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Linux 4.19.133
[linux/fpc-iii.git] / drivers / video / fbdev / tgafb.c
blob65ba9921506e2b818f05fa4a308ac383f90c7ddf
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, 2007 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/compiler.h>
17 #include <linux/delay.h>
18 #include <linux/device.h>
19 #include <linux/errno.h>
20 #include <linux/fb.h>
21 #include <linux/init.h>
22 #include <linux/ioport.h>
23 #include <linux/kernel.h>
24 #include <linux/mm.h>
25 #include <linux/module.h>
26 #include <linux/pci.h>
27 #include <linux/selection.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_TC
36 #define TGA_BUS_TC(dev) (dev->bus == &tc_bus_type)
37 #else
38 #define TGA_BUS_TC(dev) 0
39 #endif
40
41 /*
42 * Local functions.
43 */
44
45 static int tgafb_check_var(struct fb_var_screeninfo *, struct fb_info *);
46 static int tgafb_set_par(struct fb_info *);
47 static void tgafb_set_pll(struct tga_par *, int);
48 static int tgafb_setcolreg(unsigned, unsigned, unsigned, unsigned,
49 unsigned, struct fb_info *);
50 static int tgafb_blank(int, struct fb_info *);
51 static void tgafb_init_fix(struct fb_info *);
52
53 static void tgafb_imageblit(struct fb_info *, const struct fb_image *);
54 static void tgafb_fillrect(struct fb_info *, const struct fb_fillrect *);
55 static void tgafb_copyarea(struct fb_info *, const struct fb_copyarea *);
56 static int tgafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info);
57
58 static int tgafb_register(struct device *dev);
59 static void tgafb_unregister(struct device *dev);
60
61 static const char *mode_option;
62 static const char *mode_option_pci = "640x480@60";
63 static const char *mode_option_tc = "1280x1024@72";
64
65
66 static struct pci_driver tgafb_pci_driver;
67 static struct tc_driver tgafb_tc_driver;
68
69 /*
70 * Frame buffer operations
71 */
72
73 static struct fb_ops tgafb_ops = {
74 .owner = THIS_MODULE,
75 .fb_check_var = tgafb_check_var,
76 .fb_set_par = tgafb_set_par,
77 .fb_setcolreg = tgafb_setcolreg,
78 .fb_blank = tgafb_blank,
79 .fb_pan_display = tgafb_pan_display,
80 .fb_fillrect = tgafb_fillrect,
81 .fb_copyarea = tgafb_copyarea,
82 .fb_imageblit = tgafb_imageblit,
83 };
84
85
86 #ifdef CONFIG_PCI
87 /*
88 * PCI registration operations
89 */
90 static int tgafb_pci_register(struct pci_dev *, const struct pci_device_id *);
91 static void tgafb_pci_unregister(struct pci_dev *);
92
93 static struct pci_device_id const tgafb_pci_table[] = {
94 { PCI_DEVICE(PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TGA) },
95 { }
96 };
97 MODULE_DEVICE_TABLE(pci, tgafb_pci_table);
98
99 static struct pci_driver tgafb_pci_driver = {
100 .name = "tgafb",
101 .id_table = tgafb_pci_table,
102 .probe = tgafb_pci_register,
103 .remove = tgafb_pci_unregister,
104 };
105
106 static int tgafb_pci_register(struct pci_dev *pdev,
107 const struct pci_device_id *ent)
108 {
109 return tgafb_register(&pdev->dev);
110 }
111
112 static void tgafb_pci_unregister(struct pci_dev *pdev)
113 {
114 tgafb_unregister(&pdev->dev);
115 }
116 #endif /* CONFIG_PCI */
117
118 #ifdef CONFIG_TC
119 /*
120 * TC registration operations
121 */
122 static int tgafb_tc_register(struct device *);
123 static int tgafb_tc_unregister(struct device *);
124
125 static struct tc_device_id const tgafb_tc_table[] = {
126 { "DEC ", "PMAGD-AA" },
127 { "DEC ", "PMAGD " },
128 { }
129 };
130 MODULE_DEVICE_TABLE(tc, tgafb_tc_table);
131
132 static struct tc_driver tgafb_tc_driver = {
133 .id_table = tgafb_tc_table,
134 .driver = {
135 .name = "tgafb",
136 .bus = &tc_bus_type,
137 .probe = tgafb_tc_register,
138 .remove = tgafb_tc_unregister,
139 },
140 };
141
142 static int tgafb_tc_register(struct device *dev)
143 {
144 int status = tgafb_register(dev);
145 if (!status)
146 get_device(dev);
147 return status;
148 }
149
150 static int tgafb_tc_unregister(struct device *dev)
151 {
152 put_device(dev);
153 tgafb_unregister(dev);
154 return 0;
155 }
156 #endif /* CONFIG_TC */
157
158
159 /**
160 * tgafb_check_var - Optional function. Validates a var passed in.
161 * @var: frame buffer variable screen structure
162 * @info: frame buffer structure that represents a single frame buffer
163 */
164 static int
165 tgafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
166 {
167 struct tga_par *par = (struct tga_par *)info->par;
168
169 if (par->tga_type == TGA_TYPE_8PLANE) {
170 if (var->bits_per_pixel != 8)
171 return -EINVAL;
172 } else {
173 if (var->bits_per_pixel != 32)
174 return -EINVAL;
175 }
176 var->red.length = var->green.length = var->blue.length = 8;
177 if (var->bits_per_pixel == 32) {
178 var->red.offset = 16;
179 var->green.offset = 8;
180 var->blue.offset = 0;
181 }
182
183 if (var->xres_virtual != var->xres || var->yres_virtual != var->yres)
184 return -EINVAL;
185 if (var->xres * var->yres * (var->bits_per_pixel >> 3) > info->fix.smem_len)
186 return -EINVAL;
187 if (var->nonstd)
188 return -EINVAL;
189 if (1000000000 / var->pixclock > TGA_PLL_MAX_FREQ)
190 return -EINVAL;
191 if ((var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
192 return -EINVAL;
193
194 /* Some of the acceleration routines assume the line width is
195 a multiple of 8 bytes. */
196 if (var->xres * (par->tga_type == TGA_TYPE_8PLANE ? 1 : 4) % 8)
197 return -EINVAL;
198
199 return 0;
200 }
201
202 /**
203 * tgafb_set_par - Optional function. Alters the hardware state.
