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linux-davinci-2.6.23
Commit 6ffb221a authored by Denis M. Sadykov's avatar Denis M. Sadykov Committed by Len Brown
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ACPI: EC: Simplify acpi_hw_low_level*() with inb()/outb(). 

Simplify acpi_hw_low_level_xxx() functions to inb() and outb().
Signed-off-by: default avatarAlexey Y. Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 8e0341ba
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Showing with 45 additions and 79 deletions
drivers/acpi/ec.c
View file @ 6ffb221a
......@@ -91,22 +91,20 @@ static struct acpi_driver acpi_ec_driver = {
.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;
......@@ -116,34 +114,28 @@ static int acpi_ec_mode = EC_INTR;
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)
......@@ -201,8 +193,8 @@ static int acpi_ec_wait(struct acpi_ec *ec, u8 event)
*/
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);
......@@ -227,7 +219,7 @@ int acpi_ec_enter_burst_mode(struct acpi_ec *ec)
int acpi_ec_leave_burst_mode(struct acpi_ec *ec)
{
u32 status = 0;
u8 status = 0;
status = acpi_ec_read_status(ec);
......@@ -268,14 +260,11 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
}
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;
......@@ -320,7 +309,7 @@ end:
return status;
}
static int acpi_ec_read(struct acpi_ec *ec, u8 address, u32 * data)
static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 *data)
{
int result;
u8 d;
......@@ -330,6 +319,7 @@ static int acpi_ec_read(struct acpi_ec *ec, u8 address, u32 * data)
*data = d;
return result;
}
static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)
{
u8 wdata[2] = { address, data };
......@@ -340,11 +330,11 @@ static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)
/*
* 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;
......@@ -394,7 +384,7 @@ extern int ec_transaction(u8 command,
wdata_len, rdata, rdata_len);
}
static int acpi_ec_query(struct acpi_ec *ec, u32 * data)
static int acpi_ec_query(struct acpi_ec *ec, u8 *data)
{
int result;
u8 d;
......@@ -431,14 +421,10 @@ struct acpi_ec_query_data {
static void acpi_ec_gpe_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;
value = acpi_ec_read_status(ec);
......@@ -449,8 +435,7 @@ static void acpi_ec_gpe_query(void *ec_cxt)
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", object_name));
......@@ -463,8 +448,7 @@ static void acpi_ec_gpe_query(void *ec_cxt)
static u32 acpi_ec_gpe_handler(void *data)
{
acpi_status status = AE_OK;
u32 value;
u8 exec_mode;
u8 value;
struct acpi_ec *ec = (struct acpi_ec *)data;
acpi_clear_gpe(NULL, ec->gpe_bit, ACPI_ISR);
......@@ -475,13 +459,10 @@ static u32 acpi_ec_gpe_handler(void *data)
ec->expect_event = 0;
wake_up(&ec->wait);
}
exec_mode = OSL_EC_BURST_HANDLER;
} else {
exec_mode = OSL_EC_POLL_HANDLER;
}
if (value & ACPI_EC_FLAG_SCI) {
status = acpi_os_execute(exec_mode, 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;
}
......@@ -535,7 +516,7 @@ acpi_ec_space_handler(u32 function,
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);
......@@ -595,8 +576,8 @@ static int acpi_ec_read_info(struct seq_file *seq, void *offset)
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);
......@@ -752,7 +733,6 @@ static acpi_status
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;
......@@ -763,19 +743,14 @@ acpi_ec_io_ports(struct acpi_resource *resource, void *context)
* 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;
}
......@@ -798,19 +773,14 @@ static int acpi_ec_start(struct acpi_device *device)
*/
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
......@@ -877,7 +847,6 @@ acpi_fake_ecdt_callback(acpi_handle handle,
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);
......@@ -890,10 +859,8 @@ acpi_fake_ecdt_callback(acpi_handle handle,
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;
}
......@@ -961,9 +928,8 @@ static int __init acpi_ec_get_real_ecdt(void)
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;
......
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