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bcm_sf2.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Broadcom Starfighter 2 DSA switch driver
*
* Copyright (C) 2014, Broadcom Corporation
*/
#include <linux/list.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/phylink.h>
#include <linux/mii.h>
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/of_net.h>
#include <linux/of_mdio.h>
#include <net/dsa.h>
#include <linux/ethtool.h>
#include <linux/if_bridge.h>
#include <linux/brcmphy.h>
#include <linux/etherdevice.h>
#include <linux/platform_data/b53.h>
#include "bcm_sf2.h"
#include "bcm_sf2_regs.h"
#include "b53/b53_priv.h"
#include "b53/b53_regs.h"
static u16 bcm_sf2_reg_rgmii_cntrl(struct bcm_sf2_priv *priv, int port)
{
switch (priv->type) {
case BCM4908_DEVICE_ID:
switch (port) {
case 7:
return REG_RGMII_11_CNTRL;
default:
break;
}
break;
default:
switch (port) {
case 0:
return REG_RGMII_0_CNTRL;
case 1:
return REG_RGMII_1_CNTRL;
case 2:
return REG_RGMII_2_CNTRL;
default:
break;
}
}
WARN_ONCE(1, "Unsupported port %d\n", port);
/* RO fallback reg */
return REG_SWITCH_STATUS;
}
static u16 bcm_sf2_reg_led_base(struct bcm_sf2_priv *priv, int port)
{
switch (port) {
case 0:
return REG_LED_0_CNTRL;
case 1:
return REG_LED_1_CNTRL;
case 2:
return REG_LED_2_CNTRL;
}
switch (priv->type) {
case BCM4908_DEVICE_ID:
switch (port) {
case 3:
return REG_LED_3_CNTRL;
case 7:
return REG_LED_4_CNTRL;
default:
break;
}
break;
default:
break;
}
WARN_ONCE(1, "Unsupported port %d\n", port);
/* RO fallback reg */
return REG_SWITCH_STATUS;
}
static u32 bcm_sf2_port_override_offset(struct bcm_sf2_priv *priv, int port)
{
switch (priv->type) {
case BCM4908_DEVICE_ID:
case BCM7445_DEVICE_ID:
return port == 8 ? CORE_STS_OVERRIDE_IMP :
CORE_STS_OVERRIDE_GMIIP_PORT(port);
case BCM7278_DEVICE_ID:
return port == 8 ? CORE_STS_OVERRIDE_IMP2 :
CORE_STS_OVERRIDE_GMIIP2_PORT(port);
default:
WARN_ONCE(1, "Unsupported device: %d\n", priv->type);
}
/* RO fallback register */
return REG_SWITCH_STATUS;
}
/* Return the number of active ports, not counting the IMP (CPU) port */
static unsigned int bcm_sf2_num_active_ports(struct dsa_switch *ds)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
unsigned int port, count = 0;
for (port = 0; port < ds->num_ports; port++) {
if (dsa_is_cpu_port(ds, port))
continue;
if (priv->port_sts[port].enabled)
count++;
}
return count;
}
static void bcm_sf2_recalc_clock(struct dsa_switch *ds)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
unsigned long new_rate;
unsigned int ports_active;
/* Frequenty in Mhz */
static const unsigned long rate_table[] = {
59220000,
60820000,
62500000,
62500000,
};
ports_active = bcm_sf2_num_active_ports(ds);
if (ports_active == 0 || !priv->clk_mdiv)
return;
/* If we overflow our table, just use the recommended operational
* frequency
*/
if (ports_active > ARRAY_SIZE(rate_table))
new_rate = 90000000;
else
new_rate = rate_table[ports_active - 1];
clk_set_rate(priv->clk_mdiv, new_rate);
}
static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
unsigned int i;
u32 reg;
/* Enable the port memories */
reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
reg &= ~P_TXQ_PSM_VDD(port);
core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
/* Enable forwarding */
core_writel(priv, SW_FWDG_EN, CORE_SWMODE);
/* Enable IMP port in dumb mode */
reg = core_readl(priv, CORE_SWITCH_CTRL);
reg |= MII_DUMB_FWDG_EN;
core_writel(priv, reg, CORE_SWITCH_CTRL);
/* Configure Traffic Class to QoS mapping, allow each priority to map
