Subject: [PATCH] [acpi driver model] Move EC driver. Signed-off-by: Patrick Mochel --- drivers/acpi/Makefile | 1 drivers/acpi/drivers/legacy/Makefile | 1 drivers/acpi/drivers/legacy/ec.c | 1592 ++++++++++++++++++++++++++++++++++ drivers/acpi/ec.c | 1592 ---------------------------------- 4 files changed, 1593 insertions(+), 1593 deletions(-) create mode 100644 drivers/acpi/drivers/legacy/ec.c delete mode 100644 drivers/acpi/ec.c applies-to: af2e28a8f16cd57400e5f29fd8c9d99fc4880286 ec6896a986030039af11df586d8f3002f53cf6f9 diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index afd12af..b9b520c 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -38,7 +38,6 @@ endif obj-y += sleep/ obj-y += bus.o glue.o obj-y += drivers/ -obj-$(CONFIG_ACPI_EC) += ec.o obj-$(CONFIG_ACPI_FAN) += fan.o obj-$(CONFIG_ACPI_VIDEO) += video.o obj-$(CONFIG_ACPI_HOTKEY) += hotkey.o diff --git a/drivers/acpi/drivers/legacy/Makefile b/drivers/acpi/drivers/legacy/Makefile index 56a433c..caa9816 100644 --- a/drivers/acpi/drivers/legacy/Makefile +++ b/drivers/acpi/drivers/legacy/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_ACPI_AC) += ac.o obj-$(CONFIG_ACPI_BATTERY) += battery.o obj-$(CONFIG_ACPI_BUTTON) += button.o +obj-$(CONFIG_ACPI_EC) += ec.o diff --git a/drivers/acpi/drivers/legacy/ec.c b/drivers/acpi/drivers/legacy/ec.c new file mode 100644 index 0000000..7e1a445 --- /dev/null +++ b/drivers/acpi/drivers/legacy/ec.c @@ -0,0 +1,1592 @@ +/* + * acpi_ec.c - ACPI Embedded Controller Driver ($Revision: 38 $) + * + * Copyright (C) 2004 Luming Yu + * Copyright (C) 2001, 2002 Andy Grover + * Copyright (C) 2001, 2002 Paul Diefenbaugh + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define _COMPONENT ACPI_EC_COMPONENT +ACPI_MODULE_NAME("acpi_ec") +#define ACPI_EC_COMPONENT 0x00100000 +#define ACPI_EC_CLASS "embedded_controller" +#define ACPI_EC_HID "PNP0C09" +#define ACPI_EC_DRIVER_NAME "ACPI Embedded Controller Driver" +#define ACPI_EC_DEVICE_NAME "Embedded Controller" +#define ACPI_EC_FILE_INFO "info" +#define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */ +#define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */ +#define ACPI_EC_FLAG_BURST 0x10 /* burst mode */ +#define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */ +#define ACPI_EC_EVENT_OBF 0x01 /* Output buffer full */ +#define ACPI_EC_EVENT_IBE 0x02 /* Input buffer empty */ +#define ACPI_EC_DELAY 50 /* Wait 50ms max. during EC ops */ +#define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ +#define ACPI_EC_UDELAY 100 /* Poll @ 100us increments */ +#define ACPI_EC_UDELAY_COUNT 1000 /* Wait 10ms max. during EC ops */ +#define ACPI_EC_COMMAND_READ 0x80 +#define ACPI_EC_COMMAND_WRITE 0x81 +#define ACPI_EC_BURST_ENABLE 0x82 +#define ACPI_EC_BURST_DISABLE 0x83 +#define ACPI_EC_COMMAND_QUERY 0x84 +#define EC_POLLING 0xFF +#define EC_BURST 0x00 +static int acpi_ec_remove(struct acpi_device *device, int type); +static int acpi_ec_start(struct acpi_device *device); +static int acpi_ec_stop(struct acpi_device *device, int type); +static int acpi_ec_burst_add(struct acpi_device *device); +static int acpi_ec_polling_add(struct acpi_device *device); + +static struct acpi_driver acpi_ec_driver = { + .name = ACPI_EC_DRIVER_NAME, + .class = ACPI_EC_CLASS, + .ids = ACPI_EC_HID, + .ops = { + .add = acpi_ec_polling_add, + .remove = acpi_ec_remove, + .start = acpi_ec_start, + .stop = acpi_ec_stop, + }, +}; +union acpi_ec { + struct { + u32 mode; + acpi_handle handle; + unsigned long uid; + unsigned long gpe_bit; + struct acpi_generic_address status_addr; + struct acpi_generic_address command_addr; + struct acpi_generic_address data_addr; + unsigned long global_lock; + } common; + + struct { + u32 mode; + acpi_handle handle; + unsigned long uid; + unsigned long gpe_bit; + struct acpi_generic_address status_addr; + struct acpi_generic_address command_addr; + struct acpi_generic_address data_addr; + unsigned long global_lock; + unsigned int expect_event; + atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */ + atomic_t pending_gpe; + struct semaphore sem; + wait_queue_head_t wait; + } burst; + + struct { + u32 mode; + acpi_handle handle; + unsigned long uid; + unsigned long gpe_bit; + struct acpi_generic_address status_addr; + struct acpi_generic_address command_addr; + struct acpi_generic_address data_addr; + unsigned long global_lock; + spinlock_t lock; + } polling; +}; + +static int acpi_ec_polling_wait(union acpi_ec *ec, u8 event); +static int acpi_ec_burst_wait(union acpi_ec *ec, unsigned int event); +static int acpi_ec_polling_read(union acpi_ec *ec, u8 address, u32 * data); +static int acpi_ec_burst_read(union acpi_ec *ec, u8 address, u32 * data); +static int acpi_ec_polling_write(union acpi_ec *ec, u8 address, u8 data); +static int acpi_ec_burst_write(union acpi_ec *ec, u8 address, u8 data); +static int acpi_ec_polling_query(union acpi_ec *ec, u32 * data); +static int acpi_ec_burst_query(union acpi_ec *ec, u32 * data); +static void acpi_ec_gpe_polling_query(void *ec_cxt); +static void acpi_ec_gpe_burst_query(void *ec_cxt); +static u32 acpi_ec_gpe_polling_handler(void *data); +static u32 acpi_ec_gpe_burst_handler(void *data); +static acpi_status __init +acpi_fake_ecdt_polling_callback(acpi_handle handle, + u32 Level, void *context, void **retval); + +static acpi_status __init +acpi_fake_ecdt_burst_callback(acpi_handle handle, + u32 Level, void *context, void **retval); + +static int __init acpi_ec_polling_get_real_ecdt(void); +static int __init acpi_ec_burst_get_real_ecdt(void); +/* If we find an EC via the ECDT, we need to keep a ptr to its context */ +static union acpi_ec *ec_ecdt; + +/* External interfaces use first EC only, so remember */ +static struct acpi_device *first_ec; +static int acpi_ec_polling_mode = EC_POLLING; + +/* -------------------------------------------------------------------------- + Transaction Management + -------------------------------------------------------------------------- */ + +static inline u32 acpi_ec_read_status(union acpi_ec *ec) +{ + u32 status = 0; + + acpi_hw_low_level_read(8, &status, &ec->common.status_addr); + return status; +} + +static int acpi_ec_wait(union acpi_ec *ec, u8 event) +{ + if (acpi_ec_polling_mode) + return acpi_ec_polling_wait(ec, event); + else + return acpi_ec_burst_wait(ec, event); +} + +static int acpi_ec_polling_wait(union acpi_ec *ec, u8 event) +{ + u32 acpi_ec_status = 0; + u32 i = ACPI_EC_UDELAY_COUNT; + + if (!ec) + return -EINVAL; + + /* Poll the EC status register waiting for the event to occur. */ + switch (event) { + case ACPI_EC_EVENT_OBF: + do { + acpi_hw_low_level_read(8, &acpi_ec_status, + &ec->common.status_addr); + if (acpi_ec_status & ACPI_EC_FLAG_OBF) + return 0; + udelay(ACPI_EC_UDELAY); + } while (--i > 0); + break; + case ACPI_EC_EVENT_IBE: + do { + acpi_hw_low_level_read(8, &acpi_ec_status, + &ec->common.status_addr); + if (!(acpi_ec_status & ACPI_EC_FLAG_IBF)) + return 0; + udelay(ACPI_EC_UDELAY); + } while (--i > 0); + break; + default: + return -EINVAL; + } + + return -ETIME; +} +static int acpi_ec_burst_wait(union acpi_ec *ec, unsigned int event) +{ + int result = 0; + + ACPI_FUNCTION_TRACE("acpi_ec_wait"); + + ec->burst.expect_event = event; + smp_mb(); + + switch (event) { + case ACPI_EC_EVENT_OBF: + if (acpi_ec_read_status(ec) & event) { + ec->burst.expect_event = 0; + return_VALUE(0); + } + break; + + case ACPI_EC_EVENT_IBE: + if (~acpi_ec_read_status(ec) & event) { + ec->burst.expect_event = 0; + return_VALUE(0); + } + break; + } + + result = wait_event_timeout(ec->burst.wait, + !ec->burst.expect_event, + msecs_to_jiffies(ACPI_EC_DELAY)); + + ec->burst.expect_event = 0; + smp_mb(); + + /* + * Verify that the event in question has actually happened by + * querying EC status. Do the check even if operation timed-out + * to make sure that we did not miss interrupt. + */ + switch (event) { + case ACPI_EC_EVENT_OBF: + if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_OBF) + return_VALUE(0); + break; + + case ACPI_EC_EVENT_IBE: + if (~acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) + return_VALUE(0); + break; + } + + return_VALUE(-ETIME); +} + +static int acpi_ec_enter_burst_mode(union acpi_ec *ec) +{ + u32 tmp = 0; + int status = 0; + + ACPI_FUNCTION_TRACE("acpi_ec_enter_burst_mode"); + + status = acpi_ec_read_status(ec); + if (status != -EINVAL && !(status & ACPI_EC_FLAG_BURST)) { + status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + if (status) + goto end; + acpi_hw_low_level_write(8, ACPI_EC_BURST_ENABLE, + &ec->common.command_addr); + status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); + if (status) + return_VALUE(-EINVAL); + acpi_hw_low_level_read(8, &tmp, &ec->common.data_addr); + if (tmp != 0x90) { /* Burst ACK byte */ + return_VALUE(-EINVAL); + } + } + + atomic_set(&ec->burst.leaving_burst, 0); + return_VALUE(0); + end: + printk("Error in acpi_ec_wait\n"); + return_VALUE(-1); +} + +static int acpi_ec_leave_burst_mode(union acpi_ec *ec) +{ + + ACPI_FUNCTION_TRACE("acpi_ec_leave_burst_mode"); + + atomic_set(&ec->burst.leaving_burst, 1); + return_VALUE(0); +} + +static int acpi_ec_read(union acpi_ec *ec, u8 address, u32 * data) +{ + if (acpi_ec_polling_mode) + return acpi_ec_polling_read(ec, address, data); + else + return acpi_ec_burst_read(ec, address, data); +} +static int acpi_ec_write(union acpi_ec *ec, u8 address, u8 data) +{ + if (acpi_ec_polling_mode) + return acpi_ec_polling_write(ec, address, data); + else + return acpi_ec_burst_write(ec, address, data); +} +static int acpi_ec_polling_read(union acpi_ec *ec, u8 address, u32 * data) +{ + acpi_status status = AE_OK; + int result = 0; + unsigned long flags = 0; + u32 glk = 0; + + ACPI_FUNCTION_TRACE("acpi_ec_read"); + + if (!ec || !data) + return_VALUE(-EINVAL); + + *data = 0; + + if (ec->common.global_lock) { + status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); + if (ACPI_FAILURE(status)) + return_VALUE(-ENODEV); + } + + spin_lock_irqsave(&ec->polling.lock, flags); + + acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, + &ec->common.command_addr); + result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + if (result) + goto end; + + acpi_hw_low_level_write(8, address, &ec->common.data_addr); + result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); + if (result) + goto end; + + acpi_hw_low_level_read(8, data, &ec->common.data_addr); + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n", + *data, address)); + + end: + spin_unlock_irqrestore(&ec->polling.lock, flags); + + if (ec->common.global_lock) + acpi_release_global_lock(glk); + + return_VALUE(result); +} + +static int acpi_ec_polling_write(union acpi_ec *ec, u8 address, u8 data) +{ + int result = 0; + acpi_status status = AE_OK; + unsigned long flags = 0; + u32 glk = 0; + + ACPI_FUNCTION_TRACE("acpi_ec_write"); + + if (!ec) + return_VALUE(-EINVAL); + + if (ec->common.global_lock) { + status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); + if (ACPI_FAILURE(status)) + return_VALUE(-ENODEV); + } + + spin_lock_irqsave(&ec->polling.lock, flags); + + acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, + &ec->common.command_addr); + result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + if (result) + goto end; + + acpi_hw_low_level_write(8, address, &ec->common.data_addr); + result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + if (result) + goto end; + + acpi_hw_low_level_write(8, data, &ec->common.data_addr); + result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + if (result) + goto end; + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n", + data, address)); + + end: + spin_unlock_irqrestore(&ec->polling.lock, flags); + + if (ec->common.global_lock) + acpi_release_global_lock(glk); + + return_VALUE(result); +} + +static int acpi_ec_burst_read(union acpi_ec *ec, u8 address, u32 * data) +{ + int status = 0; + u32 glk; + + ACPI_FUNCTION_TRACE("acpi_ec_read"); + + if (!ec || !data) + return_VALUE(-EINVAL); + + *data = 0; + + if (ec->common.global_lock) { + status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); + if (ACPI_FAILURE(status)) + return_VALUE(-ENODEV); + } + + WARN_ON(in_interrupt()); + down(&ec->burst.sem); + + acpi_ec_enter_burst_mode(ec); + status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + if (status) { + printk("read EC, IB not empty\n"); + goto end; + } + acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, + &ec->common.command_addr); + status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + if (status) { + printk("read EC, IB not empty\n"); + } + + acpi_hw_low_level_write(8, address, &ec->common.data_addr); + status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); + if (status) { + printk("read EC, OB not full\n"); + goto end; + } + acpi_hw_low_level_read(8, data, &ec->common.data_addr); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n", + *data, address)); + + end: + acpi_ec_leave_burst_mode(ec); + up(&ec->burst.sem); + + if (ec->common.global_lock) + acpi_release_global_lock(glk); + + return_VALUE(status); +} + +static int acpi_ec_burst_write(union acpi_ec *ec, u8 address, u8 data) +{ + int status = 0; + u32 glk; + + ACPI_FUNCTION_TRACE("acpi_ec_write"); + + if (!ec) + return_VALUE(-EINVAL); + + if (ec->common.global_lock) { + status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); + if (ACPI_FAILURE(status)) + return_VALUE(-ENODEV); + } + + WARN_ON(in_interrupt()); + down(&ec->burst.sem); + + acpi_ec_enter_burst_mode(ec); + + status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + if (status) { + printk("write EC, IB not empty\n"); + } + acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, + &ec->common.command_addr); + status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + if (status) { + printk("write EC, IB not empty\n"); + } + + acpi_hw_low_level_write(8, address, &ec->common.data_addr); + status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + if (status) { + printk("write EC, IB not empty\n"); + } + + acpi_hw_low_level_write(8, data, &ec->common.data_addr); + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n", + data, address)); + + acpi_ec_leave_burst_mode(ec); + up(&ec->burst.sem); + + if (ec->common.global_lock) + acpi_release_global_lock(glk); + + return_VALUE(status); +} + +/* + * Externally callable EC access functions. For now, assume 1 EC only + */ +int ec_read(u8 addr, u8 * val) +{ + union acpi_ec *ec; + int err; + u32 temp_data; + + if (!first_ec) + return -ENODEV; + + ec = acpi_driver_data(first_ec); + + err = acpi_ec_read(ec, addr, &temp_data); + + if (!err) { + *val = temp_data; + return 0; + } else + return err; +} + +EXPORT_SYMBOL(ec_read); + +int ec_write(u8 addr, u8 val) +{ + union acpi_ec *ec; + int err; + + if (!first_ec) + return -ENODEV; + + ec = acpi_driver_data(first_ec); + + err = acpi_ec_write(ec, addr, val); + + return err; +} + +EXPORT_SYMBOL(ec_write); + +static int acpi_ec_query(union acpi_ec *ec, u32 * data) +{ + if (acpi_ec_polling_mode) + return acpi_ec_polling_query(ec, data); + else + return acpi_ec_burst_query(ec, data); +} +static int acpi_ec_polling_query(union acpi_ec *ec, u32 * data) +{ + int result = 0; + acpi_status status = AE_OK; + unsigned long flags = 0; + u32 glk = 0; + + ACPI_FUNCTION_TRACE("acpi_ec_query"); + + if (!ec || !data) + return_VALUE(-EINVAL); + + *data = 0; + + if (ec->common.global_lock) { + status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); + if (ACPI_FAILURE(status)) + return_VALUE(-ENODEV); + } + + /* + * Query the EC to find out which _Qxx method we need to evaluate. + * Note that successful completion of the query causes the ACPI_EC_SCI + * bit to be cleared (and thus clearing the interrupt source). + */ + spin_lock_irqsave(&ec->polling.lock, flags); + + acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, + &ec->common.command_addr); + result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); + if (result) + goto end; + + acpi_hw_low_level_read(8, data, &ec->common.data_addr); + if (!*data) + result = -ENODATA; + + end: + spin_unlock_irqrestore(&ec->polling.lock, flags); + + if (ec->common.global_lock) + acpi_release_global_lock(glk); + + return_VALUE(result); +} +static int acpi_ec_burst_query(union acpi_ec *ec, u32 * data) +{ + int status = 0; + u32 glk; + + ACPI_FUNCTION_TRACE("acpi_ec_query"); + + if (!ec || !data) + return_VALUE(-EINVAL); + *data = 0; + + if (ec->common.global_lock) { + status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); + if (ACPI_FAILURE(status)) + return_VALUE(-ENODEV); + } + + down(&ec->burst.sem); + + status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); + if (status) { + printk("query EC, IB not empty\n"); + goto end; + } + /* + * Query the EC to find out which _Qxx method we need to evaluate. + * Note that successful completion of the query causes the ACPI_EC_SCI + * bit to be cleared (and thus clearing the interrupt source). + */ + acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, + &ec->common.command_addr); + status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); + if (status) { + printk("query EC, OB not full\n"); + goto end; + } + + acpi_hw_low_level_read(8, data, &ec->common.data_addr); + if (!*data) + status = -ENODATA; + + end: + up(&ec->burst.sem); + + if (ec->common.global_lock) + acpi_release_global_lock(glk); + + return_VALUE(status); +} + +/* -------------------------------------------------------------------------- + Event Management + -------------------------------------------------------------------------- */ + +union acpi_ec_query_data { + acpi_handle handle; + u8 data; +}; + +static void acpi_ec_gpe_query(void *ec_cxt) +{ + if (acpi_ec_polling_mode) + acpi_ec_gpe_polling_query(ec_cxt); + else + acpi_ec_gpe_burst_query(ec_cxt); +} + +static void acpi_ec_gpe_polling_query(void *ec_cxt) +{ + union acpi_ec *ec = (union acpi_ec *)ec_cxt; + u32 value = 0; + unsigned long flags = 0; + static char object_name[5] = { '_', 'Q', '0', '0', '\0' }; + const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' + }; + + ACPI_FUNCTION_TRACE("acpi_ec_gpe_query"); + + if (!ec_cxt) + goto end; + + spin_lock_irqsave(&ec->polling.lock, flags); + acpi_hw_low_level_read(8, &value, &ec->common.command_addr); + spin_unlock_irqrestore(&ec->polling.lock, flags); + + /* TBD: Implement asynch events! + * NOTE: All we care about are EC-SCI's. Other EC events are + * handled via polling (yuck!). This is because some systems + * treat EC-SCIs as level (versus EDGE!) triggered, preventing + * a purely interrupt-driven approach (grumble, grumble). + */ + if (!(value & ACPI_EC_FLAG_SCI)) + goto end; + + if (acpi_ec_query(ec, &value)) + goto end; + + object_name[2] = hex[((value >> 4) & 0x0F)]; + object_name[3] = hex[(value & 0x0F)]; + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name)); + + acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL); + + end: + acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); +} +static void acpi_ec_gpe_burst_query(void *ec_cxt) +{ + union acpi_ec *ec = (union acpi_ec *)ec_cxt; + u32 value; + int result = -ENODATA; + static char object_name[5] = { '_', 'Q', '0', '0', '\0' }; + const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' + }; + + ACPI_FUNCTION_TRACE("acpi_ec_gpe_query"); + + if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI) + result = acpi_ec_query(ec, &value); + + if (result) + goto end; + + object_name[2] = hex[((value >> 4) & 0x0F)]; + object_name[3] = hex[(value & 0x0F)]; + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name)); + + acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL); + end: + atomic_dec(&ec->burst.pending_gpe); + return; +} + +static u32 acpi_ec_gpe_handler(void *data) +{ + if (acpi_ec_polling_mode) + return acpi_ec_gpe_polling_handler(data); + else + return acpi_ec_gpe_burst_handler(data); +} +static u32 acpi_ec_gpe_polling_handler(void *data) +{ + acpi_status status = AE_OK; + union acpi_ec *ec = (union acpi_ec *)data; + + if (!ec) + return ACPI_INTERRUPT_NOT_HANDLED; + + acpi_disable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); + + status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE, + acpi_ec_gpe_query, ec); + + if (status == AE_OK) + return ACPI_INTERRUPT_HANDLED; + else + return ACPI_INTERRUPT_NOT_HANDLED; +} +static u32 acpi_ec_gpe_burst_handler(void *data) +{ + acpi_status status = AE_OK; + u32 value; + union acpi_ec *ec = (union acpi_ec *)data; + + if (!ec) + return ACPI_INTERRUPT_NOT_HANDLED; + + acpi_clear_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); + value = acpi_ec_read_status(ec); + + switch (ec->burst.expect_event) { + case ACPI_EC_EVENT_OBF: + if (!