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rt-thread-official/bsp/raspberry-pi/raspi4-32/driver/drv_eth.c

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/*
* Copyright (c) 2006-2020, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-10-30 bigmagic first version
*/
#include <rthw.h>
#include <stdint.h>
#include <rtthread.h>
#include <lwip/sys.h>
#include <netif/ethernetif.h>
#include "mbox.h"
#include "raspi4.h"
#include "drv_eth.h"
#define RECV_CACHE_BUF (1024)
#define SEND_DATA_NO_CACHE (0x08200000)
#define RECV_DATA_NO_CACHE (0x08400000)
#define DMA_DISC_ADDR_SIZE (4 * 1024 *1024)
#define RX_DESC_BASE (MAC_REG + GENET_RX_OFF)
#define TX_DESC_BASE (MAC_REG + GENET_TX_OFF)
#define MAX_ADDR_LEN (6)
#define upper_32_bits(n) ((rt_uint32_t)(((n) >> 16) >> 16))
#define lower_32_bits(n) ((rt_uint32_t)(n))
#define BIT(nr) (1UL << (nr))
static rt_uint32_t tx_index = 0;
static rt_uint32_t rx_index = 0;
static rt_uint32_t index_flag = 0;
static rt_uint32_t send_cache_pbuf[RECV_CACHE_BUF];
struct rt_eth_dev
{
struct eth_device parent;
rt_uint8_t dev_addr[MAX_ADDR_LEN];
char *name;
void *iobase;
int state;
int index;
struct rt_timer link_timer;
struct rt_timer rx_poll_timer;
void *priv;
};
static struct rt_eth_dev eth_dev;
static struct rt_semaphore sem_lock;
static inline rt_uint32_t read32(void *addr)
{
return (*((volatile unsigned int*)(addr)));
}
static inline void write32(void *addr, rt_uint32_t value)
{
(*((volatile unsigned int*)(addr))) = value;
}
void eth_rx_irq(void *param)
{
eth_device_ready(&eth_dev.parent);
}
/* We only support RGMII (as used on the RPi4). */
static int bcmgenet_interface_set(void)
{
int phy_mode = PHY_INTERFACE_MODE_RGMII;
switch (phy_mode) {
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_RXID:
write32(MAC_REG + SYS_PORT_CTRL,PORT_MODE_EXT_GPHY);
break;
default:
rt_kprintf("unknown phy mode: %d\n", MAC_REG);
return -1;
}
return 0;
}
static void bcmgenet_umac_reset(void)
{
rt_uint32_t reg;
reg = read32(MAC_REG + SYS_RBUF_FLUSH_CTRL);
reg |= BIT(1);
write32((MAC_REG + SYS_RBUF_FLUSH_CTRL), reg);
reg &= ~BIT(1);
write32((MAC_REG + SYS_RBUF_FLUSH_CTRL),reg);
DELAY_MICROS(10);
write32((MAC_REG + SYS_RBUF_FLUSH_CTRL),0);
DELAY_MICROS(10);
write32(MAC_REG + UMAC_CMD, 0);
write32(MAC_REG + UMAC_CMD, (CMD_SW_RESET | CMD_LCL_LOOP_EN));
DELAY_MICROS(2);
write32(MAC_REG + UMAC_CMD, 0);
/* clear tx/rx counter */
write32(MAC_REG + UMAC_MIB_CTRL, MIB_RESET_RX | MIB_RESET_TX | MIB_RESET_RUNT);
write32(MAC_REG + UMAC_MIB_CTRL, 0);
write32(MAC_REG + UMAC_MAX_FRAME_LEN, ENET_MAX_MTU_SIZE);
/* init rx registers, enable ip header optimization */
reg = read32(MAC_REG + RBUF_CTRL);
reg |= RBUF_ALIGN_2B;