* to a different queue number
*/
reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port));
for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++)
reg |= i << (PRT_TO_QID_SHIFT * i);
core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port));
b53_brcm_hdr_setup(ds, port);
if (port == 8) {
/* Enable Broadcast, Multicast, Unicast forwarding to IMP port */
reg = core_readl(priv, CORE_IMP_CTL);
reg |= (RX_BCST_EN | RX_MCST_EN | RX_UCST_EN);
reg &= ~(RX_DIS | TX_DIS);
core_writel(priv, reg, CORE_IMP_CTL);
} else {
reg = core_readl(priv, CORE_G_PCTL_PORT(port));
reg &= ~(RX_DIS | TX_DIS);
core_writel(priv, reg, CORE_G_PCTL_PORT(port));
}
priv->port_sts[port].enabled = true;
}
static void bcm_sf2_gphy_enable_set(struct dsa_switch *ds, bool enable)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
u32 reg;
reg = reg_readl(priv, REG_SPHY_CNTRL);
if (enable) {
reg |= PHY_RESET;
reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS | IDDQ_GLOBAL_PWR | CK25_DIS);
reg_writel(priv, reg, REG_SPHY_CNTRL);
udelay(21);
reg = reg_readl(priv, REG_SPHY_CNTRL);
reg &= ~PHY_RESET;
} else {
reg |= EXT_PWR_DOWN | IDDQ_BIAS | PHY_RESET;
reg_writel(priv, reg, REG_SPHY_CNTRL);
mdelay(1);
reg |= CK25_DIS;
}
reg_writel(priv, reg, REG_SPHY_CNTRL);
/* Use PHY-driven LED signaling */
if (!enable) {
u16 led_ctrl = bcm_sf2_reg_led_base(priv, 0);
if (priv->type == BCM7278_DEVICE_ID ||
priv->type == BCM7445_DEVICE_ID) {
reg = reg_led_readl(priv, led_ctrl, 0);
reg |= LED_CNTRL_SPDLNK_SRC_SEL;
reg_led_writel(priv, reg, led_ctrl, 0);
}
}
}
static inline void bcm_sf2_port_intr_enable(struct bcm_sf2_priv *priv,
int port)
{
unsigned int off;
switch (port) {
case 7:
off = P7_IRQ_OFF;
break;
case 0:
/* Port 0 interrupts are located on the first bank */
intrl2_0_mask_clear(priv, P_IRQ_MASK(P0_IRQ_OFF));
return;
default:
off = P_IRQ_OFF(port);
break;
}
intrl2_1_mask_clear(priv, P_IRQ_MASK(off));
}
static inline void bcm_sf2_port_intr_disable(struct bcm_sf2_priv *priv,
int port)
{
unsigned int off;
switch (port) {
case 7:
off = P7_IRQ_OFF;
break;
case 0:
/* Port 0 interrupts are located on the first bank */
intrl2_0_mask_set(priv, P_IRQ_MASK(P0_IRQ_OFF));
intrl2_0_writel(priv, P_IRQ_MASK(P0_IRQ_OFF), INTRL2_CPU_CLEAR);
return;
default:
off = P_IRQ_OFF(port);
break;
}
intrl2_1_mask_set(priv, P_IRQ_MASK(off));
intrl2_1_writel(priv, P_IRQ_MASK(off), INTRL2_CPU_CLEAR);
}
static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
struct phy_device *phy)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
unsigned int i;
u32 reg;
if (!dsa_is_user_port(ds, port))
return 0;
priv->port_sts[port].enabled = true;
bcm_sf2_recalc_clock(ds);
/* Clear the memory power down */
reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
reg &= ~P_TXQ_PSM_VDD(port);
core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
/* Enable Broadcom tags for that port if requested */
if (priv->brcm_tag_mask & BIT(port))
b53_brcm_hdr_setup(ds, port);
/* Configure Traffic Class to QoS mapping, allow each priority to map
* to a different queue number
*/
reg = core_readl(priv, CORE_PORT_TC2_QOS_MAP_PORT(port));
for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++)
reg |= i << (PRT_TO_QID_SHIFT * i);
core_writel(priv, reg, CORE_PORT_TC2_QOS_MAP_PORT(port));
/* Re-enable the GPHY and re-apply workarounds */
if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1) {
bcm_sf2_gphy_enable_set(ds, true);
if (phy) {
/* if phy_stop() has been called before, phy
* will be in halted state, and phy_start()
* will call resume.
