1 // SPDX-License-Identifier: GPL-2.0
3 * McBSP Sidetone support
5 * Copyright (C) 2004 Nokia Corporation
6 * Author: Samuel Ortiz <samuel.ortiz@nokia.com>
8 * Contact: Jarkko Nikula <jarkko.nikula@bitmer.com>
9 * Peter Ujfalusi <peter.ujfalusi@ti.com>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/device.h>
15 #include <linux/platform_device.h>
16 #include <linux/interrupt.h>
17 #include <linux/err.h>
18 #include <linux/clk.h>
19 #include <linux/delay.h>
21 #include <linux/slab.h>
23 #include "omap-mcbsp.h"
24 #include "omap-mcbsp-priv.h"
26 /* OMAP3 sidetone control registers */
27 #define OMAP_ST_REG_REV 0x00
28 #define OMAP_ST_REG_SYSCONFIG 0x10
29 #define OMAP_ST_REG_IRQSTATUS 0x18
30 #define OMAP_ST_REG_IRQENABLE 0x1C
31 #define OMAP_ST_REG_SGAINCR 0x24
32 #define OMAP_ST_REG_SFIRCR 0x28
33 #define OMAP_ST_REG_SSELCR 0x2C
35 /********************** McBSP SSELCR bit definitions ***********************/
36 #define SIDETONEEN BIT(10)
38 /********************** McBSP Sidetone SYSCONFIG bit definitions ***********/
39 #define ST_AUTOIDLE BIT(0)
41 /********************** McBSP Sidetone SGAINCR bit definitions *************/
42 #define ST_CH0GAIN(value) ((value) & 0xffff) /* Bits 0:15 */
43 #define ST_CH1GAIN(value) (((value) & 0xffff) << 16) /* Bits 16:31 */
45 /********************** McBSP Sidetone SFIRCR bit definitions **************/
46 #define ST_FIRCOEFF(value) ((value) & 0xffff) /* Bits 0:15 */
48 /********************** McBSP Sidetone SSELCR bit definitions **************/
49 #define ST_SIDETONEEN BIT(0)
50 #define ST_COEFFWREN BIT(1)
51 #define ST_COEFFWRDONE BIT(2)
53 struct omap_mcbsp_st_data {
54 void __iomem *io_base_st;
55 struct clk *mcbsp_iclk;
58 s16 taps[128]; /* Sidetone filter coefficients */
59 int nr_taps; /* Number of filter coefficients in use */
64 static void omap_mcbsp_st_write(struct omap_mcbsp *mcbsp, u16 reg, u32 val)
66 writel_relaxed(val, mcbsp->st_data->io_base_st + reg);
69 static int omap_mcbsp_st_read(struct omap_mcbsp *mcbsp, u16 reg)
71 return readl_relaxed(mcbsp->st_data->io_base_st + reg);
74 #define MCBSP_ST_READ(mcbsp, reg) omap_mcbsp_st_read(mcbsp, OMAP_ST_REG_##reg)
75 #define MCBSP_ST_WRITE(mcbsp, reg, val) \
76 omap_mcbsp_st_write(mcbsp, OMAP_ST_REG_##reg, val)
78 static void omap_mcbsp_st_on(struct omap_mcbsp *mcbsp)
82 if (mcbsp->pdata->force_ick_on)
83 mcbsp->pdata->force_ick_on(mcbsp->st_data->mcbsp_iclk, true);
85 /* Disable Sidetone clock auto-gating for normal operation */
86 w = MCBSP_ST_READ(mcbsp, SYSCONFIG);
87 MCBSP_ST_WRITE(mcbsp, SYSCONFIG, w & ~(ST_AUTOIDLE));
89 /* Enable McBSP Sidetone */
90 w = MCBSP_READ(mcbsp, SSELCR);
91 MCBSP_WRITE(mcbsp, SSELCR, w | SIDETONEEN);
93 /* Enable Sidetone from Sidetone Core */
94 w = MCBSP_ST_READ(mcbsp, SSELCR);
95 MCBSP_ST_WRITE(mcbsp, SSELCR, w | ST_SIDETONEEN);
98 static void omap_mcbsp_st_off(struct omap_mcbsp *mcbsp)
102 w = MCBSP_ST_READ(mcbsp, SSELCR);
103 MCBSP_ST_WRITE(mcbsp, SSELCR, w & ~(ST_SIDETONEEN));
105 w = MCBSP_READ(mcbsp, SSELCR);
106 MCBSP_WRITE(mcbsp, SSELCR, w & ~(SIDETONEEN));
108 /* Enable Sidetone clock auto-gating to reduce power consumption */
109 w = MCBSP_ST_READ(mcbsp, SYSCONFIG);
110 MCBSP_ST_WRITE(mcbsp, SYSCONFIG, w | ST_AUTOIDLE);
112 if (mcbsp->pdata->force_ick_on)
113 mcbsp->pdata->force_ick_on(mcbsp->st_data->mcbsp_iclk, false);
116 static void omap_mcbsp_st_fir_write(struct omap_mcbsp *mcbsp, s16 *fir)
120 val = MCBSP_ST_READ(mcbsp, SSELCR);
122 if (val & ST_COEFFWREN)
123 MCBSP_ST_WRITE(mcbsp, SSELCR, val & ~(ST_COEFFWREN));
125 MCBSP_ST_WRITE(mcbsp, SSELCR, val | ST_COEFFWREN);
127 for (i = 0; i < 128; i++)
128 MCBSP_ST_WRITE(mcbsp, SFIRCR, fir[i]);
132 val = MCBSP_ST_READ(mcbsp, SSELCR);
133 while (!(val & ST_COEFFWRDONE) && (++i < 1000))
134 val = MCBSP_ST_READ(mcbsp, SSELCR);
136 MCBSP_ST_WRITE(mcbsp, SSELCR, val & ~(ST_COEFFWREN));
