Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 234 insertions, 0 deletions

diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
new file mode 100644
index 000000000000..0a5d2a94131e
--- /dev/null
+++ b/drivers/acpi/sleep/main.c
@@ -0,0 +1,234 @@
+/*
+ * sleep.c - ACPI sleep support.
+ *
+ * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com>
+ * Copyright (c) 2000-2003 Patrick Mochel
+ * Copyright (c) 2003 Open Source Development Lab
+ *
+ * This file is released under the GPLv2.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/dmi.h>
+#include <linux/device.h>
+#include <linux/suspend.h>
+#include <asm/io.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+#include "sleep.h"
+
+u8 sleep_states[ACPI_S_STATE_COUNT];
+
+static struct pm_ops acpi_pm_ops;
+
+extern void do_suspend_lowlevel_s4bios(void);
+extern void do_suspend_lowlevel(void);
+
+static u32 acpi_suspend_states[] = {
+        [PM_SUSPEND_ON]         = ACPI_STATE_S0,
+        [PM_SUSPEND_STANDBY]    = ACPI_STATE_S1,
+        [PM_SUSPEND_MEM]        = ACPI_STATE_S3,
+        [PM_SUSPEND_DISK]       = ACPI_STATE_S4,
+};
+
+static int init_8259A_after_S1;
+
+/**
+ *      acpi_pm_prepare - Do preliminary suspend work.
+ *      @pm_state:              suspend state we're entering.
+ *
+ *      Make sure we support the state. If we do, and we need it, set the
+ *      firmware waking vector and do arch-specific nastiness to get the 
+ *      wakeup code to the waking vector. 
+ */
+
+static int acpi_pm_prepare(suspend_state_t pm_state)
+{
+        u32 acpi_state = acpi_suspend_states[pm_state];
+
+        if (!sleep_states[acpi_state])
+                return -EPERM;
+
+        /* do we have a wakeup address for S2 and S3? */
+        /* Here, we support only S4BIOS, those we set the wakeup address */
+        /* S4OS is only supported for now via swsusp.. */
+        if (pm_state == PM_SUSPEND_MEM || pm_state == PM_SUSPEND_DISK) {
+                if (!acpi_wakeup_address)
+                        return -EFAULT;
+                acpi_set_firmware_waking_vector(
+                        (acpi_physical_address) virt_to_phys(
+                                (void *)acpi_wakeup_address));
+        }
+        ACPI_FLUSH_CPU_CACHE();
+        acpi_enable_wakeup_device_prep(acpi_state);
+        acpi_enter_sleep_state_prep(acpi_state);
+        return 0;
+}
+
+
+/**
+ *      acpi_pm_enter - Actually enter a sleep state.
+ *      @pm_state:              State we're entering.
+ *
+ *      Flush caches and go to sleep. For STR or STD, we have to call 
+ *      arch-specific assembly, which in turn call acpi_enter_sleep_state().
+ *      It's unfortunate, but it works. Please fix if you're feeling frisky.
+ */
+
+static int acpi_pm_enter(suspend_state_t pm_state)
+{
+        acpi_status status = AE_OK;
+        unsigned long flags = 0;
+        u32 acpi_state = acpi_suspend_states[pm_state];
+
+        ACPI_FLUSH_CPU_CACHE();
+
+        /* Do arch specific saving of state. */
+        if (pm_state > PM_SUSPEND_STANDBY) {
+                int error = acpi_save_state_mem();
+                if (error)
+                        return error;
+        }
+
+
+        local_irq_save(flags);
+        acpi_enable_wakeup_device(acpi_state);
+        switch (pm_state)
+        {
+        case PM_SUSPEND_STANDBY:
+                barrier();
+                status = acpi_enter_sleep_state(acpi_state);
+                break;
+
+        case PM_SUSPEND_MEM:
+                do_suspend_lowlevel();
+                break;
+
+        case PM_SUSPEND_DISK:
+                if (acpi_pm_ops.pm_disk_mode == PM_DISK_PLATFORM)
+                        status = acpi_enter_sleep_state(acpi_state);
+                else
+                        do_suspend_lowlevel_s4bios();
+                break;
+        default:
+                return -EINVAL;
+        }
+        local_irq_restore(flags);
+        printk(KERN_DEBUG "Back to C!\n");
+
+        /* restore processor state
+         * We should only be here if we're coming back from STR or STD.
