/*
* Texas Instruments Ethernet Switch Driver
*
* Copyright (C) 2012 Texas Instruments
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/timer.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/irqreturn.h>
#include <linux/interrupt.h>
#include <linux/if_ether.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/net_tstamp.h>
#include <linux/phy.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_net.h>
#include <linux/of_device.h>
#include <linux/if_vlan.h>
#include <linux/platform_data/cpsw.h>
#include "cpsw_ale.h"
#include "cpts.h"
#include "davinci_cpdma.h"
#define CPSW_DEBUG (NETIF_MSG_HW | NETIF_MSG_WOL | \
NETIF_MSG_DRV | NETIF_MSG_LINK | \
NETIF_MSG_IFUP | NETIF_MSG_INTR | \
NETIF_MSG_PROBE | NETIF_MSG_TIMER | \
NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | \
NETIF_MSG_TX_ERR | NETIF_MSG_TX_DONE | \
NETIF_MSG_PKTDATA | NETIF_MSG_TX_QUEUED | \
NETIF_MSG_RX_STATUS)
#define cpsw_info(priv, type, format, ...) \
do { \
if (netif_msg_##type(priv) && net_ratelimit()) \
dev_info(priv->dev, format, ## __VA_ARGS__); \
} while (0)
#define cpsw_err(priv, type, format, ...) \
do { \
if (netif_msg_##type(priv) && net_ratelimit()) \
dev_err(priv->dev, format, ## __VA_ARGS__); \
} while (0)
#define cpsw_dbg(priv, type, format, ...) \
do { \
if (netif_msg_##type(priv) && net_ratelimit()) \
dev_dbg(priv->dev, format, ## __VA_ARGS__); \
} while (0)
#define cpsw_notice(priv, type, format, ...) \
do { \
if (netif_msg_##type(priv) && net_ratelimit()) \
dev_notice(priv->dev, format, ## __VA_ARGS__); \
} while (0)
#define ALE_ALL_PORTS 0x7
#define CPSW_MAJOR_VERSION(reg) (reg >> 8 & 0x7)
#define CPSW_MINOR_VERSION(reg) (reg & 0xff)
#define CPSW_RTL_VERSION(reg) ((reg >> 11) & 0x1f)
#define CPSW_VERSION_1 0x19010a
#define CPSW_VERSION_2 0x19010c
#define HOST_PORT_NUM 0
#define SLIVER_SIZE 0x40
#define CPSW1_HOST_PORT_OFFSET 0x028
#define CPSW1_SLAVE_OFFSET 0x050
#define CPSW1_SLAVE_SIZE 0x040
#define CPSW1_CPDMA_OFFSET 0x100
#define CPSW1_STATERAM_OFFSET 0x200
#define CPSW1_CPTS_OFFSET 0x500
#define CPSW1_ALE_OFFSET 0x600
#define CPSW1_SLIVER_OFFSET 0x700
#define CPSW2_HOST_PORT_OFFSET 0x108
#define CPSW2_SLAVE_OFFSET 0x200
#define CPSW2_SLAVE_SIZE 0x100
#define CPSW2_CPDMA_OFFSET 0x800
#define CPSW2_STATERAM_OFFSET 0xa00
#define CPSW2_CPTS_OFFSET 0xc00
#define CPSW2_ALE_OFFSET 0xd00
#define CPSW2_SLIVER_OFFSET 0xd80
#define CPSW2_BD_OFFSET 0x2000
#define CPDMA_RXTHRESH 0x0c0
#define CPDMA_RXFREE 0x0e0
#define CPDMA_TXHDP 0x00
#define CPDMA_RXHDP 0x20
#define CPDMA_TXCP 0x40
#define CPDMA_RXCP 0x60
#define CPSW_POLL_WEIGHT 64
#define CPSW_MIN_PACKET_SIZE 60
#define CPSW_MAX_PACKET_SIZE (1500 + 14 + 4 + 4)
#define RX_PRIORITY_MAPPING 0x76543210
#define TX_PRIORITY_MAPPING 0x33221100
#define CPDMA_TX_PRIORITY_MAP 0x76543210
#define CPSW_VLAN_AWARE BIT(1)
#define CPSW_ALE_VLAN_AWARE 1
#define CPSW_FIFO_NORMAL_MODE (0 << 15)
#define CPSW_FIFO_DUAL_MAC_MODE (1 << 15)
#define CPSW_FIFO_RATE_LIMIT_MODE (2 << 15)
#define CPSW_INTPACEEN (0x3f << 16)
#define CPSW_INTPRESCALE_MASK (0x7FF << 0)
#define CPSW_CMINTMAX_CNT 63
#define CPSW_CMINTMIN_CNT 2
#define CPSW_CMINTMAX_INTVL (1000 / CPSW_CMINTMIN_CNT)
#define CPSW_CMINTMIN_INTVL ((1000 / CPSW_CMINTMAX_CNT) + 1)
#define cpsw_enable_irq(priv) \
do { \
u32 i; \
for (i = 0; i < priv->num_irqs; i++) \
enable_irq(priv->irqs_table[i]); \
} while (0);
#define cpsw_disable_irq(priv) \
do { \
u32 i; \
for (i = 0; i < priv->num_irqs; i++) \
disable_irq_nosync(priv->irqs_table[i]); \
} while (0);
#define cpsw_slave_index(priv) \
((priv->data.dual_emac) ? priv->emac_port : \
priv->data.active_slave)
static int debug_level;
module_param(debug_level, int, 0);
MODULE_PARM_DESC(debug_level, "cpsw debug level (NETIF_MSG bits)");
static int ale_ageout = 10;
module_param(ale_ageout, int, 0);
MODULE_PARM_DESC(ale_ageout, "cpsw ale ageout interval (seconds)");
static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
module_param(rx_packet_max, int, 0);
MODULE_PARM_DESC(rx_packet_max, "maximum receive packet size (bytes)");
struct cpsw_wr_regs {
u32 id_ver;
u32 soft_reset;
u32 control;
u32 int_control;
u32 rx_thresh_en;
u32 rx_en;
u32 tx_en;
u32 misc_en;
u32 mem_allign1[8];
u32 rx_thresh_stat;
u32 rx_stat;
u32 tx_stat;
u32 misc_stat;
u32 mem_allign2[8];
u32 rx_imax;
u32 tx_imax;
};
struct cpsw_ss_regs {
u32 id_ver;
u32 control;
u32 soft_reset;
u32 stat_port_en;
u32 ptype;
u32 soft_idle;
u32 thru_rate;
u32 gap_thresh;
u32 tx_start_wds;
u32 flow_control;
u32 vlan_ltype;
u32 ts_ltype;
u32 dlr_ltype;
};
/* CPSW_PORT_V1 */
#define CPSW1_MAX_BLKS 0x00 /* Maximum FIFO Blocks */
#define CPSW1_BLK_CNT 0x04 /* FIFO Block Usage Count (Read Only) */
#define CPSW1_TX_IN_CTL 0x08 /* Transmit FIFO Control */
#define CPSW1_PORT_VLAN 0x0c /* VLAN Register */
#define CPSW1_TX_PRI_MAP 0x10 /* Tx Header Priority to Switch Pri Mapping */
#define CPSW1_TS_CTL 0x14 /* Time Sync Control */
#define CPSW1_TS_SEQ_LTYPE 0x18 /* Time Sync Sequence ID Offset and Msg Type */
#define CPSW1_TS_VLAN 0x1c /* Time Sync VLAN1 and VLAN2 */
/* CPSW_PORT_V2 */
#define CPSW2_CONTROL 0x00 /* Control Register */
#define CPSW2_MAX_BLKS 0x08 /* Maximum FIFO Blocks */
#define CPSW2_BLK_CNT 0x0c /* FIFO Block Usage Count (Read Only) */
#define CPSW2_TX_IN_CTL 0x10 /* Transmit FIFO Control */
#define CPSW2_PORT_VLAN 0x14 /* VLAN Register */
#define CPSW2_TX_PRI_MAP 0x18 /* Tx Header Priority to Switch Pri Mapping */
#define CPSW2_TS_SEQ_MTYPE 0x1c /* Time Sync Sequence ID Offset and Msg Type */
/* CPSW_PORT_V1 and V2 */
#define SA_LO 0x20 /* CPGMAC_SL Source Address Low */
#define SA_HI 0x24 /* CPGMAC_SL Source Address High */
#define SEND_PERCENT 0x28 /* Transmit Queue Send Percentages */
/* CPSW_PORT_V2 only */
