diff options
Diffstat (limited to 'drivers/media/dvb-frontends/cxd2820r_core.c')
| -rw-r--r-- | drivers/media/dvb-frontends/cxd2820r_core.c | 758 |
1 files changed, 758 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/cxd2820r_core.c b/drivers/media/dvb-frontends/cxd2820r_core.c new file mode 100644 index 000000000000..9b658c1cf39a --- /dev/null +++ b/drivers/media/dvb-frontends/cxd2820r_core.c @@ -0,0 +1,758 @@ +/* + * Sony CXD2820R demodulator driver + * + * Copyright (C) 2010 Antti Palosaari <crope@iki.fi> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + + +#include "cxd2820r_priv.h" + +/* write multiple registers */ +static int cxd2820r_wr_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg, + u8 *val, int len) +{ + int ret; + u8 buf[len+1]; + struct i2c_msg msg[1] = { + { + .addr = i2c, + .flags = 0, + .len = sizeof(buf), + .buf = buf, + } + }; + + buf[0] = reg; + memcpy(&buf[1], val, len); + + ret = i2c_transfer(priv->i2c, msg, 1); + if (ret == 1) { + ret = 0; + } else { + dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \ + "len=%d\n", KBUILD_MODNAME, ret, reg, len); + ret = -EREMOTEIO; + } + return ret; +} + +/* read multiple registers */ +static int cxd2820r_rd_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg, + u8 *val, int len) +{ + int ret; + u8 buf[len]; + struct i2c_msg msg[2] = { + { + .addr = i2c, + .flags = 0, + .len = 1, + .buf = ®, + }, { + .addr = i2c, + .flags = I2C_M_RD, + .len = sizeof(buf), + .buf = buf, + } + }; + + ret = i2c_transfer(priv->i2c, msg, 2); + if (ret == 2) { + memcpy(val, buf, len); + ret = 0; + } else { + dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \ + "len=%d\n", KBUILD_MODNAME, ret, reg, len); + ret = -EREMOTEIO; + } + + return ret; +} + +/* write multiple registers */ +int cxd2820r_wr_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val, + int len) +{ + int ret; + u8 i2c_addr; + u8 reg = (reginfo >> 0) & 0xff; + u8 bank = (reginfo >> 8) & 0xff; + u8 i2c = (reginfo >> 16) & 0x01; + + /* select I2C */ + if (i2c) + i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */ + else + i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */ + + /* switch bank if needed */ + if (bank != priv->bank[i2c]) { + ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1); + if (ret) + return ret; + priv->bank[i2c] = bank; + } + return cxd2820r_wr_regs_i2c(priv, i2c_addr, reg, val, len); +} + +/* read multiple registers */ +int cxd2820r_rd_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val, + int len) +{ + int ret; + u8 i2c_addr; + u8 reg = (reginfo >> 0) & 0xff; + u8 bank = (reginfo >> 8) & 0xff; + u8 i2c = (reginfo >> 16) & 0x01; + + /* select I2C */ + if (i2c) + i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */ + else + i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */ + + /* switch bank if needed */ + if (bank != priv->bank[i2c]) { + ret = cxd2820r_wr_regs_i2c(priv, i2c_addr, 0x00, &bank, 1); + if (ret) + return ret; + priv->bank[i2c] = bank; + } + return cxd2820r_rd_regs_i2c(priv, i2c_addr, reg, val, len); +} + +/* write single register */ +int cxd2820r_wr_reg(struct cxd2820r_priv *priv, u32 reg, u8 val) +{ + return cxd2820r_wr_regs(priv, reg, &val, 1); +} + +/* read single register */ +int cxd2820r_rd_reg(struct cxd2820r_priv *priv, u32 reg, u8 *val) +{ + return cxd2820r_rd_regs(priv, reg, val, 1); +} + +/* write single register with mask */ +int cxd2820r_wr_reg_mask(struct