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drivers/acpi/ec.c
27.1 KB
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/* |
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* ec.c - ACPI Embedded Controller Driver (v2.1) |
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* |
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* Copyright (C) 2006-2008 Alexey Starikovskiy <astarikovskiy@suse.de> |
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* Copyright (C) 2006 Denis Sadykov <denis.m.sadykov@intel.com> |
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* Copyright (C) 2004 Luming Yu <luming.yu@intel.com> * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ |
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/* Uncomment next line to get verbose printout */ |
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/* #define DEBUG */ |
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#include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/types.h> #include <linux/delay.h> |
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#include <linux/interrupt.h> |
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#include <linux/list.h> |
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#include <linux/spinlock.h> |
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#include <linux/slab.h> |
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#include <asm/io.h> #include <acpi/acpi_bus.h> #include <acpi/acpi_drivers.h> |
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#include <linux/dmi.h> |
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|
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#include "internal.h" |
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#define ACPI_EC_CLASS "embedded_controller" |
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#define ACPI_EC_DEVICE_NAME "Embedded Controller" #define ACPI_EC_FILE_INFO "info" |
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|
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#undef PREFIX |
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#define PREFIX "ACPI: EC: " |
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|
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/* EC status register */ |
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#define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */ #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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|
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/* EC commands */ |
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enum ec_command { |
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ACPI_EC_COMMAND_READ = 0x80, ACPI_EC_COMMAND_WRITE = 0x81, ACPI_EC_BURST_ENABLE = 0x82, ACPI_EC_BURST_DISABLE = 0x83, ACPI_EC_COMMAND_QUERY = 0x84, |
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}; |
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|
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#define ACPI_EC_DELAY 500 /* Wait 500ms 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_MSI_UDELAY 550 /* Wait 550us for MSI EC */ |
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|
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#define ACPI_EC_STORM_THRESHOLD 8 /* number of false interrupts |
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per one transaction */ |
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enum { |
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EC_FLAGS_QUERY_PENDING, /* Query is pending */ |
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EC_FLAGS_GPE_STORM, /* GPE storm detected */ |
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EC_FLAGS_HANDLERS_INSTALLED, /* Handlers for GPE and |
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* OpReg are installed */ |
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EC_FLAGS_BLOCKED, /* Transactions are blocked */ |
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}; |
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|
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/* ec.c is compiled in acpi namespace so this shows up as acpi.ec_delay param */ static unsigned int ec_delay __read_mostly = ACPI_EC_DELAY; module_param(ec_delay, uint, 0644); MODULE_PARM_DESC(ec_delay, "Timeout(ms) waited until an EC command completes"); |
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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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/* External interfaces use first EC only, so remember */ |
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typedef int (*acpi_ec_query_func) (void *data); struct acpi_ec_query_handler { struct list_head node; acpi_ec_query_func func; acpi_handle handle; void *data; u8 query_bit; }; |
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struct transaction { |
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const u8 *wdata; u8 *rdata; unsigned short irq_count; |
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u8 command; |
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u8 wi; u8 ri; |
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u8 wlen; u8 rlen; |
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bool done; |
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}; |
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struct acpi_ec *boot_ec, *first_ec; EXPORT_SYMBOL(first_ec); |
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|
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static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */ |
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static int EC_FLAGS_VALIDATE_ECDT; /* ASUStec ECDTs need to be validated */ |
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static int EC_FLAGS_SKIP_DSDT_SCAN; /* Not all BIOS survive early DSDT scan */ |
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|
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/* -------------------------------------------------------------------------- Transaction Management -------------------------------------------------------------------------- */ |