204 * @info: frame buffer structure that represents a single frame buffer
205 */
206 static int
207 tgafb_set_par(struct fb_info *info)
208 {
209 static unsigned int const deep_presets[4] = {
210 0x00004000,
211 0x0000440d,
212 0xffffffff,
213 0x0000441d
214 };
215 static unsigned int const rasterop_presets[4] = {
216 0x00000003,
217 0x00000303,
218 0xffffffff,
219 0x00000303
220 };
221 static unsigned int const mode_presets[4] = {
222 0x00000000,
223 0x00000300,
224 0xffffffff,
225 0x00000300
226 };
227 static unsigned int const base_addr_presets[4] = {
228 0x00000000,
229 0x00000001,
230 0xffffffff,
231 0x00000001
232 };
233
234 struct tga_par *par = (struct tga_par *) info->par;
235 int tga_bus_pci = dev_is_pci(par->dev);
236 int tga_bus_tc = TGA_BUS_TC(par->dev);
237 u32 htimings, vtimings, pll_freq;
238 u8 tga_type;
239 int i;
240
241 /* Encode video timings. */
242 htimings = (((info->var.xres/4) & TGA_HORIZ_ACT_LSB)
243 | (((info->var.xres/4) & 0x600 << 19) & TGA_HORIZ_ACT_MSB));
244 vtimings = (info->var.yres & TGA_VERT_ACTIVE);
245 htimings |= ((info->var.right_margin/4) << 9) & TGA_HORIZ_FP;
246 vtimings |= (info->var.lower_margin << 11) & TGA_VERT_FP;
247 htimings |= ((info->var.hsync_len/4) << 14) & TGA_HORIZ_SYNC;
248 vtimings |= (info->var.vsync_len << 16) & TGA_VERT_SYNC;
249 htimings |= ((info->var.left_margin/4) << 21) & TGA_HORIZ_BP;
250 vtimings |= (info->var.upper_margin << 22) & TGA_VERT_BP;
251
252 if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
253 htimings |= TGA_HORIZ_POLARITY;
254 if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
255 vtimings |= TGA_VERT_POLARITY;
256
257 par->htimings = htimings;
258 par->vtimings = vtimings;
259
260 par->sync_on_green = !!(info->var.sync & FB_SYNC_ON_GREEN);
261
262 /* Store other useful values in par. */
263 par->xres = info->var.xres;
264 par->yres = info->var.yres;
265 par->pll_freq = pll_freq = 1000000000 / info->var.pixclock;
266 par->bits_per_pixel = info->var.bits_per_pixel;
267 info->fix.line_length = par->xres * (par->bits_per_pixel >> 3);
268
269 tga_type = par->tga_type;
270
271 /* First, disable video. */
272 TGA_WRITE_REG(par, TGA_VALID_VIDEO | TGA_VALID_BLANK, TGA_VALID_REG);
273
274 /* Write the DEEP register. */
275 while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
276 continue;
277 mb();
278 TGA_WRITE_REG(par, deep_presets[tga_type] |
279 (par->sync_on_green ? 0x0 : 0x00010000),
280 TGA_DEEP_REG);
281 while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
282 continue;
283 mb();
284
285 /* Write some more registers. */
286 TGA_WRITE_REG(par, rasterop_presets[tga_type], TGA_RASTEROP_REG);
287 TGA_WRITE_REG(par, mode_presets[tga_type], TGA_MODE_REG);
288 TGA_WRITE_REG(par, base_addr_presets[tga_type], TGA_BASE_ADDR_REG);
289
290 /* Calculate & write the PLL. */
291 tgafb_set_pll(par, pll_freq);
292
293 /* Write some more registers. */
294 TGA_WRITE_REG(par, 0xffffffff, TGA_PLANEMASK_REG);
295 TGA_WRITE_REG(par, 0xffffffff, TGA_PIXELMASK_REG);
296
297 /* Init video timing regs. */
298 TGA_WRITE_REG(par, htimings, TGA_HORIZ_REG);
299 TGA_WRITE_REG(par, vtimings, TGA_VERT_REG);
300
301 /* Initialise RAMDAC. */
302 if (tga_type == TGA_TYPE_8PLANE && tga_bus_pci) {
303
304 /* Init BT485 RAMDAC registers. */
305 BT485_WRITE(par, 0xa2 | (par->sync_on_green ? 0x8 : 0x0),
306 BT485_CMD_0);
307 BT485_WRITE(par, 0x01, BT485_ADDR_PAL_WRITE);
308 BT485_WRITE(par, 0x14, BT485_CMD_3); /* cursor 64x64 */
309 BT485_WRITE(par, 0x40, BT485_CMD_1);
310 BT485_WRITE(par, 0x20, BT485_CMD_2); /* cursor off, for now */
311 BT485_WRITE(par, 0xff, BT485_PIXEL_MASK);
312
313 /* Fill palette registers. */
314 BT485_WRITE(par, 0x00, BT485_ADDR_PAL_WRITE);
315 TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
316
317 for (i = 0; i < 256 * 3; i += 4) {
318 TGA_WRITE_REG(par, 0x55 | (BT485_DATA_PAL << 8),
319 TGA_RAMDAC_REG);
320 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
321 TGA_RAMDAC_REG);
322 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
323 TGA_RAMDAC_REG);
324 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
325 TGA_RAMDAC_REG);
326 }
327
328 } else if (tga_type == TGA_TYPE_8PLANE && tga_bus_tc) {
329
330 /* Init BT459 RAMDAC registers. */
331 BT459_WRITE(par, BT459_REG_ACC, BT459_CMD_REG_0, 0x40);
332 BT459_WRITE(par, BT459_REG_ACC, BT459_CMD_REG_1, 0x00);
333 BT459_WRITE(par, BT459_REG_ACC, BT459_CMD_REG_2,
334 (par->sync_on_green ? 0xc0 : 0x40));
335
336 BT459_WRITE(par, BT459_REG_ACC, BT459_CUR_CMD_REG, 0x00);
337
338 /* Fill the palette. */
339 BT459_LOAD_ADDR(par, 0x0000);
340 TGA_WRITE_REG(par, BT459_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
341
342 for (i = 0; i < 256 * 3; i += 4) {
343 TGA_WRITE_REG(par, 0x55, TGA_RAMDAC_REG);
344 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
345 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
346 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
347 }
348
349 } else { /* 24-plane or 24plusZ */
350
351 /* Init BT463 RAMDAC registers. */
352 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_0, 0x40);
353 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_1, 0x08);
354 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_2,
355 (par->sync_on_green ? 0xc0 : 0x40));
356
357 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_0, 0xff);
358 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_1, 0xff);
359 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_2, 0xff);
360 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_3, 0x0f);
361
362 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_0, 0x00);
363 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_1, 0x00);
364 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_2, 0x00);
365 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_3, 0x00);
366
367 /* Fill the palette. */
368 BT463_LOAD_ADDR(par, 0x0000);
369 TGA_WRITE_REG(par, BT463_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
370
371 #ifdef CONFIG_HW_CONSOLE
372 for (i = 0; i < 16; i++) {
373 int j = color_table[i];
374
375 TGA_WRITE_REG(par, default_red[j], TGA_RAMDAC_REG);
376 TGA_WRITE_REG(par, default_grn[j], TGA_RAMDAC_REG);
377 TGA_WRITE_REG(par, default_blu[j], TGA_RAMDAC_REG);
378 }
379 for (i = 0; i < 512 * 3; i += 4) {
380 #else
381 for (i = 0; i < 528 * 3; i += 4) {
382 #endif
383 TGA_WRITE_REG(par, 0x55, TGA_RAMDAC_REG);
384 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
385 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
386 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
387 }
388
389 /* Fill window type table after start of vertical retrace. */
390 while (!(TGA_READ_REG(par, TGA_INTR_STAT_REG) & 0x01))
391 continue;
392 TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
393 mb();
394 while (!(TGA_READ_REG(par, TGA_INTR_STAT_REG) & 0x01))
395 continue;
