From patchwork Fri May 29 01:42:16 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [1/7] net: dsa: add new driver for ar8xxx family From: Mathieu Olivari X-Patchwork-Id: 477523 X-Patchwork-Delegate: davem@davemloft.net Message-Id: <1432863742-18427-2-git-send-email-mathieu@codeaurora.org> To: robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, davem@davemloft.net, mathieu@codeaurora.org, andrew@lunn.ch, f.fainelli@gmail.com, linux@roeck-us.net, gang.chen.5i5j@gmail.com, jiri@resnulli.us, leitec@staticky.com, fabf@skynet.be, alexander.h.duyck@intel.com, pavel.nakonechny@skitlab.ru, joe@perches.com, sfeldma@gmail.com, nbd@nbd.name, juhosg@openwrt.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Date: Thu, 28 May 2015 18:42:16 -0700 This patch contains initial init & registration code for QCA8337. It will detect a QCA8337 switch, if present and declared in DT/platform. Each port will be represented through a standalone net_device interface, as for other DSA switches. CPU can communicate with any of the ports by setting an IP@ on ethN interface. Ports cannot communicate with each other just yet. Link status will be reported through polling, and we don't use any encapsulation. Signed-off-by: Mathieu Olivari --- drivers/net/dsa/Kconfig | 7 ++ drivers/net/dsa/Makefile | 1 + drivers/net/dsa/ar8xxx.c | 303 +++++++++++++++++++++++++++++++++++++++++++++++ drivers/net/dsa/ar8xxx.h | 82 +++++++++++++ net/dsa/dsa.c | 1 + 5 files changed, 394 insertions(+) create mode 100644 drivers/net/dsa/ar8xxx.c create mode 100644 drivers/net/dsa/ar8xxx.h --- a/drivers/net/dsa/Kconfig +++ b/drivers/net/dsa/Kconfig @@ -65,4 +65,13 @@ config NET_DSA_BCM_SF2 This enables support for the Broadcom Starfighter 2 Ethernet switch chips. +config NET_DSA_AR8XXX + tristate "Qualcomm Atheros AR8XXX Ethernet switch family support" + depends on NET_DSA + select NET_DSA_TAG_QCA + select REGMAP + ---help--- + This enables support for the Qualcomm Atheros AR8XXX Ethernet + switch chips. + endmenu --- a/drivers/net/dsa/Makefile +++ b/drivers/net/dsa/Makefile @@ -14,3 +14,4 @@ ifdef CONFIG_NET_DSA_MV88E6171 mv88e6xxx_drv-y += mv88e6171.o endif obj-$(CONFIG_NET_DSA_BCM_SF2) += bcm_sf2.o +obj-$(CONFIG_NET_DSA_AR8XXX) += ar8xxx.o --- /dev/null +++ b/drivers/net/dsa/ar8xxx.c @@ -0,0 +1,529 @@ +/* + * Copyright (C) 2009 Felix Fietkau + * Copyright (C) 2011-2012 Gabor Juhos + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "ar8xxx.h" + +#define MIB_DESC(_s, _o, _n) \ + { \ + .size = (_s), \ + .offset = (_o), \ + .name = (_n), \ + } + +static const struct ar8xxx_mib_desc ar8327_mib[] = { + MIB_DESC(1, 0x00, "RxBroad"), + MIB_DESC(1, 0x04, "RxPause"), + MIB_DESC(1, 0x08, "RxMulti"), + MIB_DESC(1, 0x0c, "RxFcsErr"), + MIB_DESC(1, 0x10, "RxAlignErr"), + MIB_DESC(1, 0x14, "RxRunt"), + MIB_DESC(1, 0x18, "RxFragment"), + MIB_DESC(1, 0x1c, "Rx64Byte"), + MIB_DESC(1, 0x20, "Rx128Byte"), + MIB_DESC(1, 0x24, "Rx256Byte"), + MIB_DESC(1, 0x28, "Rx512Byte"), + MIB_DESC(1, 0x2c, "Rx1024Byte"), + MIB_DESC(1, 0x30, "Rx1518Byte"), + MIB_DESC(1, 0x34, "RxMaxByte"), + MIB_DESC(1, 0x38, "RxTooLong"), + MIB_DESC(2, 0x3c, "RxGoodByte"), + MIB_DESC(2, 0x44, "RxBadByte"), + MIB_DESC(1, 0x4c, "RxOverFlow"), + MIB_DESC(1, 0x50, "Filtered"), + MIB_DESC(1, 0x54, "TxBroad"), + MIB_DESC(1, 0x58, "TxPause"), + MIB_DESC(1, 0x5c, "TxMulti"), + MIB_DESC(1, 