V4L/DVB (3739): Add support for FE_GET_FRONTEND to or51132 frontend

Adds the FE_GET_FRONTEND ioctl to the or51132 frontend.  Current modulation is
read from the hardware, while frequency is taken from the driver's state.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/or51132.c b/drivers/media/dvb/frontends/or51132.c
index 619856b076cd..c25ec73440e7 100644
--- a/drivers/media/dvb/frontends/or51132.c
+++ b/drivers/media/dvb/frontends/or51132.c
@@ -400,6 +400,44 @@ static int or51132_set_parameters(struct dvb_frontend* fe,
         return 0;
 }
 
+static int or51132_get_parameters(struct dvb_frontend* fe,
+                                  struct dvb_frontend_parameters *param)
+{
+        struct or51132_state* state = fe->demodulator_priv;
+        u8 buf[2];
+
+        /* Receiver Status */
+        buf[0]=0x04;
+        buf[1]=0x00;
+        msleep(30); /* 30ms */
+        if (i2c_writebytes(state,state->config->demod_address,buf,2)) {
+                printk(KERN_WARNING "or51132: get_parameters write error\n");
+                return -EREMOTEIO;
+        }
+        msleep(30); /* 30ms */
+        if (i2c_readbytes(state,state->config->demod_address,buf,2)) {
+                printk(KERN_WARNING "or51132: get_parameters read error\n");
+                return -EREMOTEIO;
+        }
+        switch(buf[0]) {
+                case 0x06: param->u.vsb.modulation = VSB_8; break;
+                case 0x43: param->u.vsb.modulation = QAM_64; break;
+                case 0x45: param->u.vsb.modulation = QAM_256; break;
+                default:
+                        printk(KERN_WARNING "or51132: unknown status 0x%02x\n",
+                               buf[0]);
+                        return -EREMOTEIO;
+        }
+
+        /* FIXME: Read frequency from frontend, take AFC into account */
+        param->frequency = state->current_frequency;
+
+        /* FIXME: How to read inversion setting? Receiver 6 register? */
+        param->inversion = INVERSION_AUTO;
+
+        return 0;
+}
+
 static int or51132_read_status(struct dvb_frontend* fe, fe_status_t* status)
 {
         struct or51132_state* state = fe->demodulator_priv;
@@ -618,6 +656,7 @@ static struct dvb_frontend_ops or51132_ops = {
         .sleep = or51132_sleep,
 
         .set_frontend = or51132_set_parameters,
+        .get_frontend = or51132_get_parameters,
         .get_tune_settings = or51132_get_tune_settings,
 
         .read_status = or51132_read_status,