1 /* tcx.c: TCX frame buffer driver
3 * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
4 * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
5 * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
6 * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
8 * Driver layout based loosely on tgafb.c, see that file for credits.
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/string.h>
15 #include <linux/slab.h>
16 #include <linux/delay.h>
17 #include <linux/init.h>
20 #include <linux/of_device.h>
31 static int tcx_setcolreg(unsigned, unsigned, unsigned, unsigned,
32 unsigned, struct fb_info *);
33 static int tcx_blank(int, struct fb_info *);
35 static int tcx_mmap(struct fb_info *, struct vm_area_struct *);
36 static int tcx_ioctl(struct fb_info *, unsigned int, unsigned long);
37 static int tcx_pan_display(struct fb_var_screeninfo *, struct fb_info *);
40 * Frame buffer operations
43 static struct fb_ops tcx_ops = {
45 .fb_setcolreg = tcx_setcolreg,
46 .fb_blank = tcx_blank,
47 .fb_pan_display = tcx_pan_display,
48 .fb_fillrect = cfb_fillrect,
49 .fb_copyarea = cfb_copyarea,
50 .fb_imageblit = cfb_imageblit,
52 .fb_ioctl = tcx_ioctl,
54 .fb_compat_ioctl = sbusfb_compat_ioctl,
59 #define TCX_THC_MISC_REV_SHIFT 16
60 #define TCX_THC_MISC_REV_MASK 15
61 #define TCX_THC_MISC_VSYNC_DIS (1 << 25)
62 #define TCX_THC_MISC_HSYNC_DIS (1 << 24)
63 #define TCX_THC_MISC_RESET (1 << 12)
64 #define TCX_THC_MISC_VIDEO (1 << 10)
65 #define TCX_THC_MISC_SYNC (1 << 9)
66 #define TCX_THC_MISC_VSYNC (1 << 8)
67 #define TCX_THC_MISC_SYNC_ENAB (1 << 7)
68 #define TCX_THC_MISC_CURS_RES (1 << 6)
69 #define TCX_THC_MISC_INT_ENAB (1 << 5)
70 #define TCX_THC_MISC_INT (1 << 4)
71 #define TCX_THC_MISC_INIT 0x9f
72 #define TCX_THC_REV_REV_SHIFT 20
73 #define TCX_THC_REV_REV_MASK 15
74 #define TCX_THC_REV_MINREV_SHIFT 28
75 #define TCX_THC_REV_MINREV_MASK 15
77 /* The contents are unknown */
87 u32 thc_hs; /* hsync timing */
90 u32 thc_vs; /* vsync timing */
95 u32 thc_cursxy; /* cursor x,y position (16 bits each) */
96 u32 thc_cursmask[32]; /* cursor mask bits */
97 u32 thc_cursbits[32]; /* what to show where mask enabled */
107 #define TCX_MMAP_ENTRIES 14
111 struct bt_regs __iomem *bt;
112 struct tcx_thc __iomem *thc;
113 struct tcx_tec __iomem *tec;
117 #define TCX_FLAG_BLANKED 0x00000001
119 unsigned long which_io;
121 struct sbus_mmap_map mmap_map[TCX_MMAP_ENTRIES];
125 /* Reset control plane so that WID is 8-bit plane. */
126 static void __tcx_set_control_plane(struct fb_info *info)
128 struct tcx_par *par = info->par;
129 u32 __iomem *p, *pend;
137 for (pend = p + info->fix.smem_len; p < pend; p++) {
138 u32 tmp = sbus_readl(p);
145 static void tcx_reset(struct fb_info *info)
147 struct tcx_par *par = (struct tcx_par *) info->par;
150 spin_lock_irqsave(&par->lock, flags);
151 __tcx_set_control_plane(info);
152 spin_unlock_irqrestore(&par->lock, flags);
155 static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
162 * tcx_setcolreg - Optional function. Sets a color register.
163 * @regno: boolean, 0 copy local, 1 get_user() function
164 * @red: frame buffer colormap structure
165 * @green: The green value which can be up to 16 bits wide
166 * @blue: The blue value which can be up to 16 bits wide.
167 * @transp: If supported the alpha value which can be up to 16 bits wide.
