g_audio.c File Reference

#include <sys/param.h>
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/queue.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/linker_set.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <dev/usb/usb.h>
#include <dev/usb/usb_cdc.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbhid.h>
#include "usb_if.h"
#include <dev/usb/usb_debug.h>
#include <dev/usb/gadget/g_audio.h>

Include dependency graph for g_audio.c:

Go to the source code of this file.

Data Structures
struct	g_audio_softc

Macros
#define	USB_DEBUG_VAR   g_audio_debug

Enumerations
enum	{   G_AUDIO_ISOC0_RD , G_AUDIO_ISOC1_RD , G_AUDIO_ISOC0_WR , G_AUDIO_ISOC1_WR ,   G_AUDIO_N_TRANSFER }

Functions
	__FBSDID ("$FreeBSD$")
static	SYSCTL_NODE (_hw_usb, OID_AUTO, g_audio, CTLFLAG_RW|CTLFLAG_MPSAFE, 0, "USB audio gadget")
	SYSCTL_INT (_hw_usb_g_audio, OID_AUTO, mode, CTLFLAG_RWTUN, &g_audio_mode, 0, "Mode selection")
	SYSCTL_INT (_hw_usb_g_audio, OID_AUTO, pattern_interval, CTLFLAG_RWTUN, &g_audio_pattern_interval, 0, "Pattern interval in milliseconds")
	SYSCTL_STRING (_hw_usb_g_audio, OID_AUTO, pattern, CTLFLAG_RW, &g_audio_pattern_data, sizeof(g_audio_pattern_data), "Data pattern")
	SYSCTL_INT (_hw_usb_g_audio, OID_AUTO, throughput, CTLFLAG_RD, &g_audio_throughput, sizeof(g_audio_throughput), "Throughput in bytes per second")
static void	g_audio_watchdog (void *arg)
static void	g_audio_timeout (void *arg)
	DRIVER_MODULE (g_audio, uhub, g_audio_driver, g_audio_devclass, 0, 0)
	MODULE_DEPEND (g_audio, usb, 1, 1, 1)
static void	g_audio_timeout_reset (struct g_audio_softc *sc)
static void	g_audio_watchdog_reset (struct g_audio_softc *sc)
static int	g_audio_probe (device_t dev)
static int	g_audio_attach (device_t dev)
static int	g_audio_detach (device_t dev)
static int32_t	g_noise (struct g_audio_softc *sc)
static void	g_audio_make_samples (struct g_audio_softc *sc, int16_t *ptr, int samples)
static void	g_audio_isoc_write_callback (struct usb_xfer *xfer, usb_error_t error)
static void	g_audio_isoc_read_callback (struct usb_xfer *xfer, usb_error_t error)
static int	g_audio_handle_request (device_t dev, const void *preq, void **pptr, uint16_t *plen, uint16_t offset, uint8_t *pstate)

Variables
static int	g_audio_mode = 0
static int	g_audio_pattern_interval = 1000
static char	g_audio_pattern_data [G_AUDIO_MAX_STRLEN]
static int	g_audio_throughput
static device_probe_t	g_audio_probe
static device_attach_t	g_audio_attach
static device_detach_t	g_audio_detach
static usb_handle_request_t	g_audio_handle_request
static usb_callback_t	g_audio_isoc_read_callback
static usb_callback_t	g_audio_isoc_write_callback
static devclass_t	g_audio_devclass
static device_method_t	g_audio_methods []
static driver_t	g_audio_driver
static const struct usb_config	g_audio_config [G_AUDIO_N_TRANSFER]

Macro Definition Documentation

USB_DEBUG_VAR

#define USB_DEBUG_VAR   g_audio_debug

Definition at line 62 of file g_audio.c.

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
G_AUDIO_ISOC0_RD
G_AUDIO_ISOC1_RD
G_AUDIO_ISOC0_WR
G_AUDIO_ISOC1_WR
G_AUDIO_N_TRANSFER

Definition at line 67 of file g_audio.c.

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

DRIVER_MODULE()

DRIVER_MODULE	(	g_audio	,
		uhub	,
		g_audio_driver	,
		g_audio_devclass	,
		0	,
		0
	)

g_audio_attach()

static int g_audio_attach ( device_t  dev )

static

Definition at line 289 of file g_audio.c.

References usbd_lookup_info::bIfaceIndex, dev, usb_attach_arg::device, device_set_usb_desc(), DPRINTF, error, G_AUDIO_BUFSIZE, g_audio_config, g_audio_detach, G_AUDIO_FRAMES, G_AUDIO_ISOC0_RD, G_AUDIO_ISOC0_WR, G_AUDIO_ISOC1_RD, G_AUDIO_ISOC1_WR, G_AUDIO_MODE_SILENT, G_AUDIO_N_TRANSFER, g_audio_timeout_reset(), g_audio_watchdog_reset(), usb_attach_arg::info, g_audio_softc::sc_callout, g_audio_softc::sc_data_len, g_audio_softc::sc_mode, g_audio_softc::sc_mtx, g_audio_softc::sc_noise_rem, g_audio_softc::sc_watchdog, g_audio_softc::sc_xfer, usb_callout_init_mtx, usbd_errstr(), usbd_set_alt_interface_index(), usbd_set_parent_iface(), usbd_transfer_setup(), and usbd_transfer_start().

