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901 lines
20 KiB
901 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Realtek RTL2830 DVB-T demodulator driver |
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* |
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* Copyright (C) 2011 Antti Palosaari <[email protected]> |
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*/ |
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|
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#include "rtl2830_priv.h" |
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|
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/* Our regmap is bypassing I2C adapter lock, thus we do it! */ |
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static int rtl2830_bulk_write(struct i2c_client *client, unsigned int reg, |
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const void *val, size_t val_count) |
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{ |
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struct rtl2830_dev *dev = i2c_get_clientdata(client); |
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int ret; |
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i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); |
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ret = regmap_bulk_write(dev->regmap, reg, val, val_count); |
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i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); |
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return ret; |
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} |
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static int rtl2830_update_bits(struct i2c_client *client, unsigned int reg, |
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unsigned int mask, unsigned int val) |
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{ |
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struct rtl2830_dev *dev = i2c_get_clientdata(client); |
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int ret; |
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i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); |
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ret = regmap_update_bits(dev->regmap, reg, mask, val); |
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i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); |
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return ret; |
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} |
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static int rtl2830_bulk_read(struct i2c_client *client, unsigned int reg, |
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void *val, size_t val_count) |
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{ |
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struct rtl2830_dev *dev = i2c_get_clientdata(client); |
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int ret; |
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i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT); |
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ret = regmap_bulk_read(dev->regmap, reg, val, val_count); |
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i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT); |
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return ret; |
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} |
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static int rtl2830_init(struct dvb_frontend *fe) |
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{ |
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struct i2c_client *client = fe->demodulator_priv; |
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struct rtl2830_dev *dev = i2c_get_clientdata(client); |
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struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache; |
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int ret, i; |
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struct rtl2830_reg_val_mask tab[] = { |
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{0x00d, 0x01, 0x03}, |
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{0x00d, 0x10, 0x10}, |
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{0x104, 0x00, 0x1e}, |
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{0x105, 0x80, 0x80}, |
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{0x110, 0x02, 0x03}, |
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{0x110, 0x08, 0x0c}, |
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{0x17b, 0x00, 0x40}, |
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{0x17d, 0x05, 0x0f}, |
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{0x17d, 0x50, 0xf0}, |
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{0x18c, 0x08, 0x0f}, |
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{0x18d, 0x00, 0xc0}, |
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{0x188, 0x05, 0x0f}, |
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{0x189, 0x00, 0xfc}, |
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{0x2d5, 0x02, 0x02}, |
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{0x2f1, 0x02, 0x06}, |
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{0x2f1, 0x20, 0xf8}, |
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{0x16d, 0x00, 0x01}, |
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{0x1a6, 0x00, 0x80}, |
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{0x106, dev->pdata->vtop, 0x3f}, |
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{0x107, dev->pdata->krf, 0x3f}, |
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{0x112, 0x28, 0xff}, |
