[thirdparty/linux.git] / drivers / usb / gadget / legacy / audio.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * audio.c -- Audio gadget driver
 *
 * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
 * Copyright (C) 2008 Analog Devices, Inc
 */

/* #define VERBOSE_DEBUG */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb/composite.h>

#define DRIVER_DESC		"Linux USB Audio Gadget"
#define DRIVER_VERSION		"Feb 2, 2012"

USB_GADGET_COMPOSITE_OPTIONS();

#ifndef CONFIG_GADGET_UAC1
#include "u_uac2.h"

/* Playback(USB-IN) Default Stereo - Fl/Fr */
static int p_chmask = UAC2_DEF_PCHMASK;
module_param(p_chmask, uint, S_IRUGO);
MODULE_PARM_DESC(p_chmask, "Playback Channel Mask");

/* Playback Default 48 KHz */
static int p_srate = UAC2_DEF_PSRATE;
module_param(p_srate, uint, S_IRUGO);
MODULE_PARM_DESC(p_srate, "Playback Sampling Rate");

/* Playback Default 16bits/sample */
static int p_ssize = UAC2_DEF_PSSIZE;
module_param(p_ssize, uint, S_IRUGO);
MODULE_PARM_DESC(p_ssize, "Playback Sample Size(bytes)");

/* Capture(USB-OUT) Default Stereo - Fl/Fr */
static int c_chmask = UAC2_DEF_CCHMASK;
module_param(c_chmask, uint, S_IRUGO);
MODULE_PARM_DESC(c_chmask, "Capture Channel Mask");

/* Capture Default 64 KHz */
static int c_srate = UAC2_DEF_CSRATE;
module_param(c_srate, uint, S_IRUGO);
MODULE_PARM_DESC(c_srate, "Capture Sampling Rate");

/* Capture Default 16bits/sample */
static int c_ssize = UAC2_DEF_CSSIZE;
module_param(c_ssize, uint, S_IRUGO);
MODULE_PARM_DESC(c_ssize, "Capture Sample Size(bytes)");
#else
#ifndef CONFIG_GADGET_UAC1_LEGACY
#include "u_uac1.h"

/* Playback(USB-IN) Default Stereo - Fl/Fr */
static int p_chmask = UAC1_DEF_PCHMASK;
module_param(p_chmask, uint, S_IRUGO);
MODULE_PARM_DESC(p_chmask, "Playback Channel Mask");

/* Playback Default 48 KHz */
static int p_srate = UAC1_DEF_PSRATE;
module_param(p_srate, uint, S_IRUGO);
MODULE_PARM_DESC(p_srate, "Playback Sampling Rate");

/* Playback Default 16bits/sample */
static int p_ssize = UAC1_DEF_PSSIZE;
module_param(p_ssize, uint, S_IRUGO);
MODULE_PARM_DESC(p_ssize, "Playback Sample Size(bytes)");

/* Capture(USB-OUT) Default Stereo - Fl/Fr */
static int c_chmask = UAC1_DEF_CCHMASK;
module_param(c_chmask, uint, S_IRUGO);
MODULE_PARM_DESC(c_chmask, "Capture Channel Mask");

/* Capture Default 48 KHz */
static int c_srate = UAC1_DEF_CSRATE;
module_param(c_srate, uint, S_IRUGO);
MODULE_PARM_DESC(c_srate, "Capture Sampling Rate");

/* Capture Default 16bits/sample */
static int c_ssize = UAC1_DEF_CSSIZE;
module_param(c_ssize, uint, S_IRUGO);
MODULE_PARM_DESC(c_ssize, "Capture Sample Size(bytes)");
#else /* CONFIG_GADGET_UAC1_LEGACY */
#include "u_uac1_legacy.h"

static char *fn_play = FILE_PCM_PLAYBACK;
module_param(fn_play, charp, S_IRUGO);
MODULE_PARM_DESC(fn_play, "Playback PCM device file name");

static char *fn_cap = FILE_PCM_CAPTURE;
module_param(fn_cap, charp, S_IRUGO);
MODULE_PARM_DESC(fn_cap, "Capture PCM device file name");

