2 * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
4 * Freescale DIU Frame Buffer device driver
6 * Authors: Hongjun Chen <hong-jun.chen@freescale.com>
7 * Paul Widmer <paul.widmer@freescale.com>
8 * Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
9 * York Sun <yorksun@freescale.com>
11 * Based on imxfb.c Copyright (C) 2004 S.Hauer, Pengutronix
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/errno.h>
23 #include <linux/string.h>
24 #include <linux/slab.h>
26 #include <linux/init.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/platform_device.h>
29 #include <linux/interrupt.h>
30 #include <linux/clk.h>
31 #include <linux/uaccess.h>
32 #include <linux/vmalloc.h>
33 #include <linux/spinlock.h>
35 #include <sysdev/fsl_soc.h>
36 #include <linux/fsl-diu-fb.h>
39 #define NUM_AOIS 5 /* 1 for plane 0, 2 for planes 1 & 2 each */
41 /* HW cursor parameters */
44 /* INT_STATUS/INT_MASK field descriptions */
45 #define INT_VSYNC 0x01 /* Vsync interrupt */
46 #define INT_VSYNC_WB 0x02 /* Vsync interrupt for write back operation */
47 #define INT_UNDRUN 0x04 /* Under run exception interrupt */
48 #define INT_PARERR 0x08 /* Display parameters error interrupt */
49 #define INT_LS_BF_VS 0x10 /* Lines before vsync. interrupt */
52 * List of supported video modes
54 * The first entry is the default video mode. The remain entries are in
55 * order if increasing resolution and frequency. The 320x240-60 mode is
56 * the initial AOI for the second and third planes.
58 static struct fb_videomode fsl_diu_mode_db[] = {
70 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
71 .vmode = FB_VMODE_NONINTERLACED
84 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
85 .vmode = FB_VMODE_NONINTERLACED
98 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
99 .vmode = FB_VMODE_NONINTERLACED
112 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
113 .vmode = FB_VMODE_NONINTERLACED
126 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
127 .vmode = FB_VMODE_NONINTERLACED
140 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
141 .vmode = FB_VMODE_NONINTERLACED
154 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
155 .vmode = FB_VMODE_NONINTERLACED
168 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
169 .vmode = FB_VMODE_NONINTERLACED
182 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
183 .vmode = FB_VMODE_NONINTERLACED
196 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
197 .vmode = FB_VMODE_NONINTERLACED
210 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
211 .vmode = FB_VMODE_NONINTERLACED
224 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
225 .vmode = FB_VMODE_NONINTERLACED
238 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
239 .vmode = FB_VMODE_NONINTERLACED
252 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
253 .vmode = FB_VMODE_NONINTERLACED
266 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
267 .vmode = FB_VMODE_NONINTERLACED
280 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
281 .vmode = FB_VMODE_NONINTERLACED
294 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
295 .vmode = FB_VMODE_NONINTERLACED
308 .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
309 .vmode = FB_VMODE_NONINTERLACED
313 static char *fb_mode;
314 static unsigned long default_bpp = 32;
315 static enum fsl_diu_monitor_port monitor_port;
316 static char *monitor_string;
318 #if defined(CONFIG_NOT_COHERENT_CACHE)
319 static u8 *coherence_data;
320 static size_t coherence_data_size;
321 static unsigned int d_cache_line_size;
324 static DEFINE_SPINLOCK(diu_lock);
327 PLANE0 = 0, /* Plane 0, only one AOI that fills the screen */
328 PLANE1_AOI0, /* Plane 1, first AOI */
329 PLANE1_AOI1, /* Plane 1, second AOI */
330 PLANE2_AOI0, /* Plane 2, first AOI */
331 PLANE2_AOI1, /* Plane 2, second AOI */
335 enum mfb_index index;
338 unsigned long pseudo_palette[16];
340 unsigned char g_alpha;
342 int x_aoi_d; /* aoi display x offset to physical screen */
343 int y_aoi_d; /* aoi display y offset to physical screen */
344 struct fsl_diu_data *parent;
348 * struct fsl_diu_data - per-DIU data structure
349 * @dma_addr: DMA address of this structure
350 * @fsl_diu_info: fb_info objects, one per AOI
351 * @dev_attr: sysfs structure
353 * @monitor_port: the monitor port this DIU is connected to
354 * @diu_reg: pointer to the DIU hardware registers
355 * @reg_lock: spinlock for register access
356 * @dummy_aoi: video buffer for the 4x4 32-bit dummy AOI
357 * dummy_ad: DIU Area Descriptor for the dummy AOI
358 * @ad[]: Area Descriptors for each real AOI
359 * @gamma: gamma color table
360 * @cursor: hardware cursor data
362 * This data structure must be allocated with 32-byte alignment, so that the
363 * internal fields can be aligned properly.
365 struct fsl_diu_data {
367 struct fb_info fsl_diu_info[NUM_AOIS];
368 struct mfb_info mfb[NUM_AOIS];
369 struct device_attribute dev_attr;
371 enum fsl_diu_monitor_port monitor_port;
372 struct diu __iomem *diu_reg;
374 u8 dummy_aoi[4 * 4 * 4];
375 struct diu_ad dummy_ad __aligned(8);
376 struct diu_ad ad[NUM_AOIS] __aligned(8);
377 u8 gamma[256 * 3] __aligned(32);
378 u8 cursor[MAX_CURS * MAX_CURS * 2] __aligned(32);
379 uint8_t edid_data[EDID_LENGTH];
383 /* Determine the DMA address of a member of the fsl_diu_data structure */
384 #define DMA_ADDR(p, f) ((p)->dma_addr + offsetof(struct fsl_diu_data, f))
386 static struct mfb_info mfb_template[] = {
396 .index = PLANE1_AOI0,
405 .index = PLANE1_AOI1,
414 .index = PLANE2_AOI0,
423 .index = PLANE2_AOI1,
434 static void __attribute__ ((unused)) fsl_diu_dump(struct diu __iomem *hw)
437 pr_debug("DIU: desc=%08x,%08x,%08x, gamma=%08x pallete=%08x "
438 "cursor=%08x curs_pos=%08x diu_mode=%08x bgnd=%08x "
439 "disp_size=%08x hsyn_para=%08x vsyn_para=%08x syn_pol=%08x "
440 "thresholds=%08x int_mask=%08x plut=%08x\n",
441 hw->desc[0], hw->desc[1], hw->desc[2], hw->gamma,
442 hw->pallete, hw->cursor, hw->curs_pos, hw->diu_mode,
443 hw->bgnd, hw->disp_size, hw->hsyn_para, hw->vsyn_para,
444 hw->syn_pol, hw->thresholds, hw->int_mask, hw->plut);
450 * fsl_diu_name_to_port - convert a port name to a monitor port enum
452 * Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns
453 * the enum fsl_diu_monitor_port that corresponds to that string.