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{0x103, dev->pdata->agc_targ_val, 0xff}, |
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{0x00a, 0x02, 0x07}, |
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{0x140, 0x0c, 0x3c}, |
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{0x140, 0x40, 0xc0}, |
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{0x15b, 0x05, 0x07}, |
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{0x15b, 0x28, 0x38}, |
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{0x15c, 0x05, 0x07}, |
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{0x15c, 0x28, 0x38}, |
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{0x115, dev->pdata->spec_inv, 0x01}, |
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{0x16f, 0x01, 0x07}, |
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{0x170, 0x18, 0x38}, |
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{0x172, 0x0f, 0x0f}, |
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{0x173, 0x08, 0x38}, |
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{0x175, 0x01, 0x07}, |
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{0x176, 0x00, 0xc0}, |
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}; |
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for (i = 0; i < ARRAY_SIZE(tab); i++) { |
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ret = rtl2830_update_bits(client, tab[i].reg, tab[i].mask, |
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tab[i].val); |
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if (ret) |
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goto err; |
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} |
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ret = rtl2830_bulk_write(client, 0x18f, "\x28\x00", 2); |
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if (ret) |
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goto err; |
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ret = rtl2830_bulk_write(client, 0x195, |
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"\x04\x06\x0a\x12\x0a\x12\x1e\x28", 8); |
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if (ret) |
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goto err; |
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/* TODO: spec init */ |
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/* soft reset */ |
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ret = rtl2830_update_bits(client, 0x101, 0x04, 0x04); |
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if (ret) |
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goto err; |
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ret = rtl2830_update_bits(client, 0x101, 0x04, 0x00); |
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if (ret) |
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goto err; |
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/* init stats here in order signal app which stats are supported */ |
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c->strength.len = 1; |
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c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
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c->cnr.len = 1; |
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c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
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c->post_bit_error.len = 1; |
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c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
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c->post_bit_count.len = 1; |
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c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
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dev->sleeping = false; |
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return ret; |
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err: |
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dev_dbg(&client->dev, "failed=%d\n", ret); |
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return ret; |
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} |
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static int rtl2830_sleep(struct dvb_frontend *fe) |
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{ |
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struct i2c_client *client = fe->demodulator_priv; |
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struct rtl2830_dev *dev = i2c_get_clientdata(client); |
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dev->sleeping = true; |
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dev->fe_status = 0; |
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return 0; |
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} |
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static int rtl2830_get_tune_settings(struct dvb_frontend *fe, |
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struct dvb_frontend_tune_settings *s) |
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{ |
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s->min_delay_ms = 500; |
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s->step_size = fe->ops.info.frequency_stepsize_hz * 2; |
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s->max_drift = (fe->ops.info.frequency_stepsize_hz * 2) + 1; |
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return 0; |
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} |
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static int rtl2830_set_frontend(struct dvb_frontend *fe) |
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{ |
