blob: d7485659acc50291c195780caf3ff3bdd68c6981 [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>
Jean Delvare7c81c602014-01-29 20:40:08 +010010 * Copyright (C) 2004-2007 Jean Delvare <jdelvare@suse.de>
Guenter Roeck85a0c0d2012-01-14 22:27:00 -080011 * 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 +0200145static inline int smsc47m1_read_value(struct smsc47m1_data *data, u8 reg)
Jean Delvare94e183f2007-05-08 17:21:59 +0200146{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200147 return inb_p(data->addr + reg);
Jean Delvare94e183f2007-05-08 17:21:59 +0200148}
149
Jean Delvare51f2cca2007-05-08 17:22:00 +0200150static inline void smsc47m1_write_value(struct smsc47m1_data *data, u8 reg,
Jean Delvare94e183f2007-05-08 17:21:59 +0200151 u8 value)
152{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200153 outb_p(value, data->addr + reg);
Jean Delvare94e183f2007-05-08 17:21:59 +0200154}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Axel Line70198a2014-07-17 19:15:36 +0800156static struct smsc47m1_data *smsc47m1_update_device(struct device *dev,
157 int init)
158{
159 struct smsc47m1_data *data = dev_get_drvdata(dev);
160
161 mutex_lock(&data->update_lock);
162
163 if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) {
164 int i, fan_nr;
165 fan_nr = data->type == smsc47m2 ? 3 : 2;
166
167 for (i = 0; i < fan_nr; i++) {
168 data->fan[i] = smsc47m1_read_value(data,
169 SMSC47M1_REG_FAN[i]);
170 data->fan_preload[i] = smsc47m1_read_value(data,
171 SMSC47M1_REG_FAN_PRELOAD[i]);
172 data->pwm[i] = smsc47m1_read_value(data,
173 SMSC47M1_REG_PWM[i]);
174 }
175
176 i = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV);
177 data->fan_div[0] = (i >> 4) & 0x03;
178 data->fan_div[1] = i >> 6;
179
180 data->alarms = smsc47m1_read_value(data,
181 SMSC47M1_REG_ALARM) >> 6;
182 /* Clear alarms if needed */
183 if (data->alarms)
184 smsc47m1_write_value(data, SMSC47M1_REG_ALARM, 0xC0);
185
186 if (fan_nr >= 3) {
187 data->fan_div[2] = (smsc47m1_read_value(data,
188 SMSC47M2_REG_FANDIV3) >> 4) & 0x03;
189 data->alarms |= (smsc47m1_read_value(data,
190 SMSC47M2_REG_ALARM6) & 0x40) >> 4;
191 /* Clear alarm if needed */
192 if (data->alarms & 0x04)
193 smsc47m1_write_value(data,
194 SMSC47M2_REG_ALARM6,
195 0x40);
196 }
197
198 data->last_updated = jiffies;
199 }
200
201 mutex_unlock(&data->update_lock);
202 return data;
203}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200205static ssize_t get_fan(struct device *dev, struct device_attribute
206 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200208 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200210 int nr = attr->index;
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800211 /*
212 * This chip (stupidly) stops monitoring fan speed if PWM is
213 * enabled and duty cycle is 0%. This is fine if the monitoring
214 * and control concern the same fan, but troublesome if they are
215 * not (which could as well happen).
