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195 lines
5.2 KiB
195 lines
5.2 KiB
--- a/Makefile.am
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+++ b/Makefile.am
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@@ -72,6 +72,8 @@ drv_generic_i2c.c \
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drv_generic_i2c.h \
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drv_generic_keypad.c \
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drv_generic_keypad.h \
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+drv_generic_spidev.c \
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+drv_generic_spidev.h \
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drv_ASTUSB.c \
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drv_BeckmannEgle.c \
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drv_BWCT.c \
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--- /dev/null
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+++ b/drv_generic_spidev.c
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@@ -0,0 +1,89 @@
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+/* $Id$
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+ * $URL$
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+ *
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+ * generic driver helper for displays connected via SPI bus
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+ *
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+ * Copyright (C) 2012 Gabor Juhos <juhosg@openwrt.org>
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+ *
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+ * This file is part of LCD4Linux.
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+ *
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+ * LCD4Linux is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2, or (at your option)
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+ * any later version.
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+ *
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+ * LCD4Linux is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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+ *
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+ */
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+
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+#include "config.h"
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+
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+#include <stdlib.h>
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+#include <stdio.h>
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+#include <string.h>
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+#include <errno.h>
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+#include <unistd.h>
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+#include <fcntl.h>
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+#include <sys/types.h>
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+#include <sys/ioctl.h>
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+
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+#include "debug.h"
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+#include "qprintf.h"
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+#include "cfg.h"
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+#include "drv_generic_spidev.h"
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+
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+static char *generic_spidev_section = "";
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+static char *generic_spidev_driver = "";
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+static int generic_spidev_fd;
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+
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+int drv_generic_spidev_open(const char *section, const char *driver)
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+{
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+ char *spidev;
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+
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+ udelay_init();
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+
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+ generic_spidev_section = (char *) section;
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+ generic_spidev_driver = (char *) driver;
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+
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+ spidev = cfg_get(generic_spidev_section, "Port", NULL);
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+
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+ info("%s: initializing SPI device %s", generic_spidev_driver, spidev);
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+ generic_spidev_fd = open(spidev, O_WRONLY);
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+ if (generic_spidev_fd < 0) {
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+ error("%s: unable to open SPI device %s!\n", generic_spidev_driver, spidev);
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+ goto exit_error;
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+ }
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+
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+ return 0;
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+
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+ exit_error:
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+ free(spidev);
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+ return -1;
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+}
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+
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+int drv_generic_spidev_close(void)
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+{
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+ close(generic_spidev_fd);
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+ return 0;
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+}
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+
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+int drv_generic_spidev_transfer(const int count, struct spi_ioc_transfer *tr)
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+{
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+ int ret;
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+
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+ ret = ioctl(generic_spidev_fd, SPI_IOC_MESSAGE(count), tr);
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+ if (ret < count) {
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+ error("%s: can't send SPI message! (%s)\n",
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+ generic_spidev_driver, strerror(errno));
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+ return -1;
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+ }
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+
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+ return 0;
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+}
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--- /dev/null
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+++ b/drv_generic_spidev.h
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@@ -0,0 +1,54 @@
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+/* $Id$
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+ * $URL$
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+ *
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+ * generic driver helper for displays connected via SPI bus
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+ *
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+ * Copyright (C) 2012 Gabor Juhos <juhosg@openwrt.org>
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+ * Copyright (C) 2012 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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+ *
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+ * This file is part of LCD4Linux.
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+ *
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+ * LCD4Linux is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2, or (at your option)
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+ * any later version.
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+ *
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+ * LCD4Linux is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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+ *
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+ */
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+
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+/*
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+ *
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+ * exported fuctions:
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+ *
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+ * int drv_generic_spidev_open (const char *section, const char *driver)
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+ * reads 'Port' entry from config and opens
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+ * the SPI device
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+ * returns 0 if ok, -1 on failure
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+ *
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+ * int drv_generic_spidev_close (void)
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+ * closes SPI device
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+ * returns 0 if ok, -1 on failure
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+ *
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+ * void drv_generic_spidev_transfer (int count, struct spi_ioc_transfer *tr)
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+ * transfer data to/from the SPI device
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+ *
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+ */
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+
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+#ifndef _DRV_GENERIC_SPIDEV_H_
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+#define _DRV_GENERIC_SPIDEV_H_
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+
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+#include <linux/spi/spidev.h>
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+
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+int drv_generic_spidev_open(const char *section, const char *driver);
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+int drv_generic_spidev_close(void);
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+int drv_generic_spidev_transfer(const int count, struct spi_ioc_transfer *tr);
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+
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+#endif /* _DRV_GENERIC_SPIDEV_H_ */
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--- a/drivers.m4
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+++ b/drivers.m4
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@@ -301,6 +301,7 @@ PARPORT="no"
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SERIAL="no"
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I2C="no"
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KEYPAD="no"
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+SPIDEV="no"
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# generic libraries
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LIBUSB="no"
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@@ -936,6 +937,12 @@ if test "$LIBJPEG" = "yes"; then
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DRVLIBS="$DRVLIBS -ljpeg"
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fi
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+# generic spidev driver
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+if test "$SPIDEV" = "yes"; then
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+ DRIVERS="$DRIVERS drv_generic_spidev.o"
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+ AC_DEFINE(WITH_SPIDEV, 1, [SPIDEV driver])
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+fi
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+
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# libusb
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if test "$LIBUSB" = "yes"; then
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DRVLIBS="$DRVLIBS -lusb"
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--- a/configure.ac
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+++ b/configure.ac
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@@ -115,6 +115,9 @@ AC_ARG_WITH(outb,
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AC_CHECK_HEADERS([asm/io.h] [linux/parport.h linux/ppdev.h], [has_parport="true"], [has_parport="false"])
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+# check for spidev
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+AC_CHECK_HEADERS([linux/spi/spidev.h], [has_spidev="true"], [has_spidev="false"])
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+
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# drivers
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sinclude(drivers.m4)
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