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> |
| 37 | #include <linux/proc_fs.h> |
| 38 | #include <linux/seq_file.h> |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 39 | #include <linux/interrupt.h> |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 40 | #include <linux/list.h> |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 41 | #include <linux/spinlock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <asm/io.h> |
| 43 | #include <acpi/acpi_bus.h> |
| 44 | #include <acpi/acpi_drivers.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #define ACPI_EC_CLASS "embedded_controller" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #define ACPI_EC_DEVICE_NAME "Embedded Controller" |
| 48 | #define ACPI_EC_FILE_INFO "info" |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 49 | |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 50 | #undef PREFIX |
| 51 | #define PREFIX "ACPI: EC: " |
Alexey Starikovskiy | 4350933 | 2007-05-29 16:42:57 +0400 | [diff] [blame] | 52 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 53 | /* EC status register */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */ |
| 55 | #define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */ |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 56 | #define ACPI_EC_FLAG_BURST 0x10 /* burst mode */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | #define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */ |
Alexey Starikovskiy | 4350933 | 2007-05-29 16:42:57 +0400 | [diff] [blame] | 58 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 59 | /* EC commands */ |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 60 | enum ec_command { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 61 | ACPI_EC_COMMAND_READ = 0x80, |
| 62 | ACPI_EC_COMMAND_WRITE = 0x81, |
| 63 | ACPI_EC_BURST_ENABLE = 0x82, |
| 64 | ACPI_EC_BURST_DISABLE = 0x83, |
| 65 | ACPI_EC_COMMAND_QUERY = 0x84, |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 66 | }; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 67 | |
Alexey Starikovskiy | 5c40641 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 68 | #define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 69 | #define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ |
Alexey Starikovskiy | 34ff4db | 2009-04-01 00:25:10 -0400 | [diff] [blame] | 70 | #define ACPI_EC_CDELAY 10 /* Wait 10us before polling EC */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 71 | |
Alexey Starikovskiy | 06cf7d3 | 2008-11-09 19:01:06 +0300 | [diff] [blame] | 72 | #define ACPI_EC_STORM_THRESHOLD 8 /* number of false interrupts |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 73 | per one transaction */ |
| 74 | |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 75 | enum { |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 76 | EC_FLAGS_QUERY_PENDING, /* Query is pending */ |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 77 | EC_FLAGS_GPE_MODE, /* Expect GPE to be sent |
| 78 | * for status change */ |
Alexey Starikovskiy | b77d81b | 2008-03-21 17:07:15 +0300 | [diff] [blame] | 79 | EC_FLAGS_NO_GPE, /* Don't use GPE mode */ |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 80 | EC_FLAGS_GPE_STORM, /* GPE storm detected */ |
| 81 | EC_FLAGS_HANDLERS_INSTALLED /* Handlers for GPE and |
| 82 | * OpReg are installed */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | }; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 84 | |
| 85 | /* 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] | 86 | /* External interfaces use first EC only, so remember */ |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 87 | typedef int (*acpi_ec_query_func) (void *data); |
| 88 | |
| 89 | struct acpi_ec_query_handler { |
| 90 | struct list_head node; |
| 91 | acpi_ec_query_func func; |
| 92 | acpi_handle handle; |
| 93 | void *data; |
| 94 | u8 query_bit; |
| 95 | }; |
| 96 | |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 97 | struct transaction { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 98 | const u8 *wdata; |
| 99 | u8 *rdata; |
| 100 | unsigned short irq_count; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 101 | u8 command; |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 102 | u8 wi; |
| 103 | u8 ri; |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 104 | u8 wlen; |
| 105 | u8 rlen; |
Alexey Starikovskiy | dd15f8c | 2008-11-08 21:42:30 +0300 | [diff] [blame] | 106 | bool done; |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 107 | }; |
| 108 | |
Adrian Bunk | a854e08 | 2006-12-19 12:56:12 -0800 | [diff] [blame] | 109 | static struct acpi_ec { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 110 | acpi_handle handle; |
Alexey Starikovskiy | a86e277 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 111 | unsigned long gpe; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 112 | unsigned long command_addr; |
| 113 | unsigned long data_addr; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 114 | unsigned long global_lock; |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 115 | unsigned long flags; |
Alexey Starikovskiy | c787a85 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 116 | struct mutex lock; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 117 | wait_queue_head_t wait; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 118 | struct list_head list; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 119 | struct transaction *curr; |
| 120 | spinlock_t curr_lock; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 121 | } *boot_ec, *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 */ |
| 124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | /* -------------------------------------------------------------------------- |
| 126 | Transaction Management |
| 127 | -------------------------------------------------------------------------- */ |
| 128 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 129 | static inline u8 acpi_ec_read_status(struct acpi_ec *ec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | { |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 131 | u8 x = inb(ec->command_addr); |
Márton Németh | 86dae01 | 2008-01-23 22:33:06 -0500 | [diff] [blame] | 132 | pr_debug(PREFIX "---> status = 0x%2.2x\n", x); |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 133 | return x; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | } |
| 135 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 136 | static inline u8 acpi_ec_read_data(struct acpi_ec *ec) |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 137 | { |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 138 | u8 x = inb(ec->data_addr); |
Márton Németh | 86dae01 | 2008-01-23 22:33:06 -0500 | [diff] [blame] | 139 | pr_debug(PREFIX "---> data = 0x%2.2x\n", x); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 140 | return x; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 141 | } |
| 142 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 143 | 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] | 144 | { |
Márton Németh | 86dae01 | 2008-01-23 22:33:06 -0500 | [diff] [blame] | 145 | pr_debug(PREFIX "<--- command = 0x%2.2x\n", command); |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 146 | outb(command, ec->command_addr); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 147 | } |
| 148 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 149 | 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] | 150 | { |
Márton Németh | 86dae01 | 2008-01-23 22:33:06 -0500 | [diff] [blame] | 151 | pr_debug(PREFIX "<--- data = 0x%2.2x\n", data); |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 152 | outb(data, ec->data_addr); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 153 | } |