455 * For compatibility with older versions, a number ("0", "1", or "2") is also
458 * If the string is unknown, DVI is assumed.
460 * If the particular port is not supported by the platform, another port
461 * (platform-specific) is chosen instead.
463 static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s)
465 enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI;
469 if (!strict_strtoul(s, 10, &val) && (val <= 2))
470 port = (enum fsl_diu_monitor_port) val;
471 else if (strncmp(s, "lvds", 4) == 0)
472 port = FSL_DIU_PORT_LVDS;
473 else if (strncmp(s, "dlvds", 5) == 0)
474 port = FSL_DIU_PORT_DLVDS;
477 return diu_ops.valid_monitor_port(port);
481 * Workaround for failed writing desc register of planes.
482 * Needed with MPC5121 DIU rev 2.0 silicon.
484 void wr_reg_wa(u32 *reg, u32 val)
488 } while (in_be32(reg) != val);
491 static void fsl_diu_enable_panel(struct fb_info *info)
493 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
494 struct diu_ad *ad = mfbi->ad;
495 struct fsl_diu_data *data = mfbi->parent;
496 struct diu __iomem *hw = data->diu_reg;
498 switch (mfbi->index) {
500 wr_reg_wa(&hw->desc[0], ad->paddr);
503 cmfbi = &data->mfb[2];
504 if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
505 if (cmfbi->count > 0) /* AOI1 open */
507 cpu_to_le32(cmfbi->ad->paddr);
510 wr_reg_wa(&hw->desc[1], ad->paddr);
514 cmfbi = &data->mfb[4];
515 if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
516 if (cmfbi->count > 0) /* AOI1 open */
518 cpu_to_le32(cmfbi->ad->paddr);
521 wr_reg_wa(&hw->desc[2], ad->paddr);
525 pmfbi = &data->mfb[1];
527 if (hw->desc[1] == data->dummy_ad.paddr)
528 wr_reg_wa(&hw->desc[1], ad->paddr);
530 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
533 pmfbi = &data->mfb[3];
535 if (hw->desc[2] == data->dummy_ad.paddr)
536 wr_reg_wa(&hw->desc[2], ad->paddr);
537 else /* AOI0 was open */
538 pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
543 static void fsl_diu_disable_panel(struct fb_info *info)
545 struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
546 struct diu_ad *ad = mfbi->ad;
547 struct fsl_diu_data *data = mfbi->parent;
548 struct diu __iomem *hw = data->diu_reg;
550 switch (mfbi->index) {
552 wr_reg_wa(&hw->desc[0], 0);
555 cmfbi = &data->mfb[2];
556 if (cmfbi->count > 0) /* AOI1 is open */
557 wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr);
558 /* move AOI1 to the first */
559 else /* AOI1 was closed */
560 wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
564 cmfbi = &data->mfb[4];
565 if (cmfbi->count > 0) /* AOI1 is open */
566 wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr);
567 /* move AOI1 to the first */
568 else /* AOI1 was closed */
569 wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
573 pmfbi = &data->mfb[1];
574 if (hw->desc[1] != ad->paddr) {
575 /* AOI1 is not the first in the chain */
576 if (pmfbi->count > 0)
577 /* AOI0 is open, must be the first */
578 pmfbi->ad->next_ad = 0;
579 } else /* AOI1 is the first in the chain */
580 wr_reg_wa(&hw->desc[1], data->dummy_ad.paddr);
584 pmfbi = &data->mfb[3];
585 if (hw->desc[2] != ad->paddr) {
586 /* AOI1 is not the first in the chain */
587 if (pmfbi->count > 0)
588 /* AOI0 is open, must be the first */
589 pmfbi->ad->next_ad = 0;
590 } else /* AOI1 is the first in the chain */
591 wr_reg_wa(&hw->desc[2], data->dummy_ad.paddr);
597 static void enable_lcdc(struct fb_info *info)
599 struct mfb_info *mfbi = info->par;
600 struct fsl_diu_data *data = mfbi->parent;
601 struct diu __iomem *hw = data->diu_reg;
603 out_be32(&hw->diu_mode, MFB_MODE1);
606 static void disable_lcdc(struct fb_info *info)
608 struct mfb_info *mfbi = info->par;
609 struct fsl_diu_data *data = mfbi->parent;
610 struct diu __iomem *hw = data->diu_reg;
612 out_be32(&hw->diu_mode, 0);
615 static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
616 struct fb_info *info)
618 struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
619 struct fsl_diu_data *data = mfbi->parent;
620 int available_height, upper_aoi_bottom;
621 enum mfb_index index = mfbi->index;
622 int lower_aoi_is_open, upper_aoi_is_open;
623 __u32 base_plane_width, base_plane_height, upper_aoi_height;
625 base_plane_width = data->fsl_diu_info[0].var.xres;
626 base_plane_height = data->fsl_diu_info[0].var.yres;
628 if (mfbi->x_aoi_d < 0)
630 if (mfbi->y_aoi_d < 0)
634 if (mfbi->x_aoi_d != 0)
636 if (mfbi->y_aoi_d != 0)
641 lower_aoi_mfbi = data->fsl_diu_info[index+1].par;
642 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
643 if (var->xres > base_plane_width)
644 var->xres = base_plane_width;
645 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
646 mfbi->x_aoi_d = base_plane_width - var->xres;
648 if (lower_aoi_is_open)
649 available_height = lower_aoi_mfbi->y_aoi_d;
651 available_height = base_plane_height;
652 if (var->yres > available_height)
653 var->yres = available_height;
654 if ((mfbi->y_aoi_d + var->yres) > available_height)
