enum {
EC_INTR = 1, /* Output buffer full */
- EC_POLL, /* Input buffer empty */
+ EC_POLL, /* Input buffer empty */
};
static int acpi_ec_remove(struct acpi_device *device, int type);
.stop = acpi_ec_stop,
},
};
+
+/* 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 */
wait_queue_head_t wait;
-};
-
-/* If we find an EC via the ECDT, we need to keep a ptr to its context */
-static struct acpi_ec *ec_ecdt;
+} *ec_ecdt;
/* External interfaces use first EC only, so remember */
static struct acpi_device *first_ec;
static int acpi_ec_mode = EC_INTR;
-static int acpi_ec_poll_transaction(struct acpi_ec *ec, u8 command,
- const u8 *wdata, unsigned wdata_len,
- u8 *rdata, unsigned rdata_len);
-static int acpi_ec_intr_transaction(struct acpi_ec *ec, u8 command,
- const u8 *wdata, unsigned wdata_len,
- u8 *rdata, unsigned rdata_len);
-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);
-
/* --------------------------------------------------------------------------
Transaction Management
-------------------------------------------------------------------------- */
-static u32 acpi_ec_read_status(struct 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->status_addr);
- return status;
+ return inb(ec->command_addr);
}
-static u32 acpi_ec_read_data(struct acpi_ec *ec)
+static inline u8 acpi_ec_read_data(struct acpi_ec *ec)
{
- u32 data = 0;
-
- acpi_hw_low_level_read(8, &data, &ec->data_addr);
- return data;
+ return inb(ec->data_addr);
}
-static void acpi_ec_write_cmd(struct acpi_ec *ec, u32 command)
+static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command)
{
- acpi_hw_low_level_write(8, command, &ec->command_addr);
+ outb(command, ec->command_addr);
}
-static void acpi_ec_write_data(struct acpi_ec *ec, u32 data)
+static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
{
- acpi_hw_low_level_write(8, data, &ec->data_addr);
+ outb(data, ec->data_addr);
}
-static int acpi_ec_check_status(u32 status, u8 event) {
-
+static int acpi_ec_check_status(u8 status, u8 event)
+{
switch (event) {
case ACPI_EC_EVENT_OBF_1:
if (status & ACPI_EC_FLAG_OBF)
*/
int acpi_ec_enter_burst_mode(struct acpi_ec *ec)
{
- u32 tmp = 0;
- u32 status = 0;
+ u8 tmp = 0;
+ u8 status = 0;
status = acpi_ec_read_status(ec);
int acpi_ec_leave_burst_mode(struct acpi_ec *ec)
{
- u32 status = 0;
+ u8 status = 0;
status = acpi_ec_read_status(ec);
}
#endif /* ACPI_FUTURE_USAGE */
-static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
- const u8 *wdata, unsigned wdata_len,
- u8 *rdata, unsigned rdata_len)
-{
- if (acpi_ec_mode == EC_POLL)
- return acpi_ec_poll_transaction(ec, command, wdata, wdata_len, rdata, rdata_len);
- else
- return acpi_ec_intr_transaction(ec, command, wdata, wdata_len, rdata, rdata_len);
-}
-static int acpi_ec_read(struct acpi_ec *ec, u8 address, u32 * data)
-{
- int result;
- u8 d;
- result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ, &address, 1, &d, 1);
- *data = d;
- return result;
-}
-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);
-}
-
static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
- const u8 *wdata, unsigned wdata_len,
- u8 *rdata, unsigned rdata_len)
+ const u8 *wdata, unsigned wdata_len,
+ u8 *rdata, unsigned rdata_len)
{
int result;
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
if (result)
return result;
-
acpi_ec_write_data(ec, *(wdata++));
- }
+ }
if (command == ACPI_EC_COMMAND_WRITE) {
result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
}
for (; rdata_len > 0; rdata_len --) {
- u32 d;
-
result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1);
if (result)
return result;
- d = acpi_ec_read_data(ec);
- *(rdata++) = (u8) d;
+ *(rdata++) = acpi_ec_read_data(ec);
}
return 0;
}
-static int acpi_ec_poll_transaction(struct acpi_ec *ec, u8 command,
- const u8 *wdata, unsigned wdata_len,
- u8 *rdata, unsigned rdata_len)
-{
- acpi_status status = AE_OK;
- int result;
- u32 glk = 0;
-
- if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata))
- return -EINVAL;
-
- if (rdata)
- memset(rdata, 0, rdata_len);
-
- if (ec->global_lock) {
- status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
- if (ACPI_FAILURE(status))
- return -ENODEV;
- }
-
- if (down_interruptible(&ec->sem)) {
- result = -ERESTARTSYS;
- goto end_nosem;
- }
-
- result = acpi_ec_transaction_unlocked(ec, command,
- wdata, wdata_len,
- rdata, rdata_len);
- up(&ec->sem);
-
-end_nosem:
- if (ec->global_lock)
- acpi_release_global_lock(glk);
-
- return result;
-}
-
-static int acpi_ec_intr_transaction(struct acpi_ec *ec, u8 command,
- const u8 *wdata, unsigned wdata_len,
- u8 *rdata, unsigned rdata_len)
+static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
+ const u8 *wdata, unsigned wdata_len,
+ u8 *rdata, unsigned rdata_len)
{
int status;
u32 glk;
if (ACPI_FAILURE(status))
return -ENODEV;
}
-
- WARN_ON(in_interrupt());
down(&ec->sem);
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
if (status) {
- ACPI_EXCEPTION((AE_INFO, status, "read EC, IB not empty"));
+ printk(KERN_DEBUG PREFIX "read EC, IB not empty\n");
goto end;
}
return status;
}
+static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 *data)
+{
+ int result;
+ u8 d;
+
+ result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ,
+ &address, 1, &d, 1);
+ *data = d;
+ return result;
+}
+
+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)
{
struct acpi_ec *ec;
int err;
- u32 temp_data;
+ u8 temp_data;
if (!first_ec)
return -ENODEV;
ec = acpi_driver_data(first_ec);
- return acpi_ec_transaction(ec, command, wdata, wdata_len, rdata, rdata_len);
+ return acpi_ec_transaction(ec, command, wdata,
+ wdata_len, rdata, rdata_len);
}
EXPORT_SYMBOL(ec_transaction);
-static int acpi_ec_query(struct acpi_ec *ec, u32 * data) {
- int result;
+static int acpi_ec_query(struct acpi_ec *ec, u8 *data)
+{
+ int result;
u8 d;
if (!ec || !data)
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_mode == EC_POLL)
- 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)
{
struct acpi_ec *ec = (struct 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'
- };
-
+ u8 value = 0;
+ static char object_name[8];
- if (!ec_cxt)
+ if (!ec)
goto end;
- if (down_interruptible (&ec->sem)) {
- return;
- }
value = acpi_ec_read_status(ec);
- up(&ec->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).
- */
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)];
+ snprintf(object_name, 8, "_Q%2.2X", value);
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name));
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s", object_name));
acpi_evaluate_object(ec->handle, object_name, NULL, NULL);
end:
acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR);
}
-static void acpi_ec_gpe_intr_query(void *ec_cxt)
-{
- struct acpi_ec *ec = (struct 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\n", object_name));
-
- acpi_evaluate_object(ec->handle, object_name, NULL, NULL);
- end:
- return;
-}
static u32 acpi_ec_gpe_handler(void *data)
-{
- if (acpi_ec_mode == EC_POLL)
- 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;
+ u8 value;
struct acpi_ec *ec = (struct acpi_ec *)data;
- if (!ec)
- return ACPI_INTERRUPT_NOT_HANDLED;
-
- acpi_disable_gpe(NULL, ec->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;
- struct acpi_ec *ec = (struct acpi_ec *)data;
-
- if (!ec)
- return ACPI_INTERRUPT_NOT_HANDLED;
-
acpi_clear_gpe(NULL, ec->gpe_bit, ACPI_ISR);
value = acpi_ec_read_status(ec);
- switch (ec->expect_event) {
- case ACPI_EC_EVENT_OBF_1:
- if (!(value & ACPI_EC_FLAG_OBF))
- break;
- ec->expect_event = 0;
- wake_up(&ec->wait);
- break;
- case ACPI_EC_EVENT_IBF_0:
- if ((value & ACPI_EC_FLAG_IBF))
- break;
- ec->expect_event = 0;
- wake_up(&ec->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) {
- 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;
}
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);
seq_printf(seq, "gpe bit: 0x%02x\n",
(u32) ec->gpe_bit);
seq_printf(seq, "ports: 0x%02x, 0x%02x\n",
- (u32) ec->status_addr.address,
- (u32) ec->data_addr.address);
+ (u32) ec->command_addr,
+ (u32) ec->data_addr);
seq_printf(seq, "use global lock: %s\n",
ec->global_lock ? "yes" : "no");
acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR);
acpi_ec_io_ports(struct acpi_resource *resource, void *context)
{
struct acpi_ec *ec = (struct acpi_ec *)context;
- struct acpi_generic_address *addr;
if (resource->type != ACPI_RESOURCE_TYPE_IO) {
return AE_OK;
* the second address region returned is the status/command
* port.
*/
- if (ec->data_addr.register_bit_width == 0) {
- addr = &ec->data_addr;
- } else if (ec->command_addr.register_bit_width == 0) {
- addr = &ec->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;
}
*/
status = acpi_walk_resources(ec->handle, METHOD_NAME__CRS,
acpi_ec_io_ports, ec);
- if (ACPI_FAILURE(status)
- || ec->command_addr.register_bit_width == 0) {
+ if (ACPI_FAILURE(status) || ec->command_addr == 0) {
ACPI_EXCEPTION((AE_INFO, status,
"Error getting I/O port addresses"));
return -ENODEV;
}
- ec->status_addr = ec->command_addr;
-
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x",
- (u32) ec->gpe_bit,
- (u32) ec->command_addr.address,
- (u32) ec->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
acpi_ec_io_ports, ec_ecdt);
if (ACPI_FAILURE(status))
return status;
- ec_ecdt->status_addr = ec_ecdt->command_addr;
ec_ecdt->uid = -1;
acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid);
ec_ecdt->global_lock = TRUE;
ec_ecdt->handle = handle;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02x, ports=0x%2x, 0x%2x",
- (u32) ec_ecdt->gpe_bit,
- (u32) ec_ecdt->command_addr.address,
- (u32) ec_ecdt->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;
}
if (acpi_ec_mode == EC_INTR) {
init_waitqueue_head(&ec_ecdt->wait);
}
- ec_ecdt->command_addr = ecdt_ptr->ec_control;
- ec_ecdt->status_addr = ecdt_ptr->ec_control;
- ec_ecdt->data_addr = ecdt_ptr->ec_data;
+ 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->global_lock = TRUE;
projects / linux-2.6 / blobdiff