396 TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
397
398 BT463_LOAD_ADDR(par, BT463_WINDOW_TYPE_BASE);
399 TGA_WRITE_REG(par, BT463_REG_ACC << 2, TGA_RAMDAC_SETUP_REG);
400
401 for (i = 0; i < 16; i++) {
402 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
403 TGA_WRITE_REG(par, 0x01, TGA_RAMDAC_REG);
404 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
405 }
406
407 }
408
409 /* Finally, enable video scan (and pray for the monitor... :-) */
410 TGA_WRITE_REG(par, TGA_VALID_VIDEO, TGA_VALID_REG);
411
412 return 0;
413 }
414
415 #define DIFFCHECK(X) \
416 do { \
417 if (m <= 0x3f) { \
418 int delta = f - (TGA_PLL_BASE_FREQ * (X)) / (r << shift); \
419 if (delta < 0) \
420 delta = -delta; \
421 if (delta < min_diff) \
422 min_diff = delta, vm = m, va = a, vr = r; \
423 } \
424 } while (0)
425
426 static void
427 tgafb_set_pll(struct tga_par *par, int f)
428 {
429 int n, shift, base, min_diff, target;
430 int r,a,m,vm = 34, va = 1, vr = 30;
431
432 for (r = 0 ; r < 12 ; r++)
433 TGA_WRITE_REG(par, !r, TGA_CLOCK_REG);
434
435 if (f > TGA_PLL_MAX_FREQ)
436 f = TGA_PLL_MAX_FREQ;
437
438 if (f >= TGA_PLL_MAX_FREQ / 2)
439 shift = 0;
440 else if (f >= TGA_PLL_MAX_FREQ / 4)
441 shift = 1;
442 else
443 shift = 2;
444
445 TGA_WRITE_REG(par, shift & 1, TGA_CLOCK_REG);
446 TGA_WRITE_REG(par, shift >> 1, TGA_CLOCK_REG);
447
448 for (r = 0 ; r < 10 ; r++)
449 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
450
451 if (f <= 120000) {
452 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
453 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
454 }
455 else if (f <= 200000) {
456 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
457 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
458 }
459 else {
460 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
461 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
462 }
463
464 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
465 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
466 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
467 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
468 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
469 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
470
471 target = (f << shift) / TGA_PLL_BASE_FREQ;
472 min_diff = TGA_PLL_MAX_FREQ;
473
474 r = 7 / target;
475 if (!r) r = 1;
476
477 base = target * r;
478 while (base < 449) {
479 for (n = base < 7 ? 7 : base; n < base + target && n < 449; n++) {
480 m = ((n + 3) / 7) - 1;
481 a = 0;
482 DIFFCHECK((m + 1) * 7);
483 m++;
484 DIFFCHECK((m + 1) * 7);
485 m = (n / 6) - 1;
486 if ((a = n % 6))
487 DIFFCHECK(n);
488 }
489 r++;
490 base += target;
491 }
492
493 vr--;
494
495 for (r = 0; r < 8; r++)
496 TGA_WRITE_REG(par, (vm >> r) & 1, TGA_CLOCK_REG);
497 for (r = 0; r < 8 ; r++)
498 TGA_WRITE_REG(par, (va >> r) & 1, TGA_CLOCK_REG);
499 for (r = 0; r < 7 ; r++)
500 TGA_WRITE_REG(par, (vr >> r) & 1, TGA_CLOCK_REG);
501 TGA_WRITE_REG(par, ((vr >> 7) & 1)|2, TGA_CLOCK_REG);
502 }
503
504
505 /**
506 * tgafb_setcolreg - Optional function. Sets a color register.
507 * @regno: boolean, 0 copy local, 1 get_user() function
508 * @red: frame buffer colormap structure
509 * @green: The green value which can be up to 16 bits wide
510 * @blue: The blue value which can be up to 16 bits wide.
511 * @transp: If supported the alpha value which can be up to 16 bits wide.
512 * @info: frame buffer info structure
513 */
514 static int
515 tgafb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue,
516 unsigned transp, struct fb_info *info)
517 {
518 struct tga_par *par = (struct tga_par *) info->par;
519 int tga_bus_pci = dev_is_pci(par->dev);
520 int tga_bus_tc = TGA_BUS_TC(par->dev);
521
522 if (regno > 255)
523 return 1;
524 red >>= 8;
525 green >>= 8;
526 blue >>= 8;
527
528 if (par->tga_type == TGA_TYPE_8PLANE && tga_bus_pci) {
529 BT485_WRITE(par, regno, BT485_ADDR_PAL_WRITE);
530 TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
531 TGA_WRITE_REG(par, red|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
532 TGA_WRITE_REG(par, green|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
533 TGA_WRITE_REG(par, blue|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
534 } else if (par->tga_type == TGA_TYPE_8PLANE && tga_bus_tc) {
535 BT459_LOAD_ADDR(par, regno);
536 TGA_WRITE_REG(par, BT459_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
537 TGA_WRITE_REG(par, red, TGA_RAMDAC_REG);
538 TGA_WRITE_REG(par, green, TGA_RAMDAC_REG);
539 TGA_WRITE_REG(par, blue, TGA_RAMDAC_REG);
540 } else {
541 if (regno < 16) {
542 u32 value = (regno << 16) | (regno << 8) | regno;
543 ((u32 *)info->pseudo_palette)[regno] = value;
544 }
545 BT463_LOAD_ADDR(par, regno);
546 TGA_WRITE_REG(par, BT463_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
547 TGA_WRITE_REG(par, red, TGA_RAMDAC_REG);
548 TGA_WRITE_REG(par, green, TGA_RAMDAC_REG);
549 TGA_WRITE_REG(par, blue, TGA_RAMDAC_REG);
550 }
551
552 return 0;
553 }
554
555
556 /**
557 * tgafb_blank - Optional function. Blanks the display.
558 * @blank_mode: the blank mode we want.
559 * @info: frame buffer structure that represents a single frame buffer
560 */
561 static int
562 tgafb_blank(int blank, struct fb_info *info)
563 {
564 struct tga_par *par = (struct tga_par *) info->par;
565 u32 vhcr, vvcr, vvvr;
566 unsigned long flags;
567
568 local_irq_save(flags);
569
570 vhcr = TGA_READ_REG(par, TGA_HORIZ_REG);
571 vvcr = TGA_READ_REG(par, TGA_VERT_REG);
572 vvvr = TGA_READ_REG(par, TGA_VALID_REG);
573 vvvr &= ~(TGA_VALID_VIDEO | TGA_VALID_BLANK);
574
575 switch (blank) {
576 case FB_BLANK_UNBLANK: /* Unblanking */
577 if (par->vesa_blanked) {
578 TGA_WRITE_REG(par, vhcr & 0xbfffffff, TGA_HORIZ_REG);
579 TGA_WRITE_REG(par, vvcr & 0xbfffffff, TGA_VERT_REG);
580 par->vesa_blanked = 0;
581 }
582 TGA_WRITE_REG(par, vvvr | TGA_VALID_VIDEO, TGA_VALID_REG);
583 break;
584
585 case FB_BLANK_NORMAL: /* Normal blanking */
586 TGA_WRITE_REG(par, vvvr | TGA_VALID_VIDEO | TGA_VALID_BLANK,
587 TGA_VALID_REG);
588 break;
589
590 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
591 TGA_WRITE_REG(par, vvcr | 0x40000000, TGA_VERT_REG);
592 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
593 par->vesa_blanked = 1;
594 break;
595
596 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
597 TGA_WRITE_REG(par, vhcr | 0x40000000, TGA_HORIZ_REG);
598 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
599 par->vesa_blanked = 1;
600 break;
601
602 case FB_BLANK_POWERDOWN: /* Poweroff */
603 TGA_WRITE_REG(par, vhcr | 0x40000000, TGA_HORIZ_REG);
604 TGA_WRITE_REG(par, vvcr | 0x40000000, TGA_VERT_REG);
605 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
606 par->vesa_blanked = 1;
607 break;
608 }
609
610 local_irq_restore(flags);
611 return 0;
612 }
613
614
615 /*
616 * Acceleration.
