--- /dev/null
+/*
+ * Copyright 2014 Freescale Semiconductor, Inc.
+ *
+ * FSL DCU Framebuffer driver
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <asm/io.h>
+#include <common.h>
+#include <fsl_dcu_fb.h>
+#include <linux/fb.h>
+#include <malloc.h>
+#include <video_fb.h>
+#include "videomodes.h"
+
+/* Convert the X,Y resolution pair into a single number */
+#define RESOLUTION(x, y) (((u32)(x) << 16) | (y))
+
+#ifdef CONFIG_SYS_FSL_DCU_LE
+#define dcu_read32 in_le32
+#define dcu_write32 out_le32
+#elif defined(CONFIG_SYS_FSL_DCU_BE)
+#define dcu_read32 in_be32
+#define dcu_write32 out_be32
+#endif
+
+#define DCU_MODE_BLEND_ITER(x) ((x) << 20)
+#define DCU_MODE_RASTER_EN (1 << 14)
+#define DCU_MODE_NORMAL 1
+#define DCU_MODE_COLORBAR 3
+#define DCU_BGND_R(x) ((x) << 16)
+#define DCU_BGND_G(x) ((x) << 8)
+#define DCU_BGND_B(x) (x)
+#define DCU_DISP_SIZE_DELTA_Y(x) ((x) << 16)
+#define DCU_DISP_SIZE_DELTA_X(x) (x)
+#define DCU_HSYN_PARA_BP(x) ((x) << 22)
+#define DCU_HSYN_PARA_PW(x) ((x) << 11)
+#define DCU_HSYN_PARA_FP(x) (x)
+#define DCU_VSYN_PARA_BP(x) ((x) << 22)
+#define DCU_VSYN_PARA_PW(x) ((x) << 11)
+#define DCU_VSYN_PARA_FP(x) (x)
+#define DCU_SYN_POL_INV_PXCK_FALL (0 << 6)
+#define DCU_SYN_POL_NEG_REMAIN (0 << 5)
+#define DCU_SYN_POL_INV_VS_LOW (1 << 1)
+#define DCU_SYN_POL_INV_HS_LOW (1)
+#define DCU_THRESHOLD_LS_BF_VS(x) ((x) << 16)
+#define DCU_THRESHOLD_OUT_BUF_HIGH(x) ((x) << 8)
+#define DCU_THRESHOLD_OUT_BUF_LOW(x) (x)
+#define DCU_UPDATE_MODE_MODE (1 << 31)
+#define DCU_UPDATE_MODE_READREG (1 << 30)
+
+#define DCU_CTRLDESCLN_1_HEIGHT(x) ((x) << 16)
+#define DCU_CTRLDESCLN_1_WIDTH(x) (x)
+#define DCU_CTRLDESCLN_2_POSY(x) ((x) << 16)
+#define DCU_CTRLDESCLN_2_POSX(x) (x)
+#define DCU_CTRLDESCLN_4_EN (1 << 31)
+#define DCU_CTRLDESCLN_4_TILE_EN (1 << 30)
+#define DCU_CTRLDESCLN_4_DATA_SEL_CLUT (1 << 29)
+#define DCU_CTRLDESCLN_4_SAFETY_EN (1 << 28)
+#define DCU_CTRLDESCLN_4_TRANS(x) ((x) << 20)
+#define DCU_CTRLDESCLN_4_BPP(x) ((x) << 16)
+#define DCU_CTRLDESCLN_4_RLE_EN (1 << 15)
+#define DCU_CTRLDESCLN_4_LUOFFS(x) ((x) << 4)
+#define DCU_CTRLDESCLN_4_BB_ON (1 << 2)
+#define DCU_CTRLDESCLN_4_AB(x) (x)
+#define DCU_CTRLDESCLN_5_CKMAX_R(x) ((x) << 16)
+#define DCU_CTRLDESCLN_5_CKMAX_G(x) ((x) << 8)
+#define DCU_CTRLDESCLN_5_CKMAX_B(x) (x)
+#define DCU_CTRLDESCLN_6_CKMIN_R(x) ((x) << 16)
+#define DCU_CTRLDESCLN_6_CKMIN_G(x) ((x) << 8)
+#define DCU_CTRLDESCLN_6_CKMIN_B(x) (x)
+#define DCU_CTRLDESCLN_7_TILE_VER(x) ((x) << 16)
