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path: root/drivers/media/dvb/frontends/zl10353.c
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Diffstat (limited to 'drivers/media/dvb/frontends/zl10353.c')
-rw-r--r--drivers/media/dvb/frontends/zl10353.c685
1 files changed, 685 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/zl10353.c b/drivers/media/dvb/frontends/zl10353.c
new file mode 100644
index 00000000..ac723789
--- /dev/null
+++ b/drivers/media/dvb/frontends/zl10353.c
@@ -0,0 +1,685 @@
+/*
+ * Driver for Zarlink DVB-T ZL10353 demodulator
+ *
+ * Copyright (C) 2006, 2007 Christopher Pascoe <c.pascoe@itee.uq.edu.au>
+ *
+ * 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/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <asm/div64.h>
+
+#include "dvb_frontend.h"
+#include "zl10353_priv.h"
+#include "zl10353.h"
+
+struct zl10353_state {
+ struct i2c_adapter *i2c;
+ struct dvb_frontend frontend;
+
+ struct zl10353_config config;
+
+ u32 bandwidth;
+ u32 ucblocks;
+ u32 frequency;
+};
+
+static int debug;
+#define dprintk(args...) \
+ do { \
+ if (debug) printk(KERN_DEBUG "zl10353: " args); \
+ } while (0)
+
+static int debug_regs;
+
+static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+ u8 buf[2] = { reg, val };
+ struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0,
+ .buf = buf, .len = 2 };
+ int err = i2c_transfer(state->i2c, &msg, 1);
+ if (err != 1) {
+ printk("zl10353: write to reg %x failed (err = %d)!\n", reg, err);
+ return err;
+ }
+ return 0;
+}
+
+static int zl10353_write(struct dvb_frontend *fe, const u8 ibuf[], int ilen)
+{
+ int err, i;
+ for (i = 0; i < ilen - 1; i++)
+ if ((err = zl10353_single_write(fe, ibuf[0] + i, ibuf[i + 1])))
+ return err;
+
+ return 0;
+}
+
+static int zl10353_read_register(struct zl10353_state *state, u8 reg)
+{
+ int ret;
+ u8 b0[1] = { reg };
+ u8 b1[1] = { 0 };
+ struct i2c_msg msg[2] = { { .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) {
+ printk("%s: readreg error (reg=%d, ret==%i)\n",
+ __func__, reg, ret);
+ return ret;
+ }
+
+ return b1[0];
+}
+
+static void zl10353_dump_regs(struct dvb_frontend *fe)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+ int ret;
+ u8 reg;
+
+ /* Dump all registers. */
+ for (reg = 0; ; reg++) {
+ if (reg % 16 == 0) {
+ if (reg)
+ printk(KERN_CONT "\n");
+ printk(KERN_DEBUG "%02x:", reg);
+ }
+ ret = zl10353_read_register(state, reg);
+ if (ret >= 0)
+ printk(KERN_CONT " %02x", (u8)ret);
+ else
+ printk(KERN_CONT " --");
+ if (reg == 0xff)
+ break;
+ }
+ printk(KERN_CONT "\n");
+}
+
+static void zl10353_calc_nominal_rate(struct dvb_frontend *fe,
+ u32 bandwidth,
+ u16 *nominal_rate)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+ u32 adc_clock = 450560; /* 45.056 MHz */
+ u64 value;
+ u8 bw = bandwidth / 1000000;
+
+ if (state->config.adc_clock)
+ adc_clock = state->config.adc_clock;
+
+ value = (u64)10 * (1 << 23) / 7 * 125;
+ value = (bw * value) + adc_clock / 2;
+ do_div(value, adc_clock);
+ *nominal_rate = value;
+
+ dprintk("%s: bw %d, adc_clock %d => 0x%x\n",
+ __func__, bw, adc_clock, *nominal_rate);
+}
+
