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" |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 48 | |
| 49 | /* EC status register */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */ |
| 51 | #define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */ |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 52 | #define ACPI_EC_FLAG_BURST 0x10 /* burst mode */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 54 | |
| 55 | /* EC commands */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #define ACPI_EC_COMMAND_READ 0x80 |
| 57 | #define ACPI_EC_COMMAND_WRITE 0x81 |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 58 | #define ACPI_EC_BURST_ENABLE 0x82 |
| 59 | #define ACPI_EC_BURST_DISABLE 0x83 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | #define ACPI_EC_COMMAND_QUERY 0x84 |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 61 | |
| 62 | /* EC events */ |
| 63 | enum { |
| 64 | ACPI_EC_EVENT_OBF_1 = 1, /* Output buffer full */ |
| 65 | ACPI_EC_EVENT_IBF_0, /* Input buffer empty */ |
| 66 | }; |
| 67 | |
| 68 | #define ACPI_EC_DELAY 50 /* Wait 50ms max. during EC ops */ |
| 69 | #define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ |
| 70 | #define ACPI_EC_UDELAY 100 /* Poll @ 100us increments */ |
| 71 | #define ACPI_EC_UDELAY_COUNT 1000 /* Wait 10ms max. during EC ops */ |
| 72 | |
| 73 | enum { |
| 74 | EC_INTR = 1, /* Output buffer full */ |
| 75 | EC_POLL, /* Input buffer empty */ |
| 76 | }; |
| 77 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 78 | static int acpi_ec_remove(struct acpi_device *device, int type); |
| 79 | static int acpi_ec_start(struct acpi_device *device); |
| 80 | static int acpi_ec_stop(struct acpi_device *device, int type); |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 81 | static int acpi_ec_add(struct acpi_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | static struct acpi_driver acpi_ec_driver = { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 84 | .name = ACPI_EC_DRIVER_NAME, |
| 85 | .class = ACPI_EC_CLASS, |
| 86 | .ids = ACPI_EC_HID, |
| 87 | .ops = { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 88 | .add = acpi_ec_add, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 89 | .remove = acpi_ec_remove, |
| 90 | .start = acpi_ec_start, |
| 91 | .stop = acpi_ec_stop, |
| 92 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | }; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 94 | struct acpi_ec { |
| 95 | acpi_handle handle; |
| 96 | unsigned long uid; |
| 97 | unsigned long gpe_bit; |
| 98 | struct acpi_generic_address status_addr; |
| 99 | struct acpi_generic_address command_addr; |
| 100 | struct acpi_generic_address data_addr; |
| 101 | unsigned long global_lock; |
| 102 | struct semaphore sem; |
| 103 | unsigned int expect_event; |
| 104 | atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */ |
| 105 | wait_queue_head_t wait; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | }; |
| 107 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 108 | /* If we find an EC via the ECDT, we need to keep a ptr to its context */ |
| 109 | static struct acpi_ec *ec_ecdt; |
| 110 | |
| 111 | /* External interfaces use first EC only, so remember */ |
| 112 | static struct acpi_device *first_ec; |
| 113 | static int acpi_ec_mode = EC_INTR; |
| 114 | |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 115 | static void acpi_ec_gpe_poll_query(void *ec_cxt); |
| 116 | static void acpi_ec_gpe_intr_query(void *ec_cxt); |
| 117 | static u32 acpi_ec_gpe_poll_handler(void *data); |
| 118 | static u32 acpi_ec_gpe_intr_handler(void *data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
| 120 | /* -------------------------------------------------------------------------- |
| 121 | Transaction Management |
| 122 | -------------------------------------------------------------------------- */ |
| 123 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 124 | static u32 acpi_ec_read_status(struct acpi_ec *ec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 126 | u32 status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 128 | acpi_hw_low_level_read(8, &status, &ec->status_addr); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 129 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | } |
| 131 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 132 | static u32 acpi_ec_read_data(struct acpi_ec *ec) |
| 133 | { |
| 134 | u32 data = 0; |
| 135 | |
| 136 | acpi_hw_low_level_read(8, &data, &ec->data_addr); |
| 137 | return data; |
| 138 | } |
| 139 | |
| 140 | static void acpi_ec_write_cmd(struct acpi_ec *ec, u32 command) |
| 141 | { |
| 142 | acpi_hw_low_level_write(8, command, &ec->command_addr); |
| 143 | } |
| 144 | |
| 145 | static void acpi_ec_write_data(struct acpi_ec *ec, u32 data) |
| 146 | { |
| 147 | acpi_hw_low_level_write(8, data, &ec->data_addr); |
| 148 | } |
| 149 | |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 150 | static int acpi_ec_check_status(u32 status, u8 event) { |
| 151 | |
| 152 | switch (event) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 153 | case ACPI_EC_EVENT_OBF_1: |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 154 | if (status & ACPI_EC_FLAG_OBF) |
| 155 | return 1; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 156 | break; |
| 157 | case ACPI_EC_EVENT_IBF_0: |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 158 | if (!(status & ACPI_EC_FLAG_IBF)) |
| 159 | return 1; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 160 | break; |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 161 | default: |
| 162 | break; |
| 163 | } |
| 164 | |
| 165 | return 0; |
| 166 | } |
| 167 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 168 | static int acpi_ec_wait(struct acpi_ec *ec, u8 event) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 169 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 170 | int i = (acpi_ec_mode == EC_POLL) ? ACPI_EC_UDELAY_COUNT : 0; |
| 171 | long time_left; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 172 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 173 | ec->expect_event = event; |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 174 | if (acpi_ec_check_status(acpi_ec_read_status(ec), event)) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 175 | ec->expect_event = 0; |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 176 | return 0; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 177 | } |
| 178 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 179 | do { |
| 180 | if (acpi_ec_mode == EC_POLL) { |
| 181 | udelay(ACPI_EC_UDELAY); |
| 182 | } else { |
| 183 | time_left = wait_event_timeout(ec->wait, |
| 184 | !ec->expect_event, |
| 185 | msecs_to_jiffies(ACPI_EC_DELAY)); |
| 186 | if (time_left > 0) { |
| 187 | ec->expect_event = 0; |
| 188 | return 0; |
| 189 | } |
| 190 | } |
| 191 | if (acpi_ec_check_status(acpi_ec_read_status(ec), event)) { |
| 192 | ec->expect_event = 0; |
| 193 | return 0; |
| 194 | } |
| 195 | } while (--i > 0); |
| 196 | |
| 197 | ec->expect_event = 0; |
