![Anton Vorontsov](/assets/img/avatar_default.png)
The drivers were touching net queue before it has been started, so without this patch, the drivers will potentially WARN at net/core/dev.c:1328. I don't have the hardware for the drivers below, so this patch is untested, and thus should be carefully peer reviewed. tc35815.c au1000_eth.c bfin_mac.c macb.c ^ The four drivers are using phylib, they're calling netif_start_queue() in open() callback. So trivially remove netif_tx_schedule_all(). Phylib will handle netif_carrier_*(). cpmac.c fec_mpc52xx.c fs_enet/fs_enet-main.c sh_eth.c ^ The same as above, but these were also needlessly calling netif_carrier_*() functions. So removed queue calls and also remove carrier calls, since phylib will handle it. fs_enet-main.c also didn't call netif_start_queue() at open(), this is fixed now. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1170 lines
29 KiB
C
1170 lines
29 KiB
C
/*
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* SuperH Ethernet device driver
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*
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* Copyright (C) 2006,2007 Nobuhiro Iwamatsu
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* Copyright (C) 2008 Renesas Solutions Corp.
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*
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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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*
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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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*
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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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*/
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#include <linux/version.h>
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#include <linux/init.h>
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#include <linux/dma-mapping.h>
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#include <linux/etherdevice.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/mdio-bitbang.h>
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#include <linux/netdevice.h>
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#include <linux/phy.h>
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#include <linux/cache.h>
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#include <linux/io.h>
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#include "sh_eth.h"
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/*
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* Program the hardware MAC address from dev->dev_addr.
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*/
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static void update_mac_address(struct net_device *ndev)
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{
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u32 ioaddr = ndev->base_addr;
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ctrl_outl((ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) |
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(ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]),
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ioaddr + MAHR);
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ctrl_outl((ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]),
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ioaddr + MALR);
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}
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/*
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* Get MAC address from SuperH MAC address register
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*
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* SuperH's Ethernet device doesn't have 'ROM' to MAC address.
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* This driver get MAC address that use by bootloader(U-boot or sh-ipl+g).
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* When you want use this device, you must set MAC address in bootloader.
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*
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*/
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static void read_mac_address(struct net_device *ndev)
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{
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u32 ioaddr = ndev->base_addr;
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ndev->dev_addr[0] = (ctrl_inl(ioaddr + MAHR) >> 24);
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ndev->dev_addr[1] = (ctrl_inl(ioaddr + MAHR) >> 16) & 0xFF;
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ndev->dev_addr[2] = (ctrl_inl(ioaddr + MAHR) >> 8) & 0xFF;
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ndev->dev_addr[3] = (ctrl_inl(ioaddr + MAHR) & 0xFF);
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ndev->dev_addr[4] = (ctrl_inl(ioaddr + MALR) >> 8) & 0xFF;
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ndev->dev_addr[5] = (ctrl_inl(ioaddr + MALR) & 0xFF);
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}
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struct bb_info {
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struct mdiobb_ctrl ctrl;
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u32 addr;
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u32 mmd_msk;/* MMD */
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u32 mdo_msk;
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u32 mdi_msk;
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u32 mdc_msk;
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};
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/* PHY bit set */
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static void bb_set(u32 addr, u32 msk)
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{
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ctrl_outl(ctrl_inl(addr) | msk, addr);
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}
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/* PHY bit clear */
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static void bb_clr(u32 addr, u32 msk)
