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linux-davinci-2.6.23
Commit ed3269a3 authored by Len Brown's avatar Len Brown
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Pull ec into test branch

parents d7321ad2 ab9e43c6
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Showing with 296 additions and 803 deletions
drivers/acpi/ec.c
View file @ ed3269a3
......@@ -45,206 +45,143 @@ ACPI_MODULE_NAME("acpi_ec")
#define ACPI_EC_DRIVER_NAME "ACPI Embedded Controller Driver"
#define ACPI_EC_DEVICE_NAME "Embedded Controller"
#define ACPI_EC_FILE_INFO "info"
/* EC status register */
#define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */
#define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */
#define ACPI_EC_FLAG_BURST 0x10 /* burst mode */
#define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */
#define ACPI_EC_EVENT_OBF 0x01 /* Output buffer full */
#define ACPI_EC_EVENT_IBE 0x02 /* Input buffer empty */
#define ACPI_EC_DELAY 50 /* Wait 50ms max. during EC ops */
#define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */
#define ACPI_EC_UDELAY 100 /* Poll @ 100us increments */
#define ACPI_EC_UDELAY_COUNT 1000 /* Wait 10ms max. during EC ops */
/* EC commands */
#define ACPI_EC_COMMAND_READ 0x80
#define ACPI_EC_COMMAND_WRITE 0x81
#define ACPI_EC_BURST_ENABLE 0x82
#define ACPI_EC_BURST_DISABLE 0x83
#define ACPI_EC_COMMAND_QUERY 0x84
#define EC_POLL 0xFF
#define EC_INTR 0x00
/* EC events */
enum {
ACPI_EC_EVENT_OBF_1 = 1, /* Output buffer full */
ACPI_EC_EVENT_IBF_0, /* Input buffer empty */
};
#define ACPI_EC_DELAY 50 /* Wait 50ms max. during EC ops */
#define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */
#define ACPI_EC_UDELAY 100 /* Poll @ 100us increments */
#define ACPI_EC_UDELAY_COUNT 1000 /* Wait 10ms max. during EC ops */
enum {
EC_INTR = 1, /* Output buffer full */
EC_POLL, /* Input buffer empty */
};
static int acpi_ec_remove(struct acpi_device *device, int type);
static int acpi_ec_start(struct acpi_device *device);
static int acpi_ec_stop(struct acpi_device *device, int type);
static int acpi_ec_intr_add(struct acpi_device *device);
static int acpi_ec_poll_add(struct acpi_device *device);
static int acpi_ec_add(struct acpi_device *device);
static struct acpi_driver acpi_ec_driver = {
.name = ACPI_EC_DRIVER_NAME,
.class = ACPI_EC_CLASS,
.ids = ACPI_EC_HID,
.ops = {
.add = acpi_ec_intr_add,
.add = acpi_ec_add,
.remove = acpi_ec_remove,
.start = acpi_ec_start,
.stop = acpi_ec_stop,
},
};
union acpi_ec {
struct {
u32 mode;
acpi_handle handle;
unsigned long uid;
unsigned long gpe_bit;
struct acpi_generic_address status_addr;
struct acpi_generic_address command_addr;
struct acpi_generic_address data_addr;
unsigned long global_lock;
} common;
struct {
u32 mode;
/* If we find an EC via the ECDT, we need to keep a ptr to its context */
struct acpi_ec {
acpi_handle handle;
unsigned long uid;
unsigned long gpe_bit;
struct acpi_generic_address status_addr;
struct acpi_generic_address command_addr;
struct acpi_generic_address data_addr;
unsigned long command_addr;
unsigned long data_addr;
unsigned long global_lock;
struct semaphore sem;
unsigned int expect_event;
atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */
atomic_t pending_gpe;
struct semaphore sem;
wait_queue_head_t wait;
} intr;
struct {
u32 mode;
acpi_handle handle;
unsigned long uid;
unsigned long gpe_bit;
struct acpi_generic_address status_addr;
struct acpi_generic_address command_addr;
struct acpi_generic_address data_addr;
unsigned long global_lock;
struct semaphore sem;
} poll;
};
static int acpi_ec_poll_wait(union acpi_ec *ec, u8 event);
static int acpi_ec_intr_wait(union acpi_ec *ec, unsigned int event);
static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data);
static int acpi_ec_intr_read(union acpi_ec *ec, u8 address, u32 * data);
static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data);
static int acpi_ec_intr_write(union acpi_ec *ec, u8 address, u8 data);
static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data);
static int acpi_ec_intr_query(union acpi_ec *ec, u32 * data);
static void acpi_ec_gpe_poll_query(void *ec_cxt);
static void acpi_ec_gpe_intr_query(void *ec_cxt);
static u32 acpi_ec_gpe_poll_handler(void *data);
static u32 acpi_ec_gpe_intr_handler(void *data);
static acpi_status __init
acpi_fake_ecdt_poll_callback(acpi_handle handle,
u32 Level, void *context, void **retval);
static acpi_status __init
acpi_fake_ecdt_intr_callback(acpi_handle handle,
u32 Level, void *context, void **retval);
static int __init acpi_ec_poll_get_real_ecdt(void);
static int __init acpi_ec_intr_get_real_ecdt(void);
/* If we find an EC via the ECDT, we need to keep a ptr to its context */
static union acpi_ec *ec_ecdt;
} *ec_ecdt;
/* External interfaces use first EC only, so remember */
static struct acpi_device *first_ec;
static int acpi_ec_poll_mode = EC_INTR;
static int acpi_ec_mode = EC_INTR;
/* --------------------------------------------------------------------------
Transaction Management
-------------------------------------------------------------------------- */
static u32 acpi_ec_read_status(union acpi_ec *ec)
static inline u8 acpi_ec_read_status(struct acpi_ec *ec)
{
u32 status = 0;
acpi_hw_low_level_read(8, &status, &ec->common.status_addr);
return status;
return inb(ec->command_addr);
}
static int acpi_ec_wait(union acpi_ec *ec, u8 event)
static inline u8 acpi_ec_read_data(struct acpi_ec *ec)
{
if (acpi_ec_poll_mode)
return acpi_ec_poll_wait(ec, event);
else
return acpi_ec_intr_wait(ec, event);
return inb(ec->data_addr);
}
static int acpi_ec_poll_wait(union acpi_ec *ec, u8 event)
