2 * A hwmon driver for the IBM System Director Active Energy Manager (AEM)
3 * temperature/power/energy sensors and capping functionality.
4 * Copyright (C) 2008 IBM
6 * Author: Darrick J. Wong <djwong@us.ibm.com>
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.
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.
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
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
34 #include <linux/slab.h>
35 #include <linux/sched.h>
36 #include <linux/platform_device.h>
37 #include <linux/math64.h>
38 #include <linux/time.h>
39 #include <linux/err.h>
41 #define REFRESH_INTERVAL (HZ)
42 #define IPMI_TIMEOUT (30 * HZ)
45 #define AEM_NETFN 0x2E
47 #define AEM_FIND_FW_CMD 0x80
48 #define AEM_ELEMENT_CMD 0x81
49 #define AEM_FW_INSTANCE_CMD 0x82
51 #define AEM_READ_ELEMENT_CFG 0x80
52 #define AEM_READ_BUFFER 0x81
53 #define AEM_READ_REGISTER 0x82
54 #define AEM_WRITE_REGISTER 0x83
55 #define AEM_SET_REG_MASK 0x84
56 #define AEM_CLEAR_REG_MASK 0x85
57 #define AEM_READ_ELEMENT_CFG2 0x86
59 #define AEM_CONTROL_ELEMENT 0
60 #define AEM_ENERGY_ELEMENT 1
61 #define AEM_CLOCK_ELEMENT 4
62 #define AEM_POWER_CAP_ELEMENT 7
63 #define AEM_EXHAUST_ELEMENT 9
64 #define AEM_POWER_ELEMENT 10
66 #define AEM_MODULE_TYPE_ID 0x0001
68 #define AEM2_NUM_ENERGY_REGS 2
69 #define AEM2_NUM_PCAP_REGS 6
70 #define AEM2_NUM_TEMP_REGS 2
71 #define AEM2_NUM_SENSORS 14
73 #define AEM1_NUM_ENERGY_REGS 1
74 #define AEM1_NUM_SENSORS 3
76 /* AEM 2.x has more energy registers */
77 #define AEM_NUM_ENERGY_REGS AEM2_NUM_ENERGY_REGS
78 /* AEM 2.x needs more sensor files */
79 #define AEM_NUM_SENSORS AEM2_NUM_SENSORS
82 #define POWER_CAP_MAX_HOTPLUG 1
83 #define POWER_CAP_MAX 2
84 #define POWER_CAP_MIN_WARNING 3
85 #define POWER_CAP_MIN 4
88 #define AEM_DEFAULT_POWER_INTERVAL 1000
89 #define AEM_MIN_POWER_INTERVAL 200
90 #define UJ_PER_MJ 1000L
92 static DEFINE_IDA(aem_ida);
94 static struct platform_driver aem_driver = {
97 .bus = &platform_bus_type,
101 struct aem_ipmi_data {
102 struct completion read_complete;
103 struct ipmi_addr address;
107 struct kernel_ipmi_msg tx_message;
111 unsigned short rx_msg_len;
112 unsigned char rx_result;
115 struct device *bmc_device;
118 struct aem_ro_sensor_template {
120 ssize_t (*show)(struct device *dev,
121 struct device_attribute *devattr,
126 struct aem_rw_sensor_template {
128 ssize_t (*show)(struct device *dev,
129 struct device_attribute *devattr,
131 ssize_t (*set)(struct device *dev,
132 struct device_attribute *devattr,
133 const char *buf, size_t count);
138 struct list_head list;
140 struct device *hwmon_dev;
141 struct platform_device *pdev;
144 unsigned long last_updated; /* In jiffies */
149 struct aem_ipmi_data ipmi;
151 /* Function and buffer to update sensors */
152 void (*update)(struct aem_data *data);
153 struct aem_read_sensor_resp *rs_resp;
164 * Two temperature sensors
165 * Six power cap registers
169 struct sensor_device_attribute sensors[AEM_NUM_SENSORS];
171 /* energy use in mJ */
172 u64 energy[AEM_NUM_ENERGY_REGS];
174 /* power sampling interval in ms */
175 unsigned long power_period[AEM_NUM_ENERGY_REGS];
177 /* Everything past here is for AEM2 only */
179 /* power caps in dW */
180 u16 pcap[AEM2_NUM_PCAP_REGS];
182 /* exhaust temperature in C */
183 u8 temp[AEM2_NUM_TEMP_REGS];
186 /* Data structures returned by the AEM firmware */
190 static struct aem_iana_id system_x_id = {