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{
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ctrl_outl((ctrl_inl(addr) & ~msk), addr);
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}
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/* PHY bit read */
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static int bb_read(u32 addr, u32 msk)
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{
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return (ctrl_inl(addr) & msk) != 0;
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}
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/* Data I/O pin control */
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static void sh_mmd_ctrl(struct mdiobb_ctrl *ctrl, int bit)
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{
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struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
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if (bit)
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bb_set(bitbang->addr, bitbang->mmd_msk);
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else
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bb_clr(bitbang->addr, bitbang->mmd_msk);
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}
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/* Set bit data*/
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static void sh_set_mdio(struct mdiobb_ctrl *ctrl, int bit)
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{
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struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
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if (bit)
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bb_set(bitbang->addr, bitbang->mdo_msk);
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else
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bb_clr(bitbang->addr, bitbang->mdo_msk);
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}
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/* Get bit data*/
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static int sh_get_mdio(struct mdiobb_ctrl *ctrl)
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{
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struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
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return bb_read(bitbang->addr, bitbang->mdi_msk);
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}
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/* MDC pin control */
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static void sh_mdc_ctrl(struct mdiobb_ctrl *ctrl, int bit)
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{
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struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
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if (bit)
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bb_set(bitbang->addr, bitbang->mdc_msk);
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else
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bb_clr(bitbang->addr, bitbang->mdc_msk);
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}
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/* mdio bus control struct */
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static struct mdiobb_ops bb_ops = {
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.owner = THIS_MODULE,
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.set_mdc = sh_mdc_ctrl,
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.set_mdio_dir = sh_mmd_ctrl,
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.set_mdio_data = sh_set_mdio,
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.get_mdio_data = sh_get_mdio,
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};
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static void sh_eth_reset(struct net_device *ndev)
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{
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u32 ioaddr = ndev->base_addr;
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ctrl_outl(ctrl_inl(ioaddr + EDMR) | EDMR_SRST, ioaddr + EDMR);
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mdelay(3);
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ctrl_outl(ctrl_inl(ioaddr + EDMR) & ~EDMR_SRST, ioaddr + EDMR);
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}
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/* free skb and descriptor buffer */
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static void sh_eth_ring_free(struct net_device *ndev)
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{
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struct sh_eth_private *mdp = netdev_priv(ndev);
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int i;
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/* Free Rx skb ringbuffer */
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if (mdp->rx_skbuff) {
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for (i = 0; i < RX_RING_SIZE; i++) {
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if (mdp->rx_skbuff[i])
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dev_kfree_skb(mdp->rx_skbuff[i]);
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}
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}
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kfree(mdp->rx_skbuff);
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/* Free Tx skb ringbuffer */
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if (mdp->tx_skbuff) {
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for (i = 0; i < TX_RING_SIZE; i++) {
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if (mdp->tx_skbuff[i])
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dev_kfree_skb(mdp->tx_skbuff[i]);
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}
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}
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kfree(mdp->tx_skbuff);
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}
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/* format skb and descriptor buffer */
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static void sh_eth_ring_format(struct net_device *ndev)
