blob: 65c88ff5645ac6d63efb383536a0169e92635f7b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Joe Perchesbf1a85e2010-10-20 06:51:48 +000029#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/module.h>
32#include <linux/slab.h>
33#include <linux/ioport.h>
34#include <linux/jiffies.h>
Jean Delvare292fc1a2007-05-08 17:22:03 +020035#include <linux/platform_device.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040036#include <linux/hwmon.h>
Jean Delvare3659a012007-05-08 17:22:03 +020037#include <linux/hwmon-sysfs.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040038#include <linux/err.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/init.h>
Ingo Molnar9a61bf62006-01-18 23:19:26 +010040#include <linux/mutex.h>
Jean Delvareb9acb642009-01-07 16:37:35 +010041#include <linux/acpi.h>
H Hartley Sweeten6055fae2009-09-15 17:18:13 +020042#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Jean Delvare67b671b2007-12-06 23:13:42 +010044static unsigned short force_id;
45module_param(force_id, ushort, 0);
46MODULE_PARM_DESC(force_id, "Override the detected device ID");
47
Jean Delvare292fc1a2007-05-08 17:22:03 +020048static struct platform_device *pdev;
49
50#define DRVNAME "smsc47b397"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52/* Super-I/0 registers and commands */
53
54#define REG 0x2e /* The register to read/write */
55#define VAL 0x2f /* The value to read/write */
56
57static inline void superio_outb(int reg, int val)
58{
59 outb(reg, REG);
60 outb(val, VAL);
61}
62
63static inline int superio_inb(int reg)
64{
65 outb(reg, REG);
66 return inb(VAL);
67}
68
69/* select superio logical device */
70static inline void superio_select(int ld)
71{
72 superio_outb(0x07, ld);
73}
74
75static inline void superio_enter(void)
76{
77 outb(0x55, REG);
78}
79
80static inline void superio_exit(void)
81{
82 outb(0xAA, REG);
83}
84
85#define SUPERIO_REG_DEVID 0x20
86#define SUPERIO_REG_DEVREV 0x21
87#define SUPERIO_REG_BASE_MSB 0x60
88#define SUPERIO_REG_BASE_LSB 0x61
89#define SUPERIO_REG_LD8 0x08
90
91#define SMSC_EXTENT 0x02
92
93/* 0 <= nr <= 3 */
94static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80};
95#define SMSC47B397_REG_TEMP(nr) (smsc47b397_reg_temp[(nr)])
96
97/* 0 <= nr <= 3 */
98#define SMSC47B397_REG_FAN_LSB(nr) (0x28 + 2 * (nr))
99#define SMSC47B397_REG_FAN_MSB(nr) (0x29 + 2 * (nr))
100
101struct smsc47b397_data {
Jean Delvare292fc1a2007-05-08 17:22:03 +0200102 unsigned short addr;
103 const char *name;
Tony Jones1beeffe2007-08-20 13:46:20 -0700104 struct device *hwmon_dev;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100105 struct mutex lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100107 struct mutex update_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 unsigned long last_updated; /* in jiffies */
109 int valid;
110
111 /* register values */
112 u16 fan[4];
113 u8 temp[4];
114};
115
Jean Delvare371f2e02011-11-04 12:00:47 +0100116static int smsc47b397_read_value(struct smsc47b397_data *data, u8 reg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 int res;
119
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100120 mutex_lock(&data->lock);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200121 outb(reg, data->addr);
122 res = inb_p(data->addr + 1);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100123 mutex_unlock(&data->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 return res;
125}
126
127static struct smsc47b397_data *smsc47b397_update_device(struct device *dev)
128{
Jean Delvare292fc1a2007-05-08 17:22:03 +0200129 struct smsc47b397_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 int i;
131
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100132 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
134 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
Jean Delvare292fc1a2007-05-08 17:22:03 +0200135 dev_dbg(dev, "starting device update...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
137 /* 4 temperature inputs, 4 fan inputs */
138 for (i = 0; i < 4; i++) {
Jean Delvare292fc1a2007-05-08 17:22:03 +0200139 data->temp[i] = smsc47b397_read_value(data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 SMSC47B397_REG_TEMP(i));
141
142 /* must read LSB first */
Jean Delvare292fc1a2007-05-08 17:22:03 +0200143 data->fan[i] = smsc47b397_read_value(data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 SMSC47B397_REG_FAN_LSB(i));
Jean Delvare292fc1a2007-05-08 17:22:03 +0200145 data->fan[i] |= smsc47b397_read_value(data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 SMSC47B397_REG_FAN_MSB(i)) << 8;
147 }
148
149 data->last_updated = jiffies;
150 data->valid = 1;
151
Jean Delvare292fc1a2007-05-08 17:22:03 +0200152 dev_dbg(dev, "... device update complete\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 }
154
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100155 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
157 return data;
158}
159
160/* TEMP: 0.001C/bit (-128C to +127C)
161 REG: 1C/bit, two's complement */
162static int temp_from_reg(u8 reg)
163{
164 return (s8)reg * 1000;
165}
166
Jean Delvare3659a012007-05-08 17:22:03 +0200167static ssize_t show_temp(struct device *dev, struct device_attribute
168 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169{
