[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/acpi/proc.c b/ap/os/linux/linux-3.4.x/drivers/acpi/proc.c
new file mode 100644
index 0000000..251c7b6
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/acpi/proc.c
@@ -0,0 +1,437 @@
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/export.h>
+#include <linux/suspend.h>
+#include <linux/bcd.h>
+#include <asm/uaccess.h>
+
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+#ifdef CONFIG_X86
+#include <linux/mc146818rtc.h>
+#endif
+
+#include "sleep.h"
+
+#define _COMPONENT ACPI_SYSTEM_COMPONENT
+
+/*
+ * this file provides support for:
+ * /proc/acpi/alarm
+ * /proc/acpi/wakeup
+ */
+
+ACPI_MODULE_NAME("sleep")
+
+#if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE) || !defined(CONFIG_X86)
+/* use /sys/class/rtc/rtcX/wakealarm instead; it's not ACPI-specific */
+#else
+#define HAVE_ACPI_LEGACY_ALARM
+#endif
+
+#ifdef HAVE_ACPI_LEGACY_ALARM
+
+static u32 cmos_bcd_read(int offset, int rtc_control);
+
+static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset)
+{
+ u32 sec, min, hr;
+ u32 day, mo, yr, cent = 0;
+ u32 today = 0;
+ unsigned char rtc_control = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&rtc_lock, flags);
+
+ rtc_control = CMOS_READ(RTC_CONTROL);
+ sec = cmos_bcd_read(RTC_SECONDS_ALARM, rtc_control);
+ min = cmos_bcd_read(RTC_MINUTES_ALARM, rtc_control);
+ hr = cmos_bcd_read(RTC_HOURS_ALARM, rtc_control);
+
+ /* If we ever get an FACP with proper values... */
+ if (acpi_gbl_FADT.day_alarm) {
+ /* ACPI spec: only low 6 its should be cared */
+ day = CMOS_READ(acpi_gbl_FADT.day_alarm) & 0x3F;
+ if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
+ day = bcd2bin(day);
+ } else
+ day = cmos_bcd_read(RTC_DAY_OF_MONTH, rtc_control);
+ if (acpi_gbl_FADT.month_alarm)
+ mo = cmos_bcd_read(acpi_gbl_FADT.month_alarm, rtc_control);
+ else {
+ mo = cmos_bcd_read(RTC_MONTH, rtc_control);
+ today = cmos_bcd_read(RTC_DAY_OF_MONTH, rtc_control);
+ }
+ if (acpi_gbl_FADT.century)
+ cent = cmos_bcd_read(acpi_gbl_FADT.century, rtc_control);
+
+ yr = cmos_bcd_read(RTC_YEAR, rtc_control);
+
+ spin_unlock_irqrestore(&rtc_lock, flags);
+
+ /* we're trusting the FADT (see above) */
+ if (!acpi_gbl_FADT.century)
+ /* If we're not trusting the FADT, we should at least make it
+ * right for _this_ century... ehm, what is _this_ century?
+ *
+ * TBD:
+ * ASAP: find piece of code in the kernel, e.g. star tracker driver,
+ * which we can trust to determine the century correctly. Atom
+ * watch driver would be nice, too...
+ *
+ * if that has not happened, change for first release in 2050:
+ * if (yr<50)
+ * yr += 2100;
+ * else
+ * yr += 2000; // current line of code
+ *
+ * if that has not happened either, please do on 2099/12/31:23:59:59
+ * s/2000/2100
+ *
+ */
+ yr += 2000;
+ else
+ yr += cent * 100;
+
+ /*
+ * Show correct dates for alarms up to a month into the future.
+ * This solves issues for nearly all situations with the common
+ * 30-day alarm clocks in PC hardware.
+ */
+ if (day < today) {
+ if (mo < 12) {
+ mo += 1;
+ } else {
+ mo = 1;
+ yr += 1;
+ }
+ }
+
+ seq_printf(seq, "%4.4u-", yr);
+ (mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo);
+ (day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day);
+ (hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr);
+ (min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min);
+ (sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec);
+
+ return 0;
+}
+
+static int acpi_system_alarm_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data);
+}
+
+static int get_date_field(char **p, u32 * value)
+{
+ char *next = NULL;
+ char *string_end = NULL;
+ int result = -EINVAL;
+
+ /*
+ * Try to find delimeter, only to insert null. The end of the
+ * string won't have one, but is still valid.
