Root/target/linux/lantiq/patches-2.6.39/140-falcon-easy98000-cpld-led.patch

1--- a/arch/mips/lantiq/falcon/Makefile
2+++ b/arch/mips/lantiq/falcon/Makefile
3@@ -1,3 +1,4 @@
4 obj-y := clk-falcon.o devices.o gpio.o prom.o sysctrl.o reset.o
5 obj-y += softdog_vpe.o
6 obj-$(CONFIG_LANTIQ_MACH_EASY98000) += mach-easy98000.o
7+obj-$(CONFIG_LANTIQ_MACH_EASY98000) += dev-leds-easy98000-cpld.o
8--- /dev/null
9+++ b/arch/mips/lantiq/falcon/dev-leds-easy98000-cpld.c
10@@ -0,0 +1,160 @@
11+/*
12+ * EASY98000 CPLD LED driver
13+ *
14+ * Copyright (C) 2010 Ralph Hempel <ralph.hempel@lantiq.com>
15+ *
16+ * This program is free software; you can redistribute it and/or modify it
17+ * under the terms of the GNU General Public License version 2 as published
18+ * by the Free Software Foundation.
19+ *
20+ */
21+
22+#include <linux/kernel.h>
23+#include <linux/version.h>
24+#include <linux/types.h>
25+#include <linux/init.h>
26+#include <linux/platform_device.h>
27+#include <linux/errno.h>
28+#include <linux/leds.h>
29+#include <linux/slab.h>
30+
31+#include "dev-leds-easy98000-cpld.h"
32+
33+const char *led_name[8] = {
34+ "ge0_act",
35+ "ge0_link",
36+ "ge1_act",
37+ "ge1_link",
38+ "fe2_act",
39+ "fe2_link",
40+ "fe3_act",
41+ "fe3_link"
42+};
43+
44+#define cpld_base7 ((u16 *)(KSEG1 | 0x17c0000c))
45+#define cpld_base8 ((u16 *)(KSEG1 | 0x17c00012))
46+
47+#define ltq_r16(reg) __raw_readw(reg)
48+#define ltq_w16(val, reg) __raw_writew(val, reg)
49+
50+struct cpld_led_dev {
51+ struct led_classdev cdev;
52+ u8 mask;
53+ u16 *base;
54+};
55+
56+struct cpld_led_drvdata {
57+ struct cpld_led_dev *led_devs;
58+ int num_leds;
59+};
60+
61+void led_set(u8 mask, u16 *base)
62+{
63+ ltq_w16(ltq_r16(base) | mask, base);
64+}
65+
66+void led_clear(u8 mask, u16 *base)
67+{
68+ ltq_w16(ltq_r16(base) & (~mask), base);
69+}
70+
71+void led_blink_clear(u8 mask, u16 *base)
72+{
73+ led_clear(mask, base);
74+}
75+
76+static void led_brightness(struct led_classdev *led_cdev,
77+ enum led_brightness value)
78+{
79+ struct cpld_led_dev *led_dev =
80+ container_of(led_cdev, struct cpld_led_dev, cdev);
81+
82+ if (value)
83+ led_set(led_dev->mask, led_dev->base);
84+ else
85+ led_clear(led_dev->mask, led_dev->base);
86+}
87+
88+static int led_probe(struct platform_device *pdev)
89+{
90+ int i;
91+ char name[32];
92+ struct cpld_led_drvdata *drvdata;
93+ int ret = 0;
94+
95+ drvdata = kzalloc(sizeof(struct cpld_led_drvdata) +
96+ sizeof(struct cpld_led_dev) * MAX_LED,
97+ GFP_KERNEL);
98+ if (!drvdata)
99+ return -ENOMEM;
100+
101+ drvdata->led_devs = (struct cpld_led_dev *) &drvdata[1];
102+
103+ for (i = 0; i < MAX_LED; i++) {
104+ struct cpld_led_dev *led_dev = &drvdata->led_devs[i];
105+ led_dev->cdev.brightness_set = led_brightness;
106+ led_dev->cdev.default_trigger = NULL;
107+ led_dev->mask = 1 << (i % 8);
108+ if(i < 8) {
109+ sprintf(name, "easy98000-cpld:%s", led_name[i]);
110+ led_dev->base = cpld_base8;
111+ } else {
112+ sprintf(name, "easy98000-cpld:red:%d", i-8);
113+ led_dev->base = cpld_base7;
114+ }
115+ led_dev->cdev.name = name;
116+ ret = led_classdev_register(&pdev->dev, &led_dev->cdev);
117+ if (ret)
118+ goto err;
119+ }
120+ platform_set_drvdata(pdev, drvdata);
121+ return 0;
122+
123+err:
124+ printk("led_probe: 3\n");
125+ for (i = i - 1; i >= 0; i--)
126+ led_classdev_unregister(&drvdata->led_devs[i].cdev);
127+
128+ kfree(drvdata);
129+ return ret;
130+}
131+
132+static int led_remove(struct platform_device *pdev)
133+{
134+ int i;
135+ struct cpld_led_drvdata *drvdata = platform_get_drvdata(pdev);
136+ for (i = 0; i < MAX_LED; i++)
137+ led_classdev_unregister(&drvdata->led_devs[i].cdev);
138+ kfree(drvdata);
139+ return 0;
140+}
141+
142+static struct platform_driver led_driver = {
143+ .probe = led_probe,
144+ .remove = led_remove,
145+ .driver = {
146+ .name = LED_NAME,
147+ .owner = THIS_MODULE,
148+ },
149+};
150+
151+int __init easy98000_cpld_led_init(void)
152+{
153+ pr_info(LED_DESC ", Version " LED_VERSION
154+ " (c) Copyright 2011, Lantiq Deutschland GmbH\n");
155+ return platform_driver_register(&led_driver);
156+}
157+
158+void __exit easy98000_cpld_led_exit(void)
159+{
160+ platform_driver_unregister(&led_driver);
161+}
162+
163+module_init(easy98000_cpld_led_init);
164+module_exit(easy98000_cpld_led_exit);
165+
166+MODULE_DESCRIPTION(LED_NAME);
167+MODULE_DESCRIPTION(LED_DESC);
168+MODULE_AUTHOR("Ralph Hempel <ralph.hempel@lantiq.com>");
169+MODULE_LICENSE("GPL v2");
170+
171--- /dev/null
172+++ b/arch/mips/lantiq/falcon/dev-leds-easy98000-cpld.h
173@@ -0,0 +1,20 @@
174+/*
175+ * EASY98000 CPLD LED driver
176+ *
177+ * Copyright (C) 2010 Ralph Hempel <ralph.hempel@lantiq.com>
178+ *
179+ * This program is free software; you can redistribute it and/or modify it
180+ * under the terms of the GNU General Public License version 2 as published
181+ * by the Free Software Foundation.
182+ *
183+ */
184+#ifndef _INCLUDE_EASY98000_CPLD_LED_H_
185+#define _INCLUDE_EASY98000_CPLD_LED_H_
186+
187+#define LED_NAME "easy98000_cpld_led"
188+#define LED_DESC "EASY98000 LED driver"
189+#define LED_VERSION "1.0.0"
190+
191+#define MAX_LED 16
192+
193+#endif /* _INCLUDE_EASY98000_CPLD_LED_H_ */
194

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