[mirror_ubuntu-jammy-kernel.git] / drivers / media / tuners / si2157.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver
 *
 * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
 */

#include "si2157_priv.h"

static const struct dvb_tuner_ops si2157_ops;

/* execute firmware command */
static int si2157_cmd_execute(struct i2c_client *client, struct si2157_cmd *cmd)
{
	struct si2157_dev *dev = i2c_get_clientdata(client);
	int ret;
	unsigned long timeout;

	mutex_lock(&dev->i2c_mutex);

	if (cmd->wlen) {
		/* write cmd and args for firmware */
		ret = i2c_master_send(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 80
		timeout = jiffies + msecs_to_jiffies(TIMEOUT);
		while (!time_after(jiffies, timeout)) {
			ret = i2c_master_recv(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(&client->dev, "cmd execution took %d ms\n",
				jiffies_to_msecs(jiffies) -
				(jiffies_to_msecs(timeout) - TIMEOUT));

		if (!((cmd->args[0] >> 7) & 0x01)) {
			ret = -ETIMEDOUT;
			goto err_mutex_unlock;
		}
	}

	mutex_unlock(&dev->i2c_mutex);
	return 0;

err_mutex_unlock:
	mutex_unlock(&dev->i2c_mutex);
	dev_dbg(&client->dev, "failed=%d\n", ret);
	return ret;
}

static int si2157_init(struct dvb_frontend *fe)
{
	struct i2c_client *client = fe->tuner_priv;
	struct si2157_dev *dev = i2c_get_clientdata(client);
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	int ret, len, remaining;
	struct si2157_cmd cmd;
	const struct firmware *fw;
	const char *fw_name;
	unsigned int uitmp, chip_id;

	dev_dbg(&client->dev, "\n");

	/* Returned IF frequency is garbage when firmware is not running */
	memcpy(cmd.args, "\x15\x00\x06\x07", 4);
	cmd.wlen = 4;
	cmd.rlen = 4;
	ret = si2157_cmd_execute(client, &cmd);
	if (ret)
		goto err;

	uitmp = cmd.args[2] << 0 | cmd.args[3] << 8;
	dev_dbg(&client->dev, "if_frequency kHz=%u\n", uitmp);

	if (uitmp == dev->if_frequency / 1000)
		goto warm;

	/* power up */
	if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
		memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
		cmd.wlen = 9;
	} else if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
		memcpy(cmd.args, "\xc0\x00\x0d\x0e\x00\x01\x01\x01\x01\x03", 10);
		cmd.wlen = 10;
	} else {
		memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
		cmd.wlen = 15;
	}
	cmd.rlen = 1;
	ret = si2157_cmd_execute(client, &cmd);
	if (ret)
		goto err;

	/* Si2141 needs a second command before it answers the revision query */
	if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
		memcpy(cmd.args, "\xc0\x08\x01\x02\x00\x00\x01", 7);
		cmd.wlen = 7;
		ret = si2157_cmd_execute(client, &cmd);
		if (ret)
			goto err;
	}

	/* query chip revision */
	memcpy(cmd.args, "\x02", 1);
	cmd.wlen = 1;
	cmd.rlen = 13;
	ret = si2157_cmd_execute(client, &cmd);
	if (ret)
		goto err;

	chip_id = cmd.args[1] << 24 | cmd.args[2] << 16 | cmd.args[3] << 8 |
			cmd.args[4] << 0;

	#define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
	#define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0)
	#define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
	#define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
	#define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0)
	#define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0)

	switch (chip_id) {
	case SI2158_A20:
	case SI2148_A20:
		fw_name = SI2158_A20_FIRMWARE;
		break;
	case SI2141_A10:
		fw_name = SI2141_A10_FIRMWARE;
		break;
	case SI2157_A30:
	case SI2147_A30:
	case SI2146_A10:
		fw_name = NULL;
		break;
	default:
		dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
				cmd.args[2], cmd.args[1],
				cmd.args[3], cmd.args[4]);
		ret = -EINVAL;
		goto err;
	}

	dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
			cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);

	if (fw_name == NULL)
		goto skip_fw_download;

	/* request the firmware, this will block and timeout */
	ret = request_firmware(&fw, fw_name, &client->dev);
	if (ret) {
		dev_err(&client->dev, "firmware file '%s' not found\n",
				fw_name);
		goto err;
	}

	/* firmware should be n chunks of 17 bytes */
	if (fw->size % 17 != 0) {
		dev_err(&client->dev, "firmware file '%s' is invalid\n",
				fw_name);
		ret = -EINVAL;
		goto err_release_firmware;
	}