Jean Delvare3659a012007-05-08 17:22:03 +0200170 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 struct smsc47b397_data *data = smsc47b397_update_device(dev);
Jean Delvare3659a012007-05-08 17:22:03 +0200172 return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173}
174
Jean Delvare3659a012007-05-08 17:22:03 +0200175static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
176static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
177static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
178static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180/* FAN: 1 RPM/bit
181 REG: count of 90kHz pulses / revolution */
182static int fan_from_reg(u16 reg)
183{
Jean Delvare90205c62007-06-23 14:58:22 +0200184 if (reg == 0 || reg == 0xffff)
185 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 return 90000 * 60 / reg;
187}
188
Jean Delvare3659a012007-05-08 17:22:03 +0200189static ssize_t show_fan(struct device *dev, struct device_attribute
190 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191{
Jean Delvare3659a012007-05-08 17:22:03 +0200192 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
193 struct smsc47b397_data *data = smsc47b397_update_device(dev);
194 return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195}
Jean Delvare3659a012007-05-08 17:22:03 +0200196static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
197static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
198static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
199static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
Jean Delvare292fc1a2007-05-08 17:22:03 +0200201static ssize_t show_name(struct device *dev, struct device_attribute
202 *devattr, char *buf)
203{
204 struct smsc47b397_data *data = dev_get_drvdata(dev);
205 return sprintf(buf, "%s\n", data->name);
206}
207static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
208
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200209static struct attribute *smsc47b397_attributes[] = {
Jean Delvare3659a012007-05-08 17:22:03 +0200210 &sensor_dev_attr_temp1_input.dev_attr.attr,
211 &sensor_dev_attr_temp2_input.dev_attr.attr,
212 &sensor_dev_attr_temp3_input.dev_attr.attr,
213 &sensor_dev_attr_temp4_input.dev_attr.attr,
214 &sensor_dev_attr_fan1_input.dev_attr.attr,
215 &sensor_dev_attr_fan2_input.dev_attr.attr,
216 &sensor_dev_attr_fan3_input.dev_attr.attr,
217 &sensor_dev_attr_fan4_input.dev_attr.attr,
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200218
Jean Delvare292fc1a2007-05-08 17:22:03 +0200219 &dev_attr_name.attr,
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200220 NULL
221};
222
223static const struct attribute_group smsc47b397_group = {
224 .attrs = smsc47b397_attributes,
225};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
Jean Delvare292fc1a2007-05-08 17:22:03 +0200227static int __devexit smsc47b397_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
Jean Delvare292fc1a2007-05-08 17:22:03 +0200229 struct smsc47b397_data *data = platform_get_drvdata(pdev);
230 struct resource *res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Tony Jones1beeffe2007-08-20 13:46:20 -0700232 hwmon_device_unregister(data->hwmon_dev);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200233 sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group);
234 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
235 release_region(res->start, SMSC_EXTENT);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400236 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
238 return 0;
239}
240
Jean Delvare292fc1a2007-05-08 17:22:03 +0200241static int smsc47b397_probe(struct platform_device *pdev);
Jean Delvare2d8672c2005-07-19 23:56:35 +0200242
Jean Delvare292fc1a2007-05-08 17:22:03 +0200243static struct platform_driver smsc47b397_driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100244 .driver = {
Jean Delvare87218842006-09-03 22:36:14 +0200245 .owner = THIS_MODULE,
Jean Delvare292fc1a2007-05-08 17:22:03 +0200246 .name = DRVNAME,
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100247 },
Jean Delvare292fc1a2007-05-08 17:22:03 +0200248 .probe = smsc47b397_probe,
249 .remove = __devexit_p(smsc47b397_remove),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250};
251
Jean Delvare292fc1a2007-05-08 17:22:03 +0200252static int __devinit smsc47b397_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253{
Jean Delvare292fc1a2007-05-08 17:22:03 +0200254 struct device *dev = &pdev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 struct smsc47b397_data *data;
Jean Delvare292fc1a2007-05-08 17:22:03 +0200256 struct resource *res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 int err = 0;
258
Jean Delvare292fc1a2007-05-08 17:22:03 +0200259 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
260 if (!request_region(res->start, SMSC_EXTENT,
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100261 smsc47b397_driver.driver.name)) {
Jean Delvare292fc1a2007-05-08 17:22:03 +0200262 dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
263 (unsigned long)res->start,
264 (unsigned long)res->start + SMSC_EXTENT - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 return -EBUSY;
266 }
267
Jean Delvare371f2e02011-11-04 12:00:47 +0100268 data = kzalloc(sizeof(struct smsc47b397_data), GFP_KERNEL);
269 if (!data) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 err = -ENOMEM;
