2005-04-16 15:20:36 -07:00
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/*
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2007-03-07 12:28:00 -07:00
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* ec.c - ACPI Embedded Controller Driver (v2.0)
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2005-04-16 15:20:36 -07:00
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*
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2007-03-07 12:28:00 -07:00
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* Copyright (C) 2006, 2007 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
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* Copyright (C) 2006 Denis Sadykov <denis.m.sadykov@intel.com>
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2005-04-16 15:20:36 -07:00
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* Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/delay.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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2005-03-18 23:10:05 -07:00
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#include <linux/interrupt.h>
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2007-05-29 05:43:02 -07:00
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#include <linux/list.h>
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2005-04-16 15:20:36 -07:00
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#include <asm/io.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#include <acpi/actypes.h>
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#define ACPI_EC_CLASS "embedded_controller"
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#define ACPI_EC_DEVICE_NAME "Embedded Controller"
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#define ACPI_EC_FILE_INFO "info"
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2007-05-29 05:43:02 -07:00
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2006-12-07 08:42:16 -07:00
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#undef PREFIX
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#define PREFIX "ACPI: EC: "
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2007-05-29 05:42:57 -07:00
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2006-09-26 08:50:33 -07:00
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/* EC status register */
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2005-04-16 15:20:36 -07:00
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#define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */
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#define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */
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2005-03-18 23:10:05 -07:00
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#define ACPI_EC_FLAG_BURST 0x10 /* burst mode */
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2005-04-16 15:20:36 -07:00
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#define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */
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2007-05-29 05:42:57 -07:00
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2006-09-26 08:50:33 -07:00
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/* EC commands */
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2006-12-07 08:42:17 -07:00
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enum ec_command {
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2006-12-07 08:42:17 -07:00
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ACPI_EC_COMMAND_READ = 0x80,
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ACPI_EC_COMMAND_WRITE = 0x81,
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ACPI_EC_BURST_ENABLE = 0x82,
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ACPI_EC_BURST_DISABLE = 0x83,
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ACPI_EC_COMMAND_QUERY = 0x84,
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2006-12-07 08:42:17 -07:00
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};
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2007-05-29 05:43:02 -07:00
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2006-09-26 08:50:33 -07:00
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/* EC events */
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2006-12-07 08:42:17 -07:00
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enum ec_event {
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2006-09-26 08:50:33 -07:00
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ACPI_EC_EVENT_OBF_1 = 1, /* Output buffer full */
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2006-12-07 08:42:17 -07:00
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ACPI_EC_EVENT_IBF_0, /* Input buffer empty */
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2006-09-26 08:50:33 -07:00
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};
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2006-12-07 08:42:16 -07:00
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#define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */
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2006-09-26 08:50:33 -07:00
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#define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */
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2006-12-07 08:42:17 -07:00
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static enum ec_mode {
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2006-12-07 08:42:17 -07:00
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EC_INTR = 1, /* Output buffer full */
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EC_POLL, /* Input buffer empty */
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2006-12-07 08:42:17 -07:00
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} acpi_ec_mode = EC_INTR;
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2006-09-26 08:50:33 -07:00
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2005-08-11 14:32:05 -07:00
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static int acpi_ec_remove(struct acpi_device *device, int type);
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static int acpi_ec_start(struct acpi_device *device);
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static int acpi_ec_stop(struct acpi_device *device, int type);
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2006-09-26 08:50:33 -07:00
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static int acpi_ec_add(struct acpi_device *device);
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2005-04-16 15:20:36 -07:00
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2007-07-23 05:44:41 -07:00
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static const struct acpi_device_id ec_device_ids[] = {
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{"PNP0C09", 0},
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{"", 0},
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};
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2005-04-16 15:20:36 -07:00
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static struct acpi_driver acpi_ec_driver = {
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2007-02-12 21:33:40 -07:00
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.name = "ec",
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2005-08-11 14:32:05 -07:00
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.class = ACPI_EC_CLASS,
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2007-07-23 05:44:41 -07:00
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.ids = ec_device_ids,
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2005-08-11 14:32:05 -07:00
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.ops = {
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2006-09-26 08:50:33 -07:00
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.add = acpi_ec_add,
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2005-08-11 14:32:05 -07:00
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.remove = acpi_ec_remove,
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.start = acpi_ec_start,
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.stop = acpi_ec_stop,
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},
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2005-04-16 15:20:36 -07:00
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};
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2006-09-26 08:50:33 -07:00
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/* If we find an EC via the ECDT, we need to keep a ptr to its context */
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2007-03-07 12:28:00 -07:00
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/* External interfaces use first EC only, so remember */
