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linux/audit.h: move ptrace.h include to kernel header
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / tgafb.c
blobc9c8e5a1fdeef75e7b5a38039514f68f8abebec1
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_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 tgafb_register(struct device *dev);
65 static void 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 tgafb_pci_register(struct pci_dev *, const struct pci_device_id *);
97 static void tgafb_pci_unregister(struct pci_dev *);
98
99 static struct pci_device_id const tgafb_pci_table[] = {
100 { PCI_DEVICE(PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TGA) },
101 { }
102 };
103 MODULE_DEVICE_TABLE(pci, tgafb_pci_table);
104
105 static struct pci_driver tgafb_pci_driver = {
106 .name = "tgafb",
107 .id_table = tgafb_pci_table,
108 .probe = tgafb_pci_register,
109 .remove = tgafb_pci_unregister,
110 };
111
112 static int tgafb_pci_register(struct pci_dev *pdev,
113 const struct pci_device_id *ent)
114 {
115 return tgafb_register(&pdev->dev);
116 }
117
118 static void tgafb_pci_unregister(struct pci_dev *pdev)
119 {
120 tgafb_unregister(&pdev->dev);
121 }
122 #endif /* CONFIG_PCI */
123
124 #ifdef CONFIG_TC
125 /*
126 * TC registration operations
127 */
128 static int tgafb_tc_register(struct device *);
129 static int tgafb_tc_unregister(struct device *);
130
131 static struct tc_device_id const tgafb_tc_table[] = {
132 { "DEC ", "PMAGD-AA" },
133 { "DEC ", "PMAGD " },
134 { }
135 };
136 MODULE_DEVICE_TABLE(tc, tgafb_tc_table);
137
138 static struct tc_driver tgafb_tc_driver = {
139 .id_table = tgafb_tc_table,
140 .driver = {
141 .name = "tgafb",
142 .bus = &tc_bus_type,
143 .probe = tgafb_tc_register,
144 .remove = tgafb_tc_unregister,
145 },
146 };
147
148 static int tgafb_tc_register(struct device *dev)
149 {
150 int status = tgafb_register(dev);
151 if (!status)
152 get_device(dev);
153 return status;
154 }
155
156 static int tgafb_tc_unregister(struct device *dev)
157 {
158 put_device(dev);
159 tgafb_unregister(dev);
160 return 0;
161 }
162 #endif /* CONFIG_TC */
163
164
165 /**
166 * tgafb_check_var - Optional function. Validates a var passed in.
167 * @var: frame buffer variable screen structure
168 * @info: frame buffer structure that represents a single frame buffer
169 */
170 static int
171 tgafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
172 {
173 struct tga_par *par = (struct tga_par *)info->par;
174
175 if (par->tga_type == TGA_TYPE_8PLANE) {
176 if (var->bits_per_pixel != 8)
177 return -EINVAL;
178 } else {
179 if (var->bits_per_pixel != 32)
180 return -EINVAL;
181 }
182 var->red.length = var->green.length = var->blue.length = 8;
183 if (var->bits_per_pixel == 32) {
184 var->red.offset = 16;
185 var->green.offset = 8;
186 var->blue.offset = 0;
187 }
188
189 if (var->xres_virtual != var->xres || var->yres_virtual != var->yres)
190 return -EINVAL;
191 if (var->nonstd)
192 return -EINVAL;
193 if (1000000000 / var->pixclock > TGA_PLL_MAX_FREQ)
194 return -EINVAL;
195 if ((var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
196 return -EINVAL;
197
198 /* Some of the acceleration routines assume the line width is
199 a multiple of 64 bytes. */
200 if (var->xres * (par->tga_type == TGA_TYPE_8PLANE ? 1 : 4) % 64)
201 return -EINVAL;
202
203 return 0;
204 }
205
206 /**
207 * tgafb_set_par - Optional function. Alters the hardware state.
208 * @info: frame buffer structure that represents a single frame buffer
209 */
210 static int
211 tgafb_set_par(struct fb_info *info)
212 {
213 static unsigned int const deep_presets[4] = {
214 0x00004000,
215 0x0000440d,
216 0xffffffff,
217 0x0000441d
218 };
219 static unsigned int const rasterop_presets[4] = {
220 0x00000003,
221 0x00000303,
222 0xffffffff,
223 0x00000303
224 };
225 static unsigned int const mode_presets[4] = {
226 0x00000000,
227 0x00000300,
228 0xffffffff,
229 0x00000300
230 };
231 static unsigned int const base_addr_presets[4] = {
232 0x00000000,
233 0x00000001,
234 0xffffffff,
235 0x00000001
236 };
237
238 struct tga_par *par = (struct tga_par *) info->par;
239 int tga_bus_pci = TGA_BUS_PCI(par->dev);
240 int tga_bus_tc = TGA_BUS_TC(par->dev);
241 u32 htimings, vtimings, pll_freq;
242 u8 tga_type;
243 int i;
244
245 /* Encode video timings. */
246 htimings = (((info->var.xres/4) & TGA_HORIZ_ACT_LSB)
247 | (((info->var.xres/4) & 0x600 << 19) & TGA_HORIZ_ACT_MSB));
248 vtimings = (info->var.yres & TGA_VERT_ACTIVE);
249 htimings |= ((info->var.right_margin/4) << 9) & TGA_HORIZ_FP;
250 vtimings |= (info->var.lower_margin << 11) & TGA_VERT_FP;
251 htimings |= ((info->var.hsync_len/4) << 14) & TGA_HORIZ_SYNC;
252 vtimings |= (info->var.vsync_len << 16) & TGA_VERT_SYNC;
253 htimings |= ((info->var.left_margin/4) << 21) & TGA_HORIZ_BP;
254 vtimings |= (info->var.upper_margin << 22) & TGA_VERT_BP;
255
256 if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
257 htimings |= TGA_HORIZ_POLARITY;
258 if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
259 vtimings |= TGA_VERT_POLARITY;
260
261 par->htimings = htimings;
262 par->vtimings = vtimings;
263
264 par->sync_on_green = !!(info->var.sync & FB_SYNC_ON_GREEN);
265
266 /* Store other useful values in par. */
267 par->xres = info->var.xres;
268 par->yres = info->var.yres;
269 par->pll_freq = pll_freq = 1000000000 / info->var.pixclock;
270 par->bits_per_pixel = info->var.bits_per_pixel;
271
272 tga_type = par->tga_type;
273
274 /* First, disable video. */
275 TGA_WRITE_REG(par, TGA_VALID_VIDEO | TGA_VALID_BLANK, TGA_VALID_REG);
276
277 /* Write the DEEP register. */
278 while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
279 continue;
280 mb();
281 TGA_WRITE_REG(par, deep_presets[tga_type] |
282 (par->sync_on_green ? 0x0 : 0x00010000),
283 TGA_DEEP_REG);
284 while (TGA_READ_REG(par, TGA_CMD_STAT_REG) & 1) /* wait for not busy */
285 continue;
286 mb();
287
288 /* Write some more registers. */
289 TGA_WRITE_REG(par, rasterop_presets[tga_type], TGA_RASTEROP_REG);
290 TGA_WRITE_REG(par, mode_presets[tga_type], TGA_MODE_REG);
291 TGA_WRITE_REG(par, base_addr_presets[tga_type], TGA_BASE_ADDR_REG);
292
293 /* Calculate & write the PLL. */
294 tgafb_set_pll(par, pll_freq);
295
296 /* Write some more registers. */
297 TGA_WRITE_REG(par, 0xffffffff, TGA_PLANEMASK_REG);
298 TGA_WRITE_REG(par, 0xffffffff, TGA_PIXELMASK_REG);
299
300 /* Init video timing regs. */
301 TGA_WRITE_REG(par, htimings, TGA_HORIZ_REG);
302 TGA_WRITE_REG(par, vtimings, TGA_VERT_REG);
303
304 /* Initialise RAMDAC. */
305 if (tga_type == TGA_TYPE_8PLANE && tga_bus_pci) {
306
