blob: bd89e87bd6ae3297b655609e92f6e1f62c98afbf [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Guenter Roeck2a52dd62012-01-19 11:02:25 -08002 * 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>
Jean Delvare7c81c602014-01-29 20:40:08 +010012 * Copyright (C) 2004 Jean Delvare <jdelvare@suse.de>
Guenter Roeck2a52dd62012-01-19 11:02:25 -080013 *
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
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
Guenter Roeck2a52dd62012-01-19 11:02:25 -0800160/*
161 * TEMP: 0.001C/bit (-128C to +127C)
162 * REG: 1C/bit, two's complement
163 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164static int temp_from_reg(u8 reg)
165{
166 return (s8)reg * 1000;
167}
168
Jean Delvare3659a012007-05-08 17:22:03 +0200169static ssize_t show_temp(struct device *dev, struct device_attribute
170 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171{
Jean Delvare3659a012007-05-08 17:22:03 +0200172 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 struct smsc47b397_data *data = smsc47b397_update_device(dev);
Jean Delvare3659a012007-05-08 17:22:03 +0200174 return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175}
176
Jean Delvare3659a012007-05-08 17:22:03 +0200177static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
178static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
179static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
180static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Guenter Roeck2a52dd62012-01-19 11:02:25 -0800182/*
183 * FAN: 1 RPM/bit
184 * REG: count of 90kHz pulses / revolution
185 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186static int fan_from_reg(u16 reg)
187{
Jean Delvare90205c62007-06-23 14:58:22 +0200188 if (reg == 0 || reg == 0xffff)
189 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 return 90000 * 60 / reg;
191}
192
Jean Delvare3659a012007-05-08 17:22:03 +0200193static ssize_t show_fan(struct device *dev, struct device_attribute
194 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195{
Jean Delvare3659a012007-05-08 17:22:03 +0200196 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
197 struct smsc47b397_data *data = smsc47b397_update_device(dev);
198 return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199}
Jean Delvare3659a012007-05-08 17:22:03 +0200200static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
201static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
202static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
203static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
Jean Delvare292fc1a2007-05-08 17:22:03 +0200205static ssize_t show_name(struct device *dev, struct device_attribute
206 *devattr, char *buf)
207{
208 struct smsc47b397_data *data = dev_get_drvdata(dev);
209 return sprintf(buf, "%s\n", data->name);
210}
211static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
212
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200213static struct attribute *smsc47b397_attributes[] = {
Jean Delvare3659a012007-05-08 17:22:03 +0200214 &sensor_dev_attr_temp1_input.dev_attr.attr,
215 &sensor_dev_attr_temp2_input.dev_attr.attr,
216 &sensor_dev_attr_temp3_input.dev_attr.attr,
217 &sensor_dev_attr_temp4_input.dev_attr.attr,
218 &sensor_dev_attr_fan1_input.dev_attr.attr,
219 &sensor_dev_attr_fan2_input.dev_attr.attr,
220 &sensor_dev_attr_fan3_input.dev_attr.attr,
221 &sensor_dev_attr_fan4_input.dev_attr.attr,
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200222
Jean Delvare292fc1a2007-05-08 17:22:03 +0200223 &dev_attr_name.attr,
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200224 NULL
225};
226
227static const struct attribute_group smsc47b397_group = {
228 .attrs = smsc47b397_attributes,
229};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Bill Pemberton281dfd02012-11-19 13:25:51 -0500231static int smsc47b397_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232{
Jean Delvare292fc1a2007-05-08 17:22:03 +0200233 struct smsc47b397_data *data = platform_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Tony Jones1beeffe2007-08-20 13:46:20 -0700235 hwmon_device_unregister(data->hwmon_dev);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200236 sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group);
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,
Bill Pemberton9e5e9b72012-11-19 13:21:20 -0500249 .remove = smsc47b397_remove,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250};
251
Bill Pemberton6c931ae2012-11-19 13:22:35 -0500252static int 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);
Guenter Roecke43d5fe2012-06-02 12:04:06 -0700260 if (!devm_request_region(dev, res->start, SMSC_EXTENT,
261 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
Guenter Roecke43d5fe2012-06-02 12:04:06 -0700268 data = devm_kzalloc(dev, sizeof(struct smsc47b397_data), GFP_KERNEL);
269 if (!data)
270 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
Jean Delvare292fc1a2007-05-08 17:22:03 +0200272 data->addr = res->start;
273 data->name = "smsc47b397";
