Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 2 | * ec.c - ACPI Embedded Controller Driver (v2.1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 4 | * Copyright (C) 2006-2008 Alexey Starikovskiy <astarikovskiy@suse.de> |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 5 | * Copyright (C) 2006 Denis Sadykov <denis.m.sadykov@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> |
| 7 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 8 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 9 | * |
| 10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or (at |
| 15 | * your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, but |
| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | * General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License along |
| 23 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 24 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 25 | * |
| 26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 27 | */ |
| 28 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 29 | /* Uncomment next line to get verbose printout */ |
Márton Németh | d772b3b | 2008-01-23 22:34:09 -0500 | [diff] [blame] | 30 | /* #define DEBUG */ |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/kernel.h> |
| 33 | #include <linux/module.h> |
| 34 | #include <linux/init.h> |
| 35 | #include <linux/types.h> |
| 36 | #include <linux/delay.h> |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 37 | #include <linux/interrupt.h> |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 38 | #include <linux/list.h> |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 39 | #include <linux/spinlock.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 40 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <asm/io.h> |
| 42 | #include <acpi/acpi_bus.h> |
| 43 | #include <acpi/acpi_drivers.h> |
Len Brown | eb27cae | 2009-07-06 23:40:19 -0400 | [diff] [blame] | 44 | #include <linux/dmi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Thomas Renninger | 1195a09 | 2010-07-16 13:11:31 +0200 | [diff] [blame] | 46 | #include "internal.h" |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #define ACPI_EC_CLASS "embedded_controller" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #define ACPI_EC_DEVICE_NAME "Embedded Controller" |
| 50 | #define ACPI_EC_FILE_INFO "info" |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 51 | |
Thomas Renninger | 1195a09 | 2010-07-16 13:11:31 +0200 | [diff] [blame] | 52 | #undef PREFIX |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 53 | #define PREFIX "ACPI: EC: " |
Alexey Starikovskiy | 4350933 | 2007-05-29 16:42:57 +0400 | [diff] [blame] | 54 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 55 | /* EC status register */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */ |
| 57 | #define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */ |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 58 | #define ACPI_EC_FLAG_BURST 0x10 /* burst mode */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */ |
Alexey Starikovskiy | 4350933 | 2007-05-29 16:42:57 +0400 | [diff] [blame] | 60 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 61 | /* EC commands */ |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 62 | enum ec_command { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 63 | ACPI_EC_COMMAND_READ = 0x80, |
| 64 | ACPI_EC_COMMAND_WRITE = 0x81, |
| 65 | ACPI_EC_BURST_ENABLE = 0x82, |
| 66 | ACPI_EC_BURST_DISABLE = 0x83, |
| 67 | ACPI_EC_COMMAND_QUERY = 0x84, |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 68 | }; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 69 | |
Alexey Starikovskiy | 5c40641 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 70 | #define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 71 | #define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 72 | #define ACPI_EC_MSI_UDELAY 550 /* Wait 550us for MSI EC */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 73 | |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 74 | enum { |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 75 | EC_FLAGS_QUERY_PENDING, /* Query is pending */ |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 76 | EC_FLAGS_GPE_STORM, /* GPE storm detected */ |
Rafael J. Wysocki | f6bb13a | 2010-03-04 01:52:58 +0100 | [diff] [blame] | 77 | EC_FLAGS_HANDLERS_INSTALLED, /* Handlers for GPE and |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 78 | * OpReg are installed */ |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 79 | EC_FLAGS_BLOCKED, /* Transactions are blocked */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | }; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 81 | |
Thomas Renninger | 7a18e96 | 2010-10-21 18:24:57 +0200 | [diff] [blame] | 82 | /* ec.c is compiled in acpi namespace so this shows up as acpi.ec_delay param */ |
| 83 | static unsigned int ec_delay __read_mostly = ACPI_EC_DELAY; |
| 84 | module_param(ec_delay, uint, 0644); |
| 85 | MODULE_PARM_DESC(ec_delay, "Timeout(ms) waited until an EC command completes"); |
| 86 | |
Feng Tang | a520d52 | 2012-09-28 15:22:00 +0800 | [diff] [blame] | 87 | /* |
| 88 | * If the number of false interrupts per one transaction exceeds |
| 89 | * this threshold, will think there is a GPE storm happened and |
| 90 | * will disable the GPE for normal transaction. |
| 91 | */ |
| 92 | static unsigned int ec_storm_threshold __read_mostly = 8; |
| 93 | module_param(ec_storm_threshold, uint, 0644); |
| 94 | MODULE_PARM_DESC(ec_storm_threshold, "Maxim false GPE numbers not considered as GPE storm"); |
| 95 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 96 | /* If we find an EC via the ECDT, we need to keep a ptr to its context */ |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 97 | /* External interfaces use first EC only, so remember */ |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 98 | typedef int (*acpi_ec_query_func) (void *data); |
| 99 | |
| 100 | struct acpi_ec_query_handler { |
| 101 | struct list_head node; |
| 102 | acpi_ec_query_func func; |
| 103 | acpi_handle handle; |
| 104 | void *data; |
| 105 | u8 query_bit; |
| 106 | }; |
| 107 | |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 108 | struct transaction { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 109 | const u8 *wdata; |
| 110 | u8 *rdata; |
| 111 | unsigned short irq_count; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 112 | u8 command; |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 113 | u8 wi; |
| 114 | u8 ri; |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 115 | u8 wlen; |
| 116 | u8 rlen; |
Alexey Starikovskiy | dd15f8c | 2008-11-08 21:42:30 +0300 | [diff] [blame] | 117 | bool done; |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 118 | }; |
| 119 | |
Thomas Renninger | 1195a09 | 2010-07-16 13:11:31 +0200 | [diff] [blame] | 120 | struct acpi_ec *boot_ec, *first_ec; |
| 121 | EXPORT_SYMBOL(first_ec); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 122 | |
Alexey Starikovskiy | 5423a0c | 2009-02-21 12:18:13 -0500 | [diff] [blame] | 123 | static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */ |
Alexey Starikovskiy | 0adf3c7 | 2009-10-02 20:21:33 +0400 | [diff] [blame] | 124 | static int EC_FLAGS_VALIDATE_ECDT; /* ASUStec ECDTs need to be validated */ |
Alexey Starikovskiy | 478fa03 | 2009-10-02 20:21:40 +0400 | [diff] [blame] | 125 | static int EC_FLAGS_SKIP_DSDT_SCAN; /* Not all BIOS survive early DSDT scan */ |
Alexey Starikovskiy | 5423a0c | 2009-02-21 12:18:13 -0500 | [diff] [blame] | 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | /* -------------------------------------------------------------------------- |
| 128 | Transaction Management |
| 129 | -------------------------------------------------------------------------- */ |
| 130 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 131 | static inline u8 acpi_ec_read_status(struct acpi_ec *ec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | { |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 133 | u8 x = inb(ec->command_addr); |
Márton Németh | 86dae01 | 2008-01-23 22:33:06 -0500 | [diff] [blame] | 134 | pr_debug(PREFIX "---> status = 0x%2.2x\n", x); |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 135 | return x; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | } |
| 137 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 138 | static inline u8 acpi_ec_read_data(struct acpi_ec *ec) |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 139 | { |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 140 | u8 x = inb(ec->data_addr); |
Márton Németh | 86dae01 | 2008-01-23 22:33:06 -0500 | [diff] [blame] | 141 | pr_debug(PREFIX "---> data = 0x%2.2x\n", x); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 142 | return x; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 143 | } |
| 144 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 145 | static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command) |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 146 | { |
Márton Németh | 86dae01 | 2008-01-23 22:33:06 -0500 | [diff] [blame] | 147 | pr_debug(PREFIX "<--- command = 0x%2.2x\n", command); |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 148 | outb(command, ec->command_addr); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 149 | } |
| 150 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 151 | static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data) |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 152 | { |
Márton Németh | 86dae01 | 2008-01-23 22:33:06 -0500 | [diff] [blame] | 153 | pr_debug(PREFIX "<--- data = 0x%2.2x\n", data); |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 154 | outb(data, ec->data_addr); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 155 | } |
| 156 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 157 | static int ec_transaction_done(struct acpi_ec *ec) |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 158 | { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 159 | unsigned long flags; |
| 160 | int ret = 0; |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 161 | spin_lock_irqsave(&ec->lock, flags); |
Alexey Starikovskiy | dd15f8c | 2008-11-08 21:42:30 +0300 | [diff] [blame] | 162 | if (!ec->curr || ec->curr->done) |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 163 | ret = 1; |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 164 | spin_unlock_irqrestore(&ec->lock, flags); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 165 | return ret; |
| 166 | } |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 167 | |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 168 | static void start_transaction(struct acpi_ec *ec) |
| 169 | { |
| 170 | ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0; |
| 171 | ec->curr->done = false; |
| 172 | acpi_ec_write_cmd(ec, ec->curr->command); |
| 173 | } |
| 174 | |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 175 | static void advance_transaction(struct acpi_ec *ec, u8 status) |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 176 | { |
| 177 | unsigned long flags; |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 178 | struct transaction *t = ec->curr; |
| 179 | |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 180 | spin_lock_irqsave(&ec->lock, flags); |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 181 | if (!t) |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 182 | goto unlock; |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 183 | if (t->wlen > t->wi) { |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 184 | if ((status & ACPI_EC_FLAG_IBF) == 0) |
| 185 | acpi_ec_write_data(ec, |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 186 | t->wdata[t->wi++]); |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 187 | else |
Alexey Starikovskiy | dd15f8c | 2008-11-08 21:42:30 +0300 | [diff] [blame] | 188 | goto err; |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 189 | } else if (t->rlen > t->ri) { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 190 | if ((status & ACPI_EC_FLAG_OBF) == 1) { |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 191 | t->rdata[t->ri++] = acpi_ec_read_data(ec); |
| 192 | if (t->rlen == t->ri) |
| 193 | t->done = true; |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 194 | } else |
Alexey Starikovskiy | dd15f8c | 2008-11-08 21:42:30 +0300 | [diff] [blame] | 195 | goto err; |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 196 | } else if (t->wlen == t->wi && |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 197 | (status & ACPI_EC_FLAG_IBF) == 0) |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 198 | t->done = true; |
Alexey Starikovskiy | dd15f8c | 2008-11-08 21:42:30 +0300 | [diff] [blame] | 199 | goto unlock; |
| 200 | err: |
Feng Tang | a3cd8d2 | 2012-10-23 01:30:12 +0200 | [diff] [blame] | 201 | /* |
| 202 | * If SCI bit is set, then don't think it's a false IRQ |
| 203 | * otherwise will take a not handled IRQ as a false one. |
| 204 | */ |
| 205 | if (in_interrupt() && !(status & ACPI_EC_FLAG_SCI)) |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 206 | ++t->irq_count; |
Feng Tang | a3cd8d2 | 2012-10-23 01:30:12 +0200 | [diff] [blame] | 207 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 208 | unlock: |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 209 | spin_unlock_irqrestore(&ec->lock, flags); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 210 | } |
| 211 | |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 212 | static int acpi_ec_sync_query(struct acpi_ec *ec); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 213 | |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 214 | static int ec_check_sci_sync(struct acpi_ec *ec, u8 state) |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 215 | { |
| 216 | if (state & ACPI_EC_FLAG_SCI) { |
| 217 | if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 218 | return acpi_ec_sync_query(ec); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 219 | } |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 220 | return 0; |
| 221 | } |
| 222 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 223 | static int ec_poll(struct acpi_ec *ec) |
Alexey Starikovskiy | 845625c | 2008-03-21 17:07:03 +0300 | [diff] [blame] | 224 | { |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 225 | unsigned long flags; |
Lan Tianyu | 28fe5c8 | 2013-05-06 03:23:40 +0000 | [diff] [blame] | 226 | int repeat = 5; /* number of command restarts */ |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 227 | while (repeat--) { |
| 228 | unsigned long delay = jiffies + |
Thomas Renninger | 7a18e96 | 2010-10-21 18:24:57 +0200 | [diff] [blame] | 229 | msecs_to_jiffies(ec_delay); |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 230 | do { |
| 231 | /* don't sleep with disabled interrupts */ |
| 232 | if (EC_FLAGS_MSI || irqs_disabled()) { |
| 233 | udelay(ACPI_EC_MSI_UDELAY); |
| 234 | if (ec_transaction_done(ec)) |
| 235 | return 0; |
| 236 | } else { |
| 237 | if (wait_event_timeout(ec->wait, |
| 238 | ec_transaction_done(ec), |
| 239 | msecs_to_jiffies(1))) |
| 240 | return 0; |
| 241 | } |
| 242 | advance_transaction(ec, acpi_ec_read_status(ec)); |
| 243 | } while (time_before(jiffies, delay)); |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 244 | pr_debug(PREFIX "controller reset, restart transaction\n"); |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 245 | spin_lock_irqsave(&ec->lock, flags); |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 246 | start_transaction(ec); |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 247 | spin_unlock_irqrestore(&ec->lock, flags); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 248 | } |
Alexey Starikovskiy | b77d81b | 2008-03-21 17:07:15 +0300 | [diff] [blame] | 249 | return -ETIME; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 250 | } |
| 251 | |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 252 | static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 253 | struct transaction *t) |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 254 | { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 255 | unsigned long tmp; |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 256 | int ret = 0; |