*
* the resume path does not configure back
* autoneg settings, and since we hard reset
* the phy manually here, we need to reset the
* state machine also.
*/
phy->state = PHY_READY;
phy_init_hw(phy);
}
}
/* Enable MoCA port interrupts to get notified */
if (port == priv->moca_port)
bcm_sf2_port_intr_enable(priv, port);
/* Set per-queue pause threshold to 32 */
core_writel(priv, 32, CORE_TXQ_THD_PAUSE_QN_PORT(port));
/* Set ACB threshold to 24 */
for (i = 0; i < SF2_NUM_EGRESS_QUEUES; i++) {
reg = acb_readl(priv, ACB_QUEUE_CFG(port *
SF2_NUM_EGRESS_QUEUES + i));
reg &= ~XOFF_THRESHOLD_MASK;
reg |= 24;
acb_writel(priv, reg, ACB_QUEUE_CFG(port *
SF2_NUM_EGRESS_QUEUES + i));
}
return b53_enable_port(ds, port, phy);
}
static void bcm_sf2_port_disable(struct dsa_switch *ds, int port)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
u32 reg;
/* Disable learning while in WoL mode */
if (priv->wol_ports_mask & (1 << port)) {
reg = core_readl(priv, CORE_DIS_LEARN);
reg |= BIT(port);
core_writel(priv, reg, CORE_DIS_LEARN);
return;
}
if (port == priv->moca_port)
bcm_sf2_port_intr_disable(priv, port);
if (priv->int_phy_mask & 1 << port && priv->hw_params.num_gphy == 1)
bcm_sf2_gphy_enable_set(ds, false);
b53_disable_port(ds, port);
/* Power down the port memory */
reg = core_readl(priv, CORE_MEM_PSM_VDD_CTRL);
reg |= P_TXQ_PSM_VDD(port);
core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
priv->port_sts[port].enabled = false;
bcm_sf2_recalc_clock(ds);
}
static int bcm_sf2_sw_indir_rw(struct bcm_sf2_priv *priv, int op, int addr,
int regnum, u16 val)
{
int ret = 0;
u32 reg;
reg = reg_readl(priv, REG_SWITCH_CNTRL);
reg |= MDIO_MASTER_SEL;
reg_writel(priv, reg, REG_SWITCH_CNTRL);
/* Page << 8 | offset */
reg = 0x70;
reg <<= 2;
core_writel(priv, addr, reg);
/* Page << 8 | offset */
reg = 0x80 << 8 | regnum << 1;
reg <<= 2;
if (op)
ret = core_readl(priv, reg);
else
core_writel(priv, val, reg);
reg = reg_readl(priv, REG_SWITCH_CNTRL);
reg &= ~MDIO_MASTER_SEL;
reg_writel(priv, reg, REG_SWITCH_CNTRL);
return ret & 0xffff;
}
static int bcm_sf2_sw_mdio_read(struct mii_bus *bus, int addr, int regnum)
{
struct bcm_sf2_priv *priv = bus->priv;
/* Intercept reads from Broadcom pseudo-PHY address, else, send
* them to our master MDIO bus controller
*/
if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr))
return bcm_sf2_sw_indir_rw(priv, 1, addr, regnum, 0);
else
return mdiobus_read_nested(priv->master_mii_bus, addr, regnum);
}
static int bcm_sf2_sw_mdio_write(struct mii_bus *bus, int addr, int regnum,
u16 val)
{
struct bcm_sf2_priv *priv = bus->priv;
/* Intercept writes to the Broadcom pseudo-PHY address, else,
* send them to our master MDIO bus controller
*/
if (addr == BRCM_PSEUDO_PHY_ADDR && priv->indir_phy_mask & BIT(addr))
return bcm_sf2_sw_indir_rw(priv, 0, addr, regnum, val);
else
return mdiobus_write_nested(priv->master_mii_bus, addr,
regnum, val);
}
static irqreturn_t bcm_sf2_switch_0_isr(int irq, void *dev_id)
{
struct dsa_switch *ds = dev_id;
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
priv->irq0_stat = intrl2_0_readl(priv, INTRL2_CPU_STATUS) &
~priv->irq0_mask;
intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
return IRQ_HANDLED;
}
static irqreturn_t bcm_sf2_switch_1_isr(int irq, void *dev_id)
{
struct dsa_switch *ds = dev_id;
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
priv->irq1_stat = intrl2_1_readl(priv, INTRL2_CPU_STATUS) &
~priv->irq1_mask;
intrl2_1_writel(priv, priv->irq1_stat, INTRL2_CPU_CLEAR);
if (priv->irq1_stat & P_LINK_UP_IRQ(P7_IRQ_OFF)) {
priv->port_sts[7].link = true;
dsa_port_phylink_mac_change(ds, 7, true);
}
if (priv->irq1_stat & P_LINK_DOWN_IRQ(P7_IRQ_OFF)) {
priv->port_sts[7].link = false;
dsa_port_phylink_mac_change(ds, 7, false);
}
return IRQ_HANDLED;
}
static int bcm_sf2_sw_rst(struct bcm_sf2_priv *priv)
{
unsigned int timeout = 1000;
u32 reg;
int ret;
/* The watchdog reset does not work on 7278, we need to hit the
* "external" reset line through the reset controller.
