From a5f8dee2d367e69fd57f5ea107072bb72eb15327 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Wed, 7 Mar 2007 22:27:59 +0300 Subject: [PATCH 01/11] ACPI: EC: Don't use Global Lock if not asked to do so Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index a802962ff2b4..7828ac5e5e7f 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -827,7 +827,6 @@ acpi_fake_ecdt_callback(acpi_handle handle, status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->gpe); if (ACPI_FAILURE(status)) return status; - ec_ecdt->global_lock = TRUE; ec_ecdt->handle = handle; ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02lx, ports=0x%2lx, 0x%2lx", @@ -901,8 +900,6 @@ static int __init acpi_ec_get_real_ecdt(void) ec_ecdt->command_addr = ecdt_ptr->control.address; ec_ecdt->data_addr = ecdt_ptr->data.address; ec_ecdt->gpe = ecdt_ptr->gpe; - /* use the GL just to be safe */ - ec_ecdt->global_lock = TRUE; ec_ecdt->uid = ecdt_ptr->uid; status = acpi_get_handle(NULL, ecdt_ptr->id, &ec_ecdt->handle); From 33d20b6100d05a0b14883e7dc8ab41e4531fcf59 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Wed, 7 Mar 2007 22:28:00 +0300 Subject: [PATCH 02/11] ACPI: EC: Make EC to initialize first in ACPI Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/Makefile | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index 5956e9f64a8b..9623aac9f450 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -1,6 +1,6 @@ # # Makefile for the Linux ACPI interpreter -# +# export ACPI_CFLAGS @@ -32,16 +32,17 @@ obj-y += osl.o utils.o \ processor-objs += processor_core.o processor_throttling.o \ processor_idle.o processor_thermal.o ifdef CONFIG_CPU_FREQ -processor-objs += processor_perflib.o +processor-objs += processor_perflib.o endif obj-y += sleep/ obj-y += bus.o glue.o obj-y += scan.o +# Keep EC driver first. Initialization of others depend on it. +obj-$(CONFIG_ACPI_EC) += ec.o obj-$(CONFIG_ACPI_AC) += ac.o obj-$(CONFIG_ACPI_BATTERY) += battery.o obj-$(CONFIG_ACPI_BUTTON) += button.o -obj-$(CONFIG_ACPI_EC) += ec.o obj-$(CONFIG_ACPI_FAN) += fan.o obj-$(CONFIG_ACPI_DOCK) += dock.o obj-$(CONFIG_ACPI_BAY) += bay.o From 33c7a0738c5f753a7d94fd3b2ec7d84e79a141a8 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Wed, 7 Mar 2007 22:28:00 +0300 Subject: [PATCH 03/11] ACPI: EC: "Fake ECDT" workaround is not needed any longer. Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 81 ----------------------------------------------- 1 file changed, 81 deletions(-) diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 7828ac5e5e7f..5999abd9909d 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -805,74 +805,6 @@ static int acpi_ec_stop(struct acpi_device *device, int type) return 0; } -static acpi_status __init -acpi_fake_ecdt_callback(acpi_handle handle, - u32 Level, void *context, void **retval) -{ - acpi_status status; - - mutex_init(&ec_ecdt->lock); - atomic_set(&ec_ecdt->event_count, 1); - if (acpi_ec_mode == EC_INTR) { - init_waitqueue_head(&ec_ecdt->wait); - } - status = acpi_walk_resources(handle, METHOD_NAME__CRS, - acpi_ec_io_ports, ec_ecdt); - if (ACPI_FAILURE(status)) - return status; - - ec_ecdt->uid = -1; - acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid); - - status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec_ecdt->gpe); - if (ACPI_FAILURE(status)) - return status; - ec_ecdt->handle = handle; - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02lx, ports=0x%2lx, 0x%2lx", - ec_ecdt->gpe, ec_ecdt->command_addr, - ec_ecdt->data_addr)); - - 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; - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Try to make an fake ECDT")); - - ec_ecdt = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); - if (!ec_ecdt) { - ret = -ENOMEM; - goto error; - } - - 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; - ACPI_EXCEPTION((AE_INFO, status, "Can't make an fake ECDT")); - goto error; - } - return 0; - error: - return ret; -} - static int __init acpi_ec_get_real_ecdt(void) { acpi_status