139 dev_err(mcbsp->dev, "McBSP FIR load error!\n");
142 static void omap_mcbsp_st_chgain(struct omap_mcbsp *mcbsp)
144 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
146 MCBSP_ST_WRITE(mcbsp, SGAINCR, ST_CH0GAIN(st_data->ch0gain) |
147 ST_CH1GAIN(st_data->ch1gain));
150 static int omap_mcbsp_st_set_chgain(struct omap_mcbsp *mcbsp, int channel,
153 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
159 spin_lock_irq(&mcbsp->lock);
161 st_data->ch0gain = chgain;
162 else if (channel == 1)
163 st_data->ch1gain = chgain;
167 if (st_data->enabled)
168 omap_mcbsp_st_chgain(mcbsp);
169 spin_unlock_irq(&mcbsp->lock);
174 static int omap_mcbsp_st_get_chgain(struct omap_mcbsp *mcbsp, int channel,
177 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
183 spin_lock_irq(&mcbsp->lock);
185 *chgain = st_data->ch0gain;
186 else if (channel == 1)
187 *chgain = st_data->ch1gain;
190 spin_unlock_irq(&mcbsp->lock);
195 static int omap_mcbsp_st_enable(struct omap_mcbsp *mcbsp)
197 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
202 spin_lock_irq(&mcbsp->lock);
203 st_data->enabled = 1;
204 omap_mcbsp_st_start(mcbsp);
205 spin_unlock_irq(&mcbsp->lock);
210 static int omap_mcbsp_st_disable(struct omap_mcbsp *mcbsp)
212 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
218 spin_lock_irq(&mcbsp->lock);
219 omap_mcbsp_st_stop(mcbsp);
220 st_data->enabled = 0;
221 spin_unlock_irq(&mcbsp->lock);
226 static int omap_mcbsp_st_is_enabled(struct omap_mcbsp *mcbsp)
228 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
233 return st_data->enabled;
236 static ssize_t st_taps_show(struct device *dev,
237 struct device_attribute *attr, char *buf)
239 struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
240 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
244 spin_lock_irq(&mcbsp->lock);
245 for (i = 0; i < st_data->nr_taps; i++)
246 status += sysfs_emit_at(buf, status, (i ? ", %d" : "%d"),
249 status += sysfs_emit_at(buf, status, "\n");
250 spin_unlock_irq(&mcbsp->lock);
255 static ssize_t st_taps_store(struct device *dev,
256 struct device_attribute *attr,
257 const char *buf, size_t size)
259 struct omap_mcbsp *mcbsp = dev_get_drvdata(dev);
260 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
261 int val, tmp, status, i = 0;
263 spin_lock_irq(&mcbsp->lock);
264 memset(st_data->taps, 0, sizeof(st_data->taps));
265 st_data->nr_taps = 0;
268 status = sscanf(buf, "%d%n", &val, &tmp);
269 if (status < 0 || status == 0) {
273 if (val < -32768 || val > 32767) {
277 st_data->taps[i++] = val;
284 st_data->nr_taps = i;
287 spin_unlock_irq(&mcbsp->lock);
292 static DEVICE_ATTR_RW(st_taps);
294 static const struct attribute *sidetone_attrs[] = {
295 &dev_attr_st_taps.attr,
299 static const struct attribute_group sidetone_attr_group = {
300 .attrs = (struct attribute **)sidetone_attrs,
303 int omap_mcbsp_st_start(struct omap_mcbsp *mcbsp)
305 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
307 if (st_data->enabled && !st_data->running) {
308 omap_mcbsp_st_fir_write(mcbsp, st_data->taps);
309 omap_mcbsp_st_chgain(mcbsp);
312 omap_mcbsp_st_on(mcbsp);
313 st_data->running = 1;
320 int omap_mcbsp_st_stop(struct omap_mcbsp *mcbsp)
322 struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
324 if (st_data->running) {
326 omap_mcbsp_st_off(mcbsp);
327 st_data->running = 0;
334 int omap_mcbsp_st_init(struct platform_device *pdev)
336 struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev);
337 struct omap_mcbsp_st_data *st_data;
338 struct resource *res;
341 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sidetone");
345 st_data = devm_kzalloc(mcbsp->dev, sizeof(*mcbsp->st_data), GFP_KERNEL);
349 st_data->mcbsp_iclk = devm_clk_get(mcbsp->dev, "ick");
350 if (IS_ERR(st_data->mcbsp_iclk)) {
352 "Failed to get ick, sidetone might be broken\n");
353 st_data->mcbsp_iclk = NULL;
