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 | * |
| 6 | * Author: Darrick J. Wong <djwong@us.ibm.com> |
| 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> |
| 24 | #include <linux/jiffies.h> |
| 25 | #include <linux/hwmon.h> |
| 26 | #include <linux/hwmon-sysfs.h> |
| 27 | #include <linux/err.h> |
| 28 | #include <linux/mutex.h> |
| 29 | #include <linux/delay.h> |
| 30 | #include <linux/log2.h> |
| 31 | #include <linux/pci.h> |
| 32 | #include <linux/platform_device.h> |
| 33 | |
| 34 | #define DRVNAME "i5k_amb" |
| 35 | |
| 36 | #define I5K_REG_AMB_BASE_ADDR 0x48 |
| 37 | #define I5K_REG_AMB_LEN_ADDR 0x50 |
| 38 | #define I5K_REG_CHAN0_PRESENCE_ADDR 0x64 |
| 39 | #define I5K_REG_CHAN1_PRESENCE_ADDR 0x66 |
| 40 | |
| 41 | #define AMB_REG_TEMP_MIN_ADDR 0x80 |
| 42 | #define AMB_REG_TEMP_MID_ADDR 0x81 |
| 43 | #define AMB_REG_TEMP_MAX_ADDR 0x82 |
| 44 | #define AMB_REG_TEMP_STATUS_ADDR 0x84 |
| 45 | #define AMB_REG_TEMP_ADDR 0x85 |
| 46 | |
| 47 | #define AMB_CONFIG_SIZE 2048 |
| 48 | #define AMB_FUNC_3_OFFSET 768 |
| 49 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 50 | static unsigned long amb_reg_temp_status(unsigned int amb) |
| 51 | { |
| 52 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_STATUS_ADDR + |
| 53 | AMB_CONFIG_SIZE * amb; |
| 54 | } |
| 55 | |
| 56 | static unsigned long amb_reg_temp_min(unsigned int amb) |
| 57 | { |
| 58 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MIN_ADDR + |
| 59 | AMB_CONFIG_SIZE * amb; |
| 60 | } |
| 61 | |
| 62 | static unsigned long amb_reg_temp_mid(unsigned int amb) |
| 63 | { |
| 64 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MID_ADDR + |
| 65 | AMB_CONFIG_SIZE * amb; |
| 66 | } |
| 67 | |
| 68 | static unsigned long amb_reg_temp_max(unsigned int amb) |
| 69 | { |
| 70 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MAX_ADDR + |
| 71 | AMB_CONFIG_SIZE * amb; |
| 72 | } |
| 73 | |
| 74 | static unsigned long amb_reg_temp(unsigned int amb) |
| 75 | { |
| 76 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_ADDR + |
| 77 | AMB_CONFIG_SIZE * amb; |
| 78 | } |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 79 | |
| 80 | #define MAX_MEM_CHANNELS 4 |
| 81 | #define MAX_AMBS_PER_CHANNEL 16 |
| 82 | #define MAX_AMBS (MAX_MEM_CHANNELS * \ |
| 83 | MAX_AMBS_PER_CHANNEL) |
Darrick J. Wong | 963d96b | 2008-08-15 00:40:36 -0700 | [diff] [blame^] | 84 | #define CHANNEL_SHIFT 4 |
| 85 | #define DIMM_MASK 0xF |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 86 | /* |
| 87 | * Ugly hack: For some reason the highest bit is set if there |
| 88 | * are _any_ DIMMs in the channel. Attempting to read from |
| 89 | * this "high-order" AMB results in a memory bus error, so |
| 90 | * for now we'll just ignore that top bit, even though that |
| 91 | * might prevent us from seeing the 16th DIMM in the channel. |
| 92 | */ |
| 93 | #define REAL_MAX_AMBS_PER_CHANNEL 15 |
Darrick J. Wong | 963d96b | 2008-08-15 00:40:36 -0700 | [diff] [blame^] | 94 | #define KNOBS_PER_AMB 6 |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 95 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 96 | static unsigned long amb_num_from_reg(unsigned int byte_num, unsigned int bit) |
| 97 | { |
| 98 | return byte_num * MAX_AMBS_PER_CHANNEL + bit; |
| 99 | } |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 100 | |
| 101 | #define AMB_SYSFS_NAME_LEN 16 |
| 102 | struct i5k_device_attribute { |
| 103 | struct sensor_device_attribute s_attr; |
| 104 | char name[AMB_SYSFS_NAME_LEN]; |
| 105 | }; |
| 106 | |
| 107 | struct i5k_amb_data { |