216 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 :
218 FAN_FROM_REG(data->fan[nr],
219 DIV_FROM_REG(data->fan_div[nr]),
220 data->fan_preload[nr]);
221 return sprintf(buf, "%d\n", rpm);
222}
223
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200224static ssize_t get_fan_min(struct device *dev, struct device_attribute
225 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200227 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200229 int nr = attr->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 int rpm = MIN_FROM_REG(data->fan_preload[nr],
231 DIV_FROM_REG(data->fan_div[nr]));
232 return sprintf(buf, "%d\n", rpm);
233}
234
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200235static ssize_t get_fan_div(struct device *dev, struct device_attribute
236 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200238 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200240 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241}
242
Jean Delvare1f08af72008-01-06 15:36:13 +0100243static ssize_t get_fan_alarm(struct device *dev, struct device_attribute
244 *devattr, char *buf)
245{
246 int bitnr = to_sensor_dev_attr(devattr)->index;
247 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
248 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
249}
250
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200251static ssize_t get_pwm(struct device *dev, struct device_attribute
252 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200254 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200256 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257}
258
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200259static ssize_t get_pwm_en(struct device *dev, struct device_attribute
260 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200262 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200264 return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[attr->index]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265}
266
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200267static ssize_t get_alarms(struct device *dev, struct device_attribute
268 *devattr, char *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{
270 struct smsc47m1_data *data = smsc47m1_update_device(dev, 0);
271 return sprintf(buf, "%d\n", data->alarms);
272}
273
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200274static ssize_t set_fan_min(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 rpmdiv;
281 long val;
282 int err;
283
284 err = kstrtol(buf, 10, &val);
285 if (err)
286 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100288 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]);
290
291 if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) {
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100292 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 return -EINVAL;
294 }
295
296 data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200297 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 data->fan_preload[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100299 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
301 return count;
302}
303
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800304/*
305 * Note: we save and restore the fan minimum here, because its value is
306 * determined in part by the fan clock divider. This follows the principle
307 * of least surprise; the user doesn't expect the fan minimum to change just
308 * because the divider changed.
309 */
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200310static ssize_t set_fan_div(struct device *dev, struct device_attribute
311 *devattr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200313 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200314 struct smsc47m1_data *data = dev_get_drvdata(dev);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200315 int nr = attr->index;
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800316 long new_div;
317 int err;
318 long tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 u8 old_div = DIV_FROM_REG(data->fan_div[nr]);
320
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800321 err = kstrtol(buf, 10, &new_div);
322 if (err)
323 return err;
324
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 if (new_div == old_div) /* No change */
326 return count;
327
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100328 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 switch (new_div) {
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800330 case 1:
331 data->fan_div[nr] = 0;
332 break;
333 case 2:
334 data->fan_div[nr] = 1;
335 break;
336 case 4:
337 data->fan_div[nr] = 2;
338 break;
339 case 8:
340 data->fan_div[nr] = 3;
341 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 default:
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100343 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 return -EINVAL;
345 }
346
Jean Delvare8eccbb62007-05-08 17:21:59 +0200347 switch (nr) {
348 case 0:
