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path: root/drivers/net/dsa/microchip/ksz_common.c
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Diffstat (limited to 'drivers/net/dsa/microchip/ksz_common.c')
-rw-r--r--drivers/net/dsa/microchip/ksz_common.c645
1 files changed, 634 insertions, 11 deletions
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 286e20f340..ff4b39601c 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -16,6 +16,7 @@
#include <linux/etherdevice.h>
#include <linux/if_bridge.h>
#include <linux/if_vlan.h>
+#include <linux/if_hsr.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/of.h>
@@ -186,6 +187,72 @@ static const struct ksz_mib_names ksz9477_mib_names[] = {
{ 0x83, "tx_discards" },
};
+struct ksz_driver_strength_prop {
+ const char *name;
+ int offset;
+ int value;
+};
+
+enum ksz_driver_strength_type {
+ KSZ_DRIVER_STRENGTH_HI,
+ KSZ_DRIVER_STRENGTH_LO,
+ KSZ_DRIVER_STRENGTH_IO,
+};
+
+/**
+ * struct ksz_drive_strength - drive strength mapping
+ * @reg_val: register value
+ * @microamp: microamp value
+ */
+struct ksz_drive_strength {
+ u32 reg_val;
+ u32 microamp;
+};
+
+/* ksz9477_drive_strengths - Drive strength mapping for KSZ9477 variants
+ *
+ * This values are not documented in KSZ9477 variants but confirmed by
+ * Microchip that KSZ9477, KSZ9567, KSZ8567, KSZ9897, KSZ9896, KSZ9563, KSZ9893
+ * and KSZ8563 are using same register (drive strength) settings like KSZ8795.
+ *
+ * Documentation in KSZ8795CLX provides more information with some
+ * recommendations:
+ * - for high speed signals
+ * 1. 4 mA or 8 mA is often used for MII, RMII, and SPI interface with using
+ * 2.5V or 3.3V VDDIO.
+ * 2. 12 mA or 16 mA is often used for MII, RMII, and SPI interface with
+ * using 1.8V VDDIO.
+ * 3. 20 mA or 24 mA is often used for GMII/RGMII interface with using 2.5V
+ * or 3.3V VDDIO.
+ * 4. 28 mA is often used for GMII/RGMII interface with using 1.8V VDDIO.
+ * 5. In same interface, the heavy loading should use higher one of the
+ * drive current strength.
+ * - for low speed signals
+ * 1. 3.3V VDDIO, use either 4 mA or 8 mA.
+ * 2. 2.5V VDDIO, use either 8 mA or 12 mA.
+ * 3. 1.8V VDDIO, use either 12 mA or 16 mA.
+ * 4. If it is heavy loading, can use higher drive current strength.
+ */
+static const struct ksz_drive_strength ksz9477_drive_strengths[] = {
+ { SW_DRIVE_STRENGTH_2MA, 2000 },
+ { SW_DRIVE_STRENGTH_4MA, 4000 },
+ { SW_DRIVE_STRENGTH_8MA, 8000 },
+ { SW_DRIVE_STRENGTH_12MA, 12000 },
+ { SW_DRIVE_STRENGTH_16MA, 16000 },
+ { SW_DRIVE_STRENGTH_20MA, 20000 },
+ { SW_DRIVE_STRENGTH_24MA, 24000 },
+ { SW_DRIVE_STRENGTH_28MA, 28000 },
+};
+
+/* ksz8830_drive_strengths - Drive strength mapping for KSZ8830, KSZ8873, ..
+ * variants.
+ * This values are documented in KSZ8873 and KSZ8863 datasheets.
