blob: 3d69da112625ec672bc57bc2237ce780ced46b7e [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
/*******************************************************************************
This is the driver for the GMAC on-chip Ethernet controller for ST SoCs.
DWC Ether MAC 10/100/1000 Universal version 3.41a has been used for
developing this code.
This only implements the mac core functions for this chip.
Copyright (C) 2007-2009 STMicroelectronics Ltd
Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*******************************************************************************/
#include <linux/crc32.h>
#include <linux/slab.h>
#include <linux/ethtool.h>
#include <net/dsa.h>
#include <asm/io.h>
#include "stmmac.h"
#include "stmmac_pcs.h"
#include "dwmac1000.h"
static void dwmac1000_core_init(struct mac_device_info *hw,
struct net_device *dev)
{
void __iomem *ioaddr = hw->pcsr;
u32 value = readl(ioaddr + GMAC_CONTROL);
int mtu = dev->mtu;
/* Configure GMAC core */
value |= GMAC_CORE_INIT;
/* Clear ACS bit because Ethernet switch tagging formats such as
* Broadcom tags can look like invalid LLC/SNAP packets and cause the
* hardware to truncate packets on reception.
*/
if (netdev_uses_dsa(dev))
value &= ~GMAC_CONTROL_ACS;
if (mtu > 1500)
value |= GMAC_CONTROL_2K;
if (mtu > 2000)
value |= GMAC_CONTROL_JE;
if (hw->ps) {
value |= GMAC_CONTROL_TE;
value &= ~hw->link.speed_mask;
switch (hw->ps) {
case SPEED_1000:
value |= hw->link.speed1000;
break;
case SPEED_100:
value |= hw->link.speed100;
break;
case SPEED_10:
value |= hw->link.speed10;
break;
}
}
writel(value, ioaddr + GMAC_CONTROL);
/* Mask GMAC interrupts */
value = GMAC_INT_DEFAULT_MASK;
if (hw->pcs)
value &= ~GMAC_INT_DISABLE_PCS;
writel(value, ioaddr + GMAC_INT_MASK);
#ifdef STMMAC_VLAN_TAG_USED
/* Tag detection without filtering */
writel(0x0, ioaddr + GMAC_VLAN_TAG);
#endif
}
static int dwmac1000_rx_ipc_enable(struct mac_device_info *hw)
{
void __iomem *ioaddr = hw->pcsr;
u32 value = readl(ioaddr + GMAC_CONTROL);
if (hw->rx_csum)
value |= GMAC_CONTROL_IPC;
else
value &= ~GMAC_CONTROL_IPC;
writel(value, ioaddr + GMAC_CONTROL);
value = readl(ioaddr + GMAC_CONTROL);
return !!(value & GMAC_CONTROL_IPC);
}
static void dwmac1000_dump_regs(struct mac_device_info *hw, u32 *reg_space)
{
void __iomem *ioaddr = hw->pcsr;
int i;
for (i = 0; i < 55; i++)
reg_space[i] = readl(ioaddr + i * 4);
}
static void dwmac1000_set_umac_addr(struct mac_device_info *hw,
unsigned char *addr,
unsigned int reg_n)
{
void __iomem *ioaddr = hw->pcsr;
stmmac_set_mac_addr(ioaddr, addr, GMAC_ADDR_HIGH(reg_n),
GMAC_ADDR_LOW(reg_n));
}
static void dwmac1000_get_umac_addr(struct mac_device_info *hw,
unsigned char *addr,
unsigned int reg_n)
{
void __iomem *ioaddr = hw->pcsr;
stmmac_get_mac_addr(ioaddr, addr, GMAC_ADDR_HIGH(reg_n),
GMAC_ADDR_LOW(reg_n));
