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1 | /* tcx.c: TCX frame buffer driver |
2 | * |
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) |
7 | * |
8 | * Driver layout based loosely on tgafb.c, see that file for credits. |
9 | */ |
10 | |
11 | #include <linux/module.h> |
12 | #include <linux/kernel.h> |
13 | #include <linux/errno.h> |
14 | #include <linux/string.h> |
15 | #include <linux/delay.h> |
16 | #include <linux/init.h> |
17 | #include <linux/fb.h> |
18 | #include <linux/mm.h> |
19 | #include <linux/of_device.h> |
20 | |
21 | #include <asm/io.h> |
22 | #include <asm/fbio.h> |
23 | |
24 | #include "sbuslib.h" |
25 | |
26 | /* |
27 | * Local functions. |
28 | */ |
29 | |
30 | static int tcx_setcolreg(unsigned, unsigned, unsigned, unsigned, |
31 | unsigned, struct fb_info *); |
32 | static int tcx_blank(int, struct fb_info *); |
33 | |
34 | static int tcx_mmap(struct fb_info *, struct vm_area_struct *); |
35 | static int tcx_ioctl(struct fb_info *, unsigned int, unsigned long); |
36 | static int tcx_pan_display(struct fb_var_screeninfo *, struct fb_info *); |
37 | |
38 | /* |
39 | * Frame buffer operations |
40 | */ |
41 | |
42 | static struct fb_ops tcx_ops = { |
43 | .owner = THIS_MODULE, |
44 | .fb_setcolreg = tcx_setcolreg, |
45 | .fb_blank = tcx_blank, |
46 | .fb_pan_display = tcx_pan_display, |
47 | .fb_fillrect = cfb_fillrect, |
48 | .fb_copyarea = cfb_copyarea, |
49 | .fb_imageblit = cfb_imageblit, |
50 | .fb_mmap = tcx_mmap, |
51 | .fb_ioctl = tcx_ioctl, |
52 | #ifdef CONFIG_COMPAT |
53 | .fb_compat_ioctl = sbusfb_compat_ioctl, |
54 | #endif |
55 | }; |
56 | |
57 | /* THC definitions */ |
58 | #define TCX_THC_MISC_REV_SHIFT 16 |
59 | #define TCX_THC_MISC_REV_MASK 15 |
60 | #define TCX_THC_MISC_VSYNC_DIS (1 << 25) |
61 | #define TCX_THC_MISC_HSYNC_DIS (1 << 24) |
62 | #define TCX_THC_MISC_RESET (1 << 12) |
63 | #define TCX_THC_MISC_VIDEO (1 << 10) |
64 | #define TCX_THC_MISC_SYNC (1 << 9) |
65 | #define TCX_THC_MISC_VSYNC (1 << 8) |
66 | #define TCX_THC_MISC_SYNC_ENAB (1 << 7) |
67 | #define TCX_THC_MISC_CURS_RES (1 << 6) |
68 | #define TCX_THC_MISC_INT_ENAB (1 << 5) |
69 | #define TCX_THC_MISC_INT (1 << 4) |
70 | #define TCX_THC_MISC_INIT 0x9f |
71 | #define TCX_THC_REV_REV_SHIFT 20 |
72 | #define TCX_THC_REV_REV_MASK 15 |
73 | #define TCX_THC_REV_MINREV_SHIFT 28 |
74 | #define TCX_THC_REV_MINREV_MASK 15 |
75 | |
76 | /* The contents are unknown */ |
77 | struct tcx_tec { |
78 | u32 tec_matrix; |
79 | u32 tec_clip; |
80 | u32 tec_vdc; |
81 | }; |
82 | |
83 | struct tcx_thc { |
84 | u32 thc_rev; |
85 | u32 thc_pad0[511]; |
86 | u32 thc_hs; /* hsync timing */ |
87 | u32 thc_hsdvs; |
88 | u32 thc_hd; |
89 | u32 thc_vs; /* vsync timing */ |
90 | u32 thc_vd; |
91 | u32 thc_refresh; |
92 | u32 thc_misc; |
93 | u32 thc_pad1[56]; |
94 | u32 thc_cursxy; /* cursor x,y position (16 bits each) */ |
95 | u32 thc_cursmask[32]; /* cursor mask bits */ |
96 | u32 thc_cursbits[32]; /* what to show where mask enabled */ |
97 | }; |
98 | |
99 | struct bt_regs { |
100 | u32 addr; |
101 | u32 color_map; |
102 | u32 control; |
103 | u32 cursor; |