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

	for (remaining = fw->size; remaining > 0; remaining -= 17) {
		len = fw->data[fw->size - remaining];
		if (len > SI2157_ARGLEN) {
			dev_err(&client->dev, "Bad firmware length\n");
			ret = -EINVAL;
			goto err_release_firmware;
		}
		memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
		cmd.wlen = len;
		cmd.rlen = 1;
		ret = si2157_cmd_execute(client, &cmd);
		if (ret) {
			dev_err(&client->dev, "firmware download failed %d\n",
					ret);
			goto err_release_firmware;
		}
	}

	release_firmware(fw);

skip_fw_download:
	/* reboot the tuner with new firmware? */
	memcpy(cmd.args, "\x01\x01", 2);
	cmd.wlen = 2;
	cmd.rlen = 1;
	ret = si2157_cmd_execute(client, &cmd);
	if (ret)
		goto err;

	/* query firmware version */
	memcpy(cmd.args, "\x11", 1);
	cmd.wlen = 1;
	cmd.rlen = 10;
	ret = si2157_cmd_execute(client, &cmd);
	if (ret)
		goto err;

	dev_info(&client->dev, "firmware version: %c.%c.%d\n",
			cmd.args[6], cmd.args[7], cmd.args[8]);
warm:
	/* init statistics in order signal app which are supported */
	c->strength.len = 1;
	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
	/* start statistics polling */
	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000));

	dev->active = true;
	return 0;
err_release_firmware:
	release_firmware(fw);
err:
	dev_dbg(&client->dev, "failed=%d\n", ret);
	return ret;
}

static int si2157_sleep(struct dvb_frontend *fe)
{
	struct i2c_client *client = fe->tuner_priv;
	struct si2157_dev *dev = i2c_get_clientdata(client);
	int ret;
	struct si2157_cmd cmd;

	dev_dbg(&client->dev, "\n");

	dev->active = false;

	/* stop statistics polling */
	cancel_delayed_work_sync(&dev->stat_work);

	/* standby */
	memcpy(cmd.args, "\x16\x00", 2);
	cmd.wlen = 2;
	cmd.rlen = 1;
	ret = si2157_cmd_execute(client, &cmd);
	if (ret)
		goto err;

	return 0;
err:
	dev_dbg(&client->dev, "failed=%d\n", ret);
	return ret;
}

static int si2157_set_params(struct dvb_frontend *fe)
{
	struct i2c_client *client = fe->tuner_priv;
	struct si2157_dev *dev = i2c_get_clientdata(client);
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	int ret;
	struct si2157_cmd cmd;
	u8 bandwidth, delivery_system;
	u32 if_frequency = 5000000;

	dev_dbg(&client->dev,
			"delivery_system=%d frequency=%u bandwidth_hz=%u\n",
			c->delivery_system, c->frequency, c->bandwidth_hz);

	if (!dev->active) {
		ret = -EAGAIN;
		goto err;
	}

	if (c->bandwidth_hz <= 6000000)
		bandwidth = 0x06;
	else if (c->bandwidth_hz <= 7000000)
		bandwidth = 0x07;
	else if (c->bandwidth_hz <= 8000000)
		bandwidth = 0x08;
	else
		bandwidth = 0x0f;

	switch (c->delivery_system) {
	case SYS_ATSC:
			delivery_system = 0x00;
			if_frequency = 3250000;
			break;
	case SYS_DVBC_ANNEX_B:
			delivery_system = 0x10;
			if_frequency = 4000000;
			break;
	case SYS_DVBT:
	case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */
			delivery_system = 0x20;
			break;
	case SYS_DVBC_ANNEX_A:
			delivery_system = 0x30;
			break;
	default:
			ret = -EINVAL;
			goto err;
	}

	memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
	cmd.args[4] = delivery_system | bandwidth;
	if (dev->inversion)
		cmd.args[5] = 0x01;
	cmd.wlen = 6;
	cmd.rlen = 4;
	ret = si2157_cmd_execute(client, &cmd);
	if (ret)
		goto err;

	if (dev->chiptype == SI2157_CHIPTYPE_SI2146)
		memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
	else
		memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6);
	cmd.args[4] = dev->if_port;
	cmd.wlen = 6;
	cmd.rlen = 4;
	ret = si2157_cmd_execute(client, &cmd);
	if (ret)
		goto err;

	/* set if frequency if needed */
	if (if_frequency != dev->if_frequency) {
		memcpy(cmd.args, "\x14\x00\x06\x07", 4);
		cmd.args[4] = (if_frequency / 1000) & 0xff;
		cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
		cmd.wlen = 6;
		cmd.rlen = 4;
		ret = si2157_cmd_execute(client, &cmd);
		if (ret)
			goto err;

		dev->if_frequency = if_frequency;
	}

	/* set frequency */
	memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
	cmd.args[4] = (c->frequency >>  0) & 0xff;
	cmd.args[5] = (c->frequency >>  8) & 0xff;
	cmd.args[6] = (c->frequency >> 16) & 0xff;
	cmd.args[7] = (c->frequency >> 24) & 0xff;
	cmd.wlen = 8;
	cmd.rlen = 1;
	ret = si2157_cmd_execute(client, &cmd);
	if (ret)
		goto err;

	return 0;
err:
	dev_dbg(&client->dev, "failed=%d\n", ret);
	return ret;
}

static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct i2c_client *client = fe->tuner_priv;
	struct si2157_dev *dev = i2c_get_clientdata(client);

