--- /dev/null
+/*
+ TDA10021 - Single Chip Cable Channel Receiver driver module
+ used on the the Siemens DVB-C cards
+
+ Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
+ Copyright (C) 2004 Markus Schulz <msc@antzsystem.de>
+ Suppport for TDA10021
+
+ 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/config.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+
+#include "dvb_frontend.h"
+#include "tda10021.h"
+
+
+struct tda10021_state {
+
+ struct i2c_adapter* i2c;
+
+ struct dvb_frontend_ops ops;
+
+ /* configuration settings */
+ const struct tda10021_config* config;
+
+ struct dvb_frontend frontend;
+
+ u8 pwm;
+ u8 reg0;
+};
+
+
+#if 0
+#define dprintk(x...) printk(x)
+#else
+#define dprintk(x...)
+#endif
+
+static int verbose;
+
+#define XIN 57840000UL
+#define DISABLE_INVERSION(reg0) do { reg0 |= 0x20; } while (0)
+#define ENABLE_INVERSION(reg0) do { reg0 &= ~0x20; } while (0)
+#define HAS_INVERSION(reg0) (!(reg0 & 0x20))
+
+#define FIN (XIN >> 4)
+
+int tda10021_inittab_size = 0x40;
+static u8 tda10021_inittab[0x40]=
+{
+ 0x73, 0x6a, 0x23, 0x0a, 0x02, 0x37, 0x77, 0x1a,
+ 0x37, 0x6a, 0x17, 0x8a, 0x1e, 0x86, 0x43, 0x40,
+ 0xb8, 0x3f, 0xa1, 0x00, 0xcd, 0x01, 0x00, 0xff,
+ 0x11, 0x00, 0x7c, 0x31, 0x30, 0x20, 0x00, 0x00,
+ 0x02, 0x00, 0x00, 0x7d, 0x00, 0x00, 0x00, 0x00,
+ 0x07, 0x00, 0x33, 0x11, 0x0d, 0x95, 0x08, 0x58,
+ 0x00, 0x00, 0x80, 0x00, 0x80, 0xff, 0x00, 0x00,
+ 0x04, 0x2d, 0x2f, 0xff, 0x00, 0x00, 0x00, 0x00,
+};
+
+static int tda10021_writereg (struct tda10021_state* state, u8 reg, u8 data)
+{
+ u8 buf[] = { reg, data };
+ struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
+ int ret;
+
+ ret = i2c_transfer (state->i2c, &msg, 1);
+ if (ret != 1)
+ printk("DVB: TDA10021(%d): %s, writereg error "
+ "(reg == 0x%02x, val == 0x%02x, ret == %i)\n",
+ state->frontend.dvb->num, __FUNCTION__, reg, data, ret);
+
+ msleep(10);
+ return (ret != 1) ? -EREMOTEIO : 0;
+}
+
+
+static u8 tda10021_readreg (struct tda10021_state* state, u8 reg)
+{
+ 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 } };
+ int ret;
+
+ ret = i2c_transfer (state->i2c, msg, 2);
+ if (ret != 2)
+ printk("DVB: TDA10021(%d): %s: readreg error (ret == %i)\n",
+ state->frontend.dvb->num, __FUNCTION__, ret);
+ return b1[0];
+}
+
+//get access to tuner
+static int lock_tuner(struct tda10021_state* state)
+{
+ u8 buf[2] = { 0x0f, tda10021_inittab[0x0f] | 0x80 };
+ struct i2c_msg msg = {.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
+
+ if(i2c_transfer(state->i2c, &msg, 1) != 1)
+ {
+ printk("tda10021: lock tuner fails\n");
+ return -EREMOTEIO;
+ }
+ return 0;
+}
+
+//release access from tuner
+static int unlock_tuner(struct tda10021_state* state)
+{
+ u8 buf[2] = { 0x0f, tda10021_inittab[0x0f] & 0x7f };
+ struct i2c_msg msg_post={.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
+
+ if(i2c_transfer(state->i2c, &msg_post, 1) != 1)
+ {
+ printk("tda10021: unlock tuner fails\n");
+ return -EREMOTEIO;
+ }
+ return 0;
+}
+
+static int tda10021_setup_reg0 (struct tda10021_state* state, u8 reg0,
