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/tty.h>
37 #include <linux/slab.h>
38 #include <linux/vmalloc.h>
39 #include <linux/delay.h>
40 #include <linux/interrupt.h>
42 #include <linux/init.h>
43 #include <linux/pci.h>
44 #include <linux/nvram.h>
53 #include <video/iga.h>
59 unsigned long prot_flag;
60 unsigned long prot_mask;
64 struct pci_mmap_map *mmap_map;
65 unsigned long frame_buffer_phys;
66 unsigned long io_base;
69 struct fb_info fb_info;
71 struct fb_fix_screeninfo igafb_fix __initdata = {
73 .type = FB_TYPE_PACKED_PIXELS,
77 struct fb_var_screeninfo default_var = {
78 /* 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) */
89 .accel_flags = FB_ACCEL_NONE,
97 .vmode = FB_VMODE_NONINTERLACED
101 struct fb_var_screeninfo default_var_1024x768 __initdata = {
102 /* 1024x768, 75 Hz, Non-Interlaced (78.75 MHz dotclock) */
105 .xres_virtual = 1024,
113 .accel_flags = FB_ACCEL_NONE,
121 .vmode = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
124 struct fb_var_screeninfo default_var_1152x900 __initdata = {
125 /* 1152x900, 76 Hz, Non-Interlaced (110.0 MHz dotclock) */
128 .xres_virtual = 1152,
132 .green = { 0, 8, 0 },
136 .accel_flags = FB_ACCEL_NONE,
144 .vmode = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
147 struct fb_var_screeninfo default_var_1280x1024 __initdata = {
148 /* 1280x1024, 75 Hz, Non-Interlaced (135.00 MHz dotclock) */
151 .xres_virtual = 1280,
152 .yres_virtual = 1024,
167 .vmode = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
171 * Memory-mapped I/O functions for Sparc PCI
173 * On sparc we happen to access I/O with memory mapped functions too.
175 #define pci_inb(par, reg) readb(par->io_base+(reg))
176 #define pci_outb(par, val, reg) writeb(val, par->io_base+(reg))
178 static inline unsigned int iga_inb(struct iga_par *par, unsigned int reg,
181 pci_outb(par, idx, reg);
182 return pci_inb(par, reg + 1);
185 static inline void iga_outb(struct iga_par *par, unsigned char val,
186 unsigned int reg, unsigned int idx )
188 pci_outb(par, idx, reg);
189 pci_outb(par, val, reg+1);
192 #endif /* __sparc__ */
195 * Very important functionality for the JavaEngine1 computer:
196 * make screen border black (usign special IGA registers)
198 static void iga_blank_border(struct iga_par *par)
203 * PROM does this for us, so keep this code as a reminder
204 * about required read from 0x3DA and writing of 0x20 in the end.
206 (void) pci_inb(par, 0x3DA); /* required for every access */
207 pci_outb(par, IGA_IDX_VGA_OVERSCAN, IGA_ATTR_CTL);
208 (void) pci_inb(par, IGA_ATTR_CTL+1);
209 pci_outb(par, 0x38, IGA_ATTR_CTL);
210 pci_outb(par, 0x20, IGA_ATTR_CTL); /* re-enable visual */
213 * This does not work as it was designed because the overscan
214 * color is looked up in the palette. Therefore, under X11
215 * overscan changes color.
217 for (i=0; i < 3; i++)
218 iga_outb(par, 0, IGA_EXT_CNTRL, IGA_IDX_OVERSCAN_COLOR + i);
222 static int igafb_mmap(struct fb_info *info,
223 struct vm_area_struct *vma)
225 struct iga_par *par = (struct iga_par *)info->par;
226 unsigned int size, page, map_size = 0;
227 unsigned long map_offset = 0;
233 size = vma->vm_end - vma->vm_start;
235 /* To stop the swapper from even considering these pages. */
236 vma->vm_flags |= (VM_SHM | VM_LOCKED);
238 /* Each page, see which map applies */
239 for (page = 0; page < size; ) {
241 for (i = 0; par->mmap_map[i].size; i++) {
242 unsigned long start = par->mmap_map[i].voff;
243 unsigned long end = start + par->mmap_map[i].size;
244 unsigned long offset = (vma->vm_pgoff << PAGE_SHIFT) + page;
251 map_size = par->mmap_map[i].size - (offset - start);
252 map_offset = par->mmap_map[i].poff + (offset - start);
259 if (page + map_size > size)
260 map_size = size - page;
262 pgprot_val(vma->vm_page_prot) &= ~(par->mmap_map[i].prot_mask);
263 pgprot_val(vma->vm_page_prot) |= par->mmap_map[i].prot_flag;
265 if (remap_pfn_range(vma, vma->vm_start + page,
266 map_offset >> PAGE_SHIFT, map_size, vma->vm_page_prot))
275 vma->vm_flags |= VM_IO;
278 #endif /* __sparc__ */
280 static int igafb_setcolreg(unsigned regno, unsigned red, unsigned green,
281 unsigned blue, unsigned transp,
282 struct fb_info *info)
285 * Set a single color register. The values supplied are
286 * already rounded down to the hardware's capabilities
287 * (according to the entries in the `var' structure). Return
288 * != 0 for invalid regno.
