ACPICA: create acpica/ directory
also, delete sleep/ and delete ACPI_CFLAGS from Makefile Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Len Brown
520
drivers/acpi/proc.c
Normal file
520
drivers/acpi/proc.c
Normal file
@@ -0,0 +1,520 @@
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/suspend.h>
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#include <linux/bcd.h>
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#include <asm/uaccess.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#ifdef CONFIG_X86
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#include <linux/mc146818rtc.h>
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#endif
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#include "sleep.h"
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#define _COMPONENT ACPI_SYSTEM_COMPONENT
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/*
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* this file provides support for:
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* /proc/acpi/sleep
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* /proc/acpi/alarm
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* /proc/acpi/wakeup
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*/
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ACPI_MODULE_NAME("sleep")
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#ifdef CONFIG_ACPI_PROCFS
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static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset)
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{
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int i;
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for (i = 0; i <= ACPI_STATE_S5; i++) {
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if (sleep_states[i]) {
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seq_printf(seq, "S%d ", i);
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}
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}
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seq_puts(seq, "\n");
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return 0;
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}
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static int acpi_system_sleep_open_fs(struct inode *inode, struct file *file)
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{
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return single_open(file, acpi_system_sleep_seq_show, PDE(inode)->data);
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}
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static ssize_t
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acpi_system_write_sleep(struct file *file,
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const char __user * buffer, size_t count, loff_t * ppos)
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{
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char str[12];
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u32 state = 0;
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int error = 0;
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if (count > sizeof(str) - 1)
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goto Done;
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memset(str, 0, sizeof(str));
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if (copy_from_user(str, buffer, count))
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return -EFAULT;
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/* Check for S4 bios request */
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if (!strcmp(str, "4b")) {
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error = acpi_suspend(4);
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goto Done;
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}
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state = simple_strtoul(str, NULL, 0);
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#ifdef CONFIG_HIBERNATION
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if (state == 4) {
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error = hibernate();
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goto Done;
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}
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#endif
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error = acpi_suspend(state);
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Done:
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return error ? error : count;
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}
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#endif /* CONFIG_ACPI_PROCFS */
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#if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE) || !defined(CONFIG_X86)
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/* use /sys/class/rtc/rtcX/wakealarm instead; it's not ACPI-specific */
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#else
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#define HAVE_ACPI_LEGACY_ALARM
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#endif
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#ifdef HAVE_ACPI_LEGACY_ALARM
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static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset)
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{
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u32 sec, min, hr;
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u32 day, mo, yr, cent = 0;
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unsigned char rtc_control = 0;
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unsigned long flags;
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spin_lock_irqsave(&rtc_lock, flags);
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sec = CMOS_READ(RTC_SECONDS_ALARM);
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min = CMOS_READ(RTC_MINUTES_ALARM);
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hr = CMOS_READ(RTC_HOURS_ALARM);
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rtc_control = CMOS_READ(RTC_CONTROL);
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/* If we ever get an FACP with proper values... */
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if (acpi_gbl_FADT.day_alarm)
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/* ACPI spec: only low 6 its should be cared */
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day = CMOS_READ(acpi_gbl_FADT.day_alarm) & 0x3F;
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else
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day = CMOS_READ(RTC_DAY_OF_MONTH);
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if (acpi_gbl_FADT.month_alarm)
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mo = CMOS_READ(acpi_gbl_FADT.month_alarm);
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else
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mo = CMOS_READ(RTC_MONTH);
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if (acpi_gbl_FADT.century)
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cent = CMOS_READ(acpi_gbl_FADT.century);
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yr = CMOS_READ(RTC_YEAR);
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spin_unlock_irqrestore(&rtc_lock, flags);
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if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
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sec = bcd2bin(sec);
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min = bcd2bin(min);
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hr = bcd2bin(hr);
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day = bcd2bin(day);
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mo = bcd2bin(mo);
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yr = bcd2bin(yr);
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cent = bcd2bin(cent);
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}
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/* we're trusting the FADT (see above) */
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if (!acpi_gbl_FADT.century)
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/* If we're not trusting the FADT, we should at least make it
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* right for _this_ century... ehm, what is _this_ century?
