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 |
| 41 | ACPI_MODULE_NAME ("acpi_ec") |
| 42 | |
| 43 | #define ACPI_EC_COMPONENT 0x00100000 |
| 44 | #define ACPI_EC_CLASS "embedded_controller" |
| 45 | #define ACPI_EC_HID "PNP0C09" |
| 46 | #define ACPI_EC_DRIVER_NAME "ACPI Embedded Controller Driver" |
| 47 | #define ACPI_EC_DEVICE_NAME "Embedded Controller" |
| 48 | #define ACPI_EC_FILE_INFO "info" |
| 49 | |
| 50 | |
| 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 */ |
| 55 | |
| 56 | #define ACPI_EC_EVENT_OBF 0x01 /* Output buffer full */ |
| 57 | #define ACPI_EC_EVENT_IBE 0x02 /* Input buffer empty */ |
| 58 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 59 | #define ACPI_EC_DELAY 50 /* Wait 50ms max. during EC ops */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | #define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ |
| 61 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 62 | #define ACPI_EC_UDELAY 100 /* Poll @ 100us increments */ |
| 63 | #define ACPI_EC_UDELAY_COUNT 1000 /* Wait 10ms max. during EC ops */ |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #define ACPI_EC_COMMAND_READ 0x80 |
| 66 | #define ACPI_EC_COMMAND_WRITE 0x81 |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 67 | #define ACPI_EC_BURST_ENABLE 0x82 |
| 68 | #define ACPI_EC_BURST_DISABLE 0x83 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #define ACPI_EC_COMMAND_QUERY 0x84 |
| 70 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 71 | #define EC_POLLING 0xFF |
| 72 | #define EC_BURST 0x00 |
| 73 | |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | static int acpi_ec_remove (struct acpi_device *device, int type); |
| 76 | static int acpi_ec_start (struct acpi_device *device); |
| 77 | static int acpi_ec_stop (struct acpi_device *device, int type); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 78 | static int acpi_ec_burst_add ( struct acpi_device *device); |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 79 | static int acpi_ec_polling_add ( struct acpi_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
| 81 | static struct acpi_driver acpi_ec_driver = { |
| 82 | .name = ACPI_EC_DRIVER_NAME, |
| 83 | .class = ACPI_EC_CLASS, |
| 84 | .ids = ACPI_EC_HID, |
| 85 | .ops = { |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 86 | .add = acpi_ec_polling_add, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | .remove = acpi_ec_remove, |
| 88 | .start = acpi_ec_start, |
| 89 | .stop = acpi_ec_stop, |
| 90 | }, |
| 91 | }; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 92 | union acpi_ec { |
| 93 | struct { |
| 94 | u32 mode; |
| 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 | } common; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 104 | struct { |
| 105 | u32 mode; |
| 106 | acpi_handle handle; |
| 107 | unsigned long uid; |
| 108 | unsigned long gpe_bit; |
| 109 | struct acpi_generic_address status_addr; |
| 110 | struct acpi_generic_address command_addr; |
| 111 | struct acpi_generic_address data_addr; |
| 112 | unsigned long global_lock; |
| 113 | unsigned int expect_event; |
| 114 | atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort*/ |
| 115 | atomic_t pending_gpe; |
| 116 | struct semaphore sem; |
| 117 | wait_queue_head_t wait; |
| 118 | }burst; |
| 119 | |
| 120 | struct { |
| 121 | u32 mode; |
| 122 | acpi_handle handle; |
| 123 | unsigned long uid; |
| 124 | unsigned long gpe_bit; |
| 125 | struct acpi_generic_address status_addr; |
| 126 | struct acpi_generic_address command_addr; |
| 127 | struct acpi_generic_address data_addr; |
| 128 | unsigned long global_lock; |
| 129 | spinlock_t lock; |
| 130 | }polling; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | }; |
| 132 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 133 | static int acpi_ec_polling_wait ( union acpi_ec *ec, u8 event); |
| 134 | static int acpi_ec_burst_wait(union acpi_ec *ec, unsigned int event); |
| 135 | static int acpi_ec_polling_read ( union acpi_ec *ec, u8 address, u32 *data); |
| 136 | static int acpi_ec_burst_read( union acpi_ec *ec, u8 address, u32 *data); |
| 137 | static int acpi_ec_polling_write ( union acpi_ec *ec, u8 address, u8 data); |
| 138 | static int acpi_ec_burst_write ( union acpi_ec *ec, u8 address, u8 data); |
| 139 | static int acpi_ec_polling_query ( union acpi_ec *ec, u32 *data); |
| 140 | static int acpi_ec_burst_query ( union acpi_ec *ec, u32 *data); |
| 141 | static void acpi_ec_gpe_polling_query ( void *ec_cxt); |
| 142 | static void acpi_ec_gpe_burst_query ( void *ec_cxt); |
| 143 | static u32 acpi_ec_gpe_polling_handler ( void *data); |
| 144 | static u32 acpi_ec_gpe_burst_handler ( void *data); |
| 145 | static acpi_status __init |
| 146 | acpi_fake_ecdt_polling_callback ( |
| 147 | acpi_handle handle, |
| 148 | u32 Level, |
| 149 | void *context, |
| 150 | void **retval); |
| 151 | |
| 152 | static acpi_status __init |
| 153 | acpi_fake_ecdt_burst_callback ( |
| 154 | acpi_handle handle, |
| 155 | u32 Level, |
| 156 | void *context, |
| 157 | void **retval); |
| 158 | |
| 159 | static int __init |
| 160 | acpi_ec_polling_get_real_ecdt(void); |
| 161 | static int __init |
| 162 | acpi_ec_burst_get_real_ecdt(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | /* If we find an EC via the ECDT, we need to keep a ptr to its context */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 164 | static union acpi_ec *ec_ecdt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
| 166 | /* External interfaces use first EC only, so remember */ |
| 167 | static struct acpi_device *first_ec; |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 168 | static int acpi_ec_polling_mode = EC_POLLING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | /* -------------------------------------------------------------------------- |
| 171 | Transaction Management |
| 172 | -------------------------------------------------------------------------- */ |
| 173 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 174 | static inline u32 acpi_ec_read_status(union acpi_ec *ec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | { |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 176 | u32 status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 178 | acpi_hw_low_level_read(8, &status, &ec->common.status_addr); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 179 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | } |
| 181 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 182 | static int |
| 183 | acpi_ec_wait ( |
| 184 | union acpi_ec *ec, |
| 185 | u8 event) |
| 186 | { |
| 187 | if (acpi_ec_polling_mode) |
| 188 | return acpi_ec_polling_wait (ec, event); |
| 189 | else |
| 190 | return acpi_ec_burst_wait (ec, event); |
| 191 | } |
| 192 | |
| 193 | static int |
| 194 | acpi_ec_polling_wait ( |
| 195 | union acpi_ec *ec, |
| 196 | u8 event) |
| 197 | { |
| 198 | u32 acpi_ec_status = 0; |
| 199 | u32 i = ACPI_EC_UDELAY_COUNT; |
| 200 | |
| 201 | if (!ec) |
| 202 | return -EINVAL; |
| 203 | |
| 204 | /* Poll the EC status register waiting for the event to occur. */ |
| 205 | switch (event) { |
| 206 | case ACPI_EC_EVENT_OBF: |
| 207 | do { |
| 208 | acpi_hw_low_level_read(8, &acpi_ec_status, &ec->common.status_addr); |
| 209 | if (acpi_ec_status & ACPI_EC_FLAG_OBF) |
| 210 | return 0; |
| 211 | udelay(ACPI_EC_UDELAY); |
| 212 | } while (--i>0); |
| 213 | break; |
| 214 | case ACPI_EC_EVENT_IBE: |
| 215 | do { |
| 216 | acpi_hw_low_level_read(8, &acpi_ec_status, &ec->common.status_addr); |
| 217 | if (!(acpi_ec_status & ACPI_EC_FLAG_IBF)) |
| 218 | return 0; |
| 219 | udelay(ACPI_EC_UDELAY); |
| 220 | } while (--i>0); |
| 221 | break; |
| 222 | default: |
| 223 | return -EINVAL; |
| 224 | } |
| 225 | |
| 226 | return -ETIME; |
| 227 | } |
| 228 | static int acpi_ec_burst_wait(union acpi_ec *ec, unsigned int event) |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 229 | { |
| 230 | int result = 0; |
| 231 | |
| 232 | ACPI_FUNCTION_TRACE("acpi_ec_wait"); |
| 233 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 234 | ec->burst.expect_event = event; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 235 | smp_mb(); |