*/
if (priv->type == BCM7278_DEVICE_ID) {
ret = reset_control_assert(priv->rcdev);
if (ret)
return ret;
return reset_control_deassert(priv->rcdev);
}
reg = core_readl(priv, CORE_WATCHDOG_CTRL);
reg |= SOFTWARE_RESET | EN_CHIP_RST | EN_SW_RESET;
core_writel(priv, reg, CORE_WATCHDOG_CTRL);
do {
reg = core_readl(priv, CORE_WATCHDOG_CTRL);
if (!(reg & SOFTWARE_RESET))
break;
usleep_range(1000, 2000);
} while (timeout-- > 0);
if (timeout == 0)
return -ETIMEDOUT;
return 0;
}
static void bcm_sf2_crossbar_setup(struct bcm_sf2_priv *priv)
{
struct device *dev = priv->dev->ds->dev;
int shift;
u32 mask;
u32 reg;
int i;
mask = BIT(priv->num_crossbar_ext_bits) - 1;
reg = reg_readl(priv, REG_CROSSBAR);
switch (priv->type) {
case BCM4908_DEVICE_ID:
shift = CROSSBAR_BCM4908_INT_P7 * priv->num_crossbar_ext_bits;
reg &= ~(mask << shift);
if (0) /* FIXME */
reg |= CROSSBAR_BCM4908_EXT_SERDES << shift;
else if (priv->int_phy_mask & BIT(7))
reg |= CROSSBAR_BCM4908_EXT_GPHY4 << shift;
else if (phy_interface_mode_is_rgmii(priv->port_sts[7].mode))
reg |= CROSSBAR_BCM4908_EXT_RGMII << shift;
else if (WARN(1, "Invalid port mode\n"))
return;
break;
default:
return;
}
reg_writel(priv, reg, REG_CROSSBAR);
reg = reg_readl(priv, REG_CROSSBAR);
for (i = 0; i < priv->num_crossbar_int_ports; i++) {
shift = i * priv->num_crossbar_ext_bits;
dev_dbg(dev, "crossbar int port #%d - ext port #%d\n", i,
(reg >> shift) & mask);
}
}
static void bcm_sf2_intr_disable(struct bcm_sf2_priv *priv)
{
intrl2_0_mask_set(priv, 0xffffffff);
intrl2_0_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
intrl2_1_mask_set(priv, 0xffffffff);
intrl2_1_writel(priv, 0xffffffff, INTRL2_CPU_CLEAR);
}
static void bcm_sf2_identify_ports(struct bcm_sf2_priv *priv,
struct device_node *dn)
{
struct device *dev = priv->dev->ds->dev;
struct bcm_sf2_port_status *port_st;
struct device_node *port;
unsigned int port_num;
struct property *prop;
int err;
priv->moca_port = -1;
for_each_available_child_of_node(dn, port) {
if (of_property_read_u32(port, "reg", &port_num))
continue;
if (port_num >= DSA_MAX_PORTS) {
dev_err(dev, "Invalid port number %d\n", port_num);
continue;
}
port_st = &priv->port_sts[port_num];
/* Internal PHYs get assigned a specific 'phy-mode' property
* value: "internal" to help flag them before MDIO probing
* has completed, since they might be turned off at that
* time
*/
err = of_get_phy_mode(port, &port_st->mode);
if (err)
continue;
if (port_st->mode == PHY_INTERFACE_MODE_INTERNAL)
priv->int_phy_mask |= 1 << port_num;
if (port_st->mode == PHY_INTERFACE_MODE_MOCA)
priv->moca_port = port_num;
if (of_property_read_bool(port, "brcm,use-bcm-hdr"))
priv->brcm_tag_mask |= 1 << port_num;
/* Ensure that port 5 is not picked up as a DSA CPU port
* flavour but a regular port instead. We should be using
* devlink to be able to set the port flavour.
*/
if (port_num == 5 && priv->type == BCM7278_DEVICE_ID) {
prop = of_find_property(port, "ethernet", NULL);
if (prop)
of_remove_property(port, prop);
}
}
}
static int bcm_sf2_mdio_register(struct dsa_switch *ds)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
struct device_node *dn, *child;
struct phy_device *phydev;
struct property *prop;
static int index;
int err, reg;
/* Find our integrated MDIO bus node */
dn = of_find_compatible_node(NULL, NULL, "brcm,unimac-mdio");
priv->master_mii_bus = of_mdio_find_bus(dn);
if (!priv->master_mii_bus) {
err = -EPROBE_DEFER;
goto err_of_node_put;
}
priv->user_mii_bus = mdiobus_alloc();
if (!priv->user_mii_bus) {
err = -ENOMEM;
goto err_put_master_mii_bus_dev;
}
priv->user_mii_bus->priv = priv;
priv->user_mii_bus->name = "sf2 user mii";
priv->user_mii_bus->read = bcm_sf2_sw_mdio_read;
priv->user_mii_bus->write = bcm_sf2_sw_mdio_write;
snprintf(priv->user_mii_bus->id, MII_BUS_ID_SIZE, "sf2-%d",
index++);
/* Include the pseudo-PHY address to divert reads towards our
* workaround. This is only required for 7445D0, since 7445E0
* disconnects the internal switch pseudo-PHY such that we can use the
* regular SWITCH_MDIO master controller instead.
*
* Here we flag the pseudo PHY as needing special treatment and would
* otherwise make all other PHY read/writes go to the master MDIO bus
* controller that comes with this switch backed by the "mdio-unimac"
* driver.
*/
if (of_machine_is_compatible("brcm,bcm7445d0"))
priv->indir_phy_mask |= (1 << BRCM_PSEUDO_PHY_ADDR) | (1 << 0);
else
priv->indir_phy_mask = 0;
ds->phys_mii_mask = priv->indir_phy_mask;
ds->user_mii_bus = priv->user_mii_bus;
priv->user_mii_bus->parent = ds->dev->parent;
priv->user_mii_bus->phy_mask = ~priv->indir_phy_mask;
/* We need to make sure that of_phy_connect() will not work by
* removing the 'phandle' and 'linux,phandle' properties and
* unregister the existing PHY device that was already registered.
*/
for_each_available_child_of_node(dn, child) {
if (of_property_read_u32(child, "reg", ®) ||
reg >= PHY_MAX_ADDR)
continue;
if (!(priv->indir_phy_mask & BIT(reg)))
continue;
prop = of_find_property(child, "phandle", NULL);
if (prop)
of_remove_property(child, prop);
prop = of_find_property(child, "linux,phandle", NULL);
if (prop)
of_remove_property(child, prop);
phydev = of_phy_find_device(child);
if (phydev) {
phy_device_remove(phydev);
phy_device_free(phydev);
}
}
err = mdiobus_register(priv->user_mii_bus);
if (err)
goto err_free_user_mii_bus;
of_node_put(dn);
return 0;
err_free_user_mii_bus:
mdiobus_free(priv->user_mii_bus);
err_put_master_mii_bus_dev:
put_device(&priv->master_mii_bus->dev);
err_of_node_put:
of_node_put(dn);
return err;
}
static void bcm_sf2_mdio_unregister(struct bcm_sf2_priv *priv)
{
mdiobus_unregister(priv->user_mii_bus);
mdiobus_free(priv->user_mii_bus);
put_device(&priv->master_mii_bus->dev);
}
static u32 bcm_sf2_sw_get_phy_flags(struct dsa_switch *ds, int port)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
/* The BCM7xxx PHY driver expects to find the integrated PHY revision
* in bits 15:8 and the patch level in bits 7:0 which is exactly what
* the REG_PHY_REVISION register layout is.
