// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Hisilicon Fast Ethernet MAC Driver
*
* Copyright (c) 2016 HiSilicon Technologies Co., Ltd.
*/
#include <linux/circ_buf.h>
#include <linux/clk.h>
#include <linux/etherdevice.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
/* MAC control register list */
#define MAC_PORTSEL 0x0200
#define MAC_PORTSEL_STAT_CPU BIT(0)
#define MAC_PORTSEL_RMII BIT(1)
#define MAC_PORTSET 0x0208
#define MAC_PORTSET_DUPLEX_FULL BIT(0)
#define MAC_PORTSET_LINKED BIT(1)
#define MAC_PORTSET_SPEED_100M BIT(2)
#define MAC_SET 0x0210
#define MAX_FRAME_SIZE 1600
#define MAX_FRAME_SIZE_MASK GENMASK(10, 0)
#define BIT_PAUSE_EN BIT(18)
#define RX_COALESCE_SET 0x0340
#define RX_COALESCED_FRAME_OFFSET 24
#define RX_COALESCED_FRAMES 8
#define RX_COALESCED_TIMER 0x74
#define QLEN_SET 0x0344
#define RX_DEPTH_OFFSET 8
#define MAX_HW_FIFO_DEPTH 64
#define HW_TX_FIFO_DEPTH 12
#define HW_RX_FIFO_DEPTH (MAX_HW_FIFO_DEPTH - HW_TX_FIFO_DEPTH)
#define IQFRM_DES 0x0354
#define RX_FRAME_LEN_MASK GENMASK(11, 0)
#define IQ_ADDR 0x0358
#define EQ_ADDR 0x0360
#define EQFRM_LEN 0x0364
#define ADDRQ_STAT 0x036C
#define TX_CNT_INUSE_MASK GENMASK(5, 0)
#define BIT_TX_READY BIT(24)
#define BIT_RX_READY BIT(25)
/* global control register list */
#define GLB_HOSTMAC_L32 0x0000
#define GLB_HOSTMAC_H16 0x0004
#define GLB_SOFT_RESET 0x0008
#define SOFT_RESET_ALL BIT(0)
#define GLB_FWCTRL 0x0010
#define FWCTRL_VLAN_ENABLE BIT(0)
#define FWCTRL_FW2CPU_ENA BIT(5)
#define FWCTRL_FWALL2CPU BIT(7)
#define GLB_MACTCTRL 0x0014
#define MACTCTRL_UNI2CPU BIT(1)
#define MACTCTRL_MULTI2CPU BIT(3)
#define MACTCTRL_BROAD2CPU BIT(5)
#define MACTCTRL_MACT_ENA BIT(7)
#define GLB_IRQ_STAT 0x0030
#define GLB_IRQ_ENA 0x0034
#define IRQ_ENA_PORT0_MASK GENMASK(7, 0)
#define IRQ_ENA_PORT0 BIT(18)
#define IRQ_ENA_ALL BIT(19)
#define GLB_IRQ_RAW 0x0038
#define IRQ_INT_RX_RDY BIT(0)
#define IRQ_INT_TX_PER_PACKET BIT(1)
#define IRQ_INT_TX_FIFO_EMPTY BIT(6)
#define IRQ_INT_MULTI_RXRDY BIT(7)
#define DEF_INT_MASK (IRQ_INT_MULTI_RXRDY | \
IRQ_INT_TX_PER_PACKET | \
IRQ_INT_TX_FIFO_EMPTY)
#define GLB_MAC_L32_BASE 0x0100
#define GLB_MAC_H16_BASE 0x0104
#define MACFLT_HI16_MASK GENMASK(15, 0)
#define BIT_MACFLT_ENA BIT(17)
#define BIT_MACFLT_FW2CPU BIT(21)
#define GLB_MAC_H16(reg) (GLB_MAC_H16_BASE + ((reg) * 0x8))
#define GLB_MAC_L32(reg) (GLB_MAC_L32_BASE + ((reg) * 0x8))
#define MAX_MAC_FILTER_NUM 8
#define MAX_UNICAST_ADDRESSES 2
#define MAX_MULTICAST_ADDRESSES (MAX_MAC_FILTER_NUM - \
MAX_UNICAST_ADDRESSES)
/* software tx and rx queue number, should be power of 2 */
#define TXQ_NUM 64
#define RXQ_NUM 128
#define FEMAC_POLL_WEIGHT 16
#define PHY_RESET_DELAYS_PROPERTY "hisilicon,phy-reset-delays-us"
enum phy_reset_delays {
PRE_DELAY,
PULSE,
POST_DELAY,
DELAYS_NUM,
};
struct hisi_femac_queue {
struct sk_buff **skb;
