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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
20MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
21MODULE_DESCRIPTION("Sun Fire LED driver");
22MODULE_LICENSE("GPL");
23
24struct 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
30static 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
54static 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
60static 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
66static 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
72static 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
96static 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
102static 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
108static 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
114typedef void (*set_handler)(struct led_classdev *, enum led_brightness);
115struct led_type {
116 const char *name;
117 set_handler handler;
118 const char *default_trigger;
119};
120
121#define NUM_LEDS_PER_BOARD 3
122struct sunfire_drvdata {
123 struct sunfire_led leds[NUM_LEDS_PER_BOARD];
124};
125
126static 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 = -EINVAL;
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 goto out;
136 }
137
138 p = kzalloc(sizeof(*p), GFP_KERNEL);
139 if (!p) {
140 printk(KERN_ERR PFX "Could not allocate struct sunfire_drvdata\n");
141 goto out;
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);
157 goto out_unregister_led_cdevs;
158 }
159 }
160
161 dev_set_drvdata(&pdev->dev, p);
162
163 err = 0;
164out:
165 return err;
166
167out_unregister_led_cdevs:
168 for (i--; i >= 0; i--)
169 led_classdev_unregister(&p->leds[i].led_cdev);
170 goto out;
171}
172
173static int __devexit sunfire_led_generic_remove(struct platform_device *pdev)
174{
175 struct sunfire_drvdata *p = dev_get_drvdata(&pdev->dev);
176 int i;
177
178 for (i = 0; i < NUM_LEDS_PER_BOARD; i++)
179 led_classdev_unregister(&p->leds[i].led_cdev);
180
181 kfree(p);
182
183 return 0;
184}
185
186static struct led_type clockboard_led_types[NUM_LEDS_PER_BOARD] = {
187 {
188 .name = "clockboard-left",
189 .handler = clockboard_left_set,
190 },
191 {
192 .name = "clockboard-middle",
193 .handler = clockboard_middle_set,
194 },
195 {
196 .name = "clockboard-right",
197 .handler = clockboard_right_set,
198 .default_trigger= "heartbeat",
199 },
200};
201
202static int __devinit sunfire_clockboard_led_probe(struct platform_device *pdev)
203{
204 return sunfire_led_generic_probe(pdev, clockboard_led_types);
205}
206
207static struct led_type fhc_led_types[NUM_LEDS_PER_BOARD] = {
208 {
209 .name = "fhc-left",
210 .handler = fhc_left_set,
211 },
212 {
213 .name = "fhc-middle",
214 .handler = fhc_middle_set,
215 },
216 {
217 .name = "fhc-right",
218 .handler = fhc_right_set,
219 .default_trigger= "heartbeat",
220 },
221};
222
223static int __devinit sunfire_fhc_led_probe(struct platform_device *pdev)
224{
225 return sunfire_led_generic_probe(pdev, fhc_led_types);
226}
227
228MODULE_ALIAS("platform:sunfire-clockboard-leds");
229MODULE_ALIAS("platform:sunfire-fhc-leds");
230
231static struct platform_driver sunfire_clockboard_led_driver = {
232 .probe = sunfire_clockboard_led_probe,
233 .remove = __devexit_p(sunfire_led_generic_remove),
234 .driver = {
235 .name = "sunfire-clockboard-leds",
236 .owner = THIS_MODULE,
237 },
238};
239
240static struct platform_driver sunfire_fhc_led_driver = {
241 .probe = sunfire_fhc_led_probe,
242 .remove = __devexit_p(sunfire_led_generic_remove),
243 .driver = {
244 .name = "sunfire-fhc-leds",
245 .owner = THIS_MODULE,
246 },
247};
248
249static int __init sunfire_leds_init(void)
250{
251 int err = platform_driver_register(&sunfire_clockboard_led_driver);
252
253 if (err) {
254 printk(KERN_ERR PFX "Could not register clock board LED driver\n");
255 return err;
256 }
257
258 err = platform_driver_register(&sunfire_fhc_led_driver);
259 if (err) {
260 printk(KERN_ERR PFX "Could not register FHC LED driver\n");
261 platform_driver_unregister(&sunfire_clockboard_led_driver);
262 }
263
264 return err;
265}
266
267static void __exit sunfire_leds_exit(void)
268{
269 platform_driver_unregister(&sunfire_clockboard_led_driver);
270 platform_driver_unregister(&sunfire_fhc_led_driver);
271}
272
273module_init(sunfire_leds_init);
274module_exit(sunfire_leds_exit);
275
