blob: 6d8255ccf07afb1a9d31955f82e91392a824a4ba [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Guenter Roeck85a0c0d2012-01-14 22:27:00 -08002 * smsc47m1.c - Part of lm_sensors, Linux kernel modules
3 * for hardware monitoring
4 *
5 * Supports the SMSC LPC47B27x, LPC47M10x, LPC47M112, LPC47M13x,
6 * LPC47M14x, LPC47M15x, LPC47M192, LPC47M292 and LPC47M997
7 * Super-I/O chips.
8 *
9 * Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
10 * Copyright (C) 2004-2007 Jean Delvare <khali@linux-fr.org>
11 * Ported to Linux 2.6 by Gabriele Gorla <gorlik@yahoo.com>
12 * and Jean Delvare
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
Joe Perches512504e2010-10-20 06:51:49 +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 Delvare51f2cca2007-05-08 17:22:00 +020035#include <linux/platform_device.h>
Mark M. Hoffman943b0832005-07-15 21:39:18 -040036#include <linux/hwmon.h>
Jean Delvaree84cfbc2007-05-08 17:22:00 +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 Delvarece8c6ce12006-09-24 21:25:12 +020041#include <linux/sysfs.h>
Jean Delvareb9acb642009-01-07 16:37:35 +010042#include <linux/acpi.h>
H Hartley Sweeten6055fae2009-09-15 17:18:13 +020043#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Jean Delvare67b671b2007-12-06 23:13:42 +010045static unsigned short force_id;
46module_param(force_id, ushort, 0);
47MODULE_PARM_DESC(force_id, "Override the detected device ID");
48
Jean Delvare51f2cca2007-05-08 17:22:00 +020049static struct platform_device *pdev;
50
51#define DRVNAME "smsc47m1"
Jean Delvare8eccbb62007-05-08 17:21:59 +020052enum chips { smsc47m1, smsc47m2 };
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54/* Super-I/0 registers and commands */
55
Guenter Roeck85a0c0d2012-01-14 22:27:00 -080056#define REG 0x2e /* The register to read/write */
57#define VAL 0x2f /* The value to read/write */
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
59static inline void
60superio_outb(int reg, int val)
61{
62 outb(reg, REG);
63 outb(val, VAL);
64}
65
66static inline int
67superio_inb(int reg)
68{
69 outb(reg, REG);
70 return inb(VAL);
71}
72
73/* logical device for fans is 0x0A */
74#define superio_select() superio_outb(0x07, 0x0A)
75
76static inline void
77superio_enter(void)
78{
79 outb(0x55, REG);
80}
81
82static inline void
83superio_exit(void)
84{
85 outb(0xAA, REG);
86}
87
88#define SUPERIO_REG_ACT 0x30
89#define SUPERIO_REG_BASE 0x60
90#define SUPERIO_REG_DEVID 0x20
Jean Delvare1b54ab42009-07-28 16:31:39 +020091#define SUPERIO_REG_DEVREV 0x21
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
93/* Logical device registers */
94
95#define SMSC_EXTENT 0x80
96
97/* nr is 0 or 1 in the macros below */
98#define SMSC47M1_REG_ALARM 0x04
99#define SMSC47M1_REG_TPIN(nr) (0x34 - (nr))
100#define SMSC47M1_REG_PPIN(nr) (0x36 - (nr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101#define SMSC47M1_REG_FANDIV 0x58
Jean Delvare8eccbb62007-05-08 17:21:59 +0200102
103static const u8 SMSC47M1_REG_FAN[3] = { 0x59, 0x5a, 0x6b };
104static const u8 SMSC47M1_REG_FAN_PRELOAD[3] = { 0x5b, 0x5c, 0x6c };
105static const u8 SMSC47M1_REG_PWM[3] = { 0x56, 0x57, 0x69 };
106
107#define SMSC47M2_REG_ALARM6 0x09
108#define SMSC47M2_REG_TPIN1 0x38
109#define SMSC47M2_REG_TPIN2 0x37
110#define SMSC47M2_REG_TPIN3 0x2d
111#define SMSC47M2_REG_PPIN3 0x2c
112#define SMSC47M2_REG_FANDIV3 0x6a
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800114#define MIN_FROM_REG(reg, div) ((reg) >= 192 ? 0 : \
115 983040 / ((192 - (reg)) * (div)))
116#define FAN_FROM_REG(reg, div, preload) ((reg) <= (preload) || (reg) == 255 ? \
117 0 : \
118 983040 / (((reg) - (preload)) * (div)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119#define DIV_FROM_REG(reg) (1 << (reg))
120#define PWM_FROM_REG(reg) (((reg) & 0x7E) << 1)
121#define PWM_EN_FROM_REG(reg) ((~(reg)) & 0x01)
122#define PWM_TO_REG(reg) (((reg) >> 1) & 0x7E)
123
124struct smsc47m1_data {
Jean Delvare51f2cca2007-05-08 17:22:00 +0200125 unsigned short addr;
126 const char *name;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200127 enum chips type;
Tony Jones1beeffe2007-08-20 13:46:20 -0700128 struct device *hwmon_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100130 struct mutex update_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 unsigned long last_updated; /* In jiffies */
132
Jean Delvare8eccbb62007-05-08 17:21:59 +0200133 u8 fan[3]; /* Register value */
134 u8 fan_preload[3]; /* Register value */
135 u8 fan_div[3]; /* Register encoding, shifted right */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 u8 alarms; /* Register encoding */
Jean Delvare8eccbb62007-05-08 17:21:59 +0200137 u8 pwm[3]; /* Register value (bit 0 is disable) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138};
139
Jean Delvare51f2cca2007-05-08 17:22:00 +0200140struct smsc47m1_sio_data {
141 enum chips type;
Jean Delvarefa0bff02009-12-16 21:38:27 +0100142 u8 activate; /* Remember initial device state */
Jean Delvare51f2cca2007-05-08 17:22:00 +0200143};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
Jean Delvare51f2cca2007-05-08 17:22:00 +0200145
Jean Delvare3ecf44b2009-12-16 21:38:26 +0100146static int __exit smsc47m1_remove(struct platform_device *pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147static struct smsc47m1_data *smsc47m1_update_device(struct device *dev,
148 int init);
149
Jean Delvare51f2cca2007-05-08 17:22:00 +0200150static inline int smsc47m1_read_value(struct smsc47m1_data *data, u8 reg)