| 198 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 199 | return -ETIME; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 200 | } |
| 201 | |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 202 | #ifdef ACPI_FUTURE_USAGE |
Luming Yu | 06a2a38 | 2005-09-27 00:43:00 -0400 | [diff] [blame] | 203 | /* |
| 204 | * Note: samsung nv5000 doesn't work with ec burst mode. |
| 205 | * http://bugzilla.kernel.org/show_bug.cgi?id=4980 |
| 206 | */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 207 | int acpi_ec_enter_burst_mode(struct acpi_ec *ec) |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 208 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 209 | u32 tmp = 0; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 210 | u32 status = 0; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 211 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 212 | |
| 213 | status = acpi_ec_read_status(ec); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 214 | if (status != -EINVAL && !(status & ACPI_EC_FLAG_BURST)) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 215 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 216 | if (status) |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 217 | goto end; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 218 | acpi_ec_write_cmd(ec, ACPI_EC_BURST_ENABLE); |
| 219 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1); |
| 220 | tmp = acpi_ec_read_data(ec); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 221 | if (tmp != 0x90) { /* Burst ACK byte */ |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 222 | return -EINVAL; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 223 | } |
Luming Yu | 668d74c | 2005-07-23 00:26:33 -0400 | [diff] [blame] | 224 | } |
| 225 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 226 | atomic_set(&ec->leaving_burst, 0); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 227 | return 0; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 228 | end: |
| 229 | ACPI_EXCEPTION((AE_INFO, status, "EC wait, burst mode")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 230 | return -1; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 231 | } |
| 232 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 233 | int acpi_ec_leave_burst_mode(struct acpi_ec *ec) |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 234 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 235 | u32 status = 0; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 236 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 237 | |
Luming Yu | 06a2a38 | 2005-09-27 00:43:00 -0400 | [diff] [blame] | 238 | status = acpi_ec_read_status(ec); |
| 239 | if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)){ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 240 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
Luming Yu | 06a2a38 | 2005-09-27 00:43:00 -0400 | [diff] [blame] | 241 | if(status) |
| 242 | goto end; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 243 | acpi_ec_write_cmd(ec, ACPI_EC_BURST_DISABLE); |
| 244 | acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 245 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 246 | atomic_set(&ec->leaving_burst, 1); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 247 | return 0; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 248 | end: |
| 249 | ACPI_EXCEPTION((AE_INFO, status, "EC leave burst mode")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 250 | return -1; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 251 | } |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 252 | #endif /* ACPI_FUTURE_USAGE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 254 | static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame^] | 255 | const u8 *wdata, unsigned wdata_len, |
| 256 | u8 *rdata, unsigned rdata_len) |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 257 | { |
| 258 | int result; |
| 259 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 260 | acpi_ec_write_cmd(ec, command); |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 261 | |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 262 | for (; wdata_len > 0; wdata_len --) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 263 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 264 | if (result) |
| 265 | return result; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 266 | acpi_ec_write_data(ec, *(wdata++)); |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame^] | 267 | } |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 268 | |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 269 | if (command == ACPI_EC_COMMAND_WRITE) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 270 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 271 | if (result) |
| 272 | return result; |
| 273 | } |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 274 | |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 275 | for (; rdata_len > 0; rdata_len --) { |
| 276 | u32 d; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 277 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 278 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1); |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 279 | if (result) |
| 280 | return result; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 281 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 282 | d = acpi_ec_read_data(ec); |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 283 | *(rdata++) = (u8) d; |
| 284 | } |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 285 | |
Denis M. Sadykov | 7c6db5e | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 286 | return 0; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 287 | } |
| 288 | |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame^] | 289 | static int acpi_ec_transaction(struct acpi_ec *ec, u8 command, |
| 290 | const u8 *wdata, unsigned wdata_len, |
| 291 | u8 *rdata, unsigned rdata_len) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 292 | { |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 293 | int status; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 294 | u32 glk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 296 | if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 297 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 299 | if (rdata) |
| 300 | memset(rdata, 0, rdata_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 302 | if (ec->global_lock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
| 304 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 305 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 307 | down(&ec->sem); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 308 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 309 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 310 | if (status) { |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame^] | 311 | printk(KERN_DEBUG PREFIX "read EC, IB not empty\n"); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 312 | goto end; |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 313 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 315 | status = acpi_ec_transaction_unlocked(ec, command, |