*/
if (priv->int_phy_mask & BIT(port))
return priv->hw_params.gphy_rev;
else
return PHY_BRCM_AUTO_PWRDWN_ENABLE |
PHY_BRCM_DIS_TXCRXC_NOENRGY |
PHY_BRCM_IDDQ_SUSPEND;
}
static void bcm_sf2_sw_get_caps(struct dsa_switch *ds, int port,
struct phylink_config *config)
{
unsigned long *interfaces = config->supported_interfaces;
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
if (priv->int_phy_mask & BIT(port)) {
__set_bit(PHY_INTERFACE_MODE_INTERNAL, interfaces);
} else if (priv->moca_port == port) {
__set_bit(PHY_INTERFACE_MODE_MOCA, interfaces);
} else {
__set_bit(PHY_INTERFACE_MODE_MII, interfaces);
__set_bit(PHY_INTERFACE_MODE_REVMII, interfaces);
__set_bit(PHY_INTERFACE_MODE_GMII, interfaces);
phy_interface_set_rgmii(interfaces);
}
config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
MAC_10 | MAC_100 | MAC_1000;
}
static void bcm_sf2_sw_mac_config(struct phylink_config *config,
unsigned int mode,
const struct phylink_link_state *state)
{
struct dsa_port *dp = dsa_phylink_to_port(config);
u32 id_mode_dis = 0, port_mode;
struct bcm_sf2_priv *priv;
u32 reg_rgmii_ctrl;
u32 reg;
priv = bcm_sf2_to_priv(dp->ds);
if (dp->index == core_readl(priv, CORE_IMP0_PRT_ID))
return;
switch (state->interface) {
case PHY_INTERFACE_MODE_RGMII:
id_mode_dis = 1;
fallthrough;
case PHY_INTERFACE_MODE_RGMII_TXID:
port_mode = EXT_GPHY;
break;
case PHY_INTERFACE_MODE_MII:
port_mode = EXT_EPHY;
break;
case PHY_INTERFACE_MODE_REVMII:
port_mode = EXT_REVMII;
break;
default:
/* Nothing required for all other PHYs: internal and MoCA */
return;
}
reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, dp->index);
/* Clear id_mode_dis bit, and the existing port mode, let
* RGMII_MODE_EN bet set by mac_link_{up,down}
*/
reg = reg_readl(priv, reg_rgmii_ctrl);
reg &= ~ID_MODE_DIS;
reg &= ~(PORT_MODE_MASK << PORT_MODE_SHIFT);
reg |= port_mode;
if (id_mode_dis)
reg |= ID_MODE_DIS;
reg_writel(priv, reg, reg_rgmii_ctrl);
}
static void bcm_sf2_sw_mac_link_set(struct dsa_switch *ds, int port,
phy_interface_t interface, bool link)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
u32 reg_rgmii_ctrl;
u32 reg;
if (!phy_interface_mode_is_rgmii(interface) &&
interface != PHY_INTERFACE_MODE_MII &&
interface != PHY_INTERFACE_MODE_REVMII)
return;
reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, port);
/* If the link is down, just disable the interface to conserve power */
reg = reg_readl(priv, reg_rgmii_ctrl);
if (link)
reg |= RGMII_MODE_EN;
else
reg &= ~RGMII_MODE_EN;
reg_writel(priv, reg, reg_rgmii_ctrl);
}
static void bcm_sf2_sw_mac_link_down(struct phylink_config *config,
unsigned int mode,
phy_interface_t interface)
{
struct dsa_port *dp = dsa_phylink_to_port(config);
struct bcm_sf2_priv *priv;
int port = dp->index;
u32 reg, offset;
priv = bcm_sf2_to_priv(dp->ds);
if (priv->wol_ports_mask & BIT(port))
return;
offset = bcm_sf2_port_override_offset(priv, port);
reg = core_readl(priv, offset);
reg &= ~LINK_STS;
core_writel(priv, reg, offset);
bcm_sf2_sw_mac_link_set(dp->ds, port, interface, false);
}
static void bcm_sf2_sw_mac_link_up(struct phylink_config *config,
struct phy_device *phydev,
unsigned int mode,
phy_interface_t interface,
int speed, int duplex,
bool tx_pause, bool rx_pause)
{
struct dsa_port *dp = dsa_phylink_to_port(config);
struct bcm_sf2_priv *priv;
u32 reg_rgmii_ctrl = 0;
struct ethtool_keee *p;
int port = dp->index;
u32 reg, offset;
