mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 19:10:13 +00:00
e74ac44f79
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Fixes: 226fce6108
("phy: Track power-on and init counts in uclass")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
555 lines
11 KiB
C
555 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
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* Written by Jean-Jacques Hiblot <jjhiblot@ti.com>
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*/
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#define LOG_CATEGORY UCLASS_PHY
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#include <common.h>
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#include <dm.h>
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#include <dm/device_compat.h>
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#include <dm/devres.h>
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#include <generic-phy.h>
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#include <linux/list.h>
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#include <power/regulator.h>
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/**
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* struct phy_counts - Init and power-on counts of a single PHY port
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*
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* This structure is used to keep track of PHY initialization and power
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* state change requests, so that we don't power off and deinitialize a
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* PHY instance until all of its users want it done. Otherwise, multiple
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* consumers using the same PHY port can cause problems (e.g. one might
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* call power_off() after another's exit() and hang indefinitely).
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*
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* @id: The PHY ID within a PHY provider
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* @power_on_count: Times generic_phy_power_on() was called for this ID
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* without a matching generic_phy_power_off() afterwards
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* @init_count: Times generic_phy_init() was called for this ID
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* without a matching generic_phy_exit() afterwards
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* @list: Handle for a linked list of these structures corresponding to
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* ports of the same PHY provider
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* @supply: Handle to a phy-supply device
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*/
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struct phy_counts {
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unsigned long id;
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int power_on_count;
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int init_count;
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struct list_head list;
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struct udevice *supply;
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};
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static inline struct phy_ops *phy_dev_ops(struct udevice *dev)
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{
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return (struct phy_ops *)dev->driver->ops;
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}
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static struct phy_counts *phy_get_counts(struct phy *phy)
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{
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struct list_head *uc_priv;
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struct phy_counts *counts;
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if (!generic_phy_valid(phy))
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return NULL;
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uc_priv = dev_get_uclass_priv(phy->dev);
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list_for_each_entry(counts, uc_priv, list)
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if (counts->id == phy->id)
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return counts;
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return NULL;
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}
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static int phy_alloc_counts(struct phy *phy, struct udevice *supply)
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{
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struct list_head *uc_priv;
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struct phy_counts *counts;
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if (!generic_phy_valid(phy))
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return 0;
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if (phy_get_counts(phy))
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return 0;
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uc_priv = dev_get_uclass_priv(phy->dev);
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counts = kzalloc(sizeof(*counts), GFP_KERNEL);
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if (!counts)
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return -ENOMEM;
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counts->id = phy->id;
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counts->power_on_count = 0;
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counts->init_count = 0;
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counts->supply = supply;
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list_add(&counts->list, uc_priv);
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return 0;
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}
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static int phy_uclass_pre_probe(struct udevice *dev)
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{
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struct list_head *uc_priv = dev_get_uclass_priv(dev);
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INIT_LIST_HEAD(uc_priv);
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return 0;
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}
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static int phy_uclass_pre_remove(struct udevice *dev)
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{
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struct list_head *uc_priv = dev_get_uclass_priv(dev);
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struct phy_counts *counts, *next;
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list_for_each_entry_safe(counts, next, uc_priv, list)
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kfree(counts);
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return 0;
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}
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static int generic_phy_xlate_offs_flags(struct phy *phy,
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struct ofnode_phandle_args *args)
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{
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debug("%s(phy=%p)\n", __func__, phy);
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if (args->args_count > 1) {
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debug("Invalid args_count: %d\n", args->args_count);
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return -EINVAL;
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}
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if (args->args_count)
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phy->id = args->args[0];
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else
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phy->id = 0;
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return 0;
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}
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int generic_phy_get_by_index_nodev(ofnode node, int index, struct phy *phy)
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{
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struct ofnode_phandle_args args;
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struct phy_ops *ops;
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struct udevice *phydev, *supply = NULL;
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int i, ret;
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debug("%s(node=%s, index=%d, phy=%p)\n",
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__func__, ofnode_get_name(node), index, phy);
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assert(phy);
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phy->dev = NULL;
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ret = ofnode_parse_phandle_with_args(node, "phys", "#phy-cells", 0,
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index, &args);
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if (ret) {
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debug("%s: dev_read_phandle_with_args failed: err=%d\n",
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__func__, ret);
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return ret;
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}
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ret = uclass_get_device_by_ofnode(UCLASS_PHY, args.node, &phydev);
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if (ret) {
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debug("%s: uclass_get_device_by_ofnode failed: err=%d\n",
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__func__, ret);
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/* Check if args.node's parent is a PHY provider */
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ret = uclass_get_device_by_ofnode(UCLASS_PHY,
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ofnode_get_parent(args.node),
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&phydev);
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if (ret)
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return ret;
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/* insert phy idx at first position into args array */
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for (i = args.args_count; i >= 1 ; i--)
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args.args[i] = args.args[i - 1];
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args.args_count++;
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args.args[0] = ofnode_read_u32_default(args.node, "reg", -1);
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}
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phy->dev = phydev;
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ops = phy_dev_ops(phydev);
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if (ops->of_xlate)
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ret = ops->of_xlate(phy, &args);
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else
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ret = generic_phy_xlate_offs_flags(phy, &args);
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if (ret) {
