2005-04-16 16:20:36 -06:00
|
|
|
/*
|
2008-09-25 11:00:31 -06:00
|
|
|
* ec.c - ACPI Embedded Controller Driver (v2.1)
|
2005-04-16 16:20:36 -06:00
|
|
|
*
|
2008-09-25 11:00:31 -06:00
|
|
|
* Copyright (C) 2006-2008 Alexey Starikovskiy <astarikovskiy@suse.de>
|
2007-03-07 12:28:00 -07:00
|
|
|
* Copyright (C) 2006 Denis Sadykov <denis.m.sadykov@intel.com>
|
2005-04-16 16:20:36 -06:00
|
|
|
* Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
|
|
|
|
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
|
|
|
|
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
|
|
|
|
*
|
|
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
*
|
|
|
|
* 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.,
|
|
|
|
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
|
|
|
*
|
|
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
*/
|
|
|
|
|
2008-09-25 11:00:31 -06:00
|
|
|
/* Uncomment next line to get verbose printout */
|
2008-01-23 20:34:09 -07:00
|
|
|
/* #define DEBUG */
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <linux/delay.h>
|
|
|
|
#include <linux/proc_fs.h>
|
|
|
|
#include <linux/seq_file.h>
|
2005-03-18 23:10:05 -07:00
|
|
|
#include <linux/interrupt.h>
|
2007-05-29 06:43:02 -06:00
|
|
|
#include <linux/list.h>
|
2008-09-25 11:00:31 -06:00
|
|
|
#include <linux/spinlock.h>
|
2005-04-16 16:20:36 -06:00
|
|
|
#include <asm/io.h>
|
|
|
|
#include <acpi/acpi_bus.h>
|
|
|
|
#include <acpi/acpi_drivers.h>
|
2009-07-06 21:40:19 -06:00
|
|
|
#include <linux/dmi.h>
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
#define ACPI_EC_CLASS "embedded_controller"
|
|
|
|
#define ACPI_EC_DEVICE_NAME "Embedded Controller"
|
|
|
|
#define ACPI_EC_FILE_INFO "info"
|
2007-05-29 06:43:02 -06:00
|
|
|
|
2006-12-07 08:42:16 -07:00
|
|
|
#define PREFIX "ACPI: EC: "
|
2007-05-29 06:42:57 -06:00
|
|
|
|
2006-09-26 09:50:33 -06:00
|
|
|
/* EC status register */
|
2005-04-16 16:20:36 -06:00
|
|
|
#define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */
|
|
|
|
#define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */
|
2005-03-18 23:10:05 -07:00
|
|
|
#define ACPI_EC_FLAG_BURST 0x10 /* burst mode */
|
2005-04-16 16:20:36 -06:00
|
|
|
#define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */
|
2007-05-29 06:42:57 -06:00
|
|
|
|
2006-09-26 09:50:33 -06:00
|
|
|
/* EC commands */
|
2006-12-07 08:42:17 -07:00
|
|
|
enum ec_command {
|
2006-12-07 08:42:17 -07:00
|
|
|
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,
|
2006-12-07 08:42:17 -07:00
|
|
|
};
|
2007-05-29 06:43:02 -06:00
|
|
|
|
2006-12-07 08:42:16 -07:00
|
|
|
#define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */
|
2006-09-26 09:50:33 -06:00
|
|
|
#define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */
|
2009-03-31 22:25:10 -06:00
|
|
|
#define ACPI_EC_CDELAY 10 /* Wait 10us before polling EC */
|
2009-08-29 17:06:14 -06:00
|
|
|
#define ACPI_EC_MSI_UDELAY 550 /* Wait 550us for MSI EC */
|
2006-09-26 09:50:33 -06:00
|
|
|
|
2008-11-09 09:01:06 -07:00
|
|
|
#define ACPI_EC_STORM_THRESHOLD 8 /* number of false interrupts
|
2008-09-25 11:00:31 -06:00
|
|
|
per one transaction */
|
|
|
|
|
2007-10-22 04:18:30 -06:00
|
|
|
enum {
|
|
|
|
EC_FLAGS_QUERY_PENDING, /* Query is pending */
|
2008-09-25 11:00:31 -06:00
|
|
|
EC_FLAGS_GPE_STORM, /* GPE storm detected */
|
|
|
|
EC_FLAGS_HANDLERS_INSTALLED /* Handlers for GPE and
|
|
|
|
* OpReg are installed */
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
2006-09-26 09:50:33 -06:00
|
|
|
|
|
|
|
/* If we find an EC via the ECDT, we need to keep a ptr to its context */
|
2007-03-07 12:28:00 -07:00
|
|
|
/* External interfaces use first EC only, so remember */
|
2007-05-29 06:43:02 -06:00
|
|
|
typedef int (*acpi_ec_query_func) (void *data);
|
|
|
|
|
|
|
|
struct acpi_ec_query_handler {
|
|
|
|
struct list_head node;
|
|
|
|
acpi_ec_query_func func;
|
|
|
|
acpi_handle handle;
|
|
|
|
void *data;
|
|
|
|
u8 query_bit;
|
|
|
|
};
|
|
|
|
|
2008-09-25 14:54:28 -06:00
|
|
|
struct transaction {
|
2008-09-25 11:00:31 -06:00
|
|
|
const u8 *wdata;
|
|
|
|
u8 *rdata;
|
|
|
|
unsigned short irq_count;
|
2008-09-25 14:54:28 -06:00
|
|
|
u8 command;
|
2008-11-11 15:40:19 -07:00
|
|
|
u8 wi;
|
|
|
|
u8 ri;
|
2008-09-25 11:00:31 -06:00
|
|
|
u8 wlen;
|
|
|
|
u8 rlen;
|
2008-11-08 11:42:30 -07:00
|
|
|
bool done;
|
2008-09-25 11:00:31 -06:00
|
|
|
};
|
|
|
|
|
2006-12-19 13:56:12 -07:00
|
|
|
static struct acpi_ec {
|
2006-09-26 09:50:33 -06:00
|
|
|
acpi_handle handle;
|
2006-12-07 08:42:16 -07:00
|
|
|
unsigned long gpe;
|
2006-09-26 09:50:33 -06:00
|
|
|
unsigned long command_addr;
|
|
|
|
unsigned long data_addr;
|
2006-09-26 09:50:33 -06:00
|
|
|
unsigned long global_lock;
|
2007-10-22 04:18:30 -06:00
|
|
|
unsigned long flags;
|
2006-12-07 08:42:16 -07:00
|
|
|
struct mutex lock;
|
2006-09-26 09:50:33 -06:00
|
|
|
wait_queue_head_t wait;
|
2007-05-29 06:43:02 -06:00
|
|
|
struct list_head list;
|
2008-09-25 14:54:28 -06:00
|
|
|
struct transaction *curr;
|
|
|
|
spinlock_t curr_lock;
|
2007-03-07 12:28:00 -07:00
|
|
|
} *boot_ec, *first_ec;
|
2006-09-26 09:50:33 -06:00
|
|
|
|
2009-02-21 10:18:13 -07:00
|
|
|
static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */
|
2009-10-02 10:21:33 -06:00
|
|
|
static int EC_FLAGS_VALIDATE_ECDT; /* ASUStec ECDTs need to be validated */
|
2009-10-02 10:21:40 -06:00
|
|
|
static int EC_FLAGS_SKIP_DSDT_SCAN; /* Not all BIOS survive early DSDT scan */
|
2009-02-21 10:18:13 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* --------------------------------------------------------------------------
|
|
|
|
Transaction Management
|
|
|
|
