Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 1 | /* |
| 2 | * A hwmon driver for the Intel 5000 series chipset FB-DIMM AMB |
| 3 | * temperature sensors |
| 4 | * Copyright (C) 2007 IBM |
| 5 | * |
Darrick J. Wong | 5407e051 | 2013-08-26 15:42:27 -0700 | [diff] [blame] | 6 | * Author: Darrick J. Wong <darrick.wong@oracle.com> |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | */ |
| 22 | |
| 23 | #include <linux/module.h> |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 24 | #include <linux/hwmon.h> |
| 25 | #include <linux/hwmon-sysfs.h> |
| 26 | #include <linux/err.h> |
| 27 | #include <linux/mutex.h> |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 28 | #include <linux/log2.h> |
| 29 | #include <linux/pci.h> |
| 30 | #include <linux/platform_device.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 31 | #include <linux/slab.h> |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 32 | |
| 33 | #define DRVNAME "i5k_amb" |
| 34 | |
| 35 | #define I5K_REG_AMB_BASE_ADDR 0x48 |
| 36 | #define I5K_REG_AMB_LEN_ADDR 0x50 |
| 37 | #define I5K_REG_CHAN0_PRESENCE_ADDR 0x64 |
| 38 | #define I5K_REG_CHAN1_PRESENCE_ADDR 0x66 |
| 39 | |
| 40 | #define AMB_REG_TEMP_MIN_ADDR 0x80 |
| 41 | #define AMB_REG_TEMP_MID_ADDR 0x81 |
| 42 | #define AMB_REG_TEMP_MAX_ADDR 0x82 |
| 43 | #define AMB_REG_TEMP_STATUS_ADDR 0x84 |
| 44 | #define AMB_REG_TEMP_ADDR 0x85 |
| 45 | |
| 46 | #define AMB_CONFIG_SIZE 2048 |
| 47 | #define AMB_FUNC_3_OFFSET 768 |
| 48 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 49 | static unsigned long amb_reg_temp_status(unsigned int amb) |
| 50 | { |
| 51 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_STATUS_ADDR + |
| 52 | AMB_CONFIG_SIZE * amb; |
| 53 | } |
| 54 | |
| 55 | static unsigned long amb_reg_temp_min(unsigned int amb) |
| 56 | { |
| 57 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MIN_ADDR + |
| 58 | AMB_CONFIG_SIZE * amb; |
| 59 | } |
| 60 | |
| 61 | static unsigned long amb_reg_temp_mid(unsigned int amb) |
| 62 | { |
| 63 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MID_ADDR + |
| 64 | AMB_CONFIG_SIZE * amb; |
| 65 | } |
| 66 | |
| 67 | static unsigned long amb_reg_temp_max(unsigned int amb) |
| 68 | { |
| 69 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MAX_ADDR + |
| 70 | AMB_CONFIG_SIZE * amb; |
| 71 | } |
| 72 | |
| 73 | static unsigned long amb_reg_temp(unsigned int amb) |
| 74 | { |
| 75 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_ADDR + |
| 76 | AMB_CONFIG_SIZE * amb; |
| 77 | } |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 78 | |
| 79 | #define MAX_MEM_CHANNELS 4 |
| 80 | #define MAX_AMBS_PER_CHANNEL 16 |
| 81 | #define MAX_AMBS (MAX_MEM_CHANNELS * \ |
| 82 | MAX_AMBS_PER_CHANNEL) |
Darrick J. Wong | 963d96b | 2008-08-15 00:40:36 -0700 | [diff] [blame] | 83 | #define CHANNEL_SHIFT 4 |
| 84 | #define DIMM_MASK 0xF |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 85 | /* |
| 86 | * Ugly hack: For some reason the highest bit is set if there |
| 87 | * are _any_ DIMMs in the channel. Attempting to read from |
| 88 | * this "high-order" AMB results in a memory bus error, so |
| 89 | * for now we'll just ignore that top bit, even though that |
| 90 | * might prevent us from seeing the 16th DIMM in the channel. |
| 91 | */ |
| 92 | #define REAL_MAX_AMBS_PER_CHANNEL 15 |
Darrick J. Wong | 963d96b | 2008-08-15 00:40:36 -0700 | [diff] [blame] | 93 | #define KNOBS_PER_AMB 6 |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 94 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 95 | static unsigned long amb_num_from_reg(unsigned int byte_num, unsigned int bit) |
| 96 | { |
| 97 | return byte_num * MAX_AMBS_PER_CHANNEL + bit; |
| 98 | } |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 99 | |
