Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:
 - a new jpeg codec driver for Samsung Exynos (jpeg-hw-exynos4)
 - a new dvb frontend for ds2103 chipset (m88ds2103)
 - a new sensor driver for Samsung S5K5BAF UXGA (s5k5baf)
 - new drivers for R-Car VSP1
 - a new radio driver: radio-raremono
 - a new tuner driver for ts2022 chipset (m88ts2022)
 - the analog part of em28xx is now a separate module that only
   load/runs if the device is not a pure digital TV device
 - added a staging driver for bcm2048 radio devices
 - the omap 2 video driver (omap24xx) was moved to staging.  This driver
   is for an old hardware and uses a deprecated Kernel internal API.  If
   nobody cares enough to fix it, it would be removed on a couple Kernel
   releases
 - the sn9c102 driver was moved to staging.  This driver was replaced by
   gspca, and disabled on some distros, as almost all devices are known
   to work properly with gspca.  It should be removed from kernel on a
   couple Kernel releases
 - lots of driver fixes, improvements and cleanups

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (421 commits)
  [media] media: v4l2-dev: fix video device index assignment
  [media] rc-core: reuse device numbers
  [media] em28xx-cards: properly initialize the device bitmap
  [media] Staging: media: Fix line length exceeding 80 characters in as102_drv.c
  [media] Staging: media: Fix line length exceeding 80 characters in as102_fe.c
  [media] Staging: media: Fix quoted string split across line in as102_fe.c
  [media] media: st-rc: Add reset support
  [media] m2m-deinterlace: fix allocated struct type
  [media] radio-usb-si4713: fix sparse non static symbol warnings
  [media] em28xx-audio: remove needless check before usb_free_coherent()
  [media] au0828: Fix sparse non static symbol warning
  Revert "[media] go7007-usb: only use go->dev after allocated"
  [media] em28xx-audio: provide an error code when URB submit fails
  [media] em28xx: fix check for audio only usb interfaces when changing the usb alternate setting
  [media] em28xx: fix usb alternate setting for analog and digital video endpoints > 0
  [media] em28xx: make 'em28xx_ctrl_ops' static
  em28xx-alsa: Fix error patch for init/fini
  [media] em28xx-audio: flush work at .fini
  [media] drxk: remove the option to load firmware asynchronously
  [media] em28xx: adjust period size at runtime
  ...

1 files changed, 546 insertions, 44 deletions

diff --git a/drivers/media/dvb-frontends/dib8000.c b/drivers/media/dvb-frontends/dib8000.c
index 6dbbee453ee1..1632d78a5479 100644
--- a/drivers/media/dvb-frontends/dib8000.c
+++ b/drivers/media/dvb-frontends/dib8000.c
@@ -11,6 +11,7 @@
 #include <linux/slab.h>
 #include <linux/i2c.h>
 #include <linux/mutex.h>
+#include <asm/div64.h>
 
 #include "dvb_math.h"
 
@@ -118,6 +119,12 @@ struct dib8000_state {
 	u8 longest_intlv_layer;
 	u16 output_mode;
 
+	/* for DVBv5 stats */
+	s64 init_ucb;
+	unsigned long per_jiffies_stats;
+	unsigned long ber_jiffies_stats;
+	unsigned long ber_jiffies_stats_layer[3];
+
 #ifdef DIB8000_AGC_FREEZE
 	u16 agc1_max;
 	u16 agc1_min;
@@ -157,15 +164,10 @@ static u16 dib8000_i2c_read16(struct i2c_device *i2c, u16 reg)
 	return ret;
 }
 
-static u16 dib8000_read_word(struct dib8000_state *state, u16 reg)
+static u16 __dib8000_read_word(struct dib8000_state *state, u16 reg)
 {
 	u16 ret;
 
-	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
-		dprintk("could not acquire lock");
-		return 0;
-	}
-
 	state->i2c_write_buffer[0] = reg >> 8;
 	state->i2c_write_buffer[1] = reg & 0xff;
 
@@ -183,6 +185,21 @@ static u16 dib8000_read_word(struct dib8000_state *state, u16 reg)
 		dprintk("i2c read error on %d", reg);
 
 	ret = (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1];
+
+	return ret;
+}
+
+static u16 dib8000_read_word(struct dib8000_state *state, u16 reg)
+{
+	u16 ret;
+
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return 0;
+	}
+
+	ret = __dib8000_read_word(state, reg);
+
 	mutex_unlock(&state->i2c_buffer_lock);
 
 	return ret;
@@ -192,8 +209,15 @@ static u32 dib8000_read32(struct dib8000_state *state, u16 reg)
 {
 	u16 rw[2];
 
