1597 lines
39 KiB
C
1597 lines
39 KiB
C
/*
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* acpi_ec.c - ACPI Embedded Controller Driver ($Revision: 38 $)
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*
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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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#include <linux/interrupt.h>
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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 _COMPONENT ACPI_EC_COMPONENT
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ACPI_MODULE_NAME("acpi_ec")
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#define ACPI_EC_COMPONENT 0x00100000
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#define ACPI_EC_CLASS "embedded_controller"
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#define ACPI_EC_HID "PNP0C09"
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#define ACPI_EC_DRIVER_NAME "ACPI Embedded Controller Driver"
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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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#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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#define ACPI_EC_FLAG_BURST 0x10 /* burst mode */
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#define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */
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#define ACPI_EC_EVENT_OBF 0x01 /* Output buffer full */
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#define ACPI_EC_EVENT_IBE 0x02 /* Input buffer empty */
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#define ACPI_EC_DELAY 50 /* Wait 50ms max. during EC ops */
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#define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */
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#define ACPI_EC_UDELAY 100 /* Poll @ 100us increments */
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#define ACPI_EC_UDELAY_COUNT 1000 /* Wait 10ms max. during EC ops */
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#define ACPI_EC_COMMAND_READ 0x80
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#define ACPI_EC_COMMAND_WRITE 0x81
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#define ACPI_EC_BURST_ENABLE 0x82
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#define ACPI_EC_BURST_DISABLE 0x83
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#define ACPI_EC_COMMAND_QUERY 0x84
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#define EC_POLL 0xFF
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#define EC_INTR 0x00
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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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static int acpi_ec_intr_add(struct acpi_device *device);
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static int acpi_ec_poll_add(struct acpi_device *device);
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static struct acpi_driver acpi_ec_driver = {
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.name = ACPI_EC_DRIVER_NAME,
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.class = ACPI_EC_CLASS,
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.ids = ACPI_EC_HID,
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.ops = {
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.add = acpi_ec_intr_add,
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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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};
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union acpi_ec {
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struct {
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u32 mode;
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acpi_handle handle;
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unsigned long uid;
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unsigned long gpe_bit;
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struct acpi_generic_address status_addr;
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struct acpi_generic_address command_addr;
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struct acpi_generic_address data_addr;
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unsigned long global_lock;
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} common;
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struct {
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u32 mode;
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acpi_handle handle;
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unsigned long uid;
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unsigned long gpe_bit;
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struct acpi_generic_address status_addr;
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struct acpi_generic_address command_addr;
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struct acpi_generic_address data_addr;
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unsigned long global_lock;
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unsigned int expect_event;
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atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */
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atomic_t pending_gpe;
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struct semaphore sem;
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wait_queue_head_t wait;
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} intr;
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struct {
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u32 mode;
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acpi_handle handle;
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unsigned long uid;
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unsigned long gpe_bit;
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struct acpi_generic_address status_addr;
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struct acpi_generic_address command_addr;
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struct acpi_generic_address data_addr;
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unsigned long global_lock;
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spinlock_t lock;
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} poll;
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};
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static int acpi_ec_poll_wait(union acpi_ec *ec, u8 event);
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static int acpi_ec_intr_wait(union acpi_ec *ec, unsigned int event);
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static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data);
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static int acpi_ec_intr_read(union acpi_ec *ec, u8 address, u32 * data);
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static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data);
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static int acpi_ec_intr_write(union acpi_ec *ec, u8 address, u8 data);
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static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data);
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static int acpi_ec_intr_query(union acpi_ec *ec, u32 * data);
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static void acpi_ec_gpe_poll_query(void *ec_cxt);
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static void acpi_ec_gpe_intr_query(void *ec_cxt);
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static u32 acpi_ec_gpe_poll_handler(void *data);
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static u32 acpi_ec_gpe_intr_handler(void *data);
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static acpi_status __init
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acpi_fake_ecdt_poll_callback(acpi_handle handle,
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u32 Level, void *context, void **retval);
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static acpi_status __init
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acpi_fake_ecdt_intr_callback(acpi_handle handle,
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u32 Level, void *context, void **retval);
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static int __init acpi_ec_poll_get_real_ecdt(void);
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static int __init acpi_ec_intr_get_real_ecdt(void);
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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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static union acpi_ec *ec_ecdt;
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/* External interfaces use first EC only, so remember */
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static struct acpi_device *first_ec;
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static int acpi_ec_poll_mode = EC_INTR;
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/* --------------------------------------------------------------------------
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Transaction Management
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-------------------------------------------------------------------------- */
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static u32 acpi_ec_read_status(union acpi_ec *ec)
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{
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u32 status = 0;
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acpi_hw_low_level_read(8, &status, &ec->common.status_addr);
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return status;
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}
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static int acpi_ec_wait(union acpi_ec *ec, u8 event)
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{
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if (acpi_ec_poll_mode)
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return acpi_ec_poll_wait(ec, event);
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else
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return acpi_ec_intr_wait(ec, event);
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}
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static int acpi_ec_poll_wait(union acpi_ec *ec, u8 event)
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{
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u32 acpi_ec_status = 0;
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u32 i = ACPI_EC_UDELAY_COUNT;
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if (!ec)
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return -EINVAL;
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/* Poll the EC status register waiting for the event to occur. */
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switch (event) {
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case ACPI_EC_EVENT_OBF:
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do {
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acpi_hw_low_level_read(8, &acpi_ec_status,
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&ec->common.status_addr);
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if (acpi_ec_status & ACPI_EC_FLAG_OBF)
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return 0;
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udelay(ACPI_EC_UDELAY);
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} while (--i > 0);
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break;
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case ACPI_EC_EVENT_IBE:
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do {
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acpi_hw_low_level_read(8, &acpi_ec_status,
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&ec->common.status_addr);
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if (!(acpi_ec_status & ACPI_EC_FLAG_IBF))
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return 0;
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udelay(ACPI_EC_UDELAY);
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} while (--i > 0);
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break;
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default:
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return -EINVAL;
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}
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return -ETIME;
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}
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static int acpi_ec_intr_wait(union acpi_ec *ec, unsigned int event)
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{
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int result = 0;
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ACPI_FUNCTION_TRACE("acpi_ec_wait");
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ec->intr.expect_event = event;
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smp_mb();
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switch (event) {
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case ACPI_EC_EVENT_IBE:
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if (~acpi_ec_read_status(ec) & event) {
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ec->intr.expect_event = 0;
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return_VALUE(0);
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}
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break;
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default:
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break;
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}
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result = wait_event_timeout(ec->intr.wait,
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!ec->intr.expect_event,
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msecs_to_jiffies(ACPI_EC_DELAY));
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ec->intr.expect_event = 0;
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smp_mb();
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/*
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* Verify that the event in question has actually happened by
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* querying EC status. Do the check even if operation timed-out
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* to make sure that we did not miss interrupt.
