diff options
| -rw-r--r-- | drivers/acpi/ec.c | 124 |
1 files changed, 45 insertions, 79 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 0f232e719da..ae05e8c1148 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -72,7 +72,7 @@ enum { enum { EC_INTR = 1, /* Output buffer full */ - EC_POLL, /* Input buffer empty */ + EC_POLL, /* Input buffer empty */ }; static int acpi_ec_remove(struct acpi_device *device, int type); @@ -91,22 +91,20 @@ static struct acpi_driver acpi_ec_driver = { .stop = acpi_ec_stop, }, }; + +/* If we find an EC via the ECDT, we need to keep a ptr to its context */ struct acpi_ec { 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 command_addr; + unsigned long data_addr; unsigned long global_lock; struct semaphore sem; unsigned int expect_event; atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */ wait_queue_head_t wait; -}; - -/* If we find an EC via the ECDT, we need to keep a ptr to its context */ -static struct acpi_ec *ec_ecdt; +} *ec_ecdt; /* External interfaces use first EC only, so remember */ static struct acpi_device *first_ec; @@ -116,34 +114,28 @@ static int acpi_ec_mode = EC_INTR; Transaction Management -------------------------------------------------------------------------- */ -static u32 acpi_ec_read_status(struct acpi_ec *ec) +static inline u8 acpi_ec_read_status(struct acpi_ec *ec) { - u32 status = 0; - - acpi_hw_low_level_read(8, &status, &ec->status_addr); - return status; + return inb(ec->command_addr); } -static u32 acpi_ec_read_data(struct acpi_ec *ec) +static inline u8 acpi_ec_read_data(struct acpi_ec *ec) { - u32 data = 0; - - acpi_hw_low_level_read(8, &data, &ec->data_addr); - return data; + return inb(ec->data_addr); } -static void acpi_ec_write_cmd(struct acpi_ec *ec, u32 command) +static inline void acpi_ec_write_cmd(struct acpi_ec *ec, u8 command) { - acpi_hw_low_level_write(8, command, &ec->command_addr); + outb(command, ec->command_addr); } -static void acpi_ec_write_data(struct acpi_ec *ec, u32 data) +static inline void acpi_ec_write_data(struct acpi_ec *ec, u8 data) { - acpi_hw_low_level_write(8, data, &ec->data_addr); + outb(data, ec->data_addr); } -static int acpi_ec_check_status(u32 status, u8 event) { - +static int acpi_ec_check_status(u8 status, u8 event) +{ switch (event) { case ACPI_EC_EVENT_OBF_1: if (status & ACPI_EC_FLAG_OBF) @@ -201,8 +193,8 @@ static int acpi_ec_wait(struct acpi_ec *ec, u8 event) */ int acpi_ec_enter_burst_mode(struct acpi_ec *ec) { - u32 tmp = 0; - u32 status = 0; + u8 tmp = 0; + u8 status = 0; status = acpi_ec_read_status(ec); @@ -227,7 +219,7 @@ int acpi_ec_enter_burst_mode(struct acpi_ec *ec) int acpi_ec_leave_burst_mode(struct acpi_ec *ec) { - u32 status = 0; + u8 status = 0; status = acpi_ec_read_status(ec); @@ -268,14 +260,11 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, } for (; rdata_len > 0; rdata_len --) { - u32 d; - result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1); if (result) return result; - d = acpi_ec_read_data(ec); - *(rdata++) = (u8) d; + *(rdata++) = acpi_ec_read_data(ec); } return 0; @@ -320,7 +309,7 @@ end: return status; } -static int acpi_ec_read(struct acpi_ec *ec, u8 address, u32 * data) +static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 *data) { int result; u8 d; @@ -330,6 +319,7 @@ static int acpi_ec_read(struct acpi_ec *ec, u8 address, u32 * data) *data = d; return result; } + static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data) { u8 wdata[2] = { address, data }; @@ -340,11 +330,11 @@ 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_read(u8 addr, u8 * val) +int ec_read(u8 addr, u8 *val) { struct acpi_ec *ec; int err; - u32 temp_data; + u8 temp_data; if (!first_ec) return -ENODEV; @@ -394,7 +384,7 @@ extern int ec_transaction(u8 command, wdata_len, rdata, rdata_len); } -static int acpi_ec_query(struct acpi_ec *ec, u32 * data) +static int acpi_ec_query(struct acpi_ec *ec, u8 *data) { int result; u8 d; @@ -431,14 +421,10 @@ struct acpi_ec_query_data { static void acpi_ec_gpe_query(void *ec_cxt) { struct acpi_ec *ec = (struct acpi_ec *)ec_cxt; - u32 value = 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' - }; - + u8 value = 0; + static char object_name[8]; - if (!ec_cxt) + if (!ec) goto end; value = acpi_ec_read_status(ec); @@ -449,8 +435,7 @@ static void acpi_ec_gpe_query(void *ec_cxt) if (acpi_ec_query(ec, &value)) goto