Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
[pandora-kernel.git] / drivers / acpi / ec.c
index e6d4b08..743ce27 100644 (file)
@@ -45,35 +45,34 @@ ACPI_MODULE_NAME("acpi_ec")
 #define ACPI_EC_DRIVER_NAME            "ACPI Embedded Controller Driver"
 #define ACPI_EC_DEVICE_NAME            "Embedded Controller"
 #define ACPI_EC_FILE_INFO              "info"
-
+#undef PREFIX
+#define PREFIX                         "ACPI: EC: "
 /* 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 */
-
 /* 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
-
+enum ec_command {
+       ACPI_EC_COMMAND_READ = 0x80,
+       ACPI_EC_COMMAND_WRITE = 0x81,
+       ACPI_EC_BURST_ENABLE = 0x82,
+       ACPI_EC_BURST_DISABLE = 0x83,
+       ACPI_EC_COMMAND_QUERY = 0x84,
+};
 /* EC events */
-enum {
+enum ec_event {
        ACPI_EC_EVENT_OBF_1 = 1,        /* Output buffer full */
-       ACPI_EC_EVENT_IBF_0,            /* Input buffer empty */
+       ACPI_EC_EVENT_IBF_0,    /* Input buffer empty */
 };
 
-#define ACPI_EC_DELAY          50      /* Wait 50ms max. during EC ops */
+#define ACPI_EC_DELAY          500     /* Wait 500ms 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 enum ec_mode {
+       EC_INTR = 1,            /* Output buffer full */
+       EC_POLL,                /* Input buffer empty */
+} acpi_ec_mode = EC_INTR;
 
 static int acpi_ec_remove(struct acpi_device *device, int type);
 static int acpi_ec_start(struct acpi_device *device);
@@ -93,22 +92,21 @@ static struct acpi_driver acpi_ec_driver = {
 };
 
 /* If we find an EC via the ECDT, we need to keep a ptr to its context */
-struct acpi_ec {
+static struct acpi_ec {
        acpi_handle handle;
        unsigned long uid;
-       unsigned long gpe_bit;
+       unsigned long gpe;
        unsigned long command_addr;
        unsigned long data_addr;
        unsigned long global_lock;
-       struct semaphore sem;
-       unsigned int expect_event;
+       struct mutex lock;
+       atomic_t query_pending;
        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_mode = EC_INTR;
 
 /* --------------------------------------------------------------------------
                              Transaction Management
@@ -134,54 +132,41 @@ static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
        outb(data, ec->data_addr);
 }
 
-static int acpi_ec_check_status(u8 status, u8 event)
+static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event)
 {
-       switch (event) {
-       case ACPI_EC_EVENT_OBF_1:
+       u8 status = acpi_ec_read_status(ec);
+
+       if (event == ACPI_EC_EVENT_OBF_1) {
                if (status & ACPI_EC_FLAG_OBF)
                        return 1;
-               break;
-       case ACPI_EC_EVENT_IBF_0:
+       } else if (event == ACPI_EC_EVENT_IBF_0) {
                if (!(status & ACPI_EC_FLAG_IBF))
                        return 1;
-               break;
-       default:
-               break;
        }
 
        return 0;
 }
 
-static int acpi_ec_wait(struct acpi_ec *ec, u8 event)
+static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event)
 {
-       int i = (acpi_ec_mode == EC_POLL) ? ACPI_EC_UDELAY_COUNT : 0;
-       long time_left;
-
-       ec->expect_event = event;
-       if (acpi_ec_check_status(acpi_ec_read_status(ec), event)) {
-               ec->expect_event = 0;
-               return 0;
-       }
-
-       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));
-                       if (time_left > 0) {
-                               ec->expect_event = 0;
+       if (acpi_ec_mode == EC_POLL) {
+               unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);
+               while (time_before(jiffies, delay)) {
+                       if (acpi_ec_check_status(ec, event))
                                return 0;
-                       }
                }
-               if (acpi_ec_check_status(acpi_ec_read_status(ec), event)) {
-                       ec->expect_event = 0;
+       } else {
+               if (wait_event_timeout(ec->wait,
+                                      acpi_ec_check_status(ec, event),
+                                      msecs_to_jiffies(ACPI_EC_DELAY)) ||
+                   acpi_ec_check_status(ec, event)) {
                        return 0;
+               } else {
+                       printk(KERN_ERR PREFIX "acpi_ec_wait timeout,"
+                              " status = %d, expect_event = %d\n",
+                              acpi_ec_read_status(ec), event);
                }
-       } while (--i > 0);
-
-       ec->expect_event = 0;
+       }
 
