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Fix lguest bzImage loading with CONFIG_RELOCATABLE=y
[deliverable/linux.git] / drivers / video / tgafb.c
1 /*
2 * linux/drivers/video/tgafb.c -- DEC 21030 TGA frame buffer device
3 *
4 * Copyright (C) 1995 Jay Estabrook
5 * Copyright (C) 1997 Geert Uytterhoeven
6 * Copyright (C) 1999,2000 Martin Lucina, Tom Zerucha
7 * Copyright (C) 2002 Richard Henderson
8 * Copyright (C) 2006 Maciej W. Rozycki
9 *
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file COPYING in the main directory of this archive for
12 * more details.
13 */
14
15 #include <linux/bitrev.h>
16 #include <linux/delay.h>
17 #include <linux/device.h>
18 #include <linux/errno.h>
19 #include <linux/fb.h>
20 #include <linux/init.h>
21 #include <linux/ioport.h>
22 #include <linux/kernel.h>
23 #include <linux/mm.h>
24 #include <linux/module.h>
25 #include <linux/pci.h>
26 #include <linux/selection.h>
27 #include <linux/slab.h>
28 #include <linux/string.h>
29 #include <linux/tc.h>
30
31 #include <asm/io.h>
32
33 #include <video/tgafb.h>
34
35 #ifdef CONFIG_PCI
36 #define TGA_BUS_PCI(dev) (dev->bus == &pci_bus_type)
37 #else
38 #define TGA_BUS_PCI(dev) 0
39 #endif
40
41 #ifdef CONFIG_TC
42 #define TGA_BUS_TC(dev) (dev->bus == &tc_bus_type)
43 #else
44 #define TGA_BUS_TC(dev) 0
45 #endif
46
47 /*
48 * Local functions.
49 */
50
51 static int tgafb_check_var(struct fb_var_screeninfo *, struct fb_info *);
52 static int tgafb_set_par(struct fb_info *);
53 static void tgafb_set_pll(struct tga_par *, int);
54 static int tgafb_setcolreg(unsigned, unsigned, unsigned, unsigned,
55 unsigned, struct fb_info *);
56 static int tgafb_blank(int, struct fb_info *);
57 static void tgafb_init_fix(struct fb_info *);
58
59 static void tgafb_imageblit(struct fb_info *, const struct fb_image *);
60 static void tgafb_fillrect(struct fb_info *, const struct fb_fillrect *);
61 static void tgafb_copyarea(struct fb_info *, const struct fb_copyarea *);
62 static int tgafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info);
63
64 static int __devinit tgafb_register(struct device *dev);
65 static void __devexit tgafb_unregister(struct device *dev);
66
67 static const char *mode_option;
68 static const char *mode_option_pci = "640x480@60";
69 static const char *mode_option_tc = "1280x1024@72";
70
71
72 static struct pci_driver tgafb_pci_driver;
73 static struct tc_driver tgafb_tc_driver;
74
75 /*
76 * Frame buffer operations
77 */
78
79 static struct fb_ops tgafb_ops = {
80 .owner = THIS_MODULE,
81 .fb_check_var = tgafb_check_var,
82 .fb_set_par = tgafb_set_par,
83 .fb_setcolreg = tgafb_setcolreg,
84 .fb_blank = tgafb_blank,
85 .fb_pan_display = tgafb_pan_display,
86 .fb_fillrect = tgafb_fillrect,
87 .fb_copyarea = tgafb_copyarea,
88 .fb_imageblit = tgafb_imageblit,
89 };
90
91
92 #ifdef CONFIG_PCI
93 /*
94 * PCI registration operations
95 */
96 static int __devinit tgafb_pci_register(struct pci_dev *,
97 const struct pci_device_id *);
98 static void __devexit tgafb_pci_unregister(struct pci_dev *);
99
100 static struct pci_device_id const tgafb_pci_table[] = {
101 { PCI_DEVICE(PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TGA) },
102 { }
103 };
104 MODULE_DEVICE_TABLE(pci, tgafb_pci_table);
105
106 static struct pci_driver tgafb_pci_driver = {
107 .name = "tgafb",
108 .id_table = tgafb_pci_table,
109 .probe = tgafb_pci_register,
110 .remove = __devexit_p(tgafb_pci_unregister),
111 };
112
113 static int __devinit
114 tgafb_pci_register(struct pci_dev *pdev, const struct pci_device_id *ent)
115 {
116 return tgafb_register(&pdev->dev);
117 }
118
119 static void __devexit
120 tgafb_pci_unregister(struct pci_dev *pdev)
121 {
122 tgafb_unregister(&pdev->dev);
123 }
124 #endif /* CONFIG_PCI */
125
126 #ifdef CONFIG_TC
127 /*
128 * TC registration operations
129 */
130 static int __devinit tgafb_tc_register(struct device *);
131 static int __devexit tgafb_tc_unregister(struct device *);
132
133 static struct tc_device_id const tgafb_tc_table[] = {
134 { "DEC ", "PMAGD-AA" },
135 { "DEC ", "PMAGD " },
136 { }
137 };
138 MODULE_DEVICE_TABLE(tc, tgafb_tc_table);
139
140 static struct tc_driver tgafb_tc_driver = {
141 .id_table = tgafb_tc_table,
142 .driver = {
143 .name = "tgafb",
144 .bus = &tc_bus_type,
145 .probe = tgafb_tc_register,
146 .remove = __devexit_p(tgafb_tc_unregister),
147 },
148 };
149
150 static int __devinit
151 tgafb_tc_register(struct device *dev)
152 {
153 int status = tgafb_register(dev);
154 if (!status)
155 get_device(dev);
156 return status;
157 }
158
159 static int __devexit
160 tgafb_tc_unregister(struct device *dev)
161 {
162 put_device(dev);
163 tgafb_unregister(dev);
164 return 0;
165 }
166 #endif /* CONFIG_TC */
167
168
169 /**
170 * tgafb_check_var - Optional function. Validates a var passed in.
171 * @var: frame buffer variable screen structure
172 * @info: frame buffer structure that represents a single frame buffer
173 */
174 static int
175 tgafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
176 {
177 struct tga_par *par = (struct tga_par *)info->par;
178
179 if (par->tga_type == TGA_TYPE_8PLANE) {
180 if (var->bits_per_pixel != 8)
181 return -EINVAL;
182 } else {
183 if (var->bits_per_pixel != 32)
184 return -EINVAL;
185 }
186 var->red.length = var->green.length = var->blue.length = 8;
187 if (var->bits_per_pixel == 32) {
188 var->red.offset = 16;
189 var->green.offset = 8;
190 var->blue.offset = 0;
191 }
192
193 if (var->xres_virtual != var->xres || var->yres_virtual != var->yres)
194 return -EINVAL;
195 if (var->nonstd)
196 return -EINVAL;
197 if (1000000000 / var->pixclock > TGA_PLL_MAX_FREQ)
198 return -EINVAL;
199 if ((var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
200 return -EINVAL;
201
202 /* Some of the acceleration routines assume the line width is
203 a multiple of 64 bytes. */
204 if (var->xres * (par->tga_type == TGA_TYPE_8PLANE ? 1 : 4) % 64)
205 return -EINVAL;
206
207 return 0;
208 }
209
210 /**
211 * tgafb_set_par - Optional function. Alters the hardware state.
