Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * acpi_ec.c - ACPI Embedded Controller Driver ($Revision: 38 $) |
| 3 | * |
| 4 | * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> |
| 5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 7 | * |
| 8 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or (at |
| 13 | * your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License along |
| 21 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 23 | * |
| 24 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 25 | */ |
| 26 | |
| 27 | #include <linux/kernel.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/types.h> |
| 31 | #include <linux/delay.h> |
| 32 | #include <linux/proc_fs.h> |
| 33 | #include <linux/seq_file.h> |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 34 | #include <linux/interrupt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/io.h> |
| 36 | #include <acpi/acpi_bus.h> |
| 37 | #include <acpi/acpi_drivers.h> |
| 38 | #include <acpi/actypes.h> |
| 39 | |
| 40 | #define _COMPONENT ACPI_EC_COMPONENT |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 41 | ACPI_MODULE_NAME("acpi_ec") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #define ACPI_EC_COMPONENT 0x00100000 |
| 43 | #define ACPI_EC_CLASS "embedded_controller" |
| 44 | #define ACPI_EC_HID "PNP0C09" |
| 45 | #define ACPI_EC_DRIVER_NAME "ACPI Embedded Controller Driver" |
| 46 | #define ACPI_EC_DEVICE_NAME "Embedded Controller" |
| 47 | #define ACPI_EC_FILE_INFO "info" |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 48 | #undef PREFIX |
| 49 | #define PREFIX "ACPI: EC: " |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 50 | /* EC status register */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */ |
| 52 | #define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */ |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 53 | #define ACPI_EC_FLAG_BURST 0x10 /* burst mode */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 55 | /* EC commands */ |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 56 | enum ec_command { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 57 | ACPI_EC_COMMAND_READ = 0x80, |
| 58 | ACPI_EC_COMMAND_WRITE = 0x81, |
| 59 | ACPI_EC_BURST_ENABLE = 0x82, |
| 60 | ACPI_EC_BURST_DISABLE = 0x83, |
| 61 | ACPI_EC_COMMAND_QUERY = 0x84, |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 62 | }; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 63 | /* EC events */ |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 64 | enum ec_event { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 65 | ACPI_EC_EVENT_OBF_1 = 1, /* Output buffer full */ |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 66 | ACPI_EC_EVENT_IBF_0, /* Input buffer empty */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 67 | }; |
| 68 | |
Alexey Starikovskiy | 5c40641 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 69 | #define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 70 | #define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 71 | |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 72 | static enum ec_mode { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 73 | EC_INTR = 1, /* Output buffer full */ |
| 74 | EC_POLL, /* Input buffer empty */ |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 75 | } acpi_ec_mode = EC_INTR; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 76 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 77 | static int acpi_ec_remove(struct acpi_device *device, int type); |
| 78 | static int acpi_ec_start(struct acpi_device *device); |
| 79 | static int acpi_ec_stop(struct acpi_device *device, int type); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 80 | static int acpi_ec_add(struct acpi_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
| 82 | static struct acpi_driver acpi_ec_driver = { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 83 | .name = ACPI_EC_DRIVER_NAME, |
| 84 | .class = ACPI_EC_CLASS, |
| 85 | .ids = ACPI_EC_HID, |
| 86 | .ops = { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 87 | .add = acpi_ec_add, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 88 | .remove = acpi_ec_remove, |
| 89 | .start = acpi_ec_start, |
| 90 | .stop = acpi_ec_stop, |
| 91 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | }; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 93 | |
| 94 | /* If we find an EC via the ECDT, we need to keep a ptr to its context */ |
Adrian Bunk | a854e08 | 2006-12-19 12:56:12 -0800 | [diff] [blame] | 95 | static struct acpi_ec { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 96 | acpi_handle handle; |
| 97 | unsigned long uid; |
Alexey Starikovskiy | a86e277 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 98 | unsigned long gpe; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 99 | unsigned long command_addr; |
| 100 | unsigned long data_addr; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 101 | unsigned long global_lock; |
Alexey Starikovskiy | c787a85 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 102 | struct mutex lock; |
Alexey Starikovskiy | 5d0c288 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 103 | atomic_t query_pending; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 104 | atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */ |
| 105 | wait_queue_head_t wait; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 106 | } *ec_ecdt; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 107 | |
| 108 | /* External interfaces use first EC only, so remember */ |
| 109 | static struct acpi_device *first_ec; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | /* -------------------------------------------------------------------------- |
| 112 | Transaction Management |
| 113 | -------------------------------------------------------------------------- */ |
| 114 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 115 | static inline u8 acpi_ec_read_status(struct acpi_ec *ec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | { |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 117 | return inb(ec->command_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | } |
| 119 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 120 | static inline u8 acpi_ec_read_data(struct acpi_ec *ec) |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 121 | { |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 122 | return inb(ec->data_addr); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 123 | } |
| 124 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 125 | 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] | 126 | { |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 127 | outb(command, ec->command_addr); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 128 | } |
