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

/*
 * Silicon Labs Si2141/2146/2147/2148/2151/2157/2158 silicon tuner driver
 *
 * Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 */

#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;
}

#define MAX_RESET_ATTEMPTS 10
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, i;

	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;

	if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
		for (i = 0; i < MAX_RESET_ATTEMPTS; i++)  {
			/* reset */
			memcpy(cmd.args, "\xc0\x05\x00\x00", 4);
			cmd.wlen = 4;
			cmd.rlen = 1;
			ret = si2157_cmd_execute(client, &cmd);
			if (ret)
				goto err;

			memcpy(cmd.args, "\xc0\x00\x0d\x0e\x00\x01\x01\x01\x01\x03", 10);
			cmd.wlen = 10;
			cmd.rlen = 1;
			ret = si2157_cmd_execute(client, &cmd);
			if (ret)
				goto err;
			if (cmd.args[0] != 0xfe)
				break;
		}
		if (i >= MAX_RESET_ATTEMPTS)
			goto err;
	}

	/* power up */
	switch (dev->chiptype) {
	case SI2157_CHIPTYPE_SI2146:
		memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
		cmd.wlen = 9;
		break;
	case SI2157_CHIPTYPE_SI2141:
		memcpy(cmd.args, "\xc0\x08\x01\x02\x00\x08\x01", 7);
		cmd.wlen = 7;
		break;
	default:
		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;

	/* 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)
	#define SI2151_A10 ('A' << 24 | 51 << 16 | '1' << 8 | '0' << 0)

	switch (chip_id) {
	case SI2158_A20:
	case SI2148_A20:
		fw_name = SI2158_A20_FIRMWARE;
		break;
	case SI2157_A30:
	case SI2147_A30:
	case SI2146_A10:
		fw_name = NULL;
		break;
	case SI2141_A10:
	case SI2151_A10:
		fw_name = SI2141_A10_FIRMWARE;
		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]);

	if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
		/* set clock */
		memcpy(cmd.args, "\xc0\x00\x0d", 3);
		cmd.wlen = 3;
		cmd.rlen = 1;
		ret = si2157_cmd_execute(client, &cmd);
		if (ret)
			goto err;
		/* setup PIN */
		memcpy(cmd.args, "\x12\x80\x80\x85\x00\x81\x00", 7);
		cmd.wlen = 7;
		cmd.rlen = 7;
		ret = si2157_cmd_execute(client, &cmd);
		if (ret)
			goto err;
	}
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 Si2146/2147/2148/2157/2158",
		.frequency_min  = 42000000,
		.frequency_max  = 870000000,
	},

	.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[TUNER_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
		dev->pad[TUNER_PAD_OUTPUT].flags = MEDIA_PAD_FL_SOURCE;
		dev->pad[TUNER_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE;

		ret = media_entity_pads_init(&dev->ent, TUNER_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 ?
			"Si2141/2151" : 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},
	{"si2151", 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 Si2141/2146/2147/2148/2151/2157/2158 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
ba92ae0f	1	/*
690d55de	2	* Silicon Labs Si2141/2146/2147/2148/2151/2157/2158 silicon tuner driver
ba92ae0f AP	3	*
	4	* Copyright (C) 2014 Antti Palosaari <crope@iki.fi>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*/
	16
930a8730 AP	17	#include "si2157_priv.h"
930a8730 AP	18
