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5843492c DM |
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> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
5843492c DM |
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 | ||
98ea1ea2 | 126 | static int sunfire_led_generic_probe(struct platform_device *pdev, |
5843492c DM |
127 | struct led_type *types) |
128 | { | |
129 | struct sunfire_drvdata *p; | |
e179840b | 130 | int i, err; |
5843492c DM |
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); | |
234699a8 | 135 | return -EINVAL; |
5843492c DM |
136 | } |
137 | ||
234699a8 | 138 | p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL); |
5843492c DM |
139 | if (!p) { |
140 | printk(KERN_ERR PFX "Could not allocate struct sunfire_drvdata\n"); | |
234699a8 | 141 | return -ENOMEM; |
5843492c DM |
142 | } |
143 | ||
144 | for (i = 0; i < NUM_LEDS_PER_BOARD; i++) { | |
145 | struct led_classdev *lp = &p->leds[i].led_cdev; | |
146 | ||
147 | p->leds[i].reg = (void __iomem *) pdev->resource[0].start; | |
148 | lp->name = types[i].name; | |
149 | lp->brightness = LED_FULL; | |
150 | lp->brightness_set = types[i].handler; | |
151 | lp->default_trigger = types[i].default_trigger; | |
152 | ||
153 | err = led_classdev_register(&pdev->dev, lp); | |
154 | if (err) { | |
155 | printk(KERN_ERR PFX "Could not register %s LED\n", | |
156 | lp->name); | |
234699a8 BW |
157 | for (i--; i >= 0; i--) |
158 | led_classdev_unregister(&p->leds[i].led_cdev); | |
159 | return err; | |
5843492c DM |
160 | } |
161 | } | |
162 | ||
163 | dev_set_drvdata(&pdev->dev, p); | |
164 | ||
e179840b | 165 | return 0; |
5843492c DM |
166 | } |
167 | ||
678e8a6b | 168 | static int sunfire_led_generic_remove(struct platform_device *pdev) |
5843492c DM |
169 | { |
170 | struct sunfire_drvdata *p = dev_get_drvdata(&pdev->dev); | |
171 | int i; | |
172 | ||
173 | for (i = 0; i < NUM_LEDS_PER_BOARD; i++) | |
174 | led_classdev_unregister(&p->leds[i].led_cdev); | |
175 | ||
5843492c DM |
176 | return 0; |
177 | } | |
178 | ||
179 | static struct led_type clockboard_led_types[NUM_LEDS_PER_BOARD] = { | |
180 | { | |
181 | .name = "clockboard-left", | |
182 | .handler = clockboard_left_set, | |
183 | }, | |
184 | { | |
185 | .name = "clockboard-middle", | |
186 | .handler = clockboard_middle_set, | |
187 | }, | |
188 | { | |
189 | .name = "clockboard-right", | |
190 | .handler = clockboard_right_set, | |
191 | .default_trigger= "heartbeat", | |
192 | }, | |
193 | }; | |
194 | ||
98ea1ea2 | 195 | static int sunfire_clockboard_led_probe(struct platform_device *pdev) |
5843492c DM |
196 | { |
197 | return sunfire_led_generic_probe(pdev, clockboard_led_types); | |
198 | } | |
199 | ||
200 | static struct led_type fhc_led_types[NUM_LEDS_PER_BOARD] = { | |
201 | { | |
202 | .name = "fhc-left", | |
203 | .handler = fhc_left_set, | |
204 | }, | |
205 | { | |
206 | .name = "fhc-middle", | |
207 | .handler = fhc_middle_set, | |
208 | }, | |
209 | { | |
210 | .name = "fhc-right", | |
211 | .handler = fhc_right_set, | |
212 | .default_trigger= "heartbeat", | |
213 | }, | |
214 | }; | |
215 | ||
98ea1ea2 | 216 | static int sunfire_fhc_led_probe(struct platform_device *pdev) |
5843492c DM |
217 | { |
218 | return sunfire_led_generic_probe(pdev, fhc_led_types); | |
219 | } | |
220 | ||
221 | MODULE_ALIAS("platform:sunfire-clockboard-leds"); | |
222 | MODULE_ALIAS("platform:sunfire-fhc-leds"); | |
223 | ||
224 | static struct platform_driver sunfire_clockboard_led_driver = { | |
225 | .probe = sunfire_clockboard_led_probe, | |
df07cf81 | 226 | .remove = sunfire_led_generic_remove, |
5843492c DM |
227 | .driver = { |
228 | .name = "sunfire-clockboard-leds", | |
229 | .owner = THIS_MODULE, | |
230 | }, | |
231 | }; | |
232 | ||
233 | static struct platform_driver sunfire_fhc_led_driver = { | |
234 | .probe = sunfire_fhc_led_probe, | |
df07cf81 | 235 | .remove = sunfire_led_generic_remove, |
5843492c DM |
236 | .driver = { |
237 | .name = "sunfire-fhc-leds", | |
238 | .owner = THIS_MODULE, | |
239 | }, | |
240 | }; | |
241 | ||
242 | static int __init sunfire_leds_init(void) | |
243 | { | |
244 | int err = platform_driver_register(&sunfire_clockboard_led_driver); | |
245 | ||
246 | if (err) { | |
247 | printk(KERN_ERR PFX "Could not register clock board LED driver\n"); | |
248 | return err; | |
249 | } | |
250 | ||
251 | err = platform_driver_register(&sunfire_fhc_led_driver); | |
252 | if (err) { | |
253 | printk(KERN_ERR PFX "Could not register FHC LED driver\n"); | |
254 | platform_driver_unregister(&sunfire_clockboard_led_driver); | |
255 | } | |
256 | ||
257 | return err; | |
258 | } | |
259 | ||
260 | static void __exit sunfire_leds_exit(void) | |
261 | { | |
262 | platform_driver_unregister(&sunfire_clockboard_led_driver); | |
263 | platform_driver_unregister(&sunfire_fhc_led_driver); | |
264 | } | |
265 | ||
266 | module_init(sunfire_leds_init); | |
267 | module_exit(sunfire_leds_exit); |