Initial import

1 files changed, 308 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/isl6423.c b/drivers/media/dvb-frontends/isl6423.c
new file mode 100644
index 000000000..dca5bebfe
--- /dev/null
+++ b/drivers/media/dvb-frontends/isl6423.c
@@ -0,0 +1,308 @@
+/*
+	Intersil ISL6423 SEC and LNB Power supply controller
+
+	Copyright (C) Manu Abraham <abraham.manu@gmail.com>
+
+	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 <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 "isl6423.h"
+
+static unsigned int verbose;
+module_param(verbose, int, 0644);
+MODULE_PARM_DESC(verbose, "Set Verbosity level");
+
+#define FE_ERROR				0
+#define FE_NOTICE				1
+#define FE_INFO					2
+#define FE_DEBUG				3
+#define FE_DEBUGREG				4
+
+#define dprintk(__y, __z, format, arg...) do {						\
+	if (__z) {									\
+		if	((verbose > FE_ERROR) && (verbose > __y))			\
+			printk(KERN_ERR "%s: " format "\n", __func__ , ##arg);		\
+		else if	((verbose > FE_NOTICE) && (verbose > __y))			\
+			printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg);	\
+		else if ((verbose > FE_INFO) && (verbose > __y))			\
+			printk(KERN_INFO "%s: " format "\n", __func__ , ##arg);		\
+		else if ((verbose > FE_DEBUG) && (verbose > __y))			\
+			printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg);	\
+	} else {									\
+		if (verbose > __y)							\
+			printk(format, ##arg);						\
+	}										\
+} while (0)
+
+struct isl6423_dev {
+	const struct isl6423_config	*config;
+	struct i2c_adapter		*i2c;
+
+	u8 reg_3;
+	u8 reg_4;
+
+	unsigned int verbose;
+};
+
+static int isl6423_write(struct isl6423_dev *isl6423, u8 reg)
+{
+	struct i2c_adapter *i2c = isl6423->i2c;
+	u8 addr			= isl6423->config->addr;
+	int err = 0;
+
+	struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = &reg, .len = 1 };
+
+	dprintk(FE_DEBUG, 1, "write reg %02X", reg);
+	err = i2c_transfer(i2c, &msg, 1);
+	if (err < 0)
+		goto exit;
+	return 0;
+
+exit:
+	dprintk(FE_ERROR, 1, "I/O error <%d>", err);
+	return err;
+}
+
+static int isl6423_set_modulation(struct dvb_frontend *fe)
+{
+	struct isl6423_dev *isl6423		= (struct isl6423_dev *) fe->sec_priv;
+	const struct isl6423_config *config	= isl6423->config;
+	int err = 0;
+	u8 reg_2 = 0;
+
+	reg_2 = 0x01 << 5;
+
+	if (config->mod_extern)
+		reg_2 |= (1 << 3);
+	else
+		reg_2 |= (1 << 4);
+
+	err = isl6423_write(isl6423, reg_2);
+	if (err < 0)
+		goto exit;
+	return 0;
+
+exit:
+	dprintk(FE_ERROR, 1, "I/O error <%d>", err);
+	return err;
+}
+
+static int isl6423_voltage_boost(struct dvb_frontend *fe, long arg)
+{
+	struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
+	u8 reg_3 = isl6423->reg_3;
+	u8 reg_4 = isl6423->reg_4;
+	int err = 0;
+
+	if (arg) {
+		/* EN = 1, VSPEN = 1, VBOT = 1 */
+		reg_4 |= (1 << 4);
+		reg_4 |= 0x1;
+		reg_3 |= (1 << 3);
+	} else {
+		/* EN = 1, VSPEN = 1, VBOT = 0 */
+		reg_4 |= (1 << 4);
+		reg_4 &= ~0x1;
+		reg_3 |= (1 << 3);
+	}
+	err = isl6423_write(isl6423, reg_3);
+	if (err < 0)
+		goto exit;
+
+	err = isl6423_write(isl6423, reg_4);
+	if (err < 0)
+		goto exit;
+
+	isl6423->reg_3 = reg_3;
+	isl6423->reg_4 = reg_4;
+
+	return 0;
+exit:
+	dprintk(FE_ERROR, 1, "I/O error <%d>", err);
+	return err;
+}
+
+
