[PATCH v3 3/4] net: nb8800: Move HW init to ndo_open()
Marc Gonzalez
marc_gonzalez at sigmadesigns.com
Tue Nov 14 02:56:24 PST 2017
Power entire ethernet block down in ndo_stop().
Power it back up in ndo_open() and perform HW init.
Delete nb8800_dma_stop.
Signed-off-by: Marc Gonzalez <marc_gonzalez at sigmadesigns.com>
---
drivers/net/ethernet/aurora/nb8800.c | 146 +++++++++--------------------------
drivers/net/ethernet/aurora/nb8800.h | 4 +-
2 files changed, 40 insertions(+), 110 deletions(-)
diff --git a/drivers/net/ethernet/aurora/nb8800.c b/drivers/net/ethernet/aurora/nb8800.c
index 09b8001e1ecc..b71d8fb80610 100644
--- a/drivers/net/ethernet/aurora/nb8800.c
+++ b/drivers/net/ethernet/aurora/nb8800.c
@@ -40,7 +40,7 @@
#include "nb8800.h"
static void nb8800_tx_done(struct net_device *dev);
-static int nb8800_dma_stop(struct net_device *dev);
+static void nb8800_hw_init(struct net_device *dev);
static inline u8 nb8800_readb(struct nb8800_priv *priv, int reg)
{
@@ -862,61 +862,6 @@ static int nb8800_dma_init(struct net_device *dev)
return -ENOMEM;
}
-static int nb8800_dma_stop(struct net_device *dev)
-{
- struct nb8800_priv *priv = netdev_priv(dev);
- struct nb8800_tx_buf *txb = &priv->tx_bufs[0];
- struct nb8800_tx_desc *txd = &priv->tx_descs[0];
- int retry = 5;
- u32 txcr;
- u32 rxcr;
- int err;
- unsigned int i;
-
- /* wait for tx to finish */
- err = readl_poll_timeout_atomic(priv->base + NB8800_TXC_CR, txcr,
- !(txcr & TCR_EN) &&
- priv->tx_done == priv->tx_next,
- 1000, 1000000);
- if (err)
- return err;
-
- /* The rx DMA only stops if it reaches the end of chain.
- * To make this happen, we set the EOC flag on all rx
- * descriptors, put the device in loopback mode, and send
- * a few dummy frames. The interrupt handler will ignore
- * these since NAPI is disabled and no real frames are in
- * the tx queue.
- */
-
- for (i = 0; i < RX_DESC_COUNT; i++)
- priv->rx_descs[i].desc.config |= DESC_EOC;
-
- txd->desc[0].s_addr =
- txb->dma_desc + offsetof(struct nb8800_tx_desc, buf);
- txd->desc[0].config = DESC_BTS(2) | DESC_DS | DESC_EOF | DESC_EOC | 8;
- memset(txd->buf, 0, sizeof(txd->buf));
-
- nb8800_mac_af(dev, false);
- nb8800_setb(priv, NB8800_MAC_MODE, LOOPBACK_EN);
-
- do {
- nb8800_writel(priv, NB8800_TX_DESC_ADDR, txb->dma_desc);
- wmb();
- nb8800_writel(priv, NB8800_TXC_CR, txcr | TCR_EN);
-
- err = readl_poll_timeout_atomic(priv->base + NB8800_RXC_CR,
- rxcr, !(rxcr & RCR_EN),
- 1000, 100000);
- } while (err && --retry);
-
- nb8800_mac_af(dev, true);
- nb8800_clearb(priv, NB8800_MAC_MODE, LOOPBACK_EN);
- nb8800_dma_reset(dev);
-
- return retry ? 0 : -ETIMEDOUT;
-}
-
static void nb8800_pause_adv(struct net_device *dev)
{
struct nb8800_priv *priv = netdev_priv(dev);
@@ -941,6 +886,11 @@ static int nb8800_open(struct net_device *dev)
