blob: b87c2ccee06b39196b1be67ea43cacbf8066e499 [file] [log] [blame]
Darrick J. Wong298c7522007-10-18 13:22:43 -07001/*
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>
Darrick J. Wong298c7522007-10-18 13:22:43 -070024#include <linux/hwmon.h>
25#include <linux/hwmon-sysfs.h>
26#include <linux/err.h>
27#include <linux/mutex.h>
Darrick J. Wong298c7522007-10-18 13:22:43 -070028#include <linux/log2.h>
29#include <linux/pci.h>
30#include <linux/platform_device.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090031#include <linux/slab.h>
Darrick J. Wong298c7522007-10-18 13:22:43 -070032
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. Wong59a030a2007-10-26 11:55:11 -070049static 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
55static 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
61static 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
67static 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
73static 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. Wong298c7522007-10-18 13:22:43 -070078
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. Wong963d96b2008-08-15 00:40:36 -070083#define CHANNEL_SHIFT 4
84#define DIMM_MASK 0xF
Darrick J. Wong298c7522007-10-18 13:22:43 -070085/*
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. Wong963d96b2008-08-15 00:40:36 -070093#define KNOBS_PER_AMB 6
Darrick J. Wong298c7522007-10-18 13:22:43 -070094
Darrick J. Wong59a030a2007-10-26 11:55:11 -070095static 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. Wong298c7522007-10-18 13:22:43 -070099
100#define AMB_SYSFS_NAME_LEN 16
101struct i5k_device_attribute {
102 struct sensor_device_attribute s_attr;
103 char name[AMB_SYSFS_NAME_LEN];
104};
105
106struct 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
117static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
118 char *buf)
119{
120 return sprintf(buf, "%s\n", DRVNAME);
121}
122
123
124static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
125
126static struct platform_device *amb_pdev;
127
128static u8 amb_read_byte(struct i5k_amb_data *data, unsigned long offset)
129{
130 return ioread8(data->amb_mmio + offset);
131}
132
133static 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
139static 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. Wong59a030a2007-10-26 11:55:11 -0700146 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. Wong298c7522007-10-18 13:22:43 -0700148 return sprintf(buf, "1\n");
149 else
150 return sprintf(buf, "0\n");
151}
152
153static 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 Meulenbroeks7b102ed2012-01-08 19:34:20 +0100160 unsigned long temp;
161 int ret = kstrtoul(buf, 10, &temp);
162 if (ret < 0)
163 return ret;
Darrick J. Wong298c7522007-10-18 13:22:43 -0700164
Frans Meulenbroeks7b102ed2012-01-08 19:34:20 +0100165 temp = temp / 500;
Darrick J. Wong298c7522007-10-18 13:22:43 -0700166 if (temp > 255)
167 temp = 255;
168
Darrick J. Wong59a030a2007-10-26 11:55:11 -0700169 amb_write_byte(data, amb_reg_temp_min(attr->index), temp);
Darrick J. Wong298c7522007-10-18 13:22:43 -0700170 return count;
171}
172
173static 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 Meulenbroeks7b102ed2012-01-08 19:34:20 +0100180 unsigned long temp;
181 int ret = kstrtoul(buf, 10, &temp);
182 if (ret < 0)
183 return ret;
Darrick J. Wong298c7522007-10-18 13:22:43 -0700184
Frans Meulenbroeks7b102ed2012-01-08 19:34:20 +0100185 temp = temp / 500;
Darrick J. Wong298c7522007-10-18 13:22:43 -0700186 if (temp > 255)
187 temp = 255;
188
Darrick J. Wong59a030a2007-10-26 11:55:11 -0700189 amb_write_byte(data, amb_reg_temp_mid(attr->index), temp);
Darrick J. Wong298c7522007-10-18 13:22:43 -0700190 return count;
191}
192
193static 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 Meulenbroeks7b102ed2012-01-08 19:34:20 +0100200 unsigned long temp;
201 int ret = kstrtoul(buf, 10, &temp);
202 if (ret < 0)
203 return ret;
Darrick J. Wong298c7522007-10-18 13:22:43 -0700204
Frans Meulenbroeks7b102ed2012-01-08 19:34:20 +0100205 temp = temp / 500;
