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1da177e4 LT |
1 | /* tcx.c: TCX frame buffer driver |
2 | * | |
3 | * Copyright (C) 2003 David S. Miller (davem@redhat.com) | |
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/slab.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/fb.h> | |
19 | #include <linux/mm.h> | |
20 | ||
21 | #include <asm/io.h> | |
22 | #include <asm/sbus.h> | |
23 | #include <asm/oplib.h> | |
24 | #include <asm/fbio.h> | |
25 | ||
26 | #include "sbuslib.h" | |
27 | ||
28 | /* | |
29 | * Local functions. | |
30 | */ | |
31 | ||
32 | static int tcx_setcolreg(unsigned, unsigned, unsigned, unsigned, | |
33 | unsigned, struct fb_info *); | |
34 | static int tcx_blank(int, struct fb_info *); | |
35 | ||
36 | static int tcx_mmap(struct fb_info *, struct file *, struct vm_area_struct *); | |
37 | static int tcx_ioctl(struct inode *, struct file *, unsigned int, | |
38 | unsigned long, struct fb_info *); | |
6ee7c152 | 39 | static int tcx_pan_display(struct fb_var_screeninfo *, struct fb_info *); |
1da177e4 LT |
40 | |
41 | /* | |
42 | * Frame buffer operations | |
43 | */ | |
44 | ||
45 | static struct fb_ops tcx_ops = { | |
46 | .owner = THIS_MODULE, | |
47 | .fb_setcolreg = tcx_setcolreg, | |
48 | .fb_blank = tcx_blank, | |
6ee7c152 | 49 | .fb_pan_display = tcx_pan_display, |
1da177e4 LT |
50 | .fb_fillrect = cfb_fillrect, |
51 | .fb_copyarea = cfb_copyarea, | |
52 | .fb_imageblit = cfb_imageblit, | |
53 | .fb_mmap = tcx_mmap, | |
54 | .fb_ioctl = tcx_ioctl, | |
55 | .fb_cursor = soft_cursor, | |
56 | }; | |
57 | ||
58 | /* THC definitions */ | |
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 | |
76 | ||
77 | /* The contents are unknown */ | |
78 | struct tcx_tec { | |
79 | volatile u32 tec_matrix; | |
80 | volatile u32 tec_clip; | |
81 | volatile u32 tec_vdc; | |
82 | }; | |
83 | ||
84 | struct tcx_thc { | |
85 | volatile u32 thc_rev; | |
86 | u32 thc_pad0[511]; | |
87 | volatile u32 thc_hs; /* hsync timing */ | |
88 | volatile u32 thc_hsdvs; | |
89 | volatile u32 thc_hd; | |
90 | volatile u32 thc_vs; /* vsync timing */ | |
91 | volatile u32 thc_vd; | |
92 | volatile u32 thc_refresh; | |
93 | volatile u32 thc_misc; | |
94 | u32 thc_pad1[56]; | |
95 | volatile u32 thc_cursxy; /* cursor x,y position (16 bits each) */ | |
96 | volatile u32 thc_cursmask[32]; /* cursor mask bits */ | |
97 | volatile u32 thc_cursbits[32]; /* what to show where mask enabled */ | |
98 | }; | |
99 | ||
100 | struct bt_regs { | |
101 | volatile u32 addr; | |
102 | volatile u32 color_map; | |
103 | volatile u32 control; | |
104 | volatile u32 cursor; | |
105 | }; | |
106 | ||
107 | #define TCX_MMAP_ENTRIES 14 | |
108 | ||
109 | struct tcx_par { | |
110 | spinlock_t lock; | |
111 | struct bt_regs __iomem *bt; | |
112 | struct tcx_thc __iomem *thc; | |
113 | struct tcx_tec __iomem *tec; | |
114 | volatile u32 __iomem *cplane; | |
115 | ||
116 | u32 flags; | |
117 | #define TCX_FLAG_BLANKED 0x00000001 | |
118 | ||
119 | unsigned long physbase; | |
120 | unsigned long fbsize; | |
121 | ||
