diff options
Diffstat (limited to 'drivers/media/dvb-frontends/lnbp21.c')
| -rw-r--r-- | drivers/media/dvb-frontends/lnbp21.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/lnbp21.c b/drivers/media/dvb-frontends/lnbp21.c new file mode 100644 index 000000000..32593b1f7 --- /dev/null +++ b/drivers/media/dvb-frontends/lnbp21.c @@ -0,0 +1,171 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * lnbp21.c - driver for lnb supply and control ic lnbp21 + * + * Copyright (C) 2006, 2009 Oliver Endriss <o.endriss@gmx.de> + * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru> + * + * the project's page is at https://linuxtv.org + */ +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/string.h> +#include <linux/slab.h> + +#include <media/dvb_frontend.h> +#include "lnbp21.h" +#include "lnbh24.h" + +struct lnbp21 { + u8 config; + u8 override_or; + u8 override_and; + struct i2c_adapter *i2c; + u8 i2c_addr; +}; + +static int lnbp21_set_voltage(struct dvb_frontend *fe, + enum fe_sec_voltage voltage) +{ + struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv; + struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0, + .buf = &lnbp21->config, + .len = sizeof(lnbp21->config) }; + + lnbp21->config &= ~(LNBP21_VSEL | LNBP21_EN); + + switch(voltage) { + case SEC_VOLTAGE_OFF: + break; + case SEC_VOLTAGE_13: + lnbp21->config |= LNBP21_EN; + break; + case SEC_VOLTAGE_18: + lnbp21->config |= (LNBP21_EN | LNBP21_VSEL); + break; + default: + return -EINVAL; + } + + lnbp21->config |= lnbp21->override_or; + lnbp21->config &= lnbp21->override_and; + + return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO; +} + +static int lnbp21_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg) +{ + struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv; + struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0, + .buf = &lnbp21->config, + .len = sizeof(lnbp21->config) }; + + if (arg) + lnbp21->config |= LNBP21_LLC; + else + lnbp21->config &= ~LNBP21_LLC; + + lnbp21->config |= lnbp21->override_or; + lnbp21->config &= lnbp21->override_and; + + return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO; +} + +static int lnbp21_set_tone(struct dvb_frontend *fe, + enum fe_sec_tone_mode tone) +{ + struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv; + struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0, + .buf = &lnbp21->config, + .len = sizeof(lnbp21->config) }; + + switch (tone) { + case SEC_TONE_OFF: + lnbp21->config &= ~LNBP21_TEN; + break; + case SEC_TONE_ON: + lnbp21->config |= LNBP21_TEN; + break; + default: + return -EINVAL; + } + + lnbp21->config |= lnbp21->override_or; + lnbp21->config &= lnbp21->override_and; + + return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO; +} + +static void lnbp21_release(struct dvb_frontend *fe) +{ + /* LNBP power off */ + lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF); + + /* free data */ + kfree(fe->sec_priv); + fe->sec_priv = NULL; +} + +static struct dvb_frontend *lnbx2x_attach(struct dvb_frontend *fe, + struct i2c_adapter *i2c, u8 override_set, + u8 override_clear, u8 i2c_addr, u8 config) +{ + struct lnbp21 *lnbp21 = kmalloc(sizeof(struct lnbp21), GFP_KERNEL); + if (!lnbp21) + return NULL; + + /* default configuration */ + lnbp21->config = config; + lnbp21->i2c = i2c; + lnbp21->i2c_addr = i2c_addr; + fe->sec_priv = lnbp21; + + /* bits which should be forced to '1' */ + lnbp21->override_or = override_set; + + /* bits which should be forced to '0' */ + lnbp21->override_and = ~override_clear; + + /* detect if it is present or not */ + if (lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF)) { + kfree(lnbp21); + return NULL; + } + + /* install release callback */ + fe->ops.release_sec = lnbp21_release; + + /* override frontend ops */ + fe->ops.set_voltage = lnbp21_set_voltage; + fe->ops.enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage; + if (!(override_clear & LNBH24_TEN)) /*22kHz logic controlled by demod*/ + fe->ops.set_tone = lnbp21_set_tone; + printk(KERN_INFO "LNBx2x attached on addr=%x\n", lnbp21->i2c_addr); + + return fe; +} + +struct dvb_frontend *lnbh24_attach(struct dvb_frontend *fe, + struct i2c_adapter *i2c, u8 override_set, + u8 override_clear, u8 i2c_addr) +{ + return lnbx2x_attach(fe, i2c, override_set, override_clear, + i2c_addr, LNBH24_TTX); +} +EXPORT_SYMBOL_GPL(lnbh24_attach); + +struct dvb_frontend *lnbp21_attach(struct dvb_frontend *fe, + struct i2c_adapter *i2c, u8 override_set, + u8 override_clear) +{ + return lnbx2x_attach(fe, i2c, override_set, override_clear, + 0x08, LNBP21_ISEL); +} +EXPORT_SYMBOL_GPL(lnbp21_attach); + +MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp21, lnbh24"); +MODULE_AUTHOR("Oliver Endriss, Igor M. Liplianin"); +MODULE_LICENSE("GPL"); |