+#define DCU_CTRLDESCLN_7_TILE_HOR(x) (x)
+#define DCU_CTRLDESCLN_8_FG_FCOLOR(x) (x)
+#define DCU_CTRLDESCLN_9_BG_BCOLOR(x) (x)
+
+#define BPP_16_RGB565 4
+#define BPP_24_RGB888 5
+#define BPP_32_ARGB8888 6
+
+/*
+ * This setting is used for the TWR_LCD_RGB card
+ */
+static struct fb_videomode fsl_dcu_mode_480_272 = {
+ .name = "480x272-60",
+ .refresh = 60,
+ .xres = 480,
+ .yres = 272,
+ .pixclock = 91996,
+ .left_margin = 2,
+ .right_margin = 2,
+ .upper_margin = 1,
+ .lower_margin = 1,
+ .hsync_len = 41,
+ .vsync_len = 2,
+ .sync = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+ .vmode = FB_VMODE_NONINTERLACED
+};
+
+/*
+ * This setting is used for Siliconimage SiI9022A HDMI
+ */
+static struct fb_videomode fsl_dcu_mode_640_480 = {
+ .name = "640x480-60",
+ .refresh = 60,
+ .xres = 640,
+ .yres = 480,
+ .pixclock = 39722,
+ .left_margin = 48,
+ .right_margin = 16,
+ .upper_margin = 33,
+ .lower_margin = 10,
+ .hsync_len = 96,
+ .vsync_len = 2,
+ .sync = 0,
+ .vmode = FB_VMODE_NONINTERLACED,
+};
+
+/*
+ * DCU register map
+ */
+struct dcu_reg {
+ u32 desc_cursor[4];
+ u32 mode;
+ u32 bgnd;
+ u32 disp_size;
+ u32 hsyn_para;
+ u32 vsyn_para;
+ u32 synpol;
+ u32 threshold;
+ u32 int_status;
+ u32 int_mask;
+ u32 colbar[8];
+ u32 div_ratio;
+ u32 sign_calc[2];
+ u32 crc_val;
+ u8 res_064[0x6c-0x64];
+ u32 parr_err_status1;
+ u8 res_070[0x7c-0x70];
+ u32 parr_err_status3;
+ u32 mparr_err_status1;
+ u8 res_084[0x90-0x84];
+ u32 mparr_err_status3;
+ u32 threshold_inp_buf[2];
+ u8 res_09c[0xa0-0x9c];
+ u32 luma_comp;
+ u32 chroma_red;
+ u32 chroma_green;
+ u32 chroma_blue;
+ u32 crc_pos;
+ u32 lyr_intpol_en;
+ u32 lyr_luma_comp;
+ u32 lyr_chrm_red;
+ u32 lyr_chrm_grn;
+ u32 lyr_chrm_blue;
+ u8 res_0c4[0xcc-0xc8];
+ u32 update_mode;
+ u32 underrun;
+ u8 res_0d4[0x100-0xd4];
+ u32 gpr;
+ u32 slr_l[2];
+ u32 slr_disp_size;
+ u32 slr_hvsync_para;
+ u32 slr_pol;
+ u32 slr_l_transp[2];
+ u8 res_120[0x200-0x120];
+ u32 ctrldescl[DCU_LAYER_MAX_NUM][16];
+};
+
+static struct fb_info info;
+
+static void reset_total_layers(void)
+{
+ struct dcu_reg *regs = (struct dcu_reg *)CONFIG_SYS_DCU_ADDR;
+ int i;
+
+ for (i = 0; i < DCU_LAYER_MAX_NUM; i++) {
+ dcu_write32(®s->ctrldescl[i][0], 0);
+ dcu_write32(®s->ctrldescl[i][1], 0);
+ dcu_write32(®s->ctrldescl[i][2], 0);
+ dcu_write32(®s->ctrldescl[i][3], 0);
+ dcu_write32(®s->ctrldescl[i][4], 0);
+ dcu_write32(®s->ctrldescl[i][5], 0);
+ dcu_write32(®s->ctrldescl[i][6], 0);
+ dcu_write32(®s->ctrldescl[i][7], 0);
+ dcu_write32(®s->ctrldescl[i][8], 0);
