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35#include <linux/acpi.h>
36#include <linux/device.h>
37#include <linux/dmi.h>
38#include <linux/hwmon.h>
39#include <linux/hwmon-sysfs.h>
40#include <linux/io.h>
41#include <linux/leds.h>
42#include <linux/module.h>
43#include <linux/mod_devicetable.h>
44#include <linux/platform_device.h>
45#include <linux/slab.h>
46
47#define MLXPLAT_CPLD_LPC_REG_BASE_ADRR 0x2500
48
49
50#define MLXCPLD_LED_OFFSET_HALF 0x01
51#define MLXCPLD_LED_OFFSET_FULL 0x02
52#define MLXCPLD_LED_IS_OFF 0x00
53#define MLXCPLD_LED_RED_STATIC_ON 0x05
54#define MLXCPLD_LED_RED_BLINK_HALF (MLXCPLD_LED_RED_STATIC_ON + \
55 MLXCPLD_LED_OFFSET_HALF)
56#define MLXCPLD_LED_RED_BLINK_FULL (MLXCPLD_LED_RED_STATIC_ON + \
57 MLXCPLD_LED_OFFSET_FULL)
58#define MLXCPLD_LED_GREEN_STATIC_ON 0x0D
59#define MLXCPLD_LED_GREEN_BLINK_HALF (MLXCPLD_LED_GREEN_STATIC_ON + \
60 MLXCPLD_LED_OFFSET_HALF)
61#define MLXCPLD_LED_GREEN_BLINK_FULL (MLXCPLD_LED_GREEN_STATIC_ON + \
62 MLXCPLD_LED_OFFSET_FULL)
63#define MLXCPLD_LED_BLINK_3HZ 167
64#define MLXCPLD_LED_BLINK_6HZ 83
65
66
67
68
69
70
71
72struct mlxcpld_param {
73 u8 offset;
74 u8 mask;
75 u8 base_color;
76};
77
78
79
80
81
82
83struct mlxcpld_led_priv {
84 struct led_classdev cdev;
85 struct mlxcpld_param param;
86};
87
88#define cdev_to_priv(c) container_of(c, struct mlxcpld_led_priv, cdev)
89
90
91
92
93
94
95
96
97
98struct mlxcpld_led_profile {
99 u8 offset;
100 u8 mask;
101 u8 base_color;
102 enum led_brightness brightness;
103 const char *name;
104};
105
106
107
108
109
110
111
112
113
114struct mlxcpld_led_pdata {
115 struct platform_device *pdev;
116 struct mlxcpld_led_priv *pled;
117 struct mlxcpld_led_profile *profile;
118 int num_led_instances;
119 spinlock_t lock;
120};
121
122static struct mlxcpld_led_pdata *mlxcpld_led;
123
124
125
126
127
128static struct mlxcpld_led_profile mlxcpld_led_default_profile[] = {
129 {
130 0x21, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
131 "mlxcpld:fan1:green",
132 },
133 {
134 0x21, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
135 "mlxcpld:fan1:red",
136 },
137 {
138 0x21, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
139 "mlxcpld:fan2:green",
140 },
141 {
142 0x21, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
143 "mlxcpld:fan2:red",
144 },
145 {
146 0x22, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
147 "mlxcpld:fan3:green",
148 },
149 {
150 0x22, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
151 "mlxcpld:fan3:red",
152 },
153 {
154 0x22, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
155 "mlxcpld:fan4:green",
156 },
157 {
158 0x22, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
159 "mlxcpld:fan4:red",
160 },
161 {
162 0x20, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
163 "mlxcpld:psu:green",
164 },
165 {
166 0x20, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
167 "mlxcpld:psu:red",
168 },
169 {
170 0x20, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
171 "mlxcpld:status:green",
172 },
173 {
174 0x20, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
175 "mlxcpld:status:red",
176 },
177};
178
179
180static struct mlxcpld_led_profile mlxcpld_led_msn2100_profile[] = {
181 {
