Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 2 | * ec.c - ACPI Embedded Controller Driver (v2.0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 4 | * Copyright (C) 2006, 2007 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> |
| 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 | |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/init.h> |
| 32 | #include <linux/types.h> |
| 33 | #include <linux/delay.h> |
| 34 | #include <linux/proc_fs.h> |
| 35 | #include <linux/seq_file.h> |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 36 | #include <linux/interrupt.h> |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 37 | #include <linux/list.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <asm/io.h> |
| 39 | #include <acpi/acpi_bus.h> |
| 40 | #include <acpi/acpi_drivers.h> |
| 41 | #include <acpi/actypes.h> |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #define ACPI_EC_CLASS "embedded_controller" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #define ACPI_EC_DEVICE_NAME "Embedded Controller" |
| 45 | #define ACPI_EC_FILE_INFO "info" |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 46 | |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 47 | #undef PREFIX |
| 48 | #define PREFIX "ACPI: EC: " |
Alexey Starikovskiy | 4350933 | 2007-05-29 16:42:57 +0400 | [diff] [blame] | 49 | |
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 */ |
Alexey Starikovskiy | 4350933 | 2007-05-29 16:42:57 +0400 | [diff] [blame] | 55 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 56 | /* EC commands */ |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 57 | enum ec_command { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 58 | ACPI_EC_COMMAND_READ = 0x80, |
| 59 | ACPI_EC_COMMAND_WRITE = 0x81, |
| 60 | ACPI_EC_BURST_ENABLE = 0x82, |
| 61 | ACPI_EC_BURST_DISABLE = 0x83, |
| 62 | ACPI_EC_COMMAND_QUERY = 0x84, |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 63 | }; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 64 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 65 | /* EC events */ |
Alexey Starikovskiy | 3261ff4 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 66 | enum ec_event { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 67 | ACPI_EC_EVENT_OBF_1 = 1, /* Output buffer full */ |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 68 | ACPI_EC_EVENT_IBF_0, /* Input buffer empty */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 69 | }; |
| 70 | |
Alexey Starikovskiy | 5c40641 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 71 | #define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 72 | #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] | 73 | |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 74 | enum { |
| 75 | EC_FLAGS_WAIT_GPE = 0, /* Don't check status until GPE arrives */ |
| 76 | EC_FLAGS_QUERY_PENDING, /* Query is pending */ |
Alexey Starikovskiy | 7843932 | 2007-10-22 14:18:43 +0400 | [diff] [blame] | 77 | EC_FLAGS_GPE_MODE, /* Expect GPE to be sent for status change */ |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 78 | }; |
| 79 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 80 | static int acpi_ec_remove(struct acpi_device *device, int type); |
| 81 | static int acpi_ec_start(struct acpi_device *device); |
| 82 | static int acpi_ec_stop(struct acpi_device *device, int type); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 83 | static int acpi_ec_add(struct acpi_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 85 | static const struct acpi_device_id ec_device_ids[] = { |
| 86 | {"PNP0C09", 0}, |
| 87 | {"", 0}, |
| 88 | }; |
| 89 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | static struct acpi_driver acpi_ec_driver = { |
Len Brown | c2b6705 | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 91 | .name = "ec", |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 92 | .class = ACPI_EC_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 93 | .ids = ec_device_ids, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 94 | .ops = { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 95 | .add = acpi_ec_add, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 96 | .remove = acpi_ec_remove, |
| 97 | .start = acpi_ec_start, |
| 98 | .stop = acpi_ec_stop, |
| 99 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | }; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 101 | |
| 102 | /* 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] | 103 | /* External interfaces use first EC only, so remember */ |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 104 | typedef int (*acpi_ec_query_func) (void *data); |
| 105 | |
| 106 | struct acpi_ec_query_handler { |
| 107 | struct list_head node; |
| 108 | acpi_ec_query_func func; |
| 109 | acpi_handle handle; |
| 110 | void *data; |
| 111 | u8 query_bit; |
| 112 | }; |
| 113 | |
Adrian Bunk | a854e08 | 2006-12-19 12:56:12 -0800 | [diff] [blame] | 114 | static struct acpi_ec { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 115 | acpi_handle handle; |
Alexey Starikovskiy | a86e277 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 116 | unsigned long gpe; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 117 | unsigned long command_addr; |
| 118 | unsigned long data_addr; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 119 | unsigned long global_lock; |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 120 | unsigned long flags; |
Alexey Starikovskiy | c787a85 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 121 | struct mutex lock; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 122 | wait_queue_head_t wait; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 123 | struct list_head list; |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 124 | u8 handlers_installed; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 125 | } *boot_ec, *first_ec; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | /* -------------------------------------------------------------------------- |
| 128 | Transaction Management |
| 129 | -------------------------------------------------------------------------- */ |