	*frequency = dev->if_frequency;
	return 0;
}

static const struct dvb_tuner_ops si2157_ops = {
	.info = {
		.name             = "Silicon Labs Si2141/Si2146/2147/2148/2157/2158",
		.frequency_min_hz =  42 * MHz,
		.frequency_max_hz = 870 * MHz,
	},

	.init = si2157_init,
	.sleep = si2157_sleep,
	.set_params = si2157_set_params,
	.get_if_frequency = si2157_get_if_frequency,
};

static void si2157_stat_work(struct work_struct *work)
{
	struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work);
	struct dvb_frontend *fe = dev->fe;
	struct i2c_client *client = fe->tuner_priv;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct si2157_cmd cmd;
	int ret;

	dev_dbg(&client->dev, "\n");

	memcpy(cmd.args, "\x42\x00", 2);
	cmd.wlen = 2;
	cmd.rlen = 12;
	ret = si2157_cmd_execute(client, &cmd);
	if (ret)
		goto err;

	c->strength.stat[0].scale = FE_SCALE_DECIBEL;
	c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000;

	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
	return;
err:
	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
	dev_dbg(&client->dev, "failed=%d\n", ret);
}

static int si2157_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct si2157_config *cfg = client->dev.platform_data;
	struct dvb_frontend *fe = cfg->fe;
	struct si2157_dev *dev;
	struct si2157_cmd cmd;
	int ret;

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev) {
		ret = -ENOMEM;
		dev_err(&client->dev, "kzalloc() failed\n");
		goto err;
	}

	i2c_set_clientdata(client, dev);
	dev->fe = cfg->fe;
	dev->inversion = cfg->inversion;
	dev->if_port = cfg->if_port;
	dev->chiptype = (u8)id->driver_data;
	dev->if_frequency = 5000000; /* default value of property 0x0706 */
	mutex_init(&dev->i2c_mutex);
	INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work);

	/* check if the tuner is there */
	cmd.wlen = 0;
	cmd.rlen = 1;
	ret = si2157_cmd_execute(client, &cmd);
	if (ret)
		goto err_kfree;

	memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
	fe->tuner_priv = client;

#ifdef CONFIG_MEDIA_CONTROLLER
	if (cfg->mdev) {
		dev->mdev = cfg->mdev;

		dev->ent.name = KBUILD_MODNAME;
		dev->ent.function = MEDIA_ENT_F_TUNER;

		dev->pad[SI2157_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
		dev->pad[SI2157_PAD_RF_INPUT].sig_type = PAD_SIGNAL_ANALOG;
		dev->pad[SI2157_PAD_VID_OUT].flags = MEDIA_PAD_FL_SOURCE;
		dev->pad[SI2157_PAD_VID_OUT].sig_type = PAD_SIGNAL_ANALOG;
		dev->pad[SI2157_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE;
		dev->pad[SI2157_PAD_AUD_OUT].sig_type = PAD_SIGNAL_AUDIO;

		ret = media_entity_pads_init(&dev->ent, SI2157_NUM_PADS,
					     &dev->pad[0]);

		if (ret)
			goto err_kfree;

		ret = media_device_register_entity(cfg->mdev, &dev->ent);
		if (ret) {
			media_entity_cleanup(&dev->ent);
			goto err_kfree;
		}
	}
#endif

	dev_info(&client->dev, "Silicon Labs %s successfully attached\n",
			dev->chiptype == SI2157_CHIPTYPE_SI2141 ?  "Si2141" :
			dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
			"Si2146" : "Si2147/2148/2157/2158");

	return 0;

err_kfree:
	kfree(dev);
err:
	dev_dbg(&client->dev, "failed=%d\n", ret);
	return ret;
}

static int si2157_remove(struct i2c_client *client)
{
	struct si2157_dev *dev = i2c_get_clientdata(client);
	struct dvb_frontend *fe = dev->fe;

	dev_dbg(&client->dev, "\n");

	/* stop statistics polling */
	cancel_delayed_work_sync(&dev->stat_work);

#ifdef CONFIG_MEDIA_CONTROLLER_DVB
	if (dev->mdev)
		media_device_unregister_entity(&dev->ent);
#endif

	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
	fe->tuner_priv = NULL;
	kfree(dev);

	return 0;
}

static const struct i2c_device_id si2157_id_table[] = {
	{"si2157", SI2157_CHIPTYPE_SI2157},
	{"si2146", SI2157_CHIPTYPE_SI2146},
	{"si2141", SI2157_CHIPTYPE_SI2141},
	{}
};
MODULE_DEVICE_TABLE(i2c, si2157_id_table);

static struct i2c_driver si2157_driver = {
	.driver = {
		.name		     = "si2157",
		.suppress_bind_attrs = true,
	},
	.probe		= si2157_probe,
	.remove		= si2157_remove,
	.id_table	= si2157_id_table,
};

module_i2c_driver(si2157_driver);

