Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
298c7524 DW |
2 | /* |
3 | * A hwmon driver for the Intel 5000 series chipset FB-DIMM AMB | |
4 | * temperature sensors | |
5 | * Copyright (C) 2007 IBM | |
6 | * | |
5407e051 | 7 | * Author: Darrick J. Wong <darrick.wong@oracle.com> |
298c7524 DW |
8 | */ |
9 | ||
10 | #include <linux/module.h> | |
298c7524 DW |
11 | #include <linux/hwmon.h> |
12 | #include <linux/hwmon-sysfs.h> | |
13 | #include <linux/err.h> | |
14 | #include <linux/mutex.h> | |
298c7524 DW |
15 | #include <linux/log2.h> |
16 | #include <linux/pci.h> | |
17 | #include <linux/platform_device.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
298c7524 DW |
19 | |
20 | #define DRVNAME "i5k_amb" | |
21 | ||
22 | #define I5K_REG_AMB_BASE_ADDR 0x48 | |
23 | #define I5K_REG_AMB_LEN_ADDR 0x50 | |
24 | #define I5K_REG_CHAN0_PRESENCE_ADDR 0x64 | |
25 | #define I5K_REG_CHAN1_PRESENCE_ADDR 0x66 | |
26 | ||
27 | #define AMB_REG_TEMP_MIN_ADDR 0x80 | |
28 | #define AMB_REG_TEMP_MID_ADDR 0x81 | |
29 | #define AMB_REG_TEMP_MAX_ADDR 0x82 | |
30 | #define AMB_REG_TEMP_STATUS_ADDR 0x84 | |
31 | #define AMB_REG_TEMP_ADDR 0x85 | |
32 | ||
33 | #define AMB_CONFIG_SIZE 2048 | |
34 | #define AMB_FUNC_3_OFFSET 768 | |
35 | ||
59a030a9 DW |
36 | static unsigned long amb_reg_temp_status(unsigned int amb) |
37 | { | |
38 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_STATUS_ADDR + | |
39 | AMB_CONFIG_SIZE * amb; | |
40 | } | |
41 | ||
42 | static unsigned long amb_reg_temp_min(unsigned int amb) | |
43 | { | |
44 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MIN_ADDR + | |
45 | AMB_CONFIG_SIZE * amb; | |
46 | } | |
47 | ||
48 | static unsigned long amb_reg_temp_mid(unsigned int amb) | |
49 | { | |
50 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MID_ADDR + | |
51 | AMB_CONFIG_SIZE * amb; | |
52 | } | |
53 | ||
54 | static unsigned long amb_reg_temp_max(unsigned int amb) | |
55 | { | |
56 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_MAX_ADDR + | |
57 | AMB_CONFIG_SIZE * amb; | |
58 | } | |
59 | ||
60 | static unsigned long amb_reg_temp(unsigned int amb) | |
61 | { | |
62 | return AMB_FUNC_3_OFFSET + AMB_REG_TEMP_ADDR + | |
63 | AMB_CONFIG_SIZE * amb; | |
64 | } | |
298c7524 DW |
65 | |
66 | #define MAX_MEM_CHANNELS 4 | |
67 | #define MAX_AMBS_PER_CHANNEL 16 | |
68 | #define MAX_AMBS (MAX_MEM_CHANNELS * \ | |
69 | MAX_AMBS_PER_CHANNEL) | |
963d96b5 DW |
70 | #define CHANNEL_SHIFT 4 |
71 | #define DIMM_MASK 0xF | |
298c7524 DW |
72 | /* |
73 | * Ugly hack: For some reason the highest bit is set if there | |
74 | * are _any_ DIMMs in the channel. Attempting to read from | |
75 | * this "high-order" AMB results in a memory bus error, so | |
76 | * for now we'll just ignore that top bit, even though that | |
77 | * might prevent us from seeing the 16th DIMM in the channel. | |
78 | */ | |
79 | #define REAL_MAX_AMBS_PER_CHANNEL 15 | |
963d96b5 | 80 | #define KNOBS_PER_AMB 6 |
298c7524 | 81 | |
59a030a9 DW |
82 | static unsigned long amb_num_from_reg(unsigned int byte_num, unsigned int bit) |
83 | { | |
84 | return byte_num * MAX_AMBS_PER_CHANNEL + bit; | |
85 | } | |
298c7524 DW |
86 | |
87 | #define AMB_SYSFS_NAME_LEN 16 | |
88 | struct i5k_device_attribute { | |
89 | struct sensor_device_attribute s_attr; | |
90 | char name[AMB_SYSFS_NAME_LEN]; | |
91 | }; | |
92 | ||
93 | struct i5k_amb_data { | |
94 | struct device *hwmon_dev; | |
95 | ||
96 | unsigned long amb_base; | |