#define RX_DSCP_PRI_MAP0 0x30 /* Rx DSCP Priority to Rx Packet Mapping */
#define RX_DSCP_PRI_MAP1 0x34 /* Rx DSCP Priority to Rx Packet Mapping */
#define RX_DSCP_PRI_MAP2 0x38 /* Rx DSCP Priority to Rx Packet Mapping */
#define RX_DSCP_PRI_MAP3 0x3c /* Rx DSCP Priority to Rx Packet Mapping */
#define RX_DSCP_PRI_MAP4 0x40 /* Rx DSCP Priority to Rx Packet Mapping */
#define RX_DSCP_PRI_MAP5 0x44 /* Rx DSCP Priority to Rx Packet Mapping */
#define RX_DSCP_PRI_MAP6 0x48 /* Rx DSCP Priority to Rx Packet Mapping */
#define RX_DSCP_PRI_MAP7 0x4c /* Rx DSCP Priority to Rx Packet Mapping */
/* Bit definitions for the CPSW2_CONTROL register */
#define PASS_PRI_TAGGED (1<<24) /* Pass Priority Tagged */
#define VLAN_LTYPE2_EN (1<<21) /* VLAN LTYPE 2 enable */
#define VLAN_LTYPE1_EN (1<<20) /* VLAN LTYPE 1 enable */
#define DSCP_PRI_EN (1<<16) /* DSCP Priority Enable */
#define TS_320 (1<<14) /* Time Sync Dest Port 320 enable */
#define TS_319 (1<<13) /* Time Sync Dest Port 319 enable */
#define TS_132 (1<<12) /* Time Sync Dest IP Addr 132 enable */
#define TS_131 (1<<11) /* Time Sync Dest IP Addr 131 enable */
#define TS_130 (1<<10) /* Time Sync Dest IP Addr 130 enable */
#define TS_129 (1<<9) /* Time Sync Dest IP Addr 129 enable */
#define TS_BIT8 (1<<8) /* ts_ttl_nonzero? */
#define TS_ANNEX_D_EN (1<<4) /* Time Sync Annex D enable */
#define TS_LTYPE2_EN (1<<3) /* Time Sync LTYPE 2 enable */
#define TS_LTYPE1_EN (1<<2) /* Time Sync LTYPE 1 enable */
#define TS_TX_EN (1<<1) /* Time Sync Transmit Enable */
#define TS_RX_EN (1<<0) /* Time Sync Receive Enable */
#define CTRL_TS_BITS \
(TS_320 | TS_319 | TS_132 | TS_131 | TS_130 | TS_129 | TS_BIT8 | \
TS_ANNEX_D_EN | TS_LTYPE1_EN)
#define CTRL_ALL_TS_MASK (CTRL_TS_BITS | TS_TX_EN | TS_RX_EN)
#define CTRL_TX_TS_BITS (CTRL_TS_BITS | TS_TX_EN)
#define CTRL_RX_TS_BITS (CTRL_TS_BITS | TS_RX_EN)
/* Bit definitions for the CPSW2_TS_SEQ_MTYPE register */
#define TS_SEQ_ID_OFFSET_SHIFT (16) /* Time Sync Sequence ID Offset */
#define TS_SEQ_ID_OFFSET_MASK (0x3f)
#define TS_MSG_TYPE_EN_SHIFT (0) /* Time Sync Message Type Enable */
#define TS_MSG_TYPE_EN_MASK (0xffff)
/* The PTP event messages - Sync, Delay_Req, Pdelay_Req, and Pdelay_Resp. */
#define EVENT_MSG_BITS ((1<<0) | (1<<1) | (1<<2) | (1<<3))
/* Bit definitions for the CPSW1_TS_CTL register */
#define CPSW_V1_TS_RX_EN BIT(0)
#define CPSW_V1_TS_TX_EN BIT(4)
#define CPSW_V1_MSG_TYPE_OFS 16
/* Bit definitions for the CPSW1_TS_SEQ_LTYPE register */
#define CPSW_V1_SEQ_ID_OFS_SHIFT 16
struct cpsw_host_regs {
u32 max_blks;
u32 blk_cnt;
u32 tx_in_ctl;
u32 port_vlan;
u32 tx_pri_map;
u32 cpdma_tx_pri_map;
u32 cpdma_rx_chan_map;
};
struct cpsw_sliver_regs {
u32 id_ver;
u32 mac_control;
u32 mac_status;
u32 soft_reset;
u32 rx_maxlen;
u32 __reserved_0;
u32 rx_pause;
u32 tx_pause;
u32 __reserved_1;
u32 rx_pri_map;
};
struct cpsw_slave {
void __iomem *regs;
struct cpsw_sliver_regs __iomem *sliver;
int slave_num;
u32 mac_control;
struct cpsw_slave_data *data;
struct phy_device *phy;
struct net_device *ndev;
u32 port_vlan;
u32 open_stat;
};
static inline u32 slave_read(struct cpsw_slave *slave, u32 offset)
{
return __raw_readl(slave->regs + offset);
}
static inline void slave_write(struct cpsw_slave *slave, u32 val, u32 offset)
{
__raw_writel(val, slave->regs + offset);
}
struct cpsw_priv {
spinlock_t lock;
struct platform_device *pdev;
struct net_device *ndev;
struct resource *cpsw_res;
struct resource *cpsw_wr_res;
struct napi_struct napi;
struct device *dev;
struct cpsw_platform_data data;
struct cpsw_ss_regs __iomem *regs;
struct cpsw_wr_regs __iomem *wr_regs;
struct cpsw_host_regs __iomem *host_port_regs;
u32 msg_enable;
u32 version;
u32 coal_intvl;
u32 bus_freq_mhz;
struct net_device_stats stats;
int rx_packet_max;
int host_port;
struct clk *clk;
u8 mac_addr[ETH_ALEN];
struct cpsw_slave *slaves;
struct cpdma_ctlr *dma;
struct cpdma_chan *txch, *rxch;
struct cpsw_ale *ale;
/* snapshot of IRQ numbers */
u32 irqs_table[4];
u32 num_irqs;
struct cpts *cpts;
u32 emac_port;
};
#define napi_to_priv(napi) container_of(napi, struct cpsw_priv, napi)
#define for_each_slave(priv, func, arg...) \
do { \
int idx; \
if (priv->data.dual_emac) \
(func)((priv)->slaves + priv->emac_port, ##arg);\
else \
for (idx = 0; idx < (priv)->data.slaves; idx++) \
(func)((priv)->slaves + idx, ##arg); \
} while (0)
#define cpsw_get_slave_ndev(priv, __slave_no__) \
(priv->slaves[__slave_no__].ndev)
#define cpsw_get_slave_priv(priv, __slave_no__) \
((priv->slaves[__slave_no__].ndev) ? \
netdev_priv(priv->slaves[__slave_no__].ndev) : NULL) \
#define cpsw_dual_emac_src_port_detect(status, priv, ndev, skb) \
do { \
if (!priv->data.dual_emac) \
break; \
if (CPDMA_RX_SOURCE_PORT(status) == 1) { \
ndev = cpsw_get_slave_ndev(priv, 0); \
priv = netdev_priv(ndev); \
skb->dev = ndev; \
} else if (CPDMA_RX_SOURCE_PORT(status) == 2) { \
ndev = cpsw_get_slave_ndev(priv, 1); \
priv = netdev_priv(ndev); \
skb->dev = ndev; \
} \
} while (0)
#define cpsw_add_mcast(priv, addr) \
do { \
if (priv->data.dual_emac) { \
struct cpsw_slave *slave = priv->slaves + \
priv->emac_port; \
int slave_port = cpsw_get_slave_port(priv, \
slave->slave_num); \
cpsw_ale_add_mcast(priv->ale, addr, \
1 << slave_port | 1 << priv->host_port, \
ALE_VLAN, slave->port_vlan, 0); \
} else { \
cpsw_ale_add_mcast(priv->ale, addr, \
ALE_ALL_PORTS << priv->host_port, \
0, 0, 0); \
} \
} while (0)
static inline int cpsw_get_slave_port(struct cpsw_priv *priv, u32 slave_num)
{
if (priv->host_port == 0)
return slave_num + 1;
else
return slave_num;
}
static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
if (ndev->flags & IFF_PROMISC) {
/* Enable promiscuous mode */
dev_err(priv->dev, "Ignoring Promiscuous mode\n");
return;
}
