--- /dev/null
+/* $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");
Code Review / kvmfornfv.git / blobdiff