drivers/media/dvb-frontends/sp2.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * CIMaX SP2/SP2HF (Atmel T90FJR) CI driver
  *
  * Copyright (C) 2014 Olli Salonen <olli.salonen@iki.fi>
  *
  * Heavily based on CIMax2(R) SP2 driver in conjunction with NetUp Dual
  * DVB-S2 CI card (cimax2) with following copyrights:
  *
  *  Copyright (C) 2009 NetUP Inc.
  *  Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
  *  Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
  */

 #include "sp2_priv.h"

 static int sp2_read_i2c(struct sp2 *s, u8 reg, u8 *buf, int len)
 {
 	int ret;
 	struct i2c_client *client = s->client;
 	struct i2c_adapter *adap = client->adapter;
 	struct i2c_msg msg[] = {
 		{
 			.addr = client->addr,
 			.flags = 0,
 			.buf = &reg,
 			.len = 1
 		}, {
 			.addr = client->addr,
 			.flags	= I2C_M_RD,
 			.buf = buf,
 			.len = len
 		}
 	};

 	ret = i2c_transfer(adap, msg, 2);

 	if (ret != 2) {
 		dev_err(&client->dev, "i2c read error, reg = 0x%02x, status = %d\n",
 				reg, ret);
 		if (ret < 0)
 			return ret;
 		else
 			return -EIO;
 	}

 	dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %02x\n",
 				client->addr, reg, buf[0]);

 	return 0;
 }

 static int sp2_write_i2c(struct sp2 *s, u8 reg, u8 *buf, int len)
 {
 	int ret;
 	u8 buffer[35];
 	struct i2c_client *client = s->client;
 	struct i2c_adapter *adap = client->adapter;
 	struct i2c_msg msg = {
 		.addr = client->addr,
 		.flags = 0,
 		.buf = &buffer[0],
 		.len = len + 1
 	};

 	if ((len + 1) > sizeof(buffer)) {
 		dev_err(&client->dev, "i2c wr reg=%02x: len=%d is too big!\n",
 				reg, len);
 		return -EINVAL;
 	}

 	buffer[0] = reg;
 	memcpy(&buffer[1], buf, len);

 	ret = i2c_transfer(adap, &msg, 1);

 	if (ret != 1) {
 		dev_err(&client->dev, "i2c write error, reg = 0x%02x, status = %d\n",
 				reg, ret);
 		if (ret < 0)
 			return ret;
 		else
 			return -EIO;
 	}

 	dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %*ph\n",
 				client->addr, reg, len, buf);

 	return 0;
 }

 static int sp2_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot, u8 acs,
 			u8 read, int addr, u8 data)
 {
 	struct sp2 *s = en50221->data;
 	u8 store;
 	int mem, ret;
 	int (*ci_op_cam)(void*, u8, int, u8, int*) = s->ci_control;

 	if (slot != 0)
 		return -EINVAL;

 	/*
 	 * change module access type between IO space and attribute memory
 	 * when needed
 	 */
 	if (s->module_access_type != acs) {
 		ret = sp2_read_i2c(s, 0x00, &store, 1);

 		if (ret)
 			return ret;

 		store &= ~(SP2_MOD_CTL_ACS1 | SP2_MOD_CTL_ACS0);
 		store |= acs;

 		ret = sp2_write_i2c(s, 0x00, &store, 1);
 		if (ret)
 			return ret;
 	}

 	s->module_access_type = acs;

 	/* implementation of ci_op_cam is device specific */
 	if (ci_op_cam) {
 		ret = ci_op_cam(s->priv, read, addr, data, &mem);
 	} else {
 		dev_err(&s->client->dev, "callback not defined");
 		return -EINVAL;
 	}

 	if (ret)
 		return ret;

 	dev_dbg(&s->client->dev, "%s: slot=%d, addr=0x%04x, %s, data=%x",
 			(read) ? "read" : "write", slot, addr,
 			(acs == SP2_CI_ATTR_ACS) ? "attr" : "io",
 			(read) ? mem : data);

 	if (read)
 		return mem;
 	else
 		return 0;