static char *fn_cntl = FILE_CONTROL;
module_param(fn_cntl, charp, S_IRUGO);
MODULE_PARM_DESC(fn_cntl, "Control device file name");

static int req_buf_size = UAC1_OUT_EP_MAX_PACKET_SIZE;
module_param(req_buf_size, int, S_IRUGO);
MODULE_PARM_DESC(req_buf_size, "ISO OUT endpoint request buffer size");

static int req_count = UAC1_REQ_COUNT;
module_param(req_count, int, S_IRUGO);
MODULE_PARM_DESC(req_count, "ISO OUT endpoint request count");

static int audio_buf_size = UAC1_AUDIO_BUF_SIZE;
module_param(audio_buf_size, int, S_IRUGO);
MODULE_PARM_DESC(audio_buf_size, "Audio buffer size");
#endif /* CONFIG_GADGET_UAC1_LEGACY */
#endif

/* string IDs are assigned dynamically */

static struct usb_string strings_dev[] = {
	[USB_GADGET_MANUFACTURER_IDX].s = "",
	[USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
	[USB_GADGET_SERIAL_IDX].s = "",
	{  } /* end of list */
};

static struct usb_gadget_strings stringtab_dev = {
	.language = 0x0409,	/* en-us */
	.strings = strings_dev,
};

static struct usb_gadget_strings *audio_strings[] = {
	&stringtab_dev,
	NULL,
};

#ifndef CONFIG_GADGET_UAC1
static struct usb_function_instance *fi_uac2;
static struct usb_function *f_uac2;
#else
static struct usb_function_instance *fi_uac1;
static struct usb_function *f_uac1;
#endif

/*-------------------------------------------------------------------------*/

/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!!  Ever!!
 * Instead:  allocate your own, using normal USB-IF procedures.
 */

/* Thanks to Linux Foundation for donating this product ID. */
#define AUDIO_VENDOR_NUM		0x1d6b	/* Linux Foundation */
#define AUDIO_PRODUCT_NUM		0x0101	/* Linux-USB Audio Gadget */

/*-------------------------------------------------------------------------*/

static struct usb_device_descriptor device_desc = {
	.bLength =		sizeof device_desc,
	.bDescriptorType =	USB_DT_DEVICE,

	/* .bcdUSB = DYNAMIC */

#ifdef CONFIG_GADGET_UAC1_LEGACY
	.bDeviceClass =		USB_CLASS_PER_INTERFACE,
	.bDeviceSubClass =	0,
	.bDeviceProtocol =	0,
#else
	.bDeviceClass =		USB_CLASS_MISC,
	.bDeviceSubClass =	0x02,
	.bDeviceProtocol =	0x01,
#endif
	/* .bMaxPacketSize0 = f(hardware) */

	/* Vendor and product id defaults change according to what configs
	 * we support.  (As does bNumConfigurations.)  These values can
	 * also be overridden by module parameters.
	 */
	.idVendor =		cpu_to_le16(AUDIO_VENDOR_NUM),
	.idProduct =		cpu_to_le16(AUDIO_PRODUCT_NUM),
	/* .bcdDevice = f(hardware) */
	/* .iManufacturer = DYNAMIC */
	/* .iProduct = DYNAMIC */
	/* NO SERIAL NUMBER */
	.bNumConfigurations =	1,
};

static const struct usb_descriptor_header *otg_desc[2];

/*-------------------------------------------------------------------------*/

static int audio_do_config(struct usb_configuration *c)
{
	int status;

	/* FIXME alloc iConfiguration string, set it in c->strings */

	if (gadget_is_otg(c->cdev->gadget)) {
		c->descriptors = otg_desc;
		c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
	}