| 100 | #define AMB_SYSFS_NAME_LEN 16 |
| 101 | struct i5k_device_attribute { |
| 102 | struct sensor_device_attribute s_attr; |
| 103 | char name[AMB_SYSFS_NAME_LEN]; |
| 104 | }; |
| 105 | |
| 106 | struct i5k_amb_data { |
| 107 | struct device *hwmon_dev; |
| 108 | |
| 109 | unsigned long amb_base; |
| 110 | unsigned long amb_len; |
| 111 | u16 amb_present[MAX_MEM_CHANNELS]; |
| 112 | void __iomem *amb_mmio; |
| 113 | struct i5k_device_attribute *attrs; |
| 114 | unsigned int num_attrs; |
| 115 | }; |
| 116 | |
Julia Lawall | 3edf03b | 2016-12-22 13:04:47 +0100 | [diff] [blame] | 117 | static ssize_t name_show(struct device *dev, struct device_attribute *devattr, |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 118 | char *buf) |
| 119 | { |
| 120 | return sprintf(buf, "%s\n", DRVNAME); |
| 121 | } |
| 122 | |
| 123 | |
Julia Lawall | 3edf03b | 2016-12-22 13:04:47 +0100 | [diff] [blame] | 124 | static DEVICE_ATTR_RO(name); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 125 | |
| 126 | static struct platform_device *amb_pdev; |
| 127 | |
| 128 | static u8 amb_read_byte(struct i5k_amb_data *data, unsigned long offset) |
| 129 | { |
| 130 | return ioread8(data->amb_mmio + offset); |
| 131 | } |
| 132 | |
| 133 | static void amb_write_byte(struct i5k_amb_data *data, unsigned long offset, |
| 134 | u8 val) |
| 135 | { |
| 136 | iowrite8(val, data->amb_mmio + offset); |
| 137 | } |
| 138 | |
| 139 | static ssize_t show_amb_alarm(struct device *dev, |
| 140 | struct device_attribute *devattr, |
| 141 | char *buf) |
| 142 | { |
| 143 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 144 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
| 145 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 146 | if (!(amb_read_byte(data, amb_reg_temp_status(attr->index)) & 0x20) && |
| 147 | (amb_read_byte(data, amb_reg_temp_status(attr->index)) & 0x8)) |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 148 | return sprintf(buf, "1\n"); |
| 149 | else |
| 150 | return sprintf(buf, "0\n"); |
| 151 | } |
| 152 | |
| 153 | static ssize_t store_amb_min(struct device *dev, |
| 154 | struct device_attribute *devattr, |
| 155 | const char *buf, |
| 156 | size_t count) |
| 157 | { |
| 158 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 159 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
Frans Meulenbroeks | 7b102ed | 2012-01-08 19:34:20 +0100 | [diff] [blame] | 160 | unsigned long temp; |
| 161 | int ret = kstrtoul(buf, 10, &temp); |
| 162 | if (ret < 0) |
| 163 | return ret; |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 164 | |
Frans Meulenbroeks | 7b102ed | 2012-01-08 19:34:20 +0100 | [diff] [blame] | 165 | temp = temp / 500; |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 166 | if (temp > 255) |
| 167 | temp = 255; |
| 168 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 169 | amb_write_byte(data, amb_reg_temp_min(attr->index), temp); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 170 | return count; |
| 171 | } |
| 172 | |
| 173 | static ssize_t store_amb_mid(struct device *dev, |
| 174 | struct device_attribute *devattr, |
| 175 | const char *buf, |
| 176 | size_t count) |
| 177 | { |
| 178 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 179 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
Frans Meulenbroeks | 7b102ed | 2012-01-08 19:34:20 +0100 | [diff] [blame] | 180 | unsigned long temp; |
| 181 | int ret = kstrtoul(buf, 10, &temp); |
| 182 | if (ret < 0) |
| 183 | return ret; |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 184 | |
Frans Meulenbroeks | 7b102ed | 2012-01-08 19:34:20 +0100 | [diff] [blame] | 185 | temp = temp / 500; |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 186 | if (temp > 255) |
