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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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1452 lines
36 KiB
C
1452 lines
36 KiB
C
/*
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* linux/drivers/video/acornfb.c
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*
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* Copyright (C) 1998-2001 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Frame buffer code for Acorn platforms
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*
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* NOTE: Most of the modes with X!=640 will disappear shortly.
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* NOTE: Startup setting of HS & VS polarity not supported.
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* (do we need to support it if we're coming up in 640x480?)
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*
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* FIXME: (things broken by the "new improved" FBCON API)
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* - Blanking 8bpp displays with VIDC
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*/
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#include <linux/module.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/ctype.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/init.h>
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#include <linux/fb.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#include <asm/mach-types.h>
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#include <asm/pgtable.h>
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#include "acornfb.h"
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/*
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* VIDC machines can't do 16 or 32BPP modes.
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*/
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#ifdef HAS_VIDC
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#undef FBCON_HAS_CFB16
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#undef FBCON_HAS_CFB32
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#endif
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/*
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* Default resolution.
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* NOTE that it has to be supported in the table towards
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* the end of this file.
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*/
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#define DEFAULT_XRES 640
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#define DEFAULT_YRES 480
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#define DEFAULT_BPP 4
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/*
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* define this to debug the video mode selection
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*/
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#undef DEBUG_MODE_SELECTION
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/*
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* Translation from RISC OS monitor types to actual
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* HSYNC and VSYNC frequency ranges. These are
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* probably not right, but they're the best info I
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* have. Allow 1% either way on the nominal for TVs.
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*/
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#define NR_MONTYPES 6
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static struct fb_monspecs monspecs[NR_MONTYPES] __initdata = {
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{ /* TV */
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.hfmin = 15469,
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.hfmax = 15781,
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.vfmin = 49,
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.vfmax = 51,
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}, { /* Multi Freq */
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.hfmin = 0,
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.hfmax = 99999,
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.vfmin = 0,
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.vfmax = 199,
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}, { /* Hi-res mono */
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.hfmin = 58608,
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.hfmax = 58608,
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.vfmin = 64,
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.vfmax = 64,
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}, { /* VGA */
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.hfmin = 30000,
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.hfmax = 70000,
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.vfmin = 60,
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.vfmax = 60,
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}, { /* SVGA */
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.hfmin = 30000,
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.hfmax = 70000,
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.vfmin = 56,
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.vfmax = 75,
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}, {
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.hfmin = 30000,
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.hfmax = 70000,
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.vfmin = 60,
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.vfmax = 60,
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}
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};
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static struct fb_info fb_info;
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static struct acornfb_par current_par;
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static struct vidc_timing current_vidc;
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extern unsigned int vram_size; /* set by setup.c */
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#ifdef HAS_VIDC
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#define MAX_SIZE 480*1024
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/* CTL VIDC Actual
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* 24.000 0 8.000
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* 25.175 0 8.392
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* 36.000 0 12.000
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* 24.000 1 12.000
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* 25.175 1 12.588
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* 24.000 2 16.000
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* 25.175 2 16.783
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* 36.000 1 18.000
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* 24.000 3 24.000
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* 36.000 2 24.000
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* 25.175 3 25.175
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* 36.000 3 36.000
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*/
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struct pixclock {
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u_long min_clock;
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u_long max_clock;
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u_int vidc_ctl;
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u_int vid_ctl;
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};
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static struct pixclock arc_clocks[] = {
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/* we allow +/-1% on these */
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{ 123750, 126250, VIDC_CTRL_DIV3, VID_CTL_24MHz }, /* 8.000MHz */
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{ 82500, 84167, VIDC_CTRL_DIV2, VID_CTL_24MHz }, /* 12.000MHz */
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{ 61875, 63125, VIDC_CTRL_DIV1_5, VID_CTL_24MHz }, /* 16.000MHz */
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{ 41250, 42083, VIDC_CTRL_DIV1, VID_CTL_24MHz }, /* 24.000MHz */
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};
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static struct pixclock *
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acornfb_valid_pixrate(struct fb_var_screeninfo *var)
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{
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u_long pixclock = var->pixclock;
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u_int i;
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if (!var->pixclock)
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return NULL;
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for (i = 0; i < ARRAY_SIZE(arc_clocks); i++)
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if (pixclock > arc_clocks[i].min_clock &&
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pixclock < arc_clocks[i].max_clock)
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return arc_clocks + i;
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return NULL;
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}
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/* VIDC Rules:
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* hcr : must be even (interlace, hcr/2 must be even)
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* hswr : must be even
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* hdsr : must be odd
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* hder : must be odd
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*
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* vcr : must be odd
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* vswr : >= 1
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* vdsr : >= 1
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* vder : >= vdsr
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* if interlaced, then hcr/2 must be even
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*/
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static void
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acornfb_set_timing(struct fb_var_screeninfo *var)
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{
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struct pixclock *pclk;
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struct vidc_timing vidc;
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u_int horiz_correction;
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u_int sync_len, display_start, display_end, cycle;
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u_int is_interlaced;
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u_int vid_ctl, vidc_ctl;
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u_int bandwidth;
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memset(&vidc, 0, sizeof(vidc));
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pclk = acornfb_valid_pixrate(var);
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vidc_ctl = pclk->vidc_ctl;
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vid_ctl = pclk->vid_ctl;
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bandwidth = var->pixclock * 8 / var->bits_per_pixel;
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/* 25.175, 4bpp = 79.444ns per byte, 317.776ns per word: fifo = 2,6 */
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if (bandwidth > 143500)
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vidc_ctl |= VIDC_CTRL_FIFO_3_7;
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else if (bandwidth > 71750)
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vidc_ctl |= VIDC_CTRL_FIFO_2_6;
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else if (bandwidth > 35875)
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vidc_ctl |= VIDC_CTRL_FIFO_1_5;
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else
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vidc_ctl |= VIDC_CTRL_FIFO_0_4;
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switch (var->bits_per_pixel) {
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case 1:
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horiz_correction = 19;
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vidc_ctl |= VIDC_CTRL_1BPP;
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break;
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case 2:
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horiz_correction = 11;
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vidc_ctl |= VIDC_CTRL_2BPP;
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break;
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case 4:
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horiz_correction = 7;
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vidc_ctl |= VIDC_CTRL_4BPP;
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break;
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default:
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case 8:
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horiz_correction = 5;
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vidc_ctl |= VIDC_CTRL_8BPP;
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break;
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}
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if (var->sync & FB_SYNC_COMP_HIGH_ACT) /* should be FB_SYNC_COMP */
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vidc_ctl |= VIDC_CTRL_CSYNC;
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else {
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if (!(var->sync & FB_SYNC_HOR_HIGH_ACT))
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vid_ctl |= VID_CTL_HS_NHSYNC;
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if (!(var->sync & FB_SYNC_VERT_HIGH_ACT))
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vid_ctl |= VID_CTL_VS_NVSYNC;
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}
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sync_len = var->hsync_len;
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display_start = sync_len + var->left_margin;
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display_end = display_start + var->xres;
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cycle = display_end + var->right_margin;
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/* if interlaced, then hcr/2 must be even */
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is_interlaced = (var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED;
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if (is_interlaced) {
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vidc_ctl |= VIDC_CTRL_INTERLACE;
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if (cycle & 2) {
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cycle += 2;
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var->right_margin += 2;
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}
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}
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vidc.h_cycle = (cycle - 2) / 2;
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vidc.h_sync_width = (sync_len - 2) / 2;
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vidc.h_border_start = (display_start - 1) / 2;
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vidc.h_display_start = (display_start - horiz_correction) / 2;
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vidc.h_display_end = (display_end - horiz_correction) / 2;
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vidc.h_border_end = (display_end - 1) / 2;
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vidc.h_interlace = (vidc.h_cycle + 1) / 2;
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sync_len = var->vsync_len;
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display_start = sync_len + var->upper_margin;
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display_end = display_start + var->yres;
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cycle = display_end + var->lower_margin;
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if (is_interlaced)
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cycle = (cycle - 3) / 2;
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else
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cycle = cycle - 1;
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vidc.v_cycle = cycle;
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vidc.v_sync_width = sync_len - 1;
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vidc.v_border_start = display_start - 1;
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vidc.v_display_start = vidc.v_border_start;
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vidc.v_display_end = display_end - 1;
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vidc.v_border_end = vidc.v_display_end;
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if (machine_is_a5k())
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__raw_writeb(vid_ctl, IOEB_VID_CTL);
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if (memcmp(¤t_vidc, &vidc, sizeof(vidc))) {
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current_vidc = vidc;
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vidc_writel(0xe0000000 | vidc_ctl);
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vidc_writel(0x80000000 | (vidc.h_cycle << 14));
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vidc_writel(0x84000000 | (vidc.h_sync_width << 14));
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vidc_writel(0x88000000 | (vidc.h_border_start << 14));
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vidc_writel(0x8c000000 | (vidc.h_display_start << 14));
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vidc_writel(0x90000000 | (vidc.h_display_end << 14));
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vidc_writel(0x94000000 | (vidc.h_border_end << 14));
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vidc_writel(0x98000000);
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vidc_writel(0x9c000000 | (vidc.h_interlace << 14));
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vidc_writel(0xa0000000 | (vidc.v_cycle << 14));
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vidc_writel(0xa4000000 | (vidc.v_sync_width << 14));
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vidc_writel(0xa8000000 | (vidc.v_border_start << 14));
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vidc_writel(0xac000000 | (vidc.v_display_start << 14));
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vidc_writel(0xb0000000 | (vidc.v_display_end << 14));
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vidc_writel(0xb4000000 | (vidc.v_border_end << 14));
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vidc_writel(0xb8000000);
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vidc_writel(0xbc000000);
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}
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#ifdef DEBUG_MODE_SELECTION
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printk(KERN_DEBUG "VIDC registers for %dx%dx%d:\n", var->xres,
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var->yres, var->bits_per_pixel);
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printk(KERN_DEBUG " H-cycle : %d\n", vidc.h_cycle);
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printk(KERN_DEBUG " H-sync-width : %d\n", vidc.h_sync_width);
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printk(KERN_DEBUG " H-border-start : %d\n", vidc.h_border_start);
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printk(KERN_DEBUG " H-display-start : %d\n", vidc.h_display_start);
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printk(KERN_DEBUG " H-display-end : %d\n", vidc.h_display_end);
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printk(KERN_DEBUG " H-border-end : %d\n", vidc.h_border_end);
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printk(KERN_DEBUG " H-interlace : %d\n", vidc.h_interlace);
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printk(KERN_DEBUG " V-cycle : %d\n", vidc.v_cycle);
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printk(KERN_DEBUG " V-sync-width : %d\n", vidc.v_sync_width);
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printk(KERN_DEBUG " V-border-start : %d\n", vidc.v_border_start);
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printk(KERN_DEBUG " V-display-start : %d\n", vidc.v_display_start);
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printk(KERN_DEBUG " V-display-end : %d\n", vidc.v_display_end);
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printk(KERN_DEBUG " V-border-end : %d\n", vidc.v_border_end);
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printk(KERN_DEBUG " VIDC Ctrl (E) : 0x%08X\n", vidc_ctl);
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printk(KERN_DEBUG " IOEB Ctrl : 0x%08X\n", vid_ctl);
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#endif
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}
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static int
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acornfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
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u_int trans, struct fb_info *info)
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{
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union palette pal;