#ifdef CONFIG_GADGET_UAC1
	f_uac1 = usb_get_function(fi_uac1);
	if (IS_ERR(f_uac1)) {
		status = PTR_ERR(f_uac1);
		return status;
	}

	status = usb_add_function(c, f_uac1);
	if (status < 0) {
		usb_put_function(f_uac1);
		return status;
	}
#else
	f_uac2 = usb_get_function(fi_uac2);
	if (IS_ERR(f_uac2)) {
		status = PTR_ERR(f_uac2);
		return status;
	}

	status = usb_add_function(c, f_uac2);
	if (status < 0) {
		usb_put_function(f_uac2);
		return status;
	}
#endif

	return 0;
}

static struct usb_configuration audio_config_driver = {
	.label			= DRIVER_DESC,
	.bConfigurationValue	= 1,
	/* .iConfiguration = DYNAMIC */
	.bmAttributes		= USB_CONFIG_ATT_SELFPOWER,
};

/*-------------------------------------------------------------------------*/

static int audio_bind(struct usb_composite_dev *cdev)
{
#ifndef CONFIG_GADGET_UAC1
	struct f_uac2_opts	*uac2_opts;
#else
#ifndef CONFIG_GADGET_UAC1_LEGACY
	struct f_uac1_opts	*uac1_opts;
#else
	struct f_uac1_legacy_opts	*uac1_opts;
#endif
#endif
	int			status;

#ifndef CONFIG_GADGET_UAC1
	fi_uac2 = usb_get_function_instance("uac2");
	if (IS_ERR(fi_uac2))
		return PTR_ERR(fi_uac2);
#else
#ifndef CONFIG_GADGET_UAC1_LEGACY
	fi_uac1 = usb_get_function_instance("uac1");
#else
	fi_uac1 = usb_get_function_instance("uac1_legacy");
#endif
	if (IS_ERR(fi_uac1))
		return PTR_ERR(fi_uac1);
#endif

#ifndef CONFIG_GADGET_UAC1
	uac2_opts = container_of(fi_uac2, struct f_uac2_opts, func_inst);
	uac2_opts->p_chmask = p_chmask;
	uac2_opts->p_srate = p_srate;
	uac2_opts->p_ssize = p_ssize;
	uac2_opts->c_chmask = c_chmask;
	uac2_opts->c_srate = c_srate;
	uac2_opts->c_ssize = c_ssize;
	uac2_opts->req_number = UAC2_DEF_REQ_NUM;
#else
#ifndef CONFIG_GADGET_UAC1_LEGACY
	uac1_opts = container_of(fi_uac1, struct f_uac1_opts, func_inst);
	uac1_opts->p_chmask = p_chmask;
	uac1_opts->p_srate = p_srate;
	uac1_opts->p_ssize = p_ssize;
	uac1_opts->c_chmask = c_chmask;
	uac1_opts->c_srate = c_srate;
	uac1_opts->c_ssize = c_ssize;
	uac1_opts->req_number = UAC1_DEF_REQ_NUM;
#else /* CONFIG_GADGET_UAC1_LEGACY */
	uac1_opts = container_of(fi_uac1, struct f_uac1_legacy_opts, func_inst);
	uac1_opts->fn_play = fn_play;
	uac1_opts->fn_cap = fn_cap;
	uac1_opts->fn_cntl = fn_cntl;
	uac1_opts->req_buf_size = req_buf_size;
	uac1_opts->req_count = req_count;
	uac1_opts->audio_buf_size = audio_buf_size;
#endif /* CONFIG_GADGET_UAC1_LEGACY */
#endif

	status = usb_string_ids_tab(cdev, strings_dev);
	if (status < 0)
		goto fail;
	device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
	device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;

	if (gadget_is_otg(cdev->gadget) && !otg_desc[0]) {
		struct usb_descriptor_header *usb_desc;

		usb_desc = usb_otg_descriptor_alloc(cdev->gadget);
		if (!usb_desc) {
			status = -ENOMEM;
			goto fail;
		}
		usb_otg_descriptor_init(cdev->gadget, usb_desc);
		otg_desc[0] = usb_desc;
		otg_desc[1] = NULL;
	}

	status = usb_add_config(cdev, &audio_config_driver, audio_do_config);
	if (status < 0)
		goto fail_otg_desc;
	usb_composite_overwrite_options(cdev, &coverwrite);