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{
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struct sh_eth_private *mdp = netdev_priv(ndev);
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int i;
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struct sk_buff *skb;
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struct sh_eth_rxdesc *rxdesc = NULL;
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struct sh_eth_txdesc *txdesc = NULL;
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int rx_ringsize = sizeof(*rxdesc) * RX_RING_SIZE;
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int tx_ringsize = sizeof(*txdesc) * TX_RING_SIZE;
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mdp->cur_rx = mdp->cur_tx = 0;
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mdp->dirty_rx = mdp->dirty_tx = 0;
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memset(mdp->rx_ring, 0, rx_ringsize);
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/* build Rx ring buffer */
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for (i = 0; i < RX_RING_SIZE; i++) {
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/* skb */
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mdp->rx_skbuff[i] = NULL;
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skb = dev_alloc_skb(mdp->rx_buf_sz);
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mdp->rx_skbuff[i] = skb;
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if (skb == NULL)
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break;
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skb->dev = ndev; /* Mark as being used by this device. */
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skb_reserve(skb, RX_OFFSET);
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/* RX descriptor */
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rxdesc = &mdp->rx_ring[i];
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rxdesc->addr = (u32)skb->data & ~0x3UL;
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rxdesc->status = cpu_to_le32(RD_RACT | RD_RFP);
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/* The size of the buffer is 16 byte boundary. */
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rxdesc->buffer_length = (mdp->rx_buf_sz + 16) & ~0x0F;
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}
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mdp->dirty_rx = (u32) (i - RX_RING_SIZE);
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/* Mark the last entry as wrapping the ring. */
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rxdesc->status |= cpu_to_le32(RC_RDEL);
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memset(mdp->tx_ring, 0, tx_ringsize);
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/* build Tx ring buffer */
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for (i = 0; i < TX_RING_SIZE; i++) {
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mdp->tx_skbuff[i] = NULL;
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txdesc = &mdp->tx_ring[i];
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txdesc->status = cpu_to_le32(TD_TFP);
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txdesc->buffer_length = 0;
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}
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txdesc->status |= cpu_to_le32(TD_TDLE);
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}
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/* Get skb and descriptor buffer */
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static int sh_eth_ring_init(struct net_device *ndev)
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{
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struct sh_eth_private *mdp = netdev_priv(ndev);
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int rx_ringsize, tx_ringsize, ret = 0;
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/*
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* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
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* card needs room to do 8 byte alignment, +2 so we can reserve
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* the first 2 bytes, and +16 gets room for the status word from the
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* card.
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*/
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mdp->rx_buf_sz = (ndev->mtu <= 1492 ? PKT_BUF_SZ :
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(((ndev->mtu + 26 + 7) & ~7) + 2 + 16));
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/* Allocate RX and TX skb rings */
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mdp->rx_skbuff = kmalloc(sizeof(*mdp->rx_skbuff) * RX_RING_SIZE,
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GFP_KERNEL);
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if (!mdp->rx_skbuff) {
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printk(KERN_ERR "%s: Cannot allocate Rx skb\n", ndev->name);
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ret = -ENOMEM;
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return ret;
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}
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mdp->tx_skbuff = kmalloc(sizeof(*mdp->tx_skbuff) * TX_RING_SIZE,
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GFP_KERNEL);
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if (!mdp->tx_skbuff) {
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printk(KERN_ERR "%s: Cannot allocate Tx skb\n", ndev->name);
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ret = -ENOMEM;
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goto skb_ring_free;
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}
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/* Allocate all Rx descriptors. */
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rx_ringsize = sizeof(struct sh_eth_rxdesc) * RX_RING_SIZE;
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mdp->rx_ring = dma_alloc_coherent(NULL, rx_ringsize, &mdp->rx_desc_dma,
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GFP_KERNEL);
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if (!mdp->rx_ring) {
