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/*
 * Copyright (C) 2006-2010, 2012-2013 Freescale Semiconductor, Inc.
 * All rights reserved.
 *
 * Author: Andy Fleming <afleming@freescale.com>
 *
 * Based on 83xx/mpc8360e_pb.c by:
 *	   Li Yang <LeoLi@freescale.com>
 *	   Yin Olivia <Hong-hua.Yin@freescale.com>
 *
 * Description:
 * MPC85xx MDS board specific routines.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/initrd.h>
#include <linux/fsl_devices.h>
#include <linux/of_platform.h>
#include <linux/of_device.h>
#include <linux/phy.h>
#include <linux/memblock.h>
#include <linux/fsl/guts.h>

#include <linux/atomic.h>
#include <asm/time.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <asm/irq.h>
#include <mm/mmu_decl.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#include <sysdev/simple_gpio.h>
#include <soc/fsl/qe/qe.h>
#include <soc/fsl/qe/qe_ic.h>
#include <asm/mpic.h>
#include <asm/swiotlb.h>
#include "smp.h"

#include "mpc85xx.h"

#undef DEBUG
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif

#if IS_BUILTIN(CONFIG_PHYLIB)

#define MV88E1111_SCR	0x10
#define MV88E1111_SCR_125CLK	0x0010
static int mpc8568_fixup_125_clock(struct phy_device *phydev)
{
	int scr;
	int err;

	/* Workaround for the 125 CLK Toggle */
	scr = phy_read(phydev, MV88E1111_SCR);

	if (scr < 0)
		return scr;

	err = phy_write(phydev, MV88E1111_SCR, scr & ~(MV88E1111_SCR_125CLK));

	if (err)
		return err;

	err = phy_write(phydev, MII_BMCR, BMCR_RESET);

	if (err)
		return err;

	scr = phy_read(phydev, MV88E1111_SCR);

	if (scr < 0)
		return scr;

	err = phy_write(phydev, MV88E1111_SCR, scr | 0x0008);

	return err;
}

static int mpc8568_mds_phy_fixups(struct phy_device *phydev)
{
	int temp;
	int err;

	/* Errata */
	err = phy_write(phydev,29, 0x0006);

	if (err)
		return err;

	temp = phy_read(phydev, 30);

	if (temp < 0)
		return temp;

	temp = (temp & (~0x8000)) | 0x4000;
	err = phy_write(phydev,30, temp);

	if (err)
		return err;

	err = phy_write(phydev,29, 0x000a);

	if (err)
		return err;

	temp = phy_read(phydev, 30);

	if (temp < 0)
		return temp;

	temp = phy_read(phydev, 30);

	if (temp < 0)
		return temp;

	temp &= ~0x0020;

	err = phy_write(phydev,30,temp);

	if (err)
		return err;

	/* Disable automatic MDI/MDIX selection */
	temp = phy_read(phydev, 16);

	if (temp < 0)
		return temp;

	temp &= ~0x0060;
	err = phy_write(phydev,16,temp);

	return err;
}

#endif

/* ************************************************************************
 *
 * Setup the architecture
 *
 */
#ifdef CONFIG_QUICC_ENGINE
static void __init mpc85xx_mds_reset_ucc_phys(void)
{
	struct device_node *np;
	static u8 __iomem *bcsr_regs;

	/* Map BCSR area */
	np = of_find_node_by_name(NULL, "bcsr");
	if (!np)
		return;

	bcsr_regs = of_iomap(np, 0);
	of_node_put(np);
	if (!bcsr_regs)
		return;

	if (machine_is(mpc8568_mds)) {
#define BCSR_UCC1_GETH_EN	(0x1 << 7)
#define BCSR_UCC2_GETH_EN	(0x1 << 7)
#define BCSR_UCC1_MODE_MSK	(0x3 << 4)
#define BCSR_UCC2_MODE_MSK	(0x3 << 0)

		/* Turn off UCC1 & UCC2 */
		clrbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
		clrbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);