| 187 | temp = 255; |
| 188 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 189 | amb_write_byte(data, amb_reg_temp_mid(attr->index), temp); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 190 | return count; |
| 191 | } |
| 192 | |
| 193 | static ssize_t store_amb_max(struct device *dev, |
| 194 | struct device_attribute *devattr, |
| 195 | const char *buf, |
| 196 | size_t count) |
| 197 | { |
| 198 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 199 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
Frans Meulenbroeks | 7b102ed | 2012-01-08 19:34:20 +0100 | [diff] [blame] | 200 | unsigned long temp; |
| 201 | int ret = kstrtoul(buf, 10, &temp); |
| 202 | if (ret < 0) |
| 203 | return ret; |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 204 | |
Frans Meulenbroeks | 7b102ed | 2012-01-08 19:34:20 +0100 | [diff] [blame] | 205 | temp = temp / 500; |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 206 | if (temp > 255) |
| 207 | temp = 255; |
| 208 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 209 | amb_write_byte(data, amb_reg_temp_max(attr->index), temp); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 210 | return count; |
| 211 | } |
| 212 | |
| 213 | static ssize_t show_amb_min(struct device *dev, |
| 214 | struct device_attribute *devattr, |
| 215 | char *buf) |
| 216 | { |
| 217 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 218 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
| 219 | return sprintf(buf, "%d\n", |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 220 | 500 * amb_read_byte(data, amb_reg_temp_min(attr->index))); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | static ssize_t show_amb_mid(struct device *dev, |
| 224 | struct device_attribute *devattr, |
| 225 | char *buf) |
| 226 | { |
| 227 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 228 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
| 229 | return sprintf(buf, "%d\n", |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 230 | 500 * amb_read_byte(data, amb_reg_temp_mid(attr->index))); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | static ssize_t show_amb_max(struct device *dev, |
| 234 | struct device_attribute *devattr, |
| 235 | char *buf) |
| 236 | { |
| 237 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 238 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
| 239 | return sprintf(buf, "%d\n", |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 240 | 500 * amb_read_byte(data, amb_reg_temp_max(attr->index))); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | static ssize_t show_amb_temp(struct device *dev, |
| 244 | struct device_attribute *devattr, |
| 245 | char *buf) |
| 246 | { |
| 247 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 248 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
| 249 | return sprintf(buf, "%d\n", |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 250 | 500 * amb_read_byte(data, amb_reg_temp(attr->index))); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 251 | } |
| 252 | |
Darrick J. Wong | 963d96b | 2008-08-15 00:40:36 -0700 | [diff] [blame] | 253 | static ssize_t show_label(struct device *dev, |
| 254 | struct device_attribute *devattr, |
| 255 | char *buf) |
| 256 | { |
| 257 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 258 | |
| 259 | return sprintf(buf, "Ch. %d DIMM %d\n", attr->index >> CHANNEL_SHIFT, |
| 260 | attr->index & DIMM_MASK); |
| 261 | } |
| 262 | |
Bill Pemberton | 6c931ae | 2012-11-19 13:22:35 -0500 | [diff] [blame] | 263 | static int i5k_amb_hwmon_init(struct platform_device *pdev) |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 264 | { |
| 265 | int i, j, k, d = 0; |
