Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1667 insertions, 0 deletions

diff --git a/drivers/video/fbdev/da8xx-fb.c b/drivers/video/fbdev/da8xx-fb.c
new file mode 100644
index 000000000..11922b009
--- /dev/null
+++ b/drivers/video/fbdev/da8xx-fb.c
@@ -0,0 +1,1667 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2008-2009 MontaVista Software Inc.
+ * Copyright (C) 2008-2009 Texas Instruments Inc
+ *
+ * Based on the LCD driver for TI Avalanche processors written by
+ * Ajay Singh and Shalom Hai.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/fb.h>
+#include <linux/dma-mapping.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/uaccess.h>
+#include <linux/pm_runtime.h>
+#include <linux/interrupt.h>
+#include <linux/wait.h>
+#include <linux/clk.h>
+#include <linux/cpufreq.h>
+#include <linux/console.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/lcm.h>
+#include <video/da8xx-fb.h>
+#include <asm/div64.h>
+
+#define DRIVER_NAME "da8xx_lcdc"
+
+#define LCD_VERSION_1	1
+#define LCD_VERSION_2	2
+
+/* LCD Status Register */
+#define LCD_END_OF_FRAME1		BIT(9)
+#define LCD_END_OF_FRAME0		BIT(8)
+#define LCD_PL_LOAD_DONE		BIT(6)
+#define LCD_FIFO_UNDERFLOW		BIT(5)
+#define LCD_SYNC_LOST			BIT(2)
+#define LCD_FRAME_DONE			BIT(0)
+
+/* LCD DMA Control Register */
+#define LCD_DMA_BURST_SIZE(x)		((x) << 4)
+#define LCD_DMA_BURST_1			0x0
+#define LCD_DMA_BURST_2			0x1
+#define LCD_DMA_BURST_4			0x2
+#define LCD_DMA_BURST_8			0x3
+#define LCD_DMA_BURST_16		0x4
+#define LCD_V1_END_OF_FRAME_INT_ENA	BIT(2)
+#define LCD_V2_END_OF_FRAME0_INT_ENA	BIT(8)
+#define LCD_V2_END_OF_FRAME1_INT_ENA	BIT(9)
+#define LCD_DUAL_FRAME_BUFFER_ENABLE	BIT(0)
+
+/* LCD Control Register */
+#define LCD_CLK_DIVISOR(x)		((x) << 8)
+#define LCD_RASTER_MODE			0x01
+
+/* LCD Raster Control Register */
+#define LCD_PALETTE_LOAD_MODE(x)	((x) << 20)
+#define PALETTE_AND_DATA		0x00
+#define PALETTE_ONLY			0x01
+#define DATA_ONLY			0x02
+
+#define LCD_MONO_8BIT_MODE		BIT(9)
+#define LCD_RASTER_ORDER		BIT(8)
+#define LCD_TFT_MODE			BIT(7)
+#define LCD_V1_UNDERFLOW_INT_ENA	BIT(6)
+#define LCD_V2_UNDERFLOW_INT_ENA	BIT(5)
+#define LCD_V1_PL_INT_ENA		BIT(4)
+#define LCD_V2_PL_INT_ENA		BIT(6)
+#define LCD_MONOCHROME_MODE		BIT(1)
+#define LCD_RASTER_ENABLE		BIT(0)
+#define LCD_TFT_ALT_ENABLE		BIT(23)
+#define LCD_STN_565_ENABLE		BIT(24)
+#define LCD_V2_DMA_CLK_EN		BIT(2)
+#define LCD_V2_LIDD_CLK_EN		BIT(1)
+#define LCD_V2_CORE_CLK_EN		BIT(0)
+#define LCD_V2_LPP_B10			26
+#define LCD_V2_TFT_24BPP_MODE		BIT(25)
+#define LCD_V2_TFT_24BPP_UNPACK		BIT(26)
+
+/* LCD Raster Timing 2 Register */
+#define LCD_AC_BIAS_TRANSITIONS_PER_INT(x)	((x) << 16)
+#define LCD_AC_BIAS_FREQUENCY(x)		((x) << 8)
+#define LCD_SYNC_CTRL				BIT(25)
+#define LCD_SYNC_EDGE				BIT(24)
+#define LCD_INVERT_PIXEL_CLOCK			BIT(22)
+#define LCD_INVERT_LINE_CLOCK			BIT(21)
+#define LCD_INVERT_FRAME_CLOCK			BIT(20)
+
+/* LCD Block */
+#define  LCD_PID_REG				0x0
+#define  LCD_CTRL_REG				0x4
+#define  LCD_STAT_REG				0x8
+#define  LCD_RASTER_CTRL_REG			0x28
+#define  LCD_RASTER_TIMING_0_REG		0x2C
+#define  LCD_RASTER_TIMING_1_REG		0x30
+#define  LCD_RASTER_TIMING_2_REG		0x34
+#define  LCD_DMA_CTRL_REG			0x40
+#define  LCD_DMA_FRM_BUF_BASE_ADDR_0_REG	0x44
+#define  LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG	0x48
+#define  LCD_DMA_FRM_BUF_BASE_ADDR_1_REG	0x4C
+#define  LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG	0x50
+
+/* Interrupt Registers available only in Version 2 */
+#define  LCD_RAW_STAT_REG			0x58
+#define  LCD_MASKED_STAT_REG			0x5c
+#define  LCD_INT_ENABLE_SET_REG			0x60
+#define  LCD_INT_ENABLE_CLR_REG			0x64
+#define  LCD_END_OF_INT_IND_REG			0x68
+
+/* Clock registers available only on Version 2 */
+#define  LCD_CLK_ENABLE_REG			0x6c
+#define  LCD_CLK_RESET_REG			0x70
+#define  LCD_CLK_MAIN_RESET			BIT(3)
+
+#define LCD_NUM_BUFFERS	2
+
+#define PALETTE_SIZE	256
+
+#define	CLK_MIN_DIV	2
+#define	CLK_MAX_DIV	255
+
+static void __iomem *da8xx_fb_reg_base;
+static unsigned int lcd_revision;
+static irq_handler_t lcdc_irq_handler;
+static wait_queue_head_t frame_done_wq;
+static int frame_done_flag;
+
+static unsigned int lcdc_read(unsigned int addr)
+{
+	return (unsigned int)__raw_readl(da8xx_fb_reg_base + (addr));
+}
+
+static void lcdc_write(unsigned int val, unsigned int addr)
+{
+	__raw_writel(val, da8xx_fb_reg_base + (addr));
+}
+
+struct da8xx_fb_par {
+	struct device		*dev;
+	dma_addr_t		p_palette_base;
+	unsigned char *v_palette_base;
+	dma_addr_t		vram_phys;
+	unsigned long		vram_size;
+	void			*vram_virt;
+	unsigned int		dma_start;
+	unsigned int		dma_end;
+	struct clk *lcdc_clk;
+	int irq;
+	unsigned int palette_sz;
+	int blank;
+	wait_queue_head_t	vsync_wait;
+	int			vsync_flag;
+	int			vsync_timeout;
+	spinlock_t		lock_for_chan_update;
+
+	/*
+	 * LCDC has 2 ping pong DMA channels, channel 0
+	 * and channel 1.
