[deliverable/linux.git] / drivers / media / tuners / si2157.c

/*
 * Silicon Labs Si2146/2147/2148/2157/2158 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;
}

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 {
		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)

	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;
	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 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_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},
	{}
};
MODULE_DEVICE_TABLE(i2c, si2157_id_table);

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

module_i2c_driver(si2157_driver);

MODULE_DESCRIPTION("Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver");
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE(SI2158_A20_FIRMWARE);
Commit	Line	Data
ba92ae0f	1	/*
17ad09f1	2	* Silicon Labs Si2146/2147/2148/2157/2158 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
	78	static int si2157_init(struct dvb_frontend *fe)
	79	{
8fe51725 AP	80	struct i2c_client *client = fe->tuner_priv;
8fe51725 AP	81	struct si2157_dev *dev = i2c_get_clientdata(client);
2f1ea29f	82	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
7d6bc608	83	int ret, len, remaining;
b154121c	84	struct si2157_cmd cmd;
78dab40a	85	const struct firmware *fw;
08272db6	86	const char *fw_name;
78bab930	87	unsigned int uitmp, chip_id;
930a8730	88
8fe51725	89	dev_dbg(&client->dev, "\n");
930a8730	90
78bab930 AP	91	/* Returned IF frequency is garbage when firmware is not running */
	92	memcpy(cmd.args, "\x15\x00\x06\x07", 4);
	93	cmd.wlen = 4;
	94	cmd.rlen = 4;
	95	ret = si2157_cmd_execute(client, &cmd);
	96	if (ret)
	97	goto err;
	98
	99	uitmp = cmd.args[2] << 0 \| cmd.args[3] << 8;
	100	dev_dbg(&client->dev, "if_frequency kHz=%u\n", uitmp);
	101
	102	if (uitmp == dev->if_frequency / 1000)
4cbf6ed9 OS	103	goto warm;
	104
	105	/* power up */
70f13ff0	106	if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
073f3849 OS	107	memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
	108	cmd.wlen = 9;
	109	} else {
	110	memcpy(cmd.args, "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01", 15);
	111	cmd.wlen = 15;
	112	}
b154121c	113	cmd.rlen = 1;
8fe51725	114	ret = si2157_cmd_execute(client, &cmd);
b154121c OS	115	if (ret)
	116	goto err;
	117
	118	/* query chip revision */
	119	memcpy(cmd.args, "\x02", 1);
	120	cmd.wlen = 1;
	121	cmd.rlen = 13;
8fe51725	122	ret = si2157_cmd_execute(client, &cmd);
b154121c OS	123	if (ret)
	124	goto err;
	125
7d6bc608 AP	126	chip_id = cmd.args[1] << 24 \| cmd.args[2] << 16 \| cmd.args[3] << 8 \|
	127	cmd.args[4] << 0;
	128
	129	#define SI2158_A20 ('A' << 24 \| 58 << 16 \| '2' << 8 \| '0' << 0)
17ad09f1	130	#define SI2148_A20 ('A' << 24 \| 48 << 16 \| '2' << 8 \| '0' << 0)
7d6bc608	131	#define SI2157_A30 ('A' << 24 \| 57 << 16 \| '3' << 8 \| '0' << 0)
d87a5058	132	#define SI2147_A30 ('A' << 24 \| 47 << 16 \| '3' << 8 \| '0' << 0)
073f3849	133	#define SI2146_A10 ('A' << 24 \| 46 << 16 \| '1' << 8 \| '0' << 0)
7d6bc608 AP	134
	135	switch (chip_id) {
	136	case SI2158_A20:
17ad09f1	137	case SI2148_A20:
08272db6	138	fw_name = SI2158_A20_FIRMWARE;
7d6bc608 AP	139	break;