| 130 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 131 | static inline u8 acpi_ec_read_status(struct acpi_ec *ec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | { |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 133 | return inb(ec->command_addr); |
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 | { |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 138 | return inb(ec->data_addr); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 139 | } |
| 140 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 141 | 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] | 142 | { |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 143 | outb(command, ec->command_addr); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 144 | } |
| 145 | |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 146 | 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] | 147 | { |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 148 | outb(data, ec->data_addr); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 149 | } |
| 150 | |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 151 | 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] | 152 | { |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 153 | if (test_bit(EC_FLAGS_WAIT_GPE, &ec->flags)) |
Alexey Starikovskiy | 9e19721 | 2007-03-07 18:29:35 -0500 | [diff] [blame] | 154 | return 0; |
Alexey Starikovskiy | 78d0af3 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 155 | if (event == ACPI_EC_EVENT_OBF_1) { |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 156 | if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_OBF) |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 157 | return 1; |
Alexey Starikovskiy | 78d0af3 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 158 | } else if (event == ACPI_EC_EVENT_IBF_0) { |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 159 | if (!(acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF)) |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 160 | return 1; |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 166 | static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 167 | { |
Alexey Starikovskiy | 7843932 | 2007-10-22 14:18:43 +0400 | [diff] [blame] | 168 | if (likely(test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) && |
| 169 | likely(!force_poll)) { |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 170 | if (wait_event_timeout(ec->wait, acpi_ec_check_status(ec, event), |
| 171 | msecs_to_jiffies(ACPI_EC_DELAY))) |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 172 | return 0; |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 173 | clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); |
| 174 | if (acpi_ec_check_status(ec, event)) { |
Alexey Starikovskiy | 7843932 | 2007-10-22 14:18:43 +0400 | [diff] [blame] | 175 | clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 176 | return 0; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 177 | } |
Alexey Starikovskiy | 7843932 | 2007-10-22 14:18:43 +0400 | [diff] [blame] | 178 | } else { |
| 179 | unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); |
| 180 | clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); |
| 181 | while (time_before(jiffies, delay)) { |
| 182 | if (acpi_ec_check_status(ec, event)) |
| 183 | return 0; |
| 184 | } |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 185 | } |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 186 | printk(KERN_ERR PREFIX "acpi_ec_wait timeout," |
| 187 | " status = %d, expect_event = %d\n", |
| 188 | acpi_ec_read_status(ec), event); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 189 | return -ETIME; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 190 | } |
| 191 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 192 | static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 193 | const u8 * wdata, unsigned wdata_len, |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 194 | u8 * rdata, unsigned rdata_len, |
| 195 | int force_poll) |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 196 | { |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 197 | int result = 0; |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 198 | set_bit(EC_FLAGS_WAIT_GPE, &ec->flags); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 199 | acpi_ec_write_cmd(ec, command); |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 200 | |
Alexey Starikovskiy | 78d0af3 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 201 | for (; wdata_len > 0; --wdata_len) { |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 202 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, force_poll); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 203 | if (result) { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 204 | printk(KERN_ERR PREFIX |
| 205 | "write_cmd timeout, command = %d\n", command); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 206 | goto end; |
| 207 | } |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 208 | set_bit(EC_FLAGS_WAIT_GPE, &ec->flags); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 209 | acpi_ec_write_data(ec, *(wdata++)); |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 210 | } |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 211 | |
Alexey Starikovskiy | d91df1a | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 212 | if (!rdata_len) { |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 213 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, force_poll); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 214 | if (result) { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 215 | printk(KERN_ERR PREFIX |
| 216 | "finish-write timeout, command = %d\n", command); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 217 | goto end; |
| 218 | } |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 219 | } else if (command == ACPI_EC_COMMAND_QUERY) |
| 220 | clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 221 | |