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static inline u8 acpi_ec_read_status(struct acpi_ec *ec) |
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{ |
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u8 x = inb(ec->command_addr); |
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pr_debug(PREFIX "---> status = 0x%2.2x ", x); |
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return x; |
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} |
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static inline u8 acpi_ec_read_data(struct acpi_ec *ec) |
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{ |
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u8 x = inb(ec->data_addr); |
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pr_debug(PREFIX "---> data = 0x%2.2x ", x); |
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return x; |
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} |
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static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command) |
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{ |
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pr_debug(PREFIX "<--- command = 0x%2.2x ", command); |
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outb(command, ec->command_addr); |
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} |
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static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data) |
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{ |
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pr_debug(PREFIX "<--- data = 0x%2.2x ", data); |
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outb(data, ec->data_addr); |
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} |
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|
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static int ec_transaction_done(struct acpi_ec *ec) |
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{ |
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unsigned long flags; int ret = 0; |
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spin_lock_irqsave(&ec->curr_lock, flags); |
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if (!ec->curr || ec->curr->done) |
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ret = 1; |
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spin_unlock_irqrestore(&ec->curr_lock, flags); |
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return ret; |
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} |
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|
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static void start_transaction(struct acpi_ec *ec) { ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0; ec->curr->done = false; acpi_ec_write_cmd(ec, ec->curr->command); } |
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static void advance_transaction(struct acpi_ec *ec, u8 status) |
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{ |
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unsigned long flags; |
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spin_lock_irqsave(&ec->curr_lock, flags); if (!ec->curr) |
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goto unlock; |
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if (ec->curr->wlen > ec->curr->wi) { if ((status & ACPI_EC_FLAG_IBF) == 0) acpi_ec_write_data(ec, ec->curr->wdata[ec->curr->wi++]); else |
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goto err; |
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} else if (ec->curr->rlen > ec->curr->ri) { |
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if ((status & ACPI_EC_FLAG_OBF) == 1) { |
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ec->curr->rdata[ec->curr->ri++] = acpi_ec_read_data(ec); if (ec->curr->rlen == ec->curr->ri) |
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ec->curr->done = true; |
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} else |
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goto err; |
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} else if (ec->curr->wlen == ec->curr->wi && (status & ACPI_EC_FLAG_IBF) == 0) |
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ec->curr->done = true; goto unlock; err: /* false interrupt, state didn't change */ |
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if (in_interrupt()) ++ec->curr->irq_count; |
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unlock: |
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spin_unlock_irqrestore(&ec->curr_lock, flags); |
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} |
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|
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static int acpi_ec_sync_query(struct acpi_ec *ec); |
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|
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static int ec_check_sci_sync(struct acpi_ec *ec, u8 state) |
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{ |
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if (state & ACPI_EC_FLAG_SCI) { if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) |
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return acpi_ec_sync_query(ec); |
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} return 0; } static int ec_poll(struct acpi_ec *ec) { |
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unsigned long flags; int repeat = 2; /* number of command restarts */ while (repeat--) { unsigned long delay = jiffies + |
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msecs_to_jiffies(ec_delay); |
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do { /* don't sleep with disabled interrupts */ if (EC_FLAGS_MSI || irqs_disabled()) { udelay(ACPI_EC_MSI_UDELAY); if (ec_transaction_done(ec)) return 0; } else { if (wait_event_timeout(ec->wait, ec_transaction_done(ec), msecs_to_jiffies(1))) return 0; } advance_transaction(ec, acpi_ec_read_status(ec)); } while (time_before(jiffies, delay)); |
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if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) |
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break; |
