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[u-boot] / drivers / video / mxc_ipuv3_fb.c
1 /*
2  * Porting to u-boot:
3  *
4  * (C) Copyright 2010
5  * Stefano Babic, DENX Software Engineering, sbabic@denx.de
6  *
7  * MX51 Linux framebuffer:
8  *
9  * (C) Copyright 2004-2010 Freescale Semiconductor, Inc.
10  *
11  * SPDX-License-Identifier:     GPL-2.0+
12  */
13
14 #include <common.h>
15 #include <linux/errno.h>
16 #include <asm/global_data.h>
17 #include <linux/string.h>
18 #include <linux/list.h>
19 #include <linux/fb.h>
20 #include <asm/io.h>
21 #include <malloc.h>
22 #include <video_fb.h>
23 #include "videomodes.h"
24 #include "ipu.h"
25 #include "mxcfb.h"
26 #include "ipu_regs.h"
27
28 DECLARE_GLOBAL_DATA_PTR;
29
30 static int mxcfb_map_video_memory(struct fb_info *fbi);
31 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
32
33 /* graphics setup */
34 static GraphicDevice panel;
35 static struct fb_videomode const *gmode;
36 static uint8_t gdisp;
37 static uint32_t gpixfmt;
38
39 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
40                          const struct fb_videomode *mode)
41 {
42         var->xres = mode->xres;
43         var->yres = mode->yres;
44         var->xres_virtual = mode->xres;
45         var->yres_virtual = mode->yres;
46         var->xoffset = 0;
47         var->yoffset = 0;
48         var->pixclock = mode->pixclock;
49         var->left_margin = mode->left_margin;
50         var->right_margin = mode->right_margin;
51         var->upper_margin = mode->upper_margin;
52         var->lower_margin = mode->lower_margin;
53         var->hsync_len = mode->hsync_len;
54         var->vsync_len = mode->vsync_len;
55         var->sync = mode->sync;
56         var->vmode = mode->vmode & FB_VMODE_MASK;
57 }
58
59 /*
60  * Structure containing the MXC specific framebuffer information.
61  */
62 struct mxcfb_info {
63         int blank;
64         ipu_channel_t ipu_ch;
65         int ipu_di;
66         u32 ipu_di_pix_fmt;
67         unsigned char overlay;
68         unsigned char alpha_chan_en;
69         dma_addr_t alpha_phy_addr0;
70         dma_addr_t alpha_phy_addr1;
71         void *alpha_virt_addr0;
72         void *alpha_virt_addr1;
73         uint32_t alpha_mem_len;
74         uint32_t cur_ipu_buf;
75         uint32_t cur_ipu_alpha_buf;
76
77         u32 pseudo_palette[16];
78 };
79
80 enum {
81         BOTH_ON,
82         SRC_ON,
83         TGT_ON,
84         BOTH_OFF
85 };
86
87 static unsigned long default_bpp = 16;
88 static unsigned char g_dp_in_use;
89 static struct fb_info *mxcfb_info[3];
90 static int ext_clk_used;
91
92 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
93 {
94         uint32_t pixfmt = 0;
95
96         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
97
98         if (fbi->var.nonstd)
99                 return fbi->var.nonstd;
100
101         switch (fbi->var.bits_per_pixel) {
102         case 24:
103                 pixfmt = IPU_PIX_FMT_BGR24;
104                 break;
105         case 32:
106                 pixfmt = IPU_PIX_FMT_BGR32;
107                 break;
108         case 16:
109                 pixfmt = IPU_PIX_FMT_RGB565;
110                 break;
111         }
112         return pixfmt;
113 }
114
115 /*
116  * Set fixed framebuffer parameters based on variable settings.
117  *
118  * @param       info     framebuffer information pointer
119  */
120 static int mxcfb_set_fix(struct fb_info *info)
121 {
122         struct fb_fix_screeninfo *fix = &info->fix;
123         struct fb_var_screeninfo *var = &info->var;
124
125         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
126
127         fix->type = FB_TYPE_PACKED_PIXELS;
128         fix->accel = FB_ACCEL_NONE;
129         fix->visual = FB_VISUAL_TRUECOLOR;
130         fix->xpanstep = 1;
131         fix->ypanstep = 1;
132
133         return 0;
134 }
135
136 static int setup_disp_channel1(struct fb_info *fbi)
137 {
138         ipu_channel_params_t params;
139         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
140
141         memset(&params, 0, sizeof(params));
142         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
143
144         debug("%s called\n", __func__);
145         /*
146          * Assuming interlaced means yuv output, below setting also
147          * valid for mem_dc_sync. FG should have the same vmode as BG.
148          */
149         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
150                 params.mem_dp_bg_sync.interlaced = 1;
151                 params.mem_dp_bg_sync.out_pixel_fmt =
152                         IPU_PIX_FMT_YUV444;
153         } else {
154                 if (mxc_fbi->ipu_di_pix_fmt) {
155                         params.mem_dp_bg_sync.out_pixel_fmt =
156                                 mxc_fbi->ipu_di_pix_fmt;
157                 } else {
158                         params.mem_dp_bg_sync.out_pixel_fmt =
159                                 IPU_PIX_FMT_RGB666;
160                 }
161         }
162         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
163         if (mxc_fbi->alpha_chan_en)
164                 params.mem_dp_bg_sync.alpha_chan_en = 1;
165
166         ipu_init_channel(mxc_fbi->ipu_ch, &params);
167
168         return 0;
169 }
170
171 static int setup_disp_channel2(struct fb_info *fbi)
172 {
173         int retval = 0;
174         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
175
176         mxc_fbi->cur_ipu_buf = 1;
177         if (mxc_fbi->alpha_chan_en)
178                 mxc_fbi->cur_ipu_alpha_buf = 1;
179
180         fbi->var.xoffset = fbi->var.yoffset = 0;
181
182         debug("%s: %x %d %d %d %lx %lx\n",
183                 __func__,
184                 mxc_fbi->ipu_ch,
185                 fbi->var.xres,
186                 fbi->var.yres,
187                 fbi->fix.line_length,
188                 fbi->fix.smem_start,
189                 fbi->fix.smem_start +
190                 (fbi->fix.line_length * fbi->var.yres));
191
192         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
193                                          bpp_to_pixfmt(fbi),
194                                          fbi->var.xres, fbi->var.yres,
195                                          fbi->fix.line_length,
196                                          fbi->fix.smem_start +
197                                          (fbi->fix.line_length * fbi->var.yres),
198                                          fbi->fix.smem_start,
199                                          0, 0);
200         if (retval)
201                 printf("ipu_init_channel_buffer error %d\n", retval);
202
203         return retval;
204 }
205
206 /*
207  * Set framebuffer parameters and change the operating mode.
208  *
209  * @param       info     framebuffer information pointer
210  */
211 static int mxcfb_set_par(struct fb_info *fbi)
212 {
213         int retval = 0;
214         u32 mem_len;
215         ipu_di_signal_cfg_t sig_cfg;
216         struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
217         uint32_t out_pixel_fmt;
218
219         ipu_disable_channel(mxc_fbi->ipu_ch);
220         ipu_uninit_channel(mxc_fbi->ipu_ch);
221         mxcfb_set_fix(fbi);
222
223         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
224         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
225                 if (fbi->fix.smem_start)
226                         mxcfb_unmap_video_memory(fbi);
227
228                 if (mxcfb_map_video_memory(fbi) < 0)
229                         return -ENOMEM;
230         }
231
232         setup_disp_channel1(fbi);
233
234         memset(&sig_cfg, 0, sizeof(sig_cfg));
235         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
236                 sig_cfg.interlaced = 1;
237                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
238         } else {
239                 if (mxc_fbi->ipu_di_pix_fmt)
240                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
241                 else
242                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
243         }
244         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
245                 sig_cfg.odd_field_first = 1;
246         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
247                 sig_cfg.ext_clk = 1;
248         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
249                 sig_cfg.Hsync_pol = 1;
250         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
251                 sig_cfg.Vsync_pol = 1;
252         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
253                 sig_cfg.clk_pol = 1;
254         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
255                 sig_cfg.data_pol = 1;
256         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
257                 sig_cfg.enable_pol = 1;
258         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
259                 sig_cfg.clkidle_en = 1;
260
261         debug("pixclock = %lu Hz\n", PICOS2KHZ(fbi->var.pixclock) * 1000UL);
262
263         if (ipu_init_sync_panel(mxc_fbi->ipu_di,
264                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
265                                 fbi->var.xres, fbi->var.yres,
266                                 out_pixel_fmt,
267                                 fbi->var.left_margin,
268                                 fbi->var.hsync_len,
269                                 fbi->var.right_margin,
270                                 fbi->var.upper_margin,
271                                 fbi->var.vsync_len,
272                                 fbi->var.lower_margin,
273                                 0, sig_cfg) != 0) {
274                 puts("mxcfb: Error initializing panel.\n");
275                 return -EINVAL;
276         }
277
278         retval = setup_disp_channel2(fbi);
279         if (retval)
280                 return retval;
281
282         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
283                 ipu_enable_channel(mxc_fbi->ipu_ch);
284
285         return retval;
286 }
287
288 /*
289  * Check framebuffer variable parameters and adjust to valid values.
290  *
291  * @param       var      framebuffer variable parameters
292  *
293  * @param       info     framebuffer information pointer
294  */
295 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
296 {
297         u32 vtotal;
298         u32 htotal;
299
300         if (var->xres_virtual < var->xres)
301                 var->xres_virtual = var->xres;
302         if (var->yres_virtual < var->yres)
303                 var->yres_virtual = var->yres;
304
305         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
306             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
307                 var->bits_per_pixel = default_bpp;
308
309         switch (var->bits_per_pixel) {
310         case 8:
311                 var->red.length = 3;
312                 var->red.offset = 5;
313                 var->red.msb_right = 0;
314
315                 var->green.length = 3;
316                 var->green.offset = 2;
317                 var->green.msb_right = 0;
318
319                 var->blue.length = 2;
320                 var->blue.offset = 0;
321                 var->blue.msb_right = 0;
322
323                 var->transp.length = 0;
324                 var->transp.offset = 0;
325                 var->transp.msb_right = 0;
326                 break;
327         case 16:
328                 var->red.length = 5;
329                 var->red.offset = 11;
330                 var->red.msb_right = 0;
331
332                 var->green.length = 6;
333                 var->green.offset = 5;
334                 var->green.msb_right = 0;
335
336                 var->blue.length = 5;
337                 var->blue.offset = 0;
338                 var->blue.msb_right = 0;
339
340                 var->transp.length = 0;
341                 var->transp.offset = 0;
342                 var->transp.msb_right = 0;
343                 break;
344         case 24:
345                 var->red.length = 8;
346                 var->red.offset = 16;
347                 var->red.msb_right = 0;
348
349                 var->green.length = 8;
350                 var->green.offset = 8;
351                 var->green.msb_right = 0;
352
353                 var->blue.length = 8;
354                 var->blue.offset = 0;
355                 var->blue.msb_right = 0;
356
357                 var->transp.length = 0;
358                 var->transp.offset = 0;
359                 var->transp.msb_right = 0;
360                 break;
361         case 32:
362                 var->red.length = 8;
363                 var->red.offset = 16;
364                 var->red.msb_right = 0;
365
366                 var->green.length = 8;
367                 var->green.offset = 8;
368                 var->green.msb_right = 0;
369
370                 var->blue.length = 8;
371                 var->blue.offset = 0;
372                 var->blue.msb_right = 0;
373
374                 var->transp.length = 8;
375                 var->transp.offset = 24;
376                 var->transp.msb_right = 0;
377                 break;
378         }
379
380         if (var->pixclock < 1000) {
381                 htotal = var->xres + var->right_margin + var->hsync_len +
382                     var->left_margin;
383                 vtotal = var->yres + var->lower_margin + var->vsync_len +
384                     var->upper_margin;
385                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
386                 var->pixclock = KHZ2PICOS(var->pixclock);
387                 printf("pixclock set for 60Hz refresh = %u ps\n",
388                         var->pixclock);
389         }
390
391         var->height = -1;
392         var->width = -1;
393         var->grayscale = 0;
394
395         return 0;
396 }
397
398 static int mxcfb_map_video_memory(struct fb_info *fbi)
399 {
400         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
401                 fbi->fix.smem_len = fbi->var.yres_virtual *
402                                     fbi->fix.line_length;
403         }
404         fbi->fix.smem_len = roundup(fbi->fix.smem_len, ARCH_DMA_MINALIGN);
405         fbi->screen_base = (char *)memalign(ARCH_DMA_MINALIGN,
406                                             fbi->fix.smem_len);
407         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
408         if (fbi->screen_base == 0) {
409                 puts("Unable to allocate framebuffer memory\n");
410                 fbi->fix.smem_len = 0;
411                 fbi->fix.smem_start = 0;
412                 return -EBUSY;
413         }
414
415         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
416                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
417
418         fbi->screen_size = fbi->fix.smem_len;
419
420         gd->fb_base = fbi->fix.smem_start;
421
422         /* Clear the screen */
423         memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
424
425         return 0;
426 }
427
428 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
429 {
430         fbi->screen_base = 0;
431         fbi->fix.smem_start = 0;
432         fbi->fix.smem_len = 0;
433         return 0;
434 }
435
436 /*
437  * Initializes the framebuffer information pointer. After allocating
438  * sufficient memory for the framebuffer structure, the fields are
439  * filled with custom information passed in from the configurable
440  * structures.  This includes information such as bits per pixel,
441  * color maps, screen width/height and RGBA offsets.
442  *
443  * @return      Framebuffer structure initialized with our information
444  */
445 static struct fb_info *mxcfb_init_fbinfo(void)
446 {
447 #define BYTES_PER_LONG 4
448 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
449         struct fb_info *fbi;
450         struct mxcfb_info *mxcfbi;
451         char *p;
452         int size = sizeof(struct mxcfb_info) + PADDING +
453                 sizeof(struct fb_info);
454
455         debug("%s: %d %d %d %d\n",
456                 __func__,
457                 PADDING,
458                 size,
459                 sizeof(struct mxcfb_info),
460                 sizeof(struct fb_info));
461         /*
462          * Allocate sufficient memory for the fb structure
463          */
464
465         p = malloc(size);
466         if (!p)
467                 return NULL;
468
469         memset(p, 0, size);
470
471         fbi = (struct fb_info *)p;
472         fbi->par = p + sizeof(struct fb_info) + PADDING;
473
474         mxcfbi = (struct mxcfb_info *)fbi->par;
475         debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
476                 (unsigned int)fbi, (unsigned int)mxcfbi);
477
478         fbi->var.activate = FB_ACTIVATE_NOW;
479
480         fbi->flags = FBINFO_FLAG_DEFAULT;
481         fbi->pseudo_palette = mxcfbi->pseudo_palette;
482
483         return fbi;
484 }
485
486 /*
487  * Probe routine for the framebuffer driver. It is called during the
488  * driver binding process. The following functions are performed in
489  * this routine: Framebuffer initialization, Memory allocation and
490  * mapping, Framebuffer registration, IPU initialization.
491  *
492  * @return      Appropriate error code to the kernel common code
493  */
494 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp,
495                         struct fb_videomode const *mode)
496 {
497         struct fb_info *fbi;
498         struct mxcfb_info *mxcfbi;
499         int ret = 0;
500
501         /*
502          * Initialize FB structures
503          */
504         fbi = mxcfb_init_fbinfo();
505         if (!fbi) {
506                 ret = -ENOMEM;
507                 goto err0;
508         }
509         mxcfbi = (struct mxcfb_info *)fbi->par;
510
511         if (!g_dp_in_use) {
512                 mxcfbi->ipu_ch = MEM_BG_SYNC;
513                 mxcfbi->blank = FB_BLANK_UNBLANK;
514         } else {
515                 mxcfbi->ipu_ch = MEM_DC_SYNC;
516                 mxcfbi->blank = FB_BLANK_POWERDOWN;
517         }
518
519         mxcfbi->ipu_di = disp;
520
521         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
522         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
523         strcpy(fbi->fix.id, "DISP3 BG");
524
525         g_dp_in_use = 1;
526
527         mxcfb_info[mxcfbi->ipu_di] = fbi;
528
529         /* Need dummy values until real panel is configured */
530
531         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
532         fb_videomode_to_var(&fbi->var, mode);
533         fbi->var.bits_per_pixel = 16;
534         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
535         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
536
537         mxcfb_check_var(&fbi->var, fbi);
538
539         /* Default Y virtual size is 2x panel size */
540         fbi->var.yres_virtual = fbi->var.yres * 2;
541
542         mxcfb_set_fix(fbi);
543
544         /* allocate fb first */
545         if (mxcfb_map_video_memory(fbi) < 0)
546                 return -ENOMEM;
547
548         mxcfb_set_par(fbi);
549
550         panel.winSizeX = mode->xres;
551         panel.winSizeY = mode->yres;
552         panel.plnSizeX = mode->xres;
553         panel.plnSizeY = mode->yres;
554
555         panel.frameAdrs = (u32)fbi->screen_base;
556         panel.memSize = fbi->screen_size;
557
558         panel.gdfBytesPP = 2;
559         panel.gdfIndex = GDF_16BIT_565RGB;
560
561         ipu_dump_registers();
562
563         return 0;
564
565 err0:
566         return ret;
567 }
568
569 void ipuv3_fb_shutdown(void)
570 {
571         int i;
572         struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT;
573
574         for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) {
575                 struct fb_info *fbi = mxcfb_info[i];
576                 if (fbi) {
577                         struct mxcfb_info *mxc_fbi = fbi->par;
578                         ipu_disable_channel(mxc_fbi->ipu_ch);
579                         ipu_uninit_channel(mxc_fbi->ipu_ch);
580                 }
581         }
582         for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) {
583                 __raw_writel(__raw_readl(&stat->int_stat[i]),
584                              &stat->int_stat[i]);
585         }
586 }
587
588 void *video_hw_init(void)
589 {
590         int ret;
591
592         ret = ipu_probe();
593         if (ret)
594                 puts("Error initializing IPU\n");
595
596         ret = mxcfb_probe(gpixfmt, gdisp, gmode);
597         debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs);
598
599         return (void *)&panel;
600 }
601
602 int ipuv3_fb_init(struct fb_videomode const *mode,
603                   uint8_t disp,
604                   uint32_t pixfmt)
605 {
606         gmode = mode;
607         gdisp = disp;
608         gpixfmt = pixfmt;
609
610         return 0;
611 }