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// SPDX-License-Identifier: GPL-2.0-only
/*******************************************************************************
This is the driver for the MAC 10/100 on-chip Ethernet controller
currently tested on all the ST boards based on STb7109 and stx7200 SoCs.
DWC Ether MAC 10/100 Universal version 4.0 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 <net/dsa.h>
#include <asm/io.h>
#include "stmmac.h"
#include "dwmac100.h"
static void dwmac100_core_init(struct mac_device_info *hw,
struct net_device *dev)
{
void __iomem *ioaddr = hw->pcsr;
u32 value = readl(ioaddr + MAC_CONTROL);
value |= MAC_CORE_INIT;
/* Clear ASTP 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 &= ~MAC_CONTROL_ASTP;
writel(value, ioaddr + MAC_CONTROL);
#ifdef STMMAC_VLAN_TAG_USED
writel(ETH_P_8021Q, ioaddr + MAC_VLAN1);
#endif
}
static void dwmac100_dump_mac_regs(struct mac_device_info *hw, u32 *reg_space)
{
void __iomem *ioaddr = hw->pcsr;
reg_space[MAC_CONTROL / 4] = readl(ioaddr + MAC_CONTROL);
reg_space[MAC_ADDR_HIGH / 4] = readl(ioaddr + MAC_ADDR_HIGH);
reg_space[MAC_ADDR_LOW / 4] = readl(ioaddr + MAC_ADDR_LOW);
reg_space[MAC_HASH_HIGH / 4] = readl(ioaddr + MAC_HASH_HIGH);
reg_space[MAC_HASH_LOW / 4] = readl(ioaddr + MAC_HASH_LOW);
reg_space[MAC_FLOW_CTRL / 4] = readl(ioaddr + MAC_FLOW_CTRL);
reg_space[MAC_VLAN1 / 4] = readl(ioaddr + MAC_VLAN1);
reg_space[MAC_VLAN2 / 4] = readl(ioaddr + MAC_VLAN2);
}
static int dwmac100_rx_ipc_enable(struct mac_device_info *hw)
{
return 0;
}
static int dwmac100_irq_status(struct mac_device_info *hw,
struct stmmac_extra_stats *x)
{
return 0;
}
static void dwmac100_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, MAC_ADDR_HIGH, MAC_ADDR_LOW);
}
static void dwmac100_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, MAC_ADDR_HIGH, MAC_ADDR_LOW);
}
static void dwmac100_set_filter(struct mac_device_info *hw,
struct net_device *dev)
{
void __iomem *ioaddr = (void __iomem *)dev->base_addr;
u32 value = readl(ioaddr + MAC_CONTROL);
if (dev->flags & IFF_PROMISC) {
value |= MAC_CONTROL_PR;
value &= ~(MAC_CONTROL_PM | MAC_CONTROL_IF | MAC_CONTROL_HO |
MAC_CONTROL_HP);
} else if ((netdev_mc_count(dev) > HASH_TABLE_SIZE)
|| (dev->flags & IFF_ALLMULTI)) {
value |= MAC_CONTROL_PM;
value &= ~(MAC_CONTROL_PR | MAC_CONTROL_IF | MAC_CONTROL_HO);
writel(0xffffffff, ioaddr + MAC_HASH_HIGH);
writel(0xffffffff, ioaddr + MAC_HASH_LOW);
} else if (netdev_mc_empty(dev)) { /* no multicast */
value &= ~(MAC_CONTROL_PM | MAC_CONTROL_PR | MAC_CONTROL_IF |
MAC_CONTROL_HO | MAC_CONTROL_HP);
} else {
u32 mc_filter[2];
struct netdev_hw_addr *ha;
/* Perfect filter mode for physical address and Hash
* filter for multicast
*/
value |= MAC_CONTROL_HP;
value &= ~(MAC_CONTROL_PM | MAC_CONTROL_PR |
MAC_CONTROL_IF | MAC_CONTROL_HO);
memset(mc_filter, 0, sizeof(mc_filter));
netdev_for_each_mc_addr(ha, dev) {
/* The upper 6 bits of the calculated CRC are used to
* index the contens of the hash table
*/
int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
/* 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);
}
writel(mc_filter[0], ioaddr + MAC_HASH_LOW);
writel(mc_filter[1], ioaddr + MAC_HASH_HIGH);
}
writel(value, ioaddr + MAC_CONTROL);
}
static void dwmac100_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;
unsigned int flow = MAC_FLOW_CTRL_ENABLE;
if (duplex)
flow |= (pause_time << MAC_FLOW_CTRL_PT_SHIFT);
writel(flow, ioaddr + MAC_FLOW_CTRL);
}
/* No PMT module supported on ST boards with this Eth chip. */
static void dwmac100_pmt(struct mac_device_info *hw, unsigned long mode)
{
return;
}
static void dwmac100_set_mac_loopback(void __iomem *ioaddr, bool enable)
{
u32 value = readl(ioaddr + MAC_CONTROL);
if (enable)
value |= MAC_CONTROL_OM;
else
value &= ~MAC_CONTROL_OM;
writel(value, ioaddr + MAC_CONTROL);
}
const struct stmmac_ops dwmac100_ops = {
.core_init = dwmac100_core_init,
.set_mac = stmmac_set_mac,
.rx_ipc = dwmac100_rx_ipc_enable,
.dump_regs = dwmac100_dump_mac_regs,
.host_irq_status = dwmac100_irq_status,
.set_filter = dwmac100_set_filter,
.flow_ctrl = dwmac100_flow_ctrl,
.pmt = dwmac100_pmt,
.set_umac_addr = dwmac100_set_umac_addr,
.get_umac_addr = dwmac100_get_umac_addr,
.set_mac_loopback = dwmac100_set_mac_loopback,
};
int dwmac100_setup(struct stmmac_priv *priv)
{
struct mac_device_info *mac = priv->hw;
dev_info(priv->device, "\tDWMAC100\n");
mac->pcsr = priv->ioaddr;
mac->link.duplex = MAC_CONTROL_F;
mac->link.speed10 = 0;
mac->link.speed100 = 0;
mac->link.speed1000 = 0;
mac->link.speed_mask = MAC_CONTROL_PS;
mac->mii.addr = MAC_MII_ADDR;
mac->mii.data = MAC_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;
}
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