end; - object_name[2] = hex[((value >> 4) & 0x0F)]; - object_name[3] = hex[(value & 0x0F)]; + snprintf(object_name, 8, "_Q%2.2X", value); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s", object_name)); @@ -463,8 +448,7 @@ static void acpi_ec_gpe_query(void *ec_cxt) static u32 acpi_ec_gpe_handler(void *data) { acpi_status status = AE_OK; - u32 value; - u8 exec_mode; + u8 value; struct acpi_ec *ec = (struct acpi_ec *)data; acpi_clear_gpe(NULL, ec->gpe_bit, ACPI_ISR); @@ -475,13 +459,10 @@ static u32 acpi_ec_gpe_handler(void *data) ec->expect_event = 0; wake_up(&ec->wait); } - exec_mode = OSL_EC_BURST_HANDLER; - } else { - exec_mode = OSL_EC_POLL_HANDLER; } if (value & ACPI_EC_FLAG_SCI) { - status = acpi_os_execute(exec_mode, acpi_ec_gpe_query, ec); + status = acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec); return status == AE_OK ? ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; } @@ -535,7 +516,7 @@ acpi_ec_space_handler(u32 function, switch (function) { case ACPI_READ: temp = 0; - result = acpi_ec_read(ec, (u8) address, (u32 *) & temp); + result = acpi_ec_read(ec, (u8) address, (u8 *) &temp); break; case ACPI_WRITE: result = acpi_ec_write(ec, (u8) address, (u8) temp); @@ -595,8 +576,8 @@ static int acpi_ec_read_info(struct seq_file *seq, void *offset) seq_printf(seq, "gpe bit: 0x%02x\n", (u32) ec->gpe_bit); seq_printf(seq, "ports: 0x%02x, 0x%02x\n", - (u32) ec->status_addr.address, - (u32) ec->data_addr.address); + (u32) ec->command_addr, + (u32) ec->data_addr); seq_printf(seq, "use global lock: %s\n", ec->global_lock ? "yes" : "no"); acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR); @@ -752,7 +733,6 @@ static acpi_status acpi_ec_io_ports(struct acpi_resource *resource, void *context) { struct acpi_ec *ec = (struct acpi_ec *)context; - struct acpi_generic_address *addr; if (resource->type != ACPI_RESOURCE_TYPE_IO) { return AE_OK; @@ -763,19 +743,14 @@ acpi_ec_io_ports(struct acpi_resource *resource, void *context) * the second address region returned is the status/command * port. */ - if (ec->data_addr.register_bit_width == 0) { - addr = &ec->data_addr; - } else if (ec->command_addr.register_bit_width == 0) { - addr = &ec->command_addr; + if (ec->data_addr == 0) { + ec->data_addr = resource->data.io.minimum; + } else if (ec->command_addr == 0) { + ec->command_addr = resource->data.io.minimum; } 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.minimum; - return AE_OK; } @@ -798,19 +773,14 @@ static int acpi_ec_start(struct acpi_device *device) */ status = acpi_walk_resources(ec->handle, METHOD_NAME__CRS, acpi_ec_io_ports, ec); - if (ACPI_FAILURE(status) - || ec->command_addr.register_bit_width == 0) { + if (ACPI_FAILURE(status) || ec->command_addr == 0) { ACPI_EXCEPTION((AE_INFO, status, "Error getting I/O port addresses")); return -ENODEV; } - ec->status_addr = ec->command_addr; - - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x", - (u32) ec->gpe_bit, - (u32) ec->command_addr.address, - (u32) ec->data_addr.address)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02lx, ports=0x%2lx,0x%2lx", + ec->gpe_bit, ec->command_addr, ec->data_addr)); /* * Install GPE handler @@ -877,7 +847,6 @@ acpi_fake_ecdt_callback(acpi_handle handle, acpi_ec_io_ports, ec_ecdt); if (ACPI_FAILURE(status)) return status; - ec_ecdt->status_addr = ec_ecdt->command_addr; ec_ecdt->uid = -1; acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid); @@ -890,10 +859,8 @@ acpi_fake_ecdt_callback(acpi_handle handle, ec_ecdt->global_lock = TRUE; ec_ecdt->handle = handle; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02x, ports=0x%2x, 0x%2x", - (u32) ec_ecdt->gpe_bit, - (u32) ec_ecdt->command_addr.address, - (u32) ec_ecdt->data_addr.address)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02lx, ports=0x%2lx, 0x%2lx", + ec_ecdt->gpe_bit, ec_ecdt->command_addr, ec_ecdt->data_addr)); return AE_CTRL_TERMINATE; } @@ -961,9 +928,8 @@ static int __init acpi_ec_get_real_ecdt(void) if (acpi_ec_mode == EC_INTR) { init_waitqueue_head(&ec_ecdt->wait); } - ec_ecdt->command_addr = ecdt_ptr->ec_control; - ec_ecdt->status_addr = ecdt_ptr->ec_control; - ec_ecdt->data_addr = ecdt_ptr->ec_data; + ec_ecdt->command_addr = ecdt_ptr->ec_control.address; + ec_ecdt->data_addr = ecdt_ptr->ec_data.address; ec_ecdt->gpe_bit = ecdt_ptr->gpe_bit; /* use the GL just to be safe */ ec_ecdt->global_lock = TRUE; |