122 | struct sbus_mmap_map mmap_map[TCX_MMAP_ENTRIES]; | |
123 | int lowdepth; | |
124 | ||
125 | struct sbus_dev *sdev; | |
126 | struct list_head list; | |
127 | }; | |
128 | ||
129 | /* Reset control plane so that WID is 8-bit plane. */ | |
130 | static void __tcx_set_control_plane (struct tcx_par *par) | |
131 | { | |
132 | volatile u32 __iomem *p, *pend; | |
133 | ||
134 | if (par->lowdepth) | |
135 | return; | |
136 | ||
137 | p = par->cplane; | |
138 | if (p == NULL) | |
139 | return; | |
140 | for (pend = p + par->fbsize; p < pend; p++) { | |
141 | u32 tmp = sbus_readl(p); | |
142 | ||
143 | tmp &= 0xffffff; | |
144 | sbus_writel(tmp, p); | |
145 | } | |
146 | } | |
147 | ||
148 | static void tcx_reset (struct fb_info *info) | |
149 | { | |
150 | struct tcx_par *par = (struct tcx_par *) info->par; | |
151 | unsigned long flags; | |
152 | ||
153 | spin_lock_irqsave(&par->lock, flags); | |
154 | __tcx_set_control_plane(par); | |
155 | spin_unlock_irqrestore(&par->lock, flags); | |
156 | } | |
157 | ||
6ee7c152 TC |
158 | static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) |
159 | { | |
160 | tcx_reset(info); | |
161 | return 0; | |
162 | } | |
163 | ||
1da177e4 LT |
164 | /** |
165 | * tcx_setcolreg - Optional function. Sets a color register. | |
166 | * @regno: boolean, 0 copy local, 1 get_user() function | |
167 | * @red: frame buffer colormap structure | |
168 | * @green: The green value which can be up to 16 bits wide | |
169 | * @blue: The blue value which can be up to 16 bits wide. | |
170 | * @transp: If supported the alpha value which can be up to 16 bits wide. | |
171 | * @info: frame buffer info structure | |
172 | */ | |
173 | static int tcx_setcolreg(unsigned regno, | |
174 | unsigned red, unsigned green, unsigned blue, | |
175 | unsigned transp, struct fb_info *info) | |
176 | { | |
177 | struct tcx_par *par = (struct tcx_par *) info->par; | |
178 | struct bt_regs __iomem *bt = par->bt; | |
179 | unsigned long flags; | |
180 | ||
181 | if (regno >= 256) | |
182 | return 1; | |
183 | ||
184 | red >>= 8; | |
185 | green >>= 8; | |
186 | blue >>= 8; | |
187 | ||
188 | spin_lock_irqsave(&par->lock, flags); | |
189 | ||
190 | sbus_writel(regno << 24, &bt->addr); | |
191 | sbus_writel(red << 24, &bt->color_map); | |
192 | sbus_writel(green << 24, &bt->color_map); | |
193 | sbus_writel(blue << 24, &bt->color_map); | |
194 | ||
195 | spin_unlock_irqrestore(&par->lock, flags); | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
200 | /** | |
201 | * tcx_blank - Optional function. Blanks the display. | |
202 | * @blank_mode: the blank mode we want. | |
203 | * @info: frame buffer structure that represents a single frame buffer | |
204 | */ | |
205 | static int | |
206 | tcx_blank(int blank, struct fb_info *info) | |
207 | { | |
208 | struct tcx_par *par = (struct tcx_par *) info->par; | |
209 | struct tcx_thc __iomem *thc = par->thc; | |
210 | unsigned long flags; | |
211 | u32 val; | |
212 | ||
213 | spin_lock_irqsave(&par->lock, flags); | |
214 | ||
215 | val = sbus_readl(&thc->thc_misc); | |