/* Clear all mcast from ALE */
cpsw_ale_flush_multicast(priv->ale, ALE_ALL_PORTS << priv->host_port);
if (!netdev_mc_empty(ndev)) {
struct netdev_hw_addr *ha;
/* program multicast address list into ALE register */
netdev_for_each_mc_addr(ha, ndev) {
cpsw_add_mcast(priv, (u8 *)ha->addr);
}
}
}
static void cpsw_intr_enable(struct cpsw_priv *priv)
{
__raw_writel(0xFF, &priv->wr_regs->tx_en);
__raw_writel(0xFF, &priv->wr_regs->rx_en);
cpdma_ctlr_int_ctrl(priv->dma, true);
return;
}
static void cpsw_intr_disable(struct cpsw_priv *priv)
{
__raw_writel(0, &priv->wr_regs->tx_en);
__raw_writel(0, &priv->wr_regs->rx_en);
cpdma_ctlr_int_ctrl(priv->dma, false);
return;
}
void cpsw_tx_handler(void *token, int len, int status)
{
struct sk_buff *skb = token;
struct net_device *ndev = skb->dev;
struct cpsw_priv *priv = netdev_priv(ndev);
/* Check whether the queue is stopped due to stalled tx dma, if the
* queue is stopped then start the queue as we have free desc for tx
*/
if (unlikely(netif_queue_stopped(ndev)))
netif_start_queue(ndev);
cpts_tx_timestamp(priv->cpts, skb);
priv->stats.tx_packets++;
priv->stats.tx_bytes += len;
dev_kfree_skb_any(skb);
}
void cpsw_rx_handler(void *token, int len, int status)
{
struct sk_buff *skb = token;
struct net_device *ndev = skb->dev;
struct cpsw_priv *priv = netdev_priv(ndev);
int ret = 0;
cpsw_dual_emac_src_port_detect(status, priv, ndev, skb);
/* free and bail if we are shutting down */
if (unlikely(!netif_running(ndev)) ||
unlikely(!netif_carrier_ok(ndev))) {
dev_kfree_skb_any(skb);
return;
}
if (likely(status >= 0)) {
skb_put(skb, len);
cpts_rx_timestamp(priv->cpts, skb);
skb->protocol = eth_type_trans(skb, ndev);
netif_receive_skb(skb);
priv->stats.rx_bytes += len;
priv->stats.rx_packets++;
skb = NULL;
}
if (unlikely(!netif_running(ndev))) {
if (skb)
dev_kfree_skb_any(skb);
return;
}
if (likely(!skb)) {
skb = netdev_alloc_skb_ip_align(ndev, priv->rx_packet_max);
if (WARN_ON(!skb))
return;
ret = cpdma_chan_submit(priv->rxch, skb, skb->data,
skb_tailroom(skb), 0, GFP_KERNEL);
}
WARN_ON(ret < 0);
}
static irqreturn_t cpsw_interrupt(int irq, void *dev_id)
{
struct cpsw_priv *priv = dev_id;
if (likely(netif_running(priv->ndev))) {
cpsw_intr_disable(priv);
cpsw_disable_irq(priv);
napi_schedule(&priv->napi);
} else {
priv = cpsw_get_slave_priv(priv, 1);
if (likely(priv) && likely(netif_running(priv->ndev))) {
cpsw_intr_disable(priv);
cpsw_disable_irq(priv);
napi_schedule(&priv->napi);
}
}
return IRQ_HANDLED;
}
static int cpsw_poll(struct napi_struct *napi, int budget)
{
struct cpsw_priv *priv = napi_to_priv(napi);
int num_tx, num_rx;
num_tx = cpdma_chan_process(priv->txch, 128);
if (num_tx)
cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_TX);
num_rx = cpdma_chan_process(priv->rxch, budget);
if (num_rx < budget) {
napi_complete(napi);
cpsw_intr_enable(priv);
cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_RX);
cpsw_enable_irq(priv);
}
if (num_rx || num_tx)
cpsw_dbg(priv, intr, "poll %d rx, %d tx pkts\n",
num_rx, num_tx);
return num_rx;
}
static inline void soft_reset(const char *module, void __iomem *reg)
{
unsigned long timeout = jiffies + HZ;
__raw_writel(1, reg);
do {
cpu_relax();
} while ((__raw_readl(reg) & 1) && time_after(timeout, jiffies));
WARN(__raw_readl(reg) & 1, "failed to soft-reset %s\n", module);
}
#define mac_hi(mac) (((mac)[0] << 0) | ((mac)[1] << 8) | \
((mac)[2] << 16) | ((mac)[3] << 24))
#define mac_lo(mac) (((mac)[4] << 0) | ((mac)[5] << 8))
static void cpsw_set_slave_mac(struct cpsw_slave *slave,
struct cpsw_priv *priv)
{
slave_write(slave, mac_hi(priv->mac_addr), SA_HI);
slave_write(slave, mac_lo(priv->mac_addr), SA_LO);
}
static void _cpsw_adjust_link(struct cpsw_slave *slave,
struct cpsw_priv *priv, bool *link)
{
struct phy_device *phy = slave->phy;
u32 mac_control = 0;
u32 slave_port;
if (!phy)
return;
slave_port = cpsw_get_slave_port(priv, slave->slave_num);
if (phy->link) {
mac_control = priv->data.mac_control;
/* enable forwarding */
cpsw_ale_control_set(priv->ale, slave_port,
ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
if (phy->speed == 1000)
mac_control |= BIT(7); /* GIGABITEN */
if (phy->duplex)
mac_control |= BIT(0); /* FULLDUPLEXEN */
/* set speed_in input in case RMII mode is used in 100Mbps */
if (phy->speed == 100)
mac_control |= BIT(15);
*link = true;
} else {
mac_control = 0;
/* disable forwarding */
cpsw_ale_control_set(priv->ale, slave_port,
ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
}
if (mac_control != slave->mac_control) {
phy_print_status(phy);
__raw_writel(mac_control, &slave->sliver->mac_control);
}
slave->mac_control = mac_control;
}
static void cpsw_adjust_link(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
bool link = false;
for_each_slave(priv, _cpsw_adjust_link, priv, &link);
if (link) {
netif_carrier_on(ndev);
if (netif_running(ndev))
netif_wake_queue(ndev);
} else {
netif_carrier_off(ndev);
netif_stop_queue(ndev);
}
}
static int cpsw_get_coalesce(struct net_device *ndev,
struct ethtool_coalesce *coal)
{
struct cpsw_priv *priv = netdev_priv(ndev);
coal->rx_coalesce_usecs = priv->coal_intvl;
return 0;
}
static int cpsw_set_coalesce(struct net_device *ndev,
struct ethtool_coalesce *coal)
{
struct cpsw_priv *priv = netdev_priv(ndev);
u32 int_ctrl;
u32 num_interrupts = 0;
u32 prescale = 0;
u32 addnl_dvdr = 1;
u32 coal_intvl = 0;
if (!coal->rx_coalesce_usecs)
return -EINVAL;
coal_intvl = coal->rx_coalesce_usecs;
int_ctrl = readl(&priv->wr_regs->int_control);
prescale = priv->bus_freq_mhz * 4;
if (coal_intvl < CPSW_CMINTMIN_INTVL)
coal_intvl = CPSW_CMINTMIN_INTVL;
if (coal_intvl > CPSW_CMINTMAX_INTVL) {
/* Interrupt pacer works with 4us Pulse, we can
* throttle further by dilating the 4us pulse.