struct phy_device *phydev;
int err;
+ priv->ops->power_up(dev);
+ nb8800_hw_init(dev);
+ priv->ops->init(dev);
+ nb8800_update_mac_addr(dev);
+
/* clear any pending interrupts */
nb8800_writel(priv, NB8800_RXC_SR, 0xf);
nb8800_writel(priv, NB8800_TXC_SR, 0xf);
@@ -993,12 +943,11 @@ static int nb8800_stop(struct net_device *dev)
netif_stop_queue(dev);
napi_disable(&priv->napi);
- nb8800_dma_stop(dev);
- nb8800_mac_rx(dev, false);
- nb8800_mac_tx(dev, false);
-
phy_disconnect(phydev);
+ priv->ops->power_down(dev);
+ priv->speed = 0;
+
free_irq(dev->irq, dev);
nb8800_dma_free(dev);
@@ -1150,7 +1099,7 @@ static const struct ethtool_ops nb8800_ethtool_ops = {
.set_link_ksettings = phy_ethtool_set_link_ksettings,
};
-static int nb8800_hw_init(struct net_device *dev)
+static void nb8800_hw_init(struct net_device *dev)
{
struct nb8800_priv *priv = netdev_priv(dev);
u32 val;
@@ -1230,20 +1179,14 @@ static int nb8800_hw_init(struct net_device *dev)
nb8800_writeb(priv, NB8800_PQ1, val >> 8);
nb8800_writeb(priv, NB8800_PQ2, val & 0xff);
- /* Auto-negotiate by default */
- priv->pause_aneg = true;
- priv->pause_rx = true;
- priv->pause_tx = true;
-
nb8800_mc_init(dev, 0);
-
- return 0;
}
static int nb8800_tangox_init(struct net_device *dev)
{
struct nb8800_priv *priv = netdev_priv(dev);
u32 pad_mode = PAD_MODE_MII;
+ int clk_div;
switch (priv->phy_mode) {
case PHY_INTERFACE_MODE_MII:
@@ -1266,29 +1209,26 @@ static int nb8800_tangox_init(struct net_device *dev)
nb8800_writeb(priv, NB8800_TANGOX_PAD_MODE, pad_mode);
+ clk_div = DIV_ROUND_UP(clk_get_rate(priv->clk), 2 * MAX_MDC_CLOCK);
+ nb8800_writew(priv, NB8800_TANGOX_MDIO_CLKDIV, clk_div);
+
return 0;
}
-static int nb8800_tangox_reset(struct net_device *dev)
+static void nb8800_tango_power_down(struct net_device *dev)
{
- struct nb8800_priv *priv = netdev_priv(dev);
- int clk_div;
-
- nb8800_writeb(priv, NB8800_TANGOX_RESET, 0);
- usleep_range(1000, 10000);
- nb8800_writeb(priv, NB8800_TANGOX_RESET, 1);
-
- wmb(); /* ensure reset is cleared before proceeding */
-
- clk_div = DIV_ROUND_UP(clk_get_rate(priv->clk), 2 * MAX_MDC_CLOCK);
- nb8800_writew(priv, NB8800_TANGOX_MDIO_CLKDIV, clk_div);
+ nb8800_writel(netdev_priv(dev), NB8800_TANGOX_RESET, 0);
+}
- return 0;
+static void nb8800_tango_power_up(struct net_device *dev)
+{
+ nb8800_writel(netdev_priv(dev), NB8800_TANGOX_RESET, 1);
}
static const struct nb8800_ops nb8800_tangox_ops = {
- .init = nb8800_tangox_init,
- .reset = nb8800_tangox_reset,
+ .init = nb8800_tangox_init,
+ .power_down = nb8800_tango_power_down,
+ .power_up = nb8800_tango_power_up,
};
static int nb8800_tango4_init(struct net_device *dev)
@@ -1314,8 +1254,9 @@ static int nb8800_tango4_init(struct net_device *dev)
}
static const struct nb8800_ops nb8800_tango4_ops = {
- .init = nb8800_tango4_init,
- .reset = nb8800_tangox_reset,
+ .init = nb8800_tango4_init,
+ .power_down = nb8800_tango_power_down,
+ .power_up = nb8800_tango_power_up,
};
static const struct of_device_id nb8800_dt_ids[] = {
@@ -1334,7 +1275,6 @@ MODULE_DEVICE_TABLE(of, nb8800_dt_ids);
static int nb8800_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
- const struct nb8800_ops *ops = NULL;
struct nb8800_priv *priv;
struct resource *res;
struct net_device *dev;
@@ -1345,8 +1285,8 @@ static int nb8800_probe(struct platform_device *pdev)
int ret;
match = of_match_device(nb8800_dt_ids, &pdev->dev);
- if (match)
- ops = match->data;
+ if (!match || !match->data)
+ return -ENODEV;
irq = platform_get_irq(pdev, 0);
if (irq <= 0) {
@@ -1388,12 +1328,6 @@ static int nb8800_probe(struct platform_device *pdev)
spin_lock_init(&priv->tx_lock);
- if (ops && ops->reset) {
- ret = ops->reset(dev);
- if (ret)
- goto err_disable_clk;
- }
-
bus = devm_mdiobus_alloc(&pdev->dev);
if (!bus) {
ret = -ENOMEM;
@@ -1435,16 +1369,6 @@ static int nb8800_probe(struct platform_device *pdev)
priv->mii_bus = bus;
- ret = nb8800_hw_init(dev);
- if (ret)
- goto err_deregister_fixed_link;
-
- if (ops && ops->init) {
- ret = ops->init(dev);
- if (ret)
- goto err_deregister_fixed_link;
- }
-
dev->netdev_ops = &nb8800_netdev_ops;
dev->ethtool_ops = &nb8800_ethtool_ops;
dev->flags |= IFF_MULTICAST;
@@ -1457,24 +1381,28 @@ static int nb8800_probe(struct platform_device *pdev)
if (!is_valid_ether_addr(dev->dev_addr))
eth_hw_addr_random(dev);
- nb8800_update_mac_addr(dev);
-
netif_carrier_off(dev);
ret = register_netdev(dev);
if (ret) {
netdev_err(dev, "failed to register netdev\n");
- goto err_free_dma;
+ goto err_deregister_fixed_link;
}
netif_napi_add(dev, &priv->napi, nb8800_poll, NAPI_POLL_WEIGHT);
netdev_info(dev, "MAC address %pM\n", dev->dev_addr);
+ /* Auto-negotiate by default */
+ priv->pause_aneg = true;
+ priv->pause_rx = true;
+ priv->pause_tx = true;
+
+ priv->ops = match->data;
+ priv->ops->power_down(dev);
+
return 0;
-err_free_dma:
- nb8800_dma_free(dev);
err_deregister_fixed_link:
if (of_phy_is_fixed_link(pdev->dev.of_node))
of_phy_deregister_fixed_link(pdev->dev.of_node);
diff --git a/drivers/net/ethernet/aurora/nb8800.h b/drivers/net/ethernet/aurora/nb8800.h
index 6ec4a956e1e5..23fefca54804 100644
--- a/drivers/net/ethernet/aurora/nb8800.h
+++ b/drivers/net/ethernet/aurora/nb8800.h
@@ -305,11 +305,13 @@ struct nb8800_priv {
dma_addr_t tx_desc_dma;
struct clk *clk;
+ const struct nb8800_ops *ops;
};
struct nb8800_ops {
int (*init)(struct net_device *dev);
- int (*reset)(struct net_device *dev);
+ void (*power_down)(struct net_device *dev);
+ void (*power_up)(struct net_device *dev);
};
#endif /* _NB8800_H_ */
--
2.15.0
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