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*
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* TBD:
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* ASAP: find piece of code in the kernel, e.g. star tracker driver,
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* which we can trust to determine the century correctly. Atom
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* watch driver would be nice, too...
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*
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* if that has not happened, change for first release in 2050:
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* if (yr<50)
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* yr += 2100;
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* else
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* yr += 2000; // current line of code
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*
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* if that has not happened either, please do on 2099/12/31:23:59:59
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* s/2000/2100
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*
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*/
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yr += 2000;
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else
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yr += cent * 100;
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seq_printf(seq, "%4.4u-", yr);
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(mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo);
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(day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day);
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(hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr);
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(min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min);
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(sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec);
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return 0;
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}
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static int acpi_system_alarm_open_fs(struct inode *inode, struct file *file)
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{
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return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data);
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}
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static int get_date_field(char **p, u32 * value)
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{
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char *next = NULL;
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char *string_end = NULL;
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int result = -EINVAL;
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/*
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* Try to find delimeter, only to insert null. The end of the
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* string won't have one, but is still valid.
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*/
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if (*p == NULL)
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return result;
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next = strpbrk(*p, "- :");
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if (next)
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*next++ = '\0';
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*value = simple_strtoul(*p, &string_end, 10);
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/* Signal success if we got a good digit */
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if (string_end != *p)
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result = 0;
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if (next)
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*p = next;
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else
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*p = NULL;
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return result;
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}
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/* Read a possibly BCD register, always return binary */
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static u32 cmos_bcd_read(int offset, int rtc_control)
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{
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u32 val = CMOS_READ(offset);
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if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
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val = bcd2bin(val);
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return val;
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}
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/* Write binary value into possibly BCD register */
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static void cmos_bcd_write(u32 val, int offset, int rtc_control)
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{
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if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
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val = bin2bcd(val);
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CMOS_WRITE(val, offset);
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}
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static ssize_t
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acpi_system_write_alarm(struct file *file,
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const char __user * buffer, size_t count, loff_t * ppos)
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{
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int result = 0;
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char alarm_string[30] = { '\0' };
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char *p = alarm_string;
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u32 sec, min, hr, day, mo, yr;
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int adjust = 0;
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unsigned char rtc_control = 0;
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if (count > sizeof(alarm_string) - 1)
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return -EINVAL;
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if (copy_from_user(alarm_string, buffer, count))
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return -EFAULT;
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alarm_string[count] = '\0';
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/* check for time adjustment */
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if (alarm_string[0] == '+') {
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p++;
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adjust = 1;
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}
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if ((result = get_date_field(&p, &yr)))
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goto end;
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if ((result = get_date_field(&p, &mo)))
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goto end;
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if ((result = get_date_field(&p, &day)))
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goto end;
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if ((result = get_date_field(&p, &hr)))
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goto end;
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if ((result = get_date_field(&p, &min)))
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goto end;
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if ((result = get_date_field(&p, &sec)))
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goto end;
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spin_lock_irq(&rtc_lock);
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rtc_control = CMOS_READ(RTC_CONTROL);
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if (adjust) {
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yr += cmos_bcd_read(RTC_YEAR, rtc_control);
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mo += cmos_bcd_read(RTC_MONTH, rtc_control);
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day += cmos_bcd_read(RTC_DAY_OF_MONTH, rtc_control);
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hr += cmos_bcd_read(RTC_HOURS, rtc_control);
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min += cmos_bcd_read(RTC_MINUTES, rtc_control);
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sec += cmos_bcd_read(RTC_SECONDS, rtc_control);
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}
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spin_unlock_irq(&rtc_lock);
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if (sec > 59) {
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min += sec/60;
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sec = sec%60;
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}
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if (min > 59) {
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hr += min/60;
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min = min%60;
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}
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if (hr > 23) {
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day += hr/24;
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hr = hr%24;
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}
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if (day > 31) {
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mo += day/32;
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day = day%32;
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}
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if (mo > 12) {
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yr += mo/13;
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mo = mo%13;
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}
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spin_lock_irq(&rtc_lock);
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/*
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* Disable alarm interrupt before setting alarm timer or else
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* when ACPI_EVENT_RTC is enabled, a spurious ACPI interrupt occurs
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*/
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rtc_control &= ~RTC_AIE;
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CMOS_WRITE(rtc_control, RTC_CONTROL);
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CMOS_READ(RTC_INTR_FLAGS);
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/* write the fields the rtc knows about */
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cmos_bcd_write(hr, RTC_HOURS_ALARM, rtc_control);
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cmos_bcd_write(min, RTC_MINUTES_ALARM, rtc_control);
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cmos_bcd_write(sec, RTC_SECONDS_ALARM, rtc_control);
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/*
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* If the system supports an enhanced alarm it will have non-zero
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* offsets into the CMOS RAM here -- which for some reason are pointing
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* to the RTC area of memory.
