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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
332 lines
6.7 KiB
C
332 lines
6.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* E3C EC100 demodulator driver
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*
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* Copyright (C) 2009 Antti Palosaari <crope@iki.fi>
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*/
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#include <media/dvb_frontend.h>
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#include "ec100.h"
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struct ec100_state {
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struct i2c_adapter *i2c;
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struct dvb_frontend frontend;
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struct ec100_config config;
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u16 ber;
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};
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/* write single register */
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static int ec100_write_reg(struct ec100_state *state, u8 reg, u8 val)
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{
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int ret;
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u8 buf[2] = {reg, val};
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struct i2c_msg msg[1] = {
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{
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.addr = state->config.demod_address,
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.flags = 0,
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.len = sizeof(buf),
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.buf = buf,
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}
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};
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ret = i2c_transfer(state->i2c, msg, 1);
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if (ret == 1) {
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ret = 0;
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} else {
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dev_warn(&state->i2c->dev, "%s: i2c wr failed=%d reg=%02x\n",
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KBUILD_MODNAME, ret, reg);
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ret = -EREMOTEIO;
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}
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return ret;
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}
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/* read single register */
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static int ec100_read_reg(struct ec100_state *state, u8 reg, u8 *val)
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{
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int ret;
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struct i2c_msg msg[2] = {
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{
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.addr = state->config.demod_address,
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.flags = 0,
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.len = 1,
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.buf = ®
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}, {
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.addr = state->config.demod_address,
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.flags = I2C_M_RD,
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.len = 1,
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.buf = val
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}
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};
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ret = i2c_transfer(state->i2c, msg, 2);
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if (ret == 2) {
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ret = 0;
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} else {
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dev_warn(&state->i2c->dev, "%s: i2c rd failed=%d reg=%02x\n",
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KBUILD_MODNAME, ret, reg);
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ret = -EREMOTEIO;
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}
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return ret;
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}
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static int ec100_set_frontend(struct dvb_frontend *fe)
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{
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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struct ec100_state *state = fe->demodulator_priv;
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int ret;
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u8 tmp, tmp2;
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dev_dbg(&state->i2c->dev, "%s: frequency=%d bandwidth_hz=%d\n",
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__func__, c->frequency, c->bandwidth_hz);
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/* program tuner */
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if (fe->ops.tuner_ops.set_params)
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fe->ops.tuner_ops.set_params(fe);
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ret = ec100_write_reg(state, 0x04, 0x06);
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x67, 0x58);
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x05, 0x18);
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if (ret)
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goto error;
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/* reg/bw | 6 | 7 | 8
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-------+------+------+------
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A 0x1b | 0xa1 | 0xe7 | 0x2c
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A 0x1c | 0x55 | 0x63 | 0x72
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-------+------+------+------
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B 0x1b | 0xb7 | 0x00 | 0x49
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B 0x1c | 0x55 | 0x64 | 0x72 */
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switch (c->bandwidth_hz) {
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case 6000000:
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tmp = 0xb7;
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tmp2 = 0x55;
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break;
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case 7000000:
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tmp = 0x00;
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tmp2 = 0x64;
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break;
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case 8000000:
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default:
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tmp = 0x49;
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tmp2 = 0x72;
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}
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ret = ec100_write_reg(state, 0x1b, tmp);
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x1c, tmp2);
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x0c, 0xbb); /* if freq */
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x0d, 0x31); /* if freq */
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x08, 0x24);
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x00, 0x00); /* go */
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if (ret)
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goto error;
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ret = ec100_write_reg(state, 0x00, 0x20); /* go */
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if (ret)
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goto error;
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return ret;
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error:
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dev_dbg(&state->i2c->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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static int ec100_get_tune_settings(struct dvb_frontend *fe,
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struct dvb_frontend_tune_settings *fesettings)
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{
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fesettings->min_delay_ms = 300;
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fesettings->step_size = 0;
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fesettings->max_drift = 0;
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return 0;
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}
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static int ec100_read_status(struct dvb_frontend *fe, enum fe_status *status)
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{
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struct ec100_state *state = fe->demodulator_priv;
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int ret;
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u8 tmp;
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*status = 0;
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ret = ec100_read_reg(state, 0x42, &tmp);
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if (ret)
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goto error;
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if (tmp & 0x80) {
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/* bit7 set - have lock */