349 case 1:
Jean Delvare51f2cca2007-05-08 17:22:00 +0200350 tmp = smsc47m1_read_value(data, SMSC47M1_REG_FANDIV)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200351 & ~(0x03 << (4 + 2 * nr));
352 tmp |= data->fan_div[nr] << (4 + 2 * nr);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200353 smsc47m1_write_value(data, SMSC47M1_REG_FANDIV, tmp);
Jean Delvare8eccbb62007-05-08 17:21:59 +0200354 break;
355 case 2:
Jean Delvare51f2cca2007-05-08 17:22:00 +0200356 tmp = smsc47m1_read_value(data, SMSC47M2_REG_FANDIV3) & 0xCF;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200357 tmp |= data->fan_div[2] << 4;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200358 smsc47m1_write_value(data, SMSC47M2_REG_FANDIV3, tmp);
Jean Delvare8eccbb62007-05-08 17:21:59 +0200359 break;
360 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362 /* Preserve fan min */
363 tmp = 192 - (old_div * (192 - data->fan_preload[nr])
364 + new_div / 2) / new_div;
Guenter Roeck2a844c12013-01-09 08:09:34 -0800365 data->fan_preload[nr] = clamp_val(tmp, 0, 191);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200366 smsc47m1_write_value(data, SMSC47M1_REG_FAN_PRELOAD[nr],
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 data->fan_preload[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100368 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
370 return count;
371}
372
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200373static ssize_t set_pwm(struct device *dev, struct device_attribute
374 *devattr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200376 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200377 struct smsc47m1_data *data = dev_get_drvdata(dev);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200378 int nr = attr->index;
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800379 long val;
380 int err;
381
382 err = kstrtol(buf, 10, &val);
383 if (err)
384 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386 if (val < 0 || val > 255)
387 return -EINVAL;
388
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100389 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 data->pwm[nr] &= 0x81; /* Preserve additional bits */
391 data->pwm[nr] |= PWM_TO_REG(val);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200392 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 data->pwm[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100394 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
396 return count;
397}
398
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200399static ssize_t set_pwm_en(struct device *dev, struct device_attribute
400 *devattr, const char *buf, size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401{
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200402 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200403 struct smsc47m1_data *data = dev_get_drvdata(dev);
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200404 int nr = attr->index;
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800405 unsigned long val;
406 int err;
407
408 err = kstrtoul(buf, 10, &val);
409 if (err)
410 return err;
411
412 if (val > 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 return -EINVAL;
414
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100415 mutex_lock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 data->pwm[nr] &= 0xFE; /* preserve the other bits */
417 data->pwm[nr] |= !val;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200418 smsc47m1_write_value(data, SMSC47M1_REG_PWM[nr],
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 data->pwm[nr]);
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100420 mutex_unlock(&data->update_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421
422 return count;
423}
424
425#define fan_present(offset) \
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200426static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, get_fan, \
427 NULL, offset - 1); \
428static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
429 get_fan_min, set_fan_min, offset - 1); \
430static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
431 get_fan_div, set_fan_div, offset - 1); \
Jean Delvare1f08af72008-01-06 15:36:13 +0100432static SENSOR_DEVICE_ATTR(fan##offset##_alarm, S_IRUGO, get_fan_alarm, \
433 NULL, offset - 1); \
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200434static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
435 get_pwm, set_pwm, offset - 1); \
436static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
437 get_pwm_en, set_pwm_en, offset - 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
439fan_present(1);
440fan_present(2);
Jean Delvare8eccbb62007-05-08 17:21:59 +0200441fan_present(3);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442
443static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL);
444
Jean Delvare51f2cca2007-05-08 17:22:00 +0200445static ssize_t show_name(struct device *dev, struct device_attribute
446 *devattr, char *buf)