*/
addnl_dvdr = CPSW_INTPRESCALE_MASK / prescale;
if (addnl_dvdr > 1) {
prescale *= addnl_dvdr;
if (coal_intvl > (CPSW_CMINTMAX_INTVL * addnl_dvdr))
coal_intvl = (CPSW_CMINTMAX_INTVL
* addnl_dvdr);
} else {
addnl_dvdr = 1;
coal_intvl = CPSW_CMINTMAX_INTVL;
}
}
num_interrupts = (1000 * addnl_dvdr) / coal_intvl;
writel(num_interrupts, &priv->wr_regs->rx_imax);
writel(num_interrupts, &priv->wr_regs->tx_imax);
int_ctrl |= CPSW_INTPACEEN;
int_ctrl &= (~CPSW_INTPRESCALE_MASK);
int_ctrl |= (prescale & CPSW_INTPRESCALE_MASK);
writel(int_ctrl, &priv->wr_regs->int_control);
cpsw_notice(priv, timer, "Set coalesce to %d usecs.\n", coal_intvl);
if (priv->data.dual_emac) {
int i;
for (i = 0; i < priv->data.slaves; i++) {
priv = netdev_priv(priv->slaves[i].ndev);
priv->coal_intvl = coal_intvl;
}
} else {
priv->coal_intvl = coal_intvl;
}
return 0;
}
static inline int __show_stat(char *buf, int maxlen, const char *name, u32 val)
{
static char *leader = "........................................";
if (!val)
return 0;
else
return snprintf(buf, maxlen, "%s %s %10d\n", name,
leader + strlen(name), val);
}
static int cpsw_common_res_usage_state(struct cpsw_priv *priv)
{
u32 i;
u32 usage_count = 0;
if (!priv->data.dual_emac)
return 0;
for (i = 0; i < priv->data.slaves; i++)
if (priv->slaves[i].open_stat)
usage_count++;
return usage_count;
}
static inline int cpsw_tx_packet_submit(struct net_device *ndev,
struct cpsw_priv *priv, struct sk_buff *skb)
{
if (!priv->data.dual_emac)
return cpdma_chan_submit(priv->txch, skb, skb->data,
skb->len, 0, GFP_KERNEL);
if (ndev == cpsw_get_slave_ndev(priv, 0))
return cpdma_chan_submit(priv->txch, skb, skb->data,
skb->len, 1, GFP_KERNEL);
else
return cpdma_chan_submit(priv->txch, skb, skb->data,
skb->len, 2, GFP_KERNEL);
}
static inline void cpsw_add_dual_emac_def_ale_entries(
struct cpsw_priv *priv, struct cpsw_slave *slave,
u32 slave_port)
{
u32 port_mask = 1 << slave_port | 1 << priv->host_port;
if (priv->version == CPSW_VERSION_1)
slave_write(slave, slave->port_vlan, CPSW1_PORT_VLAN);
else
slave_write(slave, slave->port_vlan, CPSW2_PORT_VLAN);
cpsw_ale_add_vlan(priv->ale, slave->port_vlan, port_mask,
port_mask, port_mask, 0);
cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
port_mask, ALE_VLAN, slave->port_vlan, 0);
cpsw_ale_add_ucast(priv->ale, priv->mac_addr,
priv->host_port, ALE_VLAN, slave->port_vlan);
}
static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
{
char name[32];
u32 slave_port;
sprintf(name, "slave-%d", slave->slave_num);
soft_reset(name, &slave->sliver->soft_reset);
/* setup priority mapping */
__raw_writel(RX_PRIORITY_MAPPING, &slave->sliver->rx_pri_map);
switch (priv->version) {
case CPSW_VERSION_1:
slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
break;
case CPSW_VERSION_2:
slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
break;
}
/* setup max packet size, and mac address */
__raw_writel(priv->rx_packet_max, &slave->sliver->rx_maxlen);
cpsw_set_slave_mac(slave, priv);
slave->mac_control = 0; /* no link yet */
slave_port = cpsw_get_slave_port(priv, slave->slave_num);
if (priv->data.dual_emac)
cpsw_add_dual_emac_def_ale_entries(priv, slave, slave_port);
else
cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
1 << slave_port, 0, 0, ALE_MCAST_FWD_2);
slave->phy = phy_connect(priv->ndev, slave->data->phy_id,
&cpsw_adjust_link, slave->data->phy_if);
if (IS_ERR(slave->phy)) {
dev_err(priv->dev, "phy %s not found on slave %d\n",
slave->data->phy_id, slave->slave_num);
slave->phy = NULL;
} else {
dev_info(priv->dev, "phy found : id is : 0x%x\n",
slave->phy->phy_id);
phy_start(slave->phy);
}
}
static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
{
const int vlan = priv->data.default_vlan;
const int port = priv->host_port;
u32 reg;
int i;
reg = (priv->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
CPSW2_PORT_VLAN;
writel(vlan, &priv->host_port_regs->port_vlan);
for (i = 0; i < priv->data.slaves; i++)
slave_write(priv->slaves + i, vlan, reg);
cpsw_ale_add_vlan(priv->ale, vlan, ALE_ALL_PORTS << port,
ALE_ALL_PORTS << port, ALE_ALL_PORTS << port,
(ALE_PORT_1 | ALE_PORT_2) << port);
}
static void cpsw_init_host_port(struct cpsw_priv *priv)
{
u32 control_reg;
u32 fifo_mode;
/* soft reset the controller and initialize ale */
soft_reset("cpsw", &priv->regs->soft_reset);
cpsw_ale_start(priv->ale);
/* switch to vlan unaware mode */
cpsw_ale_control_set(priv->ale, priv->host_port, ALE_VLAN_AWARE,
CPSW_ALE_VLAN_AWARE);
control_reg = readl(&priv->regs->control);
control_reg |= CPSW_VLAN_AWARE;
writel(control_reg, &priv->regs->control);
fifo_mode = (priv->data.dual_emac) ? CPSW_FIFO_DUAL_MAC_MODE :
CPSW_FIFO_NORMAL_MODE;
writel(fifo_mode, &priv->host_port_regs->tx_in_ctl);
/* setup host port priority mapping */
__raw_writel(CPDMA_TX_PRIORITY_MAP,
&priv->host_port_regs->cpdma_tx_pri_map);
__raw_writel(0, &priv->host_port_regs->cpdma_rx_chan_map);
cpsw_ale_control_set(priv->ale, priv->host_port,
ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
if (!priv->data.dual_emac) {
cpsw_ale_add_ucast(priv->ale, priv->mac_addr, priv->host_port,
0, 0);
cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
1 << priv->host_port, 0, 0, ALE_MCAST_FWD_2);
}
}
static int cpsw_ndo_open(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
int i, ret;
u32 reg;
if (!cpsw_common_res_usage_state(priv))
cpsw_intr_disable(priv);
netif_carrier_off(ndev);
pm_runtime_get_sync(&priv->pdev->dev);
reg = priv->version;
dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),
CPSW_RTL_VERSION(reg));
/* initialize host and slave ports */
if (!cpsw_common_res_usage_state(priv))
cpsw_init_host_port(priv);
for_each_slave(priv, cpsw_slave_open, priv);
/* Add default VLAN */
if (!priv->data.dual_emac)
cpsw_add_default_vlan(priv);
if (!cpsw_common_res_usage_state(priv)) {
/* setup tx dma to fixed prio and zero offset */
cpdma_control_set(priv->dma, CPDMA_TX_PRIO_FIXED, 1);
cpdma_control_set(priv->dma, CPDMA_RX_BUFFER_OFFSET, 0);
/* disable priority elevation */
__raw_writel(0, &priv->regs->ptype);
/* enable statistics collection only on all ports */
__raw_writel(0x7, &priv->regs->stat_port_en);
if (WARN_ON(!priv->data.rx_descs))
priv->data.rx_descs = 128;
for (i = 0; i < priv->data.rx_descs; i++) {
struct sk_buff *skb;
ret = -ENOMEM;
skb = netdev_alloc_skb_ip_align(priv->ndev,
priv->rx_packet_max);
if (!skb)
break;
ret = cpdma_chan_submit(priv->rxch, skb, skb->data,
skb_tailroom(skb), 0, GFP_KERNEL);
if (WARN_ON(ret < 0))
break;
}
/* continue even if we didn't manage to submit all
* receive descs
*/
cpsw_info(priv, ifup, "submitted %d rx descriptors\n", i);
}
/* Enable Interrupt pacing if configured */
if (priv->coal_intvl != 0) {
struct ethtool_coalesce coal;
coal.rx_coalesce_usecs = (priv->coal_intvl << 4);
cpsw_set_coalesce(ndev, &coal);
}
cpdma_ctlr_start(priv->dma);
cpsw_intr_enable(priv);
napi_enable(&priv->napi);
cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_RX);
cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_TX);
if (priv->data.dual_emac)
priv->slaves[priv->emac_port].open_stat = true;
return 0;
}
static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_priv *priv)
{
if (!slave->phy)
return;
phy_stop(slave->phy);
phy_disconnect(slave->phy);
slave->phy = NULL;
}
static int cpsw_ndo_stop(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
cpsw_info(priv, ifdown, "shutting down cpsw device\n");
netif_stop_queue(priv->ndev);
napi_disable(&priv->napi);
netif_carrier_off(priv->ndev);
if (cpsw_common_res_usage_state(priv) <= 1) {
cpsw_intr_disable(priv);
cpdma_ctlr_int_ctrl(priv->dma, false);
cpdma_ctlr_stop(priv->dma);
cpsw_ale_stop(priv->ale);
}
for_each_slave(priv, cpsw_slave_stop, priv);
pm_runtime_put_sync(&priv->pdev->dev);
if (priv->data.dual_emac)
priv->slaves[priv->emac_port].open_stat = false;
return 0;
}
static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
int ret;
ndev->trans_start = jiffies;
if (skb_padto(skb, CPSW_MIN_PACKET_SIZE)) {
cpsw_err(priv, tx_err, "packet pad failed\n");
priv->stats.tx_dropped++;
return NETDEV_TX_OK;
}
if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
priv->cpts->tx_enable)
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
skb_tx_timestamp(skb);
ret = cpsw_tx_packet_submit(ndev, priv, skb);
if (unlikely(ret != 0)) {
cpsw_err(priv, tx_err, "desc submit failed\n");
goto fail;
}
/* If there is no more tx desc left free then we need to
* tell the kernel to stop sending us tx frames.
