Initial import

1 files changed, 167 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/isl6421.c b/drivers/media/dvb-frontends/isl6421.c
new file mode 100644
index 000000000..c77002fcc
--- /dev/null
+++ b/drivers/media/dvb-frontends/isl6421.c
@@ -0,0 +1,167 @@
+/*
+ * isl6421.h - driver for lnb supply and control ic ISL6421
+ *
+ * Copyright (C) 2006 Andrew de Quincey
+ * Copyright (C) 2006 Oliver Endriss
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
+ *
+ *
+ * the project's page is at http://www.linuxtv.org
+ */
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+
+#include "dvb_frontend.h"
+#include "isl6421.h"
+
+struct isl6421 {
+	u8			config;
+	u8			override_or;
+	u8			override_and;
+	struct i2c_adapter	*i2c;
+	u8			i2c_addr;
+};
+
+static int isl6421_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
+{
+	struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
+	struct i2c_msg msg = {	.addr = isl6421->i2c_addr, .flags = 0,
+				.buf = &isl6421->config,
+				.len = sizeof(isl6421->config) };
+
+	isl6421->config &= ~(ISL6421_VSEL1 | ISL6421_EN1);
+
+	switch(voltage) {
+	case SEC_VOLTAGE_OFF:
+		break;
+	case SEC_VOLTAGE_13:
+		isl6421->config |= ISL6421_EN1;
+		break;
+	case SEC_VOLTAGE_18:
+		isl6421->config |= (ISL6421_EN1 | ISL6421_VSEL1);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	isl6421->config |= isl6421->override_or;
+	isl6421->config &= isl6421->override_and;
+
+	return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
+}
+
+static int isl6421_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
+{
+	struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
+	struct i2c_msg msg = {	.addr = isl6421->i2c_addr, .flags = 0,
+				.buf = &isl6421->config,
+				.len = sizeof(isl6421->config) };
+
+	if (arg)
+		isl6421->config |= ISL6421_LLC1;
+	else
+		isl6421->config &= ~ISL6421_LLC1;
+
+	isl6421->config |= isl6421->override_or;
+	isl6421->config &= isl6421->override_and;
+
+	return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
+}
+
+static int isl6421_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
+{
+	struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
+	struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
+			       .buf = &isl6421->config,
+			       .len = sizeof(isl6421->config) };
+
+	switch (tone) {
+	case SEC_TONE_ON:
+		isl6421->config |= ISL6421_ENT1;
+		break;
+	case SEC_TONE_OFF:
+		isl6421->config &= ~ISL6421_ENT1;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	isl6421->config |= isl6421->override_or;
+	isl6421->config &= isl6421->override_and;
+
+	return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
+}
+
+static void isl6421_release(struct dvb_frontend *fe)
+{
+	/* power off */
+	isl6421_set_voltage(fe, SEC_VOLTAGE_OFF);
+
+	/* free */
+	kfree(fe->sec_priv);
+	fe->sec_priv = NULL;
+}
+
+struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
+		   u8 override_set, u8 override_clear, bool override_tone)
+{
+	struct isl6421 *isl6421 = kmalloc(sizeof(struct isl6421), GFP_KERNEL);
+	if (!isl6421)
+		return NULL;
+
+	/* default configuration */
+	isl6421->config = ISL6421_ISEL1;
+	isl6421->i2c = i2c;
+	isl6421->i2c_addr = i2c_addr;
+	fe->sec_priv = isl6421;
+
+	/* bits which should be forced to '1' */
+	isl6421->override_or = override_set;
+
+	/* bits which should be forced to '0' */
+	isl6421->override_and = ~override_clear;
+
+	/* detect if it is present or not */
+	if (isl6421_set_voltage(fe, SEC_VOLTAGE_OFF)) {
+		kfree(isl6421);
+		fe->sec_priv = NULL;
+		return NULL;
+	}
+
+	/* install release callback */
+	fe->ops.release_sec = isl6421_release;
+
+	/* override frontend ops */
+	fe->ops.set_voltage = isl6421_set_voltage;
+	fe->ops.enable_high_lnb_voltage = isl6421_enable_high_lnb_voltage;
+	if (override_tone)
+		fe->ops.set_tone = isl6421_set_tone;
+
+	return fe;
+}
+EXPORT_SYMBOL(isl6421_attach);
+
+MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6421");
+MODULE_AUTHOR("Andrew de Quincey & Oliver Endriss");
+MODULE_LICENSE("GPL");