or51211.c

linux内核源码

}

static int or51211_read_snr(struct dvb_frontend* fe, u16* snr)
{
	struct or51211_state* state = fe->demodulator_priv;
	u8 rec_buf[2];
	u8 snd_buf[3];

	/* SNR after Equalizer */
	snd_buf[0] = 0x04;
	snd_buf[1] = 0x00;
	snd_buf[2] = 0x04;

	if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
		printk(KERN_WARNING "%s: error writing snr reg\n",
		       __FUNCTION__);
		return -1;
	}
	if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
		printk(KERN_WARNING "%s: read_status read error\n",
		       __FUNCTION__);
		return -1;
	}

	state->snr = calculate_snr(rec_buf[0], 89599047);
	*snr = (state->snr) >> 16;

	dprintk("%s: noise = 0x%02x, snr = %d.%02d dB\n", __FUNCTION__, rec_buf[0],
		state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16);

	return 0;
}

static int or51211_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
	/* Calculate Strength from SNR up to 35dB */
	/* Even though the SNR can go higher than 35dB, there is some comfort */
	/* factor in having a range of strong signals that can show at 100%   */
	struct or51211_state* state = (struct or51211_state*)fe->demodulator_priv;
	u16 snr;
	int ret;

	ret = fe->ops.read_snr(fe, &snr);
	if (ret != 0)
		return ret;
	/* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
	/* scale the range 0 - 35*2^24 into 0 - 65535 */
	if (state->snr >= 8960 * 0x10000)
		*strength = 0xffff;
	else
		*strength = state->snr / 8960;

	return 0;
}

static int or51211_read_ber(struct dvb_frontend* fe, u32* ber)
{
	*ber = -ENOSYS;
	return 0;
}

static int or51211_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
	*ucblocks = -ENOSYS;
	return 0;
}

static int or51211_sleep(struct dvb_frontend* fe)
{
	return 0;
}

static int or51211_init(struct dvb_frontend* fe)
{
	struct or51211_state* state = fe->demodulator_priv;
	const struct or51211_config* config = state->config;
	const struct firmware* fw;
	unsigned char get_ver_buf[] = {0x04,0x00,0x30,0x00,0x00};
	unsigned char rec_buf[14];
	int ret,i;

	if (!state->initialized) {
		/* Request the firmware, this will block until it uploads */
		printk(KERN_INFO "or51211: Waiting for firmware upload "
		       "(%s)...\n", OR51211_DEFAULT_FIRMWARE);
		ret = config->request_firmware(fe, &fw,
					       OR51211_DEFAULT_FIRMWARE);
		printk(KERN_INFO "or51211:Got Hotplug firmware\n");
		if (ret) {
			printk(KERN_WARNING "or51211: No firmware uploaded "
			       "(timeout or file not found?)\n");
			return ret;
		}

		ret = or51211_load_firmware(fe, fw);
		release_firmware(fw);
		if (ret) {
			printk(KERN_WARNING "or51211: Writing firmware to "
			       "device failed!\n");
			return ret;
		}
		printk(KERN_INFO "or51211: Firmware upload complete.\n");

		/* Set operation mode in Receiver 1 register;
		 * type 1:
		 * data 0x50h  Automatic sets receiver channel conditions
		 *             Automatic NTSC rejection filter
		 *             Enable  MPEG serial data output
		 *             MPEG2tr
		 *             High tuner phase noise
		 *             normal +/-150kHz Carrier acquisition range
		 */
		if (i2c_writebytes(state,state->config->demod_address,
				   cmd_buf,3)) {
			printk(KERN_WARNING "or51211: Load DVR Error 5\n");
			return -1;
		}

		/* Read back ucode version to besure we loaded correctly */
		/* and are really up and running */
		rec_buf[0] = 0x04;
		rec_buf[1] = 0x00;
		rec_buf[2] = 0x03;
		rec_buf[3] = 0x00;
		msleep(30);
		if (i2c_writebytes(state,state->config->demod_address,
				   rec_buf,3)) {
			printk(KERN_WARNING "or51211: Load DVR Error A\n");
			return -1;
		}
		msleep(3);
		if (i2c_readbytes(state,state->config->demod_address,
				  &rec_buf[10],2)) {
			printk(KERN_WARNING "or51211: Load DVR Error B\n");
			return -1;
		}

