diff options
Diffstat (limited to 'sound/hda/hdac_regmap.c')
| -rw-r--r-- | sound/hda/hdac_regmap.c | 601 |
1 files changed, 0 insertions, 601 deletions
diff --git a/sound/hda/hdac_regmap.c b/sound/hda/hdac_regmap.c deleted file mode 100644 index 97cee096a286..000000000000 --- a/sound/hda/hdac_regmap.c +++ /dev/null @@ -1,601 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * 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 <sound/core.h> -#include <sound/hdaudio.h> -#include <sound/hda_regmap.h> -#include "local.h" - -static int codec_pm_lock(struct hdac_device *codec) -{ - return snd_hdac_keep_power_up(codec); -} - -static void codec_pm_unlock(struct hdac_device *codec, int lock) -{ - if (lock == 1) - snd_hdac_power_down_pm(codec); -} - -#define get_verb(reg) (((reg) >> 8) & 0xfff) - -static bool hda_volatile_reg(struct device *dev, unsigned int reg) -{ - struct hdac_device *codec = dev_to_hdac_dev(dev); - unsigned int verb = get_verb(reg); - - switch (verb) { - case AC_VERB_GET_PROC_COEF: - return !codec->cache_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) -{ - struct hdac_device *codec = dev_to_hdac_dev(dev); - unsigned int verb = get_verb(reg); - const unsigned int *v; - int i; - - snd_array_for_each(&codec->vendor_verbs, i, v) { - if (verb == *v) - return true; - } - - if (codec->caps_overwriting) - return true; - - switch (verb & 0xf00) { - case AC_VERB_GET_STREAM_FORMAT: - case AC_VERB_GET_AMP_GAIN_MUTE: - return true; - case AC_VERB_GET_PROC_COEF: - return codec->cache_coef; - case 0xf00: - break; - default: - return false; - } - - switch (verb) { - case AC_VERB_GET_CONNECT_SEL: - case AC_VERB_GET_SDI_SELECT: - 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_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: - return true; - } - - return false; -} - -static bool hda_readable_reg(struct device *dev, unsigned int reg) -{ - struct hdac_device *codec = dev_to_hdac_dev(dev); - unsigned int verb = get_verb(reg); - - if (codec->caps_overwriting) - return true; - - switch (verb) { - case AC_VERB_PARAMETERS: - case AC_VERB_GET_CONNECT_LIST: - case AC_VERB_GET_SUBSYSTEM_ID: - return true; - /* below are basically writable, but disabled for reducing unnecessary - * writes at sync - */ - case AC_VERB_GET_CONFIG_DEFAULT: /* usually just read */ - case AC_VERB_GET_CONV: /* managed in PCM code */ - case AC_VERB_GET_CVT_CHAN_COUNT: /* managed in HDMI CA code */ - return true; - } - - return hda_writeable_reg(dev, reg); -} - -/* - * Stereo amp pseudo register: - * for making easier to handle the stereo volume control, we provide a - * fake register to deal both left and right channels by a single - * (pseudo) register access. A verb consisting of SET_AMP_GAIN with - * *both* SET_LEFT and SET_RIGHT bits takes a 16bit value, the lower 8bit - * for the left and the upper 8bit for the right channel. - */ -static bool is_stereo_amp_verb(unsigned int reg) -{ - if (((reg >> 8) & 0x700) != AC_VERB_SET_AMP_GAIN_MUTE) - return false; - return (reg & (AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT)) == - (AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT); -} - -/* read a pseudo stereo amp register (16bit left+right) */ -static int hda_reg_read_stereo_amp(struct hdac_device *codec, - unsigned int reg, unsigned int *val) -{ - unsigned int left, right; - int err; - - reg &= ~(AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT); - err = snd_hdac_exec_verb(codec, reg | AC_AMP_GET_LEFT, 0, &left); - if (err < 0) - return err; - err = snd_hdac_exec_verb(codec, reg | AC_AMP_GET_RIGHT, 0, &right); - if (err < 0) - return err; - *val = left | (right << 8); - return 0; -} - -/* write a pseudo stereo amp register (16bit left+right) */ -static int hda_reg_write_stereo_amp(struct hdac_device *codec, - unsigned int reg, unsigned int val) -{ - int err; - unsigned int verb, left, right; - - verb = AC_VERB_SET_AMP_GAIN_MUTE << 8; - if (reg & AC_AMP_GET_OUTPUT) - verb |= AC_AMP_SET_OUTPUT; - else - verb |= AC_AMP_SET_INPUT | ((reg & 0xf) << 8); - reg = (reg & ~0xfffff) | verb; - - left = val & 0xff; - right = (val >> 8) & 0xff; - if (left == right) { - reg |= AC_AMP_SET_LEFT | AC_AMP_SET_RIGHT; - return snd_hdac_exec_verb(codec, reg | left, 0, NULL); - } - - err = snd_hdac_exec_verb(codec, reg | AC_AMP_SET_LEFT | left, 0, NULL); - if (err < 0) - return err; - err = snd_hdac_exec_verb(codec, reg | AC_AMP_SET_RIGHT | right, 0, NULL); - if (err < 0) - return err; - return 0; -} - -/* read a pseudo coef register (16bit) */ -static int hda_reg_read_coef(struct hdac_device *codec, unsigned int reg, - unsigned int *val) -{ - unsigned int verb; - int err; - - if (!codec->cache_coef) - return -EINVAL; - /* LSB 8bit = coef index */ - verb = (reg & ~0xfff00) | (AC_VERB_SET_COEF_INDEX << 8); - err = snd_hdac_exec_verb(codec, verb, 0, NULL); - if (err < 0) - return err; - verb = (reg & ~0xfffff) | (AC_VERB_GET_COEF_INDEX << 8); - return snd_hdac_exec_verb(codec, verb, 0, val); -} - -/* write a pseudo coef register (16bit) */ -static int hda_reg_write_coef(struct hdac_device *codec, unsigned int reg, - unsigned int val) -{ - unsigned int verb; - int err; - - if (!codec->cache_coef) - return -EINVAL; - /* LSB 8bit = coef index */ - verb = (reg & ~0xfff00) | (AC_VERB_SET_COEF_INDEX << 8); - err = snd_hdac_exec_verb(codec, verb, 0, NULL); - if (err < 0) - return err; - verb = (reg & ~0xfffff) | (AC_VERB_GET_COEF_INDEX << 8) | - (val & 0xffff); - return snd_hdac_exec_verb(codec, verb, 0, NULL); -} - -static int hda_reg_read(void *context, unsigned int reg, unsigned int *val) -{ - struct hdac_device *codec = context; - int verb = get_verb(reg); - int err; - int pm_lock = 0; - - if (verb != AC_VERB_GET_POWER_STATE) { - pm_lock = codec_pm_lock(codec); - if (pm_lock < 0) - return -EAGAIN; - } - reg |= (codec->addr << 28); - if (is_stereo_amp_verb(reg)) { - err = hda_reg_read_stereo_amp(codec, reg, val); - goto out; - } - if (verb == AC_VERB_GET_PROC_COEF) { - err = hda_reg_read_coef(codec, reg, val); - goto out; - } - if ((verb & 0x700) == AC_VERB_SET_AMP_GAIN_MUTE) - reg &= ~AC_AMP_FAKE_MUTE; - - err = snd_hdac_exec_verb(codec, reg, 0, val); - if (err < 0) - goto out; - /* special handling for asymmetric reads */ - if (verb == AC_VERB_GET_POWER_STATE) { - if (*val & AC_PWRST_ERROR) - *val = -1; - else /* take only the actual state */ - *val = (*val >> 4) & 0x0f; - } - out: - codec_pm_unlock(codec, pm_lock); - return err; -} - -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; - int pm_lock = 0; - - if (codec->caps_overwriting) - return 0; - - reg &= ~0x00080000U; /* drop GET bit */ - reg |= (codec->addr << 28); - verb = get_verb(reg); - - if (verb != AC_VERB_SET_POWER_STATE) { - pm_lock = codec_pm_lock(codec); - if (pm_lock < 0) - return codec->lazy_cache ? 0 : -EAGAIN; - } - - if (is_stereo_amp_verb(reg)) { - err = hda_reg_write_stereo_amp(codec, reg, val); - goto out; - } - - if (verb == AC_VERB_SET_PROC_COEF) { - err = hda_reg_write_coef(codec, reg, val); - goto out; - } - - switch (verb & 0xf00) { - case AC_VERB_SET_AMP_GAIN_MUTE: - if ((reg & AC_AMP_FAKE_MUTE) && (val & AC_AMP_MUTE)) - val = 0; - 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) - goto out; - } - - out: - codec_pm_unlock(codec, pm_lock); - return err; -} - -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_MAPLE, - .reg_read = hda_reg_read, - .reg_write = hda_reg_write, - .use_single_read = true, - .use_single_write = true, - .disable_locking = true, -}; - -/** - * snd_hdac_regmap_init - Initialize regmap for HDA register accesses - * @codec: the codec object - * - * Returns zero for success or a negative error code. - */ -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; - snd_array_init(&codec->vendor_verbs, sizeof(unsigned int), 8); - return 0; -} -EXPORT_SYMBOL_GPL(snd_hdac_regmap_init); - -/** - * snd_hdac_regmap_exit - Release the regmap from HDA codec - * @codec: the codec object - */ -void snd_hdac_regmap_exit(struct hdac_device *codec) -{ - if (codec->regmap) { - regmap_exit(codec->regmap); - codec->regmap = NULL; - snd_array_free(&codec->vendor_verbs); - } -} -EXPORT_SYMBOL_GPL(snd_hdac_regmap_exit); - -/** - * snd_hdac_regmap_add_vendor_verb - add a vendor-specific verb to regmap - * @codec: the codec object - * @verb: verb to allow accessing via regmap - * - * Returns zero for success or a negative error code. - */ -int snd_hdac_regmap_add_vendor_verb(struct hdac_device *codec, - unsigned int verb) -{ - unsigned int *p = snd_array_new(&codec->vendor_verbs); - - if (!p) - return -ENOMEM; - *p = verb | 