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Diffstat (limited to 'drivers/net/ethernet/arc')
-rw-r--r--drivers/net/ethernet/arc/Kconfig18
-rw-r--r--drivers/net/ethernet/arc/Makefile4
-rw-r--r--drivers/net/ethernet/arc/emac.h8
-rw-r--r--drivers/net/ethernet/arc/emac_arc.c95
-rw-r--r--drivers/net/ethernet/arc/emac_main.c182
-rw-r--r--drivers/net/ethernet/arc/emac_mdio.c7
-rw-r--r--drivers/net/ethernet/arc/emac_rockchip.c229
7 files changed, 438 insertions, 105 deletions
diff --git a/drivers/net/ethernet/arc/Kconfig b/drivers/net/ethernet/arc/Kconfig
index 514c57fd26f1..8e262e2b39b6 100644
--- a/drivers/net/ethernet/arc/Kconfig
+++ b/drivers/net/ethernet/arc/Kconfig
@@ -17,10 +17,14 @@ config NET_VENDOR_ARC
if NET_VENDOR_ARC
-config ARC_EMAC
- tristate "ARC EMAC support"
+config ARC_EMAC_CORE
+ tristate
select MII
select PHYLIB
+
+config ARC_EMAC
+ tristate "ARC EMAC support"
+ select ARC_EMAC_CORE
depends on OF_IRQ
depends on OF_NET
---help---
@@ -28,4 +32,14 @@ config ARC_EMAC
non-standard on-chip ethernet device ARC EMAC 10/100 is used.
Say Y here if you have such a board. If unsure, say N.
+config EMAC_ROCKCHIP
+ tristate "Rockchip EMAC support"
+ select ARC_EMAC_CORE
+ depends on OF_IRQ && OF_NET && REGULATOR
+ ---help---
+ Support for Rockchip RK3066/RK3188 EMAC ethernet controllers.
+ This selects Rockchip SoC glue layer support for the
+ emac device driver. This driver is used for RK3066/RK3188
+ EMAC ethernet controller.
+
endif # NET_VENDOR_ARC
diff --git a/drivers/net/ethernet/arc/Makefile b/drivers/net/ethernet/arc/Makefile
index 00c8657637d5..79108af553fb 100644
--- a/drivers/net/ethernet/arc/Makefile
+++ b/drivers/net/ethernet/arc/Makefile
@@ -3,4 +3,6 @@
#
arc_emac-objs := emac_main.o emac_mdio.o
-obj-$(CONFIG_ARC_EMAC) += arc_emac.o
+obj-$(CONFIG_ARC_EMAC_CORE) += arc_emac.o
+obj-$(CONFIG_ARC_EMAC) += emac_arc.o
+obj-$(CONFIG_EMAC_ROCKCHIP) += emac_rockchip.o
diff --git a/drivers/net/ethernet/arc/emac.h b/drivers/net/ethernet/arc/emac.h
index 36cc9bd07c47..dae1ac300a49 100644
--- a/drivers/net/ethernet/arc/emac.h
+++ b/drivers/net/ethernet/arc/emac.h
@@ -123,6 +123,10 @@ struct buffer_state {
* @speed: PHY's last set speed.
