--- /dev/null
+/*
+ * Allegro A8293 SEC driver
+ *
+ * Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "dvb_frontend.h"
+#include "a8293.h"
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
+
+#define LOG_PREFIX "a8293"
+
+#undef dbg
+#define dbg(f, arg...) \
+ if (debug) \
+ printk(KERN_INFO LOG_PREFIX": " f "\n" , ## arg)
+#undef err
+#define err(f, arg...) printk(KERN_ERR LOG_PREFIX": " f "\n" , ## arg)
+#undef info
+#define info(f, arg...) printk(KERN_INFO LOG_PREFIX": " f "\n" , ## arg)
+#undef warn
+#define warn(f, arg...) printk(KERN_WARNING LOG_PREFIX": " f "\n" , ## arg)
+
+
+struct a8293_priv {
+ struct i2c_adapter *i2c;
+ const struct a8293_config *cfg;
+ u8 reg[2];
+};
+
+static int a8293_i2c(struct a8293_priv *priv, u8 *val, int len, bool rd)
+{
+ int ret;
+ struct i2c_msg msg[1] = {
+ {
+ .addr = priv->cfg->i2c_addr,
+ .len = len,
+ .buf = val,
+ }
+ };
+
+ if (rd)
+ msg[0].flags = I2C_M_RD;
+ else
+ msg[0].flags = 0;
+
+ ret = i2c_transfer(priv->i2c, msg, 1);
+ if (ret == 1) {
+ ret = 0;
+ } else {
+ warn("i2c failed=%d rd=%d", ret, rd);
+ ret = -EREMOTEIO;
+ }
+
+ return ret;
+}
+
+static int a8293_wr(struct a8293_priv *priv, u8 *val, int len)
+{
+ return a8293_i2c(priv, val, len, 0);
+}
+
+static int a8293_rd(struct a8293_priv *priv, u8 *val, int len)
+{
+ return a8293_i2c(priv, val, len, 1);
+}
+
+static int a8293_set_voltage(struct dvb_frontend *fe,
+ fe_sec_voltage_t fe_sec_voltage)
+{
+ struct a8293_priv *priv = fe->sec_priv;
+ int ret;
+
+ dbg("%s: fe_sec_voltage=%d", __func__, fe_sec_voltage);
+
+ switch (fe_sec_voltage) {
+ case SEC_VOLTAGE_OFF:
+ /* ENB=0 */
+ priv->reg[0] = 0x10;
+ break;
+ case SEC_VOLTAGE_13:
+ /* VSEL0=1, VSEL1=0, VSEL2=0, VSEL3=0, ENB=1*/
+ priv->reg[0] = 0x31;
+ break;
+ case SEC_VOLTAGE_18:
+ /* VSEL0=0, VSEL1=0, VSEL2=0, VSEL3=1, ENB=1*/
+ priv->reg[0] = 0x38;
+ break;
+ default:
+ ret = -EINVAL;
+ goto err;
+ };
+
+ ret = a8293_wr(priv, &priv->reg[0], 1);
+ if (ret)
+ goto err;
+
+ return ret;
+err:
+ dbg("%s: failed=%d", __func__, ret);
+ return ret;
+}
+
+static void a8293_release_sec(struct dvb_frontend *fe)
+{
+ dbg("%s:", __func__);
+
+ a8293_set_voltage(fe, SEC_VOLTAGE_OFF);
+
+ kfree(fe->sec_priv);
+ fe->sec_priv = NULL;
+}
+
+struct dvb_frontend *a8293_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c, const struct a8293_config *cfg)
+{
+ int ret;
+ struct a8293_priv *priv = NULL;
+ u8 buf[2];
+
+ /* allocate memory for the internal priv */
+ priv = kzalloc(sizeof(struct a8293_priv), GFP_KERNEL);
+ if (priv == NULL) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ /* setup the priv */
+ priv->i2c = i2c;
+ priv->cfg = cfg;
+ fe->sec_priv = priv;
+
+ /* check if the SEC is there */
+ ret = a8293_rd(priv, buf, 2);
+ if (ret)
+ goto err;
+
+ /* ENB=0 */
+ priv->reg[0] = 0x10;
+ ret = a8293_wr(priv, &priv->reg[1], 1);
+ if (ret)
+ goto err;
+
+ /* TMODE=0, TGATE=1 */
+ priv->reg[1] = 0x82;
+ ret = a8293_wr(priv, &priv->reg[1], 1);
+ if (ret)
+ goto err;
+
+ info("Allegro A8293 SEC attached.");
+
+ fe->ops.release_sec = a8293_release_sec;
+
+ /* override frontend ops */
+ fe->ops.set_voltage = a8293_set_voltage;
+
+ return fe;
+err:
+ dbg("%s: failed=%d", __func__, ret);
+ kfree(priv);
+ return NULL;
+}
+EXPORT_SYMBOL(a8293_attach);
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Allegro A8293 SEC driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Allegro A8293 SEC driver
+ *
+ * Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef A8293_H
+#define A8293_H
+
+struct a8293_config {
+ u8 i2c_addr;
+};
+
+#if defined(CONFIG_DVB_A8293) || \
+ (defined(CONFIG_DVB_A8293_MODULE) && defined(MODULE))
+extern struct dvb_frontend *a8293_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c, const struct a8293_config *cfg);
+#else
+static inline struct dvb_frontend *a8293_attach(struct dvb_frontend *fe,
+ struct i2c_adapter *i2c, const struct a8293_config *cfg)
+{
+ printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+ return NULL;
+}
+#endif
+
+#endif /* A8293_H */
projects / firefly-linux-kernel-4.4.55.git / commitdiff