216 | ||
217 | switch (blank) { | |
218 | case FB_BLANK_UNBLANK: /* Unblanking */ | |
219 | val &= ~(TCX_THC_MISC_VSYNC_DIS | | |
220 | TCX_THC_MISC_HSYNC_DIS); | |
221 | val |= TCX_THC_MISC_VIDEO; | |
222 | par->flags &= ~TCX_FLAG_BLANKED; | |
223 | break; | |
224 | ||
225 | case FB_BLANK_NORMAL: /* Normal blanking */ | |
226 | val &= ~TCX_THC_MISC_VIDEO; | |
227 | par->flags |= TCX_FLAG_BLANKED; | |
228 | break; | |
229 | ||
230 | case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */ | |
231 | val |= TCX_THC_MISC_VSYNC_DIS; | |
232 | break; | |
233 | case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */ | |
234 | val |= TCX_THC_MISC_HSYNC_DIS; | |
235 | break; | |
236 | ||
237 | case FB_BLANK_POWERDOWN: /* Poweroff */ | |
238 | break; | |
239 | }; | |
240 | ||
241 | sbus_writel(val, &thc->thc_misc); | |
242 | ||
243 | spin_unlock_irqrestore(&par->lock, flags); | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
248 | static struct sbus_mmap_map __tcx_mmap_map[TCX_MMAP_ENTRIES] = { | |
249 | { | |
250 | .voff = TCX_RAM8BIT, | |
251 | .size = SBUS_MMAP_FBSIZE(1) | |
252 | }, | |
253 | { | |
254 | .voff = TCX_RAM24BIT, | |
255 | .size = SBUS_MMAP_FBSIZE(4) | |
256 | }, | |
257 | { | |
258 | .voff = TCX_UNK3, | |
259 | .size = SBUS_MMAP_FBSIZE(8) | |
260 | }, | |
261 | { | |
262 | .voff = TCX_UNK4, | |
263 | .size = SBUS_MMAP_FBSIZE(8) | |
264 | }, | |
265 | { | |
266 | .voff = TCX_CONTROLPLANE, | |
267 | .size = SBUS_MMAP_FBSIZE(4) | |
268 | }, | |
269 | { | |
270 | .voff = TCX_UNK6, | |
271 | .size = SBUS_MMAP_FBSIZE(8) | |
272 | }, | |
273 | { | |
274 | .voff = TCX_UNK7, | |
275 | .size = SBUS_MMAP_FBSIZE(8) | |
276 | }, | |
277 | { | |
278 | .voff = TCX_TEC, | |
279 | .size = PAGE_SIZE | |
280 | }, | |
281 | { | |
282 | .voff = TCX_BTREGS, | |
283 | .size = PAGE_SIZE | |
284 | }, | |
285 | { | |
286 | .voff = TCX_THC, | |
287 | .size = PAGE_SIZE | |
288 | }, | |
289 | { | |
290 | .voff = TCX_DHC, | |
291 | .size = PAGE_SIZE | |
292 | }, | |
293 | { | |
294 | .voff = TCX_ALT, | |
295 | .size = PAGE_SIZE | |
296 | }, | |
297 | { | |
298 | .voff = TCX_UNK2, | |
299 | .size = 0x20000 | |
300 | }, | |
301 | { .size = 0 } | |
302 | }; | |
303 | ||
304 | static int tcx_mmap(struct fb_info *info, struct file *file, struct vm_area_struct *vma) | |
305 | { | |
306 | struct tcx_par *par = (struct tcx_par *)info->par; | |
307 | ||
308 | return sbusfb_mmap_helper(par->mmap_map, | |
309 | par->physbase, par->fbsize, | |
310 | par->sdev->reg_addrs[0].which_io, | |
311 | vma); | |
312 | } | |
313 | ||
314 | static int tcx_ioctl(struct inode *inode, struct file *file, unsigned int cmd, | |
315 | unsigned long arg, struct fb_info *info) | |
316 | { | |
317 | struct tcx_par *par = (struct tcx_par *) info->par; | |
318 | ||
319 | return sbusfb_ioctl_helper(cmd, arg, info, | |
320 | FBTYPE_TCXCOLOR, | |
321 | (par->lowdepth ? 8 : 24), | |
322 | par->fbsize); | |
323 | } | |
324 | ||
325 | /* | |
326 | * Initialisation | |
327 | */ | |
328 | ||
329 | static void | |