        return -ETIME;
 }
@@ -196,7 +181,6 @@ int acpi_ec_enter_burst_mode(struct acpi_ec *ec)
        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_IBF_0);
@@ -212,7 +196,7 @@ int acpi_ec_enter_burst_mode(struct acpi_ec *ec)
 
        atomic_set(&ec->leaving_burst, 0);
        return 0;
-  end:
+      end:
        ACPI_EXCEPTION((AE_INFO, status, "EC wait, burst mode"));
        return -1;
 }
@@ -221,58 +205,68 @@ int acpi_ec_leave_burst_mode(struct acpi_ec *ec)
 {
        u8 status = 0;
 
-
        status = acpi_ec_read_status(ec);
-       if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)){
+       if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)) {
                status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
-               if(status)
+               if (status)
                        goto end;
                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:
+      end:
        ACPI_EXCEPTION((AE_INFO, status, "EC leave burst mode"));
        return -1;
 }
-#endif /* ACPI_FUTURE_USAGE */
+#endif                         /* ACPI_FUTURE_USAGE */
 
 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;
+       int result = 0;
 
        acpi_ec_write_cmd(ec, command);
 
-       for (; wdata_len > 0; wdata_len --) {
+       for (; wdata_len > 0; --wdata_len) {
                result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
-               if (result)
-                       return result;
+               if (result) {
+                       printk(KERN_ERR PREFIX
+                              "write_cmd timeout, command = %d\n", command);
+                       goto end;
+               }
                acpi_ec_write_data(ec, *(wdata++));
        }
 
-       if (command == ACPI_EC_COMMAND_WRITE) {
+       if (!rdata_len) {
                result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
-               if (result)
-                       return result;
+               if (result) {
+                       printk(KERN_ERR PREFIX
+                              "finish-write timeout, command = %d\n", command);
+                       goto end;
+               }
+       } else if (command == ACPI_EC_COMMAND_QUERY) {
+               atomic_set(&ec->query_pending, 0);
        }
 
-       for (; rdata_len > 0; rdata_len --) {
+       for (; rdata_len > 0; --rdata_len) {
                result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1);
-               if (result)
-                       return result;
+               if (result) {
+                       printk(KERN_ERR PREFIX "read timeout, command = %d\n",
+                              command);
+                       goto end;
+               }
 
                *(rdata++) = acpi_ec_read_data(ec);
        }
-
-       return 0;
+      end:
+       return result;
 }
 
 static int acpi_ec_transaction(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 status;
        u32 glk;
@@ -280,36 +274,40 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
        if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata))
                return -EINVAL;
 
-        if (rdata)
-                memset(rdata, 0, rdata_len);
+       if (rdata)
+               memset(rdata, 0, rdata_len);
 
+       mutex_lock(&ec->lock);
        if (ec->global_lock) {
                status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
                if (ACPI_FAILURE(status))
                        return -ENODEV;
        }
-       down(&ec->sem);
+
+       /* Make sure GPE is enabled before doing transaction */
+       acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
 
        status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
        if (status) {
-               printk(KERN_DEBUG PREFIX "read EC, IB not empty\n");
+               printk(KERN_DEBUG PREFIX
+                      "input buffer is not empty, aborting transaction\n");
                goto end;
        }
 