+ */
+static const struct ksz_drive_strength ksz8830_drive_strengths[] = {
+ { 0, 8000 },
+ { KSZ8873_DRIVE_STRENGTH_16MA, 16000 },
+};
+
static const struct ksz_dev_ops ksz8_dev_ops = {
.setup = ksz8_setup,
.get_port_addr = ksz8_get_port_addr,
@@ -252,6 +319,9 @@ static const struct ksz_dev_ops ksz9477_dev_ops = {
.mdb_del = ksz9477_mdb_del,
.change_mtu = ksz9477_change_mtu,
.phylink_mac_link_up = ksz9477_phylink_mac_link_up,
+ .get_wol = ksz9477_get_wol,
+ .set_wol = ksz9477_set_wol,
+ .wol_pre_shutdown = ksz9477_wol_pre_shutdown,
.config_cpu_port = ksz9477_config_cpu_port,
.tc_cbs_set_cinc = ksz9477_tc_cbs_set_cinc,
.enable_stp_addr = ksz9477_enable_stp_addr,
@@ -298,6 +368,7 @@ static const struct ksz_dev_ops lan937x_dev_ops = {
};
static const u16 ksz8795_regs[] = {
+ [REG_SW_MAC_ADDR] = 0x68,
[REG_IND_CTRL_0] = 0x6E,
[REG_IND_DATA_8] = 0x70,
[REG_IND_DATA_CHECK] = 0x72,
@@ -373,6 +444,7 @@ static const u8 ksz8795_shifts[] = {
};
static const u16 ksz8863_regs[] = {
+ [REG_SW_MAC_ADDR] = 0x70,
[REG_IND_CTRL_0] = 0x79,
[REG_IND_DATA_8] = 0x7B,
[REG_IND_DATA_CHECK] = 0x7B,
@@ -426,6 +498,7 @@ static u8 ksz8863_shifts[] = {
};
static const u16 ksz9477_regs[] = {
+ [REG_SW_MAC_ADDR] = 0x0302,
[P_STP_CTRL] = 0x0B04,
[S_START_CTRL] = 0x0300,
[S_BROADCAST_CTRL] = 0x0332,
@@ -1876,14 +1949,14 @@ static int ksz_irq_phy_setup(struct ksz_device *dev)
ret = irq;
goto out;
}
- ds->slave_mii_bus->irq[phy] = irq;
+ ds->user_mii_bus->irq[phy] = irq;
}
}
return 0;
out:
while (phy--)
if (BIT(phy) & ds->phys_mii_mask)
- irq_dispose_mapping(ds->slave_mii_bus->irq[phy]);
+ irq_dispose_mapping(ds->user_mii_bus->irq[phy]);
return ret;
}
@@ -1895,7 +1968,7 @@ static void ksz_irq_phy_free(struct ksz_device *dev)
for (phy = 0; phy < KSZ_MAX_NUM_PORTS; phy++)
if (BIT(phy) & ds->phys_mii_mask)
- irq_dispose_mapping(ds->slave_mii_bus->irq[phy]);
+ irq_dispose_mapping(ds->user_mii_bus->irq[phy]);
}
static int ksz_mdio_register(struct ksz_device *dev)
@@ -1918,12 +1991,12 @@ static int ksz_mdio_register(struct ksz_device *dev)
bus->priv = dev;
bus->read = ksz_sw_mdio_read;
bus->write = ksz_sw_mdio_write;
- bus->name = "ksz slave smi";
+ bus->name = "ksz user smi";
snprintf(bus->id, MII_BUS_ID_SIZE, "SMI-%d", ds->index);
bus->parent = ds->dev;
bus->phy_mask = ~ds->phys_mii_mask;
- ds->slave_mii_bus = bus;
+ ds->user_mii_bus = bus;
if (dev->irq > 0) {
ret = ksz_irq_phy_setup(dev);
@@ -2275,7 +2348,7 @@ static void ksz_mib_read_work(struct work_struct *work)
if (!p->read) {
const struct dsa_port *dp = dsa_to_port(dev->ds, i);
- if (!netif_carrier_ok(dp->slave))
+ if (!netif_carrier_ok(dp->user))
mib->cnt_ptr = dev->info->reg_mib_cnt;
}
port_r_cnt(dev, i);
