g12a-toacodec.c

  1// SPDX-License-Identifier: GPL-2.0
  2//
  3// Copyright (c) 2020 BayLibre, SAS.
  4// Author: Jerome Brunet <jbrunet@baylibre.com>
  5
  6#include <linux/bitfield.h>
  7#include <linux/clk.h>
  8#include <linux/module.h>
  9#include <sound/pcm_params.h>
 10#include <linux/regmap.h>
 11#include <linux/regulator/consumer.h>
 12#include <linux/reset.h>
 13#include <sound/soc.h>
 14#include <sound/soc-dai.h>
 15
 16#include <dt-bindings/sound/meson-g12a-toacodec.h>
 17#include "axg-tdm.h"
 18#include "meson-codec-glue.h"
 19
 20#define G12A_TOACODEC_DRV_NAME "g12a-toacodec"
 21
 22#define TOACODEC_CTRL0			0x0
 23#define  CTRL0_ENABLE_SHIFT		31
 24#define  CTRL0_DAT_SEL_SM1_MSB		19
 25#define  CTRL0_DAT_SEL_SM1_LSB		18
 26#define  CTRL0_DAT_SEL_MSB		15
 27#define  CTRL0_DAT_SEL_LSB		14
 28#define  CTRL0_LANE_SEL_SM1		16
 29#define  CTRL0_LANE_SEL			12
 30#define  CTRL0_LRCLK_SEL_SM1_MSB	14
 31#define  CTRL0_LRCLK_SEL_SM1_LSB	12
 32#define  CTRL0_LRCLK_SEL_MSB		9
 33#define  CTRL0_LRCLK_SEL_LSB		8
 34#define  CTRL0_LRCLK_INV_SM1		BIT(10)
 35#define  CTRL0_BLK_CAP_INV_SM1		BIT(9)
 36#define  CTRL0_BLK_CAP_INV		BIT(7)
 37#define  CTRL0_BCLK_O_INV_SM1		BIT(8)
 38#define  CTRL0_BCLK_O_INV		BIT(6)
 39#define  CTRL0_BCLK_SEL_SM1_MSB		6
 40#define  CTRL0_BCLK_SEL_MSB		5
 41#define  CTRL0_BCLK_SEL_LSB		4
 42#define  CTRL0_MCLK_SEL			GENMASK(2, 0)
 43
 44#define TOACODEC_OUT_CHMAX		2
 45
 46struct g12a_toacodec {
 47	struct regmap_field *field_dat_sel;
 48	struct regmap_field *field_lrclk_sel;
 49	struct regmap_field *field_bclk_sel;
 50};
 51
 52struct g12a_toacodec_match_data {
 53	const struct snd_soc_component_driver *component_drv;
 54	struct reg_field field_dat_sel;
 55	struct reg_field field_lrclk_sel;
 56	struct reg_field field_bclk_sel;
 57};
 58
 59static const char * const g12a_toacodec_mux_texts[] = {
 60	"I2S A", "I2S B", "I2S C",
 61};
 62
 63static int g12a_toacodec_mux_put_enum(struct snd_kcontrol *kcontrol,
 64				      struct snd_ctl_elem_value *ucontrol)
 65{
 66	struct snd_soc_component *component = snd_soc_dapm_kcontrol_to_component(kcontrol);
 67	struct g12a_toacodec *priv = snd_soc_component_get_drvdata(component);
 68	struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_to_dapm(kcontrol);
 69	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
 70	unsigned int mux, reg;
 71
 72	if (ucontrol->value.enumerated.item[0] >= e->items)
 73		return -EINVAL;
 74
 75	mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
 76	regmap_field_read(priv->field_dat_sel, &reg);
 77
 78	if (mux == reg)
 79		return 0;
 80
 81	/* Force disconnect of the mux while updating */
 82	snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
 83
 84	regmap_field_write(priv->field_dat_sel, mux);
 85	regmap_field_write(priv->field_lrclk_sel, mux);
 86	regmap_field_write(priv->field_bclk_sel, mux);
 87
 88	/*
 89	 * FIXME:
 90	 * On this soc, the glue gets the MCLK directly from the clock
 91	 * controller instead of going the through the TDM interface.