+ */
+ if (*p == NULL)
+ return result;
+
+ next = strpbrk(*p, "- :");
+ if (next)
+ *next++ = '\0';
+
+ *value = simple_strtoul(*p, &string_end, 10);
+
+ /* Signal success if we got a good digit */
+ if (string_end != *p)
+ result = 0;
+
+ if (next)
+ *p = next;
+ else
+ *p = NULL;
+
+ return result;
+}
+
+/* Read a possibly BCD register, always return binary */
+static u32 cmos_bcd_read(int offset, int rtc_control)
+{
+ u32 val = CMOS_READ(offset);
+ if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
+ val = bcd2bin(val);
+ return val;
+}
+
+/* Write binary value into possibly BCD register */
+static void cmos_bcd_write(u32 val, int offset, int rtc_control)
+{
+ if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
+ val = bin2bcd(val);
+ CMOS_WRITE(val, offset);
+}
+
+static ssize_t
+acpi_system_write_alarm(struct file *file,
+ const char __user * buffer, size_t count, loff_t * ppos)
+{
+ int result = 0;
+ char alarm_string[30] = { '\0' };
+ char *p = alarm_string;
+ u32 sec, min, hr, day, mo, yr;
+ int adjust = 0;
+ unsigned char rtc_control = 0;
+
+ if (count > sizeof(alarm_string) - 1)
+ return -EINVAL;
+
+ if (copy_from_user(alarm_string, buffer, count))
+ return -EFAULT;
+
+ alarm_string[count] = '\0';
+
+ /* check for time adjustment */
+ if (alarm_string[0] == '+') {
+ p++;
+ adjust = 1;
+ }
+
+ if ((result = get_date_field(&p, &yr)))
+ goto end;
+ if ((result = get_date_field(&p, &mo)))
+ goto end;
+ if ((result = get_date_field(&p, &day)))
+ goto end;
+ if ((result = get_date_field(&p, &hr)))
+ goto end;
+ if ((result = get_date_field(&p, &min)))
+ goto end;
+ if ((result = get_date_field(&p, &sec)))
+ goto end;
+
+ spin_lock_irq(&rtc_lock);
+
+ rtc_control = CMOS_READ(RTC_CONTROL);
+
+ if (adjust) {
+ yr += cmos_bcd_read(RTC_YEAR, rtc_control);
+ mo += cmos_bcd_read(RTC_MONTH, rtc_control);
+ day += cmos_bcd_read(RTC_DAY_OF_MONTH, rtc_control);
+ hr += cmos_bcd_read(RTC_HOURS, rtc_control);
+ min += cmos_bcd_read(RTC_MINUTES, rtc_control);
+ sec += cmos_bcd_read(RTC_SECONDS, rtc_control);
+ }
+
+ spin_unlock_irq(&rtc_lock);
+
+ if (sec > 59) {
+ min += sec/60;
+ sec = sec%60;
+ }
+ if (min > 59) {
+ hr += min/60;
+ min = min%60;
+ }
+ if (hr > 23) {
+ day += hr/24;
+ hr = hr%24;
+ }
+ if (day > 31) {
+ mo += day/32;
+ day = day%32;
+ }
+ if (mo > 12) {
+ yr += mo/13;
+ mo = mo%13;
+ }
+
+ spin_lock_irq(&rtc_lock);
+ /*
+ * Disable alarm interrupt before setting alarm timer or else
+ * when ACPI_EVENT_RTC is enabled, a spurious ACPI interrupt occurs
+ */
+ rtc_control &= ~RTC_AIE;
+ CMOS_WRITE(rtc_control, RTC_CONTROL);
+ CMOS_READ(RTC_INTR_FLAGS);
+
+ /* write the fields the rtc knows about */
+ cmos_bcd_write(hr, RTC_HOURS_ALARM, rtc_control);
+ cmos_bcd_write(min, RTC_MINUTES_ALARM, rtc_control);
+ cmos_bcd_write(sec, RTC_SECONDS_ALARM, rtc_control);
+
+ /*
+ * If the system supports an enhanced alarm it will have non-zero
+ * offsets into the CMOS RAM here -- which for some reason are pointing
+ * to the RTC area of memory.
