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>

10 files changed, 169 insertions, 127 deletions

diff --git a/drivers/media/dvb/frontends/Kconfig b/drivers/media/dvb/frontends/Kconfig
index 6d90ff3f71ec..64cd63623b0b 100644
--- a/drivers/media/dvb/frontends/Kconfig
+++ b/drivers/media/dvb/frontends/Kconfig
@@ -216,4 +216,14 @@ config DVB_LGDT330X
 	  An ATSC 8VSB and QAM64/256 tuner module. Say Y when you want
 	  to support this frontend.
 
+
+comment "Miscellaneous devices"
+	depends on DVB_CORE
+
+config DVB_LNBP21
+	tristate "LNBP21 SEC controller"
+	depends on DVB_CORE
+	help
+	  An SEC control chip.
+
 endmenu
diff --git a/drivers/media/dvb/frontends/Makefile b/drivers/media/dvb/frontends/Makefile
index d09b6071fbaf..7238e6ef2f22 100644
--- a/drivers/media/dvb/frontends/Makefile
+++ b/drivers/media/dvb/frontends/Makefile
@@ -31,3 +31,4 @@ obj-$(CONFIG_DVB_BCM3510) += bcm3510.o
 obj-$(CONFIG_DVB_S5H1420) += s5h1420.o
 obj-$(CONFIG_DVB_LGDT330X) += lgdt330x.o
 obj-$(CONFIG_DVB_CX24123) += cx24123.o
+obj-$(CONFIG_DVB_LNBP21) += lnbp21.o
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");
diff --git a/drivers/media/dvb/frontends/lnbp21.h b/drivers/media/dvb/frontends/lnbp21.h
index 0dcbe61b61b1..047a4ab68c01 100644
--- a/drivers/media/dvb/frontends/lnbp21.h
+++ b/drivers/media/dvb/frontends/lnbp21.h
@@ -27,7 +27,7 @@
 #ifndef _LNBP21_H
 #define _LNBP21_H
 
-/* system register */
+/* system register bits */
 #define LNBP21_OLF	0x01
 #define LNBP21_OTF	0x02
 #define LNBP21_EN	0x04
@@ -37,103 +37,9 @@
 #define LNBP21_ISEL	0x40
 #define LNBP21_PCL	0x80
 
-struct lnbp21 {
-	u8			config;
-	u8			override_or;
-	u8			override_and;
-	struct i2c_adapter	*i2c;
-	void			(*release_chain)(struct dvb_frontend* fe);
-};
+#include <linux/dvb/frontend.h>
 
-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_exit(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);
-}
-
-static int lnbp21_init(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;
-
-	/* bits which should be forced to '1' */
-	lnbp21->override_or = override_set;
-
-	/* bits which should be forced to '0' */
-	lnbp21->override_and = ~override_clear;
-
-	/* install release callback */
-	lnbp21->release_chain = fe->ops->release;
-	fe->ops->release = lnbp21_exit;
-
-	/* override frontend ops */
-	fe->ops->set_voltage = lnbp21_set_voltage;
-	fe->ops->enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage;
-
-	lnbp21->i2c = i2c;
-	fe->misc_priv = lnbp21;
-
-	return lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF);
-}
+/* override_set and override_clear control which system register bits (above) to always set & clear */
+extern int lnbp21_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear);
 
 #endif
diff --git a/drivers/media/dvb/ttpci/Kconfig b/drivers/media/dvb/ttpci/Kconfig
index b5ac7dfde52f..987881fa988c 100644
--- a/drivers/media/dvb/ttpci/Kconfig
+++ b/drivers/media/dvb/ttpci/Kconfig
@@ -10,6 +10,7 @@ config DVB_AV7110
 	select DVB_SP8870
 	select DVB_STV0297
 	select DVB_L64781
+	select DVB_LNBP21
 	help
 	  Support for SAA7146 and AV7110 based DVB cards as produced
 	  by Fujitsu-Siemens, Technotrend, Hauppauge and others.
@@ -67,6 +68,7 @@ config DVB_BUDGET
 	select DVB_TDA8083
 	select DVB_TDA10021
 	select DVB_S5H1420
+	select DVB_LNBP21
 	help
 	  Support for simple SAA7146 based DVB cards
 	  (so called Budget- or Nova-PCI cards) without onboard
@@ -84,6 +86,7 @@ config DVB_BUDGET_CI
 	select DVB_STV0297
 	select DVB_STV0299
 	select DVB_TDA1004X
+	select DVB_LNBP21
 	help
 	  Support for simple SAA7146 based DVB cards
 	  (so called Budget- or Nova-PCI cards) without onboard
diff --git a/drivers/media/dvb/ttpci/av7110.c b/drivers/media/dvb/ttpci/av7110.c
index 5f976d5eda42..1a6d7a3bf459 100644
--- a/drivers/media/dvb/ttpci/av7110.c
+++ b/drivers/media/dvb/ttpci/av7110.c
@@ -2223,7 +2223,7 @@ static int frontend_init(struct av7110 *av7110)
 				av7110->fe->ops->tuner_ops.set_params = alps_bsbe1_tuner_set_params;
 				av7110->fe->tuner_priv = &av7110->i2c_adap;
 