 92	 *
 93	 * Here we assume interface A uses clock A, etc ... While it is
 94	 * true for now, it could be different. Instead the glue should
 95	 * find out the clock used by the interface and select the same
 96	 * source. For that, we will need regmap backed clock mux which
 97	 * is a work in progress
 98	 */
 99	snd_soc_component_update_bits(component, e->reg,
100				      CTRL0_MCLK_SEL,
101				      FIELD_PREP(CTRL0_MCLK_SEL, mux));
102
103	snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
104
105	return 1;
106}
107
108static SOC_ENUM_SINGLE_DECL(g12a_toacodec_mux_enum, TOACODEC_CTRL0,
109			    CTRL0_DAT_SEL_LSB,
110			    g12a_toacodec_mux_texts);
111
112static SOC_ENUM_SINGLE_DECL(sm1_toacodec_mux_enum, TOACODEC_CTRL0,
113			    CTRL0_DAT_SEL_SM1_LSB,
114			    g12a_toacodec_mux_texts);
115
116static const struct snd_kcontrol_new g12a_toacodec_mux =
117	SOC_DAPM_ENUM_EXT("Source", g12a_toacodec_mux_enum,
118			  snd_soc_dapm_get_enum_double,
119			  g12a_toacodec_mux_put_enum);
120
121static const struct snd_kcontrol_new sm1_toacodec_mux =
122	SOC_DAPM_ENUM_EXT("Source", sm1_toacodec_mux_enum,
123			  snd_soc_dapm_get_enum_double,
124			  g12a_toacodec_mux_put_enum);
125
126static const struct snd_kcontrol_new g12a_toacodec_out_enable =
127	SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOACODEC_CTRL0,
128				    CTRL0_ENABLE_SHIFT, 1, 0);
129
130static const struct snd_soc_dapm_widget g12a_toacodec_widgets[] = {
131	SND_SOC_DAPM_MUX("SRC", SND_SOC_NOPM, 0, 0,
132			 &g12a_toacodec_mux),
133	SND_SOC_DAPM_SWITCH("OUT EN", SND_SOC_NOPM, 0, 0,
134			    &g12a_toacodec_out_enable),
135};
136
137static const struct snd_soc_dapm_widget sm1_toacodec_widgets[] = {
138	SND_SOC_DAPM_MUX("SRC", SND_SOC_NOPM, 0, 0,
139			 &sm1_toacodec_mux),
140	SND_SOC_DAPM_SWITCH("OUT EN", SND_SOC_NOPM, 0, 0,
141			    &g12a_toacodec_out_enable),
142};
143
144static int g12a_toacodec_input_hw_params(struct snd_pcm_substream *substream,
145					 struct snd_pcm_hw_params *params,
146					 struct snd_soc_dai *dai)
147{
148	struct meson_codec_glue_input *data;
149	int ret;
150
151	ret = meson_codec_glue_input_hw_params(substream, params, dai);
152	if (ret)
153		return ret;
154
155	/* The glue will provide 1 lane out of the 4 to the output */
156	data = meson_codec_glue_input_get_data(dai);
157	data->params.channels_min = min_t(unsigned int, TOACODEC_OUT_CHMAX,
158					data->params.channels_min);
159	data->params.channels_max = min_t(unsigned int, TOACODEC_OUT_CHMAX,
160					data->params.channels_max);
161
162	return 0;
163}
164
165static const struct snd_soc_dai_ops g12a_toacodec_input_ops = {
166	.probe		= meson_codec_glue_input_dai_probe,
167	.remove		= meson_codec_glue_input_dai_remove,
168	.hw_params	= g12a_toacodec_input_hw_params,
169	.set_fmt	= meson_codec_glue_input_set_fmt,
170};
171
172static const struct snd_soc_dai_ops g12a_toacodec_output_ops = {
173	.startup	= meson_codec_glue_output_startup,
174};
175