Alexey Starikovskiy | 5423a0c | 2009-02-21 12:18:13 -0500 | [diff] [blame] | 257 | if (EC_FLAGS_MSI) |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 258 | udelay(ACPI_EC_MSI_UDELAY); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 259 | /* start transaction */ |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 260 | spin_lock_irqsave(&ec->lock, tmp); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 261 | /* following two actions should be kept atomic */ |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 262 | ec->curr = t; |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 263 | start_transaction(ec); |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 264 | if (ec->curr->command == ACPI_EC_COMMAND_QUERY) |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 265 | clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 266 | spin_unlock_irqrestore(&ec->lock, tmp); |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 267 | ret = ec_poll(ec); |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 268 | spin_lock_irqsave(&ec->lock, tmp); |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 269 | ec->curr = NULL; |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 270 | spin_unlock_irqrestore(&ec->lock, tmp); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 271 | return ret; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 272 | } |
| 273 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 274 | static int ec_check_ibf0(struct acpi_ec *ec) |
| 275 | { |
| 276 | u8 status = acpi_ec_read_status(ec); |
| 277 | return (status & ACPI_EC_FLAG_IBF) == 0; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 278 | } |
| 279 | |
Alexey Starikovskiy | c0ff177 | 2008-10-16 02:02:33 +0400 | [diff] [blame] | 280 | static int ec_wait_ibf0(struct acpi_ec *ec) |
| 281 | { |
Thomas Renninger | 7a18e96 | 2010-10-21 18:24:57 +0200 | [diff] [blame] | 282 | unsigned long delay = jiffies + msecs_to_jiffies(ec_delay); |
Alexey Starikovskiy | c0ff177 | 2008-10-16 02:02:33 +0400 | [diff] [blame] | 283 | /* interrupt wait manually if GPE mode is not active */ |
Alexey Starikovskiy | c0ff177 | 2008-10-16 02:02:33 +0400 | [diff] [blame] | 284 | while (time_before(jiffies, delay)) |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 285 | if (wait_event_timeout(ec->wait, ec_check_ibf0(ec), |
| 286 | msecs_to_jiffies(1))) |
Alexey Starikovskiy | c0ff177 | 2008-10-16 02:02:33 +0400 | [diff] [blame] | 287 | return 0; |
| 288 | return -ETIME; |
| 289 | } |
| 290 | |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 291 | static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 292 | { |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 293 | int status; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 294 | u32 glk; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 295 | if (!ec || (!t) || (t->wlen && !t->wdata) || (t->rlen && !t->rdata)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 296 | return -EINVAL; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 297 | if (t->rdata) |
| 298 | memset(t->rdata, 0, t->rlen); |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 299 | mutex_lock(&ec->mutex); |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 300 | if (test_bit(EC_FLAGS_BLOCKED, &ec->flags)) { |
Rafael J. Wysocki | f6bb13a | 2010-03-04 01:52:58 +0100 | [diff] [blame] | 301 | status = -EINVAL; |
| 302 | goto unlock; |
| 303 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 304 | if (ec->global_lock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
Alexey Starikovskiy | c24e912 | 2007-02-15 23:16:18 +0300 | [diff] [blame] | 306 | if (ACPI_FAILURE(status)) { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 307 | status = -ENODEV; |
| 308 | goto unlock; |
Alexey Starikovskiy | c24e912 | 2007-02-15 23:16:18 +0300 | [diff] [blame] | 309 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | } |
Alexey Starikovskiy | c0ff177 | 2008-10-16 02:02:33 +0400 | [diff] [blame] | 311 | if (ec_wait_ibf0(ec)) { |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 312 | pr_err(PREFIX "input buffer is not empty, " |
| 313 | "aborting transaction\n"); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 314 | status = -ETIME; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 315 | goto end; |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 316 | } |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 317 | pr_debug(PREFIX "transaction start (cmd=0x%02x, addr=0x%02x)\n", |
| 318 | t->command, t->wdata ? t->wdata[0] : 0); |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 319 | /* disable GPE during transaction if storm is detected */ |
| 320 | if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { |
Rafael J. Wysocki | 3784730 | 2010-06-25 01:21:42 +0200 | [diff] [blame] | 321 | /* It has to be disabled, so that it doesn't trigger. */ |
| 322 | acpi_disable_gpe(NULL, ec->gpe); |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 323 | } |
| 324 | |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 325 | status = acpi_ec_transaction_unlocked(ec, t); |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 326 | |
| 327 | /* check if we received SCI during transaction */ |
| 328 | ec_check_sci_sync(ec, acpi_ec_read_status(ec)); |
| 329 | if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { |
Alexey Starikovskiy | 5407010 | 2009-12-30 15:53:10 +0300 | [diff] [blame] | 330 | msleep(1); |
Rafael J. Wysocki | 3784730 | 2010-06-25 01:21:42 +0200 | [diff] [blame] | 331 | /* It is safe to enable the GPE outside of the transaction. */ |
| 332 | acpi_enable_gpe(NULL, ec->gpe); |
Feng Tang | a520d52 | 2012-09-28 15:22:00 +0800 | [diff] [blame] | 333 | } else if (t->irq_count > ec_storm_threshold) { |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 334 | pr_info(PREFIX "GPE storm detected(%d GPEs), " |
| 335 | "transactions will use polling mode\n", |
| 336 | t->irq_count); |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 337 | set_bit(EC_FLAGS_GPE_STORM, &ec->flags); |
| 338 | } |
Alexey Starikovskiy | 5407010 | 2009-12-30 15:53:10 +0300 | [diff] [blame] | 339 | pr_debug(PREFIX "transaction end\n"); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 340 | end: |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 341 | if (ec->global_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | acpi_release_global_lock(glk); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 343 | unlock: |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 344 | mutex_unlock(&ec->mutex); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 345 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | } |
| 347 | |
Roel Kluin | 8a383ef | 2008-12-09 20:45:30 +0100 | [diff] [blame] | 348 | static int acpi_ec_burst_enable(struct acpi_ec *ec) |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 349 | { |
| 350 | u8 d; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 351 | struct transaction t = {.command = ACPI_EC_BURST_ENABLE, |
| 352 | .wdata = NULL, .rdata = &d, |
| 353 | .wlen = 0, .rlen = 1}; |
| 354 | |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 355 | return acpi_ec_transaction(ec, &t); |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 356 | } |
| 357 | |
Roel Kluin | 8a383ef | 2008-12-09 20:45:30 +0100 | [diff] [blame] | 358 | static int acpi_ec_burst_disable(struct acpi_ec *ec) |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 359 | { |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 360 | struct transaction t = {.command = ACPI_EC_BURST_DISABLE, |
| 361 | .wdata = NULL, .rdata = NULL, |
| 362 | .wlen = 0, .rlen = 0}; |
| 363 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 364 | return (acpi_ec_read_status(ec) & ACPI_EC_FLAG_BURST) ? |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 365 | acpi_ec_transaction(ec, &t) : 0; |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 366 | } |
| 367 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 368 | static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data) |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 369 | { |
| 370 | int result; |
| 371 | u8 d; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 372 | struct transaction t = {.command = ACPI_EC_COMMAND_READ, |
| 373 | .wdata = &address, .rdata = &d, |