| 236 | |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 237 | switch (event) { |
| 238 | case ACPI_EC_EVENT_OBF: |
| 239 | if (acpi_ec_read_status(ec) & event) { |
| 240 | ec->burst.expect_event = 0; |
| 241 | return_VALUE(0); |
| 242 | } |
| 243 | break; |
| 244 | |
| 245 | case ACPI_EC_EVENT_IBE: |
| 246 | if (~acpi_ec_read_status(ec) & event) { |
| 247 | ec->burst.expect_event = 0; |
| 248 | return_VALUE(0); |
| 249 | } |
| 250 | break; |
| 251 | } |
| 252 | |
| 253 | result = wait_event_timeout(ec->burst.wait, |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 254 | !ec->burst.expect_event, |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 255 | msecs_to_jiffies(ACPI_EC_DELAY)); |
| 256 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 257 | ec->burst.expect_event = 0; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 258 | smp_mb(); |
| 259 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 260 | /* |
| 261 | * Verify that the event in question has actually happened by |
| 262 | * querying EC status. Do the check even if operation timed-out |
| 263 | * to make sure that we did not miss interrupt. |
| 264 | */ |
| 265 | switch (event) { |
| 266 | case ACPI_EC_EVENT_OBF: |
| 267 | if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_OBF) |
| 268 | return_VALUE(0); |
| 269 | break; |
| 270 | |
| 271 | case ACPI_EC_EVENT_IBE: |
| 272 | if (~acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) |
| 273 | return_VALUE(0); |
| 274 | break; |
| 275 | } |
| 276 | |
| 277 | return_VALUE(-ETIME); |
| 278 | } |
| 279 | |
| 280 | |
| 281 | |
| 282 | static int |
| 283 | acpi_ec_enter_burst_mode ( |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 284 | union acpi_ec *ec) |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 285 | { |
| 286 | u32 tmp = 0; |
| 287 | int status = 0; |
| 288 | |
| 289 | ACPI_FUNCTION_TRACE("acpi_ec_enter_burst_mode"); |
| 290 | |
| 291 | status = acpi_ec_read_status(ec); |
| 292 | if (status != -EINVAL && |
| 293 | !(status & ACPI_EC_FLAG_BURST)){ |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 294 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
| 295 | if(status) |
| 296 | goto end; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 297 | acpi_hw_low_level_write(8, ACPI_EC_BURST_ENABLE, &ec->common.command_addr); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 298 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 299 | if (status) |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 300 | return_VALUE(-EINVAL); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 301 | acpi_hw_low_level_read(8, &tmp, &ec->common.data_addr); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 302 | if(tmp != 0x90 ) {/* Burst ACK byte*/ |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 303 | return_VALUE(-EINVAL); |
| 304 | } |
Luming Yu | 668d74c | 2005-07-23 00:26:33 -0400 | [diff] [blame] | 305 | } |
| 306 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 307 | atomic_set(&ec->burst.leaving_burst , 0); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 308 | return_VALUE(0); |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 309 | end: |
| 310 | printk("Error in acpi_ec_wait\n"); |
| 311 | return_VALUE(-1); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 312 | } |
| 313 | |
| 314 | static int |
| 315 | acpi_ec_leave_burst_mode ( |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 316 | union acpi_ec *ec) |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 317 | { |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 318 | |
| 319 | ACPI_FUNCTION_TRACE("acpi_ec_leave_burst_mode"); |
| 320 | |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 321 | atomic_set(&ec->burst.leaving_burst, 1); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 322 | return_VALUE(0); |
| 323 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
| 325 | static int |
| 326 | acpi_ec_read ( |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 327 | union acpi_ec *ec, |
| 328 | u8 address, |
| 329 | u32 *data) |
| 330 | { |
| 331 | if (acpi_ec_polling_mode) |
| 332 | return acpi_ec_polling_read(ec, address, data); |
| 333 | else |
| 334 | return acpi_ec_burst_read(ec, address, data); |
| 335 | } |
| 336 | static int |
| 337 | acpi_ec_write ( |
| 338 | union acpi_ec *ec, |
| 339 | u8 address, |
| 340 | u8 data) |
| 341 | { |
| 342 | if (acpi_ec_polling_mode) |
| 343 | return acpi_ec_polling_write(ec, address, data); |
| 344 | else |
| 345 | return acpi_ec_burst_write(ec, address, data); |
| 346 | } |
| 347 | static int |
| 348 | acpi_ec_polling_read ( |
| 349 | union acpi_ec *ec, |
| 350 | u8 address, |
| 351 | u32 *data) |
| 352 | { |
| 353 | acpi_status status = AE_OK; |
| 354 | int result = 0; |
| 355 | unsigned long flags = 0; |
| 356 | u32 glk = 0; |
| 357 | |
| 358 | ACPI_FUNCTION_TRACE("acpi_ec_read"); |
| 359 | |
| 360 | if (!ec || !data) |
| 361 | return_VALUE(-EINVAL); |
| 362 | |
| 363 | *data = 0; |
| 364 | |
| 365 | if (ec->common.global_lock) { |
| 366 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
| 367 | if (ACPI_FAILURE(status)) |
| 368 | return_VALUE(-ENODEV); |
| 369 | } |
| 370 | |
| 371 | spin_lock_irqsave(&ec->polling.lock, flags); |
| 372 | |
| 373 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, &ec->common.command_addr); |
| 374 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
| 375 | if (result) |
| 376 | goto end; |
| 377 | |
| 378 | acpi_hw_low_level_write(8, address, &ec->common.data_addr); |
| 379 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); |
| 380 | if (result) |
| 381 | goto end; |
| 382 | |
| 383 | acpi_hw_low_level_read(8, data, &ec->common.data_addr); |
| 384 | |
| 385 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n", |
| 386 | *data, address)); |
| 387 | |
| 388 | end: |
| 389 | spin_unlock_irqrestore(&ec->polling.lock, flags); |
| 390 | |
| 391 | if (ec->common.global_lock) |
| 392 | acpi_release_global_lock(glk); |
| 393 | |
| 394 | return_VALUE(result); |
| 395 | } |
| 396 | |
| 397 | |
| 398 | static int |
| 399 | acpi_ec_polling_write ( |
| 400 | union acpi_ec *ec, |
| 401 | u8 address, |
| 402 | u8 data) |
| 403 | { |
| 404 | int result = 0; |
| 405 | acpi_status status = AE_OK; |
| 406 | unsigned long flags = 0; |
| 407 | u32 glk = 0; |
| 408 | |
| 409 | ACPI_FUNCTION_TRACE("acpi_ec_write"); |
| 410 | |
| 411 | if (!ec) |
| 412 | return_VALUE(-EINVAL); |
| 413 | |
| 414 | if (ec->common.global_lock) { |
| 415 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
| 416 | if (ACPI_FAILURE(status)) |
| 417 | return_VALUE(-ENODEV); |
| 418 | } |
| 419 | |
| 420 | spin_lock_irqsave(&ec->polling.lock, flags); |
| 421 | |
| 422 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, &ec->common.command_addr); |
| 423 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
| 424 | if (result) |
| 425 | goto end; |
| 426 | |
| 427 | acpi_hw_low_level_write(8, address, &ec->common.data_addr); |
| 428 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
| 429 | if (result) |
| 430 | goto end; |
| 431 | |
| 432 | acpi_hw_low_level_write(8, data, &ec->common.data_addr); |
| 433 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
| 434 | if (result) |
| 435 | goto end; |
| 436 | |
| 437 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n", |
| 438 | data, address)); |
| 439 | |
| 440 | end: |
| 441 | spin_unlock_irqrestore(&ec->polling.lock, flags); |
| 442 | |
| 443 | if (ec->common.global_lock) |
| 444 | acpi_release_global_lock(glk); |
| 445 | |
| 446 | return_VALUE(result); |
| 447 | } |
| 448 | |
| 449 | static int |
| 450 | acpi_ec_burst_read ( |
| 451 | union acpi_ec *ec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | u8 address, |
| 453 | u32 *data) |
| 454 | { |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 455 | int status = 0; |
| 456 | u32 glk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
| 458 | ACPI_FUNCTION_TRACE("acpi_ec_read"); |
| 459 | |
| 460 | if (!ec || !data) |
| 461 | return_VALUE(-EINVAL); |
| 462 | |
| 463 | *data = 0; |
| 464 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 465 | if (ec->common.global_lock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