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pr_debug(PREFIX "controller reset, restart transaction "); spin_lock_irqsave(&ec->curr_lock, flags); start_transaction(ec); spin_unlock_irqrestore(&ec->curr_lock, flags); |
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} |
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return -ETIME; |
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} |
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static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, |
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struct transaction *t) |
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{ |
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unsigned long tmp; |
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int ret = 0; |
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if (EC_FLAGS_MSI) |
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udelay(ACPI_EC_MSI_UDELAY); |
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/* start transaction */ |
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spin_lock_irqsave(&ec->curr_lock, tmp); |
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/* following two actions should be kept atomic */ |
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ec->curr = t; |
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start_transaction(ec); |
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if (ec->curr->command == ACPI_EC_COMMAND_QUERY) |
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clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); |
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spin_unlock_irqrestore(&ec->curr_lock, tmp); |
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ret = ec_poll(ec); |
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spin_lock_irqsave(&ec->curr_lock, tmp); ec->curr = NULL; spin_unlock_irqrestore(&ec->curr_lock, tmp); |
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return ret; } static int ec_check_ibf0(struct acpi_ec *ec) { u8 status = acpi_ec_read_status(ec); return (status & ACPI_EC_FLAG_IBF) == 0; |
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} |
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static int ec_wait_ibf0(struct acpi_ec *ec) { |
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unsigned long delay = jiffies + msecs_to_jiffies(ec_delay); |
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/* interrupt wait manually if GPE mode is not active */ |
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while (time_before(jiffies, delay)) |
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if (wait_event_timeout(ec->wait, ec_check_ibf0(ec), msecs_to_jiffies(1))) |
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return 0; return -ETIME; |
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} |
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static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t) |
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{ |
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int status; |
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u32 glk; |
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if (!ec || (!t) || (t->wlen && !t->wdata) || (t->rlen && !t->rdata)) |
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return -EINVAL; |
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if (t->rdata) memset(t->rdata, 0, t->rlen); |
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mutex_lock(&ec->lock); |
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if (test_bit(EC_FLAGS_BLOCKED, &ec->flags)) { |
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status = -EINVAL; goto unlock; } |
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if (ec->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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status = -ENODEV; goto unlock; |
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} |
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} |
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if (ec_wait_ibf0(ec)) { |
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pr_err(PREFIX "input buffer is not empty, " "aborting transaction "); |
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status = -ETIME; |
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goto end; |
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} |
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pr_debug(PREFIX "transaction start "); /* disable GPE during transaction if storm is detected */ if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { |
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/* It has to be disabled, so that it doesn't trigger. */ acpi_disable_gpe(NULL, ec->gpe); |
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} |
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status = acpi_ec_transaction_unlocked(ec, t); |
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/* check if we received SCI during transaction */ ec_check_sci_sync(ec, acpi_ec_read_status(ec)); if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { |
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msleep(1); |
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/* It is safe to enable the GPE outside of the transaction. */ acpi_enable_gpe(NULL, ec->gpe); |
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} else if (t->irq_count > ACPI_EC_STORM_THRESHOLD) { pr_info(PREFIX "GPE storm detected, " "transactions will use polling mode "); set_bit(EC_FLAGS_GPE_STORM, &ec->flags); } |
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pr_debug(PREFIX "transaction end "); |
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end: |
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if (ec->global_lock) |
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acpi_release_global_lock(glk); |
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unlock: |
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mutex_unlock(&ec->lock); |
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return status; |
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} |
