X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Facpi%2Fec.c;h=1ac28c6a672ea3667331772f5535515d8b129e9d;hb=ec28dcc6b4c00b78ad269ad5b85ebd5c2d504825;hp=cebd65d2e2a9be262273576749ec77c93dce108d;hpb=dd15f8c42af09031e27da5b4d697ce925511f2e1;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index cebd65d..1ac28c6 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -42,13 +42,12 @@ #include #include #include -#include +#include #define ACPI_EC_CLASS "embedded_controller" #define ACPI_EC_DEVICE_NAME "Embedded Controller" #define ACPI_EC_FILE_INFO "info" -#undef PREFIX #define PREFIX "ACPI: EC: " /* EC status register */ @@ -68,19 +67,18 @@ enum ec_command { #define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */ #define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ -#define ACPI_EC_UDELAY 100 /* Wait 100us before polling EC again */ +#define ACPI_EC_CDELAY 10 /* Wait 10us before polling EC */ +#define ACPI_EC_MSI_UDELAY 550 /* Wait 550us for MSI EC */ -#define ACPI_EC_STORM_THRESHOLD 20 /* number of false interrupts +#define ACPI_EC_STORM_THRESHOLD 8 /* number of false interrupts per one transaction */ enum { EC_FLAGS_QUERY_PENDING, /* Query is pending */ - EC_FLAGS_GPE_MODE, /* Expect GPE to be sent - * for status change */ - EC_FLAGS_NO_GPE, /* Don't use GPE mode */ EC_FLAGS_GPE_STORM, /* GPE storm detected */ - EC_FLAGS_HANDLERS_INSTALLED /* Handlers for GPE and + EC_FLAGS_HANDLERS_INSTALLED, /* Handlers for GPE and * OpReg are installed */ + EC_FLAGS_FROZEN, /* Transactions are suspended */ }; /* If we find an EC via the ECDT, we need to keep a ptr to its context */ @@ -100,6 +98,8 @@ struct transaction { u8 *rdata; unsigned short irq_count; u8 command; + u8 wi; + u8 ri; u8 wlen; u8 rlen; bool done; @@ -119,30 +119,9 @@ static struct acpi_ec { spinlock_t curr_lock; } *boot_ec, *first_ec; -/* - * Some Asus system have exchanged ECDT data/command IO addresses. - */ -static int print_ecdt_error(const struct dmi_system_id *id) -{ - printk(KERN_NOTICE PREFIX "%s detected - " - "ECDT has exchanged control/data I/O address\n", - id->ident); - return 0; -} - -static struct dmi_system_id __cpuinitdata ec_dmi_table[] = { - { - print_ecdt_error, "Asus L4R", { - DMI_MATCH(DMI_BIOS_VERSION, "1008.006"), - DMI_MATCH(DMI_PRODUCT_NAME, "L4R"), - DMI_MATCH(DMI_BOARD_NAME, "L4R") }, NULL}, - { - print_ecdt_error, "Asus M6R", { - DMI_MATCH(DMI_BIOS_VERSION, "0207"), - DMI_MATCH(DMI_PRODUCT_NAME, "M6R"), - DMI_MATCH(DMI_BOARD_NAME, "M6R") }, NULL}, - {}, -}; +static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */ +static int EC_FLAGS_VALIDATE_ECDT; /* ASUStec ECDTs need to be validated */ +static int EC_FLAGS_SKIP_DSDT_SCAN; /* Not all BIOS survive early DSDT scan */ /* -------------------------------------------------------------------------- Transaction Management @@ -185,116 +164,105 @@ static int ec_transaction_done(struct acpi_ec *ec) return ret; } -static void gpe_transaction(struct acpi_ec *ec, u8 status) +static void start_transaction(struct acpi_ec *ec) +{ + ec->curr->irq_count = ec->curr->wi = ec->curr->ri = 0; + ec->curr->done = false; + acpi_ec_write_cmd(ec, ec->curr->command); +} + +static void advance_transaction(struct acpi_ec *ec, u8 status) { unsigned long flags; spin_lock_irqsave(&ec->curr_lock, flags); if (!ec->curr) goto unlock; - if (ec->curr->wlen > 0) { - if ((status & ACPI_EC_FLAG_IBF) == 0) { - acpi_ec_write_data(ec, *(ec->curr->wdata++)); - --ec->curr->wlen; - } else + if (ec->curr->wlen > ec->curr->wi) { + if ((status & ACPI_EC_FLAG_IBF) == 0) + acpi_ec_write_data(ec, + ec->curr->wdata[ec->curr->wi++]); + else goto err; - } else if (ec->curr->rlen > 0) { + } else