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2007-05-29 05:43:02 -07:00
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typedef int (*acpi_ec_query_func) (void *data);
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struct acpi_ec_query_handler {
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struct list_head node;
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acpi_ec_query_func func;
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acpi_handle handle;
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void *data;
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u8 query_bit;
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};
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2006-12-19 13:56:12 -07:00
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static struct acpi_ec {
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2006-09-26 08:50:33 -07:00
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acpi_handle handle;
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2006-12-07 08:42:16 -07:00
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unsigned long gpe;
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2006-09-26 08:50:33 -07:00
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unsigned long command_addr;
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unsigned long data_addr;
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2006-09-26 08:50:33 -07:00
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unsigned long global_lock;
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2006-12-07 08:42:16 -07:00
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struct mutex lock;
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2006-12-07 08:42:16 -07:00
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atomic_t query_pending;
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2007-03-07 16:29:35 -07:00
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atomic_t event_count;
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2006-09-26 08:50:33 -07:00
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wait_queue_head_t wait;
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2007-05-29 05:43:02 -07:00
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struct list_head list;
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2007-03-07 12:28:00 -07:00
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} *boot_ec, *first_ec;
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2006-09-26 08:50:33 -07:00
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2005-04-16 15:20:36 -07:00
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/* --------------------------------------------------------------------------
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Transaction Management
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-------------------------------------------------------------------------- */
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2006-09-26 08:50:33 -07:00
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static inline u8 acpi_ec_read_status(struct acpi_ec *ec)
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2005-04-16 15:20:36 -07:00
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{
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2006-09-26 08:50:33 -07:00
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return inb(ec->command_addr);
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2005-03-18 23:10:05 -07:00
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}
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2006-09-26 08:50:33 -07:00
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static inline u8 acpi_ec_read_data(struct acpi_ec *ec)
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2006-09-26 08:50:33 -07:00
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{
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2006-09-26 08:50:33 -07:00
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return inb(ec->data_addr);
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2006-09-26 08:50:33 -07:00
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}
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2006-09-26 08:50:33 -07:00
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static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command)
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2005-07-23 01:08:00 -07:00
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{
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2006-09-26 08:50:33 -07:00
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outb(command, ec->command_addr);
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2005-07-23 01:08:00 -07:00
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}
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2006-09-26 08:50:33 -07:00
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static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data)
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2005-07-23 01:08:00 -07:00
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{
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2006-09-26 08:50:33 -07:00
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outb(data, ec->data_addr);
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2006-09-26 08:50:33 -07:00
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}
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2005-07-23 01:08:00 -07:00
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2007-03-07 16:29:35 -07:00
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static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event,
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unsigned old_count)
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2006-09-26 08:50:33 -07:00
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{
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2006-12-07 08:42:16 -07:00
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u8 status = acpi_ec_read_status(ec);
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2007-03-07 16:29:35 -07:00
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if (old_count == atomic_read(&ec->event_count))
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return 0;
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2006-12-07 08:42:17 -07:00
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if (event == ACPI_EC_EVENT_OBF_1) {
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2006-09-26 08:50:33 -07:00
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if (status & ACPI_EC_FLAG_OBF)
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return 1;
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2006-12-07 08:42:17 -07:00
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} else if (event == ACPI_EC_EVENT_IBF_0) {
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2006-09-26 08:50:33 -07:00
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if (!(status & ACPI_EC_FLAG_IBF))
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return 1;
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2005-07-23 01:08:00 -07:00
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}
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2006-09-26 08:50:33 -07:00
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return 0;
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2005-07-23 01:08:00 -07:00
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}
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2005-03-18 23:10:05 -07:00
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2007-05-04 05:16:19 -07:00
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static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event,
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unsigned count, int force_poll)
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2006-09-26 08:50:33 -07:00
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{
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2007-05-04 05:16:19 -07:00
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if (unlikely(force_poll) || acpi_ec_mode == EC_POLL) {
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2006-12-07 08:42:17 -07:00
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unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);
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while (time_before(jiffies, delay)) {
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2007-03-07 16:29:35 -07:00
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if (acpi_ec_check_status(ec, event, 0))
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2006-09-26 08:50:33 -07:00