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static int acpi_ec_burst_enable(struct acpi_ec *ec) |
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{ u8 d; |
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struct transaction t = {.command = ACPI_EC_BURST_ENABLE, .wdata = NULL, .rdata = &d, .wlen = 0, .rlen = 1}; |
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return acpi_ec_transaction(ec, &t); |
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} |
8a383ef0b ACPI: ec.c, pci_l... |
336 |
static int acpi_ec_burst_disable(struct acpi_ec *ec) |
c45aac43f ACPI: EC: enable ... |
337 |
{ |
8463200a0 ACPI: EC: Rename ... |
338 339 340 |
struct transaction t = {.command = ACPI_EC_BURST_DISABLE, .wdata = NULL, .rdata = NULL, .wlen = 0, .rlen = 0}; |
7c6db4e05 ACPI: EC: do tran... |
341 |
return (acpi_ec_read_status(ec) & ACPI_EC_FLAG_BURST) ? |
2a84cb985 ACPI: EC: Merge I... |
342 |
acpi_ec_transaction(ec, &t) : 0; |
c45aac43f ACPI: EC: enable ... |
343 |
} |
6ccedb10e ACPI: ec: Lindent... |
344 |
static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data) |
3576cf619 ACPI: EC: Unify p... |
345 346 347 |
{ int result; u8 d; |
8463200a0 ACPI: EC: Rename ... |
348 349 350 |
struct transaction t = {.command = ACPI_EC_COMMAND_READ, .wdata = &address, .rdata = &d, .wlen = 1, .rlen = 1}; |
3576cf619 ACPI: EC: Unify p... |
351 |
|
2a84cb985 ACPI: EC: Merge I... |
352 |
result = acpi_ec_transaction(ec, &t); |
3576cf619 ACPI: EC: Unify p... |
353 354 355 |
*data = d; return result; } |
6ffb221a8 ACPI: EC: Simplif... |
356 |
|
3576cf619 ACPI: EC: Unify p... |
357 358 |
static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data) { |
6ccedb10e ACPI: ec: Lindent... |
359 |
u8 wdata[2] = { address, data }; |
8463200a0 ACPI: EC: Rename ... |
360 361 362 |
struct transaction t = {.command = ACPI_EC_COMMAND_WRITE, .wdata = wdata, .rdata = NULL, .wlen = 2, .rlen = 0}; |
2a84cb985 ACPI: EC: Merge I... |
363 |
return acpi_ec_transaction(ec, &t); |
3576cf619 ACPI: EC: Unify p... |
364 |
} |
1da177e4c Linux-2.6.12-rc2 |
365 366 367 |
/* * Externally callable EC access functions. For now, assume 1 EC only */ |
c45aac43f ACPI: EC: enable ... |
368 369 |
int ec_burst_enable(void) { |
c45aac43f ACPI: EC: enable ... |
370 371 |
if (!first_ec) return -ENODEV; |
d033879c9 ACPI: EC: first_e... |
372 |
return acpi_ec_burst_enable(first_ec); |
c45aac43f ACPI: EC: enable ... |
373 374 375 376 377 378 |
} EXPORT_SYMBOL(ec_burst_enable); int ec_burst_disable(void) { |
c45aac43f ACPI: EC: enable ... |
379 380 |
if (!first_ec) return -ENODEV; |
d033879c9 ACPI: EC: first_e... |
381 |
return acpi_ec_burst_disable(first_ec); |
c45aac43f ACPI: EC: enable ... |
382 383 384 |
} EXPORT_SYMBOL(ec_burst_disable); |
6ccedb10e ACPI: ec: Lindent... |
385 |
int ec_read(u8 addr, u8 * val) |
1da177e4c Linux-2.6.12-rc2 |
386 |
{ |
1da177e4c Linux-2.6.12-rc2 |
387 |
int err; |
6ffb221a8 ACPI: EC: Simplif... |
388 |
u8 temp_data; |
1da177e4c Linux-2.6.12-rc2 |
389 390 391 |
if (!first_ec) return -ENODEV; |
d033879c9 ACPI: EC: first_e... |
392 |
err = acpi_ec_read(first_ec, addr, &temp_data); |
1da177e4c Linux-2.6.12-rc2 |
393 394 395 396 |
if (!err) { *val = temp_data; return 0; |
50526df60 [ACPI] Lindent dr... |
397 |
} else |
1da177e4c Linux-2.6.12-rc2 |
398 399 |
return err; } |
50526df60 [ACPI] Lindent dr... |
400 |
|
1da177e4c Linux-2.6.12-rc2 |
401 |
EXPORT_SYMBOL(ec_read); |
50526df60 [ACPI] Lindent dr... |
402 |
int ec_write(u8 addr, u8 val) |
1da177e4c Linux-2.6.12-rc2 |
403 |
{ |
1da177e4c Linux-2.6.12-rc2 |
404 405 406 407 |
int err; if (!first_ec) return -ENODEV; |
d033879c9 ACPI: EC: first_e... |
408 |
err = acpi_ec_write(first_ec, addr, val); |
1da177e4c Linux-2.6.12-rc2 |
409 410 411 |
return err; } |
50526df60 [ACPI] Lindent dr... |
412 |
|
1da177e4c Linux-2.6.12-rc2 |
413 |
EXPORT_SYMBOL(ec_write); |
616362de2 ACPI: make ec_tra... |
414 |
int ec_transaction(u8 command, |
9e1972196 ACPI: ec: fix rac... |
415 |
const u8 * wdata, unsigned wdata_len, |
1cb7b1e0d ACPI EC: remove d... |
416 |
u8 * rdata, unsigned rdata_len) |
45bea1555 [ACPI] Add "ec_po... |
417 |
{ |
8463200a0 ACPI: EC: Rename ... |
418 419 420 |
struct transaction t = {.command = command, .wdata = wdata, .rdata = rdata, .wlen = wdata_len, .rlen = rdata_len}; |
d7a76e4cb ACPI: consolidate... |
421 422 |
if (!first_ec) return -ENODEV; |
45bea1555 [ACPI] Add "ec_po... |
423 |
|
2a84cb985 ACPI: EC: Merge I... |
424 |
return acpi_ec_transaction(first_ec, &t); |
45bea1555 [ACPI] Add "ec_po... |
425 |
} |
1da177e4c Linux-2.6.12-rc2 |
426 |
|
ab9e43c64 ACPI: EC: export ... |
427 |
EXPORT_SYMBOL(ec_transaction); |
fe955682d ACPI / EC / PM: F... |
428 |
void acpi_ec_block_transactions(void) |
f6bb13aa1 ACPI / EC / PM: C... |
429 430 431 432 433 434 435 436 |
{ struct acpi_ec *ec = first_ec; if (!ec) return; mutex_lock(&ec->lock); /* Prevent transactions from being carried out */ |
fe955682d ACPI / EC / PM: F... |
437 |
set_bit(EC_FLAGS_BLOCKED, &ec->flags); |
f6bb13aa1 ACPI / EC / PM: C... |
438 439 |
mutex_unlock(&ec->lock); } |
fe955682d ACPI / EC / PM: F... |
440 |
void acpi_ec_unblock_transactions(void) |
f6bb13aa1 ACPI / EC / PM: C... |
441 442 443 444 445 446 447 448 |
{ struct acpi_ec *ec = first_ec; if (!ec) return; mutex_lock(&ec->lock); /* Allow transactions to be carried out again */ |
fe955682d ACPI / EC / PM: F... |
449 |
clear_bit(EC_FLAGS_BLOCKED, &ec->flags); |
f6bb13aa1 ACPI / EC / PM: C... |
450 451 |
mutex_unlock(&ec->lock); } |
fe955682d ACPI / EC / PM: F... |
452 |
void acpi_ec_unblock_transactions_early(void) |
d5a64513c ACPI / EC / PM: F... |
453 454 455 456 457 458 |
{ /* * Allow transactions to happen again (this function is called from * atomic context during wakeup, so we don't need to acquire the mutex). */ if (first_ec) |
fe955682d ACPI / EC / PM: F... |
459 |
clear_bit(EC_FLAGS_BLOCKED, &first_ec->flags); |
d5a64513c ACPI / EC / PM: F... |
460 |
} |
a62e8f197 ACPI: EC: Acceler... |
461 |
static int acpi_ec_query_unlocked(struct acpi_ec *ec, u8 * data) |
3576cf619 ACPI: EC: Unify p... |
462 463 |
{ int result; |
6ccedb10e ACPI: ec: Lindent... |
464 |
u8 d; |
8463200a0 ACPI: EC: Rename ... |
465 466 467 |
