2 * linux/drivers/video/igafb.c -- Frame buffer device for IGA 1682
4 * Copyright (C) 1998 Vladimir Roganov and Gleb Raiko
6 * This driver is partly based on the Frame buffer device for ATI Mach64
7 * and partially on VESA-related code.
9 * Copyright (C) 1997-1998 Geert Uytterhoeven
10 * Copyright (C) 1998 Bernd Harries
11 * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
13 * This file is subject to the terms and conditions of the GNU General Public
14 * License. See the file COPYING in the main directory of this archive for
18 /******************************************************************************
21 Despite of IGA Card has advanced graphic acceleration,
22 initial version is almost dummy and does not support it.
23 Support for video modes and acceleration must be added
24 together with accelerated X-Windows driver implementation.
26 Most important thing at this moment is that we have working
27 JavaEngine1 console & X with new console interface.
29 ******************************************************************************/
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/errno.h>
34 #include <linux/string.h>
36 #include <linux/slab.h>
37 #include <linux/vmalloc.h>
38 #include <linux/delay.h>
39 #include <linux/interrupt.h>
41 #include <linux/init.h>
42 #include <linux/pci.h>
43 #include <linux/nvram.h>
52 #include <video/iga.h>
58 unsigned long prot_flag;
59 unsigned long prot_mask;
63 struct pci_mmap_map *mmap_map;
64 unsigned long frame_buffer_phys;
65 unsigned long io_base;
68 struct fb_info fb_info;
70 struct fb_fix_screeninfo igafb_fix __initdata = {
72 .type = FB_TYPE_PACKED_PIXELS,
76 struct fb_var_screeninfo default_var = {
77 /* 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) */
88 .accel_flags = FB_ACCEL_NONE,
96 .vmode = FB_VMODE_NONINTERLACED
100 struct fb_var_screeninfo default_var_1024x768 __initdata = {
101 /* 1024x768, 75 Hz, Non-Interlaced (78.75 MHz dotclock) */
104 .xres_virtual = 1024,
112 .accel_flags = FB_ACCEL_NONE,
120 .vmode = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
123 struct fb_var_screeninfo default_var_1152x900 __initdata = {
124 /* 1152x900, 76 Hz, Non-Interlaced (110.0 MHz dotclock) */
127 .xres_virtual = 1152,
131 .green = { 0, 8, 0 },
135 .accel_flags = FB_ACCEL_NONE,
143 .vmode = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
146 struct fb_var_screeninfo default_var_1280x1024 __initdata = {
147 /* 1280x1024, 75 Hz, Non-Interlaced (135.00 MHz dotclock) */
150 .xres_virtual = 1280,
151 .yres_virtual = 1024,
166 .vmode = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
170 * Memory-mapped I/O functions for Sparc PCI
172 * On sparc we happen to access I/O with memory mapped functions too.
174 #define pci_inb(par, reg) readb(par->io_base+(reg))
175 #define pci_outb(par, val, reg) writeb(val, par->io_base+(reg))
177 static inline unsigned int iga_inb(struct iga_par *par, unsigned int reg,
180 pci_outb(par, idx, reg);
181 return pci_inb(par, reg + 1);
184 static inline void iga_outb(struct iga_par *par, unsigned char val,
185 unsigned int reg, unsigned int idx )
187 pci_outb(par, idx, reg);
188 pci_outb(par, val, reg+1);
191 #endif /* CONFIG_SPARC */
194 * Very important functionality for the JavaEngine1 computer:
195 * make screen border black (usign special IGA registers)
197 static void iga_blank_border(struct iga_par *par)
202 * PROM does this for us, so keep this code as a reminder
203 * about required read from 0x3DA and writing of 0x20 in the end.
205 (void) pci_inb(par, 0x3DA); /* required for every access */
206 pci_outb(par, IGA_IDX_VGA_OVERSCAN, IGA_ATTR_CTL);
207 (void) pci_inb(par, IGA_ATTR_CTL+1);
208 pci_outb(par, 0x38, IGA_ATTR_CTL);
209 pci_outb(par, 0x20, IGA_ATTR_CTL); /* re-enable visual */
212 * This does not work as it was designed because the overscan
213 * color is looked up in the palette. Therefore, under X11
214 * overscan changes color.