static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command)
{
u32 acpi_ec_status = 0;
u32 i = ACPI_EC_UDELAY_COUNT;
outb(command, ec->command_addr);
}
if (!ec)
return -EINVAL;
static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
{
outb(data, ec->data_addr);
}
/* Poll the EC status register waiting for the event to occur. */
static int acpi_ec_check_status(u8 status, u8 event)
{
switch (event) {
case ACPI_EC_EVENT_OBF:
do {
acpi_hw_low_level_read(8, &acpi_ec_status,
&ec->common.status_addr);
if (acpi_ec_status & ACPI_EC_FLAG_OBF)
return 0;
udelay(ACPI_EC_UDELAY);
} while (--i > 0);
case ACPI_EC_EVENT_OBF_1:
if (status & ACPI_EC_FLAG_OBF)
return 1;
break;
case ACPI_EC_EVENT_IBE:
do {
acpi_hw_low_level_read(8, &acpi_ec_status,
&ec->common.status_addr);
if (!(acpi_ec_status & ACPI_EC_FLAG_IBF))
return 0;
udelay(ACPI_EC_UDELAY);
} while (--i > 0);
case ACPI_EC_EVENT_IBF_0:
if (!(status & ACPI_EC_FLAG_IBF))
return 1;
break;
default:
return -EINVAL;
break;
}
return -ETIME;
return 0;
}
static int acpi_ec_intr_wait(union acpi_ec *ec, unsigned int event)
{
int result = 0;
static int acpi_ec_wait(struct acpi_ec *ec, u8 event)
{
int i = (acpi_ec_mode == EC_POLL) ? ACPI_EC_UDELAY_COUNT : 0;
long time_left;
ec->intr.expect_event = event;
smp_mb();
switch (event) {
case ACPI_EC_EVENT_IBE:
if (~acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) {
ec->intr.expect_event = 0;
ec->expect_event = event;
if (acpi_ec_check_status(acpi_ec_read_status(ec), event)) {
ec->expect_event = 0;
return 0;
}
break;
default:
break;
}
result = wait_event_timeout(ec->intr.wait,
!ec->intr.expect_event,
do {
if (acpi_ec_mode == EC_POLL) {
udelay(ACPI_EC_UDELAY);
} else {
time_left = wait_event_timeout(ec->wait,
!ec->expect_event,
msecs_to_jiffies(ACPI_EC_DELAY));
ec->intr.expect_event = 0;
smp_mb();
/*
* Verify that the event in question has actually happened by
* querying EC status. Do the check even if operation timed-out
* to make sure that we did not miss interrupt.
*/
switch (event) {
case ACPI_EC_EVENT_OBF:
if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_OBF)
if (time_left > 0) {
ec->expect_event = 0;
return 0;
break;
case ACPI_EC_EVENT_IBE:
if (~acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF)
}
}
if (acpi_ec_check_status(acpi_ec_read_status(ec), event)) {
ec->expect_event = 0;
return 0;
break;
}
} while (--i > 0);
ec->expect_event = 0;
return -ETIME;
}
......@@ -254,272 +191,150 @@ static int acpi_ec_intr_wait(union acpi_ec *ec, unsigned int event)
* Note: samsung nv5000 doesn't work with ec burst mode.
* http://bugzilla.kernel.org/show_bug.cgi?id=4980
*/
int acpi_ec_enter_burst_mode(union acpi_ec *ec)
int acpi_ec_enter_burst_mode(struct acpi_ec *ec)
{
u32 tmp = 0;
int status = 0;
u8 tmp = 0;
u8 status = 0;
status = acpi_ec_read_status(ec);
if (status != -EINVAL && !(status & ACPI_EC_FLAG_BURST)) {
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
if (status)
goto end;
acpi_hw_low_level_write(8, ACPI_EC_BURST_ENABLE,
&ec->common.command_addr);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
acpi_hw_low_level_read(8, &tmp, &ec->common.data_addr);
acpi_ec_write_cmd(ec, ACPI_EC_BURST_ENABLE);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1);
tmp = acpi_ec_read_data(ec);
if (tmp != 0x90) { /* Burst ACK byte */
return -EINVAL;
}
}
atomic_set(&ec->intr.leaving_burst, 0);
atomic_set(&ec->leaving_burst, 0);
return 0;
end:
ACPI_EXCEPTION ((AE_INFO, status, "EC wait, burst mode");
ACPI_EXCEPTION((AE_INFO, status, "EC wait, burst mode"));
return -1;
}
int acpi_ec_leave_burst_mode(union acpi_ec *ec)
int acpi_ec_leave_burst_mode(struct acpi_ec *ec)
{
int status = 0;
u8 status = 0;
status = acpi_ec_read_status(ec);
if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)){
status = acpi_ec_wait(ec, ACPI_EC_FLAG_IBF);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
if(status)
goto end;
acpi_hw_low_level_write(8, ACPI_EC_BURST_DISABLE, &ec->common.command_addr);
acpi_ec_wait(ec, ACPI_EC_FLAG_IBF);
acpi_ec_write_cmd(ec, ACPI_EC_BURST_DISABLE);
acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
}
atomic_set(&ec->intr.leaving_burst, 1);
atomic_set(&ec->leaving_burst, 1);
return 0;
end:
ACPI_EXCEPTION((AE_INFO, status, "EC leave burst mode");
end:
ACPI_EXCEPTION((AE_INFO, status, "EC leave burst mode"));
return -1;
}
#endif /* ACPI_FUTURE_USAGE */
static int acpi_ec_read(union acpi_ec *ec, u8 address, u32 * data)
static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
const u8 *wdata, unsigned wdata_len,
u8 *rdata, unsigned rdata_len)
{
if (acpi_ec_poll_mode)
return acpi_ec_poll_read(ec, address, data);
else
return acpi_ec_intr_read(ec, address, data);
}
static int acpi_ec_write(union acpi_ec *ec, u8 address, u8 data)
{
if (acpi_ec_poll_mode)
return acpi_ec_poll_write(ec, address, data);
else
return acpi_ec_intr_write(ec, address, data);
}
static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data)
{
acpi_status status = AE_OK;
int result = 0;
u32 glk = 0;
int result;
acpi_ec_write_cmd(ec, command);
if (!ec || !data)
return -EINVAL;
*data = 0;
if (ec->common.global_lock) {
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
if (ACPI_FAILURE(status))
return -ENODEV;
}
if (down_interruptible(&ec->poll.sem)) {
result = -ERESTARTSYS;
goto end_nosem;
}
acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ,
&ec->common.command_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
if (result)
goto end;
acpi_hw_low_level_write(8, address, &ec->common.data_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
for (; wdata_len > 0; wdata_len --) {