104 | }; |
105 | |
106 | #define TCX_MMAP_ENTRIES 14 |
107 | |
108 | struct tcx_par { |
109 | spinlock_t lock; |
110 | struct bt_regs __iomem *bt; |
111 | struct tcx_thc __iomem *thc; |
112 | struct tcx_tec __iomem *tec; |
113 | u32 __iomem *cplane; |
114 | |
115 | u32 flags; |
116 | #define TCX_FLAG_BLANKED 0x00000001 |
117 | |
118 | unsigned long which_io; |
119 | |
120 | struct sbus_mmap_map mmap_map[TCX_MMAP_ENTRIES]; |
121 | int lowdepth; |
122 | }; |
123 | |
124 | /* Reset control plane so that WID is 8-bit plane. */ |
125 | static void __tcx_set_control_plane(struct fb_info *info) |
126 | { |
127 | struct tcx_par *par = info->par; |
128 | u32 __iomem *p, *pend; |
129 | |
130 | if (par->lowdepth) |
131 | return; |
132 | |
133 | p = par->cplane; |
134 | if (p == NULL) |
135 | return; |
136 | for (pend = p + info->fix.smem_len; p < pend; p++) { |
137 | u32 tmp = sbus_readl(p); |
138 | |
139 | tmp &= 0xffffff; |
140 | sbus_writel(tmp, p); |
141 | } |
142 | } |
143 | |
144 | static void tcx_reset(struct fb_info *info) |
145 | { |
146 | struct tcx_par *par = (struct tcx_par *) info->par; |
147 | unsigned long flags; |
148 | |
149 | spin_lock_irqsave(&par->lock, flags); |
150 | __tcx_set_control_plane(info); |
151 | spin_unlock_irqrestore(&par->lock, flags); |
152 | } |
153 | |
154 | static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) |
155 | { |
156 | tcx_reset(info); |
157 | return 0; |
158 | } |
159 | |
160 | /** |
161 | * tcx_setcolreg - Optional function. Sets a color register. |
162 | * @regno: boolean, 0 copy local, 1 get_user() function |
163 | * @red: frame buffer colormap structure |
164 | * @green: The green value which can be up to 16 bits wide |
165 | * @blue: The blue value which can be up to 16 bits wide. |
166 | * @transp: If supported the alpha value which can be up to 16 bits wide. |
167 | * @info: frame buffer info structure |
168 | */ |
169 | static int tcx_setcolreg(unsigned regno, |
170 | unsigned red, unsigned green, unsigned blue, |
171 | unsigned transp, struct fb_info *info) |
172 | { |
173 | struct tcx_par *par = (struct tcx_par *) info->par; |
174 | struct bt_regs __iomem *bt = par->bt; |
175 | unsigned long flags; |
176 | |
177 | if (regno >= 256) |
178 | return 1; |
179 | |
180 | red >>= 8; |
181 | green >>= 8; |
182 | blue >>= 8; |
183 | |
184 | spin_lock_irqsave(&par->lock, flags); |
185 | |
186 | sbus_writel(regno << 24, &bt->addr); |
187 | sbus_writel(red << 24, &bt->color_map); |
188 | sbus_writel(green << 24, &bt->color_map); |
189 | sbus_writel(blue << 24, &bt->color_map); |
190 | |
191 | spin_unlock_irqrestore(&par->lock, flags); |
192 | |
193 | return 0; |
194 | } |
195 | |
196 | /** |
197 | * tcx_blank - Optional function. Blanks the display. |
198 | * @blank_mode: the blank mode we want. |
199 | * @info: frame buffer structure that represents a single frame buffer |
200 | */ |
201 | static int |
202 | tcx_blank(int blank, struct fb_info *info) |
203 | { |
204 | struct tcx_par *par = (struct tcx_par *) info->par; |
205 | struct tcx_thc __iomem *thc = par->thc; |
206 | unsigned long flags; |
