mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 11:49:32 +00:00
![Wolfram Sang](/assets/img/avatar_default.png)
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
649 lines
16 KiB
C
649 lines
16 KiB
C
/*
|
|
* dcdbas.c: Dell Systems Management Base Driver
|
|
*
|
|
* The Dell Systems Management Base Driver provides a sysfs interface for
|
|
* systems management software to perform System Management Interrupts (SMIs)
|
|
* and Host Control Actions (power cycle or power off after OS shutdown) on
|
|
* Dell systems.
|
|
*
|
|
* See Documentation/dcdbas.txt for more information.
|
|
*
|
|
* Copyright (C) 1995-2006 Dell Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License v2.0 as published by
|
|
* the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/gfp.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mc146818rtc.h>
|
|
#include <linux/module.h>
|
|
#include <linux/reboot.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/string.h>
|
|
#include <linux/types.h>
|
|
#include <linux/mutex.h>
|
|
#include <asm/io.h>
|
|
|
|
#include "dcdbas.h"
|
|
|
|
#define DRIVER_NAME "dcdbas"
|
|
#define DRIVER_VERSION "5.6.0-3.2"
|
|
#define DRIVER_DESCRIPTION "Dell Systems Management Base Driver"
|
|
|
|
static struct platform_device *dcdbas_pdev;
|
|
|
|
static u8 *smi_data_buf;
|
|
static dma_addr_t smi_data_buf_handle;
|
|
static unsigned long smi_data_buf_size;
|
|
static u32 smi_data_buf_phys_addr;
|
|
static DEFINE_MUTEX(smi_data_lock);
|
|
|
|
static unsigned int host_control_action;
|
|
static unsigned int host_control_smi_type;
|
|
static unsigned int host_control_on_shutdown;
|
|
|
|
/**
|
|
* smi_data_buf_free: free SMI data buffer
|
|
*/
|
|
static void smi_data_buf_free(void)
|
|
{
|
|
if (!smi_data_buf)
|
|
return;
|
|
|
|
dev_dbg(&dcdbas_pdev->dev, "%s: phys: %x size: %lu\n",
|
|
__func__, smi_data_buf_phys_addr, smi_data_buf_size);
|
|
|
|
dma_free_coherent(&dcdbas_pdev->dev, smi_data_buf_size, smi_data_buf,
|
|
smi_data_buf_handle);
|
|
smi_data_buf = NULL;
|
|
smi_data_buf_handle = 0;
|
|
smi_data_buf_phys_addr = 0;
|
|
smi_data_buf_size = 0;
|
|
}
|
|
|
|
/**
|
|
* smi_data_buf_realloc: grow SMI data buffer if needed
|
|
*/
|
|
static int smi_data_buf_realloc(unsigned long size)
|
|
{
|
|
void *buf;
|
|
dma_addr_t handle;
|
|
|
|
if (smi_data_buf_size >= size)
|
|
return 0;
|
|
|
|
if (size > MAX_SMI_DATA_BUF_SIZE)
|
|
return -EINVAL;
|
|
|
|
/* new buffer is needed */
|
|
buf = dma_alloc_coherent(&dcdbas_pdev->dev, size, &handle, GFP_KERNEL);
|
|
if (!buf) {
|
|
dev_dbg(&dcdbas_pdev->dev,
|
|
"%s: failed to allocate memory size %lu\n",
|
|
__func__, size);
|
|
return -ENOMEM;
|
|
}
|
|
/* memory zeroed by dma_alloc_coherent */
|
|
|
|
if (smi_data_buf)
|
|
memcpy(buf, smi_data_buf, smi_data_buf_size);
|
|
|
|
/* free any existing buffer */
|
|
smi_data_buf_free();
|
|
|
|
/* set up new buffer for use */
|
|
smi_data_buf = buf;
|
|
smi_data_buf_handle = handle;
|
|
smi_data_buf_phys_addr = (u32) virt_to_phys(buf);
|
|
smi_data_buf_size = size;
|
|
|
|
dev_dbg(&dcdbas_pdev->dev, "%s: phys: %x size: %lu\n",
|
|
__func__, smi_data_buf_phys_addr, smi_data_buf_size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t smi_data_buf_phys_addr_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%x\n", smi_data_buf_phys_addr);
|
|
}
|
|
|
|
static ssize_t smi_data_buf_size_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%lu\n", smi_data_buf_size);
|
|
}
|
|
|
|
static ssize_t smi_data_buf_size_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
unsigned long buf_size;
|
|
ssize_t ret;
|
|
|
|
buf_size = simple_strtoul(buf, NULL, 10);
|
|
|
|
/* make sure SMI data buffer is at least buf_size */