| 467 | if (ACPI_FAILURE(status)) |
| 468 | return_VALUE(-ENODEV); |
| 469 | } |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 470 | |
| 471 | WARN_ON(in_interrupt()); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 472 | down(&ec->burst.sem); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 473 | |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 474 | acpi_ec_enter_burst_mode(ec); |
| 475 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
| 476 | if (status) { |
| 477 | printk("read EC, IB not empty\n"); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 478 | goto end; |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 479 | } |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 480 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, &ec->common.command_addr); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 481 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 482 | if (status) { |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 483 | printk("read EC, IB not empty\n"); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 484 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 486 | acpi_hw_low_level_write(8, address, &ec->common.data_addr); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 487 | status= acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); |
| 488 | if (status){ |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 489 | printk("read EC, OB not full\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | goto end; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 491 | } |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 492 | acpi_hw_low_level_read(8, data, &ec->common.data_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n", |
| 494 | *data, address)); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | end: |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 497 | acpi_ec_leave_burst_mode(ec); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 498 | up(&ec->burst.sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 500 | if (ec->common.global_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | acpi_release_global_lock(glk); |
| 502 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 503 | return_VALUE(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | } |
| 505 | |
| 506 | |
| 507 | static int |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 508 | acpi_ec_burst_write ( |
| 509 | union acpi_ec *ec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | u8 address, |
| 511 | u8 data) |
| 512 | { |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 513 | int status = 0; |
| 514 | u32 glk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
| 516 | ACPI_FUNCTION_TRACE("acpi_ec_write"); |
| 517 | |
| 518 | if (!ec) |
| 519 | return_VALUE(-EINVAL); |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 520 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 521 | if (ec->common.global_lock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
| 523 | if (ACPI_FAILURE(status)) |
| 524 | return_VALUE(-ENODEV); |
| 525 | } |
| 526 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 527 | WARN_ON(in_interrupt()); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 528 | down(&ec->burst.sem); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 529 | |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 530 | acpi_ec_enter_burst_mode(ec); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 531 | |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 532 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
| 533 | if ( status) { |
| 534 | printk("write EC, IB not empty\n"); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 535 | } |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 536 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, &ec->common.command_addr); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 537 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 538 | if (status) { |
| 539 | printk ("write EC, IB not empty\n"); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 540 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 542 | acpi_hw_low_level_write(8, address, &ec->common.data_addr); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 543 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
| 544 | if (status){ |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 545 | printk("write EC, IB not empty\n"); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 546 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 548 | acpi_hw_low_level_write(8, data, &ec->common.data_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
| 550 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n", |
| 551 | data, address)); |
| 552 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 553 | acpi_ec_leave_burst_mode(ec); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 554 | up(&ec->burst.sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 556 | if (ec->common.global_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | acpi_release_global_lock(glk); |
| 558 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 559 | return_VALUE(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | /* |
| 563 | * Externally callable EC access functions. For now, assume 1 EC only |
| 564 | */ |
| 565 | int |
| 566 | ec_read(u8 addr, u8 *val) |
| 567 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 568 | union acpi_ec *ec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | int err; |
| 570 | u32 temp_data; |
| 571 | |
| 572 | if (!first_ec) |
| 573 | return -ENODEV; |
| 574 | |
| 575 | ec = acpi_driver_data(first_ec); |
| 576 | |
| 577 | err = acpi_ec_read(ec, addr, &temp_data); |
| 578 | |
| 579 | if (!err) { |
| 580 | *val = temp_data; |
| 581 | return 0; |
| 582 | } |
| 583 | else |
| 584 | return err; |
| 585 | } |
| 586 | EXPORT_SYMBOL(ec_read); |
| 587 | |
| 588 | int |
| 589 | ec_write(u8 addr, u8 val) |
| 590 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 591 | union acpi_ec *ec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | int err; |
| 593 | |
| 594 | if (!first_ec) |
| 595 | return -ENODEV; |
| 596 | |
| 597 | ec = acpi_driver_data(first_ec); |
| 598 | |
| 599 | err = acpi_ec_write(ec, addr, val); |
| 600 | |
| 601 | return err; |
| 602 | } |
| 603 | EXPORT_SYMBOL(ec_write); |
| 604 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | static int |
| 606 | acpi_ec_query ( |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 607 | union acpi_ec *ec, |
| 608 | u32 *data) |
| 609 | { |
| 610 | if (acpi_ec_polling_mode) |
| 611 | return acpi_ec_polling_query(ec, data); |
| 612 | else |
| 613 | return acpi_ec_burst_query(ec, data); |
| 614 | } |
| 615 | static int |
| 616 | acpi_ec_polling_query ( |
| 617 | union acpi_ec *ec, |
| 618 | u32 *data) |
| 619 | { |
| 620 | int result = 0; |
| 621 | acpi_status status = AE_OK; |
| 622 | unsigned long flags = 0; |
| 623 | u32 glk = 0; |
| 624 | |
| 625 | ACPI_FUNCTION_TRACE("acpi_ec_query"); |
| 626 | |
| 627 | if (!ec || !data) |
| 628 | return_VALUE(-EINVAL); |
| 629 | |
| 630 | *data = 0; |
| 631 | |
| 632 | if (ec->common.global_lock) { |
| 633 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
| 634 | if (ACPI_FAILURE(status)) |
| 635 | return_VALUE(-ENODEV); |
| 636 | } |
| 637 | |
| 638 | /* |
| 639 | * Query the EC to find out which _Qxx method we need to evaluate. |
| 640 | * Note that successful completion of the query causes the ACPI_EC_SCI |
| 641 | * bit to be cleared (and thus clearing the interrupt source). |
| 642 | */ |
| 643 | spin_lock_irqsave(&ec->polling.lock, flags); |
| 644 | |
| 645 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, &ec->common.command_addr); |
| 646 | result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); |
| 647 | if (result) |
| 648 | goto end; |
| 649 | |
| 650 | acpi_hw_low_level_read(8, data, &ec->common.data_addr); |
| 651 | if (!*data) |
| 652 | result = -ENODATA; |
| 653 | |
| 654 | end: |
| 655 | spin_unlock_irqrestore(&ec->polling.lock, flags); |
| 656 | |
| 657 | if (ec->common.global_lock) |
| 658 | acpi_release_global_lock(glk); |
| 659 | |