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return 0;
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}
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2006-12-07 08:42:16 -07:00
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} else {
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if (wait_event_timeout(ec->wait,
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2007-03-07 16:29:35 -07:00
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acpi_ec_check_status(ec, event, count),
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2006-12-07 08:42:16 -07:00
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msecs_to_jiffies(ACPI_EC_DELAY)) ||
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2007-03-07 16:29:35 -07:00
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acpi_ec_check_status(ec, event, 0)) {
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2006-09-26 08:50:33 -07:00
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return 0;
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2006-12-07 08:42:16 -07:00
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} else {
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printk(KERN_ERR PREFIX "acpi_ec_wait timeout,"
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" status = %d, expect_event = %d\n",
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2006-12-07 08:42:17 -07:00
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acpi_ec_read_status(ec), event);
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2006-09-26 08:50:33 -07:00
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}
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2006-12-07 08:42:16 -07:00
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}
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2005-04-16 15:20:36 -07:00
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2006-06-26 21:41:40 -07:00
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return -ETIME;
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2005-04-16 15:20:36 -07:00
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}
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2006-09-26 08:50:33 -07:00
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static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
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2006-12-07 08:42:17 -07:00
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const u8 * wdata, unsigned wdata_len,
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2007-05-04 05:16:19 -07:00
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u8 * rdata, unsigned rdata_len,
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int force_poll)
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2005-07-23 01:08:00 -07:00
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{
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2006-12-07 08:42:16 -07:00
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int result = 0;
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2007-03-07 16:29:35 -07:00
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unsigned count = atomic_read(&ec->event_count);
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2006-09-26 08:50:33 -07:00
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acpi_ec_write_cmd(ec, command);
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2005-07-23 01:08:00 -07:00
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2006-12-07 08:42:17 -07:00
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for (; wdata_len > 0; --wdata_len) {
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2007-05-04 05:16:19 -07:00
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result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count, force_poll);
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2006-12-07 08:42:16 -07:00
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if (result) {
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2006-12-07 08:42:17 -07:00
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printk(KERN_ERR PREFIX
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"write_cmd timeout, command = %d\n", command);
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2006-12-07 08:42:16 -07:00
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goto end;
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}
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2007-03-07 16:29:35 -07:00
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count = atomic_read(&ec->event_count);
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2006-09-26 08:50:33 -07:00
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acpi_ec_write_data(ec, *(wdata++));
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2006-09-26 08:50:33 -07:00
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}
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2005-07-23 01:08:00 -07:00
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2006-12-07 08:42:16 -07:00
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if (!rdata_len) {
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2007-05-04 05:16:19 -07:00
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result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count, force_poll);
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2006-12-07 08:42:16 -07:00
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if (result) {
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2006-12-07 08:42:17 -07:00
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printk(KERN_ERR PREFIX
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"finish-write timeout, command = %d\n", command);
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2006-12-07 08:42:16 -07:00
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goto end;
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}
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2006-12-07 08:42:16 -07:00
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} else if (command == ACPI_EC_COMMAND_QUERY) {
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atomic_set(&ec->query_pending, 0);
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2006-09-26 08:50:33 -07:00
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}
|
2005-07-23 01:08:00 -07:00
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2006-12-07 08:42:17 -07:00
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for (; rdata_len > 0; --rdata_len) {
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2007-05-04 05:16:19 -07:00
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result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, count, force_poll);
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2006-12-07 08:42:16 -07:00
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if (result) {
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printk(KERN_ERR PREFIX "read timeout, command = %d\n",
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2006-12-07 08:42:17 -07:00
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command);
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2006-12-07 08:42:16 -07:00
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goto end;
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}
|
2007-03-07 16:29:35 -07:00
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count = atomic_read(&ec->event_count);
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2006-09-26 08:50:33 -07:00
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*(rdata++) = acpi_ec_read_data(ec);
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2006-09-26 08:50:33 -07:00
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}
|
2006-12-07 08:42:16 -07:00
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end:
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return result;
|
2005-07-23 01:08:00 -07:00
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}
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|
2006-09-26 08:50:33 -07:00
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static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
|
2006-12-07 08:42:17 -07:00
|
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const u8 * wdata, unsigned wdata_len,
|
2007-05-04 05:16:19 -07:00
|
|
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u8 * rdata, unsigned rdata_len,
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|
|
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int force_poll)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2006-09-05 09:12:24 -07:00
|
|
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int status;
|
2005-08-11 14:32:05 -07:00
|
|
|
u32 glk;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-09-05 09:12:24 -07:00