| 129 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 130 | 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] | 131 | { |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 132 | outb(data, ec->data_addr); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 133 | } |
| 134 | |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 135 | static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event) |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 136 | { |
Alexey Starikovskiy | bec5a1e | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 137 | u8 status = acpi_ec_read_status(ec); |
Alexey Starikovskiy | 78d0af3 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 138 | |
| 139 | if (event == ACPI_EC_EVENT_OBF_1) { |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 140 | if (status & ACPI_EC_FLAG_OBF) |
| 141 | return 1; |
Alexey Starikovskiy | 78d0af3 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 142 | } else if (event == ACPI_EC_EVENT_IBF_0) { |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 143 | if (!(status & ACPI_EC_FLAG_IBF)) |
| 144 | return 1; |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | return 0; |
| 148 | } |
| 149 | |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 150 | static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 151 | { |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 152 | if (acpi_ec_mode == EC_POLL) { |
Alexey Starikovskiy | 50c1e11 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 153 | unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); |
| 154 | while (time_before(jiffies, delay)) { |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 155 | if (acpi_ec_check_status(ec, event)) |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 156 | return 0; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 157 | } |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 158 | } else { |
| 159 | if (wait_event_timeout(ec->wait, |
| 160 | acpi_ec_check_status(ec, event), |
| 161 | msecs_to_jiffies(ACPI_EC_DELAY)) || |
| 162 | acpi_ec_check_status(ec, event)) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 163 | return 0; |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 164 | } else { |
| 165 | printk(KERN_ERR PREFIX "acpi_ec_wait timeout," |
| 166 | " status = %d, expect_event = %d\n", |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 167 | acpi_ec_read_status(ec), event); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 168 | } |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 169 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 170 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 171 | return -ETIME; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 172 | } |
| 173 | |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 174 | #ifdef ACPI_FUTURE_USAGE |
Luming Yu | 06a2a38 | 2005-09-27 00:43:00 -0400 | [diff] [blame] | 175 | /* |
| 176 | * Note: samsung nv5000 doesn't work with ec burst mode. |
| 177 | * http://bugzilla.kernel.org/show_bug.cgi?id=4980 |
| 178 | */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 179 | int acpi_ec_enter_burst_mode(struct acpi_ec *ec) |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 180 | { |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 181 | u8 tmp = 0; |
| 182 | u8 status = 0; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 183 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 184 | status = acpi_ec_read_status(ec); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 185 | if (status != -EINVAL && !(status & ACPI_EC_FLAG_BURST)) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 186 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 187 | if (status) |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 188 | goto end; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 189 | acpi_ec_write_cmd(ec, ACPI_EC_BURST_ENABLE); |
| 190 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1); |
| 191 | tmp = acpi_ec_read_data(ec); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 192 | if (tmp != 0x90) { /* Burst ACK byte */ |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 193 | return -EINVAL; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 194 | } |
Luming Yu | 668d74c | 2005-07-23 00:26:33 -0400 | [diff] [blame] | 195 | } |
| 196 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 197 | atomic_set(&ec->leaving_burst, 0); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 198 | return 0; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 199 | end: |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 200 | ACPI_EXCEPTION((AE_INFO, status, "EC wait, burst mode")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 201 | return -1; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 202 | } |
| 203 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 204 | int acpi_ec_leave_burst_mode(struct acpi_ec *ec) |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 205 | { |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 206 | u8 status = 0; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 207 | |
Luming Yu | 06a2a38 | 2005-09-27 00:43:00 -0400 | [diff] [blame] | 208 | status = acpi_ec_read_status(ec); |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 209 | if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 210 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 211 | if (status) |
Luming Yu | 06a2a38 | 2005-09-27 00:43:00 -0400 | [diff] [blame] | 212 | goto end; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 213 | acpi_ec_write_cmd(ec, ACPI_EC_BURST_DISABLE); |
| 214 | acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 215 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 216 | atomic_set(&ec->leaving_burst, 1); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 217 | return 0; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 218 | end: |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 219 | ACPI_EXCEPTION((AE_INFO, status, "EC leave burst mode")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 220 | return -1; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 221 | } |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 222 | #endif /* ACPI_FUTURE_USAGE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 224 | static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 225 | const u8 * wdata, unsigned wdata_len, |
| 226 | u8 * rdata, unsigned rdata_len) |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 227 | { |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 228 | int result = 0; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 229 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 230 | acpi_ec_write_cmd(ec, command); |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 231 | |
