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linux/drivers/net/dsa/lantiq_gswip.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Lantiq / Intel GSWIP switch driver for VRX200 SoCs
*
* Copyright (C) 2010 Lantiq Deutschland
* Copyright (C) 2012 John Crispin <john@phrozen.org>
* Copyright (C) 2017 - 2018 Hauke Mehrtens <hauke@hauke-m.de>
*/
#include <linux/clk.h>
#include <linux/etherdevice.h>
#include <linux/firmware.h>
#include <linux/if_bridge.h>
#include <linux/if_vlan.h>
#include <linux/iopoll.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/phylink.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <net/dsa.h>
#include <dt-bindings/mips/lantiq_rcu_gphy.h>
#include "lantiq_pce.h"
/* GSWIP MDIO Registers */
#define GSWIP_MDIO_GLOB 0x00
#define GSWIP_MDIO_GLOB_ENABLE BIT(15)
#define GSWIP_MDIO_CTRL 0x08
#define GSWIP_MDIO_CTRL_BUSY BIT(12)
#define GSWIP_MDIO_CTRL_RD BIT(11)
#define GSWIP_MDIO_CTRL_WR BIT(10)
#define GSWIP_MDIO_CTRL_PHYAD_MASK 0x1f
#define GSWIP_MDIO_CTRL_PHYAD_SHIFT 5
#define GSWIP_MDIO_CTRL_REGAD_MASK 0x1f
#define GSWIP_MDIO_READ 0x09
#define GSWIP_MDIO_WRITE 0x0A
#define GSWIP_MDIO_MDC_CFG0 0x0B
#define GSWIP_MDIO_MDC_CFG1 0x0C
#define GSWIP_MDIO_PHYp(p) (0x15 - (p))
#define GSWIP_MDIO_PHY_LINK_MASK 0x6000
#define GSWIP_MDIO_PHY_LINK_AUTO 0x0000
#define GSWIP_MDIO_PHY_LINK_DOWN 0x4000
#define GSWIP_MDIO_PHY_LINK_UP 0x2000
#define GSWIP_MDIO_PHY_SPEED_MASK 0x1800
#define GSWIP_MDIO_PHY_SPEED_AUTO 0x1800
#define GSWIP_MDIO_PHY_SPEED_M10 0x0000
#define GSWIP_MDIO_PHY_SPEED_M100 0x0800
#define GSWIP_MDIO_PHY_SPEED_G1 0x1000
#define GSWIP_MDIO_PHY_FDUP_MASK 0x0600
#define GSWIP_MDIO_PHY_FDUP_AUTO 0x0000
#define GSWIP_MDIO_PHY_FDUP_EN 0x0200
#define GSWIP_MDIO_PHY_FDUP_DIS 0x0600
#define GSWIP_MDIO_PHY_FCONTX_MASK 0x0180
#define GSWIP_MDIO_PHY_FCONTX_AUTO 0x0000
#define GSWIP_MDIO_PHY_FCONTX_EN 0x0100
#define GSWIP_MDIO_PHY_FCONTX_DIS 0x0180
#define GSWIP_MDIO_PHY_FCONRX_MASK 0x0060
#define GSWIP_MDIO_PHY_FCONRX_AUTO 0x0000
#define GSWIP_MDIO_PHY_FCONRX_EN 0x0020
#define GSWIP_MDIO_PHY_FCONRX_DIS 0x0060
#define GSWIP_MDIO_PHY_ADDR_MASK 0x001f
#define GSWIP_MDIO_PHY_MASK (GSWIP_MDIO_PHY_ADDR_MASK | \
GSWIP_MDIO_PHY_FCONRX_MASK | \
GSWIP_MDIO_PHY_FCONTX_MASK | \
GSWIP_MDIO_PHY_LINK_MASK | \
GSWIP_MDIO_PHY_SPEED_MASK | \
GSWIP_MDIO_PHY_FDUP_MASK)
/* GSWIP MII Registers */
#define GSWIP_MII_CFG0 0x00
#define GSWIP_MII_CFG1 0x02
#define GSWIP_MII_CFG5 0x04
#define GSWIP_MII_CFG_EN BIT(14)
#define GSWIP_MII_CFG_LDCLKDIS BIT(12)
#define GSWIP_MII_CFG_MODE_MIIP 0x0
#define GSWIP_MII_CFG_MODE_MIIM 0x1
#define GSWIP_MII_CFG_MODE_RMIIP 0x2
#define GSWIP_MII_CFG_MODE_RMIIM 0x3
#define GSWIP_MII_CFG_MODE_RGMII 0x4
#define GSWIP_MII_CFG_MODE_MASK 0xf
#define GSWIP_MII_CFG_RATE_M2P5 0x00
#define GSWIP_MII_CFG_RATE_M25 0x10
#define GSWIP_MII_CFG_RATE_M125 0x20
#define GSWIP_MII_CFG_RATE_M50 0x30
#define GSWIP_MII_CFG_RATE_AUTO 0x40
#define GSWIP_MII_CFG_RATE_MASK 0x70
#define GSWIP_MII_PCDU0 0x01
#define GSWIP_MII_PCDU1 0x03
#define GSWIP_MII_PCDU5 0x05
#define GSWIP_MII_PCDU_TXDLY_MASK GENMASK(2, 0)
#define GSWIP_MII_PCDU_RXDLY_MASK GENMASK(9, 7)
/* GSWIP Core Registers */
#define GSWIP_SWRES 0x000
#define GSWIP_SWRES_R1 BIT(1) /* GSWIP Software reset */
#define GSWIP_SWRES_R0 BIT(0) /* GSWIP Hardware reset */
#define GSWIP_VERSION 0x013
#define GSWIP_VERSION_REV_SHIFT 0
#define GSWIP_VERSION_REV_MASK GENMASK(7, 0)
#define GSWIP_VERSION_MOD_SHIFT 8
#define GSWIP_VERSION_MOD_MASK GENMASK(15, 8)
#define GSWIP_VERSION_2_0 0x100
#define GSWIP_VERSION_2_1 0x021
#define GSWIP_VERSION_2_2 0x122
#define GSWIP_VERSION_2_2_ETC 0x022
#define GSWIP_BM_RAM_VAL(x) (0x043 - (x))
#define GSWIP_BM_RAM_ADDR 0x044
#define GSWIP_BM_RAM_CTRL 0x045
#define GSWIP_BM_RAM_CTRL_BAS BIT(15)
#define GSWIP_BM_RAM_CTRL_OPMOD BIT(5)
#define GSWIP_BM_RAM_CTRL_ADDR_MASK GENMASK(4, 0)
#define GSWIP_BM_QUEUE_GCTRL 0x04A
