V4L/DVB (11854): TDA10048: Ensure the I/F changes during DVB-T 6/7/8 bandwidth changes.

TDA10048: Ensure the I/F changes during DVB-T 6/7/8 bandwidth changes.

Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 123 insertions, 61 deletions

diff --git a/drivers/media/dvb/frontends/tda10048.c b/drivers/media/dvb/frontends/tda10048.c
index 11be4697cb3d..6707832bdcab 100644
--- a/drivers/media/dvb/frontends/tda10048.c
+++ b/drivers/media/dvb/frontends/tda10048.c
@@ -1,7 +1,7 @@
 /*
     NXP TDA10048HN DVB OFDM demodulator driver
 
-    Copyright (C) 2008 Steven Toth <stoth@linuxtv.org>
+    Copyright (C) 2009 Steven Toth <stoth@kernellabs.com>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -139,8 +139,8 @@ struct tda10048_state {
 
         struct i2c_adapter *i2c;
 
-        /* configuration settings */
-        const struct tda10048_config *config;
+        /* We'll cache and update the attach config settings */
+        struct tda10048_config config;
         struct dvb_frontend frontend;
 
         int fwloaded;
@@ -202,12 +202,24 @@ static struct init_tab {
         { TDA10048_CONF_C4_2, 0x04 },
 };
 
+static struct pll_tab {
+        u32     clk_freq_khz;
+        u32     if_freq_khz;
+        u8      m, n, p;
+} pll_tab[] = {
+        { TDA10048_CLK_4000,  TDA10048_IF_36130, 10, 0, 0 },
+        { TDA10048_CLK_16000, TDA10048_IF_4300,  10, 3, 0 },
+        { TDA10048_CLK_16000, TDA10048_IF_4000,  10, 3, 0 },
+        { TDA10048_CLK_16000, TDA10048_IF_36130, 10, 3, 0 },
+};
+
 static int tda10048_writereg(struct tda10048_state *state, u8 reg, u8 data)
 {
+        struct tda10048_config *config = &state->config;
         int ret;
         u8 buf[] = { reg, data };
         struct i2c_msg msg = {
-                .addr = state->config->demod_address,
+                .addr = config->demod_address,
                 .flags = 0, .buf = buf, .len = 2 };
 
         dprintk(2, "%s(reg = 0x%02x, data = 0x%02x)\n", __func__, reg, data);
@@ -222,13 +234,14 @@ static int tda10048_writereg(struct tda10048_state *state, u8 reg, u8 data)
 
 static u8 tda10048_readreg(struct tda10048_state *state, u8 reg)
 {
+        struct tda10048_config *config = &state->config;
         int ret;
         u8 b0[] = { reg };
         u8 b1[] = { 0 };
         struct i2c_msg msg[] = {
-                { .addr = state->config->demod_address,
+                { .addr = config->demod_address,
                         .flags = 0, .buf = b0, .len = 1 },
-                { .addr = state->config->demod_address,
+                { .addr = config->demod_address,
                         .flags = I2C_M_RD, .buf = b1, .len = 1 } };
 
         dprintk(2, "%s(reg = 0x%02x)\n", __func__, reg);
@@ -245,6 +258,7 @@ static u8 tda10048_readreg(struct tda10048_state *state, u8 reg)
 static int tda10048_writeregbulk(struct tda10048_state *state, u8 reg,
                                  const u8 *data, u16 len)
 {
+        struct tda10048_config *config = &state->config;
         int ret = -EREMOTEIO;
         struct i2c_msg msg;
         u8 *buf;
@@ -260,7 +274,7 @@ static int tda10048_writeregbulk(struct tda10048_state *state, u8 reg,
         *buf = reg;
         memcpy(buf + 1, data, len);
 
-        msg.addr = state->config->demod_address;
+        msg.addr = config->demod_address;
         msg.flags = 0;
         msg.buf = buf;
         msg.len = len + 1;
@@ -411,47 +425,47 @@ static int tda10048_set_bandwidth(struct dvb_frontend *fe,
         return 0;
 }
 
-static int tda10048_set_pll(struct dvb_frontend *fe)
+static int tda10048_set_if(struct dvb_frontend *fe, enum fe_bandwidth bw)
 {
         struct tda10048_state *state = fe->demodulator_priv;
-        int ret = 0;
+        struct tda10048_config *config = &state->config;
+        int i;
+        u32 if_freq_khz;
 
-        dprintk(1, "%s()\n", __func__);
+        dprintk(1, "%s(bw = %d)\n", __func__, bw);
 
-        if ((state->config->clk_freq_khz == TDA10048_CLK_4000) &&
-                (state->config->if_freq_khz == TDA10048_IF_36130)) {
-                state->freq_if_hz = TDA10048_IF_36130 * 1000;
-                state->xtal_hz = TDA10048_CLK_4000 * 1000;
-                state->pll_mfactor = 10;
-                state->pll_nfactor = 0;
-                state->pll_pfactor = 0;
-        } else
-        if ((state->config->clk_freq_khz == TDA10048_CLK_16000) &&
-                (state->config->if_freq_khz == TDA10048_IF_4300)) {
-                state->freq_if_hz = TDA10048_IF_4300 * 1000;
-                state->xtal_hz = TDA10048_CLK_16000 * 1000;
-                state->pll_mfactor = 10;
-                state->pll_nfactor = 3;
-                state->pll_pfactor = 0;
-        } else
-        if ((state->config->clk_freq_khz == TDA10048_CLK_16000) &&
-                (state->config->if_freq_khz == TDA10048_IF_4000)) {
-                state->freq_if_hz = TDA10048_IF_4000 * 1000;
-                state->xtal_hz = TDA10048_CLK_16000 * 1000;
-                state->pll_mfactor = 10;
-                state->pll_nfactor = 3;
-                state->pll_pfactor = 0;
-        } else
-        if ((state->config->clk_freq_khz == TDA10048_CLK_16000) &&
-                (state->config->if_freq_khz == TDA10048_IF_36130)) {
-                state->freq_if_hz = TDA10048_IF_36130 * 1000;
-                state->xtal_hz = TDA10048_CLK_16000 * 1000;
-                state->pll_mfactor = 10;
-                state->pll_nfactor = 3;
-                state->pll_pfactor = 0;
-        } else {
-                printk(KERN_ERR "%s() Incorrect attach settings\n", __func__);
-                ret = -EINVAL;
+        /* based on target bandwidth and clk we calculate pll factors */
+        switch (bw) {
+        case BANDWIDTH_6_MHZ:
+                if_freq_khz = config->dtv6_if_freq_khz;
+                break;
+        case BANDWIDTH_7_MHZ:
+                if_freq_khz = config->dtv7_if_freq_khz;
+                break;
+        case BANDWIDTH_8_MHZ:
+                if_freq_khz = config->dtv8_if_freq_khz;
+                break;
+        default:
+                printk(KERN_ERR "%s() no default\n", __func__);
+                return -EINVAL;
+        }
+
+        for (i = 0; i < ARRAY_SIZE(pll_tab); i++) {
+                if ((pll_tab[i].clk_freq_khz == config->clk_freq_khz) &&
+                        (pll_tab[i].if_freq_khz == if_freq_khz)) {
+
+                        state->freq_if_hz = pll_tab[i].if_freq_khz * 1000;
+                        state->xtal_hz = pll_tab[i].clk_freq_khz * 1000;
+                        state->pll_mfactor = pll_tab[i].m;
+                        state->pll_nfactor = pll_tab[i].n;
+                        state->pll_pfactor = pll_tab[i].p;
+                        break;
+                }
+        }
+        if (i == ARRAY_SIZE(pll_tab)) {
+                printk(KERN_ERR "%s() Incorrect attach settings\n",
+                        __func__);
+                return -EINVAL;
         }
 
         dprintk(1, "- freq_if_hz = %d\n", state->freq_if_hz);
@@ -466,22 +480,21 @@ static int tda10048_set_pll(struct dvb_frontend *fe)
         state->sample_freq /= (state->pll_pfactor + 4);
         dprintk(1, "- sample_freq = %d\n", state->sample_freq);
 
-        tda10048_set_phy2(fe, state->sample_freq,
-                state->config->if_freq_khz * 1000);
-        tda10048_set_wref(fe, state->sample_freq, state->bandwidth);
-        tda10048_set_invwref(fe, state->sample_freq, state->bandwidth);
+        /* Update the I/F */
+        tda10048_set_phy2(fe, state->sample_freq, state->freq_if_hz);
 
-        return ret;
+        return 0;
 }
 
 static int tda10048_firmware_upload(struct dvb_frontend *fe)
 {
         struct tda10048_state *state = fe->demodulator_priv;
+        struct tda10048_config *config = &state->config;
         const struct firmware *fw;
         int ret;
         int pos = 0;
         int cnt;
-        u8 wlen = state->config->fwbulkwritelen;
+        u8 wlen = config->fwbulkwritelen;
 
         if ((wlen != TDA10048_BULKWRITE_200) && (wlen != TDA10048_BULKWRITE_50))
                 wlen = TDA10048_BULKWRITE_200;
@@ -687,9 +700,10 @@ static int tda10048_get_tps(struct tda10048_state *state,
 static int tda10048_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 {
         struct tda10048_state *state = fe->demodulator_priv;
+        struct tda10048_config *config = &state->config;
         dprintk(1, "%s(%d)\n", __func__, enable);
 
-        if (state->config->disable_gate_access)
+        if (config->disable_gate_access)
                 return 0;
 
         if (enable)
@@ -729,8 +743,11 @@ static int tda10048_set_frontend(struct dvb_frontend *fe,
 
         dprintk(1, "%s(frequency=%d)\n", __func__, p->frequency);
 
-        if (p->u.ofdm.bandwidth != state->bandwidth)
+        /* Update the I/F pll's if the bandwidth changes */
+        if (p->u.ofdm.bandwidth != state->bandwidth) {
+                tda10048_set_if(fe, p->u.ofdm.bandwidth);
                 tda10048_set_bandwidth(fe, p->u.ofdm.bandwidth);
+        }
 
         if (fe->ops.tuner_ops.set_params) {
 
@@ -753,6 +770,7 @@ static int tda10048_set_frontend(struct dvb_frontend *fe,
 static int tda10048_init(struct dvb_frontend *fe)
 {
         struct tda10048_state *state = fe->demodulator_priv;
+        struct tda10048_config *config = &state->config;
         int ret = 0, i;
 
         dprintk(1, "%s()\n", __func__);
@@ -765,15 +783,13 @@ static int tda10048_init(struct dvb_frontend *fe)
                 ret = tda10048_firmware_upload(fe);
 
         /* Set either serial or parallel */
-        tda10048_output_mode(fe, state->config->output_mode);
+        tda10048_output_mode(fe, config->output_mode);
 
         /* Set inversion */
-        tda10048_set_inversion(fe, state->config->inversion);
+        tda10048_set_inversion(fe, config->inversion);
 
-        /* Establish default PLL values */
-        tda10048_set_pll(fe);
-
-        /* Establish default bandwidth */
+        /* Establish default RF values */
+        tda10048_set_if(fe, BANDWIDTH_8_MHZ);
         tda10048_set_bandwidth(fe, BANDWIDTH_8_MHZ);
 
         /* Ensure we leave the gate closed */
@@ -1027,6 +1043,45 @@ static void tda10048_release(struct dvb_frontend *fe)
         kfree(state);
 }
 
+static void tda10048_establish_defaults(struct dvb_frontend *fe)
+{
+        struct tda10048_state *state = fe->demodulator_priv;
+        struct tda10048_config *config = &state->config;
+
+        /* Validate/default the config */
+        if (config->dtv6_if_freq_khz == 0) {
+                config->dtv6_if_freq_khz = TDA10048_IF_4300;
+                printk(KERN_WARNING "%s() tda10048_config.dtv6_if_freq_khz "
+                        "is not set (defaulting to %d)\n",
+                        __func__,
+                        config->dtv6_if_freq_khz);
+        }
+
+        if (config->dtv7_if_freq_khz == 0) {
+                config->dtv7_if_freq_khz = TDA10048_IF_4300;
+                printk(KERN_WARNING "%s() tda10048_config.dtv7_if_freq_khz "
+                        "is not set (defaulting to %d)\n",
+                        __func__,
+                        config->dtv7_if_freq_khz);
+        }
+
+        if (config->dtv8_if_freq_khz == 0) {
+                config->dtv8_if_freq_khz = TDA10048_IF_4300;
+                printk(KERN_WARNING "%s() tda10048_config.dtv8_if_freq_khz "
+                        "is not set (defaulting to %d)\n",
+                        __func__,
+                        config->dtv8_if_freq_khz);
+        }
+
+        if (config->clk_freq_khz == 0) {
+                config->clk_freq_khz = TDA10048_CLK_16000;
+                printk(KERN_WARNING "%s() tda10048_config.clk_freq_khz "
+                        "is not set (defaulting to %d)\n",
+                        __func__,
+                        config->clk_freq_khz);
+        }
+}
+
 static struct dvb_frontend_ops tda10048_ops;
 
 struct dvb_frontend *tda10048_attach(const struct tda10048_config *config,
@@ -1041,8 +1096,8 @@ struct dvb_frontend *tda10048_attach(const struct tda10048_config *config,
         if (state == NULL)
                 goto error;
 
-        /* setup the state */
-        state->config = config;
+        /* setup the state and clone the config */
+        memcpy(&state->config, config, sizeof(*config));
         state->i2c = i2c;
         state->fwloaded = 0;
         state->bandwidth = BANDWIDTH_8_MHZ;
@@ -1056,8 +1111,15 @@ struct dvb_frontend *tda10048_attach(const struct tda10048_config *config,
                 sizeof(struct dvb_frontend_ops));
         state->frontend.demodulator_priv = state;
 
+        /* Establish any defaults the the user didn't pass */
+        tda10048_establish_defaults(&state->frontend);
+
         /* Set the xtal and freq defaults */
-        if (tda10048_set_pll(&state->frontend) != 0)
+        if (tda10048_set_if(&state->frontend, BANDWIDTH_8_MHZ) != 0)
+                goto error;
+
+        /* Default bandwidth */
+        if (tda10048_set_bandwidth(&state->frontend, BANDWIDTH_8_MHZ) != 0)
                 goto error;
 
         /* Leave the gate closed */