| 154 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 155 | static int ec_transaction_done(struct acpi_ec *ec) |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 156 | { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 157 | unsigned long flags; |
| 158 | int ret = 0; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 159 | spin_lock_irqsave(&ec->curr_lock, flags); |
Alexey Starikovskiy | dd15f8c | 2008-11-08 21:42:30 +0300 | [diff] [blame] | 160 | if (!ec->curr || ec->curr->done) |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 161 | ret = 1; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 162 | spin_unlock_irqrestore(&ec->curr_lock, flags); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 163 | return ret; |
| 164 | } |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 165 | |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 166 | static void start_transaction(struct acpi_ec *ec) |
| 167 | { |
| 168 | ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0; |
| 169 | ec->curr->done = false; |
| 170 | acpi_ec_write_cmd(ec, ec->curr->command); |
| 171 | } |
| 172 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 173 | static void gpe_transaction(struct acpi_ec *ec, u8 status) |
| 174 | { |
| 175 | unsigned long flags; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 176 | spin_lock_irqsave(&ec->curr_lock, flags); |
| 177 | if (!ec->curr) |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 178 | goto unlock; |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 179 | if (ec->curr->wlen > ec->curr->wi) { |
| 180 | if ((status & ACPI_EC_FLAG_IBF) == 0) |
| 181 | acpi_ec_write_data(ec, |
| 182 | ec->curr->wdata[ec->curr->wi++]); |
| 183 | else |
Alexey Starikovskiy | dd15f8c | 2008-11-08 21:42:30 +0300 | [diff] [blame] | 184 | goto err; |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 185 | } else if (ec->curr->rlen > ec->curr->ri) { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 186 | if ((status & ACPI_EC_FLAG_OBF) == 1) { |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 187 | ec->curr->rdata[ec->curr->ri++] = acpi_ec_read_data(ec); |
| 188 | if (ec->curr->rlen == ec->curr->ri) |
Alexey Starikovskiy | dd15f8c | 2008-11-08 21:42:30 +0300 | [diff] [blame] | 189 | ec->curr->done = true; |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 190 | } else |
Alexey Starikovskiy | dd15f8c | 2008-11-08 21:42:30 +0300 | [diff] [blame] | 191 | goto err; |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 192 | } else if (ec->curr->wlen == ec->curr->wi && |
| 193 | (status & ACPI_EC_FLAG_IBF) == 0) |
Alexey Starikovskiy | dd15f8c | 2008-11-08 21:42:30 +0300 | [diff] [blame] | 194 | ec->curr->done = true; |
| 195 | goto unlock; |
| 196 | err: |
| 197 | /* false interrupt, state didn't change */ |
Alexey Starikovskiy | 7b4d469 | 2008-11-13 12:00:03 +0300 | [diff] [blame] | 198 | if (in_interrupt()) |
| 199 | ++ec->curr->irq_count; |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 200 | unlock: |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 201 | spin_unlock_irqrestore(&ec->curr_lock, flags); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | static int acpi_ec_wait(struct acpi_ec *ec) |
| 205 | { |
| 206 | if (wait_event_timeout(ec->wait, ec_transaction_done(ec), |
| 207 | msecs_to_jiffies(ACPI_EC_DELAY))) |
| 208 | return 0; |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 209 | /* try restart command if we get any false interrupts */ |
| 210 | if (ec->curr->irq_count && |
| 211 | (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) == 0) { |
| 212 | pr_debug(PREFIX "controller reset, restart transaction\n"); |
| 213 | start_transaction(ec); |
| 214 | if (wait_event_timeout(ec->wait, ec_transaction_done(ec), |
| 215 | msecs_to_jiffies(ACPI_EC_DELAY))) |
| 216 | return 0; |
| 217 | } |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 218 | /* missing GPEs, switch back to poll mode */ |
| 219 | if (printk_ratelimit()) |
| 220 | pr_info(PREFIX "missing confirmations, " |
| 221 | "switch off interrupt mode.\n"); |
| 222 | set_bit(EC_FLAGS_NO_GPE, &ec->flags); |
| 223 | clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); |
| 224 | return 1; |
| 225 | } |
| 226 | |
| 227 | static void acpi_ec_gpe_query(void *ec_cxt); |
| 228 | |
| 229 | static int ec_check_sci(struct acpi_ec *ec, u8 state) |
| 230 | { |
| 231 | if (state & ACPI_EC_FLAG_SCI) { |
| 232 | if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) |
| 233 | return acpi_os_execute(OSL_EC_BURST_HANDLER, |
| 234 | acpi_ec_gpe_query, ec); |
| 235 | } |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 236 | return 0; |
| 237 | } |
| 238 | |
Alexey Starikovskiy | 34ff4db | 2009-04-01 00:25:10 -0400 | [diff] [blame] | 239 | static void ec_delay(void) |
| 240 | { |
| 241 | /* EC in MSI notebooks don't tolerate delays other than 550 usec */ |
| 242 | if (EC_FLAGS_MSI) |
| 243 | udelay(ACPI_EC_DELAY); |
| 244 | else |
| 245 | /* Use shortest sleep available */ |
| 246 | msleep(1); |
| 247 | } |
| 248 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 249 | static int ec_poll(struct acpi_ec *ec) |
Alexey Starikovskiy | 845625c | 2008-03-21 17:07:03 +0300 | [diff] [blame] | 250 | { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 251 | unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); |
Alexey Starikovskiy | 34ff4db | 2009-04-01 00:25:10 -0400 | [diff] [blame] | 252 | udelay(ACPI_EC_CDELAY); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 253 | while (time_before(jiffies, delay)) { |
| 254 | gpe_transaction(ec, acpi_ec_read_status(ec)); |
Alexey Starikovskiy | 34ff4db | 2009-04-01 00:25:10 -0400 | [diff] [blame] | 255 | ec_delay(); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 256 | if (ec_transaction_done(ec)) |
Zhao Yakui | 9d699ed | 2008-08-11 10:33:31 +0800 | [diff] [blame] | 257 | return 0; |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 258 | } |
Alexey Starikovskiy | b77d81b | 2008-03-21 17:07:15 +0300 | [diff] [blame] | 259 | return -ETIME; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 260 | } |
| 261 | |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 262 | static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, |
| 263 | struct transaction *t, |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 264 | int force_poll) |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 265 | { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 266 | unsigned long tmp; |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 267 | int ret = 0; |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 268 | pr_debug(PREFIX "transaction start\n"); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 269 | /* disable GPE during transaction if storm is detected */ |
| 270 | if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { |
| 271 | clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); |
Alexey Starikovskiy | 0b7084a | 2008-10-25 21:48:46 +0400 | [diff] [blame] | 272 | acpi_disable_gpe(NULL, ec->gpe); |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 273 | } |
Alexey Starikovskiy | 5423a0c | 2009-02-21 12:18:13 -0500 | [diff] [blame] | 274 | if (EC_FLAGS_MSI) |
| 275 | udelay(ACPI_EC_DELAY); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 276 | /* start transaction */ |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 277 | spin_lock_irqsave(&ec->curr_lock, tmp); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 278 | /* following two actions should be kept atomic */ |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 279 | ec->curr = t; |
Alexey Starikovskiy | a2f93ae | 2008-11-12 01:40:19 +0300 | [diff] [blame] | 280 | start_transaction(ec); |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 281 | if (ec->curr->command == ACPI_EC_COMMAND_QUERY) |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 282 | clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 283 | spin_unlock_irqrestore(&ec->curr_lock, tmp); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 284 | /* if we selected poll mode or failed in GPE-mode do a poll loop */ |
