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macb: Common code to enable ptp support for MACB/GEM
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This patch does the following:
- MACB/GEM-PTP interface
- registers and bitfields for TSU
- capability flags to enable PTP per platform basis

Signed-off-by: Andrei Pistirica <andrei.pistirica@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Andrei.Pistirica@microchip.com authored and David S. Miller committed Jan 19, 2017
1 parent 54c30f6 commit c2594d8
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Showing 2 changed files with 104 additions and 2 deletions.
32 changes: 30 additions & 2 deletions drivers/net/ethernet/cadence/macb.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2085,6 +2085,9 @@ static int macb_open(struct net_device *dev)

netif_tx_start_all_queues(dev);

if (bp->ptp_info)
bp->ptp_info->ptp_init(dev);

return 0;
}

Expand All @@ -2106,6 +2109,9 @@ static int macb_close(struct net_device *dev)

macb_free_consistent(bp);

if (bp->ptp_info)
bp->ptp_info->ptp_remove(dev);

return 0;
}

Expand Down Expand Up @@ -2379,6 +2385,17 @@ static int macb_set_ringparam(struct net_device *netdev,
return 0;
}

static int macb_get_ts_info(struct net_device *netdev,
struct ethtool_ts_info *info)
{
struct macb *bp = netdev_priv(netdev);

if (bp->ptp_info)
return bp->ptp_info->get_ts_info(netdev, info);

return ethtool_op_get_ts_info(netdev, info);
}

static const struct ethtool_ops macb_ethtool_ops = {
.get_regs_len = macb_get_regs_len,
.get_regs = macb_get_regs,
Expand All @@ -2396,7 +2413,7 @@ static const struct ethtool_ops gem_ethtool_ops = {
.get_regs_len = macb_get_regs_len,
.get_regs = macb_get_regs,
.get_link = ethtool_op_get_link,
.get_ts_info = ethtool_op_get_ts_info,
.get_ts_info = macb_get_ts_info,
.get_ethtool_stats = gem_get_ethtool_stats,
.get_strings = gem_get_ethtool_strings,
.get_sset_count = gem_get_sset_count,
Expand All @@ -2409,14 +2426,25 @@ static const struct ethtool_ops gem_ethtool_ops = {
static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct phy_device *phydev = dev->phydev;
struct macb *bp = netdev_priv(dev);

if (!netif_running(dev))
return -EINVAL;

if (!phydev)
return -ENODEV;

return phy_mii_ioctl(phydev, rq, cmd);
if (!bp->ptp_info)
return phy_mii_ioctl(phydev, rq, cmd);

switch (cmd) {
case SIOCSHWTSTAMP:
return bp->ptp_info->set_hwtst(dev, rq, cmd);
case SIOCGHWTSTAMP:
return bp->ptp_info->get_hwtst(dev, rq);
default:
return phy_mii_ioctl(phydev, rq, cmd);
}
}

static int macb_set_features(struct net_device *netdev,
Expand Down
74 changes: 74 additions & 0 deletions drivers/net/ethernet/cadence/macb.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -131,6 +131,20 @@
#define GEM_RXIPCCNT 0x01a8 /* IP header Checksum Error Counter */
#define GEM_RXTCPCCNT 0x01ac /* TCP Checksum Error Counter */
#define GEM_RXUDPCCNT 0x01b0 /* UDP Checksum Error Counter */
#define GEM_TISUBN 0x01bc /* 1588 Timer Increment Sub-ns */
#define GEM_TSH 0x01c0 /* 1588 Timer Seconds High */
#define GEM_TSL 0x01d0 /* 1588 Timer Seconds Low */
#define GEM_TN 0x01d4 /* 1588 Timer Nanoseconds */
#define GEM_TA 0x01d8 /* 1588 Timer Adjust */
#define GEM_TI 0x01dc /* 1588 Timer Increment */
#define GEM_EFTSL 0x01e0 /* PTP Event Frame Tx Seconds Low */
#define GEM_EFTN 0x01e4 /* PTP Event Frame Tx Nanoseconds */
#define GEM_EFRSL 0x01e8 /* PTP Event Frame Rx Seconds Low */
#define GEM_EFRN 0x01ec /* PTP Event Frame Rx Nanoseconds */
#define GEM_PEFTSL 0x01f0 /* PTP Peer Event Frame Tx Secs Low */
#define GEM_PEFTN 0x01f4 /* PTP Peer Event Frame Tx Ns */
#define GEM_PEFRSL 0x01f8 /* PTP Peer Event Frame Rx Sec Low */
#define GEM_PEFRN 0x01fc /* PTP Peer Event Frame Rx Ns */
#define GEM_DCFG1 0x0280 /* Design Config 1 */
#define GEM_DCFG2 0x0284 /* Design Config 2 */
#define GEM_DCFG3 0x0288 /* Design Config 3 */
Expand Down Expand Up @@ -174,6 +188,7 @@
#define MACB_NCR_TPF_SIZE 1
#define MACB_TZQ_OFFSET 12 /* Transmit zero quantum pause frame */
#define MACB_TZQ_SIZE 1
#define MACB_SRTSM_OFFSET 15

