block, cfq: restructure io_cq creation path for io_context interface cleanup
[linux-2.6.git] / drivers / video / g364fb.c
blob223896cc5f7d66713f98db315ada5ab364fc7d2b
1 /* $Id: g364fb.c,v 1.3 1998/08/28 22:43:00 tsbogend Exp $
3 * linux/drivers/video/g364fb.c -- Mips Magnum frame buffer device
5 * (C) 1998 Thomas Bogendoerfer
7 * This driver is based on tgafb.c
9 * Copyright (C) 1997 Geert Uytterhoeven
10 * Copyright (C) 1995 Jay Estabrook
12 * This file is subject to the terms and conditions of the GNU General Public
13 * License. See the file COPYING in the main directory of this archive for
14 * more details.
17 #include <linux/module.h>
18 #include <linux/console.h>
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/string.h>
22 #include <linux/mm.h>
23 #include <linux/vmalloc.h>
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/fb.h>
27 #include <linux/init.h>
28 #include <asm/io.h>
29 #include <asm/jazz.h>
31 /*
32 * Various defines for the G364
34 #define G364_MEM_BASE 0xe4400000
35 #define G364_PORT_BASE 0xe4000000
36 #define ID_REG 0xe4000000 /* Read only */
37 #define BOOT_REG 0xe4080000
38 #define TIMING_REG 0xe4080108 /* to 0x080170 - DON'T TOUCH! */
39 #define DISPLAY_REG 0xe4080118
40 #define VDISPLAY_REG 0xe4080150
41 #define MASK_REG 0xe4080200
42 #define CTLA_REG 0xe4080300
43 #define CURS_TOGGLE 0x800000
44 #define BIT_PER_PIX 0x700000 /* bits 22 to 20 of Control A */
45 #define DELAY_SAMPLE 0x080000
46 #define PORT_INTER 0x040000
47 #define PIX_PIPE_DEL 0x030000 /* bits 17 and 16 of Control A */
48 #define PIX_PIPE_DEL2 0x008000 /* same as above - don't ask me why */
49 #define TR_CYCLE_TOG 0x004000
50 #define VRAM_ADR_INC 0x003000 /* bits 13 and 12 of Control A */
51 #define BLANK_OFF 0x000800
52 #define FORCE_BLANK 0x000400
53 #define BLK_FUN_SWTCH 0x000200
54 #define BLANK_IO 0x000100
55 #define BLANK_LEVEL 0x000080
56 #define A_VID_FORM 0x000040
57 #define D_SYNC_FORM 0x000020
58 #define FRAME_FLY_PAT 0x000010
59 #define OP_MODE 0x000008
60 #define INTL_STAND 0x000004
61 #define SCRN_FORM 0x000002
62 #define ENABLE_VTG 0x000001
63 #define TOP_REG 0xe4080400
64 #define CURS_PAL_REG 0xe4080508 /* to 0x080518 */
65 #define CHKSUM_REG 0xe4080600 /* to 0x080610 - unused */
66 #define CURS_POS_REG 0xe4080638
67 #define CLR_PAL_REG 0xe4080800 /* to 0x080ff8 */
68 #define CURS_PAT_REG 0xe4081000 /* to 0x081ff8 */
69 #define MON_ID_REG 0xe4100000 /* unused */
70 #define RESET_REG 0xe4180000 /* Write only */
72 static struct fb_info fb_info;
74 static struct fb_fix_screeninfo fb_fix __initdata = {
75 .id = "G364 8plane",
76 .smem_start = 0x40000000, /* physical address */
77 .type = FB_TYPE_PACKED_PIXELS,
78 .visual = FB_VISUAL_PSEUDOCOLOR,
79 .ypanstep = 1,
80 .accel = FB_ACCEL_NONE,
83 static struct fb_var_screeninfo fb_var __initdata = {
84 .bits_per_pixel = 8,
85 .red = { 0, 8, 0 },
86 .green = { 0, 8, 0 },
87 .blue = { 0, 8, 0 },
88 .activate = FB_ACTIVATE_NOW,
89 .height = -1,
90 .width = -1,
91 .pixclock = 39722,
92 .left_margin = 40,
93 .right_margin = 24,
94 .upper_margin = 32,
95 .lower_margin = 11,
96 .hsync_len = 96,
97 .vsync_len = 2,
98 .vmode = FB_VMODE_NONINTERLACED,
102 * Interface used by the world
104 int g364fb_init(void);
106 static int g364fb_pan_display(struct fb_var_screeninfo *var,
107 struct fb_info *info);
108 static int g364fb_setcolreg(u_int regno, u_int red, u_int green,
109 u_int blue, u_int transp,
110 struct fb_info *info);
111 static int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor);
112 static int g364fb_blank(int blank, struct fb_info *info);
114 static struct fb_ops g364fb_ops = {
115 .owner = THIS_MODULE,
116 .fb_setcolreg = g364fb_setcolreg,
117 .fb_pan_display = g364fb_pan_display,
118 .fb_blank = g364fb_blank,
119 .fb_fillrect = cfb_fillrect,
120 .fb_copyarea = cfb_copyarea,
121 .fb_imageblit = cfb_imageblit,
122 .fb_cursor = g364fb_cursor,
125 int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
128 switch (cursor->enable) {
129 case CM_ERASE:
130 *(unsigned int *) CTLA_REG |= CURS_TOGGLE;
131 break;
133 case CM_MOVE:
134 case CM_DRAW:
135 *(unsigned int *) CTLA_REG &= ~CURS_TOGGLE;
136 *(unsigned int *) CURS_POS_REG =
137 ((x * fontwidth(p)) << 12) | ((y * fontheight(p)) -
138 info->var.yoffset);
139 break;
141 return 0;
145 * Pan or Wrap the Display
147 * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
149 static int g364fb_pan_display(struct fb_var_screeninfo *var,
150 struct fb_info *info)
152 if (var->xoffset ||
153 var->yoffset + info->var.yres > info->var.yres_virtual)
154 return -EINVAL;
156 *(unsigned int *) TOP_REG = var->yoffset * info->var.xres;
157 return 0;
161 * Blank the display.
