--- /dev/null
+#
+# Copyright (C) 2008-2010 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/kernel.mk
+
+PKG_NAME:=rotary-gpio-custom
+PKG_RELEASE:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define KernelPackage/rotary-gpio-custom
+ SUBMENU:=Other modules
+ TITLE:=Custom GPIO-based rotary encoder device
+ DEPENDS:=@GPIO_SUPPORT +kmod-input-gpio-encoder
+ FILES:=$(PKG_BUILD_DIR)/rotary-gpio-custom.ko
+ KCONFIG:=
+endef
+
+define KernelPackage/rotary-gpio-custom/description
+ Kernel module for register a custom rotary-gpio-encoder platform device.
+endef
+
+EXTRA_KCONFIG:= \
+ CONFIG_ROTARY_GPIO_CUSTOM=m
+
+EXTRA_CFLAGS:= \
+ $(patsubst CONFIG_%, -DCONFIG_%=1, $(patsubst %=m,%,$(filter %=m,$(EXTRA_KCONFIG)))) \
+ $(patsubst CONFIG_%, -DCONFIG_%=1, $(patsubst %=y,%,$(filter %=y,$(EXTRA_KCONFIG)))) \
+
+MAKE_OPTS:= \
+ ARCH="$(LINUX_KARCH)" \
+ CROSS_COMPILE="$(TARGET_CROSS)" \
+ SUBDIRS="$(PKG_BUILD_DIR)" \
+ EXTRA_CFLAGS="$(EXTRA_CFLAGS)" \
+ $(EXTRA_KCONFIG)
+
+define Build/Prepare
+ mkdir -p $(PKG_BUILD_DIR)
+ $(CP) ./src/* $(PKG_BUILD_DIR)/
+endef
+
+define Build/Compile
+ $(MAKE) -C "$(LINUX_DIR)" \
+ $(MAKE_OPTS) \
+ modules
+endef
+
+$(eval $(call KernelPackage,rotary-gpio-custom))
--- /dev/null
+/*
+ * Custom GPIO-based rotary driver
+ *
+ * Copyright (C) 2010 Claudio Mignanti <c.mignanti@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Strongly based on Custom GPIO-based I2C driver by:
+ * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * ---------------------------------------------------------------------------
+ *
+ * The behaviour of this driver can be altered by setting some parameters
+ * from the insmod command line.
+ *
+ * The following parameters are adjustable:
+ *
+ * bus0 These four arguments can be arrays of
+ * bus1 1-8 unsigned integers as follows:
+ * bus2
+ * bus3 <id>,<steps>,<axis>,<gpioa>,<gpiob>,<inverted>
+ *
+ *
+ * If this driver is built into the kernel, you can use the following kernel
+ * command line parameters, with the same values as the corresponding module
+ * parameters listed above:
+ *
+ * rotary-gpio-custom.bus0
+ * rotary-gpio-custom.bus1
+ * rotary-gpio-custom.bus2
+ * rotary-gpio-custom.bus3
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/rotary_encoder.h>
+
+#define DRV_NAME "rotary-gpio-custom"
+#define DRV_DESC "Custom GPIO-based rotary driver"
+#define DRV_VERSION "0.1.0"
+
+#define PFX DRV_NAME ": "
+
+#define BUS_PARAM_REQUIRED 5
+#define BUS_PARAM_COUNT 6
+#define BUS_COUNT_MAX 4
+
+static unsigned int bus0[BUS_PARAM_COUNT] __initdata;
+static unsigned int bus1[BUS_PARAM_COUNT] __initdata;
+static unsigned int bus2[BUS_PARAM_COUNT] __initdata;
+static unsigned int bus3[BUS_PARAM_COUNT] __initdata;
+
+static unsigned int bus_nump[BUS_COUNT_MAX] __initdata;
+
+#define BUS_PARM_DESC \
+ " config -> id,steps,axis,gpioa,gpiob[,inverted]"
