V4L/DVB (13673): lnbp21: Implement 22 kHz tone control

Support 22 kHz tone control for lnbp21 and lnbh24.
(Overrides the 'set_tone' hook of the frontend driver.)

Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Acked-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 27 insertions, 1 deletions

diff --git a/drivers/media/dvb/frontends/lnbp21.c b/drivers/media/dvb/frontends/lnbp21.c
index 71f607fe8fc7..b181bf023ada 100644
--- a/drivers/media/dvb/frontends/lnbp21.c
+++ b/drivers/media/dvb/frontends/lnbp21.c
@@ -1,7 +1,7 @@
 /*
  * lnbp21.c - driver for lnb supply and control ic lnbp21
  *
- * Copyright (C) 2006 Oliver Endriss
+ * Copyright (C) 2006, 2009 Oliver Endriss <o.endriss@gmx.de>
  * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
  *
  * This program is free software; you can redistribute it and/or
@@ -91,6 +91,31 @@ static int lnbp21_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
         return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
 }
 
+static int lnbp21_set_tone(struct dvb_frontend *fe,
+                                fe_sec_tone_mode_t tone)
+{
+        struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv;
+        struct i2c_msg msg = {  .addr = lnbp21->i2c_addr, .flags = 0,
+                                .buf = &lnbp21->config,
+                                .len = sizeof(lnbp21->config) };
+
+        switch (tone) {
+        case SEC_TONE_OFF:
+                lnbp21->config &= ~LNBP21_TEN;
+                break;
+        case SEC_TONE_ON:
+                lnbp21->config |= LNBP21_TEN;
+                break;
+        default:
+                return -EINVAL;
+        };
+
+        lnbp21->config |= lnbp21->override_or;
+        lnbp21->config &= lnbp21->override_and;
+
+        return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
+}
+
 static void lnbp21_release(struct dvb_frontend *fe)
 {
         /* LNBP power off */
@@ -133,6 +158,7 @@ static struct dvb_frontend *lnbx2x_attach(struct dvb_frontend *fe,
         /* override frontend ops */
         fe->ops.set_voltage = lnbp21_set_voltage;
         fe->ops.enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage;
+        fe->ops.set_tone = lnbp21_set_tone;
         printk(KERN_INFO "LNBx2x attached on addr=%x\n", lnbp21->i2c_addr);
 
         return fe;