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path: root/drivers/media/usb/dvb-usb-v2/gl861.c
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// SPDX-License-Identifier: GPL-2.0-only
/* DVB USB compliant linux driver for GL861 USB2.0 devices.
 *
 * see Documentation/media/dvb-drivers/dvb-usb.rst for more information
 */
#include <linux/string.h>

#include "gl861.h"

#include "zl10353.h"
#include "qt1010.h"
#include "tc90522.h"
#include "dvb-pll.h"

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
			 u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
{
	u16 index;
	u16 value = addr << (8 + 1);
	int wo = (rbuf == NULL || rlen == 0); /* write-only */
	u8 req, type;
	u8 *buf;
	int ret;

	if (wo) {
		req = GL861_REQ_I2C_WRITE;
		type = GL861_WRITE;
		buf = kmemdup(wbuf, wlen, GFP_KERNEL);
	} else { /* rw */
		req = GL861_REQ_I2C_READ;
		type = GL861_READ;
		buf = kmalloc(rlen, GFP_KERNEL);
	}
	if (!buf)
		return -ENOMEM;

	switch (wlen) {
	case 1:
		index = wbuf[0];
		break;
	case 2:
		index = wbuf[0];
		value = value + wbuf[1];
		break;
	default:
		dev_err(&d->udev->dev, "%s: wlen=%d, aborting\n",
				KBUILD_MODNAME, wlen);
		kfree(buf);
		return -EINVAL;
	}

	usleep_range(1000, 2000); /* avoid I2C errors */

	ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0), req, type,
			      value, index, buf, rlen, 2000);

	if (!wo && ret > 0)
		memcpy(rbuf, buf, rlen);

	kfree(buf);
	return ret;
}

/* I2C */
static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
			  int num)
{
	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	int i;

	if (num > 2)
		return -EINVAL;

	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+1].flags & I2C_M_RD)) {
			if (gl861_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 (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
					  msg[i].len, NULL, 0) < 0)
				break;
	}

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

static u32 gl861_i2c_func(struct i2c_adapter *adapter)
{
	return I2C_FUNC_I2C;
}

static struct i2c_algorithm gl861_i2c_algo = {
	.master_xfer   = gl861_i2c_xfer,
	.functionality = gl861_i2c_func,
};

/* Callbacks for DVB USB */
static struct zl10353_config gl861_zl10353_config = {
	.demod_address = 0x0f,
	.no_tuner = 1,
	.parallel_ts = 1,
};

static int gl861_frontend_attach(struct dvb_usb_adapter *adap)
{

	adap->fe[0] = dvb_attach(zl10353_attach, &gl861_zl10353_config,
		&adap_to_d(adap)->i2c_adap);
	if (adap->fe[0] == NULL)
		return -EIO;

	return 0;
}

static struct qt1010_config gl861_qt1010_config = {
	.i2c_address = 0x62
};

static int gl861_tuner_attach(struct dvb_usb_adapter *adap)
{
	return dvb_attach(qt1010_attach,
			  adap->fe[0], &adap_to_d(adap)->i2c_adap,
			  &gl861_qt1010_config) == NULL ? -ENODEV : 0;
}

static int gl861_init(struct dvb_usb_device *d)
{
	/*
	 * There is 2 interfaces. Interface 0 is for TV and interface 1 is
	 * for HID remote controller. Interface 0 has 2 alternate settings.
	 * For some reason we need to set interface explicitly, defaulted
	 * as alternate setting 1?
	 */
	return usb_set_interface(d->udev, 0, 0);
}

/* DVB USB Driver stuff */
static struct dvb_usb_device_properties gl861_props = {
	.driver_name = KBUILD_MODNAME,
	.owner = THIS_MODULE,
	.adapter_nr = adapter_nr,

	.i2c_algo = &gl861_i2c_algo,
	.frontend_attach = gl861_frontend_attach,
	.tuner_attach = gl861_tuner_attach,
	.init = gl861_init,

	.num_adapters = 1,
	.adapter = {
		{
			.stream = DVB_USB_STREAM_BULK(0x81, 7, 512),
		}
	}
};