-------------------------------------------------------------------------- */
|
|
|
|
|
2006-09-26 09:50:33 -06:00
|
|
|
static inline u8 acpi_ec_read_status(struct acpi_ec *ec)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-11-20 17:23:26 -07:00
|
|
|
u8 x = inb(ec->command_addr);
|
2008-01-23 20:33:06 -07:00
|
|
|
pr_debug(PREFIX "---> status = 0x%2.2x\n", x);
|
2007-11-20 17:23:26 -07:00
|
|
|
return x;
|
2005-03-18 23:10:05 -07:00
|
|
|
}
|
|
|
|
|
2006-09-26 09:50:33 -06:00
|
|
|
static inline u8 acpi_ec_read_data(struct acpi_ec *ec)
|
2006-09-26 09:50:33 -06:00
|
|
|
{
|
2007-11-20 17:23:26 -07:00
|
|
|
u8 x = inb(ec->data_addr);
|
2008-01-23 20:33:06 -07:00
|
|
|
pr_debug(PREFIX "---> data = 0x%2.2x\n", x);
|
2008-09-25 11:00:31 -06:00
|
|
|
return x;
|
2006-09-26 09:50:33 -06:00
|
|
|
}
|
|
|
|
|
2006-09-26 09:50:33 -06:00
|
|
|
static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command)
|
2005-07-23 02:08:00 -06:00
|
|
|
{
|
2008-01-23 20:33:06 -07:00
|
|
|
pr_debug(PREFIX "<--- command = 0x%2.2x\n", command);
|
2006-09-26 09:50:33 -06:00
|
|
|
outb(command, ec->command_addr);
|
2005-07-23 02:08:00 -06:00
|
|
|
}
|
|
|
|
|
2006-09-26 09:50:33 -06:00
|
|
|
static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
|
2005-07-23 02:08:00 -06:00
|
|
|
{
|
2008-01-23 20:33:06 -07:00
|
|
|
pr_debug(PREFIX "<--- data = 0x%2.2x\n", data);
|
2006-09-26 09:50:33 -06:00
|
|
|
outb(data, ec->data_addr);
|
2006-09-26 09:50:33 -06:00
|
|
|
}
|
2005-07-23 02:08:00 -06:00
|
|
|
|
2008-09-25 11:00:31 -06:00
|
|
|
static int ec_transaction_done(struct acpi_ec *ec)
|
2006-09-26 09:50:33 -06:00
|
|
|
{
|
2008-09-25 11:00:31 -06:00
|
|
|
unsigned long flags;
|
|
|
|
int ret = 0;
|
2008-09-25 14:54:28 -06:00
|
|
|
spin_lock_irqsave(&ec->curr_lock, flags);
|
2008-11-08 11:42:30 -07:00
|
|
|
if (!ec->curr || ec->curr->done)
|
2008-09-25 11:00:31 -06:00
|
|
|
ret = 1;
|
2008-09-25 14:54:28 -06:00
|
|
|
spin_unlock_irqrestore(&ec->curr_lock, flags);
|
2008-09-25 11:00:31 -06:00
|
|
|
return ret;
|
2005-07-23 02:08:00 -06:00
|
|
|
}
|
2005-03-18 23:10:05 -07:00
|
|
|
|
2008-11-11 15:40:19 -07:00
|
|
|
static void start_transaction(struct acpi_ec *ec)
|
|
|
|
{
|
|
|
|
ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0;
|
|
|
|
ec->curr->done = false;
|
|
|
|
acpi_ec_write_cmd(ec, ec->curr->command);
|
|
|
|
}
|
|
|
|
|
2009-08-29 17:06:14 -06:00
|
|
|
static void advance_transaction(struct acpi_ec *ec, u8 status)
|
2006-09-26 09:50:33 -06:00
|
|
|
{
|
2008-09-25 11:00:31 -06:00
|
|
|
unsigned long flags;
|
2008-09-25 14:54:28 -06:00
|
|
|
spin_lock_irqsave(&ec->curr_lock, flags);
|
|
|
|
if (!ec->curr)
|
2008-09-25 11:00:31 -06:00
|
|
|
goto unlock;
|
2008-11-11 15:40:19 -07:00
|
|
|
if (ec->curr->wlen > ec->curr->wi) {
|
|
|
|
if ((status & ACPI_EC_FLAG_IBF) == 0)
|
|
|
|
acpi_ec_write_data(ec,
|
|
|
|
ec->curr->wdata[ec->curr->wi++]);
|
|
|
|
else
|
2008-11-08 11:42:30 -07:00
|
|
|
goto err;
|
2008-11-11 15:40:19 -07:00
|
|
|
} else if (ec->curr->rlen > ec->curr->ri) {
|
2008-09-25 11:00:31 -06:00
|
|
|
if ((status & ACPI_EC_FLAG_OBF) == 1) {
|
2008-11-11 15:40:19 -07:00
|
|
|
ec->curr->rdata[ec->curr->ri++] = acpi_ec_read_data(ec);
|
|
|
|
if (ec->curr->rlen == ec->curr->ri)
|
2008-11-08 11:42:30 -07:00
|
|
|
ec->curr->done = true;
|
2008-09-25 11:00:31 -06:00
|
|
|
} else
|
2008-11-08 11:42:30 -07:00
|
|
|
goto err;
|
2008-11-11 15:40:19 -07:00
|
|
|
} else if (ec->curr->wlen == ec->curr->wi &&
|
|
|
|
(status & ACPI_EC_FLAG_IBF) == 0)
|
2008-11-08 11:42:30 -07:00
|
|
|
ec->curr->done = true;
|
|
|
|
goto unlock;
|
|
|
|
err:
|
|
|
|
/* false interrupt, state didn't change */
|
2008-11-13 02:00:03 -07:00
|
|
|
if (in_interrupt())
|
|
|
|
++ec->curr->irq_count;
|
2008-09-25 11:00:31 -06:00
|
|
|
unlock:
|
2008-09-25 14:54:28 -06:00
|
|
|
spin_unlock_irqrestore(&ec->curr_lock, flags);
|
2008-03-21 08:07:03 -06:00
|
|
|
}
|
2008-01-23 20:28:34 -07:00
|
|
|
|
2009-12-24 01:34:16 -07:00
|
|
|
static int acpi_ec_sync_query(struct acpi_ec *ec);
|
2008-09-25 11:00:31 -06:00
|
|
|
|
2009-12-24 01:34:16 -07:00
|
|
|
static int ec_check_sci_sync(struct acpi_ec *ec, u8 state)
|
2006-09-26 09:50:33 -06:00
|
|
|
{
|
2008-09-25 11:00:31 -06:00
|
|
|
if (state & ACPI_EC_FLAG_SCI) {
|
|
|
|
if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags))
|
2009-12-24 01:34:16 -07:00
|
|
|
return acpi_ec_sync_query(ec);
|
2008-09-25 11:00:31 -06:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ec_poll(struct acpi_ec *ec)
|
|
|
|
{
|
2009-08-29 17:06:14 -06:00
|
|
|
unsigned long flags;
|
|
|
|
int repeat = 2; /* number of command restarts */
|
|
|
|
while (repeat--) {
|
|
|
|
unsigned long delay = jiffies +
|
|
|
|
msecs_to_jiffies(ACPI_EC_DELAY);
|
|
|
|
do {
|
|
|
|
/* don't sleep with disabled interrupts */
|
|
|
|
if (EC_FLAGS_MSI || irqs_disabled()) {
|
|
|
|
udelay(ACPI_EC_MSI_UDELAY);
|
|
|
|
if (ec_transaction_done(ec))
|
|
|
|
return 0;
|
|
|
|
} else {
|
|
|
|
if (wait_event_timeout(ec->wait,
|
|
|
|
ec_transaction_done(ec),
|
|
|
|
msecs_to_jiffies(1)))
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
advance_transaction(ec, acpi_ec_read_status(ec));
|
|
|
|
} while (time_before(jiffies, delay));
|
2009-10-01 16:53:15 -06:00
|
|
|
if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF)
|
2009-08-29 17:06:14 -06:00
|
|
|
break;
|
|
|
|
pr_debug(PREFIX "controller reset, restart transaction\n");
|
|
|
|
spin_lock_irqsave(&ec->curr_lock, flags);
|
|
|
|
start_transaction(ec);
|
|
|
|
spin_unlock_irqrestore(&ec->curr_lock, flags);
|
2006-12-07 08:42:16 -07:00
|
|
|
}
|
2008-03-21 08:07:15 -06:00
|
|
|
return -ETIME;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2008-09-25 14:54:28 -06:00
