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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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
32static int tcx_setcolreg(unsigned, unsigned, unsigned, unsigned,
33 unsigned, struct fb_info *);
34static int tcx_blank(int, struct fb_info *);
35
36static int tcx_mmap(struct fb_info *, struct file *, struct vm_area_struct *);
37static int tcx_ioctl(struct inode *, struct file *, unsigned int,
38 unsigned long, struct fb_info *);
Tom 'spot' Callaway6ee7c152005-04-24 20:39:15 -070039static int tcx_pan_display(struct fb_var_screeninfo *, struct fb_info *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41/*
42 * Frame buffer operations
43 */
44
45static struct fb_ops tcx_ops = {
46 .owner = THIS_MODULE,
47 .fb_setcolreg = tcx_setcolreg,
48 .fb_blank = tcx_blank,
Tom 'spot' Callaway6ee7c152005-04-24 20:39:15 -070049 .fb_pan_display = tcx_pan_display,
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 .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 */
78struct tcx_tec {
79 volatile u32 tec_matrix;
80 volatile u32 tec_clip;
81 volatile u32 tec_vdc;
82};
83
84struct 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
100struct 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
109struct 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. */
130static 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
148static 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
Tom 'spot' Callaway6ee7c152005-04-24 20:39:15 -0700158static int tcx_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
159{
160 tcx_reset(info);
161 return 0;
162}
163
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164/**
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 */
173static 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 */
205static int
206tcx_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
248static 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
304static 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
314static 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
329static void
330tcx_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
350struct all_info {
351 struct fb_info info;
352 struct tcx_par par;
353 struct list_head list;
354};
355static LIST_HEAD(tcx_list);
356
357static 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);
Tom 'spot' Callaway6ee7c152005-04-24 20:39:15 -0700377 all->info.var.red.length = 8;
378 all->info.var.green.length = 8;
379 all->info.var.blue.length = 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
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
Tom 'spot' Callaway6ee7c152005-04-24 20:39:15 -0700453 fb_set_cmap(&all->info.cmap, &all->info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 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
472int __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) {
Tom 'spot' Callaway6ee7c152005-04-24 20:39:15 -0700481 if (!strcmp(sdev->prom_name, "SUNW,tcx"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 tcx_init_one(sdev);
483 }
484
485 return 0;
486}
487
488void __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
501int __init
502tcx_setup(char *arg)
503{
504 /* No cmdline options yet... */
505 return 0;
506}
507
508module_init(tcx_init);
509
510#ifdef MODULE
511module_exit(tcx_exit);
512#endif
513
514MODULE_DESCRIPTION("framebuffer driver for TCX chipsets");
515MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
516MODULE_LICENSE("GPL");