struct transaction t = {.command = ACPI_EC_COMMAND_QUERY, .wdata = NULL, .rdata = &d, .wlen = 0, .rlen = 1}; |
6ccedb10e ACPI: ec: Lindent... |
468 469 |
if (!ec || !data) return -EINVAL; |
6ccedb10e ACPI: ec: Lindent... |
470 471 472 473 474 |
/* * 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). */ |
a62e8f197 ACPI: EC: Acceler... |
475 |
result = acpi_ec_transaction_unlocked(ec, &t); |
6ccedb10e ACPI: ec: Lindent... |
476 477 |
if (result) return result; |
6ccedb10e ACPI: ec: Lindent... |
478 479 |
if (!d) return -ENODATA; |
6ccedb10e ACPI: ec: Lindent... |
480 481 |
*data = d; return 0; |
1da177e4c Linux-2.6.12-rc2 |
482 |
} |
1da177e4c Linux-2.6.12-rc2 |
483 484 485 |
/* -------------------------------------------------------------------------- Event Management -------------------------------------------------------------------------- */ |
837012ede ACPI EC: Add supp... |
486 487 488 489 490 491 492 493 494 495 496 497 498 499 |
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); |
30c08574d ACPI: EC: Add new... |
500 |
list_add(&handler->node, &ec->list); |
837012ede ACPI EC: Add supp... |
501 502 503 504 505 506 507 508 |
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) { |
1544fdbc8 ACPI: EC: fix use... |
509 |
struct acpi_ec_query_handler *handler, *tmp; |
837012ede ACPI EC: Add supp... |
510 |
mutex_lock(&ec->lock); |
1544fdbc8 ACPI: EC: fix use... |
511 |
list_for_each_entry_safe(handler, tmp, &ec->list, node) { |
837012ede ACPI EC: Add supp... |
512 513 514 |
if (query_bit == handler->query_bit) { list_del(&handler->node); kfree(handler); |
837012ede ACPI EC: Add supp... |
515 516 517 518 519 520 |
} } mutex_unlock(&ec->lock); } EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler); |
1da177e4c Linux-2.6.12-rc2 |
521 |
|
a62e8f197 ACPI: EC: Acceler... |
522 |
static void acpi_ec_run(void *cxt) |
1da177e4c Linux-2.6.12-rc2 |
523 |
{ |
a62e8f197 ACPI: EC: Acceler... |
524 525 |
struct acpi_ec_query_handler *handler = cxt; if (!handler) |
e41334c0a ACPI: ec: Remove ... |
526 |
return; |
a62e8f197 ACPI: EC: Acceler... |
527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 |
pr_debug(PREFIX "start query execution "); if (handler->func) handler->func(handler->data); else if (handler->handle) acpi_evaluate_object(handler->handle, NULL, NULL, NULL); pr_debug(PREFIX "stop query execution "); kfree(handler); } static int acpi_ec_sync_query(struct acpi_ec *ec) { u8 value = 0; int status; struct acpi_ec_query_handler *handler, *copy; if ((status = acpi_ec_query_unlocked(ec, &value))) return status; |
837012ede ACPI EC: Add supp... |
545 546 547 |
list_for_each_entry(handler, &ec->list, node) { if (value == handler->query_bit) { /* have custom handler for this bit */ |
a62e8f197 ACPI: EC: Acceler... |
548 549 550 551 552 553 |
copy = kmalloc(sizeof(*handler), GFP_KERNEL); if (!copy) return -ENOMEM; memcpy(copy, handler, sizeof(*copy)); pr_debug(PREFIX "push query execution (0x%2x) on queue ", value); |
f5347867c ACPI: SBS: Move S... |
554 555 |
return acpi_os_execute((copy->func) ? OSL_NOTIFY_HANDLER : OSL_GPE_HANDLER, |
a62e8f197 ACPI: EC: Acceler... |
556 |
acpi_ec_run, copy); |
837012ede ACPI EC: Add supp... |
557 558 |
} } |
a62e8f197 ACPI: EC: Acceler... |
559 560 561 562 563 564 565 566 567 568 |
return 0; } static void acpi_ec_gpe_query(void *ec_cxt) { struct acpi_ec *ec = ec_cxt; if (!ec) return; mutex_lock(&ec->lock); acpi_ec_sync_query(ec); |
837012ede ACPI EC: Add supp... |
569 |
mutex_unlock(&ec->lock); |
45bea1555 [ACPI] Add "ec_po... |
570 |
} |
1da177e4c Linux-2.6.12-rc2 |
571 |
|
a62e8f197 ACPI: EC: Acceler... |
572 573 574 575 576 577 578 579 580 581 582 583 |
static int ec_check_sci(struct acpi_ec *ec, u8 state) { if (state & ACPI_EC_FLAG_SCI) { if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) { pr_debug(PREFIX "push gpe query to the queue "); return acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ec_gpe_query, ec); } } return 0; } |
8b6cd8ad1 ACPICA: New GPE h... |
584 585 |
static u32 acpi_ec_gpe_handler(acpi_handle gpe_device, u32 gpe_number, void *data) |
1da177e4c Linux-2.6.12-rc2 |
586 |
{ |
3d02b90be ACPI: EC: Remove ... |
587 |
struct acpi_ec *ec = data; |
00eb43a18 acpi,msi-laptop: ... |
588 |
|
3ebe08a74 ACPI: EC: use pri... |
589 590 |
pr_debug(PREFIX "~~~> interrupt "); |
7c6db4e05 ACPI: EC: do tran... |
591 |
|
a62e8f197 ACPI: EC: Acceler... |
592 593 594 |
advance_transaction(ec, acpi_ec_read_status(ec)); if (ec_transaction_done(ec) && (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) == 0) { |
2a84cb985 ACPI: EC: Merge I... |
595 |
wake_up(&ec->wait); |
a62e8f197 ACPI: EC: Acceler... |
596 597 |
ec_check_sci(ec, acpi_ec_read_status(ec)); } |
bba63a296 ACPICA: Implicit ... |
598 |
return ACPI_INTERRUPT_HANDLED | ACPI_REENABLE_GPE; |
845625cdc ACPI: EC: Add pol... |
599 |
} |
1da177e4c Linux-2.6.12-rc2 |
600 601 602 603 604 |
/* -------------------------------------------------------------------------- Address Space Management -------------------------------------------------------------------------- */ static acpi_status |
5b7734b44 ACPI EC: Re-facto... |
605 |
acpi_ec_space_handler(u32 function, acpi_physical_address address, |
dadf28a10 ACPI: EC: Allow m... |
606 |
u32 bits, u64 *value64, |
50526df60 [ACPI] Lindent dr... |
607 |
void *handler_context, void *region_context) |
1da177e4c Linux-2.6.12-rc2 |
608 |
{ |
3d02b90be ACPI: EC: Remove ... |
609 |
struct acpi_ec *ec = handler_context; |
dadf28a10 ACPI: EC: Allow m... |
610 611 |
int result = 0, i, bytes = bits / 8; u8 *value = (u8 *)value64; |
1da177e4c Linux-2.6.12-rc2 |
612 |
|
1da177e4c Linux-2.6.12-rc2 |
613 |
if ((address > 0xFF) || !value || !handler_context) |
d550d98d3 ACPI: delete trac... |
614 |
return AE_BAD_PARAMETER; |
1da177e4c Linux-2.6.12-rc2 |
615 |
|
5b7734b44 ACPI EC: Re-facto... |
616 |
if (function != ACPI_READ && function != ACPI_WRITE) |
d550d98d3 ACPI: delete trac... |
617 |
return AE_BAD_PARAMETER; |
1da177e4c Linux-2.6.12-rc2 |
618 |
|
dadf28a10 ACPI: EC: Allow m... |
619 |
if (EC_FLAGS_MSI || bits > 8) |
6a63b06f3 ACPI: EC: use BUR... |
620 |
acpi_ec_burst_enable(ec); |
b3b233c7d ACPI: EC: Some ha... |
621 |
|
dadf28a10 ACPI: EC: Allow m... |
622 623 624 625 |
