Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | smsc47b397.c - Part of lm_sensors, Linux kernel modules | |
3 | for hardware monitoring | |
4 | ||
5 | Supports the SMSC LPC47B397-NC Super-I/O chip. | |
6 | ||
7 | Author/Maintainer: Mark M. Hoffman <mhoffman@lightlink.com> | |
8 | Copyright (C) 2004 Utilitek Systems, Inc. | |
9 | ||
10 | derived in part from smsc47m1.c: | |
11 | Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> | |
12 | Copyright (C) 2004 Jean Delvare <khali@linux-fr.org> | |
13 | ||
14 | This program is free software; you can redistribute it and/or modify | |
15 | it under the terms of the GNU General Public License as published by | |
16 | the Free Software Foundation; either version 2 of the License, or | |
17 | (at your option) any later version. | |
18 | ||
19 | This program is distributed in the hope that it will be useful, | |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
23 | ||
24 | You should have received a copy of the GNU General Public License | |
25 | along with this program; if not, write to the Free Software | |
26 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
27 | */ | |
28 | ||
29 | #include <linux/module.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/ioport.h> | |
32 | #include <linux/jiffies.h> | |
292fc1a5 | 33 | #include <linux/platform_device.h> |
943b0830 MH |
34 | #include <linux/hwmon.h> |
35 | #include <linux/err.h> | |
1da177e4 | 36 | #include <linux/init.h> |
9a61bf63 | 37 | #include <linux/mutex.h> |
1da177e4 LT |
38 | #include <asm/io.h> |
39 | ||
292fc1a5 JD |
40 | static struct platform_device *pdev; |
41 | ||
42 | #define DRVNAME "smsc47b397" | |
1da177e4 LT |
43 | |
44 | /* Super-I/0 registers and commands */ | |
45 | ||
46 | #define REG 0x2e /* The register to read/write */ | |
47 | #define VAL 0x2f /* The value to read/write */ | |
48 | ||
49 | static inline void superio_outb(int reg, int val) | |
50 | { | |
51 | outb(reg, REG); | |
52 | outb(val, VAL); | |
53 | } | |
54 | ||
55 | static inline int superio_inb(int reg) | |
56 | { | |
57 | outb(reg, REG); | |
58 | return inb(VAL); | |
59 | } | |
60 | ||
61 | /* select superio logical device */ | |
62 | static inline void superio_select(int ld) | |
63 | { | |
64 | superio_outb(0x07, ld); | |
65 | } | |
66 | ||
67 | static inline void superio_enter(void) | |
68 | { | |
69 | outb(0x55, REG); | |
70 | } | |
71 | ||
72 | static inline void superio_exit(void) | |
73 | { | |
74 | outb(0xAA, REG); | |
75 | } | |
76 | ||
77 | #define SUPERIO_REG_DEVID 0x20 | |
78 | #define SUPERIO_REG_DEVREV 0x21 | |
79 | #define SUPERIO_REG_BASE_MSB 0x60 | |
80 | #define SUPERIO_REG_BASE_LSB 0x61 | |
81 | #define SUPERIO_REG_LD8 0x08 | |
82 | ||
83 | #define SMSC_EXTENT 0x02 | |
84 | ||
85 | /* 0 <= nr <= 3 */ | |
86 | static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80}; | |
87 | #define SMSC47B397_REG_TEMP(nr) (smsc47b397_reg_temp[(nr)]) | |
88 | ||
89 | /* 0 <= nr <= 3 */ | |
90 | #define SMSC47B397_REG_FAN_LSB(nr) (0x28 + 2 * (nr)) | |
91 | #define SMSC47B397_REG_FAN_MSB(nr) (0x29 + 2 * (nr)) | |
92 | ||
93 | struct smsc47b397_data { | |
292fc1a5 JD |
94 | unsigned short addr; |
95 | const char *name; | |
943b0830 | 96 | struct class_device *class_dev; |
9a61bf63 | 97 | struct mutex lock; |
1da177e4 | 98 | |
9a61bf63 | 99 | struct mutex update_lock; |
1da177e4 LT |
100 | unsigned long last_updated; /* in jiffies */ |
101 | int valid; | |
102 | ||
103 | /* register values */ | |
