diff options
Diffstat (limited to 'drivers/net/phy/mscc/mscc_ptp.c')
| -rw-r--r-- | drivers/net/phy/mscc/mscc_ptp.c | 1590 |
1 files changed, 1590 insertions, 0 deletions
diff --git a/drivers/net/phy/mscc/mscc_ptp.c b/drivers/net/phy/mscc/mscc_ptp.c new file mode 100644 index 000000000000..b97ee79f3cdf --- /dev/null +++ b/drivers/net/phy/mscc/mscc_ptp.c @@ -0,0 +1,1590 @@ +// SPDX-License-Identifier: (GPL-2.0 OR MIT) +/* + * Driver for Microsemi VSC85xx PHYs - timestamping and PHC support + * + * Authors: Quentin Schulz & Antoine Tenart + * License: Dual MIT/GPL + * Copyright (c) 2020 Microsemi Corporation + */ + +#include <linux/gpio/consumer.h> +#include <linux/ip.h> +#include <linux/net_tstamp.h> +#include <linux/mii.h> +#include <linux/phy.h> +#include <linux/ptp_classify.h> +#include <linux/ptp_clock_kernel.h> +#include <linux/udp.h> +#include <asm/unaligned.h> + +#include "mscc.h" +#include "mscc_ptp.h" + +/* Two PHYs share the same 1588 processor and it's to be entirely configured + * through the base PHY of this processor. + */ +/* phydev->bus->mdio_lock should be locked when using this function */ +static int phy_ts_base_write(struct phy_device *phydev, u32 regnum, u16 val) +{ + struct vsc8531_private *priv = phydev->priv; + + WARN_ON_ONCE(!mutex_is_locked(&phydev->mdio.bus->mdio_lock)); + return __mdiobus_write(phydev->mdio.bus, priv->ts_base_addr, regnum, + val); +} + +/* phydev->bus->mdio_lock should be locked when using this function */ +static int phy_ts_base_read(struct phy_device *phydev, u32 regnum) +{ + struct vsc8531_private *priv = phydev->priv; + + WARN_ON_ONCE(!mutex_is_locked(&phydev->mdio.bus->mdio_lock)); + return __mdiobus_read(phydev->mdio.bus, priv->ts_base_addr, regnum); +} + +enum ts_blk_hw { + INGRESS_ENGINE_0, + EGRESS_ENGINE_0, + INGRESS_ENGINE_1, + EGRESS_ENGINE_1, + INGRESS_ENGINE_2, + EGRESS_ENGINE_2, + PROCESSOR_0, + PROCESSOR_1, +}; + +enum ts_blk { + INGRESS, + EGRESS, + PROCESSOR, +}; + +static u32 vsc85xx_ts_read_csr(struct phy_device *phydev, enum ts_blk blk, + u16 addr) +{ + struct vsc8531_private *priv = phydev->priv; + bool base_port = phydev->mdio.addr == priv->ts_base_addr; + u32 val, cnt = 0; + enum ts_blk_hw blk_hw; + + switch (blk) { + case INGRESS: + blk_hw = base_port ? INGRESS_ENGINE_0 : INGRESS_ENGINE_1; + break; + case EGRESS: + blk_hw = base_port ? EGRESS_ENGINE_0 : EGRESS_ENGINE_1; + break; + case PROCESSOR: + default: + blk_hw = base_port ? PROCESSOR_0 : PROCESSOR_1; + break; + } + + phy_lock_mdio_bus(phydev); + + phy_ts_base_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_1588); + + phy_ts_base_write(phydev, MSCC_PHY_TS_BIU_ADDR_CNTL, BIU_ADDR_EXE | + BIU_ADDR_READ | BIU_BLK_ID(blk_hw) | + BIU_CSR_ADDR(addr)); + + do { + val = phy_ts_base_read(phydev, MSCC_PHY_TS_BIU_ADDR_CNTL); + } while (!(val & BIU_ADDR_EXE) && cnt++ < BIU_ADDR_CNT_MAX); + + val = phy_ts_base_read(phydev, MSCC_PHY_TS_CSR_DATA_MSB); + val <<= 16; + val |= phy_ts_base_read(phydev, MSCC_PHY_TS_CSR_DATA_LSB); + + phy_ts_base_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_STANDARD); + + phy_unlock_mdio_bus(phydev); + + return val; +} + +static void vsc85xx_ts_write_csr(struct phy_device *phydev, enum ts_blk blk, + u16 addr, u32 val) +{ + struct vsc8531_private *priv = phydev->priv; + bool base_port = phydev->mdio.addr == priv->ts_base_addr; + u32 reg, bypass, cnt = 0, lower = val & 0xffff, upper = val >> 16; + bool cond = (addr == MSCC_PHY_PTP_LTC_CTRL || + addr == MSCC_PHY_1588_INGR_VSC85XX_INT_MASK || + addr == MSCC_PHY_1588_VSC85XX_INT_MASK || + addr == MSCC_PHY_1588_INGR_VSC85XX_INT_STATUS || + addr == MSCC_PHY_1588_VSC85XX_INT_STATUS) && + blk == PROCESSOR; + enum ts_blk_hw blk_hw; + + switch (blk) { + case INGRESS: + blk_hw = base_port ? INGRESS_ENGINE_0 : INGRESS_ENGINE_1; + break; + case EGRESS: + blk_hw = base_port ? EGRESS_ENGINE_0 : EGRESS_ENGINE_1; + break; + case PROCESSOR: + default: + blk_hw = base_port ? PROCESSOR_0 : PROCESSOR_1; + break; + } + + phy_lock_mdio_bus(phydev); + + bypass = phy_ts_base_read(phydev, MSCC_PHY_BYPASS_CONTROL); + + phy_ts_base_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_1588); + + if (!cond || (cond && upper)) + phy_ts_base_write(phydev, MSCC_PHY_TS_CSR_DATA_MSB, upper); + + phy_ts_base_write(phydev, MSCC_PHY_TS_CSR_DATA_LSB, lower); + + phy_ts_base_write(phydev, MSCC_PHY_TS_BIU_ADDR_CNTL, BIU_ADDR_EXE | + BIU_ADDR_WRITE | BIU_BLK_ID(blk_hw) | + BIU_CSR_ADDR(addr)); + + do { + reg = phy_ts_base_read(phydev, MSCC_PHY_TS_BIU_ADDR_CNTL); + } while (!(reg & BIU_ADDR_EXE) && cnt++ < BIU_ADDR_CNT_MAX); + + phy_ts_base_write(phydev, MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_STANDARD); + + if (cond && upper) + phy_ts_base_write(phydev, MSCC_PHY_BYPASS_CONTROL, bypass); + + phy_unlock_mdio_bus(phydev); +} + +/* Pick bytes from PTP header */ +#define PTP_HEADER_TRNSP_MSG 26 +#define PTP_HEADER_DOMAIN_NUM 25 +#define PTP_HEADER_BYTE_8_31(x) (31 - (x)) +#define MAC_ADDRESS_BYTE(x) ((x) + (35 - ETH_ALEN + 1)) + +static int vsc85xx_ts_fsb_init(struct phy_device *phydev) +{ + u8 sig_sel[16] = {}; + signed char i, pos = 0; + + /* Seq ID is 2B long and starts at 30th byte */ + for (i = 1; i >= 0; i--) + sig_sel[pos++] = PTP_HEADER_BYTE_8_31(30 + i); + + /* DomainNum */ + sig_sel[pos++] = PTP_HEADER_DOMAIN_NUM; + + /* MsgType */ + sig_sel[pos++] = PTP_HEADER_TRNSP_MSG; + + /* MAC address is 6B long */ + for (i = ETH_ALEN - 1; i >= 0; i--) + sig_sel[pos++] = MAC_ADDRESS_BYTE(i); + + /* Fill the last bytes of the signature to reach a 16B signature */ + for (; pos < ARRAY_SIZE(sig_sel); pos++) + sig_sel[pos] = PTP_HEADER_TRNSP_MSG; + + for (i = 0; i <= 2; i++) { + u32 val = 0; + + for (pos = i * 5 + 4; pos >= i * 5; pos--) + val = (val << 6) | sig_sel[pos]; + + vsc85xx_ts_write_csr(phydev, EGRESS, MSCC_PHY_ANA_FSB_REG(i), + val); + } + + vsc85xx_ts_write_csr(phydev, EGRESS, MSCC_PHY_ANA_FSB_REG(3), + sig_sel[15]); + + return 0; +} + +static const u32 vsc85xx_egr_latency[] = { + /* Copper Egress */ + 1272, /* 1000Mbps */ + 12516, /* 100Mbps */ + 125444, /* 10Mbps */ + /* Fiber Egress */ + 1277, /* 1000Mbps */ + 12537, /* 100Mbps */ +}; + +static const u32 vsc85xx_egr_latency_macsec[] = { + /* Copper Egress ON */ + 3496, /* 1000Mbps */ + 34760, /* 100Mbps */ + 347844, /* 10Mbps */ + /* Fiber Egress ON */ + 3502, /* 1000Mbps */ + 34780, /* 100Mbps */ +}; + +static const u32 vsc85xx_ingr_latency[] = { + /* Copper Ingress */ + 208, /* 1000Mbps */ + 304, /* 100Mbps */ + 2023, /* 10Mbps */ + /* Fiber Ingress */ + 98, /* 1000Mbps */ + 197, /* 100Mbps */ +}; + +static const u32 vsc85xx_ingr_latency_macsec[] = { + /* Copper Ingress */ + 2408, /* 1000Mbps */ + 22300, /* 100Mbps */ + 222009, /* 10Mbps */ + /* Fiber Ingress */ + 2299, /* 1000Mbps */ + 22192, /* 100Mbps */ +}; + +static void vsc85xx_ts_set_latencies(struct phy_device *phydev) +{ + u32 val, ingr_latency, egr_latency; + u8 idx; + + /* No need to set latencies of packets if the PHY is not connected */ + if (!phydev->link) + return; + + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_STALL_LATENCY, + STALL_EGR_LATENCY(phydev->speed)); + + switch (phydev->speed) { + case SPEED_100: + idx = 1; + break; + case SPEED_1000: + idx = 0; + break; + default: + idx = 2; + break; + } + + ingr_latency = IS_ENABLED(CONFIG_MACSEC) ? + vsc85xx_ingr_latency_macsec[idx] : vsc85xx_ingr_latency[idx]; + egr_latency = IS_ENABLED(CONFIG_MACSEC) ? + vsc85xx_egr_latency_macsec[idx] : vsc85xx_egr_latency[idx]; + + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_INGR_LOCAL_LATENCY, + PTP_INGR_LOCAL_LATENCY(ingr_latency)); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_INGR_TSP_CTRL); + val |= PHY_PTP_INGR_TSP_CTRL_LOAD_DELAYS; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_INGR_TSP_CTRL, + val); + + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_LOCAL_LATENCY, + PTP_EGR_LOCAL_LATENCY(egr_latency)); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_TSP_CTRL); + val |= PHY_PTP_EGR_TSP_CTRL_LOAD_DELAYS; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_TSP_CTRL, val); +} + +static int vsc85xx_ts_disable_flows(struct phy_device *phydev, enum ts_blk blk) +{ + u8 i; + + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_NXT_PROT_NXT_COMP, 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_NXT_PROT_UDP_CHKSUM, + IP1_NXT_PROT_UDP_CHKSUM_WIDTH(2)); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP2_NXT_PROT_NXT_COMP, 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP2_NXT_PROT_UDP_CHKSUM, + IP2_NXT_PROT_UDP_CHKSUM_WIDTH(2)); + vsc85xx_ts_write_csr(phydev, blk, MSCC_PHY_ANA_MPLS_COMP_NXT_COMP, 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_PHY_ANA_ETH1_NTX_PROT, 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_PHY_ANA_ETH2_NTX_PROT, 0); + + for (i = 0; i < COMP_MAX_FLOWS; i++) { + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_FLOW_ENA(i), + IP1_FLOW_VALID_CH0 | IP1_FLOW_VALID_CH1); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP2_FLOW_ENA(i), + IP2_FLOW_VALID_CH0 | IP2_FLOW_VALID_CH1); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_ETH1_FLOW_ENA(i), + ETH1_FLOW_VALID_CH0 | ETH1_FLOW_VALID_CH1); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_ETH2_FLOW_ENA(i), + ETH2_FLOW_VALID_CH0 | ETH2_FLOW_VALID_CH1); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_MPLS_FLOW_CTRL(i), + MPLS_FLOW_VALID_CH0 | MPLS_FLOW_VALID_CH1); + + if (i >= PTP_COMP_MAX_FLOWS) + continue; + + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_PTP_FLOW_ENA(i), 0); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_DOMAIN_RANGE(i), 0); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_MASK_UPPER(i), 0); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_MASK_LOWER(i), 0); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_MATCH_UPPER(i), 0); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_MATCH_LOWER(i), 0); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_PTP_ACTION(i), 0); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_PTP_ACTION2(i), 0); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_PTP_0_FIELD(i), 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_OAM_PTP_FLOW_ENA(i), + 0); + } + + return 0; +} + +static int vsc85xx_ts_eth_cmp1_sig(struct phy_device *phydev) +{ + u32 val; + + val = vsc85xx_ts_read_csr(phydev, EGRESS, MSCC_PHY_ANA_ETH1_NTX_PROT); + val &= ~ANA_ETH1_NTX_PROT_SIG_OFF_MASK; + val |= ANA_ETH1_NTX_PROT_SIG_OFF(0); + vsc85xx_ts_write_csr(phydev, EGRESS, MSCC_PHY_ANA_ETH1_NTX_PROT, val); + + val = vsc85xx_ts_read_csr(phydev, EGRESS, MSCC_PHY_ANA_FSB_CFG); + val &= ~ANA_FSB_ADDR_FROM_BLOCK_SEL_MASK; + val |= ANA_FSB_ADDR_FROM_ETH1; + vsc85xx_ts_write_csr(phydev, EGRESS, MSCC_PHY_ANA_FSB_CFG, val); + + return 0; +} + +static struct vsc85xx_ptphdr *get_ptp_header_l4(struct sk_buff *skb, + struct iphdr *iphdr, + struct udphdr *udphdr) +{ + if (iphdr->version != 4 || iphdr->protocol != IPPROTO_UDP) + return NULL; + + return (struct vsc85xx_ptphdr *)(((unsigned char *)udphdr) + UDP_HLEN); +} + +static struct vsc85xx_ptphdr *get_ptp_header_tx(struct sk_buff *skb) +{ + struct ethhdr *ethhdr = eth_hdr(skb); + struct udphdr *udphdr; + struct iphdr *iphdr; + + if (ethhdr->h_proto == htons(ETH_P_1588)) + return (struct vsc85xx_ptphdr *)(((unsigned char *)ethhdr) + + skb_mac_header_len(skb)); + + if (ethhdr->h_proto != htons(ETH_P_IP)) + return NULL; + + iphdr = ip_hdr(skb); + udphdr = udp_hdr(skb); + + return get_ptp_header_l4(skb, iphdr, udphdr); +} + +static struct vsc85xx_ptphdr *get_ptp_header_rx(struct sk_buff *skb, + enum hwtstamp_rx_filters rx_filter) +{ + struct udphdr *udphdr; + struct iphdr *iphdr; + + if (rx_filter == HWTSTAMP_FILTER_PTP_V2_L2_EVENT) + return (struct vsc85xx_ptphdr *)skb->data; + + iphdr = (struct iphdr *)skb->data; + udphdr = (struct udphdr *)(skb->data + iphdr->ihl * 4); + + return get_ptp_header_l4(skb, iphdr, udphdr); +} + +static int get_sig(struct sk_buff *skb, u8 *sig) +{ + struct vsc85xx_ptphdr *ptphdr = get_ptp_header_tx(skb); + struct ethhdr *ethhdr = eth_hdr(skb); + unsigned int i; + + if (!ptphdr) + return -EOPNOTSUPP; + + sig[0] = (__force u16)ptphdr->seq_id >> 8; + sig[1] = (__force u16)ptphdr->seq_id & GENMASK(7, 0); + sig[2] = ptphdr->domain; + sig[3] = ptphdr->tsmt & GENMASK(3, 0); + + memcpy(&sig[4], ethhdr->h_dest, ETH_ALEN); + + /* Fill the last bytes of the signature to reach a 16B signature */ + for (i = 10; i < 16; i++) + sig[i] = ptphdr->tsmt & GENMASK(3, 0); + + return 0; +} + +static void vsc85xx_dequeue_skb(struct vsc85xx_ptp *ptp) +{ + struct skb_shared_hwtstamps shhwtstamps; + struct vsc85xx_ts_fifo fifo; + struct sk_buff *skb; + u8 skb_sig[16], *p; + int i, len; + u32 reg; + + memset(&fifo, 0, sizeof(fifo)); + p = (u8 *)&fifo; + + reg = vsc85xx_ts_read_csr(ptp->phydev, PROCESSOR, + MSCC_PHY_PTP_EGR_TS_FIFO(0)); + if (reg & PTP_EGR_TS_FIFO_EMPTY) + return; + + *p++ = reg & 0xff; + *p++ = (reg >> 8) & 0xff; + + /* Read the current FIFO item. Reading FIFO6 pops the next one. */ + for (i = 1; i < 7; i++) { + reg = vsc85xx_ts_read_csr(ptp->phydev, PROCESSOR, + MSCC_PHY_PTP_EGR_TS_FIFO(i)); + *p++ = reg & 0xff; + *p++ = (reg >> 8) & 0xff; + *p++ = (reg >> 16) & 0xff; + *p++ = (reg >> 24) & 0xff; + } + + len = skb_queue_len(&ptp->tx_queue); + if (len < 1) + return; + + while (len--) { + skb = __skb_dequeue(&ptp->tx_queue); + if (!skb) + return; + + /* Can't get the signature of the packet, won't ever + * be able to have one so let's dequeue the packet. + */ + if (get_sig(skb, skb_sig) < 0) { + kfree_skb(skb); + continue; + } + + /* Check if we found the signature we were looking for. */ + if (!memcmp(skb_sig, fifo.sig, sizeof(fifo.sig))) { + memset(&shhwtstamps, 0, sizeof(shhwtstamps)); + shhwtstamps.hwtstamp = ktime_set(fifo.secs, fifo.ns); + skb_complete_tx_timestamp(skb, &shhwtstamps); + + return; + } + + /* Valid signature but does not match the one of the + * packet in the FIFO right now, reschedule it for later + * packets. + */ + __skb_queue_tail(&ptp->tx_queue, skb); + } +} + +static void vsc85xx_get_tx_ts(struct vsc85xx_ptp *ptp) +{ + u32 reg; + + do { + vsc85xx_dequeue_skb(ptp); + + /* If other timestamps are available in the FIFO, process them. */ + reg = vsc85xx_ts_read_csr(ptp->phydev, PROCESSOR, + MSCC_PHY_PTP_EGR_TS_FIFO_CTRL); + } while (PTP_EGR_FIFO_LEVEL_LAST_READ(reg) > 1); +} + +static int vsc85xx_ptp_cmp_init(struct phy_device *phydev, enum ts_blk blk) +{ + struct vsc8531_private *vsc8531 = phydev->priv; + bool base = phydev->mdio.addr == vsc8531->ts_base_addr; + enum vsc85xx_ptp_msg_type msgs[] = { + PTP_MSG_TYPE_SYNC, + PTP_MSG_TYPE_DELAY_REQ + }; + u32 val; + u8 i; + + for (i = 0; i < ARRAY_SIZE(msgs); i++) { + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_PTP_FLOW_ENA(i), + base ? PTP_FLOW_VALID_CH0 : + PTP_FLOW_VALID_CH1); + + val = vsc85xx_ts_read_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_DOMAIN_RANGE(i)); + val &= ~PTP_FLOW_DOMAIN_RANGE_ENA; + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_DOMAIN_RANGE(i), val); + + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_MATCH_UPPER(i), + msgs[i] << 24); + + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_MASK_UPPER(i), + PTP_FLOW_MSG_TYPE_MASK); + } + + return 0; +} + +static int vsc85xx_eth_cmp1_init(struct phy_device *phydev, enum ts_blk blk) +{ + struct vsc8531_private *vsc8531 = phydev->priv; + bool base = phydev->mdio.addr == vsc8531->ts_base_addr; + u32 val; + + vsc85xx_ts_write_csr(phydev, blk, MSCC_PHY_ANA_ETH1_NXT_PROT_TAG, 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_PHY_ANA_ETH1_NTX_PROT_VLAN_TPID, + ANA_ETH1_NTX_PROT_VLAN_TPID(ETH_P_8021AD)); + + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_ETH1_FLOW_ENA(0), + base ? ETH1_FLOW_VALID_CH0 : ETH1_FLOW_VALID_CH1); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_ETH1_FLOW_MATCH_MODE(0), + ANA_ETH1_FLOW_MATCH_VLAN_TAG2); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_ETH1_FLOW_ADDR_MATCH1(0), 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_ETH1_FLOW_ADDR_MATCH2(0), 0); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_ETH1_FLOW_VLAN_RANGE_I_TAG(0), 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_ETH1_FLOW_VLAN_TAG1(0), 0); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_ETH1_FLOW_VLAN_TAG2_I_TAG(0), 0); + + val = vsc85xx_ts_read_csr(phydev, blk, + MSCC_ANA_ETH1_FLOW_MATCH_MODE(0)); + val &= ~ANA_ETH1_FLOW_MATCH_VLAN_TAG_MASK; + val |= ANA_ETH1_FLOW_MATCH_VLAN_VERIFY; + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_ETH1_FLOW_MATCH_MODE(0), + val); + + return 0; +} + +static int vsc85xx_ip_cmp1_init(struct phy_device *phydev, enum ts_blk blk) +{ + struct vsc8531_private *vsc8531 = phydev->priv; + bool base = phydev->mdio.addr == vsc8531->ts_base_addr; + u32 val; + + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_NXT_PROT_MATCH2_UPPER, + PTP_EV_PORT); + /* Match on dest port only, ignore src */ + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_NXT_PROT_MASK2_UPPER, + 0xffff); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_NXT_PROT_MATCH2_LOWER, + 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_NXT_PROT_MASK2_LOWER, 0); + + val = vsc85xx_ts_read_csr(phydev, blk, MSCC_ANA_IP1_FLOW_ENA(0)); + val &= ~IP1_FLOW_ENA_CHANNEL_MASK_MASK; + val |= base ? IP1_FLOW_VALID_CH0 : IP1_FLOW_VALID_CH1; + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_FLOW_ENA(0), val); + + /* Match all IPs */ + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_FLOW_MATCH_UPPER(0), 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_FLOW_MASK_UPPER(0), 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_FLOW_MATCH_UPPER_MID(0), + 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_FLOW_MASK_UPPER_MID(0), + 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_FLOW_MATCH_LOWER_MID(0), + 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_FLOW_MASK_LOWER_MID(0), + 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_FLOW_MATCH_LOWER(0), 0); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_FLOW_MASK_LOWER(0), 0); + + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_PTP_IP_CHKSUM_SEL, 0); + + return 0; +} + +static int vsc85xx_adjfine(struct ptp_clock_info *info, long scaled_ppm) +{ + struct vsc85xx_ptp *ptp = container_of(info, struct vsc85xx_ptp, caps); + struct phy_device *phydev = ptp->phydev; + struct vsc8531_private *priv = phydev->priv; + u64 adj = 0; + u32 val; + + if (abs(scaled_ppm) < 66 || abs(scaled_ppm) > 65536UL * 1000000UL) + return 0; + + adj = div64_u64(1000000ULL * 65536ULL, abs(scaled_ppm)); + if (adj > 1000000000L) + adj = 1000000000L; + + val = PTP_AUTO_ADJ_NS_ROLLOVER(adj); + val |= scaled_ppm > 0 ? PTP_AUTO_ADJ_ADD_1NS : PTP_AUTO_ADJ_SUB_1NS; + + mutex_lock(&priv->phc_lock); + + /* Update the ppb val in nano seconds to the auto adjust reg. */ + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_AUTO_ADJ, + val); + + /* The auto adjust update val is set to 0 after write operation. */ + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_CTRL); + val |= PTP_LTC_CTRL_AUTO_ADJ_UPDATE; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_CTRL, val); + + mutex_unlock(&priv->phc_lock); + + return 0; +} + +static int __vsc85xx_gettime(struct ptp_clock_info *info, struct timespec64 *ts) +{ + struct vsc85xx_ptp *ptp = container_of(info, struct vsc85xx_ptp, caps); + struct phy_device *phydev = ptp->phydev; + struct vsc85xx_shared_private *shared = + (struct vsc85xx_shared_private *)phydev->shared->priv; + struct vsc8531_private *priv = phydev->priv; + u32 val; + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_CTRL); + val |= PTP_LTC_CTRL_SAVE_ENA; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_CTRL, val); + + /* Local Time Counter (LTC) is put in SAVE* regs on rising edge of + * LOAD_SAVE pin. + */ + mutex_lock(&shared->gpio_lock); + gpiod_set_value(priv->load_save, 1); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_LTC_SAVED_SEC_MSB); + + ts->tv_sec = ((time64_t)val) << 32; + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_LTC_SAVED_SEC_LSB); + ts->tv_sec += val; + + ts->tv_nsec = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_LTC_SAVED_NS); + + gpiod_set_value(priv->load_save, 0); + mutex_unlock(&shared->gpio_lock); + + return 0; +} + +static int vsc85xx_gettime(struct ptp_clock_info *info, struct timespec64 *ts) +{ + struct vsc85xx_ptp *ptp = container_of(info, struct vsc85xx_ptp, caps); + struct phy_device *phydev = ptp->phydev; + struct vsc8531_private *priv = phydev->priv; + + mutex_lock(&priv->phc_lock); + __vsc85xx_gettime(info, ts); + mutex_unlock(&priv->phc_lock); + + return 0; +} + +static int __vsc85xx_settime(struct ptp_clock_info *info, + const struct timespec64 *ts) +{ + struct vsc85xx_ptp *ptp = container_of(info, struct vsc85xx_ptp, caps); + struct phy_device *phydev = ptp->phydev; + struct vsc85xx_shared_private *shared = + (struct vsc85xx_shared_private *)phydev->shared->priv; + struct vsc8531_private *priv = phydev->priv; + u32 val; + + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_LOAD_SEC_MSB, + PTP_LTC_LOAD_SEC_MSB(ts->tv_sec)); + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_LOAD_SEC_LSB, + PTP_LTC_LOAD_SEC_LSB(ts->tv_sec)); + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_LOAD_NS, + PTP_LTC_LOAD_NS(ts->tv_nsec)); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_CTRL); + val |= PTP_LTC_CTRL_LOAD_ENA; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_CTRL, val); + + /* Local Time Counter (LTC) is set from LOAD* regs on rising edge of + * LOAD_SAVE pin. + */ + mutex_lock(&shared->gpio_lock); + gpiod_set_value(priv->load_save, 1); + + val &= ~PTP_LTC_CTRL_LOAD_ENA; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_CTRL, val); + + gpiod_set_value(priv->load_save, 0); + mutex_unlock(&shared->gpio_lock); + + return 0; +} + +static int vsc85xx_settime(struct ptp_clock_info *info, + const struct timespec64 *ts) +{ + struct vsc85xx_ptp *ptp = container_of(info, struct vsc85xx_ptp, caps); + struct phy_device *phydev = ptp->phydev; + struct vsc8531_private *priv = phydev->priv; + + mutex_lock(&priv->phc_lock); + __vsc85xx_settime(info, ts); + mutex_unlock(&priv->phc_lock); + + return 0; +} + +static int vsc85xx_adjtime(struct ptp_clock_info *info, s64 delta) +{ + struct vsc85xx_ptp *ptp = container_of(info, struct vsc85xx_ptp, caps); + struct phy_device *phydev = ptp->phydev; + struct vsc8531_private *priv = phydev->priv; + u32 val; + + /* Can't recover that big of an offset. Let's set the time directly. */ + if (abs(delta) >= NSEC_PER_SEC) { + struct timespec64 ts; + u64 now; + + mutex_lock(&priv->phc_lock); + + __vsc85xx_gettime(info, &ts); + now = ktime_to_ns(timespec64_to_ktime(ts)); + ts = ns_to_timespec64(now + delta); + __vsc85xx_settime(info, &ts); + + mutex_unlock(&priv->phc_lock); + + return 0; + } + + mutex_lock(&priv->phc_lock); + + val = PTP_LTC_OFFSET_VAL(abs(delta)) | PTP_LTC_OFFSET_ADJ; + if (delta > 0) + val |= PTP_LTC_OFFSET_ADD; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_OFFSET, val); + + mutex_unlock(&priv->phc_lock); + + return 0; +} + +static int vsc85xx_eth1_next_comp(struct phy_device *phydev, enum ts_blk blk, + u32 next_comp, u32 etype) +{ + u32 val; + + val = vsc85xx_ts_read_csr(phydev, blk, MSCC_PHY_ANA_ETH1_NTX_PROT); + val &= ~ANA_ETH1_NTX_PROT_COMPARATOR_MASK; + val |= next_comp; + vsc85xx_ts_write_csr(phydev, blk, MSCC_PHY_ANA_ETH1_NTX_PROT, val); + + val = ANA_ETH1_NXT_PROT_ETYPE_MATCH(etype) | + ANA_ETH1_NXT_PROT_ETYPE_MATCH_ENA; + vsc85xx_ts_write_csr(phydev, blk, + MSCC_PHY_ANA_ETH1_NXT_PROT_ETYPE_MATCH, val); + + return 0; +} + +static int vsc85xx_ip1_next_comp(struct phy_device *phydev, enum ts_blk blk, + u32 next_comp, u32 header) +{ + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_NXT_PROT_NXT_COMP, + ANA_IP1_NXT_PROT_NXT_COMP_BYTES_HDR(header) | + next_comp); + + return 0; +} + +static int vsc85xx_ts_ptp_action_flow(struct phy_device *phydev, enum ts_blk blk, u8 flow, enum ptp_cmd cmd) +{ + u32 val; + + /* Check non-zero reserved field */ + val = PTP_FLOW_PTP_0_FIELD_PTP_FRAME | PTP_FLOW_PTP_0_FIELD_RSVRD_CHECK; + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_PTP_0_FIELD(flow), val); + + val = PTP_FLOW_PTP_ACTION_CORR_OFFSET(8) | + PTP_FLOW_PTP_ACTION_TIME_OFFSET(8) | + PTP_FLOW_PTP_ACTION_PTP_CMD(cmd == PTP_SAVE_IN_TS_FIFO ? + PTP_NOP : cmd); + if (cmd == PTP_SAVE_IN_TS_FIFO) + val |= PTP_FLOW_PTP_ACTION_SAVE_LOCAL_TIME; + else if (cmd == PTP_WRITE_NS) + val |= PTP_FLOW_PTP_ACTION_MOD_FRAME_STATUS_UPDATE | + PTP_FLOW_PTP_ACTION_MOD_FRAME_STATUS_BYTE_OFFSET(6); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_PTP_FLOW_PTP_ACTION(flow), + val); + + if (cmd == PTP_WRITE_1588) + /* Rewrite timestamp directly in frame */ + val = PTP_FLOW_PTP_ACTION2_REWRITE_OFFSET(34) | + PTP_FLOW_PTP_ACTION2_REWRITE_BYTES(10); + else if (cmd == PTP_SAVE_IN_TS_FIFO) + /* no rewrite */ + val = PTP_FLOW_PTP_ACTION2_REWRITE_OFFSET(0) | + PTP_FLOW_PTP_ACTION2_REWRITE_BYTES(0); + else + /* Write in reserved field */ + val = PTP_FLOW_PTP_ACTION2_REWRITE_OFFSET(16) | + PTP_FLOW_PTP_ACTION2_REWRITE_BYTES(4); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_PTP_ACTION2(flow), val); + + return 0; +} + +static int vsc85xx_ptp_conf(struct phy_device *phydev, enum ts_blk blk, + bool one_step, bool enable) +{ + enum vsc85xx_ptp_msg_type msgs[] = { + PTP_MSG_TYPE_SYNC, + PTP_MSG_TYPE_DELAY_REQ + }; + u32 val; + u8 i; + + for (i = 0; i < ARRAY_SIZE(msgs); i++) { + if (blk == INGRESS) + vsc85xx_ts_ptp_action_flow(phydev, blk, msgs[i], + PTP_WRITE_NS); + else if (msgs[i] == PTP_MSG_TYPE_SYNC && one_step) + /* no need to know Sync t when sending in one_step */ + vsc85xx_ts_ptp_action_flow(phydev, blk, msgs[i], + PTP_WRITE_1588); + else + vsc85xx_ts_ptp_action_flow(phydev, blk, msgs[i], + PTP_SAVE_IN_TS_FIFO); + + val = vsc85xx_ts_read_csr(phydev, blk, + MSCC_ANA_PTP_FLOW_ENA(i)); + val &= ~PTP_FLOW_ENA; + if (enable) + val |= PTP_FLOW_ENA; + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_PTP_FLOW_ENA(i), + val); + } + + return 0; +} + +static int vsc85xx_eth1_conf(struct phy_device *phydev, enum ts_blk blk, + bool enable) +{ + struct vsc8531_private *vsc8531 = phydev->priv; + u32 val = ANA_ETH1_FLOW_ADDR_MATCH2_DEST; + + if (vsc8531->ptp->rx_filter == HWTSTAMP_FILTER_PTP_V2_L2_EVENT) { + /* PTP over Ethernet multicast address for SYNC and DELAY msg */ + u8 ptp_multicast[6] = {0x01, 0x1b, 0x19, 0x00, 0x00, 0x00}; + + val |= ANA_ETH1_FLOW_ADDR_MATCH2_FULL_ADDR | + get_unaligned_be16(&ptp_multicast[4]); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_ETH1_FLOW_ADDR_MATCH2(0), val); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_ETH1_FLOW_ADDR_MATCH1(0), + get_unaligned_be32(ptp_multicast)); + } else { + val |= ANA_ETH1_FLOW_ADDR_MATCH2_ANY_MULTICAST; + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_ETH1_FLOW_ADDR_MATCH2(0), val); + vsc85xx_ts_write_csr(phydev, blk, + MSCC_ANA_ETH1_FLOW_ADDR_MATCH1(0), 0); + } + + val = vsc85xx_ts_read_csr(phydev, blk, MSCC_ANA_ETH1_FLOW_ENA(0)); + val &= ~ETH1_FLOW_ENA; + if (enable) + val |= ETH1_FLOW_ENA; + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_ETH1_FLOW_ENA(0), val); + + return 0; +} + +static int vsc85xx_ip1_conf(struct phy_device *phydev, enum ts_blk blk, + bool enable) +{ + u32 val; + + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_NXT_PROT_IP1_MODE, + ANA_IP1_NXT_PROT_IPV4 | + ANA_IP1_NXT_PROT_FLOW_OFFSET_IPV4); + + /* Matching UDP protocol number */ + val = ANA_IP1_NXT_PROT_IP_MATCH1_PROT_MASK(0xff) | + ANA_IP1_NXT_PROT_IP_MATCH1_PROT_MATCH(IPPROTO_UDP) | + ANA_IP1_NXT_PROT_IP_MATCH1_PROT_OFF(9); + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_NXT_PROT_IP_MATCH1, + val); + + /* End of IP protocol, start of next protocol (UDP) */ + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_NXT_PROT_OFFSET2, + ANA_IP1_NXT_PROT_OFFSET2(20)); + + val = vsc85xx_ts_read_csr(phydev, blk, + MSCC_ANA_IP1_NXT_PROT_UDP_CHKSUM); + val &= ~(IP1_NXT_PROT_UDP_CHKSUM_OFF_MASK | + IP1_NXT_PROT_UDP_CHKSUM_WIDTH_MASK); + val |= IP1_NXT_PROT_UDP_CHKSUM_WIDTH(2); + + val &= ~(IP1_NXT_PROT_UDP_CHKSUM_UPDATE | + IP1_NXT_PROT_UDP_CHKSUM_CLEAR); + /* UDP checksum offset in IPv4 packet + * according to: https://tools.ietf.org/html/rfc768 + */ + val |= IP1_NXT_PROT_UDP_CHKSUM_OFF(26) | IP1_NXT_PROT_UDP_CHKSUM_CLEAR; + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_NXT_PROT_UDP_CHKSUM, + val); + + val = vsc85xx_ts_read_csr(phydev, blk, MSCC_ANA_IP1_FLOW_ENA(0)); + val &= ~(IP1_FLOW_MATCH_ADDR_MASK | IP1_FLOW_ENA); + val |= IP1_FLOW_MATCH_DEST_SRC_ADDR; + if (enable) + val |= IP1_FLOW_ENA; + vsc85xx_ts_write_csr(phydev, blk, MSCC_ANA_IP1_FLOW_ENA(0), val); + + return 0; +} + +static int vsc85xx_ts_engine_init(struct phy_device *phydev, bool one_step) +{ + struct vsc8531_private *vsc8531 = phydev->priv; + bool ptp_l4, base = phydev->mdio.addr == vsc8531->ts_base_addr; + u8 eng_id = base ? 0 : 1; + u32 val; + + ptp_l4 = vsc8531->ptp->rx_filter == HWTSTAMP_FILTER_PTP_V2_L4_EVENT; + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_ANALYZER_MODE); + /* Disable INGRESS and EGRESS so engine eng_id can be reconfigured */ + val &= ~(PTP_ANALYZER_MODE_EGR_ENA(BIT(eng_id)) | + PTP_ANALYZER_MODE_INGR_ENA(BIT(eng_id))); + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_ANALYZER_MODE, + val); + + if (vsc8531->ptp->rx_filter == HWTSTAMP_FILTER_PTP_V2_L2_EVENT) { + vsc85xx_eth1_next_comp(phydev, INGRESS, + ANA_ETH1_NTX_PROT_PTP_OAM, ETH_P_1588); + vsc85xx_eth1_next_comp(phydev, EGRESS, + ANA_ETH1_NTX_PROT_PTP_OAM, ETH_P_1588); + } else { + vsc85xx_eth1_next_comp(phydev, INGRESS, + ANA_ETH1_NTX_PROT_IP_UDP_ACH_1, + ETH_P_IP); + vsc85xx_eth1_next_comp(phydev, EGRESS, + ANA_ETH1_NTX_PROT_IP_UDP_ACH_1, + ETH_P_IP); + /* Header length of IPv[4/6] + UDP */ + vsc85xx_ip1_next_comp(phydev, INGRESS, + ANA_ETH1_NTX_PROT_PTP_OAM, 28); + vsc85xx_ip1_next_comp(phydev, EGRESS, + ANA_ETH1_NTX_PROT_PTP_OAM, 28); + } + + vsc85xx_eth1_conf(phydev, INGRESS, + vsc8531->ptp->rx_filter != HWTSTAMP_FILTER_NONE); + vsc85xx_ip1_conf(phydev, INGRESS, + ptp_l4 && vsc8531->ptp->rx_filter != HWTSTAMP_FILTER_NONE); + vsc85xx_ptp_conf(phydev, INGRESS, one_step, + vsc8531->ptp->rx_filter != HWTSTAMP_FILTER_NONE); + + vsc85xx_eth1_conf(phydev, EGRESS, + vsc8531->ptp->tx_type != HWTSTAMP_TX_OFF); + vsc85xx_ip1_conf(phydev, EGRESS, + ptp_l4 && vsc8531->ptp->tx_type != HWTSTAMP_TX_OFF); + vsc85xx_ptp_conf(phydev, EGRESS, one_step, + vsc8531->ptp->tx_type != HWTSTAMP_TX_OFF); + + val &= ~PTP_ANALYZER_MODE_EGR_ENA(BIT(eng_id)); + if (vsc8531->ptp->tx_type != HWTSTAMP_TX_OFF) + val |= PTP_ANALYZER_MODE_EGR_ENA(BIT(eng_id)); + + val &= ~PTP_ANALYZER_MODE_INGR_ENA(BIT(eng_id)); + if (vsc8531->ptp->rx_filter != HWTSTAMP_FILTER_NONE) + val |= PTP_ANALYZER_MODE_INGR_ENA(BIT(eng_id)); + + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_ANALYZER_MODE, + val); + + return 0; +} + +void vsc85xx_link_change_notify(struct phy_device *phydev) +{ + struct vsc8531_private *priv = phydev->priv; + + mutex_lock(&priv->ts_lock); + vsc85xx_ts_set_latencies(phydev); + mutex_unlock(&priv->ts_lock); +} + +static void vsc85xx_ts_reset_fifo(struct phy_device *phydev) +{ + u32 val; + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_EGR_TS_FIFO_CTRL); + val |= PTP_EGR_TS_FIFO_RESET; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_TS_FIFO_CTRL, + val); + + val &= ~PTP_EGR_TS_FIFO_RESET; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_TS_FIFO_CTRL, + val); +} + +static int vsc85xx_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr) +{ + struct vsc8531_private *vsc8531 = + container_of(mii_ts, struct vsc8531_private, mii_ts); + struct phy_device *phydev = vsc8531->ptp->phydev; + struct hwtstamp_config cfg; + bool one_step = false; + u32 val; + + if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) + return -EFAULT; + + if (cfg.flags) + return -EINVAL; + + switch (cfg.tx_type) { + case HWTSTAMP_TX_ONESTEP_SYNC: + one_step = true; + break; + case HWTSTAMP_TX_ON: + break; + case HWTSTAMP_TX_OFF: + break; + default: + return -ERANGE; + } + + vsc8531->ptp->tx_type = cfg.tx_type; + + switch (cfg.rx_filter) { + case HWTSTAMP_FILTER_NONE: + break; + case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: + /* ETH->IP->UDP->PTP */ + break; + case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: + /* ETH->PTP */ + break; + default: + return -ERANGE; + } + + vsc8531->ptp->rx_filter = cfg.rx_filter; + + mutex_lock(&vsc8531->ts_lock); + + __skb_queue_purge(&vsc8531->ptp->tx_queue); + __skb_queue_head_init(&vsc8531->ptp->tx_queue); + + /* Disable predictor while configuring the 1588 block */ + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_INGR_PREDICTOR); + val &= ~PTP_INGR_PREDICTOR_EN; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_INGR_PREDICTOR, + val); + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_EGR_PREDICTOR); + val &= ~PTP_EGR_PREDICTOR_EN; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_PREDICTOR, + val); + + /* Bypass egress or ingress blocks if timestamping isn't used */ + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_IFACE_CTRL); + val &= ~(PTP_IFACE_CTRL_EGR_BYPASS | PTP_IFACE_CTRL_INGR_BYPASS); + if (vsc8531->ptp->tx_type == HWTSTAMP_TX_OFF) + val |= PTP_IFACE_CTRL_EGR_BYPASS; + if (vsc8531->ptp->rx_filter == HWTSTAMP_FILTER_NONE) + val |= PTP_IFACE_CTRL_INGR_BYPASS; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_IFACE_CTRL, val); + + /* Resetting FIFO so that it's empty after reconfiguration */ + vsc85xx_ts_reset_fifo(phydev); + + vsc85xx_ts_engine_init(phydev, one_step); + + /* Re-enable predictors now */ + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_INGR_PREDICTOR); + val |= PTP_INGR_PREDICTOR_EN; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_INGR_PREDICTOR, + val); + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_EGR_PREDICTOR); + val |= PTP_EGR_PREDICTOR_EN; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_PREDICTOR, + val); + + vsc8531->ptp->configured = 1; + mutex_unlock(&vsc8531->ts_lock); + + return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0; +} + +static int vsc85xx_ts_info(struct mii_timestamper *mii_ts, + struct ethtool_ts_info *info) +{ + struct vsc8531_private *vsc8531 = + container_of(mii_ts, struct vsc8531_private, mii_ts); + + info->phc_index = ptp_clock_index(vsc8531->ptp->ptp_clock); + info->so_timestamping = + SOF_TIMESTAMPING_TX_HARDWARE | + SOF_TIMESTAMPING_RX_HARDWARE | + SOF_TIMESTAMPING_RAW_HARDWARE; + info->tx_types = + (1 << HWTSTAMP_TX_OFF) | + (1 << HWTSTAMP_TX_ON) | + (1 << HWTSTAMP_TX_ONESTEP_SYNC); + info->rx_filters = + (1 << HWTSTAMP_FILTER_NONE) | + (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) | + (1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT); + + return 0; +} + +static void vsc85xx_txtstamp(struct mii_timestamper *mii_ts, + struct sk_buff *skb, int type) +{ + struct vsc8531_private *vsc8531 = + container_of(mii_ts, struct vsc8531_private, mii_ts); + + if (!vsc8531->ptp->configured) + return; + + if (vsc8531->ptp->tx_type == HWTSTAMP_TX_OFF) { + kfree_skb(skb); + return; + } + + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + + mutex_lock(&vsc8531->ts_lock); + __skb_queue_tail(&vsc8531->ptp->tx_queue, skb); + mutex_unlock(&vsc8531->ts_lock); +} + +static bool vsc85xx_rxtstamp(struct mii_timestamper *mii_ts, + struct sk_buff *skb, int type) +{ + struct vsc8531_private *vsc8531 = + container_of(mii_ts, struct vsc8531_private, mii_ts); + struct skb_shared_hwtstamps *shhwtstamps = NULL; + struct vsc85xx_ptphdr *ptphdr; + struct timespec64 ts; + unsigned long ns; + + if (!vsc8531->ptp->configured) + return false; + + if (vsc8531->ptp->rx_filter == HWTSTAMP_FILTER_NONE || + type == PTP_CLASS_NONE) + return false; + + vsc85xx_gettime(&vsc8531->ptp->caps, &ts); + + ptphdr = get_ptp_header_rx(skb, vsc8531->ptp->rx_filter); + if (!ptphdr) + return false; + + shhwtstamps = skb_hwtstamps(skb); + memset(shhwtstamps, 0, sizeof(struct skb_shared_hwtstamps)); + + ns = ntohl(ptphdr->rsrvd2); + + /* nsec is in reserved field */ + if (ts.tv_nsec < ns) + ts.tv_sec--; + + shhwtstamps->hwtstamp = ktime_set(ts.tv_sec, ns); + netif_rx_ni(skb); + + return true; +} + +static const struct ptp_clock_info vsc85xx_clk_caps = { + .owner = THIS_MODULE, + .name = "VSC85xx timer", + .max_adj = S32_MAX, + .n_alarm = 0, + .n_pins = 0, + .n_ext_ts = 0, + .n_per_out = 0, + .pps = 0, + .adjtime = &vsc85xx_adjtime, + .adjfine = &vsc85xx_adjfine, + .gettime64 = &vsc85xx_gettime, + .settime64 = &vsc85xx_settime, +}; + +static struct vsc8531_private *vsc8584_base_priv(struct phy_device *phydev) +{ + struct vsc8531_private *vsc8531 = phydev->priv; + + if (vsc8531->ts_base_addr != phydev->mdio.addr) { + struct mdio_device *dev; + + dev = phydev->mdio.bus->mdio_map[vsc8531->ts_base_addr]; + phydev = container_of(dev, struct phy_device, mdio); + + return phydev->priv; + } + + return vsc8531; +} + +static bool vsc8584_is_1588_input_clk_configured(struct phy_device *phydev) +{ + struct vsc8531_private *vsc8531 = vsc8584_base_priv(phydev); + + return vsc8531->input_clk_init; +} + +static void vsc8584_set_input_clk_configured(struct phy_device *phydev) +{ + struct vsc8531_private *vsc8531 = vsc8584_base_priv(phydev); + + vsc8531->input_clk_init = true; +} + +static int __vsc8584_init_ptp(struct phy_device *phydev) +{ + struct vsc8531_private *vsc8531 = phydev->priv; + u32 ltc_seq_e[] = { 0, 400000, 0, 0, 0 }; + u8 ltc_seq_a[] = { 8, 6, 5, 4, 2 }; + u32 val; + + if (!vsc8584_is_1588_input_clk_configured(phydev)) { + phy_lock_mdio_bus(phydev); + + /* 1588_DIFF_INPUT_CLK configuration: Use an external clock for + * the LTC, as per 3.13.29 in the VSC8584 datasheet. + */ + phy_ts_base_write(phydev, MSCC_EXT_PAGE_ACCESS, + MSCC_PHY_PAGE_1588); + phy_ts_base_write(phydev, 29, 0x7ae0); + phy_ts_base_write(phydev, 30, 0xb71c); + phy_ts_base_write(phydev, MSCC_EXT_PAGE_ACCESS, + MSCC_PHY_PAGE_STANDARD); + + phy_unlock_mdio_bus(phydev); + + vsc8584_set_input_clk_configured(phydev); + } + + /* Disable predictor before configuring the 1588 block */ + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_INGR_PREDICTOR); + val &= ~PTP_INGR_PREDICTOR_EN; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_INGR_PREDICTOR, + val); + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_EGR_PREDICTOR); + val &= ~PTP_EGR_PREDICTOR_EN; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_PREDICTOR, + val); + + /* By default, the internal clock of fixed rate 250MHz is used */ + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_CTRL); + val &= ~PTP_LTC_CTRL_CLK_SEL_MASK; + val |= PTP_LTC_CTRL_CLK_SEL_INTERNAL_250; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_CTRL, val); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_SEQUENCE); + val &= ~PTP_LTC_SEQUENCE_A_MASK; + val |= PTP_LTC_SEQUENCE_A(ltc_seq_a[PHC_CLK_250MHZ]); + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_SEQUENCE, val); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_SEQ); + val &= ~(PTP_LTC_SEQ_ERR_MASK | PTP_LTC_SEQ_ADD_SUB); + if (ltc_seq_e[PHC_CLK_250MHZ]) + val |= PTP_LTC_SEQ_ADD_SUB; + val |= PTP_LTC_SEQ_ERR(ltc_seq_e[PHC_CLK_250MHZ]); + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_SEQ, val); + + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_LTC_1PPS_WIDTH_ADJ, + PPS_WIDTH_ADJ); + + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_INGR_DELAY_FIFO, + IS_ENABLED(CONFIG_MACSEC) ? + PTP_INGR_DELAY_FIFO_DEPTH_MACSEC : + PTP_INGR_DELAY_FIFO_DEPTH_DEFAULT); + + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_DELAY_FIFO, + IS_ENABLED(CONFIG_MACSEC) ? + PTP_EGR_DELAY_FIFO_DEPTH_MACSEC : + PTP_EGR_DELAY_FIFO_DEPTH_DEFAULT); + + /* Enable n-phase sampler for Viper Rev-B */ + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_ACCUR_CFG_STATUS); + val &= ~(PTP_ACCUR_PPS_OUT_BYPASS | PTP_ACCUR_PPS_IN_BYPASS | + PTP_ACCUR_EGR_SOF_BYPASS | PTP_ACCUR_INGR_SOF_BYPASS | + PTP_ACCUR_LOAD_SAVE_BYPASS); + val |= PTP_ACCUR_PPS_OUT_CALIB_ERR | PTP_ACCUR_PPS_OUT_CALIB_DONE | + PTP_ACCUR_PPS_IN_CALIB_ERR | PTP_ACCUR_PPS_IN_CALIB_DONE | + PTP_ACCUR_EGR_SOF_CALIB_ERR | PTP_ACCUR_EGR_SOF_CALIB_DONE | + PTP_ACCUR_INGR_SOF_CALIB_ERR | PTP_ACCUR_INGR_SOF_CALIB_DONE | + PTP_ACCUR_LOAD_SAVE_CALIB_ERR | PTP_ACCUR_LOAD_SAVE_CALIB_DONE; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_ACCUR_CFG_STATUS, + val); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_ACCUR_CFG_STATUS); + val |= PTP_ACCUR_CALIB_TRIGG; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_ACCUR_CFG_STATUS, + val); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_ACCUR_CFG_STATUS); + val &= ~PTP_ACCUR_CALIB_TRIGG; + val |= PTP_ACCUR_PPS_OUT_CALIB_ERR | PTP_ACCUR_PPS_OUT_CALIB_DONE | + PTP_ACCUR_PPS_IN_CALIB_ERR | PTP_ACCUR_PPS_IN_CALIB_DONE | + PTP_ACCUR_EGR_SOF_CALIB_ERR | PTP_ACCUR_EGR_SOF_CALIB_DONE | + PTP_ACCUR_INGR_SOF_CALIB_ERR | PTP_ACCUR_INGR_SOF_CALIB_DONE | + PTP_ACCUR_LOAD_SAVE_CALIB_ERR | PTP_ACCUR_LOAD_SAVE_CALIB_DONE; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_ACCUR_CFG_STATUS, + val); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_ACCUR_CFG_STATUS); + val |= PTP_ACCUR_CALIB_TRIGG; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_ACCUR_CFG_STATUS, + val); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_ACCUR_CFG_STATUS); + val &= ~PTP_ACCUR_CALIB_TRIGG; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_ACCUR_CFG_STATUS, + val); + + /* Do not access FIFO via SI */ + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_TSTAMP_FIFO_SI); + val &= ~PTP_TSTAMP_FIFO_SI_EN; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_TSTAMP_FIFO_SI, + val); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_INGR_REWRITER_CTRL); + val &= ~PTP_INGR_REWRITER_REDUCE_PREAMBLE; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_INGR_REWRITER_CTRL, + val); + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_EGR_REWRITER_CTRL); + val &= ~PTP_EGR_REWRITER_REDUCE_PREAMBLE; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_REWRITER_CTRL, + val); + + /* Put the flag that indicates the frame has been modified to bit 7 */ + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_INGR_REWRITER_CTRL); + val |= PTP_INGR_REWRITER_FLAG_BIT_OFF(7) | PTP_INGR_REWRITER_FLAG_VAL; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_INGR_REWRITER_CTRL, + val); + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_EGR_REWRITER_CTRL); + val |= PTP_EGR_REWRITER_FLAG_BIT_OFF(7); + val &= ~PTP_EGR_REWRITER_FLAG_VAL; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_REWRITER_CTRL, + val); + + /* 30bit mode for RX timestamp, only the nanoseconds are kept in + * reserved field. + */ + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_INGR_TSP_CTRL); + val |= PHY_PTP_INGR_TSP_CTRL_FRACT_NS; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_INGR_TSP_CTRL, + val); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_TSP_CTRL); + val |= PHY_PTP_EGR_TSP_CTRL_FRACT_NS; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_TSP_CTRL, val); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_SERIAL_TOD_IFACE); + val |= PTP_SERIAL_TOD_IFACE_LS_AUTO_CLR; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_SERIAL_TOD_IFACE, + val); + + vsc85xx_ts_fsb_init(phydev); + + /* Set the Egress timestamp FIFO configuration and status register */ + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_EGR_TS_FIFO_CTRL); + val &= ~(PTP_EGR_TS_FIFO_SIG_BYTES_MASK | PTP_EGR_TS_FIFO_THRESH_MASK); + /* 16 bytes for the signature, 10 for the timestamp in the TS FIFO */ + val |= PTP_EGR_TS_FIFO_SIG_BYTES(16) | PTP_EGR_TS_FIFO_THRESH(7); + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_EGR_TS_FIFO_CTRL, + val); + + vsc85xx_ts_reset_fifo(phydev); + + val = PTP_IFACE_CTRL_CLK_ENA; + if (!IS_ENABLED(CONFIG_MACSEC)) + val |= PTP_IFACE_CTRL_GMII_PROT; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_IFACE_CTRL, val); + + vsc85xx_ts_set_latencies(phydev); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_VERSION_CODE); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, MSCC_PHY_PTP_IFACE_CTRL); + val |= PTP_IFACE_CTRL_EGR_BYPASS; + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_IFACE_CTRL, val); + + vsc85xx_ts_disable_flows(phydev, EGRESS); + vsc85xx_ts_disable_flows(phydev, INGRESS); + + val = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_PTP_ANALYZER_MODE); + /* Disable INGRESS and EGRESS so engine eng_id can be reconfigured */ + val &= ~(PTP_ANALYZER_MODE_EGR_ENA_MASK | + PTP_ANALYZER_MODE_INGR_ENA_MASK | + PTP_ANA_INGR_ENCAP_FLOW_MODE_MASK | + PTP_ANA_EGR_ENCAP_FLOW_MODE_MASK); + /* Strict matching in flow (packets should match flows from the same + * index in all enabled comparators (except PTP)). + */ + val |= PTP_ANA_SPLIT_ENCAP_FLOW | PTP_ANA_INGR_ENCAP_FLOW_MODE(0x7) | + PTP_ANA_EGR_ENCAP_FLOW_MODE(0x7); + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_PTP_ANALYZER_MODE, + val); + + /* Initialized for ingress and egress flows: + * - The Ethernet comparator. + * - The IP comparator. + * - The PTP comparator. + */ + vsc85xx_eth_cmp1_init(phydev, INGRESS); + vsc85xx_ip_cmp1_init(phydev, INGRESS); + vsc85xx_ptp_cmp_init(phydev, INGRESS); + vsc85xx_eth_cmp1_init(phydev, EGRESS); + vsc85xx_ip_cmp1_init(phydev, EGRESS); + vsc85xx_ptp_cmp_init(phydev, EGRESS); + + vsc85xx_ts_eth_cmp1_sig(phydev); + + vsc8531->mii_ts.rxtstamp = vsc85xx_rxtstamp; + vsc8531->mii_ts.txtstamp = vsc85xx_txtstamp; + vsc8531->mii_ts.hwtstamp = vsc85xx_hwtstamp; + vsc8531->mii_ts.ts_info = vsc85xx_ts_info; + phydev->mii_ts = &vsc8531->mii_ts; + + memcpy(&vsc8531->ptp->caps, &vsc85xx_clk_caps, sizeof(vsc85xx_clk_caps)); + + vsc8531->ptp->ptp_clock = ptp_clock_register(&vsc8531->ptp->caps, + &phydev->mdio.dev); + return PTR_ERR_OR_ZERO(vsc8531->ptp->ptp_clock); +} + +void vsc8584_config_ts_intr(struct phy_device *phydev) +{ + struct vsc8531_private *priv = phydev->priv; + + mutex_lock(&priv->ts_lock); + vsc85xx_ts_write_csr(phydev, PROCESSOR, MSCC_PHY_1588_VSC85XX_INT_MASK, + VSC85XX_1588_INT_MASK_MASK); + mutex_unlock(&priv->ts_lock); +} + +int vsc8584_ptp_init(struct phy_device *phydev) +{ + switch (phydev->phy_id & phydev->drv->phy_id_mask) { + case PHY_ID_VSC8575: + case PHY_ID_VSC8582: + case PHY_ID_VSC8584: + return __vsc8584_init_ptp(phydev); + } + + return 0; +} + +irqreturn_t vsc8584_handle_ts_interrupt(struct phy_device *phydev) +{ + struct vsc8531_private *priv = phydev->priv; + int rc; + + mutex_lock(&priv->ts_lock); + rc = vsc85xx_ts_read_csr(phydev, PROCESSOR, + MSCC_PHY_1588_VSC85XX_INT_STATUS); + /* Ack the PTP interrupt */ + vsc85xx_ts_write_csr(phydev, PROCESSOR, + MSCC_PHY_1588_VSC85XX_INT_STATUS, rc); + + if (!(rc & VSC85XX_1588_INT_MASK_MASK)) { + mutex_unlock(&priv->ts_lock); + return IRQ_NONE; + } + + if (rc & VSC85XX_1588_INT_FIFO_ADD) { + vsc85xx_get_tx_ts(priv->ptp); + } else if (rc & VSC85XX_1588_INT_FIFO_OVERFLOW) { + __skb_queue_purge(&priv->ptp->tx_queue); + vsc85xx_ts_reset_fifo(phydev); + } + + mutex_unlock(&priv->ts_lock); + return IRQ_HANDLED; +} + +int vsc8584_ptp_probe(struct phy_device *phydev) +{ + struct vsc8531_private *vsc8531 = phydev->priv; + + vsc8531->ptp = devm_kzalloc(&phydev->mdio.dev, sizeof(*vsc8531->ptp), + GFP_KERNEL); + if (!vsc8531->ptp) + return -ENOMEM; + + mutex_init(&vsc8531->phc_lock); + mutex_init(&vsc8531->ts_lock); + + /* Retrieve the shared load/save GPIO. Request it as non exclusive as + * the same GPIO can be requested by all the PHYs of the same package. + * This GPIO must be used with the gpio_lock taken (the lock is shared + * between all PHYs). + */ + vsc8531->load_save = devm_gpiod_get_optional(&phydev->mdio.dev, "load-save", + GPIOD_FLAGS_BIT_NONEXCLUSIVE | + GPIOD_OUT_LOW); + if (IS_ERR(vsc8531->load_save)) { + phydev_err(phydev, "Can't get load-save GPIO (%ld)\n", + PTR_ERR(vsc8531->load_save)); + return PTR_ERR(vsc8531->load_save); + } + + vsc8531->ptp->phydev = phydev; + + return 0; +} + +int vsc8584_ptp_probe_once(struct phy_device *phydev) +{ + struct vsc85xx_shared_private *shared = + (struct vsc85xx_shared_private *)phydev->shared->priv; + + /* Initialize shared GPIO lock */ + mutex_init(&shared->gpio_lock); + + return 0; +} |