271 goto error_release;
272 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
Jean Delvare292fc1a2007-05-08 17:22:03 +0200274 data->addr = res->start;
275 data->name = "smsc47b397";
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100276 mutex_init(&data->lock);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100277 mutex_init(&data->update_lock);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200278 platform_set_drvdata(pdev, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
Jean Delvare371f2e02011-11-04 12:00:47 +0100280 err = sysfs_create_group(&dev->kobj, &smsc47b397_group);
281 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 goto error_free;
283
Tony Jones1beeffe2007-08-20 13:46:20 -0700284 data->hwmon_dev = hwmon_device_register(dev);
285 if (IS_ERR(data->hwmon_dev)) {
286 err = PTR_ERR(data->hwmon_dev);
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200287 goto error_remove;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400288 }
289
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 return 0;
291
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200292error_remove:
Jean Delvare292fc1a2007-05-08 17:22:03 +0200293 sysfs_remove_group(&dev->kobj, &smsc47b397_group);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294error_free:
Alexey Dobriyan1f57ff82005-08-26 01:49:14 +0400295 kfree(data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296error_release:
Jean Delvare292fc1a2007-05-08 17:22:03 +0200297 release_region(res->start, SMSC_EXTENT);
298 return err;
299}
300
301static int __init smsc47b397_device_add(unsigned short address)
302{
303 struct resource res = {
304 .start = address,
305 .end = address + SMSC_EXTENT - 1,
306 .name = DRVNAME,
307 .flags = IORESOURCE_IO,
308 };
309 int err;
310
Jean Delvareb9acb642009-01-07 16:37:35 +0100311 err = acpi_check_resource_conflict(&res);
312 if (err)
313 goto exit;
314
Jean Delvare292fc1a2007-05-08 17:22:03 +0200315 pdev = platform_device_alloc(DRVNAME, address);
316 if (!pdev) {
317 err = -ENOMEM;
Joe Perchesbf1a85e2010-10-20 06:51:48 +0000318 pr_err("Device allocation failed\n");
Jean Delvare292fc1a2007-05-08 17:22:03 +0200319 goto exit;
320 }
321
322 err = platform_device_add_resources(pdev, &res, 1);
323 if (err) {
Joe Perchesbf1a85e2010-10-20 06:51:48 +0000324 pr_err("Device resource addition failed (%d)\n", err);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200325 goto exit_device_put;
326 }
327
328 err = platform_device_add(pdev);
329 if (err) {
Joe Perchesbf1a85e2010-10-20 06:51:48 +0000330 pr_err("Device addition failed (%d)\n", err);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200331 goto exit_device_put;
332 }
333
334 return 0;
335
336exit_device_put:
337 platform_device_put(pdev);
338exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 return err;
340}
341
Jean Delvare2d8672c2005-07-19 23:56:35 +0200342static int __init smsc47b397_find(unsigned short *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343{
344 u8 id, rev;
Craig Kelley80930772008-02-29 10:24:44 -0700345 char *name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
347 superio_enter();
Jean Delvare67b671b2007-12-06 23:13:42 +0100348 id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Jean Delvare371f2e02011-11-04 12:00:47 +0100350 switch (id) {
Craig Kelley80930772008-02-29 10:24:44 -0700351 case 0x81:
352 name = "SCH5307-NS";
353 break;
354 case 0x6f:
355 name = "LPC47B397-NC";
356 break;
357 case 0x85:
358 case 0x8c:
359 name = "SCH5317";
360 break;
361 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 superio_exit();
363 return -ENODEV;
364 }
365
366 rev = superio_inb(SUPERIO_REG_DEVREV);
367
368 superio_select(SUPERIO_REG_LD8);
369 *addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8)
370 | superio_inb(SUPERIO_REG_BASE_LSB);
371
Joe Perchesbf1a85e2010-10-20 06:51:48 +0000372 pr_info("found SMSC %s (base address 0x%04x, revision %u)\n",
Craig Kelley80930772008-02-29 10:24:44 -0700373 name, *addr, rev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375 superio_exit();
376 return 0;
377}
378
379static int __init smsc47b397_init(void)
380{
Jean Delvare292fc1a2007-05-08 17:22:03 +0200381 unsigned short address;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 int ret;
383
Jean Delvare371f2e02011-11-04 12:00:47 +0100384 ret = smsc47b397_find(&address);
385 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 return ret;
387
Jean Delvare292fc1a2007-05-08 17:22:03 +0200388 ret = platform_driver_register(&smsc47b397_driver);
389 if (ret)
390 goto exit;
391
392 /* Sets global pdev as a side effect */
393 ret = smsc47b397_device_add(address);
394 if (ret)
395 goto exit_driver;
396
397 return 0;
398
399exit_driver:
400 platform_driver_unregister(&smsc47b397_driver);
401exit:
402 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403}
404
405static void __exit smsc47b397_exit(void)
406{
Jean Delvare292fc1a2007-05-08 17:22:03 +0200407 platform_device_unregister(pdev);
408 platform_driver_unregister(&smsc47b397_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409}
410
411MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
412MODULE_DESCRIPTION("SMSC LPC47B397 driver");
413MODULE_LICENSE("GPL");
414
415module_init(smsc47b397_init);
416module_exit(smsc47b397_exit);