MODULE_DESCRIPTION("Silicon Labs Si2141/Si2146/2147/2148/2157/2158 silicon tuner driver");
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE(SI2158_A20_FIRMWARE);
MODULE_FIRMWARE(SI2141_A10_FIRMWARE);
Commit	Line	Data
c942fddf	1	// SPDX-License-Identifier: GPL-2.0-or-later
ba92ae0f	2	/*
297e14d5	3	* Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver
ba92ae0f AP	4	*
ba92ae0f AP	5	* Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
ba92ae0f AP	6	*/
ba92ae0f AP	7
930a8730 AP	8	#include "si2157_priv.h"
930a8730 AP	9
1b92373f OS	10	static const struct dvb_tuner_ops si2157_ops;
1b92373f OS	11
930a8730	12	/* execute firmware command */
8fe51725	13	static int si2157_cmd_execute(struct i2c_client client, struct si2157_cmd cmd)
930a8730	14	{
8fe51725	15	struct si2157_dev *dev = i2c_get_clientdata(client);
930a8730	16	int ret;
930a8730 AP	17	unsigned long timeout;
930a8730 AP	18
70f13ff0	19	mutex_lock(&dev->i2c_mutex);
930a8730	20
e6b4380f	21	if (cmd->wlen) {
930a8730	22	/* write cmd and args for firmware */
8fe51725	23	ret = i2c_master_send(client, cmd->args, cmd->wlen);
930a8730 AP	24	if (ret < 0) {
930a8730 AP	25	goto err_mutex_unlock;
e6b4380f	26	} else if (ret != cmd->wlen) {
930a8730 AP	27	ret = -EREMOTEIO;
	28	goto err_mutex_unlock;
	29	}
	30	}
	31
e6b4380f AP	32	if (cmd->rlen) {
	33	/* wait cmd execution terminate */
	34	#define TIMEOUT 80
	35	timeout = jiffies + msecs_to_jiffies(TIMEOUT);
	36	while (!time_after(jiffies, timeout)) {
8fe51725	37	ret = i2c_master_recv(client, cmd->args, cmd->rlen);
e6b4380f AP	38	if (ret < 0) {
	39	goto err_mutex_unlock;
	40	} else if (ret != cmd->rlen) {
	41	ret = -EREMOTEIO;
	42	goto err_mutex_unlock;
	43	}
	44
	45	/* firmware ready? */
	46	if ((cmd->args[0] >> 7) & 0x01)
	47	break;
930a8730 AP	48	}
930a8730 AP	49
8fe51725	50	dev_dbg(&client->dev, "cmd execution took %d ms\n",
e6b4380f AP	51	jiffies_to_msecs(jiffies) -
e6b4380f AP	52	(jiffies_to_msecs(timeout) - TIMEOUT));
930a8730	53
e6b4380f AP	54	if (!((cmd->args[0] >> 7) & 0x01)) {
	55	ret = -ETIMEDOUT;
	56	goto err_mutex_unlock;
	57	}
930a8730 AP	58	}
930a8730 AP	59
7cbf5d76 AP	60	mutex_unlock(&dev->i2c_mutex);
7cbf5d76 AP	61	return 0;
e6b4380f	62
930a8730	63	err_mutex_unlock:
70f13ff0	64	mutex_unlock(&dev->i2c_mutex);
8fe51725	65	dev_dbg(&client->dev, "failed=%d\n", ret);
930a8730 AP	66	return ret;
	67	}
	68
	69	static int si2157_init(struct dvb_frontend *fe)
	70	{
8fe51725 AP	71	struct i2c_client *client = fe->tuner_priv;
8fe51725 AP	72	struct si2157_dev *dev = i2c_get_clientdata(client);
2f1ea29f	73	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
7d6bc608	74	int ret, len, remaining;
b154121c	75	struct si2157_cmd cmd;
78dab40a	76	const struct firmware *fw;
08272db6	77	const char *fw_name;
297e14d5	78	unsigned int uitmp, chip_id;
930a8730	79
8fe51725	80	dev_dbg(&client->dev, "\n");
930a8730	81
78bab930 AP	82	/* Returned IF frequency is garbage when firmware is not running */
	83	memcpy(cmd.args, "\x15\x00\x06\x07", 4);
	84	cmd.wlen = 4;
	85	cmd.rlen = 4;
	86	ret = si2157_cmd_execute(client, &cmd);
	87	if (ret)
	88	goto err;
	89
	90	uitmp = cmd.args[2] << 0 \| cmd.args[3] << 8;
	91	dev_dbg(&client->dev, "if_frequency kHz=%u\n", uitmp);
	92
	93	if (uitmp == dev->if_frequency / 1000)
4cbf6ed9 OS	94	goto warm;
	95
	96	/* power up */
297e14d5	97	if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
073f3849 OS	98	memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
073f3849 OS	99	cmd.wlen = 9;
3a2824c7 SB	100	} else if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
	101	memcpy(cmd.args, "\xc0\x00\x0d\x0e\x00\x01\x01\x01\x01\x03", 10);
	102	cmd.wlen = 10;
297e14d5	103	} else {