	INFO(cdev, "%s, version: %s\n", DRIVER_DESC, DRIVER_VERSION);
	return 0;

fail_otg_desc:
	kfree(otg_desc[0]);
	otg_desc[0] = NULL;
fail:
#ifndef CONFIG_GADGET_UAC1
	usb_put_function_instance(fi_uac2);
#else
	usb_put_function_instance(fi_uac1);
#endif
	return status;
}

static int audio_unbind(struct usb_composite_dev *cdev)
{
#ifdef CONFIG_GADGET_UAC1
	if (!IS_ERR_OR_NULL(f_uac1))
		usb_put_function(f_uac1);
	if (!IS_ERR_OR_NULL(fi_uac1))
		usb_put_function_instance(fi_uac1);
#else
	if (!IS_ERR_OR_NULL(f_uac2))
		usb_put_function(f_uac2);
	if (!IS_ERR_OR_NULL(fi_uac2))
		usb_put_function_instance(fi_uac2);
#endif
	kfree(otg_desc[0]);
	otg_desc[0] = NULL;

	return 0;
}

static struct usb_composite_driver audio_driver = {
	.name		= "g_audio",
	.dev		= &device_desc,
	.strings	= audio_strings,
	.max_speed	= USB_SPEED_HIGH,
	.bind		= audio_bind,
	.unbind		= audio_unbind,
};