-	rw[0] = dib8000_read_word(state, reg + 0);
-	rw[1] = dib8000_read_word(state, reg + 1);
+	if (mutex_lock_interruptible(&state->i2c_buffer_lock) < 0) {
+		dprintk("could not acquire lock");
+		return 0;
+	}
+
+	rw[0] = __dib8000_read_word(state, reg + 0);
+	rw[1] = __dib8000_read_word(state, reg + 1);
+
+	mutex_unlock(&state->i2c_buffer_lock);
 
 	return ((rw[0] << 16) | (rw[1]));
 }
@@ -787,7 +811,7 @@ int dib8000_update_pll(struct dvb_frontend *fe,
 			dprintk("PLL: Update ratio (prediv: %d, ratio: %d)", state->cfg.pll->pll_prediv, ratio);
 			dib8000_write_word(state, 901, (state->cfg.pll->pll_prediv << 8) | (ratio << 0)); /* only the PLL ratio is updated. */
 		}
-}
+	}
 
 	return 0;
 }
@@ -966,6 +990,45 @@ static u16 dib8000_identify(struct i2c_device *client)
 	return value;
 }
 
+static int dib8000_read_unc_blocks(struct dvb_frontend *fe, u32 *unc);
+
+static void dib8000_reset_stats(struct dvb_frontend *fe)
+{
+	struct dib8000_state *state = fe->demodulator_priv;
+	struct dtv_frontend_properties *c = &state->fe[0]->dtv_property_cache;
+	u32 ucb;
+
+	memset(&c->strength, 0, sizeof(c->strength));
+	memset(&c->cnr, 0, sizeof(c->cnr));
+	memset(&c->post_bit_error, 0, sizeof(c->post_bit_error));
+	memset(&c->post_bit_count, 0, sizeof(c->post_bit_count));
+	memset(&c->block_error, 0, sizeof(c->block_error));
+
+	c->strength.len = 1;
+	c->cnr.len = 1;
+	c->block_error.len = 1;
+	c->block_count.len = 1;
+	c->post_bit_error.len = 1;
+	c->post_bit_count.len = 1;
+
+	c->strength.stat[0].scale = FE_SCALE_DECIBEL;
+	c->strength.stat[0].uvalue = 0;
+
+	c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+	c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+
+	dib8000_read_unc_blocks(fe, &ucb);
+
+	state->init_ucb = -ucb;
+	state->ber_jiffies_stats = 0;
+	state->per_jiffies_stats = 0;
+	memset(&state->ber_jiffies_stats_layer, 0,
+	       sizeof(state->ber_jiffies_stats_layer));
+}
+
 static int dib8000_reset(struct dvb_frontend *fe)
 {
 	struct dib8000_state *state = fe->demodulator_priv;
@@ -1071,6 +1134,8 @@ static int dib8000_reset(struct dvb_frontend *fe)
 
 	dib8000_set_power_mode(state, DIB8000_POWER_INTERFACE_ONLY);
 
+	dib8000_reset_stats(fe);
+
 	return 0;
 }
 
@@ -2445,7 +2510,8 @@ static int dib8000_autosearch_start(struct dvb_frontend *fe)
 	if (state->revision == 0x8090)
 		internal = dib8000_read32(state, 23) / 1000;
 
-	if (state->autosearch_state == AS_SEARCHING_FFT) {
+	if ((state->revision >= 0x8002) &&
+	    (state->autosearch_state == AS_SEARCHING_FFT)) {
 		dib8000_write_word(state,  37, 0x0065); /* P_ctrl_pha_off_max default values */
 		dib8000_write_word(state, 116, 0x0000); /* P_ana_gain to 0 */
 
