mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
f26e0cca14
Each iteration of for_each_available_child_of_node() puts the previous node, but in the case of a return from the middle of the loop, there is no put, thus causing a memory leak. Hence add an of_node_put() before the return. Additionally, the local variable ports in the function qca8k_setup_mdio_bus() takes the return value of of_get_child_by_name(), which gets a node but does not put it. If the function returns without putting ports, it may cause a memory leak. Hence put ports before the mid-loop return statement, and also outside the loop after its last usage in this function. Issues found with Coccinelle. Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1160 lines
28 KiB
C
1160 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2009 Felix Fietkau <nbd@nbd.name>
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* Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (c) 2015, 2019, The Linux Foundation. All rights reserved.
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* Copyright (c) 2016 John Crispin <john@phrozen.org>
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*/
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#include <linux/module.h>
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#include <linux/phy.h>
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#include <linux/netdevice.h>
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#include <net/dsa.h>
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#include <linux/of_net.h>
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#include <linux/of_platform.h>
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#include <linux/if_bridge.h>
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#include <linux/mdio.h>
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#include <linux/gpio/consumer.h>
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#include <linux/etherdevice.h>
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#include "qca8k.h"
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#define MIB_DESC(_s, _o, _n) \
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{ \
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.size = (_s), \
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.offset = (_o), \
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.name = (_n), \
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}
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static const struct qca8k_mib_desc ar8327_mib[] = {
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MIB_DESC(1, 0x00, "RxBroad"),
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MIB_DESC(1, 0x04, "RxPause"),
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MIB_DESC(1, 0x08, "RxMulti"),
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MIB_DESC(1, 0x0c, "RxFcsErr"),
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MIB_DESC(1, 0x10, "RxAlignErr"),
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MIB_DESC(1, 0x14, "RxRunt"),
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MIB_DESC(1, 0x18, "RxFragment"),
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MIB_DESC(1, 0x1c, "Rx64Byte"),
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MIB_DESC(1, 0x20, "Rx128Byte"),
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MIB_DESC(1, 0x24, "Rx256Byte"),
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MIB_DESC(1, 0x28, "Rx512Byte"),
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MIB_DESC(1, 0x2c, "Rx1024Byte"),
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MIB_DESC(1, 0x30, "Rx1518Byte"),
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MIB_DESC(1, 0x34, "RxMaxByte"),
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MIB_DESC(1, 0x38, "RxTooLong"),
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MIB_DESC(2, 0x3c, "RxGoodByte"),
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MIB_DESC(2, 0x44, "RxBadByte"),
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MIB_DESC(1, 0x4c, "RxOverFlow"),
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MIB_DESC(1, 0x50, "Filtered"),
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MIB_DESC(1, 0x54, "TxBroad"),
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MIB_DESC(1, 0x58, "TxPause"),
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MIB_DESC(1, 0x5c, "TxMulti"),
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MIB_DESC(1, 0x60, "TxUnderRun"),
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MIB_DESC(1, 0x64, "Tx64Byte"),
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MIB_DESC(1, 0x68, "Tx128Byte"),
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MIB_DESC(1, 0x6c, "Tx256Byte"),
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MIB_DESC(1, 0x70, "Tx512Byte"),
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MIB_DESC(1, 0x74, "Tx1024Byte"),
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MIB_DESC(1, 0x78, "Tx1518Byte"),
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MIB_DESC(1, 0x7c, "TxMaxByte"),
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MIB_DESC(1, 0x80, "TxOverSize"),
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MIB_DESC(2, 0x84, "TxByte"),
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MIB_DESC(1, 0x8c, "TxCollision"),
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MIB_DESC(1, 0x90, "TxAbortCol"),
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MIB_DESC(1, 0x94, "TxMultiCol"),
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MIB_DESC(1, 0x98, "TxSingleCol"),
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MIB_DESC(1, 0x9c, "TxExcDefer"),
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MIB_DESC(1, 0xa0, "TxDefer"),
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MIB_DESC(1, 0xa4, "TxLateCol"),
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};
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/* The 32bit switch registers are accessed indirectly. To achieve this we need
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* to set the page of the register. Track the last page that was set to reduce
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* mdio writes
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*/
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static u16 qca8k_current_page = 0xffff;
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static void
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qca8k_split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
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{
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regaddr >>= 1;
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*r1 = regaddr & 0x1e;
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regaddr >>= 5;
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*r2 = regaddr & 0x7;
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regaddr >>= 3;
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*page = regaddr & 0x3ff;
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}
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static u32
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qca8k_mii_read32(struct mii_bus *bus, int phy_id, u32 regnum)
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{
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u32 val;
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int ret;
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ret = bus->read(bus, phy_id, regnum);
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if (ret >= 0) {
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val = ret;
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ret = bus->read(bus, phy_id, regnum + 1);
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val |= ret << 16;
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}
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if (ret < 0) {
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dev_err_ratelimited(&bus->dev,
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"failed to read qca8k 32bit register\n");
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return ret;
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}
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return val;
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}
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static void
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qca8k_mii_write32(struct mii_bus *bus, int phy_id, u32 regnum, u32 val)
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{
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u16 lo, hi;
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int ret;
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lo = val & 0xffff;
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hi = (u16)(val >> 16);
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ret = bus->write(bus, phy_id, regnum, lo);
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if (ret >= 0)
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ret = bus->write(bus, phy_id, regnum + 1, hi);
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if (ret < 0)
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dev_err_ratelimited(&bus->dev,
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"failed to write qca8k 32bit register\n");
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}
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static void
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qca8k_set_page(struct mii_bus *bus, u16 page)
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{
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if (page == qca8k_current_page)
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return;
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if (bus->write(bus, 0x18, 0, page) < 0)