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if (regno >= current_par.palette_size)
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return 1;
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pal.p = 0;
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pal.vidc.reg = regno;
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pal.vidc.red = red >> 12;
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pal.vidc.green = green >> 12;
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pal.vidc.blue = blue >> 12;
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current_par.palette[regno] = pal;
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vidc_writel(pal.p);
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return 0;
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}
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#endif
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#ifdef HAS_VIDC20
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#include <mach/acornfb.h>
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#define MAX_SIZE 2*1024*1024
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/* VIDC20 has a different set of rules from the VIDC:
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* hcr : must be multiple of 4
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* hswr : must be even
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* hdsr : must be even
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* hder : must be even
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* vcr : >= 2, (interlace, must be odd)
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* vswr : >= 1
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* vdsr : >= 1
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* vder : >= vdsr
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*/
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static void acornfb_set_timing(struct fb_info *info)
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{
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struct fb_var_screeninfo *var = &info->var;
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struct vidc_timing vidc;
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u_int vcr, fsize;
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u_int ext_ctl, dat_ctl;
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u_int words_per_line;
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memset(&vidc, 0, sizeof(vidc));
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vidc.h_sync_width = var->hsync_len - 8;
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vidc.h_border_start = vidc.h_sync_width + var->left_margin + 8 - 12;
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vidc.h_display_start = vidc.h_border_start + 12 - 18;
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vidc.h_display_end = vidc.h_display_start + var->xres;
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vidc.h_border_end = vidc.h_display_end + 18 - 12;
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vidc.h_cycle = vidc.h_border_end + var->right_margin + 12 - 8;
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vidc.h_interlace = vidc.h_cycle / 2;
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vidc.v_sync_width = var->vsync_len - 1;
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vidc.v_border_start = vidc.v_sync_width + var->upper_margin;
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vidc.v_display_start = vidc.v_border_start;
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vidc.v_display_end = vidc.v_display_start + var->yres;
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vidc.v_border_end = vidc.v_display_end;
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vidc.control = acornfb_default_control();
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vcr = var->vsync_len + var->upper_margin + var->yres +
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var->lower_margin;
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if ((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
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vidc.v_cycle = (vcr - 3) / 2;
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vidc.control |= VIDC20_CTRL_INT;
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} else
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vidc.v_cycle = vcr - 2;
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switch (var->bits_per_pixel) {
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case 1: vidc.control |= VIDC20_CTRL_1BPP; break;
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case 2: vidc.control |= VIDC20_CTRL_2BPP; break;
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case 4: vidc.control |= VIDC20_CTRL_4BPP; break;
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default:
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case 8: vidc.control |= VIDC20_CTRL_8BPP; break;
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case 16: vidc.control |= VIDC20_CTRL_16BPP; break;
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case 32: vidc.control |= VIDC20_CTRL_32BPP; break;
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}
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acornfb_vidc20_find_rates(&vidc, var);
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fsize = var->vsync_len + var->upper_margin + var->lower_margin - 1;
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if (memcmp(¤t_vidc, &vidc, sizeof(vidc))) {
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current_vidc = vidc;
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vidc_writel(VIDC20_CTRL| vidc.control);
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vidc_writel(0xd0000000 | vidc.pll_ctl);
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vidc_writel(0x80000000 | vidc.h_cycle);
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vidc_writel(0x81000000 | vidc.h_sync_width);
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vidc_writel(0x82000000 | vidc.h_border_start);
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vidc_writel(0x83000000 | vidc.h_display_start);
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vidc_writel(0x84000000 | vidc.h_display_end);
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vidc_writel(0x85000000 | vidc.h_border_end);
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vidc_writel(0x86000000);
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vidc_writel(0x87000000 | vidc.h_interlace);
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vidc_writel(0x90000000 | vidc.v_cycle);
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vidc_writel(0x91000000 | vidc.v_sync_width);
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vidc_writel(0x92000000 | vidc.v_border_start);
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vidc_writel(0x93000000 | vidc.v_display_start);
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vidc_writel(0x94000000 | vidc.v_display_end);
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vidc_writel(0x95000000 | vidc.v_border_end);
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vidc_writel(0x96000000);
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vidc_writel(0x97000000);
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}
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iomd_writel(fsize, IOMD_FSIZE);
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ext_ctl = acornfb_default_econtrol();
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if (var->sync & FB_SYNC_COMP_HIGH_ACT) /* should be FB_SYNC_COMP */
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ext_ctl |= VIDC20_ECTL_HS_NCSYNC | VIDC20_ECTL_VS_NCSYNC;
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else {
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if (var->sync & FB_SYNC_HOR_HIGH_ACT)
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ext_ctl |= VIDC20_ECTL_HS_HSYNC;
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else
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ext_ctl |= VIDC20_ECTL_HS_NHSYNC;
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if (var->sync & FB_SYNC_VERT_HIGH_ACT)
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ext_ctl |= VIDC20_ECTL_VS_VSYNC;
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else
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ext_ctl |= VIDC20_ECTL_VS_NVSYNC;
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}
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vidc_writel(VIDC20_ECTL | ext_ctl);
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words_per_line = var->xres * var->bits_per_pixel / 32;
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if (current_par.using_vram && info->fix.smem_len == 2048*1024)
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words_per_line /= 2;
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/* RiscPC doesn't use the VIDC's VRAM control. */
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dat_ctl = VIDC20_DCTL_VRAM_DIS | VIDC20_DCTL_SNA | words_per_line;
|
|
|
|
/* The data bus width is dependent on both the type
|
|
* and amount of video memory.
|
|
* DRAM 32bit low
|
|
* 1MB VRAM 32bit
|
|
* 2MB VRAM 64bit
|
|
*/
|
|
if (current_par.using_vram && current_par.vram_half_sam == 2048)
|
|
dat_ctl |= VIDC20_DCTL_BUS_D63_0;
|
|
else
|
|
dat_ctl |= VIDC20_DCTL_BUS_D31_0;
|
|
|
|
vidc_writel(VIDC20_DCTL | dat_ctl);
|
|
|
|
#ifdef DEBUG_MODE_SELECTION
|
|
printk(KERN_DEBUG "VIDC registers for %dx%dx%d:\n", var->xres,
|
|
var->yres, var->bits_per_pixel);
|
|
printk(KERN_DEBUG " H-cycle : %d\n", vidc.h_cycle);
|
|
printk(KERN_DEBUG " H-sync-width : %d\n", vidc.h_sync_width);
|
|
printk(KERN_DEBUG " H-border-start : %d\n", vidc.h_border_start);
|
|
printk(KERN_DEBUG " H-display-start : %d\n", vidc.h_display_start);
|
|
printk(KERN_DEBUG " H-display-end : %d\n", vidc.h_display_end);
|
|
printk(KERN_DEBUG " H-border-end : %d\n", vidc.h_border_end);
|
|
printk(KERN_DEBUG " H-interlace : %d\n", vidc.h_interlace);
|
|
printk(KERN_DEBUG " V-cycle : %d\n", vidc.v_cycle);
|
|
printk(KERN_DEBUG " V-sync-width : %d\n", vidc.v_sync_width);
|
|
printk(KERN_DEBUG " V-border-start : %d\n", vidc.v_border_start);
|
|
printk(KERN_DEBUG " V-display-start : %d\n", vidc.v_display_start);
|
|
printk(KERN_DEBUG " V-display-end : %d\n", vidc.v_display_end);
|
|
printk(KERN_DEBUG " V-border-end : %d\n", vidc.v_border_end);
|
|
printk(KERN_DEBUG " Ext Ctrl (C) : 0x%08X\n", ext_ctl);
|
|
printk(KERN_DEBUG " PLL Ctrl (D) : 0x%08X\n", vidc.pll_ctl);
|
|
printk(KERN_DEBUG " Ctrl (E) : 0x%08X\n", vidc.control);
|
|
printk(KERN_DEBUG " Data Ctrl (F) : 0x%08X\n", dat_ctl);
|
|
printk(KERN_DEBUG " Fsize : 0x%08X\n", fsize);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* We have to take note of the VIDC20's 16-bit palette here.