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*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
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FE_HAS_SYNC | FE_HAS_LOCK;
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} else {
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ret = ec100_read_reg(state, 0x01, &tmp);
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if (ret)
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goto error;
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if (tmp & 0x10) {
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/* bit4 set - have signal */
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*status |= FE_HAS_SIGNAL;
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if (!(tmp & 0x01)) {
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/* bit0 clear - have ~valid signal */
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*status |= FE_HAS_CARRIER | FE_HAS_VITERBI;
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}
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}
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}
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return ret;
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error:
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dev_dbg(&state->i2c->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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static int ec100_read_ber(struct dvb_frontend *fe, u32 *ber)
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{
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struct ec100_state *state = fe->demodulator_priv;
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int ret;
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u8 tmp, tmp2;
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u16 ber2;
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*ber = 0;
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ret = ec100_read_reg(state, 0x65, &tmp);
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if (ret)
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goto error;
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ret = ec100_read_reg(state, 0x66, &tmp2);
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if (ret)
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goto error;
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ber2 = (tmp2 << 8) | tmp;
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/* if counter overflow or clear */
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if (ber2 < state->ber)
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*ber = ber2;
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else
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*ber = ber2 - state->ber;
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state->ber = ber2;
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return ret;
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error:
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dev_dbg(&state->i2c->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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static int ec100_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
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{
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struct ec100_state *state = fe->demodulator_priv;
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int ret;
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u8 tmp;
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ret = ec100_read_reg(state, 0x24, &tmp);
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if (ret) {
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*strength = 0;
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goto error;
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}
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*strength = ((tmp << 8) | tmp);
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return ret;
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error:
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dev_dbg(&state->i2c->dev, "%s: failed=%d\n", __func__, ret);
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return ret;
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}
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static int ec100_read_snr(struct dvb_frontend *fe, u16 *snr)
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{
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*snr = 0;
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return 0;
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}
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static int ec100_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
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{
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*ucblocks = 0;
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return 0;
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}
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static void ec100_release(struct dvb_frontend *fe)
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{
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struct ec100_state *state = fe->demodulator_priv;
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kfree(state);
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}
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static const struct dvb_frontend_ops ec100_ops;
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struct dvb_frontend *ec100_attach(const struct ec100_config *config,
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struct i2c_adapter *i2c)
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{
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int ret;
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struct ec100_state *state = NULL;
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u8 tmp;
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/* allocate memory for the internal state */
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state = kzalloc_obj(struct ec100_state);
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if (state == NULL)
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goto error;
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/* setup the state */
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state->i2c = i2c;
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memcpy(&state->config, config, sizeof(struct ec100_config));
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/* check if the demod is there */
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ret = ec100_read_reg(state, 0x33, &tmp);
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if (ret || tmp != 0x0b)
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goto error;
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/* create dvb_frontend */
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memcpy(&state->frontend.ops, &ec100_ops,
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sizeof(struct dvb_frontend_ops));
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state->frontend.demodulator_priv = state;
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return &state->frontend;
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error:
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kfree(state);
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return NULL;
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}
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EXPORT_SYMBOL_GPL(ec100_attach);
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static const struct dvb_frontend_ops ec100_ops = {
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.delsys = { SYS_DVBT },
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.info = {
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.name = "E3C EC100 DVB-T",
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.caps =
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FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
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FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
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FE_CAN_QPSK | FE_CAN_QAM_16 |
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FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
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FE_CAN_TRANSMISSION_MODE_AUTO |
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FE_CAN_GUARD_INTERVAL_AUTO |
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FE_CAN_HIERARCHY_AUTO |
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FE_CAN_MUTE_TS
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},
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.release = ec100_release,
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.set_frontend = ec100_set_frontend,
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.get_tune_settings = ec100_get_tune_settings,
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.read_status = ec100_read_status,
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.read_ber = ec100_read_ber,
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.read_signal_strength = ec100_read_signal_strength,
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.read_snr = ec100_read_snr,
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.read_ucblocks = ec100_read_ucblocks,
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};
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MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
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MODULE_DESCRIPTION("E3C EC100 DVB-T demodulator driver");
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MODULE_LICENSE("GPL");
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