655 mfbi->y_aoi_d = available_height - var->yres;
659 upper_aoi_mfbi = data->fsl_diu_info[index-1].par;
660 upper_aoi_height = data->fsl_diu_info[index-1].var.yres;
661 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
662 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
663 if (var->xres > base_plane_width)
664 var->xres = base_plane_width;
665 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
666 mfbi->x_aoi_d = base_plane_width - var->xres;
667 if (mfbi->y_aoi_d < 0)
669 if (upper_aoi_is_open) {
670 if (mfbi->y_aoi_d < upper_aoi_bottom)
671 mfbi->y_aoi_d = upper_aoi_bottom;
672 available_height = base_plane_height
675 available_height = base_plane_height;
676 if (var->yres > available_height)
677 var->yres = available_height;
678 if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
679 mfbi->y_aoi_d = base_plane_height - var->yres;
684 * Checks to see if the hardware supports the state requested by var passed
685 * in. This function does not alter the hardware state! If the var passed in
686 * is slightly off by what the hardware can support then we alter the var
687 * PASSED in to what we can do. If the hardware doesn't support mode change
688 * a -EINVAL will be returned by the upper layers.
690 static int fsl_diu_check_var(struct fb_var_screeninfo *var,
691 struct fb_info *info)
693 if (var->xres_virtual < var->xres)
694 var->xres_virtual = var->xres;
695 if (var->yres_virtual < var->yres)
696 var->yres_virtual = var->yres;
698 if (var->xoffset < 0)
701 if (var->yoffset < 0)
704 if (var->xoffset + info->var.xres > info->var.xres_virtual)
705 var->xoffset = info->var.xres_virtual - info->var.xres;
707 if (var->yoffset + info->var.yres > info->var.yres_virtual)
708 var->yoffset = info->var.yres_virtual - info->var.yres;
710 if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
711 (var->bits_per_pixel != 16))
712 var->bits_per_pixel = default_bpp;
714 switch (var->bits_per_pixel) {
717 var->red.offset = 11;
718 var->red.msb_right = 0;
720 var->green.length = 6;
721 var->green.offset = 5;
722 var->green.msb_right = 0;
724 var->blue.length = 5;
725 var->blue.offset = 0;
726 var->blue.msb_right = 0;
728 var->transp.length = 0;
729 var->transp.offset = 0;
730 var->transp.msb_right = 0;
735 var->red.msb_right = 0;
737 var->green.length = 8;
738 var->green.offset = 8;
739 var->green.msb_right = 0;
741 var->blue.length = 8;
742 var->blue.offset = 16;
743 var->blue.msb_right = 0;
745 var->transp.length = 0;
746 var->transp.offset = 0;
747 var->transp.msb_right = 0;
751 var->red.offset = 16;
752 var->red.msb_right = 0;
754 var->green.length = 8;
755 var->green.offset = 8;
756 var->green.msb_right = 0;
758 var->blue.length = 8;
759 var->blue.offset = 0;
760 var->blue.msb_right = 0;
762 var->transp.length = 8;
763 var->transp.offset = 24;
764 var->transp.msb_right = 0;
773 /* Copy nonstd field to/from sync for fbset usage */
774 var->sync |= var->nonstd;
775 var->nonstd |= var->sync;
777 adjust_aoi_size_position(var, info);
781 static void set_fix(struct fb_info *info)
783 struct fb_fix_screeninfo *fix = &info->fix;
784 struct fb_var_screeninfo *var = &info->var;
785 struct mfb_info *mfbi = info->par;
787 strncpy(fix->id, mfbi->id, sizeof(fix->id));
788 fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
789 fix->type = FB_TYPE_PACKED_PIXELS;
790 fix->accel = FB_ACCEL_NONE;
791 fix->visual = FB_VISUAL_TRUECOLOR;
796 static void update_lcdc(struct fb_info *info)
798 struct fb_var_screeninfo *var = &info->var;
799 struct mfb_info *mfbi = info->par;
800 struct fsl_diu_data *data = mfbi->parent;
801 struct diu __iomem *hw;
803 u8 *gamma_table_base;
809 if (diu_ops.set_monitor_port)
810 diu_ops.set_monitor_port(data->monitor_port);
811 gamma_table_base = data->gamma;
813 /* Prep for DIU init - gamma table, cursor table */
815 for (i = 0; i <= 2; i++)
816 for (j = 0; j <= 255; j++)
817 *gamma_table_base++ = j;
819 if (diu_ops.set_gamma_table)
820 diu_ops.set_gamma_table(data->monitor_port, data->gamma);
824 /* Program DIU registers */
826 out_be32(&hw->gamma, DMA_ADDR(data, gamma));
827 out_be32(&hw->cursor, DMA_ADDR(data, cursor));
829 out_be32(&hw->bgnd, 0x007F7F7F); /* Set background to grey */
830 out_be32(&hw->disp_size, (var->yres << 16) | var->xres);
832 /* Horizontal and vertical configuration register */
833 temp = var->left_margin << 22 | /* BP_H */
834 var->hsync_len << 11 | /* PW_H */
835 var->right_margin; /* FP_H */
837 out_be32(&hw->hsyn_para, temp);
839 temp = var->upper_margin << 22 | /* BP_V */
840 var->vsync_len << 11 | /* PW_V */
841 var->lower_margin; /* FP_V */
843 out_be32(&hw->vsyn_para, temp);
845 diu_ops.set_pixel_clock(var->pixclock);
847 #ifndef CONFIG_PPC_MPC512x
849 * The PLUT register is defined differently on the MPC5121 than it
850 * is on other SOCs. Unfortunately, there's no documentation that
851 * explains how it's supposed to be programmed, so for now, we leave
852 * it at the default value on the MPC5121.
