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