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net: dsa: microchip: ksz8795: add phylink support 

This patch adds the phylink support to the ksz8795 driver to provide
configuration exceptions on quirky KSZ8863 and KSZ8873 ports.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Grzeschik 2021-06-14 06:31:19 +02:00 committed by David S. Miller
parent ec4b94f9b3
commit 2c709e0bda
1 changed files with 55 additions and 0 deletions
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55
drivers/net/dsa/microchip/ksz8795.c
View File

@ -18,6 +18,7 @@
#include <linux/micrel_phy.h>
#include <net/dsa.h>
#include <net/switchdev.h>
#include <linux/phylink.h>
#include "ksz_common.h"
#include "ksz8795_reg.h"
@ -1420,11 +1421,65 @@ static int ksz8_setup(struct dsa_switch *ds)
return 0;
}
static void ksz8_validate(struct dsa_switch *ds, int port,
unsigned long *supported,
struct phylink_link_state *state)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
struct ksz_device *dev = ds->priv;
if (port == dev->cpu_port) {
if (state->interface != PHY_INTERFACE_MODE_RMII &&
state->interface != PHY_INTERFACE_MODE_MII &&
state->interface != PHY_INTERFACE_MODE_NA)
goto unsupported;
} else {
if (state->interface != PHY_INTERFACE_MODE_INTERNAL &&
state->interface != PHY_INTERFACE_MODE_NA)
goto unsupported;
}
/* Allow all the expected bits */
phylink_set_port_modes(mask);
phylink_set(mask, Autoneg);
/* Silicon Errata Sheet (DS80000830A):
* "Port 1 does not respond to received flow control PAUSE frames"
* So, disable Pause support on "Port 1" (port == 0) for all ksz88x3
* switches.
*/
if (!ksz_is_ksz88x3(dev) || port)
phylink_set(mask, Pause);
/* Asym pause is not supported on KSZ8863 and KSZ8873 */
if (!ksz_is_ksz88x3(dev))
phylink_set(mask, Asym_Pause);
/* 10M and 100M are only supported */
phylink_set(mask, 10baseT_Half);
phylink_set(mask, 10baseT_Full);
phylink_set(mask, 100baseT_Half);
phylink_set(mask, 100baseT_Full);
bitmap_and(supported, supported, mask,
__ETHTOOL_LINK_MODE_MASK_NBITS);
bitmap_and(state->advertising, state->advertising, mask,
__ETHTOOL_LINK_MODE_MASK_NBITS);
return;
unsupported:
bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
dev_err(ds->dev, "Unsupported interface: %s, port: %d\n",
phy_modes(state->interface), port);
}
static const struct dsa_switch_ops ksz8_switch_ops = {
.get_tag_protocol = ksz8_get_tag_protocol,
.setup = ksz8_setup,
.phy_read = ksz_phy_read16,
.phy_write = ksz_phy_write16,
.phylink_validate = ksz8_validate,
.phylink_mac_link_down = ksz_mac_link_down,
.port_enable = ksz_enable_port,
.get_strings = ksz8_get_strings,