1 /*
2 * Copyright 2014 Freescale Semiconductor, Inc.
3 *
4 * FSL DCU Framebuffer driver
5 *
6 * SPDX-License-Identifier: GPL-2.0+
7 */
8
9 #include <asm/io.h>
10 #include <common.h>
11 #include <fsl_dcu_fb.h>
12 #include <linux/fb.h>
13 #include <malloc.h>
14 #include <video_fb.h>
15 #include "videomodes.h"
16
17 /* Convert the X,Y resolution pair into a single number */
18 #define RESOLUTION(x, y) (((u32)(x) << 16) | (y))
19
20 #ifdef CONFIG_SYS_FSL_DCU_LE
21 #define dcu_read32 in_le32
22 #define dcu_write32 out_le32
23 #elif defined(CONFIG_SYS_FSL_DCU_BE)
24 #define dcu_read32 in_be32
25 #define dcu_write32 out_be32
26 #endif
27
28 #define DCU_MODE_BLEND_ITER(x) ((x) << 20)
29 #define DCU_MODE_RASTER_EN (1 << 14)
30 #define DCU_MODE_NORMAL 1
31 #define DCU_MODE_COLORBAR 3
32 #define DCU_BGND_R(x) ((x) << 16)
33 #define DCU_BGND_G(x) ((x) << 8)
34 #define DCU_BGND_B(x) (x)
35 #define DCU_DISP_SIZE_DELTA_Y(x) ((x) << 16)
36 #define DCU_DISP_SIZE_DELTA_X(x) (x)
37 #define DCU_HSYN_PARA_BP(x) ((x) << 22)
38 #define DCU_HSYN_PARA_PW(x) ((x) << 11)
39 #define DCU_HSYN_PARA_FP(x) (x)
40 #define DCU_VSYN_PARA_BP(x) ((x) << 22)
41 #define DCU_VSYN_PARA_PW(x) ((x) << 11)
42 #define DCU_VSYN_PARA_FP(x) (x)
43 #define DCU_SYN_POL_INV_PXCK_FALL (0 << 6)
44 #define DCU_SYN_POL_NEG_REMAIN (0 << 5)
45 #define DCU_SYN_POL_INV_VS_LOW (1 << 1)
46 #define DCU_SYN_POL_INV_HS_LOW (1)
47 #define DCU_THRESHOLD_LS_BF_VS(x) ((x) << 16)
48 #define DCU_THRESHOLD_OUT_BUF_HIGH(x) ((x) << 8)
49 #define DCU_THRESHOLD_OUT_BUF_LOW(x) (x)
50 #define DCU_UPDATE_MODE_MODE (1 << 31)
51 #define DCU_UPDATE_MODE_READREG (1 << 30)
52
53 #define DCU_CTRLDESCLN_1_HEIGHT(x) ((x) << 16)
54 #define DCU_CTRLDESCLN_1_WIDTH(x) (x)
55 #define DCU_CTRLDESCLN_2_POSY(x) ((x) << 16)
56 #define DCU_CTRLDESCLN_2_POSX(x) (x)
57 #define DCU_CTRLDESCLN_4_EN (1 << 31)
58 #define DCU_CTRLDESCLN_4_TILE_EN (1 << 30)
59 #define DCU_CTRLDESCLN_4_DATA_SEL_CLUT (1 << 29)
60 #define DCU_CTRLDESCLN_4_SAFETY_EN (1 << 28)
61 #define DCU_CTRLDESCLN_4_TRANS(x) ((x) << 20)
62 #define DCU_CTRLDESCLN_4_BPP(x) ((x) << 16)
63 #define DCU_CTRLDESCLN_4_RLE_EN (1 << 15)
64 #define DCU_CTRLDESCLN_4_LUOFFS(x) ((x) << 4)
65 #define DCU_CTRLDESCLN_4_BB_ON (1 << 2)
66 #define DCU_CTRLDESCLN_4_AB(x) (x)
67 #define DCU_CTRLDESCLN_5_CKMAX_R(x) ((x) << 16)
68 #define DCU_CTRLDESCLN_5_CKMAX_G(x) ((x) << 8)
69 #define DCU_CTRLDESCLN_5_CKMAX_B(x) (x)
70 #define DCU_CTRLDESCLN_6_CKMIN_R(x) ((x) << 16)
71 #define DCU_CTRLDESCLN_6_CKMIN_G(x) ((x) << 8)
72 #define DCU_CTRLDESCLN_6_CKMIN_B(x) (x)
73 #define DCU_CTRLDESCLN_7_TILE_VER(x) ((x) << 16)
74 #define DCU_CTRLDESCLN_7_TILE_HOR(x) (x)
75 #define DCU_CTRLDESCLN_8_FG_FCOLOR(x) (x)
76 #define DCU_CTRLDESCLN_9_BG_BCOLOR(x) (x)
77
78 #define BPP_16_RGB565 4
79 #define BPP_24_RGB888 5
80 #define BPP_32_ARGB8888 6
81
82 /*
83 * This setting is used for the TWR_LCD_RGB card
84 */
85 static struct fb_videomode fsl_dcu_mode_480_272 = {
86 .name = "480x272-60",
87 .refresh = 60,
88 .xres = 480,
89 .yres = 272,
90 .pixclock = 91996,
91 .left_margin = 2,
92 .right_margin = 2,
93 .upper_margin = 1,
94 .lower_margin = 1,
95 .hsync_len = 41,
96 .vsync_len = 2,
97 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
98 .vmode = FB_VMODE_NONINTERLACED
99 };
100
101 /*
102 * This setting is used for Siliconimage SiI9022A HDMI
103 */
104 static struct fb_videomode fsl_dcu_mode_640_480 = {
105 .name = "640x480-60",
106 .refresh = 60,
107 .xres = 640,
108 .yres = 480,
109 .pixclock = 39722,
110 .left_margin = 48,
111 .right_margin = 16,
112 .upper_margin = 33,
113 .lower_margin = 10,
114 .hsync_len = 96,
115 .vsync_len = 2,
116 .sync = 0,
117 .vmode = FB_VMODE_NONINTERLACED,
118 };
119
120 /*
121 * DCU register map
122 */
123 struct dcu_reg {
124 u32 desc_cursor[4];
125 u32 mode;
126 u32 bgnd;
127 u32 disp_size;
128 u32 hsyn_para;
129 u32 vsyn_para;
130 u32 synpol;
131 u32 threshold;
132 u32 int_status;
133 u32 int_mask;
134 u32 colbar[8];
135 u32 div_ratio;
136 u32 sign_calc[2];
137 u32 crc_val;
138 u8 res_064[0x6c-0x64];
139 u32 parr_err_status1;
140 u8 res_070[0x7c-0x70];
141 u32 parr_err_status3;
142 u32 mparr_err_status1;
143 u8 res_084[0x90-0x84];
144 u32 mparr_err_status3;
145 u32 threshold_inp_buf[2];
146 u8 res_09c[0xa0-0x9c];
147 u32 luma_comp;
148 u32 chroma_red;
149 u32 chroma_green;
150 u32 chroma_blue;
151 u32 crc_pos;
152 u32 lyr_intpol_en;
153 u32 lyr_luma_comp;
154 u32 lyr_chrm_red;
155 u32 lyr_chrm_grn;
156 u32 lyr_chrm_blue;
157 u8 res_0c4[0xcc-0xc8];
158 u32 update_mode;
159 u32 underrun;
160 u8 res_0d4[0x100-0xd4];
161 u32 gpr;
162 u32 slr_l[2];
163 u32 slr_disp_size;
164 u32 slr_hvsync_para;
165 u32 slr_pol;
166 u32 slr_l_transp[2];
167 u8 res_120[0x200-0x120];
168 u32 ctrldescl[DCU_LAYER_MAX_NUM][16];
169 };
170
171 static struct fb_info info;
172
reset_total_layers(void)173 static void reset_total_layers(void)
174 {
175 struct dcu_reg *regs = (struct dcu_reg *)CONFIG_SYS_DCU_ADDR;
176 int i;
177
178 for (i = 0; i < DCU_LAYER_MAX_NUM; i++) {
179 dcu_write32(®s->ctrldescl[i][0], 0);
180 dcu_write32(®s->ctrldescl[i][1], 0);
181 dcu_write32(®s->ctrldescl[i][2], 0);
182 dcu_write32(®s->ctrldescl[i][3], 0);
183 dcu_write32(®s->ctrldescl[i][4], 0);
184 dcu_write32(®s->ctrldescl[i][5], 0);
185 dcu_write32(®s->ctrldescl[i][6], 0);
186 dcu_write32(®s->ctrldescl[i][7], 0);
187 dcu_write32(®s->ctrldescl[i][8], 0);
188 dcu_write32(®s->ctrldescl[i][9], 0);
189 dcu_write32(®s->ctrldescl[i][10], 0);
190 }
191
192 dcu_write32(®s->update_mode, DCU_UPDATE_MODE_READREG);
193 }
194
layer_ctrldesc_init(int index,u32 pixel_format)195 static int layer_ctrldesc_init(int index, u32 pixel_format)
196 {
197 struct dcu_reg *regs = (struct dcu_reg *)CONFIG_SYS_DCU_ADDR;
198 unsigned int bpp = BPP_24_RGB888;
199
200 dcu_write32(®s->ctrldescl[index][0],
201 DCU_CTRLDESCLN_1_HEIGHT(info.var.yres) |
202 DCU_CTRLDESCLN_1_WIDTH(info.var.xres));
203
204 dcu_write32(®s->ctrldescl[index][1],
205 DCU_CTRLDESCLN_2_POSY(0) |
206 DCU_CTRLDESCLN_2_POSX(0));
207
208 dcu_write32(®s->ctrldescl[index][2], (unsigned int)info.screen_base);
209
210 switch (pixel_format) {
211 case 16:
212 bpp = BPP_16_RGB565;
213 break;
214 case 24:
215 bpp = BPP_24_RGB888;
216 break;
217 case 32:
218 bpp = BPP_32_ARGB8888;
219 break;
220 default:
221 printf("unsupported color depth: %u\n", pixel_format);
222 }
223
224 dcu_write32(®s->ctrldescl[index][3],
225 DCU_CTRLDESCLN_4_EN |
226 DCU_CTRLDESCLN_4_TRANS(0xff) |
227 DCU_CTRLDESCLN_4_BPP(bpp) |
228 DCU_CTRLDESCLN_4_AB(0));
229
230 dcu_write32(®s->ctrldescl[index][4],
231 DCU_CTRLDESCLN_5_CKMAX_R(0xff) |
232 DCU_CTRLDESCLN_5_CKMAX_G(0xff) |
233 DCU_CTRLDESCLN_5_CKMAX_B(0xff));
234 dcu_write32(®s->ctrldescl[index][5],
235 DCU_CTRLDESCLN_6_CKMIN_R(0) |
236 DCU_CTRLDESCLN_6_CKMIN_G(0) |
237 DCU_CTRLDESCLN_6_CKMIN_B(0));
238
239 dcu_write32(®s->ctrldescl[index][6],
240 DCU_CTRLDESCLN_7_TILE_VER(0) |
241 DCU_CTRLDESCLN_7_TILE_HOR(0));
242
243 dcu_write32(®s->ctrldescl[index][7], DCU_CTRLDESCLN_8_FG_FCOLOR(0));
244 dcu_write32(®s->ctrldescl[index][8], DCU_CTRLDESCLN_9_BG_BCOLOR(0));
245
246 dcu_write32(®s->update_mode, DCU_UPDATE_MODE_READREG);
247
248 return 0;
249 }
250
fsl_dcu_init(unsigned int xres,unsigned int yres,unsigned int pixel_format)251 int fsl_dcu_init(unsigned int xres, unsigned int yres,
252 unsigned int pixel_format)
253 {
254 struct dcu_reg *regs = (struct dcu_reg *)CONFIG_SYS_DCU_ADDR;
255 unsigned int div, mode;
256
257 /* Memory allocation for framebuffer */
258 info.screen_size =
259 info.var.xres * info.var.yres * (info.var.bits_per_pixel / 8);
260 info.screen_base = (char *)memalign(ARCH_DMA_MINALIGN,
261 roundup(info.screen_size, ARCH_DMA_MINALIGN));
262 memset(info.screen_base, 0, info.screen_size);
263
264 reset_total_layers();
265 div = dcu_set_pixel_clock(info.var.pixclock);
266 dcu_write32(®s->div_ratio, (div - 1));
267
268 dcu_write32(®s->disp_size,
269 DCU_DISP_SIZE_DELTA_Y(info.var.yres) |
270 DCU_DISP_SIZE_DELTA_X(info.var.xres / 16));
271
272 dcu_write32(®s->hsyn_para,
273 DCU_HSYN_PARA_BP(info.var.left_margin) |
274 DCU_HSYN_PARA_PW(info.var.hsync_len) |
275 DCU_HSYN_PARA_FP(info.var.right_margin));
276
277 dcu_write32(®s->vsyn_para,
278 DCU_VSYN_PARA_BP(info.var.upper_margin) |
279 DCU_VSYN_PARA_PW(info.var.vsync_len) |
280 DCU_VSYN_PARA_FP(info.var.lower_margin));
281
282 dcu_write32(®s->synpol,
283 DCU_SYN_POL_INV_PXCK_FALL |
284 DCU_SYN_POL_NEG_REMAIN |
285 DCU_SYN_POL_INV_VS_LOW |
286 DCU_SYN_POL_INV_HS_LOW);
287
288 dcu_write32(®s->bgnd,
289 DCU_BGND_R(0) | DCU_BGND_G(0) | DCU_BGND_B(0));
290
291 dcu_write32(®s->mode,
292 DCU_MODE_BLEND_ITER(DCU_LAYER_MAX_NUM) |
293 DCU_MODE_RASTER_EN);
294
295 dcu_write32(®s->threshold,
296 DCU_THRESHOLD_LS_BF_VS(0x3) |
297 DCU_THRESHOLD_OUT_BUF_HIGH(0x78) |
298 DCU_THRESHOLD_OUT_BUF_LOW(0));
299
300 mode = dcu_read32(®s->mode);
301 dcu_write32(®s->mode, mode | DCU_MODE_NORMAL);
302
303 layer_ctrldesc_init(0, pixel_format);
304
305 return 0;
306 }
307
video_hw_init(void)308 void *video_hw_init(void)
309 {
310 static GraphicDevice ctfb;
311 const char *options;
312 unsigned int depth = 0, freq = 0;
313 struct fb_videomode *fsl_dcu_mode_db = &fsl_dcu_mode_480_272;
314
315 if (!video_get_video_mode(&ctfb.winSizeX, &ctfb.winSizeY, &depth, &freq,
316 &options))
317 return NULL;
318
319 /* Find the monitor port, which is a required option */
320 if (!options)
321 return NULL;
322 if (strncmp(options, "monitor=", 8) != 0)
323 return NULL;
324
325 switch (RESOLUTION(ctfb.winSizeX, ctfb.winSizeY)) {
326 case RESOLUTION(480, 272):
327 fsl_dcu_mode_db = &fsl_dcu_mode_480_272;
328 break;
329 case RESOLUTION(640, 480):
330 fsl_dcu_mode_db = &fsl_dcu_mode_640_480;
331 break;
332 default:
333 printf("unsupported resolution %ux%u\n",
334 ctfb.winSizeX, ctfb.winSizeY);
335 }
336
337 info.var.xres = fsl_dcu_mode_db->xres;
338 info.var.yres = fsl_dcu_mode_db->yres;
339 info.var.bits_per_pixel = 32;
340 info.var.pixclock = fsl_dcu_mode_db->pixclock;
341 info.var.left_margin = fsl_dcu_mode_db->left_margin;
342 info.var.right_margin = fsl_dcu_mode_db->right_margin;
343 info.var.upper_margin = fsl_dcu_mode_db->upper_margin;
344 info.var.lower_margin = fsl_dcu_mode_db->lower_margin;
345 info.var.hsync_len = fsl_dcu_mode_db->hsync_len;
346 info.var.vsync_len = fsl_dcu_mode_db->vsync_len;
347 info.var.sync = fsl_dcu_mode_db->sync;
348 info.var.vmode = fsl_dcu_mode_db->vmode;
349 info.fix.line_length = info.var.xres * info.var.bits_per_pixel / 8;
350
351 if (platform_dcu_init(ctfb.winSizeX, ctfb.winSizeY,
352 options + 8, fsl_dcu_mode_db) < 0)
353 return NULL;
354
355 ctfb.frameAdrs = (unsigned int)info.screen_base;
356 ctfb.plnSizeX = ctfb.winSizeX;
357 ctfb.plnSizeY = ctfb.winSizeY;
358
359 ctfb.gdfBytesPP = 4;
360 ctfb.gdfIndex = GDF_32BIT_X888RGB;
361
362 ctfb.memSize = info.screen_size;
363
364 return &ctfb;
365 }
366