+static void zl10353_calc_input_freq(struct dvb_frontend *fe,
+ u16 *input_freq)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+ u32 adc_clock = 450560; /* 45.056 MHz */
+ int if2 = 361667; /* 36.1667 MHz */
+ int ife;
+ u64 value;
+
+ if (state->config.adc_clock)
+ adc_clock = state->config.adc_clock;
+ if (state->config.if2)
+ if2 = state->config.if2;
+
+ if (adc_clock >= if2 * 2)
+ ife = if2;
+ else {
+ ife = adc_clock - (if2 % adc_clock);
+ if (ife > adc_clock / 2)
+ ife = adc_clock - ife;
+ }
+ value = (u64)65536 * ife + adc_clock / 2;
+ do_div(value, adc_clock);
+ *input_freq = -value;
+
+ dprintk("%s: if2 %d, ife %d, adc_clock %d => %d / 0x%x\n",
+ __func__, if2, ife, adc_clock, -(int)value, *input_freq);
+}
+
+static int zl10353_sleep(struct dvb_frontend *fe)
+{
+ static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 };
+
+ zl10353_write(fe, zl10353_softdown, sizeof(zl10353_softdown));
+ return 0;
+}
+
+static int zl10353_set_parameters(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ struct zl10353_state *state = fe->demodulator_priv;
+ u16 nominal_rate, input_freq;
+ u8 pllbuf[6] = { 0x67 }, acq_ctl = 0;
+ u16 tps = 0;
+
+ state->frequency = c->frequency;
+
+ zl10353_single_write(fe, RESET, 0x80);
+ udelay(200);
+ zl10353_single_write(fe, 0xEA, 0x01);
+ udelay(200);
+ zl10353_single_write(fe, 0xEA, 0x00);
+
+ zl10353_single_write(fe, AGC_TARGET, 0x28);
+
+ if (c->transmission_mode != TRANSMISSION_MODE_AUTO)
+ acq_ctl |= (1 << 0);
+ if (c->guard_interval != GUARD_INTERVAL_AUTO)
+ acq_ctl |= (1 << 1);
+ zl10353_single_write(fe, ACQ_CTL, acq_ctl);
+
+ switch (c->bandwidth_hz) {
+ case 6000000:
+ /* These are extrapolated from the 7 and 8MHz values */
+ zl10353_single_write(fe, MCLK_RATIO, 0x97);
+ zl10353_single_write(fe, 0x64, 0x34);
+ zl10353_single_write(fe, 0xcc, 0xdd);
+ break;
+ case 7000000:
+ zl10353_single_write(fe, MCLK_RATIO, 0x86);
+ zl10353_single_write(fe, 0x64, 0x35);
+ zl10353_single_write(fe, 0xcc, 0x73);
+ break;
+ default:
+ c->bandwidth_hz = 8000000;
+ /* fall though */
+ case 8000000:
+ zl10353_single_write(fe, MCLK_RATIO, 0x75);
+ zl10353_single_write(fe, 0x64, 0x36);
+ zl10353_single_write(fe, 0xcc, 0x73);
+ }
+
+ zl10353_calc_nominal_rate(fe, c->bandwidth_hz, &nominal_rate);
+ zl10353_single_write(fe, TRL_NOMINAL_RATE_1, msb(nominal_rate));
+ zl10353_single_write(fe, TRL_NOMINAL_RATE_0, lsb(nominal_rate));
+ state->bandwidth = c->bandwidth_hz;
+
+ zl10353_calc_input_freq(fe, &input_freq);
+ zl10353_single_write(fe, INPUT_FREQ_1, msb(input_freq));
+ zl10353_single_write(fe, INPUT_FREQ_0, lsb(input_freq));
+
+ /* Hint at TPS settings */
+ switch (c->code_rate_HP) {
+ case FEC_2_3:
+ tps |= (1 << 7);
+ break;
+ case FEC_3_4:
+ tps |= (2 << 7);
+ break;
+ case FEC_5_6:
+ tps |= (3 << 7);
+ break;
+ case FEC_7_8:
+ tps |= (4 << 7);
+ break;
+ case FEC_1_2:
+ case FEC_AUTO:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (c->code_rate_LP) {
+ case FEC_2_3:
+ tps |= (1 << 4);
+ break;
+ case FEC_3_4:
+ tps |= (2 << 4);
+ break;
+ case FEC_5_6:
+ tps |= (3 << 4);
+ break;
+ case FEC_7_8:
+ tps |= (4 << 4);
+ break;
+ case FEC_1_2:
+ case FEC_AUTO:
+ break;
+ case FEC_NONE:
+ if (c->hierarchy == HIERARCHY_AUTO ||
+ c->hierarchy == HIERARCHY_NONE)
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (c->modulation) {
+ case QPSK:
+ break;
+ case QAM_AUTO:
+ case QAM_16:
+ tps |= (1 << 13);
+ break;
+ case QAM_64:
+ tps |= (2 << 13);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (c->transmission_mode) {
+ case TRANSMISSION_MODE_2K:
+ case TRANSMISSION_MODE_AUTO:
+ break;
+ case TRANSMISSION_MODE_8K:
+ tps |= (1 << 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (c->guard_interval) {
+ case GUARD_INTERVAL_1_32:
+ case GUARD_INTERVAL_AUTO:
+ break;
+ case GUARD_INTERVAL_1_16:
+ tps |= (1 << 2);
+ break;
+ case GUARD_INTERVAL_1_8:
+ tps |= (2 << 2);
+ break;
+ case GUARD_INTERVAL_1_4:
+ tps |= (3 << 2);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (c->hierarchy) {
+ case HIERARCHY_AUTO:
+ case HIERARCHY_NONE:
+ break;
+ case HIERARCHY_1:
+ tps |= (1 << 10);
+ break;
+ case HIERARCHY_2:
+ tps |= (2 << 10);
+ break;
+ case HIERARCHY_4:
+ tps |= (3 << 10);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ zl10353_single_write(fe, TPS_GIVEN_1, msb(tps));
+ zl10353_single_write(fe, TPS_GIVEN_0, lsb(tps));
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+
+ /*
+ * If there is no tuner attached to the secondary I2C bus, we call
+ * set_params to program a potential tuner attached somewhere else.
+ * Otherwise, we update the PLL registers via calc_regs.
+ */
+ if (state->config.no_tuner) {
+ 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);
+ }
+ } else if (fe->ops.tuner_ops.calc_regs) {
+ fe->ops.tuner_ops.calc_regs(fe, pllbuf + 1, 5);
+ pllbuf[1] <<= 1;
+ zl10353_write(fe, pllbuf, sizeof(pllbuf));
+ }
+
+ zl10353_single_write(fe, 0x5F, 0x13);
+
+ /* If no attached tuner or invalid PLL registers, just start the FSM. */
+ if (state->config.no_tuner || fe->ops.tuner_ops.calc_regs == NULL)
+ zl10353_single_write(fe, FSM_GO, 0x01);
+ else
+ zl10353_single_write(fe, TUNER_GO, 0x01);
+
+ return 0;
+}
+
+static int zl10353_get_parameters(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ struct zl10353_state *state = fe->demodulator_priv;
+ int s6, s9;
+ u16 tps;
+ static const u8 tps_fec_to_api[8] = {
+ FEC_1_2,
+ FEC_2_3,
+ FEC_3_4,
+ FEC_5_6,
+ FEC_7_8,
+ FEC_AUTO,
+ FEC_AUTO,
+ FEC_AUTO
+ };
+
+ s6 = zl10353_read_register(state, STATUS_6);
+ s9 = zl10353_read_register(state, STATUS_9);
+ if (s6 < 0 || s9 < 0)
+ return -EREMOTEIO;
+ if ((s6 & (1 << 5)) == 0 || (s9 & (1 << 4)) == 0)
+ return -EINVAL; /* no FE or TPS lock */
+
+ tps = zl10353_read_register(state, TPS_RECEIVED_1) << 8 |
+ zl10353_read_register(state, TPS_RECEIVED_0);
+
+ c->code_rate_HP = tps_fec_to_api[(tps >> 7) & 7];
+ c->code_rate_LP = tps_fec_to_api[(tps >> 4) & 7];
+
+ switch ((tps >> 13) & 3) {
+ case 0:
+ c->modulation = QPSK;
+ break;
+ case 1:
+ c->modulation = QAM_16;
+ break;
+ case 2:
+ c->modulation = QAM_64;
+ break;
+ default:
+ c->modulation = QAM_AUTO;
+ break;
+ }
+
+ c->transmission_mode = (tps & 0x01) ? TRANSMISSION_MODE_8K :
+ TRANSMISSION_MODE_2K;
+
+ switch ((tps >> 2) & 3) {
+ case 0:
+ c->guard_interval = GUARD_INTERVAL_1_32;
+ break;
+ case 1:
+ c->guard_interval = GUARD_INTERVAL_1_16;
+ break;
+ case 2:
+ c->guard_interval = GUARD_INTERVAL_1_8;
+ break;
+ case 3:
+ c->guard_interval = GUARD_INTERVAL_1_4;
+ break;
+ default:
+ c->guard_interval = GUARD_INTERVAL_AUTO;
+ break;
+ }
+
+ switch ((tps >> 10) & 7) {
+ case 0:
+ c->hierarchy = HIERARCHY_NONE;
+ break;
+ case 1:
+ c->hierarchy = HIERARCHY_1;
+ break;
+ case 2:
+ c->hierarchy = HIERARCHY_2;
+ break;
+ case 3:
+ c->hierarchy = HIERARCHY_4;
+ break;
+ default:
+ c->hierarchy = HIERARCHY_AUTO;
+ break;
+ }
+
+ c->frequency = state->frequency;
+ c->bandwidth_hz = state->bandwidth;
+ c->inversion = INVERSION_AUTO;
+
+ return 0;
+}
+
+static int zl10353_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+ int s6, s7, s8;
+
+ if ((s6 = zl10353_read_register(state, STATUS_6)) < 0)
+ return -EREMOTEIO;
+ if ((s7 = zl10353_read_register(state, STATUS_7)) < 0)
+ return -EREMOTEIO;
+ if ((s8 = zl10353_read_register(state, STATUS_8)) < 0)
+ return -EREMOTEIO;
+
+ *status = 0;
+ if (s6 & (1 << 2))
+ *status |= FE_HAS_CARRIER;
+ if (s6 & (1 << 1))
+ *status |= FE_HAS_VITERBI;
+ if (s6 & (1 << 5))
+ *status |= FE_HAS_LOCK;
+ if (s7 & (1 << 4))
+ *status |= FE_HAS_SYNC;
+ if (s8 & (1 << 6))
+ *status |= FE_HAS_SIGNAL;
+
+ if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
+ (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
+ *status &= ~FE_HAS_LOCK;
+
+ return 0;
+}
+
+static int zl10353_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+
+ *ber = zl10353_read_register(state, RS_ERR_CNT_2) << 16 |
+ zl10353_read_register(state, RS_ERR_CNT_1) << 8 |
+ zl10353_read_register(state, RS_ERR_CNT_0);
+
+ return 0;
+}
+
+static int zl10353_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+
+ u16 signal = zl10353_read_register(state, AGC_GAIN_1) << 10 |
+ zl10353_read_register(state, AGC_GAIN_0) << 2 | 3;
+
+ *strength = ~signal;
+
+ return 0;
+}
+
+static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+ u8 _snr;
+
+ if (debug_regs)
+ zl10353_dump_regs(fe);
+
+ _snr = zl10353_read_register(state, SNR);
+ *snr = (_snr << 8) | _snr;
+
+ return 0;
+}
+
+static int zl10353_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+ u32 ubl = 0;
+
+ ubl = zl10353_read_register(state, RS_UBC_1) << 8 |
+ zl10353_read_register(state, RS_UBC_0);
+
+ state->ucblocks += ubl;
+ *ucblocks = state->ucblocks;
+
+ return 0;
+}
+
+static int zl10353_get_tune_settings(struct dvb_frontend *fe,
+ struct dvb_frontend_tune_settings
+ *fe_tune_settings)
+{
+ fe_tune_settings->min_delay_ms = 1000;
+ fe_tune_settings->step_size = 0;
+ fe_tune_settings->max_drift = 0;
+
+ return 0;
+}
+
+static int zl10353_init(struct dvb_frontend *fe)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+ u8 zl10353_reset_attach[6] = { 0x50, 0x03, 0x64, 0x46, 0x15, 0x0F };
+ int rc = 0;
+
+ if (debug_regs)
+ zl10353_dump_regs(fe);
+ if (state->config.parallel_ts)
+ zl10353_reset_attach[2] &= ~0x20;
+ if (state->config.clock_ctl_1)
+ zl10353_reset_attach[3] = state->config.clock_ctl_1;
+ if (state->config.pll_0)
+ zl10353_reset_attach[4] = state->config.pll_0;