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printk(KERN_ERR "%s: Cannot allocate Rx Ring (size %d bytes)\n",
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ndev->name, rx_ringsize);
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ret = -ENOMEM;
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goto desc_ring_free;
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}
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mdp->dirty_rx = 0;
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/* Allocate all Tx descriptors. */
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tx_ringsize = sizeof(struct sh_eth_txdesc) * TX_RING_SIZE;
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mdp->tx_ring = dma_alloc_coherent(NULL, tx_ringsize, &mdp->tx_desc_dma,
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GFP_KERNEL);
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if (!mdp->tx_ring) {
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printk(KERN_ERR "%s: Cannot allocate Tx Ring (size %d bytes)\n",
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ndev->name, tx_ringsize);
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ret = -ENOMEM;
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goto desc_ring_free;
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}
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return ret;
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desc_ring_free:
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/* free DMA buffer */
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dma_free_coherent(NULL, rx_ringsize, mdp->rx_ring, mdp->rx_desc_dma);
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skb_ring_free:
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/* Free Rx and Tx skb ring buffer */
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sh_eth_ring_free(ndev);
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return ret;
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}
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static int sh_eth_dev_init(struct net_device *ndev)
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{
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int ret = 0;
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struct sh_eth_private *mdp = netdev_priv(ndev);
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u32 ioaddr = ndev->base_addr;
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u_int32_t rx_int_var, tx_int_var;
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u32 val;
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/* Soft Reset */
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sh_eth_reset(ndev);
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ctrl_outl(RPADIR_PADS1, ioaddr + RPADIR); /* SH7712-DMA-RX-PAD2 */
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/* all sh_eth int mask */
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ctrl_outl(0, ioaddr + EESIPR);
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/* FIFO size set */
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ctrl_outl(0, ioaddr + EDMR); /* Endian change */
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ctrl_outl((FIFO_SIZE_T | FIFO_SIZE_R), ioaddr + FDR);
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ctrl_outl(0, ioaddr + TFTR);
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ctrl_outl(0, ioaddr + RMCR);
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rx_int_var = mdp->rx_int_var = DESC_I_RINT8 | DESC_I_RINT5;
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tx_int_var = mdp->tx_int_var = DESC_I_TINT2;
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ctrl_outl(rx_int_var | tx_int_var, ioaddr + TRSCER);
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ctrl_outl((FIFO_F_D_RFF | FIFO_F_D_RFD), ioaddr + FCFTR);
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ctrl_outl(0, ioaddr + TRIMD);
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/* Descriptor format */
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sh_eth_ring_format(ndev);
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ctrl_outl((u32)mdp->rx_ring, ioaddr + RDLAR);
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ctrl_outl((u32)mdp->tx_ring, ioaddr + TDLAR);
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ctrl_outl(ctrl_inl(ioaddr + EESR), ioaddr + EESR);
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ctrl_outl((DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff), ioaddr + EESIPR);
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/* PAUSE Prohibition */
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val = (ctrl_inl(ioaddr + ECMR) & ECMR_DM) |
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ECMR_ZPF | (mdp->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE;
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ctrl_outl(val, ioaddr + ECMR);
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ctrl_outl(ECSR_BRCRX | ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD |
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ECSIPR_MPDIP, ioaddr + ECSR);
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ctrl_outl(ECSIPR_BRCRXIP | ECSIPR_PSRTOIP | ECSIPR_LCHNGIP |
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ECSIPR_ICDIP | ECSIPR_MPDIP, ioaddr + ECSIPR);
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/* Set MAC address */
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update_mac_address(ndev);
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/* mask reset */
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#if defined(CONFIG_CPU_SUBTYPE_SH7710)
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ctrl_outl(APR_AP, ioaddr + APR);
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ctrl_outl(MPR_MP, ioaddr + MPR);
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ctrl_outl(TPAUSER_UNLIMITED, ioaddr + TPAUSER);
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ctrl_outl(BCFR_UNLIMITED, ioaddr + BCFR);
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#endif
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/* Setting the Rx mode will start the Rx process. */
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ctrl_outl(EDRRR_R, ioaddr + EDRRR);
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netif_start_queue(ndev);
