2 * Copyright 2007 Freescale Semiconductor, Inc.
3 * York Sun <yorksun@freescale.com>
5 * FSL DIU Framebuffer driver
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #ifdef CONFIG_FSL_DIU_FB
33 #include "fsl_diu_fb.h"
37 #define DPRINTF(fmt, args...) printf("%s: " fmt,__FUNCTION__,## args)
39 #define DPRINTF(fmt, args...)
44 const char *name; /* optional */
45 unsigned int refresh; /* optional */
48 unsigned int pixclock;
49 unsigned int left_margin;
50 unsigned int right_margin;
51 unsigned int upper_margin;
52 unsigned int lower_margin;
53 unsigned int hsync_len;
54 unsigned int vsync_len;
60 #define FB_SYNC_VERT_HIGH_ACT 2 /* vertical sync high active */
61 #define FB_SYNC_COMP_HIGH_ACT 8 /* composite sync high active */
62 #define FB_VMODE_NONINTERLACED 0 /* non interlaced */
65 * These parameters give default parameters
66 * for video output 1024x768,
67 * FIXME - change timing to proper amounts
68 * hsync 31.5kHz, vsync 60Hz
70 static struct fb_videomode fsl_diu_mode_1024 = {
81 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
82 .vmode = FB_VMODE_NONINTERLACED
85 static struct fb_videomode fsl_diu_mode_1280 = {
86 .name = "1280x1024-60",
97 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
98 .vmode = FB_VMODE_NONINTERLACED
102 * These are the fields of area descriptor(in DDR memory) for every plane
105 /* Word 0(32-bit) in DDR memory */
106 unsigned int pix_fmt; /* hard coding pixel format */
107 /* Word 1(32-bit) in DDR memory */
109 /* Word 2(32-bit) in DDR memory */
110 unsigned int src_size_g_alpha;
111 /* Word 3(32-bit) in DDR memory */
112 unsigned int aoi_size;
113 /* Word 4(32-bit) in DDR memory */
114 unsigned int offset_xyi;
115 /* Word 5(32-bit) in DDR memory */
116 unsigned int offset_xyd;
117 /* Word 6(32-bit) in DDR memory */
118 unsigned int ckmax_r:8;
119 unsigned int ckmax_g:8;
120 unsigned int ckmax_b:8;
122 /* Word 7(32-bit) in DDR memory */
123 unsigned int ckmin_r:8;
124 unsigned int ckmin_g:8;
125 unsigned int ckmin_b:8;
126 unsigned int res10:8;
127 /* Word 8(32-bit) in DDR memory */
128 unsigned int next_ad;
129 /* Word 9(32-bit) in DDR memory, just for 64-bit aligned */
133 }__attribute__ ((packed));
139 unsigned int desc[3];
141 unsigned int pallete;
143 unsigned int curs_pos;
144 unsigned int diu_mode;
146 unsigned int bgnd_wb;
147 unsigned int disp_size;
148 unsigned int wb_size;
149 unsigned int wb_mem_addr;
150 unsigned int hsyn_para;
151 unsigned int vsyn_para;
152 unsigned int syn_pol;
153 unsigned int thresholds;
154 unsigned int int_status;
155 unsigned int int_mask;
156 unsigned int colorbar[8];
157 unsigned int filling;
159 } __attribute__ ((packed));
163 volatile unsigned int mode; /* DIU operation mode */
167 unsigned char * paddr; /* Virtual address */
171 #define FSL_DIU_BASE_OFFSET 0x2C000 /* Offset of Display Interface Unit */
174 * Modes of operation of DIU
176 #define MFB_MODE0 0 /* DIU off */
177 #define MFB_MODE1 1 /* All three planes output to display */
178 #define MFB_MODE2 2 /* Plane 1 to display,
179 * planes 2+3 written back to memory */
180 #define MFB_MODE3 3 /* All three planes written back to memory */
181 #define MFB_MODE4 4 /* Color bar generation */
187 static struct fb_info fsl_fb_info;
188 static struct diu_addr gamma, cursor;
189 static struct diu_ad fsl_diu_fb_ad __attribute__ ((aligned(32)));
190 static struct diu_ad dummy_ad __attribute__ ((aligned(32)));
191 static unsigned char *dummy_fb;
192 static struct diu_hw dr = {
197 int fb_initialized = 0;
198 const int default_xres = 1280;
199 const int default_pixel_format = 0x88882317;
201 static int map_video_memory(struct fb_info *info, unsigned long bytes_align);
202 static void enable_lcdc(void);