*/
if (unlikely(cpdma_check_free_tx_desc(priv->txch)))
netif_stop_queue(ndev);
return NETDEV_TX_OK;
fail:
priv->stats.tx_dropped++;
netif_stop_queue(ndev);
return NETDEV_TX_BUSY;
}
static void cpsw_ndo_change_rx_flags(struct net_device *ndev, int flags)
{
/*
* The switch cannot operate in promiscuous mode without substantial
* headache. For promiscuous mode to work, we would need to put the
* ALE in bypass mode and route all traffic to the host port.
* Subsequently, the host will need to operate as a "bridge", learn,
* and flood as needed. For now, we simply complain here and
* do nothing about it :-)
*/
if ((flags & IFF_PROMISC) && (ndev->flags & IFF_PROMISC))
dev_err(&ndev->dev, "promiscuity ignored!\n");
/*
* The switch cannot filter multicast traffic unless it is configured
* in "VLAN Aware" mode. Unfortunately, VLAN awareness requires a
* whole bunch of additional logic that this driver does not implement
* at present.
*/
if ((flags & IFF_ALLMULTI) && !(ndev->flags & IFF_ALLMULTI))
dev_err(&ndev->dev, "multicast traffic cannot be filtered!\n");
}
#ifdef CONFIG_TI_CPTS
static void cpsw_hwtstamp_v1(struct cpsw_priv *priv)
{
struct cpsw_slave *slave = &priv->slaves[priv->data.active_slave];
u32 ts_en, seq_id;
if (!priv->cpts->tx_enable && !priv->cpts->rx_enable) {
slave_write(slave, 0, CPSW1_TS_CTL);
return;
}
seq_id = (30 << CPSW_V1_SEQ_ID_OFS_SHIFT) | ETH_P_1588;
ts_en = EVENT_MSG_BITS << CPSW_V1_MSG_TYPE_OFS;
if (priv->cpts->tx_enable)
ts_en |= CPSW_V1_TS_TX_EN;
if (priv->cpts->rx_enable)
ts_en |= CPSW_V1_TS_RX_EN;
slave_write(slave, ts_en, CPSW1_TS_CTL);
slave_write(slave, seq_id, CPSW1_TS_SEQ_LTYPE);
}
static void cpsw_hwtstamp_v2(struct cpsw_priv *priv)
{
struct cpsw_slave *slave;
u32 ctrl, mtype;
if (priv->data.dual_emac)
slave = &priv->slaves[priv->emac_port];
else
slave = &priv->slaves[priv->data.active_slave];
ctrl = slave_read(slave, CPSW2_CONTROL);
ctrl &= ~CTRL_ALL_TS_MASK;
if (priv->cpts->tx_enable)
ctrl |= CTRL_TX_TS_BITS;
if (priv->cpts->rx_enable)
ctrl |= CTRL_RX_TS_BITS;
mtype = (30 << TS_SEQ_ID_OFFSET_SHIFT) | EVENT_MSG_BITS;
slave_write(slave, mtype, CPSW2_TS_SEQ_MTYPE);
slave_write(slave, ctrl, CPSW2_CONTROL);
__raw_writel(ETH_P_1588, &priv->regs->ts_ltype);
}
static int cpsw_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
{
struct cpsw_priv *priv = netdev_priv(dev);
struct cpts *cpts = priv->cpts;
struct hwtstamp_config cfg;
if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
return -EFAULT;
/* reserved for future extensions */
if (cfg.flags)
return -EINVAL;
switch (cfg.tx_type) {
case HWTSTAMP_TX_OFF:
cpts->tx_enable = 0;
break;
case HWTSTAMP_TX_ON:
cpts->tx_enable = 1;
break;
default:
return -ERANGE;
}
switch (cfg.rx_filter) {
case HWTSTAMP_FILTER_NONE:
cpts->rx_enable = 0;
break;
case HWTSTAMP_FILTER_ALL:
case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
return -ERANGE;
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
cpts->rx_enable = 1;
cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
break;
default:
return -ERANGE;
}
switch (priv->version) {
case CPSW_VERSION_1:
cpsw_hwtstamp_v1(priv);
break;
case CPSW_VERSION_2:
cpsw_hwtstamp_v2(priv);
break;
default:
return -ENOTSUPP;
}
return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
}
#endif /*CONFIG_TI_CPTS*/
static int cpsw_ndo_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
{
if (!netif_running(dev))
return -EINVAL;
#ifdef CONFIG_TI_CPTS
if (cmd == SIOCSHWTSTAMP)
return cpsw_hwtstamp_ioctl(dev, req);
#endif
return -ENOTSUPP;
}
static void cpsw_ndo_tx_timeout(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
cpsw_err(priv, tx_err, "transmit timeout, restarting dma\n");
priv->stats.tx_errors++;
cpsw_intr_disable(priv);
cpdma_ctlr_int_ctrl(priv->dma, false);
cpdma_chan_stop(priv->txch);
cpdma_chan_start(priv->txch);
cpdma_ctlr_int_ctrl(priv->dma, true);
cpsw_intr_enable(priv);
cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_RX);
cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_TX);
}
static struct net_device_stats *cpsw_ndo_get_stats(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
return &priv->stats;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void cpsw_ndo_poll_controller(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
cpsw_intr_disable(priv);
cpdma_ctlr_int_ctrl(priv->dma, false);
cpsw_interrupt(ndev->irq, priv);
cpdma_ctlr_int_ctrl(priv->dma, true);
cpsw_intr_enable(priv);
cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_RX);
cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_TX);
}
#endif
static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
unsigned short vid)
{
int ret;
ret = cpsw_ale_add_vlan(priv->ale, vid,
ALE_ALL_PORTS << priv->host_port,
0, ALE_ALL_PORTS << priv->host_port,
(ALE_PORT_1 | ALE_PORT_2) << priv->host_port);
if (ret != 0)
return ret;
ret = cpsw_ale_add_ucast(priv->ale, priv->mac_addr,
priv->host_port, ALE_VLAN, vid);
if (ret != 0)
goto clean_vid;
ret = cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
ALE_ALL_PORTS << priv->host_port,
ALE_VLAN, vid, 0);
if (ret != 0)
goto clean_vlan_ucast;
return 0;
clean_vlan_ucast:
cpsw_ale_del_ucast(priv->ale, priv->mac_addr,
priv->host_port, ALE_VLAN, vid);
clean_vid:
cpsw_ale_del_vlan(priv->ale, vid, 0);
return ret;
}
static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
unsigned short vid)
{
struct cpsw_priv *priv = netdev_priv(ndev);
if (vid == priv->data.default_vlan)
return 0;
dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
return cpsw_add_vlan_ale_entry(priv, vid);
}
static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
unsigned short vid)
{
struct cpsw_priv *priv = netdev_priv(ndev);
int ret;
if (vid == priv->data.default_vlan)
return 0;
dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid);
ret = cpsw_ale_del_vlan(priv->ale, vid, 0);
if (ret != 0)
return ret;
ret = cpsw_ale_del_ucast(priv->ale, priv->mac_addr,
priv->host_port, ALE_VLAN, vid);
if (ret != 0)
return ret;
return cpsw_ale_del_mcast(priv->ale, priv->ndev->broadcast,
0, ALE_VLAN, vid);
}
static const struct net_device_ops cpsw_netdev_ops = {
.ndo_open = cpsw_ndo_open,
.ndo_stop = cpsw_ndo_stop,
.ndo_start_xmit = cpsw_ndo_start_xmit,
.ndo_change_rx_flags = cpsw_ndo_change_rx_flags,
.ndo_do_ioctl = cpsw_ndo_ioctl,
.ndo_validate_addr = eth_validate_addr,
.ndo_change_mtu = eth_change_mtu,
.ndo_tx_timeout = cpsw_ndo_tx_timeout,
.ndo_get_stats = cpsw_ndo_get_stats,
.ndo_set_rx_mode = cpsw_ndo_set_rx_mode,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = cpsw_ndo_poll_controller,
#endif
.ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid,
};
static void cpsw_get_drvinfo(struct net_device *ndev,
struct ethtool_drvinfo *info)
{
struct cpsw_priv *priv = netdev_priv(ndev);
strlcpy(info->driver, "TI CPSW Driver v1.0", sizeof(info->driver));
strlcpy(info->version, "1.0", sizeof(info->version));
strlcpy(info->bus_info, priv->pdev->name, sizeof(info->bus_info));
}
static u32 cpsw_get_msglevel(struct net_device *ndev)
{
struct cpsw_priv *priv = netdev_priv(ndev);
return priv->msg_enable;
}
static void cpsw_set_msglevel(struct net_device *ndev, u32 value)
{
struct cpsw_priv *priv = netdev_priv(ndev);
priv->msg_enable = value;
}
static int cpsw_get_ts_info(struct net_device *ndev,
struct ethtool_ts_info *info)
{
#ifdef CONFIG_TI_CPTS
struct cpsw_priv *priv = netdev_priv(ndev);
info->so_timestamping =
SOF_TIMESTAMPING_TX_HARDWARE |
SOF_TIMESTAMPING_TX_SOFTWARE |
SOF_TIMESTAMPING_RX_HARDWARE |
SOF_TIMESTAMPING_RX_SOFTWARE |
SOF_TIMESTAMPING_SOFTWARE |
SOF_TIMESTAMPING_RAW_HARDWARE;
info->phc_index = priv->cpts->phc_index;
info->tx_types =
(1 << HWTSTAMP_TX_OFF) |
(1 << HWTSTAMP_TX_ON);
info->rx_filters =
(1 << HWTSTAMP_FILTER_NONE) |
(1 << HWTSTAMP_FILTER_PTP_V2_EVENT);
#else
info->so_timestamping =
SOF_TIMESTAMPING_TX_SOFTWARE |
SOF_TIMESTAMPING_RX_SOFTWARE |
SOF_TIMESTAMPING_SOFTWARE;
info->phc_index = -1;
info->tx_types = 0;
info->rx_filters = 0;
#endif
return 0;
}
static int cpsw_get_settings(struct net_device *ndev,
struct ethtool_cmd *ecmd)
{
struct cpsw_priv *priv = netdev_priv(ndev);
int slave_no = cpsw_slave_index(priv);
if (priv->slaves[slave_no].phy)
return phy_ethtool_gset(priv->slaves[slave_no].phy, ecmd);
else
return -EOPNOTSUPP;
}
static int cpsw_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd)
{
struct cpsw_priv *priv = netdev_priv(ndev);
int slave_no = cpsw_slave_index(priv);
if (priv->slaves[slave_no].phy)
return phy_ethtool_sset(priv->slaves[slave_no].phy, ecmd);
else
return -EOPNOTSUPP;
}
static const struct ethtool_ops cpsw_ethtool_ops = {
.get_drvinfo = cpsw_get_drvinfo,
.get_msglevel = cpsw_get_msglevel,
.set_msglevel = cpsw_set_msglevel,
.get_link = ethtool_op_get_link,
.get_ts_info = cpsw_get_ts_info,
.get_settings = cpsw_get_settings,
.set_settings = cpsw_set_settings,
.get_coalesce = cpsw_get_coalesce,
.set_coalesce = cpsw_set_coalesce,
};
static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
u32 slave_reg_ofs, u32 sliver_reg_ofs)
{
void __iomem *regs = priv->regs;
int slave_num = slave->slave_num;
struct cpsw_slave_data *data = priv->data.slave_data + slave_num;
slave->data = data;
slave->regs = regs + slave_reg_ofs;
slave->sliver = regs + sliver_reg_ofs;
slave->port_vlan = data->dual_emac_res_vlan;
}
static int cpsw_probe_dt(struct cpsw_platform_data *data,
struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct device_node *slave_node;
int i = 0, ret;
u32 prop;
if (!node)
return -EINVAL;
if (of_property_read_u32(node, "slaves", &prop)) {
pr_err("Missing slaves property in the DT.\n");
return -EINVAL;
}
data->slaves = prop;
if (of_property_read_u32(node, "active_slave", &prop)) {
pr_err("Missing active_slave property in the DT.\n");
ret = -EINVAL;
goto error_ret;
}
data->active_slave = prop;
if (of_property_read_u32(node, "cpts_clock_mult", &prop)) {
pr_err("Missing cpts_clock_mult property in the DT.\n");
ret = -EINVAL;
goto error_ret;
}
data->cpts_clock_mult = prop;
if (of_property_read_u32(node, "cpts_clock_shift", &prop)) {
pr_err("Missing cpts_clock_shift property in the DT.\n");
ret = -EINVAL;
goto error_ret;
}
data->cpts_clock_shift = prop;
data->slave_data = kcalloc(data->slaves, sizeof(struct cpsw_slave_data),
GFP_KERNEL);
if (!data->slave_data)
return -EINVAL;
if (of_property_read_u32(node, "cpdma_channels", &prop)) {
pr_err("Missing cpdma_channels property in the DT.\n");
ret = -EINVAL;
goto error_ret;
}
data->channels = prop;
if (of_property_read_u32(node, "ale_entries", &prop)) {
pr_err("Missing ale_entries property in the DT.\n");
ret = -EINVAL;
goto error_ret;
}
data->ale_entries = prop;
if (of_property_read_u32(node, "bd_ram_size", &prop)) {
pr_err("Missing bd_ram_size property in the DT.\n");
ret = -EINVAL;
goto error_ret;
}
data->bd_ram_size = prop;
if (of_property_read_u32(node, "rx_descs", &prop)) {
pr_err("Missing rx_descs property in the DT.\n");
ret = -EINVAL;
goto error_ret;
}
data->rx_descs = prop;
if (of_property_read_u32(node, "mac_control", &prop)) {
pr_err("Missing mac_control property in the DT.\n");
ret = -EINVAL;
goto error_ret;
}
data->mac_control = prop;
if (!of_property_read_u32(node, "dual_emac", &prop))
data->dual_emac = prop;
/*
* Populate all the child nodes here...
*/
ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
/* We do not want to force this, as in some cases may not have child */
if (ret)
pr_warn("Doesn't have any child node\n");
for_each_node_by_name(slave_node, "slave") {
struct cpsw_slave_data *slave_data = data->slave_data + i;
const void *mac_addr = NULL;
u32 phyid;
int lenp;
const __be32 *parp;
struct device_node *mdio_node;
struct platform_device *mdio;
parp = of_get_property(slave_node, "phy_id", &lenp);
if ((parp == NULL) && (lenp != (sizeof(void *) * 2))) {
pr_err("Missing slave[%d] phy_id property\n", i);
ret = -EINVAL;
goto error_ret;
}
mdio_node = of_find_node_by_phandle(be32_to_cpup(parp));
phyid = be32_to_cpup(parp+1);
mdio = of_find_device_by_node(mdio_node);
snprintf(slave_data->phy_id, sizeof(slave_data->phy_id),
PHY_ID_FMT, mdio->name, phyid);
mac_addr = of_get_mac_address(slave_node);
if (mac_addr)
memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN);
if (data->dual_emac) {
if (of_property_read_u32(node, "dual_emac_res_vlan",
&prop)) {
pr_err("Missing dual_emac_res_vlan in DT.\n");
slave_data->dual_emac_res_vlan = i+1;
pr_err("Using %d as Reserved VLAN for %d slave\n",
slave_data->dual_emac_res_vlan, i);
} else {
slave_data->dual_emac_res_vlan = prop;
}
}
i++;
}
return 0;
error_ret:
kfree(data->slave_data);
return ret;
}
static int cpsw_probe_dual_emac(struct platform_device *pdev,
struct cpsw_priv *priv)
{
struct cpsw_platform_data *data = &priv->data;
struct net_device *ndev;
struct cpsw_priv *priv_sl2;
int ret = 0, i;
ndev = alloc_etherdev(sizeof(struct cpsw_priv));
if (!ndev) {
pr_err("cpsw: error allocating net_device\n");
return -ENOMEM;
}
priv_sl2 = netdev_priv(ndev);
spin_lock_init(&priv_sl2->lock);
priv_sl2->data = *data;
priv_sl2->pdev = pdev;
priv_sl2->ndev = ndev;
priv_sl2->dev = &ndev->dev;
priv_sl2->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
priv_sl2->rx_packet_max = max(rx_packet_max, 128);
if (is_valid_ether_addr(data->slave_data[1].mac_addr)) {
memcpy(priv_sl2->mac_addr, data->slave_data[1].mac_addr,
ETH_ALEN);
pr_info("cpsw: Detected MACID = %pM\n", priv_sl2->mac_addr);
} else {
random_ether_addr(priv_sl2->mac_addr);
pr_info("cpsw: Random MACID = %pM\n", priv_sl2->mac_addr);
}
memcpy(ndev->dev_addr, priv_sl2->mac_addr, ETH_ALEN);
priv_sl2->slaves = priv->slaves;
priv_sl2->clk = priv->clk;
priv_sl2->coal_intvl = 0;
priv_sl2->bus_freq_mhz = priv->bus_freq_mhz;
priv_sl2->cpsw_res = priv->cpsw_res;
priv_sl2->regs = priv->regs;
priv_sl2->host_port = priv->host_port;
priv_sl2->host_port_regs = priv->host_port_regs;
priv_sl2->wr_regs = priv->wr_regs;
priv_sl2->dma = priv->dma;
priv_sl2->txch = priv->txch;
priv_sl2->rxch = priv->rxch;
priv_sl2->ale = priv->ale;
priv_sl2->emac_port = 1;
priv->slaves[1].ndev = ndev;
priv_sl2->cpts = priv->cpts;
priv_sl2->version = priv->version;
for (i = 0; i < priv->num_irqs; i++) {
priv_sl2->irqs_table[i] = priv->irqs_table[i];
priv_sl2->num_irqs = priv->num_irqs;
}
ndev->features |= NETIF_F_HW_VLAN_FILTER;
ndev->netdev_ops = &cpsw_netdev_ops;
SET_ETHTOOL_OPS(ndev, &cpsw_ethtool_ops);
netif_napi_add(ndev, &priv_sl2->napi, cpsw_poll, CPSW_POLL_WEIGHT);
/* register the network device */
SET_NETDEV_DEV(ndev, &pdev->dev);
ret = register_netdev(ndev);
if (ret) {
pr_err("cpsw: error registering net device\n");
free_netdev(ndev);
ret = -ENODEV;
}
return ret;
}
static int cpsw_probe(struct platform_device *pdev)
{
struct cpsw_platform_data *data = pdev->dev.platform_data;
struct net_device *ndev;
struct cpsw_priv *priv;
struct cpdma_params dma_params;
struct cpsw_ale_params ale_params;
void __iomem *ss_regs, *wr_regs;
struct resource *res;
u32 slave_offset, sliver_offset, slave_size;
int ret = 0, i, k = 0;
ndev = alloc_etherdev(sizeof(struct cpsw_priv));
if (!ndev) {
pr_err("error allocating net_device\n");
return -ENOMEM;
}
platform_set_drvdata(pdev, ndev);
priv = netdev_priv(ndev);
spin_lock_init(&priv->lock);
priv->pdev = pdev;
priv->ndev = ndev;
priv->dev = &ndev->dev;
priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
priv->rx_packet_max = max(rx_packet_max, 128);
priv->cpts = devm_kzalloc(&pdev->dev, sizeof(struct cpts), GFP_KERNEL);
if (!ndev) {
pr_err("error allocating cpts\n");
goto clean_ndev_ret;
}
/*
* This may be required here for child devices.
*/
pm_runtime_enable(&pdev->dev);
if (cpsw_probe_dt(&priv->data, pdev)) {
pr_err("cpsw: platform data missing\n");
ret = -ENODEV;
goto clean_ndev_ret;
}
data = &priv->data;
if (is_valid_ether_addr(data->slave_data[0].mac_addr)) {
memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
pr_info("Detected MACID = %pM", priv->mac_addr);
} else {
eth_random_addr(priv->mac_addr);
pr_info("Random MACID = %pM", priv->mac_addr);
}
memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN);
priv->slaves = kzalloc(sizeof(struct cpsw_slave) * data->slaves,
GFP_KERNEL);
if (!priv->slaves) {
ret = -EBUSY;
goto clean_ndev_ret;
}
for (i = 0; i < data->slaves; i++)
priv->slaves[i].slave_num = i;
priv->slaves[0].ndev = ndev;
priv->emac_port = 0;
priv->clk = clk_get(&pdev->dev, "fck");
if (IS_ERR(priv->clk)) {
dev_err(&pdev->dev, "fck is not found\n");
ret = -ENODEV;
goto clean_slave_ret;
}
priv->coal_intvl = 0;
priv->bus_freq_mhz = clk_get_rate(priv->clk) / 1000000;
priv->cpsw_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!priv->cpsw_res) {
dev_err(priv->dev, "error getting i/o resource\n");
ret = -ENOENT;
goto clean_clk_ret;
}
if (!request_mem_region(priv->cpsw_res->start,
resource_size(priv->cpsw_res), ndev->name)) {
dev_err(priv->dev, "failed request i/o region\n");
ret = -ENXIO;
goto clean_clk_ret;
}
ss_regs = ioremap(priv->cpsw_res->start, resource_size(priv->cpsw_res));
if (!ss_regs) {
dev_err(priv->dev, "unable to map i/o region\n");
goto clean_cpsw_iores_ret;
}
priv->regs = ss_regs;
priv->version = __raw_readl(&priv->regs->id_ver);
priv->host_port = HOST_PORT_NUM;
priv->cpsw_wr_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!priv->cpsw_wr_res) {
dev_err(priv->dev, "error getting i/o resource\n");
ret = -ENOENT;
goto clean_iomap_ret;
}
if (!request_mem_region(priv->cpsw_wr_res->start,
resource_size(priv->cpsw_wr_res), ndev->name)) {
dev_err(priv->dev, "failed request i/o region\n");
ret = -ENXIO;
goto clean_iomap_ret;
}
wr_regs = ioremap(priv->cpsw_wr_res->start,
resource_size(priv->cpsw_wr_res));
if (!wr_regs) {
dev_err(priv->dev, "unable to map i/o region\n");
goto clean_cpsw_wr_iores_ret;
}
priv->wr_regs = wr_regs;
memset(&dma_params, 0, sizeof(dma_params));
memset(&ale_params, 0, sizeof(ale_params));
switch (priv->version) {
case CPSW_VERSION_1:
priv->host_port_regs = ss_regs + CPSW1_HOST_PORT_OFFSET;
priv->cpts->reg = ss_regs + CPSW1_CPTS_OFFSET;
dma_params.dmaregs = ss_regs + CPSW1_CPDMA_OFFSET;
dma_params.txhdp = ss_regs + CPSW1_STATERAM_OFFSET;
ale_params.ale_regs = ss_regs + CPSW1_ALE_OFFSET;
slave_offset = CPSW1_SLAVE_OFFSET;
slave_size = CPSW1_SLAVE_SIZE;
sliver_offset = CPSW1_SLIVER_OFFSET;
dma_params.desc_mem_phys = 0;
break;
case CPSW_VERSION_2:
priv->host_port_regs = ss_regs + CPSW2_HOST_PORT_OFFSET;
priv->cpts->reg = ss_regs + CPSW2_CPTS_OFFSET;
dma_params.dmaregs = ss_regs + CPSW2_CPDMA_OFFSET;
dma_params.txhdp = ss_regs + CPSW2_STATERAM_OFFSET;
ale_params.ale_regs = ss_regs + CPSW2_ALE_OFFSET;
slave_offset = CPSW2_SLAVE_OFFSET;
slave_size = CPSW2_SLAVE_SIZE;
sliver_offset = CPSW2_SLIVER_OFFSET;
dma_params.desc_mem_phys =
(u32 __force) priv->cpsw_res->start + CPSW2_BD_OFFSET;
break;
default:
dev_err(priv->dev, "unknown version 0x%08x\n", priv->version);
ret = -ENODEV;
goto clean_cpsw_wr_iores_ret;
}
for (i = 0; i < priv->data.slaves; i++) {
struct cpsw_slave *slave = &priv->slaves[i];
cpsw_slave_init(slave, priv, slave_offset, sliver_offset);
slave_offset += slave_size;
sliver_offset += SLIVER_SIZE;
}
dma_params.dev = &pdev->dev;
dma_params.rxthresh = dma_params.dmaregs + CPDMA_RXTHRESH;
dma_params.rxfree = dma_params.dmaregs + CPDMA_RXFREE;
dma_params.rxhdp = dma_params.txhdp + CPDMA_RXHDP;
dma_params.txcp = dma_params.txhdp + CPDMA_TXCP;
dma_params.rxcp = dma_params.txhdp + CPDMA_RXCP;
dma_params.num_chan = data->channels;
dma_params.has_soft_reset = true;
dma_params.min_packet_size = CPSW_MIN_PACKET_SIZE;
dma_params.desc_mem_size = data->bd_ram_size;
dma_params.desc_align = 16;
dma_params.has_ext_regs = true;
dma_params.desc_hw_addr = dma_params.desc_mem_phys;
priv->dma = cpdma_ctlr_create(&dma_params);
if (!priv->dma) {
dev_err(priv->dev, "error initializing dma\n");
ret = -ENOMEM;
goto clean_wr_iomap_ret;
}
priv->txch = cpdma_chan_create(priv->dma, tx_chan_num(0),
cpsw_tx_handler);
priv->rxch = cpdma_chan_create(priv->dma, rx_chan_num(0),
cpsw_rx_handler);
if (WARN_ON(!priv->txch || !priv->rxch)) {
dev_err(priv->dev, "error initializing dma channels\n");
ret = -ENOMEM;
goto clean_dma_ret;
}
ale_params.dev = &ndev->dev;
ale_params.ale_ageout = ale_ageout;
ale_params.ale_entries = data->ale_entries;
ale_params.ale_ports = data->slaves;
priv->ale = cpsw_ale_create(&ale_params);
if (!priv->ale) {
dev_err(priv->dev, "error initializing ale engine\n");
ret = -ENODEV;
goto clean_dma_ret;
}
ndev->irq = platform_get_irq(pdev, 0);
if (ndev->irq < 0) {
dev_err(priv->dev, "error getting irq resource\n");
ret = -ENOENT;
goto clean_ale_ret;
}
while ((res = platform_get_resource(priv->pdev, IORESOURCE_IRQ, k))) {
for (i = res->start; i <= res->end; i++) {
if (request_irq(i, cpsw_interrupt, IRQF_DISABLED,
dev_name(&pdev->dev), priv)) {
dev_err(priv->dev, "error attaching irq\n");
goto clean_ale_ret;
}
priv->irqs_table[k] = i;
priv->num_irqs = k;
}
k++;
}
ndev->features |= NETIF_F_HW_VLAN_FILTER;
ndev->netdev_ops = &cpsw_netdev_ops;
SET_ETHTOOL_OPS(ndev, &cpsw_ethtool_ops);
netif_napi_add(ndev, &priv->napi, cpsw_poll, CPSW_POLL_WEIGHT);
/* register the network device */
SET_NETDEV_DEV(ndev, &pdev->dev);
ret = register_netdev(ndev);
if (ret) {
dev_err(priv->dev, "error registering net device\n");
ret = -ENODEV;
goto clean_irq_ret;
}
if (cpts_register(&pdev->dev, priv->cpts,
data->cpts_clock_mult, data->cpts_clock_shift))
dev_err(priv->dev, "error registering cpts device\n");
cpsw_notice(priv, probe, "initialized device (regs %x, irq %d)\n",
priv->cpsw_res->start, ndev->irq);
if (priv->data.dual_emac) {
ret = cpsw_probe_dual_emac(pdev, priv);
if (ret) {
cpsw_err(priv, probe, "error probe slave 2 emac interface\n");
goto clean_irq_ret;
}
}
return 0;
clean_irq_ret:
free_irq(ndev->irq, priv);
clean_ale_ret:
cpsw_ale_destroy(priv->ale);
clean_dma_ret:
cpdma_chan_destroy(priv->txch);
cpdma_chan_destroy(priv->rxch);
cpdma_ctlr_destroy(priv->dma);
clean_wr_iomap_ret:
iounmap(priv->wr_regs);
clean_cpsw_wr_iores_ret:
release_mem_region(priv->cpsw_wr_res->start,
resource_size(priv->cpsw_wr_res));
clean_iomap_ret:
iounmap(priv->regs);
clean_cpsw_iores_ret:
release_mem_region(priv->cpsw_res->start,
resource_size(priv->cpsw_res));
clean_clk_ret:
clk_put(priv->clk);
clean_slave_ret:
pm_runtime_disable(&pdev->dev);
kfree(priv->slaves);
clean_ndev_ret:
free_netdev(ndev);
return ret;
}
static int cpsw_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct cpsw_priv *priv = netdev_priv(ndev);
pr_info("removing device");
platform_set_drvdata(pdev, NULL);
cpts_unregister(priv->cpts);
free_irq(ndev->irq, priv);
cpsw_ale_destroy(priv->ale);
cpdma_chan_destroy(priv->txch);
cpdma_chan_destroy(priv->rxch);
cpdma_ctlr_destroy(priv->dma);
iounmap(priv->regs);
release_mem_region(priv->cpsw_res->start,
resource_size(priv->cpsw_res));
iounmap(priv->wr_regs);
release_mem_region(priv->cpsw_wr_res->start,
resource_size(priv->cpsw_wr_res));
pm_runtime_disable(&pdev->dev);
clk_put(priv->clk);
kfree(priv->slaves);
free_netdev(ndev);
return 0;
}
static int cpsw_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct net_device *ndev = platform_get_drvdata(pdev);
if (netif_running(ndev))
cpsw_ndo_stop(ndev);
pm_runtime_put_sync(&pdev->dev);
return 0;
}
static int cpsw_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct net_device *ndev = platform_get_drvdata(pdev);
pm_runtime_get_sync(&pdev->dev);
if (netif_running(ndev))
cpsw_ndo_open(ndev);
return 0;
}
static const struct dev_pm_ops cpsw_pm_ops = {
.suspend = cpsw_suspend,
.resume = cpsw_resume,
};
static const struct of_device_id cpsw_of_mtable[] = {
{ .compatible = "ti,cpsw", },
{ /* sentinel */ },
};
static struct platform_driver cpsw_driver = {
.driver = {
.name = "cpsw",
.owner = THIS_MODULE,
.pm = &cpsw_pm_ops,
.of_match_table = of_match_ptr(cpsw_of_mtable),
},
.probe = cpsw_probe,
.remove = cpsw_remove,
};
static int __init cpsw_init(void)
{
return platform_driver_register(&cpsw_driver);
}
late_initcall(cpsw_init);
static void __exit cpsw_exit(void)
{
platform_driver_unregister(&cpsw_driver);
}
module_exit(cpsw_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>");
MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
MODULE_DESCRIPTION("TI CPSW Ethernet driver");
