Hi,
I am trying to get the PRU ethernet drivers to function using linux SDK 8.0. I am running into an issue when on bootup, or whenever I try to manually start the icssg-prueth module, I get the error code: "icssg-prueth pruss2_eth: unable to get PRU0: -19". My device tree for the prueth is as follows, I copied it from an example:
/* Dual Ethernet application node on PRU-ICSSG2 */
pruss2_eth: pruss2_eth {
compatible = "ti,am654-icssg-prueth";
pinctrl-names = "default";
pinctrl-0 = <&icssg2_rgmii_pins_default>;
sram = <&msmc_ram>;
prus = <&pru2_0>, <&rtu2_0>, <&tx_pru2_0>, <&pru2_1>, <&rtu2_1>, <&tx_pru2_1>;
firmware-name = "ti-pruss/am65x-sr2-pru0-prueth-fw.elf",
"ti-pruss/am65x-sr2-rtu0-prueth-fw.elf",
"ti-pruss/am65x-sr2-txpru0-prueth-fw.elf",
"ti-pruss/am65x-sr2-pru1-prueth-fw.elf",
"ti-pruss/am65x-sr2-rtu1-prueth-fw.elf",
"ti-pruss/am65x-sr2-txpru1-prueth-fw.elf";
ti,pruss-gp-mux-sel = <2>, /* MII mode */
<2>,
<2>,
<2>, /* MII mode */
<2>,
<2>;
mii-g-rt = <&icssg2_mii_g_rt>;
mii-rt = <&icssg2_mii_rt>;
dma-coherent;
dmas = <&main_udmap 0xc300>, /* egress slice 0 */
<&main_udmap 0xc301>, /* egress slice 0 */
<&main_udmap 0xc302>, /* egress slice 0 */
<&main_udmap 0xc303>, /* egress slice 0 */
<&main_udmap 0xc304>, /* egress slice 1 */
<&main_udmap 0xc305>, /* egress slice 1 */
<&main_udmap 0xc306>, /* egress slice 1 */
<&main_udmap 0xc307>, /* egress slice 1 */
<&main_udmap 0x4300>, /* ingress slice 0 */
<&main_udmap 0x4301>, /* ingress slice 1 */
<&main_udmap 0x4302>, /* mgmnt rsp slice 0 */
<&main_udmap 0x4303>; /* mgmnt rsp slice 1 */
dma-names = "tx0-0", "tx0-1", "tx0-2", "tx0-3",
"tx1-0", "tx1-1", "tx1-2", "tx1-3",
"rx0", "rx1",
"rxmgm0", "rxmgm1";
pruss2_emac0: ethernet-mii0 {
phy-handle = <&pruss2_eth0_phy>;
phy-mode = "rgmii-rxid";
interrupts-extended = <&icssg2_intc 24>;
syscon-rgmii-delay = <&scm_conf 0x4120>;
iep = <&icssg2_iep0>;
/* Filled in by bootloader */
local-mac-address = [00 00 00 00 00 00];
};
pruss2_emac1: ethernet-mii1 {
phy-handle = <&pruss2_eth1_phy>;
phy-mode = "rgmii-rxid";
interrupts-extended = <&icssg2_intc 25>;
syscon-rgmii-delay = <&scm_conf 0x4124>;
/* Filled in by bootloader */
local-mac-address = [00 00 00 00 00 00];
};
};
//pinmux stuff...
&icssg2_mdio {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&icssg2_mdio_pins_default>;
pruss2_eth0_phy: ethernet-phy@0 {
reg = <0>;
ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
};
pruss2_eth1_phy: ethernet-phy@3 {
reg = <3>;
ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
};
};
I'm not sure where to go from here. I tried manually loading and starting the pru firmware and then rmmod the icssg-prueth and restart it as follows but still get the same error:
echo 'ti-pruss/am65x-sr2-pru0-prueth-fw.elf' > /sys/class/remoteproc/remoteproc13/firmware
echo 'ti-pruss/am65x-sr2-rtu0-prueth-fw.elf' > /sys/class/remoteproc/remoteproc14/firmware
echo 'ti-pruss/am65x-sr2-txpru0-prueth-fw.elf' > /sys/class/remoteproc/remoteproc15/firmware
echo 'ti-pruss/am65x-sr2-pru1-prueth-fw.elf' > /sys/class/remoteproc/remoteproc16/firmware
echo 'ti-pruss/am65x-sr2-rtu1-prueth-fw.elf' > /sys/class/remoteproc/remoteproc17/firmware
echo 'ti-pruss/am65x-sr2-txpru1-prueth-fw.elf' > /sys/class/remoteproc/remoteproc18/firmware
echo 'start' > /sys/class/remoteproc/remoteproc13/state
echo 'start' > /sys/class/remoteproc/remoteproc14/state
echo 'start' > /sys/class/remoteproc/remoteproc15/state
echo 'start' > /sys/class/remoteproc/remoteproc16/state
echo 'start' > /sys/class/remoteproc/remoteproc17/state
echo 'start' > /sys/class/remoteproc/remoteproc18/state
Any suggestions? I am guessing I am missing something simple here. Thanks!
