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e31cf2f4ca
Patch series "mm: consolidate definitions of page table accessors", v2. The low level page table accessors (pXY_index(), pXY_offset()) are duplicated across all architectures and sometimes more than once. For instance, we have 31 definition of pgd_offset() for 25 supported architectures. Most of these definitions are actually identical and typically it boils down to, e.g. static inline unsigned long pmd_index(unsigned long address) { return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); } static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) { return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); } These definitions can be shared among 90% of the arches provided XYZ_SHIFT, PTRS_PER_XYZ and xyz_page_vaddr() are defined. For architectures that really need a custom version there is always possibility to override the generic version with the usual ifdefs magic. These patches introduce include/linux/pgtable.h that replaces include/asm-generic/pgtable.h and add the definitions of the page table accessors to the new header. This patch (of 12): The linux/mm.h header includes <asm/pgtable.h> to allow inlining of the functions involving page table manipulations, e.g. pte_alloc() and pmd_alloc(). So, there is no point to explicitly include <asm/pgtable.h> in the files that include <linux/mm.h>. The include statements in such cases are remove with a simple loop: for f in $(git grep -l "include <linux/mm.h>") ; do sed -i -e '/include <asm\/pgtable.h>/ d' $f done Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Cain <bcain@codeaurora.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chris Zankel <chris@zankel.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Mark Salter <msalter@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Mike Rapoport <rppt@kernel.org> Cc: Nick Hu <nickhu@andestech.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20200514170327.31389-1-rppt@kernel.org Link: http://lkml.kernel.org/r/20200514170327.31389-2-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1139 lines
28 KiB
C
1139 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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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* 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/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 <linux/gfp.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 "acornfb.h"
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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] = {
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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_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;
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/* The data bus width is dependent on both the type
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* and amount of video memory.
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* DRAM 32bit low
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* 1MB VRAM 32bit
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* 2MB VRAM 64bit
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*/
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if (current_par.using_vram && current_par.vram_half_sam == 2048)
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dat_ctl |= VIDC20_DCTL_BUS_D63_0;
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else
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dat_ctl |= VIDC20_DCTL_BUS_D31_0;
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vidc_writel(VIDC20_DCTL | dat_ctl);
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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 " Ext Ctrl (C) : 0x%08X\n", ext_ctl);
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printk(KERN_DEBUG " PLL Ctrl (D) : 0x%08X\n", vidc.pll_ctl);
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printk(KERN_DEBUG " Ctrl (E) : 0x%08X\n", vidc.control);
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printk(KERN_DEBUG " Data Ctrl (F) : 0x%08X\n", dat_ctl);
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printk(KERN_DEBUG " Fsize : 0x%08X\n", fsize);
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#endif
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}
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/*
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* We have to take note of the VIDC20's 16-bit palette here.
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* The VIDC20 looks up a 16 bit pixel as follows:
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*
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* bits 111111
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* 5432109876543210
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* red ++++++++ (8 bits, 7 to 0)
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* green ++++++++ (8 bits, 11 to 4)
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* blue ++++++++ (8 bits, 15 to 8)
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*
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* We use a pixel which looks like:
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*
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* bits 111111
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* 5432109876543210
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* red +++++ (5 bits, 4 to 0)
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* green +++++ (5 bits, 9 to 5)
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* blue +++++ (5 bits, 14 to 10)
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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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if (regno < 16 && info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
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u32 pseudo_val;
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pseudo_val = regno << info->var.red.offset;
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pseudo_val |= regno << info->var.green.offset;
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pseudo_val |= regno << info->var.blue.offset;
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((u32 *)info->pseudo_palette)[regno] = pseudo_val;
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}
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pal.p = 0;
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pal.vidc20.red = red >> 8;
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pal.vidc20.green = green >> 8;
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pal.vidc20.blue = blue >> 8;
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current_par.palette[regno] = pal;
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if (info->var.bits_per_pixel == 16) {
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int i;
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pal.p = 0;
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vidc_writel(0x10000000);
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for (i = 0; i < 256; i += 1) {
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pal.vidc20.red = current_par.palette[i & 31].vidc20.red;
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pal.vidc20.green = current_par.palette[(i >> 1) & 31].vidc20.green;
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pal.vidc20.blue = current_par.palette[(i >> 2) & 31].vidc20.blue;
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vidc_writel(pal.p);
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/* Palette register pointer auto-increments */
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}
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} else {
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vidc_writel(0x10000000 | regno);
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vidc_writel(pal.p);
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}
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return 0;
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}
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#endif
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/*
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* Before selecting the timing parameters, adjust
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* the resolution to fit the rules.