 }

 int sp2_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
 				int slot, int addr)
 {
 	return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,
 			SP2_CI_RD, addr, 0);
 }

 int sp2_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
 				int slot, int addr, u8 data)
 {
 	return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,
 			SP2_CI_WR, addr, data);
 }

 int sp2_ci_read_cam_control(struct dvb_ca_en50221 *en50221,
 				int slot, u8 addr)
 {
 	return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,
 			SP2_CI_RD, addr, 0);
 }

 int sp2_ci_write_cam_control(struct dvb_ca_en50221 *en50221,
 				int slot, u8 addr, u8 data)
 {
 	return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,
 			SP2_CI_WR, addr, data);
 }

 int sp2_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
 {
 	struct sp2 *s = en50221->data;
 	u8 buf;
 	int ret;

 	dev_dbg(&s->client->dev, "slot: %d\n", slot);

 	if (slot != 0)
 		return -EINVAL;

 	/* RST on */
 	buf = SP2_MOD_CTL_RST;
 	ret = sp2_write_i2c(s, 0x00, &buf, 1);

 	if (ret)
 		return ret;

 	usleep_range(500, 600);

 	/* RST off */
 	buf = 0x00;
 	ret = sp2_write_i2c(s, 0x00, &buf, 1);

 	if (ret)
 		return ret;

 	msleep(1000);

 	return 0;
 }

 int sp2_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
 {
 	struct sp2 *s = en50221->data;

 	dev_dbg(&s->client->dev, "slot:%d\n", slot);

 	/* not implemented */
 	return 0;
 }

 int sp2_ci_slot_ts_enable(struct dvb_ca_en50221 *en50221, int slot)
 {
 	struct sp2 *s = en50221->data;
 	u8 buf;

 	dev_dbg(&s->client->dev, "slot:%d\n", slot);

 	if (slot != 0)
 		return -EINVAL;

 	sp2_read_i2c(s, 0x00, &buf, 1);

 	/* disable bypass and enable TS */
 	buf |= (SP2_MOD_CTL_TSOEN | SP2_MOD_CTL_TSIEN);
 	return sp2_write_i2c(s, 0, &buf, 1);
 }

 int sp2_ci_poll_slot_status(struct dvb_ca_en50221 *en50221,
 				int slot, int open)
 {
 	struct sp2 *s = en50221->data;
 	u8 buf[2];
 	int ret;

 	dev_dbg(&s->client->dev, "slot:%d open:%d\n", slot, open);

 	/*
 	 * CAM module INSERT/REMOVE processing. Slow operation because of i2c
 	 * transfers. Throttle read to one per sec.
 	 */
 	if (time_after(jiffies, s->next_status_checked_time)) {
 		ret = sp2_read_i2c(s, 0x00, buf, 1);
 		s->next_status_checked_time = jiffies +	msecs_to_jiffies(1000);

 		if (ret)
 			return 0;

 		if (buf[0] & SP2_MOD_CTL_DET)
 			s->status = DVB_CA_EN50221_POLL_CAM_PRESENT |
 					DVB_CA_EN50221_POLL_CAM_READY;
 		else
 			s->status = 0;
 	}

