V4L/DVB (10797): Add EEPROM code for NetUP Dual DVB-S2 CI card.

Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Igor M. Liplianin <liplianin@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx23885/netup-eeprom.c

+
+/*
+ * netup-eeprom.c
+ *
+ * 24LC02 EEPROM driver in conjunction with NetUP Dual DVB-S2 CI card
+ *
+ * Copyright (C) 2009 NetUP Inc.
+ * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#
+#include "cx23885.h"
+#include "netup-eeprom.h"
+
+#define EEPROM_I2C_ADDR 0x50
+
+int netup_eeprom_read(struct i2c_adapter *i2c_adap, u8 addr)
+{
+	int ret;
+	unsigned char buf[2];
+
+	/* Read from EEPROM */
+	struct i2c_msg msg[] = {
+		{
+			.addr	= EEPROM_I2C_ADDR,
+			.flags	= 0,
+			.buf	= &buf[0],
+			.len	= 1
+		}, {
+			.addr	= EEPROM_I2C_ADDR,
+			.flags	= I2C_M_RD,
+			.buf	= &buf[1],
+			.len	= 1
+		}
+
+	};
+
+	buf[0] = addr;
+	buf[1] = 0x0;
+
+	ret = i2c_transfer(i2c_adap, msg, 2);
+
+	if (ret != 2) {
+		printk(KERN_ERR "eeprom i2c read error, status=%d\n", ret);
+		return -1;
+	}
+
+	return buf[1];
+};
+
+int netup_eeprom_write(struct i2c_adapter *i2c_adap, u8 addr, u8 data)
+{
+	int ret;
+	unsigned char bufw[2];
+
+	/* Write into EEPROM */
+	struct i2c_msg msg[] = {
+		{
+			.addr	= EEPROM_I2C_ADDR,
+			.flags	= 0,
+			.buf	= &bufw[0],
+			.len	= 2
+		}
+	};
+
+	bufw[0] = addr;
+	bufw[1] = data;
+
+	ret = i2c_transfer(i2c_adap, msg, 1);
+
+	if (ret != 1) {
+		printk(KERN_ERR "eeprom i2c write error, status=%d\n", ret);
+		return -1;
+	}
+
+	mdelay(10); /* prophylactic delay, datasheet write cycle time = 5 ms */
+	return 0;
+};
+
+void netup_get_card_info(struct i2c_adapter *i2c_adap,
+				struct netup_card_info *cinfo)
+{
+	int i, j;
+
+	cinfo->rev =  netup_eeprom_read(i2c_adap, 13);
+
+	for (i = 0, j = 0; i < 6; i++, j++)
+		cinfo->port[0].mac[j] =  netup_eeprom_read(i2c_adap, i);
+
+	for (i = 6, j = 0; i < 12; i++, j++)
+		cinfo->port[1].mac[j] =  netup_eeprom_read(i2c_adap, i);
+};

drivers/media/video/cx23885/netup-eeprom.h

+/*
+ * netup-eeprom.h
+ *
+ * 24LC02 EEPROM driver in conjunction with NetUP Dual DVB-S2 CI card
+ *
+ * Copyright (C) 2009 NetUP Inc.
+ * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef NETUP_EEPROM_H
+#define NETUP_EEPROM_H
+
+struct netup_port_info {
+	u8 mac[6];/* card MAC address */
+};
+
+struct netup_card_info {
+	struct netup_port_info port[2];/* ports - 1,2 */
+	u8 rev;/* card revision */
+};
+
+extern int netup_eeprom_read(struct i2c_adapter *i2c_adap, u8 addr);
+extern int netup_eeprom_write(struct i2c_adapter *i2c_adap, u8 addr, u8 data);
+extern void netup_get_card_info(struct i2c_adapter *i2c_adap,
+				struct netup_card_info *cinfo);
+
+#endif