0x60, "TxUnderRun"), + MIB_DESC(1, 0x64, "Tx64Byte"), + MIB_DESC(1, 0x68, "Tx128Byte"), + MIB_DESC(1, 0x6c, "Tx256Byte"), + MIB_DESC(1, 0x70, "Tx512Byte"), + MIB_DESC(1, 0x74, "Tx1024Byte"), + MIB_DESC(1, 0x78, "Tx1518Byte"), + MIB_DESC(1, 0x7c, "TxMaxByte"), + MIB_DESC(1, 0x80, "TxOverSize"), + MIB_DESC(2, 0x84, "TxByte"), + MIB_DESC(1, 0x8c, "TxCollision"), + MIB_DESC(1, 0x90, "TxAbortCol"), + MIB_DESC(1, 0x94, "TxMultiCol"), + MIB_DESC(1, 0x98, "TxSingleCol"), + MIB_DESC(1, 0x9c, "TxExcDefer"), + MIB_DESC(1, 0xa0, "TxDefer"), + MIB_DESC(1, 0xa4, "TxLateCol"), +}; + +u32 +ar8xxx_mii_read32(struct mii_bus *bus, int phy_id, int regnum) +{ + u16 lo, hi; + + lo = bus->read(bus, phy_id, regnum); + hi = bus->read(bus, phy_id, regnum + 1); + + return (hi << 16) | lo; +} + +void +ar8xxx_mii_write32(struct mii_bus *bus, int phy_id, int regnum, u32 val) +{ + u16 lo, hi; + + lo = val & 0xffff; + hi = (u16)(val >> 16); + + bus->write(bus, phy_id, regnum, lo); + bus->write(bus, phy_id, regnum + 1, hi); +} + +u32 ar8xxx_read(struct dsa_switch *ds, int reg) +{ + struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->master_dev); + u16 r1, r2, page; + u32 val; + + split_addr((u32)reg, &r1, &r2, &page); + + mutex_lock(&bus->mdio_lock); + + bus->write(bus, 0x18, 0, page); + wait_for_page_switch(); + val = ar8xxx_mii_read32(bus, 0x10 | r2, r1); + + mutex_unlock(&bus->mdio_lock); + + return val; +} + +void ar8xxx_write(struct dsa_switch *ds, int reg, u32 val) +{ + struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->master_dev); + u16 r1, r2, page; + + split_addr((u32)reg, &r1, &r2, &page); + + mutex_lock(&bus->mdio_lock); + + bus->write(bus, 0x18, 0, page); + wait_for_page_switch(); + ar8xxx_mii_write32(bus, 0x10 | r2, r1, val); + + mutex_unlock(&bus->mdio_lock); +} + +u32 +ar8xxx_rmw(struct dsa_switch *ds, int reg, u32 mask, u32 val) +{ + struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->master_dev); + u16 r1, r2, page; + u32 ret; + + split_addr((u32)reg, &r1, &r2, &page); + + mutex_lock(&bus->mdio_lock); + + bus->write(bus, 0x18, 0, page); + wait_for_page_switch(); + + ret = ar8xxx_mii_read32(bus, 0x10 | r2, r1); + ret &= ~mask; + ret |= val; + ar8xxx_mii_write32(bus, 0x10 | r2, r1, ret); + + mutex_unlock(&bus->mdio_lock); + + return ret; +} + +static char *ar8xxx_probe(struct device *host_dev, int sw_addr) +{ + struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev); + u32 phy_id; + + if (!bus) + return NULL; + + /* sw_addr is irrelevant as the switch occupies the MDIO bus from + * addresses 0 to 4 (PHYs) and 16-23 (for MDIO 32bits protocol). So + * we'll probe address 0 to see if we see the right switch family. + */ + phy_id = mdiobus_read(bus, 0, MII_PHYSID1) << 16; + phy_id |= mdiobus_read(bus, 0, MII_PHYSID2); + + switch (phy_id) { + case PHY_ID_QCA8337: + return "QCA8337"; + default: + return NULL; + } +} + +static int ar8xxx_regmap_read(void *ctx, uint32_t reg, uint32_t *val) +{ + struct dsa_switch *ds = (struct dsa_switch *)ctx; + + *val = ar8xxx_read(ds, reg); + + return 0; +} + +static int ar8xxx_regmap_write(void *ctx, uint32_t reg, uint32_t val) +{ + struct dsa_switch *ds = (struct dsa_switch *)ctx; + + ar8xxx_write(ds, reg, val); + + return 0; +} + +static const struct regmap_range ar8xxx_readable_ranges[] = { + regmap_reg_range(0x0000, 0x00e4), /* Global