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Diffstat (limited to 'drivers/media/dvb/frontends/l64781.c')
-rw-r--r--drivers/media/dvb/frontends/l64781.c609
1 files changed, 0 insertions, 609 deletions
diff --git a/drivers/media/dvb/frontends/l64781.c b/drivers/media/dvb/frontends/l64781.c
deleted file mode 100644
index 36fcf559e361..000000000000
--- a/drivers/media/dvb/frontends/l64781.c
+++ /dev/null
@@ -1,609 +0,0 @@
-/*
- driver for LSI L64781 COFDM demodulator
-
- Copyright (C) 2001 Holger Waechtler for Convergence Integrated Media GmbH
- Marko Kohtala <marko.kohtala@luukku.com>
-
- 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/slab.h>
-#include "dvb_frontend.h"
-#include "l64781.h"
-
-
-struct l64781_state {
- struct i2c_adapter* i2c;
- const struct l64781_config* config;
- struct dvb_frontend frontend;
-
- /* private demodulator data */
- unsigned int first:1;
-};
-
-#define dprintk(args...) \
- do { \
- if (debug) printk(KERN_DEBUG "l64781: " args); \
- } while (0)
-
-static int debug;
-
-module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
-
-
-static int l64781_writereg (struct l64781_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 };
-
- if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1)
- dprintk ("%s: write_reg error (reg == %02x) = %02x!\n",
- __func__, reg, ret);
-
- return (ret != 1) ? -1 : 0;
-}
-
-static int l64781_readreg (struct l64781_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) return ret;
-
- return b1[0];
-}
-
-static void apply_tps (struct l64781_state* state)
-{
- l64781_writereg (state, 0x2a, 0x00);
- l64781_writereg (state, 0x2a, 0x01);
-
- /* This here is a little bit questionable because it enables
- the automatic update of TPS registers. I think we'd need to
- handle the IRQ from FE to update some other registers as
- well, or at least implement some magic to tuning to correct
- to the TPS received from transmission. */
- l64781_writereg (state, 0x2a, 0x02);
-}
-
-
-static void reset_afc (struct l64781_state* state)
-{
- /* Set AFC stall for the AFC_INIT_FRQ setting, TIM_STALL for
- timing offset */
- l64781_writereg (state, 0x07, 0x9e); /* stall AFC */
- l64781_writereg (state, 0x08, 0); /* AFC INIT FREQ */
- l64781_writereg (state, 0x09, 0);
- l64781_writereg (state, 0x0a, 0);
- l64781_writereg (state, 0x07, 0x8e);
- l64781_writereg (state, 0x0e, 0); /* AGC gain to zero in beginning */
- l64781_writereg (state, 0x11, 0x80); /* stall TIM */
- l64781_writereg (state, 0x10, 0); /* TIM_OFFSET_LSB */
- l64781_writereg (state, 0x12, 0);
- l64781_writereg (state, 0x13, 0);
- l64781_writereg (state, 0x11, 0x00);
-}
-
-static int reset_and_configure (struct l64781_state* state)
-{
- u8 buf [] = { 0x06 };
- struct i2c_msg msg = { .addr = 0x00, .flags = 0, .buf = buf, .len = 1 };
- // NOTE: this is correct in writing to address 0x00
-
- return (i2c_transfer(state->i2c, &msg, 1) == 1) ? 0 : -ENODEV;
-}
-
-static int apply_frontend_param(struct dvb_frontend *fe)
-{
- struct dtv_frontend_properties *p = &fe->dtv_property_cache;
