linux/generic: add MIB counters and port status to ADM6996 switch

This patch adds port status information and MIB counters to the ADM6996
switch driver.

The driver supports also the older ADM6996L-variant, but I'm not able to
test this patch on that chip. According to the datasheet the same
registers exist there as well, so I think it should work, but any
feedback is appreciated.

Signed-off-by: Matti Laakso <malaakso at elisanet.fi>
SVN-Revision: 40542

diff --git a/target/linux/generic/files/drivers/net/phy/adm6996.c b/target/linux/generic/files/drivers/net/phy/adm6996.c
index ce48b528cc5b5e368660c7c6cbb080af2326c1b2..7e47f3dc1a714981d3e6ad796cfbadaf182f28ed 100644 (file)
--- a/target/linux/generic/files/drivers/net/phy/adm6996.c
+++ b/target/linux/generic/files/drivers/net/phy/adm6996.c
@@ -6,6 +6,7 @@
  * Copyright (c) 2008 Felix Fietkau <nbd@openwrt.org>
  * VLAN support Copyright (c) 2010, 2011 Peter Lebbing <peter@digitalbrains.com>
  * Copyright (c) 2013 Hauke Mehrtens <hauke@hauke-m.de>
+ * Copyright (c) 2014 Matti Laakso <malaakso@elisanet.fi>
  *
  * This program is free software; you can redistribute  it and/or modify it
  * under  the terms of the GNU General Public License v2 as published by the
@@ -54,6 +55,11 @@ static const char * const adm6996_model_name[] =
        "ADM6996L"
 };
 
+struct adm6996_mib_desc {
+       unsigned int offset;
+       const char *name;
+};
+
 struct adm6996_priv {
        struct switch_dev dev;
        void *priv;
@@ -78,6 +84,9 @@ struct adm6996_priv {
        u16 vlan_id[ADM_NUM_VLANS];
        u8 vlan_table[ADM_NUM_VLANS];   /* bitmap, 1 = port is member */
        u8 vlan_tagged[ADM_NUM_VLANS];  /* bitmap, 1 = tagged member */
+       
+       struct mutex mib_lock;
+       char buf[2048];
 
        struct mutex reg_mutex;
 
@@ -89,6 +98,21 @@ struct adm6996_priv {
 #define to_adm(_dev) container_of(_dev, struct adm6996_priv, dev)
 #define phy_to_adm(_phy) ((struct adm6996_priv *) (_phy)->priv)
 
+#define MIB_DESC(_o, _n)       \
+       {                       \
+               .offset = (_o), \
+               .name = (_n),   \
+       }
+
+static const struct adm6996_mib_desc adm6996_mibs[] = {
+       MIB_DESC(ADM_CL0, "RxPacket"),
+       MIB_DESC(ADM_CL6, "RxByte"),
+       MIB_DESC(ADM_CL12, "TxPacket"),
+       MIB_DESC(ADM_CL18, "TxByte"),
+       MIB_DESC(ADM_CL24, "Collision"),
+       MIB_DESC(ADM_CL30, "Error"),
+};
+
 static inline u16
 r16(struct adm6996_priv *priv, enum admreg reg)
 {
@@ -773,6 +797,99 @@ adm6996_reset_switch(struct switch_dev *dev)
        return 0;
 }
 
+static int
+adm6996_get_port_link(struct switch_dev *dev, int port,
+               struct switch_port_link *link)
+{
+       struct adm6996_priv *priv = to_adm(dev);
+       
+       u16 reg = 0;
+       u32 speed;
+       
+       if (port >= ADM_NUM_PORTS)
+               return -EINVAL;
+       
+       switch (port) {
+       case 0:
+               reg = r16(priv, ADM_PS0);
+               break;
+       case 1:
+               reg = r16(priv, ADM_PS0);
+               reg = reg >> 8;
+               break;
+       case 2:
+               reg = r16(priv, ADM_PS1);
+               break;
+       case 3:
+               reg = r16(priv, ADM_PS1);
+               reg = reg >> 8;
+               break;
+       case 4:
+               reg = r16(priv, ADM_PS1);
+               reg = reg >> 12;
+               break;
+       case 5:
+               reg = r16(priv, ADM_PS2);
+               /* Bits 0, 1, 3 and 4. */
+               reg = (reg & 3) | ((reg & 24) >> 1);
+               break;
+       default:
+               return -EINVAL;
+       }
+       
+       link->link = reg & ADM_PS_LS;
+       if (!link->link)
+               return 0;
+       link->aneg = true;
+       link->duplex = reg & ADM_PS_DS;
+       link->tx_flow = reg & ADM_PS_FCS;
+       link->rx_flow = reg & ADM_PS_FCS;
+       if (reg & ADM_PS_SS)
+               link->speed = SWITCH_PORT_SPEED_100;
+       else
+               link->speed = SWITCH_PORT_SPEED_10;
+
+       return 0;
+}
+
+static int
+adm6996_sw_get_port_mib(struct switch_dev *dev,
+                      const struct switch_attr *attr,
+                      struct switch_val *val)
+{
+       struct adm6996_priv *priv = to_adm(dev);
+       int port;
+       char *buf = priv->buf;
+       int i, len = 0;
+       u32 reg = 0;
+
+       port = val->port_vlan;
+       if (port >= ADM_NUM_PORTS)
+               return -EINVAL;
+
+       mutex_lock(&priv->mib_lock);
+
+       len += snprintf(buf + len, sizeof(priv->buf) - len,
+                       "Port %d MIB counters\n",
+                       port);
+
+       for (i = 0; i < ARRAY_SIZE(adm6996_mibs); i++) {
+               reg = r16(priv, adm6996_mibs[i].offset + ADM_OFFSET_PORT(port));
+               reg += r16(priv, adm6996_mibs[i].offset + ADM_OFFSET_PORT(port) + 1) << 16;
+               len += snprintf(buf + len, sizeof(priv->buf) - len,
+                               "%-12s: %lu\n",
+                               adm6996_mibs[i].name,
+                               reg);
+       }
+
+       mutex_unlock(&priv->mib_lock);
+
+       val->value.s = buf;
+       val->len = len;
+
+       return 0;
+}
+
 static struct switch_attr adm6996_globals[] = {
        {
         .type = SWITCH_TYPE_INT,
@@ -802,6 +919,13 @@ static struct switch_attr adm6996_globals[] = {
 };
 