@@ -2481,7 +2547,8 @@ static int dib8000_autosearch_start(struct dvb_frontend *fe)
 		dib8000_write_word(state, 770, (dib8000_read_word(state, 770) & 0xdfff) | (1 << 13)); /* P_restart_ccg = 1 */
 		dib8000_write_word(state, 770, (dib8000_read_word(state, 770) & 0xdfff) | (0 << 13)); /* P_restart_ccg = 0 */
 		dib8000_write_word(state, 0, (dib8000_read_word(state, 0) & 0x7ff) | (0 << 15) | (1 << 13)); /* P_restart_search = 0; */
-	} else if (state->autosearch_state == AS_SEARCHING_GUARD) {
+	} else if ((state->revision >= 0x8002) &&
+		   (state->autosearch_state == AS_SEARCHING_GUARD)) {
 		c->transmission_mode = TRANSMISSION_MODE_8K;
 		c->guard_interval = GUARD_INTERVAL_1_8;
 		c->inversion = 0;
@@ -2583,7 +2650,8 @@ static int dib8000_autosearch_irq(struct dvb_frontend *fe)
 	struct dib8000_state *state = fe->demodulator_priv;
 	u16 irq_pending = dib8000_read_word(state, 1284);
 
-	if (state->autosearch_state == AS_SEARCHING_FFT) {
+	if ((state->revision >= 0x8002) &&
+	    (state->autosearch_state == AS_SEARCHING_FFT)) {
 		if (irq_pending & 0x1) {
 			dprintk("dib8000_autosearch_irq: max correlation result available");
 			return 3;
@@ -2853,6 +2921,91 @@ static int dib8090p_init_sdram(struct dib8000_state *state)
 	return 0;
 }
 
+/**
+ * is_manual_mode - Check if TMCC should be used for parameters settings
+ * @c:	struct dvb_frontend_properties
+ *
+ * By default, TMCC table should be used for parameter settings on most
+ * usercases. However, sometimes it is desirable to lock the demod to
+ * use the manual parameters.
+ *
+ * On manual mode, the current dib8000_tune state machine is very restrict:
+ * It requires that both per-layer and per-transponder parameters to be
+ * properly specified, otherwise the device won't lock.
+ *
+ * Check if all those conditions are properly satisfied before allowing
+ * the device to use the manual frequency lock mode.
+ */
+static int is_manual_mode(struct dtv_frontend_properties *c)
+{
+	int i, n_segs = 0;
+
+	/* Use auto mode on DVB-T compat mode */
+	if (c->delivery_system != SYS_ISDBT)
+		return 0;
+
+	/*
+	 * Transmission mode is only detected on auto mode, currently
+	 */
+	if (c->transmission_mode == TRANSMISSION_MODE_AUTO) {
+		dprintk("transmission mode auto");
+		return 0;
+	}
+
+	/*
+	 * Guard interval is only detected on auto mode, currently
+	 */
+	if (c->guard_interval == GUARD_INTERVAL_AUTO) {
+		dprintk("guard interval auto");
+		return 0;
+	}
+
+	/*
+	 * If no layer is enabled, assume auto mode, as at least one
+	 * layer should be enabled
+	 */
+	if (!c->isdbt_layer_enabled) {
+		dprintk("no layer modulation specified");
+		return 0;
+	}
+
+	/*
+	 * Check if the per-layer parameters aren't auto and
+	 * disable a layer if segment count is 0 or invalid.
+	 */
+	for (i = 0; i < 3; i++) {
+		if (!(c->isdbt_layer_enabled & 1 << i))
+			continue;
+
+		if ((c->layer[i].segment_count > 13) ||
+		    (c->layer[i].segment_count == 0)) {
+			c->isdbt_layer_enabled &= ~(1 << i);
+			continue;
+		}
+
+		n_segs += c->layer[i].segment_count;
+
+		if ((c->layer[i].modulation == QAM_AUTO) ||
+		    (c->layer[i].fec == FEC_AUTO)) {
+			dprintk("layer %c has either modulation or FEC auto",
+				'A' + i);
+			return 0;
+		}
+	}
+
+	/*
+	 * Userspace specified a wrong number of segments.
+	 *	fallback to auto mode.
+	 */
+	if (n_segs == 0 || n_segs > 13) {
+		dprintk("number of segments is invalid");
+		return 0;
+	}
+
+	/* Everything looks ok for manual mode */
+	return 1;
+}
+
 static int dib8000_tune(struct dvb_frontend *fe)
 {
 	struct dib8000_state *state = fe->demodulator_priv;
@@ -2878,40 +3031,19 @@ static int dib8000_tune(struct dvb_frontend *fe)
 
