--- /dev/null
+/*
+ VES1820 - Single Chip Cable Channel Receiver driver module
+
+ Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.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/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 <asm/div64.h>
+
+#include "dvb_frontend.h"
+#include "ves1820.h"
+
+
+
+struct ves1820_state {
+ struct i2c_adapter* i2c;
+ /* configuration settings */
+ const struct ves1820_config* config;
+ struct dvb_frontend frontend;
+
+ /* private demodulator data */
+ u8 reg0;
+ u8 pwm;
+};
+
+
+static int verbose;
+
+static u8 ves1820_inittab[] = {
+ 0x69, 0x6A, 0x93, 0x1A, 0x12, 0x46, 0x26, 0x1A,
+ 0x43, 0x6A, 0xAA, 0xAA, 0x1E, 0x85, 0x43, 0x20,
+ 0xE0, 0x00, 0xA1, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
+ 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x40
+};
+
+static int ves1820_writereg(struct ves1820_state *state, u8 reg, u8 data)
+{
+ u8 buf[] = { 0x00, reg, data };
+ struct i2c_msg msg = {.addr = state->config->demod_address,.flags = 0,.buf = buf,.len = 3 };
+ int ret;
+
+ ret = i2c_transfer(state->i2c, &msg, 1);
+
+ if (ret != 1)
+ printk("ves1820: %s(): writereg error (reg == 0x%02x, "
+ "val == 0x%02x, ret == %i)\n", __func__, reg, data, ret);
+
+ return (ret != 1) ? -EREMOTEIO : 0;
+}
+
+static u8 ves1820_readreg(struct ves1820_state *state, u8 reg)
+{
+ u8 b0[] = { 0x00, reg };
+ u8 b1[] = { 0 };
+ struct i2c_msg msg[] = {
+ {.addr = state->config->demod_address,.flags = 0,.buf = b0,.len = 2},
+ {.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("ves1820: %s(): readreg error (reg == 0x%02x, "
+ "ret == %i)\n", __func__, reg, ret);
+
+ return b1[0];
+}
+
+static int ves1820_setup_reg0(struct ves1820_state *state, u8 reg0, fe_spectral_inversion_t inversion)
+{
+ reg0 |= state->reg0 & 0x62;
+
+ if (INVERSION_ON == inversion) {
+ if (!state->config->invert) reg0 |= 0x20;
+ else reg0 &= ~0x20;
+ } else if (INVERSION_OFF == inversion) {
+ if (!state->config->invert) reg0 &= ~0x20;
+ else reg0 |= 0x20;
+ }
+
+ ves1820_writereg(state, 0x00, reg0 & 0xfe);
+ ves1820_writereg(state, 0x00, reg0 | 0x01);
+
+ state->reg0 = reg0;
+
+ return 0;
+}
+
+static int ves1820_set_symbolrate(struct ves1820_state *state, u32 symbolrate)
+{
+ s32 BDR;
+ s32 BDRI;
+ s16 SFIL = 0;
+ u16 NDEC = 0;
+ u32 ratio;
+ u32 fin;
+ u32 tmp;
+ u64 fptmp;
+ u64 fpxin;
+
+ if (symbolrate > state->config->xin / 2)
+ symbolrate = state->config->xin / 2;
+
+ if (symbolrate < 500000)
+ symbolrate = 500000;
+
+ if (symbolrate < state->config->xin / 16)
+ NDEC = 1;
+ if (symbolrate < state->config->xin / 32)
+ NDEC = 2;
+ if (symbolrate < state->config->xin / 64)
+ NDEC = 3;
+
+ /* yeuch! */
+ fpxin = state->config->xin * 10;
+ fptmp = fpxin; do_div(fptmp, 123);
+ if (symbolrate < fptmp)
+ SFIL = 1;
+ fptmp = fpxin; do_div(fptmp, 160);
+ if (symbolrate < fptmp)
+ SFIL = 0;
+ fptmp = fpxin; do_div(fptmp, 246);
+ if (symbolrate < fptmp)
+ SFIL = 1;
+ fptmp = fpxin; do_div(fptmp, 320);
+ if (symbolrate < fptmp)
+ SFIL = 0;
+ fptmp = fpxin; do_div(fptmp, 492);
+ if (symbolrate < fptmp)
+ SFIL = 1;
+ fptmp = fpxin; do_div(fptmp, 640);
+ if (symbolrate < fptmp)
+ SFIL = 0;
+ fptmp = fpxin; do_div(fptmp, 984);
+ if (symbolrate < fptmp)
+ SFIL = 1;
+
+ fin = state->config->xin >> 4;
+ 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 = (((state->config->xin << 5) / symbolrate) + 1) / 2;
+
+ if (BDRI > 0xFF)
+ BDRI = 0xFF;
+