*/
struct arc_emac_priv {
+ const char *drv_name;
+ const char *drv_version;
+ void (*set_mac_speed)(void *priv, unsigned int speed);
+
/* Devices */
struct device *dev;
struct phy_device *phy_dev;
@@ -204,7 +208,9 @@ static inline void arc_reg_clr(struct arc_emac_priv *priv, int reg, int mask)
arc_reg_set(priv, reg, value & ~mask);
}
-int arc_mdio_probe(struct platform_device *pdev, struct arc_emac_priv *priv);
+int arc_mdio_probe(struct arc_emac_priv *priv);
int arc_mdio_remove(struct arc_emac_priv *priv);
+int arc_emac_probe(struct net_device *ndev, int interface);
+int arc_emac_remove(struct net_device *ndev);
#endif /* ARC_EMAC_H */
diff --git a/drivers/net/ethernet/arc/emac_arc.c b/drivers/net/ethernet/arc/emac_arc.c
new file mode 100644
index 000000000000..f9cb99bfb511
--- /dev/null
+++ b/drivers/net/ethernet/arc/emac_arc.c
@@ -0,0 +1,95 @@
+/**
+ * emac_arc.c - ARC EMAC specific glue layer
+ *
+ * Copyright (C) 2014 Romain Perier
+ *
+ * Romain Perier <romain.perier@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/module.h>
+#include <linux/of_net.h>
+#include <linux/platform_device.h>
+
+#include "emac.h"
+
+#define DRV_NAME "emac_arc"
+#define DRV_VERSION "1.0"
+
+static int emac_arc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct net_device *ndev;
+ struct arc_emac_priv *priv;
+ int interface, err;
+
+ if (!dev->of_node)
+ return -ENODEV;
+
+ ndev = alloc_etherdev(sizeof(struct arc_emac_priv));
+ if (!ndev)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, ndev);
+ SET_NETDEV_DEV(ndev, dev);
+
+ priv = netdev_priv(ndev);
+ priv->drv_name = DRV_NAME;
+ priv->drv_version = DRV_VERSION;
+
+ interface = of_get_phy_mode(dev->of_node);
+ if (interface < 0)
+ interface = PHY_INTERFACE_MODE_MII;
+
+ priv->clk = devm_clk_get(dev, "hclk");
+ if (IS_ERR(priv->clk)) {
+ dev_err(dev, "failed to retrieve host clock from device tree\n");
+ err = -EINVAL;
+ goto out_netdev;
+ }
+
+ err = arc_emac_probe(ndev, interface);
+out_netdev:
+ if (err)
+ free_netdev(ndev);
+ return err;
+}
+
+static int emac_arc_remove(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ int err;
+
+ err = arc_emac_remove(ndev);
+ free_netdev(ndev);
+ return err;
+}
+
+static const struct of_device_id emac_arc_dt_ids[] = {
+ { .compatible = "snps,arc-emac" },
+ { /* Sentinel */ }
+};
+
+static struct platform_driver emac_arc_driver = {
+ .probe = emac_arc_probe,
+ .remove = emac_arc_remove,
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = emac_arc_dt_ids,
+ },
+};
+
+module_platform_driver(emac_arc_driver);
+
+MODULE_AUTHOR("Romain Perier <romain.perier@gmail.com>");
+MODULE_DESCRIPTION("ARC EMAC platform driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/ethernet/arc/emac_main.c b/drivers/net/ethernet/arc/emac_main.c
index fe5cfeace6e3..abe1eabc0171 100644
--- a/drivers/net/ethernet/arc/emac_main.c
+++ b/drivers/net/ethernet/arc/emac_main.c
@@ -26,8 +26,17 @@
#include "emac.h"
-#define DRV_NAME "arc_emac"
-#define DRV_VERSION "1.0"
+
+/**
+ * arc_emac_tx_avail - Return the number of available slots in the tx ring.
+ * @priv: Pointer to ARC EMAC private data structure.
+ *
+ * returns: the number of slots available for transmission in tx the ring.
+ */
+static inline int arc_emac_tx_avail(struct arc_emac_priv *priv)
+{
+ return (priv->txbd_dirty + TX_BD_NUM - priv->txbd_curr - 1) % TX_BD_NUM;
+}
/**
* arc_emac_adjust_link - Adjust the PHY link duplex.
