summaryrefslogtreecommitdiff
path: root/arch/mips/mach-octeon/cvmx-helper-fdt.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/mach-octeon/cvmx-helper-fdt.c')
-rw-r--r--arch/mips/mach-octeon/cvmx-helper-fdt.c488
1 files changed, 488 insertions, 0 deletions
diff --git a/arch/mips/mach-octeon/cvmx-helper-fdt.c b/arch/mips/mach-octeon/cvmx-helper-fdt.c
new file mode 100644
index 00000000000..400c73ad51e
--- /dev/null
+++ b/arch/mips/mach-octeon/cvmx-helper-fdt.c
@@ -0,0 +1,488 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020-2022 Marvell International Ltd.
+ *
+ * FDT Helper functions similar to those provided to U-Boot.
+ */
+
+#include <dm.h>
+#include <i2c.h>
+#include <log.h>
+#include <malloc.h>
+#include <net.h>
+#include <linux/delay.h>
+#include <asm-generic/gpio.h>
+
+#include <mach/cvmx-regs.h>
+#include <mach/cvmx-csr.h>
+#include <mach/cvmx-bootmem.h>
+#include <mach/octeon-model.h>
+#include <mach/octeon_fdt.h>
+#include <mach/cvmx-helper.h>
+#include <mach/cvmx-helper-board.h>
+#include <mach/cvmx-helper-cfg.h>
+#include <mach/cvmx-helper-fdt.h>
+
+/**
+ * Local allocator to handle both SE and U-Boot that also zeroes out memory
+ *
+ * @param size number of bytes to allocate
+ *
+ * Return: pointer to allocated memory or NULL if out of memory.
+ * Alignment is set to 8-bytes.
+ */
+static void *cvmx_fdt_alloc(size_t size)
+{
+ return calloc(size, 1);
+}
+
+int cvmx_ofnode_lookup_phandles(ofnode node, const char *prop_name, int *lenp,
+ ofnode *nodes)
+{
+ const u32 *phandles;
+ int count;
+ int i;
+
+ phandles = ofnode_get_property(node, prop_name, &count);
+ if (!phandles || count < 0)
+ return -FDT_ERR_NOTFOUND;
+
+ count /= 4;
+ if (count > *lenp)
+ count = *lenp;
+
+ for (i = 0; i < count; i++)
+ nodes[i] = ofnode_get_by_phandle(fdt32_to_cpu(phandles[i]));
+
+ *lenp = count;
+ return 0;
+}
+
+/**
+ * Given a FDT node return the CPU node number
+ *
+ * @param[in] fdt_addr Address of FDT
+ * @param node FDT node number
+ *
+ * Return: CPU node number or error if negative
+ */
+int cvmx_fdt_get_cpu_node(const void *fdt_addr, int node)
+{
+ int parent = node;
+ const u32 *ranges;
+ int len = 0;
+
+ while (fdt_node_check_compatible(fdt_addr, parent, "simple-bus") != 0) {
+ parent = fdt_parent_offset(fdt_addr, parent);
+ if (parent < 0)
+ return parent;
+ }
+ ranges = fdt_getprop(fdt_addr, parent, "ranges", &len);
+ if (!ranges)
+ return len;
+
+ if (len == 0)
+ return 0;
+
+ if (len < 24)
+ return -FDT_ERR_TRUNCATED;
+
+ return fdt32_to_cpu(ranges[2]) / 0x10;
+}
+
+/**
+ * Parses all of the channels assigned to a VSC7224 device
+ *
+ * @param[in] fdt_addr Address of flat device tree
+ * @param of_offset Offset of vsc7224 node
+ * @param[in,out] vsc7224 Data structure to hold the data
+ *
+ * Return: 0 for success, -1 on error
+ */
+static int cvmx_fdt_parse_vsc7224_channels(ofnode node,
+ struct cvmx_vsc7224 *vsc7224)
+{
+ struct ofnode_phandle_args phandle;
+ int err = 0;
+ int reg;
+ int num_chan = 0;
+ struct cvmx_vsc7224_chan *channel;
+ struct cvmx_fdt_sfp_info *sfp_info;
+ int len;
+ int num_taps;
+ int i;
+ const u32 *tap_values;
+ int of_mac;
+ int xiface, index;
+ bool is_tx;
+ bool is_qsfp;
+ const char *mac_str;
+ ofnode node_chan;
