// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *
 * arch/xtensa/platform/xtavnet/setup.c
 *
 * ...
 *
 * Authors:     Chris Zankel <chris@zankel.net>
 *              Joe Taylor <joe@tensilica.com>
 *
 * Copyright 2001 - 2006 Tensilica Inc.
 */
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/kdev_t.h>
#include <linux/types.h>
#include <linux/major.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/clk-provider.h>
#include <linux/of_address.h>
#include <linux/slab.h>

#include <asm/timex.h>
#include <asm/processor.h>
#include <asm/platform.h>
#include <asm/bootparam.h>
#include <platform/lcd.h>
#include <platform/hardware.h>

static int xtfpga_power_off(struct sys_off_data *unused)
{
        lcd_disp_at_pos("POWEROFF", 0);
        local_irq_disable();
        while (1)
                cpu_relax();
        return NOTIFY_DONE;
}

static int xtfpga_restart(struct notifier_block *this,
                          unsigned long event, void *ptr)
{
        /* Try software reset first. */
        WRITE_ONCE(*(u32 *)XTFPGA_SWRST_VADDR, 0xdead);

        /* If software reset did not work, flush and reset the mmu,
         * simulate a processor reset, and jump to the reset vector.
         */
        cpu_reset();

        return NOTIFY_DONE;
}

static struct notifier_block xtfpga_restart_block = {
        .notifier_call = xtfpga_restart,
};

#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT

void __init platform_calibrate_ccount(void)
{
        ccount_freq = *(long *)XTFPGA_CLKFRQ_VADDR;
}

#endif

static void __init xtfpga_register_handlers(void)
{
        register_restart_handler(&xtfpga_restart_block);
        register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
                                 SYS_OFF_PRIO_DEFAULT,
                                 xtfpga_power_off, NULL);
}

#ifdef CONFIG_USE_OF

static void __init xtfpga_clk_setup(struct device_node *np)
{
        void __iomem *base = of_iomap(np, 0);
        struct clk *clk;
        u32 freq;

        if (!base) {
                pr_err("%pOFn: invalid address\n", np);
                return;
        }

        freq = __raw_readl(base);
        iounmap(base);
        clk = clk_register_fixed_rate(NULL, np->name, NULL, 0, freq);

        if (IS_ERR(clk)) {
                pr_err("%pOFn: clk registration failed\n", np);
                return;
        }

        if (of_clk_add_provider(np, of_clk_src_simple_get, clk)) {
                pr_err("%pOFn: clk provider registration failed\n", np);
                return;
        }
}
CLK_OF_DECLARE(xtfpga_clk, "cdns,xtfpga-clock", xtfpga_clk_setup);

#define MAC_LEN 6
static void __init update_local_mac(struct device_node *node)
{
        struct property *newmac;
        const u8* macaddr;
        int prop_len;

        macaddr = of_get_property(node, "local-mac-address", &prop_len);
        if (macaddr == NULL || prop_len != MAC_LEN)
                return;

        newmac = kzalloc(sizeof(*newmac) + MAC_LEN, GFP_KERNEL);
        if (newmac == NULL)
                return;

        newmac->value = newmac + 1;
        newmac->length = MAC_LEN;
        newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
        if (newmac->name == NULL) {
                kfree(newmac);
                return;
        }

        memcpy(newmac->value, macaddr, MAC_LEN);
        ((u8*)newmac->value)[5] = (*(u32*)DIP_SWITCHES_VADDR) & 0x3f;
        of_update_property(node, newmac);
}

static int __init machine_setup(void)
{
        struct device_node *eth = NULL;

        if ((eth = of_find_compatible_node(eth, NULL, "opencores,ethoc")))
                update_local_mac(eth);
        of_node_put(eth);

        xtfpga_register_handlers();

        return 0;
}
arch_initcall(machine_setup);

#else

#include <linux/serial_8250.h>
#include <linux/if.h>
#include <net/ethoc.h>
#include <linux/usb/c67x00.h>