/*
 * For Friio
 */

struct friio_priv {
	struct i2c_adapter *demod_sub_i2c;
	struct i2c_client  *i2c_client_demod;
	struct i2c_client  *i2c_client_tuner;
	struct i2c_adapter tuner_adap;
};

struct friio_config {
	struct i2c_board_info demod_info;
	struct tc90522_config demod_cfg;

	struct i2c_board_info tuner_info;
	struct dvb_pll_config tuner_cfg;
};

static const struct friio_config friio_config = {
	.demod_info = { I2C_BOARD_INFO(TC90522_I2C_DEV_TER, 0x18), },
	.tuner_info = { I2C_BOARD_INFO("tua6034_friio", 0x60), },
};

/* For another type of I2C:
 * message sent by a USB control-read/write transaction with data stage.
 * Used in init/config of Friio.
 */
static int
gl861_i2c_write_ex(struct dvb_usb_device *d, u8 addr, u8 *wbuf, u16 wlen)
{
	u8 *buf;
	int ret;

	buf = kmemdup(wbuf, wlen, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
				 GL861_REQ_I2C_RAW, GL861_WRITE,
				 addr << (8 + 1), 0x0100, buf, wlen, 2000);
	kfree(buf);
	return ret;
}

static int
gl861_i2c_read_ex(struct dvb_usb_device *d, u8 addr, u8 *rbuf, u16 rlen)
{
	u8 *buf;
	int ret;

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

	ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
				 GL861_REQ_I2C_READ, GL861_READ,
				 addr << (8 + 1), 0x0100, buf, rlen, 2000);
	if (ret > 0 && rlen > 0)
		memcpy(buf, rbuf, rlen);
	kfree(buf);
	return ret;
}

/* For I2C transactions to the tuner of Friio (dvb_pll).
 *
 * Friio uses irregular USB encapsulation for tuner i2c transactions:
 * write transacions are encapsulated with a different USB 'request' value.
 *
 * Although all transactions are sent via the demod(tc90522)
 * and the demod provides an i2c adapter for them, it cannot be used in Friio
 * since it assumes using the same parent adapter with the demod,
 * which does not use the request value and uses same one for both read/write.
 * So we define a dedicated i2c adapter here.
 */

static int
friio_i2c_tuner_read(struct dvb_usb_device *d, struct i2c_msg *msg)
{
	struct friio_priv *priv;
	u8 addr;

	priv = d_to_priv(d);
	addr = priv->i2c_client_demod->addr;
	return gl861_i2c_read_ex(d, addr, msg->buf, msg->len);
}

static int
friio_i2c_tuner_write(struct dvb_usb_device *d, struct i2c_msg *msg)
{
	u8 *buf;
	int ret;
	struct friio_priv *priv;

	priv = d_to_priv(d);

	if (msg->len < 1)
		return -EINVAL;

	buf = kmalloc(msg->len + 1, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;
	buf[0] = msg->addr << 1;
	memcpy(buf + 1, msg->buf, msg->len);

	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
				 GL861_REQ_I2C_RAW, GL861_WRITE,
				 priv->i2c_client_demod->addr << (8 + 1),
				 0xFE, buf, msg->len + 1, 2000);
	kfree(buf);
	return ret;
}

static int friio_tuner_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
				int num)
{
	struct dvb_usb_device *d = i2c_get_adapdata(adap);
	int i;

	if (num > 2)
		return -EINVAL;

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

	for (i = 0; i < num; i++) {
		int ret;

		if (msg[i].flags & I2C_M_RD)
			ret = friio_i2c_tuner_read(d, &msg[i]);
		else
			ret = friio_i2c_tuner_write(d, &msg[i]);

		if (ret < 0)
			break;

		usleep_range(1000, 2000); /* avoid I2C errors */
	}

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

static struct i2c_algorithm friio_tuner_i2c_algo = {
	.master_xfer   = friio_tuner_i2c_xfer,
	.functionality = gl861_i2c_func,
};

/* GPIO control in Friio */

#define FRIIO_CTL_LNB (1 << 0)
#define FRIIO_CTL_STROBE (1 << 1)
#define FRIIO_CTL_CLK (1 << 2)
#define FRIIO_CTL_LED (1 << 3)