+ */
+ if (acpi_gbl_FADT.day_alarm)
+ cmos_bcd_write(day, acpi_gbl_FADT.day_alarm, rtc_control);
+ if (acpi_gbl_FADT.month_alarm)
+ cmos_bcd_write(mo, acpi_gbl_FADT.month_alarm, rtc_control);
+ if (acpi_gbl_FADT.century) {
+ if (adjust)
+ yr += cmos_bcd_read(acpi_gbl_FADT.century, rtc_control) * 100;
+ cmos_bcd_write(yr / 100, acpi_gbl_FADT.century, rtc_control);
+ }
+ /* enable the rtc alarm interrupt */
+ rtc_control |= RTC_AIE;
+ CMOS_WRITE(rtc_control, RTC_CONTROL);
+ CMOS_READ(RTC_INTR_FLAGS);
+
+ spin_unlock_irq(&rtc_lock);
+
+ acpi_clear_event(ACPI_EVENT_RTC);
+ acpi_enable_event(ACPI_EVENT_RTC, 0);
+
+ *ppos += count;
+
+ result = 0;
+ end:
+ return result ? result : count;
+}
+#endif /* HAVE_ACPI_LEGACY_ALARM */
+
+static int
+acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
+{
+ struct list_head *node, *next;
+
+ seq_printf(seq, "Device\tS-state\t Status Sysfs node\n");
+
+ mutex_lock(&acpi_device_lock);
+ list_for_each_safe(node, next, &acpi_wakeup_device_list) {
+ struct acpi_device *dev =
+ container_of(node, struct acpi_device, wakeup_list);
+ struct device *ldev;
+
+ if (!dev->wakeup.flags.valid)
+ continue;
+
+ ldev = acpi_get_physical_device(dev->handle);
+ seq_printf(seq, "%s\t S%d\t%c%-8s ",
+ dev->pnp.bus_id,
+ (u32) dev->wakeup.sleep_state,
+ dev->wakeup.flags.run_wake ? '*' : ' ',
+ (device_may_wakeup(&dev->dev)
+ || (ldev && device_may_wakeup(ldev))) ?
+ "enabled" : "disabled");
+ if (ldev)
+ seq_printf(seq, "%s:%s",
+ ldev->bus ? ldev->bus->name : "no-bus",
+ dev_name(ldev));
+ seq_printf(seq, "\n");
+ put_device(ldev);
+
+ }
+ mutex_unlock(&acpi_device_lock);
+ return 0;
+}
+
+static void physical_device_enable_wakeup(struct acpi_device *adev)
+{
+ struct device *dev = acpi_get_physical_device(adev->handle);
+
+ if (dev && device_can_wakeup(dev)) {
+ bool enable = !device_may_wakeup(dev);
+ device_set_wakeup_enable(dev, enable);
+ }
+}
+
+static ssize_t
+acpi_system_write_wakeup_device(struct file *file,
+ const char __user * buffer,
+ size_t count, loff_t * ppos)
+{
+ struct list_head *node, *next;
+ char strbuf[5];
+ char str[5] = "";
+ unsigned int len = count;
+
+ if (len > 4)
+ len = 4;
+ if (len < 0)
+ return -EFAULT;
+
+ if (copy_from_user(strbuf, buffer, len))
+ return -EFAULT;
+ strbuf[len] = '\0';
+ sscanf(strbuf, "%s", str);
+
+ mutex_lock(&acpi_device_lock);
+ list_for_each_safe(node, next, &acpi_wakeup_device_list) {
+ struct acpi_device *dev =
+ container_of(node, struct acpi_device, wakeup_list);
+ if (!dev->wakeup.flags.valid)
+ continue;
+
+ if (!strncmp(dev->pnp.bus_id, str, 4)) {
+ if (device_can_wakeup(&dev->dev)) {
+ bool enable = !device_may_wakeup(&dev->dev);
+ device_set_wakeup_enable(&dev->dev, enable);
+ } else {
+ physical_device_enable_wakeup(dev);
+ }
+ break;
+ }
+ }
+ mutex_unlock(&acpi_device_lock);
+ return count;
+}
+
+static int
+acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_system_wakeup_device_seq_show,
+ PDE(inode)->data);
+}
+
+static const struct file_operations acpi_system_wakeup_device_fops = {
+ .owner = THIS_MODULE,
+ .open = acpi_system_wakeup_device_open_fs,
+ .read = seq_read,
+ .write = acpi_system_write_wakeup_device,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+#ifdef HAVE_ACPI_LEGACY_ALARM
+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 */
+
+int __init acpi_sleep_proc_init(void)
+{
+#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;
+}