cxd2820r_priv *priv, u32 reg, u8 val, + u8 mask) +{ + int ret; + u8 tmp; + + /* no need for read if whole reg is written */ + if (mask != 0xff) { + ret = cxd2820r_rd_reg(priv, reg, &tmp); + if (ret) + return ret; + + val &= mask; + tmp &= ~mask; + val |= tmp; + } + + return cxd2820r_wr_reg(priv, reg, val); +} + +int cxd2820r_gpio(struct dvb_frontend *fe, u8 *gpio) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + int ret, i; + u8 tmp0, tmp1; + + dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__, + fe->dtv_property_cache.delivery_system); + + /* update GPIOs only when needed */ + if (!memcmp(gpio, priv->gpio, sizeof(priv->gpio))) + return 0; + + tmp0 = 0x00; + tmp1 = 0x00; + for (i = 0; i < sizeof(priv->gpio); i++) { + /* enable / disable */ + if (gpio[i] & CXD2820R_GPIO_E) + tmp0 |= (2 << 6) >> (2 * i); + else + tmp0 |= (1 << 6) >> (2 * i); + + /* input / output */ + if (gpio[i] & CXD2820R_GPIO_I) + tmp1 |= (1 << (3 + i)); + else + tmp1 |= (0 << (3 + i)); + + /* high / low */ + if (gpio[i] & CXD2820R_GPIO_H) + tmp1 |= (1 << (0 + i)); + else + tmp1 |= (0 << (0 + i)); + + dev_dbg(&priv->i2c->dev, "%s: gpio i=%d %02x %02x\n", __func__, + i, tmp0, tmp1); + } + + dev_dbg(&priv->i2c->dev, "%s: wr gpio=%02x %02x\n", __func__, tmp0, + tmp1); + + /* write bits [7:2] */ + ret = cxd2820r_wr_reg_mask(priv, 0x00089, tmp0, 0xfc); + if (ret) + goto error; + + /* write bits [5:0] */ + ret = cxd2820r_wr_reg_mask(priv, 0x0008e, tmp1, 0x3f); + if (ret) + goto error; + + memcpy(priv->gpio, gpio, sizeof(priv->gpio)); + + return ret; +error: + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); + return ret; +} + +/* 64 bit div with round closest, like DIV_ROUND_CLOSEST but 64 bit */ +u32 cxd2820r_div_u64_round_closest(u64 dividend, u32 divisor) +{ + return div_u64(dividend + (divisor / 2), divisor); +} + +static int cxd2820r_set_frontend(struct dvb_frontend *fe) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret; + + dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__, + fe->dtv_property_cache.delivery_system); + + switch (c->delivery_system) { + case SYS_DVBT: + ret = cxd2820r_init_t(fe); + if (ret < 0) + goto err; + ret = cxd2820r_set_frontend_t(fe); + if (ret < 0) + goto err; + break; + case SYS_DVBT2: + ret = cxd2820r_init_t(fe); + if (ret < 0) + goto err; + ret = cxd2820r_set_frontend_t2(fe); + if (ret < 0) + goto err; + break; + case SYS_DVBC_ANNEX_A: + ret = cxd2820r_init_c(fe); + if (ret < 0) + goto err; + ret = cxd2820r_set_frontend_c(fe); + if (ret < 0) + goto err; + break; + default: + dev_dbg(&priv->i2c->dev, "%s: error state=%d\n", __func__, + fe->dtv_property_cache.delivery_system); + ret = -EINVAL; + break; + } +err: + return ret; +} +static int cxd2820r_read_status(struct dvb_frontend *fe, fe_status_t *status) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + int ret; + + dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__, + fe->dtv_property_cache.delivery_system); + + switch (fe->dtv_property_cache.delivery_system) { + case SYS_DVBT: + ret = cxd2820r_read_status_t(fe, status); + break; + case SYS_DVBT2: + ret = cxd2820r_read_status_t2(fe, status); + break; + case SYS_DVBC_ANNEX_A: + ret = cxd2820r_read_status_c(fe, status); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int cxd2820r_get_frontend(struct dvb_frontend *fe) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + int ret; + + dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__, + fe->dtv_property_cache.delivery_system); + + if (priv->delivery_system == SYS_UNDEFINED) + return 0; + + switch (fe->dtv_property_cache.delivery_system) { + case SYS_DVBT: + ret = cxd2820r_get_frontend_t(fe); + break; + case SYS_DVBT2: + ret = cxd2820r_get_frontend_t2(fe); + break; + case SYS_DVBC_ANNEX_A: + ret = cxd2820r_get_frontend_c(fe); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int cxd2820r_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + int ret; + + dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__, + fe->dtv_property_cache.delivery_system); + + switch (fe->dtv_property_cache.delivery_system) { + case SYS_DVBT: + ret = cxd2820r_read_ber_t(fe, ber); + break; + case SYS_DVBT2: + ret = cxd2820r_read_ber_t2(fe, ber); + break; + case SYS_DVBC_ANNEX_A: + ret = cxd2820r_read_ber_c(fe, ber); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int cxd2820r_read_signal_strength(struct dvb_frontend *fe, u16 *strength) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + int ret; + + dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__, + fe->dtv_property_cache.delivery_system); + + switch (fe->dtv_property_cache.delivery_system) { + case SYS_DVBT: + ret = cxd2820r_read_signal_strength_t(fe, strength); + break; + case SYS_DVBT2: + ret = cxd2820r_read_signal_strength_t2(fe, strength); + break; + case SYS_DVBC_ANNEX_A: + ret = cxd2820r_read_signal_strength_c(fe, strength); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int cxd2820r_read_snr(struct dvb_frontend *fe, u16 *snr) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + int ret; + + dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__, + fe->dtv_property_cache.delivery_system); + + switch (fe->dtv_property_cache.delivery_system) { + case SYS_DVBT: + ret = cxd2820r_read_snr_t(fe, snr); + break; + case SYS_DVBT2: + ret = cxd2820r_read_snr_t2(fe, snr); + break; + case SYS_DVBC_ANNEX_A: + ret = cxd2820r_read_snr_c(fe, snr); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int cxd2820r_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + int ret; + + dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__, + fe->dtv_property_cache.delivery_system); + + switch (fe->dtv_property_cache.delivery_system) { + case SYS_DVBT: + ret = cxd2820r_read_ucblocks_t(fe, ucblocks); + break; + case SYS_DVBT2: + ret = cxd2820r_read_ucblocks_t2(fe, ucblocks); + break; + case SYS_DVBC_ANNEX_A: + ret = cxd2820r_read_ucblocks_c(fe, ucblocks); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int cxd2820r_init(struct dvb_frontend *fe) +{ + return 0; +} + +static int cxd2820r_sleep(struct dvb_frontend *fe) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + int ret; + + dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__, + fe->dtv_property_cache.delivery_system); + + switch (fe->dtv_property_cache.delivery_system) { + case SYS_DVBT: + ret = cxd2820r_sleep_t(fe); + break; + case SYS_DVBT2: + ret = cxd2820r_sleep_t2(fe); + break; + case SYS_DVBC_ANNEX_A: + ret = cxd2820r_sleep_c(fe); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int cxd2820r_get_tune_settings(struct dvb_frontend *fe, + struct dvb_frontend_tune_settings *s) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + int ret; + + dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__, + fe->dtv_property_cache.delivery_system); + + switch (fe->dtv_property_cache.delivery_system) { + case