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linux/drivers/video/sticore.h
Helge Deller 0219132fe7 parisc: sticon - unbreak on 64bit kernel 
STI text console (sticon) was broken on 64bit machines with more than
4GB RAM and this lead in some cases to a kernel crash.

Since sticon uses the 32bit STI API it needs to keep pointers to memory
below 4GB. But on a 64bit kernel some memory regions (e.g. the kernel
stack) might be above 4GB which then may crash the kernel in the STI
functions.

Additionally sticon didn't selected the built-in framebuffer fonts by
default. This is now fixed.

On a side-note: Theoretically we could enhance the sticon driver to
use the 64bit STI API. But - beside the fact that some machines don't
provide a 64bit STI ROM - this would just add complexity.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # 3.8+
2013-11-07 22:46:20 +01:00

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#ifndef STICORE_H
#define STICORE_H
/* generic STI structures & functions */
#if 0
#define DPRINTK(x) printk x
#else
#define DPRINTK(x)
#endif
#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 <asm/io.h>
#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 reset to clear int enables */
u32 caller_bootrom : 1; /* set only by bootrom for each call */
u32 caller_kernel : 1; /* set only by kernel for each call */
u32 caller_other : 1; /* set only by non-[BR/K] caller */
u32 pad : 14; /* pad to word boundary */
u32 future_ptr; /* pointer to future data */
};
struct sti_init_inptr_ext {
u8 config_mon_type; /* configure to monitor type */
u8 pad[1]; /* pad to word boundary */
u16 inflight_data; /* inflight data possible on PCI */
u32 future_ptr; /* pointer to future data */
};
struct sti_init_inptr {
s32 text_planes; /* number of planes to use for text */
u32 ext_ptr; /* pointer to extended init_graph inptr data structure*/
};
struct sti_init_outptr {
s32 errno; /* error number on failure */
s32 text_planes; /* number of planes used for text */
u32 future_ptr; /* pointer to future data */
};
/* STI configuration function structs */
struct sti_conf_flags {
u32 wait : 1; /* should routine idle wait or not */
u32 pad : 31; /* pad to word boundary */
u32 future_ptr; /* pointer to future data */
};
struct sti_conf_inptr {
u32 future_ptr; /* pointer to future data */
};
struct sti_conf_outptr_ext {
u32 crt_config[3]; /* hardware specific X11/OGL information */
u32 crt_hdw[3];
u32 future_ptr;
};
struct sti_conf_outptr {
s32 errno; /* error number on failure */
s16 onscreen_x; /* screen width in pixels */
s16 onscreen_y; /* screen height in pixels */
s16 offscreen_x; /* offscreen width in pixels */
s16 offscreen_y; /* offscreen height in pixels */
s16 total_x; /* frame buffer width in pixels */
s16 total_y; /* frame buffer height in pixels */
s32 bits_per_pixel; /* bits/pixel device has configured */
s32 bits_used; /* bits which can be accessed */
s32 planes; /* number of fb planes in system */
u8 dev_name[STI_DEV_NAME_LENGTH]; /* null terminated product name */
u32 attributes; /* flags denoting attributes */
u32 ext_ptr; /* pointer to future data */
};
struct sti_rom {
u8 type[4];
u8 res004;
u8 num_mons;
u8 revno[2];
u32 graphics_id[2];
u32 font_start;
u32 statesize;
u32 last_addr;
u32 region_list;
u16 reentsize;
u16 maxtime;
u32 mon_tbl_addr;
u32 user_data_addr;
u32 sti_mem_req;
u32 user_data_size;
u16 power;
u8 bus_support;
u8 ext_bus_support;
u8 alt_code_type;
u8 ext_dd_struct[3];
u32 cfb_addr;
u32 init_graph;
u32 state_mgmt;
u32 font_unpmv;
u32 block_move;
u32 self_test;
u32 excep_hdlr;
u32 inq_conf;
u32 set_cm_entry;
u32 dma_ctrl;
u8 res040[7 * 4];
u32 init_graph_addr;
u32 state_mgmt_addr;
u32 font_unp_addr;
u32 block_move_addr;
u32 self_test_addr;
u32 excep_hdlr_addr;
u32 inq_conf_addr;
u32 set_cm_entry_addr;
u32 image_unpack_addr;
u32 pa_risx_addrs[7];
};
struct sti_rom_font {
u16 first_char;
u16 last_char;
u8 width;
u8 height;
u8 font_type; /* language type */
u8 bytes_per_char;
u32 next_font;
u8 underline_height;
u8 underline_pos;
u8 res008[2];
};
/* sticore internal font handling */
struct sti_cooked_font {
struct sti_rom_font *raw;
struct sti_cooked_font *next_font;
};
struct sti_cooked_rom {
struct sti_rom *raw;
struct sti_cooked_font *font_start;
};
