Commit | Line | Data |
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298c7524 DW |
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 | ||
59a030a9 DW |
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 | } | |
298c7524 DW |
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) | |
963d96b5 DW |
84 | #define CHANNEL_SHIFT 4 |
85 | #define DIMM_MASK 0xF | |
298c7524 DW |
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 | |
963d96b5 | 94 | #define KNOBS_PER_AMB 6 |
298c7524 | 95 | |
59a030a9 DW |
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 | } | |
298c7524 DW |
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; | |
b8fdaf5a | 116 | unsigned long chipset_id; |
298c7524 DW |
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 | ||
59a030a9 DW |
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)) | |
298c7524 DW |
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 | ||
59a030a9 | 167 | amb_write_byte(data, amb_reg_temp_min(attr->index), temp); |
298c7524 DW |
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 | ||
59a030a9 | 183 | amb_write_byte(data, amb_reg_temp_mid(attr->index), temp); |
298c7524 DW |
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 | ||
59a030a9 | 199 | amb_write_byte(data, amb_reg_temp_max(attr->index), temp); |
298c7524 DW |
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", | |
59a030a9 | 210 | 500 * amb_read_byte(data, amb_reg_temp_min(attr->index))); |
298c7524 DW |
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", | |
59a030a9 | 220 | 500 * amb_read_byte(data, amb_reg_temp_mid(attr->index))); |
298c7524 DW |
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", | |
59a030a9 | 230 | 500 * amb_read_byte(data, amb_reg_temp_max(attr->index))); |
298c7524 DW |
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", | |
59a030a9 | 240 | 500 * amb_read_byte(data, amb_reg_temp(attr->index))); |
298c7524 DW |
241 | } |
242 | ||
963d96b5 DW |
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 | ||
298c7524 DW |
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 | ||
59a030a9 | 278 | k = amb_num_from_reg(i, j); |
298c7524 DW |
279 | if (!(c & 0x1)) |
280 | continue; | |
281 | d++; | |
282 | ||
963d96b5 DW |
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 | ||
298c7524 DW |
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 | ||
b8fdaf5a DW |
412 | static int __devinit i5k_find_amb_registers(struct i5k_amb_data *data, |
413 | unsigned long devid) | |
298c7524 DW |
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, | |
b8fdaf5a | 421 | devid, |
298c7524 DW |
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 | ||
b8fdaf5a DW |
440 | data->chipset_id = devid; |
441 | ||
298c7524 DW |
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 | ||
b8fdaf5a DW |
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 | ||
298c7524 DW |
493 | static int __devinit i5k_amb_probe(struct platform_device *pdev) |
494 | { | |
495 | struct i5k_amb_data *data; | |
496 | struct resource *reso; | |
b8fdaf5a | 497 | int i; |
298c7524 DW |
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 */ | |
b8fdaf5a DW |
505 | i = 0; |
506 | do { | |
507 | res = i5k_find_amb_registers(data, chipset_ids[i]); | |
508 | i++; | |
509 | } while (res && chipset_ids[i]); | |
510 | ||
298c7524 DW |
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], | |
b8fdaf5a | 516 | i5k_channel_pci_id(data, 0)); |
298c7524 DW |
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], | |
b8fdaf5a | 522 | i5k_channel_pci_id(data, 1)); |
298c7524 DW |
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); |