This makes of_phy_device_connect() work properly when the phy is
specified in the device tree. Without it of_mdio_find_phy() will
not find the right device. It will match:
bus->parent->device_node == phy_node->parent
Without this patch bus->parent->device_node will be the ethernet node
and phy_node->parent will be the ti,cpsw-mdio node. With the MDIO device
node registered as device of its own both nodes above will be the
ti,cpsw-mdio node.
Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de>
---
drivers/net/cpsw.c | 178 ++++++++++++++++++++++++---------------------
1 file changed, 96 insertions(+), 82 deletions(-)
diff --git a/drivers/net/cpsw.c b/drivers/net/cpsw.c
index df8981d02e..b9a6575009 100644
--- a/drivers/net/cpsw.c
+++ b/drivers/net/cpsw.c
@@ -191,7 +191,6 @@ struct cpdma_chan {
struct cpsw_priv {
struct device_d *dev;
- struct mii_bus miibus;
u32 version;
struct cpsw_platform_data data;
@@ -199,7 +198,6 @@ struct cpsw_priv {
uint8_t mac_addr[6];
struct cpsw_regs *regs;
- struct cpsw_mdio_regs *mdio_regs;
void *dma_regs;
struct cpsw_host_regs *host_port_regs;
void *ale_regs;
@@ -219,6 +217,12 @@ struct cpsw_priv {
struct cpsw_slave *slaves;
};
+struct cpsw_mdio_priv {
+ struct device_d *dev;
+ struct mii_bus miibus;
+ struct cpsw_mdio_regs *mdio_regs;
+};
+
static int cpsw_ale_get_field(u32 *ale_entry, u32 start, u32 bits)
{
int idx;
@@ -450,7 +454,7 @@ static inline void cpsw_ale_port_state(struct cpsw_priv
*priv, int port,
}
/* wait until hardware is ready for another user access */
-static u32 wait_for_user_access(struct cpsw_priv *priv)
+static u32 wait_for_user_access(struct cpsw_mdio_priv *priv)
{
struct cpsw_mdio_regs *mdio_regs = priv->mdio_regs;
u32 tmp;
@@ -473,7 +477,7 @@ static u32 wait_for_user_access(struct cpsw_priv *priv)
static int cpsw_mdio_read(struct mii_bus *bus, int phy_id, int phy_reg)
{
- struct cpsw_priv *priv = bus->priv;
+ struct cpsw_mdio_priv *priv = bus->priv;
struct cpsw_mdio_regs *mdio_regs = priv->mdio_regs;
u32 tmp;
@@ -494,7 +498,7 @@ static int cpsw_mdio_read(struct mii_bus *bus, int phy_id,
int phy_reg)
static int cpsw_mdio_write(struct mii_bus *bus, int phy_id, int phy_reg, u16
value)
{
- struct cpsw_priv *priv = bus->priv;
+ struct cpsw_mdio_priv *priv = bus->priv;
struct cpsw_mdio_regs *mdio_regs = priv->mdio_regs;
u32 tmp;
@@ -510,6 +514,81 @@ static int cpsw_mdio_write(struct mii_bus *bus, int
phy_id, int phy_reg, u16 val
return 0;
}
+static int cpsw_mdio_probe(struct device_d *dev)
+{
+ struct resource *iores;
+ struct cpsw_mdio_priv *priv;
+ uint64_t start;
+ uint32_t phy_mask;
+ int ret;
+
+ priv = xzalloc(sizeof(*priv));
+
+ iores = dev_request_mem_resource(dev, 0);
+ if (IS_ERR(iores))
+ return PTR_ERR(iores);
+ priv->mdio_regs = IOMEM(iores->start);
+ priv->miibus.read = cpsw_mdio_read;
+ priv->miibus.write = cpsw_mdio_write;
+ priv->miibus.priv = priv;
+ priv->miibus.parent = dev;
+
+ /*
+ * set enable and clock divider
+ *
+ * FIXME: Use a clock to calculate the divider
+ */
+ writel(0xff | CONTROL_ENABLE, &priv->mdio_regs->control);
+
+ /*
+ * wait for scan logic to settle:
+ * the scan time consists of (a) a large fixed component, and (b) a
+ * small component that varies with the mii bus frequency. These
+ * were estimated using measurements at 1.1 and 2.2 MHz on tnetv107x
+ * silicon. Since the effect of (b) was found to be largely
+ * negligible, we keep things simple here.