203 static void disable_lcdc(void);
204 static int fsl_diu_enable_panel(struct fb_info *info);
205 static int fsl_diu_disable_panel(struct fb_info *info);
206 static int allocate_buf(struct diu_addr *buf, u32 size, u32 bytes_align);
207 static u32 get_busfreq(void);
210 int fsl_diu_init(int xres,
211 unsigned int pixel_format,
213 unsigned char *splash_bmp)
215 struct fb_videomode *fsl_diu_mode_db;
216 struct diu_ad *ad = &fsl_diu_fb_ad;
218 struct fb_info *info = &fsl_fb_info;
219 struct fb_var_screeninfo *var = &info->var;
220 volatile immap_t *immap = (immap_t *)CFG_IMMR;
221 volatile ccsr_gur_t *gur = &immap->im_gur;
222 volatile unsigned int *guts_clkdvdr = &gur->clkdvdr;
223 unsigned char *gamma_table_base;
225 unsigned long speed_ccb, temp, pixval;
227 DPRINTF("Enter fsl_diu_init\n");
228 dr.diu_reg = (struct diu *) (CFG_IMMR + FSL_DIU_BASE_OFFSET);
229 hw = (struct diu *) dr.diu_reg;
234 fsl_diu_mode_db = &fsl_diu_mode_1280;
236 fsl_diu_mode_db = &fsl_diu_mode_1024;
239 if (0 == fb_initialized) {
240 allocate_buf(&gamma, 768, 32);
241 DPRINTF("gamma is allocated @ 0x%x\n",
242 (unsigned int)gamma.paddr);
243 allocate_buf(&cursor, MAX_CURS * MAX_CURS * 2, 32);
244 DPRINTF("curosr is allocated @ 0x%x\n",
245 (unsigned int)cursor.paddr);
247 /* create a dummy fb and dummy ad */
248 dummy_fb = malloc(64);
249 if (NULL == dummy_fb) {
250 printf("Cannot allocate dummy fb\n");
253 dummy_ad.addr = cpu_to_le32((unsigned int)dummy_fb);
254 dummy_ad.pix_fmt = 0x88882317;
255 dummy_ad.src_size_g_alpha = 0x04400000; /* alpha = 0 */
256 dummy_ad.aoi_size = 0x02000400;
257 dummy_ad.offset_xyi = 0;
258 dummy_ad.offset_xyd = 0;
259 dummy_ad.next_ad = 0;
260 /* Memory allocation for framebuffer */
261 if (map_video_memory(info, 32)) {
262 printf("Unable to allocate fb memory 1\n");
266 memset(info->screen_base, 0, info->smem_len);
269 dr.diu_reg->desc[0] = (unsigned int) &dummy_ad;
270 dr.diu_reg->desc[1] = (unsigned int) &dummy_ad;
271 dr.diu_reg->desc[2] = (unsigned int) &dummy_ad;
272 DPRINTF("dummy dr.diu_reg->desc[0] = 0x%x\n", dr.diu_reg->desc[0]);
273 DPRINTF("dummy desc[0] = 0x%x\n", hw->desc[0]);
276 var->xres = fsl_diu_mode_db->xres;
277 var->yres = fsl_diu_mode_db->yres;
278 var->bits_per_pixel = 32;
279 var->pixclock = fsl_diu_mode_db->pixclock;
280 var->left_margin = fsl_diu_mode_db->left_margin;
281 var->right_margin = fsl_diu_mode_db->right_margin;
282 var->upper_margin = fsl_diu_mode_db->upper_margin;
283 var->lower_margin = fsl_diu_mode_db->lower_margin;
284 var->hsync_len = fsl_diu_mode_db->hsync_len;
285 var->vsync_len = fsl_diu_mode_db->vsync_len;
286 var->sync = fsl_diu_mode_db->sync;
287 var->vmode = fsl_diu_mode_db->vmode;
288 info->line_length = var->xres * var->bits_per_pixel / 8;
290 info->logo_height = 0;
292 ad->pix_fmt = pixel_format;
293 ad->addr = cpu_to_le32((unsigned int)info->screen_base);
295 = cpu_to_le32((var->yres << 12) | var->xres);
296 /* fix me. AOI should not be greater than display size */
297 ad->aoi_size = cpu_to_le32(( var->yres << 16) | var->xres);
301 /* Disable chroma keying function */
310 gamma_table_base = gamma.paddr;
311 DPRINTF("gamma_table_base is allocated @ 0x%x\n",
312 (unsigned int)gamma_table_base);
314 /* Prep for DIU init - gamma table */
316 for (i = 0; i <= 2; i++)
317 for (j = 0; j <= 255; j++)
318 *gamma_table_base++ = j;
320 if (gamma_fix == 1) { /* fix the gamma */
321 DPRINTF("Fix gamma table\n");
322 gamma_table_base = gamma.paddr;
323 for (i = 0; i < 256*3; i++) {
324 gamma_table_base[i] = (gamma_table_base[i] << 2)
325 | ((gamma_table_base[i] >> 6) & 0x03);
329 DPRINTF("update-lcdc: HW - %p\n Disabling DIU\n", hw);
331 /* Program DIU registers */
333 hw->gamma = (unsigned int) gamma.paddr;
334 hw->cursor= (unsigned int) cursor.paddr;
335 hw->bgnd = 0x007F7F7F; /* BGND */
336 hw->bgnd_wb = 0; /* BGND_WB */
337 hw->disp_size = var->yres << 16 | var->xres; /* DISP SIZE */
338 hw->wb_size = 0; /* WB SIZE */
339 hw->wb_mem_addr = 0; /* WB MEM ADDR */
340 hw->hsyn_para = var->left_margin << 22 | /* BP_H */
341 var->hsync_len << 11 | /* PW_H */
342 var->right_margin; /* FP_H */
343 hw->vsyn_para = var->upper_margin << 22 | /* BP_V */
344 var->vsync_len << 11 | /* PW_V */
345 var->lower_margin; /* FP_V */
347 /* Pixel Clock configuration */
348 DPRINTF("DIU: Bus Frequency = %d\n", get_busfreq());
349 speed_ccb = get_busfreq();
351 DPRINTF("DIU pixclock in ps - %d\n", var->pixclock);
354 temp /= var->pixclock;
356 pixval = speed_ccb / temp;
357 DPRINTF("DIU pixval = %lu\n", pixval);
359 hw->syn_pol = 0; /* SYNC SIGNALS POLARITY */
360 hw->thresholds = 0x00037800; /* The Thresholds */
361 hw->int_status = 0; /* INTERRUPT STATUS */
362 hw->int_mask = 0; /* INT MASK */
363 hw->plut = 0x01F5F666;
365 /* Modify PXCLK in GUTS CLKDVDR */
366 DPRINTF("DIU: Current value of CLKDVDR = 0x%08x\n", *guts_clkdvdr);
367 temp = *guts_clkdvdr & 0x2000FFFF;
368 *guts_clkdvdr = temp; /* turn off clock */
369 *guts_clkdvdr = temp | 0x80000000 | ((pixval & 0x1F) << 16);
370 DPRINTF("DIU: Modified value of CLKDVDR = 0x%08x\n", *guts_clkdvdr);
375 info->logo_height = fsl_diu_display_bmp(splash_bmp, 0, 0, 0);
376 info->logo_size = info->logo_height * info->line_length;
377 DPRINTF("logo height %d, logo_size 0x%x\n",
378 info->logo_height,info->logo_size);
382 fsl_diu_enable_panel(info);
388 char *fsl_fb_open(struct fb_info **info)
390 *info = &fsl_fb_info;
391 return (char *) ((unsigned int)(*info)->screen_base
392 + (*info)->logo_size);
395 void fsl_diu_close(void)
397 struct fb_info *info = &fsl_fb_info;
398 fsl_diu_disable_panel(info);
401 static int fsl_diu_enable_panel(struct fb_info *info)
403 struct diu *hw = dr.diu_reg;
404 struct diu_ad *ad = &fsl_diu_fb_ad;
406 DPRINTF("Entered: enable_panel\n");
407 if (hw->desc[0] != (unsigned int)ad)
408 hw->desc[0] = (unsigned int)ad;
409 DPRINTF("desc[0] = 0x%x\n", hw->desc[0]);
413 static int fsl_diu_disable_panel(struct fb_info *info)
415 struct diu *hw = dr.diu_reg;
417 DPRINTF("Entered: disable_panel\n");
418 if (hw->desc[0] != (unsigned int)&dummy_ad)
419 hw->desc[0] = (unsigned int)&dummy_ad;
423 static int map_video_memory(struct fb_info *info, unsigned long bytes_align)
425 unsigned long offset;
428 DPRINTF("Entered: map_video_memory\n");
429 /* allocate maximum 1280*1024 with 32bpp */
430 info->smem_len = 1280 * 4 *1024 + bytes_align;
431 DPRINTF("MAP_VIDEO_MEMORY: smem_len = %d\n", info->smem_len);
432 info->screen_base = malloc(info->smem_len);
433 if (info->screen_base == NULL) {
434 printf("Unable to allocate fb memory\n");
437 info->smem_start = (unsigned int) info->screen_base;
438 mask = bytes_align - 1;
439 offset = (unsigned long)info->screen_base & mask;
441 info->screen_base += offset;
442 info->smem_len = info->smem_len - (bytes_align - offset);
444 info->smem_len = info->smem_len - bytes_align;
446 info->screen_size = info->smem_len;
448 DPRINTF("Allocated fb @ 0x%08lx, size=%d.\n",
449 info->smem_start, info->smem_len);
454 static void enable_lcdc(void)
456 struct diu *hw = dr.diu_reg;
458 DPRINTF("Entered: enable_lcdc, fb_enabled = %d\n", fb_enabled);
460 hw->diu_mode = dr.mode;
463 DPRINTF("diu_mode = %d\n", hw->diu_mode);
466 static void disable_lcdc(void)
468 struct diu *hw = dr.diu_reg;
470 DPRINTF("Entered: disable_lcdc, fb_enabled = %d\n", fb_enabled);
477 static u32 get_busfreq(void)
481 fs_busfreq = get_bus_freq(0);
486 * Align to 64-bit(8-byte), 32-byte, etc.
488 static int allocate_buf(struct diu_addr *buf, u32 size, u32 bytes_align)
493 DPRINTF("Entered: allocate_buf\n");
494 ssize = size + bytes_align;
495 buf->paddr = malloc(ssize);
499 memset(buf->paddr, 0, ssize);
500 mask = bytes_align - 1;
501 offset = (u32)buf->paddr & mask;
503 buf->offset = bytes_align - offset;
504 buf->paddr = (unsigned char *) ((u32)buf->paddr + offset);
510 int fsl_diu_display_bmp(unsigned char *bmp,
515 struct fb_info *info = &fsl_fb_info;
516 unsigned char r, g, b;
517 unsigned int *fb_t, val;
518 unsigned char *bitmap;
519 unsigned int palette[256];
520 int width, height, bpp, ncolors, raster, offset, x, y, i, k, cpp;
523 printf("Must supply a bitmap address\n");
527 raster = bmp[10] + (bmp[11] << 8) + (bmp[12] << 16) + (bmp[13] << 24);
528 width = (bmp[21] << 24) | (bmp[20] << 16) | (bmp[19] << 8) | bmp[18];
529 height = (bmp[25] << 24) | (bmp[24] << 16) | (bmp[23] << 8) | bmp[22];
530 bpp = (bmp[29] << 8) | (bmp[28]);
531 ncolors = bmp[46] + (bmp[47] << 8) + (bmp[48] << 16) + (bmp[49] << 24);
532 bitmap = bmp + raster;
533 cpp = info->var.bits_per_pixel / 8;
535 DPRINTF("bmp = 0x%08x\n", (unsigned int)bmp);
536 DPRINTF("bitmap = 0x%08x\n", (unsigned int)bitmap);
537 DPRINTF("width = %d\n", width);
538 DPRINTF("height = %d\n", height);
539 DPRINTF("bpp = %d\n", bpp);
540 DPRINTF("ncolors = %d\n", ncolors);
542 DPRINTF("xres = %d\n", info->var.xres);
543 DPRINTF("yres = %d\n", info->var.yres);
544 DPRINTF("Screen_base = 0x%x\n", (unsigned int)info->screen_base);
546 if (((width+xoffset) > info->var.xres) ||
547 ((height+yoffset) > info->var.yres)) {
548 printf("bitmap is out of range, image too large or too much offset\n");
552 for (i = 0, offset = 54; i < ncolors; i++, offset += 4)
553 palette[i] = (bmp[offset+2] << 16)
554 + (bmp[offset+1] << 8) + bmp[offset];
559 for (y = height - 1; y >= 0; y--) {
560 fb_t = (unsigned int *) ((unsigned int)info->screen_base + (((y+yoffset) * info->var.xres) + xoffset)*cpp);
561 for (x = 0; x < width; x += 8) {
563 for (k = 0; k < 8; k++) {
571 for (i = (width / 2) % 4; i > 0; i--)
576 for (y = height - 1; y >= 0; y--) {
577 fb_t = (unsigned int *) ((unsigned int)info->screen_base + (((y+yoffset) * info->var.xres) + xoffset)*cpp);
578 for (x = 0; x < width; x += 2) {
582 *fb_t++ = palette[r];
583 *fb_t++ = palette[g];
585 for (i = (width / 2) % 4; i > 0; i--)
590 for (y = height - 1; y >= 0; y--) {
591 fb_t = (unsigned int *) ((unsigned int)info->screen_base + (((y+yoffset) * info->var.xres) + xoffset)*cpp);
592 for (x = 0; x < width; x++) {
593 *fb_t++ = palette[ *bitmap++ ];
595 for (i = (width / 2) % 4; i > 0; i--)
600 for (y = height - 1; y >= 0; y--) {
601 fb_t = (unsigned int *) ((unsigned int)info->screen_base + (((y+yoffset) * info->var.xres) + xoffset)*cpp);
602 for (x = 0; x < width; x++) {
606 val = (r << 16) + (g << 8) + b;
609 for (; (x % 4) != 0; x++) /* 4-byte alignment */
618 void fsl_diu_clear_screen(void)
620 struct fb_info *info = &fsl_fb_info;
622 memset(info->screen_base, 0, info->smem_len);
624 #endif /* CONFIG_FSL_DIU_FB */