Darrick J. Wong298c7522007-10-18 13:22:43 -0700206 if (temp > 255)
207 temp = 255;
208
Darrick J. Wong59a030a2007-10-26 11:55:11 -0700209 amb_write_byte(data, amb_reg_temp_max(attr->index), temp);
Darrick J. Wong298c7522007-10-18 13:22:43 -0700210 return count;
211}
212
213static 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. Wong59a030a2007-10-26 11:55:11 -0700220 500 * amb_read_byte(data, amb_reg_temp_min(attr->index)));
Darrick J. Wong298c7522007-10-18 13:22:43 -0700221}
222
223static 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. Wong59a030a2007-10-26 11:55:11 -0700230 500 * amb_read_byte(data, amb_reg_temp_mid(attr->index)));
Darrick J. Wong298c7522007-10-18 13:22:43 -0700231}
232
233static 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. Wong59a030a2007-10-26 11:55:11 -0700240 500 * amb_read_byte(data, amb_reg_temp_max(attr->index)));
Darrick J. Wong298c7522007-10-18 13:22:43 -0700241}
242
243static 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. Wong59a030a2007-10-26 11:55:11 -0700250 500 * amb_read_byte(data, amb_reg_temp(attr->index)));
Darrick J. Wong298c7522007-10-18 13:22:43 -0700251}
252
Darrick J. Wong963d96b2008-08-15 00:40:36 -0700253static 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 Pemberton6c931ae2012-11-19 13:22:35 -0500263static int i5k_amb_hwmon_init(struct platform_device *pdev)
Darrick J. Wong298c7522007-10-18 13:22:43 -0700264{
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. Wong59a030a2007-10-26 11:55:11 -0700288 k = amb_num_from_reg(i, j);
Darrick J. Wong298c7522007-10-18 13:22:43 -0700289 if (!(c & 0x1))
290 continue;
291 d++;
292
Darrick J. Wong963d96b2008-08-15 00:40:36 -0700293 /* 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 Hiroyuki0e6c7872010-06-20 09:22:31 +0200301 sysfs_attr_init(&iattr->s_attr.dev_attr.attr);
Darrick J. Wong963d96b2008-08-15 00:40:36 -0700302 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. Wong298c7522007-10-18 13:22:43 -0700308 /* 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 Hiroyuki0e6c7872010-06-20 09:22:31 +0200316 sysfs_attr_init(&iattr->s_attr.dev_attr.attr);
Darrick J. Wong298c7522007-10-18 13:22:43 -0700317 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 Hiroyuki0e6c7872010-06-20 09:22:31 +0200332 sysfs_attr_init(&iattr->s_attr.dev_attr.attr);
Darrick J. Wong298c7522007-10-18 13:22:43 -0700333 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 Hiroyuki0e6c7872010-06-20 09:22:31 +0200348 sysfs_attr_init(&iattr->s_attr.dev_attr.attr);
Darrick J. Wong298c7522007-10-18 13:22:43 -0700349 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 Hiroyuki0e6c7872010-06-20 09:22:31 +0200364 sysfs_attr_init(&iattr->s_attr.dev_attr.attr);
Darrick J. Wong298c7522007-10-18 13:22:43 -0700365 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 Hiroyuki0e6c7872010-06-20 09:22:31 +0200379 sysfs_attr_init(&iattr->s_attr.dev_attr.attr);
Darrick J. Wong298c7522007-10-18 13:22:43 -0700380 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
400exit_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 Pemberton6c931ae2012-11-19 13:22:35 -0500409static int i5k_amb_add(void)
Darrick J. Wong298c7522007-10-18 13:22:43 -0700410{
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
423err:
424 platform_device_put(amb_pdev);
425 return res;
426}
427
Bill Pemberton6c931ae2012-11-19 13:22:35 -0500428static int i5k_find_amb_registers(struct i5k_amb_data *data,
Darrick J. Wongb8fdaf52008-05-23 13:04:25 -0700429 unsigned long devid)
Darrick J. Wong298c7522007-10-18 13:22:43 -0700430{
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. Wongb8fdaf52008-05-23 13:04:25 -0700437 devid,
Darrick J. Wong298c7522007-10-18 13:22:43 -0700438 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;
457out:
458 pci_dev_put(pcidev);
459 return res;
460}
461
Bill Pemberton6c931ae2012-11-19 13:22:35 -0500462static int i5k_channel_probe(u16 *amb_present, unsigned long dev_id)
Darrick J. Wong298c7522007-10-18 13:22:43 -0700463{
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
