1 /* $Id: cgfourteenfb.c,v 1.11 2001/09/19 00:04:33 davem Exp $
2 * cgfourteenfb.c: CGfourteen frame buffer driver
3 *
4 * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
5 * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
6 */
7
8 #include <linux/module.h>
9 #include <linux/sched.h>
10 #include <linux/kernel.h>
11 #include <linux/errno.h>
12 #include <linux/string.h>
13 #include <linux/mm.h>
14 #include <linux/tty.h>
15 #include <linux/slab.h>
16 #include <linux/vmalloc.h>
17 #include <linux/delay.h>
18 #include <linux/interrupt.h>
19 #include <linux/fb.h>
20 #include <linux/init.h>
21 #include <linux/selection.h>
22
23 #include <video/sbusfb.h>
24 #include <asm/io.h>
25 #include <asm/pgtable.h>
26 #include <asm/uaccess.h>
27
28 #include <video/fbcon-cfb8.h>
29
30 #define CG14_MCR_INTENABLE_SHIFT 7
31 #define CG14_MCR_INTENABLE_MASK 0x80
32 #define CG14_MCR_VIDENABLE_SHIFT 6
33 #define CG14_MCR_VIDENABLE_MASK 0x40
34 #define CG14_MCR_PIXMODE_SHIFT 4
35 #define CG14_MCR_PIXMODE_MASK 0x30
36 #define CG14_MCR_TMR_SHIFT 2
37 #define CG14_MCR_TMR_MASK 0x0c
38 #define CG14_MCR_TMENABLE_SHIFT 1
39 #define CG14_MCR_TMENABLE_MASK 0x02
40 #define CG14_MCR_RESET_SHIFT 0
41 #define CG14_MCR_RESET_MASK 0x01
42 #define CG14_REV_REVISION_SHIFT 4
43 #define CG14_REV_REVISION_MASK 0xf0
44 #define CG14_REV_IMPL_SHIFT 0
45 #define CG14_REV_IMPL_MASK 0x0f
46 #define CG14_VBR_FRAMEBASE_SHIFT 12
47 #define CG14_VBR_FRAMEBASE_MASK 0x00fff000
48 #define CG14_VMCR1_SETUP_SHIFT 0
49 #define CG14_VMCR1_SETUP_MASK 0x000001ff
50 #define CG14_VMCR1_VCONFIG_SHIFT 9
51 #define CG14_VMCR1_VCONFIG_MASK 0x00000e00
52 #define CG14_VMCR2_REFRESH_SHIFT 0
53 #define CG14_VMCR2_REFRESH_MASK 0x00000001
54 #define CG14_VMCR2_TESTROWCNT_SHIFT 1
55 #define CG14_VMCR2_TESTROWCNT_MASK 0x00000002
56 #define CG14_VMCR2_FBCONFIG_SHIFT 2
57 #define CG14_VMCR2_FBCONFIG_MASK 0x0000000c
58 #define CG14_VCR_REFRESHREQ_SHIFT 0
59 #define CG14_VCR_REFRESHREQ_MASK 0x000003ff
60 #define CG14_VCR1_REFRESHENA_SHIFT 10
61 #define CG14_VCR1_REFRESHENA_MASK 0x00000400
62 #define CG14_VCA_CAD_SHIFT 0
63 #define CG14_VCA_CAD_MASK 0x000003ff
64 #define CG14_VCA_VERS_SHIFT 10
65 #define CG14_VCA_VERS_MASK 0x00000c00
66 #define CG14_VCA_RAMSPEED_SHIFT 12
67 #define CG14_VCA_RAMSPEED_MASK 0x00001000
68 #define CG14_VCA_8MB_SHIFT 13
69 #define CG14_VCA_8MB_MASK 0x00002000
70
71 #define CG14_MCR_PIXMODE_8 0
72 #define CG14_MCR_PIXMODE_16 2
73 #define CG14_MCR_PIXMODE_32 3
74
75 MODULE_LICENSE("GPL");
76
77 struct cg14_regs{
78 volatile u8 mcr; /* Master Control Reg */
79 volatile u8 ppr; /* Packed Pixel Reg */
80 volatile u8 tms[2]; /* Test Mode Status Regs */
81 volatile u8 msr; /* Master Status Reg */
82 volatile u8 fsr; /* Fault Status Reg */
83 volatile u8 rev; /* Revision & Impl */
84 volatile u8 ccr; /* Clock Control Reg */
85 volatile u32 tmr; /* Test Mode Read Back */
86 volatile u8 mod; /* Monitor Operation Data Reg */