|
|
mutex_lock(&smi_data_lock);
|
|
ret = smi_data_buf_realloc(buf_size);
|
|
mutex_unlock(&smi_data_lock);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t smi_data_read(struct file *filp, struct kobject *kobj,
|
|
struct bin_attribute *bin_attr,
|
|
char *buf, loff_t pos, size_t count)
|
|
{
|
|
ssize_t ret;
|
|
|
|
mutex_lock(&smi_data_lock);
|
|
ret = memory_read_from_buffer(buf, count, &pos, smi_data_buf,
|
|
smi_data_buf_size);
|
|
mutex_unlock(&smi_data_lock);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t smi_data_write(struct file *filp, struct kobject *kobj,
|
|
struct bin_attribute *bin_attr,
|
|
char *buf, loff_t pos, size_t count)
|
|
{
|
|
ssize_t ret;
|
|
|
|
if ((pos + count) > MAX_SMI_DATA_BUF_SIZE)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&smi_data_lock);
|
|
|
|
ret = smi_data_buf_realloc(pos + count);
|
|
if (ret)
|
|
goto out;
|
|
|
|
memcpy(smi_data_buf + pos, buf, count);
|
|
ret = count;
|
|
out:
|
|
mutex_unlock(&smi_data_lock);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t host_control_action_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%u\n", host_control_action);
|
|
}
|
|
|
|
static ssize_t host_control_action_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
ssize_t ret;
|
|
|
|
/* make sure buffer is available for host control command */
|
|
mutex_lock(&smi_data_lock);
|
|
ret = smi_data_buf_realloc(sizeof(struct apm_cmd));
|
|
mutex_unlock(&smi_data_lock);
|
|
if (ret)
|
|
return ret;
|
|
|
|
host_control_action = simple_strtoul(buf, NULL, 10);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t host_control_smi_type_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%u\n", host_control_smi_type);
|
|
}
|
|
|
|
static ssize_t host_control_smi_type_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
host_control_smi_type = simple_strtoul(buf, NULL, 10);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t host_control_on_shutdown_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%u\n", host_control_on_shutdown);
|
|
}
|
|
|
|
static ssize_t host_control_on_shutdown_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
host_control_on_shutdown = simple_strtoul(buf, NULL, 10);
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* dcdbas_smi_request: generate SMI request
|
|
*
|
|
* Called with smi_data_lock.
|
|
*/
|
|
int dcdbas_smi_request(struct smi_cmd *smi_cmd)
|
|
{
|
|
cpumask_var_t old_mask;
|
|
int ret = 0;
|
|
|
|
if (smi_cmd->magic != SMI_CMD_MAGIC) {
|
|
dev_info(&dcdbas_pdev->dev, "%s: invalid magic value\n",
|
|
__func__);
|
|
return -EBADR;
|
|
}
|
|
|
|
/* SMI requires CPU 0 */
|
|
if (!alloc_cpumask_var(&old_mask, GFP_KERNEL))
|
|
return -ENOMEM;
|
|
|
|
cpumask_copy(old_mask, ¤t->cpus_allowed);
|
|
set_cpus_allowed_ptr(current, cpumask_of(0));
|
|
if (smp_processor_id() != 0) {
|
|
dev_dbg(&dcdbas_pdev->dev, "%s: failed to get CPU 0\n",
|
|
__func__);
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* generate SMI */
|
|
/* inb to force posted write through and make SMI happen now */
|
|
asm volatile (
|
|
"outb %b0,%w1\n"
|
|
"inb %w1"
|
|
: /* no output args */
|
|
: "a" (smi_cmd->command_code),
|
|
"d" (smi_cmd->command_address),
|
|
"b" (smi_cmd->ebx),
|
|
"c" (smi_cmd->ecx)
|
|
: "memory"
|
|
);
|
|
|
|
out:
|
|
set_cpus_allowed_ptr(current, old_mask);
|
|
free_cpumask_var(old_mask);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* smi_request_store:
|
|
*
|
|
* The valid values are:
|
|
* 0: zero SMI data buffer
|
|
* 1: generate calling interface SMI
|
|
* 2: generate raw SMI
|
|
*
|
|
* User application writes smi_cmd to smi_data before telling driver
|
|
* to generate SMI.
