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Subject[PATCH net-next v3 10/11] net: ethernet: ti: cpts: add support for HW_TS_PUSH events
Date
Hence CPTS IRQ support is in place the W_TS_PUSH events can be added.
PWM capable DmTimers can be used to generete input signals for CPTS on TI
AM335x/AM437x/DRA7 SoCs to be timestamped:
AM335x/AM437x: timer4 - timer7
DRA7/AM57xx: timer13 - timer16

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
---
drivers/net/ethernet/ti/cpsw_priv.c | 5 ++-
drivers/net/ethernet/ti/cpts.c | 52 ++++++++++++++++++++++++++-
drivers/net/ethernet/ti/cpts.h | 5 +--
drivers/net/ethernet/ti/netcp_ethss.c | 3 +-
4 files changed, 60 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/ti/cpsw_priv.c b/drivers/net/ethernet/ti/cpsw_priv.c
index 97a058ca60ac..099208927400 100644
--- a/drivers/net/ethernet/ti/cpsw_priv.c
+++ b/drivers/net/ethernet/ti/cpsw_priv.c
@@ -28,6 +28,8 @@
#include "cpsw_sl.h"
#include "davinci_cpdma.h"

+#define CPTS_N_ETX_TS 4
+
int (*cpsw_slave_index)(struct cpsw_common *cpsw, struct cpsw_priv *priv);

void cpsw_intr_enable(struct cpsw_common *cpsw)
@@ -522,7 +524,8 @@ int cpsw_init_common(struct cpsw_common *cpsw, void __iomem *ss_regs,
if (!cpts_node)
cpts_node = cpsw->dev->of_node;

- cpsw->cpts = cpts_create(cpsw->dev, cpts_regs, cpts_node);
+ cpsw->cpts = cpts_create(cpsw->dev, cpts_regs, cpts_node,
+ CPTS_N_ETX_TS);
if (IS_ERR(cpsw->cpts)) {
ret = PTR_ERR(cpsw->cpts);
cpdma_ctlr_destroy(cpsw->dma);
diff --git a/drivers/net/ethernet/ti/cpts.c b/drivers/net/ethernet/ti/cpts.c
index 187fd1398b7e..403e1dbed673 100644
--- a/drivers/net/ethernet/ti/cpts.c
+++ b/drivers/net/ethernet/ti/cpts.c
@@ -32,6 +32,11 @@ struct cpts_skb_cb_data {
#define cpts_read32(c, r) readl_relaxed(&c->reg->r)
#define cpts_write32(c, v, r) writel_relaxed(v, &c->reg->r)

+static int cpts_event_port(struct cpts_event *event)
+{
+ return (event->high >> PORT_NUMBER_SHIFT) & PORT_NUMBER_MASK;
+}
+
static int event_expired(struct cpts_event *event)
{
return time_after(jiffies, event->tmo);
@@ -99,6 +104,7 @@ static void cpts_purge_txq(struct cpts *cpts)
*/
static int cpts_fifo_read(struct cpts *cpts, int match)
{
+ struct ptp_clock_event pevent;
bool need_schedule = false;
struct cpts_event *event;
unsigned long flags;
@@ -146,7 +152,12 @@ static int cpts_fifo_read(struct cpts *cpts, int match)
break;
case CPTS_EV_ROLL:
case CPTS_EV_HALF:
+ break;
case CPTS_EV_HW:
+ pevent.timestamp = event->timestamp;
+ pevent.type = PTP_CLOCK_EXTTS;
+ pevent.index = cpts_event_port(event) - 1;
+ ptp_clock_event(cpts->clock, &pevent);
break;
default:
dev_err(cpts->dev, "cpts: unknown event type\n");
@@ -272,9 +283,45 @@ static int cpts_ptp_settime(struct ptp_clock_info *ptp,
return 0;
}

