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ba224e2c JD |
1 | /* |
2 | * pc87427.c - hardware monitoring driver for the | |
3 | * National Semiconductor PC87427 Super-I/O chip | |
4 | * Copyright (C) 2006 Jean Delvare <khali@linux-fr.org> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * Supports the following chips: | |
16 | * | |
17 | * Chip #vin #fan #pwm #temp devid | |
18 | * PC87427 - 8 - - 0xF2 | |
19 | * | |
20 | * This driver assumes that no more than one chip is present. | |
21 | * Only fan inputs are supported so far, although the chip can do much more. | |
22 | */ | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/jiffies.h> | |
28 | #include <linux/platform_device.h> | |
29 | #include <linux/hwmon.h> | |
30 | #include <linux/hwmon-sysfs.h> | |
31 | #include <linux/err.h> | |
32 | #include <linux/mutex.h> | |
33 | #include <linux/sysfs.h> | |
ce7ee4e8 | 34 | #include <linux/ioport.h> |
ba224e2c JD |
35 | #include <asm/io.h> |
36 | ||
37 | static struct platform_device *pdev; | |
38 | ||
39 | #define DRVNAME "pc87427" | |
40 | ||
41 | /* The lock mutex protects both the I/O accesses (needed because the | |
42 | device is using banked registers) and the register cache (needed to keep | |
43 | the data in the registers and the cache in sync at any time). */ | |
44 | struct pc87427_data { | |
1beeffe4 | 45 | struct device *hwmon_dev; |
ba224e2c JD |
46 | struct mutex lock; |
47 | int address[2]; | |
48 | const char *name; | |
49 | ||
50 | unsigned long last_updated; /* in jiffies */ | |
51 | u8 fan_enabled; /* bit vector */ | |
52 | u16 fan[8]; /* register values */ | |
53 | u16 fan_min[8]; /* register values */ | |
54 | u8 fan_status[8]; /* register values */ | |
55 | }; | |
56 | ||
57 | /* | |
58 | * Super-I/O registers and operations | |
59 | */ | |
60 | ||
61 | #define SIOREG_LDSEL 0x07 /* Logical device select */ | |
62 | #define SIOREG_DEVID 0x20 /* Device ID */ | |
63 | #define SIOREG_ACT 0x30 /* Device activation */ | |
64 | #define SIOREG_MAP 0x50 /* I/O or memory mapping */ | |
65 | #define SIOREG_IOBASE 0x60 /* I/O base address */ | |
66 | ||
67 | static const u8 logdev[2] = { 0x09, 0x14 }; | |
68 | static const char *logdev_str[2] = { DRVNAME " FMC", DRVNAME " HMC" }; | |
69 | #define LD_FAN 0 | |
70 | #define LD_IN 1 | |
71 | #define LD_TEMP 1 | |
72 | ||
73 | static inline void superio_outb(int sioaddr, int reg, int val) | |
74 | { | |
75 | outb(reg, sioaddr); | |
76 | outb(val, sioaddr + 1); | |
77 | } | |
78 | ||
79 | static inline int superio_inb(int sioaddr, int reg) | |
80 | { | |
81 | outb(reg, sioaddr); | |
82 | return inb(sioaddr + 1); | |
83 | } | |
84 | ||
85 | static inline void superio_exit(int sioaddr) | |
86 | { | |
87 | outb(0x02, sioaddr); | |
88 | outb(0x02, sioaddr + 1); | |
89 | } | |
90 | ||
91 | /* | |
92 | * Logical devices | |
93 | */ | |
94 | ||
95 | #define REGION_LENGTH 32 | |
96 | #define PC87427_REG_BANK 0x0f | |
97 | #define BANK_FM(nr) (nr) | |
98 | #define BANK_FT(nr) (0x08 + (nr)) | |
99 | #define BANK_FC(nr) (0x10 + (nr) * 2) | |
100 | ||
101 | /* | |
102 | * I/O access functions | |
103 | */ | |
104 | ||
105 | /* ldi is the logical device index */ | |
106 | static inline int pc87427_read8(struct pc87427_data *data, u8 ldi, u8 reg) | |
107 | { | |
108 | return inb(data->address[ldi] + reg); | |