dma_addr_t *dma_phys;
int num;
unsigned int head;
unsigned int tail;
};
struct hisi_femac_priv {
void __iomem *port_base;
void __iomem *glb_base;
struct clk *clk;
struct reset_control *mac_rst;
struct reset_control *phy_rst;
u32 phy_reset_delays[DELAYS_NUM];
u32 link_status;
struct device *dev;
struct net_device *ndev;
struct hisi_femac_queue txq;
struct hisi_femac_queue rxq;
u32 tx_fifo_used_cnt;
struct napi_struct napi;
};
static void hisi_femac_irq_enable(struct hisi_femac_priv *priv, int irqs)
{
u32 val;
val = readl(priv->glb_base + GLB_IRQ_ENA);
writel(val | irqs, priv->glb_base + GLB_IRQ_ENA);
}
static void hisi_femac_irq_disable(struct hisi_femac_priv *priv, int irqs)
{
u32 val;
val = readl(priv->glb_base + GLB_IRQ_ENA);
writel(val & (~irqs), priv->glb_base + GLB_IRQ_ENA);
}
static void hisi_femac_tx_dma_unmap(struct hisi_femac_priv *priv,
struct sk_buff *skb, unsigned int pos)
{
dma_addr_t dma_addr;
dma_addr = priv->txq.dma_phys[pos];
dma_unmap_single(priv->dev, dma_addr, skb->len, DMA_TO_DEVICE);
}
static void hisi_femac_xmit_reclaim(struct net_device *dev)
{
struct sk_buff *skb;
struct hisi_femac_priv *priv = netdev_priv(dev);
struct hisi_femac_queue *txq = &priv->txq;
unsigned int bytes_compl = 0, pkts_compl = 0;
u32 val;
netif_tx_lock(dev);
val = readl(priv->port_base + ADDRQ_STAT) & TX_CNT_INUSE_MASK;
while (val < priv->tx_fifo_used_cnt) {
skb = txq->skb[txq->tail];
if (unlikely(!skb)) {
netdev_err(dev, "xmitq_cnt_inuse=%d, tx_fifo_used=%d\n",
val, priv->tx_fifo_used_cnt);
break;
}
hisi_femac_tx_dma_unmap(priv, skb, txq->tail);
pkts_compl++;
bytes_compl += skb->len;
dev_kfree_skb_any(skb);
priv->tx_fifo_used_cnt--;
val = readl(priv->port_base + ADDRQ_STAT) & TX_CNT_INUSE_MASK;
txq->skb[txq->tail] = NULL;
txq->tail = (txq->tail + 1) % txq->num;
}
netdev_completed_queue(dev, pkts_compl, bytes_compl);
if (unlikely(netif_queue_stopped(dev)) && pkts_compl)
netif_wake_queue(dev);
netif_tx_unlock(dev);
}
static void hisi_femac_adjust_link(struct net_device *dev)
{
struct hisi_femac_priv *priv = netdev_priv(dev);
struct phy_device *phy = dev->phydev;
u32 status = 0;
if (phy->link)
status |= MAC_PORTSET_LINKED;
if (phy->duplex == DUPLEX_FULL)
status |= MAC_PORTSET_DUPLEX_FULL;
if (phy->speed == SPEED_100)
status |= MAC_PORTSET_SPEED_100M;
if ((status != priv->link_status) &&
((status | priv->link_status) & MAC_PORTSET_LINKED)) {
writel(status, priv->port_base + MAC_PORTSET);
priv->link_status = status;
phy_print_status(phy);
}
}
static void hisi_femac_rx_refill(struct hisi_femac_priv *priv)
{
struct hisi_femac_queue *rxq = &priv->rxq;
struct sk_buff *skb;
u32 pos;
u32 len = MAX_FRAME_SIZE;
dma_addr_t addr;
pos = rxq->head;
while (readl(priv->port_base + ADDRQ_STAT) & BIT_RX_READY) {
if (!CIRC_SPACE(pos, rxq->tail, rxq->num))
break;
if (unlikely(rxq->skb[pos])) {
