drivers/video/atmel_hlcdfb.c - uboot-imx - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Driver for AT91/AT32 MULTI LAYER LCD Controller
  *
  * Copyright (C) 2012 Atmel Corporation
  */

 #include <common.h>
 #include <asm/io.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/clk.h>
 #include <clk.h>
 #include <dm.h>
 #include <fdtdec.h>
 #include <lcd.h>
 #include <video.h>
 #include <wait_bit.h>
 #include <atmel_hlcdc.h>

 #if defined(CONFIG_LCD_LOGO)
 #include <bmp_logo.h>
 #endif

 DECLARE_GLOBAL_DATA_PTR;

 #ifndef CONFIG_DM_VIDEO

 /* configurable parameters */
 #define ATMEL_LCDC_CVAL_DEFAULT		0xc8
 #define ATMEL_LCDC_DMA_BURST_LEN	8
 #ifndef ATMEL_LCDC_GUARD_TIME
 #define ATMEL_LCDC_GUARD_TIME		1
 #endif

 #define ATMEL_LCDC_FIFO_SIZE		512

 /*
  * the CLUT register map as following
  * RCLUT(24 ~ 16), GCLUT(15 ~ 8), BCLUT(7 ~ 0)
  */
 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 {
 	writel(panel_info.mmio + ATMEL_LCDC_LUT(regno),
 	       ((red << LCDC_BASECLUT_RCLUT_Pos) & LCDC_BASECLUT_RCLUT_Msk)
 	       | ((green << LCDC_BASECLUT_GCLUT_Pos) & LCDC_BASECLUT_GCLUT_Msk)
 	       | ((blue << LCDC_BASECLUT_BCLUT_Pos) & LCDC_BASECLUT_BCLUT_Msk));
 }

 ushort *configuration_get_cmap(void)
 {
 #if defined(CONFIG_LCD_LOGO)
 	return bmp_logo_palette;
 #else
 	return NULL;
 #endif
 }

 void lcd_ctrl_init(void *lcdbase)
 {
 	unsigned long value;
 	struct lcd_dma_desc *desc;
 	struct atmel_hlcd_regs *regs;
 	int ret;

 	if (!has_lcdc())
 		return;     /* No lcdc */

 	regs = (struct atmel_hlcd_regs *)panel_info.mmio;

 	/* Disable DISP signal */
 	writel(LCDC_LCDDIS_DISPDIS, &regs->lcdc_lcddis);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_DISPSTS,
 				false, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 	/* Disable synchronization */
 	writel(LCDC_LCDDIS_SYNCDIS, &regs->lcdc_lcddis);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_LCDSTS,
 				false, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 	/* Disable pixel clock */
 	writel(LCDC_LCDDIS_CLKDIS, &regs->lcdc_lcddis);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_CLKSTS,
 				false, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 	/* Disable PWM */
 	writel(LCDC_LCDDIS_PWMDIS, &regs->lcdc_lcddis);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_PWMSTS,
 				false, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);

 	/* Set pixel clock */
 	value = get_lcdc_clk_rate(0) / panel_info.vl_clk;
 	if (get_lcdc_clk_rate(0) % panel_info.vl_clk)
 		value++;

 	if (value < 1) {
 		/* Using system clock as pixel clock */
 		writel(LCDC_LCDCFG0_CLKDIV(0)
 			| LCDC_LCDCFG0_CGDISHCR
 			| LCDC_LCDCFG0_CGDISHEO
 			| LCDC_LCDCFG0_CGDISOVR1
 			| LCDC_LCDCFG0_CGDISBASE
 			| panel_info.vl_clk_pol
 			| LCDC_LCDCFG0_CLKSEL,
 			&regs->lcdc_lcdcfg0);

 	} else {
 		writel(LCDC_LCDCFG0_CLKDIV(value - 2)
 			| LCDC_LCDCFG0_CGDISHCR
 			| LCDC_LCDCFG0_CGDISHEO
 			| LCDC_LCDCFG0_CGDISOVR1
 			| LCDC_LCDCFG0_CGDISBASE
 			| panel_info.vl_clk_pol,
 			&regs->lcdc_lcdcfg0);
 	}

 	/* Initialize control register 5 */
 	value = 0;

 	value |= panel_info.vl_sync;

 #ifndef LCD_OUTPUT_BPP
 	/* Output is 24bpp */
 	value |= LCDC_LCDCFG5_MODE_OUTPUT_24BPP;
 #else
 	switch (LCD_OUTPUT_BPP) {
 	case 12:
 		value |= LCDC_LCDCFG5_MODE_OUTPUT_12BPP;
 		break;
 	case 16:
 		value |= LCDC_LCDCFG5_MODE_OUTPUT_16BPP;
 		break;
 	case 18:
 		value |= LCDC_LCDCFG5_MODE_OUTPUT_18BPP;
 		break;
 	case 24:
 		value |= LCDC_LCDCFG5_MODE_OUTPUT_24BPP;
 		break;
 	default:
 		BUG();
 		break;
 	}
 #endif

 	value |= LCDC_LCDCFG5_GUARDTIME(ATMEL_LCDC_GUARD_TIME);
 	value |= (LCDC_LCDCFG5_DISPDLY | LCDC_LCDCFG5_VSPDLYS);
 	writel(value, &regs->lcdc_lcdcfg5);