290 struct iga_par *par = (struct iga_par *)info->par;
292 if (regno >= info->cmap.len)
295 pci_outb(par, regno, DAC_W_INDEX);
296 pci_outb(par, red, DAC_DATA);
297 pci_outb(par, green, DAC_DATA);
298 pci_outb(par, blue, DAC_DATA);
301 switch (info->var.bits_per_pixel) {
303 ((u16*)(info->pseudo_palette))[regno] =
304 (regno << 10) | (regno << 5) | regno;
307 ((u32*)(info->pseudo_palette))[regno] =
308 (regno << 16) | (regno << 8) | regno;
312 i = (regno << 8) | regno;
313 ((u32*)(info->pseudo_palette))[regno] = (i << 16) | i;
322 * Framebuffer option structure
324 static struct fb_ops igafb_ops = {
325 .owner = THIS_MODULE,
326 .fb_setcolreg = igafb_setcolreg,
327 .fb_fillrect = cfb_fillrect,
328 .fb_copyarea = cfb_copyarea,
329 .fb_imageblit = cfb_imageblit,
331 .fb_mmap = igafb_mmap,
335 static int __init iga_init(struct fb_info *info, struct iga_par *par)
337 char vramsz = iga_inb(par, IGA_EXT_CNTRL, IGA_IDX_EXT_BUS_CNTL)
343 info->fix.smem_len = 0x100000;
346 info->fix.smem_len = 0x200000;
349 case MEM_SIZE_RESERVED:
350 info->fix.smem_len = 0x400000;
354 if (info->var.bits_per_pixel > 8)
357 video_cmap_len = 256;
359 info->fbops = &igafb_ops;
360 info->flags = FBINFO_DEFAULT;
362 fb_alloc_cmap(&info->cmap, video_cmap_len, 0);
364 if (register_framebuffer(info) < 0)
367 printk("fb%d: %s frame buffer device at 0x%08lx [%dMB VRAM]\n",
368 info->node, info->fix.id,
369 par->frame_buffer_phys, info->fix.smem_len >> 20);
371 iga_blank_border(par);
375 int __init igafb_init(void)
377 extern int con_is_present(void);
378 struct fb_info *info;
379 struct pci_dev *pdev;
382 int size, iga2000 = 0;
384 if (fb_get_options("igafb", NULL))
387 /* Do not attach when we have a serial console. */
388 if (!con_is_present())
391 pdev = pci_find_device(PCI_VENDOR_ID_INTERG,
392 PCI_DEVICE_ID_INTERG_1682, 0);
395 * XXX We tried to use cyber2000fb.c for IGS 2000.
396 * But it does not initialize the chip in JavaStation-E, alas.
398 pdev = pci_find_device(PCI_VENDOR_ID_INTERG, 0x2000, 0);
405 size = sizeof(struct fb_info) + sizeof(struct iga_par) + sizeof(u32)*16;
407 info = kmalloc(size, GFP_ATOMIC);
409 printk("igafb_init: can't alloc fb_info\n");
412 memset(info, 0, size);
414 par = (struct iga_par *) (info + 1);
417 if ((addr = pdev->resource[0].start) == 0) {
418 printk("igafb_init: no memory start\n");
423 if ((info->screen_base = ioremap(addr, 1024*1024*2)) == 0) {
424 printk("igafb_init: can't remap %lx[2M]\n", addr);
429 par->frame_buffer_phys = addr & PCI_BASE_ADDRESS_MEM_MASK;
433 * The following is sparc specific and this is why:
435 * IGS2000 has its I/O memory mapped and we want
436 * to generate memory cycles on PCI, e.g. do ioremap(),
437 * then readb/writeb() as in Documentation/IO-mapping.txt.
