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/*
* linux/drivers/video/igafb.c -- Frame buffer device for IGA 1682
*
* Copyright (C) 1998 Vladimir Roganov and Gleb Raiko
*
* This driver is partly based on the Frame buffer device for ATI Mach64
* and partially on VESA-related code.
*
* Copyright (C) 1997-1998 Geert Uytterhoeven
* Copyright (C) 1998 Bernd Harries
* Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
/******************************************************************************
TODO:
Despite of IGA Card has advanced graphic acceleration,
initial version is almost dummy and does not support it.
Support for video modes and acceleration must be added
together with accelerated X-Windows driver implementation.
Most important thing at this moment is that we have working
JavaEngine1 console & X with new console interface.
******************************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/selection.h>
#include <linux/console.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/nvram.h>
#include <linux/kd.h>
#include <linux/vt_kern.h>
#include <asm/io.h>
#ifdef __sparc__
#include <asm/pbm.h>
#include <asm/pcic.h>
#endif
#include <video/fbcon.h>
#include <video/fbcon-cfb8.h>
#include <video/fbcon-cfb16.h>
#include <video/fbcon-cfb24.h>
#include <video/fbcon-cfb32.h>
#include "iga.h"
static char igafb_name[16] = "IGA 1682";
static char fontname[40] __initdata = { 0 };
struct pci_mmap_map {
unsigned long voff;
unsigned long poff;
unsigned long size;
unsigned long prot_flag;
unsigned long prot_mask;
};
struct fb_info_iga {
struct fb_info fb_info;
unsigned long frame_buffer_phys;
char *frame_buffer;
unsigned long io_base_phys;
unsigned long io_base;
u32 total_vram;
struct pci_mmap_map *mmap_map;
struct { u_short blue, green, red, pad; } palette[256];
int video_cmap_len;
int currcon;
struct display disp;
struct display_switch dispsw;
union {
#ifdef FBCON_HAS_CFB16
u16 cfb16[16];
#endif
#ifdef FBCON_HAS_CFB24
u32 cfb24[16];
#endif
#ifdef FBCON_HAS_CFB32
u32 cfb32[16];
#endif
} fbcon_cmap;
#ifdef __sparc__
u8 open;
u8 mmaped;
int vtconsole;
int consolecnt;
#endif
};
struct fb_var_screeninfo default_var = {
/* 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) */
640, 480, 640, 480, 0, 0, 8, 0,
{0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 39722, 48, 16, 33, 10, 96, 2,
0, FB_VMODE_NONINTERLACED
};
#ifdef __sparc__
struct fb_var_screeninfo default_var_1024x768 __initdata = {
/* 1024x768, 75 Hz, Non-Interlaced (78.75 MHz dotclock) */
1024, 768, 1024, 768, 0, 0, 8, 0,
{0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 12699, 176, 16, 28, 1, 96, 3,
FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
};
struct fb_var_screeninfo default_var_1152x900 __initdata = {
/* 1152x900, 76 Hz, Non-Interlaced (110.0 MHz dotclock) */
1152, 900, 1152, 900, 0, 0, 8, 0,
{0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 9091, 234, 24, 34, 3, 100, 3,
FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
};
struct fb_var_screeninfo default_var_1280x1024 __initdata = {
/* 1280x1024, 75 Hz, Non-Interlaced (135.00 MHz dotclock) */
1280, 1024, 1280, 1024, 0, 0, 8, 0,
{0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 7408, 248, 16, 38, 1, 144, 3,
FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
};
/*
* Memory-mapped I/O functions for Sparc PCI
*
* On sparc we happen to access I/O with memory mapped functions too.
*/
#define pci_inb(info, reg) readb(info->io_base+(reg))
#define pci_outb(info, val, reg) writeb(val, info->io_base+(reg))
static inline unsigned int iga_inb(struct fb_info_iga *info,
unsigned int reg, unsigned int idx )
{
pci_outb(info, idx, reg);
return pci_inb(info, reg + 1);
}
static inline void iga_outb(struct fb_info_iga *info, unsigned char val,
unsigned int reg, unsigned int idx )
{
pci_outb(info, idx, reg);
pci_outb(info, val, reg+1);
}
#endif /* __sparc__ */
/*
* Very important functionality for the JavaEngine1 computer:
* make screen border black (usign special IGA registers)
*/
static void iga_blank_border(struct fb_info_iga *info)
{
int i;
#if 0
/*
* PROM does this for us, so keep this code as a reminder
* about required read from 0x3DA and writing of 0x20 in the end.
