785 lines
19 KiB
C
785 lines
19 KiB
C
/* olpc-pm.c
|
|
* © 2006 Red Hat, Inc.
|
|
* Portions also copyright 2006 Advanced Micro Devices, Inc.
|
|
* GPLv2
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/module.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/input.h>
|
|
#include <linux/suspend.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/rtc.h>
|
|
#include <linux/mc146818rtc.h>
|
|
#include <asm/io.h>
|
|
|
|
#include <asm/olpc.h>
|
|
|
|
/* A few words about accessing the ACPI and PM registers. Long story short,
|
|
byte and word accesses of the ACPI and PM registers is broken. The only
|
|
way to do it really correctly is to use dword accesses, which we do
|
|
throughout this code. For more details, please consult Eratta 17 and 18
|
|
here:
|
|
|
|
http://www.amd.com/files/connectivitysolutions/geode/geode_gx/34472D_CS5536_B1_specupdate.pdf
|
|
*/
|
|
|
|
#define PM_IRQ 3
|
|
|
|
#define CS5536_PM_PWRBTN (1 << 8)
|
|
#define CS5536_PM_RTC (1 << 10)
|
|
|
|
#define GPIO_WAKEUP_EC (1 << 31)
|
|
#define GPIO_WAKEUP_LID (1 << 30)
|
|
|
|
#define PM_MODE_NORMAL 0
|
|
#define PM_MODE_TEST 1
|
|
#define PM_MODE_MAX 2
|
|
|
|
/* These, and the battery EC commands, should be in an olpc.h. */
|
|
#define EC_WRITE_SCI_MASK 0x1b
|
|
#define EC_READ_SCI_MASK 0x1c
|
|
|
|
extern void do_olpc_suspend_lowlevel(void);
|
|
|
|
static struct {
|
|
unsigned long address;
|
|
unsigned short segment;
|
|
} ofw_bios_entry = { 0, __KERNEL_CS };
|
|
|
|
static int olpc_pm_mode = PM_MODE_NORMAL;
|
|
static unsigned long acpi_base;
|
|
static unsigned long pms_base;
|
|
static int sci_irq;
|
|
static int olpc_lid_flag;
|
|
|
|
static struct input_dev *pm_inputdev;
|
|
static struct input_dev *lid_inputdev;
|
|
static struct input_dev *ebook_inputdev;
|
|
static struct pm_ops olpc_pm_ops;
|
|
|
|
static int gpio_wake_events = 0;
|
|
static int ebook_state = -1;
|
|
static u16 olpc_wakeup_mask = 0;
|
|
|
|
struct platform_device olpc_powerbutton_dev = {
|
|
.name = "powerbutton",
|
|
.id = -1,
|
|
};
|
|
|
|
struct platform_device olpc_lid_dev = {
|
|
.name = "lid",
|
|
.id = -1,
|
|
};
|
|
|
|
static void __init init_ebook_state(void)
|
|
{
|
|
if (olpc_ec_cmd(0x2a, NULL, 0, (unsigned char *) &ebook_state, 1)) {
|
|
printk(KERN_WARNING "olpc-pm: failed to get EBOOK state!\n");
|
|
ebook_state = 0;
|
|
}
|
|
ebook_state &= 1;
|
|
|
|
/* the input layer needs to know what value to default to as well */
|
|
input_report_switch(ebook_inputdev, SW_TABLET_MODE, ebook_state);
|
|
input_sync(ebook_inputdev);
|
|
}
|
|
|
|
static void (*battery_callback)(unsigned long);
|
|
static DEFINE_SPINLOCK(battery_callback_lock);
|
|
|
|
/* propagate_events is non-NULL if run from workqueue,
|
|
NULL when called at init time to flush SCI queue */
|
|
static void process_sci_queue(struct work_struct *propagate_events)
|
|
{
|
|
unsigned char data = 0;
|
|
unsigned char battery_events = 0;
|
|
int ret;
|