+ */
+ udelay(1000);
+
+ start = get_time_ns();
+ while (1) {
+ phy_mask = readl(&priv->mdio_regs->alive);
+ if (phy_mask) {
+ dev_info(dev, "detected phy mask 0x%x\n", phy_mask);
+ phy_mask = ~phy_mask;
+ break;
+ }
+ if (is_timeout(start, 256 * MSECOND)) {
+ dev_err(dev, "no live phy, scanning all\n");
+ phy_mask = 0;
+ break;
+ }
+ }
+
+ priv->miibus.phy_mask = phy_mask;
+
+ ret = mdiobus_register(&priv->miibus);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static __maybe_unused struct of_device_id cpsw_mdio_dt_ids[] = {
+ {
+ .compatible = "ti,cpsw-mdio",
+ }, {
+ /* sentinel */
+ }
+};
+
+static struct driver_d cpsw_mdio_driver = {
+ .name = "cpsw-mdio",
+ .probe = cpsw_mdio_probe,
+ .of_compatible = DRV_OF_COMPAT(cpsw_mdio_dt_ids),
+};
+coredevice_platform_driver(cpsw_mdio_driver);
+
static inline void soft_reset(struct cpsw_priv *priv, void *reg)
{
int ret;
@@ -549,9 +628,9 @@ static int cpsw_set_hwaddr(struct eth_device *edev, const
unsigned char *mac)
return 0;
}
-static void cpsw_slave_update_link(struct cpsw_slave *slave,
- struct cpsw_priv *priv, int *link)
+static void cpsw_adjust_link(struct eth_device *edev)
{
+ struct cpsw_slave *slave = edev->priv;
struct phy_device *phydev = slave->edev.phydev;
u32 mac_control = 0;
@@ -561,7 +640,6 @@ static void cpsw_slave_update_link(struct cpsw_slave *slave,
return;
if (phydev->link) {
- *link = 1;
mac_control = BIT(5); /* MIIEN */
if (phydev->speed == SPEED_10)
mac_control |= BIT(18); /* In Band mode */
@@ -584,27 +662,6 @@ static void cpsw_slave_update_link(struct cpsw_slave
*slave,
writel(mac_control, &slave->sliver->mac_control);
}
-static int cpsw_update_link(struct cpsw_slave *slave, struct cpsw_priv *priv)
-{
- int link = 0;
-
- dev_dbg(&slave->dev, "* %s\n", __func__);
-
- cpsw_slave_update_link(slave, priv, &link);
-
- return link;
-}
-
-static void cpsw_adjust_link(struct eth_device *edev)
-{
- struct cpsw_slave *slave = edev->priv;
- struct cpsw_priv *priv = slave->cpsw;
-
- dev_dbg(&slave->dev, "* %s\n", __func__);
-
- cpsw_update_link(slave, priv);
-}
-
static inline u32 cpsw_get_slave_port(struct cpsw_priv *priv, u32 slave_num)
{
if (priv->host_port == 0)
@@ -748,6 +805,11 @@ static int cpsw_open(struct eth_device *edev)
dev_dbg(&slave->dev, "* %s\n", __func__);
+ ret = phy_device_connect(edev, NULL, slave->phy_id,
+ cpsw_adjust_link, 0, slave->phy_if);
+ if (ret)
+ return ret;
+
/* soft reset the controller and initialize priv */
soft_reset(priv, &priv->regs->soft_reset);
@@ -774,7 +836,6 @@ static int cpsw_open(struct eth_device *edev)
cpsw_ale_add_mcast(priv, ethbdaddr, 1 << priv->host_port);
cpsw_slave_init(slave, priv);
- cpsw_update_link(slave, priv);
/* init descriptor pool */
for (i = 0; i < NUM_DESCS; i++) {