Jean Delvare94e183f2007-05-08 17:21:59 +0200151{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200152 return inb_p(data->addr + reg);
Jean Delvare94e183f2007-05-08 17:21:59 +0200153}
154
Jean Delvare51f2cca2007-05-08 17:22:00 +0200155static inline void smsc47m1_write_value(struct smsc47m1_data *data, u8 reg,
Jean Delvare94e183f2007-05-08 17:21:59 +0200156 u8 value)
157{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200158 outb_p(value, data->addr + reg);
Jean Delvare94e183f2007-05-08 17:21:59 +0200159}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Jean Delvare51f2cca2007-05-08 17:22:00 +0200161static struct platform_driver smsc47m1_driver = {
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100162 .driver = {
Jean Delvare87218842006-09-03 22:36:14 +0200163 .owner = THIS_MODULE,
Jean Delvare51f2cca2007-05-08 17:22:00 +0200164 .name = DRVNAME,
Laurent Riffardcdaf7932005-11-26 20:37:41 +0100165 },
Jean Delvare3ecf44b2009-12-16 21:38:26 +0100166 .remove = __exit_p(smsc47m1_remove),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167};
168
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200169static ssize_t get_fan(struct device *dev, struct device_attribute
170 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200172 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200174 int nr = attr->index;
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800175 /*
176 * This chip (stupidly) stops monitoring fan speed if PWM is
177 * enabled and duty cycle is 0%. This is fine if the monitoring
178 * and control concern the same fan, but troublesome if they are
179 * not (which could as well happen).
180 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 :
182 FAN_FROM_REG(data->fan[nr],
183 DIV_FROM_REG(data->fan_div[nr]),
184 data->fan_preload[nr]);
185 return sprintf(buf, "%d\n", rpm);
186}
187
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200188static ssize_t get_fan_min(struct device *dev, struct device_attribute
189 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200191 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200193 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 int rpm = MIN_FROM_REG(data->fan_preload[nr],
195 DIV_FROM_REG(data->fan_div[nr]));
196 return sprintf(buf, "%d\n", rpm);
197}
198
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200199static ssize_t get_fan_div(struct device *dev, struct device_attribute
200 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200202 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200204 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205}
206
Jean Delvare1f08af72008-01-06 15:36:13 +0100207static ssize_t get_fan_alarm(struct device *dev, struct device_attribute
208 *devattr, char *buf)
209{
210 int bitnr = to_sensor_dev_attr(devattr)->index;
211 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
212 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
213}
214
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200215static ssize_t get_pwm(struct device *dev, struct device_attribute
216 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200218 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200220 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221}
222
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200223static ssize_t get_pwm_en(struct device *dev, struct device_attribute
224 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200226 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200228 return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229}
230
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200231static ssize_t get_alarms(struct device *dev, struct device_attribute
232 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233{
234 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
235 return sprintf(buf, "%d\n", data->alarms);
236}
237
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200238static ssize_t set_fan_min(struct device *dev, struct device_attribute
239 *devattr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200241 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200242 struct smsc47m1_data *data = dev_get_drvdata(dev);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200243 int nr = attr->index;
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800244 long rpmdiv;
245 long val;
246 int err;
247
248 err = kstrtol(buf, 10, &val);
249 if (err)
250 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100252 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]);
254
255 if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) {
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100256 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 return -EINVAL;
258 }
259
260 data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200261 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 data->fan_preload[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100263 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
265 return count;
266}
267
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800268/*
269 * Note: we save and restore the fan minimum here, because its value is
270 * determined in part by the fan clock divider. This follows the principle
271 * of least surprise; the user doesn't expect the fan minimum to change just
272 * because the divider changed.
