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Commit 845f3505 authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
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[media] si2168: Silicon Labs Si2168 DVB-T/T2/C demod driver 



Silicon Labs Si2168 DVB-T/T2/C demod driver.
That driver version supports only DVB-T.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <m.chehab@samsung.com>
parent 930a8730

drivers/media/dvb-frontends/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -446,6 +446,13 @@ config DVB_RTL2832 
	help

	  Say Y when you want to support this frontend.



config DVB_SI2168

	tristate "Silicon Labs Si2168"

	depends on DVB_CORE && I2C && I2C_MUX

	default m if !MEDIA_SUBDRV_AUTOSELECT

	help

	  Say Y when you want to support this frontend.



comment "DVB-C (cable) frontends"

	depends on DVB_CORE

drivers/media/dvb-frontends/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -78,6 +78,7 @@ obj-$(CONFIG_DVB_AF9013) += af9013.o 
obj-$(CONFIG_DVB_CX24116) += cx24116.o

obj-$(CONFIG_DVB_CX24117) += cx24117.o

obj-$(CONFIG_DVB_SI21XX) += si21xx.o

obj-$(CONFIG_DVB_SI2168) += si2168.o

obj-$(CONFIG_DVB_STV0288) += stv0288.o

obj-$(CONFIG_DVB_STB6000) += stb6000.o

obj-$(CONFIG_DVB_S921) += s921.o

drivers/media/dvb-frontends/si2168.c

0 → 100644
+708 −0
Original line number Diff line number Diff line 
#include "si2168_priv.h"



static const struct dvb_frontend_ops si2168_ops;



/* execute firmware command */

static int si2168_cmd_execute(struct si2168 *s, struct si2168_cmd *cmd)

{

	int ret;

	unsigned long timeout;



	mutex_lock(&s->i2c_mutex);



	if (cmd->wlen) {

		/* write cmd and args for firmware */

		ret = i2c_master_send(s->client, cmd->args, cmd->wlen);

		if (ret < 0) {

			goto err_mutex_unlock;

		} else if (ret != cmd->wlen) {

			ret = -EREMOTEIO;

			goto err_mutex_unlock;

		}

	}



	if (cmd->rlen) {

		/* wait cmd execution terminate */

		#define TIMEOUT 50

		timeout = jiffies + msecs_to_jiffies(TIMEOUT);

		while (!time_after(jiffies, timeout)) {

			ret = i2c_master_recv(s->client, cmd->args, cmd->rlen);

			if (ret < 0) {

				goto err_mutex_unlock;

			} else if (ret != cmd->rlen) {

				ret = -EREMOTEIO;

				goto err_mutex_unlock;

			}



			/* firmware ready? */

			if ((cmd->args[0] >> 7) & 0x01)

				break;

		}



		dev_dbg(&s->client->dev, "%s: cmd execution took %d ms\n",

				__func__,

				jiffies_to_msecs(jiffies) -

				(jiffies_to_msecs(timeout) - TIMEOUT));



		if (!(cmd->args[0] >> 7) & 0x01) {

			ret = -ETIMEDOUT;

			goto err_mutex_unlock;

		}

	}



	ret = 0;



err_mutex_unlock:

	mutex_unlock(&s->i2c_mutex);

	if (ret)

		goto err;



	return 0;

err:

	dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;

}



static int si2168_read_status(struct dvb_frontend *fe, fe_status_t *status)

{

	struct si2168 *s = fe->demodulator_priv;

	int ret;

	struct si2168_cmd cmd;



	*status = 0;



	if (!s->active) {

		ret = -EAGAIN;

		goto err;

	}



	cmd.args[0] = 0xa0;

	cmd.args[1] = 0x01;

	cmd.wlen = 2;

	cmd.rlen = 13;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	/*

	 * Possible values seen, in order from strong signal to weak:

	 * 16 0001 0110 full lock

	 * 1e 0001 1110 partial lock

	 * 1a 0001 1010 partial lock

	 * 18 0001 1000 no lock

	 *

	 * [b3:b1] lock bits

	 * [b4] statistics ready? Set in a few secs after lock is gained.