|
|
|
do {
|
|
ret = olpc_ec_cmd(0x84, NULL, 0, &data, 1);
|
|
if (!ret) {
|
|
printk(KERN_DEBUG "olpc-pm: SCI 0x%x received\n",
|
|
data);
|
|
|
|
switch (data) {
|
|
case EC_SCI_SRC_EMPTY:
|
|
case EC_SCI_SRC_GAME:
|
|
case EC_SCI_SRC_WLAN:
|
|
/* we ignore these for now */
|
|
break;
|
|
case EC_SCI_SRC_BATERR:
|
|
printk(KERN_ERR "olpc-pm: Battery Management System detected an error! Remove turnip from battery slot.\n");
|
|
case EC_SCI_SRC_BATSOC:
|
|
case EC_SCI_SRC_BATTERY:
|
|
case EC_SCI_SRC_ACPWR:
|
|
battery_events |= data;
|
|
break;
|
|
case EC_SCI_SRC_EBOOK:
|
|
ebook_state = !ebook_state;
|
|
if (propagate_events) {
|
|
input_report_switch(ebook_inputdev,
|
|
SW_TABLET_MODE, ebook_state);
|
|
input_sync(ebook_inputdev);
|
|
}
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "olpc-pm: Unknown SCI event 0x%x occurred!\n", data);
|
|
}
|
|
}
|
|
} while (data && !ret);
|
|
|
|
if (battery_events && battery_callback && propagate_events) {
|
|
void (*cbk)(unsigned long);
|
|
|
|
/* Older EC versions didn't distinguish between AC and battery
|
|
events */
|
|
if (olpc_platform_info.ecver < 0x45)
|
|
battery_events = EC_SCI_SRC_BATTERY | EC_SCI_SRC_ACPWR;
|
|
|
|
spin_lock(&battery_callback_lock);
|
|
cbk = battery_callback;
|
|
spin_unlock(&battery_callback_lock);
|
|
|
|
cbk(battery_events);
|
|
}
|
|
|
|
if (ret)
|
|
printk(KERN_WARNING "Failed to clear SCI queue!\n");
|
|
}
|
|
|
|
static DECLARE_WORK(sci_work, process_sci_queue);
|
|
|
|
void olpc_register_battery_callback(void (*f)(unsigned long))
|
|
{
|
|
spin_lock(&battery_callback_lock);
|
|
battery_callback = f;
|
|
spin_unlock(&battery_callback_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(olpc_register_battery_callback);
|
|
|
|
void olpc_deregister_battery_callback(void)
|
|
{
|
|
spin_lock(&battery_callback_lock);
|
|
battery_callback = NULL;
|
|
spin_unlock(&battery_callback_lock);
|
|
cancel_work_sync(&sci_work);
|
|
}
|
|
EXPORT_SYMBOL_GPL(olpc_deregister_battery_callback);
|
|
|
|
|
|
static int olpc_pm_interrupt(int irq, void *id)
|
|
{
|
|
uint32_t sts, gpe = 0;
|
|
|
|
sts = inl(acpi_base + PM1_STS);
|
|
outl(sts | 0xFFFF, acpi_base + PM1_STS);
|
|
|
|
if (olpc_get_rev() >= OLPC_REV_B2) {
|
|
gpe = inl(acpi_base + PM_GPE0_STS);
|
|
outl(0xFFFFFFFF, acpi_base + PM_GPE0_STS);
|
|
}
|
|
|
|
if (sts & CS5536_PM_PWRBTN) {
|
|
input_report_key(pm_inputdev, KEY_POWER, 1);
|
|
input_sync(pm_inputdev);
|
|
printk(KERN_DEBUG "olpm-pm: PM_PWRBTN event received\n");
|
|
/* Do we need to delay this (and hence schedule_work)? */
|
|
input_report_key(pm_inputdev, KEY_POWER, 0);
|
|
input_sync(pm_inputdev);
|
|
}
|
|
|
|
if (gpe & GPIO_WAKEUP_EC) {
|
|
geode_gpio_clear(OLPC_GPIO_ECSCI, GPIO_NEGATIVE_EDGE_STS);
|
|
schedule_work(&sci_work);
|
|
}
|
|
|
|
if (gpe & GPIO_WAKEUP_LID) {
|
|
/* Disable events */
|
|
geode_gpio_clear(OLPC_GPIO_LID, GPIO_EVENTS_ENABLE);
|
|
|
|
/* Clear the edge */
|
|
|
|
