[rtems commit] leon, greth: speed modes advertising now configurable

[Daniel Hellstrom]

Module:    rtems
Branch:    master
Commit:    e6fbd26fdb2fe09106b4c062ddf312a28d29c1a0
Changeset: http://git.rtems.org/rtems/commit/?id=e6fbd26fdb2fe09106b4c062ddf312a28d29c1a0

Author:    Daniel Hellstrom <daniel at gaisler.com>
Date:      Mon Apr 24 16:32:17 2017 +0200

leon, greth: speed modes advertising now configurable

---

 c/src/lib/libbsp/sparc/shared/include/greth.h | 10 ++++++++
 c/src/lib/libbsp/sparc/shared/net/greth.c     | 36 ++++++++++++++++++++++++---
 2 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/c/src/lib/libbsp/sparc/shared/include/greth.h b/c/src/lib/libbsp/sparc/shared/include/greth.h
index 648f51f..9209d82 100644
--- a/c/src/lib/libbsp/sparc/shared/include/greth.h
+++ b/c/src/lib/libbsp/sparc/shared/include/greth.h
@@ -81,6 +81,8 @@ typedef struct _greth_regs {
 #define GRETH_CTRL_FULLD        0x00000010 /* Full Duplex */
 #define GRETH_CTRL_PRO          0x00000020 /* Promiscuous (receive all) */
 #define GRETH_CTRL_RST          0x00000040 /* Reset MAC */
+#define GRETH_CTRL_SP           0x00000080 /* 100MBit speed mode */
+#define GRETH_CTRL_GB           0x00000100 /* 1GBit speed mode */
 #define GRETH_CTRL_DD           0x00001000 /* Disable EDCL Duplex Detection */
 #define GRETH_CTRL_ED           0x00004000 /* EDCL Disable */
 
@@ -133,6 +135,14 @@ struct phy_device_info
    int extpart;
 };
 
+/* Limit speed modes advertised during auto-negotiation */
+#define GRETH_ADV_10_HD    0x0001
+#define GRETH_ADV_10_FD    0x0002
+#define GRETH_ADV_100_HD   0x0004
+#define GRETH_ADV_100_FD   0x0008
+#define GRETH_ADV_1000_HD  0x0010
+#define GRETH_ADV_1000_FD  0x0020
+#define GRETH_ADV_ALL      0x003f
 /*
 #ifdef CPU_U32_FIX
 void ipalign(struct mbuf *m);
diff --git a/c/src/lib/libbsp/sparc/shared/net/greth.c b/c/src/lib/libbsp/sparc/shared/net/greth.c
index 87162a2..9f41a51 100644
--- a/c/src/lib/libbsp/sparc/shared/net/greth.c
+++ b/c/src/lib/libbsp/sparc/shared/net/greth.c
@@ -188,6 +188,7 @@ struct greth_softc
    int gb;
    int gbit_mac;
    int auto_neg;
+   unsigned int advmodes; /* advertise ethernet speed modes. 0 = all modes. */
    struct timespec auto_neg_time;
 
    /*
@@ -352,6 +353,7 @@ greth_initialize_hardware (struct greth_softc *sc)
     int tmp2;
     struct timespec tstart, tnow;
     greth_regs *regs;
+    unsigned int advmodes;
 
     regs = sc->regs;
 
@@ -394,6 +396,13 @@ greth_initialize_hardware (struct greth_softc *sc)
     /* Wait for reset to complete and get default values */
     while ((phyctrl = read_mii(sc, phyaddr, 0)) & 0x8000) {}
 
+    /* Set up PHY advertising modes for auto-negotiation */
+    advmodes = sc->advmodes;
+    if (advmodes == 0)
+        advmodes = GRETH_ADV_ALL;
+    if (!sc->gbit_mac)
+        advmodes &= ~(GRETH_ADV_1000_FD | GRETH_ADV_1000_HD);
+
     /* Enable/Disable GBit auto-neg advetisement so that the link partner
      * know that we have/haven't GBit capability. The MAC may not support
      * Gbit even though PHY does...
@@ -401,12 +410,27 @@ greth_initialize_hardware (struct greth_softc *sc)
     phystatus = read_mii(sc, phyaddr, 1);
     if (phystatus & 0x0100) {
         tmp1 = read_mii(sc, phyaddr, 9);
-        if (sc->gbit_mac)
-            write_mii(sc, phyaddr, 9, tmp1 | 0x300);
-        else
-            write_mii(sc, phyaddr, 9, tmp1 & ~(0x300));
+        tmp1 &= ~0x300;
+        if (advmodes & GRETH_ADV_1000_FD)
+            tmp1 |= 0x200;
+        if (advmodes & GRETH_ADV_1000_HD)
+            tmp1 |= 0x100;
+        write_mii(sc, phyaddr, 9, tmp1);
     }
 
+    /* Optionally limit the 10/100 modes as configured by user */
+    tmp1 = read_mii(sc, phyaddr, 4);
+    tmp1 &= ~0x1e0;
+    if (advmodes & GRETH_ADV_100_FD)
+        tmp1 |= 0x100;
+    if (advmodes & GRETH_ADV_100_HD)
+        tmp1 |= 0x080;
+    if (advmodes & GRETH_ADV_10_FD)
+        tmp1 |= 0x040;
+    if (advmodes & GRETH_ADV_10_HD)
+        tmp1 |= 0x020;
+    write_mii(sc, phyaddr, 4, tmp1);
+
     /* If autonegotiation implemented we start it */
     if (phystatus & 0x0008) {
         write_mii(sc, phyaddr, 0, phyctrl | 0x1200);
@@ -1480,6 +1504,10 @@ int greth_device_init(struct greth_softc *sc)
     if ( value && (value->i < 32) )
         sc->phyaddr = value->i;
 
+    value = drvmgr_dev_key_get(sc->dev, "advModes", DRVMGR_KT_INT);
+    if ( value )
+        sc->advmodes = value->i;
+
     return 0;
 }