#define FRIIO_LED_RUNNING 0x6400ff64
#define FRIIO_LED_STOPPED 0x96ff00ff

/* control PIC16F676 attached to Friio */
static int friio_ext_ctl(struct dvb_usb_device *d,
			    u32 sat_color, int power_on)
{
	int i, ret;
	struct i2c_msg msg;
	u8 *buf;
	u32 mask;
	u8 power = (power_on) ? FRIIO_CTL_LNB : 0;

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

	msg.addr = 0x00;
	msg.flags = 0;
	msg.len = 2;
	msg.buf = buf;
	buf[0] = 0x00;

	/* send 2bit header (&B10) */
	buf[1] = power | FRIIO_CTL_LED | FRIIO_CTL_STROBE;
	ret = i2c_transfer(&d->i2c_adap, &msg, 1);
	buf[1] |= FRIIO_CTL_CLK;
	ret += i2c_transfer(&d->i2c_adap, &msg, 1);

	buf[1] = power | FRIIO_CTL_STROBE;
	ret += i2c_transfer(&d->i2c_adap, &msg, 1);
	buf[1] |= FRIIO_CTL_CLK;
	ret += i2c_transfer(&d->i2c_adap, &msg, 1);

	/* send 32bit(satur, R, G, B) data in serial */
	mask = 1 << 31;
	for (i = 0; i < 32; i++) {
		buf[1] = power | FRIIO_CTL_STROBE;
		if (sat_color & mask)
			buf[1] |= FRIIO_CTL_LED;
		ret += i2c_transfer(&d->i2c_adap, &msg, 1);
		buf[1] |= FRIIO_CTL_CLK;
		ret += i2c_transfer(&d->i2c_adap, &msg, 1);
		mask >>= 1;
	}

	/* set the strobe off */
	buf[1] = power;
	ret += i2c_transfer(&d->i2c_adap, &msg, 1);
	buf[1] |= FRIIO_CTL_CLK;
	ret += i2c_transfer(&d->i2c_adap, &msg, 1);

	kfree(buf);
	return (ret == 70) ? 0 : -EREMOTEIO;
}

/* init/config of gl861 for Friio */
/* NOTE:
 * This function cannot be moved to friio_init()/dvb_usbv2_init(),
 * because the init defined here must be done before any activities like I2C,
 * but friio_init() is called by dvb-usbv2 after {_frontend, _tuner}_attach(),
 * where I2C communication is used.
 * Thus this function is set to be called from _power_ctl().
 *
 * Since it will be called on the early init stage
 * where the i2c adapter is not initialized yet,
 * we cannot use i2c_transfer() here.
 */
static int friio_reset(struct dvb_usb_device *d)
{
	int i, ret;
	u8 wbuf[2], rbuf[2];

	static const u8 friio_init_cmds[][2] = {
		{0x33, 0x08}, {0x37, 0x40}, {0x3a, 0x1f}, {0x3b, 0xff},
		{0x3c, 0x1f}, {0x3d, 0xff}, {0x38, 0x00}, {0x35, 0x00},
		{0x39, 0x00}, {0x36, 0x00},
	};

	ret = usb_set_interface(d->udev, 0, 0);
	if (ret < 0)
		return ret;

	wbuf[0] = 0x11;
	wbuf[1] = 0x02;
	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
	if (ret < 0)
		return ret;
	usleep_range(2000, 3000);

	wbuf[0] = 0x11;
	wbuf[1] = 0x00;
	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
	if (ret < 0)
		return ret;

