mips: octeon: Add octeon_fdt.c

Import octeon_fdt.c from 2013 U-Boot. It will be used by the later
added drivers to support PCIe and networking on the MIPS Octeon II / III
platforms.

Signed-off-by: Aaron Williams <awilliams@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>

1 files changed, 1040 insertions, 0 deletions

diff --git a/arch/mips/mach-octeon/octeon_fdt.c b/arch/mips/mach-octeon/octeon_fdt.c
new file mode 100644
index 0000000..199f692
--- /dev/null
+++ b/arch/mips/mach-octeon/octeon_fdt.c
@@ -0,0 +1,1040 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Marvell International Ltd.
+ */
+
+#include <env.h>
+#include <log.h>
+#include <i2c.h>
+#include <net.h>
+#include <dm/device.h>
+#include <linux/delay.h>
+
+#include <mach/cvmx-regs.h>
+#include <mach/cvmx-csr.h>
+#include <mach/cvmx-bootmem.h>
+#include <mach/octeon-model.h>
+#include <mach/octeon_eth.h>
+#include <mach/octeon_fdt.h>
+#include <mach/cvmx-helper-fdt.h>
+#include <mach/cvmx-helper-gpio.h>
+#include <mach/cvmx-fuse.h>
+#include <mach/octeon-feature.h>
+#include <mach/cvmx-qlm.h>
+#include <mach/octeon_qlm.h>
+#include <asm/gpio.h>
+
+#ifdef CONFIG_PCA953X
+#include <pca953x.h>
+#endif
+#ifdef CONFIG_PCF857X
+#include <pcf857x.h>
+#endif
+#ifdef CONFIG_PCA9698
+#include <pca9698.h>
+#endif
+#ifdef CONFIG_PCA9554
+#include <pca9554.h>
+#endif
+#ifdef CONFIG_PCA9555
+#include <pca9555.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_PCA9554
+static const char * const pca9554_gpio_list[] = {
+	"pca9554",
+	"nxp,pca9554",
+	"ti,pca9554",
+	NULL,
+};
+#endif
+
+#ifdef CONFIG_PCA9555
+static const char * const pca9555_gpio_list[] = {
+	"pca9535",    "nxp,pca9535", "pca9539", "nxp,pca9539", "pca9555",
+	"nxp,pca9555", "ti,pca9555", "max7312", "maxim,max7312", "max7313",
+	"maxim,max7313", "tca6416", "tca9539",    NULL,
+};
+#endif
+
+#ifdef CONFIG_PCA9698
+/** List of compatible strings supported by pca9698 driver */
+static const char * const pca9698_gpio_list[] = {
+	"nxp,pca9505", "pca9505", "nxp,pca9698", "pca9698", NULL,
+};
+#endif
+
+#ifdef CONFIG_PCA953X
+/** List of compatible strings supported by pca953x driver */
+static const char * const pca953x_gpio_list[] = {
+	"nxp,pca9534", "nxp,pca9535", "nxp,pca9536", "nxp,pca9537", "nxp,pca9538", "nxp,pca9539",
+	"nxp,pca953x", "nxp,pca9554", "nxp,pca9555", "nxp,pca9556", "nxp,pca9557", "nxp,pca6107",
+	"pca9534",     "pca9535",     "pca9536",     "pca9537",	    "pca9538",	   "pca9539",
+	"pca953x",     "pca9554",     "pca9555",     "pca9556",	    "pca9557",	   "max7310",
+	"max7312",     "max7313",     "max7315",     "pca6107",	    "tca6408",	   "tca6416",
+	"tca9555",     NULL
+};
+#endif
+
+#ifdef CONFIG_PHY_VITESSE
+static const char * const vitesse_vsc8488_gpio_list[] = {
+	"vitesse,vsc8486",   "microsemi,vsc8486", "vitesse,vsc8488",
+	"microsemi,vsc8488", "vitesse,vsc8489",	  "microsemi,vsc8489",
+	"vitesse,vsc8490",   "microsemi,vsc8490", NULL
+};
+#endif
+
+/** List of compatible strings supported by Octeon driver */
+static const char * const octeon_gpio_list[] = {
+	"cavium,octeon-7890-gpio",
+	"cavium,octeon-3860-gpio",
+	NULL
+};
+
+/**
+ * Trims nodes from the flat device tree.
+ *
+ * @param fdt - pointer to working FDT, usually in gd->fdt_blob
+ * @param fdt_key - key to preserve.  All non-matching keys are removed
+ * @param trim_name - name of property to look for.  If NULL use
+ *		      'cavium,qlm-trim'
+ *
+ * The key should look something like device #, type where device # is a
+ * number from 0-9 and type is a string describing the type.  For QLM
+ * operations this would typically contain the QLM number followed by
+ * the type in the device tree, like "0,xaui", "0,sgmii", etc.  This function
+ * will trim all items in the device tree which match the device number but
+ * have a type which does not match.  For example, if a QLM has a xaui module
+ * installed on QLM 0 and "0,xaui" is passed as a key, then all FDT nodes that
+ * have "0,xaui" will be preserved but all others, i.e. "0,sgmii" will be
+ * removed.
