209 lines
7.7 KiB
C
209 lines
7.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2010 OMICRON electronics GmbH
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* Copyright 2018 NXP
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*/
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#ifndef __PTP_QORIQ_H__
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#define __PTP_QORIQ_H__
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#include <linux/io.h>
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#include <linux/interrupt.h>
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#include <linux/ptp_clock_kernel.h>
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/*
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* qoriq ptp registers
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*/
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struct ctrl_regs {
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u32 tmr_ctrl; /* Timer control register */
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u32 tmr_tevent; /* Timestamp event register */
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u32 tmr_temask; /* Timer event mask register */
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u32 tmr_pevent; /* Timestamp event register */
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u32 tmr_pemask; /* Timer event mask register */
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u32 tmr_stat; /* Timestamp status register */
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u32 tmr_cnt_h; /* Timer counter high register */
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u32 tmr_cnt_l; /* Timer counter low register */
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u32 tmr_add; /* Timer drift compensation addend register */
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u32 tmr_acc; /* Timer accumulator register */
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u32 tmr_prsc; /* Timer prescale */
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u8 res1[4];
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u32 tmroff_h; /* Timer offset high */
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u32 tmroff_l; /* Timer offset low */
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};
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struct alarm_regs {
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u32 tmr_alarm1_h; /* Timer alarm 1 high register */
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u32 tmr_alarm1_l; /* Timer alarm 1 high register */
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u32 tmr_alarm2_h; /* Timer alarm 2 high register */
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u32 tmr_alarm2_l; /* Timer alarm 2 high register */
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};
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struct fiper_regs {
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u32 tmr_fiper1; /* Timer fixed period interval */
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u32 tmr_fiper2; /* Timer fixed period interval */
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u32 tmr_fiper3; /* Timer fixed period interval */
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};
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struct etts_regs {
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u32 tmr_etts1_h; /* Timestamp of general purpose external trigger */
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u32 tmr_etts1_l; /* Timestamp of general purpose external trigger */
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u32 tmr_etts2_h; /* Timestamp of general purpose external trigger */
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u32 tmr_etts2_l; /* Timestamp of general purpose external trigger */
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};
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struct ptp_qoriq_registers {
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struct ctrl_regs __iomem *ctrl_regs;
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struct alarm_regs __iomem *alarm_regs;
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struct fiper_regs __iomem *fiper_regs;
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struct etts_regs __iomem *etts_regs;
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};
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/* Offset definitions for the four register groups */
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#define ETSEC_CTRL_REGS_OFFSET 0x0
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#define ETSEC_ALARM_REGS_OFFSET 0x40
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#define ETSEC_FIPER_REGS_OFFSET 0x80
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#define ETSEC_ETTS_REGS_OFFSET 0xa0
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#define CTRL_REGS_OFFSET 0x80
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#define ALARM_REGS_OFFSET 0xb8
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#define FIPER_REGS_OFFSET 0xd0
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#define ETTS_REGS_OFFSET 0xe0
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/* Bit definitions for the TMR_CTRL register */
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#define ALM1P (1<<31) /* Alarm1 output polarity */
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#define ALM2P (1<<30) /* Alarm2 output polarity */
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#define FIPERST (1<<28) /* FIPER start indication */
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#define PP1L (1<<27) /* Fiper1 pulse loopback mode enabled. */
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#define PP2L (1<<26) /* Fiper2 pulse loopback mode enabled. */
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#define TCLK_PERIOD_SHIFT (16) /* 1588 timer reference clock period. */
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#define TCLK_PERIOD_MASK (0x3ff)
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#define RTPE (1<<15) /* Record Tx Timestamp to PAL Enable. */
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#define FRD (1<<14) /* FIPER Realignment Disable */
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#define ESFDP (1<<11) /* External Tx/Rx SFD Polarity. */
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#define ESFDE (1<<10) /* External Tx/Rx SFD Enable. */
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#define ETEP2 (1<<9) /* External trigger 2 edge polarity */
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#define ETEP1 (1<<8) /* External trigger 1 edge polarity */
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#define COPH (1<<7) /* Generated clock output phase. */
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#define CIPH (1<<6) /* External oscillator input clock phase */
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#define TMSR (1<<5) /* Timer soft reset. */
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#define BYP (1<<3) /* Bypass drift compensated clock */
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#define TE (1<<2) /* 1588 timer enable. */
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#define CKSEL_SHIFT (0) /* 1588 Timer reference clock source */
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#define CKSEL_MASK (0x3)
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/* Bit definitions for the TMR_TEVENT register */
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#define ETS2 (1<<25) /* External trigger 2 timestamp sampled */
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#define ETS1 (1<<24) /* External trigger 1 timestamp sampled */
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#define ALM2 (1<<17) /* Current time = alarm time register 2 */
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#define ALM1 (1<<16) /* Current time = alarm time register 1 */
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#define PP1 (1<<7) /* periodic pulse generated on FIPER1 */
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#define PP2 (1<<6) /* periodic pulse generated on FIPER2 */