212 * @info: frame buffer structure that represents a single frame buffer
213 */
214 static int
215 tgafb_set_par(struct fb_info *info)
216 {
217 static unsigned int const deep_presets[4] = {
218 0x00004000,
219 0x0000440d,
220 0xffffffff,
221 0x0000441d
222 };
223 static unsigned int const rasterop_presets[4] = {
224 0x00000003,
225 0x00000303,
226 0xffffffff,
227 0x00000303
228 };
229 static unsigned int const mode_presets[4] = {
230 0x00000000,
231 0x00000300,
232 0xffffffff,
233 0x00000300
234 };
235 static unsigned int const base_addr_presets[4] = {
236 0x00000000,
237 0x00000001,
238 0xffffffff,
239 0x00000001
240 };
241
242 struct tga_par *par = (struct tga_par *) info->par;
243 int tga_bus_pci = TGA_BUS_PCI(par->dev);
244 int tga_bus_tc = TGA_BUS_TC(par->dev);
245 u32 htimings, vtimings, pll_freq;
246 u8 tga_type;
247 int i;
248
249 /* Encode video timings. */
250 htimings = (((info->var.xres/4) & TGA_HORIZ_ACT_LSB)
251 | (((info->var.xres/4) & 0x600 << 19) & TGA_HORIZ_ACT_MSB));
252 vtimings = (info->var.yres & TGA_VERT_ACTIVE);
253 htimings |= ((info->var.right_margin/4) << 9) & TGA_HORIZ_FP;
254 vtimings |= (info->var.lower_margin << 11) & TGA_VERT_FP;
255 htimings |= ((info->var.hsync_len/4) << 14) & TGA_HORIZ_SYNC;
256 vtimings |= (info->var.vsync_len << 16) & TGA_VERT_SYNC;
257 htimings |= ((info->var.left_margin/4) << 21) & TGA_HORIZ_BP;
258 vtimings |= (info->var.upper_margin << 22) & TGA_VERT_BP;
259
260 if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
261 htimings |= TGA_HORIZ_POLARITY;
262 if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
263 vtimings |= TGA_VERT_POLARITY;
264
265 par->htimings = htimings;
266 par->vtimings = vtimings;
267
268 par->sync_on_green = !!(info->var.sync & FB_SYNC_ON_GREEN);
269
270 /* Store other useful values in par. */
271 par->xres = info->var.xres;
272 par->yres = info->var.yres;
273 par->pll_freq = pll_freq = 1000000000 / info->var.pixclock;
274 par->bits_per_pixel = info->var.bits_per_pixel;
275
276 tga_type = par->tga_type;
277
278 /* First, disable video. */
279 TGA_WRITE_REG(par, TGA_VALID_VIDEO | TGA_VALID_BLANK, TGA_VALID_REG);
280
281 /* Write the DEEP register. */
282 while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
283 continue;
284 mb();
285 TGA_WRITE_REG(par, deep_presets[tga_type] |
286 (par->sync_on_green ? 0x0 : 0x00010000),
287 TGA_DEEP_REG);
288 while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
289 continue;
290 mb();
291
292 /* Write some more registers. */
293 TGA_WRITE_REG(par, rasterop_presets[tga_type], TGA_RASTEROP_REG);
294 TGA_WRITE_REG(par, mode_presets[tga_type], TGA_MODE_REG);
295 TGA_WRITE_REG(par, base_addr_presets[tga_type], TGA_BASE_ADDR_REG);
296
297 /* Calculate & write the PLL. */
298 tgafb_set_pll(par, pll_freq);
299
300 /* Write some more registers. */
301 TGA_WRITE_REG(par, 0xffffffff, TGA_PLANEMASK_REG);
302 TGA_WRITE_REG(par, 0xffffffff, TGA_PIXELMASK_REG);
303
304 /* Init video timing regs. */
305 TGA_WRITE_REG(par, htimings, TGA_HORIZ_REG);
306 TGA_WRITE_REG(par, vtimings, TGA_VERT_REG);
307
308 /* Initalise RAMDAC. */
309 if (tga_type == TGA_TYPE_8PLANE && tga_bus_pci) {
310
311 /* Init BT485 RAMDAC registers. */
312 BT485_WRITE(par, 0xa2 | (par->sync_on_green ? 0x8 : 0x0),
313 BT485_CMD_0);
314 BT485_WRITE(par, 0x01, BT485_ADDR_PAL_WRITE);
315 BT485_WRITE(par, 0x14, BT485_CMD_3); /* cursor 64x64 */
316 BT485_WRITE(par, 0x40, BT485_CMD_1);
317 BT485_WRITE(par, 0x20, BT485_CMD_2); /* cursor off, for now */
318 BT485_WRITE(par, 0xff, BT485_PIXEL_MASK);
319
320 /* Fill palette registers. */
321 BT485_WRITE(par, 0x00, BT485_ADDR_PAL_WRITE);
322 TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
323
324 for (i = 0; i < 256 * 3; i += 4) {
325 TGA_WRITE_REG(par, 0x55 | (BT485_DATA_PAL << 8),
326 TGA_RAMDAC_REG);
327 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
328 TGA_RAMDAC_REG);
329 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
330 TGA_RAMDAC_REG);
331 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
332 TGA_RAMDAC_REG);
333 }
334
335 } else if (tga_type == TGA_TYPE_8PLANE && tga_bus_tc) {
336
337 /* Init BT459 RAMDAC registers. */
338 BT459_WRITE(par, BT459_REG_ACC, BT459_CMD_REG_0, 0x40);
339 BT459_WRITE(par, BT459_REG_ACC, BT459_CMD_REG_1, 0x00);
340 BT459_WRITE(par, BT459_REG_ACC, BT459_CMD_REG_2,
341 (par->sync_on_green ? 0xc0 : 0x40));
342
343 BT459_WRITE(par, BT459_REG_ACC, BT459_CUR_CMD_REG, 0x00);
344
345 /* Fill the palette. */
346 BT459_LOAD_ADDR(par, 0x0000);
347 TGA_WRITE_REG(par, BT459_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
348
349 for (i = 0; i < 256 * 3; i += 4) {
350 TGA_WRITE_REG(par, 0x55, TGA_RAMDAC_REG);
351 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
352 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
353 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
354 }
355
356 } else { /* 24-plane or 24plusZ */
357
358 /* Init BT463 RAMDAC registers. */
359 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_0, 0x40);
360 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_1, 0x08);
361 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_2,
362 (par->sync_on_green ? 0xc0 : 0x40));
363
364 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_0, 0xff);
365 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_1, 0xff);
366 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_2, 0xff);
367 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_3, 0x0f);
368
369 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_0, 0x00);
370 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_1, 0x00);
371 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_2, 0x00);
372 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_3, 0x00);
373
374 /* Fill the palette. */
375 BT463_LOAD_ADDR(par, 0x0000);
376 TGA_WRITE_REG(par, BT463_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
377
378 #ifdef CONFIG_HW_CONSOLE
379 for (i = 0; i < 16; i++) {
380 int j = color_table[i];
381
382 TGA_WRITE_REG(par, default_red[j], TGA_RAMDAC_REG);
383 TGA_WRITE_REG(par, default_grn[j], TGA_RAMDAC_REG);
384 TGA_WRITE_REG(par, default_blu[j], TGA_RAMDAC_REG);
385 }
386 for (i = 0; i < 512 * 3; i += 4) {
387 #else
388 for (i = 0; i < 528 * 3; i += 4) {
389 #endif
390 TGA_WRITE_REG(par, 0x55, TGA_RAMDAC_REG);
391 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
392 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
393 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
394 }
395
396 /* Fill window type table after start of vertical retrace. */
397 while (!(TGA_READ_REG(par, TGA_INTR_STAT_REG) & 0x01))
398 continue;
399 TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
400 mb();
401 while (!(TGA_READ_REG(par, TGA_INTR_STAT_REG) & 0x01))
402 continue;
403 TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