#define GSWIP_BM_QUEUE_GCTRL_GL_MOD BIT(10)
/* buffer management Port Configuration Register */
#define GSWIP_BM_PCFGp(p) (0x080 + ((p) * 2))
#define GSWIP_BM_PCFG_CNTEN BIT(0) /* RMON Counter Enable */
#define GSWIP_BM_PCFG_IGCNT BIT(1) /* Ingres Special Tag RMON count */
/* buffer management Port Control Register */
#define GSWIP_BM_RMON_CTRLp(p) (0x81 + ((p) * 2))
#define GSWIP_BM_CTRL_RMON_RAM1_RES BIT(0) /* Software Reset for RMON RAM 1 */
#define GSWIP_BM_CTRL_RMON_RAM2_RES BIT(1) /* Software Reset for RMON RAM 2 */
/* PCE */
#define GSWIP_PCE_TBL_KEY(x) (0x447 - (x))
#define GSWIP_PCE_TBL_MASK 0x448
#define GSWIP_PCE_TBL_VAL(x) (0x44D - (x))
#define GSWIP_PCE_TBL_ADDR 0x44E
#define GSWIP_PCE_TBL_CTRL 0x44F
#define GSWIP_PCE_TBL_CTRL_BAS BIT(15)
#define GSWIP_PCE_TBL_CTRL_TYPE BIT(13)
#define GSWIP_PCE_TBL_CTRL_VLD BIT(12)
#define GSWIP_PCE_TBL_CTRL_KEYFORM BIT(11)
#define GSWIP_PCE_TBL_CTRL_GMAP_MASK GENMASK(10, 7)
#define GSWIP_PCE_TBL_CTRL_OPMOD_MASK GENMASK(6, 5)
#define GSWIP_PCE_TBL_CTRL_OPMOD_ADRD 0x00
#define GSWIP_PCE_TBL_CTRL_OPMOD_ADWR 0x20
#define GSWIP_PCE_TBL_CTRL_OPMOD_KSRD 0x40
#define GSWIP_PCE_TBL_CTRL_OPMOD_KSWR 0x60
#define GSWIP_PCE_TBL_CTRL_ADDR_MASK GENMASK(4, 0)
#define GSWIP_PCE_PMAP1 0x453 /* Monitoring port map */
#define GSWIP_PCE_PMAP2 0x454 /* Default Multicast port map */
#define GSWIP_PCE_PMAP3 0x455 /* Default Unknown Unicast port map */
#define GSWIP_PCE_GCTRL_0 0x456
#define GSWIP_PCE_GCTRL_0_MC_VALID BIT(3)
#define GSWIP_PCE_GCTRL_0_VLAN BIT(14) /* VLAN aware Switching */
#define GSWIP_PCE_GCTRL_1 0x457
#define GSWIP_PCE_GCTRL_1_MAC_GLOCK BIT(2) /* MAC Address table lock */
#define GSWIP_PCE_GCTRL_1_MAC_GLOCK_MOD BIT(3) /* Mac address table lock forwarding mode */
#define GSWIP_PCE_PCTRL_0p(p) (0x480 + ((p) * 0xA))
#define GSWIP_PCE_PCTRL_0_INGRESS BIT(11)
#define GSWIP_PCE_PCTRL_0_PSTATE_LISTEN 0x0
#define GSWIP_PCE_PCTRL_0_PSTATE_RX 0x1
#define GSWIP_PCE_PCTRL_0_PSTATE_TX 0x2
#define GSWIP_PCE_PCTRL_0_PSTATE_LEARNING 0x3
#define GSWIP_PCE_PCTRL_0_PSTATE_FORWARDING 0x7
#define GSWIP_PCE_PCTRL_0_PSTATE_MASK GENMASK(2, 0)
#define GSWIP_MAC_FLEN 0x8C5
#define GSWIP_MAC_CTRL_2p(p) (0x905 + ((p) * 0xC))
#define GSWIP_MAC_CTRL_2_MLEN BIT(3) /* Maximum Untagged Frame Lnegth */
/* Ethernet Switch Fetch DMA Port Control Register */
#define GSWIP_FDMA_PCTRLp(p) (0xA80 + ((p) * 0x6))
#define GSWIP_FDMA_PCTRL_EN BIT(0) /* FDMA Port Enable */
#define GSWIP_FDMA_PCTRL_STEN BIT(1) /* Special Tag Insertion Enable */
#define GSWIP_FDMA_PCTRL_VLANMOD_MASK GENMASK(4, 3) /* VLAN Modification Control */
#define GSWIP_FDMA_PCTRL_VLANMOD_SHIFT 3 /* VLAN Modification Control */
#define GSWIP_FDMA_PCTRL_VLANMOD_DIS (0x0 << GSWIP_FDMA_PCTRL_VLANMOD_SHIFT)
#define GSWIP_FDMA_PCTRL_VLANMOD_PRIO (0x1 << GSWIP_FDMA_PCTRL_VLANMOD_SHIFT)
#define GSWIP_FDMA_PCTRL_VLANMOD_ID (0x2 << GSWIP_FDMA_PCTRL_VLANMOD_SHIFT)
#define GSWIP_FDMA_PCTRL_VLANMOD_BOTH (0x3 << GSWIP_FDMA_PCTRL_VLANMOD_SHIFT)
/* Ethernet Switch Store DMA Port Control Register */
#define GSWIP_SDMA_PCTRLp(p) (0xBC0 + ((p) * 0x6))
#define GSWIP_SDMA_PCTRL_EN BIT(0) /* SDMA Port Enable */
#define GSWIP_SDMA_PCTRL_FCEN BIT(1) /* Flow Control Enable */
#define GSWIP_SDMA_PCTRL_PAUFWD BIT(1) /* Pause Frame Forwarding */
#define XRX200_GPHY_FW_ALIGN (16 * 1024)
struct gswip_hw_info {
int max_ports;
int cpu_port;
};
struct xway_gphy_match_data {
char *fe_firmware_name;
char *ge_firmware_name;
};
struct gswip_gphy_fw {
struct clk *clk_gate;
struct reset_control *reset;
u32 fw_addr_offset;
char *fw_name;
};
struct gswip_priv {
__iomem void *gswip;
__iomem void *mdio;
__iomem void *mii;
const struct gswip_hw_info *hw_info;
const struct xway_gphy_match_data *gphy_fw_name_cfg;
struct dsa_switch *ds;
struct device *dev;
struct regmap *rcu_regmap;
int num_gphy_fw;
struct gswip_gphy_fw *gphy_fw;
};
struct gswip_rmon_cnt_desc {
unsigned int size;
unsigned int offset;