(value & ACPI_EC_FLAG_OBF)) + break; + case ACPI_EC_EVENT_IBE: + if ((value & ACPI_EC_FLAG_IBF)) + break; + ec->burst.expect_event = 0; + wake_up(&ec->burst.wait); + return ACPI_INTERRUPT_HANDLED; + default: + break; + } + + if (value & ACPI_EC_FLAG_SCI) { + atomic_add(1, &ec->burst.pending_gpe); + status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE, + acpi_ec_gpe_query, ec); + return status == AE_OK ? + ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; + } + acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); + return status == AE_OK ? + ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; +} + +/* -------------------------------------------------------------------------- + Address Space Management + -------------------------------------------------------------------------- */ + +static acpi_status +acpi_ec_space_setup(acpi_handle region_handle, + u32 function, void *handler_context, void **return_context) +{ + /* + * The EC object is in the handler context and is needed + * when calling the acpi_ec_space_handler. + */ + *return_context = (function != ACPI_REGION_DEACTIVATE) ? + handler_context : NULL; + + return AE_OK; +} + +static acpi_status +acpi_ec_space_handler(u32 function, + acpi_physical_address address, + u32 bit_width, + acpi_integer * value, + void *handler_context, void *region_context) +{ + int result = 0; + union acpi_ec *ec = NULL; + u64 temp = *value; + acpi_integer f_v = 0; + int i = 0; + + ACPI_FUNCTION_TRACE("acpi_ec_space_handler"); + + if ((address > 0xFF) || !value || !handler_context) + return_VALUE(AE_BAD_PARAMETER); + + if (bit_width != 8 && acpi_strict) { + printk(KERN_WARNING PREFIX + "acpi_ec_space_handler: bit_width should be 8\n"); + return_VALUE(AE_BAD_PARAMETER); + } + + ec = (union acpi_ec *)handler_context; + + next_byte: + switch (function) { + case ACPI_READ: + temp = 0; + result = acpi_ec_read(ec, (u8) address, (u32 *) & temp); + break; + case ACPI_WRITE: + result = acpi_ec_write(ec, (u8) address, (u8) temp); + break; + default: + result = -EINVAL; + goto out; + break; + } + + bit_width -= 8; + if (bit_width) { + if (function == ACPI_READ) + f_v |= temp << 8 * i; + if (function == ACPI_WRITE) + temp >>= 8; + i++; + address++; + goto next_byte; + } + + if (function == ACPI_READ) { + f_v |= temp << 8 * i; + *value = f_v; + } + + out: + switch (result) { + case -EINVAL: + return_VALUE(AE_BAD_PARAMETER); + break; + case -ENODEV: + return_VALUE(AE_NOT_FOUND); + break; + case -ETIME: + return_VALUE(AE_TIME); + break; + default: + return_VALUE(AE_OK); + } +} + +/* -------------------------------------------------------------------------- + FS Interface (/proc) + -------------------------------------------------------------------------- */ + +static struct proc_dir_entry *acpi_ec_dir; + +static int acpi_ec_read_info(struct seq_file *seq, void *offset) +{ + union acpi_ec *ec = (union acpi_ec *)seq->private; + + ACPI_FUNCTION_TRACE("acpi_ec_read_info"); + + if (!ec) + goto end; + + seq_printf(seq, "gpe bit: 0x%02x\n", + (u32) ec->common.gpe_bit); + seq_printf(seq, "ports: 0x%02x, 0x%02x\n", + (u32) ec->common.status_addr.address, + (u32) ec->common.data_addr.address); + seq_printf(seq, "use global lock: %s\n", + ec->common.global_lock ? "yes" : "no"); + acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); + + end: + return_VALUE(0); +} + +static int acpi_ec_info_open_fs(struct inode *inode, struct file *file) +{ + return single_open(file, acpi_ec_read_info, PDE(inode)->data); +} + +static struct file_operations acpi_ec_info_ops = { + .open = acpi_ec_info_open_fs, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .owner = THIS_MODULE, +}; + +static int acpi_ec_add_fs(struct acpi_device *device) +{ + struct proc_dir_entry *entry = NULL; + + ACPI_FUNCTION_TRACE("acpi_ec_add_fs"); + + if (!acpi_device_dir(device)) { + acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), + acpi_ec_dir); + if (!acpi_device_dir(device)) + return_VALUE(-ENODEV); + } + + entry = create_proc_entry(ACPI_EC_FILE_INFO, S_IRUGO, + acpi_device_dir(device)); + if (!entry) + ACPI_DEBUG_PRINT((ACPI_DB_WARN, + "Unable to create '%s' fs entry\n", + ACPI_EC_FILE_INFO)); + else { + entry->proc_fops = &acpi_ec_info_ops; + entry->data = acpi_driver_data(device); + entry->owner = THIS_MODULE; + } + + return_VALUE(0); +} + +static int acpi_ec_remove_fs(struct acpi_device *device) +{ + ACPI_FUNCTION_TRACE("acpi_ec_remove_fs"); + + if (acpi_device_dir(device)) { + remove_proc_entry(ACPI_EC_FILE_INFO, acpi_device_dir(device)); + remove_proc_entry(acpi_device_bid(device), acpi_ec_dir); + acpi_device_dir(device) = NULL; + } + + return_VALUE(0); +} + +/* -------------------------------------------------------------------------- + Driver Interface + -------------------------------------------------------------------------- */ + +static int acpi_ec_polling_add(struct acpi_device *device) +{ + int result = 0; + acpi_status status = AE_OK; + union acpi_ec *ec = NULL; + unsigned long uid; + + ACPI_FUNCTION_TRACE("acpi_ec_add"); + + if (!device) + return_VALUE(-EINVAL); + + ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); + if (!ec) + return_VALUE(-ENOMEM); + memset(ec, 0, sizeof(union acpi_ec)); + + ec->common.handle = device->handle; + ec->common.uid = -1; + spin_lock_init(&ec->polling.lock); + strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); + strcpy(acpi_device_class(device), ACPI_EC_CLASS); + acpi_driver_data(device) = ec; + + /* Use the global lock for all EC transactions? */ + acpi_evaluate_integer(ec->common.handle, "_GLK", NULL, + &ec->common.global_lock); + + /* If our UID matches the UID for the ECDT-enumerated EC, + we now have the *real* EC info, so kill the makeshift one. */ + acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid); + if (ec_ecdt && ec_ecdt->common.uid == uid) { + acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, + ACPI_ADR_SPACE_EC, + &acpi_ec_space_handler); + + acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, + &acpi_ec_gpe_handler); + + kfree(ec_ecdt); + } + + /* Get GPE bit assignment (EC events). */ + /* TODO: Add support for _GPE returning a package */ + status = + acpi_evaluate_integer(ec->common.handle, "_GPE", NULL, + &ec->common.gpe_bit); + if (ACPI_FAILURE(status)) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Error obtaining GPE bit assignment\n")); + result = -ENODEV; + goto end; + } + + result = acpi_ec_add_fs(device); + if (result) + goto end; + + printk(KERN_INFO PREFIX "%s [%s] (gpe %d)\n", + acpi_device_name(device), acpi_device_bid(device), + (u32) ec->common.gpe_bit); + + if (!first_ec) + first_ec = device; + + end: + if (result) + kfree(ec); + + return_VALUE(result); +} +static int acpi_ec_burst_add(struct acpi_device *device) +{ + int result = 0; + acpi_status status = AE_OK; + union acpi_ec *ec = NULL; + unsigned long uid; + + ACPI_FUNCTION_TRACE("acpi_ec_add"); + + if (!device) + return_VALUE(-EINVAL); + + ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); + if (!ec) + return_VALUE(-ENOMEM); + memset(ec, 0, sizeof(union acpi_ec)); + + ec->common.handle = device->handle; + ec->common.uid = -1; + atomic_set(&ec->burst.pending_gpe, 0); + atomic_set(&ec->burst.leaving_burst, 1); + init_MUTEX(&ec->burst.sem); + init_waitqueue_head(&ec->burst.wait); + strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); + strcpy(acpi_device_class(device), ACPI_EC_CLASS); + acpi_driver_data(device) = ec; + + /* Use the global lock for all EC transactions? */ + acpi_evaluate_integer(ec->common.handle, "_GLK", NULL, + &ec->common.global_lock); + + /* If our UID matches the UID for the ECDT-enumerated EC, + we now have the *real* EC info, so kill the makeshift one. */ + acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid); + if (ec_ecdt && ec_ecdt->common.uid == uid) { + acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, + ACPI_ADR_SPACE_EC, + &acpi_ec_space_handler); + + acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, + &acpi_ec_gpe_handler); + + kfree(ec_ecdt); + } + + /* Get GPE bit assignment (EC events). */ + /* TODO: Add support for _GPE returning a package */ + status = + acpi_evaluate_integer(ec->common.handle, "_GPE", NULL, + &ec->common.gpe_bit); + if (ACPI_FAILURE(status)) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Error obtaining GPE bit assignment\n")); + result = -ENODEV; + goto end; + } + + result = acpi_ec_add_fs(device); + if (result) + goto end; + + printk("burst-mode-ec-10-Aug\n"); + printk(KERN_INFO PREFIX "%s [%s] (gpe %d)\n", + acpi_device_name(device), acpi_device_bid(device), + (u32) ec->common.gpe_bit); + + if (!first_ec) + first_ec = device; + + end: + if (result) + kfree(ec); + + return_VALUE(result); +} + +static int acpi_ec_remove(struct acpi_device *device, int type) +{ + union acpi_ec *ec = NULL; + + ACPI_FUNCTION_TRACE("acpi_ec_remove"); + + if (!device) + return_VALUE(-EINVAL); + + ec = acpi_driver_data(device); + + acpi_ec_remove_fs(device); + + kfree(ec); + + return_VALUE(0); +} + +static acpi_status +acpi_ec_io_ports(struct acpi_resource *resource, void *context) +{ + union acpi_ec *ec = (union acpi_ec *)context; + struct acpi_generic_address *addr; + + if (resource->id != ACPI_RSTYPE_IO) { + return AE_OK; + } + + /* + * The first address region returned is the data port, and + * the second address region returned is the status/command + * port. + */ + if (ec->common.data_addr.register_bit_width == 