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
if (result)
goto end;
acpi_hw_low_level_read(8, data, &ec->common.data_addr);
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n",
*data, address));
end:
up(&ec->poll.sem);
end_nosem:
if (ec->common.global_lock)
acpi_release_global_lock(glk);
return result;
}
static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data)
{
int result = 0;
acpi_status status = AE_OK;
u32 glk = 0;
if (!ec)
return -EINVAL;
if (ec->common.global_lock) {
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
if (ACPI_FAILURE(status))
return -ENODEV;
}
if (down_interruptible(&ec->poll.sem)) {
result = -ERESTARTSYS;
goto end_nosem;
acpi_ec_write_data(ec, *(wdata++));
}
acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE,
&ec->common.command_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
if (command == ACPI_EC_COMMAND_WRITE) {
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
if (result)
goto end;
acpi_hw_low_level_write(8, address, &ec->common.data_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
if (result)
goto end;
return result;
}
acpi_hw_low_level_write(8, data, &ec->common.data_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
for (; rdata_len > 0; rdata_len --) {
result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1);
if (result)
goto end;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n",
data, address));
return result;
end:
up(&ec->poll.sem);
end_nosem:
if (ec->common.global_lock)
acpi_release_global_lock(glk);
*(rdata++) = acpi_ec_read_data(ec);
}
return result;
return 0;
}
static int acpi_ec_intr_read(union acpi_ec *ec, u8 address, u32 * data)
static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
const u8 *wdata, unsigned wdata_len,
u8 *rdata, unsigned rdata_len)
{
int status = 0;
int status;
u32 glk;
if (!ec || !data)
if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata))
return -EINVAL;
*data = 0;
if (rdata)
memset(rdata, 0, rdata_len);
if (ec->common.global_lock) {
if (ec->global_lock) {
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
if (ACPI_FAILURE(status))
return -ENODEV;
}
down(&ec->sem);
WARN_ON(in_interrupt());
down(&ec->intr.sem);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
if (status) {
printk(KERN_DEBUG PREFIX "read EC, IB not empty\n");
goto end;
}
acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ,
&ec->common.command_addr);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
if (status) {
printk(KERN_DEBUG PREFIX "read EC, IB not empty\n");
}
acpi_hw_low_level_write(8, address, &ec->common.data_addr);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
if (status) {
printk(KERN_DEBUG PREFIX "read EC, OB not full\n");
goto end;
}
acpi_hw_low_level_read(8, data, &ec->common.data_addr);
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n",
*data, address));
status = acpi_ec_transaction_unlocked(ec, command,
wdata, wdata_len,
rdata, rdata_len);
end:
up(&ec->intr.sem);
end:
up(&ec->sem);
if (ec->common.global_lock)
if (ec->global_lock)
acpi_release_global_lock(glk);
return status;
}
static int acpi_ec_intr_write(union acpi_ec *ec, u8 address, u8 data)
static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 *data)
{
int status = 0;
u32 glk;
if (!ec)
return -EINVAL;
int result;
u8 d;
if (ec->common.global_lock) {
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
if (ACPI_FAILURE(status))
return -ENODEV;
}
WARN_ON(in_interrupt());
down(&ec->intr.sem);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
if (status) {
printk(KERN_DEBUG PREFIX "write EC, IB not empty\n");
}
acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE,
&ec->common.command_addr);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
if (status) {
printk(KERN_DEBUG PREFIX "write EC, IB not empty\n");
}
acpi_hw_low_level_write(8, address, &ec->common.data_addr);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
if (status) {
printk(KERN_DEBUG PREFIX "write EC, IB not empty\n");
}
acpi_hw_low_level_write(8, data, &ec->common.data_addr);
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n",
data, address));
up(&ec->intr.sem);
if (ec->common.global_lock)
acpi_release_global_lock(glk);
result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ,
&address, 1, &d, 1);
*data = d;
return result;
}
return status;
static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)
{
u8 wdata[2] = { address, data };
return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE,
wdata, 2, NULL, 0);
}
/*
* Externally callable EC access functions. For now, assume 1 EC only
*/
int ec_read(u8 addr, u8 * val)
int ec_read(u8 addr, u8 *val)
{
union acpi_ec *ec;
struct acpi_ec *ec;
int err;
u32 temp_data;
u8 temp_data;
if (!first_ec)
return -ENODEV;
......@@ -539,7 +354,7 @@ EXPORT_SYMBOL(ec_read);
int ec_write(u8 addr, u8 val)
{
union acpi_ec *ec;
struct acpi_ec *ec;
int err;
if (!first_ec)
......@@ -554,255 +369,106 @@ int ec_write(u8 addr, u8 val)
EXPORT_SYMBOL(ec_write);
static int acpi_ec_query(union acpi_ec *ec, u32 * data)
{
if (acpi_ec_poll_mode)
return acpi_ec_poll_query(ec, data);
else
return acpi_ec_intr_query(ec, data);
}
static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data)
extern int ec_transaction(u8 command,
const u8 *wdata, unsigned wdata_len,
u8 *rdata, unsigned rdata_len)
{
int result = 0;
acpi_status status = AE_OK;
u32 glk = 0;
if (!ec || !data)
return -EINVAL;
struct acpi_ec *ec;
*data = 0;
if (ec->common.global_lock) {
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
if (ACPI_FAILURE(status))
if (!first_ec)
return -ENODEV;
}
/*
* Query the EC to find out which _Qxx method we need to evaluate.