write32(MAC_REG + RBUF_CTRL, reg);
write32(MAC_REG + RBUF_TBUF_SIZE_CTRL, 1);
}
static void bcmgenet_disable_dma(void)
{
rt_uint32_t tdma_reg = 0, rdma_reg = 0;
tdma_reg = read32(MAC_REG + TDMA_REG_BASE + DMA_CTRL);
tdma_reg &= ~(1UL << DMA_EN);
write32(MAC_REG + TDMA_REG_BASE + DMA_CTRL, tdma_reg);
rdma_reg = read32(MAC_REG + RDMA_REG_BASE + DMA_CTRL);
rdma_reg &= ~(1UL << DMA_EN);
write32(MAC_REG + RDMA_REG_BASE + DMA_CTRL, rdma_reg);
write32(MAC_REG + UMAC_TX_FLUSH, 1);
DELAY_MICROS(100);
write32(MAC_REG + UMAC_TX_FLUSH, 0);
}
static void bcmgenet_enable_dma(void)
{
rt_uint32_t reg = 0;
rt_uint32_t dma_ctrl = 0;
dma_ctrl = (1 << (DEFAULT_Q + DMA_RING_BUF_EN_SHIFT)) | DMA_EN;
write32(MAC_REG + TDMA_REG_BASE + DMA_CTRL, dma_ctrl);
reg = read32(MAC_REG + RDMA_REG_BASE + DMA_CTRL);
write32(MAC_REG + RDMA_REG_BASE + DMA_CTRL, dma_ctrl | reg);
}
static int bcmgenet_mdio_write(rt_uint32_t addr, rt_uint32_t reg, rt_uint32_t value)
{
int count = 10000;
rt_uint32_t val;
val = MDIO_WR | (addr << MDIO_PMD_SHIFT) |(reg << MDIO_REG_SHIFT) | (0xffff & value);
write32(MAC_REG + MDIO_CMD, val);
rt_uint32_t reg_val = read32(MAC_REG + MDIO_CMD);
reg_val = reg_val | MDIO_START_BUSY;
write32(MAC_REG + MDIO_CMD, reg_val);
while ((read32(MAC_REG + MDIO_CMD) & MDIO_START_BUSY) && (--count))
DELAY_MICROS(1);
reg_val = read32(MAC_REG + MDIO_CMD);
return reg_val & 0xffff;
}
static int bcmgenet_mdio_read(rt_uint32_t addr, rt_uint32_t reg)
{
int count = 10000;
rt_uint32_t val = 0;
rt_uint32_t reg_val = 0;
val = MDIO_RD | (addr << MDIO_PMD_SHIFT) | (reg << MDIO_REG_SHIFT);
write32(MAC_REG + MDIO_CMD, val);
reg_val = read32(MAC_REG + MDIO_CMD);
reg_val = reg_val | MDIO_START_BUSY;
write32(MAC_REG + MDIO_CMD, reg_val);
while ((read32(MAC_REG + MDIO_CMD) & MDIO_START_BUSY) && (--count))
DELAY_MICROS(1);
reg_val = read32(MAC_REG + MDIO_CMD);
return reg_val & 0xffff;
}
static int bcmgenet_gmac_write_hwaddr(void)
{
//{0xdc,0xa6,0x32,0x28,0x22,0x50};
rt_uint8_t addr[6];
rt_uint32_t reg;
bcm271x_mbox_hardware_get_mac_address(&addr[0]);
reg = addr[0] << 24 | addr[1] << 16 | addr[2] << 8 | addr[3];
write32(MAC_REG + UMAC_MAC0, reg);
reg = addr[4] << 8 | addr[5];
write32(MAC_REG + UMAC_MAC1, reg);
return 0;
}
static int get_ethernet_uid(void)
{
rt_uint32_t uid_high = 0;
rt_uint32_t uid_low = 0;
rt_uint32_t uid = 0;
uid_high = bcmgenet_mdio_read(1, BCM54213PE_PHY_IDENTIFIER_HIGH);
uid_low = bcmgenet_mdio_read(1, BCM54213PE_PHY_IDENTIFIER_LOW);
uid = (uid_high << 16 | uid_low);
if(BCM54213PE_VERSION_B1 == uid)
{
rt_kprintf("version is B1\n");
}
return uid;
}
static void bcmgenet_mdio_init(void)
{
rt_uint32_t ret = 0;
/*get ethernet uid*/
ret = get_ethernet_uid();
if(ret == 0)
{