168 * @info: frame buffer info structure
170 static int tcx_setcolreg(unsigned regno,
171 unsigned red, unsigned green, unsigned blue,
172 unsigned transp, struct fb_info *info)
174 struct tcx_par *par = (struct tcx_par *) info->par;
175 struct bt_regs __iomem *bt = par->bt;
185 spin_lock_irqsave(&par->lock, flags);
187 sbus_writel(regno << 24, &bt->addr);
188 sbus_writel(red << 24, &bt->color_map);
189 sbus_writel(green << 24, &bt->color_map);
190 sbus_writel(blue << 24, &bt->color_map);
192 spin_unlock_irqrestore(&par->lock, flags);
198 * tcx_blank - Optional function. Blanks the display.
199 * @blank_mode: the blank mode we want.
200 * @info: frame buffer structure that represents a single frame buffer
203 tcx_blank(int blank, struct fb_info *info)
205 struct tcx_par *par = (struct tcx_par *) info->par;
206 struct tcx_thc __iomem *thc = par->thc;
210 spin_lock_irqsave(&par->lock, flags);
212 val = sbus_readl(&thc->thc_misc);
215 case FB_BLANK_UNBLANK: /* Unblanking */
216 val &= ~(TCX_THC_MISC_VSYNC_DIS |
217 TCX_THC_MISC_HSYNC_DIS);
218 val |= TCX_THC_MISC_VIDEO;
219 par->flags &= ~TCX_FLAG_BLANKED;
222 case FB_BLANK_NORMAL: /* Normal blanking */
223 val &= ~TCX_THC_MISC_VIDEO;
224 par->flags |= TCX_FLAG_BLANKED;
227 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
228 val |= TCX_THC_MISC_VSYNC_DIS;
230 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
231 val |= TCX_THC_MISC_HSYNC_DIS;
234 case FB_BLANK_POWERDOWN: /* Poweroff */
238 sbus_writel(val, &thc->thc_misc);
240 spin_unlock_irqrestore(&par->lock, flags);
245 static struct sbus_mmap_map __tcx_mmap_map[TCX_MMAP_ENTRIES] = {
248 .size = SBUS_MMAP_FBSIZE(1)
251 .voff = TCX_RAM24BIT,
252 .size = SBUS_MMAP_FBSIZE(4)
256 .size = SBUS_MMAP_FBSIZE(8)
260 .size = SBUS_MMAP_FBSIZE(8)
263 .voff = TCX_CONTROLPLANE,
264 .size = SBUS_MMAP_FBSIZE(4)
268 .size = SBUS_MMAP_FBSIZE(8)
272 .size = SBUS_MMAP_FBSIZE(8)
301 static int tcx_mmap(struct fb_info *info, struct vm_area_struct *vma)
303 struct tcx_par *par = (struct tcx_par *)info->par;
305 return sbusfb_mmap_helper(par->mmap_map,
306 info->fix.smem_start, info->fix.smem_len,
310 static int tcx_ioctl(struct fb_info *info, unsigned int cmd,
313 struct tcx_par *par = (struct tcx_par *) info->par;
315 return sbusfb_ioctl_helper(cmd, arg, info,
317 (par->lowdepth ? 8 : 24),
326 tcx_init_fix(struct fb_info *info, int linebytes)
328 struct tcx_par *par = (struct tcx_par *)info->par;
329 const char *tcx_name;
336 strlcpy(info->fix.id, tcx_name, sizeof(info->fix.id));
338 info->fix.type = FB_TYPE_PACKED_PIXELS;
339 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
341 info->fix.line_length = linebytes;
343 info->fix.accel = FB_ACCEL_SUN_TCX;
346 static void tcx_unmap_regs(struct of_device *op, struct fb_info *info,
350 of_iounmap(&op->resource[7],
351 par->tec, sizeof(struct tcx_tec));
353 of_iounmap(&op->resource[9],
354 par->thc, sizeof(struct tcx_thc));
356 of_iounmap(&op->resource[8],
357 par->bt, sizeof(struct bt_regs));
359 of_iounmap(&op->resource[4],
360 par->cplane, info->fix.smem_len * sizeof(u32));
361 if (info->screen_base)
362 of_iounmap(&op->resource[0],
363 info->screen_base, info->fix.smem_len);
366 static int __devinit tcx_probe(struct of_device *op,
367 const struct of_device_id *match)
369 struct device_node *dp = op->node;
370 struct fb_info *info;
