Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * adm1025.c |
| 3 | * |
| 4 | * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com> |
| 5 | * Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org> |
| 6 | * |
| 7 | * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6 |
| 8 | * voltages (including its own power source) and up to two temperatures |
| 9 | * (its own plus up to one external one). Voltages are scaled internally |
| 10 | * (which is not the common way) with ratios such that the nominal value |
| 11 | * of each voltage correspond to a register value of 192 (which means a |
| 12 | * resolution of about 0.5% of the nominal value). Temperature values are |
| 13 | * reported with a 1 deg resolution and a 3 deg accuracy. Complete |
| 14 | * datasheet can be obtained from Analog's website at: |
| 15 | * http://www.analog.com/Analog_Root/productPage/productHome/0,2121,ADM1025,00.html |
| 16 | * |
| 17 | * This driver also supports the ADM1025A, which differs from the ADM1025 |
| 18 | * only in that it has "open-drain VID inputs while the ADM1025 has |
| 19 | * on-chip 100k pull-ups on the VID inputs". It doesn't make any |
| 20 | * difference for us. |
| 21 | * |
| 22 | * This driver also supports the NE1619, a sensor chip made by Philips. |
| 23 | * That chip is similar to the ADM1025A, with a few differences. The only |
| 24 | * difference that matters to us is that the NE1619 has only two possible |
| 25 | * addresses while the ADM1025A has a third one. Complete datasheet can be |
| 26 | * obtained from Philips's website at: |
| 27 | * http://www.semiconductors.philips.com/pip/NE1619DS.html |
| 28 | * |
| 29 | * Since the ADM1025 was the first chipset supported by this driver, most |
| 30 | * comments will refer to this chipset, but are actually general and |
| 31 | * concern all supported chipsets, unless mentioned otherwise. |
| 32 | * |
| 33 | * This program is free software; you can redistribute it and/or modify |
| 34 | * it under the terms of the GNU General Public License as published by |
| 35 | * the Free Software Foundation; either version 2 of the License, or |
| 36 | * (at your option) any later version. |
| 37 | * |
| 38 | * This program is distributed in the hope that it will be useful, |
| 39 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 40 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 41 | * GNU General Public License for more details. |
| 42 | * |
| 43 | * You should have received a copy of the GNU General Public License |
| 44 | * along with this program; if not, write to the Free Software |
| 45 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 46 | */ |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <linux/module.h> |
| 49 | #include <linux/init.h> |
| 50 | #include <linux/slab.h> |
| 51 | #include <linux/jiffies.h> |
| 52 | #include <linux/i2c.h> |
| 53 | #include <linux/i2c-sensor.h> |
| 54 | #include <linux/i2c-vid.h> |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 55 | #include <linux/hwmon.h> |
| 56 | #include <linux/err.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
| 58 | /* |
| 59 | * Addresses to scan |
| 60 | * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e. |
| 61 | * NE1619 has two possible addresses: 0x2c and 0x2d. |
| 62 | */ |
| 63 | |
| 64 | static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
| 66 | /* |
| 67 | * Insmod parameters |
| 68 | */ |
| 69 | |
| 70 | SENSORS_INSMOD_2(adm1025, ne1619); |
| 71 | |
| 72 | /* |
| 73 | * The ADM1025 registers |
| 74 | */ |
| 75 | |
| 76 | #define ADM1025_REG_MAN_ID 0x3E |
| 77 | #define ADM1025_REG_CHIP_ID 0x3F |
| 78 | #define ADM1025_REG_CONFIG 0x40 |
