#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;
- 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;
- 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;
+struct acpi_ec {
+ acpi_handle handle;
+ unsigned long uid;
+ unsigned long gpe_bit;
+ 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;
+} *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;
-
- ec->intr.expect_event = event;
- smp_mb();
+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;
- switch (event) {
- case ACPI_EC_EVENT_IBE:
- if (~acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) {
- ec->intr.expect_event = 0;
- return 0;
- }
- break;
- default:
- break;
+ ec->expect_event = event;
+ if (acpi_ec_check_status(acpi_ec_read_status(ec), event)) {
+ ec->expect_event = 0;
+ return 0;
}
- 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;
+ }
+ }
+ if (acpi_ec_check_status(acpi_ec_read_status(ec), event)) {
+ ec->expect_event = 0;
return 0;
- break;
+ }
+ } while (--i > 0);
- case ACPI_EC_EVENT_IBE:
- if (~acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF)
- return 0;
- break;
- }
+ ec->expect_event = 0;
return -ETIME;
}
* 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");
+ end:
+ 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);
- }
- atomic_set(&ec->intr.leaving_burst, 1);
+ acpi_ec_write_cmd(ec, ACPI_EC_BURST_DISABLE);
+ acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
+ }
+ 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)
-{
- 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)
+static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
+ const u8 *wdata, unsigned wdata_len,
+ u8 *rdata, unsigned rdata_len)
{
- 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;
+ for (; wdata_len > 0; wdata_len --) {
+ result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
+ if (result)
+ return result;
+ acpi_ec_write_data(ec, *(wdata++));
}
- if (down_interruptible(&ec->poll.sem)) {
- result = -ERESTARTSYS;
- goto end_nosem;
+ if (command == ACPI_EC_COMMAND_WRITE) {
+ result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
+ if (result)
+ return result;
}
-
- 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);
- 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;
+ for (; rdata_len > 0; rdata_len --) {
+ result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1);
+ if (result)
+ return result;
- 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;
+ *(rdata++) = acpi_ec_read_data(ec);
}
-
- acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE,
- &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_IBE);
- if (result)
- goto end;
-
- acpi_hw_low_level_write(8, data, &ec->common.data_addr);
- result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
- if (result)
- goto end;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n",
- data, address));
-
- end:
- up(&ec->poll.sem);
-end_nosem:
- if (ec->common.global_lock)
- acpi_release_global_lock(glk);
-
- 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;
-
- 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);
+ int result;
+ u8 d;
- 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;
int ec_write(u8 addr, u8 val)
{
- union acpi_ec *ec;
+ struct acpi_ec *ec;
int err;
if (!first_ec)
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;
-
- *data = 0;
-
- if (ec->common.global_lock) {
- status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
- if (ACPI_FAILURE(status))
- return -ENODEV;
- }
+ struct acpi_ec *ec;
- /*
- * 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;
-
- acpi_hw_low_level_read(8, data, &ec->common.data_addr);
- if (!*data)
- result = -ENODATA;
+ if (!first_ec)
+ return -ENODEV;
- end:
- up(&ec->poll.sem);
-end_nosem:
- if (ec->common.global_lock)
- acpi_release_global_lock(glk);
+ ec = acpi_driver_data(first_ec);
- return result;
+ return acpi_ec_transaction(ec, command, wdata,
+ wdata_len, rdata, rdata_len);
}
-static int acpi_ec_intr_query(union acpi_ec *ec, u32 * data)
-{
- int status = 0;
- u32 glk;
-
- 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;
- }
+EXPORT_SYMBOL(ec_transaction);
- down(&ec->intr.sem);
+static int acpi_ec_query(struct acpi_ec *ec, u8 *data)
+{
+ int result;
+ u8 d;
- 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;
- }
+ if (!ec || !data)
+ return -EINVAL;
- acpi_hw_low_level_read(8, data, &ec->common.data_addr);
- if (!*data)
- status = -ENODATA;
+ /*
+ * 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).
+ */
- 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));
+ snprintf(object_name, 8, "_Q%2.2X", value);
- acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL);
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s", object_name));
- 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'
- };
+ acpi_evaluate_object(ec->handle, object_name, NULL, NULL);
-
- 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->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;
-
- 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;
+ u8 value;
+ struct acpi_ec *ec = (struct acpi_ec *)data;
- 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;
}
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;
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);
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;
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,
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 */
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);
/* 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;
}
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;
- end:
+ end:
if (result)
kfree(ec);
static int acpi_ec_remove(struct acpi_device *device, int type)
{
- union acpi_ec *ec = NULL;
+ struct acpi_ec *ec = NULL;
if (!device)
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;
* 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)
/*
* 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;
}
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)
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;
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;
-
- 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);
+ 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);
+ 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;
}
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);
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");
+ error:
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;
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");
+ error:
+ ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT"));
kfree(ec_ecdt);
ec_ecdt = NULL;
/*
* 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,
&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;
}
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;
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;
}
--- /dev/null
+/*-*-linux-c-*-*/
+
+/*
+ Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
+ */
+
+/*
+ * msi-laptop.c - MSI S270 laptop support. This laptop is sold under
+ * various brands, including "Cytron/TCM/Medion/Tchibo MD96100".
+ *
+ * This driver exports a few files in /sys/devices/platform/msi-laptop-pf/:
+ *
+ * lcd_level - Screen brightness: contains a single integer in the
+ * range 0..8. (rw)
+ *
+ * auto_brightness - Enable automatic brightness control: contains
+ * either 0 or 1. If set to 1 the hardware adjusts the screen
+ * brightness automatically when the power cord is
+ * plugged/unplugged. (rw)
+ *
+ * wlan - WLAN subsystem enabled: contains either 0 or 1. (ro)
+ *
+ * bluetooth - Bluetooth subsystem enabled: contains either 0 or 1
+ * Please note that this file is constantly 0 if no Bluetooth
+ * hardware is available. (ro)
+ *
+ * In addition to these platform device attributes the driver
+ * registers itself in the Linux backlight control subsystem and is
+ * available to userspace under /sys/class/backlight/msi-laptop-bl/.
+ *
+ * This driver might work on other laptops produced by MSI. If you
+ * want to try it you can pass force=1 as argument to the module which
+ * will force it to load even when the DMI data doesn't identify the
+ * laptop as MSI S270. YMMV.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/backlight.h>
+#include <linux/platform_device.h>
+#include <linux/autoconf.h>
+
+#define MSI_DRIVER_VERSION "0.5"
+
+#define MSI_LCD_LEVEL_MAX 9
+
+#define MSI_EC_COMMAND_WIRELESS 0x10
+#define MSI_EC_COMMAND_LCD_LEVEL 0x11
+
+static int force;
+module_param(force, bool, 0);
+MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
+
+static int auto_brightness;
+module_param(auto_brightness, int, 0);
+MODULE_PARM_DESC(auto_brightness, "Enable automatic brightness control (0: disabled; 1: enabled; 2: don't touch)");
+
+/* Hardware access */
+
+static int set_lcd_level(int level)
+{
+ u8 buf[2];
+
+ if (level < 0 || level >= MSI_LCD_LEVEL_MAX)
+ return -EINVAL;
+
+ buf[0] = 0x80;
+ buf[1] = (u8) (level*31);
+
+ return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, buf, sizeof(buf), NULL, 0);
+}
+
+static int get_lcd_level(void)
+{
+ u8 wdata = 0, rdata;
+ int result;
+
+ result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, &rdata, 1);
+ if (result < 0)
+ return result;
+
+ return (int) rdata / 31;
+}
+
+static int get_auto_brightness(void)
+{
+ u8 wdata = 4, rdata;
+ int result;
+
+ result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, &rdata, 1);
+ if (result < 0)
+ return result;
+
+ return !!(rdata & 8);
+}
+
+static int set_auto_brightness(int enable)
+{
+ u8 wdata[2], rdata;
+ int result;
+
+ wdata[0] = 4;
+
+ result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 1, &rdata, 1);
+ if (result < 0)
+ return result;
+
+ wdata[0] = 0x84;
+ wdata[1] = (rdata & 0xF7) | (enable ? 8 : 0);
+
+ return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 2, NULL, 0);
+}
+
+static int get_wireless_state(int *wlan, int *bluetooth)
+{
+ u8 wdata = 0, rdata;
+ int result;
+
+ result = ec_transaction(MSI_EC_COMMAND_WIRELESS, &wdata, 1, &rdata, 1);
+ if (result < 0)
+ return -1;
+
+ if (wlan)
+ *wlan = !!(rdata & 8);
+
+ if (bluetooth)
+ *bluetooth = !!(rdata & 128);
+
+ return 0;
+}
+
+/* Backlight device stuff */
+
+static int bl_get_brightness(struct backlight_device *b)
+{
+ return get_lcd_level();
+}
+
+
+static int bl_update_status(struct backlight_device *b)
+{
+ return set_lcd_level(b->props->brightness);
+}
+
+static struct backlight_properties msibl_props = {
+ .owner = THIS_MODULE,
+ .get_brightness = bl_get_brightness,
+ .update_status = bl_update_status,
+ .max_brightness = MSI_LCD_LEVEL_MAX-1,
+};
+
+static struct backlight_device *msibl_device;
+
+/* Platform device */
+
+static ssize_t show_wlan(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+
+ int ret, enabled;
+
+ ret = get_wireless_state(&enabled, NULL);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%i\n", enabled);
+}
+
+static ssize_t show_bluetooth(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+
+ int ret, enabled;
+
+ ret = get_wireless_state(NULL, &enabled);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%i\n", enabled);
+}
+
+static ssize_t show_lcd_level(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+
+ int ret;
+
+ ret = get_lcd_level();
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%i\n", ret);
+}
+
+static ssize_t store_lcd_level(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+
+ int level, ret;
+
+ if (sscanf(buf, "%i", &level) != 1 || (level < 0 || level >= MSI_LCD_LEVEL_MAX))
+ return -EINVAL;
+
+ ret = set_lcd_level(level);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static ssize_t show_auto_brightness(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+
+ int ret;
+
+ ret = get_auto_brightness();
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%i\n", ret);
+}
+
+static ssize_t store_auto_brightness(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+
+ int enable, ret;
+
+ if (sscanf(buf, "%i", &enable) != 1 || (enable != (enable & 1)))
+ return -EINVAL;
+
+ ret = set_auto_brightness(enable);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static DEVICE_ATTR(lcd_level, 0644, show_lcd_level, store_lcd_level);
+static DEVICE_ATTR(auto_brightness, 0644, show_auto_brightness, store_auto_brightness);
+static DEVICE_ATTR(bluetooth, 0444, show_bluetooth, NULL);
+static DEVICE_ATTR(wlan, 0444, show_wlan, NULL);
+
+static struct attribute *msipf_attributes[] = {
+ &dev_attr_lcd_level.attr,
+ &dev_attr_auto_brightness.attr,
+ &dev_attr_bluetooth.attr,
+ &dev_attr_wlan.attr,
+ NULL
+};
+
+static struct attribute_group msipf_attribute_group = {
+ .attrs = msipf_attributes
+};
+
+static struct platform_driver msipf_driver = {
+ .driver = {
+ .name = "msi-laptop-pf",
+ .owner = THIS_MODULE,
+ }
+};
+
+static struct platform_device *msipf_device;
+
+/* Initialization */
+
+static struct dmi_system_id __initdata msi_dmi_table[] = {
+ {
+ .ident = "MSI S270",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "MICRO-STAR INT'L CO.,LTD"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MS-1013"),
+ }
+ },
+ {
+ .ident = "Medion MD96100",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "NOTEBOOK"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "SAM2000"),
+ }
+ },
+ { }
+};
+
+
+static int __init msi_init(void)
+{
+ int ret;
+
+ if (acpi_disabled)
+ return -ENODEV;
+
+ if (!force && !dmi_check_system(msi_dmi_table))
+ return -ENODEV;
+
+ if (auto_brightness < 0 || auto_brightness > 2)
+ return -EINVAL;
+
+ /* Register backlight stuff */
+
+ msibl_device = backlight_device_register("msi-laptop-bl", NULL, &msibl_props);
+ if (IS_ERR(msibl_device))
+ return PTR_ERR(msibl_device);
+
+ ret = platform_driver_register(&msipf_driver);
+ if (ret)
+ goto fail_backlight;
+
+ /* Register platform stuff */
+
+ msipf_device = platform_device_alloc("msi-laptop-pf", -1);
+ if (!msipf_device) {
+ ret = -ENOMEM;
+ goto fail_platform_driver;
+ }
+
+ ret = platform_device_add(msipf_device);
+ if (ret)
+ goto fail_platform_device1;
+
+ ret = sysfs_create_group(&msipf_device->dev.kobj, &msipf_attribute_group);
+ if (ret)
+ goto fail_platform_device2;
+
+ /* Disable automatic brightness control by default because
+ * this module was probably loaded to do brightness control in
+ * software. */
+
+ if (auto_brightness != 2)
+ set_auto_brightness(auto_brightness);
+
+ printk(KERN_INFO "msi-laptop: driver "MSI_DRIVER_VERSION" successfully loaded.\n");
+
+ return 0;
+
+fail_platform_device2:
+
+ platform_device_del(msipf_device);
+
+fail_platform_device1:
+
+ platform_device_put(msipf_device);
+
+fail_platform_driver:
+
+ platform_driver_unregister(&msipf_driver);
+
+fail_backlight:
+
+ backlight_device_unregister(msibl_device);
+
+ return ret;
+}
+
+static void __exit msi_cleanup(void)
+{
+
+ sysfs_remove_group(&msipf_device->dev.kobj, &msipf_attribute_group);
+ platform_device_unregister(msipf_device);
+ platform_driver_unregister(&msipf_driver);
+ backlight_device_unregister(msibl_device);
+
+ /* Enable automatic brightness control again */
+ if (auto_brightness != 2)
+ set_auto_brightness(1);
+
+ printk(KERN_INFO "msi-laptop: driver unloaded.\n");
+}
+
+module_init(msi_init);
+module_exit(msi_cleanup);
+
+MODULE_AUTHOR("Lennart Poettering");
+MODULE_DESCRIPTION("MSI Laptop Support");
+MODULE_VERSION(MSI_DRIVER_VERSION);
+MODULE_LICENSE("GPL");
projects / cascardo / linux.git / commitdiff