/* STI font printing function structs */
struct sti_font_inptr {
u32 font_start_addr; /* address of font start */
s16 index; /* index into font table of character */
u8 fg_color; /* foreground color of character */
u8 bg_color; /* background color of character */
s16 dest_x; /* X location of character upper left */
s16 dest_y; /* Y location of character upper left */
u32 future_ptr; /* pointer to future data */
};
struct sti_font_flags {
u32 wait : 1; /* should routine idle wait or not */
u32 non_text : 1; /* font unpack/move in non_text planes =1, text =0 */
u32 pad : 30; /* pad to word boundary */
u32 future_ptr; /* pointer to future data */
};
struct sti_font_outptr {
s32 errno; /* error number on failure */
u32 future_ptr; /* pointer to future data */
};
/* STI blockmove structs */
struct sti_blkmv_flags {
u32 wait : 1; /* should routine idle wait or not */
u32 color : 1; /* change color during move? */
u32 clear : 1; /* clear during move? */
u32 non_text : 1; /* block move in non_text planes =1, text =0 */
u32 pad : 28; /* pad to word boundary */
u32 future_ptr; /* pointer to future data */
};
struct sti_blkmv_inptr {
u8 fg_color; /* foreground color after move */
u8 bg_color; /* background color after move */
s16 src_x; /* source upper left pixel x location */
s16 src_y; /* source upper left pixel y location */
s16 dest_x; /* dest upper left pixel x location */
s16 dest_y; /* dest upper left pixel y location */
s16 width; /* block width in pixels */
s16 height; /* block height in pixels */
u32 future_ptr; /* pointer to future data */
};
struct sti_blkmv_outptr {
s32 errno; /* error number on failure */
u32 future_ptr; /* pointer to future data */
};
/* sti_all_data is an internal struct which needs to be allocated in
* low memory (< 4GB) if STI is used with 32bit STI on a 64bit kernel */
struct sti_all_data {
struct sti_glob_cfg glob_cfg;
struct sti_glob_cfg_ext glob_cfg_ext;
struct sti_conf_inptr inq_inptr;
struct sti_conf_outptr inq_outptr; /* configuration */
struct sti_conf_outptr_ext inq_outptr_ext;
struct sti_init_inptr_ext init_inptr_ext;
struct sti_init_inptr init_inptr;
struct sti_init_outptr init_outptr;
struct sti_blkmv_inptr blkmv_inptr;
struct sti_blkmv_outptr blkmv_outptr;
struct sti_font_inptr font_inptr;
struct sti_font_outptr font_outptr;
/* leave as last entries */
unsigned long save_addr[1024 / sizeof(unsigned long)];
/* min 256 bytes which is STI default, max sti->sti_mem_request */
unsigned long sti_mem_addr[256 / sizeof(unsigned long)];
/* do not add something below here ! */
};
/* internal generic STI struct */
struct sti_struct {
spinlock_t lock;
/* the following fields needs to be filled in by the word/byte routines */
int font_width;
int font_height;
/* char **mon_strings; */
int sti_mem_request;
u32 graphics_id[2];
struct sti_cooked_rom *rom;
unsigned long font_unpmv;
unsigned long block_move;
unsigned long init_graph;
unsigned long inq_conf;
/* all following fields are initialized by the generic routines */
int text_planes;
region_t regions[STI_REGION_MAX];
unsigned long regions_phys[STI_REGION_MAX];
struct sti_glob_cfg *glob_cfg; /* points into sti_all_data */
struct sti_cooked_font *font; /* ptr to selected font (cooked) */
struct pci_dev *pd;
/* PCI data structures (pg. 17ff from sti.pdf) */
u8 rm_entry[16]; /* pci region mapper array == pci config space offset */
/* pointer to the fb_info where this STI device is used */
struct fb_info *info;
/* pointer to all internal data */
struct sti_all_data *sti_data;
};
/* sticore interface functions */
struct sti_struct *sti_get_rom(unsigned int index); /* 0: default sti */
/* sticore main function to call STI firmware */
int sti_call(const struct sti_struct *sti, unsigned long func,
const void *flags, void *inptr, void *outptr,
struct sti_glob_cfg *glob_cfg);
/* functions to call the STI ROM directly */
void sti_putc(struct sti_struct *sti, int c, int y, int x);
void sti_set(struct sti_struct *sti, int src_y, int src_x,
int height, int width, u8 color);
void sti_clear(struct sti_struct *sti, int src_y, int src_x,
int height, int width, int c);
void sti_bmove(struct sti_struct *sti, int src_y, int src_x,
int dst_y, int dst_x, int height, int width);
#endif /* STICORE_H */
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