@@ -50,6 +59,8 @@ static void arc_emac_adjust_link(struct net_device *ndev)
if (priv->speed != phy_dev->speed) {
priv->speed = phy_dev->speed;
state_changed = 1;
+ if (priv->set_mac_speed)
+ priv->set_mac_speed(priv, priv->speed);
}
if (priv->duplex != phy_dev->duplex) {
@@ -120,8 +131,10 @@ static int arc_emac_set_settings(struct net_device *ndev,
static void arc_emac_get_drvinfo(struct net_device *ndev,
struct ethtool_drvinfo *info)
{
- strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
- strlcpy(info->version, DRV_VERSION, sizeof(info->version));
+ struct arc_emac_priv *priv = netdev_priv(ndev);
+
+ strlcpy(info->driver, priv->drv_name, sizeof(info->driver));
+ strlcpy(info->version, priv->drv_version, sizeof(info->version));
}
static const struct ethtool_ops arc_emac_ethtool_ops = {
@@ -180,10 +193,15 @@ static void arc_emac_tx_clean(struct net_device *ndev)
txbd->info = 0;
*txbd_dirty = (*txbd_dirty + 1) % TX_BD_NUM;
-
- if (netif_queue_stopped(ndev))
- netif_wake_queue(ndev);
}
+
+ /* Ensure that txbd_dirty is visible to tx() before checking
+ * for queue stopped.
+ */
+ smp_mb();
+
+ if (netif_queue_stopped(ndev) && arc_emac_tx_avail(priv))
+ netif_wake_queue(ndev);
}
/**
@@ -298,7 +316,7 @@ static int arc_emac_poll(struct napi_struct *napi, int budget)
work_done = arc_emac_rx(ndev, budget);
if (work_done < budget) {
napi_complete(napi);
- arc_reg_or(priv, R_ENABLE, RXINT_MASK);
+ arc_reg_or(priv, R_ENABLE, RXINT_MASK | TXINT_MASK);
}
return work_done;
@@ -327,9 +345,9 @@ static irqreturn_t arc_emac_intr(int irq, void *dev_instance)
/* Reset all flags except "MDIO complete" */
arc_reg_set(priv, R_STATUS, status);
- if (status & RXINT_MASK) {
+ if (status & (RXINT_MASK | TXINT_MASK)) {
if (likely(napi_schedule_prep(&priv->napi))) {
- arc_reg_clr(priv, R_ENABLE, RXINT_MASK);
+ arc_reg_clr(priv, R_ENABLE, RXINT_MASK | TXINT_MASK);
__napi_schedule(&priv->napi);
}
}
@@ -440,7 +458,7 @@ static int arc_emac_open(struct net_device *ndev)
arc_reg_set(priv, R_TX_RING, (unsigned int)priv->txbd_dma);
/* Enable interrupts */
- arc_reg_set(priv, R_ENABLE, RXINT_MASK | ERR_MASK);
+ arc_reg_set(priv, R_ENABLE, RXINT_MASK | TXINT_MASK | ERR_MASK);
/* Set CONTROL */
arc_reg_set(priv, R_CTRL,
@@ -511,7 +529,7 @@ static int arc_emac_stop(struct net_device *ndev)
netif_stop_queue(ndev);
/* Disable interrupts */
- arc_reg_clr(priv, R_ENABLE, RXINT_MASK | ERR_MASK);
+ arc_reg_clr(priv, R_ENABLE, RXINT_MASK | TXINT_MASK | ERR_MASK);
/* Disable EMAC */
arc_reg_clr(priv, R_CTRL, EN_MASK);
@@ -574,11 +592,9 @@ static int arc_emac_tx(struct sk_buff *skb, struct net_device *ndev)
len = max_t(unsigned int, ETH_ZLEN, skb->len);
- /* EMAC still holds this buffer in its possession.
- * CPU must not modify this buffer descriptor
- */
- if (unlikely((le32_to_cpu(*info) & OWN_MASK) == FOR_EMAC)) {
+ if (unlikely(!arc_emac_tx_avail(priv))) {
netif_stop_queue(ndev);
+ netdev_err(ndev, "BUG! Tx Ring full when queue awake!\n");
return NETDEV_TX_BUSY;
}
@@ -607,12 +623,19 @@ static int arc_emac_tx(struct sk_buff *skb, struct net_device *ndev)
/* Increment index to point to the next BD */
*txbd_curr = (*txbd_curr + 1) % TX_BD_NUM;
- /* Get "info" of the next BD */
- info = &priv->txbd[*txbd_curr].info;
+ /* Ensure that tx_clean() sees the new txbd_curr before
+ * checking the queue status. This prevents an unneeded wake
+ * of the queue in tx_clean().
