This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / drivers / media / dvb / frontends / isl6421.c

diff --git a/drivers/media/dvb/frontends/isl6421.c b/drivers/media/dvb/frontends/isl6421.c
new file mode 100644 (file)
index 0000000..58c34db
--- /dev/null
+++ b/drivers/media/dvb/frontends/isl6421.c
@@ -0,0 +1,149 @@
+/*
+ * 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/moduleparam.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;
+       void                    (*release_chain)(struct dvb_frontend* fe);
+};
+
+static int isl6421_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
+{
+       struct isl6421 *isl6421 = (struct isl6421 *) fe->misc_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->misc_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 void isl6421_release(struct dvb_frontend *fe)
+{
+       struct isl6421 *isl6421 = (struct isl6421 *) fe->misc_priv;
+
+       /* power off */
+       isl6421_set_voltage(fe, SEC_VOLTAGE_OFF);
+
+       /* free data & call next release routine */
+       fe->ops.release = isl6421->release_chain;
+       kfree(fe->misc_priv);
+       fe->misc_priv = NULL;
+       if (fe->ops.release)
+               fe->ops.release(fe);
+}
+
+int isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
+                  u8 override_set, u8 override_clear)
+{
+       struct isl6421 *isl6421 = kmalloc(sizeof(struct isl6421), GFP_KERNEL);
+       if (!isl6421)
+               return -ENOMEM;
+
+       /* default configuration */
+       isl6421->config = ISL6421_ISEL1;
+       isl6421->i2c = i2c;
+       isl6421->i2c_addr = i2c_addr;
+       fe->misc_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->misc_priv = NULL;
+               return -EIO;
+       }
+
+       /* install release callback */
+       isl6421->release_chain = fe->ops.release;
+       fe->ops.release = isl6421_release;
+
+       /* override frontend ops */
+       fe->ops.set_voltage = isl6421_set_voltage;
+       fe->ops.enable_high_lnb_voltage = isl6421_enable_high_lnb_voltage;
+
+       return 0;
+}
+EXPORT_SYMBOL(isl6421_attach);
+
+MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6421");
+MODULE_AUTHOR("Andrew de Quincey & Oliver Endriss");
+MODULE_LICENSE("GPL");