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/*
* COPYRIGHT (C) 2018, Real-Thread Information Technology Ltd
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2015-07-15 Bernard The first version
*/
#include <rtthread.h>
#include <netif/ethernetif.h>
#include <soc_memory_map.h>
#include <stdint.h>
#include <enet/enet.h>
#include <lwipopts.h>
#include "emac_drv.h"
#define MAX_ADDR_LEN 6
#define IMX_EMAC_DEVICE(eth) (struct emac_device*)(eth)
struct emac_device
{
/* inherit from Ethernet device */
struct eth_device parent;
imx_enet_priv_t enet_priv;
/* interface address info. */
rt_uint8_t dev_addr[MAX_ADDR_LEN]; /* MAC address */
};
static struct emac_device _emac;
#define ENET_PHY_ADDR 1
extern int imx_enet_mii_type(imx_enet_priv_t * dev, enum imx_mii_type mii_type);
extern void imx_enet_iomux(void);
extern void imx_enet_phy_reset(void);
static unsigned char s_pkt_send[2048];
static unsigned char s_pkt_recv[2048];
void init_enet(struct emac_device* emac)
{
// setup iomux for ENET
imx_enet_iomux();
imx_enet_phy_reset();
// init enet0
imx_enet_init(&emac->enet_priv, ENET_BASE_ADDR, ENET_PHY_ADDR);
imx_enet_mii_type(&emac->enet_priv, RGMII);
// init phy0.
imx_enet_phy_init(&emac->enet_priv);
// Check PHY link status.
if (!(emac->enet_priv.status & ENET_STATUS_LINK_ON))
{
rt_kprintf("ENET link status check fail\n");
}
imx_enet_start(&emac->enet_priv, emac->dev_addr);
}
void imx_enet_isr(int vector, void *param)
{
unsigned int value = 0;
imx_enet_priv_t * dev = &(_emac.enet_priv);
volatile hw_enet_t *enet_reg = dev->enet_reg;
value = enet_reg->EIR.U;
enet_reg->EIR.U = value & (~ENET_EVENT_MII);
if (value & ENET_EVENT_TX_ERR)
{
dev->tx_busy = 0;
}
else if (value & ENET_EVENT_TX)
{
dev->tx_busy = 0;
}
if (value & ENET_EVENT_RX)
{
eth_device_ready(&(_emac.parent));
}
if (value & ENET_EVENT_HBERR)
{
// printf("WARNGING[POLL]: Hearbeat error!\n");
}
if (value & ENET_EVENT_EBERR)
{
// printf("WARNING[POLL]: Ethernet Bus Error!\n");
}
}
static rt_err_t imx_emac_init(rt_device_t dev)
{
struct emac_device *emac;
emac = IMX_EMAC_DEVICE(dev);
/* initialize enet */
init_enet(emac);
return RT_EOK;
}
static rt_err_t imx_emac_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t imx_emac_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_ssize_t imx_emac_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
{
rt_set_errno(-RT_ENOSYS);
return 0;
}
static rt_ssize_t imx_emac_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
{
rt_set_errno(-RT_ENOSYS);
return 0;
}
static rt_err_t imx_emac_control(rt_device_t dev, int cmd, void *args)
{
struct emac_device *emac;
emac = IMX_EMAC_DEVICE(dev);
RT_ASSERT(emac != RT_NULL);
switch(cmd)
{
case NIOCTL_GADDR:
/* get MAC address */
if(args) rt_memcpy(args, emac->dev_addr, 6);
else return -RT_ERROR;
break;
default :
break;
}
return RT_EOK;
}
/* Ethernet device interface */
/* transmit packet. */
rt_err_t imx_emac_tx(rt_device_t dev, struct pbuf* p)
{
rt_err_t result = RT_EOK;
struct emac_device *emac;
emac = IMX_EMAC_DEVICE(dev);
RT_ASSERT(emac != RT_NULL);
/* copy pbuf to a whole ETH frame */
pbuf_copy_partial(p, s_pkt_send, p->tot_len, 0);
/* send to the enet */
imx_enet_send(&emac->enet_priv, s_pkt_send, p->tot_len, 1);
return result;
}
/* reception packet. */
struct pbuf *imx_emac_rx(rt_device_t dev)
{
int len;
struct pbuf* p = RT_NULL;
struct emac_device *emac;
emac = IMX_EMAC_DEVICE(dev);
RT_ASSERT(emac != RT_NULL);
imx_enet_recv(&emac->enet_priv, s_pkt_recv, &len);
if (len > 0)
{
/* We allocate a pbuf chain of pbufs from the pool. */
p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
if (p != RT_NULL)
{
pbuf_take(p, s_pkt_recv, len);
}
}
return p;
}
int imx_emac_hw_init(void)
{
/* test MAC address */
_emac.dev_addr[0] = 0x00;
_emac.dev_addr[1] = 0x11;
_emac.dev_addr[2] = 0x22;
_emac.dev_addr[3] = 0x33;
_emac.dev_addr[4] = 0x44;
_emac.dev_addr[5] = 0x55;
_emac.parent.parent.init = imx_emac_init;
_emac.parent.parent.open = imx_emac_open;
_emac.parent.parent.close = imx_emac_close;
_emac.parent.parent.read = imx_emac_read;
_emac.parent.parent.write = imx_emac_write;
_emac.parent.parent.control = imx_emac_control;
_emac.parent.parent.user_data = RT_NULL;
_emac.parent.eth_rx = imx_emac_rx;
_emac.parent.eth_tx = imx_emac_tx;
/* register ETH device */
eth_device_init(&(_emac.parent), "e0");
return 0;
}
INIT_DEVICE_EXPORT(imx_emac_hw_init);
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