/* SPDX-License-Identifier: GPL-2.0+ */
/*
* PTP hardware clock driver for the IDT 82P33XXX family of clocks.
*
* Copyright (C) 2019 Integrated Device Technology, Inc., a Renesas Company.
*/
#ifndef PTP_IDT82P33_H
#define PTP_IDT82P33_H
#include <linux/ktime.h>
#include <linux/mfd/idt82p33_reg.h>
#include <linux/regmap.h>
#define FW_FILENAME "idt82p33xxx.bin"
#define MAX_PHC_PLL (2)
#define MAX_TRIG_CLK (3)
#define MAX_PER_OUT (11)
#define TOD_BYTE_COUNT (10)
#define DCO_MAX_PPB (92000)
#define MAX_MEASURMENT_COUNT (5)
#define SNAP_THRESHOLD_NS (10000)
#define IMMEDIATE_SNAP_THRESHOLD_NS (50000)
#define DDCO_THRESHOLD_NS (5)
#define IDT82P33_MAX_WRITE_COUNT (512)
#define PLLMASK_ADDR_HI 0xFF
#define PLLMASK_ADDR_LO 0xA5
#define PLL0_OUTMASK_ADDR_HI 0xFF
#define PLL0_OUTMASK_ADDR_LO 0xB0
#define PLL1_OUTMASK_ADDR_HI 0xFF
#define PLL1_OUTMASK_ADDR_LO 0xB2
#define PLL2_OUTMASK_ADDR_HI 0xFF
#define PLL2_OUTMASK_ADDR_LO 0xB4
#define PLL3_OUTMASK_ADDR_HI 0xFF
#define PLL3_OUTMASK_ADDR_LO 0xB6
#define DEFAULT_PLL_MASK (0x01)
#define DEFAULT_OUTPUT_MASK_PLL0 (0xc0)
#define DEFAULT_OUTPUT_MASK_PLL1 DEFAULT_OUTPUT_MASK_PLL0
/**
* @brief Maximum absolute value for write phase offset in nanoseconds
*/
#define WRITE_PHASE_OFFSET_LIMIT (20000l)
/** @brief Phase offset resolution
*
* DPLL phase offset = 10^15 fs / ( System Clock * 2^13)
* = 10^15 fs / ( 1638400000 * 2^23)
* = 74.5058059692382 fs
*/
#define IDT_T0DPLL_PHASE_RESOL 74506
/* PTP Hardware Clock interface */
struct idt82p33_channel {
struct ptp_clock_info caps;
struct ptp_clock *ptp_clock;
struct idt82p33 *idt82p33;
enum pll_mode pll_mode;
/* Workaround for TOD-to-output alignment issue */
struct delayed_work adjtime_work;
s32 current_freq;
/* double dco mode */
bool ddco;
u8 output_mask;
/* last input trigger for extts */
u8 tod_trigger;
bool discard_next_extts;
u8 plln;
/* remember last tod_sts for extts */
u8 extts_tod_sts[TOD_BYTE_COUNT];
u16 dpll_tod_cnfg;
u16 dpll_tod_trigger;
u16 dpll_tod_sts;
u16 dpll_mode_cnfg;
u16 dpll_freq_cnfg;
u16 dpll_phase_cnfg;
u16 dpll_sync_cnfg;
u16 dpll_input_mode_cnfg;
};
struct idt82p33 {
struct idt82p33_channel channel[MAX_PHC_PLL];
struct device *dev;
u8 pll_mask;
/* Polls for external time stamps */
u8 extts_mask;
bool extts_single_shot;
struct delayed_work extts_work;
/* Remember the ptp channel to report extts */
struct idt82p33_channel *event_channel[MAX_PHC_PLL];
/* Mutex to protect operations from being interrupted */
struct mutex *lock;
struct regmap *regmap;
struct device *mfd;
/* Overhead calculation for adjtime */
ktime_t start_time;
int calculate_overhead_flag;
s64 tod_write_overhead_ns;
};
/* firmware interface */
struct idt82p33_fwrc {
u8 hiaddr;
u8 loaddr;
u8 value;
u8 reserved;
} __packed;
#endif /* PTP_IDT82P33_H */
Codebase Browser
linux