status; @@ -916,18 +848,12 @@ static int __init acpi_ec_get_real_ecdt(void) 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; @@ -1000,13 +926,6 @@ static void __exit acpi_ec_exit(void) } #endif /* 0 */ -static int __init acpi_fake_ecdt_setup(char *str) -{ - acpi_fake_ecdt_enabled = 1; - return 1; -} - -__setup("acpi_fake_ecdt", acpi_fake_ecdt_setup); static int __init acpi_ec_set_intr_mode(char *str) { int intr; From c45aac43fec2d6ca8d0be8408f94e8176c8110ef Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Wed, 7 Mar 2007 22:28:00 +0300 Subject: [PATCH 04/11] ACPI: EC: enable burst functionality in EC. Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 89 ++++++++++++++++++++--------------------------- 1 file changed, 37 insertions(+), 52 deletions(-) diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 5999abd9909d..e7ce6e449424 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -101,7 +101,6 @@ static struct acpi_ec { struct mutex lock; atomic_t query_pending; atomic_t event_count; - atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */ wait_queue_head_t wait; } *ec_ecdt; @@ -173,56 +172,6 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, unsigned count) return -ETIME; } -#ifdef ACPI_FUTURE_USAGE -/* - * Note: samsung nv5000 doesn't work with ec burst mode. - * http://bugzilla.kernel.org/show_bug.cgi?id=4980 - */ -int acpi_ec_enter_burst_mode(struct acpi_ec *ec) -{ - u8 tmp = 0; - u8 status = 0; - - status = acpi_ec_read_status(ec); - if (status != -EINVAL && !(status & ACPI_EC_FLAG_BURST)) { - status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); - if (status) - goto end; - acpi_ec_write_cmd(ec, ACPI_EC_BURST_ENABLE); - status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1); - tmp = acpi_ec_read_data(ec); - if (tmp != 0x90) { /* Burst ACK byte */ - return -EINVAL; - } - } - - atomic_set(&ec->leaving_burst, 0); - return 0; - end: - ACPI_EXCEPTION((AE_INFO, status, "EC wait, burst mode")); - return -1; -} - -int acpi_ec_leave_burst_mode(struct acpi_ec *ec) -{ - u8 status = 0; - - status = acpi_ec_read_status(ec); - if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)) { - status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); - if (status) - goto end; - acpi_ec_write_cmd(ec, ACPI_EC_BURST_DISABLE); - acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0); - } - atomic_set(&ec->leaving_burst, 1); - return 0; - end: - ACPI_EXCEPTION((AE_INFO, status, "EC leave burst mode")); - return -1; -} -#endif /* ACPI_FUTURE_USAGE */ - static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, const u8 * wdata, unsigned wdata_len, u8 * rdata, unsigned rdata_len) @@ -312,6 +261,21 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command, return status; } +/* + * Note: samsung nv5000 doesn't work with ec burst mode. + * http://bugzilla.kernel.org/show_bug.cgi?id=4980 + */ +int acpi_ec_burst_enable(struct acpi_ec *ec) +{ + u8 d; + return acpi_ec_transaction(ec, ACPI_EC_BURST_ENABLE, NULL, 0, &d, 1); +} + +int acpi_ec_burst_disable(struct acpi_ec *ec) +{ + return acpi_ec_transaction(ec, ACPI_EC_BURST_DISABLE, NULL, 0, NULL, 0); +} + static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data) { int result; @@ -333,6 +297,28 @@ static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data) /* * Externally callable EC access functions. For now, assume 1 EC only */ +int ec_burst_enable(void) +{ + struct acpi_ec *ec; + if (!first_ec) + return -ENODEV; + ec = acpi_driver_data(first_ec); + return acpi_ec_burst_enable(ec); +} + +EXPORT_SYMBOL(ec_burst_enable); + +int ec_burst_disable(void) +{ + struct acpi_ec *ec; + if (!first_ec) + return -ENODEV; + ec = acpi_driver_data(first_ec); + return acpi_ec_burst_disable(ec); +} + +EXPORT_SYMBOL(ec_burst_disable); + int ec_read(u8 addr, u8 * val) { struct acpi_ec *ec; @@ -639,7 +625,6 @@ static int acpi_ec_add(struct acpi_device *device) atomic_set(&ec->query_pending, 0); atomic_set(&ec->event_count, 1); if (acpi_ec_mode == EC_INTR) { - atomic_set(&ec->leaving_burst, 1); init_waitqueue_head(&ec->wait); } strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); From 3d02b90be2c7bc7ffbc5e502a135c13838d23ef4 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Wed, 7 Mar 2007 22:28:00 +0300 Subject: [PATCH 05/11] ACPI: EC: Remove casts to/from void* from ec.c Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index e7ce6e449424..19896311214f 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -406,7 +406,7 @@ static int acpi_ec_query(struct acpi_ec *ec, u8 * data) static void acpi_ec_gpe_query(void *ec_cxt) { - struct acpi_ec *ec = (struct acpi_ec *)ec_cxt; + struct acpi_ec *ec = ec_cxt; u8 value = 0; char object_name[8]; @@ -424,8 +424,9 @@ static u32 acpi_ec_gpe_handler(void *data) { acpi_status status = AE_OK; u8 value; - struct acpi_ec *ec = (struct acpi_ec *)data; + struct acpi_ec *ec = data; atomic_inc(&ec->event_count); + if (acpi_ec_mode == EC_INTR) { wake_up(&ec->wait); } @@ -468,7 +469,7 @@ acpi_ec_space_handler(u32 function, void *handler_context, void *region_context) { int result = 0; - struct acpi_ec *ec = NULL; + struct acpi_ec *ec = handler_context; u64 temp = *value; acpi_integer f_v = 0; int i = 0; @@ -480,8 +481,6 @@ acpi_ec_space_handler(u32 function, return AE_BAD_PARAMETER; } - ec = (struct acpi_ec *)handler_context; - next_byte: switch (function) { case ACPI_READ: @@ -537,7 +536,7 @@ static struct proc_dir_entry *acpi_ec_dir; static int acpi_ec_read_info(struct seq_file *seq, void *offset) { - struct acpi_ec *ec = (struct acpi_ec *)seq->private; + struct acpi_ec *ec = seq->private; if (!ec) goto end; @@ -694,7 +693,7 @@ static int acpi_ec_remove(struct acpi_device *device, int type) static acpi_status acpi_ec_io_ports(struct acpi_resource *resource, void *context) { - struct acpi_ec *ec = (struct acpi_ec *)context; + struct acpi_ec *ec = context; if (resource->type != ACPI_RESOURCE_TYPE_IO) { return AE_OK; From e8284321048aac7be307b3ec5e0631f5c514935a Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Wed, 7 Mar 2007 22:28:00 +0300 Subject: [PATCH 06/11] ACPI: EC: Put install handlers into separate function. Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 87 +++++++++++++++-------------------------------- 1 file changed, 27 insertions(+), 60 deletions(-) diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 19896311214f..399cedf2cfa6 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -715,6 +715,28 @@ acpi_ec_io_ports(struct acpi_resource *resource, void *context) return AE_OK; } +static int ec_install_handlers(struct acpi_ec *ec) +{ + acpi_status status = acpi_install_gpe_handler(NULL, ec->gpe, + ACPI_GPE_EDGE_TRIGGERED, + &acpi_ec_gpe_handler, ec); + if (ACPI_FAILURE(status)) + return -ENODEV; + acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); + acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); + + status = acpi_install_address_space_handler(ec->handle, + ACPI_ADR_SPACE_EC, + &acpi_ec_space_handler, + &acpi_ec_space_setup, ec); + if (ACPI_FAILURE(status)) { + acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler); + return -ENODEV; + } + + return 0; +} + static int acpi_ec_start(struct acpi_device *device) { acpi_status status = AE_OK; @@ -742,28 +764,7 @@ static int acpi_ec_start(struct acpi_device *device) ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02lx, ports=0x%2lx,0x%2lx", ec->gpe, ec->command_addr, ec->data_addr)); - /* - * Install GPE handler - */ - status = acpi_install_gpe_handler(NULL, ec->gpe, - ACPI_GPE_EDGE_TRIGGERED, - &acpi_ec_gpe_handler, ec); - if (ACPI_FAILURE(status)) { - return -ENODEV; - } - acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); - acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); - - status = acpi_install_address_space_handler(ec->handle, - ACPI_ADR_SPACE_EC, - &acpi_ec_space_handler, - &acpi_ec_space_setup, ec); - if (ACPI_FAILURE(status)) { - acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler); - return -ENODEV; - } - - return