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linux/drivers/usb/gadget/legacy/audio.c
Greg Kroah-Hartman d7e2853679 USB: gadget: legacy: Remove redundant license text 
Now that the SPDX tag is in all USB files, that identifies the license
in a specific and legally-defined manner.  So the extra GPL text wording
can be removed as it is no longer needed at all.

This is done on a quest to remove the 700+ different ways that files in
the kernel describe the GPL license text.  And there's unneeded stuff
like the address (sometimes incorrect) for the FSF which is never
needed.

No copyright headers or other non-license-description text was removed.

Cc: Johan Hovold <johan@kernel.org>
Cc: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Cc: Peter Chen <peter.chen@nxp.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: David Windsor <dwindsor@gmail.com>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-07 15:45:02 +01:00

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// 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
*
* Enter bugs at http://blackfin.uclinux.org/
*/
/* #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)
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");
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