|
|
|
static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
|
2009-08-29 17:06:14 -06:00
|
|
|
struct transaction *t)
|
2005-07-23 02:08:00 -06:00
|
|
|
{
|
2008-09-25 11:00:31 -06:00
|
|
|
unsigned long tmp;
|
|
|
|
int ret = 0;
|
2009-02-21 10:18:13 -07:00
|
|
|
if (EC_FLAGS_MSI)
|
2009-08-29 17:06:14 -06:00
|
|
|
udelay(ACPI_EC_MSI_UDELAY);
|
2008-09-25 11:00:31 -06:00
|
|
|
/* start transaction */
|
2008-09-25 14:54:28 -06:00
|
|
|
spin_lock_irqsave(&ec->curr_lock, tmp);
|
2008-09-25 11:00:31 -06:00
|
|
|
/* following two actions should be kept atomic */
|
2008-09-25 14:54:28 -06:00
|
|
|
ec->curr = t;
|
2008-11-11 15:40:19 -07:00
|
|
|
start_transaction(ec);
|
2008-09-25 14:54:28 -06:00
|
|
|
if (ec->curr->command == ACPI_EC_COMMAND_QUERY)
|
2007-10-22 04:18:30 -06:00
|
|
|
clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
|
2008-09-25 14:54:28 -06:00
|
|
|
spin_unlock_irqrestore(&ec->curr_lock, tmp);
|
2009-08-29 17:06:14 -06:00
|
|
|
ret = ec_poll(ec);
|
2008-09-25 14:54:28 -06:00
|
|
|
spin_lock_irqsave(&ec->curr_lock, tmp);
|
|
|
|
ec->curr = NULL;
|
|
|
|
spin_unlock_irqrestore(&ec->curr_lock, tmp);
|
2008-09-25 11:00:31 -06:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ec_check_ibf0(struct acpi_ec *ec)
|
|
|
|
{
|
|
|
|
u8 status = acpi_ec_read_status(ec);
|
|
|
|
return (status & ACPI_EC_FLAG_IBF) == 0;
|
2005-07-23 02:08:00 -06:00
|
|
|
}
|
|
|
|
|
2008-10-15 16:02:33 -06:00
|
|
|
static int ec_wait_ibf0(struct acpi_ec *ec)
|
|
|
|
{
|
|
|
|
unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);
|
|
|
|
/* interrupt wait manually if GPE mode is not active */
|
|
|
|
while (time_before(jiffies, delay))
|
2009-08-29 17:06:14 -06:00
|
|
|
if (wait_event_timeout(ec->wait, ec_check_ibf0(ec),
|
|
|
|
msecs_to_jiffies(1)))
|
2008-10-15 16:02:33 -06:00
|
|
|
return 0;
|
|
|
|
return -ETIME;
|
2005-07-23 02:08:00 -06:00
|
|
|
}
|
|
|
|
|
2009-08-29 17:06:14 -06:00
|
|
|
static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2006-09-05 10:12:24 -06:00
|
|
|
int status;
|
2005-08-11 15:32:05 -06:00
|
|
|
u32 glk;
|
2008-09-25 14:54:28 -06:00
|
|
|
if (!ec || (!t) || (t->wlen && !t->wdata) || (t->rlen && !t->rdata))
|
2006-06-26 22:41:40 -06:00
|
|
|
return -EINVAL;
|
2008-09-25 14:54:28 -06:00
|
|
|
if (t->rdata)
|
|
|
|
memset(t->rdata, 0, t->rlen);
|
2006-12-07 08:42:17 -07:00
|
|
|
mutex_lock(&ec->lock);
|
2006-09-26 09:50:33 -06:00
|
|
|
if (ec->global_lock) {
|
2005-04-16 16:20:36 -06:00
|
|
|
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
|
2007-02-15 13:16:18 -07:00
|
|
|
if (ACPI_FAILURE(status)) {
|
2008-09-25 11:00:31 -06:00
|
|
|
status = -ENODEV;
|
|
|
|
goto unlock;
|
2007-02-15 13:16:18 -07:00
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2008-10-15 16:02:33 -06:00
|
|
|
if (ec_wait_ibf0(ec)) {
|
2007-11-20 17:23:26 -07:00
|
|
|
pr_err(PREFIX "input buffer is not empty, "
|
|
|
|
"aborting transaction\n");
|
2008-09-25 11:00:31 -06:00
|
|
|
status = -ETIME;
|
2005-03-18 23:10:05 -07:00
|
|
|
goto end;
|
2005-08-09 23:40:00 -06:00
|
|
|
}
|
2009-12-24 01:34:16 -07:00
|
|
|
pr_debug(PREFIX "transaction start\n");
|
|
|
|
/* disable GPE during transaction if storm is detected */
|
|
|
|
if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
|
2010-02-23 16:52:08 -07:00
|
|
|
/*
|
|
|
|
* It has to be disabled at the hardware level regardless of the
|
|
|
|
* GPE reference counting, so that it doesn't trigger.
|
|
|
|
*/
|
2010-02-17 15:41:07 -07:00
|
|
|
acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);
|
2009-12-24 01:34:16 -07:00
|
|
|
}
|
|
|
|
|
2009-08-29 17:06:14 -06:00
|
|
|
status = acpi_ec_transaction_unlocked(ec, t);
|
2009-12-24 01:34:16 -07:00
|
|
|
|
|
|
|
/* check if we received SCI during transaction */
|
|
|
|
ec_check_sci_sync(ec, acpi_ec_read_status(ec));
|
|
|
|
if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
|
2009-12-30 05:53:10 -07:00
|
|
|
msleep(1);
|
2010-02-23 16:52:08 -07:00
|
|
|
/*
|
|
|
|
* 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.
|
|
|
|
*/
|
2010-02-17 15:41:07 -07:00
|
|
|
acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);
|
2009-12-24 01:34:16 -07:00
|
|
|
} else if (t->irq_count > ACPI_EC_STORM_THRESHOLD) {
|
|
|
|
pr_info(PREFIX "GPE storm detected, "
|
|
|
|
"transactions will use polling mode\n");
|
|
|
|
set_bit(EC_FLAGS_GPE_STORM, &ec->flags);
|
|
|
|
}
|
2009-12-30 05:53:10 -07:00
|
|
|
pr_debug(PREFIX "transaction end\n");
|
2008-09-25 11:00:31 -06:00
|
|
|
end:
|
2006-09-26 09:50:33 -06:00
|
|
|
if (ec->global_lock)
|
2005-04-16 16:20:36 -06:00
|
|
|
acpi_release_global_lock(glk);
|
2008-09-25 11:00:31 -06:00
|
|
|
unlock:
|
2006-12-07 08:42:17 -07:00
|
|
|
mutex_unlock(&ec->lock);
|
2006-06-26 22:41:40 -06:00
|
|
|
return status;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2008-12-09 12:45:30 -07:00
|
|
|
static int acpi_ec_burst_enable(struct acpi_ec *ec)
|
2007-03-07 12:28:00 -07:00
|
|
|
{
|
|
|
|
u8 d;
|
2008-09-25 14:54:28 -06:00
|
|
|
struct transaction t = {.command = ACPI_EC_BURST_ENABLE,
|
|
|
|
.wdata = NULL, .rdata = &d,
|
|
|
|
.wlen = 0, .rlen = 1};
|
|
|
|
|
2009-08-29 17:06:14 -06:00
|
|
|
return acpi_ec_transaction(ec, &t);
|
2007-03-07 12:28:00 -07:00
|
|
|
}
|
|
|
|
|
2008-12-09 12:45:30 -07:00
|
|
|
static int acpi_ec_burst_disable(struct acpi_ec *ec)
|
2007-03-07 12:28:00 -07:00
|
|
|
{
|
2008-09-25 14:54:28 -06:00
|
|
|
struct transaction t = {.command = ACPI_EC_BURST_DISABLE,
|
|
|
|
.wdata = NULL, .rdata = NULL,
|
|
|
|
.wlen = 0, .rlen = 0};
|
|
|
|
|
2008-09-25 11:00:31 -06:00
|
|
|
return (acpi_ec_read_status(ec) & ACPI_EC_FLAG_BURST) ?