073f3849 OS	104	memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
	105	cmd.wlen = 15;
	106	}
b154121c	107	cmd.rlen = 1;
8fe51725	108	ret = si2157_cmd_execute(client, &cmd);
b154121c OS	109	if (ret)
	110	goto err;
	111
3a2824c7 SB	112	/* Si2141 needs a second command before it answers the revision query */
	113	if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
	114	memcpy(cmd.args, "\xc0\x08\x01\x02\x00\x00\x01", 7);
	115	cmd.wlen = 7;
	116	ret = si2157_cmd_execute(client, &cmd);
	117	if (ret)
	118	goto err;
	119	}
	120
b154121c OS	121	/* query chip revision */
	122	memcpy(cmd.args, "\x02", 1);
	123	cmd.wlen = 1;
	124	cmd.rlen = 13;
8fe51725	125	ret = si2157_cmd_execute(client, &cmd);
b154121c OS	126	if (ret)
	127	goto err;
	128
7d6bc608 AP	129	chip_id = cmd.args[1] << 24 \| cmd.args[2] << 16 \| cmd.args[3] << 8 \|
	130	cmd.args[4] << 0;
	131
	132	#define SI2158_A20 ('A' << 24 \| 58 << 16 \| '2' << 8 \| '0' << 0)
17ad09f1	133	#define SI2148_A20 ('A' << 24 \| 48 << 16 \| '2' << 8 \| '0' << 0)
7d6bc608	134	#define SI2157_A30 ('A' << 24 \| 57 << 16 \| '3' << 8 \| '0' << 0)
d87a5058	135	#define SI2147_A30 ('A' << 24 \| 47 << 16 \| '3' << 8 \| '0' << 0)
073f3849	136	#define SI2146_A10 ('A' << 24 \| 46 << 16 \| '1' << 8 \| '0' << 0)
3a2824c7	137	#define SI2141_A10 ('A' << 24 \| 41 << 16 \| '1' << 8 \| '0' << 0)
7d6bc608 AP	138
	139	switch (chip_id) {
	140	case SI2158_A20:
17ad09f1	141	case SI2148_A20:
08272db6	142	fw_name = SI2158_A20_FIRMWARE;
7d6bc608	143	break;
3a2824c7 SB	144	case SI2141_A10:
	145	fw_name = SI2141_A10_FIRMWARE;
	146	break;
7d6bc608	147	case SI2157_A30:
d87a5058	148	case SI2147_A30:
073f3849	149	case SI2146_A10:
08272db6	150	fw_name = NULL;
6c372533	151	break;
7d6bc608	152	default:
8fe51725	153	dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
67d0113a	154	cmd.args[2], cmd.args[1],
7d6bc608 AP	155	cmd.args[3], cmd.args[4]);
	156	ret = -EINVAL;
	157	goto err;
	158	}
1b92373f	159
6c372533 AP	160	dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
	161	cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
	162
08272db6	163	if (fw_name == NULL)
6c372533	164	goto skip_fw_download;
1b92373f	165
7d6bc608	166	/* request the firmware, this will block and timeout */
08272db6	167	ret = request_firmware(&fw, fw_name, &client->dev);
7d6bc608	168	if (ret) {
8fe51725	169	dev_err(&client->dev, "firmware file '%s' not found\n",
08272db6	170	fw_name);
7d6bc608 AP	171	goto err;
7d6bc608 AP	172	}
1b92373f	173
7d6bc608 AP	174	/* firmware should be n chunks of 17 bytes */
7d6bc608 AP	175	if (fw->size % 17 != 0) {
8fe51725	176	dev_err(&client->dev, "firmware file '%s' is invalid\n",
08272db6	177	fw_name);
7d6bc608	178	ret = -EINVAL;
78dab40a	179	goto err_release_firmware;
7d6bc608	180	}
1b92373f	181
8fe51725	182	dev_info(&client->dev, "downloading firmware from file '%s'\n",
08272db6	183	fw_name);
1b92373f	184
7d6bc608 AP	185	for (remaining = fw->size; remaining > 0; remaining -= 17) {
7d6bc608 AP	186	len = fw->data[fw->size - remaining];
a828d72d LA	187	if (len > SI2157_ARGLEN) {
a828d72d LA	188	dev_err(&client->dev, "Bad firmware length\n");
d2cc2f0b	189	ret = -EINVAL;
a828d72d LA	190	goto err_release_firmware;
a828d72d LA	191	}
7d6bc608 AP	192	memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
	193	cmd.wlen = len;
	194	cmd.rlen = 1;
8fe51725	195	ret = si2157_cmd_execute(client, &cmd);
7d6bc608	196	if (ret) {
8fe51725	197	dev_err(&client->dev, "firmware download failed %d\n",
67d0113a	198	ret);
78dab40a	199	goto err_release_firmware;
1b92373f	200	}
1b92373f OS	201	}
1b92373f OS	202
7d6bc608	203	release_firmware(fw);
7d6bc608 AP	204
7d6bc608 AP	205	skip_fw_download:
b154121c OS	206	/* reboot the tuner with new firmware? */
