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; | |
b8fdaf5a | 117 | unsigned long chipset_id; |
298c7524 DW |
118 | }; |
119 | ||
120 | static ssize_t show_name(struct device *dev, struct device_attribute *devattr, | |
121 | char *buf) | |
122 | { | |
123 | return sprintf(buf, "%s\n", DRVNAME); | |
124 | } | |
125 | ||
126 | ||
127 | static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); | |
128 | ||
129 | static struct platform_device *amb_pdev; | |
130 | ||
131 | static u8 amb_read_byte(struct i5k_amb_data *data, unsigned long offset) | |
132 | { | |
133 | return ioread8(data->amb_mmio + offset); | |
134 | } | |
135 | ||
136 | static void amb_write_byte(struct i5k_amb_data *data, unsigned long offset, | |
137 | u8 val) | |
138 | { | |
139 | iowrite8(val, data->amb_mmio + offset); | |
140 | } | |
141 | ||
142 | static ssize_t show_amb_alarm(struct device *dev, | |
143 | struct device_attribute *devattr, | |
144 | char *buf) | |
145 | { | |
146 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
147 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
148 | ||
59a030a9 DW |
149 | if (!(amb_read_byte(data, amb_reg_temp_status(attr->index)) & 0x20) && |
150 | (amb_read_byte(data, amb_reg_temp_status(attr->index)) & 0x8)) | |
298c7524 DW |
151 | return sprintf(buf, "1\n"); |
152 | else | |
153 | return sprintf(buf, "0\n"); | |
154 | } | |
155 | ||
156 | static ssize_t store_amb_min(struct device *dev, | |
157 | struct device_attribute *devattr, | |
158 | const char *buf, | |
159 | size_t count) | |
160 | { | |
161 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
162 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
163 | unsigned long temp = simple_strtoul(buf, NULL, 10) / 500; | |
164 | ||
165 | if (temp > 255) | |
166 | temp = 255; | |
167 | ||
59a030a9 | 168 | amb_write_byte(data, amb_reg_temp_min(attr->index), temp); |
298c7524 DW |
169 | return count; |
170 | } | |
171 | ||
172 | static ssize_t store_amb_mid(struct device *dev, | |
173 | struct device_attribute *devattr, | |
174 | const char *buf, | |
175 | size_t count) | |
176 | { | |
177 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
178 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
179 | unsigned long temp = simple_strtoul(buf, NULL, 10) / 500; | |
180 | ||
181 | if (temp > 255) | |
182 | temp = 255; | |
183 | ||
59a030a9 | 184 | amb_write_byte(data, amb_reg_temp_mid(attr->index), temp); |
298c7524 DW |
185 | return count; |
186 | } | |
187 | ||
188 | static ssize_t store_amb_max(struct device *dev, | |
189 | struct device_attribute *devattr, | |
190 | const char *buf, | |
191 | size_t count) | |
192 | { | |
193 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
194 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
195 | unsigned long temp = simple_strtoul(buf, NULL, 10) / 500; | |
196 | ||
197 | if (temp > 255) | |
198 | temp = 255; | |
199 | ||
59a030a9 | 200 | amb_write_byte(data, amb_reg_temp_max(attr->index), temp); |
298c7524 DW |
201 | return count; |
202 | } | |
203 | ||
204 | static ssize_t show_amb_min(struct device *dev, | |
205 | struct device_attribute *devattr, | |
206 | char *buf) | |
207 | { | |
208 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
209 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
210 | return sprintf(buf, "%d\n", | |
59a030a9 | 211 | 500 * amb_read_byte(data, amb_reg_temp_min(attr->index))); |
298c7524 DW |
212 | } |
213 | ||
214 | static ssize_t show_amb_mid(struct device *dev, | |
215 | struct device_attribute *devattr, | |