Alexey Starikovskiy | 78d0af3 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 222 | for (; rdata_len > 0; --rdata_len) { |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 223 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, force_poll); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 224 | if (result) { |
| 225 | printk(KERN_ERR PREFIX "read timeout, command = %d\n", |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 226 | command); |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 227 | goto end; |
| 228 | } |
Alexey Starikovskiy | 0c5d31f | 2007-10-22 14:18:36 +0400 | [diff] [blame] | 229 | /* Don't expect GPE after last read */ |
| 230 | if (rdata_len > 1) |
| 231 | set_bit(EC_FLAGS_WAIT_GPE, &ec->flags); |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 232 | *(rdata++) = acpi_ec_read_data(ec); |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 233 | } |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 234 | end: |
| 235 | return result; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 236 | } |
| 237 | |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 238 | static int acpi_ec_transaction(struct acpi_ec *ec, u8 command, |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 239 | const u8 * wdata, unsigned wdata_len, |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 240 | u8 * rdata, unsigned rdata_len, |
| 241 | int force_poll) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 242 | { |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 243 | int status; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 244 | u32 glk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 246 | if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 247 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 249 | if (rdata) |
| 250 | memset(rdata, 0, rdata_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | |
Alexey Starikovskiy | 523953b | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 252 | mutex_lock(&ec->lock); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 253 | if (ec->global_lock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
Alexey Starikovskiy | c24e912 | 2007-02-15 23:16:18 +0300 | [diff] [blame] | 255 | if (ACPI_FAILURE(status)) { |
| 256 | mutex_unlock(&ec->lock); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 257 | return -ENODEV; |
Alexey Starikovskiy | c24e912 | 2007-02-15 23:16:18 +0300 | [diff] [blame] | 258 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | } |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 260 | |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 261 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, 0); |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 262 | if (status) { |
Alexey Starikovskiy | 4350933 | 2007-05-29 16:42:57 +0400 | [diff] [blame] | 263 | printk(KERN_ERR PREFIX |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 264 | "input buffer is not empty, aborting transaction\n"); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 265 | goto end; |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 266 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 268 | status = acpi_ec_transaction_unlocked(ec, command, |
| 269 | wdata, wdata_len, |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 270 | rdata, rdata_len, |
| 271 | force_poll); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 272 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 273 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 275 | if (ec->global_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | acpi_release_global_lock(glk); |
Alexey Starikovskiy | 523953b | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 277 | mutex_unlock(&ec->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 279 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
| 281 | |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 282 | /* |
| 283 | * Note: samsung nv5000 doesn't work with ec burst mode. |
| 284 | * http://bugzilla.kernel.org/show_bug.cgi?id=4980 |
| 285 | */ |
| 286 | int acpi_ec_burst_enable(struct acpi_ec *ec) |
| 287 | { |
| 288 | u8 d; |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 289 | return acpi_ec_transaction(ec, ACPI_EC_BURST_ENABLE, NULL, 0, &d, 1, 0); |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 290 | } |
| 291 | |
| 292 | int acpi_ec_burst_disable(struct acpi_ec *ec) |
| 293 | { |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 294 | return acpi_ec_transaction(ec, ACPI_EC_BURST_DISABLE, NULL, 0, NULL, 0, 0); |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 295 | } |
| 296 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 297 | 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] | 298 | { |
| 299 | int result; |
| 300 | u8 d; |
| 301 | |
| 302 | result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ, |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 303 | &address, 1, &d, 1, 0); |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 304 | *data = d; |
| 305 | return result; |
| 306 | } |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 307 | |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 308 | static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data) |
| 309 | { |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 310 | u8 wdata[2] = { address, data }; |
| 311 | return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE, |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 312 | wdata, 2, NULL, 0, 0); |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 313 | } |
| 314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | /* |
| 316 | * Externally callable EC access functions. For now, assume 1 EC only |
| 317 | */ |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 318 | int ec_burst_enable(void) |
| 319 | { |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 320 | if (!first_ec) |
| 321 | return -ENODEV; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 322 | return acpi_ec_burst_enable(first_ec); |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | EXPORT_SYMBOL(ec_burst_enable); |
| 326 | |
| 327 | int ec_burst_disable(void) |
