drivers/media/tuners/tda827x.c

Source file repositories/reference/linux-study-clean/drivers/media/tuners/tda827x.c

File Facts

System
Linux kernel
Corpus path
drivers/media/tuners/tda827x.c
Extension
.c
Size
25854 bytes
Lines
896
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: exported/initcall integration point
Status
integration 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 tda827x_priv {
	int i2c_addr;
	struct i2c_adapter *i2c_adap;
	struct tda827x_config *cfg;

	unsigned int sgIF;
	unsigned char lpsel;

	u32 frequency;
	u32 bandwidth;
};

static void tda827x_set_std(struct dvb_frontend *fe,
			    struct analog_parameters *params)
{
	struct tda827x_priv *priv = fe->tuner_priv;
	char *mode;

	priv->lpsel = 0;
	if (params->std & V4L2_STD_MN) {
		priv->sgIF = 92;
		priv->lpsel = 1;
		mode = "MN";
	} else if (params->std & V4L2_STD_B) {
		priv->sgIF = 108;
		mode = "B";
	} else if (params->std & V4L2_STD_GH) {
		priv->sgIF = 124;
		mode = "GH";
	} else if (params->std & V4L2_STD_PAL_I) {
		priv->sgIF = 124;
		mode = "I";
	} else if (params->std & V4L2_STD_DK) {
		priv->sgIF = 124;
		mode = "DK";
	} else if (params->std & V4L2_STD_SECAM_L) {
		priv->sgIF = 124;
		mode = "L";
	} else if (params->std & V4L2_STD_SECAM_LC) {
		priv->sgIF = 20;
		mode = "LC";
	} else {
		priv->sgIF = 124;
		mode = "xx";
	}

	if (params->mode == V4L2_TUNER_RADIO) {
		priv->sgIF = 88; /* if frequency is 5.5 MHz */
		dprintk("setting tda827x to radio FM\n");
	} else
		dprintk("setting tda827x to system %s\n", mode);
}


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

struct tda827x_data {
	u32 lomax;
	u8  spd;
	u8  bs;
	u8  bp;
	u8  cp;
	u8  gc3;
	u8 div1p5;
};

static const struct tda827x_data tda827x_table[] = {
	{ .lomax =  62000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1},
	{ .lomax =  66000000, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1},
	{ .lomax =  76000000, .spd = 3, .bs = 1, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0},
	{ .lomax =  84000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0},
	{ .lomax =  93000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax =  98000000, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 109000000, .spd = 3, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 123000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 133000000, .spd = 2, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 151000000, .spd = 2, .bs = 1, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 154000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 181000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 0, .div1p5 = 0},
	{ .lomax = 185000000, .spd = 2, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 217000000, .spd = 2, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 244000000, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 265000000, .spd = 1, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 302000000, .spd = 1, .bs = 1, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 324000000, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 370000000, .spd = 1, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 454000000, .spd = 1, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 493000000, .spd = 0, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 530000000, .spd = 0, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 554000000, .spd = 0, .bs = 1, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},

Annotation

Implementation Notes