-        status = acpi_ec_transaction_unlocked(ec, command,
-                                              wdata, wdata_len,
-                                              rdata, rdata_len);
+       status = acpi_ec_transaction_unlocked(ec, command,
+                                             wdata, wdata_len,
+                                             rdata, rdata_len);
 
-end:
-       up(&ec->sem);
+      end:
 
        if (ec->global_lock)
                acpi_release_global_lock(glk);
+       mutex_unlock(&ec->lock);
 
        return status;
 }
 
-static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 *data)
+static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data)
 {
        int result;
        u8 d;
@@ -322,15 +320,15 @@ static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 *data)
 
 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,
+       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;
@@ -369,9 +367,9 @@ int ec_write(u8 addr, u8 val)
 
 EXPORT_SYMBOL(ec_write);
 
-extern int ec_transaction(u8 command,
-                          const u8 *wdata, unsigned wdata_len,
-                          u8 *rdata, unsigned rdata_len)
+int ec_transaction(u8 command,
+                         const u8 * wdata, unsigned wdata_len,
+                         u8 * rdata, unsigned rdata_len)
 {
        struct acpi_ec *ec;
 
@@ -386,65 +384,49 @@ extern int ec_transaction(u8 command,
 
 EXPORT_SYMBOL(ec_transaction);
 
-static int acpi_ec_query(struct acpi_ec *ec, u8 *data)
+static int acpi_ec_query(struct acpi_ec *ec, u8 * data)
 {
        int result;
-        u8 d;
+       u8 d;
 
-        if (!ec || !data)
-                return -EINVAL;
+       if (!ec || !data)
+               return -EINVAL;
 
-        /*
-         * 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).
-         */
+       /*
+        * 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).
+        */
 
-        result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1);
-        if (result)
-                return result;
+       result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1);
+       if (result)
+               return result;
 
-        if (!d)
-                return -ENODATA;
+       if (!d)
+               return -ENODATA;
 
-        *data = d;
-        return 0;
+       *data = d;
+       return 0;
 }
 
 /* --------------------------------------------------------------------------
                                 Event Management
    -------------------------------------------------------------------------- */
 
-struct acpi_ec_query_data {
-       acpi_handle handle;
-       u8 data;
-};
-
 static void acpi_ec_gpe_query(void *ec_cxt)
 {
        struct acpi_ec *ec = (struct acpi_ec *)ec_cxt;
        u8 value = 0;
-       static char object_name[8];
+       char object_name[8];
 
-       if (!ec)
-               goto end;
-
-       value = acpi_ec_read_status(ec);
-
-       if (!(value & ACPI_EC_FLAG_SCI))
-               goto end;
-
-       if (acpi_ec_query(ec, &value))
-               goto end;
+       if (!ec || acpi_ec_query(ec, &value))
+               return;
 
        snprintf(object_name, 8, "_Q%2.2X", value);
 
        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 u32 acpi_ec_gpe_handler(void *data)
@@ -453,22 +435,18 @@ static u32 acpi_ec_gpe_handler(void *data)
        u8 value;
        struct acpi_ec *ec = (struct acpi_ec *)data;
 
-       acpi_clear_gpe(NULL, ec->gpe_bit, ACPI_ISR);
-       value = acpi_ec_read_status(ec);
-
        if (acpi_ec_mode == EC_INTR) {
-               if (acpi_ec_check_status(value, ec->expect_event)) {
-                       ec->expect_event = 0;
-                       wake_up(&ec->wait);
-               }
+               wake_up(&ec->wait);
        }
 
-       if (value & ACPI_EC_FLAG_SCI) {
-               status = acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec);
-               return status == AE_OK ?
-                   ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
+       value = acpi_ec_read_status(ec);
+       if ((value & ACPI_EC_FLAG_SCI) && !atomic_read(&ec->query_pending)) {
+               atomic_set(&ec->query_pending, 1);
+               status =
+                   acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query,
+                                   ec);
        }
-       acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_ISR);
+
        return status == AE_OK ?
            ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
 }
@@ -504,7 +482,6 @@ acpi_ec_space_handler(u32 function,
        acpi_integer f_v = 0;
        int i = 0;
 