for (i = 0; i < bytes; ++i, ++address, ++value) result = (function == ACPI_READ) ? acpi_ec_read(ec, address, value) : acpi_ec_write(ec, address, *value); |
1da177e4c Linux-2.6.12-rc2 |
626 |
|
dadf28a10 ACPI: EC: Allow m... |
627 |
if (EC_FLAGS_MSI || bits > 8) |
6a63b06f3 ACPI: EC: use BUR... |
628 |
acpi_ec_burst_disable(ec); |
b3b233c7d ACPI: EC: Some ha... |
629 |
|
1da177e4c Linux-2.6.12-rc2 |
630 631 |
switch (result) { case -EINVAL: |
d550d98d3 ACPI: delete trac... |
632 |
return AE_BAD_PARAMETER; |
1da177e4c Linux-2.6.12-rc2 |
633 634 |
break; case -ENODEV: |
d550d98d3 ACPI: delete trac... |
635 |
return AE_NOT_FOUND; |
1da177e4c Linux-2.6.12-rc2 |
636 637 |
break; case -ETIME: |
d550d98d3 ACPI: delete trac... |
638 |
return AE_TIME; |
1da177e4c Linux-2.6.12-rc2 |
639 640 |
break; default: |
d550d98d3 ACPI: delete trac... |
641 |
return AE_OK; |
1da177e4c Linux-2.6.12-rc2 |
642 |
} |
1da177e4c Linux-2.6.12-rc2 |
643 |
} |
1da177e4c Linux-2.6.12-rc2 |
644 |
/* -------------------------------------------------------------------------- |
1da177e4c Linux-2.6.12-rc2 |
645 646 |
Driver Interface -------------------------------------------------------------------------- */ |
c0900c351 ACPI: EC: Clean E... |
647 648 |
static acpi_status ec_parse_io_ports(struct acpi_resource *resource, void *context); |
c0900c351 ACPI: EC: Clean E... |
649 650 651 652 653 |
static struct acpi_ec *make_acpi_ec(void) { struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); if (!ec) return NULL; |
080e412cc ACPI: EC: Replace... |
654 |
ec->flags = 1 << EC_FLAGS_QUERY_PENDING; |
c0900c351 ACPI: EC: Clean E... |
655 656 |
mutex_init(&ec->lock); init_waitqueue_head(&ec->wait); |
837012ede ACPI EC: Add supp... |
657 |
INIT_LIST_HEAD(&ec->list); |
8463200a0 ACPI: EC: Rename ... |
658 |
spin_lock_init(&ec->curr_lock); |
c0900c351 ACPI: EC: Clean E... |
659 660 |
return ec; } |
837012ede ACPI EC: Add supp... |
661 |
|
cd8c93a4e ACPI: EC: If ECDT... |
662 |
static acpi_status |
c019b1933 ACPI: EC: Fix "no... |
663 664 665 |
acpi_ec_register_query_methods(acpi_handle handle, u32 level, void *context, void **return_value) { |
0175d562a ACPI: ec.c: call ... |
666 667 |
char node_name[5]; struct acpi_buffer buffer = { sizeof(node_name), node_name }; |
c019b1933 ACPI: EC: Fix "no... |
668 669 |
struct acpi_ec *ec = context; int value = 0; |
0175d562a ACPI: ec.c: call ... |
670 671 672 673 674 |
acpi_status status; status = acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); if (ACPI_SUCCESS(status) && sscanf(node_name, "_Q%x", &value) == 1) { |
c019b1933 ACPI: EC: Fix "no... |
675 676 677 678 679 680 |
acpi_ec_add_query_handler(ec, value, handle, NULL, NULL); } return AE_OK; } static acpi_status |
cd8c93a4e ACPI: EC: If ECDT... |
681 |
ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval) |
837012ede ACPI EC: Add supp... |
682 |
{ |
cd8c93a4e ACPI: EC: If ECDT... |
683 |
acpi_status status; |
d21cf3c16 ACPI EC: Fix regr... |
684 |
unsigned long long tmp = 0; |
cd8c93a4e ACPI: EC: If ECDT... |
685 686 |
struct acpi_ec *ec = context; |
a5032bfdd ACPI: EC: Always ... |
687 688 689 |
/* clear addr values, ec_parse_io_ports depend on it */ ec->command_addr = ec->data_addr = 0; |
cd8c93a4e ACPI: EC: If ECDT... |
690 691 692 693 |
status = acpi_walk_resources(handle, METHOD_NAME__CRS, ec_parse_io_ports, ec); if (ACPI_FAILURE(status)) return status; |
837012ede ACPI EC: Add supp... |
694 695 696 |
/* Get GPE bit assignment (EC events). */ /* TODO: Add support for _GPE returning a package */ |
27663c585 ACPI: Change acpi... |
697 |
status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); |
cd8c93a4e ACPI: EC: If ECDT... |
698 699 |
if (ACPI_FAILURE(status)) return status; |
27663c585 ACPI: Change acpi... |
700 |
ec->gpe = tmp; |
837012ede ACPI EC: Add supp... |
701 |
/* Use the global lock for all EC transactions? */ |
d21cf3c16 ACPI EC: Fix regr... |
702 |
tmp = 0; |
27663c585 ACPI: Change acpi... |
703 704 |
acpi_evaluate_integer(handle, "_GLK", NULL, &tmp); ec->global_lock = tmp; |
837012ede ACPI EC: Add supp... |
705 |
ec->handle = handle; |
cd8c93a4e ACPI: EC: If ECDT... |
706 |
return AE_CTRL_TERMINATE; |
837012ede ACPI EC: Add supp... |
707 |
} |
5efc54761 ACPI: EC: move ac... |
708 709 710 711 712 713 714 715 716 717 |
static int ec_install_handlers(struct acpi_ec *ec) { acpi_status status; if (test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags)) return 0; status = acpi_install_gpe_handler(NULL, ec->gpe, ACPI_GPE_EDGE_TRIGGERED, &acpi_ec_gpe_handler, ec); if (ACPI_FAILURE(status)) return -ENODEV; |
9630bdd9b ACPI: Use GPE ref... |
718 |
|
a44061aa8 ACPICA: Remove wa... |
719 |
acpi_enable_gpe(NULL, ec->gpe); |
5efc54761 ACPI: EC: move ac... |
720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 |
status = acpi_install_address_space_handler(ec->handle, ACPI_ADR_SPACE_EC, &acpi_ec_space_handler, NULL, ec); if (ACPI_FAILURE(status)) { if (status == AE_NOT_FOUND) { /* * Maybe OS fails in evaluating the _REG object. * The AE_NOT_FOUND error will be ignored and OS * continue to initialize EC. */ printk(KERN_ERR "Fail in evaluating the _REG object" " of EC device. Broken bios is suspected. "); } else { acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler); |
a44061aa8 ACPICA: Remove wa... |
737 |
acpi_disable_gpe(NULL, ec->gpe); |
5efc54761 ACPI: EC: move ac... |
738 739 740 741 742 743 744 |
return -ENODEV; } } set_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags); return 0; } |
4c6110606 ACPI: EC: Drop EC... |
745 746 |
static void ec_remove_handlers(struct acpi_ec *ec) { |
a44061aa8 ACPICA: Remove wa... |
747 |
acpi_disable_gpe(NULL, ec->gpe); |
4c6110606 ACPI: EC: Drop EC... |
748 749 |
if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle, ACPI_ADR_SPACE_EC, &acpi_ec_space_handler))) |
3ebe08a74 ACPI: EC: use pri... |
750 751 |
pr_err(PREFIX "failed to remove space handler "); |
4c6110606 ACPI: EC: Drop EC... |
752 753 |
if (ACPI_FAILURE(acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler))) |
3ebe08a74 ACPI: EC: use pri... |
754 755 |
pr_err(PREFIX "failed to remove gpe handler "); |
7c6db4e05 ACPI: EC: do tran... |
756 |
clear_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags); |