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dev_err_ratelimited(&bus->dev,
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"failed to set qca8k page\n");
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qca8k_current_page = page;
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}
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static u32
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qca8k_read(struct qca8k_priv *priv, u32 reg)
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{
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u16 r1, r2, page;
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u32 val;
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qca8k_split_addr(reg, &r1, &r2, &page);
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mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
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qca8k_set_page(priv->bus, page);
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val = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
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mutex_unlock(&priv->bus->mdio_lock);
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return val;
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}
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static void
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qca8k_write(struct qca8k_priv *priv, u32 reg, u32 val)
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{
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u16 r1, r2, page;
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qca8k_split_addr(reg, &r1, &r2, &page);
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mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
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qca8k_set_page(priv->bus, page);
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qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val);
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mutex_unlock(&priv->bus->mdio_lock);
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}
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static u32
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qca8k_rmw(struct qca8k_priv *priv, u32 reg, u32 mask, u32 val)
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{
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u16 r1, r2, page;
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u32 ret;
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qca8k_split_addr(reg, &r1, &r2, &page);
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mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
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qca8k_set_page(priv->bus, page);
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ret = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
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ret &= ~mask;
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ret |= val;
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qca8k_mii_write32(priv->bus, 0x10 | r2, r1, ret);
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mutex_unlock(&priv->bus->mdio_lock);
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return ret;
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}
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static void
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qca8k_reg_set(struct qca8k_priv *priv, u32 reg, u32 val)
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{
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qca8k_rmw(priv, reg, 0, val);
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}
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static void
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qca8k_reg_clear(struct qca8k_priv *priv, u32 reg, u32 val)
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{
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qca8k_rmw(priv, reg, val, 0);
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}
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static int
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qca8k_regmap_read(void *ctx, uint32_t reg, uint32_t *val)
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{
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struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
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*val = qca8k_read(priv, reg);
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return 0;
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}
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static int
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qca8k_regmap_write(void *ctx, uint32_t reg, uint32_t val)
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{
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struct qca8k_priv *priv = (struct qca8k_priv *)ctx;
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qca8k_write(priv, reg, val);
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return 0;
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}
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static const struct regmap_range qca8k_readable_ranges[] = {
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regmap_reg_range(0x0000, 0x00e4), /* Global control */
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regmap_reg_range(0x0100, 0x0168), /* EEE control */
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regmap_reg_range(0x0200, 0x0270), /* Parser control */
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regmap_reg_range(0x0400, 0x0454), /* ACL */
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regmap_reg_range(0x0600, 0x0718), /* Lookup */
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regmap_reg_range(0x0800, 0x0b70), /* QM */
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regmap_reg_range(0x0c00, 0x0c80), /* PKT */
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regmap_reg_range(0x0e00, 0x0e98), /* L3 */
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regmap_reg_range(0x1000, 0x10ac), /* MIB - Port0 */
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regmap_reg_range(0x1100, 0x11ac), /* MIB - Port1 */
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regmap_reg_range(0x1200, 0x12ac), /* MIB - Port2 */
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regmap_reg_range(0x1300, 0x13ac), /* MIB - Port3 */
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regmap_reg_range(0x1400, 0x14ac), /* MIB - Port4 */
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regmap_reg_range(0x1500, 0x15ac), /* MIB - Port5 */
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regmap_reg_range(0x1600, 0x16ac), /* MIB - Port6 */
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};
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static const struct regmap_access_table qca8k_readable_table = {
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.yes_ranges = qca8k_readable_ranges,
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.n_yes_ranges = ARRAY_SIZE(qca8k_readable_ranges),
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};
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static struct regmap_config qca8k_regmap_config = {
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.reg_bits = 16,
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.val_bits = 32,
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.reg_stride = 4,
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.max_register = 0x16ac, /* end MIB - Port6 range */
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.reg_read = qca8k_regmap_read,
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.reg_write = qca8k_regmap_write,
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.rd_table = &qca8k_readable_table,
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};
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static int
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qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask)
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{
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unsigned long timeout;
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timeout = jiffies + msecs_to_jiffies(20);
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/* loop until the busy flag has cleared */
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do {
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u32 val = qca8k_read(priv, reg);
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int busy = val & mask;
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if (!busy)
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break;
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cond_resched();
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} while (!time_after_eq(jiffies, timeout));
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return time_after_eq(jiffies, timeout);
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}
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static void
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qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb)
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{
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u32 reg[4];
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int i;
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/* load the ARL table into an array */
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for (i = 0; i < 4; i++)
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reg[i] = qca8k_read(priv, QCA8K_REG_ATU_DATA0 + (i * 4));
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/* vid - 83:72 */
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fdb->vid = (reg[2] >> QCA8K_ATU_VID_S) & QCA8K_ATU_VID_M;
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/* aging - 67:64 */