	/*
	 * Check if the dev is really a Friio White, since it might be
	 * another device, Friio Black, with the same VID/PID.
	 */

	usleep_range(1000, 2000);
	wbuf[0] = 0x03;
	wbuf[1] = 0x80;
	ret = gl861_i2c_write_ex(d, 0x09, wbuf, 2);
	if (ret < 0)
		return ret;

	usleep_range(2000, 3000);
	ret = gl861_i2c_read_ex(d, 0x09, rbuf, 2);
	if (ret < 0)
		return ret;
	if (rbuf[0] != 0xff || rbuf[1] != 0xff)
		return -ENODEV;


	usleep_range(1000, 2000);
	ret = gl861_i2c_write_ex(d, 0x48, wbuf, 2);
	if (ret < 0)
		return ret;

	usleep_range(2000, 3000);
	ret = gl861_i2c_read_ex(d, 0x48, rbuf, 2);
	if (ret < 0)
		return ret;
	if (rbuf[0] != 0xff || rbuf[1] != 0xff)
		return -ENODEV;

	wbuf[0] = 0x30;
	wbuf[1] = 0x04;
	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
	if (ret < 0)
		return ret;

	wbuf[0] = 0x00;
	wbuf[1] = 0x01;
	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
	if (ret < 0)
		return ret;

	wbuf[0] = 0x06;
	wbuf[1] = 0x0f;
	ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
	if (ret < 0)
		return ret;

	for (i = 0; i < ARRAY_SIZE(friio_init_cmds); i++) {
		ret = gl861_i2c_msg(d, 0x00, (u8 *)friio_init_cmds[i], 2,
				      NULL, 0);
		if (ret < 0)
			return ret;
	}
	return 0;
}

/*
 * DVB callbacks for Friio
 */

static int friio_power_ctrl(struct dvb_usb_device *d, int onoff)
{
	return onoff ? friio_reset(d) : 0;
}

static int friio_frontend_attach(struct dvb_usb_adapter *adap)
{
	const struct i2c_board_info *info;
	struct dvb_usb_device *d;
	struct tc90522_config cfg;
	struct i2c_client *cl;
	struct friio_priv *priv;

	info = &friio_config.demod_info;
	d = adap_to_d(adap);
	cl = dvb_module_probe("tc90522", info->type,
			      &d->i2c_adap, info->addr, &cfg);
	if (!cl)
		return -ENODEV;
	adap->fe[0] = cfg.fe;

	/* ignore cfg.tuner_i2c and create new one */
	priv = adap_to_priv(adap);
	priv->i2c_client_demod = cl;
	priv->tuner_adap.algo = &friio_tuner_i2c_algo;
	priv->tuner_adap.dev.parent = &d->udev->dev;
	strscpy(priv->tuner_adap.name, d->name, sizeof(priv->tuner_adap.name));
	strlcat(priv->tuner_adap.name, "-tuner", sizeof(priv->tuner_adap.name));
	priv->demod_sub_i2c = &priv->tuner_adap;
	i2c_set_adapdata(&priv->tuner_adap, d);

	return i2c_add_adapter(&priv->tuner_adap);
}

static int friio_frontend_detach(struct dvb_usb_adapter *adap)
{
	struct friio_priv *priv;

	priv = adap_to_priv(adap);
	i2c_del_adapter(&priv->tuner_adap);
	dvb_module_release(priv->i2c_client_demod);
	return 0;
}

static int friio_tuner_attach(struct dvb_usb_adapter *adap)
{
	const struct i2c_board_info *info;
	struct dvb_pll_config cfg;
	struct i2c_client *cl;
	struct friio_priv *priv;

	priv = adap_to_priv(adap);
	info = &friio_config.tuner_info;
	cfg = friio_config.tuner_cfg;
	cfg.fe = adap->fe[0];

	cl = dvb_module_probe("dvb_pll", info->type,
			      priv->demod_sub_i2c, info->addr, &cfg);
	if (!cl)
		return -ENODEV;
	priv->i2c_client_tuner = cl;
	return 0;
}

static int friio_tuner_detach(struct dvb_usb_adapter *adap)
{
	struct friio_priv *priv;

	priv = adap_to_priv(adap);
	dvb_module_release(priv->i2c_client_tuner);
	return 0;
}

static int friio_init(struct dvb_usb_device *d)
{
	int i;
	int ret;
	struct friio_priv *priv;