if (ec->curr->rlen > ec->curr->ri) { if ((status & ACPI_EC_FLAG_OBF) == 1) { - *(ec->curr->rdata++) = acpi_ec_read_data(ec); - if (--ec->curr->rlen == 0) + ec->curr->rdata[ec->curr->ri++] = acpi_ec_read_data(ec); + if (ec->curr->rlen == ec->curr->ri) ec->curr->done = true; } else goto err; - } else if (ec->curr->wlen == 0 && (status & ACPI_EC_FLAG_IBF) == 0) + } else if (ec->curr->wlen == ec->curr->wi && + (status & ACPI_EC_FLAG_IBF) == 0) ec->curr->done = true; goto unlock; err: /* false interrupt, state didn't change */ - ++ec->curr->irq_count; + if (in_interrupt()) + ++ec->curr->irq_count; unlock: spin_unlock_irqrestore(&ec->curr_lock, flags); } -static int acpi_ec_wait(struct acpi_ec *ec) -{ - if (wait_event_timeout(ec->wait, ec_transaction_done(ec), - msecs_to_jiffies(ACPI_EC_DELAY))) - return 0; - /* missing GPEs, switch back to poll mode */ - if (printk_ratelimit()) - pr_info(PREFIX "missing confirmations, " - "switch off interrupt mode.\n"); - set_bit(EC_FLAGS_NO_GPE, &ec->flags); - clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); - return 1; -} - -static void acpi_ec_gpe_query(void *ec_cxt); +static int acpi_ec_sync_query(struct acpi_ec *ec); -static int ec_check_sci(struct acpi_ec *ec, u8 state) +static int ec_check_sci_sync(struct acpi_ec *ec, u8 state) { if (state & ACPI_EC_FLAG_SCI) { if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) - return acpi_os_execute(OSL_EC_BURST_HANDLER, - acpi_ec_gpe_query, ec); + return acpi_ec_sync_query(ec); } return 0; } static int ec_poll(struct acpi_ec *ec) { - unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); - udelay(ACPI_EC_UDELAY); - while (time_before(jiffies, delay)) { - gpe_transaction(ec, acpi_ec_read_status(ec)); - udelay(ACPI_EC_UDELAY); - if (ec_transaction_done(ec)) - return 0; + unsigned long flags; + int repeat = 2; /* number of command restarts */ + while (repeat--) { + unsigned long delay = jiffies + + msecs_to_jiffies(ACPI_EC_DELAY); + do { + /* don't sleep with disabled interrupts */ + if (EC_FLAGS_MSI || irqs_disabled()) { + udelay(ACPI_EC_MSI_UDELAY); + if (ec_transaction_done(ec)) + return 0; + } else { + if (wait_event_timeout(ec->wait, + ec_transaction_done(ec), + msecs_to_jiffies(1))) + return 0; + } + advance_transaction(ec, acpi_ec_read_status(ec)); + } while (time_before(jiffies, delay)); + if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) + break; + pr_debug(PREFIX "controller reset, restart transaction\n"); + spin_lock_irqsave(&ec->curr_lock, flags); + start_transaction(ec); + spin_unlock_irqrestore(&ec->curr_lock, flags); } return -ETIME; } static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, - struct transaction *t, - int force_poll) + struct transaction *t) { unsigned long tmp; int ret = 0; - pr_debug(PREFIX "transaction start\n"); - /* disable GPE during transaction if storm is detected */ - if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { - clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); - acpi_disable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); - } + if (EC_FLAGS_MSI) + udelay(ACPI_EC_MSI_UDELAY); /* start transaction */ spin_lock_irqsave(&ec->curr_lock, tmp); /* following two actions should be kept atomic */ - t->irq_count = 0; - t->done = false; ec->curr = t; - acpi_ec_write_cmd(ec, ec->curr->command); + start_transaction(ec); if (ec->curr->command == ACPI_EC_COMMAND_QUERY) clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); spin_unlock_irqrestore(&ec->curr_lock, tmp); - /* if we selected poll mode or failed in GPE-mode do a poll loop */ - if (force_poll || - !test_bit(EC_FLAGS_GPE_MODE, &ec->flags) || - acpi_ec_wait(ec)) - ret = ec_poll(ec); - pr_debug(PREFIX "transaction end\n"); + ret = ec_poll(ec); spin_lock_irqsave(&ec->curr_lock, tmp); ec->curr = NULL; spin_unlock_irqrestore(&ec->curr_lock, tmp); - if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { - /* check if we received SCI during transaction */ - ec_check_sci(ec, acpi_ec_read_status(ec)); - /* it is safe to enable GPE outside of transaction */ - acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); - } else if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags) && - t->irq_count > ACPI_EC_STORM_THRESHOLD) { - pr_info(PREFIX "GPE storm detected, " - "transactions will use polling mode\n"); - set_bit(EC_FLAGS_GPE_STORM, &ec->flags); - } return ret; } @@ -308,16 +276,14 @@ static int ec_wait_ibf0(struct acpi_ec *ec) { unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY); /* interrupt wait manually if GPE mode is not active */ - unsigned long timeout = test_bit(EC_FLAGS_GPE_MODE, &ec->flags) ? - msecs_to_jiffies(ACPI_EC_DELAY) : msecs_to_jiffies(1); while (time_before(jiffies, delay)) - if (wait_event_timeout(ec->wait, ec_check_ibf0(ec), timeout)) + if (wait_event_timeout(ec->wait, ec_check_ibf0(ec), + msecs_to_jiffies(1))) return 0; return -ETIME; } -static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t, - int force_poll) +static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t) { int status; u32 glk; @@ -326,6 +292,10 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t, if (t->rdata) memset(t->rdata, 0, t->rlen); mutex_lock(&ec->lock); + if (test_bit(EC_FLAGS_FROZEN, &ec->flags)) { + status = -EINVAL; + goto unlock; + } if (ec->global_lock) { status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk); if (ACPI_FAILURE(status)) { @@ -339,7 +309,34 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t, status = -ETIME; goto end; } - status = acpi_ec_transaction_unlocked(ec, t, force_poll); + pr_debug(PREFIX "transaction start\n"); + /* disable GPE during transaction if storm is detected */ + if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { + /* + * It has to be disabled at the hardware level regardless of the + * GPE reference counting, so that it doesn't trigger. + */ + acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE); + } + + status = acpi_ec_transaction_unlocked(ec, t); + + /* check if we received SCI during transaction */ + ec_check_sci_sync(ec, acpi_ec_read_status(ec)); + if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { + msleep(1); + /* + * It is safe to enable the GPE outside of the transaction. Use + * acpi_set_gpe() for that, since we used it to disable the GPE + * above. + */ + acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE); + } else if (t->irq_count > ACPI_EC_STORM_THRESHOLD) { + pr_info(PREFIX "GPE storm detected, " + "transactions will use polling mode\n"); + set_bit(EC_FLAGS_GPE_STORM, &ec->flags); + } + pr_debug(PREFIX "transaction end\n"); end: if (ec->global_lock) acpi_release_global_lock(glk); @@ -348,28 +345,24 @@ unlock: 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) +static int acpi_ec_burst_enable(struct acpi_ec *ec) { u8 d; struct transaction t = {.command = ACPI_EC_BURST_ENABLE, .wdata = NULL, .rdata = &d, .wlen = 0, .rlen = 1}; - return acpi_ec_transaction(ec, &t, 0); + return acpi_ec_transaction(ec, &t); } -int acpi_ec_burst_disable(struct acpi_ec *ec) +static int acpi_ec_burst_disable(struct acpi_ec *ec) { struct transaction t = {.command = ACPI_EC_BURST_DISABLE, .wdata = NULL, .rdata = NULL, .wlen = 0, .rlen = 0}; return (acpi_ec_read_status(ec) & ACPI_EC_FLAG_BURST) ? - acpi_ec_transaction(ec, &t, 0) : 0; + acpi_ec_transaction(ec, &t) : 