if (olpc_lid_flag)
|
|
geode_gpio_clear(OLPC_GPIO_LID, GPIO_NEGATIVE_EDGE_EN);
|
|
else
|
|
geode_gpio_clear(OLPC_GPIO_LID, GPIO_POSITIVE_EDGE_EN);
|
|
|
|
/* Clear the status too */
|
|
geode_gpio_set(OLPC_GPIO_LID, GPIO_NEGATIVE_EDGE_STS);
|
|
geode_gpio_set(OLPC_GPIO_LID, GPIO_POSITIVE_EDGE_STS);
|
|
|
|
/* The line is high when the LID is open, but SW_LID
|
|
* should be high when the LID is closed, so we pass the old
|
|
* value of olpc_lid_flag
|
|
*/
|
|
|
|
input_report_switch(lid_inputdev, SW_LID, olpc_lid_flag);
|
|
input_sync(lid_inputdev);
|
|
|
|
/* Swap the status */
|
|
olpc_lid_flag = !olpc_lid_flag;
|
|
|
|
if (olpc_lid_flag)
|
|
geode_gpio_set(OLPC_GPIO_LID, GPIO_NEGATIVE_EDGE_EN);
|
|
else
|
|
geode_gpio_set(OLPC_GPIO_LID, GPIO_POSITIVE_EDGE_EN);
|
|
|
|
/* re-enable the event */
|
|
geode_gpio_set(OLPC_GPIO_LID, GPIO_EVENTS_ENABLE);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* For now, only support STR. We also don't support suspending on
|
|
* B1s, due to difficulties with the cafe FPGA.
|
|
*/
|
|
static int olpc_pm_state_valid(suspend_state_t pm_state)
|
|
{
|
|
if (pm_state == PM_SUSPEND_MEM && olpc_rev_after(OLPC_REV_B1))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* This is a catchall function for operations that just don't belong
|
|
* anywhere else. Later we will evaluate if these belong in the
|
|
* individual device drivers or the firmware.
|
|
* If you add something to this function, please explain yourself with
|
|
* a comment.
|
|
*/
|
|
|
|
extern void gxfb_flatpanel_control(int state);
|
|
|
|
static u32 gpio_wakeup[2];
|
|
static u64 irq_sources[4];
|
|
static u64 mfgpt_irq_msr, mfgpt_nr_msr;
|
|
|
|
void olpc_fixup_wakeup(void)
|
|
{
|
|
u32 base = geode_gpio_base();
|
|
int i;
|
|
|
|
/* This clears any pending events from the status register -
|
|
* the firmware also does this, but its possible that it tries
|
|
* it too early before the key has a chance to debounce
|
|
*/
|
|
|
|
outl((CS5536_PM_PWRBTN << 16) | 0xFFFF, acpi_base + PM1_STS);
|
|
|
|
/* Enable the flatpanel sequencing as early as possible, because
|
|
it takes ~64ms to resume. This probably belongs in the firmware */
|
|
|
|
//gxfb_flatpanel_control(1);
|
|
|
|
/* Restore the interrupt sources */
|
|
wrmsrl(MSR_PIC_YSEL_LOW, irq_sources[0]);
|
|
wrmsrl(MSR_PIC_ZSEL_LOW, irq_sources[1]);
|
|
wrmsrl(MSR_PIC_YSEL_HIGH, irq_sources[2]);
|
|
wrmsrl(MSR_PIC_ZSEL_HIGH, irq_sources[3]);
|
|
|
|
/* Restore the X and Y sources for GPIO */
|
|
outl(gpio_wakeup[0], base + GPIO_MAP_X);
|
|
outl(gpio_wakeup[1], base + GPIO_MAP_Y);
|
|
|
|
/* Resture the MFGPT MSRs */
|
|
wrmsrl(MFGPT_IRQ_MSR, mfgpt_irq_msr);
|
|
wrmsrl(MFGPT_NR_MSR, mfgpt_nr_msr);
|
|
|
|
for (i=0;i<2;i++) {
|
|
/* tell the wireless module to restart USB communication */
|
|
olpc_ec_cmd(0x24, NULL, 0, NULL, 0);
|
|
}
|
|
}
|
|
|
|
void olpc_fixup_sleep(void)
|
|
{
|
|
u32 base = geode_gpio_base();
|
|
int i;