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g_audio_detach()

static int g_audio_detach ( device_t  dev )

static

Definition at line 363 of file g_audio.c.

References dev, DPRINTF, G_AUDIO_N_TRANSFER, g_audio_softc::sc_callout, g_audio_softc::sc_mtx, g_audio_softc::sc_watchdog, g_audio_softc::sc_xfer, usb_callout_drain, usb_callout_stop, and usbd_transfer_unsetup().

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g_audio_handle_request()

static int g_audio_handle_request ( device_t  dev, const void *  preq, void **  pptr, uint16_t *  plen, uint16_t  offset, uint8_t *  pstate  )

static

Definition at line 542 of file g_audio.c.

References dev, offset, plen, pptr, pstate, req, g_audio_softc::sc_sample_rate, g_audio_softc::sc_volume_limit, g_audio_softc::sc_volume_setting, USETW, UT_READ_CLASS_INTERFACE, UT_WRITE_CLASS_ENDPOINT, and UT_WRITE_CLASS_INTERFACE.

g_audio_isoc_read_callback()

static void g_audio_isoc_read_callback ( struct usb_xfer *  xfer, usb_error_t  error  )

static

Definition at line 487 of file g_audio.c.

References DPRINTF, error, G_AUDIO_BUFSIZE, G_AUDIO_FRAMES, G_AUDIO_ISOC0_RD, G_AUDIO_ISOC0_WR, G_AUDIO_ISOC1_WR, g_audio_softc::sc_data_buf, g_audio_softc::sc_data_len, g_audio_softc::sc_throughput, g_audio_softc::sc_xfer, USB_ERR_CANCELLED, USB_GET_STATE, USB_ST_SETUP, USB_ST_TRANSFERRED, usbd_errstr(), usbd_transfer_start(), usbd_transfer_submit(), usbd_xfer_frame_len(), usbd_xfer_set_frame_data(), usbd_xfer_set_stall(), usbd_xfer_softc(), and usbd_xfer_status().

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g_audio_isoc_write_callback()

static void g_audio_isoc_write_callback ( struct usb_xfer *  xfer, usb_error_t  error  )

static

Definition at line 428 of file g_audio.c.

References DPRINTF, error, G_AUDIO_BUFSIZE, G_AUDIO_FRAMES, G_AUDIO_ISOC0_WR, g_audio_make_samples(), G_AUDIO_MODE_LOOP, G_AUDIO_MODE_PATTERN, g_audio_softc::sc_data_buf, g_audio_softc::sc_data_len, g_audio_softc::sc_mode, g_audio_softc::sc_throughput, g_audio_softc::sc_xfer, USB_ERR_CANCELLED, USB_GET_STATE, USB_ST_SETUP, USB_ST_TRANSFERRED, usbd_errstr(), usbd_xfer_set_frame_data(), usbd_xfer_set_stall(), usbd_xfer_softc(), and usbd_xfer_status().

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g_audio_make_samples()

static void g_audio_make_samples ( struct g_audio_softc *  sc, int16_t *  ptr, int  samples  )

static

Definition at line 407 of file g_audio.c.

References g_noise(), g_audio_softc::sc_pattern, g_audio_softc::sc_pattern_len, and g_audio_softc::sc_state.

Referenced by g_audio_isoc_write_callback().

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g_audio_probe()

static int g_audio_probe ( device_t  dev )

static

Definition at line 272 of file g_audio.c.

References usbd_lookup_info::bInterfaceClass, usbd_lookup_info::bInterfaceSubClass, dev, usb_attach_arg::info, UICLASS_AUDIO, UISUBCLASS_AUDIOCONTROL, usb_attach_arg::usb_mode, and USB_MODE_DEVICE.

g_audio_timeout()

static void g_audio_timeout ( void *  arg )

static

Definition at line 231 of file g_audio.c.

References G_AUDIO_ISOC0_WR, G_AUDIO_ISOC1_WR, G_AUDIO_MAX_STRLEN, g_audio_mode, G_AUDIO_MODE_LOOP, g_audio_pattern_data, g_audio_timeout_reset(), g_audio_softc::sc_mode, g_audio_softc::sc_pattern, g_audio_softc::sc_pattern_len, g_audio_softc::sc_xfer, and usbd_transfer_start().

Referenced by g_audio_timeout_reset().

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g_audio_timeout_reset()

static void g_audio_timeout_reset ( struct g_audio_softc *  sc )

static

Definition at line 214 of file g_audio.c.