| 108 | struct device *hwmon_dev; |
| 109 | |
| 110 | unsigned long amb_base; |
| 111 | unsigned long amb_len; |
| 112 | u16 amb_present[MAX_MEM_CHANNELS]; |
| 113 | void __iomem *amb_mmio; |
| 114 | struct i5k_device_attribute *attrs; |
| 115 | unsigned int num_attrs; |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 116 | unsigned long chipset_id; |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 117 | }; |
| 118 | |
| 119 | static ssize_t show_name(struct device *dev, struct device_attribute *devattr, |
| 120 | char *buf) |
| 121 | { |
| 122 | return sprintf(buf, "%s\n", DRVNAME); |
| 123 | } |
| 124 | |
| 125 | |
| 126 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); |
| 127 | |
| 128 | static struct platform_device *amb_pdev; |
| 129 | |
| 130 | static u8 amb_read_byte(struct i5k_amb_data *data, unsigned long offset) |
| 131 | { |
| 132 | return ioread8(data->amb_mmio + offset); |
| 133 | } |
| 134 | |
| 135 | static void amb_write_byte(struct i5k_amb_data *data, unsigned long offset, |
| 136 | u8 val) |
| 137 | { |
| 138 | iowrite8(val, data->amb_mmio + offset); |
| 139 | } |
| 140 | |
| 141 | static ssize_t show_amb_alarm(struct device *dev, |
| 142 | struct device_attribute *devattr, |
| 143 | char *buf) |
| 144 | { |
| 145 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 146 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
| 147 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 148 | if (!(amb_read_byte(data, amb_reg_temp_status(attr->index)) & 0x20) && |
| 149 | (amb_read_byte(data, amb_reg_temp_status(attr->index)) & 0x8)) |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 150 | return sprintf(buf, "1\n"); |
| 151 | else |
| 152 | return sprintf(buf, "0\n"); |
| 153 | } |
| 154 | |
| 155 | static ssize_t store_amb_min(struct device *dev, |
| 156 | struct device_attribute *devattr, |
| 157 | const char *buf, |
| 158 | size_t count) |
| 159 | { |
| 160 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 161 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
| 162 | unsigned long temp = simple_strtoul(buf, NULL, 10) / 500; |
| 163 | |
| 164 | if (temp > 255) |
| 165 | temp = 255; |
| 166 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 167 | amb_write_byte(data, amb_reg_temp_min(attr->index), temp); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 168 | return count; |
| 169 | } |
| 170 | |
| 171 | static ssize_t store_amb_mid(struct device *dev, |
| 172 | struct device_attribute *devattr, |
| 173 | const char *buf, |
| 174 | size_t count) |
| 175 | { |
| 176 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 177 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
| 178 | unsigned long temp = simple_strtoul(buf, NULL, 10) / 500; |
| 179 | |
| 180 | if (temp > 255) |
| 181 | temp = 255; |
| 182 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 183 | amb_write_byte(data, amb_reg_temp_mid(attr->index), temp); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 184 | return count; |
| 185 | } |
| 186 | |
| 187 | static ssize_t store_amb_max(struct device *dev, |
| 188 | struct device_attribute *devattr, |
| 189 | const char *buf, |
| 190 | size_t count) |
| 191 | { |
| 192 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 193 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
| 194 | unsigned long temp = simple_strtoul(buf, NULL, 10) / 500; |
| 195 | |
| 196 | if (temp > 255) |
| 197 | temp = 255; |
| 198 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 199 | amb_write_byte(data, amb_reg_temp_max(attr->index), temp); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 200 | return count; |