+ fe_spectral_inversion_t inversion)
+{
+ reg0 |= state->reg0 & 0x63;
+
+ if (INVERSION_ON == inversion)
+ ENABLE_INVERSION(reg0);
+ else if (INVERSION_OFF == inversion)
+ DISABLE_INVERSION(reg0);
+
+ tda10021_writereg (state, 0x00, reg0 & 0xfe);
+ tda10021_writereg (state, 0x00, reg0 | 0x01);
+
+ state->reg0 = reg0;
+ return 0;
+}
+
+static int tda10021_set_symbolrate (struct tda10021_state* state, u32 symbolrate)
+{
+ s32 BDR;
+ s32 BDRI;
+ s16 SFIL=0;
+ u16 NDEC = 0;
+ u32 tmp, ratio;
+
+ if (symbolrate > XIN/2)
+ symbolrate = XIN/2;
+ if (symbolrate < 500000)
+ symbolrate = 500000;
+
+ if (symbolrate < XIN/16) NDEC = 1;
+ if (symbolrate < XIN/32) NDEC = 2;
+ if (symbolrate < XIN/64) NDEC = 3;
+
+ if (symbolrate < (u32)(XIN/12.3)) SFIL = 1;
+ if (symbolrate < (u32)(XIN/16)) SFIL = 0;
+ if (symbolrate < (u32)(XIN/24.6)) SFIL = 1;
+ if (symbolrate < (u32)(XIN/32)) SFIL = 0;
+ if (symbolrate < (u32)(XIN/49.2)) SFIL = 1;
+ if (symbolrate < (u32)(XIN/64)) SFIL = 0;
+ if (symbolrate < (u32)(XIN/98.4)) SFIL = 1;
+
+ symbolrate <<= NDEC;
+ ratio = (symbolrate << 4) / FIN;
+ tmp = ((symbolrate << 4) % FIN) << 8;
+ ratio = (ratio << 8) + tmp / FIN;
+ tmp = (tmp % FIN) << 8;
+ ratio = (ratio << 8) + (tmp + FIN/2) / FIN;
+
+ BDR = ratio;
+ BDRI = (((XIN << 5) / symbolrate) + 1) / 2;
+
+ if (BDRI > 0xFF)
+ BDRI = 0xFF;
+
+ SFIL = (SFIL << 4) | tda10021_inittab[0x0E];
+
+ NDEC = (NDEC << 6) | tda10021_inittab[0x03];
+
+ tda10021_writereg (state, 0x03, NDEC);
+ tda10021_writereg (state, 0x0a, BDR&0xff);
+ tda10021_writereg (state, 0x0b, (BDR>> 8)&0xff);
+ tda10021_writereg (state, 0x0c, (BDR>>16)&0x3f);
+
+ tda10021_writereg (state, 0x0d, BDRI);
+ tda10021_writereg (state, 0x0e, SFIL);
+
+ return 0;
+}
+
+
+
+
+
+
+
+
+
+
+static int tda10021_init (struct dvb_frontend *fe)
+{
+ struct tda10021_state* state = (struct tda10021_state*) fe->demodulator_priv;
+ int i;
+
+ dprintk("DVB: TDA10021(%d): init chip\n", fe->adapter->num);
+
+ //tda10021_writereg (fe, 0, 0);
+
+ for (i=0; i<tda10021_inittab_size; i++)
+ tda10021_writereg (state, i, tda10021_inittab[i]);
+
+ tda10021_writereg (state, 0x34, state->pwm);
+
+ //Comment by markus
+ //0x2A[3-0] == PDIV -> P multiplaying factor (P=PDIV+1)(default 0)
+ //0x2A[4] == BYPPLL -> Power down mode (default 1)
+ //0x2A[5] == LCK -> PLL Lock Flag
+ //0x2A[6] == POLAXIN -> Polarity of the input reference clock (default 0)
+
+ //Activate PLL
+ tda10021_writereg(state, 0x2a, tda10021_inittab[0x2a] & 0xef);
+
+ if (state->config->pll_init) {
+ lock_tuner(state);
+ state->config->pll_init(fe);
+ unlock_tuner(state);
+ }
+
+ return 0;
+}
+
+static int tda10021_set_parameters (struct dvb_frontend *fe,
+ struct dvb_frontend_parameters *p)
+{
+ struct tda10021_state* state = (struct tda10021_state*) fe->demodulator_priv;
+
+ //table for QAM4-QAM256 ready QAM4 QAM16 QAM32 QAM64 QAM128 QAM256
+ //CONF
+ static const u8 reg0x00 [] = { 0x14, 0x00, 0x04, 0x08, 0x0c, 0x10 };
+ //AGCREF value
+ static const u8 reg0x01 [] = { 0x78, 0x8c, 0x8c, 0x6a, 0x78, 0x5c };
+ //LTHR value
