Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / media / dvb-frontends / lnbp22.c

diff --git a/kernel/drivers/media/dvb-frontends/lnbp22.c b/kernel/drivers/media/dvb-frontends/lnbp22.c
new file mode 100644 (file)
index 0000000..c463da7
--- /dev/null
+++ b/kernel/drivers/media/dvb-frontends/lnbp22.c
@@ -0,0 +1,148 @@
+/*
+ * lnbp22.h - driver for lnb supply and control ic lnbp22
+ *
+ * Copyright (C) 2006 Dominik Kuhlen
+ * Based on lnbp21 driver
+ *
+ * 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 "lnbp22.h"
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
+
+
+#define dprintk(lvl, arg...) if (debug >= (lvl)) printk(arg)
+
+struct lnbp22 {
+       u8                  config[4];
+       struct i2c_adapter *i2c;
+};
+
+static int lnbp22_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
+{
+       struct lnbp22 *lnbp22 = (struct lnbp22 *)fe->sec_priv;
+       struct i2c_msg msg = {
+               .addr = 0x08,
+               .flags = 0,
+               .buf = (char *)&lnbp22->config,
+               .len = sizeof(lnbp22->config),
+       };
+
+       dprintk(1, "%s: %d (18V=%d 13V=%d)\n", __func__, voltage,
+              SEC_VOLTAGE_18, SEC_VOLTAGE_13);
+
+       lnbp22->config[3] = 0x60; /* Power down */
+       switch (voltage) {
+       case SEC_VOLTAGE_OFF:
+               break;
+       case SEC_VOLTAGE_13:
+               lnbp22->config[3] |= LNBP22_EN;
+               break;
+       case SEC_VOLTAGE_18:
+               lnbp22->config[3] |= (LNBP22_EN | LNBP22_VSEL);
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       dprintk(1, "%s: 0x%02x)\n", __func__, lnbp22->config[3]);
+       return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
+}
+
+static int lnbp22_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
+{
+       struct lnbp22 *lnbp22 = (struct lnbp22 *) fe->sec_priv;
+       struct i2c_msg msg = {
+               .addr = 0x08,
+               .flags = 0,
+               .buf = (char *)&lnbp22->config,
+               .len = sizeof(lnbp22->config),
+       };
+
+       dprintk(1, "%s: %d\n", __func__, (int)arg);
+       if (arg)
+               lnbp22->config[3] |= LNBP22_LLC;
+       else
+               lnbp22->config[3] &= ~LNBP22_LLC;
+
+       return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
+}
+
+static void lnbp22_release(struct dvb_frontend *fe)
+{
+       dprintk(1, "%s\n", __func__);
+       /* LNBP power off */
+       lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF);
+
+       /* free data */
+       kfree(fe->sec_priv);
+       fe->sec_priv = NULL;
+}
+
+struct dvb_frontend *lnbp22_attach(struct dvb_frontend *fe,
+                                       struct i2c_adapter *i2c)
+{
+       struct lnbp22 *lnbp22 = kmalloc(sizeof(struct lnbp22), GFP_KERNEL);
+       if (!lnbp22)
+               return NULL;
+
+       /* default configuration */
+       lnbp22->config[0] = 0x00; /* ? */
+       lnbp22->config[1] = 0x28; /* ? */
+       lnbp22->config[2] = 0x48; /* ? */
+       lnbp22->config[3] = 0x60; /* Power down */
+       lnbp22->i2c = i2c;
+       fe->sec_priv = lnbp22;
+
+       /* detect if it is present or not */
+       if (lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF)) {
+               dprintk(0, "%s LNBP22 not found\n", __func__);
+               kfree(lnbp22);
+               fe->sec_priv = NULL;
+               return NULL;
+       }
+
+       /* install release callback */
+       fe->ops.release_sec = lnbp22_release;
+
+       /* override frontend ops */
+       fe->ops.set_voltage = lnbp22_set_voltage;
+       fe->ops.enable_high_lnb_voltage = lnbp22_enable_high_lnb_voltage;
+
+       return fe;
+}
+EXPORT_SYMBOL(lnbp22_attach);
+
+MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp22");
+MODULE_AUTHOR("Dominik Kuhlen");
+MODULE_LICENSE("GPL");