| 328 | { |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 329 | if (!first_ec) |
| 330 | return -ENODEV; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 331 | return acpi_ec_burst_disable(first_ec); |
Alexey Starikovskiy | c45aac4 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | EXPORT_SYMBOL(ec_burst_disable); |
| 335 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 336 | int ec_read(u8 addr, u8 * val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | int err; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 339 | u8 temp_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
| 341 | if (!first_ec) |
| 342 | return -ENODEV; |
| 343 | |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 344 | err = acpi_ec_read(first_ec, addr, &temp_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | int err; |
| 358 | |
| 359 | if (!first_ec) |
| 360 | return -ENODEV; |
| 361 | |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 362 | err = acpi_ec_write(first_ec, addr, val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
| 364 | return err; |
| 365 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | EXPORT_SYMBOL(ec_write); |
| 368 | |
Randy Dunlap | 616362d | 2006-10-27 01:47:34 -0400 | [diff] [blame] | 369 | int ec_transaction(u8 command, |
Alexey Starikovskiy | 9e19721 | 2007-03-07 18:29:35 -0500 | [diff] [blame] | 370 | const u8 * wdata, unsigned wdata_len, |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 371 | u8 * rdata, unsigned rdata_len, |
| 372 | int force_poll) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 373 | { |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 374 | if (!first_ec) |
| 375 | return -ENODEV; |
| 376 | |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 377 | return acpi_ec_transaction(first_ec, command, wdata, |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 378 | wdata_len, rdata, rdata_len, |
| 379 | force_poll); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 380 | } |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 381 | |
Lennart Poettering | ab9e43c | 2006-10-03 22:49:00 -0400 | [diff] [blame] | 382 | EXPORT_SYMBOL(ec_transaction); |
| 383 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 384 | static int acpi_ec_query(struct acpi_ec *ec, u8 * data) |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 385 | { |
| 386 | int result; |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 387 | u8 d; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 388 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 389 | if (!ec || !data) |
| 390 | return -EINVAL; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 391 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 392 | /* |
| 393 | * Query the EC to find out which _Qxx method we need to evaluate. |
| 394 | * Note that successful completion of the query causes the ACPI_EC_SCI |
| 395 | * bit to be cleared (and thus clearing the interrupt source). |
| 396 | */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 397 | |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 398 | result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1, 0); |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 399 | if (result) |
| 400 | return result; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 401 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 402 | if (!d) |
| 403 | return -ENODATA; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 404 | |
Alexey Starikovskiy | 6ccedb1 | 2006-12-07 18:42:17 +0300 | [diff] [blame] | 405 | *data = d; |
| 406 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | } |
| 408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | /* -------------------------------------------------------------------------- |
| 410 | Event Management |
| 411 | -------------------------------------------------------------------------- */ |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 412 | int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit, |
| 413 | acpi_handle handle, acpi_ec_query_func func, |
| 414 | void *data) |
| 415 | { |
| 416 | struct acpi_ec_query_handler *handler = |
| 417 | kzalloc(sizeof(struct acpi_ec_query_handler), GFP_KERNEL); |
| 418 | if (!handler) |
| 419 | return -ENOMEM; |
| 420 | |
| 421 | handler->query_bit = query_bit; |
| 422 | handler->handle = handle; |
| 423 | handler->func = func; |
| 424 | handler->data = data; |
| 425 | mutex_lock(&ec->lock); |
Alexey Starikovskiy | 30c0857 | 2007-09-26 19:43:22 +0400 | [diff] [blame] | 426 | list_add(&handler->node, &ec->list); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 427 | mutex_unlock(&ec->lock); |
| 428 | return 0; |
| 429 | } |
| 430 | |
| 431 | EXPORT_SYMBOL_GPL(acpi_ec_add_query_handler); |
| 432 | |
| 433 | void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit) |
| 434 | { |
| 435 | struct acpi_ec_query_handler *handler; |
| 436 | mutex_lock(&ec->lock); |
| 437 | list_for_each_entry(handler, &ec->list, node) { |
| 438 | if (query_bit == handler->query_bit) { |
| 439 | list_del(&handler->node); |
| 440 | kfree(handler); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 441 | } |
| 442 | } |
| 443 | mutex_unlock(&ec->lock); |
| 444 | } |
| 445 | |
| 446 | EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 448 | static void acpi_ec_gpe_query(void *ec_cxt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | { |
Alexey Starikovskiy | 3d02b90 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 450 | struct acpi_ec *ec = ec_cxt; |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 451 | u8 value = 0; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 452 | struct acpi_ec_query_handler *handler, copy; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 453 | |
Alexey Starikovskiy | 5d0c288 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 454 | if (!ec || acpi_ec_query(ec, &value)) |
Alexey Starikovskiy | e41334c | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 455 | return; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 456 | mutex_lock(&ec->lock); |
| 457 | list_for_each_entry(handler, &ec->list, node) { |
| 458 | if (value == handler->query_bit) { |