const char *name;
};
#define MIB_DESC(_size, _offset, _name) {.size = _size, .offset = _offset, .name = _name}
static const struct gswip_rmon_cnt_desc gswip_rmon_cnt[] = {
/** Receive Packet Count (only packets that are accepted and not discarded). */
MIB_DESC(1, 0x1F, "RxGoodPkts"),
MIB_DESC(1, 0x23, "RxUnicastPkts"),
MIB_DESC(1, 0x22, "RxMulticastPkts"),
MIB_DESC(1, 0x21, "RxFCSErrorPkts"),
MIB_DESC(1, 0x1D, "RxUnderSizeGoodPkts"),
MIB_DESC(1, 0x1E, "RxUnderSizeErrorPkts"),
MIB_DESC(1, 0x1B, "RxOversizeGoodPkts"),
MIB_DESC(1, 0x1C, "RxOversizeErrorPkts"),
MIB_DESC(1, 0x20, "RxGoodPausePkts"),
MIB_DESC(1, 0x1A, "RxAlignErrorPkts"),
MIB_DESC(1, 0x12, "Rx64BytePkts"),
MIB_DESC(1, 0x13, "Rx127BytePkts"),
MIB_DESC(1, 0x14, "Rx255BytePkts"),
MIB_DESC(1, 0x15, "Rx511BytePkts"),
MIB_DESC(1, 0x16, "Rx1023BytePkts"),
/** Receive Size 1024-1522 (or more, if configured) Packet Count. */
MIB_DESC(1, 0x17, "RxMaxBytePkts"),
MIB_DESC(1, 0x18, "RxDroppedPkts"),
MIB_DESC(1, 0x19, "RxFilteredPkts"),
MIB_DESC(2, 0x24, "RxGoodBytes"),
MIB_DESC(2, 0x26, "RxBadBytes"),
MIB_DESC(1, 0x11, "TxAcmDroppedPkts"),
MIB_DESC(1, 0x0C, "TxGoodPkts"),
MIB_DESC(1, 0x06, "TxUnicastPkts"),
MIB_DESC(1, 0x07, "TxMulticastPkts"),
MIB_DESC(1, 0x00, "Tx64BytePkts"),
MIB_DESC(1, 0x01, "Tx127BytePkts"),
MIB_DESC(1, 0x02, "Tx255BytePkts"),
MIB_DESC(1, 0x03, "Tx511BytePkts"),
MIB_DESC(1, 0x04, "Tx1023BytePkts"),
/** Transmit Size 1024-1522 (or more, if configured) Packet Count. */
MIB_DESC(1, 0x05, "TxMaxBytePkts"),
MIB_DESC(1, 0x08, "TxSingleCollCount"),
MIB_DESC(1, 0x09, "TxMultCollCount"),
MIB_DESC(1, 0x0A, "TxLateCollCount"),
MIB_DESC(1, 0x0B, "TxExcessCollCount"),
MIB_DESC(1, 0x0D, "TxPauseCount"),
MIB_DESC(1, 0x10, "TxDroppedPkts"),
MIB_DESC(2, 0x0E, "TxGoodBytes"),
};
static u32 gswip_switch_r(struct gswip_priv *priv, u32 offset)
{
return __raw_readl(priv->gswip + (offset * 4));
}
static void gswip_switch_w(struct gswip_priv *priv, u32 val, u32 offset)
{
__raw_writel(val, priv->gswip + (offset * 4));
}
static void gswip_switch_mask(struct gswip_priv *priv, u32 clear, u32 set,
u32 offset)
{
u32 val = gswip_switch_r(priv, offset);
val &= ~(clear);
val |= set;
gswip_switch_w(priv, val, offset);
}
static u32 gswip_switch_r_timeout(struct gswip_priv *priv, u32 offset,
u32 cleared)
{
u32 val;
return readx_poll_timeout(__raw_readl, priv->gswip + (offset * 4), val,
(val & cleared) == 0, 20, 50000);
}
static u32 gswip_mdio_r(struct gswip_priv *priv, u32 offset)
{
return __raw_readl(priv->mdio + (offset * 4));
}
static void gswip_mdio_w(struct gswip_priv *priv, u32 val, u32 offset)
{
__raw_writel(val, priv->mdio + (offset * 4));
}
static void gswip_mdio_mask(struct gswip_priv *priv, u32 clear, u32 set,
u32 offset)
{
u32 val = gswip_mdio_r(priv, offset);
val &= ~(clear);
val |= set;
gswip_mdio_w(priv, val, offset);
}
static u32 gswip_mii_r(struct gswip_priv *priv, u32 offset)
{
return __raw_readl(priv->mii + (offset * 4));
}
static void gswip_mii_w(struct gswip_priv *priv, u32 val, u32 offset)
{
__raw_writel(val, priv->mii + (offset * 4));
}
static void gswip_mii_mask(struct gswip_priv *priv, u32 clear, u32 set,
u32 offset)
{
u32 val = gswip_mii_r(priv, offset);
val &= ~(clear);
val |= set;
gswip_mii_w(priv, val, offset);
}
static void gswip_mii_mask_cfg(struct gswip_priv *priv, u32 clear, u32 set,
int port)
{
switch (port) {
case 0:
gswip_mii_mask(priv, clear, set, GSWIP_MII_CFG0);
break;
case 1:
gswip_mii_mask(priv, clear, set, GSWIP_MII_CFG1);
break;
case 5:
gswip_mii_mask(priv, clear, set, GSWIP_MII_CFG5);
break;
}
}
static void gswip_mii_mask_pcdu(struct gswip_priv *priv, u32 clear, u32 set,
int port)
{
switch (port) {
case 0:
gswip_mii_mask(priv, clear, set, GSWIP_MII_PCDU0);
break;
case 1:
gswip_mii_mask(priv, clear, set, GSWIP_MII_PCDU1);
break;
case 5:
gswip_mii_mask(priv, clear, set, GSWIP_MII_PCDU5);
break;
}
}
static int gswip_mdio_poll(struct gswip_priv *priv)