/*----------------------------------------------------------------------------
 *  Ethernet -- OpenCores Ethernet MAC (ethoc driver)
 */

static struct resource ethoc_res[] = {
        [0] = { /* register space */
                .start = OETH_REGS_PADDR,
                .end   = OETH_REGS_PADDR + OETH_REGS_SIZE - 1,
                .flags = IORESOURCE_MEM,
        },
        [1] = { /* buffer space */
                .start = OETH_SRAMBUFF_PADDR,
                .end   = OETH_SRAMBUFF_PADDR + OETH_SRAMBUFF_SIZE - 1,
                .flags = IORESOURCE_MEM,
        },
        [2] = { /* IRQ number */
                .start = XTENSA_PIC_LINUX_IRQ(OETH_IRQ),
                .end   = XTENSA_PIC_LINUX_IRQ(OETH_IRQ),
                .flags = IORESOURCE_IRQ,
        },
};

static struct ethoc_platform_data ethoc_pdata = {
        /*
         * The MAC address for these boards is 00:50:c2:13:6f:xx.
         * The last byte (here as zero) is read from the DIP switches on the
         * board.
         */
        .hwaddr = { 0x00, 0x50, 0xc2, 0x13, 0x6f, 0 },
        .phy_id = -1,
        .big_endian = XCHAL_HAVE_BE,
};

static struct platform_device ethoc_device = {
        .name = "ethoc",
        .id = -1,
        .num_resources = ARRAY_SIZE(ethoc_res),
        .resource = ethoc_res,
        .dev = {
                .platform_data = &ethoc_pdata,
        },
};

/*----------------------------------------------------------------------------
 *  USB Host/Device -- Cypress CY7C67300
 */

static struct resource c67x00_res[] = {
        [0] = { /* register space */
                .start = C67X00_PADDR,
                .end   = C67X00_PADDR + C67X00_SIZE - 1,
                .flags = IORESOURCE_MEM,
        },
        [1] = { /* IRQ number */
                .start = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ),
                .end   = XTENSA_PIC_LINUX_IRQ(C67X00_IRQ),
                .flags = IORESOURCE_IRQ,
        },
};

static struct c67x00_platform_data c67x00_pdata = {
        .sie_config = C67X00_SIE1_HOST | C67X00_SIE2_UNUSED,
        .hpi_regstep = 4,
};

static struct platform_device c67x00_device = {
        .name = "c67x00",
        .id = -1,
        .num_resources = ARRAY_SIZE(c67x00_res),
        .resource = c67x00_res,
        .dev = {
                .platform_data = &c67x00_pdata,
        },
};

/*----------------------------------------------------------------------------
 *  UART
 */

static struct resource serial_resource = {
        .start  = DUART16552_PADDR,
        .end    = DUART16552_PADDR + 0x1f,
        .flags  = IORESOURCE_MEM,
};

static struct plat_serial8250_port serial_platform_data[] = {
        [0] = {
                .mapbase        = DUART16552_PADDR,
                .irq            = XTENSA_PIC_LINUX_IRQ(DUART16552_INTNUM),
                .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
                                  UPF_IOREMAP,
                .iotype         = XCHAL_HAVE_BE ? UPIO_MEM32BE : UPIO_MEM32,
                .regshift       = 2,
                .uartclk        = 0,    /* set in xtavnet_init() */
        },
        { },
};

static struct platform_device xtavnet_uart = {
        .name           = "serial8250",
        .id             = PLAT8250_DEV_PLATFORM,
        .dev            = {
                .platform_data  = serial_platform_data,
        },
        .num_resources  = 1,
        .resource       = &serial_resource,
};

/* platform devices */
static struct platform_device *platform_devices[] __initdata = {
        &ethoc_device,
        &c67x00_device,
        &xtavnet_uart,
};


static int __init xtavnet_init(void)
{
        /* Ethernet MAC address.  */
        ethoc_pdata.hwaddr[5] = *(u32 *)DIP_SWITCHES_VADDR;

        /* Clock rate varies among FPGA bitstreams; board specific FPGA register
         * reports the actual clock rate.
         */
        serial_platform_data[0].uartclk = *(long *)XTFPGA_CLKFRQ_VADDR;


        /* register platform devices */
        platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));

        /* ETHOC driver is a bit quiet; at least display Ethernet MAC, so user
         * knows whether they set it correctly on the DIP switches.
         */
        pr_info("XTFPGA: Ethernet MAC %pM\n", ethoc_pdata.hwaddr);
        ethoc_pdata.eth_clkfreq = *(long *)XTFPGA_CLKFRQ_VADDR;

        xtfpga_register_handlers();

        return 0;
}

/*
 * Register to be done during do_initcalls().
 */
arch_initcall(xtavnet_init);

#endif /* CONFIG_USE_OF */