87 volatile u8 acr; /* Aux Control */
88 u8 xxx0[6];
89 volatile u16 hct; /* Hor Counter */
90 volatile u16 vct; /* Vert Counter */
91 volatile u16 hbs; /* Hor Blank Start */
92 volatile u16 hbc; /* Hor Blank Clear */
93 volatile u16 hss; /* Hor Sync Start */
94 volatile u16 hsc; /* Hor Sync Clear */
95 volatile u16 csc; /* Composite Sync Clear */
96 volatile u16 vbs; /* Vert Blank Start */
97 volatile u16 vbc; /* Vert Blank Clear */
98 volatile u16 vss; /* Vert Sync Start */
99 volatile u16 vsc; /* Vert Sync Clear */
100 volatile u16 xcs;
101 volatile u16 xcc;
102 volatile u16 fsa; /* Fault Status Address */
103 volatile u16 adr; /* Address Registers */
104 u8 xxx1[0xce];
105 volatile u8 pcg[0x100]; /* Pixel Clock Generator */
106 volatile u32 vbr; /* Frame Base Row */
107 volatile u32 vmcr; /* VBC Master Control */
108 volatile u32 vcr; /* VBC refresh */
109 volatile u32 vca; /* VBC Config */
110 };
111
112 #define CG14_CCR_ENABLE 0x04
113 #define CG14_CCR_SELECT 0x02 /* HW/Full screen */
114
115 struct cg14_cursor {
116 volatile u32 cpl0[32]; /* Enable plane 0 */
117 volatile u32 cpl1[32]; /* Color selection plane */
118 volatile u8 ccr; /* Cursor Control Reg */
119 u8 xxx0[3];
120 volatile u16 cursx; /* Cursor x,y position */
121 volatile u16 cursy; /* Cursor x,y position */
122 volatile u32 color0;
123 volatile u32 color1;
124 u32 xxx1[0x1bc];
125 volatile u32 cpl0i[32]; /* Enable plane 0 autoinc */
126 volatile u32 cpl1i[32]; /* Color selection autoinc */
127 };
128
129 struct cg14_dac {
130 volatile u8 addr; /* Address Register */
131 u8 xxx0[255];
132 volatile u8 glut; /* Gamma table */
133 u8 xxx1[255];
134 volatile u8 select; /* Register Select */
135 u8 xxx2[255];
136 volatile u8 mode; /* Mode Register */
137 };
138
139 struct cg14_xlut{
140 volatile u8 x_xlut [256];
141 volatile u8 x_xlutd [256];
142 u8 xxx0[0x600];
143 volatile u8 x_xlut_inc [256];
144 volatile u8 x_xlutd_inc [256];
145 };
146
147 /* Color look up table (clut) */
148 /* Each one of these arrays hold the color lookup table (for 256
149 * colors) for each MDI page (I assume then there should be 4 MDI
150 * pages, I still wonder what they are. I have seen NeXTStep split
151 * the screen in four parts, while operating in 24 bits mode. Each
152 * integer holds 4 values: alpha value (transparency channel, thanks
153 * go to John Stone (johns@umr.edu) from OpenBSD), red, green and blue
154 *
155 * I currently use the clut instead of the Xlut
156 */
157 struct cg14_clut {
158 u32 c_clut [256];
159 u32 c_clutd [256]; /* i wonder what the 'd' is for */
160 u32 c_clut_inc [256];
161 u32 c_clutd_inc [256];
162 };
163
164 static struct sbus_mmap_map cg14_mmap_map[] __initdata = {
165 { CG14_REGS, 0x80000000, 0x1000 },
166 { CG14_XLUT, 0x80003000, 0x1000 },
167 { CG14_CLUT1, 0x80004000, 0x1000 },
168 { CG14_CLUT2, 0x80005000, 0x1000 },
169 { CG14_CLUT3, 0x80006000, 0x1000 },
170 { CG3_MMAP_OFFSET -
