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linux/drivers/video/igafb.c
Paul Bolle 395cf9691d doc: fix broken references 
There are numerous broken references to Documentation files (in other
Documentation files, in comments, etc.). These broken references are
caused by typo's in the references, and by renames or removals of the
Documentation files. Some broken references are simply odd.

Fix these broken references, sometimes by dropping the irrelevant text
they were part of.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-09-27 18:08:04 +02:00

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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/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/nvram.h>
#include <asm/io.h>
#ifdef CONFIG_SPARC
#include <asm/prom.h>
#include <asm/pcic.h>
#endif
#include <video/iga.h>
struct pci_mmap_map {
unsigned long voff;
unsigned long poff;
unsigned long size;
unsigned long prot_flag;
unsigned long prot_mask;
};
struct iga_par {
struct pci_mmap_map *mmap_map;
unsigned long frame_buffer_phys;
unsigned long io_base;
};
struct fb_info fb_info;
struct fb_fix_screeninfo igafb_fix __initdata = {
.id = "IGA 1682",
.type = FB_TYPE_PACKED_PIXELS,
.mmio_len = 1000
};
struct fb_var_screeninfo default_var = {
/* 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) */
.xres = 640,
.yres = 480,
.xres_virtual = 640,
.yres_virtual = 480,
.bits_per_pixel = 8,
.red = {0, 8, 0 },
.green = {0, 8, 0 },
.blue = {0, 8, 0 },
.height = -1,
.width = -1,
.accel_flags = FB_ACCEL_NONE,
.pixclock = 39722,
.left_margin = 48,
.right_margin = 16,
.upper_margin = 33,
.lower_margin = 10,
.hsync_len = 96,
.vsync_len = 2,
.vmode = FB_VMODE_NONINTERLACED
};
#ifdef CONFIG_SPARC
struct fb_var_screeninfo default_var_1024x768 __initdata = {
/* 1024x768, 75 Hz, Non-Interlaced (78.75 MHz dotclock) */
.xres = 1024,
.yres = 768,
.xres_virtual = 1024,
.yres_virtual = 768,
.bits_per_pixel = 8,
.red = {0, 8, 0 },
.green = {0, 8, 0 },
.blue = {0, 8, 0 },
.height = -1,
.width = -1,
.accel_flags = FB_ACCEL_NONE,
.pixclock = 12699,
.left_margin = 176,
.right_margin = 16,
.upper_margin = 28,
.lower_margin = 1,
.hsync_len = 96,
.vsync_len = 3,
.vmode = 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) */
.xres = 1152,
.yres = 900,
.xres_virtual = 1152,
.yres_virtual = 900,
.bits_per_pixel = 8,
.red = { 0, 8, 0 },
.green = { 0, 8, 0 },
.blue = { 0, 8, 0 },
.height = -1,
.width = -1,
.accel_flags = FB_ACCEL_NONE,
.pixclock = 9091,
.left_margin = 234,
.right_margin = 24,
.upper_margin = 34,
.lower_margin = 3,
.hsync_len = 100,
.vsync_len = 3,
.vmode = 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) */
.xres = 1280,
.yres = 1024,
.xres_virtual = 1280,
.yres_virtual = 1024,
.bits_per_pixel = 8,
.red = {0, 8, 0 },
.green = {0, 8, 0 },
.blue = {0, 8, 0 },
.height = -1,
.width = -1,
.accel_flags = 0,
.pixclock = 7408,
.left_margin = 248,
.right_margin = 16,
.upper_margin = 38,
.lower_margin = 1,
.hsync_len = 144,
.vsync_len = 3,
.vmode = 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(par, reg) readb(par->io_base+(reg))
#define pci_outb(par, val, reg) writeb(val, par->io_base+(reg))
static inline unsigned int iga_inb(struct iga_par *par, unsigned int reg,
unsigned int idx)
{
pci_outb(par, idx, reg);
return pci_inb(par, reg + 1);
}
static inline void iga_outb(struct iga_par *par, unsigned char val,
unsigned int reg, unsigned int idx )
{
pci_outb(par, idx, reg);
