V4L/DVB (6590): Adding support for VHF with MT2266-devices
MT2266 :
- support for VHF
- Minor enhancements
Signed-off-by: Olivier DANET <odanet@caramail.com>
Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/dvb/frontends/mt2266.c b/drivers/media/dvb/frontends/mt2266.c
index 03fe826..54b18f9 100644
--- a/drivers/media/dvb/frontends/mt2266.c
+++ b/drivers/media/dvb/frontends/mt2266.c
@@ -38,8 +38,12 @@
u32 frequency;
u32 bandwidth;
+ u8 band;
};
+#define MT2266_VHF 1
+#define MT2266_UHF 0
+
/* Here, frequencies are expressed in kiloHertz to avoid 32 bits overflows */
static int debug;
@@ -90,26 +94,30 @@
}
// Initialisation sequences
-static u8 mt2266_init1[] = {
- REG_TUNE,
- 0x00, 0x00, 0x28, 0x00, 0x52, 0x99, 0x3f };
+static u8 mt2266_init1[] = { REG_TUNE, 0x00, 0x00, 0x28,
+ 0x00, 0x52, 0x99, 0x3f };
static u8 mt2266_init2[] = {
- 0x17, 0x6d, 0x71, 0x61, 0xc0, 0xbf, 0xff, 0xdc, 0x00, 0x0a,
- 0xd4, 0x03, 0x64, 0x64, 0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14, 0x01, 0x01, 0x01, 0x01,
- 0x01, 0x01, 0x7f, 0x5e, 0x3f, 0xff, 0xff, 0xff, 0x00, 0x77, 0x0f, 0x2d };
+ 0x17, 0x6d, 0x71, 0x61, 0xc0, 0xbf, 0xff, 0xdc, 0x00, 0x0a, 0xd4,
+ 0x03, 0x64, 0x64, 0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14,
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x7f, 0x5e, 0x3f, 0xff, 0xff,
+ 0xff, 0x00, 0x77, 0x0f, 0x2d
+};
-static u8 mt2266_init_8mhz[] = {
- REG_BANDWIDTH,
- 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22 };
+static u8 mt2266_init_8mhz[] = { REG_BANDWIDTH, 0x22, 0x22, 0x22, 0x22,
+ 0x22, 0x22, 0x22, 0x22 };
-static u8 mt2266_init_7mhz[] = {
- REG_BANDWIDTH,
- 0x32, 0x32, 0x32, 0x32, 0x32, 0x32, 0x32, 0x32 };
+static u8 mt2266_init_7mhz[] = { REG_BANDWIDTH, 0x32, 0x32, 0x32, 0x32,
+ 0x32, 0x32, 0x32, 0x32 };
-static u8 mt2266_init_6mhz[] = {
- REG_BANDWIDTH,
- 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7, 0xa7 };
+static u8 mt2266_init_6mhz[] = { REG_BANDWIDTH, 0xa7, 0xa7, 0xa7, 0xa7,
+ 0xa7, 0xa7, 0xa7, 0xa7 };
+
+static u8 mt2266_uhf[] = { 0x1d, 0xdc, 0x00, 0x0a, 0xd4, 0x03, 0x64, 0x64,
+ 0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14 };
+
+static u8 mt2266_vhf[] = { 0x1d, 0xfe, 0x00, 0x00, 0xb4, 0x03, 0xa5, 0xa5,
+ 0xa5, 0xa5, 0x82, 0xaa, 0xf1, 0x17, 0x80, 0x1f };
#define FREF 30000 // Quartz oscillator 30 MHz
@@ -122,35 +130,78 @@
u8 lnaband;
u8 b[10];
int i;
+ u8 band;
priv = fe->tuner_priv;
- mt2266_writereg(priv,0x17,0x6d);
- mt2266_writereg(priv,0x1c,0xff);
-
freq = params->frequency / 1000; // Hz -> kHz
+ if (freq < 470000 && freq > 230000)
+ return -EINVAL; /* Gap between VHF and UHF bands */
priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;
priv->frequency = freq * 1000;
- tune=2 * freq * (8192/16) / (FREF/16);
- if (freq <= 495000) lnaband = 0xEE; else
- if (freq <= 525000) lnaband = 0xDD; else