return;
}
/* reset phy */
bcmgenet_mdio_write(1, BCM54213PE_MII_CONTROL, MII_CONTROL_PHY_RESET);
/* read control reg */
bcmgenet_mdio_read(1, BCM54213PE_MII_CONTROL);
/* reset phy again */
bcmgenet_mdio_write(1, BCM54213PE_MII_CONTROL, MII_CONTROL_PHY_RESET);
/* read control reg */
bcmgenet_mdio_read(1, BCM54213PE_MII_CONTROL);
/* read status reg */
bcmgenet_mdio_read(1, BCM54213PE_MII_STATUS);
/* read status reg */
bcmgenet_mdio_read(1, BCM54213PE_IEEE_EXTENDED_STATUS);
bcmgenet_mdio_read(1, BCM54213PE_AUTO_NEGOTIATION_ADV);
bcmgenet_mdio_read(1, BCM54213PE_MII_STATUS);
bcmgenet_mdio_read(1, BCM54213PE_CONTROL);
/* half full duplex capability */
bcmgenet_mdio_write(1, BCM54213PE_CONTROL, (CONTROL_HALF_DUPLEX_CAPABILITY | CONTROL_FULL_DUPLEX_CAPABILITY));
bcmgenet_mdio_read(1, BCM54213PE_MII_CONTROL);
/* set mii control */
bcmgenet_mdio_write(1,BCM54213PE_MII_CONTROL,(MII_CONTROL_AUTO_NEGOTIATION_ENABLED | MII_CONTROL_AUTO_NEGOTIATION_RESTART| MII_CONTROL_PHY_FULL_DUPLEX| MII_CONTROL_SPEED_SELECTION));
}
static void rx_ring_init(void)
{
write32(MAC_REG + RDMA_REG_BASE + DMA_SCB_BURST_SIZE, DMA_MAX_BURST_LENGTH);
write32(MAC_REG + RDMA_RING_REG_BASE + DMA_START_ADDR,0x0 );
write32(MAC_REG + RDMA_READ_PTR, 0x0);
write32(MAC_REG + RDMA_WRITE_PTR, 0x0);
write32(MAC_REG + RDMA_RING_REG_BASE + DMA_END_ADDR, RX_DESCS * DMA_DESC_SIZE / 4 - 1);
write32(MAC_REG + RDMA_PROD_INDEX, 0x0);
write32(MAC_REG + RDMA_CONS_INDEX, 0x0);
write32(MAC_REG + RDMA_RING_REG_BASE + DMA_RING_BUF_SIZE, (RX_DESCS << DMA_RING_SIZE_SHIFT) | RX_BUF_LENGTH);
write32(MAC_REG + RDMA_XON_XOFF_THRESH, DMA_FC_THRESH_VALUE);
write32(MAC_REG + RDMA_REG_BASE + DMA_RING_CFG,1 << DEFAULT_Q);
}
static void tx_ring_init(void)
{
write32(MAC_REG + TDMA_REG_BASE + DMA_SCB_BURST_SIZE, DMA_MAX_BURST_LENGTH);
write32(MAC_REG + TDMA_RING_REG_BASE + DMA_START_ADDR, 0x0);
write32(MAC_REG + TDMA_READ_PTR, 0x0);
write32(MAC_REG + TDMA_READ_PTR, 0x0);
write32(MAC_REG + TDMA_READ_PTR, 0x0);
write32(MAC_REG + TDMA_WRITE_PTR, 0x0);
write32(MAC_REG + TDMA_RING_REG_BASE + DMA_END_ADDR,TX_DESCS * DMA_DESC_SIZE / 4 - 1);
write32(MAC_REG + TDMA_PROD_INDEX, 0x0);
write32(MAC_REG + TDMA_CONS_INDEX, 0x0);
write32(MAC_REG + TDMA_RING_REG_BASE + DMA_MBUF_DONE_THRESH,0x1);
write32(MAC_REG + TDMA_FLOW_PERIOD,0x0);
write32(MAC_REG + TDMA_RING_REG_BASE + DMA_RING_BUF_SIZE, (TX_DESCS << DMA_RING_SIZE_SHIFT) | RX_BUF_LENGTH);
write32(MAC_REG + TDMA_REG_BASE + DMA_RING_CFG,1 << DEFAULT_Q);
}
static void rx_descs_init(void)
{
char *rxbuffs = (char *)RECV_DATA_NO_CACHE;
rt_uint32_t len_stat, i;
void *desc_base = (void *)RX_DESC_BASE;
len_stat = (RX_BUF_LENGTH << DMA_BUFLENGTH_SHIFT) | DMA_OWN;
for (i = 0; i < RX_DESCS; i++) {
write32((desc_base + i * DMA_DESC_SIZE + DMA_DESC_ADDRESS_LO), lower_32_bits((uintptr_t)&rxbuffs[i * RX_BUF_LENGTH]));
write32((desc_base + i * DMA_DESC_SIZE + DMA_DESC_ADDRESS_HI),upper_32_bits((uintptr_t)&rxbuffs[i * RX_BUF_LENGTH]));
write32((desc_base + i * DMA_DESC_SIZE + DMA_DESC_LENGTH_STATUS),len_stat);
}
}
static int phy_startup(void)
{
int count = 1000000;
while ((bcmgenet_mdio_read(1, BCM54213PE_MII_STATUS) & MII_STATUS_LINK_UP) && (--count))
DELAY_MICROS(1);
if(count > 0)
{
rt_kprintf("bcmgenet: PHY startup ok!\n");
}
else
{
rt_kprintf("bcmgenet: PHY startup err!\n");
return 1;
}
if(bcmgenet_mdio_read(1, BCM54213PE_STATUS) == 0)
{
//todo
}
else
{
rt_kprintf("bcmgenet: BCM54213PE_STATUS err!\n");
}
if(bcmgenet_mdio_read(1, BCM54213PE_CONTROL) == (CONTROL_FULL_DUPLEX_CAPABILITY| CONTROL_HALF_DUPLEX_CAPABILITY))
{
//todo
}
else
{
rt_kprintf("bcmgenet: BCM54213PE_CONTROL err!\n");
}
return 0;
}
static int bcmgenet_adjust_link(void)
{
rt_uint32_t speed;
rt_uint32_t phy_dev_speed = SPEED_100;
switch (phy_dev_speed) {
case SPEED_1000:
speed = UMAC_SPEED_1000;
break;
case SPEED_100:
speed = UMAC_SPEED_100;
break;
case SPEED_10:
speed = UMAC_SPEED_10;
break;
default:
rt_kprintf("bcmgenet: Unsupported PHY speed: %d\n", phy_dev_speed);
return -1;
}
rt_uint32_t reg1 = read32(MAC_REG + EXT_RGMII_OOB_CTRL);
//reg1 &= ~(1UL << OOB_DISABLE);
//rt_kprintf("OOB_DISABLE is %d\n", OOB_DISABLE);
reg1 |= (RGMII_LINK | RGMII_MODE_EN | ID_MODE_DIS);
write32(MAC_REG + EXT_RGMII_OOB_CTRL, reg1);
DELAY_MICROS(1000);
write32(MAC_REG + UMAC_CMD, speed << CMD_SPEED_SHIFT);
return 0;
}
static int bcmgenet_gmac_eth_start(void)
{
rt_uint32_t ret;
rt_uint32_t count = 10000;
bcmgenet_umac_reset();
bcmgenet_gmac_write_hwaddr();
/* Disable RX/TX DMA and flush TX queues */
bcmgenet_disable_dma();
rx_ring_init();
rx_descs_init();
tx_ring_init();
/* Enable RX/TX DMA */
bcmgenet_enable_dma();
/* read PHY properties over the wire from generic PHY set-up */
ret = phy_startup();
if (ret) {
rt_kprintf("bcmgenet: PHY startup failed: %d\n", ret);
return ret;
}
/* Update MAC registers based on PHY property */
ret = bcmgenet_adjust_link();
if (ret) {
rt_kprintf("bcmgenet: adjust PHY link failed: %d\n", ret);
return ret;
}
/* wait tx index clear */
while ((read32(MAC_REG + TDMA_CONS_INDEX) != 0) && (--count))
DELAY_MICROS(1);
tx_index = read32(MAC_REG + TDMA_CONS_INDEX);
write32(MAC_REG + TDMA_PROD_INDEX, tx_index);
index_flag = read32(MAC_REG + RDMA_PROD_INDEX);
rx_index = index_flag % 256;
write32(MAC_REG + RDMA_CONS_INDEX, index_flag);
write32(MAC_REG + RDMA_PROD_INDEX, index_flag);
/* Enable Rx/Tx */
rt_uint32_t rx_tx_en;
rx_tx_en = read32(MAC_REG + UMAC_CMD);
