| /******************************************************************************* |
| 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, int *synopsys_id) |
| { |
| 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; |
| /* Synopsys Id is not available on old chips */ |
| *synopsys_id = 0; |
| |
| return mac; |
| } |
