LXR linux/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
  13struct 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
  24struct 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
  40struct 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
  56struct 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
  71static 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
  80static 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
  87static 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
  92static 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
 100void svga_wcrt_multi(void __iomem *regbase, const struct vga_regset *regset, u32 value);
 101void svga_wseq_multi(void __iomem *regbase, const struct vga_regset *regset, u32 value);
 102
 103void svga_set_default_gfx_regs(void __iomem *regbase);
 104void svga_set_default_atc_regs(void __iomem *regbase);
 105void svga_set_default_seq_regs(void __iomem *regbase);
 106void svga_set_default_crt_regs(void __iomem *regbase);
 107void svga_set_textmode_vga_regs(void __iomem *regbase);
 108
 109void svga_settile(struct fb_info *info, struct fb_tilemap *map);
 110void svga_tilecopy(struct fb_info *info, struct fb_tilearea *area);
 111void svga_tilefill(struct fb_info *info, struct fb_tilerect *rect);
 112void svga_tileblit(struct fb_info *info, struct fb_tileblit *blit);
 113void svga_tilecursor(void __iomem *regbase, struct fb_info *info, struct fb_tilecursor *cursor);
 114int svga_get_tilemax(struct fb_info *info);
 115void svga_get_caps(struct fb_info *info, struct fb_blit_caps *caps,
 116                   struct fb_var_screeninfo *var);
 117
 118int svga_compute_pll(const struct svga_pll *pll, u32 f_wanted, u16 *m, u16 *n, u16 *r, int node);
 119int svga_check_timings(const struct svga_timing_regs *tm, struct fb_var_screeninfo *var, int node);
 120void 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
 122int 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
 126