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struct i2c_client *client = fe->demodulator_priv; |
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struct rtl2830_dev *dev = i2c_get_clientdata(client); |
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struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
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int ret, i; |
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u64 num; |
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u8 buf[3], u8tmp; |
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u32 if_ctl, if_frequency; |
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static const u8 bw_params1[3][34] = { |
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{ |
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0x1f, 0xf0, 0x1f, 0xf0, 0x1f, 0xfa, 0x00, 0x17, 0x00, 0x41, |
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0x00, 0x64, 0x00, 0x67, 0x00, 0x38, 0x1f, 0xde, 0x1f, 0x7a, |
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0x1f, 0x47, 0x1f, 0x7c, 0x00, 0x30, 0x01, 0x4b, 0x02, 0x82, |
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0x03, 0x73, 0x03, 0xcf, /* 6 MHz */ |
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}, { |
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0x1f, 0xfa, 0x1f, 0xda, 0x1f, 0xc1, 0x1f, 0xb3, 0x1f, 0xca, |
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0x00, 0x07, 0x00, 0x4d, 0x00, 0x6d, 0x00, 0x40, 0x1f, 0xca, |
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0x1f, 0x4d, 0x1f, 0x2a, 0x1f, 0xb2, 0x00, 0xec, 0x02, 0x7e, |
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0x03, 0xd0, 0x04, 0x53, /* 7 MHz */ |
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}, { |
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0x00, 0x10, 0x00, 0x0e, 0x1f, 0xf7, 0x1f, 0xc9, 0x1f, 0xa0, |
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0x1f, 0xa6, 0x1f, 0xec, 0x00, 0x4e, 0x00, 0x7d, 0x00, 0x3a, |
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0x1f, 0x98, 0x1f, 0x10, 0x1f, 0x40, 0x00, 0x75, 0x02, 0x5f, |
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0x04, 0x24, 0x04, 0xdb, /* 8 MHz */ |
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}, |
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}; |
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static const u8 bw_params2[3][6] = { |
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{0xc3, 0x0c, 0x44, 0x33, 0x33, 0x30}, /* 6 MHz */ |
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{0xb8, 0xe3, 0x93, 0x99, 0x99, 0x98}, /* 7 MHz */ |
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{0xae, 0xba, 0xf3, 0x26, 0x66, 0x64}, /* 8 MHz */ |
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}; |
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dev_dbg(&client->dev, "frequency=%u bandwidth_hz=%u inversion=%u\n", |
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c->frequency, c->bandwidth_hz, c->inversion); |
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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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switch (c->bandwidth_hz) { |
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case 6000000: |
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i = 0; |
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break; |
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case 7000000: |
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i = 1; |
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break; |
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case 8000000: |
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i = 2; |
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break; |
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default: |
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dev_err(&client->dev, "invalid bandwidth_hz %u\n", |
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c->bandwidth_hz); |
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return -EINVAL; |
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} |
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ret = rtl2830_update_bits(client, 0x008, 0x06, i << 1); |
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if (ret) |
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goto err; |
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/* program if frequency */ |
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if (fe->ops.tuner_ops.get_if_frequency) |
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ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency); |
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else |
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ret = -EINVAL; |
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if (ret) |
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goto err; |
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num = if_frequency % dev->pdata->clk; |
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num *= 0x400000; |
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num = div_u64(num, dev->pdata->clk); |
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num = -num; |
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if_ctl = num & 0x3fffff; |
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dev_dbg(&client->dev, "if_frequency=%d if_ctl=%08x\n", |
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if_frequency, if_ctl); |
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buf[0] = (if_ctl >> 16) & 0x3f; |
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buf[1] = (if_ctl >> 8) & 0xff; |