| 266 | u16 c; |
| 267 | int res = 0; |
| 268 | int num_ambs = 0; |
| 269 | struct i5k_amb_data *data = platform_get_drvdata(pdev); |
| 270 | |
| 271 | /* Count the number of AMBs found */ |
| 272 | /* ignore the high-order bit, see "Ugly hack" comment above */ |
| 273 | for (i = 0; i < MAX_MEM_CHANNELS; i++) |
| 274 | num_ambs += hweight16(data->amb_present[i] & 0x7fff); |
| 275 | |
| 276 | /* Set up sysfs stuff */ |
| 277 | data->attrs = kzalloc(sizeof(*data->attrs) * num_ambs * KNOBS_PER_AMB, |
| 278 | GFP_KERNEL); |
| 279 | if (!data->attrs) |
| 280 | return -ENOMEM; |
| 281 | data->num_attrs = 0; |
| 282 | |
| 283 | for (i = 0; i < MAX_MEM_CHANNELS; i++) { |
| 284 | c = data->amb_present[i]; |
| 285 | for (j = 0; j < REAL_MAX_AMBS_PER_CHANNEL; j++, c >>= 1) { |
| 286 | struct i5k_device_attribute *iattr; |
| 287 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 288 | k = amb_num_from_reg(i, j); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 289 | if (!(c & 0x1)) |
| 290 | continue; |
| 291 | d++; |
| 292 | |
Darrick J. Wong | 963d96b | 2008-08-15 00:40:36 -0700 | [diff] [blame] | 293 | /* sysfs label */ |
| 294 | iattr = data->attrs + data->num_attrs; |
| 295 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, |
| 296 | "temp%d_label", d); |
| 297 | iattr->s_attr.dev_attr.attr.name = iattr->name; |
| 298 | iattr->s_attr.dev_attr.attr.mode = S_IRUGO; |
| 299 | iattr->s_attr.dev_attr.show = show_label; |
| 300 | iattr->s_attr.index = k; |
KAMEZAWA Hiroyuki | 0e6c787 | 2010-06-20 09:22:31 +0200 | [diff] [blame] | 301 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
Darrick J. Wong | 963d96b | 2008-08-15 00:40:36 -0700 | [diff] [blame] | 302 | res = device_create_file(&pdev->dev, |
| 303 | &iattr->s_attr.dev_attr); |
| 304 | if (res) |
| 305 | goto exit_remove; |
| 306 | data->num_attrs++; |
| 307 | |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 308 | /* Temperature sysfs knob */ |
| 309 | iattr = data->attrs + data->num_attrs; |
| 310 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, |
| 311 | "temp%d_input", d); |
| 312 | iattr->s_attr.dev_attr.attr.name = iattr->name; |
| 313 | iattr->s_attr.dev_attr.attr.mode = S_IRUGO; |
| 314 | iattr->s_attr.dev_attr.show = show_amb_temp; |
| 315 | iattr->s_attr.index = k; |
KAMEZAWA Hiroyuki | 0e6c787 | 2010-06-20 09:22:31 +0200 | [diff] [blame] | 316 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 317 | res = device_create_file(&pdev->dev, |
| 318 | &iattr->s_attr.dev_attr); |
| 319 | if (res) |
| 320 | goto exit_remove; |
| 321 | data->num_attrs++; |
| 322 | |
| 323 | /* Temperature min sysfs knob */ |
| 324 | iattr = data->attrs + data->num_attrs; |
| 325 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, |
| 326 | "temp%d_min", d); |
| 327 | iattr->s_attr.dev_attr.attr.name = iattr->name; |
| 328 | iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO; |
| 329 | iattr->s_attr.dev_attr.show = show_amb_min; |
| 330 | iattr->s_attr.dev_attr.store = store_amb_min; |
| 331 | iattr->s_attr.index = k; |
KAMEZAWA Hiroyuki | 0e6c787 | 2010-06-20 09:22:31 +0200 | [diff] [blame] | 332 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 333 | res = device_create_file(&pdev->dev, |
| 334 | &iattr->s_attr.dev_attr); |
| 335 | if (res) |
| 336 | goto exit_remove; |
| 337 | data->num_attrs++; |
| 338 | |
| 339 | /* Temperature mid sysfs knob */ |
| 340 | iattr = data->attrs + data->num_attrs; |
| 341 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, |
| 342 | "temp%d_mid", d); |
| 343 | iattr->s_attr.dev_attr.attr.name = iattr->name; |
| 344 | iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO; |
| 345 | iattr->s_attr.dev_attr.show = show_amb_mid; |
| 346 | iattr->s_attr.dev_attr.store = store_amb_mid; |