7d6bc608 AP	140	case SI2157_A30:
d87a5058	141	case SI2147_A30:
073f3849	142	case SI2146_A10:
08272db6	143	fw_name = NULL;
6c372533	144	break;
7d6bc608	145	default:
8fe51725	146	dev_err(&client->dev, "unknown chip version Si21%d-%c%c%c\n",
67d0113a	147	cmd.args[2], cmd.args[1],
7d6bc608 AP	148	cmd.args[3], cmd.args[4]);
	149	ret = -EINVAL;
	150	goto err;
	151	}
1b92373f	152
6c372533 AP	153	dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
	154	cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
	155
08272db6	156	if (fw_name == NULL)
6c372533	157	goto skip_fw_download;
1b92373f	158
7d6bc608	159	/* request the firmware, this will block and timeout */
08272db6	160	ret = request_firmware(&fw, fw_name, &client->dev);
7d6bc608	161	if (ret) {
8fe51725	162	dev_err(&client->dev, "firmware file '%s' not found\n",
08272db6	163	fw_name);
7d6bc608 AP	164	goto err;
7d6bc608 AP	165	}
1b92373f	166
7d6bc608 AP	167	/* firmware should be n chunks of 17 bytes */
7d6bc608 AP	168	if (fw->size % 17 != 0) {
8fe51725	169	dev_err(&client->dev, "firmware file '%s' is invalid\n",
08272db6	170	fw_name);
7d6bc608	171	ret = -EINVAL;
78dab40a	172	goto err_release_firmware;
7d6bc608	173	}
1b92373f	174
8fe51725	175	dev_info(&client->dev, "downloading firmware from file '%s'\n",
08272db6	176	fw_name);
1b92373f	177
7d6bc608 AP	178	for (remaining = fw->size; remaining > 0; remaining -= 17) {
7d6bc608 AP	179	len = fw->data[fw->size - remaining];
a828d72d LA	180	if (len > SI2157_ARGLEN) {
a828d72d LA	181	dev_err(&client->dev, "Bad firmware length\n");
d2cc2f0b	182	ret = -EINVAL;
a828d72d LA	183	goto err_release_firmware;
a828d72d LA	184	}
7d6bc608 AP	185	memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len);
	186	cmd.wlen = len;
	187	cmd.rlen = 1;
8fe51725	188	ret = si2157_cmd_execute(client, &cmd);
7d6bc608	189	if (ret) {
8fe51725	190	dev_err(&client->dev, "firmware download failed %d\n",
67d0113a	191	ret);
78dab40a	192	goto err_release_firmware;
1b92373f	193	}
1b92373f OS	194	}
1b92373f OS	195
7d6bc608	196	release_firmware(fw);
7d6bc608 AP	197
7d6bc608 AP	198	skip_fw_download:
b154121c OS	199	/* reboot the tuner with new firmware? */
	200	memcpy(cmd.args, "\x01\x01", 2);
	201	cmd.wlen = 2;
	202	cmd.rlen = 1;
8fe51725	203	ret = si2157_cmd_execute(client, &cmd);
b154121c OS	204	if (ret)
	205	goto err;
	206
c7011845 AP	207	/* query firmware version */
	208	memcpy(cmd.args, "\x11", 1);
	209	cmd.wlen = 1;
	210	cmd.rlen = 10;
	211	ret = si2157_cmd_execute(client, &cmd);
	212	if (ret)
	213	goto err;
	214
	215	dev_info(&client->dev, "firmware version: %c.%c.%d\n",
	216	cmd.args[6], cmd.args[7], cmd.args[8]);
4cbf6ed9	217	warm:
2f1ea29f AP	218	/* init statistics in order signal app which are supported */
	219	c->strength.len = 1;
	220	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
	221	/* start statistics polling */
	222	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(1000));
	223
70f13ff0	224	dev->active = true;
930a8730	225	return 0;
78dab40a	226	err_release_firmware:
dc89cfcf	227	release_firmware(fw);
e358c8a6	228	err:
8fe51725	229	dev_dbg(&client->dev, "failed=%d\n", ret);
b154121c	230	return ret;
930a8730 AP	231	}
