The DMAC and EMAC blocks of Gigabit Ethernet IP found on RZ/G2L SoC are
similar to the R-Car Ethernet AVB IP. With a few changes in the driver we
can support both IPs.
Currently a runtime decision based on the chip type is used to distinguish
the HW differences between the SoC families.
The number of TX descriptors for R-Car Gen3 is 1 whereas on R-Car Gen2 and
RZ/G2L it is 2. For cases like this it is better to select the number of
TX descriptors by using a structure with a value, rather than a runtime
decision based on the chip type.
This patch adds the num_tx_desc variable to struct ravb_hw_info and also
replaces the driver data chip type with struct ravb_hw_info by moving chip
type to it.
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
---
v2:
* Incorporated Andrew and Sergei's review comments for making it smaller patch
and provided detailed description.
---
drivers/net/ethernet/renesas/ravb.h | 7 +++++
drivers/net/ethernet/renesas/ravb_main.c | 38 +++++++++++++++---------
2 files changed, 31 insertions(+), 14 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 80e62ca2e3d3..cfb972c05b34 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -988,6 +988,11 @@ enum ravb_chip_id {
RCAR_GEN3,
};
+struct ravb_hw_info {
+ enum ravb_chip_id chip_id;
+ int num_tx_desc;
+};
+
struct ravb_private {
struct net_device *ndev;
struct platform_device *pdev;
@@ -1040,6 +1045,8 @@ struct ravb_private {
unsigned txcidm:1; /* TX Clock Internal Delay Mode */
unsigned rgmii_override:1; /* Deprecated rgmii-*id behavior */
int num_tx_desc; /* TX descriptors per packet */
+
+ const struct ravb_hw_info *info;
};
static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index f4dfe9f71d06..ffbd224d8780 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1924,12 +1924,22 @@ static int ravb_mdio_release(struct ravb_private *priv)
return 0;
}
+static const struct ravb_hw_info ravb_gen3_hw_info = {
+ .chip_id = RCAR_GEN3,
+ .num_tx_desc = NUM_TX_DESC_GEN3,
+};
+
+static const struct ravb_hw_info ravb_gen2_hw_info = {
+ .chip_id = RCAR_GEN2,
+ .num_tx_desc = NUM_TX_DESC_GEN2,
+};
+
static const struct of_device_id ravb_match_table[] = {
- { .compatible = "renesas,etheravb-r8a7790", .data = (void *)RCAR_GEN2 },
- { .compatible = "renesas,etheravb-r8a7794", .data = (void *)RCAR_GEN2 },
- { .compatible = "renesas,etheravb-rcar-gen2", .data = (void *)RCAR_GEN2 },
- { .compatible = "renesas,etheravb-r8a7795", .data = (void *)RCAR_GEN3 },
- { .compatible = "renesas,etheravb-rcar-gen3", .data = (void *)RCAR_GEN3 },
+ { .compatible = "renesas,etheravb-r8a7790", .data = &ravb_gen2_hw_info },
+ { .compatible = "renesas,etheravb-r8a7794", .data = &ravb_gen2_hw_info },
+ { .compatible = "renesas,etheravb-rcar-gen2", .data = &ravb_gen2_hw_info },
+ { .compatible = "renesas,etheravb-r8a7795", .data = &ravb_gen3_hw_info },
+ { .compatible = "renesas,etheravb-rcar-gen3", .data = &ravb_gen3_hw_info },
{ }
};
MODULE_DEVICE_TABLE(of, ravb_match_table);
@@ -2034,8 +2044,8 @@ static void ravb_set_delay_mode(struct net_device *ndev)
static int ravb_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
+ const struct ravb_hw_info *info;
struct ravb_private *priv;
- enum ravb_chip_id chip_id;
struct net_device *ndev;
int error, irq, q;
struct resource *res;
@@ -2058,9 +2068,9 @@ static int ravb_probe(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
- chip_id = (enum ravb_chip_id)of_device_get_match_data(&pdev->dev);
+ info = of_device_get_match_data(&pdev->dev);
- if (chip_id == RCAR_GEN3)
+ if (info->chip_id == RCAR_GEN3)
irq = platform_get_irq_byname(pdev, "ch22");
else
irq = platform_get_irq(pdev, 0);
@@ -2073,6 +2083,7 @@ static int ravb_probe(struct platform_device *pdev)
SET_NETDEV_DEV(ndev, &pdev->dev);
priv = netdev_priv(ndev);
+ priv->info = info;
priv->ndev = ndev;
priv->pdev = pdev;
priv->num_tx_ring[RAVB_BE] = BE_TX_RING_SIZE;
@@ -2099,7 +2110,7 @@ static int ravb_probe(struct platform_device *pdev)
priv->avb_link_active_low =
of_property_read_bool(np, "renesas,ether-link-active-low");
- if (chip_id == RCAR_GEN3) {
+ if (info->chip_id == RCAR_GEN3) {
irq = platform_get_irq_byname(pdev, "ch24");
if (irq < 0) {
error = irq;
@@ -2124,7 +2135,7 @@ static int ravb_probe(struct platform_device *pdev)
}
}
- priv->chip_id = chip_id;
+ priv->chip_id = info->chip_id;
priv->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(priv->clk)) {
@@ -2142,8 +2153,7 @@ static int ravb_probe(struct platform_device *pdev)
ndev->max_mtu = 2048 - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
ndev->min_mtu = ETH_MIN_MTU;
- priv->num_tx_desc = chip_id == RCAR_GEN2 ?
- NUM_TX_DESC_GEN2 : NUM_TX_DESC_GEN3;
+ priv->num_tx_desc = info->num_tx_desc;
/* Set function */
ndev->netdev_ops = &ravb_netdev_ops;
@@ -2184,7 +2194,7 @@ static int ravb_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&priv->ts_skb_list);
/* Initialise PTP Clock driver */
- if (chip_id != RCAR_GEN2)
+ if (info->chip_id != RCAR_GEN2)
ravb_ptp_init(ndev, pdev);
/* Debug message level */
@@ -2232,7 +2242,7 @@ static int ravb_probe(struct platform_device *pdev)
priv->desc_bat_dma);
/* Stop PTP Clock driver */
- if (chip_id != RCAR_GEN2)
+ if (info->chip_id != RCAR_GEN2)
ravb_ptp_stop(ndev);
out_disable_refclk:
clk_disable_unprepare(priv->refclk);
--
2.17.1