|
|
* The VIDC20 looks up a 16 bit pixel as follows:
|
|
*
|
|
* bits 111111
|
|
* 5432109876543210
|
|
* red ++++++++ (8 bits, 7 to 0)
|
|
* green ++++++++ (8 bits, 11 to 4)
|
|
* blue ++++++++ (8 bits, 15 to 8)
|
|
*
|
|
* We use a pixel which looks like:
|
|
*
|
|
* bits 111111
|
|
* 5432109876543210
|
|
* red +++++ (5 bits, 4 to 0)
|
|
* green +++++ (5 bits, 9 to 5)
|
|
* blue +++++ (5 bits, 14 to 10)
|
|
*/
|
|
static int
|
|
acornfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
|
|
u_int trans, struct fb_info *info)
|
|
{
|
|
union palette pal;
|
|
|
|
if (regno >= current_par.palette_size)
|
|
return 1;
|
|
|
|
if (regno < 16 && info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
|
|
u32 pseudo_val;
|
|
|
|
pseudo_val = regno << info->var.red.offset;
|
|
pseudo_val |= regno << info->var.green.offset;
|
|
pseudo_val |= regno << info->var.blue.offset;
|
|
|
|
((u32 *)info->pseudo_palette)[regno] = pseudo_val;
|
|
}
|
|
|
|
pal.p = 0;
|
|
pal.vidc20.red = red >> 8;
|
|
pal.vidc20.green = green >> 8;
|
|
pal.vidc20.blue = blue >> 8;
|
|
|
|
current_par.palette[regno] = pal;
|
|
|
|
if (info->var.bits_per_pixel == 16) {
|
|
int i;
|
|
|
|
pal.p = 0;
|
|
vidc_writel(0x10000000);
|
|
for (i = 0; i < 256; i += 1) {
|
|
pal.vidc20.red = current_par.palette[ i & 31].vidc20.red;
|
|
pal.vidc20.green = current_par.palette[(i >> 1) & 31].vidc20.green;
|
|
pal.vidc20.blue = current_par.palette[(i >> 2) & 31].vidc20.blue;
|
|
vidc_writel(pal.p);
|
|
/* Palette register pointer auto-increments */
|
|
}
|
|
} else {
|
|
vidc_writel(0x10000000 | regno);
|
|
vidc_writel(pal.p);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Before selecting the timing parameters, adjust
|
|
* the resolution to fit the rules.
|
|
*/
|
|
static int
|
|
acornfb_adjust_timing(struct fb_info *info, struct fb_var_screeninfo *var, u_int fontht)
|
|
{
|
|
u_int font_line_len, sam_size, min_size, size, nr_y;
|
|
|
|
/* xres must be even */
|
|
var->xres = (var->xres + 1) & ~1;
|
|
|
|
/*
|
|
* We don't allow xres_virtual to differ from xres
|
|
*/
|
|
var->xres_virtual = var->xres;
|
|
var->xoffset = 0;
|
|
|
|
if (current_par.using_vram)
|
|
sam_size = current_par.vram_half_sam * 2;
|
|
else
|
|
sam_size = 16;
|
|
|
|
/*
|
|
* Now, find a value for yres_virtual which allows
|
|
* us to do ywrap scrolling. The value of
|
|
* yres_virtual must be such that the end of the
|
|
* displayable frame buffer must be aligned with
|
|
* the start of a font line.
|
|
*/
|
|
font_line_len = var->xres * var->bits_per_pixel * fontht / 8;
|
|
min_size = var->xres * var->yres * var->bits_per_pixel / 8;
|
|
|
|
/*
|
|
* If minimum screen size is greater than that we have
|
|
* available, reject it.
|
|
*/
|
|
if (min_size > info->fix.smem_len)
|
|
return -EINVAL;
|
|
|
|
/* Find int 'y', such that y * fll == s * sam < maxsize
|
|
* y = s * sam / fll; s = maxsize / sam
|
|
*/
|
|
for (size = info->fix.smem_len;
|
|
nr_y = size / font_line_len, min_size <= size;
|
|
size -= sam_size) {
|
|
if (nr_y * font_line_len == size)
|
|
break;
|
|
}
|
|
nr_y *= fontht;
|
|
|
|
if (var->accel_flags & FB_ACCELF_TEXT) {
|
|
if (min_size > size) {
|
|
/*
|
|
* failed, use ypan
|
|
*/
|
|
size = info->fix.smem_len;
|
|
var->yres_virtual = size / (font_line_len / fontht);
|
|
} else
|
|
var->yres_virtual = nr_y;
|
|
} else if (var->yres_virtual > nr_y)
|
|
var->yres_virtual = nr_y;
|
|
|
|
current_par.screen_end = info->fix.smem_start + size;
|
|
|
|
/*
|
|
* Fix yres & yoffset if needed.
|
|
*/
|
|
if (var->yres > var->yres_virtual)
|
|
var->yres = var->yres_virtual;
|
|
|
|
if (var->vmode & FB_VMODE_YWRAP) {
|
|
if (var->yoffset > var->yres_virtual)
|
|
var->yoffset = var->yres_virtual;
|
|
} else {
|
|
if (var->yoffset + var->yres > var->yres_virtual)
|
|
var->yoffset = var->yres_virtual - var->yres;
|
|
}
|
|
|
|
/* hsync_len must be even */
|
|
var->hsync_len = (var->hsync_len + 1) & ~1;
|
|
|
|
#ifdef HAS_VIDC
|
|
/* left_margin must be odd */
|
|
if ((var->left_margin & 1) == 0) {
|
|
var->left_margin -= 1;
|
|
var->right_margin += 1;
|
|
}
|
|
|
|
/* right_margin must be odd */
|
|
var->right_margin |= 1;
|
|
#elif defined(HAS_VIDC20)
|
|
/* left_margin must be even */
|
|
if (var->left_margin & 1) {
|
|
var->left_margin += 1;
|
|
var->right_margin -= 1;
|
|
}
|
|
|
|
/* right_margin must be even */
|
|
if (var->right_margin & 1)
|
|
var->right_margin += 1;
|
|
#endif
|
|
|
|
if (var->vsync_len < 1)
|
|
var->vsync_len = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
acornfb_validate_timing(struct fb_var_screeninfo *var,
|
|
struct fb_monspecs *monspecs)
|
|
{
|
|
unsigned long hs, vs;
|
|
|
|
/*
|
|
* hs(Hz) = 10^12 / (pixclock * xtotal)
|
|
* vs(Hz) = hs(Hz) / ytotal
|
|
*
|
|
* No need to do long long divisions or anything
|
|
* like that if you factor it correctly
|
|
*/
|
|
hs = 1953125000 / var->pixclock;
|
|
hs = hs * 512 /
|
|
(var->xres + var->left_margin + var->right_margin + var->hsync_len);
|
|
vs = hs /
|
|
(var->yres + var->upper_margin + var->lower_margin + var->vsync_len);
|
|
|
|
return (vs >= monspecs->vfmin && vs <= monspecs->vfmax &&
|
|
hs >= monspecs->hfmin && hs <= monspecs->hfmax) ? 0 : -EINVAL;
|
|
}
|
|
|
|
static inline void
|
|
acornfb_update_dma(struct fb_info *info, struct fb_var_screeninfo *var)
|
|
{
|
|
u_int off = var->yoffset * info->fix.line_length;
|
|
|
|
#if defined(HAS_MEMC)
|
|
memc_write(VDMA_INIT, off >> 2);
|
|
#elif defined(HAS_IOMD)
|
|
iomd_writel(info->fix.smem_start + off, IOMD_VIDINIT);
|
|
#endif
|
|
}
|
|
|
|
static int
|
|
acornfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
|
|
{
|
|
u_int fontht;
|
|
int err;
|
|
|
|
/*
|
|
* FIXME: Find the font height
|
|
*/
|
|
fontht = 8;
|
|
|
|
var->red.msb_right = 0;
|
|
var->green.msb_right = 0;
|
|
var->blue.msb_right = 0;
|
|
var->transp.msb_right = 0;
|
|
|
|
switch (var->bits_per_pixel) {
|
|
case 1: case 2: case 4: case 8:
|
|
var->red.offset = 0;
|
|
var->red.length = var->bits_per_pixel;
|
|
var->green = var->red;
|
|
var->blue = var->red;
|
|
var->transp.offset = 0;
|
|
var->transp.length = 0;
|
|
break;
|
|
|
|
#ifdef HAS_VIDC20
|
|
case 16:
|
|
var->red.offset = 0;
|
|
var->red.length = 5;
|
|
var->green.offset = 5;
|
|
var->green.length = 5;
|
|
var->blue.offset = 10;
|
|
var->blue.length = 5;
|
|
var->transp.offset = 15;
|
|
var->transp.length = 1;
|
|
break;
|
|
|
|
case 32:
|
|
var->red.offset = 0;
|
|
var->red.length = 8;
|
|
var->green.offset = 8;
|
|
var->green.length = 8;
|
|
var->blue.offset = 16;
|
|
var->blue.length = 8;
|
|
var->transp.offset = 24;
|
|
var->transp.length = 4;
|
|
break;
|
|
#endif
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Check to see if the pixel rate is valid.
