forked from Minki/linux
a4b770972b
This patch removes from drivers/net/ all the unnecessary
return; statements that precede the last closing brace of
void functions.
It does not remove the returns that are immediately
preceded by a label as gcc doesn't like that.
It also does not remove null void functions with return.
Done via:
$ grep -rP --include=*.[ch] -l "return;\n}" net/ | \
xargs perl -i -e 'local $/ ; while (<>) { s/\n[ \t\n]+return;\n}/\n}/g; print; }'
with some cleanups by hand.
Compile tested x86 allmodconfig only.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
236 lines
7.0 KiB
C
236 lines
7.0 KiB
C
/*******************************************************************************
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This is the driver for the GMAC on-chip Ethernet controller for ST SoCs.
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DWC Ether MAC 10/100/1000 Universal version 3.41a has been used for
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developing this code.
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This only implements the mac core functions for this chip.
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Copyright (C) 2007-2009 STMicroelectronics Ltd
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This program is free software; you can redistribute it and/or modify it
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under the terms and conditions of the GNU General Public License,
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version 2, as published by the Free Software Foundation.
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This program is distributed in the hope it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution in
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the file called "COPYING".
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Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
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*******************************************************************************/
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#include <linux/crc32.h>
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#include <linux/slab.h>
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#include "dwmac1000.h"
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static void dwmac1000_core_init(unsigned long ioaddr)
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{
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u32 value = readl(ioaddr + GMAC_CONTROL);
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value |= GMAC_CORE_INIT;
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writel(value, ioaddr + GMAC_CONTROL);
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/* STBus Bridge Configuration */
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/*writel(0xc5608, ioaddr + 0x00007000);*/
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/* Freeze MMC counters */
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writel(0x8, ioaddr + GMAC_MMC_CTRL);
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/* Mask GMAC interrupts */
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writel(0x207, ioaddr + GMAC_INT_MASK);
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#ifdef STMMAC_VLAN_TAG_USED
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/* Tag detection without filtering */
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writel(0x0, ioaddr + GMAC_VLAN_TAG);
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#endif
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}
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static void dwmac1000_dump_regs(unsigned long ioaddr)
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{
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int i;
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pr_info("\tDWMAC1000 regs (base addr = 0x%8x)\n", (unsigned int)ioaddr);
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for (i = 0; i < 55; i++) {
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int offset = i * 4;
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pr_info("\tReg No. %d (offset 0x%x): 0x%08x\n", i,
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offset, readl(ioaddr + offset));
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}
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}
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static void dwmac1000_set_umac_addr(unsigned long ioaddr, unsigned char *addr,
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unsigned int reg_n)
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{
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stmmac_set_mac_addr(ioaddr, addr, GMAC_ADDR_HIGH(reg_n),
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GMAC_ADDR_LOW(reg_n));
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}
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static void dwmac1000_get_umac_addr(unsigned long ioaddr, unsigned char *addr,
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unsigned int reg_n)
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{
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stmmac_get_mac_addr(ioaddr, addr, GMAC_ADDR_HIGH(reg_n),
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GMAC_ADDR_LOW(reg_n));
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}
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static void dwmac1000_set_filter(struct net_device *dev)
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{
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unsigned long ioaddr = dev->base_addr;
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unsigned int value = 0;
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CHIP_DBG(KERN_INFO "%s: # mcasts %d, # unicast %d\n",
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__func__, netdev_mc_count(dev), netdev_uc_count(dev));
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if (dev->flags & IFF_PROMISC)
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value = GMAC_FRAME_FILTER_PR;
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else if ((netdev_mc_count(dev) > HASH_TABLE_SIZE)
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|| (dev->flags & IFF_ALLMULTI)) {
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value = GMAC_FRAME_FILTER_PM; /* pass all multi */
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writel(0xffffffff, ioaddr + GMAC_HASH_HIGH);
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writel(0xffffffff, ioaddr + GMAC_HASH_LOW);
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} else if (!netdev_mc_empty(dev)) {
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u32 mc_filter[2];
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struct netdev_hw_addr *ha;
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/* Hash filter for multicast */
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value = GMAC_FRAME_FILTER_HMC;
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memset(mc_filter, 0, sizeof(mc_filter));
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netdev_for_each_mc_addr(ha, dev) {
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/* The upper 6 bits of the calculated CRC are used to
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index the contens of the hash table */
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int bit_nr =
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bitrev32(~crc32_le(~0, ha->addr, 6)) >> 26;
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/* The most significant bit determines the register to
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* use (H/L) while the other 5 bits determine the bit
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* within the register. */
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mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
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}
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writel(mc_filter[0], ioaddr + GMAC_HASH_LOW);
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writel(mc_filter[1], ioaddr + GMAC_HASH_HIGH);
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}
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/* Handle multiple unicast addresses (perfect filtering)*/
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if (netdev_uc_count(dev) > GMAC_MAX_UNICAST_ADDRESSES)
