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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 | 34 | #include <linux/hwmon.h> |
3659a017 | 35 | #include <linux/hwmon-sysfs.h> |
943b0830 | 36 | #include <linux/err.h> |
1da177e4 | 37 | #include <linux/init.h> |
9a61bf63 | 38 | #include <linux/mutex.h> |
1da177e4 LT |
39 | #include <asm/io.h> |
40 | ||
292fc1a5 JD |
41 | static struct platform_device *pdev; |
42 | ||
43 | #define DRVNAME "smsc47b397" | |
1da177e4 LT |
44 | |
45 | /* Super-I/0 registers and commands */ | |
46 | ||
47 | #define REG 0x2e /* The register to read/write */ | |
48 | #define VAL 0x2f /* The value to read/write */ | |
49 | ||
50 | static inline void superio_outb(int reg, int val) | |
51 | { | |
52 | outb(reg, REG); | |
53 | outb(val, VAL); | |
54 | } | |
55 | ||
56 | static inline int superio_inb(int reg) | |
57 | { | |
58 | outb(reg, REG); | |
59 | return inb(VAL); | |
60 | } | |
61 | ||
62 | /* select superio logical device */ | |
63 | static inline void superio_select(int ld) | |
64 | { | |
65 | superio_outb(0x07, ld); | |
66 | } | |
67 | ||
68 | static inline void superio_enter(void) | |
69 | { | |
70 | outb(0x55, REG); | |
71 | } | |
72 | ||
73 | static inline void superio_exit(void) | |
74 | { | |
75 | outb(0xAA, REG); | |
76 | } | |
77 | ||
78 | #define SUPERIO_REG_DEVID 0x20 | |
79 | #define SUPERIO_REG_DEVREV 0x21 | |
80 | #define SUPERIO_REG_BASE_MSB 0x60 | |
81 | #define SUPERIO_REG_BASE_LSB 0x61 | |
82 | #define SUPERIO_REG_LD8 0x08 | |
83 | ||
84 | #define SMSC_EXTENT 0x02 | |
85 | ||
86 | /* 0 <= nr <= 3 */ | |
87 | static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80}; | |
88 | #define SMSC47B397_REG_TEMP(nr) (smsc47b397_reg_temp[(nr)]) | |
89 | ||
90 | /* 0 <= nr <= 3 */ | |
91 | #define SMSC47B397_REG_FAN_LSB(nr) (0x28 + 2 * (nr)) | |
92 | #define SMSC47B397_REG_FAN_MSB(nr) (0x29 + 2 * (nr)) | |
93 | ||
94 | struct smsc47b397_data { | |
292fc1a5 JD |
95 | unsigned short addr; |
96 | const char *name; | |
943b0830 | 97 | struct class_device *class_dev; |
9a61bf63 | 98 | struct mutex lock; |
1da177e4 | 99 | |
9a61bf63 | 100 | struct mutex update_lock; |
1da177e4 LT |
101 | unsigned long last_updated; /* in jiffies */ |
102 | int valid; | |
103 | ||
104 | /* register values */ | |
105 | u16 fan[4]; | |
106 | u8 temp[4]; | |
107 | }; | |
108 | ||
292fc1a5 | 109 | static int smsc47b397_read_value(struct smsc47b397_data* data, u8 reg) |
1da177e4 | 110 | { |
1da177e4 LT |
111 | int res; |
112 | ||
9a61bf63 | 113 | mutex_lock(&data->lock); |
292fc1a5 JD |
114 | outb(reg, data->addr); |
115 | res = inb_p(data->addr + 1); | |
9a61bf63 | 116 | mutex_unlock(&data->lock); |
1da177e4 LT |
117 | return res; |
118 | } | |
119 | ||
120 | static struct smsc47b397_data *smsc47b397_update_device(struct device *dev) | |
121 | { | |
292fc1a5 | 122 | struct smsc47b397_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
123 | int i; |
124 | ||
9a61bf63 | 125 | mutex_lock(&data->update_lock); |
1da177e4 LT |
126 | |
127 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
292fc1a5 | 128 | dev_dbg(dev, "starting device update...\n"); |
1da177e4 LT |
129 | |
130 | /* 4 temperature inputs, 4 fan inputs */ | |
131 | for (i = 0; i < 4; i++) { | |
