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path: root/drivers/acpi/ec.c
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Diffstat (limited to 'drivers/acpi/ec.c')
-rw-r--r--drivers/acpi/ec.c146
1 files changed, 21 insertions, 125 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 5f2027d782e8..f31291ba94d0 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -34,8 +34,6 @@
#include <linux/init.h>
#include <linux/types.h>
#include <linux/delay.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/spinlock.h>
@@ -45,10 +43,13 @@
#include <acpi/acpi_drivers.h>
#include <linux/dmi.h>
+#include "internal.h"
+
#define ACPI_EC_CLASS "embedded_controller"
#define ACPI_EC_DEVICE_NAME "Embedded Controller"
#define ACPI_EC_FILE_INFO "info"
+#undef PREFIX
#define PREFIX "ACPI: EC: "
/* EC status register */
@@ -106,19 +107,8 @@ struct transaction {
bool done;
};
-static struct acpi_ec {
- acpi_handle handle;
- unsigned long gpe;
- unsigned long command_addr;
- unsigned long data_addr;
- unsigned long global_lock;
- unsigned long flags;
- struct mutex lock;
- wait_queue_head_t wait;
- struct list_head list;
- struct transaction *curr;
- spinlock_t curr_lock;
-} *boot_ec, *first_ec;
+struct acpi_ec *boot_ec, *first_ec;
+EXPORT_SYMBOL(first_ec);
static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */
static int EC_FLAGS_VALIDATE_ECDT; /* ASUStec ECDTs need to be validated */
@@ -313,11 +303,8 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
pr_debug(PREFIX "transaction start\n");
/* disable GPE during transaction if storm is detected */
if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
- /*
- * It has to be disabled at the hardware level regardless of the
- * GPE reference counting, so that it doesn't trigger.
- */
- acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);
+ /* It has to be disabled, so that it doesn't trigger. */
+ acpi_disable_gpe(NULL, ec->gpe);
}
status = acpi_ec_transaction_unlocked(ec, t);
@@ -326,12 +313,8 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
ec_check_sci_sync(ec, acpi_ec_read_status(ec));
if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
msleep(1);
- /*
- * It is safe to enable the GPE outside of the transaction. Use
- * acpi_set_gpe() for that, since we used it to disable the GPE
- * above.
- */
- acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);
+ /* It is safe to enable the GPE outside of the transaction. */
+ acpi_enable_gpe(NULL, ec->gpe);
} else if (t->irq_count > ACPI_EC_STORM_THRESHOLD) {
pr_info(PREFIX "GPE storm detected, "
"transactions will use polling mode\n");
@@ -679,72 +662,6 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address,
}
/* --------------------------------------------------------------------------
- FS Interface (/proc)
- -------------------------------------------------------------------------- */
-
-static struct proc_dir_entry *acpi_ec_dir;
-
-static int acpi_ec_read_info(struct seq_file *seq, void *offset)
-{
- struct acpi_ec *ec = seq->private;
-
- if (!ec)
- goto end;
-
- seq_printf(seq, "gpe:\t\t\t0x%02x\n", (u32) ec->gpe);
- seq_printf(seq, "ports:\t\t\t0x%02x, 0x%02x\n",
- (unsigned)ec->command_addr, (unsigned)ec->data_addr);
- seq_printf(seq, "use global lock:\t%s\n",
- ec->global_lock ? "yes" : "no");
- end:
- return 0;
-}
-
-static int acpi_ec_info_open_fs(struct inode *inode, struct file *file)
-{
- return single_open(file, acpi_ec_read_info, PDE(inode)->data);
-}
-
-static const struct file_operations acpi_ec_info_ops = {
- .open = acpi_ec_info_open_fs,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .owner = THIS_MODULE,
-};
-
-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);
- if (!acpi_device_dir(device))
- return -ENODEV;
- }
-
- entry = proc_create_data(ACPI_EC_FILE_INFO, S_IRUGO,
- acpi_device_dir(device),