	 */



	switch ((cmd.args[2] >> 0) & 0x0f) {

	case 0x0a:

		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER;

		break;

	case 0x0e:

		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI;

		break;

	case 0x06:

		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |

				FE_HAS_SYNC | FE_HAS_LOCK;

		break;

	}



	s->fe_status = *status;



	dev_dbg(&s->client->dev, "%s: status=%02x args=%*ph\n",

			__func__, *status, cmd.rlen, cmd.args);



	return 0;

err:

	dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;

}



static int si2168_set_frontend(struct dvb_frontend *fe)

{

	struct si2168 *s = fe->demodulator_priv;

	struct dtv_frontend_properties *c = &fe->dtv_property_cache;

	int ret;

	struct si2168_cmd cmd;

	u8 bandwidth;



	dev_dbg(&s->client->dev,

			"%s: delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%u\n",

			__func__, c->delivery_system, c->modulation,

			c->frequency, c->bandwidth_hz, c->symbol_rate,

			c->inversion);



	if (!s->active) {

		ret = -EAGAIN;

		goto err;

	}



	switch (c->bandwidth_hz) {

	case 5000000:

		bandwidth = 0x25;

		break;

	case 6000000:

		bandwidth = 0x26;

		break;

	case 7000000:

		bandwidth = 0x27;

		break;

	case 8000000:

		bandwidth = 0x28;

		break;

	default:

		ret = -EINVAL;

		goto err;

	}



	/* program tuner */

	if (fe->ops.tuner_ops.set_params) {

		ret = fe->ops.tuner_ops.set_params(fe);

		if (ret)

			goto err;

	}



	memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5);

	cmd.wlen = 5;

	cmd.rlen = 5;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6);

	cmd.wlen = 6;

	cmd.rlen = 3;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x51\x03", 2);

	cmd.wlen = 2;

	cmd.rlen = 12;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x12\x08\x04", 3);

	cmd.wlen = 3;

	cmd.rlen = 3;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x01\x04\x00\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x03\x10\x17\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x02\x10\x15\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x0b\x10\x88\x13", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6);

	cmd.args[4] = bandwidth;

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x04\x10\x15\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x05\x10\xa1\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x0d\x10\xd0\x02", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x01\x10\x00\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x18", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x15", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x04\x03\x00\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x03\x03\x00\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x08\x03\x00\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x07\x03\x01\x02", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x06\x03\x00\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x05\x03\x00\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x40", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x01\x10\x16\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6);

	cmd.wlen = 6;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	cmd.args[0] = 0x85;

	cmd.wlen = 1;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	s->delivery_system = c->delivery_system;



	return 0;

err:

	dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;

}



static int si2168_init(struct dvb_frontend *fe)

{

	struct si2168 *s = fe->demodulator_priv;

	int ret, len, remaining;

	const struct firmware *fw = NULL;

	u8 *fw_file = SI2168_FIRMWARE;

	const unsigned int i2c_wr_max = 8;

	struct si2168_cmd cmd;



	dev_dbg(&s->client->dev, "%s:\n", __func__);



	cmd.args[0] = 0x13;

	cmd.wlen = 1;

	cmd.rlen = 0;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	cmd.args[0] = 0xc0;

	cmd.args[1] = 0x12;

	cmd.args[2] = 0x00;

	cmd.args[3] = 0x0c;

	cmd.args[4] = 0x00;

	cmd.args[5] = 0x0d;

	cmd.args[6] = 0x16;

	cmd.args[7] = 0x00;

	cmd.args[8] = 0x00;

	cmd.args[9] = 0x00;

	cmd.args[10] = 0x00;

	cmd.args[11] = 0x00;

	cmd.args[12] = 0x00;

	cmd.wlen = 13;

	cmd.rlen = 0;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	cmd.args[0] = 0xc0;

	cmd.args[1] = 0x06;

	cmd.args[2] = 0x01;

	cmd.args[3] = 0x0f;

	cmd.args[4] = 0x00;

	cmd.args[5] = 0x20;

	cmd.args[6] = 0x20;

	cmd.args[7] = 0x01;

	cmd.wlen = 8;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	cmd.args[0] = 0x02;

	cmd.wlen = 1;

	cmd.rlen = 13;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	cmd.args[0] = 0x05;

	cmd.args[1] = 0x00;

	cmd.args[2] = 0xaa;

	cmd.args[3] = 0x4d;

	cmd.args[4] = 0x56;

	cmd.args[5] = 0x40;

	cmd.args[6] = 0x00;

	cmd.args[7] = 0x00;

	cmd.wlen = 8;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	/* cold state - try to download firmware */

	dev_info(&s->client->dev, "%s: found a '%s' in cold state\n",

			KBUILD_MODNAME, si2168_ops.info.name);