+	 */
+	unsigned int		which_dma_channel_done;
+#ifdef CONFIG_CPU_FREQ
+	struct notifier_block	freq_transition;
+#endif
+	unsigned int		lcdc_clk_rate;
+	struct regulator	*lcd_supply;
+	u32 pseudo_palette[16];
+	struct fb_videomode	mode;
+	struct lcd_ctrl_config	cfg;
+};
+
+static struct fb_var_screeninfo da8xx_fb_var;
+
+static struct fb_fix_screeninfo da8xx_fb_fix = {
+	.id = "DA8xx FB Drv",
+	.type = FB_TYPE_PACKED_PIXELS,
+	.type_aux = 0,
+	.visual = FB_VISUAL_PSEUDOCOLOR,
+	.xpanstep = 0,
+	.ypanstep = 1,
+	.ywrapstep = 0,
+	.accel = FB_ACCEL_NONE
+};
+
+static struct fb_videomode known_lcd_panels[] = {
+	/* Sharp LCD035Q3DG01 */
+	[0] = {
+		.name           = "Sharp_LCD035Q3DG01",
+		.xres           = 320,
+		.yres           = 240,
+		.pixclock       = KHZ2PICOS(4607),
+		.left_margin    = 6,
+		.right_margin   = 8,
+		.upper_margin   = 2,
+		.lower_margin   = 2,
+		.hsync_len      = 0,
+		.vsync_len      = 0,
+		.sync           = FB_SYNC_CLK_INVERT,
+	},
+	/* Sharp LK043T1DG01 */
+	[1] = {
+		.name           = "Sharp_LK043T1DG01",
+		.xres           = 480,
+		.yres           = 272,
+		.pixclock       = KHZ2PICOS(7833),
+		.left_margin    = 2,
+		.right_margin   = 2,
+		.upper_margin   = 2,
+		.lower_margin   = 2,
+		.hsync_len      = 41,
+		.vsync_len      = 10,
+		.sync           = 0,
+		.flag           = 0,
+	},
+	[2] = {
+		/* Hitachi SP10Q010 */
+		.name           = "SP10Q010",
+		.xres           = 320,
+		.yres           = 240,
+		.pixclock       = KHZ2PICOS(7833),
+		.left_margin    = 10,
+		.right_margin   = 10,
+		.upper_margin   = 10,
+		.lower_margin   = 10,
+		.hsync_len      = 10,
+		.vsync_len      = 10,
+		.sync           = 0,
+		.flag           = 0,
+	},
+	[3] = {
+		/* Densitron 84-0023-001T */
+		.name           = "Densitron_84-0023-001T",
+		.xres           = 320,
+		.yres           = 240,
+		.pixclock       = KHZ2PICOS(6400),
+		.left_margin    = 0,
+		.right_margin   = 0,
+		.upper_margin   = 0,
+		.lower_margin   = 0,
+		.hsync_len      = 30,
+		.vsync_len      = 3,
+		.sync           = 0,
+	},
+};
+
+static bool da8xx_fb_is_raster_enabled(void)
+{
+	return !!(lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE);
+}
+
+/* Enable the Raster Engine of the LCD Controller */
+static void lcd_enable_raster(void)
+{
+	u32 reg;
+
+	/* Put LCDC in reset for several cycles */
+	if (lcd_revision == LCD_VERSION_2)
+		/* Write 1 to reset LCDC */
+		lcdc_write(LCD_CLK_MAIN_RESET, LCD_CLK_RESET_REG);
+	mdelay(1);
+
+	/* Bring LCDC out of reset */
+	if (lcd_revision == LCD_VERSION_2)
+		lcdc_write(0, LCD_CLK_RESET_REG);
+	mdelay(1);
+
+	/* Above reset sequence doesnot reset register context */
+	reg = lcdc_read(LCD_RASTER_CTRL_REG);
+	if (!(reg & LCD_RASTER_ENABLE))
+		lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
+}
+
+/* Disable the Raster Engine of the LCD Controller */
+static void lcd_disable_raster(enum da8xx_frame_complete wait_for_frame_done)
+{
+	u32 reg;
+	int ret;
+
+	reg = lcdc_read(LCD_RASTER_CTRL_REG);
+	if (reg & LCD_RASTER_ENABLE)
+		lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
+	else
+		/* return if already disabled */
+		return;
+
+	if ((wait_for_frame_done == DA8XX_FRAME_WAIT) &&
+			(lcd_revision == LCD_VERSION_2)) {
+		frame_done_flag = 0;
+		ret = wait_event_interruptible_timeout(frame_done_wq,
+				frame_done_flag != 0,
+				msecs_to_jiffies(50));
+		if (ret == 0)
+			pr_err("LCD Controller timed out\n");
+	}
+}
+
+static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
+{
+	u32 start;
+	u32 end;
+	u32 reg_ras;
+	u32 reg_dma;
+	u32 reg_int;
+
+	/* init reg to clear PLM (loading mode) fields */
+	reg_ras = lcdc_read(LCD_RASTER_CTRL_REG);
+	reg_ras &= ~(3 << 20);
+
+	reg_dma  = lcdc_read(LCD_DMA_CTRL_REG);
+
+	if (load_mode == LOAD_DATA) {
+		start    = par->dma_start;
+		end      = par->dma_end;
+
+		reg_ras |= LCD_PALETTE_LOAD_MODE(DATA_ONLY);
+		if (lcd_revision == LCD_VERSION_1) {
+			reg_dma |= LCD_V1_END_OF_FRAME_INT_ENA;
+		} else {
+			reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
+				LCD_V2_END_OF_FRAME0_INT_ENA |
+				LCD_V2_END_OF_FRAME1_INT_ENA |
+				LCD_FRAME_DONE | LCD_SYNC_LOST;
+			lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
+		}
+		reg_dma |= LCD_DUAL_FRAME_BUFFER_ENABLE;
+
+		lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
+		lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
+		lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
+		lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
+	} else if (load_mode == LOAD_PALETTE) {
+		start    = par->p_palette_base;
+		end      = start + par->palette_sz - 1;
+
+		reg_ras |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
+
+		if (lcd_revision == LCD_VERSION_1) {
+			reg_ras |= LCD_V1_PL_INT_ENA;
+		} else {
+			reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
+				LCD_V2_PL_INT_ENA;
+			lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
+		}
+
+		lcdc_write(start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
+		lcdc_write(end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
+	}
+
+	lcdc_write(reg_dma, LCD_DMA_CTRL_REG);
+	lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
+
+	/*
+	 * The Raster enable bit must be set after all other control fields are
+	 * set.
+	 */
+	lcd_enable_raster();
+}
+
+/* Configure the Burst Size and fifo threhold of DMA */
+static int lcd_cfg_dma(int burst_size, int fifo_th)
+{
+	u32 reg;
+
+	reg = lcdc_read(LCD_DMA_CTRL_REG) & 0x00000001;
+	switch (burst_size) {
+	case 1:
+		reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
+		break;
+	case 2:
+		reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
+		break;
+	case 4:
+		reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
+		break;
+	case 8:
+		reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
+		break;
+	case 16:
+	default:
+		reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
+		break;
+	}
+
+	reg |= (fifo_th << 8);
+
+	lcdc_write(reg, LCD_DMA_CTRL_REG);
+
+	return 0;
+}
+
+static void lcd_cfg_ac_bias(int period, int transitions_per_int)
+{
+	u32 reg;
+
+	/* Set the AC Bias Period and Number of Transisitons per Interrupt */
+	reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & 0xFFF00000;
+	reg |= LCD_AC_BIAS_FREQUENCY(period) |
+		LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
+	lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
+}
+
+static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
+		int front_porch)
+{
+	u32 reg;
+
+	reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0x3ff;
+	reg |= (((back_porch-1) & 0xff) << 24)
+	    | (((front_porch-1) & 0xff) << 16)
+	    | (((pulse_width-1) & 0x3f) << 10);
+	lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
+
+	/*
+	 * LCDC Version 2 adds some extra bits that increase the allowable
+	 * size of the horizontal timing registers.