| 347 | iattr->s_attr.index = k; |
KAMEZAWA Hiroyuki | 0e6c787 | 2010-06-20 09:22:31 +0200 | [diff] [blame] | 348 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 349 | res = device_create_file(&pdev->dev, |
| 350 | &iattr->s_attr.dev_attr); |
| 351 | if (res) |
| 352 | goto exit_remove; |
| 353 | data->num_attrs++; |
| 354 | |
| 355 | /* Temperature max sysfs knob */ |
| 356 | iattr = data->attrs + data->num_attrs; |
| 357 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, |
| 358 | "temp%d_max", d); |
| 359 | iattr->s_attr.dev_attr.attr.name = iattr->name; |
| 360 | iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO; |
| 361 | iattr->s_attr.dev_attr.show = show_amb_max; |
| 362 | iattr->s_attr.dev_attr.store = store_amb_max; |
| 363 | iattr->s_attr.index = k; |
KAMEZAWA Hiroyuki | 0e6c787 | 2010-06-20 09:22:31 +0200 | [diff] [blame] | 364 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 365 | res = device_create_file(&pdev->dev, |
| 366 | &iattr->s_attr.dev_attr); |
| 367 | if (res) |
| 368 | goto exit_remove; |
| 369 | data->num_attrs++; |
| 370 | |
| 371 | /* Temperature alarm sysfs knob */ |
| 372 | iattr = data->attrs + data->num_attrs; |
| 373 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, |
| 374 | "temp%d_alarm", d); |
| 375 | iattr->s_attr.dev_attr.attr.name = iattr->name; |
| 376 | iattr->s_attr.dev_attr.attr.mode = S_IRUGO; |
| 377 | iattr->s_attr.dev_attr.show = show_amb_alarm; |
| 378 | iattr->s_attr.index = k; |
KAMEZAWA Hiroyuki | 0e6c787 | 2010-06-20 09:22:31 +0200 | [diff] [blame] | 379 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 380 | res = device_create_file(&pdev->dev, |
| 381 | &iattr->s_attr.dev_attr); |
| 382 | if (res) |
| 383 | goto exit_remove; |
| 384 | data->num_attrs++; |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | res = device_create_file(&pdev->dev, &dev_attr_name); |
| 389 | if (res) |
| 390 | goto exit_remove; |
| 391 | |
| 392 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
| 393 | if (IS_ERR(data->hwmon_dev)) { |
| 394 | res = PTR_ERR(data->hwmon_dev); |
| 395 | goto exit_remove; |
| 396 | } |
| 397 | |
| 398 | return res; |
| 399 | |
| 400 | exit_remove: |
| 401 | device_remove_file(&pdev->dev, &dev_attr_name); |
| 402 | for (i = 0; i < data->num_attrs; i++) |
| 403 | device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr); |
| 404 | kfree(data->attrs); |
| 405 | |
| 406 | return res; |
| 407 | } |
| 408 | |
Bill Pemberton | 6c931ae | 2012-11-19 13:22:35 -0500 | [diff] [blame] | 409 | static int i5k_amb_add(void) |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 410 | { |
| 411 | int res = -ENODEV; |
| 412 | |
| 413 | /* only ever going to be one of these */ |
| 414 | amb_pdev = platform_device_alloc(DRVNAME, 0); |
| 415 | if (!amb_pdev) |
| 416 | return -ENOMEM; |
| 417 | |
| 418 | res = platform_device_add(amb_pdev); |
| 419 | if (res) |
| 420 | goto err; |
| 421 | return 0; |
| 422 | |
| 423 | err: |
| 424 | platform_device_put(amb_pdev); |
| 425 | return res; |
| 426 | } |
| 427 | |
Bill Pemberton | 6c931ae | 2012-11-19 13:22:35 -0500 | [diff] [blame] | 428 | static int i5k_find_amb_registers(struct i5k_amb_data *data, |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 429 | unsigned long devid) |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 430 | { |
| 431 | struct pci_dev *pcidev; |
| 432 | u32 val32; |
| 433 | int res = -ENODEV; |
| 434 | |
| 435 | /* Find AMB register memory space */ |
| 436 | pcidev = pci_get_device(PCI_VENDOR_ID_INTEL, |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 437 | devid, |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 438 | NULL); |
| 439 | if (!pcidev) |
| 440 | return -ENODEV; |
| 441 | |