AE_OK; + return ec_install_handlers(ec); } static int acpi_ec_stop(struct acpi_device *device, int type) @@ -818,56 +819,22 @@ static int __init acpi_ec_get_real_ecdt(void) ec_ecdt->gpe = ecdt_ptr->gpe; ec_ecdt->uid = ecdt_ptr->uid; - status = acpi_get_handle(NULL, ecdt_ptr->id, &ec_ecdt->handle); - if (ACPI_FAILURE(status)) { - goto error; - } - + ec_ecdt->handle = ACPI_ROOT_OBJECT; return 0; - error: - ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT")); - kfree(ec_ecdt); - ec_ecdt = NULL; - - return -ENODEV; } int __init acpi_ec_ecdt_probe(void) { - acpi_status status; int ret; ret = acpi_ec_get_real_ecdt(); if (ret) return 0; - /* - * Install GPE handler - */ - status = acpi_install_gpe_handler(NULL, ec_ecdt->gpe, - ACPI_GPE_EDGE_TRIGGERED, - &acpi_ec_gpe_handler, ec_ecdt); - if (ACPI_FAILURE(status)) { - goto error; - } - acpi_set_gpe_type(NULL, ec_ecdt->gpe, ACPI_GPE_TYPE_RUNTIME); - acpi_enable_gpe(NULL, ec_ecdt->gpe, ACPI_NOT_ISR); + ret = ec_install_handlers(ec_ecdt); + if (!ret) + return 0; - 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->gpe, - &acpi_ec_gpe_handler); - goto error; - } - - return 0; - - error: - ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT")); kfree(ec_ecdt); ec_ecdt = NULL; From c0900c3512dc8fd0b37f8fbcebc7853ed9efff10 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Wed, 7 Mar 2007 22:28:00 +0300 Subject: [PATCH 07/11] ACPI: EC: Clean ECDT and namespace parsing. Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 213 ++++++++++++++++++++++++---------------------- 1 file changed, 113 insertions(+), 100 deletions(-) diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 399cedf2cfa6..c9dcf9a2a469 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -604,74 +604,73 @@ static int acpi_ec_remove_fs(struct acpi_device *device) /* -------------------------------------------------------------------------- Driver Interface -------------------------------------------------------------------------- */ +static acpi_status +ec_parse_io_ports(struct acpi_resource *resource, void *context); + +static acpi_status +ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval); + +static struct acpi_ec *make_acpi_ec(void) +{ + struct acpi_ec *ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); + if (!ec) + return NULL; + + atomic_set(&ec->query_pending, 0); + atomic_set(&ec->event_count, 1); + mutex_init(&ec->lock); + init_waitqueue_head(&ec->wait); + + return ec; +} static int acpi_ec_add(struct acpi_device *device) { - int result = 0; acpi_status status = AE_OK; struct acpi_ec *ec = NULL; if (!device) return -EINVAL; - ec = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); + strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); + strcpy(acpi_device_class(device), ACPI_EC_CLASS); + + ec = make_acpi_ec(); if (!ec) return -ENOMEM; - ec->handle = device->handle; - ec->uid = -1; - mutex_init(&ec->lock); - atomic_set(&ec->query_pending, 0); - atomic_set(&ec->event_count, 1); - if (acpi_ec_mode == EC_INTR) { - init_waitqueue_head(&ec->wait); + status = ec_parse_device(device->handle, 0, ec, NULL); + if (status != AE_CTRL_TERMINATE) { + kfree(ec); + return -EINVAL; } - strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); - strcpy(acpi_device_class(device), ACPI_EC_CLASS); + + /* Check if we found the boot EC */ + if (ec_ecdt) { + if (ec_ecdt->gpe == ec->gpe) { + /* We might have incorrect info for GL at boot time */ + mutex_lock(&ec_ecdt->lock); + ec_ecdt->global_lock = ec->global_lock; + mutex_unlock(&ec_ecdt->lock); + kfree(ec); + ec = ec_ecdt; + } + } + + ec->handle = device->handle; + acpi_driver_data(device) = ec; - /* Use the global lock for all EC transactions? */ - acpi_evaluate_integer(ec->handle, "_GLK", NULL, &ec->global_lock); + if (!first_ec) + first_ec = device; - /* XXX we don't test uids, because on some boxes ecdt uid = 0, see: - http://bugzilla.kernel.org/show_bug.cgi?id=6111 */ - if (ec_ecdt) { - acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, - ACPI_ADR_SPACE_EC, - &acpi_ec_space_handler); - - acpi_remove_gpe_handler(NULL, ec_ecdt->gpe, - &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->handle, "_GPE", NULL, &ec->gpe); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, - "Obtaining GPE bit assignment")); - result = -ENODEV; - goto end; - } - - result = acpi_ec_add_fs(device); - if (result) - goto end; + acpi_ec_add_fs(device); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s [%s] (gpe %d) interrupt mode.", acpi_device_name(device), acpi_device_bid(device), (u32) ec->gpe)); - if (!first_ec) - first_ec = device; - - end: - if (result) - kfree(ec); - - return result; + return 0; } static int acpi_ec_remove(struct acpi_device *device, int type) @@ -685,13 +684,19 @@ static int acpi_ec_remove(struct acpi_device *device, int type) acpi_ec_remove_fs(device); - kfree(ec); + acpi_driver_data(device) = NULL; + if (device == first_ec) + first_ec = NULL; + + /* Don't touch boot EC */ + if (ec_ecdt != ec) + kfree(ec); return 0; } static acpi_status -acpi_ec_io_ports(struct acpi_resource *resource, void *context) +ec_parse_io_ports(struct acpi_resource *resource, void *context) { struct acpi_ec *ec = context; @@ -717,9 +722,10 @@ acpi_ec_io_ports(struct acpi_resource *resource, void *context) static int ec_install_handlers(struct acpi_ec *ec) { - acpi_status status = acpi_install_gpe_handler(NULL, ec->gpe, - ACPI_GPE_EDGE_TRIGGERED, - &acpi_ec_gpe_handler, ec); + acpi_status status; + status = acpi_install_gpe_handler(NULL, ec->gpe, + ACPI_GPE_EDGE_TRIGGERED, + &acpi_ec_gpe_handler, ec); if (ACPI_FAILURE(status)) return -ENODEV; acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); @@ -739,8 +745,7 @@ static int ec_install_handlers(struct acpi_ec *ec) static int acpi_ec_start(struct acpi_device *device) { - acpi_status status = AE_OK; - struct acpi_ec *ec = NULL; + struct acpi_ec *ec; if (!device) return -EINVAL; @@ -750,32 +755,31 @@ static int acpi_ec_start(struct acpi_device *device) if (!ec) return -EINVAL; - /* - * Get I/O port addresses. Convert to GAS format. - */ - status = acpi_walk_resources(ec->handle, METHOD_NAME__CRS, - acpi_ec_io_ports, ec); - if (ACPI_FAILURE(status) || ec->command_addr == 0) { - ACPI_EXCEPTION((AE_INFO, status, - "Error getting I/O port addresses")); - return -ENODEV; - } - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02lx, ports=0x%2lx,0x%2lx", ec->gpe, ec->command_addr, ec->data_addr)); + /* Boot EC is already working */ + if (ec == ec_ecdt) + return 0; + return ec_install_handlers(ec); } static int acpi_ec_stop(struct acpi_device *device, int type) { - acpi_status status = AE_OK; - struct acpi_ec *ec = NULL; + acpi_status status; + struct acpi_ec *ec; if (!device) return -EINVAL; ec = acpi_driver_data(device); + if (!ec) + return -EINVAL; + + /* Don't touch boot EC */ + if (ec == ec_ecdt) + return 0; status = acpi_remove_address_space_handler(ec->handle, ACPI_ADR_SPACE_EC, @@ -790,51 +794,64 @@ static int acpi_ec_stop(struct acpi_device *device, int type) return 0; } -static int __init acpi_ec_get_real_ecdt(void) +static acpi_status +ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval) { acpi_status status; - struct acpi_table_ecdt *ecdt_ptr; - status = acpi_get_table(ACPI_SIG_ECDT, 1, - (struct acpi_table_header **)&ecdt_ptr); + struct acpi_ec *ec = context; + status = acpi_walk_resources(handle, METHOD_NAME__CRS, + ec_parse_io_ports, ec); if (ACPI_FAILURE(status)) - return -ENODEV; + return status; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found ECDT")); + /* Get GPE bit assignment (EC events). */ + /* TODO: Add support for _GPE returning a package */ + status = acpi_evaluate_integer(handle, "_GPE", NULL, &ec->gpe); + if (ACPI_FAILURE(status)) + return status; - /* - * Generate a temporary ec context to use until the namespace is scanned - */ - ec_ecdt = kzalloc(sizeof(struct acpi_ec), GFP_KERNEL); - if (!ec_ecdt) - return -ENOMEM; + /* Use the global lock for all EC transactions? */ + acpi_evaluate_integer(handle, "_GLK", NULL, &ec->global_lock); - mutex_init(&ec_ecdt->lock); - atomic_set(&ec_ecdt->event_count, 1); - if (acpi_ec_mode == EC_INTR) { - init_waitqueue_head(&ec_ecdt->wait); - } - ec_ecdt->command_addr = ecdt_ptr->control.address; - ec_ecdt->data_addr = ecdt_ptr->data.address; - ec_ecdt->gpe = ecdt_ptr->gpe; - ec_ecdt->uid = ecdt_ptr->uid; + ec->handle = handle; - ec_ecdt->handle = ACPI_ROOT_OBJECT; - return 0; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02lx, ports=0x%2lx, 0x%2lx", + ec->gpe, ec->command_addr, ec->data_addr)); + + return AE_CTRL_TERMINATE; } int __init acpi_ec_ecdt_probe(void) { int ret; + acpi_status status; + struct acpi_table_ecdt *ecdt_ptr; - ret = acpi_ec_get_real_ecdt(); - if (ret) - return 0; + ec_ecdt = make_acpi_ec(); + if (!ec_ecdt) + return -ENOMEM; + /* + * Generate a boot ec context + */ + + status = acpi_get_table(ACPI_SIG_ECDT, 1, + (struct acpi_table_header **)&ecdt_ptr); + if (ACPI_FAILURE(status)) + goto error; + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found ECDT")); + + ec_ecdt->command_addr = ecdt_ptr->control.address; + ec_ecdt->data_addr = ecdt_ptr->data.address; + ec_ecdt->gpe = ecdt_ptr->gpe; + ec_ecdt->uid = ecdt_ptr->uid; + ec_ecdt->handle = ACPI_ROOT_OBJECT; ret = ec_install_handlers(ec_ecdt); if (!ret) return 0; - + error: kfree(ec_ecdt); ec_ecdt = NULL; @@ -884,12 +901,8 @@ static int __init acpi_ec_set_intr_mode(char *str) if (!get_option(&str, &intr)) return 0; - if (intr) { - acpi_ec_mode = EC_INTR; - } else { - acpi_ec_mode = EC_POLL; - } - acpi_ec_driver.ops.add = acpi_ec_add; + acpi_ec_mode = (intr) ? EC_INTR : EC_POLL; + printk(KERN_NOTICE PREFIX "%s mode.\n", intr ? "interrupt" : "polling"); return 1; From d66d969df88c742494736ed06eeaf3229d3a7259 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Wed, 7 Mar 2007 22:28:00 +0300 Subject: [PATCH 08/11] ACPI: EC: Rename ec_ecdt to more informative boot_ec Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 43 ++++++++++++++++++++----------------------- 1 file changed, 20 insertions(+), 23 deletions(-) diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index c9dcf9a2a469..125046884b8b 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -102,7 +102,7 @@ static struct acpi_ec { atomic_t query_pending; atomic_t event_count; wait_queue_head_t wait; -} *ec_ecdt; +} *boot_ec; /* External interfaces use first EC only, so remember */ static struct acpi_device *first_ec; @@ -646,21 +646,18 @@ static int acpi_ec_add(struct acpi_device *device) } /* Check if we found the boot EC */ - if (ec_ecdt) { - if (ec_ecdt->gpe == ec->gpe) { + if (boot_ec) { + if (boot_ec->gpe == ec->gpe) { /* We might have incorrect info for GL at boot time */ - mutex_lock(&ec_ecdt->lock); - ec_ecdt->global_lock = ec->global_lock; - mutex_unlock(&ec_ecdt->lock); + mutex_lock(&boot_ec->lock); + boot_ec->global_lock = ec->global_lock; + mutex_unlock(&boot_ec->lock); kfree(ec); - ec = ec_ecdt; + ec = boot_ec; } } - ec->handle = device->handle; - acpi_driver_data(device) = ec; - if (!first_ec) first_ec = device; @@ -689,7 +686,7 @@ static int acpi_ec_remove(struct acpi_device *device, int type) first_ec = NULL; /* Don't touch boot EC */ - if (ec_ecdt != ec) + if (boot_ec != ec) kfree(ec); return 0; @@ -759,7 +756,7 @@ static int acpi_ec_start(struct acpi_device *device) ec->gpe, ec->command_addr, ec->data_addr)); /* Boot EC is already working */ - if (ec == ec_ecdt) + if (ec == boot_ec) return 0; return ec_install_handlers(ec); @@ -778,7 +775,7 @@ static int acpi_ec_stop(struct acpi_device *device, int type) return -EINVAL; /* Don't touch boot EC */ - if (ec == ec_ecdt) + if (ec == boot_ec) return 0; status = acpi_remove_address_space_handler(ec->handle, @@ -828,8 +825,8 @@ int __init acpi_ec_ecdt_probe(void) acpi_status status; struct acpi_table_ecdt *ecdt_ptr; - ec_ecdt = make_acpi_ec(); - if (!ec_ecdt) + boot_ec = make_acpi_ec(); + if (!boot_ec) return -ENOMEM; /* * Generate a boot ec context @@ -842,18 +839,18 @@ int __init acpi_ec_ecdt_probe(void) ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found ECDT")); - ec_ecdt->command_addr = ecdt_ptr->control.address; - ec_ecdt->data_addr = ecdt_ptr->data.address; - ec_ecdt->gpe = ecdt_ptr->gpe; - ec_ecdt->uid = ecdt_ptr->uid; - ec_ecdt->handle = ACPI_ROOT_OBJECT; + boot_ec->command_addr = ecdt_ptr->control.address; + boot_ec->data_addr = ecdt_ptr->data.address; + boot_ec->gpe = ecdt_ptr->gpe; + boot_ec->uid = ecdt_ptr->uid; + boot_ec->handle = ACPI_ROOT_OBJECT; - ret = ec_install_handlers(ec_ecdt); + ret = ec_install_handlers(boot_ec); if (!ret) return 0; error: - kfree(ec_ecdt); - ec_ecdt = NULL; + kfree(boot_ec); + boot_ec = NULL; return -ENODEV; } From d033879c9838b960014e861d0eb3bdf11d3b9d9d Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Wed, 7 Mar 2007 22:28:00 +0300 Subject: [PATCH 09/11] ACPI: EC: first_ec is better to be acpi_ec than acpi_device. Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 41 +++++++++++++---------------------------- 1 file changed, 13 insertions(+), 28 deletions(-) diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 125046884b8b..187981a3e881 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -91,6 +91,7 @@ static struct acpi_driver acpi_ec_driver = { }; /* If we find an EC via the ECDT, we need to keep a ptr to its context */ +/* External interfaces use first EC only, so remember */ static struct acpi_ec { acpi_handle handle; unsigned long uid; @@ -102,10 +103,7 @@ static struct acpi_ec { atomic_t query_pending; atomic_t event_count; wait_queue_head_t wait; -} *boot_ec; - -/* External interfaces use first EC only, so remember */ -static struct acpi_device *first_ec; +} *boot_ec, *first_ec; /* -------------------------------------------------------------------------- Transaction Management @@ -299,38 +297,31 @@ static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data) */ int ec_burst_enable(void) { - struct acpi_ec *ec; if (!first_ec) return -ENODEV; - ec = acpi_driver_data(first_ec); - return acpi_ec_burst_enable(ec); + return acpi_ec_burst_enable(first_ec); } EXPORT_SYMBOL(ec_burst_enable); int ec_burst_disable(void) { - struct acpi_ec *ec; if (!first_ec) return -ENODEV; - ec = acpi_driver_data(first_ec); - return acpi_ec_burst_disable(ec); + return acpi_ec_burst_disable(first_ec); } EXPORT_SYMBOL(ec_burst_disable); int ec_read(u8 addr, u8 * val) { - struct acpi_ec *ec; int err; u8 temp_data; if (!first_ec) return -ENODEV; - ec = acpi_driver_data(first_ec); - - err = acpi_ec_read(ec, addr, &temp_data); + err = acpi_ec_read(first_ec, addr, &temp_data); if (!err) { *val = temp_data; @@ -343,15 +334,12 @@ EXPORT_SYMBOL(ec_read); int ec_write(u8 addr, u8 val) { - struct acpi_ec *ec; int err; if (!first_ec) return -ENODEV; - ec = acpi_driver_data(first_ec); - - err = acpi_ec_write(ec, addr, val); + err = acpi_ec_write(first_ec, addr, val); return err; } @@ -362,14 +350,10 @@ int ec_transaction(u8 command, const u8 * wdata, unsigned wdata_len, u8 * rdata, unsigned rdata_len) { - struct acpi_ec *ec; - if (!first_ec) return -ENODEV; - ec = acpi_driver_data(first_ec); - - return acpi_ec_transaction(ec, command, wdata, + return acpi_ec_transaction(first_ec, command, wdata, wdata_len, rdata, rdata_len); } @@ -655,11 +639,10 @@ static int acpi_ec_add(struct acpi_device *device) kfree(ec); ec = boot_ec; } - } + } else + first_ec = ec; ec->handle = device->handle; acpi_driver_data(device) = ec; - if (!first_ec) - first_ec = device; acpi_ec_add_fs(device); @@ -682,7 +665,7 @@ static int acpi_ec_remove(struct acpi_device *device, int type) acpi_ec_remove_fs(device); acpi_driver_data(device) = NULL; - if (device == first_ec) + if (ec == first_ec) first_ec = NULL; /* Don't touch boot EC */ @@ -846,8 +829,10 @@ int __init acpi_ec_ecdt_probe(void) boot_ec->handle = ACPI_ROOT_OBJECT; ret = ec_install_handlers(boot_ec); - if (!ret) + if (!ret) { + first_ec = boot_ec; return 0; + } error: kfree(boot_ec); boot_ec = NULL; From 