SYS_DVBT: + ret = cxd2820r_get_tune_settings_t(fe, s); + break; + case SYS_DVBT2: + ret = cxd2820r_get_tune_settings_t2(fe, s); + break; + case SYS_DVBC_ANNEX_A: + ret = cxd2820r_get_tune_settings_c(fe, s); + break; + default: + ret = -EINVAL; + break; + } + return ret; +} + +static enum dvbfe_search cxd2820r_search(struct dvb_frontend *fe) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret, i; + fe_status_t status = 0; + + dev_dbg(&priv->i2c->dev, "%s: delsys=%d\n", __func__, + fe->dtv_property_cache.delivery_system); + + /* switch between DVB-T and DVB-T2 when tune fails */ + if (priv->last_tune_failed) { + if (priv->delivery_system == SYS_DVBT) { + ret = cxd2820r_sleep_t(fe); + if (ret) + goto error; + + c->delivery_system = SYS_DVBT2; + } else if (priv->delivery_system == SYS_DVBT2) { + ret = cxd2820r_sleep_t2(fe); + if (ret) + goto error; + + c->delivery_system = SYS_DVBT; + } + } + + /* set frontend */ + ret = cxd2820r_set_frontend(fe); + if (ret) + goto error; + + + /* frontend lock wait loop count */ + switch (priv->delivery_system) { + case SYS_DVBT: + case SYS_DVBC_ANNEX_A: + i = 20; + break; + case SYS_DVBT2: + i = 40; + break; + case SYS_UNDEFINED: + default: + i = 0; + break; + } + + /* wait frontend lock */ + for (; i > 0; i--) { + dev_dbg(&priv->i2c->dev, "%s: loop=%d\n", __func__, i); + msleep(50); + ret = cxd2820r_read_status(fe, &status); + if (ret) + goto error; + + if (status & FE_HAS_LOCK) + break; + } + + /* check if we have a valid signal */ + if (status & FE_HAS_LOCK) { + priv->last_tune_failed = 0; + return DVBFE_ALGO_SEARCH_SUCCESS; + } else { + priv->last_tune_failed = 1; + return DVBFE_ALGO_SEARCH_AGAIN; + } + +error: + dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); + return DVBFE_ALGO_SEARCH_ERROR; +} + +static int cxd2820r_get_frontend_algo(struct dvb_frontend *fe) +{ + return DVBFE_ALGO_CUSTOM; +} + +static void cxd2820r_release(struct dvb_frontend *fe) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + int uninitialized_var(ret); /* silence compiler warning */ + + dev_dbg(&priv->i2c->dev, "%s\n", __func__); + +#ifdef CONFIG_GPIOLIB + /* remove GPIOs */ + if (priv->gpio_chip.label) { + ret = gpiochip_remove(&priv->gpio_chip); + if (ret) + dev_err(&priv->i2c->dev, "%s: gpiochip_remove() " \ + "failed=%d\n", KBUILD_MODNAME, ret); + } +#endif + kfree(priv); + return; +} + +static int cxd2820r_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) +{ + struct cxd2820r_priv *priv = fe->demodulator_priv; + + dev_dbg(&priv->i2c->dev, "%s: %d\n", __func__, enable); + + /* Bit 0 of reg 0xdb in bank 0x00 controls I2C repeater */ + return cxd2820r_wr_reg_mask(priv, 0xdb, enable ? 1 : 0, 0x1); +} + +#ifdef CONFIG_GPIOLIB +static int cxd2820r_gpio_direction_output(struct gpio_chip *chip, unsigned nr, + int val) +{ + struct cxd2820r_priv *priv = + container_of(chip, struct cxd2820r_priv, gpio_chip); + u8 gpio[GPIO_COUNT]; + + dev_dbg(&priv->i2c->dev, "%s: nr=%d val=%d\n", __func__, nr, val); + + memcpy(gpio, priv->gpio, sizeof(gpio)); + gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2); + + return cxd2820r_gpio(&priv->fe, gpio); +} + +static void cxd2820r_gpio_set(struct gpio_chip *chip, unsigned nr, int val) +{ + struct cxd2820r_priv *priv = + container_of(chip, struct cxd2820r_priv, gpio_chip); + u8 gpio[GPIO_COUNT]; + + dev_dbg(&priv->i2c->dev, "%s: nr=%d