176#define TOACODEC_STREAM(xname, xsuffix, xchmax)			\
177{								\
178	.stream_name	= xname " " xsuffix,			\
179	.channels_min	= 1,					\
180	.channels_max	= (xchmax),				\
181	.rate_min       = 5512,					\
182	.rate_max	= 192000,				\
183	.formats	= AXG_TDM_FORMATS,			\
184}
185
186#define TOACODEC_INPUT(xname, xid) {					\
187	.name = xname,							\
188	.id = (xid),							\
189	.playback = TOACODEC_STREAM(xname, "Playback", 8),		\
190	.ops = &g12a_toacodec_input_ops,				\
191}
192
193#define TOACODEC_OUTPUT(xname, xid) {					\
194	.name = xname,							\
195	.id = (xid),							\
196	.capture = TOACODEC_STREAM(xname, "Capture", TOACODEC_OUT_CHMAX), \
197	.ops = &g12a_toacodec_output_ops,				\
198}
199
200static struct snd_soc_dai_driver g12a_toacodec_dai_drv[] = {
201	TOACODEC_INPUT("IN A", TOACODEC_IN_A),
202	TOACODEC_INPUT("IN B", TOACODEC_IN_B),
203	TOACODEC_INPUT("IN C", TOACODEC_IN_C),
204	TOACODEC_OUTPUT("OUT", TOACODEC_OUT),
205};
206
207static int g12a_toacodec_component_probe(struct snd_soc_component *c)
208{
209	/* Initialize the static clock parameters */
210	return snd_soc_component_write(c, TOACODEC_CTRL0,
211				       CTRL0_BLK_CAP_INV);
212}
213
214static int sm1_toacodec_component_probe(struct snd_soc_component *c)
215{
216	/* Initialize the static clock parameters */
217	return snd_soc_component_write(c, TOACODEC_CTRL0,
218				       CTRL0_BLK_CAP_INV_SM1);
219}
220
221static const struct snd_soc_dapm_route g12a_toacodec_routes[] = {
222	{ "SRC", "I2S A", "IN A Playback" },
223	{ "SRC", "I2S B", "IN B Playback" },
224	{ "SRC", "I2S C", "IN C Playback" },
225	{ "OUT EN", "Switch", "SRC" },
226	{ "OUT Capture", NULL, "OUT EN" },
227};
228
229static const struct snd_kcontrol_new g12a_toacodec_controls[] = {
230	SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL, 3, 0),
231};
232
233static const struct snd_kcontrol_new sm1_toacodec_controls[] = {
234	SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL_SM1, 3, 0),
235};
236
237static const struct snd_soc_component_driver g12a_toacodec_component_drv = {
238	.probe			= g12a_toacodec_component_probe,
239	.controls		= g12a_toacodec_controls,
240	.num_controls		= ARRAY_SIZE(g12a_toacodec_controls),
241	.dapm_widgets		= g12a_toacodec_widgets,
242	.num_dapm_widgets	= ARRAY_SIZE(g12a_toacodec_widgets),
243	.dapm_routes		= g12a_toacodec_routes,
244	.num_dapm_routes	= ARRAY_SIZE(g12a_toacodec_routes),
245	.endianness		= 1,
246};
247
248static const struct snd_soc_component_driver sm1_toacodec_component_drv = {
249	.probe			= sm1_toacodec_component_probe,
250	.controls		= sm1_toacodec_controls,
251	.num_controls		= ARRAY_SIZE(sm1_toacodec_controls),
252	.dapm_widgets		= sm1_toacodec_widgets,
253	.num_dapm_widgets	= ARRAY_SIZE(sm1_toacodec_widgets),
254	.dapm_routes		= g12a_toacodec_routes,
255	.num_dapm_routes	= ARRAY_SIZE(g12a_toacodec_routes),
256	.endianness		= 1,
257};
258
259static const struct regmap_config g12a_toacodec_regmap_cfg = {
