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David S. Miller58434922008-08-31 20:26:48 -07001/* 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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090012#include <linux/slab.h>
David S. Miller58434922008-08-31 20:26:48 -070013
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;
Axel Line179840b2011-07-25 17:13:16 -0700130 int i, err;
David S. Miller58434922008-08-31 20:26:48 -0700131
132 if (pdev->num_resources != 1) {
133 printk(KERN_ERR PFX "Wrong number of resources %d, should be 1\n",
134 pdev->num_resources);
Axel Line179840b2011-07-25 17:13:16 -0700135 err = -EINVAL;
David S. Miller58434922008-08-31 20:26:48 -0700136 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");
Axel Line179840b2011-07-25 17:13:16 -0700142 err = -ENOMEM;
David S. Miller58434922008-08-31 20:26:48 -0700143 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
Axel Line179840b2011-07-25 17:13:16 -0700165 return 0;
David S. Miller58434922008-08-31 20:26:48 -0700166
167out_unregister_led_cdevs:
168 for (i--; i >= 0; i--)
169 led_classdev_unregister(&p->leds[i].led_cdev);
Axel Line179840b2011-07-25 17:13:16 -0700170 kfree(p);
171out:
172 return err;
David S. Miller58434922008-08-31 20:26:48 -0700173}
174
175static 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
188static 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
204static int __devinit sunfire_clockboard_led_probe(struct platform_device *pdev)
205{
206 return sunfire_led_generic_probe(pdev, clockboard_led_types);
207}
208
209static 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
225static int __devinit sunfire_fhc_led_probe(struct platform_device *pdev)
226{
227 return sunfire_led_generic_probe(pdev, fhc_led_types);
228}
229
230MODULE_ALIAS("platform:sunfire-clockboard-leds");
231MODULE_ALIAS("platform:sunfire-fhc-leds");
232
233static 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
242static 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
251static 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
269static 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
275module_init(sunfire_leds_init);
276module_exit(sunfire_leds_exit);