207 | u32 val; |
208 | |
209 | spin_lock_irqsave(&par->lock, flags); |
210 | |
211 | val = sbus_readl(&thc->thc_misc); |
212 | |
213 | switch (blank) { |
214 | case FB_BLANK_UNBLANK: /* Unblanking */ |
215 | val &= ~(TCX_THC_MISC_VSYNC_DIS | |
216 | TCX_THC_MISC_HSYNC_DIS); |
217 | val |= TCX_THC_MISC_VIDEO; |
218 | par->flags &= ~TCX_FLAG_BLANKED; |
219 | break; |
220 | |
221 | case FB_BLANK_NORMAL: /* Normal blanking */ |
222 | val &= ~TCX_THC_MISC_VIDEO; |
223 | par->flags |= TCX_FLAG_BLANKED; |
224 | break; |
225 | |
226 | case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */ |
227 | val |= TCX_THC_MISC_VSYNC_DIS; |
228 | break; |
229 | case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */ |
230 | val |= TCX_THC_MISC_HSYNC_DIS; |
231 | break; |
232 | |
233 | case FB_BLANK_POWERDOWN: /* Poweroff */ |
234 | break; |
235 | }; |
236 | |
237 | sbus_writel(val, &thc->thc_misc); |
238 | |
239 | spin_unlock_irqrestore(&par->lock, flags); |
240 | |
241 | return 0; |
242 | } |
243 | |
244 | static struct sbus_mmap_map __tcx_mmap_map[TCX_MMAP_ENTRIES] = { |
245 | { |
246 | .voff = TCX_RAM8BIT, |
247 | .size = SBUS_MMAP_FBSIZE(1) |
248 | }, |
249 | { |
250 | .voff = TCX_RAM24BIT, |
251 | .size = SBUS_MMAP_FBSIZE(4) |
252 | }, |
253 | { |
254 | .voff = TCX_UNK3, |
255 | .size = SBUS_MMAP_FBSIZE(8) |
256 | }, |
257 | { |
258 | .voff = TCX_UNK4, |
259 | .size = SBUS_MMAP_FBSIZE(8) |
260 | }, |
261 | { |
262 | .voff = TCX_CONTROLPLANE, |
263 | .size = SBUS_MMAP_FBSIZE(4) |
264 | }, |
265 | { |
266 | .voff = TCX_UNK6, |
267 | .size = SBUS_MMAP_FBSIZE(8) |
268 | }, |
269 | { |
270 | .voff = TCX_UNK7, |
271 | .size = SBUS_MMAP_FBSIZE(8) |
272 | }, |
273 | { |
274 | .voff = TCX_TEC, |
275 | .size = PAGE_SIZE |
276 | }, |
277 | { |
278 | .voff = TCX_BTREGS, |
279 | .size = PAGE_SIZE |
280 | }, |
281 | { |
282 | .voff = TCX_THC, |
283 | .size = PAGE_SIZE |
284 | }, |
285 | { |
286 | .voff = TCX_DHC, |
287 | .size = PAGE_SIZE |
288 | }, |
289 | { |
290 | .voff = TCX_ALT, |
291 | .size = PAGE_SIZE |
292 | }, |
293 | { |
294 | .voff = TCX_UNK2, |
295 | .size = 0x20000 |
296 | }, |
297 | { .size = 0 } |
298 | }; |
299 | |
300 | static int tcx_mmap(struct fb_info *info, struct vm_area_struct *vma) |
301 | { |
302 | struct tcx_par *par = (struct tcx_par *)info->par; |
303 | |
304 | return sbusfb_mmap_helper(par->mmap_map, |
305 | info->fix.smem_start, info->fix.smem_len, |
306 | par->which_io, vma); |
307 | } |
308 | |
309 | static int tcx_ioctl(struct fb_info *info, unsigned int cmd, |
310 | unsigned long arg) |
311 | { |
312 | struct tcx_par *par = (struct tcx_par *) info->par; |
313 | |
314 | return sbusfb_ioctl_helper(cmd, arg, info, |
315 | FBTYPE_TCXCOLOR, |
316 | (par->lowdepth ? 8 : 24), |
317 | info->fix.smem_len); |
318 | } |
319 | |
320 | /* |
321 | * Initialisation |
322 | */ |
323 | |
324 | static void |
325 | tcx_init_fix(struct fb_info *info, int linebytes) |
326 | { |
327 | struct tcx_par *par = (struct tcx_par *)info->par; |
328 | const char *tcx_name; |
329 | |
330 | if (par->lowdepth) |
331 | tcx_name = "TCX8"; |
332 | else |
333 | tcx_name = "TCX24"; |
334 | |
335 | strlcpy(info->fix.id, tcx_name, sizeof(info->fix.id)); |
336 | |
337 | info->fix.type = FB_TYPE_PACKED_PIXELS; |
338 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
339 | |
340 | info->fix.line_length = linebytes; |
341 | |
342 | info->fix.accel = FB_ACCEL_SUN_TCX; |
343 | } |
344 | |
345 | static void tcx_unmap_regs(struct of_device *op, struct fb_info *info, |
346 | struct tcx_par *par) |
347 | { |
348 | if (par->tec) |
349 | of_iounmap(&op->resource[7], |
350 | par->tec, sizeof(struct tcx_tec)); |
351 | if (par->thc) |
352 | of_iounmap(&op->resource[9], |
353 | par->thc, sizeof(struct tcx_thc)); |
354 | if (par->bt) |
355 | of_iounmap(&op->resource[8], |
356 | par->bt, sizeof(struct bt_regs)); |
357 | if (par->cplane) |
358 | of_iounmap(&op->resource[4], |
359 | par->cplane, info->fix.smem_len * sizeof(u32)); |
360 | if (info->screen_base) |
361 | of_iounmap(&op->resource[0], |
362 | info->screen_base, info->fix.smem_len); |
363 | } |
364 | |
365 | static int __devinit tcx_probe(struct of_device *op, |
366 | const struct of_device_id *match) |
367 | { |
368 | struct device_node *dp = op->node; |
369 | struct fb_info *info; |
370 | struct tcx_par *par; |
371 | int linebytes, i, err; |
372 | |
373 | info = framebuffer_alloc(sizeof(struct tcx_par), &op->dev); |
374 | |
375 | err = -ENOMEM; |
376 | if (!info) |
377 | goto out_err; |
378 | par = info->par; |
379 | |
380 | spin_lock_init(&par->lock); |
381 | |
382 | par->lowdepth = |
383 | (of_find_property(dp, "tcx-8-bit", NULL) != NULL); |
384 | |
385 | sbusfb_fill_var(&info->var, dp, 8); |
386 | info->var.red.length = 8; |
387 | info->var.green.length = 8; |
388 | info->var.blue.length = 8; |
389 | |
390 | linebytes = of_getintprop_default(dp, "linebytes", |
391 | info->var.xres); |
392 | info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres); |
393 | |
394 | par->tec = of_ioremap(&op->resource[7], 0, |
395 | sizeof(struct tcx_tec), "tcx tec"); |
396 | par->thc = of_ioremap(&op->resource[9], 0, |
397 | sizeof(struct tcx_thc), "tcx thc"); |
398 | par->bt = of_ioremap(&op->resource[8], 0, |
399 | sizeof(struct bt_regs), "tcx dac"); |
400 | info->screen_base = of_ioremap(&op->resource[0], 0, |
401 | info->fix.smem_len, "tcx ram"); |
402 | if (!par->tec || !par->thc || |
403 | !par->bt || !info->screen_base) |
404 | goto out_unmap_regs; |
405 | |
406 | memcpy(&par->mmap_map, &__tcx_mmap_map, sizeof(par->mmap_map)); |
407 | if (!par->lowdepth) { |
408 | par->cplane = of_ioremap(&op->resource[4], 0, |
409 | info->fix.smem_len * sizeof(u32), |
410 | "tcx cplane"); |
411 | if (!par->cplane) |
412 | goto out_unmap_regs; |
413 | } else { |
414 | par->mmap_map[1].size = SBUS_MMAP_EMPTY; |
415 | par->mmap_map[4].size = SBUS_MMAP_EMPTY; |
416 | par->mmap_map[5].size = SBUS_MMAP_EMPTY; |
417 | par->mmap_map[6].size = SBUS_MMAP_EMPTY; |
418 | } |
419 | |
420 | info->fix.smem_start = op->resource[0].start; |
421 | par->which_io = op->resource[0].flags & IORESOURCE_BITS; |
422 | |
423 | for (i = 0; i < TCX_MMAP_ENTRIES; i++) { |
424 | int j; |
425 | |
426 | switch (i) { |
