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Fri, 9 Oct 2026 05:10:57 +0000 Received: by hermes--production-ir2-5dd9bf4598-ztwl7 (Yahoo Inc. Hermes SMTP Server) with ESMTPA ID bdf7bea4b2dfe1c386d043e78a785697; Fri, 09 Oct 2026 05:00:40 +0000 (UTC) Message-ID: Date: Fri, 9 Oct 2026 07:00:34 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: [PATCH net-next v2 7/8] net: dsa: realtek: rtl8365mb: add family D SDS13 PCS support From: Mieczyslaw Nalewaj To: linusw@kernel.org, alsi@bang-olufsen.dk, andrew@lunn.ch, olteanv@gmail.com, kuba@kernel.org, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, linux@armlinux.org.uk, luizluca@gmail.com, maxime.chevallier@bootlin.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org References: <28382f3f-03c1-4606-9b11-86f118abeafe@yahoo.com> Content-Language: pl In-Reply-To: <28382f3f-03c1-4606-9b11-86f118abeafe@yahoo.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Mailer: WebService/1.1.26668 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo Extend the existing RTL8367S SGMII/HSGMII PCS implementation in this driver for family D switches, whose CPU SerDes is reached through the indexed SDS13 window and whose SDS_MISC fields differ from family C. The register sequence and tuning tables are derived from the GPL-licensed Realtek RTL8367D port API distributed in the Mercusys MR80X GPL release. Keep the existing family C path unchanged and select the new behavior from the driver's chip-family metadata, making the implementation reusable by other family D boards. Co-developed-by: Fabiano Tassotti Signed-off-by: Fabiano Tassotti Signed-off-by: Mieczyslaw Nalewaj --- drivers/net/dsa/realtek/rtl8365mb_main.c | 181 ++++++++++++++++++----- 1 file changed, 145 insertions(+), 36 deletions(-) diff --git a/drivers/net/dsa/realtek/rtl8365mb_main.c b/drivers/net/dsa/realtek/rtl8365mb_main.c index 3819a48..4cad90f 100644 --- a/drivers/net/dsa/realtek/rtl8365mb_main.c +++ b/drivers/net/dsa/realtek/rtl8365mb_main.c @@ -286,6 +286,7 @@ #define RTL8365MB_SDS_INDACS_CMD_BUSY_MASK BIT(8) #define RTL8365MB_SDS_INDACS_CMD_RUN_MASK BIT(7) #define RTL8365MB_SDS_INDACS_CMD_WR_MASK BIT(6) +#define RTL8365MB_SDS_INDACS_CMD_INDEX_MASK GENMASK(5, 0) #define RTL8365MB_SDS_INDACS_ADR_REG 0x6601 #define RTL8365MB_SDS_INDACS_DATA_REG 0x6602 @@ -334,7 +335,22 @@ #define RTL8365MB_SDS_OPTION_ARM_KEY 0x0249 #define RTL8365MB_SDS_OPTION_REG 0x13C1 +/* Family D uses the SDS13 indirect window for its MAC6 SerDes. */ +#define RTL8365MB_D_SDS_EXT0_INDEX 13 +#define RTL8365MB_D_FIBER_CFG2_REG 0x13E8 +#define RTL8365MB_D_FIBER_CFG2_RX_DISABLE_MASK GENMASK(7, 6) +#define RTL8365MB_D_FIBER_CFG2_RX_DISABLE_SDS0 BIT(6) +#define RTL8365MB_D_SDS_MISC_PA33PC_EN BIT(11) +#define RTL8365MB_D_SDS_MISC_PA12PC_EN BIT(10) +#define RTL8365MB_D_SDS_MISC_MAC6_SEL_SDS0 BIT(9) #define RTL8365MB_D_SDS_MISC_MODE_FIELD_MASK GENMASK(4, 0) +#define RTL8365MB_D_SDS_MISC_MODE_SGMII 0x02 +#define RTL8365MB_D_SDS_MISC_MODE_HSGMII 0x12 +#define RTL8365MB_D_SDS_MISC_CFG_MASK \ + (RTL8365MB_D_SDS_MISC_PA33PC_EN | \ + RTL8365MB_D_SDS_MISC_PA12PC_EN | \ + RTL8365MB_D_SDS_MISC_MAC6_SEL_SDS0 | \ + RTL8365MB_D_SDS_MISC_MODE_FIELD_MASK) /* Shared "disable" encoding for both SDS_MISC's and SDS1_MISC0's * 5-bit mode fields. */ @@ -714,6 +730,21 @@ static const struct rtl8365mb_jam_tbl_entry rtl8365mb_sds_jam_hsgmii[] = { { 0x0424, 