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return ret;
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}
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/* free Tx skb function */
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static int sh_eth_txfree(struct net_device *ndev)
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{
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struct sh_eth_private *mdp = netdev_priv(ndev);
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struct sh_eth_txdesc *txdesc;
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int freeNum = 0;
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int entry = 0;
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for (; mdp->cur_tx - mdp->dirty_tx > 0; mdp->dirty_tx++) {
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entry = mdp->dirty_tx % TX_RING_SIZE;
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txdesc = &mdp->tx_ring[entry];
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if (txdesc->status & cpu_to_le32(TD_TACT))
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break;
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/* Free the original skb. */
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if (mdp->tx_skbuff[entry]) {
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dev_kfree_skb_irq(mdp->tx_skbuff[entry]);
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mdp->tx_skbuff[entry] = NULL;
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freeNum++;
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}
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txdesc->status = cpu_to_le32(TD_TFP);
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if (entry >= TX_RING_SIZE - 1)
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txdesc->status |= cpu_to_le32(TD_TDLE);
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mdp->stats.tx_packets++;
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mdp->stats.tx_bytes += txdesc->buffer_length;
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}
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return freeNum;
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}
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/* Packet receive function */
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static int sh_eth_rx(struct net_device *ndev)
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{
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struct sh_eth_private *mdp = netdev_priv(ndev);
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struct sh_eth_rxdesc *rxdesc;
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int entry = mdp->cur_rx % RX_RING_SIZE;
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int boguscnt = (mdp->dirty_rx + RX_RING_SIZE) - mdp->cur_rx;
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struct sk_buff *skb;
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u16 pkt_len = 0;
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u32 desc_status;
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rxdesc = &mdp->rx_ring[entry];
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while (!(rxdesc->status & cpu_to_le32(RD_RACT))) {
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desc_status = le32_to_cpu(rxdesc->status);
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pkt_len = rxdesc->frame_length;
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if (--boguscnt < 0)
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break;
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if (!(desc_status & RDFEND))
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mdp->stats.rx_length_errors++;
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if (desc_status & (RD_RFS1 | RD_RFS2 | RD_RFS3 | RD_RFS4 |
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RD_RFS5 | RD_RFS6 | RD_RFS10)) {
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mdp->stats.rx_errors++;
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if (desc_status & RD_RFS1)
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mdp->stats.rx_crc_errors++;
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if (desc_status & RD_RFS2)
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mdp->stats.rx_frame_errors++;
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if (desc_status & RD_RFS3)
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mdp->stats.rx_length_errors++;
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if (desc_status & RD_RFS4)
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mdp->stats.rx_length_errors++;
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if (desc_status & RD_RFS6)
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mdp->stats.rx_missed_errors++;
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if (desc_status & RD_RFS10)
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mdp->stats.rx_over_errors++;
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} else {
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swaps((char *)(rxdesc->addr & ~0x3), pkt_len + 2);
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skb = mdp->rx_skbuff[entry];
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mdp->rx_skbuff[entry] = NULL;
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skb_put(skb, pkt_len);
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skb->protocol = eth_type_trans(skb, ndev);
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netif_rx(skb);
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ndev->last_rx = jiffies;
|
|
mdp->stats.rx_packets++;
|
|
mdp->stats.rx_bytes += pkt_len;
|
|
}
|
|
rxdesc->status |= cpu_to_le32(RD_RACT);
|
|
entry = (++mdp->cur_rx) % RX_RING_SIZE;
|
|
}
|
|
|
|
/* Refill the Rx ring buffers. */
|
|
for (; mdp->cur_rx - mdp->dirty_rx > 0; mdp->dirty_rx++) {
|
|
entry = mdp->dirty_rx % RX_RING_SIZE;
|
|
rxdesc = &mdp->rx_ring[entry];
|
|
if (mdp->rx_skbuff[entry] == NULL) {
|
|
skb = dev_alloc_skb(mdp->rx_buf_sz);
|
|
mdp->rx_skbuff[entry] = skb;
|
|
if (skb == NULL)
|
|
break; /* Better luck next round. */
|
|
skb->dev = ndev;
|
|
skb_reserve(skb, RX_OFFSET);
|
|
rxdesc->addr = (u32)skb->data & ~0x3UL;
|
|
}
|
|
/* The size of the buffer is 16 byte boundary. */