pci_outb(par, val, reg+1);
}
#endif /* CONFIG_SPARC */
/*
* Very important functionality for the JavaEngine1 computer:
* make screen border black (usign special IGA registers)
*/
static void iga_blank_border(struct iga_par *par)
{
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(par, 0x3DA); /* required for every access */
pci_outb(par, IGA_IDX_VGA_OVERSCAN, IGA_ATTR_CTL);
(void) pci_inb(par, IGA_ATTR_CTL+1);
pci_outb(par, 0x38, IGA_ATTR_CTL);
pci_outb(par, 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(par, 0, IGA_EXT_CNTRL, IGA_IDX_OVERSCAN_COLOR + i);
}
#ifdef CONFIG_SPARC
static int igafb_mmap(struct fb_info *info,
struct vm_area_struct *vma)
{
struct iga_par *par = (struct iga_par *)info->par;
unsigned int size, page, map_size = 0;
unsigned long map_offset = 0;
int i;
if (!par->mmap_map)
return -ENXIO;
size = vma->vm_end - vma->vm_start;
/* Each page, see which map applies */
for (page = 0; page < size; ) {
map_size = 0;
for (i = 0; par->mmap_map[i].size; i++) {
unsigned long start = par->mmap_map[i].voff;
unsigned long end = start + par->mmap_map[i].size;
unsigned long offset = (vma->vm_pgoff << PAGE_SHIFT) + page;
if (start > offset)
continue;
if (offset >= end)
continue;
map_size = par->mmap_map[i].size - (offset - start);
map_offset = par->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) &= ~(par->mmap_map[i].prot_mask);
pgprot_val(vma->vm_page_prot) |= par->mmap_map[i].prot_flag;
if (remap_pfn_range(vma, vma->vm_start + page,
map_offset >> PAGE_SHIFT, map_size, vma->vm_page_prot))
return -EAGAIN;
page += map_size;
}
if (!map_size)
return -EINVAL;
vma->vm_flags |= VM_IO;
return 0;
}
#endif /* CONFIG_SPARC */
static int igafb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *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 iga_par *par = (struct iga_par *)info->par;
if (regno >= info->cmap.len)
return 1;
pci_outb(par, regno, DAC_W_INDEX);
pci_outb(par, red, DAC_DATA);
pci_outb(par, green, DAC_DATA);
pci_outb(par, blue, DAC_DATA);
if (regno < 16) {
switch (info->var.bits_per_pixel) {
case 16:
((u16*)(info->pseudo_palette))[regno] =
(regno << 10) | (regno << 5) | regno;
break;
case 24:
((u32*)(info->pseudo_palette))[regno] =
(regno << 16) | (regno << 8) | regno;
break;
case 32:
{ int i;
i = (regno << 8) | regno;
((u32*)(info->pseudo_palette))[regno] = (i << 16) | i;
}
break;
}
}
return 0;
}
/*
* Framebuffer option structure
*/
static struct fb_ops igafb_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = igafb_setcolreg,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
#ifdef CONFIG_SPARC
.fb_mmap = igafb_mmap,
#endif
};
static int __init iga_init(struct fb_info *info, struct iga_par *par)
{
char vramsz = iga_inb(par, IGA_EXT_CNTRL, IGA_IDX_EXT_BUS_CNTL)
& MEM_SIZE_ALIAS;
int video_cmap_len;
switch (vramsz) {
case MEM_SIZE_1M:
info->fix.smem_len = 0x100000;
break;
case MEM_SIZE_2M:
info->fix.smem_len = 0x200000;
break;
case MEM_SIZE_4M:
case MEM_SIZE_RESERVED:
info->fix.smem_len = 0x400000;
break;
}
if (info->var.bits_per_pixel > 8)
video_cmap_len = 16;
else
video_cmap_len = 256;
info->fbops = &igafb_ops;
info->flags = FBINFO_DEFAULT;
fb_alloc_cmap(&info->cmap, video_cmap_len, 0);
if (register_framebuffer(info) < 0)
return 0;
printk("fb%d: %s frame buffer device at 0x%08lx [%dMB VRAM]\n",
info->node, info->fix.id,
par->frame_buffer_phys, info->fix.smem_len >> 20);
iga_blank_border(par);
return 1;
}
static int __init igafb_init(void)
{
struct fb_info *info;