|
|
|
|
/* Save the X and Y sources for GPIO */
|
|
gpio_wakeup[0] = inl(base + GPIO_MAP_X);
|
|
gpio_wakeup[1] = inl(base + GPIO_MAP_Y);
|
|
|
|
/* Save the Y and Z unrestricted sources */
|
|
|
|
rdmsrl(MSR_PIC_YSEL_LOW, irq_sources[0]);
|
|
rdmsrl(MSR_PIC_ZSEL_LOW, irq_sources[1]);
|
|
rdmsrl(MSR_PIC_YSEL_HIGH, irq_sources[2]);
|
|
rdmsrl(MSR_PIC_ZSEL_HIGH, irq_sources[3]);
|
|
|
|
/* Turn off the MFGPT timers on the way down */
|
|
|
|
for(i = 0; i < 8; i++) {
|
|
u32 val = geode_mfgpt_read(i, MFGPT_REG_SETUP);
|
|
|
|
if (val & MFGPT_SETUP_SETUP) {
|
|
val &= ~MFGPT_SETUP_CNTEN;
|
|
geode_mfgpt_write(i, MFGPT_REG_SETUP, val);
|
|
}
|
|
}
|
|
|
|
/* Save the MFGPT MSRs */
|
|
rdmsrl(MFGPT_IRQ_MSR, mfgpt_irq_msr);
|
|
rdmsrl(MFGPT_NR_MSR, mfgpt_nr_msr);
|
|
|
|
if (device_may_wakeup(&olpc_powerbutton_dev.dev))
|
|
olpc_wakeup_mask |= CS5536_PM_PWRBTN;
|
|
else
|
|
olpc_wakeup_mask &= ~(CS5536_PM_PWRBTN);
|
|
|
|
if (device_may_wakeup(&olpc_lid_dev.dev)) {
|
|
geode_gpio_set(OLPC_GPIO_LID, GPIO_EVENTS_ENABLE);
|
|
gpio_wake_events |= GPIO_WAKEUP_LID;
|
|
} else {
|
|
geode_gpio_clear(OLPC_GPIO_LID, GPIO_EVENTS_ENABLE);
|
|
gpio_wake_events &= ~(GPIO_WAKEUP_LID);
|
|
}
|
|
}
|
|
|
|
static int olpc_pm_enter(suspend_state_t pm_state)
|
|
{
|
|
/* Only STR is supported */
|
|
if (pm_state != PM_SUSPEND_MEM)
|
|
return -EINVAL;
|
|
|
|
olpc_fixup_sleep();
|
|
|
|
/* Set the GPIO wakeup bits */
|
|
outl(gpio_wake_events, acpi_base + PM_GPE0_EN);
|
|
outl(0xFFFFFFFF, acpi_base + PM_GPE0_STS);
|
|
|
|
/* Save CPU state */
|
|
do_olpc_suspend_lowlevel();
|
|
|
|
olpc_fixup_wakeup();
|
|
|
|
/* Restore the SCI wakeup events */
|
|
outl(gpio_wake_events, acpi_base + PM_GPE0_EN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int asmlinkage olpc_do_sleep(u8 sleep_state)
|
|
{
|
|
void *pgd_addr = __va(read_cr3());
|
|
printk(KERN_ERR "olpc_do_sleep!\n"); /* this needs to remain here so
|
|
* that gcc doesn't optimize
|
|
* away our __va! */
|
|
/* FIXME: Set the SCI bits we want to wake up on here */
|
|
|
|
/* FIXME: Set any other SCI events that we might want here */
|
|
|
|
outl((olpc_wakeup_mask << 16) | 0xFFFF, acpi_base + PM1_STS);
|
|
|
|
/* If we are in test mode, then just return (simulate a successful
|
|
suspend/resume). Otherwise, if we are doing the real thing,
|
|
then go for the gusto */
|
|
|
|
if (olpc_pm_mode != PM_MODE_TEST) {
|
|
__asm__ __volatile__("movl %0,%%eax" : : "r" (pgd_addr));
|
|
__asm__("call *(%%edi); cld"
|
|
: : "D" (&ofw_bios_entry));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* This code will slowly disappear as we fixup the issues in the BIOS */
|
|
|
|
static void __init olpc_fixup_bios(void)
|
|
{
|
|
unsigned long hi, lo;
|
|
|
|
if (olpc_has_vsa()) {
|
|
/* The VSA aggressively sets up the ACPI and PM register for
|
|
* trapping - its not enough to force these values in the BIOS -
|
|
* they seem to be changed during PCI init as well.
