tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * LED Driver for the Freecom FSG-3
3 *
4 * Copyright (c) 2008 Rod Whitby <rod@whitby.id.au>
5 *
6 * Author: Rod Whitby <rod@whitby.id.au>
7 *
8 * Based on leds-spitz.c
9 * Copyright 2005-2006 Openedhand Ltd.
10 * Author: Richard Purdie <rpurdie@openedhand.com>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 *
16 */
17
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/platform_device.h>
21#include <linux/leds.h>
22#include <linux/module.h>
23#include <linux/io.h>
24#include <mach/hardware.h>
25
26#define FSG_LED_WLAN_BIT 0
27#define FSG_LED_WAN_BIT 1
28#define FSG_LED_SATA_BIT 2
29#define FSG_LED_USB_BIT 4
30#define FSG_LED_RING_BIT 5
31#define FSG_LED_SYNC_BIT 7
32
33static short __iomem *latch_address;
34static unsigned short latch_value;
35
36
37static void fsg_led_wlan_set(struct led_classdev *led_cdev,
38 enum led_brightness value)
39{
40 if (value) {
41 latch_value &= ~(1 << FSG_LED_WLAN_BIT);
42 *latch_address = latch_value;
43 } else {
44 latch_value |= (1 << FSG_LED_WLAN_BIT);
45 *latch_address = latch_value;
46 }
47}
48
49static void fsg_led_wan_set(struct led_classdev *led_cdev,
50 enum led_brightness value)
51{
52 if (value) {
53 latch_value &= ~(1 << FSG_LED_WAN_BIT);
54 *latch_address = latch_value;
55 } else {
56 latch_value |= (1 << FSG_LED_WAN_BIT);
57 *latch_address = latch_value;
58 }
59}
60
61static void fsg_led_sata_set(struct led_classdev *led_cdev,
62 enum led_brightness value)
63{
64 if (value) {
65 latch_value &= ~(1 << FSG_LED_SATA_BIT);
66 *latch_address = latch_value;
67 } else {
68 latch_value |= (1 << FSG_LED_SATA_BIT);
69 *latch_address = latch_value;
70 }
71}
72
73static void fsg_led_usb_set(struct led_classdev *led_cdev,
74 enum led_brightness value)
75{
76 if (value) {
77 latch_value &= ~(1 << FSG_LED_USB_BIT);
78 *latch_address = latch_value;
79 } else {
80 latch_value |= (1 << FSG_LED_USB_BIT);
81 *latch_address = latch_value;
82 }
83}
84
85static void fsg_led_sync_set(struct led_classdev *led_cdev,
86 enum led_brightness value)
87{
88 if (value) {
89 latch_value &= ~(1 << FSG_LED_SYNC_BIT);
90 *latch_address = latch_value;
91 } else {
92 latch_value |= (1 << FSG_LED_SYNC_BIT);
93 *latch_address = latch_value;
94 }
95}
96
97static void fsg_led_ring_set(struct led_classdev *led_cdev,
98 enum led_brightness value)
99{
100 if (value) {
101 latch_value &= ~(1 << FSG_LED_RING_BIT);
102 *latch_address = latch_value;
103 } else {
104 latch_value |= (1 << FSG_LED_RING_BIT);
105 *latch_address = latch_value;
106 }
107}
108
109
110static struct led_classdev fsg_wlan_led = {
111 .name = "fsg:blue:wlan",
112 .brightness_set = fsg_led_wlan_set,
113 .flags = LED_CORE_SUSPENDRESUME,
114};
115
116static struct led_classdev fsg_wan_led = {
117 .name = "fsg:blue:wan",
118 .brightness_set = fsg_led_wan_set,
119 .flags = LED_CORE_SUSPENDRESUME,
120};
121
122static struct led_classdev fsg_sata_led = {
123 .name = "fsg:blue:sata",
124 .brightness_set = fsg_led_sata_set,
125 .flags = LED_CORE_SUSPENDRESUME,
126};
127
128static struct led_classdev fsg_usb_led = {
129 .name = "fsg:blue:usb",
130 .brightness_set = fsg_led_usb_set,
131 .flags = LED_CORE_SUSPENDRESUME,
132};
133
134static struct led_classdev fsg_sync_led = {
135 .name = "fsg:blue:sync",
136 .brightness_set = fsg_led_sync_set,
137 .flags = LED_CORE_SUSPENDRESUME,
138};
139
140static struct led_classdev fsg_ring_led = {
141 .name = "fsg:blue:ring",
142 .brightness_set = fsg_led_ring_set,
143 .flags = LED_CORE_SUSPENDRESUME,
144};
145
146
147static int fsg_led_probe(struct platform_device *pdev)
148{
149 int ret;
150
151 /* Map the LED chip select address space */
152 latch_address = (unsigned short *) devm_ioremap(&pdev->dev,
153 IXP4XX_EXP_BUS_BASE(2), 512);
154 if (!latch_address)
155 return -ENOMEM;
156
157 latch_value = 0xffff;
158 *latch_address = latch_value;
159
160 ret = led_classdev_register(&pdev->dev, &fsg_wlan_led);
161 if (ret < 0)
162 goto failwlan;
163
164 ret = led_classdev_register(&pdev->dev, &fsg_wan_led);
165 if (ret < 0)
166 goto failwan;
167
168 ret = led_classdev_register(&pdev->dev, &fsg_sata_led);
169 if (ret < 0)
170 goto failsata;
171
172 ret = led_classdev_register(&pdev->dev, &fsg_usb_led);
173 if (ret < 0)
174 goto failusb;
175
176 ret = led_classdev_register(&pdev->dev, &fsg_sync_led);
177 if (ret < 0)
178 goto failsync;
179
180 ret = led_classdev_register(&pdev->dev, &fsg_ring_led);
181 if (ret < 0)
182 goto failring;
183
184 return ret;
185
186 failring:
187 led_classdev_unregister(&fsg_sync_led);
188 failsync:
189 led_classdev_unregister(&fsg_usb_led);
190 failusb:
191 led_classdev_unregister(&fsg_sata_led);
192 failsata:
193 led_classdev_unregister(&fsg_wan_led);
194 failwan:
195 led_classdev_unregister(&fsg_wlan_led);
196 failwlan:
197
198 return ret;
199}
200
201static int fsg_led_remove(struct platform_device *pdev)
202{
203 led_classdev_unregister(&fsg_wlan_led);
204 led_classdev_unregister(&fsg_wan_led);
205 led_classdev_unregister(&fsg_sata_led);
206 led_classdev_unregister(&fsg_usb_led);
207 led_classdev_unregister(&fsg_sync_led);
208 led_classdev_unregister(&fsg_ring_led);
209
210 return 0;
211}
212
213
214static struct platform_driver fsg_led_driver = {
215 .probe = fsg_led_probe,
216 .remove = fsg_led_remove,
217 .driver = {
218 .name = "fsg-led",
219 },
220};
221
222module_platform_driver(fsg_led_driver);
223
224MODULE_AUTHOR("Rod Whitby <rod@whitby.id.au>");
225MODULE_DESCRIPTION("Freecom FSG-3 LED driver");
226MODULE_LICENSE("GPL");