--- /dev/null
+/*
+ * HD-audio regmap helpers
+ */
+
+#ifndef __SOUND_HDA_REGMAP_H
+#define __SOUND_HDA_REGMAP_H
+
+#include <linux/regmap.h>
+#include <sound/core.h>
+#include <sound/hdaudio.h>
+
+int snd_hdac_regmap_init(struct hdac_device *codec);
+void snd_hdac_regmap_exit(struct hdac_device *codec);
+
+int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
+ unsigned int *val);
+int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
+ unsigned int val);
+int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
+ unsigned int mask, unsigned int val);
+
+/**
+ * snd_hdac_regmap_encode_verb - encode the verb to a pseudo register
+ * @nid: widget NID
+ * @verb: codec verb
+ *
+ * Returns an encoded pseudo register.
+ */
+#define snd_hdac_regmap_encode_verb(nid, verb) \
+ (((verb) << 8) | 0x80000 | ((unsigned int)(nid) << 20))
+
+/**
+ * snd_hdac_regmap_encode_amp - encode the AMP verb to a pseudo register
+ * @nid: widget NID
+ * @ch: channel (left = 0, right = 1)
+ * @dir: direction (#HDA_INPUT, #HDA_OUTPUT)
+ * @idx: input index value
+ *
+ * Returns an encoded pseudo register.
+ */
+#define snd_hdac_regmap_encode_amp(nid, ch, dir, idx) \
+ (snd_hdac_regmap_encode_verb(nid, AC_VERB_GET_AMP_GAIN_MUTE) | \
+ ((ch) ? AC_AMP_GET_RIGHT : AC_AMP_GET_LEFT) | \
+ ((dir) == HDA_OUTPUT ? AC_AMP_GET_OUTPUT : AC_AMP_GET_INPUT) | \
+ (idx))
+
+/**
+ * snd_hdac_regmap_write - Write a verb with caching
+ * @nid: codec NID
+ * @reg: verb to write
+ * @val: value to write
+ *
+ * For writing an amp value, use snd_hda_regmap_amp_update().
+ */
+static inline int
+snd_hdac_regmap_write(struct hdac_device *codec, hda_nid_t nid,
+ unsigned int verb, unsigned int val)
+{
+ unsigned int cmd = snd_hdac_regmap_encode_verb(nid, verb);
+
+ return snd_hdac_regmap_write_raw(codec, cmd, val);
+}
+
+/**
+ * snd_hda_regmap_update - Update a verb value with caching
+ * @nid: codec NID
+ * @verb: verb to update
+ * @mask: bit mask to update
+ * @val: value to update
+ *
+ * For updating an amp value, use snd_hda_regmap_amp_update().
+ */
+static inline int
+snd_hdac_regmap_update(struct hdac_device *codec, hda_nid_t nid,
+ unsigned int verb, unsigned int mask,
+ unsigned int val)
+{
+ unsigned int cmd = snd_hdac_regmap_encode_verb(nid, verb);
+
+ return snd_hdac_regmap_update_raw(codec, cmd, mask, val);
+}
+
+/**
+ * snd_hda_regmap_read - Read a verb with caching
+ * @nid: codec NID
+ * @verb: verb to read
+ * @val: pointer to store the value
+ *
+ * For reading an amp value, use snd_hda_regmap_get_amp().
+ */
+static inline int
+snd_hdac_regmap_read(struct hdac_device *codec, hda_nid_t nid,
+ unsigned int verb, unsigned int *val)
+{
+ unsigned int cmd = snd_hdac_regmap_encode_verb(nid, verb);
+
+ return snd_hdac_regmap_read_raw(codec, cmd, val);
+}
+
+/**
+ * snd_hdac_regmap_get_amp - Read AMP value
+ * @codec: HD-audio codec
+ * @nid: NID to read the AMP value
+ * @ch: channel (left=0 or right=1)
+ * @direction: #HDA_INPUT or #HDA_OUTPUT
+ * @index: the index value (only for input direction)
+ * @val: the pointer to store the value
+ *
+ * Read AMP value. The volume is between 0 to 0x7f, 0x80 = mute bit.
