diff options
| author | Oleksij Rempel <o.rempel@pengutronix.de> | 2021-06-14 06:31:25 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-14 12:54:43 -0700 |
| commit | 49011e0c1555dd7a689d0f32fd78c1ecd43e59cd (patch) | |
| tree | 6419850c016f2e0f5acb59ce2ab6f4c0c6bd42b1 /drivers/net/dsa/microchip/ksz8795.c | |
| parent | c916e8e1ea724db0f7bae36c11aaadc631226321 (diff) | |
| download | linux-49011e0c1555dd7a689d0f32fd78c1ecd43e59cd.tar.bz2 | |
net: phy: micrel: ksz886x/ksz8081: add cabletest support
This patch support for cable test for the ksz886x switches and the
ksz8081 PHY.
The patch was tested on a KSZ8873RLL switch with following results:
- port 1:
- provides invalid values, thus return -ENOTSUPP
(Errata: DS80000830A: "LinkMD does not work on Port 1",
http://ww1.microchip.com/downloads/en/DeviceDoc/KSZ8873-Errata-DS80000830A.pdf)
- port 2:
- can detect distance
- can detect open on each wire of pair A (wire 1 and 2)
- can detect open only on one wire of pair B (only wire 3)
- can detect short between wires of a pair (wires 1 + 2 or 3 + 6)
- short between pairs is detected as open.
For example short between wires 2 + 3 is detected as open.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa/microchip/ksz8795.c')
| -rw-r--r-- | drivers/net/dsa/microchip/ksz8795.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c index e1731ae4497d..560f6843bb65 100644 --- a/drivers/net/dsa/microchip/ksz8795.c +++ b/drivers/net/dsa/microchip/ksz8795.c @@ -970,6 +970,18 @@ static enum dsa_tag_protocol ksz8_get_tag_protocol(struct dsa_switch *ds, DSA_TAG_PROTO_KSZ9893 : DSA_TAG_PROTO_KSZ8795; } +static u32 ksz8_sw_get_phy_flags(struct dsa_switch *ds, int port) +{ + /* Silicon Errata Sheet (DS80000830A): + * Port 1 does not work with LinkMD Cable-Testing. + * Port 1 does not respond to received PAUSE control frames. + */ + if (!port) + return MICREL_KSZ8_P1_ERRATA; + + return 0; +} + static void ksz8_get_strings(struct dsa_switch *ds, int port, u32 stringset, uint8_t *buf) { @@ -1503,6 +1515,7 @@ unsupported: static const struct dsa_switch_ops ksz8_switch_ops = { .get_tag_protocol = ksz8_get_tag_protocol, + .get_phy_flags = ksz8_sw_get_phy_flags, .setup = ksz8_setup, .phy_read = ksz_phy_read16, .phy_write = ksz_phy_write16, |