404
405 BT463_LOAD_ADDR(par, BT463_WINDOW_TYPE_BASE);
406 TGA_WRITE_REG(par, BT463_REG_ACC << 2, TGA_RAMDAC_SETUP_REG);
407
408 for (i = 0; i < 16; i++) {
409 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
410 TGA_WRITE_REG(par, 0x01, TGA_RAMDAC_REG);
411 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
412 }
413
414 }
415
416 /* Finally, enable video scan (and pray for the monitor... :-) */
417 TGA_WRITE_REG(par, TGA_VALID_VIDEO, TGA_VALID_REG);
418
419 return 0;
420 }
421
422 #define DIFFCHECK(X) \
423 do { \
424 if (m <= 0x3f) { \
425 int delta = f - (TGA_PLL_BASE_FREQ * (X)) / (r << shift); \
426 if (delta < 0) \
427 delta = -delta; \
428 if (delta < min_diff) \
429 min_diff = delta, vm = m, va = a, vr = r; \
430 } \
431 } while (0)
432
433 static void
434 tgafb_set_pll(struct tga_par *par, int f)
435 {
436 int n, shift, base, min_diff, target;
437 int r,a,m,vm = 34, va = 1, vr = 30;
438
439 for (r = 0 ; r < 12 ; r++)
440 TGA_WRITE_REG(par, !r, TGA_CLOCK_REG);
441
442 if (f > TGA_PLL_MAX_FREQ)
443 f = TGA_PLL_MAX_FREQ;
444
445 if (f >= TGA_PLL_MAX_FREQ / 2)
446 shift = 0;
447 else if (f >= TGA_PLL_MAX_FREQ / 4)
448 shift = 1;
449 else
450 shift = 2;
451
452 TGA_WRITE_REG(par, shift & 1, TGA_CLOCK_REG);
453 TGA_WRITE_REG(par, shift >> 1, TGA_CLOCK_REG);
454
455 for (r = 0 ; r < 10 ; r++)
456 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
457
458 if (f <= 120000) {
459 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
460 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
461 }
462 else if (f <= 200000) {
463 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
464 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
465 }
466 else {
467 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
468 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
469 }
470
471 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
472 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
473 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
474 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
475 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
476 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
477
478 target = (f << shift) / TGA_PLL_BASE_FREQ;
479 min_diff = TGA_PLL_MAX_FREQ;
480
481 r = 7 / target;
482 if (!r) r = 1;
483
484 base = target * r;
485 while (base < 449) {
486 for (n = base < 7 ? 7 : base; n < base + target && n < 449; n++) {
487 m = ((n + 3) / 7) - 1;
488 a = 0;
489 DIFFCHECK((m + 1) * 7);
490 m++;
491 DIFFCHECK((m + 1) * 7);
492 m = (n / 6) - 1;
493 if ((a = n % 6))
494 DIFFCHECK(n);
495 }
496 r++;
497 base += target;
498 }
499
500 vr--;
501
502 for (r = 0; r < 8; r++)
503 TGA_WRITE_REG(par, (vm >> r) & 1, TGA_CLOCK_REG);
504 for (r = 0; r < 8 ; r++)
505 TGA_WRITE_REG(par, (va >> r) & 1, TGA_CLOCK_REG);
506 for (r = 0; r < 7 ; r++)
507 TGA_WRITE_REG(par, (vr >> r) & 1, TGA_CLOCK_REG);
508 TGA_WRITE_REG(par, ((vr >> 7) & 1)|2, TGA_CLOCK_REG);
509 }
510
511
512 /**
513 * tgafb_setcolreg - Optional function. Sets a color register.
514 * @regno: boolean, 0 copy local, 1 get_user() function
515 * @red: frame buffer colormap structure
516 * @green: The green value which can be up to 16 bits wide
517 * @blue: The blue value which can be up to 16 bits wide.
518 * @transp: If supported the alpha value which can be up to 16 bits wide.
519 * @info: frame buffer info structure
520 */
521 static int
522 tgafb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue,
523 unsigned transp, struct fb_info *info)
524 {
525 struct tga_par *par = (struct tga_par *) info->par;
526 int tga_bus_pci = TGA_BUS_PCI(par->dev);
527 int tga_bus_tc = TGA_BUS_TC(par->dev);
528
529 if (regno > 255)
530 return 1;
531 red >>= 8;
532 green >>= 8;
533 blue >>= 8;
534
535 if (par->tga_type == TGA_TYPE_8PLANE && tga_bus_pci) {
536 BT485_WRITE(par, regno, BT485_ADDR_PAL_WRITE);
537 TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
538 TGA_WRITE_REG(par, red|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
539 TGA_WRITE_REG(par, green|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
540 TGA_WRITE_REG(par, blue|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
541 } else if (par->tga_type == TGA_TYPE_8PLANE && tga_bus_tc) {
542 BT459_LOAD_ADDR(par, regno);
543 TGA_WRITE_REG(par, BT459_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
544 TGA_WRITE_REG(par, red, TGA_RAMDAC_REG);
545 TGA_WRITE_REG(par, green, TGA_RAMDAC_REG);
546 TGA_WRITE_REG(par, blue, TGA_RAMDAC_REG);
547 } else {
548 if (regno < 16) {
549 u32 value = (regno << 16) | (regno << 8) | regno;
550 ((u32 *)info->pseudo_palette)[regno] = value;
551 }
552 BT463_LOAD_ADDR(par, regno);
553 TGA_WRITE_REG(par, BT463_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
554 TGA_WRITE_REG(par, red, TGA_RAMDAC_REG);
555 TGA_WRITE_REG(par, green, TGA_RAMDAC_REG);
556 TGA_WRITE_REG(par, blue, TGA_RAMDAC_REG);
557 }
558
559 return 0;
560 }
561
562
563 /**
564 * tgafb_blank - Optional function. Blanks the display.
565 * @blank_mode: the blank mode we want.
566 * @info: frame buffer structure that represents a single frame buffer
567 */
568 static int
569 tgafb_blank(int blank, struct fb_info *info)
570 {
571 struct tga_par *par = (struct tga_par *) info->par;
572 u32 vhcr, vvcr, vvvr;
573 unsigned long flags;
574
575 local_irq_save(flags);
576
577 vhcr = TGA_READ_REG(par, TGA_HORIZ_REG);
578 vvcr = TGA_READ_REG(par, TGA_VERT_REG);
579 vvvr = TGA_READ_REG(par, TGA_VALID_REG);
580 vvvr &= ~(TGA_VALID_VIDEO | TGA_VALID_BLANK);
581
582 switch (blank) {
583 case FB_BLANK_UNBLANK: /* Unblanking */
584 if (par->vesa_blanked) {
585 TGA_WRITE_REG(par, vhcr & 0xbfffffff, TGA_HORIZ_REG);
586 TGA_WRITE_REG(par, vvcr & 0xbfffffff, TGA_VERT_REG);
587 par->vesa_blanked = 0;
588 }
589 TGA_WRITE_REG(par, vvvr | TGA_VALID_VIDEO, TGA_VALID_REG);
590 break;
591
592 case FB_BLANK_NORMAL: /* Normal blanking */
593 TGA_WRITE_REG(par, vvvr | TGA_VALID_VIDEO | TGA_VALID_BLANK,
594 TGA_VALID_REG);
595 break;
596
597 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
598 TGA_WRITE_REG(par, vvcr | 0x40000000, TGA_VERT_REG);
599 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
600 par->vesa_blanked = 1;
601 break;
602
603 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
604 TGA_WRITE_REG(par, vhcr | 0x40000000, TGA_HORIZ_REG);
605 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
606 par->vesa_blanked = 1;
607 break;
608
609 case FB_BLANK_POWERDOWN: /* Poweroff */
610 TGA_WRITE_REG(par, vhcr | 0x40000000, TGA_HORIZ_REG);
611 TGA_WRITE_REG(par, vvcr | 0x40000000, TGA_VERT_REG);
612 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
613 par->vesa_blanked = 1;
614 break;
615 }
616
617 local_irq_restore(flags);
618 return 0;
619 }
620
621
622 /*
623 * Acceleration.