| 201 | } |
| 202 | |
| 203 | static ssize_t show_amb_min(struct device *dev, |
| 204 | struct device_attribute *devattr, |
| 205 | char *buf) |
| 206 | { |
| 207 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 208 | struct i5k_amb_data *data = dev_get_drvdata(dev); |
| 209 | return sprintf(buf, "%d\n", |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 210 | 500 * amb_read_byte(data, amb_reg_temp_min(attr->index))); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 211 | } |
| 212 | |
| 213 | static ssize_t show_amb_mid(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_mid(attr->index))); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | static ssize_t show_amb_max(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_max(attr->index))); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | static ssize_t show_amb_temp(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(attr->index))); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 241 | } |
| 242 | |
Darrick J. Wong | 963d96b | 2008-08-15 00:40:36 -0700 | [diff] [blame^] | 243 | static ssize_t show_label(struct device *dev, |
| 244 | struct device_attribute *devattr, |
| 245 | char *buf) |
| 246 | { |
| 247 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); |
| 248 | |
| 249 | return sprintf(buf, "Ch. %d DIMM %d\n", attr->index >> CHANNEL_SHIFT, |
| 250 | attr->index & DIMM_MASK); |
| 251 | } |
| 252 | |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 253 | static int __devinit i5k_amb_hwmon_init(struct platform_device *pdev) |
| 254 | { |
| 255 | int i, j, k, d = 0; |
| 256 | u16 c; |
| 257 | int res = 0; |
| 258 | int num_ambs = 0; |
| 259 | struct i5k_amb_data *data = platform_get_drvdata(pdev); |
| 260 | |
| 261 | /* Count the number of AMBs found */ |
| 262 | /* ignore the high-order bit, see "Ugly hack" comment above */ |
| 263 | for (i = 0; i < MAX_MEM_CHANNELS; i++) |
| 264 | num_ambs += hweight16(data->amb_present[i] & 0x7fff); |
| 265 | |
| 266 | /* Set up sysfs stuff */ |
| 267 | data->attrs = kzalloc(sizeof(*data->attrs) * num_ambs * KNOBS_PER_AMB, |
| 268 | GFP_KERNEL); |
| 269 | if (!data->attrs) |
| 270 | return -ENOMEM; |
| 271 | data->num_attrs = 0; |
| 272 | |
| 273 | for (i = 0; i < MAX_MEM_CHANNELS; i++) { |
| 274 | c = data->amb_present[i]; |
| 275 | for (j = 0; j < REAL_MAX_AMBS_PER_CHANNEL; j++, c >>= 1) { |
| 276 | struct i5k_device_attribute *iattr; |
| 277 | |
Darrick J. Wong | 59a030a | 2007-10-26 11:55:11 -0700 | [diff] [blame] | 278 | k = amb_num_from_reg(i, j); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 279 | if (!(c & 0x1)) |
| 280 | continue; |
| 281 | d++; |
| 282 | |
Darrick J. Wong | 963d96b | 2008-08-15 00:40:36 -0700 | [diff] [blame^] | 283 | /* sysfs label */ |
| 284 | iattr = data->attrs + data->num_attrs; |
| 285 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, |
| 286 | "temp%d_label", d); |
| 287 | iattr->s_attr.dev_attr.attr.name = iattr->name; |
| 288 | iattr->s_attr.dev_attr.attr.mode = S_IRUGO; |
| 289 | iattr->s_attr.dev_attr.show = show_label; |
| 290 | iattr->s_attr.index = k; |
| 291 | res = device_create_file(&pdev->dev, |
| 292 | &iattr->s_attr.dev_attr); |
| 293 | if (res) |
| 294 | goto exit_remove; |
| 295 | data->num_attrs++; |
| 296 | |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 297 | /* Temperature sysfs knob */ |
| 298 | iattr = data->attrs + data->num_attrs; |
| 299 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, |
| 300 | "temp%d_input", d); |
| 301 | iattr->s_attr.dev_attr.attr.name = iattr->name; |