109 | } | |
110 | ||
111 | /* Must be called with data->lock held, except during init */ | |
112 | static inline int pc87427_read8_bank(struct pc87427_data *data, u8 ldi, | |
113 | u8 bank, u8 reg) | |
114 | { | |
115 | outb(bank, data->address[ldi] + PC87427_REG_BANK); | |
116 | return inb(data->address[ldi] + reg); | |
117 | } | |
118 | ||
119 | /* Must be called with data->lock held, except during init */ | |
120 | static inline void pc87427_write8_bank(struct pc87427_data *data, u8 ldi, | |
121 | u8 bank, u8 reg, u8 value) | |
122 | { | |
123 | outb(bank, data->address[ldi] + PC87427_REG_BANK); | |
124 | outb(value, data->address[ldi] + reg); | |
125 | } | |
126 | ||
127 | /* | |
128 | * Fan registers and conversions | |
129 | */ | |
130 | ||
131 | /* fan data registers are 16-bit wide */ | |
132 | #define PC87427_REG_FAN 0x12 | |
133 | #define PC87427_REG_FAN_MIN 0x14 | |
134 | #define PC87427_REG_FAN_STATUS 0x10 | |
135 | ||
136 | #define FAN_STATUS_STALL (1 << 3) | |
137 | #define FAN_STATUS_LOSPD (1 << 1) | |
138 | #define FAN_STATUS_MONEN (1 << 0) | |
139 | ||
140 | /* Dedicated function to read all registers related to a given fan input. | |
141 | This saves us quite a few locks and bank selections. | |
142 | Must be called with data->lock held. | |
143 | nr is from 0 to 7 */ | |
144 | static void pc87427_readall_fan(struct pc87427_data *data, u8 nr) | |
145 | { | |
146 | int iobase = data->address[LD_FAN]; | |
147 | ||
148 | outb(BANK_FM(nr), iobase + PC87427_REG_BANK); | |
149 | data->fan[nr] = inw(iobase + PC87427_REG_FAN); | |
150 | data->fan_min[nr] = inw(iobase + PC87427_REG_FAN_MIN); | |
151 | data->fan_status[nr] = inb(iobase + PC87427_REG_FAN_STATUS); | |
152 | /* Clear fan alarm bits */ | |
153 | outb(data->fan_status[nr], iobase + PC87427_REG_FAN_STATUS); | |
154 | } | |
155 | ||
156 | /* The 2 LSB of fan speed registers are used for something different. | |
157 | The actual 2 LSB of the measurements are not available. */ | |
158 | static inline unsigned long fan_from_reg(u16 reg) | |
159 | { | |
160 | reg &= 0xfffc; | |
161 | if (reg == 0x0000 || reg == 0xfffc) | |
162 | return 0; | |
163 | return 5400000UL / reg; | |
164 | } | |
165 | ||
166 | /* The 2 LSB of the fan speed limit registers are not significant. */ | |
167 | static inline u16 fan_to_reg(unsigned long val) | |
168 | { | |
169 | if (val < 83UL) | |
170 | return 0xffff; | |
171 | if (val >= 1350000UL) | |
172 | return 0x0004; | |
173 | return ((1350000UL + val / 2) / val) << 2; | |
174 | } | |
175 | ||
176 | /* | |
177 | * Data interface | |
178 | */ | |
179 | ||
180 | static struct pc87427_data *pc87427_update_device(struct device *dev) | |
181 | { | |
182 | struct pc87427_data *data = dev_get_drvdata(dev); | |
183 | int i; | |
184 | ||
185 | mutex_lock(&data->lock); | |
186 | if (!time_after(jiffies, data->last_updated + HZ) | |
187 | && data->last_updated) | |
188 | goto done; | |
189 | ||
190 | /* Fans */ | |
191 | for (i = 0; i < 8; i++) { | |
192 | if (!(data->fan_enabled & (1 << i))) | |
193 | continue; | |
194 | pc87427_readall_fan(data, i); | |
195 | } | |
196 | data->last_updated = jiffies; | |
197 | ||
198 | done: | |
199 | mutex_unlock(&data->lock); | |
200 | return data; | |
201 | } | |
202 | ||
203 | static ssize_t show_fan_input(struct device *dev, struct device_attribute | |
