1 /*
2 * linux/drivers/video/igafb.c -- Frame buffer device for IGA 1682
3 *
4 * Copyright (C) 1998 Vladimir Roganov and Gleb Raiko
5 *
6 * This driver is partly based on the Frame buffer device for ATI Mach64
7 * and partially on VESA-related code.
8 *
9 * Copyright (C) 1997-1998 Geert Uytterhoeven
10 * Copyright (C) 1998 Bernd Harries
11 * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
12 *
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
15 * more details.
16 */
17
18 /******************************************************************************
19
20 TODO:
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.
25
26 Most important thing at this moment is that we have working
27 JavaEngine1 console & X with new console interface.
28
29 ******************************************************************************/
30
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/errno.h>
34 #include <linux/string.h>
35 #include <linux/mm.h>
36 #include <linux/slab.h>
37 #include <linux/vmalloc.h>
38 #include <linux/delay.h>
39 #include <linux/interrupt.h>
40 #include <linux/fb.h>
41 #include <linux/init.h>
42 #include <linux/pci.h>
43 #include <linux/nvram.h>
44
45 #include <asm/io.h>
46
47 #ifdef CONFIG_SPARC
48 #include <asm/prom.h>
49 #include <asm/pcic.h>
50 #endif
51
52 #include <video/iga.h>
53
54 struct pci_mmap_map {
55 unsigned long voff;
56 unsigned long poff;
57 unsigned long size;
58 unsigned long prot_flag;
59 unsigned long prot_mask;
60 };
61
62 struct iga_par {
63 struct pci_mmap_map *mmap_map;
64 unsigned long frame_buffer_phys;
65 unsigned long io_base;
66 };
67
68 struct fb_info fb_info;
69
70 struct fb_fix_screeninfo igafb_fix __initdata = {
71 .id = "IGA 1682",
72 .type = FB_TYPE_PACKED_PIXELS,
73 .mmio_len = 1000
74 };
75
76 struct fb_var_screeninfo default_var = {
77 /* 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) */
78 .xres = 640,
79 .yres = 480,
80 .xres_virtual = 640,
81 .yres_virtual = 480,
82 .bits_per_pixel = 8,
83 .red = {0, 8, 0 },
84 .green = {0, 8, 0 },
85 .blue = {0, 8, 0 },
86 .height = -1,
87 .width = -1,
88 .accel_flags = FB_ACCEL_NONE,
89 .pixclock = 39722,
90 .left_margin = 48,
91 .right_margin = 16,
92 .upper_margin = 33,
93 .lower_margin = 10,
94 .hsync_len = 96,
95 .vsync_len = 2,
96 .vmode = FB_VMODE_NONINTERLACED
97 };
98
99 #ifdef CONFIG_SPARC
100 struct fb_var_screeninfo default_var_1024x768 __initdata = {
101 /* 1024x768, 75 Hz, Non-Interlaced (78.75 MHz dotclock) */
102 .xres = 1024,
103 .yres = 768,
104 .xres_virtual = 1024,
105 .yres_virtual = 768,
106 .bits_per_pixel = 8,
107 .red = {0, 8, 0 },
108 .green = {0, 8, 0 },
109 .blue = {0, 8, 0 },
110 .height = -1,
111 .width = -1,
112 .accel_flags = FB_ACCEL_NONE,
113 .pixclock = 12699,
114 .left_margin = 176,
115 .right_margin = 16,
116 .upper_margin = 28,
117 .lower_margin = 1,
118 .hsync_len = 96,
119 .vsync_len = 3,
120 .vmode = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
121 };
122
123 struct fb_var_screeninfo default_var_1152x900 __initdata = {
124 /* 1152x900, 76 Hz, Non-Interlaced (110.0 MHz dotclock) */
125 .xres = 1152,
126 .yres = 900,
127 .xres_virtual = 1152,
128 .yres_virtual = 900,
129 .bits_per_pixel = 8,
130 .red = { 0, 8, 0 },
131 .green = { 0, 8, 0 },
132 .blue = { 0, 8, 0 },
133 .height = -1,
134 .width = -1,
135 .accel_flags = FB_ACCEL_NONE,
136 .pixclock = 9091,
137 .left_margin = 234,
138 .right_margin = 24,
139 .upper_margin = 34,
140 .lower_margin = 3,
141 .hsync_len = 100,
142 .vsync_len = 3,
143 .vmode = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
144 };
145
146 struct fb_var_screeninfo default_var_1280x1024 __initdata = {
147 /* 1280x1024, 75 Hz, Non-Interlaced (135.00 MHz dotclock) */
148 .xres = 1280,
149 .yres = 1024,
150 .xres_virtual = 1280,
151 .yres_virtual = 1024,
152 .bits_per_pixel = 8,
153 .red = {0, 8, 0 },
154 .green = {0, 8, 0 },
155 .blue = {0, 8, 0 },
156 .height = -1,
157 .width = -1,
158 .accel_flags = 0,
159 .pixclock = 7408,
160 .left_margin = 248,
161 .right_margin = 16,
162 .upper_margin = 38,
163 .lower_margin = 1,
164 .hsync_len = 144,
165 .vsync_len = 3,
166 .vmode = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
167 };
168
169 /*
170 * Memory-mapped I/O functions for Sparc PCI
171 *
172 * On sparc we happen to access I/O with memory mapped functions too.