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buf[2] = (if_ctl >> 0) & 0xff; |
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ret = rtl2830_bulk_read(client, 0x119, &u8tmp, 1); |
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if (ret) |
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goto err; |
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buf[0] |= u8tmp & 0xc0; /* [7:6] */ |
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ret = rtl2830_bulk_write(client, 0x119, buf, 3); |
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if (ret) |
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goto err; |
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/* 1/2 split I2C write */ |
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ret = rtl2830_bulk_write(client, 0x11c, &bw_params1[i][0], 17); |
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if (ret) |
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goto err; |
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/* 2/2 split I2C write */ |
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ret = rtl2830_bulk_write(client, 0x12d, &bw_params1[i][17], 17); |
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if (ret) |
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goto err; |
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ret = rtl2830_bulk_write(client, 0x19d, bw_params2[i], 6); |
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if (ret) |
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goto err; |
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return ret; |
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err: |
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dev_dbg(&client->dev, "failed=%d\n", ret); |
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return ret; |
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} |
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static int rtl2830_get_frontend(struct dvb_frontend *fe, |
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struct dtv_frontend_properties *c) |
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{ |
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struct i2c_client *client = fe->demodulator_priv; |
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struct rtl2830_dev *dev = i2c_get_clientdata(client); |
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int ret; |
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u8 buf[3]; |
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if (dev->sleeping) |
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return 0; |
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ret = rtl2830_bulk_read(client, 0x33c, buf, 2); |
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if (ret) |
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goto err; |
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ret = rtl2830_bulk_read(client, 0x351, &buf[2], 1); |
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if (ret) |
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goto err; |
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dev_dbg(&client->dev, "TPS=%*ph\n", 3, buf); |
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switch ((buf[0] >> 2) & 3) { |
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case 0: |
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c->modulation = QPSK; |
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break; |
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case 1: |
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c->modulation = QAM_16; |
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break; |
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case 2: |
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c->modulation = QAM_64; |
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break; |
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} |
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switch ((buf[2] >> 2) & 1) { |
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case 0: |
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c->transmission_mode = TRANSMISSION_MODE_2K; |
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break; |
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case 1: |
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c->transmission_mode = TRANSMISSION_MODE_8K; |
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} |
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switch ((buf[2] >> 0) & 3) { |
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case 0: |
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c->guard_interval = GUARD_INTERVAL_1_32; |
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break; |
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case 1: |
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c->guard_interval = GUARD_INTERVAL_1_16; |
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break; |
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case 2: |
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c->guard_interval = GUARD_INTERVAL_1_8; |
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break; |
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case 3: |
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c->guard_interval = GUARD_INTERVAL_1_4; |
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break; |
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} |
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switch ((buf[0] >> 4) & 7) { |
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case 0: |