292fc1a5 | 132 | data->temp[i] = smsc47b397_read_value(data, |
1da177e4 LT |
133 | SMSC47B397_REG_TEMP(i)); |
134 | ||
135 | /* must read LSB first */ | |
292fc1a5 | 136 | data->fan[i] = smsc47b397_read_value(data, |
1da177e4 | 137 | SMSC47B397_REG_FAN_LSB(i)); |
292fc1a5 | 138 | data->fan[i] |= smsc47b397_read_value(data, |
1da177e4 LT |
139 | SMSC47B397_REG_FAN_MSB(i)) << 8; |
140 | } | |
141 | ||
142 | data->last_updated = jiffies; | |
143 | data->valid = 1; | |
144 | ||
292fc1a5 | 145 | dev_dbg(dev, "... device update complete\n"); |
1da177e4 LT |
146 | } |
147 | ||
9a61bf63 | 148 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
149 | |
150 | return data; | |
151 | } | |
152 | ||
153 | /* TEMP: 0.001C/bit (-128C to +127C) | |
154 | REG: 1C/bit, two's complement */ | |
155 | static int temp_from_reg(u8 reg) | |
156 | { | |
157 | return (s8)reg * 1000; | |
158 | } | |
159 | ||
3659a017 JD |
160 | static ssize_t show_temp(struct device *dev, struct device_attribute |
161 | *devattr, char *buf) | |
1da177e4 | 162 | { |
3659a017 | 163 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 164 | struct smsc47b397_data *data = smsc47b397_update_device(dev); |
3659a017 | 165 | return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index])); |
1da177e4 LT |
166 | } |
167 | ||
3659a017 JD |
168 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); |
169 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); | |
170 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); | |
171 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); | |
1da177e4 | 172 | |
1da177e4 LT |
173 | /* FAN: 1 RPM/bit |
174 | REG: count of 90kHz pulses / revolution */ | |
175 | static int fan_from_reg(u16 reg) | |
176 | { | |
90205c6c JD |
177 | if (reg == 0 || reg == 0xffff) |
178 | return 0; | |
1da177e4 LT |
179 | return 90000 * 60 / reg; |
180 | } | |
181 | ||
3659a017 JD |
182 | static ssize_t show_fan(struct device *dev, struct device_attribute |
183 | *devattr, char *buf) | |
1da177e4 | 184 | { |
3659a017 JD |
185 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
186 | struct smsc47b397_data *data = smsc47b397_update_device(dev); | |
187 | return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index])); | |
1da177e4 | 188 | } |
3659a017 JD |
189 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); |
190 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); | |
191 | static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); | |
192 | static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); | |
1da177e4 | 193 | |
292fc1a5 JD |
194 | static ssize_t show_name(struct device *dev, struct device_attribute |
195 | *devattr, char *buf) | |
196 | { | |
197 | struct smsc47b397_data *data = dev_get_drvdata(dev); | |
198 | return sprintf(buf, "%s\n", data->name); | |
199 | } | |
200 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
201 | ||
c1685f61 | 202 | static struct attribute *smsc47b397_attributes[] = { |
3659a017 JD |
203 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
204 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
205 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
206 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
207 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
