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@@ -0,0 +1,184 @@
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+/*
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+ * Allegro A8293 SEC driver
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+ *
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+ * Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License along
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+ * with this program; if not, write to the Free Software Foundation, Inc.,
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+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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+ */
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+
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+#include "dvb_frontend.h"
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+#include "a8293.h"
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+
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+static int debug;
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+module_param(debug, int, 0644);
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+MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
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+
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+#define LOG_PREFIX "a8293"
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+
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+#undef dbg
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+#define dbg(f, arg...) \
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+ if (debug) \
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+ printk(KERN_INFO LOG_PREFIX": " f "\n" , ## arg)
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+#undef err
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+#define err(f, arg...) printk(KERN_ERR LOG_PREFIX": " f "\n" , ## arg)
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+#undef info
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+#define info(f, arg...) printk(KERN_INFO LOG_PREFIX": " f "\n" , ## arg)
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+#undef warn
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+#define warn(f, arg...) printk(KERN_WARNING LOG_PREFIX": " f "\n" , ## arg)
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+
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+
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+struct a8293_priv {
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+ struct i2c_adapter *i2c;
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+ const struct a8293_config *cfg;
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+ u8 reg[2];
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+};
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+
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+static int a8293_i2c(struct a8293_priv *priv, u8 *val, int len, bool rd)
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+{
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+ int ret;
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+ struct i2c_msg msg[1] = {
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+ {
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+ .addr = priv->cfg->i2c_addr,
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+ .len = len,
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+ .buf = val,
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+ }
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+ };
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+
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+ if (rd)
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+ msg[0].flags = I2C_M_RD;
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+ else
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+ msg[0].flags = 0;
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+
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+ ret = i2c_transfer(priv->i2c, msg, 1);
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+ if (ret == 1) {
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+ ret = 0;
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+ } else {
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+ warn("i2c failed=%d rd=%d", ret, rd);
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+ ret = -EREMOTEIO;
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+ }
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+
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+ return ret;
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+}
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+
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+static int a8293_wr(struct a8293_priv *priv, u8 *val, int len)
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+{
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+ return a8293_i2c(priv, val, len, 0);
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+}
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+
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+static int a8293_rd(struct a8293_priv *priv, u8 *val, int len)
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+{
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+ return a8293_i2c(priv, val, len, 1);
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+}
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+
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+static int a8293_set_voltage(struct dvb_frontend *fe,
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+ fe_sec_voltage_t fe_sec_voltage)
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+{
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+ struct a8293_priv *priv = fe->sec_priv;
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+ int ret;
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+
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+ dbg("%s: fe_sec_voltage=%d", __func__, fe_sec_voltage);
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+
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+ switch (fe_sec_voltage) {
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+ case SEC_VOLTAGE_OFF:
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+ /* ENB=0 */
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+ priv->reg[0] = 0x10;
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+ break;
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+ case SEC_VOLTAGE_13:
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+ /* VSEL0=1, VSEL1=0, VSEL2=0, VSEL3=0, ENB=1*/
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+ priv->reg[0] = 0x31;
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+ break;
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+ case SEC_VOLTAGE_18:
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+ /* VSEL0=0, VSEL1=0, VSEL2=0, VSEL3=1, ENB=1*/
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+ priv->reg[0] = 0x38;
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+ break;
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+ default:
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+ ret = -EINVAL;
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+ goto err;
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+ };
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+
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+ ret = a8293_wr(priv, &priv->reg[0], 1);
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+ if (ret)
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+ goto err;
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+
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+ return ret;
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+err:
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+ dbg("%s: failed=%d", __func__, ret);
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+ return ret;
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+}
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+
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+static void a8293_release_sec(struct dvb_frontend *fe)
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+{
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+ dbg("%s:", __func__);
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+
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+ a8293_set_voltage(fe, SEC_VOLTAGE_OFF);
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+
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+ kfree(fe->sec_priv);
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+ fe->sec_priv = NULL;
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+}
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+
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+struct dvb_frontend *a8293_attach(struct dvb_frontend *fe,
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+ struct i2c_adapter *i2c, const struct a8293_config *cfg)
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+{
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+ int ret;
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+ struct a8293_priv *priv = NULL;
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+ u8 buf[2];
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+
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+ /* allocate memory for the internal priv */
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+ priv = kzalloc(sizeof(struct a8293_priv), GFP_KERNEL);
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+ if (priv == NULL) {
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+ ret = -ENOMEM;
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+ goto err;
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+ }
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+
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+ /* setup the priv */
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+ priv->i2c = i2c;
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+ priv->cfg = cfg;
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+ fe->sec_priv = priv;
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+
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+ /* check if the SEC is there */
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+ ret = a8293_rd(priv, buf, 2);
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+ if (ret)
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+ goto err;
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+
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+ /* ENB=0 */
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+ priv->reg[0] = 0x10;
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+ ret = a8293_wr(priv, &priv->reg[1], 1);
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+ if (ret)
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+ goto err;
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+
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+ /* TMODE=0, TGATE=1 */
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+ priv->reg[1] = 0x82;
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+ ret = a8293_wr(priv, &priv->reg[1], 1);
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+ if (ret)
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+ goto err;
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+
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+ info("Allegro A8293 SEC attached.");
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+
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+ fe->ops.release_sec = a8293_release_sec;
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+
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+ /* override frontend ops */
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+ fe->ops.set_voltage = a8293_set_voltage;
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+
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+ return fe;
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+err:
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+ dbg("%s: failed=%d", __func__, ret);
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+ kfree(priv);
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+ return NULL;
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+}
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+EXPORT_SYMBOL(a8293_attach);
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+
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+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
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+MODULE_DESCRIPTION("Allegro A8293 SEC driver");
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+MODULE_LICENSE("GPL");
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Antti Palosaari