|
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|
if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata))
|
2006-06-26 21:41:40 -07:00
|
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|
return -EINVAL;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-12-07 08:42:17 -07:00
|
|
|
if (rdata)
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|
|
|
memset(rdata, 0, rdata_len);
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-12-07 08:42:17 -07:00
|
|
|
mutex_lock(&ec->lock);
|
2006-09-26 08:50:33 -07:00
|
|
|
if (ec->global_lock) {
|
2005-04-16 15:20:36 -07:00
|
|
|
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
|
2007-02-15 13:16:18 -07:00
|
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
mutex_unlock(&ec->lock);
|
2006-06-26 21:41:40 -07:00
|
|
|
return -ENODEV;
|
2007-02-15 13:16:18 -07:00
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
2005-03-18 23:10:05 -07:00
|
|
|
|
2006-12-07 08:42:16 -07:00
|
|
|
/* Make sure GPE is enabled before doing transaction */
|
2006-12-07 08:42:16 -07:00
|
|
|
acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);
|
2006-12-07 08:42:16 -07:00
|
|
|
|
2007-05-04 05:16:19 -07:00
|
|
|
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, 0, 0);
|
2005-08-09 22:40:00 -07:00
|
|
|
if (status) {
|
2007-05-29 05:42:57 -07:00
|
|
|
printk(KERN_ERR PREFIX
|
2006-12-07 08:42:17 -07:00
|
|
|
"input buffer is not empty, aborting transaction\n");
|
2005-03-18 23:10:05 -07:00
|
|
|
goto end;
|
2005-08-09 22:40:00 -07:00
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-12-07 08:42:17 -07:00
|
|
|
status = acpi_ec_transaction_unlocked(ec, command,
|
|
|
|
wdata, wdata_len,
|
2007-05-04 05:16:19 -07:00
|
|
|
rdata, rdata_len,
|
|
|
|
force_poll);
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-12-07 08:42:17 -07:00
|
|
|
end:
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-09-26 08:50:33 -07:00
|
|
|
if (ec->global_lock)
|
2005-04-16 15:20:36 -07:00
|
|
|
acpi_release_global_lock(glk);
|
2006-12-07 08:42:17 -07:00
|
|
|
mutex_unlock(&ec->lock);
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-06-26 21:41:40 -07:00
|
|
|
return status;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
/*
|
|
|
|
* 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)
|
|
|
|
{
|
|
|
|
u8 d;
|
2007-05-04 05:16:19 -07:00
|
|
|
return acpi_ec_transaction(ec, ACPI_EC_BURST_ENABLE, NULL, 0, &d, 1, 0);
|
2007-03-07 12:28:00 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
int acpi_ec_burst_disable(struct acpi_ec *ec)
|
|
|
|
{
|
2007-05-04 05:16:19 -07:00
|
|
|
return acpi_ec_transaction(ec, ACPI_EC_BURST_DISABLE, NULL, 0, NULL, 0, 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 08:50:33 -07:00
|
|
|
{
|
|
|
|
int result;
|
|
|
|
u8 d;
|
|
|
|
|
|
|
|
result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ,
|
2007-05-04 05:16:19 -07:00
|
|
|
&address, 1, &d, 1, 0);
|
2006-09-26 08:50:33 -07:00
|
|
|
*data = d;
|
|
|
|
return result;
|
|
|
|
}
|
2006-09-26 08:50:33 -07:00
|
|
|
|
2006-09-26 08:50:33 -07:00
|
|
|
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 };
|
|
|
|
return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE,
|
2007-05-04 05:16:19 -07:00
|
|
|
wdata, 2, NULL, 0, 0);
|
2006-09-26 08:50:33 -07:00
|
|
|
}
|
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
/*
|
|
|
|
* 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 15:20:36 -07:00
|
|
|
{
|
|
|
|
int err;
|
2006-09-26 08:50:33 -07:00
|
|
|
u8 temp_data;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
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 15:20:36 -07:00
|
|
|
|
|
|
|
if (!err) {
|
|
|
|
*val = temp_data;
|
|
|
|
return 0;
|
2005-08-11 14:32:05 -07:00
|
|
|
} else
|
2005-04-16 15:20:36 -07:00
|
|
|
return err;
|
|
|
|
}
|
2005-08-11 14:32:05 -07:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
EXPORT_SYMBOL(ec_read);
|
|
|
|
|
2005-08-11 14:32:05 -07:00
|
|
|
int ec_write(u8 addr, u8 val)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
|
|
|
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 15:20:36 -07:00
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
2005-08-11 14:32:05 -07:00
|
|
|
|
2005-04-16 15:20:36 -07:00
|
|
|
EXPORT_SYMBOL(ec_write);
|
|
|
|
|
2006-10-26 22:47:34 -07:00
|
|
|
int ec_transaction(u8 command,
|
2007-03-07 16:29:35 -07:00
|
|
|
const u8 * wdata, unsigned wdata_len,
|
2007-05-04 05:16:19 -07:00
|
|
|
u8 * rdata, unsigned rdata_len,
|
|
|
|
int force_poll)
|
2005-07-23 01:08:00 -07:00
|
|
|
{
|
2006-09-05 09:12:24 -07:00
|
|
|
if (!first_ec)
|
|
|
|
return -ENODEV;
|
2005-07-23 01:08:00 -07:00
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
return acpi_ec_transaction(first_ec, command, wdata,
|
2007-05-04 05:16:19 -07:00
|
|
|
wdata_len, rdata, rdata_len,
|
|
|
|
force_poll);
|
2005-07-23 01:08:00 -07:00
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-10-03 19:49:00 -07:00
|
|
|
EXPORT_SYMBOL(ec_transaction);
|
|
|
|
|
2006-12-07 08:42:17 -07:00
|
|
|
static int acpi_ec_query(struct acpi_ec *ec, u8 * data)
|
2006-09-26 08:50:33 -07:00
|
|
|
{
|
|
|
|
int result;
|
2006-12-07 08:42:17 -07:00
|
|
|
u8 d;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-12-07 08:42:17 -07:00
|
|
|
if (!ec || !data)
|
|
|
|
return -EINVAL;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-12-07 08:42:17 -07:00
|
|
|
/*
|
|
|
|
* 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).
|
|
|
|
*/
|
2005-08-09 22:40:00 -07:00
|
|
|
|
2007-05-04 05:16:19 -07:00
|
|
|
result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1, 0);
|
2006-12-07 08:42:17 -07:00
|
|
|
if (result)
|
|
|
|
return result;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-12-07 08:42:17 -07:00
|
|
|
if (!d)
|
|
|
|
return -ENODATA;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2006-12-07 08:42:17 -07:00
|
|
|
*data = d;
|
|
|
|
return 0;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
|
|
Event Management
|
|
|
|
-------------------------------------------------------------------------- */
|
2007-05-29 05:43:02 -07:00
|
|
|
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);
|
|
|
|
list_add_tail(&handler->node, &ec->list);
|
|
|
|
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)
|
|
|
|
{
|
|
|
|
struct acpi_ec_query_handler *handler;
|
|
|
|
mutex_lock(&ec->lock);
|
|
|
|
list_for_each_entry(handler, &ec->list, node) {
|
|
|
|
if (query_bit == handler->query_bit) {
|
|
|
|
list_del(&handler->node);
|
|
|
|
kfree(handler);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
mutex_unlock(&ec->lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler);
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2005-08-11 14:32:05 -07:00
|
|
|
static void acpi_ec_gpe_query(void *ec_cxt)
|
2005-07-23 01:08:00 -07:00
|
|
|
{
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec = ec_cxt;
|
2006-09-26 08:50:33 -07:00
|
|
|
u8 value = 0;
|
2007-05-29 05:43:02 -07:00
|
|
|
struct acpi_ec_query_handler *handler, copy;
|
2005-07-23 01:08:00 -07:00
|
|
|
|
2006-12-07 08:42:16 -07:00
|
|
|
if (!ec || acpi_ec_query(ec, &value))
|
2006-12-07 08:42:16 -07:00
|
|
|
return;
|
2007-05-29 05:43:02 -07:00
|
|
|
mutex_lock(&ec->lock);
|
|
|
|
list_for_each_entry(handler, &ec->list, node) {
|
|
|
|
if (value == handler->query_bit) {
|
|
|
|
/* have custom handler for this bit */
|
|
|
|
memcpy(©, handler, sizeof(copy));
|
|
|
|
mutex_unlock(&ec->lock);
|
|
|
|
if (copy.func) {
|
|
|
|
copy.func(copy.data);
|
|
|
|
} else if (copy.handle) {
|
|
|
|
acpi_evaluate_object(copy.handle, NULL, NULL, NULL);
|
|
|
|
}
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
mutex_unlock(&ec->lock);
|
2005-07-23 01:08:00 -07:00
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2005-08-11 14:32:05 -07:00
|
|
|
static u32 acpi_ec_gpe_handler(void *data)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2005-08-11 14:32:05 -07:00
|
|
|
acpi_status status = AE_OK;
|
2006-09-26 08:50:33 -07:00
|
|
|
u8 value;
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec = data;
|
2007-05-04 05:16:19 -07:00
|
|
|
|
2007-03-07 16:29:35 -07:00
|
|
|
atomic_inc(&ec->event_count);
|
2007-03-07 12:28:00 -07:00
|
|
|
|
2006-09-26 08:50:33 -07:00
|
|
|
if (acpi_ec_mode == EC_INTR) {
|
2006-12-07 08:42:16 -07:00
|
|
|
wake_up(&ec->wait);
|
2005-03-18 23:10:05 -07:00
|
|
|
}
|
|
|
|
|
2006-12-07 08:42:16 -07:00
|
|
|
value = acpi_ec_read_status(ec);
|
2006-12-07 08:42:16 -07:00
|
|
|
if ((value & ACPI_EC_FLAG_SCI) && !atomic_read(&ec->query_pending)) {
|
|
|
|
atomic_set(&ec->query_pending, 1);
|
2006-12-07 08:42:17 -07:00
|
|
|
status =
|
2007-05-29 05:43:02 -07:00
|
|
|
acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec);
|
2005-08-11 14:32:05 -07:00
|
|
|
}
|
2006-12-07 08:42:16 -07:00
|
|
|
|
2005-03-18 23:10:05 -07:00
|
|
|
return status == AE_OK ?