 	return s->status;
 }

 static int sp2_init(struct sp2 *s)
 {
 	int ret = 0;
 	u8 buf;
 	u8 cimax_init[34] = {
 		0x00, /* module A control*/
 		0x00, /* auto select mask high A */
 		0x00, /* auto select mask low A */
 		0x00, /* auto select pattern high A */
 		0x00, /* auto select pattern low A */
 		0x44, /* memory access time A, 600 ns */
 		0x00, /* invert input A */
 		0x00, /* RFU */
 		0x00, /* RFU */
 		0x00, /* module B control*/
 		0x00, /* auto select mask high B */
 		0x00, /* auto select mask low B */
 		0x00, /* auto select pattern high B */
 		0x00, /* auto select pattern low B */
 		0x44, /* memory access time B, 600 ns */
 		0x00, /* invert input B */
 		0x00, /* RFU */
 		0x00, /* RFU */
 		0x00, /* auto select mask high Ext */
 		0x00, /* auto select mask low Ext */
 		0x00, /* auto select pattern high Ext */
 		0x00, /* auto select pattern low Ext */
 		0x00, /* RFU */
 		0x02, /* destination - module A */
 		0x01, /* power control reg, VCC power on */
 		0x00, /* RFU */
 		0x00, /* int status read only */
 		0x00, /* Interrupt Mask Register */
 		0x05, /* EXTINT=active-high, INT=push-pull */
 		0x00, /* USCG1 */
 		0x04, /* ack active low */
 		0x00, /* LOCK = 0 */
 		0x22, /* unknown */
 		0x00, /* synchronization? */
 	};

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

 	s->ca.owner = THIS_MODULE;
 	s->ca.read_attribute_mem = sp2_ci_read_attribute_mem;
 	s->ca.write_attribute_mem = sp2_ci_write_attribute_mem;
 	s->ca.read_cam_control = sp2_ci_read_cam_control;
 	s->ca.write_cam_control = sp2_ci_write_cam_control;
 	s->ca.slot_reset = sp2_ci_slot_reset;
 	s->ca.slot_shutdown = sp2_ci_slot_shutdown;
 	s->ca.slot_ts_enable = sp2_ci_slot_ts_enable;
 	s->ca.poll_slot_status = sp2_ci_poll_slot_status;
 	s->ca.data = s;
 	s->module_access_type = 0;

 	/* initialize all regs */
 	ret = sp2_write_i2c(s, 0x00, &cimax_init[0], 34);
 	if (ret)
 		goto err;

 	/* lock registers */
 	buf = 1;
 	ret = sp2_write_i2c(s, 0x1f, &buf, 1);
 	if (ret)
 		goto err;

 	/* power on slots */
 	ret = sp2_write_i2c(s, 0x18, &buf, 1);
 	if (ret)
 		goto err;

 	ret = dvb_ca_en50221_init(s->dvb_adap, &s->ca, 0, 1);
 	if (ret)
 		goto err;

 	return 0;

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

 static int sp2_exit(struct i2c_client *client)
 {
 	struct sp2 *s;

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

 	if (!client)
 		return 0;

 	s = i2c_get_clientdata(client);
 	if (!s)
 		return 0;

 	if (!s->ca.data)
 		return 0;

 	dvb_ca_en50221_release(&s->ca);

 	return 0;
 }

 static int sp2_probe(struct i2c_client *client,
 		const struct i2c_device_id *id)
 {
 	struct sp2_config *cfg = client->dev.platform_data;
 	struct sp2 *s;
 	int ret;

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

 	s = kzalloc(sizeof(*s), GFP_KERNEL);
 	if (!s) {
 		ret = -ENOMEM;
 		goto err;
 	}

 	s->client = client;
 	s->dvb_adap = cfg->dvb_adap;
 	s->priv = cfg->priv;
 	s->ci_control = cfg->ci_control;

 	i2c_set_clientdata(client, s);

 	ret = sp2_init(s);
 	if (ret)
 		goto err;

 	dev_info(&s->client->dev, "CIMaX SP2 successfully attached\n");
 	return 0;
 err:
 	dev_dbg(&client->dev, "init failed=%d\n", ret);
 	kfree(s);

 	return ret;
 }

 static int sp2_remove(struct i2c_client *client)
 {
 	struct sp2 *s = i2c_get_clientdata(client);

 	dev_dbg(&client->dev, "\n");
 	sp2_exit(client);
 	kfree(s);
 	return 0;
 }

 static const struct i2c_device_id sp2_id[] = {
 	{"sp2", 0},
 	{}
 };
 MODULE_DEVICE_TABLE(i2c, sp2_id);

 static struct i2c_driver sp2_driver = {
 	.driver = {
 		.name	= "sp2",
 	},
 	.probe		= sp2_probe,
 	.remove		= sp2_remove,
 	.id_table	= sp2_id,
 };

 module_i2c_driver(sp2_driver);

