[media] lnbh25: LNBH25 SEC controller driver
authorKozlov Sergey <serjk@netup.ru>
Tue, 28 Jul 2015 14:33:02 +0000 (11:33 -0300)
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>
Tue, 11 Aug 2015 17:59:05 +0000 (14:59 -0300)
Add DVB SEC frontend driver for STM LNBH25PQR chip.

[mchehab@osg.samsung.com: fix merge conflict:
 fe_sec_voltage_t should not be used in kernelspace anymore.
 instead, it should use enum fe_sec_voltage]
Signed-off-by: Kozlov Sergey <serjk@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
MAINTAINERS
drivers/media/dvb-frontends/Kconfig
drivers/media/dvb-frontends/Makefile
drivers/media/dvb-frontends/lnbh25.c [new file with mode: 0644]
drivers/media/dvb-frontends/lnbh25.h [new file with mode: 0644]

index 1735af359357078cad7b74620f4091ef6736cfd1..a8ef03c901050295aaa014f63ce02ffdb08bffe5 100644 (file)
@@ -6619,6 +6619,15 @@ T:       git git://linuxtv.org/media_tree.git
 S:     Supported
 F:     drivers/media/dvb-frontends/horus3a*
 
+MEDIA DRIVERS FOR LNBH25
+M:     Sergey Kozlov <serjk@netup.ru>
+L:     linux-media@vger.kernel.org
+W:     http://linuxtv.org/
+W:     http://netup.tv/
+T:     git git://linuxtv.org/media_tree.git
+S:     Supported
+F:     drivers/media/dvb-frontends/lnbh25*
+
 MEDIA INPUT INFRASTRUCTURE (V4L/DVB)
 M:     Mauro Carvalho Chehab <mchehab@osg.samsung.com>
 P:     LinuxTV.org Project
index ec628c482cdf0055da59bb1b8a3e751cbd3e6a13..82b21b92f33b4c6767aea7b44a5ff2f2fde92d16 100644 (file)
@@ -713,6 +713,14 @@ comment "SEC control devices for DVB-S"
 
 source "drivers/media/dvb-frontends/drx39xyj/Kconfig"
 