+ *
+ * Note that the trim_name must also match.  If trim_name is NULL then it
+ * looks for the property "cavium,qlm-trim".
+ *
+ * Also, when the trim_name is "cavium,qlm-trim" or NULL that the interfaces
+ * will also be renamed based on their register values.
+ *
+ * For example, if a PIP interface is named "interface@W" and has the property
+ * reg = <0> then the interface will be renamed after this function to
+ * interface@0.
+ *
+ * @return 0 for success.
+ */
+int __octeon_fdt_patch(void *fdt, const char *fdt_key, const char *trim_name)
+{
+	bool rename = !trim_name || !strcmp(trim_name, "cavium,qlm-trim");
+
+	return octeon_fdt_patch_rename(fdt, fdt_key, trim_name, rename, NULL, NULL);
+}
+
+int octeon_fdt_patch(void *fdt, const char *fdt_key, const char *trim_name)
+	__attribute__((weak, alias("__octeon_fdt_patch")));
+
+/**
+ * Trims nodes from the flat device tree.
+ *
+ * @param fdt - pointer to working FDT, usually in gd->fdt_blob
+ * @param fdt_key - key to preserve.  All non-matching keys are removed
+ * @param trim_name - name of property to look for.  If NULL use
+ *		      'cavium,qlm-trim'
+ * @param rename - set to TRUE to rename interfaces.
+ * @param callback - function to call on matched nodes.
+ * @param cbarg - passed to callback.
+ *
+ * The key should look something like device #, type where device # is a
+ * number from 0-9 and type is a string describing the type.  For QLM
+ * operations this would typically contain the QLM number followed by
+ * the type in the device tree, like "0,xaui", "0,sgmii", etc.  This function
+ * will trim all items in the device tree which match the device number but
+ * have a type which does not match.  For example, if a QLM has a xaui module
+ * installed on QLM 0 and "0,xaui" is passed as a key, then all FDT nodes that
+ * have "0,xaui" will be preserved but all others, i.e. "0,sgmii" will be
+ * removed.
+ *
+ * Note that the trim_name must also match.  If trim_name is NULL then it
+ * looks for the property "cavium,qlm-trim".
+ *
+ * Also, when the trim_name is "cavium,qlm-trim" or NULL that the interfaces
+ * will also be renamed based on their register values.
+ *
+ * For example, if a PIP interface is named "interface@W" and has the property
+ * reg = <0> then the interface will be renamed after this function to
+ * interface@0.
+ *
+ * @return 0 for success.
+ */
+int octeon_fdt_patch_rename(void *fdt, const char *fdt_key,
+			    const char *trim_name, bool rename,
+			    void (*callback)(void *fdt, int offset, void *arg),
+			    void *cbarg)
+	__attribute__((weak, alias("__octeon_fdt_patch_rename")));
+
+int __octeon_fdt_patch_rename(void *fdt, const char *fdt_key,
+			      const char *trim_name, bool rename,
+			      void (*callback)(void *fdt, int offset, void *arg),
+			      void *cbarg)
+{
+	int fdt_key_len;
+	int offset, next_offset;
+	int aliases;
+	const void *aprop;
+	char qlm[32];
+	char *mode;
+	int qlm_key_len;
+	int rc;
+	int cpu_node;
+
+	if (!trim_name)
+		trim_name = "cavium,qlm-trim";
+
+	strncpy(qlm, fdt_key, sizeof(qlm));
+	mode = qlm;
+	strsep(&mode, ",");
+	qlm_key_len = strlen(qlm);
+
+	debug("In %s: Patching FDT header at 0x%p with key \"%s\"\n", __func__, fdt, fdt_key);
+	if (!fdt || fdt_check_header(fdt) != 0) {
+		printf("%s: Invalid device tree\n", __func__);
+		return -1;
+	}
+
+	fdt_key_len = strlen(fdt_key) + 1;
+
+	/* Prune out the unwanted parts based on the QLM mode.  */
+	offset = 0;
+	for (offset = fdt_next_node(fdt, offset, NULL); offset >= 0; offset = next_offset) {
+		int len;
+		const char *val;
+		const char *val_comma;
+
+		next_offset = fdt_next_node(fdt, offset, NULL);
+
+		val = fdt_getprop(fdt, offset, trim_name, &len);
+		if (!val)
+			continue;
+
+		debug("fdt found trim name %s, comparing key \"%s\"(%d) with \"%s\"(%d)\n",