| 316 | wdata, wdata_len, |
| 317 | rdata, rdata_len); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 318 | |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 319 | end: |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 320 | up(&ec->sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 322 | if (ec->global_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | acpi_release_global_lock(glk); |
| 324 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 325 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | } |
| 327 | |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame^] | 328 | static int acpi_ec_read(struct acpi_ec *ec, u8 address, u32 * data) |
| 329 | { |
| 330 | int result; |
| 331 | u8 d; |
| 332 | |
| 333 | result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ, |
| 334 | &address, 1, &d, 1); |
| 335 | *data = d; |
| 336 | return result; |
| 337 | } |
| 338 | static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data) |
| 339 | { |
| 340 | u8 wdata[2] = { address, data }; |
| 341 | return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE, |
| 342 | wdata, 2, NULL, 0); |
| 343 | } |
| 344 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | /* |
| 346 | * Externally callable EC access functions. For now, assume 1 EC only |
| 347 | */ |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 348 | int ec_read(u8 addr, u8 * val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 350 | struct acpi_ec *ec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | int err; |
| 352 | u32 temp_data; |
| 353 | |
| 354 | if (!first_ec) |
| 355 | return -ENODEV; |
| 356 | |
| 357 | ec = acpi_driver_data(first_ec); |
| 358 | |
| 359 | err = acpi_ec_read(ec, addr, &temp_data); |
| 360 | |
| 361 | if (!err) { |
| 362 | *val = temp_data; |
| 363 | return 0; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 364 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | return err; |
| 366 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 367 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | EXPORT_SYMBOL(ec_read); |
| 369 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 370 | int ec_write(u8 addr, u8 val) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 372 | struct acpi_ec *ec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | int err; |
| 374 | |
| 375 | if (!first_ec) |
| 376 | return -ENODEV; |
| 377 | |
| 378 | ec = acpi_driver_data(first_ec); |
| 379 | |
| 380 | err = acpi_ec_write(ec, addr, val); |
| 381 | |
| 382 | return err; |
| 383 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | EXPORT_SYMBOL(ec_write); |
| 386 | |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 387 | extern int ec_transaction(u8 command, |
| 388 | const u8 *wdata, unsigned wdata_len, |
| 389 | u8 *rdata, unsigned rdata_len) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 390 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 391 | struct acpi_ec *ec; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 392 | |
| 393 | if (!first_ec) |
| 394 | return -ENODEV; |
| 395 | |
| 396 | ec = acpi_driver_data(first_ec); |
| 397 | |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame^] | 398 | return acpi_ec_transaction(ec, command, wdata, |
| 399 | wdata_len, rdata, rdata_len); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 400 | } |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 401 | |
Denis M. Sadykov | 3576cf6 | 2006-09-26 19:50:33 +0400 | [diff] [blame^] | 402 | static int acpi_ec_query(struct acpi_ec *ec, u32 * data) |
| 403 | { |
| 404 | int result; |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 405 | u8 d; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 406 | |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 407 | if (!ec || !data) |
| 408 | return -EINVAL; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 409 | |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 410 | /* |
| 411 | * Query the EC to find out which _Qxx method we need to evaluate. |
| 412 | * Note that successful completion of the query causes the ACPI_EC_SCI |
| 413 | * bit to be cleared (and thus clearing the interrupt source). |
| 414 | */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 415 | |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 416 | result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1); |
| 417 | if (result) |
| 418 | return result; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 419 | |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 420 | if (!d) |
| 421 | return -ENODATA; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 422 | |
Lennart Poettering | d7a76e4 | 2006-09-05 12:12:24 -0400 | [diff] [blame] | 423 | *data = d; |
| 424 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | } |
| 426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | /* -------------------------------------------------------------------------- |
| 428 | Event Management |
| 429 | -------------------------------------------------------------------------- */ |
| 430 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 431 | union acpi_ec_query_data { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 432 | acpi_handle handle; |
| 433 | u8 data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | }; |
| 435 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 436 | static void acpi_ec_gpe_query(void *ec_cxt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 438 | if (acpi_ec_mode == EC_POLL) |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 439 | acpi_ec_gpe_poll_query(ec_cxt); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 440 | else |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 441 | acpi_ec_gpe_intr_query(ec_cxt); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 442 | } |
| 443 | |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 444 | static void acpi_ec_gpe_poll_query(void *ec_cxt) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 445 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 446 | struct acpi_ec *ec = (struct acpi_ec *)ec_cxt; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 447 | u32 value = 0; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 448 | static char object_name[5] = { '_', 'Q', '0', '0', '\0' }; |
| 449 | const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', |
| 450 | '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' |
| 451 | }; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 452 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 453 | |
| 454 | if (!ec_cxt) |
| 455 | goto end; |
| 456 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 457 | if (down_interruptible (&ec->sem)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 458 | return; |
Rich Townsend | f9a6ee1a | 2005-12-19 23:07:00 -0500 | [diff] [blame] | 459 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 460 | value = acpi_ec_read_status(ec); |
| 461 | up(&ec->sem); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 462 | |
| 463 | /* TBD: Implement asynch events! |
