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Diffstat (limited to 'linux/drivers/media/dvb/frontends/stv0297.c')
-rw-r--r--linux/drivers/media/dvb/frontends/stv0297.c479
1 files changed, 479 insertions, 0 deletions
diff --git a/linux/drivers/media/dvb/frontends/stv0297.c b/linux/drivers/media/dvb/frontends/stv0297.c
new file mode 100644
index 000000000..4ef3adac5
--- /dev/null
+++ b/linux/drivers/media/dvb/frontends/stv0297.c
@@ -0,0 +1,479 @@
+/*
+ Driver for STV0297 demodulator
+
+ Copyright (C) 2003-2004 Dennis Noermann <dennis.noermann@noernet.de>
+
+ 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+
+#include "dvb_frontend.h"
+#include "stv0297.h"
+
+struct stv0297_state {
+
+ struct i2c_adapter* i2c;
+
+ struct dvb_frontend_ops ops;
+
+ const struct stv0297_config* config;
+
+ struct dvb_frontend frontend;
+};
+
+#if 0
+#define dprintk(x...) printk(x)
+#else
+#define dprintk(x...)
+#endif
+
+#define STV0297_CLOCK 28900
+
+static u8 init_tab [] = {
+ 0x80, 0x01, /* soft_reset */
+ 0x80, 0x00, /* cleared soft_reset */
+ 0x81, 0x01, /* deinterleaver descrambler reset */
+ 0x81, 0x00, /* cleared deinterleaver descrambler reset */
+ 0x83, 0x10, /* the Reed-Solomon block reset*/
+ 0x83, 0x00, /* cleared the Reed-Solomon block reset */
+ 0x84, 0x2b, /* clears the equalizer and also reinitializes the Reg. 00through 04. */
+ 0x84, 0x2a, /* cleares it .. */
+ 0x03, 0x00,
+ 0x25, 0x88,
+ 0x30, 0x97,
+ 0x31, 0x4C,
+ 0x32, 0xFF,
+ 0x33, 0x55,
+ 0x34, 0x00,
+ 0x35, 0x65,
+ 0x36, 0x80,
+ 0x40, 0x1C,
+ 0x42, 0x3C,
+ 0x43, 0x00,
+ 0x52, 0x28,
+ 0x5A, 0x1E,
+ 0x5B, 0x05,
+ 0x62, 0x06,
+ 0x6A, 0x02,
+ 0x70, 0xFF,
+ 0x71, 0x84,
+ 0x83, 0x10,
+ 0x84, 0x25,
+ 0x85, 0x00,
+ 0x86, 0x78,
+ 0x87, 0x73,
+ 0x88, 0x08,
+ 0x89, 0x00,
+ 0x90, 0x05,
+ 0xA0, 0x00,
+ 0xB0, 0x91,
+ 0xB1, 0x0B,
+ 0xC0, 0x4B,
+ 0xC1, 0x01,
+ 0xC2, 0x00,
+ 0xDE, 0x00,
+ 0xDF, 0x03,
+ 0x87, 0x73
+};
+
+
+static int stv0297_writereg (struct stv0297_state* state, u8 reg, u8 data)
+{
+ int ret;
+ u8 buf [] = { reg, data };
+ struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
+
+ ret = i2c_transfer (state->i2c, &msg, 1);
+
+ if (ret != 1)
+ dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, "
+ "ret == %i)\n", __FUNCTION__, reg, data, ret);
+
+ return (ret != 1) ? -1 : 0;
+}
+
+static int stv0297_writeregs (struct stv0297_state* state, u8 *data, int len)
+{
+ int ret;
+ struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = data, .len = len };
+
+ ret = i2c_transfer (state->i2c, &msg, 1);
+
+ if (ret != 1)
+ dprintk("%s: writeregs error\n ", __FUNCTION__);
+
+ return (ret != 1) ? -1 : 0;
+}
+
+static u8 stv0297_readreg (struct stv0297_state* state, u8 reg)
+{
+
+ int ret;
+ u8 b0[] = { reg };
+ u8 b1[] = { 0 };
+ struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
+ { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
+
+ ret = i2c_transfer (state->i2c, msg, 2);
+
+ if (ret != 2)
+ dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
+ __FUNCTION__, reg, ret);
+
+ return b1[0];
+}
+
+static int stv0297_readregs (struct stv0297_state* state, u8 reg1, u8 *b, u8 len)
