Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Guenter Roeck | 2a52dd6 | 2012-01-19 11:02:25 -0800 | [diff] [blame] | 2 | * smsc47b397.c - Part of lm_sensors, Linux kernel modules |
| 3 | * for hardware monitoring |
| 4 | * |
| 5 | * Supports the SMSC LPC47B397-NC Super-I/O chip. |
| 6 | * |
| 7 | * Author/Maintainer: Mark M. Hoffman <mhoffman@lightlink.com> |
| 8 | * Copyright (C) 2004 Utilitek Systems, Inc. |
| 9 | * |
| 10 | * derived in part from smsc47m1.c: |
| 11 | * Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> |
| 12 | * Copyright (C) 2004 Jean Delvare <khali@linux-fr.org> |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License as published by |
| 16 | * the Free Software Foundation; either version 2 of the License, or |
| 17 | * (at your option) any later version. |
| 18 | * |
| 19 | * This program is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License |
| 25 | * along with this program; if not, write to the Free Software |
| 26 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 27 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
Joe Perches | bf1a85e | 2010-10-20 06:51:48 +0000 | [diff] [blame] | 29 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 30 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/module.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/ioport.h> |
| 34 | #include <linux/jiffies.h> |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 35 | #include <linux/platform_device.h> |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 36 | #include <linux/hwmon.h> |
Jean Delvare | 3659a01 | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 37 | #include <linux/hwmon-sysfs.h> |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 38 | #include <linux/err.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/init.h> |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 40 | #include <linux/mutex.h> |
Jean Delvare | b9acb64 | 2009-01-07 16:37:35 +0100 | [diff] [blame] | 41 | #include <linux/acpi.h> |
H Hartley Sweeten | 6055fae | 2009-09-15 17:18:13 +0200 | [diff] [blame] | 42 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Jean Delvare | 67b671b | 2007-12-06 23:13:42 +0100 | [diff] [blame] | 44 | static unsigned short force_id; |
| 45 | module_param(force_id, ushort, 0); |
| 46 | MODULE_PARM_DESC(force_id, "Override the detected device ID"); |
| 47 | |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 48 | static struct platform_device *pdev; |
| 49 | |
| 50 | #define DRVNAME "smsc47b397" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 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 | |
| 57 | static inline void superio_outb(int reg, int val) |
| 58 | { |
| 59 | outb(reg, REG); |
| 60 | outb(val, VAL); |
| 61 | } |
| 62 | |
| 63 | static inline int superio_inb(int reg) |
| 64 | { |
| 65 | outb(reg, REG); |
| 66 | return inb(VAL); |
| 67 | } |
| 68 | |
| 69 | /* select superio logical device */ |
| 70 | static inline void superio_select(int ld) |
| 71 | { |
| 72 | superio_outb(0x07, ld); |
| 73 | } |
| 74 | |
| 75 | static inline void superio_enter(void) |
| 76 | { |
| 77 | outb(0x55, REG); |
| 78 | } |
| 79 | |
| 80 | static 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 */ |
| 94 | static 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 | |
| 101 | struct smsc47b397_data { |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 102 | unsigned short addr; |
| 103 | const char *name; |
Tony Jones | 1beeffe | 2007-08-20 13:46:20 -0700 | [diff] [blame] | 104 | struct device *hwmon_dev; |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 105 | struct mutex lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 107 | struct mutex update_lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | unsigned long last_updated; /* in jiffies */ |
| 109 | int valid; |
| 110 | |
| 111 | /* register values */ |
| 112 | u16 fan[4]; |
| 113 | u8 temp[4]; |
| 114 | }; |
| 115 | |
Jean Delvare | 371f2e0 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 116 | static int smsc47b397_read_value(struct smsc47b397_data *data, u8 reg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | int res; |
| 119 | |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 120 | mutex_lock(&data->lock); |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 121 | outb(reg, data->addr); |
| 122 | res = inb_p(data->addr + 1); |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 123 | mutex_unlock(&data->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | return res; |
| 125 | } |
| 126 | |
| 127 | static struct smsc47b397_data *smsc47b397_update_device(struct device *dev) |
| 128 | { |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 129 | struct smsc47b397_data *data = dev_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | int i; |
| 131 | |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 132 | mutex_lock(&data->update_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
