[PATCH 05/10] ravb: Initialize GbEthernet DMAC
From: Biju Das <biju.das.jz@bp.renesas.com>
Date: 2021-10-01 15:07:07
Also in:
linux-renesas-soc
Subsystem:
networking drivers, renesas ethernet avb driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Niklas Söderlund, Linus Torvalds
Initialize GbEthernet DMAC found on RZ/G2L SoC. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> --- RFC->v1: * Removed RIC3 initialization from DMAC init, as it is same as reset value. * moved stubs function to earlier patches. * renamed "rgeth" with "gbeth" --- drivers/net/ethernet/renesas/ravb.h | 3 ++- drivers/net/ethernet/renesas/ravb_main.c | 30 +++++++++++++++++++++++- 2 files changed, 31 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index f6398fdcead2..9cd3a15743b4 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h@@ -81,6 +81,7 @@ enum ravb_reg { RQC3 = 0x00A0, RQC4 = 0x00A4, RPC = 0x00B0, + RTC = 0x00B4, /* R-Car Gen3 and RZ/G2L only */ UFCW = 0x00BC, UFCS = 0x00C0, UFCV0 = 0x00C4,
@@ -193,7 +194,7 @@ enum ravb_reg { GECMR = 0x05b0, MAHR = 0x05c0, MALR = 0x05c8, - TROCR = 0x0700, /* R-Car Gen3 only */ + TROCR = 0x0700, /* R-Car Gen3 and RZ/G2L only */ CEFCR = 0x0740, FRECR = 0x0748, TSFRCR = 0x0750,
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index dc817b4d95a1..5790a9332e7b 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c@@ -489,7 +489,35 @@ static void ravb_emac_init(struct net_device *ndev) static int ravb_dmac_init_gbeth(struct net_device *ndev) { - /* Place holder */ + int error; + + error = ravb_ring_init(ndev, RAVB_BE); + if (error) + return error; + + /* Descriptor format */ + ravb_ring_format(ndev, RAVB_BE); + + /* Set AVB RX */ + ravb_write(ndev, 0x60000000, RCR); + + /* Set Max Frame Length (RTC) */ + ravb_write(ndev, 0x7ffc0000 | GBETH_RX_BUFF_MAX, RTC); + + /* Set FIFO size */ + ravb_write(ndev, 0x00222200, TGC); + + ravb_write(ndev, 0, TCCR); + + /* Frame receive */ + ravb_write(ndev, RIC0_FRE0, RIC0); + /* Disable FIFO full warning */ + ravb_write(ndev, 0x0, RIC1); + /* Receive FIFO full error, descriptor empty */ + ravb_write(ndev, RIC2_QFE0 | RIC2_RFFE, RIC2); + + ravb_write(ndev, TIC_FTE0, TIC); + return 0; }
--
2.17.1