204 | *devattr, char *buf) | |
205 | { | |
206 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
207 | struct pc87427_data *data = pc87427_update_device(dev); | |
208 | int nr = attr->index; | |
209 | ||
210 | return sprintf(buf, "%lu\n", fan_from_reg(data->fan[nr])); | |
211 | } | |
212 | ||
213 | static ssize_t show_fan_min(struct device *dev, struct device_attribute | |
214 | *devattr, char *buf) | |
215 | { | |
216 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
217 | struct pc87427_data *data = pc87427_update_device(dev); | |
218 | int nr = attr->index; | |
219 | ||
220 | return sprintf(buf, "%lu\n", fan_from_reg(data->fan_min[nr])); | |
221 | } | |
222 | ||
223 | static ssize_t show_fan_alarm(struct device *dev, struct device_attribute | |
224 | *devattr, char *buf) | |
225 | { | |
226 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
227 | struct pc87427_data *data = pc87427_update_device(dev); | |
228 | int nr = attr->index; | |
229 | ||
230 | return sprintf(buf, "%d\n", !!(data->fan_status[nr] | |
231 | & FAN_STATUS_LOSPD)); | |
232 | } | |
233 | ||
234 | static ssize_t show_fan_fault(struct device *dev, struct device_attribute | |
235 | *devattr, char *buf) | |
236 | { | |
237 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
238 | struct pc87427_data *data = pc87427_update_device(dev); | |
239 | int nr = attr->index; | |
240 | ||
241 | return sprintf(buf, "%d\n", !!(data->fan_status[nr] | |
242 | & FAN_STATUS_STALL)); | |
243 | } | |
244 | ||
245 | static ssize_t set_fan_min(struct device *dev, struct device_attribute | |
246 | *devattr, const char *buf, size_t count) | |
247 | { | |
248 | struct pc87427_data *data = dev_get_drvdata(dev); | |
249 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
250 | int nr = attr->index; | |
251 | unsigned long val = simple_strtoul(buf, NULL, 10); | |
252 | int iobase = data->address[LD_FAN]; | |
253 | ||
254 | mutex_lock(&data->lock); | |
255 | outb(BANK_FM(nr), iobase + PC87427_REG_BANK); | |
256 | /* The low speed limit registers are read-only while monitoring | |
257 | is enabled, so we have to disable monitoring, then change the | |
258 | limit, and finally enable monitoring again. */ | |
259 | outb(0, iobase + PC87427_REG_FAN_STATUS); | |
260 | data->fan_min[nr] = fan_to_reg(val); | |
261 | outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN); | |
262 | outb(FAN_STATUS_MONEN, iobase + PC87427_REG_FAN_STATUS); | |
263 | mutex_unlock(&data->lock); | |
264 | ||
265 | return count; | |
266 | } | |
267 | ||
268 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0); | |
269 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1); | |
270 | static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan_input, NULL, 2); | |
271 | static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan_input, NULL, 3); | |
272 | static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan_input, NULL, 4); | |
273 | static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan_input, NULL, 5); | |
274 | static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan_input, NULL, 6); | |
275 | static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan_input, NULL, 7); | |
276 | ||
277 | static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, | |