427 | case 10: |
428 | j = 12; |
429 | break; |
430 | |
431 | case 11: case 12: |
432 | j = i - 1; |
433 | break; |
434 | |
435 | default: |
436 | j = i; |
437 | break; |
438 | }; |
439 | par->mmap_map[i].poff = op->resource[j].start; |
440 | } |
441 | |
442 | info->flags = FBINFO_DEFAULT; |
443 | info->fbops = &tcx_ops; |
444 | |
445 | /* Initialize brooktree DAC. */ |
446 | sbus_writel(0x04 << 24, &par->bt->addr); /* color planes */ |
447 | sbus_writel(0xff << 24, &par->bt->control); |
448 | sbus_writel(0x05 << 24, &par->bt->addr); |
449 | sbus_writel(0x00 << 24, &par->bt->control); |
450 | sbus_writel(0x06 << 24, &par->bt->addr); /* overlay plane */ |
451 | sbus_writel(0x73 << 24, &par->bt->control); |
452 | sbus_writel(0x07 << 24, &par->bt->addr); |
453 | sbus_writel(0x00 << 24, &par->bt->control); |
454 | |
455 | tcx_reset(info); |
456 | |
457 | tcx_blank(FB_BLANK_UNBLANK, info); |
458 | |
459 | if (fb_alloc_cmap(&info->cmap, 256, 0)) |
460 | goto out_unmap_regs; |
461 | |
462 | fb_set_cmap(&info->cmap, info); |
463 | tcx_init_fix(info, linebytes); |
464 | |
465 | err = register_framebuffer(info); |
466 | if (err < 0) |
467 | goto out_dealloc_cmap; |
468 | |
469 | dev_set_drvdata(&op->dev, info); |
470 | |
471 | printk(KERN_INFO "%s: TCX at %lx:%lx, %s\n", |
472 | dp->full_name, |
473 | par->which_io, |
474 | info->fix.smem_start, |
475 | par->lowdepth ? "8-bit only" : "24-bit depth"); |
476 | |
477 | return 0; |
478 | |
479 | out_dealloc_cmap: |
480 | fb_dealloc_cmap(&info->cmap); |
481 | |
482 | out_unmap_regs: |
483 | tcx_unmap_regs(op, info, par); |
484 | |
485 | out_err: |
486 | return err; |
487 | } |
488 | |
489 | static int __devexit tcx_remove(struct of_device *op) |
490 | { |
491 | struct fb_info *info = dev_get_drvdata(&op->dev); |
492 | struct tcx_par *par = info->par; |
493 | |
494 | unregister_framebuffer(info); |
495 | fb_dealloc_cmap(&info->cmap); |
496 | |
497 | tcx_unmap_regs(op, info, par); |
498 | |
499 | framebuffer_release(info); |
500 | |
501 | dev_set_drvdata(&op->dev, NULL); |
502 | |
503 | return 0; |
504 | } |
505 | |
506 | static const struct of_device_id tcx_match[] = { |
507 | { |
508 | .name = "SUNW,tcx", |
509 | }, |
510 | {}, |
511 | }; |
512 | MODULE_DEVICE_TABLE(of, tcx_match); |
513 | |
514 | static struct of_platform_driver tcx_driver = { |
515 | .name = "tcx", |
516 | .match_table = tcx_match, |
517 | .probe = tcx_probe, |
518 | .remove = __devexit_p(tcx_remove), |
519 | }; |
520 | |
521 | static int __init tcx_init(void) |
522 | { |
523 | if (fb_get_options("tcxfb", NULL)) |
524 | return -ENODEV; |
525 | |
526 | return of_register_driver(&tcx_driver, &of_bus_type); |
527 | } |
528 | |
529 | static void __exit tcx_exit(void) |
530 | { |
531 | of_unregister_driver(&tcx_driver); |
532 | } |
533 | |
534 | module_init(tcx_init); |
535 | module_exit(tcx_exit); |
536 | |
537 | MODULE_DESCRIPTION("framebuffer driver for TCX chipsets"); |
538 | MODULE_AUTHOR("David S. Miller <davem@davemloft.net>"); |
539 | MODULE_VERSION("2.0"); |
540 | MODULE_LICENSE("GPL"); |
541 |
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