+		      trim_name, fdt_key, fdt_key_len, val, len);
+		val_comma = strchr(val, ',');
+		if (!val_comma || (val_comma - val) != qlm_key_len)
+			continue;
+		if (strncmp(val, qlm, qlm_key_len) != 0)
+			continue; /* Not this QLM. */
+
+		debug("fdt key number \"%s\" matches\n", val);
+		if (!fdt_stringlist_contains(val, len, fdt_key)) {
+			debug("Key \"%s\" does not match \"%s\"\n", val, fdt_key);
+			/* This QLM, but wrong mode.  Delete it. */
+			/* See if there's an alias that needs deleting */
+			val = fdt_getprop(fdt, offset, "cavium,qlm-trim-alias", NULL);
+			if (val) {
+				debug("Trimming alias \"%s\"\n", val);
+				aliases = fdt_path_offset(fdt, "/aliases");
+				if (aliases) {
+					aprop = fdt_getprop(fdt, aliases, val, NULL);
+					if (aprop) {
+						rc = fdt_nop_property(fdt, aliases, val);
+						if (rc) {
+							printf("Error: Could not NOP alias %s in fdt\n",
+							       val);
+						}
+					} else {
+						printf("Error: could not find /aliases/%s in device tree\n",
+						       val);
+					}
+				} else {
+					puts("Error: could not find /aliases in device tree\n");
+				}
+			}
+			debug("fdt trimming matching key %s\n", fdt_key);
+			next_offset = fdt_parent_offset(fdt, offset);
+			rc = fdt_nop_node(fdt, offset);
+			if (rc)
+				printf("Error %d noping node in device tree\n", rc);
+		}
+	}
+
+	debug("%s: Starting pass 2 for key %s\n", __func__, fdt_key);
+	/* Second pass: Rewrite names and remove key properties.  */
+	offset = -1;
+	for (offset = fdt_next_node(fdt, offset, NULL); offset >= 0; offset = next_offset) {
+		int len;
+		const char *val = fdt_getprop(fdt, offset, trim_name, &len);
+
+		next_offset = fdt_next_node(fdt, offset, NULL);
+
+		if (!val)
+			continue;
+		debug("Searching stringlist %s for %s\n", val, fdt_key);
+		if (fdt_stringlist_contains(val, len, fdt_key)) {
+			char new_name[64];
+			const char *name;
+			const char *at;
+			int reg;
+
+			debug("Found key %s at offset 0x%x\n", fdt_key, offset);
+			fdt_nop_property(fdt, offset, trim_name);
+
+			if (rename) {
+				name = fdt_get_name(fdt, offset, NULL);
+				debug("  name: %s\n", name);
+				if (!name)
+					continue;
+				at = strchr(name, '@');
+				if (!at)
+					continue;
+
+				reg = fdtdec_get_int(fdt, offset, "reg", -1);
+				if (reg == -1)
+					continue;
+
+				debug("  reg: %d\n", reg);
+				len = at - name + 1;
+				debug("  len: %d\n", len);
+				if (len + 9 >= sizeof(new_name))
+					continue;
+
+				memcpy(new_name, name, len);
+				cpu_node = cvmx_fdt_get_cpu_node(fdt, offset);
+				if (cpu_node > 0)
+					snprintf(new_name + len, sizeof(new_name) - len, "%x_%x",
+						 cpu_node, reg);
+				else
+					sprintf(new_name + len, "%x", reg);
+				debug("Renaming cpu node %d %s to %s\n", cpu_node, name, new_name);
+				fdt_set_name(fdt, offset, new_name);
+			}
+			if (callback)
+				callback(fdt, offset, cbarg);
+
+			/* Structure may have changed, start at the beginning. */
+			next_offset = 0;
+		}
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_CMD_NET
+static void octeon_set_one_fdt_mac(int node, uint64_t *mac)
+{
+	u8 mac_addr[6];
+	int r;
+
+	mac_addr[5] = *mac & 0xff;
+	mac_addr[4] = (*mac >> 8) & 0xff;
+	mac_addr[3] = (*mac >> 16) & 0xff;
+	mac_addr[2] = (*mac >> 24) & 0xff;
+	mac_addr[1] = (*mac >> 32) & 0xff;
+	mac_addr[0] = (*mac >> 40) & 0xff;
+
+	r = fdt_setprop_inplace(working_fdt, node, "local-mac-address", mac_addr, 6);
+	if (r == 0)
+		*mac = *mac + 1;
+}
+
+static uint64_t convert_mac(const u8 mac_addr[6])
+{
+	int i;
+	u64 mac = 0;
+
+	for (i = 0; i < 6; i++)
+		mac = (mac << 8) | mac_addr[i];
+	return mac;
+}
+
+/**
+ * Fix up the MAC address in the flat device tree based on the MAC address
+ * stored in ethaddr or in the board descriptor.
+ *
+ * NOTE: This function is weak and an alias for __octeon_fixup_fdt_mac_addr.