		/* Mode is RGMII, all bits clear */
		clrbits8(&bcsr_regs[11], BCSR_UCC1_MODE_MSK |
					 BCSR_UCC2_MODE_MSK);

		/* Turn UCC1 & UCC2 on */
		setbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
		setbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
	} else if (machine_is(mpc8569_mds)) {
#define BCSR7_UCC12_GETHnRST	(0x1 << 2)
#define BCSR8_UEM_MARVELL_RST	(0x1 << 1)
#define BCSR_UCC_RGMII		(0x1 << 6)
#define BCSR_UCC_RTBI		(0x1 << 5)
		/*
		 * U-Boot mangles interrupt polarity for Marvell PHYs,
		 * so reset built-in and UEM Marvell PHYs, this puts
		 * the PHYs into their normal state.
		 */
		clrbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
		setbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);

		setbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
		clrbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);

		for_each_compatible_node(np, "network", "ucc_geth") {
			const unsigned int *prop;
			int ucc_num;

			prop = of_get_property(np, "cell-index", NULL);
			if (prop == NULL)
				continue;

			ucc_num = *prop - 1;

			prop = of_get_property(np, "phy-connection-type", NULL);
			if (prop == NULL)
				continue;

			if (strcmp("rtbi", (const char *)prop) == 0)
				clrsetbits_8(&bcsr_regs[7 + ucc_num],
					BCSR_UCC_RGMII, BCSR_UCC_RTBI);
		}
	} else if (machine_is(p1021_mds)) {
#define BCSR11_ENET_MICRST     (0x1 << 5)
		/* Reset Micrel PHY */
		clrbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
		setbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
	}

	iounmap(bcsr_regs);
}

static void __init mpc85xx_mds_qe_init(void)
{
	struct device_node *np;

	mpc85xx_qe_init();
	mpc85xx_qe_par_io_init();
	mpc85xx_mds_reset_ucc_phys();

	if (machine_is(p1021_mds)) {

		struct ccsr_guts __iomem *guts;

		np = of_find_node_by_name(NULL, "global-utilities");
		if (np) {
			guts = of_iomap(np, 0);
			if (!guts)
				pr_err("mpc85xx-rdb: could not map global utilities register\n");
			else{
			/* P1021 has pins muxed for QE and other functions. To
			 * enable QE UEC mode, we need to set bit QE0 for UCC1
			 * in Eth mode, QE0 and QE3 for UCC5 in Eth mode, QE9
			 * and QE12 for QE MII management signals in PMUXCR
			 * register.
			 */
				setbits32(&guts->pmuxcr, MPC85xx_PMUXCR_QE(0) |
						  MPC85xx_PMUXCR_QE(3) |
						  MPC85xx_PMUXCR_QE(9) |
						  MPC85xx_PMUXCR_QE(12));
				iounmap(guts);
			}
			of_node_put(np);
		}

	}
}

static void __init mpc85xx_mds_qeic_init(void)
{
	struct device_node *np;

	np = of_find_compatible_node(NULL, NULL, "fsl,qe");
	if (!of_device_is_available(np)) {
		of_node_put(np);
		return;
	}

	np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
	if (!np) {
		np = of_find_node_by_type(NULL, "qeic");
		if (!np)
			return;
	}

	if (machine_is(p1021_mds))
		qe_ic_init(np, 0, qe_ic_cascade_low_mpic,
				qe_ic_cascade_high_mpic);
	else
		qe_ic_init(np, 0, qe_ic_cascade_muxed_mpic, NULL);
	of_node_put(np);
}
#else
static void __init mpc85xx_mds_qe_init(void) { }
static void __init mpc85xx_mds_qeic_init(void) { }
#endif	/* CONFIG_QUICC_ENGINE */

static void __init mpc85xx_mds_setup_arch(void)
{
	if (ppc_md.progress)
		ppc_md.progress("mpc85xx_mds_setup_arch()", 0);

	mpc85xx_smp_init();

	mpc85xx_mds_qe_init();

	fsl_pci_assign_primary();

