blob: 6bd2007565603efde3b012865fd7091fff5478e9 [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 Delvare7c81c60f2014-01-29 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;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100103 struct mutex lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100105 struct mutex update_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 unsigned long last_updated; /* in jiffies */
107 int valid;
108
109 /* register values */
110 u16 fan[4];
111 u8 temp[4];
112};
113
Jean Delvare371f2e02011-11-04 12:00:47 +0100114static int smsc47b397_read_value(struct smsc47b397_data *data, u8 reg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 int res;
117
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100118 mutex_lock(&data->lock);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200119 outb(reg, data->addr);
120 res = inb_p(data->addr + 1);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100121 mutex_unlock(&data->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 return res;
123}
124
125static struct smsc47b397_data *smsc47b397_update_device(struct device *dev)
126{
Jean Delvare292fc1a2007-05-08 17:22:03 +0200127 struct smsc47b397_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 int i;
129
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100130 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
132 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
Jean Delvare292fc1a2007-05-08 17:22:03 +0200133 dev_dbg(dev, "starting device update...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135 /* 4 temperature inputs, 4 fan inputs */
136 for (i = 0; i < 4; i++) {
Jean Delvare292fc1a2007-05-08 17:22:03 +0200137 data->temp[i] = smsc47b397_read_value(data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 SMSC47B397_REG_TEMP(i));
139
140 /* must read LSB first */
Jean Delvare292fc1a2007-05-08 17:22:03 +0200141 data->fan[i] = smsc47b397_read_value(data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 SMSC47B397_REG_FAN_LSB(i));
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_MSB(i)) << 8;
145 }
146
147 data->last_updated = jiffies;
148 data->valid = 1;
149
Jean Delvare292fc1a2007-05-08 17:22:03 +0200150 dev_dbg(dev, "... device update complete\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 }
152
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100153 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155 return data;
156}
157
Guenter Roeck2a52dd62012-01-19 11:02:25 -0800158/*
159 * TEMP: 0.001C/bit (-128C to +127C)
160 * REG: 1C/bit, two's complement
161 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162static 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
Guenter Roeck2a52dd62012-01-19 11:02:25 -0800180/*
181 * FAN: 1 RPM/bit
182 * REG: count of 90kHz pulses / revolution
183 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184static int fan_from_reg(u16 reg)
185{
Jean Delvare90205c62007-06-23 14:58:22 +0200186 if (reg == 0 || reg == 0xffff)
187 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 return 90000 * 60 / reg;
189}
190
Jean Delvare3659a012007-05-08 17:22:03 +0200191static ssize_t show_fan(struct device *dev, struct device_attribute
192 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193{
Jean Delvare3659a012007-05-08 17:22:03 +0200194 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
195 struct smsc47b397_data *data = smsc47b397_update_device(dev);
196 return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197}
Jean Delvare3659a012007-05-08 17:22:03 +0200198static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
199static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
200static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
201static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
Axel Lin9b993e32014-07-08 09:27:38 +0800203static struct attribute *smsc47b397_attrs[] = {
Jean Delvare3659a012007-05-08 17:22:03 +0200204 &sensor_dev_attr_temp1_input.dev_attr.attr,
205 &sensor_dev_attr_temp2_input.dev_attr.attr,
206 &sensor_dev_attr_temp3_input.dev_attr.attr,
207 &sensor_dev_attr_temp4_input.dev_attr.attr,
208 &sensor_dev_attr_fan1_input.dev_attr.attr,
209 &sensor_dev_attr_fan2_input.dev_attr.attr,
210 &sensor_dev_attr_fan3_input.dev_attr.attr,
211 &sensor_dev_attr_fan4_input.dev_attr.attr,
Mark M. Hoffmanc1685f62006-09-24 20:59:49 +0200212
213 NULL
214};
215
Axel Lin9b993e32014-07-08 09:27:38 +0800216ATTRIBUTE_GROUPS(smsc47b397);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217
Jean Delvare292fc1a2007-05-08 17:22:03 +0200218static int smsc47b397_probe(struct platform_device *pdev);
Jean Delvare2d8672c2005-07-19 23:56:35 +0200219
Jean Delvare292fc1a2007-05-08 17:22:03 +0200220static struct platform_driver smsc47b397_driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100221 .driver = {
Jean Delvare292fc1a2007-05-08 17:22:03 +0200222 .name = DRVNAME,
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100223 },
Jean Delvare292fc1a2007-05-08 17:22:03 +0200224 .probe = smsc47b397_probe,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225};
226
Bill Pemberton6c931ae2012-11-19 13:22:35 -0500227static int smsc47b397_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
Jean Delvare292fc1a2007-05-08 17:22:03 +0200229 struct device *dev = &pdev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 struct smsc47b397_data *data;
