5 * Stefano Babic, DENX Software Engineering, sbabic@denx.de
7 * MX51 Linux framebuffer:
9 * (C) Copyright 2004-2010 Freescale Semiconductor, Inc.
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <asm/errno.h>
32 #include <linux/string.h>
33 #include <linux/list.h>
38 #include "videomodes.h"
43 static int mxcfb_map_video_memory(struct fb_info *fbi);
44 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
47 static GraphicDevice panel;
48 static struct fb_videomode const *gmode;
50 static uint32_t gpixfmt;
52 void fb_videomode_to_var(struct fb_var_screeninfo *var,
53 const struct fb_videomode *mode)
55 var->xres = mode->xres;
56 var->yres = mode->yres;
57 var->xres_virtual = mode->xres;
58 var->yres_virtual = mode->yres;
61 var->pixclock = mode->pixclock;
62 var->left_margin = mode->left_margin;
63 var->right_margin = mode->right_margin;
64 var->upper_margin = mode->upper_margin;
65 var->lower_margin = mode->lower_margin;
66 var->hsync_len = mode->hsync_len;
67 var->vsync_len = mode->vsync_len;
68 var->sync = mode->sync;
69 var->vmode = mode->vmode & FB_VMODE_MASK;
73 * Structure containing the MXC specific framebuffer information.
80 unsigned char overlay;
81 unsigned char alpha_chan_en;
82 dma_addr_t alpha_phy_addr0;
83 dma_addr_t alpha_phy_addr1;
84 void *alpha_virt_addr0;
85 void *alpha_virt_addr1;
86 uint32_t alpha_mem_len;
88 uint32_t cur_ipu_alpha_buf;
90 u32 pseudo_palette[16];
100 static unsigned long default_bpp = 16;
101 static unsigned char g_dp_in_use;
102 static struct fb_info *mxcfb_info[3];
103 static int ext_clk_used;
105 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
109 debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
112 return fbi->var.nonstd;
114 switch (fbi->var.bits_per_pixel) {
116 pixfmt = IPU_PIX_FMT_BGR24;
119 pixfmt = IPU_PIX_FMT_BGR32;
122 pixfmt = IPU_PIX_FMT_RGB565;
129 * Set fixed framebuffer parameters based on variable settings.
131 * @param info framebuffer information pointer
133 static int mxcfb_set_fix(struct fb_info *info)
135 struct fb_fix_screeninfo *fix = &info->fix;
136 struct fb_var_screeninfo *var = &info->var;
138 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
140 fix->type = FB_TYPE_PACKED_PIXELS;
141 fix->accel = FB_ACCEL_NONE;
142 fix->visual = FB_VISUAL_TRUECOLOR;
149 static int setup_disp_channel1(struct fb_info *fbi)
151 ipu_channel_params_t params;
152 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
154 memset(¶ms, 0, sizeof(params));
155 params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
157 debug("%s called\n", __func__);
159 * Assuming interlaced means yuv output, below setting also
160 * valid for mem_dc_sync. FG should have the same vmode as BG.
162 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
163 params.mem_dp_bg_sync.interlaced = 1;
164 params.mem_dp_bg_sync.out_pixel_fmt =
167 if (mxc_fbi->ipu_di_pix_fmt) {
168 params.mem_dp_bg_sync.out_pixel_fmt =
169 mxc_fbi->ipu_di_pix_fmt;
171 params.mem_dp_bg_sync.out_pixel_fmt =
175 params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
176 if (mxc_fbi->alpha_chan_en)
177 params.mem_dp_bg_sync.alpha_chan_en = 1;
179 ipu_init_channel(mxc_fbi->ipu_ch, ¶ms);
184 static int setup_disp_channel2(struct fb_info *fbi)
187 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
189 mxc_fbi->cur_ipu_buf = 1;
190 if (mxc_fbi->alpha_chan_en)
191 mxc_fbi->cur_ipu_alpha_buf = 1;
193 fbi->var.xoffset = fbi->var.yoffset = 0;
195 debug("%s: %x %d %d %d %lx %lx\n",
200 fbi->fix.line_length,
202 fbi->fix.smem_start +
203 (fbi->fix.line_length * fbi->var.yres));
205 retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
207 fbi->var.xres, fbi->var.yres,
208 fbi->fix.line_length,
209 fbi->fix.smem_start +
210 (fbi->fix.line_length * fbi->var.yres),
214 printf("ipu_init_channel_buffer error %d\n", retval);
220 * Set framebuffer parameters and change the operating mode.
222 * @param info framebuffer information pointer
224 static int mxcfb_set_par(struct fb_info *fbi)
228 ipu_di_signal_cfg_t sig_cfg;
229 struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
230 uint32_t out_pixel_fmt;
232 ipu_disable_channel(mxc_fbi->ipu_ch);
233 ipu_uninit_channel(mxc_fbi->ipu_ch);
236 mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
237 if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
238 if (fbi->fix.smem_start)
239 mxcfb_unmap_video_memory(fbi);
241 if (mxcfb_map_video_memory(fbi) < 0)
245 setup_disp_channel1(fbi);
247 memset(&sig_cfg, 0, sizeof(sig_cfg));
248 if (fbi->var.vmode & FB_VMODE_INTERLACED) {
249 sig_cfg.interlaced = 1;
250 out_pixel_fmt = IPU_PIX_FMT_YUV444;
252 if (mxc_fbi->ipu_di_pix_fmt)
253 out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
255 out_pixel_fmt = IPU_PIX_FMT_RGB666;
257 if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
258 sig_cfg.odd_field_first = 1;
259 if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
261 if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
262 sig_cfg.Hsync_pol = 1;
263 if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
264 sig_cfg.Vsync_pol = 1;
265 if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
267 if (fbi->var.sync & FB_SYNC_DATA_INVERT)
268 sig_cfg.data_pol = 1;
269 if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
270 sig_cfg.enable_pol = 1;
271 if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
272 sig_cfg.clkidle_en = 1;
274 debug("pixclock = %ul Hz\n",
275 (u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
277 if (ipu_init_sync_panel(mxc_fbi->ipu_di,
278 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
279 fbi->var.xres, fbi->var.yres,
281 fbi->var.left_margin,
283 fbi->var.right_margin,
284 fbi->var.upper_margin,
286 fbi->var.lower_margin,
288 puts("mxcfb: Error initializing panel.\n");
292 retval = setup_disp_channel2(fbi);
296 if (mxc_fbi->blank == FB_BLANK_UNBLANK)
297 ipu_enable_channel(mxc_fbi->ipu_ch);
303 * Check framebuffer variable parameters and adjust to valid values.
305 * @param var framebuffer variable parameters
307 * @param info framebuffer information pointer
309 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
314 if (var->xres_virtual < var->xres)
315 var->xres_virtual = var->xres;
316 if (var->yres_virtual < var->yres)
317 var->yres_virtual = var->yres;
319 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
320 (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
321 var->bits_per_pixel = default_bpp;
323 switch (var->bits_per_pixel) {
327 var->red.msb_right = 0;
329 var->green.length = 3;
330 var->green.offset = 2;
331 var->green.msb_right = 0;
333 var->blue.length = 2;
334 var->blue.offset = 0;
335 var->blue.msb_right = 0;
337 var->transp.length = 0;
338 var->transp.offset = 0;
339 var->transp.msb_right = 0;
343 var->red.offset = 11;
344 var->red.msb_right = 0;
346 var->green.length = 6;
347 var->green.offset = 5;
348 var->green.msb_right = 0;
350 var->blue.length = 5;
351 var->blue.offset = 0;
352 var->blue.msb_right = 0;
354 var->transp.length = 0;
355 var->transp.offset = 0;
356 var->transp.msb_right = 0;
360 var->red.offset = 16;
361 var->red.msb_right = 0;
363 var->green.length = 8;
364 var->green.offset = 8;
365 var->green.msb_right = 0;
367 var->blue.length = 8;
368 var->blue.offset = 0;
369 var->blue.msb_right = 0;
371 var->transp.length = 0;
372 var->transp.offset = 0;
373 var->transp.msb_right = 0;
377 var->red.offset = 16;
378 var->red.msb_right = 0;
380 var->green.length = 8;
381 var->green.offset = 8;
382 var->green.msb_right = 0;
384 var->blue.length = 8;
385 var->blue.offset = 0;
386 var->blue.msb_right = 0;
388 var->transp.length = 8;
389 var->transp.offset = 24;
390 var->transp.msb_right = 0;
394 if (var->pixclock < 1000) {
395 htotal = var->xres + var->right_margin + var->hsync_len +
397 vtotal = var->yres + var->lower_margin + var->vsync_len +
399 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
400 var->pixclock = KHZ2PICOS(var->pixclock);
401 printf("pixclock set for 60Hz refresh = %u ps\n",
412 static int mxcfb_map_video_memory(struct fb_info *fbi)
414 if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
415 fbi->fix.smem_len = fbi->var.yres_virtual *
416 fbi->fix.line_length;
418 fbi->fix.smem_len = roundup(fbi->fix.smem_len, ARCH_DMA_MINALIGN);
419 fbi->screen_base = (char *)memalign(ARCH_DMA_MINALIGN,
421 fbi->fix.smem_start = (unsigned long)fbi->screen_base;
422 if (fbi->screen_base == 0) {
423 puts("Unable to allocate framebuffer memory\n");
424 fbi->fix.smem_len = 0;
425 fbi->fix.smem_start = 0;
429 debug("allocated fb @ paddr=0x%08X, size=%d.\n",
430 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
432 fbi->screen_size = fbi->fix.smem_len;
434 /* Clear the screen */
435 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
440 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
442 fbi->screen_base = 0;
443 fbi->fix.smem_start = 0;
444 fbi->fix.smem_len = 0;
449 * Initializes the framebuffer information pointer. After allocating
450 * sufficient memory for the framebuffer structure, the fields are
451 * filled with custom information passed in from the configurable
452 * structures. This includes information such as bits per pixel,
453 * color maps, screen width/height and RGBA offsets.
455 * @return Framebuffer structure initialized with our information
457 static struct fb_info *mxcfb_init_fbinfo(void)
459 #define BYTES_PER_LONG 4
460 #define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
462 struct mxcfb_info *mxcfbi;
464 int size = sizeof(struct mxcfb_info) + PADDING +
465 sizeof(struct fb_info);
467 debug("%s: %d %d %d %d\n",
471 sizeof(struct mxcfb_info),
472 sizeof(struct fb_info));
474 * Allocate sufficient memory for the fb structure
483 fbi = (struct fb_info *)p;
484 fbi->par = p + sizeof(struct fb_info) + PADDING;
486 mxcfbi = (struct mxcfb_info *)fbi->par;
487 debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
488 (unsigned int)fbi, (unsigned int)mxcfbi);
490 fbi->var.activate = FB_ACTIVATE_NOW;
492 fbi->flags = FBINFO_FLAG_DEFAULT;
493 fbi->pseudo_palette = mxcfbi->pseudo_palette;
499 * Probe routine for the framebuffer driver. It is called during the
500 * driver binding process. The following functions are performed in
501 * this routine: Framebuffer initialization, Memory allocation and
502 * mapping, Framebuffer registration, IPU initialization.
504 * @return Appropriate error code to the kernel common code
506 static int mxcfb_probe(u32 interface_pix_fmt, uint8_t disp,
507 struct fb_videomode const *mode)
510 struct mxcfb_info *mxcfbi;
514 * Initialize FB structures
516 fbi = mxcfb_init_fbinfo();
521 mxcfbi = (struct mxcfb_info *)fbi->par;
524 mxcfbi->ipu_ch = MEM_BG_SYNC;
525 mxcfbi->blank = FB_BLANK_UNBLANK;
527 mxcfbi->ipu_ch = MEM_DC_SYNC;
528 mxcfbi->blank = FB_BLANK_POWERDOWN;
531 mxcfbi->ipu_di = disp;
533 ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
534 ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
535 strcpy(fbi->fix.id, "DISP3 BG");
539 mxcfb_info[mxcfbi->ipu_di] = fbi;
541 /* Need dummy values until real panel is configured */
543 mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
544 fb_videomode_to_var(&fbi->var, mode);
545 fbi->var.bits_per_pixel = 16;
546 fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
547 fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
549 mxcfb_check_var(&fbi->var, fbi);
551 /* Default Y virtual size is 2x panel size */
552 fbi->var.yres_virtual = fbi->var.yres * 2;
556 /* alocate fb first */
557 if (mxcfb_map_video_memory(fbi) < 0)
562 panel.winSizeX = mode->xres;
563 panel.winSizeY = mode->yres;
564 panel.plnSizeX = mode->xres;
565 panel.plnSizeY = mode->yres;
567 panel.frameAdrs = (u32)fbi->screen_base;
568 panel.memSize = fbi->screen_size;
570 panel.gdfBytesPP = 2;
571 panel.gdfIndex = GDF_16BIT_565RGB;
573 ipu_dump_registers();
581 void ipuv3_fb_shutdown(void)
584 struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT;
586 for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) {
587 struct fb_info *fbi = mxcfb_info[i];
589 struct mxcfb_info *mxc_fbi = fbi->par;
590 ipu_disable_channel(mxc_fbi->ipu_ch);
591 ipu_uninit_channel(mxc_fbi->ipu_ch);
594 for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) {
595 __raw_writel(__raw_readl(&stat->int_stat[i]),
600 void *video_hw_init(void)
606 puts("Error initializing IPU\n");
608 ret = mxcfb_probe(gpixfmt, gdisp, gmode);
609 debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs);
611 return (void *)&panel;
614 void video_set_lut(unsigned int index, /* color number */
615 unsigned char r, /* red */
616 unsigned char g, /* green */
617 unsigned char b /* blue */
623 int ipuv3_fb_init(struct fb_videomode const *mode,