481 lines
12 KiB
C
481 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* drivers/video/geode/gx1fb_core.c
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* -- Geode GX1 framebuffer driver
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*
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* Copyright (C) 2005 Arcom Control Systems Ltd.
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*/
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#include <linux/aperture.h>
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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/mm.h>
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#include <linux/delay.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include "geodefb.h"
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#include "display_gx1.h"
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#include "video_cs5530.h"
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static char mode_option[32] = "640x480-16@60";
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static int crt_option = 1;
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static char panel_option[32] = "";
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/* Modes relevant to the GX1 (taken from modedb.c) */
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static const struct fb_videomode gx1_modedb[] = {
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/* 640x480-60 VESA */
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{ NULL, 60, 640, 480, 39682, 48, 16, 33, 10, 96, 2,
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0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 640x480-75 VESA */
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{ NULL, 75, 640, 480, 31746, 120, 16, 16, 01, 64, 3,
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0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 640x480-85 VESA */
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{ NULL, 85, 640, 480, 27777, 80, 56, 25, 01, 56, 3,
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0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 800x600-60 VESA */
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{ NULL, 60, 800, 600, 25000, 88, 40, 23, 01, 128, 4,
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FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 800x600-75 VESA */
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{ NULL, 75, 800, 600, 20202, 160, 16, 21, 01, 80, 3,
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FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 800x600-85 VESA */
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{ NULL, 85, 800, 600, 17761, 152, 32, 27, 01, 64, 3,
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FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 1024x768-60 VESA */
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{ NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,
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0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 1024x768-75 VESA */
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{ NULL, 75, 1024, 768, 12690, 176, 16, 28, 1, 96, 3,
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FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 1024x768-85 VESA */
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{ NULL, 85, 1024, 768, 10582, 208, 48, 36, 1, 96, 3,
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FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 1280x960-60 VESA */
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{ NULL, 60, 1280, 960, 9259, 312, 96, 36, 1, 112, 3,
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FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 1280x960-85 VESA */
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{ NULL, 85, 1280, 960, 6734, 224, 64, 47, 1, 160, 3,
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FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 1280x1024-60 VESA */
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{ NULL, 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
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FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 1280x1024-75 VESA */
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{ NULL, 75, 1280, 1024, 7407, 248, 16, 38, 1, 144, 3,
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FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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/* 1280x1024-85 VESA */
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{ NULL, 85, 1280, 1024, 6349, 224, 64, 44, 1, 160, 3,
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FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
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};
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static int gx1_line_delta(int xres, int bpp)
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{
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int line_delta = xres * (bpp >> 3);
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if (line_delta > 2048)
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line_delta = 4096;
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else if (line_delta > 1024)
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line_delta = 2048;
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else
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line_delta = 1024;
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return line_delta;
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}
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static int gx1fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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struct geodefb_par *par = info->par;
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/* Maximum resolution is 1280x1024. */
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if (var->xres > 1280 || var->yres > 1024)
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return -EINVAL;
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if (par->panel_x && (var->xres > par->panel_x || var->yres > par->panel_y))
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return -EINVAL;
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/* Only 16 bpp and 8 bpp is supported by the hardware. */
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if (var->bits_per_pixel == 16) {
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var->red.offset = 11; var->red.length = 5;
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var->green.offset = 5; var->green.length = 6;
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var->blue.offset = 0; var->blue.length = 5;
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var->transp.offset = 0; var->transp.length = 0;
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} else if (var->bits_per_pixel == 8) {
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var->red.offset = 0; var->red.length = 8;
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var->green.offset = 0; var->green.length = 8;
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var->blue.offset = 0; var->blue.length = 8;
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var->transp.offset = 0; var->transp.length = 0;
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} else
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return -EINVAL;
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/* Enough video memory? */
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if (gx1_line_delta(var->xres, var->bits_per_pixel) * var->yres > info->fix.smem_len)
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return -EINVAL;
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/* FIXME: Check timing parameters here? */
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return 0;
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}
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static int gx1fb_set_par(struct fb_info *info)
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{
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struct geodefb_par *par = info->par;
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if (info->var.bits_per_pixel == 16)
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info->fix.visual = FB_VISUAL_TRUECOLOR;
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else
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info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
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info->fix.line_length = gx1_line_delta(info->var.xres, info->var.bits_per_pixel);
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par->dc_ops->set_mode(info);
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return 0;
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}
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static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
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{
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chan &= 0xffff;
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chan >>= 16 - bf->length;
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return chan << bf->offset;
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}
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static int gx1fb_setcolreg(unsigned regno, unsigned red, unsigned green,
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unsigned blue, unsigned transp,
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struct fb_info *info)
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{
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struct geodefb_par *par = info->par;
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if (info->var.grayscale) {
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/* grayscale = 0.30*R + 0.59*G + 0.11*B */
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red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