 	switch (*tune_state) {
 	case CT_DEMOD_START: /* 30 */
+			dib8000_reset_stats(fe);
+
 			if (state->revision == 0x8090)
 				dib8090p_init_sdram(state);
 			state->status = FE_STATUS_TUNE_PENDING;
-			if ((c->delivery_system != SYS_ISDBT) ||
-					(c->inversion == INVERSION_AUTO) ||
-					(c->transmission_mode == TRANSMISSION_MODE_AUTO) ||
-					(c->guard_interval == GUARD_INTERVAL_AUTO) ||
-					(((c->isdbt_layer_enabled & (1 << 0)) != 0) &&
-					 (c->layer[0].segment_count != 0xff) &&
-					 (c->layer[0].segment_count != 0) &&
-					 ((c->layer[0].modulation == QAM_AUTO) ||
-					  (c->layer[0].fec == FEC_AUTO))) ||
-					(((c->isdbt_layer_enabled & (1 << 1)) != 0) &&
-					 (c->layer[1].segment_count != 0xff) &&
-					 (c->layer[1].segment_count != 0) &&
-					 ((c->layer[1].modulation == QAM_AUTO) ||
-					  (c->layer[1].fec == FEC_AUTO))) ||
-					(((c->isdbt_layer_enabled & (1 << 2)) != 0) &&
-					 (c->layer[2].segment_count != 0xff) &&
-					 (c->layer[2].segment_count != 0) &&
-					 ((c->layer[2].modulation == QAM_AUTO) ||
-					  (c->layer[2].fec == FEC_AUTO))) ||
-					(((c->layer[0].segment_count == 0) ||
-					  ((c->isdbt_layer_enabled & (1 << 0)) == 0)) &&
-					 ((c->layer[1].segment_count == 0) ||
-					  ((c->isdbt_layer_enabled & (2 << 0)) == 0)) &&
-					 ((c->layer[2].segment_count == 0) || ((c->isdbt_layer_enabled & (3 << 0)) == 0))))
-				state->channel_parameters_set = 0; /* auto search */
-			else
-				state->channel_parameters_set = 1; /* channel parameters are known */
+			state->channel_parameters_set = is_manual_mode(c);
+
+			dprintk("Tuning channel on %s search mode",
+				state->channel_parameters_set ? "manual" : "auto");
 
 			dib8000_viterbi_state(state, 0); /* force chan dec in restart */
 
-			/* Layer monit */
+			/* Layer monitor */
 			dib8000_write_word(state, 285, dib8000_read_word(state, 285) & 0x60);
 
 			dib8000_set_frequency_offset(state);
@@ -3256,15 +3388,27 @@ static int dib8000_sleep(struct dvb_frontend *fe)
 	return dib8000_set_adc_state(state, DIBX000_SLOW_ADC_OFF) | dib8000_set_adc_state(state, DIBX000_ADC_OFF);
 }
 
+static int dib8000_read_status(struct dvb_frontend *fe, fe_status_t * stat);
+
 static int dib8000_get_frontend(struct dvb_frontend *fe)
 {
 	struct dib8000_state *state = fe->demodulator_priv;
 	u16 i, val = 0;
-	fe_status_t stat;
+	fe_status_t stat = 0;
 	u8 index_frontend, sub_index_frontend;
 
 	fe->dtv_property_cache.bandwidth_hz = 6000000;
 
+	/*
+	 * If called to early, get_frontend makes dib8000_tune to either
+	 * not lock or not sync. This causes dvbv5-scan/dvbv5-zap to fail.
+	 * So, let's just return if frontend 0 has not locked.
+	 */
+	dib8000_read_status(fe, &stat);
+	if (!(stat & FE_HAS_SYNC))
+		return 0;
+
+	dprintk("TMCC lock");
 	for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
 		state->fe[index_frontend]->ops.read_status(state->fe[index_frontend], &stat);
 		if (stat&FE_HAS_SYNC) {
@@ -3335,9 +3479,13 @@ static int dib8000_get_frontend(struct dvb_frontend *fe)
 		fe->dtv_property_cache.layer[i].segment_count = val & 0x0F;
 		dprintk("dib8000_get_frontend : Layer %d segments = %d ", i, fe->dtv_property_cache.layer[i].segment_count);
 