+	 * remember that the registers use 0 to represent 1 so all values
+	 * that get set into register need to be decremented by 1
+	 */
+	if (lcd_revision == LCD_VERSION_2) {
+		/* Mask off the bits we want to change */
+		reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & ~0x780000ff;
+		reg |= ((front_porch-1) & 0x300) >> 8;
+		reg |= ((back_porch-1) & 0x300) >> 4;
+		reg |= ((pulse_width-1) & 0x3c0) << 21;
+		lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
+	}
+}
+
+static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
+		int front_porch)
+{
+	u32 reg;
+
+	reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff;
+	reg |= ((back_porch & 0xff) << 24)
+	    | ((front_porch & 0xff) << 16)
+	    | (((pulse_width-1) & 0x3f) << 10);
+	lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
+}
+
+static int lcd_cfg_display(const struct lcd_ctrl_config *cfg,
+		struct fb_videomode *panel)
+{
+	u32 reg;
+	u32 reg_int;
+
+	reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE |
+						LCD_MONO_8BIT_MODE |
+						LCD_MONOCHROME_MODE);
+
+	switch (cfg->panel_shade) {
+	case MONOCHROME:
+		reg |= LCD_MONOCHROME_MODE;
+		if (cfg->mono_8bit_mode)
+			reg |= LCD_MONO_8BIT_MODE;
+		break;
+	case COLOR_ACTIVE:
+		reg |= LCD_TFT_MODE;
+		if (cfg->tft_alt_mode)
+			reg |= LCD_TFT_ALT_ENABLE;
+		break;
+
+	case COLOR_PASSIVE:
+		/* AC bias applicable only for Pasive panels */
+		lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
+		if (cfg->bpp == 12 && cfg->stn_565_mode)
+			reg |= LCD_STN_565_ENABLE;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	/* enable additional interrupts here */
+	if (lcd_revision == LCD_VERSION_1) {
+		reg |= LCD_V1_UNDERFLOW_INT_ENA;
+	} else {
+		reg_int = lcdc_read(LCD_INT_ENABLE_SET_REG) |
+			LCD_V2_UNDERFLOW_INT_ENA;
+		lcdc_write(reg_int, LCD_INT_ENABLE_SET_REG);
+	}
+
+	lcdc_write(reg, LCD_RASTER_CTRL_REG);
+
+	reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
+
+	reg |= LCD_SYNC_CTRL;
+
+	if (cfg->sync_edge)
+		reg |= LCD_SYNC_EDGE;
+	else
+		reg &= ~LCD_SYNC_EDGE;
+
+	if ((panel->sync & FB_SYNC_HOR_HIGH_ACT) == 0)
+		reg |= LCD_INVERT_LINE_CLOCK;
+	else
+		reg &= ~LCD_INVERT_LINE_CLOCK;
+
+	if ((panel->sync & FB_SYNC_VERT_HIGH_ACT) == 0)
+		reg |= LCD_INVERT_FRAME_CLOCK;
+	else
+		reg &= ~LCD_INVERT_FRAME_CLOCK;
+
+	lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
+
+	return 0;
+}
+
+static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
+		u32 bpp, u32 raster_order)
+{
+	u32 reg;
+
+	if (bpp > 16 && lcd_revision == LCD_VERSION_1)
+		return -EINVAL;
+
+	/* Set the Panel Width */
+	/* Pixels per line = (PPL + 1)*16 */
+	if (lcd_revision == LCD_VERSION_1) {
+		/*
+		 * 0x3F in bits 4..9 gives max horizontal resolution = 1024
+		 * pixels.
+		 */
+		width &= 0x3f0;
+	} else {
+		/*
+		 * 0x7F in bits 4..10 gives max horizontal resolution = 2048
+		 * pixels.
+		 */
+		width &= 0x7f0;
+	}
+
+	reg = lcdc_read(LCD_RASTER_TIMING_0_REG);
+	reg &= 0xfffffc00;
+	if (lcd_revision == LCD_VERSION_1) {
+		reg |= ((width >> 4) - 1) << 4;
+	} else {
+		width = (width >> 4) - 1;
+		reg |= ((width & 0x3f) << 4) | ((width & 0x40) >> 3);
+	}
+	lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
+
+	/* Set the Panel Height */
+	/* Set bits 9:0 of Lines Per Pixel */
+	reg = lcdc_read(LCD_RASTER_TIMING_1_REG);
+	reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
+	lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
+
+	/* Set bit 10 of Lines Per Pixel */
+	if (lcd_revision == LCD_VERSION_2) {
+		reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
+		reg |= ((height - 1) & 0x400) << 16;
+		lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
+	}
+
+	/* Set the Raster Order of the Frame Buffer */
+	reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
+	if (raster_order)
+		reg |= LCD_RASTER_ORDER;
+
+	par->palette_sz = 16 * 2;
+
+	switch (bpp) {
+	case 1:
+	case 2:
+	case 4:
+	case 16:
+		break;
+	case 24:
+		reg |= LCD_V2_TFT_24BPP_MODE;
+		break;
+	case 32:
+		reg |= LCD_V2_TFT_24BPP_MODE;
+		reg |= LCD_V2_TFT_24BPP_UNPACK;
+		break;
+	case 8:
+		par->palette_sz = 256 * 2;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	lcdc_write(reg, LCD_RASTER_CTRL_REG);
+
+	return 0;
+}
+
+#define CNVT_TOHW(val, width) ((((val) << (width)) + 0x7FFF - (val)) >> 16)
+static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
+			      unsigned blue, unsigned transp,
+			      struct fb_info *info)
+{
+	struct da8xx_fb_par *par = info->par;
+	unsigned short *palette = (unsigned short *) par->v_palette_base;
+	u_short pal;
+	int update_hw = 0;
+
+	if (regno > 255)
+		return 1;
+
+	if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
+		return 1;
+
+	if (info->var.bits_per_pixel > 16 && lcd_revision == LCD_VERSION_1)
+		return -EINVAL;
+
+	switch (info->fix.visual) {
+	case FB_VISUAL_TRUECOLOR:
+		red = CNVT_TOHW(red, info->var.red.length);
+		green = CNVT_TOHW(green, info->var.green.length);
+		blue = CNVT_TOHW(blue, info->var.blue.length);
+		break;
+	case FB_VISUAL_PSEUDOCOLOR:
+		switch (info->var.bits_per_pixel) {
+		case 4:
+			if (regno > 15)
+				return -EINVAL;
+
+			if (info->var.grayscale) {
+				pal = regno;
+			} else {
+				red >>= 4;
+				green >>= 8;
+				blue >>= 12;
+
+				pal = red & 0x0f00;
+				pal |= green & 0x00f0;
+				pal |= blue & 0x000f;
