From: Girish K S <ks.giri@xxxxxxxxxxx>
This patch adds support for wake up on magic frame arrival.
Also remote wake up on all other packets (unicast, multicast
broadcast) is supported.
Signed-off-by: Girish K S <ks.giri@xxxxxxxxxxx>
Signed-off-by: Byungho An <bh74.an@xxxxxxxxxxx>
---
drivers/net/ethernet/samsung/xgmac_common.h | 15 ++++++
drivers/net/ethernet/samsung/xgmac_core.c | 29 ++++++++++
drivers/net/ethernet/samsung/xgmac_ethtool.c | 47 ++++++++++++++++
drivers/net/ethernet/samsung/xgmac_main.c | 71 +++++++++++++++++++++++++
drivers/net/ethernet/samsung/xgmac_mtl.c | 43 ++++++++++++++-
drivers/net/ethernet/samsung/xgmac_mtl.h | 4 ++
drivers/net/ethernet/samsung/xgmac_platform.c | 4 ++
drivers/net/ethernet/samsung/xgmac_reg.h | 3 ++
8 files changed, 215 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/samsung/xgmac_common.h b/drivers/net/ethernet/samsung/xgmac_common.h
index 349cddc..b7764aa 100644
--- a/drivers/net/ethernet/samsung/xgmac_common.h
+++ b/drivers/net/ethernet/samsung/xgmac_common.h
@@ -124,9 +124,18 @@ struct xgmac_mtl_ops;
#define RX_ENTRY_LPI_MODE 0x40
#define RX_EXIT_LPI_MODE 0x80
+/* PMT mode bits */
+#define PMT_PWRDWN BIT(0)
+#define PMT_MGPKT_EN BIT(1)
+#define PMT_RWKPKT_EN BIT(2)
+#define PMT_GUCAST_EN BIT(9)
+
/* EEE-LPI Interrupt status flag */
#define LPI_INT_STATUS BIT(5)
+/* PMT Interrupt status */
+#define PMT_INT_STATUS BIT(4)
+
/* EEE-LPI Default timer values */
#define LPI_LINK_STATUS_TIMER 0x3E8
#define LPI_MAC_WAIT_TIMER 0x00
@@ -228,6 +237,7 @@ struct xgmac_extra_stats {
unsigned long rx_desc_access_err;
unsigned long rx_buffer_access_err;
unsigned long rx_data_transfer_err;
+ unsigned long pmt_irq_event_n;
/* EEE-LPI stats */
unsigned long tx_lpi_entry_n;
@@ -506,6 +516,11 @@ struct xgmac_priv_data {
int eee_enabled;
int eee_active;
int tx_lpi_timer;
+
+ /* PM-WOL specific members */
+ int wolopts;
+ int wolenabled;
+ int wol_irq;
};
/* Function prototypes */
diff --git a/drivers/net/ethernet/samsung/xgmac_core.c b/drivers/net/ethernet/samsung/xgmac_core.c
index 43d093c..8fa2241 100644
--- a/drivers/net/ethernet/samsung/xgmac_core.c
+++ b/drivers/net/ethernet/samsung/xgmac_core.c
@@ -77,12 +77,41 @@ static int xgmac_core_host_irq_status(void __iomem *ioaddr,
if (unlikely(irq_status & LPI_INT_STATUS))
status |= xgmac_get_lpi_status(ioaddr, irq_status);
+ if (unlikely(irq_status & PMT_INT_STATUS)) {
+ /* clear the PMT bits 5 and 6 by reading the PMT status reg */
+ readl(ioaddr + XGMAC_CORE_PMT_CTL_STATUS_REG);
+ x->pmt_irq_event_n++;
+ }
+
return status;
}
/* Set power management mode (e.g. magic frame) */
static void xgmac_core_pmt(void __iomem *ioaddr, unsigned long mode)
{
+ unsigned int pmt = 0;
+
+ if (mode & WAKE_MAGIC) {
+ pr_debug("GMAC: WOL Magic frame\n");
+ pmt |= PMT_MGPKT_EN;
+ }
+ if (mode & WAKE_UCAST) {
+ pr_debug("GMAC: WOL on global unicast\n");
+ pmt |= PMT_GUCAST_EN;
+ }
+ if (mode & (WAKE_MCAST | WAKE_BCAST)) {
+ pr_debug("GMAC: WOL on any other packet\n");
+ pmt |= PMT_RWKPKT_EN;
+ }
+
+ writel(pmt, ioaddr + XGMAC_CORE_PMT_CTL_STATUS_REG);
+
+ /* Enable power down bit if any of the requested mode is enabled */
+ if (pmt) {
+ writel(XGMAC_RX_ENABLE, ioaddr + XGMAC_CORE_RX_CONFIG_REG);
+ pmt |= PMT_PWRDWN;
+ writel(pmt, ioaddr + XGMAC_CORE_PMT_CTL_STATUS_REG);
+ }
}
/* Set/Get Unicast MAC addresses */
diff --git a/drivers/net/ethernet/samsung/xgmac_ethtool.c b/drivers/net/ethernet/samsung/xgmac_ethtool.c
index 48ef13e..08d0b17 100644
--- a/drivers/net/ethernet/samsung/xgmac_ethtool.c
+++ b/drivers/net/ethernet/samsung/xgmac_ethtool.c
@@ -9,6 +9,7 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
@@ -31,6 +32,7 @@ static const struct xgmac_stats xgmac_gstrings_stats[] = {
XGMAC_STAT(rx_lpi_entry_n),
XGMAC_STAT(rx_lpi_exit_n),
XGMAC_STAT(eee_wakeup_error_n),
+ XGMAC_STAT(pmt_irq_event_n),
};
#define XGMAC_STATS_LEN ARRAY_SIZE(xgmac_gstrings_stats)
@@ -74,9 +76,54 @@ static int xgmac_ethtool_set_eee(struct net_device *dev,
return phy_ethtool_set_eee(priv->phydev, edata);
}
+static void xgmac_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+ struct xgmac_priv_data *priv = netdev_priv(dev);
+
+ wol->wolopts = 0;
+ if (!device_can_wakeup(priv->device)) {
+ dev_err(priv->device, "cannot wakeup device\n");
+ return;
+ }
+
+ if (priv->hw_cap.pmt_magic_frame)
+ wol->supported |= WAKE_MAGIC;
+
+ if (priv->hw_cap.pmt_remote_wake_up)
+ wol->supported |= (WAKE_UCAST | WAKE_MCAST | WAKE_BCAST);
+
+ wol->wolopts = priv->wolopts;
+}
+
+static int xgmac_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
+{
+ struct xgmac_priv_data *priv = netdev_priv(dev);
+
+ if (wol->wolopts & (WAKE_PHY | WAKE_ARP | WAKE_MAGICSECURE))
+ return -EOPNOTSUPP;
+
+ if (!device_can_wakeup(priv->device))
+ return -EOPNOTSUPP;
+
+ if (wol->wolopts) {
+ pr_info("stmmac: wakeup enable\n");
+ device_set_wakeup_enable(priv->device, true);
+ enable_irq_wake(priv->wol_irq);
+ } else {
+ device_set_wakeup_enable(priv->device, false);
+ disable_irq_wake(priv->wol_irq);
+ }
+
+ priv->wolopts = wol->wolopts;
+
+ return 0;
+}
+
static const struct ethtool_ops xgmac_ethtool_ops = {
.get_eee = xgmac_ethtool_get_eee,
.set_eee = xgmac_ethtool_set_eee,
+ .get_wol = xgmac_get_wol,
+ .set_wol = xgmac_set_wol,
};
void xgmac_set_ethtool_ops(struct net_device *netdev)
diff --git a/drivers/net/ethernet/samsung/xgmac_main.c b/drivers/net/ethernet/samsung/xgmac_main.c
index d1f746a..bc6f879 100644
--- a/drivers/net/ethernet/samsung/xgmac_main.c
+++ b/drivers/net/ethernet/samsung/xgmac_main.c
@@ -1162,6 +1162,18 @@ static int xgmac_open(struct net_device *dev)
goto init_error;
}
+ /* Request the Wake IRQ in case of another line is used for WoL */
+ if (priv->wol_irq != dev->irq) {
+ ret = devm_request_irq(priv->device, priv->wol_irq,
+ xgmac_common_interrupt, IRQF_SHARED,
+ dev->name, dev);
+ if (unlikely(ret < 0)) {
+ pr_err("%s: ERROR: allocating the WoL IRQ %d (%d)\n",
+ __func__, priv->wol_irq, ret);
+ goto init_error;
+ }
+ }
+
/* If the LPI irq is different from the mac irq
* register a dedicated handler
*/
@@ -2115,6 +2127,27 @@ static int xgmac_hw_init(struct xgmac_priv_data * const priv)
return 0;
}
+static void xgmac_set_pmt_capabilities(struct xgmac_priv_data *priv)
+{
+ u32 ctrl;
+
+ priv->wolopts = 0;
+
+ ctrl = readl(priv->ioaddr + XGMAC_CORE_PMT_CTL_STATUS_REG);
+ /* Enable maagic packet reception */
+ if (priv->hw_cap.pmt_magic_frame) {
+ priv->wolopts |= WAKE_MAGIC;
+ ctrl |= PMT_MGPKT_EN;
+ }
+ if (priv->hw_cap.pmt_remote_wake_up) {
+ priv->wolopts |= WAKE_UCAST | WAKE_MCAST | WAKE_BCAST;
+ ctrl |= (PMT_RWKPKT_EN | PMT_GUCAST_EN);
+ }
+ writel(ctrl, priv->ioaddr + XGMAC_CORE_PMT_CTL_STATUS_REG);
+
+ device_init_wakeup(priv->device, true);
+}
+
/**
* xgmac_dvr_probe
* @device: device pointer
@@ -2243,6 +2276,7 @@ struct xgmac_priv_data *xgmac_dvr_probe(struct device *device,
goto error_mdio_register;
}
+ xgmac_set_pmt_capabilities(priv);
xgmac_check_ether_addr(priv);
return priv;
@@ -2291,11 +2325,48 @@ int xgmac_dvr_remove(struct net_device *ndev)
#ifdef CONFIG_PM
int xgmac_suspend(struct net_device *ndev)
{
+ struct xgmac_priv_data *priv = netdev_priv(ndev);
+ struct netdev_hw_addr *ha;
+ int queue_num = 0, reg = 0;
+
+ /* Disable TX and wait till all frames flushed out */
+ priv->hw->mac->enable_tx(priv->ioaddr, false);
+ xgmac_tx_all_clean(priv);
+ XGMAC_FOR_EACH_QUEUE(XGMAC_TX_QUEUES, queue_num)
+ priv->hw->mtl->mtl_flush_txqueue(priv->ioaddr, queue_num);
+
+ /* Disable RX and wait till all frames read into memory */
+ priv->hw->mac->enable_rx(priv->ioaddr, false);
+ XGMAC_FOR_EACH_QUEUE(XGMAC_RX_QUEUES, queue_num)
+ priv->hw->mtl->mtl_readout_rxqueue(priv->ioaddr, queue_num);
+
+ /* Enable Power down mode by programming the PMT regs */
+ if (device_may_wakeup(priv->device))
+ priv->hw->mac->pmt(priv->ioaddr, priv->wolopts);
+ else {
+ netdev_for_each_uc_addr(ha, ndev)
+ priv->hw->mac->set_umac_addr(priv->ioaddr, ha->addr,
+ reg++);
+ /* Disable clock in case of PWM is off */
+ clk_disable_unprepare(priv->xgmac_clk);
+ }
+
return 0;
}
int xgmac_resume(struct net_device *ndev)
{
+ struct xgmac_priv_data *priv = netdev_priv(ndev);
+
+ if (device_may_wakeup(priv->device))
+ priv->hw->mac->pmt(priv->ioaddr, 0);
+ else
+ /* enable the clk prevously disabled */
+ clk_prepare_enable(priv->xgmac_clk);
+
+ priv->hw->mac->enable_rx(priv->ioaddr, true);
+ priv->hw->mac->enable_tx(priv->ioaddr, true);
+
return 0;
}
diff --git a/drivers/net/ethernet/samsung/xgmac_mtl.c b/drivers/net/ethernet/samsung/xgmac_mtl.c
index c842aa0..85e0132 100644
--- a/drivers/net/ethernet/samsung/xgmac_mtl.c
+++ b/drivers/net/ethernet/samsung/xgmac_mtl.c
@@ -161,6 +161,45 @@ static void xgmac_mtl_fup_disable(void __iomem *ioaddr, int queue_num)
writel(reg_val, ioaddr + XGMAC_MTL_RXQ_OPMODE_REG(queue_num));
}
+static int xgmac_mtl_flush_txqueue(void __iomem *ioaddr, int queue_num)
+{
+ unsigned long timeout;
+ u32 reg_val;
+
+ timeout = jiffies + msecs_to_jiffies(5);
+
+ reg_val = readl(ioaddr + XGMAC_MTL_TXQ_OPMODE_REG(queue_num));
+ while ((reg_val &
+ (XGMAC_MTL_TXQ_EMPTY_STAT | XGMAC_MTL_TXQ_WRITE_STAT))) {
+ if (time_after(jiffies, timeout)) {
+ pr_err("cannot flush tx queue - timeout");
+ return -ETIMEDOUT;
+ }
+ reg_val = readl(ioaddr + XGMAC_MTL_TXQ_OPMODE_REG(queue_num));
+ }
+
+ return 0;
+}
+
+static int xgmac_mtl_readout_rxqueue(void __iomem *ioaddr, int queue_num)
+{
+ unsigned long timeout;
+ u32 reg_val;
+
+ timeout = jiffies + msecs_to_jiffies(5);
+
+ reg_val = readl(ioaddr + XGMAC_MTL_TXQ_OPMODE_REG(queue_num));
+ while ((reg_val &
+ (XGMAC_MTL_TXQ_EMPTY_STAT | XGMAC_MTL_TXQ_WRITE_STAT))) {
+ if (time_after(jiffies, timeout)) {
+ pr_err("cannot flush tx queue - timeout");
+ return -ETIMEDOUT;
+ }
+ reg_val = readl(ioaddr + XGMAC_MTL_TXQ_OPMODE_REG(queue_num));
+ }
+
+ return 0;
+}
static void xgmac_set_tx_mtl_mode(void __iomem *ioaddr, int queue_num,
int tx_mode)
@@ -229,7 +268,9 @@ static const struct xgmac_mtl_ops mtl_ops = {
.mtl_fep_enable = xgmac_mtl_fep_enable,
.mtl_fep_disable = xgmac_mtl_fep_disable,
.mtl_fup_enable = xgmac_mtl_fup_enable,
- .mtl_fup_disable = xgmac_mtl_fup_disable
+ .mtl_fup_disable = xgmac_mtl_fup_disable,
+ .mtl_flush_txqueue = xgmac_mtl_flush_txqueue,
+ .mtl_readout_rxqueue = xgmac_mtl_readout_rxqueue
};
const struct xgmac_mtl_ops *xgmac_get_mtl_ops(void)
diff --git a/drivers/net/ethernet/samsung/xgmac_mtl.h b/drivers/net/ethernet/samsung/xgmac_mtl.h
index 888fa8f..bacd5e3 100644
--- a/drivers/net/ethernet/samsung/xgmac_mtl.h
+++ b/drivers/net/ethernet/samsung/xgmac_mtl.h
@@ -97,6 +97,10 @@ struct xgmac_mtl_ops {
void (*mtl_fup_enable)(void __iomem *ioaddr, int queue_num);
void (*mtl_fup_disable)(void __iomem *ioaddr, int queue_num);
+
+ int (*mtl_flush_txqueue)(void __iomem *ioaddr, int queue_num);
+
+ int (*mtl_readout_rxqueue)(void __iomem *ioaddr, int queue_num);
};
const struct xgmac_mtl_ops *xgmac_get_mtl_ops(void);
diff --git a/drivers/net/ethernet/samsung/xgmac_platform.c b/drivers/net/ethernet/samsung/xgmac_platform.c
index e988e38..d0cf6cf 100644
--- a/drivers/net/ethernet/samsung/xgmac_platform.c
+++ b/drivers/net/ethernet/samsung/xgmac_platform.c
@@ -170,6 +170,10 @@ static int xgmac_platform_probe(struct platform_device *pdev)
if (priv->lpi_irq == -ENXIO)
priv->lpi_irq = priv->dev->irq;
+ priv->wol_irq = irq_of_parse_and_map(dev->of_node, loop++);
+ if (priv->wol_irq == -ENXIO)
+ priv->wol_irq = priv->dev->irq;
+
platform_set_drvdata(pdev, priv->dev);
pr_debug("XGMAC platform driver registration completed");
diff --git a/drivers/net/ethernet/samsung/xgmac_reg.h b/drivers/net/ethernet/samsung/xgmac_reg.h
index 87fbff0..0b0d927 100644
--- a/drivers/net/ethernet/samsung/xgmac_reg.h
+++ b/drivers/net/ethernet/samsung/xgmac_reg.h
@@ -257,6 +257,9 @@
#define XGMAC_MTL_SFMODE BIT(1)
#define XGMAC_MTL_FIFO_LSHIFT 16
#define XGMAC_MTL_ENABLE_QUEUE 0x00000008
+#define XGMAC_MTL_TXQ_EMPTY_STAT BIT(4)
+#define XGMAC_MTL_TXQ_WRITE_STAT BIT(3)
+
#define XGMAC_MTL_TXQ_UNDERFLOW_REG(qnum) \
(XGMAC_MTL_TC_TXBASE_REG + (qnum * 0x80) + 0x04)
#define XGMAC_MTL_TXQ_DEBUG_REG(qnum) \
--
1.7.10.4
--
To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