| 302 | iattr->s_attr.dev_attr.attr.mode = S_IRUGO; |
| 303 | iattr->s_attr.dev_attr.show = show_amb_temp; |
| 304 | iattr->s_attr.index = k; |
| 305 | res = device_create_file(&pdev->dev, |
| 306 | &iattr->s_attr.dev_attr); |
| 307 | if (res) |
| 308 | goto exit_remove; |
| 309 | data->num_attrs++; |
| 310 | |
| 311 | /* Temperature min sysfs knob */ |
| 312 | iattr = data->attrs + data->num_attrs; |
| 313 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, |
| 314 | "temp%d_min", d); |
| 315 | iattr->s_attr.dev_attr.attr.name = iattr->name; |
| 316 | iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO; |
| 317 | iattr->s_attr.dev_attr.show = show_amb_min; |
| 318 | iattr->s_attr.dev_attr.store = store_amb_min; |
| 319 | iattr->s_attr.index = k; |
| 320 | res = device_create_file(&pdev->dev, |
| 321 | &iattr->s_attr.dev_attr); |
| 322 | if (res) |
| 323 | goto exit_remove; |
| 324 | data->num_attrs++; |
| 325 | |
| 326 | /* Temperature mid sysfs knob */ |
| 327 | iattr = data->attrs + data->num_attrs; |
| 328 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, |
| 329 | "temp%d_mid", d); |
| 330 | iattr->s_attr.dev_attr.attr.name = iattr->name; |
| 331 | iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO; |
| 332 | iattr->s_attr.dev_attr.show = show_amb_mid; |
| 333 | iattr->s_attr.dev_attr.store = store_amb_mid; |
| 334 | iattr->s_attr.index = k; |
| 335 | res = device_create_file(&pdev->dev, |
| 336 | &iattr->s_attr.dev_attr); |
| 337 | if (res) |
| 338 | goto exit_remove; |
| 339 | data->num_attrs++; |
| 340 | |
| 341 | /* Temperature max sysfs knob */ |
| 342 | iattr = data->attrs + data->num_attrs; |
| 343 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, |
| 344 | "temp%d_max", d); |
| 345 | iattr->s_attr.dev_attr.attr.name = iattr->name; |
| 346 | iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO; |
| 347 | iattr->s_attr.dev_attr.show = show_amb_max; |
| 348 | iattr->s_attr.dev_attr.store = store_amb_max; |
| 349 | iattr->s_attr.index = k; |
| 350 | res = device_create_file(&pdev->dev, |
| 351 | &iattr->s_attr.dev_attr); |
| 352 | if (res) |
| 353 | goto exit_remove; |
| 354 | data->num_attrs++; |
| 355 | |
| 356 | /* Temperature alarm sysfs knob */ |
| 357 | iattr = data->attrs + data->num_attrs; |
| 358 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, |
| 359 | "temp%d_alarm", d); |
| 360 | iattr->s_attr.dev_attr.attr.name = iattr->name; |
| 361 | iattr->s_attr.dev_attr.attr.mode = S_IRUGO; |
| 362 | iattr->s_attr.dev_attr.show = show_amb_alarm; |
| 363 | iattr->s_attr.index = k; |
| 364 | res = device_create_file(&pdev->dev, |
| 365 | &iattr->s_attr.dev_attr); |
| 366 | if (res) |
| 367 | goto exit_remove; |
| 368 | data->num_attrs++; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | res = device_create_file(&pdev->dev, &dev_attr_name); |
| 373 | if (res) |
| 374 | goto exit_remove; |
| 375 | |
| 376 | data->hwmon_dev = hwmon_device_register(&pdev->dev); |
| 377 | if (IS_ERR(data->hwmon_dev)) { |
| 378 | res = PTR_ERR(data->hwmon_dev); |
| 379 | goto exit_remove; |
| 380 | } |
| 381 | |
| 382 | return res; |
| 383 | |
| 384 | exit_remove: |
| 385 | device_remove_file(&pdev->dev, &dev_attr_name); |
| 386 | for (i = 0; i < data->num_attrs; i++) |
| 387 | device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr); |
| 388 | kfree(data->attrs); |
| 389 | |
| 390 | return res; |
| 391 | } |
| 392 | |
| 393 | static int __devinit i5k_amb_add(void) |
| 394 | { |
| 395 | int res = -ENODEV; |
| 396 | |
| 397 | /* only ever going to be one of these */ |
| 398 | amb_pdev = platform_device_alloc(DRVNAME, 0); |