+ */
+void octeon_fixup_fdt_mac_addr(void) __attribute__((weak, alias("__octeon_fixup_fdt_mac_addr")));
+
+void __octeon_fixup_fdt_mac_addr(void)
+{
+	int node, pip, interface, ethernet;
+	int i, e;
+	u64 mac = 0;
+	uchar mac_addr[6];
+	char name[20];
+	bool env_mac_addr_valid;
+	const char *p;
+
+	debug("%s: env ethaddr: %s\n", __func__, (p = env_get("ethaddr")) ? p : "not set");
+	if (eth_env_get_enetaddr("ethaddr", mac_addr)) {
+		mac = convert_mac(mac_addr);
+		env_mac_addr_valid = true;
+	} else {
+		mac = convert_mac((uint8_t *)gd->arch.mac_desc.mac_addr_base);
+		env_mac_addr_valid = false;
+	}
+
+	debug("%s: mac_addr: %pM, board mac: %pM, env valid: %s\n", __func__, mac_addr,
+	      gd->arch.mac_desc.mac_addr_base, env_mac_addr_valid ? "true" : "false");
+
+	if (env_mac_addr_valid && memcmp(mac_addr, (void *)gd->arch.mac_desc.mac_addr_base, 6))
+		printf("Warning: the environment variable ethaddr is set to %pM\n"
+		       "which does not match the board descriptor MAC address %pM.\n"
+		       "Please clear the ethaddr environment variable with the command\n"
+		       "\"setenv -f ethaddr; saveenv\" or change the board MAC address with the command\n"
+		       "\"tlv_eeprom set mac %pM\" to change the board MAC address so that it matches\n"
+		       "the environment address.\n"
+		       "Note: the correct MAC address is usually the one stored in the tlv EEPROM.\n",
+		       mac_addr, gd->arch.mac_desc.mac_addr_base, mac_addr);
+
+	for (i = 0; i < 2; i++) {
+		sprintf(name, "mix%x", i);
+		p = fdt_get_alias(working_fdt, name);
+		if (p) {
+			node = fdt_path_offset(working_fdt, p);
+			if (node > 0)
+				octeon_set_one_fdt_mac(node, &mac);
+		}
+	}
+
+	for (i = 0; i < 2; i++) {
+		sprintf(name, "rgmii%x", i);
+		p = fdt_get_alias(working_fdt, name);
+		if (p) {
+			node = fdt_path_offset(working_fdt, p);
+			if (node > 0)
+				octeon_set_one_fdt_mac(node, &mac);
+		}
+	}
+
+	pip = fdt_node_offset_by_compatible(working_fdt, -1, "cavium,octeon-3860-pip");
+
+	if (pip > 0)
+		for (i = 0; i < 8; i++) {
+			sprintf(name, "interface@%d", i);
+			interface = fdt_subnode_offset(working_fdt, pip, name);
+			if (interface <= 0)
+				continue;
+			for (e = 0; e < 16; e++) {
+				sprintf(name, "ethernet@%d", e);
+				ethernet = fdt_subnode_offset(working_fdt, interface, name);
+				if (ethernet <= 0)
+					continue;
+				octeon_set_one_fdt_mac(ethernet, &mac);
+			}
+		}
+
+	/* Assign 78XX addresses in the order they appear in the device tree. */
+	node = fdt_node_offset_by_compatible(working_fdt, -1, "cavium,octeon-7890-bgx-port");
+	while (node != -FDT_ERR_NOTFOUND) {
+		octeon_set_one_fdt_mac(node, &mac);
+		node = fdt_node_offset_by_compatible(working_fdt, node,
+						     "cavium,octeon-7890-bgx-port");
+	}
+}
+#endif
+
+/**
+ * This function fixes the clock-frequency in the flat device tree for the UART.
+ *
+ * NOTE: This function is weak and an alias for __octeon_fixup_fdt_uart.
+ */
+void octeon_fixup_fdt_uart(void) __attribute__((weak, alias("__octeon_fixup_fdt_uart")));
+
+void __octeon_fixup_fdt_uart(void)
+{
+	u32 clk;
+	int node;
+
+	clk = gd->bus_clk;
+
+	/* Device trees already have good values for fast simulator
+	 * output, real boards need the correct value.
+	 */
+	node = fdt_node_offset_by_compatible(working_fdt, -1, "cavium,octeon-3860-uart");
+	while (node != -FDT_ERR_NOTFOUND) {
+		fdt_setprop_inplace_cell(working_fdt, node, "clock-frequency", clk);
+		node = fdt_node_offset_by_compatible(working_fdt, node, "cavium,octeon-3860-uart");
+	}
+}
+
+/**
+ * This function fills in the /memory portion of the flat device tree.
+ *
+ * NOTE: This function is weak and aliased to __octeon_fixup_fdt_memory.
+ */
+void octeon_fixup_fdt_memory(void) __attribute__((weak, alias("__octeon_fixup_fdt_memory")));
+
+void __octeon_fixup_fdt_memory(void)
+{
+	u64 sizes[3], addresses[3];
+	u64 size_left = gd->ram_size;
+	int num_addresses = 0;
+	int rc;
+	int node;
+
+	size_left = gd->ram_size;
+	sizes[num_addresses] = min_t(u64, size_left, 256 * 1024 * 1024);
+	size_left -= sizes[num_addresses];
+	addresses[num_addresses] = 0;
+	num_addresses++;
+
+	if (size_left > 0) {
+		sizes[num_addresses] = size_left;
+		addresses[num_addresses] = 0x20000000ULL;
+		num_addresses++;
+	}
+
+	node = fdt_path_offset(working_fdt, "/memory");
+	if (node < 0)
+		node = fdt_add_subnode(working_fdt, fdt_path_offset(working_fdt, "/"), "memory");
+	if (node < 0) {
+		printf("Could not add memory section to fdt: %s\n", fdt_strerror(node));
+		return;
+	}
+	rc = fdt_fixup_memory_banks(working_fdt, addresses, sizes, num_addresses);
+	if (rc != 0)
+		printf("%s: fdt_fixup_memory_banks returned %d when adding %d addresses\n",
+		       __func__, rc, num_addresses);
+}
+
+void octeon_fixup_fdt(void) __attribute__((weak, alias("__octeon_fixup_fdt")));
+
+void __octeon_fixup_fdt(void)
+{
+	if (!working_fdt)
+		return;
+
+#ifdef CONFIG_CMD_NET
+	octeon_fixup_fdt_mac_addr();
+#endif /* CONFIG_CMD_NET */
+
+#if !CONFIG_OCTEON_SIM_SPEED
+	octeon_fixup_fdt_uart();
+#endif
+
+	octeon_fixup_fdt_memory();
+}
+
+int __board_fixup_fdt(void)
+{
+	/*
+	 * Nothing to do in this dummy implementation
+	 */
+	return 0;
+}
+
+int board_fixup_fdt(void) __attribute__((weak, alias("__board_fixup_fdt")));
+
+/**
+ * This is a helper function to find the offset of a PHY device given
+ * an Ethernet device.