Alexey Starikovskiy | 78d0af3 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 232 | for (; wdata_len > 0; --wdata_len) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 233 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 234 | if (result) { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 235 | printk(KERN_ERR PREFIX |
| 236 | "write_cmd timeout, command = %d\n", command); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 237 | goto end; |
| 238 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 239 | acpi_ec_write_data(ec, *(wdata++)); |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 240 | } |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 241 | |
Alexey Starikovskiy | d91df1a | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 242 | if (!rdata_len) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 243 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 244 | if (result) { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 245 | printk(KERN_ERR PREFIX |
| 246 | "finish-write timeout, command = %d\n", command); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 247 | goto end; |
| 248 | } |
Alexey Starikovskiy | 5d0c288 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 249 | } else if (command == ACPI_EC_COMMAND_QUERY) { |
| 250 | atomic_set(&ec->query_pending, 0); |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 251 | } |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 252 | |
Alexey Starikovskiy | 78d0af3 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 253 | for (; rdata_len > 0; --rdata_len) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 254 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 255 | if (result) { |
| 256 | printk(KERN_ERR PREFIX "read timeout, command = %d\n", |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 257 | command); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 258 | goto end; |
| 259 | } |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 260 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 261 | *(rdata++) = acpi_ec_read_data(ec); |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 262 | } |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 263 | end: |
| 264 | return result; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 265 | } |
| 266 | |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 267 | static int acpi_ec_transaction(struct acpi_ec *ec, u8 command, |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 268 | const u8 * wdata, unsigned wdata_len, |
| 269 | u8 * rdata, unsigned rdata_len) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 270 | { |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 271 | int status; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 272 | u32 glk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 274 | if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 275 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 277 | if (rdata) |
| 278 | memset(rdata, 0, rdata_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Alexey Starikovskiy | 523953b | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 280 | mutex_lock(&ec->lock); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 281 | if (ec->global_lock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
Alexey Starikovskiy | c24e912 | 2007-02-15 23:16:18 +0300 | [diff] [blame^] | 283 | if (ACPI_FAILURE(status)) { |
| 284 | mutex_unlock(&ec->lock); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 285 | return -ENODEV; |
Alexey Starikovskiy | c24e912 | 2007-02-15 23:16:18 +0300 | [diff] [blame^] | 286 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 288 | |
Alexey Starikovskiy | 5d57a6a | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 289 | /* Make sure GPE is enabled before doing transaction */ |
Alexey Starikovskiy | a86e277 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 290 | acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); |
Alexey Starikovskiy | 5d57a6a | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 291 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 292 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 293 | if (status) { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 294 | printk(KERN_DEBUG PREFIX |
| 295 | "input buffer is not empty, aborting transaction\n"); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 296 | goto end; |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 297 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 299 | status = acpi_ec_transaction_unlocked(ec, command, |
| 300 | wdata, wdata_len, |
| 301 | rdata, rdata_len); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 302 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 303 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 305 | if (ec->global_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | acpi_release_global_lock(glk); |
Alexey Starikovskiy | 523953b | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 307 | mutex_unlock(&ec->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 309 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | } |
| 311 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 312 | 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] | 313 | { |
| 314 | int result; |
| 315 | u8 d; |
| 316 | |
| 317 | result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ, |
| 318 | &address, 1, &d, 1); |
| 319 | *data = d; |
| 320 | return result; |
| 321 | } |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 322 | |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 323 | static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data) |
| 324 | { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 325 | u8 wdata[2] = { address, data }; |
| 326 | return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE, |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 327 | wdata, 2, NULL, 0); |
| 328 | } |
| 329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | /* |
| 331 | * Externally callable EC access functions. For now, assume 1 EC only |
| 332 | */ |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 333 | int ec_read(u8 addr, u8 * val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 335 | struct acpi_ec *ec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | int err; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 337 | u8 temp_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
| 339 | if (!first_ec) |
| 340 | return -ENODEV; |
| 341 | |
| 342 | ec = acpi_driver_data(first_ec); |
| 343 | |
| 344 | err = acpi_ec_read(ec, addr, &temp_data); |
| 345 | |
| 346 | if (!err) { |
| 347 | *val = temp_data; |
| 348 | return 0; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 349 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | return err; |