273 */
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200274static ssize_t set_fan_div(struct device *dev, struct device_attribute
275 *devattr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200277 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200278 struct smsc47m1_data *data = dev_get_drvdata(dev);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200279 int nr = attr->index;
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800280 long new_div;
281 int err;
282 long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 u8 old_div = DIV_FROM_REG(data->fan_div[nr]);
284
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800285 err = kstrtol(buf, 10, &new_div);
286 if (err)
287 return err;
288
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 if (new_div == old_div) /* No change */
290 return count;
291
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100292 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 switch (new_div) {
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800294 case 1:
295 data->fan_div[nr] = 0;
296 break;
297 case 2:
298 data->fan_div[nr] = 1;
299 break;
300 case 4:
301 data->fan_div[nr] = 2;
302 break;
303 case 8:
304 data->fan_div[nr] = 3;
305 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 default:
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100307 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 return -EINVAL;
309 }
310
Jean Delvare8eccbb62007-05-08 17:21:59 +0200311 switch (nr) {
312 case 0:
313 case 1:
Jean Delvare51f2cca2007-05-08 17:22:00 +0200314 tmp = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200315 & ~(0x03 << (4 + 2 * nr));
316 tmp |= data->fan_div[nr] << (4 + 2 * nr);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200317 smsc47m1_write_value(data, SMSC47M1_REG_FANDIV, tmp);
Jean Delvare8eccbb62007-05-08 17:21:59 +0200318 break;
319 case 2:
Jean Delvare51f2cca2007-05-08 17:22:00 +0200320 tmp = smsc47m1_read_value(data, SMSC47M2_REG_FANDIV3) & 0xCF;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200321 tmp |= data->fan_div[2] << 4;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200322 smsc47m1_write_value(data, SMSC47M2_REG_FANDIV3, tmp);
Jean Delvare8eccbb62007-05-08 17:21:59 +0200323 break;
324 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
326 /* Preserve fan min */
327 tmp = 192 - (old_div * (192 - data->fan_preload[nr])
328 + new_div / 2) / new_div;
Guenter Roeck2a844c12013-01-09 08:09:34 -0800329 data->fan_preload[nr] = clamp_val(tmp, 0, 191);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200330 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 data->fan_preload[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100332 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
334 return count;
335}
336
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200337static ssize_t set_pwm(struct device *dev, struct device_attribute
338 *devattr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200340 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200341 struct smsc47m1_data *data = dev_get_drvdata(dev);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200342 int nr = attr->index;
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800343 long val;
344 int err;
345
346 err = kstrtol(buf, 10, &val);
347 if (err)
348 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
350 if (val < 0 || val > 255)
351 return -EINVAL;
352
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100353 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 data->pwm[nr] &= 0x81; /* Preserve additional bits */
355 data->pwm[nr] |= PWM_TO_REG(val);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200356 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 data->pwm[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100358 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360 return count;
361}
362
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200363static ssize_t set_pwm_en(struct device *dev, struct device_attribute
364 *devattr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200366 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200367 struct smsc47m1_data *data = dev_get_drvdata(dev);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200368 int nr = attr->index;
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800369 unsigned long val;
370 int err;
371
372 err = kstrtoul(buf, 10, &val);
373 if (err)
374 return err;
375
376 if (val > 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 return -EINVAL;
378
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100379 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 data->pwm[nr] &= 0xFE; /* preserve the other bits */
381 data->pwm[nr] |= !val;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200382 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 data->pwm[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100384 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386 return count;
387}
388
389#define fan_present(offset) \
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200390static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, get_fan, \
391 NULL, offset - 1); \
392static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
393 get_fan_min, set_fan_min, offset - 1); \
394static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
395 get_fan_div, set_fan_div, offset - 1); \
Jean Delvare1f08af72008-01-06 15:36:13 +0100396static SENSOR_DEVICE_ATTR(fan##offset##_alarm, S_IRUGO, get_fan_alarm, \
397 NULL, offset - 1); \
