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mx6cuboxi: fixup dtb ethernet phy nodes before booting an OS

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SoM revision 1.9 has replaced the ar8035 phy address 0 with an adin1300
at address 1. Because early SoMs had a hardware flaw, the ar8035 can
also appear at address 4 - making it a total of 3 phy nodes in the DTB.

To avoid confusing Linux with probe errors, fixup the dtb to only enable
the phy node that is detected at runtime.

Signed-off-by: Josua Mayer <josua@solid-run.com>
This commit is contained in:
Josua Mayer 2022-05-19 12:31:59 +03:00 committed by Stefano Babic
parent 17baba4682
commit 741ce3084e
2 changed files with 79 additions and 0 deletions
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78
board/solidrun/mx6cuboxi/mx6cuboxi.c
View file

@ -1,5 +1,7 @@
// SPDX-License-Identifier: GPL-2.0+ // SPDX-License-Identifier: GPL-2.0+
/* /*
* Copyright (C) 2022 Josua Mayer <josua@solid-run.com>
*
* Copyright (C) 2015 Freescale Semiconductor, Inc. * Copyright (C) 2015 Freescale Semiconductor, Inc.
* *
* Author: Fabio Estevam <fabio.estevam@freescale.com> * Author: Fabio Estevam <fabio.estevam@freescale.com>
@ -39,6 +41,8 @@
#include <spl.h> #include <spl.h>
#include <usb.h> #include <usb.h>
#include <usb/ehci-ci.h> #include <usb/ehci-ci.h>
#include <netdev.h>
#include <phy.h>
DECLARE_GLOBAL_DATA_PTR; DECLARE_GLOBAL_DATA_PTR;
@ -407,6 +411,80 @@ out:
return 0; return 0;
} }
static int find_ethernet_phy(void)
{
struct mii_dev *bus = NULL;
struct phy_device *phydev = NULL;
int phy_addr = -ENOENT;
#ifdef CONFIG_FEC_MXC
bus = fec_get_miibus(ENET_BASE_ADDR, -1);
if (!bus)
return -ENOENT;
// scan address 0, 1, 4
phydev = phy_find_by_mask(bus, 0b00010011);
if (!phydev) {
free(bus);
return -ENOENT;
}
pr_debug("%s: detected ethernet phy at address %d\n", __func__, phydev->addr);
phy_addr = phydev->addr;
free(phydev);
#endif
return phy_addr;
}
#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
/*
* Configure the correct ethernet PHYs nodes in device-tree:
* - AR8035 at addresses 0 or 4: Cubox
* - AR8035 at address 0: HummingBoard, HummingBoard 2
* - ADIN1300 at address 1: since SoM rev 1.9
*/
int ft_board_setup(void *fdt, struct bd_info *bd)
{
int node_phy0, node_phy1, node_phy4;
int ret, phy;
bool enable_phy0 = false, enable_phy1 = false, enable_phy4 = false;
// detect phy
phy = find_ethernet_phy();
if (phy == 0 || phy == 4) {
enable_phy0 = true;
switch (board_type()) {
case CUBOXI:
case UNKNOWN:
default:
enable_phy4 = true;
}
} else if (phy == 1) {
enable_phy1 = true;
} else {
pr_err("%s: couldn't detect ethernet phy, not patching dtb!\n", __func__);
return 0;
}
// update all phy nodes status
node_phy0 = fdt_path_offset(fdt, "/soc/bus@2100000/ethernet@2188000/mdio/ethernet-phy@0");
ret = fdt_setprop_string(fdt, node_phy0, "status", enable_phy0 ? "okay" : "disabled");
if (ret < 0 && enable_phy0)
pr_err("%s: failed to enable ethernet phy at address 0 in dtb!\n", __func__);
node_phy1 = fdt_path_offset(fdt, "/soc/bus@2100000/ethernet@2188000/mdio/ethernet-phy@1");
ret = fdt_setprop_string(fdt, node_phy1, "status", enable_phy1 ? "okay" : "disabled");
if (ret < 0 && enable_phy1)
pr_err("%s: failed to enable ethernet phy at address 1 in dtb!\n", __func__);
node_phy4 = fdt_path_offset(fdt, "/soc/bus@2100000/ethernet@2188000/mdio/ethernet-phy@4");
ret = fdt_setprop_string(fdt, node_phy4, "status", enable_phy4 ? "okay" : "disabled");
if (ret < 0 && enable_phy4)
pr_err("%s: failed to enable ethernet phy at address 4 in dtb!\n", __func__);
return 0;
}
#endif
/* Override the default implementation, DT model is not accurate */ /* Override the default implementation, DT model is not accurate */
int show_board_info(void) int show_board_info(void)
{ {

1
configs/mx6cuboxi_defconfig
View file

@ -22,6 +22,7 @@ CONFIG_CMD_HDMIDETECT=y
CONFIG_AHCI=y CONFIG_AHCI=y
CONFIG_DISTRO_DEFAULTS=y CONFIG_DISTRO_DEFAULTS=y
CONFIG_FIT=y CONFIG_FIT=y
CONFIG_OF_BOARD_SETUP=y
CONFIG_BOOTCOMMAND="run findfdt; run finduuid; run distro_bootcmd" CONFIG_BOOTCOMMAND="run findfdt; run finduuid; run distro_bootcmd"
CONFIG_USE_PREBOOT=y CONFIG_USE_PREBOOT=y
CONFIG_PREBOOT="if hdmidet; then usb start; setenv stdin serial,usbkbd; setenv stdout serial,vidconsole; setenv stderr serial,vidconsole; else setenv stdin serial; setenv stdout serial; setenv stderr serial; fi;" CONFIG_PREBOOT="if hdmidet; then usb start; setenv stdin serial,usbkbd; setenv stdout serial,vidconsole; setenv stderr serial,vidconsole; else setenv stdin serial; setenv stdout serial; setenv stderr serial; fi;"