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Diffstat (limited to '')
| -rw-r--r-- | drivers/video/fbdev/g364fb.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/drivers/video/fbdev/g364fb.c b/drivers/video/fbdev/g364fb.c new file mode 100644 index 000000000..223896cc5 --- /dev/null +++ b/drivers/video/fbdev/g364fb.c @@ -0,0 +1,255 @@ +/* $Id: g364fb.c,v 1.3 1998/08/28 22:43:00 tsbogend Exp $ + * + * linux/drivers/video/g364fb.c -- Mips Magnum frame buffer device + * + * (C) 1998 Thomas Bogendoerfer + * + * This driver is based on tgafb.c + * + * Copyright (C) 1997 Geert Uytterhoeven + * Copyright (C) 1995 Jay Estabrook + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive for + * more details. + */ + +#include <linux/module.h> +#include <linux/console.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/vmalloc.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/fb.h> +#include <linux/init.h> +#include <asm/io.h> +#include <asm/jazz.h> + +/* + * Various defines for the G364 + */ +#define G364_MEM_BASE 0xe4400000 +#define G364_PORT_BASE 0xe4000000 +#define ID_REG 0xe4000000 /* Read only */ +#define BOOT_REG 0xe4080000 +#define TIMING_REG 0xe4080108 /* to 0x080170 - DON'T TOUCH! */ +#define DISPLAY_REG 0xe4080118 +#define VDISPLAY_REG 0xe4080150 +#define MASK_REG 0xe4080200 +#define CTLA_REG 0xe4080300 +#define CURS_TOGGLE 0x800000 +#define BIT_PER_PIX 0x700000 /* bits 22 to 20 of Control A */ +#define DELAY_SAMPLE 0x080000 +#define PORT_INTER 0x040000 +#define PIX_PIPE_DEL 0x030000 /* bits 17 and 16 of Control A */ +#define PIX_PIPE_DEL2 0x008000 /* same as above - don't ask me why */ +#define TR_CYCLE_TOG 0x004000 +#define VRAM_ADR_INC 0x003000 /* bits 13 and 12 of Control A */ +#define BLANK_OFF 0x000800 +#define FORCE_BLANK 0x000400 +#define BLK_FUN_SWTCH 0x000200 +#define BLANK_IO 0x000100 +#define BLANK_LEVEL 0x000080 +#define A_VID_FORM 0x000040 +#define D_SYNC_FORM 0x000020 +#define FRAME_FLY_PAT 0x000010 +#define OP_MODE 0x000008 +#define INTL_STAND 0x000004 +#define SCRN_FORM 0x000002 +#define ENABLE_VTG 0x000001 +#define TOP_REG 0xe4080400 +#define CURS_PAL_REG 0xe4080508 /* to 0x080518 */ +#define CHKSUM_REG 0xe4080600 /* to 0x080610 - unused */ +#define CURS_POS_REG 0xe4080638 +#define CLR_PAL_REG 0xe4080800 /* to 0x080ff8 */ +#define CURS_PAT_REG 0xe4081000 /* to 0x081ff8 */ +#define MON_ID_REG 0xe4100000 /* unused */ +#define RESET_REG 0xe4180000 /* Write only */ + +static struct fb_info fb_info; + +static struct fb_fix_screeninfo fb_fix __initdata = { + .id = "G364 8plane", + .smem_start = 0x40000000, /* physical address */ + .type = FB_TYPE_PACKED_PIXELS, + .visual = FB_VISUAL_PSEUDOCOLOR, + .ypanstep = 1, + .accel = FB_ACCEL_NONE, +}; + +static struct fb_var_screeninfo fb_var __initdata = { + .bits_per_pixel = 8, + .red = { 0, 8, 0 }, + .green = { 0, 8, 0 }, + .blue = { 0, 8, 0 }, + .activate = FB_ACTIVATE_NOW, + .height = -1, + .width = -1, + .pixclock = 39722, + .left_margin = 40, + .right_margin = 24, + .upper_margin = 32, + .lower_margin = 11, + .hsync_len = 96, + .vsync_len = 2, + .vmode = FB_VMODE_NONINTERLACED, +}; + +/* + * Interface used by the world + */ +int g364fb_init(void); + +static int g364fb_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info); +static int g364fb_setcolreg(u_int regno, u_int red, u_int green, + u_int blue, u_int transp, + struct fb_info *info); +static int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor); +static int g364fb_blank(int blank, struct fb_info *info); + +static struct fb_ops