104 | u16 fan[4]; | |
105 | u8 temp[4]; | |
106 | }; | |
107 | ||
292fc1a5 | 108 | static int smsc47b397_read_value(struct smsc47b397_data* data, u8 reg) |
1da177e4 | 109 | { |
1da177e4 LT |
110 | int res; |
111 | ||
9a61bf63 | 112 | mutex_lock(&data->lock); |
292fc1a5 JD |
113 | outb(reg, data->addr); |
114 | res = inb_p(data->addr + 1); | |
9a61bf63 | 115 | mutex_unlock(&data->lock); |
1da177e4 LT |
116 | return res; |
117 | } | |
118 | ||
119 | static struct smsc47b397_data *smsc47b397_update_device(struct device *dev) | |
120 | { | |
292fc1a5 | 121 | struct smsc47b397_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
122 | int i; |
123 | ||
9a61bf63 | 124 | mutex_lock(&data->update_lock); |
1da177e4 LT |
125 | |
126 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
292fc1a5 | 127 | dev_dbg(dev, "starting device update...\n"); |
1da177e4 LT |
128 | |
129 | /* 4 temperature inputs, 4 fan inputs */ | |
130 | for (i = 0; i < 4; i++) { | |
292fc1a5 | 131 | data->temp[i] = smsc47b397_read_value(data, |
1da177e4 LT |
132 | SMSC47B397_REG_TEMP(i)); |
133 | ||
134 | /* must read LSB first */ | |
292fc1a5 | 135 | data->fan[i] = smsc47b397_read_value(data, |
1da177e4 | 136 | SMSC47B397_REG_FAN_LSB(i)); |
292fc1a5 | 137 | data->fan[i] |= smsc47b397_read_value(data, |
1da177e4 LT |
138 | SMSC47B397_REG_FAN_MSB(i)) << 8; |
139 | } | |
140 | ||
141 | data->last_updated = jiffies; | |
142 | data->valid = 1; | |
143 | ||
292fc1a5 | 144 | dev_dbg(dev, "... device update complete\n"); |
1da177e4 LT |
145 | } |
146 | ||
9a61bf63 | 147 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
148 | |
149 | return data; | |
150 | } | |
151 | ||
152 | /* TEMP: 0.001C/bit (-128C to +127C) | |
153 | REG: 1C/bit, two's complement */ | |
154 | static int temp_from_reg(u8 reg) | |
155 | { | |
156 | return (s8)reg * 1000; | |
157 | } | |
158 | ||
159 | /* 0 <= nr <= 3 */ | |
160 | static ssize_t show_temp(struct device *dev, char *buf, int nr) | |
161 | { | |
162 | struct smsc47b397_data *data = smsc47b397_update_device(dev); | |
163 | return sprintf(buf, "%d\n", temp_from_reg(data->temp[nr])); | |
164 | } | |
165 | ||
166 | #define sysfs_temp(num) \ | |
a5099cfc | 167 | static ssize_t show_temp##num(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
168 | { \ |
169 | return show_temp(dev, buf, num-1); \ | |
170 | } \ | |
171 | static DEVICE_ATTR(temp##num##_input, S_IRUGO, show_temp##num, NULL) | |
172 | ||
173 | sysfs_temp(1); | |
174 | sysfs_temp(2); | |
175 | sysfs_temp(3); | |
176 | sysfs_temp(4); | |
177 | ||
1da177e4 LT |
178 | /* FAN: 1 RPM/bit |
179 | REG: count of 90kHz pulses / revolution */ | |
180 | static int fan_from_reg(u16 reg) | |
181 | { | |
182 | return 90000 * 60 / reg; | |
183 | } | |
184 | ||
185 | /* 0 <= nr <= 3 */ | |
186 | static ssize_t show_fan(struct device *dev, char *buf, int nr) | |
187 | { | |
188 | struct smsc47b397_data *data = smsc47b397_update_device(dev); | |
189 | return sprintf(buf, "%d\n", fan_from_reg(data->fan[nr])); | |
190 | } | |
191 | ||
192 | #define sysfs_fan(num) \ | |
a5099cfc | 193 | static ssize_t show_fan##num(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
194 | { \ |
195 | return show_fan(dev, buf, num-1); \ | |
196 | } \ | |
197 | static DEVICE_ATTR(fan##num##_input, S_IRUGO, show_fan##num, NULL) | |
198 | ||
199 | sysfs_fan(1); | |
200 | sysfs_fan(2); | |
201 | sysfs_fan(3); | |
202 | sysfs_fan(4); | |
203 | ||
292fc1a5 JD |