- &acpi_ec_info_ops, acpi_driver_data(device));
- if (!entry)
- return -ENODEV;
- return 0;
-}
-
-static int acpi_ec_remove_fs(struct acpi_device *device)
-{
-
- if (acpi_device_dir(device)) {
- remove_proc_entry(ACPI_EC_FILE_INFO, acpi_device_dir(device));
- remove_proc_entry(acpi_device_bid(device), acpi_ec_dir);
- acpi_device_dir(device) = NULL;
- }
-
- return 0;
-}
-
-/* --------------------------------------------------------------------------
Driver Interface
-------------------------------------------------------------------------- */
static acpi_status
@@ -822,7 +739,7 @@ static int ec_install_handlers(struct acpi_ec *ec)
if (ACPI_FAILURE(status))
return -ENODEV;
- acpi_enable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
+ acpi_enable_gpe(NULL, ec->gpe);
status = acpi_install_address_space_handler(ec->handle,
ACPI_ADR_SPACE_EC,
&acpi_ec_space_handler,
@@ -839,7 +756,7 @@ static int ec_install_handlers(struct acpi_ec *ec)
} else {
acpi_remove_gpe_handler(NULL, ec->gpe,
&acpi_ec_gpe_handler);
- acpi_disable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
+ acpi_disable_gpe(NULL, ec->gpe);
return -ENODEV;
}
}
@@ -850,7 +767,7 @@ static int ec_install_handlers(struct acpi_ec *ec)
static void ec_remove_handlers(struct acpi_ec *ec)
{
- acpi_disable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
+ acpi_disable_gpe(NULL, ec->gpe);
if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle,
ACPI_ADR_SPACE_EC, &acpi_ec_space_handler)))
pr_err(PREFIX "failed to remove space handler\n");
@@ -894,7 +811,12 @@ static int acpi_ec_add(struct acpi_device *device)
if (!first_ec)
first_ec = ec;
device->driver_data = ec;
- acpi_ec_add_fs(device);
+
+ WARN(!request_region(ec->data_addr, 1, "EC data"),
+ "Could not request EC data io port 0x%lx", ec->data_addr);
+ WARN(!request_region(ec->command_addr, 1, "EC cmd"),
+ "Could not request EC cmd io port 0x%lx", ec->command_addr);
+
pr_info(PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n",
ec->gpe, ec->command_addr, ec->data_addr);
@@ -921,7 +843,8 @@ static int acpi_ec_remove(struct acpi_device *device, int type)
kfree(handler);
}
mutex_unlock(&ec->lock);
- acpi_ec_remove_fs(device);
+ release_region(ec->data_addr, 1);
+ release_region(ec->command_addr, 1);
device->driver_data = NULL;
if (ec == first_ec)
first_ec = NULL;
@@ -1088,22 +1011,6 @@ error:
return -ENODEV;
}
-static int acpi_ec_suspend(struct acpi_device *device, pm_message_t state)
-{
- struct acpi_ec *ec = acpi_driver_data(device);
- /* Stop using the GPE, but keep it reference counted. */
- acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);
- return 0;
-}
-
-static int acpi_ec_resume(struct acpi_device *device)
-{
- struct acpi_ec *ec = acpi_driver_data(device);
- /* Enable the GPE again, but don't reference count it once more. */
- acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);
- return 0;
-}
-
static struct acpi_driver acpi_ec_driver = {
.name = "ec",
.class = ACPI_EC_CLASS,
@@ -1111,8 +1018,6 @@ static struct acpi_driver acpi_ec_driver = {
.ops = {
.add = acpi_ec_add,
.remove = acpi_ec_remove,
- .suspend = acpi_ec_suspend,
- .resume = acpi_ec_resume,
},
};
@@ -1120,16 +1025,10 @@ int __init acpi_ec_init(void)
{
int result = 0;
- acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir);
- if (!acpi_ec_dir)
- return -ENODEV;
-
/* Now register the driver for the EC */
result = acpi_bus_register_driver(&acpi_ec_driver);
- if (result < 0) {
- remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir);
+ if (result < 0)
return -ENODEV;
- }
return result;
}
@@ -1140,9 +1039,6 @@ static void __exit acpi_ec_exit(void)
{
acpi_bus_unregister_driver(&acpi_ec_driver);
-
- remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir);
-
return;
}
#endif /* 0 */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.