// SPDX-License-Identifier: GPL-2.0-only
/* Common methods for dibusb-based-receivers.
 *
 * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@posteo.de)
 *
 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
 */

#include "dibusb.h"

/* Max transfer size done by I2C transfer functions */
#define MAX_XFER_SIZE  64

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (1=info (|-able))." DVB_USB_DEBUG_STATUS);
MODULE_DESCRIPTION("Common methods for dibusb-based receivers");
MODULE_LICENSE("GPL");

#define deb_info(args...) dprintk(debug,0x01,args)

/* common stuff used by the different dibusb modules */
int dibusb_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
{
	if (adap->priv != NULL) {
		struct dibusb_state *st = adap->priv;
		if (st->ops.fifo_ctrl != NULL)
			if (st->ops.fifo_ctrl(adap->fe_adap[0].fe, onoff)) {
				err("error while controlling the fifo of the demod.");
				return -ENODEV;
			}
	}
	return 0;
}
EXPORT_SYMBOL(dibusb_streaming_ctrl);

int dibusb_pid_filter(struct dvb_usb_adapter *adap, int index, u16 pid, int onoff)
{
	if (adap->priv != NULL) {
		struct dibusb_state *st = adap->priv;
		if (st->ops.pid_ctrl != NULL)
			st->ops.pid_ctrl(adap->fe_adap[0].fe,
					 index, pid, onoff);
	}
	return 0;
}
EXPORT_SYMBOL(dibusb_pid_filter);

int dibusb_pid_filter_ctrl(struct dvb_usb_adapter *adap, int onoff)
{
	if (adap->priv != NULL) {
		struct dibusb_state *st = adap->priv;
		if (st->ops.pid_parse != NULL)
			if (st->ops.pid_parse(adap->fe_adap[0].fe, onoff) < 0)
				err("could not handle pid_parser");
	}
	return 0;
}
EXPORT_SYMBOL(dibusb_pid_filter_ctrl);

int dibusb_power_ctrl(struct dvb_usb_device *d, int onoff)
{
	u8 *b;
	int ret;

	b = kmalloc(3, GFP_KERNEL);
	if (!b)
		return -ENOMEM;

	b[0] = DIBUSB_REQ_SET_IOCTL;
	b[1] = DIBUSB_IOCTL_CMD_POWER_MODE;
	b[2] = onoff ? DIBUSB_IOCTL_POWER_WAKEUP : DIBUSB_IOCTL_POWER_SLEEP;

	ret = dvb_usb_generic_write(d, b, 3);

	kfree(b);

	msleep(10);

	return ret;
}
EXPORT_SYMBOL(dibusb_power_ctrl);

int dibusb2_0_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
{
	int ret;
	u8 *b;

	b = kmalloc(3, GFP_KERNEL);
	if (!b)
		return -ENOMEM;

	if ((ret = dibusb_streaming_ctrl(adap,onoff)) < 0)
		goto ret;

	if (onoff) {
		b[0] = DIBUSB_REQ_SET_STREAMING_MODE;
		b[1] = 0x00;
		ret = dvb_usb_generic_write(adap->dev, b, 2);
		if (ret  < 0)
			goto ret;
	}

	b[0] = DIBUSB_REQ_SET_IOCTL;
	b[1] = onoff ? DIBUSB_IOCTL_CMD_ENABLE_STREAM : DIBUSB_IOCTL_CMD_DISABLE_STREAM;
	ret = dvb_usb_generic_write(adap->dev, b, 3);

ret:
	kfree(b);
	return ret;
}
EXPORT_SYMBOL(dibusb2_0_streaming_ctrl);

int dibusb2_0_power_ctrl(struct dvb_usb_device *d, int onoff)
{
	u8 *b;
	int ret;

	if (!onoff)
		return 0;

	b = kmalloc(3, GFP_KERNEL);
	if (!b)
		return -ENOMEM;

	b[0] = DIBUSB_REQ_SET_IOCTL;
	b[1] = DIBUSB_IOCTL_CMD_POWER_MODE;
	b[2] = DIBUSB_IOCTL_POWER_WAKEUP;

	ret = dvb_usb_generic_write(d, b, 3);

	kfree(b);

	return ret;
}
EXPORT_SYMBOL(dibusb2_0_power_ctrl);

static int dibusb_i2c_msg(struct dvb_usb_device *d, u8 addr,
			  u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
{
	u8 *sndbuf;
	int ret, wo, len;