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c->hierarchy = HIERARCHY_NONE; |
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break; |
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case 1: |
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c->hierarchy = HIERARCHY_1; |
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break; |
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case 2: |
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c->hierarchy = HIERARCHY_2; |
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break; |
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case 3: |
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c->hierarchy = HIERARCHY_4; |
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break; |
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} |
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switch ((buf[1] >> 3) & 7) { |
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case 0: |
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c->code_rate_HP = FEC_1_2; |
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break; |
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case 1: |
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c->code_rate_HP = FEC_2_3; |
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break; |
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case 2: |
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c->code_rate_HP = FEC_3_4; |
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break; |
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case 3: |
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c->code_rate_HP = FEC_5_6; |
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break; |
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case 4: |
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c->code_rate_HP = FEC_7_8; |
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break; |
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} |
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switch ((buf[1] >> 0) & 7) { |
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case 0: |
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c->code_rate_LP = FEC_1_2; |
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break; |
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case 1: |
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c->code_rate_LP = FEC_2_3; |
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break; |
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case 2: |
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c->code_rate_LP = FEC_3_4; |
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break; |
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case 3: |
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c->code_rate_LP = FEC_5_6; |
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break; |
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case 4: |
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c->code_rate_LP = FEC_7_8; |
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break; |
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} |
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return 0; |
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err: |
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dev_dbg(&client->dev, "failed=%d\n", ret); |
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return ret; |
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} |
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static int rtl2830_read_status(struct dvb_frontend *fe, enum fe_status *status) |
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{ |
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struct i2c_client *client = fe->demodulator_priv; |
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struct rtl2830_dev *dev = i2c_get_clientdata(client); |
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struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache; |
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int ret, stmp; |
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unsigned int utmp; |
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u8 u8tmp, buf[2]; |
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*status = 0; |
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if (dev->sleeping) |
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return 0; |
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ret = rtl2830_bulk_read(client, 0x351, &u8tmp, 1); |
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if (ret) |
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goto err; |
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u8tmp = (u8tmp >> 3) & 0x0f; /* [6:3] */ |
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if (u8tmp == 11) { |
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*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | |
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FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; |
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} else if (u8tmp == 10) { |
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*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | |
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FE_HAS_VITERBI; |
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} |
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dev->fe_status = *status; |
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/* Signal strength */ |
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if (dev->fe_status & FE_HAS_SIGNAL) { |