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*/
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if (acpi_gbl_FADT.day_alarm)
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cmos_bcd_write(day, acpi_gbl_FADT.day_alarm, rtc_control);
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if (acpi_gbl_FADT.month_alarm)
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cmos_bcd_write(mo, acpi_gbl_FADT.month_alarm, rtc_control);
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if (acpi_gbl_FADT.century) {
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if (adjust)
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yr += cmos_bcd_read(acpi_gbl_FADT.century, rtc_control) * 100;
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cmos_bcd_write(yr / 100, acpi_gbl_FADT.century, rtc_control);
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}
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/* enable the rtc alarm interrupt */
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rtc_control |= RTC_AIE;
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CMOS_WRITE(rtc_control, RTC_CONTROL);
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CMOS_READ(RTC_INTR_FLAGS);
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spin_unlock_irq(&rtc_lock);
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acpi_clear_event(ACPI_EVENT_RTC);
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acpi_enable_event(ACPI_EVENT_RTC, 0);
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*ppos += count;
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result = 0;
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end:
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return result ? result : count;
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}
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#endif /* HAVE_ACPI_LEGACY_ALARM */
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extern struct list_head acpi_wakeup_device_list;
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extern spinlock_t acpi_device_lock;
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static int
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acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
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{
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struct list_head *node, *next;
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seq_printf(seq, "Device\tS-state\t Status Sysfs node\n");
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spin_lock(&acpi_device_lock);
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list_for_each_safe(node, next, &acpi_wakeup_device_list) {
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struct acpi_device *dev =
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container_of(node, struct acpi_device, wakeup_list);
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struct device *ldev;
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if (!dev->wakeup.flags.valid)
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continue;
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spin_unlock(&acpi_device_lock);
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ldev = acpi_get_physical_device(dev->handle);
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seq_printf(seq, "%s\t S%d\t%c%-8s ",
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dev->pnp.bus_id,
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(u32) dev->wakeup.sleep_state,
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dev->wakeup.flags.run_wake ? '*' : ' ',
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dev->wakeup.state.enabled ? "enabled" : "disabled");
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if (ldev)
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seq_printf(seq, "%s:%s",
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ldev->bus ? ldev->bus->name : "no-bus",
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dev_name(ldev));
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seq_printf(seq, "\n");
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put_device(ldev);
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spin_lock(&acpi_device_lock);
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}
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spin_unlock(&acpi_device_lock);
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return 0;
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}
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static void physical_device_enable_wakeup(struct acpi_device *adev)
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{
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struct device *dev = acpi_get_physical_device(adev->handle);
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if (dev && device_can_wakeup(dev))
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device_set_wakeup_enable(dev, adev->wakeup.state.enabled);
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}
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static ssize_t
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acpi_system_write_wakeup_device(struct file *file,
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const char __user * buffer,
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size_t count, loff_t * ppos)
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{
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struct list_head *node, *next;
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char strbuf[5];
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char str[5] = "";
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int len = count;
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struct acpi_device *found_dev = NULL;
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if (len > 4)
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len = 4;
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if (copy_from_user(strbuf, buffer, len))
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return -EFAULT;
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strbuf[len] = '\0';
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sscanf(strbuf, "%s", str);
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spin_lock(&acpi_device_lock);
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list_for_each_safe(node, next, &acpi_wakeup_device_list) {
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struct acpi_device *dev =