854 * For other SOCs, program it for the highest priority, which will
855 * reduce the chance of underrun. Technically, we should scale the
856 * priority to match the screen resolution, but doing that properly
857 * requires delicate fine-tuning for each use-case.
859 out_be32(&hw->plut, 0x01F5F666);
866 static int map_video_memory(struct fb_info *info)
868 u32 smem_len = info->fix.line_length * info->var.yres_virtual;
871 p = alloc_pages_exact(smem_len, GFP_DMA | __GFP_ZERO);
873 dev_err(info->dev, "unable to allocate fb memory\n");
876 mutex_lock(&info->mm_lock);
877 info->screen_base = p;
878 info->fix.smem_start = virt_to_phys(info->screen_base);
879 info->fix.smem_len = smem_len;
880 mutex_unlock(&info->mm_lock);
881 info->screen_size = info->fix.smem_len;
886 static void unmap_video_memory(struct fb_info *info)
888 void *p = info->screen_base;
889 size_t l = info->fix.smem_len;
891 mutex_lock(&info->mm_lock);
892 info->screen_base = NULL;
893 info->fix.smem_start = 0;
894 info->fix.smem_len = 0;
895 mutex_unlock(&info->mm_lock);
898 free_pages_exact(p, l);
902 * Using the fb_var_screeninfo in fb_info we set the aoi of this
903 * particular framebuffer. It is a light version of fsl_diu_set_par.
905 static int fsl_diu_set_aoi(struct fb_info *info)
907 struct fb_var_screeninfo *var = &info->var;
908 struct mfb_info *mfbi = info->par;
909 struct diu_ad *ad = mfbi->ad;
911 /* AOI should not be greater than display size */
912 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
913 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
918 * fsl_diu_get_pixel_format: return the pixel format for a given color depth
920 * The pixel format is a 32-bit value that determine which bits in each
921 * pixel are to be used for each color. This is the default function used
922 * if the platform does not define its own version.
924 static u32 fsl_diu_get_pixel_format(unsigned int bits_per_pixel)
926 #define PF_BYTE_F 0x10000000
927 #define PF_ALPHA_C_MASK 0x0E000000
928 #define PF_ALPHA_C_SHIFT 25
929 #define PF_BLUE_C_MASK 0x01800000
930 #define PF_BLUE_C_SHIFT 23
931 #define PF_GREEN_C_MASK 0x00600000
932 #define PF_GREEN_C_SHIFT 21
933 #define PF_RED_C_MASK 0x00180000
934 #define PF_RED_C_SHIFT 19
935 #define PF_PALETTE 0x00040000
936 #define PF_PIXEL_S_MASK 0x00030000
937 #define PF_PIXEL_S_SHIFT 16
938 #define PF_COMP_3_MASK 0x0000F000
939 #define PF_COMP_3_SHIFT 12
940 #define PF_COMP_2_MASK 0x00000F00
941 #define PF_COMP_2_SHIFT 8
942 #define PF_COMP_1_MASK 0x000000F0
943 #define PF_COMP_1_SHIFT 4
944 #define PF_COMP_0_MASK 0x0000000F
945 #define PF_COMP_0_SHIFT 0
947 #define MAKE_PF(alpha, red, green, blue, size, c0, c1, c2, c3) \
948 cpu_to_le32(PF_BYTE_F | (alpha << PF_ALPHA_C_SHIFT) | \
949 (blue << PF_BLUE_C_SHIFT) | (green << PF_GREEN_C_SHIFT) | \
950 (red << PF_RED_C_SHIFT) | (c3 << PF_COMP_3_SHIFT) | \
951 (c2 << PF_COMP_2_SHIFT) | (c1 << PF_COMP_1_SHIFT) | \
952 (c0 << PF_COMP_0_SHIFT) | (size << PF_PIXEL_S_SHIFT))
954 switch (bits_per_pixel) {
957 return MAKE_PF(3, 2, 1, 0, 3, 8, 8, 8, 8);
960 return MAKE_PF(4, 0, 1, 2, 2, 8, 8, 8, 0);
963 return MAKE_PF(4, 2, 1, 0, 1, 5, 6, 5, 0);
965 pr_err("fsl-diu: unsupported color depth %u\n", bits_per_pixel);
971 * Using the fb_var_screeninfo in fb_info we set the resolution of this
972 * particular framebuffer. This function alters the fb_fix_screeninfo stored
973 * in fb_info. It does not alter var in fb_info since we are using that
974 * data. This means we depend on the data in var inside fb_info to be
975 * supported by the hardware. fsl_diu_check_var is always called before
976 * fsl_diu_set_par to ensure this.
