1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 2005-2009 Atmel Corporation
36 	struct clk			*pclk;  member
57 #define get_chip(card) ((struct atmel_ac97c *)(card)->private_data)
60 	__raw_writel((val), (chip)->regs + AC97C_##reg)
62 	__raw_readl((chip)->regs + AC97C_##reg)
89 	struct snd_pcm_runtime *runtime = substream->runtime;  in atmel_ac97c_playback_open()
92 	chip->opened++;  in atmel_ac97c_playback_open()
93 	runtime->hw = atmel_ac97c_hw;  in atmel_ac97c_playback_open()
94 	if (chip->cur_rate) {  in atmel_ac97c_playback_open()
95 		runtime->hw.rate_min = chip->cur_rate;  in atmel_ac97c_playback_open()
96 		runtime->hw.rate_max = chip->cur_rate;  in atmel_ac97c_playback_open()
98 	if (chip->cur_format)  in atmel_ac97c_playback_open()
99 		runtime->hw.formats = pcm_format_to_bits(chip->cur_format);  in atmel_ac97c_playback_open()
101 	chip->playback_substream = substream;  in atmel_ac97c_playback_open()
108 	struct snd_pcm_runtime *runtime = substream->runtime;  in atmel_ac97c_capture_open()
111 	chip->opened++;  in atmel_ac97c_capture_open()
112 	runtime->hw = atmel_ac97c_hw;  in atmel_ac97c_capture_open()
113 	if (chip->cur_rate) {  in atmel_ac97c_capture_open()
114 		runtime->hw.rate_min = chip->cur_rate;  in atmel_ac97c_capture_open()
115 		runtime->hw.rate_max = chip->cur_rate;  in atmel_ac97c_capture_open()
117 	if (chip->cur_format)  in atmel_ac97c_capture_open()
118 		runtime->hw.formats = pcm_format_to_bits(chip->cur_format);  in atmel_ac97c_capture_open()
120 	chip->capture_substream = substream;  in atmel_ac97c_capture_open()
129 	chip->opened--;  in atmel_ac97c_playback_close()
130 	if (!chip->opened) {  in atmel_ac97c_playback_close()
131 		chip->cur_rate = 0;  in atmel_ac97c_playback_close()
132 		chip->cur_format = 0;  in atmel_ac97c_playback_close()
136 	chip->playback_substream = NULL;  in atmel_ac97c_playback_close()
146 	chip->opened--;  in atmel_ac97c_capture_close()
147 	if (!chip->opened) {  in atmel_ac97c_capture_close()
148 		chip->cur_rate = 0;  in atmel_ac97c_capture_close()
149 		chip->cur_format = 0;  in atmel_ac97c_capture_close()
153 	chip->capture_substream = NULL;  in atmel_ac97c_capture_close()
165 	chip->cur_rate = params_rate(hw_params);  in atmel_ac97c_playback_hw_params()
166 	chip->cur_format = params_format(hw_params);  in atmel_ac97c_playback_hw_params()
179 	chip->cur_rate = params_rate(hw_params);  in atmel_ac97c_capture_hw_params()
180 	chip->cur_format = params_format(hw_params);  in atmel_ac97c_capture_hw_params()
189 	struct snd_pcm_runtime *runtime = substream->runtime;  in atmel_ac97c_playback_prepare()
190 	int block_size = frames_to_bytes(runtime, runtime->period_size);  in atmel_ac97c_playback_prepare()
194 	chip->playback_period = 0;  in atmel_ac97c_playback_prepare()
198 	switch (runtime->channels) {  in atmel_ac97c_playback_prepare()
208 		return -EINVAL;  in atmel_ac97c_playback_prepare()
212 	/* configure sample format and size */  in atmel_ac97c_playback_prepare()
214 	if (chip->opened <= 1)  in atmel_ac97c_playback_prepare()
219 	switch (runtime->format) {  in atmel_ac97c_playback_prepare()
229 		return -EINVAL;  in atmel_ac97c_playback_prepare()
243 	if (runtime->rate != 48000) {  in atmel_ac97c_playback_prepare()