97 | unsigned long amb_len; | |
98 | u16 amb_present[MAX_MEM_CHANNELS]; | |
99 | void __iomem *amb_mmio; | |
100 | struct i5k_device_attribute *attrs; | |
101 | unsigned int num_attrs; | |
102 | }; | |
103 | ||
3edf03b3 | 104 | static ssize_t name_show(struct device *dev, struct device_attribute *devattr, |
298c7524 DW |
105 | char *buf) |
106 | { | |
107 | return sprintf(buf, "%s\n", DRVNAME); | |
108 | } | |
109 | ||
110 | ||
3edf03b3 | 111 | static DEVICE_ATTR_RO(name); |
298c7524 DW |
112 | |
113 | static struct platform_device *amb_pdev; | |
114 | ||
115 | static u8 amb_read_byte(struct i5k_amb_data *data, unsigned long offset) | |
116 | { | |
117 | return ioread8(data->amb_mmio + offset); | |
118 | } | |
119 | ||
120 | static void amb_write_byte(struct i5k_amb_data *data, unsigned long offset, | |
121 | u8 val) | |
122 | { | |
123 | iowrite8(val, data->amb_mmio + offset); | |
124 | } | |
125 | ||
126 | static ssize_t show_amb_alarm(struct device *dev, | |
127 | struct device_attribute *devattr, | |
128 | char *buf) | |
129 | { | |
130 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
131 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
132 | ||
59a030a9 DW |
133 | if (!(amb_read_byte(data, amb_reg_temp_status(attr->index)) & 0x20) && |
134 | (amb_read_byte(data, amb_reg_temp_status(attr->index)) & 0x8)) | |
298c7524 DW |
135 | return sprintf(buf, "1\n"); |
136 | else | |
137 | return sprintf(buf, "0\n"); | |
138 | } | |
139 | ||
140 | static ssize_t store_amb_min(struct device *dev, | |
141 | struct device_attribute *devattr, | |
142 | const char *buf, | |
143 | size_t count) | |
144 | { | |
145 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
146 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
7b102ed6 FM |
147 | unsigned long temp; |
148 | int ret = kstrtoul(buf, 10, &temp); | |
149 | if (ret < 0) | |
150 | return ret; | |
298c7524 | 151 | |
7b102ed6 | 152 | temp = temp / 500; |
298c7524 DW |
153 | if (temp > 255) |
154 | temp = 255; | |
155 | ||
59a030a9 | 156 | amb_write_byte(data, amb_reg_temp_min(attr->index), temp); |
298c7524 DW |
157 | return count; |
158 | } | |
159 | ||
160 | static ssize_t store_amb_mid(struct device *dev, | |
161 | struct device_attribute *devattr, | |
162 | const char *buf, | |
163 | size_t count) | |
164 | { | |
165 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
166 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
7b102ed6 FM |
167 | unsigned long temp; |
168 | int ret = kstrtoul(buf, 10, &temp); | |
169 | if (ret < 0) | |
170 | return ret; | |
298c7524 | 171 | |
7b102ed6 | 172 | temp = temp / 500; |
298c7524 DW |
173 | if (temp > 255) |
174 | temp = 255; | |
175 | ||
59a030a9 | 176 | amb_write_byte(data, amb_reg_temp_mid(attr->index), temp); |
298c7524 DW |
177 | return count; |
178 | } | |
179 | ||
180 | static ssize_t store_amb_max(struct device *dev, | |
181 | struct device_attribute *devattr, | |
182 | const char *buf, | |
183 | size_t count) | |
184 | { | |
185 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
186 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
7b102ed6 FM |
187 | unsigned long temp; |
188 | int ret = kstrtoul(buf, 10, &temp); | |
189 | if (ret < 0) | |
190 | return ret; | |
298c7524 | 191 | |
7b102ed6 | 192 | temp = temp / 500; |
298c7524 DW |
193 | if (temp > 255) |
194 | temp = 255; | |
195 | ||
59a030a9 | 196 | amb_write_byte(data, amb_reg_temp_max(attr->index), temp); |
298c7524 DW |
197 | return count; |
198 | } | |
199 | ||
200 | static ssize_t show_amb_min(struct device *dev, | |
201 | struct device_attribute *devattr, | |
202 | char *buf) | |
203 | { | |
204 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
205 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
206 | return sprintf(buf, "%d\n", | |
59a030a9 | 207 | 500 * amb_read_byte(data, amb_reg_temp_min(attr->index))); |
298c7524 DW |
208 | } |
209 | ||
210 | static ssize_t show_amb_mid(struct device *dev, | |
211 | struct device_attribute *devattr, | |
212 | char *buf) | |
213 | { | |
214 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
215 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
216 | return sprintf(buf, "%d\n", | |
59a030a9 | 217 | 500 * amb_read_byte(data, amb_reg_temp_mid(attr->index))); |
298c7524 DW |
218 | } |
219 | ||
220 | static ssize_t show_amb_max(struct device *dev, | |
221 | struct device_attribute *devattr, | |
222 | char *buf) | |
223 | { | |
224 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
225 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
226 | return sprintf(buf, "%d\n", | |
59a030a9 | 227 | 500 * amb_read_byte(data, amb_reg_temp_max(attr->index))); |
298c7524 DW |
228 | } |
229 | ||
230 | static ssize_t show_amb_temp(struct device *dev, | |
231 | struct device_attribute *devattr, | |
232 | char *buf) | |
233 | { | |
234 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
235 | struct i5k_amb_data *data = dev_get_drvdata(dev); | |
236 | return sprintf(buf, "%d\n", | |
59a030a9 | 237 | 500 * amb_read_byte(data, amb_reg_temp(attr->index))); |
298c7524 DW |
238 | } |
239 | ||
963d96b5 DW |
240 | static ssize_t show_label(struct device *dev, |
241 | struct device_attribute *devattr, | |
242 | char *buf) | |
243 | { | |
244 | struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); | |
245 | ||
246 | return sprintf(buf, "Ch. %d DIMM %d\n", attr->index >> CHANNEL_SHIFT, | |
247 | attr->index & DIMM_MASK); | |
248 | } | |
249 | ||
6c931ae1 | 250 | static int i5k_amb_hwmon_init(struct platform_device *pdev) |
298c7524 DW |
251 | { |
252 | int i, j, k, d = 0; | |
253 | u16 c; | |
254 | int res = 0; | |
255 | int num_ambs = 0; | |
256 | struct i5k_amb_data *data = platform_get_drvdata(pdev); | |
257 | ||
258 | /* Count the number of AMBs found */ | |
259 | /* ignore the high-order bit, see "Ugly hack" comment above */ | |
260 | for (i = 0; i < MAX_MEM_CHANNELS; i++) | |
261 | num_ambs += hweight16(data->amb_present[i] & 0x7fff); | |
262 | ||
263 | /* Set up sysfs stuff */ | |
6396bb22 KC |
264 | data->attrs = kzalloc(array3_size(num_ambs, KNOBS_PER_AMB, |
265 | sizeof(*data->attrs)), | |
266 | GFP_KERNEL); | |
298c7524 DW |
267 | if (!data->attrs) |
268 | return -ENOMEM; | |
269 | data->num_attrs = 0; | |
270 | ||
271 | for (i = 0; i < MAX_MEM_CHANNELS; i++) { | |
272 | c = data->amb_present[i]; | |
273 | for (j = 0; j < REAL_MAX_AMBS_PER_CHANNEL; j++, c >>= 1) { | |
274 | struct i5k_device_attribute *iattr; | |
275 | ||
59a030a9 | 276 | k = amb_num_from_reg(i, j); |
298c7524 DW |
277 | if (!(c & 0x1)) |
278 | continue; | |
279 | d++; | |
280 | ||
963d96b5 DW |
281 | /* sysfs label */ |
282 | iattr = data->attrs + data->num_attrs; | |
283 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
284 | "temp%d_label", d); | |
285 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
2f8f7102 | 286 | iattr->s_attr.dev_attr.attr.mode = 0444; |
963d96b5 DW |
287 | iattr->s_attr.dev_attr.show = show_label; |
288 | iattr->s_attr.index = k; | |
0e6c7870 | 289 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
963d96b5 DW |
290 | res = device_create_file(&pdev->dev, |
291 | &iattr->s_attr.dev_attr); | |
292 | if (res) | |
293 | goto exit_remove; | |
294 | data->num_attrs++; | |
295 | ||
298c7524 DW |
296 | /* Temperature sysfs knob */ |
297 | iattr = data->attrs + data->num_attrs; | |
298 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
299 | "temp%d_input", d); | |
300 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
2f8f7102 | 301 | iattr->s_attr.dev_attr.attr.mode = 0444; |
298c7524 DW |
302 | iattr->s_attr.dev_attr.show = show_amb_temp; |
303 | iattr->s_attr.index = k; | |
0e6c7870 | 304 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
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; | |
2f8f7102 | 316 | iattr->s_attr.dev_attr.attr.mode = 0644; |
298c7524 DW |
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; | |
0e6c7870 | 320 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
321 | res = device_create_file(&pdev->dev, |
322 | &iattr->s_attr.dev_attr); | |
323 | if (res) | |
324 | goto exit_remove; | |
325 | data->num_attrs++; | |
326 | ||
327 | /* Temperature mid sysfs knob */ | |
328 | iattr = data->attrs + data->num_attrs; | |
329 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
330 | "temp%d_mid", d); | |
331 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
2f8f7102 | 332 | iattr->s_attr.dev_attr.attr.mode = 0644; |
298c7524 DW |
333 | iattr->s_attr.dev_attr.show = show_amb_mid; |
334 | iattr->s_attr.dev_attr.store = store_amb_mid; | |
335 | iattr->s_attr.index = k; | |
0e6c7870 | 336 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
337 | res = device_create_file(&pdev->dev, |
338 | &iattr->s_attr.dev_attr); | |
339 | if (res) | |
340 | goto exit_remove; | |
341 | data->num_attrs++; | |
342 | ||
343 | /* Temperature max sysfs knob */ | |
344 | iattr = data->attrs + data->num_attrs; | |
345 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
346 | "temp%d_max", d); | |
347 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
2f8f7102 | 348 | iattr->s_attr.dev_attr.attr.mode = 0644; |
298c7524 DW |
349 | iattr->s_attr.dev_attr.show = show_amb_max; |
350 | iattr->s_attr.dev_attr.store = store_amb_max; | |
351 | iattr->s_attr.index = k; | |
0e6c7870 | 352 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
353 | res = device_create_file(&pdev->dev, |
354 | &iattr->s_attr.dev_attr); | |
355 | if (res) | |
356 | goto exit_remove; | |
357 | data->num_attrs++; | |
358 | ||
359 | /* Temperature alarm sysfs knob */ | |
360 | iattr = data->attrs + data->num_attrs; | |
361 | snprintf(iattr->name, AMB_SYSFS_NAME_LEN, | |
362 | "temp%d_alarm", d); | |
363 | iattr->s_attr.dev_attr.attr.name = iattr->name; | |
2f8f7102 | 364 | iattr->s_attr.dev_attr.attr.mode = 0444; |
298c7524 DW |
365 | iattr->s_attr.dev_attr.show = show_amb_alarm; |
366 | iattr->s_attr.index = k; | |
0e6c7870 | 367 | sysfs_attr_init(&iattr->s_attr.dev_attr.attr); |
298c7524 DW |
368 | res = device_create_file(&pdev->dev, |
369 | &iattr->s_attr.dev_attr); | |
370 | if (res) | |
371 | goto exit_remove; | |
372 | data->num_attrs++; | |
373 | } | |
374 | } | |
375 | ||
376 | res = device_create_file(&pdev->dev, &dev_attr_name); | |
377 | if (res) | |
378 | goto exit_remove; | |
379 | ||
