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kernel-ark/include/linux/acpi.h
Lennart Poettering d7a76e4cb3 ACPI: consolidate functions in acpi ec driver 
Unify the following functions:

    acpi_ec_poll_read()
    acpi_ec_poll_write()
    acpi_ec_poll_query()
    acpi_ec_intr_read()
    acpi_ec_intr_write()
    acpi_ec_intr_query()

into:

    acpi_ec_poll_transaction()
    acpi_ec_intr_transaction()

These new functions take as arguments an ACPI EC command, a few bytes
to write to the EC data register and a buffer for a few bytes to read
from the EC data register. The old _read(), _write(), _query() are
just special cases of these functions.

Then unified the code in acpi_ec_poll_transaction() and
acpi_ec_intr_transaction() a little more. Both functions are now just
wrappers around the new acpi_ec_transaction_unlocked() function. The
latter contains the EC access logic, the two original
function now just do their special way of locking and call the the
new function for the actual work.

This saves a lot of very similar code. The primary reason for doing
this, however, is that my driver for MSI 270 laptops needs to issue
some non-standard EC commands in a safe way. Due to this I added a new
exported function similar to ec_write()/ec_write() which is called
ec_transaction() and is essentially just a wrapper around
acpi_ec_{poll,intr}_transaction().

Signed-off-by: Lennart Poettering <mzxreary@0pointer.de>
Acked-by: Luming Yu <luming.yu@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-10-14 00:49:52 -04:00

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/*
* acpi.h - ACPI Interface
*
* Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* 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
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#ifndef _LINUX_ACPI_H
#define _LINUX_ACPI_H
#ifdef CONFIG_ACPI
#ifndef _LINUX
#define _LINUX
#endif
#include <linux/list.h>
#include <acpi/acpi.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_numa.h>
#include <asm/acpi.h>
#ifdef CONFIG_ACPI
enum acpi_irq_model_id {
ACPI_IRQ_MODEL_PIC = 0,
ACPI_IRQ_MODEL_IOAPIC,
ACPI_IRQ_MODEL_IOSAPIC,
ACPI_IRQ_MODEL_COUNT
};
extern enum acpi_irq_model_id acpi_irq_model;
/* Root System Description Pointer (RSDP) */
struct acpi_table_rsdp {
char signature[8];
u8 checksum;
char oem_id[6];
u8 revision;
u32 rsdt_address;
} __attribute__ ((packed));
struct acpi20_table_rsdp {
char signature[8];
u8 checksum;
char oem_id[6];
u8 revision;
u32 rsdt_address;
u32 length;
u64 xsdt_address;
u8 ext_checksum;
u8 reserved[3];
} __attribute__ ((packed));
typedef struct {
u8 type;
u8 length;
} __attribute__ ((packed)) acpi_table_entry_header;
/* Root System Description Table (RSDT) */
struct acpi_table_rsdt {
struct acpi_table_header header;
u32 entry[8];
} __attribute__ ((packed));
/* Extended System Description Table (XSDT) */
struct acpi_table_xsdt {
struct acpi_table_header header;
u64 entry[1];
} __attribute__ ((packed));
/* Fixed ACPI Description Table (FADT) */
struct acpi_table_fadt {
struct acpi_table_header header;
u32 facs_addr;
u32 dsdt_addr;
/* ... */
} __attribute__ ((packed));
/* Multiple APIC Description Table (MADT) */
struct acpi_table_madt {
struct acpi_table_header header;
u32 lapic_address;
struct {
u32 pcat_compat:1;
u32 reserved:31;
} flags;
} __attribute__ ((packed));
enum acpi_madt_entry_id {
ACPI_MADT_LAPIC = 0,
ACPI_MADT_IOAPIC,
ACPI_MADT_INT_SRC_OVR,
ACPI_MADT_NMI_SRC,
ACPI_MADT_LAPIC_NMI,
ACPI_MADT_LAPIC_ADDR_OVR,
ACPI_MADT_IOSAPIC,
ACPI_MADT_LSAPIC,
ACPI_MADT_PLAT_INT_SRC,
ACPI_MADT_ENTRY_COUNT
};
typedef struct {
u16 polarity:2;
u16 trigger:2;
u16 reserved:12;
} __attribute__ ((packed)) acpi_interrupt_flags;
struct acpi_table_lapic {
acpi_table_entry_header header;
u8 acpi_id;
u8 id;
struct {
u32 enabled:1;
u32 reserved:31;
} flags;
} __attribute__ ((packed));
struct acpi_table_ioapic {
acpi_table_entry_header header;
u8 id;
u8 reserved;
u32 address;
u32 global_irq_base;
} __attribute__ ((packed));
struct acpi_table_int_src_ovr {
acpi_table_entry_header header;
u8 bus;
u8 bus_irq;
u32 global_irq;
acpi_interrupt_flags flags;
} __attribute__ ((packed));
struct acpi_table_nmi_src {
acpi_table_entry_header header;
acpi_interrupt_flags flags;
u32 global_irq;
} __attribute__ ((packed));
struct acpi_table_lapic_nmi {
acpi_table_entry_header header;
u8 acpi_id;
acpi_interrupt_flags flags;
u8 lint;
} __attribute__ ((packed));
struct acpi_table_lapic_addr_ovr {
acpi_table_entry_header header;
u8 reserved[2];
u64 address;
} __attribute__ ((packed));
struct acpi_table_iosapic {
acpi_table_entry_header header;
u8 id;
u8 reserved;
u32 global_irq_base;
u64 address;
} __attribute__ ((packed));
struct acpi_table_lsapic {
acpi_table_entry_header header;
u8 acpi_id;
u8 id;
u8 eid;
u8 reserved[3];
struct {
u32 enabled:1;
u32 reserved:31;
} flags;
} __attribute__ ((packed));
struct acpi_table_plat_int_src {
acpi_table_entry_header header;
acpi_interrupt_flags flags;
u8 type; /* See acpi_interrupt_type */
u8 id;
u8 eid;
u8 iosapic_vector;
u32 global_irq;
struct {
u32 cpei_override_flag:1;
u32 reserved:31;
} plint_flags;
} __attribute__ ((packed));
enum acpi_interrupt_id {
ACPI_INTERRUPT_PMI = 1,
ACPI_INTERRUPT_INIT,
ACPI_INTERRUPT_CPEI,
ACPI_INTERRUPT_COUNT
};
#define ACPI_SPACE_MEM 0
struct acpi_gen_regaddr {
u8 space_id;
u8 bit_width;
u8 bit_offset;
u8 resv;
u32 addrl;
u32 addrh;
} __attribute__ ((packed));