1b92373f OS	19	static const struct dvb_tuner_ops si2157_ops;
1b92373f OS	20
930a8730	21	/* execute firmware command */
8fe51725	22	static int si2157_cmd_execute(struct i2c_client client, struct si2157_cmd cmd)
930a8730	23	{
8fe51725	24	struct si2157_dev *dev = i2c_get_clientdata(client);
930a8730	25	int ret;
930a8730 AP	26	unsigned long timeout;
930a8730 AP	27
70f13ff0	28	mutex_lock(&dev->i2c_mutex);
930a8730	29
e6b4380f	30	if (cmd->wlen) {
930a8730	31	/* write cmd and args for firmware */
8fe51725	32	ret = i2c_master_send(client, cmd->args, cmd->wlen);
930a8730 AP	33	if (ret < 0) {
930a8730 AP	34	goto err_mutex_unlock;
e6b4380f	35	} else if (ret != cmd->wlen) {
930a8730 AP	36	ret = -EREMOTEIO;
	37	goto err_mutex_unlock;
	38	}
	39	}
	40
e6b4380f AP	41	if (cmd->rlen) {
	42	/* wait cmd execution terminate */
	43	#define TIMEOUT 80
	44	timeout = jiffies + msecs_to_jiffies(TIMEOUT);
	45	while (!time_after(jiffies, timeout)) {
8fe51725	46	ret = i2c_master_recv(client, cmd->args, cmd->rlen);
e6b4380f AP	47	if (ret < 0) {
	48	goto err_mutex_unlock;
	49	} else if (ret != cmd->rlen) {
	50	ret = -EREMOTEIO;
	51	goto err_mutex_unlock;
	52	}
	53
	54	/* firmware ready? */
	55	if ((cmd->args[0] >> 7) & 0x01)
	56	break;
930a8730 AP	57	}
930a8730 AP	58
8fe51725	59	dev_dbg(&client->dev, "cmd execution took %d ms\n",
e6b4380f AP	60	jiffies_to_msecs(jiffies) -
e6b4380f AP	61	(jiffies_to_msecs(timeout) - TIMEOUT));
930a8730	62
e6b4380f AP	63	if (!((cmd->args[0] >> 7) & 0x01)) {
	64	ret = -ETIMEDOUT;
	65	goto err_mutex_unlock;
	66	}
930a8730 AP	67	}
930a8730 AP	68
7cbf5d76 AP	69	mutex_unlock(&dev->i2c_mutex);
7cbf5d76 AP	70	return 0;
e6b4380f	71
930a8730	72	err_mutex_unlock:
70f13ff0	73	mutex_unlock(&dev->i2c_mutex);
8fe51725	74	dev_dbg(&client->dev, "failed=%d\n", ret);
930a8730 AP	75	return ret;
	76	}
	77
690d55de	78	#define MAX_RESET_ATTEMPTS 10
930a8730 AP	79	static int si2157_init(struct dvb_frontend *fe)
930a8730 AP	80	{
8fe51725 AP	81	struct i2c_client *client = fe->tuner_priv;
8fe51725 AP	82	struct si2157_dev *dev = i2c_get_clientdata(client);
2f1ea29f	83	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
7d6bc608	84	int ret, len, remaining;
b154121c	85	struct si2157_cmd cmd;
78dab40a	86	const struct firmware *fw;
08272db6	87	const char *fw_name;
690d55de	88	unsigned int uitmp, chip_id, i;
930a8730	89
8fe51725	90	dev_dbg(&client->dev, "\n");
930a8730	91
78bab930 AP	92	/* Returned IF frequency is garbage when firmware is not running */
	93	memcpy(cmd.args, "\x15\x00\x06\x07", 4);
	94	cmd.wlen = 4;
	95	cmd.rlen = 4;
	96	ret = si2157_cmd_execute(client, &cmd);
	97	if (ret)
	98	goto err;
	99
	100	uitmp = cmd.args[2] << 0 \| cmd.args[3] << 8;
	101	dev_dbg(&client->dev, "if_frequency kHz=%u\n", uitmp);
	102
	103	if (uitmp == dev->if_frequency / 1000)
4cbf6ed9 OS	104	goto warm;
4cbf6ed9 OS	105
690d55de EP	106	if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
	107	for (i = 0; i < MAX_RESET_ATTEMPTS; i++) {
	108	/* reset */
	109	memcpy(cmd.args, "\xc0\x05\x00\x00", 4);
	110	cmd.wlen = 4;
	111	cmd.rlen = 1;
	112	ret = si2157_cmd_execute(client, &cmd);
	113	if (ret)