216 for (i=0; i < 3; i++)
217 iga_outb(par, 0, IGA_EXT_CNTRL, IGA_IDX_OVERSCAN_COLOR + i);
221 static int igafb_mmap(struct fb_info *info,
222 struct vm_area_struct *vma)
224 struct iga_par *par = (struct iga_par *)info->par;
225 unsigned int size, page, map_size = 0;
226 unsigned long map_offset = 0;
232 size = vma->vm_end - vma->vm_start;
234 /* Each page, see which map applies */
235 for (page = 0; page < size; ) {
237 for (i = 0; par->mmap_map[i].size; i++) {
238 unsigned long start = par->mmap_map[i].voff;
239 unsigned long end = start + par->mmap_map[i].size;
240 unsigned long offset = (vma->vm_pgoff << PAGE_SHIFT) + page;
247 map_size = par->mmap_map[i].size - (offset - start);
248 map_offset = par->mmap_map[i].poff + (offset - start);
255 if (page + map_size > size)
256 map_size = size - page;
258 pgprot_val(vma->vm_page_prot) &= ~(par->mmap_map[i].prot_mask);
259 pgprot_val(vma->vm_page_prot) |= par->mmap_map[i].prot_flag;
261 if (remap_pfn_range(vma, vma->vm_start + page,
262 map_offset >> PAGE_SHIFT, map_size, vma->vm_page_prot))
271 vma->vm_flags |= VM_IO;
274 #endif /* CONFIG_SPARC */
276 static int igafb_setcolreg(unsigned regno, unsigned red, unsigned green,
277 unsigned blue, unsigned transp,
278 struct fb_info *info)
281 * Set a single color register. The values supplied are
282 * already rounded down to the hardware's capabilities
283 * (according to the entries in the `var' structure). Return
284 * != 0 for invalid regno.
286 struct iga_par *par = (struct iga_par *)info->par;
288 if (regno >= info->cmap.len)
291 pci_outb(par, regno, DAC_W_INDEX);
292 pci_outb(par, red, DAC_DATA);
293 pci_outb(par, green, DAC_DATA);
294 pci_outb(par, blue, DAC_DATA);
297 switch (info->var.bits_per_pixel) {
299 ((u16*)(info->pseudo_palette))[regno] =
300 (regno << 10) | (regno << 5) | regno;
303 ((u32*)(info->pseudo_palette))[regno] =
304 (regno << 16) | (regno << 8) | regno;
308 i = (regno << 8) | regno;
309 ((u32*)(info->pseudo_palette))[regno] = (i << 16) | i;
318 * Framebuffer option structure
320 static struct fb_ops igafb_ops = {
321 .owner = THIS_MODULE,
322 .fb_setcolreg = igafb_setcolreg,
323 .fb_fillrect = cfb_fillrect,
324 .fb_copyarea = cfb_copyarea,
325 .fb_imageblit = cfb_imageblit,
327 .fb_mmap = igafb_mmap,
331 static int __init iga_init(struct fb_info *info, struct iga_par *par)
333 char vramsz = iga_inb(par, IGA_EXT_CNTRL, IGA_IDX_EXT_BUS_CNTL)
339 info->fix.smem_len = 0x100000;
342 info->fix.smem_len = 0x200000;
345 case MEM_SIZE_RESERVED:
346 info->fix.smem_len = 0x400000;
350 if (info->var.bits_per_pixel > 8)
353 video_cmap_len = 256;
355 info->fbops = &igafb_ops;
356 info->flags = FBINFO_DEFAULT;
358 fb_alloc_cmap(&info->cmap, video_cmap_len, 0);
360 if (register_framebuffer(info) < 0)
363 printk("fb%d: %s frame buffer device at 0x%08lx [%dMB VRAM]\n",
364 info->node, info->fix.id,
365 par->frame_buffer_phys, info->fix.smem_len >> 20);
367 iga_blank_border(par);
371 int __init igafb_init(void)
373 struct fb_info *info;
374 struct pci_dev *pdev;
377 int size, iga2000 = 0;
379 if (fb_get_options("igafb", NULL))
382 pdev = pci_get_device(PCI_VENDOR_ID_INTERG,
383 PCI_DEVICE_ID_INTERG_1682, 0);
386 * XXX We tried to use cyber2000fb.c for IGS 2000.
387 * But it does not initialize the chip in JavaStation-E, alas.
389 pdev = pci_get_device(PCI_VENDOR_ID_INTERG, 0x2000, 0);
395 /* We leak a reference here but as it cannot be unloaded this is
396 fine. If you write unload code remember to free it in unload */
398 size = sizeof(struct fb_info) + sizeof(struct iga_par) + sizeof(u32)*16;
400 info = kzalloc(size, GFP_ATOMIC);
402 printk("igafb_init: can't alloc fb_info\n");
407 par = (struct iga_par *) (info + 1);
410 if ((addr = pdev->resource[0].start) == 0) {
411 printk("igafb_init: no memory start\n");
417 if ((info->screen_base = ioremap(addr, 1024*1024*2)) == 0) {
418 printk("igafb_init: can't remap %lx[2M]\n", addr);
424 par->frame_buffer_phys = addr & PCI_BASE_ADDRESS_MEM_MASK;
428 * The following is sparc specific and this is why:
430 * IGS2000 has its I/O memory mapped and we want
431 * to generate memory cycles on PCI, e.g. do ioremap(),
432 * then readb/writeb() as in Documentation/IO-mapping.txt.
