diff options
Diffstat (limited to 'drivers/net/sh_eth.c')
| -rw-r--r-- | drivers/net/sh_eth.c | 1174 |
1 files changed, 1174 insertions, 0 deletions
diff --git a/drivers/net/sh_eth.c b/drivers/net/sh_eth.c new file mode 100644 index 0000000..a4bc812 --- /dev/null +++ b/drivers/net/sh_eth.c @@ -0,0 +1,1174 @@ +/* + * SuperH Ethernet device driver + * + * Copyright (C) 2006,2007 Nobuhiro Iwamatsu + * Copyright (C) 2008 Renesas Solutions Corp. + * + * 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". + */ + +#include <linux/version.h> +#include <linux/init.h> +#include <linux/dma-mapping.h> +#include <linux/etherdevice.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/mdio-bitbang.h> +#include <linux/netdevice.h> +#include <linux/phy.h> +#include <linux/cache.h> +#include <linux/io.h> + +#include "sh_eth.h" + +/* + * Program the hardware MAC address from dev->dev_addr. + */ +static void update_mac_address(struct net_device *ndev) +{ + u32 ioaddr = ndev->base_addr; + + ctrl_outl((ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) | + (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), + ioaddr + MAHR); + ctrl_outl((ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]), + ioaddr + MALR); +} + +/* + * Get MAC address from SuperH MAC address register + * + * SuperH's Ethernet device doesn't have 'ROM' to MAC address. + * This driver get MAC address that use by bootloader(U-boot or sh-ipl+g). + * When you want use this device, you must set MAC address in bootloader. + * + */ +static void read_mac_address(struct net_device *ndev) +{ + u32 ioaddr = ndev->base_addr; + + ndev->dev_addr[0] = (ctrl_inl(ioaddr + MAHR) >> 24); + ndev->dev_addr[1] = (ctrl_inl(ioaddr + MAHR) >> 16) & 0xFF; + ndev->dev_addr[2] = (ctrl_inl(ioaddr + MAHR) >> 8) & 0xFF; + ndev->dev_addr[3] = (ctrl_inl(ioaddr + MAHR) & 0xFF); + ndev->dev_addr[4] = (ctrl_inl(ioaddr + MALR) >> 8) & 0xFF; + ndev->dev_addr[5] = (ctrl_inl(ioaddr + MALR) & 0xFF); +} + +struct bb_info { + struct mdiobb_ctrl ctrl; + u32 addr; + u32 mmd_msk;/* MMD */ + u32 mdo_msk; + u32 mdi_msk; + u32 mdc_msk; +}; + +/* PHY bit set */ +static void bb_set(u32 addr, u32 msk) +{ + ctrl_outl(ctrl_inl(addr) | msk, addr); +} + +/* PHY bit clear */ +static void bb_clr(u32 addr, u32 msk) +{ + ctrl_outl((ctrl_inl(addr) & ~msk), addr); +} + +/* PHY bit read */ +static int bb_read(u32 addr, u32 msk) +{ + return (ctrl_inl(addr) & msk) != 0; +} + +/* Data I/O pin control */ +static void sh_mmd_ctrl(struct mdiobb_ctrl *ctrl, int bit) +{ + struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl); + if (bit) + bb_set(bitbang->addr, bitbang->mmd_msk); + else + bb_clr(bitbang->addr, bitbang->mmd_msk); +} + +/* Set bit data*/ +static void sh_set_mdio(struct mdiobb_ctrl *ctrl, int bit) +{ + struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl); + + if (bit) + bb_set(bitbang->addr, bitbang->mdo_msk); + else + bb_clr(bitbang->addr, bitbang->mdo_msk); +} + +/* Get bit data*/ +static int sh_get_mdio(struct mdiobb_ctrl *ctrl) +{ + struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl); + return