struct pci_dev *pdev;
struct iga_par *par;
unsigned long addr;
int size, iga2000 = 0;
if (fb_get_options("igafb", NULL))
return -ENODEV;
pdev = pci_get_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_get_device(PCI_VENDOR_ID_INTERG, 0x2000, 0);
if(pdev == NULL) {
return -ENXIO;
}
iga2000 = 1;
}
/* We leak a reference here but as it cannot be unloaded this is
fine. If you write unload code remember to free it in unload */
size = sizeof(struct iga_par) + sizeof(u32)*16;
info = framebuffer_alloc(size, &pdev->dev);
if (!info) {
printk("igafb_init: can't alloc fb_info\n");
pci_dev_put(pdev);
return -ENOMEM;
}
par = info->par;
if ((addr = pdev->resource[0].start) == 0) {
printk("igafb_init: no memory start\n");
kfree(info);
pci_dev_put(pdev);
return -ENXIO;
}
if ((info->screen_base = ioremap(addr, 1024*1024*2)) == 0) {
printk("igafb_init: can't remap %lx[2M]\n", addr);
kfree(info);
pci_dev_put(pdev);
return -ENXIO;
}
par->frame_buffer_phys = addr & PCI_BASE_ADDRESS_MEM_MASK;
#ifdef CONFIG_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) {
igafb_fix.mmio_start = par->frame_buffer_phys | 0x00800000;
} else {
igafb_fix.mmio_start = 0x30000000; /* XXX */
}
if ((par->io_base = (int) ioremap(igafb_fix.mmio_start, igafb_fix.smem_len)) == 0) {
printk("igafb_init: can't remap %lx[4K]\n", igafb_fix.mmio_start);
iounmap((void *)info->screen_base);
kfree(info);
pci_dev_put(pdev);
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.
*/
par->mmap_map = kzalloc(4 * sizeof(*par->mmap_map), GFP_ATOMIC);
if (!par->mmap_map) {
printk("igafb_init: can't alloc mmap_map\n");
iounmap((void *)par->io_base);
iounmap(info->screen_base);
kfree(info);
pci_dev_put(pdev);
return -ENOMEM;
}
/*
* Set default vmode and cmode from PROM properties.
*/
{
struct device_node *dp = pci_device_to_OF_node(pdev);
int node = dp->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
igafb_fix.smem_start = (unsigned long) info->screen_base;
igafb_fix.line_length = default_var.xres*(default_var.bits_per_pixel/8);
igafb_fix.visual = default_var.bits_per_pixel <= 8 ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
info->var = default_var;
info->fix = igafb_fix;
info->pseudo_palette = (void *)(par + 1);
if (!iga_init(info, par)) {
iounmap((void *)par->io_base);
iounmap(info->screen_base);
kfree(par->mmap_map);
kfree(info);
return -ENODEV;
}
#ifdef CONFIG_SPARC
/*
* Add /dev/fb mmap values.
*/
/* First region is for video memory */
par->mmap_map[0].voff = 0x0;
par->mmap_map[0].poff = par->frame_buffer_phys & PAGE_MASK;
par->mmap_map[0].size = info->fix.smem_len & PAGE_MASK;
par->mmap_map[0].prot_mask = SRMMU_CACHE;
par->mmap_map[0].prot_flag = SRMMU_WRITE;
/* Second region is for I/O ports */
par->mmap_map[1].voff = par->frame_buffer_phys & PAGE_MASK;
par->mmap_map[1].poff = info->fix.smem_start & PAGE_MASK;
par->mmap_map[1].size = PAGE_SIZE * 2; /* X wants 2 pages */
par->mmap_map[1].prot_mask = SRMMU_CACHE;
par->mmap_map[1].prot_flag = SRMMU_WRITE;
#endif /* CONFIG_SPARC */
return 0;
}
static int __init igafb_setup(char *options)
{
char *this_opt;
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
}
return 0;
}
module_init(igafb_init);
MODULE_LICENSE("GPL");
static struct pci_device_id igafb_pci_tbl[] __devinitdata = {
{ PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_1682,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ }
};
MODULE_DEVICE_TABLE(pci, igafb_pci_tbl);
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