struct acpi_table_hpet {
struct acpi_table_header header;
u32 id;
struct acpi_gen_regaddr addr;
u8 number;
u16 min_tick;
u8 page_protect;
} __attribute__ ((packed));
/*
* Simple Boot Flags
* http://www.microsoft.com/whdc/hwdev/resources/specs/simp_bios.mspx
*/
struct acpi_table_sbf
{
u8 sbf_signature[4];
u32 sbf_len;
u8 sbf_revision;
u8 sbf_csum;
u8 sbf_oemid[6];
u8 sbf_oemtable[8];
u8 sbf_revdata[4];
u8 sbf_creator[4];
u8 sbf_crearev[4];
u8 sbf_cmos;
u8 sbf_spare[3];
} __attribute__ ((packed));
/*
* System Resource Affinity Table (SRAT)
* http://www.microsoft.com/whdc/hwdev/platform/proc/SRAT.mspx
*/
struct acpi_table_srat {
struct acpi_table_header header;
u32 table_revision;
u64 reserved;
} __attribute__ ((packed));
enum acpi_srat_entry_id {
ACPI_SRAT_PROCESSOR_AFFINITY = 0,
ACPI_SRAT_MEMORY_AFFINITY,
ACPI_SRAT_ENTRY_COUNT
};
struct acpi_table_processor_affinity {
acpi_table_entry_header header;
u8 proximity_domain;
u8 apic_id;
struct {
u32 enabled:1;
u32 reserved:31;
} flags;
u8 lsapic_eid;
u8 reserved[7];
} __attribute__ ((packed));
struct acpi_table_memory_affinity {
acpi_table_entry_header header;
u8 proximity_domain;
u8 reserved1[5];
u32 base_addr_lo;
u32 base_addr_hi;
u32 length_lo;
u32 length_hi;
u32 memory_type; /* See acpi_address_range_id */
struct {
u32 enabled:1;
u32 hot_pluggable:1;
u32 reserved:30;
} flags;
u64 reserved2;
} __attribute__ ((packed));
enum acpi_address_range_id {
ACPI_ADDRESS_RANGE_MEMORY = 1,
ACPI_ADDRESS_RANGE_RESERVED = 2,
ACPI_ADDRESS_RANGE_ACPI = 3,
ACPI_ADDRESS_RANGE_NVS = 4,
ACPI_ADDRESS_RANGE_COUNT
};
/*
* System Locality Information Table (SLIT)
* see http://devresource.hp.com/devresource/docs/techpapers/ia64/slit.pdf
*/
struct acpi_table_slit {
struct acpi_table_header header;
u64 localities;
u8 entry[1]; /* real size = localities^2 */
} __attribute__ ((packed));
/* Smart Battery Description Table (SBST) */
struct acpi_table_sbst {
struct acpi_table_header header;
u32 warning; /* Warn user */
u32 low; /* Critical sleep */
u32 critical; /* Critical shutdown */
} __attribute__ ((packed));
/* Embedded Controller Boot Resources Table (ECDT) */
struct acpi_table_ecdt {
struct acpi_table_header header;
struct acpi_generic_address ec_control;
struct acpi_generic_address ec_data;
u32 uid;
u8 gpe_bit;
char ec_id[0];
} __attribute__ ((packed));
/* PCI MMCONFIG */
/* Defined in PCI Firmware Specification 3.0 */
struct acpi_table_mcfg_config {
u32 base_address;
u32 base_reserved;
u16 pci_segment_group_number;
u8 start_bus_number;
u8 end_bus_number;
u8 reserved[4];
} __attribute__ ((packed));
struct acpi_table_mcfg {
struct acpi_table_header header;
u8 reserved[8];
struct acpi_table_mcfg_config config[0];
} __attribute__ ((packed));
/* Table Handlers */
enum acpi_table_id {
ACPI_TABLE_UNKNOWN = 0,
ACPI_APIC,
ACPI_BOOT,
ACPI_DBGP,
ACPI_DSDT,
ACPI_ECDT,
ACPI_ETDT,
ACPI_FADT,
ACPI_FACS,
ACPI_OEMX,
ACPI_PSDT,
ACPI_SBST,
ACPI_SLIT,
ACPI_SPCR,
ACPI_SRAT,
ACPI_SSDT,
ACPI_SPMI,
ACPI_HPET,
ACPI_MCFG,
ACPI_TABLE_COUNT
};
typedef int (*acpi_table_handler) (unsigned long phys_addr, unsigned long size);
extern acpi_table_handler acpi_table_ops[ACPI_TABLE_COUNT];
typedef int (*acpi_madt_entry_handler) (acpi_table_entry_header *header, const unsigned long end);
char * __acpi_map_table (unsigned long phys_addr, unsigned long size);
unsigned long acpi_find_rsdp (void);
int acpi_boot_init (void);
int acpi_boot_table_init (void);
int acpi_numa_init (void);
int acpi_table_init (void);
int acpi_table_parse (enum acpi_table_id id, acpi_table_handler handler);
int acpi_get_table_header_early (enum acpi_table_id id, struct acpi_table_header **header);
int acpi_table_parse_madt (enum acpi_madt_entry_id id, acpi_madt_entry_handler handler, unsigned int max_entries);
int acpi_table_parse_srat (enum acpi_srat_entry_id id, acpi_madt_entry_handler handler, unsigned int max_entries);