| 285 | if (force_poll || |
| 286 | !test_bit(EC_FLAGS_GPE_MODE, &ec->flags) || |
| 287 | acpi_ec_wait(ec)) |
| 288 | ret = ec_poll(ec); |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 289 | pr_debug(PREFIX "transaction end\n"); |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 290 | spin_lock_irqsave(&ec->curr_lock, tmp); |
| 291 | ec->curr = NULL; |
| 292 | spin_unlock_irqrestore(&ec->curr_lock, tmp); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 293 | if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { |
| 294 | /* check if we received SCI during transaction */ |
| 295 | ec_check_sci(ec, acpi_ec_read_status(ec)); |
| 296 | /* it is safe to enable GPE outside of transaction */ |
Alexey Starikovskiy | 0b7084a | 2008-10-25 21:48:46 +0400 | [diff] [blame] | 297 | acpi_enable_gpe(NULL, ec->gpe); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 298 | } else if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags) && |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 299 | t->irq_count > ACPI_EC_STORM_THRESHOLD) { |
Alan Jenkins | f824843 | 2008-11-01 11:05:26 +0000 | [diff] [blame] | 300 | pr_info(PREFIX "GPE storm detected, " |
| 301 | "transactions will use polling mode\n"); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 302 | set_bit(EC_FLAGS_GPE_STORM, &ec->flags); |
| 303 | } |
| 304 | return ret; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 305 | } |
| 306 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 307 | static int ec_check_ibf0(struct acpi_ec *ec) |
| 308 | { |
| 309 | u8 status = acpi_ec_read_status(ec); |
| 310 | return (status & ACPI_EC_FLAG_IBF) == 0; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 311 | } |
| 312 | |
Alexey Starikovskiy | c0ff177 | 2008-10-16 02:02:33 +0400 | [diff] [blame] | 313 | static int ec_wait_ibf0(struct acpi_ec *ec) |
| 314 | { |
| 315 | unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); |
| 316 | /* interrupt wait manually if GPE mode is not active */ |
| 317 | unsigned long timeout = test_bit(EC_FLAGS_GPE_MODE, &ec->flags) ? |
| 318 | msecs_to_jiffies(ACPI_EC_DELAY) : msecs_to_jiffies(1); |
| 319 | while (time_before(jiffies, delay)) |
| 320 | if (wait_event_timeout(ec->wait, ec_check_ibf0(ec), timeout)) |
| 321 | return 0; |
| 322 | return -ETIME; |
| 323 | } |
| 324 | |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 325 | static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t, |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 326 | int force_poll) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 327 | { |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 328 | int status; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 329 | u32 glk; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 330 | if (!ec || (!t) || (t->wlen && !t->wdata) || (t->rlen && !t->rdata)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 331 | return -EINVAL; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 332 | if (t->rdata) |
| 333 | memset(t->rdata, 0, t->rlen); |
Alexey Starikovskiy | 523953b | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 334 | mutex_lock(&ec->lock); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 335 | if (ec->global_lock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
Alexey Starikovskiy | c24e912 | 2007-02-15 23:16:18 +0300 | [diff] [blame] | 337 | if (ACPI_FAILURE(status)) { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 338 | status = -ENODEV; |
| 339 | goto unlock; |
Alexey Starikovskiy | c24e912 | 2007-02-15 23:16:18 +0300 | [diff] [blame] | 340 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | } |
Alexey Starikovskiy | c0ff177 | 2008-10-16 02:02:33 +0400 | [diff] [blame] | 342 | if (ec_wait_ibf0(ec)) { |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 343 | pr_err(PREFIX "input buffer is not empty, " |
| 344 | "aborting transaction\n"); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 345 | status = -ETIME; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 346 | goto end; |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 347 | } |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 348 | status = acpi_ec_transaction_unlocked(ec, t, force_poll); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 349 | end: |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 350 | if (ec->global_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | acpi_release_global_lock(glk); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 352 | unlock: |
Alexey Starikovskiy | 523953b | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 353 | mutex_unlock(&ec->lock); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 354 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | } |
| 356 | |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 357 | /* |
| 358 | * Note: samsung nv5000 doesn't work with ec burst mode. |
| 359 | * http://bugzilla.kernel.org/show_bug.cgi?id=4980 |
| 360 | */ |
Roel Kluin | 8a383ef | 2008-12-09 20:45:30 +0100 | [diff] [blame] | 361 | static int acpi_ec_burst_enable(struct acpi_ec *ec) |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 362 | { |
| 363 | u8 d; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 364 | struct transaction t = {.command = ACPI_EC_BURST_ENABLE, |
| 365 | .wdata = NULL, .rdata = &d, |
| 366 | .wlen = 0, .rlen = 1}; |
| 367 | |
| 368 | return acpi_ec_transaction(ec, &t, 0); |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 369 | } |
| 370 | |
Roel Kluin | 8a383ef | 2008-12-09 20:45:30 +0100 | [diff] [blame] | 371 | static int acpi_ec_burst_disable(struct acpi_ec *ec) |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 372 | { |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 373 | struct transaction t = {.command = ACPI_EC_BURST_DISABLE, |
| 374 | .wdata = NULL, .rdata = NULL, |
| 375 | .wlen = 0, .rlen = 0}; |
| 376 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 377 | return (acpi_ec_read_status(ec) & ACPI_EC_FLAG_BURST) ? |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 378 | acpi_ec_transaction(ec, &t, 0) : 0; |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 379 | } |
| 380 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 381 | 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] | 382 | { |
| 383 | int result; |
| 384 | u8 d; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 385 | struct transaction t = {.command = ACPI_EC_COMMAND_READ, |
| 386 | .wdata = &address, .rdata = &d, |
| 387 | .wlen = 1, .rlen = 1}; |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 388 | |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 389 | result = acpi_ec_transaction(ec, &t, 0); |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 390 | *data = d; |
| 391 | return result; |
| 392 | } |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 393 | |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 394 | static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data) |
| 395 | { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 396 | u8 wdata[2] = { address, data }; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 397 | struct transaction t = {.command = ACPI_EC_COMMAND_WRITE, |
| 398 | .wdata = wdata, .rdata = NULL, |
| 399 | .wlen = 2, .rlen = 0}; |
| 400 | |
| 401 | return acpi_ec_transaction(ec, &t, 0); |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 402 | } |
| 403 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | /* |
| 405 | * Externally callable EC access functions. For now, assume 1 EC only |
| 406 | */ |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 407 | int ec_burst_enable(void) |
| 408 | { |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 409 | if (!first_ec) |