rx_tx_en |= (CMD_TX_EN | CMD_RX_EN);
write32(MAC_REG + UMAC_CMD, rx_tx_en);
return 0;
}
static rt_uint32_t prev_recv_cnt = 0;
static rt_uint32_t cur_recv_cnt = 0;
static rt_uint32_t bcmgenet_gmac_eth_recv(rt_uint8_t **packetp)
{
void* desc_base;
rt_uint32_t length = 0, addr = 0;
rt_uint32_t prod_index = read32(MAC_REG + RDMA_PROD_INDEX);
//get next
if(prod_index == index_flag)
{
cur_recv_cnt = index_flag;
//no buff
return 0;
}
else
{
if(prev_recv_cnt == prod_index)
{
return 0;
}
desc_base = RX_DESC_BASE + rx_index * DMA_DESC_SIZE;
length = read32(desc_base + DMA_DESC_LENGTH_STATUS);
length = (length >> DMA_BUFLENGTH_SHIFT) & DMA_BUFLENGTH_MASK;
addr = read32(desc_base + DMA_DESC_ADDRESS_LO);
/* To cater for the IP headepr alignment the hardware does.
* This would actually not be needed if we don't program
* RBUF_ALIGN_2B
*/
*packetp = (rt_uint8_t *)(addr + RX_BUF_OFFSET);
rx_index = rx_index + 1;
if(rx_index >= 256)
{
rx_index = 0;
}
write32(MAC_REG + RDMA_CONS_INDEX, cur_recv_cnt);
cur_recv_cnt = cur_recv_cnt + 1;
prev_recv_cnt = cur_recv_cnt;
return length;
}
}
static int bcmgenet_gmac_eth_send(void *packet, int length)
{
void* desc_base = (TX_DESC_BASE + tx_index * DMA_DESC_SIZE);
rt_uint32_t len_stat = length << DMA_BUFLENGTH_SHIFT;
rt_uint32_t prod_index, cons;
rt_uint32_t tries = 100;
prod_index = read32(MAC_REG + TDMA_PROD_INDEX);
len_stat |= 0x3F << DMA_TX_QTAG_SHIFT;
len_stat |= DMA_TX_APPEND_CRC | DMA_SOP | DMA_EOP;
write32((desc_base + DMA_DESC_ADDRESS_LO),SEND_DATA_NO_CACHE);
write32((desc_base + DMA_DESC_ADDRESS_HI),0);
write32((desc_base + DMA_DESC_LENGTH_STATUS),len_stat);
if(++tx_index>= TX_DESCS)
{
tx_index = 0;
}
prod_index++;
/* Start Transmisson */
write32(MAC_REG + TDMA_PROD_INDEX,prod_index);
do {
cons = read32(MAC_REG + TDMA_CONS_INDEX);
} while ((cons & 0xffff) < prod_index && --tries);
if (!tries)
{
return -1;
}
return 0;
}
static rt_err_t bcmgenet_eth_init(rt_device_t device)
{
struct eth_device *eth_device = (struct eth_device *)device;
RT_ASSERT(eth_device != RT_NULL);
rt_uint32_t ret = 0;
rt_uint32_t hw_reg = 0;
struct rt_eth_dev *dev = &eth_dev;
/* Read GENET HW version */
rt_uint8_t major = 0;
hw_reg = read32(MAC_REG + SYS_REV_CTRL);
major = (hw_reg >> 24) & 0x0f;
if (major != 6) {
if (major == 5)
major = 4;
else if (major == 0)
major = 1;
rt_kprintf("Uns upported GENETv%d.%d\n", major, (hw_reg >> 16) & 0x0f);
return RT_ERROR;
}
/* set interface */
ret = bcmgenet_interface_set();
if (ret)
{
return ret;
}
/* rbuf clear */
write32(MAC_REG + SYS_RBUF_FLUSH_CTRL, 0);
/* disable MAC while updating its registers */
write32(MAC_REG + UMAC_CMD, 0);
/* issue soft reset with (rg)mii loopback to ensure a stable rxclk */
