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ptp: ocp: add TOD debug information 

TOD information is currently displayed only on module load,
which doesn't provide updated information as the system runs.

Create a debug file which provides the current TOD status information,
and move the information display there.

Signed-off-by: Vadim Fedorenko <vadfed@fb.com>
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vadim Fedorenko 2022-03-02 13:34:55 -08:00 committed by David S. Miller
parent 01e2d15796
commit 9f492c4cb2
1 changed files with 70 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

106
drivers/ptp/ptp_ocp.c
View File

@ -88,9 +88,10 @@ struct tod_reg {
#define TOD_CTRL_GNSS_MASK ((1U << 4) - 1)
#define TOD_CTRL_GNSS_SHIFT 24
#define TOD_STATUS_UTC_MASK 0xff
#define TOD_STATUS_UTC_VALID BIT(8)
#define TOD_STATUS_LEAP_VALID BIT(16)
#define TOD_STATUS_UTC_MASK 0xff
#define TOD_STATUS_UTC_VALID BIT(8)
#define TOD_STATUS_LEAP_ANNOUNCE BIT(12)
#define TOD_STATUS_LEAP_VALID BIT(16)
struct ts_reg {
u32 enable;
@ -862,45 +863,26 @@ ptp_ocp_tod_init(struct ptp_ocp *bp)
ptp_ocp_utc_distribute(bp, reg & TOD_STATUS_UTC_MASK);
}
static void
ptp_ocp_tod_info(struct ptp_ocp *bp)
static const char *
ptp_ocp_tod_proto_name(const int idx)
{
static const char * const proto_name[] = {
"NMEA", "NMEA_ZDA", "NMEA_RMC", "NMEA_none",
"UBX", "UBX_UTC", "UBX_LS", "UBX_none"
};
return proto_name[idx];
}
static const char *
ptp_ocp_tod_gnss_name(int idx)
{
static const char * const gnss_name[] = {
"ALL", "COMBINED", "GPS", "GLONASS", "GALILEO", "BEIDOU",
"Unknown"
};
u32 version, ctrl, reg;
int idx;
version = ioread32(&bp->tod->version);
dev_info(&bp->pdev->dev, "TOD Version %d.%d.%d\n",
version >> 24, (version >> 16) & 0xff, version & 0xffff);
ctrl = ioread32(&bp->tod->ctrl);
idx = ctrl & TOD_CTRL_PROTOCOL ? 4 : 0;
idx += (ctrl >> 16) & 3;
dev_info(&bp->pdev->dev, "control: %x\n", ctrl);
dev_info(&bp->pdev->dev, "TOD Protocol %s %s\n", proto_name[idx],
ctrl & TOD_CTRL_ENABLE ? "enabled" : "");
idx = (ctrl >> TOD_CTRL_GNSS_SHIFT) & TOD_CTRL_GNSS_MASK;
if (idx < ARRAY_SIZE(gnss_name))
dev_info(&bp->pdev->dev, "GNSS %s\n", gnss_name[idx]);
reg = ioread32(&bp->tod->status);
dev_info(&bp->pdev->dev, "status: %x\n", reg);
reg = ioread32(&bp->tod->adj_sec);
dev_info(&bp->pdev->dev, "correction: %d\n", reg);
reg = ioread32(&bp->tod->utc_status);
dev_info(&bp->pdev->dev, "utc_status: %x\n", reg);
dev_info(&bp->pdev->dev, "utc_offset: %d valid:%d leap_valid:%d\n",
reg & TOD_STATUS_UTC_MASK, reg & TOD_STATUS_UTC_VALID ? 1 : 0,
reg & TOD_STATUS_LEAP_VALID ? 1 : 0);
if (idx > ARRAY_SIZE(gnss_name))
idx = ARRAY_SIZE(gnss_name) - 1;
return gnss_name[idx];
}
static int
@ -2179,6 +2161,57 @@ ptp_ocp_summary_show(struct seq_file *s, void *data)
}
DEFINE_SHOW_ATTRIBUTE(ptp_ocp_summary);
static int
ptp_ocp_tod_status_show(struct seq_file *s, void *data)
{
struct device *dev = s->private;
struct ptp_ocp *bp;
u32 val;
int idx;
bp = dev_get_drvdata(dev);
val = ioread32(&bp->tod->ctrl);
if (!(val & TOD_CTRL_ENABLE)) {
seq_printf(s, "TOD Slave disabled\n");
return 0;
}
seq_printf(s, "TOD Slave enabled, Control Register 0x%08X\n", val);
idx = val & TOD_CTRL_PROTOCOL ? 4 : 0;
idx += (val >> 16) & 3;
seq_printf(s, "Protocol %s\n", ptp_ocp_tod_proto_name(idx));
idx = (val >> TOD_CTRL_GNSS_SHIFT) & TOD_CTRL_GNSS_MASK;
seq_printf(s, "GNSS %s\n", ptp_ocp_tod_gnss_name(idx));
val = ioread32(&bp->tod->version);
seq_printf(s, "TOD Version %d.%d.%d\n",
val >> 24, (val >> 16) & 0xff, val & 0xffff);
val = ioread32(&bp->tod->status);
seq_printf(s, "Status register: 0x%08X\n", val);
val = ioread32(&bp->tod->adj_sec);
idx = (val & ~INT_MAX) ? -1 : 1;
idx *= (val & INT_MAX);
seq_printf(s, "Correction seconds: %d\n", idx);
val = ioread32(&bp->tod->utc_status);
seq_printf(s, "UTC status register: 0x%08X\n", val);
seq_printf(s, "UTC offset: %d valid:%d\n",
val & TOD_STATUS_UTC_MASK, val & TOD_STATUS_UTC_VALID ? 1 : 0);
seq_printf(s, "Leap second info valid:%d, Leap second announce %d\n",
val & TOD_STATUS_LEAP_VALID ? 1 : 0,
val & TOD_STATUS_LEAP_ANNOUNCE ? 1 : 0);
val = ioread32(&bp->tod->leap);
seq_printf(s, "Time to next leap second (in sec): %d\n", (s32) val);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(ptp_ocp_tod_status);
static struct dentry *ptp_ocp_debugfs_root;
static void
@ -2190,6 +2223,9 @@ ptp_ocp_debugfs_add_device(struct ptp_ocp *bp)
bp->debug_root = d;
debugfs_create_file("summary", 0444, bp->debug_root,
&bp->dev, &ptp_ocp_summary_fops);
if (bp->tod)
debugfs_create_file("tod_status", 0444, bp->debug_root,
&bp->dev, &ptp_ocp_tod_status_fops);
}
static void
@ -2368,8 +2404,6 @@ ptp_ocp_info(struct ptp_ocp *bp)
u32 reg;
ptp_ocp_phc_info(bp);
if (bp->tod)
ptp_ocp_tod_info(bp);
if (bp->image) {
u32 ver = ioread32(&bp->image->version);