| 410 | return -ENODEV; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 411 | return acpi_ec_burst_enable(first_ec); |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | EXPORT_SYMBOL(ec_burst_enable); |
| 415 | |
| 416 | int ec_burst_disable(void) |
| 417 | { |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 418 | if (!first_ec) |
| 419 | return -ENODEV; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 420 | return acpi_ec_burst_disable(first_ec); |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 421 | } |
| 422 | |
| 423 | EXPORT_SYMBOL(ec_burst_disable); |
| 424 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 425 | int ec_read(u8 addr, u8 * val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | int err; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 428 | u8 temp_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
| 430 | if (!first_ec) |
| 431 | return -ENODEV; |
| 432 | |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 433 | err = acpi_ec_read(first_ec, addr, &temp_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
| 435 | if (!err) { |
| 436 | *val = temp_data; |
| 437 | return 0; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 438 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | return err; |
| 440 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 441 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | EXPORT_SYMBOL(ec_read); |
| 443 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 444 | int ec_write(u8 addr, u8 val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | int err; |
| 447 | |
| 448 | if (!first_ec) |
| 449 | return -ENODEV; |
| 450 | |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 451 | err = acpi_ec_write(first_ec, addr, val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
| 453 | return err; |
| 454 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 455 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | EXPORT_SYMBOL(ec_write); |
| 457 | |
Randy Dunlap | 616362d | 2006-10-27 01:47:34 -0400 | [diff] [blame] | 458 | int ec_transaction(u8 command, |
Alexey Starikovskiy | 9e19721 | 2007-03-07 18:29:35 -0500 | [diff] [blame] | 459 | const u8 * wdata, unsigned wdata_len, |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 460 | u8 * rdata, unsigned rdata_len, |
| 461 | int force_poll) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 462 | { |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 463 | struct transaction t = {.command = command, |
| 464 | .wdata = wdata, .rdata = rdata, |
| 465 | .wlen = wdata_len, .rlen = rdata_len}; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 466 | if (!first_ec) |
| 467 | return -ENODEV; |
| 468 | |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 469 | return acpi_ec_transaction(first_ec, &t, force_poll); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 470 | } |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 471 | |
Lennart Poettering | ab9e43c | 2006-10-03 22:49:00 -0400 | [diff] [blame] | 472 | EXPORT_SYMBOL(ec_transaction); |
| 473 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 474 | static int acpi_ec_query(struct acpi_ec *ec, u8 * data) |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 475 | { |
| 476 | int result; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 477 | u8 d; |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 478 | struct transaction t = {.command = ACPI_EC_COMMAND_QUERY, |
| 479 | .wdata = NULL, .rdata = &d, |
| 480 | .wlen = 0, .rlen = 1}; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 481 | if (!ec || !data) |
| 482 | return -EINVAL; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 483 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 484 | /* |
| 485 | * Query the EC to find out which _Qxx method we need to evaluate. |
| 486 | * Note that successful completion of the query causes the ACPI_EC_SCI |
| 487 | * bit to be cleared (and thus clearing the interrupt source). |
| 488 | */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 489 | |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 490 | result = acpi_ec_transaction(ec, &t, 0); |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 491 | if (result) |
| 492 | return result; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 493 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 494 | if (!d) |
| 495 | return -ENODATA; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 496 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 497 | *data = d; |
| 498 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
| 500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | /* -------------------------------------------------------------------------- |
| 502 | Event Management |
| 503 | -------------------------------------------------------------------------- */ |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 504 | int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit, |
| 505 | acpi_handle handle, acpi_ec_query_func func, |
| 506 | void *data) |
| 507 | { |
| 508 | struct acpi_ec_query_handler *handler = |
| 509 | kzalloc(sizeof(struct acpi_ec_query_handler), GFP_KERNEL); |
| 510 | if (!handler) |
| 511 | return -ENOMEM; |
| 512 | |
| 513 | handler->query_bit = query_bit; |
| 514 | handler->handle = handle; |
| 515 | handler->func = func; |
| 516 | handler->data = data; |
| 517 | mutex_lock(&ec->lock); |
Alexey Starikovskiy | 30c0857 | 2007-09-26 19:43:22 +0400 | [diff] [blame] | 518 | list_add(&handler->node, &ec->list); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 519 | mutex_unlock(&ec->lock); |
| 520 | return 0; |
| 521 | } |
| 522 | |
| 523 | EXPORT_SYMBOL_GPL(acpi_ec_add_query_handler); |
| 524 | |
| 525 | void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit) |
| 526 | { |
Adrian Bunk | 1544fdb | 2007-10-24 18:26:00 +0200 | [diff] [blame] | 527 | struct acpi_ec_query_handler *handler, *tmp; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 528 | mutex_lock(&ec->lock); |
Adrian Bunk | 1544fdb | 2007-10-24 18:26:00 +0200 | [diff] [blame] | 529 | list_for_each_entry_safe(handler, tmp, &ec->list, node) { |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 530 | if (query_bit == handler->query_bit) { |
| 531 | list_del(&handler->node); |
| 532 | kfree(handler); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 533 | } |
| 534 | } |
| 535 | mutex_unlock(&ec->lock); |
| 536 | } |
| 537 | |
| 538 | EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 540 | static void acpi_ec_gpe_query(void *ec_cxt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | { |
Alexey Starikovskiy | 3d02b90 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 542 | struct acpi_ec *ec = ec_cxt; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 543 | u8 value = 0; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 544 | struct acpi_ec_query_handler *handler, copy; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 545 | |
Alexey Starikovskiy | 5d0c288 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 546 | if (!ec || acpi_ec_query(ec, &value)) |
Alexey Starikovskiy | e41334c | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 547 | return; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 548 | mutex_lock(&ec->lock); |
| 549 | list_for_each_entry(handler, &ec->list, node) { |
| 550 | if (value == handler->query_bit) { |
| 551 | /* have custom handler for this bit */ |
| 552 | memcpy(©, handler, sizeof(copy)); |
| 553 | mutex_unlock(&ec->lock); |
| 554 | if (copy.func) { |
| 555 | copy.func(copy.data); |
| 556 | } else if (copy.handle) { |
| 557 | acpi_evaluate_object(copy.handle, NULL, NULL, NULL); |
| 558 | } |
| 559 | return; |
| 560 | } |
| 561 | } |
| 562 | mutex_unlock(&ec->lock); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 563 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 565 | static u32 acpi_ec_gpe_handler(void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | { |
Alexey Starikovskiy | 3d02b90 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 567 | struct acpi_ec *ec = data; |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 568 | u8 status; |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 569 | |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 570 | pr_debug(PREFIX "~~~> interrupt\n"); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 571 | status = acpi_ec_read_status(ec); |
| 572 | |
Alexey Starikovskiy | 8517934 | 2008-11-11 12:54:11 +0300 | [diff] [blame] | 573 | if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) { |
| 574 | gpe_transaction(ec, status); |
| 575 | if (ec_transaction_done(ec) && |
| 576 | (status & ACPI_EC_FLAG_IBF) == 0) |
| 577 | wake_up(&ec->wait); |
| 578 | } |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 579 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 580 | ec_check_sci(ec, status); |
| 581 | if (!test_bit(EC_FLAGS_GPE_MODE, &ec->flags) && |
| 582 | !test_bit(EC_FLAGS_NO_GPE, &ec->flags)) { |
Alexey Starikovskiy | 95b937e | 2007-10-22 14:19:03 +0400 | [diff] [blame] | 583 | /* this is non-query, must be confirmation */ |
Alan Jenkins | f824843 | 2008-11-01 11:05:26 +0000 | [diff] [blame] | 584 | if (!test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { |
| 585 | if (printk_ratelimit()) |
| 586 | pr_info(PREFIX "non-query interrupt received," |
| 587 | " switching to interrupt mode\n"); |
| 588 | } else { |
| 589 | /* hush, STORM switches the mode every transaction */ |
| 590 | pr_debug(PREFIX "non-query interrupt received," |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 591 | " switching to interrupt mode\n"); |
Alan Jenkins | f824843 | 2008-11-01 11:05:26 +0000 | [diff] [blame] | 592 | } |
Alexey Starikovskiy | 7843932 | 2007-10-22 14:18:43 +0400 | [diff] [blame] | 593 | set_bit(EC_FLAGS_GPE_MODE, &ec->flags); |
Alexey Starikovskiy | 95b937e | 2007-10-22 14:19:03 +0400 | [diff] [blame] | 594 | } |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 595 | return ACPI_INTERRUPT_HANDLED; |
Alexey Starikovskiy | 845625c | 2008-03-21 17:07:03 +0300 | [diff] [blame] | 596 | } |
| 597 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | /* -------------------------------------------------------------------------- |
| 599 | Address Space Management |
| 600 | -------------------------------------------------------------------------- */ |
| 601 | |
| 602 | static acpi_status |
Alexey Starikovskiy | 5b7734b | 2007-05-29 16:42:52 +0400 | [diff] [blame] | 603 | acpi_ec_space_handler(u32 function, acpi_physical_address address, |
| 604 | u32 bits, acpi_integer *value, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 605 | void *handler_context, void *region_context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | { |
Alexey Starikovskiy | 3d02b90 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 607 | struct acpi_ec *ec = handler_context; |
Alexey Starikovskiy | 3e71a87 | 2008-01-11 02:42:51 +0300 | [diff] [blame] | 608 | int result = 0, i; |
Alexey Starikovskiy | 5b7734b | 2007-05-29 16:42:52 +0400 | [diff] [blame] | 609 | u8 temp = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | if ((address > 0xFF) || !value || !handler_context) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 612 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | |
Alexey Starikovskiy | 5b7734b | 2007-05-29 16:42:52 +0400 | [diff] [blame] | 614 | if (function != ACPI_READ && function != ACPI_WRITE) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 615 | return AE_BAD_PARAMETER; |
Alexey Starikovskiy | 5b7734b | 2007-05-29 16:42:52 +0400 | [diff] [blame] | 616 | |
| 617 | if (bits != 8 && acpi_strict) |
| 618 | return AE_BAD_PARAMETER; |
| 619 | |
Alexey Starikovskiy | b3b233c | 2008-01-11 02:42:57 +0300 | [diff] [blame] | 620 | acpi_ec_burst_enable(ec); |
| 621 | |
Alexey Starikovskiy | 3e71a87 | 2008-01-11 02:42:51 +0300 | [diff] [blame] | 622 | if (function == ACPI_READ) { |
| 623 | result = acpi_ec_read(ec, address, &temp); |
| 624 | *value = temp; |
| 625 | } else { |
| 626 | temp = 0xff & (*value); |
| 627 | result = acpi_ec_write(ec, address, temp); |
| 628 | } |
| 629 | |
| 630 | for (i = 8; unlikely(bits - i > 0); i += 8) { |
| 631 | ++address; |
Alexey Starikovskiy | 5b7734b | 2007-05-29 16:42:52 +0400 | [diff] [blame] | 632 | if (function == ACPI_READ) { |
| 633 | result = acpi_ec_read(ec, address, &temp); |
| 634 | (*value) |= ((acpi_integer)temp) << i; |
| 635 | } else { |
| 636 | temp = 0xff & ((*value) >> i); |
| 637 | result = acpi_ec_write(ec, address, temp); |
| 638 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | } |
| 640 | |
Alexey Starikovskiy | b3b233c | 2008-01-11 02:42:57 +0300 | [diff] [blame] | 641 | acpi_ec_burst_disable(ec); |
| 642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | switch (result) { |
| 644 | case -EINVAL: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 645 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | break; |
| 647 | case -ENODEV: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 648 | return AE_NOT_FOUND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | break; |
| 650 | case -ETIME: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 651 | return AE_TIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | break; |
| 653 | default: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 654 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | } |
| 657 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | /* -------------------------------------------------------------------------- |
| 659 | FS Interface (/proc) |
| 660 | -------------------------------------------------------------------------- */ |
| 661 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 662 | static struct proc_dir_entry *acpi_ec_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 664 | static int acpi_ec_read_info(struct seq_file *seq, void *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | { |
Alexey Starikovskiy | 3d02b90 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 666 | struct acpi_ec *ec = seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | if (!ec) |
| 669 | goto end; |
| 670 | |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 671 | seq_printf(seq, "gpe:\t\t\t0x%02x\n", (u32) ec->gpe); |
| 672 | seq_printf(seq, "ports:\t\t\t0x%02x, 0x%02x\n", |
| 673 | (unsigned)ec->command_addr, (unsigned)ec->data_addr); |
| 674 | seq_printf(seq, "use global lock:\t%s\n", |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 675 | ec->global_lock ? "yes" : "no"); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 676 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 677 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | } |
| 679 | |
| 680 | static int acpi_ec_info_open_fs(struct inode *inode, struct file *file) |
| 681 | { |
| 682 | return single_open(file, acpi_ec_read_info, PDE(inode)->data); |
| 683 | } |
| 684 | |
Jan Engelhardt | 070d8eb | 2009-01-12 00:07:55 +0100 | [diff] [blame] | 685 | static const struct file_operations acpi_ec_info_ops = { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 686 | .open = acpi_ec_info_open_fs, |
| 687 | .read = seq_read, |
| 688 | .llseek = seq_lseek, |
| 689 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | .owner = THIS_MODULE, |
| 691 | }; |
| 692 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 693 | static int acpi_ec_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 695 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | if (!acpi_device_dir(device)) { |
| 698 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 699 | acpi_ec_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 701 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | } |
| 703 | |
Denis V. Lunev | cf7acfa | 2008-04-29 01:02:27 -0700 | [diff] [blame] | 704 | entry = proc_create_data(ACPI_EC_FILE_INFO, S_IRUGO, |
| 705 | acpi_device_dir(device), |
