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hwmon: (ibmaem) Make instance initializations independent
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / hwmon / ibmaem.c
CommitLineData
8808a793 1/*
eb93b7df
DW		 2 * A hwmon driver for the IBM System Director Active Energy Manager (AEM)
3 * temperature/power/energy sensors and capping functionality.
8808a793
DW		 4 * Copyright (C) 2008 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
55d705cc
JP		 23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
8808a793
DW		 25#include <linux/ipmi.h>
26#include <linux/module.h>
27#include <linux/hwmon.h>
28#include <linux/hwmon-sysfs.h>
29#include <linux/jiffies.h>
30#include <linux/mutex.h>
31#include <linux/kdev_t.h>
32#include <linux/spinlock.h>
33#include <linux/idr.h>
5a0e3ad6 34#include <linux/slab.h>
8808a793
DW		 35#include <linux/sched.h>
36#include <linux/platform_device.h>
37#include <linux/math64.h>
38#include <linux/time.h>
39
40#define REFRESH_INTERVAL (HZ)
41#define IPMI_TIMEOUT (30 * HZ)
42#define DRVNAME "aem"
43
44#define AEM_NETFN 0x2E
45
46#define AEM_FIND_FW_CMD 0x80
47#define AEM_ELEMENT_CMD 0x81
48#define AEM_FW_INSTANCE_CMD 0x82
49
50#define AEM_READ_ELEMENT_CFG 0x80
51#define AEM_READ_BUFFER 0x81
52#define AEM_READ_REGISTER 0x82
53#define AEM_WRITE_REGISTER 0x83
54#define AEM_SET_REG_MASK 0x84
55#define AEM_CLEAR_REG_MASK 0x85
56#define AEM_READ_ELEMENT_CFG2 0x86
57
58#define AEM_CONTROL_ELEMENT 0
59#define AEM_ENERGY_ELEMENT 1
60#define AEM_CLOCK_ELEMENT 4
61#define AEM_POWER_CAP_ELEMENT 7
62#define AEM_EXHAUST_ELEMENT 9
63#define AEM_POWER_ELEMENT 10
64
65#define AEM_MODULE_TYPE_ID 0x0001
66
67#define AEM2_NUM_ENERGY_REGS 2
68#define AEM2_NUM_PCAP_REGS 6
69#define AEM2_NUM_TEMP_REGS 2
70#define AEM2_NUM_SENSORS 14
71
72#define AEM1_NUM_ENERGY_REGS 1
73#define AEM1_NUM_SENSORS 3
74
75/* AEM 2.x has more energy registers */
76#define AEM_NUM_ENERGY_REGS AEM2_NUM_ENERGY_REGS
77/* AEM 2.x needs more sensor files */
78#define AEM_NUM_SENSORS AEM2_NUM_SENSORS
79
80#define POWER_CAP 0
81#define POWER_CAP_MAX_HOTPLUG 1
82#define POWER_CAP_MAX 2
83#define POWER_CAP_MIN_WARNING 3
84#define POWER_CAP_MIN 4
85#define POWER_AUX 5
86
87#define AEM_DEFAULT_POWER_INTERVAL 1000
88#define AEM_MIN_POWER_INTERVAL 200
89#define UJ_PER_MJ 1000L
90
65807044 91static DEFINE_IDA(aem_ida);
8808a793 92
fe2d5ffc
DW		 93static struct platform_driver aem_driver = {
94 .driver = {
95 .name = DRVNAME,
96 .bus = &platform_bus_type,
97 }
8808a793
DW		 98};
99
100struct aem_ipmi_data {
101 struct completion read_complete;
102 struct ipmi_addr address;
103 ipmi_user_t user;
104 int interface;
105
106 struct kernel_ipmi_msg tx_message;
107 long tx_msgid;
108
109 void *rx_msg_data;
110 unsigned short rx_msg_len;
111 unsigned char rx_result;
112 int rx_recv_type;
113
114 struct device *bmc_device;
115};
116
117struct aem_ro_sensor_template {
118 char *label;
119 ssize_t (*show)(struct device *dev,
120 struct device_attribute *devattr,
121 char *buf);
122 int index;
123};
124
125struct aem_rw_sensor_template {
126 char *label;
127 ssize_t (*show)(struct device *dev,
128 struct device_attribute *devattr,
129 char *buf);
130 ssize_t (*set)(struct device *dev,
131 struct device_attribute *devattr,
132 const char *buf, size_t count);
133 int index;
134};
135
136struct aem_data {
137 struct list_head list;
138
139 struct device *hwmon_dev;
140 struct platform_device *pdev;
141 struct mutex lock;
142 char valid;
143 unsigned long last_updated; /* In jiffies */
144 u8 ver_major;
145 u8 ver_minor;
146 u8 module_handle;
147 int id;
148 struct aem_ipmi_data ipmi;
149
150 /* Function to update sensors */
151 void (*update)(struct aem_data *data);
152
153 /*
154 * AEM 1.x sensors:
155 * Available sensors:
156 * Energy meter
157 * Power meter
158 *
159 * AEM 2.x sensors:
160 * Two energy meters
161 * Two power meters
162 * Two temperature sensors
163 * Six power cap registers
164 */
165
166 /* sysfs attrs */
167 struct sensor_device_attribute sensors[AEM_NUM_SENSORS];
168
169 /* energy use in mJ */
170 u64 energy[AEM_NUM_ENERGY_REGS];
171
172 /* power sampling interval in ms */
173 unsigned long power_period[AEM_NUM_ENERGY_REGS];
174
175 /* Everything past here is for AEM2 only */
176
177 /* power caps in dW */
178 u16 pcap[AEM2_NUM_PCAP_REGS];
179
180 /* exhaust temperature in C */
181 u8 temp[AEM2_NUM_TEMP_REGS];
182};
183
184/* Data structures returned by the AEM firmware */
185struct aem_iana_id {
186 u8 bytes[3];
187};
188static struct aem_iana_id system_x_id = {
189 .bytes = {0x4D, 0x4F, 0x00}
190};
191
192/* These are used to find AEM1 instances */
193struct aem_find_firmware_req {
194 struct aem_iana_id id;
195 u8 rsvd;
a064d5bd
AV		 196 __be16 index;
197 __be16 module_type_id;
8808a793
DW		 198} __packed;
199
200struct aem_find_firmware_resp {
201 struct aem_iana_id id;
202 u8 num_instances;
203} __packed;
204
205/* These are used to find AEM2 instances */
206struct aem_find_instance_req {
207 struct aem_iana_id id;
208 u8 instance_number;
a064d5bd 209 __be16 module_type_id;
8808a793
DW		 210} __packed;
211
212struct aem_find_instance_resp {
213 struct aem_iana_id id;
214 u8 num_instances;
215 u8 major;
216 u8 minor;
217 u8 module_handle;
218 u16 record_id;
219} __packed;
220
221/* These are used to query sensors */
222struct aem_read_sensor_req {
223 struct aem_iana_id id;
224 u8 module_handle;
225 u8 element;
226 u8 subcommand;
227 u8 reg;
228 u8 rx_buf_size;
229} __packed;
230
231struct aem_read_sensor_resp {
232 struct aem_iana_id id;
233 u8 bytes[0];
234} __packed;
235
236/* Data structures to talk to the IPMI layer */
237struct aem_driver_data {
238 struct list_head aem_devices;
239 struct ipmi_smi_watcher bmc_events;
240 struct ipmi_user_hndl ipmi_hndlrs;
241};
242
243static void aem_register_bmc(int iface, struct device *dev);
244static void aem_bmc_gone(int iface);
245static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data);
246
247static void aem_remove_sensors(struct aem_data *data);
8808a793
DW		 248static int aem1_find_sensors(struct aem_data *data);
249static int aem2_find_sensors(struct aem_data *data);
250static void update_aem1_sensors(struct aem_data *data);
251static void update_aem2_sensors(struct aem_data *data);
252
253static struct aem_driver_data driver_data = {
254 .aem_devices = LIST_HEAD_INIT(driver_data.aem_devices),
255 .bmc_events = {
256 .owner = THIS_MODULE,
257 .new_smi = aem_register_bmc,
258 .smi_gone = aem_bmc_gone,
259 },
260 .ipmi_hndlrs = {
261 .ipmi_recv_hndl = aem_msg_handler,
262 },
263};
264
265/* Functions to talk to the IPMI layer */
266
267/* Initialize IPMI address, message buffers and user data */
268static int aem_init_ipmi_data(struct aem_ipmi_data *data, int iface,
269 struct device *bmc)
270{
271 int err;
272
273 init_completion(&data->read_complete);
274 data->bmc_device = bmc;
275
276 /* Initialize IPMI address */
277 data->address.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
278 data->address.channel = IPMI_BMC_CHANNEL;
279 data->address.data[0] = 0;
280 data->interface = iface;
281
282 /* Initialize message buffers */
283 data->tx_msgid = 0;
284 data->tx_message.netfn = AEM_NETFN;
285
286 /* Create IPMI messaging interface user */
287 err = ipmi_create_user(data->interface, &driver_data.ipmi_hndlrs,
288 data, &data->user);
289 if (err < 0) {
290 dev_err(bmc, "Unable to register user with IPMI "
291 "interface %d\n", data->interface);
292 return -EACCES;
293 }
294
295 return 0;
296}
297
298/* Send an IPMI command */
299static int aem_send_message(struct aem_ipmi_data *data)
300{
301 int err;
302
303 err = ipmi_validate_addr(&data->address, sizeof(data->address));
304 if (err)
305 goto out;
306
307 data->tx_msgid++;
308 err = ipmi_request_settime(data->user, &data->address, data->tx_msgid,
309 &data->tx_message, data, 0, 0, 0);
310 if (err)
311 goto out1;
312
313 return 0;
314out1:
315 dev_err(data->bmc_device, "request_settime=%x\n", err);
316 return err;
317out:
318 dev_err(data->bmc_device, "validate_addr=%x\n", err);
319 return err;
320}
321
322/* Dispatch IPMI messages to callers */
323static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data)
324{
325 unsigned short rx_len;
326 struct aem_ipmi_data *data = user_msg_data;
327
328 if (msg->msgid != data->tx_msgid) {
329 dev_err(data->bmc_device, "Mismatch between received msgid "
330 "(%02x) and transmitted msgid (%02x)!\n",
331 (int)msg->msgid,
332 (int)data->tx_msgid);
333 ipmi_free_recv_msg(msg);
334 return;
335 }
336
337 data->rx_recv_type = msg->recv_type;
338 if (msg->msg.data_len > 0)
339 data->rx_result = msg->msg.data[0];
340 else
341 data->rx_result = IPMI_UNKNOWN_ERR_COMPLETION_CODE;
342
343 if (msg->msg.data_len > 1) {
344 rx_len = msg->msg.data_len - 1;
345 if (data->rx_msg_len < rx_len)
346 rx_len = data->rx_msg_len;
347 data->rx_msg_len = rx_len;
348 memcpy(data->rx_msg_data, msg->msg.data + 1, data->rx_msg_len);
349 } else
350 data->rx_msg_len = 0;
351
352 ipmi_free_recv_msg(msg);
353 complete(&data->read_complete);
354}
355
8808a793
DW		 356/* Sensor support functions */
357
358/* Read a sensor value */
359static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg,
360 void *buf, size_t size)
361{
362 int rs_size, res;
363 struct aem_read_sensor_req rs_req;
364 struct aem_read_sensor_resp *rs_resp;
365 struct aem_ipmi_data *ipmi = &data->ipmi;
366
367 /* AEM registers are 1, 2, 4 or 8 bytes */
368 switch (size) {
369 case 1:
370 case 2:
371 case 4:
372 case 8:
373 break;
374 default:
375 return -EINVAL;
376 }
377
378 rs_req.id = system_x_id;
379 rs_req.module_handle = data->module_handle;
380 rs_req.element = elt;
381 rs_req.subcommand = AEM_READ_REGISTER;
382 rs_req.reg = reg;
383 rs_req.rx_buf_size = size;
384
385 ipmi->tx_message.cmd = AEM_ELEMENT_CMD;
386 ipmi->tx_message.data = (char *)&rs_req;
387 ipmi->tx_message.data_len = sizeof(rs_req);
388
389 rs_size = sizeof(*rs_resp) + size;
390 rs_resp = kzalloc(rs_size, GFP_KERNEL);
391 if (!rs_resp)
392 return -ENOMEM;
393
394 ipmi->rx_msg_data = rs_resp;
395 ipmi->rx_msg_len = rs_size;
396
397 aem_send_message(ipmi);
398
399 res = wait_for_completion_timeout(&ipmi->read_complete, IPMI_TIMEOUT);
66a89b21
JL		 400 if (!res) {
401 res = -ETIMEDOUT;
402 goto out;
403 }
8808a793
DW		 404
405 if (ipmi->rx_result || ipmi->rx_msg_len != rs_size ||
406 memcmp(&rs_resp->id, &system_x_id, sizeof(system_x_id))) {
66a89b21
JL		 407 res = -ENOENT;
408 goto out;
8808a793
DW		 409 }
410
411 switch (size) {
412 case 1: {
413 u8 *x = buf;
414 *x = rs_resp->bytes[0];
415 break;
416 }
417 case 2: {
418 u16 *x = buf;
a064d5bd 419 *x = be16_to_cpup((__be16 *)rs_resp->bytes);
8808a793
DW		 420 break;
421 }
422 case 4: {
423 u32 *x = buf;
a064d5bd 424 *x = be32_to_cpup((__be32 *)rs_resp->bytes);
8808a793
DW		 425 break;
426 }
427 case 8: {
428 u64 *x = buf;
a064d5bd 429 *x = be64_to_cpup((__be64 *)rs_resp->bytes);
8808a793
DW		 430 break;
431 }
432 }
66a89b21 433 res = 0;
8808a793 434
66a89b21
JL		 435out:
436 kfree(rs_resp);
437 return res;
8808a793
DW		 438}
439
440/* Update AEM energy registers */
bb15e7f2
DW		 441static void update_aem_energy_one(struct aem_data *data, int which)
442{
443 aem_read_sensor(data, AEM_ENERGY_ELEMENT, which,
444 &data->energy[which], 8);
445}
446
8808a793
DW		 447static void update_aem_energy(struct aem_data *data)
448{
bb15e7f2 449 update_aem_energy_one(data, 0);
8808a793
DW		 450 if (data->ver_major < 2)
451 return;
bb15e7f2 452 update_aem_energy_one(data, 1);
