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path: root/drivers/net/ethernet/marvell/mvmdio.c
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Diffstat (limited to 'drivers/net/ethernet/marvell/mvmdio.c')
-rw-r--r--drivers/net/ethernet/marvell/mvmdio.c214
1 files changed, 158 insertions, 56 deletions
diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c
index 90a60b98c28e..c9798210fa0f 100644
--- a/drivers/net/ethernet/marvell/mvmdio.c
+++ b/drivers/net/ethernet/marvell/mvmdio.c
@@ -17,41 +17,52 @@
* warranty of any kind, whether express or implied.
*/
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/mutex.h>
+#include <linux/of_device.h>
+#include <linux/of_mdio.h>
#include <linux/phy.h>
-#include <linux/interrupt.h>
#include <linux/platform_device.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/of_mdio.h>
#include <linux/sched.h>
#include <linux/wait.h>
-#define MVMDIO_SMI_DATA_SHIFT 0
-#define MVMDIO_SMI_PHY_ADDR_SHIFT 16
-#define MVMDIO_SMI_PHY_REG_SHIFT 21
-#define MVMDIO_SMI_READ_OPERATION BIT(26)
-#define MVMDIO_SMI_WRITE_OPERATION 0
-#define MVMDIO_SMI_READ_VALID BIT(27)
-#define MVMDIO_SMI_BUSY BIT(28)
-#define MVMDIO_ERR_INT_CAUSE 0x007C
-#define MVMDIO_ERR_INT_SMI_DONE 0x00000010
-#define MVMDIO_ERR_INT_MASK 0x0080
+#define MVMDIO_SMI_DATA_SHIFT 0
+#define MVMDIO_SMI_PHY_ADDR_SHIFT 16
+#define MVMDIO_SMI_PHY_REG_SHIFT 21
+#define MVMDIO_SMI_READ_OPERATION BIT(26)
+#define MVMDIO_SMI_WRITE_OPERATION 0
+#define MVMDIO_SMI_READ_VALID BIT(27)
+#define MVMDIO_SMI_BUSY BIT(28)
+#define MVMDIO_ERR_INT_CAUSE 0x007C
+#define MVMDIO_ERR_INT_SMI_DONE 0x00000010
+#define MVMDIO_ERR_INT_MASK 0x0080
+
+#define MVMDIO_XSMI_MGNT_REG 0x0
+#define MVMDIO_XSMI_PHYADDR_SHIFT 16
+#define MVMDIO_XSMI_DEVADDR_SHIFT 21
+#define MVMDIO_XSMI_WRITE_OPERATION (0x5 << 26)
+#define MVMDIO_XSMI_READ_OPERATION (0x7 << 26)
+#define MVMDIO_XSMI_READ_VALID BIT(29)
+#define MVMDIO_XSMI_BUSY BIT(30)
+#define MVMDIO_XSMI_ADDR_REG 0x8
/*
* SMI Timeout measurements:
* - Kirkwood 88F6281 (Globalscale Dreamplug): 45us to 95us (Interrupt)
* - Armada 370 (Globalscale Mirabox): 41us to 43us (Polled)
*/
-#define MVMDIO_SMI_TIMEOUT 1000 /* 1000us = 1ms */
-#define MVMDIO_SMI_POLL_INTERVAL_MIN 45
-#define MVMDIO_SMI_POLL_INTERVAL_MAX 55
+#define MVMDIO_SMI_TIMEOUT 1000 /* 1000us = 1ms */
+#define MVMDIO_SMI_POLL_INTERVAL_MIN 45
+#define MVMDIO_SMI_POLL_INTERVAL_MAX 55
+
+#define MVMDIO_XSMI_POLL_INTERVAL_MIN 150
+#define MVMDIO_XSMI_POLL_INTERVAL_MAX 160
struct orion_mdio_dev {
- struct mutex lock;
void __iomem *regs;
struct clk *clk[3];
/*
@@ -64,14 +75,21 @@ struct orion_mdio_dev {
wait_queue_head_t smi_busy_wait;
};
-static int orion_mdio_smi_is_done(struct orion_mdio_dev *dev)
-{
- return !(readl(dev->regs) & MVMDIO_SMI_BUSY);
-}
+enum orion_mdio_bus_type {
+ BUS_TYPE_SMI,
+ BUS_TYPE_XSMI
+};
+
+struct orion_mdio_ops {
+ int (*is_done)(struct orion_mdio_dev *);
+ unsigned int poll_interval_min;
+ unsigned int poll_interval_max;
+};
/* Wait for the SMI unit to be ready for another operation
*/
-static int orion_mdio_wait_ready(struct mii_bus *bus)
+static int orion_mdio_wait_ready(const struct orion_mdio_ops *ops,