 	/* Vertical & Horizontal Timing */
 	value = LCDC_LCDCFG1_VSPW(panel_info.vl_vsync_len - 1);
 	value |= LCDC_LCDCFG1_HSPW(panel_info.vl_hsync_len - 1);
 	writel(value, &regs->lcdc_lcdcfg1);

 	value = LCDC_LCDCFG2_VBPW(panel_info.vl_upper_margin);
 	value |= LCDC_LCDCFG2_VFPW(panel_info.vl_lower_margin - 1);
 	writel(value, &regs->lcdc_lcdcfg2);

 	value = LCDC_LCDCFG3_HBPW(panel_info.vl_left_margin - 1);
 	value |= LCDC_LCDCFG3_HFPW(panel_info.vl_right_margin - 1);
 	writel(value, &regs->lcdc_lcdcfg3);

 	/* Display size */
 	value = LCDC_LCDCFG4_RPF(panel_info.vl_row - 1);
 	value |= LCDC_LCDCFG4_PPL(panel_info.vl_col - 1);
 	writel(value, &regs->lcdc_lcdcfg4);

 	writel(LCDC_BASECFG0_BLEN_AHB_INCR4 | LCDC_BASECFG0_DLBO,
 	       &regs->lcdc_basecfg0);

 	switch (NBITS(panel_info.vl_bpix)) {
 	case 16:
 		writel(LCDC_BASECFG1_RGBMODE_16BPP_RGB_565,
 		       &regs->lcdc_basecfg1);
 		break;
 	case 32:
 		writel(LCDC_BASECFG1_RGBMODE_24BPP_RGB_888,
 		       &regs->lcdc_basecfg1);
 		break;
 	default:
 		BUG();
 		break;
 	}

 	writel(LCDC_BASECFG2_XSTRIDE(0), &regs->lcdc_basecfg2);
 	writel(0, &regs->lcdc_basecfg3);
 	writel(LCDC_BASECFG4_DMA, &regs->lcdc_basecfg4);

 	/* Disable all interrupts */
 	writel(~0UL, &regs->lcdc_lcdidr);
 	writel(~0UL, &regs->lcdc_baseidr);

 	/* Setup the DMA descriptor, this descriptor will loop to itself */
 	desc = (struct lcd_dma_desc *)(lcdbase - 16);

 	desc->address = (u32)lcdbase;
 	/* Disable DMA transfer interrupt & descriptor loaded interrupt. */
 	desc->control = LCDC_BASECTRL_ADDIEN | LCDC_BASECTRL_DSCRIEN
 			| LCDC_BASECTRL_DMAIEN | LCDC_BASECTRL_DFETCH;
 	desc->next = (u32)desc;

 	/* Flush the DMA descriptor if we enabled dcache */
 	flush_dcache_range((u32)desc, (u32)desc + sizeof(*desc));

 	writel(desc->address, &regs->lcdc_baseaddr);
 	writel(desc->control, &regs->lcdc_basectrl);
 	writel(desc->next, &regs->lcdc_basenext);
 	writel(LCDC_BASECHER_CHEN | LCDC_BASECHER_UPDATEEN,
 	       &regs->lcdc_basecher);

 	/* Enable LCD */
 	value = readl(&regs->lcdc_lcden);
 	writel(value | LCDC_LCDEN_CLKEN, &regs->lcdc_lcden);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_CLKSTS,
 				true, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 	value = readl(&regs->lcdc_lcden);
 	writel(value | LCDC_LCDEN_SYNCEN, &regs->lcdc_lcden);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_LCDSTS,
 				true, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 	value = readl(&regs->lcdc_lcden);
 	writel(value | LCDC_LCDEN_DISPEN, &regs->lcdc_lcden);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_DISPSTS,
 				true, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 	value = readl(&regs->lcdc_lcden);
 	writel(value | LCDC_LCDEN_PWMEN, &regs->lcdc_lcden);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_PWMSTS,
 				true, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);

 	/* Enable flushing if we enabled dcache */
 	lcd_set_flush_dcache(1);
 }

 #else

 enum {
 	LCD_MAX_WIDTH		= 1024,
 	LCD_MAX_HEIGHT		= 768,
 	LCD_MAX_LOG2_BPP	= VIDEO_BPP16,
 };

 struct atmel_hlcdc_priv {
 	struct atmel_hlcd_regs *regs;
 	struct display_timing timing;
 	unsigned int vl_bpix;
 	unsigned int output_mode;
 	unsigned int guard_time;
 	ulong clk_rate;
 };

 static int at91_hlcdc_enable_clk(struct udevice *dev)
 {
 	struct atmel_hlcdc_priv *priv = dev_get_priv(dev);
 	struct clk clk;
 	ulong clk_rate;
 	int ret;

 	ret = clk_get_by_index(dev, 0, &clk);
 	if (ret)
 		return -EINVAL;

 	ret = clk_enable(&clk);
 	if (ret)
 		return ret;

 	clk_rate = clk_get_rate(&clk);
 	if (!clk_rate) {
 		clk_disable(&clk);
 		return -ENODEV;
 	}

 	priv->clk_rate = clk_rate;

 	clk_free(&clk);

 	return 0;
 }

 static void atmel_hlcdc_init(struct udevice *dev)
 {
 	struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
 	struct atmel_hlcdc_priv *priv = dev_get_priv(dev);
 	struct atmel_hlcd_regs *regs = priv->regs;
 	struct display_timing *timing = &priv->timing;
 	struct lcd_dma_desc *desc;
 	unsigned long value, vl_clk_pol;
 	int ret;

 	/* Disable DISP signal */
 	writel(LCDC_LCDDIS_DISPDIS, &regs->lcdc_lcddis);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_DISPSTS,
 				false, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 	/* Disable synchronization */
 	writel(LCDC_LCDDIS_SYNCDIS, &regs->lcdc_lcddis);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_LCDSTS,
 				false, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 	/* Disable pixel clock */
 	writel(LCDC_LCDDIS_CLKDIS, &regs->lcdc_lcddis);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_CLKSTS,
 				false, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 	/* Disable PWM */
 	writel(LCDC_LCDDIS_PWMDIS, &regs->lcdc_lcddis);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_PWMSTS,
 				false, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);

 	/* Set pixel clock */
 	value = priv->clk_rate / timing->pixelclock.typ;
 	if (priv->clk_rate % timing->pixelclock.typ)
 		value++;

 	vl_clk_pol = 0;
 	if (timing->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
 		vl_clk_pol = LCDC_LCDCFG0_CLKPOL;

 	if (value < 1) {
 		/* Using system clock as pixel clock */
 		writel(LCDC_LCDCFG0_CLKDIV(0)
 			| LCDC_LCDCFG0_CGDISHCR
 			| LCDC_LCDCFG0_CGDISHEO
 			| LCDC_LCDCFG0_CGDISOVR1
 			| LCDC_LCDCFG0_CGDISBASE
 			| vl_clk_pol
 			| LCDC_LCDCFG0_CLKSEL,
 			&regs->lcdc_lcdcfg0);

 	} else {
 		writel(LCDC_LCDCFG0_CLKDIV(value - 2)
 			| LCDC_LCDCFG0_CGDISHCR
 			| LCDC_LCDCFG0_CGDISHEO
 			| LCDC_LCDCFG0_CGDISOVR1
 			| LCDC_LCDCFG0_CGDISBASE
 			| vl_clk_pol,
 			&regs->lcdc_lcdcfg0);
 	}

 	/* Initialize control register 5 */
 	value = 0;

 	if (!(timing->flags & DISPLAY_FLAGS_HSYNC_HIGH))
 		value |= LCDC_LCDCFG5_HSPOL;
 	if (!(timing->flags & DISPLAY_FLAGS_VSYNC_HIGH))
 		value |= LCDC_LCDCFG5_VSPOL;

 	switch (priv->output_mode) {
 	case 12:
 		value |= LCDC_LCDCFG5_MODE_OUTPUT_12BPP;
 		break;
 	case 16:
 		value |= LCDC_LCDCFG5_MODE_OUTPUT_16BPP;
 		break;
 	case 18:
 		value |= LCDC_LCDCFG5_MODE_OUTPUT_18BPP;
 		break;
 	case 24:
 		value |= LCDC_LCDCFG5_MODE_OUTPUT_24BPP;
 		break;
 	default:
 		BUG();
 		break;
 	}

 	value |= LCDC_LCDCFG5_GUARDTIME(priv->guard_time);
 	value |= (LCDC_LCDCFG5_DISPDLY | LCDC_LCDCFG5_VSPDLYS);
 	writel(value, &regs->lcdc_lcdcfg5);

 	/* Vertical & Horizontal Timing */
 	value = LCDC_LCDCFG1_VSPW(timing->vsync_len.typ - 1);
 	value |= LCDC_LCDCFG1_HSPW(timing->hsync_len.typ - 1);
 	writel(value, &regs->lcdc_lcdcfg1);

 	value = LCDC_LCDCFG2_VBPW(timing->vback_porch.typ);
 	value |= LCDC_LCDCFG2_VFPW(timing->vfront_porch.typ - 1);
 	writel(value, &regs->lcdc_lcdcfg2);

 	value = LCDC_LCDCFG3_HBPW(timing->hback_porch.typ - 1);
 	value |= LCDC_LCDCFG3_HFPW(timing->hfront_porch.typ - 1);
 	writel(value, &regs->lcdc_lcdcfg3);

 	/* Display size */
 	value = LCDC_LCDCFG4_RPF(timing->vactive.typ - 1);
 	value |= LCDC_LCDCFG4_PPL(timing->hactive.typ - 1);
 	writel(value, &regs->lcdc_lcdcfg4);

 	writel(LCDC_BASECFG0_BLEN_AHB_INCR4 | LCDC_BASECFG0_DLBO,
 	       &regs->lcdc_basecfg0);

 	switch (VNBITS(priv->vl_bpix)) {
 	case 16:
 		writel(LCDC_BASECFG1_RGBMODE_16BPP_RGB_565,
 		       &regs->lcdc_basecfg1);
 		break;
 	case 32:
 		writel(LCDC_BASECFG1_RGBMODE_24BPP_RGB_888,
 		       &regs->lcdc_basecfg1);
 		break;
 	default:
 		BUG();
 		break;
 	}

 	writel(LCDC_BASECFG2_XSTRIDE(0), &regs->lcdc_basecfg2);
 	writel(0, &regs->lcdc_basecfg3);
 	writel(LCDC_BASECFG4_DMA, &regs->lcdc_basecfg4);

 	/* Disable all interrupts */
 	writel(~0UL, &regs->lcdc_lcdidr);
 	writel(~0UL, &regs->lcdc_baseidr);

 	/* Setup the DMA descriptor, this descriptor will loop to itself */
 	desc = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*desc));
 	if (!desc)
 		return;

 	desc->address = (u32)uc_plat->base;

 	/* Disable DMA transfer interrupt & descriptor loaded interrupt. */
 	desc->control = LCDC_BASECTRL_ADDIEN | LCDC_BASECTRL_DSCRIEN
 			| LCDC_BASECTRL_DMAIEN | LCDC_BASECTRL_DFETCH;
 	desc->next = (u32)desc;

 	/* Flush the DMA descriptor if we enabled dcache */
 	flush_dcache_range((u32)desc,
 			   ALIGN(((u32)desc + sizeof(*desc)),
 			   CONFIG_SYS_CACHELINE_SIZE));

 	writel(desc->address, &regs->lcdc_baseaddr);
 	writel(desc->control, &regs->lcdc_basectrl);
 	writel(desc->next, &regs->lcdc_basenext);
 	writel(LCDC_BASECHER_CHEN | LCDC_BASECHER_UPDATEEN,
 	       &regs->lcdc_basecher);

 	/* Enable LCD */
 	value = readl(&regs->lcdc_lcden);
 	writel(value | LCDC_LCDEN_CLKEN, &regs->lcdc_lcden);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_CLKSTS,
 				true, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 	value = readl(&regs->lcdc_lcden);
 	writel(value | LCDC_LCDEN_SYNCEN, &regs->lcdc_lcden);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_LCDSTS,
 				true, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 	value = readl(&regs->lcdc_lcden);
 	writel(value | LCDC_LCDEN_DISPEN, &regs->lcdc_lcden);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_DISPSTS,
 				true, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 	value = readl(&regs->lcdc_lcden);
 	writel(value | LCDC_LCDEN_PWMEN, &regs->lcdc_lcden);
 	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_PWMSTS,
 				true, 1000, false);
 	if (ret)
 		printf("%s: %d: Timeout!\n", __func__, __LINE__);
 }

 static int atmel_hlcdc_probe(struct udevice *dev)
 {
 	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
 	struct atmel_hlcdc_priv *priv = dev_get_priv(dev);
 	int ret;

 	ret = at91_hlcdc_enable_clk(dev);
 	if (ret)
 		return ret;

 	atmel_hlcdc_init(dev);

 	uc_priv->xsize = priv->timing.hactive.typ;
 	uc_priv->ysize = priv->timing.vactive.typ;
 	uc_priv->bpix = priv->vl_bpix;

 	/* Enable flushing if we enabled dcache */
 	video_set_flush_dcache(dev, true);

 	return 0;
 }

 static int atmel_hlcdc_ofdata_to_platdata(struct udevice *dev)
 {
 	struct atmel_hlcdc_priv *priv = dev_get_priv(dev);
 	const void *blob = gd->fdt_blob;
 	int node = dev_of_offset(dev);

 	priv->regs = (struct atmel_hlcd_regs *)devfdt_get_addr(dev);
 	if (!priv->regs) {
 		debug("%s: No display controller address\n", __func__);
 		return -EINVAL;
 	}

 	if (fdtdec_decode_display_timing(blob, dev_of_offset(dev),
 					 0, &priv->timing)) {
 		debug("%s: Failed to decode display timing\n", __func__);
 		return -EINVAL;
 	}

 	if (priv->timing.hactive.typ > LCD_MAX_WIDTH)
 		priv->timing.hactive.typ = LCD_MAX_WIDTH;

 	if (priv->timing.vactive.typ > LCD_MAX_HEIGHT)
 		priv->timing.vactive.typ = LCD_MAX_HEIGHT;

 	priv->vl_bpix = fdtdec_get_int(blob, node, "atmel,vl-bpix", 0);
 	if (!priv->vl_bpix) {
 		debug("%s: Failed to get bits per pixel\n", __func__);
 		return -EINVAL;
 	}

 	priv->output_mode = fdtdec_get_int(blob, node, "atmel,output-mode", 24);
 	priv->guard_time = fdtdec_get_int(blob, node, "atmel,guard-time", 1);

 	return 0;
 }

 static int atmel_hlcdc_bind(struct udevice *dev)
 {
 	struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);

 	uc_plat->size = LCD_MAX_WIDTH * LCD_MAX_HEIGHT *
 				(1 << LCD_MAX_LOG2_BPP) / 8;

 	debug("%s: Frame buffer size %x\n", __func__, uc_plat->size);

 	return 0;
 }

 static const struct udevice_id atmel_hlcdc_ids[] = {
 	{ .compatible = "atmel,sama5d2-hlcdc" },
 	{ .compatible = "atmel,at91sam9x5-hlcdc" },
 	{ }
 };