0) { + addr = &ec->common.data_addr; + } else if (ec->common.command_addr.register_bit_width == 0) { + addr = &ec->common.command_addr; + } else { + return AE_CTRL_TERMINATE; + } + + addr->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO; + addr->register_bit_width = 8; + addr->register_bit_offset = 0; + addr->address = resource->data.io.min_base_address; + + return AE_OK; +} + +static int acpi_ec_start(struct acpi_device *device) +{ + acpi_status status = AE_OK; + union acpi_ec *ec = NULL; + + ACPI_FUNCTION_TRACE("acpi_ec_start"); + + if (!device) + return_VALUE(-EINVAL); + + ec = acpi_driver_data(device); + + if (!ec) + return_VALUE(-EINVAL); + + /* + * Get I/O port addresses. Convert to GAS format. + */ + status = acpi_walk_resources(ec->common.handle, METHOD_NAME__CRS, + acpi_ec_io_ports, ec); + if (ACPI_FAILURE(status) + || ec->common.command_addr.register_bit_width == 0) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Error getting I/O port addresses")); + return_VALUE(-ENODEV); + } + + ec->common.status_addr = ec->common.command_addr; + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x\n", + (u32) ec->common.gpe_bit, + (u32) ec->common.command_addr.address, + (u32) ec->common.data_addr.address)); + + /* + * Install GPE handler + */ + status = acpi_install_gpe_handler(NULL, ec->common.gpe_bit, + ACPI_GPE_EDGE_TRIGGERED, + &acpi_ec_gpe_handler, ec); + if (ACPI_FAILURE(status)) { + return_VALUE(-ENODEV); + } + acpi_set_gpe_type(NULL, ec->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME); + acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); + + status = acpi_install_address_space_handler(ec->common.handle, + ACPI_ADR_SPACE_EC, + &acpi_ec_space_handler, + &acpi_ec_space_setup, ec); + if (ACPI_FAILURE(status)) { + acpi_remove_gpe_handler(NULL, ec->common.gpe_bit, + &acpi_ec_gpe_handler); + return_VALUE(-ENODEV); + } + + return_VALUE(AE_OK); +} + +static int acpi_ec_stop(struct acpi_device *device, int type) +{ + acpi_status status = AE_OK; + union acpi_ec *ec = NULL; + + ACPI_FUNCTION_TRACE("acpi_ec_stop"); + + if (!device) + return_VALUE(-EINVAL); + + ec = acpi_driver_data(device); + + status = acpi_remove_address_space_handler(ec->common.handle, + ACPI_ADR_SPACE_EC, + &acpi_ec_space_handler); + if (ACPI_FAILURE(status)) + return_VALUE(-ENODEV); + + status = + acpi_remove_gpe_handler(NULL, ec->common.gpe_bit, + &acpi_ec_gpe_handler); + if (ACPI_FAILURE(status)) + return_VALUE(-ENODEV); + + return_VALUE(0); +} + +static acpi_status __init +acpi_fake_ecdt_callback(acpi_handle handle, + u32 Level, void *context, void **retval) +{ + + if (acpi_ec_polling_mode) + return acpi_fake_ecdt_polling_callback(handle, + Level, context, retval); + else + return acpi_fake_ecdt_burst_callback(handle, + Level, context, retval); +} + +static acpi_status __init +acpi_fake_ecdt_polling_callback(acpi_handle handle, + u32 Level, void *context, void **retval) +{ + acpi_status status; + + status = acpi_walk_resources(handle, METHOD_NAME__CRS, + acpi_ec_io_ports, ec_ecdt); + if (ACPI_FAILURE(status)) + return status; + ec_ecdt->common.status_addr = ec_ecdt->common.command_addr; + + ec_ecdt->common.uid = -1; + acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid); + + status = + acpi_evaluate_integer(handle, "_GPE", NULL, + &ec_ecdt->common.gpe_bit); + if (ACPI_FAILURE(status)) + return status; + spin_lock_init(&ec_ecdt->polling.lock); + ec_ecdt->common.global_lock = TRUE; + ec_ecdt->common.handle = handle; + + printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n", + (u32) ec_ecdt->common.gpe_bit, + (u32) ec_ecdt->common.command_addr.address, + (u32) ec_ecdt->common.data_addr.address); + + return AE_CTRL_TERMINATE; +} + +static acpi_status __init +acpi_fake_ecdt_burst_callback(acpi_handle handle, + u32 Level, void *context, void **retval) +{ + acpi_status status; + + init_MUTEX(&ec_ecdt->burst.sem); + init_waitqueue_head(&ec_ecdt->burst.wait); + status = acpi_walk_resources(handle, METHOD_NAME__CRS, + acpi_ec_io_ports, ec_ecdt); + if (ACPI_FAILURE(status)) + return status; + ec_ecdt->common.status_addr = ec_ecdt->common.command_addr; + + ec_ecdt->common.uid = -1; + acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid); + + status = + acpi_evaluate_integer(handle, "_GPE", NULL, + &ec_ecdt->common.gpe_bit); + if (ACPI_FAILURE(status)) + return status; + ec_ecdt->common.global_lock = TRUE; + ec_ecdt->common.handle = handle; + + printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n", + (u32) ec_ecdt->common.gpe_bit, + (u32) ec_ecdt->common.command_addr.address, + (u32) ec_ecdt->common.data_addr.address); + + return AE_CTRL_TERMINATE; +} + +/* + * Some BIOS (such as some from Gateway laptops) access EC region very early + * such as in BAT0._INI or EC._INI before an EC device is found and + * do not provide an ECDT. According to ACPI spec, ECDT isn't mandatorily + * required, but if EC regison is accessed early, it is required. + * The routine tries to workaround the BIOS bug by pre-scan EC device + * It assumes that _CRS, _HID, _GPE, _UID methods of EC don't touch any + * op region (since _REG isn't invoked yet). The assumption is true for + * all systems found. + */ +static int __init acpi_ec_fake_ecdt(void) +{ + acpi_status status; + int ret = 0; + + printk(KERN_INFO PREFIX "Try to make an fake ECDT\n"); + + ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); + if (!ec_ecdt) { + ret = -ENOMEM; + goto error; + } + memset(ec_ecdt, 0, sizeof(union acpi_ec)); + + status = acpi_get_devices(ACPI_EC_HID, + acpi_fake_ecdt_callback, NULL, NULL); + if (ACPI_FAILURE(status)) { + kfree(ec_ecdt); + ec_ecdt = NULL; + ret = -ENODEV; + goto error; + } + return 0; + error: + printk(KERN_ERR PREFIX "Can't make an fake ECDT\n"); + return ret; +} + +static int __init acpi_ec_get_real_ecdt(void) +{ + if (acpi_ec_polling_mode) + return acpi_ec_polling_get_real_ecdt(); + else + return acpi_ec_burst_get_real_ecdt(); +} + +static int __init acpi_ec_polling_get_real_ecdt(void) +{ + acpi_status status; + struct acpi_table_ecdt *ecdt_ptr; + + status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, + (struct acpi_table_header **) + &ecdt_ptr); + if (ACPI_FAILURE(status)) + return -ENODEV; + + printk(KERN_INFO PREFIX "Found ECDT\n"); + + /* + * Generate a temporary ec context to use until the namespace is scanned + */ + ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); + if (!ec_ecdt) + return -ENOMEM; + memset(ec_ecdt, 0, sizeof(union acpi_ec)); + + ec_ecdt->common.command_addr = ecdt_ptr->ec_control; + ec_ecdt->common.status_addr = ecdt_ptr->ec_control; + ec_ecdt->common.data_addr = ecdt_ptr->ec_data; + ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit; + spin_lock_init(&ec_ecdt->polling.lock); + /* use the GL just to be safe */ + ec_ecdt->common.global_lock = TRUE; + ec_ecdt->common.uid = ecdt_ptr->uid; + + status = + acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle); + if (ACPI_FAILURE(status)) { + goto error; + } + + return 0; + error: + printk(KERN_ERR PREFIX "Could not use ECDT\n"); + kfree(ec_ecdt); + ec_ecdt = NULL; + + return -ENODEV; +} + +static int __init acpi_ec_burst_get_real_ecdt(void) +{ + acpi_status status; + struct acpi_table_ecdt *ecdt_ptr; + + status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, + (struct acpi_table_header **) + &ecdt_ptr); + if (ACPI_FAILURE(status)) + return -ENODEV; + + printk(KERN_INFO PREFIX "Found ECDT\n"); + + /* + * Generate a temporary ec context to use until the namespace is scanned + */ + ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); + if (!ec_ecdt) + return -ENOMEM; + memset(ec_ecdt, 0, sizeof(union acpi_ec)); + + init_MUTEX(&ec_ecdt->burst.sem); + init_waitqueue_head(&ec_ecdt->burst.wait); + ec_ecdt->common.command_addr = ecdt_ptr->ec_control; + ec_ecdt->common.status_addr = ecdt_ptr->ec_control; + ec_ecdt->common.data_addr = ecdt_ptr->ec_data; + ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit; + /* use the GL just to be safe */ + ec_ecdt->common.global_lock = TRUE; + ec_ecdt->common.uid = ecdt_ptr->uid; + + status = + acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle); + if (ACPI_FAILURE(status)) { + goto error; + } + + return 0; + error: + printk(KERN_ERR PREFIX "Could not use ECDT\n"); + kfree(ec_ecdt); + ec_ecdt = NULL; + + return -ENODEV; +} + +static int __initdata acpi_fake_ecdt_enabled; +int __init acpi_ec_ecdt_probe(void) +{ + acpi_status status; + int ret; + + ret = acpi_ec_get_real_ecdt(); + /* Try to make a fake ECDT */ + if (ret && acpi_fake_ecdt_enabled) { + ret = acpi_ec_fake_ecdt(); + } + + if (ret) + return 0; + + /* + * Install GPE handler + */ + status = acpi_install_gpe_handler(NULL, ec_ecdt->common.gpe_bit, + ACPI_GPE_EDGE_TRIGGERED, + &acpi_ec_gpe_handler, ec_ecdt); + if (ACPI_FAILURE(status)) { + goto error; + } + acpi_set_gpe_type(NULL, ec_ecdt->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME); + acpi_enable_gpe(NULL, ec_ecdt->common.gpe_bit, ACPI_NOT_ISR); + + status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT, + ACPI_ADR_SPACE_EC, + &acpi_ec_space_handler, + &acpi_ec_space_setup, + ec_ecdt); + if (ACPI_FAILURE(status)) { + acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, + &acpi_ec_gpe_handler); + goto error; + } + + return 0; + + error: + printk(KERN_ERR PREFIX "Could not use ECDT\n"); + kfree(ec_ecdt); + ec_ecdt = NULL; + + return -ENODEV; +} + +static int __init acpi_ec_init(void) +{ + int result = 0; + + ACPI_FUNCTION_TRACE("acpi_ec_init"); + + if (acpi_disabled) + return_VALUE(0); + + acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir); + if (!acpi_ec_dir) + return_VALUE(-ENODEV); + + /* Now register the driver for the EC */ + result = acpi_bus_register_driver(&acpi_ec_driver); + if (result < 0) { + remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); + return_VALUE(-ENODEV); + } + + return_VALUE(result); +} + +subsys_initcall(acpi_ec_init); + +/* EC driver currently not unloadable */ +#if 0 +static void __exit acpi_ec_exit(void) +{ + ACPI_FUNCTION_TRACE("acpi_ec_exit"); + + acpi_bus_unregister_driver(&acpi_ec_driver); + + remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); + + return_VOID; +} +#endif /* 0 */ + +static int __init acpi_fake_ecdt_setup(char *str) +{ + acpi_fake_ecdt_enabled = 1; + return 0; +} + +__setup("acpi_fake_ecdt", acpi_fake_ecdt_setup); +static int __init acpi_ec_set_polling_mode(char *str) +{ + int burst; + + if (!get_option(&str, &burst)) + return 0; + + if (burst) { + acpi_ec_polling_mode = EC_BURST; + acpi_ec_driver.ops.add = acpi_ec_burst_add; + } else { + acpi_ec_polling_mode = EC_POLLING; + acpi_ec_driver.ops.add = acpi_ec_polling_add; + } + printk(KERN_INFO PREFIX "EC %s mode.