| 351 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | EXPORT_SYMBOL(ec_read); |
| 354 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 355 | int ec_write(u8 addr, u8 val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 357 | struct acpi_ec *ec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | int err; |
| 359 | |
| 360 | if (!first_ec) |
| 361 | return -ENODEV; |
| 362 | |
| 363 | ec = acpi_driver_data(first_ec); |
| 364 | |
| 365 | err = acpi_ec_write(ec, addr, val); |
| 366 | |
| 367 | return err; |
| 368 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 369 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | EXPORT_SYMBOL(ec_write); |
| 371 | |
Randy Dunlap | 616362d | 2006-10-27 01:47:34 -0400 | [diff] [blame] | 372 | int ec_transaction(u8 command, |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 373 | const u8 * wdata, unsigned wdata_len, |
| 374 | u8 * rdata, unsigned rdata_len) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 375 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 376 | struct acpi_ec *ec; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 377 | |
| 378 | if (!first_ec) |
| 379 | return -ENODEV; |
| 380 | |
| 381 | ec = acpi_driver_data(first_ec); |
| 382 | |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 383 | return acpi_ec_transaction(ec, command, wdata, |
| 384 | wdata_len, rdata, rdata_len); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 385 | } |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 386 | |
Lennart Poettering | ab9e43c | 2006-10-03 22:49:00 -0400 | [diff] [blame] | 387 | EXPORT_SYMBOL(ec_transaction); |
| 388 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 389 | static int acpi_ec_query(struct acpi_ec *ec, u8 * data) |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 390 | { |
| 391 | int result; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 392 | u8 d; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 393 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 394 | if (!ec || !data) |
| 395 | return -EINVAL; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 396 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 397 | /* |
| 398 | * Query the EC to find out which _Qxx method we need to evaluate. |
| 399 | * Note that successful completion of the query causes the ACPI_EC_SCI |
| 400 | * bit to be cleared (and thus clearing the interrupt source). |
| 401 | */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 402 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 403 | result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1); |
| 404 | if (result) |
| 405 | return result; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 406 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 407 | if (!d) |
| 408 | return -ENODATA; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 409 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 410 | *data = d; |
| 411 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | } |
| 413 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | /* -------------------------------------------------------------------------- |
| 415 | Event Management |
| 416 | -------------------------------------------------------------------------- */ |
| 417 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 418 | static void acpi_ec_gpe_query(void *ec_cxt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 420 | struct acpi_ec *ec = (struct acpi_ec *)ec_cxt; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 421 | u8 value = 0; |
Alexey Starikovskiy | 5d0c288 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 422 | char object_name[8]; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 423 | |
Alexey Starikovskiy | 5d0c288 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 424 | if (!ec || acpi_ec_query(ec, &value)) |
Alexey Starikovskiy | e41334c | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 425 | return; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 426 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 427 | snprintf(object_name, 8, "_Q%2.2X", value); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 428 | |
Guillaume Chazarain | c6e1919 | 2006-12-24 22:19:02 +0100 | [diff] [blame] | 429 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s", object_name)); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 430 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 431 | acpi_evaluate_object(ec->handle, object_name, NULL, NULL); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 432 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 434 | static u32 acpi_ec_gpe_handler(void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 436 | acpi_status status = AE_OK; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 437 | u8 value; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 438 | struct acpi_ec *ec = (struct acpi_ec *)data; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 439 | |
Denis M. Sadykov | 8e0341b | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 440 | if (acpi_ec_mode == EC_INTR) { |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 441 | wake_up(&ec->wait); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 442 | } |
| 443 | |
Alexey Starikovskiy | bec5a1e | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 444 | value = acpi_ec_read_status(ec); |
Alexey Starikovskiy | 5d0c288 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 445 | if ((value & ACPI_EC_FLAG_SCI) && !atomic_read(&ec->query_pending)) { |
| 446 | atomic_set(&ec->query_pending, 1); |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 447 | status = |
| 448 | acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, |
| 449 | ec); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 450 | } |
Alexey Starikovskiy | e41334c | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 451 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 452 | return status == AE_OK ? |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 453 | ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | /* -------------------------------------------------------------------------- |
| 457 | Address Space Management |
| 458 | -------------------------------------------------------------------------- */ |
| 459 | |
| 460 | static acpi_status |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 461 | acpi_ec_space_setup(acpi_handle region_handle, |
| 462 | u32 function, void *handler_context, void **return_context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | { |
| 464 | /* |
| 465 | * The EC object is in the handler context and is needed |
| 466 | * when calling the acpi_ec_space_handler. |
| 467 | */ |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 468 | *return_context = (function != ACPI_REGION_DEACTIVATE) ? |
| 469 | handler_context : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | |
| 471 | return AE_OK; |
| 472 | } |
| 473 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | static acpi_status |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 475 | acpi_ec_space_handler(u32 function, |
| 476 | acpi_physical_address address, |
| 477 | u32 bit_width, |
| 478 | acpi_integer * value, |
| 479 | void *handler_context, void *region_context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 481 | int result = 0; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 482 | struct acpi_ec *ec = NULL; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 483 | u64 temp = *value; |
| 484 | acpi_integer f_v = 0; |
| 485 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | if ((address > 0xFF) || !value || !handler_context) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 488 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 490 | if (bit_width != 8 && acpi_strict) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 491 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | } |
| 493 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 494 | ec = (struct acpi_ec *)handler_context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 496 | next_byte: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | switch (function) { |
| 498 | case ACPI_READ: |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 499 | temp = 0; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 500 | result = acpi_ec_read(ec, (u8) address, (u8 *) & temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | break; |
| 502 | case ACPI_WRITE: |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 503 | result = acpi_ec_write(ec, (u8) address, (u8) temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | break; |
| 505 | default: |
| 506 | result = -EINVAL; |
| 507 | goto out; |
| 508 | break; |
| 509 | } |
| 510 | |
| 511 | bit_width -= 8; |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 512 | if (bit_width) { |
| 513 | if (function == ACPI_READ) |
| 514 | f_v |= temp << 8 * i; |
| 515 | if (function == ACPI_WRITE) |
| 516 | temp >>= 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | i++; |
Andrew Morton | 83ea744 | 2005-03-30 22:12:13 -0500 | [diff] [blame] | 518 | address++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | goto next_byte; |
| 520 | } |
| 521 | |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 522 | if (function == ACPI_READ) { |
| 523 | f_v |= temp << 8 * i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | *value = f_v; |
| 525 | } |
| 526 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 527 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | switch (result) { |
| 529 | case -EINVAL: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 530 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | break; |
| 532 | case -ENODEV: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 533 | return AE_NOT_FOUND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | break; |
| 535 | case -ETIME: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 536 | return AE_TIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | break; |
| 538 | default: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 539 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | } |
| 542 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | /* -------------------------------------------------------------------------- |
| 544 | FS Interface (/proc) |
| 545 | -------------------------------------------------------------------------- */ |
| 546 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 547 | static struct proc_dir_entry *acpi_ec_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 549 | static int acpi_ec_read_info(struct seq_file *seq, void *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 551 | struct acpi_ec *ec = (struct acpi_ec *)seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | if (!ec) |
| 554 | goto end; |
| 555 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 556 | seq_printf(seq, "gpe: 0x%02x\n", (u32) ec->gpe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | seq_printf(seq, "ports: 0x%02x, 0x%02x\n", |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 558 | (u32) ec->command_addr, (u32) ec->data_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | seq_printf(seq, "use global lock: %s\n", |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 560 | ec->global_lock ? "yes" : "no"); |
Alexey Starikovskiy | a86e277 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 561 | acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 563 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 564 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | } |
| 566 | |
| 567 | static int acpi_ec_info_open_fs(struct inode *inode, struct file *file) |
| 568 | { |
| 569 | return single_open(file, acpi_ec_read_info, PDE(inode)->data); |
| 570 | } |
| 571 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 572 | static struct file_operations acpi_ec_info_ops = { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 573 | .open = acpi_ec_info_open_fs, |
| 574 | .read = seq_read, |
| 575 | .llseek = seq_lseek, |
| 576 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | .owner = THIS_MODULE, |
| 578 | }; |
| 579 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 580 | static int acpi_ec_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 582 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | if (!acpi_device_dir(device)) { |
| 585 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 586 | acpi_ec_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 588 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | } |
| 590 | |
| 591 | entry = create_proc_entry(ACPI_EC_FILE_INFO, S_IRUGO, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 592 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 594 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | else { |
| 596 | entry->proc_fops = &acpi_ec_info_ops; |
| 597 | entry->data = acpi_driver_data(device); |
| 598 | entry->owner = THIS_MODULE; |
| 599 | } |
| 600 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 601 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | } |
| 603 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 604 | static int acpi_ec_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
| 607 | if (acpi_device_dir(device)) { |
| 608 | remove_proc_entry(ACPI_EC_FILE_INFO, acpi_device_dir(device)); |
| 609 | remove_proc_entry(acpi_device_bid(device), acpi_ec_dir); |
| 610 | acpi_device_dir(device) = NULL; |
| 611 | } |
| 612 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 613 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | } |
| 615 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | /* -------------------------------------------------------------------------- |
| 617 | Driver Interface |
| 618 | -------------------------------------------------------------------------- */ |
| 619 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 620 | static int acpi_ec_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 622 | int result = 0; |
| 623 | acpi_status status = AE_OK; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 624 | struct acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 627 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 629 | ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | if (!ec) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 631 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 633 | ec->handle = device->handle; |
| 634 | ec->uid = -1; |
Alexey Starikovskiy | c787a85 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 635 | mutex_init(&ec->lock); |
Alexey Starikovskiy | 5d0c288 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 636 | atomic_set(&ec->query_pending, 0); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 637 | if (acpi_ec_mode == EC_INTR) { |
| 638 | atomic_set(&ec->leaving_burst, 1); |
| 639 | init_waitqueue_head(&ec->wait); |
| 640 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); |
| 642 | strcpy(acpi_device_class(device), ACPI_EC_CLASS); |
| 643 | acpi_driver_data(device) = ec; |
| 644 | |
| 645 | /* Use the global lock for all EC transactions? */ |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 646 | acpi_evaluate_integer(ec->handle, "_GLK", NULL, &ec->global_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | |
Jiri Slaby | ff2fc3e | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 648 | /* XXX we don't test uids, because on some boxes ecdt uid = 0, see: |
| 649 | http://bugzilla.kernel.org/show_bug.cgi?id=6111 */ |
| 650 | if (ec_ecdt) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 652 | ACPI_ADR_SPACE_EC, |
| 653 | &acpi_ec_space_handler); |
| 654 | |
Alexey Starikovskiy | a86e277 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 655 | acpi_remove_gpe_handler(NULL, ec_ecdt->gpe, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 656 | &acpi_ec_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
| 658 | kfree(ec_ecdt); |
| 659 | } |
| 660 | |
| 661 | /* Get GPE bit assignment (EC events). */ |
| 662 | /* TODO: Add support for _GPE returning a package */ |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 663 | status = acpi_evaluate_integer(ec->handle, "_GPE", NULL, &ec->gpe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | if (ACPI_FAILURE(status)) { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 665 | ACPI_EXCEPTION((AE_INFO, status, |
| 666 | "Obtaining GPE bit assignment")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | result = -ENODEV; |
| 668 | goto end; |
| 669 | } |
| 670 | |
| 671 | result = acpi_ec_add_fs(device); |
| 672 | if (result) |
| 673 | goto end; |
| 674 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 675 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s [%s] (gpe %d) interrupt mode.", |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 676 | acpi_device_name(device), acpi_device_bid(device), |
| 677 | (u32) ec->gpe)); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 678 | |
| 679 | if (!first_ec) |
| 680 | first_ec = device; |
| 681 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 682 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | if (result) |
| 684 | kfree(ec); |
| 685 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 686 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | } |
| 688 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 689 | static int acpi_ec_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 691 | struct acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 694 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | |
| 696 | ec = acpi_driver_data(device); |
| 697 | |
| 698 | acpi_ec_remove_fs(device); |
| 699 | |
| 700 | kfree(ec); |
| 701 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 702 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | } |
| 704 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | static acpi_status |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 706 | acpi_ec_io_ports(struct acpi_resource *resource, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 708 | struct acpi_ec *ec = (struct acpi_ec *)context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 710 | if (resource->type != ACPI_RESOURCE_TYPE_IO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | return AE_OK; |
| 712 | } |
| 713 | |
| 714 | /* |
| 715 | * The first address region returned is the data port, and |
| 716 | * the second address region returned is the status/command |
| 717 | * port. |
| 718 | */ |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 719 | if (ec->data_addr == 0) { |
| 720 | ec->data_addr = resource->data.io.minimum; |
| 721 | } else if (ec->command_addr == 0) { |
| 722 | ec->command_addr = resource->data.io.minimum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | } else { |
| 724 | return AE_CTRL_TERMINATE; |
| 725 | } |
| 726 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | return AE_OK; |
| 728 | } |
| 729 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 730 | static int acpi_ec_start(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 732 | acpi_status status = AE_OK; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 733 | struct acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 736 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | |
| 738 | ec = acpi_driver_data(device); |
| 739 | |
| 740 | if (!ec) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 741 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | |
| 743 | /* |
| 744 | * Get I/O port addresses. Convert to GAS format. |
| 745 | */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 746 | status = acpi_walk_resources(ec->handle, METHOD_NAME__CRS, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 747 | acpi_ec_io_ports, ec); |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 748 | if (ACPI_FAILURE(status) || ec->command_addr == 0) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 749 | ACPI_EXCEPTION((AE_INFO, status, |
| 750 | "Error getting I/O port addresses")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 751 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | } |
| 753 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 754 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02lx, ports=0x%2lx,0x%2lx", |
Alexey Starikovskiy | a86e277 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 755 | ec->gpe, ec->command_addr, ec->data_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | |
| 757 | /* |
| 758 | * Install GPE handler |
| 759 | */ |
Alexey Starikovskiy | a86e277 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 760 | status = acpi_install_gpe_handler(NULL, ec->gpe, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 761 | ACPI_GPE_EDGE_TRIGGERED, |
| 762 | &acpi_ec_gpe_handler, ec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | if (ACPI_FAILURE(status)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 764 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | } |
Alexey Starikovskiy | a86e277 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 766 | acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); |
| 767 | acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 769 | status = acpi_install_address_space_handler(ec->handle, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 770 | ACPI_ADR_SPACE_EC, |
| 771 | &acpi_ec_space_handler, |
| 772 | &acpi_ec_space_setup, ec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | if (ACPI_FAILURE(status)) { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 774 | acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 775 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | } |
| 777 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 778 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | } |
| 780 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 781 | static int acpi_ec_stop(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 783 | acpi_status status = AE_OK; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 784 | struct acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 787 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | |
| 789 | ec = acpi_driver_data(device); |
| 790 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 791 | status = acpi_remove_address_space_handler(ec->handle, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 792 | ACPI_ADR_SPACE_EC, |
| 793 | &acpi_ec_space_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 795 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 797 | status = acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 799 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 801 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | } |
| 803 | |
| 804 | static acpi_status __init |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 805 | acpi_fake_ecdt_callback(acpi_handle handle, |
| 806 | u32 Level, void *context, void **retval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 808 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | |
Alexey Starikovskiy | c787a85 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 810 | mutex_init(&ec_ecdt->lock); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 811 | if (acpi_ec_mode == EC_INTR) { |
| 812 | init_waitqueue_head(&ec_ecdt->wait); |
| 813 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 815 | acpi_ec_io_ports, ec_ecdt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | if (ACPI_FAILURE(status)) |
| 817 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 819 | ec_ecdt->uid = -1; |
| 820 | acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 822 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->gpe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | if (ACPI_FAILURE(status)) |
| 824 | return status; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 825 | ec_ecdt->global_lock = TRUE; |
| 826 | ec_ecdt->handle = handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 828 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02lx, ports=0x%2lx, 0x%2lx", |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 829 | ec_ecdt->gpe, ec_ecdt->command_addr, |
| 830 | ec_ecdt->data_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | |
| 832 | return AE_CTRL_TERMINATE; |
| 833 | } |
| 834 | |
| 835 | /* |
| 836 | * Some BIOS (such as some from Gateway laptops) access EC region very early |
| 837 | * such as in BAT0._INI or EC._INI before an EC device is found and |
| 838 | * do not provide an ECDT. According to ACPI spec, ECDT isn't mandatorily |
| 839 | * required, but if EC regison is accessed early, it is required. |
| 840 | * The routine tries to workaround the BIOS bug by pre-scan EC device |
| 841 | * It assumes that _CRS, _HID, _GPE, _UID methods of EC don't touch any |
| 842 | * op region (since _REG isn't invoked yet). The assumption is true for |
| 843 | * all systems found. |
| 844 | */ |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 845 | static int __init acpi_ec_fake_ecdt(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 847 | acpi_status status; |
| 848 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 850 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Try to make an fake ECDT")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 852 | ec_ecdt = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | if (!ec_ecdt) { |
| 854 | ret = -ENOMEM; |
| 855 | goto error; |
| 856 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 858 | status = acpi_get_devices(ACPI_EC_HID, |
| 859 | acpi_fake_ecdt_callback, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | if (ACPI_FAILURE(status)) { |
| 861 | kfree(ec_ecdt); |
| 862 | ec_ecdt = NULL; |
| 863 | ret = -ENODEV; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 864 | ACPI_EXCEPTION((AE_INFO, status, "Can't make an fake ECDT")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | goto error; |
| 866 | } |
| 867 | return 0; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 868 | error: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | return ret; |
| 870 | } |
| 871 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 872 | static int __init acpi_ec_get_real_ecdt(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 874 | acpi_status status; |
| 875 | struct acpi_table_ecdt *ecdt_ptr; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 876 | |
Alexey Starikovskiy | 15a58ed | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 877 | status = acpi_get_table(ACPI_SIG_ECDT, 1, |
| 878 | (struct acpi_table_header **)&ecdt_ptr); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 879 | if (ACPI_FAILURE(status)) |
| 880 | return -ENODEV; |
| 881 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 882 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found ECDT")); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 883 | |
| 884 | /* |
| 885 | * Generate a temporary ec context to use until the namespace is scanned |
| 886 | */ |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 887 | ec_ecdt = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 888 | if (!ec_ecdt) |
| 889 | return -ENOMEM; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 890 | |