|
|
*/
|
|
|
|
/* Change the PM registers to decode to the DD */
|
|
|
|
rdmsr(0x510100e2, lo, hi);
|
|
hi |= 0x80000000;
|
|
wrmsr(0x510100e2, lo, hi);
|
|
|
|
/* Change the ACPI registers to decode to the DD */
|
|
|
|
rdmsr(0x510100e3, lo, hi);
|
|
hi |= 0x80000000;
|
|
wrmsr(0x510100e3, lo, hi);
|
|
}
|
|
|
|
/* GPIO24 controls WORK_AUX */
|
|
|
|
geode_gpio_set(OLPC_GPIO_WORKAUX, GPIO_OUTPUT_ENABLE);
|
|
geode_gpio_set(OLPC_GPIO_WORKAUX, GPIO_OUTPUT_AUX1);
|
|
|
|
if (olpc_get_rev() >= OLPC_REV_B2) {
|
|
/* GPIO10 is connected to the thermal alarm */
|
|
geode_gpio_set(OLPC_GPIO_THRM_ALRM, GPIO_INPUT_ENABLE);
|
|
geode_gpio_set(OLPC_GPIO_THRM_ALRM, GPIO_INPUT_AUX1);
|
|
|
|
/* Set up to get LID events */
|
|
geode_gpio_set(OLPC_GPIO_LID, GPIO_INPUT_ENABLE);
|
|
|
|
/* Clear edge detection and event enable for now */
|
|
geode_gpio_clear(OLPC_GPIO_LID, GPIO_EVENTS_ENABLE);
|
|
geode_gpio_clear(OLPC_GPIO_LID, GPIO_NEGATIVE_EDGE_EN);
|
|
geode_gpio_clear(OLPC_GPIO_LID, GPIO_POSITIVE_EDGE_EN);
|
|
|
|
geode_gpio_set(OLPC_GPIO_LID, GPIO_NEGATIVE_EDGE_STS);
|
|
geode_gpio_set(OLPC_GPIO_LID, GPIO_POSITIVE_EDGE_STS);
|
|
|
|
/* Set the LID to cause an PME event on group 6 */
|
|
geode_gpio_event_pme(OLPC_GPIO_LID, 6);
|
|
|
|
/* Set PME group 6 to fire the SCI interrupt */
|
|
geode_gpio_set_irq(6, sci_irq);
|
|
}
|
|
|
|
geode_gpio_set(OLPC_GPIO_ECSCI, GPIO_INPUT_ENABLE);
|
|
|
|
/* Clear pending events */
|
|
|
|
geode_gpio_set(OLPC_GPIO_ECSCI, GPIO_NEGATIVE_EDGE_STS);
|
|
geode_gpio_set(OLPC_GPIO_ECSCI, GPIO_POSITIVE_EDGE_STS);
|
|
|
|
//geode_gpio_set(OLPC_GPIO_ECSCI, GPIO_NEGATIVE_EDGE_EN);
|
|
geode_gpio_set(OLPC_GPIO_ECSCI, GPIO_EVENTS_ENABLE);
|
|
|
|
/* Set the SCI to cause a PME event on group 7 */
|
|
geode_gpio_event_pme(OLPC_GPIO_ECSCI, 7);
|
|
|
|
/* And have group 6 also fire the SCI interrupt */
|
|
geode_gpio_set_irq(7, sci_irq);
|
|
}
|
|
|
|
/* This provides a control file for setting up testing of the
|
|
power management system. For now, there is just one setting:
|
|
"test" which means that we don't actually enter the power
|
|
off routine.