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200398static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
399 get_pwm, set_pwm, offset - 1); \
400static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
401 get_pwm_en, set_pwm_en, offset - 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
403fan_present(1);
404fan_present(2);
Jean Delvare8eccbb62007-05-08 17:21:59 +0200405fan_present(3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
407static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
408
Jean Delvare51f2cca2007-05-08 17:22:00 +0200409static ssize_t show_name(struct device *dev, struct device_attribute
410 *devattr, char *buf)
411{
412 struct smsc47m1_data *data = dev_get_drvdata(dev);
413
414 return sprintf(buf, "%s\n", data->name);
415}
416static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
417
Guenter Roeck7e612682012-01-16 17:15:02 -0800418static struct attribute *smsc47m1_attributes_fan1[] = {
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200419 &sensor_dev_attr_fan1_input.dev_attr.attr,
420 &sensor_dev_attr_fan1_min.dev_attr.attr,
421 &sensor_dev_attr_fan1_div.dev_attr.attr,
Jean Delvare1f08af72008-01-06 15:36:13 +0100422 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
Guenter Roeck7e612682012-01-16 17:15:02 -0800423 NULL
424};
425
426static const struct attribute_group smsc47m1_group_fan1 = {
427 .attrs = smsc47m1_attributes_fan1,
428};
429
430static struct attribute *smsc47m1_attributes_fan2[] = {
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200431 &sensor_dev_attr_fan2_input.dev_attr.attr,
432 &sensor_dev_attr_fan2_min.dev_attr.attr,
433 &sensor_dev_attr_fan2_div.dev_attr.attr,
Jean Delvare1f08af72008-01-06 15:36:13 +0100434 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
Guenter Roeck7e612682012-01-16 17:15:02 -0800435 NULL
436};
437
438static const struct attribute_group smsc47m1_group_fan2 = {
439 .attrs = smsc47m1_attributes_fan2,
440};
441
442static struct attribute *smsc47m1_attributes_fan3[] = {
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200443 &sensor_dev_attr_fan3_input.dev_attr.attr,
444 &sensor_dev_attr_fan3_min.dev_attr.attr,
445 &sensor_dev_attr_fan3_div.dev_attr.attr,
Jean Delvare1f08af72008-01-06 15:36:13 +0100446 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
Guenter Roeck7e612682012-01-16 17:15:02 -0800447 NULL
448};
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200449
Guenter Roeck7e612682012-01-16 17:15:02 -0800450static const struct attribute_group smsc47m1_group_fan3 = {
451 .attrs = smsc47m1_attributes_fan3,
452};
453
454static struct attribute *smsc47m1_attributes_pwm1[] = {
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200455 &sensor_dev_attr_pwm1.dev_attr.attr,
456 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
Guenter Roeck7e612682012-01-16 17:15:02 -0800457 NULL
458};
459
460static const struct attribute_group smsc47m1_group_pwm1 = {
461 .attrs = smsc47m1_attributes_pwm1,
462};
463
464static struct attribute *smsc47m1_attributes_pwm2[] = {
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200465 &sensor_dev_attr_pwm2.dev_attr.attr,
466 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
Guenter Roeck7e612682012-01-16 17:15:02 -0800467 NULL
468};
469
470static const struct attribute_group smsc47m1_group_pwm2 = {
471 .attrs = smsc47m1_attributes_pwm2,
472};
473
474static struct attribute *smsc47m1_attributes_pwm3[] = {
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200475 &sensor_dev_attr_pwm3.dev_attr.attr,
476 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
Guenter Roeck7e612682012-01-16 17:15:02 -0800477 NULL
478};
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200479
Guenter Roeck7e612682012-01-16 17:15:02 -0800480static const struct attribute_group smsc47m1_group_pwm3 = {
481 .attrs = smsc47m1_attributes_pwm3,
482};
483
484static struct attribute *smsc47m1_attributes[] = {
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200485 &dev_attr_alarms.attr,
Jean Delvare51f2cca2007-05-08 17:22:00 +0200486 &dev_attr_name.attr,
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200487 NULL
488};
489
490static const struct attribute_group smsc47m1_group = {
491 .attrs = smsc47m1_attributes,
492};
493
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700494static int __init smsc47m1_find(struct smsc47m1_sio_data *sio_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495{
496 u8 val;
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700497 unsigned short addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
499 superio_enter();
Jean Delvare67b671b2007-12-06 23:13:42 +0100500 val = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501
502 /*
Jean Delvare60917802006-10-08 22:00:44 +0200503 * SMSC LPC47M10x/LPC47M112/LPC47M13x (device id 0x59), LPC47M14x
504 * (device id 0x5F) and LPC47B27x (device id 0x51) have fan control.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 * The LPC47M15x and LPC47M192 chips "with hardware monitoring block"
Jean Delvareec5ce552005-04-26 22:09:43 +0200506 * can do much more besides (device id 0x60).
Jean Delvareb890a072005-10-26 22:21:24 +0200507 * The LPC47M997 is undocumented, but seems to be compatible with
508 * the LPC47M192, and has the same device id.
Jean Delvare8eccbb62007-05-08 17:21:59 +0200509 * The LPC47M292 (device id 0x6B) is somewhat compatible, but it
510 * supports a 3rd fan, and the pin configuration registers are
511 * unfortunately different.
Jean Delvare1b54ab42009-07-28 16:31:39 +0200512 * The LPC47M233 has the same device id (0x6B) but is not compatible.