{
int cnt = 100;
while (likely(cnt--)) {
u32 ctrl = gswip_mdio_r(priv, GSWIP_MDIO_CTRL);
if ((ctrl & GSWIP_MDIO_CTRL_BUSY) == 0)
return 0;
usleep_range(20, 40);
}
return -ETIMEDOUT;
}
static int gswip_mdio_wr(struct mii_bus *bus, int addr, int reg, u16 val)
{
struct gswip_priv *priv = bus->priv;
int err;
err = gswip_mdio_poll(priv);
if (err) {
dev_err(&bus->dev, "waiting for MDIO bus busy timed out\n");
return err;
}
gswip_mdio_w(priv, val, GSWIP_MDIO_WRITE);
gswip_mdio_w(priv, GSWIP_MDIO_CTRL_BUSY | GSWIP_MDIO_CTRL_WR |
((addr & GSWIP_MDIO_CTRL_PHYAD_MASK) << GSWIP_MDIO_CTRL_PHYAD_SHIFT) |
(reg & GSWIP_MDIO_CTRL_REGAD_MASK),
GSWIP_MDIO_CTRL);
return 0;
}
static int gswip_mdio_rd(struct mii_bus *bus, int addr, int reg)
{
struct gswip_priv *priv = bus->priv;
int err;
err = gswip_mdio_poll(priv);
if (err) {
dev_err(&bus->dev, "waiting for MDIO bus busy timed out\n");
return err;
}
gswip_mdio_w(priv, GSWIP_MDIO_CTRL_BUSY | GSWIP_MDIO_CTRL_RD |
((addr & GSWIP_MDIO_CTRL_PHYAD_MASK) << GSWIP_MDIO_CTRL_PHYAD_SHIFT) |
(reg & GSWIP_MDIO_CTRL_REGAD_MASK),
GSWIP_MDIO_CTRL);
err = gswip_mdio_poll(priv);
if (err) {
dev_err(&bus->dev, "waiting for MDIO bus busy timed out\n");
return err;
}
return gswip_mdio_r(priv, GSWIP_MDIO_READ);
}
static int gswip_mdio(struct gswip_priv *priv, struct device_node *mdio_np)
{
struct dsa_switch *ds = priv->ds;
ds->slave_mii_bus = devm_mdiobus_alloc(priv->dev);
if (!ds->slave_mii_bus)
return -ENOMEM;
ds->slave_mii_bus->priv = priv;
ds->slave_mii_bus->read = gswip_mdio_rd;
ds->slave_mii_bus->write = gswip_mdio_wr;
ds->slave_mii_bus->name = "lantiq,xrx200-mdio";
snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "%s-mii",
dev_name(priv->dev));
ds->slave_mii_bus->parent = priv->dev;
ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
return of_mdiobus_register(ds->slave_mii_bus, mdio_np);
}
static int gswip_port_enable(struct dsa_switch *ds, int port,
struct phy_device *phydev)
{
struct gswip_priv *priv = ds->priv;
/* RMON Counter Enable for port */
gswip_switch_w(priv, GSWIP_BM_PCFG_CNTEN, GSWIP_BM_PCFGp(port));
/* enable port fetch/store dma & VLAN Modification */
gswip_switch_mask(priv, 0, GSWIP_FDMA_PCTRL_EN |
GSWIP_FDMA_PCTRL_VLANMOD_BOTH,
GSWIP_FDMA_PCTRLp(port));
gswip_switch_mask(priv, 0, GSWIP_SDMA_PCTRL_EN,
GSWIP_SDMA_PCTRLp(port));
gswip_switch_mask(priv, 0, GSWIP_PCE_PCTRL_0_INGRESS,
GSWIP_PCE_PCTRL_0p(port));
if (!dsa_is_cpu_port(ds, port)) {
u32 macconf = GSWIP_MDIO_PHY_LINK_AUTO |
GSWIP_MDIO_PHY_SPEED_AUTO |
GSWIP_MDIO_PHY_FDUP_AUTO |
GSWIP_MDIO_PHY_FCONTX_AUTO |
GSWIP_MDIO_PHY_FCONRX_AUTO |
(phydev->mdio.addr & GSWIP_MDIO_PHY_ADDR_MASK);
gswip_mdio_w(priv, macconf, GSWIP_MDIO_PHYp(port));
/* Activate MDIO auto polling */
gswip_mdio_mask(priv, 0, BIT(port), GSWIP_MDIO_MDC_CFG0);
}
return 0;
}
static void gswip_port_disable(struct dsa_switch *ds, int port,
struct phy_device *phy)
{
struct gswip_priv *priv = ds->priv;
if (!dsa_is_cpu_port(ds, port)) {
gswip_mdio_mask(priv, GSWIP_MDIO_PHY_LINK_DOWN,
GSWIP_MDIO_PHY_LINK_MASK,
GSWIP_MDIO_PHYp(port));
/* Deactivate MDIO auto polling */
gswip_mdio_mask(priv, BIT(port), 0, GSWIP_MDIO_MDC_CFG0);
}
gswip_switch_mask(priv, GSWIP_FDMA_PCTRL_EN, 0,
GSWIP_FDMA_PCTRLp(port));
gswip_switch_mask(priv, GSWIP_SDMA_PCTRL_EN, 0,
GSWIP_SDMA_PCTRLp(port));
}
static int gswip_pce_load_microcode(struct gswip_priv *priv)
{
int i;
int err;
gswip_switch_mask(priv, GSWIP_PCE_TBL_CTRL_ADDR_MASK |
GSWIP_PCE_TBL_CTRL_OPMOD_MASK,
GSWIP_PCE_TBL_CTRL_OPMOD_ADWR, GSWIP_PCE_TBL_CTRL);
gswip_switch_w(priv, 0, GSWIP_PCE_TBL_MASK);
for (i = 0; i < ARRAY_SIZE(gswip_pce_microcode); i++) {
gswip_switch_w(priv, i, GSWIP_PCE_TBL_ADDR);
gswip_switch_w(priv, gswip_pce_microcode[i].val_0,
GSWIP_PCE_TBL_VAL(0));
gswip_switch_w(priv, gswip_pce_microcode[i].val_1,
GSWIP_PCE_TBL_VAL(1));
gswip_switch_w(priv, gswip_pce_microcode[i].val_2,
GSWIP_PCE_TBL_VAL(2));