191 .bytes = {0x4D, 0x4F, 0x00}
194 /* These are used to find AEM1 instances */
195 struct aem_find_firmware_req {
196 struct aem_iana_id id;
199 __be16 module_type_id;
202 struct aem_find_firmware_resp {
203 struct aem_iana_id id;
207 /* These are used to find AEM2 instances */
208 struct aem_find_instance_req {
209 struct aem_iana_id id;
211 __be16 module_type_id;
214 struct aem_find_instance_resp {
215 struct aem_iana_id id;
223 /* These are used to query sensors */
224 struct aem_read_sensor_req {
225 struct aem_iana_id id;
233 struct aem_read_sensor_resp {
234 struct aem_iana_id id;
238 /* Data structures to talk to the IPMI layer */
239 struct aem_driver_data {
240 struct list_head aem_devices;
241 struct ipmi_smi_watcher bmc_events;
242 struct ipmi_user_hndl ipmi_hndlrs;
245 static void aem_register_bmc(int iface, struct device *dev);
246 static void aem_bmc_gone(int iface);
247 static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data);
249 static void aem_remove_sensors(struct aem_data *data);
250 static int aem1_find_sensors(struct aem_data *data);
251 static int aem2_find_sensors(struct aem_data *data);
252 static void update_aem1_sensors(struct aem_data *data);
253 static void update_aem2_sensors(struct aem_data *data);
255 static struct aem_driver_data driver_data = {
256 .aem_devices = LIST_HEAD_INIT(driver_data.aem_devices),
258 .owner = THIS_MODULE,
259 .new_smi = aem_register_bmc,
260 .smi_gone = aem_bmc_gone,
263 .ipmi_recv_hndl = aem_msg_handler,
267 /* Functions to talk to the IPMI layer */
269 /* Initialize IPMI address, message buffers and user data */
270 static int aem_init_ipmi_data(struct aem_ipmi_data *data, int iface,
275 init_completion(&data->read_complete);
276 data->bmc_device = bmc;
278 /* Initialize IPMI address */
279 data->address.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
280 data->address.channel = IPMI_BMC_CHANNEL;
281 data->address.data[0] = 0;
282 data->interface = iface;
284 /* Initialize message buffers */
286 data->tx_message.netfn = AEM_NETFN;
288 /* Create IPMI messaging interface user */
289 err = ipmi_create_user(data->interface, &driver_data.ipmi_hndlrs,
292 dev_err(bmc, "Unable to register user with IPMI "
293 "interface %d\n", data->interface);
300 /* Send an IPMI command */
301 static int aem_send_message(struct aem_ipmi_data *data)
305 err = ipmi_validate_addr(&data->address, sizeof(data->address));
310 err = ipmi_request_settime(data->user, &data->address, data->tx_msgid,
311 &data->tx_message, data, 0, 0, 0);
317 dev_err(data->bmc_device, "request_settime=%x\n", err);
320 dev_err(data->bmc_device, "validate_addr=%x\n", err);
324 /* Dispatch IPMI messages to callers */
325 static void aem_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data)
327 unsigned short rx_len;
328 struct aem_ipmi_data *data = user_msg_data;
330 if (msg->msgid != data->tx_msgid) {
331 dev_err(data->bmc_device, "Mismatch between received msgid "
332 "(%02x) and transmitted msgid (%02x)!\n",
334 (int)data->tx_msgid);
335 ipmi_free_recv_msg(msg);
339 data->rx_recv_type = msg->recv_type;
340 if (msg->msg.data_len > 0)
341 data->rx_result = msg->msg.data[0];
343 data->rx_result = IPMI_UNKNOWN_ERR_COMPLETION_CODE;
345 if (msg->msg.data_len > 1) {
346 rx_len = msg->msg.data_len - 1;
347 if (data->rx_msg_len < rx_len)
348 rx_len = data->rx_msg_len;
349 data->rx_msg_len = rx_len;
350 memcpy(data->rx_msg_data, msg->msg.data + 1, data->rx_msg_len);