\n", burst ? "burst" : "polling"); + return 0; +} + +__setup("ec_burst=", acpi_ec_set_polling_mode); diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c deleted file mode 100644 index 7e1a445..0000000 --- a/drivers/acpi/ec.c +++ /dev/null @@ -1,1592 +0,0 @@ -/* - * acpi_ec.c - ACPI Embedded Controller Driver ($Revision: 38 $) - * - * Copyright (C) 2004 Luming Yu - * Copyright (C) 2001, 2002 Andy Grover - * Copyright (C) 2001, 2002 Paul Diefenbaugh - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define _COMPONENT ACPI_EC_COMPONENT -ACPI_MODULE_NAME("acpi_ec") -#define ACPI_EC_COMPONENT 0x00100000 -#define ACPI_EC_CLASS "embedded_controller" -#define ACPI_EC_HID "PNP0C09" -#define ACPI_EC_DRIVER_NAME "ACPI Embedded Controller Driver" -#define ACPI_EC_DEVICE_NAME "Embedded Controller" -#define ACPI_EC_FILE_INFO "info" -#define ACPI_EC_FLAG_OBF 0x01 /* Output buffer full */ -#define ACPI_EC_FLAG_IBF 0x02 /* Input buffer full */ -#define ACPI_EC_FLAG_BURST 0x10 /* burst mode */ -#define ACPI_EC_FLAG_SCI 0x20 /* EC-SCI occurred */ -#define ACPI_EC_EVENT_OBF 0x01 /* Output buffer full */ -#define ACPI_EC_EVENT_IBE 0x02 /* Input buffer empty */ -#define ACPI_EC_DELAY 50 /* Wait 50ms max. during EC ops */ -#define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ -#define ACPI_EC_UDELAY 100 /* Poll @ 100us increments */ -#define ACPI_EC_UDELAY_COUNT 1000 /* Wait 10ms max. during EC ops */ -#define ACPI_EC_COMMAND_READ 0x80 -#define ACPI_EC_COMMAND_WRITE 0x81 -#define ACPI_EC_BURST_ENABLE 0x82 -#define ACPI_EC_BURST_DISABLE 0x83 -#define ACPI_EC_COMMAND_QUERY 0x84 -#define EC_POLLING 0xFF -#define EC_BURST 0x00 -static int acpi_ec_remove(struct acpi_device *device, int type); -static int acpi_ec_start(struct acpi_device *device); -static int acpi_ec_stop(struct acpi_device *device, int type); -static int acpi_ec_burst_add(struct acpi_device *device); -static int acpi_ec_polling_add(struct acpi_device *device); - -static struct acpi_driver acpi_ec_driver = { - .name = ACPI_EC_DRIVER_NAME, - .class = ACPI_EC_CLASS, - .ids = ACPI_EC_HID, - .ops = { - .add = acpi_ec_polling_add, - .remove = acpi_ec_remove, - .start = acpi_ec_start, - .stop = acpi_ec_stop, - }, -}; -union acpi_ec { - struct { - u32 mode; - acpi_handle handle; - unsigned long uid; - unsigned long gpe_bit; - struct acpi_generic_address status_addr; - struct acpi_generic_address command_addr; - struct acpi_generic_address data_addr; - unsigned long global_lock; - } common; - - struct { - u32 mode; - acpi_handle handle; - unsigned long uid; - unsigned long gpe_bit; - struct acpi_generic_address status_addr; - struct acpi_generic_address command_addr; - struct acpi_generic_address data_addr; - unsigned long global_lock; - unsigned int expect_event; - atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */ - atomic_t pending_gpe; - struct semaphore sem; - wait_queue_head_t wait; - } burst; - - struct { - u32 mode; - acpi_handle handle; - unsigned long uid; - unsigned long gpe_bit; - struct acpi_generic_address status_addr; - struct acpi_generic_address command_addr; - struct acpi_generic_address data_addr; - unsigned long global_lock; - spinlock_t lock; - } polling; -}; - -static int acpi_ec_polling_wait(union acpi_ec *ec, u8 event); -static int acpi_ec_burst_wait(union acpi_ec *ec, unsigned int event); -static int acpi_ec_polling_read(union acpi_ec *ec, u8 address, u32 * data); -static int acpi_ec_burst_read(union acpi_ec *ec, u8 address, u32 * data); -static int acpi_ec_polling_write(union acpi_ec *ec, u8 address, u8 data); -static int acpi_ec_burst_write(union acpi_ec *ec, u8 address, u8 data); -static int acpi_ec_polling_query(union acpi_ec *ec, u32 * data); -static int acpi_ec_burst_query(union acpi_ec *ec, u32 * data); -static void acpi_ec_gpe_polling_query(void *ec_cxt); -static void acpi_ec_gpe_burst_query(void *ec_cxt); -static u32 acpi_ec_gpe_polling_handler(void *data); -static u32 acpi_ec_gpe_burst_handler(void *data); -static acpi_status __init -acpi_fake_ecdt_polling_callback(acpi_handle handle, - u32 Level, void *context, void **retval); - -static acpi_status __init -acpi_fake_ecdt_burst_callback(acpi_handle handle, - u32 Level, void *context, void **retval); - -static int __init acpi_ec_polling_get_real_ecdt(void); -static int __init acpi_ec_burst_get_real_ecdt(void); -/* If we find an EC via the ECDT, we need to keep a ptr to its context */ -static union acpi_ec *ec_ecdt; - -/* External interfaces use first EC only, so remember */ -static struct acpi_device *first_ec; -static int acpi_ec_polling_mode = EC_POLLING; - -/* -------------------------------------------------------------------------- - Transaction Management - -------------------------------------------------------------------------- */ - -static inline u32 acpi_ec_read_status(union acpi_ec *ec) -{ - u32 status = 0; - - acpi_hw_low_level_read(8, &status, &ec->common.status_addr); - return status; -} - -static int acpi_ec_wait(union acpi_ec *ec, u8 event) -{ - if (acpi_ec_polling_mode) - return acpi_ec_polling_wait(ec, event); - else - return acpi_ec_burst_wait(ec, event); -} - -static int acpi_ec_polling_wait(union acpi_ec *ec, u8 event) -{ - u32 acpi_ec_status = 0; - u32 i = ACPI_EC_UDELAY_COUNT; - - if (!ec) - return -EINVAL; - - /* Poll the EC status register waiting for the event to occur. */ - switch (event) { - case ACPI_EC_EVENT_OBF: - do { - acpi_hw_low_level_read(8, &acpi_ec_status, - &ec->common.status_addr); - if (acpi_ec_status & ACPI_EC_FLAG_OBF) - return 0; - udelay(ACPI_EC_UDELAY); - } while (--i > 0); - break; - case ACPI_EC_EVENT_IBE: - do { - acpi_hw_low_level_read(8, &acpi_ec_status, - &ec->common.status_addr); - if (!(acpi_ec_status & ACPI_EC_FLAG_IBF)) - return 0; - udelay(ACPI_EC_UDELAY); - } while (--i > 0); - break; - default: - return -EINVAL; - } - - return -ETIME; -} -static int acpi_ec_burst_wait(union acpi_ec *ec, unsigned int event) -{ - int result = 0; - - ACPI_FUNCTION_TRACE("acpi_ec_wait"); - - ec->burst.expect_event = event; - smp_mb(); - - switch (event) { - case ACPI_EC_EVENT_OBF: - if (acpi_ec_read_status(ec) & event) { - ec->burst.expect_event = 0; - return_VALUE(0); - } - break; - - case ACPI_EC_EVENT_IBE: - if (~acpi_ec_read_status(ec) & event) { - ec->burst.expect_event = 0; - return_VALUE(0); - } - break; - } - - result = wait_event_timeout(ec->burst.wait, - !ec->burst.expect_event, - msecs_to_jiffies(ACPI_EC_DELAY)); - - ec->burst.expect_event = 0; - smp_mb(); - - /* - * Verify that the event in question has actually happened by - * querying EC status. Do the check even if operation timed-out - * to make sure that we did not miss interrupt. - */ - switch (event) { - case ACPI_EC_EVENT_OBF: - if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_OBF) - return_VALUE(0); - break; - - case ACPI_EC_EVENT_IBE: - if (~acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) - return_VALUE(0); - break; - } - - return_VALUE(-ETIME); -} - -static int acpi_ec_enter_burst_mode(union acpi_ec *ec) -{ - u32 tmp = 0; - int status = 0; - - ACPI_FUNCTION_TRACE("acpi_ec_enter_burst_mode"); - - status = acpi_ec_read_status(ec); - if (status != -EINVAL && !(status & ACPI_EC_FLAG_BURST)) { - status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (status) - goto end; - acpi_hw_low_level_write(8, ACPI_EC_BURST_ENABLE, - &ec->common.command_addr); - status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); - if (status) - return_VALUE(-EINVAL); - acpi_hw_low_level_read(8, &tmp, &ec->common.data_addr); - if (tmp != 0x90) { /* Burst ACK byte */ - return_VALUE(-EINVAL); - } - } - - atomic_set(&ec->burst.leaving_burst, 0); - return_VALUE(0); - end: - printk("Error in acpi_ec_wait\n"); - return_VALUE(-1); -} - -static int acpi_ec_leave_burst_mode(union acpi_ec *ec) -{ - - ACPI_FUNCTION_TRACE("acpi_ec_leave_burst_mode"); - - atomic_set(&ec->burst.leaving_burst, 1); - return_VALUE(0); -} - -static int acpi_ec_read(union acpi_ec *ec, u8 address, u32 * data) -{ - if (acpi_ec_polling_mode) - return acpi_ec_polling_read(ec, address, data); - else - return acpi_ec_burst_read(ec, address, data); -} -static int acpi_ec_write(union acpi_ec *ec, u8 address, u8 data) -{ - if (acpi_ec_polling_mode) - return acpi_ec_polling_write(ec, address, data); - else - return acpi_ec_burst_write(ec, address, data); -} -static int acpi_ec_polling_read(union acpi_ec *ec, u8 address, u32 * data) -{ - acpi_status status = AE_OK; - int result = 0; - unsigned long flags = 0; - u32 glk = 0; - - ACPI_FUNCTION_TRACE("acpi_ec_read"); - - if (!ec || !data) - return_VALUE(-EINVAL); - - *data = 0; - - if (ec->common.global_lock) { - status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); - } - - spin_lock_irqsave(&ec->polling.lock, flags); - - acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, - &ec->common.command_addr); - result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (result) - goto end; - - acpi_hw_low_level_write(8, address, &ec->common.data_addr); - result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); - if (result) - goto end; - - acpi_hw_low_level_read(8, data, &ec->common.data_addr); - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n", - *data, address)); - - end: - spin_unlock_irqrestore(&ec->polling.lock, flags); - - if (ec->common.global_lock) - acpi_release_global_lock(glk); - - return_VALUE(result); -} - -static int