module_usb_composite_driver(audio_driver);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Bryan Wu <cooloney@kernel.org>");
MODULE_LICENSE("GPL");
Commit	Line	Data
5fd54ace	1	// SPDX-License-Identifier: GPL-2.0+
c6994e6f BW	2	/*
	3	* audio.c -- Audio gadget driver
	4	*
	5	* Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
	6	* Copyright (C) 2008 Analog Devices, Inc
c6994e6f BW	7	*/
	8
	9	/* #define VERBOSE_DEBUG */
	10
	11	#include <linux/kernel.h>
721e2e91	12	#include <linux/module.h>
7d16e8d3	13	#include <linux/usb/composite.h>
c6994e6f	14
c6994e6f	15	#define DRIVER_DESC "Linux USB Audio Gadget"
132fcb46	16	#define DRIVER_VERSION "Feb 2, 2012"
c6994e6f	17
7d16e8d3	18	USB_GADGET_COMPOSITE_OPTIONS();
c6994e6f	19
0591bc23	20	#ifndef CONFIG_GADGET_UAC1
065a107c AP	21	#include "u_uac2.h"
065a107c AP	22
ad94ac0c	23	/* Playback(USB-IN) Default Stereo - Fl/Fr */
065a107c	24	static int p_chmask = UAC2_DEF_PCHMASK;
ad94ac0c AP	25	module_param(p_chmask, uint, S_IRUGO);
	26	MODULE_PARM_DESC(p_chmask, "Playback Channel Mask");
	27
	28	/* Playback Default 48 KHz */
065a107c	29	static int p_srate = UAC2_DEF_PSRATE;
ad94ac0c AP	30	module_param(p_srate, uint, S_IRUGO);
	31	MODULE_PARM_DESC(p_srate, "Playback Sampling Rate");
	32
	33	/* Playback Default 16bits/sample */
065a107c	34	static int p_ssize = UAC2_DEF_PSSIZE;
ad94ac0c AP	35	module_param(p_ssize, uint, S_IRUGO);
	36	MODULE_PARM_DESC(p_ssize, "Playback Sample Size(bytes)");
	37
	38	/* Capture(USB-OUT) Default Stereo - Fl/Fr */
065a107c	39	static int c_chmask = UAC2_DEF_CCHMASK;
ad94ac0c AP	40	module_param(c_chmask, uint, S_IRUGO);
	41	MODULE_PARM_DESC(c_chmask, "Capture Channel Mask");
	42
	43	/* Capture Default 64 KHz */
065a107c	44	static int c_srate = UAC2_DEF_CSRATE;
ad94ac0c AP	45	module_param(c_srate, uint, S_IRUGO);
	46	MODULE_PARM_DESC(c_srate, "Capture Sampling Rate");
	47
	48	/* Capture Default 16bits/sample */
065a107c	49	static int c_ssize = UAC2_DEF_CSSIZE;
ad94ac0c AP	50	module_param(c_ssize, uint, S_IRUGO);
ad94ac0c AP	51	MODULE_PARM_DESC(c_ssize, "Capture Sample Size(bytes)");
0d992dec	52	#else
0591bc23 RB	53	#ifndef CONFIG_GADGET_UAC1_LEGACY
	54	#include "u_uac1.h"
	55
	56	/* Playback(USB-IN) Default Stereo - Fl/Fr */
	57	static int p_chmask = UAC1_DEF_PCHMASK;
	58	module_param(p_chmask, uint, S_IRUGO);
	59	MODULE_PARM_DESC(p_chmask, "Playback Channel Mask");
	60
	61	/* Playback Default 48 KHz */
	62	static int p_srate = UAC1_DEF_PSRATE;
	63	module_param(p_srate, uint, S_IRUGO);
	64	MODULE_PARM_DESC(p_srate, "Playback Sampling Rate");
	65
	66	/* Playback Default 16bits/sample */
	67	static int p_ssize = UAC1_DEF_PSSIZE;
	68	module_param(p_ssize, uint, S_IRUGO);
	69	MODULE_PARM_DESC(p_ssize, "Playback Sample Size(bytes)");
	70
	71	/* Capture(USB-OUT) Default Stereo - Fl/Fr */
	72	static int c_chmask = UAC1_DEF_CCHMASK;
	73	module_param(c_chmask, uint, S_IRUGO);
	74	MODULE_PARM_DESC(c_chmask, "Capture Channel Mask");
	75
	76	/* Capture Default 48 KHz */
	77	static int c_srate = UAC1_DEF_CSRATE;
	78	module_param(c_srate, uint, S_IRUGO);
	79	MODULE_PARM_DESC(c_srate, "Capture Sampling Rate");
	80
	81	/* Capture Default 16bits/sample */
	82	static int c_ssize = UAC1_DEF_CSSIZE;
	83	module_param(c_ssize, uint, S_IRUGO);