/* Bitfields in NCFGR */
#define MACB_SPD_OFFSET 0 /* Speed */
Expand Down Expand Up @@ -319,6 +334,32 @@
#define MACB_PTZ_SIZE 1
#define MACB_WOL_OFFSET 14 /* Enable wake-on-lan interrupt */
#define MACB_WOL_SIZE 1
#define MACB_DRQFR_OFFSET 18 /* PTP Delay Request Frame Received */
#define MACB_DRQFR_SIZE 1
#define MACB_SFR_OFFSET 19 /* PTP Sync Frame Received */
#define MACB_SFR_SIZE 1
#define MACB_DRQFT_OFFSET 20 /* PTP Delay Request Frame Transmitted */
#define MACB_DRQFT_SIZE 1
#define MACB_SFT_OFFSET 21 /* PTP Sync Frame Transmitted */
#define MACB_SFT_SIZE 1
#define MACB_PDRQFR_OFFSET 22 /* PDelay Request Frame Received */
#define MACB_PDRQFR_SIZE 1
#define MACB_PDRSFR_OFFSET 23 /* PDelay Response Frame Received */
#define MACB_PDRSFR_SIZE 1
#define MACB_PDRQFT_OFFSET 24 /* PDelay Request Frame Transmitted */
#define MACB_PDRQFT_SIZE 1
#define MACB_PDRSFT_OFFSET 25 /* PDelay Response Frame Transmitted */
#define MACB_PDRSFT_SIZE 1
#define MACB_SRI_OFFSET 26 /* TSU Seconds Register Increment */
#define MACB_SRI_SIZE 1

/* Timer increment fields */
#define MACB_TI_CNS_OFFSET 0
#define MACB_TI_CNS_SIZE 8
#define MACB_TI_ACNS_OFFSET 8
#define MACB_TI_ACNS_SIZE 8
#define MACB_TI_NIT_OFFSET 16
#define MACB_TI_NIT_SIZE 8

/* Bitfields in MAN */
#define MACB_DATA_OFFSET 0 /* data */
Expand Down Expand Up @@ -386,6 +427,17 @@
#define GEM_PBUF_LSO_OFFSET 27
#define GEM_PBUF_LSO_SIZE 1

/* Bitfields in TISUBN */
#define GEM_SUBNSINCR_OFFSET 0
#define GEM_SUBNSINCR_SIZE 16

/* Bitfields in TI */
#define GEM_NSINCR_OFFSET 0
#define GEM_NSINCR_SIZE 8

/* Bitfields in ADJ */
#define GEM_ADDSUB_OFFSET 31
#define GEM_ADDSUB_SIZE 1
/* Constants for CLK */
#define MACB_CLK_DIV8 0
#define MACB_CLK_DIV16 1
Expand Down Expand Up @@ -413,6 +465,7 @@
#define MACB_CAPS_NO_GIGABIT_HALF 0x00000008
#define MACB_CAPS_USRIO_DISABLED 0x00000010
#define MACB_CAPS_JUMBO 0x00000020
#define MACB_CAPS_GEM_HAS_PTP 0x00000040
#define MACB_CAPS_FIFO_MODE 0x10000000
#define MACB_CAPS_GIGABIT_MODE_AVAILABLE 0x20000000
#define MACB_CAPS_SG_DISABLED 0x40000000
Expand Down Expand Up @@ -782,6 +835,20 @@ struct macb_or_gem_ops {
int (*mog_rx)(struct macb *bp, int budget);
};

/* MACB-PTP interface: adapt to platform needs. */
struct macb_ptp_info {
void (*ptp_init)(struct net_device *ndev);
void (*ptp_remove)(struct net_device *ndev);
s32 (*get_ptp_max_adj)(void);
unsigned int (*get_tsu_rate)(struct macb *bp);
int (*get_ts_info)(struct net_device *dev,
struct ethtool_ts_info *info);
int (*get_hwtst)(struct net_device *netdev,
struct ifreq *ifr);
int (*set_hwtst)(struct net_device *netdev,
struct ifreq *ifr, int cmd);
};

struct macb_config {
u32 caps;
unsigned int dma_burst_length;
Expand Down Expand Up @@ -874,11 +941,18 @@ struct macb {
unsigned int jumbo_max_len;

u32 wol;

struct macb_ptp_info *ptp_info; /* macb-ptp interface */
};

static inline bool macb_is_gem(struct macb *bp)
{
return !!(bp->caps & MACB_CAPS_MACB_IS_GEM);
}

static inline bool gem_has_ptp(struct macb *bp)
{
return !!(bp->caps & MACB_CAPS_GEM_HAS_PTP);
}

#endif /* _MACB_H */

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