Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
// SPDX-License-Identifier: GPL-2.0

/*
 *  ATI Mach64 Hardware Acceleration
 */

#include <linux/delay.h>
#include <asm/unaligned.h>
#include <linux/fb.h>
#include <video/mach64.h>
#include "atyfb.h"

    /*
     *  Generic Mach64 routines
     */

/* this is for DMA GUI engine! work in progress */
typedef struct {
	u32 frame_buf_offset;
	u32 system_mem_addr;
	u32 command;
	u32 reserved;
} BM_DESCRIPTOR_ENTRY;

#define LAST_DESCRIPTOR (1 << 31)
#define SYSTEM_TO_FRAME_BUFFER 0

static u32 rotation24bpp(u32 dx, u32 direction)
{
	u32 rotation;
	if (direction & DST_X_LEFT_TO_RIGHT) {
		rotation = (dx / 4) % 6;
	} else {
		rotation = ((dx + 2) / 4) % 6;
	}

	return ((rotation << 8) | DST_24_ROTATION_ENABLE);
}

void aty_reset_engine(struct atyfb_par *par)
{
	/* reset engine */
	aty_st_le32(GEN_TEST_CNTL,
		aty_ld_le32(GEN_TEST_CNTL, par) &
		~(GUI_ENGINE_ENABLE | HWCURSOR_ENABLE), par);
	/* enable engine */
	aty_st_le32(GEN_TEST_CNTL,
		aty_ld_le32(GEN_TEST_CNTL, par) | GUI_ENGINE_ENABLE, par);
	/* ensure engine is not locked up by clearing any FIFO or */
	/* HOST errors */
	aty_st_le32(BUS_CNTL,
		aty_ld_le32(BUS_CNTL, par) | BUS_HOST_ERR_ACK | BUS_FIFO_ERR_ACK, par);

	par->fifo_space = 0;
}

static void reset_GTC_3D_engine(const struct atyfb_par *par)
{
	aty_st_le32(SCALE_3D_CNTL, 0xc0, par);
	mdelay(GTC_3D_RESET_DELAY);
	aty_st_le32(SETUP_CNTL, 0x00, par);
	mdelay(GTC_3D_RESET_DELAY);
	aty_st_le32(SCALE_3D_CNTL, 0x00, par);
	mdelay(GTC_3D_RESET_DELAY);
}

void aty_init_engine(struct atyfb_par *par, struct fb_info *info)
{
	u32 pitch_value;
	u32 vxres;

	/* determine modal information from global mode structure */
	pitch_value = info->fix.line_length / (info->var.bits_per_pixel / 8);
	vxres = info->var.xres_virtual;

	if (info->var.bits_per_pixel == 24) {
		/* In 24 bpp, the engine is in 8 bpp - this requires that all */
		/* horizontal coordinates and widths must be adjusted */
		pitch_value *= 3;
		vxres *= 3;
	}

	/* On GTC (RagePro), we need to reset the 3D engine before */
	if (M64_HAS(RESET_3D))
		reset_GTC_3D_engine(par);

	/* Reset engine, enable, and clear any engine errors */
	aty_reset_engine(par);
	/* Ensure that vga page pointers are set to zero - the upper */
	/* page pointers are set to 1 to handle overflows in the */
	/* lower page */
	aty_st_le32(MEM_VGA_WP_SEL, 0x00010000, par);
	aty_st_le32(MEM_VGA_RP_SEL, 0x00010000, par);

	/* ---- Setup standard engine context ---- */

	/* All GUI registers here are FIFOed - therefore, wait for */
	/* the appropriate number of empty FIFO entries */
	wait_for_fifo(14, par);

	/* enable all registers to be loaded for context loads */
	aty_st_le32(CONTEXT_MASK, 0xFFFFFFFF, par);

	/* set destination pitch to modal pitch, set offset to zero */
	aty_st_le32(DST_OFF_PITCH, (pitch_value / 8) << 22, par);

	/* zero these registers (set them to a known state) */
	aty_st_le32(DST_Y_X, 0, par);
	aty_st_le32(DST_HEIGHT, 0, par);
	aty_st_le32(DST_BRES_ERR, 0, par);
	aty_st_le32(DST_BRES_INC, 0, par);
	aty_st_le32(DST_BRES_DEC, 0, par);

	/* set destination drawing attributes */
	aty_st_le32(DST_CNTL, DST_LAST_PEL | DST_Y_TOP_TO_BOTTOM |
		    DST_X_LEFT_TO_RIGHT, par);

	/* set source pitch to modal pitch, set offset to zero */
	aty_st_le32(SRC_OFF_PITCH, (pitch_value / 8) << 22, par);

	/* set these registers to a known state */
	aty_st_le32(SRC_Y_X, 0, par);
	aty_st_le32(SRC_HEIGHT1_WIDTH1, 1, par);
	aty_st_le32(SRC_Y_X_START, 0, par);
	aty_st_le32(SRC_HEIGHT2_WIDTH2, 1, par);

	/* set source pixel retrieving attributes */
	aty_st_le32(SRC_CNTL, SRC_LINE_X_LEFT_TO_RIGHT, par);

	/* set host attributes */
	wait_for_fifo(13, par);
	aty_st_le32(HOST_CNTL, HOST_BYTE_ALIGN, par);

	/* set pattern attributes */
	aty_st_le32(PAT_REG0, 0, par);
	aty_st_le32(PAT_REG1, 0, par);
	aty_st_le32(PAT_CNTL, 0, par);

	/* set scissors to modal size */
	aty_st_le32(SC_LEFT, 0, par);
	aty_st_le32(SC_TOP, 0, par);
	aty_st_le32(SC_BOTTOM, par->crtc.vyres - 1, par);
	aty_st_le32(SC_RIGHT, vxres - 1, par);

	/* set background color to minimum value (usually BLACK) */
	aty_st_le32(DP_BKGD_CLR, 0, par);

	/* set foreground color to maximum value (usually WHITE) */
	aty_st_le32(DP_FRGD_CLR, 0xFFFFFFFF, par);

	/* set write mask to effect all pixel bits */
	aty_st_le32(DP_WRITE_MASK, 0xFFFFFFFF, par);

	/* set foreground mix to overpaint and background mix to */
	/* no-effect */
	aty_st_le32(DP_MIX, FRGD_MIX_S | BKGD_MIX_D, par);

	/* set primary source pixel channel to foreground color */
	/* register */
	aty_st_le32(DP_SRC, FRGD_SRC_FRGD_CLR, par);

	/* set compare functionality to false (no-effect on */
	/* destination) */
	wait_for_fifo(3, par);
	aty_st_le32(CLR_CMP_CLR, 0, par);
	aty_st_le32(CLR_CMP_MASK, 0xFFFFFFFF, par);
	aty_st_le32(CLR_CMP_CNTL, 0, par);

	/* set pixel depth */
	wait_for_fifo(2, par);
	aty_st_le32(DP_PIX_WIDTH, par->crtc.dp_pix_width, par);
	aty_st_le32(DP_CHAIN_MASK, par->crtc.dp_chain_mask, par);

	wait_for_fifo(5, par);
 	aty_st_le32(SCALE_3D_CNTL, 0, par);
	aty_st_le32(Z_CNTL, 0, par);
	aty_st_le32(CRTC_INT_CNTL, aty_ld_le32(CRTC_INT_CNTL, par) & ~0x20,
		    par);
	aty_st_le32(GUI_TRAJ_CNTL, 0x100023, par);

	/* insure engine is idle before leaving */
	wait_for_idle(par);
}

    /*
     *  Accelerated functions
     */

static inline void draw_rect(s16 x, s16 y, u16 width, u16 height,
			     struct atyfb_par *par)
{
	/* perform rectangle fill */
	wait_for_fifo(2, par);
	aty_st_le32(DST_Y_X, (x << 16) | y, par);
	aty_st_le32(DST_HEIGHT_WIDTH, (width << 16) | height, par);
	par->blitter_may_be_busy = 1;
}

void atyfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	u32 dy = area->dy, sy = area->sy, direction = DST_LAST_PEL;
	u32 sx = area->sx, dx = area->dx, width = area->width, rotation = 0;

	if (par->asleep)
		return;
	if (!area->width || !area->height)
		return;
	if (!par->accel_flags) {
		cfb_copyarea(info, area);
		return;
	}

	if (info->var.bits_per_pixel == 24) {
		/* In 24 bpp, the engine is in 8 bpp - this requires that all */
		/* horizontal coordinates and widths must be adjusted */
		sx *= 3;
		dx *= 3;
		width *= 3;
	}

	if (area->sy < area->dy) {
		dy += area->height - 1;
		sy += area->height - 1;
	} else
		direction |= DST_Y_TOP_TO_BOTTOM;

	if (sx < dx) {
		dx += width - 1;
		sx += width - 1;
	} else
		direction |= DST_X_LEFT_TO_RIGHT;

	if (info->var.bits_per_pixel == 24) {
		rotation = rotation24bpp(dx, direction);
	}

	wait_for_fifo(5, par);
	aty_st_le32(DP_PIX_WIDTH, par->crtc.dp_pix_width, par);
	aty_st_le32(DP_SRC, FRGD_SRC_BLIT, par);
	aty_st_le32(SRC_Y_X, (sx << 16) | sy, par);
	aty_st_le32(SRC_HEIGHT1_WIDTH1, (width << 16) | area->height, par);
	aty_st_le32(DST_CNTL, direction | rotation, par);
	draw_rect(dx, dy, width, area->height, par);
}

void atyfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	u32 color, dx = rect->dx, width = rect->width, rotation = 0;

	if (par->asleep)
		return;
	if (!rect->width || !rect->height)
		return;
	if (!par->accel_flags) {
		cfb_fillrect(info, rect);
		return;
	}

	if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
	    info->fix.visual == FB_VISUAL_DIRECTCOLOR)
		color = ((u32 *)(info->pseudo_palette))[rect->color];
	else
		color = rect->color;

	if (info->var.bits_per_pixel == 24) {
		/* In 24 bpp, the engine is in 8 bpp - this requires that all */
		/* horizontal coordinates and widths must be adjusted */
		dx *= 3;
		width *= 3;
		rotation = rotation24bpp(dx, DST_X_LEFT_TO_RIGHT);
	}

	wait_for_fifo(4, par);
	aty_st_le32(DP_PIX_WIDTH, par->crtc.dp_pix_width, par);
	aty_st_le32(DP_FRGD_CLR, color, par);
	aty_st_le32(DP_SRC,
		    BKGD_SRC_BKGD_CLR | FRGD_SRC_FRGD_CLR | MONO_SRC_ONE,
		    par);
	aty_st_le32(DST_CNTL,
		    DST_LAST_PEL | DST_Y_TOP_TO_BOTTOM |
		    DST_X_LEFT_TO_RIGHT | rotation, par);
	draw_rect(dx, rect->dy, width, rect->height, par);
}

void atyfb_imageblit(struct fb_info *info, const struct fb_image *image)
{
	struct atyfb_par *par = (struct atyfb_par *) info->par;
	u32 src_bytes, dx = image->dx, dy = image->dy, width = image->width;
	u32 pix_width, rotation = 0, src, mix;

	if (par->asleep)
		return;
	if (!image->width || !image->height)
		return;
	if (!par->accel_flags ||
	    (image->depth != 1 && info->var.bits_per_pixel != image->depth)) {
		cfb_imageblit(info, image);
		return;
	}

	pix_width = par->crtc.dp_pix_width;

	switch (image->depth) {
	case 1:
	    pix_width &= ~(BYTE_ORDER_MASK | HOST_MASK);
	    pix_width |= (BYTE_ORDER_MSB_TO_LSB | HOST_1BPP);
	    break;
	case 4:
	    pix_width &= ~(BYTE_ORDER_MASK | HOST_MASK);
	    pix_width |= (BYTE_ORDER_MSB_TO_LSB | HOST_4BPP);
	    break;
	case 8:
	    pix_width &= ~HOST_MASK;
	    pix_width |= HOST_8BPP;
	    break;
	case 15:
	    pix_width &= ~HOST_MASK;
	    pix_width |= HOST_15BPP;
	    break;
	case 16:
	    pix_width &= ~HOST_MASK;
	    pix_width |= HOST_16BPP;
	    break;
	case 24:
	    pix_width &= ~HOST_MASK;
	    pix_width |= HOST_24BPP;
	    break;
	case 32:
	    pix_width &= ~HOST_MASK;
	    pix_width |= HOST_32BPP;
	    break;
	}

	if (info->var.bits_per_pixel == 24) {
		/* In 24 bpp, the engine is in 8 bpp - this requires that all */
		/* horizontal coordinates and widths must be adjusted */
		dx *= 3;
		width *= 3;

		rotation = rotation24bpp(dx, DST_X_LEFT_TO_RIGHT);

		pix_width &= ~DST_MASK;
		pix_width |= DST_8BPP;

		/*
		 * since Rage 3D IIc we have DP_HOST_TRIPLE_EN bit
		 * this hwaccelerated triple has an issue with not aligned data
		 */
		if (image->depth == 1 && M64_HAS(HW_TRIPLE) && image->width % 8 == 0)
			pix_width |= DP_HOST_TRIPLE_EN;
	}

	if (image->depth == 1) {
		u32 fg, bg;
		if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
		    info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
			fg = ((u32*)(info->pseudo_palette))[image->fg_color];
			bg = ((u32*)(info->pseudo_palette))[image->bg_color];
		} else {
			fg = image->fg_color;
			bg = image->bg_color;
		}

		wait_for_fifo(2, par);
		aty_st_le32(DP_BKGD_CLR, bg, par);
		aty_st_le32(DP_FRGD_CLR, fg, par);
		src = MONO_SRC_HOST | FRGD_SRC_FRGD_CLR | BKGD_SRC_BKGD_CLR;
		mix = FRGD_MIX_S | BKGD_MIX_S;
	} else {
		src = MONO_SRC_ONE | FRGD_SRC_HOST;
		mix = FRGD_MIX_D_XOR_S | BKGD_MIX_D;
	}

	wait_for_fifo(5, par);
	aty_st_le32(DP_PIX_WIDTH, pix_width, par);
	aty_st_le32(DP_MIX, mix, par);
	aty_st_le32(DP_SRC, src, par);
	aty_st_le32(HOST_CNTL, HOST_BYTE_ALIGN, par);
	aty_st_le32(DST_CNTL, DST_Y_TOP_TO_BOTTOM | DST_X_LEFT_TO_RIGHT | rotation, par);

	draw_rect(dx, dy, width, image->height, par);
	src_bytes = (((image->width * image->depth) + 7) / 8) * image->height;

	/* manual triple each pixel */
	if (image->depth == 1 && info->var.bits_per_pixel == 24 && !(pix_width & DP_HOST_TRIPLE_EN)) {
		int inbit, outbit, mult24, byte_id_in_dword, width;
		u8 *pbitmapin = (u8*)image->data, *pbitmapout;
		u32 hostdword;

		for (width = image->width, inbit = 7, mult24 = 0; src_bytes; ) {
			for (hostdword = 0, pbitmapout = (u8*)&hostdword, byte_id_in_dword = 0;
				byte_id_in_dword < 4 && src_bytes;
				byte_id_in_dword++, pbitmapout++) {
				for (outbit = 7; outbit >= 0; outbit--) {
					*pbitmapout |= (((*pbitmapin >> inbit) & 1) << outbit);
					mult24++;
					/* next bit */
					if (mult24 == 3) {
						mult24 = 0;
						inbit--;
						width--;
					}

					/* next byte */
					if (inbit < 0 || width == 0) {
						src_bytes--;
						pbitmapin++;
						inbit = 7;

						if (width == 0) {
						    width = image->width;
						    outbit = 0;
						}
					}
				}
			}
			wait_for_fifo(1, par);
			aty_st_le32(HOST_DATA0, le32_to_cpu(hostdword), par);
		}
	} else {
		u32 *pbitmap, dwords = (src_bytes + 3) / 4;
		for (pbitmap = (u32*)(image->data); dwords; dwords--, pbitmap++) {
			wait_for_fifo(1, par);
			aty_st_le32(HOST_DATA0, get_unaligned_le32(pbitmap), par);
		}
	}
}