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fdb->aging = reg[2] & QCA8K_ATU_STATUS_M;
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/* portmask - 54:48 */
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fdb->port_mask = (reg[1] >> QCA8K_ATU_PORT_S) & QCA8K_ATU_PORT_M;
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/* mac - 47:0 */
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fdb->mac[0] = (reg[1] >> QCA8K_ATU_ADDR0_S) & 0xff;
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fdb->mac[1] = reg[1] & 0xff;
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fdb->mac[2] = (reg[0] >> QCA8K_ATU_ADDR2_S) & 0xff;
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fdb->mac[3] = (reg[0] >> QCA8K_ATU_ADDR3_S) & 0xff;
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fdb->mac[4] = (reg[0] >> QCA8K_ATU_ADDR4_S) & 0xff;
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fdb->mac[5] = reg[0] & 0xff;
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}
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static void
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qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask, const u8 *mac,
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u8 aging)
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{
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u32 reg[3] = { 0 };
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int i;
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/* vid - 83:72 */
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reg[2] = (vid & QCA8K_ATU_VID_M) << QCA8K_ATU_VID_S;
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/* aging - 67:64 */
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reg[2] |= aging & QCA8K_ATU_STATUS_M;
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/* portmask - 54:48 */
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reg[1] = (port_mask & QCA8K_ATU_PORT_M) << QCA8K_ATU_PORT_S;
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/* mac - 47:0 */
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reg[1] |= mac[0] << QCA8K_ATU_ADDR0_S;
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reg[1] |= mac[1];
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reg[0] |= mac[2] << QCA8K_ATU_ADDR2_S;
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reg[0] |= mac[3] << QCA8K_ATU_ADDR3_S;
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reg[0] |= mac[4] << QCA8K_ATU_ADDR4_S;
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reg[0] |= mac[5];
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/* load the array into the ARL table */
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for (i = 0; i < 3; i++)
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qca8k_write(priv, QCA8K_REG_ATU_DATA0 + (i * 4), reg[i]);
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}
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static int
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qca8k_fdb_access(struct qca8k_priv *priv, enum qca8k_fdb_cmd cmd, int port)
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{
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u32 reg;
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/* Set the command and FDB index */
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reg = QCA8K_ATU_FUNC_BUSY;
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reg |= cmd;
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if (port >= 0) {
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reg |= QCA8K_ATU_FUNC_PORT_EN;
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reg |= (port & QCA8K_ATU_FUNC_PORT_M) << QCA8K_ATU_FUNC_PORT_S;
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}
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/* Write the function register triggering the table access */
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qca8k_write(priv, QCA8K_REG_ATU_FUNC, reg);
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/* wait for completion */
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if (qca8k_busy_wait(priv, QCA8K_REG_ATU_FUNC, QCA8K_ATU_FUNC_BUSY))
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return -1;
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/* Check for table full violation when adding an entry */
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if (cmd == QCA8K_FDB_LOAD) {
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reg = qca8k_read(priv, QCA8K_REG_ATU_FUNC);
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if (reg & QCA8K_ATU_FUNC_FULL)
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return -1;
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}
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return 0;
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}
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static int
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qca8k_fdb_next(struct qca8k_priv *priv, struct qca8k_fdb *fdb, int port)
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{
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int ret;
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qca8k_fdb_write(priv, fdb->vid, fdb->port_mask, fdb->mac, fdb->aging);
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ret = qca8k_fdb_access(priv, QCA8K_FDB_NEXT, port);
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if (ret >= 0)
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qca8k_fdb_read(priv, fdb);
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return ret;
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}
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static int
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qca8k_fdb_add(struct qca8k_priv *priv, const u8 *mac, u16 port_mask,
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u16 vid, u8 aging)
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{
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int ret;
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mutex_lock(&priv->reg_mutex);
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qca8k_fdb_write(priv, vid, port_mask, mac, aging);
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ret = qca8k_fdb_access(priv, QCA8K_FDB_LOAD, -1);
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mutex_unlock(&priv->reg_mutex);
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return ret;
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}
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static int
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qca8k_fdb_del(struct qca8k_priv *priv, const u8 *mac, u16 port_mask, u16 vid)
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{
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int ret;
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mutex_lock(&priv->reg_mutex);
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qca8k_fdb_write(priv, vid, port_mask, mac, 0);
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ret = qca8k_fdb_access(priv, QCA8K_FDB_PURGE, -1);
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mutex_unlock(&priv->reg_mutex);
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return ret;
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}
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static void
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qca8k_fdb_flush(struct qca8k_priv *priv)
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{
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mutex_lock(&priv->reg_mutex);
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qca8k_fdb_access(priv, QCA8K_FDB_FLUSH, -1);
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mutex_unlock(&priv->reg_mutex);
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}
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static void
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qca8k_mib_init(struct qca8k_priv *priv)
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{
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mutex_lock(&priv->reg_mutex);
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qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_FLUSH | QCA8K_MIB_BUSY);
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qca8k_busy_wait(priv, QCA8K_REG_MIB, QCA8K_MIB_BUSY);
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qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_CPU_KEEP);
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qca8k_write(priv, QCA8K_REG_MODULE_EN, QCA8K_MODULE_EN_MIB);
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mutex_unlock(&priv->reg_mutex);
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}
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static int
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qca8k_set_pad_ctrl(struct qca8k_priv *priv, int port, int mode)
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{
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u32 reg, val;
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switch (port) {
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case 0:
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reg = QCA8K_REG_PORT0_PAD_CTRL;
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break;
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case 6:
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reg = QCA8K_REG_PORT6_PAD_CTRL;
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break;
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default:
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pr_err("Can't set PAD_CTRL on port %d\n", port);
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return -EINVAL;
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}
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/* Configure a port to be directly connected to an external
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* PHY or MAC.
