#include <asm/io.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
-#include <acpi/actypes.h>
#define ACPI_EC_CLASS "embedded_controller"
#define ACPI_EC_DEVICE_NAME "Embedded Controller"
#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 /* Wait 100us before polling EC again */
+#define ACPI_EC_CDELAY 10 /* Wait 10us before polling EC */
#define ACPI_EC_STORM_THRESHOLD 8 /* number of false interrupts
per one transaction */
spinlock_t curr_lock;
} *boot_ec, *first_ec;
-/*
- * Some Asus system have exchanged ECDT data/command IO addresses.
- */
-static int print_ecdt_error(const struct dmi_system_id *id)
-{
- printk(KERN_NOTICE PREFIX "%s detected - "
- "ECDT has exchanged control/data I/O address\n",
- id->ident);
- return 0;
-}
-
-static struct dmi_system_id __cpuinitdata ec_dmi_table[] = {
- {
- print_ecdt_error, "Asus L4R", {
- DMI_MATCH(DMI_BIOS_VERSION, "1008.006"),
- DMI_MATCH(DMI_PRODUCT_NAME, "L4R"),
- DMI_MATCH(DMI_BOARD_NAME, "L4R") }, NULL},
- {
- print_ecdt_error, "Asus M6R", {
- DMI_MATCH(DMI_BIOS_VERSION, "0207"),
- DMI_MATCH(DMI_PRODUCT_NAME, "M6R"),
- DMI_MATCH(DMI_BOARD_NAME, "M6R") }, NULL},
- {},
-};
+static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */
/* --------------------------------------------------------------------------
Transaction Management
goto unlock;
err:
/* false interrupt, state didn't change */
- ++ec->curr->irq_count;
+ if (in_interrupt())
+ ++ec->curr->irq_count;
unlock:
spin_unlock_irqrestore(&ec->curr_lock, flags);
}
return 0;
}
+static void ec_delay(void)
+{
+ /* EC in MSI notebooks don't tolerate delays other than 550 usec */
+ if (EC_FLAGS_MSI)
+ udelay(ACPI_EC_DELAY);
+ else
+ /* Use shortest sleep available */
+ msleep(1);
+}
+
static int ec_poll(struct acpi_ec *ec)
{
unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);
- udelay(ACPI_EC_UDELAY);
+ udelay(ACPI_EC_CDELAY);
while (time_before(jiffies, delay)) {
gpe_transaction(ec, acpi_ec_read_status(ec));
- udelay(ACPI_EC_UDELAY);
+ ec_delay();
if (ec_transaction_done(ec))
return 0;
}
clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);
acpi_disable_gpe(NULL, ec->gpe);
}
+ if (EC_FLAGS_MSI)
+ udelay(ACPI_EC_DELAY);
/* start transaction */
spin_lock_irqsave(&ec->curr_lock, tmp);
/* following two actions should be kept atomic */
* Note: samsung nv5000 doesn't work with ec burst mode.
* http://bugzilla.kernel.org/show_bug.cgi?id=4980
*/
-int acpi_ec_burst_enable(struct acpi_ec *ec)
+static int acpi_ec_burst_enable(struct acpi_ec *ec)
{
u8 d;
struct transaction t = {.command = ACPI_EC_BURST_ENABLE,
return acpi_ec_transaction(ec, &t, 0);
}
-int acpi_ec_burst_disable(struct acpi_ec *ec)
+static int acpi_ec_burst_disable(struct acpi_ec *ec)
{
struct transaction t = {.command = ACPI_EC_BURST_DISABLE,
.wdata = NULL, .rdata = NULL,
pr_debug(PREFIX "~~~> interrupt\n");
status = acpi_ec_read_status(ec);
- gpe_transaction(ec, status);
- if (ec_transaction_done(ec) && (status & ACPI_EC_FLAG_IBF) == 0)
- wake_up(&ec->wait);
+ if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) {
+ gpe_transaction(ec, status);
+ if (ec_transaction_done(ec) &&
+ (status & ACPI_EC_FLAG_IBF) == 0)
+ wake_up(&ec->wait);
+ }
ec_check_sci(ec, status);
if (!test_bit(EC_FLAGS_GPE_MODE, &ec->flags) &&
return single_open(file, acpi_ec_read_info, PDE(inode)->data);
}
-static struct file_operations acpi_ec_info_ops = {
+static const struct file_operations acpi_ec_info_ops = {
.open = acpi_ec_info_open_fs,
.read = seq_read,
.llseek = seq_lseek,
acpi_ec_register_query_methods(acpi_handle handle, u32 level,
void *context, void **return_value)
{
- struct acpi_namespace_node *node = handle;
+ char node_name[5];
+ struct acpi_buffer buffer = { sizeof(node_name), node_name };
struct acpi_ec *ec = context;
int value = 0;
- if (sscanf(node->name.ascii, "_Q%x", &value) == 1) {
+ acpi_status status;
+
+ status = acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer);
+
+ if (ACPI_SUCCESS(status) && sscanf(node_name, "_Q%x", &value) == 1) {
acpi_ec_add_query_handler(ec, value, handle, NULL, NULL);
}
return AE_OK;
ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
{
acpi_status status;
- unsigned long long tmp;
+ unsigned long long tmp = 0;
struct acpi_ec *ec = context;
+
+ /* clear addr values, ec_parse_io_ports depend on it */
+ ec->command_addr = ec->data_addr = 0;
+
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
ec_parse_io_ports, ec);