4c6110606 ACPI: EC: Drop EC... |
757 |
} |
703959d47 ACPI: EC: Remove ... |
758 |
static int acpi_ec_add(struct acpi_device *device) |
1da177e4c Linux-2.6.12-rc2 |
759 |
{ |
703959d47 ACPI: EC: Remove ... |
760 |
struct acpi_ec *ec = NULL; |
d02be0470 ACPI: EC: remove ... |
761 |
int ret; |
45bea1555 [ACPI] Add "ec_po... |
762 |
|
c0900c351 ACPI: EC: Clean E... |
763 764 |
strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_EC_CLASS); |
4c6110606 ACPI: EC: Drop EC... |
765 |
/* Check for boot EC */ |
ce52ddf58 ACPI: EC: Don't d... |
766 767 768 769 770 771 772 773 774 |
if (boot_ec && (boot_ec->handle == device->handle || boot_ec->handle == ACPI_ROOT_OBJECT)) { ec = boot_ec; boot_ec = NULL; } else { ec = make_acpi_ec(); if (!ec) return -ENOMEM; |
a5032bfdd ACPI: EC: Always ... |
775 776 777 |
} if (ec_parse_device(device->handle, 0, ec, NULL) != AE_CTRL_TERMINATE) { |
ce52ddf58 ACPI: EC: Don't d... |
778 779 |
kfree(ec); return -EINVAL; |
4c6110606 ACPI: EC: Drop EC... |
780 |
} |
ce52ddf58 ACPI: EC: Don't d... |
781 782 |
/* Find and register all query methods */ acpi_walk_namespace(ACPI_TYPE_METHOD, ec->handle, 1, |
2263576cf ACPICA: Add post-... |
783 |
acpi_ec_register_query_methods, NULL, ec, NULL); |
ce52ddf58 ACPI: EC: Don't d... |
784 |
|
4c6110606 ACPI: EC: Drop EC... |
785 786 |
if (!first_ec) first_ec = ec; |
db89b4f0d ACPI: catch calls... |
787 |
device->driver_data = ec; |
de4f10466 acpi ec: Fix poss... |
788 789 790 791 792 |
WARN(!request_region(ec->data_addr, 1, "EC data"), "Could not request EC data io port 0x%lx", ec->data_addr); WARN(!request_region(ec->command_addr, 1, "EC cmd"), "Could not request EC cmd io port 0x%lx", ec->command_addr); |
3ebe08a74 ACPI: EC: use pri... |
793 794 |
pr_info(PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx ", |
4c6110606 ACPI: EC: Drop EC... |
795 |
ec->gpe, ec->command_addr, ec->data_addr); |
5efc54761 ACPI: EC: move ac... |
796 797 798 799 800 801 |
ret = ec_install_handlers(ec); /* EC is fully operational, allow queries */ clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); return ret; |
1da177e4c Linux-2.6.12-rc2 |
802 |
} |
50526df60 [ACPI] Lindent dr... |
803 |
static int acpi_ec_remove(struct acpi_device *device, int type) |
1da177e4c Linux-2.6.12-rc2 |
804 |
{ |
01f224626 ACPI: EC: Cleanup... |
805 |
struct acpi_ec *ec; |
07ddf768d ACPI: EC: acpi_ec... |
806 |
struct acpi_ec_query_handler *handler, *tmp; |
1da177e4c Linux-2.6.12-rc2 |
807 |
|
1da177e4c Linux-2.6.12-rc2 |
808 |
if (!device) |
d550d98d3 ACPI: delete trac... |
809 |
return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
810 811 |
ec = acpi_driver_data(device); |
cf745ec7a ACPI: EC: remove ... |
812 |
ec_remove_handlers(ec); |
837012ede ACPI EC: Add supp... |
813 |
mutex_lock(&ec->lock); |
07ddf768d ACPI: EC: acpi_ec... |
814 |
list_for_each_entry_safe(handler, tmp, &ec->list, node) { |
837012ede ACPI EC: Add supp... |
815 816 817 818 |
list_del(&handler->node); kfree(handler); } mutex_unlock(&ec->lock); |
de4f10466 acpi ec: Fix poss... |
819 820 |
release_region(ec->data_addr, 1); release_region(ec->command_addr, 1); |
db89b4f0d ACPI: catch calls... |
821 |
device->driver_data = NULL; |
d033879c9 ACPI: EC: first_e... |
822 |
if (ec == first_ec) |
c0900c351 ACPI: EC: Clean E... |
823 |
first_ec = NULL; |
4c6110606 ACPI: EC: Drop EC... |
824 |
kfree(ec); |
d550d98d3 ACPI: delete trac... |
825 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
826 |
} |
1da177e4c Linux-2.6.12-rc2 |
827 |
static acpi_status |
c0900c351 ACPI: EC: Clean E... |
828 |
ec_parse_io_ports(struct acpi_resource *resource, void *context) |
1da177e4c Linux-2.6.12-rc2 |
829 |
{ |
3d02b90be ACPI: EC: Remove ... |
830 |
struct acpi_ec *ec = context; |
1da177e4c Linux-2.6.12-rc2 |
831 |
|
01f224626 ACPI: EC: Cleanup... |
832 |
if (resource->type != ACPI_RESOURCE_TYPE_IO) |
1da177e4c Linux-2.6.12-rc2 |
833 |
return AE_OK; |
1da177e4c Linux-2.6.12-rc2 |
834 835 836 837 838 839 |
/* * The first address region returned is the data port, and * the second address region returned is the status/command * port. */ |
de4f10466 acpi ec: Fix poss... |
840 |
if (ec->data_addr == 0) |
6ffb221a8 ACPI: EC: Simplif... |
841 |
ec->data_addr = resource->data.io.minimum; |
de4f10466 acpi ec: Fix poss... |
842 |
else if (ec->command_addr == 0) |
6ffb221a8 ACPI: EC: Simplif... |
843 |
ec->command_addr = resource->data.io.minimum; |
01f224626 ACPI: EC: Cleanup... |
844 |
else |
1da177e4c Linux-2.6.12-rc2 |
845 |
return AE_CTRL_TERMINATE; |
1da177e4c Linux-2.6.12-rc2 |
846 |
|
1da177e4c Linux-2.6.12-rc2 |
847 848 |
return AE_OK; } |
c04209a79 ACPI: EC: Enable ... |
849 850 |
int __init acpi_boot_ec_enable(void) { |
7c6db4e05 ACPI: EC: do tran... |
851 |
if (!boot_ec || test_bit(EC_FLAGS_HANDLERS_INSTALLED, &boot_ec->flags)) |
c04209a79 ACPI: EC: Enable ... |
852 853 854 855 856 857 858 |
return 0; if (!ec_install_handlers(boot_ec)) { first_ec = boot_ec; return 0; } return -EFAULT; } |
223883b7a ACPI: EC: Switch ... |
859 860 861 862 |
static const struct acpi_device_id ec_device_ids[] = { {"PNP0C09", 0}, {"", 0}, }; |
478fa03b3 ACPI: EC: Don't p... |
863 864 865 866 867 868 |
/* Some BIOS do not survive early DSDT scan, skip it */ static int ec_skip_dsdt_scan(const struct dmi_system_id *id) { EC_FLAGS_SKIP_DSDT_SCAN = 1; return 0; } |
0adf3c746 ACPI: EC: Rewrite... |
869 870 871 872 873 874 875 876 877 878 |
/* ASUStek often supplies us with broken ECDT, validate it */ static int ec_validate_ecdt(const struct dmi_system_id *id) { EC_FLAGS_VALIDATE_ECDT = 1; return 0; } /* MSI EC needs special treatment, enable it */ static int ec_flag_msi(const struct dmi_system_id *id) { |
55b313f24 ACPI: EC: Fix MSI... |
879 880 |
printk(KERN_DEBUG PREFIX "Detected MSI hardware, enabling workarounds. "); |
0adf3c746 ACPI: EC: Rewrite... |
881 882 883 884 885 886 887 |
EC_FLAGS_MSI = 1; EC_FLAGS_VALIDATE_ECDT = 1; return 0; } static struct dmi_system_id __initdata ec_dmi_table[] = { { |
478fa03b3 ACPI: EC: Don't p... |
888 889 890 891 |
ec_skip_dsdt_scan, "Compal JFL92", { DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), DMI_MATCH(DMI_BOARD_NAME, "JFL92") }, NULL}, { |
0adf3c746 ACPI: EC: Rewrite... |
892 |