control */ + regmap_reg_range(0x0100, 0x0168), /* EEE control */ + regmap_reg_range(0x0200, 0x0270), /* Parser control */ + regmap_reg_range(0x0400, 0x0454), /* ACL */ + regmap_reg_range(0x0600, 0x0718), /* Lookup */ + regmap_reg_range(0x0800, 0x0b70), /* QM */ + regmap_reg_range(0x0C00, 0x0c80), /* PKT */ + regmap_reg_range(0x1000, 0x10ac), /* MIB - Port0 */ + regmap_reg_range(0x1100, 0x11ac), /* MIB - Port1 */ + regmap_reg_range(0x1200, 0x12ac), /* MIB - Port2 */ + regmap_reg_range(0x1300, 0x13ac), /* MIB - Port3 */ + regmap_reg_range(0x1400, 0x14ac), /* MIB - Port4 */ + regmap_reg_range(0x1500, 0x15ac), /* MIB - Port5 */ + regmap_reg_range(0x1600, 0x16ac), /* MIB - Port6 */ + +}; + +static struct regmap_access_table ar8xxx_readable_table = { + .yes_ranges = ar8xxx_readable_ranges, + .n_yes_ranges = ARRAY_SIZE(ar8xxx_readable_ranges), +}; + +struct regmap_config ar8xxx_regmap_config = { + .reg_bits = 16, + .val_bits = 32, + .reg_stride = 4, + .max_register = 0x16ac, /* end MIB - Port6 range */ + .reg_read = ar8xxx_regmap_read, + .reg_write = ar8xxx_regmap_write, + .rd_table = &ar8xxx_readable_table, +}; + +static int ar8xxx_set_pad_ctrl(struct dsa_switch *ds, int port, int mode) +{ + int reg; + + switch (port) { + case 0: + reg = AR8327_REG_PORT0_PAD_CTRL; + break; + case 6: + reg = AR8327_REG_PORT6_PAD_CTRL; + break; + default: + pr_err("Can't set PAD_CTRL on port %d\n", port); + return -EINVAL; + } + + /* DSA only supports 1 CPU port for now, so we'll take the assumption + * that P0 is connected to the CPU master_dev. + */ + switch (mode) { + case PHY_INTERFACE_MODE_RGMII: + ar8xxx_write(ds, reg, + AR8327_PORT_PAD_RGMII_EN | + AR8327_PORT_PAD_RGMII_TX_DELAY(3) | + AR8327_PORT_PAD_RGMII_RX_DELAY(3)); + + /* According to the datasheet, RGMII delay is enabled through + * PORT5_PAD_CTRL for all ports, rather than individual port + * registers + */ + ar8xxx_write(ds, AR8327_REG_PORT5_PAD_CTRL, + AR8327_PORT_PAD_RGMII_RX_DELAY_EN); + break; + case PHY_INTERFACE_MODE_SGMII: + ar8xxx_write(ds, reg, AR8327_PORT_PAD_SGMII_EN); + break; + default: + pr_err("xMII mode %d not supported\n", mode); + return -EINVAL; + } + + return 0; +} + +static int ar8xxx_of_setup(struct dsa_switch *ds) +{ + struct device_node *dn = ds->pd->of_node; + const char *s_phymode; + int ret, mode; + u32 phy_id, ctrl; + + /* If port6-phy-mode property exists, configure it accordingly */ + if (!of_property_read_string(dn, "qca,port6-phy-mode", &s_phymode)) { + for (mode = 0; mode < PHY_INTERFACE_MODE_MAX; mode++) + if (!strcasecmp(s_phymode, phy_modes(mode))) + break; + + if (mode == PHY_INTERFACE_MODE_MAX) + pr_err("Unknown phy-mode: \"%s\"\n", s_phymode); + + ret = ar8xxx_set_pad_ctrl(ds, 6, mode); + if (ret < 0) + return ret; + } + + /* If a phy ID is specified for PORT6 mac, connect them together */ + if (!of_property_read_u32(dn, "qca,port6-phy-id", &phy_id)) { + ar8xxx_rmw(ds, AR8327_PORT_LOOKUP_CTRL(6), + AR8327_PORT_LOOKUP_MEMBER, BIT(phy_to_port(phy_id))); + ar8xxx_rmw(ds, AR8327_PORT_LOOKUP_CTRL(phy_to_port(phy_id)), + AR8327_PORT_LOOKUP_MEMBER, BIT(6)); + + /* We want the switch to be pass-through and act like a PHY on + * these ports. So BC/MC/UC & IGMP frames need to be accepted + */ + ctrl = BIT(phy_to_port(phy_id)) | BIT(6); + ar8xxx_reg_set(ds, AR8327_REG_GLOBAL_FW_CTRL1, + ctrl << AR8327_GLOBAL_FW_CTRL1_IGMP_DP_S | + ctrl << AR8327_GLOBAL_FW_CTRL1_BC_DP_S | + ctrl << AR8327_GLOBAL_FW_CTRL1_MC_DP_S | + ctrl << AR8327_GLOBAL_FW_CTRL1_UC_DP_S); + } + + return 0; +} + +static int ar8xxx_setup(struct dsa_switch *ds) +{ + struct ar8xxx_priv *priv = ds_to_priv(ds); + struct net_device *netdev = ds->dst->pd->of_netdev; + int ret, i, phy_mode; + + /* Start by setting up the register mapping */ + priv->regmap = devm_regmap_init(ds->master_dev, NULL, ds, + &ar8xxx_regmap_config); + + if (IS_ERR(priv->regmap)) + pr_warn("regmap initialization failed"); + + /* Initialize CPU port pad mode (xMII type, delays...) */ + phy_mode = of_get_phy_mode(netdev->dev.parent->of_node); + if (phy_mode < 0) { + pr_err("Can't find phy-mode for master device\n"); + return phy_mode; + } + + ret = ar8xxx_set_pad_ctrl(ds, 0, phy_mode); + if (ret < 0) + return ret; + + /* Enable CPU Port */ + ar8xxx_reg_set(ds, AR8327_REG_GLOBAL_FW_CTRL0, + AR8327_GLOBAL_FW_CTRL0_CPU_PORT_EN); + + /* Enable MIB counters */ + ar8xxx_reg_set(ds, AR8327_REG_MIB, AR8327_MIB_CPU_KEEP); + ar8xxx_write(ds, AR8327_REG_MODULE_EN, AR8327_MODULE_EN_MIB); + + /* Enable QCA header mode on Port 0 */ + ar8xxx_write(ds, AR8327_REG_PORT_HDR_CTRL(0), + AR8327_PORT_HDR_CTRL_ALL << AR8327_PORT_HDR_CTRL_TX_S | + AR8327_PORT_HDR_CTRL_ALL << AR8327_PORT_HDR_CTRL_RX_S); + + /* Disable forwarding by default on all ports */ + for (i = 0; i < AR8327_NUM_PORTS; i++) + ar8xxx_rmw(ds, AR8327_PORT_LOOKUP_CTRL(i), + AR8327_PORT_LOOKUP_MEMBER, 0); + + /* Forward all unknown frames to CPU port for Linux processing */ + ar8xxx_write(ds, AR8327_REG_GLOBAL_FW_CTRL1, + BIT(0) << AR8327_GLOBAL_FW_CTRL1_IGMP_DP_S | + BIT(0) << AR8327_GLOBAL_FW_CTRL1_BC_DP_S | + BIT(0) << AR8327_GLOBAL_FW_CTRL1_MC_DP_S | + BIT(0) << AR8327_GLOBAL_FW_CTRL1_UC_DP_S); + + /* Setup connection between CPU ports & PHYs */ + for (i = 0; i < DSA_MAX_PORTS; i++) { + /* CPU port gets connected to all PHYs in the switch */ + if (dsa_is_cpu_port(ds, i)) { + ar8xxx_rmw(ds, AR8327_PORT_LOOKUP_CTRL(0), + AR8327_PORT_LOOKUP_MEMBER, + ds->phys_port_mask << 1); + } + + /* Invividual PHYs gets connected to CPU port only */ + if (ds->phys_port_mask & BIT(i)) { + int phy = phy_to_port(i); + + ar8xxx_rmw(ds, AR8327_PORT_LOOKUP_CTRL(phy), + AR8327_PORT_LOOKUP_MEMBER, BIT(0)); + + /* Disable Auto-learning by default so the switch + * doesn't try to forward the frame to another port + */ + ar8xxx_reg_clear(ds, AR8327_PORT_LOOKUP_CTRL(phy), + AR8327_PORT_LOOKUP_LEARN); + } + } + + ret = ar8xxx_of_setup(ds); + if (ret < 0) + return ret; + + return 0; +} + +static int ar8xxx_set_addr(struct dsa_switch *ds, u8 *addr) +{ + return 0; +} + +static int ar8xxx_phy_read(struct dsa_switch *ds, int phy, int regnum) +{ + struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->master_dev); + + return mdiobus_read(bus, phy, regnum); +} + +static int +ar8xxx_phy_write(struct dsa_switch *ds, int phy, int regnum, u16 val) +{ + struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->master_dev); + + return mdiobus_write(bus, phy, regnum, val); +} + +static void ar8xxx_get_strings(struct dsa_switch *ds, int phy, uint8_t *data) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++) { + strncpy(data + i * ETH_GSTRING_LEN, ar8327_mib[i].name, + ETH_GSTRING_LEN); + } +} + +static void ar8xxx_get_ethtool_stats(struct dsa_switch *ds, int