+ */
+ smp_mb();
- /* Check if if Tx BD ring is full - next BD is still owned by EMAC */
- if (unlikely((le32_to_cpu(*info) & OWN_MASK) == FOR_EMAC))
+ if (!arc_emac_tx_avail(priv)) {
netif_stop_queue(ndev);
+ /* Refresh tx_dirty */
+ smp_mb();
+ if (arc_emac_tx_avail(priv))
+ netif_start_queue(ndev);
+ }
arc_reg_set(priv, R_STATUS, TXPL_MASK);
@@ -671,46 +694,38 @@ static const struct net_device_ops arc_emac_netdev_ops = {
#endif
};
-static int arc_emac_probe(struct platform_device *pdev)
+int arc_emac_probe(struct net_device *ndev, int interface)
{
+ struct device *dev = ndev->dev.parent;
struct resource res_regs;
struct device_node *phy_node;
struct arc_emac_priv *priv;
- struct net_device *ndev;
const char *mac_addr;
unsigned int id, clock_frequency, irq;
int err;
- if (!pdev->dev.of_node)
- return -ENODEV;
/* Get PHY from device tree */
- phy_node = of_parse_phandle(pdev->dev.of_node, "phy", 0);
+ phy_node = of_parse_phandle(dev->of_node, "phy", 0);
if (!phy_node) {
- dev_err(&pdev->dev, "failed to retrieve phy description from device tree\n");
+ dev_err(dev, "failed to retrieve phy description from device tree\n");
return -ENODEV;
}
/* Get EMAC registers base address from device tree */
- err = of_address_to_resource(pdev->dev.of_node, 0, &res_regs);
+ err = of_address_to_resource(dev->of_node, 0, &res_regs);
if (err) {
- dev_err(&pdev->dev, "failed to retrieve registers base from device tree\n");
+ dev_err(dev, "failed to retrieve registers base from device tree\n");
return -ENODEV;
}
/* Get IRQ from device tree */
- irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
+ irq = irq_of_parse_and_map(dev->of_node, 0);
if (!irq) {
- dev_err(&pdev->dev, "failed to retrieve <irq> value from device tree\n");
+ dev_err(dev, "failed to retrieve <irq> value from device tree\n");
return -ENODEV;
}
- ndev = alloc_etherdev(sizeof(struct arc_emac_priv));
- if (!ndev)
- return -ENOMEM;
-
- platform_set_drvdata(pdev, ndev);
- SET_NETDEV_DEV(ndev, &pdev->dev);
ndev->netdev_ops = &arc_emac_netdev_ops;
ndev->ethtool_ops = &arc_emac_ethtool_ops;
@@ -719,60 +734,57 @@ static int arc_emac_probe(struct platform_device *pdev)
ndev->flags &= ~IFF_MULTICAST;
priv = netdev_priv(ndev);
- priv->dev = &pdev->dev;
+ priv->dev = dev;
- priv->regs = devm_ioremap_resource(&pdev->dev, &res_regs);
+ priv->regs = devm_ioremap_resource(dev, &res_regs);
if (IS_ERR(priv->regs)) {
- err = PTR_ERR(priv->regs);
- goto out_netdev;
+ return PTR_ERR(priv->regs);
}
- dev_dbg(&pdev->dev, "Registers base address is 0x%p\n", priv->regs);
+ dev_dbg(dev, "Registers base address is 0x%p\n", priv->regs);
- priv->clk = of_clk_get(pdev->dev.of_node, 0);
- if (IS_ERR(priv->clk)) {
- /* Get CPU clock frequency from device tree */
- if (of_property_read_u32(pdev->dev.of_node, "clock-frequency",