434 * IGS1682 is more traditional, it responds to PCI I/O
435 * cycles, so we want to access it with inb()/outb().
437 * On sparc, PCIC converts CPU memory access within
438 * phys window 0x3000xxxx into PCI I/O cycles. Therefore
439 * we may use readb/writeb to access them with IGS1682.
441 * We do not take io_base_phys from resource[n].start
442 * on IGS1682 because that chip is BROKEN. It does not
443 * have a base register for I/O. We just "know" what its
447 igafb_fix.mmio_start = par->frame_buffer_phys | 0x00800000;
449 igafb_fix.mmio_start = 0x30000000; /* XXX */
451 if ((par->io_base = (int) ioremap(igafb_fix.mmio_start, igafb_fix.smem_len)) == 0) {
452 printk("igafb_init: can't remap %lx[4K]\n", igafb_fix.mmio_start);
453 iounmap((void *)info->screen_base);
460 * Figure mmap addresses from PCI config space.
461 * We need two regions: for video memory and for I/O ports.
462 * Later one can add region for video coprocessor registers.
463 * However, mmap routine loops until size != 0, so we put
464 * one additional region with size == 0.
467 par->mmap_map = kzalloc(4 * sizeof(*par->mmap_map), GFP_ATOMIC);
468 if (!par->mmap_map) {
469 printk("igafb_init: can't alloc mmap_map\n");
470 iounmap((void *)par->io_base);
471 iounmap(info->screen_base);
478 * Set default vmode and cmode from PROM properties.
481 struct device_node *dp = pci_device_to_OF_node(pdev);
483 int width = prom_getintdefault(node, "width", 1024);
484 int height = prom_getintdefault(node, "height", 768);
485 int depth = prom_getintdefault(node, "depth", 8);
489 default_var = default_var_1024x768;
493 default_var = default_var_1152x900;
497 default_var = default_var_1280x1024;
505 default_var.bits_per_pixel = 8;
508 default_var.bits_per_pixel = 16;
511 default_var.bits_per_pixel = 24;
514 default_var.bits_per_pixel = 32;
522 igafb_fix.smem_start = (unsigned long) info->screen_base;
523 igafb_fix.line_length = default_var.xres*(default_var.bits_per_pixel/8);
524 igafb_fix.visual = default_var.bits_per_pixel <= 8 ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
526 info->var = default_var;
527 info->fix = igafb_fix;
528 info->pseudo_palette = (void *)(par + 1);
529 info->device = &pdev->dev;
531 if (!iga_init(info, par)) {
532 iounmap((void *)par->io_base);
533 iounmap(info->screen_base);
534 kfree(par->mmap_map);
540 * Add /dev/fb mmap values.
543 /* First region is for video memory */
544 par->mmap_map[0].voff = 0x0;
545 par->mmap_map[0].poff = par->frame_buffer_phys & PAGE_MASK;
546 par->mmap_map[0].size = info->fix.smem_len & PAGE_MASK;
547 par->mmap_map[0].prot_mask = SRMMU_CACHE;
548 par->mmap_map[0].prot_flag = SRMMU_WRITE;
550 /* Second region is for I/O ports */
551 par->mmap_map[1].voff = par->frame_buffer_phys & PAGE_MASK;
552 par->mmap_map[1].poff = info->fix.smem_start & PAGE_MASK;
553 par->mmap_map[1].size = PAGE_SIZE * 2; /* X wants 2 pages */
554 par->mmap_map[1].prot_mask = SRMMU_CACHE;
555 par->mmap_map[1].prot_flag = SRMMU_WRITE;
556 #endif /* CONFIG_SPARC */
561 int __init igafb_setup(char *options)
565 if (!options || !*options)
568 while ((this_opt = strsep(&options, ",")) != NULL) {
573 module_init(igafb_init);
574 MODULE_LICENSE("GPL");
575 static struct pci_device_id igafb_pci_tbl[] __devinitdata = {
576 { PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_1682,
577 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
581 MODULE_DEVICE_TABLE(pci, igafb_pci_tbl);