173 */
174 #define pci_inb(par, reg) readb(par->io_base+(reg))
175 #define pci_outb(par, val, reg) writeb(val, par->io_base+(reg))
176
iga_inb(struct iga_par * par,unsigned int reg,unsigned int idx)177 static inline unsigned int iga_inb(struct iga_par *par, unsigned int reg,
178 unsigned int idx)
179 {
180 pci_outb(par, idx, reg);
181 return pci_inb(par, reg + 1);
182 }
183
iga_outb(struct iga_par * par,unsigned char val,unsigned int reg,unsigned int idx)184 static inline void iga_outb(struct iga_par *par, unsigned char val,
185 unsigned int reg, unsigned int idx )
186 {
187 pci_outb(par, idx, reg);
188 pci_outb(par, val, reg+1);
189 }
190
191 #endif /* CONFIG_SPARC */
192
193 /*
194 * Very important functionality for the JavaEngine1 computer:
195 * make screen border black (usign special IGA registers)
196 */
iga_blank_border(struct iga_par * par)197 static void iga_blank_border(struct iga_par *par)
198 {
199 int i;
200 #if 0
201 /*
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.
204 */
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 */
210 #endif
211 /*
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.
215 */
216 for (i=0; i < 3; i++)
217 iga_outb(par, 0, IGA_EXT_CNTRL, IGA_IDX_OVERSCAN_COLOR + i);
218 }
219
220 #ifdef CONFIG_SPARC
igafb_mmap(struct fb_info * info,struct vm_area_struct * vma)221 static int igafb_mmap(struct fb_info *info,
222 struct vm_area_struct *vma)
223 {
224 struct iga_par *par = (struct iga_par *)info->par;
225 unsigned int size, page, map_size = 0;
226 unsigned long map_offset = 0;
227 int i;
228
229 if (!par->mmap_map)
230 return -ENXIO;
231
232 size = vma->vm_end - vma->vm_start;
233
234 /* Each page, see which map applies */
235 for (page = 0; page < size; ) {
236 map_size = 0;
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;
241
242 if (start > offset)
243 continue;
244 if (offset >= end)
245 continue;
246
247 map_size = par->mmap_map[i].size - (offset - start);
248 map_offset = par->mmap_map[i].poff + (offset - start);
249 break;
250 }
251 if (!map_size) {
252 page += PAGE_SIZE;
253 continue;
254 }
255 if (page + map_size > size)
256 map_size = size - page;
257
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;
260
261 if (remap_pfn_range(vma, vma->vm_start + page,
262 map_offset >> PAGE_SHIFT, map_size, vma->vm_page_prot))
263 return -EAGAIN;
264
265 page += map_size;
266 }
267
268 if (!map_size)
269 return -EINVAL;
270
271 vma->vm_flags |= VM_IO;
272 return 0;
273 }
274 #endif /* CONFIG_SPARC */
275
igafb_setcolreg(unsigned regno,unsigned red,unsigned green,unsigned blue,unsigned transp,struct fb_info * info)276 static int igafb_setcolreg(unsigned regno, unsigned red, unsigned green,
277 unsigned blue, unsigned transp,
278 struct fb_info *info)
279 {
280 /*
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.