+			}
+			if (regno == 0)
+				pal |= 0x2000;
+			palette[regno] = pal;
+			break;
+
+		case 8:
+			red >>= 4;
+			green >>= 8;
+			blue >>= 12;
+
+			pal = (red & 0x0f00);
+			pal |= (green & 0x00f0);
+			pal |= (blue & 0x000f);
+
+			if (palette[regno] != pal) {
+				update_hw = 1;
+				palette[regno] = pal;
+			}
+			break;
+		}
+		break;
+	}
+
+	/* Truecolor has hardware independent palette */
+	if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
+		u32 v;
+
+		if (regno > 15)
+			return -EINVAL;
+
+		v = (red << info->var.red.offset) |
+			(green << info->var.green.offset) |
+			(blue << info->var.blue.offset);
+
+		((u32 *) (info->pseudo_palette))[regno] = v;
+		if (palette[0] != 0x4000) {
+			update_hw = 1;
+			palette[0] = 0x4000;
+		}
+	}
+
+	/* Update the palette in the h/w as needed. */
+	if (update_hw)
+		lcd_blit(LOAD_PALETTE, par);
+
+	return 0;
+}
+#undef CNVT_TOHW
+
+static void da8xx_fb_lcd_reset(void)
+{
+	/* DMA has to be disabled */
+	lcdc_write(0, LCD_DMA_CTRL_REG);
+	lcdc_write(0, LCD_RASTER_CTRL_REG);
+
+	if (lcd_revision == LCD_VERSION_2) {
+		lcdc_write(0, LCD_INT_ENABLE_SET_REG);
+		/* Write 1 to reset */
+		lcdc_write(LCD_CLK_MAIN_RESET, LCD_CLK_RESET_REG);
+		lcdc_write(0, LCD_CLK_RESET_REG);
+	}
+}
+
+static int da8xx_fb_config_clk_divider(struct da8xx_fb_par *par,
+					      unsigned lcdc_clk_div,
+					      unsigned lcdc_clk_rate)
+{
+	int ret;
+
+	if (par->lcdc_clk_rate != lcdc_clk_rate) {
+		ret = clk_set_rate(par->lcdc_clk, lcdc_clk_rate);
+		if (ret) {
+			dev_err(par->dev,
+				"unable to set clock rate at %u\n",
+				lcdc_clk_rate);
+			return ret;
+		}
+		par->lcdc_clk_rate = clk_get_rate(par->lcdc_clk);
+	}
+
+	/* Configure the LCD clock divisor. */
+	lcdc_write(LCD_CLK_DIVISOR(lcdc_clk_div) |
+			(LCD_RASTER_MODE & 0x1), LCD_CTRL_REG);
+
+	if (lcd_revision == LCD_VERSION_2)
+		lcdc_write(LCD_V2_DMA_CLK_EN | LCD_V2_LIDD_CLK_EN |
+				LCD_V2_CORE_CLK_EN, LCD_CLK_ENABLE_REG);
+
+	return 0;
+}
+
+static unsigned int da8xx_fb_calc_clk_divider(struct da8xx_fb_par *par,
+					      unsigned pixclock,
+					      unsigned *lcdc_clk_rate)
+{
+	unsigned lcdc_clk_div;
+
+	pixclock = PICOS2KHZ(pixclock) * 1000;
+
+	*lcdc_clk_rate = par->lcdc_clk_rate;
+
+	if (pixclock < (*lcdc_clk_rate / CLK_MAX_DIV)) {
+		*lcdc_clk_rate = clk_round_rate(par->lcdc_clk,
+						pixclock * CLK_MAX_DIV);
+		lcdc_clk_div = CLK_MAX_DIV;
+	} else if (pixclock > (*lcdc_clk_rate / CLK_MIN_DIV)) {
+		*lcdc_clk_rate = clk_round_rate(par->lcdc_clk,
+						pixclock * CLK_MIN_DIV);
+		lcdc_clk_div = CLK_MIN_DIV;
+	} else {
+		lcdc_clk_div = *lcdc_clk_rate / pixclock;
+	}
+
+	return lcdc_clk_div;
+}
+
+static int da8xx_fb_calc_config_clk_divider(struct da8xx_fb_par *par,
+					    struct fb_videomode *mode)
+{
+	unsigned lcdc_clk_rate;
+	unsigned lcdc_clk_div = da8xx_fb_calc_clk_divider(par, mode->pixclock,
+							  &lcdc_clk_rate);
+
+	return da8xx_fb_config_clk_divider(par, lcdc_clk_div, lcdc_clk_rate);
+}
+
+static unsigned da8xx_fb_round_clk(struct da8xx_fb_par *par,
+					  unsigned pixclock)
+{
+	unsigned lcdc_clk_div, lcdc_clk_rate;
+
+	lcdc_clk_div = da8xx_fb_calc_clk_divider(par, pixclock, &lcdc_clk_rate);
+	return KHZ2PICOS(lcdc_clk_rate / (1000 * lcdc_clk_div));
+}
+
+static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
+		struct fb_videomode *panel)
+{
+	u32 bpp;
+	int ret = 0;
+
+	ret = da8xx_fb_calc_config_clk_divider(par, panel);
+	if (ret) {
+		dev_err(par->dev, "unable to configure clock\n");
+		return ret;
+	}
+
+	if (panel->sync & FB_SYNC_CLK_INVERT)
+		lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) |
+			LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
+	else
+		lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) &
+			~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
+
+	/* Configure the DMA burst size and fifo threshold. */
+	ret = lcd_cfg_dma(cfg->dma_burst_sz, cfg->fifo_th);
+	if (ret < 0)
+		return ret;
+
+	/* Configure the vertical and horizontal sync properties. */
+	lcd_cfg_vertical_sync(panel->upper_margin, panel->vsync_len,
+			panel->lower_margin);
+	lcd_cfg_horizontal_sync(panel->left_margin, panel->hsync_len,
+			panel->right_margin);
+
+	/* Configure for disply */
+	ret = lcd_cfg_display(cfg, panel);
+	if (ret < 0)
+		return ret;
+
+	bpp = cfg->bpp;
+
+	if (bpp == 12)
+		bpp = 16;
+	ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->xres,
+				(unsigned int)panel->yres, bpp,
+				cfg->raster_order);
+	if (ret < 0)
+		return ret;
+
+	/* Configure FDD */
+	lcdc_write((lcdc_read(LCD_RASTER_CTRL_REG) & 0xfff00fff) |
+		       (cfg->fdd << 12), LCD_RASTER_CTRL_REG);
+
+	return 0;
+}
+
+/* IRQ handler for version 2 of LCDC */
+static irqreturn_t lcdc_irq_handler_rev02(int irq, void *arg)
+{
+	struct da8xx_fb_par *par = arg;
+	u32 stat = lcdc_read(LCD_MASKED_STAT_REG);
+
+	if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
+		lcd_disable_raster(DA8XX_FRAME_NOWAIT);
+		lcdc_write(stat, LCD_MASKED_STAT_REG);
+		lcd_enable_raster();
+	} else if (stat & LCD_PL_LOAD_DONE) {
+		/*
+		 * Must disable raster before changing state of any control bit.
+		 * And also must be disabled before clearing the PL loading
+		 * interrupt via the following write to the status register. If
+		 * this is done after then one gets multiple PL done interrupts.
+		 */
+		lcd_disable_raster(DA8XX_FRAME_NOWAIT);
+
+		lcdc_write(stat, LCD_MASKED_STAT_REG);
+
+		/* Disable PL completion interrupt */
+		lcdc_write(LCD_V2_PL_INT_ENA, LCD_INT_ENABLE_CLR_REG);
+
+		/* Setup and start data loading mode */
+		lcd_blit(LOAD_DATA, par);
+	} else {
+		lcdc_write(stat, LCD_MASKED_STAT_REG);
+
+		if (stat & LCD_END_OF_FRAME0) {
+			par->which_dma_channel_done = 0;
+			lcdc_write(par->dma_start,
+				   LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
+			lcdc_write(par->dma_end,
+				   LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
+			par->vsync_flag = 1;
+			wake_up_interruptible(&par->vsync_wait);
+		}
+
+		if (stat & LCD_END_OF_FRAME1) {
+			par->which_dma_channel_done = 1;
+			lcdc_write(par->dma_start,
+				   LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
+			lcdc_write(par->dma_end,
+				   LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
+			par->vsync_flag = 1;
+			wake_up_interruptible(&par->vsync_wait);
+		}
+
+		/* Set only when controller is disabled and at the end of
+		 * active frame
+		 */
+		if (stat & BIT(0)) {
+			frame_done_flag = 1;
+			wake_up_interruptible(&frame_done_wq);
+		}
+	}
+
+	lcdc_write(0, LCD_END_OF_INT_IND_REG);
+	return IRQ_HANDLED;
+}
+
+/* IRQ handler for version 1 LCDC */
+static irqreturn_t lcdc_irq_handler_rev01(int irq, void *arg)
+{
+	struct da8xx_fb_par *par = arg;
+	u32 stat = lcdc_read(LCD_STAT_REG);
+	u32 reg_ras;
+
+	if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
+		lcd_disable_raster(DA8XX_FRAME_NOWAIT);
+		lcdc_write(stat, LCD_STAT_REG);
+		lcd_enable_raster();
+	} else if (stat & LCD_PL_LOAD_DONE) {
+		/*
+		 * Must disable raster before changing state of any control bit.
+		 * And also must be disabled before clearing the PL loading
+		 * interrupt via the following write to the status register. If
+		 * this is done after then one gets multiple PL done interrupts.
+		 */
+		lcd_disable_raster(DA8XX_FRAME_NOWAIT);
+
+		lcdc_write(stat, LCD_STAT_REG);
+
+		/* Disable PL completion inerrupt */
+		reg_ras  = lcdc_read(LCD_RASTER_CTRL_REG);
+		reg_ras &= ~LCD_V1_PL_INT_ENA;
+		lcdc_write(reg_ras, LCD_RASTER_CTRL_REG);
+
+		/* Setup and start data loading mode */
+		lcd_blit(LOAD_DATA, par);
+	} else {
+		lcdc_write(stat, LCD_STAT_REG);
+
+		if (stat & LCD_END_OF_FRAME0) {
+			par->which_dma_channel_done = 0;
+			lcdc_write(par->dma_start,
+				   LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
+			lcdc_write(par->dma_end,
+				   LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
+			par->vsync_flag = 1;
+			wake_up_interruptible(&par->vsync_wait);
+		}
+
+		if (stat & LCD_END_OF_FRAME1) {
+			par->which_dma_channel_done = 1;
+			lcdc_write(par->dma_start,
+				   LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
+			lcdc_write(par->dma_end,
+				   LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
+			par->vsync_flag = 1;
+			wake_up_interruptible(&par->vsync_wait);
+		}
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int fb_check_var(struct fb_var_screeninfo *var,
+			struct fb_info *info)
+{
+	int err = 0;
+	struct da8xx_fb_par *par = info->par;
+	int bpp = var->bits_per_pixel >> 3;
+	unsigned long line_size = var->xres_virtual * bpp;
+
+	if (var->bits_per_pixel > 16 && lcd_revision == LCD_VERSION_1)
+		return -EINVAL;
+
+	switch (var->bits_per_pixel) {
+	case 1:
+	case 8:
+		var->red.offset = 0;
+		var->red.length = 8;
+		var->green.offset = 0;
+		var->green.length = 8;
+		var->blue.offset = 0;
+		var->blue.length = 8;
+		var->transp.offset = 0;
+		var->transp.length = 0;
+		var->nonstd = 0;
+		break;
+	case 4:
+		var->red.offset = 0;
+		var->red.length = 4;
+		var->green.offset = 0;
+		var->green.length = 4;
+		var->blue.offset = 0;
+		var->blue.length = 4;
+		var->transp.offset = 0;
+		var->transp.length = 0;
+		var->nonstd = FB_NONSTD_REV_PIX_IN_B;
+		break;
+	case 16:		/* RGB 565 */
+		var->red.offset = 11;
+		var->red.length = 5;
+		var->green.offset = 5;
+		var->green.length = 6;
+		var->blue.offset = 0;
+		var->blue.length = 5;
+		var->transp.offset = 0;
+		var->transp.length = 0;
+		var->nonstd = 0;
+		break;
+	case 24:
+		var->red.offset = 16;
+		var->red.length = 8;
+		var->green.offset = 8;
+		var->green.length = 8;
+		var->blue.offset = 0;
+		var->blue.length = 8;
+		var->nonstd = 0;
+		break;
+	case 32:
+		var->transp.offset = 24;
+		var->transp.length = 8;
+		var->red.offset = 16;
+		var->red.length = 8;
+		var->green.offset = 8;
+		var->green.length = 8;
+		var->blue.offset = 0;
+		var->blue.length = 8;
+		var->nonstd = 0;
+		break;
+	default:
+		err = -EINVAL;
+	}
+
+	var->red.msb_right = 0;
+	var->green.msb_right = 0;
+	var->blue.msb_right = 0;
+	var->transp.msb_right = 0;
+
+	if (line_size * var->yres_virtual > par->vram_size)
+		var->yres_virtual = par->vram_size / line_size;
+
+	if (var->yres > var->yres_virtual)
+		var->yres = var->yres_virtual;
+
+	if (var->xres > var->xres_virtual)
+		var->xres = var->xres_virtual;
+
+	if (var->xres + var->xoffset > var->xres_virtual)
+		var->xoffset = var->xres_virtual - var->xres;
+	if (var->yres + var->yoffset > var->yres_virtual)
+		var->yoffset = var->yres_virtual - var->yres;
+
+	var->pixclock = da8xx_fb_round_clk(par, var->pixclock);
+
+	return err;
+}
+
+#ifdef CONFIG_CPU_FREQ
+static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb,
+				     unsigned long val, void *data)
+{
+	struct da8xx_fb_par *par;
+
+	par = container_of(nb, struct da8xx_fb_par, freq_transition);
+	if (val == CPUFREQ_POSTCHANGE) {
+		if (par->lcdc_clk_rate != clk_get_rate(par->lcdc_clk)) {
+			par->lcdc_clk_rate = clk_get_rate(par->lcdc_clk);
+			lcd_disable_raster(DA8XX_FRAME_WAIT);
+			da8xx_fb_calc_config_clk_divider(par, &par->mode);
+			if (par->blank == FB_BLANK_UNBLANK)
+				lcd_enable_raster();
+		}
+	}
+
+	return 0;
+}
+
+static int lcd_da8xx_cpufreq_register(struct da8xx_fb_par *par)
+{
+	par->freq_transition.notifier_call = lcd_da8xx_cpufreq_transition;
+
+	return cpufreq_register_notifier(&par->freq_transition,
+					 CPUFREQ_TRANSITION_NOTIFIER);
+}
+
+static void lcd_da8xx_cpufreq_deregister(struct da8xx_fb_par *par)
+{
+	cpufreq_unregister_notifier(&par->freq_transition,
+				    CPUFREQ_TRANSITION_NOTIFIER);
+}
+#endif
+
+static int fb_remove(struct platform_device *dev)
+{
+	struct fb_info *info = platform_get_drvdata(dev);
+	struct da8xx_fb_par *par = info->par;
+	int ret;
+
+#ifdef CONFIG_CPU_FREQ
+	lcd_da8xx_cpufreq_deregister(par);
+#endif
+	if (par->lcd_supply) {
+		ret = regulator_disable(par->lcd_supply);
+		if (ret)
+			dev_warn(&dev->dev, "Failed to disable regulator (%pe)\n",
+				 ERR_PTR(ret));
+	}
+
+	lcd_disable_raster(DA8XX_FRAME_WAIT);
+	lcdc_write(0, LCD_RASTER_CTRL_REG);
+
+	/* disable DMA  */
+	lcdc_write(0, LCD_DMA_CTRL_REG);
+
+	unregister_framebuffer(info);
+	fb_dealloc_cmap(&info->cmap);
+	pm_runtime_put_sync(&dev->dev);
+	pm_runtime_disable(&dev->dev);
+	framebuffer_release(info);
+
+	return 0;
+}
+
+/*
+ * Function to wait for vertical sync which for this LCD peripheral
+ * translates into waiting for the current raster frame to complete.
+ */
+static int fb_wait_for_vsync(struct fb_info *info)
+{
+	struct da8xx_fb_par *par = info->par;
+	int ret;
+
+	/*
+	 * Set flag to 0 and wait for isr to set to 1. It would seem there is a
+	 * race condition here where the ISR could have occurred just before or
+	 * just after this set. But since we are just coarsely waiting for
+	 * a frame to complete then that's OK. i.e. if the frame completed
+	 * just before this code executed then we have to wait another full
+	 * frame time but there is no way to avoid such a situation. On the
+	 * other hand if the frame completed just after then we don't need
+	 * to wait long at all. Either way we are guaranteed to return to the
+	 * user immediately after a frame completion which is all that is
+	 * required.
+	 */
+	par->vsync_flag = 0;
+	ret = wait_event_interruptible_timeout(par->vsync_wait,
+					       par->vsync_flag != 0,
+					       par->vsync_timeout);
+	if (ret < 0)
+		return ret;
+	if (ret == 0)
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
+static int fb_ioctl(struct fb_info *info, unsigned int cmd,
+			  unsigned long arg)
+{
+	struct lcd_sync_arg sync_arg;
+
+	switch (cmd) {
+	case FBIOGET_CONTRAST:
+	case FBIOPUT_CONTRAST:
+	case FBIGET_BRIGHTNESS:
+	case FBIPUT_BRIGHTNESS:
+	case FBIGET_COLOR:
+	case FBIPUT_COLOR:
+		return -ENOTTY;
+	case FBIPUT_HSYNC:
+		if (copy_from_user(&sync_arg, (char *)arg,
+				sizeof(struct lcd_sync_arg)))
+			return -EFAULT;
+		lcd_cfg_horizontal_sync(sync_arg.back_porch,
+					sync_arg.pulse_width,
+					sync_arg.front_porch);
+		break;
+	case FBIPUT_VSYNC:
+		if (copy_from_user(&sync_arg, (char *)arg,
+				sizeof(struct lcd_sync_arg)))
+			return -EFAULT;
+		lcd_cfg_vertical_sync(sync_arg.back_porch,
+					sync_arg.pulse_width,
+					sync_arg.front_porch);
+		break;
+	case FBIO_WAITFORVSYNC:
+		return fb_wait_for_vsync(info);
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int cfb_blank(int blank, struct fb_info *info)
+{
+	struct da8xx_fb_par *par = info->par;
+	int ret = 0;
+
+	if (par->blank == blank)
+		return 0;
+
+	par->blank = blank;
+	switch (blank) {
+	case FB_BLANK_UNBLANK:
+		lcd_enable_raster();
+
+		if (par->lcd_supply) {
+			ret = regulator_enable(par->lcd_supply);
+			if (ret)
+				return ret;
+		}
+		break;
+	case FB_BLANK_NORMAL:
+	case FB_BLANK_VSYNC_SUSPEND:
+	case FB_BLANK_HSYNC_SUSPEND:
+	case FB_BLANK_POWERDOWN:
+		if (par->lcd_supply) {
+			ret = regulator_disable(par->lcd_supply);
+			if (ret)
+				return ret;
+		}
+
+		lcd_disable_raster(DA8XX_FRAME_WAIT);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+/*
+ * Set new x,y offsets in the virtual display for the visible area and switch
+ * to the new mode.
+ */
+static int da8xx_pan_display(struct fb_var_screeninfo *var,
+			     struct fb_info *fbi)
+{
+	int ret = 0;
+	struct fb_var_screeninfo new_var;
+	struct da8xx_fb_par         *par = fbi->par;
+	struct fb_fix_screeninfo    *fix = &fbi->fix;
+	unsigned int end;
+	unsigned int start;
+	unsigned long irq_flags;
+
+	if (var->xoffset != fbi->var.xoffset ||
+			var->yoffset != fbi->var.yoffset) {
+		memcpy(&new_var, &fbi->var, sizeof(new_var));
+		new_var.xoffset = var->xoffset;
+		new_var.yoffset = var->yoffset;
+		if (fb_check_var(&new_var, fbi))
+			ret = -EINVAL;
+		else {
+			memcpy(&fbi->var, &new_var, sizeof(new_var));
+
+			start	= fix->smem_start +
+				new_var.yoffset * fix->line_length +
+				new_var.xoffset * fbi->var.bits_per_pixel / 8;
+			end	= start + fbi->var.yres * fix->line_length - 1;
+			par->dma_start	= start;
+			par->dma_end	= end;
+			spin_lock_irqsave(&par->lock_for_chan_update,
+					irq_flags);
+			if (par->which_dma_channel_done == 0) {
+				lcdc_write(par->dma_start,
+					   LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
+				lcdc_write(par->dma_end,
+					   LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
+			} else if (par->which_dma_channel_done == 1) {
+				lcdc_write(par->dma_start,
+					   LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
+				lcdc_write(par->dma_end,
+					   LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
+			}
+			spin_unlock_irqrestore(&par->lock_for_chan_update,
+					irq_flags);
+		}
+	}
+
+	return ret;
+}
+
+static int da8xxfb_set_par(struct fb_info *info)
+{
+	struct da8xx_fb_par *par = info->par;
+	int ret;
+	bool raster = da8xx_fb_is_raster_enabled();
+
+	if (raster)
+		lcd_disable_raster(DA8XX_FRAME_WAIT);
+
+	fb_var_to_videomode(&par->mode, &info->var);
+
+	par->cfg.bpp = info->var.bits_per_pixel;
+
+	info->fix.visual = (par->cfg.bpp <= 8) ?