208 | &sensor_dev_attr_fan2_input.dev_attr.attr, | |
209 | &sensor_dev_attr_fan3_input.dev_attr.attr, | |
210 | &sensor_dev_attr_fan4_input.dev_attr.attr, | |
c1685f61 | 211 | |
292fc1a5 | 212 | &dev_attr_name.attr, |
c1685f61 MH |
213 | NULL |
214 | }; | |
215 | ||
216 | static const struct attribute_group smsc47b397_group = { | |
217 | .attrs = smsc47b397_attributes, | |
218 | }; | |
1da177e4 | 219 | |
292fc1a5 | 220 | static int __devexit smsc47b397_remove(struct platform_device *pdev) |
1da177e4 | 221 | { |
292fc1a5 JD |
222 | struct smsc47b397_data *data = platform_get_drvdata(pdev); |
223 | struct resource *res; | |
1da177e4 | 224 | |
943b0830 | 225 | hwmon_device_unregister(data->class_dev); |
292fc1a5 JD |
226 | sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group); |
227 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
228 | release_region(res->start, SMSC_EXTENT); | |
943b0830 | 229 | kfree(data); |
1da177e4 LT |
230 | |
231 | return 0; | |
232 | } | |
233 | ||
292fc1a5 | 234 | static int smsc47b397_probe(struct platform_device *pdev); |
2d8672c5 | 235 | |
292fc1a5 | 236 | static struct platform_driver smsc47b397_driver = { |
cdaf7934 | 237 | .driver = { |
87218842 | 238 | .owner = THIS_MODULE, |
292fc1a5 | 239 | .name = DRVNAME, |
cdaf7934 | 240 | }, |
292fc1a5 JD |
241 | .probe = smsc47b397_probe, |
242 | .remove = __devexit_p(smsc47b397_remove), | |
1da177e4 LT |
243 | }; |
244 | ||
292fc1a5 | 245 | static int __devinit smsc47b397_probe(struct platform_device *pdev) |
1da177e4 | 246 | { |
292fc1a5 | 247 | struct device *dev = &pdev->dev; |
1da177e4 | 248 | struct smsc47b397_data *data; |
292fc1a5 | 249 | struct resource *res; |
1da177e4 LT |
250 | int err = 0; |
251 | ||
292fc1a5 JD |
252 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
253 | if (!request_region(res->start, SMSC_EXTENT, | |
cdaf7934 | 254 | smsc47b397_driver.driver.name)) { |
292fc1a5 JD |
255 | dev_err(dev, "Region 0x%lx-0x%lx already in use!\n", |
256 | (unsigned long)res->start, | |
257 | (unsigned long)res->start + SMSC_EXTENT - 1); | |
1da177e4 LT |
258 | return -EBUSY; |
259 | } | |
260 | ||
ba9c2e8d | 261 | if (!(data = kzalloc(sizeof(struct smsc47b397_data), GFP_KERNEL))) { |
1da177e4 LT |
262 | err = -ENOMEM; |
263 | goto error_release; | |
264 | } | |
1da177e4 | 265 | |
292fc1a5 JD |
266 | data->addr = res->start; |
267 | data->name = "smsc47b397"; | |
9a61bf63 | 268 | mutex_init(&data->lock); |
9a61bf63 | 269 | mutex_init(&data->update_lock); |
292fc1a5 | 270 | platform_set_drvdata(pdev, data); |
1da177e4 | 271 | |
292fc1a5 | 272 | if ((err = sysfs_create_group(&dev->kobj, &smsc47b397_group))) |
1da177e4 LT |
273 | goto error_free; |
274 | ||
292fc1a5 | 275 | data->class_dev = hwmon_device_register(dev); |
943b0830 MH |
276 | if (IS_ERR(data->class_dev)) { |
277 | err = PTR_ERR(data->class_dev); | |
c1685f61 | 278 | goto error_remove; |
943b0830 MH |
279 | } |
280 | ||
1da177e4 LT |
281 | return 0; |
282 | ||
c1685f61 | 283 | error_remove: |
292fc1a5 | 284 | sysfs_remove_group(&dev->kobj, &smsc47b397_group); |
1da177e4 | 285 | error_free: |
1f57ff89 | 286 | kfree(data); |
1da177e4 | 287 | error_release: |
292fc1a5 JD |
288 | release_region(res->start, SMSC_EXTENT); |
289 | return err; | |
290 | } | |
291 | ||
292 | static int __init smsc47b397_device_add(unsigned short address) | |
293 | { | |
294 | struct resource res = { | |
295 | .start = address, | |
296 | .end = address + SMSC_EXTENT - 1, | |
297 | .name = DRVNAME, | |
298 | .flags = IORESOURCE_IO, | |
299 | }; | |
300 | int err; | |
301 | ||
302 | pdev = platform_device_alloc(DRVNAME, address); | |
303 | if (!pdev) { | |
304 | err = -ENOMEM; | |
305 | printk(KERN_ERR DRVNAME ": Device allocation failed\n"); | |
306 | goto exit; | |
307 | } | |
308 | ||
309 | err = platform_device_add_resources(pdev, &res, 1); | |
310 | if (err) { | |
311 | printk(KERN_ERR DRVNAME ": Device resource addition failed " | |
312 | "(%d)\n", err); | |
313 | goto exit_device_put; | |
314 | } | |
315 | ||
316 | err = platform_device_add(pdev); | |
317 | if (err) { | |
318 | printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", | |
319 | err); | |
320 | goto exit_device_put; | |
321 | } | |
322 | ||
323 | return 0; | |
324 | ||
325 | exit_device_put: | |
326 | platform_device_put(pdev); | |
327 | exit: | |
1da177e4 LT |
328 | return err; |
329 | } | |
330 | ||
2d8672c5 | 331 | static int __init smsc47b397_find(unsigned short *addr) |
1da177e4 LT |
332 | { |
333 | u8 id, rev; | |
334 | ||
335 | superio_enter(); | |
336 | id = superio_inb(SUPERIO_REG_DEVID); | |
337 | ||
2dbbdb35 | 338 | if ((id != 0x6f) && (id != 0x81) && (id != 0x85)) { |
1da177e4 LT |
339 | superio_exit(); |
340 | return -ENODEV; | |
341 | } | |
342 | ||
343 | rev = superio_inb(SUPERIO_REG_DEVREV); | |
344 | ||
345 | superio_select(SUPERIO_REG_LD8); | |
346 | *addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8) | |
347 | | superio_inb(SUPERIO_REG_BASE_LSB); | |
348 | ||
292fc1a5 | 349 | printk(KERN_INFO DRVNAME ": found SMSC %s " |
7ab83a91 | 350 | "(base address 0x%04x, revision %u)\n", |
2dbbdb35 JH |
351 | id == 0x81 ? "SCH5307-NS" : id == 0x85 ? "SCH5317" : |
352 | "LPC47B397-NC", *addr, rev); | |
1da177e4 LT |
353 | |
354 | superio_exit(); | |
355 | return 0; | |
356 | } | |
357 | ||
358 | static int __init smsc47b397_init(void) | |
359 | { | |
292fc1a5 | 360 | unsigned short address; |
1da177e4 LT |
361 | int ret; |
362 | ||
2d8672c5 | 363 | if ((ret = smsc47b397_find(&address))) |
1da177e4 LT |
364 | return ret; |
365 | ||
292fc1a5 JD |
366 | ret = platform_driver_register(&smsc47b397_driver); |
367 | if (ret) | |
368 | goto exit; | |
369 | ||
370 | /* Sets global pdev as a side effect */ | |
371 | ret = smsc47b397_device_add(address); | |
372 | if (ret) | |
373 | goto exit_driver; | |
374 | ||
375 | return 0; | |
376 | ||
377 | exit_driver: | |
378 | platform_driver_unregister(&smsc47b397_driver); | |
379 | exit: | |
380 | return ret; | |
1da177e4 LT |
381 | } |
382 | ||
383 | static void __exit smsc47b397_exit(void) | |
384 | { | |
292fc1a5 JD |
385 | platform_device_unregister(pdev); |
386 | platform_driver_unregister(&smsc47b397_driver); | |
1da177e4 LT |
387 | } |
388 | ||
389 | MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); | |
390 | MODULE_DESCRIPTION("SMSC LPC47B397 driver"); | |
391 | MODULE_LICENSE("GPL"); | |
392 | ||
393 | module_init(smsc47b397_init); | |
394 | module_exit(smsc47b397_exit); |