// SPDX-License-Identifier: GPL-2.0
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/ata_platform.h>

#include <asm/sibyte/board.h>
#include <asm/sibyte/sb1250_genbus.h>
#include <asm/sibyte/sb1250_regs.h>

#if defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR)

#define DRV_NAME        "pata-swarm"

#define SWARM_IDE_SHIFT 5
#define SWARM_IDE_BASE  0x1f0
#define SWARM_IDE_CTRL  0x3f6

static struct resource swarm_pata_resource[] = {
        {
                .name   = "Swarm GenBus IDE",
                .flags  = IORESOURCE_MEM,
        }, {
                .name   = "Swarm GenBus IDE",
                .flags  = IORESOURCE_MEM,
        }, {
                .name   = "Swarm GenBus IDE",
                .flags  = IORESOURCE_IRQ,
                .start  = K_INT_GB_IDE,
                .end    = K_INT_GB_IDE,
        },
};

static struct pata_platform_info pata_platform_data = {
        .ioport_shift   = SWARM_IDE_SHIFT,
};

static struct platform_device swarm_pata_device = {
        .name           = "pata_platform",
        .id             = -1,
        .resource       = swarm_pata_resource,
        .num_resources  = ARRAY_SIZE(swarm_pata_resource),
        .dev  = {
                .platform_data          = &pata_platform_data,
                .coherent_dma_mask      = ~0,   /* grumble */
        },
};

static int __init swarm_pata_init(void)
{
        u8 __iomem *base;
        phys_addr_t offset, size;
        struct resource *r;

        if (!SIBYTE_HAVE_IDE)
                return -ENODEV;

        base = ioremap(A_IO_EXT_BASE, 0x800);
        offset = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS));
        size = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_MULT_SIZE, IDE_CS));
        iounmap(base);

        offset = G_IO_START_ADDR(offset) << S_IO_ADDRBASE;
        size = (G_IO_MULT_SIZE(size) + 1) << S_IO_REGSIZE;
        if (offset < A_PHYS_GENBUS || offset >= A_PHYS_GENBUS_END) {
                pr_info(DRV_NAME ": PATA interface at GenBus disabled\n");

                return -EBUSY;
        }

        pr_info(DRV_NAME ": PATA interface at GenBus slot %i\n", IDE_CS);

        r = swarm_pata_resource;
        r[0].start = offset + (SWARM_IDE_BASE << SWARM_IDE_SHIFT);
        r[0].end   = offset + ((SWARM_IDE_BASE + 8) << SWARM_IDE_SHIFT) - 1;
        r[1].start = offset + (SWARM_IDE_CTRL << SWARM_IDE_SHIFT);
        r[1].end   = offset + ((SWARM_IDE_CTRL + 1) << SWARM_IDE_SHIFT) - 1;

        return platform_device_register(&swarm_pata_device);
}

device_initcall(swarm_pata_init);

#endif /* defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR) */

#define sb1250_dev_struct(num) \
        static struct resource sb1250_res##num = {              \
                .name = "SB1250 MAC " __stringify(num),         \
                .flags = IORESOURCE_MEM,                        \
                .start = A_MAC_CHANNEL_BASE(num),               \
                .end = A_MAC_CHANNEL_BASE(num + 1) - 1,         \
        };\
        static struct platform_device sb1250_dev##num = {       \
                .name = "sb1250-mac",                           \
                .id = num,                                      \
                .resource = &sb1250_res##num,                   \
                .num_resources = 1,                             \
        }

sb1250_dev_struct(0);
sb1250_dev_struct(1);
sb1250_dev_struct(2);
sb1250_dev_struct(3);

static struct platform_device *sb1250_devs[] __initdata = {
        &sb1250_dev0,
        &sb1250_dev1,
        &sb1250_dev2,
        &sb1250_dev3,
};

static int __init sb1250_device_init(void)
{
        int ret;

        /* Set the number of available units based on the SOC type.  */
        switch (soc_type) {
        case K_SYS_SOC_TYPE_BCM1250:
        case K_SYS_SOC_TYPE_BCM1250_ALT:
                ret = platform_add_devices(sb1250_devs, 3);
                break;
        case K_SYS_SOC_TYPE_BCM1120:
        case K_SYS_SOC_TYPE_BCM1125:
        case K_SYS_SOC_TYPE_BCM1125H:
        case K_SYS_SOC_TYPE_BCM1250_ALT2:       /* Hybrid */
                ret = platform_add_devices(sb1250_devs, 2);
                break;
        case K_SYS_SOC_TYPE_BCM1x55:
        case K_SYS_SOC_TYPE_BCM1x80:
                ret = platform_add_devices(sb1250_devs, 4);
                break;
        default:
                ret = -ENODEV;
                break;
        }
        return ret;
}
device_initcall(sb1250_device_init);