1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * drivers/mb862xx/mb862xxfb_accel.c
4 *
5 * Fujitsu Carmine/Coral-P(A)/Lime framebuffer driver acceleration support
6 *
7 * (C) 2007 Alexander Shishkin <virtuoso@slind.org>
8 * (C) 2009 Valentin Sitdikov <v.sitdikov@gmail.com>
9 * (C) 2009 Siemens AG
10 */
11 #include <linux/fb.h>
12 #include <linux/delay.h>
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <linux/module.h>
16 #include <linux/pci.h>
17 #include <linux/slab.h>
18
19 #include "mb862xxfb.h"
20 #include "mb862xx_reg.h"
21 #include "mb862xxfb_accel.h"
22
mb862xxfb_write_fifo(u32 count,u32 * data,struct fb_info * info)23 static void mb862xxfb_write_fifo(u32 count, u32 *data, struct fb_info *info)
24 {
25 struct mb862xxfb_par *par = info->par;
26 static u32 free;
27
28 u32 total = 0;
29 while (total < count) {
30 if (free) {
31 outreg(geo, GDC_GEO_REG_INPUT_FIFO, data[total]);
32 total++;
33 free--;
34 } else {
35 free = (u32) inreg(draw, GDC_REG_FIFO_COUNT);
36 }
37 }
38 }
39
mb86290fb_copyarea(struct fb_info * info,const struct fb_copyarea * area)40 static void mb86290fb_copyarea(struct fb_info *info,
41 const struct fb_copyarea *area)
42 {
43 __u32 cmd[6];
44
45 cmd[0] = (GDC_TYPE_SETREGISTER << 24) | (1 << 16) | GDC_REG_MODE_BITMAP;
46 /* Set raster operation */
47 cmd[1] = (2 << 7) | (GDC_ROP_COPY << 9);
48 cmd[2] = GDC_TYPE_BLTCOPYP << 24;
49
50 if (area->sx >= area->dx && area->sy >= area->dy)
51 cmd[2] |= GDC_CMD_BLTCOPY_TOP_LEFT << 16;
52 else if (area->sx >= area->dx && area->sy <= area->dy)
53 cmd[2] |= GDC_CMD_BLTCOPY_BOTTOM_LEFT << 16;
54 else if (area->sx <= area->dx && area->sy >= area->dy)
55 cmd[2] |= GDC_CMD_BLTCOPY_TOP_RIGHT << 16;
56 else
57 cmd[2] |= GDC_CMD_BLTCOPY_BOTTOM_RIGHT << 16;
58
59 cmd[3] = (area->sy << 16) | area->sx;
60 cmd[4] = (area->dy << 16) | area->dx;
61 cmd[5] = (area->height << 16) | area->width;
62 mb862xxfb_write_fifo(6, cmd, info);
63 }
64
65 /*
66 * Fill in the cmd array /GDC FIFO commands/ to draw a 1bit image.
67 * Make sure cmd has enough room!
68 */
mb86290fb_imageblit1(u32 * cmd,u16 step,u16 dx,u16 dy,u16 width,u16 height,u32 fgcolor,u32 bgcolor,const struct fb_image * image,struct fb_info * info)69 static void mb86290fb_imageblit1(u32 *cmd, u16 step, u16 dx, u16 dy,
70 u16 width, u16 height, u32 fgcolor,
71 u32 bgcolor, const struct fb_image *image,
72 struct fb_info *info)
73 {
74 int i;
75 unsigned const char *line;
76 u16 bytes;
77
78 /* set colors and raster operation regs */
79 cmd[0] = (GDC_TYPE_SETREGISTER << 24) | (1 << 16) | GDC_REG_MODE_BITMAP;
80 /* Set raster operation */
81 cmd[1] = (2 << 7) | (GDC_ROP_COPY << 9);
82 cmd[2] =
83 (GDC_TYPE_SETCOLORREGISTER << 24) | (GDC_CMD_BODY_FORE_COLOR << 16);
84 cmd[3] = fgcolor;
85 cmd[4] =
86 (GDC_TYPE_SETCOLORREGISTER << 24) | (GDC_CMD_BODY_BACK_COLOR << 16);
87 cmd[5] = bgcolor;
88
89 i = 0;
90 line = image->data;
91 bytes = (image->width + 7) >> 3;
92
93 /* and the image */
94 cmd[6] = (GDC_TYPE_DRAWBITMAPP << 24) |
95 (GDC_CMD_BITMAP << 16) | (2 + (step * height));
96 cmd[7] = (dy << 16) | dx;
97 cmd[8] = (height << 16) | width;
98
99 while (i < height) {
100 memcpy(&cmd[9 + i * step], line, step << 2);
101 #ifdef __LITTLE_ENDIAN
102 {
103 int k = 0;
104 for (k = 0; k < step; k++)
105 cmd[9 + i * step + k] =
106 cpu_to_be32(cmd[9 + i * step + k]);
107 }
108 #endif
109 line += bytes;
110 i++;
111 }
112 }
113
114 /*
115 * Fill in the cmd array /GDC FIFO commands/ to draw a 8bit image.
116 * Make sure cmd has enough room!
117 */
mb86290fb_imageblit8(u32 * cmd,u16 step,u16 dx,u16 dy,u16 width,u16 height,u32 fgcolor,u32 bgcolor,const struct fb_image * image,struct fb_info * info)118 static void mb86290fb_imageblit8(u32 *cmd, u16 step, u16 dx, u16 dy,
119 u16 width, u16 height, u32 fgcolor,
120 u32 bgcolor, const struct fb_image *image,
121 struct fb_info *info)
122 {
123 int i, j;
124 unsigned const char *line, *ptr;
125 u16 bytes;
126
127 cmd[0] = (GDC_TYPE_DRAWBITMAPP << 24) |
128 (GDC_CMD_BLT_DRAW << 16) | (2 + (height * step));
129 cmd[1] = (dy << 16) | dx;
130 cmd[2] = (height << 16) | width;
131
132 i = 0;
133 line = image->data;
134 bytes = image->width;
135
136 while (i < height) {
137 ptr = line;
138 for (j = 0; j < step; j++) {
139 cmd[3 + i * step + j] =
140 (((u32 *) (info->pseudo_palette))[*ptr]) & 0xffff;
141 ptr++;
142 cmd[3 + i * step + j] |=
143 ((((u32 *) (info->
144 pseudo_palette))[*ptr]) & 0xffff) << 16;
145 ptr++;
146 }
147
148 line += bytes;
149 i++;
150 }
151 }
152
153 /*
154 * Fill in the cmd array /GDC FIFO commands/ to draw a 16bit image.
155 * Make sure cmd has enough room!
156 */
mb86290fb_imageblit16(u32 * cmd,u16 step,u16 dx,u16 dy,u16 width,u16 height,u32 fgcolor,u32 bgcolor,const struct fb_image * image,struct fb_info * info)157 static void mb86290fb_imageblit16(u32 *cmd, u16 step, u16 dx, u16 dy,
158 u16 width, u16 height, u32 fgcolor,
159 u32 bgcolor, const struct fb_image *image,
160 struct fb_info *info)
161 {
162 int i;
163 unsigned const char *line;
164 u16 bytes;
165
166 i = 0;
167 line = image->data;
168 bytes = image->width << 1;
169
170 cmd[0] = (GDC_TYPE_DRAWBITMAPP << 24) |
171 (GDC_CMD_BLT_DRAW << 16) | (2 + step * height);
172 cmd[1] = (dy << 16) | dx;
173 cmd[2] = (height << 16) | width;
174
175 while (i < height) {
176 memcpy(&cmd[3 + i * step], line, step);
177 line += bytes;
178 i++;
179 }
180 }
181
mb86290fb_imageblit(struct fb_info * info,const struct fb_image * image)182 static void mb86290fb_imageblit(struct fb_info *info,
183 const struct fb_image *image)
184 {
185 u32 *cmd = NULL;
186 void (*cmdfn) (u32 *, u16, u16, u16, u16, u16, u32, u32,
187 const struct fb_image *, struct fb_info *) = NULL;
188 u32 cmdlen;
189 u32 fgcolor = 0, bgcolor = 0;
190 u16 step;
191
192 u16 width = image->width, height = image->height;
193 u16 dx = image->dx, dy = image->dy;
194 int x2, y2, vxres, vyres;
195
196 x2 = image->dx + image->width;
197 y2 = image->dy + image->height;
198 vxres = info->var.xres_virtual;
199 vyres = info->var.yres_virtual;
200 x2 = min(x2, vxres);
201 y2 = min(y2, vyres);
202 width = x2 - dx;
203 height = y2 - dy;
204
205 switch (image->depth) {
206 case 1:
207 step = (width + 31) >> 5;
208 cmdlen = 9 + height * step;
209 cmdfn = mb86290fb_imageblit1;
210 if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
211 info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
212 fgcolor =
213 ((u32 *) (info->pseudo_palette))[image->fg_color];
214 bgcolor =
215 ((u32 *) (info->pseudo_palette))[image->bg_color];
216 } else {
217 fgcolor = image->fg_color;
218 bgcolor = image->bg_color;
219 }
220
221 break;
222
223 case 8:
224 step = (width + 1) >> 1;
225 cmdlen = 3 + height * step;
226 cmdfn = mb86290fb_imageblit8;
227 break;
228
229 case 16:
230 step = (width + 1) >> 1;
231 cmdlen = 3 + height * step;
232 cmdfn = mb86290fb_imageblit16;
233 break;
234
235 default:
236 cfb_imageblit(info, image);
237 return;
238 }
239
240 cmd = kmalloc_array(cmdlen, 4, GFP_DMA);
241 if (!cmd)
242 return cfb_imageblit(info, image);
243 cmdfn(cmd, step, dx, dy, width, height, fgcolor, bgcolor, image, info);
244 mb862xxfb_write_fifo(cmdlen, cmd, info);
245 kfree(cmd);
246 }
247
mb86290fb_fillrect(struct fb_info * info,const struct fb_fillrect * rect)248 static void mb86290fb_fillrect(struct fb_info *info,
249 const struct fb_fillrect *rect)
250 {
251
252 u32 x2, y2, vxres, vyres, height, width, fg;
253 u32 cmd[7];
254
255 vxres = info->var.xres_virtual;
256 vyres = info->var.yres_virtual;
257
258 if (!rect->width || !rect->height || rect->dx > vxres
259 || rect->dy > vyres)
260 return;
261
262 /* We could use hardware clipping but on many cards you get around
263 * hardware clipping by writing to framebuffer directly. */
264 x2 = rect->dx + rect->width;
265 y2 = rect->dy + rect->height;
266 x2 = min(x2, vxres);
267 y2 = min(y2, vyres);
268 width = x2 - rect->dx;
269 height = y2 - rect->dy;
270 if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
271 info->fix.visual == FB_VISUAL_DIRECTCOLOR)
272 fg = ((u32 *) (info->pseudo_palette))[rect->color];
273 else
274 fg = rect->color;
275
276 switch (rect->rop) {
277
278 case ROP_XOR:
279 /* Set raster operation */
280 cmd[1] = (2 << 7) | (GDC_ROP_XOR << 9);
281 break;
282
283 case ROP_COPY:
284 /* Set raster operation */
285 cmd[1] = (2 << 7) | (GDC_ROP_COPY << 9);
286 break;
287
288 }
289
290 cmd[0] = (GDC_TYPE_SETREGISTER << 24) | (1 << 16) | GDC_REG_MODE_BITMAP;
291 /* cmd[1] set earlier */
292 cmd[2] =
293 (GDC_TYPE_SETCOLORREGISTER << 24) | (GDC_CMD_BODY_FORE_COLOR << 16);
294 cmd[3] = fg;
295 cmd[4] = (GDC_TYPE_DRAWRECTP << 24) | (GDC_CMD_BLT_FILL << 16);
296 cmd[5] = (rect->dy << 16) | (rect->dx);
297 cmd[6] = (height << 16) | width;
298
299 mb862xxfb_write_fifo(7, cmd, info);
300 }
301
mb862xxfb_init_accel(struct fb_info * info,struct fb_ops * fbops,int xres)302 void mb862xxfb_init_accel(struct fb_info *info, struct fb_ops *fbops, int xres)
303 {
304 struct mb862xxfb_par *par = info->par;
305
306 if (info->var.bits_per_pixel == 32) {
307 fbops->fb_fillrect = cfb_fillrect;
308 fbops->fb_copyarea = cfb_copyarea;
309 fbops->fb_imageblit = cfb_imageblit;
310 } else {
311 outreg(disp, GC_L0EM, 3);
312 fbops->fb_fillrect = mb86290fb_fillrect;
313 fbops->fb_copyarea = mb86290fb_copyarea;
314 fbops->fb_imageblit = mb86290fb_imageblit;
315 }
316 outreg(draw, GDC_REG_DRAW_BASE, 0);
317 outreg(draw, GDC_REG_MODE_MISC, 0x8000);
318 outreg(draw, GDC_REG_X_RESOLUTION, xres);
319
320 info->flags |=
321 FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
322 FBINFO_HWACCEL_IMAGEBLIT;
323 info->fix.accel = 0xff; /*FIXME: add right define */
324 }
325
326 MODULE_LICENSE("GPL v2");
327