216 | char *buf) | |
217 | { | |
218 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
219 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
220 | return sprintf(buf, "%d\n", | |
59a030a9 | 221 | 500 * amb_read_byte(data, amb_reg_temp_mid(attr->index))); |
298c7524 DW |
222 | } |
223 | ||
224 | static ssize_t show_amb_max(struct device *dev, | |
225 | struct device_attribute *devattr, | |
226 | char *buf) | |
227 | { | |
228 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
229 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
230 | return sprintf(buf, "%d\n", | |
59a030a9 | 231 | 500 * amb_read_byte(data, amb_reg_temp_max(attr->index))); |
298c7524 DW |
232 | } |
233 | ||
234 | static ssize_t show_amb_temp(struct device *dev, | |
235 | struct device_attribute *devattr, | |
236 | char *buf) | |
237 | { | |
238 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
239 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
240 | return sprintf(buf, "%d\n", | |
59a030a9 | 241 | 500 * amb_read_byte(data, amb_reg_temp(attr->index))); |
298c7524 DW |
242 | } |
243 | ||
963d96b5 DW |
244 | static ssize_t show_label(struct device *dev, |
245 | struct device_attribute *devattr, | |
246 | char *buf) | |
247 | { | |
248 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
249 | ||
250 | return sprintf(buf, "Ch. %d DIMM %d\n", attr->index >> CHANNEL_SHIFT, | |
251 | attr->index & DIMM_MASK); | |
252 | } | |
253 | ||
298c7524 DW |
254 | static int __devinit i5k_amb_hwmon_init(struct platform_device *pdev) |
255 | { | |
256 | int i, j, k, d = 0; | |
257 | u16 c; | |
258 | int res = 0; | |
259 | int num_ambs = 0; | |
260 | struct i5k_amb_data *data = platform_get_drvdata(pdev); | |
261 | ||
262 | /* Count the number of AMBs found */ | |
263 | /* ignore the high-order bit, see "Ugly hack" comment above */ | |
264 | for (i = 0; i < MAX_MEM_CHANNELS; i++) | |
265 | num_ambs += hweight16(data->amb_present[i] & 0x7fff); | |
266 | ||
267 | /* Set up sysfs stuff */ | |
268 | data->attrs = kzalloc(sizeof(*data->attrs) * num_ambs * KNOBS_PER_AMB, | |
269 | GFP_KERNEL); | |
270 | if (!data->attrs) | |
271 | return -ENOMEM; | |
272 | data->num_attrs = 0; | |
273 | ||
274 | for (i = 0; i < MAX_MEM_CHANNELS; i++) { | |
275 | c = data->amb_present[i]; | |
276 | for (j = 0; j < REAL_MAX_AMBS_PER_CHANNEL; j++, c >>= 1) { | |
277 | struct i5k_device_attribute *iattr; | |
278 | ||
59a030a9 | 279 | k = amb_num_from_reg(i, j); |
298c7524 DW |
280 | if (!(c & 0x1)) |
281 | continue; | |
282 | d++; | |
283 | ||
963d96b5 DW |
284 | /* sysfs label */ |
285 | iattr = data->attrs + data->num_attrs; | |
286 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
287 | "temp%d_label", d); | |
288 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
289 | iattr->s_attr.dev_attr.attr.mode = S_IRUGO; | |
290 | iattr->s_attr.dev_attr.show = show_label; | |
291 | iattr->s_attr.index = k; | |
0e6c7870 | 292 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
963d96b5 DW |
293 | res = device_create_file(&pdev->dev, |
294 | &iattr->s_attr.dev_attr); | |
295 | if (res) | |
296 | goto exit_remove; | |
297 | data->num_attrs++; | |
298 | ||
298c7524 DW |
299 | /* Temperature sysfs knob */ |
300 | iattr = data->attrs + data->num_attrs; | |
301 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
302 | "temp%d_input", d); | |
303 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
304 | iattr->s_attr.dev_attr.attr.mode = S_IRUGO; | |
305 | iattr->s_attr.dev_attr.show = show_amb_temp; | |
