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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
5843492c DM |
2 | /* leds-sunfire.c: SUNW,Ultra-Enterprise LED driver. |
3 | * | |
4 | * Copyright (C) 2008 David S. Miller <davem@davemloft.net> | |
5 | */ | |
6 | ||
4b07c5d5 JH |
7 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
8 | ||
5843492c DM |
9 | #include <linux/kernel.h> |
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/leds.h> | |
13 | #include <linux/io.h> | |
14 | #include <linux/platform_device.h> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
5843492c DM |
16 | |
17 | #include <asm/fhc.h> | |
18 | #include <asm/upa.h> | |
19 | ||
5843492c DM |
20 | MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); |
21 | MODULE_DESCRIPTION("Sun Fire LED driver"); | |
22 | MODULE_LICENSE("GPL"); | |
23 | ||
24 | struct 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 | ||
30 | static 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 | ||
54 | static 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 | ||
60 | static 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 | ||
66 | static 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 | ||
72 | static 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 | ||
96 | static 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 | ||
102 | static 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 | ||
108 | static 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 | ||
114 | typedef void (*set_handler)(struct led_classdev *, enum led_brightness); | |
115 | struct led_type { | |
116 | const char *name; | |
117 | set_handler handler; | |
118 | const char *default_trigger; | |
119 | }; | |
120 | ||
121 | #define NUM_LEDS_PER_BOARD 3 | |
122 | struct sunfire_drvdata { | |
123 | struct sunfire_led leds[NUM_LEDS_PER_BOARD]; | |
124 | }; | |
125 | ||
98ea1ea2 | 126 | static int sunfire_led_generic_probe(struct platform_device *pdev, |
5843492c DM |
127 | struct led_type *types) |
128 | { | |
129 | struct sunfire_drvdata *p; | |
e179840b | 130 | int i, err; |
5843492c DM |
131 | |
132 | if (pdev->num_resources != 1) { | |
4b07c5d5 | 133 | dev_err(&pdev->dev, "Wrong number of resources %d, should be 1\n", |
5843492c | 134 | pdev->num_resources); |
234699a8 | 135 | return -EINVAL; |
5843492c DM |
136 | } |
137 | ||
234699a8 | 138 | p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL); |
0c9a03b6 | 139 | if (!p) |
234699a8 | 140 | return -ENOMEM; |
5843492c DM |
141 | |
142 | for (i = 0; i < NUM_LEDS_PER_BOARD; i++) { | |
143 | struct led_classdev *lp = &p->leds[i].led_cdev; | |
144 | ||
145 | p->leds[i].reg = (void __iomem *) pdev->resource[0].start; | |
146 | lp->name = types[i].name; | |
147 | lp->brightness = LED_FULL; | |
148 | lp->brightness_set = types[i].handler; | |
149 | lp->default_trigger = types[i].default_trigger; | |
150 | ||
151 | err = led_classdev_register(&pdev->dev, lp); | |
152 | if (err) { | |
4b07c5d5 | 153 | dev_err(&pdev->dev, "Could not register %s LED\n", |
5843492c | 154 | lp->name); |
234699a8 BW |
155 | for (i--; i >= 0; i--) |
156 | led_classdev_unregister(&p->leds[i].led_cdev); | |
157 | return err; | |
5843492c DM |
158 | } |
159 | } | |
160 | ||
84196a2f | 161 | platform_set_drvdata(pdev, p); |
5843492c | 162 | |
e179840b | 163 | return 0; |
5843492c DM |
164 | } |
165 | ||
678e8a6b | 166 | static int sunfire_led_generic_remove(struct platform_device *pdev) |
5843492c | 167 | { |
84196a2f | 168 | struct sunfire_drvdata *p = platform_get_drvdata(pdev); |
5843492c DM |
169 | int i; |
170 | ||
171 | for (i = 0; i < NUM_LEDS_PER_BOARD; i++) | |
172 | led_classdev_unregister(&p->leds[i].led_cdev); | |
173 | ||
5843492c DM |
174 | return 0; |
175 | } | |
176 | ||
177 | static struct led_type clockboard_led_types[NUM_LEDS_PER_BOARD] = { | |
178 | { | |
179 | .name = "clockboard-left", | |
180 | .handler = clockboard_left_set, | |
181 | }, | |
182 | { | |
183 | .name = "clockboard-middle", | |
184 | .handler = clockboard_middle_set, | |
185 | }, | |
186 | { | |
187 | .name = "clockboard-right", | |
188 | .handler = clockboard_right_set, | |
4b07c5d5 | 189 | .default_trigger = "heartbeat", |
5843492c DM |
190 | }, |
191 | }; | |
192 | ||
98ea1ea2 | 193 | static int sunfire_clockboard_led_probe(struct platform_device *pdev) |
5843492c DM |
194 | { |
195 | return sunfire_led_generic_probe(pdev, clockboard_led_types); | |
196 | } | |
197 | ||
198 | static struct led_type fhc_led_types[NUM_LEDS_PER_BOARD] = { | |
199 | { | |
200 | .name = "fhc-left", | |
201 | .handler = fhc_left_set, | |
202 | }, | |
203 | { | |
204 | .name = "fhc-middle", | |
205 | .handler = fhc_middle_set, | |
206 | }, | |
207 | { | |
208 | .name = "fhc-right", | |
209 | .handler = fhc_right_set, | |
4b07c5d5 | 210 | .default_trigger = "heartbeat", |
5843492c DM |
211 | }, |
212 | }; | |
213 | ||
98ea1ea2 | 214 | static int sunfire_fhc_led_probe(struct platform_device *pdev) |
5843492c DM |
215 | { |
216 | return sunfire_led_generic_probe(pdev, fhc_led_types); | |
217 | } | |
218 | ||
219 | MODULE_ALIAS("platform:sunfire-clockboard-leds"); | |
220 | MODULE_ALIAS("platform:sunfire-fhc-leds"); | |
221 | ||
222 | static struct platform_driver sunfire_clockboard_led_driver = { | |
223 | .probe = sunfire_clockboard_led_probe, | |
df07cf81 | 224 | .remove = sunfire_led_generic_remove, |
5843492c DM |
225 | .driver = { |
226 | .name = "sunfire-clockboard-leds", | |
5843492c DM |
227 | }, |
228 | }; | |
229 | ||
230 | static struct platform_driver sunfire_fhc_led_driver = { | |
231 | .probe = sunfire_fhc_led_probe, | |
df07cf81 | 232 | .remove = sunfire_led_generic_remove, |
5843492c DM |
233 | .driver = { |
234 | .name = "sunfire-fhc-leds", | |
5843492c DM |
235 | }, |
236 | }; | |
237 | ||
6e25e641 TR |
238 | static struct platform_driver * const drivers[] = { |
239 | &sunfire_clockboard_led_driver, | |
240 | &sunfire_fhc_led_driver, | |
241 | }; | |
242 | ||
5843492c DM |
243 | static int __init sunfire_leds_init(void) |
244 | { | |
6e25e641 | 245 | return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); |
5843492c DM |
246 | } |
247 | ||
248 | static void __exit sunfire_leds_exit(void) | |
249 | { | |
6e25e641 | 250 | platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); |
5843492c DM |
251 | } |
252 | ||
253 | module_init(sunfire_leds_init); | |
254 | module_exit(sunfire_leds_exit); |