+config DVB_LNBH25
+       tristate "LNBH25 SEC controller"
+       depends on DVB_CORE && I2C
+       default m if !MEDIA_SUBDRV_AUTOSELECT
+       help
+         An SEC control chip.
+         Say Y when you want to support this chip.
+
 config DVB_LNBP21
        tristate "LNBP21/LNBH24 SEC controllers"
        depends on DVB_CORE && I2C
index 0a1bf69cb79a8ae943a0e1249f2d074f276b9a9d..07d962a29763d91380a0e50338ef5caf5f41657d 100644 (file)
@@ -57,6 +57,7 @@ obj-$(CONFIG_DVB_LGDT3305) += lgdt3305.o
 obj-$(CONFIG_DVB_LGDT3306A) += lgdt3306a.o
 obj-$(CONFIG_DVB_LG2160) += lg2160.o
 obj-$(CONFIG_DVB_CX24123) += cx24123.o
+obj-$(CONFIG_DVB_LNBH25) += lnbh25.o
 obj-$(CONFIG_DVB_LNBP21) += lnbp21.o
 obj-$(CONFIG_DVB_LNBP22) += lnbp22.o
 obj-$(CONFIG_DVB_ISL6405) += isl6405.o
diff --git a/drivers/media/dvb-frontends/lnbh25.c b/drivers/media/dvb-frontends/lnbh25.c
new file mode 100644 (file)
index 0000000..ef3021e
--- /dev/null
@@ -0,0 +1,189 @@
+/*
+ * lnbh25.c
+ *
+ * Driver for LNB supply and control IC LNBH25
+ *
+ * Copyright (C) 2014 NetUP Inc.
+ * Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
+ * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+
+#include "dvb_frontend.h"
+#include "lnbh25.h"
+
+/**
+ * struct lnbh25_priv - LNBH25 driver private data
+ * @i2c:               pointer to the I2C adapter structure
+ * @i2c_address:       I2C address of LNBH25 SEC chip
+ * @config:            Registers configuration:
+ *                     offset 0: 1st register address, always 0x02 (DATA1)
+ *                     offset 1: DATA1 register value
+ *                     offset 2: DATA2 register value
+ */
+struct lnbh25_priv {
+       struct i2c_adapter      *i2c;
+       u8                      i2c_address;
+       u8                      config[3];
+};
+
+#define LNBH25_STATUS_OFL      0x1
+#define LNBH25_STATUS_VMON     0x4
+#define LNBH25_VSEL_13         0x03
+#define LNBH25_VSEL_18         0x0a
+
+static int lnbh25_read_vmon(struct lnbh25_priv *priv)
+{
+       int i, ret;
+       u8 addr = 0x00;
+       u8 status[6];
+       struct i2c_msg msg[2] = {
+               {
+                       .addr = priv->i2c_address,
+                       .flags = 0,
+                       .len = 1,
+                       .buf = &addr
+               }, {
+                       .addr = priv->i2c_address,
+                       .flags = I2C_M_RD,
+                       .len = sizeof(status),
+                       .buf = status
+               }
+       };
+
+       for (i = 0; i < 2; i++) {
+               ret = i2c_transfer(priv->i2c, &msg[i], 1);
+               if (ret >= 0 && ret != 1)
+                       ret = -EIO;
+               if (ret < 0) {
+                       dev_dbg(&priv->i2c->dev,
+                               "%s(): I2C transfer %d failed (%d)\n",
+                               __func__, i, ret);
+                       return ret;
+               }
+       }
+       print_hex_dump_bytes("lnbh25_read_vmon: ",
+               DUMP_PREFIX_OFFSET, status, sizeof(status));
+       if ((status[0] & (LNBH25_STATUS_OFL | LNBH25_STATUS_VMON)) != 0) {
+               dev_err(&priv->i2c->dev,
+                       "%s(): voltage in failure state, status reg 0x%x\n",
+                       __func__, status[0]);
+               return -EIO;
+       }
+       return 0;
+}
+
+static int lnbh25_set_voltage(struct dvb_frontend *fe,
+                             enum fe_sec_voltage voltage)
+{
+       int ret;
+       u8 data1_reg;
+       const char *vsel;
+       struct lnbh25_priv *priv = fe->sec_priv;
+       struct i2c_msg msg = {
+               .addr = priv->i2c_address,
+               .flags = 0,
+               .len = sizeof(priv->config),
+               .buf = priv->config
+       };
+
+       switch (voltage) {
+       case SEC_VOLTAGE_OFF:
+               data1_reg = 0x00;
+               vsel = "Off";
+               break;
+       case SEC_VOLTAGE_13:
+               data1_reg = LNBH25_VSEL_13;
+               vsel = "13V";
+               break;
+       case SEC_VOLTAGE_18:
+               data1_reg = LNBH25_VSEL_18;
+               vsel = "18V";
+               break;
+       default:
+               return -EINVAL;
+       }
+       priv->config[1] = data1_reg;
+       dev_dbg(&priv->i2c->dev,
+               "%s(): %s, I2C 0x%x write [ %02x %02x %02x ]\n",
+               __func__, vsel, priv->i2c_address,
+               priv->config[0], priv->config[1], priv->config[2]);
+       ret = i2c_transfer(priv->i2c, &msg, 1);
+       if (ret >= 0 && ret != 1)
+               ret = -EIO;
+       if (ret < 0) {
+               dev_err(&priv->i2c->dev, "%s(): I2C transfer error (%d)\n",
+                       __func__, ret);
+               return ret;
+       }
+       if (voltage != SEC_VOLTAGE_OFF) {
+               msleep(120);
+               ret = lnbh25_read_vmon(priv);
+       } else {
+               msleep(20);
+               ret = 0;
+       }
+       return ret;
+}
+
+static void lnbh25_release(struct dvb_frontend *fe)
+{
+       struct lnbh25_priv *priv = fe->sec_priv;
+
+       dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
+       lnbh25_set_voltage(fe, SEC_VOLTAGE_OFF);
+       kfree(fe->sec_priv);
+       fe->sec_priv = NULL;
+}
+
+struct dvb_frontend *lnbh25_attach(struct dvb_frontend *fe,
+                                  struct lnbh25_config *cfg,
+                                  struct i2c_adapter *i2c)
+{
+       struct lnbh25_priv *priv;
+
+       dev_dbg(&i2c->dev, "%s()\n", __func__);
+       priv = kzalloc(sizeof(struct lnbh25_priv), GFP_KERNEL);
+       if (!priv)
+               return NULL;
+       priv->i2c_address = (cfg->i2c_address >> 1);
+       priv->i2c = i2c;
+       priv->config[0] = 0x02;
+       priv->config[1] = 0x00;
+       priv->config[2] = cfg->data2_config;
+       fe->sec_priv = priv;
+       if (lnbh25_set_voltage(fe, SEC_VOLTAGE_OFF)) {
+               dev_err(&i2c->dev,
+                       "%s(): no LNBH25 found at I2C addr 0x%02x\n",
+                       __func__, priv->i2c_address);
+               kfree(priv);
+               fe->sec_priv = NULL;
+               return NULL;
+       }
+
+       fe->ops.release_sec = lnbh25_release;
+       fe->ops.set_voltage = lnbh25_set_voltage;
+
+       dev_err(&i2c->dev, "%s(): attached at I2C addr 0x%02x\n",
+               __func__, priv->i2c_address);
+       return fe;
+}
+EXPORT_SYMBOL(lnbh25_attach);
+
+MODULE_DESCRIPTION("ST LNBH25 driver");
+MODULE_AUTHOR("info@netup.ru");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/dvb-frontends/lnbh25.h b/drivers/media/dvb-frontends/lnbh25.h
new file mode 100644 (file)
index 0000000..69f30e2
--- /dev/null
@@ -0,0 +1,56 @@
+/*
+ * lnbh25.c
+ *
+ * Driver for LNB supply and control IC LNBH25
+ *
+ * Copyright (C) 2014 NetUP Inc.
+ * Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
+ * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
+ *
+ * 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.
+ */
+
+#ifndef LNBH25_H
+#define LNBH25_H
+
+#include <linux/i2c.h>
+#include <linux/kconfig.h>
+#include <linux/dvb/frontend.h>
+
+/* 22 kHz tone enabled. Tone output controlled by DSQIN pin */
+#define        LNBH25_TEN      0x01
+/* Low power mode activated (used only with 22 kHz tone output disabled) */
+#define LNBH25_LPM     0x02
+/* DSQIN input pin is set to receive external 22 kHz TTL signal source */
+#define LNBH25_EXTM    0x04
+
+struct lnbh25_config {
+       u8      i2c_address;
+       u8      data2_config;
+};
+
+#if IS_REACHABLE(CONFIG_DVB_LNBH25)
+struct dvb_frontend *lnbh25_attach(
+       struct dvb_frontend *fe,
+       struct lnbh25_config *cfg,
+       struct i2c_adapter *i2c);
+#else
+static inline dvb_frontend *lnbh25_attach(
+       struct dvb_frontend *fe,
+       struct lnbh25_config *cfg,
+       struct i2c_adapter *i2c)
+{
+       printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+       return NULL;
+}
+#endif
+
+#endif