netdev_err(priv->ndev, "err skb[%d]=%p\n",
pos, rxq->skb[pos]);
break;
}
skb = netdev_alloc_skb_ip_align(priv->ndev, len);
if (unlikely(!skb))
break;
addr = dma_map_single(priv->dev, skb->data, len,
DMA_FROM_DEVICE);
if (dma_mapping_error(priv->dev, addr)) {
dev_kfree_skb_any(skb);
break;
}
rxq->dma_phys[pos] = addr;
rxq->skb[pos] = skb;
writel(addr, priv->port_base + IQ_ADDR);
pos = (pos + 1) % rxq->num;
}
rxq->head = pos;
}
static int hisi_femac_rx(struct net_device *dev, int limit)
{
struct hisi_femac_priv *priv = netdev_priv(dev);
struct hisi_femac_queue *rxq = &priv->rxq;
struct sk_buff *skb;
dma_addr_t addr;
u32 rx_pkt_info, pos, len, rx_pkts_num = 0;
pos = rxq->tail;
while (readl(priv->glb_base + GLB_IRQ_RAW) & IRQ_INT_RX_RDY) {
rx_pkt_info = readl(priv->port_base + IQFRM_DES);
len = rx_pkt_info & RX_FRAME_LEN_MASK;
len -= ETH_FCS_LEN;
/* tell hardware we will deal with this packet */
writel(IRQ_INT_RX_RDY, priv->glb_base + GLB_IRQ_RAW);
rx_pkts_num++;
skb = rxq->skb[pos];
if (unlikely(!skb)) {
netdev_err(dev, "rx skb NULL. pos=%d\n", pos);
break;
}
rxq->skb[pos] = NULL;
addr = rxq->dma_phys[pos];
dma_unmap_single(priv->dev, addr, MAX_FRAME_SIZE,
DMA_FROM_DEVICE);
skb_put(skb, len);
if (unlikely(skb->len > MAX_FRAME_SIZE)) {
netdev_err(dev, "rcv len err, len = %d\n", skb->len);
dev->stats.rx_errors++;
dev->stats.rx_length_errors++;
dev_kfree_skb_any(skb);
goto next;
}
skb->protocol = eth_type_trans(skb, dev);
napi_gro_receive(&priv->napi, skb);
dev->stats.rx_packets++;
dev->stats.rx_bytes += len;
next:
pos = (pos + 1) % rxq->num;
if (rx_pkts_num >= limit)
break;
}
rxq->tail = pos;
hisi_femac_rx_refill(priv);
return rx_pkts_num;
}
static int hisi_femac_poll(struct napi_struct *napi, int budget)
{
struct hisi_femac_priv *priv = container_of(napi,
struct hisi_femac_priv, napi);
struct net_device *dev = priv->ndev;
int work_done = 0, task = budget;
int ints, num;
do {
hisi_femac_xmit_reclaim(dev);
num = hisi_femac_rx(dev, task);
work_done += num;
task -= num;
if (work_done >= budget)
break;
ints = readl(priv->glb_base + GLB_IRQ_RAW);
writel(ints & DEF_INT_MASK,
priv->glb_base + GLB_IRQ_RAW);
} while (ints & DEF_INT_MASK);
if (work_done < budget) {
napi_complete_done(napi, work_done);
hisi_femac_irq_enable(priv, DEF_INT_MASK &
(~IRQ_INT_TX_PER_PACKET));
}
return work_done;
}
static irqreturn_t hisi_femac_interrupt(int irq, void *dev_id)
{
int ints;
struct net_device *dev = (struct net_device *)dev_id;
struct hisi_femac_priv *priv = netdev_priv(dev);
ints = readl(priv->glb_base + GLB_IRQ_RAW);
if (likely(ints & DEF_INT_MASK)) {
writel(ints & DEF_INT_MASK,
priv->glb_base + GLB_IRQ_RAW);
hisi_femac_irq_disable(priv, DEF_INT_MASK);
napi_schedule(&priv->napi);
}
return IRQ_HANDLED;
}
static int hisi_femac_init_queue(struct device *dev,
struct hisi_femac_queue *queue,