| 464 | * NOTE: All we care about are EC-SCI's. Other EC events are |
| 465 | * handled via polling (yuck!). This is because some systems |
| 466 | * treat EC-SCIs as level (versus EDGE!) triggered, preventing |
| 467 | * a purely interrupt-driven approach (grumble, grumble). |
| 468 | */ |
| 469 | if (!(value & ACPI_EC_FLAG_SCI)) |
| 470 | goto end; |
| 471 | |
| 472 | if (acpi_ec_query(ec, &value)) |
| 473 | goto end; |
| 474 | |
| 475 | object_name[2] = hex[((value >> 4) & 0x0F)]; |
| 476 | object_name[3] = hex[(value & 0x0F)]; |
| 477 | |
| 478 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name)); |
| 479 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 480 | acpi_evaluate_object(ec->handle, object_name, NULL, NULL); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 481 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 482 | end: |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 483 | acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 484 | } |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 485 | static void acpi_ec_gpe_intr_query(void *ec_cxt) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 486 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 487 | struct acpi_ec *ec = (struct acpi_ec *)ec_cxt; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 488 | u32 value; |
| 489 | int result = -ENODATA; |
| 490 | static char object_name[5] = { '_', 'Q', '0', '0', '\0' }; |
| 491 | const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', |
| 492 | '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' |
| 493 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 496 | if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI) |
| 497 | result = acpi_ec_query(ec, &value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 499 | if (result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | goto end; |
| 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | object_name[2] = hex[((value >> 4) & 0x0F)]; |
| 503 | object_name[3] = hex[(value & 0x0F)]; |
| 504 | |
| 505 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name)); |
| 506 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 507 | acpi_evaluate_object(ec->handle, object_name, NULL, NULL); |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 508 | end: |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 509 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | } |
| 511 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 512 | static u32 acpi_ec_gpe_handler(void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 514 | if (acpi_ec_mode == EC_POLL) |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 515 | return acpi_ec_gpe_poll_handler(data); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 516 | else |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 517 | return acpi_ec_gpe_intr_handler(data); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 518 | } |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 519 | static u32 acpi_ec_gpe_poll_handler(void *data) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 520 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 521 | acpi_status status = AE_OK; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 522 | struct acpi_ec *ec = (struct acpi_ec *)data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
| 524 | if (!ec) |
| 525 | return ACPI_INTERRUPT_NOT_HANDLED; |
| 526 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 527 | acpi_disable_gpe(NULL, ec->gpe_bit, ACPI_ISR); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 528 | |
Alexey Starikovskiy | b8d3519 | 2006-05-05 03:23:00 -0400 | [diff] [blame] | 529 | status = acpi_os_execute(OSL_EC_POLL_HANDLER, acpi_ec_gpe_query, ec); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 530 | |
| 531 | if (status == AE_OK) |
| 532 | return ACPI_INTERRUPT_HANDLED; |
| 533 | else |
| 534 | return ACPI_INTERRUPT_NOT_HANDLED; |
| 535 | } |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 536 | static u32 acpi_ec_gpe_intr_handler(void *data) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 537 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 538 | acpi_status status = AE_OK; |
| 539 | u32 value; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 540 | struct acpi_ec *ec = (struct acpi_ec *)data; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 541 | |
| 542 | if (!ec) |
| 543 | return ACPI_INTERRUPT_NOT_HANDLED; |
| 544 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 545 | acpi_clear_gpe(NULL, ec->gpe_bit, ACPI_ISR); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 546 | value = acpi_ec_read_status(ec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 548 | switch (ec->expect_event) { |
| 549 | case ACPI_EC_EVENT_OBF_1: |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 550 | if (!(value & ACPI_EC_FLAG_OBF)) |
| 551 | break; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 552 | ec->expect_event = 0; |
| 553 | wake_up(&ec->wait); |
Vladimir Lebedev | 49fee981 | 2006-06-20 16:46:00 -0400 | [diff] [blame] | 554 | break; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 555 | case ACPI_EC_EVENT_IBF_0: |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 556 | if ((value & ACPI_EC_FLAG_IBF)) |
| 557 | break; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 558 | ec->expect_event = 0; |
| 559 | wake_up(&ec->wait); |
Vladimir Lebedev | 49fee981 | 2006-06-20 16:46:00 -0400 | [diff] [blame] | 560 | break; |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame] | 561 | default: |
| 562 | break; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 563 | } |
| 564 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 565 | if (value & ACPI_EC_FLAG_SCI) { |
Alexey Starikovskiy | b8d3519 | 2006-05-05 03:23:00 -0400 | [diff] [blame] | 566 | status = acpi_os_execute(OSL_EC_BURST_HANDLER, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 567 | acpi_ec_gpe_query, ec); |
Luming Yu | 17e9c78 | 2005-04-22 23:07:10 -0400 | [diff] [blame] | 568 | return status == AE_OK ? |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 569 | ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; |
| 570 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 571 | acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_ISR); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 572 | return status == AE_OK ? |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 573 | ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
| 575 | |
| 576 | /* -------------------------------------------------------------------------- |
| 577 | Address Space Management |
| 578 | -------------------------------------------------------------------------- */ |
| 579 | |
| 580 | static acpi_status |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 581 | acpi_ec_space_setup(acpi_handle region_handle, |
| 582 | u32 function, void *handler_context, void **return_context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | { |
| 584 | /* |
| 585 | * The EC object is in the handler context and is needed |
| 586 | * when calling the acpi_ec_space_handler. |