447{
448 struct smsc47m1_data *data = dev_get_drvdata(dev);
449
450 return sprintf(buf, "%s\n", data->name);
451}
452static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
453
Guenter Roeck7e612682012-01-16 17:15:02 -0800454static struct attribute *smsc47m1_attributes_fan1[] = {
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200455 &sensor_dev_attr_fan1_input.dev_attr.attr,
456 &sensor_dev_attr_fan1_min.dev_attr.attr,
457 &sensor_dev_attr_fan1_div.dev_attr.attr,
Jean Delvare1f08af72008-01-06 15:36:13 +0100458 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
Guenter Roeck7e612682012-01-16 17:15:02 -0800459 NULL
460};
461
462static const struct attribute_group smsc47m1_group_fan1 = {
463 .attrs = smsc47m1_attributes_fan1,
464};
465
466static struct attribute *smsc47m1_attributes_fan2[] = {
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200467 &sensor_dev_attr_fan2_input.dev_attr.attr,
468 &sensor_dev_attr_fan2_min.dev_attr.attr,
469 &sensor_dev_attr_fan2_div.dev_attr.attr,
Jean Delvare1f08af72008-01-06 15:36:13 +0100470 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
Guenter Roeck7e612682012-01-16 17:15:02 -0800471 NULL
472};
473
474static const struct attribute_group smsc47m1_group_fan2 = {
475 .attrs = smsc47m1_attributes_fan2,
476};
477
478static struct attribute *smsc47m1_attributes_fan3[] = {
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200479 &sensor_dev_attr_fan3_input.dev_attr.attr,
480 &sensor_dev_attr_fan3_min.dev_attr.attr,
481 &sensor_dev_attr_fan3_div.dev_attr.attr,
Jean Delvare1f08af72008-01-06 15:36:13 +0100482 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
Guenter Roeck7e612682012-01-16 17:15:02 -0800483 NULL
484};
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200485
Guenter Roeck7e612682012-01-16 17:15:02 -0800486static const struct attribute_group smsc47m1_group_fan3 = {
487 .attrs = smsc47m1_attributes_fan3,
488};
489
490static struct attribute *smsc47m1_attributes_pwm1[] = {
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200491 &sensor_dev_attr_pwm1.dev_attr.attr,
492 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
Guenter Roeck7e612682012-01-16 17:15:02 -0800493 NULL
494};
495
496static const struct attribute_group smsc47m1_group_pwm1 = {
497 .attrs = smsc47m1_attributes_pwm1,
498};
499
500static struct attribute *smsc47m1_attributes_pwm2[] = {
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200501 &sensor_dev_attr_pwm2.dev_attr.attr,
502 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
Guenter Roeck7e612682012-01-16 17:15:02 -0800503 NULL
504};
505
506static const struct attribute_group smsc47m1_group_pwm2 = {
507 .attrs = smsc47m1_attributes_pwm2,
508};
509
510static struct attribute *smsc47m1_attributes_pwm3[] = {
Jean Delvaree84cfbc2007-05-08 17:22:00 +0200511 &sensor_dev_attr_pwm3.dev_attr.attr,
512 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
Guenter Roeck7e612682012-01-16 17:15:02 -0800513 NULL
514};
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200515
Guenter Roeck7e612682012-01-16 17:15:02 -0800516static const struct attribute_group smsc47m1_group_pwm3 = {
517 .attrs = smsc47m1_attributes_pwm3,
518};
519
520static struct attribute *smsc47m1_attributes[] = {
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200521 &dev_attr_alarms.attr,
Jean Delvare51f2cca2007-05-08 17:22:00 +0200522 &dev_attr_name.attr,
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200523 NULL
524};
525
526static const struct attribute_group smsc47m1_group = {
527 .attrs = smsc47m1_attributes,
528};
529
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700530static int __init smsc47m1_find(struct smsc47m1_sio_data *sio_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531{
532 u8 val;
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700533 unsigned short addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534
535 superio_enter();
Jean Delvare67b671b2007-12-06 23:13:42 +0100536 val = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537
538 /*
Jean Delvare60917802006-10-08 22:00:44 +0200539 * SMSC LPC47M10x/LPC47M112/LPC47M13x (device id 0x59), LPC47M14x
540 * (device id 0x5F) and LPC47B27x (device id 0x51) have fan control.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 * The LPC47M15x and LPC47M192 chips "with hardware monitoring block"
Jean Delvareec5ce552005-04-26 22:09:43 +0200542 * can do much more besides (device id 0x60).
Jean Delvareb890a072005-10-26 22:21:24 +0200543 * The LPC47M997 is undocumented, but seems to be compatible with
544 * the LPC47M192, and has the same device id.
Jean Delvare8eccbb62007-05-08 17:21:59 +0200545 * The LPC47M292 (device id 0x6B) is somewhat compatible, but it
546 * supports a 3rd fan, and the pin configuration registers are
547 * unfortunately different.
Jean Delvare1b54ab42009-07-28 16:31:39 +0200548 * The LPC47M233 has the same device id (0x6B) but is not compatible.
549 * We check the high bit of the device revision register to