+ static const u8 reg0x05 [] = { 0x78, 0x87, 0x64, 0x46, 0x36, 0x26 };
+ //MSETH
+ static const u8 reg0x08 [] = { 0x8c, 0xa2, 0x74, 0x43, 0x34, 0x23 };
+ //AREF
+ static const u8 reg0x09 [] = { 0x96, 0x91, 0x96, 0x6a, 0x7e, 0x6b };
+
+ int qam = p->u.qam.modulation;
+
+ if (qam < 0 || qam > 5)
+ return -EINVAL;
+
+ //printk("tda10021: set frequency to %d qam=%d symrate=%d\n", p->frequency,qam,p->u.qam.symbol_rate);
+
+ lock_tuner(state);
+ state->config->pll_set(fe, p);
+ unlock_tuner(state);
+
+ tda10021_set_symbolrate (state, p->u.qam.symbol_rate);
+ tda10021_writereg (state, 0x34, state->pwm);
+
+ tda10021_writereg (state, 0x01, reg0x01[qam]);
+ tda10021_writereg (state, 0x05, reg0x05[qam]);
+ tda10021_writereg (state, 0x08, reg0x08[qam]);
+ tda10021_writereg (state, 0x09, reg0x09[qam]);
+
+ tda10021_setup_reg0 (state, reg0x00[qam], p->inversion);
+
+ return 0;
+}
+
+static int tda10021_read_status(struct dvb_frontend* fe, fe_status_t* status)
+{
+ struct tda10021_state* state = (struct tda10021_state*) fe->demodulator_priv;
+ int sync;
+
+ *status = 0;
+ //0x11[0] == EQALGO -> Equalizer algorithms state
+ //0x11[1] == CARLOCK -> Carrier locked
+ //0x11[2] == FSYNC -> Frame synchronisation
+ //0x11[3] == FEL -> Front End locked
+ //0x11[6] == NODVB -> DVB Mode Information
+ sync = tda10021_readreg (state, 0x11);
+
+ if (sync & 2)
+ *status |= FE_HAS_SIGNAL|FE_HAS_CARRIER;
+
+ if (sync & 4)
+ *status |= FE_HAS_SYNC|FE_HAS_VITERBI;
+
+ if (sync & 8)
+ *status |= FE_HAS_LOCK;
+
+ return 0;
+}
+
+static int tda10021_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+ struct tda10021_state* state = (struct tda10021_state*) fe->demodulator_priv;
+
+ u32 _ber = tda10021_readreg(state, 0x14) |
+ (tda10021_readreg(state, 0x15) << 8) |
+ ((tda10021_readreg(state, 0x16) & 0x0f) << 16);
+ *ber = 10 * _ber;
+
+ return 0;
+}
+
+static int tda10021_read_signal_strength(struct dvb_frontend* fe, u16* strength)
+{
+ struct tda10021_state* state = (struct tda10021_state*) fe->demodulator_priv;
+
+ u8 gain = tda10021_readreg(state, 0x17);
+ *strength = (gain << 8) | gain;
+
+ return 0;
+}
+
+static int tda10021_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+ struct tda10021_state* state = (struct tda10021_state*) fe->demodulator_priv;
+
+ u8 quality = ~tda10021_readreg(state, 0x18);
+ *snr = (quality << 8) | quality;
+
+ return 0;
+}
+
+static int tda10021_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
+{
+ struct tda10021_state* state = (struct tda10021_state*) fe->demodulator_priv;
+
+ *ucblocks = tda10021_readreg (state, 0x13) & 0x7f;
+ if (*ucblocks == 0x7f)
+ *ucblocks = 0xffffffff;
+
+ /* reset uncorrected block counter */
+ tda10021_writereg (state, 0x10, tda10021_inittab[0x10] & 0xdf);
+ tda10021_writereg (state, 0x10, tda10021_inittab[0x10]);
+
+ return 0;
+}
+
+static int tda10021_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
+{
+ struct tda10021_state* state = (struct tda10021_state*) fe->demodulator_priv;
+ int sync;
+ s8 afc = 0;
+
+ sync = tda10021_readreg(state, 0x11);
+ afc = tda10021_readreg(state, 0x19);