285 */
286 struct iga_par *par = (struct iga_par *)info->par;
287
288 if (regno >= info->cmap.len)
289 return 1;
290
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);
295
296 if (regno < 16) {
297 switch (info->var.bits_per_pixel) {
298 case 16:
299 ((u16*)(info->pseudo_palette))[regno] =
300 (regno << 10) | (regno << 5) | regno;
301 break;
302 case 24:
303 ((u32*)(info->pseudo_palette))[regno] =
304 (regno << 16) | (regno << 8) | regno;
305 break;
306 case 32:
307 { int i;
308 i = (regno << 8) | regno;
309 ((u32*)(info->pseudo_palette))[regno] = (i << 16) | i;
310 }
311 break;
312 }
313 }
314 return 0;
315 }
316
317 /*
318 * Framebuffer option structure
319 */
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,
326 #ifdef CONFIG_SPARC
327 .fb_mmap = igafb_mmap,
328 #endif
329 };
330
iga_init(struct fb_info * info,struct iga_par * par)331 static int __init iga_init(struct fb_info *info, struct iga_par *par)
332 {
333 char vramsz = iga_inb(par, IGA_EXT_CNTRL, IGA_IDX_EXT_BUS_CNTL)
334 & MEM_SIZE_ALIAS;
335 int video_cmap_len;
336
337 switch (vramsz) {
338 case MEM_SIZE_1M:
339 info->fix.smem_len = 0x100000;
340 break;
341 case MEM_SIZE_2M:
342 info->fix.smem_len = 0x200000;
343 break;
344 case MEM_SIZE_4M:
345 case MEM_SIZE_RESERVED:
346 info->fix.smem_len = 0x400000;
347 break;
348 }
349
350 if (info->var.bits_per_pixel > 8)
351 video_cmap_len = 16;
352 else
353 video_cmap_len = 256;
354
355 info->fbops = &igafb_ops;
356 info->flags = FBINFO_DEFAULT;
357
358 fb_alloc_cmap(&info->cmap, video_cmap_len, 0);
359
360 if (register_framebuffer(info) < 0)
361 return 0;
362
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);
366
367 iga_blank_border(par);
368 return 1;
369 }
370
igafb_init(void)371 static int __init igafb_init(void)
372 {
373 struct fb_info *info;
374 struct pci_dev *pdev;
375 struct iga_par *par;
376 unsigned long addr;
377 int size, iga2000 = 0;
378
379 if (fb_get_options("igafb", NULL))
380 return -ENODEV;
381
382 pdev = pci_get_device(PCI_VENDOR_ID_INTERG,
383 PCI_DEVICE_ID_INTERG_1682, 0);
384 if (pdev == NULL) {
385 /*
386 * XXX We tried to use cyber2000fb.c for IGS 2000.
387 * But it does not initialize the chip in JavaStation-E, alas.
388 */
389 pdev = pci_get_device(PCI_VENDOR_ID_INTERG, 0x2000, 0);
390 if(pdev == NULL) {
391 return -ENXIO;
392 }
393 iga2000 = 1;
394 }
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 */
397
398 size = sizeof(struct iga_par) + sizeof(u32)*16;
399
400 info = framebuffer_alloc(size, &pdev->dev);
401 if (!info) {
402 printk("igafb_init: can't alloc fb_info\n");
403 pci_dev_put(pdev);
404 return -ENOMEM;
405 }
406
407 par = info->par;
408
409 if ((addr = pdev->resource[0].start) == 0) {
410 printk("igafb_init: no memory start\n");
411 kfree(info);
412 pci_dev_put(pdev);
413 return -ENXIO;
414 }
415
416 if ((info->screen_base = ioremap(addr, 1024*1024*2)) == 0) {
417 printk("igafb_init: can't remap %lx[2M]\n", addr);
418 kfree(info);
419 pci_dev_put(pdev);
420 return -ENXIO;
421 }
422
423 par->frame_buffer_phys = addr & PCI_BASE_ADDRESS_MEM_MASK;
424
425 #ifdef CONFIG_SPARC
426 /*
427 * The following is sparc specific and this is why:
428 *
429 * IGS2000 has its I/O memory mapped and we want
430 * to generate memory cycles on PCI, e.g. do ioremap(),
431 * then readb/writeb() as in Documentation/io-mapping.txt.
432 *
433 * IGS1682 is more traditional, it responds to PCI I/O
434 * cycles, so we want to access it with inb()/outb().
435 *
436 * On sparc, PCIC converts CPU memory access within
437 * phys window 0x3000xxxx into PCI I/O cycles. Therefore
438 * we may use readb/writeb to access them with IGS1682.
439 *
440 * We do not take io_base_phys from resource[n].start
441 * on IGS1682 because that chip is BROKEN. It does not
442 * have a base register for I/O. We just "know" what its
443 * I/O addresses are.