617 */
618
619 static void
620 tgafb_mono_imageblit(struct fb_info *info, const struct fb_image *image)
621 {
622 struct tga_par *par = (struct tga_par *) info->par;
623 u32 fgcolor, bgcolor, dx, dy, width, height, vxres, vyres, pixelmask;
624 unsigned long rincr, line_length, shift, pos, is8bpp;
625 unsigned long i, j;
626 const unsigned char *data;
627 void __iomem *regs_base;
628 void __iomem *fb_base;
629
630 is8bpp = info->var.bits_per_pixel == 8;
631
632 dx = image->dx;
633 dy = image->dy;
634 width = image->width;
635 height = image->height;
636 vxres = info->var.xres_virtual;
637 vyres = info->var.yres_virtual;
638 line_length = info->fix.line_length;
639 rincr = (width + 7) / 8;
640
641 /* A shift below cannot cope with. */
642 if (unlikely(width == 0))
643 return;
644 /* Crop the image to the screen. */
645 if (dx > vxres || dy > vyres)
646 return;
647 if (dx + width > vxres)
648 width = vxres - dx;
649 if (dy + height > vyres)
650 height = vyres - dy;
651
652 regs_base = par->tga_regs_base;
653 fb_base = par->tga_fb_base;
654
655 /* Expand the color values to fill 32-bits. */
656 /* ??? Would be nice to notice colour changes elsewhere, so
657 that we can do this only when necessary. */
658 fgcolor = image->fg_color;
659 bgcolor = image->bg_color;
660 if (is8bpp) {
661 fgcolor |= fgcolor << 8;
662 fgcolor |= fgcolor << 16;
663 bgcolor |= bgcolor << 8;
664 bgcolor |= bgcolor << 16;
665 } else {
666 if (fgcolor < 16)
667 fgcolor = ((u32 *)info->pseudo_palette)[fgcolor];
668 if (bgcolor < 16)
669 bgcolor = ((u32 *)info->pseudo_palette)[bgcolor];
670 }
671 __raw_writel(fgcolor, regs_base + TGA_FOREGROUND_REG);
672 __raw_writel(bgcolor, regs_base + TGA_BACKGROUND_REG);
673
674 /* Acquire proper alignment; set up the PIXELMASK register
675 so that we only write the proper character cell. */
676 pos = dy * line_length;
677 if (is8bpp) {
678 pos += dx;
679 shift = pos & 3;
680 pos &= -4;
681 } else {
682 pos += dx * 4;
683 shift = (pos & 7) >> 2;
684 pos &= -8;
685 }
686
687 data = (const unsigned char *) image->data;
688
689 /* Enable opaque stipple mode. */
690 __raw_writel((is8bpp
691 ? TGA_MODE_SBM_8BPP | TGA_MODE_OPAQUE_STIPPLE
692 : TGA_MODE_SBM_24BPP | TGA_MODE_OPAQUE_STIPPLE),
693 regs_base + TGA_MODE_REG);
694
695 if (width + shift <= 32) {
696 unsigned long bwidth;
697
698 /* Handle common case of imaging a single character, in
699 a font less than or 32 pixels wide. */
700
701 /* Avoid a shift by 32; width > 0 implied. */
702 pixelmask = (2ul << (width - 1)) - 1;
703 pixelmask <<= shift;
704 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
705 wmb();
706
707 bwidth = (width + 7) / 8;
708
709 for (i = 0; i < height; ++i) {
710 u32 mask = 0;
711
712 /* The image data is bit big endian; we need
713 little endian. */
714 for (j = 0; j < bwidth; ++j)
715 mask |= bitrev8(data[j]) << (j * 8);
716
717 __raw_writel(mask << shift, fb_base + pos);
718
719 pos += line_length;
720 data += rincr;
721 }
722 wmb();
723 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
724 } else if (shift == 0) {
725 unsigned long pos0 = pos;
726 const unsigned char *data0 = data;
727 unsigned long bincr = (is8bpp ? 8 : 8*4);
728 unsigned long bwidth;
729
730 /* Handle another common case in which accel_putcs
731 generates a large bitmap, which happens to be aligned.
732 Allow the tail to be misaligned. This case is
733 interesting because we've not got to hold partial
734 bytes across the words being written. */
735
736 wmb();
737
738 bwidth = (width / 8) & -4;
739 for (i = 0; i < height; ++i) {
740 for (j = 0; j < bwidth; j += 4) {
741 u32 mask = 0;
742 mask |= bitrev8(data[j+0]) << (0 * 8);
743 mask |= bitrev8(data[j+1]) << (1 * 8);
744 mask |= bitrev8(data[j+2]) << (2 * 8);
745 mask |= bitrev8(data[j+3]) << (3 * 8);
746 __raw_writel(mask, fb_base + pos + j*bincr);
747 }
748 pos += line_length;
749 data += rincr;
750 }
751 wmb();
752
753 pixelmask = (1ul << (width & 31)) - 1;
754 if (pixelmask) {
755 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
756 wmb();
757
758 pos = pos0 + bwidth*bincr;
759 data = data0 + bwidth;
760 bwidth = ((width & 31) + 7) / 8;
761
762 for (i = 0; i < height; ++i) {
763 u32 mask = 0;
764 for (j = 0; j < bwidth; ++j)
765 mask |= bitrev8(data[j]) << (j * 8);
766 __raw_writel(mask, fb_base + pos);
767 pos += line_length;
768 data += rincr;
769 }
770 wmb();
771 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
772 }
773 } else {
774 unsigned long pos0 = pos;
775 const unsigned char *data0 = data;
776 unsigned long bincr = (is8bpp ? 8 : 8*4);
777 unsigned long bwidth;
778
779 /* Finally, handle the generic case of misaligned start.