| 79 | #define ADM1025_REG_STATUS1 0x41 |
| 80 | #define ADM1025_REG_STATUS2 0x42 |
| 81 | #define ADM1025_REG_IN(nr) (0x20 + (nr)) |
| 82 | #define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2) |
| 83 | #define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2) |
| 84 | #define ADM1025_REG_TEMP(nr) (0x26 + (nr)) |
| 85 | #define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2) |
| 86 | #define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2) |
| 87 | #define ADM1025_REG_VID 0x47 |
| 88 | #define ADM1025_REG_VID4 0x49 |
| 89 | |
| 90 | /* |
| 91 | * Conversions and various macros |
| 92 | * The ADM1025 uses signed 8-bit values for temperatures. |
| 93 | */ |
| 94 | |
| 95 | static int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; |
| 96 | |
| 97 | #define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) |
| 98 | #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ |
| 99 | (val) * 192 >= (scale) * 255 ? 255 : \ |
| 100 | ((val) * 192 + (scale)/2) / (scale)) |
| 101 | |
| 102 | #define TEMP_FROM_REG(reg) ((reg) * 1000) |
| 103 | #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ |
| 104 | (val) >= 126500 ? 127 : \ |
| 105 | (((val) < 0 ? (val)-500 : (val)+500) / 1000)) |
| 106 | |
| 107 | /* |
| 108 | * Functions declaration |
| 109 | */ |
| 110 | |
| 111 | static int adm1025_attach_adapter(struct i2c_adapter *adapter); |
| 112 | static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind); |
| 113 | static void adm1025_init_client(struct i2c_client *client); |
| 114 | static int adm1025_detach_client(struct i2c_client *client); |
| 115 | static struct adm1025_data *adm1025_update_device(struct device *dev); |
| 116 | |
| 117 | /* |
| 118 | * Driver data (common to all clients) |
| 119 | */ |
| 120 | |
| 121 | static struct i2c_driver adm1025_driver = { |
| 122 | .owner = THIS_MODULE, |
| 123 | .name = "adm1025", |
| 124 | .id = I2C_DRIVERID_ADM1025, |
| 125 | .flags = I2C_DF_NOTIFY, |
| 126 | .attach_adapter = adm1025_attach_adapter, |
| 127 | .detach_client = adm1025_detach_client, |
| 128 | }; |
| 129 | |
| 130 | /* |
| 131 | * Client data (each client gets its own) |
| 132 | */ |
| 133 | |
| 134 | struct adm1025_data { |
| 135 | struct i2c_client client; |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 136 | struct class_device *class_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | struct semaphore update_lock; |
| 138 | char valid; /* zero until following fields are valid */ |
| 139 | unsigned long last_updated; /* in jiffies */ |
| 140 | |
| 141 | u8 in[6]; /* register value */ |
| 142 | u8 in_max[6]; /* register value */ |
| 143 | u8 in_min[6]; /* register value */ |
| 144 | s8 temp[2]; /* register value */ |
| 145 | s8 temp_min[2]; /* register value */ |
| 146 | s8 temp_max[2]; /* register value */ |
| 147 | u16 alarms; /* register values, combined */ |
| 148 | u8 vid; /* register values, combined */ |
| 149 | u8 vrm; |
| 150 | }; |
| 151 | |
| 152 | /* |
| 153 | * Sysfs stuff |
| 154 | */ |
| 155 | |
| 156 | #define show_in(offset) \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 157 | static ssize_t show_in##offset(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | { \ |
| 159 | struct adm1025_data *data = adm1025_update_device(dev); \ |
| 160 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in[offset], \ |
| 161 | in_scale[offset])); \ |
| 162 | } \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 163 | static ssize_t show_in##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | { \ |
| 165 | struct adm1025_data *data = adm1025_update_device(dev); \ |
| 166 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[offset], \ |