| 134 | if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 135 | dev_dbg(dev, "starting device update...\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
| 137 | /* 4 temperature inputs, 4 fan inputs */ |
| 138 | for (i = 0; i < 4; i++) { |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 139 | data->temp[i] = smsc47b397_read_value(data, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | SMSC47B397_REG_TEMP(i)); |
| 141 | |
| 142 | /* must read LSB first */ |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 143 | data->fan[i] = smsc47b397_read_value(data, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | SMSC47B397_REG_FAN_LSB(i)); |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 145 | data->fan[i] |= smsc47b397_read_value(data, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | SMSC47B397_REG_FAN_MSB(i)) << 8; |
| 147 | } |
| 148 | |
| 149 | data->last_updated = jiffies; |
| 150 | data->valid = 1; |
| 151 | |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 152 | dev_dbg(dev, "... device update complete\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | } |
| 154 | |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 155 | mutex_unlock(&data->update_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
| 157 | return data; |
| 158 | } |
| 159 | |
Guenter Roeck | 2a52dd6 | 2012-01-19 11:02:25 -0800 | [diff] [blame] | 160 | /* |
| 161 | * TEMP: 0.001C/bit (-128C to +127C) |
| 162 | * REG: 1C/bit, two's complement |
| 163 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | static int temp_from_reg(u8 reg) |
| 165 | { |
| 166 | return (s8)reg * 1000; |
| 167 | } |
| 168 | |
Jean Delvare | 3659a01 | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 169 | static ssize_t show_temp(struct device *dev, struct device_attribute |
| 170 | *devattr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | { |
Jean Delvare | 3659a01 | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 172 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | struct smsc47b397_data *data = smsc47b397_update_device(dev); |
Jean Delvare | 3659a01 | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 174 | return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | } |
| 176 | |
Jean Delvare | 3659a01 | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 177 | static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); |
| 178 | static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); |
| 179 | static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); |
| 180 | static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
Guenter Roeck | 2a52dd6 | 2012-01-19 11:02:25 -0800 | [diff] [blame] | 182 | /* |
| 183 | * FAN: 1 RPM/bit |
| 184 | * REG: count of 90kHz pulses / revolution |
| 185 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | static int fan_from_reg(u16 reg) |
| 187 | { |
Jean Delvare | 90205c6 | 2007-06-23 14:58:22 +0200 | [diff] [blame] | 188 | if (reg == 0 || reg == 0xffff) |
| 189 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | return 90000 * 60 / reg; |
| 191 | } |
| 192 | |
Jean Delvare | 3659a01 | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 193 | static ssize_t show_fan(struct device *dev, struct device_attribute |
| 194 | *devattr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | { |
Jean Delvare | 3659a01 | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 196 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 197 | struct smsc47b397_data *data = smsc47b397_update_device(dev); |
| 198 | return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | } |
Jean Delvare | 3659a01 | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 200 | static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0); |
| 201 | static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1); |
| 202 | static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2); |
| 203 | static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 205 | static ssize_t show_name(struct device *dev, struct device_attribute |
| 206 | *devattr, char *buf) |
| 207 | { |
| 208 | struct smsc47b397_data *data = dev_get_drvdata(dev); |
| 209 | return sprintf(buf, "%s\n", data->name); |
| 210 | } |
| 211 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); |
| 212 | |
Mark M. Hoffman | c1685f6 | 2006-09-24 20:59:49 +0200 | [diff] [blame] | 213 | static struct attribute *smsc47b397_attributes[] = { |
Jean Delvare | 3659a01 | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 214 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
| 215 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
| 216 | &sensor_dev_attr_temp3_input.dev_attr.attr, |
| 217 | &sensor_dev_attr_temp4_input.dev_attr.attr, |
| 218 | &sensor_dev_attr_fan1_input.dev_attr.attr, |
| 219 | &sensor_dev_attr_fan2_input.dev_attr.attr, |
| 220 | &sensor_dev_attr_fan3_input.dev_attr.attr, |
| 221 | &sensor_dev_attr_fan4_input.dev_attr.attr, |
Mark M. Hoffman | c1685f6 | 2006-09-24 20:59:49 +0200 | [diff] [blame] | 222 | |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 223 | &dev_attr_name.attr, |
