/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/export.h>
#include <bcm63xx_dev_enet.h>
#include <bcm63xx_io.h>
#include <bcm63xx_regs.h>

static const unsigned long bcm6348_regs_enetdmac[] = {
        [ENETDMAC_CHANCFG]      = ENETDMAC_CHANCFG_REG,
        [ENETDMAC_IR]           = ENETDMAC_IR_REG,
        [ENETDMAC_IRMASK]       = ENETDMAC_IRMASK_REG,
        [ENETDMAC_MAXBURST]     = ENETDMAC_MAXBURST_REG,
};

static const unsigned long bcm6345_regs_enetdmac[] = {
        [ENETDMAC_CHANCFG]      = ENETDMA_6345_CHANCFG_REG,
        [ENETDMAC_IR]           = ENETDMA_6345_IR_REG,
        [ENETDMAC_IRMASK]       = ENETDMA_6345_IRMASK_REG,
        [ENETDMAC_MAXBURST]     = ENETDMA_6345_MAXBURST_REG,
        [ENETDMAC_BUFALLOC]     = ENETDMA_6345_BUFALLOC_REG,
        [ENETDMAC_RSTART]       = ENETDMA_6345_RSTART_REG,
        [ENETDMAC_FC]           = ENETDMA_6345_FC_REG,
        [ENETDMAC_LEN]          = ENETDMA_6345_LEN_REG,
};

const unsigned long *bcm63xx_regs_enetdmac;
EXPORT_SYMBOL(bcm63xx_regs_enetdmac);

static __init void bcm63xx_enetdmac_regs_init(void)
{
        if (BCMCPU_IS_6345())
                bcm63xx_regs_enetdmac = bcm6345_regs_enetdmac;
        else
                bcm63xx_regs_enetdmac = bcm6348_regs_enetdmac;
}

static struct resource shared_res[] = {
        {
                .start          = -1, /* filled at runtime */
                .end            = -1, /* filled at runtime */
                .flags          = IORESOURCE_MEM,
        },
        {
                .start          = -1, /* filled at runtime */
                .end            = -1, /* filled at runtime */
                .flags          = IORESOURCE_MEM,
        },
        {
                .start          = -1, /* filled at runtime */
                .end            = -1, /* filled at runtime */
                .flags          = IORESOURCE_MEM,
        },
};

static struct platform_device bcm63xx_enet_shared_device = {
        .name           = "bcm63xx_enet_shared",
        .id             = 0,
        .num_resources  = ARRAY_SIZE(shared_res),
        .resource       = shared_res,
};

static int shared_device_registered;

static u64 enet_dmamask = DMA_BIT_MASK(32);

static struct resource enet0_res[] = {
        {
                .start          = -1, /* filled at runtime */
                .end            = -1, /* filled at runtime */
                .flags          = IORESOURCE_MEM,
        },
        {
                .start          = -1, /* filled at runtime */
                .flags          = IORESOURCE_IRQ,
        },
        {
                .start          = -1, /* filled at runtime */
                .flags          = IORESOURCE_IRQ,
        },
        {
                .start          = -1, /* filled at runtime */
                .flags          = IORESOURCE_IRQ,
        },
};

static struct bcm63xx_enet_platform_data enet0_pd;

static struct platform_device bcm63xx_enet0_device = {
        .name           = "bcm63xx_enet",
        .id             = 0,
        .num_resources  = ARRAY_SIZE(enet0_res),
        .resource       = enet0_res,
        .dev            = {
                .platform_data = &enet0_pd,
                .dma_mask = &enet_dmamask,
                .coherent_dma_mask = DMA_BIT_MASK(32),
        },
};

static struct resource enet1_res[] = {
        {
                .start          = -1, /* filled at runtime */
                .end            = -1, /* filled at runtime */
                .flags          = IORESOURCE_MEM,
        },
        {
                .start          = -1, /* filled at runtime */
                .flags          = IORESOURCE_IRQ,
        },
        {
                .start          = -1, /* filled at runtime */
                .flags          = IORESOURCE_IRQ,
        },
        {
                .start          = -1, /* filled at runtime */
                .flags          = IORESOURCE_IRQ,
        },
};