}
static void dwmac1000_set_mchash(void __iomem *ioaddr, u32 *mcfilterbits,
int mcbitslog2)
{
int numhashregs, regs;
switch (mcbitslog2) {
case 6:
writel(mcfilterbits[0], ioaddr + GMAC_HASH_LOW);
writel(mcfilterbits[1], ioaddr + GMAC_HASH_HIGH);
return;
break;
case 7:
numhashregs = 4;
break;
case 8:
numhashregs = 8;
break;
default:
pr_debug("STMMAC: err in setting multicast filter\n");
return;
break;
}
for (regs = 0; regs < numhashregs; regs++)
writel(mcfilterbits[regs],
ioaddr + GMAC_EXTHASH_BASE + regs * 4);
}
static void dwmac1000_set_filter(struct mac_device_info *hw,
struct net_device *dev)
{
void __iomem *ioaddr = (void __iomem *)dev->base_addr;
unsigned int value = 0;
unsigned int perfect_addr_number = hw->unicast_filter_entries;
u32 mc_filter[8];
int mcbitslog2 = hw->mcast_bits_log2;
pr_debug("%s: # mcasts %d, # unicast %d\n", __func__,
netdev_mc_count(dev), netdev_uc_count(dev));
memset(mc_filter, 0, sizeof(mc_filter));
if (dev->flags & IFF_PROMISC) {
value = GMAC_FRAME_FILTER_PR | GMAC_FRAME_FILTER_PCF;
} else if (dev->flags & IFF_ALLMULTI) {
value = GMAC_FRAME_FILTER_PM; /* pass all multi */
} else if (!netdev_mc_empty(dev)) {
struct netdev_hw_addr *ha;
/* Hash filter for multicast */
value = GMAC_FRAME_FILTER_HMC;
netdev_for_each_mc_addr(ha, dev) {
/* The upper n bits of the calculated CRC are used to
* index the contents of the hash table. The number of
* bits used depends on the hardware configuration
* selected at core configuration time.
*/
int bit_nr = bitrev32(~crc32_le(~0, ha->addr,
ETH_ALEN)) >>
(32 - mcbitslog2);
/* The most significant bit determines the register to
* use (H/L) while the other 5 bits determine the bit
* within the register.
*/
mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
}
}
value |= GMAC_FRAME_FILTER_HPF;
dwmac1000_set_mchash(ioaddr, mc_filter, mcbitslog2);
/* Handle multiple unicast addresses (perfect filtering) */
if (netdev_uc_count(dev) > perfect_addr_number)
/* Switch to promiscuous mode if more than unicast
* addresses are requested than supported by hardware.
*/
value |= GMAC_FRAME_FILTER_PR;
else {
int reg = 1;
struct netdev_hw_addr *ha;
netdev_for_each_uc_addr(ha, dev) {
stmmac_set_mac_addr(ioaddr, ha->addr,
GMAC_ADDR_HIGH(reg),
GMAC_ADDR_LOW(reg));
reg++;
}
while (reg <= perfect_addr_number) {
writel(0, ioaddr + GMAC_ADDR_HIGH(reg));
writel(0, ioaddr + GMAC_ADDR_LOW(reg));
reg++;
}
}
#ifdef FRAME_FILTER_DEBUG
/* Enable Receive all mode (to debug filtering_fail errors) */
value |= GMAC_FRAME_FILTER_RA;
#endif
writel(value, ioaddr + GMAC_FRAME_FILTER);
}
static void dwmac1000_flow_ctrl(struct mac_device_info *hw, unsigned int duplex,
unsigned int fc, unsigned int pause_time,
u32 tx_cnt)
{
void __iomem *ioaddr = hw->pcsr;
/* Set flow such that DZPQ in Mac Register 6 is 0,
* and unicast pause detect is enabled.
*/
unsigned int flow = GMAC_FLOW_CTRL_UP;
pr_debug("GMAC Flow-Control:\n");
if (fc & FLOW_RX) {
pr_debug("\tReceive Flow-Control ON\n");
flow |= GMAC_FLOW_CTRL_RFE;
}
if (fc & FLOW_TX) {
pr_debug("\tTransmit Flow-Control ON\n");
flow |= GMAC_FLOW_CTRL_TFE;
}
if (duplex) {
pr_debug("\tduplex mode: PAUSE %d\n", pause_time);
flow |= (pause_time << GMAC_FLOW_CTRL_PT_SHIFT);
}
writel(flow, ioaddr + GMAC_FLOW_CTRL);
}
static void dwmac1000_pmt(struct mac_device_info *hw, unsigned long mode)
{
void __iomem *ioaddr = hw->pcsr;
unsigned int pmt = 0;
if (mode & WAKE_MAGIC) {
pr_debug("GMAC: WOL Magic frame\n");
pmt |= power_down | magic_pkt_en;
}
if (mode & WAKE_UCAST) {
pr_debug("GMAC: WOL on global unicast\n");
pmt |= power_down | global_unicast | wake_up_frame_en;
}
writel(pmt, ioaddr + GMAC_PMT);
}
/* RGMII or SMII interface */
static void dwmac1000_rgsmii(void __iomem *ioaddr, struct stmmac_extra_stats *x)
{
u32 status;
status = readl(ioaddr + GMAC_RGSMIIIS);
x->irq_rgmii_n++;
/* Check the link status */
if (status & GMAC_RGSMIIIS_LNKSTS) {
int speed_value;
x->pcs_link = 1;
speed_value = ((status & GMAC_RGSMIIIS_SPEED) >>
GMAC_RGSMIIIS_SPEED_SHIFT);
if (speed_value == GMAC_RGSMIIIS_SPEED_125)
x->pcs_speed = SPEED_1000;
else if (speed_value == GMAC_RGSMIIIS_SPEED_25)
x->pcs_speed = SPEED_100;
else
x->pcs_speed = SPEED_10;
x->pcs_duplex = (status & GMAC_RGSMIIIS_LNKMOD_MASK);
pr_info("Link is Up - %d/%s\n", (int)x->pcs_speed,
x->pcs_duplex ? "Full" : "Half");
} else {
x->pcs_link = 0;
pr_info("Link is Down\n");
}
}
static int dwmac1000_irq_status(struct mac_device_info *hw,
struct stmmac_extra_stats *x)
{
void __iomem *ioaddr = hw->pcsr;
u32 intr_status = readl(ioaddr + GMAC_INT_STATUS);
u32 intr_mask = readl(ioaddr + GMAC_INT_MASK);
int ret = 0;
/* Discard masked bits */
intr_status &= ~intr_mask;
/* Not used events (e.g. MMC interrupts) are not handled. */
if ((intr_status & GMAC_INT_STATUS_MMCTIS))
x->mmc_tx_irq_n++;
if (unlikely(intr_status & GMAC_INT_STATUS_MMCRIS))
x->mmc_rx_irq_n++;
if (unlikely(intr_status & GMAC_INT_STATUS_MMCCSUM))
x->mmc_rx_csum_offload_irq_n++;
if (unlikely(intr_status & GMAC_INT_DISABLE_PMT)) {
/* clear the PMT bits 5 and 6 by reading the PMT status reg */
readl(ioaddr + GMAC_PMT);
x->irq_receive_pmt_irq_n++;
}
/* MAC tx/rx EEE LPI entry/exit interrupts */
if (intr_status & GMAC_INT_STATUS_LPIIS) {
/* Clean LPI interrupt by reading the Reg 12 */
ret = readl(ioaddr + LPI_CTRL_STATUS);
if (ret & LPI_CTRL_STATUS_TLPIEN)
x->irq_tx_path_in_lpi_mode_n++;
if (ret & LPI_CTRL_STATUS_TLPIEX)
x->irq_tx_path_exit_lpi_mode_n++;
if (ret & LPI_CTRL_STATUS_RLPIEN)
x->irq_rx_path_in_lpi_mode_n++;
if (ret & LPI_CTRL_STATUS_RLPIEX)
x->irq_rx_path_exit_lpi_mode_n++;
}
dwmac_pcs_isr(ioaddr, GMAC_PCS_BASE, intr_status, x);
if (intr_status & PCS_RGSMIIIS_IRQ)
dwmac1000_rgsmii(ioaddr, x);
return ret;
}
static void dwmac1000_set_eee_mode(struct mac_device_info *hw,
bool en_tx_lpi_clockgating)
{
void __iomem *ioaddr = hw->pcsr;
u32 value;
/*TODO - en_tx_lpi_clockgating treatment */
/* Enable the link status receive on RGMII, SGMII ore SMII
* receive path and instruct the transmit to enter in LPI
* state.