|
2009-08-29 17:06:14 -06:00
|
|
|
acpi_ec_transaction(ec, &t) : 0;
|
2007-03-07 12:28:00 -07:00
|
|
|
}
|
|
|
|
|
2006-12-07 08:42:17 -07:00
|
|
|
static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data)
|
2006-09-26 09:50:33 -06:00
|
|
|
{
|
|
|
|
int result;
|
|
|
|
u8 d;
|
2008-09-25 14:54:28 -06:00
|
|
|
struct transaction t = {.command = ACPI_EC_COMMAND_READ,
|
|
|
|
.wdata = &address, .rdata = &d,
|
|
|
|
.wlen = 1, .rlen = 1};
|
2006-09-26 09:50:33 -06:00
|
|
|
|
2009-08-29 17:06:14 -06:00
|
|
|
result = acpi_ec_transaction(ec, &t);
|
2006-09-26 09:50:33 -06:00
|
|
|
*data = d;
|
|
|
|
return result;
|
|
|
|
}
|
2006-09-26 09:50:33 -06:00
|
|
|
|
2006-09-26 09:50:33 -06:00
|
|
|
static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)
|
|
|
|
{
|
2006-12-07 08:42:17 -07:00
|
|
|
u8 wdata[2] = { address, data };
|
2008-09-25 14:54:28 -06:00
|
|
|
struct transaction t = {.command = ACPI_EC_COMMAND_WRITE,
|
|
|
|
.wdata = wdata, .rdata = NULL,
|
|
|
|
.wlen = 2, .rlen = 0};
|
|
|
|
|
2009-08-29 17:06:14 -06:00
|
|
|
return acpi_ec_transaction(ec, &t);
|
2006-09-26 09:50:33 -06:00
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* Externally callable EC access functions. For now, assume 1 EC only
|
|
|
|
*/
|
2007-03-07 12:28:00 -07:00
|
|
|
int ec_burst_enable(void)
|
|
|
|
{
|
|
|
|
if (!first_ec)
|
|
|
|
return -ENODEV;
|
2007-03-07 12:28:00 -07:00
|
|
|
return acpi_ec_burst_enable(first_ec);
|
2007-03-07 12:28:00 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(ec_burst_enable);
|
|
|
|
|
|
|
|
int ec_burst_disable(void)
|
|
|
|
{
|
|
|
|
if (!first_ec)
|
|
|
|
return -ENODEV;
|
2007-03-07 12:28:00 -07:00
|
|
|
return acpi_ec_burst_disable(first_ec);
|
2007-03-07 12:28:00 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(ec_burst_disable);
|
|
|
|
|
2006-12-07 08:42:17 -07:00
|
|
|
int ec_read(u8 addr, u8 * val)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
int err;
|
2006-09-26 09:50:33 -06:00
|
|
|
u8 temp_data;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
if (!first_ec)
|
|
|
|
return -ENODEV;
|
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
err = acpi_ec_read(first_ec, addr, &temp_data);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
if (!err) {
|
|
|
|
*val = temp_data;
|
|
|
|
return 0;
|
2005-08-11 15:32:05 -06:00
|
|
|
} else
|
2005-04-16 16:20:36 -06:00
|
|
|
return err;
|
|
|
|
}
|
2005-08-11 15:32:05 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
EXPORT_SYMBOL(ec_read);
|
|
|
|
|
2005-08-11 15:32:05 -06:00
|
|
|
int ec_write(u8 addr, u8 val)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
if (!first_ec)
|
|
|
|
return -ENODEV;
|
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
err = acpi_ec_write(first_ec, addr, val);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
2005-08-11 15:32:05 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
EXPORT_SYMBOL(ec_write);
|
|
|
|
|
2006-10-26 23:47:34 -06:00
|
|
|
int ec_transaction(u8 command,
|
2007-03-07 16:29:35 -07:00
|
|
|
const u8 * wdata, unsigned wdata_len,
|
2007-05-04 06:16:19 -06:00
|
|
|
u8 * rdata, unsigned rdata_len,
|
|
|
|
int force_poll)
|
2005-07-23 02:08:00 -06:00
|
|
|
{
|
2008-09-25 14:54:28 -06:00
|
|
|
struct transaction t = {.command = command,
|
|
|
|
.wdata = wdata, .rdata = rdata,
|
|
|
|
.wlen = wdata_len, .rlen = rdata_len};
|
2006-09-05 10:12:24 -06:00
|
|
|
if (!first_ec)
|
|
|
|
return -ENODEV;
|
2005-07-23 02:08:00 -06:00
|
|
|
|
2009-08-29 17:06:14 -06:00
|
|
|
return acpi_ec_transaction(first_ec, &t);
|
2005-07-23 02:08:00 -06:00
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-10-03 20:49:00 -06:00
|
|
|
EXPORT_SYMBOL(ec_transaction);
|
|
|
|
|
2009-12-24 01:34:16 -07:00
|
|
|
static int acpi_ec_query_unlocked(struct acpi_ec *ec, u8 * data)
|
2006-09-26 09:50:33 -06:00
|
|
|
{
|
|
|
|
int result;
|
2006-12-07 08:42:17 -07:00
|
|
|
u8 d;
|
2008-09-25 14:54:28 -06:00
|
|
|
struct transaction t = {.command = ACPI_EC_COMMAND_QUERY,
|
|
|
|
.wdata = NULL, .rdata = &d,
|
|
|
|
.wlen = 0, .rlen = 1};
|
2006-12-07 08:42:17 -07:00
|
|
|
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).
|
|
|
|
*/
|
2009-12-24 01:34:16 -07:00
|
|
|
result = acpi_ec_transaction_unlocked(ec, &t);
|
2006-12-07 08:42:17 -07:00
|
|
|
if (result)
|
|
|
|
return result;
|
|
|
|
if (!d)
|
|
|
|
return -ENODATA;
|
|
|
|
*data = d;
|
|
|
|
return 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
|
|
Event Management
|
|
|
|
-------------------------------------------------------------------------- */
|
2007-05-29 06:43:02 -06:00
|
|
|
int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
|
|
|
|
acpi_handle handle, acpi_ec_query_func func,
|
|
|
|
void *data)
|
|
|
|
{
|
|
|
|
struct acpi_ec_query_handler *handler =
|
|
|
|
kzalloc(sizeof(struct acpi_ec_query_handler), GFP_KERNEL);
|
|
|
|
if (!handler)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
handler->query_bit = query_bit;
|
|
|
|
handler->handle = handle;
|
|
|
|
handler->func = func;
|
|
|
|
handler->data = data;
|
|
|
|
mutex_lock(&ec->lock);
|
2007-09-26 09:43:22 -06:00
|
|
|
list_add(&handler->node, &ec->list);
|
2007-05-29 06:43:02 -06:00
|
|
|
mutex_unlock(&ec->lock);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL_GPL(acpi_ec_add_query_handler);
|
|
|
|
|
|
|
|
void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit)
|
|
|
|
{
|
2007-10-24 10:26:00 -06:00
|
|
|
struct acpi_ec_query_handler *handler, *tmp;
|
2007-05-29 06:43:02 -06:00
|
|
|
mutex_lock(&ec->lock);
|
2007-10-24 10:26:00 -06:00
|
|
|
list_for_each_entry_safe(handler, tmp, &ec->list, node) {
|
2007-05-29 06:43:02 -06:00
|
|
|
if (query_bit == handler->query_bit) {
|
|
|
|
list_del(&handler->node);
|
|
|
|
kfree(handler);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
mutex_unlock(&ec->lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2009-12-24 01:34:16 -07:00
|
|
|
static void acpi_ec_run(void *cxt)
|
2005-07-23 02:08:00 -06:00
|
|
|
{
|
2009-12-24 01:34:16 -07:00
|
|
|
struct acpi_ec_query_handler *handler = cxt;
|
|
|
|
if (!handler)
|
2006-12-07 08:42:16 -07:00
|
|
|
return;
|
2009-12-24 01:34:16 -07:00
|
|
|
pr_debug(PREFIX "start query execution\n");
|
|
|
|
if (handler->func)
|
|
|
|
handler->func(handler->data);
|
|
|
|
else if (handler->handle)
|
|
|
|
acpi_evaluate_object(handler->handle, NULL, NULL, NULL);
|
|
|
|
pr_debug(PREFIX "stop query execution\n");
|
|
|
|
kfree(handler);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int acpi_ec_sync_query(struct acpi_ec *ec)
|
|
|
|
{
|
|
|
|
u8 value = 0;
|
|
|
|
int status;
|
|
|
|
struct acpi_ec_query_handler *handler, *copy;
|
|
|
|
if ((status = acpi_ec_query_unlocked(ec, &value)))
|
|
|
|
return status;
|
2007-05-29 06:43:02 -06:00
|
|
|
list_for_each_entry(handler, &ec->list, node) {
|
|
|
|
if (value == handler->query_bit) {
|
|
|
|
/* have custom handler for this bit */
|
2009-12-24 01:34:16 -07:00
|
|
|
copy = kmalloc(sizeof(*handler), GFP_KERNEL);
|
|
|
|
if (!copy)
|
|
|
|
return -ENOMEM;
|
|
|
|
memcpy(copy, handler, sizeof(*copy));
|
|
|
|
pr_debug(PREFIX "push query execution (0x%2x) on queue\n", value);
|
2009-12-30 05:53:03 -07:00
|
|
|
return acpi_os_execute((copy->func) ?
