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> | |
5a0e3ad6 | 33 | #include <linux/slab.h> |
298c7524 DW |
34 | |
35 | #define DRVNAME "i5k_amb" | |
36 | ||
37 | #define I5K_REG_AMB_BASE_ADDR 0x48 | |
38 | #define I5K_REG_AMB_LEN_ADDR 0x50 | |
39 | #define I5K_REG_CHAN0_PRESENCE_ADDR 0x64 | |
40 | #define I5K_REG_CHAN1_PRESENCE_ADDR 0x66 | |
41 | ||
42 | #define AMB_REG_TEMP_MIN_ADDR 0x80 | |
43 | #define AMB_REG_TEMP_MID_ADDR 0x81 | |
44 | #define AMB_REG_TEMP_MAX_ADDR 0x82 | |
45 | #define AMB_REG_TEMP_STATUS_ADDR 0x84 | |
46 | #define AMB_REG_TEMP_ADDR 0x85 | |
47 | ||
48 | #define AMB_CONFIG_SIZE 2048 | |
49 | #define AMB_FUNC_3_OFFSET 768 | |
50 | ||
59a030a9 DW |
51 | static unsigned long amb_reg_temp_status(unsigned int amb) |
52 | { | |
53 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_STATUS_ADDR + | |
54 | AMB_CONFIG_SIZE * amb; | |
55 | } | |
56 | ||
57 | static unsigned long amb_reg_temp_min(unsigned int amb) | |
58 | { | |
59 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MIN_ADDR + | |
60 | AMB_CONFIG_SIZE * amb; | |
61 | } | |
62 | ||
63 | static unsigned long amb_reg_temp_mid(unsigned int amb) | |
64 | { | |
65 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MID_ADDR + | |
66 | AMB_CONFIG_SIZE * amb; | |
67 | } | |
68 | ||
69 | static unsigned long amb_reg_temp_max(unsigned int amb) | |
70 | { | |
71 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MAX_ADDR + | |
72 | AMB_CONFIG_SIZE * amb; | |
73 | } | |
74 | ||
75 | static unsigned long amb_reg_temp(unsigned int amb) | |
76 | { | |
77 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_ADDR + | |
78 | AMB_CONFIG_SIZE * amb; | |
79 | } | |
298c7524 DW |
80 | |
81 | #define MAX_MEM_CHANNELS 4 | |
82 | #define MAX_AMBS_PER_CHANNEL 16 | |
83 | #define MAX_AMBS (MAX_MEM_CHANNELS * \ | |
84 | MAX_AMBS_PER_CHANNEL) | |
963d96b5 DW |
85 | #define CHANNEL_SHIFT 4 |
86 | #define DIMM_MASK 0xF | |
298c7524 DW |
87 | /* |
88 | * Ugly hack: For some reason the highest bit is set if there | |
89 | * are _any_ DIMMs in the channel. Attempting to read from | |
90 | * this "high-order" AMB results in a memory bus error, so | |
91 | * for now we'll just ignore that top bit, even though that | |
92 | * might prevent us from seeing the 16th DIMM in the channel. | |
93 | */ | |
94 | #define REAL_MAX_AMBS_PER_CHANNEL 15 | |
963d96b5 | 95 | #define KNOBS_PER_AMB 6 |
298c7524 | 96 | |
59a030a9 DW |
97 | static unsigned long amb_num_from_reg(unsigned int byte_num, unsigned int bit) |
98 | { | |
99 | return byte_num * MAX_AMBS_PER_CHANNEL + bit; | |
100 | } | |
298c7524 DW |
101 | |
102 | #define AMB_SYSFS_NAME_LEN 16 | |
103 | struct i5k_device_attribute { | |
104 | struct sensor_device_attribute s_attr; | |
105 | char name[AMB_SYSFS_NAME_LEN]; | |
106 | }; | |
107 | ||
108 | struct i5k_amb_data { | |
109 | struct device *hwmon_dev; | |
110 | ||
111 | unsigned long amb_base; | |
112 | unsigned long amb_len; | |
113 | u16 amb_present[MAX_MEM_CHANNELS]; | |
114 | void __iomem *amb_mmio; | |
115 | struct i5k_device_attribute *attrs; | |
116 | unsigned int num_attrs; | |
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; | |
0e6c7870 | 291 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
963d96b5 DW |
292 | res = device_create_file(&pdev->dev, |
293 | &iattr->s_attr.dev_attr); | |
294 | if (res) | |
295 | goto exit_remove; | |
296 | data->num_attrs++; | |
297 | ||
298c7524 DW |
298 | /* Temperature sysfs knob */ |
299 | iattr = data->attrs + data->num_attrs; | |