phy, + uint64_t *data) +{ + const struct ar8xxx_mib_desc *mib; + uint32_t reg, i, port; + u64 hi; + + port = phy_to_port(phy); + + for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++) { + mib = &ar8327_mib[i]; + reg = AR8327_PORT_MIB_COUNTER(port) + mib->offset; + + data[i] = ar8xxx_read(ds, reg); + if (mib->size == 2) { + hi = ar8xxx_read(ds, reg + 4); + data[i] |= hi << 32; + } + } +} + +static int ar8xxx_get_sset_count(struct dsa_switch *ds) +{ + return ARRAY_SIZE(ar8327_mib); +} + +static void ar8xxx_poll_link(struct dsa_switch *ds) +{ + int i = 0; + struct net_device *dev; + + while ((dev = ds->ports[i++]) != NULL) { + u32 status; + int link; + int speed; + int duplex; + + status = ar8xxx_read(ds, AR8327_REG_PORT_STATUS(i)); + link = !!(status & AR8XXX_PORT_STATUS_LINK_UP); + duplex = !!(status & AR8XXX_PORT_STATUS_DUPLEX); + + switch (status & AR8XXX_PORT_STATUS_SPEED) { + case AR8XXX_PORT_SPEED_10M: + speed = 10; + break; + case AR8XXX_PORT_SPEED_100M: + speed = 100; + break; + case AR8XXX_PORT_SPEED_1000M: + speed = 1000; + break; + default: + speed = 0; + } + + if (!link) { + /* This poll happens every ~1s, so we don't want to + * print the status every time. Only when the device + * transitions from Link UP to Link DOWN + */ + if (netif_carrier_ok(dev)) + netif_carrier_off(dev); + continue; + } else { + /* Same thing here. But we detect a Link UP event */ + if (!netif_carrier_ok(dev)) + netif_carrier_on(dev); + continue; + } + } +} + +static struct dsa_switch_driver ar8xxx_switch_driver = { + .tag_protocol = DSA_TAG_PROTO_QCA, + .priv_size = sizeof(struct ar8xxx_priv), + .probe = ar8xxx_probe, + .setup = ar8xxx_setup, + .set_addr = ar8xxx_set_addr, + .poll_link = ar8xxx_poll_link, + .phy_read = ar8xxx_phy_read, + .phy_write = ar8xxx_phy_write, + .get_strings = ar8xxx_get_strings, + .get_ethtool_stats = ar8xxx_get_ethtool_stats, + .get_sset_count = ar8xxx_get_sset_count, +}; + +static int __init ar8xxx_init(void) +{ + register_switch_driver(&ar8xxx_switch_driver); + return 0; +} +module_init(ar8xxx_init); + +static void __exit ar8xxx_cleanup(void) +{ + unregister_switch_driver(&ar8xxx_switch_driver); +} +module_exit(ar8xxx_cleanup); + +MODULE_AUTHOR("Mathieu Olivari "); +MODULE_DESCRIPTION("Driver for AR8XXX ethernet switch family"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:ar8xxx"); --- /dev/null +++ b/drivers/net/dsa/ar8xxx.h @@ -0,0 +1,156 @@ +/* + * Copyright (C) 2009 Felix Fietkau + * Copyright (C) 2011-2012 Gabor Juhos + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __AR8XXX_H +#define __AR8XXX_H + +#include +#include + +struct ar8xxx_priv { + struct regmap *regmap; +}; + +struct ar8xxx_mib_desc { + unsigned int size; + unsigned int offset; + const char *name; +}; + +#define AR8327_NUM_PORTS 7 + +#define PHY_ID_QCA8337 0x004dd036 + +#define AR8327_REG_PORT0_PAD_CTRL 0x004 +#define AR8327_REG_PORT5_PAD_CTRL 0x008 +#define AR8327_REG_PORT6_PAD_CTRL 0x00c +#define AR8327_PORT_PAD_RGMII_EN BIT(26) +#define AR8327_PORT_PAD_RGMII_TX_DELAY(x) ((0x8 + (x & 0x3)) << 22) +#define AR8327_PORT_PAD_RGMII_RX_DELAY(x) ((0x10 + (x & 0x3)) << 20) +#define AR8327_PORT_PAD_RGMII_RX_DELAY_EN BIT(24) +#define AR8327_PORT_PAD_SGMII_EN BIT(7) + +#define AR8327_REG_MODULE_EN 0x030 +#define AR8327_MODULE_EN_MIB BIT(0) +#define AR8327_MODULE_EN_ACL BIT(1) +#define