drivers/media/usb/dvb-usb-v2/au6610.c

Source file repositories/reference/linux-study-clean/drivers/media/usb/dvb-usb-v2/au6610.c

File Facts

System
Linux kernel
Corpus path
drivers/media/usb/dvb-usb-v2/au6610.c
Extension
.c
Size
4554 bytes
Lines
201
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
			if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
					   msg[i].len, msg[i+1].buf,
					   msg[i+1].len) < 0)
				break;
			i++;
		} else if (au6610_i2c_msg(d, msg[i].addr, msg[i].buf,
					       msg[i].len, NULL, 0) < 0)
				break;
	}

	mutex_unlock(&d->i2c_mutex);
	return i;
}


static u32 au6610_i2c_func(struct i2c_adapter *adapter)
{
	return I2C_FUNC_I2C;
}

static const struct i2c_algorithm au6610_i2c_algo = {
	.master_xfer   = au6610_i2c_xfer,
	.functionality = au6610_i2c_func,
};

/* Callbacks for DVB USB */
static struct zl10353_config au6610_zl10353_config = {
	.demod_address = 0x0f,
	.no_tuner = 1,
	.parallel_ts = 1,
};

static int au6610_zl10353_frontend_attach(struct dvb_usb_adapter *adap)
{
	adap->fe[0] = dvb_attach(zl10353_attach, &au6610_zl10353_config,
			&adap_to_d(adap)->i2c_adap);
	if (adap->fe[0] == NULL)
		return -ENODEV;

	return 0;
}

static struct qt1010_config au6610_qt1010_config = {
	.i2c_address = 0x62
};

static int au6610_qt1010_tuner_attach(struct dvb_usb_adapter *adap)
{
	return dvb_attach(qt1010_attach, adap->fe[0],
			&adap_to_d(adap)->i2c_adap,
			&au6610_qt1010_config) == NULL ? -ENODEV : 0;
}

static int au6610_init(struct dvb_usb_device *d)
{
	/* TODO: this functionality belongs likely to the streaming control */
	/* bInterfaceNumber 0, bAlternateSetting 5 */
	return usb_set_interface(d->udev, 0, 5);
}

static struct dvb_usb_device_properties au6610_props = {
	.driver_name = KBUILD_MODNAME,
	.owner = THIS_MODULE,
	.adapter_nr = adapter_nr,

	.i2c_algo = &au6610_i2c_algo,
	.frontend_attach = au6610_zl10353_frontend_attach,
	.tuner_attach = au6610_qt1010_tuner_attach,
	.init = au6610_init,

	.num_adapters = 1,
	.adapter = {
		{
			.stream = DVB_USB_STREAM_ISOC(0x82, 5, 40, 942, 1),
		},
	},
};

static const struct usb_device_id au6610_id_table[] = {
	{ DVB_USB_DEVICE(USB_VID_ALCOR_MICRO, USB_PID_SIGMATEK_DVB_110,
		&au6610_props, "Sigmatek DVB-110", NULL) },
	{ }
};
MODULE_DEVICE_TABLE(usb, au6610_id_table);

static struct usb_driver au6610_driver = {
	.name = KBUILD_MODNAME,
	.id_table = au6610_id_table,
	.probe = dvb_usbv2_probe,

Annotation

Implementation Notes