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path: root/drivers/net/phy/mdio-bcm-unimac.c
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Diffstat (limited to 'drivers/net/phy/mdio-bcm-unimac.c')
-rw-r--r--drivers/net/phy/mdio-bcm-unimac.c103
1 files changed, 70 insertions, 33 deletions
diff --git a/drivers/net/phy/mdio-bcm-unimac.c b/drivers/net/phy/mdio-bcm-unimac.c
index 34395230ce70..08e0647b85e2 100644
--- a/drivers/net/phy/mdio-bcm-unimac.c
+++ b/drivers/net/phy/mdio-bcm-unimac.c
@@ -21,6 +21,8 @@
#include <linux/of_platform.h>
#include <linux/of_mdio.h>
+#include <linux/platform_data/mdio-bcm-unimac.h>
+
#define MDIO_CMD 0x00
#define MDIO_START_BUSY (1 << 29)
#define MDIO_READ_FAIL (1 << 28)
@@ -41,46 +43,80 @@
struct unimac_mdio_priv {
struct mii_bus *mii_bus;
void __iomem *base;
+ int (*wait_func) (void *wait_func_data);
+ void *wait_func_data;
};
+static inline u32 unimac_mdio_readl(struct unimac_mdio_priv *priv, u32 offset)
+{
+ /* MIPS chips strapped for BE will automagically configure the
+ * peripheral registers for CPU-native byte order.
+ */
+ if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
+ return __raw_readl(priv->base + offset);
+ else
+ return readl_relaxed(priv->base + offset);
+}
+
+static inline void unimac_mdio_writel(struct unimac_mdio_priv *priv, u32 val,
+ u32 offset)
+{
+ if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
+ __raw_writel(val, priv->base + offset);
+ else
+ writel_relaxed(val, priv->base + offset);
+}
+
static inline void unimac_mdio_start(struct unimac_mdio_priv *priv)
{
u32 reg;
- reg = __raw_readl(priv->base + MDIO_CMD);
+ reg = unimac_mdio_readl(priv, MDIO_CMD);
reg |= MDIO_START_BUSY;
- __raw_writel(reg, priv->base + MDIO_CMD);
+ unimac_mdio_writel(priv, reg, MDIO_CMD);
}
static inline unsigned int unimac_mdio_busy(struct unimac_mdio_priv *priv)
{
- return __raw_readl(priv->base + MDIO_CMD) & MDIO_START_BUSY;
+ return unimac_mdio_readl(priv, MDIO_CMD) & MDIO_START_BUSY;
+}
+
+static int unimac_mdio_poll(void *wait_func_data)
+{
+ struct unimac_mdio_priv *priv = wait_func_data;
+ unsigned int timeout = 1000;
+
+ do {
+ if (!unimac_mdio_busy(priv))
+ return 0;
+
+ usleep_range(1000, 2000);
+ } while (--timeout);
+
+ if (!timeout)
+ return -ETIMEDOUT;
+
+ return 0;
}
static int unimac_mdio_read(struct mii_bus *bus, int phy_id, int reg)
{
struct unimac_mdio_priv *priv = bus->priv;
- unsigned int timeout = 1000;
+ int ret;
u32 cmd;
/* Prepare the read operation */
cmd = MDIO_RD | (phy_id << MDIO_PMD_SHIFT) | (reg << MDIO_REG_SHIFT);
- __raw_writel(cmd, priv->base + MDIO_CMD);
+ unimac_mdio_writel(priv, cmd, MDIO_CMD);
/* Start MDIO transaction */
unimac_mdio_start(priv);
- do {
- if (!unimac_mdio_busy(priv))
- break;
+ ret = priv->wait_func(priv->wait_func_data);
+ if (ret)
+ return ret;
- usleep_range(1000, 2000);
- } while (timeout--);
-
- if (!timeout)
- return -ETIMEDOUT;
-
- cmd = __raw_readl(priv->base + MDIO_CMD);
+ cmd = unimac_mdio_readl(priv, MDIO_CMD);
/* Some broken devices are known not to release the line during
* turn-around, e.g: Broadcom BCM53125 external switches, so check for
@@ -97,27 +133,16 @@ static int unimac_mdio_write(struct mii_bus *bus, int phy_id,
int reg, u16 val)
{
struct unimac_mdio_priv *priv = bus->priv;
- unsigned int timeout = 1000;
u32 cmd;
/* Prepare the write operation */
cmd = MDIO_WR | (phy_id << MDIO_PMD_SHIFT) |
(reg << MDIO_REG_SHIFT) | (0xffff & val);
- __raw_writel(cmd, priv->base + MDIO_CMD);
+ unimac_mdio_writel(priv, cmd, MDIO_CMD);
unimac_mdio_start(priv);
- do {
- if (!unimac_mdio_busy(priv))
- break;
-
- usleep_range(1000, 2000);
- } while (timeout--);
-
- if (!timeout)
- return -ETIMEDOUT;
-
- return 0;
+ return priv->wait_func(priv->wait_func_data);
}
/* Workaround for integrated BCM7xxx Gigabit PHYs which have a problem with
@@ -155,8 +180,10 @@ static int unimac_mdio_reset(struct mii_bus *bus)
}
for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
- if (read_mask & 1 << addr)
+ if (read_mask & 1 << addr) {
+ dev_dbg(&bus->dev, "Workaround for PHY @ %d\n", addr);
mdiobus_read(bus, addr, MII_BMSR);
+ }
}
return 0;
@@ -164,6 +191,7 @@ static int unimac_mdio_reset(struct mii_bus *bus)
static int unimac_mdio_probe(struct platform_device *pdev)
{
+ struct unimac_mdio_pdata *pdata = pdev->dev.platform_data;
struct unimac_mdio_priv *priv;
struct device_node *np;
struct mii_bus *bus;
@@ -193,12 +221,21 @@ static int unimac_mdio_probe(struct platform_device *pdev)
bus = priv->mii_bus;
bus->priv = priv;
- bus->name = "unimac MII bus";
+ if (pdata) {
+ bus->name = pdata->bus_name;
+ priv->wait_func = pdata->wait_func;
+ priv->wait_func_data = pdata->wait_func_data;
+ bus->phy_mask = ~pdata->phy_mask;
+ } else {
+ bus->name = "unimac MII bus";
+ priv->wait_func_data = priv;
+ priv->wait_func = unimac_mdio_poll;
+ }
bus->parent = &pdev->dev;
bus->read = unimac_mdio_read;
bus->write = unimac_mdio_write;
bus->reset = unimac_mdio_reset;
- snprintf(bus->id, MII_BUS_ID_SIZE, "%s", pdev->name);
+ snprintf(bus->id, MII_BUS_ID_SIZE, "%s-%d", pdev->name, pdev->id);
ret = of_mdiobus_register(bus, np);
if (ret) {
@@ -240,7 +277,7 @@ MODULE_DEVICE_TABLE(of, unimac_mdio_ids);
static struct platform_driver unimac_mdio_driver = {
.driver = {
- .name = "unimac-mdio",
+ .name = UNIMAC_MDIO_DRV_NAME,
.of_match_table = unimac_mdio_ids,
},
.probe = unimac_mdio_probe,
@@ -251,4 +288,4 @@ module_platform_driver(unimac_mdio_driver);
MODULE_AUTHOR("Broadcom Corporation");
MODULE_DESCRIPTION("Broadcom UniMAC MDIO bus controller");
MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:unimac-mdio");
+MODULE_ALIAS("platform:" UNIMAC_MDIO_DRV_NAME);