01f2246269639f6aa93086719a8dbec26cb68e98 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Wed, 7 Mar 2007 22:28:00 +0300 Subject: [PATCH 10/11] ACPI: EC: Cleanup of EC initialization Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 32 +++++++++++++------------------- 1 file changed, 13 insertions(+), 19 deletions(-) diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 187981a3e881..2a172299b24c 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -1,6 +1,8 @@ /* - * acpi_ec.c - ACPI Embedded Controller Driver ($Revision: 38 $) + * ec.c - ACPI Embedded Controller Driver (v2.0) * + * Copyright (C) 2006, 2007 Alexey Starikovskiy + * Copyright (C) 2006 Denis Sadykov * Copyright (C) 2004 Luming Yu * Copyright (C) 2001, 2002 Andy Grover * Copyright (C) 2001, 2002 Paul Diefenbaugh @@ -94,7 +96,6 @@ static struct acpi_driver acpi_ec_driver = { /* External interfaces use first EC only, so remember */ static struct acpi_ec { acpi_handle handle; - unsigned long uid; unsigned long gpe; unsigned long command_addr; unsigned long data_addr; @@ -525,13 +526,11 @@ static int acpi_ec_read_info(struct seq_file *seq, void *offset) if (!ec) goto end; - seq_printf(seq, "gpe: 0x%02x\n", (u32) ec->gpe); - seq_printf(seq, "ports: 0x%02x, 0x%02x\n", - (u32) ec->command_addr, (u32) ec->data_addr); - seq_printf(seq, "use global lock: %s\n", + seq_printf(seq, "gpe:\t\t\t0x%02x\n", (u32) ec->gpe); + seq_printf(seq, "ports:\t\t\t0x%02x, 0x%02x\n", + (unsigned)ec->command_addr, (unsigned)ec->data_addr); + seq_printf(seq, "use global lock:\t%s\n", ec->global_lock ? "yes" : "no"); - acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); - end: return 0; } @@ -655,15 +654,13 @@ static int acpi_ec_add(struct acpi_device *device) static int acpi_ec_remove(struct acpi_device *device, int type) { - struct acpi_ec *ec = NULL; + struct acpi_ec *ec; if (!device) return -EINVAL; ec = acpi_driver_data(device); - acpi_ec_remove_fs(device); - acpi_driver_data(device) = NULL; if (ec == first_ec) first_ec = NULL; @@ -671,7 +668,6 @@ static int acpi_ec_remove(struct acpi_device *device, int type) /* Don't touch boot EC */ if (boot_ec != ec) kfree(ec); - return 0; } @@ -680,22 +676,20 @@ ec_parse_io_ports(struct acpi_resource *resource, void *context) { struct acpi_ec *ec = context; - if (resource->type != ACPI_RESOURCE_TYPE_IO) { + if (resource->type != ACPI_RESOURCE_TYPE_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->data_addr == 0) { + if (ec->data_addr == 0) ec->data_addr = resource->data.io.minimum; - } else if (ec->command_addr == 0) { + else if (ec->command_addr == 0) ec->command_addr = resource->data.io.minimum; - } else { + else return AE_CTRL_TERMINATE; - } return AE_OK; } @@ -708,6 +702,7 @@ static int ec_install_handlers(struct acpi_ec *ec) &acpi_ec_gpe_handler, ec); if (ACPI_FAILURE(status)) return -ENODEV; + acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); @@ -825,7 +820,6 @@ int __init acpi_ec_ecdt_probe(void) boot_ec->command_addr = ecdt_ptr->control.address; boot_ec->data_addr = ecdt_ptr->data.address; boot_ec->gpe = ecdt_ptr->gpe; - boot_ec->uid = ecdt_ptr->uid; boot_ec->handle = ACPI_ROOT_OBJECT; ret = ec_install_handlers(boot_ec); From 9fd9f8e8bdcfc9aa309dae5bccc55d02804337d0 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Wed, 7 Mar 2007 22:28:00 +0300 Subject: [PATCH 11/11] ACPI: EC: Block queries until EC is fully initialized Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/ec.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 2a172299b24c..e08cf98f504f 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -599,7 +599,7 @@ static struct acpi_ec *make_acpi_ec(void) if (!ec) return NULL; - atomic_set(&ec->query_pending, 0); + atomic_set(&ec->query_pending, 1); atomic_set(&ec->event_count, 1); mutex_init(&ec->lock); init_waitqueue_head(&ec->wait); @@ -715,6 +715,9 @@ static int ec_install_handlers(struct acpi_ec *ec) return -ENODEV; } + /* EC is fully operational, allow queries */ + atomic_set(&ec->query_pending, 0); + return 0; }