* Note that successful completion of the query causes the ACPI_EC_SCI
* bit to be cleared (and thus clearing the interrupt source).
*/
if (down_interruptible(&ec->poll.sem)) {
result = -ERESTARTSYS;
goto end_nosem;
}
acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY,
&ec->common.command_addr);
result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
if (result)
goto end;
ec = acpi_driver_data(first_ec);
acpi_hw_low_level_read(8, data, &ec->common.data_addr);
if (!*data)
result = -ENODATA;
return acpi_ec_transaction(ec, command, wdata,
wdata_len, rdata, rdata_len);
}
end:
up(&ec->poll.sem);
end_nosem:
if (ec->common.global_lock)
acpi_release_global_lock(glk);
EXPORT_SYMBOL(ec_transaction);
return result;
}
static int acpi_ec_intr_query(union acpi_ec *ec, u32 * data)
static int acpi_ec_query(struct acpi_ec *ec, u8 *data)
{
int status = 0;
u32 glk;
int result;
u8 d;
if (!ec || !data)
return -EINVAL;
*data = 0;
if (ec->common.global_lock) {
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
if (ACPI_FAILURE(status))
return -ENODEV;
}
down(&ec->intr.sem);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
if (status) {
printk(KERN_DEBUG PREFIX "query EC, IB not empty\n");
goto end;
}
/*
* Query the EC to find out which _Qxx method we need to evaluate.
* Note that successful completion of the query causes the ACPI_EC_SCI
* bit to be cleared (and thus clearing the interrupt source).
*/
acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY,
&ec->common.command_addr);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
if (status) {
printk(KERN_DEBUG PREFIX "query EC, OB not full\n");
goto end;
}
acpi_hw_low_level_read(8, data, &ec->common.data_addr);
if (!*data)
status = -ENODATA;
end:
up(&ec->intr.sem);
result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1);
if (result)
return result;
if (ec->common.global_lock)
acpi_release_global_lock(glk);
if (!d)
return -ENODATA;
return status;
*data = d;
return 0;
}
/* --------------------------------------------------------------------------
Event Management
-------------------------------------------------------------------------- */
union acpi_ec_query_data {
struct acpi_ec_query_data {
acpi_handle handle;
u8 data;
};
static void acpi_ec_gpe_query(void *ec_cxt)
{
if (acpi_ec_poll_mode)
acpi_ec_gpe_poll_query(ec_cxt);
else
acpi_ec_gpe_intr_query(ec_cxt);
}
static void acpi_ec_gpe_poll_query(void *ec_cxt)
{
union acpi_ec *ec = (union acpi_ec *)ec_cxt;
u32 value = 0;
static char object_name[5] = { '_', 'Q', '0', '0', '\0' };
const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
};
struct acpi_ec *ec = (struct acpi_ec *)ec_cxt;
u8 value = 0;
static char object_name[8];
if (!ec_cxt)
if (!ec)
goto end;
if (down_interruptible (&ec->poll.sem)) {
return;
}
acpi_hw_low_level_read(8, &value, &ec->common.command_addr);
up(&ec->poll.sem);
/* TBD: Implement asynch events!
* NOTE: All we care about are EC-SCI's. Other EC events are
* handled via polling (yuck!). This is because some systems
* treat EC-SCIs as level (versus EDGE!) triggered, preventing
* a purely interrupt-driven approach (grumble, grumble).
*/
value = acpi_ec_read_status(ec);
if (!(value & ACPI_EC_FLAG_SCI))
goto end;
if (acpi_ec_query(ec, &value))
goto end;
object_name[2] = hex[((value >> 4) & 0x0F)];
object_name[3] = hex[(value & 0x0F)];
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name));
acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL);
snprintf(object_name, 8, "_Q%2.2X", value);
end:
acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
}
static void acpi_ec_gpe_intr_query(void *ec_cxt)
{
union acpi_ec *ec = (union acpi_ec *)ec_cxt;
u32 value;
int result = -ENODATA;
static char object_name[5] = { '_', 'Q', '0', '0', '\0' };
const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
};
if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI)
result = acpi_ec_query(ec, &value);
if (result)
goto end;
object_name[2] = hex[((value >> 4) & 0x0F)];
object_name[3] = hex[(value & 0x0F)];
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s", object_name));
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name));
acpi_evaluate_object(ec->handle, object_name, NULL, NULL);
acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL);
end:
atomic_dec(&ec->intr.pending_gpe);
return;
acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR);
}
static u32 acpi_ec_gpe_handler(void *data)
{
if (acpi_ec_poll_mode)
return acpi_ec_gpe_poll_handler(data);
else
return acpi_ec_gpe_intr_handler(data);
}
static u32 acpi_ec_gpe_poll_handler(void *data)
{
acpi_status status = AE_OK;
union acpi_ec *ec = (union acpi_ec *)data;
u8 value;
struct acpi_ec *ec = (struct acpi_ec *)data;
if (!ec)
return ACPI_INTERRUPT_NOT_HANDLED;
acpi_disable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
status = acpi_os_execute(OSL_EC_POLL_HANDLER, acpi_ec_gpe_query, ec);
if (status == AE_OK)
return ACPI_INTERRUPT_HANDLED;
else
return ACPI_INTERRUPT_NOT_HANDLED;
}
static u32 acpi_ec_gpe_intr_handler(void *data)
{
acpi_status status = AE_OK;
u32 value;
union acpi_ec *ec = (union acpi_ec *)data;
if (!ec)
return ACPI_INTERRUPT_NOT_HANDLED;
acpi_clear_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
acpi_clear_gpe(NULL, ec->gpe_bit, ACPI_ISR);
value = acpi_ec_read_status(ec);
switch (ec->intr.expect_event) {
case ACPI_EC_EVENT_OBF:
if (!(value & ACPI_EC_FLAG_OBF))
break;
ec->intr.expect_event = 0;
wake_up(&ec->intr.wait);
break;
case ACPI_EC_EVENT_IBE:
if ((value & ACPI_EC_FLAG_IBF))
break;
ec->intr.expect_event = 0;
wake_up(&ec->intr.wait);
break;
default:
break;
if (acpi_ec_mode == EC_INTR) {
if (acpi_ec_check_status(value, ec->expect_event)) {
ec->expect_event = 0;
wake_up(&ec->wait);
}
}
if (value & ACPI_EC_FLAG_SCI) {
atomic_add(1, &ec->intr.pending_gpe);
status = acpi_os_execute(OSL_EC_BURST_HANDLER,
acpi_ec_gpe_query, ec);
status = acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec);
return status == AE_OK ?
ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
}
acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_ISR);
return status == AE_OK ?
ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
}
......@@ -833,7 +499,7 @@ acpi_ec_space_handler(u32 function,
void *handler_context, void *region_context)
{
int result = 0;
union acpi_ec *ec = NULL;
struct acpi_ec *ec = NULL;
u64 temp = *value;
acpi_integer f_v = 0;
int i = 0;
......@@ -843,18 +509,16 @@ acpi_ec_space_handler(u32 function,
return AE_BAD_PARAMETER;
if (bit_width != 8 && acpi_strict) {
printk(KERN_WARNING PREFIX
"acpi_ec_space_handler: bit_width should be 8\n");
return AE_BAD_PARAMETER;
}
ec = (union acpi_ec *)handler_context;
ec = (struct acpi_ec *)handler_context;
next_byte:
switch (function) {
case ACPI_READ:
temp = 0;
result = acpi_ec_read(ec, (u8) address, (u32 *) & temp);
result = acpi_ec_read(ec, (u8) address, (u8 *) &temp);
break;
case ACPI_WRITE:
result = acpi_ec_write(ec, (u8) address, (u8) temp);
......@@ -905,20 +569,20 @@ static struct proc_dir_entry *acpi_ec_dir;
static int acpi_ec_read_info(struct seq_file *seq, void *offset)
{
union acpi_ec *ec = (union acpi_ec *)seq->private;
struct acpi_ec *ec = (struct acpi_ec *)seq->private;
if (!ec)
goto end;
seq_printf(seq, "gpe bit: 0x%02x\n",
(u32) ec->common.gpe_bit);
(u32) ec->gpe_bit);
seq_printf(seq, "ports: 0x%02x, 0x%02x\n",
(u32) ec->common.status_addr.address,
(u32) ec->common.data_addr.address);
(u32) ec->command_addr,
(u32) ec->data_addr);
seq_printf(seq, "use global lock: %s\n",
ec->common.global_lock ? "yes" : "no");
acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
ec->global_lock ? "yes" : "no");
acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR);
end:
return 0;
......@@ -929,7 +593,7 @@ static int acpi_ec_info_open_fs(struct inode *inode, struct file *file)
return single_open(file, acpi_ec_read_info, PDE(inode)->data);
}
static const struct file_operations acpi_ec_info_ops = {
static struct file_operations acpi_ec_info_ops = {
.open = acpi_ec_info_open_fs,
.read = seq_read,
.llseek = seq_lseek,
......@@ -978,101 +642,35 @@ static int acpi_ec_remove_fs(struct acpi_device *device)
Driver Interface
-------------------------------------------------------------------------- */
static int acpi_ec_poll_add(struct acpi_device *device)
static int acpi_ec_add(struct acpi_device *device)
{
int result = 0;
acpi_status status = AE_OK;
union acpi_ec *ec = NULL;
struct acpi_ec *ec = NULL;
if (!device)
return -EINVAL;
ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
if (!ec)
return -ENOMEM;
memset(ec, 0, sizeof(union acpi_ec));
ec->common.handle = device->handle;
ec->common.uid = -1;
init_MUTEX(&ec->poll.sem);
strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_EC_CLASS);
acpi_driver_data(device) = ec;
/* Use the global lock for all EC transactions? */
acpi_evaluate_integer(ec->common.handle, "_GLK", NULL,
&ec->common.global_lock);
/* XXX we don't test uids, because on some boxes ecdt uid = 0, see:
http://bugzilla.kernel.org/show_bug.cgi?id=6111 */
if (ec_ecdt) {
acpi_remove_address_space_handler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_EC,
&acpi_ec_space_handler);
acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
&acpi_ec_gpe_handler);
kfree(ec_ecdt);
memset(ec, 0, sizeof(struct acpi_ec));
ec->handle = device->handle;
ec->uid = -1;
init_MUTEX(&ec->sem);
if (acpi_ec_mode == EC_INTR) {
atomic_set(&ec->leaving_burst, 1);
init_waitqueue_head(&ec->wait);
}
/* Get GPE bit assignment (EC events). */
/* TODO: Add support for _GPE returning a package */
status =
acpi_evaluate_integer(ec->common.handle, "_GPE", NULL,
&ec->common.gpe_bit);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Obtaining GPE bit"));
result = -ENODEV;
goto end;
}
result = acpi_ec_add_fs(device);
if (result)
goto end;