|
2005-08-11 14:32:05 -07:00
|
|
|
ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
|
|
Address Space Management
|
|
|
|
-------------------------------------------------------------------------- */
|
|
|
|
|
|
|
|
static acpi_status
|
2005-08-11 14:32:05 -07:00
|
|
|
acpi_ec_space_setup(acpi_handle region_handle,
|
|
|
|
u32 function, void *handler_context, void **return_context)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
|
|
|
/*
|
|
|
|
* The EC object is in the handler context and is needed
|
|
|
|
* when calling the acpi_ec_space_handler.
|
|
|
|
*/
|
2005-08-11 14:32:05 -07:00
|
|
|
*return_context = (function != ACPI_REGION_DEACTIVATE) ?
|
|
|
|
handler_context : NULL;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
return AE_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
static acpi_status
|
2007-05-29 05:42:52 -07:00
|
|
|
acpi_ec_space_handler(u32 function, acpi_physical_address address,
|
|
|
|
u32 bits, acpi_integer *value,
|
2005-08-11 14:32:05 -07:00
|
|
|
void *handler_context, void *region_context)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec = handler_context;
|
2007-05-29 05:42:52 -07:00
|
|
|
int result = 0, i = 0;
|
|
|
|
u8 temp = 0;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
if ((address > 0xFF) || !value || !handler_context)
|
2006-06-26 21:41:40 -07:00
|
|
|
return AE_BAD_PARAMETER;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-05-29 05:42:52 -07:00
|
|
|
if (function != ACPI_READ && function != ACPI_WRITE)
|
2006-06-26 21:41:40 -07:00
|
|
|
return AE_BAD_PARAMETER;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-05-29 05:42:52 -07:00
|
|
|
if (bits != 8 && acpi_strict)
|
|
|
|
return AE_BAD_PARAMETER;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-05-29 05:42:52 -07:00
|
|
|
while (bits - i > 0) {
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
i += 8;
|
|
|
|
++address;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
switch (result) {
|
|
|
|
case -EINVAL:
|
2006-06-26 21:41:40 -07:00
|
|
|
return AE_BAD_PARAMETER;
|
2005-04-16 15:20:36 -07:00
|
|
|
break;
|
|
|
|
case -ENODEV:
|
2006-06-26 21:41:40 -07:00
|
|
|
return AE_NOT_FOUND;
|
2005-04-16 15:20:36 -07:00
|
|
|
break;
|
|
|
|
case -ETIME:
|
2006-06-26 21:41:40 -07:00
|
|
|
return AE_TIME;
|
2005-04-16 15:20:36 -07:00
|
|
|
break;
|
|
|
|
default:
|
2006-06-26 21:41:40 -07:00
|
|
|
return AE_OK;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
|
|
FS Interface (/proc)
|
|
|
|
-------------------------------------------------------------------------- */
|
|
|
|
|
2005-08-11 14:32:05 -07:00
|
|
|
static struct proc_dir_entry *acpi_ec_dir;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2005-08-11 14:32:05 -07:00
|
|
|
static int acpi_ec_read_info(struct seq_file *seq, void *offset)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec = seq->private;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
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 08:50:33 -07:00
|
|
|
ec->global_lock ? "yes" : "no");
|
2005-08-11 14:32:05 -07:00
|
|
|
end:
|
2006-06-26 21:41:40 -07:00
|
|
|
return 0;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int acpi_ec_info_open_fs(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
return single_open(file, acpi_ec_read_info, PDE(inode)->data);
|
|
|
|
}
|
|
|
|
|
2006-09-26 08:50:33 -07:00
|
|
|
static struct file_operations acpi_ec_info_ops = {
|
2005-08-11 14:32:05 -07:00
|
|
|
.open = acpi_ec_info_open_fs,
|
|
|
|
.read = seq_read,
|
|
|
|
.llseek = seq_lseek,
|
|
|
|
.release = single_release,
|
2005-04-16 15:20:36 -07:00
|
|
|
.owner = THIS_MODULE,
|
|
|
|
};
|
|
|
|
|
2005-08-11 14:32:05 -07:00
|
|
|
static int acpi_ec_add_fs(struct acpi_device *device)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2005-08-11 14:32:05 -07:00
|
|
|
struct proc_dir_entry *entry = NULL;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
if (!acpi_device_dir(device)) {
|
|
|
|
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
|
2005-08-11 14:32:05 -07:00
|
|
|
acpi_ec_dir);
|
2005-04-16 15:20:36 -07:00
|
|
|
if (!acpi_device_dir(device))
|
2006-06-26 21:41:40 -07:00
|
|
|
return -ENODEV;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
entry = create_proc_entry(ACPI_EC_FILE_INFO, S_IRUGO,