*/
(void) pci_inb(info, 0x3DA); /* required for every access */
pci_outb(info, IGA_IDX_VGA_OVERSCAN, IGA_ATTR_CTL);
(void) pci_inb(info, IGA_ATTR_CTL+1);
pci_outb(info, 0x38, IGA_ATTR_CTL);
pci_outb(info, 0x20, IGA_ATTR_CTL); /* re-enable visual */
#endif
/*
* This does not work as it was designed because the overscan
* color is looked up in the palette. Therefore, under X11
* overscan changes color.
*/
for (i=0; i < 3; i++)
iga_outb(info, 0, IGA_EXT_CNTRL, IGA_IDX_OVERSCAN_COLOR + i);
}
/*
* Frame buffer device API
*/
static int igafb_update_var(int con, struct fb_info *info)
{
return 0;
}
static int igafb_get_fix(struct fb_fix_screeninfo *fix, int con,
struct fb_info *info)
{
struct fb_info_iga *fb = (struct fb_info_iga*)info;
memset(fix, 0, sizeof(struct fb_fix_screeninfo));
strcpy(fix->id, igafb_name);
fix->smem_start = (unsigned long) fb->frame_buffer;
fix->smem_len = fb->total_vram;
fix->xpanstep = 0;
fix->ypanstep = 0;
fix->ywrapstep = 0;
fix->type = FB_TYPE_PACKED_PIXELS;
fix->type_aux = 0;
fix->line_length = default_var.xres * (default_var.bits_per_pixel/8);
fix->visual = default_var.bits_per_pixel <= 8 ? FB_VISUAL_PSEUDOCOLOR
: FB_VISUAL_DIRECTCOLOR;
return 0;
}
static int igafb_get_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info)
{
if(con == -1)
memcpy(var, &default_var, sizeof(struct fb_var_screeninfo));
else
*var = fb_display[con].var;
return 0;
}
static int igafb_set_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info)
{
memcpy(var, &default_var, sizeof(struct fb_var_screeninfo));
return 0;
}
#ifdef __sparc__
static int igafb_mmap(struct fb_info *info, struct file *file,
struct vm_area_struct *vma)
{
struct fb_info_iga *fb = (struct fb_info_iga *)info;
unsigned int size, page, map_size = 0;
unsigned long map_offset = 0;
int i;
if (!fb->mmap_map)
return -ENXIO;
size = vma->vm_end - vma->vm_start;
/* To stop the swapper from even considering these pages. */
vma->vm_flags |= (VM_SHM | VM_LOCKED);
/* Each page, see which map applies */
for (page = 0; page < size; ) {
map_size = 0;
for (i = 0; fb->mmap_map[i].size; i++) {
unsigned long start = fb->mmap_map[i].voff;
unsigned long end = start + fb->mmap_map[i].size;
unsigned long offset = (vma->vm_pgoff << PAGE_SHIFT) + page;
if (start > offset)
continue;
if (offset >= end)
continue;
map_size = fb->mmap_map[i].size - (offset - start);
map_offset = fb->mmap_map[i].poff + (offset - start);
break;
}
if (!map_size) {
page += PAGE_SIZE;
continue;
}
if (page + map_size > size)
map_size = size - page;
pgprot_val(vma->vm_page_prot) &= ~(fb->mmap_map[i].prot_mask);
pgprot_val(vma->vm_page_prot) |= fb->mmap_map[i].prot_flag;
if (remap_page_range(vma->vm_start + page, map_offset,
map_size, vma->vm_page_prot))
return -EAGAIN;
page += map_size;
}
if (!map_size)
return -EINVAL;
vma->vm_flags |= VM_IO;
if (!fb->mmaped) {
int lastconsole = 0;
if (info->display_fg)
lastconsole = info->display_fg->vc_num;
fb->mmaped = 1;
if (fb->consolecnt && fb_display[lastconsole].fb_info ==info) {
fb->vtconsole = lastconsole;
vt_cons[lastconsole]->vc_mode = KD_GRAPHICS;
}
}
return 0;
}
#endif /* __sparc__ */
static int iga_getcolreg(unsigned regno, unsigned *red, unsigned *green,
unsigned *blue, unsigned *transp,
struct fb_info *fb_info)
{
/*
* Read a single color register and split it into colors/transparent.
* Return != 0 for invalid regno.
