97_host_if sc_host_if; /* Child audio(4) device */ device_t sc_audiodev; /* auconv encodings */ struct audio_encoding_set *sc_encodings; /* MPSAFE interfaces */ kmutex_t sc_lock; kmutex_t sc_intr_lock; }; static int pxaacu_match(device_t, cfdata_t, void *); static void pxaacu_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(pxaacu, sizeof(struct acu_softc), pxaacu_match, pxaacu_attach, NULL, NULL); static int acu_codec_attach(void *, struct ac97_codec_if *); static int acu_codec_read(void *, uint8_t, uint16_t *); static int acu_codec_write(void *, uint8_t, uint16_t); static int acu_codec_reset(void *); static int acu_intr(void *); static int acu_open(void *, int); static void acu_close(void *); static int acu_query_encoding(void *, struct audio_encoding *); static int acu_set_params(void *, int, int, audio_params_t *, audio_params_t *, stream_filter_list_t *, stream_filter_list_t *); static int acu_round_blocksize(void *, int, int, const audio_params_t *); static int acu_halt_output(void *); static int acu_halt_input(void *); static int acu_trigger_output(void *, void *, void *, int, void (*)(void *), void *, const audio_params_t *); static int acu_trigger_input(void *, void *, void *, int, void (*)(void *), void *, const audio_params_t *); static void acu_tx_loop_segment(struct dmac_xfer *, int); static void acu_rx_loop_segment(struct dmac_xfer *, int); static int acu_getdev(void *, struct audio_device *); static int acu_mixer_set_port(void *, mixer_ctrl_t *); static int acu_mixer_get_port(void *, mixer_ctrl_t *); static int acu_query_devinfo(void *, mixer_devinfo_t *); static void *acu_malloc(void *, int, size_t); static void acu_free(void *, void *, size_t); static size_t acu_round_buffersize(void *, int, size_t); static paddr_t acu_mappage(void *, void *, off_t, int); static int acu_get_props(void *); static void acu_get_locks(void *, kmutex_t **, kmutex_t **); struct audio_hw_if acu_hw_if = { acu_open, acu_close, NULL, acu_query_encoding, acu_set_params, acu_round_blocksize, NULL, NULL, NULL, NULL, NULL, acu_halt_output, acu_halt_input, NULL, acu_getdev, NULL, acu_mixer_set_port, acu_mixer_get_port, acu_query_devinfo, acu_malloc, acu_free, acu_round_buffersize, acu_mappage, acu_get_props, acu_trigger_output, acu_trigger_input, NULL, acu_get_locks, }; struct audio_device acu_device = { "PXA250 AC97", "", "acu" }; static const struct audio_format acu_formats[] = { {NULL, AUMODE_PLAY | AUMODE_RECORD, AUDIO_ENCODING_SLINEAR_LE, 16, 16, 2, AUFMT_STEREO, 0, {4000, 48000}} }; #define ACU_NFORMATS (sizeof(acu_formats) / sizeof(struct audio_format)) static inline uint32_t acu_reg_read(struct acu_softc *sc, int reg) { return (bus_space_read_4(sc->sc_bust, sc->sc_bush, reg)); } static inline void acu_reg_write(struct acu_softc *sc, int reg, uint32_t val) { bus_space_write_4(sc->sc_bust, sc->sc_bush, reg, val); } static