|
2005-08-11 14:32:05 -07:00
|
|
|
acpi_device_dir(device));
|
2005-04-16 15:20:36 -07:00
|
|
|
if (!entry)
|
2006-06-26 21:41:40 -07:00
|
|
|
return -ENODEV;
|
2005-04-16 15:20:36 -07:00
|
|
|
else {
|
|
|
|
entry->proc_fops = &acpi_ec_info_ops;
|
|
|
|
entry->data = acpi_driver_data(device);
|
|
|
|
entry->owner = THIS_MODULE;
|
|
|
|
}
|
|
|
|
|
2006-06-26 21:41:40 -07:00
|
|
|
return 0;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
2005-08-11 14:32:05 -07:00
|
|
|
static int acpi_ec_remove_fs(struct acpi_device *device)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
|
|
|
|
|
|
|
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 21:41:40 -07:00
|
|
|
return 0;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/* --------------------------------------------------------------------------
|
|
|
|
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;
|
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
atomic_set(&ec->query_pending, 1);
|
2007-03-07 12:28:00 -07:00
|
|
|
atomic_set(&ec->event_count, 1);
|
|
|
|
mutex_init(&ec->lock);
|
|
|
|
init_waitqueue_head(&ec->wait);
|
2007-05-29 05:43:02 -07:00
|
|
|
INIT_LIST_HEAD(&ec->list);
|
2007-03-07 12:28:00 -07:00
|
|
|
|
|
|
|
return ec;
|
|
|
|
}
|
2007-05-29 05:43:02 -07:00
|
|
|
|
2007-08-13 22:03:42 -07:00
|
|
|
static acpi_status
|
|
|
|
acpi_ec_register_query_methods(acpi_handle handle, u32 level,
|
|
|
|
void *context, void **return_value)
|
|
|
|
{
|
|
|
|
struct acpi_namespace_node *node = handle;
|
|
|
|
struct acpi_ec *ec = context;
|
|
|
|
int value = 0;
|
|
|
|
if (sscanf(node->name.ascii, "_Q%x", &value) == 1) {
|
|
|
|
acpi_ec_add_query_handler(ec, value, handle, NULL, NULL);
|
|
|
|
}
|
|
|
|
return AE_OK;
|
|
|
|
}
|
|
|
|
|
2007-08-03 14:52:48 -07:00
|
|
|
static acpi_status
|
|
|
|
ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
|
2007-05-29 05:43:02 -07:00
|
|
|
{
|
2007-08-03 14:52:48 -07:00
|
|
|
acpi_status status;
|
|
|
|
|
|
|
|
struct acpi_ec *ec = context;
|
|
|
|
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
|
|
|
|
ec_parse_io_ports, ec);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
return status;
|
2007-05-29 05:43:02 -07:00
|
|
|
|
|
|
|
/* Get GPE bit assignment (EC events). */
|
|
|
|
/* TODO: Add support for _GPE returning a package */
|
2007-08-03 14:52:48 -07:00
|
|
|
status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec->gpe);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
return status;
|
2007-05-29 05:43:02 -07:00
|
|
|
|
2007-08-13 22:03:42 -07:00
|
|
|
/* Find and register all query methods */
|
|
|
|
acpi_walk_namespace(ACPI_TYPE_METHOD, handle, 1,
|
|
|
|
acpi_ec_register_query_methods, ec, NULL);
|
|
|
|
|
2007-05-29 05:43:02 -07:00
|
|
|
/* Use the global lock for all EC transactions? */
|
|
|
|
acpi_evaluate_integer(handle, "_GLK", NULL, &ec->global_lock);
|
|
|
|
|
|
|
|
ec->handle = handle;
|
|
|
|
|
2007-07-26 02:56:55 -07:00
|
|
|
printk(KERN_INFO PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n",
|
2007-05-29 05:43:02 -07:00
|
|
|
ec->gpe, ec->command_addr, ec->data_addr);
|
|
|
|
|
2007-08-03 14:52:48 -07:00
|
|
|
return AE_CTRL_TERMINATE;
|
2007-05-29 05:43:02 -07:00
|
|
|
}
|
|
|
|
|
2006-09-26 08:50:33 -07:00
|
|
|
static int acpi_ec_add(struct acpi_device *device)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2006-09-26 08:50:33 -07:00
|
|
|
struct acpi_ec *ec = NULL;
|
2005-07-23 01:08:00 -07:00
|
|
|
|
|
|
|
if (!device)
|
2006-06-26 21:41:40 -07:00
|
|
|
return -EINVAL;
|
2005-07-23 01:08:00 -07:00
|
|
|
|
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);
|
|
|
|
|
|
|
|
ec = make_acpi_ec();
|
2005-07-23 01:08:00 -07:00
|
|
|
if (!ec)
|
2006-06-26 21:41:40 -07:00
|
|
|
return -ENOMEM;
|
2006-09-26 08:50:33 -07:00
|
|
|
|
2007-08-03 14:52:48 -07:00
|
|
|
if (ec_parse_device(device->handle, 0, ec, NULL) !=
|
|
|
|
AE_CTRL_TERMINATE) {
|
2007-03-07 12:28:00 -07:00
|
|
|
kfree(ec);
|
|
|
|
return -EINVAL;
|
2005-07-23 01:08:00 -07:00
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
/* Check if we found the boot EC */
|
2007-03-07 12:28:00 -07:00
|
|
|
if (boot_ec) {
|
|
|
|
if (boot_ec->gpe == ec->gpe) {
|
2007-08-23 21:10:11 -07:00
|
|
|