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*/
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switch (event) {
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case ACPI_EC_EVENT_OBF:
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if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_OBF)
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return_VALUE(0);
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break;
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case ACPI_EC_EVENT_IBE:
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if (~acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF)
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return_VALUE(0);
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break;
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}
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return_VALUE(-ETIME);
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}
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#ifdef ACPI_FUTURE_USAGE
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/*
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* Note: samsung nv5000 doesn't work with ec burst mode.
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* http://bugzilla.kernel.org/show_bug.cgi?id=4980
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*/
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int acpi_ec_enter_burst_mode(union acpi_ec *ec)
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{
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u32 tmp = 0;
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int status = 0;
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ACPI_FUNCTION_TRACE("acpi_ec_enter_burst_mode");
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status = acpi_ec_read_status(ec);
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if (status != -EINVAL && !(status & ACPI_EC_FLAG_BURST)) {
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status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
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if (status)
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goto end;
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acpi_hw_low_level_write(8, ACPI_EC_BURST_ENABLE,
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&ec->common.command_addr);
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status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
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acpi_hw_low_level_read(8, &tmp, &ec->common.data_addr);
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if (tmp != 0x90) { /* Burst ACK byte */
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return_VALUE(-EINVAL);
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}
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}
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atomic_set(&ec->intr.leaving_burst, 0);
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return_VALUE(0);
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end:
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printk(KERN_WARNING PREFIX "Error in acpi_ec_wait\n");
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return_VALUE(-1);
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}
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int acpi_ec_leave_burst_mode(union acpi_ec *ec)
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{
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int status = 0;
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ACPI_FUNCTION_TRACE("acpi_ec_leave_burst_mode");
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status = acpi_ec_read_status(ec);
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if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)){
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status = acpi_ec_wait(ec, ACPI_EC_FLAG_IBF);
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if(status)
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goto end;
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acpi_hw_low_level_write(8, ACPI_EC_BURST_DISABLE, &ec->common.command_addr);
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acpi_ec_wait(ec, ACPI_EC_FLAG_IBF);
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}
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atomic_set(&ec->intr.leaving_burst, 1);
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return_VALUE(0);
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end:
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printk(KERN_WARNING PREFIX "leave burst_mode:error\n");
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return_VALUE(-1);
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}
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#endif /* ACPI_FUTURE_USAGE */
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static int acpi_ec_read(union acpi_ec *ec, u8 address, u32 * data)
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{
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if (acpi_ec_poll_mode)
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return acpi_ec_poll_read(ec, address, data);
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else
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return acpi_ec_intr_read(ec, address, data);
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}
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static int acpi_ec_write(union acpi_ec *ec, u8 address, u8 data)
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{
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if (acpi_ec_poll_mode)
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return acpi_ec_poll_write(ec, address, data);
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else
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return acpi_ec_intr_write(ec, address, data);
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}
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static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data)
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{
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acpi_status status = AE_OK;
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int result = 0;
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unsigned long flags = 0;
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u32 glk = 0;
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ACPI_FUNCTION_TRACE("acpi_ec_read");
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if (!ec || !data)
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return_VALUE(-EINVAL);
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*data = 0;
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if (ec->common.global_lock) {
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status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
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if (ACPI_FAILURE(status))
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return_VALUE(-ENODEV);
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}
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spin_lock_irqsave(&ec->poll.lock, flags);
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acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ,
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&ec->common.command_addr);
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result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
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if (result)
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goto end;
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acpi_hw_low_level_write(8, address, &ec->common.data_addr);
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result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
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if (result)
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goto end;
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acpi_hw_low_level_read(8, data, &ec->common.data_addr);
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n",
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*data, address));
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end:
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spin_unlock_irqrestore(&ec->poll.lock, flags);
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if (ec->common.global_lock)
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acpi_release_global_lock(glk);
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return_VALUE(result);
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}
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static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data)
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{
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int result = 0;
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acpi_status status = AE_OK;
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unsigned long flags = 0;
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u32 glk = 0;
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ACPI_FUNCTION_TRACE("acpi_ec_write");
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if (!ec)
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return_VALUE(-EINVAL);
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if (ec->common.global_lock) {
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status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
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if (ACPI_FAILURE(status))
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return_VALUE(-ENODEV);
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}