204 | static ssize_t show_name(struct device *dev, struct device_attribute |
205 | *devattr, char *buf) | |
206 | { | |
207 | struct smsc47b397_data *data = dev_get_drvdata(dev); | |
208 | return sprintf(buf, "%s\n", data->name); | |
209 | } | |
210 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
211 | ||
c1685f61 MH |
212 | static struct attribute *smsc47b397_attributes[] = { |
213 | &dev_attr_temp1_input.attr, | |
214 | &dev_attr_temp2_input.attr, | |
215 | &dev_attr_temp3_input.attr, | |
216 | &dev_attr_temp4_input.attr, | |
217 | &dev_attr_fan1_input.attr, | |
218 | &dev_attr_fan2_input.attr, | |
219 | &dev_attr_fan3_input.attr, | |
220 | &dev_attr_fan4_input.attr, | |
221 | ||
292fc1a5 | 222 | &dev_attr_name.attr, |
c1685f61 MH |
223 | NULL |
224 | }; | |
225 | ||
226 | static const struct attribute_group smsc47b397_group = { | |
227 | .attrs = smsc47b397_attributes, | |
228 | }; | |
1da177e4 | 229 | |
292fc1a5 | 230 | static int __devexit smsc47b397_remove(struct platform_device *pdev) |
1da177e4 | 231 | { |
292fc1a5 JD |
232 | struct smsc47b397_data *data = platform_get_drvdata(pdev); |
233 | struct resource *res; | |
1da177e4 | 234 | |
943b0830 | 235 | hwmon_device_unregister(data->class_dev); |
292fc1a5 JD |
236 | sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group); |
237 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
238 | release_region(res->start, SMSC_EXTENT); | |
943b0830 | 239 | kfree(data); |
1da177e4 LT |
240 | |
241 | return 0; | |
242 | } | |
243 | ||
292fc1a5 | 244 | static int smsc47b397_probe(struct platform_device *pdev); |
2d8672c5 | 245 | |
292fc1a5 | 246 | static struct platform_driver smsc47b397_driver = { |
cdaf7934 | 247 | .driver = { |
87218842 | 248 | .owner = THIS_MODULE, |
292fc1a5 | 249 | .name = DRVNAME, |
cdaf7934 | 250 | }, |
292fc1a5 JD |
251 | .probe = smsc47b397_probe, |
252 | .remove = __devexit_p(smsc47b397_remove), | |
1da177e4 LT |
253 | }; |
254 | ||
292fc1a5 | 255 | static int __devinit smsc47b397_probe(struct platform_device *pdev) |
1da177e4 | 256 | { |
292fc1a5 | 257 | struct device *dev = &pdev->dev; |
1da177e4 | 258 | struct smsc47b397_data *data; |
292fc1a5 | 259 | struct resource *res; |
1da177e4 LT |
260 | int err = 0; |
261 | ||
292fc1a5 JD |
262 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
263 | if (!request_region(res->start, SMSC_EXTENT, | |
cdaf7934 | 264 | smsc47b397_driver.driver.name)) { |
292fc1a5 JD |
265 | dev_err(dev, "Region 0x%lx-0x%lx already in use!\n", |
266 | (unsigned long)res->start, | |
267 | (unsigned long)res->start + SMSC_EXTENT - 1); | |
1da177e4 LT |
268 | return -EBUSY; |
269 | } | |
270 | ||
ba9c2e8d | 271 | if (!(data = kzalloc(sizeof(struct smsc47b397_data), GFP_KERNEL))) { |
1da177e4 LT |
272 | err = -ENOMEM; |
273 | goto error_release; | |
274 | } | |
1da177e4 | 275 | |
292fc1a5 JD |
276 | data->addr = res->start; |
277 | data->name = "smsc47b397"; | |
9a61bf63 | 278 | mutex_init(&data->lock); |
9a61bf63 | 279 | mutex_init(&data->update_lock); |
292fc1a5 | 280 | platform_set_drvdata(pdev, data); |
1da177e4 | 281 | |
292fc1a5 | 282 | if ((err = sysfs_create_group(&dev->kobj, &smsc47b397_group))) |
1da177e4 LT |
283 | goto error_free; |
284 | ||
292fc1a5 | 285 | data->class_dev = hwmon_device_register(dev); |
943b0830 MH |
286 | if (IS_ERR(data->class_dev)) { |
287 | err = PTR_ERR(data->class_dev); | |
c1685f61 | 288 | goto error_remove; |
943b0830 MH |
289 | } |
290 | ||
1da177e4 LT |
