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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
4 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
5
6 */
7#include <linux/via-core.h>
8#include "global.h"
9
10/*
11 * Figure out an appropriate bytes-per-pixel setting.
12 */
13static int viafb_set_bpp(void __iomem *engine, u8 bpp)
14{
15 u32 gemode;
16
17 /* Preserve the reserved bits */
18 /* Lowest 2 bits to zero gives us no rotation */
19 gemode = readl(engine + VIA_REG_GEMODE) & 0xfffffcfc;
20 switch (bpp) {
21 case 8:
22 gemode |= VIA_GEM_8bpp;
23 break;
24 case 16:
25 gemode |= VIA_GEM_16bpp;
26 break;
27 case 32:
28 gemode |= VIA_GEM_32bpp;
29 break;
30 default:
31 printk(KERN_WARNING "viafb_set_bpp: Unsupported bpp %d\n", bpp);
32 return -EINVAL;
33 }
34 writel(gemode, engine + VIA_REG_GEMODE);
35 return 0;
36}
37
38
39static int hw_bitblt_1(void __iomem *engine, u8 op, u32 width, u32 height,
40 u8 dst_bpp, u32 dst_addr, u32 dst_pitch, u32 dst_x, u32 dst_y,
41 u32 *src_mem, u32 src_addr, u32 src_pitch, u32 src_x, u32 src_y,
42 u32 fg_color, u32 bg_color, u8 fill_rop)
43{
44 u32 ge_cmd = 0, tmp, i;
45 int ret;
46
47 if (!op || op > 3) {
48 printk(KERN_WARNING "hw_bitblt_1: Invalid operation: %d\n", op);
49 return -EINVAL;
50 }
51
52 if (op != VIA_BITBLT_FILL && !src_mem && src_addr == dst_addr) {
53 if (src_x < dst_x) {
54 ge_cmd |= 0x00008000;
55 src_x += width - 1;
56 dst_x += width - 1;
57 }
58 if (src_y < dst_y) {
59 ge_cmd |= 0x00004000;
60 src_y += height - 1;
61 dst_y += height - 1;
62 }
63 }
64
65 if (op == VIA_BITBLT_FILL) {
66 switch (fill_rop) {
67 case 0x00: /* blackness */
68 case 0x5A: /* pattern inversion */
69 case 0xF0: /* pattern copy */
70 case 0xFF: /* whiteness */
71 break;
72 default:
73 printk(KERN_WARNING "hw_bitblt_1: Invalid fill rop: "
74 "%u\n", fill_rop);
75 return -EINVAL;
76 }
77 }
78
79 ret = viafb_set_bpp(engine, dst_bpp);
80 if (ret)
81 return ret;
82
83 if (op != VIA_BITBLT_FILL) {
84 if (src_x & (op == VIA_BITBLT_MONO ? 0xFFFF8000 : 0xFFFFF000)
85 || src_y & 0xFFFFF000) {
86 printk(KERN_WARNING "hw_bitblt_1: Unsupported source "
87 "x/y %d %d\n", src_x, src_y);
88 return -EINVAL;
89 }
90 tmp = src_x | (src_y << 16);
91 writel(tmp, engine + 0x08);
92 }
93
94 if (dst_x & 0xFFFFF000 || dst_y & 0xFFFFF000) {
95 printk(KERN_WARNING "hw_bitblt_1: Unsupported destination x/y "
96 "%d %d\n", dst_x, dst_y);
97 return -EINVAL;
98 }
99 tmp = dst_x | (dst_y << 16);
100 writel(tmp, engine + 0x0C);
101
102 if ((width - 1) & 0xFFFFF000 || (height - 1) & 0xFFFFF000) {
103 printk(KERN_WARNING "hw_bitblt_1: Unsupported width/height "
104 "%d %d\n", width, height);
105 return -EINVAL;
106 }
107 tmp = (width - 1) | ((height - 1) << 16);
108 writel(tmp, engine + 0x10);
109
110 if (op != VIA_BITBLT_COLOR)
111 writel(fg_color, engine + 0x18);
112
113 if (op == VIA_BITBLT_MONO)
114 writel(bg_color, engine + 0x1C);
115
116 if (op != VIA_BITBLT_FILL) {
117 tmp = src_mem ? 0 : src_addr;
118 if (tmp & 0xE0000007) {
119 printk(KERN_WARNING "hw_bitblt_1: Unsupported source "
120 "address %X\n", tmp);
121 return -EINVAL;
122 }