| 706 | &acpi_ec_info_ops, acpi_driver_data(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 708 | return -ENODEV; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 709 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | } |
| 711 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 712 | static int acpi_ec_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | |
| 715 | if (acpi_device_dir(device)) { |
| 716 | remove_proc_entry(ACPI_EC_FILE_INFO, acpi_device_dir(device)); |
| 717 | remove_proc_entry(acpi_device_bid(device), acpi_ec_dir); |
| 718 | acpi_device_dir(device) = NULL; |
| 719 | } |
| 720 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 721 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | } |
| 723 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | /* -------------------------------------------------------------------------- |
| 725 | Driver Interface |
| 726 | -------------------------------------------------------------------------- */ |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 727 | static acpi_status |
| 728 | ec_parse_io_ports(struct acpi_resource *resource, void *context); |
| 729 | |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 730 | static struct acpi_ec *make_acpi_ec(void) |
| 731 | { |
| 732 | struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
| 733 | if (!ec) |
| 734 | return NULL; |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 735 | ec->flags = 1 << EC_FLAGS_QUERY_PENDING; |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 736 | mutex_init(&ec->lock); |
| 737 | init_waitqueue_head(&ec->wait); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 738 | INIT_LIST_HEAD(&ec->list); |
Alexey Starikovskiy | 8463200 | 2008-09-26 00:54:28 +0400 | [diff] [blame] | 739 | spin_lock_init(&ec->curr_lock); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 740 | return ec; |
| 741 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 743 | static acpi_status |
Alexey Starikovskiy | c019b19 | 2007-08-14 01:03:42 -0400 | [diff] [blame] | 744 | acpi_ec_register_query_methods(acpi_handle handle, u32 level, |
| 745 | void *context, void **return_value) |
| 746 | { |
Lin Ming | 0175d56 | 2008-12-16 16:46:12 +0800 | [diff] [blame] | 747 | char node_name[5]; |
| 748 | struct acpi_buffer buffer = { sizeof(node_name), node_name }; |
Alexey Starikovskiy | c019b19 | 2007-08-14 01:03:42 -0400 | [diff] [blame] | 749 | struct acpi_ec *ec = context; |
| 750 | int value = 0; |
Lin Ming | 0175d56 | 2008-12-16 16:46:12 +0800 | [diff] [blame] | 751 | acpi_status status; |
| 752 | |
| 753 | status = acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); |
| 754 | |
| 755 | if (ACPI_SUCCESS(status) && sscanf(node_name, "_Q%x", &value) == 1) { |
Alexey Starikovskiy | c019b19 | 2007-08-14 01:03:42 -0400 | [diff] [blame] | 756 | acpi_ec_add_query_handler(ec, value, handle, NULL, NULL); |
| 757 | } |
| 758 | return AE_OK; |
| 759 | } |
| 760 | |
| 761 | static acpi_status |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 762 | ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval) |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 763 | { |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 764 | acpi_status status; |
Alexey Starikovskiy | d21cf3c | 2008-11-03 14:26:40 -0500 | [diff] [blame] | 765 | unsigned long long tmp = 0; |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 766 | |
| 767 | struct acpi_ec *ec = context; |
Alexey Starikovskiy | a5032bf | 2009-04-01 01:33:15 -0400 | [diff] [blame] | 768 | |
| 769 | /* clear addr values, ec_parse_io_ports depend on it */ |
| 770 | ec->command_addr = ec->data_addr = 0; |
| 771 | |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 772 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
| 773 | ec_parse_io_ports, ec); |
| 774 | if (ACPI_FAILURE(status)) |
| 775 | return status; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 776 | |
| 777 | /* Get GPE bit assignment (EC events). */ |
| 778 | /* TODO: Add support for _GPE returning a package */ |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 779 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp); |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 780 | if (ACPI_FAILURE(status)) |
| 781 | return status; |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 782 | ec->gpe = tmp; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 783 | /* Use the global lock for all EC transactions? */ |
Alexey Starikovskiy | d21cf3c | 2008-11-03 14:26:40 -0500 | [diff] [blame] | 784 | tmp = 0; |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 785 | acpi_evaluate_integer(handle, "_GLK", NULL, &tmp); |
| 786 | ec->global_lock = tmp; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 787 | ec->handle = handle; |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 788 | return AE_CTRL_TERMINATE; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 789 | } |
| 790 | |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 791 | static void ec_remove_handlers(struct acpi_ec *ec) |
| 792 | { |
| 793 | if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle, |
| 794 | ACPI_ADR_SPACE_EC, &acpi_ec_space_handler))) |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 795 | pr_err(PREFIX "failed to remove space handler\n"); |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 796 | if (ACPI_FAILURE(acpi_remove_gpe_handler(NULL, ec->gpe, |
| 797 | &acpi_ec_gpe_handler))) |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 798 | pr_err(PREFIX "failed to remove gpe handler\n"); |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 799 | clear_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags); |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 800 | } |
| 801 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 802 | static int acpi_ec_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 804 | struct acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 807 | return -EINVAL; |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 808 | strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); |
| 809 | strcpy(acpi_device_class(device), ACPI_EC_CLASS); |
| 810 | |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 811 | /* Check for boot EC */ |
Alexey Starikovskiy | ce52ddf | 2008-03-24 23:22:36 +0300 | [diff] [blame] | 812 | if (boot_ec && |
| 813 | (boot_ec->handle == device->handle || |
| 814 | boot_ec->handle == ACPI_ROOT_OBJECT)) { |
| 815 | ec = boot_ec; |
| 816 | boot_ec = NULL; |
| 817 | } else { |
| 818 | ec = make_acpi_ec(); |
| 819 | if (!ec) |
| 820 | return -ENOMEM; |
Alexey Starikovskiy | a5032bf | 2009-04-01 01:33:15 -0400 | [diff] [blame] | 821 | } |
| 822 | if (ec_parse_device(device->handle, 0, ec, NULL) != |
| 823 | AE_CTRL_TERMINATE) { |
Alexey Starikovskiy | ce52ddf | 2008-03-24 23:22:36 +0300 | [diff] [blame] | 824 | kfree(ec); |
| 825 | return -EINVAL; |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 826 | } |
| 827 | |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 828 | ec->handle = device->handle; |
Alexey Starikovskiy | ce52ddf | 2008-03-24 23:22:36 +0300 | [diff] [blame] | 829 | |
| 830 | /* Find and register all query methods */ |
| 831 | acpi_walk_namespace(ACPI_TYPE_METHOD, ec->handle, 1, |
| 832 | acpi_ec_register_query_methods, ec, NULL); |
| 833 | |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 834 | if (!first_ec) |
| 835 | first_ec = ec; |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 836 | device->driver_data = ec; |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 837 | acpi_ec_add_fs(device); |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 838 | pr_info(PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n", |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 839 | ec->gpe, ec->command_addr, ec->data_addr); |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 840 | pr_info(PREFIX "driver started in %s mode\n", |
