/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * pnpbios.h - contains local definitions
 */

/*
 * Include file for the interface to a PnP BIOS
 *
 * Original BIOS code (C) 1998 Christian Schmidt (chr.schmidt@tu-bs.de)
 * PnP handler parts (c) 1998 Tom Lees <tom@lpsg.demon.co.uk>
 * Minor reorganizations by David Hinds <dahinds@users.sourceforge.net>
 */

/*
 * Return codes
 */
#define PNP_SUCCESS                     0x00
#define PNP_NOT_SET_STATICALLY          0x7f
#define PNP_UNKNOWN_FUNCTION            0x81
#define PNP_FUNCTION_NOT_SUPPORTED      0x82
#define PNP_INVALID_HANDLE              0x83
#define PNP_BAD_PARAMETER               0x84
#define PNP_SET_FAILED                  0x85
#define PNP_EVENTS_NOT_PENDING          0x86
#define PNP_SYSTEM_NOT_DOCKED           0x87
#define PNP_NO_ISA_PNP_CARDS            0x88
#define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89
#define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY 0x8a
#define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b
#define PNP_BUFFER_TOO_SMALL            0x8c
#define PNP_USE_ESCD_SUPPORT            0x8d
#define PNP_MESSAGE_NOT_SUPPORTED       0x8e
#define PNP_HARDWARE_ERROR              0x8f

#define ESCD_SUCCESS                    0x00
#define ESCD_IO_ERROR_READING           0x55
#define ESCD_INVALID                    0x56
#define ESCD_BUFFER_TOO_SMALL           0x59
#define ESCD_NVRAM_TOO_SMALL            0x5a
#define ESCD_FUNCTION_NOT_SUPPORTED     0x81

/*
 * Events that can be received by "get event"
 */
#define PNPEV_ABOUT_TO_CHANGE_CONFIG    0x0001
#define PNPEV_DOCK_CHANGED              0x0002
#define PNPEV_SYSTEM_DEVICE_CHANGED     0x0003
#define PNPEV_CONFIG_CHANGED_FAILED     0x0004
#define PNPEV_UNKNOWN_SYSTEM_EVENT      0xffff
/* 0x8000 through 0xfffe are OEM defined */

/*
 * Messages that should be sent through "send message"
 */
#define PNPMSG_OK                       0x00
#define PNPMSG_ABORT                    0x01
#define PNPMSG_UNDOCK_DEFAULT_ACTION    0x40
#define PNPMSG_POWER_OFF                0x41
#define PNPMSG_PNP_OS_ACTIVE            0x42
#define PNPMSG_PNP_OS_INACTIVE          0x43

/*
 * Plug and Play BIOS flags
 */
#define PNPBIOS_NO_DISABLE              0x0001
#define PNPBIOS_NO_CONFIG               0x0002
#define PNPBIOS_OUTPUT                  0x0004
#define PNPBIOS_INPUT                   0x0008
#define PNPBIOS_BOOTABLE                0x0010
#define PNPBIOS_DOCK                    0x0020
#define PNPBIOS_REMOVABLE               0x0040
#define pnpbios_is_static(x) (((x)->flags & 0x0100) == 0x0000)
#define pnpbios_is_dynamic(x) ((x)->flags & 0x0080)

/*
 * Function Parameters
 */
#define PNPMODE_STATIC 1
#define PNPMODE_DYNAMIC 0

/* 0x8000 through 0xffff are OEM defined */

#pragma pack(1)
struct pnp_dev_node_info {
        __u16 no_nodes;
        __u16 max_node_size;
};
struct pnp_docking_station_info {
        __u32 location_id;
        __u32 serial;
        __u16 capabilities;
};
struct pnp_isa_config_struc {
        __u8 revision;
        __u8 no_csns;
        __u16 isa_rd_data_port;
        __u16 reserved;
};
struct escd_info_struc {
        __u16 min_escd_write_size;
        __u16 escd_size;
        __u32 nv_storage_base;
};
struct pnp_bios_node {
        __u16 size;
        __u8 handle;
        __u32 eisa_id;
        __u8 type_code[3];
        __u16 flags;
        __u8 data[];
};
#pragma pack()

/* non-exported */
extern struct pnp_dev_node_info node_info;

extern int pnp_bios_dev_node_info(struct pnp_dev_node_info *data);
extern int pnp_bios_get_dev_node(u8 *nodenum, char config,
                                 struct pnp_bios_node *data);
extern int pnp_bios_set_dev_node(u8 nodenum, char config,
                                 struct pnp_bios_node *data);
extern int pnp_bios_get_stat_res(char *info);
extern int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data);
extern int pnp_bios_escd_info(struct escd_info_struc *data);
extern int pnp_bios_read_escd(char *data, u32 nvram_base);
extern int pnp_bios_dock_station_info(struct pnp_docking_station_info *data);

#pragma pack(1)
union pnp_bios_install_struct {
        struct {
                u32 signature;    /* "$PnP" */
                u8 version;       /* in BCD */
                u8 length;        /* length in bytes, currently 21h */
                u16 control;      /* system capabilities */
                u8 checksum;      /* all bytes must add up to 0 */

                u32 eventflag;    /* phys. address of the event flag */
                u16 rmoffset;     /* real mode entry point */
                u16 rmcseg;
                u16 pm16offset;   /* 16 bit protected mode entry */
                u32 pm16cseg;
                u32 deviceID;     /* EISA encoded system ID or 0 */
                u16 rmdseg;       /* real mode data segment */
                u32 pm16dseg;     /* 16 bit pm data segment base */
        } fields;
        char chars[0x21];         /* To calculate the checksum */
};
#pragma pack()

extern int pnp_bios_present(void);
extern int  pnpbios_dont_use_current_config;

extern int pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node);
extern int pnpbios_read_resources_from_node(struct pnp_dev *dev, struct pnp_bios_node *node);
extern int pnpbios_write_resources_to_node(struct pnp_dev *dev, struct pnp_bios_node *node);

extern void pnpbios_print_status(const char * module, u16 status);
extern void pnpbios_calls_init(union pnp_bios_install_struct * header);

#ifdef CONFIG_PNPBIOS_PROC_FS
extern int pnpbios_interface_attach_device(struct pnp_bios_node * node);
extern int pnpbios_proc_init (void);
extern void pnpbios_proc_exit (void);
#else
static inline int pnpbios_interface_attach_device(struct pnp_bios_node * node) { return 0; }
static inline int pnpbios_proc_init (void) { return 0; }
static inline void pnpbios_proc_exit (void) { ; }
#endif /* CONFIG_PNPBIOS_PROC_FS */