+{
+ int ret;
+ struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = &reg1, .len = 1 },
+ { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
+
+ ret = i2c_transfer (state->i2c, msg, 2);
+
+ if (ret != 2)
+ dprintk("%s: readreg error (ret == %i)\n", __FUNCTION__, ret);
+
+ return ret == 2 ? 0 : ret;
+}
+
+static int stv0297_set_symbolrate (struct stv0297_state* state, u32 srate)
+{
+/*
+ Betanova sniff : 690000
+ stv0297_writereg (i2c, 0x55, 0x4E);
+ stv0297_writereg (i2c, 0x56, 0x00);
+ stv0297_writereg (i2c, 0x57, 0x1F);
+ stv0297_writereg (i2c, 0x58, 0x3D);
+*/
+ long tmp, ExtClk;
+
+ ExtClk = (long)(STV0297_CLOCK) / 4; /* 1/4 = 2^-2 */
+ tmp = 131072L * srate; /* 131072 = 2^17 */
+ tmp = tmp /ExtClk;
+ tmp = tmp * 8192L; /* 8192 = 2^13 */
+
+ stv0297_writereg (state, 0x55,(unsigned char)(tmp & 0xFF));
+ stv0297_writereg (state, 0x56,(unsigned char)(tmp>> 8));
+ stv0297_writereg (state, 0x57,(unsigned char)(tmp>>16));
+ stv0297_writereg (state, 0x58,(unsigned char)(tmp>>24));
+
+ return 0;
+}
+
+void stv0297_set_sweeprate(struct stv0297_state* state, short _FShift, long _SymbolRate)
+{
+ long long_tmp;
+ short FShift ;
+ unsigned char carrier;
+ int RegSymbolRate;
+
+ FShift = _FShift; /* in mS .. +/- 5,100 S von 6975 S */
+ RegSymbolRate = _SymbolRate; //RegGetSRate() ; /* in KHz */
+ if(RegSymbolRate <= 0) return ;
+
+ long_tmp = (long)FShift * 262144L ; // 262144 = 2*18
+ long_tmp /= RegSymbolRate ;
+ long_tmp *= 1024 ; // 1024 = 2*10
+
+ if(long_tmp >= 0)
+ long_tmp += 500000 ;
+ else long_tmp -= 500000 ;
+ long_tmp /= 1000000 ;
+
+ stv0297_writereg (state, 0x60,(unsigned char)(long_tmp & 0xFF));
+
+ carrier = stv0297_readreg(state, 0x69) & ~ 0xF0;
+ carrier |= (unsigned char)((long_tmp>>4) & 0xF0);
+ stv0297_writereg (state, 0x69, carrier);
+
+ return;
+}
+
+void stv0297_set_frequencyoffset(struct stv0297_state* state, long _CarrierOffset)
+{
+ long long_tmp;
+ unsigned char sweep;
+
+ long_tmp = _CarrierOffset * 26844L ; /* (2**28)/10000 */
+ if(long_tmp < 0) long_tmp += 0x10000000 ;
+ long_tmp &= 0x0FFFFFFF ;
+
+ stv0297_writereg (state,0x66,(unsigned char)(long_tmp & 0xFF)); // iphase0
+ stv0297_writereg (state,0x67,(unsigned char)(long_tmp>>8)); // iphase1
+ stv0297_writereg (state,0x68,(unsigned char)(long_tmp>>16)); // iphase2
+
+ sweep = stv0297_readreg(state,0x69) & 0xF0;
+ sweep |= ((unsigned char)(long_tmp>>24) & 0x0F);
+ stv0297_writereg (state,0x69,sweep);
+
+ return;
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+static int stv0297_init (struct dvb_frontend* fe)
+{
+ struct stv0297_state* state = (struct stv0297_state*) fe->demodulator_priv;
+ int i;
+
+ dprintk("stv0297: init chip\n");
+
+ for (i=0; i<sizeof(init_tab); i+=2) {
+ stv0297_writereg (state, init_tab[i], init_tab[i+1]);
+ }
+
+ return 0;
+}
+
+static int stv0297_read_status(struct dvb_frontend* fe, fe_status_t* status)
+{
+ struct stv0297_state* state = (struct stv0297_state*) fe->demodulator_priv;
+
+ u8 sync = stv0297_readreg (state, 0xDF);
+
+ *status = 0;
+ if (sync & 0x80)
+ *status |= FE_HAS_SYNC | FE_HAS_SIGNAL;
+ if (sync & 0x80)