ec_flag_msi, "MSI hardware", { |
55b313f24 ACPI: EC: Fix MSI... |
893 894 895 896 897 898 899 |
DMI_MATCH(DMI_BIOS_VENDOR, "Micro-Star")}, NULL}, { ec_flag_msi, "MSI hardware", { DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star")}, NULL}, { ec_flag_msi, "MSI hardware", { DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-Star")}, NULL}, |
0adf3c746 ACPI: EC: Rewrite... |
900 |
{ |
a5dc4f898 ACPI: EC: Add ano... |
901 902 903 |
ec_flag_msi, "MSI hardware", { DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-STAR")}, NULL}, { |
534bc4e3d ACPI EC: enable M... |
904 905 906 907 908 909 910 911 |
ec_flag_msi, "Quanta hardware", { DMI_MATCH(DMI_SYS_VENDOR, "Quanta"), DMI_MATCH(DMI_PRODUCT_NAME, "TW8/SW8/DW8"),}, NULL}, { ec_flag_msi, "Quanta hardware", { DMI_MATCH(DMI_SYS_VENDOR, "Quanta"), DMI_MATCH(DMI_PRODUCT_NAME, "TW9/SW9"),}, NULL}, { |
0adf3c746 ACPI: EC: Rewrite... |
912 913 |
ec_validate_ecdt, "ASUS hardware", { DMI_MATCH(DMI_BIOS_VENDOR, "ASUS") }, NULL}, |
af986d101 ACPI: EC: add ano... |
914 915 916 |
{ ec_validate_ecdt, "ASUS hardware", { DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc.") }, NULL}, |
0adf3c746 ACPI: EC: Rewrite... |
917 918 |
{}, }; |
c0900c351 ACPI: EC: Clean E... |
919 920 |
int __init acpi_ec_ecdt_probe(void) { |
c0900c351 ACPI: EC: Clean E... |
921 |
acpi_status status; |
c6cb0e878 ACPI: EC: Don't t... |
922 |
struct acpi_ec *saved_ec = NULL; |
50526df60 [ACPI] Lindent dr... |
923 |
struct acpi_table_ecdt *ecdt_ptr; |
45bea1555 [ACPI] Add "ec_po... |
924 |
|
d66d969df ACPI: EC: Rename ... |
925 926 |
boot_ec = make_acpi_ec(); if (!boot_ec) |
c0900c351 ACPI: EC: Clean E... |
927 928 929 930 |
return -ENOMEM; /* * Generate a boot ec context */ |
0adf3c746 ACPI: EC: Rewrite... |
931 |
dmi_check_system(ec_dmi_table); |
15a58ed12 ACPICA: Remove du... |
932 933 |
status = acpi_get_table(ACPI_SIG_ECDT, 1, (struct acpi_table_header **)&ecdt_ptr); |
cd8c93a4e ACPI: EC: If ECDT... |
934 |
if (ACPI_SUCCESS(status)) { |
3ebe08a74 ACPI: EC: use pri... |
935 936 |
pr_info(PREFIX "EC description table is found, configuring boot EC "); |
cd8c93a4e ACPI: EC: If ECDT... |
937 938 939 |
boot_ec->command_addr = ecdt_ptr->control.address; boot_ec->data_addr = ecdt_ptr->data.address; boot_ec->gpe = ecdt_ptr->gpe; |
4af8e10a6 Revert "ACPI: EC:... |
940 |
boot_ec->handle = ACPI_ROOT_OBJECT; |
ce52ddf58 ACPI: EC: Don't d... |
941 |
acpi_get_handle(ACPI_ROOT_OBJECT, ecdt_ptr->id, &boot_ec->handle); |
c6cb0e878 ACPI: EC: Don't t... |
942 |
/* Don't trust ECDT, which comes from ASUSTek */ |
0adf3c746 ACPI: EC: Rewrite... |
943 |
if (!EC_FLAGS_VALIDATE_ECDT) |
c5279dee2 ACPI: EC: Add som... |
944 |
goto install; |
d6bd535d8 ACPI: EC: Use kme... |
945 |
saved_ec = kmemdup(boot_ec, sizeof(struct acpi_ec), GFP_KERNEL); |
c6cb0e878 ACPI: EC: Don't t... |
946 947 |
if (!saved_ec) return -ENOMEM; |
c5279dee2 ACPI: EC: Add som... |
948 |
/* fall through */ |
cd8c93a4e ACPI: EC: If ECDT... |
949 |
} |
0adf3c746 ACPI: EC: Rewrite... |
950 |
|
478fa03b3 ACPI: EC: Don't p... |
951 952 |
if (EC_FLAGS_SKIP_DSDT_SCAN) return -ENODEV; |
c5279dee2 ACPI: EC: Add som... |
953 954 |
/* This workaround is needed only on some broken machines, * which require early EC, but fail to provide ECDT */ |
c5279dee2 ACPI: EC: Add som... |
955 956 957 958 959 960 961 |
printk(KERN_DEBUG PREFIX "Look up EC in DSDT "); status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device, boot_ec, NULL); /* Check that acpi_get_devices actually find something */ if (ACPI_FAILURE(status) || !boot_ec->handle) goto error; |
c6cb0e878 ACPI: EC: Don't t... |
962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 |
if (saved_ec) { /* try to find good ECDT from ASUSTek */ if (saved_ec->command_addr != boot_ec->command_addr || saved_ec->data_addr != boot_ec->data_addr || saved_ec->gpe != boot_ec->gpe || saved_ec->handle != boot_ec->handle) pr_info(PREFIX "ASUSTek keeps feeding us with broken " "ECDT tables, which are very hard to workaround. " "Trying to use DSDT EC info instead. Please send " "output of acpidump to linux-acpi@vger.kernel.org "); kfree(saved_ec); saved_ec = NULL; } else { /* We really need to limit this workaround, the only ASUS, * which needs it, has fake EC._INI method, so use it as flag. * Keep boot_ec struct as it will be needed soon. */ acpi_handle dummy; if (!dmi_name_in_vendors("ASUS") || ACPI_FAILURE(acpi_get_handle(boot_ec->handle, "_INI", &dummy))) return -ENODEV; } |
c5279dee2 ACPI: EC: Add som... |
986 987 |
install: if (!ec_install_handlers(boot_ec)) { |
d033879c9 ACPI: EC: first_e... |
988 |
first_ec = boot_ec; |
e82843210 ACPI: EC: Put ins... |
989 |
return 0; |
d033879c9 ACPI: EC: first_e... |
990 |
} |
c5279dee2 ACPI: EC: Add som... |
991 |
error: |
d66d969df ACPI: EC: Rename ... |
992 993 |
kfree(boot_ec); boot_ec = NULL; |
1da177e4c Linux-2.6.12-rc2 |
994 995 |
return -ENODEV; } |
223883b7a ACPI: EC: Switch ... |
996 997 998 999 1000 1001 1002 |
static struct acpi_driver acpi_ec_driver = { .name = "ec", .class = ACPI_EC_CLASS, .ids = ec_device_ids, .ops = { .add = acpi_ec_add, .remove = acpi_ec_remove, |
223883b7a ACPI: EC: Switch ... |
1003 1004 |
}, }; |
a5f820feb ACPI: call acpi_e... |
1005 |
int __init acpi_ec_init(void) |
1da177e4c Linux-2.6.12-rc2 |
1006 |
{ |
50526df60 [ACPI] Lindent dr... |
1007 |
int result = 0; |
1da177e4c Linux-2.6.12-rc2 |
1008 |
|
1da177e4c Linux-2.6.12-rc2 |
1009 1010 |
/* Now register the driver for the EC */ result = acpi_bus_register_driver(&acpi_ec_driver); |
49c6c5ff9 ACPI: Remove /pro... |
1011 |
if (result < 0) |
d550d98d3 ACPI: delete trac... |
1012 |
return -ENODEV; |
1da177e4c Linux-2.6.12-rc2 |
1013 |
|
d550d98d3 ACPI: delete trac... |
1014 |
return result; |
1da177e4c Linux-2.6.12-rc2 |
1015 |
} |
1da177e4c Linux-2.6.12-rc2 |
1016 1017 |
/* EC driver currently not unloadable */ #if 0 |
50526df60 [ACPI] Lindent dr... |
1018 |
static void __exit acpi_ec_exit(void) |
1da177e4c Linux-2.6.12-rc2 |
1019 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1020 1021 |
acpi_bus_unregister_driver(&acpi_ec_driver); |
d550d98d3 ACPI: delete trac... |
1022 |
return; |
1da177e4c Linux-2.6.12-rc2 |
1023 |
} |
7843932ac ACPI: EC: auto se... |
1024 |
#endif /* 0 */ |