g364fb_ops = { + .owner = THIS_MODULE, + .fb_setcolreg = g364fb_setcolreg, + .fb_pan_display = g364fb_pan_display, + .fb_blank = g364fb_blank, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .fb_imageblit = cfb_imageblit, + .fb_cursor = g364fb_cursor, +}; + +int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor) +{ + + switch (cursor->enable) { + case CM_ERASE: + *(unsigned int *) CTLA_REG |= CURS_TOGGLE; + break; + + case CM_MOVE: + case CM_DRAW: + *(unsigned int *) CTLA_REG &= ~CURS_TOGGLE; + *(unsigned int *) CURS_POS_REG = + ((x * fontwidth(p)) << 12) | ((y * fontheight(p)) - + info->var.yoffset); + break; + } + return 0; +} + +/* + * Pan or Wrap the Display + * + * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag + */ +static int g364fb_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info) +{ + if (var->xoffset || + var->yoffset + info->var.yres > info->var.yres_virtual) + return -EINVAL; + + *(unsigned int *) TOP_REG = var->yoffset * info->var.xres; + return 0; +} + +/* + * Blank the display. + */ +static int g364fb_blank(int blank, struct fb_info *info) +{ + if (blank) + *(unsigned int *) CTLA_REG |= FORCE_BLANK; + else + *(unsigned int *) CTLA_REG &= ~FORCE_BLANK; + return 0; +} + +/* + * Set a single color register. Return != 0 for invalid regno. + */ +static int g364fb_setcolreg(u_int regno, u_int red, u_int green, + u_int blue, u_int transp, struct fb_info *info) +{ + volatile unsigned int *ptr = (volatile unsigned int *) CLR_PAL_REG; + + if (regno > 255) + return 1; + + red >>= 8; + green >>= 8; + blue >>= 8; + + ptr[regno << 1] = (red << 16) | (green << 8) | blue; + + return 0; +} + +/* + * Initialisation + */ +int __init g364fb_init(void) +{ + volatile unsigned int *pal_ptr = + (volatile unsigned int *) CLR_PAL_REG; + volatile unsigned int *curs_pal_ptr = + (volatile unsigned int *) CURS_PAL_REG; + int mem, i, j; + + if (fb_get_options("g364fb", NULL)) + return -ENODEV; + + /* TBD: G364 detection */ + + /* get the resolution set by ARC console */ + *(volatile unsigned int *) CTLA_REG &= ~ENABLE_VTG; + fb_var.xres = + (*((volatile unsigned int *) DISPLAY_REG) & 0x00ffffff) * 4; + fb_var.yres = + (*((volatile unsigned int *) VDISPLAY_REG) & 0x00ffffff) / 2; + *(volatile unsigned int *) CTLA_REG |= ENABLE_VTG; + + /* setup cursor */ + curs_pal_ptr[0] |= 0x00ffffff; + curs_pal_ptr[2] |= 0x00ffffff; + curs_pal_ptr[4] |= 0x00ffffff; + + /* + * first set the whole cursor to transparent + */ + for (i = 0; i < 512; i++) + *(unsigned short *) (CURS_PAT_REG + i * 8) = 0; + + /* + * switch the last two lines to cursor palette 3 + * we assume here, that FONTSIZE_X is 8 + */ + *(unsigned short *) (CURS_PAT_REG + 14 * 64) = 0xffff; + *(unsigned short *) (CURS_PAT_REG + 15 * 64) = 0xffff; + fb_var.xres_virtual = fbvar.xres; + fb_fix.line_length = (xres / 8) * fb_var.bits_per_pixel; + fb_fix.smem_start = 0x40000000; /* physical address */ + /* get size of video memory; this is special for the JAZZ hardware */ + mem = (r4030_read_reg32(JAZZ_R4030_CONFIG) >> 8) & 3; + fb_fix.smem_len = (1 << (mem * 2)) * 512 * 1024; + fb_var.yres_virtual = fb_fix.smem_len / fb_var.xres; + + fb_info.fbops = &g364fb_ops; + fb_info.screen_base = (char *) G364_MEM_BASE; /* virtual kernel address */ + fb_info.var = fb_var; + fb_info.fix = fb_fix; + fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN; + + fb_alloc_cmap(&fb_info.cmap, 255, 0); + + if (register_framebuffer(&fb_info) < 0) + return -EINVAL; + return 0; +} + +module_init(g364fb_init); +MODULE_LICENSE("GPL"); |