550 * differentiate them.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 */
Jean Delvare51f2cca2007-05-08 17:22:00 +0200552 switch (val) {
Jean Delvare8eccbb62007-05-08 17:21:59 +0200553 case 0x51:
Joe Perches512504e2010-10-20 06:51:49 +0000554 pr_info("Found SMSC LPC47B27x\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200555 sio_data->type = smsc47m1;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200556 break;
557 case 0x59:
Joe Perches512504e2010-10-20 06:51:49 +0000558 pr_info("Found SMSC LPC47M10x/LPC47M112/LPC47M13x\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200559 sio_data->type = smsc47m1;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200560 break;
561 case 0x5F:
Joe Perches512504e2010-10-20 06:51:49 +0000562 pr_info("Found SMSC LPC47M14x\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200563 sio_data->type = smsc47m1;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200564 break;
565 case 0x60:
Joe Perches512504e2010-10-20 06:51:49 +0000566 pr_info("Found SMSC LPC47M15x/LPC47M192/LPC47M997\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200567 sio_data->type = smsc47m1;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200568 break;
569 case 0x6B:
Jean Delvare1b54ab42009-07-28 16:31:39 +0200570 if (superio_inb(SUPERIO_REG_DEVREV) & 0x80) {
Joe Perches512504e2010-10-20 06:51:49 +0000571 pr_debug("Found SMSC LPC47M233, unsupported\n");
Jean Delvare1b54ab42009-07-28 16:31:39 +0200572 superio_exit();
573 return -ENODEV;
574 }
575
Joe Perches512504e2010-10-20 06:51:49 +0000576 pr_info("Found SMSC LPC47M292\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200577 sio_data->type = smsc47m2;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200578 break;
579 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 superio_exit();
581 return -ENODEV;
582 }
583
584 superio_select();
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700585 addr = (superio_inb(SUPERIO_REG_BASE) << 8)
Jean Delvare2d8672c2005-07-19 23:56:35 +0200586 | superio_inb(SUPERIO_REG_BASE + 1);
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700587 if (addr == 0) {
Joe Perches512504e2010-10-20 06:51:49 +0000588 pr_info("Device address not set, will not use\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 superio_exit();
590 return -ENODEV;
591 }
592
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800593 /*
594 * Enable only if address is set (needed at least on the
595 * Compaq Presario S4000NX)
596 */
Jean Delvarefa0bff02009-12-16 21:38:27 +0100597 sio_data->activate = superio_inb(SUPERIO_REG_ACT);
598 if ((sio_data->activate & 0x01) == 0) {
Joe Perches512504e2010-10-20 06:51:49 +0000599 pr_info("Enabling device\n");
Jean Delvarefa0bff02009-12-16 21:38:27 +0100600 superio_outb(SUPERIO_REG_ACT, sio_data->activate | 0x01);
601 }
602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 superio_exit();
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700604 return addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605}
606
Jean Delvarefa0bff02009-12-16 21:38:27 +0100607/* Restore device to its initial state */
Jeff Mahoneya00d6432010-01-25 15:00:48 +0100608static void smsc47m1_restore(const struct smsc47m1_sio_data *sio_data)
Jean Delvarefa0bff02009-12-16 21:38:27 +0100609{
610 if ((sio_data->activate & 0x01) == 0) {
611 superio_enter();
612 superio_select();
613
Joe Perches512504e2010-10-20 06:51:49 +0000614 pr_info("Disabling device\n");
Jean Delvarefa0bff02009-12-16 21:38:27 +0100615 superio_outb(SUPERIO_REG_ACT, sio_data->activate);
616
617 superio_exit();
618 }
619}
620
Jean Delvarea0e92d72009-12-16 21:38:26 +0100621#define CHECK 1
622#define REQUEST 2
Jean Delvarea0e92d72009-12-16 21:38:26 +0100623
624/*
625 * This function can be used to:
626 * - test for resource conflicts with ACPI
627 * - request the resources
Jean Delvarea0e92d72009-12-16 21:38:26 +0100628 * We only allocate the I/O ports we really need, to minimize the risk of
629 * conflicts with ACPI or with other drivers.
630 */
Guenter Roeck08ad7c92012-06-02 12:04:07 -0700631static int __init smsc47m1_handle_resources(unsigned short address,
632 enum chips type, int action,
633 struct device *dev)
Jean Delvarea0e92d72009-12-16 21:38:26 +0100634{
635 static const u8 ports_m1[] = {
636 /* register, region length */
637 0x04, 1,
638 0x33, 4,
639 0x56, 7,
640 };
641
642 static const u8 ports_m2[] = {
643 /* register, region length */
644 0x04, 1,
645 0x09, 1,
646 0x2c, 2,
647 0x35, 4,
648 0x56, 7,
649 0x69, 4,
650 };
651
652 int i, ports_size, err;
653 const u8 *ports;
654
655 switch (type) {
656 case smsc47m1:
657 default:
658 ports = ports_m1;
659 ports_size = ARRAY_SIZE(ports_m1);
660 break;
661 case smsc47m2:
662 ports = ports_m2;
663 ports_size = ARRAY_SIZE(ports_m2);
664 break;
665 }
666
667 for (i = 0; i + 1 < ports_size; i += 2) {
668 unsigned short start = address + ports[i];
669 unsigned short len = ports[i + 1];
670
671 switch (action) {
672 case CHECK:
673 /* Only check for conflicts */