	207	memcpy(cmd.args, "\x01\x01", 2);
	208	cmd.wlen = 2;
	209	cmd.rlen = 1;
8fe51725	210	ret = si2157_cmd_execute(client, &cmd);
b154121c OS	211	if (ret)
	212	goto err;
	213
c7011845 AP	214	/* query firmware version */
	215	memcpy(cmd.args, "\x11", 1);
	216	cmd.wlen = 1;
	217	cmd.rlen = 10;
	218	ret = si2157_cmd_execute(client, &cmd);
	219	if (ret)
	220	goto err;
	221
	222	dev_info(&client->dev, "firmware version: %c.%c.%d\n",
	223	cmd.args[6], cmd.args[7], cmd.args[8]);
4cbf6ed9	224	warm:
2f1ea29f AP	225	/* init statistics in order signal app which are supported */
	226	c->strength.len = 1;
	227	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
	228	/* start statistics polling */
	229	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000));
	230
70f13ff0	231	dev->active = true;
930a8730	232	return 0;
78dab40a	233	err_release_firmware:
dc89cfcf	234	release_firmware(fw);
e358c8a6	235	err:
8fe51725	236	dev_dbg(&client->dev, "failed=%d\n", ret);
b154121c	237	return ret;
930a8730 AP	238	}
	239
	240	static int si2157_sleep(struct dvb_frontend *fe)
	241	{
8fe51725 AP	242	struct i2c_client *client = fe->tuner_priv;
8fe51725 AP	243	struct si2157_dev *dev = i2c_get_clientdata(client);
a83d7d17 AP	244	int ret;
a83d7d17 AP	245	struct si2157_cmd cmd;
930a8730	246
8fe51725	247	dev_dbg(&client->dev, "\n");
930a8730	248
70f13ff0	249	dev->active = false;
930a8730	250
2f1ea29f AP	251	/* stop statistics polling */
	252	cancel_delayed_work_sync(&dev->stat_work);
	253
0e38233d OS	254	/* standby */
	255	memcpy(cmd.args, "\x16\x00", 2);
	256	cmd.wlen = 2;
	257	cmd.rlen = 1;
8fe51725	258	ret = si2157_cmd_execute(client, &cmd);
a83d7d17 AP	259	if (ret)
	260	goto err;
	261
930a8730	262	return 0;
a83d7d17	263	err:
8fe51725	264	dev_dbg(&client->dev, "failed=%d\n", ret);
a83d7d17	265	return ret;
930a8730 AP	266	}
	267
	268	static int si2157_set_params(struct dvb_frontend *fe)
	269	{
8fe51725 AP	270	struct i2c_client *client = fe->tuner_priv;
8fe51725 AP	271	struct si2157_dev *dev = i2c_get_clientdata(client);
930a8730 AP	272	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	273	int ret;
	274	struct si2157_cmd cmd;
a1dad50d	275	u8 bandwidth, delivery_system;
c28aebe1	276	u32 if_frequency = 5000000;
930a8730	277
8fe51725	278	dev_dbg(&client->dev,
67d0113a	279	"delivery_system=%d frequency=%u bandwidth_hz=%u\n",
8fe51725	280	c->delivery_system, c->frequency, c->bandwidth_hz);
930a8730	281
70f13ff0	282	if (!dev->active) {
930a8730 AP	283	ret = -EAGAIN;
	284	goto err;
	285	}
	286
a1dad50d OS	287	if (c->bandwidth_hz <= 6000000)
	288	bandwidth = 0x06;
	289	else if (c->bandwidth_hz <= 7000000)
	290	bandwidth = 0x07;
	291	else if (c->bandwidth_hz <= 8000000)
	292	bandwidth = 0x08;
	293	else
	294	bandwidth = 0x0f;
	295
	296	switch (c->delivery_system) {
5cd62db7 OS	297	case SYS_ATSC:
5cd62db7 OS	298	delivery_system = 0x00;
c28aebe1	299	if_frequency = 3250000;
5cd62db7	300	break;
0d1165fc OS	301	case SYS_DVBC_ANNEX_B:
0d1165fc OS	302	delivery_system = 0x10;
c28aebe1	303	if_frequency = 4000000;
0d1165fc	304	break;
a1dad50d OS	305	case SYS_DVBT:
	306	case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */
	307	delivery_system = 0x20;
	308	break;
	309	case SYS_DVBC_ANNEX_A:
	310	delivery_system = 0x30;
	311	break;
	312	default:
	313	ret = -EINVAL;
	314	goto err;
	315	}
	316
	317	memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
	318	cmd.args[4] = delivery_system \| bandwidth;
70f13ff0	319	if (dev->inversion)
05024efe	320	cmd.args[5] = 0x01;
a1dad50d	321	cmd.wlen = 6;
d87a5058	322	cmd.rlen = 4;
8fe51725	323	ret = si2157_cmd_execute(client, &cmd);
d87a5058 OS	324	if (ret)
	325	goto err;
	326