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container_of(node, struct acpi_device, wakeup_list);
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if (!dev->wakeup.flags.valid)
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continue;
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if (!strncmp(dev->pnp.bus_id, str, 4)) {
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dev->wakeup.state.enabled =
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dev->wakeup.state.enabled ? 0 : 1;
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found_dev = dev;
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break;
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}
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}
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if (found_dev) {
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physical_device_enable_wakeup(found_dev);
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list_for_each_safe(node, next, &acpi_wakeup_device_list) {
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struct acpi_device *dev = container_of(node,
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struct
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acpi_device,
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wakeup_list);
|
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if ((dev != found_dev) &&
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(dev->wakeup.gpe_number ==
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found_dev->wakeup.gpe_number)
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&& (dev->wakeup.gpe_device ==
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found_dev->wakeup.gpe_device)) {
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printk(KERN_WARNING
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"ACPI: '%s' and '%s' have the same GPE, "
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"can't disable/enable one seperately\n",
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dev->pnp.bus_id, found_dev->pnp.bus_id);
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dev->wakeup.state.enabled =
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found_dev->wakeup.state.enabled;
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physical_device_enable_wakeup(dev);
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}
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}
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}
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spin_unlock(&acpi_device_lock);
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return count;
|
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}
|
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|
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static int
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acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file)
|
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{
|
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return single_open(file, acpi_system_wakeup_device_seq_show,
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PDE(inode)->data);
|
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}
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static const struct file_operations acpi_system_wakeup_device_fops = {
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.owner = THIS_MODULE,
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.open = acpi_system_wakeup_device_open_fs,
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.read = seq_read,
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.write = acpi_system_write_wakeup_device,
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.llseek = seq_lseek,
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.release = single_release,
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};
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#ifdef CONFIG_ACPI_PROCFS
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static const struct file_operations acpi_system_sleep_fops = {
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.owner = THIS_MODULE,
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.open = acpi_system_sleep_open_fs,
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.read = seq_read,
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.write = acpi_system_write_sleep,
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.llseek = seq_lseek,
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.release = single_release,
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};
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#endif /* CONFIG_ACPI_PROCFS */
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#ifdef HAVE_ACPI_LEGACY_ALARM
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static const struct file_operations acpi_system_alarm_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = acpi_system_alarm_open_fs,
|
||||
.read = seq_read,
|
||||
.write = acpi_system_write_alarm,
|
||||
.llseek = seq_lseek,
|
||||
.release = single_release,
|
||||
};
|
||||
|
||||
static u32 rtc_handler(void *context)
|
||||
{
|
||||
acpi_clear_event(ACPI_EVENT_RTC);
|
||||
acpi_disable_event(ACPI_EVENT_RTC, 0);
|
||||
|
||||
return ACPI_INTERRUPT_HANDLED;
|
||||
}
|
||||
#endif /* HAVE_ACPI_LEGACY_ALARM */
|
||||
|
||||
static int __init acpi_sleep_proc_init(void)
|
||||
{
|
||||
if (acpi_disabled)
|
||||
return 0;
|
||||
|
||||
#ifdef CONFIG_ACPI_PROCFS
|
||||
/* 'sleep' [R/W] */
|
||||
proc_create("sleep", S_IFREG | S_IRUGO | S_IWUSR,
|
||||
acpi_root_dir, &acpi_system_sleep_fops);
|
||||
#endif /* CONFIG_ACPI_PROCFS */
|
||||
|
||||
#ifdef HAVE_ACPI_LEGACY_ALARM
|
||||
/* 'alarm' [R/W] */
|
||||
proc_create("alarm", S_IFREG | S_IRUGO | S_IWUSR,
|
||||
acpi_root_dir, &acpi_system_alarm_fops);
|
||||
|
||||
acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
|
||||
/*
|
||||
* Disable the RTC event after installing RTC handler.
|
||||
* Only when RTC alarm is set will it be enabled.
|
||||
*/
|
||||
acpi_clear_event(ACPI_EVENT_RTC);
|
||||
acpi_disable_event(ACPI_EVENT_RTC, 0);
|
||||
#endif /* HAVE_ACPI_LEGACY_ALARM */
|
||||
|
||||
/* 'wakeup device' [R/W] */
|
||||
proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR,
|
||||
acpi_root_dir, &acpi_system_wakeup_device_fops);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
late_initcall(acpi_sleep_proc_init);
|
||||
Reference in New Issue
Block a user