AR8327_MODULE_EN_L3 BIT(2) + +#define AR8327_REG_MIB 0x034 +#define AR8327_MIB_CPU_KEEP BIT(20) + +#define AR8327_REG_PORT_STATUS(_i) (0x07c + (_i) * 4) +#define AR8XXX_PORT_STATUS_SPEED GENMASK(2, 0) +#define AR8XXX_PORT_STATUS_SPEED_S 0 +#define AR8XXX_PORT_STATUS_TXMAC BIT(2) +#define AR8XXX_PORT_STATUS_RXMAC BIT(3) +#define AR8XXX_PORT_STATUS_TXFLOW BIT(4) +#define AR8XXX_PORT_STATUS_RXFLOW BIT(5) +#define AR8XXX_PORT_STATUS_DUPLEX BIT(6) +#define AR8XXX_PORT_STATUS_LINK_UP BIT(8) +#define AR8XXX_PORT_STATUS_LINK_AUTO BIT(9) +#define AR8XXX_PORT_STATUS_LINK_PAUSE BIT(10) + +#define AR8327_REG_PORT_HDR_CTRL(_i) (0x9c + (_i * 4)) +#define AR8327_PORT_HDR_CTRL_RX_MASK GENMASK(3, 2) +#define AR8327_PORT_HDR_CTRL_RX_S 2 +#define AR8327_PORT_HDR_CTRL_TX_MASK GENMASK(1, 0) +#define AR8327_PORT_HDR_CTRL_TX_S 0 +#define AR8327_PORT_HDR_CTRL_ALL 2 +#define AR8327_PORT_HDR_CTRL_MGMT 1 +#define AR8327_PORT_HDR_CTRL_NONE 0 + +#define AR8327_REG_GLOBAL_FW_CTRL0 0x620 +#define AR8327_GLOBAL_FW_CTRL0_CPU_PORT_EN BIT(10) + +#define AR8327_REG_GLOBAL_FW_CTRL1 0x624 +#define AR8327_GLOBAL_FW_CTRL1_IGMP_DP_MASK GENMASK(30, 24) +#define AR8327_GLOBAL_FW_CTRL1_IGMP_DP_S 24 +#define AR8327_GLOBAL_FW_CTRL1_BC_DP_MASK GENMASK(22, 16) +#define AR8327_GLOBAL_FW_CTRL1_BC_DP_S 16 +#define AR8327_GLOBAL_FW_CTRL1_MC_DP_MASK GENMASK(14, 8) +#define AR8327_GLOBAL_FW_CTRL1_MC_DP_S 8 +#define AR8327_GLOBAL_FW_CTRL1_UC_DP_MASK GENMASK(6, 0) +#define AR8327_GLOBAL_FW_CTRL1_UC_DP_S 0 + +#define AR8327_PORT_LOOKUP_CTRL(_i) (0x660 + (_i) * 0xc) +#define AR8327_PORT_LOOKUP_MEMBER GENMASK(6, 0) +#define AR8327_PORT_LOOKUP_IN_MODE GENMASK(9, 8) +#define AR8327_PORT_LOOKUP_IN_MODE_S 8 +#define AR8327_PORT_LOOKUP_STATE GENMASK(18, 16) +#define AR8327_PORT_LOOKUP_STATE_S 16 +#define AR8327_PORT_LOOKUP_LEARN BIT(20) +#define AR8327_PORT_LOOKUP_ING_MIRROR_EN BIT(25) + +#define AR8327_PORT_MIB_COUNTER(_i) (0x1000 + (_i) * 0x100) + +/* port speed */ +enum { + AR8XXX_PORT_SPEED_10M = 0, + AR8XXX_PORT_SPEED_100M = 1, + AR8XXX_PORT_SPEED_1000M = 2, + AR8XXX_PORT_SPEED_ERR = 3, +}; + +static inline int port_to_phy(int port) +{ + if (port >= 1 && port <= 6) + return port - 1; + + return -1; +} + +static inline int phy_to_port(int phy) +{ + if (phy < 5) + return phy + 1; + + return -1; +} + +u32 +ar8xxx_rmw(struct dsa_switch *ds, int reg, u32 mask, u32 val); + +static inline void +split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page) +{ + regaddr >>= 1; + *r1 = regaddr & 0x1e; + + regaddr >>= 5; + *r2 = regaddr & 0x7; + + regaddr >>= 3; + *page = regaddr & 0x1ff; +} + +static inline void +wait_for_page_switch(void) +{ + udelay(5); +} + +static inline void +ar8xxx_reg_set(struct dsa_switch *ds, int reg, u32 val) +{ + ar8xxx_rmw(ds, reg, 0, val); +} + +static inline void +ar8xxx_reg_clear(struct dsa_switch *ds, int reg, u32 val) +{ + ar8xxx_rmw(ds, reg, val, 0); +} + +#endif /* __AR8XXX_H */ --- a/net/dsa/dsa.c +++ b/net/dsa/dsa.c @@ -285,6 +285,11 @@ static int dsa_switch_setup_one(struct d dst->rcv = brcm_netdev_ops.rcv; break; #endif +#ifdef CONFIG_NET_DSA_TAG_QCA + case DSA_TAG_PROTO_QCA: + dst->rcv = qca_netdev_ops.rcv; + break; +#endif case DSA_TAG_PROTO_NONE: break; default: @@ -1041,6 +1046,7 @@ static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa static const struct of_device_id dsa_of_match_table[] = { { .compatible = "brcm,bcm7445-switch-v4.0" }, + { .compatible = "qca,ar8xxx", }, { .compatible = "marvell,dsa", }, {} }; --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -26,6 +26,7 @@ enum dsa_tag_protocol { DSA_TAG_PROTO_TRAILER, DSA_TAG_PROTO_EDSA, DSA_TAG_PROTO_BRCM, + DSA_TAG_PROTO_QCA, }; #define DSA_MAX_SWITCHES 4 --- a/net/dsa/Kconfig +++ b/net/dsa/Kconfig @@ -27,6 +27,9 @@ config NET_DSA_HWMON via the hwmon sysfs interface and exposes the onboard sensors. # tagging formats +config NET_DSA_TAG_QCA + bool + config NET_DSA_TAG_BRCM bool --- a/net/dsa/Makefile +++ b/net/dsa/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_NET_DSA) += dsa_core.o dsa_core-y += dsa.o slave.o # tagging formats +dsa_core-$(CONFIG_NET_DSA_TAG_QCA) += tag_qca.o dsa_core-$(CONFIG_NET_DSA_TAG_BRCM) += tag_brcm.o dsa_core-$(CONFIG_NET_DSA_TAG_DSA) += tag_dsa.o dsa_core-$(CONFIG_NET_DSA_TAG_EDSA) += tag_edsa.o --- a/net/dsa/dsa_priv.h +++ b/net/dsa/dsa_priv.h @@ -78,5 +78,7 @@ extern const struct dsa_device_ops trail /* tag_brcm.c */ extern const struct dsa_device_ops brcm_netdev_ops; +/* tag_qca.c */ +extern const struct dsa_device_ops qca_netdev_ops; #endif --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -1186,6 +1186,11 @@ int dsa_slave_create(struct dsa_switch * p->xmit = brcm_netdev_ops.xmit; break; #endif +#ifdef CONFIG_NET_DSA_TAG_QCA + case DSA_TAG_PROTO_QCA: + p->xmit = qca_netdev_ops.xmit; + break; +#endif default: p->xmit = dsa_slave_notag_xmit; break; --- /dev/null +++ b/net/dsa/tag_qca.c @@ -0,0 +1,158 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include "dsa_priv.h" + +#define QCA_HDR_LEN 2 +#define QCA_HDR_VERSION 0x2 + +#define QCA_HDR_RECV_VERSION_MASK GENMASK(15, 14) +#define QCA_HDR_RECV_VERSION_S 14 +#define QCA_HDR_RECV_PRIORITY_MASK GENMASK(13, 11) +#define QCA_HDR_RECV_PRIORITY_S 11 +#define QCA_HDR_RECV_TYPE_MASK GENMASK(10, 6) +#define QCA_HDR_RECV_TYPE_S 6 +#define QCA_HDR_RECV_FRAME_IS_TAGGED BIT(3) +#define QCA_HDR_RECV_SOURCE_PORT_MASK GENMASK(2, 0) + +#define QCA_HDR_XMIT_VERSION_MASK GENMASK(15, 14) +#define QCA_HDR_XMIT_VERSION_S 14 +#define QCA_HDR_XMIT_PRIORITY_MASK GENMASK(13, 11) +#define QCA_HDR_XMIT_PRIORITY_S 11 +#define QCA_HDR_XMIT_CONTROL_MASK GENMASK(10, 8) +#define QCA_HDR_XMIT_CONTROL_S 8 +#define QCA_HDR_XMIT_FROM_CPU BIT(7) +#define QCA_HDR_XMIT_DP_BIT_MASK GENMASK(6, 0) + +static inline int reg_to_port(int reg) +{ + if (reg < 5) + return reg + 1; + + return -1; +} + +static inline int port_to_reg(int port) +{ + if (port >= 1 && port <= 6) + return port - 1; + + return -1; +} + +static netdev_tx_t qca_tag_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct dsa_slave_priv *p = netdev_priv(dev); + u16 *phdr, hdr; + + dev->stats.tx_packets++; + dev->stats.tx_bytes += skb->len; + + if (skb_cow_head(skb, 0) < 0) + goto out_free; + + skb_push(skb, QCA_HDR_LEN); + + memmove(skb->data, skb->data + QCA_HDR_LEN, 2 * ETH_ALEN); + phdr = (u16 *)(skb->data + 2 * ETH_ALEN); + + /* Set the version field, and set destination port information */ + hdr = QCA_HDR_VERSION << QCA_HDR_XMIT_VERSION_S | + QCA_HDR_XMIT_FROM_CPU | + 1 << reg_to_port(p->port); + + *phdr = htons(hdr); + + skb->dev = p->parent->dst->master_netdev; + dev_queue_xmit(skb); + + return NETDEV_TX_OK; + +out_free: + kfree_skb(skb); + return NETDEV_TX_OK; +} + +static int qca_tag_rcv(struct sk_buff *skb, struct net_device *dev, + struct packet_type *pt, struct net_device *orig_dev) +{ + struct dsa_switch_tree *dst = dev->dsa_ptr; + struct dsa_switch *ds; + u8 ver; + int port, phy; + __be16 *phdr, hdr; + + if (unlikely(!dst)) + goto out_drop; + + skb = skb_unshare(skb, GFP_ATOMIC); + if (!skb) + goto out; + + if (unlikely(!pskb_may_pull(skb, QCA_HDR_LEN))) + goto out_drop; + + /* Ethernet is added by the switch between src addr and Ethertype + * At this point, skb->data points to ethertype so header should be + * right before + */ + phdr = (__be16 *)(skb->data - 2); + hdr = ntohs(*phdr); + + /* Make sure the version is correct */ + ver = (hdr & QCA_HDR_RECV_VERSION_MASK) >> QCA_HDR_RECV_VERSION_S; + if (unlikely(ver != QCA_HDR_VERSION)) + goto out_drop; + + /* Remove QCA tag and recalculate checksum */ + skb_pull_rcsum(skb, QCA_HDR_LEN); + memmove(skb->data - ETH_HLEN, skb->data - ETH_HLEN - QCA_HDR_LEN, + ETH_HLEN - QCA_HDR_LEN); + + /* This protocol doesn't support cascading multiple switches so it's + * safe to assume the switch is first in the tree + */ + ds = dst->ds[0]; + if (!ds) + goto out_drop; + + /* Get source port information */ + port = (hdr & QCA_HDR_RECV_SOURCE_PORT_MASK); + phy = port_to_reg(port); + if (unlikely(phy < 0) || !ds->ports[phy]) + goto out_drop; + + /* Update skb & forward the frame accordingly */ + skb_push(skb, ETH_HLEN); + skb->pkt_type = PACKET_HOST; + skb->dev = ds->ports[phy]; + skb->protocol = eth_type_trans(skb, skb->dev); + + skb->dev->stats.rx_packets++; + skb->dev->stats.rx_bytes += skb->len; + + netif_receive_skb(skb); + + return 0; + +out_drop: + kfree_skb(skb); +out: + return 0; +} + +const struct dsa_device_ops qca_netdev_ops = { + .xmit = qca_tag_xmit, + .rcv = qca_tag_rcv, +}; --- /dev/null +++ b/Documentation/devicetree/bindings/net/dsa/qca-ar8xxx.txt @@ -0,0 +1,70 @@ +* Qualcomm Atheros AR8xxx switch family + +Required properties: + +- compatible: should be "qca,ar8xxx" +- dsa,mii-bus: phandle to the MDIO bus controller, see dsa/dsa.txt +- dsa,ethernet: phandle to the CPU network interface controller, see dsa/dsa.txt +- #size-cells: must be 0 +- #address-cells: must be 2, see dsa/dsa.txt + +Subnodes: + +The integrated switch subnode should be specified according to the binding +described in dsa/dsa.txt. + +Optional properties: + +- qca,port6-phy-mode: if specified, the driver will configure Port 6 in the + given phy-mode. See Documentation/devicetree/bindings/net/ethernet.txt for + the list of valid phy-mode. + +- qca,port6-phy-id: if specified, the driver will connect Port 6 to the PHY + given as a parameter. In this case, Port6 and the corresponding PHY will be + isolated from the rest of the switch. From a system perspective, they will + act as a regular PHY. + +Example: + + dsa@0 { + compatible = "qca,ar8xxx"; + #address-cells = <2>; + #size-cells = <0>; + + dsa,ethernet = <ðernet0>; + dsa,mii-bus = <&mii_bus0>; + + switch@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0 0>; /* MDIO address 0, switch 0 in tree */ + + qca,port6-phy-mode = "sgmii"; + qca,port6-phy-id = <4>; + + port@0 { + reg = <11>; + label = "cpu"; + }; + + port@1 { + reg = <0>; + label = "lan1"; + }; + + port@2 { + reg = <1>; + label = "lan2"; + }; + + port@3 { + reg = <2>; + label = "lan3"; + }; + + port@4 { + reg = <3>; + label = "lan4"; + }; + }; + };