+static int isl6423_set_voltage(struct dvb_frontend *fe,
+			       enum fe_sec_voltage voltage)
+{
+	struct isl6423_dev *isl6423 = (struct isl6423_dev *) fe->sec_priv;
+	u8 reg_3 = isl6423->reg_3;
+	u8 reg_4 = isl6423->reg_4;
+	int err = 0;
+
+	switch (voltage) {
+	case SEC_VOLTAGE_OFF:
+		/* EN = 0 */
+		reg_4 &= ~(1 << 4);
+		break;
+
+	case SEC_VOLTAGE_13:
+		/* EN = 1, VSPEN = 1, VTOP = 0, VBOT = 0 */
+		reg_4 |= (1 << 4);
+		reg_4 &= ~0x3;
+		reg_3 |= (1 << 3);
+		break;
+
+	case SEC_VOLTAGE_18:
+		/* EN = 1, VSPEN = 1, VTOP = 1, VBOT = 0 */
+		reg_4 |= (1 << 4);
+		reg_4 |=  0x2;
+		reg_4 &= ~0x1;
+		reg_3 |= (1 << 3);
+		break;
+
+	default:
+		break;
+	}
+	err = isl6423_write(isl6423, reg_3);
+	if (err < 0)
+		goto exit;
+
+	err = isl6423_write(isl6423, reg_4);
+	if (err < 0)
+		goto exit;
+
+	isl6423->reg_3 = reg_3;
+	isl6423->reg_4 = reg_4;
+
+	return 0;
+exit:
+	dprintk(FE_ERROR, 1, "I/O error <%d>", err);
+	return err;
+}
+
+static int isl6423_set_current(struct dvb_frontend *fe)
+{
+	struct isl6423_dev *isl6423		= (struct isl6423_dev *) fe->sec_priv;
+	u8 reg_3 = isl6423->reg_3;
+	const struct isl6423_config *config	= isl6423->config;
+	int err = 0;
+
+	switch (config->current_max) {
+	case SEC_CURRENT_275m:
+		/* 275mA */
+		/* ISELH = 0, ISELL = 0 */
+		reg_3 &= ~0x3;
+		break;
+
+	case SEC_CURRENT_515m:
+		/* 515mA */
+		/* ISELH = 0, ISELL = 1 */
+		reg_3 &= ~0x2;
+		reg_3 |=  0x1;
+		break;
+
+	case SEC_CURRENT_635m:
+		/* 635mA */
+		/* ISELH = 1, ISELL = 0 */
+		reg_3 &= ~0x1;
+		reg_3 |=  0x2;
+		break;
+
+	case SEC_CURRENT_800m:
+		/* 800mA */
+		/* ISELH = 1, ISELL = 1 */
+		reg_3 |= 0x3;
+		break;
+	}
+
+	err = isl6423_write(isl6423, reg_3);
+	if (err < 0)
+		goto exit;
+
+	switch (config->curlim) {
+	case SEC_CURRENT_LIM_ON:
+		/* DCL = 0 */
+		reg_3 &= ~0x10;
+		break;
+
+	case SEC_CURRENT_LIM_OFF:
+		/* DCL = 1 */
+		reg_3 |= 0x10;
+		break;
+	}
+
+	err = isl6423_write(isl6423, reg_3);
+	if (err < 0)
+		goto exit;
+
+	isl6423->reg_3 = reg_3;
+
+	return 0;
+exit:
+	dprintk(FE_ERROR, 1, "I/O error <%d>", err);
+	return err;
+}
+
+static void isl6423_release(struct dvb_frontend *fe)
+{
+	isl6423_set_voltage(fe, SEC_VOLTAGE_OFF);
+
+	kfree(fe->sec_priv);
+	fe->sec_priv = NULL;
+}
+
+struct dvb_frontend *isl6423_attach(struct dvb_frontend *fe,
+				    struct i2c_adapter *i2c,
+				    const struct isl6423_config *config)
+{
+	struct isl6423_dev *isl6423;
+
+	isl6423 = kzalloc(sizeof(struct isl6423_dev), GFP_KERNEL);
+	if (!isl6423)
+		return NULL;
+
+	isl6423->config	= config;
+	isl6423->i2c	= i2c;
+	fe->sec_priv	= isl6423;
+
+	/* SR3H = 0, SR3M = 1, SR3L = 0 */
+	isl6423->reg_3 = 0x02 << 5;
+	/* SR4H = 0, SR4M = 1, SR4L = 1 */
+	isl6423->reg_4 = 0x03 << 5;
+
+	if (isl6423_set_current(fe))
+		goto exit;
+
+	if (isl6423_set_modulation(fe))
+		goto exit;
+
+	fe->ops.release_sec		= isl6423_release;
+	fe->ops.set_voltage		= isl6423_set_voltage;
+	fe->ops.enable_high_lnb_voltage = isl6423_voltage_boost;
+	isl6423->verbose		= verbose;
+
+	return fe;
+
+exit:
+	kfree(isl6423);
+	fe->sec_priv = NULL;
+	return NULL;
+}
+EXPORT_SYMBOL(isl6423_attach);
+
+MODULE_DESCRIPTION("ISL6423 SEC");
+MODULE_AUTHOR("Manu Abraham");
+MODULE_LICENSE("GPL");