278 | show_fan_min, set_fan_min, 0); | |
279 | static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, | |
280 | show_fan_min, set_fan_min, 1); | |
281 | static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, | |
282 | show_fan_min, set_fan_min, 2); | |
283 | static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, | |
284 | show_fan_min, set_fan_min, 3); | |
285 | static SENSOR_DEVICE_ATTR(fan5_min, S_IWUSR | S_IRUGO, | |
286 | show_fan_min, set_fan_min, 4); | |
287 | static SENSOR_DEVICE_ATTR(fan6_min, S_IWUSR | S_IRUGO, | |
288 | show_fan_min, set_fan_min, 5); | |
289 | static SENSOR_DEVICE_ATTR(fan7_min, S_IWUSR | S_IRUGO, | |
290 | show_fan_min, set_fan_min, 6); | |
291 | static SENSOR_DEVICE_ATTR(fan8_min, S_IWUSR | S_IRUGO, | |
292 | show_fan_min, set_fan_min, 7); | |
293 | ||
294 | static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_fan_alarm, NULL, 0); | |
295 | static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_fan_alarm, NULL, 1); | |
296 | static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_fan_alarm, NULL, 2); | |
297 | static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_fan_alarm, NULL, 3); | |
298 | static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_fan_alarm, NULL, 4); | |
299 | static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_fan_alarm, NULL, 5); | |
300 | static SENSOR_DEVICE_ATTR(fan7_alarm, S_IRUGO, show_fan_alarm, NULL, 6); | |
301 | static SENSOR_DEVICE_ATTR(fan8_alarm, S_IRUGO, show_fan_alarm, NULL, 7); | |
302 | ||
303 | static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0); | |
304 | static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1); | |
305 | static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2); | |
306 | static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3); | |
307 | static SENSOR_DEVICE_ATTR(fan5_fault, S_IRUGO, show_fan_fault, NULL, 4); | |
308 | static SENSOR_DEVICE_ATTR(fan6_fault, S_IRUGO, show_fan_fault, NULL, 5); | |
309 | static SENSOR_DEVICE_ATTR(fan7_fault, S_IRUGO, show_fan_fault, NULL, 6); | |
310 | static SENSOR_DEVICE_ATTR(fan8_fault, S_IRUGO, show_fan_fault, NULL, 7); | |
311 | ||
312 | static struct attribute *pc87427_attributes_fan[8][5] = { | |
313 | { | |
314 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
315 | &sensor_dev_attr_fan1_min.dev_attr.attr, | |
316 | &sensor_dev_attr_fan1_alarm.dev_attr.attr, | |
317 | &sensor_dev_attr_fan1_fault.dev_attr.attr, | |
318 | NULL | |
319 | }, { | |
320 | &sensor_dev_attr_fan2_input.dev_attr.attr, | |
321 | &sensor_dev_attr_fan2_min.dev_attr.attr, | |
322 | &sensor_dev_attr_fan2_alarm.dev_attr.attr, | |
323 | &sensor_dev_attr_fan2_fault.dev_attr.attr, | |
324 | NULL | |
325 | }, { | |
326 | &sensor_dev_attr_fan3_input.dev_attr.attr, | |
327 | &sensor_dev_attr_fan3_min.dev_attr.attr, | |
328 | &sensor_dev_attr_fan3_alarm.dev_attr.attr, | |
329 | &sensor_dev_attr_fan3_fault.dev_attr.attr, | |
330 | NULL | |
331 | }, { | |
332 | &sensor_dev_attr_fan4_input.dev_attr.attr, | |
333 | &sensor_dev_attr_fan4_min.dev_attr.attr, | |
334 | &sensor_dev_attr_fan4_alarm.dev_attr.attr, | |
335 | &sensor_dev_attr_fan4_fault.dev_attr.attr, | |
336 | NULL | |
337 | }, { | |
338 | &sensor_dev_attr_fan5_input.dev_attr.attr, | |
339 | &sensor_dev_attr_fan5_min.dev_attr.attr, | |
