include/linux/svga.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_SVGA_H
   3 #define _LINUX_SVGA_H
   4
   5 #include <linux/pci.h>
   6 #include <video/vga.h>
   7
   8 /* Terminator for register set */
   9
  10 #define VGA_REGSET_END_VAL      0xFF
  11 #define VGA_REGSET_END          {VGA_REGSET_END_VAL, 0, 0}
  12
  13 struct vga_regset {
  14         u8 regnum;
  15         u8 lowbit;
  16         u8 highbit;
  17 };
  18
  19 /* ------------------------------------------------------------------------- */
  20
  21 #define SVGA_FORMAT_END_VAL     0xFFFF
  22 #define SVGA_FORMAT_END         {SVGA_FORMAT_END_VAL, {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, 0, 0, 0, 0, 0, 0}
  23
  24 struct svga_fb_format {
  25         /* var part */
  26         u32 bits_per_pixel;
  27         struct fb_bitfield red;
  28         struct fb_bitfield green;
  29         struct fb_bitfield blue;
  30         struct fb_bitfield transp;
  31         u32 nonstd;
  32         /* fix part */
  33         u32 type;
  34         u32 type_aux;
  35         u32 visual;
  36         u32 xpanstep;
  37         u32 xresstep;
  38 };
  39
  40 struct svga_timing_regs {
  41         const struct vga_regset *h_total_regs;
  42         const struct vga_regset *h_display_regs;
  43         const struct vga_regset *h_blank_start_regs;
  44         const struct vga_regset *h_blank_end_regs;
  45         const struct vga_regset *h_sync_start_regs;
  46         const struct vga_regset *h_sync_end_regs;
  47
  48         const struct vga_regset *v_total_regs;
  49         const struct vga_regset *v_display_regs;
  50         const struct vga_regset *v_blank_start_regs;
  51         const struct vga_regset *v_blank_end_regs;
  52         const struct vga_regset *v_sync_start_regs;
  53         const struct vga_regset *v_sync_end_regs;
  54 };
  55
  56 struct svga_pll {
  57         u16 m_min;
  58         u16 m_max;
  59         u16 n_min;
  60         u16 n_max;
  61         u16 r_min;
  62         u16 r_max;  /* r_max < 32 */
  63         u32 f_vco_min;
  64         u32 f_vco_max;
  65         u32 f_base;
  66 };
  67
  68
  69 /* Write a value to the attribute register */
  70
  71 static inline void svga_wattr(void __iomem *regbase, u8 index, u8 data)
  72 {
  73         vga_r(regbase, VGA_IS1_RC);
  74         vga_w(regbase, VGA_ATT_IW, index);
  75         vga_w(regbase, VGA_ATT_W, data);
  76 }
  77
  78 /* Write a value to a sequence register with a mask */
  79
  80 static inline void svga_wseq_mask(void __iomem *regbase, u8 index, u8 data, u8 mask)
  81 {
  82         vga_wseq(regbase, index, (data & mask) | (vga_rseq(regbase, index) & ~mask));
  83 }
  84
  85 /* Write a value to a CRT register with a mask */
  86
  87 static inline void svga_wcrt_mask(void __iomem *regbase, u8 index, u8 data, u8 mask)
  88 {
  89         vga_wcrt(regbase, index, (data & mask) | (vga_rcrt(regbase, index) & ~mask));
  90 }
  91
  92 static inline int svga_primary_device(struct pci_dev *dev)
  93 {
  94         u16 flags;
  95         pci_read_config_word(dev, PCI_COMMAND, &flags);
  96         return (flags & PCI_COMMAND_IO);
  97 }
  98
  99
 100 void svga_wcrt_multi(void __iomem *regbase, const struct vga_regset *regset, u32 value);
 101 void svga_wseq_multi(void __iomem *regbase, const struct vga_regset *regset, u32 value);
 102
 103 void svga_set_default_gfx_regs(void __iomem *regbase);
 104 void svga_set_default_atc_regs(void __iomem *regbase);
 105 void svga_set_default_seq_regs(void __iomem *regbase);
 106 void svga_set_default_crt_regs(void __iomem *regbase);
 107 void svga_set_textmode_vga_regs(void __iomem *regbase);
 108
 109 void svga_settile(struct fb_info *info, struct fb_tilemap *map);
 110 void svga_tilecopy(struct fb_info *info, struct fb_tilearea *area);
 111 void svga_tilefill(struct fb_info *info, struct fb_tilerect *rect);
 112 void svga_tileblit(struct fb_info *info, struct fb_tileblit *blit);
 113 void svga_tilecursor(void __iomem *regbase, struct fb_info *info, struct fb_tilecursor *cursor);
 114 int svga_get_tilemax(struct fb_info *info);
 115 void svga_get_caps(struct fb_info *info, struct fb_blit_caps *caps,
 116                    struct fb_var_screeninfo *var);
 117
 118 int svga_compute_pll(const struct svga_pll *pll, u32 f_wanted, u16 *m, u16 *n, u16 *r, int node);
 119 int svga_check_timings(const struct svga_timing_regs *tm, struct fb_var_screeninfo *var, int node);
 120 void svga_set_timings(void __iomem *regbase, const struct svga_timing_regs *tm, struct fb_var_screeninfo *var, u32 hmul, u32 hdiv, u32 vmul, u32 vdiv, u32 hborder, int node);
 121
 122 int svga_match_format(const struct svga_fb_format *frm, struct fb_var_screeninfo *var, struct fb_fix_screeninfo *fix);
 123
 124 #endif /* _LINUX_SVGA_H */
 125