253 	retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE,  in atmel_ac97c_playback_prepare()
254 			runtime->rate);  in atmel_ac97c_playback_prepare()
256 		dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n",  in atmel_ac97c_playback_prepare()
257 				runtime->rate);  in atmel_ac97c_playback_prepare()
260 	writel(runtime->dma_addr, chip->regs + ATMEL_PDC_TPR);  in atmel_ac97c_playback_prepare()
261 	writel(block_size / 2, chip->regs + ATMEL_PDC_TCR);  in atmel_ac97c_playback_prepare()
262 	writel(runtime->dma_addr + block_size, chip->regs + ATMEL_PDC_TNPR);  in atmel_ac97c_playback_prepare()
263 	writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR);  in atmel_ac97c_playback_prepare()
271 	struct snd_pcm_runtime *runtime = substream->runtime;  in atmel_ac97c_capture_prepare()
272 	int block_size = frames_to_bytes(runtime, runtime->period_size);  in atmel_ac97c_capture_prepare()
276 	chip->capture_period = 0;  in atmel_ac97c_capture_prepare()
280 	switch (runtime->channels) {  in atmel_ac97c_capture_prepare()
290 		return -EINVAL;  in atmel_ac97c_capture_prepare()
294 	/* configure sample format and size */  in atmel_ac97c_capture_prepare()
296 	if (chip->opened <= 1)  in atmel_ac97c_capture_prepare()
301 	switch (runtime->format) {  in atmel_ac97c_capture_prepare()
311 		return -EINVAL;  in atmel_ac97c_capture_prepare()
325 	if (runtime->rate != 48000) {  in atmel_ac97c_capture_prepare()
335 	retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE,  in atmel_ac97c_capture_prepare()
336 			runtime->rate);  in atmel_ac97c_capture_prepare()
338 		dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n",  in atmel_ac97c_capture_prepare()
339 				runtime->rate);  in atmel_ac97c_capture_prepare()
342 	writel(runtime->dma_addr, chip->regs + ATMEL_PDC_RPR);  in atmel_ac97c_capture_prepare()
343 	writel(block_size / 2, chip->regs + ATMEL_PDC_RCR);  in atmel_ac97c_capture_prepare()
344 	writel(runtime->dma_addr + block_size, chip->regs + ATMEL_PDC_RNPR);  in atmel_ac97c_capture_prepare()
345 	writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR);  in atmel_ac97c_capture_prepare()
369 		if (chip->opened <= 1)  in atmel_ac97c_playback_trigger()
373 		return -EINVAL;  in atmel_ac97c_playback_trigger()
377 	writel(ptcr, chip->regs + ATMEL_PDC_PTCR);  in atmel_ac97c_playback_trigger()
388 	ptcr = readl(chip->regs + ATMEL_PDC_PTSR);  in atmel_ac97c_capture_trigger()
401 		if (chip->opened <= 1)  in atmel_ac97c_capture_trigger()
405 		return -EINVAL;  in atmel_ac97c_capture_trigger()
409 	writel(ptcr, chip->regs + ATMEL_PDC_PTCR);  in atmel_ac97c_capture_trigger()
417 	struct snd_pcm_runtime	*runtime = substream->runtime;  in atmel_ac97c_playback_pointer()
421 	bytes = readl(chip->regs + ATMEL_PDC_TPR);  in atmel_ac97c_playback_pointer()
422 	bytes -= runtime->dma_addr;  in atmel_ac97c_playback_pointer()
425 	if (frames >= runtime->buffer_size)  in atmel_ac97c_playback_pointer()
426 		frames -= runtime->buffer_size;  in atmel_ac97c_playback_pointer()
434 	struct snd_pcm_runtime	*runtime = substream->runtime;  in atmel_ac97c_capture_pointer()
438 	bytes = readl(chip->regs + ATMEL_PDC_RPR);  in atmel_ac97c_capture_pointer()