|
|
*/
|
|
|
|
static const char * const pm_states[] = {
|
|
[PM_MODE_NORMAL] = "normal",
|
|
[PM_MODE_TEST] = "test",
|
|
};
|
|
|
|
extern struct mutex pm_mutex;
|
|
extern struct kset power_subsys;
|
|
|
|
static ssize_t control_show(struct kset *s, char *buf)
|
|
{
|
|
return sprintf(buf, "%s\n", pm_states[olpc_pm_mode]);
|
|
}
|
|
|
|
static ssize_t control_store(struct kset *s, const char *buf, size_t n)
|
|
{
|
|
int i, len;
|
|
char *p;
|
|
|
|
p = memchr(buf, '\n', n);
|
|
len = p ? p - buf : n;
|
|
|
|
/* Grab the mutex */
|
|
mutex_lock(&pm_mutex);
|
|
|
|
for(i = 0; i < PM_MODE_MAX; i++) {
|
|
if (!strncmp(buf, pm_states[i], len)) {
|
|
olpc_pm_mode = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&pm_mutex);
|
|
|
|
return (i == PM_MODE_MAX) ? -EINVAL : n;
|
|
}
|
|
|
|
static struct subsys_attribute control_attr = {
|
|
.attr = {
|
|
.name = "olpc-pm",
|
|
.mode = 0644,
|
|
},
|
|
.show = control_show,
|
|
.store = control_store,
|
|
};
|
|
|
|
static struct attribute * olpc_attributes[] = {
|
|
&control_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group olpc_attrs = {
|
|
.attrs = olpc_attributes,
|
|
};
|
|
|
|
static int __init alloc_inputdevs(void)
|
|
{
|
|
int ret = -ENOMEM;
|
|
|
|
pm_inputdev = input_allocate_device();
|
|
if (!pm_inputdev)
|
|
goto err;
|
|
|
|
pm_inputdev->name = "OLPC PM";
|
|
pm_inputdev->phys = "olpc_pm/input0";
|
|
set_bit(EV_KEY, pm_inputdev->evbit);
|
|
set_bit(KEY_POWER, pm_inputdev->keybit);
|
|
|
|
ret = input_register_device(pm_inputdev);
|
|
if (ret) {
|
|
printk(KERN_ERR "olpc-pm: failed to register PM input device: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
lid_inputdev = input_allocate_device();
|
|
if (!lid_inputdev)
|
|
goto err;
|
|
|
|
lid_inputdev->name = "OLPC lid switch";
|
|
lid_inputdev->phys = "olpc_pm/input1";
|
|
set_bit(EV_SW, lid_inputdev->evbit);
|
|
set_bit(SW_LID, lid_inputdev->swbit);
|
|
|
|
ret = input_register_device(lid_inputdev);
|
|
if (ret) {
|
|
printk(KERN_ERR "olpc-pm: failed to register lid input device: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
ebook_inputdev = input_allocate_device();
|
|
if (!ebook_inputdev)
|
|
goto err;
|
|
|
|
ebook_inputdev->name = "OLPC ebook switch";
|
|
ebook_inputdev->phys = "olpc_pm/input2";
|
|
set_bit(EV_SW, ebook_inputdev->evbit);
|
|
set_bit(SW_TABLET_MODE, ebook_inputdev->swbit);
|
|
|
|
ret = input_register_device(ebook_inputdev);
|
|
if (ret) {
|
|
printk(KERN_ERR "olpc-pm: failed to register ebook input device: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
return ret;
|
|
err:
|
|
if (ebook_inputdev) {
|
|
input_unregister_device(ebook_inputdev);
|
|