0; } static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data) @@ -380,7 +373,7 @@ static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data) .wdata = &address, .rdata = &d, .wlen = 1, .rlen = 1}; - result = acpi_ec_transaction(ec, &t, 0); + result = acpi_ec_transaction(ec, &t); *data = d; return result; } @@ -392,7 +385,7 @@ static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data) .wdata = wdata, .rdata = NULL, .wlen = 2, .rlen = 0}; - return acpi_ec_transaction(ec, &t, 0); + return acpi_ec_transaction(ec, &t); } /* @@ -460,12 +453,38 @@ int ec_transaction(u8 command, if (!first_ec) return -ENODEV; - return acpi_ec_transaction(first_ec, &t, force_poll); + return acpi_ec_transaction(first_ec, &t); } EXPORT_SYMBOL(ec_transaction); -static int acpi_ec_query(struct acpi_ec *ec, u8 * data) +void acpi_ec_suspend_transactions(void) +{ + struct acpi_ec *ec = first_ec; + + if (!ec) + return; + + mutex_lock(&ec->lock); + /* Prevent transactions from being carried out */ + set_bit(EC_FLAGS_FROZEN, &ec->flags); + mutex_unlock(&ec->lock); +} + +void acpi_ec_resume_transactions(void) +{ + struct acpi_ec *ec = first_ec; + + if (!ec) + return; + + mutex_lock(&ec->lock); + /* Allow transactions to be carried out again */ + clear_bit(EC_FLAGS_FROZEN, &ec->flags); + mutex_unlock(&ec->lock); +} + +static int acpi_ec_query_unlocked(struct acpi_ec *ec, u8 * data) { int result; u8 d; @@ -474,20 +493,16 @@ static int acpi_ec_query(struct acpi_ec *ec, u8 * data) .wlen = 0, .rlen = 1}; if (!ec || !data) return -EINVAL; - /* * 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). */ - - result = acpi_ec_transaction(ec, &t, 0); + result = acpi_ec_transaction_unlocked(ec, &t); if (result) return result; - if (!d) return -ENODATA; - *data = d; return 0; } @@ -531,57 +546,78 @@ void acpi_ec_remove_query_handler(struct acpi_ec *ec, u8 query_bit) EXPORT_SYMBOL_GPL(acpi_ec_remove_query_handler); -static void acpi_ec_gpe_query(void *ec_cxt) +static void acpi_ec_run(void *cxt) { - struct acpi_ec *ec = ec_cxt; - u8 value = 0; - struct acpi_ec_query_handler *handler, copy; - - if (!ec || acpi_ec_query(ec, &value)) + struct acpi_ec_query_handler *handler = cxt; + if (!handler) return; - mutex_lock(&ec->lock); + pr_debug(PREFIX "start query execution\n"); + if (handler->func) + handler->func(handler->data); + else if (handler->handle) + acpi_evaluate_object(handler->handle, NULL, NULL, NULL); + pr_debug(PREFIX "stop query execution\n"); + kfree(handler); +} + +static int acpi_ec_sync_query(struct acpi_ec *ec) +{ + u8 value = 0; + int status; + struct acpi_ec_query_handler *handler, *copy; + if ((status = acpi_ec_query_unlocked(ec, &value))) + return status; list_for_each_entry(handler, &ec->list, node) { if (value == handler->query_bit) { /* have custom handler for this bit */ - memcpy(©, handler, sizeof(copy)); - mutex_unlock(&ec->lock); - if (copy.func) { - copy.func(copy.data); - } else if (copy.handle) { - acpi_evaluate_object(copy.handle, NULL, NULL, NULL); - } - return; + copy = kmalloc(sizeof(*handler), GFP_KERNEL); + if (!copy) + return -ENOMEM; + memcpy(copy, handler, sizeof(*copy)); + pr_debug(PREFIX "push query execution (0x%2x) on queue\n", value); + return acpi_os_execute((copy->func) ? + OSL_NOTIFY_HANDLER : OSL_GPE_HANDLER, + acpi_ec_run, copy); } } + return 0; +} + +static void acpi_ec_gpe_query(void *ec_cxt) +{ + struct acpi_ec *ec = ec_cxt; + if (!ec) + return; + mutex_lock(&ec->lock); + acpi_ec_sync_query(ec); mutex_unlock(&ec->lock); } +static void acpi_ec_gpe_query(void *ec_cxt); + +static int ec_check_sci(struct acpi_ec *ec, u8 state) +{ + if (state & ACPI_EC_FLAG_SCI) { + if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) { + pr_debug(PREFIX "push gpe query to the queue\n"); + return acpi_os_execute(OSL_NOTIFY_HANDLER, + acpi_ec_gpe_query, ec); + } + } + return 0; +} + static u32 acpi_ec_gpe_handler(void *data) { struct acpi_ec *ec = data; - u8 status; pr_debug(PREFIX "~~~> interrupt\n"); - status = acpi_ec_read_status(ec); - gpe_transaction(ec, status); - if (ec_transaction_done(ec) && (status & ACPI_EC_FLAG_IBF) == 0) + advance_transaction(ec, acpi_ec_read_status(ec)); + if (ec_transaction_done(ec) && + (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF) == 0) { wake_up(&ec->wait); - - ec_check_sci(ec, status); - if (!test_bit(EC_FLAGS_GPE_MODE, &ec->flags) && - !test_bit(EC_FLAGS_NO_GPE, &ec->flags)) { - /* this is non-query, must be confirmation */ - if (!test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { - if (printk_ratelimit()) - pr_info(PREFIX "non-query interrupt received," - " switching to interrupt mode\n"); - } else { - /* hush, STORM switches the mode every transaction */ - pr_debug(PREFIX "non-query interrupt received," - " switching to interrupt mode\n"); - } - set_bit(EC_FLAGS_GPE_MODE, &ec->flags); + ec_check_sci(ec, acpi_ec_read_status(ec)); } return ACPI_INTERRUPT_HANDLED; } @@ -592,7 +628,7 @@ static u32 acpi_ec_gpe_handler(void *data) static acpi_status acpi_ec_space_handler(u32 function, acpi_physical_address address, - u32 bits, acpi_integer *value, + u32 bits, u64 *value, void *handler_context, void *region_context) { struct acpi_ec *ec = handler_context; @@ -608,7 +644,8 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address, if (bits != 8 && acpi_strict) return AE_BAD_PARAMETER; - acpi_ec_burst_enable(ec); + if (EC_FLAGS_MSI) + acpi_ec_burst_enable(ec); if (function == ACPI_READ) { result = acpi_ec_read(ec, address, &temp); @@ -622,14 +659,15 @@ acpi_ec_space_handler(u32 function, acpi_physical_address address, ++address; if (function == ACPI_READ) { result = acpi_ec_read(ec, address, &temp); - (*value) |= ((acpi_integer)temp) << i; + (*value) |= ((u64)temp) << i; } else { temp = 0xff & ((*value) >> i); result = acpi_ec_write(ec, address, temp); } } - acpi_ec_burst_disable(ec); + if (EC_FLAGS_MSI) + acpi_ec_burst_disable(ec); switch (result) { case -EINVAL: @@ -673,7 +711,7 @@ 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 = { +static const struct file_operations acpi_ec_info_ops = { .open = acpi_ec_info_open_fs, .read = seq_read, .llseek = seq_lseek, @@ -735,10 +773,15 @@ static acpi_status acpi_ec_register_query_methods(acpi_handle handle, u32 level, void *context, void **return_value) { - struct acpi_namespace_node *node = handle; + char node_name[5]; + struct acpi_buffer buffer = { sizeof(node_name), node_name }; struct acpi_ec *ec = context; int value = 0; - if (sscanf(node->name.ascii, "_Q%x", &value) == 1) { + acpi_status status; + + status = acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); + + if (ACPI_SUCCESS(status) && sscanf(node_name, "_Q%x", &value) == 1) { acpi_ec_add_query_handler(ec, value, handle, NULL, NULL); } return AE_OK; @@ -748,9 +791,13 @@ static acpi_status ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval) { acpi_status status; - unsigned long long tmp; + unsigned long long tmp = 0; struct acpi_ec *ec = context; + + /* clear addr values, ec_parse_io_ports depend on it */ + ec->command_addr = ec->data_addr = 0; + status = acpi_walk_resources(handle, METHOD_NAME__CRS, ec_parse_io_ports, ec); if (ACPI_FAILURE(status)) @@ -763,14 +810,53 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval) return status; ec->gpe = tmp; /* Use the global lock for all EC transactions? */ + tmp = 0; acpi_evaluate_integer(handle, "_GLK", NULL, &tmp); ec->global_lock = tmp; ec->handle = handle; return AE_CTRL_TERMINATE; } +static int ec_install_handlers(struct acpi_ec *ec) +{ + acpi_status status; + if (test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags)) + return 0; + status = acpi_install_gpe_handler(NULL, ec->gpe, + ACPI_GPE_EDGE_TRIGGERED, + &acpi_ec_gpe_handler, ec); + if (ACPI_FAILURE(status)) + return -ENODEV; + + acpi_enable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); + status = acpi_install_address_space_handler(ec->handle, + ACPI_ADR_SPACE_EC, + &acpi_ec_space_handler, + NULL, ec); + if (ACPI_FAILURE(status)) { + if (status == AE_NOT_FOUND) { + /* + * Maybe OS fails in evaluating the _REG object. + * The AE_NOT_FOUND error will be ignored and OS + * continue to initialize EC. + */ + printk(KERN_ERR "Fail in evaluating the _REG object" + " of EC device. Broken bios is suspected.\n"); + } else { + acpi_remove_gpe_handler(NULL, ec->gpe, + &acpi_ec_gpe_handler); + acpi_disable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); + return -ENODEV; + } + } + + set_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags); + return 0; +} + static void ec_remove_handlers(struct acpi_ec *ec) { + acpi_disable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle, ACPI_ADR_SPACE_EC, &acpi_ec_space_handler))) pr_err(PREFIX "failed to remove space handler\n"); @@ -783,9 +869,8 @@ static void ec_remove_handlers(struct acpi_ec *ec) static int acpi_ec_add(struct acpi_device *device) { struct acpi_ec *ec = NULL; + int ret; - if (!device) - return -EINVAL; strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_EC_CLASS); @@ -799,18 +884,18 @@ static int acpi_ec_add(struct acpi_device *device) ec = make_acpi_ec(); if (!ec) return -ENOMEM; - if (ec_parse_device(device->handle, 0, ec, NULL) != - AE_CTRL_TERMINATE) { + } + if (ec_parse_device(device->handle, 0, ec, NULL) != + AE_CTRL_TERMINATE) { kfree(ec); return -EINVAL; - } } ec->handle = device->handle; /* Find and register all query methods */ acpi_walk_namespace(ACPI_TYPE_METHOD, ec->handle, 1, - acpi_ec_register_query_methods, ec, NULL); + acpi_ec_register_query_methods, NULL, ec, NULL); if (!first_ec) first_ec = ec; @@ -818,9 +903,12 @@ static int acpi_ec_add(struct acpi_device *device) acpi_ec_add_fs(device); pr_info(PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n", ec->gpe, ec->command_addr, ec->data_addr); - pr_info(PREFIX "driver started in %s mode\n", - (test_bit(EC_FLAGS_GPE_MODE, &ec->flags))?"interrupt":"poll"); - return 0; + + ret = ec_install_handlers(ec); + + /* EC is fully operational, allow queries */ + clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); + return ret; } static int acpi_ec_remove(struct acpi_device *device, int type) @@ -832,6 +920,7 @@ static int acpi_ec_remove(struct acpi_device *device, int type) return -EINVAL; ec = acpi_driver_data(device); + ec_remove_handlers(ec); mutex_lock(&ec->lock); list_for_each_entry_safe(handler, tmp, &ec->list, node) { list_del(&handler->node); @@ -869,95 +958,70 @@ ec_parse_io_ports(struct acpi_resource *resource, void *context) return AE_OK; } -static int ec_install_handlers(struct acpi_ec *ec) +int __init acpi_boot_ec_enable(void) { - acpi_status status; - if (test_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags)) + if (!boot_ec || test_bit(EC_FLAGS_HANDLERS_INSTALLED, &boot_ec->flags)) + return 0; + if (!ec_install_handlers(boot_ec)) { + first_ec = boot_ec; return 0; - 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, - NULL, ec); - if (ACPI_FAILURE(status)) { - if (status == AE_NOT_FOUND) { - /* - * Maybe OS fails in evaluating the _REG object. - * The AE_NOT_FOUND error will be ignored and OS - * continue to initialize EC. - */ - printk(KERN_ERR "Fail in evaluating the _REG object" - " of EC device. Broken bios is suspected.