-				if (lnbp21_init(av7110->fe, &av7110->i2c_adap, 0, 0)) {
+				if (lnbp21_attach(av7110->fe, &av7110->i2c_adap, 0, 0)) {
 					printk("dvb-ttpci: LNBP21 not found!\n");
 					if (av7110->fe->ops->release)
 						av7110->fe->ops->release(av7110->fe);
diff --git a/drivers/media/dvb/ttpci/budget-ci.c b/drivers/media/dvb/ttpci/budget-ci.c
index ed610e56b91e..145e12f9a7f6 100644
--- a/drivers/media/dvb/ttpci/budget-ci.c
+++ b/drivers/media/dvb/ttpci/budget-ci.c
@@ -1043,7 +1043,7 @@ static void frontend_init(struct budget_ci *budget_ci)
 			budget_ci->budget.dvb_frontend->tuner_priv = &budget_ci->budget.i2c_adap;
 
 			budget_ci->budget.dvb_frontend->ops->dishnetwork_send_legacy_command = NULL;
-			if (lnbp21_init(budget_ci->budget.dvb_frontend, &budget_ci->budget.i2c_adap, LNBP21_LLC, 0)) {
+			if (lnbp21_attach(budget_ci->budget.dvb_frontend, &budget_ci->budget.i2c_adap, LNBP21_LLC, 0)) {
 				printk("%s: No LNBP21 found!\n", __FUNCTION__);
 				if (budget_ci->budget.dvb_frontend->ops->release)
 					budget_ci->budget.dvb_frontend->ops->release(budget_ci->budget.dvb_frontend);
diff --git a/drivers/media/dvb/ttpci/budget.c b/drivers/media/dvb/ttpci/budget.c
index a231975cbe3c..d98395fefc95 100644
--- a/drivers/media/dvb/ttpci/budget.c
+++ b/drivers/media/dvb/ttpci/budget.c
@@ -423,7 +423,7 @@ static void frontend_init(struct budget *budget)
 		budget->dvb_frontend = s5h1420_attach(&s5h1420_config, &budget->i2c_adap);
 		if (budget->dvb_frontend) {
 			budget->dvb_frontend->ops->tuner_ops.set_params = s5h1420_tuner_set_params;
-			if (lnbp21_init(budget->dvb_frontend, &budget->i2c_adap, 0, 0)) {
+			if (lnbp21_attach(budget->dvb_frontend, &budget->i2c_adap, 0, 0)) {
 				printk("%s: No LNBP21 found!\n", __FUNCTION__);
 				goto error_out;
 			}
diff --git a/drivers/media/dvb/ttusb-budget/Kconfig b/drivers/media/dvb/ttusb-budget/Kconfig
index 914587d52b57..d1004e863290 100644
--- a/drivers/media/dvb/ttusb-budget/Kconfig
+++ b/drivers/media/dvb/ttusb-budget/Kconfig
@@ -6,6 +6,7 @@ config DVB_TTUSB_BUDGET
 	select DVB_VES1820
 	select DVB_TDA8083
 	select DVB_STV0299
+	select DVB_LNBP21
 	help
 	  Support for external USB adapters designed by Technotrend and
 	  produced by Hauppauge, shipped under the brand name 'Nova-USB'.
diff --git a/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c b/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c
index cd19ba628101..71581303b0ea 100644
--- a/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c
+++ b/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c
@@ -30,6 +30,7 @@
 #include "tda1004x.h"
 #include "stv0299.h"
 #include "tda8083.h"
+#include "lnbp21.h"
 
 #include <linux/dvb/frontend.h>
 #include <linux/dvb/dmx.h>
@@ -486,31 +487,6 @@ static int ttusb_send_diseqc(struct dvb_frontend* fe,
 }
 #endif
 
-static int lnbp21_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
-{
-	struct  ttusb* ttusb = (struct ttusb*)  fe->dvb->priv;
-	int ret;
-	u8 data[1];
-	struct i2c_msg msg = { .addr = 0x08, .flags = 0, .buf = data, .len = sizeof(data) };
-
-	switch(voltage) {
-	case SEC_VOLTAGE_OFF:
-		data[0] = 0x00;
-		break;
-	case SEC_VOLTAGE_13:
-		data[0] = 0x44;
-		break;
-	case SEC_VOLTAGE_18:
-		data[0] = 0x4c;
-		break;
-	default:
-		return -EINVAL;
-	};
-
-	ret = i2c_transfer(&ttusb->i2c_adap, &msg, 1);
-	return (ret != 1) ? -EIO : 0;
-}
-
 static int ttusb_update_lnb(struct ttusb *ttusb)
 {
 	u8 b[] = { 0xaa, ++ttusb->c, 0x16, 5, /*power: */ 1,
@@ -1415,7 +1391,7 @@ static void frontend_init(struct ttusb* ttusb)
 
 			if(ttusb->revision == TTUSB_REV_2_2) { // ALPS BSBE1
 				alps_stv0299_config.inittab = alps_bsbe1_inittab;
-				ttusb->fe->ops->set_voltage = lnbp21_set_voltage;
+				lnbp21_attach(ttusb->fe, &ttusb->i2c_adap, 0, 0);
 			} else { // ALPS BSRU6
 				ttusb->fe->ops->set_voltage = ttusb_set_voltage;
 			}