inline int acu_codec_ready(struct acu_softc *sc) { return (acu_reg_read(sc, AC97_GSR) & GSR_PCR); } static inline int acu_wait_gsr(struct acu_softc *sc, uint32_t bit) { int timeout; uint32_t rv; for (timeout = 5000; timeout; timeout--) { if ((rv = acu_reg_read(sc, AC97_GSR)) & bit) { acu_reg_write(sc, AC97_GSR, rv | bit); return (0); } delay(1); } return (1); } static int pxaacu_match(device_t parent, cfdata_t cf, void *aux) { struct pxaip_attach_args *pxa = aux; struct pxa2x0_gpioconf *gpioconf; u_int gpio; int i; if (pxa->pxa_addr != PXA2X0_AC97_BASE || pxa->pxa_intr != PXA2X0_INT_AC97) return (0); gpioconf = CPU_IS_PXA250 ? pxa25x_pxaacu_gpioconf : pxa27x_pxaacu_gpioconf; for (i = 0; gpioconf[i].pin != -1; i++) { gpio = pxa2x0_gpio_get_function(gpioconf[i].pin); if (GPIO_FN(gpio) != GPIO_FN(gpioconf[i].value) || GPIO_FN_IS_OUT(gpio) != GPIO_FN_IS_OUT(gpioconf[i].value)) return (0); } pxa->pxa_size = PXA2X0_AC97_SIZE; return (1); } static void pxaacu_attach(device_t parent, device_t self, void *aux) { struct acu_softc *sc = device_private(self); struct pxaip_attach_args *pxa = aux; sc->sc_dev = self; sc->sc_bust = pxa->pxa_iot; sc->sc_dmat = pxa->pxa_dmat; aprint_naive("\n"); aprint_normal(": AC97 Controller\n"); if (bus_space_map(sc->sc_bust, pxa->pxa_addr, pxa->pxa_size, 0, &sc->sc_bush)) { aprint_error_dev(self, "Can't map registers!\n"); return; } sc->sc_irqcookie = pxa2x0_intr_establish(pxa->pxa_intr, IPL_AUDIO, acu_intr, sc); KASSERT(sc->sc_irqcookie != NULL); /* Make sure the AC97 clock is enabled */ pxa2x0_clkman_config(CKEN_AC97, true); delay(100); /* Do a cold reset */ acu_reg_write(sc, AC97_GCR, 0); delay(100); acu_reg_write(sc, AC97_GCR, GCR_COLD_RST); delay(100); acu_reg_write(sc, AC97_CAR, 0); if (acu_wait_gsr(sc, GSR_PCR)) { acu_reg_write(sc, AC97_GCR, 0); delay(100); pxa2x0_clkman_config(CKEN_AC97, false); bus_space_unmap(sc->sc_bust, sc->sc_bush, pxa->pxa_size); aprint_error_dev(self, "Primary codec not ready\n"); return; } sc->sc_dr.ds_addr = pxa->pxa_addr + AC97_PCDR; sc->sc_dr.ds_len = 4; sc->sc_codec_if = NULL; sc->sc_host_if.arg = sc; sc->sc_host_if.attach = acu_codec_attach; sc->sc_host_if.read = acu_codec_read; sc->sc_host_if.write = acu_codec_write; sc->sc_host_if.reset = acu_codec_reset; sc->sc_host_if.flags = NULL; sc->sc_in_reset = 0; sc->sc_dac_rate = sc->sc_adc_rate = 0; if (ac97_attach(&sc->sc_host_if, sc->sc_dev, &sc->sc_lock)) { aprint_error_dev(self, "Failed to attach primary codec\n"); fail: acu_reg_write(sc, AC97_GCR, 0); delay(100); pxa2x0_clkman_config(CKEN_AC97, false); bus_space_unmap(sc->sc_bust, sc->sc_bush, pxa->pxa_size); return; } if (auconv_create_encodings(acu_formats, ACU_NFORMATS, &sc->sc_encodings)) { aprint_error_dev(self, "Failed to create encodings\n"); if (sc->sc_codec_if != NULL) (sc->sc_codec_if->vtbl->detach)(sc->sc_codec_if); goto fail; } sc->sc_audiodev = audio_attach_mi(&acu_hw_if, sc, sc->sc_dev); /* * As a work-around for braindamage in the PXA250's AC97 controller * (see errata #125), we hold the ACUNIT/Codec in Cold Reset until * acu_open() is called. acu_close() also puts the controller into * Cold Reset. * * While this won't necessarily prevent Rx FIFO overruns, it at least * allows the user to recover by closing then re-opening the audio * device. */ acu_reg_write(sc, AC97_GCR, 0); sc->sc_in_reset = 1; } static int acu_codec_attach(void *arg, struct ac97_codec_if *aci) { struct acu_softc *sc = arg; sc->sc_codec_if = aci; return (0); } static int acu_codec_read(void *arg, uint8_t codec_reg, uint16_t *valp) { struct acu_softc *sc = arg; uint32_t val; int reg, rv = 1; /* * If we're currently closed, return non-zero. The ac97 frontend * will use its cached copy of the register instead. */ if (sc->sc_in_reset) return (1); reg = AC97_CODEC_BASE(0) + codec_reg * 2; mutex_spin_enter(&sc->sc_intr_lock); if (!acu_codec_ready(sc) || (acu_reg_read(sc, AC97_CAR) & CAR_CAIP)) goto out_nocar; val = acu_reg_read(sc, AC97_GSR); val |= GSR_RDCS | GSR_SDONE; acu_reg_write(sc, AC97_GSR, val); /* * Dummy read to initiate the real read access */ (void) acu_reg_read(sc, reg); if (acu_wait_gsr(sc, GSR_SDONE)) goto out; (void) acu_reg_read(sc, reg); if (acu_wait_gsr(sc, GSR_SDONE)) goto out; val = acu_reg_read(sc, AC97_GSR); if (val & GSR_RDCS) goto out; *valp = acu_reg_read(sc, reg); if (acu_wait_gsr(sc, GSR_SDONE)) goto out; rv = 0; out: acu_reg_write(sc, AC97_CAR, 0); out_nocar: mutex_spin_exit(&sc->sc_intr_lock); delay(10); return (rv); } static int acu_codec_write(void *arg, uint8_t codec_reg, uint16_t val) { struct acu_softc *sc = arg; uint16_t rv; /* * If we're currently closed, chances are the user is just * tweaking mixer settings. Pretend the write succeeded. * The ac97 frontend will cache the value anyway, and it'll * be written correctly when the driver is opened. */ if (sc->sc_in_reset) return (0); mutex_spin_enter(&sc->sc_intr_lock); if (!acu_codec_ready(sc) || (acu_reg_read(sc, AC97_CAR) & CAR_CAIP)) { mutex_spin_exit(&sc->sc_intr_lock); return (1); } rv = acu_reg_read(sc, AC97_GSR); rv |= GSR_RDCS | GSR_CDONE; acu_reg_write(sc, AC97_GSR, rv); acu_reg_write(sc, AC97_CODEC_BASE(0) + codec_reg * 2, val); /* * Wait for the write to complete */ (void) acu_wait_gsr(sc, GSR_CDONE); acu_reg_write(sc, AC97_CAR, 0); mutex_spin_exit(&sc->sc_intr_lock); delay(10); return (0); } static int acu_codec_reset(void *arg) { struct acu_softc *sc = arg; uint32_t rv; rv = acu_reg_read(sc, AC97_GCR); acu_reg_write(sc, AC97_GCR, rv | GCR_WARM_RST); delay(100); acu_reg_write(sc, AC97_GCR, rv); delay(100); if (acu_wait_gsr(sc, GSR_PCR)) { aprint_error_dev(sc->sc_dev, "acu_codec_reset: failed to ready after reset\n"); return (ETIMEDOUT); } return (0); } static int acu_intr(void *arg) { struct acu_softc *sc = arg; uint32_t gsr, reg; mutex_spin_enter(&sc->sc_intr_lock); gsr = acu_reg_read(sc, AC97_GSR); /* * Tx FIFO underruns are no big deal. Just log it and ignore and * subsequent underruns until the next time acu_trigger_output() * is called. */ if ((gsr & GSR_POINT) && (acu_reg_read(sc, AC97_POCR) & AC97_FEFIE)) { acu_reg_write(sc, AC97_POCR, 0); reg = acu_reg_read(sc, AC97_POSR); acu_reg_write(sc, AC97_POSR, reg); aprint_error_dev(sc->sc_dev, "Tx PCM Fifo underrun\n"); } /* * Rx FIFO overruns are a different story. See PAX250 Errata #125 * for the gory details. * I don't see any way to gracefully recover from this problem, * other than a issuing a Cold Reset in acu_close(). * The best we can do here is to report the problem on the console. */ if ((gsr & GSR_PIINT) && (acu_reg_read(sc, AC97_PICR) & AC97_FEFIE)) { acu_reg_write(sc, AC97_PICR, 0); reg = acu_reg_read(sc, AC97_PISR); acu_reg_write(sc, AC97_PISR, reg); aprint_error_dev(sc->sc_dev, "Rx PCM Fifo overrun\n"); } mutex_spin_exit(&sc->sc_intr_lock); return (1); } static int acu_open(void *arg, int flags) { struct acu_softc *sc = arg; /* * Deassert Cold Reset */ acu_reg_write(sc, AC97_GCR, GCR_COLD_RST); delay(100); acu_reg_write(sc, AC97_CAR, 0); /* * Wait for the primary codec to become ready */ if (acu_wait_gsr(sc, GSR_PCR)) return (EIO); sc->sc_in_reset = 0; /* * Restore the codec port settings */ sc->sc_codec_if->vtbl->restore_ports(sc->sc_codec_if); /* * Need to reprogram the sample rates, since 'restore_ports' * doesn't do it. * * XXX: These aren't the only two sample rate registers ... */ if (sc->sc_dac_rate) (void) sc->sc_codec_if->vtbl->set_rate(sc->sc_codec_if, AC97_REG_PCM_FRONT_DAC_RATE, &sc->sc_dac_rate); if (sc->sc_adc_rate) (void) sc->sc_codec_if->vtbl->set_rate(sc->sc_codec_if, AC97_REG_PCM_LR_ADC_RATE, &sc->sc_adc_rate); return (0); } static void acu_close(void *arg) { struct acu_softc *sc = arg; /* * Make sure the hardware is quiescent */ acu_halt_output(sc); acu_halt_input(sc); delay(100); /* Assert Cold Reset */ acu_reg_write(sc, AC97_GCR, 0); sc->sc_in_reset = 1; } static int acu_query_encoding(void *arg, struct audio_encoding *fp) { struct acu_softc *sc = arg; return (auconv_query_encoding(sc->sc_encodings, fp)); } static int acu_set_params(void *arg, int setmode, int usemode, audio_params_t *play, audio_params_t *rec, stream_filter_list_t *pfil, stream_filter_list_t *rfil) { struct acu_softc *sc = arg; struct audio_params *p; stream_filter_list_t *fil; int mode, err; for (mode = AUMODE_RECORD; mode != -1; mode = (mode == AUMODE_RECORD) ? AUMODE_PLAY : -1) { if ((setmode & mode) == 0) continue; p = (mode == AUMODE_PLAY) ? play : rec; if (p->sample_rate < 4000 || p->sample_rate > 48000 || (p->precision != 8 && p->precision != 16) || (p->channels != 1 && p->channels != 2)) { printf("acu_set_params: precision/channels botch\n"); printf("acu_set_params: rate %d, prec %d, chan %d\n", p->sample_rate, p->precision, p->channels); return (EINVAL); } fil = (mode == AUMODE_PLAY) ? pfil : rfil; err = auconv_set_converter(acu_formats, ACU_NFORMATS, mode, p, true, fil); if (err < 0) return (EINVAL); if (mode == AUMODE_PLAY) { err = sc->sc_codec_if->vtbl->set_rate(sc->sc_codec_if, AC97_REG_PCM_FRONT_DAC_RATE, &play->sample_rate); sc->sc_dac_rate = play->sample_rate; } else { err = sc->sc_codec_if->vtbl->set_rate(sc->sc_codec_if, AC97_REG_PCM_LR_ADC_RATE, &rec->sample_rate); sc->sc_adc_rate = rec->sample_rate; } if (err) return (EINVAL); } return (0); } static int acu_round_blocksize(void *arg, int blk, int mode, const audio_params_t *param) { return (blk & ~0x1f); } static int acu_getdev(void *addr, struct audio_device *retp) { *retp = acu_device; return (0); } static int acu_mixer_set_port(void *arg, mixer_ctrl_t *cp) { struct acu_softc *sc = arg; return (sc->sc_codec_if->vtbl->mixer_set_port(sc->sc_codec_if, cp)); } static int acu_mixer_get_port(void *arg, mixer_ctrl_t *cp) { struct acu_softc *sc = arg; return (sc->sc_codec_if->vtbl->mixer_get_port(sc->sc_codec_if, cp)); } static int acu_query_devinfo(void *arg, mixer_devinfo_t *dip) { struct acu_softc *sc = arg; return (sc->sc_codec_if->vtbl->query_devinfo(sc->sc_codec_if, dip)); } static void * acu_malloc(void *arg, int direction, size_t size) { struct acu_softc *sc = arg; struct acu_dma *ad; int error; if ((ad = kmem_alloc(sizeof(*ad), KM_SLEEP)) == NULL) return (NULL); /* XXX */ if ((ad->ad_dx = pxa2x0_dmac_allocate_xfer()) == NULL) goto error; ad->ad_size = size; error = bus_dmamem_alloc(sc->sc_dmat, size, 16, 0, ad->ad_segs, ACU_N_SEGS, &ad->ad_nsegs, BUS_DMA_WAITOK); if (error) goto free_xfer; error = bus_dmamem_map(sc->sc_dmat, ad->ad_segs, ad->ad_nsegs, size, &ad->ad_addr, BUS_DMA_WAITOK | BUS_DMA_COHERENT | BUS_DMA_NOCACHE); if (error) goto free_dmamem; error = bus_dmamap_create(sc->sc_dmat, size, 1, size, 0, BUS_DMA_WAITOK | BUS_DMA_ALLOCNOW, &ad->ad_map); if (error) goto unmap_dmamem; error = bus_dmamap_load(sc->sc_dmat, ad->ad_map, ad->ad_addr, size, NULL, BUS_DMA_WAITOK); if (error) { bus_dmamap_destroy(sc->sc_dmat, ad->ad_map); unmap_dmamem: bus_dmamem_unmap(sc->sc_dmat, ad->ad_addr, size); free_dmamem: bus_dmamem_free(sc->sc_dmat, ad->ad_segs, ad->ad_nsegs); free_xfer: pxa2x0_dmac_free_xfer(ad->ad_dx); error: kmem_free(ad, sizeof(*ad)); return (NULL); } ad->ad_dx->dx_cookie = sc; ad->ad_dx->dx_priority = DMAC_PRIORITY_HIGH; ad->ad_dx->dx_dev_width = DMAC_DEV_WIDTH_4; ad->ad_dx->dx_burst_size = DMAC_BURST_SIZE_32; ad->ad_next = sc->sc_dmas; sc->sc_dmas = ad; return (KERNADDR(ad)); } static void acu_free(void *arg, void *ptr, size_t size) { struct acu_softc *sc = arg; struct acu_dma *ad, **adp; for (adp = &sc->sc_dmas; (ad = *adp) != NULL; adp = &ad->ad_next) { if (KERNADDR(ad) == ptr) { pxa2x0_dmac_abort_xfer(ad->ad_dx); pxa2x0_dmac_free_xfer(ad->ad_dx); ad->ad_segs[0].ds_len = ad->ad_size; /* XXX */ bus_dmamap_unload(sc->sc_dmat, ad->ad_map); bus_dmamap_destroy(sc->sc_dmat, ad->ad_map); bus_dmamem_unmap(sc->sc_dmat, ad->ad_addr, ad->ad_size); bus_dmamem_free(sc->sc_dmat, ad->ad_segs, ad->ad_nsegs); *adp = ad->ad_next; kmem_free(ad, sizeof(*ad)); return; } } } static size_t acu_round_buffersize(void *arg, int direction, size_t size) { return (size); } static paddr_t acu_mappage(void *arg, void *mem, off_t off, int prot) { struct acu_softc *sc = arg; struct acu_dma *ad; if (off < 0) return (-1); for (ad = sc->sc_dmas; ad && KERNADDR(ad) != mem; ad = ad->ad_next) ; if (ad == NULL) return (-1); return (bus_dmamem_mmap(sc->sc_dmat, ad->ad_segs, ad->ad_nsegs, off, prot, BUS_DMA_WAITOK)); } static int acu_get_props(void *arg) { return (AUDIO_PROP_MMAP|AUDIO_PROP_INDEPENDENT|AUDIO_PROP_FULLDUPLEX); } static void acu_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread) { struct acu_softc *sc = opaque; *intr = &sc->sc_intr_lock; *thread = &sc->sc_lock; } static int acu_halt_output(void *arg) { struct acu_softc *sc = arg; mutex_spin_enter(&sc->sc_intr_lock); if (sc->sc_txdma) { acu_reg_write(sc, AC97_POCR, 0); acu_reg_write(sc, AC97_POSR, AC97_FIFOE); pxa2x0_dmac_abort_xfer(sc->sc_txdma->ad_dx); sc->sc_txdma = NULL; } mutex_spin_exit(&sc->sc_intr_lock); return (0); } static int acu_halt_input(void *arg) { struct acu_softc *sc = arg; mutex_spin_enter(&sc->sc_intr_lock); if (sc->sc_rxdma) { acu_reg_write(sc, AC97_PICR, 0); acu_reg_write(sc, AC97_PISR, AC97_FIFOE); pxa2x0_dmac_abort_xfer(sc->sc_rxdma->ad_dx); sc->sc_rxdma = NULL; } mutex_spin_exit(&sc->sc_intr_lock); return (0); } static int acu_trigger_output(void *arg, void *start, void *end, int blksize, void (*tx_func)(void *), void *tx_arg, const audio_params_t *param) { struct acu_softc *sc = arg; struct dmac_xfer *dx; struct acu_dma *ad; int rv; if (sc->sc_txdma) return (EBUSY); sc->sc_txfunc = tx_func; sc->sc_txarg = tx_arg; for (ad = sc->sc_dmas; ad && KERNADDR(ad) != start; ad = ad->ad_next) ; if (ad == NULL) { printf("acu_trigger_output: bad addr %p\n", start); return (EINVAL); } sc->sc_txdma = ad; ad->ad_segs[0].ds_addr = ad->ad_map->dm_segs[0].ds_addr; ad->ad_segs[0].ds_len = (uintptr_t)end - (uintptr_t)start; /* * Fix up a looping DMA request. * The 'done' function will be called for every 'blksize' bytes * transferred by the DMA engine. */ dx = ad->ad_dx; dx->dx_done = acu_tx_loop_segment; dx->dx_peripheral = DMAC_PERIPH_AC97AUDIOTX; dx->dx_flow = DMAC_FLOW_CTRL_DEST; dx->dx_loop_notify = blksize; dx->dx_desc[DMAC_DESC_SRC].xd_addr_hold = false; dx->dx_desc[DMAC_DESC_SRC].xd_nsegs = ad->ad_nsegs; dx->dx_desc[DMAC_DESC_SRC].xd_dma_segs = ad->ad_segs; dx->dx_desc[DMAC_DESC_DST].xd_addr_hold = true; dx->dx_desc[DMAC_DESC_DST].xd_nsegs = 1; dx->dx_desc[DMAC_DESC_DST].xd_dma_segs = &sc->sc_dr; rv = pxa2x0_dmac_start_xfer(dx); if (rv == 0) { /* * XXX: We should only do this once the request has been * loaded into a DMAC channel. */ acu_reg_write(sc, AC97_POSR, AC97_FIFOE); acu_reg_write(sc, AC97_POCR, AC97_FEFIE); } return (rv); } static int acu_trigger_input(void *arg, void *start, void *end, int blksize, void (*rx_func)(void *), void *rx_arg, const audio_params_t *param) { struct acu_softc *sc = arg; struct dmac_xfer *dx; struct acu_dma *ad; int rv; if (sc->sc_rxdma) return (EBUSY); sc->sc_rxfunc = rx_func; sc->sc_rxarg = rx_arg; for (ad = sc->sc_dmas; ad && KERNADDR(ad) != start; ad = ad->ad_next) ; if (ad == NULL) { printf("acu_trigger_input: bad addr %p\n", start); return (EINVAL); } sc->sc_rxdma = ad; ad->ad_segs[0].ds_addr = ad->ad_map->dm_segs[0].ds_addr; ad->ad_segs[0].ds_len = (uintptr_t)end - (uintptr_t)start; /* * Fix up a looping DMA request. * The 'done' function will be called for every 'blksize' bytes * transferred by the DMA engine. */ dx = ad->ad_dx; dx->dx_done = acu_rx_loop_segment; dx->dx_peripheral = DMAC_PERIPH_AC97AUDIORX; dx->dx_flow = DMAC_FLOW_CTRL_SRC; dx->dx_loop_notify = blksize; dx->dx_desc[DMAC_DESC_DST].xd_addr_hold = false; dx->dx_desc[DMAC_DESC_DST].xd_nsegs = ad->ad_nsegs; dx->dx_desc[DMAC_DESC_DST].xd_dma_segs = ad->ad_segs; dx->dx_desc[DMAC_DESC_SRC].xd_addr_hold = true; dx->dx_desc[DMAC_DESC_SRC].xd_nsegs = 1; dx->dx_desc[DMAC_DESC_SRC].xd_dma_segs = &sc->sc_dr; rv = pxa2x0_dmac_start_xfer(dx); if (rv == 0) { /* * XXX: We should only do this once the request has been * loaded into a DMAC channel. */ acu_reg_write(sc, AC97_PISR, AC97_FIFOE); acu_reg_write(sc, AC97_PICR, AC97_FEFIE); } return (rv); } static void acu_tx_loop_segment(struct dmac_xfer *dx, int status) { struct acu_softc *sc = dx->dx_cookie; struct acu_dma *ad; if ((ad = sc->sc_txdma) == NULL) panic("acu_tx_loop_segment: bad TX dma descriptor!"); if (ad->ad_dx != dx) panic("acu_tx_loop_segment: xfer mismatch!"); if (status) { aprint_error_dev(sc->sc_dev, "acu_tx_loop_segment: non-zero completion status %d\n", status); } mutex_spin_enter(&sc->sc_intr_lock); (sc->sc_txfunc)(sc->sc_txarg); mutex_spin_exit(&sc->sc_intr_lock); } static void acu_rx_loop_segment(struct dmac_xfer *dx, int status) { struct acu_softc *sc = dx->dx_cookie; struct acu_dma *ad; if ((ad = sc->sc_rxdma) == NULL) panic("acu_rx_loop_segment: bad RX dma descriptor!"); if (ad->ad_dx != dx) panic("acu_rx_loop_segment: xfer mismatch!"); if (status) { aprint_error_dev(sc->sc_dev, "acu_rx_loop_segment: non-zero completion status %d\n", status); } mutex_spin_enter(&sc->sc_intr_lock); (sc->sc_rxfunc)(sc->sc_rxarg); mutex_spin_exit(&sc->sc_intr_lock); }