diff options
| -rw-r--r-- | drivers/media/dvb/frontends/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/media/dvb/frontends/Makefile | 1 | ||||
| -rw-r--r-- | drivers/media/dvb/frontends/isl6421.c | 149 | ||||
| -rw-r--r-- | drivers/media/dvb/frontends/isl6421.h | 46 |
4 files changed, 202 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/Kconfig b/drivers/media/dvb/frontends/Kconfig index 64cd63623b0..0ef361f0309 100644 --- a/drivers/media/dvb/frontends/Kconfig +++ b/drivers/media/dvb/frontends/Kconfig @@ -226,4 +226,10 @@ config DVB_LNBP21 help An SEC control chip. +config DVB_ISL6421 + tristate "ISL6421 SEC controller" + depends on DVB_CORE + help + An SEC control chip. + endmenu diff --git a/drivers/media/dvb/frontends/Makefile b/drivers/media/dvb/frontends/Makefile index 7238e6ef2f2..5222245c7f5 100644 --- a/drivers/media/dvb/frontends/Makefile +++ b/drivers/media/dvb/frontends/Makefile @@ -32,3 +32,4 @@ obj-$(CONFIG_DVB_S5H1420) += s5h1420.o obj-$(CONFIG_DVB_LGDT330X) += lgdt330x.o obj-$(CONFIG_DVB_CX24123) += cx24123.o obj-$(CONFIG_DVB_LNBP21) += lnbp21.o +obj-$(CONFIG_DVB_ISL6421) += isl6421.o diff --git a/drivers/media/dvb/frontends/isl6421.c b/drivers/media/dvb/frontends/isl6421.c new file mode 100644 index 00000000000..36992077aaf --- /dev/null +++ b/drivers/media/dvb/frontends/isl6421.c @@ -0,0 +1,149 @@ +/* + * isl6421.h - driver for lnb supply and control ic ISL6421 + * + * Copyright (C) 2006 Andrew de Quincey + * Copyright (C) 2006 Oliver Endriss + * + * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * Or, point your browser to http://www.gnu.org/copyleft/gpl.html + * + * + * the project's page is at http://www.linuxtv.org + */ +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/string.h> +#include <linux/slab.h> + +#include "dvb_frontend.h" +#include "isl6421.h" + +struct isl6421 { + u8 config; + u8 override_or; + u8 override_and; + struct i2c_adapter *i2c; + u8 i2c_addr; + void (*release_chain)(struct dvb_frontend* fe); +}; + +static int isl6421_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage) +{ + struct isl6421 *isl6421 = (struct isl6421 *) fe->misc_priv; + struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0, + .buf = &isl6421->config, + .len = sizeof(isl6421->config) }; + + isl6421->config &= ~(ISL6421_VSEL1 | ISL6421_EN1); + + switch(voltage) { + case SEC_VOLTAGE_OFF: + break; + case SEC_VOLTAGE_13: + isl6421->config |= ISL6421_EN1; + break; + case SEC_VOLTAGE_18: + isl6421->config |= (ISL6421_EN1 | ISL6421_VSEL1); + break; + default: + return -EINVAL; + }; + + isl6421->config |= isl6421->override_or; + isl6421->config &= isl6421->override_and; + + return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO; +} + +static int isl6421_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg) +{ + struct isl6421 *isl6421 = (struct isl6421 *) fe->misc_priv; + struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0, + .buf = &isl6421->config, + .len = sizeof(isl6421->config) }; + + if (arg) + isl6421->config |= ISL6421_LLC1; + else + isl6421->config &= ~ISL6421_LLC1; + + isl6421->config |= isl6421->override_or; + isl6421->config &= isl6421->override_and; + + return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO; +} + +static void isl6421_release(struct dvb_frontend *fe) +{ + struct isl6421 *isl6421 = (struct isl6421 *) fe->misc_priv; + + /* power off */ + isl6421_set_voltage(fe, SEC_VOLTAGE_OFF); + + /* free data & call next release routine */ + fe->ops->release = isl6421->release_chain; + kfree(fe->misc_priv); + fe->misc_priv = NULL; + if (fe->ops->release) + fe->ops->release(fe); +} + +int isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr, + u8 override_set, u8 override_clear) +{ + struct isl6421 *isl6421 = kmalloc(sizeof(struct isl6421), GFP_KERNEL); + if (!isl6421) + return -ENOMEM; + + /* default configuration */ + isl6421->config = ISL6421_ISEL1; + isl6421->i2c = i2c; + isl6421->i2c_addr = i2c_addr; + fe->misc_priv = isl6421; + + /* bits which should be forced to '1' */ + isl6421->override_or = override_set; + + /* bits which should be forced to '0' */ + isl6421->override_and = ~override_clear; + + /* detect if it is present or not */ + if (isl6421_set_voltage(fe, SEC_VOLTAGE_OFF)) { + kfree(isl6421); + fe->misc_priv = NULL; + return -EIO; + } + + /* install release callback */ + isl6421->release_chain = fe->ops->release; + fe->ops->release = isl6421_release; + + /* override frontend ops */ + fe->ops->set_voltage = isl6421_set_voltage; + fe->ops->enable_high_lnb_voltage = isl6421_enable_high_lnb_voltage; + + return 0; +} +EXPORT_SYMBOL(isl6421_attach); + +MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6421"); +MODULE_AUTHOR("Andrew de Quincey & Oliver Endriss"); +MODULE_LICENSE("GPL"); diff --git a/drivers/media/dvb/frontends/isl6421.h b/drivers/media/dvb/frontends/isl6421.h new file mode 100644 index 00000000000..675f80a19b9 --- /dev/null +++ b/drivers/media/dvb/frontends/isl6421.h @@ -0,0 +1,46 @@ +/* + * isl6421.h - driver for lnb supply and control ic ISL6421 + * + * Copyright (C) 2006 Andrew de Quincey + * Copyright (C) 2006 Oliver Endriss + * + * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * Or, point your browser to http://www.gnu.org/copyleft/gpl.html + * + * + * the project's page is at http://www.linuxtv.org + */ + +#ifndef _ISL6421_H +#define _ISL6421_H + +#include <linux/dvb/frontend.h> + +/* system register bits */ +#define ISL6421_OLF1 0x01 +#define ISL6421_EN1 0x02 +#define ISL6421_VSEL1 0x04 +#define ISL6421_LLC1 0x08 +#define ISL6421_ENT1 0x10 +#define ISL6421_ISEL1 0x20 +#define ISL6421_DCL 0x40 + +/* override_set and override_clear control which system register bits (above) to always set & clear */ +extern int isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr, + u8 override_set, u8 override_clear); + +#endif |