	/* write only ? */
	wo = (rbuf == NULL || rlen == 0);

	len = 2 + wlen + (wo ? 0 : 2);

	sndbuf = kmalloc(MAX_XFER_SIZE, GFP_KERNEL);
	if (!sndbuf)
		return -ENOMEM;

	if (4 + wlen > MAX_XFER_SIZE) {
		warn("i2c wr: len=%d is too big!\n", wlen);
		ret = -EOPNOTSUPP;
		goto ret;
	}

	sndbuf[0] = wo ? DIBUSB_REQ_I2C_WRITE : DIBUSB_REQ_I2C_READ;
	sndbuf[1] = (addr << 1) | (wo ? 0 : 1);

	memcpy(&sndbuf[2], wbuf, wlen);

	if (!wo) {
		sndbuf[wlen + 2] = (rlen >> 8) & 0xff;
		sndbuf[wlen + 3] = rlen & 0xff;
	}

	ret = dvb_usb_generic_rw(d, sndbuf, len, rbuf, rlen, 0);

ret:
	kfree(sndbuf);
	return ret;
}

/*
 * I2C master xfer function
 */
static int dibusb_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
{
	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	int i;

	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
		return -EAGAIN;

	for (i = 0; i < num; i++) {
		/* write/read request */
		if (i+1 < num && (msg[i].flags & I2C_M_RD) == 0
					  && (msg[i+1].flags & I2C_M_RD)) {
			if (dibusb_i2c_msg(d, msg[i].addr, msg[i].buf,msg[i].len,
						msg[i+1].buf,msg[i+1].len) < 0)
				break;
			i++;
		} else if ((msg[i].flags & I2C_M_RD) == 0) {
			if (dibusb_i2c_msg(d, msg[i].addr, msg[i].buf,msg[i].len,NULL,0) < 0)
				break;
		} else if (msg[i].addr != 0x50) {
			/* 0x50 is the address of the eeprom - we need to protect it
			 * from dibusb's bad i2c implementation: reads without
			 * writing the offset before are forbidden */
			if (dibusb_i2c_msg(d, msg[i].addr, NULL, 0, msg[i].buf, msg[i].len) < 0)
				break;
		}
	}

	mutex_unlock(&d->i2c_mutex);
	return i;
}

static u32 dibusb_i2c_func(struct i2c_adapter *adapter)
{
	return I2C_FUNC_I2C;
}

struct i2c_algorithm dibusb_i2c_algo = {
	.master_xfer   = dibusb_i2c_xfer,
	.functionality = dibusb_i2c_func,
};
EXPORT_SYMBOL(dibusb_i2c_algo);

int dibusb_read_eeprom_byte(struct dvb_usb_device *d, u8 offs, u8 *val)
{
	u8 *buf;
	int rc;

	buf = kzalloc(2, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	buf[0] = offs;

	rc = dibusb_i2c_msg(d, 0x50, &buf[0], 1, &buf[1], 1);
	*val = buf[1];
	kfree(buf);

	return rc;
}
EXPORT_SYMBOL(dibusb_read_eeprom_byte);

/*
 * common remote control stuff
 */
struct rc_map_table rc_map_dibusb_table[] = {
	/* Key codes for the little Artec T1/Twinhan/HAMA/ remote. */
	{ 0x0016, KEY_POWER },
	{ 0x0010, KEY_MUTE },
	{ 0x0003, KEY_1 },
	{ 0x0001, KEY_2 },
	{ 0x0006, KEY_3 },
	{ 0x0009, KEY_4 },
	{ 0x001d, KEY_5 },
	{ 0x001f, KEY_6 },
	{ 0x000d, KEY_7 },
	{ 0x0019, KEY_8 },
	{ 0x001b, KEY_9 },
	{ 0x0015, KEY_0 },
	{ 0x0005, KEY_CHANNELUP },
	{ 0x0002, KEY_CHANNELDOWN },
	{ 0x001e, KEY_VOLUMEUP },
	{ 0x000a, KEY_VOLUMEDOWN },
	{ 0x0011, KEY_RECORD },
	{ 0x0017, KEY_FAVORITES }, /* Heart symbol - Channel list. */
	{ 0x0014, KEY_PLAY },
	{ 0x001a, KEY_STOP },
	{ 0x0040, KEY_REWIND },
	{ 0x0012, KEY_FASTFORWARD },
	{ 0x000e, KEY_PREVIOUS }, /* Recall - Previous channel. */
	{ 0x004c, KEY_PAUSE },
	{ 0x004d, KEY_SCREEN }, /* Full screen mode. */
	{ 0x0054, KEY_AUDIO }, /* MTS - Switch to secondary audio. */
	/* additional keys TwinHan VisionPlus, the Artec seemingly not have */
	{ 0x000c, KEY_CANCEL }, /* Cancel */
	{ 0x001c, KEY_EPG }, /* EPG */
	{ 0x0000, KEY_TAB }, /* Tab */
	{ 0x0048, KEY_INFO }, /* Preview */
	{ 0x0004, KEY_LIST }, /* RecordList */
	{ 0x000f, KEY_TEXT }, /* Teletext */
	/* Key codes for the KWorld/ADSTech/JetWay remote. */
	{ 0x8612, KEY_POWER },
	{ 0x860f, KEY_SELECT }, /* source */
	{ 0x860c, KEY_UNKNOWN }, /* scan */
	{ 0x860b, KEY_EPG },
	{ 0x8610, KEY_MUTE },
	{ 0x8601, KEY_1 },
	{ 0x8602, KEY_2 },
	{ 0x8603, KEY_3 },
	{ 0x8604, KEY_4 },
	{ 0x8605, KEY_5 },
	{ 0x8606, KEY_6 },
	{ 0x8607, KEY_7 },
	{ 0x8608, KEY_8 },
	{ 0x8609, KEY_9 },
	{ 0x860a, KEY_0 },
	{ 0x8618, KEY_ZOOM },
	{ 0x861c, KEY_UNKNOWN }, /* preview */
	{ 0x8613, KEY_UNKNOWN }, /* snap */
	{ 0x8600, KEY_UNDO },
	{ 0x861d, KEY_RECORD },
	{ 0x860d, KEY_STOP },
	{ 0x860e, KEY_PAUSE },
	{ 0x8616, KEY_PLAY },
	{ 0x8611, KEY_BACK },
	{ 0x8619, KEY_FORWARD },
	{ 0x8614, KEY_UNKNOWN }, /* pip */
	{ 0x8615, KEY_ESC },
	{ 0x861a, KEY_UP },
	{ 0x861e, KEY_DOWN },
	{ 0x861f, KEY_LEFT },
	{ 0x861b, KEY_RIGHT },