 U_BOOT_DRIVER(atmel_hlcdfb) = {
 	.name	= "atmel_hlcdfb",
 	.id	= UCLASS_VIDEO,
 	.of_match = atmel_hlcdc_ids,
 	.bind	= atmel_hlcdc_bind,
 	.probe	= atmel_hlcdc_probe,
 	.ofdata_to_platdata = atmel_hlcdc_ofdata_to_platdata,
 	.priv_auto_alloc_size = sizeof(struct atmel_hlcdc_priv),
 };

 #endif
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Driver for AT91/AT32 MULTI LAYER LCD Controller
	*
	* Copyright (C) 2012 Atmel Corporation
	*/

	#include <common.h>
	#include <asm/io.h>
	#include <asm/arch/gpio.h>
	#include <asm/arch/clk.h>
	#include <clk.h>
	#include <dm.h>
	#include <fdtdec.h>
	#include <lcd.h>
	#include <video.h>
	#include <wait_bit.h>
	#include <atmel_hlcdc.h>

	#if defined(CONFIG_LCD_LOGO)
	#include <bmp_logo.h>
	#endif

	DECLARE_GLOBAL_DATA_PTR;

	#ifndef CONFIG_DM_VIDEO

	/* configurable parameters */
	#define ATMEL_LCDC_CVAL_DEFAULT 0xc8
	#define ATMEL_LCDC_DMA_BURST_LEN 8
	#ifndef ATMEL_LCDC_GUARD_TIME
	#define ATMEL_LCDC_GUARD_TIME 1
	#endif

	#define ATMEL_LCDC_FIFO_SIZE 512

	/*
	* the CLUT register map as following
	* RCLUT(24 ~ 16), GCLUT(15 ~ 8), BCLUT(7 ~ 0)
	*/
	void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
	{
	writel(panel_info.mmio + ATMEL_LCDC_LUT(regno),
	((red << LCDC_BASECLUT_RCLUT_Pos) & LCDC_BASECLUT_RCLUT_Msk)
	\| ((green << LCDC_BASECLUT_GCLUT_Pos) & LCDC_BASECLUT_GCLUT_Msk)
	\| ((blue << LCDC_BASECLUT_BCLUT_Pos) & LCDC_BASECLUT_BCLUT_Msk));
	}

	ushort *configuration_get_cmap(void)
	{
	#if defined(CONFIG_LCD_LOGO)
	return bmp_logo_palette;
	#else
	return NULL;
	#endif
	}

	void lcd_ctrl_init(void *lcdbase)
	{
	unsigned long value;
	struct lcd_dma_desc *desc;
	struct atmel_hlcd_regs *regs;
	int ret;

	if (!has_lcdc())
	return; /* No lcdc */

	regs = (struct atmel_hlcd_regs *)panel_info.mmio;

	/* Disable DISP signal */
	writel(LCDC_LCDDIS_DISPDIS, &regs->lcdc_lcddis);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_DISPSTS,
	false, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	/* Disable synchronization */
	writel(LCDC_LCDDIS_SYNCDIS, &regs->lcdc_lcddis);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_LCDSTS,
	false, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	/* Disable pixel clock */
	writel(LCDC_LCDDIS_CLKDIS, &regs->lcdc_lcddis);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_CLKSTS,
	false, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	/* Disable PWM */
	writel(LCDC_LCDDIS_PWMDIS, &regs->lcdc_lcddis);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_PWMSTS,
	false, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);

	/* Set pixel clock */
	value = get_lcdc_clk_rate(0) / panel_info.vl_clk;
	if (get_lcdc_clk_rate(0) % panel_info.vl_clk)
	value++;

	if (value < 1) {
	/* Using system clock as pixel clock */
	writel(LCDC_LCDCFG0_CLKDIV(0)
	\| LCDC_LCDCFG0_CGDISHCR
	\| LCDC_LCDCFG0_CGDISHEO
	\| LCDC_LCDCFG0_CGDISOVR1
	\| LCDC_LCDCFG0_CGDISBASE
	\| panel_info.vl_clk_pol
	\| LCDC_LCDCFG0_CLKSEL,
	&regs->lcdc_lcdcfg0);

	} else {
	writel(LCDC_LCDCFG0_CLKDIV(value - 2)
	\| LCDC_LCDCFG0_CGDISHCR
	\| LCDC_LCDCFG0_CGDISHEO
	\| LCDC_LCDCFG0_CGDISOVR1
	\| LCDC_LCDCFG0_CGDISBASE
	\| panel_info.vl_clk_pol,
	&regs->lcdc_lcdcfg0);
	}

	/* Initialize control register 5 */
	value = 0;

	value \|= panel_info.vl_sync;

	#ifndef LCD_OUTPUT_BPP
	/* Output is 24bpp */
	value \|= LCDC_LCDCFG5_MODE_OUTPUT_24BPP;
	#else
	switch (LCD_OUTPUT_BPP) {
	case 12:
	value \|= LCDC_LCDCFG5_MODE_OUTPUT_12BPP;
	break;
	case 16:
	value \|= LCDC_LCDCFG5_MODE_OUTPUT_16BPP;
	break;
	case 18:
	value \|= LCDC_LCDCFG5_MODE_OUTPUT_18BPP;
	break;
	case 24:
	value \|= LCDC_LCDCFG5_MODE_OUTPUT_24BPP;
	break;
	default:
	BUG();
	break;
	}
	#endif

	value \|= LCDC_LCDCFG5_GUARDTIME(ATMEL_LCDC_GUARD_TIME);
	value \|= (LCDC_LCDCFG5_DISPDLY \| LCDC_LCDCFG5_VSPDLYS);
	writel(value, &regs->lcdc_lcdcfg5);