+ *
+ * @param[in] eth - Ethernet device to search for PHY offset
+ *
+ * @returns offset of phy info in device tree or -1 if not found
+ */
+//int octeon_fdt_find_phy(const struct eth_device *eth)
+int octeon_fdt_find_phy(const struct udevice *eth)
+{
+	int aliases;
+	const void *fdt = gd->fdt_blob;
+	const char *pip_path;
+	int pip;
+	char buffer[64];
+#if 0
+	struct octeon_eth_info *oct_eth_info =
+				 (struct octeon_eth_info *)eth->priv;
+#else
+	struct octeon_eth_info *oct_eth_info = dev_get_priv(eth);
+#endif
+	int interface, index;
+	int phandle;
+	int phy;
+	u32 *phy_handle;
+
+	aliases = fdt_path_offset(fdt, "/aliases");
+	if (aliases < 0) {
+		puts("/aliases not found in device tree!\n");
+		return -1;
+	}
+	pip_path = fdt_getprop(fdt, aliases, "pip", NULL);
+	if (!pip_path) {
+		puts("pip not found in aliases in device tree\n");
+		return -1;
+	}
+	pip = fdt_path_offset(fdt, pip_path);
+	if (pip < 0) {
+		puts("pip not found in device tree\n");
+		return -1;
+	}
+	snprintf(buffer, sizeof(buffer), "interface@%d", oct_eth_info->interface);
+	interface = fdt_subnode_offset(fdt, pip, buffer);
+	if (interface < 0) {
+		printf("%s: interface@%d not found in device tree for %s\n", __func__,
+		       oct_eth_info->interface, eth->name);
+		return -1;
+	}
+	snprintf(buffer, sizeof(buffer), "ethernet@%x", oct_eth_info->index);
+	index = fdt_subnode_offset(fdt, interface, buffer);
+	if (index < 0) {
+		printf("%s: ethernet@%x not found in device tree for %s\n", __func__,
+		       oct_eth_info->index, eth->name);
+		return -1;
+	}
+	phy_handle = (uint32_t *)fdt_getprop(fdt, index, "phy-handle", NULL);
+	if (phy_handle < 0) {
+		printf("%s: phy-handle not found for %s\n", __func__, eth->name);
+		return -1;
+	}
+	phandle = fdt32_to_cpu(*phy_handle);
+	phy = fdt_node_offset_by_phandle(fdt, phandle);
+	if (phy < 0) {
+		printf("%s: phy not found for %s\n", __func__, eth->name);
+		return -1;
+	}
+
+	return phy;
+}
+
+/**
+ * This helper function returns if a node contains the specified vendor name.
+ *
+ * @param[in]	fdt		pointer to device tree blob
+ * @param	nodeoffset	offset of the tree node
+ * @param[in]	vendor		name of vendor to check
+ *
+ * returns:
+ *	0, if the node has a compatible vendor string property
+ *	1, if the node does not contain the vendor string property
+ *	-FDT_ERR_NOTFOUND, if the given node has no 'compatible' property
+ *	-FDT_ERR_BADOFFSET, if nodeoffset does not refer to a BEGIN_NODE tag
+ *	-FDT_ERR_BADMAGIC,
+ *	-FDT_ERR_BADVERSION,
+ *	-FDT_BADSTATE,
+ *	-FDT_ERR_BADSTRUCTURE, standard meanings
+ */
+int octeon_fdt_compat_vendor(const void *fdt, int nodeoffset, const char *vendor)
+{
+	const char *strlist;
+	const char *p;
+	int len;
+	int listlen;
+
+	strlist = fdt_getprop(fdt, nodeoffset, "compatible", &listlen);
+	if (!strlist)
+		return listlen;
+
+	len = strlen(vendor);
+
+	debug("%s(%p, %d, %s (%p)) strlist: %s (%p), len: %d\n", __func__, fdt, nodeoffset, vendor,
+	      vendor, strlist, strlist, len);
+	while (listlen >= len) {
+		debug("  Comparing %d bytes of %s and %s\n", len, vendor, strlist);
+		if ((memcmp(vendor, strlist, len) == 0) &&
+		    ((strlist[len] == ',') || (strlist[len] == '\0')))
+			return 0;
+		p = memchr(strlist, '\0', listlen);
+		if (!p)
+			return 1; /* malformed strlist.. */
+		listlen -= (p - strlist) + 1;
+		strlist = p + 1;
+	}
+	return 1;
+}
+
+/**
+ * Given a node in the device tree get the OCTEON OCX node number
+ *
+ * @param fdt		pointer to flat device tree
+ * @param nodeoffset	node offset to get OCX node for
+ *
+ * @return the Octeon OCX node number
+ */
+int octeon_fdt_get_soc_node(const void *fdt, int nodeoffset)
+{
+	return 0;
+}
+
+/**
+ * Given a FDT node, check if it is compatible with a list of devices
+ *
+ * @param[in]	fdt		Flat device tree pointer
+ * @param	node_offset	Node offset in device tree
+ * @param[in]	strlist		Array of FDT devices to check, end must be NULL
+ *
+ * @return	0 if at least one device is compatible, 1 if not compatible.