Alexey Starikovskiy | 95b937e | 2007-10-22 14:19:03 +0400 | [diff] [blame] | 841 | (test_bit(EC_FLAGS_GPE_MODE, &ec->flags))?"interrupt":"poll"); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 842 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | } |
| 844 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 845 | static int acpi_ec_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | { |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 847 | struct acpi_ec *ec; |
Adrian Bunk | 07ddf76 | 2007-07-29 17:00:37 +0200 | [diff] [blame] | 848 | struct acpi_ec_query_handler *handler, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 851 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | |
| 853 | ec = acpi_driver_data(device); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 854 | mutex_lock(&ec->lock); |
Adrian Bunk | 07ddf76 | 2007-07-29 17:00:37 +0200 | [diff] [blame] | 855 | list_for_each_entry_safe(handler, tmp, &ec->list, node) { |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 856 | list_del(&handler->node); |
| 857 | kfree(handler); |
| 858 | } |
| 859 | mutex_unlock(&ec->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | acpi_ec_remove_fs(device); |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 861 | device->driver_data = NULL; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 862 | if (ec == first_ec) |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 863 | first_ec = NULL; |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 864 | kfree(ec); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 865 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | } |
| 867 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | static acpi_status |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 869 | ec_parse_io_ports(struct acpi_resource *resource, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | { |
Alexey Starikovskiy | 3d02b90 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 871 | struct acpi_ec *ec = context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 873 | if (resource->type != ACPI_RESOURCE_TYPE_IO) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | |
| 876 | /* |
| 877 | * The first address region returned is the data port, and |
| 878 | * the second address region returned is the status/command |
| 879 | * port. |
| 880 | */ |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 881 | if (ec->data_addr == 0) |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 882 | ec->data_addr = resource->data.io.minimum; |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 883 | else if (ec->command_addr == 0) |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 884 | ec->command_addr = resource->data.io.minimum; |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 885 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | return AE_CTRL_TERMINATE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | return AE_OK; |
| 889 | } |
| 890 | |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 891 | static int ec_install_handlers(struct acpi_ec *ec) |
| 892 | { |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 893 | acpi_status status; |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 894 | if (test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags)) |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 895 | return 0; |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 896 | status = acpi_install_gpe_handler(NULL, ec->gpe, |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 897 | ACPI_GPE_EDGE_TRIGGERED, |
| 898 | &acpi_ec_gpe_handler, ec); |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 899 | if (ACPI_FAILURE(status)) |
| 900 | return -ENODEV; |
| 901 | acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); |
Alexey Starikovskiy | 0b7084a | 2008-10-25 21:48:46 +0400 | [diff] [blame] | 902 | acpi_enable_gpe(NULL, ec->gpe); |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 903 | status = acpi_install_address_space_handler(ec->handle, |
| 904 | ACPI_ADR_SPACE_EC, |
| 905 | &acpi_ec_space_handler, |
Alexey Starikovskiy | 6d9e112 | 2008-03-24 23:22:29 +0300 | [diff] [blame] | 906 | NULL, ec); |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 907 | if (ACPI_FAILURE(status)) { |
Zhao Yakui | 20edd74 | 2008-10-17 02:02:44 -0400 | [diff] [blame] | 908 | if (status == AE_NOT_FOUND) { |
| 909 | /* |
| 910 | * Maybe OS fails in evaluating the _REG object. |
| 911 | * The AE_NOT_FOUND error will be ignored and OS |
| 912 | * continue to initialize EC. |
| 913 | */ |
| 914 | printk(KERN_ERR "Fail in evaluating the _REG object" |
| 915 | " of EC device. Broken bios is suspected.\n"); |
| 916 | } else { |
| 917 | acpi_remove_gpe_handler(NULL, ec->gpe, |
| 918 | &acpi_ec_gpe_handler); |
| 919 | return -ENODEV; |
| 920 | } |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 921 | } |
| 922 | |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 923 | set_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags); |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 924 | return 0; |
| 925 | } |
| 926 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 927 | static int acpi_ec_start(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | { |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 929 | struct acpi_ec *ec; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 930 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 933 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | |
| 935 | ec = acpi_driver_data(device); |
| 936 | |
| 937 | if (!ec) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 938 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 940 | ret = ec_install_handlers(ec); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 941 | |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 942 | /* EC is fully operational, allow queries */ |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 943 | clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 944 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | } |
| 946 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 947 | static int acpi_ec_stop(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | { |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 949 | struct acpi_ec *ec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 951 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | ec = acpi_driver_data(device); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 953 | if (!ec) |
| 954 | return -EINVAL; |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 955 | ec_remove_handlers(ec); |
Alexey Starikovskiy | f9319f9 | 2007-08-24 08:10:11 +0400 | [diff] [blame] | 956 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 957 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | } |
| 959 | |
Alexey Starikovskiy | c04209a | 2008-01-01 14:12:55 -0500 | [diff] [blame] | 960 | int __init acpi_boot_ec_enable(void) |
| 961 | { |
Alexey Starikovskiy | 7c6db4e | 2008-09-25 21:00:31 +0400 | [diff] [blame] | 962 | if (!boot_ec || test_bit(EC_FLAGS_HANDLERS_INSTALLED, &boot_ec->flags)) |
Alexey Starikovskiy | c04209a | 2008-01-01 14:12:55 -0500 | [diff] [blame] | 963 | return 0; |
| 964 | if (!ec_install_handlers(boot_ec)) { |
| 965 | first_ec = boot_ec; |
| 966 | return 0; |
| 967 | } |
| 968 | return -EFAULT; |
| 969 | } |
| 970 | |
Alexey Starikovskiy | 223883b | 2008-03-21 17:07:21 +0300 | [diff] [blame] | 971 | static const struct acpi_device_id ec_device_ids[] = { |
| 972 | {"PNP0C09", 0}, |
| 973 | {"", 0}, |
| 974 | }; |
| 975 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 976 | int __init acpi_ec_ecdt_probe(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | { |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 978 | acpi_status status; |