+ * Returns the value or a negative error.
+ */
+static inline int
+snd_hdac_regmap_get_amp(struct hdac_device *codec, hda_nid_t nid,
+ int ch, int dir, int idx)
+{
+ unsigned int cmd = snd_hdac_regmap_encode_amp(nid, ch, dir, idx);
+ int err, val;
+
+ err = snd_hdac_regmap_read_raw(codec, cmd, &val);
+ return err < 0 ? err : val;
+}
+
+/**
+ * snd_hdac_regmap_update_amp - update the AMP value
+ * @codec: HD-audio codec
+ * @nid: NID to read the AMP value
+ * @ch: channel (left=0 or right=1)
+ * @direction: #HDA_INPUT or #HDA_OUTPUT
+ * @idx: the index value (only for input direction)
+ * @mask: bit mask to set
+ * @val: the bits value to set
+ *
+ * Update the AMP value with a bit mask.
+ * Returns 0 if the value is unchanged, 1 if changed, or a negative error.
+ */
+static inline int
+snd_hdac_regmap_update_amp(struct hdac_device *codec, hda_nid_t nid,
+ int ch, int dir, int idx, int mask, int val)
+{
+ unsigned int cmd = snd_hdac_regmap_encode_amp(nid, ch, dir, idx);
+
+ return snd_hdac_regmap_update_raw(codec, cmd, mask, val);
+}
+
+#endif /* __SOUND_HDA_REGMAP_H */
--- /dev/null
+/*
+ * Regmap support for HD-audio verbs
+ *
+ * A virtual register is translated to one or more hda verbs for write,
+ * vice versa for read.
+ *
+ * A few limitations:
+ * - Provided for not all verbs but only subset standard non-volatile verbs.
+ * - For reading, only AC_VERB_GET_* variants can be used.
+ * - For writing, mapped to the *corresponding* AC_VERB_SET_* variants,
+ * so can't handle asymmetric verbs for read and write
+ */
+
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/regmap.h>
+#include <linux/export.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <sound/core.h>
+#include <sound/hdaudio.h>
+#include <sound/hda_regmap.h>
+
+#ifdef CONFIG_PM
+#define codec_is_running(codec) \
+ (atomic_read(&(codec)->in_pm) || \
+ !pm_runtime_suspended(&(codec)->dev))
+#else
+#define codec_is_running(codec) true
+#endif
+
+#define get_verb(reg) (((reg) >> 8) & 0xfff)
+
+static bool hda_volatile_reg(struct device *dev, unsigned int reg)
+{
+ unsigned int verb = get_verb(reg);
+
+ switch (verb) {
+ case AC_VERB_GET_PROC_COEF:
+ case AC_VERB_GET_COEF_INDEX:
+ case AC_VERB_GET_PROC_STATE:
+ case AC_VERB_GET_POWER_STATE:
+ case AC_VERB_GET_PIN_SENSE:
+ case AC_VERB_GET_HDMI_DIP_SIZE:
+ case AC_VERB_GET_HDMI_ELDD:
+ case AC_VERB_GET_HDMI_DIP_INDEX:
+ case AC_VERB_GET_HDMI_DIP_DATA:
+ case AC_VERB_GET_HDMI_DIP_XMIT:
+ case AC_VERB_GET_HDMI_CP_CTRL:
+ case AC_VERB_GET_HDMI_CHAN_SLOT:
+ case AC_VERB_GET_DEVICE_SEL:
+ case AC_VERB_GET_DEVICE_LIST: /* read-only volatile */
+ return true;
+ }
+
+ return false;
+}
+
+static bool hda_writeable_reg(struct device *dev, unsigned int reg)
+{
+ unsigned int verb = get_verb(reg);
+
+ switch (verb & 0xf00) {
+ case AC_VERB_GET_STREAM_FORMAT:
+ case AC_VERB_GET_AMP_GAIN_MUTE:
+ return true;
+ case 0xf00:
+ break;
+ default:
+ return false;
+ }
+
+ switch (verb) {
+ case AC_VERB_GET_CONNECT_SEL:
+ case AC_VERB_GET_SDI_SELECT:
+ case AC_VERB_GET_CONV:
+ case AC_VERB_GET_PIN_WIDGET_CONTROL:
+ case AC_VERB_GET_UNSOLICITED_RESPONSE: /* only as SET_UNSOLICITED_ENABLE */
+ case AC_VERB_GET_BEEP_CONTROL:
+ case AC_VERB_GET_EAPD_BTLENABLE:
+ case AC_VERB_GET_DIGI_CONVERT_1:
+ case AC_VERB_GET_DIGI_CONVERT_2: /* only for beep control */
+ case AC_VERB_GET_VOLUME_KNOB_CONTROL:
+ case AC_VERB_GET_CONFIG_DEFAULT:
+ case AC_VERB_GET_GPIO_MASK:
+ case AC_VERB_GET_GPIO_DIRECTION:
+ case AC_VERB_GET_GPIO_DATA: /* not for volatile read */
+ case AC_VERB_GET_GPIO_WAKE_MASK:
+ case AC_VERB_GET_GPIO_UNSOLICITED_RSP_MASK:
+ case AC_VERB_GET_GPIO_STICKY_MASK:
+ case AC_VERB_GET_CVT_CHAN_COUNT:
+ return true;
+ }
+
+ return false;
+}
+
+static bool hda_readable_reg(struct device *dev, unsigned int reg)
+{
+ unsigned int verb = get_verb(reg);
+
+ switch (verb) {
+ case AC_VERB_PARAMETERS:
+ case AC_VERB_GET_CONNECT_LIST:
+ case AC_VERB_GET_SUBSYSTEM_ID:
+ return true;
+ }
+
+ return hda_writeable_reg(dev, reg);
+}
+
+static int hda_reg_read(void *context, unsigned int reg, unsigned int *val)
+{
+ struct hdac_device *codec = context;
+
+ if (!codec_is_running(codec))
+ return -EAGAIN;
+ reg |= (codec->addr << 28);
+ return snd_hdac_exec_verb(codec, reg, 0, val);
+}
+
+static int hda_reg_write(void *context, unsigned int reg, unsigned int val)
+{
+ struct hdac_device *codec = context;
+ unsigned int verb;
+ int i, bytes, err;
+
+ if (!codec_is_running(codec))
+ return codec->lazy_cache ? 0 : -EAGAIN;
+
+ reg &= ~0x00080000U; /* drop GET bit */
+ reg |= (codec->addr << 28);
+ verb = get_verb(reg);
+
+ switch (verb & 0xf00) {
+ case AC_VERB_SET_AMP_GAIN_MUTE:
+ verb = AC_VERB_SET_AMP_GAIN_MUTE;
+ if (reg & AC_AMP_GET_LEFT)
+ verb |= AC_AMP_SET_LEFT >> 8;
+ else
+ verb |= AC_AMP_SET_RIGHT >> 8;
+ if (reg & AC_AMP_GET_OUTPUT) {
+ verb |= AC_AMP_SET_OUTPUT >> 8;
+ } else {
+ verb |= AC_AMP_SET_INPUT >> 8;
+ verb |= reg & 0xf;
+ }
+ break;
+ }
+
+ switch (verb) {
+ case AC_VERB_SET_DIGI_CONVERT_1:
+ bytes = 2;
+ break;
+ case AC_VERB_SET_CONFIG_DEFAULT_BYTES_0:
+ bytes = 4;
+ break;
+ default:
+ bytes = 1;
+ break;
+ }
+
+ for (i = 0; i < bytes; i++) {
+ reg &= ~0xfffff;
+ reg |= (verb + i) << 8 | ((val >> (8 * i)) & 0xff);
+ err = snd_hdac_exec_verb(codec, reg, 0, NULL);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+static const struct regmap_config hda_regmap_cfg = {
+ .name = "hdaudio",
+ .reg_bits = 32,
+ .val_bits = 32,
+ .max_register = 0xfffffff,
+ .writeable_reg = hda_writeable_reg,
+ .readable_reg = hda_readable_reg,
+ .volatile_reg = hda_volatile_reg,
+ .cache_type = REGCACHE_RBTREE,
+ .reg_read = hda_reg_read,
+ .reg_write = hda_reg_write,
+};
+
+int snd_hdac_regmap_init(struct hdac_device *codec)
+{
+ struct regmap *regmap;