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#define PP3 (1<<5) /* periodic pulse generated on FIPER3 */
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/* Bit definitions for the TMR_TEMASK register */
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#define ETS2EN (1<<25) /* External trigger 2 timestamp enable */
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#define ETS1EN (1<<24) /* External trigger 1 timestamp enable */
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#define ALM2EN (1<<17) /* Timer ALM2 event enable */
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#define ALM1EN (1<<16) /* Timer ALM1 event enable */
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#define PP1EN (1<<7) /* Periodic pulse event 1 enable */
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#define PP2EN (1<<6) /* Periodic pulse event 2 enable */
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/* Bit definitions for the TMR_PEVENT register */
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#define TXP2 (1<<9) /* PTP transmitted timestamp im TXTS2 */
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#define TXP1 (1<<8) /* PTP transmitted timestamp in TXTS1 */
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#define RXP (1<<0) /* PTP frame has been received */
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/* Bit definitions for the TMR_PEMASK register */
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#define TXP2EN (1<<9) /* Transmit PTP packet event 2 enable */
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#define TXP1EN (1<<8) /* Transmit PTP packet event 1 enable */
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#define RXPEN (1<<0) /* Receive PTP packet event enable */
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/* Bit definitions for the TMR_STAT register */
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#define STAT_VEC_SHIFT (0) /* Timer general purpose status vector */
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#define STAT_VEC_MASK (0x3f)
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#define ETS1_VLD (1<<24)
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#define ETS2_VLD (1<<25)
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/* Bit definitions for the TMR_PRSC register */
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#define PRSC_OCK_SHIFT (0) /* Output clock division/prescale factor. */
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#define PRSC_OCK_MASK (0xffff)
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#define DRIVER "ptp_qoriq"
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#define N_EXT_TS 2
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#define DEFAULT_CKSEL 1
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#define DEFAULT_TMR_PRSC 2
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#define DEFAULT_FIPER1_PERIOD 1000000000
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#define DEFAULT_FIPER2_PERIOD 1000000000
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#define DEFAULT_FIPER3_PERIOD 1000000000
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struct ptp_qoriq {
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void __iomem *base;
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struct ptp_qoriq_registers regs;
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spinlock_t lock; /* protects regs */
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struct ptp_clock *clock;
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struct ptp_clock_info caps;
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struct resource *rsrc;
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struct dentry *debugfs_root;
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struct device *dev;
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bool extts_fifo_support;
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bool fiper3_support;
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bool etsec;
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int irq;
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int phc_index;
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u32 tclk_period; /* nanoseconds */
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u32 tmr_prsc;
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u32 tmr_add;
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u32 cksel;
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u32 tmr_fiper1;
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u32 tmr_fiper2;
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u32 tmr_fiper3;
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u32 (*read)(unsigned __iomem *addr);
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void (*write)(unsigned __iomem *addr, u32 val);
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};
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static inline u32 qoriq_read_be(unsigned __iomem *addr)
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{
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return ioread32be(addr);
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}
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static inline void qoriq_write_be(unsigned __iomem *addr, u32 val)
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{
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iowrite32be(val, addr);
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}
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static inline u32 qoriq_read_le(unsigned __iomem *addr)
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{
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return ioread32(addr);
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}
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static inline void qoriq_write_le(unsigned __iomem *addr, u32 val)
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{
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iowrite32(val, addr);
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}
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irqreturn_t ptp_qoriq_isr(int irq, void *priv);
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int ptp_qoriq_init(struct ptp_qoriq *ptp_qoriq, void __iomem *base,
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const struct ptp_clock_info *caps);
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void ptp_qoriq_free(struct ptp_qoriq *ptp_qoriq);
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int ptp_qoriq_adjfine(struct ptp_clock_info *ptp, long scaled_ppm);
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int ptp_qoriq_adjtime(struct ptp_clock_info *ptp, s64 delta);
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int ptp_qoriq_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts);
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int ptp_qoriq_settime(struct ptp_clock_info *ptp,
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const struct timespec64 *ts);
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int ptp_qoriq_enable(struct ptp_clock_info *ptp,
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struct ptp_clock_request *rq, int on);
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int extts_clean_up(struct ptp_qoriq *ptp_qoriq, int index, bool update_event);
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#ifdef CONFIG_DEBUG_FS
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void ptp_qoriq_create_debugfs(struct ptp_qoriq *ptp_qoriq);
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void ptp_qoriq_remove_debugfs(struct ptp_qoriq *ptp_qoriq);
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#else
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static inline void ptp_qoriq_create_debugfs(struct ptp_qoriq *ptp_qoriq)
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{ }
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static inline void ptp_qoriq_remove_debugfs(struct ptp_qoriq *ptp_qoriq)
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{ }
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#endif
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#endif
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