dm: merge pushback and deferred bio lists
[linux-2.6] / drivers / leds / leds-fsg.c
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 <mach/hardware.h>
23 #include <asm/io.h>
24
25 static short __iomem *latch_address;
26 static unsigned short latch_value;
27
28
29 static void fsg_led_wlan_set(struct led_classdev *led_cdev,
30                              enum led_brightness value)
31 {
32         if (value) {
33                 latch_value &= ~(1 << FSG_LED_WLAN_BIT);
34                 *latch_address = latch_value;
35         } else {
36                 latch_value |=  (1 << FSG_LED_WLAN_BIT);
37                 *latch_address = latch_value;
38         }
39 }
40
41 static void fsg_led_wan_set(struct led_classdev *led_cdev,
42                             enum led_brightness value)
43 {
44         if (value) {
45                 latch_value &= ~(1 << FSG_LED_WAN_BIT);
46                 *latch_address = latch_value;
47         } else {
48                 latch_value |=  (1 << FSG_LED_WAN_BIT);
49                 *latch_address = latch_value;
50         }
51 }
52
53 static void fsg_led_sata_set(struct led_classdev *led_cdev,
54                              enum led_brightness value)
55 {
56         if (value) {
57                 latch_value &= ~(1 << FSG_LED_SATA_BIT);
58                 *latch_address = latch_value;
59         } else {
60                 latch_value |=  (1 << FSG_LED_SATA_BIT);
61                 *latch_address = latch_value;
62         }
63 }
64
65 static void fsg_led_usb_set(struct led_classdev *led_cdev,
66                             enum led_brightness value)
67 {
68         if (value) {
69                 latch_value &= ~(1 << FSG_LED_USB_BIT);
70                 *latch_address = latch_value;
71         } else {
72                 latch_value |=  (1 << FSG_LED_USB_BIT);
73                 *latch_address = latch_value;
74         }
75 }
76
77 static void fsg_led_sync_set(struct led_classdev *led_cdev,
78                              enum led_brightness value)
79 {
80         if (value) {
81                 latch_value &= ~(1 << FSG_LED_SYNC_BIT);
82                 *latch_address = latch_value;
83         } else {
84                 latch_value |=  (1 << FSG_LED_SYNC_BIT);
85                 *latch_address = latch_value;
86         }
87 }
88
89 static void fsg_led_ring_set(struct led_classdev *led_cdev,
90                              enum led_brightness value)
91 {
92         if (value) {
93                 latch_value &= ~(1 << FSG_LED_RING_BIT);
94                 *latch_address = latch_value;
95         } else {
96                 latch_value |=  (1 << FSG_LED_RING_BIT);
97                 *latch_address = latch_value;
98         }
99 }
100
101
102 static struct led_classdev fsg_wlan_led = {
103         .name                   = "fsg:blue:wlan",
104         .brightness_set         = fsg_led_wlan_set,
105         .flags                  = LED_CORE_SUSPENDRESUME,
106 };
107
108 static struct led_classdev fsg_wan_led = {
109         .name                   = "fsg:blue:wan",
110         .brightness_set         = fsg_led_wan_set,
111         .flags                  = LED_CORE_SUSPENDRESUME,
112 };
113
114 static struct led_classdev fsg_sata_led = {
115         .name                   = "fsg:blue:sata",
116         .brightness_set         = fsg_led_sata_set,
117         .flags                  = LED_CORE_SUSPENDRESUME,
118 };
119
120 static struct led_classdev fsg_usb_led = {
121         .name                   = "fsg:blue:usb",
122         .brightness_set         = fsg_led_usb_set,
123         .flags                  = LED_CORE_SUSPENDRESUME,
124 };
125
126 static struct led_classdev fsg_sync_led = {
127         .name                   = "fsg:blue:sync",
128         .brightness_set         = fsg_led_sync_set,
129         .flags                  = LED_CORE_SUSPENDRESUME,
130 };
131
132 static struct led_classdev fsg_ring_led = {
133         .name                   = "fsg:blue:ring",
134         .brightness_set         = fsg_led_ring_set,
135         .flags                  = LED_CORE_SUSPENDRESUME,
136 };
137
138
139 static int fsg_led_probe(struct platform_device *pdev)
140 {
141         int ret;
142
143         /* Map the LED chip select address space */
144         latch_address = (unsigned short *) ioremap(IXP4XX_EXP_BUS_BASE(2), 512);
145         if (!latch_address) {
146                 ret = -ENOMEM;
147                 goto failremap;
148         }
149
150         latch_value = 0xffff;
151         *latch_address = latch_value;
152
153         ret = led_classdev_register(&pdev->dev, &fsg_wlan_led);
154         if (ret < 0)
155                 goto failwlan;
156
157         ret = led_classdev_register(&pdev->dev, &fsg_wan_led);
158         if (ret < 0)
159                 goto failwan;
160
161         ret = led_classdev_register(&pdev->dev, &fsg_sata_led);
162         if (ret < 0)
163                 goto failsata;
164
165         ret = led_classdev_register(&pdev->dev, &fsg_usb_led);
166         if (ret < 0)
167                 goto failusb;
168
169         ret = led_classdev_register(&pdev->dev, &fsg_sync_led);
170         if (ret < 0)
171                 goto failsync;
172
173         ret = led_classdev_register(&pdev->dev, &fsg_ring_led);
174         if (ret < 0)
175                 goto failring;
176
177         return ret;
178
179  failring:
180         led_classdev_unregister(&fsg_sync_led);
181  failsync:
182         led_classdev_unregister(&fsg_usb_led);
183  failusb:
184         led_classdev_unregister(&fsg_sata_led);
185  failsata:
186         led_classdev_unregister(&fsg_wan_led);
187  failwan:
188         led_classdev_unregister(&fsg_wlan_led);
189  failwlan:
190         iounmap(latch_address);
191  failremap:
192
193         return ret;
194 }
195
196 static int fsg_led_remove(struct platform_device *pdev)
197 {
198         led_classdev_unregister(&fsg_wlan_led);
199         led_classdev_unregister(&fsg_wan_led);
200         led_classdev_unregister(&fsg_sata_led);
201         led_classdev_unregister(&fsg_usb_led);
202         led_classdev_unregister(&fsg_sync_led);
203         led_classdev_unregister(&fsg_ring_led);
204
205         iounmap(latch_address);
206
207         return 0;
208 }
209
210
211 static struct platform_driver fsg_led_driver = {
212         .probe          = fsg_led_probe,
213         .remove         = fsg_led_remove,
214         .driver         = {
215                 .name           = "fsg-led",
216         },
217 };
218
219
220 static int __init fsg_led_init(void)
221 {
222         return platform_driver_register(&fsg_led_driver);
223 }
224
225 static void __exit fsg_led_exit(void)
226 {
227         platform_driver_unregister(&fsg_led_driver);
228 }
229
230
231 module_init(fsg_led_init);
232 module_exit(fsg_led_exit);
233
234 MODULE_AUTHOR("Rod Whitby <rod@whitby.id.au>");
235 MODULE_DESCRIPTION("Freecom FSG-3 LED driver");
236 MODULE_LICENSE("GPL");