- &clock_frequency)) {
- dev_err(&pdev->dev, "failed to retrieve <clock-frequency> from device tree\n");
- err = -EINVAL;
- goto out_netdev;
- }
- } else {
+ if (priv->clk) {
err = clk_prepare_enable(priv->clk);
if (err) {
- dev_err(&pdev->dev, "failed to enable clock\n");
- goto out_clkget;
+ dev_err(dev, "failed to enable clock\n");
+ return err;
}
clock_frequency = clk_get_rate(priv->clk);
+ } else {
+ /* Get CPU clock frequency from device tree */
+ if (of_property_read_u32(dev->of_node, "clock-frequency",
+ &clock_frequency)) {
+ dev_err(dev, "failed to retrieve <clock-frequency> from device tree\n");
+ return -EINVAL;
+ }
}
id = arc_reg_get(priv, R_ID);
/* Check for EMAC revision 5 or 7, magic number */
if (!(id == 0x0005fd02 || id == 0x0007fd02)) {
- dev_err(&pdev->dev, "ARC EMAC not detected, id=0x%x\n", id);
+ dev_err(dev, "ARC EMAC not detected, id=0x%x\n", id);
err = -ENODEV;
goto out_clken;
}
- dev_info(&pdev->dev, "ARC EMAC detected with id: 0x%x\n", id);
+ dev_info(dev, "ARC EMAC detected with id: 0x%x\n", id);
/* Set poll rate so that it polls every 1 ms */
arc_reg_set(priv, R_POLLRATE, clock_frequency / 1000000);
ndev->irq = irq;
- dev_info(&pdev->dev, "IRQ is %d\n", ndev->irq);
+ dev_info(dev, "IRQ is %d\n", ndev->irq);
/* Register interrupt handler for device */
- err = devm_request_irq(&pdev->dev, ndev->irq, arc_emac_intr, 0,
+ err = devm_request_irq(dev, ndev->irq, arc_emac_intr, 0,
ndev->name, ndev);
if (err) {
- dev_err(&pdev->dev, "could not allocate IRQ\n");
+ dev_err(dev, "could not allocate IRQ\n");
goto out_clken;
}
/* Get MAC address from device tree */
- mac_addr = of_get_mac_address(pdev->dev.of_node);
+ mac_addr = of_get_mac_address(dev->of_node);
if (mac_addr)
memcpy(ndev->dev_addr, mac_addr, ETH_ALEN);
@@ -780,14 +792,14 @@ static int arc_emac_probe(struct platform_device *pdev)
eth_hw_addr_random(ndev);
arc_emac_set_address_internal(ndev);
- dev_info(&pdev->dev, "MAC address is now %pM\n", ndev->dev_addr);
+ dev_info(dev, "MAC address is now %pM\n", ndev->dev_addr);
/* Do 1 allocation instead of 2 separate ones for Rx and Tx BD rings */
- priv->rxbd = dmam_alloc_coherent(&pdev->dev, RX_RING_SZ + TX_RING_SZ,
+ priv->rxbd = dmam_alloc_coherent(dev, RX_RING_SZ + TX_RING_SZ,
&priv->rxbd_dma, GFP_KERNEL);
if (!priv->rxbd) {
- dev_err(&pdev->dev, "failed to allocate data buffers\n");
+ dev_err(dev, "failed to allocate data buffers\n");
err = -ENOMEM;
goto out_clken;
}
@@ -795,31 +807,31 @@ static int arc_emac_probe(struct platform_device *pdev)
priv->txbd = priv->rxbd + RX_BD_NUM;
priv->txbd_dma = priv->rxbd_dma + RX_RING_SZ;
- dev_dbg(&pdev->dev, "EMAC Device addr: Rx Ring [0x%x], Tx Ring[%x]\n",
+ dev_dbg(dev, "EMAC Device addr: Rx Ring [0x%x], Tx Ring[%x]\n",
(unsigned int)priv->rxbd_dma, (unsigned int)priv->txbd_dma);