340 | &sensor_dev_attr_fan5_alarm.dev_attr.attr, | |
341 | &sensor_dev_attr_fan5_fault.dev_attr.attr, | |
342 | NULL | |
343 | }, { | |
344 | &sensor_dev_attr_fan6_input.dev_attr.attr, | |
345 | &sensor_dev_attr_fan6_min.dev_attr.attr, | |
346 | &sensor_dev_attr_fan6_alarm.dev_attr.attr, | |
347 | &sensor_dev_attr_fan6_fault.dev_attr.attr, | |
348 | NULL | |
349 | }, { | |
350 | &sensor_dev_attr_fan7_input.dev_attr.attr, | |
351 | &sensor_dev_attr_fan7_min.dev_attr.attr, | |
352 | &sensor_dev_attr_fan7_alarm.dev_attr.attr, | |
353 | &sensor_dev_attr_fan7_fault.dev_attr.attr, | |
354 | NULL | |
355 | }, { | |
356 | &sensor_dev_attr_fan8_input.dev_attr.attr, | |
357 | &sensor_dev_attr_fan8_min.dev_attr.attr, | |
358 | &sensor_dev_attr_fan8_alarm.dev_attr.attr, | |
359 | &sensor_dev_attr_fan8_fault.dev_attr.attr, | |
360 | NULL | |
361 | } | |
362 | }; | |
363 | ||
364 | static const struct attribute_group pc87427_group_fan[8] = { | |
365 | { .attrs = pc87427_attributes_fan[0] }, | |
366 | { .attrs = pc87427_attributes_fan[1] }, | |
367 | { .attrs = pc87427_attributes_fan[2] }, | |
368 | { .attrs = pc87427_attributes_fan[3] }, | |
369 | { .attrs = pc87427_attributes_fan[4] }, | |
370 | { .attrs = pc87427_attributes_fan[5] }, | |
371 | { .attrs = pc87427_attributes_fan[6] }, | |
372 | { .attrs = pc87427_attributes_fan[7] }, | |
373 | }; | |
374 | ||
375 | static ssize_t show_name(struct device *dev, struct device_attribute | |
376 | *devattr, char *buf) | |
377 | { | |
378 | struct pc87427_data *data = dev_get_drvdata(dev); | |
379 | ||
380 | return sprintf(buf, "%s\n", data->name); | |
381 | } | |
382 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
383 | ||
384 | ||
385 | /* | |
386 | * Device detection, attach and detach | |
387 | */ | |
388 | ||
389 | static void __devinit pc87427_init_device(struct device *dev) | |
390 | { | |
391 | struct pc87427_data *data = dev_get_drvdata(dev); | |
392 | int i; | |
393 | u8 reg; | |
394 | ||
395 | /* The FMC module should be ready */ | |
396 | reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK); | |
397 | if (!(reg & 0x80)) | |
398 | dev_warn(dev, "FMC module not ready!\n"); | |
399 | ||
400 | /* Check which fans are enabled */ | |
401 | for (i = 0; i < 8; i++) { | |
402 | reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i), | |
403 | PC87427_REG_FAN_STATUS); | |
404 | if (reg & FAN_STATUS_MONEN) | |
405 | data->fan_enabled |= (1 << i); | |
406 | } | |
407 | ||
408 | if (!data->fan_enabled) { | |
409 | dev_dbg(dev, "Enabling all fan inputs\n"); | |
410 | for (i = 0; i < 8; i++) | |
411 | pc87427_write8_bank(data, LD_FAN, BANK_FM(i), | |
412 | PC87427_REG_FAN_STATUS, | |
413 | FAN_STATUS_MONEN); | |
414 | data->fan_enabled = 0xff; | |
415 | } | |
416 | } | |
417 | ||
418 | static int __devinit pc87427_probe(struct platform_device *pdev) | |
419 | { | |
420 | struct pc87427_data *data; | |
421 | struct resource *res; | |
422 | int i, err; | |
423 | ||
424 | if (!(data = kzalloc(sizeof(struct pc87427_data), GFP_KERNEL))) { | |
425 | err = -ENOMEM; | |
426 | printk(KERN_ERR DRVNAME ": Out of memory\n"); | |
427 | goto exit; | |
428 | } | |
429 | ||
430 | /* This will need to be revisited when we add support for | |
431 | temperature and voltage monitoring. */ | |
432 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