+
+ debug("%s(%x, %s)\n", __func__, ofnode_to_offset(node), vsc7224->name);
+ ofnode_for_each_compatible_node(node_chan, "vitesse,vsc7224-channel") {
+ if (!ofnode_valid(node_chan)) {
+ debug("%s: Error parsing FDT node %s\n",
+ __func__, ofnode_get_name(node));
+ break;
+ }
+
+ if (ofnode_to_offset(ofnode_get_parent(node_chan)) !=
+ ofnode_to_offset(node))
+ break;
+
+ reg = ofnode_get_addr(node_chan);
+ if (reg < 0 || reg > 3) {
+ debug("%s: channel reg is either not present or out of range\n",
+ __func__);
+ err = -1;
+ break;
+ }
+ is_tx = ofnode_read_bool(node_chan, "direction-tx");
+
+ debug("%s(%s): Adding %cx channel %d\n",
+ __func__, vsc7224->name, is_tx ? 't' : 'r',
+ reg);
+ tap_values = ofnode_get_property(node_chan, "taps", &len);
+ if (!tap_values) {
+ debug("%s: Error: no taps defined for vsc7224 channel %d\n",
+ __func__, reg);
+ err = -1;
+ break;
+ }
+
+ if (vsc7224->channel[reg]) {
+ debug("%s: Error: channel %d already assigned at %p\n",
+ __func__, reg,
+ vsc7224->channel[reg]);
+ err = -1;
+ break;
+ }
+ if (len % 16) {
+ debug("%s: Error: tap format error for channel %d\n",
+ __func__, reg);
+ err = -1;
+ break;
+ }
+ num_taps = len / 16;
+ debug("%s: Adding %d taps\n", __func__, num_taps);
+
+ channel = cvmx_fdt_alloc(sizeof(*channel) +
+ num_taps * sizeof(struct cvmx_vsc7224_tap));
+ if (!channel) {
+ debug("%s: Out of memory\n", __func__);
+ err = -1;
+ break;
+ }
+ vsc7224->channel[reg] = channel;
+ channel->num_taps = num_taps;
+ channel->lane = reg;
+ channel->of_offset = ofnode_to_offset(node_chan);
+ channel->is_tx = is_tx;
+ channel->pretap_disable = ofnode_read_bool(node_chan,
+ "pretap-disable");
+ channel->posttap_disable = ofnode_read_bool(node_chan,
+ "posttap-disable");
+ channel->vsc7224 = vsc7224;
+ /* Read all the tap values */
+ for (i = 0; i < num_taps; i++) {
+ channel->taps[i].len = fdt32_to_cpu(tap_values[i * 4 + 0]);
+ channel->taps[i].main_tap = fdt32_to_cpu(tap_values[i * 4 + 1]);
+ channel->taps[i].pre_tap = fdt32_to_cpu(tap_values[i * 4 + 2]);
+ channel->taps[i].post_tap = fdt32_to_cpu(tap_values[i * 4 + 3]);
+ debug("%s: tap %d: len: %d, main_tap: 0x%x, pre_tap: 0x%x, post_tap: 0x%x\n",
+ __func__, i, channel->taps[i].len, channel->taps[i].main_tap,
+ channel->taps[i].pre_tap, channel->taps[i].post_tap);
+ }
+ /* Now find out which interface it's mapped to */
+ channel->ipd_port = -1;
+
+ mac_str = "sfp-mac";
+ if (ofnode_get_property(node_chan, mac_str, NULL)) {
+ is_qsfp = false;
+ } else if (ofnode_get_property(node_chan, "qsfp-mac", NULL)) {
+ is_qsfp = true;
+ mac_str = "qsfp-mac";
+ } else {
+ debug("%s: Error: MAC not found for %s channel %d\n", __func__,
+ vsc7224->name, reg);
+ return -1;
+ }
+
+ err = ofnode_parse_phandle_with_args(node_chan, mac_str, NULL,
+ 0, 0, &phandle);
+ if (err) {
+ debug("%s: Error %d with MAC %s phandle for %s\n", __func__, of_mac,
+ mac_str, vsc7224->name);
+ return -1;
+ }
+
+ debug("%s: Found mac at %s\n", __func__,
+ ofnode_get_name(phandle.node));
+
+ xiface = (ofnode_get_addr(ofnode_get_parent(phandle.node))
+ >> 24) & 0x0f;
+ index = ofnode_get_addr(phandle.node);
+ channel->xiface = xiface;
+ channel->index = index;
+ channel->ipd_port = cvmx_helper_get_ipd_port(xiface, index);
+
+ debug("%s: Found MAC, xiface: 0x%x, index: %d, ipd port: %d\n", __func__,
+ xiface, index, channel->ipd_port);
+ if (channel->ipd_port >= 0) {
+ cvmx_helper_cfg_set_vsc7224_chan_info(xiface, index, channel);
+ debug("%s: Storing config channel for xiface 0x%x, index %d\n",
+ __func__, xiface, index);
+ }
+ sfp_info = cvmx_helper_cfg_get_sfp_info(xiface, index);
+ if (!sfp_info) {
+ debug("%s: Warning: no (Q)SFP+ slot found for xinterface 0x%x, index %d for channel %d\n",
+ __func__, xiface, index, channel->lane);
+ continue;
+ }
+
+ /* Link it */
+ channel->next = sfp_info->vsc7224_chan;
+ if (sfp_info->vsc7224_chan)
+ sfp_info->vsc7224_chan->prev = channel;
+ sfp_info->vsc7224_chan = channel;
+ sfp_info->is_vsc7224 = true;
+ debug("%s: Registering VSC7224 %s channel %d with SFP %s\n", __func__,
+ vsc7224->name, channel->lane, sfp_info->name);
+ if (!sfp_info->mod_abs_changed) {
+ debug("%s: Registering cvmx_sfp_vsc7224_mod_abs_changed at %p for xinterface 0x%x, index %d\n",
+ __func__, &cvmx_sfp_vsc7224_mod_abs_changed, xiface, index);
+ cvmx_sfp_register_mod_abs_changed(
+ sfp_info,
+ &cvmx_sfp_vsc7224_mod_abs_changed,
+ NULL);
+ }
+
+ if (num_chan >= 4)
+ break;
+ }
+
+ return err;
+}
+
+/**
+ * @INTERNAL
+ * Parses all instances of the Vitesse VSC7224 reclocking chip
+ *
+ * @param[in] fdt_addr Address of flat device tree
+ *
+ * Return: 0 for success, error otherwise
+ */
+int __cvmx_fdt_parse_vsc7224(const void *fdt_addr)
+{
+ struct cvmx_vsc7224 *vsc7224 = NULL;
+ ofnode node;
+ int err = 0;
+ static bool parsed;
+ const int *init_array;
+ struct udevice *dev;
+ u16 value;
+ int reg;
+ int len;
+ int ret;
+ int i;
+
+ debug("%s(%p)\n", __func__, fdt_addr);
+
+ if (parsed) {
+ debug("%s: Already parsed\n", __func__);
+ return 0;
+ }
+
+ ofnode_for_each_compatible_node(node, "vitesse,vsc7224") {
+ if (!ofnode_valid(node)) {
+ debug("%s: Error parsing FDT node %s\n",
+ __func__, ofnode_get_name(node));
+ break;
+ }
+
+ vsc7224 = cvmx_fdt_alloc(sizeof(*vsc7224));
+ if (!vsc7224) {
+ debug("%s: Out of memory!\n", __func__);
+ return -1;
+ }
+
+ vsc7224->of_offset = ofnode_to_offset(node);
+ vsc7224->i2c_addr = ofnode_get_addr(node);
+ vsc7224->i2c_bus = cvmx_ofnode_get_i2c_bus(ofnode_get_parent(node));
+ if (vsc7224->i2c_addr < 0) {
+ debug("%s: Error: reg field missing\n", __func__);
+ err = -1;
+ break;
+ }
+ if (!vsc7224->i2c_bus) {
+ debug("%s: Error getting i2c bus\n", __func__);
+ err = -1;
+ break;
+ }
+ vsc7224->name = ofnode_get_name(node);
+ debug("%s: Adding %s\n", __func__, vsc7224->name);
+
+ err = gpio_request_by_name_nodev(node, "reset", 0,
+ &vsc7224->reset_gpio,
+ GPIOD_IS_OUT);
+ if (err) {
+ printf("%s: reset GPIO not found in DT!\n", __func__);
+ return -ENODEV;
+ }
+
+ err = gpio_request_by_name_nodev(node, "los", 0,
+ &vsc7224->los_gpio,
+ GPIOD_IS_IN);
+ if (err) {
+ printf("%s: los GPIO not found in DT!\n", __func__);
+ return -ENODEV;
+ }
+
+ /*
+ * This code was taken from the NIC23 board specific code
+ * but should be better placed here in the common code
+ */
+ debug("%s: Putting device in reset\n", __func__);
+ dm_gpio_set_value(&vsc7224->reset_gpio, 1);
+ mdelay(10);
+ debug("%s: Taking device out of reset\n", __func__);
+ dm_gpio_set_value(&vsc7224->reset_gpio, 0);
+ mdelay(50);
+
+ init_array = ofnode_get_property(node, "vitesse,reg-init",
+ &len);
+ if (!init_array) {
+ debug("%s: No initialization array\n", __func__);
+ continue;
+ }
+ if ((len % 8) != 0) {
+ printf("%s: Error: register init string should be an array of reg number followed by value\n",
+ __func__);
+ return -1;
+ }
+
+ ret = i2c_get_chip(vsc7224->i2c_bus->i2c_bus,
+ vsc7224->i2c_addr, 1, &dev);
+ if (ret) {
+ debug("Cannot find I2C device: %d\n", ret);
+ return -1;
+ }
+
+ for (i = 0; i < len / sizeof(int); i += 2) {
+ u8 buffer[2];
+
+ reg = fdt32_to_cpu(init_array[i]);
+ value = fdt32_to_cpu(init_array[i + 1]);
+ buffer[0] = value >> 8;
+ buffer[1] = value & 0xff;
+ ret = dm_i2c_write(dev, reg, buffer, 2);
+ if (ret) {
+ debug("Cannot write I2C device: %d\n", ret);
+ return -1;
+ }
+
+ debug(" Wrote 0x%02x <= 0x%02x%02x\n", reg,
+ buffer[0], buffer[1]);
+ }
+
+ debug("%s: Parsing channels\n", __func__);
+ err = cvmx_fdt_parse_vsc7224_channels(node, vsc7224);
+ if (err) {
+ debug("%s: Error parsing VSC7224 channels\n", __func__);
+ break;
+ }
+ }
+
+ if (err) {
+ debug("%s(): Error\n", __func__);
+ if (vsc7224) {
+ dm_gpio_free(vsc7224->reset_gpio.dev,
+ &vsc7224->reset_gpio);
+ dm_gpio_free(vsc7224->los_gpio.dev,
+ &vsc7224->los_gpio);
+ if (vsc7224->i2c_bus)
+ cvmx_fdt_free_i2c_bus(vsc7224->i2c_bus);
+ free(vsc7224);
+ }
+ }
+ if (!err)
+ parsed = true;
+
+ return err;
+}
+
+/**
+ * Given the parent offset of an i2c device build up a list describing the bus
+ * which can contain i2c muxes and switches.
+ *
+ * @param[in] node ofnode of the parent node of a GPIO device in
+ * the device tree.
+ *
+ * @return pointer to list of i2c devices starting from the root which
+ * can include i2c muxes and switches or NULL if error. Note that
+ * all entries are allocated on the heap.
+ *
+ * @see cvmx_fdt_free_i2c_bus()
+ */
+struct cvmx_fdt_i2c_bus_info *cvmx_ofnode_get_i2c_bus(ofnode node)
+{
+ struct cvmx_fdt_i2c_bus_info *businfo = NULL;
+ struct udevice *bus;
+ int ret;
+
+ businfo = cvmx_fdt_alloc(sizeof(*businfo));
+ if (!businfo) {
+ debug("Out of memory\n");
+ return NULL;
+ }
+
+ debug("%s: Found node %s\n", __func__, ofnode_get_name(node));
+ businfo->of_offset = ofnode_to_offset(node);
+
+ /*
+ * Get I2C bus and probe it automatically - needed for later use
+ */
+ ret = device_get_global_by_ofnode(node, &bus);
+ if (!bus || ret) {
+ printf("Cannot find a I2C bus\n");
+ return NULL;
+ }
+
+ businfo->i2c_bus = bus;
+
+ return businfo;
+}
+
+/**
+ * Return the Octeon bus number for a bus descriptor
+ *
+ * @param[in] bus bus descriptor
+ *
+ * @return Octeon twsi bus number or -1 on error
+ */
+int cvmx_fdt_i2c_get_root_bus(const struct cvmx_fdt_i2c_bus_info *bus)
+{
+ if (bus->type != CVMX_I2C_BUS_OCTEON)
+ return -1;
+ return bus->channel;
+}
+
+/**
+ * Frees all entries for an i2c bus descriptor
+ *
+ * @param bus bus to free
+ *
+ * @return 0
+ */
+int cvmx_fdt_free_i2c_bus(struct cvmx_fdt_i2c_bus_info *bus)
+{
+ struct cvmx_fdt_i2c_bus_info *last;
+
+ while (bus) {
+ last = bus;
+ bus = bus->child;
+ free(last);
+ }
+ return 0;
+}
generated by cgit v1.2.3 (git 2.0.4) at 2025-08-06 19:43:09 +0000