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path: root/drivers/net/dsa/microchip/ksz8795.c
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Diffstat (limited to 'drivers/net/dsa/microchip/ksz8795.c')
-rw-r--r--drivers/net/dsa/microchip/ksz8795.c111
1 files changed, 87 insertions, 24 deletions
diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index c79a5128235f..bd3b133e7085 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -552,7 +552,7 @@ static void ksz8_w_vlan_table(struct ksz_device *dev, u16 vid, u16 vlan)
ksz8_w_table(dev, TABLE_VLAN, addr, buf);
}
-void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
+int ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
{
u8 restart, speed, ctrl, link;
int processed = true;
@@ -560,14 +560,24 @@ void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
u8 val1, val2;
u16 data = 0;
u8 p = phy;
+ int ret;
regs = dev->info->regs;
switch (reg) {
case MII_BMCR:
- ksz_pread8(dev, p, regs[P_NEG_RESTART_CTRL], &restart);
- ksz_pread8(dev, p, regs[P_SPEED_STATUS], &speed);
- ksz_pread8(dev, p, regs[P_FORCE_CTRL], &ctrl);
+ ret = ksz_pread8(dev, p, regs[P_NEG_RESTART_CTRL], &restart);
+ if (ret)
+ return ret;
+
+ ret = ksz_pread8(dev, p, regs[P_SPEED_STATUS], &speed);
+ if (ret)
+ return ret;
+
+ ret = ksz_pread8(dev, p, regs[P_FORCE_CTRL], &ctrl);
+ if (ret)
+ return ret;
+
if (restart & PORT_PHY_LOOPBACK)
data |= BMCR_LOOPBACK;
if (ctrl & PORT_FORCE_100_MBIT)
@@ -597,7 +607,10 @@ void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
data |= KSZ886X_BMCR_DISABLE_LED;
break;
case MII_BMSR:
- ksz_pread8(dev, p, regs[P_LINK_STATUS], &link);
+ ret = ksz_pread8(dev, p, regs[P_LINK_STATUS], &link);
+ if (ret)
+ return ret;
+
data = BMSR_100FULL |
BMSR_100HALF |
BMSR_10FULL |
@@ -618,7 +631,10 @@ void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
data = KSZ8795_ID_LO;
break;
case MII_ADVERTISE:
- ksz_pread8(dev, p, regs[P_LOCAL_CTRL], &ctrl);
+ ret = ksz_pread8(dev, p, regs[P_LOCAL_CTRL], &ctrl);
+ if (ret)
+ return ret;
+
data = ADVERTISE_CSMA;
if (ctrl & PORT_AUTO_NEG_SYM_PAUSE)
data |= ADVERTISE_PAUSE_CAP;
@@ -632,7 +648,10 @@ void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
data |= ADVERTISE_10HALF;
break;
case MII_LPA:
- ksz_pread8(dev, p, regs[P_REMOTE_STATUS], &link);
+ ret = ksz_pread8(dev, p, regs[P_REMOTE_STATUS], &link);
+ if (ret)
+ return ret;
+
data = LPA_SLCT;
if (link & PORT_REMOTE_SYM_PAUSE)
data |= LPA_PAUSE_CAP;
@@ -648,8 +667,14 @@ void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
data |= LPA_LPACK;
break;
case PHY_REG_LINK_MD:
- ksz_pread8(dev, p, REG_PORT_LINK_MD_CTRL, &val1);
- ksz_pread8(dev, p, REG_PORT_LINK_MD_RESULT, &val2);
+ ret = ksz_pread8(dev, p, REG_PORT_LINK_MD_CTRL, &val1);
+ if (ret)
+ return ret;
+
+ ret = ksz_pread8(dev, p, REG_PORT_LINK_MD_RESULT, &val2);
+ if (ret)
+ return ret;
+
if (val1 & PORT_START_CABLE_DIAG)
data |= PHY_START_CABLE_DIAG;
@@ -664,7 +689,10 @@ void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
FIELD_GET(PORT_CABLE_FAULT_COUNTER_L, val2));
break;
case PHY_REG_PHY_CTRL:
- ksz_pread8(dev, p, regs[P_LINK_STATUS], &link);
+ ret = ksz_pread8(dev, p, regs[P_LINK_STATUS], &link);