@@ -2395,7 +2468,7 @@ static void ksz_get_ethtool_stats(struct dsa_switch *ds, int port,
mutex_lock(&mib->cnt_mutex);
/* Only read dropped counters if no link. */
- if (!netif_carrier_ok(dp->slave))
+ if (!netif_carrier_ok(dp->user))
mib->cnt_ptr = dev->info->reg_mib_cnt;
port_r_cnt(dev, port);
memcpy(buf, mib->counters, dev->info->mib_cnt * sizeof(u64));
@@ -2498,15 +2571,14 @@ static int ksz_port_mdb_del(struct dsa_switch *ds, int port,
return dev->dev_ops->mdb_del(dev, port, mdb, db);
}
-static int ksz_enable_port(struct dsa_switch *ds, int port,
- struct phy_device *phy)
+static int ksz_port_setup(struct dsa_switch *ds, int port)
{
struct ksz_device *dev = ds->priv;
if (!dsa_is_user_port(ds, port))
return 0;
- /* setup slave port */
+ /* setup user port */
dev->dev_ops->port_setup(dev, port, false);
/* port_stp_state_set() will be called after to enable the port so
@@ -2562,6 +2634,23 @@ void ksz_port_stp_state_set(struct dsa_switch *ds, int port, u8 state)
ksz_update_port_member(dev, port);
}
+static void ksz_port_teardown(struct dsa_switch *ds, int port)
+{
+ struct ksz_device *dev = ds->priv;
+
+ switch (dev->chip_id) {
+ case KSZ8563_CHIP_ID:
+ case KSZ9477_CHIP_ID:
+ case KSZ9563_CHIP_ID:
+ case KSZ9567_CHIP_ID:
+ case KSZ9893_CHIP_ID:
+ case KSZ9896_CHIP_ID:
+ case KSZ9897_CHIP_ID:
+ if (dsa_is_user_port(ds, port))
+ ksz9477_port_acl_free(dev, port);
+ }
+}
+
static int ksz_port_pre_bridge_flags(struct dsa_switch *ds, int port,
struct switchdev_brport_flags flags,
struct netlink_ext_ack *extack)
@@ -3115,6 +3204,44 @@ static int ksz_switch_detect(struct ksz_device *dev)
return 0;
}
+static int ksz_cls_flower_add(struct dsa_switch *ds, int port,
+ struct flow_cls_offload *cls, bool ingress)
+{
+ struct ksz_device *dev = ds->priv;
+
+ switch (dev->chip_id) {
+ case KSZ8563_CHIP_ID:
+ case KSZ9477_CHIP_ID:
+ case KSZ9563_CHIP_ID:
+ case KSZ9567_CHIP_ID:
+ case KSZ9893_CHIP_ID:
+ case KSZ9896_CHIP_ID:
+ case KSZ9897_CHIP_ID:
+ return ksz9477_cls_flower_add(ds, port, cls, ingress);
+ }
+
+ return -EOPNOTSUPP;
+}
+
+static int ksz_cls_flower_del(struct dsa_switch *ds, int port,
+ struct flow_cls_offload *cls, bool ingress)
+{
+ struct ksz_device *dev = ds->priv;
+
+ switch (dev->chip_id) {
+ case KSZ8563_CHIP_ID:
+ case KSZ9477_CHIP_ID:
+ case KSZ9563_CHIP_ID:
+ case KSZ9567_CHIP_ID:
+ case KSZ9893_CHIP_ID:
+ case KSZ9896_CHIP_ID:
+ case KSZ9897_CHIP_ID:
+ return ksz9477_cls_flower_del(ds, port, cls, ingress);
+ }
+
+ return -EOPNOTSUPP;
+}
+
/* Bandwidth is calculated by idle slope/transmission speed. Then the Bandwidth
* is converted to Hex-decimal using the successive multiplication method. On
* every step, integer part is taken and decimal part is carry forwarded.
