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realtek: pcs: rtl93xx: handle XSGMII autoneg

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The XSGMII mode is special in several regards. The inband
autonegotiation for this mode is called 'XSG N-way'. It is controlled
using different bits and location, and using XSG operations.

Add support for this by enhancing the set_autoneg implementation shared
by RTL930x and RTL931x. This can stay shared since it works the same for
both variants.

Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/21762
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Jonas Jelonek 2026-01-26 23:20:26 +00:00 • committed by Hauke Mehrtens
parent fb23888376
commit 0d2d9ecb7f
1 changed files with 11 additions and 2 deletions
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13
target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c
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@ -948,9 +948,18 @@ static int rtpcs_839x_setup_serdes(struct rtpcs_serdes *sds,
static int rtpcs_93xx_sds_set_autoneg(struct rtpcs_serdes *sds, unsigned int neg_mode)
{
u16 bmcr = neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED ? BMCR_ANENABLE : 0;
u16 bmcr, en_val;
return rtpcs_sds_modify(sds, 2, MII_BMCR, BMCR_ANENABLE, bmcr);
switch (sds->hw_mode) {
case RTPCS_SDS_MODE_XSGMII: /* XSG N-way state */
en_val = neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED ? 0x0 : 0x1;
return rtpcs_sds_xsg_write_bits(sds, 0x0, 0x2, 9, 8, en_val);
default:
bmcr = neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED ? BMCR_ANENABLE : 0;
return rtpcs_sds_modify(sds, 0x2, MII_BMCR, BMCR_ANENABLE, bmcr);
}
}
/* RTL930X */