Mark M. Hoffman | c1685f6 | 2006-09-24 20:59:49 +0200 | [diff] [blame] | 224 | NULL |
| 225 | }; |
| 226 | |
| 227 | static const struct attribute_group smsc47b397_group = { |
| 228 | .attrs = smsc47b397_attributes, |
| 229 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 231 | static int __devexit smsc47b397_remove(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | { |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 233 | struct smsc47b397_data *data = platform_get_drvdata(pdev); |
| 234 | struct resource *res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
Tony Jones | 1beeffe | 2007-08-20 13:46:20 -0700 | [diff] [blame] | 236 | hwmon_device_unregister(data->hwmon_dev); |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 237 | sysfs_remove_group(&pdev->dev.kobj, &smsc47b397_group); |
| 238 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| 239 | release_region(res->start, SMSC_EXTENT); |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 240 | kfree(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
| 242 | return 0; |
| 243 | } |
| 244 | |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 245 | static int smsc47b397_probe(struct platform_device *pdev); |
Jean Delvare | 2d8672c | 2005-07-19 23:56:35 +0200 | [diff] [blame] | 246 | |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 247 | static struct platform_driver smsc47b397_driver = { |
Laurent Riffard | cdaf793 | 2005-11-26 20:37:41 +0100 | [diff] [blame] | 248 | .driver = { |
Jean Delvare | 8721884 | 2006-09-03 22:36:14 +0200 | [diff] [blame] | 249 | .owner = THIS_MODULE, |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 250 | .name = DRVNAME, |
Laurent Riffard | cdaf793 | 2005-11-26 20:37:41 +0100 | [diff] [blame] | 251 | }, |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 252 | .probe = smsc47b397_probe, |
| 253 | .remove = __devexit_p(smsc47b397_remove), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | }; |
| 255 | |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 256 | static int __devinit smsc47b397_probe(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | { |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 258 | struct device *dev = &pdev->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | struct smsc47b397_data *data; |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 260 | struct resource *res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | int err = 0; |
| 262 | |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 263 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| 264 | if (!request_region(res->start, SMSC_EXTENT, |
Laurent Riffard | cdaf793 | 2005-11-26 20:37:41 +0100 | [diff] [blame] | 265 | smsc47b397_driver.driver.name)) { |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 266 | dev_err(dev, "Region 0x%lx-0x%lx already in use!\n", |
| 267 | (unsigned long)res->start, |
| 268 | (unsigned long)res->start + SMSC_EXTENT - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | return -EBUSY; |
| 270 | } |
| 271 | |
Jean Delvare | 371f2e0 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 272 | data = kzalloc(sizeof(struct smsc47b397_data), GFP_KERNEL); |
| 273 | if (!data) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | err = -ENOMEM; |
| 275 | goto error_release; |
| 276 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 278 | data->addr = res->start; |
| 279 | data->name = "smsc47b397"; |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 280 | mutex_init(&data->lock); |
Ingo Molnar | 9a61bf6 | 2006-01-18 23:19:26 +0100 | [diff] [blame] | 281 | mutex_init(&data->update_lock); |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 282 | platform_set_drvdata(pdev, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | |
Jean Delvare | 371f2e0 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 284 | err = sysfs_create_group(&dev->kobj, &smsc47b397_group); |
| 285 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | goto error_free; |
| 287 | |
Tony Jones | 1beeffe | 2007-08-20 13:46:20 -0700 | [diff] [blame] | 288 | data->hwmon_dev = hwmon_device_register(dev); |
| 289 | if (IS_ERR(data->hwmon_dev)) { |
| 290 | err = PTR_ERR(data->hwmon_dev); |
Mark M. Hoffman | c1685f6 | 2006-09-24 20:59:49 +0200 | [diff] [blame] | 291 | goto error_remove; |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 292 | } |
| 293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | return 0; |
| 295 | |
Mark M. Hoffman | c1685f6 | 2006-09-24 20:59:49 +0200 | [diff] [blame] | 296 | error_remove: |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 297 | sysfs_remove_group(&dev->kobj, &smsc47b397_group); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | error_free: |
Alexey Dobriyan | 1f57ff8 | 2005-08-26 01:49:14 +0400 | [diff] [blame] | 299 | kfree(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | error_release: |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 301 | release_region(res->start, SMSC_EXTENT); |
| 302 | return err; |
| 303 | } |
| 304 | |