@@ -3427,6 +3554,224 @@ static int ksz_setup_tc(struct dsa_switch *ds, int port,
}
}
+static void ksz_get_wol(struct dsa_switch *ds, int port,
+ struct ethtool_wolinfo *wol)
+{
+ struct ksz_device *dev = ds->priv;
+
+ if (dev->dev_ops->get_wol)
+ dev->dev_ops->get_wol(dev, port, wol);
+}
+
+static int ksz_set_wol(struct dsa_switch *ds, int port,
+ struct ethtool_wolinfo *wol)
+{
+ struct ksz_device *dev = ds->priv;
+
+ if (dev->dev_ops->set_wol)
+ return dev->dev_ops->set_wol(dev, port, wol);
+
+ return -EOPNOTSUPP;
+}
+
+static int ksz_port_set_mac_address(struct dsa_switch *ds, int port,
+ const unsigned char *addr)
+{
+ struct dsa_port *dp = dsa_to_port(ds, port);
+ struct ethtool_wolinfo wol;
+
+ if (dp->hsr_dev) {
+ dev_err(ds->dev,
+ "Cannot change MAC address on port %d with active HSR offload\n",
+ port);
+ return -EBUSY;
+ }
+
+ ksz_get_wol(ds, dp->index, &wol);
+ if (wol.wolopts & WAKE_MAGIC) {
+ dev_err(ds->dev,
+ "Cannot change MAC address on port %d with active Wake on Magic Packet\n",
+ port);
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+/**
+ * ksz_is_port_mac_global_usable - Check if the MAC address on a given port
+ * can be used as a global address.
+ * @ds: Pointer to the DSA switch structure.
+ * @port: The port number on which the MAC address is to be checked.
+ *
+ * This function examines the MAC address set on the specified port and
+ * determines if it can be used as a global address for the switch.
+ *
+ * Return: true if the port's MAC address can be used as a global address, false
+ * otherwise.
+ */
+bool ksz_is_port_mac_global_usable(struct dsa_switch *ds, int port)
+{
+ struct net_device *user = dsa_to_port(ds, port)->user;
+ const unsigned char *addr = user->dev_addr;
+ struct ksz_switch_macaddr *switch_macaddr;
+ struct ksz_device *dev = ds->priv;
+
+ ASSERT_RTNL();
+
+ switch_macaddr = dev->switch_macaddr;
+ if (switch_macaddr && !ether_addr_equal(switch_macaddr->addr, addr))
+ return false;
+
+ return true;
+}
+
+/**
+ * ksz_switch_macaddr_get - Program the switch's MAC address register.
+ * @ds: DSA switch instance.
+ * @port: Port number.
+ * @extack: Netlink extended acknowledgment.
+ *
+ * This function programs the switch's MAC address register with the MAC address
+ * of the requesting user port. This single address is used by the switch for
+ * multiple features like HSR self-address filtering and WoL. Other user ports
+ * can share ownership of this address as long as their MAC address is the same.
+ * The MAC addresses of user ports must not change while they have ownership of
+ * the switch MAC address.
+ *
+ * Return: 0 on success, or other error codes on failure.
+ */
+int ksz_switch_macaddr_get(struct dsa_switch *ds, int port,
+ struct netlink_ext_ack *extack)
+{
+ struct net_device *user = dsa_to_port(ds, port)->user;
+ const unsigned char *addr = user->dev_addr;
+ struct ksz_switch_macaddr *switch_macaddr;
+ struct ksz_device *dev = ds->priv;
+ const u16 *regs = dev->info->regs;
+ int i, ret;
+
+ /* Make sure concurrent MAC address changes are blocked */
+ ASSERT_RTNL();
+
+ switch_macaddr = dev->switch_macaddr;
+ if (switch_macaddr) {
+ if (!ether_addr_equal(switch_macaddr->addr, addr)) {
+ NL_SET_ERR_MSG_FMT_MOD(extack,
+ "Switch already configured for MAC address %pM",
+ switch_macaddr->addr);