674 err = acpi_check_region(start, len, DRVNAME);
675 if (err)
676 return err;
677 break;
678 case REQUEST:
679 /* Request the resources */
Guenter Roeck08ad7c92012-06-02 12:04:07 -0700680 if (!devm_request_region(dev, start, len, DRVNAME)) {
681 dev_err(dev,
682 "Region 0x%hx-0x%hx already in use!\n",
683 start, start + len);
Jean Delvarea0e92d72009-12-16 21:38:26 +0100684 return -EBUSY;
685 }
686 break;
Jean Delvarea0e92d72009-12-16 21:38:26 +0100687 }
688 }
689
690 return 0;
691}
692
Guenter Roeck7e612682012-01-16 17:15:02 -0800693static void smsc47m1_remove_files(struct device *dev)
694{
695 sysfs_remove_group(&dev->kobj, &smsc47m1_group);
696 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan1);
697 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan2);
698 sysfs_remove_group(&dev->kobj, &smsc47m1_group_fan3);
699 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm1);
700 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm2);
701 sysfs_remove_group(&dev->kobj, &smsc47m1_group_pwm3);
702}
703
Jean Delvare3ecf44b2009-12-16 21:38:26 +0100704static int __init smsc47m1_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200706 struct device *dev = &pdev->dev;
Jingoo Hana8b3a3a2013-07-30 17:13:06 +0900707 struct smsc47m1_sio_data *sio_data = dev_get_platdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 struct smsc47m1_data *data;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200709 struct resource *res;
Jean Delvarea0e92d72009-12-16 21:38:26 +0100710 int err;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200711 int fan1, fan2, fan3, pwm1, pwm2, pwm3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800713 static const char * const names[] = {
Jean Delvare51f2cca2007-05-08 17:22:00 +0200714 "smsc47m1",
715 "smsc47m2",
716 };
717
718 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
Jean Delvarea0e92d72009-12-16 21:38:26 +0100719 err = smsc47m1_handle_resources(res->start, sio_data->type,
720 REQUEST, dev);
721 if (err < 0)
722 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
Guenter Roeck08ad7c92012-06-02 12:04:07 -0700724 data = devm_kzalloc(dev, sizeof(struct smsc47m1_data), GFP_KERNEL);
725 if (!data)
726 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727
Jean Delvare51f2cca2007-05-08 17:22:00 +0200728 data->addr = res->start;
729 data->type = sio_data->type;
730 data->name = names[sio_data->type];
Ingo Molnar9a61bf62006-01-18 23:19:26 +0100731 mutex_init(&data->update_lock);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200732 platform_set_drvdata(pdev, data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800734 /*
735 * If no function is properly configured, there's no point in
736 * actually registering the chip.
737 */
Jean Delvare51f2cca2007-05-08 17:22:00 +0200738 pwm1 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(0)) & 0x05)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 == 0x04;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200740 pwm2 = (smsc47m1_read_value(data, SMSC47M1_REG_PPIN(1)) & 0x05)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 == 0x04;
Jean Delvare8eccbb62007-05-08 17:21:59 +0200742 if (data->type == smsc47m2) {
Jean Delvare51f2cca2007-05-08 17:22:00 +0200743 fan1 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN1)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200744 & 0x0d) == 0x09;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200745 fan2 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN2)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200746 & 0x0d) == 0x09;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200747 fan3 = (smsc47m1_read_value(data, SMSC47M2_REG_TPIN3)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200748 & 0x0d) == 0x0d;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200749 pwm3 = (smsc47m1_read_value(data, SMSC47M2_REG_PPIN3)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200750 & 0x0d) == 0x08;
751 } else {
Jean Delvare51f2cca2007-05-08 17:22:00 +0200752 fan1 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(0))
Jean Delvare8eccbb62007-05-08 17:21:59 +0200753 & 0x05) == 0x05;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200754 fan2 = (smsc47m1_read_value(data, SMSC47M1_REG_TPIN(1))
Jean Delvare8eccbb62007-05-08 17:21:59 +0200755 & 0x05) == 0x05;
756 fan3 = 0;
757 pwm3 = 0;
758 }
759 if (!(fan1 || fan2 || fan3 || pwm1 || pwm2 || pwm3)) {
Jean Delvare51f2cca2007-05-08 17:22:00 +0200760 dev_warn(dev, "Device not configured, will not use\n");
Guenter Roeck08ad7c92012-06-02 12:04:07 -0700761 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 }
763
Guenter Roeck85a0c0d2012-01-14 22:27:00 -0800764 /*
765 * Some values (fan min, clock dividers, pwm registers) may be
766 * needed before any update is triggered, so we better read them
767 * at least once here. We don't usually do it that way, but in
768 * this particular case, manually reading 5 registers out of 8
769 * doesn't make much sense and we're better using the existing
770 * function.
