Commit | Line | Data |
---|---|---|
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 | ||
67b671bc JD |
41 | static unsigned short force_id; |
42 | module_param(force_id, ushort, 0); | |
43 | MODULE_PARM_DESC(force_id, "Override the detected device ID"); | |
44 | ||
292fc1a5 JD |
45 | static struct platform_device *pdev; |
46 | ||
47 | #define DRVNAME "smsc47b397" | |
1da177e4 LT |
48 | |
49 | /* Super-I/0 registers and commands */ | |
50 | ||
51 | #define REG 0x2e /* The register to read/write */ | |
52 | #define VAL 0x2f /* The value to read/write */ | |
53 | ||
54 | static inline void superio_outb(int reg, int val) | |
55 | { | |
56 | outb(reg, REG); | |
57 | outb(val, VAL); | |
58 | } | |
59 | ||
60 | static inline int superio_inb(int reg) | |
61 | { | |
62 | outb(reg, REG); | |
63 | return inb(VAL); | |
64 | } | |
65 | ||
66 | /* select superio logical device */ | |
67 | static inline void superio_select(int ld) | |
68 | { | |
69 | superio_outb(0x07, ld); | |
70 | } | |
71 | ||
72 | static inline void superio_enter(void) | |
73 | { | |
74 | outb(0x55, REG); | |
75 | } | |
76 | ||
77 | static inline void superio_exit(void) | |
78 | { | |
79 | outb(0xAA, REG); | |
80 | } | |
81 | ||
82 | #define SUPERIO_REG_DEVID 0x20 | |
83 | #define SUPERIO_REG_DEVREV 0x21 | |
84 | #define SUPERIO_REG_BASE_MSB 0x60 | |
85 | #define SUPERIO_REG_BASE_LSB 0x61 | |
86 | #define SUPERIO_REG_LD8 0x08 | |
87 | ||
88 | #define SMSC_EXTENT 0x02 | |
89 | ||
90 | /* 0 <= nr <= 3 */ | |
91 | static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80}; | |
92 | #define SMSC47B397_REG_TEMP(nr) (smsc47b397_reg_temp[(nr)]) | |
93 | ||
94 | /* 0 <= nr <= 3 */ | |
95 | #define SMSC47B397_REG_FAN_LSB(nr) (0x28 + 2 * (nr)) | |
96 | #define SMSC47B397_REG_FAN_MSB(nr) (0x29 + 2 * (nr)) | |
97 | ||
98 | struct smsc47b397_data { | |
292fc1a5 JD |
99 | unsigned short addr; |
100 | const char *name; | |
1beeffe4 | 101 | struct device *hwmon_dev; |
9a61bf63 | 102 | struct mutex lock; |
1da177e4 | 103 | |
9a61bf63 | 104 | struct mutex update_lock; |
1da177e4 LT |
105 | unsigned long last_updated; /* in jiffies */ |
106 | int valid; | |
107 | ||
108 | /* register values */ | |
109 | u16 fan[4]; | |
110 | u8 temp[4]; | |
111 | }; | |
112 | ||
292fc1a5 | 113 | static int smsc47b397_read_value(struct smsc47b397_data* data, u8 reg) |
1da177e4 | 114 | { |
1da177e4 LT |
115 | int res; |
116 | ||
9a61bf63 | 117 | mutex_lock(&data->lock); |
292fc1a5 JD |
118 | outb(reg, data->addr); |
119 | res = inb_p(data->addr + 1); | |
9a61bf63 | 120 | mutex_unlock(&data->lock); |
1da177e4 LT |
121 | return res; |
122 | } | |
123 | ||
124 | static struct smsc47b397_data *smsc47b397_update_device(struct device *dev) | |
125 | { | |
292fc1a5 | 126 | struct smsc47b397_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
127 | int i; |
128 | ||
9a61bf63 | 129 | mutex_lock(&data->update_lock); |
1da177e4 LT |
130 | |
131 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { | |
292fc1a5 | 132 | dev_dbg(dev, "starting device update...\n"); |
1da177e4 LT |
133 | |
134 | /* 4 temperature inputs, 4 fan inputs */ | |
135 | for (i = 0; i < 4; i++) { | |
292fc1a5 | 136 | data->temp[i] = smsc47b397_read_value(data, |
1da177e4 LT |
137 | SMSC47B397_REG_TEMP(i)); |
138 | ||