	114	goto err;
	115
	116	memcpy(cmd.args, "\xc0\x00\x0d\x0e\x00\x01\x01\x01\x01\x03", 10);
	117	cmd.wlen = 10;
	118	cmd.rlen = 1;
	119	ret = si2157_cmd_execute(client, &cmd);
	120	if (ret)
	121	goto err;
	122	if (cmd.args[0] != 0xfe)
	123	break;
	124	}
	125	if (i >= MAX_RESET_ATTEMPTS)
	126	goto err;
	127	}
	128
4cbf6ed9	129	/* power up */
690d55de EP	130	switch (dev->chiptype) {
690d55de EP	131	case SI2157_CHIPTYPE_SI2146:
073f3849 OS	132	memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
073f3849 OS	133	cmd.wlen = 9;
690d55de EP	134	break;
	135	case SI2157_CHIPTYPE_SI2141:
	136	memcpy(cmd.args, "\xc0\x08\x01\x02\x00\x08\x01", 7);
	137	cmd.wlen = 7;
	138	break;
	139	default:
073f3849 OS	140	memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
	141	cmd.wlen = 15;
	142	}
690d55de	143
b154121c	144	cmd.rlen = 1;
8fe51725	145	ret = si2157_cmd_execute(client, &cmd);
b154121c OS	146	if (ret)
	147	goto err;
	148
	149	/* query chip revision */
	150	memcpy(cmd.args, "\x02", 1);
	151	cmd.wlen = 1;
	152	cmd.rlen = 13;
8fe51725	153	ret = si2157_cmd_execute(client, &cmd);
b154121c OS	154	if (ret)
	155	goto err;
	156
7d6bc608 AP	157	chip_id = cmd.args[1] << 24 \| cmd.args[2] << 16 \| cmd.args[3] << 8 \|
	158	cmd.args[4] << 0;
	159
	160	#define SI2158_A20 ('A' << 24 \| 58 << 16 \| '2' << 8 \| '0' << 0)
17ad09f1	161	#define SI2148_A20 ('A' << 24 \| 48 << 16 \| '2' << 8 \| '0' << 0)
7d6bc608	162	#define SI2157_A30 ('A' << 24 \| 57 << 16 \| '3' << 8 \| '0' << 0)
d87a5058	163	#define SI2147_A30 ('A' << 24 \| 47 << 16 \| '3' << 8 \| '0' << 0)
073f3849	164	#define SI2146_A10 ('A' << 24 \| 46 << 16 \| '1' << 8 \| '0' << 0)
690d55de EP	165	#define SI2141_A10 ('A' << 24 \| 41 << 16 \| '1' << 8 \| '0' << 0)
690d55de EP	166	#define SI2151_A10 ('A' << 24 \| 51 << 16 \| '1' << 8 \| '0' << 0)
7d6bc608 AP	167
	168	switch (chip_id) {
	169	case SI2158_A20:
17ad09f1	170	case SI2148_A20:
08272db6	171	fw_name = SI2158_A20_FIRMWARE;
7d6bc608 AP	172	break;
7d6bc608 AP	173	case SI2157_A30:
d87a5058	174	case SI2147_A30:
073f3849	175	case SI2146_A10:
08272db6	176	fw_name = NULL;
6c372533	177	break;
690d55de EP	178	case SI2141_A10:
	179	case SI2151_A10:
	180	fw_name = SI2141_A10_FIRMWARE;
	181	break;
7d6bc608	182	default:
8fe51725	183	dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
67d0113a	184	cmd.args[2], cmd.args[1],
7d6bc608 AP	185	cmd.args[3], cmd.args[4]);
	186	ret = -EINVAL;
	187	goto err;
	188	}
1b92373f	189
6c372533 AP	190	dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
	191	cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
	192
08272db6	193	if (fw_name == NULL)
6c372533	194	goto skip_fw_download;
1b92373f	195
7d6bc608	196	/* request the firmware, this will block and timeout */
08272db6	197	ret = request_firmware(&fw, fw_name, &client->dev);
7d6bc608	198	if (ret) {
8fe51725	199	dev_err(&client->dev, "firmware file '%s' not found\n",
08272db6	200	fw_name);
7d6bc608 AP	201	goto err;
7d6bc608 AP	202	}
1b92373f	203
7d6bc608 AP	204	/* firmware should be n chunks of 17 bytes */
7d6bc608 AP	205	if (fw->size % 17 != 0) {