-
        if ((address > 0xFF) || !value || !handler_context)
                return AE_BAD_PARAMETER;
 
@@ -518,7 +495,7 @@ acpi_ec_space_handler(u32 function,
        switch (function) {
        case ACPI_READ:
                temp = 0;
-               result = acpi_ec_read(ec, (u8) address, (u8 *) &temp);
+               result = acpi_ec_read(ec, (u8) address, (u8 *) & temp);
                break;
        case ACPI_WRITE:
                result = acpi_ec_write(ec, (u8) address, (u8) temp);
@@ -571,18 +548,15 @@ static int acpi_ec_read_info(struct seq_file *seq, void *offset)
 {
        struct acpi_ec *ec = (struct acpi_ec *)seq->private;
 
-
        if (!ec)
                goto end;
 
-       seq_printf(seq, "gpe bit:                 0x%02x\n",
-                  (u32) ec->gpe_bit);
+       seq_printf(seq, "gpe:                 0x%02x\n", (u32) ec->gpe);
        seq_printf(seq, "ports:                   0x%02x, 0x%02x\n",
-                  (u32) ec->command_addr,
-                  (u32) ec->data_addr);
+                  (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_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
 
       end:
        return 0;
@@ -605,7 +579,6 @@ static int acpi_ec_add_fs(struct acpi_device *device)
 {
        struct proc_dir_entry *entry = NULL;
 
-
        if (!acpi_device_dir(device)) {
                acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
                                                     acpi_ec_dir);
@@ -648,18 +621,17 @@ static int acpi_ec_add(struct acpi_device *device)
        acpi_status status = AE_OK;
        struct acpi_ec *ec = NULL;
 
-
        if (!device)
                return -EINVAL;
 
-       ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
+       ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
        if (!ec)
                return -ENOMEM;
-       memset(ec, 0, sizeof(struct acpi_ec));
 
        ec->handle = device->handle;
        ec->uid = -1;
-       init_MUTEX(&ec->sem);
+       mutex_init(&ec->lock);
+       atomic_set(&ec->query_pending, 0);
        if (acpi_ec_mode == EC_INTR) {
                atomic_set(&ec->leaving_burst, 1);
                init_waitqueue_head(&ec->wait);
@@ -669,8 +641,7 @@ static int acpi_ec_add(struct acpi_device *device)
        acpi_driver_data(device) = ec;
 
        /* Use the global lock for all EC transactions? */
-       acpi_evaluate_integer(ec->handle, "_GLK", NULL,
-                             &ec->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 */
@@ -679,7 +650,7 @@ static int acpi_ec_add(struct acpi_device *device)
                                                  ACPI_ADR_SPACE_EC,
                                                  &acpi_ec_space_handler);
 
-               acpi_remove_gpe_handler(NULL, ec_ecdt->gpe_bit,
+               acpi_remove_gpe_handler(NULL, ec_ecdt->gpe,
                                        &acpi_ec_gpe_handler);
 
                kfree(ec_ecdt);
@@ -687,11 +658,10 @@ static int acpi_ec_add(struct acpi_device *device)
 
        /* Get GPE bit assignment (EC events). */
        /* TODO: Add support for _GPE returning a package */
-       status =
-           acpi_evaluate_integer(ec->handle, "_GPE", NULL,
-                                 &ec->gpe_bit);
+       status = acpi_evaluate_integer(ec->handle, "_GPE", NULL, &ec->gpe);
        if (ACPI_FAILURE(status)) {
-               ACPI_EXCEPTION((AE_INFO, status, "Obtaining GPE bit assignment"));
+               ACPI_EXCEPTION((AE_INFO, status,
+                               "Obtaining GPE bit assignment"));
                result = -ENODEV;
                goto end;
        }
@@ -701,13 +671,13 @@ static int acpi_ec_add(struct acpi_device *device)
                goto end;
 