| 660 | return_VALUE(result); |
| 661 | } |
| 662 | static int |
| 663 | acpi_ec_burst_query ( |
| 664 | union acpi_ec *ec, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | u32 *data) |
| 666 | { |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 667 | int status = 0; |
| 668 | u32 glk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | |
| 670 | ACPI_FUNCTION_TRACE("acpi_ec_query"); |
| 671 | |
| 672 | if (!ec || !data) |
| 673 | return_VALUE(-EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | *data = 0; |
| 675 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 676 | if (ec->common.global_lock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); |
| 678 | if (ACPI_FAILURE(status)) |
| 679 | return_VALUE(-ENODEV); |
| 680 | } |
| 681 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 682 | down(&ec->burst.sem); |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 683 | |
| 684 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); |
| 685 | if (status) { |
| 686 | printk("query EC, IB not empty\n"); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 687 | goto end; |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 688 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | /* |
| 690 | * Query the EC to find out which _Qxx method we need to evaluate. |
| 691 | * Note that successful completion of the query causes the ACPI_EC_SCI |
| 692 | * bit to be cleared (and thus clearing the interrupt source). |
| 693 | */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 694 | acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, &ec->common.command_addr); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 695 | status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); |
| 696 | if (status){ |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 697 | printk("query EC, OB not full\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | goto end; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 699 | } |
| 700 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 701 | acpi_hw_low_level_read(8, data, &ec->common.data_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | if (!*data) |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 703 | status = -ENODATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | |
| 705 | end: |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 706 | up(&ec->burst.sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 708 | if (ec->common.global_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | acpi_release_global_lock(glk); |
| 710 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 711 | return_VALUE(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | } |
| 713 | |
| 714 | |
| 715 | /* -------------------------------------------------------------------------- |
| 716 | Event Management |
| 717 | -------------------------------------------------------------------------- */ |
| 718 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 719 | union acpi_ec_query_data { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | acpi_handle handle; |
| 721 | u8 data; |
| 722 | }; |
| 723 | |
| 724 | static void |
| 725 | acpi_ec_gpe_query ( |
| 726 | void *ec_cxt) |
| 727 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 728 | if (acpi_ec_polling_mode) |
| 729 | acpi_ec_gpe_polling_query(ec_cxt); |
| 730 | else |
| 731 | acpi_ec_gpe_burst_query(ec_cxt); |
| 732 | } |
| 733 | |
| 734 | static void |
| 735 | acpi_ec_gpe_polling_query ( |
| 736 | void *ec_cxt) |
| 737 | { |
| 738 | union acpi_ec *ec = (union acpi_ec *) ec_cxt; |
| 739 | u32 value = 0; |
| 740 | unsigned long flags = 0; |
| 741 | static char object_name[5] = {'_','Q','0','0','\0'}; |
| 742 | const char hex[] = {'0','1','2','3','4','5','6','7', |
| 743 | '8','9','A','B','C','D','E','F'}; |
| 744 | |
| 745 | ACPI_FUNCTION_TRACE("acpi_ec_gpe_query"); |
| 746 | |
| 747 | if (!ec_cxt) |
| 748 | goto end; |
| 749 | |
| 750 | spin_lock_irqsave(&ec->polling.lock, flags); |
| 751 | acpi_hw_low_level_read(8, &value, &ec->common.command_addr); |
| 752 | spin_unlock_irqrestore(&ec->polling.lock, flags); |
| 753 | |
| 754 | /* TBD: Implement asynch events! |
| 755 | * NOTE: All we care about are EC-SCI's. Other EC events are |
| 756 | * handled via polling (yuck!). This is because some systems |
| 757 | * treat EC-SCIs as level (versus EDGE!) triggered, preventing |
| 758 | * a purely interrupt-driven approach (grumble, grumble). |
| 759 | */ |
| 760 | if (!(value & ACPI_EC_FLAG_SCI)) |
| 761 | goto end; |
| 762 | |
| 763 | if (acpi_ec_query(ec, &value)) |
| 764 | goto end; |
| 765 | |
| 766 | object_name[2] = hex[((value >> 4) & 0x0F)]; |
| 767 | object_name[3] = hex[(value & 0x0F)]; |
| 768 | |
| 769 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name)); |
| 770 | |
| 771 | acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL); |
| 772 | |
| 773 | end: |
| 774 | acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); |
| 775 | } |
| 776 | static void |
| 777 | acpi_ec_gpe_burst_query ( |
| 778 | void *ec_cxt) |
| 779 | { |
| 780 | union acpi_ec *ec = (union acpi_ec *) ec_cxt; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 781 | u32 value; |
| 782 | int result = -ENODATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | static char object_name[5] = {'_','Q','0','0','\0'}; |
| 784 | const char hex[] = {'0','1','2','3','4','5','6','7', |
| 785 | '8','9','A','B','C','D','E','F'}; |
| 786 | |
| 787 | ACPI_FUNCTION_TRACE("acpi_ec_gpe_query"); |
| 788 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 789 | if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI) |
| 790 | result = acpi_ec_query(ec, &value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 792 | if (result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | goto end; |
| 794 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | object_name[2] = hex[((value >> 4) & 0x0F)]; |
| 796 | object_name[3] = hex[(value & 0x0F)]; |
| 797 | |
| 798 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name)); |
| 799 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 800 | acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 801 | end: |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 802 | atomic_dec(&ec->burst.pending_gpe); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 803 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | } |
| 805 | |
| 806 | static u32 |
| 807 | acpi_ec_gpe_handler ( |
| 808 | void *data) |
| 809 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 810 | if (acpi_ec_polling_mode) |
| 811 | return acpi_ec_gpe_polling_handler(data); |
| 812 | else |
| 813 | return acpi_ec_gpe_burst_handler(data); |
| 814 | } |
| 815 | static u32 |
| 816 | acpi_ec_gpe_polling_handler ( |
| 817 | void *data) |
| 818 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | acpi_status status = AE_OK; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 820 | union acpi_ec *ec = (union acpi_ec *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | |
| 822 | if (!ec) |
| 823 | return ACPI_INTERRUPT_NOT_HANDLED; |
| 824 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 825 | acpi_disable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); |
| 826 | |
| 827 | status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE, |
| 828 | acpi_ec_gpe_query, ec); |
| 829 | |
| 830 | if (status == AE_OK) |
| 831 | return ACPI_INTERRUPT_HANDLED; |
| 832 | else |
| 833 | return ACPI_INTERRUPT_NOT_HANDLED; |
| 834 | } |
| 835 | static u32 |
| 836 | acpi_ec_gpe_burst_handler ( |
| 837 | void *data) |
| 838 | { |
| 839 | acpi_status status = AE_OK; |
| 840 | u32 value; |
| 841 | union acpi_ec *ec = (union acpi_ec *) data; |
| 842 | |
| 843 | if (!ec) |
| 844 | return ACPI_INTERRUPT_NOT_HANDLED; |
| 845 | |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 846 | acpi_clear_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 847 | value = acpi_ec_read_status(ec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 849 | switch ( ec->burst.expect_event) { |
| 850 | case ACPI_EC_EVENT_OBF: |
| 851 | if (!(value & ACPI_EC_FLAG_OBF)) |
| 852 | break; |
| 853 | case ACPI_EC_EVENT_IBE: |
| 854 | if ((value & ACPI_EC_FLAG_IBF)) |