| 442 | if (pci_read_config_dword(pcidev, I5K_REG_AMB_BASE_ADDR, &val32)) |
| 443 | goto out; |
| 444 | data->amb_base = val32; |
| 445 | |
| 446 | if (pci_read_config_dword(pcidev, I5K_REG_AMB_LEN_ADDR, &val32)) |
| 447 | goto out; |
| 448 | data->amb_len = val32; |
| 449 | |
| 450 | /* Is it big enough? */ |
| 451 | if (data->amb_len < AMB_CONFIG_SIZE * MAX_AMBS) { |
| 452 | dev_err(&pcidev->dev, "AMB region too small!\n"); |
| 453 | goto out; |
| 454 | } |
| 455 | |
| 456 | res = 0; |
| 457 | out: |
| 458 | pci_dev_put(pcidev); |
| 459 | return res; |
| 460 | } |
| 461 | |
Bill Pemberton | 6c931ae | 2012-11-19 13:22:35 -0500 | [diff] [blame] | 462 | static int i5k_channel_probe(u16 *amb_present, unsigned long dev_id) |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 463 | { |
| 464 | struct pci_dev *pcidev; |
| 465 | u16 val16; |
| 466 | int res = -ENODEV; |
| 467 | |
| 468 | /* Copy the DIMM presence map for these two channels */ |
| 469 | pcidev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_id, NULL); |
| 470 | if (!pcidev) |
| 471 | return -ENODEV; |
| 472 | |
| 473 | if (pci_read_config_word(pcidev, I5K_REG_CHAN0_PRESENCE_ADDR, &val16)) |
| 474 | goto out; |
| 475 | amb_present[0] = val16; |
| 476 | |
| 477 | if (pci_read_config_word(pcidev, I5K_REG_CHAN1_PRESENCE_ADDR, &val16)) |
| 478 | goto out; |
| 479 | amb_present[1] = val16; |
| 480 | |
| 481 | res = 0; |
| 482 | |
| 483 | out: |
| 484 | pci_dev_put(pcidev); |
| 485 | return res; |
| 486 | } |
| 487 | |
Jean Delvare | b4cb0d4 | 2011-08-23 21:04:28 -0700 | [diff] [blame] | 488 | static struct { |
| 489 | unsigned long err; |
| 490 | unsigned long fbd0; |
Bill Pemberton | a597724 | 2012-11-19 13:24:37 -0500 | [diff] [blame] | 491 | } chipset_ids[] = { |
Jean Delvare | b4cb0d4 | 2011-08-23 21:04:28 -0700 | [diff] [blame] | 492 | { PCI_DEVICE_ID_INTEL_5000_ERR, PCI_DEVICE_ID_INTEL_5000_FBD0 }, |
| 493 | { PCI_DEVICE_ID_INTEL_5400_ERR, PCI_DEVICE_ID_INTEL_5400_FBD0 }, |
| 494 | { 0, 0 } |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 495 | }; |
| 496 | |
Guenter Roeck | c48a291 | 2010-11-19 09:39:11 -0800 | [diff] [blame] | 497 | #ifdef MODULE |
Arvind Yadav | 4d3f241 | 2017-07-17 21:55:10 +0530 | [diff] [blame] | 498 | static const struct pci_device_id i5k_amb_ids[] = { |
Darrick J. Wong | 6e31eb2 | 2009-01-07 16:37:33 +0100 | [diff] [blame] | 499 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5000_ERR) }, |
| 500 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5400_ERR) }, |
| 501 | { 0, } |
| 502 | }; |
| 503 | MODULE_DEVICE_TABLE(pci, i5k_amb_ids); |
Guenter Roeck | c48a291 | 2010-11-19 09:39:11 -0800 | [diff] [blame] | 504 | #endif |
Darrick J. Wong | 6e31eb2 | 2009-01-07 16:37:33 +0100 | [diff] [blame] | 505 | |
Bill Pemberton | 6c931ae | 2012-11-19 13:22:35 -0500 | [diff] [blame] | 506 | static int i5k_amb_probe(struct platform_device *pdev) |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 507 | { |
| 508 | struct i5k_amb_data *data; |
| 509 | struct resource *reso; |
Jean Delvare | b4cb0d4 | 2011-08-23 21:04:28 -0700 | [diff] [blame] | 510 | int i, res; |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 511 | |
| 512 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 513 | if (!data) |
| 514 | return -ENOMEM; |
| 515 | |
| 516 | /* Figure out where the AMB registers live */ |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 517 | i = 0; |
| 518 | do { |
Jean Delvare | b4cb0d4 | 2011-08-23 21:04:28 -0700 | [diff] [blame] | 519 | res = i5k_find_amb_registers(data, chipset_ids[i].err); |
| 520 | if (res == 0) |
| 521 | break; |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 522 | i++; |