+         * And, in the case of the latter, the memory image should have already
+         * been loaded from disk.
+         */
+        if (pm_state > PM_SUSPEND_STANDBY)
+                acpi_restore_state_mem();
+
+
+        return ACPI_SUCCESS(status) ? 0 : -EFAULT;
+}
+
+
+/**
+ *      acpi_pm_finish - Finish up suspend sequence.
+ *      @pm_state:              State we're coming out of.
+ *
+ *      This is called after we wake back up (or if entering the sleep state
+ *      failed). 
+ */
+
+static int acpi_pm_finish(suspend_state_t pm_state)
+{
+        u32 acpi_state = acpi_suspend_states[pm_state];
+
+        acpi_leave_sleep_state(acpi_state);
+        acpi_disable_wakeup_device(acpi_state);
+
+        /* reset firmware waking vector */
+        acpi_set_firmware_waking_vector((acpi_physical_address) 0);
+
+        if (init_8259A_after_S1) {
+                printk("Broken toshiba laptop -> kicking interrupts\n");
+                init_8259A(0);
+        }
+        return 0;
+}
+
+
+int acpi_suspend(u32 acpi_state)
+{
+        suspend_state_t states[] = {
+                [1]     = PM_SUSPEND_STANDBY,
+                [3]     = PM_SUSPEND_MEM,
+                [4]     = PM_SUSPEND_DISK,
+        };
+
+        if (acpi_state <= 4 && states[acpi_state])
+                return pm_suspend(states[acpi_state]);
+        return -EINVAL;
+}
+
+static struct pm_ops acpi_pm_ops = {
+        .prepare        = acpi_pm_prepare,
+        .enter          = acpi_pm_enter,
+        .finish         = acpi_pm_finish,
+};
+
+
+/*
+ * Toshiba fails to preserve interrupts over S1, reinitialization
+ * of 8259 is needed after S1 resume.
+ */
+static int __init init_ints_after_s1(struct dmi_system_id *d)
+{
+        printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident);
+        init_8259A_after_S1 = 1;
+        return 0;
+}
+
+static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
+        {
+                .callback = init_ints_after_s1,
+                .ident = "Toshiba Satellite 4030cdt",
+                .matches = { DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"), },
+        },
+        { },
+};
+
+static int __init acpi_sleep_init(void)
+{
+        int                     i = 0;
+
+        dmi_check_system(acpisleep_dmi_table);
+
+        if (acpi_disabled)
+                return 0;
+
+        printk(KERN_INFO PREFIX "(supports");
+        for (i=0; i < ACPI_S_STATE_COUNT; i++) {
+                acpi_status status;
+                u8 type_a, type_b;
+                status = acpi_get_sleep_type_data(i, &type_a, &type_b);
+                if (ACPI_SUCCESS(status)) {
+                        sleep_states[i] = 1;
+                        printk(" S%d", i);
+                }
+                if (i == ACPI_STATE_S4) {
+                        if (acpi_gbl_FACS->S4bios_f) {
+                                sleep_states[i] = 1;
+                                printk(" S4bios");
+                                acpi_pm_ops.pm_disk_mode = PM_DISK_FIRMWARE;
+                        }
+                        if (sleep_states[i])
+                                acpi_pm_ops.pm_disk_mode = PM_DISK_PLATFORM;
+                }
+        }
+        printk(")\n");
+
+        pm_set_ops(&acpi_pm_ops);
+        return 0;
+}
+
+late_initcall(acpi_sleep_init);