        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s [%s] (gpe %d) interrupt mode.",
-              acpi_device_name(device), acpi_device_bid(device),
-              (u32) ec->gpe_bit));
+                         acpi_device_name(device), acpi_device_bid(device),
+                         (u32) ec->gpe));
 
        if (!first_ec)
                first_ec = device;
 
-  end:
+      end:
        if (result)
                kfree(ec);
 
@@ -718,7 +688,6 @@ static int acpi_ec_remove(struct acpi_device *device, int type)
 {
        struct acpi_ec *ec = NULL;
 
-
        if (!device)
                return -EINVAL;
 
@@ -761,7 +730,6 @@ static int acpi_ec_start(struct acpi_device *device)
        acpi_status status = AE_OK;
        struct acpi_ec *ec = NULL;
 
-
        if (!device)
                return -EINVAL;
 
@@ -782,27 +750,26 @@ static int acpi_ec_start(struct acpi_device *device)
        }
 
        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02lx, ports=0x%2lx,0x%2lx",
-                         ec->gpe_bit, ec->command_addr, ec->data_addr));
+                         ec->gpe, ec->command_addr, ec->data_addr));
 
        /*
         * Install GPE handler
         */
-       status = acpi_install_gpe_handler(NULL, ec->gpe_bit,
+       status = acpi_install_gpe_handler(NULL, ec->gpe,
                                          ACPI_GPE_EDGE_TRIGGERED,
                                          &acpi_ec_gpe_handler, ec);
        if (ACPI_FAILURE(status)) {
                return -ENODEV;
        }
-       acpi_set_gpe_type(NULL, ec->gpe_bit, ACPI_GPE_TYPE_RUNTIME);
-       acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR);
+       acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
+       acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
 
        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->gpe_bit,
-                                       &acpi_ec_gpe_handler);
+               acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
                return -ENODEV;
        }
 
@@ -814,7 +781,6 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
        acpi_status status = AE_OK;
        struct acpi_ec *ec = NULL;
 
-
        if (!device)
                return -EINVAL;
 
@@ -826,9 +792,7 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
        if (ACPI_FAILURE(status))
                return -ENODEV;
 
-       status =
-           acpi_remove_gpe_handler(NULL, ec->gpe_bit,
-                                   &acpi_ec_gpe_handler);
+       status = acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
        if (ACPI_FAILURE(status))
                return -ENODEV;
 
@@ -841,7 +805,7 @@ acpi_fake_ecdt_callback(acpi_handle handle,
 {
        acpi_status status;
 
-       init_MUTEX(&ec_ecdt->sem);
+       mutex_init(&ec_ecdt->lock);
        if (acpi_ec_mode == EC_INTR) {
                init_waitqueue_head(&ec_ecdt->wait);
        }
@@ -853,16 +817,15 @@ acpi_fake_ecdt_callback(acpi_handle handle,
        ec_ecdt->uid = -1;
        acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid);
 
-       status =
-           acpi_evaluate_integer(handle, "_GPE", NULL,
-                                 &ec_ecdt->gpe_bit);
+       status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->gpe);
        if (ACPI_FAILURE(status))
                return status;
        ec_ecdt->global_lock = TRUE;
        ec_ecdt->handle = handle;
 
        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));
+                         ec_ecdt->gpe, ec_ecdt->command_addr,
+                         ec_ecdt->data_addr));
 
        return AE_CTRL_TERMINATE;
 }
@@ -884,12 +847,11 @@ static int __init acpi_ec_fake_ecdt(void)
 
        ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Try to make an fake ECDT"));
 
-       ec_ecdt = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
+       ec_ecdt = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
        if (!ec_ecdt) {
                ret = -ENOMEM;
                goto error;
        }
-       memset(ec_ecdt, 0, sizeof(struct acpi_ec));
 
        status = acpi_get_devices(ACPI_EC_HID,
                                  acpi_fake_ecdt_callback, NULL, NULL);
@@ -901,7 +863,7 @@ static int __init acpi_ec_fake_ecdt(void)
                goto error;
        }
        return 0;
-  error:
+      error:
        return ret;
 }
 
