git: fe1c0e6d2af0 - stable/13 - cgem: support SGMII PHY connection mode

The branch stable/13 has been updated by mhorne:

URL: https://cgit.FreeBSD.org/src/commit/?id=fe1c0e6d2af0edf6c0353020d702a47caacf69ac

commit fe1c0e6d2af0edf6c0353020d702a47caacf69ac
Author:     Milan Obuch <bsd@dino.sk>
AuthorDate: 2022-04-07 13:04:18 +0000
Commit:     Mitchell Horne <mhorne@FreeBSD.org>
CommitDate: 2022-05-16 13:34:04 +0000

    cgem: support SGMII PHY connection mode
    
    As the PolarFire SoC needs SGMII to connect the PHY, check the
    'phy-mode' property of device tree node for ethernet and act on it
    appropriately.
    
    Add the compatible strings for the PolarFire SoC device tree.
    'microchip,mpfs-mss-gem" is not officially documented but has been
    observed in the available firmware for this platform, so it is included
    for now.
    
    Also, fix a typo in if_cgem_hw.h.
    
    Reviewed by:    mhorne
    MFC after:      1 week
    Sponsored by:   Conclusive Engineering
    Differential Revision: https://reviews.freebsd.org/D34764
    
    (cherry picked from commit 34f4c17a2b3df50e9badd030edba187d6acf3b87)
---
 sys/dev/cadence/if_cgem.c    | 14 ++++++++++++++
 sys/dev/cadence/if_cgem_hw.h |  2 +-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/sys/dev/cadence/if_cgem.c b/sys/dev/cadence/if_cgem.c
index 979ca524c624..948e1c6b6c69 100644
--- a/sys/dev/cadence/if_cgem.c
+++ b/sys/dev/cadence/if_cgem.c
@@ -76,6 +76,7 @@ __FBSDID("$FreeBSD$");
 
 #include <dev/mii/mii.h>
 #include <dev/mii/miivar.h>
+#include <dev/mii/mii_fdt.h>
 
 #include <dev/extres/clk/clk.h>
 
@@ -109,9 +110,11 @@ __FBSDID("$FreeBSD$");
 static struct ofw_compat_data compat_data[] = {
 	{ "cdns,zynq-gem",		HWQUIRK_RXHANGWAR | HWQUIRK_TXCLK },
 	{ "cdns,zynqmp-gem",		HWQUIRK_NEEDNULLQS | HWQUIRK_TXCLK },
+	{ "microchip,mpfs-mss-gem",	HWQUIRK_NEEDNULLQS | HWQUIRK_TXCLK },
 	{ "sifive,fu540-c000-gem",	HWQUIRK_PCLK },
 	{ "sifive,fu740-c000-gem",	HWQUIRK_PCLK },
 	{ "cdns,gem",			HWQUIRK_NONE },
+	{ "cdns,macb",			HWQUIRK_NONE },
 	{ "cadence,gem",		HWQUIRK_NONE },
 	{ NULL,				0 }
 };
@@ -131,6 +134,7 @@ struct cgem_softc {
 	uint32_t		net_cfg_shadow;
 	clk_t			ref_clk;
 	int			neednullqs;
+	int			phy_contype;
 
 	bus_dma_tag_t		desc_dma_tag;
 	bus_dma_tag_t		mbuf_dma_tag;
@@ -1084,6 +1088,12 @@ cgem_config(struct cgem_softc *sc)
 	    CGEM_NET_CFG_GIGE_EN | CGEM_NET_CFG_1536RXEN |
 	    CGEM_NET_CFG_FULL_DUPLEX | CGEM_NET_CFG_SPEED100);
 
+	/* Check connection type, enable SGMII bits if necessary. */
+	if (sc->phy_contype == MII_CONTYPE_SGMII) {
+		sc->net_cfg_shadow |= CGEM_NET_CFG_SGMII_EN;
+		sc->net_cfg_shadow |= CGEM_NET_CFG_PCS_SEL;
+	}
+
 	/* Enable receive checksum offloading? */
 	if ((if_getcapenable(ifp) & IFCAP_RXCSUM) != 0)
 		sc->net_cfg_shadow |=  CGEM_NET_CFG_RX_CHKSUM_OFFLD_EN;
@@ -1728,6 +1738,7 @@ cgem_attach(device_t dev)
 	int rid, err;
 	u_char eaddr[ETHER_ADDR_LEN];
 	int hwquirks;
+	phandle_t node;
 
 	sc->dev = dev;
 	CGEM_LOCK_INIT(sc);
@@ -1753,6 +1764,9 @@ cgem_attach(device_t dev)
 			device_printf(dev, "could not enable clock.\n");
 	}
 
+	node = ofw_bus_get_node(dev);
+	sc->phy_contype = mii_fdt_get_contype(node);
+
 	/* Get memory resource. */
 	rid = 0;
 	sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
diff --git a/sys/dev/cadence/if_cgem_hw.h b/sys/dev/cadence/if_cgem_hw.h
index 784b131a885e..afba8f7dfcd7 100644
--- a/sys/dev/cadence/if_cgem_hw.h
+++ b/sys/dev/cadence/if_cgem_hw.h
@@ -63,7 +63,7 @@
 #define   CGEM_NET_CTRL_RX_EN			(1 << 2)
 #define   CGEM_NET_CTRL_LOOP_LOCAL		(1 << 1)
 
-#define CGEM_NET_CFG			0x004	/* Netowrk Configuration */
+#define CGEM_NET_CFG			0x004	/* Network Configuration */
 #define   CGEM_NET_CFG_UNIDIR_EN		(1U << 31)
 #define   CGEM_NET_CFG_IGNORE_IPG_RX_ER		(1 << 30)
 #define   CGEM_NET_CFG_RX_BAD_PREAMBLE		(1 << 29)