439 	bytes -= runtime->dma_addr;  in atmel_ac97c_capture_pointer()
442 	if (frames >= runtime->buffer_size)  in atmel_ac97c_capture_pointer()
443 		frames -= runtime->buffer_size;  in atmel_ac97c_capture_pointer()
477 		dev_dbg(&chip->pdev->dev, "channel A event%s%s%s%s%s%s\n",  in atmel_ac97c_interrupt()
485 			runtime = chip->playback_substream->runtime;  in atmel_ac97c_interrupt()
486 			block_size = frames_to_bytes(runtime, runtime->period_size);  in atmel_ac97c_interrupt()
487 			chip->playback_period++;  in atmel_ac97c_interrupt()
489 			if (chip->playback_period == runtime->periods)  in atmel_ac97c_interrupt()
490 				chip->playback_period = 0;  in atmel_ac97c_interrupt()
491 			next_period = chip->playback_period + 1;  in atmel_ac97c_interrupt()
492 			if (next_period == runtime->periods)  in atmel_ac97c_interrupt()
497 			writel(runtime->dma_addr + offset, chip->regs + ATMEL_PDC_TNPR);  in atmel_ac97c_interrupt()
498 			writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR);  in atmel_ac97c_interrupt()
500 			snd_pcm_period_elapsed(chip->playback_substream);  in atmel_ac97c_interrupt()
503 			runtime = chip->capture_substream->runtime;  in atmel_ac97c_interrupt()
504 			block_size = frames_to_bytes(runtime, runtime->period_size);  in atmel_ac97c_interrupt()
505 			chip->capture_period++;  in atmel_ac97c_interrupt()
507 			if (chip->capture_period == runtime->periods)  in atmel_ac97c_interrupt()
508 				chip->capture_period = 0;  in atmel_ac97c_interrupt()
509 			next_period = chip->capture_period + 1;  in atmel_ac97c_interrupt()
510 			if (next_period == runtime->periods)  in atmel_ac97c_interrupt()
515 			writel(runtime->dma_addr + offset, chip->regs + ATMEL_PDC_RNPR);  in atmel_ac97c_interrupt()
516 			writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR);  in atmel_ac97c_interrupt()
517 			snd_pcm_period_elapsed(chip->capture_substream);  in atmel_ac97c_interrupt()
523 		dev_info(&chip->pdev->dev, "codec channel event%s%s%s%s%s\n",  in atmel_ac97c_interrupt()
533 		dev_err(&chip->pdev->dev, "spurious interrupt sr 0x%08x "  in atmel_ac97c_interrupt()
574 	retval = snd_ac97_pcm_assign(chip->ac97_bus,  in atmel_ac97c_pcm_new()
580 	retval = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);  in atmel_ac97c_pcm_new()
588 			&chip->pdev->dev, hw.periods_min * hw.period_bytes_min,  in atmel_ac97c_pcm_new()
591 	pcm->private_data = chip;  in atmel_ac97c_pcm_new()
592 	pcm->info_flags = 0;  in atmel_ac97c_pcm_new()
593 	strcpy(pcm->name, chip->card->shortname);  in atmel_ac97c_pcm_new()
594 	chip->pcm = pcm;  in atmel_ac97c_pcm_new()
604 	return snd_ac97_mixer(chip->ac97_bus, &template, &chip->ac97);  in atmel_ac97c_mixer_new()
622 	} while (--timeout);  in atmel_ac97c_write()
624 	dev_dbg(&chip->pdev->dev, "codec write timeout\n");  in atmel_ac97c_write()
649 	} while (--timeout);  in atmel_ac97c_read()
651 	if (!--write)  in atmel_ac97c_read()
662 	} while (--timeout);  in atmel_ac97c_read()
664 	if (!--write)  in atmel_ac97c_read()
669 	dev_dbg(&chip->pdev->dev, "codec read timeout\n");  in atmel_ac97c_read()
680 	if (!IS_ERR(chip->reset_pin)) {  in atmel_ac97c_reset()
681 		gpiod_set_value(chip->reset_pin, 0);  in atmel_ac97c_reset()