483out:
484 pci_dev_put(pcidev);
485 return res;
486}
487
Jean Delvareb4cb0d42011-08-23 21:04:28 -0700488static struct {
489 unsigned long err;
490 unsigned long fbd0;
Bill Pembertona5977242012-11-19 13:24:37 -0500491} chipset_ids[] = {
Jean Delvareb4cb0d42011-08-23 21:04:28 -0700492 { 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. Wongb8fdaf52008-05-23 13:04:25 -0700495};
496
Guenter Roeckc48a2912010-11-19 09:39:11 -0800497#ifdef MODULE
Bill Pembertona5977242012-11-19 13:24:37 -0500498static struct pci_device_id i5k_amb_ids[] = {
Darrick J. Wong6e31eb22009-01-07 16:37:33 +0100499 { 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};
503MODULE_DEVICE_TABLE(pci, i5k_amb_ids);
Guenter Roeckc48a2912010-11-19 09:39:11 -0800504#endif
Darrick J. Wong6e31eb22009-01-07 16:37:33 +0100505
Bill Pemberton6c931ae2012-11-19 13:22:35 -0500506static int i5k_amb_probe(struct platform_device *pdev)
Darrick J. Wong298c7522007-10-18 13:22:43 -0700507{
508 struct i5k_amb_data *data;
509 struct resource *reso;
Jean Delvareb4cb0d42011-08-23 21:04:28 -0700510 int i, res;
Darrick J. Wong298c7522007-10-18 13:22:43 -0700511
512 data = kzalloc(sizeof(*data), GFP_KERNEL);
513 if (!data)
514 return -ENOMEM;
515
516 /* Figure out where the AMB registers live */
Darrick J. Wongb8fdaf52008-05-23 13:04:25 -0700517 i = 0;
518 do {
Jean Delvareb4cb0d42011-08-23 21:04:28 -0700519 res = i5k_find_amb_registers(data, chipset_ids[i].err);
520 if (res == 0)
521 break;
Darrick J. Wongb8fdaf52008-05-23 13:04:25 -0700522 i++;
Jean Delvareb4cb0d42011-08-23 21:04:28 -0700523 } while (chipset_ids[i].err);
Darrick J. Wongb8fdaf52008-05-23 13:04:25 -0700524
Darrick J. Wong298c7522007-10-18 13:22:43 -0700525 if (res)
526 goto err;
527
528 /* Copy the DIMM presence map for the first two channels */
Jean Delvareb4cb0d42011-08-23 21:04:28 -0700529 res = i5k_channel_probe(&data->amb_present[0], chipset_ids[i].fbd0);
Darrick J. Wong298c7522007-10-18 13:22:43 -0700530 if (res)
531 goto err;
532
533 /* Copy the DIMM presence map for the optional second two channels */
Jean Delvareb4cb0d42011-08-23 21:04:28 -0700534 i5k_channel_probe(&data->amb_present[2], chipset_ids[i].fbd0 + 1);
Darrick J. Wong298c7522007-10-18 13:22:43 -0700535
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
557err_init_failed:
558 iounmap(data->amb_mmio);
559 platform_set_drvdata(pdev, NULL);
560err_map_failed:
561 release_mem_region(data->amb_base, data->amb_len);
562err:
563 kfree(data);
564 return res;
565}
566
Bill Pemberton281dfd02012-11-19 13:25:51 -0500567static int i5k_amb_remove(struct platform_device *pdev)
Darrick J. Wong298c7522007-10-18 13:22:43 -0700568{
569 int i;
570 struct i5k_amb_data *data = platform_get_drvdata(pdev);
571
572 hwmon_device_unregister(data->hwmon_dev);
573 device_remove_file(&pdev->dev, &dev_attr_name);
574 for (i = 0; i < data->num_attrs; i++)
575 device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr);
576 kfree(data->attrs);
577 iounmap(data->amb_mmio);
578 release_mem_region(data->amb_base, data->amb_len);
579 platform_set_drvdata(pdev, NULL);
580 kfree(data);
581 return 0;
582}
583
584static struct platform_driver i5k_amb_driver = {
585 .driver = {
586 .owner = THIS_MODULE,
587 .name = DRVNAME,
588 },
589 .probe = i5k_amb_probe,
Bill Pemberton9e5e9b72012-11-19 13:21:20 -0500590 .remove = i5k_amb_remove,
Darrick J. Wong298c7522007-10-18 13:22:43 -0700591};
592
593static int __init i5k_amb_init(void)
594{
595 int res;
596
597 res = platform_driver_register(&i5k_amb_driver);
598 if (res)
599 return res;
600
601 res = i5k_amb_add();
602 if (res)
603 platform_driver_unregister(&i5k_amb_driver);
604
605 return res;
606}
607
608static void __exit i5k_amb_exit(void)
609{
610 platform_device_unregister(amb_pdev);
611 platform_driver_unregister(&i5k_amb_driver);
612}
613
614MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
615MODULE_DESCRIPTION("Intel 5000 chipset FB-DIMM AMB temperature sensor");
616MODULE_LICENSE("GPL");
617
618module_init(i5k_amb_init);
619module_exit(i5k_amb_exit);