include/linux/arm-hdlcd.h

/*
 * include/linux/arm-hdlcd.h
 *
 * Copyright (C) 2011 ARM Limited
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 *
 *  ARM HDLCD Controller register definition
 */

#include <linux/fb.h>
#include <linux/completion.h>

/* register offsets */
#define HDLCD_REG_VERSION		0x0000	/* ro */
#define HDLCD_REG_INT_RAWSTAT		0x0010	/* rw */
#define HDLCD_REG_INT_CLEAR		0x0014	/* wo */
#define HDLCD_REG_INT_MASK		0x0018	/* rw */
#define HDLCD_REG_INT_STATUS		0x001c	/* ro */
#define HDLCD_REG_USER_OUT		0x0020	/* rw */
#define HDLCD_REG_FB_BASE		0x0100	/* rw */
#define HDLCD_REG_FB_LINE_LENGTH	0x0104	/* rw */
#define HDLCD_REG_FB_LINE_COUNT		0x0108	/* rw */
#define HDLCD_REG_FB_LINE_PITCH		0x010c	/* rw */
#define HDLCD_REG_BUS_OPTIONS		0x0110	/* rw */
#define HDLCD_REG_V_SYNC		0x0200	/* rw */
#define HDLCD_REG_V_BACK_PORCH		0x0204	/* rw */
#define HDLCD_REG_V_DATA		0x0208	/* rw */
#define HDLCD_REG_V_FRONT_PORCH		0x020c	/* rw */
#define HDLCD_REG_H_SYNC		0x0210	/* rw */
#define HDLCD_REG_H_BACK_PORCH		0x0214	/* rw */
#define HDLCD_REG_H_DATA		0x0218	/* rw */
#define HDLCD_REG_H_FRONT_PORCH		0x021c	/* rw */
#define HDLCD_REG_POLARITIES		0x0220	/* rw */
#define HDLCD_REG_COMMAND		0x0230	/* rw */
#define HDLCD_REG_PIXEL_FORMAT		0x0240	/* rw */
#define HDLCD_REG_BLUE_SELECT		0x0244	/* rw */
#define HDLCD_REG_GREEN_SELECT		0x0248	/* rw */
#define HDLCD_REG_RED_SELECT		0x024c	/* rw */

/* version */
#define HDLCD_PRODUCT_ID		0x1CDC0000
#define HDLCD_PRODUCT_MASK		0xFFFF0000
#define HDLCD_VERSION_MAJOR_MASK	0x0000FF00
#define HDLCD_VERSION_MINOR_MASK	0x000000FF

/* interrupts */
#define HDLCD_INTERRUPT_DMA_END		(1 << 0)
#define HDLCD_INTERRUPT_BUS_ERROR	(1 << 1)
#define HDLCD_INTERRUPT_VSYNC		(1 << 2)
#define HDLCD_INTERRUPT_UNDERRUN	(1 << 3)

/* polarity */
#define HDLCD_POLARITY_VSYNC		(1 << 0)
#define HDLCD_POLARITY_HSYNC		(1 << 1)
#define HDLCD_POLARITY_DATAEN		(1 << 2)
#define HDLCD_POLARITY_DATA		(1 << 3)
#define HDLCD_POLARITY_PIXELCLK		(1 << 4)

/* commands */
#define HDLCD_COMMAND_DISABLE		(0 << 0)
#define HDLCD_COMMAND_ENABLE		(1 << 0)

/* pixel format */
#define HDLCD_PIXEL_FMT_LITTLE_ENDIAN	(0 << 31)
#define HDLCD_PIXEL_FMT_BIG_ENDIAN	(1 << 31)
#define HDLCD_BYTES_PER_PIXEL_MASK	(3 << 3)

/* bus options */
#define HDLCD_BUS_BURST_MASK		0x01f
#define HDLCD_BUS_MAX_OUTSTAND		0xf00
#define HDLCD_BUS_BURST_NONE		(0 << 0)
#define HDLCD_BUS_BURST_1		(1 << 0)
#define HDLCD_BUS_BURST_2		(1 << 1)
#define HDLCD_BUS_BURST_4		(1 << 2)
#define HDLCD_BUS_BURST_8		(1 << 3)
#define HDLCD_BUS_BURST_16		(1 << 4)

/* Max resolution supported is 4096x4096, 8 bit per color component,
   8 bit alpha, but we are going to choose the usual hardware default
   (2048x2048, 32 bpp) and enable double buffering */
//#define HDLCD_MAX_XRES			2048
//#define HDLCD_MAX_YRES			2048

/* For gem5, we want to support up to 8K, so these values adjusted accordingly.
   Since our HW is just a model, it can support whatever we like. */
#define HDLCD_MAX_XRES			8192
#define HDLCD_MAX_YRES			8192

#define HDLCD_MAX_FRAMEBUFFER_SIZE	(HDLCD_MAX_XRES * HDLCD_MAX_YRES << 2)

#define HDLCD_MEM_BASE			(CONFIG_PAGE_OFFSET - 0x1000000)

#define NR_PALETTE	256

/* OEMs using HDLCD may wish to enable these settings if
 * display disruption is apparent and you suspect HDLCD
 * access to RAM may be starved.
 */
/* Turn HDLCD default color red instead of black so
 * that it's easy to see pixel clock data underruns
 * (compared to other visual disruption)
 */
//#define HDLCD_RED_DEFAULT_COLOUR
/* Add a counter in the IRQ handler to count buffer underruns
 * and /proc/hdlcd_underrun to read the counter
 */
//#define HDLCD_COUNT_BUFFERUNDERRUNS
/* Restrict height to 1x screen size
 *
 */
//#define HDLCD_NO_VIRTUAL_SCREEN

#ifdef CONFIG_ANDROID
#define HDLCD_NO_VIRTUAL_SCREEN
#endif

struct hdlcd_device {
	struct fb_info		fb;
	struct device		*dev;
	struct clk		*clk;
	void __iomem		*base;
	int			irq;
	struct completion	vsync_completion;
	unsigned char		*edid;
};