	/* Vertical & Horizontal Timing */
	value = LCDC_LCDCFG1_VSPW(panel_info.vl_vsync_len - 1);
	value \|= LCDC_LCDCFG1_HSPW(panel_info.vl_hsync_len - 1);
	writel(value, &regs->lcdc_lcdcfg1);

	value = LCDC_LCDCFG2_VBPW(panel_info.vl_upper_margin);
	value \|= LCDC_LCDCFG2_VFPW(panel_info.vl_lower_margin - 1);
	writel(value, &regs->lcdc_lcdcfg2);

	value = LCDC_LCDCFG3_HBPW(panel_info.vl_left_margin - 1);
	value \|= LCDC_LCDCFG3_HFPW(panel_info.vl_right_margin - 1);
	writel(value, &regs->lcdc_lcdcfg3);

	/* Display size */
	value = LCDC_LCDCFG4_RPF(panel_info.vl_row - 1);
	value \|= LCDC_LCDCFG4_PPL(panel_info.vl_col - 1);
	writel(value, &regs->lcdc_lcdcfg4);

	writel(LCDC_BASECFG0_BLEN_AHB_INCR4 \| LCDC_BASECFG0_DLBO,
	&regs->lcdc_basecfg0);

	switch (NBITS(panel_info.vl_bpix)) {
	case 16:
	writel(LCDC_BASECFG1_RGBMODE_16BPP_RGB_565,
	&regs->lcdc_basecfg1);
	break;
	case 32:
	writel(LCDC_BASECFG1_RGBMODE_24BPP_RGB_888,
	&regs->lcdc_basecfg1);
	break;
	default:
	BUG();
	break;
	}

	writel(LCDC_BASECFG2_XSTRIDE(0), &regs->lcdc_basecfg2);
	writel(0, &regs->lcdc_basecfg3);
	writel(LCDC_BASECFG4_DMA, &regs->lcdc_basecfg4);

	/* Disable all interrupts */
	writel(~0UL, &regs->lcdc_lcdidr);
	writel(~0UL, &regs->lcdc_baseidr);

	/* Setup the DMA descriptor, this descriptor will loop to itself */
	desc = (struct lcd_dma_desc *)(lcdbase - 16);

	desc->address = (u32)lcdbase;
	/* Disable DMA transfer interrupt & descriptor loaded interrupt. */
	desc->control = LCDC_BASECTRL_ADDIEN \| LCDC_BASECTRL_DSCRIEN
	\| LCDC_BASECTRL_DMAIEN \| LCDC_BASECTRL_DFETCH;
	desc->next = (u32)desc;

	/* Flush the DMA descriptor if we enabled dcache */
	flush_dcache_range((u32)desc, (u32)desc + sizeof(*desc));

	writel(desc->address, &regs->lcdc_baseaddr);
	writel(desc->control, &regs->lcdc_basectrl);
	writel(desc->next, &regs->lcdc_basenext);
	writel(LCDC_BASECHER_CHEN \| LCDC_BASECHER_UPDATEEN,
	&regs->lcdc_basecher);

	/* Enable LCD */
	value = readl(&regs->lcdc_lcden);
	writel(value \| LCDC_LCDEN_CLKEN, &regs->lcdc_lcden);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_CLKSTS,
	true, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	value = readl(&regs->lcdc_lcden);
	writel(value \| LCDC_LCDEN_SYNCEN, &regs->lcdc_lcden);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_LCDSTS,
	true, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	value = readl(&regs->lcdc_lcden);
	writel(value \| LCDC_LCDEN_DISPEN, &regs->lcdc_lcden);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_DISPSTS,
	true, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	value = readl(&regs->lcdc_lcden);
	writel(value \| LCDC_LCDEN_PWMEN, &regs->lcdc_lcden);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_PWMSTS,
	true, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);

	/* Enable flushing if we enabled dcache */
	lcd_set_flush_dcache(1);
	}

	#else

	enum {
	LCD_MAX_WIDTH = 1024,
	LCD_MAX_HEIGHT = 768,
	LCD_MAX_LOG2_BPP = VIDEO_BPP16,
	};

	struct atmel_hlcdc_priv {
	struct atmel_hlcd_regs *regs;
	struct display_timing timing;
	unsigned int vl_bpix;
	unsigned int output_mode;
	unsigned int guard_time;
	ulong clk_rate;
	};

	static int at91_hlcdc_enable_clk(struct udevice *dev)
	{
	struct atmel_hlcdc_priv *priv = dev_get_priv(dev);
	struct clk clk;
	ulong clk_rate;
	int ret;

	ret = clk_get_by_index(dev, 0, &clk);
	if (ret)
	return -EINVAL;

	ret = clk_enable(&clk);
	if (ret)
	return ret;

	clk_rate = clk_get_rate(&clk);
	if (!clk_rate) {
	clk_disable(&clk);
	return -ENODEV;
	}

	priv->clk_rate = clk_rate;

	clk_free(&clk);

	return 0;
	}

	static void atmel_hlcdc_init(struct udevice *dev)
	{
	struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
	struct atmel_hlcdc_priv *priv = dev_get_priv(dev);
	struct atmel_hlcd_regs *regs = priv->regs;
	struct display_timing *timing = &priv->timing;
	struct lcd_dma_desc *desc;
	unsigned long value, vl_clk_pol;
	int ret;

	/* Disable DISP signal */
	writel(LCDC_LCDDIS_DISPDIS, &regs->lcdc_lcddis);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_DISPSTS,
	false, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	/* Disable synchronization */
	writel(LCDC_LCDDIS_SYNCDIS, &regs->lcdc_lcddis);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_LCDSTS,
	false, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	/* Disable pixel clock */
	writel(LCDC_LCDDIS_CLKDIS, &regs->lcdc_lcddis);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_CLKSTS,
	false, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	/* Disable PWM */
	writel(LCDC_LCDDIS_PWMDIS, &regs->lcdc_lcddis);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_PWMSTS,
	false, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);

	/* Set pixel clock */
	value = priv->clk_rate / timing->pixelclock.typ;
	if (priv->clk_rate % timing->pixelclock.typ)
	value++;

	vl_clk_pol = 0;
	if (timing->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
	vl_clk_pol = LCDC_LCDCFG0_CLKPOL;

	if (value < 1) {
	/* Using system clock as pixel clock */
	writel(LCDC_LCDCFG0_CLKDIV(0)
	\| LCDC_LCDCFG0_CGDISHCR
	\| LCDC_LCDCFG0_CGDISHEO
	\| LCDC_LCDCFG0_CGDISOVR1
	\| LCDC_LCDCFG0_CGDISBASE
	\| vl_clk_pol
	\| LCDC_LCDCFG0_CLKSEL,
	&regs->lcdc_lcdcfg0);

	} else {
	writel(LCDC_LCDCFG0_CLKDIV(value - 2)
	\| LCDC_LCDCFG0_CGDISHCR
	\| LCDC_LCDCFG0_CGDISHEO
	\| LCDC_LCDCFG0_CGDISOVR1
	\| LCDC_LCDCFG0_CGDISBASE
	\| vl_clk_pol,
	&regs->lcdc_lcdcfg0);
	}

	/* Initialize control register 5 */
	value = 0;

	if (!(timing->flags & DISPLAY_FLAGS_HSYNC_HIGH))
	value \|= LCDC_LCDCFG5_HSPOL;
	if (!(timing->flags & DISPLAY_FLAGS_VSYNC_HIGH))
	value \|= LCDC_LCDCFG5_VSPOL;

	switch (priv->output_mode) {
	case 12:
	value \|= LCDC_LCDCFG5_MODE_OUTPUT_12BPP;
	break;
	case 16:
	value \|= LCDC_LCDCFG5_MODE_OUTPUT_16BPP;
	break;
	case 18:
	value \|= LCDC_LCDCFG5_MODE_OUTPUT_18BPP;
	break;
	case 24:
	value \|= LCDC_LCDCFG5_MODE_OUTPUT_24BPP;
	break;
	default:
	BUG();
	break;
	}

	value \|= LCDC_LCDCFG5_GUARDTIME(priv->guard_time);
	value \|= (LCDC_LCDCFG5_DISPDLY \| LCDC_LCDCFG5_VSPDLYS);
	writel(value, &regs->lcdc_lcdcfg5);

	/* Vertical & Horizontal Timing */
	value = LCDC_LCDCFG1_VSPW(timing->vsync_len.typ - 1);
	value \|= LCDC_LCDCFG1_HSPW(timing->hsync_len.typ - 1);
	writel(value, &regs->lcdc_lcdcfg1);

	value = LCDC_LCDCFG2_VBPW(timing->vback_porch.typ);
	value \|= LCDC_LCDCFG2_VFPW(timing->vfront_porch.typ - 1);
	writel(value, &regs->lcdc_lcdcfg2);

	value = LCDC_LCDCFG3_HBPW(timing->hback_porch.typ - 1);
	value \|= LCDC_LCDCFG3_HFPW(timing->hfront_porch.typ - 1);
	writel(value, &regs->lcdc_lcdcfg3);

	/* Display size */
	value = LCDC_LCDCFG4_RPF(timing->vactive.typ - 1);
	value \|= LCDC_LCDCFG4_PPL(timing->hactive.typ - 1);
	writel(value, &regs->lcdc_lcdcfg4);

	writel(LCDC_BASECFG0_BLEN_AHB_INCR4 \| LCDC_BASECFG0_DLBO,
	&regs->lcdc_basecfg0);

	switch (VNBITS(priv->vl_bpix)) {
	case 16:
	writel(LCDC_BASECFG1_RGBMODE_16BPP_RGB_565,
	&regs->lcdc_basecfg1);
	break;
	case 32:
	writel(LCDC_BASECFG1_RGBMODE_24BPP_RGB_888,
	&regs->lcdc_basecfg1);
	break;
	default:
	BUG();
	break;
	}

	writel(LCDC_BASECFG2_XSTRIDE(0), &regs->lcdc_basecfg2);
	writel(0, &regs->lcdc_basecfg3);
	writel(LCDC_BASECFG4_DMA, &regs->lcdc_basecfg4);

