/* * Au12x0/Au1550 PSC ALSA ASoC audio support. * * (c) 2007-2008 MSC Vertriebsges.m.b.H., * Manuel Lauss * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * DMA glue for Au1x-PSC audio. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include "psc.h" /*#define PCM_DEBUG*/ #define MSG(x...) printk(KERN_INFO "au1xpsc_pcm: " x) #ifdef PCM_DEBUG #define DBG MSG #else #define DBG(x...) do {} while (0) #endif struct au1xpsc_audio_dmadata { /* DDMA control data */ unsigned int ddma_id; /* DDMA direction ID for this PSC */ u32 ddma_chan; /* DDMA context */ /* PCM context (for irq handlers) */ struct snd_pcm_substream *substream; unsigned long curr_period; /* current segment DDMA is working on */ unsigned long q_period; /* queue period(s) */ dma_addr_t dma_area; /* address of queued DMA area */ dma_addr_t dma_area_s; /* start address of DMA area */ unsigned long pos; /* current byte position being played */ unsigned long periods; /* number of SG segments in total */ unsigned long period_bytes; /* size in bytes of one SG segment */ /* runtime data */ int msbits; }; /* * These settings are somewhat okay, at least on my machine audio plays * almost skip-free. Especially the 64kB buffer seems to help a LOT. */ #define AU1XPSC_PERIOD_MIN_BYTES 1024 #define AU1XPSC_BUFFER_MIN_BYTES 65536 /* PCM hardware DMA capabilities - platform specific */ static const struct snd_pcm_hardware au1xpsc_pcm_hardware = { .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BATCH, .period_bytes_min = AU1XPSC_PERIOD_MIN_BYTES, .period_bytes_max = 4096 * 1024 - 1, .periods_min = 2, .periods_max = 4096, /* 2 to as-much-as-you-like */ .buffer_bytes_max = 4096 * 1024 - 1, .fifo_size = 16, /* fifo entries of AC97/I2S PSC */ }; static void au1x_pcm_queue_tx(struct au1xpsc_audio_dmadata *cd) { au1xxx_dbdma_put_source(cd->ddma_chan, cd->dma_area, cd->period_bytes, DDMA_FLAGS_IE); /* update next-to-queue period */ ++cd->q_period; cd->dma_area += cd->period_bytes; if (cd->q_period >= cd->periods) { cd->q_period = 0; cd->dma_area = cd->dma_area_s; } } static void au1x_pcm_queue_rx(struct au1xpsc_audio_dmadata *cd) { au1xxx_dbdma_put_dest(cd->ddma_chan, cd->dma_area, cd->period_bytes, DDMA_FLAGS_IE); /* update next-to-queue period */ ++cd->q_period; cd->dma_area += cd->period_bytes; if (cd->q_period >= cd->periods) { cd->q_period = 0; cd->dma_area = cd->dma_area_s; } } static void au1x_pcm_dmatx_cb(int irq, void *dev_id) { struct au1xpsc_audio_dmadata *cd = dev_id; cd->pos += cd->period_bytes; if (++cd->curr_period >= cd->periods) { cd->pos = 0; cd->curr_period = 0; } snd_pcm_period_elapsed(cd->substream); au1x_pcm_queue_tx(cd); } static void au1x_pcm_dmarx_cb(int irq, void *dev_id) { struct au1xpsc_audio_dmadata *cd = dev_id; cd->pos += cd->period_bytes; if (++cd->curr_period >= cd->periods) { cd->pos = 0; cd->curr_period = 0; } snd_pcm_period_elapsed(cd->substream); au1x_pcm_queue_rx(cd); } static void au1x_pcm_dbdma_free(struct au1xpsc_audio_dmadata *pcd) { if (pcd->ddma_chan) { au1xxx_dbdma_stop(pcd->ddma_chan); au1xxx_dbdma_reset(pcd->ddma_chan); au1xxx_dbdma_chan_free(pcd->ddma_chan); pcd->ddma_chan = 0; pcd->msbits = 0; } } /* in case of missing DMA ring or changed TX-source / RX-dest bit widths, * allocate (or reallocate) a 2-descriptor DMA ring with bit depth according * to ALSA-supplied sample depth. This is due to limitations in the dbdma api * (cannot adjust source/dest widths of already allocated descriptor ring). */ static int au1x_pcm_dbdma_realloc(struct