143 lines
3.6 KiB
C
143 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* PTP hardware clock driver for the IDT ClockMatrix(TM) family of timing and
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* synchronization devices.
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*
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* Copyright (C) 2019 Integrated Device Technology, Inc., a Renesas Company.
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*/
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#ifndef PTP_IDTCLOCKMATRIX_H
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#define PTP_IDTCLOCKMATRIX_H
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#include <linux/ktime.h>
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#include <linux/mfd/idt8a340_reg.h>
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#include <linux/ptp_clock.h>
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#include <linux/regmap.h>
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#define FW_FILENAME "idtcm.bin"
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#define MAX_TOD (4)
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#define MAX_PLL (8)
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#define MAX_REF_CLK (16)
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#define MAX_ABS_WRITE_PHASE_PICOSECONDS (107374182350LL)
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#define TOD_MASK_ADDR (0xFFA5)
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#define DEFAULT_TOD_MASK (0x04)
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#define SET_U16_LSB(orig, val8) (orig = (0xff00 & (orig)) | (val8))
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#define SET_U16_MSB(orig, val8) (orig = (0x00ff & (orig)) | (val8 << 8))
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#define TOD0_PTP_PLL_ADDR (0xFFA8)
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#define TOD1_PTP_PLL_ADDR (0xFFA9)
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#define TOD2_PTP_PLL_ADDR (0xFFAA)
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#define TOD3_PTP_PLL_ADDR (0xFFAB)
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#define TOD0_OUT_ALIGN_MASK_ADDR (0xFFB0)
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#define TOD1_OUT_ALIGN_MASK_ADDR (0xFFB2)
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#define TOD2_OUT_ALIGN_MASK_ADDR (0xFFB4)
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#define TOD3_OUT_ALIGN_MASK_ADDR (0xFFB6)
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#define DEFAULT_OUTPUT_MASK_PLL0 (0x003)
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#define DEFAULT_OUTPUT_MASK_PLL1 (0x00c)
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#define DEFAULT_OUTPUT_MASK_PLL2 (0x030)
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#define DEFAULT_OUTPUT_MASK_PLL3 (0x0c0)
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#define DEFAULT_TOD0_PTP_PLL (0)
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#define DEFAULT_TOD1_PTP_PLL (1)
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#define DEFAULT_TOD2_PTP_PLL (2)
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#define DEFAULT_TOD3_PTP_PLL (3)
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#define PHASE_PULL_IN_THRESHOLD_NS_DEPRECATED (150000)
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#define PHASE_PULL_IN_THRESHOLD_NS (15000)
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#define TOD_WRITE_OVERHEAD_COUNT_MAX (2)
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#define TOD_BYTE_COUNT (11)
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#define LOCK_TIMEOUT_MS (2000)
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#define LOCK_POLL_INTERVAL_MS (10)
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#define IDTCM_MAX_WRITE_COUNT (512)
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#define PHASE_PULL_IN_MAX_PPB (144000)
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#define PHASE_PULL_IN_MIN_THRESHOLD_NS (2)
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/*
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* Return register address based on passed in firmware version
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*/
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#define IDTCM_FW_REG(FW, VER, REG) (((FW) < (VER)) ? (REG) : (REG##_##VER))
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enum fw_version {
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V_DEFAULT = 0,
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V487 = 1,
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V520 = 2,
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};
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/* PTP PLL Mode */
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enum ptp_pll_mode {
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PTP_PLL_MODE_MIN = 0,
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PTP_PLL_MODE_WRITE_FREQUENCY = PTP_PLL_MODE_MIN,
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PTP_PLL_MODE_WRITE_PHASE,
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PTP_PLL_MODE_UNSUPPORTED,
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PTP_PLL_MODE_MAX = PTP_PLL_MODE_UNSUPPORTED,
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};
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struct idtcm;
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struct idtcm_channel {
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struct ptp_clock_info caps;
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struct ptp_clock *ptp_clock;
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struct idtcm *idtcm;
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u16 dpll_phase;
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u16 dpll_freq;
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u16 dpll_n;
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u16 dpll_ctrl_n;
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u16 dpll_phase_pull_in;
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u16 tod_read_primary;
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u16 tod_read_secondary;
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u16 tod_write;
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u16 tod_n;
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u16 hw_dpll_n;
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u8 sync_src;
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enum ptp_pll_mode mode;
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int (*configure_write_frequency)(struct idtcm_channel *channel);
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int (*configure_write_phase)(struct idtcm_channel *channel);
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int (*do_phase_pull_in)(struct idtcm_channel *channel,
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s32 offset_ns, u32 max_ffo_ppb);
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s32 current_freq_scaled_ppm;
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bool phase_pull_in;
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u32 dco_delay;
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/* last input trigger for extts */
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u8 refn;
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u8 pll;
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u8 tod;
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u16 output_mask;
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};
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struct idtcm {
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struct idtcm_channel channel[MAX_TOD];
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struct device *dev;
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u8 tod_mask;
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char version[16];
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enum fw_version fw_ver;
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/* Polls for external time stamps */
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u8 extts_mask;
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bool extts_single_shot;
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struct delayed_work extts_work;
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/* Remember the ptp channel to report extts */
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struct idtcm_channel *event_channel[MAX_TOD];
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/* Mutex to protect operations from being interrupted */
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struct mutex *lock;
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struct device *mfd;
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struct regmap *regmap;
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/* Overhead calculation for adjtime */
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u8 calculate_overhead_flag;
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s64 tod_write_overhead_ns;
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ktime_t start_time;
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};
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struct idtcm_fwrc {
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u8 hiaddr;
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u8 loaddr;
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u8 value;
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u8 reserved;
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} __packed;
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#endif /* PTP_IDTCLOCKMATRIX_H */
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