Axel Lin9b993e32014-07-08 09:27:38 +0800231 struct device *hwmon_dev;
Jean Delvare292fc1a2007-05-08 17:22:03 +0200232 struct resource *res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Jean Delvare292fc1a2007-05-08 17:22:03 +0200234 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
Guenter Roecke43d5fe2012-06-02 12:04:06 -0700235 if (!devm_request_region(dev, res->start, SMSC_EXTENT,
236 smsc47b397_driver.driver.name)) {
Jean Delvare292fc1a2007-05-08 17:22:03 +0200237 dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
238 (unsigned long)res->start,
239 (unsigned long)res->start + SMSC_EXTENT - 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 return -EBUSY;
241 }
242
Guenter Roecke43d5fe2012-06-02 12:04:06 -0700243 data = devm_kzalloc(dev, sizeof(struct smsc47b397_data), GFP_KERNEL);
244 if (!data)
245 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Jean Delvare292fc1a2007-05-08 17:22:03 +0200247 data->addr = res->start;
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100248 mutex_init(&data->lock);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100249 mutex_init(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Axel Lin9b993e32014-07-08 09:27:38 +0800251 hwmon_dev = devm_hwmon_device_register_with_groups(dev, "smsc47b397",
252 data,
253 smsc47b397_groups);
254 return PTR_ERR_OR_ZERO(hwmon_dev);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200255}
256
257static int __init smsc47b397_device_add(unsigned short address)
258{
259 struct resource res = {
260 .start = address,
261 .end = address + SMSC_EXTENT - 1,
262 .name = DRVNAME,
263 .flags = IORESOURCE_IO,
264 };
265 int err;
266
Jean Delvareb9acb642009-01-07 16:37:35 +0100267 err = acpi_check_resource_conflict(&res);
268 if (err)
269 goto exit;
270
Jean Delvare292fc1a2007-05-08 17:22:03 +0200271 pdev = platform_device_alloc(DRVNAME, address);
272 if (!pdev) {
273 err = -ENOMEM;
Joe Perchesbf1a85e2010-10-20 06:51:48 +0000274 pr_err("Device allocation failed\n");
Jean Delvare292fc1a2007-05-08 17:22:03 +0200275 goto exit;
276 }
277
278 err = platform_device_add_resources(pdev, &res, 1);
279 if (err) {
Joe Perchesbf1a85e2010-10-20 06:51:48 +0000280 pr_err("Device resource addition failed (%d)\n", err);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200281 goto exit_device_put;
282 }
283
284 err = platform_device_add(pdev);
285 if (err) {
Joe Perchesbf1a85e2010-10-20 06:51:48 +0000286 pr_err("Device addition failed (%d)\n", err);
Jean Delvare292fc1a2007-05-08 17:22:03 +0200287 goto exit_device_put;
288 }
289
290 return 0;
291
292exit_device_put:
293 platform_device_put(pdev);
294exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 return err;
296}
297
Guenter Roeck8528e072012-03-28 08:35:26 -0700298static int __init smsc47b397_find(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299{
300 u8 id, rev;
Craig Kelley80930772008-02-29 10:24:44 -0700301 char *name;
Guenter Roeck8528e072012-03-28 08:35:26 -0700302 unsigned short addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
304 superio_enter();
Jean Delvare67b671b2007-12-06 23:13:42 +0100305 id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306
Jean Delvare371f2e02011-11-04 12:00:47 +0100307 switch (id) {
Craig Kelley80930772008-02-29 10:24:44 -0700308 case 0x81:
309 name = "SCH5307-NS";
310 break;
311 case 0x6f:
312 name = "LPC47B397-NC";
313 break;
314 case 0x85:
315 case 0x8c:
316 name = "SCH5317";
317 break;
318 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 superio_exit();
320 return -ENODEV;
321 }
322
323 rev = superio_inb(SUPERIO_REG_DEVREV);
324
325 superio_select(SUPERIO_REG_LD8);
Guenter Roeck8528e072012-03-28 08:35:26 -0700326 addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 | superio_inb(SUPERIO_REG_BASE_LSB);
328
Joe Perchesbf1a85e2010-10-20 06:51:48 +0000329 pr_info("found SMSC %s (base address 0x%04x, revision %u)\n",
Guenter Roeck8528e072012-03-28 08:35:26 -0700330 name, addr, rev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
332 superio_exit();
Guenter Roeck8528e072012-03-28 08:35:26 -0700333 return addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334}
335
336static int __init smsc47b397_init(void)
337{
Jean Delvare292fc1a2007-05-08 17:22:03 +0200338 unsigned short address;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 int ret;
340
Guenter Roeck8528e072012-03-28 08:35:26 -0700341 ret = smsc47b397_find();
342 if (ret < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 return ret;
Guenter Roeck8528e072012-03-28 08:35:26 -0700344 address = ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
Jean Delvare292fc1a2007-05-08 17:22:03 +0200346 ret = platform_driver_register(&smsc47b397_driver);
347 if (ret)
348 goto exit;
349
350 /* Sets global pdev as a side effect */
351 ret = smsc47b397_device_add(address);
352 if (ret)
353 goto exit_driver;
354
355 return 0;
356
357exit_driver:
358 platform_driver_unregister(&smsc47b397_driver);
359exit:
360 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361}
362
363static void __exit smsc47b397_exit(void)
364{
Jean Delvare292fc1a2007-05-08 17:22:03 +0200365 platform_device_unregister(pdev);
366 platform_driver_unregister(&smsc47b397_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367}
368
369MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
370MODULE_DESCRIPTION("SMSC LPC47B397 driver");
371MODULE_LICENSE("GPL");
372
373module_init(smsc47b397_init);
374module_exit(smsc47b397_exit);