forked from Minki/linux
net: dsa: mv88e6xxx: add PTP support for MV88E6250 family
This adds PTP support for the MV88E6250 family. Signed-off-by: Hubert Feurstein <h.feurstein@gmail.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hubert Feurstein
David S. Miller
parent
8858ccc837
commit
7150961487
@ -3538,6 +3538,8 @@ static const struct mv88e6xxx_ops mv88e6250_ops = {
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.reset = mv88e6250_g1_reset,
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.vtu_getnext = mv88e6250_g1_vtu_getnext,
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.vtu_loadpurge = mv88e6250_g1_vtu_loadpurge,
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.avb_ops = &mv88e6352_avb_ops,
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.ptp_ops = &mv88e6250_ptp_ops,
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.phylink_validate = mv88e6065_phylink_validate,
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};
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@ -4334,6 +4336,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
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.atu_move_port_mask = 0xf,
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.dual_chip = true,
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.tag_protocol = DSA_TAG_PROTO_DSA,
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.ptp_support = true,
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.ops = &mv88e6250_ops,
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},
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@ -4379,6 +4382,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = {
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.atu_move_port_mask = 0xf,
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.dual_chip = true,
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.tag_protocol = DSA_TAG_PROTO_DSA,
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.ptp_support = true,
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.ops = &mv88e6250_ops,
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},
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@ -539,6 +539,10 @@ struct mv88e6xxx_ptp_ops {
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int arr1_sts_reg;
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int dep_sts_reg;
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u32 rx_filters;
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u32 cc_shift;
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u32 cc_mult;
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u32 cc_mult_num;
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u32 cc_mult_dem;
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};
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#define STATS_TYPE_PORT BIT(0)
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@ -15,11 +15,31 @@
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#include "hwtstamp.h"
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#include "ptp.h"
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/* Raw timestamps are in units of 8-ns clock periods. */
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#define CC_SHIFT 28
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#define CC_MULT (8 << CC_SHIFT)
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#define CC_MULT_NUM (1 << 9)
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#define CC_MULT_DEM 15625ULL
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#define MV88E6XXX_MAX_ADJ_PPB 1000000
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/* Family MV88E6250:
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* Raw timestamps are in units of 10-ns clock periods.
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*
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* clkadj = scaled_ppm * 10*2^28 / (10^6 * 2^16)
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* simplifies to
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* clkadj = scaled_ppm * 2^7 / 5^5
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*/
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#define MV88E6250_CC_SHIFT 28
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#define MV88E6250_CC_MULT (10 << MV88E6250_CC_SHIFT)
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#define MV88E6250_CC_MULT_NUM (1 << 7)
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#define MV88E6250_CC_MULT_DEM 3125ULL
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/* Other families:
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* Raw timestamps are in units of 8-ns clock periods.
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*
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* clkadj = scaled_ppm * 8*2^28 / (10^6 * 2^16)
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* simplifies to
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* clkadj = scaled_ppm * 2^9 / 5^6
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*/
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#define MV88E6XXX_CC_SHIFT 28
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#define MV88E6XXX_CC_MULT (8 << MV88E6XXX_CC_SHIFT)
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#define MV88E6XXX_CC_MULT_NUM (1 << 9)
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#define MV88E6XXX_CC_MULT_DEM 15625ULL
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#define TAI_EVENT_WORK_INTERVAL msecs_to_jiffies(100)
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@ -179,6 +199,7 @@ out:
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static int mv88e6xxx_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
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{
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struct mv88e6xxx_chip *chip = ptp_to_chip(ptp);
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const struct mv88e6xxx_ptp_ops *ptp_ops = chip->info->ops->ptp_ops;
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int neg_adj = 0;
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u32 diff, mult;
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u64 adj;
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@ -187,10 +208,11 @@ static int mv88e6xxx_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
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neg_adj = 1;
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scaled_ppm = -scaled_ppm;
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}
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mult = CC_MULT;
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adj = CC_MULT_NUM;
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mult = ptp_ops->cc_mult;
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adj = ptp_ops->cc_mult_num;
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adj *= scaled_ppm;
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diff = div_u64(adj, CC_MULT_DEM);
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diff = div_u64(adj, ptp_ops->cc_mult_dem);
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mv88e6xxx_reg_lock(chip);
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@ -324,6 +346,37 @@ const struct mv88e6xxx_ptp_ops mv88e6165_ptp_ops = {
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(1 << HWTSTAMP_FILTER_PTP_V2_EVENT) |
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(1 << HWTSTAMP_FILTER_PTP_V2_SYNC) |
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(1 << HWTSTAMP_FILTER_PTP_V2_DELAY_REQ),