307 /* Init BT485 RAMDAC registers. */
308 BT485_WRITE(par, 0xa2 | (par->sync_on_green ? 0x8 : 0x0),
309 BT485_CMD_0);
310 BT485_WRITE(par, 0x01, BT485_ADDR_PAL_WRITE);
311 BT485_WRITE(par, 0x14, BT485_CMD_3); /* cursor 64x64 */
312 BT485_WRITE(par, 0x40, BT485_CMD_1);
313 BT485_WRITE(par, 0x20, BT485_CMD_2); /* cursor off, for now */
314 BT485_WRITE(par, 0xff, BT485_PIXEL_MASK);
315
316 /* Fill palette registers. */
317 BT485_WRITE(par, 0x00, BT485_ADDR_PAL_WRITE);
318 TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
319
320 for (i = 0; i < 256 * 3; i += 4) {
321 TGA_WRITE_REG(par, 0x55 | (BT485_DATA_PAL << 8),
322 TGA_RAMDAC_REG);
323 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
324 TGA_RAMDAC_REG);
325 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
326 TGA_RAMDAC_REG);
327 TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
328 TGA_RAMDAC_REG);
329 }
330
331 } else if (tga_type == TGA_TYPE_8PLANE && tga_bus_tc) {
332
333 /* Init BT459 RAMDAC registers. */
334 BT459_WRITE(par, BT459_REG_ACC, BT459_CMD_REG_0, 0x40);
335 BT459_WRITE(par, BT459_REG_ACC, BT459_CMD_REG_1, 0x00);
336 BT459_WRITE(par, BT459_REG_ACC, BT459_CMD_REG_2,
337 (par->sync_on_green ? 0xc0 : 0x40));
338
339 BT459_WRITE(par, BT459_REG_ACC, BT459_CUR_CMD_REG, 0x00);
340
341 /* Fill the palette. */
342 BT459_LOAD_ADDR(par, 0x0000);
343 TGA_WRITE_REG(par, BT459_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
344
345 for (i = 0; i < 256 * 3; i += 4) {
346 TGA_WRITE_REG(par, 0x55, TGA_RAMDAC_REG);
347 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
348 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
349 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
350 }
351
352 } else { /* 24-plane or 24plusZ */
353
354 /* Init BT463 RAMDAC registers. */
355 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_0, 0x40);
356 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_1, 0x08);
357 BT463_WRITE(par, BT463_REG_ACC, BT463_CMD_REG_2,
358 (par->sync_on_green ? 0xc0 : 0x40));
359
360 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_0, 0xff);
361 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_1, 0xff);
362 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_2, 0xff);
363 BT463_WRITE(par, BT463_REG_ACC, BT463_READ_MASK_3, 0x0f);
364
365 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_0, 0x00);
366 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_1, 0x00);
367 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_2, 0x00);
368 BT463_WRITE(par, BT463_REG_ACC, BT463_BLINK_MASK_3, 0x00);
369
370 /* Fill the palette. */
371 BT463_LOAD_ADDR(par, 0x0000);
372 TGA_WRITE_REG(par, BT463_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
373
374 #ifdef CONFIG_HW_CONSOLE
375 for (i = 0; i < 16; i++) {
376 int j = color_table[i];
377
378 TGA_WRITE_REG(par, default_red[j], TGA_RAMDAC_REG);
379 TGA_WRITE_REG(par, default_grn[j], TGA_RAMDAC_REG);
380 TGA_WRITE_REG(par, default_blu[j], TGA_RAMDAC_REG);
381 }
382 for (i = 0; i < 512 * 3; i += 4) {
383 #else
384 for (i = 0; i < 528 * 3; i += 4) {
385 #endif
386 TGA_WRITE_REG(par, 0x55, TGA_RAMDAC_REG);
387 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
388 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
389 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
390 }
391
392 /* Fill window type table after start of vertical retrace. */
393 while (!(TGA_READ_REG(par, TGA_INTR_STAT_REG) & 0x01))
394 continue;
395 TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
396 mb();
397 while (!(TGA_READ_REG(par, TGA_INTR_STAT_REG) & 0x01))
398 continue;
399 TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
400
401 BT463_LOAD_ADDR(par, BT463_WINDOW_TYPE_BASE);
402 TGA_WRITE_REG(par, BT463_REG_ACC << 2, TGA_RAMDAC_SETUP_REG);
403
404 for (i = 0; i < 16; i++) {
405 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
406 TGA_WRITE_REG(par, 0x01, TGA_RAMDAC_REG);
407 TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
408 }
409
410 }
411
412 /* Finally, enable video scan (and pray for the monitor... :-) */
413 TGA_WRITE_REG(par, TGA_VALID_VIDEO, TGA_VALID_REG);
414
415 return 0;
416 }
417
418 #define DIFFCHECK(X) \
419 do { \
420 if (m <= 0x3f) { \
421 int delta = f - (TGA_PLL_BASE_FREQ * (X)) / (r << shift); \
422 if (delta < 0) \
423 delta = -delta; \
424 if (delta < min_diff) \
425 min_diff = delta, vm = m, va = a, vr = r; \
426 } \
427 } while (0)
428
429 static void
430 tgafb_set_pll(struct tga_par *par, int f)
431 {
432 int n, shift, base, min_diff, target;
433 int r,a,m,vm = 34, va = 1, vr = 30;
434
435 for (r = 0 ; r < 12 ; r++)
436 TGA_WRITE_REG(par, !r, TGA_CLOCK_REG);
437
438 if (f > TGA_PLL_MAX_FREQ)
439 f = TGA_PLL_MAX_FREQ;
440
441 if (f >= TGA_PLL_MAX_FREQ / 2)
442 shift = 0;
443 else if (f >= TGA_PLL_MAX_FREQ / 4)
444 shift = 1;
445 else
446 shift = 2;
447
448 TGA_WRITE_REG(par, shift & 1, TGA_CLOCK_REG);
449 TGA_WRITE_REG(par, shift >> 1, TGA_CLOCK_REG);
450
451 for (r = 0 ; r < 10 ; r++)
452 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
453
454 if (f <= 120000) {
455 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
456 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
457 }
458 else if (f <= 200000) {
459 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
460 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
461 }
462 else {
463 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
464 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
465 }
466
467 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
468 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
469 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
470 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
471 TGA_WRITE_REG(par, 0, TGA_CLOCK_REG);
472 TGA_WRITE_REG(par, 1, TGA_CLOCK_REG);
473
474 target = (f << shift) / TGA_PLL_BASE_FREQ;
475 min_diff = TGA_PLL_MAX_FREQ;
476
477 r = 7 / target;
478 if (!r) r = 1;
479
480 base = target * r;
481 while (base < 449) {
482 for (n = base < 7 ? 7 : base; n < base + target && n < 449; n++) {
483 m = ((n + 3) / 7) - 1;
484 a = 0;
485 DIFFCHECK((m + 1) * 7);
486 m++;
487 DIFFCHECK((m + 1) * 7);
488 m = (n / 6) - 1;
489 if ((a = n % 6))
490 DIFFCHECK(n);
491 }
492 r++;
493 base += target;
494 }
495
496 vr--;
497
498 for (r = 0; r < 8; r++)
499 TGA_WRITE_REG(par, (vm >> r) & 1, TGA_CLOCK_REG);
500 for (r = 0; r < 8 ; r++)
501 TGA_WRITE_REG(par, (va >> r) & 1, TGA_CLOCK_REG);
502 for (r = 0; r < 7 ; r++)
503 TGA_WRITE_REG(par, (vr >> r) & 1, TGA_CLOCK_REG);
504 TGA_WRITE_REG(par, ((vr >> 7) & 1)|2, TGA_CLOCK_REG);
505 }
506
507
508 /**
509 * tgafb_setcolreg - Optional function. Sets a color register.