| 399 | if (!amb_pdev) |
| 400 | return -ENOMEM; |
| 401 | |
| 402 | res = platform_device_add(amb_pdev); |
| 403 | if (res) |
| 404 | goto err; |
| 405 | return 0; |
| 406 | |
| 407 | err: |
| 408 | platform_device_put(amb_pdev); |
| 409 | return res; |
| 410 | } |
| 411 | |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 412 | static int __devinit i5k_find_amb_registers(struct i5k_amb_data *data, |
| 413 | unsigned long devid) |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 414 | { |
| 415 | struct pci_dev *pcidev; |
| 416 | u32 val32; |
| 417 | int res = -ENODEV; |
| 418 | |
| 419 | /* Find AMB register memory space */ |
| 420 | pcidev = pci_get_device(PCI_VENDOR_ID_INTEL, |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 421 | devid, |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 422 | NULL); |
| 423 | if (!pcidev) |
| 424 | return -ENODEV; |
| 425 | |
| 426 | if (pci_read_config_dword(pcidev, I5K_REG_AMB_BASE_ADDR, &val32)) |
| 427 | goto out; |
| 428 | data->amb_base = val32; |
| 429 | |
| 430 | if (pci_read_config_dword(pcidev, I5K_REG_AMB_LEN_ADDR, &val32)) |
| 431 | goto out; |
| 432 | data->amb_len = val32; |
| 433 | |
| 434 | /* Is it big enough? */ |
| 435 | if (data->amb_len < AMB_CONFIG_SIZE * MAX_AMBS) { |
| 436 | dev_err(&pcidev->dev, "AMB region too small!\n"); |
| 437 | goto out; |
| 438 | } |
| 439 | |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 440 | data->chipset_id = devid; |
| 441 | |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 442 | res = 0; |
| 443 | out: |
| 444 | pci_dev_put(pcidev); |
| 445 | return res; |
| 446 | } |
| 447 | |
| 448 | static int __devinit i5k_channel_probe(u16 *amb_present, unsigned long dev_id) |
| 449 | { |
| 450 | struct pci_dev *pcidev; |
| 451 | u16 val16; |
| 452 | int res = -ENODEV; |
| 453 | |
| 454 | /* Copy the DIMM presence map for these two channels */ |
| 455 | pcidev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_id, NULL); |
| 456 | if (!pcidev) |
| 457 | return -ENODEV; |
| 458 | |
| 459 | if (pci_read_config_word(pcidev, I5K_REG_CHAN0_PRESENCE_ADDR, &val16)) |
| 460 | goto out; |
| 461 | amb_present[0] = val16; |
| 462 | |
| 463 | if (pci_read_config_word(pcidev, I5K_REG_CHAN1_PRESENCE_ADDR, &val16)) |
| 464 | goto out; |
| 465 | amb_present[1] = val16; |
| 466 | |
| 467 | res = 0; |
| 468 | |
| 469 | out: |
| 470 | pci_dev_put(pcidev); |
| 471 | return res; |
| 472 | } |
| 473 | |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 474 | static unsigned long i5k_channel_pci_id(struct i5k_amb_data *data, |
| 475 | unsigned long channel) |
| 476 | { |
| 477 | switch (data->chipset_id) { |
| 478 | case PCI_DEVICE_ID_INTEL_5000_ERR: |
| 479 | return PCI_DEVICE_ID_INTEL_5000_FBD0 + channel; |
| 480 | case PCI_DEVICE_ID_INTEL_5400_ERR: |
| 481 | return PCI_DEVICE_ID_INTEL_5400_FBD0 + channel; |
| 482 | default: |
| 483 | BUG(); |
| 484 | } |
| 485 | } |
| 486 | |
| 487 | static unsigned long chipset_ids[] = { |
| 488 | PCI_DEVICE_ID_INTEL_5000_ERR, |
| 489 | PCI_DEVICE_ID_INTEL_5400_ERR, |
| 490 | 0 |
| 491 | }; |
| 492 | |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 493 | static int __devinit i5k_amb_probe(struct platform_device *pdev) |
| 494 | { |
| 495 | struct i5k_amb_data *data; |
| 496 | struct resource *reso; |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 497 | int i; |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 498 | int res = -ENODEV; |
| 499 | |
| 500 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
| 501 | if (!data) |
| 502 | return -ENOMEM; |