300 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
301 | "temp%d_input", d); | |
302 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
303 | iattr->s_attr.dev_attr.attr.mode = S_IRUGO; | |
304 | iattr->s_attr.dev_attr.show = show_amb_temp; | |
305 | iattr->s_attr.index = k; | |
0e6c7870 | 306 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
307 | res = device_create_file(&pdev->dev, |
308 | &iattr->s_attr.dev_attr); | |
309 | if (res) | |
310 | goto exit_remove; | |
311 | data->num_attrs++; | |
312 | ||
313 | /* Temperature min sysfs knob */ | |
314 | iattr = data->attrs + data->num_attrs; | |
315 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
316 | "temp%d_min", d); | |
317 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
318 | iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO; | |
319 | iattr->s_attr.dev_attr.show = show_amb_min; | |
320 | iattr->s_attr.dev_attr.store = store_amb_min; | |
321 | iattr->s_attr.index = k; | |
0e6c7870 | 322 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
323 | res = device_create_file(&pdev->dev, |
324 | &iattr->s_attr.dev_attr); | |
325 | if (res) | |
326 | goto exit_remove; | |
327 | data->num_attrs++; | |
328 | ||
329 | /* Temperature mid sysfs knob */ | |
330 | iattr = data->attrs + data->num_attrs; | |
331 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
332 | "temp%d_mid", d); | |
333 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
334 | iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO; | |
335 | iattr->s_attr.dev_attr.show = show_amb_mid; | |
336 | iattr->s_attr.dev_attr.store = store_amb_mid; | |
337 | iattr->s_attr.index = k; | |
0e6c7870 | 338 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
339 | res = device_create_file(&pdev->dev, |
340 | &iattr->s_attr.dev_attr); | |
341 | if (res) | |
342 | goto exit_remove; | |
343 | data->num_attrs++; | |
344 | ||
345 | /* Temperature max sysfs knob */ | |
346 | iattr = data->attrs + data->num_attrs; | |
347 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
348 | "temp%d_max", d); | |
349 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
350 | iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO; | |
351 | iattr->s_attr.dev_attr.show = show_amb_max; | |
352 | iattr->s_attr.dev_attr.store = store_amb_max; | |
353 | iattr->s_attr.index = k; | |
0e6c7870 | 354 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
355 | res = device_create_file(&pdev->dev, |
356 | &iattr->s_attr.dev_attr); | |
357 | if (res) | |
358 | goto exit_remove; | |
359 | data->num_attrs++; | |
360 | ||
361 | /* Temperature alarm sysfs knob */ | |
362 | iattr = data->attrs + data->num_attrs; | |
363 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
364 | "temp%d_alarm", d); | |
365 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
366 | iattr->s_attr.dev_attr.attr.mode = S_IRUGO; | |
367 | iattr->s_attr.dev_attr.show = show_amb_alarm; | |
368 | iattr->s_attr.index = k; | |
0e6c7870 | 369 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
370 | res = device_create_file(&pdev->dev, |
371 | &iattr->s_attr.dev_attr); | |
372 | if (res) | |
373 | goto exit_remove; | |
374 | data->num_attrs++; | |
375 | } | |
376 | } | |
377 | ||
378 | res = device_create_file(&pdev->dev, &dev_attr_name); | |
379 | if (res) | |
380 | goto exit_remove; | |
381 | ||
382 | data->hwmon_dev = hwmon_device_register(&pdev->dev); | |
383 | if (IS_ERR(data->hwmon_dev)) { | |
384 | res = PTR_ERR(data->hwmon_dev); | |
385 | goto exit_remove; | |
386 | } | |
387 | ||
