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8a48ac3393
Now that the fbops member of struct fb_info is const, we can start making the ops const as well. This does not cover all drivers; some actually modify the fbops struct, for example to adjust for different configurations, and others do more involved things that I'd rather not touch in practically obsolete drivers. Mostly this is the low hanging fruit where we can add "const" and be done with it. v3: - un-constify atyfb, mb862xx, nvidia and uvesabf (0day) v2: - fix typo (Christophe de Dinechin) - use "static const" instead of "const static" in mx3fb.c - also constify smscufx.c Cc: linux-fbdev@vger.kernel.org Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/ce67f14435f3af498f2e8bf35ce4be11f7504132.1575390740.git.jani.nikula@intel.com
256 lines
6.8 KiB
C
256 lines
6.8 KiB
C
/* $Id: g364fb.c,v 1.3 1998/08/28 22:43:00 tsbogend Exp $
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*
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* linux/drivers/video/g364fb.c -- Mips Magnum frame buffer device
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*
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* (C) 1998 Thomas Bogendoerfer
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*
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* This driver is based on tgafb.c
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*
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* Copyright (C) 1997 Geert Uytterhoeven
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* Copyright (C) 1995 Jay Estabrook
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/module.h>
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#include <linux/console.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/vmalloc.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <asm/io.h>
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#include <asm/jazz.h>
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/*
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* Various defines for the G364
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*/
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#define G364_MEM_BASE 0xe4400000
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#define G364_PORT_BASE 0xe4000000
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#define ID_REG 0xe4000000 /* Read only */
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#define BOOT_REG 0xe4080000
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#define TIMING_REG 0xe4080108 /* to 0x080170 - DON'T TOUCH! */
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#define DISPLAY_REG 0xe4080118
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#define VDISPLAY_REG 0xe4080150
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#define MASK_REG 0xe4080200
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#define CTLA_REG 0xe4080300
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#define CURS_TOGGLE 0x800000
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#define BIT_PER_PIX 0x700000 /* bits 22 to 20 of Control A */
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#define DELAY_SAMPLE 0x080000
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#define PORT_INTER 0x040000
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#define PIX_PIPE_DEL 0x030000 /* bits 17 and 16 of Control A */
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#define PIX_PIPE_DEL2 0x008000 /* same as above - don't ask me why */
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#define TR_CYCLE_TOG 0x004000
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#define VRAM_ADR_INC 0x003000 /* bits 13 and 12 of Control A */
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#define BLANK_OFF 0x000800
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#define FORCE_BLANK 0x000400
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#define BLK_FUN_SWTCH 0x000200
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#define BLANK_IO 0x000100
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#define BLANK_LEVEL 0x000080
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#define A_VID_FORM 0x000040
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#define D_SYNC_FORM 0x000020
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#define FRAME_FLY_PAT 0x000010
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#define OP_MODE 0x000008
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#define INTL_STAND 0x000004
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#define SCRN_FORM 0x000002
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#define ENABLE_VTG 0x000001
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#define TOP_REG 0xe4080400
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#define CURS_PAL_REG 0xe4080508 /* to 0x080518 */
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#define CHKSUM_REG 0xe4080600 /* to 0x080610 - unused */
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#define CURS_POS_REG 0xe4080638
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#define CLR_PAL_REG 0xe4080800 /* to 0x080ff8 */
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#define CURS_PAT_REG 0xe4081000 /* to 0x081ff8 */
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#define MON_ID_REG 0xe4100000 /* unused */
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#define RESET_REG 0xe4180000 /* Write only */
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static struct fb_info fb_info;
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static struct fb_fix_screeninfo fb_fix __initdata = {
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.id = "G364 8plane",
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.smem_start = 0x40000000, /* physical address */
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.type = FB_TYPE_PACKED_PIXELS,
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.visual = FB_VISUAL_PSEUDOCOLOR,
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.ypanstep = 1,
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.accel = FB_ACCEL_NONE,
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};
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static struct fb_var_screeninfo fb_var __initdata = {
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.bits_per_pixel = 8,
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.red = { 0, 8, 0 },
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.green = { 0, 8, 0 },
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.blue = { 0, 8, 0 },
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.activate = FB_ACTIVATE_NOW,
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.height = -1,
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.width = -1,
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.pixclock = 39722,
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.left_margin = 40,
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.right_margin = 24,
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.upper_margin = 32,
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.lower_margin = 11,
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.hsync_len = 96,
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.vsync_len = 2,
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.vmode = FB_VMODE_NONINTERLACED,
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};
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/*
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* Interface used by the world
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*/
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int g364fb_init(void);
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static int g364fb_pan_display(struct fb_var_screeninfo *var,
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struct fb_info *info);
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static int g364fb_setcolreg(u_int regno, u_int red, u_int green,
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u_int blue, u_int transp,
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struct fb_info *info);
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static int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor);
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static int g364fb_blank(int blank, struct fb_info *info);
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static const struct fb_ops g364fb_ops = {
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.owner = THIS_MODULE,
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.fb_setcolreg = g364fb_setcolreg,
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.fb_pan_display = g364fb_pan_display,
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.fb_blank = g364fb_blank,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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.fb_cursor = g364fb_cursor,
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};
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int g364fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
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{
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switch (cursor->enable) {
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case CM_ERASE:
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*(unsigned int *) CTLA_REG |= CURS_TOGGLE;
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break;
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case CM_MOVE:
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case CM_DRAW:
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*(unsigned int *) CTLA_REG &= ~CURS_TOGGLE;
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*(unsigned int *) CURS_POS_REG =
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((x * fontwidth(p)) << 12) | ((y * fontheight(p)) -
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info->var.yoffset);
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break;
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}
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return 0;
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}
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/*
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* Pan or Wrap the Display
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*
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* This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
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*/
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static int g364fb_pan_display(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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if (var->xoffset ||
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var->yoffset + info->var.yres > info->var.yres_virtual)
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return -EINVAL;
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*(unsigned int *) TOP_REG = var->yoffset * info->var.xres;
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return 0;
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}
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/*
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* Blank the display.