	232
	233	static int si2157_sleep(struct dvb_frontend *fe)
	234	{
8fe51725 AP	235	struct i2c_client *client = fe->tuner_priv;
8fe51725 AP	236	struct si2157_dev *dev = i2c_get_clientdata(client);
a83d7d17 AP	237	int ret;
a83d7d17 AP	238	struct si2157_cmd cmd;
930a8730	239
8fe51725	240	dev_dbg(&client->dev, "\n");
930a8730	241
70f13ff0	242	dev->active = false;
930a8730	243
2f1ea29f AP	244	/* stop statistics polling */
	245	cancel_delayed_work_sync(&dev->stat_work);
	246
0e38233d OS	247	/* standby */
	248	memcpy(cmd.args, "\x16\x00", 2);
	249	cmd.wlen = 2;
	250	cmd.rlen = 1;
8fe51725	251	ret = si2157_cmd_execute(client, &cmd);
a83d7d17 AP	252	if (ret)
	253	goto err;
	254
930a8730	255	return 0;
a83d7d17	256	err:
8fe51725	257	dev_dbg(&client->dev, "failed=%d\n", ret);
a83d7d17	258	return ret;
930a8730 AP	259	}
	260
	261	static int si2157_set_params(struct dvb_frontend *fe)
	262	{
8fe51725 AP	263	struct i2c_client *client = fe->tuner_priv;
8fe51725 AP	264	struct si2157_dev *dev = i2c_get_clientdata(client);
930a8730 AP	265	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	266	int ret;
	267	struct si2157_cmd cmd;
a1dad50d	268	u8 bandwidth, delivery_system;
c28aebe1	269	u32 if_frequency = 5000000;
930a8730	270
8fe51725	271	dev_dbg(&client->dev,
67d0113a	272	"delivery_system=%d frequency=%u bandwidth_hz=%u\n",
8fe51725	273	c->delivery_system, c->frequency, c->bandwidth_hz);
930a8730	274
70f13ff0	275	if (!dev->active) {
930a8730 AP	276	ret = -EAGAIN;
	277	goto err;
	278	}
	279
a1dad50d OS	280	if (c->bandwidth_hz <= 6000000)
	281	bandwidth = 0x06;
	282	else if (c->bandwidth_hz <= 7000000)
	283	bandwidth = 0x07;
	284	else if (c->bandwidth_hz <= 8000000)
	285	bandwidth = 0x08;
	286	else
	287	bandwidth = 0x0f;
	288
	289	switch (c->delivery_system) {
5cd62db7 OS	290	case SYS_ATSC:
5cd62db7 OS	291	delivery_system = 0x00;
c28aebe1	292	if_frequency = 3250000;
5cd62db7	293	break;
0d1165fc OS	294	case SYS_DVBC_ANNEX_B:
0d1165fc OS	295	delivery_system = 0x10;
c28aebe1	296	if_frequency = 4000000;
0d1165fc	297	break;
a1dad50d OS	298	case SYS_DVBT:
	299	case SYS_DVBT2: /* it seems DVB-T and DVB-T2 both are 0x20 here */
	300	delivery_system = 0x20;
	301	break;
	302	case SYS_DVBC_ANNEX_A:
	303	delivery_system = 0x30;
	304	break;
	305	default:
	306	ret = -EINVAL;
	307	goto err;
	308	}
	309
	310	memcpy(cmd.args, "\x14\x00\x03\x07\x00\x00", 6);
	311	cmd.args[4] = delivery_system \| bandwidth;
70f13ff0	312	if (dev->inversion)
05024efe	313	cmd.args[5] = 0x01;
a1dad50d	314	cmd.wlen = 6;
d87a5058	315	cmd.rlen = 4;
8fe51725	316	ret = si2157_cmd_execute(client, &cmd);
d87a5058 OS	317	if (ret)
	318	goto err;
	319
70f13ff0	320	if (dev->chiptype == SI2157_CHIPTYPE_SI2146)
073f3849 OS	321	memcpy(cmd.args, "\x14\x00\x02\x07\x00\x01", 6);
073f3849 OS	322	else
ee3c3e46 OS	323	memcpy(cmd.args, "\x14\x00\x02\x07\x00\x00", 6);
ee3c3e46 OS	324	cmd.args[4] = dev->if_port;
d87a5058 OS	325	cmd.wlen = 6;
d87a5058 OS	326	cmd.rlen = 4;
8fe51725	327	ret = si2157_cmd_execute(client, &cmd);
a1dad50d OS	328	if (ret)
	329	goto err;
	330
c28aebe1 OS	331	/* set if frequency if needed */
	332	if (if_frequency != dev->if_frequency) {
	333	memcpy(cmd.args, "\x14\x00\x06\x07", 4);
