1 files changed, 148 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/lnbp22.c b/drivers/media/dvb-frontends/lnbp22.c
new file mode 100644
index 000000000000..84ad0390a4a1
--- /dev/null
+++ b/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");