*/
struct fb_info_iga *info = (struct fb_info_iga*) fb_info;
if (regno >= info->video_cmap_len)
return 1;
*red = info->palette[regno].red;
*green = info->palette[regno].green;
*blue = info->palette[regno].blue;
*transp = 0;
return 0;
}
static int iga_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *fb_info)
{
/*
* Set a single color register. The values supplied are
* already rounded down to the hardware's capabilities
* (according to the entries in the `var' structure). Return
* != 0 for invalid regno.
*/
struct fb_info_iga *info = (struct fb_info_iga*) fb_info;
if (regno >= info->video_cmap_len)
return 1;
info->palette[regno].red = red;
info->palette[regno].green = green;
info->palette[regno].blue = blue;
pci_outb(info, regno, DAC_W_INDEX);
pci_outb(info, red, DAC_DATA);
pci_outb(info, green, DAC_DATA);
pci_outb(info, blue, DAC_DATA);
if (regno < 16) {
switch (default_var.bits_per_pixel) {
#ifdef FBCON_HAS_CFB16
case 16:
info->fbcon_cmap.cfb16[regno] =
(regno << 10) | (regno << 5) | regno;
break;
#endif
#ifdef FBCON_HAS_CFB24
case 24:
info->fbcon_cmap.cfb24[regno] =
(regno << 16) | (regno << 8) | regno;
break;
#endif
#ifdef FBCON_HAS_CFB32
case 32:
{ int i;
i = (regno << 8) | regno;
info->fbcon_cmap.cfb32[regno] = (i << 16) | i;
}
break;
#endif
}
}
return 0;
}
static void do_install_cmap(int con, struct fb_info *fb_info)
{
struct fb_info_iga *info = (struct fb_info_iga*) fb_info;
if (con != info->currcon)
return;
if (fb_display[con].cmap.len)
fb_set_cmap(&fb_display[con].cmap, 1,
iga_setcolreg, &info->fb_info);
else
fb_set_cmap(fb_default_cmap(info->video_cmap_len), 1,
iga_setcolreg, &info->fb_info);
}
static int igafb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *fb_info)
{
struct fb_info_iga *info = (struct fb_info_iga*) fb_info;
if (con == info->currcon) /* current console? */
return fb_get_cmap(cmap, kspc, iga_getcolreg, &info->fb_info);
else if (fb_display[con].cmap.len) /* non default colormap? */
fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
else
fb_copy_cmap(fb_default_cmap(info->video_cmap_len),
cmap, kspc ? 0 : 2);
return 0;
}
static int igafb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
int err;
struct fb_info_iga *fb = (struct fb_info_iga*) info;
if (!fb_display[con].cmap.len) { /* no colormap allocated? */
err = fb_alloc_cmap(&fb_display[con].cmap,
fb->video_cmap_len,0);
if (err)
return err;
}
if (con == fb->currcon) /* current console? */
return fb_set_cmap(cmap, kspc, iga_setcolreg, info);
else
fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0 : 1);
return 0;
}
/*
* Framebuffer option structure
*/
static struct fb_ops igafb_ops = {
owner: THIS_MODULE,
fb_get_fix: igafb_get_fix,
fb_get_var: igafb_get_var,
fb_set_var: igafb_set_var,
fb_get_cmap: igafb_get_cmap,
fb_set_cmap: igafb_set_cmap,
#ifdef __sparc__
fb_mmap: igafb_mmap,
#endif
};
static void igafb_set_disp(int con, struct fb_info_iga *info)
{
struct fb_fix_screeninfo fix;
struct display *display;
struct display_switch *sw;
if (con >= 0)
display = &fb_display[con];
else
display = &info->disp; /* used during initialization */
igafb_get_fix(&fix, con, &info->fb_info);
memset(display, 0, sizeof(struct display));
display->screen_base = info->frame_buffer;
display->visual = fix.visual;
display->type = fix.type;
display->type_aux = fix.type_aux;
display->ypanstep = fix.ypanstep;
display->ywrapstep = fix.ywrapstep;
display->line_length = fix.line_length;
display->next_line = fix.line_length;
display->can_soft_blank = 0;
display->inverse = 0;
igafb_get_var(&display->var, -1, &info->fb_info);
switch (default_var.bits_per_pixel) {
#ifdef FBCON_HAS_CFB8
case 8:
sw = &fbcon_cfb8;
break;
#endif
#ifdef FBCON_HAS_CFB16
case 15:
case 16:
sw = &fbcon_cfb16;
display->dispsw_data = info->fbcon_cmap.cfb16;
break;
#endif
#ifdef FBCON_HAS_CFB24
case 24:
sw = &fbcon_cfb24;
display->dispsw_data = info->fbcon_cmap.cfb24;
break;
#endif
#ifdef FBCON_HAS_CFB32
case 32:
sw = &fbcon_cfb32;
display->dispsw_data = info->fbcon_cmap.cfb32;
break;
#endif
default:
printk(KERN_WARNING "igafb_set_disp: unknown resolution %d\n",
default_var.bits_per_pixel);
return;
}
memcpy(&info->dispsw, sw, sizeof(*sw));
display->dispsw = &info->dispsw;
display->scrollmode = SCROLL_YREDRAW;
info->dispsw.bmove = fbcon_redraw_bmove;
}
static int igafb_switch(int con, struct fb_info *fb_info)
{
struct fb_info_iga *info = (struct fb_info_iga*) fb_info;
/* Do we have to save the colormap? */
if (fb_display[info->currcon].cmap.len)
fb_get_cmap(&fb_display[info->currcon].cmap, 1,
iga_getcolreg, fb_info);
info->currcon = con;
/* Install new colormap */
do_install_cmap(con, fb_info);
igafb_update_var(con, fb_info);
return 1;
}
/* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */
static void igafb_blank(int blank, struct fb_info *info)
{
/* Not supported */
}
static int __init iga_init(struct fb_info_iga *info)
{
char vramsz = iga_inb(info, IGA_EXT_CNTRL, IGA_IDX_EXT_BUS_CNTL)
& MEM_SIZE_ALIAS;
switch (vramsz) {
case MEM_SIZE_1M:
info->total_vram = 0x100000;
break;
case MEM_SIZE_2M:
info->total_vram = 0x200000;
break;
case MEM_SIZE_4M:
case MEM_SIZE_RESERVED:
info->total_vram = 0x400000;
break;
}
if (default_var.bits_per_pixel > 8) {
info->video_cmap_len = 16;
} else {
info->video_cmap_len = 256;
}
{
int j, k;
for (j = 0; j < 16; j++) {
k = color_table[j];
info->palette[j].red = default_red[k];
info->palette[j].green = default_grn[k];
info->palette[j].blue = default_blu[k];
}
}
strcpy(info->fb_info.modename, igafb_name);
info->fb_info.node = -1;
info->fb_info.fbops = &igafb_ops;
info->fb_info.disp = &info->disp;
strcpy(info->fb_info.fontname, fontname);
info->fb_info.changevar = NULL;
info->fb_info.switch_con = &igafb_switch;
info->fb_info.updatevar = &igafb_update_var;
info->fb_info.blank = &igafb_blank;
info->fb_info.flags=FBINFO_FLAG_DEFAULT;
igafb_set_disp(-1, info);
if (register_framebuffer(&info->fb_info) < 0)
return 0;
printk("fb%d: %s frame buffer device at 0x%08lx [%dMB VRAM]\n",
GET_FB_IDX(info->fb_info.node), igafb_name,
info->frame_buffer_phys, info->total_vram >> 20);
iga_blank_border(info);
return 1;
}
int __init igafb_init(void)
{
struct pci_dev *pdev;
struct fb_info_iga *info;
unsigned long addr;
extern int con_is_present(void);
int iga2000 = 0;
/* Do not attach when we have a serial console. */
if (!con_is_present())
return -ENXIO;
pdev = pci_find_device(PCI_VENDOR_ID_INTERG,
PCI_DEVICE_ID_INTERG_1682, 0);
if (pdev == NULL) {
/*
* XXX We tried to use cyber2000fb.c for IGS 2000.
* But it does not initialize the chip in JavaStation-E, alas.
*/
pdev = pci_find_device(PCI_VENDOR_ID_INTERG, 0x2000, 0);
if(pdev == NULL) {
return -ENXIO;
}
iga2000 = 1;
}
info = kmalloc(sizeof(struct fb_info_iga), GFP_ATOMIC);
if (!info) {
printk("igafb_init: can't alloc fb_info_iga\n");
return -ENOMEM;
}
memset(info, 0, sizeof(struct fb_info_iga));
if ((addr = pdev->resource[0].start) == 0) {
printk("igafb_init: no memory start\n");
kfree(info);
return -ENXIO;
}
if ((info->frame_buffer = ioremap(addr, 1024*1024*2)) == 0) {
printk("igafb_init: can't remap %lx[2M]\n", addr);
kfree(info);
return -ENXIO;
}
info->frame_buffer_phys = addr & PCI_BASE_ADDRESS_MEM_MASK;
#ifdef __sparc__
/*
* The following is sparc specific and this is why:
*
* IGS2000 has its I/O memory mapped and we want
* to generate memory cycles on PCI, e.g. do ioremap(),
* then readb/writeb() as in Documentation/IO-mapping.txt.