163 static int g364fb_blank(int blank, struct fb_info *info)
165 if (blank)
166 *(unsigned int *) CTLA_REG |= FORCE_BLANK;
167 else
168 *(unsigned int *) CTLA_REG &= ~FORCE_BLANK;
169 return 0;
173 * Set a single color register. Return != 0 for invalid regno.
175 static int g364fb_setcolreg(u_int regno, u_int red, u_int green,
176 u_int blue, u_int transp, struct fb_info *info)
178 volatile unsigned int *ptr = (volatile unsigned int *) CLR_PAL_REG;
180 if (regno > 255)
181 return 1;
183 red >>= 8;
184 green >>= 8;
185 blue >>= 8;
187 ptr[regno << 1] = (red << 16) | (green << 8) | blue;
189 return 0;
193 * Initialisation
195 int __init g364fb_init(void)
197 volatile unsigned int *pal_ptr =
198 (volatile unsigned int *) CLR_PAL_REG;
199 volatile unsigned int *curs_pal_ptr =
200 (volatile unsigned int *) CURS_PAL_REG;
201 int mem, i, j;
203 if (fb_get_options("g364fb", NULL))
204 return -ENODEV;
206 /* TBD: G364 detection */
208 /* get the resolution set by ARC console */
209 *(volatile unsigned int *) CTLA_REG &= ~ENABLE_VTG;
210 fb_var.xres =
211 (*((volatile unsigned int *) DISPLAY_REG) & 0x00ffffff) * 4;
212 fb_var.yres =
213 (*((volatile unsigned int *) VDISPLAY_REG) & 0x00ffffff) / 2;
214 *(volatile unsigned int *) CTLA_REG |= ENABLE_VTG;
216 /* setup cursor */
217 curs_pal_ptr[0] |= 0x00ffffff;
218 curs_pal_ptr[2] |= 0x00ffffff;
219 curs_pal_ptr[4] |= 0x00ffffff;
222 * first set the whole cursor to transparent
224 for (i = 0; i < 512; i++)
225 *(unsigned short *) (CURS_PAT_REG + i * 8) = 0;
228 * switch the last two lines to cursor palette 3
229 * we assume here, that FONTSIZE_X is 8
231 *(unsigned short *) (CURS_PAT_REG + 14 * 64) = 0xffff;
232 *(unsigned short *) (CURS_PAT_REG + 15 * 64) = 0xffff;
233 fb_var.xres_virtual = fbvar.xres;
234 fb_fix.line_length = (xres / 8) * fb_var.bits_per_pixel;
235 fb_fix.smem_start = 0x40000000; /* physical address */
236 /* get size of video memory; this is special for the JAZZ hardware */
237 mem = (r4030_read_reg32(JAZZ_R4030_CONFIG) >> 8) & 3;
238 fb_fix.smem_len = (1 << (mem * 2)) * 512 * 1024;
239 fb_var.yres_virtual = fb_fix.smem_len / fb_var.xres;
241 fb_info.fbops = &g364fb_ops;
242 fb_info.screen_base = (char *) G364_MEM_BASE; /* virtual kernel address */
243 fb_info.var = fb_var;
244 fb_info.fix = fb_fix;
245 fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
247 fb_alloc_cmap(&fb_info.cmap, 255, 0);
249 if (register_framebuffer(&fb_info) < 0)
250 return -EINVAL;
251 return 0;
254 module_init(g364fb_init);
255 MODULE_LICENSE("GPL");