182 0x21, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
183 "mlxcpld:fan:green",
184 },
185 {
186 0x21, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
187 "mlxcpld:fan:red",
188 },
189 {
190 0x23, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
191 "mlxcpld:psu1:green",
192 },
193 {
194 0x23, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
195 "mlxcpld:psu1:red",
196 },
197 {
198 0x23, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
199 "mlxcpld:psu2:green",
200 },
201 {
202 0x23, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
203 "mlxcpld:psu2:red",
204 },
205 {
206 0x20, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
207 "mlxcpld:status:green",
208 },
209 {
210 0x20, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
211 "mlxcpld:status:red",
212 },
213 {
214 0x24, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, LED_OFF,
215 "mlxcpld:uid:blue",
216 },
217};
218
219enum mlxcpld_led_platform_types {
220 MLXCPLD_LED_PLATFORM_DEFAULT,
221 MLXCPLD_LED_PLATFORM_MSN2100,
222};
223
224static const char *mlx_product_names[] = {
225 "DEFAULT",
226 "MSN2100",
227};
228
229static enum
230mlxcpld_led_platform_types mlxcpld_led_platform_check_sys_type(void)
231{
232 const char *mlx_product_name;
233 int i;
234
235 mlx_product_name = dmi_get_system_info(DMI_PRODUCT_NAME);
236 if (!mlx_product_name)
237 return MLXCPLD_LED_PLATFORM_DEFAULT;
238
239 for (i = 1; i < ARRAY_SIZE(mlx_product_names); i++) {
240 if (strstr(mlx_product_name, mlx_product_names[i]))
241 return i;
242 }
243
244 return MLXCPLD_LED_PLATFORM_DEFAULT;
245}
246
247static void mlxcpld_led_bus_access_func(u16 base, u8 offset, u8 rw_flag,
248 u8 *data)
249{
250 u32 addr = base + offset;
251
252 if (rw_flag == 0)
253 outb(*data, addr);
254 else
255 *data = inb(addr);
256}
257
258static void mlxcpld_led_store_hw(u8 mask, u8 off, u8 vset)
259{
260 u8 nib, val;
261
262
263
264
265
266
267
268
269
270
271
272 spin_lock(&mlxcpld_led->lock);
273 mlxcpld_led_bus_access_func(MLXPLAT_CPLD_LPC_REG_BASE_ADRR, off, 1,
274 &val);
275 nib = (mask == 0xf0) ? vset : (vset << 4);
276 val = (val & mask) | nib;
277 mlxcpld_led_bus_access_func(MLXPLAT_CPLD_LPC_REG_BASE_ADRR, off, 0,
278 &val);
279 spin_unlock(&mlxcpld_led->lock);
280}
281
282static void mlxcpld_led_brightness_set(struct led_classdev *led,
283 enum led_brightness value)
284{
285 struct mlxcpld_led_priv *pled = cdev_to_priv(led);
286
287 if (value) {
288 mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
289 pled->param.base_color);
290 return;
291 }
292
293 mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
294 MLXCPLD_LED_IS_OFF);
295}
296
297static int mlxcpld_led_blink_set(struct led_classdev *led,
298 unsigned long *delay_on,
299 unsigned long *delay_off)
300{
301 struct mlxcpld_led_priv *pled = cdev_to_priv(led);
302
303
304
305
306
307 if (!(*delay_on == 0 && *delay_off == 0) &&
308 !(*delay_on == MLXCPLD_LED_BLINK_3HZ &&
309 *delay_off == MLXCPLD_LED_BLINK_3HZ) &&
310 !(*delay_on == MLXCPLD_LED_BLINK_6HZ &&
311 *delay_off == MLXCPLD_LED_BLINK_6HZ))
312 return -EINVAL;
313
314 if (*delay_on == MLXCPLD_LED_BLINK_6HZ)
315 mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
316 pled->param.base_color +
317 MLXCPLD_LED_OFFSET_FULL);
318 else