+ return -EBUSY;
+ }
+
+ refcount_inc(&switch_macaddr->refcount);
+ return 0;
+ }
+
+ switch_macaddr = kzalloc(sizeof(*switch_macaddr), GFP_KERNEL);
+ if (!switch_macaddr)
+ return -ENOMEM;
+
+ ether_addr_copy(switch_macaddr->addr, addr);
+ refcount_set(&switch_macaddr->refcount, 1);
+ dev->switch_macaddr = switch_macaddr;
+
+ /* Program the switch MAC address to hardware */
+ for (i = 0; i < ETH_ALEN; i++) {
+ ret = ksz_write8(dev, regs[REG_SW_MAC_ADDR] + i, addr[i]);
+ if (ret)
+ goto macaddr_drop;
+ }
+
+ return 0;
+
+macaddr_drop:
+ dev->switch_macaddr = NULL;
+ refcount_set(&switch_macaddr->refcount, 0);
+ kfree(switch_macaddr);
+
+ return ret;
+}
+
+void ksz_switch_macaddr_put(struct dsa_switch *ds)
+{
+ struct ksz_switch_macaddr *switch_macaddr;
+ struct ksz_device *dev = ds->priv;
+ const u16 *regs = dev->info->regs;
+ int i;
+
+ /* Make sure concurrent MAC address changes are blocked */
+ ASSERT_RTNL();
+
+ switch_macaddr = dev->switch_macaddr;
+ if (!refcount_dec_and_test(&switch_macaddr->refcount))
+ return;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ ksz_write8(dev, regs[REG_SW_MAC_ADDR] + i, 0);
+
+ dev->switch_macaddr = NULL;
+ kfree(switch_macaddr);
+}
+
+static int ksz_hsr_join(struct dsa_switch *ds, int port, struct net_device *hsr,
+ struct netlink_ext_ack *extack)
+{
+ struct ksz_device *dev = ds->priv;
+ enum hsr_version ver;
+ int ret;
+
+ ret = hsr_get_version(hsr, &ver);
+ if (ret)
+ return ret;
+
+ if (dev->chip_id != KSZ9477_CHIP_ID) {
+ NL_SET_ERR_MSG_MOD(extack, "Chip does not support HSR offload");
+ return -EOPNOTSUPP;
+ }
+
+ /* KSZ9477 can support HW offloading of only 1 HSR device */
+ if (dev->hsr_dev && hsr != dev->hsr_dev) {
+ NL_SET_ERR_MSG_MOD(extack, "Offload supported for a single HSR");
+ return -EOPNOTSUPP;
+ }
+
+ /* KSZ9477 only supports HSR v0 and v1 */
+ if (!(ver == HSR_V0 || ver == HSR_V1)) {
+ NL_SET_ERR_MSG_MOD(extack, "Only HSR v0 and v1 supported");
+ return -EOPNOTSUPP;
+ }
+
+ /* Self MAC address filtering, to avoid frames traversing
+ * the HSR ring more than once.
+ */
+ ret = ksz_switch_macaddr_get(ds, port, extack);
+ if (ret)
+ return ret;
+
+ ksz9477_hsr_join(ds, port, hsr);
+ dev->hsr_dev = hsr;
+ dev->hsr_ports |= BIT(port);
+
+ return 0;
+}
+
+static int ksz_hsr_leave(struct dsa_switch *ds, int port,
+ struct net_device *hsr)
+{
+ struct ksz_device *dev = ds->priv;
+
+ WARN_ON(dev->chip_id != KSZ9477_CHIP_ID);
+
+ ksz9477_hsr_leave(ds, port, hsr);
+ dev->hsr_ports &= ~BIT(port);
+ if (!dev->hsr_ports)
+ dev->hsr_dev = NULL;
+
+ ksz_switch_macaddr_put(ds);
+
+ return 0;
+}
+
static const struct dsa_switch_ops ksz_switch_ops = {
.get_tag_protocol = ksz_get_tag_protocol,
.connect_tag_protocol = ksz_connect_tag_protocol,
@@ -3439,14 +3784,18 @@ static const struct dsa_switch_ops ksz_switch_ops = {
.phylink_mac_config = ksz_phylink_mac_config,
.phylink_mac_link_up = ksz_phylink_mac_link_up,
.phylink_mac_link_down = ksz_mac_link_down,
- .port_enable = ksz_enable_port,
+ .port_setup = ksz_port_setup,
.set_ageing_time = ksz_set_ageing_time,
.get_strings = ksz_get_strings,
.get_ethtool_stats = ksz_get_ethtool_stats,
.get_sset_count = ksz_sset_count,
.port_bridge_join = ksz_port_bridge_join,
.port_bridge_leave = ksz_port_bridge_leave,
+ .port_hsr_join = ksz_hsr_join,