- err = arc_mdio_probe(pdev, priv);
+ err = arc_mdio_probe(priv);
if (err) {
- dev_err(&pdev->dev, "failed to probe MII bus\n");
+ dev_err(dev, "failed to probe MII bus\n");
goto out_clken;
}
priv->phy_dev = of_phy_connect(ndev, phy_node, arc_emac_adjust_link, 0,
- PHY_INTERFACE_MODE_MII);
+ interface);
if (!priv->phy_dev) {
- dev_err(&pdev->dev, "of_phy_connect() failed\n");
+ dev_err(dev, "of_phy_connect() failed\n");
err = -ENODEV;
goto out_mdio;
}
- dev_info(&pdev->dev, "connected to %s phy with id 0x%x\n",
+ dev_info(dev, "connected to %s phy with id 0x%x\n",
priv->phy_dev->drv->name, priv->phy_dev->phy_id);
netif_napi_add(ndev, &priv->napi, arc_emac_poll, ARC_EMAC_NAPI_WEIGHT);
err = register_netdev(ndev);
if (err) {
- dev_err(&pdev->dev, "failed to register network device\n");
+ dev_err(dev, "failed to register network device\n");
goto out_netif_api;
}
@@ -832,19 +844,14 @@ out_netif_api:
out_mdio:
arc_mdio_remove(priv);
out_clken:
- if (!IS_ERR(priv->clk))
+ if (priv->clk)
clk_disable_unprepare(priv->clk);
-out_clkget:
- if (!IS_ERR(priv->clk))
- clk_put(priv->clk);
-out_netdev:
- free_netdev(ndev);
return err;
}
+EXPORT_SYMBOL_GPL(arc_emac_probe);
-static int arc_emac_remove(struct platform_device *pdev)
+int arc_emac_remove(struct net_device *ndev)
{
- struct net_device *ndev = platform_get_drvdata(pdev);
struct arc_emac_priv *priv = netdev_priv(ndev);
phy_disconnect(priv->phy_dev);
@@ -855,31 +862,12 @@ static int arc_emac_remove(struct platform_device *pdev)
if (!IS_ERR(priv->clk)) {
clk_disable_unprepare(priv->clk);
- clk_put(priv->clk);
}
- free_netdev(ndev);
return 0;
}
-
-static const struct of_device_id arc_emac_dt_ids[] = {
- { .compatible = "snps,arc-emac" },
- { /* Sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, arc_emac_dt_ids);
-
-static struct platform_driver arc_emac_driver = {
- .probe = arc_emac_probe,
- .remove = arc_emac_remove,
- .driver = {
- .name = DRV_NAME,
- .owner = THIS_MODULE,
- .of_match_table = arc_emac_dt_ids,
- },
-};
-
-module_platform_driver(arc_emac_driver);
+EXPORT_SYMBOL_GPL(arc_emac_remove);
MODULE_AUTHOR("Alexey Brodkin <abrodkin@synopsys.com>");
MODULE_DESCRIPTION("ARC EMAC driver");
diff --git a/drivers/net/ethernet/arc/emac_mdio.c b/drivers/net/ethernet/arc/emac_mdio.c
index 26ba2423f33a..d5ee986936da 100644
--- a/drivers/net/ethernet/arc/emac_mdio.c
+++ b/drivers/net/ethernet/arc/emac_mdio.c
@@ -100,7 +100,6 @@ static int arc_mdio_write(struct mii_bus *bus, int phy_addr,
/**
* arc_mdio_probe - MDIO probe function.
- * @pdev: Pointer to platform device.
* @priv: Pointer to ARC EMAC private data structure.
*
* returns: 0 on success, -ENOMEM when mdiobus_alloc
@@ -108,7 +107,7 @@ static int arc_mdio_write(struct mii_bus *bus, int phy_addr,
*
* Sets up and registers the MDIO interface.
