[deliverable/linux.git] / sound / hda / ext / hdac_ext_bus.c

/*
 *  hdac-ext-bus.c - HD-audio extended core bus functions.
 *
 *  Copyright (C) 2014-2015 Intel Corp
 *  Author: Jeeja KP <jeeja.kp@intel.com>
 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <sound/hdaudio_ext.h>

MODULE_DESCRIPTION("HDA extended core");
MODULE_LICENSE("GPL v2");

static void hdac_ext_writel(u32 value, u32 __iomem *addr)
{
	writel(value, addr);
}

static u32 hdac_ext_readl(u32 __iomem *addr)
{
	return readl(addr);
}

static void hdac_ext_writew(u16 value, u16 __iomem *addr)
{
	writew(value, addr);
}

static u16 hdac_ext_readw(u16 __iomem *addr)
{
	return readw(addr);
}

static void hdac_ext_writeb(u8 value, u8 __iomem *addr)
{
	writeb(value, addr);
}

static u8 hdac_ext_readb(u8 __iomem *addr)
{
	return readb(addr);
}

static int hdac_ext_dma_alloc_pages(struct hdac_bus *bus, int type,
			   size_t size, struct snd_dma_buffer *buf)
{
	return snd_dma_alloc_pages(type, bus->dev, size, buf);
}

static void hdac_ext_dma_free_pages(struct hdac_bus *bus, struct snd_dma_buffer *buf)
{
	snd_dma_free_pages(buf);
}

static const struct hdac_io_ops hdac_ext_default_io = {
	.reg_writel = hdac_ext_writel,
	.reg_readl = hdac_ext_readl,
	.reg_writew = hdac_ext_writew,
	.reg_readw = hdac_ext_readw,
	.reg_writeb = hdac_ext_writeb,
	.reg_readb = hdac_ext_readb,
	.dma_alloc_pages = hdac_ext_dma_alloc_pages,
	.dma_free_pages = hdac_ext_dma_free_pages,
};

/**
 * snd_hdac_ext_bus_init - initialize a HD-audio extended bus
 * @ebus: the pointer to extended bus object
 * @dev: device pointer
 * @ops: bus verb operators
 * @io_ops: lowlevel I/O operators, can be NULL. If NULL core will use
 * default ops
 *
 * Returns 0 if successful, or a negative error code.
 */
int snd_hdac_ext_bus_init(struct hdac_ext_bus *ebus, struct device *dev,
			const struct hdac_bus_ops *ops,
			const struct hdac_io_ops *io_ops)
{
	int ret;
	static int idx;

	/* check if io ops are provided, if not load the defaults */
	if (io_ops == NULL)
		io_ops = &hdac_ext_default_io;

	ret = snd_hdac_bus_init(&ebus->bus, dev, ops, io_ops);
	if (ret < 0)
		return ret;

	INIT_LIST_HEAD(&ebus->hlink_list);
	ebus->idx = idx++;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_init);

/**
 * snd_hdac_ext_bus_exit - clean up a HD-audio extended bus
 * @ebus: the pointer to extended bus object
 */
void snd_hdac_ext_bus_exit(struct hdac_ext_bus *ebus)
{
	snd_hdac_bus_exit(&ebus->bus);
	WARN_ON(!list_empty(&ebus->hlink_list));
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_exit);

static void default_release(struct device *dev)
{
	snd_hdac_ext_bus_device_exit(container_of(dev, struct hdac_device, dev));
}

/**
 * snd_hdac_ext_bus_device_init - initialize the HDA extended codec base device
 * @ebus: hdac extended bus to attach to
 * @addr: codec address
 *
 * Returns zero for success or a negative error code.
 */
int snd_hdac_ext_bus_device_init(struct hdac_ext_bus *ebus, int addr)
{
	struct hdac_ext_device *edev;
	struct hdac_device *hdev = NULL;
	struct hdac_bus *bus = ebus_to_hbus(ebus);
	char name[15];
	int ret;

	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
	if (!edev)
		return -ENOMEM;
	hdev = &edev->hdac;

	snprintf(name, sizeof(name), "ehdaudio%dD%d", ebus->idx, addr);

	ret  = snd_hdac_device_init(hdev, bus, name, addr);
	if (ret < 0) {
		dev_err(bus->dev, "device init failed for hdac device\n");
		return ret;
	}
	hdev->type = HDA_DEV_ASOC;
	hdev->dev.release = default_release;

	ret = snd_hdac_device_register(hdev);
	if (ret) {
		dev_err(bus->dev, "failed to register hdac device\n");
		snd_hdac_ext_bus_device_exit(hdev);
		return ret;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_init);

