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- --- a/Makefile.am
- +++ b/Makefile.am
- @@ -72,6 +72,8 @@ drv_generic_i2c.c \
- drv_generic_i2c.h \
- drv_generic_keypad.c \
- drv_generic_keypad.h \
- +drv_generic_spidev.c \
- +drv_generic_spidev.h \
- drv_ASTUSB.c \
- drv_BeckmannEgle.c \
- drv_BWCT.c \
- --- /dev/null
- +++ b/drv_generic_spidev.c
- @@ -0,0 +1,89 @@
- +/* $Id$
- + * $URL$
- + *
- + * generic driver helper for displays connected via SPI bus
- + *
- + * Copyright (C) 2012 Gabor Juhos <juhosg@openwrt.org>
- + *
- + * This file is part of LCD4Linux.
- + *
- + * LCD4Linux 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, or (at your option)
- + * any later version.
- + *
- + * LCD4Linux 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- + *
- + */
- +
- +#include "config.h"
- +
- +#include <stdlib.h>
- +#include <stdio.h>
- +#include <string.h>
- +#include <errno.h>
- +#include <unistd.h>
- +#include <fcntl.h>
- +#include <sys/types.h>
- +#include <sys/ioctl.h>
- +
- +#include "debug.h"
- +#include "qprintf.h"
- +#include "cfg.h"
- +#include "drv_generic_spidev.h"
- +
- +static char *generic_spidev_section = "";
- +static char *generic_spidev_driver = "";
- +static int generic_spidev_fd;
- +
- +int drv_generic_spidev_open(const char *section, const char *driver)
- +{
- + char *spidev;
- +
- + udelay_init();
- +
- + generic_spidev_section = (char *) section;
- + generic_spidev_driver = (char *) driver;
- +
- + spidev = cfg_get(generic_spidev_section, "Port", NULL);
- +
- + info("%s: initializing SPI device %s", generic_spidev_driver, spidev);
- + generic_spidev_fd = open(spidev, O_WRONLY);
- + if (generic_spidev_fd < 0) {
- + error("%s: unable to open SPI device %s!\n", generic_spidev_driver, spidev);
- + goto exit_error;
- + }
- +
- + return 0;
- +
- + exit_error:
- + free(spidev);
- + return -1;
- +}
- +
- +int drv_generic_spidev_close(void)
- +{
- + close(generic_spidev_fd);
- + return 0;
- +}
- +
- +int drv_generic_spidev_transfer(const int count, struct spi_ioc_transfer *tr)
- +{
- + int ret;
- +
- + ret = ioctl(generic_spidev_fd, SPI_IOC_MESSAGE(count), tr);
- + if (ret < count) {
- + error("%s: can't send SPI message! (%s)\n",
- + generic_spidev_driver, strerror(errno));
- + return -1;
- + }
- +
- + return 0;
- +}
- --- /dev/null
- +++ b/drv_generic_spidev.h
- @@ -0,0 +1,54 @@
- +/* $Id$
- + * $URL$
- + *
- + * generic driver helper for displays connected via SPI bus
- + *
- + * Copyright (C) 2012 Gabor Juhos <juhosg@openwrt.org>
- + * Copyright (C) 2012 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
- + *
- + * This file is part of LCD4Linux.
- + *
- + * LCD4Linux 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, or (at your option)
- + * any later version.
- + *
- + * LCD4Linux 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- + *
- + */
- +
- +/*
- + *
- + * exported fuctions:
- + *
- + * int drv_generic_spidev_open (const char *section, const char *driver)
- + * reads 'Port' entry from config and opens
- + * the SPI device
- + * returns 0 if ok, -1 on failure
- + *
- + * int drv_generic_spidev_close (void)
- + * closes SPI device
- + * returns 0 if ok, -1 on failure
- + *
- + * void drv_generic_spidev_transfer (int count, struct spi_ioc_transfer *tr)
- + * transfer data to/from the SPI device
- + *
- + */
- +
- +#ifndef _DRV_GENERIC_SPIDEV_H_
- +#define _DRV_GENERIC_SPIDEV_H_
- +
- +#include <linux/spi/spidev.h>
- +
- +int drv_generic_spidev_open(const char *section, const char *driver);
- +int drv_generic_spidev_close(void);
- +int drv_generic_spidev_transfer(const int count, struct spi_ioc_transfer *tr);
- +
- +#endif /* _DRV_GENERIC_SPIDEV_H_ */
- --- a/drivers.m4
- +++ b/drivers.m4
- @@ -301,6 +301,7 @@ PARPORT="no"
- SERIAL="no"
- I2C="no"
- KEYPAD="no"
- +SPIDEV="no"
-
- # generic libraries
- LIBUSB="no"
- @@ -936,6 +937,12 @@ if test "$LIBJPEG" = "yes"; then
- DRVLIBS="$DRVLIBS -ljpeg"
- fi
-
- +# generic spidev driver
- +if test "$SPIDEV" = "yes"; then
- + DRIVERS="$DRIVERS drv_generic_spidev.o"
- + AC_DEFINE(WITH_SPIDEV, 1, [SPIDEV driver])
- +fi
- +
- # libusb
- if test "$LIBUSB" = "yes"; then
- DRVLIBS="$DRVLIBS -lusb"
- --- a/configure.ac
- +++ b/configure.ac
- @@ -115,6 +115,9 @@ AC_ARG_WITH(outb,
-
- AC_CHECK_HEADERS([asm/io.h] [linux/parport.h linux/ppdev.h], [has_parport="true"], [has_parport="false"])
-
- +# check for spidev
- +AC_CHECK_HEADERS([linux/spi/spidev.h], [has_spidev="true"], [has_spidev="false"])
- +
- # drivers
- sinclude(drivers.m4)
-
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