drivers/media/i2c/msp3400-kthreads.c

Source file repositories/reference/linux-study-clean/drivers/media/i2c/msp3400-kthreads.c

File Facts

System
Linux kernel
Corpus path
drivers/media/i2c/msp3400-kthreads.c
Extension
.c
Size
33510 bytes
Lines
1158
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 msp3400c_carrier_detect {
	int   cdo;
	char *name;
};

static struct msp3400c_carrier_detect msp3400c_carrier_detect_main[] = {
	/* main carrier */
	{ MSP_CARRIER(4.5),        "4.5   NTSC"                   },
	{ MSP_CARRIER(5.5),        "5.5   PAL B/G"                },
	{ MSP_CARRIER(6.0),        "6.0   PAL I"                  },
	{ MSP_CARRIER(6.5),        "6.5   PAL D/K + SAT + SECAM"  }
};

static struct msp3400c_carrier_detect msp3400c_carrier_detect_55[] = {
	/* PAL B/G */
	{ MSP_CARRIER(5.7421875),  "5.742 PAL B/G FM-stereo"     },
	{ MSP_CARRIER(5.85),       "5.85  PAL B/G NICAM"         }
};

static struct msp3400c_carrier_detect msp3400c_carrier_detect_65[] = {
	/* PAL SAT / SECAM */
	{ MSP_CARRIER(5.85),       "5.85  PAL D/K + SECAM NICAM" },
	{ MSP_CARRIER(6.2578125),  "6.25  PAL D/K1 FM-stereo" },
	{ MSP_CARRIER(6.7421875),  "6.74  PAL D/K2 FM-stereo" },
	{ MSP_CARRIER(7.02),       "7.02  PAL SAT FM-stereo s/b" },
	{ MSP_CARRIER(7.20),       "7.20  PAL SAT FM-stereo s"   },
	{ MSP_CARRIER(7.38),       "7.38  PAL SAT FM-stereo b"   },
};

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

const char *msp_standard_std_name(int std)
{
	int i;

	for (i = 0; msp_stdlist[i].name != NULL; i++)
		if (msp_stdlist[i].retval == std)
			return msp_stdlist[i].name;
	return "unknown";
}

static v4l2_std_id msp_standard_std(int std)
{
	int i;

	for (i = 0; msp_stdlist[i].name != NULL; i++)
		if (msp_stdlist[i].retval == std)
			return msp_stdlist[i].std;
	return V4L2_STD_ALL;
}

static void msp_set_source(struct i2c_client *client, u16 src)
{
	struct msp_state *state = to_state(i2c_get_clientdata(client));

	if (msp_dolby) {
		msp_write_dsp(client, 0x0008, 0x0520); /* I2S1 */
		msp_write_dsp(client, 0x0009, 0x0620); /* I2S2 */
	} else {
		msp_write_dsp(client, 0x0008, src);
		msp_write_dsp(client, 0x0009, src);
	}
	msp_write_dsp(client, 0x000a, src);
	msp_write_dsp(client, 0x000b, src);
	msp_write_dsp(client, 0x000c, src);
	if (state->has_scart2_out)
		msp_write_dsp(client, 0x0041, src);
}

void msp3400c_set_carrier(struct i2c_client *client, int cdo1, int cdo2)
{
	msp_write_dem(client, 0x0093, cdo1 & 0xfff);
	msp_write_dem(client, 0x009b, cdo1 >> 12);
	msp_write_dem(client, 0x00a3, cdo2 & 0xfff);
	msp_write_dem(client, 0x00ab, cdo2 >> 12);
	msp_write_dem(client, 0x0056, 0); /* LOAD_REG_1/2 */
}

void msp3400c_set_mode(struct i2c_client *client, int mode)
{
	struct msp_state *state = to_state(i2c_get_clientdata(client));
	struct msp3400c_init_data_dem *data = &msp3400c_init_data[mode];
	int tuner = (state->route_in >> 3) & 1;
	int i;

	dev_dbg_lvl(&client->dev, 1, msp_debug, "set_mode: %d\n", mode);
	state->mode = mode;
	state->rxsubchans = V4L2_TUNER_SUB_MONO;

	msp_write_dem(client, 0x00bb, data->ad_cv | (tuner ? 0x100 : 0));

Annotation

Implementation Notes