| 167 | in_scale[offset])); \ |
| 168 | } \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 169 | static ssize_t show_in##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | { \ |
| 171 | struct adm1025_data *data = adm1025_update_device(dev); \ |
| 172 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[offset], \ |
| 173 | in_scale[offset])); \ |
| 174 | } \ |
| 175 | static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in##offset, NULL); |
| 176 | show_in(0); |
| 177 | show_in(1); |
| 178 | show_in(2); |
| 179 | show_in(3); |
| 180 | show_in(4); |
| 181 | show_in(5); |
| 182 | |
| 183 | #define show_temp(offset) \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 184 | static ssize_t show_temp##offset(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | { \ |
| 186 | struct adm1025_data *data = adm1025_update_device(dev); \ |
| 187 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[offset-1])); \ |
| 188 | } \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 189 | static ssize_t show_temp##offset##_min(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { \ |
| 191 | struct adm1025_data *data = adm1025_update_device(dev); \ |
| 192 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[offset-1])); \ |
| 193 | } \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 194 | static ssize_t show_temp##offset##_max(struct device *dev, struct device_attribute *attr, char *buf) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | { \ |
| 196 | struct adm1025_data *data = adm1025_update_device(dev); \ |
| 197 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[offset-1])); \ |
| 198 | }\ |
| 199 | static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp##offset, NULL); |
| 200 | show_temp(1); |
| 201 | show_temp(2); |
| 202 | |
| 203 | #define set_in(offset) \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 204 | static ssize_t set_in##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | size_t count) \ |
| 206 | { \ |
| 207 | struct i2c_client *client = to_i2c_client(dev); \ |
| 208 | struct adm1025_data *data = i2c_get_clientdata(client); \ |
| 209 | long val = simple_strtol(buf, NULL, 10); \ |
| 210 | \ |
| 211 | down(&data->update_lock); \ |
| 212 | data->in_min[offset] = IN_TO_REG(val, in_scale[offset]); \ |
| 213 | i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(offset), \ |
| 214 | data->in_min[offset]); \ |
| 215 | up(&data->update_lock); \ |
| 216 | return count; \ |
| 217 | } \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 218 | static ssize_t set_in##offset##_max(struct device *dev, struct device_attribute *attr, const char *buf, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | size_t count) \ |
| 220 | { \ |
| 221 | struct i2c_client *client = to_i2c_client(dev); \ |
| 222 | struct adm1025_data *data = i2c_get_clientdata(client); \ |
| 223 | long val = simple_strtol(buf, NULL, 10); \ |
| 224 | \ |
| 225 | down(&data->update_lock); \ |
| 226 | data->in_max[offset] = IN_TO_REG(val, in_scale[offset]); \ |
| 227 | i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(offset), \ |
| 228 | data->in_max[offset]); \ |
| 229 | up(&data->update_lock); \ |
| 230 | return count; \ |
| 231 | } \ |
| 232 | static DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \ |
| 233 | show_in##offset##_min, set_in##offset##_min); \ |
| 234 | static DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \ |
| 235 | show_in##offset##_max, set_in##offset##_max); |
| 236 | set_in(0); |
| 237 | set_in(1); |
| 238 | set_in(2); |
| 239 | set_in(3); |
| 240 | set_in(4); |
| 241 | set_in(5); |
| 242 | |