+ .port_hsr_leave = ksz_hsr_leave,
+ .port_set_mac_address = ksz_port_set_mac_address,
.port_stp_state_set = ksz_port_stp_state_set,
+ .port_teardown = ksz_port_teardown,
.port_pre_bridge_flags = ksz_port_pre_bridge_flags,
.port_bridge_flags = ksz_port_bridge_flags,
.port_fast_age = ksz_port_fast_age,
@@ -3464,11 +3813,15 @@ static const struct dsa_switch_ops ksz_switch_ops = {
.get_pause_stats = ksz_get_pause_stats,
.port_change_mtu = ksz_change_mtu,
.port_max_mtu = ksz_max_mtu,
+ .get_wol = ksz_get_wol,
+ .set_wol = ksz_set_wol,
.get_ts_info = ksz_get_ts_info,
.port_hwtstamp_get = ksz_hwtstamp_get,
.port_hwtstamp_set = ksz_hwtstamp_set,
.port_txtstamp = ksz_port_txtstamp,
.port_rxtstamp = ksz_port_rxtstamp,
+ .cls_flower_add = ksz_cls_flower_add,
+ .cls_flower_del = ksz_cls_flower_del,
.port_setup_tc = ksz_setup_tc,
.get_mac_eee = ksz_get_mac_eee,
.set_mac_eee = ksz_set_mac_eee,
@@ -3501,6 +3854,30 @@ struct ksz_device *ksz_switch_alloc(struct device *base, void *priv)
}
EXPORT_SYMBOL(ksz_switch_alloc);
+/**
+ * ksz_switch_shutdown - Shutdown routine for the switch device.
+ * @dev: The switch device structure.
+ *
+ * This function is responsible for initiating a shutdown sequence for the
+ * switch device. It invokes the reset operation defined in the device
+ * operations, if available, to reset the switch. Subsequently, it calls the
+ * DSA framework's shutdown function to ensure a proper shutdown of the DSA
+ * switch.
+ */
+void ksz_switch_shutdown(struct ksz_device *dev)
+{
+ bool wol_enabled = false;
+
+ if (dev->dev_ops->wol_pre_shutdown)
+ dev->dev_ops->wol_pre_shutdown(dev, &wol_enabled);
+
+ if (dev->dev_ops->reset && !wol_enabled)
+ dev->dev_ops->reset(dev);
+
+ dsa_switch_shutdown(dev->ds);
+}
+EXPORT_SYMBOL(ksz_switch_shutdown);
+
static void ksz_parse_rgmii_delay(struct ksz_device *dev, int port_num,
struct device_node *port_dn)
{
@@ -3538,6 +3915,245 @@ static void ksz_parse_rgmii_delay(struct ksz_device *dev, int port_num,
dev->ports[port_num].rgmii_tx_val = tx_delay;
}
+/**
+ * ksz_drive_strength_to_reg() - Convert drive strength value to corresponding
+ * register value.
+ * @array: The array of drive strength values to search.
+ * @array_size: The size of the array.
+ * @microamp: The drive strength value in microamp to be converted.
+ *
+ * This function searches the array of drive strength values for the given
+ * microamp value and returns the corresponding register value for that drive.
+ *
+ * Returns: If found, the corresponding register value for that drive strength
+ * is returned. Otherwise, -EINVAL is returned indicating an invalid value.
+ */
+static int ksz_drive_strength_to_reg(const struct ksz_drive_strength *array,
+ size_t array_size, int microamp)
+{
+ int i;
+
+ for (i = 0; i < array_size; i++) {
+ if (array[i].microamp == microamp)
+ return array[i].reg_val;
+ }
+
+ return -EINVAL;
+}
+
+/**
+ * ksz_drive_strength_error() - Report invalid drive strength value
+ * @dev: ksz device
+ * @array: The array of drive strength values to search.
+ * @array_size: The size of the array.
+ * @microamp: Invalid drive strength value in microamp
+ *
+ * This function logs an error message when an unsupported drive strength value
+ * is detected. It lists out all the supported drive strength values for
+ * reference in the error message.
