ar71xx: ag71xx: add support for getting switch port link status

SVN-Revision: 29017

diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ar7240.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ar7240.c
index 8e1584999b9726889405e3a7c79d4316514d60eb..22240902b57f97788e9da13b2940b0de652cf266 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ar7240.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ar7240.c
@@ -96,6 +96,7 @@
 #define AR7240_REG_PORT_BASE(_port)    (0x100 + (_port) * 0x100)
 
 #define AR7240_REG_PORT_STATUS(_port)  (AR7240_REG_PORT_BASE((_port)) + 0x00)
+#define AR7240_PORT_STATUS_SPEED_S     0
 #define AR7240_PORT_STATUS_SPEED_M     BITM(2)
 #define AR7240_PORT_STATUS_SPEED_10    0
 #define AR7240_PORT_STATUS_SPEED_100   1
@@ -207,6 +208,7 @@ struct ar7240sw {
        u8 vlan_table[AR7240_MAX_VLANS];
        u8 vlan_tagged;
        u16 pvid[AR7240_NUM_PORTS];
+       char buf[80];
 };
 
 struct ar7240sw_hw_stat {
@@ -645,6 +647,63 @@ ar7240_get_vlan(struct switch_dev *dev, const struct switch_attr *attr,
        return 0;
 }
 
+static const char *
+ar7240_speed_str(u32 status)
+{
+       u32 speed;
+
+       speed = (status >> AR7240_PORT_STATUS_SPEED_S) &
+                                       AR7240_PORT_STATUS_SPEED_M;
+       switch (speed) {
+       case AR7240_PORT_STATUS_SPEED_10:
+               return "10baseT";
+       case AR7240_PORT_STATUS_SPEED_100:
+               return "100baseT";
+       case AR7240_PORT_STATUS_SPEED_1000:
+               return "1000baseT";
+       }
+
+       return "unknown";
+}
+
+static int
+ar7240_port_get_link(struct switch_dev *dev, const struct switch_attr *attr,
+                    struct switch_val *val)
+{
+       struct ar7240sw *as = sw_to_ar7240(dev);
+       struct mii_bus *mii = as->mii_bus;
+       u32 len;
+       u32 status;
+       int port;
+
+       port = val->port_vlan;
+
+       memset(as->buf, '\0', sizeof(as->buf));
+       status = ar7240sw_reg_read(mii, AR7240_REG_PORT_STATUS(port));
+
+       if (status & AR7240_PORT_STATUS_LINK_UP) {
+               len = snprintf(as->buf, sizeof(as->buf),
+                               "port:%d link:up speed:%s %s-duplex %s%s%s",
+                               port,
+                               ar7240_speed_str(status),
+                               (status & AR7240_PORT_STATUS_DUPLEX) ?
+                                       "full" : "half",
+                               (status & AR7240_PORT_STATUS_TXFLOW) ?
+                                       "txflow ": "",
+                               (status & AR7240_PORT_STATUS_RXFLOW) ?
+                                       "rxflow " : "",
+                               (status & AR7240_PORT_STATUS_LINK_AUTO) ?
+                                       "auto ": "");
+       } else {
+               len = snprintf(as->buf, sizeof(as->buf),
+                              "port:%d link:down", port);
+       }
+
+       val->value.s = as->buf;
+       val->len = len;
+
+       return 0;
+}
 
 static void
 ar7240_vtu_op(struct ar7240sw *as, u32 op, u32 val)
@@ -733,6 +792,14 @@ static struct switch_attr ar7240_globals[] = {
 };
 
 static struct switch_attr ar7240_port[] = {
+       {
+               .type = SWITCH_TYPE_STRING,
+               .name = "link",
+               .description = "Get port link information",
+               .max = 1,
+               .set = NULL,
+               .get = ar7240_port_get_link,
+       },
 };
 
 static struct switch_attr ar7240_vlan[] = {