 MODULE_DESCRIPTION("CIMaX SP2/HF CI driver");
 MODULE_AUTHOR("Olli Salonen <olli.salonen@iki.fi>");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* CIMaX SP2/SP2HF (Atmel T90FJR) CI driver
	*
	* Copyright (C) 2014 Olli Salonen <olli.salonen@iki.fi>
	*
	* Heavily based on CIMax2(R) SP2 driver in conjunction with NetUp Dual
	* DVB-S2 CI card (cimax2) with following copyrights:
	*
	* Copyright (C) 2009 NetUP Inc.
	* Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
	* Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
	*/

	#include "sp2_priv.h"

	static int sp2_read_i2c(struct sp2 s, u8 reg, u8 buf, int len)
	{
	int ret;
	struct i2c_client *client = s->client;
	struct i2c_adapter *adap = client->adapter;
	struct i2c_msg msg[] = {
	{
	.addr = client->addr,
	.flags = 0,
	.buf = &reg,
	.len = 1
	}, {
	.addr = client->addr,
	.flags = I2C_M_RD,
	.buf = buf,
	.len = len
	}
	};

	ret = i2c_transfer(adap, msg, 2);

	if (ret != 2) {
	dev_err(&client->dev, "i2c read error, reg = 0x%02x, status = %d\n",
	reg, ret);
	if (ret < 0)
	return ret;
	else
	return -EIO;
	}

	dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %02x\n",
	client->addr, reg, buf[0]);

	return 0;
	}

	static int sp2_write_i2c(struct sp2 s, u8 reg, u8 buf, int len)
	{
	int ret;
	u8 buffer[35];
	struct i2c_client *client = s->client;
	struct i2c_adapter *adap = client->adapter;
	struct i2c_msg msg = {
	.addr = client->addr,
	.flags = 0,
	.buf = &buffer[0],
	.len = len + 1
	};

	if ((len + 1) > sizeof(buffer)) {
	dev_err(&client->dev, "i2c wr reg=%02x: len=%d is too big!\n",
	reg, len);
	return -EINVAL;
	}

	buffer[0] = reg;
	memcpy(&buffer[1], buf, len);

	ret = i2c_transfer(adap, &msg, 1);

	if (ret != 1) {
	dev_err(&client->dev, "i2c write error, reg = 0x%02x, status = %d\n",
	reg, ret);
	if (ret < 0)
	return ret;
	else
	return -EIO;
	}

	dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %*ph\n",
	client->addr, reg, len, buf);

	return 0;
	}

	static int sp2_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot, u8 acs,
	u8 read, int addr, u8 data)
	{
	struct sp2 *s = en50221->data;
	u8 store;
	int mem, ret;
	int (ci_op_cam)(void, u8, int, u8, int*) = s->ci_control;

	if (slot != 0)
	return -EINVAL;

	/*
	* change module access type between IO space and attribute memory
	* when needed
	*/
	if (s->module_access_type != acs) {
	ret = sp2_read_i2c(s, 0x00, &store, 1);

	if (ret)
	return ret;

	store &= ~(SP2_MOD_CTL_ACS1 \| SP2_MOD_CTL_ACS0);
	store \|= acs;

	ret = sp2_write_i2c(s, 0x00, &store, 1);
	if (ret)
	return ret;
	}

	s->module_access_type = acs;

	/* implementation of ci_op_cam is device specific */
	if (ci_op_cam) {
	ret = ci_op_cam(s->priv, read, addr, data, &mem);
	} else {
	dev_err(&s->client->dev, "callback not defined");
	return -EINVAL;
	}

	if (ret)
	return ret;

	dev_dbg(&s->client->dev, "%s: slot=%d, addr=0x%04x, %s, data=%x",
	(read) ? "read" : "write", slot, addr,
	(acs == SP2_CI_ATTR_ACS) ? "attr" : "io",
	(read) ? mem : data);

	if (read)
	return mem;
	else
	return 0;