70f13ff0	327	if (dev->chiptype == SI2157_CHIPTYPE_SI2146)
073f3849 OS	328	memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
073f3849 OS	329	else
ee3c3e46 OS	330	memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6);
ee3c3e46 OS	331	cmd.args[4] = dev->if_port;
d87a5058 OS	332	cmd.wlen = 6;
d87a5058 OS	333	cmd.rlen = 4;
8fe51725	334	ret = si2157_cmd_execute(client, &cmd);
a1dad50d OS	335	if (ret)
	336	goto err;
	337
c28aebe1 OS	338	/* set if frequency if needed */
	339	if (if_frequency != dev->if_frequency) {
	340	memcpy(cmd.args, "\x14\x00\x06\x07", 4);
	341	cmd.args[4] = (if_frequency / 1000) & 0xff;
	342	cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
	343	cmd.wlen = 6;
	344	cmd.rlen = 4;
	345	ret = si2157_cmd_execute(client, &cmd);
	346	if (ret)
	347	goto err;
	348
	349	dev->if_frequency = if_frequency;
	350	}
	351
930a8730	352	/* set frequency */
b154121c	353	memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
930a8730 AP	354	cmd.args[4] = (c->frequency >> 0) & 0xff;
	355	cmd.args[5] = (c->frequency >> 8) & 0xff;
	356	cmd.args[6] = (c->frequency >> 16) & 0xff;
	357	cmd.args[7] = (c->frequency >> 24) & 0xff;
e6b4380f AP	358	cmd.wlen = 8;
e6b4380f AP	359	cmd.rlen = 1;
8fe51725	360	ret = si2157_cmd_execute(client, &cmd);
930a8730 AP	361	if (ret)
	362	goto err;
	363
	364	return 0;
	365	err:
8fe51725	366	dev_dbg(&client->dev, "failed=%d\n", ret);
930a8730 AP	367	return ret;
	368	}
	369
1140540d MS	370	static int si2157_get_if_frequency(struct dvb_frontend fe, u32 frequency)
1140540d MS	371	{
c28aebe1 OS	372	struct i2c_client *client = fe->tuner_priv;
	373	struct si2157_dev *dev = i2c_get_clientdata(client);
	374
	375	*frequency = dev->if_frequency;
1140540d MS	376	return 0;
	377	}
	378
6cc8a35d	379	static const struct dvb_tuner_ops si2157_ops = {
930a8730	380	.info = {
a3f90c75 MCC	381	.name = "Silicon Labs Si2141/Si2146/2147/2148/2157/2158",
	382	.frequency_min_hz = 42 * MHz,
	383	.frequency_max_hz = 870 * MHz,
930a8730 AP	384	},
	385
	386	.init = si2157_init,
	387	.sleep = si2157_sleep,
	388	.set_params = si2157_set_params,
1140540d	389	.get_if_frequency = si2157_get_if_frequency,
930a8730 AP	390	};
930a8730 AP	391
2f1ea29f AP	392	static void si2157_stat_work(struct work_struct *work)
	393	{
	394	struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work);
	395	struct dvb_frontend *fe = dev->fe;
	396	struct i2c_client *client = fe->tuner_priv;
	397	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	398	struct si2157_cmd cmd;
	399	int ret;
	400
	401	dev_dbg(&client->dev, "\n");
	402
	403	memcpy(cmd.args, "\x42\x00", 2);
	404	cmd.wlen = 2;
	405	cmd.rlen = 12;
	406	ret = si2157_cmd_execute(client, &cmd);
	407	if (ret)
	408	goto err;
	409
	410	c->strength.stat[0].scale = FE_SCALE_DECIBEL;
	411	c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000;
	412
	413	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
	414	return;
	415	err:
	416	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
	417	dev_dbg(&client->dev, "failed=%d\n", ret);
	418	}
	419
930a8730	420	static int si2157_probe(struct i2c_client *client,
8b0a81c7	421	const struct i2c_device_id *id)
930a8730 AP	422	{
	423	struct si2157_config *cfg = client->dev.platform_data;
	424	struct dvb_frontend *fe = cfg->fe;
70f13ff0	425	struct si2157_dev *dev;
930a8730 AP	426	struct si2157_cmd cmd;
	427	int ret;
	428
70f13ff0 AP	429	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
70f13ff0 AP	430	if (!dev) {
930a8730	431	ret = -ENOMEM;
67d0113a	432	dev_err(&client->dev, "kzalloc() failed\n");
930a8730 AP	433	goto err;
	434	}
	435
8fe51725	436	i2c_set_clientdata(client, dev);
70f13ff0 AP	437	dev->fe = cfg->fe;
70f13ff0 AP	438	dev->inversion = cfg->inversion;