	/* Disable all interrupts */
	writel(~0UL, &regs->lcdc_lcdidr);
	writel(~0UL, &regs->lcdc_baseidr);

	/* Setup the DMA descriptor, this descriptor will loop to itself */
	desc = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*desc));
	if (!desc)
	return;

	desc->address = (u32)uc_plat->base;

	/* Disable DMA transfer interrupt & descriptor loaded interrupt. */
	desc->control = LCDC_BASECTRL_ADDIEN \| LCDC_BASECTRL_DSCRIEN
	\| LCDC_BASECTRL_DMAIEN \| LCDC_BASECTRL_DFETCH;
	desc->next = (u32)desc;

	/* Flush the DMA descriptor if we enabled dcache */
	flush_dcache_range((u32)desc,
	ALIGN(((u32)desc + sizeof(*desc)),
	CONFIG_SYS_CACHELINE_SIZE));

	writel(desc->address, &regs->lcdc_baseaddr);
	writel(desc->control, &regs->lcdc_basectrl);
	writel(desc->next, &regs->lcdc_basenext);
	writel(LCDC_BASECHER_CHEN \| LCDC_BASECHER_UPDATEEN,
	&regs->lcdc_basecher);

	/* Enable LCD */
	value = readl(&regs->lcdc_lcden);
	writel(value \| LCDC_LCDEN_CLKEN, &regs->lcdc_lcden);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_CLKSTS,
	true, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	value = readl(&regs->lcdc_lcden);
	writel(value \| LCDC_LCDEN_SYNCEN, &regs->lcdc_lcden);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_LCDSTS,
	true, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	value = readl(&regs->lcdc_lcden);
	writel(value \| LCDC_LCDEN_DISPEN, &regs->lcdc_lcden);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_DISPSTS,
	true, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	value = readl(&regs->lcdc_lcden);
	writel(value \| LCDC_LCDEN_PWMEN, &regs->lcdc_lcden);
	ret = wait_for_bit_le32(&regs->lcdc_lcdsr, LCDC_LCDSR_PWMSTS,
	true, 1000, false);
	if (ret)
	printf("%s: %d: Timeout!\n", __func__, __LINE__);
	}

	static int atmel_hlcdc_probe(struct udevice *dev)
	{
	struct video_priv *uc_priv = dev_get_uclass_priv(dev);
	struct atmel_hlcdc_priv *priv = dev_get_priv(dev);
	int ret;

	ret = at91_hlcdc_enable_clk(dev);
	if (ret)
	return ret;

	atmel_hlcdc_init(dev);

	uc_priv->xsize = priv->timing.hactive.typ;
	uc_priv->ysize = priv->timing.vactive.typ;
	uc_priv->bpix = priv->vl_bpix;

	/* Enable flushing if we enabled dcache */
	video_set_flush_dcache(dev, true);

	return 0;
	}

	static int atmel_hlcdc_ofdata_to_platdata(struct udevice *dev)
	{
	struct atmel_hlcdc_priv *priv = dev_get_priv(dev);
	const void *blob = gd->fdt_blob;
	int node = dev_of_offset(dev);

	priv->regs = (struct atmel_hlcd_regs *)devfdt_get_addr(dev);
	if (!priv->regs) {
	debug("%s: No display controller address\n", __func__);
	return -EINVAL;
	}

	if (fdtdec_decode_display_timing(blob, dev_of_offset(dev),
	0, &priv->timing)) {
	debug("%s: Failed to decode display timing\n", __func__);
	return -EINVAL;
	}

	if (priv->timing.hactive.typ > LCD_MAX_WIDTH)
	priv->timing.hactive.typ = LCD_MAX_WIDTH;

	if (priv->timing.vactive.typ > LCD_MAX_HEIGHT)
	priv->timing.vactive.typ = LCD_MAX_HEIGHT;

	priv->vl_bpix = fdtdec_get_int(blob, node, "atmel,vl-bpix", 0);
	if (!priv->vl_bpix) {
	debug("%s: Failed to get bits per pixel\n", __func__);
	return -EINVAL;
	}

	priv->output_mode = fdtdec_get_int(blob, node, "atmel,output-mode", 24);
	priv->guard_time = fdtdec_get_int(blob, node, "atmel,guard-time", 1);

	return 0;
	}

	static int atmel_hlcdc_bind(struct udevice *dev)
	{
	struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);

	uc_plat->size = LCD_MAX_WIDTH * LCD_MAX_HEIGHT *
	(1 << LCD_MAX_LOG2_BPP) / 8;

	debug("%s: Frame buffer size %x\n", __func__, uc_plat->size);

	return 0;
	}

	static const struct udevice_id atmel_hlcdc_ids[] = {
	{ .compatible = "atmel,sama5d2-hlcdc" },
	{ .compatible = "atmel,at91sam9x5-hlcdc" },
	{ }
	};

	U_BOOT_DRIVER(atmel_hlcdfb) = {
	.name = "atmel_hlcdfb",
	.id = UCLASS_VIDEO,
	.of_match = atmel_hlcdc_ids,
	.bind = atmel_hlcdc_bind,
	.probe = atmel_hlcdc_probe,
	.ofdata_to_platdata = atmel_hlcdc_ofdata_to_platdata,
	.priv_auto_alloc_size = sizeof(struct atmel_hlcdc_priv),
	};

	#endif