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debug("of_xlate() failed: %d\n", ret);
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goto err;
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}
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if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
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ret = device_get_supply_regulator(phydev, "phy-supply",
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&supply);
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if (ret && ret != -ENOENT) {
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debug("%s: device_get_supply_regulator failed: %d\n",
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__func__, ret);
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goto err;
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}
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}
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ret = phy_alloc_counts(phy, supply);
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if (ret) {
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debug("phy_alloc_counts() failed: %d\n", ret);
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goto err;
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}
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return 0;
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err:
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return ret;
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}
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int generic_phy_get_by_index(struct udevice *dev, int index,
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struct phy *phy)
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{
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return generic_phy_get_by_index_nodev(dev_ofnode(dev), index, phy);
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}
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int generic_phy_get_by_name(struct udevice *dev, const char *phy_name,
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struct phy *phy)
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{
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int index;
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debug("%s(dev=%p, name=%s, phy=%p)\n", __func__, dev, phy_name, phy);
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index = dev_read_stringlist_search(dev, "phy-names", phy_name);
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if (index < 0) {
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debug("dev_read_stringlist_search() failed: %d\n", index);
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return index;
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}
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return generic_phy_get_by_index(dev, index, phy);
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}
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int generic_phy_init(struct phy *phy)
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{
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struct phy_counts *counts;
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struct phy_ops const *ops;
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int ret;
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if (!generic_phy_valid(phy))
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return 0;
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counts = phy_get_counts(phy);
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if (counts->init_count > 0) {
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counts->init_count++;
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return 0;
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}
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ops = phy_dev_ops(phy->dev);
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if (ops->init) {
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ret = ops->init(phy);
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if (ret) {
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dev_err(phy->dev, "PHY: Failed to init %s: %d.\n",
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phy->dev->name, ret);
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return ret;
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}
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}
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counts->init_count = 1;
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return 0;
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}
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int generic_phy_reset(struct phy *phy)
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{
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struct phy_ops const *ops;
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int ret;
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if (!generic_phy_valid(phy))
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return 0;
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ops = phy_dev_ops(phy->dev);
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if (!ops->reset)
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return 0;
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ret = ops->reset(phy);
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if (ret)
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dev_err(phy->dev, "PHY: Failed to reset %s: %d.\n",
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phy->dev->name, ret);
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return ret;
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}
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int generic_phy_exit(struct phy *phy)
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{
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struct phy_counts *counts;
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struct phy_ops const *ops;
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int ret;
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if (!generic_phy_valid(phy))
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return 0;
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counts = phy_get_counts(phy);
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if (counts->init_count == 0)
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return 0;
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if (counts->init_count > 1) {
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counts->init_count--;
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return 0;
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}
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ops = phy_dev_ops(phy->dev);
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if (ops->exit) {
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ret = ops->exit(phy);
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if (ret) {
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dev_err(phy->dev, "PHY: Failed to exit %s: %d.\n",
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phy->dev->name, ret);
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return ret;
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}
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}
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counts->init_count = 0;
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return 0;
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}
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int generic_phy_power_on(struct phy *phy)
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{
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struct phy_counts *counts;
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struct phy_ops const *ops;
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int ret;
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if (!generic_phy_valid(phy))
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return 0;
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counts = phy_get_counts(phy);
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if (counts->power_on_count > 0) {
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counts->power_on_count++;
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return 0;
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}
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ret = regulator_set_enable_if_allowed(counts->supply, true);
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if (ret && ret != -ENOSYS) {
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dev_err(phy->dev, "PHY: Failed to enable regulator %s: %d.\n",
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counts->supply->name, ret);
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return ret;
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}
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ops = phy_dev_ops(phy->dev);
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if (ops->power_on) {
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ret = ops->power_on(phy);
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if (ret) {
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dev_err(phy->dev, "PHY: Failed to power on %s: %d.\n",
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phy->dev->name, ret);
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regulator_set_enable_if_allowed(counts->supply, false);
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return ret;
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}
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}
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counts->power_on_count = 1;
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return 0;
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}
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int generic_phy_power_off(struct phy *phy)
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{
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struct phy_counts *counts;
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struct phy_ops const *ops;
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int ret;
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if (!generic_phy_valid(phy))
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return 0;
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counts = phy_get_counts(phy);
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if (counts->power_on_count == 0)
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return 0;
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if (counts->power_on_count > 1) {
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counts->power_on_count--;
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return 0;
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}
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ops = phy_dev_ops(phy->dev);
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if (ops->power_off) {
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ret = ops->power_off(phy);
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if (ret) {
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dev_err(phy->dev, "PHY: Failed to power off %s: %d.\n",
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phy->dev->name, ret);
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return ret;
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}
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}
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counts->power_on_count = 0;
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ret = regulator_set_enable_if_allowed(counts->supply, false);
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if (ret && ret != -ENOSYS)
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dev_err(phy->dev, "PHY: Failed to disable regulator %s: %d.\n",
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counts->supply->name, ret);
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return 0;
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}
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int generic_phy_configure(struct phy *phy, void *params)
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{
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struct phy_ops const *ops;
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if (!generic_phy_valid(phy))
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return 0;
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ops = phy_dev_ops(phy->dev);
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return ops->configure ? ops->configure(phy, params) : 0;
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}
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int generic_phy_set_mode(struct phy *phy, enum phy_mode mode, int submode)
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{
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struct phy_ops const *ops;
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if (!generic_phy_valid(phy))
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return 0;
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ops = phy_dev_ops(phy->dev);
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return ops->set_mode ? ops->set_mode(phy, mode, submode) : 0;
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}
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int generic_phy_set_speed(struct phy *phy, int speed)
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{
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struct phy_ops const *ops;
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if (!generic_phy_valid(phy))
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return 0;
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ops = phy_dev_ops(phy->dev);
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return ops->set_speed ? ops->set_speed(phy, speed) : 0;
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}
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int generic_phy_get_bulk(struct udevice *dev, struct phy_bulk *bulk)
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{
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int i, ret, count;
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struct udevice *phydev = dev;
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bulk->count = 0;
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/* Return if no phy declared */
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if (!dev_read_prop(dev, "phys", NULL)) {
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phydev = dev->parent;
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if (!dev_read_prop(phydev, "phys", NULL)) {
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pr_err("%s : no phys property\n", __func__);
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return 0;
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}
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}
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count = dev_count_phandle_with_args(phydev, "phys", "#phy-cells", 0);
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if (count < 1) {
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pr_err("%s : no phys found %d\n", __func__, count);
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return count;
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}
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bulk->phys = devm_kcalloc(phydev, count, sizeof(struct phy), GFP_KERNEL);
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if (!bulk->phys)
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return -ENOMEM;
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for (i = 0; i < count; i++) {
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ret = generic_phy_get_by_index(phydev, i, &bulk->phys[i]);
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if (ret) {
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pr_err("Failed to get PHY%d for %s\n", i, dev->name);
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return ret;
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}
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bulk->count++;
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}
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return 0;
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}
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int generic_phy_init_bulk(struct phy_bulk *bulk)
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{
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struct phy *phys = bulk->phys;
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int i, ret;
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for (i = 0; i < bulk->count; i++) {
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ret = generic_phy_init(&phys[i]);
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if (ret) {
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pr_err("Can't init PHY%d\n", i);
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goto phys_init_err;
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}
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}
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return 0;
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phys_init_err:
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for (; i > 0; i--)
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generic_phy_exit(&phys[i - 1]);
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return ret;
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}
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int generic_phy_exit_bulk(struct phy_bulk *bulk)
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{
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struct phy *phys = bulk->phys;
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int i, ret = 0;
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for (i = 0; i < bulk->count; i++)
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ret |= generic_phy_exit(&phys[i]);
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return ret;
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}
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int generic_phy_power_on_bulk(struct phy_bulk *bulk)
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{
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struct phy *phys = bulk->phys;
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int i, ret;
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for (i = 0; i < bulk->count; i++) {
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ret = generic_phy_power_on(&phys[i]);
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if (ret) {
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pr_err("Can't power on PHY%d\n", i);
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goto phys_poweron_err;
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}
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}
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return 0;
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phys_poweron_err:
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for (; i > 0; i--)
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generic_phy_power_off(&phys[i - 1]);
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return ret;
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}
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int generic_phy_power_off_bulk(struct phy_bulk *bulk)
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{
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struct phy *phys = bulk->phys;
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int i, ret = 0;
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for (i = 0; i < bulk->count; i++)
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ret |= generic_phy_power_off(&phys[i]);
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return ret;
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}
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int generic_setup_phy(struct udevice *dev, struct phy *phy, int index)
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{
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int ret = 0;
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if (!phy)
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return 0;
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ret = generic_phy_get_by_index(dev, index, phy);
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if (ret) {
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if (ret != -ENOENT)
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return ret;
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} else {
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ret = generic_phy_init(phy);
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if (ret)
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return ret;
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ret = generic_phy_power_on(phy);
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if (ret)
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ret = generic_phy_exit(phy);
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}
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return ret;
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}
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int generic_shutdown_phy(struct phy *phy)
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{
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int ret = 0;
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if (!phy)
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return 0;
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if (generic_phy_valid(phy)) {
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ret = generic_phy_power_off(phy);
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if (ret)
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return ret;
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ret = generic_phy_exit(phy);
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}
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return ret;
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}
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UCLASS_DRIVER(phy) = {
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.id = UCLASS_PHY,
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.name = "phy",
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.pre_probe = phy_uclass_pre_probe,
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.pre_remove = phy_uclass_pre_remove,
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.per_device_auto = sizeof(struct list_head),
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};
|