139 | /* must read LSB first */ | |
292fc1a5 | 140 | data->fan[i] = smsc47b397_read_value(data, |
1da177e4 | 141 | SMSC47B397_REG_FAN_LSB(i)); |
292fc1a5 | 142 | data->fan[i] |= smsc47b397_read_value(data, |
1da177e4 LT |
143 | SMSC47B397_REG_FAN_MSB(i)) << 8; |
144 | } | |
145 | ||
146 | data->last_updated = jiffies; | |
147 | data->valid = 1; | |
148 | ||
292fc1a5 | 149 | dev_dbg(dev, "... device update complete\n"); |
1da177e4 LT |
150 | } |
151 | ||
9a61bf63 | 152 | mutex_unlock(&data->update_lock); |
1da177e4 LT |
153 | |
154 | return data; | |
155 | } | |
156 | ||
157 | /* TEMP: 0.001C/bit (-128C to +127C) | |
158 | REG: 1C/bit, two's complement */ | |
159 | static int temp_from_reg(u8 reg) | |
160 | { | |
161 | return (s8)reg * 1000; | |
162 | } | |
163 | ||
3659a017 JD |
164 | static ssize_t show_temp(struct device *dev, struct device_attribute |
165 | *devattr, char *buf) | |
1da177e4 | 166 | { |
3659a017 | 167 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
1da177e4 | 168 | struct smsc47b397_data *data = smsc47b397_update_device(dev); |
3659a017 | 169 | return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index])); |
1da177e4 LT |
170 | } |
171 | ||
3659a017 JD |
172 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); |
173 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); | |
174 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); | |
175 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); | |
1da177e4 | 176 | |
1da177e4 LT |
177 | /* FAN: 1 RPM/bit |
178 | REG: count of 90kHz pulses / revolution */ | |
179 | static int fan_from_reg(u16 reg) | |
180 | { | |
90205c6c JD |
181 | if (reg == 0 || reg == 0xffff) |
182 | return 0; | |
1da177e4 LT |
183 | return 90000 * 60 / reg; |
184 | } | |
185 | ||
3659a017 JD |
186 | static ssize_t show_fan(struct device *dev, struct device_attribute |
187 | *devattr, char *buf) | |
1da177e4 | 188 | { |
3659a017 JD |
189 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
190 | struct smsc47b397_data *data = smsc47b397_update_device(dev); | |
191 | return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index])); | |
1da177e4 | 192 | } |
3659a017 JD |
193 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); |
194 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); | |
195 | static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); | |
196 | static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); | |
1da177e4 | 197 | |
292fc1a5 JD |
198 | static ssize_t show_name(struct device *dev, struct device_attribute |
199 | *devattr, char *buf) | |
200 | { | |
201 | struct smsc47b397_data *data = dev_get_drvdata(dev); | |
202 | return sprintf(buf, "%s\n", data->name); | |
203 | } | |
204 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
205 | ||
c1685f61 | 206 | static struct attribute *smsc47b397_attributes[] = { |
3659a017 JD |
207 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
208 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
209 | &sensor_dev_attr_temp3_input.dev_attr.attr, | |
210 | &sensor_dev_attr_temp4_input.dev_attr.attr, | |
211 | &sensor_dev_attr_fan1_input.dev_attr.attr, | |
212 | &sensor_dev_attr_fan2_input.dev_attr.attr, | |
213 | &sensor_dev_attr_fan3_input.dev_attr.attr, | |
