0   _i_I|+. /* SPDX-License-Identifier: GPL-2.0 */ #ifndef STICORE_H #define STICORE_H struct device; /* generic STI structures & functions */ #define MAX_STI_ROMS 4 /* max no. of ROMs which this driver handles */ #define STI_REGION_MAX 8 /* hardcoded STI constants */ #define STI_DEV_NAME_LENGTH 32 #define STI_MONITOR_MAX 256 #define STI_FONT_HPROMAN8 1 #define STI_FONT_KANA8 2 #define ALT_CODE_TYPE_UNKNOWN 0x00 /* alt code type values */ #define ALT_CODE_TYPE_PA_RISC_64 0x01 /* The latency of the STI functions cannot really be reduced by setting * this to 0; STI doesn't seem to be designed to allow calling a different * function (or the same function with different arguments) after a * function exited with 1 as return value. * * As all of the functions below could be called from interrupt context, * we have to spin_lock_irqsave around the do { ret = bla(); } while(ret==1) * block. Really bad latency there. * * Probably the best solution to all this is have the generic code manage * the screen buffer and a kernel thread to call STI occasionally. * * Luckily, the frame buffer guys have the same problem so we can just wait * for them to fix it and steal their solution. prumpf */ #include #define STI_WAIT 1 #define STI_PTR(p) ( virt_to_phys(p) ) #define PTR_STI(p) ( phys_to_virt((unsigned long)p) ) #define sti_onscreen_x(sti) (sti->glob_cfg->onscreen_x) #define sti_onscreen_y(sti) (sti->glob_cfg->onscreen_y) /* sti_font_xy() use the native font ROM ! */ #define sti_font_x(sti) (PTR_STI(sti->font)->width) #define sti_font_y(sti) (PTR_STI(sti->font)->height) #ifdef CONFIG_64BIT #define STI_LOWMEM (GFP_KERNEL | GFP_DMA) #else #define STI_LOWMEM (GFP_KERNEL) #endif /* STI function configuration structs */ typedef union region { struct { u32 offset : 14; /* offset in 4kbyte page */ u32 sys_only : 1; /* don't map to user space */ u32 cache : 1; /* map to data cache */ u32 btlb : 1; /* map to block tlb */ u32 last : 1; /* last region in list */ u32 length : 14; /* length in 4kbyte page */ } region_desc; u32 region; /* complete region value */ } region_t; #define REGION_OFFSET_TO_PHYS( rt, hpa ) \ (((rt).region_desc.offset << 12) + (hpa)) struct sti_glob_cfg_ext { u8 curr_mon; /* current monitor configured */ u8 friendly_boot; /* in friendly boot mode */ s16 power; /* power calculation (in Watts) */ s32 freq_ref; /* frequency reference */ u32 sti_mem_addr; /* pointer to global sti memory (size=sti_mem_request) */ u32 future_ptr; /* pointer to future data */ }; struct sti_glob_cfg { s32 text_planes; /* number of planes used for text */ s16 onscreen_x; /* screen width in pixels */ s16 onscreen_y; /* screen height in pixels */ s16 offscreen_x; /* offset width in pixels */ s16 offscreen_y; /* offset height in pixels */ s16 total_x; /* frame buffer width in pixels */ s16 total_y; /* frame buffer height in pixels */ u32 region_ptrs[STI_REGION_MAX]; /* region pointers */ s32 reent_lvl; /* storage for reentry level value */ u32 save_addr; /* where to save or restore reentrant state */ u32 ext_ptr; /* pointer to extended glob_cfg data structure */ }; /* STI init function structs */ struct sti_init_flags { u32 wait : 1; /* should routine idle wait or not */ u32 reset : 1; /* hard reset the device? */ u32 text : 1; /* turn on text display planes? */ u32 nontext : 1; /* turn on non-text display planes? */ u32 clear : 1; /* clear text display planes? */ u32 cmap_blk : 1; /* non-text planes cmap black? */ u32 enable_be_timer : 1; /* enable bus error timer */ u32 enable_be_int : 1; /* enable bus error timer interrupt */ u32 no_chg_tx : 1; /* don't change text settings */ u32 no_chg_ntx : 1; /* don't change non-text settings */ u32 no_chg_bet : 1; /* don't change berr timer settings */ u32 no_chg_bei : 1; /* don't change berr int settings */ u32 init_cmap_tx : 1; /* initialize cmap for text planes */ u32 cmt_chg : 1; /* change current monitor type */ u32 retain_ie : 1; /* don't allow