| 374 | .wlen = 1, .rlen = 1}; |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 375 | |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 376 | result = acpi_ec_transaction(ec, &t); |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 377 | *data = d; |
| 378 | return result; |
| 379 | } |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 380 | |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 381 | static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data) |
| 382 | { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 383 | u8 wdata[2] = { address, data }; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 384 | struct transaction t = {.command = ACPI_EC_COMMAND_WRITE, |
| 385 | .wdata = wdata, .rdata = NULL, |
| 386 | .wlen = 2, .rlen = 0}; |
| 387 | |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 388 | return acpi_ec_transaction(ec, &t); |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 389 | } |
| 390 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | /* |
| 392 | * Externally callable EC access functions. For now, assume 1 EC only |
| 393 | */ |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 394 | int ec_burst_enable(void) |
| 395 | { |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 396 | if (!first_ec) |
| 397 | return -ENODEV; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 398 | return acpi_ec_burst_enable(first_ec); |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 399 | } |
| 400 | |
| 401 | EXPORT_SYMBOL(ec_burst_enable); |
| 402 | |
| 403 | int ec_burst_disable(void) |
| 404 | { |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 405 | if (!first_ec) |
| 406 | return -ENODEV; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 407 | return acpi_ec_burst_disable(first_ec); |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | EXPORT_SYMBOL(ec_burst_disable); |
| 411 | |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 412 | int ec_read(u8 addr, u8 *val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | int err; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 415 | u8 temp_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | |
| 417 | if (!first_ec) |
| 418 | return -ENODEV; |
| 419 | |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 420 | err = acpi_ec_read(first_ec, addr, &temp_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
| 422 | if (!err) { |
| 423 | *val = temp_data; |
| 424 | return 0; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 425 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | return err; |
| 427 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 428 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | EXPORT_SYMBOL(ec_read); |
| 430 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 431 | int ec_write(u8 addr, u8 val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | int err; |
| 434 | |
| 435 | if (!first_ec) |
| 436 | return -ENODEV; |
| 437 | |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 438 | err = acpi_ec_write(first_ec, addr, val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
| 440 | return err; |
| 441 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | EXPORT_SYMBOL(ec_write); |
| 444 | |
Randy Dunlap | 616362d | 2006-10-27 01:47:34 -0400 | [diff] [blame] | 445 | int ec_transaction(u8 command, |
Alexey Starikovskiy | 9e19721 | 2007-03-07 18:29:35 -0500 | [diff] [blame] | 446 | const u8 * wdata, unsigned wdata_len, |
Thomas Renninger | 1cb7b1e | 2011-03-31 13:36:38 +0200 | [diff] [blame] | 447 | u8 * rdata, unsigned rdata_len) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 448 | { |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 449 | struct transaction t = {.command = command, |
| 450 | .wdata = wdata, .rdata = rdata, |
| 451 | .wlen = wdata_len, .rlen = rdata_len}; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 452 | if (!first_ec) |
| 453 | return -ENODEV; |
| 454 | |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 455 | return acpi_ec_transaction(first_ec, &t); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 456 | } |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 457 | |
Lennart Poettering | ab9e43c | 2006-10-03 22:49:00 -0400 | [diff] [blame] | 458 | EXPORT_SYMBOL(ec_transaction); |
| 459 | |
Seth Forshee | 3e2abc5 | 2012-01-18 13:44:08 -0600 | [diff] [blame] | 460 | /* Get the handle to the EC device */ |
| 461 | acpi_handle ec_get_handle(void) |
| 462 | { |
| 463 | if (!first_ec) |
| 464 | return NULL; |
| 465 | return first_ec->handle; |
| 466 | } |
| 467 | |
| 468 | EXPORT_SYMBOL(ec_get_handle); |
| 469 | |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 470 | void acpi_ec_block_transactions(void) |
Rafael J. Wysocki | f6bb13a | 2010-03-04 01:52:58 +0100 | [diff] [blame] | 471 | { |
| 472 | struct acpi_ec *ec = first_ec; |
| 473 | |
| 474 | if (!ec) |
| 475 | return; |
| 476 | |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 477 | mutex_lock(&ec->mutex); |
Rafael J. Wysocki | f6bb13a | 2010-03-04 01:52:58 +0100 | [diff] [blame] | 478 | /* Prevent transactions from being carried out */ |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 479 | set_bit(EC_FLAGS_BLOCKED, &ec->flags); |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 480 | mutex_unlock(&ec->mutex); |
Rafael J. Wysocki | f6bb13a | 2010-03-04 01:52:58 +0100 | [diff] [blame] | 481 | } |
| 482 | |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 483 | void acpi_ec_unblock_transactions(void) |
Rafael J. Wysocki | f6bb13a | 2010-03-04 01:52:58 +0100 | [diff] [blame] | 484 | { |
| 485 | struct acpi_ec *ec = first_ec; |
| 486 | |
| 487 | if (!ec) |
| 488 | return; |
| 489 | |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 490 | mutex_lock(&ec->mutex); |
Rafael J. Wysocki | f6bb13a | 2010-03-04 01:52:58 +0100 | [diff] [blame] | 491 | /* Allow transactions to be carried out again */ |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 492 | clear_bit(EC_FLAGS_BLOCKED, &ec->flags); |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 493 | mutex_unlock(&ec->mutex); |
Rafael J. Wysocki | f6bb13a | 2010-03-04 01:52:58 +0100 | [diff] [blame] | 494 | } |
| 495 | |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 496 | void acpi_ec_unblock_transactions_early(void) |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 497 | { |
| 498 | /* |
| 499 | * Allow transactions to happen again (this function is called from |
| 500 | * atomic context during wakeup, so we don't need to acquire the mutex). |
| 501 | */ |
| 502 | if (first_ec) |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 503 | clear_bit(EC_FLAGS_BLOCKED, &first_ec->flags); |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 504 | } |
| 505 | |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 506 | static int acpi_ec_query_unlocked(struct acpi_ec *ec, u8 * data) |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 507 | { |
| 508 | int result; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 509 | u8 d; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 510 | struct transaction t = {.command = ACPI_EC_COMMAND_QUERY, |
| 511 | .wdata = NULL, .rdata = &d, |
| 512 | .wlen = 0, .rlen = 1}; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 513 | if (!ec || !data) |
| 514 | return -EINVAL; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 515 | /* |
| 516 | * Query the EC to find out which _Qxx method we need to evaluate. |
| 517 | * Note that successful completion of the query causes the ACPI_EC_SCI |
| 518 | * bit to be cleared (and thus clearing the interrupt source). |
| 519 | */ |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 520 | result = acpi_ec_transaction_unlocked(ec, &t); |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 521 | if (result) |
| 522 | return result; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 523 | if (!d) |
| 524 | return -ENODATA; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 525 | *data = d; |
| 526 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | } |
| 528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | /* -------------------------------------------------------------------------- |
| 530 | Event Management |
| 531 | -------------------------------------------------------------------------- */ |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 532 | int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit, |
| 533 | acpi_handle handle, acpi_ec_query_func func, |
| 534 | void *data) |
| 535 | { |
| 536 | struct acpi_ec_query_handler *handler = |
| 537 | kzalloc(sizeof(struct acpi_ec_query_handler), GFP_KERNEL); |
| 538 | if (!handler) |
| 539 | return -ENOMEM; |
| 540 | |
| 541 | handler->query_bit = query_bit; |
| 542 | handler->handle = handle; |
| 543 | handler->func = func; |
| 544 | handler->data = data; |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 545 | mutex_lock(&ec->mutex); |
Alexey Starikovskiy | 30c0857 | 2007-09-26 19:43:22 +0400 | [diff] [blame] | 546 | list_add(&handler->node, &ec->list); |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 547 | mutex_unlock(&ec->mutex); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 548 | return 0; |
| 549 | } |
| 550 | |
| 551 | EXPORT_SYMBOL_GPL(acpi_ec_add_query_handler); |
| 552 | |
| 553 | void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit) |
| 554 | { |
Adrian Bunk | 1544fdb | 2007-10-24 18:26:00 +0200 | [diff] [blame] | 555 | struct acpi_ec_query_handler *handler, *tmp; |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 556 | mutex_lock(&ec->mutex); |
Adrian Bunk | 1544fdb | 2007-10-24 18:26:00 +0200 | [diff] [blame] | 557 | list_for_each_entry_safe(handler, tmp, &ec->list, node) { |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 558 | if (query_bit == handler->query_bit) { |
| 559 | list_del(&handler->node); |
| 560 | kfree(handler); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 561 | } |
| 562 | } |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 563 | mutex_unlock(&ec->mutex); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 564 | } |
| 565 | |
| 566 | EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 568 | static void acpi_ec_run(void *cxt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | { |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 570 | struct acpi_ec_query_handler *handler = cxt; |
| 571 | if (!handler) |
Alexey Starikovskiy | e41334c | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 572 | return; |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 573 | pr_debug(PREFIX "start query execution\n"); |
| 574 | if (handler->func) |
| 575 | handler->func(handler->data); |
| 576 | else if (handler->handle) |
| 577 | acpi_evaluate_object(handler->handle, NULL, NULL, NULL); |
| 578 | pr_debug(PREFIX "stop query execution\n"); |
| 579 | kfree(handler); |
| 580 | } |
| 581 | |
| 582 | static int acpi_ec_sync_query(struct acpi_ec *ec) |
| 583 | { |
| 584 | u8 value = 0; |
| 585 | int status; |
| 586 | struct acpi_ec_query_handler *handler, *copy; |
| 587 | if ((status = acpi_ec_query_unlocked(ec, &value))) |
| 588 | return status; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 589 | list_for_each_entry(handler, &ec->list, node) { |
| 590 | if (value == handler->query_bit) { |
| 591 | /* have custom handler for this bit */ |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 592 | copy = kmalloc(sizeof(*handler), GFP_KERNEL); |
| 593 | if (!copy) |
| 594 | return -ENOMEM; |
| 595 | memcpy(copy, handler, sizeof(*copy)); |
| 596 | pr_debug(PREFIX "push query execution (0x%2x) on queue\n", value); |
Alexey Starikovskiy | f534786 | 2009-12-30 15:53:03 +0300 | [diff] [blame] | 597 | return acpi_os_execute((copy->func) ? |
| 598 | OSL_NOTIFY_HANDLER : OSL_GPE_HANDLER, |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 599 | acpi_ec_run, copy); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 600 | } |
| 601 | } |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 602 | return 0; |
| 603 | } |
| 604 | |
| 605 | static void acpi_ec_gpe_query(void *ec_cxt) |
| 606 | { |
| 607 | struct acpi_ec *ec = ec_cxt; |
| 608 | if (!ec) |
| 609 | return; |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 610 | mutex_lock(&ec->mutex); |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 611 | acpi_ec_sync_query(ec); |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 612 | mutex_unlock(&ec->mutex); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 613 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 615 | static int ec_check_sci(struct acpi_ec *ec, u8 state) |
| 616 | { |
| 617 | if (state & ACPI_EC_FLAG_SCI) { |
| 618 | if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) { |
| 619 | pr_debug(PREFIX "push gpe query to the queue\n"); |
| 620 | return acpi_os_execute(OSL_NOTIFY_HANDLER, |
| 621 | acpi_ec_gpe_query, ec); |
| 622 | } |
| 623 | } |
| 624 | return 0; |
| 625 | } |
| 626 | |
Lin Ming | 8b6cd8a | 2010-12-13 13:38:46 +0800 | [diff] [blame] | 627 | static u32 acpi_ec_gpe_handler(acpi_handle gpe_device, |
| 628 | u32 gpe_number, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | { |
Alexey Starikovskiy | 3d02b90 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 630 | struct acpi_ec *ec = data; |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 631 | u8 status = acpi_ec_read_status(ec); |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 632 | |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 633 | pr_debug(PREFIX "~~~> interrupt, status:0x%02x\n", status); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 634 | |
Feng Tang | b76b51b | 2012-10-23 01:29:38 +0200 | [diff] [blame] | 635 | advance_transaction(ec, status); |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 636 | if (ec_transaction_done(ec) && |
| 637 | (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) == 0) { |
Alexey Starikovskiy | 2a84cb9 | 2009-08-30 03:06:14 +0400 | [diff] [blame] | 638 | wake_up(&ec->wait); |
Alexey Starikovskiy | a62e8f1 | 2009-12-24 11:34:16 +0300 | [diff] [blame] | 639 | ec_check_sci(ec, acpi_ec_read_status(ec)); |
| 640 | } |
Lin Ming | bba63a2 | 2010-12-13 13:39:17 +0800 | [diff] [blame] | 641 | return ACPI_INTERRUPT_HANDLED | ACPI_REENABLE_GPE; |
Alexey Starikovskiy | 845625c | 2008-03-21 17:07:03 +0300 | [diff] [blame] | 642 | } |
| 643 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | /* -------------------------------------------------------------------------- |
| 645 | Address Space Management |
| 646 | -------------------------------------------------------------------------- */ |
| 647 | |
| 648 | static acpi_status |
Alexey Starikovskiy | 5b7734b | 2007-05-29 16:42:52 +0400 | [diff] [blame] | 649 | acpi_ec_space_handler(u32 function, acpi_physical_address address, |
Alexey Starikovskiy | dadf28a | 2010-03-17 13:14:13 -0400 | [diff] [blame] | 650 | u32 bits, u64 *value64, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 651 | void *handler_context, void *region_context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | { |
Alexey Starikovskiy | 3d02b90 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 653 | struct acpi_ec *ec = handler_context; |
Alexey Starikovskiy | dadf28a | 2010-03-17 13:14:13 -0400 | [diff] [blame] | 654 | int result = 0, i, bytes = bits / 8; |
| 655 | u8 *value = (u8 *)value64; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | if ((address > 0xFF) || !value || !handler_context) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 658 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | |
Alexey Starikovskiy | 5b7734b | 2007-05-29 16:42:52 +0400 | [diff] [blame] | 660 | if (function != ACPI_READ && function != ACPI_WRITE) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 661 | return AE_BAD_PARAMETER; |
Alexey Starikovskiy | 5b7734b | 2007-05-29 16:42:52 +0400 | [diff] [blame] | 662 | |
Alexey Starikovskiy | dadf28a | 2010-03-17 13:14:13 -0400 | [diff] [blame] | 663 | if (EC_FLAGS_MSI || bits > 8) |
Alexey Starikovskiy | 6a63b06f | 2009-08-28 23:29:44 +0400 | [diff] [blame] | 664 | acpi_ec_burst_enable(ec); |
Alexey Starikovskiy | b3b233c | 2008-01-11 02:42:57 +0300 | [diff] [blame] | 665 | |
Alexey Starikovskiy | dadf28a | 2010-03-17 13:14:13 -0400 | [diff] [blame] | 666 | for (i = 0; i < bytes; ++i, ++address, ++value) |
| 667 | result = (function == ACPI_READ) ? |
| 668 | acpi_ec_read(ec, address, value) : |
| 669 | acpi_ec_write(ec, address, *value); |
Alexey Starikovskiy | 3e71a87 | 2008-01-11 02:42:51 +0300 | [diff] [blame] | 670 | |