306 | iattr->s_attr.index = k; | |
0e6c7870 | 307 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
308 | res = device_create_file(&pdev->dev, |
309 | &iattr->s_attr.dev_attr); | |
310 | if (res) | |
311 | goto exit_remove; | |
312 | data->num_attrs++; | |
313 | ||
314 | /* Temperature min sysfs knob */ | |
315 | iattr = data->attrs + data->num_attrs; | |
316 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
317 | "temp%d_min", d); | |
318 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
319 | iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO; | |
320 | iattr->s_attr.dev_attr.show = show_amb_min; | |
321 | iattr->s_attr.dev_attr.store = store_amb_min; | |
322 | iattr->s_attr.index = k; | |
0e6c7870 | 323 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
324 | res = device_create_file(&pdev->dev, |
325 | &iattr->s_attr.dev_attr); | |
326 | if (res) | |
327 | goto exit_remove; | |
328 | data->num_attrs++; | |
329 | ||
330 | /* Temperature mid sysfs knob */ | |
331 | iattr = data->attrs + data->num_attrs; | |
332 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
333 | "temp%d_mid", d); | |
334 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
335 | iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO; | |
336 | iattr->s_attr.dev_attr.show = show_amb_mid; | |
337 | iattr->s_attr.dev_attr.store = store_amb_mid; | |
338 | iattr->s_attr.index = k; | |
0e6c7870 | 339 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
340 | res = device_create_file(&pdev->dev, |
341 | &iattr->s_attr.dev_attr); | |
342 | if (res) | |
343 | goto exit_remove; | |
344 | data->num_attrs++; | |
345 | ||
346 | /* Temperature max sysfs knob */ | |
347 | iattr = data->attrs + data->num_attrs; | |
348 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
349 | "temp%d_max", d); | |
350 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
351 | iattr->s_attr.dev_attr.attr.mode = S_IWUSR | S_IRUGO; | |
352 | iattr->s_attr.dev_attr.show = show_amb_max; | |
353 | iattr->s_attr.dev_attr.store = store_amb_max; | |
354 | iattr->s_attr.index = k; | |
0e6c7870 | 355 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
356 | res = device_create_file(&pdev->dev, |
357 | &iattr->s_attr.dev_attr); | |
358 | if (res) | |
359 | goto exit_remove; | |
360 | data->num_attrs++; | |
361 | ||
362 | /* Temperature alarm sysfs knob */ | |
363 | iattr = data->attrs + data->num_attrs; | |
364 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
365 | "temp%d_alarm", d); | |
366 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
367 | iattr->s_attr.dev_attr.attr.mode = S_IRUGO; | |
368 | iattr->s_attr.dev_attr.show = show_amb_alarm; | |
369 | iattr->s_attr.index = k; | |
0e6c7870 | 370 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
371 | res = device_create_file(&pdev->dev, |
372 | &iattr->s_attr.dev_attr); | |
373 | if (res) | |
374 | goto exit_remove; | |
375 | data->num_attrs++; | |
376 | } | |
377 | } | |
378 | ||
379 | res = device_create_file(&pdev->dev, &dev_attr_name); | |
380 | if (res) | |
381 | goto exit_remove; | |
382 | ||
383 | data->hwmon_dev = hwmon_device_register(&pdev->dev); | |
384 | if (IS_ERR(data->hwmon_dev)) { | |
385 | res = PTR_ERR(data->hwmon_dev); | |
386 | goto exit_remove; | |
387 | } | |
388 | ||
389 | return res; | |
390 | ||
391 | exit_remove: | |
392 | device_remove_file(&pdev->dev, &dev_attr_name); | |
393 | for (i = 0; i < data->num_attrs; i++) | |
394 | device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr); | |
395 | kfree(data->attrs); | |
396 | ||
