90 lines
2.0 KiB
C
90 lines
2.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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//
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// Register map access API - AC'97 support
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//
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// Copyright 2013 Linaro Ltd. All rights reserved.
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <sound/ac97_codec.h>
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bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case AC97_RESET:
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case AC97_POWERDOWN:
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case AC97_INT_PAGING:
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case AC97_EXTENDED_ID:
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case AC97_EXTENDED_STATUS:
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case AC97_EXTENDED_MID:
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case AC97_EXTENDED_MSTATUS:
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case AC97_GPIO_STATUS:
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case AC97_MISC_AFE:
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case AC97_VENDOR_ID1:
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case AC97_VENDOR_ID2:
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case AC97_CODEC_CLASS_REV:
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case AC97_PCI_SVID:
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case AC97_PCI_SID:
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case AC97_FUNC_SELECT:
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case AC97_FUNC_INFO:
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case AC97_SENSE_INFO:
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return true;
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default:
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return false;
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}
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}
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EXPORT_SYMBOL_GPL(regmap_ac97_default_volatile);
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static int regmap_ac97_reg_read(void *context, unsigned int reg,
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unsigned int *val)
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{
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struct snd_ac97 *ac97 = context;
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*val = ac97->bus->ops->read(ac97, reg);
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return 0;
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}
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static int regmap_ac97_reg_write(void *context, unsigned int reg,
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unsigned int val)
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{
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struct snd_ac97 *ac97 = context;
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ac97->bus->ops->write(ac97, reg, val);
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return 0;
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}
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static const struct regmap_bus ac97_regmap_bus = {
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.reg_write = regmap_ac97_reg_write,
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.reg_read = regmap_ac97_reg_read,
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};
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struct regmap *__regmap_init_ac97(struct snd_ac97 *ac97,
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const struct regmap_config *config,
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struct lock_class_key *lock_key,
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const char *lock_name)
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{
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return __regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config,
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lock_key, lock_name);
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}
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EXPORT_SYMBOL_GPL(__regmap_init_ac97);
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struct regmap *__devm_regmap_init_ac97(struct snd_ac97 *ac97,
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const struct regmap_config *config,
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struct lock_class_key *lock_key,
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const char *lock_name)
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{
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return __devm_regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config,
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lock_key, lock_name);
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}
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EXPORT_SYMBOL_GPL(__devm_regmap_init_ac97);
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MODULE_LICENSE("GPL v2");
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