319 mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
320 pled->param.base_color +
321 MLXCPLD_LED_OFFSET_HALF);
322
323 return 0;
324}
325
326static int mlxcpld_led_config(struct device *dev,
327 struct mlxcpld_led_pdata *cpld)
328{
329 int i;
330 int err;
331
332 cpld->pled = devm_kcalloc(dev,
333 cpld->num_led_instances,
334 sizeof(struct mlxcpld_led_priv),
335 GFP_KERNEL);
336 if (!cpld->pled)
337 return -ENOMEM;
338
339 for (i = 0; i < cpld->num_led_instances; i++) {
340 cpld->pled[i].cdev.name = cpld->profile[i].name;
341 cpld->pled[i].cdev.brightness = cpld->profile[i].brightness;
342 cpld->pled[i].cdev.max_brightness = 1;
343 cpld->pled[i].cdev.brightness_set = mlxcpld_led_brightness_set;
344 cpld->pled[i].cdev.blink_set = mlxcpld_led_blink_set;
345 cpld->pled[i].cdev.flags = LED_CORE_SUSPENDRESUME;
346 err = devm_led_classdev_register(dev, &cpld->pled[i].cdev);
347 if (err)
348 return err;
349
350 cpld->pled[i].param.offset = mlxcpld_led->profile[i].offset;
351 cpld->pled[i].param.mask = mlxcpld_led->profile[i].mask;
352 cpld->pled[i].param.base_color =
353 mlxcpld_led->profile[i].base_color;
354
355 if (mlxcpld_led->profile[i].brightness)
356 mlxcpld_led_brightness_set(&cpld->pled[i].cdev,
357 mlxcpld_led->profile[i].brightness);
358 }
359
360 return 0;
361}
362
363static int __init mlxcpld_led_probe(struct platform_device *pdev)
364{
365 enum mlxcpld_led_platform_types mlxcpld_led_plat =
366 mlxcpld_led_platform_check_sys_type();
367
368 mlxcpld_led = devm_kzalloc(&pdev->dev, sizeof(*mlxcpld_led),
369 GFP_KERNEL);
370 if (!mlxcpld_led)
371 return -ENOMEM;
372
373 mlxcpld_led->pdev = pdev;
374
375 switch (mlxcpld_led_plat) {
376 case MLXCPLD_LED_PLATFORM_MSN2100:
377 mlxcpld_led->profile = mlxcpld_led_msn2100_profile;
378 mlxcpld_led->num_led_instances =
379 ARRAY_SIZE(mlxcpld_led_msn2100_profile);
380 break;
381
382 default:
383 mlxcpld_led->profile = mlxcpld_led_default_profile;
384 mlxcpld_led->num_led_instances =
385 ARRAY_SIZE(mlxcpld_led_default_profile);
386 break;
387 }
388
389 spin_lock_init(&mlxcpld_led->lock);
390
391 return mlxcpld_led_config(&pdev->dev, mlxcpld_led);
392}
393
394static struct platform_driver mlxcpld_led_driver = {
395 .driver = {
396 .name = KBUILD_MODNAME,
397 },
398};
399
400static int __init mlxcpld_led_init(void)
401{
402 struct platform_device *pdev;
403 int err;
404
405 if (!dmi_match(DMI_CHASSIS_VENDOR, "Mellanox Technologies Ltd."))
406 return -ENODEV;
407
408 pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
409 if (IS_ERR(pdev)) {
410 pr_err("Device allocation failed\n");
411 return PTR_ERR(pdev);
412 }
413
414 err = platform_driver_probe(&mlxcpld_led_driver, mlxcpld_led_probe);
415 if (err) {
416 pr_err("Probe platform driver failed\n");
417 platform_device_unregister(pdev);
418 }
419
420 return err;
421}
422
423static void __exit mlxcpld_led_exit(void)
424{
425 platform_device_unregister(mlxcpld_led->pdev);
426 platform_driver_unregister(&mlxcpld_led_driver);
427}
428
429module_init(mlxcpld_led_init);
430module_exit(mlxcpld_led_exit);
431
432MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
433MODULE_DESCRIPTION("Mellanox board LED driver");
434MODULE_LICENSE("Dual BSD/GPL");
435MODULE_ALIAS("platform:leds_mlxcpld");
436
