1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * pnpbios.h - contains local definitions 4 */ 5 6 /* 7 * Include file for the interface to a PnP BIOS 8 * 9 * Original BIOS code (C) 1998 Christian Schmidt (chr.schmidt@tu-bs.de) 10 * PnP handler parts (c) 1998 Tom Lees <tom@lpsg.demon.co.uk> 11 * Minor reorganizations by David Hinds <dahinds@users.sourceforge.net> 12 */ 13 14 /* 15 * Return codes 16 */ 17 #define PNP_SUCCESS 0x00 18 #define PNP_NOT_SET_STATICALLY 0x7f 19 #define PNP_UNKNOWN_FUNCTION 0x81 20 #define PNP_FUNCTION_NOT_SUPPORTED 0x82 21 #define PNP_INVALID_HANDLE 0x83 22 #define PNP_BAD_PARAMETER 0x84 23 #define PNP_SET_FAILED 0x85 24 #define PNP_EVENTS_NOT_PENDING 0x86 25 #define PNP_SYSTEM_NOT_DOCKED 0x87 26 #define PNP_NO_ISA_PNP_CARDS 0x88 27 #define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89 28 #define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY 0x8a 29 #define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b 30 #define PNP_BUFFER_TOO_SMALL 0x8c 31 #define PNP_USE_ESCD_SUPPORT 0x8d 32 #define PNP_MESSAGE_NOT_SUPPORTED 0x8e 33 #define PNP_HARDWARE_ERROR 0x8f 34 35 #define ESCD_SUCCESS 0x00 36 #define ESCD_IO_ERROR_READING 0x55 37 #define ESCD_INVALID 0x56 38 #define ESCD_BUFFER_TOO_SMALL 0x59 39 #define ESCD_NVRAM_TOO_SMALL 0x5a 40 #define ESCD_FUNCTION_NOT_SUPPORTED 0x81 41 42 /* 43 * Events that can be received by "get event" 44 */ 45 #define PNPEV_ABOUT_TO_CHANGE_CONFIG 0x0001 46 #define PNPEV_DOCK_CHANGED 0x0002 47 #define PNPEV_SYSTEM_DEVICE_CHANGED 0x0003 48 #define PNPEV_CONFIG_CHANGED_FAILED 0x0004 49 #define PNPEV_UNKNOWN_SYSTEM_EVENT 0xffff 50 /* 0x8000 through 0xfffe are OEM defined */ 51 52 /* 53 * Messages that should be sent through "send message" 54 */ 55 #define PNPMSG_OK 0x00 56 #define PNPMSG_ABORT 0x01 57 #define PNPMSG_UNDOCK_DEFAULT_ACTION 0x40 58 #define PNPMSG_POWER_OFF 0x41 59 #define PNPMSG_PNP_OS_ACTIVE 0x42 60 #define PNPMSG_PNP_OS_INACTIVE 0x43 61 62 /* 63 * Plug and Play BIOS flags 64 */ 65 #define PNPBIOS_NO_DISABLE 0x0001 66 #define PNPBIOS_NO_CONFIG 0x0002 67 #define PNPBIOS_OUTPUT 0x0004 68 #define PNPBIOS_INPUT 0x0008 69 #define PNPBIOS_BOOTABLE 0x0010 70 #define PNPBIOS_DOCK 0x0020 71 #define PNPBIOS_REMOVABLE 0x0040 72 #define pnpbios_is_static(x) (((x)->flags & 0x0100) == 0x0000) 73 #define pnpbios_is_dynamic(x) ((x)->flags & 0x0080) 74 75 /* 76 * Function Parameters 77 */ 78 #define PNPMODE_STATIC 1 79 #define PNPMODE_DYNAMIC 0 80 81 /* 0x8000 through 0xffff are OEM defined */ 82 83 #pragma pack(1) 84 struct pnp_dev_node_info { 85 __u16 no_nodes; 86 __u16 max_node_size; 87 }; 88 struct pnp_docking_station_info { 89 __u32 location_id; 90 __u32 serial; 91 __u16 capabilities; 92 }; 93 struct pnp_isa_config_struc { 94 __u8 revision; 95 __u8 no_csns; 96 __u16 isa_rd_data_port; 97 __u16 reserved; 98 }; 99 struct escd_info_struc { 100 __u16 min_escd_write_size; 101 __u16 escd_size; 102 __u32 nv_storage_base; 103 }; 104 struct pnp_bios_node { 105 __u16 size; 106 __u8 handle; 107 __u32 eisa_id; 108 __u8 type_code[3]; 109 __u16 flags; 110 __u8 data[]; 111 }; 112 #pragma pack() 113 114 /* non-exported */ 115 extern struct pnp_dev_node_info node_info; 116 117 extern int pnp_bios_dev_node_info(struct pnp_dev_node_info *data); 118 extern int pnp_bios_get_dev_node(u8 *nodenum, char config, 119 struct pnp_bios_node *data); 120 extern int pnp_bios_set_dev_node(u8 nodenum, char config, 121 struct pnp_bios_node *data); 122 extern int pnp_bios_get_stat_res(char *info); 123 extern int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data); 124 extern int pnp_bios_escd_info(struct escd_info_struc *data); 125 extern int pnp_bios_read_escd(char *data, u32 nvram_base); 126 extern int pnp_bios_dock_station_info(struct pnp_docking_station_info *data); 127 128 #pragma pack(1) 129 union pnp_bios_install_struct { 130 struct { 131 u32 signature; /* "$PnP" */ 132 u8 version; /* in BCD */ 133 u8 length; /* length in bytes, currently 21h */ 134 u16 control; /* system capabilities */ 135 u8 checksum; /* all bytes must add up to 0 */ 136 137 u32 eventflag; /* phys. address of the event flag */ 138 u16 rmoffset; /* real mode entry point */ 139 u16 rmcseg; 140 u16 pm16offset; /* 16 bit protected mode entry */ 141 u32 pm16cseg; 142 u32 deviceID; /* EISA encoded system ID or 0 */ 143 u16 rmdseg; /* real mode data segment */ 144 u32 pm16dseg; /* 16 bit pm data segment base */ 145 } fields; 146 char chars[0x21]; /* To calculate the checksum */ 147 }; 148 #pragma pack() 149 150 extern int pnp_bios_present(void); 151 extern int pnpbios_dont_use_current_config; 152 153 extern int pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node); 154 extern int pnpbios_read_resources_from_node(struct pnp_dev *dev, struct pnp_bios_node *node); 155 extern int pnpbios_write_resources_to_node(struct pnp_dev *dev, struct pnp_bios_node *node); 156 157 extern void pnpbios_print_status(const char * module, u16 status); 158 extern void pnpbios_calls_init(union pnp_bios_install_struct * header); 159 160 #ifdef CONFIG_PNPBIOS_PROC_FS 161 extern int pnpbios_interface_attach_device(struct pnp_bios_node * node); 162 extern int pnpbios_proc_init (void); 163 extern void pnpbios_proc_exit (void); 164 #else pnpbios_interface_attach_device(struct pnp_bios_node * node)165 static inline int pnpbios_interface_attach_device(struct pnp_bios_node * node) { return 0; } pnpbios_proc_init(void)166 static inline int pnpbios_proc_init (void) { return 0; } pnpbios_proc_exit(void)167 static inline void pnpbios_proc_exit (void) { ; } 168 #endif /* CONFIG_PNPBIOS_PROC_FS */ 169