write32(MAC_REG + UMAC_CMD, CMD_SW_RESET | CMD_LCL_LOOP_EN);
bcmgenet_mdio_init();
bcmgenet_gmac_write_hwaddr();
bcmgenet_gmac_write_hwaddr();
bcmgenet_gmac_eth_start();
//irq or poll
rt_timer_init(&dev->rx_poll_timer, "rx_poll_timer",
eth_rx_irq,
NULL,
1,
RT_TIMER_FLAG_PERIODIC);
rt_timer_start(&dev->rx_poll_timer);
return RT_EOK;
}
static rt_err_t bcmgenet_eth_control(rt_device_t dev, int cmd, void *args)
{
switch (cmd)
{
case NIOCTL_GADDR:
if (args) rt_memcpy(args, eth_dev.dev_addr, 6);
else return -RT_ERROR;
break;
default :
break;
}
return RT_EOK;
}
rt_err_t rt_eth_tx(rt_device_t device, struct pbuf *p)
{
rt_uint32_t sendbuf = SEND_DATA_NO_CACHE;
/* lock eth device */
rt_sem_take(&sem_lock, RT_WAITING_FOREVER);
//struct rt_eth_dev *dev = (struct rt_eth_dev *) device;
pbuf_copy_partial(p, (void *)&send_cache_pbuf[0], p->tot_len, 0);
rt_memcpy((void *)sendbuf, send_cache_pbuf, p->tot_len);
bcmgenet_gmac_eth_send((void *)sendbuf, p->tot_len);
rt_sem_release(&sem_lock);
return RT_EOK;
}
char recv_data[RX_BUF_LENGTH];
struct pbuf *rt_eth_rx(rt_device_t device)
{
int recv_len = 0;
rt_uint32_t addr_point[8];
struct pbuf *pbuf = RT_NULL;
rt_sem_take(&sem_lock, RT_WAITING_FOREVER);
recv_len = bcmgenet_gmac_eth_recv((rt_uint8_t **)&addr_point[0]);
if(recv_len > 0)
{
pbuf = pbuf_alloc(PBUF_LINK, recv_len, PBUF_RAM);
rt_memcpy(pbuf->payload, (char *)addr_point[0], recv_len);
}
rt_sem_release(&sem_lock);
return pbuf;
}
int rt_hw_eth_init(void)
{
rt_uint8_t mac_addr[6];
rt_sem_init(&sem_lock, "eth_lock", 1, RT_IPC_FLAG_FIFO);
memset(&eth_dev, 0, sizeof(eth_dev));
memset((void *)SEND_DATA_NO_CACHE, 0, sizeof(DMA_DISC_ADDR_SIZE));
memset((void *)RECV_DATA_NO_CACHE, 0, sizeof(DMA_DISC_ADDR_SIZE));
bcm271x_mbox_hardware_get_mac_address(&mac_addr[0]);
eth_dev.iobase = MAC_REG;
eth_dev.name = "e0";
eth_dev.dev_addr[0] = mac_addr[0];
eth_dev.dev_addr[1] = mac_addr[1];
eth_dev.dev_addr[2] = mac_addr[2];
eth_dev.dev_addr[3] = mac_addr[3];
eth_dev.dev_addr[4] = mac_addr[4];
eth_dev.dev_addr[5] = mac_addr[5];
eth_dev.parent.parent.type = RT_Device_Class_NetIf;
eth_dev.parent.parent.init = bcmgenet_eth_init;
eth_dev.parent.parent.open = RT_NULL;
eth_dev.parent.parent.close = RT_NULL;
eth_dev.parent.parent.read = RT_NULL;
eth_dev.parent.parent.write = RT_NULL;
eth_dev.parent.parent.control = bcmgenet_eth_control;
eth_dev.parent.parent.user_data = RT_NULL;
eth_dev.parent.eth_tx = rt_eth_tx;
eth_dev.parent.eth_rx = rt_eth_rx;
eth_device_init(&(eth_dev.parent), "e0");
eth_device_linkchange(&eth_dev.parent, RT_TRUE); //linkup the e0 for lwip to check
return 0;
}
INIT_COMPONENT_EXPORT(rt_hw_eth_init);
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