--- /dev/null
+/*
+ * 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);
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