	84	MODULE_PARM_DESC(c_ssize, "Capture Sample Size(bytes)");
	85	#else /* CONFIG_GADGET_UAC1_LEGACY */
d355339e	86	#include "u_uac1_legacy.h"
0d992dec AP	87
	88	static char *fn_play = FILE_PCM_PLAYBACK;
	89	module_param(fn_play, charp, S_IRUGO);
	90	MODULE_PARM_DESC(fn_play, "Playback PCM device file name");
	91
	92	static char *fn_cap = FILE_PCM_CAPTURE;
	93	module_param(fn_cap, charp, S_IRUGO);
	94	MODULE_PARM_DESC(fn_cap, "Capture PCM device file name");
	95
	96	static char *fn_cntl = FILE_CONTROL;
	97	module_param(fn_cntl, charp, S_IRUGO);
	98	MODULE_PARM_DESC(fn_cntl, "Control device file name");
	99
bcec9784	100	static int req_buf_size = UAC1_OUT_EP_MAX_PACKET_SIZE;
0d992dec AP	101	module_param(req_buf_size, int, S_IRUGO);
	102	MODULE_PARM_DESC(req_buf_size, "ISO OUT endpoint request buffer size");
	103
bcec9784	104	static int req_count = UAC1_REQ_COUNT;
0d992dec AP	105	module_param(req_count, int, S_IRUGO);
	106	MODULE_PARM_DESC(req_count, "ISO OUT endpoint request count");
	107
bcec9784	108	static int audio_buf_size = UAC1_AUDIO_BUF_SIZE;
0d992dec AP	109	module_param(audio_buf_size, int, S_IRUGO);
0d992dec AP	110	MODULE_PARM_DESC(audio_buf_size, "Audio buffer size");
0591bc23	111	#endif /* CONFIG_GADGET_UAC1_LEGACY */
ad94ac0c AP	112	#endif
ad94ac0c AP	113
d747a916 JB	114	/* string IDs are assigned dynamically */
d747a916 JB	115
d747a916	116	static struct usb_string strings_dev[] = {
cc2683c3	117	[USB_GADGET_MANUFACTURER_IDX].s = "",
276e2e4f SAS	118	[USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
276e2e4f SAS	119	[USB_GADGET_SERIAL_IDX].s = "",
d747a916 JB	120	{ } /* end of list */
	121	};
	122
	123	static struct usb_gadget_strings stringtab_dev = {
	124	.language = 0x0409, /* en-us */
	125	.strings = strings_dev,
	126	};
	127
	128	static struct usb_gadget_strings *audio_strings[] = {
	129	&stringtab_dev,
	130	NULL,
	131	};
	132
0591bc23	133	#ifndef CONFIG_GADGET_UAC1
ad94ac0c AP	134	static struct usb_function_instance *fi_uac2;
ad94ac0c AP	135	static struct usb_function *f_uac2;
0d992dec AP	136	#else
	137	static struct usb_function_instance *fi_uac1;
	138	static struct usb_function *f_uac1;
ad94ac0c AP	139	#endif
ad94ac0c AP	140
c6994e6f BW	141	/-------------------------------------------------------------------------/
	142
	143	/* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
	144	* Instead: allocate your own, using normal USB-IF procedures.
	145	*/
	146
05cbc2d5 GKH	147	/* Thanks to Linux Foundation for donating this product ID. */
	148	#define AUDIO_VENDOR_NUM 0x1d6b /* Linux Foundation */
	149	#define AUDIO_PRODUCT_NUM 0x0101 /* Linux-USB Audio Gadget */
c6994e6f BW	150
	151	/-------------------------------------------------------------------------/
	152
	153	static struct usb_device_descriptor device_desc = {
	154	.bLength = sizeof device_desc,
	155	.bDescriptorType = USB_DT_DEVICE,
	156
0aecfc1b	157	/* .bcdUSB = DYNAMIC */
c6994e6f	158
d355339e	159	#ifdef CONFIG_GADGET_UAC1_LEGACY
c6994e6f BW	160	.bDeviceClass = USB_CLASS_PER_INTERFACE,
	161	.bDeviceSubClass = 0,
	162	.bDeviceProtocol = 0,
132fcb46 JB	163	#else
	164	.bDeviceClass = USB_CLASS_MISC,
	165	.bDeviceSubClass = 0x02,
	166	.bDeviceProtocol = 0x01,
	167	#endif
c6994e6f BW	168	/* .bMaxPacketSize0 = f(hardware) */
	169