|
|
|
|
OSL_NOTIFY_HANDLER : OSL_GPE_HANDLER,
|
2009-12-24 01:34:16 -07:00
|
|
|
acpi_ec_run, copy);
|
2007-05-29 06:43:02 -06:00
|
|
|
}
|
|
|
|
}
|
2009-12-24 01:34:16 -07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void acpi_ec_gpe_query(void *ec_cxt)
|
|
|
|
{
|
|
|
|
struct acpi_ec *ec = ec_cxt;
|
|
|
|
if (!ec)
|
|
|
|
return;
|
|
|
|
mutex_lock(&ec->lock);
|
|
|
|
acpi_ec_sync_query(ec);
|
2007-05-29 06:43:02 -06:00
|
|
|
mutex_unlock(&ec->lock);
|
2005-07-23 02:08:00 -06:00
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2009-12-24 01:34:16 -07:00
|
|
|
static void acpi_ec_gpe_query(void *ec_cxt);
|
|
|
|
|
|
|
|
static int ec_check_sci(struct acpi_ec *ec, u8 state)
|
|
|
|
{
|
|
|
|
if (state & ACPI_EC_FLAG_SCI) {
|
|
|
|
if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) {
|
|
|
|
pr_debug(PREFIX "push gpe query to the queue\n");
|
|
|
|
return acpi_os_execute(OSL_NOTIFY_HANDLER,
|
|
|
|
acpi_ec_gpe_query, ec);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-08-11 15:32:05 -06:00
|
|
|
static u32 acpi_ec_gpe_handler(void *data)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec = data;
|
2007-05-04 06:16:19 -06:00
|
|
|
|
2007-11-20 17:23:26 -07:00
|
|
|
pr_debug(PREFIX "~~~> interrupt\n");
|
2008-09-25 11:00:31 -06:00
|
|
|
|
2009-12-24 01:34:16 -07:00
|
|
|
advance_transaction(ec, acpi_ec_read_status(ec));
|
|
|
|
if (ec_transaction_done(ec) &&
|
|
|
|
(acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) == 0) {
|
2009-08-29 17:06:14 -06:00
|
|
|
wake_up(&ec->wait);
|
2009-12-24 01:34:16 -07:00
|
|
|
ec_check_sci(ec, acpi_ec_read_status(ec));
|
|
|
|
}
|
2008-09-25 11:00:31 -06:00
|
|
|
return ACPI_INTERRUPT_HANDLED;
|
2008-03-21 08:07:03 -06:00
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* --------------------------------------------------------------------------
|
|
|
|
Address Space Management
|
|
|
|
-------------------------------------------------------------------------- */
|
|
|
|
|
|
|
|
static acpi_status
|
2007-05-29 06:42:52 -06:00
|
|
|
acpi_ec_space_handler(u32 function, acpi_physical_address address,
|
|
|
|
u32 bits, acpi_integer *value,
|
2005-08-11 15:32:05 -06:00
|
|
|
void *handler_context, void *region_context)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec = handler_context;
|
2008-01-10 16:42:51 -07:00
|
|
|
int result = 0, i;
|
2007-05-29 06:42:52 -06:00
|
|
|
u8 temp = 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
if ((address > 0xFF) || !value || !handler_context)
|
2006-06-26 22:41:40 -06:00
|
|
|
return AE_BAD_PARAMETER;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-05-29 06:42:52 -06:00
|
|
|
if (function != ACPI_READ && function != ACPI_WRITE)
|
2006-06-26 22:41:40 -06:00
|
|
|
return AE_BAD_PARAMETER;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-05-29 06:42:52 -06:00
|
|
|
if (bits != 8 && acpi_strict)
|
|
|
|
return AE_BAD_PARAMETER;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2009-08-28 13:29:44 -06:00
|
|
|
if (EC_FLAGS_MSI)
|
|
|
|
acpi_ec_burst_enable(ec);
|
2008-01-10 16:42:57 -07:00
|
|
|
|
2008-01-10 16:42:51 -07:00
|
|
|
if (function == ACPI_READ) {
|
|
|
|
result = acpi_ec_read(ec, address, &temp);
|
|
|
|
*value = temp;
|
|
|
|
} else {
|
|
|
|
temp = 0xff & (*value);
|
|
|
|
result = acpi_ec_write(ec, address, temp);
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 8; unlikely(bits - i > 0); i += 8) {
|
|
|
|
++address;
|
2007-05-29 06:42:52 -06:00
|
|
|
if (function == ACPI_READ) {
|
|
|
|
result = acpi_ec_read(ec, address, &temp);
|
|
|
|
(*value) |= ((acpi_integer)temp) << i;
|
|
|
|
} else {
|
|
|
|
temp = 0xff & ((*value) >> i);
|
|
|
|
result = acpi_ec_write(ec, address, temp);
|
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2009-08-28 13:29:44 -06:00
|
|
|
if (EC_FLAGS_MSI)
|
|
|
|
acpi_ec_burst_disable(ec);
|
2008-01-10 16:42:57 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
switch (result) {
|
|
|
|
case -EINVAL:
|
2006-06-26 22:41:40 -06:00
|
|
|
return AE_BAD_PARAMETER;
|
2005-04-16 16:20:36 -06:00
|
|
|
break;
|
|
|
|
case -ENODEV:
|
2006-06-26 22:41:40 -06:00
|
|
|
return AE_NOT_FOUND;
|
2005-04-16 16:20:36 -06:00
|
|
|
break;
|
|
|
|
case -ETIME:
|
2006-06-26 22:41:40 -06:00
|
|
|
return AE_TIME;
|
2005-04-16 16:20:36 -06:00
|
|
|
break;
|
|
|
|
default:
|
2006-06-26 22:41:40 -06:00
|
|
|
return AE_OK;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
|
|
FS Interface (/proc)
|
|
|
|
-------------------------------------------------------------------------- */
|
|
|
|
|
2005-08-11 15:32:05 -06:00
|
|
|
static struct proc_dir_entry *acpi_ec_dir;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-08-11 15:32:05 -06:00
|
|
|
static int acpi_ec_read_info(struct seq_file *seq, void *offset)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec = seq->private;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
if (!ec)
|
|
|
|
goto end;
|
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
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",
|
2006-09-26 09:50:33 -06:00
|
|
|
ec->global_lock ? "yes" : "no");
|
2005-08-11 15:32:05 -06:00
|
|
|
end:
|
2006-06-26 22:41:40 -06:00
|
|
|
return 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static int acpi_ec_info_open_fs(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
return single_open(file, acpi_ec_read_info, PDE(inode)->data);
|
|
|
|
}
|
|
|
|
|
2009-01-11 16:07:55 -07:00
|
|
|