+ if (ret)
+ return ret;
+
if (link & PORT_MDIX_STATUS)
data |= KSZ886X_CTRL_MDIX_STAT;
break;
@@ -674,13 +702,16 @@ void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
}
if (processed)
*val = data;
+
+ return 0;
}
-void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
+int ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
{
u8 restart, speed, ctrl, data;
const u16 *regs;
u8 p = phy;
+ int ret;
regs = dev->info->regs;
@@ -690,15 +721,26 @@ void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
/* Do not support PHY reset function. */
if (val & BMCR_RESET)
break;
- ksz_pread8(dev, p, regs[P_SPEED_STATUS], &speed);
+ ret = ksz_pread8(dev, p, regs[P_SPEED_STATUS], &speed);
+ if (ret)
+ return ret;
+
data = speed;
if (val & KSZ886X_BMCR_HP_MDIX)
data |= PORT_HP_MDIX;
else
data &= ~PORT_HP_MDIX;
- if (data != speed)
- ksz_pwrite8(dev, p, regs[P_SPEED_STATUS], data);
- ksz_pread8(dev, p, regs[P_FORCE_CTRL], &ctrl);
+
+ if (data != speed) {
+ ret = ksz_pwrite8(dev, p, regs[P_SPEED_STATUS], data);
+ if (ret)
+ return ret;
+ }
+
+ ret = ksz_pread8(dev, p, regs[P_FORCE_CTRL], &ctrl);
+ if (ret)
+ return ret;
+
data = ctrl;
if (ksz_is_ksz88x3(dev)) {
if ((val & BMCR_ANENABLE))
@@ -724,9 +766,17 @@ void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
data |= PORT_FORCE_FULL_DUPLEX;
else
data &= ~PORT_FORCE_FULL_DUPLEX;
- if (data != ctrl)
- ksz_pwrite8(dev, p, regs[P_FORCE_CTRL], data);
- ksz_pread8(dev, p, regs[P_NEG_RESTART_CTRL], &restart);
+
+ if (data != ctrl) {
+ ret = ksz_pwrite8(dev, p, regs[P_FORCE_CTRL], data);
+ if (ret)
+ return ret;
+ }
+
+ ret = ksz_pread8(dev, p, regs[P_NEG_RESTART_CTRL], &restart);
+ if (ret)
+ return ret;
+
data = restart;
if (val & KSZ886X_BMCR_DISABLE_LED)
data |= PORT_LED_OFF;
@@ -756,11 +806,19 @@ void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
data |= PORT_PHY_LOOPBACK;
else
data &= ~PORT_PHY_LOOPBACK;
- if (data != restart)
- ksz_pwrite8(dev, p, regs[P_NEG_RESTART_CTRL], data);
+
+ if (data != restart) {
+ ret = ksz_pwrite8(dev, p, regs[P_NEG_RESTART_CTRL],
+ data);
+ if (ret)
+ return ret;
+ }
break;
case MII_ADVERTISE:
- ksz_pread8(dev, p, regs[P_LOCAL_CTRL], &ctrl);
+ ret = ksz_pread8(dev, p, regs[P_LOCAL_CTRL], &ctrl);
+ if (ret)
+ return ret;
+
data = ctrl;
data &= ~(PORT_AUTO_NEG_SYM_PAUSE |
PORT_AUTO_NEG_100BTX_FD |
@@ -777,8 +835,12 @@ void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
data |= PORT_AUTO_NEG_10BT_FD;
if (val & ADVERTISE_10HALF)
data |= PORT_AUTO_NEG_10BT;
- if (data != ctrl)
- ksz_pwrite8(dev, p, regs[P_LOCAL_CTRL], data);
+
+ if (data != ctrl) {
+ ret = ksz_pwrite8(dev, p, regs[P_LOCAL_CTRL], data);
+ if (ret)
+ return ret;
+ }
break;
case PHY_REG_LINK_MD:
if (val & PHY_START_CABLE_DIAG)
@@ -787,6 +849,8 @@ void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
default:
break;
}
+
+ return 0;
}
void ksz8_cfg_port_member(struct ksz_device *dev, int port, u8 member)
@@ -1187,7 +1251,6 @@ void ksz8_config_cpu_port(struct dsa_switch *ds)
if (i == dev->phy_port_cnt)
break;
p->on = 1;
- p->phy = 1;
}
for (i = 0; i < dev->phy_port_cnt; i++) {
p = &dev->ports[i];
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-30 13:44:55 +0300