214 | &sensor_dev_attr_fan4_input.dev_attr.attr, | |
c1685f61 | 215 | |
292fc1a5 | 216 | &dev_attr_name.attr, |
c1685f61 MH |
217 | NULL |
218 | }; | |
219 | ||
220 | static const struct attribute_group smsc47b397_group = { | |
221 | .attrs = smsc47b397_attributes, | |
222 | }; | |
1da177e4 | 223 | |
292fc1a5 | 224 | static int __devexit smsc47b397_remove(struct platform_device *pdev) |
1da177e4 | 225 | { |
292fc1a5 JD |
226 | struct smsc47b397_data *data = platform_get_drvdata(pdev); |
227 | struct resource *res; | |
1da177e4 | 228 | |
1beeffe4 | 229 | hwmon_device_unregister(data->hwmon_dev); |
292fc1a5 JD |
230 | sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group); |
231 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
232 | release_region(res->start, SMSC_EXTENT); | |
943b0830 | 233 | kfree(data); |
1da177e4 LT |
234 | |
235 | return 0; | |
236 | } | |
237 | ||
292fc1a5 | 238 | static int smsc47b397_probe(struct platform_device *pdev); |
2d8672c5 | 239 | |
292fc1a5 | 240 | static struct platform_driver smsc47b397_driver = { |
cdaf7934 | 241 | .driver = { |
87218842 | 242 | .owner = THIS_MODULE, |
292fc1a5 | 243 | .name = DRVNAME, |
cdaf7934 | 244 | }, |
292fc1a5 JD |
245 | .probe = smsc47b397_probe, |
246 | .remove = __devexit_p(smsc47b397_remove), | |
1da177e4 LT |
247 | }; |
248 | ||
292fc1a5 | 249 | static int __devinit smsc47b397_probe(struct platform_device *pdev) |
1da177e4 | 250 | { |
292fc1a5 | 251 | struct device *dev = &pdev->dev; |
1da177e4 | 252 | struct smsc47b397_data *data; |
292fc1a5 | 253 | struct resource *res; |
1da177e4 LT |
254 | int err = 0; |
255 | ||
292fc1a5 JD |
256 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
257 | if (!request_region(res->start, SMSC_EXTENT, | |
cdaf7934 | 258 | smsc47b397_driver.driver.name)) { |
292fc1a5 JD |
259 | dev_err(dev, "Region 0x%lx-0x%lx already in use!\n", |
260 | (unsigned long)res->start, | |
261 | (unsigned long)res->start + SMSC_EXTENT - 1); | |
1da177e4 LT |
262 | return -EBUSY; |
263 | } | |
264 | ||
ba9c2e8d | 265 | if (!(data = kzalloc(sizeof(struct smsc47b397_data), GFP_KERNEL))) { |
1da177e4 LT |
266 | err = -ENOMEM; |
267 | goto error_release; | |
268 | } | |
1da177e4 | 269 | |
292fc1a5 JD |
270 | data->addr = res->start; |
271 | data->name = "smsc47b397"; | |
9a61bf63 | 272 | mutex_init(&data->lock); |
9a61bf63 | 273 | mutex_init(&data->update_lock); |
292fc1a5 | 274 | platform_set_drvdata(pdev, data); |
1da177e4 | 275 | |
292fc1a5 | 276 | if ((err = sysfs_create_group(&dev->kobj, &smsc47b397_group))) |
1da177e4 LT |
277 | goto error_free; |
278 | ||
1beeffe4 TJ |
279 | data->hwmon_dev = hwmon_device_register(dev); |
280 | if (IS_ERR(data->hwmon_dev)) { | |
281 | err = PTR_ERR(data->hwmon_dev); | |
c1685f61 | 282 | goto error_remove; |
943b0830 MH |
283 | } |
284 | ||
1da177e4 LT |
285 | return 0; |
286 | ||
c1685f61 | 287 | error_remove: |
292fc1a5 | 288 | sysfs_remove_group(&dev->kobj, &smsc47b397_group); |
1da177e4 | 289 | error_free: |
1f57ff89 | 290 | kfree(data); |
1da177e4 | 291 | error_release: |
292fc1a5 JD |
292 | release_region(res->start, SMSC_EXTENT); |
293 | return err; | |
294 | } | |
295 | ||
296 | static int __init smsc47b397_device_add(unsigned short address) | |
297 | { | |
298 | struct resource res = { | |
299 | .start = address, | |