513 * We check the high bit of the device revision register to
514 * differentiate them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 */
Jean Delvare51f2cca2007-05-08 17:22:00 +0200516 switch (val) {
Jean Delvare8eccbb62007-05-08 17:21:59 +0200517 case 0x51:
Joe Perches512504e2010-10-20 06:51:49 +0000518 pr_info("Found SMSC LPC47B27x\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200519 sio_data->type = smsc47m1;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200520 break;
521 case 0x59:
Joe Perches512504e2010-10-20 06:51:49 +0000522 pr_info("Found SMSC LPC47M10x/LPC47M112/LPC47M13x\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200523 sio_data->type = smsc47m1;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200524 break;
525 case 0x5F:
Joe Perches512504e2010-10-20 06:51:49 +0000526 pr_info("Found SMSC LPC47M14x\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200527 sio_data->type = smsc47m1;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200528 break;
529 case 0x60:
Joe Perches512504e2010-10-20 06:51:49 +0000530 pr_info("Found SMSC LPC47M15x/LPC47M192/LPC47M997\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200531 sio_data->type = smsc47m1;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200532 break;
533 case 0x6B:
Jean Delvare1b54ab42009-07-28 16:31:39 +0200534 if (superio_inb(SUPERIO_REG_DEVREV) & 0x80) {
Joe Perches512504e2010-10-20 06:51:49 +0000535 pr_debug("Found SMSC LPC47M233, unsupported\n");
Jean Delvare1b54ab42009-07-28 16:31:39 +0200536 superio_exit();
537 return -ENODEV;
538 }
539
Joe Perches512504e2010-10-20 06:51:49 +0000540 pr_info("Found SMSC LPC47M292\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200541 sio_data->type = smsc47m2;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200542 break;
543 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 superio_exit();
545 return -ENODEV;
546 }
547
548 superio_select();
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700549 addr = (superio_inb(SUPERIO_REG_BASE) << 8)
Jean Delvare2d8672c2005-07-19 23:56:35 +0200550 | superio_inb(SUPERIO_REG_BASE + 1);
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700551 if (addr == 0) {
Joe Perches512504e2010-10-20 06:51:49 +0000552 pr_info("Device address not set, will not use\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 superio_exit();
554 return -ENODEV;
555 }
556
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800557 /*
558 * Enable only if address is set (needed at least on the
559 * Compaq Presario S4000NX)
560 */
Jean Delvarefa0bff02009-12-16 21:38:27 +0100561 sio_data->activate = superio_inb(SUPERIO_REG_ACT);
562 if ((sio_data->activate & 0x01) == 0) {
Joe Perches512504e2010-10-20 06:51:49 +0000563 pr_info("Enabling device\n");
Jean Delvarefa0bff02009-12-16 21:38:27 +0100564 superio_outb(SUPERIO_REG_ACT, sio_data->activate | 0x01);
565 }
566
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 superio_exit();
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700568 return addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569}
570
Jean Delvarefa0bff02009-12-16 21:38:27 +0100571/* Restore device to its initial state */
Jeff Mahoneya00d6432010-01-25 15:00:48 +0100572static void smsc47m1_restore(const struct smsc47m1_sio_data *sio_data)
Jean Delvarefa0bff02009-12-16 21:38:27 +0100573{
574 if ((sio_data->activate & 0x01) == 0) {
575 superio_enter();
576 superio_select();
577
Joe Perches512504e2010-10-20 06:51:49 +0000578 pr_info("Disabling device\n");
Jean Delvarefa0bff02009-12-16 21:38:27 +0100579 superio_outb(SUPERIO_REG_ACT, sio_data->activate);
580
581 superio_exit();
582 }
583}
584
Jean Delvarea0e92d72009-12-16 21:38:26 +0100585#define CHECK 1
586#define REQUEST 2
Jean Delvarea0e92d72009-12-16 21:38:26 +0100587
588/*
589 * This function can be used to:
590 * - test for resource conflicts with ACPI
591 * - request the resources
Jean Delvarea0e92d72009-12-16 21:38:26 +0100592 * We only allocate the I/O ports we really need, to minimize the risk of
593 * conflicts with ACPI or with other drivers.