- if (freq <= 550000) lnaband = 0xCC; else
- if (freq <= 580000) lnaband = 0xBB; else
- if (freq <= 605000) lnaband = 0xAA; else
- if (freq <= 630000) lnaband = 0x99; else
- if (freq <= 655000) lnaband = 0x88; else
- if (freq <= 685000) lnaband = 0x77; else
- if (freq <= 710000) lnaband = 0x66; else
- if (freq <= 735000) lnaband = 0x55; else
- if (freq <= 765000) lnaband = 0x44; else
- if (freq <= 802000) lnaband = 0x33; else
- if (freq <= 840000) lnaband = 0x22; else lnaband = 0x11;
+ tune = 2 * freq * (8192/16) / (FREF/16);
+ band = (freq < 300000) ? MT2266_VHF : MT2266_UHF;
+ if (band == MT2266_VHF)
+ tune *= 2;
- msleep(100);
- mt2266_writeregs(priv,(params->u.ofdm.bandwidth==BANDWIDTH_6_MHZ)?mt2266_init_6mhz:
- (params->u.ofdm.bandwidth==BANDWIDTH_7_MHZ)?mt2266_init_7mhz:
- mt2266_init_8mhz,sizeof(mt2266_init_8mhz));
+ switch (params->u.ofdm.bandwidth) {
+ case BANDWIDTH_6_MHZ:
+ mt2266_writeregs(priv, mt2266_init_6mhz,
+ sizeof(mt2266_init_6mhz));
+ break;
+ case BANDWIDTH_7_MHZ:
+ mt2266_writeregs(priv, mt2266_init_7mhz,
+ sizeof(mt2266_init_7mhz));
+ break;
+ case BANDWIDTH_8_MHZ:
+ default:
+ mt2266_writeregs(priv, mt2266_init_8mhz,
+ sizeof(mt2266_init_8mhz));
+ break;
+ }
+
+ if (band == MT2266_VHF && priv->band == MT2266_UHF) {
+ dprintk("Switch from UHF to VHF");
+ mt2266_writereg(priv, 0x05, 0x04);
+ mt2266_writereg(priv, 0x19, 0x61);
+ mt2266_writeregs(priv, mt2266_vhf, sizeof(mt2266_vhf));
+ } else if (band == MT2266_UHF && priv->band == MT2266_VHF) {
+ dprintk("Switch from VHF to UHF");
+ mt2266_writereg(priv, 0x05, 0x52);
+ mt2266_writereg(priv, 0x19, 0x61);
+ mt2266_writeregs(priv, mt2266_uhf, sizeof(mt2266_uhf));
+ }
+ msleep(10);
+
+ if (freq <= 495000)
+ lnaband = 0xEE;
+ else if (freq <= 525000)
+ lnaband = 0xDD;
+ else if (freq <= 550000)
+ lnaband = 0xCC;
+ else if (freq <= 580000)
+ lnaband = 0xBB;
+ else if (freq <= 605000)
+ lnaband = 0xAA;
+ else if (freq <= 630000)
+ lnaband = 0x99;
+ else if (freq <= 655000)
+ lnaband = 0x88;
+ else if (freq <= 685000)
+ lnaband = 0x77;
+ else if (freq <= 710000)
+ lnaband = 0x66;
+ else if (freq <= 735000)
+ lnaband = 0x55;
+ else if (freq <= 765000)
+ lnaband = 0x44;
+ else if (freq <= 802000)
+ lnaband = 0x33;
+ else if (freq <= 840000)
+ lnaband = 0x22;
+ else
+ lnaband = 0x11;
b[0] = REG_TUNE;
b[1] = (tune >> 8) & 0x1F;
@@ -158,47 +209,54 @@
b[3] = tune >> 13;
mt2266_writeregs(priv,b,4);
- dprintk("set_parms: tune=%d band=%d",(int)tune,(int)lnaband);
- dprintk("set_parms: [1..3]: %2x %2x %2x",(int)b[1],(int)b[2],(int)b[3]);
+ dprintk("set_parms: tune=%d band=%d %s",
+ (int) tune, (int) lnaband,
+ (band == MT2266_UHF) ? "UHF" : "VHF");
+ dprintk("set_parms: [1..3]: %2x %2x %2x",
+ (int) b[1], (int) b[2], (int)b[3]);
- b[0] = 0x05;
- b[1] = 0x62;
- b[2] = lnaband;