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*/
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switch (mode) {
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|
case PHY_INTERFACE_MODE_RGMII:
|
|
/* RGMII mode means no delay so don't enable the delay */
|
|
val = QCA8K_PORT_PAD_RGMII_EN;
|
|
qca8k_write(priv, reg, val);
|
|
break;
|
|
case PHY_INTERFACE_MODE_RGMII_ID:
|
|
/* RGMII_ID needs internal delay. This is enabled through
|
|
* PORT5_PAD_CTRL for all ports, rather than individual port
|
|
* registers
|
|
*/
|
|
qca8k_write(priv, reg,
|
|
QCA8K_PORT_PAD_RGMII_EN |
|
|
QCA8K_PORT_PAD_RGMII_TX_DELAY(QCA8K_MAX_DELAY) |
|
|
QCA8K_PORT_PAD_RGMII_RX_DELAY(QCA8K_MAX_DELAY));
|
|
qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL,
|
|
QCA8K_PORT_PAD_RGMII_RX_DELAY_EN);
|
|
break;
|
|
case PHY_INTERFACE_MODE_SGMII:
|
|
qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN);
|
|
break;
|
|
default:
|
|
pr_err("xMII mode %d not supported\n", mode);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
qca8k_port_set_status(struct qca8k_priv *priv, int port, int enable)
|
|
{
|
|
u32 mask = QCA8K_PORT_STATUS_TXMAC | QCA8K_PORT_STATUS_RXMAC;
|
|
|
|
/* Port 0 and 6 have no internal PHY */
|
|
if (port > 0 && port < 6)
|
|
mask |= QCA8K_PORT_STATUS_LINK_AUTO;
|
|
|
|
if (enable)
|
|
qca8k_reg_set(priv, QCA8K_REG_PORT_STATUS(port), mask);
|
|
else
|
|
qca8k_reg_clear(priv, QCA8K_REG_PORT_STATUS(port), mask);
|
|
}
|
|
|
|
static u32
|
|
qca8k_port_to_phy(int port)
|
|
{
|
|
/* From Andrew Lunn:
|
|
* Port 0 has no internal phy.
|
|
* Port 1 has an internal PHY at MDIO address 0.
|
|
* Port 2 has an internal PHY at MDIO address 1.
|
|
* ...
|
|
* Port 5 has an internal PHY at MDIO address 4.
|
|
* Port 6 has no internal PHY.
|
|
*/
|
|
|
|
return port - 1;
|
|
}
|
|
|
|
static int
|
|
qca8k_mdio_write(struct qca8k_priv *priv, int port, u32 regnum, u16 data)
|
|
{
|
|
u32 phy, val;
|
|
|
|
if (regnum >= QCA8K_MDIO_MASTER_MAX_REG)
|
|
return -EINVAL;
|
|
|
|
/* callee is responsible for not passing bad ports,
|
|
* but we still would like to make spills impossible.
|
|
*/
|
|
phy = qca8k_port_to_phy(port) % PHY_MAX_ADDR;
|
|
val = QCA8K_MDIO_MASTER_BUSY | QCA8K_MDIO_MASTER_EN |
|
|
QCA8K_MDIO_MASTER_WRITE | QCA8K_MDIO_MASTER_PHY_ADDR(phy) |
|
|
QCA8K_MDIO_MASTER_REG_ADDR(regnum) |
|
|
QCA8K_MDIO_MASTER_DATA(data);
|
|
|
|
qca8k_write(priv, QCA8K_MDIO_MASTER_CTRL, val);
|
|
|
|
return qca8k_busy_wait(priv, QCA8K_MDIO_MASTER_CTRL,
|
|
QCA8K_MDIO_MASTER_BUSY);
|
|
}
|
|
|
|
static int
|
|
qca8k_mdio_read(struct qca8k_priv *priv, int port, u32 regnum)
|
|
{
|
|
u32 phy, val;
|
|
|
|
if (regnum >= QCA8K_MDIO_MASTER_MAX_REG)
|
|
return -EINVAL;
|
|
|
|
/* callee is responsible for not passing bad ports,
|
|
* but we still would like to make spills impossible.
|
|
*/
|
|
phy = qca8k_port_to_phy(port) % PHY_MAX_ADDR;
|
|
val = QCA8K_MDIO_MASTER_BUSY | QCA8K_MDIO_MASTER_EN |
|
|
QCA8K_MDIO_MASTER_READ | QCA8K_MDIO_MASTER_PHY_ADDR(phy) |
|
|
QCA8K_MDIO_MASTER_REG_ADDR(regnum);
|
|
|
|
qca8k_write(priv, QCA8K_MDIO_MASTER_CTRL, val);
|
|
|
|
if (qca8k_busy_wait(priv, QCA8K_MDIO_MASTER_CTRL,
|
|
QCA8K_MDIO_MASTER_BUSY))
|
|
return -ETIMEDOUT;
|
|
|
|
val = (qca8k_read(priv, QCA8K_MDIO_MASTER_CTRL) &
|
|
QCA8K_MDIO_MASTER_DATA_MASK);
|
|
|
|
return val;
|
|
}
|
|
|
|
static int
|
|
qca8k_phy_write(struct dsa_switch *ds, int port, int regnum, u16 data)
|
|
{
|
|
struct qca8k_priv *priv = ds->priv;
|
|
|
|
return qca8k_mdio_write(priv, port, regnum, data);
|
|
}
|
|
|
|
static int
|
|
qca8k_phy_read(struct dsa_switch *ds, int port, int regnum)
|
|
{
|
|
struct qca8k_priv *priv = ds->priv;
|
|
int ret;
|
|
|
|
ret = qca8k_mdio_read(priv, port, regnum);
|
|
|
|
if (ret < 0)
|
|
return 0xffff;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
qca8k_setup_mdio_bus(struct qca8k_priv *priv)
|
|
{
|
|
u32 internal_mdio_mask = 0, external_mdio_mask = 0, reg;
|
|
struct device_node *ports, *port;
|
|
int err;
|
|
|
|
ports = of_get_child_by_name(priv->dev->of_node, "ports");
|
|
if (!ports)
|
|
return -EINVAL;
|
|
|
|
for_each_available_child_of_node(ports, port) {
|
|
err = of_property_read_u32(port, "reg", ®);
|
|
if (err) {
|
|
of_node_put(port);
|
|
of_node_put(ports);
|
|
return err;
|
|
}
|
|
|
|
if (!dsa_is_user_port(priv->ds, reg))
|
|
continue;
|
|
|
|
if (of_property_read_bool(port, "phy-handle"))
|
|
external_mdio_mask |= BIT(reg);
|
|
else
|
|
internal_mdio_mask |= BIT(reg);
|
|
}
|
|
|
|
of_node_put(ports);
|
|
if (!external_mdio_mask && !internal_mdio_mask) {
|
|
dev_err(priv->dev, "no PHYs are defined.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* The QCA8K_MDIO_MASTER_EN Bit, which grants access to PHYs through
|
|
* the MDIO_MASTER register also _disconnects_ the external MDC
|
|
* passthrough to the internal PHYs. It's not possible to use both
|
|
* configurations at the same time!