- struct l64781_state* state = fe->demodulator_priv;
- /* The coderates for FEC_NONE, FEC_4_5 and FEC_FEC_6_7 are arbitrary */
- static const u8 fec_tab[] = { 7, 0, 1, 2, 9, 3, 10, 4 };
- /* QPSK, QAM_16, QAM_64 */
- static const u8 qam_tab [] = { 2, 4, 0, 6 };
- static const u8 guard_tab [] = { 1, 2, 4, 8 };
- /* The Grundig 29504-401.04 Tuner comes with 18.432MHz crystal. */
- static const u32 ppm = 8000;
- u32 ddfs_offset_fixed;
-/* u32 ddfs_offset_variable = 0x6000-((1000000UL+ppm)/ */
-/* bw_tab[p->bandWidth]<<10)/15625; */
- u32 init_freq;
- u32 spi_bias;
- u8 val0x04;
- u8 val0x05;
- u8 val0x06;
- int bw;
-
- switch (p->bandwidth_hz) {
- case 8000000:
- bw = 8;
- break;
- case 7000000:
- bw = 7;
- break;
- case 6000000:
- bw = 6;
- break;
- default:
- 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);
- }
-
- if (p->inversion != INVERSION_ON &&
- p->inversion != INVERSION_OFF)
- return -EINVAL;
-
- if (p->code_rate_HP != FEC_1_2 && p->code_rate_HP != FEC_2_3 &&
- p->code_rate_HP != FEC_3_4 && p->code_rate_HP != FEC_5_6 &&
- p->code_rate_HP != FEC_7_8)
- return -EINVAL;
-
- if (p->hierarchy != HIERARCHY_NONE &&
- (p->code_rate_LP != FEC_1_2 && p->code_rate_LP != FEC_2_3 &&
- p->code_rate_LP != FEC_3_4 && p->code_rate_LP != FEC_5_6 &&
- p->code_rate_LP != FEC_7_8))
- return -EINVAL;
-
- if (p->modulation != QPSK && p->modulation != QAM_16 &&
- p->modulation != QAM_64)
- return -EINVAL;
-
- if (p->transmission_mode != TRANSMISSION_MODE_2K &&
- p->transmission_mode != TRANSMISSION_MODE_8K)
- return -EINVAL;
-
- if (p->guard_interval < GUARD_INTERVAL_1_32 ||
- p->guard_interval > GUARD_INTERVAL_1_4)
- return -EINVAL;
-
- if (p->hierarchy < HIERARCHY_NONE ||
- p->hierarchy > HIERARCHY_4)
- return -EINVAL;
-
- ddfs_offset_fixed = 0x4000-(ppm<<16)/bw/1000000;
-
- /* This works up to 20000 ppm, it overflows if too large ppm! */
- init_freq = (((8UL<<25) + (8UL<<19) / 25*ppm / (15625/25)) /
- bw & 0xFFFFFF);
-
- /* SPI bias calculation is slightly modified to fit in 32bit */
- /* will work for high ppm only... */
- spi_bias = 378 * (1 << 10);
- spi_bias *= 16;
- spi_bias *= bw;
- spi_bias *= qam_tab[p->modulation];
- spi_bias /= p->code_rate_HP + 1;
- spi_bias /= (guard_tab[p->guard_interval] + 32);
- spi_bias *= 1000;
- spi_bias /= 1000 + ppm/1000;
- spi_bias *= p->code_rate_HP;
-
- val0x04 = (p->transmission_mode << 2) | p->guard_interval;
- val0x05 = fec_tab[p->code_rate_HP];
-
- if (p->hierarchy != HIERARCHY_NONE)
- val0x05 |= (p->code_rate_LP - FEC_1_2) << 3;
-
- val0x06 = (p->hierarchy << 2) | p->modulation;
-
- l64781_writereg (state, 0x04, val0x04);
- l64781_writereg (state, 0x05, val0x05);
- l64781_writereg (state, 0x06, val0x06);
-
- reset_afc (state);
-
- /* Technical manual section 2.6.1, TIM_IIR_GAIN optimal values */
- l64781_writereg (state, 0x15,
- p->transmission_mode == TRANSMISSION_MODE_2K ? 1 : 3);
- l64781_writereg (state, 0x16, init_freq & 0xff);
- l64781_writereg (state, 0x17, (init_freq >> 8) & 0xff);
- l64781_writereg (state, 0x18, (init_freq >> 16) & 0xff);
-
- l64781_writereg (state, 0x1b, spi_bias & 0xff);
- l64781_writereg (state, 0x1c, (spi_bias >> 8) & 0xff);
- l64781_writereg (state, 0x1d, ((spi_bias >> 16) & 0x7f) |
- (p->inversion == INVERSION_ON ? 0x80 : 0x00));
-
- l64781_writereg (state, 0x22, ddfs_offset_fixed & 0xff);
- l64781_writereg (state, 0x23, (ddfs_offset_fixed >> 8) & 0x3f);
-
- l64781_readreg (state, 0x00); /* clear interrupt registers... */
- l64781_readreg (state, 0x01); /* dto. */
-
- apply_tps (state);
-
- return 0;
-}
-
-static int get_frontend(struct dvb_frontend *fe)
-{
- struct dtv_frontend_properties *p = &fe->dtv_property_cache;
- struct l64781_state* state = fe->demodulator_priv;
- int tmp;
-
-
- tmp = l64781_readreg(state, 0x04);
- switch(tmp & 3) {
- case 0:
- p->guard_interval = GUARD_INTERVAL_1_32;
- break;
- case 1:
- p->guard_interval = GUARD_INTERVAL_1_16;
- break;
- case 2:
- p->guard_interval = GUARD_INTERVAL_1_8;
- break;
- case 3:
- p->guard_interval = GUARD_INTERVAL_1_4;
- break;
- }
- switch((tmp >> 2) & 3) {
- case 0:
- p->transmission_mode = TRANSMISSION_MODE_2K;
- break;
- case 1:
- p->transmission_mode = TRANSMISSION_MODE_8K;
- break;
- default:
- printk(KERN_WARNING "Unexpected value for transmission_mode\n");
- }
-
- tmp = l64781_readreg(state, 0x05);
- switch(tmp & 7) {
- case 0:
- p->code_rate_HP = FEC_1_2;
- break;
- case 1:
- p->code_rate_HP = FEC_2_3;
- break;
- case 2:
- p->code_rate_HP = FEC_3_4;
- break;
- case 3:
- p->code_rate_HP = FEC_5_6;
- break;
- case 4:
- p->code_rate_HP = FEC_7_8;
- break;
- default:
- printk("Unexpected value for code_rate_HP\n");
- }
- switch((tmp >> 3) & 7) {
- case 0:
- p->code_rate_LP = FEC_1_2;
- break;
- case 1:
- p->code_rate_LP = FEC_2_3;
- break;
- case 2:
- p->code_rate_LP = FEC_3_4;
- break;
- case 3:
- p->code_rate_LP = FEC_5_6;
- break;
- case 4:
- p->code_rate_LP = FEC_7_8;
- break;
- default:
- printk("Unexpected value for code_rate_LP\n");
- }
-
- tmp = l64781_readreg(state, 0x06);
- switch(tmp & 3) {
- case 0:
- p->modulation = QPSK;
- break;
- case 1:
- p->modulation = QAM_16;
- break;
- case 2:
- p->modulation = QAM_64;
- break;
- default:
- printk(KERN_WARNING "Unexpected value for modulation\n");
- }
- switch((tmp >> 2) & 7) {
- case 0:
- p->hierarchy = HIERARCHY_NONE;
- break;
- case 1:
- p->hierarchy = HIERARCHY_1;
- break;
- case 2:
- p->hierarchy = HIERARCHY_2;
- break;
- case 3:
- p->hierarchy = HIERARCHY_4;
- break;
- default:
- printk("Unexpected value for hierarchy\n");
- }
-
-
- tmp = l64781_readreg (state, 0x1d);
- p->inversion = (tmp & 0x80) ? INVERSION_ON : INVERSION_OFF;
-
- tmp = (int) (l64781_readreg (state, 0x08) |
- (l64781_readreg (state, 0x09) << 8) |
- (l64781_readreg (state, 0x0a) << 16));
- p->frequency += tmp;
-
- return 0;
-}
-
-static int l64781_read_status(struct dvb_frontend* fe, fe_status_t* status)
-{
- struct l64781_state* state = fe->demodulator_priv;
- int sync = l64781_readreg (state, 0x32);
- int gain = l64781_readreg (state, 0x0e);
-
- l64781_readreg (state, 0x00); /* clear interrupt registers... */
- l64781_readreg (state, 0x01); /* dto. */
