// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2007
 * DENX Software Engineering, Anatolij Gustschin, agust@denx.de
 */

/*
 * mb862xx.c - Graphic interface for Fujitsu CoralP/Lime
 * PCI and video mode code was derived from smiLynxEM driver.
 */

#include <common.h>
#include <linux/delay.h>

#include <asm/io.h>
#include <env.h>
#include <pci.h>
#include <video_fb.h>
#include "videomodes.h"
#include <mb862xx.h>

#if defined(CONFIG_POST)
#include <post.h>
#endif

/*
 * Graphic Device
 */
GraphicDevice mb862xx;

/*
 * 32MB external RAM - 256K Chip MMIO = 0x1FC0000 ;
 */
#define VIDEO_MEM_SIZE	0x01FC0000

#if defined(CONFIG_PCI)
#if defined(CONFIG_VIDEO_CORALP)

static struct pci_device_id supported[] = {
	{ PCI_VENDOR_ID_FUJITSU, PCI_DEVICE_ID_CORAL_P },
	{ PCI_VENDOR_ID_FUJITSU, PCI_DEVICE_ID_CORAL_PA },
	{ }
};

/* Internal clock frequency divider table, index is mode number */
unsigned int fr_div[] = { 0x00000f00, 0x00000900, 0x00000500 };
#endif
#endif

#if defined(CONFIG_VIDEO_CORALP)
#define	rd_io		in32r
#define	wr_io		out32r
#else
#define	rd_io(addr)	in_be32((volatile unsigned *)(addr))
#define	wr_io(addr, val)	out_be32((volatile unsigned *)(addr), (val))
#endif

#define HOST_RD_REG(off)	rd_io((dev->frameAdrs + GC_HOST_BASE + (off)))
#define HOST_WR_REG(off, val)	wr_io((dev->frameAdrs + GC_HOST_BASE + (off)), \
				      (val))
#define DISP_RD_REG(off)	rd_io((dev->frameAdrs + GC_DISP_BASE + (off)))
#define DISP_WR_REG(off, val)	wr_io((dev->frameAdrs + GC_DISP_BASE + (off)), \
				      (val))
#define DE_RD_REG(off)		rd_io((dev->dprBase + (off)))
#define DE_WR_REG(off, val)	wr_io((dev->dprBase + (off)), (val))

#if defined(CONFIG_VIDEO_CORALP)
#define DE_WR_FIFO(val)		wr_io((dev->dprBase + (GC_GEO_FIFO)), (val))
#else
#define DE_WR_FIFO(val)		wr_io((dev->dprBase + (GC_FIFO)), (val))
#endif

#define L0PAL_WR_REG(idx, val)	wr_io((dev->frameAdrs + \
				       (GC_DISP_BASE | GC_L0PAL0) + \
				       ((idx) << 2)), (val))

#if defined(CONFIG_VIDEO_MB862xx_ACCEL)
static void gdc_sw_reset (void)
{
	GraphicDevice *dev = &mb862xx;

	HOST_WR_REG (GC_SRST, 0x1);
	udelay(500);
	video_hw_init ();
}


static void de_wait (void)
{
	GraphicDevice *dev = &mb862xx;
	int lc = 0x10000;

	/*
	 * Sync with software writes to framebuffer,
	 * try to reset if engine locked
	 */
	while (DE_RD_REG (GC_CTR) & 0x00000131)
		if (lc-- < 0) {
			gdc_sw_reset ();
			puts ("gdc reset done after drawing engine lock.\n");
			break;
		}
}

static void de_wait_slots (int slots)
{
	GraphicDevice *dev = &mb862xx;
	int lc = 0x10000;

	/* Wait for free fifo slots */
	while (DE_RD_REG (GC_IFCNT) < slots)
		if (lc-- < 0) {
			gdc_sw_reset ();
			puts ("gdc reset done after drawing engine lock.\n");
			break;
		}
}
#endif

#if !defined(CONFIG_VIDEO_CORALP)
static void board_disp_init (void)
{
	GraphicDevice *dev = &mb862xx;
	const gdc_regs *regs = board_get_regs ();

	while (regs->index) {
		DISP_WR_REG (regs->index, regs->value);
		regs++;
	}
}
#endif

/*
 * Init drawing engine if accel enabled.
 * Also clears visible framebuffer.
 */
static void de_init (void)
{
	GraphicDevice *dev = &mb862xx;
#if defined(CONFIG_VIDEO_MB862xx_ACCEL)
	int cf = (dev->gdfBytesPP == 1) ? 0x0000 : 0x8000;

	dev->dprBase = dev->frameAdrs + GC_DRAW_BASE;

	/* Setup mode and fbbase, xres, fg, bg */
	de_wait_slots (2);
	DE_WR_FIFO (0xf1010108);
	DE_WR_FIFO (cf | 0x0300);
	DE_WR_REG (GC_FBR, 0x0);
	DE_WR_REG (GC_XRES, dev->winSizeX);
	DE_WR_REG (GC_FC, 0x0);
	DE_WR_REG (GC_BC, 0x0);
	/* Reset clipping */
	DE_WR_REG (GC_CXMIN, 0x0);
	DE_WR_REG (GC_CXMAX, dev->winSizeX);
	DE_WR_REG (GC_CYMIN, 0x0);
	DE_WR_REG (GC_CYMAX, dev->winSizeY);

	/* Clear framebuffer using drawing engine */
	de_wait_slots (3);
	DE_WR_FIFO (0x09410000);
	DE_WR_FIFO (0x00000000);
	DE_WR_FIFO (dev->winSizeY << 16 | dev->winSizeX);
	/* sync with SW access to framebuffer */
	de_wait ();
#else
	unsigned int i, *p;

	i = dev->winSizeX * dev->winSizeY;
	p = (unsigned int *)dev->frameAdrs;
	while (i--)
		*p++ = 0;
#endif
}

#if defined(CONFIG_VIDEO_CORALP)
/* use CCF and MMR parameters for Coral-P Eval. Board as default */
#ifndef CONFIG_SYS_MB862xx_CCF
#define CONFIG_SYS_MB862xx_CCF	0x00090000
#endif
#ifndef CONFIG_SYS_MB862xx_MMR
#define CONFIG_SYS_MB862xx_MMR	0x11d7fa13
#endif

unsigned int pci_video_init (void)
{
	GraphicDevice *dev = &mb862xx;
	pci_dev_t devbusfn;
	u16 device;

	if ((devbusfn = pci_find_devices (supported, 0)) < 0) {
		puts("controller not present\n");
		return 0;
	}

	/* PCI setup */
	pci_write_config_dword (devbusfn, PCI_COMMAND,
				(PCI_COMMAND_MEMORY | PCI_COMMAND_IO));
	pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_0, &dev->frameAdrs);
	dev->frameAdrs = pci_mem_to_phys (devbusfn, dev->frameAdrs);

	if (dev->frameAdrs == 0) {
		puts ("PCI config: failed to get base address\n");
		return 0;
	}

	dev->pciBase = dev->frameAdrs;

	puts("Coral-");

	pci_read_config_word(devbusfn, PCI_DEVICE_ID, &device);
	switch (device) {
	case PCI_DEVICE_ID_CORAL_P:
		puts("P\n");
		break;
	case PCI_DEVICE_ID_CORAL_PA:
		puts("PA\n");
		break;
	default:
		puts("Unknown\n");
		return 0;
	}

	/* Setup clocks and memory mode for Coral-P(A) */
	HOST_WR_REG(GC_CCF, CONFIG_SYS_MB862xx_CCF);
	udelay(200);
	HOST_WR_REG(GC_MMR, CONFIG_SYS_MB862xx_MMR);
	udelay(100);
	return dev->frameAdrs;
}

unsigned int card_init (void)
{
	GraphicDevice *dev = &mb862xx;
	unsigned int cf, videomode, div = 0;
	unsigned long t1, hsync, vsync;
	char *penv;
	int tmp, i, bpp;
	struct ctfb_res_modes *res_mode;
	struct ctfb_res_modes var_mode;

	memset (dev, 0, sizeof (GraphicDevice));

	if (!pci_video_init ())
		return 0;

	tmp = 0;
	videomode = 0x310;
	/* get video mode via environment */
	penv = env_get("videomode");
	if (penv) {
		/* decide if it is a string */
		if (penv[0] <= '9') {
			videomode = (int) simple_strtoul (penv, NULL, 16);
			tmp = 1;
		}
	} else {
		tmp = 1;
	}

	if (tmp) {
		/* parameter are vesa modes, search params */
		for (i = 0; i < VESA_MODES_COUNT; i++) {
			if (vesa_modes[i].vesanr == videomode)
				break;
		}
		if (i == VESA_MODES_COUNT) {
			printf ("\tno VESA Mode found, fallback to mode 0x%x\n",
				videomode);
			i = 0;
		}
		res_mode = (struct ctfb_res_modes *)
			   &res_mode_init[vesa_modes[i].resindex];
		if (vesa_modes[i].resindex > 2) {
			puts ("\tUnsupported resolution, using default\n");
			bpp = vesa_modes[1].bits_per_pixel;
			div = fr_div[1];
		}
		bpp = vesa_modes[i].bits_per_pixel;
		div = fr_div[vesa_modes[i].resindex];
	} else {
		res_mode = (struct ctfb_res_modes *) &var_mode;
		bpp = video_get_params (res_mode, penv);
	}

	/* calculate hsync and vsync freq (info only) */
	t1 = (res_mode->left_margin + res_mode->xres +
	      res_mode->right_margin + res_mode->hsync_len) / 8;
	t1 *= 8;
	t1 *= res_mode->pixclock;
	t1 /= 1000;
	hsync = 1000000000L / t1;
	t1 *= (res_mode->upper_margin + res_mode->yres +
	       res_mode->lower_margin + res_mode->vsync_len);
	t1 /= 1000;
	vsync = 1000000000L / t1;

	/* fill in Graphic device struct */
	sprintf (dev->modeIdent, "%dx%dx%d %ldkHz %ldHz", res_mode->xres,
		 res_mode->yres, bpp, (hsync / 1000), (vsync / 1000));
	printf ("\t%s\n", dev->modeIdent);
	dev->winSizeX = res_mode->xres;
	dev->winSizeY = res_mode->yres;
	dev->memSize = VIDEO_MEM_SIZE;

	switch (bpp) {
	case 8:
		dev->gdfIndex = GDF__8BIT_INDEX;
		dev->gdfBytesPP = 1;
		break;
	case 15:
	case 16:
		dev->gdfIndex = GDF_15BIT_555RGB;
		dev->gdfBytesPP = 2;
		break;
	default:
		printf ("\t%d bpp configured, but only 8,15 and 16 supported\n",
			bpp);
		puts ("\tfallback to 15bpp\n");
		dev->gdfIndex = GDF_15BIT_555RGB;
		dev->gdfBytesPP = 2;
	}

	/* Setup dot clock (internal pll, division rate) */
	DISP_WR_REG (GC_DCM1, div);
	/* L0 init */
	cf = (dev->gdfBytesPP == 1) ? 0x00000000 : 0x80000000;
	DISP_WR_REG (GC_L0M, ((dev->winSizeX * dev->gdfBytesPP) / 64) << 16 |
			     (dev->winSizeY - 1) | cf);
	DISP_WR_REG (GC_L0OA0, 0x0);
	DISP_WR_REG (GC_L0DA0, 0x0);
	DISP_WR_REG (GC_L0DY_L0DX, 0x0);
	DISP_WR_REG (GC_L0EM, 0x0);
	DISP_WR_REG (GC_L0WY_L0WX, 0x0);
	DISP_WR_REG (GC_L0WH_L0WW, (dev->winSizeY - 1) << 16 | dev->winSizeX);

	/* Display timing init */
	DISP_WR_REG (GC_HTP_A, (dev->winSizeX +
				res_mode->left_margin +
				res_mode->right_margin +
				res_mode->hsync_len - 1) << 16);
	DISP_WR_REG (GC_HDB_HDP_A, (dev->winSizeX - 1) << 16 |
				   (dev->winSizeX - 1));
	DISP_WR_REG (GC_VSW_HSW_HSP_A,  (res_mode->vsync_len - 1) << 24 |
					(res_mode->hsync_len - 1) << 16 |
					(dev->winSizeX +
					 res_mode->right_margin - 1));
	DISP_WR_REG (GC_VTR_A, (dev->winSizeY + res_mode->lower_margin +
				res_mode->upper_margin +
				res_mode->vsync_len - 1) << 16);
	DISP_WR_REG (GC_VDP_VSP_A, (dev->winSizeY-1) << 16 |
				   (dev->winSizeY +
				    res_mode->lower_margin - 1));
	DISP_WR_REG (GC_WY_WX, 0x0);
	DISP_WR_REG (GC_WH_WW, dev->winSizeY << 16 | dev->winSizeX);
	/* Display enable, L0 layer */
	DISP_WR_REG (GC_DCM1, 0x80010000 | div);

	return dev->frameAdrs;
}
#endif


#if !defined(CONFIG_VIDEO_CORALP)
int mb862xx_probe(unsigned int addr)
{
	GraphicDevice *dev = &mb862xx;
	unsigned int reg;

	dev->frameAdrs = addr;
	dev->dprBase = dev->frameAdrs + GC_DRAW_BASE;

