+/*---------------------------------------------------------------------*/
+
+static void tda8290_i2c_bridge(struct i2c_client *c, int close)
+{
+ unsigned char enable[2] = { 0x21, 0xC0 };
+ unsigned char disable[2] = { 0x21, 0x00 };
+ unsigned char *msg;
+ if(close) {
+ msg = enable;
+ i2c_master_send(c, msg, 2);
+ /* let the bridge stabilize */
+ msleep(20);
+ } else {
+ msg = disable;
+ i2c_master_send(c, msg, 2);
+ }
+}
+
+/*---------------------------------------------------------------------*/
+
+static int tda8290_tune(struct i2c_client *c, u16 ifc, unsigned int freq)
+{
+ struct tuner *t = i2c_get_clientdata(c);
+ unsigned char soft_reset[] = { 0x00, 0x00 };
+ unsigned char easy_mode[] = { 0x01, t->tda8290_easy_mode };
+ unsigned char expert_mode[] = { 0x01, 0x80 };
+ unsigned char agc_out_on[] = { 0x02, 0x00 };
+ unsigned char gainset_off[] = { 0x28, 0x14 };
+ unsigned char if_agc_spd[] = { 0x0f, 0x88 };
+ unsigned char adc_head_6[] = { 0x05, 0x04 };
+ unsigned char adc_head_9[] = { 0x05, 0x02 };
+ unsigned char adc_head_12[] = { 0x05, 0x01 };
+ unsigned char pll_bw_nom[] = { 0x0d, 0x47 };
+ unsigned char pll_bw_low[] = { 0x0d, 0x27 };
+ unsigned char gainset_2[] = { 0x28, 0x64 };
+ unsigned char agc_rst_on[] = { 0x0e, 0x0b };
+ unsigned char agc_rst_off[] = { 0x0e, 0x09 };
+ unsigned char if_agc_set[] = { 0x0f, 0x81 };
+ unsigned char addr_adc_sat = 0x1a;
+ unsigned char addr_agc_stat = 0x1d;
+ unsigned char addr_pll_stat = 0x1b;
+ unsigned char adc_sat, agc_stat,
+ pll_stat;
+
+ i2c_master_send(c, easy_mode, 2);
+ i2c_master_send(c, agc_out_on, 2);
+ i2c_master_send(c, soft_reset, 2);
+ msleep(1);
+
+ expert_mode[1] = t->tda8290_easy_mode + 0x80;
+ i2c_master_send(c, expert_mode, 2);
+ i2c_master_send(c, gainset_off, 2);
+ i2c_master_send(c, if_agc_spd, 2);
+ if (t->tda8290_easy_mode & 0x60)
+ i2c_master_send(c, adc_head_9, 2);
+ else
+ i2c_master_send(c, adc_head_6, 2);
+ i2c_master_send(c, pll_bw_nom, 2);
+
+ tda8290_i2c_bridge(c, 1);
+ if (t->tda827x_ver != 0)
+ tda827xa_tune(c, ifc, freq);
+ else
+ tda827x_tune(c, ifc, freq);
+ /* adjust headroom resp. gain */
+ i2c_master_send(c, &addr_adc_sat, 1);
+ i2c_master_recv(c, &adc_sat, 1);
+ i2c_master_send(c, &addr_agc_stat, 1);
+ i2c_master_recv(c, &agc_stat, 1);
+ i2c_master_send(c, &addr_pll_stat, 1);
+ i2c_master_recv(c, &pll_stat, 1);
+ if (pll_stat & 0x80)
+ tuner_dbg("tda8290 is locked, AGC: %d\n", agc_stat);
+ else
+ tuner_dbg("tda8290 not locked, no signal?\n");
+ if ((agc_stat > 115) || (!(pll_stat & 0x80) && (adc_sat < 20))) {
+ tuner_dbg("adjust gain, step 1. Agc: %d, ADC stat: %d, lock: %d\n",
+ agc_stat, adc_sat, pll_stat & 0x80);
+ i2c_master_send(c, gainset_2, 2);
+ msleep(100);
+ i2c_master_send(c, &addr_agc_stat, 1);
+ i2c_master_recv(c, &agc_stat, 1);
+ i2c_master_send(c, &addr_pll_stat, 1);
+ i2c_master_recv(c, &pll_stat, 1);
+ if ((agc_stat > 115) || !(pll_stat & 0x80)) {
+ tuner_dbg("adjust gain, step 2. Agc: %d, lock: %d\n",
+ agc_stat, pll_stat & 0x80);
+ if (t->tda827x_ver != 0)
+ tda827xa_agcf(c);
+ else
+ tda827x_agcf(c);
+ msleep(100);
+ i2c_master_send(c, &addr_agc_stat, 1);
+ i2c_master_recv(c, &agc_stat, 1);
+ i2c_master_send(c, &addr_pll_stat, 1);
+ i2c_master_recv(c, &pll_stat, 1);
+ if((agc_stat > 115) || !(pll_stat & 0x80)) {
+ tuner_dbg("adjust gain, step 3. Agc: %d\n", agc_stat);
+ i2c_master_send(c, adc_head_12, 2);
+ i2c_master_send(c, pll_bw_low, 2);
+ msleep(100);
+ }
+ }
+ }
+
+ /* l/ l' deadlock? */
+ if(t->tda8290_easy_mode & 0x60) {
+ i2c_master_send(c, &addr_adc_sat, 1);
+ i2c_master_recv(c, &adc_sat, 1);
+ i2c_master_send(c, &addr_pll_stat, 1);
+ i2c_master_recv(c, &pll_stat, 1);
+ if ((adc_sat > 20) || !(pll_stat & 0x80)) {
+ tuner_dbg("trying to resolve SECAM L deadlock\n");
+ i2c_master_send(c, agc_rst_on, 2);
+ msleep(40);
+ i2c_master_send(c, agc_rst_off, 2);
+ }
+ }
+
+ tda8290_i2c_bridge(c, 0);
+ i2c_master_send(c, if_agc_set, 2);
+ return 0;
+}
+
+/*---------------------------------------------------------------------*/