	170	/* Vendor and product id defaults change according to what configs
	171	* we support. (As does bNumConfigurations.) These values can
	172	* also be overridden by module parameters.
	173	*/
b8464bcf VT	174	.idVendor = cpu_to_le16(AUDIO_VENDOR_NUM),
b8464bcf VT	175	.idProduct = cpu_to_le16(AUDIO_PRODUCT_NUM),
c6994e6f BW	176	/* .bcdDevice = f(hardware) */
	177	/* .iManufacturer = DYNAMIC */
	178	/* .iProduct = DYNAMIC */
	179	/* NO SERIAL NUMBER */
	180	.bNumConfigurations = 1,
	181	};
	182
56023ce0	183	static const struct usb_descriptor_header *otg_desc[2];
c6994e6f BW	184
	185	/-------------------------------------------------------------------------/
	186
c94e289f	187	static int audio_do_config(struct usb_configuration *c)
c6994e6f	188	{
ad94ac0c	189	int status;
ad94ac0c	190
c6994e6f BW	191	/* FIXME alloc iConfiguration string, set it in c->strings */
	192
	193	if (gadget_is_otg(c->cdev->gadget)) {
	194	c->descriptors = otg_desc;
	195	c->bmAttributes \|= USB_CONFIG_ATT_WAKEUP;
	196	}
	197
0591bc23	198	#ifdef CONFIG_GADGET_UAC1
0d992dec AP	199	f_uac1 = usb_get_function(fi_uac1);
	200	if (IS_ERR(f_uac1)) {
	201	status = PTR_ERR(f_uac1);
	202	return status;
	203	}
	204
	205	status = usb_add_function(c, f_uac1);
	206	if (status < 0) {
	207	usb_put_function(f_uac1);
	208	return status;
	209	}
ad94ac0c AP	210	#else
	211	f_uac2 = usb_get_function(fi_uac2);
	212	if (IS_ERR(f_uac2)) {
	213	status = PTR_ERR(f_uac2);
	214	return status;
	215	}
	216
	217	status = usb_add_function(c, f_uac2);
	218	if (status < 0) {
	219	usb_put_function(f_uac2);
	220	return status;
	221	}
	222	#endif
c6994e6f BW	223
	224	return 0;
	225	}
	226
	227	static struct usb_configuration audio_config_driver = {
	228	.label = DRIVER_DESC,
c6994e6f BW	229	.bConfigurationValue = 1,
	230	/* .iConfiguration = DYNAMIC */
	231	.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
	232	};
	233
	234	/-------------------------------------------------------------------------/
	235
c94e289f	236	static int audio_bind(struct usb_composite_dev *cdev)
c6994e6f	237	{
0591bc23	238	#ifndef CONFIG_GADGET_UAC1
ad94ac0c	239	struct f_uac2_opts *uac2_opts;
0591bc23 RB	240	#else
	241	#ifndef CONFIG_GADGET_UAC1_LEGACY
	242	struct f_uac1_opts *uac1_opts;
0d992dec	243	#else
d355339e	244	struct f_uac1_legacy_opts *uac1_opts;
0591bc23	245	#endif
ad94ac0c	246	#endif
c6994e6f BW	247	int status;
c6994e6f BW	248
0591bc23	249	#ifndef CONFIG_GADGET_UAC1
ad94ac0c AP	250	fi_uac2 = usb_get_function_instance("uac2");
	251	if (IS_ERR(fi_uac2))
	252	return PTR_ERR(fi_uac2);
0591bc23 RB	253	#else
	254	#ifndef CONFIG_GADGET_UAC1_LEGACY
	255	fi_uac1 = usb_get_function_instance("uac1");
0d992dec	256	#else
d355339e	257	fi_uac1 = usb_get_function_instance("uac1_legacy");
0591bc23	258	#endif
0d992dec AP	259	if (IS_ERR(fi_uac1))
0d992dec AP	260	return PTR_ERR(fi_uac1);
ad94ac0c AP	261	#endif
ad94ac0c AP	262
0591bc23	263	#ifndef CONFIG_GADGET_UAC1
ad94ac0c AP	264	uac2_opts = container_of(fi_uac2, struct f_uac2_opts, func_inst);
	265	uac2_opts->p_chmask = p_chmask;
	266	uac2_opts->p_srate = p_srate;
	267	uac2_opts->p_ssize = p_ssize;
	268	uac2_opts->c_chmask = c_chmask;
	269	uac2_opts->c_srate = c_srate;
	270	uac2_opts->c_ssize = c_ssize;
e92b9d44	271	uac2_opts->req_number = UAC2_DEF_REQ_NUM;