380 | data->hwmon_dev = hwmon_device_register(&pdev->dev); | |
381 | if (IS_ERR(data->hwmon_dev)) { | |
382 | res = PTR_ERR(data->hwmon_dev); | |
383 | goto exit_remove; | |
384 | } | |
385 | ||
386 | return res; | |
387 | ||
388 | exit_remove: | |
389 | device_remove_file(&pdev->dev, &dev_attr_name); | |
390 | for (i = 0; i < data->num_attrs; i++) | |
391 | device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr); | |
392 | kfree(data->attrs); | |
393 | ||
394 | return res; | |
395 | } | |
396 | ||
6c931ae1 | 397 | static int i5k_amb_add(void) |
298c7524 | 398 | { |
9e444234 | 399 | int res; |
298c7524 DW |
400 | |
401 | /* only ever going to be one of these */ | |
402 | amb_pdev = platform_device_alloc(DRVNAME, 0); | |
403 | if (!amb_pdev) | |
404 | return -ENOMEM; | |
405 | ||
406 | res = platform_device_add(amb_pdev); | |
407 | if (res) | |
408 | goto err; | |
409 | return 0; | |
410 | ||
411 | err: | |
412 | platform_device_put(amb_pdev); | |
413 | return res; | |
414 | } | |
415 | ||
6c931ae1 | 416 | static int i5k_find_amb_registers(struct i5k_amb_data *data, |
b8fdaf5a | 417 | unsigned long devid) |
298c7524 DW |
418 | { |
419 | struct pci_dev *pcidev; | |
420 | u32 val32; | |
421 | int res = -ENODEV; | |
422 | ||
423 | /* Find AMB register memory space */ | |
424 | pcidev = pci_get_device(PCI_VENDOR_ID_INTEL, | |
b8fdaf5a | 425 | devid, |
298c7524 DW |
426 | NULL); |
427 | if (!pcidev) | |
428 | return -ENODEV; | |
429 | ||
2207515d SB |
430 | pci_read_config_dword(pcidev, I5K_REG_AMB_BASE_ADDR, &val32); |
431 | if (val32 == (u32)~0) | |
298c7524 DW |
432 | goto out; |
433 | data->amb_base = val32; | |
434 | ||
2207515d SB |
435 | pci_read_config_dword(pcidev, I5K_REG_AMB_LEN_ADDR, &val32); |
436 | if (val32 == (u32)~0) | |
298c7524 DW |
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 | ||
6c931ae1 | 452 | static int i5k_channel_probe(u16 *amb_present, unsigned long dev_id) |
298c7524 DW |
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 | ||
2207515d SB |
463 | pci_read_config_word(pcidev, I5K_REG_CHAN0_PRESENCE_ADDR, &val16); |
464 | if (val16 == (u16)~0) | |
298c7524 DW |
465 | goto out; |
466 | amb_present[0] = val16; | |
467 | ||
2207515d SB |
468 | pci_read_config_word(pcidev, I5K_REG_CHAN1_PRESENCE_ADDR, &val16); |
469 | if (val16 == (u16)~0) | |
298c7524 DW |
470 | goto out; |
471 | amb_present[1] = val16; | |
472 | ||
473 | res = 0; | |
474 | ||
475 | out: | |
476 | pci_dev_put(pcidev); | |
477 | return res; | |
478 | } | |
479 | ||
b4cb0d4d JD |
480 | static struct { |
481 | unsigned long err; | |
482 | unsigned long fbd0; | |
a5977246 | 483 | } chipset_ids[] = { |
b4cb0d4d JD |
484 | { PCI_DEVICE_ID_INTEL_5000_ERR, PCI_DEVICE_ID_INTEL_5000_FBD0 }, |
485 | { PCI_DEVICE_ID_INTEL_5400_ERR, PCI_DEVICE_ID_INTEL_5400_FBD0 }, | |
486 | { 0, 0 } | |
b8fdaf5a DW |
487 | }; |
488 | ||
c48a2916 | 489 | #ifdef MODULE |
4d3f2414 | 490 | static const struct pci_device_id i5k_amb_ids[] = { |
6e31eb2b DW |
491 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5000_ERR) }, |
492 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_5400_ERR) }, | |
493 | { 0, } | |
494 | }; | |
495 | MODULE_DEVICE_TABLE(pci, i5k_amb_ids); | |
c48a2916 | 496 | #endif |
6e31eb2b | 497 | |
6c931ae1 | 498 | static int i5k_amb_probe(struct platform_device *pdev) |
298c7524 DW |
499 | { |
500 | struct i5k_amb_data *data; | |
501 | struct resource *reso; | |
b4cb0d4d | 502 | int i, res; |