static const struct file_operations acpi_ec_info_ops = {
|
2005-08-11 15:32:05 -06:00
|
|
|
.open = acpi_ec_info_open_fs,
|
|
|
|
.read = seq_read,
|
|
|
|
.llseek = seq_lseek,
|
|
|
|
.release = single_release,
|
2005-04-16 16:20:36 -06:00
|
|
|
.owner = THIS_MODULE,
|
|
|
|
};
|
|
|
|
|
2005-08-11 15:32:05 -06:00
|
|
|
static int acpi_ec_add_fs(struct acpi_device *device)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2005-08-11 15:32:05 -06:00
|
|
|
struct proc_dir_entry *entry = NULL;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
if (!acpi_device_dir(device)) {
|
|
|
|
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
|
2005-08-11 15:32:05 -06:00
|
|
|
acpi_ec_dir);
|
2005-04-16 16:20:36 -06:00
|
|
|
if (!acpi_device_dir(device))
|
2006-06-26 22:41:40 -06:00
|
|
|
return -ENODEV;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2008-04-29 02:02:27 -06:00
|
|
|
entry = proc_create_data(ACPI_EC_FILE_INFO, S_IRUGO,
|
|
|
|
acpi_device_dir(device),
|
|
|
|
&acpi_ec_info_ops, acpi_driver_data(device));
|
2005-04-16 16:20:36 -06:00
|
|
|
if (!entry)
|
2006-06-26 22:41:40 -06:00
|
|
|
return -ENODEV;
|
|
|
|
return 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2005-08-11 15:32:05 -06:00
|
|
|
static int acpi_ec_remove_fs(struct acpi_device *device)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2006-06-26 22:41:40 -06:00
|
|
|
return 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
|
|
Driver Interface
|
|
|
|
-------------------------------------------------------------------------- */
|
2007-03-07 12:28:00 -07:00
|
|
|
static acpi_status
|
|
|
|
ec_parse_io_ports(struct acpi_resource *resource, void *context);
|
|
|
|
|
|
|
|
static struct acpi_ec *make_acpi_ec(void)
|
|
|
|
{
|
|
|
|
struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL);
|
|
|
|
if (!ec)
|
|
|
|
return NULL;
|
2007-10-22 04:18:30 -06:00
|
|
|
ec->flags = 1 << EC_FLAGS_QUERY_PENDING;
|
2007-03-07 12:28:00 -07:00
|
|
|
mutex_init(&ec->lock);
|
|
|
|
init_waitqueue_head(&ec->wait);
|
2007-05-29 06:43:02 -06:00
|
|
|
INIT_LIST_HEAD(&ec->list);
|
2008-09-25 14:54:28 -06:00
|
|
|
spin_lock_init(&ec->curr_lock);
|
2007-03-07 12:28:00 -07:00
|
|
|
return ec;
|
|
|
|
}
|
2007-05-29 06:43:02 -06:00
|
|
|
|
2007-08-13 23:03:42 -06:00
|
|
|
static acpi_status
|
|
|
|
acpi_ec_register_query_methods(acpi_handle handle, u32 level,
|
|
|
|
void *context, void **return_value)
|
|
|
|
{
|
2008-12-16 01:46:12 -07:00
|
|
|
char node_name[5];
|
|
|
|
struct acpi_buffer buffer = { sizeof(node_name), node_name };
|
2007-08-13 23:03:42 -06:00
|
|
|
struct acpi_ec *ec = context;
|
|
|
|
int value = 0;
|
2008-12-16 01:46:12 -07:00
|
|
|
acpi_status status;
|
|
|
|
|
|
|
|
status = acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer);
|
|
|
|
|
|
|
|
if (ACPI_SUCCESS(status) && sscanf(node_name, "_Q%x", &value) == 1) {
|
2007-08-13 23:03:42 -06:00
|
|
|
acpi_ec_add_query_handler(ec, value, handle, NULL, NULL);
|
|
|
|
}
|
|
|
|
return AE_OK;
|
|
|
|
}
|
|
|
|
|
2007-08-03 15:52:48 -06:00
|
|
|
static acpi_status
|
|
|
|
ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
|
2007-05-29 06:43:02 -06:00
|
|
|
{
|
2007-08-03 15:52:48 -06:00
|
|
|
acpi_status status;
|
2008-11-03 12:26:40 -07:00
|
|
|
unsigned long long tmp = 0;
|
2007-08-03 15:52:48 -06:00
|
|
|
|
|
|
|
struct acpi_ec *ec = context;
|
2009-03-31 23:33:15 -06:00
|
|
|
|
|
|
|
/* clear addr values, ec_parse_io_ports depend on it */
|
|
|
|
ec->command_addr = ec->data_addr = 0;
|
|
|
|
|
2007-08-03 15:52:48 -06:00
|
|
|
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
|
|
|
|
ec_parse_io_ports, ec);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
return status;
|
2007-05-29 06:43:02 -06:00
|
|
|
|
|
|
|
/* Get GPE bit assignment (EC events). */
|
|
|
|
/* TODO: Add support for _GPE returning a package */
|
2008-10-10 00:22:59 -06:00
|
|
|
status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
|
2007-08-03 15:52:48 -06:00
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
return status;
|
2008-10-10 00:22:59 -06:00
|
|
|
ec->gpe = tmp;
|
2007-05-29 06:43:02 -06:00
|
|
|
/* Use the global lock for all EC transactions? */
|
2008-11-03 12:26:40 -07:00
|
|
|
tmp = 0;
|
2008-10-10 00:22:59 -06:00
|
|
|
acpi_evaluate_integer(handle, "_GLK", NULL, &tmp);
|
|
|
|
ec->global_lock = tmp;
|
2007-05-29 06:43:02 -06:00
|
|
|
ec->handle = handle;
|
2007-08-03 15:52:48 -06:00
|
|
|
return AE_CTRL_TERMINATE;
|
2007-05-29 06:43:02 -06:00
|
|
|
}
|
|
|
|
|
2009-06-22 14:41:30 -06:00
|
|
|
static int ec_install_handlers(struct acpi_ec *ec)
|
|
|
|
{
|
|
|
|
acpi_status status;
|
|
|
|
if (test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags))
|
|
|
|
return 0;
|
|
|
|
status = acpi_install_gpe_handler(NULL, ec->gpe,
|
|
|
|
ACPI_GPE_EDGE_TRIGGERED,
|
|
|
|
&acpi_ec_gpe_handler, ec);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
return -ENODEV;
|
2010-02-17 15:41:07 -07:00
|
|
|
|
|
|
|
acpi_enable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
|
2009-06-22 14:41:30 -06:00
|
|
|
status = acpi_install_address_space_handler(ec->handle,
|
|
|
|
ACPI_ADR_SPACE_EC,
|
|
|
|
&acpi_ec_space_handler,
|
|
|
|
NULL, ec);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
if (status == AE_NOT_FOUND) {
|
|
|
|
/*
|
|
|
|
* Maybe OS fails in evaluating the _REG object.
|
|
|
|
* The AE_NOT_FOUND error will be ignored and OS
|
|
|
|
* continue to initialize EC.