- mt2266_writeregs(priv,b,3);
+ if (band == MT2266_UHF) {
+ b[0] = 0x05;
+ b[1] = (priv->band == MT2266_VHF) ? 0x52 : 0x62;
+ b[2] = lnaband;
+ mt2266_writeregs(priv, b, 3);
+ }
- //Waits for pll lock or timeout
+ /* Wait for pll lock or timeout */
i = 0;
do {
mt2266_readreg(priv,REG_LOCK,b);
- if ((b[0] & 0x40)==0x40)
+ if (b[0] & 0x40)
break;
msleep(10);
i++;
} while (i<10);
dprintk("Lock when i=%i",(int)i);
+
+ if (band == MT2266_UHF && priv->band == MT2266_VHF)
+ mt2266_writereg(priv, 0x05, 0x62);
+
+ priv->band = band;
+
return ret;
}
static void mt2266_calibrate(struct mt2266_priv *priv)
{
- mt2266_writereg(priv,0x11,0x03);
- mt2266_writereg(priv,0x11,0x01);
-
- mt2266_writeregs(priv,mt2266_init1,sizeof(mt2266_init1));
- mt2266_writeregs(priv,mt2266_init2,sizeof(mt2266_init2));
-
- mt2266_writereg(priv,0x33,0x5e);
- mt2266_writereg(priv,0x10,0x10);
- mt2266_writereg(priv,0x10,0x00);
-
- mt2266_writeregs(priv,mt2266_init_8mhz,sizeof(mt2266_init_8mhz));
-
+ mt2266_writereg(priv, 0x11, 0x03);
+ mt2266_writereg(priv, 0x11, 0x01);
+ mt2266_writeregs(priv, mt2266_init1, sizeof(mt2266_init1));
+ mt2266_writeregs(priv, mt2266_init2, sizeof(mt2266_init2));
+ mt2266_writereg(priv, 0x33, 0x5e);
+ mt2266_writereg(priv, 0x10, 0x10);
+ mt2266_writereg(priv, 0x10, 0x00);
+ mt2266_writeregs(priv, mt2266_init_8mhz, sizeof(mt2266_init_8mhz));
msleep(25);
- mt2266_writereg(priv,0x17,0x6d);
- mt2266_writereg(priv,0x1c,0x00);
+ mt2266_writereg(priv, 0x17, 0x6d);
+ mt2266_writereg(priv, 0x1c, 0x00);
msleep(75);
- mt2266_writereg(priv,0x17,0x6d);
- mt2266_writereg(priv,0x1c,0xff);
+ mt2266_writereg(priv, 0x17, 0x6d);
+ mt2266_writereg(priv, 0x1c, 0xff);
}
static int mt2266_get_frequency(struct dvb_frontend *fe, u32 *frequency)
@@ -217,17 +275,22 @@
static int mt2266_init(struct dvb_frontend *fe)
{
+ int ret;
struct mt2266_priv *priv = fe->tuner_priv;
- mt2266_writereg(priv,0x17,0x6d);
- mt2266_writereg(priv,0x1c,0xff);
+ ret = mt2266_writereg(priv, 0x17, 0x6d);
+ if (ret < 0)
+ return ret;
+ ret = mt2266_writereg(priv, 0x1c, 0xff);
+ if (ret < 0)
+ return ret;
return 0;
}
static int mt2266_sleep(struct dvb_frontend *fe)
{
struct mt2266_priv *priv = fe->tuner_priv;
- mt2266_writereg(priv,0x17,0x6d);
- mt2266_writereg(priv,0x1c,0x00);
+ mt2266_writereg(priv, 0x17, 0x6d);
+ mt2266_writereg(priv, 0x1c, 0x00);
return 0;
}
@@ -241,8 +304,8 @@
static const struct dvb_tuner_ops mt2266_tuner_ops = {
.info = {
.name = "Microtune MT2266",
- .frequency_min = 470000000,
- .frequency_max = 860000000,
+ .frequency_min = 174000000,
+ .frequency_max = 862000000,
.frequency_step = 50000,
},
.release = mt2266_release,
@@ -264,8 +327,9 @@
priv->cfg = cfg;
priv->i2c = i2c;
+ priv->band = MT2266_UHF;
- if (mt2266_readreg(priv,0,&id) != 0) {
+ if (mt2266_readreg(priv, 0, &id)) {
kfree(priv);
return NULL;
}