au1xpsc_audio_dmadata *pcd, int stype, int msbits) { /* DMA only in 8/16/32 bit widths */ if (msbits == 24) msbits = 32; /* check current config: correct bits and descriptors allocated? */ if ((pcd->ddma_chan) && (msbits == pcd->msbits)) goto out; /* all ok! */ au1x_pcm_dbdma_free(pcd); if (stype == SNDRV_PCM_STREAM_CAPTURE) pcd->ddma_chan = au1xxx_dbdma_chan_alloc(pcd->ddma_id, DSCR_CMD0_ALWAYS, au1x_pcm_dmarx_cb, (void *)pcd); else pcd->ddma_chan = au1xxx_dbdma_chan_alloc(DSCR_CMD0_ALWAYS, pcd->ddma_id, au1x_pcm_dmatx_cb, (void *)pcd); if (!pcd->ddma_chan) return -ENOMEM; au1xxx_dbdma_set_devwidth(pcd->ddma_chan, msbits); au1xxx_dbdma_ring_alloc(pcd->ddma_chan, 2); pcd->msbits = msbits; au1xxx_dbdma_stop(pcd->ddma_chan); au1xxx_dbdma_reset(pcd->ddma_chan); out: return 0; } static inline struct au1xpsc_audio_dmadata *to_dmadata(struct snd_pcm_substream *ss) { struct snd_soc_pcm_runtime *rtd = ss->private_data; struct au1xpsc_audio_dmadata *pcd = snd_soc_platform_get_drvdata(rtd->platform); return &pcd[ss->stream]; } static int au1xpsc_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_pcm_runtime *runtime = substream->runtime; struct au1xpsc_audio_dmadata *pcd; int stype, ret; ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); if (ret < 0) goto out; stype = substream->stream; pcd = to_dmadata(substream); DBG("runtime->dma_area = 0x%08lx dma_addr_t = 0x%08lx dma_size = %zu " "runtime->min_align %lu\n", (unsigned long)runtime->dma_area, (unsigned long)runtime->dma_addr, runtime->dma_bytes, runtime->min_align); DBG("bits %d frags %d frag_bytes %d is_rx %d\n", params->msbits, params_periods(params), params_period_bytes(params), stype); ret = au1x_pcm_dbdma_realloc(pcd, stype, params->msbits); if (ret) { MSG("DDMA channel (re)alloc failed!\n"); goto out; } pcd->substream = substream; pcd->period_bytes = params_period_bytes(params); pcd->periods = params_periods(params); pcd->dma_area_s = pcd->dma_area = runtime->dma_addr; pcd->q_period = 0; pcd->curr_period = 0; pcd->pos = 0; ret = 0; out: return ret; } static int au1xpsc_pcm_hw_free(struct snd_pcm_substream *substream) { snd_pcm_lib_free_pages(substream); return 0; } static int au1xpsc_pcm_prepare(struct snd_pcm_substream *substream) { struct au1xpsc_audio_dmadata *pcd = to_dmadata(substream); au1xxx_dbdma_reset(pcd->ddma_chan); if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { au1x_pcm_queue_rx(pcd); au1x_pcm_queue_rx(pcd); } else { au1x_pcm_queue_tx(pcd); au1x_pcm_queue_tx(pcd); } return 0; } static int au1xpsc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { u32 c = to_dmadata(substream)->ddma_chan; switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: au1xxx_dbdma_start(c); break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: au1xxx_dbdma_stop(c); break; default: return -EINVAL; } return 0; } static snd_pcm_uframes_t au1xpsc_pcm_pointer(struct snd_pcm_substream *substream) { return bytes_to_frames(substream->runtime, to_dmadata(substream)->pos); } static int au1xpsc_pcm_open(struct snd_pcm_substream *substream) { struct au1xpsc_audio_dmadata *pcd = to_dmadata(substream); struct snd_soc_pcm_runtime *rtd = substream->private_data; int stype = substream->stream, *dmaids; dmaids = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); if (!dmaids) return -ENODEV; /* whoa, has ordering changed? */ pcd->ddma_id = dmaids[stype]; snd_soc_set_runtime_hwparams(substream, &au1xpsc_pcm_hardware); return 0; } static int au1xpsc_pcm_close(struct snd_pcm_substream *substream) { au1x_pcm_dbdma_free(to_dmadata(substream)); return 0; } static struct snd_pcm_ops au1xpsc_pcm_ops = { .open = au1xpsc_pcm_open, .close = au1xpsc_pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = au1xpsc_pcm_hw_params, .hw_free = au1xpsc_pcm_hw_free, .prepare = au1xpsc_pcm_prepare, .trigger = au1xpsc_pcm_trigger, .pointer = au1xpsc_pcm_pointer, }; static int au1xpsc_pcm_new(struct snd_soc_pcm_runtime *rtd) { struct snd_card *card = rtd->card->snd_card; struct snd_pcm *pcm = rtd->pcm; snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, card->dev, AU1XPSC_BUFFER_MIN_BYTES, (4096 * 1024) - 1); return 0; } /* au1xpsc audio platform */ static struct snd_soc_platform_driver au1xpsc_soc_platform = { .ops = &au1xpsc_pcm_ops, .pcm_new = au1xpsc_pcm_new, }; static int au1xpsc_pcm_drvprobe(struct platform_device *pdev) { struct au1xpsc_audio_dmadata *dmadata; dmadata = devm_kzalloc(&pdev->dev, 2 * sizeof(struct au1xpsc_audio_dmadata), GFP_KERNEL); if (!dmadata) return -ENOMEM; platform_set_drvdata(pdev, dmadata); return devm_snd_soc_register_platform(&pdev->dev, &au1xpsc_soc_platform); } static struct platform_driver au1xpsc_pcm_driver = { .driver = { .name = "au1xpsc-pcm", }, .probe = au1xpsc_pcm_drvprobe, }; module_platform_driver(au1xpsc_pcm_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Au12x0/Au1550 PSC Audio DMA driver"); MODULE_AUTHOR("Manuel Lauss"); d> -rw-r--r--bpf-prologue.h847logplain -rw-r--r--build-id.c19054logplain -rw-r--r--build-id.h1859logplain d---------c++184logplain -rw-r--r--cache.h733logplain -rw-r--r--call-path.c2893logplain -rw-r--r--call-path.h2203logplain -rw-r--r--callchain.c29332logplain -rw-r--r--callchain.h7881logplain -rw-r--r--cgroup.c3195logplain -rw-r--r--cgroup.h359logplain -rw-r--r--cloexec.c1950logplain -rw-r--r--cloexec.h251logplain -rw-r--r--color.c4787logplain -rw-r--r--color.h1647logplain -rw-r--r--comm.c2239logplain -rw-r--r--comm.h561logplain -rw-r--r--config.c16262logplain -rw-r--r--config.h2113logplain -rw-r--r--counts.c1026logplain -rw-r--r--counts.h790logplain -rw-r--r--cpumap.c12627logplain -rw-r--r--cpumap.h1954logplain -rw-r--r--cs-etm.h2061logplain -rw-r--r--ctype.c2018logplain -rw-r--r--data-convert-bt.c36671logplain -rw-r--r--data-convert-bt.h302logplain -rw-r--r--data-convert.h141logplain -rw-r--r--data.c3459logplain -rw-r--r--data.h1369logplain -rw-r--r--db-export.c11434logplain -rw-r--r--db-export.h3816logplain -rw-r--r--debug.c4417logplain -rw-r--r--debug.h2023logplain -rw-r--r--demangle-java.c4219logplain -rw-r--r--demangle-java.h249logplain -rw-r--r--demangle-rust.c6602logplain -rw-r--r--demangle-rust.h170logplain -rw-r--r--drv_configs.c1834logplain -rw-r--r--drv_configs.h844logplain -rw-r--r--dso.c31994logplain -rw-r--r--dso.h10399logplain -rw-r--r--dwarf-aux.c33828logplain -rw-r--r--dwarf-aux.h5101logplain -rw-r--r--dwarf-regs.c1816logplain -rw-r--r--env.c1884logplain -rw-r--r--env.h1268logplain -rw-r--r--event.c36670logplain -rw-r--r--event.h15997logplain -rw-r--r--evlist.c47104logplain -rw-r--r--evlist.h12584logplain -rw-r--r--evsel.c63917logplain -rw-r--r--evsel.h13041logplain -rw-r--r--evsel_fprintf.c5831logplain -rw-r--r--find-vdso-map.c581logplain -rw-r--r--genelf.c11653logplain -rw-r--r--genelf.h1814logplain -rw-r--r--genelf_debug.c14374logplain -rwxr-xr-xgenerate-cmdlist.sh1141logplain -rw-r--r--group.h122logplain -rw-r--r--header.c73410logplain -rw-r--r--header.h4365logplain -rw-r--r--help-unknown-cmd.c3221logplain