291 | return 0; |
292 | ||
c1685f61 | 293 | error_remove: |
292fc1a5 | 294 | sysfs_remove_group(&dev->kobj, &smsc47b397_group); |
1da177e4 | 295 | error_free: |
1f57ff89 | 296 | kfree(data); |
1da177e4 | 297 | error_release: |
292fc1a5 JD |
298 | release_region(res->start, SMSC_EXTENT); |
299 | return err; | |
300 | } | |
301 | ||
302 | static int __init smsc47b397_device_add(unsigned short address) | |
303 | { | |
304 | struct resource res = { | |
305 | .start = address, | |
306 | .end = address + SMSC_EXTENT - 1, | |
307 | .name = DRVNAME, | |
308 | .flags = IORESOURCE_IO, | |
309 | }; | |
310 | int err; | |
311 | ||
312 | pdev = platform_device_alloc(DRVNAME, address); | |
313 | if (!pdev) { | |
314 | err = -ENOMEM; | |
315 | printk(KERN_ERR DRVNAME ": Device allocation failed\n"); | |
316 | goto exit; | |
317 | } | |
318 | ||
319 | err = platform_device_add_resources(pdev, &res, 1); | |
320 | if (err) { | |
321 | printk(KERN_ERR DRVNAME ": Device resource addition failed " | |
322 | "(%d)\n", err); | |
323 | goto exit_device_put; | |
324 | } | |
325 | ||
326 | err = platform_device_add(pdev); | |
327 | if (err) { | |
328 | printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", | |
329 | err); | |
330 | goto exit_device_put; | |
331 | } | |
332 | ||
333 | return 0; | |
334 | ||
335 | exit_device_put: | |
336 | platform_device_put(pdev); | |
337 | exit: | |
1da177e4 LT |
338 | return err; |
339 | } | |
340 | ||
2d8672c5 | 341 | static int __init smsc47b397_find(unsigned short *addr) |
1da177e4 LT |
342 | { |
343 | u8 id, rev; | |
344 | ||
345 | superio_enter(); | |
346 | id = superio_inb(SUPERIO_REG_DEVID); | |
347 | ||
7ab83a91 | 348 | if ((id != 0x6f) && (id != 0x81)) { |
1da177e4 LT |
349 | superio_exit(); |
350 | return -ENODEV; | |
351 | } | |
352 | ||
353 | rev = superio_inb(SUPERIO_REG_DEVREV); | |
354 | ||
355 | superio_select(SUPERIO_REG_LD8); | |
356 | *addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8) | |
357 | | superio_inb(SUPERIO_REG_BASE_LSB); | |
358 | ||
292fc1a5 | 359 | printk(KERN_INFO DRVNAME ": found SMSC %s " |
7ab83a91 MH |
360 | "(base address 0x%04x, revision %u)\n", |
361 | id == 0x81 ? "SCH5307-NS" : "LPC47B397-NC", *addr, rev); | |
1da177e4 LT |
362 | |
363 | superio_exit(); | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static int __init smsc47b397_init(void) | |
368 | { | |
292fc1a5 | 369 | unsigned short address; |
1da177e4 LT |
370 | int ret; |
371 | ||
2d8672c5 | 372 | if ((ret = smsc47b397_find(&address))) |
1da177e4 LT |
373 | return ret; |
374 | ||
292fc1a5 JD |
375 | ret = platform_driver_register(&smsc47b397_driver); |
376 | if (ret) | |
377 | goto exit; | |
378 | ||
379 | /* Sets global pdev as a side effect */ | |
380 | ret = smsc47b397_device_add(address); | |
381 | if (ret) | |
382 | goto exit_driver; | |
383 | ||
384 | return 0; | |
385 | ||
386 | exit_driver: | |
387 | platform_driver_unregister(&smsc47b397_driver); | |
388 | exit: | |
389 | return ret; | |
1da177e4 LT |
390 | } |
391 | ||
392 | static void __exit smsc47b397_exit(void) | |
393 | { | |
292fc1a5 JD |
394 | platform_device_unregister(pdev); |
395 | platform_driver_unregister(&smsc47b397_driver); | |
1da177e4 LT |
396 | } |
397 | ||
398 | MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); | |
399 | MODULE_DESCRIPTION("SMSC LPC47B397 driver"); | |
400 | MODULE_LICENSE("GPL"); | |
401 | ||
402 | module_init(smsc47b397_init); | |
403 | module_exit(smsc47b397_exit); |