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*/
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static int g364fb_blank(int blank, struct fb_info *info)
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{
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if (blank)
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*(unsigned int *) CTLA_REG |= FORCE_BLANK;
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else
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*(unsigned int *) CTLA_REG &= ~FORCE_BLANK;
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return 0;
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}
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/*
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* Set a single color register. Return != 0 for invalid regno.
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*/
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static int g364fb_setcolreg(u_int regno, u_int red, u_int green,
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u_int blue, u_int transp, struct fb_info *info)
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{
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volatile unsigned int *ptr = (volatile unsigned int *) CLR_PAL_REG;
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if (regno > 255)
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return 1;
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red >>= 8;
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green >>= 8;
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blue >>= 8;
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ptr[regno << 1] = (red << 16) | (green << 8) | blue;
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return 0;
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}
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/*
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* Initialisation
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*/
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int __init g364fb_init(void)
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{
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volatile unsigned int *pal_ptr =
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(volatile unsigned int *) CLR_PAL_REG;
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volatile unsigned int *curs_pal_ptr =
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(volatile unsigned int *) CURS_PAL_REG;
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int mem, i, j;
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if (fb_get_options("g364fb", NULL))
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return -ENODEV;
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/* TBD: G364 detection */
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/* get the resolution set by ARC console */
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*(volatile unsigned int *) CTLA_REG &= ~ENABLE_VTG;
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fb_var.xres =
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(*((volatile unsigned int *) DISPLAY_REG) & 0x00ffffff) * 4;
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fb_var.yres =
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(*((volatile unsigned int *) VDISPLAY_REG) & 0x00ffffff) / 2;
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*(volatile unsigned int *) CTLA_REG |= ENABLE_VTG;
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/* setup cursor */
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curs_pal_ptr[0] |= 0x00ffffff;
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curs_pal_ptr[2] |= 0x00ffffff;
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curs_pal_ptr[4] |= 0x00ffffff;
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/*
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* first set the whole cursor to transparent
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*/
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for (i = 0; i < 512; i++)
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*(unsigned short *) (CURS_PAT_REG + i * 8) = 0;
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/*
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* switch the last two lines to cursor palette 3
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* we assume here, that FONTSIZE_X is 8
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*/
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*(unsigned short *) (CURS_PAT_REG + 14 * 64) = 0xffff;
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*(unsigned short *) (CURS_PAT_REG + 15 * 64) = 0xffff;
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fb_var.xres_virtual = fbvar.xres;
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fb_fix.line_length = (xres / 8) * fb_var.bits_per_pixel;
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fb_fix.smem_start = 0x40000000; /* physical address */
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/* get size of video memory; this is special for the JAZZ hardware */
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mem = (r4030_read_reg32(JAZZ_R4030_CONFIG) >> 8) & 3;
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fb_fix.smem_len = (1 << (mem * 2)) * 512 * 1024;
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fb_var.yres_virtual = fb_fix.smem_len / fb_var.xres;
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fb_info.fbops = &g364fb_ops;
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fb_info.screen_base = (char *) G364_MEM_BASE; /* virtual kernel address */
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fb_info.var = fb_var;
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fb_info.fix = fb_fix;
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fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
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fb_alloc_cmap(&fb_info.cmap, 255, 0);
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if (register_framebuffer(&fb_info) < 0)
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return -EINVAL;
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return 0;
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}
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module_init(g364fb_init);
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MODULE_LICENSE("GPL");
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