gswip_switch_w(priv, gswip_pce_microcode[i].val_3,
GSWIP_PCE_TBL_VAL(3));
/* start the table access: */
gswip_switch_mask(priv, 0, GSWIP_PCE_TBL_CTRL_BAS,
GSWIP_PCE_TBL_CTRL);
err = gswip_switch_r_timeout(priv, GSWIP_PCE_TBL_CTRL,
GSWIP_PCE_TBL_CTRL_BAS);
if (err)
return err;
}
/* tell the switch that the microcode is loaded */
gswip_switch_mask(priv, 0, GSWIP_PCE_GCTRL_0_MC_VALID,
GSWIP_PCE_GCTRL_0);
return 0;
}
static int gswip_setup(struct dsa_switch *ds)
{
struct gswip_priv *priv = ds->priv;
unsigned int cpu_port = priv->hw_info->cpu_port;
int i;
int err;
gswip_switch_w(priv, GSWIP_SWRES_R0, GSWIP_SWRES);
usleep_range(5000, 10000);
gswip_switch_w(priv, 0, GSWIP_SWRES);
/* disable port fetch/store dma on all ports */
for (i = 0; i < priv->hw_info->max_ports; i++)
gswip_port_disable(ds, i, NULL);
/* enable Switch */
gswip_mdio_mask(priv, 0, GSWIP_MDIO_GLOB_ENABLE, GSWIP_MDIO_GLOB);
err = gswip_pce_load_microcode(priv);
if (err) {
dev_err(priv->dev, "writing PCE microcode failed, %i", err);
return err;
}
/* Default unknown Broadcast/Multicast/Unicast port maps */
gswip_switch_w(priv, BIT(cpu_port), GSWIP_PCE_PMAP1);
gswip_switch_w(priv, BIT(cpu_port), GSWIP_PCE_PMAP2);
gswip_switch_w(priv, BIT(cpu_port), GSWIP_PCE_PMAP3);
/* disable PHY auto polling */
gswip_mdio_w(priv, 0x0, GSWIP_MDIO_MDC_CFG0);
/* Configure the MDIO Clock 2.5 MHz */
gswip_mdio_mask(priv, 0xff, 0x09, GSWIP_MDIO_MDC_CFG1);
/* Disable the xMII link */
gswip_mii_mask_cfg(priv, GSWIP_MII_CFG_EN, 0, 0);
gswip_mii_mask_cfg(priv, GSWIP_MII_CFG_EN, 0, 1);
gswip_mii_mask_cfg(priv, GSWIP_MII_CFG_EN, 0, 5);
/* enable special tag insertion on cpu port */
gswip_switch_mask(priv, 0, GSWIP_FDMA_PCTRL_STEN,
GSWIP_FDMA_PCTRLp(cpu_port));
gswip_switch_mask(priv, 0, GSWIP_MAC_CTRL_2_MLEN,
GSWIP_MAC_CTRL_2p(cpu_port));
gswip_switch_w(priv, VLAN_ETH_FRAME_LEN + 8, GSWIP_MAC_FLEN);
gswip_switch_mask(priv, 0, GSWIP_BM_QUEUE_GCTRL_GL_MOD,
GSWIP_BM_QUEUE_GCTRL);
/* VLAN aware Switching */
gswip_switch_mask(priv, 0, GSWIP_PCE_GCTRL_0_VLAN, GSWIP_PCE_GCTRL_0);
/* Mac Address Table Lock */
gswip_switch_mask(priv, 0, GSWIP_PCE_GCTRL_1_MAC_GLOCK |
GSWIP_PCE_GCTRL_1_MAC_GLOCK_MOD,
GSWIP_PCE_GCTRL_1);
gswip_port_enable(ds, cpu_port, NULL);
return 0;
}
static enum dsa_tag_protocol gswip_get_tag_protocol(struct dsa_switch *ds,
int port)
{
return DSA_TAG_PROTO_GSWIP;
}
static void gswip_phylink_validate(struct dsa_switch *ds, int port,
unsigned long *supported,
struct phylink_link_state *state)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
switch (port) {
case 0:
case 1:
if (!phy_interface_mode_is_rgmii(state->interface) &&
state->interface != PHY_INTERFACE_MODE_MII &&
state->interface != PHY_INTERFACE_MODE_REVMII &&
state->interface != PHY_INTERFACE_MODE_RMII)
goto unsupported;
break;
case 2:
case 3:
case 4:
if (state->interface != PHY_INTERFACE_MODE_INTERNAL)
goto unsupported;
break;
case 5:
if (!phy_interface_mode_is_rgmii(state->interface) &&
state->interface != PHY_INTERFACE_MODE_INTERNAL)
goto unsupported;
break;
default:
bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
dev_err(ds->dev, "Unsupported port: %i\n", port);
return;
}
/* Allow all the expected bits */
phylink_set(mask, Autoneg);
phylink_set_port_modes(mask);
phylink_set(mask, Pause);
phylink_set(mask, Asym_Pause);
/* With the exclusion of MII and Reverse MII, we support Gigabit,
* including Half duplex
*/
if (state->interface != PHY_INTERFACE_MODE_MII &&
state->interface != PHY_INTERFACE_MODE_REVMII) {
phylink_set(mask, 1000baseT_Full);
phylink_set(mask, 1000baseT_Half);
}
phylink_set(mask, 10baseT_Half);
phylink_set(mask, 10baseT_Full);
phylink_set(mask, 100baseT_Half);
phylink_set(mask, 100baseT_Full);
bitmap_and(supported, supported, mask,
__ETHTOOL_LINK_MODE_MASK_NBITS);
bitmap_and(state->advertising, state->advertising, mask,
__ETHTOOL_LINK_MODE_MASK_NBITS);
return;
unsupported:
bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
dev_err(ds->dev, "Unsupported interface: %d\n", state->interface);
return;
}
static void gswip_phylink_mac_config(struct dsa_switch *ds, int port,
unsigned int mode,
const struct phylink_link_state *state)
{
struct gswip_priv *priv = ds->priv;
u32 miicfg = 0;
miicfg |= GSWIP_MII_CFG_LDCLKDIS;
switch (state->interface) {
case PHY_INTERFACE_MODE_MII:
case PHY_INTERFACE_MODE_INTERNAL:
miicfg |= GSWIP_MII_CFG_MODE_MIIM;
break;
case PHY_INTERFACE_MODE_REVMII:
miicfg |= GSWIP_MII_CFG_MODE_MIIP;
break;
case PHY_INTERFACE_MODE_RMII:
miicfg |= GSWIP_MII_CFG_MODE_RMIIM;
break;
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII_RXID:
case PHY_INTERFACE_MODE_RGMII_TXID:
miicfg |= GSWIP_MII_CFG_MODE_RGMII;
break;
default:
dev_err(ds->dev,
"Unsupported interface: %d\n", state->interface);
return;
}
gswip_mii_mask_cfg(priv, GSWIP_MII_CFG_MODE_MASK, miicfg, port);
switch (state->interface) {
case PHY_INTERFACE_MODE_RGMII_ID:
gswip_mii_mask_pcdu(priv, GSWIP_MII_PCDU_TXDLY_MASK |
GSWIP_MII_PCDU_RXDLY_MASK, 0, port);
break;
case PHY_INTERFACE_MODE_RGMII_RXID:
gswip_mii_mask_pcdu(priv, GSWIP_MII_PCDU_RXDLY_MASK, 0, port);
break;
case PHY_INTERFACE_MODE_RGMII_TXID:
gswip_mii_mask_pcdu(priv, GSWIP_MII_PCDU_TXDLY_MASK, 0, port);
break;
default:
break;
}
}
static void gswip_phylink_mac_link_down(struct dsa_switch *ds, int port,
unsigned int mode,
phy_interface_t interface)
{
struct gswip_priv *priv = ds->priv;
gswip_mii_mask_cfg(priv, GSWIP_MII_CFG_EN, 0, port);
}
static void gswip_phylink_mac_link_up(struct dsa_switch *ds, int port,
unsigned int mode,
phy_interface_t interface,
struct phy_device *phydev)
{
struct gswip_priv *priv = ds->priv;
/* Enable the xMII interface only for the external PHY */
if (interface != PHY_INTERFACE_MODE_INTERNAL)
gswip_mii_mask_cfg(priv, 0, GSWIP_MII_CFG_EN, port);
}
static void gswip_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(gswip_rmon_cnt); i++)
strncpy(data + i * ETH_GSTRING_LEN, gswip_rmon_cnt[i].name,
ETH_GSTRING_LEN);
}
static u32 gswip_bcm_ram_entry_read(struct gswip_priv *priv, u32 table,
u32 index)
{
u32 result;
int err;
gswip_switch_w(priv, index, GSWIP_BM_RAM_ADDR);
gswip_switch_mask(priv, GSWIP_BM_RAM_CTRL_ADDR_MASK |
GSWIP_BM_RAM_CTRL_OPMOD,
table | GSWIP_BM_RAM_CTRL_BAS,
GSWIP_BM_RAM_CTRL);
err = gswip_switch_r_timeout(priv, GSWIP_BM_RAM_CTRL,
GSWIP_BM_RAM_CTRL_BAS);
if (err) {
dev_err(priv->dev, "timeout while reading table: %u, index: %u",
table, index);
return 0;
}
result = gswip_switch_r(priv, GSWIP_BM_RAM_VAL(0));
result |= gswip_switch_r(priv, GSWIP_BM_RAM_VAL(1)) << 16;
return result;
}
static void gswip_get_ethtool_stats(struct dsa_switch *ds, int port,
uint64_t *data)
{
struct gswip_priv *priv = ds->priv;
const struct gswip_rmon_cnt_desc *rmon_cnt;
int i;
u64 high;
for (i = 0; i < ARRAY_SIZE(gswip_rmon_cnt); i++) {
rmon_cnt = &gswip_rmon_cnt[i];
data[i] = gswip_bcm_ram_entry_read(priv, port,
rmon_cnt->offset);
if (rmon_cnt->size == 2) {
high = gswip_bcm_ram_entry_read(priv, port,
rmon_cnt->offset + 1);
data[i] |= high << 32;
}
}
}
static int gswip_get_sset_count(struct dsa_switch *ds, int port, int sset)
{
if (sset != ETH_SS_STATS)
return 0;
return ARRAY_SIZE(gswip_rmon_cnt);
}
static const struct dsa_switch_ops gswip_switch_ops = {
.get_tag_protocol = gswip_get_tag_protocol,
.setup = gswip_setup,
.port_enable = gswip_port_enable,
.port_disable = gswip_port_disable,
.phylink_validate = gswip_phylink_validate,
.phylink_mac_config = gswip_phylink_mac_config,
.phylink_mac_link_down = gswip_phylink_mac_link_down,
.phylink_mac_link_up = gswip_phylink_mac_link_up,
.get_strings = gswip_get_strings,
.get_ethtool_stats = gswip_get_ethtool_stats,
.get_sset_count = gswip_get_sset_count,
};
static const struct xway_gphy_match_data xrx200a1x_gphy_data = {
.fe_firmware_name = "lantiq/xrx200_phy22f_a14.bin",