+static int cpts_extts_enable(struct cpts *cpts, u32 index, int on)
+{
+ u32 v;
+
+ if (index >= cpts->info.n_ext_ts)
+ return -ENXIO;
+
+ if (((cpts->hw_ts_enable & BIT(index)) >> index) == on)
+ return 0;
+
+ mutex_lock(&cpts->ptp_clk_mutex);
+
+ v = cpts_read32(cpts, control);
+ if (on) {
+ v |= BIT(8 + index);
+ cpts->hw_ts_enable |= BIT(index);
+ } else {
+ v &= ~BIT(8 + index);
+ cpts->hw_ts_enable &= ~BIT(index);
+ }
+ cpts_write32(cpts, v, control);
+
+ mutex_unlock(&cpts->ptp_clk_mutex);
+
+ return 0;
+}
+
static int cpts_ptp_enable(struct ptp_clock_info *ptp,
struct ptp_clock_request *rq, int on)
{
+ struct cpts *cpts = container_of(ptp, struct cpts, info);
+
+ switch (rq->type) {
+ case PTP_CLK_REQ_EXTTS:
+ return cpts_extts_enable(cpts, rq->extts.index, on);
+ default:
+ break;
+ }
+
return -EOPNOTSUPP;
}

@@ -751,7 +798,7 @@ static int cpts_of_parse(struct cpts *cpts, struct device_node *node)
}

struct cpts *cpts_create(struct device *dev, void __iomem *regs,
- struct device_node *node)
+ struct device_node *node, u32 n_ext_ts)
{
struct cpts *cpts;
int ret;
@@ -790,6 +837,9 @@ struct cpts *cpts_create(struct device *dev, void __iomem *regs,
cpts->cc.mask = CLOCKSOURCE_MASK(32);
cpts->info = cpts_info;

+ if (n_ext_ts)
+ cpts->info.n_ext_ts = n_ext_ts;
+
cpts_calc_mult_shift(cpts);
/* save cc.mult original value as it can be modified
* by cpts_ptp_adjfreq().
diff --git a/drivers/net/ethernet/ti/cpts.h b/drivers/net/ethernet/ti/cpts.h
index e18cb5e436fe..acffe8a29b32 100644
--- a/drivers/net/ethernet/ti/cpts.h
+++ b/drivers/net/ethernet/ti/cpts.h
@@ -121,6 +121,7 @@ struct cpts {
struct mutex ptp_clk_mutex; /* sync PTP interface and worker */
bool irq_poll;
struct completion ts_push_complete;
+ u32 hw_ts_enable;
};

int cpts_rx_timestamp(struct cpts *cpts, struct sk_buff *skb);
@@ -128,7 +129,7 @@ void cpts_tx_timestamp(struct cpts *cpts, struct sk_buff *skb);
int cpts_register(struct cpts *cpts);
void cpts_unregister(struct cpts *cpts);
struct cpts *cpts_create(struct device *dev, void __iomem *regs,
- struct device_node *node);
+ struct device_node *node, u32 n_ext_ts);
void cpts_release(struct cpts *cpts);
void cpts_misc_interrupt(struct cpts *cpts);

@@ -160,7 +161,7 @@ static inline void cpts_tx_timestamp(struct cpts *cpts, struct sk_buff *skb)

static inline
struct cpts *cpts_create(struct device *dev, void __iomem *regs,
- struct device_node *node)
+ struct device_node *node, u32 n_ext_ts)
{
return NULL;
}
diff --git a/drivers/net/ethernet/ti/netcp_ethss.c b/drivers/net/ethernet/ti/netcp_ethss.c
index fb36115e9c51..9d6e27fb710e 100644
--- a/drivers/net/ethernet/ti/netcp_ethss.c
+++ b/drivers/net/ethernet/ti/netcp_ethss.c
@@ -3716,7 +3716,8 @@ static int gbe_probe(struct netcp_device *netcp_device, struct device *dev,
if (!cpts_node)
cpts_node = of_node_get(node);

- gbe_dev->cpts = cpts_create(gbe_dev->dev, gbe_dev->cpts_reg, cpts_node);
+ gbe_dev->cpts = cpts_create(gbe_dev->dev, gbe_dev->cpts_reg,
+ cpts_node, 0);
of_node_put(cpts_node);
if (IS_ENABLED(CONFIG_TI_CPTS) && IS_ERR(gbe_dev->cpts)) {
ret = PTR_ERR(gbe_dev->cpts);
--
2.17.1
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