8fe51725	206	dev_err(&client->dev, "firmware file '%s' is invalid\n",
08272db6	207	fw_name);
7d6bc608	208	ret = -EINVAL;
78dab40a	209	goto err_release_firmware;
7d6bc608	210	}
1b92373f	211
8fe51725	212	dev_info(&client->dev, "downloading firmware from file '%s'\n",
08272db6	213	fw_name);
1b92373f	214
7d6bc608 AP	215	for (remaining = fw->size; remaining > 0; remaining -= 17) {
7d6bc608 AP	216	len = fw->data[fw->size - remaining];
a828d72d LA	217	if (len > SI2157_ARGLEN) {
a828d72d LA	218	dev_err(&client->dev, "Bad firmware length\n");
d2cc2f0b	219	ret = -EINVAL;
a828d72d LA	220	goto err_release_firmware;
a828d72d LA	221	}
7d6bc608 AP	222	memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
	223	cmd.wlen = len;
	224	cmd.rlen = 1;
8fe51725	225	ret = si2157_cmd_execute(client, &cmd);
7d6bc608	226	if (ret) {
8fe51725	227	dev_err(&client->dev, "firmware download failed %d\n",
67d0113a	228	ret);
78dab40a	229	goto err_release_firmware;
1b92373f	230	}
1b92373f OS	231	}
1b92373f OS	232
7d6bc608	233	release_firmware(fw);
7d6bc608 AP	234
7d6bc608 AP	235	skip_fw_download:
b154121c OS	236	/* reboot the tuner with new firmware? */
	237	memcpy(cmd.args, "\x01\x01", 2);
	238	cmd.wlen = 2;
	239	cmd.rlen = 1;
8fe51725	240	ret = si2157_cmd_execute(client, &cmd);
b154121c OS	241	if (ret)
	242	goto err;
	243
c7011845 AP	244	/* query firmware version */
	245	memcpy(cmd.args, "\x11", 1);
	246	cmd.wlen = 1;
	247	cmd.rlen = 10;
	248	ret = si2157_cmd_execute(client, &cmd);
	249	if (ret)
	250	goto err;
	251
	252	dev_info(&client->dev, "firmware version: %c.%c.%d\n",
	253	cmd.args[6], cmd.args[7], cmd.args[8]);
690d55de EP	254
	255	if (dev->chiptype == SI2157_CHIPTYPE_SI2141) {
	256	/* set clock */
	257	memcpy(cmd.args, "\xc0\x00\x0d", 3);
	258	cmd.wlen = 3;
	259	cmd.rlen = 1;
	260	ret = si2157_cmd_execute(client, &cmd);
	261	if (ret)
	262	goto err;
	263	/* setup PIN */
	264	memcpy(cmd.args, "\x12\x80\x80\x85\x00\x81\x00", 7);
	265	cmd.wlen = 7;
	266	cmd.rlen = 7;
	267	ret = si2157_cmd_execute(client, &cmd);
	268	if (ret)
	269	goto err;
	270	}
4cbf6ed9	271	warm:
2f1ea29f AP	272	/* init statistics in order signal app which are supported */
	273	c->strength.len = 1;
	274	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
	275	/* start statistics polling */
	276	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000));
	277
70f13ff0	278	dev->active = true;
930a8730	279	return 0;
78dab40a	280	err_release_firmware:
dc89cfcf	281	release_firmware(fw);
e358c8a6	282	err:
8fe51725	283	dev_dbg(&client->dev, "failed=%d\n", ret);
b154121c	284	return ret;
930a8730 AP	285	}
	286
	287	static int si2157_sleep(struct dvb_frontend *fe)
	288	{
8fe51725 AP	289	struct i2c_client *client = fe->tuner_priv;
8fe51725 AP	290	struct si2157_dev *dev = i2c_get_clientdata(client);
a83d7d17 AP	291	int ret;
a83d7d17 AP	292	struct si2157_cmd cmd;
930a8730	293
8fe51725	294	dev_dbg(&client->dev, "\n");
930a8730	295
70f13ff0	296	dev->active = false;
930a8730	297
2f1ea29f AP	298	/* stop statistics polling */
	299	cancel_delayed_work_sync(&dev->stat_work);
	300
0e38233d OS	301	/* standby */
	302	memcpy(cmd.args, "\x16\x00", 2);