unsigned int num)
{
queue->skb = devm_kcalloc(dev, num, sizeof(struct sk_buff *),
GFP_KERNEL);
if (!queue->skb)
return -ENOMEM;
queue->dma_phys = devm_kcalloc(dev, num, sizeof(dma_addr_t),
GFP_KERNEL);
if (!queue->dma_phys)
return -ENOMEM;
queue->num = num;
queue->head = 0;
queue->tail = 0;
return 0;
}
static int hisi_femac_init_tx_and_rx_queues(struct hisi_femac_priv *priv)
{
int ret;
ret = hisi_femac_init_queue(priv->dev, &priv->txq, TXQ_NUM);
if (ret)
return ret;
ret = hisi_femac_init_queue(priv->dev, &priv->rxq, RXQ_NUM);
if (ret)
return ret;
priv->tx_fifo_used_cnt = 0;
return 0;
}
static void hisi_femac_free_skb_rings(struct hisi_femac_priv *priv)
{
struct hisi_femac_queue *txq = &priv->txq;
struct hisi_femac_queue *rxq = &priv->rxq;
struct sk_buff *skb;
dma_addr_t dma_addr;
u32 pos;
pos = rxq->tail;
while (pos != rxq->head) {
skb = rxq->skb[pos];
if (unlikely(!skb)) {
netdev_err(priv->ndev, "NULL rx skb. pos=%d, head=%d\n",
pos, rxq->head);
continue;
}
dma_addr = rxq->dma_phys[pos];
dma_unmap_single(priv->dev, dma_addr, MAX_FRAME_SIZE,
DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
rxq->skb[pos] = NULL;
pos = (pos + 1) % rxq->num;
}
rxq->tail = pos;
pos = txq->tail;
while (pos != txq->head) {
skb = txq->skb[pos];
if (unlikely(!skb)) {
netdev_err(priv->ndev, "NULL tx skb. pos=%d, head=%d\n",
pos, txq->head);
continue;
}
hisi_femac_tx_dma_unmap(priv, skb, pos);
dev_kfree_skb_any(skb);
txq->skb[pos] = NULL;
pos = (pos + 1) % txq->num;
}
txq->tail = pos;
priv->tx_fifo_used_cnt = 0;
}
static int hisi_femac_set_hw_mac_addr(struct hisi_femac_priv *priv,
const unsigned char *mac)
{
u32 reg;
reg = mac[1] | (mac[0] << 8);
writel(reg, priv->glb_base + GLB_HOSTMAC_H16);
reg = mac[5] | (mac[4] << 8) | (mac[3] << 16) | (mac[2] << 24);
writel(reg, priv->glb_base + GLB_HOSTMAC_L32);
return 0;
}
static int hisi_femac_port_reset(struct hisi_femac_priv *priv)
{
u32 val;
val = readl(priv->glb_base + GLB_SOFT_RESET);
val |= SOFT_RESET_ALL;
writel(val, priv->glb_base + GLB_SOFT_RESET);
usleep_range(500, 800);
val &= ~SOFT_RESET_ALL;
writel(val, priv->glb_base + GLB_SOFT_RESET);
return 0;
}
static int hisi_femac_net_open(struct net_device *dev)
{
struct hisi_femac_priv *priv = netdev_priv(dev);
hisi_femac_port_reset(priv);
hisi_femac_set_hw_mac_addr(priv, dev->dev_addr);
hisi_femac_rx_refill(priv);
netif_carrier_off(dev);
netdev_reset_queue(dev);
netif_start_queue(dev);
napi_enable(&priv->napi);
priv->link_status = 0;
if (dev->phydev)
phy_start(dev->phydev);
writel(IRQ_ENA_PORT0_MASK, priv->glb_base + GLB_IRQ_RAW);
hisi_femac_irq_enable(priv, IRQ_ENA_ALL | IRQ_ENA_PORT0 | DEF_INT_MASK);
return 0;
}
static int hisi_femac_net_close(struct net_device *dev)
{
struct hisi_femac_priv *priv = netdev_priv(dev);
hisi_femac_irq_disable(priv, IRQ_ENA_PORT0);
if (dev->phydev)
phy_stop(dev->phydev);