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spin_lock_irqsave(&ec->poll.lock, flags);
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acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE,
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&ec->common.command_addr);
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result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
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if (result)
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goto end;
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acpi_hw_low_level_write(8, address, &ec->common.data_addr);
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result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
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if (result)
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goto end;
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acpi_hw_low_level_write(8, data, &ec->common.data_addr);
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result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
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if (result)
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goto end;
|
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n",
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data, address));
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end:
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spin_unlock_irqrestore(&ec->poll.lock, flags);
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|
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if (ec->common.global_lock)
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acpi_release_global_lock(glk);
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return_VALUE(result);
|
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}
|
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|
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static int acpi_ec_intr_read(union acpi_ec *ec, u8 address, u32 * data)
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{
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int status = 0;
|
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u32 glk;
|
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|
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ACPI_FUNCTION_TRACE("acpi_ec_read");
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|
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if (!ec || !data)
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return_VALUE(-EINVAL);
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|
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*data = 0;
|
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|
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if (ec->common.global_lock) {
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status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
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if (ACPI_FAILURE(status))
|
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return_VALUE(-ENODEV);
|
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}
|
|
|
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WARN_ON(in_interrupt());
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down(&ec->intr.sem);
|
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|
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status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
|
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if (status) {
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printk(KERN_DEBUG PREFIX "read EC, IB not empty\n");
|
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goto end;
|
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}
|
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acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ,
|
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&ec->common.command_addr);
|
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status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
|
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if (status) {
|
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printk(KERN_DEBUG PREFIX "read EC, IB not empty\n");
|
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}
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|
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acpi_hw_low_level_write(8, address, &ec->common.data_addr);
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status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
|
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if (status) {
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printk(KERN_DEBUG PREFIX "read EC, OB not full\n");
|
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goto end;
|
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}
|
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acpi_hw_low_level_read(8, data, &ec->common.data_addr);
|
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n",
|
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*data, address));
|
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|
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end:
|
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up(&ec->intr.sem);
|
|
|
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if (ec->common.global_lock)
|
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acpi_release_global_lock(glk);
|
|
|
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return_VALUE(status);
|
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}
|
|
|
|
static int acpi_ec_intr_write(union acpi_ec *ec, u8 address, u8 data)
|
|
{
|
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int status = 0;
|
|
u32 glk;
|
|
|
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ACPI_FUNCTION_TRACE("acpi_ec_write");
|
|
|
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if (!ec)
|
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return_VALUE(-EINVAL);
|
|
|
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if (ec->common.global_lock) {
|
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status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
|
|
if (ACPI_FAILURE(status))
|
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return_VALUE(-ENODEV);
|
|
}
|
|
|
|
WARN_ON(in_interrupt());
|
|
down(&ec->intr.sem);
|
|
|
|
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
|
|
if (status) {
|
|
printk(KERN_DEBUG PREFIX "write EC, IB not empty\n");
|
|
}
|
|
acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE,
|
|
&ec->common.command_addr);
|
|
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
|
|
if (status) {
|
|
printk(KERN_DEBUG PREFIX "write EC, IB not empty\n");
|
|
}
|
|
|
|
acpi_hw_low_level_write(8, address, &ec->common.data_addr);
|
|
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
|
|
if (status) {
|
|
printk(KERN_DEBUG PREFIX "write EC, IB not empty\n");
|
|
}
|
|
|
|
acpi_hw_low_level_write(8, data, &ec->common.data_addr);
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n",
|
|
data, address));
|
|
|
|
up(&ec->intr.sem);
|
|
|
|
if (ec->common.global_lock)
|
|
acpi_release_global_lock(glk);
|
|
|
|
return_VALUE(status);
|
|
}
|
|
|
|
/*
|
|
* Externally callable EC access functions. For now, assume 1 EC only
|
|
*/
|
|
int ec_read(u8 addr, u8 * val)
|
|
{
|
|
union acpi_ec *ec;
|
|
int err;
|
|
u32 temp_data;
|
|
|
|
if (!first_ec)
|
|
return -ENODEV;
|
|
|
|
ec = acpi_driver_data(first_ec);
|
|
|
|
err = acpi_ec_read(ec, addr, &temp_data);
|
|
|
|
if (!err) {
|
|
*val = temp_data;
|
|
return 0;
|
|
} else
|
|
return err;
|
|
}
|
|
|
|
EXPORT_SYMBOL(ec_read);
|
|
|
|
int ec_write(u8 addr, u8 val)
|
|
{
|
|
union acpi_ec *ec;
|
|
int err;
|
|
|
|
if (!first_ec)
|
|
return -ENODEV;
|
|
|
|
ec = acpi_driver_data(first_ec);
|
|
|
|
err = acpi_ec_write(ec, addr, val);
|
|
|
|
return err;
|
|
}
|
|
|
|
EXPORT_SYMBOL(ec_write);
|
|
|
|
static int acpi_ec_query(union acpi_ec *ec, u32 * data)
|
|
{
|
|
if (acpi_ec_poll_mode)
|
|
return acpi_ec_poll_query(ec, data);
|
|
else
|
|
return acpi_ec_intr_query(ec, data);
|
|
}
|
|
static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data)
|
|
{
|
|
int result = 0;
|
|
acpi_status status = AE_OK;
|
|
unsigned long flags = 0;
|
|
u32 glk = 0;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_query");
|
|
|
|
if (!ec || !data)
|
|
return_VALUE(-EINVAL);
|
|
|
|
*data = 0;
|
|
|
|
if (ec->common.global_lock) {
|
|
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
|
|
if (ACPI_FAILURE(status))
|
|
return_VALUE(-ENODEV);
|
|
}
|
|
|
|
/*
|
|
* 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).
|
|
*/
|
|
spin_lock_irqsave(&ec->poll.lock, flags);
|
|
|
|
acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY,
|
|
&ec->common.command_addr);
|
|
result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
|
|
if (result)
|
|
goto end;
|
|
|
|
acpi_hw_low_level_read(8, data, &ec->common.data_addr);
|
|
if (!*data)
|
|
result = -ENODATA;
|
|
|
|
end:
|
|
spin_unlock_irqrestore(&ec->poll.lock, flags);
|
|
|
|
if (ec->common.global_lock)
|
|
acpi_release_global_lock(glk);
|
|
|
|
return_VALUE(result);
|
|
}
|
|
static int acpi_ec_intr_query(union acpi_ec *ec, u32 * data)
|
|
{
|
|
int status = 0;
|
|
u32 glk;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_query");
|
|
|
|
if (!ec || !data)
|
|
return_VALUE(-EINVAL);
|
|
*data = 0;
|
|
|
|
if (ec->common.global_lock) {
|
|
status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
|
|
if (ACPI_FAILURE(status))
|
|
return_VALUE(-ENODEV);
|
|
}
|
|
|
|
down(&ec->intr.sem);
|
|
|
|
status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
|
|
if (status) {
|
|
printk(KERN_DEBUG PREFIX "query EC, IB not empty\n");
|
|
goto end;
|
|
}
|
|
/*
|
|
* 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).