	/* Key codes for the DiBcom MOD3000 remote. */
	{ 0x8000, KEY_MUTE },
	{ 0x8001, KEY_TEXT },
	{ 0x8002, KEY_HOME },
	{ 0x8003, KEY_POWER },

	{ 0x8004, KEY_RED },
	{ 0x8005, KEY_GREEN },
	{ 0x8006, KEY_YELLOW },
	{ 0x8007, KEY_BLUE },

	{ 0x8008, KEY_DVD },
	{ 0x8009, KEY_AUDIO },
	{ 0x800a, KEY_IMAGES },      /* Pictures */
	{ 0x800b, KEY_VIDEO },

	{ 0x800c, KEY_BACK },
	{ 0x800d, KEY_UP },
	{ 0x800e, KEY_RADIO },
	{ 0x800f, KEY_EPG },

	{ 0x8010, KEY_LEFT },
	{ 0x8011, KEY_OK },
	{ 0x8012, KEY_RIGHT },
	{ 0x8013, KEY_UNKNOWN },    /* SAP */

	{ 0x8014, KEY_TV },
	{ 0x8015, KEY_DOWN },
	{ 0x8016, KEY_MENU },       /* DVD Menu */
	{ 0x8017, KEY_LAST },

	{ 0x8018, KEY_RECORD },
	{ 0x8019, KEY_STOP },
	{ 0x801a, KEY_PAUSE },
	{ 0x801b, KEY_PLAY },

	{ 0x801c, KEY_PREVIOUS },
	{ 0x801d, KEY_REWIND },
	{ 0x801e, KEY_FASTFORWARD },
	{ 0x801f, KEY_NEXT},

	{ 0x8040, KEY_1 },
	{ 0x8041, KEY_2 },
	{ 0x8042, KEY_3 },
	{ 0x8043, KEY_CHANNELUP },

	{ 0x8044, KEY_4 },
	{ 0x8045, KEY_5 },
	{ 0x8046, KEY_6 },
	{ 0x8047, KEY_CHANNELDOWN },

	{ 0x8048, KEY_7 },
	{ 0x8049, KEY_8 },
	{ 0x804a, KEY_9 },
	{ 0x804b, KEY_VOLUMEUP },

	{ 0x804c, KEY_CLEAR },
	{ 0x804d, KEY_0 },
	{ 0x804e, KEY_ENTER },
	{ 0x804f, KEY_VOLUMEDOWN },
};
EXPORT_SYMBOL(rc_map_dibusb_table);

int dibusb_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
{
	u8 *buf;
	int ret;

	buf = kmalloc(5, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	buf[0] = DIBUSB_REQ_POLL_REMOTE;

	ret = dvb_usb_generic_rw(d, buf, 1, buf, 5, 0);
	if (ret < 0)
		goto ret;

	dvb_usb_nec_rc_key_to_event(d, buf, event, state);

	if (buf[0] != 0)
		deb_info("key: %*ph\n", 5, buf);

ret:
	kfree(buf);

	return ret;
}
EXPORT_SYMBOL(dibusb_rc_query);