978 static int fsl_diu_set_par(struct fb_info *info)
981 struct fb_var_screeninfo *var = &info->var;
982 struct mfb_info *mfbi = info->par;
983 struct fsl_diu_data *data = mfbi->parent;
984 struct diu_ad *ad = mfbi->ad;
985 struct diu __iomem *hw;
991 len = info->var.yres_virtual * info->fix.line_length;
992 /* Alloc & dealloc each time resolution/bpp change */
993 if (len != info->fix.smem_len) {
994 if (info->fix.smem_start)
995 unmap_video_memory(info);
997 /* Memory allocation for framebuffer */
998 if (map_video_memory(info)) {
999 dev_err(info->dev, "unable to allocate fb memory 1\n");
1004 if (diu_ops.get_pixel_format)
1005 ad->pix_fmt = diu_ops.get_pixel_format(data->monitor_port,
1006 var->bits_per_pixel);
1008 ad->pix_fmt = fsl_diu_get_pixel_format(var->bits_per_pixel);
1010 ad->addr = cpu_to_le32(info->fix.smem_start);
1011 ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
1012 var->xres_virtual) | mfbi->g_alpha;
1013 /* AOI should not be greater than display size */
1014 ad->aoi_size = cpu_to_le32((var->yres << 16) | var->xres);
1015 ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
1016 ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
1018 /* Disable chroma keying function */
1027 if (mfbi->index == PLANE0)
1032 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
1034 return ((val << width) + 0x7FFF - val) >> 16;
1038 * Set a single color register. The values supplied have a 16 bit magnitude
1039 * which needs to be scaled in this function for the hardware. Things to take
1040 * into consideration are how many color registers, if any, are supported with
1041 * the current color visual. With truecolor mode no color palettes are
1042 * supported. Here a pseudo palette is created which we store the value in
1043 * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
1046 static int fsl_diu_setcolreg(unsigned int regno, unsigned int red,
1047 unsigned int green, unsigned int blue,
1048 unsigned int transp, struct fb_info *info)
1053 * If greyscale is true, then we convert the RGB value
1054 * to greyscale no matter what visual we are using.
1056 if (info->var.grayscale)
1057 red = green = blue = (19595 * red + 38470 * green +
1059 switch (info->fix.visual) {
1060 case FB_VISUAL_TRUECOLOR:
1062 * 16-bit True Colour. We encode the RGB value
1063 * according to the RGB bitfield information.
1066 u32 *pal = info->pseudo_palette;
1069 red = CNVT_TOHW(red, info->var.red.length);
1070 green = CNVT_TOHW(green, info->var.green.length);
1071 blue = CNVT_TOHW(blue, info->var.blue.length);
1072 transp = CNVT_TOHW(transp, info->var.transp.length);
1074 v = (red << info->var.red.offset) |
1075 (green << info->var.green.offset) |
1076 (blue << info->var.blue.offset) |
1077 (transp << info->var.transp.offset);
1089 * Pan (or wrap, depending on the `vmode' field) the display using the
1090 * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
1091 * don't fit, return -EINVAL.
1093 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
1094 struct fb_info *info)
1096 if ((info->var.xoffset == var->xoffset) &&
1097 (info->var.yoffset == var->yoffset))
1098 return 0; /* No change, do nothing */
1100 if (var->xoffset < 0 || var->yoffset < 0
1101 || var->xoffset + info->var.xres > info->var.xres_virtual
1102 || var->yoffset + info->var.yres > info->var.yres_virtual)
1105 info->var.xoffset = var->xoffset;
1106 info->var.yoffset = var->yoffset;
1108 if (var->vmode & FB_VMODE_YWRAP)
1109 info->var.vmode |= FB_VMODE_YWRAP;
1111 info->var.vmode &= ~FB_VMODE_YWRAP;
1113 fsl_diu_set_aoi(info);
1118 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
1121 struct mfb_info *mfbi = info->par;
1122 struct diu_ad *ad = mfbi->ad;
1123 struct mfb_chroma_key ck;
1124 unsigned char global_alpha;
1125 struct aoi_display_offset aoi_d;
1127 void __user *buf = (void __user *)arg;
1132 dev_dbg(info->dev, "ioctl %08x (dir=%s%s type=%u nr=%u size=%u)\n", cmd,
1133 _IOC_DIR(cmd) & _IOC_READ ? "R" : "",
1134 _IOC_DIR(cmd) & _IOC_WRITE ? "W" : "",
1135 _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
1138 case MFB_SET_PIXFMT_OLD:
1140 "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n",
1141 MFB_SET_PIXFMT_OLD);
1142 case MFB_SET_PIXFMT:
1143 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
1145 ad->pix_fmt = pix_fmt;
1147 case MFB_GET_PIXFMT_OLD:
1149 "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n",
1150 MFB_GET_PIXFMT_OLD);
1151 case MFB_GET_PIXFMT:
1152 pix_fmt = ad->pix_fmt;
1153 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
1157 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
1159 mfbi->x_aoi_d = aoi_d.x_aoi_d;
1160 mfbi->y_aoi_d = aoi_d.y_aoi_d;
1161 fsl_diu_check_var(&info->var, info);
1162 fsl_diu_set_aoi(info);
1165 aoi_d.x_aoi_d = mfbi->x_aoi_d;
1166 aoi_d.y_aoi_d = mfbi->y_aoi_d;
1167 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
1171 global_alpha = mfbi->g_alpha;
1172 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1176 /* set panel information */
1177 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1179 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1180 (global_alpha & 0xff);
1181 mfbi->g_alpha = global_alpha;
1183 case MFB_SET_CHROMA_KEY:
1184 /* set panel winformation */
1185 if (copy_from_user(&ck, buf, sizeof(ck)))
1189 (ck.red_max < ck.red_min ||
1190 ck.green_max < ck.green_min ||
1191 ck.blue_max < ck.blue_min))
1202 ad->ckmax_r = ck.red_max;
1203 ad->ckmax_g = ck.green_max;
1204 ad->ckmax_b = ck.blue_max;
1205 ad->ckmin_r = ck.red_min;
1206 ad->ckmin_g = ck.green_min;
1207 ad->ckmin_b = ck.blue_min;
1210 #ifdef CONFIG_PPC_MPC512x
1211 case MFB_SET_GAMMA: {
1212 struct fsl_diu_data *data = mfbi->parent;
1214 if (copy_from_user(data->gamma, buf, sizeof(data->gamma)))
1216 setbits32(&data->diu_reg->gamma, 0); /* Force table reload */
1219 case MFB_GET_GAMMA: {
1220 struct fsl_diu_data *data = mfbi->parent;
1222 if (copy_to_user(buf, data->gamma, sizeof(data->gamma)))
1228 dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd);
1229 return -ENOIOCTLCMD;
1235 static inline void fsl_diu_enable_interrupts(struct fsl_diu_data *data)
1237 u32 int_mask = INT_UNDRUN; /* enable underrun detection */
1239 if (IS_ENABLED(CONFIG_NOT_COHERENT_CACHE))
1240 int_mask |= INT_VSYNC; /* enable vertical sync */
1242 clrbits32(&data->diu_reg->int_mask, int_mask);
1245 /* turn on fb if count == 1
1247 static int fsl_diu_open(struct fb_info *info, int user)
1249 struct mfb_info *mfbi = info->par;
1252 /* free boot splash memory on first /dev/fb0 open */
1253 if ((mfbi->index == PLANE0) && diu_ops.release_bootmem)
1254 diu_ops.release_bootmem();
1256 spin_lock(&diu_lock);
1258 if (mfbi->count == 1) {
1259 fsl_diu_check_var(&info->var, info);
1260 res = fsl_diu_set_par(info);
1264 fsl_diu_enable_interrupts(mfbi->parent);
1265 fsl_diu_enable_panel(info);
1269 spin_unlock(&diu_lock);
1273 /* turn off fb if count == 0
1275 static int fsl_diu_release(struct fb_info *info, int user)
1277 struct mfb_info *mfbi = info->par;
1280 spin_lock(&diu_lock);
1282 if (mfbi->count == 0) {
1283 struct fsl_diu_data *data = mfbi->parent;
1284 bool disable = true;
1287 /* Disable interrupts only if all AOIs are closed */
1288 for (i = 0; i < NUM_AOIS; i++) {
1289 struct mfb_info *mi = data->fsl_diu_info[i].par;
1295 out_be32(&data->diu_reg->int_mask, 0xffffffff);
1296 fsl_diu_disable_panel(info);
1299 spin_unlock(&diu_lock);
1303 static struct fb_ops fsl_diu_ops = {
1304 .owner = THIS_MODULE,
1305 .fb_check_var = fsl_diu_check_var,
1306 .fb_set_par = fsl_diu_set_par,
1307 .fb_setcolreg = fsl_diu_setcolreg,
1308 .fb_pan_display = fsl_diu_pan_display,
1309 .fb_fillrect = cfb_fillrect,
1310 .fb_copyarea = cfb_copyarea,
1311 .fb_imageblit = cfb_imageblit,
1312 .fb_ioctl = fsl_diu_ioctl,
1313 .fb_open = fsl_diu_open,
1314 .fb_release = fsl_diu_release,
1317 static int install_fb(struct fb_info *info)
1320 struct mfb_info *mfbi = info->par;
1321 struct fsl_diu_data *data = mfbi->parent;
1322 const char *aoi_mode, *init_aoi_mode = "320x240";
1323 struct fb_videomode *db = fsl_diu_mode_db;
1324 unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
1325 int has_default_mode = 1;
1327 info->var.activate = FB_ACTIVATE_NOW;
1328 info->fbops = &fsl_diu_ops;
1329 info->flags = FBINFO_DEFAULT | FBINFO_VIRTFB | FBINFO_PARTIAL_PAN_OK |
1331 info->pseudo_palette = mfbi->pseudo_palette;
1333 rc = fb_alloc_cmap(&info->cmap, 16, 0);
1337 if (mfbi->index == PLANE0) {
1338 if (data->has_edid) {
1339 /* Now build modedb from EDID */
1340 fb_edid_to_monspecs(data->edid_data, &info->monspecs);
1341 fb_videomode_to_modelist(info->monspecs.modedb,
1342 info->monspecs.modedb_len,
1344 db = info->monspecs.modedb;
1345 dbsize = info->monspecs.modedb_len;
1349 aoi_mode = init_aoi_mode;
1351 rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize, NULL,
1355 * For plane 0 we continue and look into
1356 * driver's internal modedb.
1358 if ((mfbi->index == PLANE0) && data->has_edid)
1359 has_default_mode = 0;
1364 if (!has_default_mode) {
1365 rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1366 ARRAY_SIZE(fsl_diu_mode_db), NULL, default_bpp);
1368 has_default_mode = 1;
1371 /* Still not found, use preferred mode from database if any */
1372 if (!has_default_mode && info->monspecs.modedb) {
1373 struct fb_monspecs *specs = &info->monspecs;
1374 struct fb_videomode *modedb = &specs->modedb[0];
1377 * Get preferred timing. If not found,
1378 * first mode in database will be used.
1380 if (specs->misc & FB_MISC_1ST_DETAIL) {
1383 for (i = 0; i < specs->modedb_len; i++) {
1384 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
1385 modedb = &specs->modedb[i];
1391 info->var.bits_per_pixel = default_bpp;
1392 fb_videomode_to_var(&info->var, modedb);
1395 if (fsl_diu_check_var(&info->var, info)) {
1396 dev_err(info->dev, "fsl_diu_check_var failed\n");
1397 unmap_video_memory(info);
1398 fb_dealloc_cmap(&info->cmap);
1402 if (register_framebuffer(info) < 0) {
1403 dev_err(info->dev, "register_framebuffer failed\n");
1404 unmap_video_memory(info);
1405 fb_dealloc_cmap(&info->cmap);
1409 mfbi->registered = 1;
1410 dev_info(info->dev, "%s registered successfully\n", mfbi->id);
1415 static void uninstall_fb(struct fb_info *info)
1417 struct mfb_info *mfbi = info->par;
1419 if (!mfbi->registered)
1422 unregister_framebuffer(info);
1423 unmap_video_memory(info);
1425 fb_dealloc_cmap(&info->cmap);
1427 mfbi->registered = 0;
1430 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1432 struct diu __iomem *hw = dev_id;
1433 uint32_t status = in_be32(&hw->int_status);
1436 /* This is the workaround for underrun */
1437 if (status & INT_UNDRUN) {
1438 out_be32(&hw->diu_mode, 0);
1440 out_be32(&hw->diu_mode, 1);
1442 #if defined(CONFIG_NOT_COHERENT_CACHE)
1443 else if (status & INT_VSYNC) {
1446 for (i = 0; i < coherence_data_size;
1447 i += d_cache_line_size)
1448 __asm__ __volatile__ (
1450 ::[input]"r"(&coherence_data[i]));
1460 * Power management hooks. Note that we won't be called from IRQ context,
1461 * unlike the blank functions above, so we may sleep.
1463 static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state)
1465 struct fsl_diu_data *data;
1467 data = dev_get_drvdata(&ofdev->dev);
1468 disable_lcdc(data->fsl_diu_info);
1473 static int fsl_diu_resume(struct platform_device *ofdev)
1475 struct fsl_diu_data *data;
1477 data = dev_get_drvdata(&ofdev->dev);
1478 enable_lcdc(data->fsl_diu_info);
1484 #define fsl_diu_suspend NULL
1485 #define fsl_diu_resume NULL
1486 #endif /* CONFIG_PM */
1488 static ssize_t store_monitor(struct device *device,
1489 struct device_attribute *attr, const char *buf, size_t count)
1491 enum fsl_diu_monitor_port old_monitor_port;
1492 struct fsl_diu_data *data =
1493 container_of(attr, struct fsl_diu_data, dev_attr);
1495 old_monitor_port = data->monitor_port;
1496 data->monitor_port = fsl_diu_name_to_port(buf);
1498 if (old_monitor_port != data->monitor_port) {
1499 /* All AOIs need adjust pixel format
1500 * fsl_diu_set_par only change the pixsel format here
1501 * unlikely to fail. */
1504 for (i=0; i < NUM_AOIS; i++)
1505 fsl_diu_set_par(&data->fsl_diu_info[i]);
1510 static ssize_t show_monitor(struct device *device,
1511 struct device_attribute *attr, char *buf)
1513 struct fsl_diu_data *data =
1514 container_of(attr, struct fsl_diu_data, dev_attr);
1516 switch (data->monitor_port) {
1517 case FSL_DIU_PORT_DVI:
1518 return sprintf(buf, "DVI\n");
1519 case FSL_DIU_PORT_LVDS:
1520 return sprintf(buf, "Single-link LVDS\n");
1521 case FSL_DIU_PORT_DLVDS:
1522 return sprintf(buf, "Dual-link LVDS\n");
1528 static int fsl_diu_probe(struct platform_device *pdev)
1530 struct device_node *np = pdev->dev.of_node;
1531 struct mfb_info *mfbi;
1532 struct fsl_diu_data *data;
1533 dma_addr_t dma_addr; /* DMA addr of fsl_diu_data struct */
1538 data = dmam_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data),
1539 &dma_addr, GFP_DMA | __GFP_ZERO);
1542 data->dma_addr = dma_addr;
1545 * dma_alloc_coherent() uses a page allocator, so the address is
1546 * always page-aligned. We need the memory to be 32-byte aligned,
1547 * so that's good. However, if one day the allocator changes, we
1548 * need to catch that. It's not worth the effort to handle unaligned
1549 * alloctions now because it's highly unlikely to ever be a problem.
1551 if ((unsigned long)data & 31) {
1552 dev_err(&pdev->dev, "misaligned allocation");
1557 spin_lock_init(&data->reg_lock);
1559 for (i = 0; i < NUM_AOIS; i++) {
1560 struct fb_info *info = &data->fsl_diu_info[i];
1562 info->device = &pdev->dev;
1563 info->par = &data->mfb[i];
1566 * We store the physical address of the AD in the reserved
1567 * 'paddr' field of the AD itself.
1569 data->ad[i].paddr = DMA_ADDR(data, ad[i]);
1571 info->fix.smem_start = 0;
1573 /* Initialize the AOI data structure */
1575 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
1576 mfbi->parent = data;
1577 mfbi->ad = &data->ad[i];
1580 /* Get the EDID data from the device tree, if present */
1581 prop = of_get_property(np, "edid", &ret);
1582 if (prop && ret == EDID_LENGTH) {
1583 memcpy(data->edid_data, prop, EDID_LENGTH);
1584 data->has_edid = true;
1587 data->diu_reg = of_iomap(np, 0);
1588 if (!data->diu_reg) {
1589 dev_err(&pdev->dev, "cannot map DIU registers\n");
1594 /* Get the IRQ of the DIU */
1595 data->irq = irq_of_parse_and_map(np, 0);
1598 dev_err(&pdev->dev, "could not get DIU IRQ\n");
1602 data->monitor_port = monitor_port;
1604 /* Initialize the dummy Area Descriptor */
1605 data->dummy_ad.addr = cpu_to_le32(DMA_ADDR(data, dummy_aoi));
1606 data->dummy_ad.pix_fmt = 0x88882317;
1607 data->dummy_ad.src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1608 data->dummy_ad.aoi_size = cpu_to_le32((4 << 16) | 2);
1609 data->dummy_ad.offset_xyi = 0;
1610 data->dummy_ad.offset_xyd = 0;
1611 data->dummy_ad.next_ad = 0;
1612 data->dummy_ad.paddr = DMA_ADDR(data, dummy_ad);
1615 * Let DIU continue to display splash screen if it was pre-initialized
1616 * by the bootloader; otherwise, clear the display.
