2  * tegra20_i2s.c - Tegra20 I2S driver
48 #define DRV_NAME "tegra20-i2s"
52 	struct tegra20_i2s *i2s = dev_get_drvdata(dev);  in tegra20_i2s_runtime_suspend()  local
54 	clk_disable_unprepare(i2s->clk_i2s);  in tegra20_i2s_runtime_suspend()
61 	struct tegra20_i2s *i2s = dev_get_drvdata(dev);  in tegra20_i2s_runtime_resume()  local
64 	ret = clk_prepare_enable(i2s->clk_i2s);  in tegra20_i2s_runtime_resume()
76 	struct tegra20_i2s *i2s = snd_soc_dai_get_drvdata(dai);  in tegra20_i2s_set_fmt()  local
124 	regmap_update_bits(i2s->regmap, TEGRA20_I2S_CTRL, mask, val);  in tegra20_i2s_set_fmt()
134 	struct tegra20_i2s *i2s = snd_soc_dai_get_drvdata(dai);  in tegra20_i2s_hw_params()  local
159 	regmap_update_bits(i2s->regmap, TEGRA20_I2S_CTRL, mask, val);  in tegra20_i2s_hw_params()
166 	ret = clk_set_rate(i2s->clk_i2s, i2sclock);  in tegra20_i2s_hw_params()
168 		dev_err(dev, "Can't set I2S clock rate: %d\n", ret);  in tegra20_i2s_hw_params()
180 	regmap_write(i2s->regmap, TEGRA20_I2S_TIMING, val);  in tegra20_i2s_hw_params()
182 	regmap_write(i2s->regmap, TEGRA20_I2S_FIFO_SCR,  in tegra20_i2s_hw_params()
189 static void tegra20_i2s_start_playback(struct tegra20_i2s *i2s)  in tegra20_i2s_start_playback()  argument
191 	regmap_update_bits(i2s->regmap, TEGRA20_I2S_CTRL,  in tegra20_i2s_start_playback()
196 static void tegra20_i2s_stop_playback(struct tegra20_i2s *i2s)  in tegra20_i2s_stop_playback()  argument
198 	regmap_update_bits(i2s->regmap, TEGRA20_I2S_CTRL,  in tegra20_i2s_stop_playback()
202 static void tegra20_i2s_start_capture(struct tegra20_i2s *i2s)  in tegra20_i2s_start_capture()  argument
204 	regmap_update_bits(i2s->regmap, TEGRA20_I2S_CTRL,  in tegra20_i2s_start_capture()
209 static void tegra20_i2s_stop_capture(struct tegra20_i2s *i2s)  in tegra20_i2s_stop_capture()  argument
211 	regmap_update_bits(i2s->regmap, TEGRA20_I2S_CTRL,  in tegra20_i2s_stop_capture()
218 	struct tegra20_i2s *i2s = snd_soc_dai_get_drvdata(dai);  in tegra20_i2s_trigger()  local
225 			tegra20_i2s_start_playback(i2s);  in tegra20_i2s_trigger()
227 			tegra20_i2s_start_capture(i2s);  in tegra20_i2s_trigger()
233 			tegra20_i2s_stop_playback(i2s);  in tegra20_i2s_trigger()
235 			tegra20_i2s_stop_capture(i2s);  in tegra20_i2s_trigger()
246 	struct tegra20_i2s *i2s = snd_soc_dai_get_drvdata(dai);  in tegra20_i2s_probe()  local
248 	dai->capture_dma_data = &i2s->capture_dma_data;  in tegra20_i2s_probe()
249 	dai->playback_dma_data = &i2s->playback_dma_data;  in tegra20_i2s_probe()
341 	struct tegra20_i2s *i2s;  in tegra20_i2s_platform_probe()  local
346 	i2s = devm_kzalloc(&pdev->dev, sizeof(struct tegra20_i2s), GFP_KERNEL);  in tegra20_i2s_platform_probe()
347 	if (!i2s) {  in tegra20_i2s_platform_probe()
351 	dev_set_drvdata(&pdev->dev, i2s);  in tegra20_i2s_platform_probe()
353 	i2s->dai = tegra20_i2s_dai_template;  in tegra20_i2s_platform_probe()
354 	i2s->dai.name = dev_name(&pdev->dev);  in tegra20_i2s_platform_probe()
356 	i2s->clk_i2s = clk_get(&pdev->dev, NULL);  in tegra20_i2s_platform_probe()
357 	if (IS_ERR(i2s->clk_i2s)) {  in tegra20_i2s_platform_probe()
358 		dev_err(&pdev->dev, "Can't retrieve i2s clock\n");  in tegra20_i2s_platform_probe()
359 		ret = PTR_ERR(i2s->clk_i2s);  in tegra20_i2s_platform_probe()
370 	i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,  in tegra20_i2s_platform_probe()
372 	if (IS_ERR(i2s->regmap)) {  in tegra20_i2s_platform_probe()
374 		ret = PTR_ERR(i2s->regmap);  in tegra20_i2s_platform_probe()
378 	i2s->capture_dma_data.addr = mem->start + TEGRA20_I2S_FIFO2;  in tegra20_i2s_platform_probe()
379 	i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in tegra20_i2s_platform_probe()
380 	i2s->capture_dma_data.maxburst = 4;  in tegra20_i2s_platform_probe()
382 	i2s->playback_dma_data.addr = mem->start + TEGRA20_I2S_FIFO1;  in tegra20_i2s_platform_probe()
383 	i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in tegra20_i2s_platform_probe()
384 	i2s->playback_dma_data.maxburst = 4;  in tegra20_i2s_platform_probe()
394 					 &i2s->dai, 1);  in tegra20_i2s_platform_probe()
417 	clk_put(i2s->clk_i2s);  in tegra20_i2s_platform_probe()
424 	struct tegra20_i2s *i2s = dev_get_drvdata(&pdev->dev);  in tegra20_i2s_platform_remove()  local
433 	clk_put(i2s->clk_i2s);  in tegra20_i2s_platform_remove()
439 	{ .compatible = "nvidia,tegra20-i2s", },
460 MODULE_DESCRIPTION("Tegra20 I2S ASoC driver");