| 459 | /* have custom handler for this bit */ |
| 460 | memcpy(©, handler, sizeof(copy)); |
| 461 | mutex_unlock(&ec->lock); |
| 462 | if (copy.func) { |
| 463 | copy.func(copy.data); |
| 464 | } else if (copy.handle) { |
| 465 | acpi_evaluate_object(copy.handle, NULL, NULL, NULL); |
| 466 | } |
| 467 | return; |
| 468 | } |
| 469 | } |
| 470 | mutex_unlock(&ec->lock); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 471 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 473 | static u32 acpi_ec_gpe_handler(void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 475 | acpi_status status = AE_OK; |
Alexey Starikovskiy | 3d02b90 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 476 | struct acpi_ec *ec = data; |
Lennart Poettering | 00eb43a | 2007-05-04 14:16:19 +0200 | [diff] [blame] | 477 | |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 478 | clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); |
Alexey Starikovskiy | 7843932 | 2007-10-22 14:18:43 +0400 | [diff] [blame] | 479 | if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) |
Alexey Starikovskiy | af3fd14 | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 480 | wake_up(&ec->wait); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 481 | |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 482 | if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI) { |
| 483 | if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) |
| 484 | status = acpi_os_execute(OSL_EC_BURST_HANDLER, |
| 485 | acpi_ec_gpe_query, ec); |
Alexey Starikovskiy | 7843932 | 2007-10-22 14:18:43 +0400 | [diff] [blame] | 486 | } else if (unlikely(!test_bit(EC_FLAGS_GPE_MODE, &ec->flags))) |
| 487 | set_bit(EC_FLAGS_GPE_MODE, &ec->flags); |
Alexey Starikovskiy | e41334c | 2006-12-07 18:42:16 +0300 | [diff] [blame] | 488 | |
Alexey Starikovskiy | 7843932 | 2007-10-22 14:18:43 +0400 | [diff] [blame] | 489 | return ACPI_SUCCESS(status) ? |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 490 | ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | } |
| 492 | |
| 493 | /* -------------------------------------------------------------------------- |
| 494 | Address Space Management |
| 495 | -------------------------------------------------------------------------- */ |
| 496 | |
| 497 | static acpi_status |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 498 | acpi_ec_space_setup(acpi_handle region_handle, |
| 499 | u32 function, void *handler_context, void **return_context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | { |
| 501 | /* |
| 502 | * The EC object is in the handler context and is needed |
| 503 | * when calling the acpi_ec_space_handler. |
| 504 | */ |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 505 | *return_context = (function != ACPI_REGION_DEACTIVATE) ? |
| 506 | handler_context : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | |
| 508 | return AE_OK; |
| 509 | } |
| 510 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | static acpi_status |
Alexey Starikovskiy | 5b7734b | 2007-05-29 16:42:52 +0400 | [diff] [blame] | 512 | acpi_ec_space_handler(u32 function, acpi_physical_address address, |
| 513 | u32 bits, acpi_integer *value, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 514 | void *handler_context, void *region_context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | { |
Alexey Starikovskiy | 3d02b90 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 516 | struct acpi_ec *ec = handler_context; |
Alexey Starikovskiy | 5b7734b | 2007-05-29 16:42:52 +0400 | [diff] [blame] | 517 | int result = 0, i = 0; |
| 518 | u8 temp = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | if ((address > 0xFF) || !value || !handler_context) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 521 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
Alexey Starikovskiy | 5b7734b | 2007-05-29 16:42:52 +0400 | [diff] [blame] | 523 | if (function != ACPI_READ && function != ACPI_WRITE) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 524 | return AE_BAD_PARAMETER; |
Alexey Starikovskiy | 5b7734b | 2007-05-29 16:42:52 +0400 | [diff] [blame] | 525 | |
| 526 | if (bits != 8 && acpi_strict) |
| 527 | return AE_BAD_PARAMETER; |
| 528 | |
| 529 | while (bits - i > 0) { |
| 530 | if (function == ACPI_READ) { |
| 531 | result = acpi_ec_read(ec, address, &temp); |
| 532 | (*value) |= ((acpi_integer)temp) << i; |
| 533 | } else { |
| 534 | temp = 0xff & ((*value) >> i); |
| 535 | result = acpi_ec_write(ec, address, temp); |
| 536 | } |
| 537 | i += 8; |
| 538 | ++address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | } |
| 540 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | switch (result) { |
| 542 | case -EINVAL: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 543 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | break; |
| 545 | case -ENODEV: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 546 | return AE_NOT_FOUND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | break; |
| 548 | case -ETIME: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 549 | return AE_TIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | break; |
| 551 | default: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 552 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | } |
| 555 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | /* -------------------------------------------------------------------------- |
| 557 | FS Interface (/proc) |
| 558 | -------------------------------------------------------------------------- */ |
| 559 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 560 | static struct proc_dir_entry *acpi_ec_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 562 | static int acpi_ec_read_info(struct seq_file *seq, void *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | { |
Alexey Starikovskiy | 3d02b90 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 564 | struct acpi_ec *ec = seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | if (!ec) |
| 567 | goto end; |
| 568 | |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 569 | seq_printf(seq, "gpe:\t\t\t0x%02x\n", (u32) ec->gpe); |