388 | return res; | |
389 | ||
390 | exit_remove: | |
391 | device_remove_file(&pdev->dev, &dev_attr_name); | |
392 | for (i = 0; i < data->num_attrs; i++) | |
393 | device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr); | |
394 | kfree(data->attrs); | |
395 | ||
396 | return res; | |
397 | } | |
398 | ||
399 | static int __devinit i5k_amb_add(void) | |
400 | { | |
401 | int res = -ENODEV; | |
402 | ||
403 | /* only ever going to be one of these */ | |
404 | amb_pdev = platform_device_alloc(DRVNAME, 0); | |
405 | if (!amb_pdev) | |
406 | return -ENOMEM; | |
407 | ||
408 | res = platform_device_add(amb_pdev); | |
409 | if (res) | |
410 | goto err; | |
411 | return 0; | |
412 | ||
413 | err: | |
414 | platform_device_put(amb_pdev); | |
415 | return res; | |
416 | } | |
417 | ||
b8fdaf5a DW |
418 | static int __devinit i5k_find_amb_registers(struct i5k_amb_data *data, |
419 | unsigned long devid) | |
298c7524 DW |
420 | { |
421 | struct pci_dev *pcidev; | |
422 | u32 val32; | |
423 | int res = -ENODEV; | |
424 | ||
425 | /* Find AMB register memory space */ | |
426 | pcidev = pci_get_device(PCI_VENDOR_ID_INTEL, | |
b8fdaf5a | 427 | devid, |
298c7524 DW |
428 | NULL); |
429 | if (!pcidev) | |
430 | return -ENODEV; | |
431 | ||
432 | if (pci_read_config_dword(pcidev, I5K_REG_AMB_BASE_ADDR, &val32)) | |
433 | goto out; | |
434 | data->amb_base = val32; | |
435 | ||
436 | if (pci_read_config_dword(pcidev, I5K_REG_AMB_LEN_ADDR, &val32)) | |
437 | goto out; | |
438 | data->amb_len = val32; | |
439 | ||
440 | /* Is it big enough? */ | |
441 | if (data->amb_len < AMB_CONFIG_SIZE * MAX_AMBS) { | |
442 | dev_err(&pcidev->dev, "AMB region too small!\n"); | |
443 | goto out; | |
444 | } | |
445 | ||
446 | res = 0; | |
447 | out: | |
448 | pci_dev_put(pcidev); | |
449 | return res; | |
450 | } | |
451 | ||
452 | static int __devinit i5k_channel_probe(u16 *amb_present, unsigned long dev_id) | |
453 | { | |
454 | struct pci_dev *pcidev; | |
455 | u16 val16; | |
456 | int res = -ENODEV; | |
457 | ||
458 | /* Copy the DIMM presence map for these two channels */ | |
459 | pcidev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_id, NULL); | |
460 | if (!pcidev) | |
461 | return -ENODEV; | |
462 | ||
463 | if (pci_read_config_word(pcidev, I5K_REG_CHAN0_PRESENCE_ADDR, &val16)) | |
464 | goto out; | |
465 | amb_present[0] = val16; | |
466 | ||
467 | if (pci_read_config_word(pcidev, I5K_REG_CHAN1_PRESENCE_ADDR, &val16)) | |
468 | goto out; | |
469 | amb_present[1] = val16; | |
470 | ||
471 | res = 0; | |
472 | ||
473 | out: | |
474 | pci_dev_put(pcidev); | |
475 | return res; | |
476 | } | |
477 | ||
b4cb0d4d JD |
478 | static struct { |
479 | unsigned long err; | |
480 | unsigned long fbd0; | |
481 | } chipset_ids[] __devinitdata = { | |
482 | { PCI_DEVICE_ID_INTEL_5000_ERR, PCI_DEVICE_ID_INTEL_5000_FBD0 }, | |
483 | { PCI_DEVICE_ID_INTEL_5400_ERR, PCI_DEVICE_ID_INTEL_5400_FBD0 }, | |
484 | { 0, 0 } | |
b8fdaf5a DW |
485 | }; |
486 | ||
c48a2916 | 487 | #ifdef MODULE |
6e31eb2b DW |
488 | static struct pci_device_id i5k_amb_ids[] __devinitdata = { |
489 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5000_ERR) }, | |
490 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5400_ERR) }, | |
491 | { 0, } | |
492 | }; | |
493 | MODULE_DEVICE_TABLE(pci, i5k_amb_ids); | |
c48a2916 | 494 | #endif |
6e31eb2b | 495 | |
298c7524 DW |
496 | static int __devinit i5k_amb_probe(struct platform_device *pdev) |
497 | { | |
498 | struct i5k_amb_data *data; | |