Alexey Starikovskiy | dadf28a | 2010-03-17 13:14:13 -0400 | [diff] [blame] | 671 | if (EC_FLAGS_MSI || bits > 8) |
Alexey Starikovskiy | 6a63b06f | 2009-08-28 23:29:44 +0400 | [diff] [blame] | 672 | acpi_ec_burst_disable(ec); |
Alexey Starikovskiy | b3b233c | 2008-01-11 02:42:57 +0300 | [diff] [blame] | 673 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | switch (result) { |
| 675 | case -EINVAL: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 676 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | break; |
| 678 | case -ENODEV: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 679 | return AE_NOT_FOUND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | break; |
| 681 | case -ETIME: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 682 | return AE_TIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | break; |
| 684 | default: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 685 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | } |
| 688 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | /* -------------------------------------------------------------------------- |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | Driver Interface |
| 691 | -------------------------------------------------------------------------- */ |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 692 | static acpi_status |
| 693 | ec_parse_io_ports(struct acpi_resource *resource, void *context); |
| 694 | |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 695 | static struct acpi_ec *make_acpi_ec(void) |
| 696 | { |
| 697 | struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
| 698 | if (!ec) |
| 699 | return NULL; |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 700 | ec->flags = 1 << EC_FLAGS_QUERY_PENDING; |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 701 | mutex_init(&ec->mutex); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 702 | init_waitqueue_head(&ec->wait); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 703 | INIT_LIST_HEAD(&ec->list); |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 704 | spin_lock_init(&ec->lock); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 705 | return ec; |
| 706 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 708 | static acpi_status |
Alexey Starikovskiy | c019b19 | 2007-08-14 01:03:42 -0400 | [diff] [blame] | 709 | acpi_ec_register_query_methods(acpi_handle handle, u32 level, |
| 710 | void *context, void **return_value) |
| 711 | { |
Lin Ming | 0175d56 | 2008-12-16 16:46:12 +0800 | [diff] [blame] | 712 | char node_name[5]; |
| 713 | struct acpi_buffer buffer = { sizeof(node_name), node_name }; |
Alexey Starikovskiy | c019b19 | 2007-08-14 01:03:42 -0400 | [diff] [blame] | 714 | struct acpi_ec *ec = context; |
| 715 | int value = 0; |
Lin Ming | 0175d56 | 2008-12-16 16:46:12 +0800 | [diff] [blame] | 716 | acpi_status status; |
| 717 | |
| 718 | status = acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); |
| 719 | |
| 720 | if (ACPI_SUCCESS(status) && sscanf(node_name, "_Q%x", &value) == 1) { |
Alexey Starikovskiy | c019b19 | 2007-08-14 01:03:42 -0400 | [diff] [blame] | 721 | acpi_ec_add_query_handler(ec, value, handle, NULL, NULL); |
| 722 | } |
| 723 | return AE_OK; |
| 724 | } |
| 725 | |
| 726 | static acpi_status |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 727 | ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval) |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 728 | { |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 729 | acpi_status status; |
Alexey Starikovskiy | d21cf3c | 2008-11-03 14:26:40 -0500 | [diff] [blame] | 730 | unsigned long long tmp = 0; |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 731 | |
| 732 | struct acpi_ec *ec = context; |
Alexey Starikovskiy | a5032bf | 2009-04-01 01:33:15 -0400 | [diff] [blame] | 733 | |
| 734 | /* clear addr values, ec_parse_io_ports depend on it */ |
| 735 | ec->command_addr = ec->data_addr = 0; |
| 736 | |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 737 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
| 738 | ec_parse_io_ports, ec); |
| 739 | if (ACPI_FAILURE(status)) |
| 740 | return status; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 741 | |
| 742 | /* Get GPE bit assignment (EC events). */ |
| 743 | /* TODO: Add support for _GPE returning a package */ |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 744 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 745 | if (ACPI_FAILURE(status)) |
| 746 | return status; |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 747 | ec->gpe = tmp; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 748 | /* Use the global lock for all EC transactions? */ |
Alexey Starikovskiy | d21cf3c | 2008-11-03 14:26:40 -0500 | [diff] [blame] | 749 | tmp = 0; |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 750 | acpi_evaluate_integer(handle, "_GLK", NULL, &tmp); |
| 751 | ec->global_lock = tmp; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 752 | ec->handle = handle; |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 753 | return AE_CTRL_TERMINATE; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 754 | } |
| 755 | |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 756 | static int ec_install_handlers(struct acpi_ec *ec) |
| 757 | { |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 758 | acpi_status status; |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 759 | if (test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags)) |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 760 | return 0; |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 761 | status = acpi_install_gpe_handler(NULL, ec->gpe, |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 762 | ACPI_GPE_EDGE_TRIGGERED, |
| 763 | &acpi_ec_gpe_handler, ec); |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 764 | if (ACPI_FAILURE(status)) |
| 765 | return -ENODEV; |
Rafael J. Wysocki | 9630bdd | 2010-02-17 23:41:07 +0100 | [diff] [blame] | 766 | |
Rafael J. Wysocki | a44061a | 2010-07-01 10:11:45 +0800 | [diff] [blame] | 767 | acpi_enable_gpe(NULL, ec->gpe); |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 768 | status = acpi_install_address_space_handler(ec->handle, |
| 769 | ACPI_ADR_SPACE_EC, |
| 770 | &acpi_ec_space_handler, |
Alexey Starikovskiy | 6d9e112 | 2008-03-24 23:22:29 +0300 | [diff] [blame] | 771 | NULL, ec); |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 772 | if (ACPI_FAILURE(status)) { |
Zhao Yakui | 20edd74 | 2008-10-17 02:02:44 -0400 | [diff] [blame] | 773 | if (status == AE_NOT_FOUND) { |
| 774 | /* |
| 775 | * Maybe OS fails in evaluating the _REG object. |
| 776 | * The AE_NOT_FOUND error will be ignored and OS |
| 777 | * continue to initialize EC. |
| 778 | */ |
| 779 | printk(KERN_ERR "Fail in evaluating the _REG object" |
| 780 | " of EC device. Broken bios is suspected.\n"); |
| 781 | } else { |
| 782 | acpi_remove_gpe_handler(NULL, ec->gpe, |
| 783 | &acpi_ec_gpe_handler); |
Rafael J. Wysocki | a44061a | 2010-07-01 10:11:45 +0800 | [diff] [blame] | 784 | acpi_disable_gpe(NULL, ec->gpe); |
Zhao Yakui | 20edd74 | 2008-10-17 02:02:44 -0400 | [diff] [blame] | 785 | return -ENODEV; |
| 786 | } |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 787 | } |
| 788 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 789 | set_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags); |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 790 | return 0; |
| 791 | } |
| 792 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | static void ec_remove_handlers(struct acpi_ec *ec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | { |
Rafael J. Wysocki | a44061a | 2010-07-01 10:11:45 +0800 | [diff] [blame] | 795 | acpi_disable_gpe(NULL, ec->gpe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle, |
| 797 | ACPI_ADR_SPACE_EC, &acpi_ec_space_handler))) |
| 798 | pr_err(PREFIX "failed to remove space handler\n"); |
| 799 | if (ACPI_FAILURE(acpi_remove_gpe_handler(NULL, ec->gpe, |
| 800 | &acpi_ec_gpe_handler))) |
| 801 | pr_err(PREFIX "failed to remove gpe handler\n"); |
| 802 | clear_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags); |
| 803 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | static int acpi_ec_add(struct acpi_device *device) |