 static struct switch_attr adm6996_port[] = {
+       {
+        .type = SWITCH_TYPE_STRING,
+        .name = "mib",
+        .description = "Get port's MIB counters",
+        .set = NULL,
+        .get = adm6996_sw_get_port_mib,
+       },
 };
 
 static struct switch_attr adm6996_vlan[] = {
@@ -833,6 +957,7 @@ static const struct switch_dev_ops adm6996_ops = {
        .set_vlan_ports = adm6996_set_ports,
        .apply_config = adm6996_hw_apply,
        .reset_switch = adm6996_reset_switch,
+       .get_port_link = adm6996_get_port_link,
 };
 
 static int adm6996_switch_init(struct adm6996_priv *priv, const char *alias, struct net_device *netdev)
@@ -899,6 +1024,7 @@ static int adm6996_config_init(struct phy_device *pdev)
                return -ENOMEM;
 
        mutex_init(&priv->reg_mutex);
+       mutex_init(&priv->mib_lock);
        priv->priv = pdev;
        priv->read = adm6996_read_mii_reg;
        priv->write = adm6996_write_mii_reg;

diff --git a/target/linux/generic/files/drivers/net/phy/adm6996.h b/target/linux/generic/files/drivers/net/phy/adm6996.h
index b30eceafddf9c8cb598df4b81abdee588ce49b0e..66c77a096884a8f19d04e66d79259bb1bf2a2251 100644 (file)
--- a/target/linux/generic/files/drivers/net/phy/adm6996.h
+++ b/target/linux/generic/files/drivers/net/phy/adm6996.h
@@ -50,6 +50,16 @@ enum admreg {
        ADM_COUNTER_BASE        = 0xa0,
                ADM_SIG0                = ADM_COUNTER_BASE + 0,
                ADM_SIG1                = ADM_COUNTER_BASE + 1,
+               ADM_PS0         = ADM_COUNTER_BASE + 2,
+               ADM_PS1         = ADM_COUNTER_BASE + 3,
+               ADM_PS2         = ADM_COUNTER_BASE + 4,
+               ADM_CL0         = ADM_COUNTER_BASE + 8, /* RxPacket */
+               ADM_CL6         = ADM_COUNTER_BASE + 0x1a, /* RxByte */
+               ADM_CL12                = ADM_COUNTER_BASE + 0x2c, /* TxPacket */
+               ADM_CL18                = ADM_COUNTER_BASE + 0x3e, /* TxByte */
+               ADM_CL24                = ADM_COUNTER_BASE + 0x50, /* Coll */
+               ADM_CL30                = ADM_COUNTER_BASE + 0x62, /* Err */
+#define ADM_OFFSET_PORT(n) ((n * 4) - (n / 4) * 2 - (n / 5) * 2)
        ADM_PHY_BASE            = 0x200,
 #define ADM_PHY_PORT(n) (ADM_PHY_BASE + (0x20 * n))
 };
@@ -159,6 +169,14 @@ static const u8 adm_portcfg[] = {
                        ((ports & 0x04) << 2) | ((ports & 0x08) << 3) | \
                        ((ports & 0x10) << 3) | ((ports & 0x20) << 3))
 
+/* Port status register */
+enum {
+       ADM_PS_LS = (1 << 0),   /* Link status */
+       ADM_PS_SS = (1 << 1),   /* Speed status */
+       ADM_PS_DS = (1 << 2),   /* Duplex status */
+       ADM_PS_FCS = (1 << 3)   /* Flow control status */
+};
+
 /*
  * Split the register address in phy id and register
  * it will get combined again by the mdio bus op