printk(KERN_INFO PREFIX "%s [%s] (gpe %d) polling mode.\n",
acpi_device_name(device), acpi_device_bid(device),
(u32) ec->common.gpe_bit);
if (!first_ec)
first_ec = device;
end:
if (result)
kfree(ec);
return result;
}
static int acpi_ec_intr_add(struct acpi_device *device)
{
int result = 0;
acpi_status status = AE_OK;
union acpi_ec *ec = NULL;
if (!device)
return -EINVAL;
ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
if (!ec)
return -ENOMEM;
memset(ec, 0, sizeof(union acpi_ec));
ec->common.handle = device->handle;
ec->common.uid = -1;
atomic_set(&ec->intr.pending_gpe, 0);
atomic_set(&ec->intr.leaving_burst, 1);
init_MUTEX(&ec->intr.sem);
init_waitqueue_head(&ec->intr.wait);
strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_EC_CLASS);
acpi_driver_data(device) = ec;
/* Use the global lock for all EC transactions? */
acpi_evaluate_integer(ec->common.handle, "_GLK", NULL,
&ec->common.global_lock);
acpi_evaluate_integer(ec->handle, "_GLK", NULL,
&ec->global_lock);
/* XXX we don't test uids, because on some boxes ecdt uid = 0, see:
http://bugzilla.kernel.org/show_bug.cgi?id=6111 */
......@@ -1081,7 +679,7 @@ static int acpi_ec_intr_add(struct acpi_device *device)
ACPI_ADR_SPACE_EC,
&acpi_ec_space_handler);
acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
acpi_remove_gpe_handler(NULL, ec_ecdt->gpe_bit,
&acpi_ec_gpe_handler);
kfree(ec_ecdt);
......@@ -1090,10 +688,10 @@ static int acpi_ec_intr_add(struct acpi_device *device)
/* Get GPE bit assignment (EC events). */
/* TODO: Add support for _GPE returning a package */
status =
acpi_evaluate_integer(ec->common.handle, "_GPE", NULL,
&ec->common.gpe_bit);
acpi_evaluate_integer(ec->handle, "_GPE", NULL,
&ec->gpe_bit);
if (ACPI_FAILURE(status)) {
printk(KERN_ERR PREFIX "Obtaining GPE bit assignment\n");
ACPI_EXCEPTION((AE_INFO, status, "Obtaining GPE bit assignment"));
result = -ENODEV;
goto end;
}
......@@ -1102,9 +700,9 @@ static int acpi_ec_intr_add(struct acpi_device *device)
if (result)
goto end;
printk(KERN_INFO PREFIX "%s [%s] (gpe %d) interrupt mode.\n",
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s [%s] (gpe %d) interrupt mode.",
acpi_device_name(device), acpi_device_bid(device),
(u32) ec->common.gpe_bit);
(u32) ec->gpe_bit));
if (!first_ec)
first_ec = device;
......@@ -1118,7 +716,7 @@ static int acpi_ec_intr_add(struct acpi_device *device)
static int acpi_ec_remove(struct acpi_device *device, int type)
{
union acpi_ec *ec = NULL;
struct acpi_ec *ec = NULL;
if (!device)
......@@ -1136,8 +734,7 @@ static int acpi_ec_remove(struct acpi_device *device, int type)
static acpi_status
acpi_ec_io_ports(struct acpi_resource *resource, void *context)
{
union acpi_ec *ec = (union acpi_ec *)context;
struct acpi_generic_address *addr;
struct acpi_ec *ec = (struct acpi_ec *)context;
if (resource->type != ACPI_RESOURCE_TYPE_IO) {
return AE_OK;
......@@ -1148,26 +745,21 @@ acpi_ec_io_ports(struct acpi_resource *resource, void *context)
* the second address region returned is the status/command
* port.
*/
if (ec->common.data_addr.register_bit_width == 0) {
addr = &ec->common.data_addr;
} else if (ec->common.command_addr.register_bit_width == 0) {
addr = &ec->common.command_addr;
if (ec->data_addr == 0) {
ec->data_addr = resource->data.io.minimum;
} else if (ec->command_addr == 0) {
ec->command_addr = resource->data.io.minimum;
} else {
return AE_CTRL_TERMINATE;
}
addr->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO;
addr->register_bit_width = 8;
addr->register_bit_offset = 0;
addr->address = resource->data.io.minimum;
return AE_OK;
}
static int acpi_ec_start(struct acpi_device *device)
{
acpi_status status = AE_OK;
union acpi_ec *ec = NULL;
struct acpi_ec *ec = NULL;
if (!device)
......@@ -1181,39 +773,35 @@ static int acpi_ec_start(struct acpi_device *device)
/*
* Get I/O port addresses. Convert to GAS format.
