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ravb: Add MII support for R-Car V4M

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All EtherAVB instances on R-Car Gen3/Gen4 SoCs support the RGMII
interface.  In addition, the first two EtherAVB instances on R-Car V4M
also support the MII interface, but this is not yet supported by the
driver.

Add support for MII on R-Car Gen4 by adding an R-Car Gen4-specific EMAC
initialization function that selects the MII clock instead of the RGMII
clock when the PHY interface is MII.  Note that all implementations of
EtherAVB on R-Car Gen4 SoCs have the APSR register, but only MII-capable
instances are documented to have the MIISELECT bit, which has a
documented value of zero when reserved.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://patch.msgid.link/3a21d1d6680864aa85afff9260234c2b8054020a.1719234830.git.geert+renesas@glider.be
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Geert Uytterhoeven
2024-06-24 15:25:25 +02:00
committed by Jakub Kicinski
parent 8d653d26ff
commit 6e0713cc82
2 changed files with 37 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/renesas/ravb.h
View File

@@ -258,6 +258,7 @@ enum APSR_BIT {
APSR_CMSW = 0x00000010,
APSR_RDM = 0x00002000,
APSR_TDM = 0x00004000,
APSR_MIISELECT = 0x01000000, /* R-Car V4M only */
};
/* RCR */

37
drivers/net/ethernet/renesas/ravb_main.c
View File

@@ -579,6 +579,16 @@ static void ravb_emac_init_rcar(struct net_device *ndev)
ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP, ECSIPR);
}
static void ravb_emac_init_rcar_gen4(struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
bool mii = priv->phy_interface == PHY_INTERFACE_MODE_MII;
ravb_modify(ndev, APSR, APSR_MIISELECT, mii ? APSR_MIISELECT : 0);
ravb_emac_init_rcar(ndev);
}
/* E-MAC init function */
static void ravb_emac_init(struct net_device *ndev)
{
@@ -2699,6 +2709,31 @@ static const struct ravb_hw_info ravb_gen3_hw_info = {
.magic_pkt = 1,
};
static const struct ravb_hw_info ravb_gen4_hw_info = {
.receive = ravb_rx_rcar,
.set_rate = ravb_set_rate_rcar,
.set_feature = ravb_set_features_rcar,
.dmac_init = ravb_dmac_init_rcar,
.emac_init = ravb_emac_init_rcar_gen4,
.gstrings_stats = ravb_gstrings_stats,
.gstrings_size = sizeof(ravb_gstrings_stats),
.net_hw_features = NETIF_F_RXCSUM,
.net_features = NETIF_F_RXCSUM,
.stats_len = ARRAY_SIZE(ravb_gstrings_stats),
.tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
.rx_max_frame_size = SZ_2K,
.rx_buffer_size = SZ_2K +
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)),
.rx_desc_size = sizeof(struct ravb_ex_rx_desc),
.internal_delay = 1,
.tx_counters = 1,
.multi_irqs = 1,
.irq_en_dis = 1,
.ccc_gac = 1,
.nc_queues = 1,
.magic_pkt = 1,
};
static const struct ravb_hw_info ravb_rzv2m_hw_info = {
.receive = ravb_rx_rcar,
.set_rate = ravb_set_rate_rcar,
@@ -2751,7 +2786,7 @@ static const struct of_device_id ravb_match_table[] = {
{ .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 },
{ .compatible = "renesas,etheravb-rcar-gen4", .data = &ravb_gen3_hw_info },
{ .compatible = "renesas,etheravb-rcar-gen4", .data = &ravb_gen4_hw_info },
{ .compatible = "renesas,etheravb-rzv2m", .data = &ravb_rzv2m_hw_info },
{ .compatible = "renesas,rzg2l-gbeth", .data = &gbeth_hw_info },
{ }