2 * Regmap support for HD-audio verbs
4 * A virtual register is translated to one or more hda verbs for write,
8 * - Provided for not all verbs but only subset standard non-volatile verbs.
9 * - For reading, only AC_VERB_GET_* variants can be used.
10 * - For writing, mapped to the *corresponding* AC_VERB_SET_* variants,
11 * so can't handle asymmetric verbs for read and write
14 #include <linux/slab.h>
15 #include <linux/device.h>
16 #include <linux/regmap.h>
17 #include <linux/export.h>
19 #include <linux/pm_runtime.h>
20 #include <sound/core.h>
21 #include <sound/hdaudio.h>
22 #include <sound/hda_regmap.h>
25 #define codec_is_running(codec) \
26 (atomic_read(&(codec)->in_pm) || \
27 !pm_runtime_suspended(&(codec)->dev))
29 #define codec_is_running(codec) true
32 #define get_verb(reg) (((reg) >> 8) & 0xfff)
34 static bool hda_volatile_reg(struct device *dev, unsigned int reg)
36 struct hdac_device *codec = dev_to_hdac_dev(dev);
37 unsigned int verb = get_verb(reg);
40 case AC_VERB_GET_PROC_COEF:
41 return !codec->cache_coef;
42 case AC_VERB_GET_COEF_INDEX:
43 case AC_VERB_GET_PROC_STATE:
44 case AC_VERB_GET_POWER_STATE:
45 case AC_VERB_GET_PIN_SENSE:
46 case AC_VERB_GET_HDMI_DIP_SIZE:
47 case AC_VERB_GET_HDMI_ELDD:
48 case AC_VERB_GET_HDMI_DIP_INDEX:
49 case AC_VERB_GET_HDMI_DIP_DATA:
50 case AC_VERB_GET_HDMI_DIP_XMIT:
51 case AC_VERB_GET_HDMI_CP_CTRL:
52 case AC_VERB_GET_HDMI_CHAN_SLOT:
53 case AC_VERB_GET_DEVICE_SEL:
54 case AC_VERB_GET_DEVICE_LIST: /* read-only volatile */
61 static bool hda_writeable_reg(struct device *dev, unsigned int reg)
63 struct hdac_device *codec = dev_to_hdac_dev(dev);
64 unsigned int verb = get_verb(reg);
67 for (i = 0; i < codec->vendor_verbs.used; i++) {
68 unsigned int *v = snd_array_elem(&codec->vendor_verbs, i);
73 if (codec->caps_overwriting)
76 switch (verb & 0xf00) {
77 case AC_VERB_GET_STREAM_FORMAT:
78 case AC_VERB_GET_AMP_GAIN_MUTE:
80 case AC_VERB_GET_PROC_COEF:
81 return codec->cache_coef;
89 case AC_VERB_GET_CONNECT_SEL:
90 case AC_VERB_GET_SDI_SELECT:
91 case AC_VERB_GET_PIN_WIDGET_CONTROL:
92 case AC_VERB_GET_UNSOLICITED_RESPONSE: /* only as SET_UNSOLICITED_ENABLE */
93 case AC_VERB_GET_BEEP_CONTROL:
94 case AC_VERB_GET_EAPD_BTLENABLE:
95 case AC_VERB_GET_DIGI_CONVERT_1:
96 case AC_VERB_GET_DIGI_CONVERT_2: /* only for beep control */
97 case AC_VERB_GET_VOLUME_KNOB_CONTROL:
98 case AC_VERB_GET_GPIO_MASK:
99 case AC_VERB_GET_GPIO_DIRECTION:
100 case AC_VERB_GET_GPIO_DATA: /* not for volatile read */
101 case AC_VERB_GET_GPIO_WAKE_MASK:
102 case AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK:
103 case AC_VERB_GET_GPIO_STICKY_MASK:
110 static bool hda_readable_reg(struct device *dev, unsigned int reg)
112 struct hdac_device *codec = dev_to_hdac_dev(dev);
113 unsigned int verb = get_verb(reg);
115 if (codec->caps_overwriting)
119 case AC_VERB_PARAMETERS:
120 case AC_VERB_GET_CONNECT_LIST:
121 case AC_VERB_GET_SUBSYSTEM_ID:
123 /* below are basically writable, but disabled for reducing unnecessary
126 case AC_VERB_GET_CONFIG_DEFAULT: /* usually just read */
127 case AC_VERB_GET_CONV: /* managed in PCM code */
128 case AC_VERB_GET_CVT_CHAN_COUNT: /* managed in HDMI CA code */
132 return hda_writeable_reg(dev, reg);
136 * Stereo amp pseudo register:
137 * for making easier to handle the stereo volume control, we provide a
138 * fake register to deal both left and right channels by a single
139 * (pseudo) register access. A verb consisting of SET_AMP_GAIN with
140 * *both* SET_LEFT and SET_RIGHT bits takes a 16bit value, the lower 8bit
141 * for the left and the upper 8bit for the right channel.