|
|
rxdesc->buffer_length = (mdp->rx_buf_sz + 16) & ~0x0F;
|
|
if (entry >= RX_RING_SIZE - 1)
|
|
rxdesc->status |=
|
|
cpu_to_le32(RD_RACT | RD_RFP | RC_RDEL);
|
|
else
|
|
rxdesc->status |=
|
|
cpu_to_le32(RD_RACT | RD_RFP);
|
|
}
|
|
|
|
/* Restart Rx engine if stopped. */
|
|
/* If we don't need to check status, don't. -KDU */
|
|
ctrl_outl(EDRRR_R, ndev->base_addr + EDRRR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* error control function */
|
|
static void sh_eth_error(struct net_device *ndev, int intr_status)
|
|
{
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
u32 ioaddr = ndev->base_addr;
|
|
u32 felic_stat;
|
|
|
|
if (intr_status & EESR_ECI) {
|
|
felic_stat = ctrl_inl(ioaddr + ECSR);
|
|
ctrl_outl(felic_stat, ioaddr + ECSR); /* clear int */
|
|
if (felic_stat & ECSR_ICD)
|
|
mdp->stats.tx_carrier_errors++;
|
|
if (felic_stat & ECSR_LCHNG) {
|
|
/* Link Changed */
|
|
u32 link_stat = (ctrl_inl(ioaddr + PSR));
|
|
if (!(link_stat & PHY_ST_LINK)) {
|
|
/* Link Down : disable tx and rx */
|
|
ctrl_outl(ctrl_inl(ioaddr + ECMR) &
|
|
~(ECMR_RE | ECMR_TE), ioaddr + ECMR);
|
|
} else {
|
|
/* Link Up */
|
|
ctrl_outl(ctrl_inl(ioaddr + EESIPR) &
|
|
~DMAC_M_ECI, ioaddr + EESIPR);
|
|
/*clear int */
|
|
ctrl_outl(ctrl_inl(ioaddr + ECSR),
|
|
ioaddr + ECSR);
|
|
ctrl_outl(ctrl_inl(ioaddr + EESIPR) |
|
|
DMAC_M_ECI, ioaddr + EESIPR);
|
|
/* enable tx and rx */
|
|
ctrl_outl(ctrl_inl(ioaddr + ECMR) |
|
|
(ECMR_RE | ECMR_TE), ioaddr + ECMR);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (intr_status & EESR_TWB) {
|
|
/* Write buck end. unused write back interrupt */
|
|
if (intr_status & EESR_TABT) /* Transmit Abort int */
|
|
mdp->stats.tx_aborted_errors++;
|
|
}
|
|
|
|
if (intr_status & EESR_RABT) {
|
|
/* Receive Abort int */
|
|
if (intr_status & EESR_RFRMER) {
|
|
/* Receive Frame Overflow int */
|
|
mdp->stats.rx_frame_errors++;
|
|
printk(KERN_ERR "Receive Frame Overflow\n");
|
|
}
|
|
}
|
|
|
|
if (intr_status & EESR_ADE) {
|
|
if (intr_status & EESR_TDE) {
|
|
if (intr_status & EESR_TFE)
|
|
mdp->stats.tx_fifo_errors++;
|
|
}
|
|
}
|
|
|
|
if (intr_status & EESR_RDE) {
|
|
/* Receive Descriptor Empty int */
|
|
mdp->stats.rx_over_errors++;
|
|
|
|
if (ctrl_inl(ioaddr + EDRRR) ^ EDRRR_R)
|
|
ctrl_outl(EDRRR_R, ioaddr + EDRRR);
|
|
printk(KERN_ERR "Receive Descriptor Empty\n");
|
|
}
|
|
if (intr_status & EESR_RFE) {
|
|
/* Receive FIFO Overflow int */
|
|
mdp->stats.rx_fifo_errors++;
|
|
printk(KERN_ERR "Receive FIFO Overflow\n");
|
|
}
|
|
if (intr_status &
|
|
(EESR_TWB | EESR_TABT | EESR_ADE | EESR_TDE | EESR_TFE)) {
|
|
/* Tx error */
|
|
u32 edtrr = ctrl_inl(ndev->base_addr + EDTRR);
|
|
/* dmesg */
|
|
printk(KERN_ERR "%s:TX error. status=%8.8x cur_tx=%8.8x ",
|
|
ndev->name, intr_status, mdp->cur_tx);
|
|
printk(KERN_ERR "dirty_tx=%8.8x state=%8.8x EDTRR=%8.8x.\n",
|
|
mdp->dirty_tx, (u32) ndev->state, edtrr);
|
|
/* dirty buffer free */
|
|
sh_eth_txfree(ndev);
|
|
|
|
/* SH7712 BUG */
|
|
if (edtrr ^ EDTRR_TRNS) {
|
|
/* tx dma start */
|
|
ctrl_outl(EDTRR_TRNS, ndev->base_addr + EDTRR);
|
|
}
|
|
/* wakeup */
|
|
netif_wake_queue(ndev);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t sh_eth_interrupt(int irq, void *netdev)
|
|
{
|
|
struct net_device *ndev = netdev;
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
u32 ioaddr, boguscnt = RX_RING_SIZE;
|
|
u32 intr_status = 0;
|
|
|
|
ioaddr = ndev->base_addr;
|
|
spin_lock(&mdp->lock);
|
|
|
|
intr_status = ctrl_inl(ioaddr + EESR);
|
|
/* Clear interrupt */
|
|
ctrl_outl(intr_status, ioaddr + EESR);
|
|
|
|
if (intr_status & (EESR_FRC | EESR_RINT8 |
|
|
EESR_RINT5 | EESR_RINT4 | EESR_RINT3 | EESR_RINT2 |
|
|
EESR_RINT1))
|
|
sh_eth_rx(ndev);
|
|
if (intr_status & (EESR_FTC |
|
|
EESR_TINT4 | EESR_TINT3 | EESR_TINT2 | EESR_TINT1)) {
|
|
|
|
sh_eth_txfree(ndev);
|
|
netif_wake_queue(ndev);
|
|
}
|
|
|
|
if (intr_status & EESR_ERR_CHECK)
|
|
sh_eth_error(ndev, intr_status);
|
|
|
|
if (--boguscnt < 0) {
|
|
printk(KERN_WARNING
|
|
"%s: Too much work at interrupt, status=0x%4.4x.\n",
|
|
ndev->name, intr_status);
|
|
}
|
|
|
|
spin_unlock(&mdp->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void sh_eth_timer(unsigned long data)
|
|
{
|
|
struct net_device *ndev = (struct net_device *)data;
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
|
|
mod_timer(&mdp->timer, jiffies + (10 * HZ));
|
|
}
|
|
|
|
/* PHY state control function */
|
|
static void sh_eth_adjust_link(struct net_device *ndev)
|
|
{
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
struct phy_device *phydev = mdp->phydev;
|
|
u32 ioaddr = ndev->base_addr;
|
|
int new_state = 0;
|
|
|
|
if (phydev->link != PHY_DOWN) {
|
|
if (phydev->duplex != mdp->duplex) {
|
|
new_state = 1;
|
|
mdp->duplex = phydev->duplex;
|
|
}
|
|
|
|
if (phydev->speed != mdp->speed) {
|
|
new_state = 1;
|
|
mdp->speed = phydev->speed;
|
|
}
|
|
if (mdp->link == PHY_DOWN) {
|
|
ctrl_outl((ctrl_inl(ioaddr + ECMR) & ~ECMR_TXF)
|
|
| ECMR_DM, ioaddr + ECMR);
|
|
new_state = 1;
|
|
mdp->link = phydev->link;
|
|
}
|
|
} else if (mdp->link) {
|
|
new_state = 1;
|
|
mdp->link = PHY_DOWN;
|
|
mdp->speed = 0;
|
|
mdp->duplex = -1;
|
|
}
|
|
|
|
if (new_state)
|
|
phy_print_status(phydev);
|
|
}
|
|
|
|
/* PHY init function */
|
|
static int sh_eth_phy_init(struct net_device *ndev)
|
|
{
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
char phy_id[BUS_ID_SIZE];
|
|
struct phy_device *phydev = NULL;
|
|
|
|
snprintf(phy_id, BUS_ID_SIZE, PHY_ID_FMT,
|
|
mdp->mii_bus->id , mdp->phy_id);
|
|
|
|
mdp->link = PHY_DOWN;
|
|
mdp->speed = 0;
|
|
mdp->duplex = -1;
|
|
|
|
/* Try connect to PHY */
|
|
phydev = phy_connect(ndev, phy_id, &sh_eth_adjust_link,
|
|
0, PHY_INTERFACE_MODE_MII);
|
|
if (IS_ERR(phydev)) {
|
|
dev_err(&ndev->dev, "phy_connect failed\n");
|
|
return PTR_ERR(phydev);
|
|
}
|
|
dev_info(&ndev->dev, "attached phy %i to driver %s\n",
|
|
phydev->addr, phydev->drv->name);
|
|
|
|
mdp->phydev = phydev;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* PHY control start function */
|
|
static int sh_eth_phy_start(struct net_device *ndev)
|
|
{
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
int ret;
|
|
|
|
ret = sh_eth_phy_init(ndev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* reset phy - this also wakes it from PDOWN */
|
|
phy_write(mdp->phydev, MII_BMCR, BMCR_RESET);
|
|
phy_start(mdp->phydev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* network device open function */
|
|
static int sh_eth_open(struct net_device *ndev)
|
|
{
|
|
int ret = 0;
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
|
|
ret = request_irq(ndev->irq, &sh_eth_interrupt, 0, ndev->name, ndev);
|
|
if (ret) {
|
|
printk(KERN_ERR "Can not assign IRQ number to %s\n", CARDNAME);
|
|
return ret;
|
|
}
|
|
|
|
/* Descriptor set */
|
|
ret = sh_eth_ring_init(ndev);
|
|
if (ret)
|
|
goto out_free_irq;
|
|
|
|
/* device init */
|
|
ret = sh_eth_dev_init(ndev);
|
|
if (ret)
|
|
goto out_free_irq;
|
|
|
|
/* PHY control start*/
|
|
ret = sh_eth_phy_start(ndev);
|
|
if (ret)
|
|
goto out_free_irq;
|
|
|
|
/* Set the timer to check for link beat. */
|
|
init_timer(&mdp->timer);
|
|
mdp->timer.expires = (jiffies + (24 * HZ)) / 10;/* 2.4 sec. */
|
|
setup_timer(&mdp->timer, sh_eth_timer, ndev);
|
|
|
|
return ret;
|
|
|
|
out_free_irq:
|
|
free_irq(ndev->irq, ndev);
|
|
return ret;
|
|
}
|
|
|
|
/* Timeout function */
|
|
static void sh_eth_tx_timeout(struct net_device *ndev)
|
|
{
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
u32 ioaddr = ndev->base_addr;
|
|
struct sh_eth_rxdesc *rxdesc;
|
|
int i;
|
|
|
|
netif_stop_queue(ndev);
|
|
|
|
/* worning message out. */
|
|
printk(KERN_WARNING "%s: transmit timed out, status %8.8x,"
|
|
" resetting...\n", ndev->name, (int)ctrl_inl(ioaddr + EESR));
|
|
|
|
/* tx_errors count up */
|
|
mdp->stats.tx_errors++;
|
|
|
|
/* timer off */
|
|
del_timer_sync(&mdp->timer);
|
|
|
|
/* Free all the skbuffs in the Rx queue. */
|
|
for (i = 0; i < RX_RING_SIZE; i++) {
|
|
rxdesc = &mdp->rx_ring[i];
|
|
rxdesc->status = 0;
|
|
rxdesc->addr = 0xBADF00D0;
|
|
if (mdp->rx_skbuff[i])
|
|
dev_kfree_skb(mdp->rx_skbuff[i]);
|
|
mdp->rx_skbuff[i] = NULL;
|
|
}
|
|
for (i = 0; i < TX_RING_SIZE; i++) {
|
|
if (mdp->tx_skbuff[i])
|
|
dev_kfree_skb(mdp->tx_skbuff[i]);
|
|
mdp->tx_skbuff[i] = NULL;
|
|
}
|
|
|
|
/* device init */
|
|
sh_eth_dev_init(ndev);
|
|
|
|
/* timer on */
|
|
mdp->timer.expires = (jiffies + (24 * HZ)) / 10;/* 2.4 sec. */
|
|
add_timer(&mdp->timer);
|
|
}
|
|
|
|
/* Packet transmit function */
|
|
static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev)
|
|
{
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
struct sh_eth_txdesc *txdesc;
|
|
u32 entry;
|
|
int flags;
|
|
|
|
spin_lock_irqsave(&mdp->lock, flags);
|
|
if ((mdp->cur_tx - mdp->dirty_tx) >= (TX_RING_SIZE - 4)) {
|
|
if (!sh_eth_txfree(ndev)) {
|
|
netif_stop_queue(ndev);
|
|
spin_unlock_irqrestore(&mdp->lock, flags);
|
|
return 1;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&mdp->lock, flags);
|
|
|
|
entry = mdp->cur_tx % TX_RING_SIZE;
|
|
mdp->tx_skbuff[entry] = skb;
|
|
txdesc = &mdp->tx_ring[entry];
|
|
txdesc->addr = (u32)(skb->data);
|
|
/* soft swap. */
|
|
swaps((char *)(txdesc->addr & ~0x3), skb->len + 2);
|
|
/* write back */
|
|
__flush_purge_region(skb->data, skb->len);
|
|
if (skb->len < ETHERSMALL)
|
|
txdesc->buffer_length = ETHERSMALL;
|
|
else
|
|
txdesc->buffer_length = skb->len;
|
|
|
|
if (entry >= TX_RING_SIZE - 1)
|
|
txdesc->status |= cpu_to_le32(TD_TACT | TD_TDLE);
|
|
else
|
|
txdesc->status |= cpu_to_le32(TD_TACT);
|
|
|
|
mdp->cur_tx++;
|
|
|
|
ctrl_outl(EDTRR_TRNS, ndev->base_addr + EDTRR);
|
|
ndev->trans_start = jiffies;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* device close function */
|
|
static int sh_eth_close(struct net_device *ndev)
|
|
{
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
u32 ioaddr = ndev->base_addr;
|
|
int ringsize;
|
|
|
|
netif_stop_queue(ndev);
|
|
|
|
/* Disable interrupts by clearing the interrupt mask. */
|
|
ctrl_outl(0x0000, ioaddr + EESIPR);
|
|
|
|
/* Stop the chip's Tx and Rx processes. */
|
|
ctrl_outl(0, ioaddr + EDTRR);
|
|
ctrl_outl(0, ioaddr + EDRRR);
|
|
|
|
/* PHY Disconnect */
|
|
if (mdp->phydev) {
|
|
phy_stop(mdp->phydev);
|
|
phy_disconnect(mdp->phydev);
|
|
}
|
|
|
|
free_irq(ndev->irq, ndev);
|
|
|
|
del_timer_sync(&mdp->timer);
|
|
|
|
/* Free all the skbuffs in the Rx queue. */
|
|
sh_eth_ring_free(ndev);
|
|
|
|
/* free DMA buffer */
|
|
ringsize = sizeof(struct sh_eth_rxdesc) * RX_RING_SIZE;
|
|
dma_free_coherent(NULL, ringsize, mdp->rx_ring, mdp->rx_desc_dma);
|
|
|
|
/* free DMA buffer */
|
|
ringsize = sizeof(struct sh_eth_txdesc) * TX_RING_SIZE;
|
|
dma_free_coherent(NULL, ringsize, mdp->tx_ring, mdp->tx_desc_dma);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev)
|
|
{
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
u32 ioaddr = ndev->base_addr;
|
|
|
|
mdp->stats.tx_dropped += ctrl_inl(ioaddr + TROCR);
|
|
ctrl_outl(0, ioaddr + TROCR); /* (write clear) */
|
|
mdp->stats.collisions += ctrl_inl(ioaddr + CDCR);
|
|
ctrl_outl(0, ioaddr + CDCR); /* (write clear) */
|
|
mdp->stats.tx_carrier_errors += ctrl_inl(ioaddr + LCCR);
|
|
ctrl_outl(0, ioaddr + LCCR); /* (write clear) */
|
|
mdp->stats.tx_carrier_errors += ctrl_inl(ioaddr + CNDCR);
|
|
ctrl_outl(0, ioaddr + CNDCR); /* (write clear) */
|
|
|
|
return &mdp->stats;
|
|
}
|
|
|
|
/* ioctl to device funciotn*/
|
|
static int sh_eth_do_ioctl(struct net_device *ndev, struct ifreq *rq,
|
|
int cmd)
|
|
{
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
struct phy_device *phydev = mdp->phydev;
|
|
|
|
if (!netif_running(ndev))
|
|
return -EINVAL;
|
|
|
|
if (!phydev)
|
|
return -ENODEV;
|
|
|
|
return phy_mii_ioctl(phydev, if_mii(rq), cmd);
|
|
}
|
|
|
|
|
|
/* Multicast reception directions set */
|
|
static void sh_eth_set_multicast_list(struct net_device *ndev)
|
|
{
|
|
u32 ioaddr = ndev->base_addr;
|
|
|
|
if (ndev->flags & IFF_PROMISC) {
|
|
/* Set promiscuous. */
|
|
ctrl_outl((ctrl_inl(ioaddr + ECMR) & ~ECMR_MCT) | ECMR_PRM,
|
|
ioaddr + ECMR);
|
|
} else {
|
|
/* Normal, unicast/broadcast-only mode. */
|
|
ctrl_outl((ctrl_inl(ioaddr + ECMR) & ~ECMR_PRM) | ECMR_MCT,
|
|
ioaddr + ECMR);
|
|
}
|
|
}
|
|
|
|
/* SuperH's TSU register init function */
|
|
static void sh_eth_tsu_init(u32 ioaddr)
|
|
{
|
|
ctrl_outl(0, ioaddr + TSU_FWEN0); /* Disable forward(0->1) */
|
|
ctrl_outl(0, ioaddr + TSU_FWEN1); /* Disable forward(1->0) */
|
|
ctrl_outl(0, ioaddr + TSU_FCM); /* forward fifo 3k-3k */
|
|
ctrl_outl(0xc, ioaddr + TSU_BSYSL0);
|
|
ctrl_outl(0xc, ioaddr + TSU_BSYSL1);
|
|
ctrl_outl(0, ioaddr + TSU_PRISL0);
|
|
ctrl_outl(0, ioaddr + TSU_PRISL1);
|
|
ctrl_outl(0, ioaddr + TSU_FWSL0);
|
|
ctrl_outl(0, ioaddr + TSU_FWSL1);
|
|
ctrl_outl(TSU_FWSLC_POSTENU | TSU_FWSLC_POSTENL, ioaddr + TSU_FWSLC);
|
|
ctrl_outl(0, ioaddr + TSU_QTAGM0); /* Disable QTAG(0->1) */
|
|
ctrl_outl(0, ioaddr + TSU_QTAGM1); /* Disable QTAG(1->0) */
|
|
ctrl_outl(0, ioaddr + TSU_FWSR); /* all interrupt status clear */
|
|
ctrl_outl(0, ioaddr + TSU_FWINMK); /* Disable all interrupt */
|
|
ctrl_outl(0, ioaddr + TSU_TEN); /* Disable all CAM entry */
|
|
ctrl_outl(0, ioaddr + TSU_POST1); /* Disable CAM entry [ 0- 7] */
|
|
ctrl_outl(0, ioaddr + TSU_POST2); /* Disable CAM entry [ 8-15] */
|
|
ctrl_outl(0, ioaddr + TSU_POST3); /* Disable CAM entry [16-23] */
|
|
ctrl_outl(0, ioaddr + TSU_POST4); /* Disable CAM entry [24-31] */
|
|
}
|
|
|
|
/* MDIO bus release function */
|
|
static int sh_mdio_release(struct net_device *ndev)
|
|
{
|
|
struct mii_bus *bus = dev_get_drvdata(&ndev->dev);
|
|
|
|
/* unregister mdio bus */
|
|
mdiobus_unregister(bus);
|
|
|
|
/* remove mdio bus info from net_device */
|
|
dev_set_drvdata(&ndev->dev, NULL);
|
|
|
|
/* free bitbang info */
|
|
free_mdio_bitbang(bus);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* MDIO bus init function */
|
|
static int sh_mdio_init(struct net_device *ndev, int id)
|
|
{
|
|
int ret, i;
|
|
struct bb_info *bitbang;
|
|
struct sh_eth_private *mdp = netdev_priv(ndev);
|
|
|
|
/* create bit control struct for PHY */
|
|
bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL);
|
|
if (!bitbang) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/* bitbang init */
|
|
bitbang->addr = ndev->base_addr + PIR;
|
|
bitbang->mdi_msk = 0x08;
|
|
bitbang->mdo_msk = 0x04;
|
|
bitbang->mmd_msk = 0x02;/* MMD */
|
|
bitbang->mdc_msk = 0x01;
|
|
bitbang->ctrl.ops = &bb_ops;
|
|
|
|
/* MII contorller setting */
|
|
mdp->mii_bus = alloc_mdio_bitbang(&bitbang->ctrl);
|
|
if (!mdp->mii_bus) {
|
|
ret = -ENOMEM;
|
|
goto out_free_bitbang;
|
|
}
|
|
|
|
/* Hook up MII support for ethtool */
|
|
mdp->mii_bus->name = "sh_mii";
|
|
mdp->mii_bus->dev = &ndev->dev;
|
|
mdp->mii_bus->id[0] = id;
|
|
|
|
/* PHY IRQ */
|
|
mdp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
|
|
if (!mdp->mii_bus->irq) {
|
|
ret = -ENOMEM;
|
|
goto out_free_bus;
|
|
}
|
|
|
|
for (i = 0; i < PHY_MAX_ADDR; i++)
|
|
mdp->mii_bus->irq[i] = PHY_POLL;
|
|
|
|
/* regist mdio bus */
|
|
ret = mdiobus_register(mdp->mii_bus);
|
|
if (ret)
|
|
goto out_free_irq;
|
|
|
|
dev_set_drvdata(&ndev->dev, mdp->mii_bus);
|
|
|
|
return 0;
|
|
|
|
out_free_irq:
|
|
kfree(mdp->mii_bus->irq);
|
|
|
|
out_free_bus:
|
|
kfree(mdp->mii_bus);
|
|
|
|
out_free_bitbang:
|
|
kfree(bitbang);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int sh_eth_drv_probe(struct platform_device *pdev)
|
|
{
|
|
int ret, i, devno = 0;
|
|
struct resource *res;
|
|
struct net_device *ndev = NULL;
|
|
struct sh_eth_private *mdp;
|
|
|
|
/* get base addr */
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (unlikely(res == NULL)) {
|
|
dev_err(&pdev->dev, "invalid resource\n");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ndev = alloc_etherdev(sizeof(struct sh_eth_private));
|
|
if (!ndev) {
|
|
printk(KERN_ERR "%s: could not allocate device.\n", CARDNAME);
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/* The sh Ether-specific entries in the device structure. */
|
|
ndev->base_addr = res->start;
|
|
devno = pdev->id;
|
|
if (devno < 0)
|
|
devno = 0;
|
|
|
|
ndev->dma = -1;
|
|
ndev->irq = platform_get_irq(pdev, 0);
|
|
if (ndev->irq < 0) {
|
|
ret = -ENODEV;
|
|
goto out_release;
|
|
}
|
|
|
|
SET_NETDEV_DEV(ndev, &pdev->dev);
|
|
|
|
/* Fill in the fields of the device structure with ethernet values. */
|
|
ether_setup(ndev);
|
|
|
|
mdp = netdev_priv(ndev);
|
|
spin_lock_init(&mdp->lock);
|
|
|
|
/* get PHY ID */
|
|
mdp->phy_id = (int)pdev->dev.platform_data;
|
|
|
|
/* set function */
|
|
ndev->open = sh_eth_open;
|
|
ndev->hard_start_xmit = sh_eth_start_xmit;
|
|
ndev->stop = sh_eth_close;
|
|
ndev->get_stats = sh_eth_get_stats;
|
|
ndev->set_multicast_list = sh_eth_set_multicast_list;
|
|
ndev->do_ioctl = sh_eth_do_ioctl;
|
|
ndev->tx_timeout = sh_eth_tx_timeout;
|
|
ndev->watchdog_timeo = TX_TIMEOUT;
|
|
|
|
mdp->post_rx = POST_RX >> (devno << 1);
|
|
mdp->post_fw = POST_FW >> (devno << 1);
|
|
|
|
/* read and set MAC address */
|
|
read_mac_address(ndev);
|
|
|
|
/* First device only init */
|
|
if (!devno) {
|
|
/* reset device */
|
|
ctrl_outl(ARSTR_ARSTR, ndev->base_addr + ARSTR);
|
|
mdelay(1);
|
|
|
|
/* TSU init (Init only)*/
|
|
sh_eth_tsu_init(SH_TSU_ADDR);
|
|
}
|
|
|
|
/* network device register */
|
|
ret = register_netdev(ndev);
|
|
if (ret)
|
|
goto out_release;
|
|
|
|
/* mdio bus init */
|
|
ret = sh_mdio_init(ndev, pdev->id);
|
|
if (ret)
|
|
goto out_unregister;
|
|
|
|
/* pritnt device infomation */
|
|
printk(KERN_INFO "%s: %s at 0x%x, ",
|
|
ndev->name, CARDNAME, (u32) ndev->base_addr);
|
|
|
|
for (i = 0; i < 5; i++)
|
|
printk(KERN_INFO "%2.2x:", ndev->dev_addr[i]);
|
|
printk(KERN_INFO "%2.2x, IRQ %d.\n", ndev->dev_addr[i], ndev->irq);
|
|
|
|
platform_set_drvdata(pdev, ndev);
|
|
|
|
return ret;
|
|
|
|
out_unregister:
|
|
unregister_netdev(ndev);
|
|
|
|
out_release:
|
|
/* net_dev free */
|
|
if (ndev)
|
|
free_netdev(ndev);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int sh_eth_drv_remove(struct platform_device *pdev)
|
|
{
|
|
struct net_device *ndev = platform_get_drvdata(pdev);
|
|
|
|
sh_mdio_release(ndev);
|
|
unregister_netdev(ndev);
|
|
flush_scheduled_work();
|
|
|
|
free_netdev(ndev);
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver sh_eth_driver = {
|
|
.probe = sh_eth_drv_probe,
|
|
.remove = sh_eth_drv_remove,
|
|
.driver = {
|
|
.name = CARDNAME,
|
|
},
|
|
};
|
|
|
|
static int __init sh_eth_init(void)
|
|
{
|
|
return platform_driver_register(&sh_eth_driver);
|
|
}
|
|
|
|
static void __exit sh_eth_cleanup(void)
|
|
{
|
|
platform_driver_unregister(&sh_eth_driver);
|
|
}
|
|
|
|
module_init(sh_eth_init);
|
|
module_exit(sh_eth_cleanup);
|
|
|
|
MODULE_AUTHOR("Nobuhiro Iwamatsu, Yoshihiro Shimoda");
|
|
MODULE_DESCRIPTION("Renesas SuperH Ethernet driver");
|
|
MODULE_LICENSE("GPL v2");
|