bb_read(bitbang->addr, bitbang->mdi_msk); +} + +/* MDC pin control */ +static void sh_mdc_ctrl(struct mdiobb_ctrl *ctrl, int bit) +{ + struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl); + + if (bit) + bb_set(bitbang->addr, bitbang->mdc_msk); + else + bb_clr(bitbang->addr, bitbang->mdc_msk); +} + +/* mdio bus control struct */ +static struct mdiobb_ops bb_ops = { + .owner = THIS_MODULE, + .set_mdc = sh_mdc_ctrl, + .set_mdio_dir = sh_mmd_ctrl, + .set_mdio_data = sh_set_mdio, + .get_mdio_data = sh_get_mdio, +}; + +static void sh_eth_reset(struct net_device *ndev) +{ + u32 ioaddr = ndev->base_addr; + + ctrl_outl(ctrl_inl(ioaddr + EDMR) | EDMR_SRST, ioaddr + EDMR); + mdelay(3); + ctrl_outl(ctrl_inl(ioaddr + EDMR) & ~EDMR_SRST, ioaddr + EDMR); +} + +/* free skb and descriptor buffer */ +static void sh_eth_ring_free(struct net_device *ndev) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + int i; + + /* Free Rx skb ringbuffer */ + if (mdp->rx_skbuff) { + for (i = 0; i < RX_RING_SIZE; i++) { + if (mdp->rx_skbuff[i]) + dev_kfree_skb(mdp->rx_skbuff[i]); + } + } + kfree(mdp->rx_skbuff); + + /* Free Tx skb ringbuffer */ + if (mdp->tx_skbuff) { + for (i = 0; i < TX_RING_SIZE; i++) { + if (mdp->tx_skbuff[i]) + dev_kfree_skb(mdp->tx_skbuff[i]); + } + } + kfree(mdp->tx_skbuff); +} + +/* format skb and descriptor buffer */ +static void sh_eth_ring_format(struct net_device *ndev) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + int i; + struct sk_buff *skb; + struct sh_eth_rxdesc *rxdesc = NULL; + struct sh_eth_txdesc *txdesc = NULL; + int rx_ringsize = sizeof(*rxdesc) * RX_RING_SIZE; + int tx_ringsize = sizeof(*txdesc) * TX_RING_SIZE; + + mdp->cur_rx = mdp->cur_tx = 0; + mdp->dirty_rx = mdp->dirty_tx = 0; + + memset(mdp->rx_ring, 0, rx_ringsize); + + /* build Rx ring buffer */ + for (i = 0; i < RX_RING_SIZE; i++) { + /* skb */ + mdp->rx_skbuff[i] = NULL; + skb = dev_alloc_skb(mdp->rx_buf_sz); + mdp->rx_skbuff[i] = skb; + if (skb == NULL) + break; + skb->dev = ndev; /* Mark as being used by this device. */ + skb_reserve(skb, RX_OFFSET); + + /* RX descriptor */ + rxdesc = &mdp->rx_ring[i]; + rxdesc->addr = (u32)skb->data & ~0x3UL; + rxdesc->status = cpu_to_le32(RD_RACT | RD_RFP); + + /* The size of the buffer is 16 byte boundary. */ + rxdesc->buffer_length = (mdp->rx_buf_sz + 16) & ~0x0F; + } + + mdp->dirty_rx = (u32) (i - RX_RING_SIZE); + + /* Mark the last entry as wrapping the ring. */ + rxdesc->status |= cpu_to_le32(RC_RDEL); + + memset(mdp->tx_ring, 0, tx_ringsize); + + /* build Tx ring buffer */ + for (i = 0; i < TX_RING_SIZE; i++) { + mdp->tx_skbuff[i] = NULL; + txdesc = &mdp->tx_ring[i]; + txdesc->status = cpu_to_le32(TD_TFP); + txdesc->buffer_length = 0; + } + + txdesc->status |= cpu_to_le32(TD_TDLE); +} + +/* Get skb and descriptor buffer */ +static int sh_eth_ring_init(struct net_device *ndev) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + int rx_ringsize, tx_ringsize, ret = 0; + + /* + * +26 gets the maximum ethernet encapsulation, +7 & ~7 because