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1 | /* leds-sunfire.c: SUNW,Ultra-Enterprise LED driver. |
2 | * |
3 | * Copyright (C) 2008 David S. Miller <davem@davemloft.net> |
4 | */ |
5 | |
6 | #include <linux/kernel.h> |
7 | #include <linux/module.h> |
8 | #include <linux/init.h> |
9 | #include <linux/leds.h> |
10 | #include <linux/io.h> |
11 | #include <linux/platform_device.h> |
12 | #include <linux/slab.h> |
13 | |
14 | #include <asm/fhc.h> |
15 | #include <asm/upa.h> |
16 | |
17 | #define DRIVER_NAME "leds-sunfire" |
18 | #define PFX DRIVER_NAME ": " |
19 | |
20 | MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); |
21 | MODULE_DESCRIPTION("Sun Fire LED driver"); |
22 | MODULE_LICENSE("GPL"); |
23 | |
24 | struct sunfire_led { |
25 | struct led_classdev led_cdev; |
26 | void __iomem *reg; |
27 | }; |
28 | #define to_sunfire_led(d) container_of(d, struct sunfire_led, led_cdev) |
29 | |
30 | static void __clockboard_set(struct led_classdev *led_cdev, |
31 | enum led_brightness led_val, u8 bit) |
32 | { |
33 | struct sunfire_led *p = to_sunfire_led(led_cdev); |
34 | u8 reg = upa_readb(p->reg); |
35 | |
36 | switch (bit) { |
37 | case CLOCK_CTRL_LLED: |
38 | if (led_val) |
39 | reg &= ~bit; |
40 | else |
41 | reg |= bit; |
42 | break; |
43 | |
44 | default: |
45 | if (led_val) |
46 | reg |= bit; |
47 | else |
48 | reg &= ~bit; |
49 | break; |
50 | } |
51 | upa_writeb(reg, p->reg); |
52 | } |
53 | |
54 | static void clockboard_left_set(struct led_classdev *led_cdev, |
55 | enum led_brightness led_val) |
56 | { |
57 | __clockboard_set(led_cdev, led_val, CLOCK_CTRL_LLED); |
58 | } |
59 | |
60 | static void clockboard_middle_set(struct led_classdev *led_cdev, |
61 | enum led_brightness led_val) |
62 | { |
63 | __clockboard_set(led_cdev, led_val, CLOCK_CTRL_MLED); |
64 | } |
65 | |
66 | static void clockboard_right_set(struct led_classdev *led_cdev, |
67 | enum led_brightness led_val) |
68 | { |
69 | __clockboard_set(led_cdev, led_val, CLOCK_CTRL_RLED); |
70 | } |
71 | |
72 | static void __fhc_set(struct led_classdev *led_cdev, |
73 | enum led_brightness led_val, u32 bit) |
74 | { |
75 | struct sunfire_led *p = to_sunfire_led(led_cdev); |
76 | u32 reg = upa_readl(p->reg); |
77 | |
78 | switch (bit) { |
79 | case FHC_CONTROL_LLED: |
80 | if (led_val) |
81 | reg &= ~bit; |
82 | else |
83 | reg |= bit; |
84 | break; |
85 | |
86 | default: |
87 | if (led_val) |
88 | reg |= bit; |
89 | else |
90 | reg &= ~bit; |
91 | break; |
92 | } |
93 | upa_writel(reg, p->reg); |
94 | } |
95 | |
96 | static void fhc_left_set(struct led_classdev *led_cdev, |
97 | enum led_brightness led_val) |
98 | { |
99 | __fhc_set(led_cdev, led_val, FHC_CONTROL_LLED); |
100 | } |
101 | |
102 | static void fhc_middle_set(struct led_classdev *led_cdev, |
103 | enum led_brightness led_val) |
104 | { |
105 | __fhc_set(led_cdev, led_val, FHC_CONTROL_MLED); |
106 | } |
107 | |
108 | static void fhc_right_set(struct led_classdev *led_cdev, |
109 | enum led_brightness led_val) |
110 | { |
111 | __fhc_set(led_cdev, led_val, FHC_CONTROL_RLED); |
112 | } |
113 | |
114 | typedef void (*set_handler)(struct led_classdev *, enum led_brightness); |
115 | struct led_type { |
116 | const char *name; |
117 | set_handler handler; |
118 | const char *default_trigger; |
119 | }; |
120 | |
121 | #define NUM_LEDS_PER_BOARD 3 |
122 | struct sunfire_drvdata { |
123 | struct sunfire_led leds[NUM_LEDS_PER_BOARD]; |
124 | }; |
125 | |
126 | static int __devinit sunfire_led_generic_probe(struct platform_device *pdev, |
127 | struct led_type *types) |
128 | { |
129 | struct sunfire_drvdata *p; |
130 | int i, err; |
131 | |
132 | if (pdev->num_resources != 1) { |
133 | printk(KERN_ERR PFX "Wrong number of resources %d, should be 1\n", |
134 | pdev->num_resources); |
135 | err = -EINVAL; |
136 | goto out; |
137 | } |
138 | |
139 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
140 | if (!p) { |
141 | printk(KERN_ERR PFX "Could not allocate struct sunfire_drvdata\n"); |
142 | err = -ENOMEM; |