143 static bool is_stereo_amp_verb(unsigned int reg)
145 if (((reg >> 8) & 0x700) != AC_VERB_SET_AMP_GAIN_MUTE)
147 return (reg & (AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT)) ==
148 (AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT);
151 /* read a pseudo stereo amp register (16bit left+right) */
152 static int hda_reg_read_stereo_amp(struct hdac_device *codec,
153 unsigned int reg, unsigned int *val)
155 unsigned int left, right;
158 reg &= ~(AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT);
159 err = snd_hdac_exec_verb(codec, reg | AC_AMP_GET_LEFT, 0, &left);
162 err = snd_hdac_exec_verb(codec, reg | AC_AMP_GET_RIGHT, 0, &right);
165 *val = left | (right << 8);
169 /* write a pseudo stereo amp register (16bit left+right) */
170 static int hda_reg_write_stereo_amp(struct hdac_device *codec,
171 unsigned int reg, unsigned int val)
174 unsigned int verb, left, right;
176 verb = AC_VERB_SET_AMP_GAIN_MUTE << 8;
177 if (reg & AC_AMP_GET_OUTPUT)
178 verb |= AC_AMP_SET_OUTPUT;
180 verb |= AC_AMP_SET_INPUT | ((reg & 0xf) << 8);
181 reg = (reg & ~0xfffff) | verb;
184 right = (val >> 8) & 0xff;
186 reg |= AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT;
187 return snd_hdac_exec_verb(codec, reg | left, 0, NULL);
190 err = snd_hdac_exec_verb(codec, reg | AC_AMP_SET_LEFT | left, 0, NULL);
193 err = snd_hdac_exec_verb(codec, reg | AC_AMP_SET_RIGHT | right, 0, NULL);
199 /* read a pseudo coef register (16bit) */
200 static int hda_reg_read_coef(struct hdac_device *codec, unsigned int reg,
206 if (!codec->cache_coef)
208 /* LSB 8bit = coef index */
209 verb = (reg & ~0xfff00) | (AC_VERB_SET_COEF_INDEX << 8);
210 err = snd_hdac_exec_verb(codec, verb, 0, NULL);
213 verb = (reg & ~0xfffff) | (AC_VERB_GET_COEF_INDEX << 8);
214 return snd_hdac_exec_verb(codec, verb, 0, val);
217 /* write a pseudo coef register (16bit) */
218 static int hda_reg_write_coef(struct hdac_device *codec, unsigned int reg,
224 if (!codec->cache_coef)
226 /* LSB 8bit = coef index */
227 verb = (reg & ~0xfff00) | (AC_VERB_SET_COEF_INDEX << 8);
228 err = snd_hdac_exec_verb(codec, verb, 0, NULL);
231 verb = (reg & ~0xfffff) | (AC_VERB_GET_COEF_INDEX << 8) |
233 return snd_hdac_exec_verb(codec, verb, 0, NULL);
236 static int hda_reg_read(void *context, unsigned int reg, unsigned int *val)
238 struct hdac_device *codec = context;
239 int verb = get_verb(reg);
242 if (!codec_is_running(codec) && verb != AC_VERB_GET_POWER_STATE)
244 reg |= (codec->addr << 28);
245 if (is_stereo_amp_verb(reg))
246 return hda_reg_read_stereo_amp(codec, reg, val);
247 if (verb == AC_VERB_GET_PROC_COEF)
248 return hda_reg_read_coef(codec, reg, val);
249 if ((verb & 0x700) == AC_VERB_SET_AMP_GAIN_MUTE)
250 reg &= ~AC_AMP_FAKE_MUTE;
252 err = snd_hdac_exec_verb(codec, reg, 0, val);
255 /* special handling for asymmetric reads */
256 if (verb == AC_VERB_GET_POWER_STATE) {
257 if (*val & AC_PWRST_ERROR)
259 else /* take only the actual state */
260 *val = (*val >> 4) & 0x0f;
265 static int hda_reg_write(void *context, unsigned int reg, unsigned int val)
267 struct hdac_device *codec = context;
271 if (codec->caps_overwriting)
274 reg &= ~0x00080000U; /* drop GET bit */
275 reg |= (codec->addr << 28);
276 verb = get_verb(reg);
278 if (!codec_is_running(codec) && verb != AC_VERB_SET_POWER_STATE)
279 return codec->lazy_cache ? 0 : -EAGAIN;
281 if (is_stereo_amp_verb(reg))
282 return hda_reg_write_stereo_amp(codec, reg, val);
284 if (verb == AC_VERB_SET_PROC_COEF)
285 return hda_reg_write_coef(codec, reg, val);
287 switch (verb & 0xf00) {
288 case AC_VERB_SET_AMP_GAIN_MUTE:
289 if ((reg & AC_AMP_FAKE_MUTE) && (val & AC_AMP_MUTE))
291 verb = AC_VERB_SET_AMP_GAIN_MUTE;
292 if (reg & AC_AMP_GET_LEFT)
293 verb |= AC_AMP_SET_LEFT >> 8;
295 verb |= AC_AMP_SET_RIGHT >> 8;
296 if (reg & AC_AMP_GET_OUTPUT) {