Jean Delvare | b4cb0d4 | 2011-08-23 21:04:28 -0700 | [diff] [blame] | 523 | } while (chipset_ids[i].err); |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 524 | |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 525 | if (res) |
| 526 | goto err; |
| 527 | |
| 528 | /* Copy the DIMM presence map for the first two channels */ |
Jean Delvare | b4cb0d4 | 2011-08-23 21:04:28 -0700 | [diff] [blame] | 529 | res = i5k_channel_probe(&data->amb_present[0], chipset_ids[i].fbd0); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 530 | if (res) |
| 531 | goto err; |
| 532 | |
| 533 | /* Copy the DIMM presence map for the optional second two channels */ |
Jean Delvare | b4cb0d4 | 2011-08-23 21:04:28 -0700 | [diff] [blame] | 534 | i5k_channel_probe(&data->amb_present[2], chipset_ids[i].fbd0 + 1); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 535 | |
| 536 | /* Set up resource regions */ |
| 537 | reso = request_mem_region(data->amb_base, data->amb_len, DRVNAME); |
| 538 | if (!reso) { |
| 539 | res = -EBUSY; |
| 540 | goto err; |
| 541 | } |
| 542 | |
| 543 | data->amb_mmio = ioremap_nocache(data->amb_base, data->amb_len); |
| 544 | if (!data->amb_mmio) { |
| 545 | res = -EBUSY; |
| 546 | goto err_map_failed; |
| 547 | } |
| 548 | |
| 549 | platform_set_drvdata(pdev, data); |
| 550 | |
| 551 | res = i5k_amb_hwmon_init(pdev); |
| 552 | if (res) |
| 553 | goto err_init_failed; |
| 554 | |
| 555 | return res; |
| 556 | |
| 557 | err_init_failed: |
| 558 | iounmap(data->amb_mmio); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 559 | err_map_failed: |
| 560 | release_mem_region(data->amb_base, data->amb_len); |
| 561 | err: |
| 562 | kfree(data); |
| 563 | return res; |
| 564 | } |
| 565 | |
Bill Pemberton | 281dfd0 | 2012-11-19 13:25:51 -0500 | [diff] [blame] | 566 | static int i5k_amb_remove(struct platform_device *pdev) |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 567 | { |
| 568 | int i; |
| 569 | struct i5k_amb_data *data = platform_get_drvdata(pdev); |
| 570 | |
| 571 | hwmon_device_unregister(data->hwmon_dev); |
| 572 | device_remove_file(&pdev->dev, &dev_attr_name); |
| 573 | for (i = 0; i < data->num_attrs; i++) |
| 574 | device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr); |
| 575 | kfree(data->attrs); |
| 576 | iounmap(data->amb_mmio); |
| 577 | release_mem_region(data->amb_base, data->amb_len); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 578 | kfree(data); |
| 579 | return 0; |
| 580 | } |
| 581 | |
| 582 | static struct platform_driver i5k_amb_driver = { |
| 583 | .driver = { |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 584 | .name = DRVNAME, |
| 585 | }, |
| 586 | .probe = i5k_amb_probe, |
Bill Pemberton | 9e5e9b7 | 2012-11-19 13:21:20 -0500 | [diff] [blame] | 587 | .remove = i5k_amb_remove, |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 588 | }; |
| 589 | |
| 590 | static int __init i5k_amb_init(void) |
| 591 | { |
| 592 | int res; |
| 593 | |
| 594 | res = platform_driver_register(&i5k_amb_driver); |
| 595 | if (res) |
| 596 | return res; |
| 597 | |
| 598 | res = i5k_amb_add(); |
| 599 | if (res) |
| 600 | platform_driver_unregister(&i5k_amb_driver); |
| 601 | |
| 602 | return res; |
| 603 | } |
| 604 | |
| 605 | static void __exit i5k_amb_exit(void) |
| 606 | { |
| 607 | platform_device_unregister(amb_pdev); |
| 608 | platform_driver_unregister(&i5k_amb_driver); |
| 609 | } |
| 610 | |
Darrick J. Wong | 5407e051 | 2013-08-26 15:42:27 -0700 | [diff] [blame] | 611 | MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>"); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 612 | MODULE_DESCRIPTION("Intel 5000 chipset FB-DIMM AMB temperature sensor"); |
| 613 | MODULE_LICENSE("GPL"); |
| 614 | |
| 615 | module_init(i5k_amb_init); |
| 616 | module_exit(i5k_amb_exit); |