netif_stop_queue(dev);
napi_disable(&priv->napi);
hisi_femac_free_skb_rings(priv);
return 0;
}
static netdev_tx_t hisi_femac_net_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct hisi_femac_priv *priv = netdev_priv(dev);
struct hisi_femac_queue *txq = &priv->txq;
dma_addr_t addr;
u32 val;
val = readl(priv->port_base + ADDRQ_STAT);
val &= BIT_TX_READY;
if (!val) {
hisi_femac_irq_enable(priv, IRQ_INT_TX_PER_PACKET);
dev->stats.tx_dropped++;
dev->stats.tx_fifo_errors++;
netif_stop_queue(dev);
return NETDEV_TX_BUSY;
}
if (unlikely(!CIRC_SPACE(txq->head, txq->tail,
txq->num))) {
hisi_femac_irq_enable(priv, IRQ_INT_TX_PER_PACKET);
dev->stats.tx_dropped++;
dev->stats.tx_fifo_errors++;
netif_stop_queue(dev);
return NETDEV_TX_BUSY;
}
addr = dma_map_single(priv->dev, skb->data,
skb->len, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(priv->dev, addr))) {
dev_kfree_skb_any(skb);
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
txq->dma_phys[txq->head] = addr;
txq->skb[txq->head] = skb;
txq->head = (txq->head + 1) % txq->num;
writel(addr, priv->port_base + EQ_ADDR);
writel(skb->len + ETH_FCS_LEN, priv->port_base + EQFRM_LEN);
priv->tx_fifo_used_cnt++;
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
netdev_sent_queue(dev, skb->len);
return NETDEV_TX_OK;
}
static int hisi_femac_set_mac_address(struct net_device *dev, void *p)
{
struct hisi_femac_priv *priv = netdev_priv(dev);
struct sockaddr *skaddr = p;
if (!is_valid_ether_addr(skaddr->sa_data))
return -EADDRNOTAVAIL;
eth_hw_addr_set(dev, skaddr->sa_data);
dev->addr_assign_type &= ~NET_ADDR_RANDOM;
hisi_femac_set_hw_mac_addr(priv, dev->dev_addr);
return 0;
}
static void hisi_femac_enable_hw_addr_filter(struct hisi_femac_priv *priv,
unsigned int reg_n, bool enable)
{
u32 val;
val = readl(priv->glb_base + GLB_MAC_H16(reg_n));
if (enable)
val |= BIT_MACFLT_ENA;
else
val &= ~BIT_MACFLT_ENA;
writel(val, priv->glb_base + GLB_MAC_H16(reg_n));
}
static void hisi_femac_set_hw_addr_filter(struct hisi_femac_priv *priv,
unsigned char *addr,
unsigned int reg_n)
{
unsigned int high, low;
u32 val;
high = GLB_MAC_H16(reg_n);
low = GLB_MAC_L32(reg_n);
val = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
writel(val, priv->glb_base + low);
val = readl(priv->glb_base + high);
val &= ~MACFLT_HI16_MASK;
val |= ((addr[0] << 8) | addr[1]);
val |= (BIT_MACFLT_ENA | BIT_MACFLT_FW2CPU);
writel(val, priv->glb_base + high);
}
static void hisi_femac_set_promisc_mode(struct hisi_femac_priv *priv,
bool promisc_mode)
{
u32 val;
val = readl(priv->glb_base + GLB_FWCTRL);
if (promisc_mode)
val |= FWCTRL_FWALL2CPU;
else
val &= ~FWCTRL_FWALL2CPU;
writel(val, priv->glb_base + GLB_FWCTRL);
}
/* Handle multiple multicast addresses (perfect filtering)*/
static void hisi_femac_set_mc_addr_filter(struct hisi_femac_priv *priv)
{
struct net_device *dev = priv->ndev;