+ */
+int octeon_fdt_node_check_compatible(const void *fdt, int node_offset,
+				     const char *const *strlist)
+{
+	while (*strlist && **strlist) {
+		debug("%s: Checking %s\n", __func__, *strlist);
+		if (!fdt_node_check_compatible(fdt, node_offset, *strlist)) {
+			debug("%s: match found\n", __func__);
+			return 0;
+		}
+		strlist++;
+	}
+	debug("%s: No match found\n", __func__);
+	return 1;
+}
+
+/**
+ * Given a node offset, find the i2c bus number for that node
+ *
+ * @param[in]	fdt	Pointer to flat device tree
+ * @param	node_offset	Node offset in device tree
+ *
+ * @return	i2c bus number or -1 if error
+ */
+int octeon_fdt_i2c_get_bus(const void *fdt, int node_offset)
+{
+	const char *compat;
+	const u64 addresses[] = { 0x1180000001000, 0x1180000001200 };
+	u64 reg;
+	int i;
+	int bus = -1;
+	bool found = false;
+
+	if (octeon_has_feature(OCTEON_FEATURE_CIU3))
+		compat = "cavium,octeon-7890-twsi";
+	else
+		compat = "cavium,octeon-3860-twsi";
+
+	while (node_offset > 0 &&
+	       !(found = !fdt_node_check_compatible(fdt, node_offset, compat))) {
+		node_offset = fdt_parent_offset(fdt, node_offset);
+#ifdef CONFIG_OCTEON_I2C_FDT
+		bus = i2c_get_bus_num_fdt(node_offset);
+		if (bus >= 0) {
+			debug("%s: Found bus 0x%x\n", __func__, bus);
+			return bus;
+		}
+#endif
+	}
+	if (!found) {
+		printf("Error: node %d in device tree is not a child of the I2C bus\n",
+		       node_offset);
+		return -1;
+	}
+
+	reg = fdtdec_get_addr(fdt, node_offset, "reg");
+	if (reg == FDT_ADDR_T_NONE) {
+		printf("%s: Error: invalid reg address for TWSI bus\n", __func__);
+		return -1;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(addresses); i++)
+		if (reg == addresses[i]) {
+			bus = i;
+			break;
+		}
+
+	debug("%s: bus 0x%x\n", __func__, bus);
+	return bus;
+}
+
+/**
+ * Given an offset into the fdt, output the i2c bus and address of the device
+ *
+ * @param[in]	fdt	fdt blob pointer
+ * @param	node	offset in FDT of device
+ * @param[out]	bus	i2c bus number of device
+ * @param[out]	addr	address of device on i2c bus
+ *
+ * @return	0 for success, -1 on error
+ */
+int octeon_fdt_get_i2c_bus_addr(const void *fdt, int node, int *bus, int *addr)
+{
+	*bus = octeon_fdt_i2c_get_bus(fdt, fdt_parent_offset(fdt, node));
+	if (*bus < 0) {
+		printf("%s: Could not get parent i2c bus\n", __func__);
+		return -1;
+	}
+	*addr = fdtdec_get_int(fdt, node, "reg", -1);
+	if (*addr < 0)
+		return -1;
+	return 0;
+}
+
+/**
+ * Reads a GPIO pin given the node of the GPIO device in the device tree and
+ * the pin number.