static struct bcm63xx_enet_platform_data enet1_pd;

static struct platform_device bcm63xx_enet1_device = {
        .name           = "bcm63xx_enet",
        .id             = 1,
        .num_resources  = ARRAY_SIZE(enet1_res),
        .resource       = enet1_res,
        .dev            = {
                .platform_data = &enet1_pd,
                .dma_mask = &enet_dmamask,
                .coherent_dma_mask = DMA_BIT_MASK(32),
        },
};

static struct resource enetsw_res[] = {
        {
                /* start & end filled at runtime */
                .flags          = IORESOURCE_MEM,
        },
        {
                /* start filled at runtime */
                .flags          = IORESOURCE_IRQ,
        },
        {
                /* start filled at runtime */
                .flags          = IORESOURCE_IRQ,
        },
};

static struct bcm63xx_enetsw_platform_data enetsw_pd;

static struct platform_device bcm63xx_enetsw_device = {
        .name           = "bcm63xx_enetsw",
        .num_resources  = ARRAY_SIZE(enetsw_res),
        .resource       = enetsw_res,
        .dev            = {
                .platform_data = &enetsw_pd,
                .dma_mask = &enet_dmamask,
                .coherent_dma_mask = DMA_BIT_MASK(32),
        },
};

static int __init register_shared(void)
{
        int ret, chan_count;

        if (shared_device_registered)
                return 0;

        bcm63xx_enetdmac_regs_init();

        shared_res[0].start = bcm63xx_regset_address(RSET_ENETDMA);
        shared_res[0].end = shared_res[0].start;
        if (BCMCPU_IS_6345())
                shared_res[0].end += (RSET_6345_ENETDMA_SIZE) - 1;
        else
                shared_res[0].end += (RSET_ENETDMA_SIZE)  - 1;

        if (BCMCPU_IS_6328() || BCMCPU_IS_6362() || BCMCPU_IS_6368())
                chan_count = 32;
        else if (BCMCPU_IS_6345())
                chan_count = 8;
        else
                chan_count = 16;

        shared_res[1].start = bcm63xx_regset_address(RSET_ENETDMAC);
        shared_res[1].end = shared_res[1].start;
        shared_res[1].end += RSET_ENETDMAC_SIZE(chan_count)  - 1;

        shared_res[2].start = bcm63xx_regset_address(RSET_ENETDMAS);
        shared_res[2].end = shared_res[2].start;
        shared_res[2].end += RSET_ENETDMAS_SIZE(chan_count)  - 1;

        ret = platform_device_register(&bcm63xx_enet_shared_device);
        if (ret)
                return ret;
        shared_device_registered = 1;

        return 0;
}

int __init bcm63xx_enet_register(int unit,
                                 const struct bcm63xx_enet_platform_data *pd)
{
        struct platform_device *pdev;
        struct bcm63xx_enet_platform_data *dpd;
        int ret;

        if (unit > 1)
                return -ENODEV;

        if (unit == 1 && (BCMCPU_IS_6338() || BCMCPU_IS_6345()))
                return -ENODEV;

        ret = register_shared();
        if (ret)
                return ret;

        if (unit == 0) {
                enet0_res[0].start = bcm63xx_regset_address(RSET_ENET0);
                enet0_res[0].end = enet0_res[0].start;
                enet0_res[0].end += RSET_ENET_SIZE - 1;
                enet0_res[1].start = bcm63xx_get_irq_number(IRQ_ENET0);
                enet0_res[2].start = bcm63xx_get_irq_number(IRQ_ENET0_RXDMA);
                enet0_res[3].start = bcm63xx_get_irq_number(IRQ_ENET0_TXDMA);
                pdev = &bcm63xx_enet0_device;
        } else {
                enet1_res[0].start = bcm63xx_regset_address(RSET_ENET1);
                enet1_res[0].end = enet1_res[0].start;
                enet1_res[0].end += RSET_ENET_SIZE - 1;
                enet1_res[1].start = bcm63xx_get_irq_number(IRQ_ENET1);
                enet1_res[2].start = bcm63xx_get_irq_number(IRQ_ENET1_RXDMA);
                enet1_res[3].start = bcm63xx_get_irq_number(IRQ_ENET1_TXDMA);
                pdev = &bcm63xx_enet1_device;
        }

