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path: root/drivers/net/ethernet/smsc/smsc911x.c
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Diffstat (limited to 'drivers/net/ethernet/smsc/smsc911x.c')
-rw-r--r--drivers/net/ethernet/smsc/smsc911x.c203
1 files changed, 192 insertions, 11 deletions
diff --git a/drivers/net/ethernet/smsc/smsc911x.c b/drivers/net/ethernet/smsc/smsc911x.c
index 8843071fe987..9d0b8ced0234 100644
--- a/drivers/net/ethernet/smsc/smsc911x.c
+++ b/drivers/net/ethernet/smsc/smsc911x.c
@@ -44,6 +44,7 @@
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/bug.h>
@@ -88,6 +89,8 @@ struct smsc911x_ops {
unsigned int *buf, unsigned int wordcount);
};
+#define SMSC911X_NUM_SUPPLIES 2
+
struct smsc911x_data {
void __iomem *ioaddr;
@@ -138,6 +141,9 @@ struct smsc911x_data {
/* register access functions */
const struct smsc911x_ops *ops;
+
+ /* regulators */
+ struct regulator_bulk_data supplies[SMSC911X_NUM_SUPPLIES];
};
/* Easy access to information */
@@ -362,6 +368,76 @@ out:
spin_unlock_irqrestore(&pdata->dev_lock, flags);
}
+/*
+ * enable resources, currently just regulators.
+ */
+static int smsc911x_enable_resources(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct smsc911x_data *pdata = netdev_priv(ndev);
+ int ret = 0;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(pdata->supplies),
+ pdata->supplies);
+ if (ret)
+ netdev_err(ndev, "failed to enable regulators %d\n",
+ ret);
+ return ret;
+}
+
+/*
+ * disable resources, currently just regulators.
+ */
+static int smsc911x_disable_resources(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct smsc911x_data *pdata = netdev_priv(ndev);
+ int ret = 0;
+
+ ret = regulator_bulk_disable(ARRAY_SIZE(pdata->supplies),
+ pdata->supplies);
+ return ret;
+}
+
+/*
+ * Request resources, currently just regulators.
+ *
+ * The SMSC911x has two power pins: vddvario and vdd33a, in designs where
+ * these are not always-on we need to request regulators to be turned on
+ * before we can try to access the device registers.
+ */
+static int smsc911x_request_resources(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct smsc911x_data *pdata = netdev_priv(ndev);
+ int ret = 0;
+
+ /* Request regulators */
+ pdata->supplies[0].supply = "vdd33a";
+ pdata->supplies[1].supply = "vddvario";
+ ret = regulator_bulk_get(&pdev->dev,
+ ARRAY_SIZE(pdata->supplies),
+ pdata->supplies);
+ if (ret)
+ netdev_err(ndev, "couldn't get regulators %d\n",
+ ret);
+ return ret;
+}
+
+/*
+ * Free resources, currently just regulators.
+ *
+ */
+static void smsc911x_free_resources(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct smsc911x_data *pdata = netdev_priv(ndev);
+
+ /* Free regulators */
+ regulator_bulk_free(ARRAY_SIZE(pdata->supplies),
+ pdata->supplies);
+}
+
/* waits for MAC not busy, with timeout. Only called by smsc911x_mac_read
* and smsc911x_mac_write, so assumes mac_lock is held */
static int smsc911x_mac_complete(struct smsc911x_data *pdata)
@@ -1243,10 +1319,92 @@ static void smsc911x_rx_multicast_update_workaround(struct smsc911x_data *pdata)
spin_unlock(&pdata->mac_lock);
}
+static int smsc911x_phy_disable_energy_detect(struct smsc911x_data *pdata)
+{
+ int rc = 0;
+
+ if (!pdata->phy_dev)
+ return rc;
+
+ rc = phy_read(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS);
+
+ if (rc < 0) {
+ SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
+ return rc;
+ }
+
+ /*
+ * If energy is detected the PHY is already awake so is not necessary
+ * to disable the energy detect power-down mode.
+ */
+ if ((rc & MII_LAN83C185_EDPWRDOWN) &&
+ !(rc & MII_LAN83C185_ENERGYON)) {
+ /* Disable energy detect mode for this SMSC Transceivers */
+ rc = phy_write(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS,
+ rc & (~MII_LAN83C185_EDPWRDOWN));
+
+ if (rc < 0) {
+ SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
+ return rc;
+ }
+
+ mdelay(1);
+ }
+
+ return 0;
+}
+
+static int smsc911x_phy_enable_energy_detect(struct smsc911x_data *pdata)
+{
+ int rc = 0;
+
+ if (!pdata->phy_dev)
+ return rc;
+
+ rc = phy_read(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS);
+
+ if (rc < 0) {
+ SMSC_WARN(pdata, drv, "Failed reading PHY control reg");
+ return rc;
+ }
+
+ /* Only enable if energy detect mode is already disabled */
+ if (!(rc & MII_LAN83C185_EDPWRDOWN)) {
+ mdelay(100);
+ /* Enable energy detect mode for this SMSC Transceivers */
+ rc = phy_write(pdata->phy_dev, MII_LAN83C185_CTRL_STATUS,
+ rc | MII_LAN83C185_EDPWRDOWN);
+
+ if (rc < 0) {
+ SMSC_WARN(pdata, drv, "Failed writing PHY control reg");
+ return rc;
+ }
+
+ mdelay(1);
+ }
+ return 0;
+}
+
static int smsc911x_soft_reset(struct smsc911x_data *pdata)
{
unsigned int timeout;
unsigned int temp;
+ int ret;
+
+ /*
+ * LAN9210/LAN9211/LAN9220/LAN9221 chips have an internal PHY that
+ * are initialized in a Energy Detect Power-Down mode that prevents
+ * the MAC chip to be software reseted. So we have to wakeup the PHY
+ * before.
+ */
+ if (pdata->generation == 4) {
+ ret = smsc911x_phy_disable_energy_detect(pdata);
+
+ if (ret) {
+ SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
+ return ret;
+ }
+ }
/* Reset the LAN911x */
smsc911x_reg_write(pdata, HW_CFG, HW_CFG_SRST_);
@@ -1260,6 +1418,16 @@ static int smsc911x_soft_reset(struct smsc911x_data *pdata)
SMSC_WARN(pdata, drv, "Failed to complete reset");
return -EIO;
}
+
+ if (pdata->generation == 4) {
+ ret = smsc911x_phy_enable_energy_detect(pdata);
+
+ if (ret) {
+ SMSC_WARN(pdata, drv, "Failed to wakeup the PHY chip");
+ return ret;
+ }
+ }
+
return 0;
}
@@ -2092,6 +2260,9 @@ static int __devexit smsc911x_drv_remove(struct platform_device *pdev)
iounmap(pdata->ioaddr);
+ (void)smsc911x_disable_resources(pdev);
+ smsc911x_free_resources(pdev);
+
free_netdev(dev);
return 0;
@@ -2218,10 +2389,20 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
pdata->dev = dev;
pdata->msg_enable = ((1 << debug) - 1);
+ platform_set_drvdata(pdev, dev);
+
+ retval = smsc911x_request_resources(pdev);
+ if (retval)
+ goto out_return_resources;
+
+ retval = smsc911x_enable_resources(pdev);
+ if (retval)
+ goto out_disable_resources;
+
if (pdata->ioaddr == NULL) {
SMSC_WARN(pdata, probe, "Error smsc911x base address invalid");
retval = -ENOMEM;
- goto out_free_netdev_2;
+ goto out_disable_resources;
}
retval = smsc911x_probe_config_dt(&pdata->config, np);
@@ -2233,7 +2414,7 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
if (retval) {
SMSC_WARN(pdata, probe, "Error smsc911x config not found");
- goto out_unmap_io_3;
+ goto out_disable_resources;
}
/* assume standard, non-shifted, access to HW registers */
@@ -2244,7 +2425,7 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
retval = smsc911x_init(dev);
if (retval < 0)
- goto out_unmap_io_3;
+ goto out_disable_resources;
/* configure irq polarity and type before connecting isr */
if (pdata->config.irq_polarity == SMSC911X_IRQ_POLARITY_ACTIVE_HIGH)
@@ -2264,15 +2445,13 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
if (retval) {
SMSC_WARN(pdata, probe,
"Unable to claim requested irq: %d", dev->irq);
- goto out_unmap_io_3;
+ goto out_free_irq;
}
- platform_set_drvdata(pdev, dev);
-
retval = register_netdev(dev);
if (retval) {
SMSC_WARN(pdata, probe, "Error %i registering device", retval);
- goto out_unset_drvdata_4;
+ goto out_free_irq;
} else {
SMSC_TRACE(pdata, probe,
"Network interface: \"%s\"", dev->name);
@@ -2321,12 +2500,14 @@ static int __devinit smsc911x_drv_probe(struct platform_device *pdev)
out_unregister_netdev_5:
unregister_netdev(dev);
-out_unset_drvdata_4:
- platform_set_drvdata(pdev, NULL);
+out_free_irq:
free_irq(dev->irq, dev);
-out_unmap_io_3:
+out_disable_resources:
+ (void)smsc911x_disable_resources(pdev);
+out_return_resources:
+ smsc911x_free_resources(pdev);
+ platform_set_drvdata(pdev, NULL);
iounmap(pdata->ioaddr);
-out_free_netdev_2:
free_netdev(dev);
out_release_io_1:
release_mem_region(res->start, resource_size(res));