ebook_inputdev = NULL;
|
|
}
|
|
if (lid_inputdev) {
|
|
input_unregister_device(lid_inputdev);
|
|
lid_inputdev = NULL;
|
|
}
|
|
if (pm_inputdev) {
|
|
input_unregister_device(pm_inputdev);
|
|
pm_inputdev = NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __init olpc_pm_init(void)
|
|
{
|
|
uint32_t lo, hi;
|
|
int ret;
|
|
uint8_t ec_byte;
|
|
|
|
if (!machine_is_olpc())
|
|
return -ENODEV;
|
|
|
|
acpi_base = geode_acpi_base();
|
|
pms_base = geode_pms_base();
|
|
|
|
if (!acpi_base || !pms_base)
|
|
return -ENODEV;
|
|
|
|
ret = alloc_inputdevs();
|
|
if (ret)
|
|
return ret;
|
|
|
|
rdmsr(0x51400020, lo, hi);
|
|
sci_irq = (lo >> 20) & 15;
|
|
|
|
if (sci_irq) {
|
|
printk(KERN_INFO "SCI is mapped to IRQ %d\n", sci_irq);
|
|
} else {
|
|
/* Zero doesn't mean zero -- it means masked */
|
|
printk(KERN_INFO "SCI unmapped. Mapping to IRQ 3\n");
|
|
sci_irq = 3;
|
|
lo |= 0x00300000;
|
|
wrmsrl(0x51400020, lo);
|
|
}
|
|
|
|
olpc_fixup_bios();
|
|
|
|
lo = inl(pms_base + PM_FSD);
|
|
|
|
/* Lock, enable failsafe, 4 seconds */
|
|
outl(0xc001f400, pms_base + PM_FSD);
|
|
|
|
/* Here we set up the SCI events we're interested in during
|
|
* real-time. We have no sleep button, and the RTC doesn't make
|
|
* sense, so set up the power button
|
|
*/
|
|
|
|
outl(inl(acpi_base) | ((CS5536_PM_PWRBTN) << 16), acpi_base);
|
|
|
|
if (olpc_get_rev() >= OLPC_REV_B2) {
|
|
gpio_wake_events |= GPIO_WAKEUP_LID;
|
|
|
|
/* Get the current value of the GPIO, and set up the edges */
|
|
olpc_lid_flag = geode_gpio_isset(OLPC_GPIO_LID, GPIO_READ_BACK);
|
|
|
|
/* Watch for the opposite edge */
|
|
|
|
if (olpc_lid_flag)
|
|
geode_gpio_set(OLPC_GPIO_LID, GPIO_NEGATIVE_EDGE_EN);
|
|
else
|
|
geode_gpio_set(OLPC_GPIO_LID, GPIO_POSITIVE_EDGE_EN);
|
|
|
|
/* Enable the event */
|
|
geode_gpio_set(OLPC_GPIO_LID, GPIO_EVENTS_ENABLE);
|
|
}
|
|
|
|
/* Set up the mask for wakeups the EC will generate SCIs on */
|
|
|
|
ret = olpc_ec_cmd(EC_READ_SCI_MASK, NULL, 0, &ec_byte, 1);
|
|
if (ret)
|
|
printk(KERN_ERR "Error getting the EC SCI mask: %d\n", ret);
|
|
|
|
/* Disable battery 1% charge wakeups */
|
|
ec_byte &= ~EC_SCI_SRC_BATSOC;
|
|
|
|
ret = olpc_ec_cmd(EC_WRITE_SCI_MASK, &ec_byte, 1, NULL, 0);
|
|
if (ret)
|
|
printk(KERN_ERR "Error setting the EC SCI mask: %d\n", ret);
|
|
|
|
/* Set up the EC SCI */
|
|
|
|
gpio_wake_events |= GPIO_WAKEUP_EC;
|
|
|
|
outl(gpio_wake_events, acpi_base + PM_GPE0_EN);
|
|
outl(0xFFFFFFFF, acpi_base + PM_GPE0_STS);
|
|
|
|
/* Select level triggered in PIC */
|
|
|
|
if (sci_irq < 8) {
|
|
lo = inb(0x4d0);
|
|
lo |= 1 << sci_irq;
|
|
outb(lo, 0x4d0);
|
|
} else {
|
|
lo = inb(0x4d1);
|
|