-		val = dib8000_read_word(state, 499 + i);
-		fe->dtv_property_cache.layer[i].interleaving = val & 0x3;
-		dprintk("dib8000_get_frontend : Layer %d time_intlv = %d ", i, fe->dtv_property_cache.layer[i].interleaving);
+		val = dib8000_read_word(state, 499 + i) & 0x3;
+		/* Interleaving can be 0, 1, 2 or 4 */
+		if (val == 3)
+			val = 4;
+		fe->dtv_property_cache.layer[i].interleaving = val;
+		dprintk("dib8000_get_frontend : Layer %d time_intlv = %d ",
+			i, fe->dtv_property_cache.layer[i].interleaving);
 
 		val = dib8000_read_word(state, 481 + i);
 		switch (val & 0x7) {
@@ -3556,6 +3704,8 @@ static int dib8000_set_frontend(struct dvb_frontend *fe)
 	return 0;
 }
 
+static int dib8000_get_stats(struct dvb_frontend *fe, fe_status_t stat);
+
 static int dib8000_read_status(struct dvb_frontend *fe, fe_status_t * stat)
 {
 	struct dib8000_state *state = fe->demodulator_priv;
@@ -3593,6 +3743,7 @@ static int dib8000_read_status(struct dvb_frontend *fe, fe_status_t * stat)
 		if (lock & 0x01)
 			*stat |= FE_HAS_VITERBI;
 	}
+	dib8000_get_stats(fe, *stat);
 
 	return 0;
 }
@@ -3699,6 +3850,357 @@ static int dib8000_read_snr(struct dvb_frontend *fe, u16 * snr)
 	return 0;
 }
 