| 587 | */ |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 588 | *return_context = (function != ACPI_REGION_DEACTIVATE) ? |
| 589 | handler_context : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | |
| 591 | return AE_OK; |
| 592 | } |
| 593 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | static acpi_status |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 595 | acpi_ec_space_handler(u32 function, |
| 596 | acpi_physical_address address, |
| 597 | u32 bit_width, |
| 598 | acpi_integer * value, |
| 599 | void *handler_context, void *region_context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 601 | int result = 0; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 602 | struct acpi_ec *ec = NULL; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 603 | u64 temp = *value; |
| 604 | acpi_integer f_v = 0; |
| 605 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | |
| 608 | if ((address > 0xFF) || !value || !handler_context) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 609 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 611 | if (bit_width != 8 && acpi_strict) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 612 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | } |
| 614 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 615 | ec = (struct acpi_ec *)handler_context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 617 | next_byte: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | switch (function) { |
| 619 | case ACPI_READ: |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 620 | temp = 0; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 621 | result = acpi_ec_read(ec, (u8) address, (u32 *) & temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | break; |
| 623 | case ACPI_WRITE: |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 624 | result = acpi_ec_write(ec, (u8) address, (u8) temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | break; |
| 626 | default: |
| 627 | result = -EINVAL; |
| 628 | goto out; |
| 629 | break; |
| 630 | } |
| 631 | |
| 632 | bit_width -= 8; |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 633 | if (bit_width) { |
| 634 | if (function == ACPI_READ) |
| 635 | f_v |= temp << 8 * i; |
| 636 | if (function == ACPI_WRITE) |
| 637 | temp >>= 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | i++; |
Andrew Morton | 83ea744 | 2005-03-30 22:12:13 -0500 | [diff] [blame] | 639 | address++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | goto next_byte; |
| 641 | } |
| 642 | |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 643 | if (function == ACPI_READ) { |
| 644 | f_v |= temp << 8 * i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | *value = f_v; |
| 646 | } |
| 647 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 648 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | switch (result) { |
| 650 | case -EINVAL: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 651 | return AE_BAD_PARAMETER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | break; |
| 653 | case -ENODEV: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 654 | return AE_NOT_FOUND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | break; |
| 656 | case -ETIME: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 657 | return AE_TIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | break; |
| 659 | default: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 660 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | } |
| 663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | /* -------------------------------------------------------------------------- |
| 665 | FS Interface (/proc) |
| 666 | -------------------------------------------------------------------------- */ |
| 667 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 668 | static struct proc_dir_entry *acpi_ec_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 670 | static int acpi_ec_read_info(struct seq_file *seq, void *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 672 | struct acpi_ec *ec = (struct acpi_ec *)seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | |
| 675 | if (!ec) |
| 676 | goto end; |
| 677 | |
| 678 | seq_printf(seq, "gpe bit: 0x%02x\n", |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 679 | (u32) ec->gpe_bit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | seq_printf(seq, "ports: 0x%02x, 0x%02x\n", |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 681 | (u32) ec->status_addr.address, |
| 682 | (u32) ec->data_addr.address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | seq_printf(seq, "use global lock: %s\n", |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 684 | ec->global_lock ? "yes" : "no"); |
| 685 | acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 687 | end: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 688 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | } |
| 690 | |
| 691 | static int acpi_ec_info_open_fs(struct inode *inode, struct file *file) |
| 692 | { |
| 693 | return single_open(file, acpi_ec_read_info, PDE(inode)->data); |
| 694 | } |
| 695 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 696 | static struct file_operations acpi_ec_info_ops = { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 697 | .open = acpi_ec_info_open_fs, |
| 698 | .read = seq_read, |
| 699 | .llseek = seq_lseek, |
| 700 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | .owner = THIS_MODULE, |
| 702 | }; |
| 703 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 704 | static int acpi_ec_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 706 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | |
| 709 | if (!acpi_device_dir(device)) { |
| 710 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 711 | acpi_ec_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | if (!acpi_device_dir(device)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 713 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | } |
| 715 | |
| 716 | entry = create_proc_entry(ACPI_EC_FILE_INFO, S_IRUGO, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 717 | acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | if (!entry) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 719 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | else { |
| 721 | entry->proc_fops = &acpi_ec_info_ops; |
| 722 | entry->data = acpi_driver_data(device); |
| 723 | entry->owner = THIS_MODULE; |
| 724 | } |
| 725 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 726 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | } |
| 728 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 729 | static int acpi_ec_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
| 732 | if (acpi_device_dir(device)) { |
| 733 | remove_proc_entry(ACPI_EC_FILE_INFO, acpi_device_dir(device)); |
| 734 | remove_proc_entry(acpi_device_bid(device), acpi_ec_dir); |
| 735 | acpi_device_dir(device) = NULL; |
| 736 | } |
| 737 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 738 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | } |
| 740 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | /* -------------------------------------------------------------------------- |
| 742 | Driver Interface |
| 743 | -------------------------------------------------------------------------- */ |
| 744 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 745 | static int acpi_ec_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 747 | int result = 0; |
| 748 | acpi_status status = AE_OK; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 749 | struct acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | |
| 752 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 753 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 755 | ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | if (!ec) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 757 | return -ENOMEM; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 758 | memset(ec, 0, sizeof(struct acpi_ec)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 760 | ec->handle = device->handle; |
| 761 | ec->uid = -1; |
| 762 | init_MUTEX(&ec->sem); |
| 763 | if (acpi_ec_mode == EC_INTR) { |
| 764 | atomic_set(&ec->leaving_burst, 1); |
| 765 | init_waitqueue_head(&ec->wait); |
| 766 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); |
| 768 | strcpy(acpi_device_class(device), ACPI_EC_CLASS); |
| 769 | acpi_driver_data(device) = ec; |
| 770 | |
| 771 | /* Use the global lock for all EC transactions? */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 772 | acpi_evaluate_integer(ec->handle, "_GLK", NULL, |
| 773 | &ec->global_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
Jiri Slaby | ff2fc3e | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 775 | /* XXX we don't test uids, because on some boxes ecdt uid = 0, see: |
| 776 | http://bugzilla.kernel.org/show_bug.cgi?id=6111 */ |
| 777 | if (ec_ecdt) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 779 | ACPI_ADR_SPACE_EC, |
| 780 | &acpi_ec_space_handler); |
| 781 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 782 | acpi_remove_gpe_handler(NULL, ec_ecdt->gpe_bit, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 783 | &acpi_ec_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
| 785 | kfree(ec_ecdt); |
| 786 | } |
| 787 | |
| 788 | /* Get GPE bit assignment (EC events). */ |
| 789 | /* TODO: Add support for _GPE returning a package */ |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 790 | status = |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 791 | acpi_evaluate_integer(ec->handle, "_GPE", NULL, |
| 792 | &ec->gpe_bit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | if (ACPI_FAILURE(status)) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 794 | ACPI_EXCEPTION((AE_INFO, status, "Obtaining GPE bit assignment")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | result = -ENODEV; |
| 796 | goto end; |
| 797 | } |
| 798 | |
| 799 | result = acpi_ec_add_fs(device); |
| 800 | if (result) |
| 801 | goto end; |
| 802 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 803 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s [%s] (gpe %d) interrupt mode.", |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 804 | acpi_device_name(device), acpi_device_bid(device), |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 805 | (u32) ec->gpe_bit)); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 806 | |
| 807 | if (!first_ec) |
| 808 | first_ec = device; |
| 809 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 810 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | if (result) |
| 812 | kfree(ec); |
| 813 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 814 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | } |
| 816 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 817 | static int acpi_ec_remove(struct acpi_device *device, int type) |
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 | struct acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | |
| 822 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 823 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | |
| 825 | ec = acpi_driver_data(device); |
| 826 | |
| 827 | acpi_ec_remove_fs(device); |
| 828 | |
| 829 | kfree(ec); |
| 830 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 831 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | } |
| 833 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | static acpi_status |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 835 | acpi_ec_io_ports(struct acpi_resource *resource, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 837 | struct acpi_ec *ec = (struct acpi_ec *)context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | struct acpi_generic_address *addr; |
| 839 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 840 | if (resource->type != ACPI_RESOURCE_TYPE_IO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | return AE_OK; |
| 842 | } |
| 843 | |
| 844 | /* |
| 845 | * The first address region returned is the data port, and |
| 846 | * the second address region returned is the status/command |
| 847 | * port. |
| 848 | */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 849 | if (ec->data_addr.register_bit_width == 0) { |
| 850 | addr = &ec->data_addr; |
| 851 | } else if (ec->command_addr.register_bit_width == 0) { |
| 852 | addr = &ec->command_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | } else { |
| 854 | return AE_CTRL_TERMINATE; |
| 855 | } |
| 856 | |
| 857 | addr->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO; |
| 858 | addr->register_bit_width = 8; |
| 859 | addr->register_bit_offset = 0; |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 860 | addr->address = resource->data.io.minimum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | |
| 862 | return AE_OK; |
| 863 | } |
| 864 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 865 | static int acpi_ec_start(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 867 | acpi_status status = AE_OK; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 868 | struct acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | |
| 871 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 872 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | |
| 874 | ec = acpi_driver_data(device); |
| 875 | |
| 876 | if (!ec) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 877 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | |
| 879 | /* |
| 880 | * Get I/O port addresses. Convert to GAS format. |
| 881 | */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 882 | status = acpi_walk_resources(ec->handle, METHOD_NAME__CRS, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 883 | acpi_ec_io_ports, ec); |
| 884 | if (ACPI_FAILURE(status) |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 885 | || ec->command_addr.register_bit_width == 0) { |
| 886 | ACPI_EXCEPTION((AE_INFO, status, |
| 887 | "Error getting I/O port addresses")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 888 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | } |
| 890 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 891 | ec->status_addr = ec->command_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 893 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x", |
| 894 | (u32) ec->gpe_bit, |
| 895 | (u32) ec->command_addr.address, |
| 896 | (u32) ec->data_addr.address)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
| 898 | /* |
| 899 | * Install GPE handler |
| 900 | */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 901 | status = acpi_install_gpe_handler(NULL, ec->gpe_bit, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 902 | ACPI_GPE_EDGE_TRIGGERED, |
| 903 | &acpi_ec_gpe_handler, ec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | if (ACPI_FAILURE(status)) { |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 905 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 907 | acpi_set_gpe_type(NULL, ec->gpe_bit, ACPI_GPE_TYPE_RUNTIME); |
| 908 | acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 910 | status = acpi_install_address_space_handler(ec->handle, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 911 | ACPI_ADR_SPACE_EC, |
| 912 | &acpi_ec_space_handler, |
| 913 | &acpi_ec_space_setup, ec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | if (ACPI_FAILURE(status)) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 915 | acpi_remove_gpe_handler(NULL, ec->gpe_bit, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 916 | &acpi_ec_gpe_handler); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 917 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | } |
| 919 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 920 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | } |
| 922 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 923 | static int acpi_ec_stop(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 925 | acpi_status status = AE_OK; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 926 | struct acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | |
| 929 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 930 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | |
| 932 | ec = acpi_driver_data(device); |
| 933 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 934 | status = acpi_remove_address_space_handler(ec->handle, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 935 | ACPI_ADR_SPACE_EC, |
| 936 | &acpi_ec_space_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 938 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 940 | status = |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 941 | acpi_remove_gpe_handler(NULL, ec->gpe_bit, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 942 | &acpi_ec_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 944 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 946 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | } |
| 948 | |
| 949 | static acpi_status __init |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 950 | acpi_fake_ecdt_callback(acpi_handle handle, |
| 951 | u32 Level, void *context, void **retval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 953 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 955 | init_MUTEX(&ec_ecdt->sem); |
| 956 | if (acpi_ec_mode == EC_INTR) { |
| 957 | init_waitqueue_head(&ec_ecdt->wait); |
| 958 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 960 | acpi_ec_io_ports, ec_ecdt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | if (ACPI_FAILURE(status)) |
| 962 | return status; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 963 | ec_ecdt->status_addr = ec_ecdt->command_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 965 | ec_ecdt->uid = -1; |
| 966 | acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 968 | status = |
| 969 | acpi_evaluate_integer(handle, "_GPE", NULL, |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 970 | &ec_ecdt->gpe_bit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | if (ACPI_FAILURE(status)) |
| 972 | return status; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 973 | ec_ecdt->global_lock = TRUE; |
| 974 | ec_ecdt->handle = handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 976 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02x, ports=0x%2x, 0x%2x", |
| 977 | (u32) ec_ecdt->gpe_bit, |
| 978 | (u32) ec_ecdt->command_addr.address, |
| 979 | (u32) ec_ecdt->data_addr.address)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | |
| 981 | return AE_CTRL_TERMINATE; |
| 982 | } |
| 983 | |
| 984 | /* |
| 985 | * Some BIOS (such as some from Gateway laptops) access EC region very early |
| 986 | * such as in BAT0._INI or EC._INI before an EC device is found and |
| 987 | * do not provide an ECDT. According to ACPI spec, ECDT isn't mandatorily |
| 988 | * required, but if EC regison is accessed early, it is required. |
| 989 | * The routine tries to workaround the BIOS bug by pre-scan EC device |
| 990 | * It assumes that _CRS, _HID, _GPE, _UID methods of EC don't touch any |
| 991 | * op region (since _REG isn't invoked yet). The assumption is true for |
| 992 | * all systems found. |
| 993 | */ |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 994 | static int __init acpi_ec_fake_ecdt(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 996 | acpi_status status; |
| 997 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 999 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Try to make an fake ECDT")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1001 | ec_ecdt = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | if (!ec_ecdt) { |
| 1003 | ret = -ENOMEM; |
| 1004 | goto error; |
| 1005 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1006 | memset(ec_ecdt, 0, sizeof(struct acpi_ec)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1008 | status = acpi_get_devices(ACPI_EC_HID, |
| 1009 | acpi_fake_ecdt_callback, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | if (ACPI_FAILURE(status)) { |
| 1011 | kfree(ec_ecdt); |
| 1012 | ec_ecdt = NULL; |
| 1013 | ret = -ENODEV; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1014 | ACPI_EXCEPTION((AE_INFO, status, "Can't make an fake ECDT")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | goto error; |
| 1016 | } |
| 1017 | return 0; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1018 | error: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | return ret; |
| 1020 | } |
| 1021 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1022 | static int __init acpi_ec_get_real_ecdt(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1024 | acpi_status status; |
| 1025 | struct acpi_table_ecdt *ecdt_ptr; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1026 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1027 | status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, |
| 1028 | (struct acpi_table_header **) |
| 1029 | &ecdt_ptr); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1030 | if (ACPI_FAILURE(status)) |
| 1031 | return -ENODEV; |
| 1032 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1033 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found ECDT")); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1034 | |
| 1035 | /* |
