drivers/media/usb/dvb-usb-v2/az6007.c

Source file repositories/reference/linux-study-clean/drivers/media/usb/dvb-usb-v2/az6007.c

File Facts

System
Linux kernel
Corpus path
drivers/media/usb/dvb-usb-v2/az6007.c
Extension
.c
Size
22582 bytes
Lines
993
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

struct az6007_device_state {
	struct mutex		mutex;
	struct mutex		ca_mutex;
	struct dvb_ca_en50221	ca;
	unsigned		warm:1;
	int			(*gate_ctrl) (struct dvb_frontend *, int);
	unsigned char		data[4096];
};

static struct drxk_config terratec_h7_drxk = {
	.adr = 0x29,
	.parallel_ts = true,
	.dynamic_clk = true,
	.single_master = true,
	.enable_merr_cfg = true,
	.no_i2c_bridge = false,
	.chunk_size = 64,
	.mpeg_out_clk_strength = 0x02,
	.qam_demod_parameter_count = 2,
	.microcode_name = "dvb-usb-terratec-h7-drxk.fw",
};

static struct drxk_config cablestar_hdci_drxk = {
	.adr = 0x29,
	.parallel_ts = true,
	.dynamic_clk = true,
	.single_master = true,
	.enable_merr_cfg = true,
	.no_i2c_bridge = false,
	.chunk_size = 64,
	.mpeg_out_clk_strength = 0x02,
	.qam_demod_parameter_count = 2,
	.microcode_name = "dvb-usb-technisat-cablestar-hdci-drxk.fw",
};

static int drxk_gate_ctrl(struct dvb_frontend *fe, int enable)
{
	struct az6007_device_state *st = fe_to_priv(fe);
	struct dvb_usb_adapter *adap = fe->sec_priv;
	int status = 0;

	pr_debug("%s: %s\n", __func__, enable ? "enable" : "disable");

	if (!adap || !st)
		return -EINVAL;

	if (enable)
		status = st->gate_ctrl(fe, 1);
	else
		status = st->gate_ctrl(fe, 0);

	return status;
}

static struct mt2063_config az6007_mt2063_config = {
	.tuner_address = 0x60,
	.refclock = 36125000,
};

static int __az6007_read(struct usb_device *udev, u8 req, u16 value,
			    u16 index, u8 *b, int blen)
{
	int ret;

	ret = usb_control_msg(udev,
			      usb_rcvctrlpipe(udev, 0),
			      req,
			      USB_TYPE_VENDOR | USB_DIR_IN,
			      value, index, b, blen, 5000);
	if (ret < 0) {
		pr_warn("usb read operation failed. (%d)\n", ret);
		return -EIO;
	}

	if (az6007_xfer_debug) {
		printk(KERN_DEBUG "az6007: IN  req: %02x, value: %04x, index: %04x\n",
		       req, value, index);
		print_hex_dump_bytes("az6007: payload: ",
				     DUMP_PREFIX_NONE, b, blen);
	}

	return ret;
}

static int az6007_read(struct dvb_usb_device *d, u8 req, u16 value,
			    u16 index, u8 *b, int blen)
{
	struct az6007_device_state *st = d->priv;
	int ret;

Annotation

Implementation Notes