372 int linebytes, i, err;
374 info = framebuffer_alloc(sizeof(struct tcx_par), &op->dev);
381 spin_lock_init(&par->lock);
384 (of_find_property(dp, "tcx-8-bit", NULL) != NULL);
386 sbusfb_fill_var(&info->var, dp, 8);
387 info->var.red.length = 8;
388 info->var.green.length = 8;
389 info->var.blue.length = 8;
391 linebytes = of_getintprop_default(dp, "linebytes",
393 info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
395 par->tec = of_ioremap(&op->resource[7], 0,
396 sizeof(struct tcx_tec), "tcx tec");
397 par->thc = of_ioremap(&op->resource[9], 0,
398 sizeof(struct tcx_thc), "tcx thc");
399 par->bt = of_ioremap(&op->resource[8], 0,
400 sizeof(struct bt_regs), "tcx dac");
401 info->screen_base = of_ioremap(&op->resource[0], 0,
402 info->fix.smem_len, "tcx ram");
403 if (!par->tec || !par->thc ||
404 !par->bt || !info->screen_base)
407 memcpy(&par->mmap_map, &__tcx_mmap_map, sizeof(par->mmap_map));
408 if (!par->lowdepth) {
409 par->cplane = of_ioremap(&op->resource[4], 0,
410 info->fix.smem_len * sizeof(u32),
415 par->mmap_map[1].size = SBUS_MMAP_EMPTY;
416 par->mmap_map[4].size = SBUS_MMAP_EMPTY;
417 par->mmap_map[5].size = SBUS_MMAP_EMPTY;
418 par->mmap_map[6].size = SBUS_MMAP_EMPTY;
421 info->fix.smem_start = op->resource[0].start;
422 par->which_io = op->resource[0].flags & IORESOURCE_BITS;
424 for (i = 0; i < TCX_MMAP_ENTRIES; i++) {
440 par->mmap_map[i].poff = op->resource[j].start;
443 info->flags = FBINFO_DEFAULT;
444 info->fbops = &tcx_ops;
446 /* Initialize brooktree DAC. */
447 sbus_writel(0x04 << 24, &par->bt->addr); /* color planes */
448 sbus_writel(0xff << 24, &par->bt->control);
449 sbus_writel(0x05 << 24, &par->bt->addr);
450 sbus_writel(0x00 << 24, &par->bt->control);
451 sbus_writel(0x06 << 24, &par->bt->addr); /* overlay plane */
452 sbus_writel(0x73 << 24, &par->bt->control);
453 sbus_writel(0x07 << 24, &par->bt->addr);
454 sbus_writel(0x00 << 24, &par->bt->control);
458 tcx_blank(FB_BLANK_UNBLANK, info);
460 if (fb_alloc_cmap(&info->cmap, 256, 0))
463 fb_set_cmap(&info->cmap, info);
464 tcx_init_fix(info, linebytes);
466 err = register_framebuffer(info);
468 goto out_dealloc_cmap;
470 dev_set_drvdata(&op->dev, info);
472 printk(KERN_INFO "%s: TCX at %lx:%lx, %s\n",
475 info->fix.smem_start,
476 par->lowdepth ? "8-bit only" : "24-bit depth");
481 fb_dealloc_cmap(&info->cmap);
484 tcx_unmap_regs(op, info, par);
490 static int __devexit tcx_remove(struct of_device *op)
492 struct fb_info *info = dev_get_drvdata(&op->dev);
493 struct tcx_par *par = info->par;
495 unregister_framebuffer(info);
496 fb_dealloc_cmap(&info->cmap);
498 tcx_unmap_regs(op, info, par);
500 framebuffer_release(info);
502 dev_set_drvdata(&op->dev, NULL);
507 static const struct of_device_id tcx_match[] = {
513 MODULE_DEVICE_TABLE(of, tcx_match);
515 static struct of_platform_driver tcx_driver = {
517 .match_table = tcx_match,
519 .remove = __devexit_p(tcx_remove),
522 static int __init tcx_init(void)
524 if (fb_get_options("tcxfb", NULL))
527 return of_register_driver(&tcx_driver, &of_bus_type);
530 static void __exit tcx_exit(void)
532 of_unregister_driver(&tcx_driver);
535 module_init(tcx_init);
536 module_exit(tcx_exit);
538 MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
539 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
540 MODULE_VERSION("2.0");
541 MODULE_LICENSE("GPL");