260	.reg_bits	= 32,
261	.val_bits	= 32,
262	.reg_stride	= 4,
263};
264
265static const struct g12a_toacodec_match_data g12a_toacodec_match_data = {
266	.component_drv	= &g12a_toacodec_component_drv,
267	.field_dat_sel	= REG_FIELD(TOACODEC_CTRL0, 14, 15),
268	.field_lrclk_sel = REG_FIELD(TOACODEC_CTRL0, 8, 9),
269	.field_bclk_sel	= REG_FIELD(TOACODEC_CTRL0, 4, 5),
270};
271
272static const struct g12a_toacodec_match_data sm1_toacodec_match_data = {
273	.component_drv	= &sm1_toacodec_component_drv,
274	.field_dat_sel	= REG_FIELD(TOACODEC_CTRL0, 18, 19),
275	.field_lrclk_sel = REG_FIELD(TOACODEC_CTRL0, 12, 14),
276	.field_bclk_sel	= REG_FIELD(TOACODEC_CTRL0, 4, 6),
277};
278
279static const struct of_device_id g12a_toacodec_of_match[] = {
280	{
281		.compatible = "amlogic,g12a-toacodec",
282		.data = &g12a_toacodec_match_data,
283	},
284	{
285		.compatible = "amlogic,sm1-toacodec",
286		.data = &sm1_toacodec_match_data,
287	},
288	{}
289};
290MODULE_DEVICE_TABLE(of, g12a_toacodec_of_match);
291
292static int g12a_toacodec_probe(struct platform_device *pdev)
293{
294	const struct g12a_toacodec_match_data *data;
295	struct device *dev = &pdev->dev;
296	struct g12a_toacodec *priv;
297	void __iomem *regs;
298	struct regmap *map;
299	int ret;
300
301	data = device_get_match_data(dev);
302	if (!data) {
303		dev_err(dev, "failed to match device\n");
304		return -ENODEV;
305	}
306
307	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
308	if (!priv)
309		return -ENOMEM;
310
311	platform_set_drvdata(pdev, priv);
312
313	ret = device_reset(dev);
314	if (ret)
315		return ret;
316
317	regs = devm_platform_ioremap_resource(pdev, 0);
318	if (IS_ERR(regs))
319		return PTR_ERR(regs);
320
321	map = devm_regmap_init_mmio(dev, regs, &g12a_toacodec_regmap_cfg);
322	if (IS_ERR(map)) {
323		dev_err(dev, "failed to init regmap: %ld\n",
324			PTR_ERR(map));
325		return PTR_ERR(map);
326	}
327
328	priv->field_dat_sel = devm_regmap_field_alloc(dev, map, data->field_dat_sel);
329	if (IS_ERR(priv->field_dat_sel))
330		return PTR_ERR(priv->field_dat_sel);
331
332	priv->field_lrclk_sel = devm_regmap_field_alloc(dev, map, data->field_lrclk_sel);
333	if (IS_ERR(priv->field_lrclk_sel))
334		return PTR_ERR(priv->field_lrclk_sel);
335
336	priv->field_bclk_sel = devm_regmap_field_alloc(dev, map, data->field_bclk_sel);
337	if (IS_ERR(priv->field_bclk_sel))
338		return PTR_ERR(priv->field_bclk_sel);
339
340	return devm_snd_soc_register_component(dev,
341			data->component_drv, g12a_toacodec_dai_drv,
342			ARRAY_SIZE(g12a_toacodec_dai_drv));
343}
344
345static struct platform_driver g12a_toacodec_pdrv = {
346	.driver = {
347		.name = G12A_TOACODEC_DRV_NAME,
348		.of_match_table = g12a_toacodec_of_match,
349	},
350	.probe = g12a_toacodec_probe,
351};
352module_platform_driver(g12a_toacodec_pdrv);
353
354MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
355MODULE_DESCRIPTION("Amlogic G12a To Internal DAC Codec Driver");
356MODULE_LICENSE("GPL v2");