/*
 * arch/arm/mach-orion5x/common.c
 *
 * Core functions for Marvell Orion 5x SoCs
 *
 * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2.  This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/serial_8250.h>
#include <linux/mv643xx_i2c.h>
#include <linux/ata_platform.h>
#include <linux/delay.h>
#include <linux/clk-provider.h>
#include <net/dsa.h>
#include <asm/page.h>
#include <asm/setup.h>
#include <asm/system_misc.h>
#include <asm/timex.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <mach/bridge-regs.h>
#include <mach/hardware.h>
#include <mach/orion5x.h>
#include <linux/platform_data/mtd-orion_nand.h>
#include <linux/platform_data/usb-ehci-orion.h>
#include <plat/time.h>
#include <plat/common.h>
#include <plat/addr-map.h>
#include "common.h"

/*****************************************************************************
 * I/O Address Mapping
 ****************************************************************************/
static struct map_desc orion5x_io_desc[] __initdata = {
	{
		.virtual	= (unsigned long) ORION5X_REGS_VIRT_BASE,
		.pfn		= __phys_to_pfn(ORION5X_REGS_PHYS_BASE),
		.length		= ORION5X_REGS_SIZE,
		.type		= MT_DEVICE,
	}, {
		.virtual	= (unsigned long) ORION5X_PCIE_WA_VIRT_BASE,
		.pfn		= __phys_to_pfn(ORION5X_PCIE_WA_PHYS_BASE),
		.length		= ORION5X_PCIE_WA_SIZE,
		.type		= MT_DEVICE,
	},
};

void __init orion5x_map_io(void)
{
	iotable_init(orion5x_io_desc, ARRAY_SIZE(orion5x_io_desc));
}


/*****************************************************************************
 * CLK tree
 ****************************************************************************/
static struct clk *tclk;

void __init clk_init(void)
{
	tclk = clk_register_fixed_rate(NULL, "tclk", NULL, CLK_IS_ROOT,
				       orion5x_tclk);

	orion_clkdev_init(tclk);
}

/*****************************************************************************
 * EHCI0
 ****************************************************************************/
void __init orion5x_ehci0_init(void)
{
	orion_ehci_init(ORION5X_USB0_PHYS_BASE, IRQ_ORION5X_USB0_CTRL,
			EHCI_PHY_ORION);
}


/*****************************************************************************
 * EHCI1
 ****************************************************************************/
void __init orion5x_ehci1_init(void)
{
	orion_ehci_1_init(ORION5X_USB1_PHYS_BASE, IRQ_ORION5X_USB1_CTRL);
}


/*****************************************************************************
 * GE00
 ****************************************************************************/
void __init orion5x_eth_init(struct mv643xx_eth_platform_data *eth_data)
{
	orion_ge00_init(eth_data,
			ORION5X_ETH_PHYS_BASE, IRQ_ORION5X_ETH_SUM,
			IRQ_ORION5X_ETH_ERR,
			MV643XX_TX_CSUM_DEFAULT_LIMIT);
}


/*****************************************************************************
 * Ethernet switch
 ****************************************************************************/
void __init orion5x_eth_switch_init(struct dsa_platform_data *d, int irq)
{
	orion_ge00_switch_init(d, irq);
}


/*****************************************************************************
 * I2C
 ****************************************************************************/
void __init orion5x_i2c_init(void)
{
	orion_i2c_init(I2C_PHYS_BASE, IRQ_ORION5X_I2C, 8);

}


/*****************************************************************************
 * SATA
 ****************************************************************************/
void __init orion5x_sata_init(struct mv_sata_platform_data *sata_data)
{
	orion_sata_init(sata_data, ORION5X_SATA_PHYS_BASE, IRQ_ORION5X_SATA);
}


/*****************************************************************************
 * SPI
 ****************************************************************************/
void __init orion5x_spi_init()
{
	orion_spi_init(SPI_PHYS_BASE);
}


/*****************************************************************************
 * UART0
 ****************************************************************************/
void __init orion5x_uart0_init(void)
{
	orion_uart0_init(UART0_VIRT_BASE, UART0_PHYS_BASE,
			 IRQ_ORION5X_UART0, tclk);
}

/*****************************************************************************
 * UART1
 ****************************************************************************/
void __init orion5x_uart1_init(void)
{
	orion_uart1_init(UART1_VIRT_BASE, UART1_PHYS_BASE,
			 IRQ_ORION5X_UART1, tclk);
}

/*****************************************************************************
 * XOR engine
 ****************************************************************************/
void __init orion5x_xor_init(void)
{
	orion_xor0_init(ORION5X_XOR_PHYS_BASE,
			ORION5X_XOR_PHYS_BASE + 0x200,
			IRQ_ORION5X_XOR0, IRQ_ORION5X_XOR1);
}

/*****************************************************************************
 * Cryptographic Engines and Security Accelerator (CESA)
 ****************************************************************************/
static void __init orion5x_crypto_init(void)
{
	orion5x_setup_sram_win();
	orion_crypto_init(ORION5X_CRYPTO_PHYS_BASE, ORION5X_SRAM_PHYS_BASE,
			  SZ_8K, IRQ_ORION5X_CESA);
}