	303	cmd.wlen = 2;
	304	cmd.rlen = 1;
8fe51725	305	ret = si2157_cmd_execute(client, &cmd);
a83d7d17 AP	306	if (ret)
	307	goto err;
	308
930a8730	309	return 0;
a83d7d17	310	err:
8fe51725	311	dev_dbg(&client->dev, "failed=%d\n", ret);
a83d7d17	312	return ret;
930a8730 AP	313	}
	314
	315	static int si2157_set_params(struct dvb_frontend *fe)
	316	{
8fe51725 AP	317	struct i2c_client *client = fe->tuner_priv;
8fe51725 AP	318	struct si2157_dev *dev = i2c_get_clientdata(client);
930a8730 AP	319	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	320	int ret;
	321	struct si2157_cmd cmd;
a1dad50d	322	u8 bandwidth, delivery_system;
c28aebe1	323	u32 if_frequency = 5000000;
930a8730	324
8fe51725	325	dev_dbg(&client->dev,
67d0113a	326	"delivery_system=%d frequency=%u bandwidth_hz=%u\n",
8fe51725	327	c->delivery_system, c->frequency, c->bandwidth_hz);
930a8730	328
70f13ff0	329	if (!dev->active) {
930a8730 AP	330	ret = -EAGAIN;
	331	goto err;
	332	}
	333
a1dad50d OS	334	if (c->bandwidth_hz <= 6000000)
	335	bandwidth = 0x06;
	336	else if (c->bandwidth_hz <= 7000000)
	337	bandwidth = 0x07;
	338	else if (c->bandwidth_hz <= 8000000)
	339	bandwidth = 0x08;
	340	else
	341	bandwidth = 0x0f;
	342
	343	switch (c->delivery_system) {
5cd62db7 OS	344	case SYS_ATSC:
5cd62db7 OS	345	delivery_system = 0x00;
c28aebe1	346	if_frequency = 3250000;
5cd62db7	347	break;
0d1165fc OS	348	case SYS_DVBC_ANNEX_B:
0d1165fc OS	349	delivery_system = 0x10;
c28aebe1	350	if_frequency = 4000000;
0d1165fc	351	break;
a1dad50d OS	352	case SYS_DVBT:
	353	case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */
	354	delivery_system = 0x20;
	355	break;
	356	case SYS_DVBC_ANNEX_A:
	357	delivery_system = 0x30;
	358	break;
	359	default:
	360	ret = -EINVAL;
	361	goto err;
	362	}
	363
	364	memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
	365	cmd.args[4] = delivery_system \| bandwidth;
70f13ff0	366	if (dev->inversion)
05024efe	367	cmd.args[5] = 0x01;
a1dad50d	368	cmd.wlen = 6;
d87a5058	369	cmd.rlen = 4;
8fe51725	370	ret = si2157_cmd_execute(client, &cmd);
d87a5058 OS	371	if (ret)
	372	goto err;
	373
70f13ff0	374	if (dev->chiptype == SI2157_CHIPTYPE_SI2146)
073f3849 OS	375	memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
073f3849 OS	376	else
ee3c3e46 OS	377	memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6);
ee3c3e46 OS	378	cmd.args[4] = dev->if_port;
d87a5058 OS	379	cmd.wlen = 6;
d87a5058 OS	380	cmd.rlen = 4;
8fe51725	381	ret = si2157_cmd_execute(client, &cmd);
a1dad50d OS	382	if (ret)
	383	goto err;
	384
c28aebe1 OS	385	/* set if frequency if needed */
	386	if (if_frequency != dev->if_frequency) {
	387	memcpy(cmd.args, "\x14\x00\x06\x07", 4);
	388	cmd.args[4] = (if_frequency / 1000) & 0xff;
	389	cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
	390	cmd.wlen = 6;
	391	cmd.rlen = 4;
	392	ret = si2157_cmd_execute(client, &cmd);
	393	if (ret)
	394	goto err;
	395
	396	dev->if_frequency = if_frequency;
	397	}
	398
930a8730	399	/* set frequency */
b154121c	400	memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
930a8730 AP	401	cmd.args[4] = (c->frequency >> 0) & 0xff;
