FEC: Add time stamping code and a PTP hardware clock

This patch adds a driver for the FEC(MX6) that offers time
stamping and a PTP haderware clock. Because FEC\ENET(MX6)
hardware frequency adjustment is complex, we have implemented
this in software by changing the multiplication factor of the
timecounter.

Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 38 insertions, 0 deletions

diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index e803812975df..c5a3bc1475c7 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -13,6 +13,12 @@
 #define FEC_H
 /****************************************************************************/
 
+#ifdef CONFIG_FEC_PTP
+#include <linux/clocksource.h>
+#include <linux/net_tstamp.h>
+#include <linux/ptp_clock_kernel.h>
+#endif
+
 #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
     defined(CONFIG_M520x) || defined(CONFIG_M532x) || \
     defined(CONFIG_ARCH_MXC) || defined(CONFIG_SOC_IMX28)
@@ -88,6 +94,13 @@ struct bufdesc {
         unsigned short cbd_datlen;      /* Data length */
         unsigned short cbd_sc;  /* Control and status info */
         unsigned long cbd_bufaddr;      /* Buffer address */
+#ifdef CONFIG_FEC_PTP
+        unsigned long cbd_esc;
+        unsigned long cbd_prot;
+        unsigned long cbd_bdu;
+        unsigned long ts;
+        unsigned short res0[4];
+#endif
 };
 #else
 struct bufdesc {
@@ -190,6 +203,9 @@ struct fec_enet_private {
 
         struct clk *clk_ipg;
         struct clk *clk_ahb;
+#ifdef CONFIG_FEC_PTP
+        struct clk *clk_ptp;
+#endif
 
         /* The saved address of a sent-in-place packet/buffer, for skfree(). */
         unsigned char *tx_bounce[TX_RING_SIZE];
@@ -227,7 +243,29 @@ struct fec_enet_private {
         int     full_duplex;
         struct  completion mdio_done;
         int     irq[FEC_IRQ_NUM];
+
+#ifdef CONFIG_FEC_PTP
+        struct ptp_clock *ptp_clock;
+        struct ptp_clock_info ptp_caps;
+        unsigned long last_overflow_check;
+        spinlock_t tmreg_lock;
+        struct cyclecounter cc;
+        struct timecounter tc;
+        int rx_hwtstamp_filter;
+        u32 base_incval;
+        u32 cycle_speed;
+        int hwts_rx_en;
+        int hwts_tx_en;
+        struct timer_list time_keep;
+#endif
+
 };
 
+#ifdef CONFIG_FEC_PTP
+void fec_ptp_init(struct net_device *ndev, struct platform_device *pdev);
+void fec_ptp_start_cyclecounter(struct net_device *ndev);
+int fec_ptp_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd);
+#endif
+
 /****************************************************************************/
 #endif /* FEC_H */