|
|
*
|
|
* Because this came up during the review process:
|
|
* If the external mdio-bus driver is capable magically disabling
|
|
* the QCA8K_MDIO_MASTER_EN and mutex/spin-locking out the qca8k's
|
|
* accessors for the time being, it would be possible to pull this
|
|
* off.
|
|
*/
|
|
if (!!external_mdio_mask && !!internal_mdio_mask) {
|
|
dev_err(priv->dev, "either internal or external mdio bus configuration is supported.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (external_mdio_mask) {
|
|
/* Make sure to disable the internal mdio bus in cases
|
|
* a dt-overlay and driver reload changed the configuration
|
|
*/
|
|
|
|
qca8k_reg_clear(priv, QCA8K_MDIO_MASTER_CTRL,
|
|
QCA8K_MDIO_MASTER_EN);
|
|
return 0;
|
|
}
|
|
|
|
priv->ops.phy_read = qca8k_phy_read;
|
|
priv->ops.phy_write = qca8k_phy_write;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
qca8k_setup(struct dsa_switch *ds)
|
|
{
|
|
struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
|
|
int ret, i, phy_mode = -1;
|
|
u32 mask;
|
|
|
|
/* Make sure that port 0 is the cpu port */
|
|
if (!dsa_is_cpu_port(ds, 0)) {
|
|
pr_err("port 0 is not the CPU port\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_init(&priv->reg_mutex);
|
|
|
|
/* Start by setting up the register mapping */
|
|
priv->regmap = devm_regmap_init(ds->dev, NULL, priv,
|
|
&qca8k_regmap_config);
|
|
if (IS_ERR(priv->regmap))
|
|
pr_warn("regmap initialization failed");
|
|
|
|
ret = qca8k_setup_mdio_bus(priv);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Initialize CPU port pad mode (xMII type, delays...) */
|
|
phy_mode = of_get_phy_mode(ds->ports[QCA8K_CPU_PORT].dn);
|
|
if (phy_mode < 0) {
|
|
pr_err("Can't find phy-mode for master device\n");
|
|
return phy_mode;
|
|
}
|
|
ret = qca8k_set_pad_ctrl(priv, QCA8K_CPU_PORT, phy_mode);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Enable CPU Port, force it to maximum bandwidth and full-duplex */
|
|
mask = QCA8K_PORT_STATUS_SPEED_1000 | QCA8K_PORT_STATUS_TXFLOW |
|
|
QCA8K_PORT_STATUS_RXFLOW | QCA8K_PORT_STATUS_DUPLEX;
|
|
qca8k_write(priv, QCA8K_REG_PORT_STATUS(QCA8K_CPU_PORT), mask);
|
|
qca8k_reg_set(priv, QCA8K_REG_GLOBAL_FW_CTRL0,
|
|
QCA8K_GLOBAL_FW_CTRL0_CPU_PORT_EN);
|
|
qca8k_port_set_status(priv, QCA8K_CPU_PORT, 1);
|
|
priv->port_sts[QCA8K_CPU_PORT].enabled = 1;
|
|
|
|
/* Enable MIB counters */
|
|
qca8k_mib_init(priv);
|
|
|
|
/* Enable QCA header mode on the cpu port */
|
|
qca8k_write(priv, QCA8K_REG_PORT_HDR_CTRL(QCA8K_CPU_PORT),
|
|
QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_TX_S |
|
|
QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_RX_S);
|
|
|
|
/* Disable forwarding by default on all ports */
|
|
for (i = 0; i < QCA8K_NUM_PORTS; i++)
|
|
qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
|
|
QCA8K_PORT_LOOKUP_MEMBER, 0);
|
|
|
|
/* Disable MAC by default on all user ports */
|
|
for (i = 1; i < QCA8K_NUM_PORTS; i++)
|
|
if (dsa_is_user_port(ds, i))
|
|
qca8k_port_set_status(priv, i, 0);
|
|
|
|
/* Forward all unknown frames to CPU port for Linux processing */
|
|
qca8k_write(priv, QCA8K_REG_GLOBAL_FW_CTRL1,
|
|
BIT(0) << QCA8K_GLOBAL_FW_CTRL1_IGMP_DP_S |
|
|
BIT(0) << QCA8K_GLOBAL_FW_CTRL1_BC_DP_S |
|
|
BIT(0) << QCA8K_GLOBAL_FW_CTRL1_MC_DP_S |
|
|
BIT(0) << QCA8K_GLOBAL_FW_CTRL1_UC_DP_S);
|
|
|
|
/* Setup connection between CPU port & user ports */
|
|
for (i = 0; i < DSA_MAX_PORTS; i++) {
|
|
/* CPU port gets connected to all user ports of the switch */
|
|
if (dsa_is_cpu_port(ds, i)) {
|
|
qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(QCA8K_CPU_PORT),
|
|
QCA8K_PORT_LOOKUP_MEMBER, dsa_user_ports(ds));
|
|
}
|
|
|
|
/* Invividual user ports get connected to CPU port only */
|
|
if (dsa_is_user_port(ds, i)) {
|
|
int shift = 16 * (i % 2);
|
|
|
|
qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
|
|