/**
 * snd_hdac_ext_bus_device_exit - clean up a HD-audio extended codec base device
 * @hdev: hdac device to clean up
 */
void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev)
{
	struct hdac_ext_device *edev = to_ehdac_device(hdev);

	snd_hdac_device_exit(hdev);
	kfree(edev);
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_exit);

/**
 * snd_hdac_ext_bus_device_remove - remove HD-audio extended codec base devices
 *
 * @ebus: HD-audio extended bus
 */
void snd_hdac_ext_bus_device_remove(struct hdac_ext_bus *ebus)
{
	struct hdac_device *codec, *__codec;
	/*
	 * we need to remove all the codec devices objects created in the
	 * snd_hdac_ext_bus_device_init
	 */
	list_for_each_entry_safe(codec, __codec, &ebus->bus.codec_list, list) {
		snd_hdac_device_unregister(codec);
		put_device(&codec->dev);
	}
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_remove);
#define dev_to_hdac(dev) (container_of((dev), \
			struct hdac_device, dev))

static inline struct hdac_ext_driver *get_edrv(struct device *dev)
{
	struct hdac_driver *hdrv = drv_to_hdac_driver(dev->driver);
	struct hdac_ext_driver *edrv = to_ehdac_driver(hdrv);

	return edrv;
}

static inline struct hdac_ext_device *get_edev(struct device *dev)
{
	struct hdac_device *hdev = dev_to_hdac_dev(dev);
	struct hdac_ext_device *edev = to_ehdac_device(hdev);

	return edev;
}

static int hda_ext_drv_probe(struct device *dev)
{
	return (get_edrv(dev))->probe(get_edev(dev));
}

static int hdac_ext_drv_remove(struct device *dev)
{
	return (get_edrv(dev))->remove(get_edev(dev));
}

static void hdac_ext_drv_shutdown(struct device *dev)
{
	return (get_edrv(dev))->shutdown(get_edev(dev));
}

/**
 * snd_hda_ext_driver_register - register a driver for ext hda devices
 *
 * @drv: ext hda driver structure
 */
int snd_hda_ext_driver_register(struct hdac_ext_driver *drv)
{
	drv->hdac.type = HDA_DEV_ASOC;
	drv->hdac.driver.bus = &snd_hda_bus_type;
	/* we use default match */

	if (drv->probe)
		drv->hdac.driver.probe = hda_ext_drv_probe;
	if (drv->remove)
		drv->hdac.driver.remove = hdac_ext_drv_remove;
	if (drv->shutdown)
		drv->hdac.driver.shutdown = hdac_ext_drv_shutdown;

	return driver_register(&drv->hdac.driver);
}
EXPORT_SYMBOL_GPL(snd_hda_ext_driver_register);

