[PATCH v2 u-boot-marvell 3/4] arm: mvebu: turris_mox: Setup Linux's device tree before boot
Marek Behún
marek.behun at nic.cz
Fri Apr 3 17:25:00 CEST 2020
Patch Linux's device tree according to which Mox modules are connected.
Linux's device tree has all possible Mox module nodes preprogrammed, but
in disabled state.
If MOX B, MOX F or MOX G module is present, this code enables the PCI
node.
For the network modules (MOX C, MOX D and MOX E) are present, the code
enables corresponding ethernet and swtich nodes and DSA connections.
For the SFP cage the SFP GPIO controller node and SFP node are also
enabled.
Signed-off-by: Marek Behún <marek.behun at nic.cz>
---
board/CZ.NIC/turris_mox/turris_mox.c | 263 +++++++++++++++++++++++++++
configs/turris_mox_defconfig | 1 +
2 files changed, 264 insertions(+)
diff --git a/board/CZ.NIC/turris_mox/turris_mox.c b/board/CZ.NIC/turris_mox/turris_mox.c
index 0b13d1d190..bc0d067889 100644
--- a/board/CZ.NIC/turris_mox/turris_mox.c
+++ b/board/CZ.NIC/turris_mox/turris_mox.c
@@ -3,6 +3,7 @@
* Copyright (C) 2018 Marek Behun <marek.behun at nic.cz>
*/
+#include <stdarg.h>
#include <common.h>
#include <init.h>
#include <asm/gpio.h>
@@ -34,7 +35,11 @@
#define ARMADA_37XX_SPI_DOUT 0xd0010608
#define ARMADA_37XX_SPI_DIN 0xd001060c
+#define ETH1_PATH "/soc/internal-regs at d0000000/ethernet at 40000"
+#define MDIO_PATH "/soc/internal-regs at d0000000/mdio at 32004"
+#define SFP_GPIO_PATH "/soc/internal-regs at d0000000/spi at 10600/moxtet at 1/gpio at 0"
#define PCIE_PATH "/soc/pcie at d0070000"
+#define SFP_PATH "/sfp"
DECLARE_GLOBAL_DATA_PTR;
@@ -551,3 +556,261 @@ int last_stage_init(void)
return 0;
}
+
+#if defined(CONFIG_OF_BOARD_SETUP)
+
+static int vnode_by_path(void *blob, const char *fmt, va_list ap)
+{
+ char path[128];
+
+ vsprintf(path, fmt, ap);
+ return fdt_path_offset(blob, path);
+}
+
+static int node_by_path(void *blob, const char *fmt, ...)
+{
+ va_list ap;
+ int res;
+
+ va_start(ap, fmt);
+ res = vnode_by_path(blob, fmt, ap);
+ va_end(ap);
+
+ return res;
+}
+
+static int phandle_by_path(void *blob, const char *fmt, ...)
+{
+ va_list ap;
+ int node, phandle, res;
+
+ va_start(ap, fmt);
+ node = vnode_by_path(blob, fmt, ap);
+ va_end(ap);
+
+ if (node < 0)
+ return node;
+
+ phandle = fdt_get_phandle(blob, node);
+ if (phandle > 0)
+ return phandle;
+
+ phandle = fdt_get_max_phandle(blob);
+ if (phandle < 0)
+ return phandle;
+
+ phandle += 1;
+
+ res = fdt_setprop_u32(blob, node, "linux,phandle", phandle);
+ if (res < 0)
+ return res;
+
+ res = fdt_setprop_u32(blob, node, "phandle", phandle);
+ if (res < 0)
+ return res;
+
+ return phandle;
+}
+
+static int enable_by_path(void *blob, const char *fmt, ...)
+{
+ va_list ap;
+ int node;
+
+ va_start(ap, fmt);
+ node = vnode_by_path(blob, fmt, ap);
+ va_end(ap);
+
+ if (node < 0)
+ return node;
+
+ return fdt_setprop_string(blob, node, "status", "okay");
+}
+
+static bool is_topaz(int id)
+{
+ return topaz && id == peridot + topaz - 1;
+}
+
+static int switch_addr(int id)
+{
+ return is_topaz(id) ? 0x2 : 0x10 + id;
+}
+
+static int setup_switch(void *blob, int id)
+{
+ int res, addr, i, node, phandle;
+
+ addr = switch_addr(id);
+
+ /* first enable the switch by setting status = "okay" */
+ res = enable_by_path(blob, MDIO_PATH "/switch%i@%x", id, addr);
+ if (res < 0)
+ return res;
+
+ /*
+ * now if there are more switches or a SFP module coming after,
+ * enable corresponding ports
+ */
+ if (id < peridot + topaz - 1)
+ res = enable_by_path(blob,
+ MDIO_PATH "/switch%i@%x/ports/port at a",
+ id, addr);
+ else if (id == peridot - 1 && !topaz && sfp)
+ res = enable_by_path(blob,
+ MDIO_PATH "/switch%i@%x/ports/port-sfp at a",
+ id, addr);
+ else
+ res = 0;
+ if (res < 0)
+ return res;
+
+ if (id >= peridot + topaz - 1)
+ return 0;
+
+ /* finally change link property if needed */
+ node = node_by_path(blob, MDIO_PATH "/switch%i@%x/ports/port at a", id,
+ addr);
+ if (node < 0)
+ return node;
+
+ for (i = id + 1; i < peridot + topaz; ++i) {
+ phandle = phandle_by_path(blob,
+ MDIO_PATH "/switch%i@%x/ports/port@%x",
+ i, switch_addr(i),
+ is_topaz(i) ? 5 : 9);
+ if (phandle < 0)
+ return phandle;
+
+ if (i == id + 1)
+ res = fdt_setprop_u32(blob, node, "link", phandle);
+ else
+ res = fdt_appendprop_u32(blob, node, "link", phandle);
+ if (res < 0)
+ return res;
+ }
+
+ return 0;
+}
+
+static int remove_disabled_nodes(void *blob)
+{
+ while (1) {
+ int res, offset;
+
+ offset = fdt_node_offset_by_prop_value(blob, -1, "status",
+ "disabled", 9);
+ if (offset < 0)
+ break;
+
+ res = fdt_del_node(blob, offset);
+ if (res < 0)
+ return res;
+ }
+
+ return 0;
+}
+
+int ft_board_setup(void *blob, bd_t *bd)
+{
+ int node, phandle, res;
+
+ /*
+ * If MOX B (PCI), MOX F (USB) or MOX G (Passthrough PCI) modules are
+ * connected, enable the PCIe node.
+ */
+ if (pci || usb || passpci) {
+ node = fdt_path_offset(blob, PCIE_PATH);
+ if (node < 0)
+ return node;
+
+ res = fdt_setprop_string(blob, node, "status", "okay");
+ if (res < 0)
+ return res;
+ }
+
+ /*
+ * If MOX C (Topaz switch) and/or MOX E (Peridot switch) are connected,
+ * enable the eth1 node and setup the switches.
+ */
+ if (peridot || topaz) {
+ int i;
+
+ res = enable_by_path(blob, ETH1_PATH);
+ if (res < 0)
+ return res;
+
+ for (i = 0; i < peridot + topaz; ++i) {
+ res = setup_switch(blob, i);
+ if (res < 0)
+ return res;
+ }
+ }
+
+ /*
+ * If MOX D (SFP cage module) is connected, enable the SFP node and eth1
+ * node. If there is no Peridot switch between MOX A and MOX D, add link
+ * to the SFP node to eth1 node.
+ * Also enable and configure SFP GPIO controller node.
+ */
+ if (sfp) {
+ res = enable_by_path(blob, SFP_PATH);
+ if (res < 0)
+ return res;
+
+ res = enable_by_path(blob, ETH1_PATH);
+ if (res < 0)
+ return res;
+
+ if (!peridot) {
+ phandle = phandle_by_path(blob, SFP_PATH);
+ if (phandle < 0)
+ return res;
+
+ node = node_by_path(blob, ETH1_PATH);
+ if (node < 0)
+ return node;
+
+ res = fdt_setprop_u32(blob, node, "sfp", phandle);
+ if (res < 0)
+ return res;
+
+ res = fdt_setprop_string(blob, node, "phy-mode",
+ "sgmii");
+ if (res < 0)
+ return res;
+ }
+
+ res = enable_by_path(blob, SFP_GPIO_PATH);
+ if (res < 0)
+ return res;
+
+ if (sfp_pos) {
+ char newname[16];
+
+ /* moxtet-sfp is on non-zero position, change default */
+ node = node_by_path(blob, SFP_GPIO_PATH);
+ if (node < 0)
+ return node;
+
+ res = fdt_setprop_u32(blob, node, "reg", sfp_pos);
+ if (res < 0)
+ return res;
+
+ sprintf(newname, "gpio@%x", sfp_pos);
+
+ res = fdt_set_name(blob, node, newname);
+ if (res < 0)
+ return res;
+ }
+ }
+
+ fdt_fixup_ethernet(blob);
+
+ /* Finally remove disabled nodes, as per Rob Herring's request. */
+ remove_disabled_nodes(blob);
+
+ return 0;
+}
+
+#endif
diff --git a/configs/turris_mox_defconfig b/configs/turris_mox_defconfig
index 2e637044c1..3bc69cda4d 100644
--- a/configs/turris_mox_defconfig
+++ b/configs/turris_mox_defconfig
@@ -37,6 +37,7 @@ CONFIG_CMD_BTRFS=y
CONFIG_CMD_EXT4_WRITE=y
CONFIG_MAC_PARTITION=y
CONFIG_OF_BOARD_FIXUP=y
+CONFIG_OF_BOARD_SETUP=y
CONFIG_DEFAULT_DEVICE_TREE="armada-3720-turris-mox"
CONFIG_ENV_IS_IN_SPI_FLASH=y
CONFIG_SYS_RELOC_GD_ENV_ADDR=y
--
2.24.1
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