![Pavel Machek](/assets/img/avatar_default.png)
Remove S4BIOS support. It is pretty useless, and only ever worked for _me_ once. (I do not think anyone else ever tried it). It was in feature-removal for a long time, and it should have been removed before. Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: "Brown, Len" <len.brown@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
506 lines
12 KiB
C
506 lines
12 KiB
C
#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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ACPI_MODULE_NAME("sleep")
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#ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP
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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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ACPI_FUNCTION_TRACE("acpi_system_sleep_seq_show");
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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_SOFTWARE_SUSPEND
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if (state == 4) {
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error = software_suspend();
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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_SLEEP_PROC_SLEEP */
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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;
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unsigned char rtc_control = 0;
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unsigned long flags;
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ACPI_FUNCTION_TRACE("acpi_system_alarm_seq_show");
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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_alrm)
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/* ACPI spec: only low 6 its should be cared */
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day = CMOS_READ(acpi_gbl_FADT->day_alrm) & 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->mon_alrm)
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mo = CMOS_READ(acpi_gbl_FADT->mon_alrm);
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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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yr = CMOS_READ(acpi_gbl_FADT->century) * 100 +
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CMOS_READ(RTC_YEAR);
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else
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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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BCD_TO_BIN(sec);
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BCD_TO_BIN(min);
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BCD_TO_BIN(hr);
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BCD_TO_BIN(day);
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BCD_TO_BIN(mo);
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BCD_TO_BIN(yr);
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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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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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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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return result;
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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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ACPI_FUNCTION_TRACE("acpi_system_write_alarm");
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if (count > sizeof(alarm_string) - 1)
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return_VALUE(-EINVAL);
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if (copy_from_user(alarm_string, buffer, count))
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return_VALUE(-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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if (sec > 59) {
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min += 1;
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sec -= 60;
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}
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if (min > 59) {
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hr += 1;
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min -= 60;
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}
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if (hr > 23) {
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day += 1;
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hr -= 24;
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}
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if (day > 31) {
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mo += 1;
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day -= 31;
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}
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if (mo > 12) {
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yr += 1;
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mo -= 12;
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}
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spin_lock_irq(&rtc_lock);
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rtc_control = CMOS_READ(RTC_CONTROL);
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if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
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BIN_TO_BCD(yr);
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BIN_TO_BCD(mo);
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BIN_TO_BCD(day);
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BIN_TO_BCD(hr);
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BIN_TO_BCD(min);
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BIN_TO_BCD(sec);
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}
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if (adjust) {
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yr += CMOS_READ(RTC_YEAR);
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mo += CMOS_READ(RTC_MONTH);
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day += CMOS_READ(RTC_DAY_OF_MONTH);
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hr += CMOS_READ(RTC_HOURS);
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min += CMOS_READ(RTC_MINUTES);
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sec += CMOS_READ(RTC_SECONDS);
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}
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spin_unlock_irq(&rtc_lock);
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if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
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BCD_TO_BIN(yr);
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BCD_TO_BIN(mo);
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BCD_TO_BIN(day);
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BCD_TO_BIN(hr);
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BCD_TO_BIN(min);
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BCD_TO_BIN(sec);
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}
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if (sec > 59) {
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min++;
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sec -= 60;
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}
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if (min > 59) {
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hr++;
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min -= 60;
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}
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if (hr > 23) {
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day++;
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hr -= 24;
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}
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if (day > 31) {
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mo++;
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day -= 31;
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}
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if (mo > 12) {
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yr++;
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mo -= 12;
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}
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if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
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BIN_TO_BCD(yr);
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BIN_TO_BCD(mo);
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BIN_TO_BCD(day);
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BIN_TO_BCD(hr);
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BIN_TO_BCD(min);
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BIN_TO_BCD(sec);
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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_WRITE(hr, RTC_HOURS_ALARM);
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CMOS_WRITE(min, RTC_MINUTES_ALARM);
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CMOS_WRITE(sec, RTC_SECONDS_ALARM);
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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_alrm)
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CMOS_WRITE(day, acpi_gbl_FADT->day_alrm);
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if (acpi_gbl_FADT->mon_alrm)
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CMOS_WRITE(mo, acpi_gbl_FADT->mon_alrm);
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if (acpi_gbl_FADT->century)
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CMOS_WRITE(yr / 100, acpi_gbl_FADT->century);
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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_VALUE(result ? result : count);
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}
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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 Sleep state Status\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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if (!dev->wakeup.flags.valid)
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continue;
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spin_unlock(&acpi_device_lock);
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seq_printf(seq, "%4s %4d %s%8s\n",
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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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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 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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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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}
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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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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 struct file_operations acpi_system_wakeup_device_fops = {
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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_SLEEP_PROC_SLEEP
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static struct file_operations acpi_system_sleep_fops = {
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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_SLEEP_PROC_SLEEP */
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static struct file_operations acpi_system_alarm_fops = {
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.open = acpi_system_alarm_open_fs,
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.read = seq_read,
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.write = acpi_system_write_alarm,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static u32 rtc_handler(void *context)
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{
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acpi_clear_event(ACPI_EVENT_RTC);
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acpi_disable_event(ACPI_EVENT_RTC, 0);
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return ACPI_INTERRUPT_HANDLED;
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}
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static int acpi_sleep_proc_init(void)
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{
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struct proc_dir_entry *entry = NULL;
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if (acpi_disabled)
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return 0;
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#ifdef CONFIG_ACPI_SLEEP_PROC_SLEEP
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/* 'sleep' [R/W] */
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entry =
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create_proc_entry("sleep", S_IFREG | S_IRUGO | S_IWUSR,
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acpi_root_dir);
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if (entry)
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entry->proc_fops = &acpi_system_sleep_fops;
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#endif
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/* 'alarm' [R/W] */
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entry =
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create_proc_entry("alarm", S_IFREG | S_IRUGO | S_IWUSR,
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acpi_root_dir);
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if (entry)
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entry->proc_fops = &acpi_system_alarm_fops;
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/* 'wakeup device' [R/W] */
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entry =
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create_proc_entry("wakeup", S_IFREG | S_IRUGO | S_IWUSR,
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acpi_root_dir);
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if (entry)
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entry->proc_fops = &acpi_system_wakeup_device_fops;
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acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
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return 0;
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}
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late_initcall(acpi_sleep_proc_init);
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