	402	cmd.args[5] = (c->frequency >> 8) & 0xff;
	403	cmd.args[6] = (c->frequency >> 16) & 0xff;
	404	cmd.args[7] = (c->frequency >> 24) & 0xff;
e6b4380f AP	405	cmd.wlen = 8;
e6b4380f AP	406	cmd.rlen = 1;
8fe51725	407	ret = si2157_cmd_execute(client, &cmd);
930a8730 AP	408	if (ret)
	409	goto err;
	410
	411	return 0;
	412	err:
8fe51725	413	dev_dbg(&client->dev, "failed=%d\n", ret);
930a8730 AP	414	return ret;
	415	}
	416
1140540d MS	417	static int si2157_get_if_frequency(struct dvb_frontend fe, u32 frequency)
1140540d MS	418	{
c28aebe1 OS	419	struct i2c_client *client = fe->tuner_priv;
	420	struct si2157_dev *dev = i2c_get_clientdata(client);
	421
	422	*frequency = dev->if_frequency;
1140540d MS	423	return 0;
	424	}
	425
6cc8a35d	426	static const struct dvb_tuner_ops si2157_ops = {
930a8730	427	.info = {
17ad09f1	428	.name = "Silicon Labs Si2146/2147/2148/2157/2158",
9398ddfe AK	429	.frequency_min = 42000000,
9398ddfe AK	430	.frequency_max = 870000000,
930a8730 AP	431	},
	432
	433	.init = si2157_init,
	434	.sleep = si2157_sleep,
	435	.set_params = si2157_set_params,
1140540d	436	.get_if_frequency = si2157_get_if_frequency,
930a8730 AP	437	};
930a8730 AP	438
2f1ea29f AP	439	static void si2157_stat_work(struct work_struct *work)
	440	{
	441	struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work);
	442	struct dvb_frontend *fe = dev->fe;
	443	struct i2c_client *client = fe->tuner_priv;
	444	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	445	struct si2157_cmd cmd;
	446	int ret;
	447
	448	dev_dbg(&client->dev, "\n");
	449
	450	memcpy(cmd.args, "\x42\x00", 2);
	451	cmd.wlen = 2;
	452	cmd.rlen = 12;
	453	ret = si2157_cmd_execute(client, &cmd);
	454	if (ret)
	455	goto err;
	456
	457	c->strength.stat[0].scale = FE_SCALE_DECIBEL;
	458	c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000;
	459
	460	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
	461	return;
	462	err:
	463	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
	464	dev_dbg(&client->dev, "failed=%d\n", ret);
	465	}
	466
930a8730	467	static int si2157_probe(struct i2c_client *client,
8b0a81c7	468	const struct i2c_device_id *id)
930a8730 AP	469	{
	470	struct si2157_config *cfg = client->dev.platform_data;
	471	struct dvb_frontend *fe = cfg->fe;
70f13ff0	472	struct si2157_dev *dev;
930a8730 AP	473	struct si2157_cmd cmd;
	474	int ret;
	475
70f13ff0 AP	476	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
70f13ff0 AP	477	if (!dev) {
930a8730	478	ret = -ENOMEM;
67d0113a	479	dev_err(&client->dev, "kzalloc() failed\n");
930a8730 AP	480	goto err;
	481	}
	482
8fe51725	483	i2c_set_clientdata(client, dev);
70f13ff0 AP	484	dev->fe = cfg->fe;
70f13ff0 AP	485	dev->inversion = cfg->inversion;
ee3c3e46	486	dev->if_port = cfg->if_port;
70f13ff0	487	dev->chiptype = (u8)id->driver_data;
c28aebe1	488	dev->if_frequency = 5000000; /* default value of property 0x0706 */
70f13ff0	489	mutex_init(&dev->i2c_mutex);
2f1ea29f	490	INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work);
930a8730 AP	491
930a8730 AP	492	/* check if the tuner is there */
e6b4380f AP	493	cmd.wlen = 0;
e6b4380f AP	494	cmd.rlen = 1;