+ */
+static void ksz_drive_strength_error(struct ksz_device *dev,
+ const struct ksz_drive_strength *array,
+ size_t array_size, int microamp)
+{
+ char supported_values[100];
+ size_t remaining_size;
+ int added_len;
+ char *ptr;
+ int i;
+
+ remaining_size = sizeof(supported_values);
+ ptr = supported_values;
+
+ for (i = 0; i < array_size; i++) {
+ added_len = snprintf(ptr, remaining_size,
+ i == 0 ? "%d" : ", %d", array[i].microamp);
+
+ if (added_len >= remaining_size)
+ break;
+
+ ptr += added_len;
+ remaining_size -= added_len;
+ }
+
+ dev_err(dev->dev, "Invalid drive strength %d, supported values are %s\n",
+ microamp, supported_values);
+}
+
+/**
+ * ksz9477_drive_strength_write() - Set the drive strength for specific KSZ9477
+ * chip variants.
+ * @dev: ksz device
+ * @props: Array of drive strength properties to be applied
+ * @num_props: Number of properties in the array
+ *
+ * This function configures the drive strength for various KSZ9477 chip variants
+ * based on the provided properties. It handles chip-specific nuances and
+ * ensures only valid drive strengths are written to the respective chip.
+ *
+ * Return: 0 on successful configuration, a negative error code on failure.
+ */
+static int ksz9477_drive_strength_write(struct ksz_device *dev,
+ struct ksz_driver_strength_prop *props,
+ int num_props)
+{
+ size_t array_size = ARRAY_SIZE(ksz9477_drive_strengths);
+ int i, ret, reg;
+ u8 mask = 0;
+ u8 val = 0;
+
+ if (props[KSZ_DRIVER_STRENGTH_IO].value != -1)
+ dev_warn(dev->dev, "%s is not supported by this chip variant\n",
+ props[KSZ_DRIVER_STRENGTH_IO].name);
+
+ if (dev->chip_id == KSZ8795_CHIP_ID ||
+ dev->chip_id == KSZ8794_CHIP_ID ||
+ dev->chip_id == KSZ8765_CHIP_ID)
+ reg = KSZ8795_REG_SW_CTRL_20;
+ else
+ reg = KSZ9477_REG_SW_IO_STRENGTH;
+
+ for (i = 0; i < num_props; i++) {
+ if (props[i].value == -1)
+ continue;
+
+ ret = ksz_drive_strength_to_reg(ksz9477_drive_strengths,
+ array_size, props[i].value);
+ if (ret < 0) {
+ ksz_drive_strength_error(dev, ksz9477_drive_strengths,
+ array_size, props[i].value);
+ return ret;
+ }
+
+ mask |= SW_DRIVE_STRENGTH_M << props[i].offset;
+ val |= ret << props[i].offset;
+ }
+
+ return ksz_rmw8(dev, reg, mask, val);
+}
+
+/**
+ * ksz8830_drive_strength_write() - Set the drive strength configuration for
+ * KSZ8830 compatible chip variants.
+ * @dev: ksz device
+ * @props: Array of drive strength properties to be set
+ * @num_props: Number of properties in the array
+ *
+ * This function applies the specified drive strength settings to KSZ8830 chip
+ * variants (KSZ8873, KSZ8863).
+ * It ensures the configurations align with what the chip variant supports and
+ * warns or errors out on unsupported settings.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+static int ksz8830_drive_strength_write(struct ksz_device *dev,
+ struct ksz_driver_strength_prop *props,
+ int num_props)
+{
+ size_t array_size = ARRAY_SIZE(ksz8830_drive_strengths);
+ int microamp;
+ int i, ret;
+
+ for (i = 0; i < num_props; i++) {
+ if (props[i].value == -1 || i == KSZ_DRIVER_STRENGTH_IO)
+ continue;
+
+ dev_warn(dev->dev, "%s is not supported by this chip variant\n",
+ props[i].name);
+ }
+
+ microamp = props[KSZ_DRIVER_STRENGTH_IO].value;
+ ret = ksz_drive_strength_to_reg(ksz8830_drive_strengths, array_size,
+ microamp);
+ if (ret < 0) {
+ ksz_drive_strength_error(dev, ksz8830_drive_strengths,
+ array_size, microamp);
+ return ret;
+ }
+
+ return ksz_rmw8(dev, KSZ8873_REG_GLOBAL_CTRL_12,
+ KSZ8873_DRIVE_STRENGTH_16MA, ret);
+}
+
+/**
+ * ksz_parse_drive_strength() - Extract and apply drive strength configurations
+ * from device tree properties.