352 data->rx_msg_len = 0;
354 ipmi_free_recv_msg(msg);
355 complete(&data->read_complete);
358 /* Sensor support functions */
360 /* Read a sensor value; must be called with data->lock held */
361 static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg,
362 void *buf, size_t size)
365 struct aem_read_sensor_req rs_req;
366 /* Use preallocated rx buffer */
367 struct aem_read_sensor_resp *rs_resp = data->rs_resp;
368 struct aem_ipmi_data *ipmi = &data->ipmi;
370 /* AEM registers are 1, 2, 4 or 8 bytes */
381 rs_req.id = system_x_id;
382 rs_req.module_handle = data->module_handle;
383 rs_req.element = elt;
384 rs_req.subcommand = AEM_READ_REGISTER;
386 rs_req.rx_buf_size = size;
388 ipmi->tx_message.cmd = AEM_ELEMENT_CMD;
389 ipmi->tx_message.data = (char *)&rs_req;
390 ipmi->tx_message.data_len = sizeof(rs_req);
392 rs_size = sizeof(*rs_resp) + size;
393 ipmi->rx_msg_data = rs_resp;
394 ipmi->rx_msg_len = rs_size;
396 aem_send_message(ipmi);
398 res = wait_for_completion_timeout(&ipmi->read_complete, IPMI_TIMEOUT);
404 if (ipmi->rx_result || ipmi->rx_msg_len != rs_size ||
405 memcmp(&rs_resp->id, &system_x_id, sizeof(system_x_id))) {
413 *x = rs_resp->bytes[0];
418 *x = be16_to_cpup((__be16 *)rs_resp->bytes);
423 *x = be32_to_cpup((__be32 *)rs_resp->bytes);
428 *x = be64_to_cpup((__be64 *)rs_resp->bytes);
438 /* Update AEM energy registers */
439 static void update_aem_energy_one(struct aem_data *data, int which)
441 aem_read_sensor(data, AEM_ENERGY_ELEMENT, which,
442 &data->energy[which], 8);
445 static void update_aem_energy(struct aem_data *data)
447 update_aem_energy_one(data, 0);
448 if (data->ver_major < 2)
450 update_aem_energy_one(data, 1);
453 /* Update all AEM1 sensors */
454 static void update_aem1_sensors(struct aem_data *data)
456 mutex_lock(&data->lock);
457 if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
461 update_aem_energy(data);
463 mutex_unlock(&data->lock);
466 /* Update all AEM2 sensors */
467 static void update_aem2_sensors(struct aem_data *data)
471 mutex_lock(&data->lock);
472 if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
476 update_aem_energy(data);
477 aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 0, &data->temp[0], 1);
478 aem_read_sensor(data, AEM_EXHAUST_ELEMENT, 1, &data->temp[1], 1);
480 for (i = POWER_CAP; i <= POWER_AUX; i++)
481 aem_read_sensor(data, AEM_POWER_CAP_ELEMENT, i,
484 mutex_unlock(&data->lock);
487 /* Delete an AEM instance */
488 static void aem_delete(struct aem_data *data)
490 list_del(&data->list);
491 aem_remove_sensors(data);
492 kfree(data->rs_resp);
493 hwmon_device_unregister(data->hwmon_dev);
494 ipmi_destroy_user(data->ipmi.user);
495 platform_set_drvdata(data->pdev, NULL);
496 platform_device_unregister(data->pdev);
497 ida_simple_remove(&aem_ida, data->id);
501 /* Probe functions for AEM1 devices */
503 /* Retrieve version and module handle for an AEM1 instance */
504 static int aem_find_aem1_count(struct aem_ipmi_data *data)
507 struct aem_find_firmware_req ff_req;
508 struct aem_find_firmware_resp ff_resp;
510 ff_req.id = system_x_id;
512 ff_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID);
514 data->tx_message.cmd = AEM_FIND_FW_CMD;
515 data->tx_message.data = (char *)&ff_req;
516 data->tx_message.data_len = sizeof(ff_req);
518 data->rx_msg_data = &ff_resp;
519 data->rx_msg_len = sizeof(ff_resp);
521 aem_send_message(data);