330 | tcx_init_fix(struct fb_info *info, int linebytes) | |
331 | { | |
332 | struct tcx_par *par = (struct tcx_par *)info->par; | |
333 | const char *tcx_name; | |
334 | ||
335 | if (par->lowdepth) | |
336 | tcx_name = "TCX8"; | |
337 | else | |
338 | tcx_name = "TCX24"; | |
339 | ||
340 | strlcpy(info->fix.id, tcx_name, sizeof(info->fix.id)); | |
341 | ||
342 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
343 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; | |
344 | ||
345 | info->fix.line_length = linebytes; | |
346 | ||
347 | info->fix.accel = FB_ACCEL_SUN_TCX; | |
348 | } | |
349 | ||
350 | struct all_info { | |
351 | struct fb_info info; | |
352 | struct tcx_par par; | |
353 | struct list_head list; | |
354 | }; | |
355 | static LIST_HEAD(tcx_list); | |
356 | ||
357 | static void tcx_init_one(struct sbus_dev *sdev) | |
358 | { | |
359 | struct all_info *all; | |
360 | int linebytes, i; | |
361 | ||
362 | all = kmalloc(sizeof(*all), GFP_KERNEL); | |
363 | if (!all) { | |
364 | printk(KERN_ERR "tcx: Cannot allocate memory.\n"); | |
365 | return; | |
366 | } | |
367 | memset(all, 0, sizeof(*all)); | |
368 | ||
369 | INIT_LIST_HEAD(&all->list); | |
370 | ||
371 | spin_lock_init(&all->par.lock); | |
372 | all->par.sdev = sdev; | |
373 | ||
374 | all->par.lowdepth = prom_getbool(sdev->prom_node, "tcx-8-bit"); | |
375 | ||
376 | sbusfb_fill_var(&all->info.var, sdev->prom_node, 8); | |
6ee7c152 TC |
377 | all->info.var.red.length = 8; |
378 | all->info.var.green.length = 8; | |
379 | all->info.var.blue.length = 8; | |
1da177e4 LT |
380 | |
381 | linebytes = prom_getintdefault(sdev->prom_node, "linebytes", | |
382 | all->info.var.xres); | |
383 | all->par.fbsize = PAGE_ALIGN(linebytes * all->info.var.yres); | |
384 | ||
385 | all->par.tec = sbus_ioremap(&sdev->resource[7], 0, | |
386 | sizeof(struct tcx_tec), "tcx tec"); | |
387 | all->par.thc = sbus_ioremap(&sdev->resource[9], 0, | |
388 | sizeof(struct tcx_thc), "tcx thc"); | |
389 | all->par.bt = sbus_ioremap(&sdev->resource[8], 0, | |
390 | sizeof(struct bt_regs), "tcx dac"); | |
391 | memcpy(&all->par.mmap_map, &__tcx_mmap_map, sizeof(all->par.mmap_map)); | |
392 | if (!all->par.lowdepth) { | |
393 | all->par.cplane = sbus_ioremap(&sdev->resource[4], 0, | |
394 | all->par.fbsize * sizeof(u32), "tcx cplane"); | |
395 | } else { | |
396 | all->par.mmap_map[1].size = SBUS_MMAP_EMPTY; | |
397 | all->par.mmap_map[4].size = SBUS_MMAP_EMPTY; | |
398 | all->par.mmap_map[5].size = SBUS_MMAP_EMPTY; | |
399 | all->par.mmap_map[6].size = SBUS_MMAP_EMPTY; | |
400 | } | |
401 | ||
402 | all->par.physbase = 0; | |
403 | for (i = 0; i < TCX_MMAP_ENTRIES; i++) { | |
404 | int j; | |
405 | ||
406 | switch (i) { | |
407 | case 10: | |
408 | j = 12; | |
409 | break; | |
410 | ||
411 | case 11: case 12: | |
412 | j = i - 1; | |
413 | break; | |
414 | ||
415 | default: | |
416 | j = i; | |
417 | break; | |
418 | }; | |
419 | all->par.mmap_map[i].poff = sdev->reg_addrs[j].phys_addr; | |
420 | } | |
421 | ||
422 | all->info.flags = FBINFO_DEFAULT; | |
423 | all->info.fbops = &tcx_ops; | |
424 | #ifdef CONFIG_SPARC32 | |
425 | all->info.screen_base = (char __iomem *) | |
426 | prom_getintdefault(sdev->prom_node, "address", 0); | |
427 | #endif | |
428 | if (!all->info.screen_base) | |
429 | all->info.screen_base = sbus_ioremap(&sdev->resource[0], 0, | |
430 | all->par.fbsize, "tcx ram"); | |
431 | all->info.par = &all->par; | |
432 | ||
433 | /* Initialize brooktree DAC. */ | |
434 | sbus_writel(0x04 << 24, &all->par.bt->addr); /* color planes */ | |
435 | sbus_writel(0xff << 24, &all->par.bt->control); | |
436 | sbus_writel(0x05 << 24, &all->par.bt->addr); | |
437 | sbus_writel(0x00 << 24, &all->par.bt->control); | |
438 | sbus_writel(0x06 << 24, &all->par.bt->addr); /* overlay plane */ | |
439 | sbus_writel(0x73 << 24, &all->par.bt->control); | |
440 | sbus_writel(0x07 << 24, &all->par.bt->addr); | |
441 | sbus_writel(0x00 << 24, &all->par.bt->control); | |
442 | ||
443 | tcx_reset(&all->info); | |
444 | ||
445 | tcx_blank(0, &all->info); | |
446 | ||
447 | if (fb_alloc_cmap(&all->info.cmap, 256, 0)) { | |
448 | printk(KERN_ERR "tcx: Could not allocate color map.\n"); | |
449 | kfree(all); | |
450 | return; | |
451 | } | |
452 | ||
6ee7c152 | 453 | fb_set_cmap(&all->info.cmap, &all->info); |
1da177e4 LT |
454 | tcx_init_fix(&all->info, linebytes); |
455 | ||
456 | if (register_framebuffer(&all->info) < 0) { | |
457 | printk(KERN_ERR "tcx: Could not register framebuffer.\n"); | |
458 | fb_dealloc_cmap(&all->info.cmap); | |
459 | kfree(all); | |
460 | return; | |
461 | } | |
462 | ||
463 | list_add(&all->list, &tcx_list); | |
464 | ||
465 | printk("tcx: %s at %lx:%lx, %s\n", | |
466 | sdev->prom_name, | |
467 | (long) sdev->reg_addrs[0].which_io, | |
468 | (long) sdev->reg_addrs[0].phys_addr, | |
469 | all->par.lowdepth ? "8-bit only" : "24-bit depth"); | |
470 | } | |
471 | ||
472 | int __init tcx_init(void) | |
473 | { | |
474 | struct sbus_bus *sbus; | |
475 | struct sbus_dev *sdev; | |
476 | ||
477 | if (fb_get_options("tcxfb", NULL)) | |
478 | return -ENODEV; | |
479 | ||
480 | for_all_sbusdev(sdev, sbus) { | |
6ee7c152 | 481 | if (!strcmp(sdev->prom_name, "SUNW,tcx")) |
1da177e4 LT |
482 | tcx_init_one(sdev); |
483 | } | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | void __exit tcx_exit(void) | |
489 | { | |
490 | struct list_head *pos, *tmp; | |
491 | ||
492 | list_for_each_safe(pos, tmp, &tcx_list) { | |
493 | struct all_info *all = list_entry(pos, typeof(*all), list); | |
494 | ||
495 | unregister_framebuffer(&all->info); | |
496 | fb_dealloc_cmap(&all->info.cmap); | |
497 | kfree(all); | |
498 | } | |
499 | } | |
500 | ||
501 | int __init | |
502 | tcx_setup(char *arg) | |
503 | { | |
504 | /* No cmdline options yet... */ | |
505 | return 0; | |
506 | } | |
507 | ||
508 | module_init(tcx_init); | |
509 | ||
510 | #ifdef MODULE | |
511 | module_exit(tcx_exit); | |
512 | #endif | |
513 | ||
514 | MODULE_DESCRIPTION("framebuffer driver for TCX chipsets"); | |
515 | MODULE_AUTHOR("David S. Miller <davem@redhat.com>"); | |
516 | MODULE_LICENSE("GPL"); |