File: /usr/src/linux/drivers/video/p9100fb.c
1 /* $id: p9100fb.c,v 1.4 1999/08/18 10:55:01 shadow Exp $
2 * p9100fb.c: P9100 frame buffer driver
3 *
4 * Copyright 1999 Derrick J Brashear (shadow@dementia.org)
5 */
6
7 #include <linux/module.h>
8 #include <linux/sched.h>
9 #include <linux/kernel.h>
10 #include <linux/errno.h>
11 #include <linux/string.h>
12 #include <linux/mm.h>
13 #include <linux/tty.h>
14 #include <linux/slab.h>
15 #include <linux/vmalloc.h>
16 #include <linux/delay.h>
17 #include <linux/interrupt.h>
18 #include <linux/fb.h>
19 #include <linux/init.h>
20 #include <linux/selection.h>
21
22 #include <video/sbusfb.h>
23 #include <asm/io.h>
24
25 #include <video/fbcon-cfb8.h>
26
27 #include "p9100.h"
28
29 static struct sbus_mmap_map p9100_mmap_map[] = {
30 #if 0 /* For now, play we're a dumb color fb */
31 { P9100_CTL_OFF, 0x38000000, 0x2000 },
32 { P9100_CMD_OFF, 0x38002000, 0x2000 },
33 { P9100_FB_OFF, 0x38800000, 0x200000 },
34 { CG3_MMAP_OFFSET, 0x38800000, SBUS_MMAP_FBSIZE(1) },
35 #else
36 { CG3_MMAP_OFFSET, 0x0, SBUS_MMAP_FBSIZE(1) },
37 #endif
38 { 0, 0, 0 }
39 };
40
41 #define _READCTL(member, out) \
42 { \
43 struct p9100_ctrl *actual; \
44 actual = (struct p9100_ctrl *)fb->s.p9100.ctrl; \
45 out = sbus_readl(&actual-> ## member ); \
46 }
47
48 #define READCTL(member, out) \
49 { \
50 struct p9100_ctrl *enab, *actual; \
51 actual = (struct p9100_ctrl *)fb->s.p9100.ctrl; \
52 enab = (struct p9100_ctrl *)fb->s.p9100.fbmem; \
53 out = sbus_readl(&enab-> ## member ); \
54 out = sbus_readl(&actual-> ## member ); \
55 }
56
57 #define WRITECTL(member, val) \
58 { \
59 u32 __writetmp; \
60 struct p9100_ctrl *enab, *actual; \
61 actual = (struct p9100_ctrl *)fb->s.p9100.ctrl; \
62 enab = (struct p9100_ctrl *)fb->s.p9100.fbmem; \
63 __writetmp = sbus_readl(&enab-> ## member ); \
64 sbus_writel(val, &actual-> ## member ); \
65 }
66
67 static void p9100_loadcmap (struct fb_info_sbusfb *fb, struct display *p, int index, int count)
68 {
69 unsigned long flags;
70 u32 tmp;
71 int i;
72
73 spin_lock_irqsave(&fb->lock, flags);
74
75 _READCTL(pwrup_cfg, tmp);
76 WRITECTL(ramdac_cmap_wridx, (index << 16));
77
78 for (i = index; count--; i++){
79 _READCTL(pwrup_cfg, tmp);
80 WRITECTL(ramdac_palette_data, (fb->color_map CM(i,0) << 16));
81 _READCTL(pwrup_cfg, tmp);
82 WRITECTL(ramdac_palette_data, (fb->color_map CM(i,1) << 16));
83 _READCTL(pwrup_cfg, tmp);
84 WRITECTL(ramdac_palette_data, (fb->color_map CM(i,2) << 16));
85 }
86
87 spin_unlock_irqrestore(&fb->lock, flags);
88 }
89
90 static void p9100_blank (struct fb_info_sbusfb *fb)
91 {
92 unsigned long flags;
93 u32 val;
94
95 spin_lock_irqsave(&fb->lock, flags);
96 READCTL(vid_screenpaint_timectl1, val);
97 val &= ~ SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
98 WRITECTL(vid_screenpaint_timectl1, val);
99 spin_unlock_irqrestore(&fb->lock, flags);
100 }
101
102 static void p9100_unblank (struct fb_info_sbusfb *fb)
103 {
104 unsigned long flags;
105 u32 val;
106
107 spin_lock_irqsave(&fb->lock, flags);
108 READCTL(vid_screenpaint_timectl1, val);
109 val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
110 WRITECTL(vid_screenpaint_timectl1, val);
111 spin_unlock_irqrestore(&fb->lock, flags);
112 }
113
114 static void p9100_margins (struct fb_info_sbusfb *fb, struct display *p, int x_margin, int y_margin)
115 {
116 p->screen_base += (y_margin - fb->y_margin) * p->line_length +
117 (x_margin - fb->x_margin);
118 }
119
120 static char idstring[60] __initdata = { 0 };
121
122 char * __init p9100fb_init(struct fb_info_sbusfb *fb)
123 {
124 struct fb_fix_screeninfo *fix = &fb->fix;
125 struct display *disp = &fb->disp;
126 struct fbtype *type = &fb->type;
127 struct sbus_dev *sdev = fb->sbdp;
128 unsigned long phys = sdev->reg_addrs[2].phys_addr;
129 int tmp;
130
131 #ifndef FBCON_HAS_CFB8
132 return NULL;
133 #endif
134
135 /* Control regs: fb->sbdp->reg_addrs[0].phys_addr
136 * Command regs: fb->sbdp->reg_addrs[1].phys_addr
137 * Frame buffer: fb->sbdp->reg_addrs[2].phys_addr
138 */
139
140 if (!fb->s.p9100.ctrl) {
141 fb->s.p9100.ctrl = (struct p9100_ctrl *)
142 sbus_ioremap(&sdev->resource[0], 0,
143 sdev->reg_addrs[0].reg_size, "p9100 ctrl");
144 }
145
146 strcpy(fb->info.modename, "p9100");
147 strcpy(fix->id, "p9100");
148 fix->accel = FB_ACCEL_SUN_CGTHREE;
149 fix->line_length = fb->var.xres_virtual;
150
151 disp->scrollmode = SCROLL_YREDRAW;
152 if (!disp->screen_base)
153 disp->screen_base = (char *)
154 sbus_ioremap(&sdev->resource[2], 0,
155 type->fb_size, "p9100 ram");
156 fb->s.p9100.fbmem = (volatile u32 *)disp->screen_base;
157 disp->screen_base += fix->line_length * fb->y_margin + fb->x_margin;
158
159 READCTL(sys_config, tmp);
160 switch ((tmp >> SYS_CONFIG_PIXELSIZE_SHIFT) & 7) {
161 case 7:
162 type->fb_depth = 24;
163 break;
164 case 5:
165 type->fb_depth = 32;
166 break;
167 case 3:
168 type->fb_depth = 16;
169 break;
170 case 2:
171 type->fb_depth = 8;
172 break;
173 default:
174 printk("p9100: screen depth unknown: 0x%x", tmp);
175 return NULL;
176 }
177
178 fb->dispsw = fbcon_cfb8;
179
180 fb->margins = p9100_margins;
181 fb->loadcmap = p9100_loadcmap;
182 fb->blank = p9100_blank;
183 fb->unblank = p9100_unblank;
184
185 fb->physbase = phys;
186 fb->mmap_map = p9100_mmap_map;
187
188 sprintf(idstring, "%s at 0x%x", "p9100",
189 (unsigned int)disp->screen_base);
190
191 return idstring;
192 }
193
194