523 res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT);
527 if (data->rx_result || data->rx_msg_len != sizeof(ff_resp) ||
528 memcmp(&ff_resp.id, &system_x_id, sizeof(system_x_id)))
531 return ff_resp.num_instances;
534 /* Find and initialize one AEM1 instance */
535 static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle)
537 struct aem_data *data;
541 data = kzalloc(sizeof(*data), GFP_KERNEL);
544 mutex_init(&data->lock);
546 /* Copy instance data */
549 data->module_handle = module_handle;
550 for (i = 0; i < AEM1_NUM_ENERGY_REGS; i++)
551 data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
553 /* Create sub-device for this fw instance */
554 data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL);
558 data->pdev = platform_device_alloc(DRVNAME, data->id);
561 data->pdev->dev.driver = &aem_driver.driver;
563 res = platform_device_add(data->pdev);
567 platform_set_drvdata(data->pdev, data);
569 /* Set up IPMI interface */
570 res = aem_init_ipmi_data(&data->ipmi, probe->interface,
575 /* Register with hwmon */
576 data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
577 if (IS_ERR(data->hwmon_dev)) {
578 dev_err(&data->pdev->dev, "Unable to register hwmon "
579 "device for IPMI interface %d\n",
581 res = PTR_ERR(data->hwmon_dev);
585 data->update = update_aem1_sensors;
586 data->rs_resp = kzalloc(sizeof(*(data->rs_resp)) + 8, GFP_KERNEL);
587 if (!data->rs_resp) {
593 res = aem1_find_sensors(data);
597 /* Add to our list of AEM devices */
598 list_add_tail(&data->list, &driver_data.aem_devices);
600 dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n",
601 data->ver_major, data->ver_minor,
602 data->module_handle);
606 kfree(data->rs_resp);
608 hwmon_device_unregister(data->hwmon_dev);
610 ipmi_destroy_user(data->ipmi.user);
612 platform_set_drvdata(data->pdev, NULL);
613 platform_device_unregister(data->pdev);
615 ida_simple_remove(&aem_ida, data->id);
622 /* Find and initialize all AEM1 instances */
623 static void aem_init_aem1(struct aem_ipmi_data *probe)
627 num = aem_find_aem1_count(probe);
628 for (i = 0; i < num; i++) {
629 err = aem_init_aem1_inst(probe, i);
631 dev_err(probe->bmc_device,
632 "Error %d initializing AEM1 0x%X\n",
638 /* Probe functions for AEM2 devices */
640 /* Retrieve version and module handle for an AEM2 instance */
641 static int aem_find_aem2(struct aem_ipmi_data *data,
642 struct aem_find_instance_resp *fi_resp,
646 struct aem_find_instance_req fi_req;
648 fi_req.id = system_x_id;
649 fi_req.instance_number = instance_num;
650 fi_req.module_type_id = cpu_to_be16(AEM_MODULE_TYPE_ID);
652 data->tx_message.cmd = AEM_FW_INSTANCE_CMD;
653 data->tx_message.data = (char *)&fi_req;
654 data->tx_message.data_len = sizeof(fi_req);
656 data->rx_msg_data = fi_resp;
657 data->rx_msg_len = sizeof(*fi_resp);
659 aem_send_message(data);
661 res = wait_for_completion_timeout(&data->read_complete, IPMI_TIMEOUT);
665 if (data->rx_result || data->rx_msg_len != sizeof(*fi_resp) ||
666 memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id)) ||
667 fi_resp->num_instances <= instance_num)
673 /* Find and initialize one AEM2 instance */
674 static int aem_init_aem2_inst(struct aem_ipmi_data *probe,
675 struct aem_find_instance_resp *fi_resp)
677 struct aem_data *data;
681 data = kzalloc(sizeof(*data), GFP_KERNEL);
684 mutex_init(&data->lock);
686 /* Copy instance data */
687 data->ver_major = fi_resp->major;
688 data->ver_minor = fi_resp->minor;