	swiotlb_detect_4g();
}

#if IS_BUILTIN(CONFIG_PHYLIB)

static int __init board_fixups(void)
{
	char phy_id[20];
	char *compstrs[2] = {"fsl,gianfar-mdio", "fsl,ucc-mdio"};
	struct device_node *mdio;
	struct resource res;
	int i;

	for (i = 0; i < ARRAY_SIZE(compstrs); i++) {
		mdio = of_find_compatible_node(NULL, NULL, compstrs[i]);

		of_address_to_resource(mdio, 0, &res);
		snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
			(unsigned long long)res.start, 1);

		phy_register_fixup_for_id(phy_id, mpc8568_fixup_125_clock);
		phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);

		/* Register a workaround for errata */
		snprintf(phy_id, sizeof(phy_id), "%llx:%02x",
			(unsigned long long)res.start, 7);
		phy_register_fixup_for_id(phy_id, mpc8568_mds_phy_fixups);

		of_node_put(mdio);
	}

	return 0;
}

machine_arch_initcall(mpc8568_mds, board_fixups);
machine_arch_initcall(mpc8569_mds, board_fixups);

#endif

static int __init mpc85xx_publish_devices(void)
{
	if (machine_is(mpc8568_mds))
		simple_gpiochip_init("fsl,mpc8568mds-bcsr-gpio");
	if (machine_is(mpc8569_mds))
		simple_gpiochip_init("fsl,mpc8569mds-bcsr-gpio");

	return mpc85xx_common_publish_devices();
}

machine_arch_initcall(mpc8568_mds, mpc85xx_publish_devices);
machine_arch_initcall(mpc8569_mds, mpc85xx_publish_devices);
machine_arch_initcall(p1021_mds, mpc85xx_common_publish_devices);

machine_arch_initcall(mpc8568_mds, swiotlb_setup_bus_notifier);
machine_arch_initcall(mpc8569_mds, swiotlb_setup_bus_notifier);
machine_arch_initcall(p1021_mds, swiotlb_setup_bus_notifier);

static void __init mpc85xx_mds_pic_init(void)
{
	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
			MPIC_SINGLE_DEST_CPU,
			0, 256, " OpenPIC  ");
	BUG_ON(mpic == NULL);

	mpic_init(mpic);
	mpc85xx_mds_qeic_init();
}

static int __init mpc85xx_mds_probe(void)
{
	return of_machine_is_compatible("MPC85xxMDS");
}

define_machine(mpc8568_mds) {
	.name		= "MPC8568 MDS",
	.probe		= mpc85xx_mds_probe,
	.setup_arch	= mpc85xx_mds_setup_arch,
	.init_IRQ	= mpc85xx_mds_pic_init,
	.get_irq	= mpic_get_irq,
	.calibrate_decr	= generic_calibrate_decr,
	.progress	= udbg_progress,
#ifdef CONFIG_PCI
	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
#endif
};

static int __init mpc8569_mds_probe(void)
{
	return of_machine_is_compatible("fsl,MPC8569EMDS");
}

define_machine(mpc8569_mds) {
	.name		= "MPC8569 MDS",
	.probe		= mpc8569_mds_probe,
	.setup_arch	= mpc85xx_mds_setup_arch,
	.init_IRQ	= mpc85xx_mds_pic_init,
	.get_irq	= mpic_get_irq,
	.calibrate_decr	= generic_calibrate_decr,
	.progress	= udbg_progress,
#ifdef CONFIG_PCI
	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
#endif
};

static int __init p1021_mds_probe(void)
{
	return of_machine_is_compatible("fsl,P1021MDS");

}

define_machine(p1021_mds) {
	.name		= "P1021 MDS",
	.probe		= p1021_mds_probe,
	.setup_arch	= mpc85xx_mds_setup_arch,
	.init_IRQ	= mpc85xx_mds_pic_init,
	.get_irq	= mpic_get_irq,
	.calibrate_decr	= generic_calibrate_decr,
	.progress	= udbg_progress,
#ifdef CONFIG_PCI
	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
#endif
};