	}

	int sp2_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
	int slot, int addr)
	{
	return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,
	SP2_CI_RD, addr, 0);
	}

	int sp2_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
	int slot, int addr, u8 data)
	{
	return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,
	SP2_CI_WR, addr, data);
	}

	int sp2_ci_read_cam_control(struct dvb_ca_en50221 *en50221,
	int slot, u8 addr)
	{
	return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,
	SP2_CI_RD, addr, 0);
	}

	int sp2_ci_write_cam_control(struct dvb_ca_en50221 *en50221,
	int slot, u8 addr, u8 data)
	{
	return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,
	SP2_CI_WR, addr, data);
	}

	int sp2_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
	{
	struct sp2 *s = en50221->data;
	u8 buf;
	int ret;

	dev_dbg(&s->client->dev, "slot: %d\n", slot);

	if (slot != 0)
	return -EINVAL;

	/* RST on */
	buf = SP2_MOD_CTL_RST;
	ret = sp2_write_i2c(s, 0x00, &buf, 1);

	if (ret)
	return ret;

	usleep_range(500, 600);

	/* RST off */
	buf = 0x00;
	ret = sp2_write_i2c(s, 0x00, &buf, 1);

	if (ret)
	return ret;

	msleep(1000);

	return 0;
	}

	int sp2_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
	{
	struct sp2 *s = en50221->data;

	dev_dbg(&s->client->dev, "slot:%d\n", slot);

	/* not implemented */
	return 0;
	}

	int sp2_ci_slot_ts_enable(struct dvb_ca_en50221 *en50221, int slot)
	{
	struct sp2 *s = en50221->data;
	u8 buf;

	dev_dbg(&s->client->dev, "slot:%d\n", slot);

	if (slot != 0)
	return -EINVAL;

	sp2_read_i2c(s, 0x00, &buf, 1);

	/* disable bypass and enable TS */
	buf \|= (SP2_MOD_CTL_TSOEN \| SP2_MOD_CTL_TSIEN);
	return sp2_write_i2c(s, 0, &buf, 1);
	}

	int sp2_ci_poll_slot_status(struct dvb_ca_en50221 *en50221,
	int slot, int open)
	{
	struct sp2 *s = en50221->data;
	u8 buf[2];
	int ret;

	dev_dbg(&s->client->dev, "slot:%d open:%d\n", slot, open);

	/*
	* CAM module INSERT/REMOVE processing. Slow operation because of i2c
	* transfers. Throttle read to one per sec.
	*/
	if (time_after(jiffies, s->next_status_checked_time)) {
	ret = sp2_read_i2c(s, 0x00, buf, 1);
	s->next_status_checked_time = jiffies + msecs_to_jiffies(1000);

	if (ret)
	return 0;

	if (buf[0] & SP2_MOD_CTL_DET)
	s->status = DVB_CA_EN50221_POLL_CAM_PRESENT \|
	DVB_CA_EN50221_POLL_CAM_READY;
	else
	s->status = 0;
	}

	return s->status;
	}

	static int sp2_init(struct sp2 *s)
	{
	int ret = 0;
	u8 buf;
	u8 cimax_init[34] = {
	0x00, /* module A control*/
	0x00, /* auto select mask high A */
	0x00, /* auto select mask low A */
	0x00, /* auto select pattern high A */
	0x00, /* auto select pattern low A */
	0x44, /* memory access time A, 600 ns */
	0x00, /* invert input A */
	0x00, /* RFU */
	0x00, /* RFU */
	0x00, /* module B control*/
	0x00, /* auto select mask high B */
	0x00, /* auto select mask low B */
	0x00, /* auto select pattern high B */
	0x00, /* auto select pattern low B */
	0x44, /* memory access time B, 600 ns */
	0x00, /* invert input B */
	0x00, /* RFU */
	0x00, /* RFU */
	0x00, /* auto select mask high Ext */
	0x00, /* auto select mask low Ext */
	0x00, /* auto select pattern high Ext */
	0x00, /* auto select pattern low Ext */
	0x00, /* RFU */
	0x02, /* destination - module A */
	0x01, /* power control reg, VCC power on */
	0x00, /* RFU */
	0x00, /* int status read only */
	0x00, /* Interrupt Mask Register */
	0x05, /* EXTINT=active-high, INT=push-pull */
	0x00, /* USCG1 */
	0x04, /* ack active low */
	0x00, /* LOCK = 0 */
	0x22, /* unknown */
	0x00, /* synchronization? */
	};

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

	s->ca.owner = THIS_MODULE;
	s->ca.read_attribute_mem = sp2_ci_read_attribute_mem;
	s->ca.write_attribute_mem = sp2_ci_write_attribute_mem;
	s->ca.read_cam_control = sp2_ci_read_cam_control;
	s->ca.write_cam_control = sp2_ci_write_cam_control;
	s->ca.slot_reset = sp2_ci_slot_reset;
	s->ca.slot_shutdown = sp2_ci_slot_shutdown;
	s->ca.slot_ts_enable = sp2_ci_slot_ts_enable;
	s->ca.poll_slot_status = sp2_ci_poll_slot_status;
	s->ca.data = s;
	s->module_access_type = 0;

	/* initialize all regs */
	ret = sp2_write_i2c(s, 0x00, &cimax_init[0], 34);
	if (ret)
	goto err;

	/* lock registers */
	buf = 1;
	ret = sp2_write_i2c(s, 0x1f, &buf, 1);
	if (ret)
	goto err;

	/* power on slots */
	ret = sp2_write_i2c(s, 0x18, &buf, 1);
	if (ret)
	goto err;

	ret = dvb_ca_en50221_init(s->dvb_adap, &s->ca, 0, 1);
	if (ret)
	goto err;

	return 0;

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

	static int sp2_exit(struct i2c_client *client)
	{
	struct sp2 *s;

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

	if (!client)
	return 0;

	s = i2c_get_clientdata(client);
	if (!s)
	return 0;

	if (!s->ca.data)
	return 0;

	dvb_ca_en50221_release(&s->ca);

	return 0;
	}

	static int sp2_probe(struct i2c_client *client,
	const struct i2c_device_id *id)
	{
	struct sp2_config *cfg = client->dev.platform_data;
	struct sp2 *s;
	int ret;

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

	s = kzalloc(sizeof(*s), GFP_KERNEL);
	if (!s) {
	ret = -ENOMEM;
	goto err;
	}

	s->client = client;
	s->dvb_adap = cfg->dvb_adap;
	s->priv = cfg->priv;
	s->ci_control = cfg->ci_control;

	i2c_set_clientdata(client, s);

	ret = sp2_init(s);
	if (ret)
	goto err;

	dev_info(&s->client->dev, "CIMaX SP2 successfully attached\n");
	return 0;
	err:
	dev_dbg(&client->dev, "init failed=%d\n", ret);
	kfree(s);

	return ret;
	}

	static int sp2_remove(struct i2c_client *client)
	{
	struct sp2 *s = i2c_get_clientdata(client);

	dev_dbg(&client->dev, "\n");
	sp2_exit(client);
	kfree(s);
	return 0;
	}

	static const struct i2c_device_id sp2_id[] = {
	{"sp2", 0},
	{}
	};
	MODULE_DEVICE_TABLE(i2c, sp2_id);

	static struct i2c_driver sp2_driver = {
	.driver = {
	.name = "sp2",
	},
	.probe = sp2_probe,
	.remove = sp2_remove,
	.id_table = sp2_id,
	};

	module_i2c_driver(sp2_driver);

	MODULE_DESCRIPTION("CIMaX SP2/HF CI driver");
	MODULE_AUTHOR("Olli Salonen <olli.salonen@iki.fi>");
	MODULE_LICENSE("GPL");