397 | return res; | |
398 | } | |
399 | ||
400 | static int __devinit i5k_amb_add(void) | |
401 | { | |
402 | int res = -ENODEV; | |
403 | ||
404 | /* only ever going to be one of these */ | |
405 | amb_pdev = platform_device_alloc(DRVNAME, 0); | |
406 | if (!amb_pdev) | |
407 | return -ENOMEM; | |
408 | ||
409 | res = platform_device_add(amb_pdev); | |
410 | if (res) | |
411 | goto err; | |
412 | return 0; | |
413 | ||
414 | err: | |
415 | platform_device_put(amb_pdev); | |
416 | return res; | |
417 | } | |
418 | ||
b8fdaf5a DW |
419 | static int __devinit i5k_find_amb_registers(struct i5k_amb_data *data, |
420 | unsigned long devid) | |
298c7524 DW |
421 | { |
422 | struct pci_dev *pcidev; | |
423 | u32 val32; | |
424 | int res = -ENODEV; | |
425 | ||
426 | /* Find AMB register memory space */ | |
427 | pcidev = pci_get_device(PCI_VENDOR_ID_INTEL, | |
b8fdaf5a | 428 | devid, |
298c7524 DW |
429 | NULL); |
430 | if (!pcidev) | |
431 | return -ENODEV; | |
432 | ||
433 | if (pci_read_config_dword(pcidev, I5K_REG_AMB_BASE_ADDR, &val32)) | |
434 | goto out; | |
435 | data->amb_base = val32; | |
436 | ||
437 | if (pci_read_config_dword(pcidev, I5K_REG_AMB_LEN_ADDR, &val32)) | |
438 | goto out; | |
439 | data->amb_len = val32; | |
440 | ||
441 | /* Is it big enough? */ | |
442 | if (data->amb_len < AMB_CONFIG_SIZE * MAX_AMBS) { | |
443 | dev_err(&pcidev->dev, "AMB region too small!\n"); | |
444 | goto out; | |
445 | } | |
446 | ||
b8fdaf5a DW |
447 | data->chipset_id = devid; |
448 | ||
298c7524 DW |
449 | res = 0; |
450 | out: | |
451 | pci_dev_put(pcidev); | |
452 | return res; | |
453 | } | |
454 | ||
455 | static int __devinit i5k_channel_probe(u16 *amb_present, unsigned long dev_id) | |
456 | { | |
457 | struct pci_dev *pcidev; | |
458 | u16 val16; | |
459 | int res = -ENODEV; | |
460 | ||
461 | /* Copy the DIMM presence map for these two channels */ | |
462 | pcidev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_id, NULL); | |
463 | if (!pcidev) | |
464 | return -ENODEV; | |
465 | ||
466 | if (pci_read_config_word(pcidev, I5K_REG_CHAN0_PRESENCE_ADDR, &val16)) | |
467 | goto out; | |
468 | amb_present[0] = val16; | |
469 | ||
470 | if (pci_read_config_word(pcidev, I5K_REG_CHAN1_PRESENCE_ADDR, &val16)) | |
471 | goto out; | |
472 | amb_present[1] = val16; | |
473 | ||
474 | res = 0; | |
475 | ||
476 | out: | |
477 | pci_dev_put(pcidev); | |
478 | return res; | |
479 | } | |
480 | ||
b8fdaf5a DW |
481 | static unsigned long i5k_channel_pci_id(struct i5k_amb_data *data, |
482 | unsigned long channel) | |
483 | { | |
484 | switch (data->chipset_id) { | |
485 | case PCI_DEVICE_ID_INTEL_5000_ERR: | |
486 | return PCI_DEVICE_ID_INTEL_5000_FBD0 + channel; | |
487 | case PCI_DEVICE_ID_INTEL_5400_ERR: | |
488 | return PCI_DEVICE_ID_INTEL_5400_FBD0 + channel; | |
489 | default: | |
490 | BUG(); | |
491 | } | |
492 | } | |
493 | ||
494 | static unsigned long chipset_ids[] = { | |
495 | PCI_DEVICE_ID_INTEL_5000_ERR, | |
496 | PCI_DEVICE_ID_INTEL_5400_ERR, | |
497 | 0 | |
498 | }; | |
499 | ||
c48a2916 | 500 | #ifdef MODULE |
6e31eb2b DW |
501 | static struct pci_device_id i5k_amb_ids[] __devinitdata = { |
502 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5000_ERR) }, | |
503 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5400_ERR) }, | |
504 | { 0, } | |
505 | }; | |
506 | MODULE_DEVICE_TABLE(pci, i5k_amb_ids); | |
c48a2916 | 507 | #endif |
6e31eb2b | 508 | |
298c7524 DW |
509 | static int __devinit i5k_amb_probe(struct platform_device *pdev) |
510 | { | |