\n"); - } else { - acpi_remove_gpe_handler(NULL, ec->gpe, - &acpi_ec_gpe_handler); - return -ENODEV; - } } - - set_bit(EC_FLAGS_HANDLERS_INSTALLED, &ec->flags); - return 0; + return -EFAULT; } -static int acpi_ec_start(struct acpi_device *device) -{ - struct acpi_ec *ec; - int ret = 0; - - if (!device) - return -EINVAL; - - ec = acpi_driver_data(device); - - if (!ec) - return -EINVAL; - - ret = ec_install_handlers(ec); +static const struct acpi_device_id ec_device_ids[] = { + {"PNP0C09", 0}, + {"", 0}, +}; - /* EC is fully operational, allow queries */ - clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags); - return ret; +/* Some BIOS do not survive early DSDT scan, skip it */ +static int ec_skip_dsdt_scan(const struct dmi_system_id *id) +{ + EC_FLAGS_SKIP_DSDT_SCAN = 1; + return 0; } -static int acpi_ec_stop(struct acpi_device *device, int type) +/* ASUStek often supplies us with broken ECDT, validate it */ +static int ec_validate_ecdt(const struct dmi_system_id *id) { - struct acpi_ec *ec; - if (!device) - return -EINVAL; - ec = acpi_driver_data(device); - if (!ec) - return -EINVAL; - ec_remove_handlers(ec); - + EC_FLAGS_VALIDATE_ECDT = 1; return 0; } -int __init acpi_boot_ec_enable(void) +/* MSI EC needs special treatment, enable it */ +static int ec_flag_msi(const struct dmi_system_id *id) { - if (!boot_ec || test_bit(EC_FLAGS_HANDLERS_INSTALLED, &boot_ec->flags)) - return 0; - if (!ec_install_handlers(boot_ec)) { - first_ec = boot_ec; - return 0; - } - return -EFAULT; + printk(KERN_DEBUG PREFIX "Detected MSI hardware, enabling workarounds.\n"); + EC_FLAGS_MSI = 1; + EC_FLAGS_VALIDATE_ECDT = 1; + return 0; } -static const struct acpi_device_id ec_device_ids[] = { - {"PNP0C09", 0}, - {"", 0}, +static struct dmi_system_id __initdata ec_dmi_table[] = { + { + ec_skip_dsdt_scan, "Compal JFL92", { + DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), + DMI_MATCH(DMI_BOARD_NAME, "JFL92") }, NULL}, + { + ec_flag_msi, "MSI hardware", { + DMI_MATCH(DMI_BIOS_VENDOR, "Micro-Star")}, NULL}, + { + ec_flag_msi, "MSI hardware", { + DMI_MATCH(DMI_SYS_VENDOR, "Micro-Star")}, NULL}, + { + ec_flag_msi, "MSI hardware", { + DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-Star")}, NULL}, + { + ec_validate_ecdt, "ASUS hardware", { + DMI_MATCH(DMI_BIOS_VENDOR, "ASUS") }, NULL}, + {}, }; + int __init acpi_ec_ecdt_probe(void) { - int ret; acpi_status status; + struct acpi_ec *saved_ec = NULL; struct acpi_table_ecdt *ecdt_ptr; boot_ec = make_acpi_ec(); @@ -966,48 +1030,66 @@ int __init acpi_ec_ecdt_probe(void) /* * Generate a boot ec context */ + dmi_check_system(ec_dmi_table); status = acpi_get_table(ACPI_SIG_ECDT, 1, (struct acpi_table_header **)&ecdt_ptr); if (ACPI_SUCCESS(status)) { pr_info(PREFIX "EC description table is found, configuring boot EC\n"); boot_ec->command_addr = ecdt_ptr->control.address; boot_ec->data_addr = ecdt_ptr->data.address; - if (dmi_check_system(ec_dmi_table)) { - /* - * If the board falls into ec_dmi_table, it means - * that ECDT table gives the incorrect command/status - * & data I/O address. Just fix it. - */ - boot_ec->data_addr = ecdt_ptr->control.address; - boot_ec->command_addr = ecdt_ptr->data.address; - } boot_ec->gpe = ecdt_ptr->gpe; boot_ec->handle = ACPI_ROOT_OBJECT; acpi_get_handle(ACPI_ROOT_OBJECT, ecdt_ptr->id, &boot_ec->handle); + /* Don't trust ECDT, which comes from ASUSTek */ + if (!EC_FLAGS_VALIDATE_ECDT) + goto install; + saved_ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL); + if (!saved_ec) + return -ENOMEM; + memcpy(saved_ec, boot_ec, sizeof(struct acpi_ec)); + /* fall through */ + } + + if (EC_FLAGS_SKIP_DSDT_SCAN) + return -ENODEV; + + /* This workaround is needed only on some broken machines, + * which require early EC, but fail to provide ECDT */ + printk(KERN_DEBUG PREFIX "Look up EC in DSDT\n"); + status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device, + boot_ec, NULL); + /* Check that acpi_get_devices actually find something */ + if (ACPI_FAILURE(status) || !boot_ec->handle) + goto error; + if (saved_ec) { + /* try to find good ECDT from ASUSTek */ + if (saved_ec->command_addr != boot_ec->command_addr || + saved_ec->data_addr != boot_ec->data_addr || + saved_ec->gpe != boot_ec->gpe || + saved_ec->handle != boot_ec->handle) + pr_info(PREFIX "ASUSTek keeps feeding us with broken " + "ECDT tables, which are very hard to workaround. " + "Trying to use DSDT EC info instead. Please send " + "output of acpidump to linux-acpi@vger.kernel.org\n"); + kfree(saved_ec); + saved_ec = NULL; } else { - /* This workaround is needed only on some broken machines, - * which require early EC, but fail to provide ECDT */ - acpi_handle x; - printk(KERN_DEBUG PREFIX "Look up EC in DSDT\n"); - status = acpi_get_devices(ec_device_ids[0].id, ec_parse_device, - boot_ec, NULL); - /* Check that acpi_get_devices actually find something */ - if (ACPI_FAILURE(status) || !boot_ec->handle) - goto error; /* We really need to limit this workaround, the only ASUS, - * which needs it, has fake EC._INI method, so use it as flag. - * Keep boot_ec struct as it will be needed soon. - */ - if (ACPI_FAILURE(acpi_get_handle(boot_ec->handle, "_INI", &x))) + * which needs it, has fake EC._INI method, so use it as flag. + * Keep boot_ec struct as it will be needed soon. + */ + acpi_handle dummy; + if (!dmi_name_in_vendors("ASUS") || + ACPI_FAILURE(acpi_get_handle(boot_ec->handle, "_INI", + &dummy))) return -ENODEV; } - - ret = ec_install_handlers(boot_ec); - if (!ret) { +install: + if (!ec_install_handlers(boot_ec)) { first_ec = boot_ec; return 0; } - error: +error: kfree(boot_ec); boot_ec = NULL; return -ENODEV; @@ -1016,19 +1098,16 @@ int __init acpi_ec_ecdt_probe(void) static int acpi_ec_suspend(struct acpi_device *device, pm_message_t state) { struct acpi_ec *ec = acpi_driver_data(device); - /* Stop using GPE */ - set_bit(EC_FLAGS_NO_GPE, &ec->flags); - clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); - acpi_disable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); + /* Stop using the GPE, but keep it reference counted. */ + acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE); return 0; } static int acpi_ec_resume(struct acpi_device *device) { struct acpi_ec *ec = acpi_driver_data(device); - /* Enable use of GPE back */ - clear_bit(EC_FLAGS_NO_GPE, &ec->flags); - acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR); + /* Enable the GPE again, but don't reference count it once more. */ + acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE); return 0; } @@ -1039,20 +1118,15 @@ static struct acpi_driver acpi_ec_driver = { .ops = { .add = acpi_ec_add, .remove = acpi_ec_remove, - .start = acpi_ec_start, - .stop = acpi_ec_stop, .suspend = acpi_ec_suspend, .resume = acpi_ec_resume, }, }; -static int __init acpi_ec_init(void) +int __init acpi_ec_init(void) { int result = 0; - if (acpi_disabled) - return 0; - acpi_ec_dir = proc_mkdir(ACPI_EC_CLASS, acpi_root_dir); if (!acpi_ec_dir) return -ENODEV; @@ -1067,8 +1141,6 @@ static int __init acpi_ec_init(void) return result; } -subsys_initcall(acpi_ec_init); - /* EC driver currently not unloadable */ #if 0 static void __exit acpi_ec_exit(void)