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6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/init.h>
11#include <linux/leds.h>
12#include <linux/io.h>
13#include <linux/platform_device.h>
14#include <linux/slab.h>
15
16#include <asm/fhc.h>
17#include <asm/upa.h>
18
19MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
20MODULE_DESCRIPTION("Sun Fire LED driver");
21MODULE_LICENSE("GPL");
22
23struct 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
29static 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
53static 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
59static 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
65static 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
71static 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
95static 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
101static 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
107static 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
113typedef void (*set_handler)(struct led_classdev *, enum led_brightness);
114struct led_type {
115 const char *name;
116 set_handler handler;
117 const char *default_trigger;
118};
119
120#define NUM_LEDS_PER_BOARD 3
121struct sunfire_drvdata {
122 struct sunfire_led leds[NUM_LEDS_PER_BOARD];
123};
124
125static int sunfire_led_generic_probe(struct platform_device *pdev,
126 struct led_type *types)
127{
128 struct sunfire_drvdata *p;
129 int i, err;
130
131 if (pdev->num_resources != 1) {
132 dev_err(&pdev->dev, "Wrong number of resources %d, should be 1\n",
133 pdev->num_resources);
134 return -EINVAL;
135 }
136
137 p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
138 if (!p) {
139 dev_err(&pdev->dev, "Could not allocate struct sunfire_drvdata\n");
140 return -ENOMEM;
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 dev_err(&pdev->dev, "Could not register %s LED\n",
155 lp->name);
156 for (i--; i >= 0; i--)
157 led_classdev_unregister(&p->leds[i].led_cdev);
158 return err;
159 }
160 }
161
162 platform_set_drvdata(pdev, p);
163
164 return 0;
165}
166
167static int sunfire_led_generic_remove(struct platform_device *pdev)
168{
169 struct sunfire_drvdata *p = platform_get_drvdata(pdev);
170 int i;
171
172 for (i = 0; i < NUM_LEDS_PER_BOARD; i++)
173 led_classdev_unregister(&p->leds[i].led_cdev);
174
175 return 0;
176}
177
178static struct led_type clockboard_led_types[NUM_LEDS_PER_BOARD] = {
179 {
180 .name = "clockboard-left",
181 .handler = clockboard_left_set,
182 },
183 {
184 .name = "clockboard-middle",
185 .handler = clockboard_middle_set,
186 },
187 {
188 .name = "clockboard-right",
189 .handler = clockboard_right_set,
190 .default_trigger = "heartbeat",
191 },
192};
193
194static int sunfire_clockboard_led_probe(struct platform_device *pdev)
195{
196 return sunfire_led_generic_probe(pdev, clockboard_led_types);
197}
198
199static struct led_type fhc_led_types[NUM_LEDS_PER_BOARD] = {
200 {
201 .name = "fhc-left",
202 .handler = fhc_left_set,
203 },
204 {
205 .name = "fhc-middle",
206 .handler = fhc_middle_set,
207 },
208 {
209 .name = "fhc-right",
210 .handler = fhc_right_set,
211 .default_trigger = "heartbeat",
212 },
213};
214
215static int sunfire_fhc_led_probe(struct platform_device *pdev)
216{
217 return sunfire_led_generic_probe(pdev, fhc_led_types);
218}
219
220MODULE_ALIAS("platform:sunfire-clockboard-leds");
221MODULE_ALIAS("platform:sunfire-fhc-leds");
222
223static struct platform_driver sunfire_clockboard_led_driver = {
224 .probe = sunfire_clockboard_led_probe,
225 .remove = sunfire_led_generic_remove,
226 .driver = {
227 .name = "sunfire-clockboard-leds",
228 .owner = THIS_MODULE,
229 },
230};
231
232static struct platform_driver sunfire_fhc_led_driver = {
233 .probe = sunfire_fhc_led_probe,
234 .remove = sunfire_led_generic_remove,
235 .driver = {
236 .name = "sunfire-fhc-leds",
237 .owner = THIS_MODULE,
238 },
239};
240
241static int __init sunfire_leds_init(void)
242{
243 int err = platform_driver_register(&sunfire_clockboard_led_driver);
244
245 if (err) {
246 pr_err("Could not register clock board LED driver\n");
247 return err;
248 }
249
250 err = platform_driver_register(&sunfire_fhc_led_driver);
251 if (err) {
252 pr_err("Could not register FHC LED driver\n");
253 platform_driver_unregister(&sunfire_clockboard_led_driver);
254 }
255
256 return err;
257}
258
259static void __exit sunfire_leds_exit(void)
260{
261 platform_driver_unregister(&sunfire_clockboard_led_driver);
262 platform_driver_unregister(&sunfire_fhc_led_driver);
263}
264
265module_init(sunfire_leds_init);
266module_exit(sunfire_leds_exit);
267