171 0x7000, 0x80000000, 0x7000 },
172 { CG3_MMAP_OFFSET, 0x00000000, SBUS_MMAP_FBSIZE(1) },
173 { MDI_CURSOR_MAP, 0x80001000, 0x1000 },
174 { MDI_CHUNKY_BGR_MAP, 0x01000000, 0x400000 },
175 { MDI_PLANAR_X16_MAP, 0x02000000, 0x200000 },
176 { MDI_PLANAR_C16_MAP, 0x02800000, 0x200000 },
177 { MDI_PLANAR_X32_MAP, 0x03000000, 0x100000 },
178 { MDI_PLANAR_B32_MAP, 0x03400000, 0x100000 },
179 { MDI_PLANAR_G32_MAP, 0x03800000, 0x100000 },
180 { MDI_PLANAR_R32_MAP, 0x03c00000, 0x100000 },
181 { 0, 0, 0 }
182 };
183
cg14_loadcmap(struct fb_info_sbusfb * fb,struct display * p,int index,int count)184 static void cg14_loadcmap (struct fb_info_sbusfb *fb, struct display *p,
185 int index, int count)
186 {
187 struct cg14_clut *clut = fb->s.cg14.clut;
188 unsigned long flags;
189
190 spin_lock_irqsave(&fb->lock, flags);
191 for (; count--; index++) {
192 u32 val;
193
194 val = ((fb->color_map CM(index,2) << 16) |
195 (fb->color_map CM(index,1) << 8) |
196 (fb->color_map CM(index,0)));
197 sbus_writel(val, &clut->c_clut[index]);
198 }
199 spin_unlock_irqrestore(&fb->lock, flags);
200 }
201
cg14_margins(struct fb_info_sbusfb * fb,struct display * p,int x_margin,int y_margin)202 static void cg14_margins (struct fb_info_sbusfb *fb, struct display *p,
203 int x_margin, int y_margin)
204 {
205 p->screen_base += (y_margin - fb->y_margin) *
206 p->line_length + (x_margin - fb->x_margin);
207 }
208
cg14_setcursormap(struct fb_info_sbusfb * fb,u8 * red,u8 * green,u8 * blue)209 static void cg14_setcursormap (struct fb_info_sbusfb *fb, u8 *red, u8 *green, u8 *blue)
210 {
211 struct cg14_cursor *cur = fb->s.cg14.cursor;
212 unsigned long flags;
213
214 spin_lock_irqsave(&fb->lock, flags);
215 sbus_writel(((red[0]) | (green[0] << 8) | (blue[0] << 16)), &cur->color0);
216 sbus_writel(((red[1]) | (green[1] << 8) | (blue[1] << 16)), &cur->color1);
217 spin_unlock_irqrestore(&fb->lock, flags);
218 }
219
220 /* Set cursor shape */
cg14_setcurshape(struct fb_info_sbusfb * fb)221 static void cg14_setcurshape (struct fb_info_sbusfb *fb)
222 {
223 struct cg14_cursor *cur = fb->s.cg14.cursor;
224 unsigned long flags;
225 int i;
226
227 spin_lock_irqsave(&fb->lock, flags);
228 for (i = 0; i < 32; i++){
229 sbus_writel(fb->cursor.bits[0][i], &cur->cpl0[i]);
230 sbus_writel(fb->cursor.bits[1][i], &cur->cpl1[i]);
231 }
232 spin_unlock_irqrestore(&fb->lock, flags);
233 }
234
235 /* Load cursor information */
cg14_setcursor(struct fb_info_sbusfb * fb)236 static void cg14_setcursor (struct fb_info_sbusfb *fb)
237 {
238 struct cg_cursor *c = &fb->cursor;
239 struct cg14_cursor *cur = fb->s.cg14.cursor;
240 unsigned long flags;
241
242 spin_lock_irqsave(&fb->lock, flags);
243 if (c->enable) {
244 u8 tmp = sbus_readb(&cur->ccr);
245
246 tmp |= CG14_CCR_ENABLE;
247 sbus_writeb(tmp, &cur->ccr);
248 } else {
249 u8 tmp = sbus_readb(&cur->ccr);
250
251 tmp &= ~CG14_CCR_ENABLE;
252 sbus_writeb(tmp, &cur->ccr);
253 }
254 sbus_writew(((c->cpos.fbx - c->chot.fbx) & 0xfff), &cur->cursx);
255 sbus_writew(((c->cpos.fby - c->chot.fby) & 0xfff), &cur->cursy);
256 spin_unlock_irqrestore(&fb->lock, flags);
257 }
258
cg14_switch_from_graph(struct fb_info_sbusfb * fb)259 static void cg14_switch_from_graph (struct fb_info_sbusfb *fb)
260 {
261 unsigned long flags;
262
263 spin_lock_irqsave(&fb->lock, flags);
264
265 /* Set the 8-bpp mode */
266 if (fb->open && fb->mmaped){
267 volatile char *mcr = &fb->s.cg14.regs->mcr;
268 char tmp;
269
270 fb->s.cg14.mode = 8;
271 tmp = sbus_readb(mcr);
272 tmp &= ~(CG14_MCR_PIXMODE_MASK);
273 sbus_writeb(tmp, mcr);
274 }
275 spin_unlock_irqrestore(&fb->lock, flags);
276 }
277
cg14_reset(struct fb_info_sbusfb * fb)278 static void cg14_reset (struct fb_info_sbusfb *fb)
279 {
280 volatile char *mcr = &fb->s.cg14.regs->mcr;
281 unsigned long flags;
282 char tmp;
283
284 spin_lock_irqsave(&fb->lock, flags);
285 tmp = sbus_readb(mcr);
286 tmp &= ~(CG14_MCR_PIXMODE_MASK);
287 sbus_writeb(tmp, mcr);
288 spin_unlock_irqrestore(&fb->lock, flags);
289 }
290
cg14_ioctl(struct fb_info_sbusfb * fb,unsigned int cmd,unsigned long arg)291 static int cg14_ioctl (struct fb_info_sbusfb *fb, unsigned int cmd, unsigned long arg)
292 {
293 volatile char *mcr = &fb->s.cg14.regs->mcr;
294 struct mdi_cfginfo *mdii;
295 unsigned long flags;
296 int mode, ret = 0;
297 char tmp;
298
299 switch (cmd) {
300 case MDI_RESET:
301 spin_lock_irqsave(&fb->lock, flags);
302 tmp = sbus_readb(mcr);
303 tmp &= ~CG14_MCR_PIXMODE_MASK;
304 sbus_writeb(tmp, mcr);
305 spin_unlock_irqrestore(&fb->lock, flags);
306 break;
307 case MDI_GET_CFGINFO:
308 mdii = (struct mdi_cfginfo *)arg;
309 if (put_user(FBTYPE_MDICOLOR, &mdii->mdi_type) ||
310 __put_user(fb->type.fb_height, &mdii->mdi_height) ||
311 __put_user(fb->type.fb_width, &mdii->mdi_width) ||
312 __put_user(fb->s.cg14.mode, &mdii->mdi_mode) ||
313 __put_user(72, &mdii->mdi_pixfreq) || /* FIXME */
314 __put_user(fb->s.cg14.ramsize, &mdii->mdi_size))
315 return -EFAULT;
316 break;
317 case MDI_SET_PIXELMODE:
318 if (get_user(mode, (int *)arg))
319 return -EFAULT;
320
321 spin_lock_irqsave(&fb->lock, flags);
322 tmp = sbus_readb(mcr);
323 switch (mode){
324 case MDI_32_PIX:
325 tmp = (tmp & ~CG14_MCR_PIXMODE_MASK) |
326 (CG14_MCR_PIXMODE_32 << CG14_MCR_PIXMODE_SHIFT);
327 break;
328 case MDI_16_PIX:
329 tmp = (tmp & ~CG14_MCR_PIXMODE_MASK) | 0x20;
330 break;
331 case MDI_8_PIX:
332 tmp = (tmp & ~CG14_MCR_PIXMODE_MASK);
333 break;
334 default:
335 ret = -ENOSYS;
336 break;
337 };
338 if (ret == 0) {
339 sbus_writeb(tmp, mcr);
340 fb->s.cg14.mode = mode;
341 }
342 spin_unlock_irqrestore(&fb->lock, flags);
343 break;
344 default:
345 ret = -EINVAL;
346 };
347
348 return ret;
349 }
350
get_phys(unsigned long addr)351 static unsigned long __init get_phys(unsigned long addr)
352 {
353 return __get_phys(addr);
354 }
355
get_iospace(unsigned long addr)356 static int __init get_iospace(unsigned long addr)
357 {
358 return __get_iospace(addr);
359 }
360
361 static char idstring[60] __initdata = { 0 };
362
cgfourteenfb_init(struct fb_info_sbusfb * fb)363 char __init *cgfourteenfb_init(struct fb_info_sbusfb *fb)
364 {
365 struct fb_fix_screeninfo *fix = &fb->fix;
366 struct display *disp = &fb->disp;
367 struct fbtype *type = &fb->type;
368 unsigned long rphys, phys;
369 u32 bases[6];
370 int is_8mb, i;
371
372 #ifndef FBCON_HAS_CFB8
373 return NULL;
374 #endif
375 prom_getproperty (fb->prom_node, "address", (char *) &bases[0], 8);
376 if (!bases[0]) {
377 printk("cg14 not mmaped\n");
378 return NULL;
379 }
380 if (get_iospace(bases[0]) != get_iospace(bases[1])) {
381 printk("Ugh. cg14 iospaces don't match\n");
382 return NULL;
383 }
384 fb->physbase = phys = get_phys(bases[1]);
385 rphys = get_phys(bases[0]);
386 fb->iospace = get_iospace(bases[0]);
387 fb->s.cg14.regs = (struct cg14_regs *)(unsigned long)bases[0];
388 fb->s.cg14.clut = (void *)((unsigned long)bases[0]+CG14_CLUT1);
389 fb->s.cg14.cursor = (void *)((unsigned long)bases[0]+CG14_CURSORREGS);
390 disp->screen_base = (char *)bases[1];
391
392 /* CG14_VCA_8MB_MASK is not correctly set on the 501-2482
393 * VSIMM, so we read the memory size from the PROM
394 */
395 prom_getproperty(fb->prom_node, "reg", (char *) &bases[0], 24);
396 is_8mb = bases[5] == 0x800000;
397
398 fb->mmap_map = kmalloc(sizeof(cg14_mmap_map), GFP_KERNEL);
399 if (!fb->mmap_map)
400 return NULL;
401
402 for (i = 0; ; i++) {
403 fb->mmap_map[i].voff = cg14_mmap_map[i].voff;
404 fb->mmap_map[i].poff = (cg14_mmap_map[i].poff & 0x80000000) ?
405 (cg14_mmap_map[i].poff & 0x7fffffff) + rphys - phys :
406 cg14_mmap_map[i].poff;
407 fb->mmap_map[i].size = cg14_mmap_map[i].size;
408 if (is_8mb && fb->mmap_map[i].size >= 0x100000 &&
409 fb->mmap_map[i].size <= 0x400000)
410 fb->mmap_map[i].size <<= 1;
411 if (!cg14_mmap_map[i].size)
412 break;
413 }
414
415 strcpy(fb->info.modename, "CGfourteen");
416 strcpy(fix->id, "CGfourteen");
417 fix->line_length = fb->var.xres_virtual;
418 fix->accel = FB_ACCEL_SUN_CG14;
419
420 disp->scrollmode = SCROLL_YREDRAW;
421 disp->screen_base += fix->line_length * fb->y_margin + fb->x_margin;
422 fb->dispsw = fbcon_cfb8;
423
424 type->fb_depth = 24;
425 fb->emulations[1] = FBTYPE_SUN3COLOR;
426
427 fb->margins = cg14_margins;
428 fb->loadcmap = cg14_loadcmap;
429 fb->setcursor = cg14_setcursor;
430 fb->setcursormap = cg14_setcursormap;
431 fb->setcurshape = cg14_setcurshape;
432 fb->reset = cg14_reset;
433 fb->switch_from_graph = cg14_switch_from_graph;
434 fb->ioctl = cg14_ioctl;
435
436 fb->s.cg14.mode = 8;
437 fb->s.cg14.ramsize = (is_8mb) ? 0x800000 : 0x400000;
438
439 cg14_reset(fb);
440
441 sprintf(idstring, "cgfourteen at %x.%08lx, %dMB, rev=%d, impl=%d", fb->iospace, phys,
442 is_8mb ? 8 : 4, fb->s.cg14.regs->rev >> 4, fb->s.cg14.regs->rev & 0xf);
443
444 return idstring;
445 }
446