Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / media / dvb-frontends / isl6405.c

diff --git a/kernel/drivers/media/dvb-frontends/isl6405.c b/kernel/drivers/media/dvb-frontends/isl6405.c
new file mode 100644 (file)
index 0000000..0c642a5
--- /dev/null
+++ b/kernel/drivers/media/dvb-frontends/isl6405.c
@@ -0,0 +1,164 @@
+/*
+ * isl6405.c - driver for dual lnb supply and control ic ISL6405
+ *
+ * Copyright (C) 2008 Hartmut Hackmann
+ * 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 "isl6405.h"
+
+struct isl6405 {
+       u8                      config;
+       u8                      override_or;
+       u8                      override_and;
+       struct i2c_adapter      *i2c;
+       u8                      i2c_addr;
+};
+
+static int isl6405_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
+{
+       struct isl6405 *isl6405 = (struct isl6405 *) fe->sec_priv;
+       struct i2c_msg msg = {  .addr = isl6405->i2c_addr, .flags = 0,
+                               .buf = &isl6405->config,
+                               .len = sizeof(isl6405->config) };
+
+       if (isl6405->override_or & 0x80) {
+               isl6405->config &= ~(ISL6405_VSEL2 | ISL6405_EN2);
+               switch (voltage) {
+               case SEC_VOLTAGE_OFF:
+                       break;
+               case SEC_VOLTAGE_13:
+                       isl6405->config |= ISL6405_EN2;
+                       break;
+               case SEC_VOLTAGE_18:
+                       isl6405->config |= (ISL6405_EN2 | ISL6405_VSEL2);
+                       break;
+               default:
+                       return -EINVAL;
+               }
+       } else {
+               isl6405->config &= ~(ISL6405_VSEL1 | ISL6405_EN1);
+               switch (voltage) {
+               case SEC_VOLTAGE_OFF:
+                       break;
+               case SEC_VOLTAGE_13:
+                       isl6405->config |= ISL6405_EN1;
+                       break;
+               case SEC_VOLTAGE_18:
+                       isl6405->config |= (ISL6405_EN1 | ISL6405_VSEL1);
+                       break;
+               default:
+                       return -EINVAL;
+               }
+       }
+       isl6405->config |= isl6405->override_or;
+       isl6405->config &= isl6405->override_and;
+
+       return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
+}
+
+static int isl6405_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
+{
+       struct isl6405 *isl6405 = (struct isl6405 *) fe->sec_priv;
+       struct i2c_msg msg = {  .addr = isl6405->i2c_addr, .flags = 0,
+                               .buf = &isl6405->config,
+                               .len = sizeof(isl6405->config) };
+
+       if (isl6405->override_or & 0x80) {
+               if (arg)
+                       isl6405->config |= ISL6405_LLC2;
+               else
+                       isl6405->config &= ~ISL6405_LLC2;
+       } else {
+               if (arg)
+                       isl6405->config |= ISL6405_LLC1;
+               else
+                       isl6405->config &= ~ISL6405_LLC1;
+       }
+       isl6405->config |= isl6405->override_or;
+       isl6405->config &= isl6405->override_and;
+
+       return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
+}
+
+static void isl6405_release(struct dvb_frontend *fe)
+{
+       /* power off */
+       isl6405_set_voltage(fe, SEC_VOLTAGE_OFF);
+
+       /* free */
+       kfree(fe->sec_priv);
+       fe->sec_priv = NULL;
+}
+
+struct dvb_frontend *isl6405_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c,
+                                   u8 i2c_addr, u8 override_set, u8 override_clear)
+{
+       struct isl6405 *isl6405 = kmalloc(sizeof(struct isl6405), GFP_KERNEL);
+       if (!isl6405)
+               return NULL;
+
+       /* default configuration */
+       if (override_set & 0x80)
+               isl6405->config = ISL6405_ISEL2;
+       else
+               isl6405->config = ISL6405_ISEL1;
+       isl6405->i2c = i2c;
+       isl6405->i2c_addr = i2c_addr;
+       fe->sec_priv = isl6405;
+
+       /* bits which should be forced to '1' */
+       isl6405->override_or = override_set;
+
+       /* bits which should be forced to '0' */
+       isl6405->override_and = ~override_clear;
+
+       /* detect if it is present or not */
+       if (isl6405_set_voltage(fe, SEC_VOLTAGE_OFF)) {
+               kfree(isl6405);
+               fe->sec_priv = NULL;
+               return NULL;
+       }
+
+       /* install release callback */
+       fe->ops.release_sec = isl6405_release;
+
+       /* override frontend ops */
+       fe->ops.set_voltage = isl6405_set_voltage;
+       fe->ops.enable_high_lnb_voltage = isl6405_enable_high_lnb_voltage;
+
+       return fe;
+}
+EXPORT_SYMBOL(isl6405_attach);
+
+MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6405");
+MODULE_AUTHOR("Hartmut Hackmann & Oliver Endriss");
+MODULE_LICENSE("GPL");