+ dcu_write32(®s->ctrldescl[i][9], 0);
+ dcu_write32(®s->ctrldescl[i][10], 0);
+ }
+
+ dcu_write32(®s->update_mode, DCU_UPDATE_MODE_READREG);
+}
+
+static int layer_ctrldesc_init(int index, u32 pixel_format)
+{
+ struct dcu_reg *regs = (struct dcu_reg *)CONFIG_SYS_DCU_ADDR;
+ unsigned int bpp = BPP_24_RGB888;
+
+ dcu_write32(®s->ctrldescl[index][0],
+ DCU_CTRLDESCLN_1_HEIGHT(info.var.yres) |
+ DCU_CTRLDESCLN_1_WIDTH(info.var.xres));
+
+ dcu_write32(®s->ctrldescl[index][1],
+ DCU_CTRLDESCLN_2_POSY(0) |
+ DCU_CTRLDESCLN_2_POSX(0));
+
+ dcu_write32(®s->ctrldescl[index][2], (unsigned int)info.screen_base);
+
+ switch (pixel_format) {
+ case 16:
+ bpp = BPP_16_RGB565;
+ break;
+ case 24:
+ bpp = BPP_24_RGB888;
+ break;
+ case 32:
+ bpp = BPP_32_ARGB8888;
+ break;
+ default:
+ printf("unsupported color depth: %u\n", pixel_format);
+ }
+
+ dcu_write32(®s->ctrldescl[index][3],
+ DCU_CTRLDESCLN_4_EN |
+ DCU_CTRLDESCLN_4_TRANS(0xff) |
+ DCU_CTRLDESCLN_4_BPP(bpp) |
+ DCU_CTRLDESCLN_4_AB(0));
+
+ dcu_write32(®s->ctrldescl[index][4],
+ DCU_CTRLDESCLN_5_CKMAX_R(0xff) |
+ DCU_CTRLDESCLN_5_CKMAX_G(0xff) |
+ DCU_CTRLDESCLN_5_CKMAX_B(0xff));
+ dcu_write32(®s->ctrldescl[index][5],
+ DCU_CTRLDESCLN_6_CKMIN_R(0) |
+ DCU_CTRLDESCLN_6_CKMIN_G(0) |
+ DCU_CTRLDESCLN_6_CKMIN_B(0));
+
+ dcu_write32(®s->ctrldescl[index][6],
+ DCU_CTRLDESCLN_7_TILE_VER(0) |
+ DCU_CTRLDESCLN_7_TILE_HOR(0));
+
+ dcu_write32(®s->ctrldescl[index][7], DCU_CTRLDESCLN_8_FG_FCOLOR(0));
+ dcu_write32(®s->ctrldescl[index][8], DCU_CTRLDESCLN_9_BG_BCOLOR(0));
+
+ dcu_write32(®s->update_mode, DCU_UPDATE_MODE_READREG);
+
+ return 0;
+}
+
+int fsl_dcu_init(unsigned int xres, unsigned int yres,
+ unsigned int pixel_format)
+{
+ struct dcu_reg *regs = (struct dcu_reg *)CONFIG_SYS_DCU_ADDR;
+ unsigned int div, mode;
+
+ /* Memory allocation for framebuffer */
+ info.screen_size =
+ info.var.xres * info.var.yres * (info.var.bits_per_pixel / 8);
+ info.screen_base = (char *)memalign(ARCH_DMA_MINALIGN,
+ roundup(info.screen_size, ARCH_DMA_MINALIGN));
+ memset(info.screen_base, 0, info.screen_size);
+
+ reset_total_layers();
+ div = dcu_set_pixel_clock(info.var.pixclock);
+ dcu_write32(®s->div_ratio, (div - 1));
+
+ dcu_write32(®s->disp_size,
+ DCU_DISP_SIZE_DELTA_Y(info.var.yres) |
+ DCU_DISP_SIZE_DELTA_X(info.var.xres / 16));
+
+ dcu_write32(®s->hsyn_para,
+ DCU_HSYN_PARA_BP(info.var.left_margin) |
+ DCU_HSYN_PARA_PW(info.var.hsync_len) |
+ DCU_HSYN_PARA_FP(info.var.right_margin));
+
+ dcu_write32(®s->vsyn_para,