u32 val;
val = readl(priv->glb_base + GLB_MACTCTRL);
if ((netdev_mc_count(dev) > MAX_MULTICAST_ADDRESSES) ||
(dev->flags & IFF_ALLMULTI)) {
val |= MACTCTRL_MULTI2CPU;
} else {
int reg = MAX_UNICAST_ADDRESSES;
int i;
struct netdev_hw_addr *ha;
for (i = reg; i < MAX_MAC_FILTER_NUM; i++)
hisi_femac_enable_hw_addr_filter(priv, i, false);
netdev_for_each_mc_addr(ha, dev) {
hisi_femac_set_hw_addr_filter(priv, ha->addr, reg);
reg++;
}
val &= ~MACTCTRL_MULTI2CPU;
}
writel(val, priv->glb_base + GLB_MACTCTRL);
}
/* Handle multiple unicast addresses (perfect filtering)*/
static void hisi_femac_set_uc_addr_filter(struct hisi_femac_priv *priv)
{
struct net_device *dev = priv->ndev;
u32 val;
val = readl(priv->glb_base + GLB_MACTCTRL);
if (netdev_uc_count(dev) > MAX_UNICAST_ADDRESSES) {
val |= MACTCTRL_UNI2CPU;
} else {
int reg = 0;
int i;
struct netdev_hw_addr *ha;
for (i = reg; i < MAX_UNICAST_ADDRESSES; i++)
hisi_femac_enable_hw_addr_filter(priv, i, false);
netdev_for_each_uc_addr(ha, dev) {
hisi_femac_set_hw_addr_filter(priv, ha->addr, reg);
reg++;
}
val &= ~MACTCTRL_UNI2CPU;
}
writel(val, priv->glb_base + GLB_MACTCTRL);
}
static void hisi_femac_net_set_rx_mode(struct net_device *dev)
{
struct hisi_femac_priv *priv = netdev_priv(dev);
if (dev->flags & IFF_PROMISC) {
hisi_femac_set_promisc_mode(priv, true);
} else {
hisi_femac_set_promisc_mode(priv, false);
hisi_femac_set_mc_addr_filter(priv);
hisi_femac_set_uc_addr_filter(priv);
}
}
static const struct ethtool_ops hisi_femac_ethtools_ops = {
.get_link = ethtool_op_get_link,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings,
};
static const struct net_device_ops hisi_femac_netdev_ops = {
.ndo_open = hisi_femac_net_open,
.ndo_stop = hisi_femac_net_close,
.ndo_start_xmit = hisi_femac_net_xmit,
.ndo_eth_ioctl = phy_do_ioctl_running,
.ndo_set_mac_address = hisi_femac_set_mac_address,
.ndo_set_rx_mode = hisi_femac_net_set_rx_mode,
};
static void hisi_femac_core_reset(struct hisi_femac_priv *priv)
{
reset_control_assert(priv->mac_rst);
reset_control_deassert(priv->mac_rst);
}
static void hisi_femac_sleep_us(u32 time_us)
{
u32 time_ms;
if (!time_us)
return;
time_ms = DIV_ROUND_UP(time_us, 1000);
if (time_ms < 20)
usleep_range(time_us, time_us + 500);
else
msleep(time_ms);
}
static void hisi_femac_phy_reset(struct hisi_femac_priv *priv)
{
/* To make sure PHY hardware reset success,
* we must keep PHY in deassert state first and
* then complete the hardware reset operation
*/
reset_control_deassert(priv->phy_rst);
hisi_femac_sleep_us(priv->phy_reset_delays[PRE_DELAY]);
reset_control_assert(priv->phy_rst);
/* delay some time to ensure reset ok,
* this depends on PHY hardware feature
*/
hisi_femac_sleep_us(priv->phy_reset_delays[PULSE]);
reset_control_deassert(priv->phy_rst);
/* delay some time to ensure later MDIO access */