*/
status = acpi_walk_resources(ec->common.handle, METHOD_NAME__CRS,
status = acpi_walk_resources(ec->handle, METHOD_NAME__CRS,
acpi_ec_io_ports, ec);
if (ACPI_FAILURE(status)
|| ec->common.command_addr.register_bit_width == 0) {
printk(KERN_ERR PREFIX "Error getting I/O port addresses\n");
if (ACPI_FAILURE(status) || ec->command_addr == 0) {
ACPI_EXCEPTION((AE_INFO, status,
"Error getting I/O port addresses"));
return -ENODEV;
}
ec->common.status_addr = ec->common.command_addr;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x\n",
(u32) ec->common.gpe_bit,
(u32) ec->common.command_addr.address,
(u32) ec->common.data_addr.address));
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02lx, ports=0x%2lx,0x%2lx",
ec->gpe_bit, ec->command_addr, ec->data_addr));
/*
* Install GPE handler
*/
status = acpi_install_gpe_handler(NULL, ec->common.gpe_bit,
status = acpi_install_gpe_handler(NULL, ec->gpe_bit,
ACPI_GPE_EDGE_TRIGGERED,
&acpi_ec_gpe_handler, ec);
if (ACPI_FAILURE(status)) {
return -ENODEV;
}
acpi_set_gpe_type(NULL, ec->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME);
acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
acpi_set_gpe_type(NULL, ec->gpe_bit, ACPI_GPE_TYPE_RUNTIME);
acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR);
status = acpi_install_address_space_handler(ec->common.handle,
status = acpi_install_address_space_handler(ec->handle,
ACPI_ADR_SPACE_EC,
&acpi_ec_space_handler,
&acpi_ec_space_setup, ec);
if (ACPI_FAILURE(status)) {
acpi_remove_gpe_handler(NULL, ec->common.gpe_bit,
acpi_remove_gpe_handler(NULL, ec->gpe_bit,
&acpi_ec_gpe_handler);
return -ENODEV;
}
......@@ -1224,7 +812,7 @@ static int acpi_ec_start(struct acpi_device *device)
static int acpi_ec_stop(struct acpi_device *device, int type)
{
acpi_status status = AE_OK;
union acpi_ec *ec = NULL;
struct acpi_ec *ec = NULL;
if (!device)
......@@ -1232,14 +820,14 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
ec = acpi_driver_data(device);
status = acpi_remove_address_space_handler(ec->common.handle,
status = acpi_remove_address_space_handler(ec->handle,
ACPI_ADR_SPACE_EC,
&acpi_ec_space_handler);
if (ACPI_FAILURE(status))
return -ENODEV;
status =
acpi_remove_gpe_handler(NULL, ec->common.gpe_bit,
acpi_remove_gpe_handler(NULL, ec->gpe_bit,
&acpi_ec_gpe_handler);
if (ACPI_FAILURE(status))
return -ENODEV;
......@@ -1251,76 +839,30 @@ static acpi_status __init
acpi_fake_ecdt_callback(acpi_handle handle,
u32 Level, void *context, void **retval)
{
if (acpi_ec_poll_mode)
return acpi_fake_ecdt_poll_callback(handle,
Level, context, retval);
else
return acpi_fake_ecdt_intr_callback(handle,
Level, context, retval);
}
static acpi_status __init
acpi_fake_ecdt_poll_callback(acpi_handle handle,
u32 Level, void *context, void **retval)
{
acpi_status status;
init_MUTEX(&ec_ecdt->sem);
if (acpi_ec_mode == EC_INTR) {
init_waitqueue_head(&ec_ecdt->wait);
}
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
acpi_ec_io_ports, ec_ecdt);
if (ACPI_FAILURE(status))
return status;
ec_ecdt->common.status_addr = ec_ecdt->common.command_addr;
ec_ecdt->common.uid = -1;
acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid);
status =
acpi_evaluate_integer(handle, "_GPE", NULL,
&ec_ecdt->common.gpe_bit);
if (ACPI_FAILURE(status))
return status;
init_MUTEX(&ec_ecdt->poll.sem);
ec_ecdt->common.global_lock = TRUE;
ec_ecdt->common.handle = handle;
printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n",
(u32) ec_ecdt->common.gpe_bit,
(u32) ec_ecdt->common.command_addr.address,
(u32) ec_ecdt->common.data_addr.address);
return AE_CTRL_TERMINATE;
}
static acpi_status __init
acpi_fake_ecdt_intr_callback(acpi_handle handle,
u32 Level, void *context, void **retval)
{
acpi_status status;
init_MUTEX(&ec_ecdt->intr.sem);
init_waitqueue_head(&ec_ecdt->intr.wait);
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
acpi_ec_io_ports, ec_ecdt);
if (ACPI_FAILURE(status))
return status;
ec_ecdt->common.status_addr = ec_ecdt->common.command_addr;
ec_ecdt->common.uid = -1;
acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid);
ec_ecdt->uid = -1;
acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid);
status =
acpi_evaluate_integer(handle, "_GPE", NULL,
&ec_ecdt->common.gpe_bit);
&ec_ecdt->gpe_bit);
if (ACPI_FAILURE(status))
return status;
ec_ecdt->common.global_lock = TRUE;
ec_ecdt->common.handle = handle;
ec_ecdt->global_lock = TRUE;
ec_ecdt->handle = handle;
printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n",
(u32) ec_ecdt->common.gpe_bit,
(u32) ec_ecdt->common.command_addr.address,
(u32) ec_ecdt->common.data_addr.address);
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02lx, ports=0x%2lx, 0x%2lx",
ec_ecdt->gpe_bit, ec_ecdt->command_addr, ec_ecdt->data_addr));
return AE_CTRL_TERMINATE;
}
......@@ -1340,14 +882,14 @@ static int __init acpi_ec_fake_ecdt(void)
acpi_status status;
int ret = 0;
printk(KERN_INFO PREFIX "Try to make an fake ECDT\n");
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Try to make an fake ECDT"));
ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
ec_ecdt = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
if (!ec_ecdt) {
ret = -ENOMEM;
goto error;
}
memset(ec_ecdt, 0, sizeof(union acpi_ec));
memset(ec_ecdt, 0, sizeof(struct acpi_ec));
status = acpi_get_devices(ACPI_EC_HID,