| 305 | static int __init smsc47b397_device_add(unsigned short address) |
| 306 | { |
| 307 | struct resource res = { |
| 308 | .start = address, |
| 309 | .end = address + SMSC_EXTENT - 1, |
| 310 | .name = DRVNAME, |
| 311 | .flags = IORESOURCE_IO, |
| 312 | }; |
| 313 | int err; |
| 314 | |
Jean Delvare | b9acb64 | 2009-01-07 16:37:35 +0100 | [diff] [blame] | 315 | err = acpi_check_resource_conflict(&res); |
| 316 | if (err) |
| 317 | goto exit; |
| 318 | |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 319 | pdev = platform_device_alloc(DRVNAME, address); |
| 320 | if (!pdev) { |
| 321 | err = -ENOMEM; |
Joe Perches | bf1a85e | 2010-10-20 06:51:48 +0000 | [diff] [blame] | 322 | pr_err("Device allocation failed\n"); |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 323 | goto exit; |
| 324 | } |
| 325 | |
| 326 | err = platform_device_add_resources(pdev, &res, 1); |
| 327 | if (err) { |
Joe Perches | bf1a85e | 2010-10-20 06:51:48 +0000 | [diff] [blame] | 328 | pr_err("Device resource addition failed (%d)\n", err); |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 329 | goto exit_device_put; |
| 330 | } |
| 331 | |
| 332 | err = platform_device_add(pdev); |
| 333 | if (err) { |
Joe Perches | bf1a85e | 2010-10-20 06:51:48 +0000 | [diff] [blame] | 334 | pr_err("Device addition failed (%d)\n", err); |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 335 | goto exit_device_put; |
| 336 | } |
| 337 | |
| 338 | return 0; |
| 339 | |
| 340 | exit_device_put: |
| 341 | platform_device_put(pdev); |
| 342 | exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | return err; |
| 344 | } |
| 345 | |
Guenter Roeck | 8528e07 | 2012-03-28 08:35:26 -0700 | [diff] [blame] | 346 | static int __init smsc47b397_find(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | { |
| 348 | u8 id, rev; |
Craig Kelley | 8093077 | 2008-02-29 10:24:44 -0700 | [diff] [blame] | 349 | char *name; |
Guenter Roeck | 8528e07 | 2012-03-28 08:35:26 -0700 | [diff] [blame] | 350 | unsigned short addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
| 352 | superio_enter(); |
Jean Delvare | 67b671b | 2007-12-06 23:13:42 +0100 | [diff] [blame] | 353 | id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
Jean Delvare | 371f2e0 | 2011-11-04 12:00:47 +0100 | [diff] [blame] | 355 | switch (id) { |
Craig Kelley | 8093077 | 2008-02-29 10:24:44 -0700 | [diff] [blame] | 356 | case 0x81: |
| 357 | name = "SCH5307-NS"; |
| 358 | break; |
| 359 | case 0x6f: |
| 360 | name = "LPC47B397-NC"; |
| 361 | break; |
| 362 | case 0x85: |
| 363 | case 0x8c: |
| 364 | name = "SCH5317"; |
| 365 | break; |
| 366 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | superio_exit(); |
| 368 | return -ENODEV; |
| 369 | } |
| 370 | |
| 371 | rev = superio_inb(SUPERIO_REG_DEVREV); |
| 372 | |
| 373 | superio_select(SUPERIO_REG_LD8); |
Guenter Roeck | 8528e07 | 2012-03-28 08:35:26 -0700 | [diff] [blame] | 374 | addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | | superio_inb(SUPERIO_REG_BASE_LSB); |
| 376 | |
Joe Perches | bf1a85e | 2010-10-20 06:51:48 +0000 | [diff] [blame] | 377 | pr_info("found SMSC %s (base address 0x%04x, revision %u)\n", |
Guenter Roeck | 8528e07 | 2012-03-28 08:35:26 -0700 | [diff] [blame] | 378 | name, addr, rev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
| 380 | superio_exit(); |
Guenter Roeck | 8528e07 | 2012-03-28 08:35:26 -0700 | [diff] [blame] | 381 | return addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | static int __init smsc47b397_init(void) |
| 385 | { |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 386 | unsigned short address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | int ret; |
| 388 | |
Guenter Roeck | 8528e07 | 2012-03-28 08:35:26 -0700 | [diff] [blame] | 389 | ret = smsc47b397_find(); |
| 390 | if (ret < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | return ret; |
Guenter Roeck | 8528e07 | 2012-03-28 08:35:26 -0700 | [diff] [blame] | 392 | address = ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 394 | ret = platform_driver_register(&smsc47b397_driver); |
| 395 | if (ret) |
| 396 | goto exit; |
| 397 | |
| 398 | /* Sets global pdev as a side effect */ |
| 399 | ret = smsc47b397_device_add(address); |
| 400 | if (ret) |
| 401 | goto exit_driver; |
| 402 | |
| 403 | return 0; |
| 404 | |
| 405 | exit_driver: |
| 406 | platform_driver_unregister(&smsc47b397_driver); |
| 407 | exit: |
| 408 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | } |
| 410 | |
| 411 | static void __exit smsc47b397_exit(void) |
| 412 | { |
Jean Delvare | 292fc1a | 2007-05-08 17:22:03 +0200 | [diff] [blame] | 413 | platform_device_unregister(pdev); |
| 414 | platform_driver_unregister(&smsc47b397_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | } |
| 416 | |
| 417 | MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>"); |
| 418 | MODULE_DESCRIPTION("SMSC LPC47B397 driver"); |
| 419 | MODULE_LICENSE("GPL"); |
| 420 | |
| 421 | module_init(smsc47b397_init); |
| 422 | module_exit(smsc47b397_exit); |