298c7524 DW |
503 | |
504 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
505 | if (!data) | |
506 | return -ENOMEM; | |
507 | ||
508 | /* Figure out where the AMB registers live */ | |
b8fdaf5a DW |
509 | i = 0; |
510 | do { | |
b4cb0d4d JD |
511 | res = i5k_find_amb_registers(data, chipset_ids[i].err); |
512 | if (res == 0) | |
513 | break; | |
b8fdaf5a | 514 | i++; |
b4cb0d4d | 515 | } while (chipset_ids[i].err); |
b8fdaf5a | 516 | |
298c7524 DW |
517 | if (res) |
518 | goto err; | |
519 | ||
520 | /* Copy the DIMM presence map for the first two channels */ | |
b4cb0d4d | 521 | res = i5k_channel_probe(&data->amb_present[0], chipset_ids[i].fbd0); |
298c7524 DW |
522 | if (res) |
523 | goto err; | |
524 | ||
525 | /* Copy the DIMM presence map for the optional second two channels */ | |
b4cb0d4d | 526 | i5k_channel_probe(&data->amb_present[2], chipset_ids[i].fbd0 + 1); |
298c7524 DW |
527 | |
528 | /* Set up resource regions */ | |
529 | reso = request_mem_region(data->amb_base, data->amb_len, DRVNAME); | |
530 | if (!reso) { | |
531 | res = -EBUSY; | |
532 | goto err; | |
533 | } | |
534 | ||
4bdc0d67 | 535 | data->amb_mmio = ioremap(data->amb_base, data->amb_len); |
298c7524 DW |
536 | if (!data->amb_mmio) { |
537 | res = -EBUSY; | |
538 | goto err_map_failed; | |
539 | } | |
540 | ||
541 | platform_set_drvdata(pdev, data); | |
542 | ||
543 | res = i5k_amb_hwmon_init(pdev); | |
544 | if (res) | |
545 | goto err_init_failed; | |
546 | ||
547 | return res; | |
548 | ||
549 | err_init_failed: | |
550 | iounmap(data->amb_mmio); | |
298c7524 DW |
551 | err_map_failed: |
552 | release_mem_region(data->amb_base, data->amb_len); | |
553 | err: | |
554 | kfree(data); | |
555 | return res; | |
556 | } | |
557 | ||
281dfd0b | 558 | static int i5k_amb_remove(struct platform_device *pdev) |
298c7524 DW |
559 | { |
560 | int i; | |
561 | struct i5k_amb_data *data = platform_get_drvdata(pdev); | |
562 | ||
563 | hwmon_device_unregister(data->hwmon_dev); | |
564 | device_remove_file(&pdev->dev, &dev_attr_name); | |
565 | for (i = 0; i < data->num_attrs; i++) | |
566 | device_remove_file(&pdev->dev, &data->attrs[i].s_attr.dev_attr); | |
567 | kfree(data->attrs); | |
568 | iounmap(data->amb_mmio); | |
569 | release_mem_region(data->amb_base, data->amb_len); | |
298c7524 DW |
570 | kfree(data); |
571 | return 0; | |
572 | } | |
573 | ||
574 | static struct platform_driver i5k_amb_driver = { | |
575 | .driver = { | |
298c7524 DW |
576 | .name = DRVNAME, |
577 | }, | |
578 | .probe = i5k_amb_probe, | |
9e5e9b7a | 579 | .remove = i5k_amb_remove, |
298c7524 DW |
580 | }; |
581 | ||
582 | static int __init i5k_amb_init(void) | |
583 | { | |
584 | int res; | |
585 | ||
586 | res = platform_driver_register(&i5k_amb_driver); | |
587 | if (res) | |
588 | return res; | |
589 | ||
590 | res = i5k_amb_add(); | |
591 | if (res) | |
592 | platform_driver_unregister(&i5k_amb_driver); | |
593 | ||
594 | return res; | |
595 | } | |
596 | ||
597 | static void __exit i5k_amb_exit(void) | |
598 | { | |
599 | platform_device_unregister(amb_pdev); | |
600 | platform_driver_unregister(&i5k_amb_driver); | |
601 | } | |
602 | ||
5407e051 | 603 | MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>"); |
298c7524 DW |
604 | MODULE_DESCRIPTION("Intel 5000 chipset FB-DIMM AMB temperature sensor"); |
605 | MODULE_LICENSE("GPL"); | |
606 | ||
607 | module_init(i5k_amb_init); | |
608 | module_exit(i5k_amb_exit); |