/*****************************************************************************
 * Watchdog
 ****************************************************************************/
void __init orion5x_wdt_init(void)
{
	orion_wdt_init();
}


/*****************************************************************************
 * Time handling
 ****************************************************************************/
void __init orion5x_init_early(void)
{
	orion_time_set_base(TIMER_VIRT_BASE);

	/*
	 * Some Orion5x devices allocate their coherent buffers from atomic
	 * context. Increase size of atomic coherent pool to make sure such
	 * the allocations won't fail.
	 */
	init_dma_coherent_pool_size(SZ_1M);
}

int orion5x_tclk;

int __init orion5x_find_tclk(void)
{
	u32 dev, rev;

	orion5x_pcie_id(&dev, &rev);
	if (dev == MV88F6183_DEV_ID &&
	    (readl(MPP_RESET_SAMPLE) & 0x00000200) == 0)
		return 133333333;

	return 166666667;
}

static void __init orion5x_timer_init(void)
{
	orion5x_tclk = orion5x_find_tclk();

	orion_time_init(ORION5X_BRIDGE_VIRT_BASE, BRIDGE_INT_TIMER1_CLR,
			IRQ_ORION5X_BRIDGE, orion5x_tclk);
}

struct sys_timer orion5x_timer = {
	.init = orion5x_timer_init,
};


/*****************************************************************************
 * General
 ****************************************************************************/
/*
 * Identify device ID and rev from PCIe configuration header space '0'.
 */
void __init orion5x_id(u32 *dev, u32 *rev, char **dev_name)
{
	orion5x_pcie_id(dev, rev);

	if (*dev == MV88F5281_DEV_ID) {
		if (*rev == MV88F5281_REV_D2) {
			*dev_name = "MV88F5281-D2";
		} else if (*rev == MV88F5281_REV_D1) {
			*dev_name = "MV88F5281-D1";
		} else if (*rev == MV88F5281_REV_D0) {
			*dev_name = "MV88F5281-D0";
		} else {
			*dev_name = "MV88F5281-Rev-Unsupported";
		}
	} else if (*dev == MV88F5182_DEV_ID) {
		if (*rev == MV88F5182_REV_A2) {
			*dev_name = "MV88F5182-A2";
		} else {
			*dev_name = "MV88F5182-Rev-Unsupported";
		}
	} else if (*dev == MV88F5181_DEV_ID) {
		if (*rev == MV88F5181_REV_B1) {
			*dev_name = "MV88F5181-Rev-B1";
		} else if (*rev == MV88F5181L_REV_A1) {
			*dev_name = "MV88F5181L-Rev-A1";
		} else {
			*dev_name = "MV88F5181(L)-Rev-Unsupported";
		}
	} else if (*dev == MV88F6183_DEV_ID) {
		if (*rev == MV88F6183_REV_B0) {
			*dev_name = "MV88F6183-Rev-B0";
		} else {
			*dev_name = "MV88F6183-Rev-Unsupported";
		}
	} else {
		*dev_name = "Device-Unknown";
	}
}

void __init orion5x_init(void)
{
	char *dev_name;
	u32 dev, rev;

	orion5x_id(&dev, &rev, &dev_name);
	printk(KERN_INFO "Orion ID: %s. TCLK=%d.\n", dev_name, orion5x_tclk);

	/*
	 * Setup Orion address map
	 */
	orion5x_setup_cpu_mbus_bridge();

	/* Setup root of clk tree */
	clk_init();

	/*
	 * Don't issue "Wait for Interrupt" instruction if we are
	 * running on D0 5281 silicon.
	 */
	if (dev == MV88F5281_DEV_ID && rev == MV88F5281_REV_D0) {
		printk(KERN_INFO "Orion: Applying 5281 D0 WFI workaround.\n");
		disable_hlt();
	}

	/*
	 * The 5082/5181l/5182/6082/6082l/6183 have crypto
	 * while 5180n/5181/5281 don't have crypto.
	 */
	if ((dev == MV88F5181_DEV_ID && rev >= MV88F5181L_REV_A0) ||
	    dev == MV88F5182_DEV_ID || dev == MV88F6183_DEV_ID)
		orion5x_crypto_init();

	/*
	 * Register watchdog driver
	 */
	orion5x_wdt_init();
}

void orion5x_restart(char mode, const char *cmd)
{
	/*
	 * Enable and issue soft reset
	 */
	orion5x_setbits(RSTOUTn_MASK, (1 << 2));
	orion5x_setbits(CPU_SOFT_RESET, 1);
	mdelay(200);
	orion5x_clrbits(CPU_SOFT_RESET, 1);
}

/*
 * Many orion-based systems have buggy bootloader implementations.
 * This is a common fixup for bogus memory tags.
 */
void __init tag_fixup_mem32(struct tag *t, char **from,
			    struct meminfo *meminfo)
{
	for (; t->hdr.size; t = tag_next(t))
		if (t->hdr.tag == ATAG_MEM &&
		    (!t->u.mem.size || t->u.mem.size & ~PAGE_MASK ||
		     t->u.mem.start & ~PAGE_MASK)) {
			printk(KERN_WARNING
			       "Clearing invalid memory bank %dKB@0x%08x\n",
			       t->u.mem.size / 1024, t->u.mem.start);
			t->hdr.tag = 0;
		}
}