297 verb |= AC_AMP_SET_OUTPUT >> 8;
299 verb |= AC_AMP_SET_INPUT >> 8;
306 case AC_VERB_SET_DIGI_CONVERT_1:
309 case AC_VERB_SET_CONFIG_DEFAULT_BYTES_0:
317 for (i = 0; i < bytes; i++) {
319 reg |= (verb + i) << 8 | ((val >> (8 * i)) & 0xff);
320 err = snd_hdac_exec_verb(codec, reg, 0, NULL);
328 static const struct regmap_config hda_regmap_cfg = {
332 .max_register = 0xfffffff,
333 .writeable_reg = hda_writeable_reg,
334 .readable_reg = hda_readable_reg,
335 .volatile_reg = hda_volatile_reg,
336 .cache_type = REGCACHE_RBTREE,
337 .reg_read = hda_reg_read,
338 .reg_write = hda_reg_write,
339 .use_single_rw = true,
343 * snd_hdac_regmap_init - Initialize regmap for HDA register accesses
344 * @codec: the codec object
346 * Returns zero for success or a negative error code.
348 int snd_hdac_regmap_init(struct hdac_device *codec)
350 struct regmap *regmap;
352 regmap = regmap_init(&codec->dev, NULL, codec, &hda_regmap_cfg);
354 return PTR_ERR(regmap);
355 codec->regmap = regmap;
356 snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8);
359 EXPORT_SYMBOL_GPL(snd_hdac_regmap_init);
362 * snd_hdac_regmap_init - Release the regmap from HDA codec
363 * @codec: the codec object
365 void snd_hdac_regmap_exit(struct hdac_device *codec)
368 regmap_exit(codec->regmap);
369 codec->regmap = NULL;
370 snd_array_free(&codec->vendor_verbs);
373 EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit);
376 * snd_hdac_regmap_add_vendor_verb - add a vendor-specific verb to regmap
377 * @codec: the codec object
378 * @verb: verb to allow accessing via regmap
380 * Returns zero for success or a negative error code.
382 int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec,
385 unsigned int *p = snd_array_new(&codec->vendor_verbs);
389 *p = verb | 0x800; /* set GET bit */
392 EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb);
398 /* write a pseudo-register value (w/o power sequence) */
399 static int reg_raw_write(struct hdac_device *codec, unsigned int reg,
403 return hda_reg_write(codec, reg, val);
405 return regmap_write(codec->regmap, reg, val);
409 * snd_hdac_regmap_write_raw - write a pseudo register with power mgmt
410 * @codec: the codec object
411 * @reg: pseudo register
412 * @val: value to write
414 * Returns zero if successful or a negative error code.
416 int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
421 err = reg_raw_write(codec, reg, val);
422 if (err == -EAGAIN) {
423 err = snd_hdac_power_up_pm(codec);
425 err = reg_raw_write(codec, reg, val);
426 snd_hdac_power_down_pm(codec);
430 EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw);
432 static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
436 return hda_reg_read(codec, reg, val);
438 return regmap_read(codec->regmap, reg, val);
442 * snd_hdac_regmap_read_raw - read a pseudo register with power mgmt
443 * @codec: the codec object
444 * @reg: pseudo register
445 * @val: pointer to store the read value
447 * Returns zero if successful or a negative error code.
449 int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
454 err = reg_raw_read(codec, reg, val);
455 if (err == -EAGAIN) {
456 err = snd_hdac_power_up_pm(codec);
458 err = reg_raw_read(codec, reg, val);
459 snd_hdac_power_down_pm(codec);
463 EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);
466 * snd_hdac_regmap_update_raw - update a pseudo register with power mgmt
467 * @codec: the codec object
468 * @reg: pseudo register
469 * @mask: bit mask to udpate
470 * @val: value to update
472 * Returns zero if successful or a negative error code.
474 int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
475 unsigned int mask, unsigned int val)
481 err = snd_hdac_regmap_read_raw(codec, reg, &orig);
487 err = snd_hdac_regmap_write_raw(codec, reg, val);
492 EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw);