diff options
author | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-07-13 15:25:59 +0100 |
---|---|---|
committer | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-07-13 15:25:59 +0100 |
commit | 30beab1491f0b96b2f23d3fb68af01fd921a16d8 (patch) | |
tree | c580bdc0846269fbb10feeda901ecec1a48ee2ef /drivers/acpi/ec.c | |
parent | 21af6c4f2aa5f63138871b4ddd77d7ebf2588c9d (diff) | |
parent | c32511e2718618f0b53479eb36e07439aa363a74 (diff) |
Merge with /shiny/git/linux-2.6/.git
Diffstat (limited to 'drivers/acpi/ec.c')
-rw-r--r-- | drivers/acpi/ec.c | 420 |
1 files changed, 288 insertions, 132 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index fdf143b405b..8e665f2e313 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -31,6 +31,7 @@ #include <linux/delay.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> +#include <linux/interrupt.h> #include <asm/io.h> #include <acpi/acpi_bus.h> #include <acpi/acpi_drivers.h> @@ -49,17 +50,19 @@ ACPI_MODULE_NAME ("acpi_ec") #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_UDELAY 100 /* Poll @ 100us increments */ -#define ACPI_EC_UDELAY_COUNT 1000 /* Wait 10ms max. during EC ops */ +#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_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 static int acpi_ec_add (struct acpi_device *device); @@ -87,7 +90,11 @@ struct acpi_ec { struct acpi_generic_address command_addr; struct acpi_generic_address data_addr; unsigned long global_lock; - spinlock_t 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; }; /* If we find an EC via the ECDT, we need to keep a ptr to its context */ @@ -100,42 +107,122 @@ static struct acpi_device *first_ec; Transaction Management -------------------------------------------------------------------------- */ -static int -acpi_ec_wait ( - struct acpi_ec *ec, - u8 event) +static inline u32 acpi_ec_read_status(struct acpi_ec *ec) { - u32 acpi_ec_status = 0; - u32 i = ACPI_EC_UDELAY_COUNT; + u32 status = 0; - if (!ec) - return -EINVAL; + acpi_hw_low_level_read(8, &status, &ec->status_addr); + return status; +} + +static int acpi_ec_wait(struct acpi_ec *ec, unsigned int event) +{ + int result = 0; + + ACPI_FUNCTION_TRACE("acpi_ec_wait"); - /* Poll the EC status register waiting for the event to occur. */ + ec->expect_event = event; + smp_mb(); + + result = wait_event_interruptible_timeout(ec->wait, + !ec->expect_event, + msecs_to_jiffies(ACPI_EC_DELAY)); + + ec->expect_event = 0; + smp_mb(); + + if (result < 0){ + ACPI_DEBUG_PRINT((ACPI_DB_ERROR," result = %d ", result)); + return_VALUE(result); + } + + /* + * 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: - do { - acpi_hw_low_level_read(8, &acpi_ec_status, &ec->status_addr); - if (acpi_ec_status & ACPI_EC_FLAG_OBF) - return 0; - udelay(ACPI_EC_UDELAY); - } while (--i>0); + if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_OBF) + return_VALUE(0); break; + case ACPI_EC_EVENT_IBE: - do { - acpi_hw_low_level_read(8, &acpi_ec_status, &ec->status_addr); - if (!(acpi_ec_status & ACPI_EC_FLAG_IBF)) - return 0; - udelay(ACPI_EC_UDELAY); - } while (--i>0); + if (~acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) + return_VALUE(0); break; - default: - return -EINVAL; } - return -ETIME; + return_VALUE(-ETIME); +} + + + +static int +acpi_ec_enter_burst_mode ( + struct acpi_ec *ec) +{ + u32 tmp = 0; + int status = 0; + + ACPI_FUNCTION_TRACE("acpi_ec_enter_burst_mode"); + + status = acpi_ec_read_status(ec); + if (status != -EINVAL && + !(status & ACPI_EC_FLAG_BURST)){ + ACPI_DEBUG_PRINT((ACPI_DB_INFO,"entering burst mode \n")); + acpi_hw_low_level_write(8, ACPI_EC_BURST_ENABLE, &ec->command_addr); + status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); + if (status){ + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); + ACPI_DEBUG_PRINT((ACPI_DB_ERROR," status = %d\n", status)); + return_VALUE(-EINVAL); + } + acpi_hw_low_level_read(8, &tmp, &ec->data_addr); + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); + if(tmp != 0x90 ) {/* Burst ACK byte*/ + ACPI_DEBUG_PRINT((ACPI_DB_ERROR,"Ack failed \n")); + return_VALUE(-EINVAL); + } + } else + ACPI_DEBUG_PRINT((ACPI_DB_INFO,"already be in burst mode \n")); + atomic_set(&ec->leaving_burst , 0); + return_VALUE(0); } +static int +acpi_ec_leave_burst_mode ( + struct acpi_ec *ec) +{ + int status =0; + + ACPI_FUNCTION_TRACE("acpi_ec_leave_burst_mode"); + + atomic_set(&ec->leaving_burst , 1); + status = acpi_ec_read_status(ec); + if (status != -EINVAL && + (status & ACPI_EC_FLAG_BURST)){ + ACPI_DEBUG_PRINT((ACPI_DB_INFO,"leaving burst mode\n")); + acpi_hw_low_level_write(8, ACPI_EC_BURST_DISABLE, &ec->command_addr); + status = acpi_ec_wait(ec, ACPI_EC_FLAG_IBF); + if (status){ + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); + ACPI_DEBUG_PRINT((ACPI_DB_ERROR,"------->wait fail\n")); + return_VALUE(-EINVAL); + } + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); + status = acpi_ec_read_status(ec); + if (status != -EINVAL && + (status & ACPI_EC_FLAG_BURST)) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR,"------->status fail\n")); + return_VALUE(-EINVAL); + } + }else + ACPI_DEBUG_PRINT((ACPI_DB_INFO,"already be in Non-burst mode \n")); + ACPI_DEBUG_PRINT((ACPI_DB_INFO,"leaving burst mode\n")); + + return_VALUE(0); +} static int acpi_ec_read ( @@ -143,16 +230,15 @@ acpi_ec_read ( u8 address, u32 *data) { - acpi_status status = AE_OK; - int result = 0; - unsigned long flags = 0; - u32 glk = 0; + int status = 0; + u32 glk; ACPI_FUNCTION_TRACE("acpi_ec_read"); if (!ec || !data) return_VALUE(-EINVAL); +retry: *data = 0; if (ec->global_lock) { @@ -160,32 +246,50 @@ acpi_ec_read ( if (ACPI_FAILURE(status)) return_VALUE(-ENODEV); } - - spin_lock_irqsave(&ec->lock, flags); + + WARN_ON(in_interrupt()); + down(&ec->sem); + + if(acpi_ec_enter_burst_mode(ec)) + goto end; acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, &ec->command_addr); - result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (result) + status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); + if (status) { goto end; + } acpi_hw_low_level_write(8, address, &ec->data_addr); - result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); - if (result) + status= acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); + if (status){ + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); goto end; - + } acpi_hw_low_level_read(8, data, &ec->data_addr); + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n", *data, address)); - + end: - spin_unlock_irqrestore(&ec->lock, flags); + acpi_ec_leave_burst_mode(ec); + up(&ec->sem); if (ec->global_lock) acpi_release_global_lock(glk); - return_VALUE(result); + if(atomic_read(&ec->leaving_burst) == 2){ + ACPI_DEBUG_PRINT((ACPI_DB_INFO,"aborted, retry ...\n")); + while(atomic_read(&ec->pending_gpe)){ + msleep(1); + } + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); + goto retry; + } + + return_VALUE(status); } @@ -195,49 +299,80 @@ acpi_ec_write ( u8 address, u8 data) { - int result = 0; - acpi_status status = AE_OK; - unsigned long flags = 0; - u32 glk = 0; + int status = 0; + u32 glk; + u32 tmp; ACPI_FUNCTION_TRACE("acpi_ec_write"); if (!ec) return_VALUE(-EINVAL); - +retry: if (ec->global_lock) { status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); if (ACPI_FAILURE(status)) return_VALUE(-ENODEV); } - spin_lock_irqsave(&ec->lock, flags); + WARN_ON(in_interrupt()); + down(&ec->sem); + + if(acpi_ec_enter_burst_mode(ec)) + goto end; + + status = acpi_ec_read_status(ec); + if (status != -EINVAL && + !(status & ACPI_EC_FLAG_BURST)){ + acpi_hw_low_level_write(8, ACPI_EC_BURST_ENABLE, &ec->command_addr); + status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); + if (status) + goto end; + acpi_hw_low_level_read(8, &tmp, &ec->data_addr); + if(tmp != 0x90 ) /* Burst ACK byte*/ + goto end; + } + /*Now we are in burst mode*/ acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, &ec->command_addr); - result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (result) + status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); + if (status){ goto end; + } acpi_hw_low_level_write(8, address, &ec->data_addr); - result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (result) + status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + if (status){ + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); goto end; + } acpi_hw_low_level_write(8, data, &ec->data_addr); - result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (result) + status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); + if (status) goto end; ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n", data, address)); end: - spin_unlock_irqrestore(&ec->lock, flags); + acpi_ec_leave_burst_mode(ec); + up(&ec->sem); if (ec->global_lock) acpi_release_global_lock(glk); - return_VALUE(result); + if(atomic_read(&ec->leaving_burst) == 2){ + ACPI_DEBUG_PRINT((ACPI_DB_INFO,"aborted, retry ...\n")); + while(atomic_read(&ec->pending_gpe)){ + msleep(1); + } + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); + goto retry; + } + + return_VALUE(status); } /* @@ -289,16 +424,13 @@ acpi_ec_query ( struct acpi_ec *ec, u32 *data) { - int result = 0; - acpi_status status = AE_OK; - unsigned long flags = 0; - u32 glk = 0; + int status = 0; + u32 glk; ACPI_FUNCTION_TRACE("acpi_ec_query"); if (!ec || !data) return_VALUE(-EINVAL); - *data = 0; if (ec->global_lock) { @@ -307,29 +439,39 @@ acpi_ec_query ( return_VALUE(-ENODEV); } + down(&ec->sem); + if(acpi_ec_enter_burst_mode(ec)) + 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). */ - spin_lock_irqsave(&ec->lock, flags); - acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, &ec->command_addr); - result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); - if (result) + status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); + if (status){ + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); goto end; - + } + acpi_hw_low_level_read(8, data, &ec->data_addr); + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); if (!*data) - result = -ENODATA; + status = -ENODATA; end: - spin_unlock_irqrestore(&ec->lock, flags); + acpi_ec_leave_burst_mode(ec); + up(&ec->sem); if (ec->global_lock) acpi_release_global_lock(glk); - return_VALUE(result); + if(atomic_read(&ec->leaving_burst) == 2){ + ACPI_DEBUG_PRINT((ACPI_DB_INFO,"aborted, retry ...\n")); + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); + status = -ENODATA; + } + return_VALUE(status); } @@ -347,42 +489,29 @@ acpi_ec_gpe_query ( void *ec_cxt) { struct acpi_ec *ec = (struct acpi_ec *) ec_cxt; - u32 value = 0; - unsigned long flags = 0; + 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_FUNCTION_TRACE("acpi_ec_gpe_query"); - if (!ec_cxt) - goto end; - - spin_lock_irqsave(&ec->lock, flags); - acpi_hw_low_level_read(8, &value, &ec->command_addr); - spin_unlock_irqrestore(&ec->lock, flags); + if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI) + result = acpi_ec_query(ec, &value); - /* 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)) + if (result) 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->handle, object_name, NULL, NULL); - -end: - acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); +end: + atomic_dec(&ec->pending_gpe); + return; } static u32 @@ -390,6 +519,7 @@ acpi_ec_gpe_handler ( void *data) { acpi_status status = AE_OK; + u32 value; struct acpi_ec *ec = (struct acpi_ec *) data; if (!ec) @@ -397,13 +527,41 @@ acpi_ec_gpe_handler ( acpi_disable_gpe(NULL, ec->gpe_bit, ACPI_ISR); - status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE, - acpi_ec_gpe_query, ec); + value = acpi_ec_read_status(ec); - if (status == AE_OK) - return ACPI_INTERRUPT_HANDLED; - else - return ACPI_INTERRUPT_NOT_HANDLED; + if((value & ACPI_EC_FLAG_IBF) && + !(value & ACPI_EC_FLAG_BURST) && + (atomic_read(&ec->leaving_burst) == 0)) { + /* + * the embedded controller disables + * burst mode for any reason other + * than the burst disable command + * to process critical event. + */ + atomic_set(&ec->leaving_burst , 2); /* block current pending transaction + and retry */ + wake_up(&ec->wait); + }else { + if ((ec->expect_event == ACPI_EC_EVENT_OBF && + (value & ACPI_EC_FLAG_OBF)) || + (ec->expect_event == ACPI_EC_EVENT_IBE && + !(value & ACPI_EC_FLAG_IBF))) { + ec->expect_event = 0; + wake_up(&ec->wait); + return ACPI_INTERRUPT_HANDLED; + } + } + + if (value & ACPI_EC_FLAG_SCI){ + atomic_add(1, &ec->pending_gpe) ; + status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE, + acpi_ec_gpe_query, ec); + return status == AE_OK ? + ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; + } + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_ISR); + return status == AE_OK ? + ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; } /* -------------------------------------------------------------------------- @@ -421,10 +579,8 @@ acpi_ec_space_setup ( * The EC object is in the handler context and is needed * when calling the acpi_ec_space_handler. */ - if(function == ACPI_REGION_DEACTIVATE) - *return_context = NULL; - else - *return_context = handler_context; + *return_context = (function != ACPI_REGION_DEACTIVATE) ? + handler_context : NULL; return AE_OK; } @@ -441,7 +597,7 @@ acpi_ec_space_handler ( { int result = 0; struct acpi_ec *ec = NULL; - u32 temp = 0; + u64 temp = *value; acpi_integer f_v = 0; int i = 0; @@ -450,10 +606,9 @@ acpi_ec_space_handler ( if ((address > 0xFF) || !value || !handler_context) return_VALUE(AE_BAD_PARAMETER); - if(bit_width != 8) { + if (bit_width != 8 && acpi_strict) { printk(KERN_WARNING PREFIX "acpi_ec_space_handler: bit_width should be 8\n"); - if (acpi_strict) - return_VALUE(AE_BAD_PARAMETER); + return_VALUE(AE_BAD_PARAMETER); } ec = (struct acpi_ec *) handler_context; @@ -461,11 +616,11 @@ acpi_ec_space_handler ( next_byte: switch (function) { case ACPI_READ: - result = acpi_ec_read(ec, (u8) address, &temp); - *value = (acpi_integer) temp; + temp = 0; + result = acpi_ec_read(ec, (u8) address, (u32 *)&temp); break; case ACPI_WRITE: - result = acpi_ec_write(ec, (u8) address, (u8) *value); + result = acpi_ec_write(ec, (u8) address, (u8) temp); break; default: result = -EINVAL; @@ -474,19 +629,18 @@ next_byte: } bit_width -= 8; - if(bit_width){ - - if(function == ACPI_READ) - f_v |= (acpi_integer) (*value) << 8*i; - if(function == ACPI_WRITE) - (*value) >>=8; + if (bit_width) { + if (function == ACPI_READ) + f_v |= temp << 8 * i; + if (function == ACPI_WRITE) + temp >>= 8; i++; + address++; goto next_byte; } - - if(function == ACPI_READ){ - f_v |= (acpi_integer) (*value) << 8*i; + if (function == ACPI_READ) { + f_v |= temp << 8 * i; *value = f_v; } @@ -505,8 +659,6 @@ out: default: return_VALUE(AE_OK); } - - } @@ -533,6 +685,7 @@ acpi_ec_read_info (struct seq_file *seq, void *offset) (u32) ec->status_addr.address, (u32) ec->data_addr.address); seq_printf(seq, "use global lock: %s\n", ec->global_lock?"yes":"no"); + acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); end: return_VALUE(0); @@ -555,7 +708,7 @@ static int acpi_ec_add_fs ( struct acpi_device *device) { - struct proc_dir_entry *entry = NULL; + struct proc_dir_entry *entry; ACPI_FUNCTION_TRACE("acpi_ec_add_fs"); @@ -606,9 +759,9 @@ static int acpi_ec_add ( struct acpi_device *device) { - int result = 0; - acpi_status status = AE_OK; - struct acpi_ec *ec = NULL; + int result; + acpi_status status; + struct acpi_ec *ec; unsigned long uid; ACPI_FUNCTION_TRACE("acpi_ec_add"); @@ -623,7 +776,10 @@ acpi_ec_add ( ec->handle = device->handle; ec->uid = -1; - spin_lock_init(&ec->lock); + atomic_set(&ec->pending_gpe, 0); + atomic_set(&ec->leaving_burst , 1); + init_MUTEX(&ec->sem); + init_waitqueue_head(&ec->wait); strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_EC_CLASS); acpi_driver_data(device) = ec; @@ -637,7 +793,7 @@ acpi_ec_add ( if (ec_ecdt && ec_ecdt->uid == uid) { acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, ACPI_ADR_SPACE_EC, &acpi_ec_space_handler); - + acpi_remove_gpe_handler(NULL, ec_ecdt->gpe_bit, &acpi_ec_gpe_handler); kfree(ec_ecdt); @@ -677,7 +833,7 @@ acpi_ec_remove ( struct acpi_device *device, int type) { - struct acpi_ec *ec = NULL; + struct acpi_ec *ec; ACPI_FUNCTION_TRACE("acpi_ec_remove"); @@ -732,8 +888,8 @@ static int acpi_ec_start ( struct acpi_device *device) { - acpi_status status = AE_OK; - struct acpi_ec *ec = NULL; + acpi_status status; + struct acpi_ec *ec; ACPI_FUNCTION_TRACE("acpi_ec_start"); @@ -789,8 +945,8 @@ acpi_ec_stop ( struct acpi_device *device, int type) { - acpi_status status = AE_OK; - struct acpi_ec *ec = NULL; + acpi_status status; + struct acpi_ec *ec; ACPI_FUNCTION_TRACE("acpi_ec_stop"); @@ -832,7 +988,6 @@ acpi_fake_ecdt_callback ( status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->gpe_bit); if (ACPI_FAILURE(status)) return status; - spin_lock_init(&ec_ecdt->lock); ec_ecdt->global_lock = TRUE; ec_ecdt->handle = handle; @@ -890,7 +1045,7 @@ acpi_ec_get_real_ecdt(void) acpi_status status; struct acpi_table_ecdt *ecdt_ptr; - status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, + status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, (struct acpi_table_header **) &ecdt_ptr); if (ACPI_FAILURE(status)) return -ENODEV; @@ -905,11 +1060,12 @@ acpi_ec_get_real_ecdt(void) return -ENOMEM; memset(ec_ecdt, 0, sizeof(struct acpi_ec)); + init_MUTEX(&ec_ecdt->sem); + 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->gpe_bit = ecdt_ptr->gpe_bit; - spin_lock_init(&ec_ecdt->lock); /* use the GL just to be safe */ ec_ecdt->global_lock = TRUE; ec_ecdt->uid = ecdt_ptr->uid; @@ -978,7 +1134,7 @@ error: static int __init acpi_ec_init (void) { - int result = 0; + int result; ACPI_FUNCTION_TRACE("acpi_ec_init"); |