uboot-phytec

// SPDX-License-Identifier: GPL-2.0+

/*

 * Faraday 10/100Mbps Ethernet Controller

 *

 * (C) Copyright 2013 Faraday Technology

 * Dante Su <dantesu@faraday-tech.com>

 */

​

#include <common.h>

#include <command.h>

#include <malloc.h>

#include <net.h>

#include <linux/errno.h>

#include <asm/io.h>

#include <asm/dma-mapping.h>

​

#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)

#include <miiphy.h>

#endif

​

#include "ftmac110.h"

​

#define CFG_RXDES_NUM   8

#define CFG_TXDES_NUM   2

#define CFG_XBUF_SIZE   1536

​

#define CFG_MDIORD_TIMEOUT  (CONFIG_SYS_HZ >> 1) /* 500 ms */

#define CFG_MDIOWR_TIMEOUT  (CONFIG_SYS_HZ >> 1) /* 500 ms */

#define CFG_LINKUP_TIMEOUT  (CONFIG_SYS_HZ << 2) /* 4 sec */

​

/*

 * FTMAC110 DMA design issue

 *

 * Its DMA engine has a weird restriction that its Rx DMA engine

 * accepts only 16-bits aligned address, 32-bits aligned is not

 * acceptable. However this restriction does not apply to Tx DMA.

 *

 * Conclusion:

 * (1) Tx DMA Buffer Address:

 *     1 bytes aligned: Invalid

 *     2 bytes aligned: O.K

 *     4 bytes aligned: O.K (-> u-boot ZeroCopy is possible)

 * (2) Rx DMA Buffer Address:

 *     1 bytes aligned: Invalid

 *     2 bytes aligned: O.K

 *     4 bytes aligned: Invalid

 */

​

struct ftmac110_chip {

    void __iomem *regs;

    uint32_t imr;

    uint32_t maccr;

    uint32_t lnkup;

    uint32_t phy_addr;

​

    struct ftmac110_desc *rxd;

    ulong                rxd_dma;

    uint32_t             rxd_idx;

​

    struct ftmac110_desc *txd;

    ulong                txd_dma;

    uint32_t             txd_idx;

};

​

static int ftmac110_reset(struct eth_device *dev);

​

static uint16_t mdio_read(struct eth_device *dev,

    uint8_t phyaddr, uint8_t phyreg)

{

    struct ftmac110_chip *chip = dev->priv;

    struct ftmac110_regs *regs = chip->regs;

    uint32_t tmp, ts;

    uint16_t ret = 0xffff;

​

    tmp = PHYCR_READ

        | (phyaddr << PHYCR_ADDR_SHIFT)

        | (phyreg  << PHYCR_REG_SHIFT);

​

    writel(tmp, &regs->phycr);

​

    for (ts = get_timer(0); get_timer(ts) < CFG_MDIORD_TIMEOUT; ) {

        tmp = readl(&regs->phycr);

        if (tmp & PHYCR_READ)

            continue;

        break;

    }

​

    if (tmp & PHYCR_READ)

        printf("ftmac110: mdio read timeout\n");

    else

        ret = (uint16_t)(tmp & 0xffff);

​