510 * @regno: boolean, 0 copy local, 1 get_user() function
511 * @red: frame buffer colormap structure
512 * @green: The green value which can be up to 16 bits wide
513 * @blue: The blue value which can be up to 16 bits wide.
514 * @transp: If supported the alpha value which can be up to 16 bits wide.
515 * @info: frame buffer info structure
516 */
517 static int
518 tgafb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue,
519 unsigned transp, struct fb_info *info)
520 {
521 struct tga_par *par = (struct tga_par *) info->par;
522 int tga_bus_pci = TGA_BUS_PCI(par->dev);
523 int tga_bus_tc = TGA_BUS_TC(par->dev);
524
525 if (regno > 255)
526 return 1;
527 red >>= 8;
528 green >>= 8;
529 blue >>= 8;
530
531 if (par->tga_type == TGA_TYPE_8PLANE && tga_bus_pci) {
532 BT485_WRITE(par, regno, BT485_ADDR_PAL_WRITE);
533 TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
534 TGA_WRITE_REG(par, red|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
535 TGA_WRITE_REG(par, green|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
536 TGA_WRITE_REG(par, blue|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
537 } else if (par->tga_type == TGA_TYPE_8PLANE && tga_bus_tc) {
538 BT459_LOAD_ADDR(par, regno);
539 TGA_WRITE_REG(par, BT459_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
540 TGA_WRITE_REG(par, red, TGA_RAMDAC_REG);
541 TGA_WRITE_REG(par, green, TGA_RAMDAC_REG);
542 TGA_WRITE_REG(par, blue, TGA_RAMDAC_REG);
543 } else {
544 if (regno < 16) {
545 u32 value = (regno << 16) | (regno << 8) | regno;
546 ((u32 *)info->pseudo_palette)[regno] = value;
547 }
548 BT463_LOAD_ADDR(par, regno);
549 TGA_WRITE_REG(par, BT463_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
550 TGA_WRITE_REG(par, red, TGA_RAMDAC_REG);
551 TGA_WRITE_REG(par, green, TGA_RAMDAC_REG);
552 TGA_WRITE_REG(par, blue, TGA_RAMDAC_REG);
553 }
554
555 return 0;
556 }
557
558
559 /**
560 * tgafb_blank - Optional function. Blanks the display.
561 * @blank_mode: the blank mode we want.
562 * @info: frame buffer structure that represents a single frame buffer
563 */
564 static int
565 tgafb_blank(int blank, struct fb_info *info)
566 {
567 struct tga_par *par = (struct tga_par *) info->par;
568 u32 vhcr, vvcr, vvvr;
569 unsigned long flags;
570
571 local_irq_save(flags);
572
573 vhcr = TGA_READ_REG(par, TGA_HORIZ_REG);
574 vvcr = TGA_READ_REG(par, TGA_VERT_REG);
575 vvvr = TGA_READ_REG(par, TGA_VALID_REG);
576 vvvr &= ~(TGA_VALID_VIDEO | TGA_VALID_BLANK);
577
578 switch (blank) {
579 case FB_BLANK_UNBLANK: /* Unblanking */
580 if (par->vesa_blanked) {
581 TGA_WRITE_REG(par, vhcr & 0xbfffffff, TGA_HORIZ_REG);
582 TGA_WRITE_REG(par, vvcr & 0xbfffffff, TGA_VERT_REG);
583 par->vesa_blanked = 0;
584 }
585 TGA_WRITE_REG(par, vvvr | TGA_VALID_VIDEO, TGA_VALID_REG);
586 break;
587
588 case FB_BLANK_NORMAL: /* Normal blanking */
589 TGA_WRITE_REG(par, vvvr | TGA_VALID_VIDEO | TGA_VALID_BLANK,
590 TGA_VALID_REG);
591 break;
592
593 case FB_BLANK_VSYNC_SUSPEND: /* VESA blank (vsync off) */
594 TGA_WRITE_REG(par, vvcr | 0x40000000, TGA_VERT_REG);
595 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
596 par->vesa_blanked = 1;
597 break;
598
599 case FB_BLANK_HSYNC_SUSPEND: /* VESA blank (hsync off) */
600 TGA_WRITE_REG(par, vhcr | 0x40000000, TGA_HORIZ_REG);
601 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
602 par->vesa_blanked = 1;
603 break;
604
605 case FB_BLANK_POWERDOWN: /* Poweroff */
606 TGA_WRITE_REG(par, vhcr | 0x40000000, TGA_HORIZ_REG);
607 TGA_WRITE_REG(par, vvcr | 0x40000000, TGA_VERT_REG);
608 TGA_WRITE_REG(par, vvvr | TGA_VALID_BLANK, TGA_VALID_REG);
609 par->vesa_blanked = 1;
610 break;
611 }
612
613 local_irq_restore(flags);
614 return 0;
615 }
616
617
618 /*
619 * Acceleration.
620 */
621
622 static void
623 tgafb_mono_imageblit(struct fb_info *info, const struct fb_image *image)
624 {
625 struct tga_par *par = (struct tga_par *) info->par;
626 u32 fgcolor, bgcolor, dx, dy, width, height, vxres, vyres, pixelmask;
627 unsigned long rincr, line_length, shift, pos, is8bpp;
628 unsigned long i, j;
629 const unsigned char *data;
630 void __iomem *regs_base;
631 void __iomem *fb_base;
632
633 is8bpp = info->var.bits_per_pixel == 8;
634
635 dx = image->dx;
636 dy = image->dy;
637 width = image->width;
638 height = image->height;
639 vxres = info->var.xres_virtual;
640 vyres = info->var.yres_virtual;
641 line_length = info->fix.line_length;
642 rincr = (width + 7) / 8;
643
644 /* A shift below cannot cope with. */
645 if (unlikely(width == 0))
646 return;
647 /* Crop the image to the screen. */
648 if (dx > vxres || dy > vyres)
649 return;
650 if (dx + width > vxres)
651 width = vxres - dx;
652 if (dy + height > vyres)
653 height = vyres - dy;
654
655 regs_base = par->tga_regs_base;
656 fb_base = par->tga_fb_base;
657
658 /* Expand the color values to fill 32-bits. */
659 /* ??? Would be nice to notice colour changes elsewhere, so
660 that we can do this only when necessary. */
661 fgcolor = image->fg_color;
662 bgcolor = image->bg_color;
663 if (is8bpp) {
664 fgcolor |= fgcolor << 8;
665 fgcolor |= fgcolor << 16;
666 bgcolor |= bgcolor << 8;
667 bgcolor |= bgcolor << 16;
668 } else {
669 if (fgcolor < 16)
670 fgcolor = ((u32 *)info->pseudo_palette)[fgcolor];
671 if (bgcolor < 16)
672 bgcolor = ((u32 *)info->pseudo_palette)[bgcolor];
673 }
674 __raw_writel(fgcolor, regs_base + TGA_FOREGROUND_REG);
675 __raw_writel(bgcolor, regs_base + TGA_BACKGROUND_REG);
676
677 /* Acquire proper alignment; set up the PIXELMASK register
678 so that we only write the proper character cell. */
679 pos = dy * line_length;
680 if (is8bpp) {
681 pos += dx;
682 shift = pos & 3;
683 pos &= -4;
684 } else {
685 pos += dx * 4;
686 shift = (pos & 7) >> 2;
687 pos &= -8;
688 }
689
690 data = (const unsigned char *) image->data;
691
692 /* Enable opaque stipple mode. */
693 __raw_writel((is8bpp
694 ? TGA_MODE_SBM_8BPP | TGA_MODE_OPAQUE_STIPPLE
695 : TGA_MODE_SBM_24BPP | TGA_MODE_OPAQUE_STIPPLE),
696 regs_base + TGA_MODE_REG);
697
698 if (width + shift <= 32) {
699 unsigned long bwidth;
700
701 /* Handle common case of imaging a single character, in
702 a font less than or 32 pixels wide. */
703
704 /* Avoid a shift by 32; width > 0 implied. */
705 pixelmask = (2ul << (width - 1)) - 1;
706 pixelmask <<= shift;
707 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
708 wmb();
709
710 bwidth = (width + 7) / 8;
711
712 for (i = 0; i < height; ++i) {
713 u32 mask = 0;
714
715 /* The image data is bit big endian; we need
716 little endian. */
717 for (j = 0; j < bwidth; ++j)
718 mask |= bitrev8(data[j]) << (j * 8);
719
720 __raw_writel(mask << shift, fb_base + pos);
721
722 pos += line_length;
723 data += rincr;
724 }
725 wmb();
726 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
727 } else if (shift == 0) {
728 unsigned long pos0 = pos;
729 const unsigned char *data0 = data;
730 unsigned long bincr = (is8bpp ? 8 : 8*4);
731 unsigned long bwidth;
732
733 /* Handle another common case in which accel_putcs
734 generates a large bitmap, which happens to be aligned.
