// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * arch/arm/mach-iop32x/glantank.c
 *
 * Board support code for the GLAN Tank.
 *
 * Copyright (C) 2006, 2007 Martin Michlmayr <tbm@cyrius.com>
 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
 */

#include <linux/mm.h>
#include <linux/init.h>
#include <linux/f75375s.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/string.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/mtd/physmap.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/gpio/machine.h>
#include <asm/irq.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/pci.h>
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <asm/page.h>

#include "hardware.h"
#include "gpio-iop32x.h"
#include "irqs.h"

/*
 * GLAN Tank timer tick configuration.
 */
static void __init glantank_timer_init(void)
{
        /* 33.333 MHz crystal.  */
        iop_init_time(200000000);
}


/*
 * GLAN Tank I/O.
 */
static struct map_desc glantank_io_desc[] __initdata = {
        {       /* on-board devices */
                .virtual        = GLANTANK_UART,
                .pfn            = __phys_to_pfn(GLANTANK_UART),
                .length         = 0x00100000,
                .type           = MT_DEVICE
        },
};

void __init glantank_map_io(void)
{
        iop3xx_map_io();
        iotable_init(glantank_io_desc, ARRAY_SIZE(glantank_io_desc));
}


/*
 * GLAN Tank PCI.
 */
#define INTA    IRQ_IOP32X_XINT0
#define INTB    IRQ_IOP32X_XINT1
#define INTC    IRQ_IOP32X_XINT2
#define INTD    IRQ_IOP32X_XINT3

static int __init
glantank_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
        static int pci_irq_table[][4] = {
                /*
                 * PCI IDSEL/INTPIN->INTLINE
                 * A       B       C       D
                 */
                {INTD, INTD, INTD, INTD}, /* UART (8250) */
                {INTA, INTA, INTA, INTA}, /* Ethernet (E1000) */
                {INTB, INTB, INTB, INTB}, /* IDE (AEC6280R) */
                {INTC, INTC, INTC, INTC}, /* USB (NEC) */
        };

        BUG_ON(pin < 1 || pin > 4);

        return pci_irq_table[slot % 4][pin - 1];
}

static struct hw_pci glantank_pci __initdata = {
        .nr_controllers = 1,
        .ops            = &iop3xx_ops,
        .setup          = iop3xx_pci_setup,
        .preinit        = iop3xx_pci_preinit,
        .map_irq        = glantank_pci_map_irq,
};

static int __init glantank_pci_init(void)
{
        if (machine_is_glantank())
                pci_common_init(&glantank_pci);

        return 0;
}

subsys_initcall(glantank_pci_init);


/*
 * GLAN Tank machine initialization.
 */
static struct physmap_flash_data glantank_flash_data = {
        .width          = 2,
};

static struct resource glantank_flash_resource = {
        .start          = 0xf0000000,
        .end            = 0xf007ffff,
        .flags          = IORESOURCE_MEM,
};

static struct platform_device glantank_flash_device = {
        .name           = "physmap-flash",
        .id             = 0,
        .dev            = {
                .platform_data  = &glantank_flash_data,
        },
        .num_resources  = 1,
        .resource       = &glantank_flash_resource,
};

static struct plat_serial8250_port glantank_serial_port[] = {
        {
                .mapbase        = GLANTANK_UART,
                .membase        = (char *)GLANTANK_UART,
                .irq            = IRQ_IOP32X_XINT3,
                .flags          = UPF_SKIP_TEST,
                .iotype         = UPIO_MEM,
                .regshift       = 0,
                .uartclk        = 1843200,
        },
        { },
};

static struct resource glantank_uart_resource = {
        .start          = GLANTANK_UART,
        .end            = GLANTANK_UART + 7,
        .flags          = IORESOURCE_MEM,
};

static struct platform_device glantank_serial_device = {
        .name           = "serial8250",
        .id             = PLAT8250_DEV_PLATFORM,
        .dev            = {
                .platform_data          = glantank_serial_port,
        },
        .num_resources  = 1,
        .resource       = &glantank_uart_resource,
};

static struct f75375s_platform_data glantank_f75375s = {
        .pwm            = { 255, 255 },
        .pwm_enable     = { 0, 0 },
};

static struct i2c_board_info __initdata glantank_i2c_devices[] = {
        {
                I2C_BOARD_INFO("rs5c372a", 0x32),
        },
        {
                I2C_BOARD_INFO("f75375", 0x2e),
                .platform_data = &glantank_f75375s,
        },
};

static void glantank_power_off(void)
{
        __raw_writeb(0x01, IOMEM(0xfe8d0004));

        while (1)
                ;
}

static void __init glantank_init_machine(void)
{
        register_iop32x_gpio();
        gpiod_add_lookup_table(&iop3xx_i2c0_gpio_lookup);
        gpiod_add_lookup_table(&iop3xx_i2c1_gpio_lookup);
        platform_device_register(&iop3xx_i2c0_device);
        platform_device_register(&iop3xx_i2c1_device);
        platform_device_register(&glantank_flash_device);
        platform_device_register(&glantank_serial_device);
        platform_device_register(&iop3xx_dma_0_channel);
        platform_device_register(&iop3xx_dma_1_channel);

        i2c_register_board_info(0, glantank_i2c_devices,
                ARRAY_SIZE(glantank_i2c_devices));

        pm_power_off = glantank_power_off;
}

MACHINE_START(GLANTANK, "GLAN Tank")
        /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
        .atag_offset    = 0x100,
        .map_io         = glantank_map_io,
        .init_irq       = iop32x_init_irq,
        .init_time      = glantank_timer_init,
        .init_machine   = glantank_init_machine,
        .restart        = iop3xx_restart,
MACHINE_END