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