--- /dev/null
+/*
+ TDA10021 - Single Chip Cable Channel Receiver driver module
+ used on the Siemens DVB-C cards
+
+ Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
+ Copyright (C) 2004 Markus Schulz <msc@antzsystem.de>
+ Support 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/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 "tda1002x.h"
+
+
+struct tda10021_state {
+ struct i2c_adapter* i2c;
+ /* configuration settings */
+ const struct tda1002x_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 FIN (XIN >> 4)
+
+static 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, __func__, 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);
+ // Don't print an error message if the id is read.
+ if (ret != 2 && reg != 0x1a)
+ printk("DVB: TDA10021: %s: readreg error (ret == %i)\n",
+ __func__, 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) ^ (state->config->invert == 0))
+ reg0 &= ~0x20;
+ else
+ reg0 |= 0x20;
+
+ _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) + DIV_ROUND_CLOSEST(tmp, 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 = 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);
+ return 0;
+}
+
+struct qam_params {
+ u8 conf, agcref, lthr, mseth, aref;
+};
+
+static int tda10021_set_parameters(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ u32 delsys = c->delivery_system;
+ unsigned qam = c->modulation;
+ bool is_annex_c;
+ u32 reg0x3d;
+ struct tda10021_state* state = fe->demodulator_priv;
+ static const struct qam_params qam_params[] = {
+ /* Modulation Conf AGCref LTHR MSETH AREF */
+ [QPSK] = { 0x14, 0x78, 0x78, 0x8c, 0x96 },
+ [QAM_16] = { 0x00, 0x8c, 0x87, 0xa2, 0x91 },
+ [QAM_32] = { 0x04, 0x8c, 0x64, 0x74, 0x96 },
+ [QAM_64] = { 0x08, 0x6a, 0x46, 0x43, 0x6a },
+ [QAM_128] = { 0x0c, 0x78, 0x36, 0x34, 0x7e },
+ [QAM_256] = { 0x10, 0x5c, 0x26, 0x23, 0x6b },
+ };
+
+ switch (delsys) {
+ case SYS_DVBC_ANNEX_A:
+ is_annex_c = false;
+ break;
+ case SYS_DVBC_ANNEX_C:
+ is_annex_c = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /*
+ * gcc optimizes the code bellow the same way as it would code:
+ * "if (qam > 5) return -EINVAL;"
+ * Yet, the code is clearer, as it shows what QAM standards are
+ * supported by the driver, and avoids the usage of magic numbers on
+ * it.
+ */
+ switch (qam) {
+ case QPSK:
+ case QAM_16:
+ case QAM_32:
+ case QAM_64:
+ case QAM_128:
+ case QAM_256:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (c->inversion != INVERSION_ON && c->inversion != INVERSION_OFF)
+ return -EINVAL;
+
+ /*printk("tda10021: set frequency to %d qam=%d symrate=%d\n", p->frequency,qam,p->symbol_rate);*/
+
+ if (fe->ops.tuner_ops.set_params) {
+ fe->ops.tuner_ops.set_params(fe);
+ if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
+ }
+
+ tda10021_set_symbolrate(state, c->symbol_rate);
+ _tda10021_writereg(state, 0x34, state->pwm);
+
+ _tda10021_writereg(state, 0x01, qam_params[qam].agcref);
+ _tda10021_writereg(state, 0x05, qam_params[qam].lthr);
+ _tda10021_writereg(state, 0x08, qam_params[qam].mseth);
+ _tda10021_writereg(state, 0x09, qam_params[qam].aref);
+
+ /*
+ * Bit 0 == 0 means roll-off = 0.15 (Annex A)
+ * == 1 means roll-off = 0.13 (Annex C)
+ */
+ reg0x3d = tda10021_readreg (state, 0x3d);
+ if (is_annex_c)
+ _tda10021_writereg (state, 0x3d, 0x01 | reg0x3d);
+ else
+ _tda10021_writereg (state, 0x3d, 0xfe & reg0x3d);
+ tda10021_setup_reg0(state, qam_params[qam].conf, c->inversion);
