diff options
Diffstat (limited to 'drivers/media/dvb-frontends/horus3a.c')
| -rw-r--r-- | drivers/media/dvb-frontends/horus3a.c | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/horus3a.c b/drivers/media/dvb-frontends/horus3a.c new file mode 100644 index 000000000..02bc08081 --- /dev/null +++ b/drivers/media/dvb-frontends/horus3a.c @@ -0,0 +1,411 @@ +/* + * horus3a.h + * + * Sony Horus3A DVB-S/S2 tuner driver + * + * Copyright 2012 Sony Corporation + * Copyright (C) 2014 NetUP Inc. + * Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru> + * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/dvb/frontend.h> +#include <linux/types.h> +#include "horus3a.h" +#include <media/dvb_frontend.h> + +#define MAX_WRITE_REGSIZE 5 + +enum horus3a_state { + STATE_UNKNOWN, + STATE_SLEEP, + STATE_ACTIVE +}; + +struct horus3a_priv { + u32 frequency; + u8 i2c_address; + struct i2c_adapter *i2c; + enum horus3a_state state; + void *set_tuner_data; + int (*set_tuner)(void *, int); +}; + +static void horus3a_i2c_debug(struct horus3a_priv *priv, + u8 reg, u8 write, const u8 *data, u32 len) +{ + dev_dbg(&priv->i2c->dev, "horus3a: I2C %s reg 0x%02x size %d\n", + (write == 0 ? "read" : "write"), reg, len); + print_hex_dump_bytes("horus3a: I2C data: ", + DUMP_PREFIX_OFFSET, data, len); +} + +static int horus3a_write_regs(struct horus3a_priv *priv, + u8 reg, const u8 *data, u32 len) +{ + int ret; + u8 buf[MAX_WRITE_REGSIZE + 1]; + struct i2c_msg msg[1] = { + { + .addr = priv->i2c_address, + .flags = 0, + .len = len + 1, + .buf = buf, + } + }; + + if (len + 1 > sizeof(buf)) { + dev_warn(&priv->i2c->dev,"wr reg=%04x: len=%d is too big!\n", + reg, len + 1); + return -E2BIG; + } + + horus3a_i2c_debug(priv, reg, 1, data, len); + buf[0] = reg; + memcpy(&buf[1], data, len); + ret = i2c_transfer(priv->i2c, msg, 1); + if (ret >= 0 && ret != 1) + ret = -EREMOTEIO; + if (ret < 0) { + dev_warn(&priv->i2c->dev, + "%s: i2c wr failed=%d reg=%02x len=%d\n", + KBUILD_MODNAME, ret, reg, len); + return ret; + } + return 0; +} + +static int horus3a_write_reg(struct horus3a_priv *priv, u8 reg, u8 val) +{ + u8 tmp = val; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */ + + return horus3a_write_regs(priv, reg, &tmp, 1); +} + +static int horus3a_enter_power_save(struct horus3a_priv *priv) +{ + u8 data[2]; + + dev_dbg(&priv->i2c->dev, "%s()\n", __func__); + if (priv->state == STATE_SLEEP) + return 0; + /* IQ Generator disable */ + horus3a_write_reg(priv, 0x2a, 0x79); + /* MDIV_EN = 0 */ + horus3a_write_reg(priv, 0x29, 0x70); + /* VCO disable preparation */ + horus3a_write_reg(priv, 0x28, 0x3e); + /* VCO buffer disable */ + horus3a_write_reg(priv, 0x2a, 0x19); + /* VCO calibration disable */ + horus3a_write_reg(priv, 0x1c, 0x00); + /* Power save setting (xtal is not stopped) */ + data[0] = 0xC0; + /* LNA is Disabled */ + data[1] = 0xA7; + /* 0x11 - 0x12 */ + horus3a_write_regs(priv, 0x11, data, sizeof(data)); + priv->state = STATE_SLEEP; + return 0; +} + +static int horus3a_leave_power_save(struct horus3a_priv *priv) +{ + u8 data[2]; + + dev_dbg(&priv->i2c->dev, "%s()\n", __func__); + if (priv->state == STATE_ACTIVE) + return 0; + /* Leave power save */ + data[0] = 0x00; + /* LNA is Disabled */ + data[1] = 0xa7; + /* 0x11 - 0x12 */ + horus3a_write_regs(priv, 0x11, data, sizeof(data)); + /* VCO buffer enable */ + horus3a_write_reg(priv, 0x2a, 0x79); + /* VCO calibration enable */ + horus3a_write_reg(priv, 