| 855 | break; |
| 856 | ec->burst.expect_event = 0; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 857 | wake_up(&ec->burst.wait); |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 858 | return ACPI_INTERRUPT_HANDLED; |
| 859 | default: |
| 860 | break; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 861 | } |
| 862 | |
| 863 | if (value & ACPI_EC_FLAG_SCI){ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 864 | atomic_add(1, &ec->burst.pending_gpe) ; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 865 | status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE, |
| 866 | acpi_ec_gpe_query, ec); |
Luming Yu | 17e9c78 | 2005-04-22 23:07:10 -0400 | [diff] [blame] | 867 | return status == AE_OK ? |
| 868 | ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 869 | } |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 870 | acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 871 | return status == AE_OK ? |
| 872 | ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | } |
| 874 | |
| 875 | /* -------------------------------------------------------------------------- |
| 876 | Address Space Management |
| 877 | -------------------------------------------------------------------------- */ |
| 878 | |
| 879 | static acpi_status |
| 880 | acpi_ec_space_setup ( |
| 881 | acpi_handle region_handle, |
| 882 | u32 function, |
| 883 | void *handler_context, |
| 884 | void **return_context) |
| 885 | { |
| 886 | /* |
| 887 | * The EC object is in the handler context and is needed |
| 888 | * when calling the acpi_ec_space_handler. |
| 889 | */ |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 890 | *return_context = (function != ACPI_REGION_DEACTIVATE) ? |
| 891 | handler_context : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | |
| 893 | return AE_OK; |
| 894 | } |
| 895 | |
| 896 | |
| 897 | static acpi_status |
| 898 | acpi_ec_space_handler ( |
| 899 | u32 function, |
| 900 | acpi_physical_address address, |
| 901 | u32 bit_width, |
| 902 | acpi_integer *value, |
| 903 | void *handler_context, |
| 904 | void *region_context) |
| 905 | { |
| 906 | int result = 0; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 907 | union acpi_ec *ec = NULL; |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 908 | u64 temp = *value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | acpi_integer f_v = 0; |
| 910 | int i = 0; |
| 911 | |
| 912 | ACPI_FUNCTION_TRACE("acpi_ec_space_handler"); |
| 913 | |
| 914 | if ((address > 0xFF) || !value || !handler_context) |
| 915 | return_VALUE(AE_BAD_PARAMETER); |
| 916 | |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 917 | if (bit_width != 8 && acpi_strict) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | printk(KERN_WARNING PREFIX "acpi_ec_space_handler: bit_width should be 8\n"); |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 919 | return_VALUE(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | } |
| 921 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 922 | ec = (union acpi_ec *) handler_context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | |
| 924 | next_byte: |
| 925 | switch (function) { |
| 926 | case ACPI_READ: |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 927 | temp = 0; |
| 928 | result = acpi_ec_read(ec, (u8) address, (u32 *)&temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | break; |
| 930 | case ACPI_WRITE: |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 931 | result = acpi_ec_write(ec, (u8) address, (u8) temp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | break; |
| 933 | default: |
| 934 | result = -EINVAL; |
| 935 | goto out; |
| 936 | break; |
| 937 | } |
| 938 | |
| 939 | bit_width -= 8; |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 940 | if (bit_width) { |
| 941 | if (function == ACPI_READ) |
| 942 | f_v |= temp << 8 * i; |
| 943 | if (function == ACPI_WRITE) |
| 944 | temp >>= 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | i++; |
Andrew Morton | 83ea744 | 2005-03-30 22:12:13 -0500 | [diff] [blame] | 946 | address++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | goto next_byte; |
| 948 | } |
| 949 | |
Luming Yu | fa9cd54 | 2005-03-19 01:54:47 -0500 | [diff] [blame] | 950 | if (function == ACPI_READ) { |
| 951 | f_v |= temp << 8 * i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | *value = f_v; |
| 953 | } |
| 954 | |
| 955 | |
| 956 | out: |
| 957 | switch (result) { |
| 958 | case -EINVAL: |
| 959 | return_VALUE(AE_BAD_PARAMETER); |
| 960 | break; |
| 961 | case -ENODEV: |
| 962 | return_VALUE(AE_NOT_FOUND); |
| 963 | break; |
| 964 | case -ETIME: |
| 965 | return_VALUE(AE_TIME); |
| 966 | break; |
| 967 | default: |
| 968 | return_VALUE(AE_OK); |
| 969 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | } |
| 971 | |
| 972 | |
| 973 | /* -------------------------------------------------------------------------- |
| 974 | FS Interface (/proc) |
| 975 | -------------------------------------------------------------------------- */ |
| 976 | |
| 977 | static struct proc_dir_entry *acpi_ec_dir; |
| 978 | |
| 979 | |
| 980 | static int |
| 981 | acpi_ec_read_info (struct seq_file *seq, void *offset) |
| 982 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 983 | union acpi_ec *ec = (union acpi_ec *) seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | |
| 985 | ACPI_FUNCTION_TRACE("acpi_ec_read_info"); |
| 986 | |
| 987 | if (!ec) |
| 988 | goto end; |
| 989 | |
| 990 | seq_printf(seq, "gpe bit: 0x%02x\n", |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 991 | (u32) ec->common.gpe_bit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | seq_printf(seq, "ports: 0x%02x, 0x%02x\n", |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 993 | (u32) ec->common.status_addr.address, (u32) ec->common.data_addr.address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | seq_printf(seq, "use global lock: %s\n", |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 995 | ec->common.global_lock?"yes":"no"); |
| 996 | acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | |
| 998 | end: |
| 999 | return_VALUE(0); |
| 1000 | } |
| 1001 | |
| 1002 | static int acpi_ec_info_open_fs(struct inode *inode, struct file *file) |
| 1003 | { |
| 1004 | return single_open(file, acpi_ec_read_info, PDE(inode)->data); |
| 1005 | } |
| 1006 | |
| 1007 | static struct file_operations acpi_ec_info_ops = { |
| 1008 | .open = acpi_ec_info_open_fs, |
| 1009 | .read = seq_read, |
| 1010 | .llseek = seq_lseek, |
| 1011 | .release = single_release, |
| 1012 | .owner = THIS_MODULE, |
| 1013 | }; |
| 1014 | |
| 1015 | static int |
| 1016 | acpi_ec_add_fs ( |
| 1017 | struct acpi_device *device) |
| 1018 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1019 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
| 1021 | ACPI_FUNCTION_TRACE("acpi_ec_add_fs"); |
| 1022 | |
| 1023 | if (!acpi_device_dir(device)) { |
| 1024 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
| 1025 | acpi_ec_dir); |
| 1026 | if (!acpi_device_dir(device)) |
| 1027 | return_VALUE(-ENODEV); |
| 1028 | } |
| 1029 | |
| 1030 | entry = create_proc_entry(ACPI_EC_FILE_INFO, S_IRUGO, |
| 1031 | acpi_device_dir(device)); |
| 1032 | if (!entry) |
| 1033 | ACPI_DEBUG_PRINT((ACPI_DB_WARN, |
| 1034 | "Unable to create '%s' fs entry\n", |
| 1035 | ACPI_EC_FILE_INFO)); |
| 1036 | else { |
| 1037 | entry->proc_fops = &acpi_ec_info_ops; |
| 1038 | entry->data = acpi_driver_data(device); |
| 1039 | entry->owner = THIS_MODULE; |
| 1040 | } |
| 1041 | |
| 1042 | return_VALUE(0); |
| 1043 | } |
| 1044 | |
| 1045 | |
| 1046 | static int |
| 1047 | acpi_ec_remove_fs ( |
| 1048 | struct acpi_device *device) |
| 1049 | { |
| 1050 | ACPI_FUNCTION_TRACE("acpi_ec_remove_fs"); |
| 1051 | |
| 1052 | if (acpi_device_dir(device)) { |
| 1053 | remove_proc_entry(ACPI_EC_FILE_INFO, acpi_device_dir(device)); |
| 1054 | remove_proc_entry(acpi_device_bid(device), acpi_ec_dir); |
| 1055 | acpi_device_dir(device) = NULL; |
| 1056 | } |
| 1057 | |
| 1058 | return_VALUE(0); |
| 1059 | } |
| 1060 | |
| 1061 | |
| 1062 | /* -------------------------------------------------------------------------- |