	static const u8 demod_init[][2] = {
		{0x01, 0x40}, {0x04, 0x38}, {0x05, 0x40}, {0x07, 0x40},
		{0x0f, 0x4f}, {0x11, 0x21}, {0x12, 0x0b}, {0x13, 0x2f},
		{0x14, 0x31}, {0x16, 0x02}, {0x21, 0xc4}, {0x22, 0x20},
		{0x2c, 0x79}, {0x2d, 0x34}, {0x2f, 0x00}, {0x30, 0x28},
		{0x31, 0x31}, {0x32, 0xdf}, {0x38, 0x01}, {0x39, 0x78},
		{0x3b, 0x33}, {0x3c, 0x33}, {0x48, 0x90}, {0x51, 0x68},
		{0x5e, 0x38}, {0x71, 0x00}, {0x72, 0x08}, {0x77, 0x00},
		{0xc0, 0x21}, {0xc1, 0x10}, {0xe4, 0x1a}, {0xea, 0x1f},
		{0x77, 0x00}, {0x71, 0x00}, {0x71, 0x00}, {0x76, 0x0c},
	};

	/* power on LNA? */
	ret = friio_ext_ctl(d, FRIIO_LED_STOPPED, true);
	if (ret < 0)
		return ret;
	msleep(20);

	/* init/config demod */
	priv = d_to_priv(d);
	for (i = 0; i < ARRAY_SIZE(demod_init); i++) {
		int ret;

		ret = i2c_master_send(priv->i2c_client_demod, demod_init[i], 2);
		if (ret < 0)
			return ret;
	}
	msleep(100);
	return 0;
}

static void friio_exit(struct dvb_usb_device *d)
{
	friio_ext_ctl(d, FRIIO_LED_STOPPED, false);
}

static int friio_streaming_ctrl(struct dvb_frontend *fe, int onoff)
{
	u32 led_color;

	led_color = onoff ? FRIIO_LED_RUNNING : FRIIO_LED_STOPPED;
	return friio_ext_ctl(fe_to_d(fe), led_color, true);
}


static struct dvb_usb_device_properties friio_props = {
	.driver_name = KBUILD_MODNAME,
	.owner = THIS_MODULE,
	.adapter_nr = adapter_nr,

	.size_of_priv = sizeof(struct friio_priv),

	.i2c_algo = &gl861_i2c_algo,
	.power_ctrl = friio_power_ctrl,
	.frontend_attach = friio_frontend_attach,
	.frontend_detach = friio_frontend_detach,
	.tuner_attach = friio_tuner_attach,
	.tuner_detach = friio_tuner_detach,
	.init = friio_init,
	.exit = friio_exit,
	.streaming_ctrl = friio_streaming_ctrl,

	.num_adapters = 1,
	.adapter = {
		{
			.stream = DVB_USB_STREAM_BULK(0x01, 8, 16384),
		}
	}
};

static const struct usb_device_id gl861_id_table[] = {
	{ DVB_USB_DEVICE(USB_VID_MSI, USB_PID_MSI_MEGASKY580_55801,
		&gl861_props, "MSI Mega Sky 55801 DVB-T USB2.0", NULL) },
	{ DVB_USB_DEVICE(USB_VID_ALINK, USB_VID_ALINK_DTU,
		&gl861_props, "A-LINK DTU DVB-T USB2.0", NULL) },
	{ DVB_USB_DEVICE(USB_VID_774, USB_PID_FRIIO_WHITE,
		&friio_props, "774 Friio White ISDB-T USB2.0", NULL) },
	{ }
};
MODULE_DEVICE_TABLE(usb, gl861_id_table);

static struct usb_driver gl861_usb_driver = {
	.name = KBUILD_MODNAME,
	.id_table = gl861_id_table,
	.probe = dvb_usbv2_probe,
	.disconnect = dvb_usbv2_disconnect,
	.suspend = dvb_usbv2_suspend,
	.resume = dvb_usbv2_resume,
	.reset_resume = dvb_usbv2_reset_resume,
	.no_dynamic_id = 1,
	.soft_unbind = 1,
};

module_usb_driver(gl861_usb_driver);

MODULE_AUTHOR("Carl Lundqvist <comabug@gmail.com>");
MODULE_DESCRIPTION("Driver MSI Mega Sky 580 DVB-T USB2.0 / GL861");
MODULE_VERSION("0.1");
MODULE_LICENSE("GPL");