Alexey Starikovskiy | c787a85 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 891 | mutex_init(&ec_ecdt->lock); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 892 | if (acpi_ec_mode == EC_INTR) { |
| 893 | init_waitqueue_head(&ec_ecdt->wait); |
| 894 | } |
Alexey Starikovskiy | ad363f8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 895 | ec_ecdt->command_addr = ecdt_ptr->control.address; |
| 896 | ec_ecdt->data_addr = ecdt_ptr->data.address; |
| 897 | ec_ecdt->gpe = ecdt_ptr->gpe; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 898 | /* use the GL just to be safe */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 899 | ec_ecdt->global_lock = TRUE; |
| 900 | ec_ecdt->uid = ecdt_ptr->uid; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 901 | |
Alexey Starikovskiy | ad363f8 | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 902 | status = acpi_get_handle(NULL, ecdt_ptr->id, &ec_ecdt->handle); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 903 | if (ACPI_FAILURE(status)) { |
| 904 | goto error; |
| 905 | } |
| 906 | |
| 907 | return 0; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 908 | error: |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 909 | ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | kfree(ec_ecdt); |
| 911 | ec_ecdt = NULL; |
| 912 | |
| 913 | return -ENODEV; |
| 914 | } |
| 915 | |
| 916 | static int __initdata acpi_fake_ecdt_enabled; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 917 | int __init acpi_ec_ecdt_probe(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 919 | acpi_status status; |
| 920 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
| 922 | ret = acpi_ec_get_real_ecdt(); |
| 923 | /* Try to make a fake ECDT */ |
| 924 | if (ret && acpi_fake_ecdt_enabled) { |
| 925 | ret = acpi_ec_fake_ecdt(); |
| 926 | } |
| 927 | |
| 928 | if (ret) |
| 929 | return 0; |
| 930 | |
| 931 | /* |
| 932 | * Install GPE handler |
| 933 | */ |
Alexey Starikovskiy | a86e277 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 934 | status = acpi_install_gpe_handler(NULL, ec_ecdt->gpe, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 935 | ACPI_GPE_EDGE_TRIGGERED, |
| 936 | &acpi_ec_gpe_handler, ec_ecdt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | if (ACPI_FAILURE(status)) { |
| 938 | goto error; |
| 939 | } |
Alexey Starikovskiy | a86e277 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 940 | acpi_set_gpe_type(NULL, ec_ecdt->gpe, ACPI_GPE_TYPE_RUNTIME); |
| 941 | acpi_enable_gpe(NULL, ec_ecdt->gpe, ACPI_NOT_ISR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 943 | status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT, |
| 944 | ACPI_ADR_SPACE_EC, |
| 945 | &acpi_ec_space_handler, |
| 946 | &acpi_ec_space_setup, |
| 947 | ec_ecdt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | if (ACPI_FAILURE(status)) { |
Alexey Starikovskiy | a86e277 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 949 | acpi_remove_gpe_handler(NULL, ec_ecdt->gpe, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 950 | &acpi_ec_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | goto error; |
| 952 | } |
| 953 | |
| 954 | return 0; |
| 955 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 956 | error: |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 957 | ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | kfree(ec_ecdt); |
| 959 | ec_ecdt = NULL; |
| 960 | |
| 961 | return -ENODEV; |
| 962 | } |
| 963 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 964 | static int __init acpi_ec_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 966 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 969 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | |
| 971 | acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir); |
| 972 | if (!acpi_ec_dir) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 973 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | |
| 975 | /* Now register the driver for the EC */ |
| 976 | result = acpi_bus_register_driver(&acpi_ec_driver); |
| 977 | if (result < 0) { |
| 978 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 979 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | } |
| 981 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 982 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | } |
| 984 | |
| 985 | subsys_initcall(acpi_ec_init); |
| 986 | |
| 987 | /* EC driver currently not unloadable */ |
| 988 | #if 0 |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 989 | static void __exit acpi_ec_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | |
| 992 | acpi_bus_unregister_driver(&acpi_ec_driver); |
| 993 | |
| 994 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); |
| 995 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 996 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 998 | #endif /* 0 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | |
| 1000 | static int __init acpi_fake_ecdt_setup(char *str) |
| 1001 | { |
| 1002 | acpi_fake_ecdt_enabled = 1; |
OGAWA Hirofumi | 9b41046 | 2006-03-31 02:30:33 -0800 | [diff] [blame] | 1003 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | } |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1005 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | __setup("acpi_fake_ecdt", acpi_fake_ecdt_setup); |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 1007 | static int __init acpi_ec_set_intr_mode(char *str) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1008 | { |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 1009 | int intr; |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1010 | |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 1011 | if (!get_option(&str, &intr)) |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1012 | return 0; |
| 1013 | |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 1014 | if (intr) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1015 | acpi_ec_mode = EC_INTR; |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1016 | } else { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1017 | acpi_ec_mode = EC_POLL; |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1018 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1019 | acpi_ec_driver.ops.add = acpi_ec_add; |
Len Brown | 723fe2c | 2007-01-06 00:02:07 -0500 | [diff] [blame] | 1020 | printk(KERN_NOTICE PREFIX "%s mode.\n", |
| 1021 | intr ? "interrupt" : "polling"); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1022 | |
OGAWA Hirofumi | 9b41046 | 2006-03-31 02:30:33 -0800 | [diff] [blame] | 1023 | return 1; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1024 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1025 | |
Len Brown | 53f11d4 | 2005-12-05 16:46:36 -0500 | [diff] [blame] | 1026 | __setup("ec_intr=", acpi_ec_set_intr_mode); |