ee3c3e46	439	dev->if_port = cfg->if_port;
70f13ff0	440	dev->chiptype = (u8)id->driver_data;
c28aebe1	441	dev->if_frequency = 5000000; /* default value of property 0x0706 */
70f13ff0	442	mutex_init(&dev->i2c_mutex);
2f1ea29f	443	INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work);
930a8730 AP	444
930a8730 AP	445	/* check if the tuner is there */
e6b4380f AP	446	cmd.wlen = 0;
e6b4380f AP	447	cmd.rlen = 1;
8fe51725	448	ret = si2157_cmd_execute(client, &cmd);
930a8730	449	if (ret)
e7f3f9f3	450	goto err_kfree;
930a8730	451
70f13ff0	452	memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
8fe51725	453	fe->tuner_priv = client;
930a8730	454
8b0a81c7 MCC	455	#ifdef CONFIG_MEDIA_CONTROLLER
	456	if (cfg->mdev) {
	457	dev->mdev = cfg->mdev;
	458
	459	dev->ent.name = KBUILD_MODNAME;
	460	dev->ent.function = MEDIA_ENT_F_TUNER;
552b926f MCC	461
	462	dev->pad[SI2157_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
	463	dev->pad[SI2157_PAD_RF_INPUT].sig_type = PAD_SIGNAL_ANALOG;
	464	dev->pad[SI2157_PAD_VID_OUT].flags = MEDIA_PAD_FL_SOURCE;
	465	dev->pad[SI2157_PAD_VID_OUT].sig_type = PAD_SIGNAL_ANALOG;
	466	dev->pad[SI2157_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE;
	467	dev->pad[SI2157_PAD_AUD_OUT].sig_type = PAD_SIGNAL_AUDIO;
	468
	469	ret = media_entity_pads_init(&dev->ent, SI2157_NUM_PADS,
8b0a81c7 MCC	470	&dev->pad[0]);
	471
	472	if (ret)
	473	goto err_kfree;
	474
	475	ret = media_device_register_entity(cfg->mdev, &dev->ent);
	476	if (ret) {
	477	media_entity_cleanup(&dev->ent);
	478	goto err_kfree;
	479	}
	480	}
	481	#endif
	482
8fe51725	483	dev_info(&client->dev, "Silicon Labs %s successfully attached\n",
3a2824c7	484	dev->chiptype == SI2157_CHIPTYPE_SI2141 ? "Si2141" :
297e14d5	485	dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
17ad09f1	486	"Si2146" : "Si2147/2148/2157/2158");
073f3849	487
930a8730	488	return 0;
e7f3f9f3 AP	489
	490	err_kfree:
	491	kfree(dev);
930a8730	492	err:
67d0113a	493	dev_dbg(&client->dev, "failed=%d\n", ret);
930a8730 AP	494	return ret;
	495	}
	496
	497	static int si2157_remove(struct i2c_client *client)
	498	{
70f13ff0 AP	499	struct si2157_dev *dev = i2c_get_clientdata(client);
70f13ff0 AP	500	struct dvb_frontend *fe = dev->fe;
930a8730	501
67d0113a	502	dev_dbg(&client->dev, "\n");
930a8730	503
01d1d714 EMW	504	/* stop statistics polling */
	505	cancel_delayed_work_sync(&dev->stat_work);
	506
8b0a81c7 MCC	507	#ifdef CONFIG_MEDIA_CONTROLLER_DVB
	508	if (dev->mdev)
	509	media_device_unregister_entity(&dev->ent);
	510	#endif
	511
930a8730 AP	512	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
930a8730 AP	513	fe->tuner_priv = NULL;
70f13ff0	514	kfree(dev);
930a8730 AP	515
	516	return 0;
	517	}
	518
c1292233 AP	519	static const struct i2c_device_id si2157_id_table[] = {
	520	{"si2157", SI2157_CHIPTYPE_SI2157},
	521	{"si2146", SI2157_CHIPTYPE_SI2146},
3a2824c7	522	{"si2141", SI2157_CHIPTYPE_SI2141},
930a8730 AP	523	{}
930a8730 AP	524	};
c1292233	525	MODULE_DEVICE_TABLE(i2c, si2157_id_table);
930a8730 AP	526
	527	static struct i2c_driver si2157_driver = {
	528	.driver = {
4a3fad70	529	.name = "si2157",
e6dd44d9	530	.suppress_bind_attrs = true,
930a8730 AP	531	},
	532	.probe = si2157_probe,
	533	.remove = si2157_remove,
c1292233	534	.id_table = si2157_id_table,
930a8730 AP	535	};
	536
	537	module_i2c_driver(si2157_driver);
	538
3a2824c7	539	MODULE_DESCRIPTION("Silicon Labs Si2141/Si2146/2147/2148/2157/2158 silicon tuner driver");
930a8730 AP	540	MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
930a8730 AP	541	MODULE_LICENSE("GPL");
bac53a2c	542	MODULE_FIRMWARE(SI2158_A20_FIRMWARE);
3a2824c7	543	MODULE_FIRMWARE(SI2141_A10_FIRMWARE);