+ * @dev: ksz device
+ *
+ * This function reads the specified drive strength properties from the
+ * device tree, validates against the supported chip variants, and sets
+ * them accordingly. An error should be critical here, as the drive strength
+ * settings are crucial for EMI compliance.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+static int ksz_parse_drive_strength(struct ksz_device *dev)
+{
+ struct ksz_driver_strength_prop of_props[] = {
+ [KSZ_DRIVER_STRENGTH_HI] = {
+ .name = "microchip,hi-drive-strength-microamp",
+ .offset = SW_HI_SPEED_DRIVE_STRENGTH_S,
+ .value = -1,
+ },
+ [KSZ_DRIVER_STRENGTH_LO] = {
+ .name = "microchip,lo-drive-strength-microamp",
+ .offset = SW_LO_SPEED_DRIVE_STRENGTH_S,
+ .value = -1,
+ },
+ [KSZ_DRIVER_STRENGTH_IO] = {
+ .name = "microchip,io-drive-strength-microamp",
+ .offset = 0, /* don't care */
+ .value = -1,
+ },
+ };
+ struct device_node *np = dev->dev->of_node;
+ bool have_any_prop = false;
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(of_props); i++) {
+ ret = of_property_read_u32(np, of_props[i].name,
+ &of_props[i].value);
+ if (ret && ret != -EINVAL)
+ dev_warn(dev->dev, "Failed to read %s\n",
+ of_props[i].name);
+ if (ret)
+ continue;
+
+ have_any_prop = true;
+ }
+
+ if (!have_any_prop)
+ return 0;
+
+ switch (dev->chip_id) {
+ case KSZ8830_CHIP_ID:
+ return ksz8830_drive_strength_write(dev, of_props,
+ ARRAY_SIZE(of_props));
+ case KSZ8795_CHIP_ID:
+ case KSZ8794_CHIP_ID:
+ case KSZ8765_CHIP_ID:
+ case KSZ8563_CHIP_ID:
+ case KSZ9477_CHIP_ID:
+ case KSZ9563_CHIP_ID:
+ case KSZ9567_CHIP_ID:
+ case KSZ9893_CHIP_ID:
+ case KSZ9896_CHIP_ID:
+ case KSZ9897_CHIP_ID:
+ return ksz9477_drive_strength_write(dev, of_props,
+ ARRAY_SIZE(of_props));
+ default:
+ for (i = 0; i < ARRAY_SIZE(of_props); i++) {
+ if (of_props[i].value == -1)
+ continue;
+
+ dev_warn(dev->dev, "%s is not supported by this chip variant\n",
+ of_props[i].name);
+ }
+ }
+
+ return 0;
+}
+
int ksz_switch_register(struct ksz_device *dev)
{
const struct ksz_chip_data *info;
@@ -3620,6 +4236,10 @@ int ksz_switch_register(struct ksz_device *dev)
for (port_num = 0; port_num < dev->info->port_cnt; ++port_num)
dev->ports[port_num].interface = PHY_INTERFACE_MODE_NA;
if (dev->dev->of_node) {
+ ret = ksz_parse_drive_strength(dev);
+ if (ret)
+ return ret;
+
ret = of_get_phy_mode(dev->dev->of_node, &interface);
if (ret == 0)
dev->compat_interface = interface;
@@ -3651,6 +4271,9 @@ int ksz_switch_register(struct ksz_device *dev)
dev_err(dev->dev, "inconsistent synclko settings\n");
return -EINVAL;
}
+
+ dev->wakeup_source = of_property_read_bool(dev->dev->of_node,
+ "wakeup-source");
}
ret = dsa_register_switch(dev->ds);