*/
-int arc_mdio_probe(struct platform_device *pdev, struct arc_emac_priv *priv)
+int arc_mdio_probe(struct arc_emac_priv *priv)
{
struct mii_bus *bus;
int error;
@@ -124,9 +123,9 @@ int arc_mdio_probe(struct platform_device *pdev, struct arc_emac_priv *priv)
bus->read = &arc_mdio_read;
bus->write = &arc_mdio_write;
- snprintf(bus->id, MII_BUS_ID_SIZE, "%s", pdev->name);
+ snprintf(bus->id, MII_BUS_ID_SIZE, "%s", bus->name);
- error = of_mdiobus_register(bus, pdev->dev.of_node);
+ error = of_mdiobus_register(bus, priv->dev->of_node);
if (error) {
dev_err(priv->dev, "cannot register MDIO bus %s\n", bus->name);
mdiobus_free(bus);
diff --git a/drivers/net/ethernet/arc/emac_rockchip.c b/drivers/net/ethernet/arc/emac_rockchip.c
new file mode 100644
index 000000000000..c31c7407b753
--- /dev/null
+++ b/drivers/net/ethernet/arc/emac_rockchip.c
@@ -0,0 +1,229 @@
+/**
+ * emac-rockchip.c - Rockchip EMAC specific glue layer
+ *
+ * Copyright (C) 2014 Romain Perier <romain.perier@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_net.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#include "emac.h"
+
+#define DRV_NAME "rockchip_emac"
+#define DRV_VERSION "1.0"
+
+#define GRF_MODE_MII (1UL << 0)
+#define GRF_MODE_RMII (0UL << 0)
+#define GRF_SPEED_10M (0UL << 1)
+#define GRF_SPEED_100M (1UL << 1)
+#define GRF_SPEED_ENABLE_BIT (1UL << 17)
+#define GRF_MODE_ENABLE_BIT (1UL << 16)
+
+struct emac_rockchip_soc_data {
+ int grf_offset;
+};
+
+struct rockchip_priv_data {
+ struct arc_emac_priv emac;
+ struct regmap *grf;
+ const struct emac_rockchip_soc_data *soc_data;
+ struct regulator *regulator;
+ struct clk *refclk;
+};
+
+static void emac_rockchip_set_mac_speed(void *priv, unsigned int speed)
+{
+ struct rockchip_priv_data *emac = priv;
+ u32 data;
+ int err = 0;
+
+ /* write-enable bits */
+ data = GRF_SPEED_ENABLE_BIT;
+
+ switch(speed) {
+ case 10:
+ data |= GRF_SPEED_10M;
+ break;
+ case 100:
+ data |= GRF_SPEED_100M;
+ break;
+ default:
+ pr_err("speed %u not supported\n", speed);
+ return;
+ }
+
+ err = regmap_write(emac->grf, emac->soc_data->grf_offset, data);
+ if (err)
+ pr_err("unable to apply speed %u to grf (%d)\n", speed, err);
+}
+
+static const struct emac_rockchip_soc_data emac_rockchip_dt_data[] = {
+ { .grf_offset = 0x154 }, /* rk3066 */
+ { .grf_offset = 0x0a4 }, /* rk3188 */
+};
+
+static const struct of_device_id emac_rockchip_dt_ids[] = {
+ { .compatible = "rockchip,rk3066-emac", .data = &emac_rockchip_dt_data[0] },
+ { .compatible = "rockchip,rk3188-emac", .data = &emac_rockchip_dt_data[1] },
+ { /* Sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, emac_rockchip_dt_ids);
+
+static int emac_rockchip_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct net_device *ndev;
+ struct rockchip_priv_data *priv;
+ const struct of_device_id *match;
+ u32 data;
+ int err, interface;
+
+ if (!pdev->dev.of_node)
+ return -ENODEV;
+
+ ndev = alloc_etherdev(sizeof(struct rockchip_priv_data));
+ if (!ndev)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, ndev);
+ SET_NETDEV_DEV(ndev, dev);
+
+ priv = netdev_priv(ndev);
+ priv->emac.drv_name = DRV_NAME;
+ priv->emac.drv_version = DRV_VERSION;
+ priv->emac.set_mac_speed = emac_rockchip_set_mac_speed;