|
|
*/
|
|
if (!acornfb_valid_pixrate(var))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Validate and adjust the resolution to
|
|
* match the video generator hardware.
|
|
*/
|
|
err = acornfb_adjust_timing(info, var, fontht);
|
|
if (err)
|
|
return err;
|
|
|
|
/*
|
|
* Validate the timing against the
|
|
* monitor hardware.
|
|
*/
|
|
return acornfb_validate_timing(var, &info->monspecs);
|
|
}
|
|
|
|
static int acornfb_set_par(struct fb_info *info)
|
|
{
|
|
switch (info->var.bits_per_pixel) {
|
|
case 1:
|
|
current_par.palette_size = 2;
|
|
info->fix.visual = FB_VISUAL_MONO10;
|
|
break;
|
|
case 2:
|
|
current_par.palette_size = 4;
|
|
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
|
|
break;
|
|
case 4:
|
|
current_par.palette_size = 16;
|
|
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
|
|
break;
|
|
case 8:
|
|
current_par.palette_size = VIDC_PALETTE_SIZE;
|
|
#ifdef HAS_VIDC
|
|
info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
|
|
#else
|
|
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
|
|
#endif
|
|
break;
|
|
#ifdef HAS_VIDC20
|
|
case 16:
|
|
current_par.palette_size = 32;
|
|
info->fix.visual = FB_VISUAL_DIRECTCOLOR;
|
|
break;
|
|
case 32:
|
|
current_par.palette_size = VIDC_PALETTE_SIZE;
|
|
info->fix.visual = FB_VISUAL_DIRECTCOLOR;
|
|
break;
|
|
#endif
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
info->fix.line_length = (info->var.xres * info->var.bits_per_pixel) / 8;
|
|
|
|
#if defined(HAS_MEMC)
|
|
{
|
|
unsigned long size = info->fix.smem_len - VDMA_XFERSIZE;
|
|
|
|
memc_write(VDMA_START, 0);
|
|
memc_write(VDMA_END, size >> 2);
|
|
}
|
|
#elif defined(HAS_IOMD)
|
|
{
|
|
unsigned long start, size;
|
|
u_int control;
|
|
|
|
start = info->fix.smem_start;
|
|
size = current_par.screen_end;
|
|
|
|
if (current_par.using_vram) {
|
|
size -= current_par.vram_half_sam;
|
|
control = DMA_CR_E | (current_par.vram_half_sam / 256);
|
|
} else {
|
|
size -= 16;
|
|
control = DMA_CR_E | DMA_CR_D | 16;
|
|
}
|
|
|
|
iomd_writel(start, IOMD_VIDSTART);
|
|
iomd_writel(size, IOMD_VIDEND);
|
|
iomd_writel(control, IOMD_VIDCR);
|
|
}
|
|
#endif
|
|
|
|
acornfb_update_dma(info, &info->var);
|
|
acornfb_set_timing(info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
acornfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
|
|
{
|
|
u_int y_bottom = var->yoffset;
|
|
|
|
if (!(var->vmode & FB_VMODE_YWRAP))
|
|
y_bottom += var->yres;
|
|
|
|
BUG_ON(y_bottom > var->yres_virtual);
|
|
|
|
acornfb_update_dma(info, var);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Note that we are entered with the kernel locked.
|
|
*/
|
|
static int
|
|
acornfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
|
|
{
|
|
unsigned long off, start;
|
|
u32 len;
|
|
|
|
off = vma->vm_pgoff << PAGE_SHIFT;
|
|
|
|
start = info->fix.smem_start;
|
|
len = PAGE_ALIGN(start & ~PAGE_MASK) + info->fix.smem_len;
|
|
start &= PAGE_MASK;
|
|
if ((vma->vm_end - vma->vm_start + off) > len)
|
|
return -EINVAL;
|
|
off += start;
|
|
vma->vm_pgoff = off >> PAGE_SHIFT;
|
|
|
|
/* This is an IO map - tell maydump to skip this VMA */
|
|
vma->vm_flags |= VM_IO;
|
|
|
|
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
|
|
|
|
/*
|
|
* Don't alter the page protection flags; we want to keep the area
|
|
* cached for better performance. This does mean that we may miss
|
|
* some updates to the screen occasionally, but process switches
|
|
* should cause the caches and buffers to be flushed often enough.
|
|
*/
|
|
if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
|
|
vma->vm_end - vma->vm_start,
|
|
vma->vm_page_prot))
|
|
return -EAGAIN;
|
|
return 0;
|
|
}
|
|
|
|
static struct fb_ops acornfb_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_check_var = acornfb_check_var,
|
|
.fb_set_par = acornfb_set_par,
|
|
.fb_setcolreg = acornfb_setcolreg,
|
|
.fb_pan_display = acornfb_pan_display,
|
|
.fb_fillrect = cfb_fillrect,
|
|
.fb_copyarea = cfb_copyarea,
|
|
.fb_imageblit = cfb_imageblit,
|
|
.fb_mmap = acornfb_mmap,
|
|
};
|
|
|
|
/*
|
|
* Everything after here is initialisation!!!
|
|
*/
|
|
static struct fb_videomode modedb[] __initdata = {
|
|
{ /* 320x256 @ 50Hz */
|
|
NULL, 50, 320, 256, 125000, 92, 62, 35, 19, 38, 2,
|
|
FB_SYNC_COMP_HIGH_ACT,
|
|
FB_VMODE_NONINTERLACED
|
|
}, { /* 640x250 @ 50Hz, 15.6 kHz hsync */
|
|
NULL, 50, 640, 250, 62500, 185, 123, 38, 21, 76, 3,
|
|
0,
|
|
FB_VMODE_NONINTERLACED
|
|
}, { /* 640x256 @ 50Hz, 15.6 kHz hsync */
|
|
NULL, 50, 640, 256, 62500, 185, 123, 35, 18, 76, 3,
|
|
0,
|
|
FB_VMODE_NONINTERLACED
|
|
}, { /* 640x512 @ 50Hz, 26.8 kHz hsync */
|
|
NULL, 50, 640, 512, 41667, 113, 87, 18, 1, 56, 3,
|
|
0,
|
|
FB_VMODE_NONINTERLACED
|
|
}, { /* 640x250 @ 70Hz, 31.5 kHz hsync */
|
|
NULL, 70, 640, 250, 39722, 48, 16, 109, 88, 96, 2,
|
|
0,
|
|
FB_VMODE_NONINTERLACED
|
|
}, { /* 640x256 @ 70Hz, 31.5 kHz hsync */
|
|
NULL, 70, 640, 256, 39722, 48, 16, 106, 85, 96, 2,
|
|
0,
|
|
FB_VMODE_NONINTERLACED
|
|
}, { /* 640x352 @ 70Hz, 31.5 kHz hsync */
|
|
NULL, 70, 640, 352, 39722, 48, 16, 58, 37, 96, 2,
|
|
0,
|
|
FB_VMODE_NONINTERLACED
|
|
}, { /* 640x480 @ 60Hz, 31.5 kHz hsync */
|
|
NULL, 60, 640, 480, 39722, 48, 16, 32, 11, 96, 2,
|
|
0,
|
|
FB_VMODE_NONINTERLACED
|
|
}, { /* 800x600 @ 56Hz, 35.2 kHz hsync */
|
|
NULL, 56, 800, 600, 27778, 101, 23, 22, 1, 100, 2,
|
|
0,
|
|
FB_VMODE_NONINTERLACED
|
|
}, { /* 896x352 @ 60Hz, 21.8 kHz hsync */
|
|
NULL, 60, 896, 352, 41667, 59, 27, 9, 0, 118, 3,
|
|
0,
|
|
FB_VMODE_NONINTERLACED
|
|
}, { /* 1024x 768 @ 60Hz, 48.4 kHz hsync */
|
|
NULL, 60, 1024, 768, 15385, 160, 24, 29, 3, 136, 6,
|
|
0,
|
|
FB_VMODE_NONINTERLACED
|
|
}, { /* 1280x1024 @ 60Hz, 63.8 kHz hsync */
|
|
NULL, 60, 1280, 1024, 9090, 186, 96, 38, 1, 160, 3,
|
|
0,
|
|
FB_VMODE_NONINTERLACED
|
|
}
|
|
};
|
|
|
|
static struct fb_videomode __initdata
|
|
acornfb_default_mode = {
|
|
.name = NULL,
|
|
.refresh = 60,
|
|
.xres = 640,
|
|
.yres = 480,
|
|
.pixclock = 39722,
|
|
.left_margin = 56,
|
|
.right_margin = 16,
|
|
.upper_margin = 34,
|
|
.lower_margin = 9,
|
|
.hsync_len = 88,
|
|
.vsync_len = 2,
|
|
.sync = 0,
|
|
.vmode = FB_VMODE_NONINTERLACED
|
|
};
|
|
|
|
static void __init acornfb_init_fbinfo(void)
|
|
{
|
|
static int first = 1;
|
|
|
|
if (!first)
|
|
return;
|
|
first = 0;
|
|
|
|
fb_info.fbops = &acornfb_ops;
|
|
fb_info.flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
|
|
fb_info.pseudo_palette = current_par.pseudo_palette;
|
|
|
|
strcpy(fb_info.fix.id, "Acorn");
|
|
fb_info.fix.type = FB_TYPE_PACKED_PIXELS;
|
|
fb_info.fix.type_aux = 0;
|
|
fb_info.fix.xpanstep = 0;
|
|
fb_info.fix.ypanstep = 1;
|
|
fb_info.fix.ywrapstep = 1;
|
|
fb_info.fix.line_length = 0;
|
|
fb_info.fix.accel = FB_ACCEL_NONE;
|
|
|
|
/*
|
|
* setup initial parameters
|
|
*/
|
|
memset(&fb_info.var, 0, sizeof(fb_info.var));
|
|
|
|
#if defined(HAS_VIDC20)
|
|
fb_info.var.red.length = 8;
|
|
fb_info.var.transp.length = 4;
|
|
#elif defined(HAS_VIDC)
|
|
fb_info.var.red.length = 4;
|
|
fb_info.var.transp.length = 1;
|
|
#endif
|
|
fb_info.var.green = fb_info.var.red;
|
|
fb_info.var.blue = fb_info.var.red;
|
|
fb_info.var.nonstd = 0;
|
|
fb_info.var.activate = FB_ACTIVATE_NOW;
|
|
fb_info.var.height = -1;
|
|
fb_info.var.width = -1;
|
|
fb_info.var.vmode = FB_VMODE_NONINTERLACED;
|
|
fb_info.var.accel_flags = FB_ACCELF_TEXT;
|
|
|
|
current_par.dram_size = 0;
|
|
current_par.montype = -1;
|
|
current_par.dpms = 0;
|
|
}
|
|
|
|
/*
|
|
* setup acornfb options:
|
|
*
|
|
* mon:hmin-hmax:vmin-vmax:dpms:width:height
|
|
* Set monitor parameters:
|
|
* hmin = horizontal minimum frequency (Hz)
|
|
* hmax = horizontal maximum frequency (Hz) (optional)
|
|
* vmin = vertical minimum frequency (Hz)
|
|
* vmax = vertical maximum frequency (Hz) (optional)
|
|
* dpms = DPMS supported? (optional)
|
|
* width = width of picture in mm. (optional)
|
|
* height = height of picture in mm. (optional)
|
|
*
|
|
* montype:type
|
|
* Set RISC-OS style monitor type:
|
|
* 0 (or tv) - TV frequency
|
|
* 1 (or multi) - Multi frequency
|
|
* 2 (or hires) - Hi-res monochrome
|
|
* 3 (or vga) - VGA
|
|
* 4 (or svga) - SVGA
|
|
* auto, or option missing
|
|
* - try hardware detect
|
|
*
|
|
* dram:size
|
|
* Set the amount of DRAM to use for the frame buffer
|
|
* (even if you have VRAM).
|
|
* size can optionally be followed by 'M' or 'K' for
|
|
* MB or KB respectively.
|
|
*/
|
|
static void __init
|
|
acornfb_parse_mon(char *opt)
|
|
{
|
|
char *p = opt;
|
|
|
|
current_par.montype = -2;
|
|
|
|
fb_info.monspecs.hfmin = simple_strtoul(p, &p, 0);
|
|
if (*p == '-')
|
|
fb_info.monspecs.hfmax = simple_strtoul(p + 1, &p, 0);
|
|
else
|
|
fb_info.monspecs.hfmax = fb_info.monspecs.hfmin;
|
|
|
|
if (*p != ':')
|
|
goto bad;
|
|
|
|
fb_info.monspecs.vfmin = simple_strtoul(p + 1, &p, 0);
|
|
if (*p == '-')
|
|
fb_info.monspecs.vfmax = simple_strtoul(p + 1, &p, 0);
|
|
else
|
|
fb_info.monspecs.vfmax = fb_info.monspecs.vfmin;
|
|
|
|
if (*p != ':')
|
|
goto check_values;
|
|
|
|
fb_info.monspecs.dpms = simple_strtoul(p + 1, &p, 0);
|
|
|
|
if (*p != ':')
|
|
goto check_values;
|
|
|
|
fb_info.var.width = simple_strtoul(p + 1, &p, 0);
|
|
|
|
if (*p != ':')
|
|
goto check_values;
|
|
|
|
fb_info.var.height = simple_strtoul(p + 1, NULL, 0);
|
|
|
|
check_values:
|
|
if (fb_info.monspecs.hfmax < fb_info.monspecs.hfmin ||
|
|
fb_info.monspecs.vfmax < fb_info.monspecs.vfmin)
|
|
goto bad;
|
|
return;
|
|
|
|
bad:
|
|
printk(KERN_ERR "Acornfb: bad monitor settings: %s\n", opt);
|
|
current_par.montype = -1;
|
|
}
|
|
|
|
static void __init
|
|
acornfb_parse_montype(char *opt)
|
|
{
|
|
current_par.montype = -2;
|
|
|
|
if (strncmp(opt, "tv", 2) == 0) {
|
|
opt += 2;
|
|
current_par.montype = 0;
|
|
} else if (strncmp(opt, "multi", 5) == 0) {
|
|
opt += 5;
|
|
current_par.montype = 1;
|
|
} else if (strncmp(opt, "hires", 5) == 0) {
|
|
opt += 5;
|
|
current_par.montype = 2;
|
|
} else if (strncmp(opt, "vga", 3) == 0) {
|
|
opt += 3;
|
|
current_par.montype = 3;
|
|
} else if (strncmp(opt, "svga", 4) == 0) {
|
|
opt += 4;
|
|
current_par.montype = 4;
|
|
} else if (strncmp(opt, "auto", 4) == 0) {
|
|
opt += 4;
|
|
current_par.montype = -1;
|
|
} else if (isdigit(*opt))
|
|
current_par.montype = simple_strtoul(opt, &opt, 0);
|
|
|
|
if (current_par.montype == -2 ||
|
|
current_par.montype > NR_MONTYPES) {
|
|
printk(KERN_ERR "acornfb: unknown monitor type: %s\n",
|
|
opt);
|
|
current_par.montype = -1;
|
|
} else
|
|
if (opt && *opt) {
|
|
if (strcmp(opt, ",dpms") == 0)
|
|
current_par.dpms = 1;
|
|
else
|
|
printk(KERN_ERR
|
|
"acornfb: unknown monitor option: %s\n",
|
|
opt);
|
|
}
|
|
}
|
|
|
|
static void __init
|
|
acornfb_parse_dram(char *opt)
|
|
{
|
|
unsigned int size;
|
|
|
|
size = simple_strtoul(opt, &opt, 0);
|
|
|
|
if (opt) {
|
|
switch (*opt) {
|
|
case 'M':
|
|
case 'm':
|
|
size *= 1024;
|
|
case 'K':
|
|
case 'k':
|
|
size *= 1024;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
current_par.dram_size = size;
|
|
}
|
|
|
|
static struct options {
|
|
char *name;
|
|
void (*parse)(char *opt);
|
|
} opt_table[] __initdata = {
|
|
{ "mon", acornfb_parse_mon },
|
|
{ "montype", acornfb_parse_montype },
|
|
{ "dram", acornfb_parse_dram },
|
|
{ NULL, NULL }
|
|
};
|
|
|
|
int __init
|
|
acornfb_setup(char *options)
|
|
{
|
|
struct options *optp;
|
|
char *opt;
|
|
|
|
if (!options || !*options)
|
|
return 0;
|
|
|
|
acornfb_init_fbinfo();
|
|
|
|
while ((opt = strsep(&options, ",")) != NULL) {
|
|
if (!*opt)
|
|
continue;
|
|
|
|
for (optp = opt_table; optp->name; optp++) {
|
|
int optlen;
|
|
|
|
optlen = strlen(optp->name);
|
|
|
|
if (strncmp(opt, optp->name, optlen) == 0 &&
|
|
opt[optlen] == ':') {
|
|
optp->parse(opt + optlen + 1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!optp->name)
|
|
printk(KERN_ERR "acornfb: unknown parameter: %s\n",
|
|
opt);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Detect type of monitor connected
|
|
* For now, we just assume SVGA
|
|
*/
|
|
static int __init
|
|
acornfb_detect_monitortype(void)
|
|
{
|
|
return 4;
|
|
}
|
|
|
|
/*
|
|
* This enables the unused memory to be freed on older Acorn machines.
|
|
* We are freeing memory on behalf of the architecture initialisation
|
|
* code here.
|
|
*/
|
|
static inline void
|
|
free_unused_pages(unsigned int virtual_start, unsigned int virtual_end)
|
|
{
|
|
int mb_freed = 0;
|
|
|
|
/*
|
|
* Align addresses
|
|
*/
|
|
virtual_start = PAGE_ALIGN(virtual_start);
|
|
virtual_end = PAGE_ALIGN(virtual_end);
|
|
|
|
while (virtual_start < virtual_end) {
|
|
struct page *page;
|
|
|
|
/*
|
|
* Clear page reserved bit,
|
|
* set count to 1, and free
|
|
* the page.
|
|
*/
|
|
page = virt_to_page(virtual_start);
|
|
ClearPageReserved(page);
|
|
init_page_count(page);
|
|
free_page(virtual_start);
|
|
|
|
virtual_start += PAGE_SIZE;
|
|
mb_freed += PAGE_SIZE / 1024;
|
|
}
|
|
|
|
printk("acornfb: freed %dK memory\n", mb_freed);
|
|
}
|
|
|
|
static int __init acornfb_probe(struct platform_device *dev)
|
|
{
|
|
unsigned long size;
|
|
u_int h_sync, v_sync;
|
|
int rc, i;
|
|
char *option = NULL;
|
|
|
|
if (fb_get_options("acornfb", &option))
|
|
return -ENODEV;
|
|
acornfb_setup(option);
|
|
|
|
acornfb_init_fbinfo();
|
|
|
|
current_par.dev = &dev->dev;
|
|
|
|
if (current_par.montype == -1)
|
|
current_par.montype = acornfb_detect_monitortype();
|
|
|
|
if (current_par.montype == -1 || current_par.montype > NR_MONTYPES)
|
|
current_par.montype = 4;
|
|
|
|
if (current_par.montype >= 0) {
|
|
fb_info.monspecs = monspecs[current_par.montype];
|
|
fb_info.monspecs.dpms = current_par.dpms;
|
|
}
|
|
|
|
/*
|
|
* Try to select a suitable default mode
|
|
*/
|
|
for (i = 0; i < ARRAY_SIZE(modedb); i++) {
|
|
unsigned long hs;
|
|
|
|
hs = modedb[i].refresh *
|
|
(modedb[i].yres + modedb[i].upper_margin +
|
|
modedb[i].lower_margin + modedb[i].vsync_len);
|
|
if (modedb[i].xres == DEFAULT_XRES &&
|
|
modedb[i].yres == DEFAULT_YRES &&
|
|
modedb[i].refresh >= fb_info.monspecs.vfmin &&
|
|
modedb[i].refresh <= fb_info.monspecs.vfmax &&
|
|
hs >= fb_info.monspecs.hfmin &&
|
|
hs <= fb_info.monspecs.hfmax) {
|
|
acornfb_default_mode = modedb[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
fb_info.screen_base = (char *)SCREEN_BASE;
|
|
fb_info.fix.smem_start = SCREEN_START;
|
|
current_par.using_vram = 0;
|
|
|
|
/*
|
|
* If vram_size is set, we are using VRAM in
|
|
* a Risc PC. However, if the user has specified
|
|
* an amount of DRAM then use that instead.
|
|
*/
|
|
if (vram_size && !current_par.dram_size) {
|
|
size = vram_size;
|
|
current_par.vram_half_sam = vram_size / 1024;
|
|
current_par.using_vram = 1;
|
|
} else if (current_par.dram_size)
|
|
size = current_par.dram_size;
|
|
else
|
|
size = MAX_SIZE;
|
|
|
|
/*
|
|
* Limit maximum screen size.
|
|
*/
|
|
if (size > MAX_SIZE)
|
|
size = MAX_SIZE;
|
|
|
|
size = PAGE_ALIGN(size);
|
|
|
|
#if defined(HAS_VIDC20)
|
|
if (!current_par.using_vram) {
|
|
dma_addr_t handle;
|
|
void *base;
|
|
|
|
/*
|
|
* RiscPC needs to allocate the DRAM memory
|
|
* for the framebuffer if we are not using
|
|
* VRAM.
|
|
*/
|
|
base = dma_alloc_writecombine(current_par.dev, size, &handle,
|
|
GFP_KERNEL);
|
|
if (base == NULL) {
|
|
printk(KERN_ERR "acornfb: unable to allocate screen "
|
|
"memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
fb_info.screen_base = base;
|
|
fb_info.fix.smem_start = handle;
|
|
}
|
|
#endif
|
|
#if defined(HAS_VIDC)
|
|
/*
|
|
* Archimedes/A5000 machines use a fixed address for their
|
|
* framebuffers. Free unused pages
|
|
*/
|
|
free_unused_pages(PAGE_OFFSET + size, PAGE_OFFSET + MAX_SIZE);
|
|
#endif
|
|
|
|
fb_info.fix.smem_len = size;
|
|
current_par.palette_size = VIDC_PALETTE_SIZE;
|
|
|
|
/*
|
|
* Lookup the timing for this resolution. If we can't
|
|
* find it, then we can't restore it if we change
|
|
* the resolution, so we disable this feature.
|
|
*/
|
|
do {
|
|
rc = fb_find_mode(&fb_info.var, &fb_info, NULL, modedb,
|
|
ARRAY_SIZE(modedb),
|
|
&acornfb_default_mode, DEFAULT_BPP);
|
|
/*
|
|
* If we found an exact match, all ok.
|
|
*/
|
|
if (rc == 1)
|
|
break;
|
|
|
|
rc = fb_find_mode(&fb_info.var, &fb_info, NULL, NULL, 0,
|
|
&acornfb_default_mode, DEFAULT_BPP);
|
|
/*
|
|
* If we found an exact match, all ok.
|
|
*/
|
|
if (rc == 1)
|
|
break;
|
|
|
|
rc = fb_find_mode(&fb_info.var, &fb_info, NULL, modedb,
|
|
ARRAY_SIZE(modedb),
|
|
&acornfb_default_mode, DEFAULT_BPP);
|
|
if (rc)
|
|
break;
|
|
|
|
rc = fb_find_mode(&fb_info.var, &fb_info, NULL, NULL, 0,
|
|
&acornfb_default_mode, DEFAULT_BPP);
|
|
} while (0);
|
|
|
|
/*
|
|
* If we didn't find an exact match, try the
|
|
* generic database.
|
|
*/
|
|
if (rc == 0) {
|
|
printk("Acornfb: no valid mode found\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
h_sync = 1953125000 / fb_info.var.pixclock;
|
|
h_sync = h_sync * 512 / (fb_info.var.xres + fb_info.var.left_margin +
|
|
fb_info.var.right_margin + fb_info.var.hsync_len);
|
|
v_sync = h_sync / (fb_info.var.yres + fb_info.var.upper_margin +
|
|
fb_info.var.lower_margin + fb_info.var.vsync_len);
|
|
|
|
printk(KERN_INFO "Acornfb: %dkB %cRAM, %s, using %dx%d, "
|
|
"%d.%03dkHz, %dHz\n",
|
|
fb_info.fix.smem_len / 1024,
|
|
current_par.using_vram ? 'V' : 'D',
|
|
VIDC_NAME, fb_info.var.xres, fb_info.var.yres,
|
|
h_sync / 1000, h_sync % 1000, v_sync);
|
|
|
|
printk(KERN_INFO "Acornfb: Monitor: %d.%03d-%d.%03dkHz, %d-%dHz%s\n",
|
|
fb_info.monspecs.hfmin / 1000, fb_info.monspecs.hfmin % 1000,
|
|
fb_info.monspecs.hfmax / 1000, fb_info.monspecs.hfmax % 1000,
|
|
fb_info.monspecs.vfmin, fb_info.monspecs.vfmax,
|
|
fb_info.monspecs.dpms ? ", DPMS" : "");
|
|
|
|
if (fb_set_var(&fb_info, &fb_info.var))
|
|
printk(KERN_ERR "Acornfb: unable to set display parameters\n");
|
|
|
|
if (register_framebuffer(&fb_info) < 0)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver acornfb_driver = {
|
|
.probe = acornfb_probe,
|
|
.driver = {
|
|
.name = "acornfb",
|
|
},
|
|
};
|
|
|
|
static int __init acornfb_init(void)
|
|
{
|
|
return platform_driver_register(&acornfb_driver);
|
|
}
|
|
|
|
module_init(acornfb_init);
|
|
|
|
MODULE_AUTHOR("Russell King");
|
|
MODULE_DESCRIPTION("VIDC 1/1a/20 framebuffer driver");
|
|
MODULE_LICENSE("GPL");
|