|
|
|
|
*/
|
|
|
|
printk(KERN_ERR "Fail in evaluating the _REG object"
|
|
|
|
" of EC device. Broken bios is suspected.\n");
|
|
|
|
} else {
|
|
|
|
acpi_remove_gpe_handler(NULL, ec->gpe,
|
|
|
|
&acpi_ec_gpe_handler);
|
2010-02-17 15:41:07 -07:00
|
|
|
acpi_disable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
|
2009-06-22 14:41:30 -06:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
set_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-09-05 17:56:38 -06:00
|
|
|
static void ec_remove_handlers(struct acpi_ec *ec)
|
|
|
|
{
|
2010-02-17 15:41:07 -07:00
|
|
|
acpi_disable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
|
2007-09-05 17:56:38 -06:00
|
|
|
if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle,
|
|
|
|
ACPI_ADR_SPACE_EC, &acpi_ec_space_handler)))
|
2007-11-20 17:23:26 -07:00
|
|
|
pr_err(PREFIX "failed to remove space handler\n");
|
2007-09-05 17:56:38 -06:00
|
|
|
if (ACPI_FAILURE(acpi_remove_gpe_handler(NULL, ec->gpe,
|
|
|
|
&acpi_ec_gpe_handler)))
|
2007-11-20 17:23:26 -07:00
|
|
|
pr_err(PREFIX "failed to remove gpe handler\n");
|
2008-09-25 11:00:31 -06:00
|
|
|
clear_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags);
|
2007-09-05 17:56:38 -06:00
|
|
|
}
|
|
|
|
|
2006-09-26 09:50:33 -06:00
|
|
|
static int acpi_ec_add(struct acpi_device *device)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2006-09-26 09:50:33 -06:00
|
|
|
struct acpi_ec *ec = NULL;
|
2009-06-22 14:41:35 -06:00
|
|
|
int ret;
|
2005-07-23 02:08:00 -06:00
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
|
|
|
|
strcpy(acpi_device_class(device), ACPI_EC_CLASS);
|
|
|
|
|
2007-09-05 17:56:38 -06:00
|
|
|
/* Check for boot EC */
|
2008-03-24 14:22:36 -06:00
|
|
|
if (boot_ec &&
|
|
|
|
(boot_ec->handle == device->handle ||
|
|
|
|
boot_ec->handle == ACPI_ROOT_OBJECT)) {
|
|
|
|
ec = boot_ec;
|
|
|
|
boot_ec = NULL;
|
|
|
|
} else {
|
|
|
|
ec = make_acpi_ec();
|
|
|
|
if (!ec)
|
|
|
|
return -ENOMEM;
|
2009-03-31 23:33:15 -06:00
|
|
|
}
|
|
|
|
if (ec_parse_device(device->handle, 0, ec, NULL) !=
|
|
|
|
AE_CTRL_TERMINATE) {
|
2008-03-24 14:22:36 -06:00
|
|
|
kfree(ec);
|
|
|
|
return -EINVAL;
|
2007-09-05 17:56:38 -06:00
|
|
|
}
|
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
ec->handle = device->handle;
|
2008-03-24 14:22:36 -06:00
|
|
|
|
|
|
|
/* Find and register all query methods */
|
|
|
|
acpi_walk_namespace(ACPI_TYPE_METHOD, ec->handle, 1,
|
2009-11-12 19:06:08 -07:00
|
|
|
acpi_ec_register_query_methods, NULL, ec, NULL);
|
2008-03-24 14:22:36 -06:00
|
|
|
|
2007-09-05 17:56:38 -06:00
|
|
|
if (!first_ec)
|
|
|
|
first_ec = ec;
|
2008-09-22 15:37:34 -06:00
|
|
|
device->driver_data = ec;
|
2007-03-07 12:28:00 -07:00
|
|
|
acpi_ec_add_fs(device);
|
2007-11-20 17:23:26 -07:00
|
|
|
pr_info(PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n",
|
2007-09-05 17:56:38 -06:00
|
|
|
ec->gpe, ec->command_addr, ec->data_addr);
|
2009-06-22 14:41:30 -06:00
|
|
|
|
|
|
|
ret = ec_install_handlers(ec);
|
|
|
|
|
|
|
|
/* EC is fully operational, allow queries */
|
|
|
|
clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
|
|
|
|
return ret;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2005-08-11 15:32:05 -06:00
|
|
|
static int acpi_ec_remove(struct acpi_device *device, int type)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec;
|
2007-07-29 09:00:37 -06:00
|
|
|
struct acpi_ec_query_handler *handler, *tmp;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
if (!device)
|
2006-06-26 22:41:40 -06:00
|
|
|
return -EINVAL;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
ec = acpi_driver_data(device);
|
2009-06-22 14:41:40 -06:00
|
|
|
ec_remove_handlers(ec);
|
2007-05-29 06:43:02 -06:00
|
|
|
mutex_lock(&ec->lock);
|
2007-07-29 09:00:37 -06:00
|
|
|
list_for_each_entry_safe(handler, tmp, &ec->list, node) {
|
2007-05-29 06:43:02 -06:00
|
|
|
list_del(&handler->node);
|
|
|
|
kfree(handler);
|
|
|
|
}
|
|
|
|
mutex_unlock(&ec->lock);
|
2005-04-16 16:20:36 -06:00
|
|
|
acpi_ec_remove_fs(device);
|
2008-09-22 15:37:34 -06:00
|
|
|
device->driver_data = NULL;
|
2007-03-07 12:28:00 -07:00
|
|
|
if (ec == first_ec)
|
2007-03-07 12:28:00 -07:00
|
|
|
first_ec = NULL;
|
2007-09-05 17:56:38 -06:00
|
|
|
kfree(ec);
|
2006-06-26 22:41:40 -06:00
|
|
|
return 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static acpi_status
|
2007-03-07 12:28:00 -07:00
|
|
|
ec_parse_io_ports(struct acpi_resource *resource, void *context)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec = context;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
if (resource->type != ACPI_RESOURCE_TYPE_IO)
|
2005-04-16 16:20:36 -06:00
|
|
|
return AE_OK;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The first address region returned is the data port, and
|
|
|
|
* the second address region returned is the status/command
|
|
|
|
* port.