val=%d\n", __func__, nr, val); + + memcpy(gpio, priv->gpio, sizeof(gpio)); + gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2); + + (void) cxd2820r_gpio(&priv->fe, gpio); + + return; +} + +static int cxd2820r_gpio_get(struct gpio_chip *chip, unsigned nr) +{ + struct cxd2820r_priv *priv = + container_of(chip, struct cxd2820r_priv, gpio_chip); + + dev_dbg(&priv->i2c->dev, "%s: nr=%d\n", __func__, nr); + + return (priv->gpio[nr] >> 2) & 0x01; +} +#endif + +static const struct dvb_frontend_ops cxd2820r_ops = { + .delsys = { SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A }, + /* default: DVB-T/T2 */ + .info = { + .name = "Sony CXD2820R", + + .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_32 | + FE_CAN_QAM_64 | + FE_CAN_QAM_128 | + FE_CAN_QAM_256 | + FE_CAN_QAM_AUTO | + FE_CAN_TRANSMISSION_MODE_AUTO | + FE_CAN_GUARD_INTERVAL_AUTO | + FE_CAN_HIERARCHY_AUTO | + FE_CAN_MUTE_TS | + FE_CAN_2G_MODULATION + }, + + .release = cxd2820r_release, + .init = cxd2820r_init, + .sleep = cxd2820r_sleep, + + .get_tune_settings = cxd2820r_get_tune_settings, + .i2c_gate_ctrl = cxd2820r_i2c_gate_ctrl, + + .get_frontend = cxd2820r_get_frontend, + + .get_frontend_algo = cxd2820r_get_frontend_algo, + .search = cxd2820r_search, + + .read_status = cxd2820r_read_status, + .read_snr = cxd2820r_read_snr, + .read_ber = cxd2820r_read_ber, + .read_ucblocks = cxd2820r_read_ucblocks, + .read_signal_strength = cxd2820r_read_signal_strength, +}; + +struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *cfg, + struct i2c_adapter *i2c, int *gpio_chip_base +) +{ + struct cxd2820r_priv *priv; + int ret; + u8 tmp; + + priv = kzalloc(sizeof(struct cxd2820r_priv), GFP_KERNEL); + if (!priv) { + ret = -ENOMEM; + dev_err(&i2c->dev, "%s: kzalloc() failed\n", + KBUILD_MODNAME); + goto error; + } + + priv->i2c = i2c; + memcpy(&priv->cfg, cfg, sizeof(struct cxd2820r_config)); + memcpy(&priv->fe.ops, &cxd2820r_ops, sizeof(struct dvb_frontend_ops)); + priv->fe.demodulator_priv = priv; + + priv->bank[0] = priv->bank[1] = 0xff; + ret = cxd2820r_rd_reg(priv, 0x000fd, &tmp); + dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, tmp); + if (ret || tmp != 0xe1) + goto error; + + if (gpio_chip_base) { +#ifdef CONFIG_GPIOLIB + /* add GPIOs */ + priv->gpio_chip.label = KBUILD_MODNAME; + priv->gpio_chip.dev = &priv->i2c->dev; + priv->gpio_chip.owner = THIS_MODULE; + priv->gpio_chip.direction_output = + cxd2820r_gpio_direction_output; + priv->gpio_chip.set = cxd2820r_gpio_set; + priv->gpio_chip.get = cxd2820r_gpio_get; + priv->gpio_chip.base = -1; /* dynamic allocation */ + priv->gpio_chip.ngpio = GPIO_COUNT; + priv->gpio_chip.can_sleep = 1; + ret = gpiochip_add(&priv->gpio_chip); + if (ret) + goto error; + + dev_dbg(&priv->i2c->dev, "%s: gpio_chip.base=%d\n", __func__, + priv->gpio_chip.base); + + *gpio_chip_base = priv->gpio_chip.base; +#else + /* + * Use static GPIO configuration if GPIOLIB is undefined. + * This is fallback condition. + */ + u8 gpio[GPIO_COUNT]; + gpio[0] = (*gpio_chip_base >> 0) & 0x07; + gpio[1] = (*gpio_chip_base >> 3) & 0x07; + gpio[2] = 0; + ret = cxd2820r_gpio(&priv->fe, gpio); + if (ret) + goto error; +#endif + } + + return &priv->fe; +error: + dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret); + kfree(priv); + return NULL; +} +EXPORT_SYMBOL(cxd2820r_attach); + +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_DESCRIPTION("Sony CXD2820R demodulator driver"); +MODULE_LICENSE("GPL"); |