689 data->module_handle = fi_resp->module_handle;
690 for (i = 0; i < AEM2_NUM_ENERGY_REGS; i++)
691 data->power_period[i] = AEM_DEFAULT_POWER_INTERVAL;
693 /* Create sub-device for this fw instance */
694 data->id = ida_simple_get(&aem_ida, 0, 0, GFP_KERNEL);
698 data->pdev = platform_device_alloc(DRVNAME, data->id);
701 data->pdev->dev.driver = &aem_driver.driver;
703 res = platform_device_add(data->pdev);
707 platform_set_drvdata(data->pdev, data);
709 /* Set up IPMI interface */
710 res = aem_init_ipmi_data(&data->ipmi, probe->interface,
715 /* Register with hwmon */
716 data->hwmon_dev = hwmon_device_register(&data->pdev->dev);
717 if (IS_ERR(data->hwmon_dev)) {
718 dev_err(&data->pdev->dev, "Unable to register hwmon "
719 "device for IPMI interface %d\n",
721 res = PTR_ERR(data->hwmon_dev);
725 data->update = update_aem2_sensors;
726 data->rs_resp = kzalloc(sizeof(*(data->rs_resp)) + 8, GFP_KERNEL);
727 if (!data->rs_resp) {
733 res = aem2_find_sensors(data);
737 /* Add to our list of AEM devices */
738 list_add_tail(&data->list, &driver_data.aem_devices);
740 dev_info(data->ipmi.bmc_device, "Found AEM v%d.%d at 0x%X\n",
741 data->ver_major, data->ver_minor,
742 data->module_handle);
746 kfree(data->rs_resp);
748 hwmon_device_unregister(data->hwmon_dev);
750 ipmi_destroy_user(data->ipmi.user);
752 platform_set_drvdata(data->pdev, NULL);
753 platform_device_unregister(data->pdev);
755 ida_simple_remove(&aem_ida, data->id);
762 /* Find and initialize all AEM2 instances */
763 static void aem_init_aem2(struct aem_ipmi_data *probe)
765 struct aem_find_instance_resp fi_resp;
769 while (!aem_find_aem2(probe, &fi_resp, i)) {
770 if (fi_resp.major != 2) {
771 dev_err(probe->bmc_device, "Unknown AEM v%d; please "
772 "report this to the maintainer.\n",
777 err = aem_init_aem2_inst(probe, &fi_resp);
779 dev_err(probe->bmc_device,
780 "Error %d initializing AEM2 0x%X\n",
781 err, fi_resp.module_handle);
787 /* Probe a BMC for AEM firmware instances */
788 static void aem_register_bmc(int iface, struct device *dev)
790 struct aem_ipmi_data probe;
792 if (aem_init_ipmi_data(&probe, iface, dev))
795 /* Ignore probe errors; they won't cause problems */
796 aem_init_aem1(&probe);
797 aem_init_aem2(&probe);
799 ipmi_destroy_user(probe.user);
802 /* Handle BMC deletion */
803 static void aem_bmc_gone(int iface)
805 struct aem_data *p1, *next1;
807 list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list)
808 if (p1->ipmi.interface == iface)
812 /* sysfs support functions */
814 /* AEM device name */
815 static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
818 struct aem_data *data = dev_get_drvdata(dev);
820 return sprintf(buf, "%s%d\n", DRVNAME, data->ver_major);
822 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
824 /* AEM device version */
825 static ssize_t show_version(struct device *dev,
826 struct device_attribute *devattr,
829 struct aem_data *data = dev_get_drvdata(dev);
831 return sprintf(buf, "%d.%d\n", data->ver_major, data->ver_minor);
833 static SENSOR_DEVICE_ATTR(version, S_IRUGO, show_version, NULL, 0);
835 /* Display power use */
836 static ssize_t aem_show_power(struct device *dev,
837 struct device_attribute *devattr,
840 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
841 struct aem_data *data = dev_get_drvdata(dev);
842 u64 before, after, delta, time;
843 signed long leftover;
844 struct timespec b, a;
846 mutex_lock(&data->lock);