123 tmp >>= 3;
124 writel(tmp, engine + 0x30);
125 }
126
127 if (dst_addr & 0xE0000007) {
128 printk(KERN_WARNING "hw_bitblt_1: Unsupported destination "
129 "address %X\n", dst_addr);
130 return -EINVAL;
131 }
132 tmp = dst_addr >> 3;
133 writel(tmp, engine + 0x34);
134
135 if (op == VIA_BITBLT_FILL)
136 tmp = 0;
137 else
138 tmp = src_pitch;
139 if (tmp & 0xFFFFC007 || dst_pitch & 0xFFFFC007) {
140 printk(KERN_WARNING "hw_bitblt_1: Unsupported pitch %X %X\n",
141 tmp, dst_pitch);
142 return -EINVAL;
143 }
144 tmp = VIA_PITCH_ENABLE | (tmp >> 3) | (dst_pitch << (16 - 3));
145 writel(tmp, engine + 0x38);
146
147 if (op == VIA_BITBLT_FILL)
148 ge_cmd |= fill_rop << 24 | 0x00002000 | 0x00000001;
149 else {
150 ge_cmd |= 0xCC000000; /* ROP=SRCCOPY */
151 if (src_mem)
152 ge_cmd |= 0x00000040;
153 if (op == VIA_BITBLT_MONO)
154 ge_cmd |= 0x00000002 | 0x00000100 | 0x00020000;
155 else
156 ge_cmd |= 0x00000001;
157 }
158 writel(ge_cmd, engine);
159
160 if (op == VIA_BITBLT_FILL || !src_mem)
161 return 0;
162
163 tmp = (width * height * (op == VIA_BITBLT_MONO ? 1 : (dst_bpp >> 3)) +
164 3) >> 2;
165
166 for (i = 0; i < tmp; i++)
167 writel(src_mem[i], engine + VIA_MMIO_BLTBASE);
168
169 return 0;
170}
171
172static int hw_bitblt_2(void __iomem *engine, u8 op, u32 width, u32 height,
173 u8 dst_bpp, u32 dst_addr, u32 dst_pitch, u32 dst_x, u32 dst_y,
174 u32 *src_mem, u32 src_addr, u32 src_pitch, u32 src_x, u32 src_y,
175 u32 fg_color, u32 bg_color, u8 fill_rop)
176{
177 u32 ge_cmd = 0, tmp, i;
178 int ret;
179
180 if (!op || op > 3) {
181 printk(KERN_WARNING "hw_bitblt_2: Invalid operation: %d\n", op);
182 return -EINVAL;
183 }
184
185 if (op != VIA_BITBLT_FILL && !src_mem && src_addr == dst_addr) {
186 if (src_x < dst_x) {
187 ge_cmd |= 0x00008000;
188 src_x += width - 1;
189 dst_x += width - 1;
190 }
191 if (src_y < dst_y) {
192 ge_cmd |= 0x00004000;
193 src_y += height - 1;
194 dst_y += height - 1;
195 }
196 }
197
198 if (op == VIA_BITBLT_FILL) {
199 switch (fill_rop) {
200 case 0x00: /* blackness */
201 case 0x5A: /* pattern inversion */
202 case 0xF0: /* pattern copy */
203 case 0xFF: /* whiteness */
204 break;
205 default:
206 printk(KERN_WARNING "hw_bitblt_2: Invalid fill rop: "
207 "%u\n", fill_rop);
208 return -EINVAL;
209 }
210 }
211
212 ret = viafb_set_bpp(engine, dst_bpp);
213 if (ret)
214 return ret;
215
216 if (op == VIA_BITBLT_FILL)
217 tmp = 0;
218 else
219 tmp = src_pitch;
220 if (tmp & 0xFFFFC007 || dst_pitch & 0xFFFFC007) {
221 printk(KERN_WARNING "hw_bitblt_2: Unsupported pitch %X %X\n",
222 tmp, dst_pitch);
223 return -EINVAL;
224 }
225 tmp = (tmp >> 3) | (dst_pitch << (16 - 3));
226 writel(tmp, engine + 0x08);
227
228 if ((width - 1) & 0xFFFFF000 || (height - 1) & 0xFFFFF000) {
229 printk(KERN_WARNING "hw_bitblt_2: Unsupported width/height "
230 "%d %d\n", width, height);
231 return -EINVAL;
232 }
233 tmp = (width - 1) | ((height - 1) << 16);
234 writel(tmp, engine + 0x0C);
235
236 if (dst_x & 0xFFFFF000 || dst_y & 0xFFFFF000) {
237 printk(KERN_WARNING "hw_bitblt_2: Unsupported destination x/y "
238 "%d %d\n", dst_x, dst_y);
239 return -EINVAL;
240 }
241 tmp = dst_x | (dst_y << 16);
242 writel(tmp, engine + 0x10);
243
244 if (dst_addr & 0xE0000007) {
245 printk(KERN_WARNING "hw_bitblt_2: Unsupported destination "
246 "address %X\n", dst_addr);
247 return -EINVAL;
248 }
249 tmp = dst_addr >> 3;
250 writel(tmp, engine + 0x14);
251
252 if (op != VIA_BITBLT_FILL) {
253 if (src_x & (op == VIA_BITBLT_MONO ? 0xFFFF8000 : 0xFFFFF000)
254 || src_y & 0xFFFFF000) {
255 printk(KERN_WARNING "hw_bitblt_2: Unsupported source "
256 "x/y %d %d\n", src_x, src_y);
257 return -EINVAL;
258 }
259 tmp = src_x | (src_y << 16);
260 writel(tmp, engine + 0x18);
261
262 tmp = src_mem ? 0 : src_addr;
263 if (tmp & 0xE0000007) {
264 printk(KERN_WARNING "hw_bitblt_2: Unsupported source "
265 "address %X\n", tmp);
266 return -EINVAL;
267 }
268 tmp >>= 3;
269 writel(tmp, engine + 0x1C);
270 }
271
272 if (op == VIA_BITBLT_FILL) {
273 writel(fg_color, engine + 0x58);
274 } else if (op == VIA_BITBLT_MONO) {
275 writel(fg_color, engine + 0x4C);
276 writel(bg_color, engine + 0x50);
277 }
278
279 if (op == VIA_BITBLT_FILL)
280 ge_cmd |= fill_rop << 24 | 0x00002000 | 0x00000001;
281 else {
282 ge_cmd |= 0xCC000000; /* ROP=SRCCOPY */
283 if (src_mem)
284 ge_cmd |= 0x00000040;
285 if (op == VIA_BITBLT_MONO)
286 ge_cmd |= 0x00000002 | 0x00000100 | 0x00020000;
287 else
288 ge_cmd |= 0x00000001;
289 }
290 writel(ge_cmd, engine);
291
292 if (op == VIA_BITBLT_FILL || !src_mem)
293 return 0;
294
295 tmp = (width * height * (op == VIA_BITBLT_MONO ? 1 : (dst_bpp >> 3)) +
296 3) >> 2;
297
298 for (i = 0; i < tmp; i++)
299 writel(src_mem[i], engine + VIA_MMIO_BLTBASE);
300
301 return 0;
302}
303
304int viafb_setup_engine(struct fb_info *info)
305{
306 struct viafb_par *viapar = info->par;
307 void __iomem *engine;
308 u32 chip_name = viapar->shared->chip_info.gfx_chip_name;
309
310 engine = viapar->shared->vdev->engine_mmio;
311 if (!engine) {
312 printk(KERN_WARNING "viafb_init_accel: ioremap failed, "
313 "hardware acceleration disabled\n");
314 return -ENOMEM;
315 }
316
317 switch (chip_name) {
318 case UNICHROME_CLE266:
319 case UNICHROME_K400:
320 case UNICHROME_K800:
321 case UNICHROME_PM800:
322 case UNICHROME_CN700:
323 case UNICHROME_CX700:
324 case UNICHROME_CN750:
325 case UNICHROME_K8M890:
326 case UNICHROME_P4M890:
327 case UNICHROME_P4M900:
328 viapar->shared->hw_bitblt = hw_bitblt_1;
329 break;
330 case UNICHROME_VX800:
331 case UNICHROME_VX855:
332 case UNICHROME_VX900:
333 viapar->shared->hw_bitblt = hw_bitblt_2;
334 break;
335 default:
336 viapar->shared->hw_bitblt = NULL;
337 }
338
339 viapar->fbmem_free -= CURSOR_SIZE;
340 viapar->shared->cursor_vram_addr = viapar->fbmem_free;
341 viapar->fbmem_used += CURSOR_SIZE;
342
343 viapar->fbmem_free -= VQ_SIZE;
344 viapar->shared->vq_vram_addr = viapar->fbmem_free;
345 viapar->fbmem_used += VQ_SIZE;
346
347#if IS_ENABLED(CONFIG_VIDEO_VIA_CAMERA)
348 /*
349 * Set aside a chunk of framebuffer memory for the camera
350 * driver. Someday this driver probably needs a proper allocator
351 * for fbmem; for now, we just have to do this before the
352 * framebuffer initializes itself.
353 *
354 * As for the size: the engine can handle three frames,
355 * 16 bits deep, up to VGA resolution.
356 */
357 viapar->shared->vdev->camera_fbmem_size = 3*VGA_HEIGHT*VGA_WIDTH*2;
358 viapar->fbmem_free -= viapar->shared->vdev->camera_fbmem_size;
359 viapar->fbmem_used += viapar->shared->vdev->camera_fbmem_size;
360 viapar->shared->vdev->camera_fbmem_offset = viapar->fbmem_free;
361#endif
362
363 viafb_reset_engine(viapar);
364 return 0;
365}
366
367void viafb_reset_engine(struct viafb_par *viapar)
368{
369 void __iomem *engine = viapar->shared->vdev->engine_mmio;
370 int highest_reg, i;
371 u32 vq_start_addr, vq_end_addr, vq_start_low, vq_end_low, vq_high,
372 vq_len, chip_name = viapar->shared->chip_info.gfx_chip_name;
373
374 /* Initialize registers to reset the 2D engine */
375 switch (viapar->shared->chip_info.twod_engine) {
376 case VIA_2D_ENG_M1:
377 highest_reg = 0x5c;
378 break;
379 default:
380 highest_reg = 0x40;
381 break;
382 }
383 for (i = 0; i <= highest_reg; i += 4)
384 writel(0x0, engine + i);
385
386 /* Init AGP and VQ regs */
387 switch (chip_name) {
388 case UNICHROME_K8M890:
389 case UNICHROME_P4M900:
390 case UNICHROME_VX800:
391 case UNICHROME_VX855:
392 case UNICHROME_VX900:
393 writel(0x00100000, engine + VIA_REG_CR_TRANSET);
394 writel(0x680A0000, engine + VIA_REG_CR_TRANSPACE);
395 writel(0x02000000, engine + VIA_REG_CR_TRANSPACE);
396 break;
397
398 default:
399 writel(0x00100000, engine + VIA_REG_TRANSET);
400 writel(0x00000000, engine + VIA_REG_TRANSPACE);
401 writel(0x00333004, engine + VIA_REG_TRANSPACE);
402 writel(0x60000000, engine + VIA_REG_TRANSPACE);
403 writel(0x61000000, engine + VIA_REG_TRANSPACE);
404 writel(0x62000000, engine + VIA_REG_TRANSPACE);
405 writel(0x63000000, engine + VIA_REG_TRANSPACE);
406 writel(0x64000000, engine + VIA_REG_TRANSPACE);
407 writel(0x7D000000, engine + VIA_REG_TRANSPACE);
408
409 writel(0xFE020000, engine + VIA_REG_TRANSET);
410 writel(0x00000000, engine + VIA_REG_TRANSPACE);
411 break;
412 }
413
414 /* Enable VQ */
415 vq_start_addr = viapar->shared->vq_vram_addr;
416 vq_end_addr = viapar->shared->vq_vram_addr + VQ_SIZE - 1;
417
418 vq_start_low = 0x50000000 | (vq_start_addr & 0xFFFFFF);
419 vq_end_low = 0x51000000 | (vq_end_addr & 0xFFFFFF);
420 vq_high = 0x52000000 | ((vq_start_addr & 0xFF000000) >> 24) |
421 ((vq_end_addr & 0xFF000000) >> 16);
422 vq_len = 0x53000000 | (VQ_SIZE >> 3);
423
424 switch (chip_name) {
425 case UNICHROME_K8M890:
426 case UNICHROME_P4M900:
427 case UNICHROME_VX800:
428 case UNICHROME_VX855:
429 case UNICHROME_VX900:
430 vq_start_low |= 0x20000000;
431 vq_end_low |= 0x20000000;
432 vq_high |= 0x20000000;
433 vq_len |= 0x20000000;
434
435 writel(0x00100000, engine + VIA_REG_CR_TRANSET);
436 writel(vq_high, engine + VIA_REG_CR_TRANSPACE);
437 writel(vq_start_low, engine + VIA_REG_CR_TRANSPACE);
438 writel(vq_end_low, engine + VIA_REG_CR_TRANSPACE);
439 writel(vq_len, engine + VIA_REG_CR_TRANSPACE);
440 writel(0x74301001, engine + VIA_REG_CR_TRANSPACE);
441 writel(0x00000000, engine + VIA_REG_CR_TRANSPACE);
442 break;
443 default:
444 writel(0x00FE0000, engine + VIA_REG_TRANSET);
445 writel(0x080003FE, engine + VIA_REG_TRANSPACE);
446 writel(0x0A00027C, engine + VIA_REG_TRANSPACE);
447 writel(0x0B000260, engine + VIA_REG_TRANSPACE);
448 writel(0x0C000274, engine + VIA_REG_TRANSPACE);
449 writel(0x0D000264, engine + VIA_REG_TRANSPACE);
450 writel(0x0E000000, engine + VIA_REG_TRANSPACE);
451 writel(0x0F000020, engine + VIA_REG_TRANSPACE);
452 writel(0x1000027E, engine + VIA_REG_TRANSPACE);
453 writel(0x110002FE, engine + VIA_REG_TRANSPACE);
454 writel(0x200F0060, engine + VIA_REG_TRANSPACE);
455
456 writel(0x00000006, engine + VIA_REG_TRANSPACE);
457 writel(0x40008C0F, engine + VIA_REG_TRANSPACE);
458 writel(0x44000000, engine + VIA_REG_TRANSPACE);
459 writel(0x45080C04, engine + VIA_REG_TRANSPACE);
460 writel(0x46800408, engine + VIA_REG_TRANSPACE);
461
462 writel(vq_high, engine + VIA_REG_TRANSPACE);
463 writel(vq_start_low, engine + VIA_REG_TRANSPACE);
464 writel(vq_end_low, engine + VIA_REG_TRANSPACE);
465 writel(vq_len, engine + VIA_REG_TRANSPACE);
466 break;
467 }
468
469 /* Set Cursor Image Base Address */
470 writel(viapar->shared->cursor_vram_addr, engine + VIA_REG_CURSOR_MODE);
471 writel(0x0, engine + VIA_REG_CURSOR_POS);
472 writel(0x0, engine + VIA_REG_CURSOR_ORG);
473 writel(0x0, engine + VIA_REG_CURSOR_BG);
474 writel(0x0, engine + VIA_REG_CURSOR_FG);
475 return;
476}
477
478void viafb_show_hw_cursor(struct fb_info *info, int Status)
479{
480 struct viafb_par *viapar = info->par;
481 u32 temp, iga_path = viapar->iga_path;
482
483 temp = readl(viapar->shared->vdev->engine_mmio + VIA_REG_CURSOR_MODE);
484 switch (Status) {
485 case HW_Cursor_ON:
486 temp |= 0x1;
487 break;
488 case HW_Cursor_OFF:
489 temp &= 0xFFFFFFFE;
490 break;
491 }
492 switch (iga_path) {
493 case IGA2:
494 temp |= 0x80000000;
495 break;
496 case IGA1:
497 default:
498 temp &= 0x7FFFFFFF;
499 }
500 writel(temp, viapar->shared->vdev->engine_mmio + VIA_REG_CURSOR_MODE);
501}
502
503void viafb_wait_engine_idle(struct fb_info *info)
504{
505 struct viafb_par *viapar = info->par;
506 int loop = 0;
507 u32 mask;
508 void __iomem *engine = viapar->shared->vdev->engine_mmio;
509
510 switch (viapar->shared->chip_info.twod_engine) {
511 case VIA_2D_ENG_H5:
512 case VIA_2D_ENG_M1:
513 mask = VIA_CMD_RGTR_BUSY_M1 | VIA_2D_ENG_BUSY_M1 |
514 VIA_3D_ENG_BUSY_M1;
515 break;
516 default:
517 while (!(readl(engine + VIA_REG_STATUS) &
518 VIA_VR_QUEUE_BUSY) && (loop < MAXLOOP)) {
519 loop++;
520 cpu_relax();
521 }
522 mask = VIA_CMD_RGTR_BUSY | VIA_2D_ENG_BUSY | VIA_3D_ENG_BUSY;
523 break;
524 }
525
526 while ((readl(engine + VIA_REG_STATUS) & mask) && (loop < MAXLOOP)) {
527 loop++;
528 cpu_relax();
529 }
530
531 if (loop >= MAXLOOP)
532 printk(KERN_ERR "viafb_wait_engine_idle: not syncing\n");
533}