0x800; /* set GET bit */ - return 0; -} -EXPORT_SYMBOL_GPL(snd_hdac_regmap_add_vendor_verb); - -/* - * 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) -{ - int err; - - mutex_lock(&codec->regmap_lock); - if (!codec->regmap) - err = hda_reg_write(codec, reg, val); - else - err = regmap_write(codec->regmap, reg, val); - mutex_unlock(&codec->regmap_lock); - return err; -} - -/* a helper macro to call @func_call; retry with power-up if failed */ -#define CALL_RAW_FUNC(codec, func_call) \ - ({ \ - int _err = func_call; \ - if (_err == -EAGAIN) { \ - _err = snd_hdac_power_up_pm(codec); \ - if (_err >= 0) \ - _err = func_call; \ - snd_hdac_power_down_pm(codec); \ - } \ - _err;}) - -/** - * 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) -{ - return CALL_RAW_FUNC(codec, reg_raw_write(codec, reg, val)); -} -EXPORT_SYMBOL_GPL(snd_hdac_regmap_write_raw); - -static int reg_raw_read(struct hdac_device *codec, unsigned int reg, - unsigned int *val, bool uncached) -{ - int err; - - mutex_lock(&codec->regmap_lock); - if (uncached || !codec->regmap) - err = hda_reg_read(codec, reg, val); - else - err = regmap_read(codec->regmap, reg, val); - mutex_unlock(&codec->regmap_lock); - return err; -} - -static int __snd_hdac_regmap_read_raw(struct hdac_device *codec, - unsigned int reg, unsigned int *val, - bool uncached) -{ - return CALL_RAW_FUNC(codec, reg_raw_read(codec, reg, val, uncached)); -} - -/** - * 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) -{ - return __snd_hdac_regmap_read_raw(codec, reg, val, false); -} -EXPORT_SYMBOL_GPL(snd_hdac_regmap_read_raw); - -/* Works like snd_hdac_regmap_read_raw(), but this doesn't read from the - * cache but always via hda verbs. - */ -int snd_hdac_regmap_read_raw_uncached(struct hdac_device *codec, - unsigned int reg, unsigned int *val) -{ - return __snd_hdac_regmap_read_raw(codec, reg, val, true); -} - -static int reg_raw_update(struct hdac_device *codec, unsigned int reg, - unsigned int mask, unsigned int val) -{ - unsigned int orig; - bool change; - int err; - - mutex_lock(&codec->regmap_lock); - if (codec->regmap) { - err = regmap_update_bits_check(codec->regmap, reg, mask, val, - &change); - if (!err) - err = change ? 1 : 0; - } else { - err = hda_reg_read(codec, reg, &orig); - if (!err) { - val &= mask; - val |= orig & ~mask; - if (val != orig) { - err = hda_reg_write(codec, reg, val); - if (!err) - err = 1; - } - } - } - mutex_unlock(&codec->regmap_lock); - return err; -} - -/** - * snd_hdac_regmap_update_raw - update a pseudo register with power mgmt - * @codec: the codec object - * @reg: pseudo register - * @mask: bit mask to update - * @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) -{ - return CALL_RAW_FUNC(codec, reg_raw_update(codec, reg, mask, val)); -} -EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw); - -static int reg_raw_update_once(struct hdac_device *codec, unsigned int reg, - unsigned int mask, unsigned int val) -{ - int err = 0; - - if (!codec->regmap) - return reg_raw_update(codec, reg, mask, val); - - mutex_lock(&codec->regmap_lock); - /* Discard any updates to already initialised registers. */ - if (!regcache_reg_cached(codec->regmap, reg)) - err = regmap_update_bits(codec->regmap, reg, mask, val); - mutex_unlock(&codec->regmap_lock); - return err; -} - -/** - * snd_hdac_regmap_update_raw_once - initialize the register value only once - * @codec: the codec object - * @reg: pseudo register - * @mask: bit mask to update - * @val: value to update - * - * Performs the update of the register bits only once when the register - * hasn't been initialized yet. Used in HD-audio legacy driver. - * Returns zero if successful or a negative error code - */ -int snd_hdac_regmap_update_raw_once(struct hdac_device *codec, unsigned int reg, - unsigned int mask, unsigned int val) -{ - return CALL_RAW_FUNC(codec, reg_raw_update_once(codec, reg, mask, val)); -} -EXPORT_SYMBOL_GPL(snd_hdac_regmap_update_raw_once); - -/** - * snd_hdac_regmap_sync - sync out the cached values for PM resume - * @codec: the codec object - */ -void snd_hdac_regmap_sync(struct hdac_device *codec) -{ - mutex_lock(&codec->regmap_lock); - if (codec->regmap) - regcache_sync(codec->regmap); - mutex_unlock(&codec->regmap_lock); -} -EXPORT_SYMBOL_GPL(snd_hdac_regmap_sync); |