| 243 | #define set_temp(offset) \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 244 | static ssize_t set_temp##offset##_min(struct device *dev, struct device_attribute *attr, const char *buf, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | size_t count) \ |
| 246 | { \ |
| 247 | struct i2c_client *client = to_i2c_client(dev); \ |
| 248 | struct adm1025_data *data = i2c_get_clientdata(client); \ |
| 249 | long val = simple_strtol(buf, NULL, 10); \ |
| 250 | \ |
| 251 | down(&data->update_lock); \ |
| 252 | data->temp_min[offset-1] = TEMP_TO_REG(val); \ |
| 253 | i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(offset-1), \ |
| 254 | data->temp_min[offset-1]); \ |
| 255 | up(&data->update_lock); \ |
| 256 | return count; \ |
| 257 | } \ |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 258 | static ssize_t set_temp##offset##_max(struct device *dev, struct device_attribute *attr, const char *buf, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | size_t count) \ |
| 260 | { \ |
| 261 | struct i2c_client *client = to_i2c_client(dev); \ |
| 262 | struct adm1025_data *data = i2c_get_clientdata(client); \ |
| 263 | long val = simple_strtol(buf, NULL, 10); \ |
| 264 | \ |
| 265 | down(&data->update_lock); \ |
| 266 | data->temp_max[offset-1] = TEMP_TO_REG(val); \ |
| 267 | i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(offset-1), \ |
| 268 | data->temp_max[offset-1]); \ |
| 269 | up(&data->update_lock); \ |
| 270 | return count; \ |
| 271 | } \ |
| 272 | static DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \ |
| 273 | show_temp##offset##_min, set_temp##offset##_min); \ |
| 274 | static DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \ |
| 275 | show_temp##offset##_max, set_temp##offset##_max); |
| 276 | set_temp(1); |
| 277 | set_temp(2); |
| 278 | |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 279 | static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | { |
| 281 | struct adm1025_data *data = adm1025_update_device(dev); |
| 282 | return sprintf(buf, "%u\n", data->alarms); |
| 283 | } |
| 284 | static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
| 285 | |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 286 | static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | { |
| 288 | struct adm1025_data *data = adm1025_update_device(dev); |
| 289 | return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); |
| 290 | } |
Grant Coady | 937df8d | 2005-05-12 11:59:29 +1000 | [diff] [blame] | 291 | /* in1_ref is deprecated in favour of cpu0_vid, remove after 2005-11-11 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | static DEVICE_ATTR(in1_ref, S_IRUGO, show_vid, NULL); |
Grant Coady | 937df8d | 2005-05-12 11:59:29 +1000 | [diff] [blame] | 293 | static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 295 | static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | { |
| 297 | struct adm1025_data *data = adm1025_update_device(dev); |
| 298 | return sprintf(buf, "%u\n", data->vrm); |
| 299 | } |
Yani Ioannou | 74880c0 | 2005-05-17 06:41:12 -0400 | [diff] [blame] | 300 | static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | { |
| 302 | struct i2c_client *client = to_i2c_client(dev); |
| 303 | struct adm1025_data *data = i2c_get_clientdata(client); |
| 304 | data->vrm = simple_strtoul(buf, NULL, 10); |
| 305 | return count; |
| 306 | } |
| 307 | static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); |
| 308 | |
| 309 | /* |
| 310 | * Real code |
| 311 | */ |
| 312 | |
| 313 | static int adm1025_attach_adapter(struct i2c_adapter *adapter) |
| 314 | { |
| 315 | if (!(adapter->class & I2C_CLASS_HWMON)) |
| 316 | return 0; |