0xD810 }, { 0x0001, 0x0F80 }, { 0x002E, 0x83F2 }, }; +/* Family D tuning tables from the Realtek vendor port API. */ +static const struct rtl8365mb_jam_tbl_entry rtl8365mb_d_sds_jam_sgmii[] = { + { 0x0427, 0x4E0C }, { 0x0428, 0xAA00 }, { 0x0425, 0x5189 }, + { 0x0424, 0x8414 }, { 0x0423, 0x1020 }, { 0x0410, 0x0002 }, + { 0x0484, 0x011B }, { 0x0421, 0x8E13 }, { 0x0422, 0x1140 }, + { 0x0004, 0x074F }, +}; + +static const struct rtl8365mb_jam_tbl_entry rtl8365mb_d_sds_jam_hsgmii[] = { + { 0x0427, 0x4E0C }, { 0x0428, 0xAA00 }, { 0x0425, 0x5189 }, + { 0x0424, 0x8414 }, { 0x0423, 0x1020 }, { 0x0410, 0x0002 }, + { 0x0504, 0x051B }, { 0x0421, 0x8E13 }, { 0x0422, 0x1140 }, + { 0x0004, 0x074F }, +}; + enum rtl8365mb_phy_interface_mode { RTL8365MB_PHY_INTERFACE_MODE_INVAL = 0, RTL8365MB_PHY_INTERFACE_MODE_INTERNAL = BIT(0), @@ -1327,7 +1358,8 @@ static int rtl8365mb_ext_config_rgmii(struct realtek_priv *priv, int port, return 0; } -static int rtl8365mb_sds_write(struct realtek_priv *priv, u16 addr, u16 data) +static int rtl8365mb_sds_write(struct realtek_priv *priv, u8 index, + u16 addr, u16 data) { int ret; @@ -1345,10 +1377,13 @@ static int rtl8365mb_sds_write(struct realtek_priv *priv, u16 addr, u16 data) */ return regmap_write(priv->map, RTL8365MB_SDS_INDACS_CMD_REG, RTL8365MB_SDS_INDACS_CMD_RUN_MASK | - RTL8365MB_SDS_INDACS_CMD_WR_MASK); + RTL8365MB_SDS_INDACS_CMD_WR_MASK | + FIELD_PREP(RTL8365MB_SDS_INDACS_CMD_INDEX_MASK, + index)); } -static int rtl8365mb_sds_read(struct realtek_priv *priv, u16 addr, u16 *data) +static int rtl8365mb_sds_read(struct realtek_priv *priv, u8 index, + u16 addr, u16 *data) { u32 val; int ret; @@ -1358,7 +1393,9 @@ static int rtl8365mb_sds_read(struct realtek_priv *priv, u16 addr, u16 *data) return ret; ret = regmap_write(priv->map, RTL8365MB_SDS_INDACS_CMD_REG, - RTL8365MB_SDS_INDACS_CMD_RUN_MASK); + RTL8365MB_SDS_INDACS_CMD_RUN_MASK | + FIELD_PREP(RTL8365MB_SDS_INDACS_CMD_INDEX_MASK, + index)); if (ret) return ret; @@ -1398,6 +1435,14 @@ static int rtl8365mb_sds_probe_option(struct realtek_priv *priv) int ret; int i; + /* Family D has a fixed SDS13 programming model and does not use the + * family C option register to select its tuning table. + */ + if (rtl8365mb_get_family(priv) == RTL8365MB_FAMILY_D) { + mb->sds_supported = true; + return 0; + } + /* Nothing to probe if no external interface is wired to the SerDes */ for (i = 0; i < RTL8365MB_MAX_NUM_EXTINTS; i++) { extint = &mb->chip_info->extints[i]; @@ -1476,28 +1521,47 @@ static int rtl8365mb_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, const unsigned long *advertising, bool permit_pause_to_mac) { - const struct rtl8365mb_jam_tbl_entry *sds_jam; const int id = RTL8365MB_SDS_EXT_INTERFACE_ID; + const struct rtl8365mb_jam_tbl_entry *sds_jam; struct rtl8365mb *mb = pcs_to_rtl8365mb(pcs); - struct realtek_priv *priv; + struct realtek_priv *priv = mb->priv; size_t sds_jam_size; - u32 mode; + u32 misc_mask; + u32 misc_val; + u32 sds_mode; + u8 sds_index; + bool is_d; u16 val; int ret; int i; - priv = mb->priv; + is_d = rtl8365mb_get_family(priv) == RTL8365MB_FAMILY_D; + /* Select the appropriate tuning table and SDS mode */ if (interface == PHY_INTERFACE_MODE_2500BASEX) { - sds_jam = rtl8365mb_sds_jam_hsgmii; - sds_jam_size = ARRAY_SIZE(rtl8365mb_sds_jam_hsgmii); - mode = RTL8365MB_EXT_PORT_MODE_HSGMII; + if (is_d) { + sds_jam = rtl8365mb_d_sds_jam_hsgmii; + sds_jam_size = ARRAY_SIZE(rtl8365mb_d_sds_jam_hsgmii); + sds_mode = RTL8365MB_D_SDS_MISC_MODE_HSGMII; + } else { + sds_jam = rtl8365mb_sds_jam_hsgmii; + sds_jam_size = ARRAY_SIZE(rtl8365mb_sds_jam_hsgmii); + sds_mode = RTL8365MB_EXT_PORT_MODE_HSGMII; + } } else { - sds_jam = rtl8365mb_sds_jam_sgmii; - sds_jam_size = ARRAY_SIZE(rtl8365mb_sds_jam_sgmii); - mode = RTL8365MB_EXT_PORT_MODE_SGMII; + if (is_d) { + sds_jam = rtl8365mb_d_sds_jam_sgmii; + sds_jam_size = ARRAY_SIZE(rtl8365mb_d_sds_jam_sgmii); + sds_mode = RTL8365MB_D_SDS_MISC_MODE_SGMII; + } else { + sds_jam = rtl8365mb_sds_jam_sgmii; + sds_jam_size = ARRAY_SIZE(rtl8365mb_sds_jam_sgmii); + sds_mode = RTL8365MB_EXT_PORT_MODE_SGMII; + } } + sds_index = is_d ? RTL8365MB_D_SDS_EXT0_INDEX : 0; + /* Hold the embedded DW8051 microcontroller in reset and keep it * disabled. The vendor driver loads firmware into it to manage the * SerDes link, but the firmware only duplicates work that phylink @@ -1526,34 +1590,53 @@ static int rtl8365mb_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, /* Tune the SerDes with vendor-prescribed parameters */ for (i = 0; i < sds_jam_size; i++) { - ret = rtl8365mb_sds_write(priv, sds_jam[i].reg, - sds_jam[i].val); + ret = rtl8365mb_sds_write(priv, sds_index, + sds_jam[i].reg, sds_jam[i].val); + if (ret) + return ret; + } + + /* Family-specific post-tuning configuration */ + if (is_d) { + ret = regmap_update_bits(priv->map, RTL8365MB_D_FIBER_CFG2_REG, + RTL8365MB_D_FIBER_CFG2_RX_DISABLE_MASK, + RTL8365MB_D_FIBER_CFG2_RX_DISABLE_SDS0); if (ret) return ret; + + misc_mask = RTL8365MB_D_SDS_MISC_CFG_MASK; + misc_val = RTL8365MB_D_SDS_MISC_PA33PC_EN | + RTL8365MB_D_SDS_MISC_PA12PC_EN | + RTL8365MB_D_SDS_MISC_MAC6_SEL_SDS0 | sds_mode; + } else { + /* Mux the SerDes to MAC8 in the requested mode */ + misc_mask = RTL8365MB_SDS_MISC_MAC8_SEL_SGMII_MASK | + RTL8365MB_SDS_MISC_MAC8_SEL_HSGMII_MASK; + misc_val = (sds_mode == RTL8365MB_EXT_PORT_MODE_SGMII) ? + RTL8365MB_SDS_MISC_MAC8_SEL_SGMII_MASK : + RTL8365MB_SDS_MISC_MAC8_SEL_HSGMII_MASK; } - /* Mux the SerDes to MAC8 in the requested mode */ ret = regmap_update_bits(priv->map, RTL8365MB_SDS_MISC_REG, - RTL8365MB_SDS_MISC_MAC8_SEL_SGMII_MASK | - RTL8365MB_SDS_MISC_MAC8_SEL_HSGMII_MASK, - mode == RTL8365MB_EXT_PORT_MODE_SGMII ? - RTL8365MB_SDS_MISC_MAC8_SEL_SGMII_MASK : - RTL8365MB_SDS_MISC_MAC8_SEL_HSGMII_MASK); + misc_mask, misc_val); if (ret) return ret; - val = mode << RTL8365MB_DIGITAL_INTERFACE_SELECT_MODE_OFFSET(id); - ret = regmap_update_bits(priv->map, - RTL8365MB_DIGITAL_INTERFACE_SELECT_REG(id), - RTL8365MB_DIGITAL_INTERFACE_SELECT_MODE_MASK(id), - val); - if (ret) - return ret; + if (!is_d) { + val = sds_mode << RTL8365MB_DIGITAL_INTERFACE_SELECT_MODE_OFFSET(id); + ret = regmap_update_bits(priv->map, + RTL8365MB_DIGITAL_INTERFACE_SELECT_REG(id), + RTL8365MB_DIGITAL_INTERFACE_SELECT_MODE_MASK(id), + val); + if (ret) + return ret; + } /* Take the SerDes out of reset. The vendor driver does this only * after the SerDes mux and the interface mode are configured. */ - ret = rtl8365mb_sds_write(priv, RTL8365MB_SDS_REG_RESET, + ret = rtl8365mb_sds_write(priv, sds_index, + RTL8365MB_SDS_REG_RESET, RTL8365MB_SDS_RESET_DEASSERT); if (ret) return ret; @@ -1563,12 +1646,14 @@ static int rtl8365mb_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, * This