diff options
author | Jose Abreu <Jose.Abreu@synopsys.com> | 2019-08-17 20:54:45 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2019-08-17 12:43:59 -0700 |
commit | 95eaf3cd0a9044b2cbfe1081692e568879363cc7 (patch) | |
tree | 51481d9f921c3517fcc6c7eafeb2143224ea8b01 /drivers/net/ethernet | |
parent | b5418e130e5f2529b6db82725658bfc6d5485a6d (diff) | |
download | linux-95eaf3cd0a9044b2cbfe1081692e568879363cc7.tar.bz2 |
net: stmmac: dwxgmac: Add Flexible PPS support
Add the support for Flexible PPS in XGMAC cores.
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
-rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h | 19 | ||||
-rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c | 56 |
2 files changed, 75 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h index 995d533b9316..dbac63972faf 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h @@ -149,6 +149,25 @@ #define XGMAC_TXTIMESTAMP_NSEC 0x00000d30 #define XGMAC_TXTSSTSLO GENMASK(30, 0) #define XGMAC_TXTIMESTAMP_SEC 0x00000d34 +#define XGMAC_PPS_CONTROL 0x00000d70 +#define XGMAC_PPS_MAXIDX(x) ((((x) + 1) * 8) - 1) +#define XGMAC_PPS_MINIDX(x) ((x) * 8) +#define XGMAC_PPSx_MASK(x) \ + GENMASK(XGMAC_PPS_MAXIDX(x), XGMAC_PPS_MINIDX(x)) +#define XGMAC_TRGTMODSELx(x, val) \ + GENMASK(XGMAC_PPS_MAXIDX(x) - 1, XGMAC_PPS_MAXIDX(x) - 2) & \ + ((val) << (XGMAC_PPS_MAXIDX(x) - 2)) +#define XGMAC_PPSCMDx(x, val) \ + GENMASK(XGMAC_PPS_MINIDX(x) + 3, XGMAC_PPS_MINIDX(x)) & \ + ((val) << XGMAC_PPS_MINIDX(x)) +#define XGMAC_PPSCMD_START 0x2 +#define XGMAC_PPSCMD_STOP 0x5 +#define XGMAC_PPSEN0 BIT(4) +#define XGMAC_PPSx_TARGET_TIME_SEC(x) (0x00000d80 + (x) * 0x10) +#define XGMAC_PPSx_TARGET_TIME_NSEC(x) (0x00000d84 + (x) * 0x10) +#define XGMAC_TRGTBUSY0 BIT(31) +#define XGMAC_PPSx_INTERVAL(x) (0x00000d88 + (x) * 0x10) +#define XGMAC_PPSx_WIDTH(x) (0x00000d8c + (x) * 0x10) /* MTL Registers */ #define XGMAC_MTL_OPMODE 0x00001000 diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c index ba5183f38f84..f843e3640f50 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c @@ -8,6 +8,7 @@ #include <linux/crc32.h> #include <linux/iopoll.h> #include "stmmac.h" +#include "stmmac_ptp.h" #include "dwxgmac2.h" static void dwxgmac2_core_init(struct mac_device_info *hw, @@ -1011,6 +1012,60 @@ static int dwxgmac2_get_mac_tx_timestamp(struct mac_device_info *hw, u64 *ts) return 0; } +static int dwxgmac2_flex_pps_config(void __iomem *ioaddr, int index, + struct stmmac_pps_cfg *cfg, bool enable, + u32 sub_second_inc, u32 systime_flags) +{ + u32 tnsec = readl(ioaddr + XGMAC_PPSx_TARGET_TIME_NSEC(index)); + u32 val = readl(ioaddr + XGMAC_PPS_CONTROL); + u64 period; + + if (!cfg->available) + return -EINVAL; + if (tnsec & XGMAC_TRGTBUSY0) + return -EBUSY; + if (!sub_second_inc || !systime_flags) + return -EINVAL; + + val &= ~XGMAC_PPSx_MASK(index); + + if (!enable) { + val |= XGMAC_PPSCMDx(index, XGMAC_PPSCMD_STOP); + writel(val, ioaddr + XGMAC_PPS_CONTROL); + return 0; + } + + val |= XGMAC_PPSCMDx(index, XGMAC_PPSCMD_START); + val |= XGMAC_TRGTMODSELx(index, XGMAC_PPSCMD_START); + val |= XGMAC_PPSEN0; + + writel(cfg->start.tv_sec, ioaddr + XGMAC_PPSx_TARGET_TIME_SEC(index)); + + if (!(systime_flags & PTP_TCR_TSCTRLSSR)) + cfg->start.tv_nsec = (cfg->start.tv_nsec * 1000) / 465; + writel(cfg->start.tv_nsec, ioaddr + XGMAC_PPSx_TARGET_TIME_NSEC(index)); + + period = cfg->period.tv_sec * 1000000000; + period += cfg->period.tv_nsec; + + do_div(period, sub_second_inc); + + if (period <= 1) + return -EINVAL; + + writel(period - 1, ioaddr + XGMAC_PPSx_INTERVAL(index)); + + period >>= 1; + if (period <= 1) + return -EINVAL; + + writel(period - 1, ioaddr + XGMAC_PPSx_WIDTH(index)); + + /* Finally, activate it */ + writel(val, ioaddr + XGMAC_PPS_CONTROL); + return 0; +} + const struct stmmac_ops dwxgmac210_ops = { .core_init = dwxgmac2_core_init, .set_mac = dwxgmac2_set_mac, @@ -1048,6 +1103,7 @@ const struct stmmac_ops dwxgmac210_ops = { .update_vlan_hash = dwxgmac2_update_vlan_hash, .rxp_config = dwxgmac3_rxp_config, .get_mac_tx_timestamp = dwxgmac2_get_mac_tx_timestamp, + .flex_pps_config = dwxgmac2_flex_pps_config, }; int dwxgmac2_setup(struct stmmac_priv *priv) |