|
|
*/
|
|
static ssize_t smi_request_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct smi_cmd *smi_cmd;
|
|
unsigned long val = simple_strtoul(buf, NULL, 10);
|
|
ssize_t ret;
|
|
|
|
mutex_lock(&smi_data_lock);
|
|
|
|
if (smi_data_buf_size < sizeof(struct smi_cmd)) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
smi_cmd = (struct smi_cmd *)smi_data_buf;
|
|
|
|
switch (val) {
|
|
case 2:
|
|
/* Raw SMI */
|
|
ret = dcdbas_smi_request(smi_cmd);
|
|
if (!ret)
|
|
ret = count;
|
|
break;
|
|
case 1:
|
|
/* Calling Interface SMI */
|
|
smi_cmd->ebx = (u32) virt_to_phys(smi_cmd->command_buffer);
|
|
ret = dcdbas_smi_request(smi_cmd);
|
|
if (!ret)
|
|
ret = count;
|
|
break;
|
|
case 0:
|
|
memset(smi_data_buf, 0, smi_data_buf_size);
|
|
ret = count;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&smi_data_lock);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(dcdbas_smi_request);
|
|
|
|
/**
|
|
* host_control_smi: generate host control SMI
|
|
*
|
|
* Caller must set up the host control command in smi_data_buf.
|
|
*/
|
|
static int host_control_smi(void)
|
|
{
|
|
struct apm_cmd *apm_cmd;
|
|
u8 *data;
|
|
unsigned long flags;
|
|
u32 num_ticks;
|
|
s8 cmd_status;
|
|
u8 index;
|
|
|
|
apm_cmd = (struct apm_cmd *)smi_data_buf;
|
|
apm_cmd->status = ESM_STATUS_CMD_UNSUCCESSFUL;
|
|
|
|
switch (host_control_smi_type) {
|
|
case HC_SMITYPE_TYPE1:
|
|
spin_lock_irqsave(&rtc_lock, flags);
|
|
/* write SMI data buffer physical address */
|
|
data = (u8 *)&smi_data_buf_phys_addr;
|
|
for (index = PE1300_CMOS_CMD_STRUCT_PTR;
|
|
index < (PE1300_CMOS_CMD_STRUCT_PTR + 4);
|
|
index++, data++) {
|
|
outb(index,
|
|
(CMOS_BASE_PORT + CMOS_PAGE2_INDEX_PORT_PIIX4));
|
|
outb(*data,
|
|
(CMOS_BASE_PORT + CMOS_PAGE2_DATA_PORT_PIIX4));
|
|
}
|
|
|
|
/* first set status to -1 as called by spec */
|
|
cmd_status = ESM_STATUS_CMD_UNSUCCESSFUL;
|
|
outb((u8) cmd_status, PCAT_APM_STATUS_PORT);
|
|
|
|
/* generate SMM call */
|
|
outb(ESM_APM_CMD, PCAT_APM_CONTROL_PORT);
|
|
spin_unlock_irqrestore(&rtc_lock, flags);
|
|
|
|
/* wait a few to see if it executed */
|
|
num_ticks = TIMEOUT_USEC_SHORT_SEMA_BLOCKING;
|
|
while ((cmd_status = inb(PCAT_APM_STATUS_PORT))
|
|
== ESM_STATUS_CMD_UNSUCCESSFUL) {
|
|
num_ticks--;
|
|
if (num_ticks == EXPIRED_TIMER)
|
|
return -ETIME;
|
|
}
|
|
break;
|
|
|
|
case HC_SMITYPE_TYPE2:
|
|
case HC_SMITYPE_TYPE3:
|
|
spin_lock_irqsave(&rtc_lock, flags);
|
|
/* write SMI data buffer physical address */
|
|
data = (u8 *)&smi_data_buf_phys_addr;
|
|
for (index = PE1400_CMOS_CMD_STRUCT_PTR;
|
|
index < (PE1400_CMOS_CMD_STRUCT_PTR + 4);
|
|
index++, data++) {
|
|
outb(index, (CMOS_BASE_PORT + CMOS_PAGE1_INDEX_PORT));
|
|
outb(*data, (CMOS_BASE_PORT + CMOS_PAGE1_DATA_PORT));
|
|
}
|
|
|
|
/* generate SMM call */
|
|
if (host_control_smi_type == HC_SMITYPE_TYPE3)
|
|
outb(ESM_APM_CMD, PCAT_APM_CONTROL_PORT);
|
|
else
|
|
outb(ESM_APM_CMD, PE1400_APM_CONTROL_PORT);
|
|
|
|
/* restore RTC index pointer since it was written to above */
|
|
CMOS_READ(RTC_REG_C);
|
|
spin_unlock_irqrestore(&rtc_lock, flags);
|
|
|
|
/* read control port back to serialize write */
|
|
cmd_status = inb(PE1400_APM_CONTROL_PORT);
|
|
|
|
/* wait a few to see if it executed */
|
|
num_ticks = TIMEOUT_USEC_SHORT_SEMA_BLOCKING;
|
|
while (apm_cmd->status == ESM_STATUS_CMD_UNSUCCESSFUL) {
|
|
num_ticks--;
|
|
if (num_ticks == EXPIRED_TIMER)
|
|
return -ETIME;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
dev_dbg(&dcdbas_pdev->dev, "%s: invalid SMI type %u\n",
|
|
__func__, host_control_smi_type);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* dcdbas_host_control: initiate host control
|
|
*
|
|
* This function is called by the driver after the system has
|
|
* finished shutting down if the user application specified a
|
|
* host control action to perform on shutdown. It is safe to
|
|
* use smi_data_buf at this point because the system has finished
|
|
* shutting down and no userspace apps are running.