+
+ /* Do a "hard" reset if not already done */
+ if (zl10353_read_register(state, 0x50) != zl10353_reset_attach[1] ||
+ zl10353_read_register(state, 0x51) != zl10353_reset_attach[2]) {
+ rc = zl10353_write(fe, zl10353_reset_attach,
+ sizeof(zl10353_reset_attach));
+ if (debug_regs)
+ zl10353_dump_regs(fe);
+ }
+
+ return 0;
+}
+
+static int zl10353_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+ u8 val = 0x0a;
+
+ if (state->config.disable_i2c_gate_ctrl) {
+ /* No tuner attached to the internal I2C bus */
+ /* If set enable I2C bridge, the main I2C bus stopped hardly */
+ return 0;
+ }
+
+ if (enable)
+ val |= 0x10;
+
+ return zl10353_single_write(fe, 0x62, val);
+}
+
+static void zl10353_release(struct dvb_frontend *fe)
+{
+ struct zl10353_state *state = fe->demodulator_priv;
+ kfree(state);
+}
+
+static struct dvb_frontend_ops zl10353_ops;
+
+struct dvb_frontend *zl10353_attach(const struct zl10353_config *config,
+ struct i2c_adapter *i2c)
+{
+ struct zl10353_state *state = NULL;
+ int id;
+
+ /* allocate memory for the internal state */
+ state = kzalloc(sizeof(struct zl10353_state), GFP_KERNEL);
+ if (state == NULL)
+ goto error;
+
+ /* setup the state */
+ state->i2c = i2c;
+ memcpy(&state->config, config, sizeof(struct zl10353_config));
+
+ /* check if the demod is there */
+ id = zl10353_read_register(state, CHIP_ID);
+ if ((id != ID_ZL10353) && (id != ID_CE6230) && (id != ID_CE6231))
+ goto error;
+
+ /* create dvb_frontend */
+ memcpy(&state->frontend.ops, &zl10353_ops, sizeof(struct dvb_frontend_ops));
+ state->frontend.demodulator_priv = state;
+
+ return &state->frontend;
+error:
+ kfree(state);
+ return NULL;
+}
+
+static struct dvb_frontend_ops zl10353_ops = {
+ .delsys = { SYS_DVBT },
+ .info = {
+ .name = "Zarlink ZL10353 DVB-T",
+ .frequency_min = 174000000,
+ .frequency_max = 862000000,
+ .frequency_stepsize = 166667,
+ .frequency_tolerance = 0,
+ .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 |
+ FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
+ FE_CAN_FEC_AUTO |
+ FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
+ FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
+ FE_CAN_HIERARCHY_AUTO | FE_CAN_RECOVER |
+ FE_CAN_MUTE_TS
+ },
+
+ .release = zl10353_release,
+
+ .init = zl10353_init,
+ .sleep = zl10353_sleep,
+ .i2c_gate_ctrl = zl10353_i2c_gate_ctrl,
+ .write = zl10353_write,
+
+ .set_frontend = zl10353_set_parameters,
+ .get_frontend = zl10353_get_parameters,
+ .get_tune_settings = zl10353_get_tune_settings,
+
+ .read_status = zl10353_read_status,
+ .read_ber = zl10353_read_ber,
+ .read_signal_strength = zl10353_read_signal_strength,
+ .read_snr = zl10353_read_snr,
+ .read_ucblocks = zl10353_read_ucblocks,
+};
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+module_param(debug_regs, int, 0644);
+MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off).");
+
+MODULE_DESCRIPTION("Zarlink ZL10353 DVB-T demodulator driver");
+MODULE_AUTHOR("Chris Pascoe");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(zl10353_attach);
generated by cgit (git 2.34.1) at 2024-12-23 00:24:06 +0000