acpi_fake_ecdt_callback, NULL, NULL);
......@@ -1355,23 +897,15 @@ static int __init acpi_ec_fake_ecdt(void)
kfree(ec_ecdt);
ec_ecdt = NULL;
ret = -ENODEV;
ACPI_EXCEPTION((AE_INFO, status, "Can't make an fake ECDT"));
goto error;
}
return 0;
error:
printk(KERN_ERR PREFIX "Can't make an fake ECDT\n");
return ret;
}
static int __init acpi_ec_get_real_ecdt(void)
{
if (acpi_ec_poll_mode)
return acpi_ec_poll_get_real_ecdt();
else
return acpi_ec_intr_get_real_ecdt();
}
static int __init acpi_ec_poll_get_real_ecdt(void)
{
acpi_status status;
struct acpi_table_ecdt *ecdt_ptr;
......@@ -1382,80 +916,36 @@ static int __init acpi_ec_poll_get_real_ecdt(void)
if (ACPI_FAILURE(status))
return -ENODEV;
printk(KERN_INFO PREFIX "Found ECDT\n");
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found ECDT"));
/*
* Generate a temporary ec context to use until the namespace is scanned
*/
ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
ec_ecdt = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
if (!ec_ecdt)
return -ENOMEM;
memset(ec_ecdt, 0, sizeof(union acpi_ec));
ec_ecdt->common.command_addr = ecdt_ptr->ec_control;
ec_ecdt->common.status_addr = ecdt_ptr->ec_control;
ec_ecdt->common.data_addr = ecdt_ptr->ec_data;
ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit;
init_MUTEX(&ec_ecdt->poll.sem);
/* use the GL just to be safe */
ec_ecdt->common.global_lock = TRUE;
ec_ecdt->common.uid = ecdt_ptr->uid;
memset(ec_ecdt, 0, sizeof(struct acpi_ec));
status =
acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle);
if (ACPI_FAILURE(status)) {
goto error;
init_MUTEX(&ec_ecdt->sem);
if (acpi_ec_mode == EC_INTR) {
init_waitqueue_head(&ec_ecdt->wait);
}
return 0;
error:
printk(KERN_ERR PREFIX "Could not use ECDT\n");
kfree(ec_ecdt);
ec_ecdt = NULL;
return -ENODEV;
}
static int __init acpi_ec_intr_get_real_ecdt(void)
{
acpi_status status;
struct acpi_table_ecdt *ecdt_ptr;
status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING,
(struct acpi_table_header **)
&ecdt_ptr);
if (ACPI_FAILURE(status))
return -ENODEV;
printk(KERN_INFO PREFIX "Found ECDT\n");
/*
* Generate a temporary ec context to use until the namespace is scanned
*/
ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
if (!ec_ecdt)
return -ENOMEM;
memset(ec_ecdt, 0, sizeof(union acpi_ec));
init_MUTEX(&ec_ecdt->intr.sem);
init_waitqueue_head(&ec_ecdt->intr.wait);
ec_ecdt->common.command_addr = ecdt_ptr->ec_control;
ec_ecdt->common.status_addr = ecdt_ptr->ec_control;
ec_ecdt->common.data_addr = ecdt_ptr->ec_data;
ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit;
ec_ecdt->command_addr = ecdt_ptr->ec_control.address;
ec_ecdt->data_addr = ecdt_ptr->ec_data.address;
ec_ecdt->gpe_bit = ecdt_ptr->gpe_bit;
/* use the GL just to be safe */
ec_ecdt->common.global_lock = TRUE;
ec_ecdt->common.uid = ecdt_ptr->uid;
ec_ecdt->global_lock = TRUE;
ec_ecdt->uid = ecdt_ptr->uid;
status =
acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle);
acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->handle);
if (ACPI_FAILURE(status)) {
goto error;
}
return 0;
error:
printk(KERN_ERR PREFIX "Could not use ECDT\n");
ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT"));
kfree(ec_ecdt);
ec_ecdt = NULL;
......@@ -1480,14 +970,14 @@ int __init acpi_ec_ecdt_probe(void)
/*
* Install GPE handler
*/
status = acpi_install_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
status = acpi_install_gpe_handler(NULL, ec_ecdt->gpe_bit,
ACPI_GPE_EDGE_TRIGGERED,
&acpi_ec_gpe_handler, ec_ecdt);
if (ACPI_FAILURE(status)) {
goto error;
}
acpi_set_gpe_type(NULL, ec_ecdt->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME);
acpi_enable_gpe(NULL, ec_ecdt->common.gpe_bit, ACPI_NOT_ISR);
acpi_set_gpe_type(NULL, ec_ecdt->gpe_bit, ACPI_GPE_TYPE_RUNTIME);
acpi_enable_gpe(NULL, ec_ecdt->gpe_bit, ACPI_NOT_ISR);
status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_EC,
......@@ -1495,7 +985,7 @@ int __init acpi_ec_ecdt_probe(void)
&acpi_ec_space_setup,
ec_ecdt);
if (ACPI_FAILURE(status)) {
acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
acpi_remove_gpe_handler(NULL, ec_ecdt->gpe_bit,
&acpi_ec_gpe_handler);
goto error;
}
......@@ -1503,7 +993,7 @@ int __init acpi_ec_ecdt_probe(void)
return 0;
error:
printk(KERN_ERR PREFIX "Could not use ECDT\n");
ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT"));
kfree(ec_ecdt);
ec_ecdt = NULL;
......@@ -1562,13 +1052,13 @@ static int __init acpi_ec_set_intr_mode(char *str)
return 0;
if (intr) {
acpi_ec_poll_mode = EC_INTR;
acpi_ec_driver.ops.add = acpi_ec_intr_add;
acpi_ec_mode = EC_INTR;
} else {
acpi_ec_poll_mode = EC_POLL;
acpi_ec_driver.ops.add = acpi_ec_poll_add;
acpi_ec_mode = EC_POLL;
}
printk(KERN_INFO PREFIX "EC %s mode.\n", intr ? "interrupt" : "polling");
acpi_ec_driver.ops.add = acpi_ec_add;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "EC %s mode.\n", intr ? "interrupt" : "polling"));
return 1;
}
......
include/linux/acpi.h
View file @ ed3269a3
......@@ -494,6 +494,9 @@ void acpi_pci_unregister_driver(struct acpi_pci_driver *driver);
extern int ec_read(u8 addr, u8 *val);
extern int ec_write(u8 addr, u8 val);
extern int ec_transaction(u8 command,
const u8 *wdata, unsigned wdata_len,
u8 *rdata, unsigned rdata_len);
#endif /*CONFIG_ACPI_EC*/
......
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