780 Here we split the write into 16-bit spans. This allows
781 us to use only one pixel mask, instead of four as would
782 be required by writing 24-bit spans. */
783
784 pixelmask = 0xffff << shift;
785 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
786 wmb();
787
788 bwidth = (width / 8) & -2;
789 for (i = 0; i < height; ++i) {
790 for (j = 0; j < bwidth; j += 2) {
791 u32 mask = 0;
792 mask |= bitrev8(data[j+0]) << (0 * 8);
793 mask |= bitrev8(data[j+1]) << (1 * 8);
794 mask <<= shift;
795 __raw_writel(mask, fb_base + pos + j*bincr);
796 }
797 pos += line_length;
798 data += rincr;
799 }
800 wmb();
801
802 pixelmask = ((1ul << (width & 15)) - 1) << shift;
803 if (pixelmask) {
804 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
805 wmb();
806
807 pos = pos0 + bwidth*bincr;
808 data = data0 + bwidth;
809 bwidth = (width & 15) > 8;
810
811 for (i = 0; i < height; ++i) {
812 u32 mask = bitrev8(data[0]);
813 if (bwidth)
814 mask |= bitrev8(data[1]) << 8;
815 mask <<= shift;
816 __raw_writel(mask, fb_base + pos);
817 pos += line_length;
818 data += rincr;
819 }
820 wmb();
821 }
822 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
823 }
824
825 /* Disable opaque stipple mode. */
826 __raw_writel((is8bpp
827 ? TGA_MODE_SBM_8BPP | TGA_MODE_SIMPLE
828 : TGA_MODE_SBM_24BPP | TGA_MODE_SIMPLE),
829 regs_base + TGA_MODE_REG);
830 }
831
832 static void
833 tgafb_clut_imageblit(struct fb_info *info, const struct fb_image *image)
834 {
835 struct tga_par *par = (struct tga_par *) info->par;
836 u32 color, dx, dy, width, height, vxres, vyres;
837 u32 *palette = ((u32 *)info->pseudo_palette);
838 unsigned long pos, line_length, i, j;
839 const unsigned char *data;
840 void __iomem *regs_base, *fb_base;
841
842 dx = image->dx;
843 dy = image->dy;
844 width = image->width;
845 height = image->height;
846 vxres = info->var.xres_virtual;
847 vyres = info->var.yres_virtual;
848 line_length = info->fix.line_length;
849
850 /* Crop the image to the screen. */
851 if (dx > vxres || dy > vyres)
852 return;
853 if (dx + width > vxres)
854 width = vxres - dx;
855 if (dy + height > vyres)
856 height = vyres - dy;
857
858 regs_base = par->tga_regs_base;
859 fb_base = par->tga_fb_base;
860
861 pos = dy * line_length + (dx * 4);
862 data = image->data;
863
864 /* Now copy the image, color_expanding via the palette. */
865 for (i = 0; i < height; i++) {
866 for (j = 0; j < width; j++) {
867 color = palette[*data++];
868 __raw_writel(color, fb_base + pos + j*4);
869 }
870 pos += line_length;
871 }
872 }
873
874 /**
875 * tgafb_imageblit - REQUIRED function. Can use generic routines if
876 * non acclerated hardware and packed pixel based.
877 * Copies a image from system memory to the screen.
878 *
879 * @info: frame buffer structure that represents a single frame buffer
880 * @image: structure defining the image.
881 */
882 static void
883 tgafb_imageblit(struct fb_info *info, const struct fb_image *image)
884 {
885 unsigned int is8bpp = info->var.bits_per_pixel == 8;
886
887 /* If a mono image, regardless of FB depth, go do it. */
888 if (image->depth == 1) {
889 tgafb_mono_imageblit(info, image);
890 return;
891 }
892
893 /* For copies that aren't pixel expansion, there's little we
894 can do better than the generic code. */
895 /* ??? There is a DMA write mode; I wonder if that could be
896 made to pull the data from the image buffer... */
897 if (image->depth == info->var.bits_per_pixel) {
898 cfb_imageblit(info, image);
899 return;
900 }
901
902 /* If 24-plane FB and the image is 8-plane with CLUT, we can do it. */
903 if (!is8bpp && image->depth == 8) {
904 tgafb_clut_imageblit(info, image);
905 return;
906 }
907
908 /* Silently return... */
909 }
910
911 /**
912 * tgafb_fillrect - REQUIRED function. Can use generic routines if
913 * non acclerated hardware and packed pixel based.
914 * Draws a rectangle on the screen.
915 *
916 * @info: frame buffer structure that represents a single frame buffer
917 * @rect: structure defining the rectagle and operation.
918 */
919 static void
920 tgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
921 {
922 struct tga_par *par = (struct tga_par *) info->par;
923 int is8bpp = info->var.bits_per_pixel == 8;
924 u32 dx, dy, width, height, vxres, vyres, color;
925 unsigned long pos, align, line_length, i, j;
926 void __iomem *regs_base;
927 void __iomem *fb_base;
928
929 dx = rect->dx;
930 dy = rect->dy;
931 width = rect->width;
932 height = rect->height;
933 vxres = info->var.xres_virtual;
934 vyres = info->var.yres_virtual;
935 line_length = info->fix.line_length;
936 regs_base = par->tga_regs_base;
937 fb_base = par->tga_fb_base;
938
939 /* Crop the rectangle to the screen. */
940 if (dx > vxres || dy > vyres || !width || !height)
941 return;
942 if (dx + width > vxres)
943 width = vxres - dx;
944 if (dy + height > vyres)
945 height = vyres - dy;
946
947 pos = dy * line_length + dx * (is8bpp ? 1 : 4);
948
949 /* ??? We could implement ROP_XOR with opaque fill mode
950 and a RasterOp setting of GXxor, but as far as I can
951 tell, this mode is not actually used in the kernel.
952 Thus I am ignoring it for now. */
953 if (rect->rop != ROP_COPY) {
954 cfb_fillrect(info, rect);
955 return;
956 }
957
958 /* Expand the color value to fill 8 pixels. */
959 color = rect->color;
960 if (is8bpp) {
961 color |= color << 8;
962 color |= color << 16;
963 __raw_writel(color, regs_base + TGA_BLOCK_COLOR0_REG);
964 __raw_writel(color, regs_base + TGA_BLOCK_COLOR1_REG);
965 } else {
966 if (color < 16)
967 color = ((u32 *)info->pseudo_palette)[color];
968 __raw_writel(color, regs_base + TGA_BLOCK_COLOR0_REG);
969 __raw_writel(color, regs_base + TGA_BLOCK_COLOR1_REG);
970 __raw_writel(color, regs_base + TGA_BLOCK_COLOR2_REG);
971 __raw_writel(color, regs_base + TGA_BLOCK_COLOR3_REG);
972 __raw_writel(color, regs_base + TGA_BLOCK_COLOR4_REG);
973 __raw_writel(color, regs_base + TGA_BLOCK_COLOR5_REG);
974 __raw_writel(color, regs_base + TGA_BLOCK_COLOR6_REG);
975 __raw_writel(color, regs_base + TGA_BLOCK_COLOR7_REG);
976 }
977
978 /* The DATA register holds the fill mask for block fill mode.
979 Since we're not stippling, this is all ones. */
980 __raw_writel(0xffffffff, regs_base + TGA_DATA_REG);
981
982 /* Enable block fill mode. */
983 __raw_writel((is8bpp
984 ? TGA_MODE_SBM_8BPP | TGA_MODE_BLOCK_FILL
985 : TGA_MODE_SBM_24BPP | TGA_MODE_BLOCK_FILL),
986 regs_base + TGA_MODE_REG);
987 wmb();
988
989 /* We can fill 2k pixels per operation. Notice blocks that fit
990 the width of the screen so that we can take advantage of this
991 and fill more than one line per write. */
992 if (width == line_length)
993 width *= height, height = 1;
994
995 /* The write into the frame buffer must be aligned to 4 bytes,
996 but we are allowed to encode the offset within the word in
997 the data word written. */
998 align = (pos & 3) << 16;
999 pos &= -4;
1000
1001 if (width <= 2048) {
1002 u32 data;
1003
1004 data = (width - 1) | align;
1005
1006 for (i = 0; i < height; ++i) {
1007 __raw_writel(data, fb_base + pos);
1008 pos += line_length;
1009 }
1010 } else {
1011 unsigned long Bpp = (is8bpp ? 1 : 4);
1012 unsigned long nwidth = width & -2048;
1013 u32 fdata, ldata;
1014
1015 fdata = (2048 - 1) | align;
1016 ldata = ((width & 2047) - 1) | align;
1017
1018 for (i = 0; i < height; ++i) {
1019 for (j = 0; j < nwidth; j += 2048)
1020 __raw_writel(fdata, fb_base + pos + j*Bpp);
1021 if (j < width)
1022 __raw_writel(ldata, fb_base + pos + j*Bpp);
1023 pos += line_length;
1024 }
1025 }
1026 wmb();
1027
1028 /* Disable block fill mode. */
1029 __raw_writel((is8bpp
1030 ? TGA_MODE_SBM_8BPP | TGA_MODE_SIMPLE
1031 : TGA_MODE_SBM_24BPP | TGA_MODE_SIMPLE),
1032 regs_base + TGA_MODE_REG);
1033 }
1034
1035 /**
1036 * tgafb_copyarea - REQUIRED function. Can use generic routines if
1037 * non acclerated hardware and packed pixel based.
1038 * Copies on area of the screen to another area.
1039 *
1040 * @info: frame buffer structure that represents a single frame buffer
1041 * @area: structure defining the source and destination.
1042 */
1043
1044 /* Handle the special case of copying entire lines, e.g. during scrolling.
1045 We can avoid a lot of needless computation in this case. In the 8bpp
1046 case we need to use the COPY64 registers instead of mask writes into
1047 the frame buffer to achieve maximum performance. */
1048
1049 static inline void
1050 copyarea_line_8bpp(struct fb_info *info, u32 dy, u32 sy,
1051 u32 height, u32 width)
1052 {
1053 struct tga_par *par = (struct tga_par *) info->par;
1054 void __iomem *tga_regs = par->tga_regs_base;
1055 unsigned long dpos, spos, i, n64;
1056
1057 /* Set up the MODE and PIXELSHIFT registers. */
1058 __raw_writel(TGA_MODE_SBM_8BPP | TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1059 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1060 wmb();
1061
1062 n64 = (height * width) / 64;
1063
1064 if (sy < dy) {
1065 spos = (sy + height) * width;
1066 dpos = (dy + height) * width;
1067
1068 for (i = 0; i < n64; ++i) {
1069 spos -= 64;
1070 dpos -= 64;
1071 __raw_writel(spos, tga_regs+TGA_COPY64_SRC);
1072 wmb();
1073 __raw_writel(dpos, tga_regs+TGA_COPY64_DST);
1074 wmb();
1075 }
1076 } else {
1077 spos = sy * width;
1078 dpos = dy * width;
1079
1080 for (i = 0; i < n64; ++i) {
1081 __raw_writel(spos, tga_regs+TGA_COPY64_SRC);
1082 wmb();
1083 __raw_writel(dpos, tga_regs+TGA_COPY64_DST);
1084 wmb();
1085 spos += 64;
1086 dpos += 64;
1087 }
1088 }
1089
1090 /* Reset the MODE register to normal. */
1091 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1092 }
1093
1094 static inline void
1095 copyarea_line_32bpp(struct fb_info *info, u32 dy, u32 sy,
1096 u32 height, u32 width)
1097 {
1098 struct tga_par *par = (struct tga_par *) info->par;
1099 void __iomem *tga_regs = par->tga_regs_base;
1100 void __iomem *tga_fb = par->tga_fb_base;
1101 void __iomem *src;
1102 void __iomem *dst;
1103 unsigned long i, n16;
1104
1105 /* Set up the MODE and PIXELSHIFT registers. */
1106 __raw_writel(TGA_MODE_SBM_24BPP | TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1107 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1108 wmb();
1109
1110 n16 = (height * width) / 16;
1111
1112 if (sy < dy) {
1113 src = tga_fb + (sy + height) * width * 4;
1114 dst = tga_fb + (dy + height) * width * 4;
1115
1116 for (i = 0; i < n16; ++i) {
1117 src -= 64;
1118 dst -= 64;
1119 __raw_writel(0xffff, src);
1120 wmb();
1121 __raw_writel(0xffff, dst);
1122 wmb();
1123 }
1124 } else {
1125 src = tga_fb + sy * width * 4;
1126 dst = tga_fb + dy * width * 4;
1127
1128 for (i = 0; i < n16; ++i) {
1129 __raw_writel(0xffff, src);
1130 wmb();
1131 __raw_writel(0xffff, dst);
1132 wmb();
1133 src += 64;
1134 dst += 64;
1135 }
1136 }
1137
1138 /* Reset the MODE register to normal. */
1139 __raw_writel(TGA_MODE_SBM_24BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1140 }
1141
1142 /* The (almost) general case of backward copy in 8bpp mode. */
1143 static inline void
1144 copyarea_8bpp(struct fb_info *info, u32 dx, u32 dy, u32 sx, u32 sy,
1145 u32 height, u32 width, u32 line_length,
1146 const struct fb_copyarea *area)
1147 {
1148 struct tga_par *par = (struct tga_par *) info->par;
1149 unsigned i, yincr;
1150 int depos, sepos, backward, last_step, step;
1151 u32 mask_last;
1152 unsigned n32;
1153 void __iomem *tga_regs;
1154 void __iomem *tga_fb;
1155
1156 /* Do acceleration only if we are aligned on 8 pixels */
1157 if ((dx | sx | width) & 7) {
1158 cfb_copyarea(info, area);
1159 return;
1160 }
1161
1162 yincr = line_length;
1163 if (dy > sy) {
1164 dy += height - 1;
1165 sy += height - 1;
1166 yincr = -yincr;
1167 }
1168 backward = dy == sy && dx > sx && dx < sx + width;
1169
1170 /* Compute the offsets and alignments in the frame buffer.
1171 More than anything else, these control how we do copies. */
1172 depos = dy * line_length + dx;
1173 sepos = sy * line_length + sx;
1174 if (backward)
1175 depos += width, sepos += width;
1176
1177 /* Next copy full words at a time. */
1178 n32 = width / 32;
1179 last_step = width % 32;
1180
1181 /* Finally copy the unaligned head of the span. */
1182 mask_last = (1ul << last_step) - 1;
1183
1184 if (!backward) {
1185 step = 32;
1186 last_step = 32;
1187 } else {
1188 step = -32;
1189 last_step = -last_step;
1190 sepos -= 32;
1191 depos -= 32;
1192 }
1193
1194 tga_regs = par->tga_regs_base;
1195 tga_fb = par->tga_fb_base;
1196
1197 /* Set up the MODE and PIXELSHIFT registers. */
1198 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1199 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1200 wmb();
1201
1202 for (i = 0; i < height; ++i) {
1203 unsigned long j;
1204 void __iomem *sfb;
1205 void __iomem *dfb;
1206
1207 sfb = tga_fb + sepos;
1208 dfb = tga_fb + depos;
1209
1210 for (j = 0; j < n32; j++) {
1211 if (j < 2 && j + 1 < n32 && !backward &&
1212 !(((unsigned long)sfb | (unsigned long)dfb) & 63)) {
1213 do {
1214 __raw_writel(sfb - tga_fb, tga_regs+TGA_COPY64_SRC);
1215 wmb();
1216 __raw_writel(dfb - tga_fb, tga_regs+TGA_COPY64_DST);
1217 wmb();
1218 sfb += 64;
1219 dfb += 64;
1220 j += 2;
1221 } while (j + 1 < n32);
1222 j--;
1223 continue;
1224 }
1225 __raw_writel(0xffffffff, sfb);
1226 wmb();
1227 __raw_writel(0xffffffff, dfb);
1228 wmb();
1229 sfb += step;
1230 dfb += step;
1231 }
1232
1233 if (mask_last) {
1234 sfb += last_step - step;
1235 dfb += last_step - step;
1236 __raw_writel(mask_last, sfb);
1237 wmb();
1238 __raw_writel(mask_last, dfb);
1239 wmb();
1240 }
1241
1242 sepos += yincr;
1243 depos += yincr;
1244 }
1245
1246 /* Reset the MODE register to normal. */
1247 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1248 }
1249
1250 static void
1251 tgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1252 {
1253 unsigned long dx, dy, width, height, sx, sy, vxres, vyres;
1254 unsigned long line_length, bpp;
1255
1256 dx = area->dx;
1257 dy = area->dy;
1258 width = area->width;
1259 height = area->height;
1260 sx = area->sx;
1261 sy = area->sy;
1262 vxres = info->var.xres_virtual;
1263 vyres = info->var.yres_virtual;
1264 line_length = info->fix.line_length;
1265
1266 /* The top left corners must be in the virtual screen. */
1267 if (dx > vxres || sx > vxres || dy > vyres || sy > vyres)
1268 return;
1269
1270 /* Clip the destination. */
1271 if (dx + width > vxres)
1272 width = vxres - dx;
1273 if (dy + height > vyres)
1274 height = vyres - dy;
1275
1276 /* The source must be completely inside the virtual screen. */
1277 if (sx + width > vxres || sy + height > vyres)
1278 return;
1279
1280 bpp = info->var.bits_per_pixel;
1281
1282 /* Detect copies of the entire line. */
1283 if (!(line_length & 63) && width * (bpp >> 3) == line_length) {
1284 if (bpp == 8)
1285 copyarea_line_8bpp(info, dy, sy, height, width);
1286 else
1287 copyarea_line_32bpp(info, dy, sy, height, width);
1288 }
1289
1290 /* ??? The documentation is unclear to me exactly how the pixelshift
1291 register works in 32bpp mode. Since I don't have hardware to test,
1292 give up for now and fall back on the generic routines. */
1293 else if (bpp == 32)
1294 cfb_copyarea(info, area);
1295
1296 else
1297 copyarea_8bpp(info, dx, dy, sx, sy, height,
1298 width, line_length, area);
1299 }
1300
1301
1302 /*
1303 * Initialisation
1304 */
1305
1306 static void
1307 tgafb_init_fix(struct fb_info *info)
1308 {
1309 struct tga_par *par = (struct tga_par *)info->par;
1310 int tga_bus_pci = dev_is_pci(par->dev);
1311 int tga_bus_tc = TGA_BUS_TC(par->dev);
1312 u8 tga_type = par->tga_type;
1313 const char *tga_type_name = NULL;
1314 unsigned memory_size;
1315
1316 switch (tga_type) {
1317 case TGA_TYPE_8PLANE:
1318 if (tga_bus_pci)
1319 tga_type_name = "Digital ZLXp-E1";
1320 if (tga_bus_tc)
1321 tga_type_name = "Digital ZLX-E1";
1322 memory_size = 2097152;
1323 break;
1324 case TGA_TYPE_24PLANE:
1325 if (tga_bus_pci)
1326 tga_type_name = "Digital ZLXp-E2";
1327 if (tga_bus_tc)
1328 tga_type_name = "Digital ZLX-E2";
1329 memory_size = 8388608;
1330 break;
1331 case TGA_TYPE_24PLUSZ:
1332 if (tga_bus_pci)
1333 tga_type_name = "Digital ZLXp-E3";
1334 if (tga_bus_tc)
1335 tga_type_name = "Digital ZLX-E3";
1336 memory_size = 16777216;
1337 break;
1338 }
1339 if (!tga_type_name) {
1340 tga_type_name = "Unknown";
1341 memory_size = 16777216;
1342 }
1343
1344 strlcpy(info->fix.id, tga_type_name, sizeof(info->fix.id));
1345
1346 info->fix.type = FB_TYPE_PACKED_PIXELS;
1347 info->fix.type_aux = 0;
1348 info->fix.visual = (tga_type == TGA_TYPE_8PLANE
1349 ? FB_VISUAL_PSEUDOCOLOR
1350 : FB_VISUAL_DIRECTCOLOR);
1351
1352 info->fix.smem_start = (size_t) par->tga_fb_base;
1353 info->fix.smem_len = memory_size;
1354 info->fix.mmio_start = (size_t) par->tga_regs_base;
1355 info->fix.mmio_len = 512;
1356
1357 info->fix.xpanstep = 0;
1358 info->fix.ypanstep = 0;
1359 info->fix.ywrapstep = 0;
1360
1361 info->fix.accel = FB_ACCEL_DEC_TGA;
1362
1363 /*
1364 * These are needed by fb_set_logo_truepalette(), so we
1365 * set them here for 24-plane cards.
1366 */
1367 if (tga_type != TGA_TYPE_8PLANE) {
1368 info->var.red.length = 8;
1369 info->var.green.length = 8;
1370 info->var.blue.length = 8;
1371 info->var.red.offset = 16;
1372 info->var.green.offset = 8;
1373 info->var.blue.offset = 0;
1374 }
1375 }
1376
1377 static int tgafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
1378 {
1379 /* We just use this to catch switches out of graphics mode. */
1380 tgafb_set_par(info); /* A bit of overkill for BASE_ADDR reset. */
1381 return 0;
1382 }
1383
1384 static int tgafb_register(struct device *dev)
1385 {
1386 static const struct fb_videomode modedb_tc = {
1387 /* 1280x1024 @ 72 Hz, 76.8 kHz hsync */
1388 "1280x1024@72", 0, 1280, 1024, 7645, 224, 28, 33, 3, 160, 3,
1389 FB_SYNC_ON_GREEN, FB_VMODE_NONINTERLACED
1390 };
1391
1392 static unsigned int const fb_offset_presets[4] = {
1393 TGA_8PLANE_FB_OFFSET,
1394 TGA_24PLANE_FB_OFFSET,
1395 0xffffffff,
1396 TGA_24PLUSZ_FB_OFFSET
1397 };
1398
1399 const struct fb_videomode *modedb_tga = NULL;
1400 resource_size_t bar0_start = 0, bar0_len = 0;
1401 const char *mode_option_tga = NULL;
1402 int tga_bus_pci = dev_is_pci(dev);
1403 int tga_bus_tc = TGA_BUS_TC(dev);
1404 unsigned int modedbsize_tga = 0;
1405 void __iomem *mem_base;
1406 struct fb_info *info;
1407 struct tga_par *par;
1408 u8 tga_type;
1409 int ret = 0;
1410
1411 /* Enable device in PCI config. */
1412 if (tga_bus_pci && pci_enable_device(to_pci_dev(dev))) {
1413 printk(KERN_ERR "tgafb: Cannot enable PCI device\n");
1414 return -ENODEV;
1415 }
1416
1417 /* Allocate the fb and par structures. */
1418 info = framebuffer_alloc(sizeof(struct tga_par), dev);
1419 if (!info) {
1420 printk(KERN_ERR "tgafb: Cannot allocate memory\n");
1421 return -ENOMEM;
1422 }
1423
1424 par = info->par;
1425 dev_set_drvdata(dev, info);
1426
1427 /* Request the mem regions. */
1428 ret = -ENODEV;
1429 if (tga_bus_pci) {
1430 bar0_start = pci_resource_start(to_pci_dev(dev), 0);
1431 bar0_len = pci_resource_len(to_pci_dev(dev), 0);
1432 }
1433 if (tga_bus_tc) {
1434 bar0_start = to_tc_dev(dev)->resource.start;
1435 bar0_len = to_tc_dev(dev)->resource.end - bar0_start + 1;
1436 }
1437 if (!request_mem_region (bar0_start, bar0_len, "tgafb")) {
1438 printk(KERN_ERR "tgafb: cannot reserve FB region\n");
1439 goto err0;
1440 }
1441
1442 /* Map the framebuffer. */
1443 mem_base = ioremap_nocache(bar0_start, bar0_len);
1444 if (!mem_base) {
1445 printk(KERN_ERR "tgafb: Cannot map MMIO\n");
1446 goto err1;
1447 }
1448
1449 /* Grab info about the card. */
1450 tga_type = (readl(mem_base) >> 12) & 0x0f;
1451 par->dev = dev;
1452 par->tga_mem_base = mem_base;
1453 par->tga_fb_base = mem_base + fb_offset_presets[tga_type];
1454 par->tga_regs_base = mem_base + TGA_REGS_OFFSET;
1455 par->tga_type = tga_type;
1456 if (tga_bus_pci)
1457 par->tga_chip_rev = (to_pci_dev(dev))->revision;
1458 if (tga_bus_tc)
1459 par->tga_chip_rev = TGA_READ_REG(par, TGA_START_REG) & 0xff;
1460
1461 /* Setup framebuffer. */
1462 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
1463 FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_FILLRECT;
1464 info->fbops = &tgafb_ops;
1465 info->screen_base = par->tga_fb_base;
1466 info->pseudo_palette = par->palette;
1467
1468 /* This should give a reasonable default video mode. */
1469 if (tga_bus_pci) {
1470 mode_option_tga = mode_option_pci;
1471 }
1472 if (tga_bus_tc) {
1473 mode_option_tga = mode_option_tc;
1474 modedb_tga = &modedb_tc;
1475 modedbsize_tga = 1;
1476 }
1477
1478 tgafb_init_fix(info);
1479
1480 ret = fb_find_mode(&info->var, info,
1481 mode_option ? mode_option : mode_option_tga,
1482 modedb_tga, modedbsize_tga, NULL,
1483 tga_type == TGA_TYPE_8PLANE ? 8 : 32);
1484 if (ret == 0 || ret == 4) {
1485 printk(KERN_ERR "tgafb: Could not find valid video mode\n");
1486 ret = -EINVAL;
1487 goto err1;
1488 }
1489
1490 if (fb_alloc_cmap(&info->cmap, 256, 0)) {
1491 printk(KERN_ERR "tgafb: Could not allocate color map\n");
1492 ret = -ENOMEM;
1493 goto err1;
1494 }
1495
1496 tgafb_set_par(info);
1497
1498 if (register_framebuffer(info) < 0) {
1499 printk(KERN_ERR "tgafb: Could not register framebuffer\n");
1500 ret = -EINVAL;
1501 goto err2;
1502 }
1503
1504 if (tga_bus_pci) {
1505 pr_info("tgafb: DC21030 [TGA] detected, rev=0x%02x\n",
1506 par->tga_chip_rev);
1507 pr_info("tgafb: at PCI bus %d, device %d, function %d\n",
1508 to_pci_dev(dev)->bus->number,
1509 PCI_SLOT(to_pci_dev(dev)->devfn),
1510 PCI_FUNC(to_pci_dev(dev)->devfn));
1511 }
1512 if (tga_bus_tc)
1513 pr_info("tgafb: SFB+ detected, rev=0x%02x\n",
1514 par->tga_chip_rev);
1515 fb_info(info, "%s frame buffer device at 0x%lx\n",
1516 info->fix.id, (long)bar0_start);
1517
1518 return 0;
1519
1520 err2:
1521 fb_dealloc_cmap(&info->cmap);
1522 err1:
1523 if (mem_base)
1524 iounmap(mem_base);
1525 release_mem_region(bar0_start, bar0_len);
1526 err0:
1527 framebuffer_release(info);
1528 return ret;
1529 }
1530
1531 static void tgafb_unregister(struct device *dev)
1532 {
1533 resource_size_t bar0_start = 0, bar0_len = 0;
1534 int tga_bus_pci = dev_is_pci(dev);
1535 int tga_bus_tc = TGA_BUS_TC(dev);
1536 struct fb_info *info = NULL;
1537 struct tga_par *par;
1538
1539 info = dev_get_drvdata(dev);
1540 if (!info)
1541 return;
1542
1543 par = info->par;
1544 unregister_framebuffer(info);
1545 fb_dealloc_cmap(&info->cmap);
1546 iounmap(par->tga_mem_base);
1547 if (tga_bus_pci) {
1548 bar0_start = pci_resource_start(to_pci_dev(dev), 0);
1549 bar0_len = pci_resource_len(to_pci_dev(dev), 0);
1550 }
1551 if (tga_bus_tc) {
1552 bar0_start = to_tc_dev(dev)->resource.start;
1553 bar0_len = to_tc_dev(dev)->resource.end - bar0_start + 1;
1554 }
1555 release_mem_region(bar0_start, bar0_len);
1556 framebuffer_release(info);
1557 }
1558
1559 static void tgafb_exit(void)
1560 {
1561 tc_unregister_driver(&tgafb_tc_driver);
1562 pci_unregister_driver(&tgafb_pci_driver);
1563 }
1564
1565 #ifndef MODULE
1566 static int tgafb_setup(char *arg)
1567 {
1568 char *this_opt;
1569
1570 if (arg && *arg) {
1571 while ((this_opt = strsep(&arg, ","))) {
1572 if (!*this_opt)
1573 continue;
1574 if (!strncmp(this_opt, "mode:", 5))
1575 mode_option = this_opt+5;
1576 else
1577 printk(KERN_ERR
1578 "tgafb: unknown parameter %s\n",
1579 this_opt);
1580 }
1581 }
1582
1583 return 0;
1584 }
1585 #endif /* !MODULE */
1586
1587 static int tgafb_init(void)
1588 {
1589 int status;
1590 #ifndef MODULE
1591 char *option = NULL;
1592
1593 if (fb_get_options("tgafb", &option))
1594 return -ENODEV;
1595 tgafb_setup(option);
1596 #endif
1597 status = pci_register_driver(&tgafb_pci_driver);
1598 if (!status)
1599 status = tc_register_driver(&tgafb_tc_driver);
1600 return status;
1601 }
1602
1603 /*
1604 * Modularisation
1605 */
1606
1607 module_init(tgafb_init);
1608 module_exit(tgafb_exit);
1609
1610 MODULE_DESCRIPTION("Framebuffer driver for TGA/SFB+ chipset");
1611 MODULE_LICENSE("GPL");
Linux with added FPC-III support