@@ -898,11 +959,6 @@ static int cpsw_slave_setup(struct cpsw_slave *slave, int
slave_num,
edev->parent = dev;
- ret = phy_device_connect(edev, &priv->miibus, slave->phy_id,
- cpsw_adjust_link, 0, slave->phy_if);
- if (ret)
- goto err_out;
-
dev_set_name(dev, "cpsw-slave");
dev->id = slave->slave_num;
dev->parent = priv->dev;
@@ -936,7 +992,7 @@ err_register_dev:
phy_unregister_device(edev->phydev);
err_register_edev:
unregister_device(dev);
-err_out:
+
slave->slave_num = -1;
return ret;
@@ -1117,13 +1173,15 @@ static int cpsw_probe(struct device_d *dev)
struct cpsw_platform_data *data = (struct cpsw_platform_data
*)dev->platform_data;
struct cpsw_priv *priv;
void __iomem *regs;
- uint64_t start;
- uint32_t phy_mask;
struct cpsw_data *cpsw_data;
int i, ret;
dev_dbg(dev, "* %s\n", __func__);
+ ret = of_platform_populate(dev->device_node, NULL, dev);
+ if (ret)
+ return ret;
+
iores = dev_request_mem_resource(dev, 0);
if (IS_ERR(iores))
return PTR_ERR(iores);
@@ -1168,53 +1226,11 @@ static int cpsw_probe(struct device_d *dev)
priv->dma_regs = regs + cpsw_data->cpdma_reg_ofs;
priv->ale_regs = regs + cpsw_data->ale_reg_ofs;
priv->state_ram = regs + cpsw_data->state_ram_ofs;
- priv->mdio_regs = regs + cpsw_data->mdio_reg_ofs;
priv->slave_ofs = cpsw_data->slave_ofs;
priv->slave_size = cpsw_data->slave_size;
priv->sliver_ofs = cpsw_data->sliver_ofs;
- priv->miibus.read = cpsw_mdio_read;
- priv->miibus.write = cpsw_mdio_write;
- priv->miibus.priv = priv;
- priv->miibus.parent = dev;
-
- /*
- * set enable and clock divider
- *
- * FIXME: Use a clock to calculate the divider
- */
- writel(0xff | CONTROL_ENABLE, &priv->mdio_regs->control);
-
- /*
- * wait for scan logic to settle:
- * the scan time consists of (a) a large fixed component, and (b) a
- * small component that varies with the mii bus frequency. These
- * were estimated using measurements at 1.1 and 2.2 MHz on tnetv107x
- * silicon. Since the effect of (b) was found to be largely
- * negligible, we keep things simple here.
- */
- udelay(1000);
-
- start = get_time_ns();
- while (1) {
- phy_mask = readl(&priv->mdio_regs->alive);
- if (phy_mask) {
- dev_info(dev, "detected phy mask 0x%x\n", phy_mask);
- phy_mask = ~phy_mask;
- break;
- }
- if (is_timeout(start, 256 * MSECOND)) {
- dev_err(dev, "no live phy, scanning all\n");
- phy_mask = 0;
- break;
- }
- }
-
- priv->miibus.phy_mask = phy_mask;
-
- mdiobus_register(&priv->miibus);
-
for (i = 0; i < priv->num_slaves; i++) {
ret = cpsw_slave_setup(&priv->slaves[i], i, priv);
if (ret) {
@@ -1245,8 +1261,6 @@ static void cpsw_remove(struct device_d *dev)
eth_unregister(&slave->edev);
}
-
- mdiobus_unregister(&priv->miibus);
}
static __maybe_unused struct of_device_id cpsw_dt_ids[] = {
--
2.23.0
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