/**
 * snd_hda_ext_driver_unregister - unregister a driver for ext hda devices
 *
 * @drv: ext hda driver structure
 */
void snd_hda_ext_driver_unregister(struct hdac_ext_driver *drv)
{
	driver_unregister(&drv->hdac.driver);
}
EXPORT_SYMBOL_GPL(snd_hda_ext_driver_unregister);
Commit	Line	Data
dfe66a18 JK	1	/*
	2	* hdac-ext-bus.c - HD-audio extended core bus functions.
	3	*
	4	* Copyright (C) 2014-2015 Intel Corp
	5	* Author: Jeeja KP <jeeja.kp@intel.com>
	6	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; version 2 of the License.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	18	*/
	19
	20	#include <linux/module.h>
	21	#include <linux/slab.h>
42f2bb1c	22	#include <linux/io.h>
dfe66a18 JK	23	#include <sound/hdaudio_ext.h>
	24
	25	MODULE_DESCRIPTION("HDA extended core");
	26	MODULE_LICENSE("GPL v2");
	27
99463b3a VK	28	static void hdac_ext_writel(u32 value, u32 __iomem *addr)
	29	{
	30	writel(value, addr);
	31	}
	32
	33	static u32 hdac_ext_readl(u32 __iomem *addr)
	34	{
	35	return readl(addr);
	36	}
	37
	38	static void hdac_ext_writew(u16 value, u16 __iomem *addr)
	39	{
	40	writew(value, addr);
	41	}
	42
	43	static u16 hdac_ext_readw(u16 __iomem *addr)
	44	{
	45	return readw(addr);
	46	}
	47
	48	static void hdac_ext_writeb(u8 value, u8 __iomem *addr)
	49	{
	50	writeb(value, addr);
	51	}
	52
	53	static u8 hdac_ext_readb(u8 __iomem *addr)
	54	{
	55	return readb(addr);
	56	}
	57
	58	static int hdac_ext_dma_alloc_pages(struct hdac_bus *bus, int type,
	59	size_t size, struct snd_dma_buffer *buf)
	60	{
	61	return snd_dma_alloc_pages(type, bus->dev, size, buf);
	62	}
	63
	64	static void hdac_ext_dma_free_pages(struct hdac_bus bus, struct snd_dma_buffer buf)
	65	{
	66	snd_dma_free_pages(buf);
	67	}
	68
	69	static const struct hdac_io_ops hdac_ext_default_io = {
	70	.reg_writel = hdac_ext_writel,
	71	.reg_readl = hdac_ext_readl,
	72	.reg_writew = hdac_ext_writew,
	73	.reg_readw = hdac_ext_readw,
	74	.reg_writeb = hdac_ext_writeb,
	75	.reg_readb = hdac_ext_readb,
	76	.dma_alloc_pages = hdac_ext_dma_alloc_pages,
	77	.dma_free_pages = hdac_ext_dma_free_pages,
	78	};
	79
dfe66a18 JK	80	/**
	81	* snd_hdac_ext_bus_init - initialize a HD-audio extended bus
	82	* @ebus: the pointer to extended bus object
	83	* @dev: device pointer
	84	* @ops: bus verb operators
99463b3a VK	85	* @io_ops: lowlevel I/O operators, can be NULL. If NULL core will use
99463b3a VK	86	* default ops
dfe66a18 JK	87	*
	88	* Returns 0 if successful, or a negative error code.
	89	*/
	90	int snd_hdac_ext_bus_init(struct hdac_ext_bus ebus, struct device dev,
	91	const struct hdac_bus_ops *ops,
	92	const struct hdac_io_ops *io_ops)
	93	{
	94	int ret;
	95	static int idx;
	96
99463b3a VK	97	/* check if io ops are provided, if not load the defaults */
	98	if (io_ops == NULL)
	99	io_ops = &hdac_ext_default_io;
	100
dfe66a18 JK	101	ret = snd_hdac_bus_init(&ebus->bus, dev, ops, io_ops);
	102	if (ret < 0)
	103	return ret;
	104
	105	INIT_LIST_HEAD(&ebus->hlink_list);
	106	ebus->idx = idx++;
	107
	108	return 0;
	109	}
	110	EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_init);
	111
	112	/**
	113	* snd_hdac_ext_bus_exit - clean up a HD-audio extended bus
	114	* @ebus: the pointer to extended bus object
	115	*/
	116	void snd_hdac_ext_bus_exit(struct hdac_ext_bus *ebus)
	117	{
	118	snd_hdac_bus_exit(&ebus->bus);
	119	WARN_ON(!list_empty(&ebus->hlink_list));
	120	}
	121	EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_exit);
	122
	123	static void default_release(struct device *dev)
	124	{
	125	snd_hdac_ext_bus_device_exit(container_of(dev, struct hdac_device, dev));
	126	}
	127
	128	/**
a512f561	129	* snd_hdac_ext_bus_device_init - initialize the HDA extended codec base device
dfe66a18 JK	130	* @ebus: hdac extended bus to attach to
	131	* @addr: codec address
	132	*
	133	* Returns zero for success or a negative error code.
	134	*/
	135	int snd_hdac_ext_bus_device_init(struct hdac_ext_bus *ebus, int addr)
	136	{
a512f561	137	struct hdac_ext_device *edev;