|
|
|
|
*/
|
2007-03-07 12:28:00 -07:00
|
|
|
if (ec->data_addr == 0)
|
2006-09-26 09:50:33 -06:00
|
|
|
ec->data_addr = resource->data.io.minimum;
|
2007-03-07 12:28:00 -07:00
|
|
|
else if (ec->command_addr == 0)
|
2006-09-26 09:50:33 -06:00
|
|
|
ec->command_addr = resource->data.io.minimum;
|
2007-03-07 12:28:00 -07:00
|
|
|
else
|
2005-04-16 16:20:36 -06:00
|
|
|
return AE_CTRL_TERMINATE;
|
|
|
|
|
|
|
|
return AE_OK;
|
|
|
|
}
|
|
|
|
|
2008-01-01 12:12:55 -07:00
|
|
|
int __init acpi_boot_ec_enable(void)
|
|
|
|
{
|
2008-09-25 11:00:31 -06:00
|
|
|
if (!boot_ec || test_bit(EC_FLAGS_HANDLERS_INSTALLED, &boot_ec->flags))
|
2008-01-01 12:12:55 -07:00
|
|
|
return 0;
|
|
|
|
if (!ec_install_handlers(boot_ec)) {
|
|
|
|
first_ec = boot_ec;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
|
2008-03-21 08:07:21 -06:00
|
|
|
static const struct acpi_device_id ec_device_ids[] = {
|
|
|
|
{"PNP0C09", 0},
|
|
|
|
{"", 0},
|
|
|
|
};
|
|
|
|
|
2009-10-02 10:21:40 -06:00
|
|
|
/* Some BIOS do not survive early DSDT scan, skip it */
|
|
|
|
static int ec_skip_dsdt_scan(const struct dmi_system_id *id)
|
|
|
|
{
|
|
|
|
EC_FLAGS_SKIP_DSDT_SCAN = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-10-02 10:21:33 -06:00
|
|
|
/* ASUStek often supplies us with broken ECDT, validate it */
|
|
|
|
static int ec_validate_ecdt(const struct dmi_system_id *id)
|
|
|
|
{
|
|
|
|
EC_FLAGS_VALIDATE_ECDT = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* MSI EC needs special treatment, enable it */
|
|
|
|
static int ec_flag_msi(const struct dmi_system_id *id)
|
|
|
|
{
|
2009-12-22 00:42:52 -07:00
|
|
|
printk(KERN_DEBUG PREFIX "Detected MSI hardware, enabling workarounds.\n");
|
2009-10-02 10:21:33 -06:00
|
|
|
EC_FLAGS_MSI = 1;
|
|
|
|
EC_FLAGS_VALIDATE_ECDT = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct dmi_system_id __initdata ec_dmi_table[] = {
|
2009-10-02 10:21:40 -06:00
|
|
|
{
|
|
|
|
ec_skip_dsdt_scan, "Compal JFL92", {
|
|
|
|
DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"),
|
|
|
|
DMI_MATCH(DMI_BOARD_NAME, "JFL92") }, NULL},
|
2009-10-02 10:21:33 -06:00
|
|
|
{
|
|
|
|
ec_flag_msi, "MSI hardware", {
|
2009-12-22 00:42:52 -07:00
|
|
|
DMI_MATCH(DMI_BIOS_VENDOR, "Micro-Star")}, NULL},
|
|
|
|
{
|
|
|
|
ec_flag_msi, "MSI hardware", {
|
|
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star")}, NULL},
|
|
|
|
{
|
|
|
|
ec_flag_msi, "MSI hardware", {
|
|
|
|
DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-Star")}, NULL},
|
2009-10-02 10:21:33 -06:00
|
|
|
{
|
|
|
|
ec_validate_ecdt, "ASUS hardware", {
|
|
|
|
DMI_MATCH(DMI_BIOS_VENDOR, "ASUS") }, NULL},
|
|
|
|
{},
|
|
|
|
};
|
|
|
|
|
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
int __init acpi_ec_ecdt_probe(void)
|
|
|
|
{
|
|
|
|
acpi_status status;
|
2009-01-13 16:57:53 -07:00
|
|
|
struct acpi_ec *saved_ec = NULL;
|
2005-08-11 15:32:05 -06:00
|
|
|
struct acpi_table_ecdt *ecdt_ptr;
|
2005-07-23 02:08:00 -06:00
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
boot_ec = make_acpi_ec();
|
|
|
|
if (!boot_ec)
|
2007-03-07 12:28:00 -07:00
|
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
|
|
* Generate a boot ec context
|
|
|
|
*/
|
2009-10-02 10:21:33 -06:00
|
|
|
dmi_check_system(ec_dmi_table);
|
2007-02-02 09:48:22 -07:00
|
|
|
status = acpi_get_table(ACPI_SIG_ECDT, 1,
|
|
|
|
(struct acpi_table_header **)&ecdt_ptr);
|
2007-08-03 15:52:48 -06:00
|
|
|
if (ACPI_SUCCESS(status)) {
|
2007-11-20 17:23:26 -07:00
|
|
|
pr_info(PREFIX "EC description table is found, configuring boot EC\n");
|
2007-08-03 15:52:48 -06:00
|
|
|
boot_ec->command_addr = ecdt_ptr->control.address;
|
|
|
|
boot_ec->data_addr = ecdt_ptr->data.address;
|
|
|
|
boot_ec->gpe = ecdt_ptr->gpe;
|
2008-03-10 22:27:16 -06:00
|
|
|
boot_ec->handle = ACPI_ROOT_OBJECT;
|
2008-03-24 14:22:36 -06:00
|
|
|
acpi_get_handle(ACPI_ROOT_OBJECT, ecdt_ptr->id, &boot_ec->handle);
|
2009-01-13 16:57:53 -07:00
|
|
|
/* Don't trust ECDT, which comes from ASUSTek */
|
2009-10-02 10:21:33 -06:00
|
|
|
if (!EC_FLAGS_VALIDATE_ECDT)
|
2008-11-26 15:11:53 -07:00
|
|
|
goto install;
|
2009-01-13 16:57:53 -07:00
|
|
|
saved_ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
|
|
|
|
if (!saved_ec)
|
|
|
|
return -ENOMEM;
|
2009-03-31 23:33:15 -06:00
|
|
|
memcpy(saved_ec, boot_ec, sizeof(struct acpi_ec));
|
2008-11-26 15:11:53 -07:00
|
|
|
/* fall through */
|
2007-08-03 15:52:48 -06:00
|
|
|
}
|
2009-10-02 10:21:33 -06:00
|
|
|
|
2009-10-02 10:21:40 -06:00
|
|
|
if (EC_FLAGS_SKIP_DSDT_SCAN)
|
|
|
|
return -ENODEV;
|
|
|
|
|
2008-11-26 15:11:53 -07:00
|
|
|
/* 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;
|
2009-01-13 16:57:53 -07:00
|
|
|
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 {
|
|
|
|
/* 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.
|
|
|
|
*/
|
|
|
|
acpi_handle dummy;
|
|
|
|
if (!dmi_name_in_vendors("ASUS") ||
|
|
|
|
ACPI_FAILURE(acpi_get_handle(boot_ec->handle, "_INI",
|
|
|
|
&dummy)))
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
2008-11-26 15:11:53 -07:00
|
|
|
install:
|
|
|
|
if (!ec_install_handlers(boot_ec)) {
|
2007-03-07 12:28:00 -07:00
|
|
|
first_ec = boot_ec;
|
2007-03-07 12:28:00 -07:00
|
|
|
return 0;
|
2007-03-07 12:28:00 -07:00
|
|
|
}
|
2008-11-26 15:11:53 -07:00
|
|
|
error:
|
2007-03-07 12:28:00 -07:00
|
|
|
kfree(boot_ec);
|
|
|
|
boot_ec = NULL;
|
2005-04-16 16:20:36 -06:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
2008-03-21 08:07:21 -06:00
|
|
|
static int acpi_ec_suspend(struct acpi_device *device, pm_message_t state)
|
|
|
|
{
|
|
|
|
struct acpi_ec *ec = acpi_driver_data(device);
|
2010-02-23 16:52:08 -07:00
|
|
|
/* Stop using the GPE, but keep it reference counted. */
|
2010-02-17 15:41:07 -07:00
|
|
|
acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);
|
2008-03-21 08:07:21 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int acpi_ec_resume(struct acpi_device *device)
|
|
|
|
{
|
|
|
|
struct acpi_ec *ec = acpi_driver_data(device);
|
2010-02-23 16:52:08 -07:00
|
|
|
/* Enable the GPE again, but don't reference count it once more. */
|
2010-02-17 15:41:07 -07:00
|
|
|
acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);
|
2008-03-21 08:07:21 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct acpi_driver acpi_ec_driver = {
|
|
|
|
.name = "ec",
|
|
|
|
.class = ACPI_EC_CLASS,
|
|
|
|
.ids = ec_device_ids,
|
|
|
|
.ops = {
|
|
|
|
.add = acpi_ec_add,
|
|
|
|
.remove = acpi_ec_remove,
|
|
|
|
.suspend = acpi_ec_suspend,
|
|
|
|
.resume = acpi_ec_resume,
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2009-03-24 16:49:48 -06:00
|
|
|
int __init acpi_ec_init(void)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2005-08-11 15:32:05 -06:00
|
|
|
int result = 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir);
|
|
|
|
if (!acpi_ec_dir)
|
2006-06-26 22:41:40 -06:00
|
|
|
return -ENODEV;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/* 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);
|
2006-06-26 22:41:40 -06:00
|
|
|
return -ENODEV;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2006-06-26 22:41:40 -06:00
|
|
|
return result;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* EC driver currently not unloadable */
|
|
|
|
#if 0
|
2005-08-11 15:32:05 -06:00
|
|
|
static void __exit acpi_ec_exit(void)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
|
|
|
|
acpi_bus_unregister_driver(&acpi_ec_driver);
|
|
|
|
|
|
|
|
remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir);
|
|
|
|
|
2006-06-26 22:41:40 -06:00
|
|
|
return;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2007-10-22 04:18:43 -06:00
|
|
|
#endif /* 0 */
|