+struct per_layer_regs {
+	u16 lock, ber, per;
+};
+
+static const struct per_layer_regs per_layer_regs[] = {
+	{ 554, 560, 562 },
+	{ 555, 576, 578 },
+	{ 556, 581, 583 },
+};
+
+struct linear_segments {
+	unsigned x;
+	signed y;
+};
+
+/*
+ * Table to estimate signal strength in dBm.
+ * This table was empirically determinated by measuring the signal
+ * strength generated by a DTA-2111 RF generator directly connected into
+ * a dib8076 device (a PixelView PV-D231U stick), using a good quality
+ * 3 meters RC6 cable and good RC6 connectors.
+ * The real value can actually be different on other devices, depending
+ * on several factors, like if LNA is enabled or not, if diversity is
+ * enabled, type of connectors, etc.
+ * Yet, it is better to use this measure in dB than a random non-linear
+ * percentage value, especially for antenna adjustments.
+ * On my tests, the precision of the measure using this table is about
+ * 0.5 dB, with sounds reasonable enough.
+ */
+static struct linear_segments strength_to_db_table[] = {
+	{ 55953, 108500 },	/* -22.5 dBm */
+	{ 55394, 108000 },
+	{ 53834, 107000 },
+	{ 52863, 106000 },
+	{ 52239, 105000 },
+	{ 52012, 104000 },
+	{ 51803, 103000 },
+	{ 51566, 102000 },
+	{ 51356, 101000 },
+	{ 51112, 100000 },
+	{ 50869,  99000 },
+	{ 50600,  98000 },
+	{ 50363,  97000 },
+	{ 50117,  96000 },	/* -35 dBm */
+	{ 49889,  95000 },
+	{ 49680,  94000 },
+	{ 49493,  93000 },
+	{ 49302,  92000 },
+	{ 48929,  91000 },
+	{ 48416,  90000 },
+	{ 48035,  89000 },
+	{ 47593,  88000 },
+	{ 47282,  87000 },
+	{ 46953,  86000 },
+	{ 46698,  85000 },
+	{ 45617,  84000 },
+	{ 44773,  83000 },
+	{ 43845,  82000 },
+	{ 43020,  81000 },
+	{ 42010,  80000 },	/* -51 dBm */
+	{     0,      0 },
+};
+
+static u32 interpolate_value(u32 value, struct linear_segments *segments,
+			     unsigned len)
+{
+	u64 tmp64;
+	u32 dx;
+	s32 dy;
+	int i, ret;
+
+	if (value >= segments[0].x)
+		return segments[0].y;
+	if (value < segments[len-1].x)
+		return segments[len-1].y;
+
+	for (i = 1; i < len - 1; i++) {
+		/* If value is identical, no need to interpolate */
+		if (value == segments[i].x)
+			return segments[i].y;
+		if (value > segments[i].x)
+			break;
+	}
+
+	/* Linear interpolation between the two (x,y) points */
+	dy = segments[i - 1].y - segments[i].y;
+	dx = segments[i - 1].x - segments[i].x;
+
+	tmp64 = value - segments[i].x;
+	tmp64 *= dy;
+	do_div(tmp64, dx);
+	ret = segments[i].y + tmp64;
+
+	return ret;
+}
+
+static u32 dib8000_get_time_us(struct dvb_frontend *fe, int layer)
+{
+	struct dib8000_state *state = fe->demodulator_priv;
+	struct dtv_frontend_properties *c = &state->fe[0]->dtv_property_cache;
+	int ini_layer, end_layer, i;
+	u64 time_us, tmp64;
+	u32 tmp, denom;
+	int guard, rate_num, rate_denum = 1, bits_per_symbol, nsegs;
+	int interleaving = 0, fft_div;
+
+	if (layer >= 0) {
+		ini_layer = layer;
+		end_layer = layer + 1;
+	} else {
+		ini_layer = 0;
+		end_layer = 3;
+	}
+
+	switch (c->guard_interval) {
+	case GUARD_INTERVAL_1_4:
+		guard = 4;
+		break;
+	case GUARD_INTERVAL_1_8:
+		guard = 8;
+		break;
+	case GUARD_INTERVAL_1_16:
+		guard = 16;
+		break;
+	default:
+	case GUARD_INTERVAL_1_32:
+		guard = 32;
+		break;
+	}
+
+	switch (c->transmission_mode) {
+	case TRANSMISSION_MODE_2K:
+		fft_div = 4;
+		break;
+	case TRANSMISSION_MODE_4K:
+		fft_div = 2;
+		break;
+	default:
+	case TRANSMISSION_MODE_8K:
+		fft_div = 1;
+		break;
+	}
+
+	denom = 0;
+	for (i = ini_layer; i < end_layer; i++) {
+		nsegs = c->layer[i].segment_count;
+		if (nsegs == 0 || nsegs > 13)
+			continue;
+
+		switch (c->layer[i].modulation) {
+		case DQPSK:
+		case QPSK:
+			bits_per_symbol = 2;
+			break;
+		case QAM_16:
+			bits_per_symbol = 4;
+			break;
+		default:
+		case QAM_64:
+			bits_per_symbol = 6;
+			break;
+		}
+
+		switch (c->layer[i].fec) {
+		case FEC_1_2:
+			rate_num = 1;
+			rate_denum = 2;
+			break;
+		case FEC_2_3:
+			rate_num = 2;
+			rate_denum = 3;
+			break;
+		case FEC_3_4:
+			rate_num = 3;
+			rate_denum = 4;
+			break;
+		case FEC_5_6:
+			rate_num = 5;
+			rate_denum = 6;
+			break;
+		default:
+		case FEC_7_8:
+			rate_num = 7;
+			rate_denum = 8;
+			break;
+		}
+
+		interleaving = c->layer[i].interleaving;
+
+		denom += bits_per_symbol * rate_num * fft_div * nsegs * 384;
+	}
+
+	/* If all goes wrong, wait for 1s for the next stats */