+
+ regmap = regmap_init(&codec->dev, NULL, codec, &hda_regmap_cfg);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+ codec->regmap = regmap;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_regmap_init);
+
+void snd_hdac_regmap_exit(struct hdac_device *codec)
+{
+ if (codec->regmap) {
+ regmap_exit(codec->regmap);
+ codec->regmap = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit);
+
+/*
+ * helper functions
+ */
+
+/* write a pseudo-register value (w/o power sequence) */
+static int reg_raw_write(struct hdac_device *codec, unsigned int reg,
+ unsigned int val)
+{
+ if (!codec->regmap)
+ return hda_reg_write(codec, reg, val);
+ else
+ return regmap_write(codec->regmap, reg, val);
+}
+
+/**
+ * snd_hdac_regmap_write_raw - write a pseudo register with power mgmt
+ * @codec: the codec object
+ * @reg: pseudo register
+ * @val: value to write
+ *
+ * Returns zero if successful or a negative error code.
+ */
+int snd_hdac_regmap_write_raw(struct hdac_device *codec, unsigned int reg,
+ unsigned int val)
+{
+ int err;
+
+ err = reg_raw_write(codec, reg, val);
+ if (err == -EAGAIN) {
+ snd_hdac_power_up(codec);
+ err = reg_raw_write(codec, reg, val);
+ snd_hdac_power_down(codec);
+ }
+ return err;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw);
+
+static int reg_raw_read(struct hdac_device *codec, unsigned int reg,
+ unsigned int *val)
+{
+ if (!codec->regmap)
+ return hda_reg_read(codec, reg, val);
+ else
+ return regmap_read(codec->regmap, reg, val);
+}
+
+/**
+ * snd_hdac_regmap_read_raw - read a pseudo register with power mgmt
+ * @codec: the codec object
+ * @reg: pseudo register
+ * @val: pointer to store the read value
+ *
+ * Returns zero if successful or a negative error code.
+ */
+int snd_hdac_regmap_read_raw(struct hdac_device *codec, unsigned int reg,
+ unsigned int *val)
+{
+ int err;
+
+ err = reg_raw_read(codec, reg, val);
+ if (err == -EAGAIN) {
+ snd_hdac_power_up(codec);
+ err = reg_raw_read(codec, reg, val);
+ snd_hdac_power_down(codec);
+ }
+ return err;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw);
+
+/**
+ * snd_hdac_regmap_update_raw - update a pseudo register with power mgmt
+ * @codec: the codec object
+ * @reg: pseudo register
+ * @mask: bit mask to udpate
+ * @val: value to update
+ *
+ * Returns zero if successful or a negative error code.
+ */
+int snd_hdac_regmap_update_raw(struct hdac_device *codec, unsigned int reg,
+ unsigned int mask, unsigned int val)
+{
+ unsigned int orig;
+ int err;
+
+ val &= mask;
+ err = snd_hdac_regmap_read_raw(codec, reg, &orig);
+ if (err < 0)
+ return err;
+ val |= orig & ~mask;
+ if (val == orig)
+ return 0;
+ err = snd_hdac_regmap_write_raw(codec, reg, val);
+ if (err < 0)
+ return err;
+ return 1;
+}
+EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw);
projects / openwrt / staging / blogic.git / commitdiff