+ *status |= FE_HAS_CARRIER;
+ if (sync & 0x80)
+ *status |= FE_HAS_VITERBI;
+ if (sync & 0x80)
+ *status |= FE_HAS_LOCK;
+ return 0;
+}
+
+static int stv0297_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+ struct stv0297_state* state = (struct stv0297_state*) fe->demodulator_priv;
+ u8 BER[3];
+
+ stv0297_writereg (state, 0xA0, 0x80); // Start Counting bit errors for 4096 Bytes
+ mdelay(25); // Hopefully got 4096 Bytes
+ stv0297_readregs (state, 0xA0, BER, 3);
+ mdelay(25);
+ *ber = (BER[2] << 8 | BER[1]) / ( 8 * 4096);
+
+ return 0;
+}
+
+
+static int stv0297_read_signal_strength(struct dvb_frontend* fe, u16* strength)
+{
+ struct stv0297_state* state = (struct stv0297_state*) fe->demodulator_priv;
+ u8 STRENGTH[2];
+
+ mdelay(25);
+ stv0297_readregs (state, 0x41, STRENGTH, 2);
+ *strength = (STRENGTH[1] & 0x03) << 8 | STRENGTH[0];
+
+ return 0;
+}
+
+static int stv0297_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+ struct stv0297_state* state = (struct stv0297_state*) fe->demodulator_priv;
+ u8 SNR[2];
+
+ mdelay(25);
+ stv0297_readregs (state, 0x07, SNR, 2);
+ *snr = SNR[1] << 8 | SNR[0];
+
+ return 0;
+}
+
+static int stv0297_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
+{
+ struct stv0297_state* state = (struct stv0297_state*) fe->demodulator_priv;
+
+ *ucblocks = (stv0297_readreg (state, 0xD5) << 8)
+ | stv0297_readreg (state, 0xD4);
+
+ return 0;
+}
+
+static int stv0297_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters * p)
+{
+ struct stv0297_state* state = (struct stv0297_state*) fe->demodulator_priv;
+ u8 buf2[] = { 0x83, 0x10, 0x25, 0x00, 0x78, 0x73 };
+ u8 buf3[] = { 0xC0, 0x4B, 0x01, 0x00 };
+ int CarrierOffset = -500;
+ int SweepRate = 1380;
+ int SpectrumInversion = 0;
+
+ if (SpectrumInversion) {
+ SweepRate = -SweepRate ;
+ CarrierOffset = -CarrierOffset ;
+ }
+ else {
+ SweepRate = SweepRate ;
+ CarrierOffset = CarrierOffset ;
+ }
+
+ stv0297_writereg(state, 0x86, 0xF8);
+ state->config->pll_set(fe, p);
+
+ stv0297_writeregs (state, buf2, sizeof(buf2));
+ stv0297_writereg (state, 0x84, 0x24);
+ stv0297_writeregs (state, buf3, sizeof(buf3));
+ stv0297_writereg (state, 0x88, 0x08);
+ stv0297_writereg (state, 0x90, 0x01);
+ stv0297_writereg (state, 0x37, 0x20);
+ stv0297_writereg (state, 0x40, 0x19);
+ stv0297_writereg (state, 0x43, 0x40);
+ stv0297_writereg (state, 0x41, 0xE4);
+ stv0297_writereg (state, 0x42, 0x3C);
+ stv0297_writereg (state, 0x44, 0xFF);
+ stv0297_writereg (state, 0x49, 0x04);
+ stv0297_writereg (state, 0x4A, 0xFF);
+ stv0297_writereg (state, 0x4B, 0xFF);
+ stv0297_writereg (state, 0x71, 0x04);
+ stv0297_writereg (state, 0x53, 0x08);
+ stv0297_writereg (state, 0x5A, 0x3E); //3E forces the direct path to be immediately
+ stv0297_writereg (state, 0x5B, 0x07);
+ stv0297_writereg (state, 0x5B, 0x05);
+
+ stv0297_set_symbolrate (state, p->u.qam.symbol_rate/1000);
+ stv0297_writereg (state, 0x59, 0x08);
+ stv0297_writereg (state, 0x61, 0x49);
+ stv0297_writereg (state, 0x62, 0x0E);
+ stv0297_writereg (state, 0x6A, 0x02);
+ stv0297_writereg (state, 0x00, 0x48); // set qam-64
+