*/
value = readl(ioaddr + LPI_CTRL_STATUS);
value |= LPI_CTRL_STATUS_LPIEN | LPI_CTRL_STATUS_LPITXA;
writel(value, ioaddr + LPI_CTRL_STATUS);
}
static void dwmac1000_reset_eee_mode(struct mac_device_info *hw)
{
void __iomem *ioaddr = hw->pcsr;
u32 value;
value = readl(ioaddr + LPI_CTRL_STATUS);
value &= ~(LPI_CTRL_STATUS_LPIEN | LPI_CTRL_STATUS_LPITXA);
writel(value, ioaddr + LPI_CTRL_STATUS);
}
static void dwmac1000_set_eee_pls(struct mac_device_info *hw, int link)
{
void __iomem *ioaddr = hw->pcsr;
u32 value;
value = readl(ioaddr + LPI_CTRL_STATUS);
if (link)
value |= LPI_CTRL_STATUS_PLS;
else
value &= ~LPI_CTRL_STATUS_PLS;
writel(value, ioaddr + LPI_CTRL_STATUS);
}
static void dwmac1000_set_eee_timer(struct mac_device_info *hw, int ls, int tw)
{
void __iomem *ioaddr = hw->pcsr;
int value = ((tw & 0xffff)) | ((ls & 0x7ff) << 16);
/* Program the timers in the LPI timer control register:
* LS: minimum time (ms) for which the link
* status from PHY should be ok before transmitting
* the LPI pattern.
* TW: minimum time (us) for which the core waits
* after it has stopped transmitting the LPI pattern.
*/
writel(value, ioaddr + LPI_TIMER_CTRL);
}
static void dwmac1000_ctrl_ane(void __iomem *ioaddr, bool ane, bool srgmi_ral,
bool loopback)
{
dwmac_ctrl_ane(ioaddr, GMAC_PCS_BASE, ane, srgmi_ral, loopback);
}
static void dwmac1000_rane(void __iomem *ioaddr, bool restart)
{
dwmac_rane(ioaddr, GMAC_PCS_BASE, restart);
}
static void dwmac1000_get_adv_lp(void __iomem *ioaddr, struct rgmii_adv *adv)
{
dwmac_get_adv_lp(ioaddr, GMAC_PCS_BASE, adv);
}
static void dwmac1000_debug(void __iomem *ioaddr, struct stmmac_extra_stats *x,
u32 rx_queues, u32 tx_queues)
{
u32 value = readl(ioaddr + GMAC_DEBUG);
if (value & GMAC_DEBUG_TXSTSFSTS)
x->mtl_tx_status_fifo_full++;
if (value & GMAC_DEBUG_TXFSTS)
x->mtl_tx_fifo_not_empty++;
if (value & GMAC_DEBUG_TWCSTS)
x->mmtl_fifo_ctrl++;
if (value & GMAC_DEBUG_TRCSTS_MASK) {
u32 trcsts = (value & GMAC_DEBUG_TRCSTS_MASK)
>> GMAC_DEBUG_TRCSTS_SHIFT;
if (trcsts == GMAC_DEBUG_TRCSTS_WRITE)
x->mtl_tx_fifo_read_ctrl_write++;
else if (trcsts == GMAC_DEBUG_TRCSTS_TXW)
x->mtl_tx_fifo_read_ctrl_wait++;
else if (trcsts == GMAC_DEBUG_TRCSTS_READ)
x->mtl_tx_fifo_read_ctrl_read++;
else
x->mtl_tx_fifo_read_ctrl_idle++;
}
if (value & GMAC_DEBUG_TXPAUSED)
x->mac_tx_in_pause++;
if (value & GMAC_DEBUG_TFCSTS_MASK) {
u32 tfcsts = (value & GMAC_DEBUG_TFCSTS_MASK)
>> GMAC_DEBUG_TFCSTS_SHIFT;
if (tfcsts == GMAC_DEBUG_TFCSTS_XFER)
x->mac_tx_frame_ctrl_xfer++;
else if (tfcsts == GMAC_DEBUG_TFCSTS_GEN_PAUSE)
x->mac_tx_frame_ctrl_pause++;
else if (tfcsts == GMAC_DEBUG_TFCSTS_WAIT)
x->mac_tx_frame_ctrl_wait++;
else
x->mac_tx_frame_ctrl_idle++;
}
if (value & GMAC_DEBUG_TPESTS)
x->mac_gmii_tx_proto_engine++;
if (value & GMAC_DEBUG_RXFSTS_MASK) {
u32 rxfsts = (value & GMAC_DEBUG_RXFSTS_MASK)
