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89 lines
2.0 KiB
89 lines
2.0 KiB
// 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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