+ DCU_VSYN_PARA_BP(info.var.upper_margin) |
+ DCU_VSYN_PARA_PW(info.var.vsync_len) |
+ DCU_VSYN_PARA_FP(info.var.lower_margin));
+
+ dcu_write32(®s->synpol,
+ DCU_SYN_POL_INV_PXCK_FALL |
+ DCU_SYN_POL_NEG_REMAIN |
+ DCU_SYN_POL_INV_VS_LOW |
+ DCU_SYN_POL_INV_HS_LOW);
+
+ dcu_write32(®s->bgnd,
+ DCU_BGND_R(0) | DCU_BGND_G(0) | DCU_BGND_B(0));
+
+ dcu_write32(®s->mode,
+ DCU_MODE_BLEND_ITER(DCU_LAYER_MAX_NUM) |
+ DCU_MODE_RASTER_EN);
+
+ dcu_write32(®s->threshold,
+ DCU_THRESHOLD_LS_BF_VS(0x3) |
+ DCU_THRESHOLD_OUT_BUF_HIGH(0x78) |
+ DCU_THRESHOLD_OUT_BUF_LOW(0));
+
+ mode = dcu_read32(®s->mode);
+ dcu_write32(®s->mode, mode | DCU_MODE_NORMAL);
+
+ layer_ctrldesc_init(0, pixel_format);
+
+ return 0;
+}
+
+void *video_hw_init(void)
+{
+ static GraphicDevice ctfb;
+ const char *options;
+ unsigned int depth = 0, freq = 0;
+ struct fb_videomode *fsl_dcu_mode_db = &fsl_dcu_mode_480_272;
+
+ if (!video_get_video_mode(&ctfb.winSizeX, &ctfb.winSizeY, &depth, &freq,
+ &options))
+ return NULL;
+
+ /* Find the monitor port, which is a required option */
+ if (!options)
+ return NULL;
+ if (strncmp(options, "monitor=", 8) != 0)
+ return NULL;
+
+ switch (RESOLUTION(ctfb.winSizeX, ctfb.winSizeY)) {
+ case RESOLUTION(480, 272):
+ fsl_dcu_mode_db = &fsl_dcu_mode_480_272;
+ break;
+ case RESOLUTION(640, 480):
+ fsl_dcu_mode_db = &fsl_dcu_mode_640_480;
+ break;
+ default:
+ printf("unsupported resolution %ux%u\n",
+ ctfb.winSizeX, ctfb.winSizeY);
+ }
+
+ info.var.xres = fsl_dcu_mode_db->xres;
+ info.var.yres = fsl_dcu_mode_db->yres;
+ info.var.bits_per_pixel = 32;
+ info.var.pixclock = fsl_dcu_mode_db->pixclock;
+ info.var.left_margin = fsl_dcu_mode_db->left_margin;
+ info.var.right_margin = fsl_dcu_mode_db->right_margin;
+ info.var.upper_margin = fsl_dcu_mode_db->upper_margin;
+ info.var.lower_margin = fsl_dcu_mode_db->lower_margin;
+ info.var.hsync_len = fsl_dcu_mode_db->hsync_len;
+ info.var.vsync_len = fsl_dcu_mode_db->vsync_len;
+ info.var.sync = fsl_dcu_mode_db->sync;
+ info.var.vmode = fsl_dcu_mode_db->vmode;
+ info.fix.line_length = info.var.xres * info.var.bits_per_pixel / 8;
+
+ if (platform_dcu_init(ctfb.winSizeX, ctfb.winSizeY,
+ options + 8, fsl_dcu_mode_db) < 0)
+ return NULL;
+
+ ctfb.frameAdrs = (unsigned int)info.screen_base;
+ ctfb.plnSizeX = ctfb.winSizeX;
+ ctfb.plnSizeY = ctfb.winSizeY;
+
+ ctfb.gdfBytesPP = 4;
+ ctfb.gdfIndex = GDF_32BIT_X888RGB;
+
+ ctfb.memSize = info.screen_size;
+
+ return &ctfb;
+}
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