+				FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
+	info->fix.line_length = (par->mode.xres * par->cfg.bpp) / 8;
+
+	ret = lcd_init(par, &par->cfg, &par->mode);
+	if (ret < 0) {
+		dev_err(par->dev, "lcd init failed\n");
+		return ret;
+	}
+
+	par->dma_start = info->fix.smem_start +
+			 info->var.yoffset * info->fix.line_length +
+			 info->var.xoffset * info->var.bits_per_pixel / 8;
+	par->dma_end   = par->dma_start +
+			 info->var.yres * info->fix.line_length - 1;
+
+	lcdc_write(par->dma_start, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
+	lcdc_write(par->dma_end, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
+	lcdc_write(par->dma_start, LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
+	lcdc_write(par->dma_end, LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
+
+	if (raster)
+		lcd_enable_raster();
+
+	return 0;
+}
+
+static const struct fb_ops da8xx_fb_ops = {
+	.owner = THIS_MODULE,
+	.fb_check_var = fb_check_var,
+	.fb_set_par = da8xxfb_set_par,
+	.fb_setcolreg = fb_setcolreg,
+	.fb_pan_display = da8xx_pan_display,
+	.fb_ioctl = fb_ioctl,
+	.fb_fillrect = cfb_fillrect,
+	.fb_copyarea = cfb_copyarea,
+	.fb_imageblit = cfb_imageblit,
+	.fb_blank = cfb_blank,
+};
+
+static struct fb_videomode *da8xx_fb_get_videomode(struct platform_device *dev)
+{
+	struct da8xx_lcdc_platform_data *fb_pdata = dev_get_platdata(&dev->dev);
+	struct fb_videomode *lcdc_info;
+	int i;
+
+	for (i = 0, lcdc_info = known_lcd_panels;
+		i < ARRAY_SIZE(known_lcd_panels); i++, lcdc_info++) {
+		if (strcmp(fb_pdata->type, lcdc_info->name) == 0)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(known_lcd_panels)) {
+		dev_err(&dev->dev, "no panel found\n");
+		return NULL;
+	}
+	dev_info(&dev->dev, "found %s panel\n", lcdc_info->name);
+
+	return lcdc_info;
+}
+
+static int fb_probe(struct platform_device *device)
+{
+	struct da8xx_lcdc_platform_data *fb_pdata =
+						dev_get_platdata(&device->dev);
+	struct lcd_ctrl_config *lcd_cfg;
+	struct fb_videomode *lcdc_info;
+	struct fb_info *da8xx_fb_info;
+	struct da8xx_fb_par *par;
+	struct clk *tmp_lcdc_clk;
+	int ret;
+	unsigned long ulcm;
+
+	if (fb_pdata == NULL) {
+		dev_err(&device->dev, "Can not get platform data\n");
+		return -ENOENT;
+	}
+
+	lcdc_info = da8xx_fb_get_videomode(device);
+	if (lcdc_info == NULL)
+		return -ENODEV;
+
+	da8xx_fb_reg_base = devm_platform_ioremap_resource(device, 0);
+	if (IS_ERR(da8xx_fb_reg_base))
+		return PTR_ERR(da8xx_fb_reg_base);
+
+	tmp_lcdc_clk = devm_clk_get(&device->dev, "fck");
+	if (IS_ERR(tmp_lcdc_clk))
+		return dev_err_probe(&device->dev, PTR_ERR(tmp_lcdc_clk),
+				     "Can not get device clock\n");
+
+	pm_runtime_enable(&device->dev);
+	pm_runtime_get_sync(&device->dev);
+
+	/* Determine LCD IP Version */
+	switch (lcdc_read(LCD_PID_REG)) {
+	case 0x4C100102:
+		lcd_revision = LCD_VERSION_1;
+		break;
+	case 0x4F200800:
+	case 0x4F201000:
+		lcd_revision = LCD_VERSION_2;
+		break;
+	default:
+		dev_warn(&device->dev, "Unknown PID Reg value 0x%x, "
+				"defaulting to LCD revision 1\n",
+				lcdc_read(LCD_PID_REG));
+		lcd_revision = LCD_VERSION_1;
+		break;
+	}
+
+	lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data;
+
+	if (!lcd_cfg) {
+		ret = -EINVAL;
+		goto err_pm_runtime_disable;
+	}
+
+	da8xx_fb_info = framebuffer_alloc(sizeof(struct da8xx_fb_par),
+					&device->dev);
+	if (!da8xx_fb_info) {
+		ret = -ENOMEM;
+		goto err_pm_runtime_disable;
+	}
+
+	par = da8xx_fb_info->par;
+	par->dev = &device->dev;
+	par->lcdc_clk = tmp_lcdc_clk;
+	par->lcdc_clk_rate = clk_get_rate(par->lcdc_clk);
+
+	par->lcd_supply = devm_regulator_get_optional(&device->dev, "lcd");
+	if (IS_ERR(par->lcd_supply)) {
+		if (PTR_ERR(par->lcd_supply) == -EPROBE_DEFER) {
+			ret = -EPROBE_DEFER;
+			goto err_release_fb;
+		}
+
+		par->lcd_supply = NULL;
+	} else {
+		ret = regulator_enable(par->lcd_supply);
+		if (ret)
+			goto err_release_fb;
+	}
+
+	fb_videomode_to_var(&da8xx_fb_var, lcdc_info);
+	par->cfg = *lcd_cfg;
+
+	da8xx_fb_lcd_reset();
+
+	/* allocate frame buffer */
+	par->vram_size = lcdc_info->xres * lcdc_info->yres * lcd_cfg->bpp;
+	ulcm = lcm((lcdc_info->xres * lcd_cfg->bpp)/8, PAGE_SIZE);
+	par->vram_size = roundup(par->vram_size/8, ulcm);
+	par->vram_size = par->vram_size * LCD_NUM_BUFFERS;
+
+	par->vram_virt = dmam_alloc_coherent(par->dev,
+					     par->vram_size,
+					     &par->vram_phys,
+					     GFP_KERNEL | GFP_DMA);
+	if (!par->vram_virt) {
+		dev_err(&device->dev,
+			"GLCD: kmalloc for frame buffer failed\n");
+		ret = -EINVAL;
+		goto err_release_fb;
+	}
+
+	da8xx_fb_info->screen_base = (char __iomem *) par->vram_virt;
+	da8xx_fb_fix.smem_start    = par->vram_phys;
+	da8xx_fb_fix.smem_len      = par->vram_size;
+	da8xx_fb_fix.line_length   = (lcdc_info->xres * lcd_cfg->bpp) / 8;
+
+	par->dma_start = par->vram_phys;
+	par->dma_end   = par->dma_start + lcdc_info->yres *
+		da8xx_fb_fix.line_length - 1;
+
+	/* allocate palette buffer */
+	par->v_palette_base = dmam_alloc_coherent(par->dev, PALETTE_SIZE,
+						  &par->p_palette_base,
+						  GFP_KERNEL | GFP_DMA);
+	if (!par->v_palette_base) {
+		dev_err(&device->dev,
+			"GLCD: kmalloc for palette buffer failed\n");
+		ret = -EINVAL;
+		goto err_release_fb;
+	}
+
+	par->irq = platform_get_irq(device, 0);
+	if (par->irq < 0) {
+		ret = -ENOENT;
+		goto err_release_fb;
+	}
+
+	da8xx_fb_var.grayscale =
+	    lcd_cfg->panel_shade == MONOCHROME ? 1 : 0;
+	da8xx_fb_var.bits_per_pixel = lcd_cfg->bpp;
+
+	/* Initialize fbinfo */
+	da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
+	da8xx_fb_info->fix = da8xx_fb_fix;
+	da8xx_fb_info->var = da8xx_fb_var;
+	da8xx_fb_info->fbops = &da8xx_fb_ops;
+	da8xx_fb_info->pseudo_palette = par->pseudo_palette;
+	da8xx_fb_info->fix.visual = (da8xx_fb_info->var.bits_per_pixel <= 8) ?