847 update_aem_energy_one(data, attr->index);
849 before = data->energy[attr->index];
851 leftover = schedule_timeout_interruptible(
852 msecs_to_jiffies(data->power_period[attr->index])
855 mutex_unlock(&data->lock);
859 update_aem_energy_one(data, attr->index);
861 after = data->energy[attr->index];
862 mutex_unlock(&data->lock);
864 time = timespec_to_ns(&a) - timespec_to_ns(&b);
865 delta = (after - before) * UJ_PER_MJ;
867 return sprintf(buf, "%llu\n",
868 (unsigned long long)div64_u64(delta * NSEC_PER_SEC, time));
871 /* Display energy use */
872 static ssize_t aem_show_energy(struct device *dev,
873 struct device_attribute *devattr,
876 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
877 struct aem_data *a = dev_get_drvdata(dev);
878 mutex_lock(&a->lock);
879 update_aem_energy_one(a, attr->index);
880 mutex_unlock(&a->lock);
882 return sprintf(buf, "%llu\n",
883 (unsigned long long)a->energy[attr->index] * 1000);
886 /* Display power interval registers */
887 static ssize_t aem_show_power_period(struct device *dev,
888 struct device_attribute *devattr,
891 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
892 struct aem_data *a = dev_get_drvdata(dev);
895 return sprintf(buf, "%lu\n", a->power_period[attr->index]);
898 /* Set power interval registers */
899 static ssize_t aem_set_power_period(struct device *dev,
900 struct device_attribute *devattr,
901 const char *buf, size_t count)
903 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
904 struct aem_data *a = dev_get_drvdata(dev);
908 res = kstrtoul(buf, 10, &temp);
912 if (temp < AEM_MIN_POWER_INTERVAL)
915 mutex_lock(&a->lock);
916 a->power_period[attr->index] = temp;
917 mutex_unlock(&a->lock);
922 /* Discover sensors on an AEM device */
923 static int aem_register_sensors(struct aem_data *data,
924 struct aem_ro_sensor_template *ro,
925 struct aem_rw_sensor_template *rw)
927 struct device *dev = &data->pdev->dev;
928 struct sensor_device_attribute *sensors = data->sensors;
931 /* Set up read-only sensors */
933 sysfs_attr_init(&sensors->dev_attr.attr);
934 sensors->dev_attr.attr.name = ro->label;
935 sensors->dev_attr.attr.mode = S_IRUGO;
936 sensors->dev_attr.show = ro->show;
937 sensors->index = ro->index;
939 err = device_create_file(dev, &sensors->dev_attr);
941 sensors->dev_attr.attr.name = NULL;
948 /* Set up read-write sensors */
950 sysfs_attr_init(&sensors->dev_attr.attr);
951 sensors->dev_attr.attr.name = rw->label;
952 sensors->dev_attr.attr.mode = S_IRUGO | S_IWUSR;
953 sensors->dev_attr.show = rw->show;
954 sensors->dev_attr.store = rw->set;
955 sensors->index = rw->index;
957 err = device_create_file(dev, &sensors->dev_attr);
959 sensors->dev_attr.attr.name = NULL;
966 err = device_create_file(dev, &sensor_dev_attr_name.dev_attr);
969 err = device_create_file(dev, &sensor_dev_attr_version.dev_attr);
973 aem_remove_sensors(data);
977 /* sysfs support functions for AEM2 sensors */
979 /* Display temperature use */
980 static ssize_t aem2_show_temp(struct device *dev,
981 struct device_attribute *devattr,
984 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
985 struct aem_data *a = dev_get_drvdata(dev);
988 return sprintf(buf, "%u\n", a->temp[attr->index] * 1000);
991 /* Display power-capping registers */
992 static ssize_t aem2_show_pcap_value(struct device *dev,
993 struct device_attribute *devattr,
996 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