/* We might have incorrect info for GL at boot time */
|
|
|
|
mutex_lock(&boot_ec->lock);
|
|
|
|
boot_ec->global_lock = ec->global_lock;
|
|
|
|
/* Copy handlers from new ec into boot ec */
|
|
|
|
list_splice(&ec->list, &boot_ec->list);
|
|
|
|
mutex_unlock(&boot_ec->lock);
|
|
|
|
kfree(ec);
|
|
|
|
ec = boot_ec;
|
2007-03-07 12:28:00 -07:00
|
|
|
}
|
2007-08-23 21:10:11 -07:00
|
|
|
} else
|
2007-03-07 12:28:00 -07:00
|
|
|
first_ec = ec;
|
2007-03-07 12:28:00 -07:00
|
|
|
ec->handle = device->handle;
|
|
|
|
acpi_driver_data(device) = ec;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
acpi_ec_add_fs(device);
|
|
|
|
return 0;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
2005-08-11 14:32:05 -07:00
|
|
|
static int acpi_ec_remove(struct acpi_device *device, int type)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec;
|
2007-07-29 08:00:37 -07:00
|
|
|
struct acpi_ec_query_handler *handler, *tmp;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
if (!device)
|
2006-06-26 21:41:40 -07:00
|
|
|
return -EINVAL;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
ec = acpi_driver_data(device);
|
2007-05-29 05:43:02 -07:00
|
|
|
mutex_lock(&ec->lock);
|
2007-07-29 08:00:37 -07:00
|
|
|
list_for_each_entry_safe(handler, tmp, &ec->list, node) {
|
2007-05-29 05:43:02 -07:00
|
|
|
list_del(&handler->node);
|
|
|
|
kfree(handler);
|
|
|
|
}
|
|
|
|
mutex_unlock(&ec->lock);
|
2005-04-16 15:20:36 -07:00
|
|
|
acpi_ec_remove_fs(device);
|
2007-03-07 12:28:00 -07:00
|
|
|
acpi_driver_data(device) = NULL;
|
2007-03-07 12:28:00 -07:00
|
|
|
if (ec == first_ec)
|
2007-03-07 12:28:00 -07:00
|
|
|
first_ec = NULL;
|
|
|
|
|
2007-08-23 21:10:11 -07:00
|
|
|
/* Don't touch boot EC */
|
|
|
|
if (boot_ec != ec)
|
|
|
|
kfree(ec);
|
2006-06-26 21:41:40 -07:00
|
|
|
return 0;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static acpi_status
|
2007-03-07 12:28:00 -07:00
|
|
|
ec_parse_io_ports(struct acpi_resource *resource, void *context)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec = context;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
if (resource->type != ACPI_RESOURCE_TYPE_IO)
|
2005-04-16 15:20:36 -07:00
|
|
|
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 08:50:33 -07:00
|
|
|
ec->data_addr = resource->data.io.minimum;
|
2007-03-07 12:28:00 -07:00
|
|
|
else if (ec->command_addr == 0)
|
2006-09-26 08:50:33 -07:00
|
|
|
ec->command_addr = resource->data.io.minimum;
|
2007-03-07 12:28:00 -07:00
|
|
|
else
|
2005-04-16 15:20:36 -07:00
|
|
|
return AE_CTRL_TERMINATE;
|
|
|
|
|
|
|
|
return AE_OK;
|
|
|
|
}
|
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
static int ec_install_handlers(struct acpi_ec *ec)
|
|
|
|
{
|
2007-03-07 12:28:00 -07:00
|
|
|
acpi_status status;
|
|
|
|
status = acpi_install_gpe_handler(NULL, ec->gpe,
|
|
|
|
ACPI_GPE_EDGE_TRIGGERED,
|
|
|
|
&acpi_ec_gpe_handler, ec);
|
2007-03-07 12:28:00 -07:00
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
return -ENODEV;
|
2007-03-07 12:28:00 -07:00
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
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, &acpi_ec_gpe_handler);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-08-11 14:32:05 -07:00
|
|
|
static int acpi_ec_start(struct acpi_device *device)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec;
|
2007-05-29 05:43:02 -07:00
|
|
|
int ret = 0;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
if (!device)
|
2006-06-26 21:41:40 -07:00
|
|
|
return -EINVAL;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
ec = acpi_driver_data(device);
|
|
|
|
|
|
|
|
if (!ec)
|
2006-06-26 21:41:40 -07:00
|
|
|
return -EINVAL;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-08-23 21:10:11 -07:00
|
|
|
/* Boot EC is already working */
|
|
|
|
if (ec != boot_ec)
|
|
|
|
ret = ec_install_handlers(ec);
|
2007-05-29 05:43:02 -07:00
|
|
|
|
|
|
|
/* EC is fully operational, allow queries */
|
|
|
|
atomic_set(&ec->query_pending, 0);
|
2007-03-07 12:28:00 -07:00
|
|
|
|
2007-05-29 05:43:02 -07:00
|
|
|
return ret;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
2005-08-11 14:32:05 -07:00
|
|
|
static int acpi_ec_stop(struct acpi_device *device, int type)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2007-08-23 21:10:11 -07:00