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100274 mutex_init(&data->lock);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100275 mutex_init(&data->update_lock);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200276 platform_set_drvdata(pdev, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Jean Delvare371f2e02011-11-04 12:00:47 +0100278 err = sysfs_create_group(&dev->kobj, &smsc47b397_group);
279 if (err)
Guenter Roecke43d5fe2012-06-02 12:04:06 -0700280 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
Tony Jones1beeffe2007-08-20 13:46:20 -0700282 data->hwmon_dev = hwmon_device_register(dev);
283 if (IS_ERR(data->hwmon_dev)) {
284 err = PTR_ERR(data->hwmon_dev);
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200285 goto error_remove;
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400286 }
287
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 return 0;
289
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200290error_remove:
Jean Delvare292fc1a2007-05-08 17:22:03 +0200291 sysfs_remove_group(&dev->kobj, &smsc47b397_group);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200292 return err;
293}
294
295static int __init smsc47b397_device_add(unsigned short address)
296{
297 struct resource res = {
298 .start = address,
299 .end = address + SMSC_EXTENT - 1,
300 .name = DRVNAME,
301 .flags = IORESOURCE_IO,
302 };
303 int err;
304
Jean Delvareb9acb642009-01-07 16:37:35 +0100305 err = acpi_check_resource_conflict(&res);
306 if (err)
307 goto exit;
308
Jean Delvare292fc1a2007-05-08 17:22:03 +0200309 pdev = platform_device_alloc(DRVNAME, address);
310 if (!pdev) {
311 err = -ENOMEM;
Joe Perchesbf1a85e2010-10-20 06:51:48 +0000312 pr_err("Device allocation failed\n");
Jean Delvare292fc1a2007-05-08 17:22:03 +0200313 goto exit;
314 }
315
316 err = platform_device_add_resources(pdev, &res, 1);
317 if (err) {
Joe Perchesbf1a85e2010-10-20 06:51:48 +0000318 pr_err("Device resource addition failed (%d)\n", err);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200319 goto exit_device_put;
320 }
321
322 err = platform_device_add(pdev);
323 if (err) {
Joe Perchesbf1a85e2010-10-20 06:51:48 +0000324 pr_err("Device addition failed (%d)\n", err);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200325 goto exit_device_put;
326 }
327
328 return 0;
329
330exit_device_put:
331 platform_device_put(pdev);
332exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 return err;
334}
335
Guenter Roeck8528e072012-03-28 08:35:26 -0700336static int __init smsc47b397_find(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337{
338 u8 id, rev;
Craig Kelley80930772008-02-29 10:24:44 -0700339 char *name;
Guenter Roeck8528e072012-03-28 08:35:26 -0700340 unsigned short addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
342 superio_enter();
Jean Delvare67b671b2007-12-06 23:13:42 +0100343 id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Jean Delvare371f2e02011-11-04 12:00:47 +0100345 switch (id) {
Craig Kelley80930772008-02-29 10:24:44 -0700346 case 0x81:
347 name = "SCH5307-NS";
348 break;
349 case 0x6f:
350 name = "LPC47B397-NC";
351 break;
352 case 0x85:
353 case 0x8c:
354 name = "SCH5317";
355 break;
356 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 superio_exit();
358 return -ENODEV;
359 }
360
361 rev = superio_inb(SUPERIO_REG_DEVREV);
362
363 superio_select(SUPERIO_REG_LD8);
Guenter Roeck8528e072012-03-28 08:35:26 -0700364 addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 | superio_inb(SUPERIO_REG_BASE_LSB);
366
Joe Perchesbf1a85e2010-10-20 06:51:48 +0000367 pr_info("found SMSC %s (base address 0x%04x, revision %u)\n",
Guenter Roeck8528e072012-03-28 08:35:26 -0700368 name, addr, rev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
370 superio_exit();
Guenter Roeck8528e072012-03-28 08:35:26 -0700371 return addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372}
373
374static int __init smsc47b397_init(void)
375{
Jean Delvare292fc1a2007-05-08 17:22:03 +0200376 unsigned short address;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 int ret;
378
Guenter Roeck8528e072012-03-28 08:35:26 -0700379 ret = smsc47b397_find();
380 if (ret < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 return ret;
Guenter Roeck8528e072012-03-28 08:35:26 -0700382 address = ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
Jean Delvare292fc1a2007-05-08 17:22:03 +0200384 ret = platform_driver_register(&smsc47b397_driver);
385 if (ret)
386 goto exit;
387
388 /* Sets global pdev as a side effect */
389 ret = smsc47b397_device_add(address);
390 if (ret)
391 goto exit_driver;
392
393 return 0;
394
395exit_driver:
396 platform_driver_unregister(&smsc47b397_driver);
397exit:
398 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399}
400
401static void __exit smsc47b397_exit(void)
402{
Jean Delvare292fc1a2007-05-08 17:22:03 +0200403 platform_device_unregister(pdev);
404 platform_driver_unregister(&smsc47b397_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405}
406
407MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
408MODULE_DESCRIPTION("SMSC LPC47B397 driver");
409MODULE_LICENSE("GPL");
410
411module_init(smsc47b397_init);
412module_exit(smsc47b397_exit);