the + * card needs room to do 8 byte alignment, +2 so we can reserve + * the first 2 bytes, and +16 gets room for the status word from the + * card. + */ + mdp->rx_buf_sz = (ndev->mtu <= 1492 ? PKT_BUF_SZ : + (((ndev->mtu + 26 + 7) & ~7) + 2 + 16)); + + /* Allocate RX and TX skb rings */ + mdp->rx_skbuff = kmalloc(sizeof(*mdp->rx_skbuff) * RX_RING_SIZE, + GFP_KERNEL); + if (!mdp->rx_skbuff) { + printk(KERN_ERR "%s: Cannot allocate Rx skb\n", ndev->name); + ret = -ENOMEM; + return ret; + } + + mdp->tx_skbuff = kmalloc(sizeof(*mdp->tx_skbuff) * TX_RING_SIZE, + GFP_KERNEL); + if (!mdp->tx_skbuff) { + printk(KERN_ERR "%s: Cannot allocate Tx skb\n", ndev->name); + ret = -ENOMEM; + goto skb_ring_free; + } + + /* Allocate all Rx descriptors. */ + rx_ringsize = sizeof(struct sh_eth_rxdesc) * RX_RING_SIZE; + mdp->rx_ring = dma_alloc_coherent(NULL, rx_ringsize, &mdp->rx_desc_dma, + GFP_KERNEL); + + if (!mdp->rx_ring) { + printk(KERN_ERR "%s: Cannot allocate Rx Ring (size %d bytes)\n", + ndev->name, rx_ringsize); + ret = -ENOMEM; + goto desc_ring_free; + } + + mdp->dirty_rx = 0; + + /* Allocate all Tx descriptors. */ + tx_ringsize = sizeof(struct sh_eth_txdesc) * TX_RING_SIZE; + mdp->tx_ring = dma_alloc_coherent(NULL, tx_ringsize, &mdp->tx_desc_dma, + GFP_KERNEL); + if (!mdp->tx_ring) { + printk(KERN_ERR "%s: Cannot allocate Tx Ring (size %d bytes)\n", + ndev->name, tx_ringsize); + ret = -ENOMEM; + goto desc_ring_free; + } + return ret; + +desc_ring_free: + /* free DMA buffer */ + dma_free_coherent(NULL, rx_ringsize, mdp->rx_ring, mdp->rx_desc_dma); + +skb_ring_free: + /* Free Rx and Tx skb ring buffer */ + sh_eth_ring_free(ndev); + + return ret; +} + +static int sh_eth_dev_init(struct net_device *ndev) +{ + int ret = 0; + struct sh_eth_private *mdp = netdev_priv(ndev); + u32 ioaddr = ndev->base_addr; + u_int32_t rx_int_var, tx_int_var; + u32 val; + + /* Soft Reset */ + sh_eth_reset(ndev); + + ctrl_outl(RPADIR_PADS1, ioaddr + RPADIR); /* SH7712-DMA-RX-PAD2 */ + + /* all sh_eth int mask */ + ctrl_outl(0, ioaddr + EESIPR); + + /* FIFO size set */ + ctrl_outl(0, ioaddr + EDMR); /* Endian change */ + + ctrl_outl((FIFO_SIZE_T | FIFO_SIZE_R), ioaddr + FDR); + ctrl_outl(0, ioaddr + TFTR); + + ctrl_outl(0, ioaddr + RMCR); + + rx_int_var = mdp->rx_int_var = DESC_I_RINT8 | DESC_I_RINT5; + tx_int_var = mdp->tx_int_var = DESC_I_TINT2; + ctrl_outl(rx_int_var | tx_int_var, ioaddr + TRSCER); + + ctrl_outl((FIFO_F_D_RFF | FIFO_F_D_RFD), ioaddr + FCFTR); + ctrl_outl(0, ioaddr + TRIMD); + + /* Descriptor format */ + sh_eth_ring_format(ndev); + + ctrl_outl((u32)mdp->rx_ring, ioaddr + RDLAR); + ctrl_outl((u32)mdp->tx_ring, ioaddr + TDLAR); + + ctrl_outl(ctrl_inl(ioaddr + EESR), ioaddr + EESR); + ctrl_outl((DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff), ioaddr + EESIPR); + + /* PAUSE Prohibition */ + val = (ctrl_inl(ioaddr + ECMR) & ECMR_DM) | + ECMR_ZPF | (mdp->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE; + + ctrl_outl(val, ioaddr + ECMR); + ctrl_outl(ECSR_BRCRX | ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD | + ECSIPR_MPDIP, ioaddr + ECSR); + ctrl_outl(ECSIPR_BRCRXIP | ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | + ECSIPR_ICDIP | ECSIPR_MPDIP, ioaddr + ECSIPR); + + /* Set MAC address */ + update_mac_address(ndev); + + /* mask reset */ +#if defined(CONFIG_CPU_SUBTYPE_SH7710) + ctrl_outl(APR_AP, ioaddr + APR); + ctrl_outl(MPR_MP, ioaddr + MPR); + ctrl_outl(TPAUSER_UNLIMITED, ioaddr + TPAUSER); + ctrl_outl(BCFR_UNLIMITED, ioaddr + BCFR); +#endif + /* Setting the Rx mode will start the Rx process. */ + ctrl_outl(EDRRR_R, ioaddr + EDRRR); + + netif_start_queue(ndev); + + return ret; +} + +/* free Tx skb function */ +static int sh_eth_txfree(struct net_device *ndev) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + struct sh_eth_txdesc *txdesc; + int freeNum = 0; + int entry = 0; + + for (; mdp->cur_tx - mdp->dirty_tx > 0; mdp->dirty_tx++) { + entry = mdp->dirty_tx % TX_RING_SIZE; + txdesc = &mdp->tx_ring[entry]; + if (txdesc->status & cpu_to_le32(TD_TACT)) + break; + /* Free the original skb. */ + if (mdp->tx_skbuff[entry]) { + dev_kfree_skb_irq(mdp->tx_skbuff[entry]); + mdp->tx_skbuff[entry] = NULL; + freeNum++; + } + txdesc->status = cpu_to_le32(TD_TFP); + if (entry >= TX_RING_SIZE - 1) + txdesc->status |= cpu_to_le32(TD_TDLE); + + mdp->stats.tx_packets++; + mdp->stats.tx_bytes += txdesc->buffer_length; + } + return freeNum; +} + +/* Packet receive function */ +static int sh_eth_rx(struct net_device *ndev) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + struct sh_eth_rxdesc *rxdesc; + + int entry = mdp->cur_rx % RX_RING_SIZE; + int boguscnt = (mdp->dirty_rx + RX_RING_SIZE) - mdp->cur_rx; + struct sk_buff *skb; + u16 pkt_len = 0; + u32 desc_status; + + rxdesc = &mdp->rx_ring[entry]; + while (!(rxdesc->status & cpu_to_le32(RD_RACT))) { + desc_status = le32_to_cpu(rxdesc->status); + pkt_len = rxdesc->frame_length; + + if (--boguscnt < 0) + break; + + if (!(desc_status & RDFEND)) + mdp->stats.rx_length_errors++; + + if (desc_status & (RD_RFS1 | RD_RFS2 | RD_RFS3 | RD_RFS4 | + RD_RFS5 | RD_RFS6 | RD_RFS10)) { + mdp->stats.rx_errors++; + if (desc_status & RD_RFS1) + mdp->stats.rx_crc_errors++; + if (desc_status & RD_RFS2) + mdp->stats.rx_frame_errors++; + if (desc_status & RD_RFS3) + mdp->stats.rx_length_errors++; + if (desc_status & RD_RFS4) + mdp->stats.rx_length_errors++; + if (desc_status & RD_RFS6) + mdp->stats.rx_missed_errors++; + if (desc_status & RD_RFS10) + mdp->stats.rx_over_errors++; + } else { + swaps((char *)(rxdesc->addr & ~0x3), pkt_len + 2); + skb = mdp->rx_skbuff[entry]; + mdp->rx_skbuff[entry] = NULL; + skb_put(skb, pkt_len); + skb->protocol = eth_type_trans(skb, ndev); + netif_rx(skb); + 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; + netif_tx_schedule_all(ndev); + netif_carrier_on(ndev); + netif_start_queue(ndev); + } + } else if (mdp->link) { + new_state = 1; + mdp->link = PHY_DOWN; + mdp->speed = 0; + mdp->duplex = -1; + netif_stop_queue(ndev); + netif_carrier_off(ndev); + } + + 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"); |