dfe66a18 JK	138	struct hdac_device *hdev = NULL;
	139	struct hdac_bus *bus = ebus_to_hbus(ebus);
	140	char name[15];
	141	int ret;
	142
e57690b1	143	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
a512f561	144	if (!edev)
dfe66a18	145	return -ENOMEM;
a512f561	146	hdev = &edev->hdac;
dfe66a18 JK	147
	148	snprintf(name, sizeof(name), "ehdaudio%dD%d", ebus->idx, addr);
	149
	150	ret = snd_hdac_device_init(hdev, bus, name, addr);
	151	if (ret < 0) {
	152	dev_err(bus->dev, "device init failed for hdac device\n");
	153	return ret;
	154	}
	155	hdev->type = HDA_DEV_ASOC;
	156	hdev->dev.release = default_release;
	157
	158	ret = snd_hdac_device_register(hdev);
	159	if (ret) {
	160	dev_err(bus->dev, "failed to register hdac device\n");
	161	snd_hdac_ext_bus_device_exit(hdev);
	162	return ret;
	163	}
a512f561	164
dfe66a18 JK	165	return 0;
	166	}
	167	EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_init);
	168
	169	/**
	170	* snd_hdac_ext_bus_device_exit - clean up a HD-audio extended codec base device
	171	* @hdev: hdac device to clean up
	172	*/
	173	void snd_hdac_ext_bus_device_exit(struct hdac_device *hdev)
	174	{
a512f561 VK	175	struct hdac_ext_device *edev = to_ehdac_device(hdev);
a512f561 VK	176
dfe66a18	177	snd_hdac_device_exit(hdev);
a512f561	178	kfree(edev);
dfe66a18 JK	179	}
dfe66a18 JK	180	EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_exit);
ee2d51b3 VK	181
	182	/**
	183	* snd_hdac_ext_bus_device_remove - remove HD-audio extended codec base devices
	184	*
	185	* @ebus: HD-audio extended bus
	186	*/
	187	void snd_hdac_ext_bus_device_remove(struct hdac_ext_bus *ebus)
	188	{
	189	struct hdac_device codec, __codec;
	190	/*
	191	* we need to remove all the codec devices objects created in the
	192	* snd_hdac_ext_bus_device_init
	193	*/
	194	list_for_each_entry_safe(codec, __codec, &ebus->bus.codec_list, list) {
	195	snd_hdac_device_unregister(codec);
	196	put_device(&codec->dev);
	197	}
	198	}
	199	EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_remove);
d51783c1 VK	200	#define dev_to_hdac(dev) (container_of((dev), \
	201	struct hdac_device, dev))
	202
	203	static inline struct hdac_ext_driver get_edrv(struct device dev)
	204	{
	205	struct hdac_driver *hdrv = drv_to_hdac_driver(dev->driver);
	206	struct hdac_ext_driver *edrv = to_ehdac_driver(hdrv);
	207
	208	return edrv;
	209	}
	210
	211	static inline struct hdac_ext_device get_edev(struct device dev)
	212	{
	213	struct hdac_device *hdev = dev_to_hdac_dev(dev);
	214	struct hdac_ext_device *edev = to_ehdac_device(hdev);
	215
	216	return edev;
	217	}
	218
	219	static int hda_ext_drv_probe(struct device *dev)
	220	{
	221	return (get_edrv(dev))->probe(get_edev(dev));
	222	}
	223
	224	static int hdac_ext_drv_remove(struct device *dev)
	225	{
	226	return (get_edrv(dev))->remove(get_edev(dev));
	227	}
	228
	229	static void hdac_ext_drv_shutdown(struct device *dev)
	230	{
	231	return (get_edrv(dev))->shutdown(get_edev(dev));
	232	}
	233
	234	/**
	235	* snd_hda_ext_driver_register - register a driver for ext hda devices
	236	*
	237	* @drv: ext hda driver structure
	238	*/
	239	int snd_hda_ext_driver_register(struct hdac_ext_driver *drv)
	240	{
	241	drv->hdac.type = HDA_DEV_ASOC;
	242	drv->hdac.driver.bus = &snd_hda_bus_type;
	243	/* we use default match */
	244
	245	if (drv->probe)
	246	drv->hdac.driver.probe = hda_ext_drv_probe;
	247	if (drv->remove)
	248	drv->hdac.driver.remove = hdac_ext_drv_remove;
	249	if (drv->shutdown)
	250	drv->hdac.driver.shutdown = hdac_ext_drv_shutdown;
	251
	252	return driver_register(&drv->hdac.driver);
	253	}
	254	EXPORT_SYMBOL_GPL(snd_hda_ext_driver_register);
	255
	256	/**
	257	* snd_hda_ext_driver_unregister - unregister a driver for ext hda devices
	258	*
	259	* @drv: ext hda driver structure
	260	*/
	261	void snd_hda_ext_driver_unregister(struct hdac_ext_driver *drv)
	262	{
	263	driver_unregister(&drv->hdac.driver);
264	}
265	EXPORT_SYMBOL_GPL(snd_hda_ext_driver_unregister);