594 */
Guenter Roeck08ad7c92012-06-02 12:04:07 -0700595static int __init smsc47m1_handle_resources(unsigned short address,
596 enum chips type, int action,
597 struct device *dev)
Jean Delvarea0e92d72009-12-16 21:38:26 +0100598{
599 static const u8 ports_m1[] = {
600 /* register, region length */
601 0x04, 1,
602 0x33, 4,
603 0x56, 7,
604 };
605
606 static const u8 ports_m2[] = {
607 /* register, region length */
608 0x04, 1,
609 0x09, 1,
610 0x2c, 2,
611 0x35, 4,
612 0x56, 7,
613 0x69, 4,
614 };
615
616 int i, ports_size, err;
617 const u8 *ports;
618
619 switch (type) {
620 case smsc47m1:
621 default:
622 ports = ports_m1;
623 ports_size = ARRAY_SIZE(ports_m1);
624 break;
625 case smsc47m2:
626 ports = ports_m2;
627 ports_size = ARRAY_SIZE(ports_m2);
628 break;
629 }
630
631 for (i = 0; i + 1 < ports_size; i += 2) {
632 unsigned short start = address + ports[i];
633 unsigned short len = ports[i + 1];
634
635 switch (action) {
636 case CHECK:
637 /* Only check for conflicts */
638 err = acpi_check_region(start, len, DRVNAME);
639 if (err)
640 return err;
641 break;
642 case REQUEST:
643 /* Request the resources */
Guenter Roeck08ad7c92012-06-02 12:04:07 -0700644 if (!devm_request_region(dev, start, len, DRVNAME)) {
645 dev_err(dev,
646 "Region 0x%hx-0x%hx already in use!\n",
647 start, start + len);
Jean Delvarea0e92d72009-12-16 21:38:26 +0100648 return -EBUSY;
649 }
650 break;
Jean Delvarea0e92d72009-12-16 21:38:26 +0100651 }
652 }
653
654 return 0;
655}
656
Guenter Roeck7e612682012-01-16 17:15:02 -0800657static void smsc47m1_remove_files(struct device *dev)
658{
659 sysfs_remove_group(&dev->kobj, &smsc47m1_group);
660 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan1);
661 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan2);
662 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan3);
663 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm1);
664 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm2);
665 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm3);
666}
667
Jean Delvare3ecf44b2009-12-16 21:38:26 +0100668static int __init smsc47m1_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200670 struct device *dev = &pdev->dev;
671 struct smsc47m1_sio_data *sio_data = dev->platform_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 struct smsc47m1_data *data;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200673 struct resource *res;
Jean Delvarea0e92d72009-12-16 21:38:26 +0100674 int err;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200675 int fan1, fan2, fan3, pwm1, pwm2, pwm3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800677 static const char * const names[] = {
Jean Delvare51f2cca2007-05-08 17:22:00 +0200678 "smsc47m1",
679 "smsc47m2",
680 };
681
682 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
Jean Delvarea0e92d72009-12-16 21:38:26 +0100683 err = smsc47m1_handle_resources(res->start, sio_data->type,
684 REQUEST, dev);
685 if (err < 0)
686 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
Guenter Roeck08ad7c92012-06-02 12:04:07 -0700688 data = devm_kzalloc(dev, sizeof(struct smsc47m1_data), GFP_KERNEL);
689 if (!data)
690 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691
Jean Delvare51f2cca2007-05-08 17:22:00 +0200692 data->addr = res->start;
693 data->type = sio_data->type;
694 data->name = names[sio_data->type];
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100695 mutex_init(&data->update_lock);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200696 platform_set_drvdata(pdev, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800698 /*
699 * If no function is properly configured, there's no point in
700 * actually registering the chip.
701 */
Jean Delvare51f2cca2007-05-08 17:22:00 +0200702 pwm1 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(0)) & 0x05)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 == 0x04;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200704 pwm2 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(1)) & 0x05)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 == 0x04;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200706 if (data->type == smsc47m2) {
Jean Delvare51f2cca2007-05-08 17:22:00 +0200707 fan1 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN1)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200708 & 0x0d) == 0x09;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200709 fan2 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN2)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200710 & 0x0d) == 0x09;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200711 fan3 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN3)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200712 & 0x0d) == 0x0d;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200713 pwm3 = (smsc47m1_read_value(data, SMSC47M2_REG_PPIN3)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200714 & 0x0d) == 0x08;
715 } else {
Jean Delvare51f2cca2007-05-08 17:22:00 +0200716 fan1 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(0))
Jean Delvare8eccbb62007-05-08 17:21:59 +0200717 & 0x05) == 0x05;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200718 fan2 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(1))
Jean Delvare8eccbb62007-05-08 17:21:59 +0200719 & 0x05) == 0x05;
720 fan3 = 0;
721 pwm3 = 0;
722 }
723 if (!(fan1 || fan2 || fan3 || pwm1 || pwm2 || pwm3)) {
Jean Delvare51f2cca2007-05-08 17:22:00 +0200724 dev_warn(dev, "Device not configured, will not use\n");
Guenter Roeck08ad7c92012-06-02 12:04:07 -0700725 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 }
727
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800728 /*
729 * Some values (fan min, clock dividers, pwm registers) may be
730 * needed before any update is triggered, so we better read them
731 * at least once here. We don't usually do it that way, but in
732 * this particular case, manually reading 5 registers out of 8
733 * doesn't make much sense and we're better using the existing
734 * function.
735 */
Jean Delvare51f2cca2007-05-08 17:22:00 +0200736 smsc47m1_update_device(dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400738 /* Register sysfs hooks */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 if (fan1) {
Guenter Roeck7e612682012-01-16 17:15:02 -0800740 err = sysfs_create_group(&dev->kobj,
741 &smsc47m1_group_fan1);
742 if (err)
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200743 goto error_remove_files;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 } else
Jean Delvare51f2cca2007-05-08 17:22:00 +0200745 dev_dbg(dev, "Fan 1 not enabled by hardware, skipping\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746
747 if (fan2) {
Guenter Roeck7e612682012-01-16 17:15:02 -0800748 err = sysfs_create_group(&dev->kobj,
749 &smsc47m1_group_fan2);
750 if (err)
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200751 goto error_remove_files;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 } else
Jean Delvare51f2cca2007-05-08 17:22:00 +0200753 dev_dbg(dev, "Fan 2 not enabled by hardware, skipping\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754
Jean Delvare8eccbb62007-05-08 17:21:59 +0200755 if (fan3) {
Guenter Roeck7e612682012-01-16 17:15:02 -0800756 err = sysfs_create_group(&dev->kobj,
757 &smsc47m1_group_fan3);
758 if (err)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200759 goto error_remove_files;
Jean Delvare8477d022007-08-16 14:33:37 +0200760 } else if (data->type == smsc47m2)
Jean Delvare51f2cca2007-05-08 17:22:00 +0200761 dev_dbg(dev, "Fan 3 not enabled by hardware, skipping\n");
Jean Delvare8eccbb62007-05-08 17:21:59 +0200762
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 if (pwm1) {
Guenter Roeck7e612682012-01-16 17:15:02 -0800764 err = sysfs_create_group(&dev->kobj,
765 &smsc47m1_group_pwm1);
766 if (err)
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200767 goto error_remove_files;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 } else
Jean Delvare51f2cca2007-05-08 17:22:00 +0200769 dev_dbg(dev, "PWM 1 not enabled by hardware, skipping\n");
Jean Delvare8eccbb62007-05-08 17:21:59 +0200770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 if (pwm2) {
Guenter Roeck7e612682012-01-16 17:15:02 -0800772 err = sysfs_create_group(&dev->kobj,
773 &smsc47m1_group_pwm2);
774 if (err)
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200775 goto error_remove_files;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 } else
Jean Delvare51f2cca2007-05-08 17:22:00 +0200777 dev_dbg(dev, "PWM 2 not enabled by hardware, skipping\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778
Jean Delvare8eccbb62007-05-08 17:21:59 +0200779 if (pwm3) {
Guenter Roeck7e612682012-01-16 17:15:02 -0800780 err = sysfs_create_group(&dev->kobj,
781 &smsc47m1_group_pwm3);
782 if (err)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200783 goto error_remove_files;
Jean Delvare8477d022007-08-16 14:33:37 +0200784 } else if (data->type == smsc47m2)
Jean Delvare51f2cca2007-05-08 17:22:00 +0200785 dev_dbg(dev, "PWM 3 not enabled by hardware, skipping\n");
Jean Delvare8eccbb62007-05-08 17:21:59 +0200786
Guenter Roeck7e612682012-01-16 17:15:02 -0800787 err = sysfs_create_group(&dev->kobj, &smsc47m1_group);
788 if (err)
Jean Delvare68a50b52007-08-12 13:58:50 +0200789 goto error_remove_files;
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200790
Tony Jones1beeffe2007-08-20 13:46:20 -0700791 data->hwmon_dev = hwmon_device_register(dev);
792 if (IS_ERR(data->hwmon_dev)) {
793 err = PTR_ERR(data->hwmon_dev);
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200794 goto error_remove_files;
795 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796
797 return 0;
798
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200799error_remove_files:
Guenter Roeck7e612682012-01-16 17:15:02 -0800800 smsc47m1_remove_files(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 return err;
802}
803
Jean Delvare3ecf44b2009-12-16 21:38:26 +0100804static int __exit smsc47m1_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200806 struct smsc47m1_data *data = platform_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807
Tony Jones1beeffe2007-08-20 13:46:20 -0700808 hwmon_device_unregister(data->hwmon_dev);
Guenter Roeck7e612682012-01-16 17:15:02 -0800809 smsc47m1_remove_files(&pdev->dev);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400810
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 return 0;
812}
813
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814static struct smsc47m1_data *smsc47m1_update_device(struct device *dev,
815 int init)
816{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200817 struct smsc47m1_data *data = dev_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100819 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
821 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) {
Jean Delvare8eccbb62007-05-08 17:21:59 +0200822 int i, fan_nr;
823 fan_nr = data->type == smsc47m2 ? 3 : 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824
Jean Delvare8eccbb62007-05-08 17:21:59 +0200825 for (i = 0; i < fan_nr; i++) {
Jean Delvare51f2cca2007-05-08 17:22:00 +0200826 data->fan[i] = smsc47m1_read_value(data,
Jean Delvare8eccbb62007-05-08 17:21:59 +0200827 SMSC47M1_REG_FAN[i]);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200828 data->fan_preload[i] = smsc47m1_read_value(data,