| 806 | { |
| 807 | struct acpi_ec *ec = NULL; |
Bjorn Helgaas | d02be04 | 2009-06-22 20:41:35 +0000 | [diff] [blame] | 808 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); |
| 811 | strcpy(acpi_device_class(device), ACPI_EC_CLASS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | /* Check for boot EC */ |
| 814 | if (boot_ec && |
| 815 | (boot_ec->handle == device->handle || |
| 816 | boot_ec->handle == ACPI_ROOT_OBJECT)) { |
| 817 | ec = boot_ec; |
| 818 | boot_ec = NULL; |
| 819 | } else { |
| 820 | ec = make_acpi_ec(); |
| 821 | if (!ec) |
| 822 | return -ENOMEM; |
| 823 | } |
| 824 | if (ec_parse_device(device->handle, 0, ec, NULL) != |
| 825 | AE_CTRL_TERMINATE) { |
| 826 | kfree(ec); |
| 827 | return -EINVAL; |
| 828 | } |
| 829 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | /* Find and register all query methods */ |
| 831 | acpi_walk_namespace(ACPI_TYPE_METHOD, ec->handle, 1, |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 832 | acpi_ec_register_query_methods, NULL, ec, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | |
| 834 | if (!first_ec) |
| 835 | first_ec = ec; |
| 836 | device->driver_data = ec; |
Thomas Renninger | de4f104 | 2010-07-29 22:08:44 +0200 | [diff] [blame] | 837 | |
Andi Kleen | d6795fe3 | 2012-02-06 08:17:08 -0800 | [diff] [blame] | 838 | ret = !!request_region(ec->data_addr, 1, "EC data"); |
| 839 | WARN(!ret, "Could not request EC data io port 0x%lx", ec->data_addr); |
| 840 | ret = !!request_region(ec->command_addr, 1, "EC cmd"); |
| 841 | WARN(!ret, "Could not request EC cmd io port 0x%lx", ec->command_addr); |
Thomas Renninger | de4f104 | 2010-07-29 22:08:44 +0200 | [diff] [blame] | 842 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | pr_info(PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n", |
| 844 | ec->gpe, ec->command_addr, ec->data_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 846 | ret = ec_install_handlers(ec); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 847 | |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 848 | /* EC is fully operational, allow queries */ |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 849 | clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 850 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | } |
| 852 | |
Rafael J. Wysocki | 51fac83 | 2013-01-24 00:24:48 +0100 | [diff] [blame] | 853 | static int acpi_ec_remove(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | { |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 855 | struct acpi_ec *ec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | struct acpi_ec_query_handler *handler, *tmp; |
| 857 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 859 | return -EINVAL; |
Alexey Starikovskiy | f9319f9 | 2007-08-24 08:10:11 +0400 | [diff] [blame] | 860 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | ec = acpi_driver_data(device); |
Bjorn Helgaas | cf745ec | 2009-06-22 20:41:40 +0000 | [diff] [blame] | 862 | ec_remove_handlers(ec); |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 863 | mutex_lock(&ec->mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | list_for_each_entry_safe(handler, tmp, &ec->list, node) { |
| 865 | list_del(&handler->node); |
| 866 | kfree(handler); |
| 867 | } |
Feng Tang | f351d02 | 2012-10-23 01:29:27 +0200 | [diff] [blame] | 868 | mutex_unlock(&ec->mutex); |
Thomas Renninger | de4f104 | 2010-07-29 22:08:44 +0200 | [diff] [blame] | 869 | release_region(ec->data_addr, 1); |
| 870 | release_region(ec->command_addr, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | device->driver_data = NULL; |
| 872 | if (ec == first_ec) |
| 873 | first_ec = NULL; |
| 874 | kfree(ec); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 875 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | } |
| 877 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | static acpi_status |
| 879 | ec_parse_io_ports(struct acpi_resource *resource, void *context) |
| 880 | { |
| 881 | struct acpi_ec *ec = context; |
| 882 | |
| 883 | if (resource->type != ACPI_RESOURCE_TYPE_IO) |
| 884 | return AE_OK; |
| 885 | |
| 886 | /* |
| 887 | * The first address region returned is the data port, and |
| 888 | * the second address region returned is the status/command |
| 889 | * port. |
| 890 | */ |
Thomas Renninger | de4f104 | 2010-07-29 22:08:44 +0200 | [diff] [blame] | 891 | if (ec->data_addr == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | ec->data_addr = resource->data.io.minimum; |
Thomas Renninger | de4f104 | 2010-07-29 22:08:44 +0200 | [diff] [blame] | 893 | else if (ec->command_addr == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | ec->command_addr = resource->data.io.minimum; |
| 895 | else |
| 896 | return AE_CTRL_TERMINATE; |
| 897 | |
| 898 | return AE_OK; |
| 899 | } |
| 900 | |
Alexey Starikovskiy | c04209a | 2008-01-01 14:12:55 -0500 | [diff] [blame] | 901 | int __init acpi_boot_ec_enable(void) |
| 902 | { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 903 | if (!boot_ec || test_bit(EC_FLAGS_HANDLERS_INSTALLED, &boot_ec->flags)) |
Alexey Starikovskiy | c04209a | 2008-01-01 14:12:55 -0500 | [diff] [blame] | 904 | return 0; |
| 905 | if (!ec_install_handlers(boot_ec)) { |
| 906 | first_ec = boot_ec; |
| 907 | return 0; |
| 908 | } |
| 909 | return -EFAULT; |
| 910 | } |
| 911 | |
Alexey Starikovskiy | 223883b | 2008-03-21 17:07:21 +0300 | [diff] [blame] | 912 | static const struct acpi_device_id ec_device_ids[] = { |
| 913 | {"PNP0C09", 0}, |
| 914 | {"", 0}, |
| 915 | }; |
| 916 | |
Alexey Starikovskiy | 478fa03 | 2009-10-02 20:21:40 +0400 | [diff] [blame] | 917 | /* Some BIOS do not survive early DSDT scan, skip it */ |
| 918 | static int ec_skip_dsdt_scan(const struct dmi_system_id *id) |
| 919 | { |
| 920 | EC_FLAGS_SKIP_DSDT_SCAN = 1; |
| 921 | return 0; |
| 922 | } |
| 923 | |
Alexey Starikovskiy | 0adf3c7 | 2009-10-02 20:21:33 +0400 | [diff] [blame] | 924 | /* ASUStek often supplies us with broken ECDT, validate it */ |
| 925 | static int ec_validate_ecdt(const struct dmi_system_id *id) |
| 926 | { |
| 927 | EC_FLAGS_VALIDATE_ECDT = 1; |
| 928 | return 0; |
| 929 | } |
| 930 | |
| 931 | /* MSI EC needs special treatment, enable it */ |
| 932 | static int ec_flag_msi(const struct dmi_system_id *id) |
| 933 | { |
Alexey Starikovskiy | 55b313f | 2009-12-22 02:42:52 -0500 | [diff] [blame] | 934 | printk(KERN_DEBUG PREFIX "Detected MSI hardware, enabling workarounds.\n"); |
Alexey Starikovskiy | 0adf3c7 | 2009-10-02 20:21:33 +0400 | [diff] [blame] | 935 | EC_FLAGS_MSI = 1; |
| 936 | EC_FLAGS_VALIDATE_ECDT = 1; |
| 937 | return 0; |
| 938 | } |
| 939 | |
Feng Tang | 67bfa9b | 2012-09-28 15:22:01 +0800 | [diff] [blame] | 940 | /* |
| 941 | * Clevo M720 notebook actually works ok with IRQ mode, if we lifted |
| 942 | * the GPE storm threshold back to 20 |
| 943 | */ |
| 944 | static int ec_enlarge_storm_threshold(const struct dmi_system_id *id) |
| 945 | { |
| 946 | pr_debug("Setting the EC GPE storm threshold to 20\n"); |
| 947 | ec_storm_threshold = 20; |
| 948 | return 0; |
| 949 | } |
| 950 | |
Alexey Starikovskiy | 0adf3c7 | 2009-10-02 20:21:33 +0400 | [diff] [blame] | 951 | static struct dmi_system_id __initdata ec_dmi_table[] = { |
| 952 | { |
Alexey Starikovskiy | 478fa03 | 2009-10-02 20:21:40 +0400 | [diff] [blame] | 953 | ec_skip_dsdt_scan, "Compal JFL92", { |
| 954 | DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), |
| 955 | DMI_MATCH(DMI_BOARD_NAME, "JFL92") }, NULL}, |
| 956 | { |
Alexey Starikovskiy | 0adf3c7 | 2009-10-02 20:21:33 +0400 | [diff] [blame] | 957 | ec_flag_msi, "MSI hardware", { |
Alexey Starikovskiy | 55b313f | 2009-12-22 02:42:52 -0500 | [diff] [blame] | 958 | DMI_MATCH(DMI_BIOS_VENDOR, "Micro-Star")}, NULL}, |
| 959 | { |
| 960 | ec_flag_msi, "MSI hardware", { |
| 961 | DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star")}, NULL}, |
| 962 | { |
| 963 | ec_flag_msi, "MSI hardware", { |
| 964 | DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-Star")}, NULL}, |
Alexey Starikovskiy | 0adf3c7 | 2009-10-02 20:21:33 +0400 | [diff] [blame] | 965 | { |
Alexey Starikovskiy | a5dc4f8 | 2010-12-09 17:07:54 -0500 | [diff] [blame] | 966 | ec_flag_msi, "MSI hardware", { |
