Renesas Ethernet AVB PTP clock driver
Ethernet AVB device includes the gPTP timer, so we can implement a PTP clock
driver. We're doing that in a separate file, with the main Ethernet driver
calling the PTP driver's [de]initialization and interrupt handler functions.
Unfortunately, the clock seems tightly coupled with the AVB-DMAC, so when that
one leaves the operation mode, we have to unregister the PTP clock... :-(
Based on the original patches by Masaru Nagai.
Signed-off-by: Masaru Nagai <masaru.nagai.vx@renesas.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index f2656eb..8aa50ac 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -20,6 +20,8 @@
#include <linux/mdio-bitbang.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/ptp_clock_kernel.h>
#define BE_TX_RING_SIZE 64 /* TX ring size for Best Effort */
#define BE_RX_RING_SIZE 1024 /* RX ring size for Best Effort */
@@ -744,6 +746,23 @@
u16 tag;
};
+struct ravb_ptp_perout {
+ u32 target;
+ u32 period;
+};
+
+#define N_EXT_TS 1
+#define N_PER_OUT 1
+
+struct ravb_ptp {
+ struct ptp_clock *clock;
+ struct ptp_clock_info info;
+ u32 default_addend;
+ u32 current_addend;
+ int extts[N_EXT_TS];
+ struct ravb_ptp_perout perout[N_PER_OUT];
+};
+
struct ravb_private {
struct net_device *ndev;
struct platform_device *pdev;
@@ -768,6 +787,7 @@
u32 tstamp_rx_ctrl;
struct list_head ts_skb_list;
u32 ts_skb_tag;
+ struct ravb_ptp ptp;
spinlock_t lock; /* Register access lock */
u32 cur_rx[NUM_RX_QUEUE]; /* Consumer ring indices */
u32 dirty_rx[NUM_RX_QUEUE]; /* Producer ring indices */
@@ -803,4 +823,10 @@
iowrite32(data, priv->addr + reg);
}
+int ravb_wait(struct net_device *ndev, enum ravb_reg reg, u32 mask, u32 value);
+
+irqreturn_t ravb_ptp_interrupt(struct net_device *ndev);
+void ravb_ptp_init(struct net_device *ndev, struct platform_device *pdev);
+void ravb_ptp_stop(struct net_device *ndev);
+
#endif /* #ifndef __RAVB_H__ */