| 317 | return i2c_detect(adapter, &addr_data, adm1025_detect); |
| 318 | } |
| 319 | |
| 320 | /* |
| 321 | * The following function does more than just detection. If detection |
| 322 | * succeeds, it also registers the new chip. |
| 323 | */ |
| 324 | static int adm1025_detect(struct i2c_adapter *adapter, int address, int kind) |
| 325 | { |
| 326 | struct i2c_client *new_client; |
| 327 | struct adm1025_data *data; |
| 328 | int err = 0; |
| 329 | const char *name = ""; |
| 330 | u8 config; |
| 331 | |
| 332 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| 333 | goto exit; |
| 334 | |
| 335 | if (!(data = kmalloc(sizeof(struct adm1025_data), GFP_KERNEL))) { |
| 336 | err = -ENOMEM; |
| 337 | goto exit; |
| 338 | } |
| 339 | memset(data, 0, sizeof(struct adm1025_data)); |
| 340 | |
| 341 | /* The common I2C client data is placed right before the |
| 342 | ADM1025-specific data. */ |
| 343 | new_client = &data->client; |
| 344 | i2c_set_clientdata(new_client, data); |
| 345 | new_client->addr = address; |
| 346 | new_client->adapter = adapter; |
| 347 | new_client->driver = &adm1025_driver; |
| 348 | new_client->flags = 0; |
| 349 | |
| 350 | /* |
| 351 | * Now we do the remaining detection. A negative kind means that |
| 352 | * the driver was loaded with no force parameter (default), so we |
| 353 | * must both detect and identify the chip. A zero kind means that |
| 354 | * the driver was loaded with the force parameter, the detection |
| 355 | * step shall be skipped. A positive kind means that the driver |
| 356 | * was loaded with the force parameter and a given kind of chip is |
| 357 | * requested, so both the detection and the identification steps |
| 358 | * are skipped. |
| 359 | */ |
| 360 | config = i2c_smbus_read_byte_data(new_client, ADM1025_REG_CONFIG); |
| 361 | if (kind < 0) { /* detection */ |
| 362 | if ((config & 0x80) != 0x00 |
| 363 | || (i2c_smbus_read_byte_data(new_client, |
| 364 | ADM1025_REG_STATUS1) & 0xC0) != 0x00 |
| 365 | || (i2c_smbus_read_byte_data(new_client, |
| 366 | ADM1025_REG_STATUS2) & 0xBC) != 0x00) { |
| 367 | dev_dbg(&adapter->dev, |
| 368 | "ADM1025 detection failed at 0x%02x.\n", |
| 369 | address); |
| 370 | goto exit_free; |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | if (kind <= 0) { /* identification */ |
| 375 | u8 man_id, chip_id; |
| 376 | |
| 377 | man_id = i2c_smbus_read_byte_data(new_client, |
| 378 | ADM1025_REG_MAN_ID); |
| 379 | chip_id = i2c_smbus_read_byte_data(new_client, |
| 380 | ADM1025_REG_CHIP_ID); |
| 381 | |
| 382 | if (man_id == 0x41) { /* Analog Devices */ |
| 383 | if ((chip_id & 0xF0) == 0x20) { /* ADM1025/ADM1025A */ |
| 384 | kind = adm1025; |
| 385 | } |
| 386 | } else |
| 387 | if (man_id == 0xA1) { /* Philips */ |
| 388 | if (address != 0x2E |
| 389 | && (chip_id & 0xF0) == 0x20) { /* NE1619 */ |
| 390 | kind = ne1619; |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | if (kind <= 0) { /* identification failed */ |
| 395 | dev_info(&adapter->dev, |
| 396 | "Unsupported chip (man_id=0x%02X, " |
| 397 | "chip_id=0x%02X).\n", man_id, chip_id); |
| 398 | goto exit_free; |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | if (kind == adm1025) { |
| 403 | name = "adm1025"; |
| 404 | } else if (kind == ne1619) { |
| 405 | name = "ne1619"; |
| 406 | } |
| 407 | |
| 408 | /* We can fill in the remaining client fields */ |
| 409 | strlcpy(new_client->name, name, I2C_NAME_SIZE); |
| 410 | data->valid = 0; |
| 411 | init_MUTEX(&data->update_lock); |
| 412 | |
| 413 | /* Tell the I2C layer a new client has arrived */ |
| 414 | if ((err = i2c_attach_client(new_client))) |
| 415 | goto exit_free; |