@@ -910,9 +872,8 @@ static int __init 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,
-                                        (struct acpi_table_header **)
-                                        &ecdt_ptr);
+       status = acpi_get_table(ACPI_SIG_ECDT, 1,
+                               (struct acpi_table_header **)&ecdt_ptr);
        if (ACPI_FAILURE(status))
                return -ENODEV;
 
@@ -921,30 +882,28 @@ static int __init acpi_ec_get_real_ecdt(void)
        /*
         * Generate a temporary ec context to use until the namespace is scanned
         */
-       ec_ecdt = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
+       ec_ecdt = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
        if (!ec_ecdt)
                return -ENOMEM;
-       memset(ec_ecdt, 0, sizeof(struct acpi_ec));
 
-       init_MUTEX(&ec_ecdt->sem);
+       mutex_init(&ec_ecdt->lock);
        if (acpi_ec_mode == EC_INTR) {
                init_waitqueue_head(&ec_ecdt->wait);
        }
-       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;
+       ec_ecdt->command_addr = ecdt_ptr->control.address;
+       ec_ecdt->data_addr = ecdt_ptr->data.address;
+       ec_ecdt->gpe = ecdt_ptr->gpe;
        /* use the GL just to be safe */
        ec_ecdt->global_lock = TRUE;
        ec_ecdt->uid = ecdt_ptr->uid;
 
-       status =
-           acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->handle);
+       status = acpi_get_handle(NULL, ecdt_ptr->id, &ec_ecdt->handle);
        if (ACPI_FAILURE(status)) {
                goto error;
        }
 
        return 0;
-  error:
+      error:
        ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT"));
        kfree(ec_ecdt);
        ec_ecdt = NULL;
@@ -970,14 +929,14 @@ int __init acpi_ec_ecdt_probe(void)
        /*
         * Install GPE handler
         */
-       status = acpi_install_gpe_handler(NULL, ec_ecdt->gpe_bit,
+       status = acpi_install_gpe_handler(NULL, ec_ecdt->gpe,
                                          ACPI_GPE_EDGE_TRIGGERED,
                                          &acpi_ec_gpe_handler, ec_ecdt);
        if (ACPI_FAILURE(status)) {
                goto error;
        }
-       acpi_set_gpe_type(NULL, ec_ecdt->gpe_bit, ACPI_GPE_TYPE_RUNTIME);
-       acpi_enable_gpe(NULL, ec_ecdt->gpe_bit, ACPI_NOT_ISR);
+       acpi_set_gpe_type(NULL, ec_ecdt->gpe, ACPI_GPE_TYPE_RUNTIME);
+       acpi_enable_gpe(NULL, ec_ecdt->gpe, ACPI_NOT_ISR);
 
        status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT,
                                                    ACPI_ADR_SPACE_EC,
@@ -985,7 +944,7 @@ int __init acpi_ec_ecdt_probe(void)
                                                    &acpi_ec_space_setup,
                                                    ec_ecdt);
        if (ACPI_FAILURE(status)) {
-               acpi_remove_gpe_handler(NULL, ec_ecdt->gpe_bit,
+               acpi_remove_gpe_handler(NULL, ec_ecdt->gpe,
                                        &acpi_ec_gpe_handler);
                goto error;
        }
@@ -1004,7 +963,6 @@ static int __init acpi_ec_init(void)
 {
        int result = 0;
 
-
        if (acpi_disabled)
                return 0;
 
@@ -1057,7 +1015,8 @@ static int __init acpi_ec_set_intr_mode(char *str)
                acpi_ec_mode = EC_POLL;
        }
        acpi_ec_driver.ops.add = acpi_ec_add;
-       ACPI_DEBUG_PRINT((ACPI_DB_INFO, "EC %s mode.\n", intr ? "interrupt" : "polling"));
+       printk(KERN_NOTICE PREFIX "%s mode.\n",
+                         intr ? "interrupt" : "polling");
 
        return 1;
 }