.ge_firmware_name = "lantiq/xrx200_phy11g_a14.bin",
};
static const struct xway_gphy_match_data xrx200a2x_gphy_data = {
.fe_firmware_name = "lantiq/xrx200_phy22f_a22.bin",
.ge_firmware_name = "lantiq/xrx200_phy11g_a22.bin",
};
static const struct xway_gphy_match_data xrx300_gphy_data = {
.fe_firmware_name = "lantiq/xrx300_phy22f_a21.bin",
.ge_firmware_name = "lantiq/xrx300_phy11g_a21.bin",
};
static const struct of_device_id xway_gphy_match[] = {
{ .compatible = "lantiq,xrx200-gphy-fw", .data = NULL },
{ .compatible = "lantiq,xrx200a1x-gphy-fw", .data = &xrx200a1x_gphy_data },
{ .compatible = "lantiq,xrx200a2x-gphy-fw", .data = &xrx200a2x_gphy_data },
{ .compatible = "lantiq,xrx300-gphy-fw", .data = &xrx300_gphy_data },
{ .compatible = "lantiq,xrx330-gphy-fw", .data = &xrx300_gphy_data },
{},
};
static int gswip_gphy_fw_load(struct gswip_priv *priv, struct gswip_gphy_fw *gphy_fw)
{
struct device *dev = priv->dev;
const struct firmware *fw;
void *fw_addr;
dma_addr_t dma_addr;
dma_addr_t dev_addr;
size_t size;
int ret;
ret = clk_prepare_enable(gphy_fw->clk_gate);
if (ret)
return ret;
reset_control_assert(gphy_fw->reset);
ret = request_firmware(&fw, gphy_fw->fw_name, dev);
if (ret) {
dev_err(dev, "failed to load firmware: %s, error: %i\n",
gphy_fw->fw_name, ret);
return ret;
}
/* GPHY cores need the firmware code in a persistent and contiguous
* memory area with a 16 kB boundary aligned start address.
*/
size = fw->size + XRX200_GPHY_FW_ALIGN;
fw_addr = dmam_alloc_coherent(dev, size, &dma_addr, GFP_KERNEL);
if (fw_addr) {
fw_addr = PTR_ALIGN(fw_addr, XRX200_GPHY_FW_ALIGN);
dev_addr = ALIGN(dma_addr, XRX200_GPHY_FW_ALIGN);
memcpy(fw_addr, fw->data, fw->size);
} else {
dev_err(dev, "failed to alloc firmware memory\n");
release_firmware(fw);
return -ENOMEM;
}
release_firmware(fw);
ret = regmap_write(priv->rcu_regmap, gphy_fw->fw_addr_offset, dev_addr);
if (ret)
return ret;
reset_control_deassert(gphy_fw->reset);
return ret;
}
static int gswip_gphy_fw_probe(struct gswip_priv *priv,
struct gswip_gphy_fw *gphy_fw,
struct device_node *gphy_fw_np, int i)
{
struct device *dev = priv->dev;
u32 gphy_mode;
int ret;
char gphyname[10];
snprintf(gphyname, sizeof(gphyname), "gphy%d", i);
gphy_fw->clk_gate = devm_clk_get(dev, gphyname);
if (IS_ERR(gphy_fw->clk_gate)) {
dev_err(dev, "Failed to lookup gate clock\n");
return PTR_ERR(gphy_fw->clk_gate);
}
ret = of_property_read_u32(gphy_fw_np, "reg", &gphy_fw->fw_addr_offset);
if (ret)
return ret;
ret = of_property_read_u32(gphy_fw_np, "lantiq,gphy-mode", &gphy_mode);
/* Default to GE mode */
if (ret)
gphy_mode = GPHY_MODE_GE;
switch (gphy_mode) {
case GPHY_MODE_FE:
gphy_fw->fw_name = priv->gphy_fw_name_cfg->fe_firmware_name;
break;
case GPHY_MODE_GE:
gphy_fw->fw_name = priv->gphy_fw_name_cfg->ge_firmware_name;
break;
default:
dev_err(dev, "Unknown GPHY mode %d\n", gphy_mode);
return -EINVAL;
}
gphy_fw->reset = of_reset_control_array_get_exclusive(gphy_fw_np);
if (IS_ERR(gphy_fw->reset)) {
if (PTR_ERR(gphy_fw->reset) != -EPROBE_DEFER)
dev_err(dev, "Failed to lookup gphy reset\n");
return PTR_ERR(gphy_fw->reset);
}
return gswip_gphy_fw_load(priv, gphy_fw);
}
static void gswip_gphy_fw_remove(struct gswip_priv *priv,
struct gswip_gphy_fw *gphy_fw)
{
int ret;
/* check if the device was fully probed */
if (!gphy_fw->fw_name)
return;
ret = regmap_write(priv->rcu_regmap, gphy_fw->fw_addr_offset, 0);
if (ret)
dev_err(priv->dev, "can not reset GPHY FW pointer");
clk_disable_unprepare(gphy_fw->clk_gate);
reset_control_put(gphy_fw->reset);
}
static int gswip_gphy_fw_list(struct gswip_priv *priv,
struct device_node *gphy_fw_list_np, u32 version)
{
struct device *dev = priv->dev;
struct device_node *gphy_fw_np;
const struct of_device_id *match;
int err;
int i = 0;
/* The VRX200 rev 1.1 uses the GSWIP 2.0 and needs the older
* GPHY firmware. The VRX200 rev 1.2 uses the GSWIP 2.1 and also
* needs a different GPHY firmware.