499 | struct resource *reso; | |
b4cb0d4d | 500 | int i, res; |
298c7524 DW |
501 | |
502 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
503 | if (!data) | |
504 | return -ENOMEM; | |
505 | ||
506 | /* Figure out where the AMB registers live */ | |
b8fdaf5a DW |
507 | i = 0; |
508 | do { | |
b4cb0d4d JD |
509 | res = i5k_find_amb_registers(data, chipset_ids[i].err); |
510 | if (res == 0) | |
511 | break; | |
b8fdaf5a | 512 | i++; |
b4cb0d4d | 513 | } while (chipset_ids[i].err); |
b8fdaf5a | 514 | |
298c7524 DW |
515 | if (res) |
516 | goto err; | |
517 | ||
518 | /* Copy the DIMM presence map for the first two channels */ | |
b4cb0d4d | 519 | res = i5k_channel_probe(&data->amb_present[0], chipset_ids[i].fbd0); |
298c7524 DW |
520 | if (res) |
521 | goto err; | |
522 | ||
523 | /* Copy the DIMM presence map for the optional second two channels */ | |
b4cb0d4d | 524 | i5k_channel_probe(&data->amb_present[2], chipset_ids[i].fbd0 + 1); |
298c7524 DW |
525 | |
526 | /* Set up resource regions */ | |
527 | reso = request_mem_region(data->amb_base, data->amb_len, DRVNAME); | |
528 | if (!reso) { | |
529 | res = -EBUSY; | |
530 | goto err; | |
531 | } | |
532 | ||
533 | data->amb_mmio = ioremap_nocache(data->amb_base, data->amb_len); | |
534 | if (!data->amb_mmio) { | |
535 | res = -EBUSY; | |
536 | goto err_map_failed; | |
537 | } | |
538 | ||
539 | platform_set_drvdata(pdev, data); | |
540 | ||
541 | res = i5k_amb_hwmon_init(pdev); | |
542 | if (res) | |
543 | goto err_init_failed; | |
544 | ||
545 | return res; | |
546 | ||
547 | err_init_failed: | |
548 | iounmap(data->amb_mmio); | |
549 | platform_set_drvdata(pdev, NULL); | |
550 | err_map_failed: | |
551 | release_mem_region(data->amb_base, data->amb_len); | |
552 | err: | |
553 | kfree(data); | |
554 | return res; | |
555 | } | |
556 | ||
557 | static int __devexit i5k_amb_remove(struct platform_device *pdev) | |
558 | { | |
559 | int i; | |
560 | struct i5k_amb_data *data = platform_get_drvdata(pdev); | |
561 | ||
562 | hwmon_device_unregister(data->hwmon_dev); | |
563 | device_remove_file(&pdev->dev, &dev_attr_name); | |
564 | for (i = 0; i < data->num_attrs; i++) | |
565 | device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr); | |
566 | kfree(data->attrs); | |
567 | iounmap(data->amb_mmio); | |
568 | release_mem_region(data->amb_base, data->amb_len); | |
569 | platform_set_drvdata(pdev, NULL); | |
570 | kfree(data); | |
571 | return 0; | |
572 | } | |
573 | ||
574 | static struct platform_driver i5k_amb_driver = { | |
575 | .driver = { | |
576 | .owner = THIS_MODULE, | |
577 | .name = DRVNAME, | |
578 | }, | |
579 | .probe = i5k_amb_probe, | |
580 | .remove = __devexit_p(i5k_amb_remove), | |
581 | }; | |
582 | ||
583 | static int __init i5k_amb_init(void) | |
584 | { | |
585 | int res; | |
586 | ||
587 | res = platform_driver_register(&i5k_amb_driver); | |
588 | if (res) | |
589 | return res; | |
590 | ||
591 | res = i5k_amb_add(); | |
592 | if (res) | |
593 | platform_driver_unregister(&i5k_amb_driver); | |
594 | ||
595 | return res; | |
596 | } | |
597 | ||
598 | static void __exit i5k_amb_exit(void) | |
599 | { | |
600 | platform_device_unregister(amb_pdev); | |
601 | platform_driver_unregister(&i5k_amb_driver); | |
602 | } | |
603 | ||
604 | MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>"); | |
605 | MODULE_DESCRIPTION("Intel 5000 chipset FB-DIMM AMB temperature sensor"); | |
606 | MODULE_LICENSE("GPL"); | |
607 | ||
608 | module_init(i5k_amb_init); | |
609 | module_exit(i5k_amb_exit); |