QCA8K_PORT_LOOKUP_MEMBER,
|
|
BIT(QCA8K_CPU_PORT));
|
|
|
|
/* Enable ARP Auto-learning by default */
|
|
qca8k_reg_set(priv, QCA8K_PORT_LOOKUP_CTRL(i),
|
|
QCA8K_PORT_LOOKUP_LEARN);
|
|
|
|
/* For port based vlans to work we need to set the
|
|
* default egress vid
|
|
*/
|
|
qca8k_rmw(priv, QCA8K_EGRESS_VLAN(i),
|
|
0xffff << shift, 1 << shift);
|
|
qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(i),
|
|
QCA8K_PORT_VLAN_CVID(1) |
|
|
QCA8K_PORT_VLAN_SVID(1));
|
|
}
|
|
}
|
|
|
|
/* Flush the FDB table */
|
|
qca8k_fdb_flush(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
qca8k_adjust_link(struct dsa_switch *ds, int port, struct phy_device *phy)
|
|
{
|
|
struct qca8k_priv *priv = ds->priv;
|
|
u32 reg;
|
|
|
|
/* Force fixed-link setting for CPU port, skip others. */
|
|
if (!phy_is_pseudo_fixed_link(phy))
|
|
return;
|
|
|
|
/* Set port speed */
|
|
switch (phy->speed) {
|
|
case 10:
|
|
reg = QCA8K_PORT_STATUS_SPEED_10;
|
|
break;
|
|
case 100:
|
|
reg = QCA8K_PORT_STATUS_SPEED_100;
|
|
break;
|
|
case 1000:
|
|
reg = QCA8K_PORT_STATUS_SPEED_1000;
|
|
break;
|
|
default:
|
|
dev_dbg(priv->dev, "port%d link speed %dMbps not supported.\n",
|
|
port, phy->speed);
|
|
return;
|
|
}
|
|
|
|
/* Set duplex mode */
|
|
if (phy->duplex == DUPLEX_FULL)
|
|
reg |= QCA8K_PORT_STATUS_DUPLEX;
|
|
|
|
/* Force flow control */
|
|
if (dsa_is_cpu_port(ds, port))
|
|
reg |= QCA8K_PORT_STATUS_RXFLOW | QCA8K_PORT_STATUS_TXFLOW;
|
|
|
|
/* Force link down before changing MAC options */
|
|
qca8k_port_set_status(priv, port, 0);
|
|
qca8k_write(priv, QCA8K_REG_PORT_STATUS(port), reg);
|
|
qca8k_port_set_status(priv, port, 1);
|
|
}
|
|
|
|
static void
|
|
qca8k_get_strings(struct dsa_switch *ds, int port, u32 stringset, uint8_t *data)
|
|
{
|
|
int i;
|
|
|
|
if (stringset != ETH_SS_STATS)
|
|
return;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++)
|
|
strncpy(data + i * ETH_GSTRING_LEN, ar8327_mib[i].name,
|
|
ETH_GSTRING_LEN);
|
|
}
|
|
|
|
static void
|
|
qca8k_get_ethtool_stats(struct dsa_switch *ds, int port,
|
|
uint64_t *data)
|
|
{
|
|
struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
|
|
const struct qca8k_mib_desc *mib;
|
|
u32 reg, i;
|
|
u64 hi;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++) {
|
|
mib = &ar8327_mib[i];
|
|
reg = QCA8K_PORT_MIB_COUNTER(port) + mib->offset;
|
|
|
|
data[i] = qca8k_read(priv, reg);
|
|
if (mib->size == 2) {
|
|
hi = qca8k_read(priv, reg + 4);
|
|
data[i] |= hi << 32;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
qca8k_get_sset_count(struct dsa_switch *ds, int port, int sset)
|
|
{
|
|
if (sset != ETH_SS_STATS)
|
|
return 0;
|
|
|
|
return ARRAY_SIZE(ar8327_mib);
|
|
}
|
|
|
|
static int
|
|
qca8k_set_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *eee)
|
|
{
|
|
struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
|
|
u32 lpi_en = QCA8K_REG_EEE_CTRL_LPI_EN(port);
|
|
u32 reg;
|
|
|
|
mutex_lock(&priv->reg_mutex);
|
|
reg = qca8k_read(priv, QCA8K_REG_EEE_CTRL);
|
|
if (eee->eee_enabled)
|
|
reg |= lpi_en;
|
|
else
|
|
reg &= ~lpi_en;
|
|
qca8k_write(priv, QCA8K_REG_EEE_CTRL, reg);
|
|
mutex_unlock(&priv->reg_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
qca8k_get_mac_eee(struct dsa_switch *ds, int port, struct ethtool_eee *e)
|
|
{
|
|
/* Nothing to do on the port's MAC */
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
qca8k_port_stp_state_set(struct dsa_switch *ds, int port, u8 state)
|
|
{
|
|
struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
|
|
u32 stp_state;
|
|
|
|
switch (state) {
|
|
case BR_STATE_DISABLED:
|
|
stp_state = QCA8K_PORT_LOOKUP_STATE_DISABLED;
|
|
break;
|
|
case BR_STATE_BLOCKING:
|
|
stp_state = QCA8K_PORT_LOOKUP_STATE_BLOCKING;
|
|
break;
|
|
case BR_STATE_LISTENING:
|
|
stp_state = QCA8K_PORT_LOOKUP_STATE_LISTENING;
|
|
break;
|
|
case BR_STATE_LEARNING:
|