+ *
+ * @param[in]	fdt	fdt blob pointer
+ * @param	phandle	phandle of GPIO node
+ * @param	pin	pin number to read
+ *
+ * @return	0 = pin is low, 1 = pin is high, -1 = error
+ */
+int octeon_fdt_read_gpio(const void *fdt, int phandle, int pin)
+{
+	enum cvmx_gpio_type type;
+	__maybe_unused int node;
+	__maybe_unused int addr;
+	__maybe_unused int bus;
+	__maybe_unused int old_bus;
+	int num_pins;
+	int value;
+
+	type = cvmx_fdt_get_gpio_type(fdt, phandle, &num_pins);
+	if ((pin & 0xff) >= num_pins) {
+		debug("%s: pin number %d out of range\n", __func__, pin);
+		return -1;
+	}
+	switch (type) {
+#ifdef CONFIG_PCA953X
+	case CVMX_GPIO_PIN_PCA953X:
+		node = fdt_node_offset_by_phandle(fdt, phandle);
+		if (octeon_fdt_get_i2c_bus_addr(fdt, node, &bus, &addr)) {
+			printf("%s: Could not get gpio bus and/or address\n", __func__);
+			return -1;
+		}
+		value = pca953x_get_val(bus, addr);
+		if (value < 0) {
+			printf("%s: Error reading PCA953X GPIO at 0x%x:0x%x\n", __func__, bus,
+			       addr);
+			return -1;
+		}
+		value = (value >> pin) & 1;
+		break;
+#endif
+#ifdef CONFIG_PCF857X
+	case CVMX_GPIO_PIN_PCF857X:
+		node = fdt_node_offset_by_phandle(fdt, phandle);
+		if (octeon_fdt_get_i2c_bus_addr(fdt, node, &bus, &addr)) {
+			printf("%s: Could not get gpio bus and/or address\n", __func__);
+			return -1;
+		}
+		value = pcf857x_get_val(bus, addr);
+		if (value < 0) {
+			printf("%s: Error reading PCF857X GPIO at 0x%x:0x%x\n", __func__, bus,
+			       addr);
+			return -1;
+		}
+		value = (value >> pin) & 1;
+		break;
+#endif
+#ifdef CONFIG_PCA9698
+	case CVMX_GPIO_PIN_PCA9698:
+		node = fdt_node_offset_by_phandle(fdt, phandle);
+		if (octeon_fdt_get_i2c_bus_addr(fdt, node, &bus, &addr)) {
+			printf("%s: Could not get gpio bus and/or address\n", __func__);
+			return -1;
+		}
+		old_bus = i2c_get_bus_num();
+		i2c_set_bus_num(bus);
+		value = pca9698_get_value(addr, pin);
+		i2c_set_bus_num(old_bus);
+		break;
+#endif
+	case CVMX_GPIO_PIN_OCTEON:
+		value = gpio_get_value(pin);
+		break;
+	default:
+		printf("%s: Unknown GPIO type %d\n", __func__, type);
+		return -1;
+	}
+	return value;
+}
+
+/**
+ * Reads a GPIO pin given the node of the GPIO device in the device tree and
+ * the pin number.
+ *
+ * @param[in]	fdt	fdt blob pointer
+ * @param	phandle	phandle of GPIO node
+ * @param	pin	pin number to read
+ * @param	val	value to write (1 = high, 0 = low)
+ *
+ * @return	0 = success, -1 = error
+ */
+int octeon_fdt_set_gpio(const void *fdt, int phandle, int pin, int val)
+{
+	enum cvmx_gpio_type type;
+	int node;
+	int num_pins;
+	__maybe_unused int addr;
+	__maybe_unused int bus;
+	__maybe_unused int old_bus;
+	__maybe_unused int rc;
+
+	node = fdt_node_offset_by_phandle(fdt, phandle);
+	if (node < 0) {
+		printf("%s: Invalid phandle\n", __func__);
+		return -1;
+	}
+
+	type = cvmx_fdt_get_gpio_type(fdt, phandle, &num_pins);
+	if ((pin & 0xff) >= num_pins) {
+		debug("%s: pin number %d out of range\n", __func__, pin);
+		return -1;
+	}
+	switch (type) {
+#ifdef CONFIG_PCA953X
+	case CVMX_GPIO_PIN_PCA953X:
+		if (octeon_fdt_get_i2c_bus_addr(fdt, node, &bus, &addr)) {
+			printf("%s: Could not get gpio bus and/or address\n", __func__);
+			return -1;
+		}
+
+		return pca953x_set_val(bus, addr, 1 << pin, val << pin);
+#endif
+#ifdef CONFIG_PCF857X
+	case CVMX_GPIO_PIN_PCF857X:
+		if (octeon_fdt_get_i2c_bus_addr(fdt, node, &bus, &addr)) {
+			printf("%s: Could not get gpio bus and/or address\n", __func__);
+			return -1;
+		}
+		return pcf957x_set_val(bus, addr, 1 << pin, val << pin);
+#endif
+#ifdef CONFIG_PCA9698
+	case CVMX_GPIO_PIN_PCA9698:
+		if (octeon_fdt_get_i2c_bus_addr(fdt, node, &bus, &addr)) {
+			printf("%s: Could not get gpio bus and/or address\n", __func__);
+			return -1;
+		}
+		old_bus = i2c_get_bus_num();
+		i2c_set_bus_num(bus);
+		rc = pca9698_set_value(addr, pin, val);
+		i2c_set_bus_num(old_bus);
+		return rc;
+#endif
+	case CVMX_GPIO_PIN_OCTEON:
+		return gpio_set_value(pin, val);
+	default:
+		printf("%s: Unknown GPIO type %d\n", __func__, type);
+		return -1;
+	}
+}
+
+/**
+ * Given the node of a GPIO entry output the GPIO type, i2c bus and i2c
+ * address.
+ *
+ * @param	fdt_node	node of GPIO in device tree, generally
+ *				derived from a phandle.