| 416 | |
| 417 | /* Initialize the ADM1025 chip */ |
| 418 | adm1025_init_client(new_client); |
| 419 | |
| 420 | /* Register sysfs hooks */ |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 421 | data->class_dev = hwmon_device_register(&new_client->dev); |
| 422 | if (IS_ERR(data->class_dev)) { |
| 423 | err = PTR_ERR(data->class_dev); |
| 424 | goto exit_detach; |
| 425 | } |
| 426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | device_create_file(&new_client->dev, &dev_attr_in0_input); |
| 428 | device_create_file(&new_client->dev, &dev_attr_in1_input); |
| 429 | device_create_file(&new_client->dev, &dev_attr_in2_input); |
| 430 | device_create_file(&new_client->dev, &dev_attr_in3_input); |
| 431 | device_create_file(&new_client->dev, &dev_attr_in5_input); |
| 432 | device_create_file(&new_client->dev, &dev_attr_in0_min); |
| 433 | device_create_file(&new_client->dev, &dev_attr_in1_min); |
| 434 | device_create_file(&new_client->dev, &dev_attr_in2_min); |
| 435 | device_create_file(&new_client->dev, &dev_attr_in3_min); |
| 436 | device_create_file(&new_client->dev, &dev_attr_in5_min); |
| 437 | device_create_file(&new_client->dev, &dev_attr_in0_max); |
| 438 | device_create_file(&new_client->dev, &dev_attr_in1_max); |
| 439 | device_create_file(&new_client->dev, &dev_attr_in2_max); |
| 440 | device_create_file(&new_client->dev, &dev_attr_in3_max); |
| 441 | device_create_file(&new_client->dev, &dev_attr_in5_max); |
| 442 | device_create_file(&new_client->dev, &dev_attr_temp1_input); |
| 443 | device_create_file(&new_client->dev, &dev_attr_temp2_input); |
| 444 | device_create_file(&new_client->dev, &dev_attr_temp1_min); |
| 445 | device_create_file(&new_client->dev, &dev_attr_temp2_min); |
| 446 | device_create_file(&new_client->dev, &dev_attr_temp1_max); |
| 447 | device_create_file(&new_client->dev, &dev_attr_temp2_max); |
| 448 | device_create_file(&new_client->dev, &dev_attr_alarms); |
Grant Coady | 937df8d | 2005-05-12 11:59:29 +1000 | [diff] [blame] | 449 | /* in1_ref is deprecated, remove after 2005-11-11 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | device_create_file(&new_client->dev, &dev_attr_in1_ref); |
Grant Coady | 937df8d | 2005-05-12 11:59:29 +1000 | [diff] [blame] | 451 | device_create_file(&new_client->dev, &dev_attr_cpu0_vid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | device_create_file(&new_client->dev, &dev_attr_vrm); |
| 453 | |
| 454 | /* Pin 11 is either in4 (+12V) or VID4 */ |
| 455 | if (!(config & 0x20)) { |
| 456 | device_create_file(&new_client->dev, &dev_attr_in4_input); |
| 457 | device_create_file(&new_client->dev, &dev_attr_in4_min); |
| 458 | device_create_file(&new_client->dev, &dev_attr_in4_max); |
| 459 | } |
| 460 | |
| 461 | return 0; |
| 462 | |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 463 | exit_detach: |
| 464 | i2c_detach_client(new_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | exit_free: |
| 466 | kfree(data); |
| 467 | exit: |
| 468 | return err; |
| 469 | } |
| 470 | |
| 471 | static void adm1025_init_client(struct i2c_client *client) |
| 472 | { |
| 473 | u8 reg; |
| 474 | struct adm1025_data *data = i2c_get_clientdata(client); |
| 475 | int i; |
| 476 | |
| 477 | data->vrm = i2c_which_vrm(); |
| 478 | |
| 479 | /* |
| 480 | * Set high limits |
| 481 | * Usually we avoid setting limits on driver init, but it happens |
| 482 | * that the ADM1025 comes with stupid default limits (all registers |
| 483 | * set to 0). In case the chip has not gone through any limit |
| 484 | * setting yet, we better set the high limits to the max so that |
| 485 | * no alarm triggers. |
| 486 | */ |
