1 files changed, 258 insertions, 0 deletions

diff --git a/drivers/video/g364fb.c b/drivers/video/g364fb.c
new file mode 100644
index 000000000000..605d1a132020
--- /dev/null
+++ b/drivers/video/g364fb.c
@@ -0,0 +1,258 @@
+/* $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/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/pci.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 + var->yres > var->yres_virtual)
+                return -EINVAL;
+
+        *(unsigned int *) TOP_REG = var->yoffset * 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");