| 1036 | * Generate a temporary ec context to use until the namespace is scanned |
| 1037 | */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1038 | ec_ecdt = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1039 | if (!ec_ecdt) |
| 1040 | return -ENOMEM; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1041 | memset(ec_ecdt, 0, sizeof(struct acpi_ec)); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1042 | |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1043 | init_MUTEX(&ec_ecdt->sem); |
| 1044 | if (acpi_ec_mode == EC_INTR) { |
| 1045 | init_waitqueue_head(&ec_ecdt->wait); |
| 1046 | } |
| 1047 | ec_ecdt->command_addr = ecdt_ptr->ec_control; |
| 1048 | ec_ecdt->status_addr = ecdt_ptr->ec_control; |
| 1049 | ec_ecdt->data_addr = ecdt_ptr->ec_data; |
| 1050 | ec_ecdt->gpe_bit = ecdt_ptr->gpe_bit; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1051 | /* use the GL just to be safe */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1052 | ec_ecdt->global_lock = TRUE; |
| 1053 | ec_ecdt->uid = ecdt_ptr->uid; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1054 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1055 | status = |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1056 | acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->handle); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1057 | if (ACPI_FAILURE(status)) { |
| 1058 | goto error; |
| 1059 | } |
| 1060 | |
| 1061 | return 0; |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1062 | error: |
| 1063 | ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | kfree(ec_ecdt); |
| 1065 | ec_ecdt = NULL; |
| 1066 | |
| 1067 | return -ENODEV; |
| 1068 | } |
| 1069 | |
| 1070 | static int __initdata acpi_fake_ecdt_enabled; |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1071 | int __init acpi_ec_ecdt_probe(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1073 | acpi_status status; |
| 1074 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | |
| 1076 | ret = acpi_ec_get_real_ecdt(); |
| 1077 | /* Try to make a fake ECDT */ |
| 1078 | if (ret && acpi_fake_ecdt_enabled) { |
| 1079 | ret = acpi_ec_fake_ecdt(); |
| 1080 | } |
| 1081 | |
| 1082 | if (ret) |
| 1083 | return 0; |
| 1084 | |
| 1085 | /* |
| 1086 | * Install GPE handler |
| 1087 | */ |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1088 | status = acpi_install_gpe_handler(NULL, ec_ecdt->gpe_bit, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1089 | ACPI_GPE_EDGE_TRIGGERED, |
| 1090 | &acpi_ec_gpe_handler, ec_ecdt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | if (ACPI_FAILURE(status)) { |
| 1092 | goto error; |
| 1093 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1094 | acpi_set_gpe_type(NULL, ec_ecdt->gpe_bit, ACPI_GPE_TYPE_RUNTIME); |
| 1095 | acpi_enable_gpe(NULL, ec_ecdt->gpe_bit, ACPI_NOT_ISR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1097 | status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT, |
| 1098 | ACPI_ADR_SPACE_EC, |
| 1099 | &acpi_ec_space_handler, |
| 1100 | &acpi_ec_space_setup, |
| 1101 | ec_ecdt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | if (ACPI_FAILURE(status)) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1103 | acpi_remove_gpe_handler(NULL, ec_ecdt->gpe_bit, |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1104 | &acpi_ec_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | goto error; |
| 1106 | } |
| 1107 | |
| 1108 | return 0; |
| 1109 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1110 | error: |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1111 | ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | kfree(ec_ecdt); |
| 1113 | ec_ecdt = NULL; |
| 1114 | |
| 1115 | return -ENODEV; |
| 1116 | } |
| 1117 | |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1118 | static int __init acpi_ec_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | { |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1120 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | |
| 1123 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1124 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | |
| 1126 | acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir); |
| 1127 | if (!acpi_ec_dir) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1128 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | |
| 1130 | /* Now register the driver for the EC */ |
| 1131 | result = acpi_bus_register_driver(&acpi_ec_driver); |
| 1132 | if (result < 0) { |
| 1133 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1134 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | } |
| 1136 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1137 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | } |
| 1139 | |
| 1140 | subsys_initcall(acpi_ec_init); |
| 1141 | |
| 1142 | /* EC driver currently not unloadable */ |
| 1143 | #if 0 |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1144 | static void __exit acpi_ec_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | |
| 1147 | acpi_bus_unregister_driver(&acpi_ec_driver); |
| 1148 | |
| 1149 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); |
| 1150 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1151 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1153 | #endif /* 0 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | |
| 1155 | static int __init acpi_fake_ecdt_setup(char *str) |
| 1156 | { |
| 1157 | acpi_fake_ecdt_enabled = 1; |
OGAWA Hirofumi | 9b41046 | 2006-03-31 02:30:33 -0800 | [diff] [blame] | 1158 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | } |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | __setup("acpi_fake_ecdt", acpi_fake_ecdt_setup); |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 1162 | static int __init acpi_ec_set_intr_mode(char *str) |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1163 | { |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 1164 | int intr; |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1165 | |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 1166 | if (!get_option(&str, &intr)) |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1167 | return 0; |
| 1168 | |
Len Brown | 02b28a3 | 2005-12-05 16:33:04 -0500 | [diff] [blame] | 1169 | if (intr) { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1170 | acpi_ec_mode = EC_INTR; |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1171 | } else { |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1172 | acpi_ec_mode = EC_POLL; |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1173 | } |
Denis M. Sadykov | 703959d | 2006-09-26 19:50:33 +0400 | [diff] [blame] | 1174 | acpi_ec_driver.ops.add = acpi_ec_add; |
| 1175 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "EC %s mode.\n", intr ? "interrupt" : "polling")); |
| 1176 | |
OGAWA Hirofumi | 9b41046 | 2006-03-31 02:30:33 -0800 | [diff] [blame] | 1177 | return 1; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1178 | } |
Len Brown | 50526df | 2005-08-11 17:32:05 -0400 | [diff] [blame] | 1179 | |
Len Brown | 53f11d4 | 2005-12-05 16:46:36 -0500 | [diff] [blame] | 1180 | __setup("ec_intr=", acpi_ec_set_intr_mode); |