| 570 | seq_printf(seq, "ports:\t\t\t0x%02x, 0x%02x\n", |
| 571 | (unsigned)ec->command_addr, (unsigned)ec->data_addr); |
| 572 | seq_printf(seq, "use global lock:\t%s\n", |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 573 | ec->global_lock ? "yes" : "no"); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 574 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 575 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | } |
| 577 | |
| 578 | static int acpi_ec_info_open_fs(struct inode *inode, struct file *file) |
| 579 | { |
| 580 | return single_open(file, acpi_ec_read_info, PDE(inode)->data); |
| 581 | } |
| 582 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 583 | static struct file_operations acpi_ec_info_ops = { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 584 | .open = acpi_ec_info_open_fs, |
| 585 | .read = seq_read, |
| 586 | .llseek = seq_lseek, |
| 587 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | .owner = THIS_MODULE, |
| 589 | }; |
| 590 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 591 | static int acpi_ec_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 593 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | if (!acpi_device_dir(device)) { |
| 596 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 597 | acpi_ec_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 599 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | entry = create_proc_entry(ACPI_EC_FILE_INFO, S_IRUGO, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 603 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 605 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | else { |
| 607 | entry->proc_fops = &acpi_ec_info_ops; |
| 608 | entry->data = acpi_driver_data(device); |
| 609 | entry->owner = THIS_MODULE; |
| 610 | } |
| 611 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 612 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | } |
| 614 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 615 | static int acpi_ec_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | |
| 618 | if (acpi_device_dir(device)) { |
| 619 | remove_proc_entry(ACPI_EC_FILE_INFO, acpi_device_dir(device)); |
| 620 | remove_proc_entry(acpi_device_bid(device), acpi_ec_dir); |
| 621 | acpi_device_dir(device) = NULL; |
| 622 | } |
| 623 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 624 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | } |
| 626 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | /* -------------------------------------------------------------------------- |
| 628 | Driver Interface |
| 629 | -------------------------------------------------------------------------- */ |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 630 | static acpi_status |
| 631 | ec_parse_io_ports(struct acpi_resource *resource, void *context); |
| 632 | |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 633 | static struct acpi_ec *make_acpi_ec(void) |
| 634 | { |
| 635 | struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
| 636 | if (!ec) |
| 637 | return NULL; |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 638 | ec->flags = 1 << EC_FLAGS_QUERY_PENDING; |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 639 | mutex_init(&ec->lock); |
| 640 | init_waitqueue_head(&ec->wait); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 641 | INIT_LIST_HEAD(&ec->list); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 642 | return ec; |
| 643 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 645 | static acpi_status |
Alexey Starikovskiy | c019b19 | 2007-08-14 01:03:42 -0400 | [diff] [blame] | 646 | acpi_ec_register_query_methods(acpi_handle handle, u32 level, |
| 647 | void *context, void **return_value) |
| 648 | { |
| 649 | struct acpi_namespace_node *node = handle; |
| 650 | struct acpi_ec *ec = context; |
| 651 | int value = 0; |
| 652 | if (sscanf(node->name.ascii, "_Q%x", &value) == 1) { |
| 653 | acpi_ec_add_query_handler(ec, value, handle, NULL, NULL); |
| 654 | } |
| 655 | return AE_OK; |
| 656 | } |
| 657 | |
| 658 | static acpi_status |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 659 | ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval) |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 660 | { |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 661 | acpi_status status; |
| 662 | |
| 663 | struct acpi_ec *ec = context; |
| 664 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
| 665 | ec_parse_io_ports, ec); |
| 666 | if (ACPI_FAILURE(status)) |
| 667 | return status; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 668 | |
| 669 | /* Get GPE bit assignment (EC events). */ |
| 670 | /* TODO: Add support for _GPE returning a package */ |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 671 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec->gpe); |
| 672 | if (ACPI_FAILURE(status)) |
| 673 | return status; |
Alexey Starikovskiy | c019b19 | 2007-08-14 01:03:42 -0400 | [diff] [blame] | 674 | /* Find and register all query methods */ |
| 675 | acpi_walk_namespace(ACPI_TYPE_METHOD, handle, 1, |
| 676 | acpi_ec_register_query_methods, ec, NULL); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 677 | /* Use the global lock for all EC transactions? */ |
| 678 | acpi_evaluate_integer(handle, "_GLK", NULL, &ec->global_lock); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 679 | ec->handle = handle; |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 680 | return AE_CTRL_TERMINATE; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 681 | } |
| 682 | |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 683 | static void ec_remove_handlers(struct acpi_ec *ec) |
| 684 | { |
| 685 | if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle, |
| 686 | ACPI_ADR_SPACE_EC, &acpi_ec_space_handler))) |
| 687 | printk(KERN_ERR PREFIX "failed to remove space handler\n"); |
| 688 | if (ACPI_FAILURE(acpi_remove_gpe_handler(NULL, ec->gpe, |
| 689 | &acpi_ec_gpe_handler))) |
| 690 | printk(KERN_ERR PREFIX "failed to remove gpe handler\n"); |
| 691 | ec->handlers_installed = 0; |
| 692 | } |
| 693 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 694 | static int acpi_ec_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 696 | struct acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 699 | return -EINVAL; |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 700 | strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); |
| 701 | strcpy(acpi_device_class(device), ACPI_EC_CLASS); |
| 702 | |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 703 | /* Check for boot EC */ |
| 704 | if (boot_ec) { |
| 705 | if (boot_ec->handle == device->handle) { |
| 706 | /* Pre-loaded EC from DSDT, just move pointer */ |
| 707 | ec = boot_ec; |
| 708 | boot_ec = NULL; |
| 709 | goto end; |
| 710 | } else if (boot_ec->handle == ACPI_ROOT_OBJECT) { |
| 711 | /* ECDT-based EC, time to shut it down */ |
| 712 | ec_remove_handlers(boot_ec); |
| 713 | kfree(boot_ec); |
| 714 | first_ec = boot_ec = NULL; |
| 715 | } |
| 716 | } |
| 717 | |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 718 | ec = make_acpi_ec(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | if (!ec) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 720 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 722 | if (ec_parse_device(device->handle, 0, ec, NULL) != |
| 723 | AE_CTRL_TERMINATE) { |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 724 | kfree(ec); |
| 725 | return -EINVAL; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 726 | } |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 727 | ec->handle = device->handle; |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 728 | end: |
| 729 | if (!first_ec) |
| 730 | first_ec = ec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | acpi_driver_data(device) = ec; |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 732 | acpi_ec_add_fs(device); |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 733 | printk(KERN_INFO PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n", |
| 734 | ec->gpe, ec->command_addr, ec->data_addr); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 735 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | } |
| 737 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 738 | static int acpi_ec_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | { |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 740 | struct acpi_ec *ec; |
Adrian Bunk | 07ddf76 | 2007-07-29 17:00:37 +0200 | [diff] [blame] | 741 | struct acpi_ec_query_handler *handler, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 744 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | |
| 746 | ec = acpi_driver_data(device); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 747 | mutex_lock(&ec->lock); |
Adrian Bunk | 07ddf76 | 2007-07-29 17:00:37 +0200 | [diff] [blame] | 748 | list_for_each_entry_safe(handler, tmp, &ec->list, node) { |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 749 | list_del(&handler->node); |
| 750 | kfree(handler); |
| 751 | } |
| 752 | mutex_unlock(&ec->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | acpi_ec_remove_fs(device); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 754 | acpi_driver_data(device) = NULL; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 755 | if (ec == first_ec) |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 756 | first_ec = NULL; |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 757 | kfree(ec); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 758 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | } |
| 760 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | static acpi_status |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 762 | ec_parse_io_ports(struct acpi_resource *resource, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | { |
Alexey Starikovskiy | 3d02b90 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 764 | struct acpi_ec *ec = context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 766 | if (resource->type != ACPI_RESOURCE_TYPE_IO) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | |
| 769 | /* |
| 770 | * The first address region returned is the data port, and |
| 771 | * the second address region returned is the status/command |
| 772 | * port. |
| 773 | */ |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 774 | if (ec->data_addr == 0) |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 775 | ec->data_addr = resource->data.io.minimum; |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 776 | else if (ec->command_addr == 0) |
Denis M. Sadykov | 6ffb221 | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 777 | ec->command_addr = resource->data.io.minimum; |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 778 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | return AE_CTRL_TERMINATE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | return AE_OK; |
| 782 | } |
| 783 | |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 784 | static int ec_install_handlers(struct acpi_ec *ec) |
| 785 | { |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 786 | acpi_status status; |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 787 | if (ec->handlers_installed) |
| 788 | return 0; |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 789 | status = acpi_install_gpe_handler(NULL, ec->gpe, |
| 790 | ACPI_GPE_EDGE_TRIGGERED, |
| 791 | &acpi_ec_gpe_handler, ec); |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 792 | if (ACPI_FAILURE(status)) |
| 793 | return -ENODEV; |
Alexey Starikovskiy | 01f2246 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 794 | |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 795 | acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); |
| 796 | acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); |
| 797 | |
| 798 | status = acpi_install_address_space_handler(ec->handle, |
| 799 | ACPI_ADR_SPACE_EC, |
| 800 | &acpi_ec_space_handler, |
| 801 | &acpi_ec_space_setup, ec); |
| 802 | if (ACPI_FAILURE(status)) { |
| 803 | acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler); |
| 804 | return -ENODEV; |
| 805 | } |
