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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
Jingoo Han4b07c5d2013-02-04 18:01:21 -08006#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
David S. Miller58434922008-08-31 20:26:48 -07008#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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
David S. Miller58434922008-08-31 20:26:48 -070015
16#include <asm/fhc.h>
17#include <asm/upa.h>
18
David S. Miller58434922008-08-31 20:26:48 -070019MODULE_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
Bill Pemberton98ea1ea2012-11-19 13:23:02 -0500125static int sunfire_led_generic_probe(struct platform_device *pdev,
David S. Miller58434922008-08-31 20:26:48 -0700126 struct led_type *types)
127{
128 struct sunfire_drvdata *p;
Axel Line179840b2011-07-25 17:13:16 -0700129 int i, err;
David S. Miller58434922008-08-31 20:26:48 -0700130
131 if (pdev->num_resources != 1) {
Jingoo Han4b07c5d2013-02-04 18:01:21 -0800132 dev_err(&pdev->dev, "Wrong number of resources %d, should be 1\n",
David S. Miller58434922008-08-31 20:26:48 -0700133 pdev->num_resources);
Bryan Wu234699a2012-07-04 12:04:48 +0800134 return -EINVAL;
David S. Miller58434922008-08-31 20:26:48 -0700135 }
136
Bryan Wu234699a2012-07-04 12:04:48 +0800137 p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
Xiubo Li0c9a03b2014-05-07 20:25:52 -0700138 if (!p)
Bryan Wu234699a2012-07-04 12:04:48 +0800139 return -ENOMEM;
David S. Miller58434922008-08-31 20:26:48 -0700140
141 for (i = 0; i < NUM_LEDS_PER_BOARD; i++) {
142 struct led_classdev *lp = &p->leds[i].led_cdev;
143
144 p->leds[i].reg = (void __iomem *) pdev->resource[0].start;
145 lp->name = types[i].name;
146 lp->brightness = LED_FULL;
147 lp->brightness_set = types[i].handler;
148 lp->default_trigger = types[i].default_trigger;
149
150 err = led_classdev_register(&pdev->dev, lp);
151 if (err) {
Jingoo Han4b07c5d2013-02-04 18:01:21 -0800152 dev_err(&pdev->dev, "Could not register %s LED\n",
David S. Miller58434922008-08-31 20:26:48 -0700153 lp->name);
Bryan Wu234699a2012-07-04 12:04:48 +0800154 for (i--; i >= 0; i--)
155 led_classdev_unregister(&p->leds[i].led_cdev);
156 return err;
David S. Miller58434922008-08-31 20:26:48 -0700157 }
158 }
159
Jingoo Han84196a22013-05-23 03:28:33 -0700160 platform_set_drvdata(pdev, p);
David S. Miller58434922008-08-31 20:26:48 -0700161
Axel Line179840b2011-07-25 17:13:16 -0700162 return 0;
David S. Miller58434922008-08-31 20:26:48 -0700163}
164
Bill Pemberton678e8a62012-11-19 13:26:00 -0500165static int sunfire_led_generic_remove(struct platform_device *pdev)
David S. Miller58434922008-08-31 20:26:48 -0700166{
Jingoo Han84196a22013-05-23 03:28:33 -0700167 struct sunfire_drvdata *p = platform_get_drvdata(pdev);
David S. Miller58434922008-08-31 20:26:48 -0700168 int i;
169
170 for (i = 0; i < NUM_LEDS_PER_BOARD; i++)
171 led_classdev_unregister(&p->leds[i].led_cdev);
172
David S. Miller58434922008-08-31 20:26:48 -0700173 return 0;
174}
175
176static struct led_type clockboard_led_types[NUM_LEDS_PER_BOARD] = {
177 {
178 .name = "clockboard-left",
179 .handler = clockboard_left_set,
180 },
181 {
182 .name = "clockboard-middle",
183 .handler = clockboard_middle_set,
184 },
185 {
186 .name = "clockboard-right",
187 .handler = clockboard_right_set,
Jingoo Han4b07c5d2013-02-04 18:01:21 -0800188 .default_trigger = "heartbeat",
David S. Miller58434922008-08-31 20:26:48 -0700189 },
190};
191
Bill Pemberton98ea1ea2012-11-19 13:23:02 -0500192static int sunfire_clockboard_led_probe(struct platform_device *pdev)
David S. Miller58434922008-08-31 20:26:48 -0700193{
194 return sunfire_led_generic_probe(pdev, clockboard_led_types);
195}
196
197static struct led_type fhc_led_types[NUM_LEDS_PER_BOARD] = {
198 {
199 .name = "fhc-left",
200 .handler = fhc_left_set,
201 },
202 {
203 .name = "fhc-middle",
204 .handler = fhc_middle_set,
205 },
206 {
207 .name = "fhc-right",
208 .handler = fhc_right_set,
Jingoo Han4b07c5d2013-02-04 18:01:21 -0800209 .default_trigger = "heartbeat",
David S. Miller58434922008-08-31 20:26:48 -0700210 },
211};
212
Bill Pemberton98ea1ea2012-11-19 13:23:02 -0500213static int sunfire_fhc_led_probe(struct platform_device *pdev)
David S. Miller58434922008-08-31 20:26:48 -0700214{
215 return sunfire_led_generic_probe(pdev, fhc_led_types);
216}
217
218MODULE_ALIAS("platform:sunfire-clockboard-leds");
219MODULE_ALIAS("platform:sunfire-fhc-leds");
220
221static struct platform_driver sunfire_clockboard_led_driver = {
222 .probe = sunfire_clockboard_led_probe,
Bill Pembertondf07cf82012-11-19 13:20:20 -0500223 .remove = sunfire_led_generic_remove,
David S. Miller58434922008-08-31 20:26:48 -0700224 .driver = {
225 .name = "sunfire-clockboard-leds",
David S. Miller58434922008-08-31 20:26:48 -0700226 },
227};
228
229static struct platform_driver sunfire_fhc_led_driver = {
230 .probe = sunfire_fhc_led_probe,
Bill Pembertondf07cf82012-11-19 13:20:20 -0500231 .remove = sunfire_led_generic_remove,
David S. Miller58434922008-08-31 20:26:48 -0700232 .driver = {
233 .name = "sunfire-fhc-leds",
David S. Miller58434922008-08-31 20:26:48 -0700234 },
235};
236
237static int __init sunfire_leds_init(void)
238{
239 int err = platform_driver_register(&sunfire_clockboard_led_driver);
240
241 if (err) {
Jingoo Han4b07c5d2013-02-04 18:01:21 -0800242 pr_err("Could not register clock board LED driver\n");
David S. Miller58434922008-08-31 20:26:48 -0700243 return err;
244 }
245
246 err = platform_driver_register(&sunfire_fhc_led_driver);
247 if (err) {
Jingoo Han4b07c5d2013-02-04 18:01:21 -0800248 pr_err("Could not register FHC LED driver\n");
David S. Miller58434922008-08-31 20:26:48 -0700249 platform_driver_unregister(&sunfire_clockboard_led_driver);
250 }
251
252 return err;
253}
254
255static void __exit sunfire_leds_exit(void)
256{
257 platform_driver_unregister(&sunfire_clockboard_led_driver);
258 platform_driver_unregister(&sunfire_fhc_led_driver);
259}
260
261module_init(sunfire_leds_init);
262module_exit(sunfire_leds_exit);