|
|
|
acpi_status status;
|
2007-03-07 12:28:00 -07:00
|
|
|
struct acpi_ec *ec;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
if (!device)
|
2006-06-26 21:41:40 -07:00
|
|
|
return -EINVAL;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
ec = acpi_driver_data(device);
|
2007-03-07 12:28:00 -07:00
|
|
|
if (!ec)
|
|
|
|
return -EINVAL;
|
2007-08-23 21:10:11 -07:00
|
|
|
|
|
|
|
/* Don't touch boot EC */
|
|
|
|
if (ec == boot_ec)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
status = acpi_remove_address_space_handler(ec->handle,
|
|
|
|
ACPI_ADR_SPACE_EC,
|
|
|
|
&acpi_ec_space_handler);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
status = acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
|
|
return -ENODEV;
|
|
|
|
|
2006-06-26 21:41:40 -07:00
|
|
|
return 0;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
int __init acpi_ec_ecdt_probe(void)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
acpi_status status;
|
2005-08-11 14:32:05 -07:00
|
|
|
struct acpi_table_ecdt *ecdt_ptr;
|
2005-07-23 01:08:00 -07:00
|
|
|
|
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
|
|
|
|
*/
|
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 14:52:48 -07:00
|
|
|
if (ACPI_SUCCESS(status)) {
|
|
|
|
printk(KERN_INFO PREFIX "EC description table is found, configuring boot EC\n\n");
|
|
|
|
boot_ec->command_addr = ecdt_ptr->control.address;
|
|
|
|
boot_ec->data_addr = ecdt_ptr->data.address;
|
|
|
|
boot_ec->gpe = ecdt_ptr->gpe;
|
|
|
|
boot_ec->handle = ACPI_ROOT_OBJECT;
|
|
|
|
} else {
|
|
|
|
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);
|
2007-08-30 22:05:26 -07:00
|
|
|
/* Check that acpi_get_devices actually find something */
|
|
|
|
if (ACPI_FAILURE(status) || !boot_ec->handle)
|
2007-08-03 14:52:48 -07:00
|
|
|
goto error;
|
|
|
|
}
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
ret = ec_install_handlers(boot_ec);
|
2007-03-07 12:28:00 -07:00
|
|
|
if (!ret) {
|
|
|
|
first_ec = boot_ec;
|
2007-03-07 12:28:00 -07:00
|
|
|
return 0;
|
2007-03-07 12:28:00 -07:00
|
|
|
}
|
2007-03-07 12:28:00 -07:00
|
|
|
error:
|
2007-03-07 12:28:00 -07:00
|
|
|
kfree(boot_ec);
|
|
|
|
boot_ec = NULL;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
2005-08-11 14:32:05 -07:00
|
|
|
static int __init acpi_ec_init(void)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
2005-08-11 14:32:05 -07:00
|
|
|
int result = 0;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
if (acpi_disabled)
|
2006-06-26 21:41:40 -07:00
|
|
|
return 0;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir);
|
|
|
|
if (!acpi_ec_dir)
|
2006-06-26 21:41:40 -07:00
|
|
|
return -ENODEV;
|
2005-04-16 15:20:36 -07:00
|
|
|
|
|
|
|
/* 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 21:41:40 -07:00
|
|
|
return -ENODEV;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
2006-06-26 21:41:40 -07:00
|
|
|
return result;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
subsys_initcall(acpi_ec_init);
|
|
|
|
|
|
|
|
/* EC driver currently not unloadable */
|
|
|
|
#if 0
|
2005-08-11 14:32:05 -07:00
|
|
|
static void __exit acpi_ec_exit(void)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
|
|
|
|
|
|
|
acpi_bus_unregister_driver(&acpi_ec_driver);
|
|
|
|
|
|
|
|
remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir);
|
|
|
|
|
2006-06-26 21:41:40 -07:00
|
|
|
return;
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
2005-08-11 14:32:05 -07:00
|
|
|
#endif /* 0 */
|
2005-04-16 15:20:36 -07:00
|
|
|
|
2005-12-05 14:33:04 -07:00
|
|
|
static int __init acpi_ec_set_intr_mode(char *str)
|
2005-07-23 01:08:00 -07:00
|
|
|
{
|
2005-12-05 14:33:04 -07:00
|
|
|
int intr;
|
2005-08-03 14:38:04 -07:00
|
|
|
|
2005-12-05 14:33:04 -07:00
|
|
|
if (!get_option(&str, &intr))
|
2005-08-03 14:38:04 -07:00
|
|
|
return 0;
|
|
|
|
|
2007-03-07 12:28:00 -07:00
|
|
|
acpi_ec_mode = (intr) ? EC_INTR : EC_POLL;
|
|
|
|
|
2007-03-07 16:29:35 -07:00
|
|
|
printk(KERN_NOTICE PREFIX "%s mode.\n", intr ? "interrupt" : "polling");
|
2006-09-26 08:50:33 -07:00
|
|
|
|
2006-03-31 03:30:33 -07:00
|
|
|
return 1;
|
2005-07-23 01:08:00 -07:00
|
|
|
}
|
2005-08-11 14:32:05 -07:00
|
|
|
|
2005-12-05 14:46:36 -07:00
|
|
|
__setup("ec_intr=", acpi_ec_set_intr_mode);
|