-
- *status = 0;
-
- if (gain > 5)
- *status |= FE_HAS_SIGNAL;
-
- if (sync & 0x02) /* VCXO locked, this criteria should be ok */
- *status |= FE_HAS_CARRIER;
-
- if (sync & 0x20)
- *status |= FE_HAS_VITERBI;
-
- if (sync & 0x40)
- *status |= FE_HAS_SYNC;
-
- if (sync == 0x7f)
- *status |= FE_HAS_LOCK;
-
- return 0;
-}
-
-static int l64781_read_ber(struct dvb_frontend* fe, u32* ber)
-{
- struct l64781_state* state = fe->demodulator_priv;
-
- /* XXX FIXME: set up counting period (reg 0x26...0x28)
- */
- *ber = l64781_readreg (state, 0x39)
- | (l64781_readreg (state, 0x3a) << 8);
-
- return 0;
-}
-
-static int l64781_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
-{
- struct l64781_state* state = fe->demodulator_priv;
-
- u8 gain = l64781_readreg (state, 0x0e);
- *signal_strength = (gain << 8) | gain;
-
- return 0;
-}
-
-static int l64781_read_snr(struct dvb_frontend* fe, u16* snr)
-{
- struct l64781_state* state = fe->demodulator_priv;
-
- u8 avg_quality = 0xff - l64781_readreg (state, 0x33);
- *snr = (avg_quality << 8) | avg_quality; /* not exact, but...*/
-
- return 0;
-}
-
-static int l64781_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
-{
- struct l64781_state* state = fe->demodulator_priv;
-
- *ucblocks = l64781_readreg (state, 0x37)
- | (l64781_readreg (state, 0x38) << 8);
-
- return 0;
-}
-
-static int l64781_sleep(struct dvb_frontend* fe)
-{
- struct l64781_state* state = fe->demodulator_priv;
-
- /* Power down */
- return l64781_writereg (state, 0x3e, 0x5a);
-}
-
-static int l64781_init(struct dvb_frontend* fe)
-{
- struct l64781_state* state = fe->demodulator_priv;
-
- reset_and_configure (state);
-
- /* Power up */
- l64781_writereg (state, 0x3e, 0xa5);
-
- /* Reset hard */
- l64781_writereg (state, 0x2a, 0x04);
- l64781_writereg (state, 0x2a, 0x00);
-
- /* Set tuner specific things */
- /* AFC_POL, set also in reset_afc */
- l64781_writereg (state, 0x07, 0x8e);
-
- /* Use internal ADC */
- l64781_writereg (state, 0x0b, 0x81);
-
- /* AGC loop gain, and polarity is positive */
- l64781_writereg (state, 0x0c, 0x84);
-
- /* Internal ADC outputs two's complement */
- l64781_writereg (state, 0x0d, 0x8c);
-
- /* With ppm=8000, it seems the DTR_SENSITIVITY will result in
- value of 2 with all possible bandwidths and guard
- intervals, which is the initial value anyway. */
- /*l64781_writereg (state, 0x19, 0x92);*/
-
- /* Everything is two's complement, soft bit and CSI_OUT too */
- l64781_writereg (state, 0x1e, 0x09);
-
- /* delay a bit after first init attempt */
- if (state->first) {
- state->first = 0;
- msleep(200);
- }
-
- return 0;
-}
-
-static int l64781_get_tune_settings(struct dvb_frontend* fe,
- struct dvb_frontend_tune_settings* fesettings)
-{
- fesettings->min_delay_ms = 4000;
- fesettings->step_size = 0;
- fesettings->max_drift = 0;
- return 0;
-}
-
-static void l64781_release(struct dvb_frontend* fe)
-{
- struct l64781_state* state = fe->demodulator_priv;
- kfree(state);
-}
-
-static struct dvb_frontend_ops l64781_ops;
-