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.cc_shift = MV88E6XXX_CC_SHIFT,
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.cc_mult = MV88E6XXX_CC_MULT,
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.cc_mult_num = MV88E6XXX_CC_MULT_NUM,
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.cc_mult_dem = MV88E6XXX_CC_MULT_DEM,
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};
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const struct mv88e6xxx_ptp_ops mv88e6250_ptp_ops = {
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.clock_read = mv88e6352_ptp_clock_read,
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.ptp_enable = mv88e6352_ptp_enable,
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.ptp_verify = mv88e6352_ptp_verify,
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.event_work = mv88e6352_tai_event_work,
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.port_enable = mv88e6352_hwtstamp_port_enable,
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.port_disable = mv88e6352_hwtstamp_port_disable,
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.n_ext_ts = 1,
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.arr0_sts_reg = MV88E6XXX_PORT_PTP_ARR0_STS,
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.arr1_sts_reg = MV88E6XXX_PORT_PTP_ARR1_STS,
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.dep_sts_reg = MV88E6XXX_PORT_PTP_DEP_STS,
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.rx_filters = (1 << HWTSTAMP_FILTER_NONE) |
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(1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
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(1 << HWTSTAMP_FILTER_PTP_V2_L4_SYNC) |
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(1 << HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ) |
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(1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
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(1 << HWTSTAMP_FILTER_PTP_V2_L2_SYNC) |
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(1 << HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ) |
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(1 << HWTSTAMP_FILTER_PTP_V2_EVENT) |
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(1 << HWTSTAMP_FILTER_PTP_V2_SYNC) |
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(1 << HWTSTAMP_FILTER_PTP_V2_DELAY_REQ),
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.cc_shift = MV88E6250_CC_SHIFT,
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.cc_mult = MV88E6250_CC_MULT,
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.cc_mult_num = MV88E6250_CC_MULT_NUM,
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.cc_mult_dem = MV88E6250_CC_MULT_DEM,
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};
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const struct mv88e6xxx_ptp_ops mv88e6352_ptp_ops = {
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@ -347,6 +400,10 @@ const struct mv88e6xxx_ptp_ops mv88e6352_ptp_ops = {
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(1 << HWTSTAMP_FILTER_PTP_V2_EVENT) |
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(1 << HWTSTAMP_FILTER_PTP_V2_SYNC) |
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(1 << HWTSTAMP_FILTER_PTP_V2_DELAY_REQ),
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.cc_shift = MV88E6XXX_CC_SHIFT,
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.cc_mult = MV88E6XXX_CC_MULT,
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.cc_mult_num = MV88E6XXX_CC_MULT_NUM,
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.cc_mult_dem = MV88E6XXX_CC_MULT_DEM,
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};
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static u64 mv88e6xxx_ptp_clock_read(const struct cyclecounter *cc)
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@ -384,8 +441,8 @@ int mv88e6xxx_ptp_setup(struct mv88e6xxx_chip *chip)
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memset(&chip->tstamp_cc, 0, sizeof(chip->tstamp_cc));
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chip->tstamp_cc.read = mv88e6xxx_ptp_clock_read;
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chip->tstamp_cc.mask = CYCLECOUNTER_MASK(32);
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chip->tstamp_cc.mult = CC_MULT;
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chip->tstamp_cc.shift = CC_SHIFT;
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chip->tstamp_cc.mult = ptp_ops->cc_mult;
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chip->tstamp_cc.shift = ptp_ops->cc_shift;
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timecounter_init(&chip->tstamp_tc, &chip->tstamp_cc,
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ktime_to_ns(ktime_get_real()));
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@ -397,7 +454,6 @@ int mv88e6xxx_ptp_setup(struct mv88e6xxx_chip *chip)
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chip->ptp_clock_info.owner = THIS_MODULE;
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snprintf(chip->ptp_clock_info.name, sizeof(chip->ptp_clock_info.name),
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"%s", dev_name(chip->dev));
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chip->ptp_clock_info.max_adj = 1000000;
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chip->ptp_clock_info.n_ext_ts = ptp_ops->n_ext_ts;
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chip->ptp_clock_info.n_per_out = 0;
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@ -413,6 +469,7 @@ int mv88e6xxx_ptp_setup(struct mv88e6xxx_chip *chip)
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}
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chip->ptp_clock_info.pin_config = chip->pin_config;
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chip->ptp_clock_info.max_adj = MV88E6XXX_MAX_ADJ_PPB;
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chip->ptp_clock_info.adjfine = mv88e6xxx_ptp_adjfine;
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chip->ptp_clock_info.adjtime = mv88e6xxx_ptp_adjtime;
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chip->ptp_clock_info.gettime64 = mv88e6xxx_ptp_gettime;
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@ -149,6 +149,7 @@ void mv88e6xxx_ptp_free(struct mv88e6xxx_chip *chip);
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ptp_clock_info)
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extern const struct mv88e6xxx_ptp_ops mv88e6165_ptp_ops;
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extern const struct mv88e6xxx_ptp_ops mv88e6250_ptp_ops;
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extern const struct mv88e6xxx_ptp_ops mv88e6352_ptp_ops;
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#else /* !CONFIG_NET_DSA_MV88E6XXX_PTP */
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@ -168,6 +169,7 @@ static inline void mv88e6xxx_ptp_free(struct mv88e6xxx_chip *chip)
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}
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static const struct mv88e6xxx_ptp_ops mv88e6165_ptp_ops = {};
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static const struct mv88e6xxx_ptp_ops mv88e6250_ptp_ops = {};
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static const struct mv88e6xxx_ptp_ops mv88e6352_ptp_ops = {};
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#endif /* CONFIG_NET_DSA_MV88E6XXX_PTP */
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