V4L/DVB (3932): Convert lnbp21 to a module

Convert lnbp21.h into a linux kernel module.
Fix up previous users to use it.
Convert dvb-ttusb-budget to use it.

Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 145 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/lnbp21.c b/drivers/media/dvb/frontends/lnbp21.c
new file mode 100644
index 000000000000..c9152c1fbc3f
--- /dev/null
+++ b/drivers/media/dvb/frontends/lnbp21.c
@@ -0,0 +1,145 @@
+/*
+ * lnbp21.h - driver for lnb supply and control ic lnbp21
+ *
+ * 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/moduleparam.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+
+#include "dvb_frontend.h"
+#include "lnbp21.h"
+
+struct lnbp21 {
+	u8			config;
+	u8			override_or;
+	u8			override_and;
+	struct i2c_adapter	*i2c;
+	void			(*release_chain)(struct dvb_frontend* fe);
+};
+
+static int lnbp21_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
+{
+	struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->misc_priv;
+	struct i2c_msg msg = {	.addr = 0x08, .flags = 0,
+				.buf = &lnbp21->config,
+				.len = sizeof(lnbp21->config) };
+
+	lnbp21->config &= ~(LNBP21_VSEL | LNBP21_EN);
+
+	switch(voltage) {
+	case SEC_VOLTAGE_OFF:
+		break;
+	case SEC_VOLTAGE_13:
+		lnbp21->config |= LNBP21_EN;
+		break;
+	case SEC_VOLTAGE_18:
+		lnbp21->config |= (LNBP21_EN | LNBP21_VSEL);
+		break;
+	default:
+		return -EINVAL;
+	};
+
+	lnbp21->config |= lnbp21->override_or;
+	lnbp21->config &= lnbp21->override_and;
+
+	return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
+}
+
+static int lnbp21_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
+{
+	struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->misc_priv;
+	struct i2c_msg msg = {	.addr = 0x08, .flags = 0,
+				.buf = &lnbp21->config,
+				.len = sizeof(lnbp21->config) };
+
+	if (arg)
+		lnbp21->config |= LNBP21_LLC;
+	else
+		lnbp21->config &= ~LNBP21_LLC;
+
+	lnbp21->config |= lnbp21->override_or;
+	lnbp21->config &= lnbp21->override_and;
+
+	return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
+}
+
+static void lnbp21_release(struct dvb_frontend *fe)
+{
+	struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->misc_priv;
+
+	/* LNBP power off */
+	lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF);
+
+	/* free data & call next release routine */
+	fe->ops->release = lnbp21->release_chain;
+	kfree(fe->misc_priv);
+	fe->misc_priv = NULL;
+	if (fe->ops->release)
+		fe->ops->release(fe);
+}
+
+int lnbp21_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear)
+{
+	struct lnbp21 *lnbp21 = kmalloc(sizeof(struct lnbp21), GFP_KERNEL);
+	if (!lnbp21)
+		return -ENOMEM;
+
+	/* default configuration */
+	lnbp21->config = LNBP21_ISEL;
+	lnbp21->i2c = i2c;
+	fe->misc_priv = lnbp21;
+
+	/* bits which should be forced to '1' */
+	lnbp21->override_or = override_set;
+
+	/* bits which should be forced to '0' */
+	lnbp21->override_and = ~override_clear;
+
+	/* detect if it is present or not */
+	if (lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF)) {
+		kfree(lnbp21);
+		fe->misc_priv = NULL;
+		return -EIO;
+	}
+
+	/* install release callback */
+	lnbp21->release_chain = fe->ops->release;
+	fe->ops->release = lnbp21_release;
+
+	/* override frontend ops */
+	fe->ops->set_voltage = lnbp21_set_voltage;
+	fe->ops->enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage;
+
+	return 0;
+}
+EXPORT_SYMBOL(lnbp21_attach);
+
+MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp21");
+MODULE_AUTHOR("Oliver Endriss");
+MODULE_LICENSE("GPL");