+
+module_param_array(bus0, uint, &bus_nump[0], 0);
+MODULE_PARM_DESC(bus0, "bus0" BUS_PARM_DESC);
+module_param_array(bus1, uint, &bus_nump[1], 0);
+MODULE_PARM_DESC(bus1, "bus1" BUS_PARM_DESC);
+module_param_array(bus2, uint, &bus_nump[2], 0);
+MODULE_PARM_DESC(bus2, "bus2" BUS_PARM_DESC);
+module_param_array(bus3, uint, &bus_nump[3], 0);
+MODULE_PARM_DESC(bus3, "bus3" BUS_PARM_DESC);
+
+static struct platform_device *devices[BUS_COUNT_MAX];
+static unsigned int nr_devices;
+
+static void rotary_gpio_custom_cleanup(void)
+{
+ int i;
+
+ for (i = 0; i < nr_devices; i++)
+ if (devices[i])
+ platform_device_put(devices[i]);
+}
+
+static int __init rotary_gpio_custom_add_one(unsigned int id, unsigned int *params)
+{
+ struct platform_device *pdev;
+ struct rotary_encoder_platform_data pdata;
+ int err;
+
+ if (!bus_nump[id])
+ return 0;
+
+ if (bus_nump[id] < BUS_PARAM_REQUIRED) {
+ printk(KERN_ERR PFX "not enough parameters for bus%d\n", id);
+ err = -EINVAL;
+ goto err;
+ }
+
+ pdev = platform_device_alloc("rotary-gpio", params[0]);
+ if (!pdev) {
+ err = -ENOMEM;
+ goto err;
+ }
+
+ pdata.steps = params[1];
+ pdata.axis = params[2];
+ pdata.relative_axis = false;
+ pdata.rollover = false;
+ pdata.gpio_a = params[3];
+ pdata.gpio_b = params[4];
+
+ if (params[5] == 1) {
+ pdata.inverted_a = 1;
+ pdata.inverted_b = 1;
+ } else {
+ pdata.inverted_a = 0;
+ pdata.inverted_b = 0;
+ }
+
+ err = platform_device_add_data(pdev, &pdata, sizeof(pdata));
+ if (err)
+ goto err_put;
+
+ err = platform_device_add(pdev);
+ if (err)
+ goto err_put;
+
+ devices[nr_devices++] = pdev;
+ return 0;
+
+err_put:
+ platform_device_put(pdev);
+err:
+ return err;
+}
+
+static int __init rotary_gpio_custom_probe(void)
+{
+ int err;
+
+ printk(KERN_INFO DRV_DESC " version " DRV_VERSION "\n");
+
+ err = rotary_gpio_custom_add_one(0, bus0);
+ if (err) goto err;
+
+ err = rotary_gpio_custom_add_one(1, bus1);
+ if (err) goto err;
+
+ err = rotary_gpio_custom_add_one(2, bus2);
+ if (err) goto err;
+
+ err = rotary_gpio_custom_add_one(3, bus3);
+ if (err) goto err;
+
+ if (!nr_devices) {
+ printk(KERN_ERR PFX "no bus parameter(s) specified\n");
+ err = -ENODEV;
+ goto err;
+ }
+
+ return 0;
+
+err:
+ rotary_gpio_custom_cleanup();
+ return err;
+}
+
+#ifdef MODULE
+static int __init rotary_gpio_custom_init(void)
+{
+ return rotary_gpio_custom_probe();
+}
+module_init(rotary_gpio_custom_init);
+
+static void __exit rotary_gpio_custom_exit(void)
+{
+ rotary_gpio_custom_cleanup();
+}
+module_exit(rotary_gpio_custom_exit);
+#else
+subsys_initcall(rotary_gpio_custom_probe);
+#endif /* MODULE*/
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org >");
+MODULE_AUTHOR("Claudio Mignanti <c.mignanti@gmail.com>");
+MODULE_DESCRIPTION(DRV_DESC);
+MODULE_VERSION(DRV_VERSION);
projects / openwrt.git / commitdiff