771 */
Jean Delvare51f2cca2007-05-08 17:22:00 +0200772 smsc47m1_update_device(dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400774 /* Register sysfs hooks */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 if (fan1) {
Guenter Roeck7e612682012-01-16 17:15:02 -0800776 err = sysfs_create_group(&dev->kobj,
777 &smsc47m1_group_fan1);
778 if (err)
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200779 goto error_remove_files;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 } else
Jean Delvare51f2cca2007-05-08 17:22:00 +0200781 dev_dbg(dev, "Fan 1 not enabled by hardware, skipping\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
783 if (fan2) {
Guenter Roeck7e612682012-01-16 17:15:02 -0800784 err = sysfs_create_group(&dev->kobj,
785 &smsc47m1_group_fan2);
786 if (err)
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200787 goto error_remove_files;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 } else
Jean Delvare51f2cca2007-05-08 17:22:00 +0200789 dev_dbg(dev, "Fan 2 not enabled by hardware, skipping\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790
Jean Delvare8eccbb62007-05-08 17:21:59 +0200791 if (fan3) {
Guenter Roeck7e612682012-01-16 17:15:02 -0800792 err = sysfs_create_group(&dev->kobj,
793 &smsc47m1_group_fan3);
794 if (err)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200795 goto error_remove_files;
Jean Delvare8477d022007-08-16 14:33:37 +0200796 } else if (data->type == smsc47m2)
Jean Delvare51f2cca2007-05-08 17:22:00 +0200797 dev_dbg(dev, "Fan 3 not enabled by hardware, skipping\n");
Jean Delvare8eccbb62007-05-08 17:21:59 +0200798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 if (pwm1) {
Guenter Roeck7e612682012-01-16 17:15:02 -0800800 err = sysfs_create_group(&dev->kobj,
801 &smsc47m1_group_pwm1);
802 if (err)
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200803 goto error_remove_files;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 } else
Jean Delvare51f2cca2007-05-08 17:22:00 +0200805 dev_dbg(dev, "PWM 1 not enabled by hardware, skipping\n");
Jean Delvare8eccbb62007-05-08 17:21:59 +0200806
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 if (pwm2) {
Guenter Roeck7e612682012-01-16 17:15:02 -0800808 err = sysfs_create_group(&dev->kobj,
809 &smsc47m1_group_pwm2);
810 if (err)
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200811 goto error_remove_files;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 } else
Jean Delvare51f2cca2007-05-08 17:22:00 +0200813 dev_dbg(dev, "PWM 2 not enabled by hardware, skipping\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
Jean Delvare8eccbb62007-05-08 17:21:59 +0200815 if (pwm3) {
Guenter Roeck7e612682012-01-16 17:15:02 -0800816 err = sysfs_create_group(&dev->kobj,
817 &smsc47m1_group_pwm3);
818 if (err)
Jean Delvare8eccbb62007-05-08 17:21:59 +0200819 goto error_remove_files;
Jean Delvare8477d022007-08-16 14:33:37 +0200820 } else if (data->type == smsc47m2)
Jean Delvare51f2cca2007-05-08 17:22:00 +0200821 dev_dbg(dev, "PWM 3 not enabled by hardware, skipping\n");
Jean Delvare8eccbb62007-05-08 17:21:59 +0200822
Guenter Roeck7e612682012-01-16 17:15:02 -0800823 err = sysfs_create_group(&dev->kobj, &smsc47m1_group);
824 if (err)
Jean Delvare68a50b52007-08-12 13:58:50 +0200825 goto error_remove_files;
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200826
Tony Jones1beeffe2007-08-20 13:46:20 -0700827 data->hwmon_dev = hwmon_device_register(dev);
828 if (IS_ERR(data->hwmon_dev)) {
829 err = PTR_ERR(data->hwmon_dev);
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200830 goto error_remove_files;
831 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832
833 return 0;
834
Jean Delvarece8c6ce12006-09-24 21:25:12 +0200835error_remove_files:
Guenter Roeck7e612682012-01-16 17:15:02 -0800836 smsc47m1_remove_files(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 return err;
838}
839
Jean Delvare3ecf44b2009-12-16 21:38:26 +0100840static int __exit smsc47m1_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200842 struct smsc47m1_data *data = platform_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843