References g_audio_pattern_interval, g_audio_timeout(), g_audio_softc::sc_callout, g_audio_softc::sc_tx_interval, usb_callout_reset, and USB_MS_TO_TICKS.

Referenced by g_audio_attach(), and g_audio_timeout().

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g_audio_watchdog()

static void g_audio_watchdog ( void *  arg )

static

Definition at line 257 of file g_audio.c.

References g_audio_throughput, g_audio_watchdog_reset(), and g_audio_softc::sc_throughput.

Referenced by g_audio_watchdog_reset().

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g_audio_watchdog_reset()

static void g_audio_watchdog_reset ( struct g_audio_softc *  sc )

static

Definition at line 251 of file g_audio.c.

References g_audio_watchdog(), g_audio_softc::sc_watchdog, and usb_callout_reset.

Referenced by g_audio_attach(), and g_audio_watchdog().

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g_noise()

static int32_t g_noise ( struct g_audio_softc *  sc )

static

Definition at line 385 of file g_audio.c.

References g_audio_softc::sc_noise_rem.

Referenced by g_audio_make_samples().

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MODULE_DEPEND()

MODULE_DEPEND	(	g_audio	,
		usb	,
		1	,
		1	,
		1
	)

SYSCTL_INT() [1/3]

SYSCTL_INT	(	_hw_usb_g_audio	,
		OID_AUTO	,
		mode	,
		CTLFLAG_RWTUN	,
		&	g_audio_mode,
		0	,
		"Mode selection"
	)

SYSCTL_INT() [2/3]

SYSCTL_INT	(	_hw_usb_g_audio	,
		OID_AUTO	,
		pattern_interval	,
		CTLFLAG_RWTUN	,
		&	g_audio_pattern_interval,
		0	,
		"Pattern interval in milliseconds"
	)

SYSCTL_INT() [3/3]

SYSCTL_INT	(	_hw_usb_g_audio	,
		OID_AUTO	,
		throughput	,
		CTLFLAG_RD	,
		&	g_audio_throughput,
		sizeof(g_audio_throughput)	,
		"Throughput in bytes per second"
	)

SYSCTL_NODE()

static SYSCTL_NODE ( _hw_usb  , OID_AUTO  , g_audio  , CTLFLAG_RW|  CTLFLAG_MPSAFE, 0  , "USB audio gadget"    )

static

SYSCTL_STRING()

SYSCTL_STRING	(	_hw_usb_g_audio	,
		OID_AUTO	,
		pattern	,
		CTLFLAG_RW	,
		&	g_audio_pattern_data,
		sizeof(g_audio_pattern_data)	,
		"Data pattern"
	)

Variable Documentation

g_audio_attach

device_attach_t g_audio_attach

static

Definition at line 130 of file g_audio.c.

g_audio_config

const struct usb_config g_audio_config[G_AUDIO_N_TRANSFER]

static

Definition at line 163 of file g_audio.c.

Referenced by g_audio_attach().

g_audio_detach

device_detach_t g_audio_detach

static

Definition at line 131 of file g_audio.c.

Referenced by g_audio_attach().

g_audio_devclass

devclass_t g_audio_devclass

static

Definition at line 137 of file g_audio.c.

g_audio_driver

driver_t g_audio_driver

static

Initial value:

= {
        .name = "g_audio",
        .methods = g_audio_methods,
        .size = sizeof(struct g_audio_softc),
}

Definition at line 154 of file g_audio.c.

g_audio_handle_request

usb_handle_request_t g_audio_handle_request

static

Definition at line 132 of file g_audio.c.

g_audio_isoc_read_callback

usb_callback_t g_audio_isoc_read_callback

static

Definition at line 134 of file g_audio.c.

g_audio_isoc_write_callback

usb_callback_t g_audio_isoc_write_callback

static

Definition at line 135 of file g_audio.c.

g_audio_methods

device_method_t g_audio_methods[]

static

Initial value:

= {
        
        DEVMETHOD(usb_handle_request, g_audio_handle_request),
 
        
        DEVMETHOD(device_probe, g_audio_probe),
        DEVMETHOD(device_attach, g_audio_attach),
        DEVMETHOD(device_detach, g_audio_detach),
 
        DEVMETHOD_END
}

Definition at line 142 of file g_audio.c.

g_audio_mode

int g_audio_mode = 0

static

Definition at line 109 of file g_audio.c.

Referenced by g_audio_timeout().

g_audio_pattern_data

char g_audio_pattern_data[G_AUDIO_MAX_STRLEN]

static

Definition at line 119 of file g_audio.c.

Referenced by g_audio_timeout().

g_audio_pattern_interval

int g_audio_pattern_interval = 1000

static

Definition at line 114 of file g_audio.c.

Referenced by g_audio_timeout_reset().

g_audio_probe

device_probe_t g_audio_probe

static

Definition at line 129 of file g_audio.c.

g_audio_throughput

int g_audio_throughput

static

Definition at line 124 of file g_audio.c.

Referenced by g_audio_watchdog().