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/* Read IF AGC */ |
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ret = rtl2830_bulk_read(client, 0x359, buf, 2); |
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if (ret) |
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goto err; |
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stmp = buf[0] << 8 | buf[1] << 0; |
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stmp = sign_extend32(stmp, 13); |
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utmp = clamp_val(-4 * stmp + 32767, 0x0000, 0xffff); |
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dev_dbg(&client->dev, "IF AGC=%d\n", stmp); |
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c->strength.stat[0].scale = FE_SCALE_RELATIVE; |
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c->strength.stat[0].uvalue = utmp; |
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} else { |
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c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
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} |
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|
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/* CNR */ |
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if (dev->fe_status & FE_HAS_VITERBI) { |
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unsigned int hierarchy, constellation; |
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#define CONSTELLATION_NUM 3 |
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#define HIERARCHY_NUM 4 |
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static const u32 constant[CONSTELLATION_NUM][HIERARCHY_NUM] = { |
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{70705899, 70705899, 70705899, 70705899}, |
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{82433173, 82433173, 87483115, 94445660}, |
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{92888734, 92888734, 95487525, 99770748}, |
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}; |
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ret = rtl2830_bulk_read(client, 0x33c, &u8tmp, 1); |
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if (ret) |
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goto err; |
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constellation = (u8tmp >> 2) & 0x03; /* [3:2] */ |
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if (constellation > CONSTELLATION_NUM - 1) |
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goto err; |
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hierarchy = (u8tmp >> 4) & 0x07; /* [6:4] */ |
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if (hierarchy > HIERARCHY_NUM - 1) |
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goto err; |
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ret = rtl2830_bulk_read(client, 0x40c, buf, 2); |
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if (ret) |
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goto err; |
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utmp = buf[0] << 8 | buf[1] << 0; |
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if (utmp) |
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stmp = (constant[constellation][hierarchy] - |
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intlog10(utmp)) / ((1 << 24) / 10000); |
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else |
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stmp = 0; |
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dev_dbg(&client->dev, "CNR raw=%u\n", utmp); |
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|
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c->cnr.stat[0].scale = FE_SCALE_DECIBEL; |
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c->cnr.stat[0].svalue = stmp; |
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} else { |
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c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
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} |
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|
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/* BER */ |
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if (dev->fe_status & FE_HAS_LOCK) { |
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ret = rtl2830_bulk_read(client, 0x34e, buf, 2); |
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if (ret) |
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goto err; |
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|
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utmp = buf[0] << 8 | buf[1] << 0; |
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dev->post_bit_error += utmp; |
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dev->post_bit_count += 1000000; |
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|
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dev_dbg(&client->dev, "BER errors=%u total=1000000\n", utmp); |
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|
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c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; |
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c->post_bit_error.stat[0].uvalue = dev->post_bit_error; |
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c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER; |
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c->post_bit_count.stat[0].uvalue = dev->post_bit_count; |
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} else { |
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c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