624 */
625
626 static void
627 tgafb_mono_imageblit(struct fb_info *info, const struct fb_image *image)
628 {
629 struct tga_par *par = (struct tga_par *) info->par;
630 u32 fgcolor, bgcolor, dx, dy, width, height, vxres, vyres, pixelmask;
631 unsigned long rincr, line_length, shift, pos, is8bpp;
632 unsigned long i, j;
633 const unsigned char *data;
634 void __iomem *regs_base;
635 void __iomem *fb_base;
636
637 is8bpp = info->var.bits_per_pixel == 8;
638
639 /* For copies that aren't pixel expansion, there's little we
640 can do better than the generic code. */
641 /* ??? There is a DMA write mode; I wonder if that could be
642 made to pull the data from the image buffer... */
643 if (image->depth > 1) {
644 cfb_imageblit(info, image);
645 return;
646 }
647
648 dx = image->dx;
649 dy = image->dy;
650 width = image->width;
651 height = image->height;
652 vxres = info->var.xres_virtual;
653 vyres = info->var.yres_virtual;
654 line_length = info->fix.line_length;
655 rincr = (width + 7) / 8;
656
657 /* Crop the image to the screen. */
658 if (dx > vxres || dy > vyres)
659 return;
660 if (dx + width > vxres)
661 width = vxres - dx;
662 if (dy + height > vyres)
663 height = vyres - dy;
664
665 regs_base = par->tga_regs_base;
666 fb_base = par->tga_fb_base;
667
668 /* Expand the color values to fill 32-bits. */
669 /* ??? Would be nice to notice colour changes elsewhere, so
670 that we can do this only when necessary. */
671 fgcolor = image->fg_color;
672 bgcolor = image->bg_color;
673 if (is8bpp) {
674 fgcolor |= fgcolor << 8;
675 fgcolor |= fgcolor << 16;
676 bgcolor |= bgcolor << 8;
677 bgcolor |= bgcolor << 16;
678 } else {
679 if (fgcolor < 16)
680 fgcolor = ((u32 *)info->pseudo_palette)[fgcolor];
681 if (bgcolor < 16)
682 bgcolor = ((u32 *)info->pseudo_palette)[bgcolor];
683 }
684 __raw_writel(fgcolor, regs_base + TGA_FOREGROUND_REG);
685 __raw_writel(bgcolor, regs_base + TGA_BACKGROUND_REG);
686
687 /* Acquire proper alignment; set up the PIXELMASK register
688 so that we only write the proper character cell. */
689 pos = dy * line_length;
690 if (is8bpp) {
691 pos += dx;
692 shift = pos & 3;
693 pos &= -4;
694 } else {
695 pos += dx * 4;
696 shift = (pos & 7) >> 2;
697 pos &= -8;
698 }
699
700 data = (const unsigned char *) image->data;
701
702 /* Enable opaque stipple mode. */
703 __raw_writel((is8bpp
704 ? TGA_MODE_SBM_8BPP | TGA_MODE_OPAQUE_STIPPLE
705 : TGA_MODE_SBM_24BPP | TGA_MODE_OPAQUE_STIPPLE),
706 regs_base + TGA_MODE_REG);
707
708 if (width + shift <= 32) {
709 unsigned long bwidth;
710
711 /* Handle common case of imaging a single character, in
712 a font less than 32 pixels wide. */
713
714 pixelmask = (1 << width) - 1;
715 pixelmask <<= shift;
716 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
717 wmb();
718
719 bwidth = (width + 7) / 8;
720
721 for (i = 0; i < height; ++i) {
722 u32 mask = 0;
723
724 /* The image data is bit big endian; we need
725 little endian. */
726 for (j = 0; j < bwidth; ++j)
727 mask |= bitrev8(data[j]) << (j * 8);
728
729 __raw_writel(mask << shift, fb_base + pos);
730
731 pos += line_length;
732 data += rincr;
733 }
734 wmb();
735 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
736 } else if (shift == 0) {
737 unsigned long pos0 = pos;
738 const unsigned char *data0 = data;
739 unsigned long bincr = (is8bpp ? 8 : 8*4);
740 unsigned long bwidth;
741
742 /* Handle another common case in which accel_putcs
743 generates a large bitmap, which happens to be aligned.
744 Allow the tail to be misaligned. This case is
745 interesting because we've not got to hold partial
746 bytes across the words being written. */
747
748 wmb();
749
750 bwidth = (width / 8) & -4;
751 for (i = 0; i < height; ++i) {
752 for (j = 0; j < bwidth; j += 4) {
753 u32 mask = 0;
754 mask |= bitrev8(data[j+0]) << (0 * 8);
755 mask |= bitrev8(data[j+1]) << (1 * 8);
756 mask |= bitrev8(data[j+2]) << (2 * 8);
757 mask |= bitrev8(data[j+3]) << (3 * 8);
758 __raw_writel(mask, fb_base + pos + j*bincr);
759 }
760 pos += line_length;
761 data += rincr;
762 }
763 wmb();
764
765 pixelmask = (1ul << (width & 31)) - 1;
766 if (pixelmask) {
767 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
768 wmb();
769
770 pos = pos0 + bwidth*bincr;
771 data = data0 + bwidth;
772 bwidth = ((width & 31) + 7) / 8;
773
774 for (i = 0; i < height; ++i) {
775 u32 mask = 0;
776 for (j = 0; j < bwidth; ++j)
777 mask |= bitrev8(data[j]) << (j * 8);
778 __raw_writel(mask, fb_base + pos);
779 pos += line_length;
780 data += rincr;
781 }
782 wmb();
783 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
784 }
785 } else {
786 unsigned long pos0 = pos;
787 const unsigned char *data0 = data;
788 unsigned long bincr = (is8bpp ? 8 : 8*4);
789 unsigned long bwidth;
790
791 /* Finally, handle the generic case of misaligned start.
792 Here we split the write into 16-bit spans. This allows
793 us to use only one pixel mask, instead of four as would
794 be required by writing 24-bit spans. */
795
796 pixelmask = 0xffff << shift;
797 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
798 wmb();
799
800 bwidth = (width / 8) & -2;
801 for (i = 0; i < height; ++i) {
802 for (j = 0; j < bwidth; j += 2) {
803 u32 mask = 0;
804 mask |= bitrev8(data[j+0]) << (0 * 8);
805 mask |= bitrev8(data[j+1]) << (1 * 8);
806 mask <<= shift;
807 __raw_writel(mask, fb_base + pos + j*bincr);
808 }
809 pos += line_length;
810 data += rincr;
811 }
812 wmb();
813
814 pixelmask = ((1ul << (width & 15)) - 1) << shift;
815 if (pixelmask) {
816 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
817 wmb();
818
819 pos = pos0 + bwidth*bincr;
820 data = data0 + bwidth;
821 bwidth = (width & 15) > 8;
822
823 for (i = 0; i < height; ++i) {
824 u32 mask = bitrev8(data[0]);
825 if (bwidth)
826 mask |= bitrev8(data[1]) << 8;
827 mask <<= shift;
828 __raw_writel(mask, fb_base + pos);
829 pos += line_length;
830 data += rincr;
831 }
832 wmb();
833 }
834 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
835 }
836
837 /* Disable opaque stipple mode. */
838 __raw_writel((is8bpp
839 ? TGA_MODE_SBM_8BPP | TGA_MODE_SIMPLE
840 : TGA_MODE_SBM_24BPP | TGA_MODE_SIMPLE),
841 regs_base + TGA_MODE_REG);
842 }
843
844 static void
845 tgafb_clut_imageblit(struct fb_info *info, const struct fb_image *image)
846 {
847 struct tga_par *par = (struct tga_par *) info->par;
848 u32 color, dx, dy, width, height, vxres, vyres;
849 u32 *palette = ((u32 *)info->pseudo_palette);
850 unsigned long pos, line_length, i, j;
851 const unsigned char *data;
852 void __iomem *regs_base, *fb_base;
853
854 dx = image->dx;
855 dy = image->dy;
856 width = image->width;
857 height = image->height;
858 vxres = info->var.xres_virtual;
859 vyres = info->var.yres_virtual;
860 line_length = info->fix.line_length;
861
862 /* Crop the image to the screen. */
863 if (dx > vxres || dy > vyres)
864 return;
865 if (dx + width > vxres)
866 width = vxres - dx;
867 if (dy + height > vyres)
868 height = vyres - dy;
869
870 regs_base = par->tga_regs_base;
871 fb_base = par->tga_fb_base;
872
873 pos = dy * line_length + (dx * 4);
874 data = image->data;
875
876 /* Now copy the image, color_expanding via the palette. */
877 for (i = 0; i < height; i++) {
878 for (j = 0; j < width; j++) {
879 color = palette[*data++];
880 __raw_writel(color, fb_base + pos + j*4);
881 }
882 pos += line_length;
883 }
884 }
885
886 /**
887 * tgafb_imageblit - REQUIRED function. Can use generic routines if
888 * non acclerated hardware and packed pixel based.
889 * Copies a image from system memory to the screen.
890 *
891 * @info: frame buffer structure that represents a single frame buffer
892 * @image: structure defining the image.
893 */
894 static void
895 tgafb_imageblit(struct fb_info *info, const struct fb_image *image)
896 {
897 unsigned int is8bpp = info->var.bits_per_pixel == 8;
898
899 /* If a mono image, regardless of FB depth, go do it. */
900 if (image->depth == 1) {
901 tgafb_mono_imageblit(info, image);
902 return;
903 }
904
905 /* For copies that aren't pixel expansion, there's little we
906 can do better than the generic code. */
907 /* ??? There is a DMA write mode; I wonder if that could be
908 made to pull the data from the image buffer... */
909 if (image->depth == info->var.bits_per_pixel) {
910 cfb_imageblit(info, image);
911 return;
912 }
913
914 /* If 24-plane FB and the image is 8-plane with CLUT, we can do it. */
915 if (!is8bpp && image->depth == 8) {
916 tgafb_clut_imageblit(info, image);
917 return;
918 }
919
920 /* Silently return... */
921 }
922
923 /**
924 * tgafb_fillrect - REQUIRED function. Can use generic routines if
925 * non acclerated hardware and packed pixel based.
926 * Draws a rectangle on the screen.
927 *
928 * @info: frame buffer structure that represents a single frame buffer
929 * @rect: structure defining the rectagle and operation.
930 */
931 static void
932 tgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
933 {
934 struct tga_par *par = (struct tga_par *) info->par;
935 int is8bpp = info->var.bits_per_pixel == 8;
936 u32 dx, dy, width, height, vxres, vyres, color;
937 unsigned long pos, align, line_length, i, j;
938 void __iomem *regs_base;
939 void __iomem *fb_base;
940
941 dx = rect->dx;
942 dy = rect->dy;
943 width = rect->width;
944 height = rect->height;
945 vxres = info->var.xres_virtual;
946 vyres = info->var.yres_virtual;
947 line_length = info->fix.line_length;
948 regs_base = par->tga_regs_base;
949 fb_base = par->tga_fb_base;
950
951 /* Crop the rectangle to the screen. */
952 if (dx > vxres || dy > vyres || !width || !height)
953 return;
954 if (dx + width > vxres)
955 width = vxres - dx;
956 if (dy + height > vyres)
957 height = vyres - dy;
958
959 pos = dy * line_length + dx * (is8bpp ? 1 : 4);
960
961 /* ??? We could implement ROP_XOR with opaque fill mode
962 and a RasterOp setting of GXxor, but as far as I can
963 tell, this mode is not actually used in the kernel.
964 Thus I am ignoring it for now. */
965 if (rect->rop != ROP_COPY) {
966 cfb_fillrect(info, rect);
967 return;
968 }
969
970 /* Expand the color value to fill 8 pixels. */
971 color = rect->color;
972 if (is8bpp) {
973 color |= color << 8;
974 color |= color << 16;
975 __raw_writel(color, regs_base + TGA_BLOCK_COLOR0_REG);
976 __raw_writel(color, regs_base + TGA_BLOCK_COLOR1_REG);
977 } else {
978 if (color < 16)
979 color = ((u32 *)info->pseudo_palette)[color];
980 __raw_writel(color, regs_base + TGA_BLOCK_COLOR0_REG);
981 __raw_writel(color, regs_base + TGA_BLOCK_COLOR1_REG);
982 __raw_writel(color, regs_base + TGA_BLOCK_COLOR2_REG);
983 __raw_writel(color, regs_base + TGA_BLOCK_COLOR3_REG);
984 __raw_writel(color, regs_base + TGA_BLOCK_COLOR4_REG);
985 __raw_writel(color, regs_base + TGA_BLOCK_COLOR5_REG);
986 __raw_writel(color, regs_base + TGA_BLOCK_COLOR6_REG);
987 __raw_writel(color, regs_base + TGA_BLOCK_COLOR7_REG);
988 }
989
990 /* The DATA register holds the fill mask for block fill mode.
991 Since we're not stippling, this is all ones. */
992 __raw_writel(0xffffffff, regs_base + TGA_DATA_REG);
993
994 /* Enable block fill mode. */
995 __raw_writel((is8bpp
996 ? TGA_MODE_SBM_8BPP | TGA_MODE_BLOCK_FILL
997 : TGA_MODE_SBM_24BPP | TGA_MODE_BLOCK_FILL),
998 regs_base + TGA_MODE_REG);
999 wmb();
1000
1001 /* We can fill 2k pixels per operation. Notice blocks that fit
1002 the width of the screen so that we can take advantage of this
1003 and fill more than one line per write. */
1004 if (width == line_length)
1005 width *= height, height = 1;
1006
1007 /* The write into the frame buffer must be aligned to 4 bytes,
1008 but we are allowed to encode the offset within the word in
1009 the data word written. */
1010 align = (pos & 3) << 16;
1011 pos &= -4;
1012
1013 if (width <= 2048) {
1014 u32 data;
1015
1016 data = (width - 1) | align;
1017
1018 for (i = 0; i < height; ++i) {
1019 __raw_writel(data, fb_base + pos);
1020 pos += line_length;
1021 }
1022 } else {
1023 unsigned long Bpp = (is8bpp ? 1 : 4);
1024 unsigned long nwidth = width & -2048;
1025 u32 fdata, ldata;
1026
1027 fdata = (2048 - 1) | align;
1028 ldata = ((width & 2047) - 1) | align;
1029
1030 for (i = 0; i < height; ++i) {
1031 for (j = 0; j < nwidth; j += 2048)
1032 __raw_writel(fdata, fb_base + pos + j*Bpp);
1033 if (j < width)
1034 __raw_writel(ldata, fb_base + pos + j*Bpp);
1035 pos += line_length;
1036 }
1037 }
1038 wmb();
1039
1040 /* Disable block fill mode. */
1041 __raw_writel((is8bpp
1042 ? TGA_MODE_SBM_8BPP | TGA_MODE_SIMPLE
1043 : TGA_MODE_SBM_24BPP | TGA_MODE_SIMPLE),
1044 regs_base + TGA_MODE_REG);
1045 }
1046
1047 /**
1048 * tgafb_copyarea - REQUIRED function. Can use generic routines if
1049 * non acclerated hardware and packed pixel based.
1050 * Copies on area of the screen to another area.
1051 *
1052 * @info: frame buffer structure that represents a single frame buffer
1053 * @area: structure defining the source and destination.
1054 */
1055
1056 /* Handle the special case of copying entire lines, e.g. during scrolling.
1057 We can avoid a lot of needless computation in this case. In the 8bpp
1058 case we need to use the COPY64 registers instead of mask writes into
1059 the frame buffer to achieve maximum performance. */
1060
1061 static inline void
1062 copyarea_line_8bpp(struct fb_info *info, u32 dy, u32 sy,
1063 u32 height, u32 width)
1064 {
1065 struct tga_par *par = (struct tga_par *) info->par;
1066 void __iomem *tga_regs = par->tga_regs_base;
1067 unsigned long dpos, spos, i, n64;
1068
1069 /* Set up the MODE and PIXELSHIFT registers. */
1070 __raw_writel(TGA_MODE_SBM_8BPP | TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1071 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1072 wmb();
1073
1074 n64 = (height * width) / 64;
1075
1076 if (sy < dy) {
1077 spos = (sy + height) * width;
1078 dpos = (dy + height) * width;
1079
1080 for (i = 0; i < n64; ++i) {
1081 spos -= 64;
1082 dpos -= 64;
1083 __raw_writel(spos, tga_regs+TGA_COPY64_SRC);
1084 wmb();
1085 __raw_writel(dpos, tga_regs+TGA_COPY64_DST);
1086 wmb();
1087 }
1088 } else {
1089 spos = sy * width;
1090 dpos = dy * width;
1091
1092 for (i = 0; i < n64; ++i) {
1093 __raw_writel(spos, tga_regs+TGA_COPY64_SRC);
1094 wmb();
1095 __raw_writel(dpos, tga_regs+TGA_COPY64_DST);
1096 wmb();
1097 spos += 64;
1098 dpos += 64;
1099 }
1100 }
1101
1102 /* Reset the MODE register to normal. */
1103 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1104 }
1105
1106 static inline void
1107 copyarea_line_32bpp(struct fb_info *info, u32 dy, u32 sy,
1108 u32 height, u32 width)
1109 {
1110 struct tga_par *par = (struct tga_par *) info->par;
1111 void __iomem *tga_regs = par->tga_regs_base;
1112 void __iomem *tga_fb = par->tga_fb_base;
1113 void __iomem *src;
1114 void __iomem *dst;
1115 unsigned long i, n16;
1116
1117 /* Set up the MODE and PIXELSHIFT registers. */
1118 __raw_writel(TGA_MODE_SBM_24BPP | TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1119 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1120 wmb();
1121
1122 n16 = (height * width) / 16;
1123
1124 if (sy < dy) {
1125 src = tga_fb + (sy + height) * width * 4;
1126 dst = tga_fb + (dy + height) * width * 4;
1127
1128 for (i = 0; i < n16; ++i) {
1129 src -= 64;
1130 dst -= 64;
1131 __raw_writel(0xffff, src);
1132 wmb();
1133 __raw_writel(0xffff, dst);
1134 wmb();
1135 }
1136 } else {
1137 src = tga_fb + sy * width * 4;
1138 dst = tga_fb + dy * width * 4;
1139
1140 for (i = 0; i < n16; ++i) {
1141 __raw_writel(0xffff, src);
1142 wmb();
1143 __raw_writel(0xffff, dst);
1144 wmb();
1145 src += 64;
1146 dst += 64;
1147 }
1148 }
1149
1150 /* Reset the MODE register to normal. */
1151 __raw_writel(TGA_MODE_SBM_24BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1152 }
1153
1154 /* The general case of forward copy in 8bpp mode. */
1155 static inline void
1156 copyarea_foreward_8bpp(struct fb_info *info, u32 dx, u32 dy, u32 sx, u32 sy,
1157 u32 height, u32 width, u32 line_length)
1158 {
1159 struct tga_par *par = (struct tga_par *) info->par;
1160 unsigned long i, copied, left;
1161 unsigned long dpos, spos, dalign, salign, yincr;
1162 u32 smask_first, dmask_first, dmask_last;
1163 int pixel_shift, need_prime, need_second;
1164 unsigned long n64, n32, xincr_first;
1165 void __iomem *tga_regs;
1166 void __iomem *tga_fb;
1167
1168 yincr = line_length;
1169 if (dy > sy) {
1170 dy += height - 1;
1171 sy += height - 1;
1172 yincr = -yincr;
1173 }
1174
1175 /* Compute the offsets and alignments in the frame buffer.
1176 More than anything else, these control how we do copies. */
1177 dpos = dy * line_length + dx;
1178 spos = sy * line_length + sx;
1179 dalign = dpos & 7;
1180 salign = spos & 7;
1181 dpos &= -8;
1182 spos &= -8;
1183
1184 /* Compute the value for the PIXELSHIFT register. This controls
1185 both non-co-aligned source and destination and copy direction. */
1186 if (dalign >= salign)
1187 pixel_shift = dalign - salign;
1188 else
1189 pixel_shift = 8 - (salign - dalign);
1190
1191 /* Figure out if we need an additional priming step for the
1192 residue register. */
1193 need_prime = (salign > dalign);
1194 if (need_prime)
1195 dpos -= 8;
1196
1197 /* Begin by copying the leading unaligned destination. Copy enough
1198 to make the next destination address 32-byte aligned. */
1199 copied = 32 - (dalign + (dpos & 31));
1200 if (copied == 32)
1201 copied = 0;
1202 xincr_first = (copied + 7) & -8;
1203 smask_first = dmask_first = (1ul << copied) - 1;
1204 smask_first <<= salign;
1205 dmask_first <<= dalign + need_prime*8;
1206 if (need_prime && copied > 24)
1207 copied -= 8;
1208 left = width - copied;
1209
1210 /* Care for small copies. */
1211 if (copied > width) {
1212 u32 t;
1213 t = (1ul << width) - 1;
1214 t <<= dalign + need_prime*8;
1215 dmask_first &= t;
1216 left = 0;
1217 }
1218
1219 /* Attempt to use 64-byte copies. This is only possible if the
1220 source and destination are co-aligned at 64 bytes. */
1221 n64 = need_second = 0;
1222 if ((dpos & 63) == (spos & 63)
1223 && (height == 1 || line_length % 64 == 0)) {
1224 /* We may need a 32-byte copy to ensure 64 byte alignment. */
1225 need_second = (dpos + xincr_first) & 63;
1226 if ((need_second & 32) != need_second)
1227 printk(KERN_ERR "tgafb: need_second wrong\n");
1228 if (left >= need_second + 64) {
1229 left -= need_second;
1230 n64 = left / 64;
1231 left %= 64;
1232 } else
1233 need_second = 0;
1234 }
1235
1236 /* Copy trailing full 32-byte sections. This will be the main
1237 loop if the 64 byte loop can't be used. */
1238 n32 = left / 32;
1239 left %= 32;
1240
1241 /* Copy the trailing unaligned destination. */
1242 dmask_last = (1ul << left) - 1;
1243
1244 tga_regs = par->tga_regs_base;
1245 tga_fb = par->tga_fb_base;
1246
1247 /* Set up the MODE and PIXELSHIFT registers. */
1248 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1249 __raw_writel(pixel_shift, tga_regs+TGA_PIXELSHIFT_REG);
1250 wmb();
1251
1252 for (i = 0; i < height; ++i) {
1253 unsigned long j;
1254 void __iomem *sfb;
1255 void __iomem *dfb;
1256
1257 sfb = tga_fb + spos;
1258 dfb = tga_fb + dpos;
1259 if (dmask_first) {
1260 __raw_writel(smask_first, sfb);
1261 wmb();
1262 __raw_writel(dmask_first, dfb);
1263 wmb();
1264 sfb += xincr_first;
1265 dfb += xincr_first;
1266 }
1267
1268 if (need_second) {
1269 __raw_writel(0xffffffff, sfb);
1270 wmb();
1271 __raw_writel(0xffffffff, dfb);
1272 wmb();
1273 sfb += 32;
1274 dfb += 32;
1275 }
1276
1277 if (n64 && (((unsigned long)sfb | (unsigned long)dfb) & 63))
1278 printk(KERN_ERR
1279 "tgafb: misaligned copy64 (s:%p, d:%p)\n",
1280 sfb, dfb);
1281
1282 for (j = 0; j < n64; ++j) {
1283 __raw_writel(sfb - tga_fb, tga_regs+TGA_COPY64_SRC);
1284 wmb();
1285 __raw_writel(dfb - tga_fb, tga_regs+TGA_COPY64_DST);
1286 wmb();
1287 sfb += 64;
1288 dfb += 64;
1289 }
1290
1291 for (j = 0; j < n32; ++j) {
1292 __raw_writel(0xffffffff, sfb);
1293 wmb();
1294 __raw_writel(0xffffffff, dfb);
1295 wmb();
1296 sfb += 32;
1297 dfb += 32;
1298 }
1299
1300 if (dmask_last) {
1301 __raw_writel(0xffffffff, sfb);
1302 wmb();
1303 __raw_writel(dmask_last, dfb);
1304 wmb();
1305 }
1306
1307 spos += yincr;
1308 dpos += yincr;
1309 }
1310
1311 /* Reset the MODE register to normal. */
1312 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1313 }
1314
1315 /* The (almost) general case of backward copy in 8bpp mode. */
1316 static inline void
1317 copyarea_backward_8bpp(struct fb_info *info, u32 dx, u32 dy, u32 sx, u32 sy,
1318 u32 height, u32 width, u32 line_length,
1319 const struct fb_copyarea *area)
1320 {
1321 struct tga_par *par = (struct tga_par *) info->par;
1322 unsigned long i, left, yincr;
1323 unsigned long depos, sepos, dealign, sealign;
1324 u32 mask_first, mask_last;
1325 unsigned long n32;
1326 void __iomem *tga_regs;
1327 void __iomem *tga_fb;
1328
1329 yincr = line_length;
1330 if (dy > sy) {
1331 dy += height - 1;
1332 sy += height - 1;
1333 yincr = -yincr;
1334 }
1335
1336 /* Compute the offsets and alignments in the frame buffer.
1337 More than anything else, these control how we do copies. */
1338 depos = dy * line_length + dx + width;
1339 sepos = sy * line_length + sx + width;
1340 dealign = depos & 7;
1341 sealign = sepos & 7;
1342
1343 /* ??? The documentation appears to be incorrect (or very
1344 misleading) wrt how pixel shifting works in backward copy
1345 mode, i.e. when PIXELSHIFT is negative. I give up for now.
1346 Do handle the common case of co-aligned backward copies,
1347 but frob everything else back on generic code. */
1348 if (dealign != sealign) {
1349 cfb_copyarea(info, area);
1350 return;
1351 }
1352
1353 /* We begin the copy with the trailing pixels of the
1354 unaligned destination. */
1355 mask_first = (1ul << dealign) - 1;
1356 left = width - dealign;
1357
1358 /* Care for small copies. */
1359 if (dealign > width) {
1360 mask_first ^= (1ul << (dealign - width)) - 1;
1361 left = 0;
1362 }
1363
1364 /* Next copy full words at a time. */
1365 n32 = left / 32;
1366 left %= 32;
1367
1368 /* Finally copy the unaligned head of the span. */
1369 mask_last = -1 << (32 - left);
1370
1371 tga_regs = par->tga_regs_base;
1372 tga_fb = par->tga_fb_base;
1373
1374 /* Set up the MODE and PIXELSHIFT registers. */
1375 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1376 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1377 wmb();
1378
1379 for (i = 0; i < height; ++i) {
1380 unsigned long j;
1381 void __iomem *sfb;
1382 void __iomem *dfb;
1383
1384 sfb = tga_fb + sepos;
1385 dfb = tga_fb + depos;
1386 if (mask_first) {
1387 __raw_writel(mask_first, sfb);
1388 wmb();
1389 __raw_writel(mask_first, dfb);
1390 wmb();
1391 }
1392
1393 for (j = 0; j < n32; ++j) {
1394 sfb -= 32;
1395 dfb -= 32;
1396 __raw_writel(0xffffffff, sfb);
1397 wmb();
1398 __raw_writel(0xffffffff, dfb);
1399 wmb();
1400 }
1401
1402 if (mask_last) {
1403 sfb -= 32;
1404 dfb -= 32;
1405 __raw_writel(mask_last, sfb);
1406 wmb();
1407 __raw_writel(mask_last, dfb);
1408 wmb();
1409 }
1410
1411 sepos += yincr;
1412 depos += yincr;
1413 }
1414
1415 /* Reset the MODE register to normal. */
1416 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1417 }
1418
1419 static void
1420 tgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1421 {
1422 unsigned long dx, dy, width, height, sx, sy, vxres, vyres;
1423 unsigned long line_length, bpp;
1424
1425 dx = area->dx;
1426 dy = area->dy;
1427 width = area->width;
1428 height = area->height;
1429 sx = area->sx;
1430 sy = area->sy;
1431 vxres = info->var.xres_virtual;
1432 vyres = info->var.yres_virtual;
1433 line_length = info->fix.line_length;
1434
1435 /* The top left corners must be in the virtual screen. */
1436 if (dx > vxres || sx > vxres || dy > vyres || sy > vyres)
1437 return;
1438
1439 /* Clip the destination. */
1440 if (dx + width > vxres)
1441 width = vxres - dx;
1442 if (dy + height > vyres)
1443 height = vyres - dy;
1444
1445 /* The source must be completely inside the virtual screen. */
1446 if (sx + width > vxres || sy + height > vyres)
1447 return;
1448
1449 bpp = info->var.bits_per_pixel;
1450
1451 /* Detect copies of the entire line. */
1452 if (width * (bpp >> 3) == line_length) {
1453 if (bpp == 8)
1454 copyarea_line_8bpp(info, dy, sy, height, width);
1455 else
1456 copyarea_line_32bpp(info, dy, sy, height, width);
1457 }
1458
1459 /* ??? The documentation is unclear to me exactly how the pixelshift
1460 register works in 32bpp mode. Since I don't have hardware to test,
1461 give up for now and fall back on the generic routines. */
1462 else if (bpp == 32)
1463 cfb_copyarea(info, area);
1464
1465 /* Detect overlapping source and destination that requires
1466 a backward copy. */
1467 else if (dy == sy && dx > sx && dx < sx + width)
1468 copyarea_backward_8bpp(info, dx, dy, sx, sy, height,
1469 width, line_length, area);
1470 else
1471 copyarea_foreward_8bpp(info, dx, dy, sx, sy, height,
1472 width, line_length);
1473 }
1474
1475
1476 /*
1477 * Initialisation
1478 */
1479
1480 static void
1481 tgafb_init_fix(struct fb_info *info)
1482 {
1483 struct tga_par *par = (struct tga_par *)info->par;
1484 int tga_bus_pci = TGA_BUS_PCI(par->dev);
1485 int tga_bus_tc = TGA_BUS_TC(par->dev);
1486 u8 tga_type = par->tga_type;
1487 const char *tga_type_name = NULL;
1488
1489 switch (tga_type) {
1490 case TGA_TYPE_8PLANE:
1491 if (tga_bus_pci)
1492 tga_type_name = "Digital ZLXp-E1";
1493 if (tga_bus_tc)
1494 tga_type_name = "Digital ZLX-E1";
1495 break;
1496 case TGA_TYPE_24PLANE:
1497 if (tga_bus_pci)
1498 tga_type_name = "Digital ZLXp-E2";
1499 if (tga_bus_tc)
1500 tga_type_name = "Digital ZLX-E2";
1501 break;
1502 case TGA_TYPE_24PLUSZ:
1503 if (tga_bus_pci)
1504 tga_type_name = "Digital ZLXp-E3";
1505 if (tga_bus_tc)
1506 tga_type_name = "Digital ZLX-E3";
1507 break;
1508 default:
1509 tga_type_name = "Unknown";
1510 break;
1511 }
1512
1513 strlcpy(info->fix.id, tga_type_name, sizeof(info->fix.id));
1514
1515 info->fix.type = FB_TYPE_PACKED_PIXELS;
1516 info->fix.type_aux = 0;
1517 info->fix.visual = (tga_type == TGA_TYPE_8PLANE
1518 ? FB_VISUAL_PSEUDOCOLOR
1519 : FB_VISUAL_DIRECTCOLOR);
1520
1521 info->fix.line_length = par->xres * (par->bits_per_pixel >> 3);
1522 info->fix.smem_start = (size_t) par->tga_fb_base;
1523 info->fix.smem_len = info->fix.line_length * par->yres;
1524 info->fix.mmio_start = (size_t) par->tga_regs_base;
1525 info->fix.mmio_len = 512;
1526
1527 info->fix.xpanstep = 0;
1528 info->fix.ypanstep = 0;
1529 info->fix.ywrapstep = 0;
1530
1531 info->fix.accel = FB_ACCEL_DEC_TGA;
1532
1533 /*
1534 * These are needed by fb_set_logo_truepalette(), so we
1535 * set them here for 24-plane cards.
1536 */
1537 if (tga_type != TGA_TYPE_8PLANE) {
1538 info->var.red.length = 8;
1539 info->var.green.length = 8;
1540 info->var.blue.length = 8;
1541 info->var.red.offset = 16;
1542 info->var.green.offset = 8;
1543 info->var.blue.offset = 0;
1544 }
1545 }
1546
1547 static int tgafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
1548 {
1549 /* We just use this to catch switches out of graphics mode. */
1550 tgafb_set_par(info); /* A bit of overkill for BASE_ADDR reset. */
1551 return 0;
1552 }
1553
1554 static int __devinit
1555 tgafb_register(struct device *dev)
1556 {
1557 static const struct fb_videomode modedb_tc = {
1558 /* 1280x1024 @ 72 Hz, 76.8 kHz hsync */
1559 "1280x1024@72", 0, 1280, 1024, 7645, 224, 28, 33, 3, 160, 3,
1560 FB_SYNC_ON_GREEN, FB_VMODE_NONINTERLACED
1561 };
1562
1563 static unsigned int const fb_offset_presets[4] = {
1564 TGA_8PLANE_FB_OFFSET,
1565 TGA_24PLANE_FB_OFFSET,
1566 0xffffffff,
1567 TGA_24PLUSZ_FB_OFFSET
1568 };
1569
1570 const struct fb_videomode *modedb_tga = NULL;
1571 resource_size_t bar0_start = 0, bar0_len = 0;
1572 const char *mode_option_tga = NULL;
1573 int tga_bus_pci = TGA_BUS_PCI(dev);
1574 int tga_bus_tc = TGA_BUS_TC(dev);
1575 unsigned int modedbsize_tga = 0;
1576 void __iomem *mem_base;
1577 struct fb_info *info;
1578 struct tga_par *par;
1579 u8 tga_type;
1580 int ret = 0;
1581
1582 /* Enable device in PCI config. */
1583 if (tga_bus_pci && pci_enable_device(to_pci_dev(dev))) {
1584 printk(KERN_ERR "tgafb: Cannot enable PCI device\n");
1585 return -ENODEV;
1586 }
1587
1588 /* Allocate the fb and par structures. */
1589 info = framebuffer_alloc(sizeof(struct tga_par), dev);
1590 if (!info) {
1591 printk(KERN_ERR "tgafb: Cannot allocate memory\n");
1592 return -ENOMEM;
1593 }
1594
1595 par = info->par;
1596 dev_set_drvdata(dev, info);
1597
1598 /* Request the mem regions. */
1599 ret = -ENODEV;
1600 if (tga_bus_pci) {
1601 bar0_start = pci_resource_start(to_pci_dev(dev), 0);
1602 bar0_len = pci_resource_len(to_pci_dev(dev), 0);
1603 }
1604 if (tga_bus_tc) {
1605 bar0_start = to_tc_dev(dev)->resource.start;
1606 bar0_len = to_tc_dev(dev)->resource.end - bar0_start + 1;
1607 }
1608 if (!request_mem_region (bar0_start, bar0_len, "tgafb")) {
1609 printk(KERN_ERR "tgafb: cannot reserve FB region\n");
1610 goto err0;
1611 }
1612
1613 /* Map the framebuffer. */
1614 mem_base = ioremap_nocache(bar0_start, bar0_len);
1615 if (!mem_base) {
1616 printk(KERN_ERR "tgafb: Cannot map MMIO\n");
1617 goto err1;
1618 }
1619
1620 /* Grab info about the card. */
1621 tga_type = (readl(mem_base) >> 12) & 0x0f;
1622 par->dev = dev;
1623 par->tga_mem_base = mem_base;
1624 par->tga_fb_base = mem_base + fb_offset_presets[tga_type];
1625 par->tga_regs_base = mem_base + TGA_REGS_OFFSET;
1626 par->tga_type = tga_type;
1627 if (tga_bus_pci)
1628 par->tga_chip_rev = (to_pci_dev(dev))->revision;
1629 if (tga_bus_tc)
1630 par->tga_chip_rev = TGA_READ_REG(par, TGA_START_REG) & 0xff;
1631
1632 /* Setup framebuffer. */
1633 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
1634 FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_FILLRECT;
1635 info->fbops = &tgafb_ops;
1636 info->screen_base = par->tga_fb_base;
1637 info->pseudo_palette = par->palette;
1638
1639 /* This should give a reasonable default video mode. */
1640 if (tga_bus_pci) {
1641 mode_option_tga = mode_option_pci;
1642 }
1643 if (tga_bus_tc) {
1644 mode_option_tga = mode_option_tc;
1645 modedb_tga = &modedb_tc;
1646 modedbsize_tga = 1;
1647 }
1648 ret = fb_find_mode(&info->var, info,
1649 mode_option ? mode_option : mode_option_tga,
1650 modedb_tga, modedbsize_tga, NULL,
1651 tga_type == TGA_TYPE_8PLANE ? 8 : 32);
1652 if (ret == 0 || ret == 4) {
1653 printk(KERN_ERR "tgafb: Could not find valid video mode\n");
1654 ret = -EINVAL;
1655 goto err1;
1656 }
1657
1658 if (fb_alloc_cmap(&info->cmap, 256, 0)) {
1659 printk(KERN_ERR "tgafb: Could not allocate color map\n");
1660 ret = -ENOMEM;
1661 goto err1;
1662 }
1663
1664 tgafb_set_par(info);
1665 tgafb_init_fix(info);
1666
1667 if (register_framebuffer(info) < 0) {
1668 printk(KERN_ERR "tgafb: Could not register framebuffer\n");
1669 ret = -EINVAL;
1670 goto err1;
1671 }
1672
1673 if (tga_bus_pci) {
1674 pr_info("tgafb: DC21030 [TGA] detected, rev=0x%02x\n",
1675 par->tga_chip_rev);
1676 pr_info("tgafb: at PCI bus %d, device %d, function %d\n",
1677 to_pci_dev(dev)->bus->number,
1678 PCI_SLOT(to_pci_dev(dev)->devfn),
1679 PCI_FUNC(to_pci_dev(dev)->devfn));
1680 }
1681 if (tga_bus_tc)
1682 pr_info("tgafb: SFB+ detected, rev=0x%02x\n",
1683 par->tga_chip_rev);
1684 pr_info("fb%d: %s frame buffer device at 0x%lx\n",
1685 info->node, info->fix.id, (long)bar0_start);
1686
1687 return 0;
1688
1689 err1:
1690 if (mem_base)
1691 iounmap(mem_base);
1692 release_mem_region(bar0_start, bar0_len);
1693 err0:
1694 framebuffer_release(info);
1695 return ret;
1696 }
1697
1698 static void __devexit
1699 tgafb_unregister(struct device *dev)
1700 {
1701 resource_size_t bar0_start = 0, bar0_len = 0;
1702 int tga_bus_pci = TGA_BUS_PCI(dev);
1703 int tga_bus_tc = TGA_BUS_TC(dev);
1704 struct fb_info *info = NULL;
1705 struct tga_par *par;
1706
1707 info = dev_get_drvdata(dev);
1708 if (!info)
1709 return;
1710
1711 par = info->par;
1712 unregister_framebuffer(info);
1713 fb_dealloc_cmap(&info->cmap);
1714 iounmap(par->tga_mem_base);
1715 if (tga_bus_pci) {
1716 bar0_start = pci_resource_start(to_pci_dev(dev), 0);
1717 bar0_len = pci_resource_len(to_pci_dev(dev), 0);
1718 }
1719 if (tga_bus_tc) {
1720 bar0_start = to_tc_dev(dev)->resource.start;
1721 bar0_len = to_tc_dev(dev)->resource.end - bar0_start + 1;
1722 }
1723 release_mem_region(bar0_start, bar0_len);
1724 framebuffer_release(info);
1725 }
1726
1727 static void __devexit
1728 tgafb_exit(void)
1729 {
1730 tc_unregister_driver(&tgafb_tc_driver);
1731 pci_unregister_driver(&tgafb_pci_driver);
1732 }
1733
1734 #ifndef MODULE
1735 static int __devinit
1736 tgafb_setup(char *arg)
1737 {
1738 char *this_opt;
1739
1740 if (arg && *arg) {
1741 while ((this_opt = strsep(&arg, ","))) {
1742 if (!*this_opt)
1743 continue;
1744 if (!strncmp(this_opt, "mode:", 5))
1745 mode_option = this_opt+5;
1746 else
1747 printk(KERN_ERR
1748 "tgafb: unknown parameter %s\n",
1749 this_opt);
1750 }
1751 }
1752
1753 return 0;
1754 }
1755 #endif /* !MODULE */
1756
1757 static int __devinit
1758 tgafb_init(void)
1759 {
1760 int status;
1761 #ifndef MODULE
1762 char *option = NULL;
1763
1764 if (fb_get_options("tgafb", &option))
1765 return -ENODEV;
1766 tgafb_setup(option);
1767 #endif
1768 status = pci_register_driver(&tgafb_pci_driver);
1769 if (!status)
1770 status = tc_register_driver(&tgafb_tc_driver);
1771 return status;
1772 }
1773
1774 /*
1775 * Modularisation
1776 */
1777
1778 module_init(tgafb_init);
1779 module_exit(tgafb_exit);
1780
1781 MODULE_DESCRIPTION("Framebuffer driver for TGA/SFB+ chipset");
1782 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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