*
* IGS1682 is more traditional, it responds to PCI I/O
* cycles, so we want to access it with inb()/outb().
*
* On sparc, PCIC converts CPU memory access within
* phys window 0x3000xxxx into PCI I/O cycles. Therefore
* we may use readb/writeb to access them with IGS1682.
*
* We do not take io_base_phys from resource[n].start
* on IGS1682 because that chip is BROKEN. It does not
* have a base register for I/O. We just "know" what its
* I/O addresses are.
*/
if (iga2000) {
info->io_base_phys = info->frame_buffer_phys | 0x00800000;
} else {
info->io_base_phys = 0x30000000; /* XXX */
}
if ((info->io_base = (int) ioremap(info->io_base_phys, 0x1000)) == 0) {
printk("igafb_init: can't remap %lx[4K]\n", info->io_base_phys);
iounmap((void *)info->frame_buffer);
kfree(info);
return -ENXIO;
}
/*
* Figure mmap addresses from PCI config space.
* We need two regions: for video memory and for I/O ports.
* Later one can add region for video coprocessor registers.
* However, mmap routine loops until size != 0, so we put
* one additional region with size == 0.
*/
info->mmap_map = kmalloc(4 * sizeof(*info->mmap_map), GFP_ATOMIC);
if (!info->mmap_map) {
printk("igafb_init: can't alloc mmap_map\n");
iounmap((void *)info->io_base);
iounmap(info->frame_buffer);
kfree(info);
return -ENOMEM;
}
memset(info->mmap_map, 0, 4 * sizeof(*info->mmap_map));
/*
* Set default vmode and cmode from PROM properties.
*/
{
struct pcidev_cookie *cookie = pdev->sysdata;
int node = cookie->prom_node;
int width = prom_getintdefault(node, "width", 1024);
int height = prom_getintdefault(node, "height", 768);
int depth = prom_getintdefault(node, "depth", 8);
switch (width) {
case 1024:
if (height == 768)
default_var = default_var_1024x768;
break;
case 1152:
if (height == 900)
default_var = default_var_1152x900;
break;
case 1280:
if (height == 1024)
default_var = default_var_1280x1024;
break;
default:
break;
}
switch (depth) {
case 8:
default_var.bits_per_pixel = 8;
break;
case 16:
default_var.bits_per_pixel = 16;
break;
case 24:
default_var.bits_per_pixel = 24;
break;
case 32:
default_var.bits_per_pixel = 32;
break;
default:
break;
}
}
#endif
if (!iga_init(info)) {
iounmap((void *)info->io_base);
iounmap(info->frame_buffer);
if (info->mmap_map)
kfree(info->mmap_map);
kfree(info);
}
#ifdef __sparc__
/*
* Add /dev/fb mmap values.
*/
/* First region is for video memory */
info->mmap_map[0].voff = 0x0;
info->mmap_map[0].poff = info->frame_buffer_phys & PAGE_MASK;
info->mmap_map[0].size = info->total_vram & PAGE_MASK;
info->mmap_map[0].prot_mask = SRMMU_CACHE;
info->mmap_map[0].prot_flag = SRMMU_WRITE;
/* Second region is for I/O ports */
info->mmap_map[1].voff = info->frame_buffer_phys & PAGE_MASK;
info->mmap_map[1].poff = info->io_base_phys & PAGE_MASK;
info->mmap_map[1].size = PAGE_SIZE * 2; /* X wants 2 pages */
info->mmap_map[1].prot_mask = SRMMU_CACHE;
info->mmap_map[1].prot_flag = SRMMU_WRITE;
#endif /* __sparc__ */
return 0;
}
int __init igafb_setup(char *options)
{
char *this_opt;
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!strncmp(this_opt, "font:", 5)) {
char *p;
int i;
p = this_opt + 5;
for (i = 0; i < sizeof(fontname) - 1; i++)
if (!*p || *p == ' ' || *p == ',')
break;
memcpy(fontname, this_opt + 5, i);
fontname[i] = 0;
}
}
return 0;
}
MODULE_LICENSE("GPL");
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