Rod Whitby | 3b2e46f | 2008-04-24 23:43:09 +0100 | [diff] [blame^] | 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 <asm/arch/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 | |
| 103 | static struct led_classdev fsg_wlan_led = { |
| 104 | .name = "fsg:blue:wlan", |
| 105 | .brightness_set = fsg_led_wlan_set, |
| 106 | }; |
| 107 | |
| 108 | static struct led_classdev fsg_wan_led = { |
| 109 | .name = "fsg:blue:wan", |
| 110 | .brightness_set = fsg_led_wan_set, |
| 111 | }; |
| 112 | |
| 113 | static struct led_classdev fsg_sata_led = { |
| 114 | .name = "fsg:blue:sata", |
| 115 | .brightness_set = fsg_led_sata_set, |
| 116 | }; |
| 117 | |
| 118 | static struct led_classdev fsg_usb_led = { |
| 119 | .name = "fsg:blue:usb", |
| 120 | .brightness_set = fsg_led_usb_set, |
| 121 | }; |
| 122 | |
| 123 | static struct led_classdev fsg_sync_led = { |
| 124 | .name = "fsg:blue:sync", |
| 125 | .brightness_set = fsg_led_sync_set, |
| 126 | }; |
| 127 | |
| 128 | static struct led_classdev fsg_ring_led = { |
| 129 | .name = "fsg:blue:ring", |
| 130 | .brightness_set = fsg_led_ring_set, |
| 131 | }; |
| 132 | |
| 133 | |
| 134 | |
| 135 | #ifdef CONFIG_PM |
| 136 | static int fsg_led_suspend(struct platform_device *dev, pm_message_t state) |
| 137 | { |
| 138 | led_classdev_suspend(&fsg_wlan_led); |
| 139 | led_classdev_suspend(&fsg_wan_led); |
| 140 | led_classdev_suspend(&fsg_sata_led); |
| 141 | led_classdev_suspend(&fsg_usb_led); |
| 142 | led_classdev_suspend(&fsg_sync_led); |
| 143 | led_classdev_suspend(&fsg_ring_led); |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | static int fsg_led_resume(struct platform_device *dev) |
| 148 | { |
| 149 | led_classdev_resume(&fsg_wlan_led); |
| 150 | led_classdev_resume(&fsg_wan_led); |
| 151 | led_classdev_resume(&fsg_sata_led); |
| 152 | led_classdev_resume(&fsg_usb_led); |
| 153 | led_classdev_resume(&fsg_sync_led); |
| 154 | led_classdev_resume(&fsg_ring_led); |
| 155 | return 0; |
| 156 | } |
| 157 | #endif |
| 158 | |
| 159 | |
| 160 | static int fsg_led_probe(struct platform_device *pdev) |
| 161 | { |
| 162 | int ret; |
| 163 | |
| 164 | ret = led_classdev_register(&pdev->dev, &fsg_wlan_led); |
| 165 | if (ret < 0) |
| 166 | goto failwlan; |
| 167 | |
| 168 | ret = led_classdev_register(&pdev->dev, &fsg_wan_led); |
| 169 | if (ret < 0) |
| 170 | goto failwan; |
| 171 | |
| 172 | ret = led_classdev_register(&pdev->dev, &fsg_sata_led); |
| 173 | if (ret < 0) |
| 174 | goto failsata; |
| 175 | |
| 176 | ret = led_classdev_register(&pdev->dev, &fsg_usb_led); |
| 177 | if (ret < 0) |
| 178 | goto failusb; |
| 179 | |
| 180 | ret = led_classdev_register(&pdev->dev, &fsg_sync_led); |
| 181 | if (ret < 0) |
| 182 | goto failsync; |
| 183 | |
| 184 | ret = led_classdev_register(&pdev->dev, &fsg_ring_led); |
| 185 | if (ret < 0) |
| 186 | goto failring; |
| 187 | |
| 188 | /* Map the LED chip select address space */ |
| 189 | latch_address = (unsigned short *) ioremap(IXP4XX_EXP_BUS_BASE(2), 512); |
| 190 | if (!latch_address) { |
| 191 | ret = -ENOMEM; |
| 192 | goto failremap; |
| 193 | } |
| 194 | |
| 195 | latch_value = 0xffff; |
| 196 | *latch_address = latch_value; |
| 197 | |
| 198 | return ret; |
| 199 | |
| 200 | failremap: |
| 201 | led_classdev_unregister(&fsg_ring_led); |
| 202 | failring: |
| 203 | led_classdev_unregister(&fsg_sync_led); |
| 204 | failsync: |
| 205 | led_classdev_unregister(&fsg_usb_led); |
| 206 | failusb: |
| 207 | led_classdev_unregister(&fsg_sata_led); |
| 208 | failsata: |
| 209 | led_classdev_unregister(&fsg_wan_led); |
| 210 | failwan: |
| 211 | led_classdev_unregister(&fsg_wlan_led); |
| 212 | failwlan: |
| 213 | |
| 214 | return ret; |
| 215 | } |
| 216 | |
| 217 | static int fsg_led_remove(struct platform_device *pdev) |
| 218 | { |
| 219 | iounmap(latch_address); |
| 220 | |
| 221 | led_classdev_unregister(&fsg_wlan_led); |
| 222 | led_classdev_unregister(&fsg_wan_led); |
| 223 | led_classdev_unregister(&fsg_sata_led); |
| 224 | led_classdev_unregister(&fsg_usb_led); |
| 225 | led_classdev_unregister(&fsg_sync_led); |
| 226 | led_classdev_unregister(&fsg_ring_led); |
| 227 | |
| 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | |
| 232 | static struct platform_driver fsg_led_driver = { |
| 233 | .probe = fsg_led_probe, |
| 234 | .remove = fsg_led_remove, |
| 235 | #ifdef CONFIG_PM |
| 236 | .suspend = fsg_led_suspend, |
| 237 | .resume = fsg_led_resume, |
| 238 | #endif |
| 239 | .driver = { |
| 240 | .name = "fsg-led", |
| 241 | }, |
| 242 | }; |
| 243 | |
| 244 | |
| 245 | static int __init fsg_led_init(void) |
| 246 | { |
| 247 | return platform_driver_register(&fsg_led_driver); |
| 248 | } |
| 249 | |
| 250 | static void __exit fsg_led_exit(void) |
| 251 | { |
| 252 | platform_driver_unregister(&fsg_led_driver); |
| 253 | } |
| 254 | |
| 255 | |
| 256 | module_init(fsg_led_init); |
| 257 | module_exit(fsg_led_exit); |
| 258 | |
| 259 | MODULE_AUTHOR("Rod Whitby <rod@whitby.id.au>"); |
| 260 | MODULE_DESCRIPTION("Freecom FSG-3 LED driver"); |
| 261 | MODULE_LICENSE("GPL"); |