ce7ee4e8 JD |
433 | if (!request_region(res->start, res->end - res->start + 1, DRVNAME)) { |
434 | err = -EBUSY; | |
435 | dev_err(&pdev->dev, "Failed to request region 0x%lx-0x%lx\n", | |
436 | (unsigned long)res->start, (unsigned long)res->end); | |
437 | goto exit_kfree; | |
438 | } | |
ba224e2c JD |
439 | data->address[0] = res->start; |
440 | ||
441 | mutex_init(&data->lock); | |
442 | data->name = "pc87427"; | |
443 | platform_set_drvdata(pdev, data); | |
444 | pc87427_init_device(&pdev->dev); | |
445 | ||
446 | /* Register sysfs hooks */ | |
447 | if ((err = device_create_file(&pdev->dev, &dev_attr_name))) | |
ce7ee4e8 | 448 | goto exit_release_region; |
ba224e2c JD |
449 | for (i = 0; i < 8; i++) { |
450 | if (!(data->fan_enabled & (1 << i))) | |
451 | continue; | |
452 | if ((err = sysfs_create_group(&pdev->dev.kobj, | |
453 | &pc87427_group_fan[i]))) | |
454 | goto exit_remove_files; | |
455 | } | |
456 | ||
1beeffe4 TJ |
457 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
458 | if (IS_ERR(data->hwmon_dev)) { | |
459 | err = PTR_ERR(data->hwmon_dev); | |
ba224e2c JD |
460 | dev_err(&pdev->dev, "Class registration failed (%d)\n", err); |
461 | goto exit_remove_files; | |
462 | } | |
463 | ||
464 | return 0; | |
465 | ||
466 | exit_remove_files: | |
467 | for (i = 0; i < 8; i++) { | |
468 | if (!(data->fan_enabled & (1 << i))) | |
469 | continue; | |
470 | sysfs_remove_group(&pdev->dev.kobj, &pc87427_group_fan[i]); | |
471 | } | |
ce7ee4e8 JD |
472 | exit_release_region: |
473 | release_region(res->start, res->end - res->start + 1); | |
ba224e2c JD |
474 | exit_kfree: |
475 | platform_set_drvdata(pdev, NULL); | |
476 | kfree(data); | |
477 | exit: | |
478 | return err; | |
479 | } | |
480 | ||
481 | static int __devexit pc87427_remove(struct platform_device *pdev) | |
482 | { | |
483 | struct pc87427_data *data = platform_get_drvdata(pdev); | |
ce7ee4e8 | 484 | struct resource *res; |
ba224e2c JD |
485 | int i; |
486 | ||
1beeffe4 | 487 | hwmon_device_unregister(data->hwmon_dev); |
ba224e2c JD |
488 | device_remove_file(&pdev->dev, &dev_attr_name); |
489 | for (i = 0; i < 8; i++) { | |
490 | if (!(data->fan_enabled & (1 << i))) | |
491 | continue; | |
492 | sysfs_remove_group(&pdev->dev.kobj, &pc87427_group_fan[i]); | |
493 | } | |
04a6217d | 494 | platform_set_drvdata(pdev, NULL); |
ba224e2c JD |
495 | kfree(data); |
496 | ||
ce7ee4e8 JD |
497 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
498 | release_region(res->start, res->end - res->start + 1); | |
499 | ||
ba224e2c JD |
500 | return 0; |
501 | } | |
502 | ||
503 | ||
504 | static struct platform_driver pc87427_driver = { | |
505 | .driver = { | |
506 | .owner = THIS_MODULE, | |
507 | .name = DRVNAME, | |
508 | }, | |
509 | .probe = pc87427_probe, | |
510 | .remove = __devexit_p(pc87427_remove), | |
511 | }; | |
512 | ||
513 | static int __init pc87427_device_add(unsigned short address) | |
514 | { | |
515 | struct resource res = { | |
516 | .start = address, | |
517 | .end = address + REGION_LENGTH - 1, | |
518 | .name = logdev_str[0], | |
519 | .flags = IORESOURCE_IO, | |
520 | }; | |
521 | int err; | |
522 | ||
523 | pdev = platform_device_alloc(DRVNAME, address); | |
524 | if (!pdev) { | |
525 | err = -ENOMEM; | |
526 | printk(KERN_ERR DRVNAME ": Device allocation failed\n"); | |
