drivers/ptp/ptp_clockmatrix.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * PTP hardware clock driver for the IDT ClockMatrix(TM) family of timing and
   4  * synchronization devices.
   5  *
   6  * Copyright (C) 2019 Integrated Device Technology, Inc., a Renesas Company.
   7  */
   8 #ifndef PTP_IDTCLOCKMATRIX_H
   9 #define PTP_IDTCLOCKMATRIX_H
  10
  11 #include <linux/ktime.h>
  12 #include <linux/mfd/idt8a340_reg.h>
  13 #include <linux/ptp_clock.h>
  14 #include <linux/regmap.h>
  15
  16 #define FW_FILENAME     "idtcm.bin"
  17 #define MAX_TOD         (4)
  18 #define MAX_PLL         (8)
  19 #define MAX_REF_CLK     (16)
  20
  21 #define MAX_ABS_WRITE_PHASE_NANOSECONDS (107374182L)
  22
  23 #define TOD_MASK_ADDR           (0xFFA5)
  24 #define DEFAULT_TOD_MASK        (0x04)
  25
  26 #define SET_U16_LSB(orig, val8) (orig = (0xff00 & (orig)) | (val8))
  27 #define SET_U16_MSB(orig, val8) (orig = (0x00ff & (orig)) | (val8 << 8))
  28
  29 #define TOD0_PTP_PLL_ADDR               (0xFFA8)
  30 #define TOD1_PTP_PLL_ADDR               (0xFFA9)
  31 #define TOD2_PTP_PLL_ADDR               (0xFFAA)
  32 #define TOD3_PTP_PLL_ADDR               (0xFFAB)
  33
  34 #define TOD0_OUT_ALIGN_MASK_ADDR        (0xFFB0)
  35 #define TOD1_OUT_ALIGN_MASK_ADDR        (0xFFB2)
  36 #define TOD2_OUT_ALIGN_MASK_ADDR        (0xFFB4)
  37 #define TOD3_OUT_ALIGN_MASK_ADDR        (0xFFB6)
  38
  39 #define DEFAULT_OUTPUT_MASK_PLL0        (0x003)
  40 #define DEFAULT_OUTPUT_MASK_PLL1        (0x00c)
  41 #define DEFAULT_OUTPUT_MASK_PLL2        (0x030)
  42 #define DEFAULT_OUTPUT_MASK_PLL3        (0x0c0)
  43
  44 #define DEFAULT_TOD0_PTP_PLL            (0)
  45 #define DEFAULT_TOD1_PTP_PLL            (1)
  46 #define DEFAULT_TOD2_PTP_PLL            (2)
  47 #define DEFAULT_TOD3_PTP_PLL            (3)
  48
  49 #define PHASE_PULL_IN_THRESHOLD_NS_DEPRECATED   (150000)
  50 #define PHASE_PULL_IN_THRESHOLD_NS              (15000)
  51 #define TOD_WRITE_OVERHEAD_COUNT_MAX            (2)
  52 #define TOD_BYTE_COUNT                          (11)
  53
  54 #define LOCK_TIMEOUT_MS                 (2000)
  55 #define LOCK_POLL_INTERVAL_MS           (10)
  56
  57 #define IDTCM_MAX_WRITE_COUNT           (512)
  58
  59 #define PHASE_PULL_IN_MAX_PPB           (144000)
  60 #define PHASE_PULL_IN_MIN_THRESHOLD_NS  (2)
  61
  62 /*
  63  * Return register address based on passed in firmware version
  64  */
  65 #define IDTCM_FW_REG(FW, VER, REG)      (((FW) < (VER)) ? (REG) : (REG##_##VER))
  66 enum fw_version {
  67         V_DEFAULT = 0,
  68         V487 = 1,
  69         V520 = 2,
  70 };
  71
  72 /* PTP PLL Mode */
  73 enum ptp_pll_mode {
  74         PTP_PLL_MODE_MIN = 0,
  75         PTP_PLL_MODE_WRITE_FREQUENCY = PTP_PLL_MODE_MIN,
  76         PTP_PLL_MODE_WRITE_PHASE,
  77         PTP_PLL_MODE_UNSUPPORTED,
  78         PTP_PLL_MODE_MAX = PTP_PLL_MODE_UNSUPPORTED,
  79 };
  80
  81 struct idtcm;
  82
  83 struct idtcm_channel {
  84         struct ptp_clock_info   caps;
  85         struct ptp_clock        *ptp_clock;
  86         struct idtcm            *idtcm;
  87         u16                     dpll_phase;
  88         u16                     dpll_freq;
  89         u16                     dpll_n;
  90         u16                     dpll_ctrl_n;
  91         u16                     dpll_phase_pull_in;
  92         u16                     tod_read_primary;
  93         u16                     tod_read_secondary;
  94         u16                     tod_write;
  95         u16                     tod_n;
  96         u16                     hw_dpll_n;
  97         u8                      sync_src;
  98         enum ptp_pll_mode       mode;
  99         int                     (*configure_write_frequency)(struct idtcm_channel *channel);
 100         int                     (*configure_write_phase)(struct idtcm_channel *channel);
 101         int                     (*do_phase_pull_in)(struct idtcm_channel *channel,
 102                                                     s32 offset_ns, u32 max_ffo_ppb);
 103         s32                     current_freq_scaled_ppm;
 104         bool                    phase_pull_in;
 105         u32                     dco_delay;
 106         /* last input trigger for extts */
 107         u8                      refn;
 108         u8                      pll;
 109         u8                      tod;
 110         u16                     output_mask;
 111 };
 112
 113 struct idtcm {
 114         struct idtcm_channel    channel[MAX_TOD];
 115         struct device           *dev;
 116         u8                      tod_mask;
 117         char                    version[16];
 118         enum fw_version         fw_ver;
 119         /* Polls for external time stamps */
 120         u8                      extts_mask;
 121         bool                    extts_single_shot;
 122         struct delayed_work     extts_work;
 123         /* Remember the ptp channel to report extts */
 124         struct idtcm_channel    *event_channel[MAX_TOD];
 125         /* Mutex to protect operations from being interrupted */
 126         struct mutex            *lock;
 127         struct device           *mfd;
 128         struct regmap           *regmap;
 129         /* Overhead calculation for adjtime */
 130         u8                      calculate_overhead_flag;
 131         s64                     tod_write_overhead_ns;
 132         ktime_t                 start_time;
 133 };
 134
 135 struct idtcm_fwrc {
 136         u8 hiaddr;
 137         u8 loaddr;
 138         u8 value;
 139         u8 reserved;
 140 } __packed;
 141
 142 #endif /* PTP_IDTCLOCKMATRIX_H */