acpi_ec_polling_write(union acpi_ec *ec, u8 address, u8 data) -{ - int result = 0; - acpi_status status = AE_OK; - unsigned long flags = 0; - u32 glk = 0; - - ACPI_FUNCTION_TRACE("acpi_ec_write"); - - if (!ec) - return_VALUE(-EINVAL); - - if (ec->common.global_lock) { - status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); - } - - spin_lock_irqsave(&ec->polling.lock, flags); - - acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, - &ec->common.command_addr); - result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (result) - goto end; - - acpi_hw_low_level_write(8, address, &ec->common.data_addr); - result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (result) - goto end; - - acpi_hw_low_level_write(8, data, &ec->common.data_addr); - result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (result) - goto end; - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n", - data, address)); - - end: - spin_unlock_irqrestore(&ec->polling.lock, flags); - - if (ec->common.global_lock) - acpi_release_global_lock(glk); - - return_VALUE(result); -} - -static int acpi_ec_burst_read(union acpi_ec *ec, u8 address, u32 * data) -{ - int status = 0; - u32 glk; - - ACPI_FUNCTION_TRACE("acpi_ec_read"); - - if (!ec || !data) - return_VALUE(-EINVAL); - - *data = 0; - - if (ec->common.global_lock) { - status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); - } - - WARN_ON(in_interrupt()); - down(&ec->burst.sem); - - acpi_ec_enter_burst_mode(ec); - status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (status) { - printk("read EC, IB not empty\n"); - goto end; - } - acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, - &ec->common.command_addr); - status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (status) { - printk("read EC, IB not empty\n"); - } - - acpi_hw_low_level_write(8, address, &ec->common.data_addr); - status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); - if (status) { - printk("read EC, OB not full\n"); - goto end; - } - acpi_hw_low_level_read(8, data, &ec->common.data_addr); - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Read [%02x] from address [%02x]\n", - *data, address)); - - end: - acpi_ec_leave_burst_mode(ec); - up(&ec->burst.sem); - - if (ec->common.global_lock) - acpi_release_global_lock(glk); - - return_VALUE(status); -} - -static int acpi_ec_burst_write(union acpi_ec *ec, u8 address, u8 data) -{ - int status = 0; - u32 glk; - - ACPI_FUNCTION_TRACE("acpi_ec_write"); - - if (!ec) - return_VALUE(-EINVAL); - - if (ec->common.global_lock) { - status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); - } - - WARN_ON(in_interrupt()); - down(&ec->burst.sem); - - acpi_ec_enter_burst_mode(ec); - - status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (status) { - printk("write EC, IB not empty\n"); - } - acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, - &ec->common.command_addr); - status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (status) { - printk("write EC, IB not empty\n"); - } - - acpi_hw_low_level_write(8, address, &ec->common.data_addr); - status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (status) { - printk("write EC, IB not empty\n"); - } - - acpi_hw_low_level_write(8, data, &ec->common.data_addr); - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Wrote [%02x] to address [%02x]\n", - data, address)); - - acpi_ec_leave_burst_mode(ec); - up(&ec->burst.sem); - - if (ec->common.global_lock) - acpi_release_global_lock(glk); - - return_VALUE(status); -} - -/* - * Externally callable EC access functions. For now, assume 1 EC only - */ -int ec_read(u8 addr, u8 * val) -{ - union acpi_ec *ec; - int err; - u32 temp_data; - - if (!first_ec) - return -ENODEV; - - ec = acpi_driver_data(first_ec); - - err = acpi_ec_read(ec, addr, &temp_data); - - if (!err) { - *val = temp_data; - return 0; - } else - return err; -} - -EXPORT_SYMBOL(ec_read); - -int ec_write(u8 addr, u8 val) -{ - union acpi_ec *ec; - int err; - - if (!first_ec) - return -ENODEV; - - ec = acpi_driver_data(first_ec); - - err = acpi_ec_write(ec, addr, val); - - return err; -} - -EXPORT_SYMBOL(ec_write); - -static int acpi_ec_query(union acpi_ec *ec, u32 * data) -{ - if (acpi_ec_polling_mode) - return acpi_ec_polling_query(ec, data); - else - return acpi_ec_burst_query(ec, data); -} -static int acpi_ec_polling_query(union acpi_ec *ec, u32 * data) -{ - int result = 0; - acpi_status status = AE_OK; - unsigned long flags = 0; - u32 glk = 0; - - ACPI_FUNCTION_TRACE("acpi_ec_query"); - - if (!ec || !data) - return_VALUE(-EINVAL); - - *data = 0; - - if (ec->common.global_lock) { - status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); - } - - /* - * Query the EC to find out which _Qxx method we need to evaluate. - * Note that successful completion of the query causes the ACPI_EC_SCI - * bit to be cleared (and thus clearing the interrupt source). - */ - spin_lock_irqsave(&ec->polling.lock, flags); - - acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, - &ec->common.command_addr); - result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); - if (result) - goto end; - - acpi_hw_low_level_read(8, data, &ec->common.data_addr); - if (!*data) - result = -ENODATA; - - end: - spin_unlock_irqrestore(&ec->polling.lock, flags); - - if (ec->common.global_lock) - acpi_release_global_lock(glk); - - return_VALUE(result); -} -static int acpi_ec_burst_query(union acpi_ec *ec, u32 * data) -{ - int status = 0; - u32 glk; - - ACPI_FUNCTION_TRACE("acpi_ec_query"); - - if (!ec || !data) - return_VALUE(-EINVAL); - *data = 0; - - if (ec->common.global_lock) { - status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); - } - - down(&ec->burst.sem); - - status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); - if (status) { - printk("query EC, IB not empty\n"); - goto end; - } - /* - * Query the EC to find out which _Qxx method we need to evaluate. - * Note that successful completion of the query causes the ACPI_EC_SCI - * bit to be cleared (and thus clearing the interrupt source). - */ - acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, - &ec->common.command_addr); - status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); - if (status) { - printk("query EC, OB not full\n"); - goto end; - } - - acpi_hw_low_level_read(8, data, &ec->common.data_addr); - if (!*data) - status = -ENODATA; - - end: - up(&ec->burst.sem); - - if (ec->common.global_lock) - acpi_release_global_lock(glk); - - return_VALUE(status); -} - -/* -------------------------------------------------------------------------- - Event Management - -------------------------------------------------------------------------- */ - -union acpi_ec_query_data { - acpi_handle handle; - u8 data; -}; - -static void acpi_ec_gpe_query(void *ec_cxt) -{ - if (acpi_ec_polling_mode) - acpi_ec_gpe_polling_query(ec_cxt); - else - acpi_ec_gpe_burst_query(ec_cxt); -} - -static void acpi_ec_gpe_polling_query(void *ec_cxt) -{ - union acpi_ec *ec = (union acpi_ec *)ec_cxt; - u32 value = 0; - unsigned long flags = 0; - static char object_name[5] = { '_', 'Q', '0', '0', '\0' }; - const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', - '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' - }; - - ACPI_FUNCTION_TRACE("acpi_ec_gpe_query"); - - if (!ec_cxt) - goto end; - - spin_lock_irqsave(&ec->polling.lock, flags); - acpi_hw_low_level_read(8, &value, &ec->common.command_addr); - spin_unlock_irqrestore(&ec->polling.lock, flags); - - /* TBD: Implement asynch events! - * NOTE: All we care about are EC-SCI's. Other EC events are - * handled via polling (yuck!). This is because some systems - * treat EC-SCIs as level (versus EDGE!) triggered, preventing - * a purely interrupt-driven approach (grumble, grumble). - */ - if (!(value & ACPI_EC_FLAG_SCI)) - goto end; - - if (acpi_ec_query(ec, &value)) - goto end; - - object_name[2] = hex[((value >> 4) & 0x0F)]; - object_name[3] = hex[(value & 0x0F)]; - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name)); - - acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL); - - end: - acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); -} -static void acpi_ec_gpe_burst_query(void *ec_cxt) -{ - union acpi_ec *ec = (union acpi_ec *)ec_cxt; - u32 value; - int result = -ENODATA; - static char object_name[5] = { '_', 'Q', '0', '0', '\0' }; - const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', - '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' - }; - - ACPI_FUNCTION_TRACE("acpi_ec_gpe_query"); - - if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_SCI) - result = acpi_ec_query(ec, &value); - - if (result) - goto end; - - object_name[2] = hex[((value >> 4) & 0x0F)]; - object_name[3] = hex[(value & 0x0F)]; - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name)); - - acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL); - end: - atomic_dec(&ec->burst.pending_gpe); - return; -} - -static u32 acpi_ec_gpe_handler(void *data) -{ - if (acpi_ec_polling_mode) - return acpi_ec_gpe_polling_handler(data); - else - return acpi_ec_gpe_burst_handler(data); -} -static u32 acpi_ec_gpe_polling_handler(void *data) -{ - acpi_status status = AE_OK; - union acpi_ec *ec = (union acpi_ec *)data; - - if (!ec) - return ACPI_INTERRUPT_NOT_HANDLED; - - acpi_disable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); - - status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE, - acpi_ec_gpe_query, ec); - - if (status == AE_OK) - return ACPI_INTERRUPT_HANDLED; - else - return ACPI_INTERRUPT_NOT_HANDLED; -} -static u32 acpi_ec_gpe_burst_handler(void *data) -{ - acpi_status status = AE_OK; - u32 value; - union acpi_ec *ec = (union acpi_ec *)data; - - if (!ec) - return ACPI_INTERRUPT_NOT_HANDLED; - - acpi_clear_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); - value = acpi_ec_read_status(ec); - - switch (ec->burst.expect_event) { - case ACPI_EC_EVENT_OBF: - if (!