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c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; |
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} |
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return ret; |
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err: |
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dev_dbg(&client->dev, "failed=%d\n", ret); |
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return ret; |
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} |
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|
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static int rtl2830_read_snr(struct dvb_frontend *fe, u16 *snr) |
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{ |
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struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
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|
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if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL) |
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*snr = div_s64(c->cnr.stat[0].svalue, 100); |
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else |
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*snr = 0; |
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|
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return 0; |
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} |
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|
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static int rtl2830_read_ber(struct dvb_frontend *fe, u32 *ber) |
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{ |
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struct i2c_client *client = fe->demodulator_priv; |
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struct rtl2830_dev *dev = i2c_get_clientdata(client); |
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|
|
*ber = (dev->post_bit_error - dev->post_bit_error_prev); |
|
dev->post_bit_error_prev = dev->post_bit_error; |
|
|
|
return 0; |
|
} |
|
|
|
static int rtl2830_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) |
|
{ |
|
*ucblocks = 0; |
|
|
|
return 0; |
|
} |
|
|
|
static int rtl2830_read_signal_strength(struct dvb_frontend *fe, u16 *strength) |
|
{ |
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
|
|
|
if (c->strength.stat[0].scale == FE_SCALE_RELATIVE) |
|
*strength = c->strength.stat[0].uvalue; |
|
else |
|
*strength = 0; |
|
|
|
return 0; |
|
} |
|
|
|
static const struct dvb_frontend_ops rtl2830_ops = { |
|
.delsys = {SYS_DVBT}, |
|
.info = { |
|
.name = "Realtek RTL2830 (DVB-T)", |
|
.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 |
|
}, |
|
|
|
.init = rtl2830_init, |
|
.sleep = rtl2830_sleep, |
|
|
|
.get_tune_settings = rtl2830_get_tune_settings, |
|
|
|
.set_frontend = rtl2830_set_frontend, |
|
.get_frontend = rtl2830_get_frontend, |
|
|
|
.read_status = rtl2830_read_status, |
|
.read_snr = rtl2830_read_snr, |
|
.read_ber = rtl2830_read_ber, |
|
.read_ucblocks = rtl2830_read_ucblocks, |
|
.read_signal_strength = rtl2830_read_signal_strength, |
|
}; |
|
|
|
static int rtl2830_pid_filter_ctrl(struct dvb_frontend *fe, int onoff) |
|
{ |
|
struct i2c_client *client = fe->demodulator_priv; |
|
int ret; |
|
u8 u8tmp; |
|
|
|
dev_dbg(&client->dev, "onoff=%d\n", onoff); |
|
|
|
/* enable / disable PID filter */ |
|
if (onoff) |
|
u8tmp = 0x80; |
|
else |
|
u8tmp = 0x00; |
|
|
|
ret = rtl2830_update_bits(client, 0x061, 0x80, u8tmp); |
|
if (ret) |
|
goto err; |
|
|
|
return 0; |
|
err: |
|
dev_dbg(&client->dev, "failed=%d\n", ret); |
|
return ret; |
|
} |
|
|
|
static int rtl2830_pid_filter(struct dvb_frontend *fe, u8 index, u16 pid, int onoff) |
|
{ |
|
struct i2c_client *client = fe->demodulator_priv; |
|
struct rtl2830_dev *dev = i2c_get_clientdata(client); |
|
int ret; |
|
u8 buf[4]; |
|
|
|
dev_dbg(&client->dev, "index=%d pid=%04x onoff=%d\n", |
|
index, pid, onoff); |
|
|
|
/* skip invalid PIDs (0x2000) */ |
|
if (pid > 0x1fff || index > 32) |
|
return 0; |
|
|
|
if (onoff) |
|
set_bit(index, &dev->filters); |
|
else |
|
clear_bit(index, &dev->filters); |
|
|
|
/* enable / disable PIDs */ |
|
buf[0] = (dev->filters >> 0) & 0xff; |
|
buf[1] = (dev->filters >> 8) & 0xff; |
|
buf[2] = (dev->filters >> 16) & 0xff; |
|
buf[3] = (dev->filters >> 24) & 0xff; |
|
ret = rtl2830_bulk_write(client, 0x062, buf, 4); |
|
if (ret) |
|
goto err; |
|
|
|
/* add PID */ |
|
buf[0] = (pid >> 8) & 0xff; |
|
buf[1] = (pid >> 0) & 0xff; |
|
ret = rtl2830_bulk_write(client, 0x066 + 2 * index, buf, 2); |
|
if (ret) |
|
goto err; |
|
|
|
return 0; |
|
err: |
|
dev_dbg(&client->dev, "failed=%d\n", ret); |
|
return ret; |
|
} |
|
|
|
/* |
|
* I2C gate/mux/repeater logic |
|
* We must use unlocked __i2c_transfer() here (through regmap) because of I2C |
|
* adapter lock is already taken by tuner driver. |
|
* Gate is closed automatically after single I2C transfer. |
|
*/ |
|
static int rtl2830_select(struct i2c_mux_core *muxc, u32 chan_id) |
|
{ |
|
struct i2c_client *client = i2c_mux_priv(muxc); |
|
struct rtl2830_dev *dev = i2c_get_clientdata(client); |
|
int ret; |
|
|
|
dev_dbg(&client->dev, "\n"); |
|
|
|
/* open I2C repeater for 1 transfer, closes automatically */ |
|
/* XXX: regmap_update_bits() does not lock I2C adapter */ |
|
ret = regmap_update_bits(dev->regmap, 0x101, 0x08, 0x08); |
|
if (ret) |
|
goto err; |
|
|
|
return 0; |
|
err: |
|
dev_dbg(&client->dev, "failed=%d\n", ret); |
|
return ret; |
|
} |
|
|
|
static struct dvb_frontend *rtl2830_get_dvb_frontend(struct i2c_client *client) |
|
{ |
|
struct rtl2830_dev *dev = i2c_get_clientdata(client); |
|
|
|
dev_dbg(&client->dev, "\n"); |
|
|
|
return &dev->fe; |
|
} |
|
|
|
static struct i2c_adapter *rtl2830_get_i2c_adapter(struct i2c_client *client) |
|
{ |
|
struct rtl2830_dev *dev = i2c_get_clientdata(client); |
|
|
|
dev_dbg(&client->dev, "\n"); |
|
|
|
return dev->muxc->adapter[0]; |
|
} |
|
|
|
/* |
|
* We implement own I2C access routines for regmap in order to get manual access |
|
* to I2C adapter lock, which is needed for I2C mux adapter. |
|
*/ |
|
static int rtl2830_regmap_read(void *context, const void *reg_buf, |
|
size_t reg_size, void *val_buf, size_t val_size) |
|
{ |
|
struct i2c_client *client = context; |
|
int ret; |
|
struct i2c_msg msg[2] = { |
|
{ |
|
.addr = client->addr, |
|
.flags = 0, |
|
.len = reg_size, |
|
.buf = (u8 *)reg_buf, |
|
}, { |
|
.addr = client->addr, |
|
.flags = I2C_M_RD, |
|
.len = val_size, |
|
.buf = val_buf, |
|
} |
|
}; |
|
|
|
ret = __i2c_transfer(client->adapter, msg, 2); |
|
if (ret != 2) { |
|
dev_warn(&client->dev, "i2c reg read failed %d\n", ret); |
|
if (ret >= 0) |
|
ret = -EREMOTEIO; |
|
return ret; |
|
} |
|
return 0; |
|
} |
|
|
|
static int rtl2830_regmap_write(void *context, const void *data, size_t count) |
|
{ |
|
struct i2c_client *client = context; |
|
int ret; |
|
struct i2c_msg msg[1] = { |
|
{ |
|
.addr = client->addr, |
|
.flags = 0, |
|
.len = count, |
|
.buf = (u8 *)data, |
|
} |
|
}; |
|
|
|
ret = __i2c_transfer(client->adapter, msg, 1); |
|
if (ret != 1) { |
|
dev_warn(&client->dev, "i2c reg write failed %d\n", ret); |
|
if (ret >= 0) |
|
ret = -EREMOTEIO; |
|
return ret; |
|
} |
|
return 0; |
|
} |
|
|
|
static int rtl2830_regmap_gather_write(void *context, const void *reg, |
|
size_t reg_len, const void *val, |
|
size_t val_len) |
|
{ |
|
struct i2c_client *client = context; |
|
int ret; |
|
u8 buf[256]; |
|
struct i2c_msg msg[1] = { |
|
{ |
|
.addr = client->addr, |
|
.flags = 0, |
|
.len = 1 + val_len, |
|
.buf = buf, |
|
} |
|
}; |
|
|
|
buf[0] = *(u8 const *)reg; |
|
memcpy(&buf[1], val, val_len); |
|
|
|
ret = __i2c_transfer(client->adapter, msg, 1); |
|
if (ret != 1) { |
|
dev_warn(&client->dev, "i2c reg write failed %d\n", ret); |
|
if (ret >= 0) |
|
ret = -EREMOTEIO; |
|
return ret; |
|
} |
|
return 0; |
|
} |
|
|
|
static int rtl2830_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
struct rtl2830_platform_data *pdata = client->dev.platform_data; |
|
struct rtl2830_dev *dev; |
|
int ret; |
|
u8 u8tmp; |
|
static const struct regmap_bus regmap_bus = { |
|
.read = rtl2830_regmap_read, |
|
.write = rtl2830_regmap_write, |
|
.gather_write = rtl2830_regmap_gather_write, |
|
.val_format_endian_default = REGMAP_ENDIAN_NATIVE, |
|
}; |
|
static const struct regmap_range_cfg regmap_range_cfg[] = { |
|
{ |
|
.selector_reg = 0x00, |
|
.selector_mask = 0xff, |
|
.selector_shift = 0, |
|
.window_start = 0, |
|
.window_len = 0x100, |
|
.range_min = 0 * 0x100, |
|
.range_max = 5 * 0x100, |
|
}, |
|
}; |
|
static const struct regmap_config regmap_config = { |
|
.reg_bits = 8, |
|
.val_bits = 8, |
|
.max_register = 5 * 0x100, |
|
.ranges = regmap_range_cfg, |
|
.num_ranges = ARRAY_SIZE(regmap_range_cfg), |
|
}; |
|
|
|
dev_dbg(&client->dev, "\n"); |
|
|
|
if (pdata == NULL) { |
|
ret = -EINVAL; |
|
goto err; |
|
} |
|
|
|
/* allocate memory for the internal state */ |
|
dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
|
if (dev == NULL) { |
|
ret = -ENOMEM; |
|
goto err; |
|
} |
|
|
|
/* setup the state */ |
|
i2c_set_clientdata(client, dev); |
|
dev->client = client; |
|
dev->pdata = client->dev.platform_data; |
|
dev->sleeping = true; |
|
dev->regmap = regmap_init(&client->dev, ®map_bus, client, |
|
®map_config); |
|
if (IS_ERR(dev->regmap)) { |
|
ret = PTR_ERR(dev->regmap); |
|
goto err_kfree; |
|
} |
|
|
|
/* check if the demod is there */ |
|
ret = rtl2830_bulk_read(client, 0x000, &u8tmp, 1); |
|
if (ret) |
|
goto err_regmap_exit; |
|
|
|
/* create muxed i2c adapter for tuner */ |
|
dev->muxc = i2c_mux_alloc(client->adapter, &client->dev, 1, 0, 0, |
|
rtl2830_select, NULL); |
|
if (!dev->muxc) { |
|
ret = -ENOMEM; |
|
goto err_regmap_exit; |
|
} |
|
dev->muxc->priv = client; |
|
ret = i2c_mux_add_adapter(dev->muxc, 0, 0, 0); |
|
if (ret) |
|
goto err_regmap_exit; |
|
|
|
/* create dvb frontend */ |
|
memcpy(&dev->fe.ops, &rtl2830_ops, sizeof(dev->fe.ops)); |
|
dev->fe.demodulator_priv = client; |
|
|
|
/* setup callbacks */ |
|
pdata->get_dvb_frontend = rtl2830_get_dvb_frontend; |
|
pdata->get_i2c_adapter = rtl2830_get_i2c_adapter; |
|
pdata->pid_filter = rtl2830_pid_filter; |
|
pdata->pid_filter_ctrl = rtl2830_pid_filter_ctrl; |
|
|
|
dev_info(&client->dev, "Realtek RTL2830 successfully attached\n"); |
|
|
|
return 0; |
|
err_regmap_exit: |
|
regmap_exit(dev->regmap); |
|
err_kfree: |
|
kfree(dev); |
|
err: |
|
dev_dbg(&client->dev, "failed=%d\n", ret); |
|
return ret; |
|
} |
|
|
|
static int rtl2830_remove(struct i2c_client *client) |
|
{ |
|
struct rtl2830_dev *dev = i2c_get_clientdata(client); |
|
|
|
dev_dbg(&client->dev, "\n"); |
|
|
|
i2c_mux_del_adapters(dev->muxc); |
|
regmap_exit(dev->regmap); |
|
kfree(dev); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct i2c_device_id rtl2830_id_table[] = { |
|
{"rtl2830", 0}, |
|
{} |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, rtl2830_id_table); |
|
|
|
static struct i2c_driver rtl2830_driver = { |
|
.driver = { |
|
.name = "rtl2830", |
|
.suppress_bind_attrs = true, |
|
}, |
|
.probe = rtl2830_probe, |
|
.remove = rtl2830_remove, |
|
.id_table = rtl2830_id_table, |
|
}; |
|
|
|
module_i2c_driver(rtl2830_driver); |
|
|
|
MODULE_AUTHOR("Antti Palosaari <[email protected]>"); |
|
MODULE_DESCRIPTION("Realtek RTL2830 DVB-T demodulator driver"); |
|
MODULE_LICENSE("GPL");
|
|
|