+ SFIL = (SFIL << 4) | ves1820_inittab[0x0E];
+
+ NDEC = (NDEC << 6) | ves1820_inittab[0x03];
+
+ ves1820_writereg(state, 0x03, NDEC);
+ ves1820_writereg(state, 0x0a, BDR & 0xff);
+ ves1820_writereg(state, 0x0b, (BDR >> 8) & 0xff);
+ ves1820_writereg(state, 0x0c, (BDR >> 16) & 0x3f);
+
+ ves1820_writereg(state, 0x0d, BDRI);
+ ves1820_writereg(state, 0x0e, SFIL);
+
+ return 0;
+}
+
+static int ves1820_init(struct dvb_frontend* fe)
+{
+ struct ves1820_state* state = fe->demodulator_priv;
+ int i;
+
+ ves1820_writereg(state, 0, 0);
+
+ for (i = 0; i < sizeof(ves1820_inittab); i++)
+ ves1820_writereg(state, i, ves1820_inittab[i]);
+ if (state->config->selagc)
+ ves1820_writereg(state, 2, ves1820_inittab[2] | 0x08);
+
+ ves1820_writereg(state, 0x34, state->pwm);
+
+ return 0;
+}
+
+static int ves1820_set_parameters(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ struct ves1820_state* state = fe->demodulator_priv;
+ static const u8 reg0x00[] = { 0x00, 0x04, 0x08, 0x0c, 0x10 };
+ static const u8 reg0x01[] = { 140, 140, 106, 100, 92 };
+ static const u8 reg0x05[] = { 135, 100, 70, 54, 38 };
+ static const u8 reg0x08[] = { 162, 116, 67, 52, 35 };
+ static const u8 reg0x09[] = { 145, 150, 106, 126, 107 };
+ int real_qam = p->modulation - QAM_16;
+
+ if (real_qam < 0 || real_qam > 4)
+ return -EINVAL;
+
+ 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);
+ }
+
+ ves1820_set_symbolrate(state, p->symbol_rate);
+ ves1820_writereg(state, 0x34, state->pwm);
+
+ ves1820_writereg(state, 0x01, reg0x01[real_qam]);
+ ves1820_writereg(state, 0x05, reg0x05[real_qam]);
+ ves1820_writereg(state, 0x08, reg0x08[real_qam]);
+ ves1820_writereg(state, 0x09, reg0x09[real_qam]);
+
+ ves1820_setup_reg0(state, reg0x00[real_qam], p->inversion);
+ ves1820_writereg(state, 2, ves1820_inittab[2] | (state->config->selagc ? 0x08 : 0));
+ return 0;
+}
+
+static int ves1820_read_status(struct dvb_frontend* fe, fe_status_t* status)
+{
+ struct ves1820_state* state = fe->demodulator_priv;
+ int sync;
+
+ *status = 0;
+ sync = ves1820_readreg(state, 0x11);
+
+ if (sync & 1)
+ *status |= FE_HAS_SIGNAL;
+
+ if (sync & 2)
+ *status |= FE_HAS_CARRIER;
+
+ if (sync & 2) /* XXX FIXME! */
+ *status |= FE_HAS_VITERBI;
+
+ if (sync & 4)
+ *status |= FE_HAS_SYNC;
+
+ if (sync & 8)
+ *status |= FE_HAS_LOCK;
+
+ return 0;
+}
+
+static int ves1820_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+ struct ves1820_state* state = fe->demodulator_priv;
+
+ u32 _ber = ves1820_readreg(state, 0x14) |
+ (ves1820_readreg(state, 0x15) << 8) |
+ ((ves1820_readreg(state, 0x16) & 0x0f) << 16);
+ *ber = 10 * _ber;
+
+ return 0;
+}
+
+static int ves1820_read_signal_strength(struct dvb_frontend* fe, u16* strength)
+{
+ struct ves1820_state* state = fe->demodulator_priv;
+
+ u8 gain = ves1820_readreg(state, 0x17);
+ *strength = (gain << 8) | gain;
+
+ return 0;
+}
+
+static int ves1820_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+ struct ves1820_state* state = fe->demodulator_priv;
+
+ u8 quality = ~ves1820_readreg(state, 0x18);
+ *snr = (quality << 8) | quality;
+
+ return 0;
+}
+
+static int ves1820_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
+{
+ struct ves1820_state* state = fe->demodulator_priv;
+
+ *ucblocks = ves1820_readreg(state, 0x13) & 0x7f;
+ if (*ucblocks == 0x7f)
+ *ucblocks = 0xffffffff;
+
+ /* reset uncorrected block counter */
+ ves1820_writereg(state, 0x10, ves1820_inittab[0x10] & 0xdf);