|
|
*/
|
|
acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY,
|
|
&ec->common.command_addr);
|
|
status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
|
|
if (status) {
|
|
printk(KERN_DEBUG PREFIX "query EC, OB not full\n");
|
|
goto end;
|
|
}
|
|
|
|
acpi_hw_low_level_read(8, data, &ec->common.data_addr);
|
|
if (!*data)
|
|
status = -ENODATA;
|
|
|
|
end:
|
|
up(&ec->intr.sem);
|
|
|
|
if (ec->common.global_lock)
|
|
acpi_release_global_lock(glk);
|
|
|
|
return_VALUE(status);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Event Management
|
|
-------------------------------------------------------------------------- */
|
|
|
|
union acpi_ec_query_data {
|
|
acpi_handle handle;
|
|
u8 data;
|
|
};
|
|
|
|
static void acpi_ec_gpe_query(void *ec_cxt)
|
|
{
|
|
if (acpi_ec_poll_mode)
|
|
acpi_ec_gpe_poll_query(ec_cxt);
|
|
else
|
|
acpi_ec_gpe_intr_query(ec_cxt);
|
|
}
|
|
|
|
static void acpi_ec_gpe_poll_query(void *ec_cxt)
|
|
{
|
|
union acpi_ec *ec = (union acpi_ec *)ec_cxt;
|
|
u32 value = 0;
|
|
unsigned long flags = 0;
|
|
static char object_name[5] = { '_', 'Q', '0', '0', '\0' };
|
|
const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7',
|
|
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
|
|
};
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_gpe_query");
|
|
|
|
if (!ec_cxt)
|
|
goto end;
|
|
|
|
spin_lock_irqsave(&ec->poll.lock, flags);
|
|
acpi_hw_low_level_read(8, &value, &ec->common.command_addr);
|
|
spin_unlock_irqrestore(&ec->poll.lock, flags);
|
|
|
|
/* TBD: Implement asynch events!
|
|
* NOTE: All we care about are EC-SCI's. Other EC events are
|
|
* handled via polling (yuck!). This is because some systems
|
|
* treat EC-SCIs as level (versus EDGE!) triggered, preventing
|
|
* a purely interrupt-driven approach (grumble, grumble).
|
|
*/
|
|
if (!(value & ACPI_EC_FLAG_SCI))
|
|
goto end;
|
|
|
|
if (acpi_ec_query(ec, &value))
|
|
goto end;
|
|
|
|
object_name[2] = hex[((value >> 4) & 0x0F)];
|
|
object_name[3] = hex[(value & 0x0F)];
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name));
|
|
|
|
acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL);
|
|
|
|
end:
|
|
acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
|
|
}
|
|
static void acpi_ec_gpe_intr_query(void *ec_cxt)
|
|
{
|
|
union acpi_ec *ec = (union acpi_ec *)ec_cxt;
|
|
u32 value;
|
|
int result = -ENODATA;
|
|
static char object_name[5] = { '_', 'Q', '0', '0', '\0' };
|
|
const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7',
|
|
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
|
|
};
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_gpe_query");
|
|
|
|
if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI)
|
|
result = acpi_ec_query(ec, &value);
|
|
|
|
if (result)
|
|
goto end;
|
|
|
|
object_name[2] = hex[((value >> 4) & 0x0F)];
|
|
object_name[3] = hex[(value & 0x0F)];
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name));
|
|
|
|
acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL);
|
|
end:
|
|
atomic_dec(&ec->intr.pending_gpe);
|
|
return;
|
|
}
|
|
|
|
static u32 acpi_ec_gpe_handler(void *data)
|
|
{
|
|
if (acpi_ec_poll_mode)
|
|
return acpi_ec_gpe_poll_handler(data);
|
|
else
|
|
return acpi_ec_gpe_intr_handler(data);
|
|
}
|
|
static u32 acpi_ec_gpe_poll_handler(void *data)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
union acpi_ec *ec = (union acpi_ec *)data;
|
|
|
|
if (!ec)
|
|
return ACPI_INTERRUPT_NOT_HANDLED;
|
|
|
|
acpi_disable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
|
|
|
|
status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE,
|
|
acpi_ec_gpe_query, ec);
|
|
|
|
if (status == AE_OK)
|
|
return ACPI_INTERRUPT_HANDLED;
|
|
else
|
|
return ACPI_INTERRUPT_NOT_HANDLED;
|
|
}
|
|
static u32 acpi_ec_gpe_intr_handler(void *data)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
u32 value;
|
|
union acpi_ec *ec = (union acpi_ec *)data;
|
|
|
|
if (!ec)
|
|
return ACPI_INTERRUPT_NOT_HANDLED;
|
|
|
|
acpi_clear_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
|
|
value = acpi_ec_read_status(ec);
|
|
|
|
switch (ec->intr.expect_event) {
|
|
case ACPI_EC_EVENT_OBF:
|
|
if (!(value & ACPI_EC_FLAG_OBF))
|
|
break;
|
|
case ACPI_EC_EVENT_IBE:
|
|
if ((value & ACPI_EC_FLAG_IBF))
|
|
break;
|
|
ec->intr.expect_event = 0;
|
|
wake_up(&ec->intr.wait);
|
|
return ACPI_INTERRUPT_HANDLED;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (value & ACPI_EC_FLAG_SCI) {
|
|
atomic_add(1, &ec->intr.pending_gpe);
|
|
status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE,
|
|
acpi_ec_gpe_query, ec);
|
|
return status == AE_OK ?
|
|
ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
|
|
}
|
|
acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
|
|
return status == AE_OK ?
|
|
ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Address Space Management
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static acpi_status
|
|
acpi_ec_space_setup(acpi_handle region_handle,
|
|
u32 function, void *handler_context, void **return_context)
|
|
{
|
|
/*
|
|
* The EC object is in the handler context and is needed
|
|
* when calling the acpi_ec_space_handler.
|
|
*/
|
|
*return_context = (function != ACPI_REGION_DEACTIVATE) ?