+ * @param[out]	type		Type of GPIO detected
+ * @param[out]	i2c_bus		For i2c GPIO expanders, the i2c bus number
+ * @param[out]	i2c_addr	For i2c GPIO expanders, the i2c address
+ *
+ * @return	0 for success, -1 for errors
+ *
+ * NOTE: It is up to the caller to determine the pin number.
+ */
+int octeon_fdt_get_gpio_info(int fdt_node, enum octeon_gpio_type *type,
+			     int *i2c_bus, int *i2c_addr)
+{
+	const void *fdt = gd->fdt_blob;
+
+	int i2c_bus_node __attribute__((unused));
+
+	*type = GPIO_TYPE_UNKNOWN;
+
+	if (!octeon_fdt_node_check_compatible(fdt, fdt_node, octeon_gpio_list)) {
+		debug("%s: Found Octeon compatible GPIO\n", __func__);
+		*type = GPIO_TYPE_OCTEON;
+		if (i2c_bus)
+			*i2c_bus = -1;
+		if (i2c_addr)
+			*i2c_addr = -1;
+		return 0;
+	}
+#ifdef CONFIG_PCA9555
+	if (!octeon_fdt_node_check_compatible(fdt, fdt_node, pca9555_gpio_list)) {
+		debug("%s: Found PCA9555 type compatible GPIO\n", __func__);
+		*type = GPIO_TYPE_PCA9555;
+	}
+#endif
+#ifdef CONFIG_PCA9554
+	if (!octeon_fdt_node_check_compatible(fdt, fdt_node, pca9554_gpio_list)) {
+		debug("%s: Found PCA9555 type compatible GPIO\n", __func__);
+		*type = GPIO_TYPE_PCA9554;
+	}
+#endif
+#ifdef CONFIG_PCA953X
+	if (!octeon_fdt_node_check_compatible(fdt, fdt_node, pca953x_gpio_list)) {
+		debug("%s: Found PCA953x compatible GPIO", __func__);
+		*type = GPIO_TYPE_PCA953X;
+	}
+#endif
+#ifdef CONFIG_PCA9698
+	if (!octeon_fdt_node_check_compatible(fdt, fdt_node, pca9698_gpio_list)) {
+		debug("%s: Found PCA9698 compatible GPIO", __func__);
+		*type = GPIO_TYPE_PCA9698;
+	}
+#endif
+#if defined(CONFIG_PCA953X) || defined(CONFIG_PCA9698) || \
+	defined(CONFIG_PCA9555) || defined(CONFIG_PCA9554)
+	if (!i2c_addr || !i2c_bus) {
+		printf("%s: Error: i2c_addr or i2c_bus is NULL\n", __func__);
+		return -1;
+	}
+
+	*i2c_addr = fdtdec_get_int(fdt, fdt_node, "reg", -1);
+	i2c_bus_node = fdt_parent_offset(fdt, fdt_node);
+	if (i2c_bus_node < 0) {
+		printf("%s: Invalid parent\n", __func__);
+		return -1;
+	}
+	*i2c_bus = i2c_get_bus_num_fdt(i2c_bus_node);
+#endif
+	return (*type != GPIO_TYPE_UNKNOWN) ? 0 : -1;
+}
+
+#ifdef CONFIG_PHY_VITESSE
+/**
+ * Given a node in the flat device tree, return the matching PHY device
+ *
+ * @param	fdt_node	FDT node in device tree
+ *
+ * @return	pointer to PHY device or NULL if none found.
+ */
+static struct phy_device *octeon_fdt_get_phy_device_from_node(int fdt_node)
+{
+	struct eth_device *dev;
+	int i = 0;
+	struct octeon_eth_info *ethinfo = NULL;
+
+	do {
+		dev = eth_get_dev_by_index(i++);
+		if (!dev)
+			return NULL;
+		ethinfo = dev->priv;
+		if (ethinfo->phy_offset == fdt_node)
+			return ethinfo->phydev;
+	} while (dev);
+	return NULL;
+}
+#endif
+
+/**
+ * Get the PHY data structure for the specified FDT node and output the type
+ *
+ * @param	fdt_node	FDT node of phy
+ * @param[out]	type		Type of GPIO
+ *
+ * @return	pointer to phy device or NULL if no match found.
+ */
+struct phy_device *octeon_fdt_get_phy_gpio_info(int fdt_node, enum octeon_gpio_type *type)
+{
+#ifdef CONFIG_PHY_VITESSE
+	struct phy_device *phydev;
+
+	if (!octeon_fdt_node_check_compatible(gd->fdt_blob, fdt_node,
+					      vitesse_vsc8488_gpio_list)) {
+		phydev = octeon_fdt_get_phy_device_from_node(fdt_node);
+		if (phydev) {
+			debug("%s: Found Vitesse VSC848X compatible GPIO\n", __func__);
+			*type = GPIO_TYPE_VSC8488;
+			return phydev;
+		}
+
+		debug("%s: Error: phy device not found!\n", __func__);
+		return NULL;
+	}
+
+	debug("%s: No compatible Vitesse PHY type found\n", __func__);
+#endif
+	return NULL;
+}