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/* Switch to promiscuous mode is more than 16 addrs
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are required */
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value |= GMAC_FRAME_FILTER_PR;
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else {
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int reg = 1;
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struct netdev_hw_addr *ha;
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netdev_for_each_uc_addr(ha, dev) {
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dwmac1000_set_umac_addr(ioaddr, ha->addr, reg);
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reg++;
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}
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}
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#ifdef FRAME_FILTER_DEBUG
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/* Enable Receive all mode (to debug filtering_fail errors) */
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value |= GMAC_FRAME_FILTER_RA;
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#endif
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writel(value, ioaddr + GMAC_FRAME_FILTER);
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CHIP_DBG(KERN_INFO "\tFrame Filter reg: 0x%08x\n\tHash regs: "
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"HI 0x%08x, LO 0x%08x\n", readl(ioaddr + GMAC_FRAME_FILTER),
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readl(ioaddr + GMAC_HASH_HIGH), readl(ioaddr + GMAC_HASH_LOW));
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}
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static void dwmac1000_flow_ctrl(unsigned long ioaddr, unsigned int duplex,
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unsigned int fc, unsigned int pause_time)
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{
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unsigned int flow = 0;
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CHIP_DBG(KERN_DEBUG "GMAC Flow-Control:\n");
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if (fc & FLOW_RX) {
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CHIP_DBG(KERN_DEBUG "\tReceive Flow-Control ON\n");
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flow |= GMAC_FLOW_CTRL_RFE;
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}
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if (fc & FLOW_TX) {
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CHIP_DBG(KERN_DEBUG "\tTransmit Flow-Control ON\n");
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flow |= GMAC_FLOW_CTRL_TFE;
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}
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if (duplex) {
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CHIP_DBG(KERN_DEBUG "\tduplex mode: PAUSE %d\n", pause_time);
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flow |= (pause_time << GMAC_FLOW_CTRL_PT_SHIFT);
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}
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writel(flow, ioaddr + GMAC_FLOW_CTRL);
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}
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static void dwmac1000_pmt(unsigned long ioaddr, unsigned long mode)
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{
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unsigned int pmt = 0;
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if (mode == WAKE_MAGIC) {
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CHIP_DBG(KERN_DEBUG "GMAC: WOL Magic frame\n");
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pmt |= power_down | magic_pkt_en;
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} else if (mode == WAKE_UCAST) {
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CHIP_DBG(KERN_DEBUG "GMAC: WOL on global unicast\n");
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pmt |= global_unicast;
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}
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writel(pmt, ioaddr + GMAC_PMT);
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}
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static void dwmac1000_irq_status(unsigned long ioaddr)
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{
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u32 intr_status = readl(ioaddr + GMAC_INT_STATUS);
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/* Not used events (e.g. MMC interrupts) are not handled. */
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if ((intr_status & mmc_tx_irq))
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CHIP_DBG(KERN_DEBUG "GMAC: MMC tx interrupt: 0x%08x\n",
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readl(ioaddr + GMAC_MMC_TX_INTR));
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if (unlikely(intr_status & mmc_rx_irq))
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CHIP_DBG(KERN_DEBUG "GMAC: MMC rx interrupt: 0x%08x\n",
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readl(ioaddr + GMAC_MMC_RX_INTR));
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if (unlikely(intr_status & mmc_rx_csum_offload_irq))
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CHIP_DBG(KERN_DEBUG "GMAC: MMC rx csum offload: 0x%08x\n",
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readl(ioaddr + GMAC_MMC_RX_CSUM_OFFLOAD));
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if (unlikely(intr_status & pmt_irq)) {
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CHIP_DBG(KERN_DEBUG "GMAC: received Magic frame\n");
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/* clear the PMT bits 5 and 6 by reading the PMT
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* status register. */
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readl(ioaddr + GMAC_PMT);
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}
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}
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struct stmmac_ops dwmac1000_ops = {
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.core_init = dwmac1000_core_init,
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.dump_regs = dwmac1000_dump_regs,
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.host_irq_status = dwmac1000_irq_status,
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.set_filter = dwmac1000_set_filter,
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.flow_ctrl = dwmac1000_flow_ctrl,
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.pmt = dwmac1000_pmt,
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.set_umac_addr = dwmac1000_set_umac_addr,
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.get_umac_addr = dwmac1000_get_umac_addr,
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};
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struct mac_device_info *dwmac1000_setup(unsigned long ioaddr)
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{
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struct mac_device_info *mac;
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u32 uid = readl(ioaddr + GMAC_VERSION);
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pr_info("\tDWMAC1000 - user ID: 0x%x, Synopsys ID: 0x%x\n",
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((uid & 0x0000ff00) >> 8), (uid & 0x000000ff));
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mac = kzalloc(sizeof(const struct mac_device_info), GFP_KERNEL);
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mac->mac = &dwmac1000_ops;
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mac->dma = &dwmac1000_dma_ops;
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mac->pmt = PMT_SUPPORTED;
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mac->link.port = GMAC_CONTROL_PS;
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mac->link.duplex = GMAC_CONTROL_DM;
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mac->link.speed = GMAC_CONTROL_FES;
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mac->mii.addr = GMAC_MII_ADDR;
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mac->mii.data = GMAC_MII_DATA;
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return mac;
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}
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