| 1063 | Driver Interface |
| 1064 | -------------------------------------------------------------------------- */ |
| 1065 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1066 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | static int |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1068 | acpi_ec_polling_add ( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | struct acpi_device *device) |
| 1070 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1071 | int result = 0; |
| 1072 | acpi_status status = AE_OK; |
| 1073 | union acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | unsigned long uid; |
| 1075 | |
| 1076 | ACPI_FUNCTION_TRACE("acpi_ec_add"); |
| 1077 | |
| 1078 | if (!device) |
| 1079 | return_VALUE(-EINVAL); |
| 1080 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1081 | ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | if (!ec) |
| 1083 | return_VALUE(-ENOMEM); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1084 | memset(ec, 0, sizeof(union acpi_ec)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1086 | ec->common.handle = device->handle; |
| 1087 | ec->common.uid = -1; |
| 1088 | spin_lock_init(&ec->polling.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); |
| 1090 | strcpy(acpi_device_class(device), ACPI_EC_CLASS); |
| 1091 | acpi_driver_data(device) = ec; |
| 1092 | |
| 1093 | /* Use the global lock for all EC transactions? */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1094 | acpi_evaluate_integer(ec->common.handle, "_GLK", NULL, &ec->common.global_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | |
| 1096 | /* If our UID matches the UID for the ECDT-enumerated EC, |
| 1097 | we now have the *real* EC info, so kill the makeshift one.*/ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1098 | acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid); |
| 1099 | if (ec_ecdt && ec_ecdt->common.uid == uid) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, |
| 1101 | ACPI_ADR_SPACE_EC, &acpi_ec_space_handler); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1102 | |
| 1103 | acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, &acpi_ec_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
| 1105 | kfree(ec_ecdt); |
| 1106 | } |
| 1107 | |
| 1108 | /* Get GPE bit assignment (EC events). */ |
| 1109 | /* TODO: Add support for _GPE returning a package */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1110 | status = acpi_evaluate_integer(ec->common.handle, "_GPE", NULL, &ec->common.gpe_bit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | if (ACPI_FAILURE(status)) { |
| 1112 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 1113 | "Error obtaining GPE bit assignment\n")); |
| 1114 | result = -ENODEV; |
| 1115 | goto end; |
| 1116 | } |
| 1117 | |
| 1118 | result = acpi_ec_add_fs(device); |
| 1119 | if (result) |
| 1120 | goto end; |
| 1121 | |
| 1122 | printk(KERN_INFO PREFIX "%s [%s] (gpe %d)\n", |
| 1123 | acpi_device_name(device), acpi_device_bid(device), |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1124 | (u32) ec->common.gpe_bit); |
| 1125 | |
| 1126 | if (!first_ec) |
| 1127 | first_ec = device; |
| 1128 | |
| 1129 | end: |
| 1130 | if (result) |
| 1131 | kfree(ec); |
| 1132 | |
| 1133 | return_VALUE(result); |
| 1134 | } |
| 1135 | static int |
| 1136 | acpi_ec_burst_add ( |
| 1137 | struct acpi_device *device) |
| 1138 | { |
| 1139 | int result = 0; |
| 1140 | acpi_status status = AE_OK; |
| 1141 | union acpi_ec *ec = NULL; |
| 1142 | unsigned long uid; |
| 1143 | |
| 1144 | ACPI_FUNCTION_TRACE("acpi_ec_add"); |
| 1145 | |
| 1146 | if (!device) |
| 1147 | return_VALUE(-EINVAL); |
| 1148 | |
| 1149 | ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); |
| 1150 | if (!ec) |
| 1151 | return_VALUE(-ENOMEM); |
| 1152 | memset(ec, 0, sizeof(union acpi_ec)); |
| 1153 | |
| 1154 | ec->common.handle = device->handle; |
| 1155 | ec->common.uid = -1; |
| 1156 | atomic_set(&ec->burst.pending_gpe, 0); |
| 1157 | atomic_set(&ec->burst.leaving_burst , 1); |
| 1158 | init_MUTEX(&ec->burst.sem); |
| 1159 | init_waitqueue_head(&ec->burst.wait); |
| 1160 | strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); |
| 1161 | strcpy(acpi_device_class(device), ACPI_EC_CLASS); |
| 1162 | acpi_driver_data(device) = ec; |
| 1163 | |
| 1164 | /* Use the global lock for all EC transactions? */ |
| 1165 | acpi_evaluate_integer(ec->common.handle, "_GLK", NULL, &ec->common.global_lock); |
| 1166 | |
| 1167 | /* If our UID matches the UID for the ECDT-enumerated EC, |
| 1168 | we now have the *real* EC info, so kill the makeshift one.*/ |
| 1169 | acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid); |
| 1170 | if (ec_ecdt && ec_ecdt->common.uid == uid) { |
| 1171 | acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, |
| 1172 | ACPI_ADR_SPACE_EC, &acpi_ec_space_handler); |
| 1173 | |
| 1174 | acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, &acpi_ec_gpe_handler); |
| 1175 | |
| 1176 | kfree(ec_ecdt); |
| 1177 | } |
| 1178 | |
| 1179 | /* Get GPE bit assignment (EC events). */ |
| 1180 | /* TODO: Add support for _GPE returning a package */ |
| 1181 | status = acpi_evaluate_integer(ec->common.handle, "_GPE", NULL, &ec->common.gpe_bit); |
| 1182 | if (ACPI_FAILURE(status)) { |
| 1183 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 1184 | "Error obtaining GPE bit assignment\n")); |
| 1185 | result = -ENODEV; |
| 1186 | goto end; |
| 1187 | } |
| 1188 | |
| 1189 | result = acpi_ec_add_fs(device); |
| 1190 | if (result) |
| 1191 | goto end; |
| 1192 | |
Luming Yu | 716e084 | 2005-08-10 01:40:00 -0400 | [diff] [blame^] | 1193 | printk("burst-mode-ec-10-Aug\n"); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1194 | printk(KERN_INFO PREFIX "%s [%s] (gpe %d)\n", |
| 1195 | acpi_device_name(device), acpi_device_bid(device), |
| 1196 | (u32) ec->common.gpe_bit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | |
| 1198 | if (!first_ec) |
| 1199 | first_ec = device; |
| 1200 | |
| 1201 | end: |
| 1202 | if (result) |
| 1203 | kfree(ec); |
| 1204 | |
| 1205 | return_VALUE(result); |
| 1206 | } |
| 1207 | |
| 1208 | |
| 1209 | static int |
| 1210 | acpi_ec_remove ( |
| 1211 | struct acpi_device *device, |
| 1212 | int type) |
| 1213 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1214 | union acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
| 1216 | ACPI_FUNCTION_TRACE("acpi_ec_remove"); |
| 1217 | |
| 1218 | if (!device) |
| 1219 | return_VALUE(-EINVAL); |
| 1220 | |
| 1221 | ec = acpi_driver_data(device); |
| 1222 | |
| 1223 | acpi_ec_remove_fs(device); |
| 1224 | |
| 1225 | kfree(ec); |
| 1226 | |
| 1227 | return_VALUE(0); |
| 1228 | } |
| 1229 | |
| 1230 | |
| 1231 | static acpi_status |
| 1232 | acpi_ec_io_ports ( |
| 1233 | struct acpi_resource *resource, |
| 1234 | void *context) |
| 1235 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1236 | union acpi_ec *ec = (union acpi_ec *) context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | struct acpi_generic_address *addr; |
| 1238 | |
| 1239 | if (resource->id != ACPI_RSTYPE_IO) { |
| 1240 | return AE_OK; |
| 1241 | } |
| 1242 | |
| 1243 | /* |
| 1244 | * The first address region returned is the data port, and |
| 1245 | * the second address region returned is the status/command |
| 1246 | * port. |
| 1247 | */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1248 | if (ec->common.data_addr.register_bit_width == 0) { |
| 1249 | addr = &ec->common.data_addr; |
| 1250 | } else if (ec->common.command_addr.register_bit_width == 0) { |
| 1251 | addr = &ec->common.command_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | } else { |
| 1253 | return AE_CTRL_TERMINATE; |
| 1254 | } |
| 1255 | |
| 1256 | addr->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO; |
| 1257 | addr->register_bit_width = 8; |
| 1258 | addr->register_bit_offset = 0; |
| 1259 | addr->address = resource->data.io.min_base_address; |
| 1260 | |
| 1261 | return AE_OK; |
| 1262 | } |
| 1263 | |
| 1264 | |
| 1265 | static int |
| 1266 | acpi_ec_start ( |
| 1267 | struct acpi_device *device) |
| 1268 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1269 | acpi_status status = AE_OK; |