143 | goto out; |
144 | } |
145 | |
146 | for (i = 0; i < NUM_LEDS_PER_BOARD; i++) { |
147 | struct led_classdev *lp = &p->leds[i].led_cdev; |
148 | |
149 | p->leds[i].reg = (void __iomem *) pdev->resource[0].start; |
150 | lp->name = types[i].name; |
151 | lp->brightness = LED_FULL; |
152 | lp->brightness_set = types[i].handler; |
153 | lp->default_trigger = types[i].default_trigger; |
154 | |
155 | err = led_classdev_register(&pdev->dev, lp); |
156 | if (err) { |
157 | printk(KERN_ERR PFX "Could not register %s LED\n", |
158 | lp->name); |
159 | goto out_unregister_led_cdevs; |
160 | } |
161 | } |
162 | |
163 | dev_set_drvdata(&pdev->dev, p); |
164 | |
165 | return 0; |
166 | |
167 | out_unregister_led_cdevs: |
168 | for (i--; i >= 0; i--) |
169 | led_classdev_unregister(&p->leds[i].led_cdev); |
170 | kfree(p); |
171 | out: |
172 | return err; |
173 | } |
174 | |
175 | static int __devexit sunfire_led_generic_remove(struct platform_device *pdev) |
176 | { |
177 | struct sunfire_drvdata *p = dev_get_drvdata(&pdev->dev); |
178 | int i; |
179 | |
180 | for (i = 0; i < NUM_LEDS_PER_BOARD; i++) |
181 | led_classdev_unregister(&p->leds[i].led_cdev); |
182 | |
183 | kfree(p); |
184 | |
185 | return 0; |
186 | } |
187 | |
188 | static struct led_type clockboard_led_types[NUM_LEDS_PER_BOARD] = { |
189 | { |
190 | .name = "clockboard-left", |
191 | .handler = clockboard_left_set, |
192 | }, |
193 | { |
194 | .name = "clockboard-middle", |
195 | .handler = clockboard_middle_set, |
196 | }, |
197 | { |
198 | .name = "clockboard-right", |
199 | .handler = clockboard_right_set, |
200 | .default_trigger= "heartbeat", |
201 | }, |
202 | }; |
203 | |
204 | static int __devinit sunfire_clockboard_led_probe(struct platform_device *pdev) |
205 | { |
206 | return sunfire_led_generic_probe(pdev, clockboard_led_types); |
207 | } |
208 | |
209 | static struct led_type fhc_led_types[NUM_LEDS_PER_BOARD] = { |
210 | { |
211 | .name = "fhc-left", |
212 | .handler = fhc_left_set, |
213 | }, |
214 | { |
215 | .name = "fhc-middle", |
216 | .handler = fhc_middle_set, |
217 | }, |
218 | { |
219 | .name = "fhc-right", |
220 | .handler = fhc_right_set, |
221 | .default_trigger= "heartbeat", |
222 | }, |
223 | }; |
224 | |
225 | static int __devinit sunfire_fhc_led_probe(struct platform_device *pdev) |
226 | { |
227 | return sunfire_led_generic_probe(pdev, fhc_led_types); |
228 | } |
229 | |
230 | MODULE_ALIAS("platform:sunfire-clockboard-leds"); |
231 | MODULE_ALIAS("platform:sunfire-fhc-leds"); |
232 | |
233 | static struct platform_driver sunfire_clockboard_led_driver = { |
234 | .probe = sunfire_clockboard_led_probe, |
235 | .remove = __devexit_p(sunfire_led_generic_remove), |
236 | .driver = { |
237 | .name = "sunfire-clockboard-leds", |
238 | .owner = THIS_MODULE, |
239 | }, |
240 | }; |
241 | |
242 | static struct platform_driver sunfire_fhc_led_driver = { |
243 | .probe = sunfire_fhc_led_probe, |
244 | .remove = __devexit_p(sunfire_led_generic_remove), |
245 | .driver = { |
246 | .name = "sunfire-fhc-leds", |
247 | .owner = THIS_MODULE, |
248 | }, |
249 | }; |
250 | |
251 | static int __init sunfire_leds_init(void) |
252 | { |
253 | int err = platform_driver_register(&sunfire_clockboard_led_driver); |
254 | |
255 | if (err) { |
256 | printk(KERN_ERR PFX "Could not register clock board LED driver\n"); |
257 | return err; |
258 | } |
259 | |
260 | err = platform_driver_register(&sunfire_fhc_led_driver); |
261 | if (err) { |
262 | printk(KERN_ERR PFX "Could not register FHC LED driver\n"); |
263 | platform_driver_unregister(&sunfire_clockboard_led_driver); |
264 | } |
265 | |
266 | return err; |
267 | } |
268 | |
269 | static void __exit sunfire_leds_exit(void) |
270 | { |
271 | platform_driver_unregister(&sunfire_clockboard_led_driver); |
272 | platform_driver_unregister(&sunfire_fhc_led_driver); |
273 | } |
274 | |
275 | module_init(sunfire_leds_init); |
276 | module_exit(sunfire_leds_exit); |
277 |
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