| 487 | for (i=0; i<6; i++) { |
| 488 | reg = i2c_smbus_read_byte_data(client, |
| 489 | ADM1025_REG_IN_MAX(i)); |
| 490 | if (reg == 0) |
| 491 | i2c_smbus_write_byte_data(client, |
| 492 | ADM1025_REG_IN_MAX(i), |
| 493 | 0xFF); |
| 494 | } |
| 495 | for (i=0; i<2; i++) { |
| 496 | reg = i2c_smbus_read_byte_data(client, |
| 497 | ADM1025_REG_TEMP_HIGH(i)); |
| 498 | if (reg == 0) |
| 499 | i2c_smbus_write_byte_data(client, |
| 500 | ADM1025_REG_TEMP_HIGH(i), |
| 501 | 0x7F); |
| 502 | } |
| 503 | |
| 504 | /* |
| 505 | * Start the conversions |
| 506 | */ |
| 507 | reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); |
| 508 | if (!(reg & 0x01)) |
| 509 | i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, |
| 510 | (reg&0x7E)|0x01); |
| 511 | } |
| 512 | |
| 513 | static int adm1025_detach_client(struct i2c_client *client) |
| 514 | { |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 515 | struct adm1025_data *data = i2c_get_clientdata(client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | int err; |
| 517 | |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 518 | hwmon_device_unregister(data->class_dev); |
| 519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | if ((err = i2c_detach_client(client))) { |
| 521 | dev_err(&client->dev, "Client deregistration failed, " |
| 522 | "client not detached.\n"); |
| 523 | return err; |
| 524 | } |
| 525 | |
Mark M. Hoffman | 943b083 | 2005-07-15 21:39:18 -0400 | [diff] [blame] | 526 | kfree(data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | static struct adm1025_data *adm1025_update_device(struct device *dev) |
| 531 | { |
| 532 | struct i2c_client *client = to_i2c_client(dev); |
| 533 | struct adm1025_data *data = i2c_get_clientdata(client); |
| 534 | |
| 535 | down(&data->update_lock); |
| 536 | |
| 537 | if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { |
| 538 | int i; |
| 539 | |
| 540 | dev_dbg(&client->dev, "Updating data.\n"); |
| 541 | for (i=0; i<6; i++) { |
| 542 | data->in[i] = i2c_smbus_read_byte_data(client, |
| 543 | ADM1025_REG_IN(i)); |
| 544 | data->in_min[i] = i2c_smbus_read_byte_data(client, |
| 545 | ADM1025_REG_IN_MIN(i)); |
| 546 | data->in_max[i] = i2c_smbus_read_byte_data(client, |
| 547 | ADM1025_REG_IN_MAX(i)); |
| 548 | } |
| 549 | for (i=0; i<2; i++) { |
| 550 | data->temp[i] = i2c_smbus_read_byte_data(client, |
| 551 | ADM1025_REG_TEMP(i)); |
| 552 | data->temp_min[i] = i2c_smbus_read_byte_data(client, |
| 553 | ADM1025_REG_TEMP_LOW(i)); |
| 554 | data->temp_max[i] = i2c_smbus_read_byte_data(client, |
| 555 | ADM1025_REG_TEMP_HIGH(i)); |
| 556 | } |
| 557 | data->alarms = i2c_smbus_read_byte_data(client, |
| 558 | ADM1025_REG_STATUS1) |
| 559 | | (i2c_smbus_read_byte_data(client, |
| 560 | ADM1025_REG_STATUS2) << 8); |
| 561 | data->vid = (i2c_smbus_read_byte_data(client, |
| 562 | ADM1025_REG_VID) & 0x0f) |
| 563 | | ((i2c_smbus_read_byte_data(client, |
| 564 | ADM1025_REG_VID4) & 0x01) << 4); |
| 565 | |
| 566 | data->last_updated = jiffies; |
| 567 | data->valid = 1; |
| 568 | } |
| 569 | |
| 570 | up(&data->update_lock); |
| 571 | |
| 572 | return data; |
| 573 | } |
| 574 | |
| 575 | static int __init sensors_adm1025_init(void) |
| 576 | { |
| 577 | return i2c_add_driver(&adm1025_driver); |
| 578 | } |
| 579 | |
| 580 | static void __exit sensors_adm1025_exit(void) |
| 581 | { |
| 582 | i2c_del_driver(&adm1025_driver); |
| 583 | } |
| 584 | |
| 585 | MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); |
| 586 | MODULE_DESCRIPTION("ADM1025 driver"); |
| 587 | MODULE_LICENSE("GPL"); |
| 588 | |
| 589 | module_init(sensors_adm1025_init); |
| 590 | module_exit(sensors_adm1025_exit); |