356 st_data->io_base_st = devm_ioremap(mcbsp->dev, res->start,
358 if (!st_data->io_base_st)
361 ret = devm_device_add_group(mcbsp->dev, &sidetone_attr_group);
365 mcbsp->st_data = st_data;
370 static int omap_mcbsp_st_info_volsw(struct snd_kcontrol *kcontrol,
371 struct snd_ctl_elem_info *uinfo)
373 struct soc_mixer_control *mc =
374 (struct soc_mixer_control *)kcontrol->private_value;
378 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
380 uinfo->value.integer.min = min;
381 uinfo->value.integer.max = max;
385 #define OMAP_MCBSP_ST_CHANNEL_VOLUME(channel) \
387 omap_mcbsp_set_st_ch##channel##_volume(struct snd_kcontrol *kc, \
388 struct snd_ctl_elem_value *uc) \
390 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kc); \
391 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai); \
392 struct soc_mixer_control *mc = \
393 (struct soc_mixer_control *)kc->private_value; \
396 int val = uc->value.integer.value[0]; \
398 if (val < min || val > max) \
401 /* OMAP McBSP implementation uses index values 0..4 */ \
402 return omap_mcbsp_st_set_chgain(mcbsp, channel, val); \
406 omap_mcbsp_get_st_ch##channel##_volume(struct snd_kcontrol *kc, \
407 struct snd_ctl_elem_value *uc) \
409 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kc); \
410 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai); \
413 if (omap_mcbsp_st_get_chgain(mcbsp, channel, &chgain)) \
416 uc->value.integer.value[0] = chgain; \
420 OMAP_MCBSP_ST_CHANNEL_VOLUME(0)
421 OMAP_MCBSP_ST_CHANNEL_VOLUME(1)
423 static int omap_mcbsp_st_put_mode(struct snd_kcontrol *kcontrol,
424 struct snd_ctl_elem_value *ucontrol)
426 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
427 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
428 u8 value = ucontrol->value.integer.value[0];
430 if (value == omap_mcbsp_st_is_enabled(mcbsp))
434 omap_mcbsp_st_enable(mcbsp);
436 omap_mcbsp_st_disable(mcbsp);
441 static int omap_mcbsp_st_get_mode(struct snd_kcontrol *kcontrol,
442 struct snd_ctl_elem_value *ucontrol)
444 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
445 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
447 ucontrol->value.integer.value[0] = omap_mcbsp_st_is_enabled(mcbsp);
451 #define OMAP_MCBSP_SOC_SINGLE_S16_EXT(xname, xmin, xmax, \
452 xhandler_get, xhandler_put) \
453 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
454 .info = omap_mcbsp_st_info_volsw, \
455 .get = xhandler_get, .put = xhandler_put, \
456 .private_value = (unsigned long)&(struct soc_mixer_control) \
457 {.min = xmin, .max = xmax} }
459 #define OMAP_MCBSP_ST_CONTROLS(port) \
460 static const struct snd_kcontrol_new omap_mcbsp##port##_st_controls[] = { \
461 SOC_SINGLE_EXT("McBSP" #port " Sidetone Switch", 1, 0, 1, 0, \
462 omap_mcbsp_st_get_mode, omap_mcbsp_st_put_mode), \
463 OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP" #port " Sidetone Channel 0 Volume", \
465 omap_mcbsp_get_st_ch0_volume, \
466 omap_mcbsp_set_st_ch0_volume), \
467 OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP" #port " Sidetone Channel 1 Volume", \
469 omap_mcbsp_get_st_ch1_volume, \
470 omap_mcbsp_set_st_ch1_volume), \
473 OMAP_MCBSP_ST_CONTROLS(2);
474 OMAP_MCBSP_ST_CONTROLS(3);
476 int omap_mcbsp_st_add_controls(struct snd_soc_pcm_runtime *rtd, int port_id)
478 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
479 struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
481 if (!mcbsp->st_data) {
482 dev_warn(mcbsp->dev, "No sidetone data for port\n");
487 case 2: /* McBSP 2 */
488 return snd_soc_add_dai_controls(cpu_dai,
489 omap_mcbsp2_st_controls,
490 ARRAY_SIZE(omap_mcbsp2_st_controls));
491 case 3: /* McBSP 3 */
492 return snd_soc_add_dai_controls(cpu_dai,
493 omap_mcbsp3_st_controls,
494 ARRAY_SIZE(omap_mcbsp3_st_controls));
496 dev_err(mcbsp->dev, "Port %d not supported\n", port_id);
502 EXPORT_SYMBOL_GPL(omap_mcbsp_st_add_controls);