300 | .end = address + SMSC_EXTENT - 1, | |
301 | .name = DRVNAME, | |
302 | .flags = IORESOURCE_IO, | |
303 | }; | |
304 | int err; | |
305 | ||
306 | pdev = platform_device_alloc(DRVNAME, address); | |
307 | if (!pdev) { | |
308 | err = -ENOMEM; | |
309 | printk(KERN_ERR DRVNAME ": Device allocation failed\n"); | |
310 | goto exit; | |
311 | } | |
312 | ||
313 | err = platform_device_add_resources(pdev, &res, 1); | |
314 | if (err) { | |
315 | printk(KERN_ERR DRVNAME ": Device resource addition failed " | |
316 | "(%d)\n", err); | |
317 | goto exit_device_put; | |
318 | } | |
319 | ||
320 | err = platform_device_add(pdev); | |
321 | if (err) { | |
322 | printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n", | |
323 | err); | |
324 | goto exit_device_put; | |
325 | } | |
326 | ||
327 | return 0; | |
328 | ||
329 | exit_device_put: | |
330 | platform_device_put(pdev); | |
331 | exit: | |
1da177e4 LT |
332 | return err; |
333 | } | |
334 | ||
2d8672c5 | 335 | static int __init smsc47b397_find(unsigned short *addr) |
1da177e4 LT |
336 | { |
337 | u8 id, rev; | |
80930776 | 338 | char *name; |
1da177e4 LT |
339 | |
340 | superio_enter(); | |
67b671bc | 341 | id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID); |
1da177e4 | 342 | |
80930776 CK |
343 | switch(id) { |
344 | case 0x81: | |
345 | name = "SCH5307-NS"; | |
346 | break; | |
347 | case 0x6f: | |
348 | name = "LPC47B397-NC"; | |
349 | break; | |
350 | case 0x85: | |
351 | case 0x8c: | |
352 | name = "SCH5317"; | |
353 | break; | |
354 | default: | |
1da177e4 LT |
355 | superio_exit(); |
356 | return -ENODEV; | |
357 | } | |
358 | ||
359 | rev = superio_inb(SUPERIO_REG_DEVREV); | |
360 | ||
361 | superio_select(SUPERIO_REG_LD8); | |
362 | *addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8) | |
363 | | superio_inb(SUPERIO_REG_BASE_LSB); | |
364 | ||
292fc1a5 | 365 | printk(KERN_INFO DRVNAME ": found SMSC %s " |
7ab83a91 | 366 | "(base address 0x%04x, revision %u)\n", |
80930776 | 367 | name, *addr, rev); |
1da177e4 LT |
368 | |
369 | superio_exit(); | |
370 | return 0; | |
371 | } | |
372 | ||
373 | static int __init smsc47b397_init(void) | |
374 | { | |
292fc1a5 | 375 | unsigned short address; |
1da177e4 LT |
376 | int ret; |
377 | ||
2d8672c5 | 378 | if ((ret = smsc47b397_find(&address))) |
1da177e4 LT |
379 | return ret; |
380 | ||
292fc1a5 JD |
381 | ret = platform_driver_register(&smsc47b397_driver); |
382 | if (ret) | |
383 | goto exit; | |
384 | ||
385 | /* Sets global pdev as a side effect */ | |
386 | ret = smsc47b397_device_add(address); | |
387 | if (ret) | |
388 | goto exit_driver; | |
389 | ||
390 | return 0; | |
391 | ||
392 | exit_driver: | |
393 | platform_driver_unregister(&smsc47b397_driver); | |
394 | exit: | |
395 | return ret; | |
1da177e4 LT |
396 | } |
397 | ||
398 | static void __exit smsc47b397_exit(void) | |
399 | { | |
292fc1a5 JD |
400 | platform_device_unregister(pdev); |
401 | platform_driver_unregister(&smsc47b397_driver); | |
1da177e4 LT |
402 | } |
403 | ||
404 | MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); | |
405 | MODULE_DESCRIPTION("SMSC LPC47B397 driver"); | |
406 | MODULE_LICENSE("GPL"); | |
407 | ||
408 | module_init(smsc47b397_init); | |
409 | module_exit(smsc47b397_exit); |