hisi_femac_sleep_us(priv->phy_reset_delays[POST_DELAY]);
}
static void hisi_femac_port_init(struct hisi_femac_priv *priv)
{
u32 val;
/* MAC gets link status info and phy mode by software config */
val = MAC_PORTSEL_STAT_CPU;
if (priv->ndev->phydev->interface == PHY_INTERFACE_MODE_RMII)
val |= MAC_PORTSEL_RMII;
writel(val, priv->port_base + MAC_PORTSEL);
/*clear all interrupt status */
writel(IRQ_ENA_PORT0_MASK, priv->glb_base + GLB_IRQ_RAW);
hisi_femac_irq_disable(priv, IRQ_ENA_PORT0_MASK | IRQ_ENA_PORT0);
val = readl(priv->glb_base + GLB_FWCTRL);
val &= ~(FWCTRL_VLAN_ENABLE | FWCTRL_FWALL2CPU);
val |= FWCTRL_FW2CPU_ENA;
writel(val, priv->glb_base + GLB_FWCTRL);
val = readl(priv->glb_base + GLB_MACTCTRL);
val |= (MACTCTRL_BROAD2CPU | MACTCTRL_MACT_ENA);
writel(val, priv->glb_base + GLB_MACTCTRL);
val = readl(priv->port_base + MAC_SET);
val &= ~MAX_FRAME_SIZE_MASK;
val |= MAX_FRAME_SIZE;
writel(val, priv->port_base + MAC_SET);
val = RX_COALESCED_TIMER |
(RX_COALESCED_FRAMES << RX_COALESCED_FRAME_OFFSET);
writel(val, priv->port_base + RX_COALESCE_SET);
val = (HW_RX_FIFO_DEPTH << RX_DEPTH_OFFSET) | HW_TX_FIFO_DEPTH;
writel(val, priv->port_base + QLEN_SET);
}
static int hisi_femac_drv_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct net_device *ndev;
struct hisi_femac_priv *priv;
struct phy_device *phy;
int ret;
ndev = alloc_etherdev(sizeof(*priv));
if (!ndev)
return -ENOMEM;
platform_set_drvdata(pdev, ndev);
SET_NETDEV_DEV(ndev, &pdev->dev);
priv = netdev_priv(ndev);
priv->dev = dev;
priv->ndev = ndev;
priv->port_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(priv->port_base)) {
ret = PTR_ERR(priv->port_base);
goto out_free_netdev;
}
priv->glb_base = devm_platform_ioremap_resource(pdev, 1);
if (IS_ERR(priv->glb_base)) {
ret = PTR_ERR(priv->glb_base);
goto out_free_netdev;
}
priv->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(priv->clk)) {
dev_err(dev, "failed to get clk\n");
ret = -ENODEV;
goto out_free_netdev;
}
ret = clk_prepare_enable(priv->clk);
if (ret) {
dev_err(dev, "failed to enable clk %d\n", ret);
goto out_free_netdev;
}
priv->mac_rst = devm_reset_control_get(dev, "mac");
if (IS_ERR(priv->mac_rst)) {
ret = PTR_ERR(priv->mac_rst);
goto out_disable_clk;
}
hisi_femac_core_reset(priv);
priv->phy_rst = devm_reset_control_get(dev, "phy");
if (IS_ERR(priv->phy_rst)) {
priv->phy_rst = NULL;
} else {
ret = of_property_read_u32_array(node,
PHY_RESET_DELAYS_PROPERTY,
priv->phy_reset_delays,
DELAYS_NUM);
if (ret)
goto out_disable_clk;
hisi_femac_phy_reset(priv);
}
phy = of_phy_get_and_connect(ndev, node, hisi_femac_adjust_link);
if (!phy) {
dev_err(dev, "connect to PHY failed!\n");
ret = -ENODEV;
goto out_disable_clk;
}
phy_attached_print(phy, "phy_id=0x%.8lx, phy_mode=%s\n",
(unsigned long)phy->phy_id,
phy_modes(phy->interface));
ret = of_get_ethdev_address(node, ndev);