|
stp_state = QCA8K_PORT_LOOKUP_STATE_LEARNING;
|
|
break;
|
|
case BR_STATE_FORWARDING:
|
|
default:
|
|
stp_state = QCA8K_PORT_LOOKUP_STATE_FORWARD;
|
|
break;
|
|
}
|
|
|
|
qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
|
|
QCA8K_PORT_LOOKUP_STATE_MASK, stp_state);
|
|
}
|
|
|
|
static int
|
|
qca8k_port_bridge_join(struct dsa_switch *ds, int port, struct net_device *br)
|
|
{
|
|
struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
|
|
int port_mask = BIT(QCA8K_CPU_PORT);
|
|
int i;
|
|
|
|
for (i = 1; i < QCA8K_NUM_PORTS; i++) {
|
|
if (dsa_to_port(ds, i)->bridge_dev != br)
|
|
continue;
|
|
/* Add this port to the portvlan mask of the other ports
|
|
* in the bridge
|
|
*/
|
|
qca8k_reg_set(priv,
|
|
QCA8K_PORT_LOOKUP_CTRL(i),
|
|
BIT(port));
|
|
if (i != port)
|
|
port_mask |= BIT(i);
|
|
}
|
|
/* Add all other ports to this ports portvlan mask */
|
|
qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
|
|
QCA8K_PORT_LOOKUP_MEMBER, port_mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
qca8k_port_bridge_leave(struct dsa_switch *ds, int port, struct net_device *br)
|
|
{
|
|
struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
|
|
int i;
|
|
|
|
for (i = 1; i < QCA8K_NUM_PORTS; i++) {
|
|
if (dsa_to_port(ds, i)->bridge_dev != br)
|
|
continue;
|
|
/* Remove this port to the portvlan mask of the other ports
|
|
* in the bridge
|
|
*/
|
|
qca8k_reg_clear(priv,
|
|
QCA8K_PORT_LOOKUP_CTRL(i),
|
|
BIT(port));
|
|
}
|
|
|
|
/* Set the cpu port to be the only one in the portvlan mask of
|
|
* this port
|
|
*/
|
|
qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port),
|
|
QCA8K_PORT_LOOKUP_MEMBER, BIT(QCA8K_CPU_PORT));
|
|
}
|
|
|
|
static int
|
|
qca8k_port_enable(struct dsa_switch *ds, int port,
|
|
struct phy_device *phy)
|
|
{
|
|
struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
|
|
|
|
qca8k_port_set_status(priv, port, 1);
|
|
priv->port_sts[port].enabled = 1;
|
|
|
|
phy_support_asym_pause(phy);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
qca8k_port_disable(struct dsa_switch *ds, int port)
|
|
{
|
|
struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
|
|
|
|
qca8k_port_set_status(priv, port, 0);
|
|
priv->port_sts[port].enabled = 0;
|
|
}
|
|
|
|
static int
|
|
qca8k_port_fdb_insert(struct qca8k_priv *priv, const u8 *addr,
|
|
u16 port_mask, u16 vid)
|
|
{
|
|
/* Set the vid to the port vlan id if no vid is set */
|
|
if (!vid)
|
|
vid = 1;
|
|
|
|
return qca8k_fdb_add(priv, addr, port_mask, vid,
|
|
QCA8K_ATU_STATUS_STATIC);
|
|
}
|
|
|
|
static int
|
|
qca8k_port_fdb_add(struct dsa_switch *ds, int port,
|
|
const unsigned char *addr, u16 vid)
|
|
{
|
|
struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
|
|
u16 port_mask = BIT(port);
|
|
|
|
return qca8k_port_fdb_insert(priv, addr, port_mask, vid);
|
|
}
|
|
|
|
static int
|
|
qca8k_port_fdb_del(struct dsa_switch *ds, int port,
|
|
const unsigned char *addr, u16 vid)
|
|
{
|
|
struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
|
|
u16 port_mask = BIT(port);
|
|
|
|
if (!vid)
|
|
vid = 1;
|
|
|
|
return qca8k_fdb_del(priv, addr, port_mask, vid);
|
|
}
|
|
|
|
static int
|
|
qca8k_port_fdb_dump(struct dsa_switch *ds, int port,
|
|
dsa_fdb_dump_cb_t *cb, void *data)
|
|
{
|
|
struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
|
|
struct qca8k_fdb _fdb = { 0 };
|
|
int cnt = QCA8K_NUM_FDB_RECORDS;
|
|
bool is_static;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&priv->reg_mutex);
|
|
while (cnt-- && !qca8k_fdb_next(priv, &_fdb, port)) {
|
|
if (!_fdb.aging)
|
|
break;
|
|
is_static = (_fdb.aging == QCA8K_ATU_STATUS_STATIC);
|
|
ret = cb(_fdb.mac, _fdb.vid, is_static, data);
|
|
if (ret)
|
|
break;
|
|
}
|
|
mutex_unlock(&priv->reg_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum dsa_tag_protocol
|
|
qca8k_get_tag_protocol(struct dsa_switch *ds, int port)