int acpi_parse_mcfg (unsigned long phys_addr, unsigned long size);
void acpi_table_print (struct acpi_table_header *header, unsigned long phys_addr);
void acpi_table_print_madt_entry (acpi_table_entry_header *madt);
void acpi_table_print_srat_entry (acpi_table_entry_header *srat);
/* the following four functions are architecture-dependent */
#ifdef CONFIG_HAVE_ARCH_PARSE_SRAT
#define NR_NODE_MEMBLKS MAX_NUMNODES
#define acpi_numa_slit_init(slit) do {} while (0)
#define acpi_numa_processor_affinity_init(pa) do {} while (0)
#define acpi_numa_memory_affinity_init(ma) do {} while (0)
#define acpi_numa_arch_fixup() do {} while (0)
#else
void acpi_numa_slit_init (struct acpi_table_slit *slit);
void acpi_numa_processor_affinity_init (struct acpi_table_processor_affinity *pa);
void acpi_numa_memory_affinity_init (struct acpi_table_memory_affinity *ma);
void acpi_numa_arch_fixup(void);
#endif
#ifdef CONFIG_ACPI_HOTPLUG_CPU
/* Arch dependent functions for cpu hotplug support */
int acpi_map_lsapic(acpi_handle handle, int *pcpu);
int acpi_unmap_lsapic(int cpu);
#endif /* CONFIG_ACPI_HOTPLUG_CPU */
int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base);
int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base);
extern int acpi_mp_config;
extern struct acpi_table_mcfg_config *pci_mmcfg_config;
extern int pci_mmcfg_config_num;
extern int sbf_port;
extern unsigned long acpi_video_flags;
#else /* !CONFIG_ACPI */
#define acpi_mp_config 0
#endif /* !CONFIG_ACPI */
int acpi_register_gsi (u32 gsi, int triggering, int polarity);
int acpi_gsi_to_irq (u32 gsi, unsigned int *irq);
/*
* This function undoes the effect of one call to acpi_register_gsi().
* If this matches the last registration, any IRQ resources for gsi
* are freed.
*/
void acpi_unregister_gsi (u32 gsi);
#ifdef CONFIG_ACPI
struct acpi_prt_entry {
struct list_head node;
struct acpi_pci_id id;
u8 pin;
struct {
acpi_handle handle;
u32 index;
} link;
u32 irq;
};
struct acpi_prt_list {
int count;
struct list_head entries;
};
struct pci_dev;
int acpi_pci_irq_enable (struct pci_dev *dev);
void acpi_penalize_isa_irq(int irq, int active);
void acpi_pci_irq_disable (struct pci_dev *dev);
struct acpi_pci_driver {
struct acpi_pci_driver *next;
int (*add)(acpi_handle handle);
void (*remove)(acpi_handle handle);
};
int acpi_pci_register_driver(struct acpi_pci_driver *driver);
void acpi_pci_unregister_driver(struct acpi_pci_driver *driver);
#endif /* CONFIG_ACPI */
#ifdef CONFIG_ACPI_EC
extern int ec_read(u8 addr, u8 *val);
extern int ec_write(u8 addr, u8 val);
extern int ec_transaction(u8 command,
const u8 *wdata, unsigned wdata_len,
u8 *rdata, unsigned rdata_len);
#endif /*CONFIG_ACPI_EC*/
extern int acpi_blacklisted(void);
extern void acpi_bios_year(char *s);
#define ACPI_CSTATE_LIMIT_DEFINED /* for driver builds */
#ifdef CONFIG_ACPI
/*
* Set highest legal C-state
* 0: C0 okay, but not C1
* 1: C1 okay, but not C2
* 2: C2 okay, but not C3 etc.
*/
extern unsigned int max_cstate;
static inline unsigned int acpi_get_cstate_limit(void)
{
return max_cstate;
}
static inline void acpi_set_cstate_limit(unsigned int new_limit)
{
max_cstate = new_limit;
return;
}
#else
static inline unsigned int acpi_get_cstate_limit(void) { return 0; }
static inline void acpi_set_cstate_limit(unsigned int new_limit) { return; }
#endif
#ifdef CONFIG_ACPI_NUMA
int acpi_get_pxm(acpi_handle handle);
int acpi_get_node(acpi_handle *handle);
#else
static inline int acpi_get_pxm(acpi_handle handle)
{
return 0;
}
static inline int acpi_get_node(acpi_handle *handle)
{
return 0;
}
#endif
extern int acpi_paddr_to_node(u64 start_addr, u64 size);
extern int pnpacpi_disabled;
#else /* CONFIG_ACPI */
static inline int acpi_boot_init(void)
{
return 0;
}
static inline int acpi_boot_table_init(void)
{
return 0;
}
#endif /* CONFIG_ACPI */
#endif /*_LINUX_ACPI_H*/
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