+ ves1820_writereg(state, 0x10, ves1820_inittab[0x10]);
+
+ return 0;
+}
+
+static int ves1820_get_frontend(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ struct ves1820_state* state = fe->demodulator_priv;
+ int sync;
+ s8 afc = 0;
+
+ sync = ves1820_readreg(state, 0x11);
+ afc = ves1820_readreg(state, 0x19);
+ if (verbose) {
+ /* AFC only valid when carrier has been recovered */
+ printk(sync & 2 ? "ves1820: AFC (%d) %dHz\n" :
+ "ves1820: [AFC (%d) %dHz]\n", afc, -((s32) p->symbol_rate * afc) >> 10);
+ }
+
+ if (!state->config->invert) {
+ p->inversion = (state->reg0 & 0x20) ? INVERSION_ON : INVERSION_OFF;
+ } else {
+ p->inversion = (!(state->reg0 & 0x20)) ? 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 ves1820_sleep(struct dvb_frontend* fe)
+{
+ struct ves1820_state* state = fe->demodulator_priv;
+
+ ves1820_writereg(state, 0x1b, 0x02); /* pdown ADC */
+ ves1820_writereg(state, 0x00, 0x80); /* standby */
+
+ return 0;
+}
+
+static int ves1820_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
+{
+
+ fesettings->min_delay_ms = 200;
+ fesettings->step_size = 0;
+ fesettings->max_drift = 0;
+ return 0;
+}
+
+static void ves1820_release(struct dvb_frontend* fe)
+{
+ struct ves1820_state* state = fe->demodulator_priv;
+ kfree(state);
+}
+
+static struct dvb_frontend_ops ves1820_ops;
+
+struct dvb_frontend* ves1820_attach(const struct ves1820_config* config,
+ struct i2c_adapter* i2c,
+ u8 pwm)
+{
+ struct ves1820_state* state = NULL;
+
+ /* allocate memory for the internal state */
+ state = kzalloc(sizeof(struct ves1820_state), GFP_KERNEL);
+ if (state == NULL)
+ goto error;
+
+ /* setup the state */
+ state->reg0 = ves1820_inittab[0];
+ state->config = config;
+ state->i2c = i2c;
+ state->pwm = pwm;
+
+ /* check if the demod is there */
+ if ((ves1820_readreg(state, 0x1a) & 0xf0) != 0x70)
+ goto error;
+
+ if (verbose)
+ printk("ves1820: pwm=0x%02x\n", state->pwm);
+
+ /* create dvb_frontend */
+ memcpy(&state->frontend.ops, &ves1820_ops, sizeof(struct dvb_frontend_ops));
+ state->frontend.ops.info.symbol_rate_min = (state->config->xin / 2) / 64; /* SACLK/64 == (XIN/2)/64 */
+ state->frontend.ops.info.symbol_rate_max = (state->config->xin / 2) / 4; /* SACLK/4 */
+ state->frontend.demodulator_priv = state;
+
+ return &state->frontend;
+
+error:
+ kfree(state);
+ return NULL;
+}
+
+static struct dvb_frontend_ops ves1820_ops = {
+ .delsys = { SYS_DVBC_ANNEX_A },
+ .info = {
+ .name = "VLSI VES1820 DVB-C",
+ .frequency_stepsize = 62500,
+ .frequency_min = 47000000,
+ .frequency_max = 862000000,
+ .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
+ },
+
+ .release = ves1820_release,
+
+ .init = ves1820_init,
+ .sleep = ves1820_sleep,
+
+ .set_frontend = ves1820_set_parameters,
+ .get_frontend = ves1820_get_frontend,
+ .get_tune_settings = ves1820_get_tune_settings,
+
+ .read_status = ves1820_read_status,
+ .read_ber = ves1820_read_ber,
+ .read_signal_strength = ves1820_read_signal_strength,
+ .read_snr = ves1820_read_snr,
+ .read_ucblocks = ves1820_read_ucblocks,
+};
+
+module_param(verbose, int, 0644);
+MODULE_PARM_DESC(verbose, "print AFC offset after tuning for debugging the PWM setting");
+
+MODULE_DESCRIPTION("VLSI VES1820 DVB-C Demodulator driver");
+MODULE_AUTHOR("Ralph Metzler, Holger Waechtler");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(ves1820_attach);
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