		rec_buf[0] = 0x04;
		rec_buf[1] = 0x00;
		rec_buf[2] = 0x01;
		rec_buf[3] = 0x00;
		msleep(20);
		if (i2c_writebytes(state,state->config->demod_address,
				   rec_buf,3)) {
			printk(KERN_WARNING "or51211: Load DVR Error C\n");
			return -1;
		}
		msleep(3);
		if (i2c_readbytes(state,state->config->demod_address,
				  &rec_buf[12],2)) {
			printk(KERN_WARNING "or51211: Load DVR Error D\n");
			return -1;
		}

		for (i = 0; i < 8; i++)
			rec_buf[i]=0xed;

		for (i = 0; i < 5; i++) {
			msleep(30);
			get_ver_buf[4] = i+1;
			if (i2c_writebytes(state,state->config->demod_address,
					   get_ver_buf,5)) {
				printk(KERN_WARNING "or51211:Load DVR Error 6"
				       " - %d\n",i);
				return -1;
			}
			msleep(3);

			if (i2c_readbytes(state,state->config->demod_address,
					  &rec_buf[i*2],2)) {
				printk(KERN_WARNING "or51211:Load DVR Error 7"
				       " - %d\n",i);
				return -1;
			}
			/* If we didn't receive the right index, try again */
			if ((int)rec_buf[i*2+1]!=i+1){
			  i--;
			}
		}
		dprintk("read_fwbits %x %x %x %x %x %x %x %x %x %x\n",
			rec_buf[0], rec_buf[1], rec_buf[2], rec_buf[3],
			rec_buf[4], rec_buf[5], rec_buf[6], rec_buf[7],
			rec_buf[8], rec_buf[9]);

		printk(KERN_INFO "or51211: ver TU%02x%02x%02x VSB mode %02x"
		       " Status %02x\n",
		       rec_buf[2], rec_buf[4],rec_buf[6],
		       rec_buf[12],rec_buf[10]);

		rec_buf[0] = 0x04;
		rec_buf[1] = 0x00;
		rec_buf[2] = 0x03;
		rec_buf[3] = 0x00;
		msleep(20);
		if (i2c_writebytes(state,state->config->demod_address,
				   rec_buf,3)) {
			printk(KERN_WARNING "or51211: Load DVR Error 8\n");
			return -1;
		}
		msleep(20);
		if (i2c_readbytes(state,state->config->demod_address,
				  &rec_buf[8],2)) {
			printk(KERN_WARNING "or51211: Load DVR Error 9\n");
			return -1;
		}
		state->initialized = 1;
	}

	return 0;
}

static int or51211_get_tune_settings(struct dvb_frontend* fe,
				     struct dvb_frontend_tune_settings* fesettings)
{
	fesettings->min_delay_ms = 500;
	fesettings->step_size = 0;
	fesettings->max_drift = 0;
	return 0;
}

static void or51211_release(struct dvb_frontend* fe)
{
	struct or51211_state* state = fe->demodulator_priv;
	state->config->sleep(fe);
	kfree(state);
}

static struct dvb_frontend_ops or51211_ops;

struct dvb_frontend* or51211_attach(const struct or51211_config* config,
				    struct i2c_adapter* i2c)
{
	struct or51211_state* state = NULL;

	/* Allocate memory for the internal state */
	state = kmalloc(sizeof(struct or51211_state), GFP_KERNEL);
	if (state == NULL)
		goto error;

	/* Setup the state */
	state->config = config;
	state->i2c = i2c;
	state->initialized = 0;
	state->current_frequency = 0;

	/* Create dvb_frontend */
	memcpy(&state->frontend.ops, &or51211_ops, sizeof(struct dvb_frontend_ops));
	state->frontend.demodulator_priv = state;
	return &state->frontend;

error:
	kfree(state);
	return NULL;
}

static struct dvb_frontend_ops or51211_ops = {

	.info = {
		.name               = "Oren OR51211 VSB Frontend",
		.type               = FE_ATSC,
		.frequency_min      = 44000000,
		.frequency_max      = 958000000,
		.frequency_stepsize = 166666,
		.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
			FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
			FE_CAN_8VSB
	},

	.release = or51211_release,

	.init = or51211_init,
	.sleep = or51211_sleep,

	.set_frontend = or51211_set_parameters,
	.get_tune_settings = or51211_get_tune_settings,

	.read_status = or51211_read_status,
	.read_ber = or51211_read_ber,
	.read_signal_strength = or51211_read_signal_strength,
	.read_snr = or51211_read_snr,
	.read_ucblocks = or51211_read_ucblocks,
};

module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");

MODULE_DESCRIPTION("Oren OR51211 VSB [pcHDTV HD-2000] Demodulator Driver");
MODULE_AUTHOR("Kirk Lapray");
MODULE_LICENSE("GPL");

EXPORT_SYMBOL(or51211_attach);