+
+ interface = of_get_phy_mode(dev->of_node);
+
+ /* RK3066 and RK3188 SoCs only support RMII */
+ if (interface != PHY_INTERFACE_MODE_RMII) {
+ dev_err(dev, "unsupported phy interface mode %d\n", interface);
+ err = -ENOTSUPP;
+ goto out_netdev;
+ }
+
+ priv->grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,grf");
+ if (IS_ERR(priv->grf)) {
+ dev_err(dev, "failed to retrieve global register file (%ld)\n", PTR_ERR(priv->grf));
+ err = PTR_ERR(priv->grf);
+ goto out_netdev;
+ }
+
+ match = of_match_node(emac_rockchip_dt_ids, dev->of_node);
+ priv->soc_data = match->data;
+
+ priv->emac.clk = devm_clk_get(dev, "hclk");
+ if (IS_ERR(priv->emac.clk)) {
+ dev_err(dev, "failed to retrieve host clock (%ld)\n", PTR_ERR(priv->emac.clk));
+ err = PTR_ERR(priv->emac.clk);
+ goto out_netdev;
+ }
+
+ priv->refclk = devm_clk_get(dev, "macref");
+ if (IS_ERR(priv->refclk)) {
+ dev_err(dev, "failed to retrieve reference clock (%ld)\n", PTR_ERR(priv->refclk));
+ err = PTR_ERR(priv->refclk);
+ goto out_netdev;
+ }
+
+ err = clk_prepare_enable(priv->refclk);
+ if (err) {
+ dev_err(dev, "failed to enable reference clock (%d)\n", err);
+ goto out_netdev;
+ }
+
+ /* Optional regulator for PHY */
+ priv->regulator = devm_regulator_get_optional(dev, "phy");
+ if (IS_ERR(priv->regulator)) {
+ if (PTR_ERR(priv->regulator) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_err(dev, "no regulator found\n");
+ priv->regulator = NULL;
+ }
+
+ if (priv->regulator) {
+ err = regulator_enable(priv->regulator);
+ if (err) {
+ dev_err(dev, "failed to enable phy-supply (%d)\n", err);
+ goto out_clk_disable;
+ }
+ }
+
+ err = arc_emac_probe(ndev, interface);
+ if (err)
+ goto out_regulator_disable;
+
+ /* write-enable bits */
+ data = GRF_MODE_ENABLE_BIT | GRF_SPEED_ENABLE_BIT;
+
+ data |= GRF_SPEED_100M;
+ data |= GRF_MODE_RMII;
+
+ err = regmap_write(priv->grf, priv->soc_data->grf_offset, data);
+ if (err) {
+ dev_err(dev, "unable to apply initial settings to grf (%d)\n", err);
+ goto out_regulator_disable;
+ }
+
+ /* RMII interface needs always a rate of 50MHz */
+ err = clk_set_rate(priv->refclk, 50000000);
+ if (err)
+ dev_err(dev, "failed to change reference clock rate (%d)\n", err);
+ return 0;
+
+out_regulator_disable:
+ if (priv->regulator)
+ regulator_disable(priv->regulator);
+out_clk_disable:
+ clk_disable_unprepare(priv->refclk);
+out_netdev:
+ free_netdev(ndev);
+ return err;
+}
+
+static int emac_rockchip_remove(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct rockchip_priv_data *priv = netdev_priv(ndev);
+ int err;
+
+ err = arc_emac_remove(ndev);
+
+ clk_disable_unprepare(priv->refclk);
+
+ if (priv->regulator)
+ regulator_disable(priv->regulator);
+
+ free_netdev(ndev);
+ return err;
+}
+
+static struct platform_driver emac_rockchip_driver = {
+ .probe = emac_rockchip_probe,
+ .remove = emac_rockchip_remove,
+ .driver = {
+ .name = DRV_NAME,
+ .of_match_table = emac_rockchip_dt_ids,
+ },
+};
+
+module_platform_driver(emac_rockchip_driver);
+
+MODULE_AUTHOR("Romain Perier <romain.perier@gmail.com>");
+MODULE_DESCRIPTION("Rockchip EMAC platform driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-01 12:46:02 +0300