+				FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
+
+	ret = fb_alloc_cmap(&da8xx_fb_info->cmap, PALETTE_SIZE, 0);
+	if (ret)
+		goto err_release_fb;
+	da8xx_fb_info->cmap.len = par->palette_sz;
+
+	/* initialize var_screeninfo */
+	da8xx_fb_var.activate = FB_ACTIVATE_FORCE;
+	fb_set_var(da8xx_fb_info, &da8xx_fb_var);
+
+	platform_set_drvdata(device, da8xx_fb_info);
+
+	/* initialize the vsync wait queue */
+	init_waitqueue_head(&par->vsync_wait);
+	par->vsync_timeout = HZ / 5;
+	par->which_dma_channel_done = -1;
+	spin_lock_init(&par->lock_for_chan_update);
+
+	/* Register the Frame Buffer  */
+	if (register_framebuffer(da8xx_fb_info) < 0) {
+		dev_err(&device->dev,
+			"GLCD: Frame Buffer Registration Failed!\n");
+		ret = -EINVAL;
+		goto err_dealloc_cmap;
+	}
+
+#ifdef CONFIG_CPU_FREQ
+	ret = lcd_da8xx_cpufreq_register(par);
+	if (ret) {
+		dev_err(&device->dev, "failed to register cpufreq\n");
+		goto err_cpu_freq;
+	}
+#endif
+
+	if (lcd_revision == LCD_VERSION_1)
+		lcdc_irq_handler = lcdc_irq_handler_rev01;
+	else {
+		init_waitqueue_head(&frame_done_wq);
+		lcdc_irq_handler = lcdc_irq_handler_rev02;
+	}
+
+	ret = devm_request_irq(&device->dev, par->irq, lcdc_irq_handler, 0,
+			       DRIVER_NAME, par);
+	if (ret)
+		goto irq_freq;
+	return 0;
+
+irq_freq:
+#ifdef CONFIG_CPU_FREQ
+	lcd_da8xx_cpufreq_deregister(par);
+err_cpu_freq:
+#endif
+	unregister_framebuffer(da8xx_fb_info);
+
+err_dealloc_cmap:
+	fb_dealloc_cmap(&da8xx_fb_info->cmap);
+
+err_release_fb:
+	framebuffer_release(da8xx_fb_info);
+
+err_pm_runtime_disable:
+	pm_runtime_put_sync(&device->dev);
+	pm_runtime_disable(&device->dev);
+
+	return ret;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static struct lcdc_context {
+	u32 clk_enable;
+	u32 ctrl;
+	u32 dma_ctrl;
+	u32 raster_timing_0;
+	u32 raster_timing_1;
+	u32 raster_timing_2;
+	u32 int_enable_set;
+	u32 dma_frm_buf_base_addr_0;
+	u32 dma_frm_buf_ceiling_addr_0;
+	u32 dma_frm_buf_base_addr_1;
+	u32 dma_frm_buf_ceiling_addr_1;
+	u32 raster_ctrl;
+} reg_context;
+
+static void lcd_context_save(void)
+{
+	if (lcd_revision == LCD_VERSION_2) {
+		reg_context.clk_enable = lcdc_read(LCD_CLK_ENABLE_REG);
+		reg_context.int_enable_set = lcdc_read(LCD_INT_ENABLE_SET_REG);
+	}
+
+	reg_context.ctrl = lcdc_read(LCD_CTRL_REG);
+	reg_context.dma_ctrl = lcdc_read(LCD_DMA_CTRL_REG);
+	reg_context.raster_timing_0 = lcdc_read(LCD_RASTER_TIMING_0_REG);
+	reg_context.raster_timing_1 = lcdc_read(LCD_RASTER_TIMING_1_REG);
+	reg_context.raster_timing_2 = lcdc_read(LCD_RASTER_TIMING_2_REG);
+	reg_context.dma_frm_buf_base_addr_0 =
+		lcdc_read(LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
+	reg_context.dma_frm_buf_ceiling_addr_0 =
+		lcdc_read(LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
+	reg_context.dma_frm_buf_base_addr_1 =
+		lcdc_read(LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
+	reg_context.dma_frm_buf_ceiling_addr_1 =
+		lcdc_read(LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
+	reg_context.raster_ctrl = lcdc_read(LCD_RASTER_CTRL_REG);
+	return;
+}
+
+static void lcd_context_restore(void)
+{
+	if (lcd_revision == LCD_VERSION_2) {
+		lcdc_write(reg_context.clk_enable, LCD_CLK_ENABLE_REG);
+		lcdc_write(reg_context.int_enable_set, LCD_INT_ENABLE_SET_REG);
+	}
+
+	lcdc_write(reg_context.ctrl, LCD_CTRL_REG);
+	lcdc_write(reg_context.dma_ctrl, LCD_DMA_CTRL_REG);
+	lcdc_write(reg_context.raster_timing_0, LCD_RASTER_TIMING_0_REG);
+	lcdc_write(reg_context.raster_timing_1, LCD_RASTER_TIMING_1_REG);
+	lcdc_write(reg_context.raster_timing_2, LCD_RASTER_TIMING_2_REG);
+	lcdc_write(reg_context.dma_frm_buf_base_addr_0,
+			LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
+	lcdc_write(reg_context.dma_frm_buf_ceiling_addr_0,
+			LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
+	lcdc_write(reg_context.dma_frm_buf_base_addr_1,
+			LCD_DMA_FRM_BUF_BASE_ADDR_1_REG);
+	lcdc_write(reg_context.dma_frm_buf_ceiling_addr_1,
+			LCD_DMA_FRM_BUF_CEILING_ADDR_1_REG);
+	lcdc_write(reg_context.raster_ctrl, LCD_RASTER_CTRL_REG);
+	return;
+}
+
+static int fb_suspend(struct device *dev)
+{
+	struct fb_info *info = dev_get_drvdata(dev);
+	struct da8xx_fb_par *par = info->par;
+	int ret;
+
+	console_lock();
+	if (par->lcd_supply) {
+		ret = regulator_disable(par->lcd_supply);
+		if (ret)
+			return ret;
+	}
+
+	fb_set_suspend(info, 1);
+	lcd_disable_raster(DA8XX_FRAME_WAIT);
+	lcd_context_save();
+	pm_runtime_put_sync(dev);
+	console_unlock();
+
+	return 0;
+}
+static int fb_resume(struct device *dev)
+{
+	struct fb_info *info = dev_get_drvdata(dev);
+	struct da8xx_fb_par *par = info->par;
+	int ret;
+
+	console_lock();
+	pm_runtime_get_sync(dev);
+	lcd_context_restore();
+	if (par->blank == FB_BLANK_UNBLANK) {
+		lcd_enable_raster();
+
+		if (par->lcd_supply) {
+			ret = regulator_enable(par->lcd_supply);
+			if (ret)
+				return ret;
+		}
+	}
+
+	fb_set_suspend(info, 0);
+	console_unlock();
+
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(fb_pm_ops, fb_suspend, fb_resume);
+
+static struct platform_driver da8xx_fb_driver = {
+	.probe = fb_probe,
+	.remove = fb_remove,
+	.driver = {
+		   .name = DRIVER_NAME,
+		   .pm	= &fb_pm_ops,
+		   },
+};
+module_platform_driver(da8xx_fb_driver);
+
+MODULE_DESCRIPTION("Framebuffer driver for TI da8xx/omap-l1xx");
+MODULE_AUTHOR("Texas Instruments");
+MODULE_LICENSE("GPL");