8808a793
DW		 453}
454
455/* Update all AEM1 sensors */
456static void update_aem1_sensors(struct aem_data *data)
457{
458 mutex_lock(&data->lock);
459 if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
460 data->valid)
461 goto out;
462
463 update_aem_energy(data);
464out:
465 mutex_unlock(&data->lock);
466}
467
468/* Update all AEM2 sensors */
469static void update_aem2_sensors(struct aem_data *data)
470{
471 int i;
472
473 mutex_lock(&data->lock);
474 if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
475 data->valid)
476 goto out;
477
478 update_aem_energy(data);
479 aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 0, &data->temp[0], 1);
480 aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 1, &data->temp[1], 1);
481
482 for (i = POWER_CAP; i <= POWER_AUX; i++)
483 aem_read_sensor(data, AEM_POWER_CAP_ELEMENT, i,
484 &data->pcap[i], 2);
485out:
486 mutex_unlock(&data->lock);
487}
488
489/* Delete an AEM instance */
490static void aem_delete(struct aem_data *data)
491{
492 list_del(&data->list);
493 aem_remove_sensors(data);
494 hwmon_device_unregister(data->hwmon_dev);
495 ipmi_destroy_user(data->ipmi.user);
95de3b25 496 platform_set_drvdata(data->pdev, NULL);
8808a793 497 platform_device_unregister(data->pdev);
65807044 498 ida_simple_remove(&aem_ida, data->id);
8808a793
DW		 499 kfree(data);
500}
501
502/* Probe functions for AEM1 devices */
503
504/* Retrieve version and module handle for an AEM1 instance */
505static int aem_find_aem1_count(struct aem_ipmi_data *data)
506{
507 int res;
508 struct aem_find_firmware_req ff_req;
509 struct aem_find_firmware_resp ff_resp;
510
511 ff_req.id = system_x_id;
512 ff_req.index = 0;
513 ff_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID);
514
515 data->tx_message.cmd = AEM_FIND_FW_CMD;
516 data->tx_message.data = (char *)&ff_req;
517 data->tx_message.data_len = sizeof(ff_req);
518
519 data->rx_msg_data = &ff_resp;
520 data->rx_msg_len = sizeof(ff_resp);
521
522 aem_send_message(data);
523
524 res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT);
525 if (!res)
526 return -ETIMEDOUT;
527
528 if (data->rx_result || data->rx_msg_len != sizeof(ff_resp) ||
529 memcmp(&ff_resp.id, &system_x_id, sizeof(system_x_id)))
530 return -ENOENT;
531
532 return ff_resp.num_instances;
533}
534
535/* Find and initialize one AEM1 instance */
536static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle)
537{
538 struct aem_data *data;
539 int i;
540 int res = -ENOMEM;
541
542 data = kzalloc(sizeof(*data), GFP_KERNEL);
543 if (!data)
544 return res;
545 mutex_init(&data->lock);
546
547 /* Copy instance data */
548 data->ver_major = 1;
549 data->ver_minor = 0;
550 data->module_handle = module_handle;
551 for (i = 0; i < AEM1_NUM_ENERGY_REGS; i++)
552 data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
553
554 /* Create sub-device for this fw instance */
65807044
JC		 555 data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL);
556 if (data->id < 0)
8808a793
DW		 557 goto id_err;
558
559 data->pdev = platform_device_alloc(DRVNAME, data->id);
560 if (!data->pdev)
561 goto dev_err;
fe2d5ffc 562 data->pdev->dev.driver = &aem_driver.driver;
8808a793
DW		 563
564 res = platform_device_add(data->pdev);
565 if (res)
566 goto ipmi_err;
567
95de3b25 568 platform_set_drvdata(data->pdev, data);
8808a793
DW		 569
570 /* Set up IPMI interface */
547a1c99
JD		 571 res = aem_init_ipmi_data(&data->ipmi, probe->interface,
572 probe->bmc_device);
573 if (res)
8808a793
DW		 574 goto ipmi_err;
575
576 /* Register with hwmon */
577 data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
8808a793
DW		 578 if (IS_ERR(data->hwmon_dev)) {
579 dev_err(&data->pdev->dev, "Unable to register hwmon "
580 "device for IPMI interface %d\n",
581 probe->interface);
547a1c99 582 res = PTR_ERR(data->hwmon_dev);
8808a793
DW		 583 goto hwmon_reg_err;
584 }
585
586 data->update = update_aem1_sensors;
587
588 /* Find sensors */
547a1c99
JD		 589 res = aem1_find_sensors(data);
590 if (res)
8808a793
DW		 591 goto sensor_err;
592
593 /* Add to our list of AEM devices */
594 list_add_tail(&data->list, &driver_data.aem_devices);
595
596 dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n",
597 data->ver_major, data->ver_minor,
598 data->module_handle);
599 return 0;
600
601sensor_err:
602 hwmon_device_unregister(data->hwmon_dev);
603hwmon_reg_err:
604 ipmi_destroy_user(data->ipmi.user);
605ipmi_err:
95de3b25 606 platform_set_drvdata(data->pdev, NULL);
8808a793
DW		 607 platform_device_unregister(data->pdev);
608dev_err:
65807044 609 ida_simple_remove(&aem_ida, data->id);
8808a793
DW		 610id_err:
611 kfree(data);
612
613 return res;
614}
615
616/* Find and initialize all AEM1 instances */
9d84c9e8 617static void aem_init_aem1(struct aem_ipmi_data *probe)
8808a793
DW		 618{
619 int num, i, err;
620
621 num = aem_find_aem1_count(probe);
622 for (i = 0; i < num; i++) {
623 err = aem_init_aem1_inst(probe, i);
624 if (err) {
625 dev_err(probe->bmc_device,
626 "Error %d initializing AEM1 0x%X\n",
627 err, i);
8808a793
DW		 628 }
629 }
8808a793
DW		 630}
631
632/* Probe functions for AEM2 devices */
633
634/* Retrieve version and module handle for an AEM2 instance */
635static int aem_find_aem2(struct aem_ipmi_data *data,
636 struct aem_find_instance_resp *fi_resp,
637 int instance_num)
638{
639 int res;
640 struct aem_find_instance_req fi_req;
641
642 fi_req.id = system_x_id;
643 fi_req.instance_number = instance_num;
644 fi_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID);
645
646 data->tx_message.cmd = AEM_FW_INSTANCE_CMD;
647 data->tx_message.data = (char *)&fi_req;
648 data->tx_message.data_len = sizeof(fi_req);
649
650 data->rx_msg_data = fi_resp;
651 data->rx_msg_len = sizeof(*fi_resp);
652
653 aem_send_message(data);
654
655 res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT);
656 if (!res)
657 return -ETIMEDOUT;
658
659 if (data->rx_result || data->rx_msg_len != sizeof(*fi_resp) ||
9c5413ea
DW		 660 memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id)) ||
661 fi_resp->num_instances <= instance_num)
8808a793
DW		 662 return -ENOENT;
663
664 return 0;
665}
666
667/* Find and initialize one AEM2 instance */
668static int aem_init_aem2_inst(struct aem_ipmi_data *probe,
669 struct aem_find_instance_resp *fi_resp)
670{
671 struct aem_data *data;
672 int i;
673 int res = -ENOMEM;
674
675 data = kzalloc(sizeof(*data), GFP_KERNEL);
676 if (!data)
677 return res;
678 mutex_init(&data->lock);
679
680 /* Copy instance data */
681 data->ver_major = fi_resp->major;
682 data->ver_minor = fi_resp->minor;
683 data->module_handle = fi_resp->module_handle;
684 for (i = 0; i < AEM2_NUM_ENERGY_REGS; i++)
685 data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
686
687 /* Create sub-device for this fw instance */
65807044
JC		 688 data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL);
689 if (data->id < 0)
8808a793
DW		 690 goto id_err;
691
692 data->pdev = platform_device_alloc(DRVNAME, data->id);
693 if (!data->pdev)
694 goto dev_err;
fe2d5ffc 695 data->pdev->dev.driver = &aem_driver.driver;
8808a793
DW		 696
697 res = platform_device_add(data->pdev);
698 if (res)
699 goto ipmi_err;
700
95de3b25 701 platform_set_drvdata(data->pdev, data);
8808a793
DW		 702
703 /* Set up IPMI interface */
547a1c99
JD		 704 res = aem_init_ipmi_data(&data->ipmi, probe->interface,
705 probe->bmc_device);
706 if (res)
8808a793
DW		 707 goto ipmi_err;
708
709 /* Register with hwmon */
710 data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
8808a793
DW		 711 if (IS_ERR(data->hwmon_dev)) {
712 dev_err(&data->pdev->dev, "Unable to register hwmon "
713 "device for IPMI interface %d\n",