+ struct mii_bus *bus)
{
struct orion_mdio_dev *dev = bus->priv;
unsigned long timeout = usecs_to_jiffies(MVMDIO_SMI_TIMEOUT);
@@ -79,14 +97,14 @@ static int orion_mdio_wait_ready(struct mii_bus *bus)
int timedout = 0;
while (1) {
- if (orion_mdio_smi_is_done(dev))
+ if (ops->is_done(dev))
return 0;
else if (timedout)
break;
if (dev->err_interrupt <= 0) {
- usleep_range(MVMDIO_SMI_POLL_INTERVAL_MIN,
- MVMDIO_SMI_POLL_INTERVAL_MAX);
+ usleep_range(ops->poll_interval_min,
+ ops->poll_interval_max);
if (time_is_before_jiffies(end))
++timedout;
@@ -98,8 +116,7 @@ static int orion_mdio_wait_ready(struct mii_bus *bus)
if (timeout < 2)
timeout = 2;
wait_event_timeout(dev->smi_busy_wait,
- orion_mdio_smi_is_done(dev),
- timeout);
+ ops->is_done(dev), timeout);
++timedout;
}
@@ -109,52 +126,61 @@ static int orion_mdio_wait_ready(struct mii_bus *bus)
return -ETIMEDOUT;
}
-static int orion_mdio_read(struct mii_bus *bus, int mii_id,
- int regnum)
+static int orion_mdio_smi_is_done(struct orion_mdio_dev *dev)
+{
+ return !(readl(dev->regs) & MVMDIO_SMI_BUSY);
+}
+
+static const struct orion_mdio_ops orion_mdio_smi_ops = {
+ .is_done = orion_mdio_smi_is_done,
+ .poll_interval_min = MVMDIO_SMI_POLL_INTERVAL_MIN,
+ .poll_interval_max = MVMDIO_SMI_POLL_INTERVAL_MAX,
+};
+
+static int orion_mdio_smi_read(struct mii_bus *bus, int mii_id,
+ int regnum)
{
struct orion_mdio_dev *dev = bus->priv;
u32 val;
int ret;
- mutex_lock(&dev->lock);
+ if (regnum & MII_ADDR_C45)
+ return -EOPNOTSUPP;
- ret = orion_mdio_wait_ready(bus);
+ ret = orion_mdio_wait_ready(&orion_mdio_smi_ops, bus);
if (ret < 0)
- goto out;
+ return ret;
writel(((mii_id << MVMDIO_SMI_PHY_ADDR_SHIFT) |
(regnum << MVMDIO_SMI_PHY_REG_SHIFT) |
MVMDIO_SMI_READ_OPERATION),
dev->regs);
- ret = orion_mdio_wait_ready(bus);
+ ret = orion_mdio_wait_ready(&orion_mdio_smi_ops, bus);
if (ret < 0)
- goto out;
+ return ret;
val = readl(dev->regs);
if (!(val & MVMDIO_SMI_READ_VALID)) {
dev_err(bus->parent, "SMI bus read not valid\n");
- ret = -ENODEV;
- goto out;
+ return -ENODEV;
}
- ret = val & 0xFFFF;
-out:
- mutex_unlock(&dev->lock);
- return ret;
+ return val & GENMASK(15, 0);
}
-static int orion_mdio_write(struct mii_bus *bus, int mii_id,
- int regnum, u16 value)
+static int orion_mdio_smi_write(struct mii_bus *bus, int mii_id,
+ int regnum, u16 value)
{
struct orion_mdio_dev *dev = bus->priv;
int ret;
- mutex_lock(&dev->lock);
+ if (regnum & MII_ADDR_C45)
+ return -EOPNOTSUPP;
- ret = orion_mdio_wait_ready(bus);
+ ret = orion_mdio_wait_ready(&orion_mdio_smi_ops, bus);
if (ret < 0)
- goto out;
+ return ret;
writel(((mii_id << MVMDIO_SMI_PHY_ADDR_SHIFT) |
(regnum << MVMDIO_SMI_PHY_REG_SHIFT) |
@@ -162,9 +188,74 @@ static int orion_mdio_write(struct mii_bus *bus, int mii_id,
(value << MVMDIO_SMI_DATA_SHIFT)),
dev->regs);
-out:
- mutex_unlock(&dev->lock);
- return ret;
+ return 0;
+}
+
+static int orion_mdio_xsmi_is_done(struct orion_mdio_dev *dev)
+{
+ return !(readl(dev->regs + MVMDIO_XSMI_MGNT_REG) & MVMDIO_XSMI_BUSY);
+}
+
+static const struct orion_mdio_ops orion_mdio_xsmi_ops = {
+ .is_done = orion_mdio_xsmi_is_done,
+ .poll_interval_min = MVMDIO_XSMI_POLL_INTERVAL_MIN,
+ .poll_interval_max = MVMDIO_XSMI_POLL_INTERVAL_MAX,
+};
+
+static int orion_mdio_xsmi_read(struct mii_bus *bus, int mii_id,
+ int regnum)
+{
+ struct orion_mdio_dev *dev = bus->priv;
+ u16 dev_addr = (regnum >> 16) & GENMASK(4, 0);
+ int ret;
+
+ if (!(regnum & MII_ADDR_C45))
+ return -EOPNOTSUPP;
+
+ ret = orion_mdio_wait_ready(&orion_mdio_xsmi_ops, bus);
+ if (ret < 0)
+ return ret;
+
+ writel(regnum & GENMASK(15, 0), dev->regs + MVMDIO_XSMI_ADDR_REG);
+ writel((mii_id << MVMDIO_XSMI_PHYADDR_SHIFT) |
+ (dev_addr << MVMDIO_XSMI_DEVADDR_SHIFT) |
+ MVMDIO_XSMI_READ_OPERATION,
+ dev->regs + MVMDIO_XSMI_MGNT_REG);
+
+ ret = orion_mdio_wait_ready(&orion_mdio_xsmi_ops, bus);
+ if (ret < 0)
+ return ret;
+
+ if (!(readl(dev->regs + MVMDIO_XSMI_MGNT_REG) &
+ MVMDIO_XSMI_READ_VALID)) {
+ dev_err(bus->parent, "XSMI bus read not valid\n");
+ return -ENODEV;
+ }
+
+ return readl(dev->regs + MVMDIO_XSMI_MGNT_REG) & GENMASK(15, 0);
+}
+
+static int orion_mdio_xsmi_write(struct mii_bus *bus, int mii_id,
+ int regnum, u16 value)
+{
+ struct orion_mdio_dev *dev = bus->priv;
+ u16 dev_addr = (regnum >> 16) & GENMASK(4, 0);
+ int ret;
+
+ if (!(regnum & MII_ADDR_C45))
+ return -EOPNOTSUPP;
+
+ ret = orion_mdio_wait_ready(&orion_mdio_xsmi_ops, bus);
+ if (ret < 0)
+ return ret;
+
+ writel(regnum & GENMASK(15, 0), dev->regs + MVMDIO_XSMI_ADDR_REG);
+ writel((mii_id << MVMDIO_XSMI_PHYADDR_SHIFT) |
+ (dev_addr << MVMDIO_XSMI_DEVADDR_SHIFT) |
+ MVMDIO_XSMI_WRITE_OPERATION | value,
+ dev->regs + MVMDIO_XSMI_MGNT_REG);
+
+ return 0;
}
static irqreturn_t orion_mdio_err_irq(int irq, void *dev_id)
@@ -184,11 +275,14 @@ static irqreturn_t orion_mdio_err_irq(int irq, void *dev_id)
static int orion_mdio_probe(struct platform_device *pdev)
{
+ enum orion_mdio_bus_type type;
struct resource *r;
struct mii_bus *bus;
struct orion_mdio_dev *dev;
int i, ret;
+ type = (enum orion_mdio_bus_type)of_device_get_match_data(&pdev->dev);
+
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r) {
dev_err(&pdev->dev, "No SMI register address given\n");
@@ -200,9 +294,18 @@ static int orion_mdio_probe(struct platform_device *pdev)
if (!bus)
return -ENOMEM;
+ switch (type) {
+ case BUS_TYPE_SMI:
+ bus->read = orion_mdio_smi_read;
+ bus->write = orion_mdio_smi_write;
+ break;
+ case BUS_TYPE_XSMI:
+ bus->read = orion_mdio_xsmi_read;
+ bus->write = orion_mdio_xsmi_write;
+ break;
+ }
+
bus->name = "orion_mdio_bus";
- bus->read = orion_mdio_read;
- bus->write = orion_mdio_write;
snprintf(bus->id, MII_BUS_ID_SIZE, "%s-mii",
dev_name(&pdev->dev));
bus->parent = &pdev->dev;
@@ -244,8 +347,6 @@ static int orion_mdio_probe(struct platform_device *pdev)
return -EPROBE_DEFER;
}
- mutex_init(&dev->lock);
-
if (pdev->dev.of_node)
ret = of_mdiobus_register(bus, pdev->dev.of_node);
else
@@ -294,7 +395,8 @@ static int orion_mdio_remove(struct platform_device *pdev)
}
static const struct of_device_id orion_mdio_match[] = {
- { .compatible = "marvell,orion-mdio" },
+ { .compatible = "marvell,orion-mdio", .data = (void *)BUS_TYPE_SMI },
+ { .compatible = "marvell,xmdio", .data = (void *)BUS_TYPE_XSMI },
{ }
};
MODULE_DEVICE_TABLE(of, orion_mdio_match);