[ifxmips] adss 2.6.33 kernel patches, not defult yet as linux-atm breaks on 2.6.33

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20789 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ifxmips/files-2.6.33/drivers/leds/leds-ifxmips.c

@@ -0,0 +1,196 @@
+/*
+ *   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.
+ *
+ *   Copyright (C) 2006 infineon
+ *   Copyright (C) 2007 John Crispin <blogic@openwrt.org>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/uaccess.h>
+#include <linux/unistd.h>
+#include <linux/errno.h>
+#include <linux/leds.h>
+#include <linux/delay.h>
+
+#include <ifxmips.h>
+#include <ifxmips_gpio.h>
+#include <ifxmips_pmu.h>
+
+#define DRVNAME					"ifxmips_led"
+
+/* might need to be changed depending on shift register used on the pcb */
+#if 1
+#define IFXMIPS_LED_CLK_EDGE			IFXMIPS_LED_FALLING
+#else
+#define IFXMIPS_LED_CLK_EDGE			IFXMIPS_LED_RISING
+#endif
+
+#define IFXMIPS_LED_SPEED			IFXMIPS_LED_8HZ
+
+#define IFXMIPS_LED_GPIO_PORT			0
+
+#define IFXMIPS_MAX_LED				24
+
+struct ifxmips_led {
+	struct led_classdev cdev;
+	u8 bit;
+};
+
+void ifxmips_led_set(unsigned int led)
+{
+	led &= 0xffffff;
+	ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CPU0) | led, IFXMIPS_LED_CPU0);
+}
+EXPORT_SYMBOL(ifxmips_led_set);
+
+void ifxmips_led_clear(unsigned int led)
+{
+	led = ~(led & 0xffffff);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CPU0) & led, IFXMIPS_LED_CPU0);
+}
+EXPORT_SYMBOL(ifxmips_led_clear);
+
+void ifxmips_led_blink_set(unsigned int led)
+{
+	led &= 0xffffff;
+	ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) | led, IFXMIPS_LED_CON0);
+}
+EXPORT_SYMBOL(ifxmips_led_blink_set);
+
+void ifxmips_led_blink_clear(unsigned int led)
+{
+	led = ~(led & 0xffffff);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) & led, IFXMIPS_LED_CON0);
+}
+EXPORT_SYMBOL(ifxmips_led_blink_clear);
+
+static void ifxmips_ledapi_set(struct led_classdev *led_cdev,
+	enum led_brightness value)
+{
+	struct ifxmips_led *led_dev =
+		container_of(led_cdev, struct ifxmips_led, cdev);
+
+	if (value)
+		ifxmips_led_set(1 << led_dev->bit);
+	else
+		ifxmips_led_clear(1 << led_dev->bit);
+}
+
+void ifxmips_led_setup_gpio(void)
+{
+	int i = 0;
+
+	/* leds are controlled via a shift register
+	   we need to setup pins SH,D,ST (4,5,6) to make it work */
+	for (i = 4; i < 7; i++) {
+		ifxmips_port_set_altsel0(IFXMIPS_LED_GPIO_PORT, i);
+		ifxmips_port_clear_altsel1(IFXMIPS_LED_GPIO_PORT, i);
+		ifxmips_port_set_dir_out(IFXMIPS_LED_GPIO_PORT, i);
+		ifxmips_port_set_open_drain(IFXMIPS_LED_GPIO_PORT, i);
+	}
+}
+
+static int ifxmips_led_probe(struct platform_device *dev)
+{
+	int i = 0;
+
+	ifxmips_led_setup_gpio();
+
+	ifxmips_w32(0, IFXMIPS_LED_AR);
+	ifxmips_w32(0, IFXMIPS_LED_CPU0);
+	ifxmips_w32(0, IFXMIPS_LED_CPU1);
+	ifxmips_w32(LED_CON0_SWU, IFXMIPS_LED_CON0);
+	ifxmips_w32(0, IFXMIPS_LED_CON1);
+
+	/* setup the clock edge that the shift register is triggered on */
+	ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) & ~IFXMIPS_LED_EDGE_MASK,
+		IFXMIPS_LED_CON0);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) | IFXMIPS_LED_CLK_EDGE,
+		IFXMIPS_LED_CON0);
+
+	/* per default leds 15-0 are set */
+	ifxmips_w32(IFXMIPS_LED_GROUP1 | IFXMIPS_LED_GROUP0, IFXMIPS_LED_CON1);
+
+	/* leds are update periodically by the FPID */
+	ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1) & ~IFXMIPS_LED_UPD_MASK,
+		IFXMIPS_LED_CON1);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1) | IFXMIPS_LED_UPD_SRC_FPI,
+		IFXMIPS_LED_CON1);
+
+	/* set led update speed */
+	ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1) & ~IFXMIPS_LED_MASK,
+		IFXMIPS_LED_CON1);
+	ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON1) | IFXMIPS_LED_SPEED,
+		IFXMIPS_LED_CON1);
+
+	/* adsl 0 and 1 leds are updated by the arc */
+	ifxmips_w32(ifxmips_r32(IFXMIPS_LED_CON0) | IFXMIPS_LED_ADSL_SRC,
+		IFXMIPS_LED_CON0);
+
+	/* per default, the leds are turned on */
+	ifxmips_pmu_enable(IFXMIPS_PMU_PWDCR_LED);
+
+	for (i = 0; i < IFXMIPS_MAX_LED; i++) {
+		struct ifxmips_led *tmp =
+			kzalloc(sizeof(struct ifxmips_led), GFP_KERNEL);
+		tmp->cdev.brightness_set = ifxmips_ledapi_set;
+		tmp->cdev.name = kmalloc(sizeof("ifxmips:led:00"), GFP_KERNEL);
+		sprintf((char *)tmp->cdev.name, "ifxmips:led:%02d", i);
+		tmp->cdev.default_trigger = NULL;
+		tmp->bit = i;
+		led_classdev_register(&dev->dev, &tmp->cdev);
+	}
+
+	return 0;
+}
+
+static int ifxmips_led_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static struct platform_driver ifxmips_led_driver = {
+	.probe = ifxmips_led_probe,
+	.remove = ifxmips_led_remove,
+	.driver = {
+		.name = DRVNAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+int __init ifxmips_led_init(void)
+{
+	int ret = platform_driver_register(&ifxmips_led_driver);
+	if (ret)
+		printk(KERN_INFO
+			"ifxmips_led: Error registering platfom driver!");
+
+	return ret;
+}
+
+void __exit ifxmips_led_exit(void)
+{
+	platform_driver_unregister(&ifxmips_led_driver);
+}
+
+module_init(ifxmips_led_init);
+module_exit(ifxmips_led_exit);