527 | goto exit; | |
528 | } | |
529 | ||
530 | err = platform_device_add_resources(pdev, &res, 1); | |
531 | if (err) { | |
532 | printk(KERN_ERR DRVNAME ": Device resource addition failed " | |
533 | "(%d)\n", err); | |
534 | goto exit_device_put; | |
535 | } | |
536 | ||
537 | err = platform_device_add(pdev); | |
538 | if (err) { | |
539 | printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", | |
540 | err); | |
541 | goto exit_device_put; | |
542 | } | |
543 | ||
544 | return 0; | |
545 | ||
546 | exit_device_put: | |
547 | platform_device_put(pdev); | |
548 | exit: | |
549 | return err; | |
550 | } | |
551 | ||
552 | static int __init pc87427_find(int sioaddr, unsigned short *address) | |
553 | { | |
554 | u16 val; | |
555 | int i, err = 0; | |
556 | ||
557 | /* Identify device */ | |
558 | val = superio_inb(sioaddr, SIOREG_DEVID); | |
559 | if (val != 0xf2) { /* PC87427 */ | |
560 | err = -ENODEV; | |
561 | goto exit; | |
562 | } | |
563 | ||
564 | for (i = 0; i < 2; i++) { | |
565 | address[i] = 0; | |
566 | /* Select logical device */ | |
567 | superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]); | |
568 | ||
569 | val = superio_inb(sioaddr, SIOREG_ACT); | |
570 | if (!(val & 0x01)) { | |
571 | printk(KERN_INFO DRVNAME ": Logical device 0x%02x " | |
572 | "not activated\n", logdev[i]); | |
573 | continue; | |
574 | } | |
575 | ||
576 | val = superio_inb(sioaddr, SIOREG_MAP); | |
577 | if (val & 0x01) { | |
578 | printk(KERN_WARNING DRVNAME ": Logical device 0x%02x " | |
579 | "is memory-mapped, can't use\n", logdev[i]); | |
580 | continue; | |
581 | } | |
582 | ||
583 | val = (superio_inb(sioaddr, SIOREG_IOBASE) << 8) | |
584 | | superio_inb(sioaddr, SIOREG_IOBASE + 1); | |
585 | if (!val) { | |
586 | printk(KERN_INFO DRVNAME ": I/O base address not set " | |
587 | "for logical device 0x%02x\n", logdev[i]); | |
588 | continue; | |
589 | } | |
590 | address[i] = val; | |
591 | } | |
592 | ||
593 | exit: | |
594 | superio_exit(sioaddr); | |
595 | return err; | |
596 | } | |
597 | ||
598 | static int __init pc87427_init(void) | |
599 | { | |
600 | int err; | |
601 | unsigned short address[2]; | |
602 | ||
603 | if (pc87427_find(0x2e, address) | |
604 | && pc87427_find(0x4e, address)) | |
605 | return -ENODEV; | |
606 | ||
607 | /* For now the driver only handles fans so we only care about the | |
608 | first address. */ | |
609 | if (!address[0]) | |
610 | return -ENODEV; | |
611 | ||
612 | err = platform_driver_register(&pc87427_driver); | |
613 | if (err) | |
614 | goto exit; | |
615 | ||
616 | /* Sets global pdev as a side effect */ | |
617 | err = pc87427_device_add(address[0]); | |
618 | if (err) | |
619 | goto exit_driver; | |
620 | ||
621 | return 0; | |
622 | ||
623 | exit_driver: | |
624 | platform_driver_unregister(&pc87427_driver); | |
625 | exit: | |
626 | return err; | |
627 | } | |
628 | ||
629 | static void __exit pc87427_exit(void) | |
630 | { | |
631 | platform_device_unregister(pdev); | |
632 | platform_driver_unregister(&pc87427_driver); | |
633 | } | |
634 | ||
635 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); | |
636 | MODULE_DESCRIPTION("PC87427 hardware monitoring driver"); | |
637 | MODULE_LICENSE("GPL"); | |
638 | ||
639 | module_init(pc87427_init); | |
640 | module_exit(pc87427_exit); |