8fe51725	495	ret = si2157_cmd_execute(client, &cmd);
930a8730	496	if (ret)
e7f3f9f3	497	goto err_kfree;
930a8730	498
70f13ff0	499	memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
8fe51725	500	fe->tuner_priv = client;
930a8730	501
8b0a81c7 MCC	502	#ifdef CONFIG_MEDIA_CONTROLLER
	503	if (cfg->mdev) {
	504	dev->mdev = cfg->mdev;
	505
	506	dev->ent.name = KBUILD_MODNAME;
	507	dev->ent.function = MEDIA_ENT_F_TUNER;
	508
	509	dev->pad[TUNER_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
	510	dev->pad[TUNER_PAD_OUTPUT].flags = MEDIA_PAD_FL_SOURCE;
	511	dev->pad[TUNER_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE;
	512
	513	ret = media_entity_pads_init(&dev->ent, TUNER_NUM_PADS,
	514	&dev->pad[0]);
	515
	516	if (ret)
	517	goto err_kfree;
	518
	519	ret = media_device_register_entity(cfg->mdev, &dev->ent);
	520	if (ret) {
	521	media_entity_cleanup(&dev->ent);
	522	goto err_kfree;
	523	}
	524	}
	525	#endif
	526
8fe51725	527	dev_info(&client->dev, "Silicon Labs %s successfully attached\n",
690d55de EP	528	dev->chiptype == SI2157_CHIPTYPE_SI2141 ?
690d55de EP	529	"Si2141/2151" : dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
17ad09f1	530	"Si2146" : "Si2147/2148/2157/2158");
073f3849	531
930a8730	532	return 0;
e7f3f9f3 AP	533
	534	err_kfree:
	535	kfree(dev);
930a8730	536	err:
67d0113a	537	dev_dbg(&client->dev, "failed=%d\n", ret);
930a8730 AP	538	return ret;
	539	}
	540
	541	static int si2157_remove(struct i2c_client *client)
	542	{
70f13ff0 AP	543	struct si2157_dev *dev = i2c_get_clientdata(client);
70f13ff0 AP	544	struct dvb_frontend *fe = dev->fe;
930a8730	545
67d0113a	546	dev_dbg(&client->dev, "\n");
930a8730	547
01d1d714 EMW	548	/* stop statistics polling */
	549	cancel_delayed_work_sync(&dev->stat_work);
	550
8b0a81c7 MCC	551	#ifdef CONFIG_MEDIA_CONTROLLER_DVB
	552	if (dev->mdev)
	553	media_device_unregister_entity(&dev->ent);
	554	#endif
	555
930a8730 AP	556	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
930a8730 AP	557	fe->tuner_priv = NULL;
70f13ff0	558	kfree(dev);
930a8730 AP	559
	560	return 0;
	561	}
	562
c1292233 AP	563	static const struct i2c_device_id si2157_id_table[] = {
	564	{"si2157", SI2157_CHIPTYPE_SI2157},
	565	{"si2146", SI2157_CHIPTYPE_SI2146},
690d55de EP	566	{"si2141", SI2157_CHIPTYPE_SI2141},
690d55de EP	567	{"si2151", SI2157_CHIPTYPE_SI2141},
930a8730 AP	568	{}
930a8730 AP	569	};
c1292233	570	MODULE_DEVICE_TABLE(i2c, si2157_id_table);
930a8730 AP	571
	572	static struct i2c_driver si2157_driver = {
	573	.driver = {
e6dd44d9 AP	574	.name = "si2157",
e6dd44d9 AP	575	.suppress_bind_attrs = true,
930a8730 AP	576	},
	577	.probe = si2157_probe,
	578	.remove = si2157_remove,
c1292233	579	.id_table = si2157_id_table,
930a8730 AP	580	};
	581
	582	module_i2c_driver(si2157_driver);
	583
690d55de	584	MODULE_DESCRIPTION("Silicon Labs Si2141/2146/2147/2148/2151/2157/2158 silicon tuner driver");
930a8730 AP	585	MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
930a8730 AP	586	MODULE_LICENSE("GPL");
bac53a2c	587	MODULE_FIRMWARE(SI2158_A20_FIRMWARE);
690d55de	588	MODULE_FIRMWARE(SI2141_A10_FIRMWARE);