| 967 | DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-STAR")}, NULL}, |
| 968 | { |
Zhang Rui | 534bc4e | 2011-04-26 16:30:02 +0800 | [diff] [blame] | 969 | ec_flag_msi, "Quanta hardware", { |
| 970 | DMI_MATCH(DMI_SYS_VENDOR, "Quanta"), |
| 971 | DMI_MATCH(DMI_PRODUCT_NAME, "TW8/SW8/DW8"),}, NULL}, |
| 972 | { |
| 973 | ec_flag_msi, "Quanta hardware", { |
| 974 | DMI_MATCH(DMI_SYS_VENDOR, "Quanta"), |
| 975 | DMI_MATCH(DMI_PRODUCT_NAME, "TW9/SW9"),}, NULL}, |
| 976 | { |
Alexey Starikovskiy | 0adf3c7 | 2009-10-02 20:21:33 +0400 | [diff] [blame] | 977 | ec_validate_ecdt, "ASUS hardware", { |
| 978 | DMI_MATCH(DMI_BIOS_VENDOR, "ASUS") }, NULL}, |
Peter Collingbourne | af986d1 | 2011-04-24 22:09:32 +0100 | [diff] [blame] | 979 | { |
| 980 | ec_validate_ecdt, "ASUS hardware", { |
| 981 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc.") }, NULL}, |
Feng Tang | 67bfa9b | 2012-09-28 15:22:01 +0800 | [diff] [blame] | 982 | { |
| 983 | ec_enlarge_storm_threshold, "CLEVO hardware", { |
| 984 | DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."), |
| 985 | DMI_MATCH(DMI_PRODUCT_NAME, "M720T/M730T"),}, NULL}, |
Lan Tianyu | eff9a4b | 2013-06-05 02:27:51 +0000 | [diff] [blame] | 986 | { |
| 987 | ec_skip_dsdt_scan, "HP Folio 13", { |
| 988 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| 989 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13"),}, NULL}, |
Alexey Starikovskiy | 0adf3c7 | 2009-10-02 20:21:33 +0400 | [diff] [blame] | 990 | {}, |
| 991 | }; |
| 992 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 993 | int __init acpi_ec_ecdt_probe(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | { |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 995 | acpi_status status; |
Alexey Starikovskiy | c6cb0e8 | 2009-01-14 02:57:53 +0300 | [diff] [blame] | 996 | struct acpi_ec *saved_ec = NULL; |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 997 | struct acpi_table_ecdt *ecdt_ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | |
Alexey Starikovskiy | d66d969 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 999 | boot_ec = make_acpi_ec(); |
| 1000 | if (!boot_ec) |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 1001 | return -ENOMEM; |
| 1002 | /* |
| 1003 | * Generate a boot ec context |
| 1004 | */ |
Alexey Starikovskiy | 0adf3c7 | 2009-10-02 20:21:33 +0400 | [diff] [blame] | 1005 | dmi_check_system(ec_dmi_table); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 1006 | status = acpi_get_table(ACPI_SIG_ECDT, 1, |
| 1007 | (struct acpi_table_header **)&ecdt_ptr); |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 1008 | if (ACPI_SUCCESS(status)) { |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 1009 | pr_info(PREFIX "EC description table is found, configuring boot EC\n"); |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 1010 | boot_ec->command_addr = ecdt_ptr->control.address; |
| 1011 | boot_ec->data_addr = ecdt_ptr->data.address; |
| 1012 | boot_ec->gpe = ecdt_ptr->gpe; |
Len Brown | 4af8e10 | 2008-03-11 00:27:16 -0400 | [diff] [blame] | 1013 | boot_ec->handle = ACPI_ROOT_OBJECT; |
Alexey Starikovskiy | ce52ddf | 2008-03-24 23:22:36 +0300 | [diff] [blame] | 1014 | acpi_get_handle(ACPI_ROOT_OBJECT, ecdt_ptr->id, &boot_ec->handle); |
Alexey Starikovskiy | c6cb0e8 | 2009-01-14 02:57:53 +0300 | [diff] [blame] | 1015 | /* Don't trust ECDT, which comes from ASUSTek */ |
Alexey Starikovskiy | 0adf3c7 | 2009-10-02 20:21:33 +0400 | [diff] [blame] | 1016 | if (!EC_FLAGS_VALIDATE_ECDT) |
Alexey Starikovskiy | c5279de | 2008-11-26 17:11:53 -0500 | [diff] [blame] | 1017 | goto install; |
Julia Lawall | d6bd535 | 2010-05-15 23:16:21 +0200 | [diff] [blame] | 1018 | saved_ec = kmemdup(boot_ec, sizeof(struct acpi_ec), GFP_KERNEL); |
Alexey Starikovskiy | c6cb0e8 | 2009-01-14 02:57:53 +0300 | [diff] [blame] | 1019 | if (!saved_ec) |
| 1020 | return -ENOMEM; |
Alexey Starikovskiy | c5279de | 2008-11-26 17:11:53 -0500 | [diff] [blame] | 1021 | /* fall through */ |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 1022 | } |
Alexey Starikovskiy | 0adf3c7 | 2009-10-02 20:21:33 +0400 | [diff] [blame] | 1023 | |
Alexey Starikovskiy | 478fa03 | 2009-10-02 20:21:40 +0400 | [diff] [blame] | 1024 | if (EC_FLAGS_SKIP_DSDT_SCAN) |
| 1025 | return -ENODEV; |
| 1026 | |
Alexey Starikovskiy | c5279de | 2008-11-26 17:11:53 -0500 | [diff] [blame] | 1027 | /* This workaround is needed only on some broken machines, |
| 1028 | * which require early EC, but fail to provide ECDT */ |
Alexey Starikovskiy | c5279de | 2008-11-26 17:11:53 -0500 | [diff] [blame] | 1029 | printk(KERN_DEBUG PREFIX "Look up EC in DSDT\n"); |
| 1030 | status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device, |
| 1031 | boot_ec, NULL); |
| 1032 | /* Check that acpi_get_devices actually find something */ |
| 1033 | if (ACPI_FAILURE(status) || !boot_ec->handle) |
| 1034 | goto error; |
Alexey Starikovskiy | c6cb0e8 | 2009-01-14 02:57:53 +0300 | [diff] [blame] | 1035 | if (saved_ec) { |
| 1036 | /* try to find good ECDT from ASUSTek */ |
| 1037 | if (saved_ec->command_addr != boot_ec->command_addr || |
| 1038 | saved_ec->data_addr != boot_ec->data_addr || |
| 1039 | saved_ec->gpe != boot_ec->gpe || |
| 1040 | saved_ec->handle != boot_ec->handle) |
| 1041 | pr_info(PREFIX "ASUSTek keeps feeding us with broken " |
| 1042 | "ECDT tables, which are very hard to workaround. " |
| 1043 | "Trying to use DSDT EC info instead. Please send " |
| 1044 | "output of acpidump to linux-acpi@vger.kernel.org\n"); |
| 1045 | kfree(saved_ec); |
| 1046 | saved_ec = NULL; |
| 1047 | } else { |
| 1048 | /* We really need to limit this workaround, the only ASUS, |
| 1049 | * which needs it, has fake EC._INI method, so use it as flag. |
| 1050 | * Keep boot_ec struct as it will be needed soon. |
| 1051 | */ |
| 1052 | acpi_handle dummy; |
| 1053 | if (!dmi_name_in_vendors("ASUS") || |
| 1054 | ACPI_FAILURE(acpi_get_handle(boot_ec->handle, "_INI", |
| 1055 | &dummy))) |
| 1056 | return -ENODEV; |
| 1057 | } |
Alexey Starikovskiy | c5279de | 2008-11-26 17:11:53 -0500 | [diff] [blame] | 1058 | install: |
| 1059 | if (!ec_install_handlers(boot_ec)) { |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 1060 | first_ec = boot_ec; |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 1061 | return 0; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 1062 | } |
Alexey Starikovskiy | c5279de | 2008-11-26 17:11:53 -0500 | [diff] [blame] | 1063 | error: |
Alexey Starikovskiy | d66d969 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 1064 | kfree(boot_ec); |
| 1065 | boot_ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | return -ENODEV; |
| 1067 | } |
| 1068 | |
Alexey Starikovskiy | 223883b | 2008-03-21 17:07:21 +0300 | [diff] [blame] | 1069 | static struct acpi_driver acpi_ec_driver = { |
| 1070 | .name = "ec", |
| 1071 | .class = ACPI_EC_CLASS, |
| 1072 | .ids = ec_device_ids, |
| 1073 | .ops = { |
| 1074 | .add = acpi_ec_add, |
| 1075 | .remove = acpi_ec_remove, |
Alexey Starikovskiy | 223883b | 2008-03-21 17:07:21 +0300 | [diff] [blame] | 1076 | }, |
| 1077 | }; |
| 1078 | |
Bjorn Helgaas | a5f820f | 2009-03-24 16:49:48 -0600 | [diff] [blame] | 1079 | int __init acpi_ec_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1081 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | /* Now register the driver for the EC */ |
| 1084 | result = acpi_bus_register_driver(&acpi_ec_driver); |
Thomas Renninger | 49c6c5f | 2010-07-16 13:11:34 +0200 | [diff] [blame] | 1085 | if (result < 0) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1086 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1088 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | } |
| 1090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | /* EC driver currently not unloadable */ |
| 1092 | #if 0 |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1093 | static void __exit acpi_ec_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | |
| 1096 | acpi_bus_unregister_driver(&acpi_ec_driver); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1097 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | } |
Alexey Starikovskiy | 7843932 | 2007-10-22 14:18:43 +0400 | [diff] [blame] | 1099 | #endif /* 0 */ |