+
+ return 0;
+}
+
+static int tda10021_read_status(struct dvb_frontend* fe, fe_status_t* status)
+{
+ struct tda10021_state* 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 = fe->demodulator_priv;
+
+ u32 _ber = tda10021_readreg(state, 0x14) |
+ (tda10021_readreg(state, 0x15) << 8) |
+ ((tda10021_readreg(state, 0x16) & 0x0f) << 16);
+ _tda10021_writereg(state, 0x10, (tda10021_readreg(state, 0x10) & ~0xc0)
+ | (tda10021_inittab[0x10] & 0xc0));
+ *ber = 10 * _ber;
+
+ return 0;
+}
+
+static int tda10021_read_signal_strength(struct dvb_frontend* fe, u16* strength)
+{
+ struct tda10021_state* state = fe->demodulator_priv;
+
+ u8 config = tda10021_readreg(state, 0x02);
+ u8 gain = tda10021_readreg(state, 0x17);
+ if (config & 0x02)
+ /* the agc value is inverted */
+ gain = ~gain;
+ *strength = (gain << 8) | gain;
+
+ return 0;
+}
+
+static int tda10021_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+ struct tda10021_state* 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 = 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 dtv_frontend_properties *p = &fe->dtv_property_cache;
+ struct tda10021_state* 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->symbol_rate * afc) >> 10);
+ }
+
+ p->inversion = ((state->reg0 & 0x20) == 0x20) ^ (state->config->invert != 0) ? INVERSION_ON : INVERSION_OFF;
+ p->modulation = ((state->reg0 >> 2) & 7) + QAM_16;
+
+ p->fec_inner = FEC_NONE;
+ p->frequency = ((p->frequency + 31250) / 62500) * 62500;
+
+ if (sync & 2)
+ p->frequency -= ((s32)p->symbol_rate * afc) >> 10;
+
+ return 0;
+}
+
+static int tda10021_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
+{
+ struct tda10021_state* state = fe->demodulator_priv;
+
+ if (enable) {
+ lock_tuner(state);
+ } else {
+ unlock_tuner(state);
+ }
+ return 0;
+}
+
+static int tda10021_sleep(struct dvb_frontend* fe)
+{
+ struct tda10021_state* 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 = fe->demodulator_priv;
+ kfree(state);
+}
+
+static struct dvb_frontend_ops tda10021_ops;
+
+struct dvb_frontend* tda10021_attach(const struct tda1002x_config* config,
+ struct i2c_adapter* i2c,
+ u8 pwm)
+{
+ struct tda10021_state* state = NULL;
+ u8 id;
+
+ /* allocate memory for the internal state */
+ state = kzalloc(sizeof(struct tda10021_state), GFP_KERNEL);
+ if (state == NULL) goto error;
+
+ /* setup the state */
+ state->config = config;
+ state->i2c = i2c;
+ state->pwm = pwm;
+ state->reg0 = tda10021_inittab[0];
+
+ /* check if the demod is there */
+ id = tda10021_readreg(state, 0x1a);
+ if ((id & 0xf0) != 0x70) goto error;
+
+ /* Don't claim TDA10023 */
+ if (id == 0x7d)
+ goto error;
+
+ printk("TDA10021: i2c-addr = 0x%02x, id = 0x%02x\n",
+ state->config->demod_address, id);
+
+ /* create dvb_frontend */
+ memcpy(&state->frontend.ops, &tda10021_ops, sizeof(struct dvb_frontend_ops));
+ state->frontend.demodulator_priv = state;
+ return &state->frontend;
+
+error:
+ kfree(state);
+ return NULL;
+}
+
+static struct dvb_frontend_ops tda10021_ops = {
+ .delsys = { SYS_DVBC_ANNEX_A, SYS_DVBC_ANNEX_C },
+ .info = {
+ .name = "Philips TDA10021 DVB-C",
+ .frequency_stepsize = 62500,
+ .frequency_min = 47000000,
+ .frequency_max = 862000000,
+ .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,
+ .i2c_gate_ctrl = tda10021_i2c_gate_ctrl,
+
+ .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);
Code Review / kvmfornfv.git / blobdiff