| 1270 | union acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | |
| 1272 | ACPI_FUNCTION_TRACE("acpi_ec_start"); |
| 1273 | |
| 1274 | if (!device) |
| 1275 | return_VALUE(-EINVAL); |
| 1276 | |
| 1277 | ec = acpi_driver_data(device); |
| 1278 | |
| 1279 | if (!ec) |
| 1280 | return_VALUE(-EINVAL); |
| 1281 | |
| 1282 | /* |
| 1283 | * Get I/O port addresses. Convert to GAS format. |
| 1284 | */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1285 | status = acpi_walk_resources(ec->common.handle, METHOD_NAME__CRS, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | acpi_ec_io_ports, ec); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1287 | if (ACPI_FAILURE(status) || ec->common.command_addr.register_bit_width == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error getting I/O port addresses")); |
| 1289 | return_VALUE(-ENODEV); |
| 1290 | } |
| 1291 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1292 | ec->common.status_addr = ec->common.command_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | |
| 1294 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x\n", |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1295 | (u32) ec->common.gpe_bit, (u32) ec->common.command_addr.address, |
| 1296 | (u32) ec->common.data_addr.address)); |
| 1297 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | |
| 1299 | /* |
| 1300 | * Install GPE handler |
| 1301 | */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1302 | status = acpi_install_gpe_handler(NULL, ec->common.gpe_bit, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | ACPI_GPE_EDGE_TRIGGERED, &acpi_ec_gpe_handler, ec); |
| 1304 | if (ACPI_FAILURE(status)) { |
| 1305 | return_VALUE(-ENODEV); |
| 1306 | } |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1307 | acpi_set_gpe_type (NULL, ec->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME); |
| 1308 | acpi_enable_gpe (NULL, ec->common.gpe_bit, ACPI_NOT_ISR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1310 | status = acpi_install_address_space_handler (ec->common.handle, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | ACPI_ADR_SPACE_EC, &acpi_ec_space_handler, |
| 1312 | &acpi_ec_space_setup, ec); |
| 1313 | if (ACPI_FAILURE(status)) { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1314 | acpi_remove_gpe_handler(NULL, ec->common.gpe_bit, &acpi_ec_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | return_VALUE(-ENODEV); |
| 1316 | } |
| 1317 | |
| 1318 | return_VALUE(AE_OK); |
| 1319 | } |
| 1320 | |
| 1321 | |
| 1322 | static int |
| 1323 | acpi_ec_stop ( |
| 1324 | struct acpi_device *device, |
| 1325 | int type) |
| 1326 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1327 | acpi_status status = AE_OK; |
| 1328 | union acpi_ec *ec = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | |
| 1330 | ACPI_FUNCTION_TRACE("acpi_ec_stop"); |
| 1331 | |
| 1332 | if (!device) |
| 1333 | return_VALUE(-EINVAL); |
| 1334 | |
| 1335 | ec = acpi_driver_data(device); |
| 1336 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1337 | status = acpi_remove_address_space_handler(ec->common.handle, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | ACPI_ADR_SPACE_EC, &acpi_ec_space_handler); |
| 1339 | if (ACPI_FAILURE(status)) |
| 1340 | return_VALUE(-ENODEV); |
| 1341 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1342 | status = acpi_remove_gpe_handler(NULL, ec->common.gpe_bit, &acpi_ec_gpe_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | if (ACPI_FAILURE(status)) |
| 1344 | return_VALUE(-ENODEV); |
| 1345 | |
| 1346 | return_VALUE(0); |
| 1347 | } |
| 1348 | |
| 1349 | static acpi_status __init |
| 1350 | acpi_fake_ecdt_callback ( |
| 1351 | acpi_handle handle, |
| 1352 | u32 Level, |
| 1353 | void *context, |
| 1354 | void **retval) |
| 1355 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1356 | |
| 1357 | if (acpi_ec_polling_mode) |
| 1358 | return acpi_fake_ecdt_polling_callback(handle, |
| 1359 | Level, context, retval); |
| 1360 | else |
| 1361 | return acpi_fake_ecdt_burst_callback(handle, |
| 1362 | Level, context, retval); |
| 1363 | } |
| 1364 | |
| 1365 | static acpi_status __init |
| 1366 | acpi_fake_ecdt_polling_callback ( |
| 1367 | acpi_handle handle, |
| 1368 | u32 Level, |
| 1369 | void *context, |
| 1370 | void **retval) |
| 1371 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | acpi_status status; |
| 1373 | |
| 1374 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
| 1375 | acpi_ec_io_ports, ec_ecdt); |
| 1376 | if (ACPI_FAILURE(status)) |
| 1377 | return status; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1378 | ec_ecdt->common.status_addr = ec_ecdt->common.command_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1380 | ec_ecdt->common.uid = -1; |
| 1381 | acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1383 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->common.gpe_bit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1384 | if (ACPI_FAILURE(status)) |
| 1385 | return status; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1386 | spin_lock_init(&ec_ecdt->polling.lock); |
| 1387 | ec_ecdt->common.global_lock = TRUE; |
| 1388 | ec_ecdt->common.handle = handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | |
| 1390 | printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n", |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1391 | (u32) ec_ecdt->common.gpe_bit, (u32) ec_ecdt->common.command_addr.address, |
| 1392 | (u32) ec_ecdt->common.data_addr.address); |
| 1393 | |
| 1394 | return AE_CTRL_TERMINATE; |
| 1395 | } |
| 1396 | |
| 1397 | static acpi_status __init |
| 1398 | acpi_fake_ecdt_burst_callback ( |
| 1399 | acpi_handle handle, |
| 1400 | u32 Level, |
| 1401 | void *context, |
| 1402 | void **retval) |
| 1403 | { |
| 1404 | acpi_status status; |
| 1405 | |
| 1406 | init_MUTEX(&ec_ecdt->burst.sem); |
| 1407 | init_waitqueue_head(&ec_ecdt->burst.wait); |
| 1408 | status = acpi_walk_resources(handle, METHOD_NAME__CRS, |
| 1409 | acpi_ec_io_ports, ec_ecdt); |
| 1410 | if (ACPI_FAILURE(status)) |
| 1411 | return status; |
| 1412 | ec_ecdt->common.status_addr = ec_ecdt->common.command_addr; |
| 1413 | |
| 1414 | ec_ecdt->common.uid = -1; |
| 1415 | acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid); |
| 1416 | |
| 1417 | status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->common.gpe_bit); |
| 1418 | if (ACPI_FAILURE(status)) |
| 1419 | return status; |
| 1420 | ec_ecdt->common.global_lock = TRUE; |
| 1421 | ec_ecdt->common.handle = handle; |
| 1422 | |
| 1423 | printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n", |
| 1424 | (u32) ec_ecdt->common.gpe_bit, (u32) ec_ecdt->common.command_addr.address, |
| 1425 | (u32) ec_ecdt->common.data_addr.address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | |
| 1427 | return AE_CTRL_TERMINATE; |
| 1428 | } |
| 1429 | |
| 1430 | /* |
| 1431 | * Some BIOS (such as some from Gateway laptops) access EC region very early |
| 1432 | * such as in BAT0._INI or EC._INI before an EC device is found and |
| 1433 | * do not provide an ECDT. According to ACPI spec, ECDT isn't mandatorily |
| 1434 | * required, but if EC regison is accessed early, it is required. |
| 1435 | * The routine tries to workaround the BIOS bug by pre-scan EC device |
| 1436 | * It assumes that _CRS, _HID, _GPE, _UID methods of EC don't touch any |
| 1437 | * op region (since _REG isn't invoked yet). The assumption is true for |
| 1438 | * all systems found. |
| 1439 | */ |
| 1440 | static int __init |
| 1441 | acpi_ec_fake_ecdt(void) |
| 1442 | { |
| 1443 | acpi_status status; |
| 1444 | int ret = 0; |
| 1445 | |
| 1446 | printk(KERN_INFO PREFIX "Try to make an fake ECDT\n"); |
| 1447 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1448 | ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | if (!ec_ecdt) { |
| 1450 | ret = -ENOMEM; |
| 1451 | goto error; |
| 1452 | } |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1453 | memset(ec_ecdt, 0, sizeof(union acpi_ec)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | |
| 1455 | status = acpi_get_devices (ACPI_EC_HID, |
| 1456 | acpi_fake_ecdt_callback, |
| 1457 | NULL, |