Tony Jones1beeffe2007-08-20 13:46:20 -0700844 hwmon_device_unregister(data->hwmon_dev);
Guenter Roeck7e612682012-01-16 17:15:02 -0800845 smsc47m1_remove_files(&pdev->dev);
Mark M. Hoffman943b0832005-07-15 21:39:18 -0400846
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 return 0;
848}
849
Axel Line70198a2014-07-17 19:15:36 +0800850static struct platform_driver smsc47m1_driver = {
851 .driver = {
852 .owner = THIS_MODULE,
853 .name = DRVNAME,
854 },
855 .remove = __exit_p(smsc47m1_remove),
856};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857
Jean Delvare51f2cca2007-05-08 17:22:00 +0200858static int __init smsc47m1_device_add(unsigned short address,
859 const struct smsc47m1_sio_data *sio_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200861 struct resource res = {
862 .start = address,
863 .end = address + SMSC_EXTENT - 1,
864 .name = DRVNAME,
865 .flags = IORESOURCE_IO,
866 };
867 int err;
868
Jean Delvarea0e92d72009-12-16 21:38:26 +0100869 err = smsc47m1_handle_resources(address, sio_data->type, CHECK, NULL);
Jean Delvareb9acb642009-01-07 16:37:35 +0100870 if (err)
871 goto exit;
872
Jean Delvare51f2cca2007-05-08 17:22:00 +0200873 pdev = platform_device_alloc(DRVNAME, address);
874 if (!pdev) {
875 err = -ENOMEM;
Joe Perches512504e2010-10-20 06:51:49 +0000876 pr_err("Device allocation failed\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200877 goto exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 }
879
Jean Delvare51f2cca2007-05-08 17:22:00 +0200880 err = platform_device_add_resources(pdev, &res, 1);
881 if (err) {
Joe Perches512504e2010-10-20 06:51:49 +0000882 pr_err("Device resource addition failed (%d)\n", err);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200883 goto exit_device_put;
884 }
885
Jean Delvare2df6d812007-06-09 10:11:16 -0400886 err = platform_device_add_data(pdev, sio_data,
887 sizeof(struct smsc47m1_sio_data));
888 if (err) {
Joe Perches512504e2010-10-20 06:51:49 +0000889 pr_err("Platform data allocation failed\n");
Jean Delvare51f2cca2007-05-08 17:22:00 +0200890 goto exit_device_put;
891 }
Jean Delvare51f2cca2007-05-08 17:22:00 +0200892
893 err = platform_device_add(pdev);
894 if (err) {
Joe Perches512504e2010-10-20 06:51:49 +0000895 pr_err("Device addition failed (%d)\n", err);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200896 goto exit_device_put;
897 }
898
899 return 0;
900
901exit_device_put:
902 platform_device_put(pdev);
903exit:
904 return err;
905}
906
907static int __init sm_smsc47m1_init(void)
908{
909 int err;
910 unsigned short address;
911 struct smsc47m1_sio_data sio_data;
912
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700913 err = smsc47m1_find(&sio_data);
914 if (err < 0)
915 return err;
916 address = err;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200917
Jean Delvare51f2cca2007-05-08 17:22:00 +0200918 /* Sets global pdev as a side effect */
919 err = smsc47m1_device_add(address, &sio_data);
920 if (err)
Guenter Roeck1d0045e2012-03-28 08:55:12 -0700921 return err;
Jean Delvare3ecf44b2009-12-16 21:38:26 +0100922
923 err = platform_driver_probe(&smsc47m1_driver, smsc47m1_probe);
924 if (err)
925 goto exit_device;
Jean Delvare51f2cca2007-05-08 17:22:00 +0200926
927 return 0;
928
Jean Delvare3ecf44b2009-12-16 21:38:26 +0100929exit_device:
930 platform_device_unregister(pdev);
Jean Delvarefa0bff02009-12-16 21:38:27 +0100931 smsc47m1_restore(&sio_data);
Jean Delvare51f2cca2007-05-08 17:22:00 +0200932 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933}
934
935static void __exit sm_smsc47m1_exit(void)
936{
Jean Delvare51f2cca2007-05-08 17:22:00 +0200937 platform_driver_unregister(&smsc47m1_driver);
Jingoo Hana8b3a3a2013-07-30 17:13:06 +0900938 smsc47m1_restore(dev_get_platdata(&pdev->dev));
Jean Delvare3ecf44b2009-12-16 21:38:26 +0100939 platform_device_unregister(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940}
941
942MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>");
943MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver");
944MODULE_LICENSE("GPL");
945
946module_init(sm_smsc47m1_init);
947module_exit(sm_smsc47m1_exit);