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}
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/* Truecolor has hardware independent palette */
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if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
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u32 *pal = info->pseudo_palette;
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u32 v;
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if (regno >= 16)
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return -EINVAL;
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v = chan_to_field(red, &info->var.red);
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v |= chan_to_field(green, &info->var.green);
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v |= chan_to_field(blue, &info->var.blue);
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pal[regno] = v;
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} else {
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if (regno >= 256)
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return -EINVAL;
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par->dc_ops->set_palette_reg(info, regno, red, green, blue);
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}
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return 0;
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}
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static int gx1fb_blank(int blank_mode, struct fb_info *info)
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{
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struct geodefb_par *par = info->par;
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return par->vid_ops->blank_display(info, blank_mode);
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}
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static int gx1fb_map_video_memory(struct fb_info *info, struct pci_dev *dev)
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{
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struct geodefb_par *par = info->par;
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unsigned gx_base;
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int fb_len;
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int ret;
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gx_base = gx1_gx_base();
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if (!gx_base)
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return -ENODEV;
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ret = pci_enable_device(dev);
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if (ret < 0)
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return ret;
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ret = pci_request_region(dev, 0, "gx1fb (video)");
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if (ret < 0)
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return ret;
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par->vid_regs = pci_ioremap_bar(dev, 0);
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if (!par->vid_regs)
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return -ENOMEM;
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if (!request_mem_region(gx_base + 0x8300, 0x100, "gx1fb (display controller)"))
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return -EBUSY;
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par->dc_regs = ioremap(gx_base + 0x8300, 0x100);
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if (!par->dc_regs)
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return -ENOMEM;
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if ((fb_len = gx1_frame_buffer_size()) < 0)
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return -ENOMEM;
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info->fix.smem_start = gx_base + 0x800000;
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info->fix.smem_len = fb_len;
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info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
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if (!info->screen_base)
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return -ENOMEM;
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dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n",
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info->fix.smem_len / 1024, info->fix.smem_start);
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return 0;
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}
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static int parse_panel_option(struct fb_info *info)
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{
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struct geodefb_par *par = info->par;
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if (strcmp(panel_option, "") != 0) {
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int x, y;
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char *s;
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x = simple_strtol(panel_option, &s, 10);
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if (!x)
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return -EINVAL;
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y = simple_strtol(s + 1, NULL, 10);
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if (!y)
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return -EINVAL;
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par->panel_x = x;
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par->panel_y = y;
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}
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return 0;
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}
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static const struct fb_ops gx1fb_ops = {
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.owner = THIS_MODULE,
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.fb_check_var = gx1fb_check_var,
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.fb_set_par = gx1fb_set_par,
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.fb_setcolreg = gx1fb_setcolreg,
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.fb_blank = gx1fb_blank,
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/* No HW acceleration for now. */
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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};
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static struct fb_info *gx1fb_init_fbinfo(struct device *dev)
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{
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struct geodefb_par *par;
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struct fb_info *info;
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/* Alloc enough space for the pseudo palette. */
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info = framebuffer_alloc(sizeof(struct geodefb_par) + sizeof(u32) * 16, dev);
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if (!info)
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return NULL;
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par = info->par;
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strcpy(info->fix.id, "GX1");
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info->fix.type = FB_TYPE_PACKED_PIXELS;
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info->fix.type_aux = 0;
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info->fix.xpanstep = 0;
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info->fix.ypanstep = 0;
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info->fix.ywrapstep = 0;
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info->fix.accel = FB_ACCEL_NONE;
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info->var.nonstd = 0;
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info->var.activate = FB_ACTIVATE_NOW;
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info->var.height = -1;
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info->var.width = -1;
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info->var.accel_flags = 0;
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info->var.vmode = FB_VMODE_NONINTERLACED;
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info->fbops = &gx1fb_ops;
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info->flags = FBINFO_DEFAULT;
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info->node = -1;
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info->pseudo_palette = (void *)par + sizeof(struct geodefb_par);
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info->var.grayscale = 0;
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/* CRT and panel options */
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par->enable_crt = crt_option;
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if (parse_panel_option(info) < 0)
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printk(KERN_WARNING "gx1fb: invalid 'panel' option -- disabling flat panel\n");
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if (!par->panel_x)
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par->enable_crt = 1; /* fall back to CRT if no panel is specified */
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if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
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framebuffer_release(info);
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return NULL;
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}
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return info;
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}
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static int gx1fb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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{
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struct geodefb_par *par;
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struct fb_info *info;
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int ret;
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ret = aperture_remove_conflicting_pci_devices(pdev, "gx1fb");
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if (ret)
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return ret;
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info = gx1fb_init_fbinfo(&pdev->dev);
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if (!info)
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return -ENOMEM;
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par = info->par;
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/* GX1 display controller and CS5530 video device */
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par->dc_ops = &gx1_dc_ops;
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par->vid_ops = &cs5530_vid_ops;
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if ((ret = gx1fb_map_video_memory(info, pdev)) < 0) {
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dev_err(&pdev->dev, "failed to map frame buffer or controller registers\n");
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goto err;
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}
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ret = fb_find_mode(&info->var, info, mode_option,
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gx1_modedb, ARRAY_SIZE(gx1_modedb), NULL, 16);
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if (ret == 0 || ret == 4) {
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dev_err(&pdev->dev, "could not find valid video mode\n");
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ret = -EINVAL;
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goto err;
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}
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/* Clear the frame buffer of garbage. */
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memset_io(info->screen_base, 0, info->fix.smem_len);
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gx1fb_check_var(&info->var, info);
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gx1fb_set_par(info);
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if (register_framebuffer(info) < 0) {
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ret = -EINVAL;
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goto err;
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}
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pci_set_drvdata(pdev, info);
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fb_info(info, "%s frame buffer device\n", info->fix.id);
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return 0;
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err:
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if (info->screen_base) {
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iounmap(info->screen_base);
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pci_release_region(pdev, 0);
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}
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if (par->vid_regs) {
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iounmap(par->vid_regs);
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pci_release_region(pdev, 1);
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}
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if (par->dc_regs) {
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iounmap(par->dc_regs);
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release_mem_region(gx1_gx_base() + 0x8300, 0x100);
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}
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fb_dealloc_cmap(&info->cmap);
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framebuffer_release(info);
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return ret;
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}
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static void gx1fb_remove(struct pci_dev *pdev)
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{
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struct fb_info *info = pci_get_drvdata(pdev);
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struct geodefb_par *par = info->par;
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unregister_framebuffer(info);
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iounmap((void __iomem *)info->screen_base);
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pci_release_region(pdev, 0);
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iounmap(par->vid_regs);
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pci_release_region(pdev, 1);
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iounmap(par->dc_regs);
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release_mem_region(gx1_gx_base() + 0x8300, 0x100);
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fb_dealloc_cmap(&info->cmap);
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framebuffer_release(info);
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}
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#ifndef MODULE
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static void __init gx1fb_setup(char *options)
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{
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char *this_opt;
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if (!options || !*options)
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return;
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while ((this_opt = strsep(&options, ","))) {
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if (!*this_opt)
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continue;
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if (!strncmp(this_opt, "mode:", 5))
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strscpy(mode_option, this_opt + 5, sizeof(mode_option));
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else if (!strncmp(this_opt, "crt:", 4))
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crt_option = !!simple_strtoul(this_opt + 4, NULL, 0);
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else if (!strncmp(this_opt, "panel:", 6))
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strscpy(panel_option, this_opt + 6, sizeof(panel_option));
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else
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strscpy(mode_option, this_opt, sizeof(mode_option));
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}
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}
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#endif
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static struct pci_device_id gx1fb_id_table[] = {
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{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_VIDEO,
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PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16,
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0xff0000, 0 },
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci, gx1fb_id_table);
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static struct pci_driver gx1fb_driver = {
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.name = "gx1fb",
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.id_table = gx1fb_id_table,
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.probe = gx1fb_probe,
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.remove = gx1fb_remove,
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};
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static int __init gx1fb_init(void)
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{
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#ifndef MODULE
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char *option = NULL;
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#endif
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if (fb_modesetting_disabled("gx1fb"))
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return -ENODEV;
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#ifndef MODULE
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if (fb_get_options("gx1fb", &option))
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return -ENODEV;
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gx1fb_setup(option);
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#endif
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return pci_register_driver(&gx1fb_driver);
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}
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static void gx1fb_cleanup(void)
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{
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pci_unregister_driver(&gx1fb_driver);
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}
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module_init(gx1fb_init);
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module_exit(gx1fb_cleanup);
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module_param_string(mode, mode_option, sizeof(mode_option), 0444);
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MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])");
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module_param_named(crt, crt_option, int, 0444);
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MODULE_PARM_DESC(crt, "enable CRT output. 0 = off, 1 = on (default)");
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module_param_string(panel, panel_option, sizeof(panel_option), 0444);
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MODULE_PARM_DESC(panel, "size of attached flat panel (<x>x<y>)");
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MODULE_DESCRIPTION("framebuffer driver for the AMD Geode GX1");
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MODULE_LICENSE("GPL");
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