>> GMAC_DEBUG_RRCSTS_SHIFT;
if (rxfsts == GMAC_DEBUG_RXFSTS_FULL)
x->mtl_rx_fifo_fill_level_full++;
else if (rxfsts == GMAC_DEBUG_RXFSTS_AT)
x->mtl_rx_fifo_fill_above_thresh++;
else if (rxfsts == GMAC_DEBUG_RXFSTS_BT)
x->mtl_rx_fifo_fill_below_thresh++;
else
x->mtl_rx_fifo_fill_level_empty++;
}
if (value & GMAC_DEBUG_RRCSTS_MASK) {
u32 rrcsts = (value & GMAC_DEBUG_RRCSTS_MASK) >>
GMAC_DEBUG_RRCSTS_SHIFT;
if (rrcsts == GMAC_DEBUG_RRCSTS_FLUSH)
x->mtl_rx_fifo_read_ctrl_flush++;
else if (rrcsts == GMAC_DEBUG_RRCSTS_RSTAT)
x->mtl_rx_fifo_read_ctrl_read_data++;
else if (rrcsts == GMAC_DEBUG_RRCSTS_RDATA)
x->mtl_rx_fifo_read_ctrl_status++;
else
x->mtl_rx_fifo_read_ctrl_idle++;
}
if (value & GMAC_DEBUG_RWCSTS)
x->mtl_rx_fifo_ctrl_active++;
if (value & GMAC_DEBUG_RFCFCSTS_MASK)
x->mac_rx_frame_ctrl_fifo = (value & GMAC_DEBUG_RFCFCSTS_MASK)
>> GMAC_DEBUG_RFCFCSTS_SHIFT;
if (value & GMAC_DEBUG_RPESTS)
x->mac_gmii_rx_proto_engine++;
}
static void dwmac1000_set_mac_loopback(void __iomem *ioaddr, bool enable)
{
u32 value = readl(ioaddr + GMAC_CONTROL);
if (enable)
value |= GMAC_CONTROL_LM;
else
value &= ~GMAC_CONTROL_LM;
writel(value, ioaddr + GMAC_CONTROL);
}
const struct stmmac_ops dwmac1000_ops = {
.core_init = dwmac1000_core_init,
.set_mac = stmmac_set_mac,
.rx_ipc = dwmac1000_rx_ipc_enable,
.dump_regs = dwmac1000_dump_regs,
.host_irq_status = dwmac1000_irq_status,
.set_filter = dwmac1000_set_filter,
.flow_ctrl = dwmac1000_flow_ctrl,
.pmt = dwmac1000_pmt,
.set_umac_addr = dwmac1000_set_umac_addr,
.get_umac_addr = dwmac1000_get_umac_addr,
.set_eee_mode = dwmac1000_set_eee_mode,
.reset_eee_mode = dwmac1000_reset_eee_mode,
.set_eee_timer = dwmac1000_set_eee_timer,
.set_eee_pls = dwmac1000_set_eee_pls,
.debug = dwmac1000_debug,
.pcs_ctrl_ane = dwmac1000_ctrl_ane,
.pcs_rane = dwmac1000_rane,
.pcs_get_adv_lp = dwmac1000_get_adv_lp,
.set_mac_loopback = dwmac1000_set_mac_loopback,
};
int dwmac1000_setup(struct stmmac_priv *priv)
{
struct mac_device_info *mac = priv->hw;
dev_info(priv->device, "\tDWMAC1000\n");
priv->dev->priv_flags |= IFF_UNICAST_FLT;
mac->pcsr = priv->ioaddr;
mac->multicast_filter_bins = priv->plat->multicast_filter_bins;
mac->unicast_filter_entries = priv->plat->unicast_filter_entries;
mac->mcast_bits_log2 = 0;
if (mac->multicast_filter_bins)
mac->mcast_bits_log2 = ilog2(mac->multicast_filter_bins);
mac->link.duplex = GMAC_CONTROL_DM;
mac->link.speed10 = GMAC_CONTROL_PS;
mac->link.speed100 = GMAC_CONTROL_PS | GMAC_CONTROL_FES;
mac->link.speed1000 = 0;
mac->link.speed_mask = GMAC_CONTROL_PS | GMAC_CONTROL_FES;
mac->mii.addr = GMAC_MII_ADDR;
mac->mii.data = GMAC_MII_DATA;
mac->mii.addr_shift = 11;
mac->mii.addr_mask = 0x0000F800;
mac->mii.reg_shift = 6;
mac->mii.reg_mask = 0x000007C0;
mac->mii.clk_csr_shift = 2;
mac->mii.clk_csr_mask = GENMASK(5, 2);
return 0;
}