	/* Try to access GDC ID/Revision registers */
	reg = HOST_RD_REG (GC_CID);
	reg = HOST_RD_REG (GC_CID);
	if (reg == 0x303) {
		reg = DE_RD_REG(GC_REV);
		reg = DE_RD_REG(GC_REV);
		if ((reg & ~0xff) == 0x20050100)
			return MB862XX_TYPE_LIME;
	}

	return 0;
}
#endif

void *video_hw_init (void)
{
	GraphicDevice *dev = &mb862xx;

	puts ("Video: Fujitsu ");

	memset (dev, 0, sizeof (GraphicDevice));

#if defined(CONFIG_VIDEO_CORALP)
	if (card_init () == 0)
		return NULL;
#else
	/*
	 * Preliminary init of the onboard graphic controller,
	 * retrieve base address
	 */
	if ((dev->frameAdrs = board_video_init ()) == 0) {
		puts ("Controller not found!\n");
		return NULL;
	} else {
		puts ("Lime\n");

		/* Set Change of Clock Frequency Register */
		HOST_WR_REG (GC_CCF, CONFIG_SYS_MB862xx_CCF);
		/* Delay required */
		udelay(300);
		/* Set Memory I/F Mode Register) */
		HOST_WR_REG (GC_MMR, CONFIG_SYS_MB862xx_MMR);
	}
#endif

	de_init ();

#if !defined(CONFIG_VIDEO_CORALP)
	board_disp_init ();
#endif

#if (defined(CONFIG_LWMON5) || \
     defined(CONFIG_SOCRATES)) && !(CONFIG_POST & CONFIG_SYS_POST_SYSMON)
	/* Lamp on */
	board_backlight_switch (1);
#endif

	return dev;
}

/*
 * Set a RGB color in the LUT
 */
void video_set_lut (unsigned int index, unsigned char r,
		    unsigned char g, unsigned char b)
{
	GraphicDevice *dev = &mb862xx;

	L0PAL_WR_REG (index, (r << 16) | (g << 8) | (b));
}

#if defined(CONFIG_VIDEO_MB862xx_ACCEL)
/*
 * Drawing engine Fill and BitBlt screen region
 */
void video_hw_rectfill (unsigned int bpp, unsigned int dst_x,
			unsigned int dst_y, unsigned int dim_x,
			unsigned int dim_y, unsigned int color)
{
	GraphicDevice *dev = &mb862xx;

	de_wait_slots (3);
	DE_WR_REG (GC_FC, color);
	DE_WR_FIFO (0x09410000);
	DE_WR_FIFO ((dst_y << 16) | dst_x);
	DE_WR_FIFO ((dim_y << 16) | dim_x);
	de_wait ();
}

void video_hw_bitblt (unsigned int bpp, unsigned int src_x,
		      unsigned int src_y, unsigned int dst_x,
		      unsigned int dst_y, unsigned int width,
		      unsigned int height)
{
	GraphicDevice *dev = &mb862xx;
	unsigned int ctrl = 0x0d000000L;

	if (src_x >= dst_x && src_y >= dst_y)
		ctrl |= 0x00440000L;
	else if (src_x >= dst_x && src_y <= dst_y)
		ctrl |= 0x00460000L;
	else if (src_x <= dst_x && src_y >= dst_y)
		ctrl |= 0x00450000L;
	else
		ctrl |= 0x00470000L;

	de_wait_slots (4);
	DE_WR_FIFO (ctrl);
	DE_WR_FIFO ((src_y << 16) | src_x);
	DE_WR_FIFO ((dst_y << 16) | dst_x);
	DE_WR_FIFO ((height << 16) | width);
	de_wait (); /* sync */
}
#endif