+ stv0297_writereg (state, 0x01, 0x58);
+ stv0297_writereg (state, 0x82, 0x00);
+ stv0297_writereg (state, 0x83, 0x08);
+ stv0297_set_sweeprate(state,SweepRate, p->u.qam.symbol_rate/1000);
+ stv0297_writereg (state, 0x20, 0x00);
+ stv0297_writereg (state, 0x21, 0x40);
+ stv0297_set_frequencyoffset(state,CarrierOffset);
+
+ stv0297_writereg (state, 0x82, 0x00);
+ stv0297_writereg (state, 0x85, 0x04);
+ stv0297_writereg (state, 0x43, 0x10);
+ stv0297_writereg (state, 0x5A, 0x5E);
+
+ stv0297_writereg (state, 0x6A, 0x03);
+
+ stv0297_writereg (state, 0x85, 0x04);
+ stv0297_writereg (state, 0x6B, 0x00);
+ stv0297_writereg (state, 0x4A, 0xFF);
+ stv0297_writereg (state, 0x61, 0x49);
+ stv0297_writereg (state, 0x62, 0x0E);
+ stv0297_writereg (state, 0xDF, 0x02);
+ stv0297_writereg (state, 0xDF, 0x01);
+
+ stv0297_writereg (state, 0xDF, 0x02);
+ stv0297_writereg (state, 0xDF, 0x01);
+
+ stv0297_writereg (state, 0xDF, 0x02);
+ stv0297_writereg (state, 0xDF, 0x01);
+
+ return 0;
+}
+
+static void stv0297_release(struct dvb_frontend* fe)
+{
+ struct stv0297_state* state = (struct stv0297_state*) fe->demodulator_priv;
+ kfree(state);
+}
+
+static struct dvb_frontend_ops stv0297_ops;
+
+struct dvb_frontend* stv0297_attach(const struct stv0297_config* config,
+ struct i2c_adapter* i2c)
+{
+ struct stv0297_state* state = NULL;
+ int id;
+
+ /* allocate memory for the internal state */
+ state = (struct stv0297_state*) kmalloc(sizeof(struct stv0297_state), GFP_KERNEL);
+ if (state == NULL) goto error;
+
+ /* setup the state */
+ state->config = config;
+ state->i2c = i2c;
+ memcpy(&state->ops, &stv0297_ops, sizeof(struct dvb_frontend_ops));
+
+ /* check if the demod is there */
+ stv0297_writereg(state, 0x02, 0x34); /* standby off */
+ msleep(200);
+ id = stv0297_readreg(state, 0x00);
+
+ /* register 0x00 contains 0xa1 for STV0299 and STV0299B */
+ /* register 0x00 might contain 0x80 when returning from standby */
+ if (id != 0xa1 && id != 0x80) goto error;
+
+ /* create dvb_frontend */
+ state->frontend.ops = &state->ops;
+ state->frontend.demodulator_priv = state;
+ return &state->frontend;
+
+error:
+ if (state) kfree(state);
+ return NULL;
+}
+
+static struct dvb_frontend_ops stv0297_ops = {
+
+ .info = {
+ .name = "ST STV0297 DVB-C",
+ .type = FE_QAM,
+ .frequency_min = 64000000,
+ .frequency_max = 1300000000,
+ .frequency_stepsize = 62500,
+ .symbol_rate_min = 870000,
+ .symbol_rate_max = 11700000,
+ .caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
+ FE_CAN_QAM_128 | FE_CAN_QAM_256 |
+ FE_CAN_FEC_AUTO | FE_CAN_INVERSION_AUTO |
+ FE_CAN_RECOVER
+ },
+
+ .release = stv0297_release,
+
+ .init = stv0297_init,
+
+ .set_frontend = stv0297_set_frontend,
+
+ .read_status = stv0297_read_status,
+ .read_ber = stv0297_read_ber,
+ .read_signal_strength = stv0297_read_signal_strength,
+ .read_snr = stv0297_read_snr,
+ .read_ucblocks = stv0297_read_ucblocks,
+};
+
+MODULE_DESCRIPTION("ST STV0297 DVB-C Demodulator driver");
+MODULE_AUTHOR("Dennis Noermann");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(stv0297_attach);
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