0d992dec	272	#else
0591bc23 RB	273	#ifndef CONFIG_GADGET_UAC1_LEGACY
	274	uac1_opts = container_of(fi_uac1, struct f_uac1_opts, func_inst);
	275	uac1_opts->p_chmask = p_chmask;
	276	uac1_opts->p_srate = p_srate;
	277	uac1_opts->p_ssize = p_ssize;
	278	uac1_opts->c_chmask = c_chmask;
	279	uac1_opts->c_srate = c_srate;
	280	uac1_opts->c_ssize = c_ssize;
	281	uac1_opts->req_number = UAC1_DEF_REQ_NUM;
	282	#else /* CONFIG_GADGET_UAC1_LEGACY */
d355339e	283	uac1_opts = container_of(fi_uac1, struct f_uac1_legacy_opts, func_inst);
0d992dec AP	284	uac1_opts->fn_play = fn_play;
	285	uac1_opts->fn_cap = fn_cap;
	286	uac1_opts->fn_cntl = fn_cntl;
	287	uac1_opts->req_buf_size = req_buf_size;
	288	uac1_opts->req_count = req_count;
	289	uac1_opts->audio_buf_size = audio_buf_size;
0591bc23	290	#endif /* CONFIG_GADGET_UAC1_LEGACY */
ad94ac0c AP	291	#endif
ad94ac0c AP	292
e1f15ccb	293	status = usb_string_ids_tab(cdev, strings_dev);
c6994e6f BW	294	if (status < 0)
c6994e6f BW	295	goto fail;
276e2e4f SAS	296	device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
276e2e4f SAS	297	device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
c6994e6f	298
56023ce0 LJ	299	if (gadget_is_otg(cdev->gadget) && !otg_desc[0]) {
	300	struct usb_descriptor_header *usb_desc;
	301
	302	usb_desc = usb_otg_descriptor_alloc(cdev->gadget);
19b94c1f CJ	303	if (!usb_desc) {
19b94c1f CJ	304	status = -ENOMEM;
56023ce0	305	goto fail;
19b94c1f	306	}
56023ce0 LJ	307	usb_otg_descriptor_init(cdev->gadget, usb_desc);
	308	otg_desc[0] = usb_desc;
	309	otg_desc[1] = NULL;
	310	}
	311
c9bfff9c	312	status = usb_add_config(cdev, &audio_config_driver, audio_do_config);
c6994e6f	313	if (status < 0)
56023ce0	314	goto fail_otg_desc;
7d16e8d3	315	usb_composite_overwrite_options(cdev, &coverwrite);
c6994e6f BW	316
	317	INFO(cdev, "%s, version: %s\n", DRIVER_DESC, DRIVER_VERSION);
	318	return 0;
	319
56023ce0 LJ	320	fail_otg_desc:
	321	kfree(otg_desc[0]);
	322	otg_desc[0] = NULL;
c6994e6f	323	fail:
0591bc23	324	#ifndef CONFIG_GADGET_UAC1
ad94ac0c	325	usb_put_function_instance(fi_uac2);
0d992dec AP	326	#else
0d992dec AP	327	usb_put_function_instance(fi_uac1);
ad94ac0c	328	#endif
c6994e6f BW	329	return status;
	330	}
	331
c94e289f	332	static int audio_unbind(struct usb_composite_dev *cdev)
c6994e6f	333	{
0591bc23	334	#ifdef CONFIG_GADGET_UAC1
0d992dec AP	335	if (!IS_ERR_OR_NULL(f_uac1))
	336	usb_put_function(f_uac1);
	337	if (!IS_ERR_OR_NULL(fi_uac1))
	338	usb_put_function_instance(fi_uac1);
ad94ac0c AP	339	#else
	340	if (!IS_ERR_OR_NULL(f_uac2))
	341	usb_put_function(f_uac2);
	342	if (!IS_ERR_OR_NULL(fi_uac2))
	343	usb_put_function_instance(fi_uac2);
132fcb46	344	#endif
56023ce0 LJ	345	kfree(otg_desc[0]);
	346	otg_desc[0] = NULL;
	347
c6994e6f BW	348	return 0;
	349	}
	350
c94e289f	351	static struct usb_composite_driver audio_driver = {
c6994e6f BW	352	.name = "g_audio",
	353	.dev = &device_desc,
	354	.strings = audio_strings,
35a0e0bf	355	.max_speed = USB_SPEED_HIGH,
03e42bd5	356	.bind = audio_bind,
c94e289f	357	.unbind = audio_unbind,
c6994e6f BW	358	};
c6994e6f BW	359
909346a8	360	module_usb_composite_driver(audio_driver);
c6994e6f BW	361
	362	MODULE_DESCRIPTION(DRIVER_DESC);
	363	MODULE_AUTHOR("Bryan Wu <cooloney@kernel.org>");
	364	MODULE_LICENSE("GPL");
	365