![Max Kellermann](/assets/img/avatar_default.png)
These are immutable. Making them "const" allows the compiler to move them to the "rodata" section. Note that cxd2841er_t_c_ops cannot be made "const", because cxd2841er_attach() modifies it. Ouch! [mchehab@s-opensource.com: fix merge conflicts] Signed-off-by: Max Kellermann <max.kellermann@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
912 lines
21 KiB
C
912 lines
21 KiB
C
/*
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* Realtek RTL2830 DVB-T demodulator driver
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*
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* Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include "rtl2830_priv.h"
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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_adapter(client->adapter);
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ret = regmap_bulk_write(dev->regmap, reg, val, val_count);
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i2c_unlock_adapter(client->adapter);
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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_adapter(client->adapter);
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ret = regmap_update_bits(dev->regmap, reg, mask, val);
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i2c_unlock_adapter(client->adapter);
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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_adapter(client->adapter);
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ret = regmap_bulk_read(dev->regmap, reg, val, val_count);
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i2c_unlock_adapter(client->adapter);
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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 * 2;
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s->max_drift = (fe->ops.info.frequency_stepsize * 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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/* 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);
|
|
if (ret)
|
|
goto err;
|
|
|
|
utmp = buf[0] << 8 | buf[1] << 0;
|
|
if (utmp)
|
|
stmp = (constant[constellation][hierarchy] -
|
|
intlog10(utmp)) / ((1 << 24) / 10000);
|
|
else
|
|
stmp = 0;
|
|
|
|
dev_dbg(&client->dev, "CNR raw=%u\n", utmp);
|
|
|
|
c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
|
|
c->cnr.stat[0].svalue = stmp;
|
|
} else {
|
|
c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
|
|
}
|
|
|
|
/* BER */
|
|
if (dev->fe_status & FE_HAS_LOCK) {
|
|
ret = rtl2830_bulk_read(client, 0x34e, buf, 2);
|
|
if (ret)
|
|
goto err;
|
|
|
|
utmp = buf[0] << 8 | buf[1] << 0;
|
|
dev->post_bit_error += utmp;
|
|
dev->post_bit_count += 1000000;
|
|
|
|
dev_dbg(&client->dev, "BER errors=%u total=1000000\n", utmp);
|
|
|
|
c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
|
|
c->post_bit_error.stat[0].uvalue = dev->post_bit_error;
|
|
c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
|
|
c->post_bit_count.stat[0].uvalue = dev->post_bit_count;
|
|
} else {
|
|
c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
|
|
c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
|
|
}
|
|
|
|
|
|
return ret;
|
|
err:
|
|
dev_dbg(&client->dev, "failed=%d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
static int rtl2830_read_snr(struct dvb_frontend *fe, u16 *snr)
|
|
{
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
|
|
|
if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL)
|
|
*snr = div_s64(c->cnr.stat[0].svalue, 100);
|
|
else
|
|
*snr = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rtl2830_read_ber(struct dvb_frontend *fe, u32 *ber)
|
|
{
|
|
struct i2c_client *client = fe->demodulator_priv;
|
|
struct rtl2830_dev *dev = i2c_get_clientdata(client);
|
|
|
|
*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 <crope@iki.fi>");
|
|
MODULE_DESCRIPTION("Realtek RTL2830 DVB-T demodulator driver");
|
|
MODULE_LICENSE("GPL");
|