684 		gpiod_set_value(chip->reset_pin, 1);  in atmel_ac97c_reset()
693 	{ .compatible = "atmel,at91sam9263-ac97c", },
700 	struct device			*dev = &pdev->dev;  in atmel_ac97c_probe()
704 	struct clk			*pclk;  in atmel_ac97c_probe()  local
714 		dev_dbg(&pdev->dev, "no memory resource\n");  in atmel_ac97c_probe()
715 		return -ENXIO;  in atmel_ac97c_probe()
720 		dev_dbg(&pdev->dev, "could not get irq: %d\n", irq);  in atmel_ac97c_probe()
724 	pclk = clk_get(&pdev->dev, "ac97_clk");  in atmel_ac97c_probe()
725 	if (IS_ERR(pclk)) {  in atmel_ac97c_probe()
726 		dev_dbg(&pdev->dev, "no peripheral clock\n");  in atmel_ac97c_probe()
727 		return PTR_ERR(pclk);  in atmel_ac97c_probe()
729 	retval = clk_prepare_enable(pclk);  in atmel_ac97c_probe()
733 	retval = snd_card_new(&pdev->dev, SNDRV_DEFAULT_IDX1,  in atmel_ac97c_probe()
737 		dev_dbg(&pdev->dev, "could not create sound card device\n");  in atmel_ac97c_probe()
745 		dev_dbg(&pdev->dev, "unable to request irq %d\n", irq);  in atmel_ac97c_probe()
748 	chip->irq = irq;  in atmel_ac97c_probe()
750 	spin_lock_init(&chip->lock);  in atmel_ac97c_probe()
752 	strcpy(card->driver, "Atmel AC97C");  in atmel_ac97c_probe()
753 	strcpy(card->shortname, "Atmel AC97C");  in atmel_ac97c_probe()
754 	sprintf(card->longname, "Atmel AC97 controller");  in atmel_ac97c_probe()
756 	chip->card = card;  in atmel_ac97c_probe()
757 	chip->pclk = pclk;  in atmel_ac97c_probe()
758 	chip->pdev = pdev;  in atmel_ac97c_probe()
759 	chip->regs = ioremap(regs->start, resource_size(regs));  in atmel_ac97c_probe()
761 	if (!chip->regs) {  in atmel_ac97c_probe()
762 		dev_dbg(&pdev->dev, "could not remap register memory\n");  in atmel_ac97c_probe()
763 		retval = -ENOMEM;  in atmel_ac97c_probe()
767 	chip->reset_pin = devm_gpiod_get_index(dev, "ac97", 2, GPIOD_OUT_HIGH);  in atmel_ac97c_probe()
768 	if (IS_ERR(chip->reset_pin))  in atmel_ac97c_probe()
777 	retval = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus);  in atmel_ac97c_probe()
779 		dev_dbg(&pdev->dev, "could not register on ac97 bus\n");  in atmel_ac97c_probe()
785 		dev_dbg(&pdev->dev, "could not register ac97 mixer\n");  in atmel_ac97c_probe()
791 		dev_dbg(&pdev->dev, "could not register ac97 pcm device\n");  in atmel_ac97c_probe()
797 		dev_dbg(&pdev->dev, "could not register sound card\n");  in atmel_ac97c_probe()
803 	dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p, irq = %d\n",  in atmel_ac97c_probe()
804 			chip->regs, irq);  in atmel_ac97c_probe()
809 	iounmap(chip->regs);  in atmel_ac97c_probe()
815 	clk_disable_unprepare(pclk);  in atmel_ac97c_probe()
817 	clk_put(pclk);  in atmel_ac97c_probe()
825 	struct atmel_ac97c *chip = card->private_data;  in atmel_ac97c_suspend()
827 	clk_disable_unprepare(chip->pclk);  in atmel_ac97c_suspend()
834 	struct atmel_ac97c *chip = card->private_data;  in atmel_ac97c_resume()
835 	int ret = clk_prepare_enable(chip->pclk);  in atmel_ac97c_resume()
855 	clk_disable_unprepare(chip->pclk);  in atmel_ac97c_remove()
856 	clk_put(chip->pclk);  in atmel_ac97c_remove()
857 	iounmap(chip->regs);  in atmel_ac97c_remove()
858 	free_irq(chip->irq, chip);  in atmel_ac97c_remove()
878 MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");