| 503 | |
| 504 | /* Figure out where the AMB registers live */ |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 505 | i = 0; |
| 506 | do { |
| 507 | res = i5k_find_amb_registers(data, chipset_ids[i]); |
| 508 | i++; |
| 509 | } while (res && chipset_ids[i]); |
| 510 | |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 511 | if (res) |
| 512 | goto err; |
| 513 | |
| 514 | /* Copy the DIMM presence map for the first two channels */ |
| 515 | res = i5k_channel_probe(&data->amb_present[0], |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 516 | i5k_channel_pci_id(data, 0)); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 517 | if (res) |
| 518 | goto err; |
| 519 | |
| 520 | /* Copy the DIMM presence map for the optional second two channels */ |
| 521 | i5k_channel_probe(&data->amb_present[2], |
Darrick J. Wong | b8fdaf5 | 2008-05-23 13:04:25 -0700 | [diff] [blame] | 522 | i5k_channel_pci_id(data, 1)); |
Darrick J. Wong | 298c752 | 2007-10-18 13:22:43 -0700 | [diff] [blame] | 523 | |
| 524 | /* Set up resource regions */ |
| 525 | reso = request_mem_region(data->amb_base, data->amb_len, DRVNAME); |
| 526 | if (!reso) { |
| 527 | res = -EBUSY; |
| 528 | goto err; |
| 529 | } |
| 530 | |
| 531 | data->amb_mmio = ioremap_nocache(data->amb_base, data->amb_len); |
| 532 | if (!data->amb_mmio) { |
| 533 | res = -EBUSY; |
| 534 | goto err_map_failed; |
| 535 | } |
| 536 | |
| 537 | platform_set_drvdata(pdev, data); |
| 538 | |
| 539 | res = i5k_amb_hwmon_init(pdev); |
| 540 | if (res) |
| 541 | goto err_init_failed; |
| 542 | |
| 543 | return res; |
| 544 | |
| 545 | err_init_failed: |
| 546 | iounmap(data->amb_mmio); |
| 547 | platform_set_drvdata(pdev, NULL); |
| 548 | err_map_failed: |
| 549 | release_mem_region(data->amb_base, data->amb_len); |
| 550 | err: |
| 551 | kfree(data); |
| 552 | return res; |
| 553 | } |
| 554 | |
| 555 | static int __devexit i5k_amb_remove(struct platform_device *pdev) |
| 556 | { |
| 557 | int i; |
| 558 | struct i5k_amb_data *data = platform_get_drvdata(pdev); |
| 559 | |
| 560 | hwmon_device_unregister(data->hwmon_dev); |
| 561 | device_remove_file(&pdev->dev, &dev_attr_name); |
| 562 | for (i = 0; i < data->num_attrs; i++) |
| 563 | device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr); |
| 564 | kfree(data->attrs); |
| 565 | iounmap(data->amb_mmio); |
| 566 | release_mem_region(data->amb_base, data->amb_len); |
| 567 | platform_set_drvdata(pdev, NULL); |
| 568 | kfree(data); |
| 569 | return 0; |
| 570 | } |
| 571 | |
| 572 | static struct platform_driver i5k_amb_driver = { |
| 573 | .driver = { |
| 574 | .owner = THIS_MODULE, |
| 575 | .name = DRVNAME, |
| 576 | }, |
| 577 | .probe = i5k_amb_probe, |
| 578 | .remove = __devexit_p(i5k_amb_remove), |
| 579 | }; |
| 580 | |
| 581 | static int __init i5k_amb_init(void) |
| 582 | { |
| 583 | int res; |
| 584 | |
| 585 | res = platform_driver_register(&i5k_amb_driver); |
| 586 | if (res) |
| 587 | return res; |
| 588 | |
| 589 | res = i5k_amb_add(); |
| 590 | if (res) |
| 591 | platform_driver_unregister(&i5k_amb_driver); |
| 592 | |
| 593 | return res; |
| 594 | } |
| 595 | |
| 596 | static void __exit i5k_amb_exit(void) |
| 597 | { |
| 598 | platform_device_unregister(amb_pdev); |
| 599 | platform_driver_unregister(&i5k_amb_driver); |
| 600 | } |
| 601 | |
| 602 | MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>"); |
| 603 | MODULE_DESCRIPTION("Intel 5000 chipset FB-DIMM AMB temperature sensor"); |
| 604 | MODULE_LICENSE("GPL"); |
| 605 | |
| 606 | module_init(i5k_amb_init); |
| 607 | module_exit(i5k_amb_exit); |