| 1458 | NULL); |
| 1459 | if (ACPI_FAILURE(status)) { |
| 1460 | kfree(ec_ecdt); |
| 1461 | ec_ecdt = NULL; |
| 1462 | ret = -ENODEV; |
| 1463 | goto error; |
| 1464 | } |
| 1465 | return 0; |
| 1466 | error: |
| 1467 | printk(KERN_ERR PREFIX "Can't make an fake ECDT\n"); |
| 1468 | return ret; |
| 1469 | } |
| 1470 | |
| 1471 | static int __init |
| 1472 | acpi_ec_get_real_ecdt(void) |
| 1473 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1474 | if (acpi_ec_polling_mode) |
| 1475 | return acpi_ec_polling_get_real_ecdt(); |
| 1476 | else |
| 1477 | return acpi_ec_burst_get_real_ecdt(); |
| 1478 | } |
| 1479 | |
| 1480 | static int __init |
| 1481 | acpi_ec_polling_get_real_ecdt(void) |
| 1482 | { |
| 1483 | acpi_status status; |
| 1484 | struct acpi_table_ecdt *ecdt_ptr; |
| 1485 | |
| 1486 | status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, |
| 1487 | (struct acpi_table_header **) &ecdt_ptr); |
| 1488 | if (ACPI_FAILURE(status)) |
| 1489 | return -ENODEV; |
| 1490 | |
| 1491 | printk(KERN_INFO PREFIX "Found ECDT\n"); |
| 1492 | |
| 1493 | /* |
| 1494 | * Generate a temporary ec context to use until the namespace is scanned |
| 1495 | */ |
| 1496 | ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); |
| 1497 | if (!ec_ecdt) |
| 1498 | return -ENOMEM; |
| 1499 | memset(ec_ecdt, 0, sizeof(union acpi_ec)); |
| 1500 | |
| 1501 | ec_ecdt->common.command_addr = ecdt_ptr->ec_control; |
| 1502 | ec_ecdt->common.status_addr = ecdt_ptr->ec_control; |
| 1503 | ec_ecdt->common.data_addr = ecdt_ptr->ec_data; |
| 1504 | ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit; |
| 1505 | spin_lock_init(&ec_ecdt->polling.lock); |
| 1506 | /* use the GL just to be safe */ |
| 1507 | ec_ecdt->common.global_lock = TRUE; |
| 1508 | ec_ecdt->common.uid = ecdt_ptr->uid; |
| 1509 | |
| 1510 | status = acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle); |
| 1511 | if (ACPI_FAILURE(status)) { |
| 1512 | goto error; |
| 1513 | } |
| 1514 | |
| 1515 | return 0; |
| 1516 | error: |
| 1517 | printk(KERN_ERR PREFIX "Could not use ECDT\n"); |
| 1518 | kfree(ec_ecdt); |
| 1519 | ec_ecdt = NULL; |
| 1520 | |
| 1521 | return -ENODEV; |
| 1522 | } |
| 1523 | |
| 1524 | |
| 1525 | static int __init |
| 1526 | acpi_ec_burst_get_real_ecdt(void) |
| 1527 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | acpi_status status; |
| 1529 | struct acpi_table_ecdt *ecdt_ptr; |
| 1530 | |
Dmitry Torokhov | 451566f | 2005-03-19 01:10:05 -0500 | [diff] [blame] | 1531 | status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | (struct acpi_table_header **) &ecdt_ptr); |
| 1533 | if (ACPI_FAILURE(status)) |
| 1534 | return -ENODEV; |
| 1535 | |
| 1536 | printk(KERN_INFO PREFIX "Found ECDT\n"); |
| 1537 | |
| 1538 | /* |
| 1539 | * Generate a temporary ec context to use until the namespace is scanned |
| 1540 | */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1541 | ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | if (!ec_ecdt) |
| 1543 | return -ENOMEM; |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1544 | memset(ec_ecdt, 0, sizeof(union acpi_ec)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1546 | init_MUTEX(&ec_ecdt->burst.sem); |
| 1547 | init_waitqueue_head(&ec_ecdt->burst.wait); |
| 1548 | ec_ecdt->common.command_addr = ecdt_ptr->ec_control; |
| 1549 | ec_ecdt->common.status_addr = ecdt_ptr->ec_control; |
| 1550 | ec_ecdt->common.data_addr = ecdt_ptr->ec_data; |
| 1551 | ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | /* use the GL just to be safe */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1553 | ec_ecdt->common.global_lock = TRUE; |
| 1554 | ec_ecdt->common.uid = ecdt_ptr->uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1556 | status = acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | if (ACPI_FAILURE(status)) { |
| 1558 | goto error; |
| 1559 | } |
| 1560 | |
| 1561 | return 0; |
| 1562 | error: |
| 1563 | printk(KERN_ERR PREFIX "Could not use ECDT\n"); |
| 1564 | kfree(ec_ecdt); |
| 1565 | ec_ecdt = NULL; |
| 1566 | |
| 1567 | return -ENODEV; |
| 1568 | } |
| 1569 | |
| 1570 | static int __initdata acpi_fake_ecdt_enabled; |
| 1571 | int __init |
| 1572 | acpi_ec_ecdt_probe (void) |
| 1573 | { |
| 1574 | acpi_status status; |
| 1575 | int ret; |
| 1576 | |
| 1577 | ret = acpi_ec_get_real_ecdt(); |
| 1578 | /* Try to make a fake ECDT */ |
| 1579 | if (ret && acpi_fake_ecdt_enabled) { |
| 1580 | ret = acpi_ec_fake_ecdt(); |
| 1581 | } |
| 1582 | |
| 1583 | if (ret) |
| 1584 | return 0; |
| 1585 | |
| 1586 | /* |
| 1587 | * Install GPE handler |
| 1588 | */ |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1589 | status = acpi_install_gpe_handler(NULL, ec_ecdt->common.gpe_bit, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | ACPI_GPE_EDGE_TRIGGERED, &acpi_ec_gpe_handler, |
| 1591 | ec_ecdt); |
| 1592 | if (ACPI_FAILURE(status)) { |
| 1593 | goto error; |
| 1594 | } |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1595 | acpi_set_gpe_type (NULL, ec_ecdt->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME); |
| 1596 | acpi_enable_gpe (NULL, ec_ecdt->common.gpe_bit, ACPI_NOT_ISR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | |
| 1598 | status = acpi_install_address_space_handler (ACPI_ROOT_OBJECT, |
| 1599 | ACPI_ADR_SPACE_EC, &acpi_ec_space_handler, |
| 1600 | &acpi_ec_space_setup, ec_ecdt); |
| 1601 | if (ACPI_FAILURE(status)) { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1602 | acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | &acpi_ec_gpe_handler); |
| 1604 | goto error; |
| 1605 | } |
| 1606 | |
| 1607 | return 0; |
| 1608 | |
| 1609 | error: |
| 1610 | printk(KERN_ERR PREFIX "Could not use ECDT\n"); |
| 1611 | kfree(ec_ecdt); |
| 1612 | ec_ecdt = NULL; |
| 1613 | |
| 1614 | return -ENODEV; |
| 1615 | } |
| 1616 | |
| 1617 | |
| 1618 | static int __init acpi_ec_init (void) |
| 1619 | { |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1620 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | |
| 1622 | ACPI_FUNCTION_TRACE("acpi_ec_init"); |
| 1623 | |
| 1624 | if (acpi_disabled) |
| 1625 | return_VALUE(0); |
| 1626 | |
| 1627 | acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir); |
| 1628 | if (!acpi_ec_dir) |
| 1629 | return_VALUE(-ENODEV); |
| 1630 | |
| 1631 | /* Now register the driver for the EC */ |
| 1632 | result = acpi_bus_register_driver(&acpi_ec_driver); |
| 1633 | if (result < 0) { |
| 1634 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); |
| 1635 | return_VALUE(-ENODEV); |
| 1636 | } |
| 1637 | |
| 1638 | return_VALUE(result); |
| 1639 | } |
| 1640 | |
| 1641 | subsys_initcall(acpi_ec_init); |
| 1642 | |
| 1643 | /* EC driver currently not unloadable */ |
| 1644 | #if 0 |
| 1645 | static void __exit |
| 1646 | acpi_ec_exit (void) |
| 1647 | { |
| 1648 | ACPI_FUNCTION_TRACE("acpi_ec_exit"); |
| 1649 | |
| 1650 | acpi_bus_unregister_driver(&acpi_ec_driver); |
| 1651 | |
| 1652 | remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); |
| 1653 | |
| 1654 | return_VOID; |
| 1655 | } |
| 1656 | #endif /* 0 */ |
| 1657 | |
| 1658 | static int __init acpi_fake_ecdt_setup(char *str) |
| 1659 | { |
| 1660 | acpi_fake_ecdt_enabled = 1; |
| 1661 | return 0; |
| 1662 | } |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | __setup("acpi_fake_ecdt", acpi_fake_ecdt_setup); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1665 | static int __init acpi_ec_set_polling_mode(char *str) |
| 1666 | { |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1667 | int burst; |
| 1668 | |
| 1669 | if (!get_option(&str, &burst)) |
| 1670 | return 0; |
| 1671 | |
| 1672 | if (burst) { |
| 1673 | acpi_ec_polling_mode = EC_BURST; |
| 1674 | acpi_ec_driver.ops.add = acpi_ec_burst_add; |
| 1675 | } else { |
| 1676 | acpi_ec_polling_mode = EC_POLLING; |
| 1677 | acpi_ec_driver.ops.add = acpi_ec_polling_add; |
| 1678 | } |
| 1679 | printk(KERN_INFO PREFIX "EC %s mode.\n", |
| 1680 | burst ? "burst": "polling"); |
Luming Yu | 45bea15 | 2005-07-23 04:08:00 -0400 | [diff] [blame] | 1681 | return 0; |
| 1682 | } |
Luming Yu | 7b15f5e | 2005-08-03 17:38:04 -0400 | [diff] [blame] | 1683 | __setup("ec_burst=", acpi_ec_set_polling_mode); |