444 */
445 if (iga2000) {
446 igafb_fix.mmio_start = par->frame_buffer_phys | 0x00800000;
447 } else {
448 igafb_fix.mmio_start = 0x30000000; /* XXX */
449 }
450 if ((par->io_base = (int) ioremap(igafb_fix.mmio_start, igafb_fix.smem_len)) == 0) {
451 printk("igafb_init: can't remap %lx[4K]\n", igafb_fix.mmio_start);
452 iounmap((void *)info->screen_base);
453 kfree(info);
454 pci_dev_put(pdev);
455 return -ENXIO;
456 }
457
458 /*
459 * Figure mmap addresses from PCI config space.
460 * We need two regions: for video memory and for I/O ports.
461 * Later one can add region for video coprocessor registers.
462 * However, mmap routine loops until size != 0, so we put
463 * one additional region with size == 0.
464 */
465
466 par->mmap_map = kzalloc(4 * sizeof(*par->mmap_map), GFP_ATOMIC);
467 if (!par->mmap_map) {
468 printk("igafb_init: can't alloc mmap_map\n");
469 iounmap((void *)par->io_base);
470 iounmap(info->screen_base);
471 kfree(info);
472 pci_dev_put(pdev);
473 return -ENOMEM;
474 }
475
476 /*
477 * Set default vmode and cmode from PROM properties.
478 */
479 {
480 struct device_node *dp = pci_device_to_OF_node(pdev);
481 int node = dp->node;
482 int width = prom_getintdefault(node, "width", 1024);
483 int height = prom_getintdefault(node, "height", 768);
484 int depth = prom_getintdefault(node, "depth", 8);
485 switch (width) {
486 case 1024:
487 if (height == 768)
488 default_var = default_var_1024x768;
489 break;
490 case 1152:
491 if (height == 900)
492 default_var = default_var_1152x900;
493 break;
494 case 1280:
495 if (height == 1024)
496 default_var = default_var_1280x1024;
497 break;
498 default:
499 break;
500 }
501
502 switch (depth) {
503 case 8:
504 default_var.bits_per_pixel = 8;
505 break;
506 case 16:
507 default_var.bits_per_pixel = 16;
508 break;
509 case 24:
510 default_var.bits_per_pixel = 24;
511 break;
512 case 32:
513 default_var.bits_per_pixel = 32;
514 break;
515 default:
516 break;
517 }
518 }
519
520 #endif
521 igafb_fix.smem_start = (unsigned long) info->screen_base;
522 igafb_fix.line_length = default_var.xres*(default_var.bits_per_pixel/8);
523 igafb_fix.visual = default_var.bits_per_pixel <= 8 ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
524
525 info->var = default_var;
526 info->fix = igafb_fix;
527 info->pseudo_palette = (void *)(par + 1);
528
529 if (!iga_init(info, par)) {
530 iounmap((void *)par->io_base);
531 iounmap(info->screen_base);
532 kfree(par->mmap_map);
533 kfree(info);
534 return -ENODEV;
535 }
536
537 #ifdef CONFIG_SPARC
538 /*
539 * Add /dev/fb mmap values.
540 */
541
542 /* First region is for video memory */
543 par->mmap_map[0].voff = 0x0;
544 par->mmap_map[0].poff = par->frame_buffer_phys & PAGE_MASK;
545 par->mmap_map[0].size = info->fix.smem_len & PAGE_MASK;
546 par->mmap_map[0].prot_mask = SRMMU_CACHE;
547 par->mmap_map[0].prot_flag = SRMMU_WRITE;
548
549 /* Second region is for I/O ports */
550 par->mmap_map[1].voff = par->frame_buffer_phys & PAGE_MASK;
551 par->mmap_map[1].poff = info->fix.smem_start & PAGE_MASK;
552 par->mmap_map[1].size = PAGE_SIZE * 2; /* X wants 2 pages */
553 par->mmap_map[1].prot_mask = SRMMU_CACHE;
554 par->mmap_map[1].prot_flag = SRMMU_WRITE;
555 #endif /* CONFIG_SPARC */
556
557 return 0;
558 }
559
igafb_setup(char * options)560 static int __init igafb_setup(char *options)
561 {
562 char *this_opt;
563
564 if (!options || !*options)
565 return 0;
566
567 while ((this_opt = strsep(&options, ",")) != NULL) {
568 }
569 return 0;
570 }
571
572 module_init(igafb_init);
573 MODULE_LICENSE("GPL");
574 static struct pci_device_id igafb_pci_tbl[] = {
575 { PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_1682,
576 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
577 { }
578 };
579
580 MODULE_DEVICE_TABLE(pci, igafb_pci_tbl);
581