	/* request the firmware, this will block and timeout */

	ret = request_firmware(&fw, fw_file, &s->client->dev);

	if (ret) {

		dev_err(&s->client->dev, "%s: firmare file '%s' not found\n",

				KBUILD_MODNAME, fw_file);

		goto err;

	}



	dev_info(&s->client->dev, "%s: downloading firmware from file '%s'\n",

			KBUILD_MODNAME, fw_file);



	for (remaining = fw->size; remaining > 0; remaining -= i2c_wr_max) {

		len = remaining;

		if (len > i2c_wr_max)

			len = i2c_wr_max;



		memcpy(cmd.args, &fw->data[fw->size - remaining], len);

		cmd.wlen = len;

		cmd.rlen = 1;

		ret = si2168_cmd_execute(s, &cmd);

		if (ret) {

			dev_err(&s->client->dev,

					"%s: firmware download failed=%d\n",

					KBUILD_MODNAME, ret);

			goto err;

		}

	}



	release_firmware(fw);

	fw = NULL;



	cmd.args[0] = 0x01;

	cmd.args[1] = 0x01;

	cmd.wlen = 2;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	dev_info(&s->client->dev, "%s: found a '%s' in warm state\n",

			KBUILD_MODNAME, si2168_ops.info.name);



	s->active = true;



	return 0;

err:

	if (fw)

		release_firmware(fw);



	dev_dbg(&s->client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;

}



static int si2168_sleep(struct dvb_frontend *fe)

{

	struct si2168 *s = fe->demodulator_priv;



	dev_dbg(&s->client->dev, "%s:\n", __func__);



	s->active = false;



	return 0;

}



static int si2168_get_tune_settings(struct dvb_frontend *fe,

	struct dvb_frontend_tune_settings *s)

{

	s->min_delay_ms = 900;



	return 0;

}



/*

 * I2C gate logic

 * We must use unlocked i2c_transfer() here because I2C lock is already taken

 * by tuner driver.

 */

static int si2168_select(struct i2c_adapter *adap, void *mux_priv, u32 chan)

{

	struct si2168 *s = mux_priv;

	int ret;

	struct i2c_msg gate_open_msg = {

		.addr = s->client->addr,

		.flags = 0,

		.len = 3,

		.buf = "\xc0\x0d\x01",

	};



	mutex_lock(&s->i2c_mutex);



	/* open tuner I2C gate */

	ret = __i2c_transfer(s->client->adapter, &gate_open_msg, 1);

	if (ret != 1) {

		dev_warn(&s->client->dev, "%s: i2c write failed=%d\n",

				KBUILD_MODNAME, ret);

		if (ret >= 0)

			ret = -EREMOTEIO;

	} else {

		ret = 0;

	}



	return ret;

}



static int si2168_deselect(struct i2c_adapter *adap, void *mux_priv, u32 chan)

{

	struct si2168 *s = mux_priv;

	int ret;

	struct i2c_msg gate_close_msg = {

		.addr = s->client->addr,

		.flags = 0,

		.len = 3,

		.buf = "\xc0\x0d\x00",

	};



	/* close tuner I2C gate */

	ret = __i2c_transfer(s->client->adapter, &gate_close_msg, 1);

	if (ret != 1) {

		dev_warn(&s->client->dev, "%s: i2c write failed=%d\n",

				KBUILD_MODNAME, ret);

		if (ret >= 0)

			ret = -EREMOTEIO;

	} else {

		ret = 0;

	}



	mutex_unlock(&s->i2c_mutex);



	return ret;