|
|
handler_context : NULL;
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
static acpi_status
|
|
acpi_ec_space_handler(u32 function,
|
|
acpi_physical_address address,
|
|
u32 bit_width,
|
|
acpi_integer * value,
|
|
void *handler_context, void *region_context)
|
|
{
|
|
int result = 0;
|
|
union acpi_ec *ec = NULL;
|
|
u64 temp = *value;
|
|
acpi_integer f_v = 0;
|
|
int i = 0;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_space_handler");
|
|
|
|
if ((address > 0xFF) || !value || !handler_context)
|
|
return_VALUE(AE_BAD_PARAMETER);
|
|
|
|
if (bit_width != 8 && acpi_strict) {
|
|
printk(KERN_WARNING PREFIX
|
|
"acpi_ec_space_handler: bit_width should be 8\n");
|
|
return_VALUE(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
ec = (union acpi_ec *)handler_context;
|
|
|
|
next_byte:
|
|
switch (function) {
|
|
case ACPI_READ:
|
|
temp = 0;
|
|
result = acpi_ec_read(ec, (u8) address, (u32 *) & temp);
|
|
break;
|
|
case ACPI_WRITE:
|
|
result = acpi_ec_write(ec, (u8) address, (u8) temp);
|
|
break;
|
|
default:
|
|
result = -EINVAL;
|
|
goto out;
|
|
break;
|
|
}
|
|
|
|
bit_width -= 8;
|
|
if (bit_width) {
|
|
if (function == ACPI_READ)
|
|
f_v |= temp << 8 * i;
|
|
if (function == ACPI_WRITE)
|
|
temp >>= 8;
|
|
i++;
|
|
address++;
|
|
goto next_byte;
|
|
}
|
|
|
|
if (function == ACPI_READ) {
|
|
f_v |= temp << 8 * i;
|
|
*value = f_v;
|
|
}
|
|
|
|
out:
|
|
switch (result) {
|
|
case -EINVAL:
|
|
return_VALUE(AE_BAD_PARAMETER);
|
|
break;
|
|
case -ENODEV:
|
|
return_VALUE(AE_NOT_FOUND);
|
|
break;
|
|
case -ETIME:
|
|
return_VALUE(AE_TIME);
|
|
break;
|
|
default:
|
|
return_VALUE(AE_OK);
|
|
}
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
FS Interface (/proc)
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static struct proc_dir_entry *acpi_ec_dir;
|
|
|
|
static int acpi_ec_read_info(struct seq_file *seq, void *offset)
|
|
{
|
|
union acpi_ec *ec = (union acpi_ec *)seq->private;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_read_info");
|
|
|
|
if (!ec)
|
|
goto end;
|
|
|
|
seq_printf(seq, "gpe bit: 0x%02x\n",
|
|
(u32) ec->common.gpe_bit);
|
|
seq_printf(seq, "ports: 0x%02x, 0x%02x\n",
|
|
(u32) ec->common.status_addr.address,
|
|
(u32) ec->common.data_addr.address);
|
|
seq_printf(seq, "use global lock: %s\n",
|
|
ec->common.global_lock ? "yes" : "no");
|
|
acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
|
|
|
|
end:
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static int acpi_ec_info_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_ec_read_info, PDE(inode)->data);
|
|
}
|
|
|
|
static struct file_operations acpi_ec_info_ops = {
|
|
.open = acpi_ec_info_open_fs,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int acpi_ec_add_fs(struct acpi_device *device)
|
|
{
|
|
struct proc_dir_entry *entry = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_add_fs");
|
|
|
|
if (!acpi_device_dir(device)) {
|
|
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
|
|
acpi_ec_dir);
|
|
if (!acpi_device_dir(device))
|
|
return_VALUE(-ENODEV);
|
|
}
|
|
|
|
entry = create_proc_entry(ACPI_EC_FILE_INFO, S_IRUGO,
|
|
acpi_device_dir(device));
|
|
if (!entry)
|
|
ACPI_DEBUG_PRINT((ACPI_DB_WARN,
|
|
"Unable to create '%s' fs entry\n",
|
|
ACPI_EC_FILE_INFO));
|
|
else {
|
|
entry->proc_fops = &acpi_ec_info_ops;
|
|
entry->data = acpi_driver_data(device);
|
|
entry->owner = THIS_MODULE;
|
|
}
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static int acpi_ec_remove_fs(struct acpi_device *device)
|
|
{
|
|
ACPI_FUNCTION_TRACE("acpi_ec_remove_fs");
|
|
|
|
if (acpi_device_dir(device)) {
|
|
remove_proc_entry(ACPI_EC_FILE_INFO, acpi_device_dir(device));
|
|
remove_proc_entry(acpi_device_bid(device), acpi_ec_dir);
|
|
acpi_device_dir(device) = NULL;
|
|
}
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Interface
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int acpi_ec_poll_add(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
acpi_status status = AE_OK;
|
|
union acpi_ec *ec = NULL;
|
|
unsigned long uid;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_add");
|
|
|
|
if (!device)
|
|
return_VALUE(-EINVAL);
|
|
|
|
ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
|
|
if (!ec)
|
|
return_VALUE(-ENOMEM);
|
|
memset(ec, 0, sizeof(union acpi_ec));
|
|
|
|
ec->common.handle = device->handle;
|
|
ec->common.uid = -1;
|
|
spin_lock_init(&ec->poll.lock);
|
|
strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_EC_CLASS);
|
|
acpi_driver_data(device) = ec;
|
|
|
|
/* Use the global lock for all EC transactions? */
|
|
acpi_evaluate_integer(ec->common.handle, "_GLK", NULL,
|
|
&ec->common.global_lock);
|
|
|
|
/* If our UID matches the UID for the ECDT-enumerated EC,
|
|
we now have the *real* EC info, so kill the makeshift one. */
|
|
acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid);
|
|
if (ec_ecdt && ec_ecdt->common.uid == uid) {
|
|
acpi_remove_address_space_handler(ACPI_ROOT_OBJECT,
|
|
ACPI_ADR_SPACE_EC,
|
|
&acpi_ec_space_handler);
|
|
|
|
acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
|
|
&acpi_ec_gpe_handler);
|
|
|
|
kfree(ec_ecdt);
|
|
}
|
|
|
|
/* Get GPE bit assignment (EC events). */
|
|
/* TODO: Add support for _GPE returning a package */
|
|
status =
|
|
acpi_evaluate_integer(ec->common.handle, "_GPE", NULL,
|
|
&ec->common.gpe_bit);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Error obtaining GPE bit assignment\n"));
|
|
result = -ENODEV;
|
|
goto end;
|
|
}
|
|
|
|
result = acpi_ec_add_fs(device);
|
|
if (result)
|
|
goto end;
|
|
|
|
printk(KERN_INFO PREFIX "%s [%s] (gpe %d) polling mode.\n",
|
|
acpi_device_name(device), acpi_device_bid(device),
|
|
(u32) ec->common.gpe_bit);
|
|
|
|
if (!first_ec)
|
|
first_ec = device;
|
|
|
|
end:
|
|
if (result)
|
|
kfree(ec);
|
|
|
|
return_VALUE(result);
|
|
}
|
|
static int acpi_ec_intr_add(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
acpi_status status = AE_OK;
|
|
union acpi_ec *ec = NULL;
|
|
unsigned long uid;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_add");
|
|
|
|
if (!device)
|
|
return_VALUE(-EINVAL);
|
|
|
|
ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
|
|
if (!ec)
|
|
return_VALUE(-ENOMEM);
|
|
memset(ec, 0, sizeof(union acpi_ec));
|
|
|
|
ec->common.handle = device->handle;
|
|
ec->common.uid = -1;
|
|
atomic_set(&ec->intr.pending_gpe, 0);
|
|
atomic_set(&ec->intr.leaving_burst, 1);
|
|
init_MUTEX(&ec->intr.sem);
|
|
init_waitqueue_head(&ec->intr.wait);
|
|
strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_EC_CLASS);
|
|
acpi_driver_data(device) = ec;
|
|
|
|
/* Use the global lock for all EC transactions? */
|
|
acpi_evaluate_integer(ec->common.handle, "_GLK", NULL,
|
|
&ec->common.global_lock);
|
|
|
|
/* If our UID matches the UID for the ECDT-enumerated EC,
|
|
we now have the *real* EC info, so kill the makeshift one. */
|
|
acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid);
|
|
if (ec_ecdt && ec_ecdt->common.uid == uid) {
|
|
acpi_remove_address_space_handler(ACPI_ROOT_OBJECT,
|
|
ACPI_ADR_SPACE_EC,
|
|
&acpi_ec_space_handler);
|
|
|
|
acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
|
|
&acpi_ec_gpe_handler);
|
|
|
|
kfree(ec_ecdt);
|
|
}
|
|
|
|
/* Get GPE bit assignment (EC events). */
|
|
/* TODO: Add support for _GPE returning a package */
|
|
status =
|
|
acpi_evaluate_integer(ec->common.handle, "_GPE", NULL,
|
|
&ec->common.gpe_bit);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Error obtaining GPE bit assignment\n"));
|
|
result = -ENODEV;
|
|
goto end;
|
|
}
|
|
|
|
result = acpi_ec_add_fs(device);
|
|
if (result)
|
|
goto end;
|
|
|
|
printk(KERN_INFO PREFIX "%s [%s] (gpe %d) interrupt mode.\n",
|
|
acpi_device_name(device), acpi_device_bid(device),
|
|
(u32) ec->common.gpe_bit);
|
|
|
|
if (!first_ec)
|
|
first_ec = device;
|
|
|
|
end:
|
|
if (result)
|
|
kfree(ec);
|
|
|
|
return_VALUE(result);
|
|
}
|
|
|
|
static int acpi_ec_remove(struct acpi_device *device, int type)
|
|
{
|
|
union acpi_ec *ec = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_remove");
|
|
|
|
if (!device)
|
|
return_VALUE(-EINVAL);
|
|
|
|
ec = acpi_driver_data(device);
|
|
|
|
acpi_ec_remove_fs(device);
|
|
|
|
kfree(ec);
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static acpi_status
|
|
acpi_ec_io_ports(struct acpi_resource *resource, void *context)
|
|
{
|
|
union acpi_ec *ec = (union acpi_ec *)context;
|
|
struct acpi_generic_address *addr;
|
|
|
|
if (resource->type != ACPI_RESOURCE_TYPE_IO) {
|
|
return AE_OK;
|
|
}
|
|
|
|
/*
|
|
* The first address region returned is the data port, and
|
|
* the second address region returned is the status/command
|
|
* port.
|
|
*/
|
|
if (ec->common.data_addr.register_bit_width == 0) {
|
|
addr = &ec->common.data_addr;
|
|
} else if (ec->common.command_addr.register_bit_width == 0) {
|
|
addr = &ec->common.command_addr;
|
|
} else {
|
|
return AE_CTRL_TERMINATE;
|
|
}
|
|
|
|
addr->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO;
|
|
addr->register_bit_width = 8;
|
|
addr->register_bit_offset = 0;
|
|
addr->address = resource->data.io.minimum;
|
|
|
|
return AE_OK;
|
|
}
|
|
|
|
static int acpi_ec_start(struct acpi_device *device)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
union acpi_ec *ec = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_start");
|
|
|
|
if (!device)
|
|
return_VALUE(-EINVAL);
|
|
|
|
ec = acpi_driver_data(device);
|
|
|
|
if (!ec)
|
|
return_VALUE(-EINVAL);
|
|
|
|
/*
|
|
* Get I/O port addresses. Convert to GAS format.
|
|
*/
|
|
status = acpi_walk_resources(ec->common.handle, METHOD_NAME__CRS,
|
|
acpi_ec_io_ports, ec);
|
|
if (ACPI_FAILURE(status)
|
|
|| ec->common.command_addr.register_bit_width == 0) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Error getting I/O port addresses"));
|
|
return_VALUE(-ENODEV);
|
|
}
|
|
|
|
ec->common.status_addr = ec->common.command_addr;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x\n",
|
|
(u32) ec->common.gpe_bit,
|
|
(u32) ec->common.command_addr.address,
|
|
(u32) ec->common.data_addr.address));
|
|
|
|
/*
|
|
* Install GPE handler
|
|
*/
|
|
status = acpi_install_gpe_handler(NULL, ec->common.gpe_bit,
|
|
ACPI_GPE_EDGE_TRIGGERED,
|
|
&acpi_ec_gpe_handler, ec);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_VALUE(-ENODEV);
|
|
}
|
|
acpi_set_gpe_type(NULL, ec->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME);
|
|
acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
|
|
|
|
status = acpi_install_address_space_handler(ec->common.handle,
|
|
ACPI_ADR_SPACE_EC,
|
|
&acpi_ec_space_handler,
|
|
&acpi_ec_space_setup, ec);
|
|
if (ACPI_FAILURE(status)) {
|
|
acpi_remove_gpe_handler(NULL, ec->common.gpe_bit,
|
|
&acpi_ec_gpe_handler);
|
|
return_VALUE(-ENODEV);
|
|
}
|
|
|
|
return_VALUE(AE_OK);
|
|
}
|
|
|
|
static int acpi_ec_stop(struct acpi_device *device, int type)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
union acpi_ec *ec = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_stop");
|
|
|
|
if (!device)
|
|
return_VALUE(-EINVAL);
|
|
|
|
ec = acpi_driver_data(device);
|
|
|
|
status = acpi_remove_address_space_handler(ec->common.handle,
|
|
ACPI_ADR_SPACE_EC,
|
|
&acpi_ec_space_handler);
|
|
if (ACPI_FAILURE(status))
|
|
return_VALUE(-ENODEV);
|
|
|
|
status =
|
|
acpi_remove_gpe_handler(NULL, ec->common.gpe_bit,
|
|
&acpi_ec_gpe_handler);
|
|
if (ACPI_FAILURE(status))
|
|
return_VALUE(-ENODEV);
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static acpi_status __init
|
|
acpi_fake_ecdt_callback(acpi_handle handle,
|
|
u32 Level, void *context, void **retval)
|
|
{
|
|
|
|
if (acpi_ec_poll_mode)
|
|
return acpi_fake_ecdt_poll_callback(handle,
|
|
Level, context, retval);
|
|
else
|
|
return acpi_fake_ecdt_intr_callback(handle,
|
|
Level, context, retval);
|
|
}
|
|
|
|
static acpi_status __init
|
|
acpi_fake_ecdt_poll_callback(acpi_handle handle,
|
|
u32 Level, void *context, void **retval)
|
|
{
|
|
acpi_status status;
|
|
|
|
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
|
|
acpi_ec_io_ports, ec_ecdt);
|
|
if (ACPI_FAILURE(status))
|
|
return status;
|
|
ec_ecdt->common.status_addr = ec_ecdt->common.command_addr;
|
|
|
|
ec_ecdt->common.uid = -1;
|
|
acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid);
|
|
|
|
status =
|
|
acpi_evaluate_integer(handle, "_GPE", NULL,
|
|
&ec_ecdt->common.gpe_bit);
|
|
if (ACPI_FAILURE(status))
|
|
return status;
|
|
spin_lock_init(&ec_ecdt->poll.lock);
|
|
ec_ecdt->common.global_lock = TRUE;
|
|
ec_ecdt->common.handle = handle;
|
|
|
|
printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n",
|
|
(u32) ec_ecdt->common.gpe_bit,
|
|
(u32) ec_ecdt->common.command_addr.address,
|
|
(u32) ec_ecdt->common.data_addr.address);
|
|
|
|
return AE_CTRL_TERMINATE;
|
|
}
|
|
|
|
static acpi_status __init
|
|
acpi_fake_ecdt_intr_callback(acpi_handle handle,
|
|
u32 Level, void *context, void **retval)
|
|
{
|
|
acpi_status status;
|
|
|
|
init_MUTEX(&ec_ecdt->intr.sem);
|
|
init_waitqueue_head(&ec_ecdt->intr.wait);
|
|
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
|
|
acpi_ec_io_ports, ec_ecdt);
|
|
if (ACPI_FAILURE(status))
|
|
return status;
|
|
ec_ecdt->common.status_addr = ec_ecdt->common.command_addr;
|
|
|
|
ec_ecdt->common.uid = -1;
|
|
acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid);
|
|
|
|
status =
|
|
acpi_evaluate_integer(handle, "_GPE", NULL,
|
|
&ec_ecdt->common.gpe_bit);
|
|
if (ACPI_FAILURE(status))
|
|
return status;
|
|
ec_ecdt->common.global_lock = TRUE;
|
|
ec_ecdt->common.handle = handle;
|
|
|
|
printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n",
|
|
(u32) ec_ecdt->common.gpe_bit,
|
|
(u32) ec_ecdt->common.command_addr.address,
|
|
(u32) ec_ecdt->common.data_addr.address);
|
|
|
|
return AE_CTRL_TERMINATE;
|
|
}
|
|
|
|
/*
|
|
* Some BIOS (such as some from Gateway laptops) access EC region very early
|
|
* such as in BAT0._INI or EC._INI before an EC device is found and
|
|
* do not provide an ECDT. According to ACPI spec, ECDT isn't mandatorily
|
|
* required, but if EC regison is accessed early, it is required.
|
|
* The routine tries to workaround the BIOS bug by pre-scan EC device
|
|
* It assumes that _CRS, _HID, _GPE, _UID methods of EC don't touch any
|
|
* op region (since _REG isn't invoked yet). The assumption is true for
|
|
* all systems found.
|
|
*/
|
|
static int __init acpi_ec_fake_ecdt(void)
|
|
{
|
|
acpi_status status;
|
|
int ret = 0;
|
|
|
|
printk(KERN_INFO PREFIX "Try to make an fake ECDT\n");
|
|
|
|
ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
|
|
if (!ec_ecdt) {
|
|
ret = -ENOMEM;
|
|
goto error;
|
|
}
|
|
memset(ec_ecdt, 0, sizeof(union acpi_ec));
|
|
|
|
status = acpi_get_devices(ACPI_EC_HID,
|
|
acpi_fake_ecdt_callback, NULL, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
kfree(ec_ecdt);
|
|
ec_ecdt = NULL;
|
|
ret = -ENODEV;
|
|
goto error;
|
|
}
|
|
return 0;
|
|
error:
|
|
printk(KERN_ERR PREFIX "Can't make an fake ECDT\n");
|
|
return ret;
|
|
}
|
|
|
|
static int __init acpi_ec_get_real_ecdt(void)
|
|
{
|
|
if (acpi_ec_poll_mode)
|
|
return acpi_ec_poll_get_real_ecdt();
|
|
else
|
|
return acpi_ec_intr_get_real_ecdt();
|
|
}
|
|
|
|
static int __init acpi_ec_poll_get_real_ecdt(void)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_table_ecdt *ecdt_ptr;
|
|
|
|
status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING,
|
|
(struct acpi_table_header **)
|
|
&ecdt_ptr);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
printk(KERN_INFO PREFIX "Found ECDT\n");
|
|
|
|
/*
|
|
* Generate a temporary ec context to use until the namespace is scanned
|
|
*/
|
|
ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
|
|
if (!ec_ecdt)
|
|
return -ENOMEM;
|
|
memset(ec_ecdt, 0, sizeof(union acpi_ec));
|
|
|
|
ec_ecdt->common.command_addr = ecdt_ptr->ec_control;
|
|
ec_ecdt->common.status_addr = ecdt_ptr->ec_control;
|
|
ec_ecdt->common.data_addr = ecdt_ptr->ec_data;
|
|
ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit;
|
|
spin_lock_init(&ec_ecdt->poll.lock);
|
|
/* use the GL just to be safe */
|
|
ec_ecdt->common.global_lock = TRUE;
|
|
ec_ecdt->common.uid = ecdt_ptr->uid;
|
|
|
|
status =
|
|
acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
error:
|
|
printk(KERN_ERR PREFIX "Could not use ECDT\n");
|
|
kfree(ec_ecdt);
|
|
ec_ecdt = NULL;
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int __init acpi_ec_intr_get_real_ecdt(void)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_table_ecdt *ecdt_ptr;
|
|
|
|
status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING,
|
|
(struct acpi_table_header **)
|
|
&ecdt_ptr);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
printk(KERN_INFO PREFIX "Found ECDT\n");
|
|
|
|
/*
|
|
* Generate a temporary ec context to use until the namespace is scanned
|
|
*/
|
|
ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
|
|
if (!ec_ecdt)
|
|
return -ENOMEM;
|
|
memset(ec_ecdt, 0, sizeof(union acpi_ec));
|
|
|
|
init_MUTEX(&ec_ecdt->intr.sem);
|
|
init_waitqueue_head(&ec_ecdt->intr.wait);
|
|
ec_ecdt->common.command_addr = ecdt_ptr->ec_control;
|
|
ec_ecdt->common.status_addr = ecdt_ptr->ec_control;
|
|
ec_ecdt->common.data_addr = ecdt_ptr->ec_data;
|
|
ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit;
|
|
/* use the GL just to be safe */
|
|
ec_ecdt->common.global_lock = TRUE;
|
|
ec_ecdt->common.uid = ecdt_ptr->uid;
|
|
|
|
status =
|
|
acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
error:
|
|
printk(KERN_ERR PREFIX "Could not use ECDT\n");
|
|
kfree(ec_ecdt);
|
|
ec_ecdt = NULL;
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int __initdata acpi_fake_ecdt_enabled;
|
|
int __init acpi_ec_ecdt_probe(void)
|
|
{
|
|
acpi_status status;
|
|
int ret;
|
|
|
|
ret = acpi_ec_get_real_ecdt();
|
|
/* Try to make a fake ECDT */
|
|
if (ret && acpi_fake_ecdt_enabled) {
|
|
ret = acpi_ec_fake_ecdt();
|
|
}
|
|
|
|
if (ret)
|
|
return 0;
|
|
|
|
/*
|
|
* Install GPE handler
|
|
*/
|
|
status = acpi_install_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
|
|
ACPI_GPE_EDGE_TRIGGERED,
|
|
&acpi_ec_gpe_handler, ec_ecdt);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto error;
|
|
}
|
|
acpi_set_gpe_type(NULL, ec_ecdt->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME);
|
|
acpi_enable_gpe(NULL, ec_ecdt->common.gpe_bit, ACPI_NOT_ISR);
|
|
|
|
status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT,
|
|
ACPI_ADR_SPACE_EC,
|
|
&acpi_ec_space_handler,
|
|
&acpi_ec_space_setup,
|
|
ec_ecdt);
|
|
if (ACPI_FAILURE(status)) {
|
|
acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
|
|
&acpi_ec_gpe_handler);
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
printk(KERN_ERR PREFIX "Could not use ECDT\n");
|
|
kfree(ec_ecdt);
|
|
ec_ecdt = NULL;
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
static int __init acpi_ec_init(void)
|
|
{
|
|
int result = 0;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_ec_init");
|
|
|
|
if (acpi_disabled)
|
|
return_VALUE(0);
|
|
|
|
acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir);
|
|
if (!acpi_ec_dir)
|
|
return_VALUE(-ENODEV);
|
|
|
|
/* Now register the driver for the EC */
|
|
result = acpi_bus_register_driver(&acpi_ec_driver);
|
|
if (result < 0) {
|
|
remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir);
|
|
return_VALUE(-ENODEV);
|
|
}
|
|
|
|
return_VALUE(result);
|
|
}
|
|
|
|
subsys_initcall(acpi_ec_init);
|
|
|
|
/* EC driver currently not unloadable */
|
|
#if 0
|
|
static void __exit acpi_ec_exit(void)
|
|
{
|
|
ACPI_FUNCTION_TRACE("acpi_ec_exit");
|
|
|
|
acpi_bus_unregister_driver(&acpi_ec_driver);
|
|
|
|
remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir);
|
|
|
|
return_VOID;
|
|
}
|
|
#endif /* 0 */
|
|
|
|
static int __init acpi_fake_ecdt_setup(char *str)
|
|
{
|
|
acpi_fake_ecdt_enabled = 1;
|
|
return 0;
|
|
}
|
|
|
|
__setup("acpi_fake_ecdt", acpi_fake_ecdt_setup);
|
|
static int __init acpi_ec_set_intr_mode(char *str)
|
|
{
|
|
int intr;
|
|
|
|
if (!get_option(&str, &intr))
|
|
return 0;
|
|
|
|
if (intr) {
|
|
acpi_ec_poll_mode = EC_INTR;
|
|
acpi_ec_driver.ops.add = acpi_ec_intr_add;
|
|
} else {
|
|
acpi_ec_poll_mode = EC_POLL;
|
|
acpi_ec_driver.ops.add = acpi_ec_poll_add;
|
|
}
|
|
printk(KERN_INFO PREFIX "EC %s mode.\n", intr ? "interrupt" : "polling");
|
|
return 0;
|
|
}
|
|
|
|
__setup("ec_intr=", acpi_ec_set_intr_mode);
|