714 probe->interface);
547a1c99 715 res = PTR_ERR(data->hwmon_dev);
8808a793
DW		 716 goto hwmon_reg_err;
717 }
718
719 data->update = update_aem2_sensors;
720
721 /* Find sensors */
547a1c99
JD		 722 res = aem2_find_sensors(data);
723 if (res)
8808a793
DW		 724 goto sensor_err;
725
726 /* Add to our list of AEM devices */
727 list_add_tail(&data->list, &driver_data.aem_devices);
728
729 dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n",
730 data->ver_major, data->ver_minor,
731 data->module_handle);
732 return 0;
733
734sensor_err:
735 hwmon_device_unregister(data->hwmon_dev);
736hwmon_reg_err:
737 ipmi_destroy_user(data->ipmi.user);
738ipmi_err:
95de3b25 739 platform_set_drvdata(data->pdev, NULL);
8808a793
DW		 740 platform_device_unregister(data->pdev);
741dev_err:
65807044 742 ida_simple_remove(&aem_ida, data->id);
8808a793
DW		 743id_err:
744 kfree(data);
745
746 return res;
747}
748
749/* Find and initialize all AEM2 instances */
9d84c9e8 750static void aem_init_aem2(struct aem_ipmi_data *probe)
8808a793
DW		 751{
752 struct aem_find_instance_resp fi_resp;
753 int err;
754 int i = 0;
755
756 while (!aem_find_aem2(probe, &fi_resp, i)) {
757 if (fi_resp.major != 2) {
758 dev_err(probe->bmc_device, "Unknown AEM v%d; please "
759 "report this to the maintainer.\n",
760 fi_resp.major);
761 i++;
762 continue;
763 }
764 err = aem_init_aem2_inst(probe, &fi_resp);
765 if (err) {
766 dev_err(probe->bmc_device,
767 "Error %d initializing AEM2 0x%X\n",
768 err, fi_resp.module_handle);
8808a793
DW		 769 }
770 i++;
771 }
8808a793
DW		 772}
773
774/* Probe a BMC for AEM firmware instances */
775static void aem_register_bmc(int iface, struct device *dev)
776{
777 struct aem_ipmi_data probe;
778
779 if (aem_init_ipmi_data(&probe, iface, dev))
780 return;
781
782 /* Ignore probe errors; they won't cause problems */
783 aem_init_aem1(&probe);
784 aem_init_aem2(&probe);
785
786 ipmi_destroy_user(probe.user);
787}
788
789/* Handle BMC deletion */
790static void aem_bmc_gone(int iface)
791{
792 struct aem_data *p1, *next1;
793
794 list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list)
795 if (p1->ipmi.interface == iface)
796 aem_delete(p1);
797}
798
799/* sysfs support functions */
800
801/* AEM device name */
802static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
803 char *buf)
804{
805 struct aem_data *data = dev_get_drvdata(dev);
806
807 return sprintf(buf, "%s%d\n", DRVNAME, data->ver_major);
808}
809static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
810
811/* AEM device version */
812static ssize_t show_version(struct device *dev,
813 struct device_attribute *devattr,
814 char *buf)
815{
816 struct aem_data *data = dev_get_drvdata(dev);
817
818 return sprintf(buf, "%d.%d\n", data->ver_major, data->ver_minor);
819}
820static SENSOR_DEVICE_ATTR(version, S_IRUGO, show_version, NULL, 0);
821
822/* Display power use */
823static ssize_t aem_show_power(struct device *dev,
824 struct device_attribute *devattr,
825 char *buf)
826{
827 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
828 struct aem_data *data = dev_get_drvdata(dev);
829 u64 before, after, delta, time;
830 signed long leftover;
831 struct timespec b, a;
832
833 mutex_lock(&data->lock);
bb15e7f2 834 update_aem_energy_one(data, attr->index);
8808a793
DW		 835 getnstimeofday(&b);
836 before = data->energy[attr->index];
837
838 leftover = schedule_timeout_interruptible(
839 msecs_to_jiffies(data->power_period[attr->index])
840 );
841 if (leftover) {
842 mutex_unlock(&data->lock);
843 return 0;
844 }
845
bb15e7f2 846 update_aem_energy_one(data, attr->index);
8808a793
DW		 847 getnstimeofday(&a);
848 after = data->energy[attr->index];
849 mutex_unlock(&data->lock);
850
851 time = timespec_to_ns(&a) - timespec_to_ns(&b);
852 delta = (after - before) * UJ_PER_MJ;
853
854 return sprintf(buf, "%llu\n",
855 (unsigned long long)div64_u64(delta * NSEC_PER_SEC, time));
856}
857
858/* Display energy use */
859static ssize_t aem_show_energy(struct device *dev,
860 struct device_attribute *devattr,
861 char *buf)
862{
863 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
864 struct aem_data *a = dev_get_drvdata(dev);
bb15e7f2
DW		 865 mutex_lock(&a->lock);
866 update_aem_energy_one(a, attr->index);
867 mutex_unlock(&a->lock);
8808a793
DW		 868
869 return sprintf(buf, "%llu\n",
870 (unsigned long long)a->energy[attr->index] * 1000);
871}
872
873/* Display power interval registers */
874static ssize_t aem_show_power_period(struct device *dev,
875 struct device_attribute *devattr,
876 char *buf)
877{
878 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
879 struct aem_data *a = dev_get_drvdata(dev);
880 a->update(a);
881
882 return sprintf(buf, "%lu\n", a->power_period[attr->index]);
883}
884
885/* Set power interval registers */
886static ssize_t aem_set_power_period(struct device *dev,
887 struct device_attribute *devattr,
888 const char *buf, size_t count)
889{
890 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
891 struct aem_data *a = dev_get_drvdata(dev);
892 unsigned long temp;
893 int res;
894
895 res = strict_strtoul(buf, 10, &temp);
896 if (res)
897 return res;
898
899 if (temp < AEM_MIN_POWER_INTERVAL)
900 return -EINVAL;
901
902 mutex_lock(&a->lock);
903 a->power_period[attr->index] = temp;
904 mutex_unlock(&a->lock);
905
906 return count;
907}
908
909/* Discover sensors on an AEM device */
910static int aem_register_sensors(struct aem_data *data,
911 struct aem_ro_sensor_template *ro,
912 struct aem_rw_sensor_template *rw)
913{
914 struct device *dev = &data->pdev->dev;
915 struct sensor_device_attribute *sensors = data->sensors;
916 int err;
917
918 /* Set up read-only sensors */
919 while (ro->label) {
3cdb2052 920 sysfs_attr_init(&sensors->dev_attr.attr);
8808a793
DW		 921 sensors->dev_attr.attr.name = ro->label;
922 sensors->dev_attr.attr.mode = S_IRUGO;
923 sensors->dev_attr.show = ro->show;
924 sensors->index = ro->index;
925
926 err = device_create_file(dev, &sensors->dev_attr);
927 if (err) {
928 sensors->dev_attr.attr.name = NULL;
929 goto error;
930 }
931 sensors++;
932 ro++;
933 }
934
935 /* Set up read-write sensors */
936 while (rw->label) {
3cdb2052 937 sysfs_attr_init(&sensors->dev_attr.attr);
8808a793
DW		 938 sensors->dev_attr.attr.name = rw->label;
939 sensors->dev_attr.attr.mode = S_IRUGO | S_IWUSR;
940 sensors->dev_attr.show = rw->show;
941 sensors->dev_attr.store = rw->set;
942 sensors->index = rw->index;
943
944 err = device_create_file(dev, &sensors->dev_attr);
945 if (err) {
946 sensors->dev_attr.attr.name = NULL;
947 goto error;
948 }
949 sensors++;
950 rw++;
951 }
952
953 err = device_create_file(dev, &sensor_dev_attr_name.dev_attr);
954 if (err)
955 goto error;
956 err = device_create_file(dev, &sensor_dev_attr_version.dev_attr);
957 return err;
958
959error:
960 aem_remove_sensors(data);
961 return err;
962}
963
964/* sysfs support functions for AEM2 sensors */
965
966/* Display temperature use */
967static ssize_t aem2_show_temp(struct device *dev,
968 struct device_attribute *devattr,
969 char *buf)
970{
971 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
972 struct aem_data *a = dev_get_drvdata(dev);
973 a->update(a);
974
975 return sprintf(buf, "%u\n", a->temp[attr->index] * 1000);
976}
977
978/* Display power-capping registers */
979static ssize_t aem2_show_pcap_value(struct device *dev,
980 struct device_attribute *devattr,
981 char *buf)
982{
983 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
984 struct aem_data *a = dev_get_drvdata(dev);
985 a->update(a);
986
987 return sprintf(buf, "%u\n", a->pcap[attr->index] * 100000);
988}
989
990/* Remove sensors attached to an AEM device */