}



static const struct dvb_frontend_ops si2168_ops = {

	.delsys = {SYS_DVBT},

	.info = {

		.name = "Silicon Labs Si2168",

		.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_QPSK |

			FE_CAN_QAM_16 |

			FE_CAN_QAM_32 |

			FE_CAN_QAM_64 |

			FE_CAN_QAM_128 |

			FE_CAN_QAM_256 |

			FE_CAN_QAM_AUTO |

			FE_CAN_TRANSMISSION_MODE_AUTO |

			FE_CAN_GUARD_INTERVAL_AUTO |

			FE_CAN_HIERARCHY_AUTO |

			FE_CAN_MUTE_TS |

			FE_CAN_2G_MODULATION

	},



	.get_tune_settings = si2168_get_tune_settings,



	.init = si2168_init,

	.sleep = si2168_sleep,



	.set_frontend = si2168_set_frontend,



	.read_status = si2168_read_status,

};



static int si2168_probe(struct i2c_client *client,

		const struct i2c_device_id *id)

{

	struct si2168_config *config = client->dev.platform_data;

	struct si2168 *s;

	int ret;

	struct si2168_cmd cmd;



	dev_dbg(&client->dev, "%s:\n", __func__);



	s = kzalloc(sizeof(struct si2168), GFP_KERNEL);

	if (!s) {

		ret = -ENOMEM;

		dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);

		goto err;

	}



	s->client = client;

	mutex_init(&s->i2c_mutex);



	/* check if the demod is there */

	cmd.wlen = 0;

	cmd.rlen = 1;

	ret = si2168_cmd_execute(s, &cmd);

	if (ret)

		goto err;



	/* create mux i2c adapter for tuner */

	s->adapter = i2c_add_mux_adapter(client->adapter, &client->dev, s,

			0, 0, 0, si2168_select, si2168_deselect);

	if (s->adapter == NULL)

		goto err;



	/* create dvb_frontend */

	memcpy(&s->fe.ops, &si2168_ops, sizeof(struct dvb_frontend_ops));

	s->fe.demodulator_priv = s;



	*config->i2c_adapter = s->adapter;

	*config->fe = &s->fe;



	i2c_set_clientdata(client, s);



	dev_info(&s->client->dev,

			"%s: Silicon Labs Si2168 successfully attached\n",

			KBUILD_MODNAME);

	return 0;

err:

	kfree(s);

	dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret);

	return ret;

}



static int si2168_remove(struct i2c_client *client)

{

	struct si2168 *s = i2c_get_clientdata(client);



	dev_dbg(&client->dev, "%s:\n", __func__);



	i2c_del_mux_adapter(s->adapter);



	s->fe.ops.release = NULL;

	s->fe.demodulator_priv = NULL;



	kfree(s);



	return 0;

}



static const struct i2c_device_id si2168_id[] = {

	{"si2168", 0},

	{}

};

MODULE_DEVICE_TABLE(i2c, si2168_id);



static struct i2c_driver si2168_driver = {

	.driver = {

		.owner	= THIS_MODULE,

		.name	= "si2168",

	},

	.probe		= si2168_probe,

	.remove		= si2168_remove,

	.id_table	= si2168_id,

};



module_i2c_driver(si2168_driver);



MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");

MODULE_DESCRIPTION("Silicon Labs Si2168 DVB-T/T2/C demodulator driver");

MODULE_LICENSE("GPL");

MODULE_FIRMWARE(SI2168_FIRMWARE);

drivers/media/dvb-frontends/si2168.h

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#ifndef SI2168_H

#define SI2168_H



#include <linux/dvb/frontend.h>

/*

 * I2C address

 * 0x64

 */

struct si2168_config {

	/*

	 * frontend

	 * returned by driver

	 */

	struct dvb_frontend **fe;



	/*

	 * tuner I2C adapter

	 * returned by driver

	 */

	struct i2c_adapter **i2c_adapter;

};



#endif

drivers/media/dvb-frontends/si2168_priv.h

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#ifndef SI2168_PRIV_H

#define SI2168_PRIV_H



#include "si2168.h"

#include "dvb_frontend.h"

#include <linux/firmware.h>

#include <linux/i2c-mux.h>



#define SI2168_FIRMWARE "dvb-demod-si2168-01.fw"



/* state struct */

struct si2168 {

	struct i2c_client *client;

	struct i2c_adapter *adapter;

	struct mutex i2c_mutex;

	struct dvb_frontend fe;

	fe_delivery_system_t delivery_system;

	fe_status_t fe_status;

	bool active;

};



/* firmare command struct */

#define SI2157_ARGLEN      30

struct si2168_cmd {

	u8 args[SI2157_ARGLEN];

	unsigned wlen;

	unsigned rlen;

};



#endif