if (ret) {
eth_hw_addr_random(ndev);
dev_warn(dev, "using random MAC address %pM\n",
ndev->dev_addr);
}
ndev->watchdog_timeo = 6 * HZ;
ndev->priv_flags |= IFF_UNICAST_FLT;
ndev->netdev_ops = &hisi_femac_netdev_ops;
ndev->ethtool_ops = &hisi_femac_ethtools_ops;
netif_napi_add_weight(ndev, &priv->napi, hisi_femac_poll,
FEMAC_POLL_WEIGHT);
hisi_femac_port_init(priv);
ret = hisi_femac_init_tx_and_rx_queues(priv);
if (ret)
goto out_disconnect_phy;
ndev->irq = platform_get_irq(pdev, 0);
if (ndev->irq < 0) {
ret = ndev->irq;
goto out_disconnect_phy;
}
ret = devm_request_irq(dev, ndev->irq, hisi_femac_interrupt,
IRQF_SHARED, pdev->name, ndev);
if (ret) {
dev_err(dev, "devm_request_irq %d failed!\n", ndev->irq);
goto out_disconnect_phy;
}
ret = register_netdev(ndev);
if (ret) {
dev_err(dev, "register_netdev failed!\n");
goto out_disconnect_phy;
}
return ret;
out_disconnect_phy:
netif_napi_del(&priv->napi);
phy_disconnect(phy);
out_disable_clk:
clk_disable_unprepare(priv->clk);
out_free_netdev:
free_netdev(ndev);
return ret;
}
static void hisi_femac_drv_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct hisi_femac_priv *priv = netdev_priv(ndev);
netif_napi_del(&priv->napi);
unregister_netdev(ndev);
phy_disconnect(ndev->phydev);
clk_disable_unprepare(priv->clk);
free_netdev(ndev);
}
#ifdef CONFIG_PM
static int hisi_femac_drv_suspend(struct platform_device *pdev,
pm_message_t state)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct hisi_femac_priv *priv = netdev_priv(ndev);
disable_irq(ndev->irq);
if (netif_running(ndev)) {
hisi_femac_net_close(ndev);
netif_device_detach(ndev);
}
clk_disable_unprepare(priv->clk);
return 0;
}
static int hisi_femac_drv_resume(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct hisi_femac_priv *priv = netdev_priv(ndev);
clk_prepare_enable(priv->clk);
if (priv->phy_rst)
hisi_femac_phy_reset(priv);
if (netif_running(ndev)) {
hisi_femac_port_init(priv);
hisi_femac_net_open(ndev);
netif_device_attach(ndev);
}
enable_irq(ndev->irq);
return 0;
}
#endif
static const struct of_device_id hisi_femac_match[] = {
{.compatible = "hisilicon,hisi-femac-v1",},
{.compatible = "hisilicon,hisi-femac-v2",},
{.compatible = "hisilicon,hi3516cv300-femac",},
{},
};
MODULE_DEVICE_TABLE(of, hisi_femac_match);
static struct platform_driver hisi_femac_driver = {
.driver = {
.name = "hisi-femac",
.of_match_table = hisi_femac_match,
},
.probe = hisi_femac_drv_probe,
.remove_new = hisi_femac_drv_remove,
#ifdef CONFIG_PM
.suspend = hisi_femac_drv_suspend,
.resume = hisi_femac_drv_resume,
#endif
};
module_platform_driver(hisi_femac_driver);
MODULE_DESCRIPTION("Hisilicon Fast Ethernet MAC driver");
MODULE_AUTHOR("Dongpo Li <[email protected]>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:hisi-femac");
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