439 * IGS1682 is more traditional, it responds to PCI I/O
440 * cycles, so we want to access it with inb()/outb().
442 * On sparc, PCIC converts CPU memory access within
443 * phys window 0x3000xxxx into PCI I/O cycles. Therefore
444 * we may use readb/writeb to access them with IGS1682.
446 * We do not take io_base_phys from resource[n].start
447 * on IGS1682 because that chip is BROKEN. It does not
448 * have a base register for I/O. We just "know" what its
452 igafb_fix.mmio_start = par->frame_buffer_phys | 0x00800000;
454 igafb_fix.mmio_start = 0x30000000; /* XXX */
456 if ((par->io_base = (int) ioremap(igafb_fix.mmio_start, igafb_fix.smem_len)) == 0) {
457 printk("igafb_init: can't remap %lx[4K]\n", igafb_fix.mmio_start);
458 iounmap((void *)info->screen_base);
464 * Figure mmap addresses from PCI config space.
465 * We need two regions: for video memory and for I/O ports.
466 * Later one can add region for video coprocessor registers.
467 * However, mmap routine loops until size != 0, so we put
468 * one additional region with size == 0.
471 par->mmap_map = kmalloc(4 * sizeof(*par->mmap_map), GFP_ATOMIC);
472 if (!par->mmap_map) {
473 printk("igafb_init: can't alloc mmap_map\n");
474 iounmap((void *)par->io_base);
475 iounmap(info->screen_base);
480 memset(par->mmap_map, 0, 4 * sizeof(*par->mmap_map));
483 * Set default vmode and cmode from PROM properties.
486 struct pcidev_cookie *cookie = pdev->sysdata;
487 int node = cookie->prom_node;
488 int width = prom_getintdefault(node, "width", 1024);
489 int height = prom_getintdefault(node, "height", 768);
490 int depth = prom_getintdefault(node, "depth", 8);
494 default_var = default_var_1024x768;
498 default_var = default_var_1152x900;
502 default_var = default_var_1280x1024;
510 default_var.bits_per_pixel = 8;
513 default_var.bits_per_pixel = 16;
516 default_var.bits_per_pixel = 24;
519 default_var.bits_per_pixel = 32;
527 igafb_fix.smem_start = (unsigned long) info->screen_base;
528 igafb_fix.line_length = default_var.xres*(default_var.bits_per_pixel/8);
529 igafb_fix.visual = default_var.bits_per_pixel <= 8 ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
531 info->var = default_var;
532 info->fix = igafb_fix;
533 info->pseudo_palette = (void *)(par + 1);
534 info->device = &pdev->dev;
536 if (!iga_init(info, par)) {
537 iounmap((void *)par->io_base);
538 iounmap(info->screen_base);
539 kfree(par->mmap_map);
545 * Add /dev/fb mmap values.
548 /* First region is for video memory */
549 par->mmap_map[0].voff = 0x0;
550 par->mmap_map[0].poff = par->frame_buffer_phys & PAGE_MASK;
551 par->mmap_map[0].size = info->fix.smem_len & PAGE_MASK;
552 par->mmap_map[0].prot_mask = SRMMU_CACHE;
553 par->mmap_map[0].prot_flag = SRMMU_WRITE;
555 /* Second region is for I/O ports */
556 par->mmap_map[1].voff = par->frame_buffer_phys & PAGE_MASK;
557 par->mmap_map[1].poff = info->fix.smem_start & PAGE_MASK;
558 par->mmap_map[1].size = PAGE_SIZE * 2; /* X wants 2 pages */
559 par->mmap_map[1].prot_mask = SRMMU_CACHE;
560 par->mmap_map[1].prot_flag = SRMMU_WRITE;
561 #endif /* __sparc__ */
566 int __init igafb_setup(char *options)
570 if (!options || !*options)
573 while ((this_opt = strsep(&options, ",")) != NULL) {
578 module_init(igafb_init);
579 MODULE_LICENSE("GPL");