|
|
{
|
|
return DSA_TAG_PROTO_QCA;
|
|
}
|
|
|
|
static const struct dsa_switch_ops qca8k_switch_ops = {
|
|
.get_tag_protocol = qca8k_get_tag_protocol,
|
|
.setup = qca8k_setup,
|
|
.adjust_link = qca8k_adjust_link,
|
|
.get_strings = qca8k_get_strings,
|
|
.get_ethtool_stats = qca8k_get_ethtool_stats,
|
|
.get_sset_count = qca8k_get_sset_count,
|
|
.get_mac_eee = qca8k_get_mac_eee,
|
|
.set_mac_eee = qca8k_set_mac_eee,
|
|
.port_enable = qca8k_port_enable,
|
|
.port_disable = qca8k_port_disable,
|
|
.port_stp_state_set = qca8k_port_stp_state_set,
|
|
.port_bridge_join = qca8k_port_bridge_join,
|
|
.port_bridge_leave = qca8k_port_bridge_leave,
|
|
.port_fdb_add = qca8k_port_fdb_add,
|
|
.port_fdb_del = qca8k_port_fdb_del,
|
|
.port_fdb_dump = qca8k_port_fdb_dump,
|
|
};
|
|
|
|
static int
|
|
qca8k_sw_probe(struct mdio_device *mdiodev)
|
|
{
|
|
struct qca8k_priv *priv;
|
|
u32 id;
|
|
|
|
/* allocate the private data struct so that we can probe the switches
|
|
* ID register
|
|
*/
|
|
priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
priv->bus = mdiodev->bus;
|
|
priv->dev = &mdiodev->dev;
|
|
|
|
priv->reset_gpio = devm_gpiod_get_optional(priv->dev, "reset",
|
|
GPIOD_ASIS);
|
|
if (IS_ERR(priv->reset_gpio))
|
|
return PTR_ERR(priv->reset_gpio);
|
|
|
|
if (priv->reset_gpio) {
|
|
gpiod_set_value_cansleep(priv->reset_gpio, 1);
|
|
/* The active low duration must be greater than 10 ms
|
|
* and checkpatch.pl wants 20 ms.
|
|
*/
|
|
msleep(20);
|
|
gpiod_set_value_cansleep(priv->reset_gpio, 0);
|
|
}
|
|
|
|
/* read the switches ID register */
|
|
id = qca8k_read(priv, QCA8K_REG_MASK_CTRL);
|
|
id >>= QCA8K_MASK_CTRL_ID_S;
|
|
id &= QCA8K_MASK_CTRL_ID_M;
|
|
if (id != QCA8K_ID_QCA8337)
|
|
return -ENODEV;
|
|
|
|
priv->ds = dsa_switch_alloc(&mdiodev->dev, DSA_MAX_PORTS);
|
|
if (!priv->ds)
|
|
return -ENOMEM;
|
|
|
|
priv->ds->priv = priv;
|
|
priv->ops = qca8k_switch_ops;
|
|
priv->ds->ops = &priv->ops;
|
|
mutex_init(&priv->reg_mutex);
|
|
dev_set_drvdata(&mdiodev->dev, priv);
|
|
|
|
return dsa_register_switch(priv->ds);
|
|
}
|
|
|
|
static void
|
|
qca8k_sw_remove(struct mdio_device *mdiodev)
|
|
{
|
|
struct qca8k_priv *priv = dev_get_drvdata(&mdiodev->dev);
|
|
int i;
|
|
|
|
for (i = 0; i < QCA8K_NUM_PORTS; i++)
|
|
qca8k_port_set_status(priv, i, 0);
|
|
|
|
dsa_unregister_switch(priv->ds);
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static void
|
|
qca8k_set_pm(struct qca8k_priv *priv, int enable)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < QCA8K_NUM_PORTS; i++) {
|
|
if (!priv->port_sts[i].enabled)
|
|
continue;
|
|
|
|
qca8k_port_set_status(priv, i, enable);
|
|
}
|
|
}
|
|
|
|
static int qca8k_suspend(struct device *dev)
|
|
{
|
|
struct qca8k_priv *priv = dev_get_drvdata(dev);
|
|
|
|
qca8k_set_pm(priv, 0);
|
|
|
|
return dsa_switch_suspend(priv->ds);
|
|
}
|
|
|
|
static int qca8k_resume(struct device *dev)
|
|
{
|
|
struct qca8k_priv *priv = dev_get_drvdata(dev);
|
|
|
|
qca8k_set_pm(priv, 1);
|
|
|
|
return dsa_switch_resume(priv->ds);
|
|
}
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
|
|
static SIMPLE_DEV_PM_OPS(qca8k_pm_ops,
|
|
qca8k_suspend, qca8k_resume);
|
|
|
|
static const struct of_device_id qca8k_of_match[] = {
|
|
{ .compatible = "qca,qca8334" },
|
|
{ .compatible = "qca,qca8337" },
|
|
{ /* sentinel */ },
|
|
};
|
|
|
|
static struct mdio_driver qca8kmdio_driver = {
|
|
.probe = qca8k_sw_probe,
|
|
.remove = qca8k_sw_remove,
|
|
.mdiodrv.driver = {
|
|
.name = "qca8k",
|
|
.of_match_table = qca8k_of_match,
|
|
.pm = &qca8k_pm_ops,
|
|
},
|
|
};
|
|
|
|
mdio_module_driver(qca8kmdio_driver);
|
|
|
|
MODULE_AUTHOR("Mathieu Olivari, John Crispin <john@phrozen.org>");
|
|
MODULE_DESCRIPTION("Driver for QCA8K ethernet switch family");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:qca8k");
|