if (ACPI_FAILURE(status))
return status;
ec->gpe = tmp;
/* Use the global lock for all EC transactions? */
+ tmp = 0;
acpi_evaluate_integer(handle, "_GLK", NULL, &tmp);
ec->global_lock = tmp;
ec->handle = handle;
ec = make_acpi_ec();
if (!ec)
return -ENOMEM;
- if (ec_parse_device(device->handle, 0, ec, NULL) !=
- AE_CTRL_TERMINATE) {
+ }
+ if (ec_parse_device(device->handle, 0, ec, NULL) !=
+ AE_CTRL_TERMINATE) {
kfree(ec);
return -EINVAL;
- }
}
ec->handle = device->handle;
int __init acpi_ec_ecdt_probe(void)
{
- int ret;
acpi_status status;
+ struct acpi_ec *saved_ec = NULL;
struct acpi_table_ecdt *ecdt_ptr;
boot_ec = make_acpi_ec();
/*
* Generate a boot ec context
*/
+ if (dmi_name_in_vendors("Micro-Star") ||
+ dmi_name_in_vendors("Notebook")) {
+ pr_info(PREFIX "Enabling special treatment for EC from MSI.\n");
+ EC_FLAGS_MSI = 1;
+ }
status = acpi_get_table(ACPI_SIG_ECDT, 1,
(struct acpi_table_header **)&ecdt_ptr);
if (ACPI_SUCCESS(status)) {
pr_info(PREFIX "EC description table is found, configuring boot EC\n");
boot_ec->command_addr = ecdt_ptr->control.address;
boot_ec->data_addr = ecdt_ptr->data.address;
- if (dmi_check_system(ec_dmi_table)) {
- /*
- * If the board falls into ec_dmi_table, it means
- * that ECDT table gives the incorrect command/status
- * & data I/O address. Just fix it.
- */
- boot_ec->data_addr = ecdt_ptr->control.address;
- boot_ec->command_addr = ecdt_ptr->data.address;
- }
boot_ec->gpe = ecdt_ptr->gpe;
boot_ec->handle = ACPI_ROOT_OBJECT;
acpi_get_handle(ACPI_ROOT_OBJECT, ecdt_ptr->id, &boot_ec->handle);
+ /* Don't trust ECDT, which comes from ASUSTek */
+ if (!dmi_name_in_vendors("ASUS") && EC_FLAGS_MSI == 0)
+ goto install;
+ saved_ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
+ if (!saved_ec)
+ return -ENOMEM;
+ memcpy(saved_ec, boot_ec, sizeof(struct acpi_ec));
+ /* fall through */
+ }
+ /* This workaround is needed only on some broken machines,
+ * which require early EC, but fail to provide ECDT */
+ printk(KERN_DEBUG PREFIX "Look up EC in DSDT\n");
+ status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device,
+ boot_ec, NULL);
+ /* Check that acpi_get_devices actually find something */
+ if (ACPI_FAILURE(status) || !boot_ec->handle)
+ goto error;
+ if (saved_ec) {
+ /* try to find good ECDT from ASUSTek */
+ if (saved_ec->command_addr != boot_ec->command_addr ||
+ saved_ec->data_addr != boot_ec->data_addr ||
+ saved_ec->gpe != boot_ec->gpe ||
+ saved_ec->handle != boot_ec->handle)
+ pr_info(PREFIX "ASUSTek keeps feeding us with broken "
+ "ECDT tables, which are very hard to workaround. "
+ "Trying to use DSDT EC info instead. Please send "
+ "output of acpidump to linux-acpi@vger.kernel.org\n");
+ kfree(saved_ec);
+ saved_ec = NULL;
} else {
- /* This workaround is needed only on some broken machines,
- * which require early EC, but fail to provide ECDT */
- acpi_handle x;
- printk(KERN_DEBUG PREFIX "Look up EC in DSDT\n");
- status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device,
- boot_ec, NULL);
- /* Check that acpi_get_devices actually find something */
- if (ACPI_FAILURE(status) || !boot_ec->handle)
- goto error;
/* We really need to limit this workaround, the only ASUS,
- * which needs it, has fake EC._INI method, so use it as flag.
- * Keep boot_ec struct as it will be needed soon.
- */
- if (ACPI_FAILURE(acpi_get_handle(boot_ec->handle, "_INI", &x)))
+ * which needs it, has fake EC._INI method, so use it as flag.
+ * Keep boot_ec struct as it will be needed soon.
+ */
+ acpi_handle dummy;
+ if (!dmi_name_in_vendors("ASUS") ||
+ ACPI_FAILURE(acpi_get_handle(boot_ec->handle, "_INI",
+ &dummy)))
return -ENODEV;
}
-
- ret = ec_install_handlers(boot_ec);
- if (!ret) {
+install:
+ if (!ec_install_handlers(boot_ec)) {
first_ec = boot_ec;
return 0;
}
- error:
+error:
kfree(boot_ec);
boot_ec = NULL;
return -ENODEV;
struct acpi_ec *ec = acpi_driver_data(device);
/* Enable use of GPE back */
clear_bit(EC_FLAGS_NO_GPE, &ec->flags);
+ set_bit(EC_FLAGS_GPE_MODE, &ec->flags);
acpi_enable_gpe(NULL, ec->gpe);
return 0;
}
},
};
-static int __init acpi_ec_init(void)
+int __init acpi_ec_init(void)
{
int result = 0;
- if (acpi_disabled)
- return 0;
-
acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir);
if (!acpi_ec_dir)
return -ENODEV;
return result;
}
-subsys_initcall(acpi_ec_init);
-
/* EC driver currently not unloadable */
#if 0
static void __exit acpi_ec_exit(void)