bcm_sf2_sw_mac_link_set(dp->ds, port, interface, true);
priv = bcm_sf2_to_priv(dp->ds);
offset = bcm_sf2_port_override_offset(priv, port);
if (phy_interface_mode_is_rgmii(interface) ||
interface == PHY_INTERFACE_MODE_MII ||
interface == PHY_INTERFACE_MODE_REVMII) {
reg_rgmii_ctrl = bcm_sf2_reg_rgmii_cntrl(priv, port);
reg = reg_readl(priv, reg_rgmii_ctrl);
reg &= ~(RX_PAUSE_EN | TX_PAUSE_EN);
if (tx_pause)
reg |= TX_PAUSE_EN;
if (rx_pause)
reg |= RX_PAUSE_EN;
reg_writel(priv, reg, reg_rgmii_ctrl);
}
reg = LINK_STS;
if (port == 8) {
if (priv->type == BCM4908_DEVICE_ID)
reg |= GMII_SPEED_UP_2G;
reg |= MII_SW_OR;
} else {
reg |= SW_OVERRIDE;
}
switch (speed) {
case SPEED_1000:
reg |= SPDSTS_1000 << SPEED_SHIFT;
break;
case SPEED_100:
reg |= SPDSTS_100 << SPEED_SHIFT;
break;
}
if (duplex == DUPLEX_FULL)
reg |= DUPLX_MODE;
if (tx_pause)
reg |= TXFLOW_CNTL;
if (rx_pause)
reg |= RXFLOW_CNTL;
core_writel(priv, reg, offset);
if (mode == MLO_AN_PHY && phydev) {
p = &priv->dev->ports[port].eee;
p->eee_enabled = b53_eee_init(dp->ds, port, phydev);
}
}
static void bcm_sf2_sw_fixed_state(struct dsa_switch *ds, int port,
struct phylink_link_state *status)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
status->link = false;
/* MoCA port is special as we do not get link status from CORE_LNKSTS,
* which means that we need to force the link at the port override
* level to get the data to flow. We do use what the interrupt handler
* did determine before.
*
* For the other ports, we just force the link status, since this is
* a fixed PHY device.
*/
if (port == priv->moca_port) {
status->link = priv->port_sts[port].link;
/* For MoCA interfaces, also force a link down notification
* since some version of the user-space daemon (mocad) use
* cmd->autoneg to force the link, which messes up the PHY
* state machine and make it go in PHY_FORCING state instead.
*/
if (!status->link)
netif_carrier_off(dsa_to_port(ds, port)->user);
status->duplex = DUPLEX_FULL;
} else {
status->link = true;
}
}
static void bcm_sf2_enable_acb(struct dsa_switch *ds)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
u32 reg;
/* Enable ACB globally */
reg = acb_readl(priv, ACB_CONTROL);
reg |= (ACB_FLUSH_MASK << ACB_FLUSH_SHIFT);
acb_writel(priv, reg, ACB_CONTROL);
reg &= ~(ACB_FLUSH_MASK << ACB_FLUSH_SHIFT);
reg |= ACB_EN | ACB_ALGORITHM;
acb_writel(priv, reg, ACB_CONTROL);
}
static int bcm_sf2_sw_suspend(struct dsa_switch *ds)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
unsigned int port;
bcm_sf2_intr_disable(priv);
/* Disable all ports physically present including the IMP
* port, the other ones have already been disabled during
* bcm_sf2_sw_setup
*/
for (port = 0; port < ds->num_ports; port++) {
if (dsa_is_user_port(ds, port) || dsa_is_cpu_port(ds, port))
bcm_sf2_port_disable(ds, port);
}
if (!priv->wol_ports_mask)
clk_disable_unprepare(priv->clk);
return 0;
}
static int bcm_sf2_sw_resume(struct dsa_switch *ds)
{
struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
int ret;
if (!priv->wol_ports_mask)
clk_prepare_enable(priv->clk);
ret = bcm_sf2_sw_rst(priv);
if (ret) {
pr_err("%s: failed to software reset switch\n", __func__);
return ret;
}
bcm_sf2_crossbar_setup(priv);
ret = bcm_sf2_cfp_resume(ds);
if (ret)
return ret;
if (priv->hw_params.num_gphy == 1)
bcm_sf2_gphy_enable_set(ds, true);
ds->ops->setup(ds);
return 0;
}
static void bcm_sf2_sw_get_wol(struct dsa_switch *ds, int port,