diff options
Diffstat (limited to 'drivers/media/dvb/frontends/cx22700.c')
| -rw-r--r-- | drivers/media/dvb/frontends/cx22700.c | 443 |
1 files changed, 0 insertions, 443 deletions
diff --git a/drivers/media/dvb/frontends/cx22700.c b/drivers/media/dvb/frontends/cx22700.c deleted file mode 100644 index f2a90f990ce3..000000000000 --- a/drivers/media/dvb/frontends/cx22700.c +++ /dev/null @@ -1,443 +0,0 @@ -/* - Conexant cx22700 DVB OFDM demodulator driver - - Copyright (C) 2001-2002 Convergence Integrated Media GmbH - Holger Waechtler <holger@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/kernel.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/string.h> -#include <linux/slab.h> -#include "dvb_frontend.h" -#include "cx22700.h" - - -struct cx22700_state { - - struct i2c_adapter* i2c; - - const struct cx22700_config* config; - - struct dvb_frontend frontend; -}; - - -static int debug; -#define dprintk(args...) \ - do { \ - if (debug) printk(KERN_DEBUG "cx22700: " args); \ - } while (0) - -static u8 init_tab [] = { - 0x04, 0x10, - 0x05, 0x09, - 0x06, 0x00, - 0x08, 0x04, - 0x09, 0x00, - 0x0a, 0x01, - 0x15, 0x40, - 0x16, 0x10, - 0x17, 0x87, - 0x18, 0x17, - 0x1a, 0x10, - 0x25, 0x04, - 0x2e, 0x00, - 0x39, 0x00, - 0x3a, 0x04, - 0x45, 0x08, - 0x46, 0x02, - 0x47, 0x05, -}; - - -static int cx22700_writereg (struct cx22700_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 }; - - dprintk ("%s\n", __func__); - - ret = i2c_transfer (state->i2c, &msg, 1); - - if (ret != 1) - printk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n", - __func__, reg, data, ret); - - return (ret != 1) ? -1 : 0; -} - -static int cx22700_readreg (struct cx22700_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 } }; - - dprintk ("%s\n", __func__); - - ret = i2c_transfer (state->i2c, msg, 2); - - if (ret != 2) return -EIO; - - return b1[0]; -} - -static int cx22700_set_inversion (struct cx22700_state* state, int inversion) -{ - u8 val; - - dprintk ("%s\n", __func__); - - switch (inversion) { - case INVERSION_AUTO: - return -EOPNOTSUPP; - case INVERSION_ON: - val = cx22700_readreg (state, 0x09); - return cx22700_writereg (state, 0x09, val | 0x01); - case INVERSION_OFF: - val = cx22700_readreg (state, 0x09); - return cx22700_writereg (state, 0x09, val & 0xfe); - default: - return -EINVAL; - } -} - -static int cx22700_set_tps(struct cx22700_state *state, - struct dtv_frontend_properties *p) -{ - static const u8 qam_tab [4] = { 0, 1, 0, 2 }; - static const u8 fec_tab [6] = { 0, 1, 2, 0, 3, 4 }; - u8 val; - - dprintk ("%s\n", __func__); - - if (p->code_rate_HP < FEC_1_2 || p->code_rate_HP > FEC_7_8) - return -EINVAL; - - if (p->code_rate_LP < FEC_1_2 || p->code_rate_LP > FEC_7_8) - return -EINVAL; - - if (p->code_rate_HP == FEC_4_5 || p->code_rate_LP == FEC_4_5) - return -EINVAL; - - if (p->guard_interval < GUARD_INTERVAL_1_32 || - p->guard_interval > GUARD_INTERVAL_1_4) - return -EINVAL; - - if (p->transmission_mode != TRANSMISSION_MODE_2K && - p->transmission_mode != TRANSMISSION_MODE_8K) - return -EINVAL; - - if (p->modulation != QPSK && - p->modulation != QAM_16 && - p->modulation != QAM_64) - return -EINVAL; - - if (p->hierarchy < HIERARCHY_NONE || - p->hierarchy > HIERARCHY_4) - return -EINVAL; - - if (p->bandwidth_hz > 8000000 || p->bandwidth_hz < 6000000) - return -EINVAL; - - if (p->bandwidth_hz == 7000000) - cx22700_writereg (state, 0x09, cx22700_readreg (state, 0x09 | 0x10)); - else - cx22700_writereg (state, 0x09, cx22700_readreg (state, 0x09 & ~0x10)); - - val = qam_tab[p->modulation - QPSK]; - val |= p->hierarchy - HIERARCHY_NONE; - - cx22700_writereg (state, 0x04, val); - - val = fec_tab[p->code_rate_HP - FEC_1_2] << 3; - val |= fec_tab[p->code_rate_LP - FEC_1_2]; - - cx22700_writereg (state, 0x05, val); - - val = (p->guard_interval - GUARD_INTERVAL_1_32) << 2; - val |= p->transmission_mode - TRANSMISSION_MODE_2K; - - cx22700_writereg (state, 0x06, val); - - cx22700_writereg (state, 0x08, 0x04 | 0x02); /* use user tps parameters */ - cx22700_writereg (state, 0x08, 0x04); /* restart acquisition */ - - return 0; -} - -static int cx22700_get_tps(struct cx22700_state *state, - struct dtv_frontend_properties *p) -{ - static const fe_modulation_t qam_tab [3] = { QPSK, QAM_16, QAM_64 }; - static const fe_code_rate_t fec_tab [5] = { FEC_1_2, FEC_2_3, FEC_3_4, - FEC_5_6, FEC_7_8 }; - u8 val; - - dprintk ("%s\n", __func__); - - if (!(cx22700_readreg(state, 0x07) & 0x20)) /* tps valid? */ - return -EAGAIN; - - val = cx22700_readreg (state, 0x01); - - if ((val & 0x7) > 4) - p->hierarchy = HIERARCHY_AUTO; - else - p->hierarchy = HIERARCHY_NONE + (val & 0x7); - - if (((val >> 3) & 0x3) > 2) - p->modulation = QAM_AUTO; - else - p->modulation = qam_tab[(val >> 3) & 0x3]; - - val = cx22700_readreg (state, 0x02); - - if (((val >> 3) & 0x07) > 4) - p->code_rate_HP = FEC_AUTO; - else - p->code_rate_HP = fec_tab[(val >> 3) & 0x07]; - - if ((val & 0x07) > 4) - p->code_rate_LP = FEC_AUTO; - else - p->code_rate_LP = fec_tab[val & 0x07]; - - val = cx22700_readreg (state, 0x03); - - p->guard_interval = GUARD_INTERVAL_1_32 + ((val >> 6) & 0x3); - p->transmission_mode = TRANSMISSION_MODE_2K + ((val >> 5) & 0x1); - - return 0; -} - -static int cx22700_init (struct dvb_frontend* fe) - -{ struct cx22700_state* state = fe->demodulator_priv; - int i; - - dprintk("cx22700_init: init chip\n"); - - cx22700_writereg (state, 0x00, 0x02); /* soft reset */ - cx22700_writereg (state, 0x00, 0x00); - - msleep(10); - - for (i=0; i<sizeof(init_tab); i+=2) - cx22700_writereg (state, init_tab[i], init_tab[i+1]); - - cx22700_writereg (state, 0x00, 0x01); - - return 0; -} - -static int cx22700_read_status(struct dvb_frontend* fe, fe_status_t* status) -{ - struct cx22700_state* state = fe->demodulator_priv; - - u16 rs_ber = (cx22700_readreg (state, 0x0d) << 9) - | (cx22700_readreg (state, 0x0e) << 1); - u8 sync = cx22700_readreg (state, 0x07); - - *status = 0; - - if (rs_ber < 0xff00) - *status |= FE_HAS_SIGNAL; - - if (sync & 0x20) - *status |= FE_HAS_CARRIER; - - if (sync & 0x10) - *status |= FE_HAS_VITERBI; - - if (sync & 0x10) - *status |= FE_HAS_SYNC; - - if (*status == 0x0f) - *status |= FE_HAS_LOCK; - - return 0; -} - -static int cx22700_read_ber(struct dvb_frontend* fe, u32* ber) -{ - struct cx22700_state* state = fe->demodulator_priv; - - *ber = cx22700_readreg (state, 0x0c) & 0x7f; - cx22700_writereg (state, 0x0c, 0x00); - - return 0; -} - -static int cx22700_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength) -{ - struct cx22700_state* state = fe->demodulator_priv; - - u16 rs_ber = (cx22700_readreg (state, 0x0d) << 9) - | (cx22700_readreg (state, 0x0e) << 1); - *signal_strength = ~rs_ber; - - return 0; -} - -static int cx22700_read_snr(struct dvb_frontend* fe, u16* snr) -{ - struct cx22700_state* state = fe->demodulator_priv; - - u16 rs_ber = (cx22700_readreg (state, 0x0d) << 9) - | (cx22700_readreg (state, 0x0e) << 1); - *snr = ~rs_ber; - - return 0; -} - -static int cx22700_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) -{ - struct cx22700_state* state = fe->demodulator_priv; - - *ucblocks = cx22700_readreg (state, 0x0f); - cx22700_writereg (state, 0x0f, 0x00); - - return 0; -} - -static int cx22700_set_frontend(struct dvb_frontend *fe) -{ - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - struct cx22700_state* state = fe->demodulator_priv; - - cx22700_writereg (state, 0x00, 0x02); /* XXX CHECKME: soft reset*/ - cx22700_writereg (state, 0x00, 0x00); - - 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); - } - - cx22700_set_inversion(state, c->inversion); - cx22700_set_tps(state, c); - cx22700_writereg (state, 0x37, 0x01); /* PAL loop filter off */ - cx22700_writereg (state, 0x00, 0x01); /* restart acquire */ - - return 0; -} - -static int cx22700_get_frontend(struct dvb_frontend *fe) -{ - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - struct cx22700_state* state = fe->demodulator_priv; - u8 reg09 = cx22700_readreg (state, 0x09); - - c->inversion = reg09 & 0x1 ? INVERSION_ON : INVERSION_OFF; - return cx22700_get_tps(state, c); -} - -static int cx22700_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) -{ - struct cx22700_state* state = fe->demodulator_priv; - - if (enable) { - return cx22700_writereg(state, 0x0a, 0x00); - } else { - return cx22700_writereg(state, 0x0a, 0x01); - } -} - -static int cx22700_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings) -{ - fesettings->min_delay_ms = 150; - fesettings->step_size = 166667; - fesettings->max_drift = 166667*2; - return 0; -} - -static void cx22700_release(struct dvb_frontend* fe) -{ - struct cx22700_state* state = fe->demodulator_priv; - kfree(state); -} - -static struct dvb_frontend_ops cx22700_ops; - -struct dvb_frontend* cx22700_attach(const struct cx22700_config* config, - struct i2c_adapter* i2c) -{ - struct cx22700_state* state = NULL; - - /* allocate memory for the internal state */ - state = kzalloc(sizeof(struct cx22700_state), GFP_KERNEL); - if (state == NULL) goto error; - - /* setup the state */ - state->config = config; - state->i2c = i2c; - - /* check if the demod is there */ - if (cx22700_readreg(state, 0x07) < 0) goto error; - - /* create dvb_frontend */ - memcpy(&state->frontend.ops, &cx22700_ops, sizeof(struct dvb_frontend_ops)); - state->frontend.demodulator_priv = state; - return &state->frontend; - -error: - kfree(state); - return NULL; -} - -static struct dvb_frontend_ops cx22700_ops = { - .delsys = { SYS_DVBT }, - .info = { - .name = "Conexant CX22700 DVB-T", - .frequency_min = 470000000, - .frequency_max = 860000000, - .frequency_stepsize = 166667, - .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_RECOVER - }, - - .release = cx22700_release, - - .init = cx22700_init, - .i2c_gate_ctrl = cx22700_i2c_gate_ctrl, - - .set_frontend = cx22700_set_frontend, - .get_frontend = cx22700_get_frontend, - .get_tune_settings = cx22700_get_tune_settings, - - .read_status = cx22700_read_status, - .read_ber = cx22700_read_ber, - .read_signal_strength = cx22700_read_signal_strength, - .read_snr = cx22700_read_snr, - .read_ucblocks = cx22700_read_ucblocks, -}; - -module_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); - -MODULE_DESCRIPTION("Conexant CX22700 DVB-T Demodulator driver"); -MODULE_AUTHOR("Holger Waechtler"); -MODULE_LICENSE("GPL"); - -EXPORT_SYMBOL(cx22700_attach); |