	334	cmd.args[4] = (if_frequency / 1000) & 0xff;
	335	cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
	336	cmd.wlen = 6;
	337	cmd.rlen = 4;
	338	ret = si2157_cmd_execute(client, &cmd);
	339	if (ret)
	340	goto err;
	341
	342	dev->if_frequency = if_frequency;
	343	}
	344
930a8730	345	/* set frequency */
b154121c	346	memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
930a8730 AP	347	cmd.args[4] = (c->frequency >> 0) & 0xff;
	348	cmd.args[5] = (c->frequency >> 8) & 0xff;
	349	cmd.args[6] = (c->frequency >> 16) & 0xff;
	350	cmd.args[7] = (c->frequency >> 24) & 0xff;
e6b4380f AP	351	cmd.wlen = 8;
e6b4380f AP	352	cmd.rlen = 1;
8fe51725	353	ret = si2157_cmd_execute(client, &cmd);
930a8730 AP	354	if (ret)
	355	goto err;
	356
	357	return 0;
	358	err:
8fe51725	359	dev_dbg(&client->dev, "failed=%d\n", ret);
930a8730 AP	360	return ret;
	361	}
	362
1140540d MS	363	static int si2157_get_if_frequency(struct dvb_frontend fe, u32 frequency)
1140540d MS	364	{
c28aebe1 OS	365	struct i2c_client *client = fe->tuner_priv;
	366	struct si2157_dev *dev = i2c_get_clientdata(client);
	367
	368	*frequency = dev->if_frequency;
1140540d MS	369	return 0;
	370	}
	371
6cc8a35d	372	static const struct dvb_tuner_ops si2157_ops = {
930a8730	373	.info = {
17ad09f1	374	.name = "Silicon Labs Si2146/2147/2148/2157/2158",
9398ddfe AK	375	.frequency_min = 42000000,
9398ddfe AK	376	.frequency_max = 870000000,
930a8730 AP	377	},
	378
	379	.init = si2157_init,
	380	.sleep = si2157_sleep,
	381	.set_params = si2157_set_params,
1140540d	382	.get_if_frequency = si2157_get_if_frequency,
930a8730 AP	383	};
930a8730 AP	384
2f1ea29f AP	385	static void si2157_stat_work(struct work_struct *work)
	386	{
	387	struct si2157_dev *dev = container_of(work, struct si2157_dev, stat_work.work);
	388	struct dvb_frontend *fe = dev->fe;
	389	struct i2c_client *client = fe->tuner_priv;
	390	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	391	struct si2157_cmd cmd;
	392	int ret;
	393
	394	dev_dbg(&client->dev, "\n");
	395
	396	memcpy(cmd.args, "\x42\x00", 2);
	397	cmd.wlen = 2;
	398	cmd.rlen = 12;
	399	ret = si2157_cmd_execute(client, &cmd);
	400	if (ret)
	401	goto err;
	402
	403	c->strength.stat[0].scale = FE_SCALE_DECIBEL;
	404	c->strength.stat[0].svalue = (s8) cmd.args[3] * 1000;
	405
	406	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
	407	return;
	408	err:
	409	c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
	410	dev_dbg(&client->dev, "failed=%d\n", ret);
	411	}
	412
930a8730	413	static int si2157_probe(struct i2c_client *client,
8b0a81c7	414	const struct i2c_device_id *id)
930a8730 AP	415	{
	416	struct si2157_config *cfg = client->dev.platform_data;
	417	struct dvb_frontend *fe = cfg->fe;
70f13ff0	418	struct si2157_dev *dev;
930a8730 AP	419	struct si2157_cmd cmd;
	420	int ret;
	421
70f13ff0 AP	422	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
70f13ff0 AP	423	if (!dev) {
930a8730	424	ret = -ENOMEM;
67d0113a	425	dev_err(&client->dev, "kzalloc() failed\n");
930a8730 AP	426	goto err;
	427	}
	428
8fe51725	429	i2c_set_clientdata(client, dev);
70f13ff0 AP	430	dev->fe = cfg->fe;
70f13ff0 AP	431	dev->inversion = cfg->inversion;
