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- /*******************************************************************************
- 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
- This program is free software; you can redistribute it and/or modify it
- under the terms and conditions of the GNU General Public License,
- version 2, as published by the Free Software Foundation.
- This program is distributed in the hope 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.
- You should have received a copy of the GNU General Public License along with
- this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- The full GNU General Public License is included in this distribution in
- the file called "COPYING".
- Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
- *******************************************************************************/
- #include <linux/crc32.h>
- #include <asm/io.h>
- #include "dwmac100.h"
- static void dwmac100_core_init(struct mac_device_info *hw, int mtu)
- {
- void __iomem *ioaddr = hw->pcsr;
- u32 value = readl(ioaddr + MAC_CONTROL);
- writel((value | MAC_CORE_INIT), 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)
- {
- void __iomem *ioaddr = hw->pcsr;
- pr_info("\t----------------------------------------------\n"
- "\t DWMAC 100 CSR (base addr = 0x%p)\n"
- "\t----------------------------------------------\n", ioaddr);
- pr_info("\tcontrol reg (offset 0x%x): 0x%08x\n", MAC_CONTROL,
- readl(ioaddr + MAC_CONTROL));
- pr_info("\taddr HI (offset 0x%x): 0x%08x\n ", MAC_ADDR_HIGH,
- readl(ioaddr + MAC_ADDR_HIGH));
- pr_info("\taddr LO (offset 0x%x): 0x%08x\n", MAC_ADDR_LOW,
- readl(ioaddr + MAC_ADDR_LOW));
- pr_info("\tmulticast hash HI (offset 0x%x): 0x%08x\n",
- MAC_HASH_HIGH, readl(ioaddr + MAC_HASH_HIGH));
- pr_info("\tmulticast hash LO (offset 0x%x): 0x%08x\n",
- MAC_HASH_LOW, readl(ioaddr + MAC_HASH_LOW));
- pr_info("\tflow control (offset 0x%x): 0x%08x\n",
- MAC_FLOW_CTRL, readl(ioaddr + MAC_FLOW_CTRL));
- pr_info("\tVLAN1 tag (offset 0x%x): 0x%08x\n", MAC_VLAN1,
- readl(ioaddr + MAC_VLAN1));
- pr_info("\tVLAN2 tag (offset 0x%x): 0x%08x\n", MAC_VLAN2,
- 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)
- {
- 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 const struct stmmac_ops dwmac100_ops = {
- .core_init = dwmac100_core_init,
- .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,
- };
- struct mac_device_info *dwmac100_setup(void __iomem *ioaddr)
- {
- struct mac_device_info *mac;
- mac = kzalloc(sizeof(const struct mac_device_info), GFP_KERNEL);
- if (!mac)
- return NULL;
- pr_info("\tDWMAC100\n");
- mac->pcsr = ioaddr;
- mac->mac = &dwmac100_ops;
- mac->dma = &dwmac100_dma_ops;
- mac->link.port = MAC_CONTROL_PS;
- mac->link.duplex = MAC_CONTROL_F;
- mac->link.speed = 0;
- mac->mii.addr = MAC_MII_ADDR;
- mac->mii.data = MAC_MII_DATA;
- mac->synopsys_uid = 0;
- return mac;
- }
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