[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/media/dvb-frontends/isl6421.c b/src/kernel/linux/v4.14/drivers/media/dvb-frontends/isl6421.c
new file mode 100644
index 0000000..3f34878
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/media/dvb-frontends/isl6421.c
@@ -0,0 +1,234 @@
+/*
+ * 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.
+ *
+ * To obtain the license, point your browser to
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ *
+ * the project's page is at https://linuxtv.org
+ */
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.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;
+ bool is_off;
+};
+
+static int isl6421_set_voltage(struct dvb_frontend *fe,
+ enum fe_sec_voltage voltage)
+{
+ int ret;
+ u8 buf;
+ bool is_off;
+ struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
+ struct i2c_msg msg[2] = {
+ {
+ .addr = isl6421->i2c_addr,
+ .flags = 0,
+ .buf = &isl6421->config,
+ .len = 1,
+ }, {
+ .addr = isl6421->i2c_addr,
+ .flags = I2C_M_RD,
+ .buf = &buf,
+ .len = 1,
+ }
+
+ };
+
+ isl6421->config &= ~(ISL6421_VSEL1 | ISL6421_EN1);
+
+ switch(voltage) {
+ case SEC_VOLTAGE_OFF:
+ is_off = true;
+ break;
+ case SEC_VOLTAGE_13:
+ is_off = false;
+ isl6421->config |= ISL6421_EN1;
+ break;
+ case SEC_VOLTAGE_18:
+ is_off = false;
+ isl6421->config |= (ISL6421_EN1 | ISL6421_VSEL1);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /*
+ * If LNBf were not powered on, disable dynamic current limit, as,
+ * according with datasheet, highly capacitive load on the output may
+ * cause a difficult start-up.
+ */
+ if (isl6421->is_off && !is_off)
+ isl6421->config |= ISL6421_DCL;
+
+ isl6421->config |= isl6421->override_or;
+ isl6421->config &= isl6421->override_and;
+
+ ret = i2c_transfer(isl6421->i2c, msg, 2);
+ if (ret < 0)
+ return ret;
+ if (ret != 2)
+ return -EIO;
+
+ /* Store off status now incase future commands fail */
+ isl6421->is_off = is_off;
+
+ /* On overflow, the device will try again after 900 ms (typically) */
+ if (!is_off && (buf & ISL6421_OLF1))
+ msleep(1000);
+
+ /* Re-enable dynamic current limit */
+ if ((isl6421->config & ISL6421_DCL) &&
+ !(isl6421->override_or & ISL6421_DCL)) {
+ isl6421->config &= ~ISL6421_DCL;
+
+ ret = i2c_transfer(isl6421->i2c, msg, 2);
+ if (ret < 0)
+ return ret;
+ if (ret != 2)
+ return -EIO;
+ }
+
+ /* Check if overload flag is active. If so, disable power */
+ if (!is_off && (buf & ISL6421_OLF1)) {
+ isl6421->config &= ~(ISL6421_VSEL1 | ISL6421_EN1);
+ ret = i2c_transfer(isl6421->i2c, msg, 1);
+ if (ret < 0)
+ return ret;
+ if (ret != 1)
+ return -EIO;
+ isl6421->is_off = true;
+
+ dev_warn(&isl6421->i2c->dev,
+ "Overload current detected. disabling LNBf power\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int isl6421_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
+{
+ struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_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 int isl6421_set_tone(struct dvb_frontend *fe,
+ enum fe_sec_tone_mode tone)
+{
+ struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
+ struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
+ .buf = &isl6421->config,
+ .len = sizeof(isl6421->config) };
+
+ switch (tone) {
+ case SEC_TONE_ON:
+ isl6421->config |= ISL6421_ENT1;
+ break;
+ case SEC_TONE_OFF:
+ isl6421->config &= ~ISL6421_ENT1;
+ 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 void isl6421_release(struct dvb_frontend *fe)
+{
+ /* power off */
+ isl6421_set_voltage(fe, SEC_VOLTAGE_OFF);
+
+ /* free */
+ kfree(fe->sec_priv);
+ fe->sec_priv = NULL;
+}
+
+struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
+ u8 override_set, u8 override_clear, bool override_tone)
+{
+ struct isl6421 *isl6421 = kmalloc(sizeof(struct isl6421), GFP_KERNEL);
+ if (!isl6421)
+ return NULL;
+
+ /* default configuration */
+ isl6421->config = ISL6421_ISEL1;
+ isl6421->i2c = i2c;
+ isl6421->i2c_addr = i2c_addr;
+ fe->sec_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->sec_priv = NULL;
+ return NULL;
+ }
+
+ isl6421->is_off = true;
+
+ /* install release callback */
+ fe->ops.release_sec = isl6421_release;
+
+ /* override frontend ops */
+ fe->ops.set_voltage = isl6421_set_voltage;
+ fe->ops.enable_high_lnb_voltage = isl6421_enable_high_lnb_voltage;
+ if (override_tone)
+ fe->ops.set_tone = isl6421_set_tone;
+
+ return fe;
+}
+EXPORT_SYMBOL(isl6421_attach);
+
+MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6421");
+MODULE_AUTHOR("Andrew de Quincey & Oliver Endriss");
+MODULE_LICENSE("GPL");