991static void aem_remove_sensors(struct aem_data *data)
992{
993 int i;
994
995 for (i = 0; i < AEM_NUM_SENSORS; i++) {
996 if (!data->sensors[i].dev_attr.attr.name)
997 continue;
998 device_remove_file(&data->pdev->dev,
999 &data->sensors[i].dev_attr);
1000 }
1001
1002 device_remove_file(&data->pdev->dev,
1003 &sensor_dev_attr_name.dev_attr);
1004 device_remove_file(&data->pdev->dev,
1005 &sensor_dev_attr_version.dev_attr);
1006}
1007
1008/* Sensor probe functions */
1009
1010/* Description of AEM1 sensors */
1011static struct aem_ro_sensor_template aem1_ro_sensors[] = {
1012{"energy1_input", aem_show_energy, 0},
1013{"power1_average", aem_show_power, 0},
1014{NULL, NULL, 0},
1015};
1016
1017static struct aem_rw_sensor_template aem1_rw_sensors[] = {
1018{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
1019{NULL, NULL, NULL, 0},
1020};
1021
1022/* Description of AEM2 sensors */
1023static struct aem_ro_sensor_template aem2_ro_sensors[] = {
1024{"energy1_input", aem_show_energy, 0},
1025{"energy2_input", aem_show_energy, 1},
1026{"power1_average", aem_show_power, 0},
1027{"power2_average", aem_show_power, 1},
1028{"temp1_input", aem2_show_temp, 0},
1029{"temp2_input", aem2_show_temp, 1},
1030
1031{"power4_average", aem2_show_pcap_value, POWER_CAP_MAX_HOTPLUG},
1032{"power5_average", aem2_show_pcap_value, POWER_CAP_MAX},
1033{"power6_average", aem2_show_pcap_value, POWER_CAP_MIN_WARNING},
1034{"power7_average", aem2_show_pcap_value, POWER_CAP_MIN},
1035
1036{"power3_average", aem2_show_pcap_value, POWER_AUX},
1037{"power_cap", aem2_show_pcap_value, POWER_CAP},
1038{NULL, NULL, 0},
1039};
1040
1041static struct aem_rw_sensor_template aem2_rw_sensors[] = {
1042{"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
1043{"power2_average_interval", aem_show_power_period, aem_set_power_period, 1},
1044{NULL, NULL, NULL, 0},
1045};
1046
1047/* Set up AEM1 sensor attrs */
1048static int aem1_find_sensors(struct aem_data *data)
1049{
1050 return aem_register_sensors(data, aem1_ro_sensors, aem1_rw_sensors);
1051}
1052
1053/* Set up AEM2 sensor attrs */
1054static int aem2_find_sensors(struct aem_data *data)
1055{
1056 return aem_register_sensors(data, aem2_ro_sensors, aem2_rw_sensors);
1057}
1058
1059/* Module init/exit routines */
1060
1061static int __init aem_init(void)
1062{
1063 int res;
1064
fe2d5ffc 1065 res = driver_register(&aem_driver.driver);
8808a793 1066 if (res) {
55d705cc 1067 pr_err("Can't register aem driver\n");
8808a793
DW		 1068 return res;
1069 }
1070
1071 res = ipmi_smi_watcher_register(&driver_data.bmc_events);
1072 if (res)
1073 goto ipmi_reg_err;
1074 return 0;
1075
1076ipmi_reg_err:
fe2d5ffc 1077 driver_unregister(&aem_driver.driver);
8808a793
DW		 1078 return res;
1079
1080}
1081
1082static void __exit aem_exit(void)
1083{
1084 struct aem_data *p1, *next1;
1085
1086 ipmi_smi_watcher_unregister(&driver_data.bmc_events);
fe2d5ffc 1087 driver_unregister(&aem_driver.driver);
8808a793
DW		 1088 list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list)
1089 aem_delete(p1);
1090}
1091
1092MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
eb93b7df 1093MODULE_DESCRIPTION("IBM AEM power/temp/energy sensor driver");
8808a793
DW		 1094MODULE_LICENSE("GPL");
1095
1096module_init(aem_init);
1097module_exit(aem_exit);
21d93c14
DW		 1098
1099MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3350-*");
1100MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3550-*");
1101MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3650-*");
1102MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3655-*");
1103MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3755-*");
1104MODULE_ALIAS("dmi:bvnIBM:*:pnIBM3850M2/x3950M2-*");
8070408b 1105MODULE_ALIAS("dmi:bvnIBM:*:pnIBMBladeHC10-*");
kernel source for telekom puls (alcatel/mediatek)