- 根目录:
- drivers
- video
- igafb.c
/*
* 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;
fb_info(info, "%s frame buffer device at 0x%08lx [%dMB VRAM]\n",
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[] = {
{ 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);