--- /dev/null
+/*
+ * 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");
Code Review / kvmfornfv.git / blobdiff