0x1c, 0xc0); + /* MDIV_EN = 1 */ + horus3a_write_reg(priv, 0x29, 0x71); + usleep_range(5000, 7000); + priv->state = STATE_ACTIVE; + return 0; +} + +static int horus3a_init(struct dvb_frontend *fe) +{ + struct horus3a_priv *priv = fe->tuner_priv; + + dev_dbg(&priv->i2c->dev, "%s()\n", __func__); + return 0; +} + +static void horus3a_release(struct dvb_frontend *fe) +{ + struct horus3a_priv *priv = fe->tuner_priv; + + dev_dbg(&priv->i2c->dev, "%s()\n", __func__); + kfree(fe->tuner_priv); + fe->tuner_priv = NULL; +} + +static int horus3a_sleep(struct dvb_frontend *fe) +{ + struct horus3a_priv *priv = fe->tuner_priv; + + dev_dbg(&priv->i2c->dev, "%s()\n", __func__); + horus3a_enter_power_save(priv); + return 0; +} + +static int horus3a_set_params(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + struct horus3a_priv *priv = fe->tuner_priv; + u32 frequency = p->frequency; + u32 symbol_rate = p->symbol_rate/1000; + u8 mixdiv = 0; + u8 mdiv = 0; + u32 ms = 0; + u8 f_ctl = 0; + u8 g_ctl = 0; + u8 fc_lpf = 0; + u8 data[5]; + + dev_dbg(&priv->i2c->dev, "%s(): frequency %dkHz symbol_rate %dksps\n", + __func__, frequency, symbol_rate); + if (priv->set_tuner) + priv->set_tuner(priv->set_tuner_data, 0); + if (priv->state == STATE_SLEEP) + horus3a_leave_power_save(priv); + + /* frequency should be X MHz (X : integer) */ + frequency = DIV_ROUND_CLOSEST(frequency, 1000) * 1000; + if (frequency <= 1155000) { + mixdiv = 4; + mdiv = 1; + } else { + mixdiv = 2; + mdiv = 0; + } + /* Assumed that fREF == 1MHz (1000kHz) */ + ms = DIV_ROUND_CLOSEST((frequency * mixdiv) / 2, 1000); + if (ms > 0x7FFF) { /* 15 bit */ + dev_err(&priv->i2c->dev, "horus3a: invalid frequency %d\n", + frequency); + return -EINVAL; + } + if (frequency < 975000) { + /* F_CTL=11100 G_CTL=001 */ + f_ctl = 0x1C; + g_ctl = 0x01; + } else if (frequency < 1050000) { + /* F_CTL=11000 G_CTL=010 */ + f_ctl = 0x18; + g_ctl = 0x02; + } else if (frequency < 1150000) { + /* F_CTL=10100 G_CTL=010 */ + f_ctl = 0x14; + g_ctl = 0x02; + } else if (frequency < 1250000) { + /* F_CTL=10000 G_CTL=011 */ + f_ctl = 0x10; + g_ctl = 0x03; + } else if (frequency < 1350000) { + /* F_CTL=01100 G_CTL=100 */ + f_ctl = 0x0C; + g_ctl = 0x04; + } else if (frequency < 1450000) { + /* F_CTL=01010 G_CTL=100 */ + f_ctl = 0x0A; + g_ctl = 0x04; + } else if (frequency < 1600000) { + /* F_CTL=00111 G_CTL=101 */ + f_ctl = 0x07; + g_ctl = 0x05; + } else if (frequency < 1800000) { + /* F_CTL=00100 G_CTL=010 */ + f_ctl = 0x04; + g_ctl = 0x02; + } else if (frequency < 2000000) { + /* F_CTL=00010 G_CTL=001 */ + f_ctl = 0x02; + g_ctl = 0x01; + } else { + /* F_CTL=00000 G_CTL=000 */ + f_ctl = 0x00; + g_ctl = 0x00; + } + /* LPF cutoff frequency setting */ + if (p->delivery_system == SYS_DVBS) { + /* + * rolloff = 0.35 + * SR <= 4.3 + * fc_lpf = 5 + * 4.3 < SR <= 10 + * fc_lpf = SR * (1 + rolloff) / 2 + SR / 2 = + * SR * 1.175 = SR * (47/40) + * 10 < SR + * fc_lpf = SR * (1 + rolloff) / 2 + 5 = + * SR * 0.675 + 5 = SR * (27/40) + 5 + * NOTE: The result should be round up. + */ + if (symbol_rate <= 4300) + fc_lpf = 5; + else if (symbol_rate <= 10000) + fc_lpf = (u8)DIV_ROUND_UP(symbol_rate * 47, 40000); + else + fc_lpf = (u8)DIV_ROUND_UP(symbol_rate * 27, 40000) + 5; + /* 5 <= fc_lpf <= 36 */ + if (fc_lpf > 36) + fc_lpf = 36; + } else if (p->delivery_system == SYS_DVBS2) { + /* + * SR <= 4.5: + * fc_lpf = 5 + * 4.5 < SR <= 10: + * fc_lpf = SR * (1 + rolloff) / 2 + SR / 2 + * 10 < SR: + * fc_lpf = SR * (1 + rolloff) / 2 + 5 + * NOTE: The result should be round up. + */ + if (symbol_rate <= 4500) + fc_lpf = 5; + else if (symbol_rate <= 10000) + fc_lpf = (u8)((symbol_rate * 11 + (10000-1)) / 10000); + else + fc_lpf = (u8)((symbol_rate * 3 + (5000-1)) / 5000 + 5); + /* 5 <= fc_lpf <= 36 is valid */ + if (fc_lpf > 36) + fc_lpf = 36; + } else { + dev_err(&priv->i2c->dev, + "horus3a: invalid delivery system %d\n", + p->delivery_system); + return -EINVAL; + } + /* 0x00 - 0x04 */ + data[0] = (u8)((ms >> 7) & 0xFF); + data[1] = (u8)((ms << 1) & 0xFF); + data[2] = 0x00; + data[3] = 0x00; + data[4] = (u8)(mdiv << 7); + horus3a_write_regs(priv, 0x00, data, sizeof(data)); + /* Write G_CTL, F_CTL */ + horus3a_write_reg(priv, 0x09, (u8)((g_ctl << 5) | f_ctl)); + /* Write LPF cutoff frequency */ + horus3a_write_reg(priv, 0x37, (u8)(0x80 | (fc_lpf << 1))); + /* Start Calibration */ + horus3a_write_reg(priv, 0x05, 0x80); + /* IQ Generator enable */ + horus3a_write_reg(priv, 0x2a, 0x7b); + /* tuner stabilization time */ + msleep(60); + /* Store tuned frequency to the struct */ + priv->frequency = ms * 2 * 1000 / mixdiv; + return 0; +} + +static int horus3a_get_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + struct horus3a_priv *priv = fe->tuner_priv; + + *frequency = priv->frequency; + return 0; +} + +static const struct dvb_tuner_ops horus3a_tuner_ops = { + .info = { + .name = "Sony Horus3a", + .frequency_min_hz = 950 * MHz, + .frequency_max_hz = 2150 * MHz, + .frequency_step_hz = 1 * MHz, + }, + .init = horus3a_init, + .release = horus3a_release, + .sleep = horus3a_sleep, + .set_params = horus3a_set_params, + .get_frequency = horus3a_get_frequency, +}; + +struct dvb_frontend *horus3a_attach(struct dvb_frontend *fe, + const struct horus3a_config *config, + struct i2c_adapter *i2c) +{ + u8 buf[3], val; + struct horus3a_priv *priv = NULL; + + priv = kzalloc(sizeof(struct horus3a_priv), GFP_KERNEL); + if (priv == NULL) + return NULL; + priv->i2c_address = (config->i2c_address >> 1); + priv->i2c = i2c; + priv->set_tuner_data = config->set_tuner_priv; + priv->set_tuner = config->set_tuner_callback; + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + + /* wait 4ms after power on */ + usleep_range(4000, 6000); + /* IQ Generator disable */ + horus3a_write_reg(priv, 0x2a, 0x79); + /* REF_R = Xtal Frequency */ + buf[0] = config->xtal_freq_mhz; + buf[1] = config->xtal_freq_mhz; + buf[2] = 0; + /* 0x6 - 0x8 */ + horus3a_write_regs(priv, 0x6, buf, 3); + /* IQ Out = Single Ended */ + horus3a_write_reg(priv, 0x0a, 0x40); + switch (config->xtal_freq_mhz) { + case 27: + val = 0x1f; + break; + case 24: + val = 0x10; + break; + case 16: + val = 0xc; + break; + default: + val = 0; + dev_warn(&priv->i2c->dev, + "horus3a: invalid xtal frequency %dMHz\n", + config->xtal_freq_mhz); + break; + } + val <<= 2; + horus3a_write_reg(priv, 0x0e, val); + horus3a_enter_power_save(priv); + usleep_range(3000, 5000); + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + memcpy(&fe->ops.tuner_ops, &horus3a_tuner_ops, + sizeof(struct dvb_tuner_ops)); + fe->tuner_priv = priv; + dev_info(&priv->i2c->dev, + "Sony HORUS3A attached on addr=%x at I2C adapter %p\n", + priv->i2c_address, priv->i2c); + return fe; +} +EXPORT_SYMBOL(horus3a_attach); + +MODULE_DESCRIPTION("Sony HORUS3A satellite tuner driver"); +MODULE_AUTHOR("Sergey Kozlov <serjk@netup.ru>"); +MODULE_LICENSE("GPL"); |