|
|
*/
|
|
static void dcdbas_host_control(void)
|
|
{
|
|
struct apm_cmd *apm_cmd;
|
|
u8 action;
|
|
|
|
if (host_control_action == HC_ACTION_NONE)
|
|
return;
|
|
|
|
action = host_control_action;
|
|
host_control_action = HC_ACTION_NONE;
|
|
|
|
if (!smi_data_buf) {
|
|
dev_dbg(&dcdbas_pdev->dev, "%s: no SMI buffer\n", __func__);
|
|
return;
|
|
}
|
|
|
|
if (smi_data_buf_size < sizeof(struct apm_cmd)) {
|
|
dev_dbg(&dcdbas_pdev->dev, "%s: SMI buffer too small\n",
|
|
__func__);
|
|
return;
|
|
}
|
|
|
|
apm_cmd = (struct apm_cmd *)smi_data_buf;
|
|
|
|
/* power off takes precedence */
|
|
if (action & HC_ACTION_HOST_CONTROL_POWEROFF) {
|
|
apm_cmd->command = ESM_APM_POWER_CYCLE;
|
|
apm_cmd->reserved = 0;
|
|
*((s16 *)&apm_cmd->parameters.shortreq.parm[0]) = (s16) 0;
|
|
host_control_smi();
|
|
} else if (action & HC_ACTION_HOST_CONTROL_POWERCYCLE) {
|
|
apm_cmd->command = ESM_APM_POWER_CYCLE;
|
|
apm_cmd->reserved = 0;
|
|
*((s16 *)&apm_cmd->parameters.shortreq.parm[0]) = (s16) 20;
|
|
host_control_smi();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* dcdbas_reboot_notify: handle reboot notification for host control
|
|
*/
|
|
static int dcdbas_reboot_notify(struct notifier_block *nb, unsigned long code,
|
|
void *unused)
|
|
{
|
|
switch (code) {
|
|
case SYS_DOWN:
|
|
case SYS_HALT:
|
|
case SYS_POWER_OFF:
|
|
if (host_control_on_shutdown) {
|
|
/* firmware is going to perform host control action */
|
|
printk(KERN_WARNING "Please wait for shutdown "
|
|
"action to complete...\n");
|
|
dcdbas_host_control();
|
|
}
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block dcdbas_reboot_nb = {
|
|
.notifier_call = dcdbas_reboot_notify,
|
|
.next = NULL,
|
|
.priority = INT_MIN
|
|
};
|
|
|
|
static DCDBAS_BIN_ATTR_RW(smi_data);
|
|
|
|
static struct bin_attribute *dcdbas_bin_attrs[] = {
|
|
&bin_attr_smi_data,
|
|
NULL
|
|
};
|
|
|
|
static DCDBAS_DEV_ATTR_RW(smi_data_buf_size);
|
|
static DCDBAS_DEV_ATTR_RO(smi_data_buf_phys_addr);
|
|
static DCDBAS_DEV_ATTR_WO(smi_request);
|
|
static DCDBAS_DEV_ATTR_RW(host_control_action);
|
|
static DCDBAS_DEV_ATTR_RW(host_control_smi_type);
|
|
static DCDBAS_DEV_ATTR_RW(host_control_on_shutdown);
|
|
|
|
static struct attribute *dcdbas_dev_attrs[] = {
|
|
&dev_attr_smi_data_buf_size.attr,
|
|
&dev_attr_smi_data_buf_phys_addr.attr,
|
|
&dev_attr_smi_request.attr,
|
|
&dev_attr_host_control_action.attr,
|
|
&dev_attr_host_control_smi_type.attr,
|
|
&dev_attr_host_control_on_shutdown.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group dcdbas_attr_group = {
|
|
.attrs = dcdbas_dev_attrs,
|
|
.bin_attrs = dcdbas_bin_attrs,
|
|
};
|
|
|
|
static int dcdbas_probe(struct platform_device *dev)
|
|
{
|
|
int error;
|
|
|
|
host_control_action = HC_ACTION_NONE;
|
|
host_control_smi_type = HC_SMITYPE_NONE;
|
|
|
|
dcdbas_pdev = dev;
|
|
|
|
/*
|
|
* BIOS SMI calls require buffer addresses be in 32-bit address space.
|
|
* This is done by setting the DMA mask below.
|
|
*/
|
|
error = dma_set_coherent_mask(&dcdbas_pdev->dev, DMA_BIT_MASK(32));
|
|
if (error)
|
|
return error;
|
|
|
|
error = sysfs_create_group(&dev->dev.kobj, &dcdbas_attr_group);
|
|
if (error)
|
|
return error;
|
|
|
|
register_reboot_notifier(&dcdbas_reboot_nb);
|
|
|
|
dev_info(&dev->dev, "%s (version %s)\n",
|
|
DRIVER_DESCRIPTION, DRIVER_VERSION);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dcdbas_remove(struct platform_device *dev)
|
|
{
|
|
unregister_reboot_notifier(&dcdbas_reboot_nb);
|
|
sysfs_remove_group(&dev->dev.kobj, &dcdbas_attr_group);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver dcdbas_driver = {
|
|
.driver = {
|
|
.name = DRIVER_NAME,
|
|
},
|
|
.probe = dcdbas_probe,
|
|
.remove = dcdbas_remove,
|
|
};
|
|
|
|
static const struct platform_device_info dcdbas_dev_info __initconst = {
|
|
.name = DRIVER_NAME,
|
|
.id = -1,
|
|
.dma_mask = DMA_BIT_MASK(32),
|
|
};
|
|
|
|
static struct platform_device *dcdbas_pdev_reg;
|
|
|
|
/**
|
|
* dcdbas_init: initialize driver
|
|
*/
|
|
static int __init dcdbas_init(void)
|
|
{
|
|
int error;
|
|
|
|
error = platform_driver_register(&dcdbas_driver);
|
|
if (error)
|
|
return error;
|
|
|
|
dcdbas_pdev_reg = platform_device_register_full(&dcdbas_dev_info);
|
|
if (IS_ERR(dcdbas_pdev_reg)) {
|
|
error = PTR_ERR(dcdbas_pdev_reg);
|
|
goto err_unregister_driver;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_unregister_driver:
|
|
platform_driver_unregister(&dcdbas_driver);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* dcdbas_exit: perform driver cleanup
|
|
*/
|
|
static void __exit dcdbas_exit(void)
|
|
{
|
|
/*
|
|
* make sure functions that use dcdbas_pdev are called
|
|
* before platform_device_unregister
|
|
*/
|
|
unregister_reboot_notifier(&dcdbas_reboot_nb);
|
|
|
|
/*
|
|
* We have to free the buffer here instead of dcdbas_remove
|
|
* because only in module exit function we can be sure that
|
|
* all sysfs attributes belonging to this module have been
|
|
* released.
|
|
*/
|
|
if (dcdbas_pdev)
|
|
smi_data_buf_free();
|
|
platform_device_unregister(dcdbas_pdev_reg);
|
|
platform_driver_unregister(&dcdbas_driver);
|
|
}
|
|
|
|
module_init(dcdbas_init);
|
|
module_exit(dcdbas_exit);
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESCRIPTION " (version " DRIVER_VERSION ")");
|
|
MODULE_VERSION(DRIVER_VERSION);
|
|
MODULE_AUTHOR("Dell Inc.");
|
|
MODULE_LICENSE("GPL");
|
|
/* Any System or BIOS claiming to be by Dell */
|
|
MODULE_ALIAS("dmi:*:[bs]vnD[Ee][Ll][Ll]*:*");
|