ee3c3e46	432	dev->if_port = cfg->if_port;
70f13ff0	433	dev->chiptype = (u8)id->driver_data;
c28aebe1	434	dev->if_frequency = 5000000; /* default value of property 0x0706 */
70f13ff0	435	mutex_init(&dev->i2c_mutex);
2f1ea29f	436	INIT_DELAYED_WORK(&dev->stat_work, si2157_stat_work);
930a8730 AP	437
930a8730 AP	438	/* check if the tuner is there */
e6b4380f AP	439	cmd.wlen = 0;
e6b4380f AP	440	cmd.rlen = 1;
8fe51725	441	ret = si2157_cmd_execute(client, &cmd);
930a8730	442	if (ret)
e7f3f9f3	443	goto err_kfree;
930a8730	444
70f13ff0	445	memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
8fe51725	446	fe->tuner_priv = client;
930a8730	447
8b0a81c7 MCC	448	#ifdef CONFIG_MEDIA_CONTROLLER
	449	if (cfg->mdev) {
	450	dev->mdev = cfg->mdev;
	451
	452	dev->ent.name = KBUILD_MODNAME;
	453	dev->ent.function = MEDIA_ENT_F_TUNER;
	454
	455	dev->pad[TUNER_PAD_RF_INPUT].flags = MEDIA_PAD_FL_SINK;
	456	dev->pad[TUNER_PAD_OUTPUT].flags = MEDIA_PAD_FL_SOURCE;
	457	dev->pad[TUNER_PAD_AUD_OUT].flags = MEDIA_PAD_FL_SOURCE;
	458
	459	ret = media_entity_pads_init(&dev->ent, TUNER_NUM_PADS,
	460	&dev->pad[0]);
	461
	462	if (ret)
	463	goto err_kfree;
	464
	465	ret = media_device_register_entity(cfg->mdev, &dev->ent);
	466	if (ret) {
	467	media_entity_cleanup(&dev->ent);
	468	goto err_kfree;
	469	}
	470	}
	471	#endif
	472
8fe51725	473	dev_info(&client->dev, "Silicon Labs %s successfully attached\n",
70f13ff0	474	dev->chiptype == SI2157_CHIPTYPE_SI2146 ?
17ad09f1	475	"Si2146" : "Si2147/2148/2157/2158");
073f3849	476
930a8730	477	return 0;
e7f3f9f3 AP	478
	479	err_kfree:
	480	kfree(dev);
930a8730	481	err:
67d0113a	482	dev_dbg(&client->dev, "failed=%d\n", ret);
930a8730 AP	483	return ret;
	484	}
	485
	486	static int si2157_remove(struct i2c_client *client)
	487	{
70f13ff0 AP	488	struct si2157_dev *dev = i2c_get_clientdata(client);
70f13ff0 AP	489	struct dvb_frontend *fe = dev->fe;
930a8730	490
67d0113a	491	dev_dbg(&client->dev, "\n");
930a8730	492
01d1d714 EMW	493	/* stop statistics polling */
	494	cancel_delayed_work_sync(&dev->stat_work);
	495
8b0a81c7 MCC	496	#ifdef CONFIG_MEDIA_CONTROLLER_DVB
	497	if (dev->mdev)
	498	media_device_unregister_entity(&dev->ent);
	499	#endif
	500
930a8730 AP	501	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
930a8730 AP	502	fe->tuner_priv = NULL;
70f13ff0	503	kfree(dev);
930a8730 AP	504
	505	return 0;
	506	}
	507
c1292233 AP	508	static const struct i2c_device_id si2157_id_table[] = {
	509	{"si2157", SI2157_CHIPTYPE_SI2157},
	510	{"si2146", SI2157_CHIPTYPE_SI2146},
930a8730 AP	511	{}
930a8730 AP	512	};
c1292233	513	MODULE_DEVICE_TABLE(i2c, si2157_id_table);
930a8730 AP	514
	515	static struct i2c_driver si2157_driver = {
	516	.driver = {
930a8730 AP	517	.name = "si2157",
	518	},
	519	.probe = si2157_probe,
	520	.remove = si2157_remove,
c1292233	521	.id_table = si2157_id_table,
930a8730 AP	522	};
	523
	524	module_i2c_driver(si2157_driver);
	525
17ad09f1	526	MODULE_DESCRIPTION("Silicon Labs Si2146/2147/2148/2157/2158 silicon tuner driver");
930a8730 AP	527	MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
930a8730 AP	528	MODULE_LICENSE("GPL");
bac53a2c	529	MODULE_FIRMWARE(SI2158_A20_FIRMWARE);