        /* copy given platform data */
        dpd = pdev->dev.platform_data;
        memcpy(dpd, pd, sizeof(*pd));

        /* adjust them in case internal phy is used */
        if (dpd->use_internal_phy) {

                /* internal phy only exists for enet0 */
                if (unit == 1)
                        return -ENODEV;

                dpd->phy_id = 1;
                dpd->has_phy_interrupt = 1;
                dpd->phy_interrupt = bcm63xx_get_irq_number(IRQ_ENET_PHY);
        }

        dpd->dma_chan_en_mask = ENETDMAC_CHANCFG_EN_MASK;
        dpd->dma_chan_int_mask = ENETDMAC_IR_PKTDONE_MASK;
        if (BCMCPU_IS_6345()) {
                dpd->dma_chan_en_mask |= ENETDMAC_CHANCFG_CHAINING_MASK;
                dpd->dma_chan_en_mask |= ENETDMAC_CHANCFG_WRAP_EN_MASK;
                dpd->dma_chan_en_mask |= ENETDMAC_CHANCFG_FLOWC_EN_MASK;
                dpd->dma_chan_int_mask |= ENETDMA_IR_BUFDONE_MASK;
                dpd->dma_chan_int_mask |= ENETDMA_IR_NOTOWNER_MASK;
                dpd->dma_chan_width = ENETDMA_6345_CHAN_WIDTH;
                dpd->dma_desc_shift = ENETDMA_6345_DESC_SHIFT;
        } else {
                dpd->dma_has_sram = true;
                dpd->dma_chan_width = ENETDMA_CHAN_WIDTH;
        }

        if (unit == 0) {
                dpd->rx_chan = 0;
                dpd->tx_chan = 1;
        } else {
                dpd->rx_chan = 2;
                dpd->tx_chan = 3;
        }

        ret = platform_device_register(pdev);
        if (ret)
                return ret;
        return 0;
}

int __init
bcm63xx_enetsw_register(const struct bcm63xx_enetsw_platform_data *pd)
{
        int ret;

        if (!BCMCPU_IS_6328() && !BCMCPU_IS_6362() && !BCMCPU_IS_6368())
                return -ENODEV;

        ret = register_shared();
        if (ret)
                return ret;

        enetsw_res[0].start = bcm63xx_regset_address(RSET_ENETSW);
        enetsw_res[0].end = enetsw_res[0].start;
        enetsw_res[0].end += RSET_ENETSW_SIZE - 1;
        enetsw_res[1].start = bcm63xx_get_irq_number(IRQ_ENETSW_RXDMA0);
        enetsw_res[2].start = bcm63xx_get_irq_number(IRQ_ENETSW_TXDMA0);
        if (!enetsw_res[2].start)
                enetsw_res[2].start = -1;

        memcpy(bcm63xx_enetsw_device.dev.platform_data, pd, sizeof(*pd));

        if (BCMCPU_IS_6328())
                enetsw_pd.num_ports = ENETSW_PORTS_6328;
        else if (BCMCPU_IS_6362() || BCMCPU_IS_6368())
                enetsw_pd.num_ports = ENETSW_PORTS_6368;

        enetsw_pd.dma_has_sram = true;
        enetsw_pd.dma_chan_width = ENETDMA_CHAN_WIDTH;
        enetsw_pd.dma_chan_en_mask = ENETDMAC_CHANCFG_EN_MASK;
        enetsw_pd.dma_chan_int_mask = ENETDMAC_IR_PKTDONE_MASK;

        ret = platform_device_register(&bcm63xx_enetsw_device);
        if (ret)
                return ret;

        return 0;
}