/* $NetBSD: bwdsp.c,v 1.2.2.2 2024/02/03 11:47:04 martin Exp $ */ /*- * Copyright (c) 2024 Jared McNeill * 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 ``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 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 __KERNEL_RCSID(0, "$NetBSD: bwdsp.c,v 1.2.2.2 2024/02/03 11:47:04 martin Exp $"); #include #include #include #include #include #include #include #include #include "mainbus.h" #include "bwai.h" #define BWDSP_MAP_FLAGS BUS_DMA_NOCACHE #define DSP_DMA_START_ADDR_H 0x30 #define DSP_DMA_START_ADDR_L 0x32 #define DSP_DMA_CONTROL_LENGTH 0x36 #define DSP_DMA_CONTROL_LENGTH_CTRL __BIT(15) #define DSP_DMA_CONTROL_LENGTH_NUM_CLS __BITS(14,0) #define DSP_DMA_ALIGN 32 #define DSP_DMA_MAX_BUFSIZE (DSP_DMA_CONTROL_LENGTH_NUM_CLS * 32) struct bwdsp_dma { LIST_ENTRY(bwdsp_dma) dma_list; bus_dmamap_t dma_map; void *dma_addr; size_t dma_size; bus_dma_segment_t dma_segs[1]; int dma_nsegs; }; struct bwdsp_softc { device_t sc_dev; bus_space_tag_t sc_bst; bus_space_handle_t sc_bsh; bus_dma_tag_t sc_dmat; LIST_HEAD(, bwdsp_dma) sc_dmalist; kmutex_t sc_lock; kmutex_t sc_intr_lock; struct audio_format sc_format; audio_dai_tag_t sc_dai; }; #define RD2(sc, reg) \ bus_space_read_2((sc)->sc_bst, (sc)->sc_bsh, (reg)) #define WR2(sc, reg, val) \ bus_space_write_2((sc)->sc_bst, (sc)->sc_bsh, (reg), (val)) static int bwdsp_allocdma(struct bwdsp_softc *sc, size_t size, size_t align, struct bwdsp_dma *dma) { int error; dma->dma_size = size; error = bus_dmamem_alloc(sc->sc_dmat, dma->dma_size, align, 0, dma->dma_segs, 1, &dma->dma_nsegs, BUS_DMA_WAITOK); if (error) return error; error = bus_dmamem_map(sc->sc_dmat, dma->dma_segs, dma->dma_nsegs, dma->dma_size, &dma->dma_addr, BUS_DMA_WAITOK | BWDSP_MAP_FLAGS); if (error) goto free; error = bus_dmamap_create(sc->sc_dmat, dma->dma_size, dma->dma_nsegs, dma->dma_size, 0, BUS_DMA_WAITOK, &dma->dma_map); if (error) goto unmap; error = bus_dmamap_load(sc->sc_dmat, dma->dma_map, dma->dma_addr, dma->dma_size, NULL, BUS_DMA_WAITOK); if (error) goto destroy; return 0; destroy: bus_dmamap_destroy(sc->sc_dmat, dma->dma_map); unmap: bus_dmamem_unmap(sc->sc_dmat, dma->dma_addr, dma->dma_size); free: bus_dmamem_free(sc->sc_dmat, dma->dma_segs, dma->dma_nsegs); return error; } static void bwdsp_freedma(struct bwdsp_softc *sc, struct bwdsp_dma *dma) { bus_dmamap_unload(sc->sc_dmat, dma->dma_map); bus_dmamap_destroy(sc->sc_dmat, dma->dma_map); bus_dmamem_unmap(sc->sc_dmat, dma->dma_addr, dma->dma_size); bus_dmamem_free(sc->sc_dmat, dma->dma_segs, dma->dma_nsegs); } static int bwdsp_query_format(void *priv, audio_format_query_t *afp) { struct bwdsp_softc * const sc = priv; return audio_query_format(&sc->sc_format, 1, afp); } static int bwdsp_set_format(void *priv, int setmode, const audio_params_t *play, const audio_params_t *rec, audio_filter_reg_t *pfil, audio_filter_reg_t *rfil) { struct bwdsp_softc * const sc = priv; return audio_dai_mi_set_format(sc->sc_dai, setmode, play, rec, pfil, rfil); } static int bwdsp_set_port(void *priv, mixer_ctrl_t *mc) { struct bwdsp_softc * const sc = priv; return audio_dai_set_port(sc->sc_dai, mc); } static int bwdsp_get_port(void *priv, mixer_ctrl_t *mc) { struct bwdsp_softc * const sc = priv; return audio_dai_get_port(sc->sc_dai, mc); } static int bwdsp_query_devinfo(void *priv, mixer_devinfo_t *di) { struct bwdsp_softc * const sc = priv; return audio_dai_query_devinfo(sc->sc_dai, di); } static void * bwdsp_allocm(void *priv, int dir, size_t size) { struct bwdsp_softc * const sc = priv; struct bwdsp_dma *dma; int error; dma = kmem_alloc(sizeof(*dma), KM_SLEEP); error = bwdsp_allocdma(sc, size, DSP_DMA_ALIGN, dma); if (error) { kmem_free(dma, sizeof(*dma)); device_printf(sc->sc_dev, "couldn't allocate DMA memory (%d)\n", error); return NULL; } LIST_INSERT_HEAD(&sc->sc_dmalist, dma, dma_list); return dma->dma_addr; } static void bwdsp_freem(void *priv, void *addr, size_t size) { struct bwdsp_softc * const sc = priv; struct bwdsp_dma *dma; LIST_FOREACH(dma, &sc->sc_dmalist, dma_list) if (dma->dma_addr == addr) { bwdsp_freedma(sc, dma); LIST_REMOVE(dma, dma_list); kmem_free(dma, sizeof(*dma)); break; } } static int bwdsp_getdev(void *priv, struct audio_device *adev) { snprintf(adev->name, sizeof(adev->name), "Broadway DSP"); snprintf(adev->version, sizeof(adev->version), ""); snprintf(adev->config, sizeof(adev->config), "bwdsp"); return 0; } static int bwdsp_get_props(void *priv) { return AUDIO_PROP_PLAYBACK; } static int bwdsp_round_blocksize(void *priv, int bs, int mode, const audio_params_t *params) { bs = roundup(bs, DSP_DMA_ALIGN); if (bs > DSP_DMA_MAX_BUFSIZE) { bs = DSP_DMA_MAX_BUFSIZE; } return bs; } static size_t bwdsp_round_buffersize(void *priv, int dir, size_t bufsize) { if (bufsize > DSP_DMA_MAX_BUFSIZE) { bufsize = DSP_DMA_MAX_BUFSIZE; } return bufsize; } static void bwdsp_transfer(struct bwdsp_softc *sc, uint32_t phys_addr, size_t bufsize) { if (bufsize != 0) { WR2(sc, DSP_DMA_START_ADDR_H, phys_addr >> 16); WR2(sc, DSP_DMA_START_ADDR_L, phys_addr & 0xffff); WR2(sc, DSP_DMA_CONTROL_LENGTH, DSP_DMA_CONTROL_LENGTH_CTRL | (bufsize / 32)); } else { WR2(sc, DSP_DMA_CONTROL_LENGTH, 0); } } static int bwdsp_trigger_output(void *priv, void *start, void *end, int blksize, void (*intr)(void *), void *intrarg, const audio_params_t *params) { struct bwdsp_softc * const sc = priv; struct bwdsp_dma *dma; bus_addr_t pstart; bus_size_t psize; int error; pstart = 0; psize = (uintptr_t)end - (uintptr_t)start; LIST_FOREACH(dma, &sc->sc_dmalist, dma_list) if (dma->dma_addr == start) { pstart = dma->dma_map->dm_segs[0].ds_addr; break; } if (pstart == 0) { device_printf(sc->sc_dev, "bad addr %p\n", start); return EINVAL; } error = audio_dai_trigger(sc->sc_dai, start, end, blksize, intr, intrarg, params, AUMODE_PLAY); if (error != 0) { return error; } /* Start DMA transfer */ bwdsp_transfer(sc, pstart, psize); return 0; } static int bwdsp_halt_output(void *priv) { struct bwdsp_softc * const sc = priv; /* Stop DMA transfer */ bwdsp_transfer(sc, 0, 0); return audio_dai_halt(sc->sc_dai, AUMODE_PLAY); } static void bwdsp_get_locks(void *priv, kmutex_t **intr, kmutex_t **thread) { struct bwdsp_softc * const sc = priv; *intr = &sc->sc_intr_lock; *thread = &sc->sc_lock; } static const struct audio_hw_if bwdsp_hw_if = { .query_format = bwdsp_query_format, .set_format = bwdsp_set_format, .allocm = bwdsp_allocm, .freem = bwdsp_freem, .getdev = bwdsp_getdev, .set_port = bwdsp_set_port, .get_port = bwdsp_get_port, .query_devinfo = bwdsp_query_devinfo, .get_props = bwdsp_get_props, .round_blocksize = bwdsp_round_blocksize, .round_buffersize = bwdsp_round_buffersize, .trigger_output = bwdsp_trigger_output, .halt_output = bwdsp_halt_output, .get_locks = bwdsp_get_locks, }; static void bwdsp_late_attach(device_t dev) { struct bwdsp_softc * const sc = device_private(dev); sc->sc_dai = bwai_dsp_init(&sc->sc_intr_lock); if (sc->sc_dai == NULL) { aprint_error_dev(dev, "can't find bwai device\n"); return; } audio_attach_mi(&bwdsp_hw_if, sc, dev); } static int bwdsp_match(device_t parent, cfdata_t cf, void *aux) { struct mainbus_attach_args * const maa = aux; return strcmp(maa->maa_name, "bwdsp") == 0; } static void bwdsp_attach(device_t parent, device_t self, void *aux) { struct bwdsp_softc * const sc = device_private(self); struct mainbus_attach_args * const maa = aux; bus_addr_t addr = maa->maa_addr; bus_size_t size = 0x200; sc->sc_dev = self; sc->sc_bst = maa->maa_bst; if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) { aprint_error(": couldn't map registers\n"); return; } sc->sc_dmat = maa->maa_dmat; LIST_INIT(&sc->sc_dmalist); mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_SCHED); aprint_naive("\n"); aprint_normal(": DSP\n"); sc->sc_format.mode = AUMODE_PLAY; sc->sc_format.encoding = AUDIO_ENCODING_SLINEAR_BE; sc->sc_format.validbits = 16; sc->sc_format.precision = 16; sc->sc_format.channels = 2; sc->sc_format.channel_mask = AUFMT_STEREO; sc->sc_format.frequency_type = 1; sc->sc_format.frequency[0] = 48000; config_defer(self, bwdsp_late_attach); } CFATTACH_DECL_NEW(bwdsp, sizeof(struct bwdsp_softc), bwdsp_match, bwdsp_attach, NULL, NULL);