1618 if (in_be32(&data->diu_reg->diu_mode) == MFB_MODE0)
1619 out_be32(&data->diu_reg->desc[0], 0);
1621 out_be32(&data->diu_reg->desc[1], data->dummy_ad.paddr);
1622 out_be32(&data->diu_reg->desc[2], data->dummy_ad.paddr);
1625 * Older versions of U-Boot leave interrupts enabled, so disable
1626 * all of them and clear the status register.
1628 out_be32(&data->diu_reg->int_mask, 0xffffffff);
1629 in_be32(&data->diu_reg->int_status);
1631 ret = request_irq(data->irq, fsl_diu_isr, 0, "fsl-diu-fb",
1634 dev_err(&pdev->dev, "could not claim irq\n");
1638 for (i = 0; i < NUM_AOIS; i++) {
1639 ret = install_fb(&data->fsl_diu_info[i]);
1641 dev_err(&pdev->dev, "could not register fb %d\n", i);
1642 free_irq(data->irq, data->diu_reg);
1647 sysfs_attr_init(&data->dev_attr.attr);
1648 data->dev_attr.attr.name = "monitor";
1649 data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1650 data->dev_attr.show = show_monitor;
1651 data->dev_attr.store = store_monitor;
1652 ret = device_create_file(&pdev->dev, &data->dev_attr);
1654 dev_err(&pdev->dev, "could not create sysfs file %s\n",
1655 data->dev_attr.attr.name);
1658 dev_set_drvdata(&pdev->dev, data);
1662 for (i = 0; i < NUM_AOIS; i++)
1663 uninstall_fb(&data->fsl_diu_info[i]);
1665 iounmap(data->diu_reg);
1670 static int fsl_diu_remove(struct platform_device *pdev)
1672 struct fsl_diu_data *data;
1675 data = dev_get_drvdata(&pdev->dev);
1676 disable_lcdc(&data->fsl_diu_info[0]);
1678 free_irq(data->irq, data->diu_reg);
1680 for (i = 0; i < NUM_AOIS; i++)
1681 uninstall_fb(&data->fsl_diu_info[i]);
1683 iounmap(data->diu_reg);
1689 static int __init fsl_diu_setup(char *options)
1694 if (!options || !*options)
1697 while ((opt = strsep(&options, ",")) != NULL) {
1700 if (!strncmp(opt, "monitor=", 8)) {
1701 monitor_port = fsl_diu_name_to_port(opt + 8);
1702 } else if (!strncmp(opt, "bpp=", 4)) {
1703 if (!strict_strtoul(opt + 4, 10, &val))
1713 static struct of_device_id fsl_diu_match[] = {
1714 #ifdef CONFIG_PPC_MPC512x
1716 .compatible = "fsl,mpc5121-diu",
1720 .compatible = "fsl,diu",
1724 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1726 static struct platform_driver fsl_diu_driver = {
1728 .name = "fsl-diu-fb",
1729 .owner = THIS_MODULE,
1730 .of_match_table = fsl_diu_match,
1732 .probe = fsl_diu_probe,
1733 .remove = fsl_diu_remove,
1734 .suspend = fsl_diu_suspend,
1735 .resume = fsl_diu_resume,
1738 static int __init fsl_diu_init(void)
1740 #ifdef CONFIG_NOT_COHERENT_CACHE
1741 struct device_node *np;
1749 * For kernel boot options (in 'video=xxxfb:<options>' format)
1751 if (fb_get_options("fslfb", &option))
1753 fsl_diu_setup(option);
1755 monitor_port = fsl_diu_name_to_port(monitor_string);
1757 pr_info("Freescale Display Interface Unit (DIU) framebuffer driver\n");
1759 #ifdef CONFIG_NOT_COHERENT_CACHE
1760 np = of_find_node_by_type(NULL, "cpu");
1762 pr_err("fsl-diu-fb: can't find 'cpu' device node\n");
1766 prop = of_get_property(np, "d-cache-size", NULL);
1768 pr_err("fsl-diu-fb: missing 'd-cache-size' property' "
1775 * Freescale PLRU requires 13/8 times the cache size to do a proper
1776 * displacement flush
1778 coherence_data_size = be32_to_cpup(prop) * 13;
1779 coherence_data_size /= 8;
1781 pr_debug("fsl-diu-fb: coherence data size is %zu bytes\n",
1782 coherence_data_size);
1784 prop = of_get_property(np, "d-cache-line-size", NULL);
1786 pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' "
1791 d_cache_line_size = be32_to_cpup(prop);
1793 pr_debug("fsl-diu-fb: cache lines size is %u bytes\n",
1797 coherence_data = vmalloc(coherence_data_size);
1798 if (!coherence_data) {
1799 pr_err("fsl-diu-fb: could not allocate coherence data "
1800 "(size=%zu)\n", coherence_data_size);
1806 ret = platform_driver_register(&fsl_diu_driver);
1808 pr_err("fsl-diu-fb: failed to register platform driver\n");
1809 #if defined(CONFIG_NOT_COHERENT_CACHE)
1810 vfree(coherence_data);
1816 static void __exit fsl_diu_exit(void)
1818 platform_driver_unregister(&fsl_diu_driver);
1819 #if defined(CONFIG_NOT_COHERENT_CACHE)
1820 vfree(coherence_data);
1824 module_init(fsl_diu_init);
1825 module_exit(fsl_diu_exit);
1827 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
1828 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
1829 MODULE_LICENSE("GPL");
1831 module_param_named(mode, fb_mode, charp, 0);
1832 MODULE_PARM_DESC(mode,
1833 "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
1834 module_param_named(bpp, default_bpp, ulong, 0);
1835 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified in 'mode'");
1836 module_param_named(monitor, monitor_string, charp, 0);
1837 MODULE_PARM_DESC(monitor, "Specify the monitor port "
1838 "(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform");