1 // SPDX-License-Identifier: GPL-2.0
5 // Copyright (c) 2016-2018 Socionext Inc.
7 #include <linux/dma-mapping.h>
28 static void aiodma_pcm_irq(struct uniphier_aio_sub *sub)  in aiodma_pcm_irq()  argument
30 	struct snd_pcm_runtime *runtime = sub->substream->runtime;  in aiodma_pcm_irq()
31 	int bytes = runtime->period_size *  in aiodma_pcm_irq()
32 		runtime->channels * samples_to_bytes(runtime, 1);  in aiodma_pcm_irq()
35 	spin_lock(&sub->lock);  in aiodma_pcm_irq()
36 	ret = aiodma_rb_set_threshold(sub, runtime->dma_bytes,  in aiodma_pcm_irq()
37 				      sub->threshold + bytes);  in aiodma_pcm_irq()
39 		sub->threshold += bytes;  in aiodma_pcm_irq()
41 	aiodma_rb_sync(sub, runtime->dma_addr, runtime->dma_bytes, bytes);  in aiodma_pcm_irq()
42 	aiodma_rb_clear_irq(sub);  in aiodma_pcm_irq()
43 	spin_unlock(&sub->lock);  in aiodma_pcm_irq()
45 	snd_pcm_period_elapsed(sub->substream);  in aiodma_pcm_irq()
48 static void aiodma_compr_irq(struct uniphier_aio_sub *sub)  in aiodma_compr_irq()  argument
50 	struct snd_compr_runtime *runtime = sub->cstream->runtime;  in aiodma_compr_irq()
51 	int bytes = runtime->fragment_size;  in aiodma_compr_irq()
54 	spin_lock(&sub->lock);  in aiodma_compr_irq()
55 	ret = aiodma_rb_set_threshold(sub, sub->compr_bytes,  in aiodma_compr_irq()
56 				      sub->threshold + bytes);  in aiodma_compr_irq()
58 		sub->threshold += bytes;  in aiodma_compr_irq()
60 	aiodma_rb_sync(sub, sub->compr_addr, sub->compr_bytes, bytes);  in aiodma_compr_irq()
61 	aiodma_rb_clear_irq(sub);  in aiodma_compr_irq()
62 	spin_unlock(&sub->lock);  in aiodma_compr_irq()
64 	snd_compr_fragment_elapsed(sub->cstream);  in aiodma_compr_irq()
74 	for (i = 0; i < chip->num_aios; i++) {  in aiodma_irq()
75 		struct uniphier_aio *aio = &chip->aios[i];  in aiodma_irq()
77 		for (j = 0; j < ARRAY_SIZE(aio->sub); j++) {  in aiodma_irq()
78 			struct uniphier_aio_sub *sub = &aio->sub[j];  in aiodma_irq()  local
81 			if (!sub->running || !aiodma_rb_is_irq(sub))  in aiodma_irq()
84 			if (sub->substream)  in aiodma_irq()
85 				aiodma_pcm_irq(sub);  in aiodma_irq()
86 			if (sub->cstream)  in aiodma_irq()
87 				aiodma_compr_irq(sub);  in aiodma_irq()
99 	struct snd_pcm_runtime *runtime = substream->runtime;  in uniphier_aiodma_open()
110 	struct snd_pcm_runtime *runtime = substream->runtime;  in uniphier_aiodma_prepare()
113 	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];  in uniphier_aiodma_prepare()  local
114 	int bytes = runtime->period_size *  in uniphier_aiodma_prepare()
115 		runtime->channels * samples_to_bytes(runtime, 1);  in uniphier_aiodma_prepare()
119 	ret = aiodma_ch_set_param(sub);  in uniphier_aiodma_prepare()
123 	spin_lock_irqsave(&sub->lock, flags);  in uniphier_aiodma_prepare()
124 	ret = aiodma_rb_set_buffer(sub, runtime->dma_addr,  in uniphier_aiodma_prepare()
125 				   runtime->dma_addr + runtime->dma_bytes,  in uniphier_aiodma_prepare()
127 	spin_unlock_irqrestore(&sub->lock, flags);  in uniphier_aiodma_prepare()
137 	struct snd_pcm_runtime *runtime = substream->runtime;  in uniphier_aiodma_trigger()
140 	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];  in uniphier_aiodma_trigger()  local
141 	struct device *dev = &aio->chip->pdev->dev;  in uniphier_aiodma_trigger()
142 	int bytes = runtime->period_size *  in uniphier_aiodma_trigger()
143 		runtime->channels * samples_to_bytes(runtime, 1);  in uniphier_aiodma_trigger()
146 	spin_lock_irqsave(&sub->lock, flags);  in uniphier_aiodma_trigger()
149 		aiodma_rb_sync(sub, runtime->dma_addr, runtime->dma_bytes,  in uniphier_aiodma_trigger()
151 		aiodma_ch_set_enable(sub, 1);  in uniphier_aiodma_trigger()
152 		sub->running = 1;  in uniphier_aiodma_trigger()
156 		sub->running = 0;  in uniphier_aiodma_trigger()
157 		aiodma_ch_set_enable(sub, 0);  in uniphier_aiodma_trigger()
164 	spin_unlock_irqrestore(&sub->lock, flags);  in uniphier_aiodma_trigger()
173 	struct snd_pcm_runtime *runtime = substream->runtime;  in uniphier_aiodma_pointer()
176 	struct uniphier_aio_sub *sub = &aio->sub[substream->stream];  in uniphier_aiodma_pointer()  local
177 	int bytes = runtime->period_size *  in uniphier_aiodma_pointer()
178 		runtime->channels * samples_to_bytes(runtime, 1);  in uniphier_aiodma_pointer()
182 	spin_lock_irqsave(&sub->lock, flags);  in uniphier_aiodma_pointer()
183 	aiodma_rb_sync(sub, runtime->dma_addr, runtime->dma_bytes, bytes);  in uniphier_aiodma_pointer()
185 	if (sub->swm->dir == PORT_DIR_OUTPUT)  in uniphier_aiodma_pointer()
186 		pos = bytes_to_frames(runtime, sub->rd_offs);  in uniphier_aiodma_pointer()
188 		pos = bytes_to_frames(runtime, sub->wr_offs);  in uniphier_aiodma_pointer()
189 	spin_unlock_irqrestore(&sub->lock, flags);  in uniphier_aiodma_pointer()
198 	vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);  in uniphier_aiodma_mmap()
200 	return remap_pfn_range(vma, vma->vm_start,  in uniphier_aiodma_mmap()
201 			       substream->runtime->dma_addr >> PAGE_SHIFT,  in uniphier_aiodma_mmap()
202 			       vma->vm_end - vma->vm_start, vma->vm_page_prot);  in uniphier_aiodma_mmap()
208 	struct device *dev = rtd->card->snd_card->dev;  in uniphier_aiodma_new()
209 	struct snd_pcm *pcm = rtd->pcm;  in uniphier_aiodma_new()
242  * uniphier_aiodma_soc_register_platform - register the AIO DMA
246  * This function need to call once at driver startup and need NOT to call
247  * unregister function.
254 	struct device *dev = &pdev->dev;  in uniphier_aiodma_soc_register_platform()
262 	chip->regmap = devm_regmap_init_mmio(dev, preg,  in uniphier_aiodma_soc_register_platform()
264 	if (IS_ERR(chip->regmap))  in uniphier_aiodma_soc_register_platform()
265 		return PTR_ERR(chip->regmap);  in uniphier_aiodma_soc_register_platform()