*/
if (of_device_is_compatible(gphy_fw_list_np, "lantiq,xrx200-gphy-fw")) {
switch (version) {
case GSWIP_VERSION_2_0:
priv->gphy_fw_name_cfg = &xrx200a1x_gphy_data;
break;
case GSWIP_VERSION_2_1:
priv->gphy_fw_name_cfg = &xrx200a2x_gphy_data;
break;
default:
dev_err(dev, "unknown GSWIP version: 0x%x", version);
return -ENOENT;
}
}
match = of_match_node(xway_gphy_match, gphy_fw_list_np);
if (match && match->data)
priv->gphy_fw_name_cfg = match->data;
if (!priv->gphy_fw_name_cfg) {
dev_err(dev, "GPHY compatible type not supported");
return -ENOENT;
}
priv->num_gphy_fw = of_get_available_child_count(gphy_fw_list_np);
if (!priv->num_gphy_fw)
return -ENOENT;
priv->rcu_regmap = syscon_regmap_lookup_by_phandle(gphy_fw_list_np,
"lantiq,rcu");
if (IS_ERR(priv->rcu_regmap))
return PTR_ERR(priv->rcu_regmap);
priv->gphy_fw = devm_kmalloc_array(dev, priv->num_gphy_fw,
sizeof(*priv->gphy_fw),
GFP_KERNEL | __GFP_ZERO);
if (!priv->gphy_fw)
return -ENOMEM;
for_each_available_child_of_node(gphy_fw_list_np, gphy_fw_np) {
err = gswip_gphy_fw_probe(priv, &priv->gphy_fw[i],
gphy_fw_np, i);
if (err)
goto remove_gphy;
i++;
}
return 0;
remove_gphy:
for (i = 0; i < priv->num_gphy_fw; i++)
gswip_gphy_fw_remove(priv, &priv->gphy_fw[i]);
return err;
}
static int gswip_probe(struct platform_device *pdev)
{
struct gswip_priv *priv;
struct resource *gswip_res, *mdio_res, *mii_res;
struct device_node *mdio_np, *gphy_fw_np;
struct device *dev = &pdev->dev;
int err;
int i;
u32 version;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
gswip_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
priv->gswip = devm_ioremap_resource(dev, gswip_res);
if (IS_ERR(priv->gswip))
return PTR_ERR(priv->gswip);
mdio_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
priv->mdio = devm_ioremap_resource(dev, mdio_res);
if (IS_ERR(priv->mdio))
return PTR_ERR(priv->mdio);
mii_res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
priv->mii = devm_ioremap_resource(dev, mii_res);
if (IS_ERR(priv->mii))
return PTR_ERR(priv->mii);
priv->hw_info = of_device_get_match_data(dev);
if (!priv->hw_info)
return -EINVAL;
priv->ds = dsa_switch_alloc(dev, priv->hw_info->max_ports);
if (!priv->ds)
return -ENOMEM;
priv->ds->priv = priv;
priv->ds->ops = &gswip_switch_ops;
priv->dev = dev;
version = gswip_switch_r(priv, GSWIP_VERSION);
/* bring up the mdio bus */
gphy_fw_np = of_find_compatible_node(pdev->dev.of_node, NULL,
"lantiq,gphy-fw");
if (gphy_fw_np) {
err = gswip_gphy_fw_list(priv, gphy_fw_np, version);
if (err) {
dev_err(dev, "gphy fw probe failed\n");
return err;
}
}
/* bring up the mdio bus */
mdio_np = of_find_compatible_node(pdev->dev.of_node, NULL,
"lantiq,xrx200-mdio");
if (mdio_np) {
err = gswip_mdio(priv, mdio_np);
if (err) {
dev_err(dev, "mdio probe failed\n");
goto gphy_fw;
}
}
err = dsa_register_switch(priv->ds);
if (err) {
dev_err(dev, "dsa switch register failed: %i\n", err);
goto mdio_bus;
}
if (!dsa_is_cpu_port(priv->ds, priv->hw_info->cpu_port)) {
dev_err(dev, "wrong CPU port defined, HW only supports port: %i",
priv->hw_info->cpu_port);
err = -EINVAL;
goto mdio_bus;
}
platform_set_drvdata(pdev, priv);
dev_info(dev, "probed GSWIP version %lx mod %lx\n",
(version & GSWIP_VERSION_REV_MASK) >> GSWIP_VERSION_REV_SHIFT,
(version & GSWIP_VERSION_MOD_MASK) >> GSWIP_VERSION_MOD_SHIFT);
return 0;
mdio_bus:
if (mdio_np)
mdiobus_unregister(priv->ds->slave_mii_bus);
gphy_fw:
for (i = 0; i < priv->num_gphy_fw; i++)
gswip_gphy_fw_remove(priv, &priv->gphy_fw[i]);
return err;
}
static int gswip_remove(struct platform_device *pdev)
{
struct gswip_priv *priv = platform_get_drvdata(pdev);
int i;
if (!priv)
return 0;
/* disable the switch */
gswip_mdio_mask(priv, GSWIP_MDIO_GLOB_ENABLE, 0, GSWIP_MDIO_GLOB);
dsa_unregister_switch(priv->ds);
if (priv->ds->slave_mii_bus)
mdiobus_unregister(priv->ds->slave_mii_bus);
for (i = 0; i < priv->num_gphy_fw; i++)
gswip_gphy_fw_remove(priv, &priv->gphy_fw[i]);
return 0;
}
static const struct gswip_hw_info gswip_xrx200 = {
.max_ports = 7,
.cpu_port = 6,
};
static const struct of_device_id gswip_of_match[] = {
{ .compatible = "lantiq,xrx200-gswip", .data = &gswip_xrx200 },
{},
};
MODULE_DEVICE_TABLE(of, gswip_of_match);
static struct platform_driver gswip_driver = {
.probe = gswip_probe,
.remove = gswip_remove,
.driver = {
.name = "gswip",
.of_match_table = gswip_of_match,
},
};
module_platform_driver(gswip_driver);
MODULE_AUTHOR("Hauke Mehrtens <hauke@hauke-m.de>");
MODULE_DESCRIPTION("Lantiq / Intel GSWIP driver");
MODULE_LICENSE("GPL v2");
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