997 struct aem_data *a = dev_get_drvdata(dev);
1000 return sprintf(buf, "%u\n", a->pcap[attr->index] * 100000);
1003 /* Remove sensors attached to an AEM device */
1004 static void aem_remove_sensors(struct aem_data *data)
1008 for (i = 0; i < AEM_NUM_SENSORS; i++) {
1009 if (!data->sensors[i].dev_attr.attr.name)
1011 device_remove_file(&data->pdev->dev,
1012 &data->sensors[i].dev_attr);
1015 device_remove_file(&data->pdev->dev,
1016 &sensor_dev_attr_name.dev_attr);
1017 device_remove_file(&data->pdev->dev,
1018 &sensor_dev_attr_version.dev_attr);
1021 /* Sensor probe functions */
1023 /* Description of AEM1 sensors */
1024 static struct aem_ro_sensor_template aem1_ro_sensors[] = {
1025 {"energy1_input", aem_show_energy, 0},
1026 {"power1_average", aem_show_power, 0},
1030 static struct aem_rw_sensor_template aem1_rw_sensors[] = {
1031 {"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
1032 {NULL, NULL, NULL, 0},
1035 /* Description of AEM2 sensors */
1036 static struct aem_ro_sensor_template aem2_ro_sensors[] = {
1037 {"energy1_input", aem_show_energy, 0},
1038 {"energy2_input", aem_show_energy, 1},
1039 {"power1_average", aem_show_power, 0},
1040 {"power2_average", aem_show_power, 1},
1041 {"temp1_input", aem2_show_temp, 0},
1042 {"temp2_input", aem2_show_temp, 1},
1044 {"power4_average", aem2_show_pcap_value, POWER_CAP_MAX_HOTPLUG},
1045 {"power5_average", aem2_show_pcap_value, POWER_CAP_MAX},
1046 {"power6_average", aem2_show_pcap_value, POWER_CAP_MIN_WARNING},
1047 {"power7_average", aem2_show_pcap_value, POWER_CAP_MIN},
1049 {"power3_average", aem2_show_pcap_value, POWER_AUX},
1050 {"power_cap", aem2_show_pcap_value, POWER_CAP},
1054 static struct aem_rw_sensor_template aem2_rw_sensors[] = {
1055 {"power1_average_interval", aem_show_power_period, aem_set_power_period, 0},
1056 {"power2_average_interval", aem_show_power_period, aem_set_power_period, 1},
1057 {NULL, NULL, NULL, 0},
1060 /* Set up AEM1 sensor attrs */
1061 static int aem1_find_sensors(struct aem_data *data)
1063 return aem_register_sensors(data, aem1_ro_sensors, aem1_rw_sensors);
1066 /* Set up AEM2 sensor attrs */
1067 static int aem2_find_sensors(struct aem_data *data)
1069 return aem_register_sensors(data, aem2_ro_sensors, aem2_rw_sensors);
1072 /* Module init/exit routines */
1074 static int __init aem_init(void)
1078 res = driver_register(&aem_driver.driver);
1080 pr_err("Can't register aem driver\n");
1084 res = ipmi_smi_watcher_register(&driver_data.bmc_events);
1090 driver_unregister(&aem_driver.driver);
1095 static void __exit aem_exit(void)
1097 struct aem_data *p1, *next1;
1099 ipmi_smi_watcher_unregister(&driver_data.bmc_events);
1100 driver_unregister(&aem_driver.driver);
1101 list_for_each_entry_safe(p1, next1, &driver_data.aem_devices, list)
1105 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
1106 MODULE_DESCRIPTION("IBM AEM power/temp/energy sensor driver");
1107 MODULE_LICENSE("GPL");
1109 module_init(aem_init);
1110 module_exit(aem_exit);
1112 MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3350-*");
1113 MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3550-*");
1114 MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3650-*");
1115 MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3655-*");
1116 MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3755-*");
1117 MODULE_ALIAS("dmi:bvnIBM:*:pnIBM3850M2/x3950M2-*");
1118 MODULE_ALIAS("dmi:bvnIBM:*:pnIBMBladeHC10-*");