lo |= 1 << (sci_irq - 8);
|
|
outb(lo, 0x4d1);
|
|
}
|
|
/* Clear pending interrupt */
|
|
outl(inl(acpi_base) | 0xFFFF, acpi_base);
|
|
process_sci_queue(0); /* we just want to flush the queue here */
|
|
init_ebook_state();
|
|
|
|
/* Enable the interrupt */
|
|
|
|
ret = request_irq(sci_irq, &olpc_pm_interrupt, 0, "SCI", &acpi_base);
|
|
|
|
if (ret) {
|
|
printk(KERN_ERR "Error registering SCI: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ofw_bios_entry.address = 0xF0000 + PAGE_OFFSET;
|
|
pm_set_ops(&olpc_pm_ops);
|
|
|
|
sysfs_create_group(&power_subsys.kobj, &olpc_attrs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
#if defined (CONFIG_RTC_DRV_CMOS) || defined (CONFIG_RTC_DRV_CMOS_MODULE)
|
|
struct resource rtc_platform_resource[2] = {
|
|
{
|
|
.flags = IORESOURCE_IO,
|
|
.start = RTC_PORT(0),
|
|
.end = RTC_PORT(0) + RTC_IO_EXTENT
|
|
},
|
|
{
|
|
.flags = IORESOURCE_IRQ,
|
|
.start = 8,
|
|
.end = 8,
|
|
},
|
|
};
|
|
|
|
|
|
static void rtc_wake_on(struct device *dev)
|
|
{
|
|
olpc_wakeup_mask |= CS5536_PM_RTC;
|
|
}
|
|
|
|
static void rtc_wake_off(struct device *dev)
|
|
{
|
|
olpc_wakeup_mask &= ~(CS5536_PM_RTC);
|
|
}
|
|
|
|
static struct cmos_rtc_board_info rtc_info = {
|
|
.rtc_day_alarm = 0,
|
|
.rtc_mon_alarm = 0,
|
|
.rtc_century = 0,
|
|
.wake_on = rtc_wake_on,
|
|
.wake_off = rtc_wake_off,
|
|
};
|
|
|
|
struct platform_device olpc_rtc_device = {
|
|
.name = "rtc_cmos",
|
|
.id = -1,
|
|
.num_resources = ARRAY_SIZE(rtc_platform_resource),
|
|
.dev.platform_data = &rtc_info,
|
|
.resource = rtc_platform_resource,
|
|
};
|
|
|
|
static int __init olpc_platform_init(void)
|
|
{
|
|
(void)platform_device_register(&olpc_rtc_device);
|
|
device_init_wakeup(&olpc_rtc_device.dev, 1);
|
|
|
|
(void)platform_device_register(&olpc_powerbutton_dev);
|
|
device_init_wakeup(&olpc_powerbutton_dev.dev, 1);
|
|
|
|
(void)platform_device_register(&olpc_lid_dev);
|
|
device_init_wakeup(&olpc_lid_dev.dev, 1);
|
|
|
|
return 0;
|
|
}
|
|
arch_initcall(olpc_platform_init);
|
|
#endif /* CONFIG_RTC_DRV_CMOS */
|
|
|
|
static void olpc_pm_exit(void)
|
|
{
|
|
/* Clear any pending events, and disable them */
|
|
outl(0xFFFF, acpi_base+2);
|
|
|
|
free_irq(sci_irq, &acpi_base);
|
|
input_unregister_device(pm_inputdev);
|
|
input_unregister_device(lid_inputdev);
|
|
input_unregister_device(ebook_inputdev);
|
|
}
|
|
|
|
static struct pm_ops olpc_pm_ops = {
|
|
.valid = olpc_pm_state_valid,
|
|
.enter = olpc_pm_enter,
|
|
};
|
|
|
|
module_init(olpc_pm_init);
|
|
module_exit(olpc_pm_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
|
|
MODULE_DESCRIPTION("AMD Geode power management for OLPC CL1");
|