117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0
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*
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* Copyright (C) 2016 Robert Jarzmik <robert.jarzmik@free.fr>
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*/
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#ifndef __SOUND_AC97_CODEC2_H
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#define __SOUND_AC97_CODEC2_H
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#include <linux/device.h>
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#define AC97_ID(vendor_id1, vendor_id2) \
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((((vendor_id1) & 0xffff) << 16) | ((vendor_id2) & 0xffff))
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#define AC97_DRIVER_ID(vendor_id1, vendor_id2, mask_id1, mask_id2, _data) \
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{ .id = (((vendor_id1) & 0xffff) << 16) | ((vendor_id2) & 0xffff), \
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.mask = (((mask_id1) & 0xffff) << 16) | ((mask_id2) & 0xffff), \
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.data = (_data) }
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struct ac97_controller;
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struct clk;
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/**
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* struct ac97_id - matches a codec device and driver on an ac97 bus
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* @id: The significant bits if the codec vendor ID1 and ID2
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* @mask: Bitmask specifying which bits of the id field are significant when
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* matching. A driver binds to a device when :
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* ((vendorID1 << 8 | vendorID2) & (mask_id1 << 8 | mask_id2)) == id.
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* @data: Private data used by the driver.
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*/
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struct ac97_id {
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unsigned int id;
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unsigned int mask;
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void *data;
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};
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/**
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* ac97_codec_device - a ac97 codec
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* @dev: the core device
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* @vendor_id: the vendor_id of the codec, as sensed on the AC-link
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* @num: the codec number, 0 is primary, 1 is first slave, etc ...
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* @clk: the clock BIT_CLK provided by the codec
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* @ac97_ctrl: ac97 digital controller on the same AC-link
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*
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* This is the device instantiated for each codec living on a AC-link. There are
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* normally 0 to 4 codec devices per AC-link, and all of them are controlled by
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* an AC97 digital controller.
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*/
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struct ac97_codec_device {
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struct device dev;
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unsigned int vendor_id;
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unsigned int num;
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struct clk *clk;
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struct ac97_controller *ac97_ctrl;
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};
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/**
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* ac97_codec_driver - a ac97 codec driver
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* @driver: the device driver structure
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* @probe: the function called when a ac97_codec_device is matched
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* @remove: the function called when the device is unbound/removed
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* @shutdown: shutdown function (might be NULL)
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* @id_table: ac97 vendor_id match table, { } member terminated
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*/
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struct ac97_codec_driver {
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struct device_driver driver;
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int (*probe)(struct ac97_codec_device *);
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void (*remove)(struct ac97_codec_device *dev);
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void (*shutdown)(struct ac97_codec_device *);
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const struct ac97_id *id_table;
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};
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static inline struct ac97_codec_device *to_ac97_device(struct device *d)
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{
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return container_of(d, struct ac97_codec_device, dev);
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}
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static inline struct ac97_codec_driver *to_ac97_driver(struct device_driver *d)
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{
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return container_of(d, struct ac97_codec_driver, driver);
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}
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#if IS_ENABLED(CONFIG_AC97_BUS_NEW)
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int snd_ac97_codec_driver_register(struct ac97_codec_driver *drv);
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void snd_ac97_codec_driver_unregister(struct ac97_codec_driver *drv);
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#else
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static inline int
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snd_ac97_codec_driver_register(struct ac97_codec_driver *drv)
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{
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return 0;
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}
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static inline void
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snd_ac97_codec_driver_unregister(struct ac97_codec_driver *drv)
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{
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}
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#endif
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static inline struct device *
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ac97_codec_dev2dev(struct ac97_codec_device *adev)
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{
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return &adev->dev;
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}
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static inline void *ac97_get_drvdata(struct ac97_codec_device *adev)
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{
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return dev_get_drvdata(ac97_codec_dev2dev(adev));
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}
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static inline void ac97_set_drvdata(struct ac97_codec_device *adev,
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void *data)
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{
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dev_set_drvdata(ac97_codec_dev2dev(adev), data);
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}
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void *snd_ac97_codec_get_platdata(const struct ac97_codec_device *adev);
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#endif
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