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*/
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static int
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acornfb_adjust_timing(struct fb_info *info, struct fb_var_screeninfo *var, u_int fontht)
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{
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u_int font_line_len, sam_size, min_size, size, nr_y;
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/* xres must be even */
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var->xres = (var->xres + 1) & ~1;
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/*
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* We don't allow xres_virtual to differ from xres
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*/
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var->xres_virtual = var->xres;
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var->xoffset = 0;
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if (current_par.using_vram)
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sam_size = current_par.vram_half_sam * 2;
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else
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sam_size = 16;
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/*
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* Now, find a value for yres_virtual which allows
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* us to do ywrap scrolling. The value of
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* yres_virtual must be such that the end of the
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* displayable frame buffer must be aligned with
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* the start of a font line.
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*/
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font_line_len = var->xres * var->bits_per_pixel * fontht / 8;
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min_size = var->xres * var->yres * var->bits_per_pixel / 8;
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/*
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* If minimum screen size is greater than that we have
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* available, reject it.
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*/
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if (min_size > info->fix.smem_len)
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return -EINVAL;
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/* Find int 'y', such that y * fll == s * sam < maxsize
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* y = s * sam / fll; s = maxsize / sam
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*/
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for (size = info->fix.smem_len;
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nr_y = size / font_line_len, min_size <= size;
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size -= sam_size) {
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if (nr_y * font_line_len == size)
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break;
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}
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nr_y *= fontht;
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if (var->accel_flags & FB_ACCELF_TEXT) {
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if (min_size > size) {
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/*
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* failed, use ypan
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*/
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size = info->fix.smem_len;
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var->yres_virtual = size / (font_line_len / fontht);
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} else
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var->yres_virtual = nr_y;
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} else if (var->yres_virtual > nr_y)
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var->yres_virtual = nr_y;
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current_par.screen_end = info->fix.smem_start + size;
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/*
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* Fix yres & yoffset if needed.
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*/
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if (var->yres > var->yres_virtual)
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var->yres = var->yres_virtual;
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if (var->vmode & FB_VMODE_YWRAP) {
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if (var->yoffset > var->yres_virtual)
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var->yoffset = var->yres_virtual;
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} else {
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if (var->yoffset + var->yres > var->yres_virtual)
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var->yoffset = var->yres_virtual - var->yres;
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}
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/* hsync_len must be even */
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var->hsync_len = (var->hsync_len + 1) & ~1;
|
|
|
|
#if 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;
|
|
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
|
|
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 += info->var.yres;
|
|
|
|
if (y_bottom > info->var.yres_virtual)
|
|
return -EINVAL;
|
|
|
|
acornfb_update_dma(info, var);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const 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,
|
|
};
|
|
|
|
/*
|
|
* Everything after here is initialisation!!!
|
|
*/
|
|
static struct fb_videomode modedb[] = {
|
|
{ /* 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 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 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;
|
|
#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 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 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 acornfb_parse_dram(char *opt)
|
|
{
|
|
unsigned int size;
|
|
|
|
size = simple_strtoul(opt, &opt, 0);
|
|
|
|
if (opt) {
|
|
switch (*opt) {
|
|
case 'M':
|
|
case 'm':
|
|
size *= 1024;
|
|
/* Fall through */
|
|
case 'K':
|
|
case 'k':
|
|
size *= 1024;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
current_par.dram_size = size;
|
|
}
|
|
|
|
static struct options {
|
|
char *name;
|
|
void (*parse)(char *opt);
|
|
} opt_table[] = {
|
|
{ "mon", acornfb_parse_mon },
|
|
{ "montype", acornfb_parse_montype },
|
|
{ "dram", acornfb_parse_dram },
|
|
{ NULL, NULL }
|
|
};
|
|
|
|
static int 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 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);
|
|
__free_reserved_page(page);
|
|
|
|
virtual_start += PAGE_SIZE;
|
|
mb_freed += PAGE_SIZE / 1024;
|
|
}
|
|
|
|
printk("acornfb: freed %dK memory\n", mb_freed);
|
|
}
|
|
|
|
static int 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_wc(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
|
|
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");
|