| 806 | |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 807 | ec->handlers_installed = 1; |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 808 | return 0; |
| 809 | } |
| 810 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 811 | static int acpi_ec_start(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | { |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 813 | struct acpi_ec *ec; |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 814 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 817 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | |
| 819 | ec = acpi_driver_data(device); |
| 820 | |
| 821 | if (!ec) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 822 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 824 | ret = ec_install_handlers(ec); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 825 | |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 826 | /* EC is fully operational, allow queries */ |
Alexey Starikovskiy | 080e412 | 2007-10-22 14:18:30 +0400 | [diff] [blame] | 827 | clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); |
Alexey Starikovskiy | 837012e | 2007-05-29 16:43:02 +0400 | [diff] [blame] | 828 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | } |
| 830 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 831 | static int acpi_ec_stop(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | { |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 833 | struct acpi_ec *ec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 835 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | ec = acpi_driver_data(device); |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 837 | if (!ec) |
| 838 | return -EINVAL; |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 839 | ec_remove_handlers(ec); |
Alexey Starikovskiy | f9319f9 | 2007-08-24 08:10:11 +0400 | [diff] [blame] | 840 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 841 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | } |
| 843 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 844 | int __init acpi_ec_ecdt_probe(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 846 | int ret; |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 847 | acpi_status status; |
| 848 | struct acpi_table_ecdt *ecdt_ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | |
Alexey Starikovskiy | d66d969 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 850 | boot_ec = make_acpi_ec(); |
| 851 | if (!boot_ec) |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 852 | return -ENOMEM; |
| 853 | /* |
| 854 | * Generate a boot ec context |
| 855 | */ |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 856 | status = acpi_get_table(ACPI_SIG_ECDT, 1, |
| 857 | (struct acpi_table_header **)&ecdt_ptr); |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 858 | if (ACPI_SUCCESS(status)) { |
Alexey Starikovskiy | 4c61106 | 2007-09-05 19:56:38 -0400 | [diff] [blame] | 859 | printk(KERN_INFO PREFIX "EC description table is found, configuring boot EC\n"); |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 860 | boot_ec->command_addr = ecdt_ptr->control.address; |
| 861 | boot_ec->data_addr = ecdt_ptr->data.address; |
| 862 | boot_ec->gpe = ecdt_ptr->gpe; |
| 863 | boot_ec->handle = ACPI_ROOT_OBJECT; |
| 864 | } else { |
| 865 | printk(KERN_DEBUG PREFIX "Look up EC in DSDT\n"); |
| 866 | status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device, |
| 867 | boot_ec, NULL); |
Alexey Starikovskiy | 2d8348b | 2007-08-31 09:05:26 +0400 | [diff] [blame] | 868 | /* Check that acpi_get_devices actually find something */ |
| 869 | if (ACPI_FAILURE(status) || !boot_ec->handle) |
Alexey Starikovskiy | cd8c93a | 2007-08-03 17:52:48 -0400 | [diff] [blame] | 870 | goto error; |
| 871 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
Alexey Starikovskiy | d66d969 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 873 | ret = ec_install_handlers(boot_ec); |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 874 | if (!ret) { |
| 875 | first_ec = boot_ec; |
Alexey Starikovskiy | e828432 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 876 | return 0; |
Alexey Starikovskiy | d033879 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 877 | } |
Alexey Starikovskiy | c0900c3 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 878 | error: |
Alexey Starikovskiy | d66d969 | 2007-03-07 22:28:00 +0300 | [diff] [blame] | 879 | kfree(boot_ec); |
| 880 | boot_ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | return -ENODEV; |
| 882 | } |
| 883 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 884 | static int __init acpi_ec_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 886 | int result = 0; |
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 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 889 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | |
| 891 | acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir); |
| 892 | if (!acpi_ec_dir) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 893 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | |
| 895 | /* Now register the driver for the EC */ |
| 896 | result = acpi_bus_register_driver(&acpi_ec_driver); |
| 897 | if (result < 0) { |
| 898 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 899 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | } |
| 901 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 902 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | } |
| 904 | |
| 905 | subsys_initcall(acpi_ec_init); |
| 906 | |
| 907 | /* EC driver currently not unloadable */ |
| 908 | #if 0 |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 909 | static void __exit acpi_ec_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | |
| 912 | acpi_bus_unregister_driver(&acpi_ec_driver); |
| 913 | |
| 914 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); |
| 915 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 916 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | } |
Alexey Starikovskiy | 7843932 | 2007-10-22 14:18:43 +0400 | [diff] [blame] | 918 | #endif /* 0 */ |