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Message-Id: <20220309223237.34507-8-jonathan.lemon@gmail.com>
Date: Wed, 9 Mar 2022 14:32:34 -0800
From: Jonathan Lemon <jonathan.lemon@...il.com>
To: netdev@...r.kernel.org
Cc: kuba@...nel.org, davem@...emloft.net, richardcochran@...il.com,
kernel-team@...com
Subject: [PATCH net-next v1 07/10] ptp: ocp: Program the signal generators via PTP_CLK_REQ_PEROUT
The signal generators can be programmed either via the sysfs
file or through a PTP_CLK_REQ_PEROUT ioctl request.
Signed-off-by: Jonathan Lemon <jonathan.lemon@...il.com>
---
drivers/ptp/ptp_ocp.c | 103 ++++++++++++++++++++++++++++++++++++++----
1 file changed, 94 insertions(+), 9 deletions(-)
diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c
index f457809879a5..3c8550677369 100644
--- a/drivers/ptp/ptp_ocp.c
+++ b/drivers/ptp/ptp_ocp.c
@@ -331,6 +331,8 @@ static int ptp_ocp_fb_board_init(struct ptp_ocp *bp, struct ocp_resource *r);
static irqreturn_t ptp_ocp_ts_irq(int irq, void *priv);
static irqreturn_t ptp_ocp_signal_irq(int irq, void *priv);
static int ptp_ocp_ts_enable(void *priv, u32 req, bool enable);
+static int ptp_ocp_signal_from_perout(struct ptp_ocp *bp, int gen,
+ struct ptp_perout_request *req);
static int ptp_ocp_signal_enable(void *priv, u32 req, bool enable);
static int ptp_ocp_sma_store(struct ptp_ocp *bp, const char *buf, int sma_nr);
@@ -866,13 +868,27 @@ ptp_ocp_enable(struct ptp_clock_info *ptp_info, struct ptp_clock_request *rq,
ext = bp->pps;
break;
case PTP_CLK_REQ_PEROUT:
- if (on &&
- (rq->perout.period.sec != 1 || rq->perout.period.nsec != 0))
- return -EINVAL;
- /* This is a request for 1PPS on an output SMA.
- * Allow, but assume manual configuration.
- */
- return 0;
+ switch (rq->perout.index) {
+ case 0:
+ /* This is a request for 1PPS on an output SMA.
+ * Allow, but assume manual configuration.
+ */
+ if (on && (rq->perout.period.sec != 1 ||
+ rq->perout.period.nsec != 0))
+ return -EINVAL;
+ return 0;
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ req = rq->perout.index - 1;
+ ext = bp->signal_out[req];
+ err = ptp_ocp_signal_from_perout(bp, req, &rq->perout);
+ if (err)
+ return err;
+ break;
+ }
+ break;
default:
return -EOPNOTSUPP;
}
@@ -884,6 +900,24 @@ ptp_ocp_enable(struct ptp_clock_info *ptp_info, struct ptp_clock_request *rq,
return err;
}
+static int
+ptp_ocp_verify(struct ptp_clock_info *ptp_info, unsigned pin,
+ enum ptp_pin_function func, unsigned chan)
+{
+ struct ptp_ocp *bp = container_of(ptp_info, struct ptp_ocp, ptp_info);
+ char buf[16];
+
+ if (func != PTP_PF_PEROUT)
+ return -EOPNOTSUPP;
+
+ if (chan)
+ sprintf(buf, "OUT: GEN%d", chan);
+ else
+ sprintf(buf, "OUT: PHC");
+
+ return ptp_ocp_sma_store(bp, buf, pin + 1);
+}
+
static const struct ptp_clock_info ptp_ocp_clock_info = {
.owner = THIS_MODULE,
.name = KBUILD_MODNAME,
@@ -894,9 +928,10 @@ static const struct ptp_clock_info ptp_ocp_clock_info = {
.adjfine = ptp_ocp_null_adjfine,
.adjphase = ptp_ocp_null_adjphase,
.enable = ptp_ocp_enable,
+ .verify = ptp_ocp_verify,
.pps = true,
.n_ext_ts = 4,
- .n_per_out = 1,
+ .n_per_out = 5,
};
static void
@@ -1463,6 +1498,30 @@ ptp_ocp_signal_set(struct ptp_ocp *bp, int gen, struct ptp_ocp_signal *s)
return 0;
}
+static int
+ptp_ocp_signal_from_perout(struct ptp_ocp *bp, int gen,
+ struct ptp_perout_request *req)
+{
+ struct ptp_ocp_signal s = { };
+
+ s.polarity = bp->signal[gen].polarity;
+ s.period = ktime_set(req->period.sec, req->period.nsec);
+ if (!s.period)
+ return 0;
+
+ if (req->flags & PTP_PEROUT_DUTY_CYCLE) {
+ s.pulse = ktime_set(req->on.sec, req->on.nsec);
+ s.duty = ktime_divns(s.pulse * 100, s.period);
+ }
+
+ if (req->flags & PTP_PEROUT_PHASE)
+ s.phase = ktime_set(req->phase.sec, req->phase.nsec);
+ else
+ s.start = ktime_set(req->start.sec, req->start.nsec);
+
+ return ptp_ocp_signal_set(bp, gen, &s);
+}
+
static int
ptp_ocp_signal_enable(void *priv, u32 req, bool enable)
{
@@ -1738,11 +1797,32 @@ ptp_ocp_sma_init(struct ptp_ocp *bp)
}
}
+static int
+ptp_ocp_fb_set_pins(struct ptp_ocp *bp)
+{
+ struct ptp_pin_desc *config;
+ int i;
+
+ config = kzalloc(sizeof(*config) * 4, GFP_KERNEL);
+ if (!config)
+ return -ENOMEM;
+
+ for (i = 0; i < 4; i++) {
+ sprintf(config[i].name, "sma%d", i + 1);
+ config[i].index = i;
+ }
+
+ bp->ptp_info.n_pins = 4;
+ bp->ptp_info.pin_config = config;
+
+ return 0;
+}
+
/* FB specific board initializers; last "resource" registered. */
static int
ptp_ocp_fb_board_init(struct ptp_ocp *bp, struct ocp_resource *r)
{
- int ver;
+ int ver, err;
bp->flash_start = 1024 * 4096;
bp->eeprom_map = fb_eeprom_map;
@@ -1759,6 +1839,10 @@ ptp_ocp_fb_board_init(struct ptp_ocp *bp, struct ocp_resource *r)
ptp_ocp_sma_init(bp);
ptp_ocp_signal_init(bp);
+ err = ptp_ocp_fb_set_pins(bp);
+ if (err)
+ return err;
+
return ptp_ocp_init_clock(bp);
}
@@ -3236,6 +3320,7 @@ ptp_ocp_detach(struct ptp_ocp *bp)
pci_free_irq_vectors(bp->pdev);
if (bp->ptp)
ptp_clock_unregister(bp->ptp);
+ kfree(bp->ptp_info.pin_config);
device_unregister(&bp->dev);
}
--
2.31.1
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