+	if (!denom)
+		return 0;
+
+	/* Estimate the period for the total bit rate */
+	time_us = rate_denum * (1008 * 1562500L);
+	tmp64 = time_us;
+	do_div(tmp64, guard);
+	time_us = time_us + tmp64;
+	time_us += denom / 2;
+	do_div(time_us, denom);
+
+	tmp = 1008 * 96 * interleaving;
+	time_us += tmp + tmp / guard;
+
+	return time_us;
+}
+
+static int dib8000_get_stats(struct dvb_frontend *fe, fe_status_t stat)
+{
+	struct dib8000_state *state = fe->demodulator_priv;
+	struct dtv_frontend_properties *c = &state->fe[0]->dtv_property_cache;
+	int i;
+	int show_per_stats = 0;
+	u32 time_us = 0, snr, val;
+	u64 blocks;
+	s32 db;
+	u16 strength;
+
+	/* Get Signal strength */
+	dib8000_read_signal_strength(fe, &strength);
+	val = strength;
+	db = interpolate_value(val,
+			       strength_to_db_table,
+			       ARRAY_SIZE(strength_to_db_table)) - 131000;
+	c->strength.stat[0].svalue = db;
+
+	/* UCB/BER/CNR measures require lock */
+	if (!(stat & FE_HAS_LOCK)) {
+		c->cnr.len = 1;
+		c->block_count.len = 1;
+		c->block_error.len = 1;
+		c->post_bit_error.len = 1;
+		c->post_bit_count.len = 1;
+		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+		return 0;
+	}
+
+	/* Check if time for stats was elapsed */
+	if (time_after(jiffies, state->per_jiffies_stats)) {
+		state->per_jiffies_stats = jiffies + msecs_to_jiffies(1000);
+
+		/* Get SNR */
+		snr = dib8000_get_snr(fe);
+		for (i = 1; i < MAX_NUMBER_OF_FRONTENDS; i++) {
+			if (state->fe[i])
+				snr += dib8000_get_snr(state->fe[i]);
+		}
+		snr = snr >> 16;
+
+		if (snr) {
+			snr = 10 * intlog10(snr);
+			snr = (1000L * snr) >> 24;
+		} else {
+			snr = 0;
+		}
+		c->cnr.stat[0].svalue = snr;
+		c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
+
+		/* Get UCB measures */
+		dib8000_read_unc_blocks(fe, &val);
+		if (val < state->init_ucb)
+			state->init_ucb += 0x100000000LL;
+
+		c->block_error.stat[0].scale = FE_SCALE_COUNTER;
+		c->block_error.stat[0].uvalue = val + state->init_ucb;
+
+		/* Estimate the number of packets based on bitrate */
+		if (!time_us)
+			time_us = dib8000_get_time_us(fe, -1);
+
+		if (time_us) {
+			blocks = 1250000ULL * 1000000ULL;
+			do_div(blocks, time_us * 8 * 204);
+			c->block_count.stat[0].scale = FE_SCALE_COUNTER;
+			c->block_count.stat[0].uvalue += blocks;
+		}
+
+		show_per_stats = 1;
+	}
+
+	/* Get post-BER measures */
+	if (time_after(jiffies, state->ber_jiffies_stats)) {
+		time_us = dib8000_get_time_us(fe, -1);
+		state->ber_jiffies_stats = jiffies + msecs_to_jiffies((time_us + 500) / 1000);
+
+		dprintk("Next all layers stats available in %u us.", time_us);
+
+		dib8000_read_ber(fe, &val);
+		c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
+		c->post_bit_error.stat[0].uvalue += val;
+
+		c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
+		c->post_bit_count.stat[0].uvalue += 100000000;
+	}
+
+	if (state->revision < 0x8002)
+		return 0;
+
+	c->block_error.len = 4;
+	c->post_bit_error.len = 4;
+	c->post_bit_count.len = 4;
+
+	for (i = 0; i < 3; i++) {
+		unsigned nsegs = c->layer[i].segment_count;
+
+		if (nsegs == 0 || nsegs > 13)
+			continue;
+
+		time_us = 0;
+
+		if (time_after(jiffies, state->ber_jiffies_stats_layer[i])) {
+			time_us = dib8000_get_time_us(fe, i);
+
+			state->ber_jiffies_stats_layer[i] = jiffies + msecs_to_jiffies((time_us + 500) / 1000);
+			dprintk("Next layer %c  stats will be available in %u us\n",
+				'A' + i, time_us);
+
+			val = dib8000_read_word(state, per_layer_regs[i].ber);
+			c->post_bit_error.stat[1 + i].scale = FE_SCALE_COUNTER;
+			c->post_bit_error.stat[1 + i].uvalue += val;
+
+			c->post_bit_count.stat[1 + i].scale = FE_SCALE_COUNTER;
+			c->post_bit_count.stat[1 + i].uvalue += 100000000;
+		}
+
+		if (show_per_stats) {
+			val = dib8000_read_word(state, per_layer_regs[i].per);
+
+			c->block_error.stat[1 + i].scale = FE_SCALE_COUNTER;
+			c->block_error.stat[1 + i].uvalue += val;
+
+			if (!time_us)
+				time_us = dib8000_get_time_us(fe, i);
+			if (time_us) {
+				blocks = 1250000ULL * 1000000ULL;
+				do_div(blocks, time_us * 8 * 204);
+				c->block_count.stat[0].scale = FE_SCALE_COUNTER;
+				c->block_count.stat[0].uvalue += blocks;
+			}
+		}
+	}
+	return 0;
+}
+
 int dib8000_set_slave_frontend(struct dvb_frontend *fe, struct dvb_frontend *fe_slave)
 {
 	struct dib8000_state *state = fe->demodulator_priv;