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