511 | struct i5k_amb_data *data; | |
512 | struct resource *reso; | |
b8fdaf5a | 513 | int i; |
298c7524 DW |
514 | int res = -ENODEV; |
515 | ||
516 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
517 | if (!data) | |
518 | return -ENOMEM; | |
519 | ||
520 | /* Figure out where the AMB registers live */ | |
b8fdaf5a DW |
521 | i = 0; |
522 | do { | |
523 | res = i5k_find_amb_registers(data, chipset_ids[i]); | |
524 | i++; | |
525 | } while (res && chipset_ids[i]); | |
526 | ||
298c7524 DW |
527 | if (res) |
528 | goto err; | |
529 | ||
530 | /* Copy the DIMM presence map for the first two channels */ | |
531 | res = i5k_channel_probe(&data->amb_present[0], | |
b8fdaf5a | 532 | i5k_channel_pci_id(data, 0)); |
298c7524 DW |
533 | if (res) |
534 | goto err; | |
535 | ||
536 | /* Copy the DIMM presence map for the optional second two channels */ | |
537 | i5k_channel_probe(&data->amb_present[2], | |
b8fdaf5a | 538 | i5k_channel_pci_id(data, 1)); |
298c7524 DW |
539 | |
540 | /* Set up resource regions */ | |
541 | reso = request_mem_region(data->amb_base, data->amb_len, DRVNAME); | |
542 | if (!reso) { | |
543 | res = -EBUSY; | |
544 | goto err; | |
545 | } | |
546 | ||
547 | data->amb_mmio = ioremap_nocache(data->amb_base, data->amb_len); | |
548 | if (!data->amb_mmio) { | |
549 | res = -EBUSY; | |
550 | goto err_map_failed; | |
551 | } | |
552 | ||
553 | platform_set_drvdata(pdev, data); | |
554 | ||
555 | res = i5k_amb_hwmon_init(pdev); | |
556 | if (res) | |
557 | goto err_init_failed; | |
558 | ||
559 | return res; | |
560 | ||
561 | err_init_failed: | |
562 | iounmap(data->amb_mmio); | |
563 | platform_set_drvdata(pdev, NULL); | |
564 | err_map_failed: | |
565 | release_mem_region(data->amb_base, data->amb_len); | |
566 | err: | |
567 | kfree(data); | |
568 | return res; | |
569 | } | |
570 | ||
571 | static int __devexit i5k_amb_remove(struct platform_device *pdev) | |
572 | { | |
573 | int i; | |
574 | struct i5k_amb_data *data = platform_get_drvdata(pdev); | |
575 | ||
576 | hwmon_device_unregister(data->hwmon_dev); | |
577 | device_remove_file(&pdev->dev, &dev_attr_name); | |
578 | for (i = 0; i < data->num_attrs; i++) | |
579 | device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr); | |
580 | kfree(data->attrs); | |
581 | iounmap(data->amb_mmio); | |
582 | release_mem_region(data->amb_base, data->amb_len); | |
583 | platform_set_drvdata(pdev, NULL); | |
584 | kfree(data); | |
585 | return 0; | |
586 | } | |
587 | ||
588 | static struct platform_driver i5k_amb_driver = { | |
589 | .driver = { | |
590 | .owner = THIS_MODULE, | |
591 | .name = DRVNAME, | |
592 | }, | |
593 | .probe = i5k_amb_probe, | |
594 | .remove = __devexit_p(i5k_amb_remove), | |
595 | }; | |
596 | ||
597 | static int __init i5k_amb_init(void) | |
598 | { | |
599 | int res; | |
600 | ||
601 | res = platform_driver_register(&i5k_amb_driver); | |
602 | if (res) | |
603 | return res; | |
604 | ||
605 | res = i5k_amb_add(); | |
606 | if (res) | |
607 | platform_driver_unregister(&i5k_amb_driver); | |
608 | ||
609 | return res; | |
610 | } | |
611 | ||
612 | static void __exit i5k_amb_exit(void) | |
613 | { | |
614 | platform_device_unregister(amb_pdev); | |
615 | platform_driver_unregister(&i5k_amb_driver); | |
616 | } | |
617 | ||
618 | MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>"); | |
619 | MODULE_DESCRIPTION("Intel 5000 chipset FB-DIMM AMB temperature sensor"); | |
620 | MODULE_LICENSE("GPL"); | |
621 | ||
622 | module_init(i5k_amb_init); | |
623 | module_exit(i5k_amb_exit); |