+ if (verbose) {
+ /* AFC only valid when carrier has been recovered */
+ printk(sync & 2 ? "DVB: TDA10021(%d): AFC (%d) %dHz\n" :
+ "DVB: TDA10021(%d): [AFC (%d) %dHz]\n",
+ state->frontend.dvb->num, afc,
+ -((s32)p->u.qam.symbol_rate * afc) >> 10);
+ }
+
+ p->inversion = HAS_INVERSION(state->reg0) ? INVERSION_ON : INVERSION_OFF;
+ p->u.qam.modulation = ((state->reg0 >> 2) & 7) + QAM_16;
+
+ p->u.qam.fec_inner = FEC_NONE;
+ p->frequency = ((p->frequency + 31250) / 62500) * 62500;
+
+ if (sync & 2)
+ p->frequency -= ((s32)p->u.qam.symbol_rate * afc) >> 10;
+
+ return 0;
+}
+
+static int tda10021_sleep(struct dvb_frontend* fe)
+{
+ struct tda10021_state* state = (struct tda10021_state*) fe->demodulator_priv;
+
+ tda10021_writereg (state, 0x1b, 0x02); /* pdown ADC */
+ tda10021_writereg (state, 0x00, 0x80); /* standby */
+
+ return 0;
+}
+
+static void tda10021_release(struct dvb_frontend* fe)
+{
+ struct tda10021_state* state = (struct tda10021_state*) fe->demodulator_priv;
+ kfree(state);
+}
+
+static struct dvb_frontend_ops tda10021_ops;
+
+struct dvb_frontend* tda10021_attach(const struct tda10021_config* config,
+ struct i2c_adapter* i2c,
+ u8 pwm)
+{
+ struct tda10021_state* state = NULL;
+
+ /* allocate memory for the internal state */
+ state = (struct tda10021_state*) kmalloc(sizeof(struct tda10021_state), GFP_KERNEL);
+ if (state == NULL) goto error;
+
+ /* setup the state */
+ state->config = config;
+ state->i2c = i2c;
+ memcpy(&state->ops, &tda10021_ops, sizeof(struct dvb_frontend_ops));
+ state->pwm = pwm;
+ state->reg0 = tda10021_inittab[0];
+
+ /* check if the demod is there */
+ if ((tda10021_readreg(state, 0x1a) & 0xf0) != 0x70) 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 tda10021_ops = {
+
+ .info = {
+ .name = "Philips TDA10021 DVB-C",
+ .type = FE_QAM,
+ .frequency_stepsize = 62500,
+ .frequency_min = 51000000,
+ .frequency_max = 858000000,
+ .symbol_rate_min = (XIN/2)/64, /* SACLK/64 == (XIN/2)/64 */
+ .symbol_rate_max = (XIN/2)/4, /* SACLK/4 */
+ #if 0
+ .frequency_tolerance = ???,
+ .symbol_rate_tolerance = ???, /* ppm */ /* == 8% (spec p. 5) */
+ #endif
+ .caps = 0x400 | //FE_CAN_QAM_4
+ FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
+ FE_CAN_QAM_128 | FE_CAN_QAM_256 |
+ FE_CAN_FEC_AUTO
+ },
+
+ .release = tda10021_release,
+
+ .init = tda10021_init,
+ .sleep = tda10021_sleep,
+
+ .set_frontend = tda10021_set_parameters,
+ .get_frontend = tda10021_get_frontend,
+
+ .read_status = tda10021_read_status,
+ .read_ber = tda10021_read_ber,
+ .read_signal_strength = tda10021_read_signal_strength,
+ .read_snr = tda10021_read_snr,
+ .read_ucblocks = tda10021_read_ucblocks,
+};
+
+module_param(verbose, int, 0644);
+MODULE_PARM_DESC(verbose, "print AFC offset after tuning for debugging the PWM setting");
+
+MODULE_DESCRIPTION("Philips TDA10021 DVB-C demodulator driver");
+MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Markus Schulz");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(tda10021_attach);
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