Jean Delvare8eccbb62007-05-08 17:21:59 +0200829 SMSC47M1_REG_FAN_PRELOAD[i]);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200830 data->pwm[i] = smsc47m1_read_value(data,
Jean Delvare8eccbb62007-05-08 17:21:59 +0200831 SMSC47M1_REG_PWM[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 }
833
Jean Delvare51f2cca2007-05-08 17:22:00 +0200834 i = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 data->fan_div[0] = (i >> 4) & 0x03;
836 data->fan_div[1] = i >> 6;
837
Jean Delvare51f2cca2007-05-08 17:22:00 +0200838 data->alarms = smsc47m1_read_value(data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 SMSC47M1_REG_ALARM) >> 6;
840 /* Clear alarms if needed */
841 if (data->alarms)
Jean Delvare51f2cca2007-05-08 17:22:00 +0200842 smsc47m1_write_value(data, SMSC47M1_REG_ALARM, 0xC0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843
Jean Delvare8eccbb62007-05-08 17:21:59 +0200844 if (fan_nr >= 3) {
Jean Delvare51f2cca2007-05-08 17:22:00 +0200845 data->fan_div[2] = (smsc47m1_read_value(data,
Jean Delvare8eccbb62007-05-08 17:21:59 +0200846 SMSC47M2_REG_FANDIV3) >> 4) & 0x03;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200847 data->alarms |= (smsc47m1_read_value(data,
Jean Delvare8eccbb62007-05-08 17:21:59 +0200848 SMSC47M2_REG_ALARM6) & 0x40) >> 4;
849 /* Clear alarm if needed */
850 if (data->alarms & 0x04)
Jean Delvare51f2cca2007-05-08 17:22:00 +0200851 smsc47m1_write_value(data,
Jean Delvare8eccbb62007-05-08 17:21:59 +0200852 SMSC47M2_REG_ALARM6,
853 0x40);
854 }
855
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 data->last_updated = jiffies;
857 }
858
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100859 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860 return data;
861}
862
Jean Delvare51f2cca2007-05-08 17:22:00 +0200863static int __init smsc47m1_device_add(unsigned short address,
864 const struct smsc47m1_sio_data *sio_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200866 struct resource res = {
867 .start = address,
868 .end = address + SMSC_EXTENT - 1,
869 .name = DRVNAME,
870 .flags = IORESOURCE_IO,
871 };
872 int err;
873
Jean Delvarea0e92d72009-12-16 21:38:26 +0100874 err = smsc47m1_handle_resources(address, sio_data->type, CHECK, NULL);
Jean Delvareb9acb642009-01-07 16:37:35 +0100875 if (err)
876 goto exit;
877
Jean Delvare51f2cca2007-05-08 17:22:00 +0200878 pdev = platform_device_alloc(DRVNAME, address);
879 if (!pdev) {
880 err = -ENOMEM;
Joe Perches512504e2010-10-20 06:51:49 +0000881 pr_err("Device allocation failed\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200882 goto exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 }
884
Jean Delvare51f2cca2007-05-08 17:22:00 +0200885 err = platform_device_add_resources(pdev, &res, 1);
886 if (err) {
Joe Perches512504e2010-10-20 06:51:49 +0000887 pr_err("Device resource addition failed (%d)\n", err);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200888 goto exit_device_put;
889 }
890
Jean Delvare2df6d812007-06-09 10:11:16 -0400891 err = platform_device_add_data(pdev, sio_data,
892 sizeof(struct smsc47m1_sio_data));
893 if (err) {
Joe Perches512504e2010-10-20 06:51:49 +0000894 pr_err("Platform data allocation failed\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200895 goto exit_device_put;
896 }
Jean Delvare51f2cca2007-05-08 17:22:00 +0200897
898 err = platform_device_add(pdev);
899 if (err) {
Joe Perches512504e2010-10-20 06:51:49 +0000900 pr_err("Device addition failed (%d)\n", err);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200901 goto exit_device_put;
902 }
903
904 return 0;
905
906exit_device_put:
907 platform_device_put(pdev);
908exit:
909 return err;
910}
911
912static int __init sm_smsc47m1_init(void)
913{
914 int err;
915 unsigned short address;
916 struct smsc47m1_sio_data sio_data;
917
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700918 err = smsc47m1_find(&sio_data);
919 if (err < 0)
920 return err;
921 address = err;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200922
Jean Delvare51f2cca2007-05-08 17:22:00 +0200923 /* Sets global pdev as a side effect */
924 err = smsc47m1_device_add(address, &sio_data);
925 if (err)
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700926 return err;
Jean Delvare3ecf44b2009-12-16 21:38:26 +0100927
928 err = platform_driver_probe(&smsc47m1_driver, smsc47m1_probe);
929 if (err)
930 goto exit_device;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200931
932 return 0;
933
Jean Delvare3ecf44b2009-12-16 21:38:26 +0100934exit_device:
935 platform_device_unregister(pdev);
Jean Delvarefa0bff02009-12-16 21:38:27 +0100936 smsc47m1_restore(&sio_data);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200937 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938}
939
940static void __exit sm_smsc47m1_exit(void)
941{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200942 platform_driver_unregister(&smsc47m1_driver);
Jean Delvarefa0bff02009-12-16 21:38:27 +0100943 smsc47m1_restore(pdev->dev.platform_data);
Jean Delvare3ecf44b2009-12-16 21:38:26 +0100944 platform_device_unregister(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945}
946
947MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>");
948MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver");
949MODULE_LICENSE("GPL");
950
951module_init(sm_smsc47m1_init);
952module_exit(sm_smsc47m1_exit);