flushes the FIFOs and ensures a clean state for the link, * preventing silent drops and CRC errors. */ - ret = rtl8365mb_sds_write(priv, RTL8365MB_SDS_REG_BMCR, + ret = rtl8365mb_sds_write(priv, sds_index, + RTL8365MB_SDS_REG_BMCR, RTL8365MB_SDS_BMCR_DPRST_PHASE1); if (ret) return ret; - ret = rtl8365mb_sds_write(priv, RTL8365MB_SDS_REG_BMCR, + ret = rtl8365mb_sds_write(priv, sds_index, + RTL8365MB_SDS_REG_BMCR, RTL8365MB_SDS_BMCR_DPRST_PHASE2); if (ret) return ret; @@ -1576,14 +1661,16 @@ static int rtl8365mb_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode, /* Keep SGMII in-band autonegotiation disabled: the link parameters are * forced from rtl8365mb_pcs_link_up() instead. */ - ret = rtl8365mb_sds_read(priv, RTL8365MB_SDS_REG_NWAY, &val); + ret = rtl8365mb_sds_read(priv, sds_index, + RTL8365MB_SDS_REG_NWAY, &val); if (ret) return ret; val &= ~RTL8365MB_SDS_NWAY_EN_MASK; val |= RTL8365MB_SDS_NWAY_RESTART_MASK; - return rtl8365mb_sds_write(priv, RTL8365MB_SDS_REG_NWAY, val); + return rtl8365mb_sds_write(priv, sds_index, + RTL8365MB_SDS_REG_NWAY, val); } static bool rtl8365mb_interface_is_serdes(phy_interface_t interface) @@ -1608,10 +1695,14 @@ static void rtl8365mb_pcs_get_state(struct phylink_pcs *pcs, { struct rtl8365mb *mb = pcs_to_rtl8365mb(pcs); struct realtek_priv *priv = mb->priv; + u8 sds_index = 0; u16 status; + bool is_d; u32 val; int ret; + is_d = rtl8365mb_get_family(priv) == RTL8365MB_FAMILY_D; + /* In-band autonegotiation is not implemented, so the link parameters are * forced from rtl8365mb_pcs_link_up(). The real link state must still be * read from the SerDes itself: the embedded DW8051 microcontroller that @@ -1619,7 +1710,11 @@ static void rtl8365mb_pcs_get_state(struct phylink_pcs *pcs, * rtl8365mb_pcs_config()), so the link status register can be read * directly through the SDS_INDACS window without racing the auto-poll. */ - ret = rtl8365mb_sds_read(priv, RTL8365MB_SDS_REG_LINK_STATUS, &status); + if (is_d) + sds_index = RTL8365MB_D_SDS_EXT0_INDEX; + + ret = rtl8365mb_sds_read(priv, sds_index, + RTL8365MB_SDS_REG_LINK_STATUS, &status); if (ret) { state->link = false; return; @@ -1630,6 +1725,13 @@ static void rtl8365mb_pcs_get_state(struct phylink_pcs *pcs, if (!state->link) return; + if (is_d) { + state->duplex = DUPLEX_FULL; + state->speed = state->interface == PHY_INTERFACE_MODE_2500BASEX ? + SPEED_2500 : SPEED_1000; + return; + } + /* The speed and duplex are forced; read them back from the values * programmed into the SerDes MISC register. */ @@ -1671,6 +1773,12 @@ static void rtl8365mb_pcs_link_up(struct phylink_pcs *pcs, u32 r_speed; int ret; + /* Family D forces the external MAC ability from mac_link_up(); its + * SDS_MISC fields do not share the family C link-force layout. + */ + if (rtl8365mb_get_family(priv) == RTL8365MB_FAMILY_D) + return; + /* The speed field has no value for 2.5 Gbps: the rate is determined by * the HSGMII SerDes configuration, and the vendor driver programs the * 1 Gbps value here. @@ -1997,7 +2105,8 @@ static void rtl8365mb_phylink_mac_link_up(struct phylink_config *config, * rtl8365mb_pcs_link_up() because pcs_link_up() carries no * pause information. */ - if (rtl8365mb_interface_is_serdes(interface)) { + if (rtl8365mb_interface_is_serdes(interface) && + rtl8365mb_get_family(priv) != RTL8365MB_FAMILY_D) { u32 val = 0; if (tx_pause) -- 2.53.0