(value & ACPI_EC_FLAG_OBF)) - break; - case ACPI_EC_EVENT_IBE: - if ((value & ACPI_EC_FLAG_IBF)) - break; - ec->burst.expect_event = 0; - wake_up(&ec->burst.wait); - return ACPI_INTERRUPT_HANDLED; - default: - break; - } - - if (value & ACPI_EC_FLAG_SCI) { - atomic_add(1, &ec->burst.pending_gpe); - status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE, - acpi_ec_gpe_query, ec); - return status == AE_OK ? - ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; - } - acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); - return status == AE_OK ? - ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; -} - -/* -------------------------------------------------------------------------- - Address Space Management - -------------------------------------------------------------------------- */ - -static acpi_status -acpi_ec_space_setup(acpi_handle region_handle, - u32 function, void *handler_context, void **return_context) -{ - /* - * The EC object is in the handler context and is needed - * when calling the acpi_ec_space_handler. - */ - *return_context = (function != ACPI_REGION_DEACTIVATE) ? - handler_context : NULL; - - return AE_OK; -} - -static acpi_status -acpi_ec_space_handler(u32 function, - acpi_physical_address address, - u32 bit_width, - acpi_integer * value, - void *handler_context, void *region_context) -{ - int result = 0; - union acpi_ec *ec = NULL; - u64 temp = *value; - acpi_integer f_v = 0; - int i = 0; - - ACPI_FUNCTION_TRACE("acpi_ec_space_handler"); - - if ((address > 0xFF) || !value || !handler_context) - return_VALUE(AE_BAD_PARAMETER); - - if (bit_width != 8 && acpi_strict) { - printk(KERN_WARNING PREFIX - "acpi_ec_space_handler: bit_width should be 8\n"); - return_VALUE(AE_BAD_PARAMETER); - } - - ec = (union acpi_ec *)handler_context; - - next_byte: - switch (function) { - case ACPI_READ: - temp = 0; - result = acpi_ec_read(ec, (u8) address, (u32 *) & temp); - break; - case ACPI_WRITE: - result = acpi_ec_write(ec, (u8) address, (u8) temp); - break; - default: - result = -EINVAL; - goto out; - break; - } - - bit_width -= 8; - if (bit_width) { - if (function == ACPI_READ) - f_v |= temp << 8 * i; - if (function == ACPI_WRITE) - temp >>= 8; - i++; - address++; - goto next_byte; - } - - if (function == ACPI_READ) { - f_v |= temp << 8 * i; - *value = f_v; - } - - out: - switch (result) { - case -EINVAL: - return_VALUE(AE_BAD_PARAMETER); - break; - case -ENODEV: - return_VALUE(AE_NOT_FOUND); - break; - case -ETIME: - return_VALUE(AE_TIME); - break; - default: - return_VALUE(AE_OK); - } -} - -/* -------------------------------------------------------------------------- - FS Interface (/proc) - -------------------------------------------------------------------------- */ - -static struct proc_dir_entry *acpi_ec_dir; - -static int acpi_ec_read_info(struct seq_file *seq, void *offset) -{ - union acpi_ec *ec = (union acpi_ec *)seq->private; - - ACPI_FUNCTION_TRACE("acpi_ec_read_info"); - - if (!ec) - goto end; - - seq_printf(seq, "gpe bit: 0x%02x\n", - (u32) ec->common.gpe_bit); - seq_printf(seq, "ports: 0x%02x, 0x%02x\n", - (u32) ec->common.status_addr.address, - (u32) ec->common.data_addr.address); - seq_printf(seq, "use global lock: %s\n", - ec->common.global_lock ? "yes" : "no"); - acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); - - end: - return_VALUE(0); -} - -static int acpi_ec_info_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_ec_read_info, PDE(inode)->data); -} - -static struct file_operations acpi_ec_info_ops = { - .open = acpi_ec_info_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, - .owner = THIS_MODULE, -}; - -static int acpi_ec_add_fs(struct acpi_device *device) -{ - struct proc_dir_entry *entry = NULL; - - ACPI_FUNCTION_TRACE("acpi_ec_add_fs"); - - if (!acpi_device_dir(device)) { - acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), - acpi_ec_dir); - if (!acpi_device_dir(device)) - return_VALUE(-ENODEV); - } - - entry = create_proc_entry(ACPI_EC_FILE_INFO, S_IRUGO, - acpi_device_dir(device)); - if (!entry) - ACPI_DEBUG_PRINT((ACPI_DB_WARN, - "Unable to create '%s' fs entry\n", - ACPI_EC_FILE_INFO)); - else { - entry->proc_fops = &acpi_ec_info_ops; - entry->data = acpi_driver_data(device); - entry->owner = THIS_MODULE; - } - - return_VALUE(0); -} - -static int acpi_ec_remove_fs(struct acpi_device *device) -{ - ACPI_FUNCTION_TRACE("acpi_ec_remove_fs"); - - if (acpi_device_dir(device)) { - remove_proc_entry(ACPI_EC_FILE_INFO, acpi_device_dir(device)); - remove_proc_entry(acpi_device_bid(device), acpi_ec_dir); - acpi_device_dir(device) = NULL; - } - - return_VALUE(0); -} - -/* -------------------------------------------------------------------------- - Driver Interface - -------------------------------------------------------------------------- */ - -static int acpi_ec_polling_add(struct acpi_device *device) -{ - int result = 0; - acpi_status status = AE_OK; - union acpi_ec *ec = NULL; - unsigned long uid; - - ACPI_FUNCTION_TRACE("acpi_ec_add"); - - if (!device) - return_VALUE(-EINVAL); - - ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); - if (!ec) - return_VALUE(-ENOMEM); - memset(ec, 0, sizeof(union acpi_ec)); - - ec->common.handle = device->handle; - ec->common.uid = -1; - spin_lock_init(&ec->polling.lock); - strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); - strcpy(acpi_device_class(device), ACPI_EC_CLASS); - acpi_driver_data(device) = ec; - - /* Use the global lock for all EC transactions? */ - acpi_evaluate_integer(ec->common.handle, "_GLK", NULL, - &ec->common.global_lock); - - /* If our UID matches the UID for the ECDT-enumerated EC, - we now have the *real* EC info, so kill the makeshift one. */ - acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid); - if (ec_ecdt && ec_ecdt->common.uid == uid) { - acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, - ACPI_ADR_SPACE_EC, - &acpi_ec_space_handler); - - acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, - &acpi_ec_gpe_handler); - - kfree(ec_ecdt); - } - - /* Get GPE bit assignment (EC events). */ - /* TODO: Add support for _GPE returning a package */ - status = - acpi_evaluate_integer(ec->common.handle, "_GPE", NULL, - &ec->common.gpe_bit); - if (ACPI_FAILURE(status)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Error obtaining GPE bit assignment\n")); - result = -ENODEV; - goto end; - } - - result = acpi_ec_add_fs(device); - if (result) - goto end; - - printk(KERN_INFO PREFIX "%s [%s] (gpe %d)\n", - acpi_device_name(device), acpi_device_bid(device), - (u32) ec->common.gpe_bit); - - if (!first_ec) - first_ec = device; - - end: - if (result) - kfree(ec); - - return_VALUE(result); -} -static int acpi_ec_burst_add(struct acpi_device *device) -{ - int result = 0; - acpi_status status = AE_OK; - union acpi_ec *ec = NULL; - unsigned long uid; - - ACPI_FUNCTION_TRACE("acpi_ec_add"); - - if (!device) - return_VALUE(-EINVAL); - - ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); - if (!ec) - return_VALUE(-ENOMEM); - memset(ec, 0, sizeof(union acpi_ec)); - - ec->common.handle = device->handle; - ec->common.uid = -1; - atomic_set(&ec->burst.pending_gpe, 0); - atomic_set(&ec->burst.leaving_burst, 1); - init_MUTEX(&ec->burst.sem); - init_waitqueue_head(&ec->burst.wait); - strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); - strcpy(acpi_device_class(device), ACPI_EC_CLASS); - acpi_driver_data(device) = ec; - - /* Use the global lock for all EC transactions? */ - acpi_evaluate_integer(ec->common.handle, "_GLK", NULL, - &ec->common.global_lock); - - /* If our UID matches the UID for the ECDT-enumerated EC, - we now have the *real* EC info, so kill the makeshift one. */ - acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid); - if (ec_ecdt && ec_ecdt->common.uid == uid) { - acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, - ACPI_ADR_SPACE_EC, - &acpi_ec_space_handler); - - acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, - &acpi_ec_gpe_handler); - - kfree(ec_ecdt); - } - - /* Get GPE bit assignment (EC events). */ - /* TODO: Add support for _GPE returning a package */ - status = - acpi_evaluate_integer(ec->common.handle, "_GPE", NULL, - &ec->common.gpe_bit); - if (ACPI_FAILURE(status)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Error obtaining GPE bit assignment\n")); - result = -ENODEV; - goto end; - } - - result = acpi_ec_add_fs(device); - if (result) - goto end; - - printk("burst-mode-ec-10-Aug\n"); - printk(KERN_INFO PREFIX "%s [%s] (gpe %d)\n", - acpi_device_name(device), acpi_device_bid(device), - (u32) ec->common.gpe_bit); - - if (!first_ec) - first_ec = device; - - end: - if (result) - kfree(ec); - - return_VALUE(result); -} - -static int acpi_ec_remove(struct acpi_device *device, int type) -{ - union acpi_ec *ec = NULL; - - ACPI_FUNCTION_TRACE("acpi_ec_remove"); - - if (!device) - return_VALUE(-EINVAL); - - ec = acpi_driver_data(device); - - acpi_ec_remove_fs(device); - - kfree(ec); - - return_VALUE(0); -} - -static acpi_status -acpi_ec_io_ports(struct acpi_resource *resource, void *context) -{ - union acpi_ec *ec = (union acpi_ec *)context; - struct acpi_generic_address *addr; - - if (resource->id != ACPI_RSTYPE_IO) { - return AE_OK; - } - - /* - * The first address region returned is the data port, and - * the second address region returned is the status/command - * port. - */ - if (ec->common.data_addr.register_bit_width == 0) { - addr = &ec->common.data_addr; - } else if (ec->common.command_addr.register_bit_width == 0) { - addr = &ec->common.command_addr; - } else { - return AE_CTRL_TERMINATE; - } - - addr->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO; - addr->register_bit_width = 8; - addr->register_bit_offset = 0; - addr->address = resource->data.io.min_base_address; - - return AE_OK; -} - -static int acpi_ec_start(struct acpi_device *device) -{ - acpi_status status = AE_OK; - union acpi_ec *ec = NULL; - - ACPI_FUNCTION_TRACE("acpi_ec_start"); - - if (!device) - return_VALUE(-EINVAL); - - ec = acpi_driver_data(device); - - if (!ec) - return_VALUE(-EINVAL); - - /* - * Get I/O port addresses. Convert to GAS format. - */ - status = acpi_walk_resources(ec->common.handle, METHOD_NAME__CRS, - acpi_ec_io_ports, ec); - if (ACPI_FAILURE(status) - || ec->common.command_addr.register_bit_width == 0) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Error getting I/O port addresses")); - return_VALUE(-ENODEV); - } - - ec->common.status_addr = ec->common.command_addr; - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x\n", - (u32) ec->common.gpe_bit, - (u32) ec->common.command_addr.address, - (u32) ec->common.data_addr.address)); - - /* - * Install GPE handler - */ - status = acpi_install_gpe_handler(NULL, ec->common.gpe_bit, - ACPI_GPE_EDGE_TRIGGERED, - &acpi_ec_gpe_handler, ec); - if (ACPI_FAILURE(status)) { - return_VALUE(-ENODEV); - } - acpi_set_gpe_type(NULL, ec->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME); - acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR); - - status = acpi_install_address_space_handler(ec->common.handle, - ACPI_ADR_SPACE_EC, - &acpi_ec_space_handler, - &acpi_ec_space_setup, ec); - if (ACPI_FAILURE(status)) { - acpi_remove_gpe_handler(NULL, ec->common.gpe_bit, - &acpi_ec_gpe_handler); - return_VALUE(-ENODEV); - } - - return_VALUE(AE_OK); -} - -static int acpi_ec_stop(struct acpi_device *device, int type) -{ - acpi_status status = AE_OK; - union acpi_ec *ec = NULL; - - ACPI_FUNCTION_TRACE("acpi_ec_stop"); - - if (!device) - return_VALUE(-EINVAL); - - ec = acpi_driver_data(device); - - status = acpi_remove_address_space_handler(ec->common.handle, - ACPI_ADR_SPACE_EC, - &acpi_ec_space_handler); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); - - status = - acpi_remove_gpe_handler(NULL, ec->common.gpe_bit, - &acpi_ec_gpe_handler); - if (ACPI_FAILURE(status)) - return_VALUE(-ENODEV); - - return_VALUE(0); -} - -static acpi_status __init -acpi_fake_ecdt_callback(acpi_handle handle, - u32 Level, void *context, void **retval) -{ - - if (acpi_ec_polling_mode) - return acpi_fake_ecdt_polling_callback(handle, - Level, context, retval); - else - return acpi_fake_ecdt_burst_callback(handle, - Level, context, retval); -} - -static acpi_status __init -acpi_fake_ecdt_polling_callback(acpi_handle handle, - u32 Level, void *context, void **retval) -{ - acpi_status status; - - status = acpi_walk_resources(handle, METHOD_NAME__CRS, - acpi_ec_io_ports, ec_ecdt); - if (ACPI_FAILURE(status)) - return status; - ec_ecdt->common.status_addr = ec_ecdt->common.command_addr; - - ec_ecdt->common.uid = -1; - acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid); - - status = - acpi_evaluate_integer(handle, "_GPE", NULL, - &ec_ecdt->common.gpe_bit); - if (ACPI_FAILURE(status)) - return status; - spin_lock_init(&ec_ecdt->polling.lock); - ec_ecdt->common.global_lock = TRUE; - ec_ecdt->common.handle = handle; - - printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n", - (u32) ec_ecdt->common.gpe_bit, - (u32) ec_ecdt->common.command_addr.address, - (u32) ec_ecdt->common.data_addr.address); - - return AE_CTRL_TERMINATE; -} - -static acpi_status __init -acpi_fake_ecdt_burst_callback(acpi_handle handle, - u32 Level, void *context, void **retval) -{ - acpi_status status; - - init_MUTEX(&ec_ecdt->burst.sem); - init_waitqueue_head(&ec_ecdt->burst.wait); - status = acpi_walk_resources(handle, METHOD_NAME__CRS, - acpi_ec_io_ports, ec_ecdt); - if (ACPI_FAILURE(status)) - return status; - ec_ecdt->common.status_addr = ec_ecdt->common.command_addr; - - ec_ecdt->common.uid = -1; - acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid); - - status = - acpi_evaluate_integer(handle, "_GPE", NULL, - &ec_ecdt->common.gpe_bit); - if (ACPI_FAILURE(status)) - return status; - ec_ecdt->common.global_lock = TRUE; - ec_ecdt->common.handle = handle; - - printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n", - (u32) ec_ecdt->common.gpe_bit, - (u32) ec_ecdt->common.command_addr.address, - (u32) ec_ecdt->common.data_addr.address); - - return AE_CTRL_TERMINATE; -} - -/* - * Some BIOS (such as some from Gateway laptops) access EC region very early - * such as in BAT0._INI or EC._INI before an EC device is found and - * do not provide an ECDT. According to ACPI spec, ECDT isn't mandatorily - * required, but if EC regison is accessed early, it is required. - * The routine tries to workaround the BIOS bug by pre-scan EC device - * It assumes that _CRS, _HID, _GPE, _UID methods of EC don't touch any - * op region (since _REG isn't invoked yet). The assumption is true for - * all systems found. - */ -static int __init acpi_ec_fake_ecdt(void) -{ - acpi_status status; - int ret = 0; - - printk(KERN_INFO PREFIX "Try to make an fake ECDT\n"); - - ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); - if (!ec_ecdt) { - ret = -ENOMEM; - goto error; - } - memset(ec_ecdt, 0, sizeof(union acpi_ec)); - - status = acpi_get_devices(ACPI_EC_HID, - acpi_fake_ecdt_callback, NULL, NULL); - if (ACPI_FAILURE(status)) { - kfree(ec_ecdt); - ec_ecdt = NULL; - ret = -ENODEV; - goto error; - } - return 0; - error: - printk(KERN_ERR PREFIX "Can't make an fake ECDT\n"); - return ret; -} - -static int __init acpi_ec_get_real_ecdt(void) -{ - if (acpi_ec_polling_mode) - return acpi_ec_polling_get_real_ecdt(); - else - return acpi_ec_burst_get_real_ecdt(); -} - -static int __init acpi_ec_polling_get_real_ecdt(void) -{ - acpi_status status; - struct acpi_table_ecdt *ecdt_ptr; - - status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, - (struct acpi_table_header **) - &ecdt_ptr); - if (ACPI_FAILURE(status)) - return -ENODEV; - - printk(KERN_INFO PREFIX "Found ECDT\n"); - - /* - * Generate a temporary ec context to use until the namespace is scanned - */ - ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); - if (!ec_ecdt) - return -ENOMEM; - memset(ec_ecdt, 0, sizeof(union acpi_ec)); - - ec_ecdt->common.command_addr = ecdt_ptr->ec_control; - ec_ecdt->common.status_addr = ecdt_ptr->ec_control; - ec_ecdt->common.data_addr = ecdt_ptr->ec_data; - ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit; - spin_lock_init(&ec_ecdt->polling.lock); - /* use the GL just to be safe */ - ec_ecdt->common.global_lock = TRUE; - ec_ecdt->common.uid = ecdt_ptr->uid; - - status = - acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle); - if (ACPI_FAILURE(status)) { - goto error; - } - - return 0; - error: - printk(KERN_ERR PREFIX "Could not use ECDT\n"); - kfree(ec_ecdt); - ec_ecdt = NULL; - - return -ENODEV; -} - -static int __init acpi_ec_burst_get_real_ecdt(void) -{ - acpi_status status; - struct acpi_table_ecdt *ecdt_ptr; - - status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING, - (struct acpi_table_header **) - &ecdt_ptr); - if (ACPI_FAILURE(status)) - return -ENODEV; - - printk(KERN_INFO PREFIX "Found ECDT\n"); - - /* - * Generate a temporary ec context to use until the namespace is scanned - */ - ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL); - if (!ec_ecdt) - return -ENOMEM; - memset(ec_ecdt, 0, sizeof(union acpi_ec)); - - init_MUTEX(&ec_ecdt->burst.sem); - init_waitqueue_head(&ec_ecdt->burst.wait); - ec_ecdt->common.command_addr = ecdt_ptr->ec_control; - ec_ecdt->common.status_addr = ecdt_ptr->ec_control; - ec_ecdt->common.data_addr = ecdt_ptr->ec_data; - ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit; - /* use the GL just to be safe */ - ec_ecdt->common.global_lock = TRUE; - ec_ecdt->common.uid = ecdt_ptr->uid; - - status = - acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle); - if (ACPI_FAILURE(status)) { - goto error; - } - - return 0; - error: - printk(KERN_ERR PREFIX "Could not use ECDT\n"); - kfree(ec_ecdt); - ec_ecdt = NULL; - - return -ENODEV; -} - -static int __initdata acpi_fake_ecdt_enabled; -int __init acpi_ec_ecdt_probe(void) -{ - acpi_status status; - int ret; - - ret = acpi_ec_get_real_ecdt(); - /* Try to make a fake ECDT */ - if (ret && acpi_fake_ecdt_enabled) { - ret = acpi_ec_fake_ecdt(); - } - - if (ret) - return 0; - - /* - * Install GPE handler - */ - status = acpi_install_gpe_handler(NULL, ec_ecdt->common.gpe_bit, - ACPI_GPE_EDGE_TRIGGERED, - &acpi_ec_gpe_handler, ec_ecdt); - if (ACPI_FAILURE(status)) { - goto error; - } - acpi_set_gpe_type(NULL, ec_ecdt->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME); - acpi_enable_gpe(NULL, ec_ecdt->common.gpe_bit, ACPI_NOT_ISR); - - status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT, - ACPI_ADR_SPACE_EC, - &acpi_ec_space_handler, - &acpi_ec_space_setup, - ec_ecdt); - if (ACPI_FAILURE(status)) { - acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit, - &acpi_ec_gpe_handler); - goto error; - } - - return 0; - - error: - printk(KERN_ERR PREFIX "Could not use ECDT\n"); - kfree(ec_ecdt); - ec_ecdt = NULL; - - return -ENODEV; -} - -static int __init acpi_ec_init(void) -{ - int result = 0; - - ACPI_FUNCTION_TRACE("acpi_ec_init"); - - if (acpi_disabled) - return_VALUE(0); - - acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir); - if (!acpi_ec_dir) - return_VALUE(-ENODEV); - - /* Now register the driver for the EC */ - result = acpi_bus_register_driver(&acpi_ec_driver); - if (result < 0) { - remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); - return_VALUE(-ENODEV); - } - - return_VALUE(result); -} - -subsys_initcall(acpi_ec_init); - -/* EC driver currently not unloadable */ -#if 0 -static void __exit acpi_ec_exit(void) -{ - ACPI_FUNCTION_TRACE("acpi_ec_exit"); - - acpi_bus_unregister_driver(&acpi_ec_driver); - - remove_proc_entry(ACPI_EC_CLASS, acpi_root_dir); - - return_VOID; -} -#endif /* 0 */ - -static int __init acpi_fake_ecdt_setup(char *str) -{ - acpi_fake_ecdt_enabled = 1; - return 0; -} - -__setup("acpi_fake_ecdt", acpi_fake_ecdt_setup); -static int __init acpi_ec_set_polling_mode(char *str) -{ - int burst; - - if (!get_option(&str, &burst)) - return 0; - - if (burst) { - acpi_ec_polling_mode = EC_BURST; - acpi_ec_driver.ops.add = acpi_ec_burst_add; - } else { - acpi_ec_polling_mode = EC_POLLING; - acpi_ec_driver.ops.add = acpi_ec_polling_add; - } - printk(KERN_INFO PREFIX "EC %s mode.\n", burst ? "burst" : "polling"); - return 0; -} - -__setup("ec_burst=", acpi_ec_set_polling_mode); --- 0.99.9.GIT