-struct dvb_frontend* l64781_attach(const struct l64781_config* config,
- struct i2c_adapter* i2c)
-{
- struct l64781_state* state = NULL;
- int reg0x3e = -1;
- u8 b0 [] = { 0x1a };
- u8 b1 [] = { 0x00 };
- struct i2c_msg msg [] = { { .addr = config->demod_address, .flags = 0, .buf = b0, .len = 1 },
- { .addr = config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
-
- /* allocate memory for the internal state */
- state = kzalloc(sizeof(struct l64781_state), GFP_KERNEL);
- if (state == NULL) goto error;
-
- /* setup the state */
- state->config = config;
- state->i2c = i2c;
- state->first = 1;
-
- /**
- * the L64781 won't show up before we send the reset_and_configure()
- * broadcast. If nothing responds there is no L64781 on the bus...
- */
- if (reset_and_configure(state) < 0) {
- dprintk("No response to reset and configure broadcast...\n");
- goto error;
- }
-
- /* The chip always responds to reads */
- if (i2c_transfer(state->i2c, msg, 2) != 2) {
- dprintk("No response to read on I2C bus\n");
- goto error;
- }
-
- /* Save current register contents for bailout */
- reg0x3e = l64781_readreg(state, 0x3e);
-
- /* Reading the POWER_DOWN register always returns 0 */
- if (reg0x3e != 0) {
- dprintk("Device doesn't look like L64781\n");
- goto error;
- }
-
- /* Turn the chip off */
- l64781_writereg (state, 0x3e, 0x5a);
-
- /* Responds to all reads with 0 */
- if (l64781_readreg(state, 0x1a) != 0) {
- dprintk("Read 1 returned unexpcted value\n");
- goto error;
- }
-
- /* Turn the chip on */
- l64781_writereg (state, 0x3e, 0xa5);
-
- /* Responds with register default value */
- if (l64781_readreg(state, 0x1a) != 0xa1) {
- dprintk("Read 2 returned unexpcted value\n");
- goto error;
- }
-
- /* create dvb_frontend */
- memcpy(&state->frontend.ops, &l64781_ops, sizeof(struct dvb_frontend_ops));
- state->frontend.demodulator_priv = state;
- return &state->frontend;
-
-error:
- if (reg0x3e >= 0)
- l64781_writereg (state, 0x3e, reg0x3e); /* restore reg 0x3e */
- kfree(state);
- return NULL;
-}
-
-static struct dvb_frontend_ops l64781_ops = {
- .delsys = { SYS_DVBT },
- .info = {
- .name = "LSI L64781 DVB-T",
- /* .frequency_min = ???,*/
- /* .frequency_max = ???,*/
- .frequency_stepsize = 166666,
- /* .frequency_tolerance = ???,*/
- /* .symbol_rate_tolerance = ???,*/
- .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_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
- FE_CAN_MUTE_TS
- },
-
- .release = l64781_release,
-
- .init = l64781_init,
- .sleep = l64781_sleep,
-
- .set_frontend = apply_frontend_param,
- .get_frontend = get_frontend,
- .get_tune_settings = l64781_get_tune_settings,
-
- .read_status = l64781_read_status,
- .read_ber = l64781_read_ber,
- .read_signal_strength = l64781_read_signal_strength,
- .read_snr = l64781_read_snr,
- .read_ucblocks = l64781_read_ucblocks,
-};
-
-MODULE_DESCRIPTION("LSI L64781 DVB-T Demodulator driver");
-MODULE_AUTHOR("Holger Waechtler, Marko Kohtala");
-MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL(l64781_attach);
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