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Date: Wed, 22 Jun 2022 03:06:51 +0300
From: Vadim Fedorenko <vfedorenko@...ek.ru>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Vadim Fedorenko <vadfed@...com>, Aya Levin <ayal@...dia.com>,
Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>,
netdev@...r.kernel.org, linux-arm-kernel@...r.kernel.org
Subject: [RFC PATCH 3/3] ptp_ocp: implement DPLL ops
From: Vadim Fedorenko <vadfed@...com>
Implement DPLL operations in ptp_ocp driver.
Signed-off-by: Vadim Fedorenko <vadfed@...com>
---
drivers/ptp/Kconfig | 1 +
drivers/ptp/ptp_ocp.c | 85 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 86 insertions(+)
diff --git a/drivers/ptp/Kconfig b/drivers/ptp/Kconfig
index 458218f88c5e..f74846ebc177 100644
--- a/drivers/ptp/Kconfig
+++ b/drivers/ptp/Kconfig
@@ -176,6 +176,7 @@ config PTP_1588_CLOCK_OCP
depends on !S390
depends on COMMON_CLK
select NET_DEVLINK
+ select DPLL
help
This driver adds support for an OpenCompute time card.
diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c
index e59ea2173aac..b7bdb210514d 100644
--- a/drivers/ptp/ptp_ocp.c
+++ b/drivers/ptp/ptp_ocp.c
@@ -21,6 +21,7 @@
#include <linux/mtd/mtd.h>
#include <linux/nvmem-consumer.h>
#include <linux/crc16.h>
+#include <uapi/linux/dpll.h>
#define PCI_VENDOR_ID_FACEBOOK 0x1d9b
#define PCI_DEVICE_ID_FACEBOOK_TIMECARD 0x0400
@@ -336,6 +337,7 @@ struct ptp_ocp {
struct ptp_ocp_signal signal[4];
struct ptp_ocp_sma_connector sma[4];
const struct ocp_sma_op *sma_op;
+ struct dpll_device *dpll;
};
#define OCP_REQ_TIMESTAMP BIT(0)
@@ -3713,6 +3715,81 @@ ptp_ocp_detach(struct ptp_ocp *bp)
device_unregister(&bp->dev);
}
+static int ptp_ocp_dpll_get_status(struct dpll_device *dpll)
+{
+ struct ptp_ocp *bp = (struct ptp_ocp *)dpll->priv;
+ int sync;
+
+ sync = ioread32(&bp->reg->status) & OCP_STATUS_IN_SYNC;
+ return sync;
+}
+
+static int ptp_ocp_dpll_get_lock_status(struct dpll_device *dpll)
+{
+ struct ptp_ocp *bp = (struct ptp_ocp *)dpll->priv;
+ int sync;
+
+ sync = ioread32(&bp->reg->status) & OCP_STATUS_IN_SYNC;
+ return sync;
+}
+
+static int ptp_ocp_dpll_get_source_type(struct dpll_device *dpll, int sma)
+{
+ struct ptp_ocp *bp = (struct ptp_ocp *)dpll->priv;
+ int ret;
+
+ if (bp->sma[sma].mode != SMA_MODE_IN)
+ return -1;
+
+ switch (ptp_ocp_sma_get(bp, sma)) {
+ case 0:
+ ret = DPLL_TYPE_EXT_10MHZ;
+ break;
+ case 1:
+ case 2:
+ ret = DPLL_TYPE_EXT_1PPS;
+ break;
+ default:
+ ret = DPLL_TYPE_INT_OSCILLATOR;
+ }
+
+ return ret;
+}
+
+
+static int ptp_ocp_dpll_get_output_type(struct dpll_device *dpll, int sma)
+{
+ struct ptp_ocp *bp = (struct ptp_ocp *)dpll->priv;
+ int ret;
+
+ if (bp->sma[sma].mode != SMA_MODE_IN)
+ return -1;
+
+ switch (ptp_ocp_sma_get(bp, sma)) {
+ case 0:
+ ret = DPLL_TYPE_EXT_10MHZ;
+ break;
+ case 1:
+ case 2:
+ ret = DPLL_TYPE_INT_OSCILLATOR;
+ case 4:
+ case 8:
+ ret = DPLL_TYPE_GNSS;
+ break;
+ default:
+ ret = DPLL_TYPE_INT_OSCILLATOR;
+ }
+
+ return ret;
+}
+
+static struct dpll_device_ops ptp_ocp_dpll_ops {
+ .get_status = ptp_ocp_dpll_get_status;
+ .get_lock_status = ptp_ocp_dpll_get_lock_status;
+ .get_source_type = ptp_ocp_dpll_get_source_type;
+ .get_output_type = ptp_ocp_dpll_get_output_type;
+};
+
static int
ptp_ocp_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
@@ -3768,6 +3845,14 @@ ptp_ocp_probe(struct pci_dev *pdev, const struct pci_device_id *id)
ptp_ocp_info(bp);
devlink_register(devlink);
+
+ bp->dpll = dpll_device_alloc(&dpll_ops, ARRAY_SIZE(bp->sma), ARRAY_SIZE(bp->sma));
+ if (!bp->dpll) {
+ dev_err(&pdev->dev, "dpll_device_alloc failed\n");
+ return 0;
+ }
+ dpll_device_register(bp->dpll);
+
return 0;
out:
--
2.27.0
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