735 Allow the tail to be misaligned. This case is
736 interesting because we've not got to hold partial
737 bytes across the words being written. */
738
739 wmb();
740
741 bwidth = (width / 8) & -4;
742 for (i = 0; i < height; ++i) {
743 for (j = 0; j < bwidth; j += 4) {
744 u32 mask = 0;
745 mask |= bitrev8(data[j+0]) << (0 * 8);
746 mask |= bitrev8(data[j+1]) << (1 * 8);
747 mask |= bitrev8(data[j+2]) << (2 * 8);
748 mask |= bitrev8(data[j+3]) << (3 * 8);
749 __raw_writel(mask, fb_base + pos + j*bincr);
750 }
751 pos += line_length;
752 data += rincr;
753 }
754 wmb();
755
756 pixelmask = (1ul << (width & 31)) - 1;
757 if (pixelmask) {
758 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
759 wmb();
760
761 pos = pos0 + bwidth*bincr;
762 data = data0 + bwidth;
763 bwidth = ((width & 31) + 7) / 8;
764
765 for (i = 0; i < height; ++i) {
766 u32 mask = 0;
767 for (j = 0; j < bwidth; ++j)
768 mask |= bitrev8(data[j]) << (j * 8);
769 __raw_writel(mask, fb_base + pos);
770 pos += line_length;
771 data += rincr;
772 }
773 wmb();
774 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
775 }
776 } else {
777 unsigned long pos0 = pos;
778 const unsigned char *data0 = data;
779 unsigned long bincr = (is8bpp ? 8 : 8*4);
780 unsigned long bwidth;
781
782 /* Finally, handle the generic case of misaligned start.
783 Here we split the write into 16-bit spans. This allows
784 us to use only one pixel mask, instead of four as would
785 be required by writing 24-bit spans. */
786
787 pixelmask = 0xffff << shift;
788 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
789 wmb();
790
791 bwidth = (width / 8) & -2;
792 for (i = 0; i < height; ++i) {
793 for (j = 0; j < bwidth; j += 2) {
794 u32 mask = 0;
795 mask |= bitrev8(data[j+0]) << (0 * 8);
796 mask |= bitrev8(data[j+1]) << (1 * 8);
797 mask <<= shift;
798 __raw_writel(mask, fb_base + pos + j*bincr);
799 }
800 pos += line_length;
801 data += rincr;
802 }
803 wmb();
804
805 pixelmask = ((1ul << (width & 15)) - 1) << shift;
806 if (pixelmask) {
807 __raw_writel(pixelmask, regs_base + TGA_PIXELMASK_REG);
808 wmb();
809
810 pos = pos0 + bwidth*bincr;
811 data = data0 + bwidth;
812 bwidth = (width & 15) > 8;
813
814 for (i = 0; i < height; ++i) {
815 u32 mask = bitrev8(data[0]);
816 if (bwidth)
817 mask |= bitrev8(data[1]) << 8;
818 mask <<= shift;
819 __raw_writel(mask, fb_base + pos);
820 pos += line_length;
821 data += rincr;
822 }
823 wmb();
824 }
825 __raw_writel(0xffffffff, regs_base + TGA_PIXELMASK_REG);
826 }
827
828 /* Disable opaque stipple mode. */
829 __raw_writel((is8bpp
830 ? TGA_MODE_SBM_8BPP | TGA_MODE_SIMPLE
831 : TGA_MODE_SBM_24BPP | TGA_MODE_SIMPLE),
832 regs_base + TGA_MODE_REG);
833 }
834
835 static void
836 tgafb_clut_imageblit(struct fb_info *info, const struct fb_image *image)
837 {
838 struct tga_par *par = (struct tga_par *) info->par;
839 u32 color, dx, dy, width, height, vxres, vyres;
840 u32 *palette = ((u32 *)info->pseudo_palette);
841 unsigned long pos, line_length, i, j;
842 const unsigned char *data;
843 void __iomem *regs_base, *fb_base;
844
845 dx = image->dx;
846 dy = image->dy;
847 width = image->width;
848 height = image->height;
849 vxres = info->var.xres_virtual;
850 vyres = info->var.yres_virtual;
851 line_length = info->fix.line_length;
852
853 /* Crop the image to the screen. */
854 if (dx > vxres || dy > vyres)
855 return;
856 if (dx + width > vxres)
857 width = vxres - dx;
858 if (dy + height > vyres)
859 height = vyres - dy;
860
861 regs_base = par->tga_regs_base;
862 fb_base = par->tga_fb_base;
863
864 pos = dy * line_length + (dx * 4);
865 data = image->data;
866
867 /* Now copy the image, color_expanding via the palette. */
868 for (i = 0; i < height; i++) {
869 for (j = 0; j < width; j++) {
870 color = palette[*data++];
871 __raw_writel(color, fb_base + pos + j*4);
872 }
873 pos += line_length;
874 }
875 }
876
877 /**
878 * tgafb_imageblit - REQUIRED function. Can use generic routines if
879 * non acclerated hardware and packed pixel based.
880 * Copies a image from system memory to the screen.
881 *
882 * @info: frame buffer structure that represents a single frame buffer
883 * @image: structure defining the image.
884 */
885 static void
886 tgafb_imageblit(struct fb_info *info, const struct fb_image *image)
887 {
888 unsigned int is8bpp = info->var.bits_per_pixel == 8;
889
890 /* If a mono image, regardless of FB depth, go do it. */
891 if (image->depth == 1) {
892 tgafb_mono_imageblit(info, image);
893 return;
894 }
895
896 /* For copies that aren't pixel expansion, there's little we
897 can do better than the generic code. */
898 /* ??? There is a DMA write mode; I wonder if that could be
899 made to pull the data from the image buffer... */
900 if (image->depth == info->var.bits_per_pixel) {
901 cfb_imageblit(info, image);
902 return;
903 }
904
905 /* If 24-plane FB and the image is 8-plane with CLUT, we can do it. */
906 if (!is8bpp && image->depth == 8) {
907 tgafb_clut_imageblit(info, image);
908 return;
909 }
910
911 /* Silently return... */
912 }
913
914 /**
915 * tgafb_fillrect - REQUIRED function. Can use generic routines if
916 * non acclerated hardware and packed pixel based.
917 * Draws a rectangle on the screen.
918 *
919 * @info: frame buffer structure that represents a single frame buffer
920 * @rect: structure defining the rectagle and operation.
921 */
922 static void
923 tgafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
924 {
925 struct tga_par *par = (struct tga_par *) info->par;
926 int is8bpp = info->var.bits_per_pixel == 8;
927 u32 dx, dy, width, height, vxres, vyres, color;
928 unsigned long pos, align, line_length, i, j;
929 void __iomem *regs_base;
930 void __iomem *fb_base;
931
932 dx = rect->dx;
933 dy = rect->dy;
934 width = rect->width;
935 height = rect->height;
936 vxres = info->var.xres_virtual;
937 vyres = info->var.yres_virtual;
938 line_length = info->fix.line_length;
939 regs_base = par->tga_regs_base;
940 fb_base = par->tga_fb_base;
941
942 /* Crop the rectangle to the screen. */
943 if (dx > vxres || dy > vyres || !width || !height)
944 return;
945 if (dx + width > vxres)
946 width = vxres - dx;
947 if (dy + height > vyres)
948 height = vyres - dy;
949
950 pos = dy * line_length + dx * (is8bpp ? 1 : 4);
951
952 /* ??? We could implement ROP_XOR with opaque fill mode
953 and a RasterOp setting of GXxor, but as far as I can
954 tell, this mode is not actually used in the kernel.
955 Thus I am ignoring it for now. */
956 if (rect->rop != ROP_COPY) {
957 cfb_fillrect(info, rect);
958 return;
959 }
960
961 /* Expand the color value to fill 8 pixels. */
962 color = rect->color;
963 if (is8bpp) {
964 color |= color << 8;
965 color |= color << 16;
966 __raw_writel(color, regs_base + TGA_BLOCK_COLOR0_REG);
967 __raw_writel(color, regs_base + TGA_BLOCK_COLOR1_REG);
968 } else {
969 if (color < 16)
970 color = ((u32 *)info->pseudo_palette)[color];
971 __raw_writel(color, regs_base + TGA_BLOCK_COLOR0_REG);
972 __raw_writel(color, regs_base + TGA_BLOCK_COLOR1_REG);
973 __raw_writel(color, regs_base + TGA_BLOCK_COLOR2_REG);
974 __raw_writel(color, regs_base + TGA_BLOCK_COLOR3_REG);
975 __raw_writel(color, regs_base + TGA_BLOCK_COLOR4_REG);
976 __raw_writel(color, regs_base + TGA_BLOCK_COLOR5_REG);
977 __raw_writel(color, regs_base + TGA_BLOCK_COLOR6_REG);
978 __raw_writel(color, regs_base + TGA_BLOCK_COLOR7_REG);
979 }
980
981 /* The DATA register holds the fill mask for block fill mode.
982 Since we're not stippling, this is all ones. */
983 __raw_writel(0xffffffff, regs_base + TGA_DATA_REG);
984
985 /* Enable block fill mode. */
986 __raw_writel((is8bpp
987 ? TGA_MODE_SBM_8BPP | TGA_MODE_BLOCK_FILL
988 : TGA_MODE_SBM_24BPP | TGA_MODE_BLOCK_FILL),
989 regs_base + TGA_MODE_REG);
990 wmb();
991
992 /* We can fill 2k pixels per operation. Notice blocks that fit
993 the width of the screen so that we can take advantage of this
994 and fill more than one line per write. */
995 if (width == line_length)
996 width *= height, height = 1;
997
998 /* The write into the frame buffer must be aligned to 4 bytes,
999 but we are allowed to encode the offset within the word in
1000 the data word written. */
1001 align = (pos & 3) << 16;
1002 pos &= -4;
1003
1004 if (width <= 2048) {
1005 u32 data;
1006
1007 data = (width - 1) | align;
1008
1009 for (i = 0; i < height; ++i) {
1010 __raw_writel(data, fb_base + pos);
1011 pos += line_length;
1012 }
1013 } else {
1014 unsigned long Bpp = (is8bpp ? 1 : 4);
1015 unsigned long nwidth = width & -2048;
1016 u32 fdata, ldata;
1017
1018 fdata = (2048 - 1) | align;
1019 ldata = ((width & 2047) - 1) | align;
1020
1021 for (i = 0; i < height; ++i) {
1022 for (j = 0; j < nwidth; j += 2048)
1023 __raw_writel(fdata, fb_base + pos + j*Bpp);
1024 if (j < width)
1025 __raw_writel(ldata, fb_base + pos + j*Bpp);
1026 pos += line_length;
1027 }
1028 }
1029 wmb();
1030
1031 /* Disable block fill mode. */
1032 __raw_writel((is8bpp
1033 ? TGA_MODE_SBM_8BPP | TGA_MODE_SIMPLE
1034 : TGA_MODE_SBM_24BPP | TGA_MODE_SIMPLE),
1035 regs_base + TGA_MODE_REG);
1036 }
1037
1038 /**
1039 * tgafb_copyarea - REQUIRED function. Can use generic routines if
1040 * non acclerated hardware and packed pixel based.
1041 * Copies on area of the screen to another area.
1042 *
1043 * @info: frame buffer structure that represents a single frame buffer
1044 * @area: structure defining the source and destination.
1045 */
1046
1047 /* Handle the special case of copying entire lines, e.g. during scrolling.
1048 We can avoid a lot of needless computation in this case. In the 8bpp
1049 case we need to use the COPY64 registers instead of mask writes into
1050 the frame buffer to achieve maximum performance. */
1051
1052 static inline void
1053 copyarea_line_8bpp(struct fb_info *info, u32 dy, u32 sy,
1054 u32 height, u32 width)
1055 {
1056 struct tga_par *par = (struct tga_par *) info->par;
1057 void __iomem *tga_regs = par->tga_regs_base;
1058 unsigned long dpos, spos, i, n64;
1059
1060 /* Set up the MODE and PIXELSHIFT registers. */
1061 __raw_writel(TGA_MODE_SBM_8BPP | TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1062 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1063 wmb();
1064
1065 n64 = (height * width) / 64;
1066
1067 if (sy < dy) {
1068 spos = (sy + height) * width;
1069 dpos = (dy + height) * width;
1070
1071 for (i = 0; i < n64; ++i) {
1072 spos -= 64;
1073 dpos -= 64;
1074 __raw_writel(spos, tga_regs+TGA_COPY64_SRC);
1075 wmb();
1076 __raw_writel(dpos, tga_regs+TGA_COPY64_DST);
1077 wmb();
1078 }
1079 } else {
1080 spos = sy * width;
1081 dpos = dy * width;
1082
1083 for (i = 0; i < n64; ++i) {
1084 __raw_writel(spos, tga_regs+TGA_COPY64_SRC);
1085 wmb();
1086 __raw_writel(dpos, tga_regs+TGA_COPY64_DST);
1087 wmb();
1088 spos += 64;
1089 dpos += 64;
1090 }
1091 }
1092
1093 /* Reset the MODE register to normal. */
1094 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1095 }
1096
1097 static inline void
1098 copyarea_line_32bpp(struct fb_info *info, u32 dy, u32 sy,
1099 u32 height, u32 width)
1100 {
1101 struct tga_par *par = (struct tga_par *) info->par;
1102 void __iomem *tga_regs = par->tga_regs_base;
1103 void __iomem *tga_fb = par->tga_fb_base;
1104 void __iomem *src;
1105 void __iomem *dst;
1106 unsigned long i, n16;
1107
1108 /* Set up the MODE and PIXELSHIFT registers. */
1109 __raw_writel(TGA_MODE_SBM_24BPP | TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1110 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1111 wmb();
1112
1113 n16 = (height * width) / 16;
1114
1115 if (sy < dy) {
1116 src = tga_fb + (sy + height) * width * 4;
1117 dst = tga_fb + (dy + height) * width * 4;
1118
1119 for (i = 0; i < n16; ++i) {
1120 src -= 64;
1121 dst -= 64;
1122 __raw_writel(0xffff, src);
1123 wmb();
1124 __raw_writel(0xffff, dst);
1125 wmb();
1126 }
1127 } else {
1128 src = tga_fb + sy * width * 4;
1129 dst = tga_fb + dy * width * 4;
1130
1131 for (i = 0; i < n16; ++i) {
1132 __raw_writel(0xffff, src);
1133 wmb();
1134 __raw_writel(0xffff, dst);
1135 wmb();
1136 src += 64;
1137 dst += 64;
1138 }
1139 }
1140
1141 /* Reset the MODE register to normal. */
1142 __raw_writel(TGA_MODE_SBM_24BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1143 }
1144
1145 /* The general case of forward copy in 8bpp mode. */
1146 static inline void
1147 copyarea_foreward_8bpp(struct fb_info *info, u32 dx, u32 dy, u32 sx, u32 sy,
1148 u32 height, u32 width, u32 line_length)
1149 {
1150 struct tga_par *par = (struct tga_par *) info->par;
1151 unsigned long i, copied, left;
1152 unsigned long dpos, spos, dalign, salign, yincr;
1153 u32 smask_first, dmask_first, dmask_last;
1154 int pixel_shift, need_prime, need_second;
1155 unsigned long n64, n32, xincr_first;
1156 void __iomem *tga_regs;
1157 void __iomem *tga_fb;
1158
1159 yincr = line_length;
1160 if (dy > sy) {
1161 dy += height - 1;
1162 sy += height - 1;
1163 yincr = -yincr;
1164 }
1165
1166 /* Compute the offsets and alignments in the frame buffer.
1167 More than anything else, these control how we do copies. */
1168 dpos = dy * line_length + dx;
1169 spos = sy * line_length + sx;
1170 dalign = dpos & 7;
1171 salign = spos & 7;
1172 dpos &= -8;
1173 spos &= -8;
1174
1175 /* Compute the value for the PIXELSHIFT register. This controls
1176 both non-co-aligned source and destination and copy direction. */
1177 if (dalign >= salign)
1178 pixel_shift = dalign - salign;
1179 else
1180 pixel_shift = 8 - (salign - dalign);
1181
1182 /* Figure out if we need an additional priming step for the
1183 residue register. */
1184 need_prime = (salign > dalign);
1185 if (need_prime)
1186 dpos -= 8;
1187
1188 /* Begin by copying the leading unaligned destination. Copy enough
1189 to make the next destination address 32-byte aligned. */
1190 copied = 32 - (dalign + (dpos & 31));
1191 if (copied == 32)
1192 copied = 0;
1193 xincr_first = (copied + 7) & -8;
1194 smask_first = dmask_first = (1ul << copied) - 1;
1195 smask_first <<= salign;
1196 dmask_first <<= dalign + need_prime*8;
1197 if (need_prime && copied > 24)
1198 copied -= 8;
1199 left = width - copied;
1200
1201 /* Care for small copies. */
1202 if (copied > width) {
1203 u32 t;
1204 t = (1ul << width) - 1;
1205 t <<= dalign + need_prime*8;
1206 dmask_first &= t;
1207 left = 0;
1208 }
1209
1210 /* Attempt to use 64-byte copies. This is only possible if the
1211 source and destination are co-aligned at 64 bytes. */
1212 n64 = need_second = 0;
1213 if ((dpos & 63) == (spos & 63)
1214 && (height == 1 || line_length % 64 == 0)) {
1215 /* We may need a 32-byte copy to ensure 64 byte alignment. */
1216 need_second = (dpos + xincr_first) & 63;
1217 if ((need_second & 32) != need_second)
1218 printk(KERN_ERR "tgafb: need_second wrong\n");
1219 if (left >= need_second + 64) {
1220 left -= need_second;
1221 n64 = left / 64;
1222 left %= 64;
1223 } else
1224 need_second = 0;
1225 }
1226
1227 /* Copy trailing full 32-byte sections. This will be the main
1228 loop if the 64 byte loop can't be used. */
1229 n32 = left / 32;
1230 left %= 32;
1231
1232 /* Copy the trailing unaligned destination. */
1233 dmask_last = (1ul << left) - 1;
1234
1235 tga_regs = par->tga_regs_base;
1236 tga_fb = par->tga_fb_base;
1237
1238 /* Set up the MODE and PIXELSHIFT registers. */
1239 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1240 __raw_writel(pixel_shift, tga_regs+TGA_PIXELSHIFT_REG);
1241 wmb();
1242
1243 for (i = 0; i < height; ++i) {
1244 unsigned long j;
1245 void __iomem *sfb;
1246 void __iomem *dfb;
1247
1248 sfb = tga_fb + spos;
1249 dfb = tga_fb + dpos;
1250 if (dmask_first) {
1251 __raw_writel(smask_first, sfb);
1252 wmb();
1253 __raw_writel(dmask_first, dfb);
1254 wmb();
1255 sfb += xincr_first;
1256 dfb += xincr_first;
1257 }
1258
1259 if (need_second) {
1260 __raw_writel(0xffffffff, sfb);
1261 wmb();
1262 __raw_writel(0xffffffff, dfb);
1263 wmb();
1264 sfb += 32;
1265 dfb += 32;
1266 }
1267
1268 if (n64 && (((unsigned long)sfb | (unsigned long)dfb) & 63))
1269 printk(KERN_ERR
1270 "tgafb: misaligned copy64 (s:%p, d:%p)\n",
1271 sfb, dfb);
1272
1273 for (j = 0; j < n64; ++j) {
1274 __raw_writel(sfb - tga_fb, tga_regs+TGA_COPY64_SRC);
1275 wmb();
1276 __raw_writel(dfb - tga_fb, tga_regs+TGA_COPY64_DST);
1277 wmb();
1278 sfb += 64;
1279 dfb += 64;
1280 }
1281
1282 for (j = 0; j < n32; ++j) {
1283 __raw_writel(0xffffffff, sfb);
1284 wmb();
1285 __raw_writel(0xffffffff, dfb);
1286 wmb();
1287 sfb += 32;
1288 dfb += 32;
1289 }
1290
1291 if (dmask_last) {
1292 __raw_writel(0xffffffff, sfb);
1293 wmb();
1294 __raw_writel(dmask_last, dfb);
1295 wmb();
1296 }
1297
1298 spos += yincr;
1299 dpos += yincr;
1300 }
1301
1302 /* Reset the MODE register to normal. */
1303 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1304 }
1305
1306 /* The (almost) general case of backward copy in 8bpp mode. */
1307 static inline void
1308 copyarea_backward_8bpp(struct fb_info *info, u32 dx, u32 dy, u32 sx, u32 sy,
1309 u32 height, u32 width, u32 line_length,
1310 const struct fb_copyarea *area)
1311 {
1312 struct tga_par *par = (struct tga_par *) info->par;
1313 unsigned long i, left, yincr;
1314 unsigned long depos, sepos, dealign, sealign;
1315 u32 mask_first, mask_last;
1316 unsigned long n32;
1317 void __iomem *tga_regs;
1318 void __iomem *tga_fb;
1319
1320 yincr = line_length;
1321 if (dy > sy) {
1322 dy += height - 1;
1323 sy += height - 1;
1324 yincr = -yincr;
1325 }
1326
1327 /* Compute the offsets and alignments in the frame buffer.
1328 More than anything else, these control how we do copies. */
1329 depos = dy * line_length + dx + width;
1330 sepos = sy * line_length + sx + width;
1331 dealign = depos & 7;
1332 sealign = sepos & 7;
1333
1334 /* ??? The documentation appears to be incorrect (or very
1335 misleading) wrt how pixel shifting works in backward copy
1336 mode, i.e. when PIXELSHIFT is negative. I give up for now.
1337 Do handle the common case of co-aligned backward copies,
1338 but frob everything else back on generic code. */
1339 if (dealign != sealign) {
1340 cfb_copyarea(info, area);
1341 return;
1342 }
1343
1344 /* We begin the copy with the trailing pixels of the
1345 unaligned destination. */
1346 mask_first = (1ul << dealign) - 1;
1347 left = width - dealign;
1348
1349 /* Care for small copies. */
1350 if (dealign > width) {
1351 mask_first ^= (1ul << (dealign - width)) - 1;
1352 left = 0;
1353 }
1354
1355 /* Next copy full words at a time. */
1356 n32 = left / 32;
1357 left %= 32;
1358
1359 /* Finally copy the unaligned head of the span. */
1360 mask_last = -1 << (32 - left);
1361
1362 tga_regs = par->tga_regs_base;
1363 tga_fb = par->tga_fb_base;
1364
1365 /* Set up the MODE and PIXELSHIFT registers. */
1366 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_COPY, tga_regs+TGA_MODE_REG);
1367 __raw_writel(0, tga_regs+TGA_PIXELSHIFT_REG);
1368 wmb();
1369
1370 for (i = 0; i < height; ++i) {
1371 unsigned long j;
1372 void __iomem *sfb;
1373 void __iomem *dfb;
1374
1375 sfb = tga_fb + sepos;
1376 dfb = tga_fb + depos;
1377 if (mask_first) {
1378 __raw_writel(mask_first, sfb);
1379 wmb();
1380 __raw_writel(mask_first, dfb);
1381 wmb();
1382 }
1383
1384 for (j = 0; j < n32; ++j) {
1385 sfb -= 32;
1386 dfb -= 32;
1387 __raw_writel(0xffffffff, sfb);
1388 wmb();
1389 __raw_writel(0xffffffff, dfb);
1390 wmb();
1391 }
1392
1393 if (mask_last) {
1394 sfb -= 32;
1395 dfb -= 32;
1396 __raw_writel(mask_last, sfb);
1397 wmb();
1398 __raw_writel(mask_last, dfb);
1399 wmb();
1400 }
1401
1402 sepos += yincr;
1403 depos += yincr;
1404 }
1405
1406 /* Reset the MODE register to normal. */
1407 __raw_writel(TGA_MODE_SBM_8BPP|TGA_MODE_SIMPLE, tga_regs+TGA_MODE_REG);
1408 }
1409
1410 static void
1411 tgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
1412 {
1413 unsigned long dx, dy, width, height, sx, sy, vxres, vyres;
1414 unsigned long line_length, bpp;
1415
1416 dx = area->dx;
1417 dy = area->dy;
1418 width = area->width;
1419 height = area->height;
1420 sx = area->sx;
1421 sy = area->sy;
1422 vxres = info->var.xres_virtual;
1423 vyres = info->var.yres_virtual;
1424 line_length = info->fix.line_length;
1425
1426 /* The top left corners must be in the virtual screen. */
1427 if (dx > vxres || sx > vxres || dy > vyres || sy > vyres)
1428 return;
1429
1430 /* Clip the destination. */
1431 if (dx + width > vxres)
1432 width = vxres - dx;
1433 if (dy + height > vyres)
1434 height = vyres - dy;
1435
1436 /* The source must be completely inside the virtual screen. */
1437 if (sx + width > vxres || sy + height > vyres)
1438 return;
1439
1440 bpp = info->var.bits_per_pixel;
1441
1442 /* Detect copies of the entire line. */
1443 if (width * (bpp >> 3) == line_length) {
1444 if (bpp == 8)
1445 copyarea_line_8bpp(info, dy, sy, height, width);
1446 else
1447 copyarea_line_32bpp(info, dy, sy, height, width);
1448 }
1449
1450 /* ??? The documentation is unclear to me exactly how the pixelshift
1451 register works in 32bpp mode. Since I don't have hardware to test,
1452 give up for now and fall back on the generic routines. */
1453 else if (bpp == 32)
1454 cfb_copyarea(info, area);
1455
1456 /* Detect overlapping source and destination that requires
1457 a backward copy. */
1458 else if (dy == sy && dx > sx && dx < sx + width)
1459 copyarea_backward_8bpp(info, dx, dy, sx, sy, height,
1460 width, line_length, area);
1461 else
1462 copyarea_foreward_8bpp(info, dx, dy, sx, sy, height,
1463 width, line_length);
1464 }
1465
1466
1467 /*
1468 * Initialisation
1469 */
1470
1471 static void
1472 tgafb_init_fix(struct fb_info *info)
1473 {
1474 struct tga_par *par = (struct tga_par *)info->par;
1475 int tga_bus_pci = TGA_BUS_PCI(par->dev);
1476 int tga_bus_tc = TGA_BUS_TC(par->dev);
1477 u8 tga_type = par->tga_type;
1478 const char *tga_type_name = NULL;
1479
1480 switch (tga_type) {
1481 case TGA_TYPE_8PLANE:
1482 if (tga_bus_pci)
1483 tga_type_name = "Digital ZLXp-E1";
1484 if (tga_bus_tc)
1485 tga_type_name = "Digital ZLX-E1";
1486 break;
1487 case TGA_TYPE_24PLANE:
1488 if (tga_bus_pci)
1489 tga_type_name = "Digital ZLXp-E2";
1490 if (tga_bus_tc)
1491 tga_type_name = "Digital ZLX-E2";
1492 break;
1493 case TGA_TYPE_24PLUSZ:
1494 if (tga_bus_pci)
1495 tga_type_name = "Digital ZLXp-E3";
1496 if (tga_bus_tc)
1497 tga_type_name = "Digital ZLX-E3";
1498 break;
1499 default:
1500 tga_type_name = "Unknown";
1501 break;
1502 }
1503
1504 strlcpy(info->fix.id, tga_type_name, sizeof(info->fix.id));
1505
1506 info->fix.type = FB_TYPE_PACKED_PIXELS;
1507 info->fix.type_aux = 0;
1508 info->fix.visual = (tga_type == TGA_TYPE_8PLANE
1509 ? FB_VISUAL_PSEUDOCOLOR
1510 : FB_VISUAL_DIRECTCOLOR);
1511
1512 info->fix.line_length = par->xres * (par->bits_per_pixel >> 3);
1513 info->fix.smem_start = (size_t) par->tga_fb_base;
1514 info->fix.smem_len = info->fix.line_length * par->yres;
1515 info->fix.mmio_start = (size_t) par->tga_regs_base;
1516 info->fix.mmio_len = 512;
1517
1518 info->fix.xpanstep = 0;
1519 info->fix.ypanstep = 0;
1520 info->fix.ywrapstep = 0;
1521
1522 info->fix.accel = FB_ACCEL_DEC_TGA;
1523
1524 /*
1525 * These are needed by fb_set_logo_truepalette(), so we
1526 * set them here for 24-plane cards.
1527 */
1528 if (tga_type != TGA_TYPE_8PLANE) {
1529 info->var.red.length = 8;
1530 info->var.green.length = 8;
1531 info->var.blue.length = 8;
1532 info->var.red.offset = 16;
1533 info->var.green.offset = 8;
1534 info->var.blue.offset = 0;
1535 }
1536 }
1537
1538 static int tgafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
1539 {
1540 /* We just use this to catch switches out of graphics mode. */
1541 tgafb_set_par(info); /* A bit of overkill for BASE_ADDR reset. */
1542 return 0;
1543 }
1544
1545 static int tgafb_register(struct device *dev)
1546 {
1547 static const struct fb_videomode modedb_tc = {
1548 /* 1280x1024 @ 72 Hz, 76.8 kHz hsync */
1549 "1280x1024@72", 0, 1280, 1024, 7645, 224, 28, 33, 3, 160, 3,
1550 FB_SYNC_ON_GREEN, FB_VMODE_NONINTERLACED
1551 };
1552
1553 static unsigned int const fb_offset_presets[4] = {
1554 TGA_8PLANE_FB_OFFSET,
1555 TGA_24PLANE_FB_OFFSET,
1556 0xffffffff,
1557 TGA_24PLUSZ_FB_OFFSET
1558 };
1559
1560 const struct fb_videomode *modedb_tga = NULL;
1561 resource_size_t bar0_start = 0, bar0_len = 0;
1562 const char *mode_option_tga = NULL;
1563 int tga_bus_pci = TGA_BUS_PCI(dev);
1564 int tga_bus_tc = TGA_BUS_TC(dev);
1565 unsigned int modedbsize_tga = 0;
1566 void __iomem *mem_base;
1567 struct fb_info *info;
1568 struct tga_par *par;
1569 u8 tga_type;
1570 int ret = 0;
1571
1572 /* Enable device in PCI config. */
1573 if (tga_bus_pci && pci_enable_device(to_pci_dev(dev))) {
1574 printk(KERN_ERR "tgafb: Cannot enable PCI device\n");
1575 return -ENODEV;
1576 }
1577
1578 /* Allocate the fb and par structures. */
1579 info = framebuffer_alloc(sizeof(struct tga_par), dev);
1580 if (!info) {
1581 printk(KERN_ERR "tgafb: Cannot allocate memory\n");
1582 return -ENOMEM;
1583 }
1584
1585 par = info->par;
1586 dev_set_drvdata(dev, info);
1587
1588 /* Request the mem regions. */
1589 ret = -ENODEV;
1590 if (tga_bus_pci) {
1591 bar0_start = pci_resource_start(to_pci_dev(dev), 0);
1592 bar0_len = pci_resource_len(to_pci_dev(dev), 0);
1593 }
1594 if (tga_bus_tc) {
1595 bar0_start = to_tc_dev(dev)->resource.start;
1596 bar0_len = to_tc_dev(dev)->resource.end - bar0_start + 1;
1597 }
1598 if (!request_mem_region (bar0_start, bar0_len, "tgafb")) {
1599 printk(KERN_ERR "tgafb: cannot reserve FB region\n");
1600 goto err0;
1601 }
1602
1603 /* Map the framebuffer. */
1604 mem_base = ioremap_nocache(bar0_start, bar0_len);
1605 if (!mem_base) {
1606 printk(KERN_ERR "tgafb: Cannot map MMIO\n");
1607 goto err1;
1608 }
1609
1610 /* Grab info about the card. */
1611 tga_type = (readl(mem_base) >> 12) & 0x0f;
1612 par->dev = dev;
1613 par->tga_mem_base = mem_base;
1614 par->tga_fb_base = mem_base + fb_offset_presets[tga_type];
1615 par->tga_regs_base = mem_base + TGA_REGS_OFFSET;
1616 par->tga_type = tga_type;
1617 if (tga_bus_pci)
1618 par->tga_chip_rev = (to_pci_dev(dev))->revision;
1619 if (tga_bus_tc)
1620 par->tga_chip_rev = TGA_READ_REG(par, TGA_START_REG) & 0xff;
1621
1622 /* Setup framebuffer. */
1623 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
1624 FBINFO_HWACCEL_IMAGEBLIT | FBINFO_HWACCEL_FILLRECT;
1625 info->fbops = &tgafb_ops;
1626 info->screen_base = par->tga_fb_base;
1627 info->pseudo_palette = par->palette;
1628
1629 /* This should give a reasonable default video mode. */
1630 if (tga_bus_pci) {
1631 mode_option_tga = mode_option_pci;
1632 }
1633 if (tga_bus_tc) {
1634 mode_option_tga = mode_option_tc;
1635 modedb_tga = &modedb_tc;
1636 modedbsize_tga = 1;
1637 }
1638 ret = fb_find_mode(&info->var, info,
1639 mode_option ? mode_option : mode_option_tga,
1640 modedb_tga, modedbsize_tga, NULL,
1641 tga_type == TGA_TYPE_8PLANE ? 8 : 32);
1642 if (ret == 0 || ret == 4) {
1643 printk(KERN_ERR "tgafb: Could not find valid video mode\n");
1644 ret = -EINVAL;
1645 goto err1;
1646 }
1647
1648 if (fb_alloc_cmap(&info->cmap, 256, 0)) {
1649 printk(KERN_ERR "tgafb: Could not allocate color map\n");
1650 ret = -ENOMEM;
1651 goto err1;
1652 }
1653
1654 tgafb_set_par(info);
1655 tgafb_init_fix(info);
1656
1657 if (register_framebuffer(info) < 0) {
1658 printk(KERN_ERR "tgafb: Could not register framebuffer\n");
1659 ret = -EINVAL;
1660 goto err2;
1661 }
1662
1663 if (tga_bus_pci) {
1664 pr_info("tgafb: DC21030 [TGA] detected, rev=0x%02x\n",
1665 par->tga_chip_rev);
1666 pr_info("tgafb: at PCI bus %d, device %d, function %d\n",
1667 to_pci_dev(dev)->bus->number,
1668 PCI_SLOT(to_pci_dev(dev)->devfn),
1669 PCI_FUNC(to_pci_dev(dev)->devfn));
1670 }
1671 if (tga_bus_tc)
1672 pr_info("tgafb: SFB+ detected, rev=0x%02x\n",
1673 par->tga_chip_rev);
1674 pr_info("fb%d: %s frame buffer device at 0x%lx\n",
1675 info->node, info->fix.id, (long)bar0_start);
1676
1677 return 0;
1678
1679 err2:
1680 fb_dealloc_cmap(&info->cmap);
1681 err1:
1682 if (mem_base)
1683 iounmap(mem_base);
1684 release_mem_region(bar0_start, bar0_len);
1685 err0:
1686 framebuffer_release(info);
1687 return ret;
1688 }
1689
1690 static void tgafb_unregister(struct device *dev)
1691 {
1692 resource_size_t bar0_start = 0, bar0_len = 0;
1693 int tga_bus_pci = TGA_BUS_PCI(dev);
1694 int tga_bus_tc = TGA_BUS_TC(dev);
1695 struct fb_info *info = NULL;
1696 struct tga_par *par;
1697
1698 info = dev_get_drvdata(dev);
1699 if (!info)
1700 return;
1701
1702 par = info->par;
1703 unregister_framebuffer(info);
1704 fb_dealloc_cmap(&info->cmap);
1705 iounmap(par->tga_mem_base);
1706 if (tga_bus_pci) {
1707 bar0_start = pci_resource_start(to_pci_dev(dev), 0);
1708 bar0_len = pci_resource_len(to_pci_dev(dev), 0);
1709 }
1710 if (tga_bus_tc) {
1711 bar0_start = to_tc_dev(dev)->resource.start;
1712 bar0_len = to_tc_dev(dev)->resource.end - bar0_start + 1;
1713 }
1714 release_mem_region(bar0_start, bar0_len);
1715 framebuffer_release(info);
1716 }
1717
1718 static void tgafb_exit(void)
1719 {
1720 tc_unregister_driver(&tgafb_tc_driver);
1721 pci_unregister_driver(&tgafb_pci_driver);
1722 }
1723
1724 #ifndef MODULE
1725 static int tgafb_setup(char *arg)
1726 {
1727 char *this_opt;
1728
1729 if (arg && *arg) {
1730 while ((this_opt = strsep(&arg, ","))) {
1731 if (!*this_opt)
1732 continue;
1733 if (!strncmp(this_opt, "mode:", 5))
1734 mode_option = this_opt+5;
1735 else
1736 printk(KERN_ERR
1737 "tgafb: unknown parameter %s\n",
1738 this_opt);
1739 }
1740 }
1741
1742 return 0;
1743 }
1744 #endif /* !MODULE */
1745
1746 static int tgafb_init(void)
1747 {
1748 int status;
1749 #ifndef MODULE
1750 char *option = NULL;
1751
1752 if (fb_get_options("tgafb", &option))
1753 return -ENODEV;
1754 tgafb_setup(option);
1755 #endif
1756 status = pci_register_driver(&tgafb_pci_driver);
1757 if (!status)
1758 status = tc_register_driver(&tgafb_tc_driver);
1759 return status;
1760 }
1761
1762 /*
1763 * Modularisation
1764 */
1765
1766 module_init(tgafb_init);
1767 module_exit(tgafb_exit);
1768
1769 MODULE_DESCRIPTION("Framebuffer driver for TGA/SFB+ chipset");
1770 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree