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Message-ID: <20241104090750.12942-2-divya.koppera@microchip.com>
Date: Mon, 4 Nov 2024 14:37:46 +0530
From: Divya Koppera <divya.koppera@...rochip.com>
To: <andrew@...n.ch>, <arun.ramadoss@...rochip.com>,
<UNGLinuxDriver@...rochip.com>, <hkallweit1@...il.com>,
<linux@...linux.org.uk>, <davem@...emloft.net>, <edumazet@...gle.com>,
<kuba@...nel.org>, <pabeni@...hat.com>, <netdev@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <richardcochran@...il.com>
Subject: [PATCH net-next 1/5] net: phy: microchip_ptp : Add header file for Microchip ptp library
This ptp header file library will cover ptp macros for future phys in Microchip
where addresses will be same but base offset and mmd address may changes.
Signed-off-by: Divya Koppera <divya.koppera@...rochip.com>
---
drivers/net/phy/microchip_ptp.h | 217 ++++++++++++++++++++++++++++++++
1 file changed, 217 insertions(+)
create mode 100644 drivers/net/phy/microchip_ptp.h
diff --git a/drivers/net/phy/microchip_ptp.h b/drivers/net/phy/microchip_ptp.h
new file mode 100644
index 000000000000..617418bf9abb
--- /dev/null
+++ b/drivers/net/phy/microchip_ptp.h
@@ -0,0 +1,217 @@
+/* SPDX-License-Identifier: GPL-2.0
+ * Copyright (C) 2024 Microchip Technology
+ */
+
+#ifndef _MICROCHIP_PTP_H
+#define _MICROCHIP_PTP_H
+
+#ifdef CONFIG_NETWORK_PHY_TIMESTAMPING
+
+#include <linux/ptp_clock_kernel.h>
+#include <linux/ptp_clock.h>
+#include <linux/ptp_classify.h>
+#include <linux/net_tstamp.h>
+#include <linux/mii.h>
+#include <linux/phy.h>
+
+#define MCHP_PTP_CMD_CTL(b) ((b) + 0x0)
+#define MCHP_PTP_CMD_CTL_LTC_STEP_NSEC BIT(6)
+#define MCHP_PTP_CMD_CTL_LTC_STEP_SEC BIT(5)
+#define MCHP_PTP_CMD_CTL_CLOCK_LOAD BIT(4)
+#define MCHP_PTP_CMD_CTL_CLOCK_READ BIT(3)
+#define MCHP_PTP_CMD_CTL_EN BIT(1)
+#define MCHP_PTP_CMD_CTL_DIS BIT(0)
+
+#define MCHP_PTP_REF_CLK_CFG(b) ((b) + 0x2)
+#define MCHP_PTP_REF_CLK_SRC_250MHZ 0x0
+#define MCHP_PTP_REF_CLK_PERIOD_OVERRIDE BIT(9)
+#define MCHP_PTP_REF_CLK_PERIOD 4
+#define MCHP_PTP_REF_CLK_CFG_SET (MCHP_PTP_REF_CLK_SRC_250MHZ |\
+ MCHP_PTP_REF_CLK_PERIOD_OVERRIDE |\
+ MCHP_PTP_REF_CLK_PERIOD)
+
+#define MCHP_PTP_LTC_SEC_HI(b) ((b) + 0x5)
+#define MCHP_PTP_LTC_SEC_MID(b) ((b) + 0x6)
+#define MCHP_PTP_LTC_SEC_LO(b) ((b) + 0x7)
+#define MCHP_PTP_LTC_NS_HI(b) ((b) + 0x8)
+#define MCHP_PTP_LTC_NS_LO(b) ((b) + 0x9)
+#define MCHP_PTP_LTC_RATE_ADJ_HI(b) ((b) + 0xc)
+#define MCHP_PTP_LTC_RATE_ADJ_HI_DIR BIT(15)
+#define MCHP_PTP_LTC_RATE_ADJ_LO(b) ((b) + 0xd)
+#define MCHP_PTP_LTC_STEP_ADJ_HI(b) ((b) + 0x12)
+#define MCHP_PTP_LTC_STEP_ADJ_HI_DIR BIT(15)
+#define MCHP_PTP_LTC_STEP_ADJ_LO(b) ((b) + 0x13)
+#define MCHP_PTP_LTC_READ_SEC_HI(b) ((b) + 0x29)
+#define MCHP_PTP_LTC_READ_SEC_MID(b) ((b) + 0x2a)
+#define MCHP_PTP_LTC_READ_SEC_LO(b) ((b) + 0x2b)
+#define MCHP_PTP_LTC_READ_NS_HI(b) ((b) + 0x2c)
+#define MCHP_PTP_LTC_READ_NS_LO(b) ((b) + 0x2d)
+#define MCHP_PTP_OP_MODE(b) ((b) + 0x41)
+#define MCHP_PTP_OP_MODE_DIS 0
+#define MCHP_PTP_OP_MODE_STANDALONE 1
+#define MCHP_PTP_LATENCY_CORRECTION_CTL(b) ((b) + 0x44)
+#define MCHP_PTP_PREDICTOR_EN BIT(6)
+#define MCHP_PTP_TX_PRED_DIS BIT(1)
+#define MCHP_PTP_RX_PRED_DIS BIT(0)
+#define MCHP_PTP_LATENCY_SETTING (MCHP_PTP_PREDICTOR_EN | \
+ MCHP_PTP_TX_PRED_DIS | \
+ MCHP_PTP_RX_PRED_DIS)
+
+#define MCHP_PTP_INT_EN(b) ((b) + 0x0)
+#define MCHP_PTP_INT_STS(b) ((b) + 0x01)
+#define MCHP_PTP_INT_TX_TS_OVRFL_EN BIT(3)
+#define MCHP_PTP_INT_TX_TS_EN BIT(2)
+#define MCHP_PTP_INT_RX_TS_OVRFL_EN BIT(1)
+#define MCHP_PTP_INT_RX_TS_EN BIT(0)
+#define MCHP_PTP_INT_ALL_MSK (MCHP_PTP_INT_TX_TS_OVRFL_EN | \
+ MCHP_PTP_INT_TX_TS_EN | \
+ MCHP_PTP_INT_RX_TS_OVRFL_EN |\
+ MCHP_PTP_INT_RX_TS_EN)
+
+#define MCHP_PTP_CAP_INFO(b) ((b) + 0x2e)
+#define MCHP_PTP_TX_TS_CNT(v) (((v) & GENMASK(11, 8)) >> 8)
+#define MCHP_PTP_RX_TS_CNT(v) ((v) & GENMASK(3, 0))
+
+#define MCHP_PTP_RX_PARSE_CONFIG(b) ((b) + 0x42)
+#define MCHP_PTP_RX_PARSE_L2_ADDR_EN(b) ((b) + 0x44)
+#define MCHP_PTP_RX_PARSE_IPV4_ADDR_EN(b) ((b) + 0x45)
+
+#define MCHP_PTP_RX_TIMESTAMP_CONFIG(b) ((b) + 0x4e)
+#define MCHP_PTP_RX_TIMESTAMP_CONFIG_PTP_FCS_DIS BIT(0)
+
+#define MCHP_PTP_RX_VERSION(b) ((b) + 0x48)
+#define MCHP_PTP_RX_TIMESTAMP_EN(b) ((b) + 0x4d)
+
+#define MCHP_PTP_RX_INGRESS_NS_HI(b) ((b) + 0x54)
+#define MCHP_PTP_RX_INGRESS_NS_HI_TS_VALID BIT(15)
+
+#define MCHP_PTP_RX_INGRESS_NS_LO(b) ((b) + 0x55)
+#define MCHP_PTP_RX_INGRESS_SEC_HI(b) ((b) + 0x56)
+#define MCHP_PTP_RX_INGRESS_SEC_LO(b) ((b) + 0x57)
+#define MCHP_PTP_RX_MSG_HEADER2(b) ((b) + 0x59)
+
+#define MCHP_PTP_TX_PARSE_CONFIG(b) ((b) + 0x82)
+#define MCHP_PTP_PARSE_CONFIG_LAYER2_EN BIT(0)
+#define MCHP_PTP_PARSE_CONFIG_IPV4_EN BIT(1)
+#define MCHP_PTP_PARSE_CONFIG_IPV6_EN BIT(2)
+
+#define MCHP_PTP_TX_PARSE_L2_ADDR_EN(b) ((b) + 0x84)
+#define MCHP_PTP_TX_PARSE_IPV4_ADDR_EN(b) ((b) + 0x85)
+
+#define MCHP_PTP_TX_VERSION(b) ((b) + 0x88)
+#define MCHP_PTP_MAX_VERSION(x) (((x) & GENMASK(7, 0)) << 8)
+#define MCHP_PTP_MIN_VERSION(x) ((x) & GENMASK(7, 0))
+
+#define MCHP_PTP_TX_TIMESTAMP_EN(b) ((b) + 0x8d)
+#define MCHP_PTP_TIMESTAMP_EN_SYNC BIT(0)
+#define MCHP_PTP_TIMESTAMP_EN_DREQ BIT(1)
+#define MCHP_PTP_TIMESTAMP_EN_PDREQ BIT(2)
+#define MCHP_PTP_TIMESTAMP_EN_PDRES BIT(3)
+#define MCHP_PTP_TIMESTAMP_EN_ALL (MCHP_PTP_TIMESTAMP_EN_SYNC |\
+ MCHP_PTP_TIMESTAMP_EN_DREQ |\
+ MCHP_PTP_TIMESTAMP_EN_PDREQ |\
+ MCHP_PTP_TIMESTAMP_EN_PDRES)
+
+#define MCHP_PTP_TX_TIMESTAMP_CONFIG(b) ((b) + 0x8e)
+#define MCHP_PTP_TX_TIMESTAMP_CONFIG_PTP_FCS_DIS BIT(0)
+
+#define MCHP_PTP_TX_MOD(b) ((b) + 0x8f)
+#define MCHP_PTP_TX_MOD_PTP_SYNC_TS_INSERT BIT(12)
+#define MCHP_PTP_TX_MOD_PTP_FU_TS_INSERT BIT(11)
+
+#define MCHP_PTP_TX_EGRESS_NS_HI(b) ((b) + 0x94)
+#define MCHP_PTP_TX_EGRESS_NS_HI_TS_VALID BIT(15)
+
+#define MCHP_PTP_TX_EGRESS_NS_LO(b) ((b) + 0x95)
+#define MCHP_PTP_TX_EGRESS_SEC_HI(b) ((b) + 0x96)
+#define MCHP_PTP_TX_EGRESS_SEC_LO(b) ((b) + 0x97)
+#define MCHP_PTP_TX_MSG_HEADER2(b) ((b) + 0x99)
+
+#define MCHP_PTP_TSU_GEN_CONFIG(b) ((b) + 0xc0)
+#define MCHP_PTP_TSU_GEN_CFG_TSU_EN BIT(0)
+
+#define MCHP_PTP_TSU_HARD_RESET(b) ((b) + 0xc1)
+#define MCHP_PTP_TSU_HARDRESET BIT(0)
+
+/* Represents 1ppm adjustment in 2^32 format with
+ * each nsec contains 4 clock cycles in 250MHz.
+ * The value is calculated as following: (1/1000000)/((2^-32)/4)
+ */
+#define MCHP_PTP_1PPM_FORMAT 17179
+#define MCHP_PTP_FIFO_SIZE 8
+#define MCHP_PTP_MAX_ADJ 31249999
+
+#define BASE_CLK(p) ((p)->clk_base_addr)
+#define BASE_PORT(p) ((p)->port_base_addr)
+#define PTP_MMD(p) ((p)->mmd)
+
+enum ptp_fifo_dir {
+ PTP_INGRESS_FIFO,
+ PTP_EGRESS_FIFO
+};
+
+struct mchp_ptp_clock {
+ struct mii_timestamper mii_ts;
+ struct phy_device *phydev;
+
+ struct sk_buff_head tx_queue;
+ struct sk_buff_head rx_queue;
+
+ struct list_head rx_ts_list;
+ /* Lock for Rx ts fifo */
+ spinlock_t rx_ts_lock;
+
+ int hwts_tx_type;
+ enum hwtstamp_rx_filters rx_filter;
+ int layer;
+ int version;
+
+ struct ptp_clock *ptp_clock;
+ struct ptp_clock_info caps;
+
+ /* Lock for phc */
+ struct mutex ptp_lock;
+
+ u16 port_base_addr;
+ u16 clk_base_addr;
+ u8 mmd;
+};
+
+struct mchp_ptp_rx_ts {
+ struct list_head list;
+ u32 seconds;
+ u32 nsec;
+ u16 seq_id;
+};
+
+struct mchp_ptp_clock *mchp_ptp_probe(struct phy_device *phydev, u8 mmd,
+ u16 clk_base, u16 port_base);
+
+int mchp_config_ptp_intr(struct mchp_ptp_clock *ptp_clock,
+ u16 reg, u16 val, bool enable);
+
+irqreturn_t mchp_ptp_handle_interrupt(struct mchp_ptp_clock *ptp_clock);
+
+#else
+
+static inline struct mchp_ptp_clock *mchp_ptp_probe(struct phy_device *phydev,
+ u8 mmd, u16 clk_base,
+ u16 port_base)
+{
+ return 0;
+}
+
+static inline int mchp_config_ptp_intr(struct mchp_ptp_clock *ptp_clock,
+ u16 reg, u16 val, bool enable)
+{
+ return 0;
+}
+
+static inline irqreturn_t mchp_ptp_handle_interrupt(struct mchp_ptp_clock *ptp_clock)
+{
+ return IRQ_NONE;
+}
+
+#endif //CONFIG_NETWORK_PHY_TIMESTAMPING
+
+#endif //_MICROCHIP_PTP_H
--
2.17.1
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