Alexey Starikovskiy | c6cb0e8 | 2009-01-14 02:57:53 +0300 | [diff] [blame] | 979 | struct acpi_ec *saved_ec = NULL; |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 980 | struct acpi_table_ecdt *ecdt_ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | |
Alexey Starikovskiy | d66d969 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 982 | boot_ec = make_acpi_ec(); |
| 983 | if (!boot_ec) |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 984 | return -ENOMEM; |
| 985 | /* |
| 986 | * Generate a boot ec context |
| 987 | */ |
Alexey Starikovskiy | 5423a0c | 2009-02-21 12:18:13 -0500 | [diff] [blame] | 988 | if (dmi_name_in_vendors("Micro-Star") || |
| 989 | dmi_name_in_vendors("Notebook")) { |
| 990 | pr_info(PREFIX "Enabling special treatment for EC from MSI.\n"); |
| 991 | EC_FLAGS_MSI = 1; |
| 992 | } |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 993 | status = acpi_get_table(ACPI_SIG_ECDT, 1, |
| 994 | (struct acpi_table_header **)&ecdt_ptr); |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 995 | if (ACPI_SUCCESS(status)) { |
Márton Németh | 3ebe08a | 2007-11-21 03:23:26 +0300 | [diff] [blame] | 996 | pr_info(PREFIX "EC description table is found, configuring boot EC\n"); |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 997 | boot_ec->command_addr = ecdt_ptr->control.address; |
| 998 | boot_ec->data_addr = ecdt_ptr->data.address; |
| 999 | boot_ec->gpe = ecdt_ptr->gpe; |
Len Brown | 4af8e10 | 2008-03-11 00:27:16 -0400 | [diff] [blame] | 1000 | boot_ec->handle = ACPI_ROOT_OBJECT; |
Alexey Starikovskiy | ce52ddf | 2008-03-24 23:22:36 +0300 | [diff] [blame] | 1001 | acpi_get_handle(ACPI_ROOT_OBJECT, ecdt_ptr->id, &boot_ec->handle); |
Alexey Starikovskiy | c6cb0e8 | 2009-01-14 02:57:53 +0300 | [diff] [blame] | 1002 | /* Don't trust ECDT, which comes from ASUSTek */ |
Alexey Starikovskiy | a5032bf | 2009-04-01 01:33:15 -0400 | [diff] [blame] | 1003 | if (!dmi_name_in_vendors("ASUS") && EC_FLAGS_MSI == 0) |
Alexey Starikovskiy | c5279de | 2008-11-26 17:11:53 -0500 | [diff] [blame] | 1004 | goto install; |
Alexey Starikovskiy | c6cb0e8 | 2009-01-14 02:57:53 +0300 | [diff] [blame] | 1005 | saved_ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
| 1006 | if (!saved_ec) |
| 1007 | return -ENOMEM; |
Alexey Starikovskiy | a5032bf | 2009-04-01 01:33:15 -0400 | [diff] [blame] | 1008 | memcpy(saved_ec, boot_ec, sizeof(struct acpi_ec)); |
Alexey Starikovskiy | c5279de | 2008-11-26 17:11:53 -0500 | [diff] [blame] | 1009 | /* fall through */ |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 1010 | } |
Alexey Starikovskiy | c5279de | 2008-11-26 17:11:53 -0500 | [diff] [blame] | 1011 | /* This workaround is needed only on some broken machines, |
| 1012 | * which require early EC, but fail to provide ECDT */ |
Alexey Starikovskiy | c5279de | 2008-11-26 17:11:53 -0500 | [diff] [blame] | 1013 | printk(KERN_DEBUG PREFIX "Look up EC in DSDT\n"); |
| 1014 | status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device, |
| 1015 | boot_ec, NULL); |
| 1016 | /* Check that acpi_get_devices actually find something */ |
| 1017 | if (ACPI_FAILURE(status) || !boot_ec->handle) |
| 1018 | goto error; |
Alexey Starikovskiy | c6cb0e8 | 2009-01-14 02:57:53 +0300 | [diff] [blame] | 1019 | if (saved_ec) { |
| 1020 | /* try to find good ECDT from ASUSTek */ |
| 1021 | if (saved_ec->command_addr != boot_ec->command_addr || |
| 1022 | saved_ec->data_addr != boot_ec->data_addr || |
| 1023 | saved_ec->gpe != boot_ec->gpe || |
| 1024 | saved_ec->handle != boot_ec->handle) |
| 1025 | pr_info(PREFIX "ASUSTek keeps feeding us with broken " |
| 1026 | "ECDT tables, which are very hard to workaround. " |
| 1027 | "Trying to use DSDT EC info instead. Please send " |
| 1028 | "output of acpidump to linux-acpi@vger.kernel.org\n"); |
| 1029 | kfree(saved_ec); |
| 1030 | saved_ec = NULL; |
| 1031 | } else { |
| 1032 | /* We really need to limit this workaround, the only ASUS, |
| 1033 | * which needs it, has fake EC._INI method, so use it as flag. |
| 1034 | * Keep boot_ec struct as it will be needed soon. |
| 1035 | */ |
| 1036 | acpi_handle dummy; |
| 1037 | if (!dmi_name_in_vendors("ASUS") || |
| 1038 | ACPI_FAILURE(acpi_get_handle(boot_ec->handle, "_INI", |
| 1039 | &dummy))) |
| 1040 | return -ENODEV; |
| 1041 | } |
Alexey Starikovskiy | c5279de | 2008-11-26 17:11:53 -0500 | [diff] [blame] | 1042 | install: |
| 1043 | if (!ec_install_handlers(boot_ec)) { |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 1044 | first_ec = boot_ec; |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 1045 | return 0; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 1046 | } |
Alexey Starikovskiy | c5279de | 2008-11-26 17:11:53 -0500 | [diff] [blame] | 1047 | error: |
Alexey Starikovskiy | d66d969 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 1048 | kfree(boot_ec); |
| 1049 | boot_ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | return -ENODEV; |
| 1051 | } |
| 1052 | |
Alexey Starikovskiy | 223883b | 2008-03-21 17:07:21 +0300 | [diff] [blame] | 1053 | static int acpi_ec_suspend(struct acpi_device *device, pm_message_t state) |
| 1054 | { |
| 1055 | struct acpi_ec *ec = acpi_driver_data(device); |
| 1056 | /* Stop using GPE */ |
| 1057 | set_bit(EC_FLAGS_NO_GPE, &ec->flags); |
| 1058 | clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); |
Alexey Starikovskiy | 0b7084a | 2008-10-25 21:48:46 +0400 | [diff] [blame] | 1059 | acpi_disable_gpe(NULL, ec->gpe); |
Alexey Starikovskiy | 223883b | 2008-03-21 17:07:21 +0300 | [diff] [blame] | 1060 | return 0; |
| 1061 | } |
| 1062 | |
| 1063 | static int acpi_ec_resume(struct acpi_device *device) |
| 1064 | { |
| 1065 | struct acpi_ec *ec = acpi_driver_data(device); |
| 1066 | /* Enable use of GPE back */ |
| 1067 | clear_bit(EC_FLAGS_NO_GPE, &ec->flags); |
Almer S. Tigelaar | 5aa63f0 | 2009-04-12 11:26:29 +0000 | [diff] [blame] | 1068 | set_bit(EC_FLAGS_GPE_MODE, &ec->flags); |
Alexey Starikovskiy | 0b7084a | 2008-10-25 21:48:46 +0400 | [diff] [blame] | 1069 | acpi_enable_gpe(NULL, ec->gpe); |
Alexey Starikovskiy | 223883b | 2008-03-21 17:07:21 +0300 | [diff] [blame] | 1070 | return 0; |
| 1071 | } |
| 1072 | |
| 1073 | static struct acpi_driver acpi_ec_driver = { |
| 1074 | .name = "ec", |
| 1075 | .class = ACPI_EC_CLASS, |
| 1076 | .ids = ec_device_ids, |
| 1077 | .ops = { |
| 1078 | .add = acpi_ec_add, |
| 1079 | .remove = acpi_ec_remove, |
| 1080 | .start = acpi_ec_start, |
| 1081 | .stop = acpi_ec_stop, |
| 1082 | .suspend = acpi_ec_suspend, |
| 1083 | .resume = acpi_ec_resume, |
| 1084 | }, |
| 1085 | }; |
| 1086 | |
Bjorn Helgaas | a5f820f | 2009-03-24 16:49:48 -0600 | [diff] [blame] | 1087 | int __init acpi_ec_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1089 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir); |
| 1092 | if (!acpi_ec_dir) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1093 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
| 1095 | /* Now register the driver for the EC */ |
| 1096 | result = acpi_bus_register_driver(&acpi_ec_driver); |
| 1097 | if (result < 0) { |
| 1098 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1099 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | } |
| 1101 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1102 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | } |
| 1104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | /* EC driver currently not unloadable */ |
| 1106 | #if 0 |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1107 | static void __exit acpi_ec_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | |
| 1110 | acpi_bus_unregister_driver(&acpi_ec_driver); |
| 1111 | |
| 1112 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); |
| 1113 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1114 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | } |
Alexey Starikovskiy | 7843932 | 2007-10-22 14:18:43 +0400 | [diff] [blame] | 1116 | #endif /* 0 */ |