diff options
Diffstat (limited to 'drivers/net/korina.c')
| -rw-r--r-- | drivers/net/korina.c | 1251 |
1 files changed, 0 insertions, 1251 deletions
diff --git a/drivers/net/korina.c b/drivers/net/korina.c deleted file mode 100644 index 763844c587fd..000000000000 --- a/drivers/net/korina.c +++ /dev/null @@ -1,1251 +0,0 @@ -/* - * Driver for the IDT RC32434 (Korina) on-chip ethernet controller. - * - * Copyright 2004 IDT Inc. (rischelp@idt.com) - * Copyright 2006 Felix Fietkau <nbd@openwrt.org> - * Copyright 2008 Florian Fainelli <florian@openwrt.org> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN - * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON - * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * 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., - * 675 Mass Ave, Cambridge, MA 02139, USA. - * - * Writing to a DMA status register: - * - * When writing to the status register, you should mask the bit you have - * been testing the status register with. Both Tx and Rx DMA registers - * should stick to this procedure. - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/moduleparam.h> -#include <linux/sched.h> -#include <linux/ctype.h> -#include <linux/types.h> -#include <linux/interrupt.h> -#include <linux/init.h> -#include <linux/ioport.h> -#include <linux/in.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <linux/delay.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> -#include <linux/errno.h> -#include <linux/platform_device.h> -#include <linux/mii.h> -#include <linux/ethtool.h> -#include <linux/crc32.h> - -#include <asm/bootinfo.h> -#include <asm/system.h> -#include <asm/bitops.h> -#include <asm/pgtable.h> -#include <asm/segment.h> -#include <asm/io.h> -#include <asm/dma.h> - -#include <asm/mach-rc32434/rb.h> -#include <asm/mach-rc32434/rc32434.h> -#include <asm/mach-rc32434/eth.h> -#include <asm/mach-rc32434/dma_v.h> - -#define DRV_NAME "korina" -#define DRV_VERSION "0.10" -#define DRV_RELDATE "04Mar2008" - -#define STATION_ADDRESS_HIGH(dev) (((dev)->dev_addr[0] << 8) | \ - ((dev)->dev_addr[1])) -#define STATION_ADDRESS_LOW(dev) (((dev)->dev_addr[2] << 24) | \ - ((dev)->dev_addr[3] << 16) | \ - ((dev)->dev_addr[4] << 8) | \ - ((dev)->dev_addr[5])) - -#define MII_CLOCK 1250000 /* no more than 2.5MHz */ - -/* the following must be powers of two */ -#define KORINA_NUM_RDS 64 /* number of receive descriptors */ -#define KORINA_NUM_TDS 64 /* number of transmit descriptors */ - -/* KORINA_RBSIZE is the hardware's default maximum receive - * frame size in bytes. Having this hardcoded means that there - * is no support for MTU sizes greater than 1500. */ -#define KORINA_RBSIZE 1536 /* size of one resource buffer = Ether MTU */ -#define KORINA_RDS_MASK (KORINA_NUM_RDS - 1) -#define KORINA_TDS_MASK (KORINA_NUM_TDS - 1) -#define RD_RING_SIZE (KORINA_NUM_RDS * sizeof(struct dma_desc)) -#define TD_RING_SIZE (KORINA_NUM_TDS * sizeof(struct dma_desc)) - -#define TX_TIMEOUT (6000 * HZ / 1000) - -enum chain_status { desc_filled, desc_empty }; -#define IS_DMA_FINISHED(X) (((X) & (DMA_DESC_FINI)) != 0) -#define IS_DMA_DONE(X) (((X) & (DMA_DESC_DONE)) != 0) -#define RCVPKT_LENGTH(X) (((X) & ETH_RX_LEN) >> ETH_RX_LEN_BIT) - -/* Information that need to be kept for each board. */ -struct korina_private { - struct eth_regs *eth_regs; - struct dma_reg *rx_dma_regs; - struct dma_reg *tx_dma_regs; - struct dma_desc *td_ring; /* transmit descriptor ring */ - struct dma_desc *rd_ring; /* receive descriptor ring */ - - struct sk_buff *tx_skb[KORINA_NUM_TDS]; - struct sk_buff *rx_skb[KORINA_NUM_RDS]; - - int rx_next_done; - int rx_chain_head; - int rx_chain_tail; - enum chain_status rx_chain_status; - - int tx_next_done; - int tx_chain_head; - int tx_chain_tail; - enum chain_status tx_chain_status; - int tx_count; - int tx_full; - - int rx_irq; - int tx_irq; - int ovr_irq; - int und_irq; - - spinlock_t lock; /* NIC xmit lock */ - - int dma_halt_cnt; - int dma_run_cnt; - struct napi_struct napi; - struct timer_list media_check_timer; - struct mii_if_info mii_if; - struct work_struct restart_task; - struct net_device *dev; - int phy_addr; -}; - -extern unsigned int idt_cpu_freq; - -static inline void korina_start_dma(struct dma_reg *ch, u32 dma_addr) -{ - writel(0, &ch->dmandptr); - writel(dma_addr, &ch->dmadptr); -} - -static inline void korina_abort_dma(struct net_device *dev, - struct dma_reg *ch) -{ - if (readl(&ch->dmac) & DMA_CHAN_RUN_BIT) { - writel(0x10, &ch->dmac); - - while (!(readl(&ch->dmas) & DMA_STAT_HALT)) - dev->trans_start = jiffies; - - writel(0, &ch->dmas); - } - - writel(0, &ch->dmadptr); - writel(0, &ch->dmandptr); -} - -static inline void korina_chain_dma(struct dma_reg *ch, u32 dma_addr) -{ - writel(dma_addr, &ch->dmandptr); -} - -static void korina_abort_tx(struct net_device *dev) -{ - struct korina_private *lp = netdev_priv(dev); - - korina_abort_dma(dev, lp->tx_dma_regs); -} - -static void korina_abort_rx(struct net_device *dev) -{ - struct korina_private *lp = netdev_priv(dev); - - korina_abort_dma(dev, lp->rx_dma_regs); -} - -static void korina_start_rx(struct korina_private *lp, - struct dma_desc *rd) -{ - korina_start_dma(lp->rx_dma_regs, CPHYSADDR(rd)); -} - -static void korina_chain_rx(struct korina_private *lp, - struct dma_desc *rd) -{ - korina_chain_dma(lp->rx_dma_regs, CPHYSADDR(rd)); -} - -/* transmit packet */ -static int korina_send_packet(struct sk_buff *skb, struct net_device *dev) -{ - struct korina_private *lp = netdev_priv(dev); - unsigned long flags; - u32 length; - u32 chain_prev, chain_next; - struct dma_desc *td; - - spin_lock_irqsave(&lp->lock, flags); - - td = &lp->td_ring[lp->tx_chain_tail]; - - /* stop queue when full, drop pkts if queue already full */ - if (lp->tx_count >= (KORINA_NUM_TDS - 2)) { - lp->tx_full = 1; - - if (lp->tx_count == (KORINA_NUM_TDS - 2)) - netif_stop_queue(dev); - else { - dev->stats.tx_dropped++; - dev_kfree_skb_any(skb); - spin_unlock_irqrestore(&lp->lock, flags); - - return NETDEV_TX_BUSY; - } - } - - lp->tx_count++; - - lp->tx_skb[lp->tx_chain_tail] = skb; - - length = skb->len; - dma_cache_wback((u32)skb->data, skb->len); - - /* Setup the transmit descriptor. */ - dma_cache_inv((u32) td, sizeof(*td)); - td->ca = CPHYSADDR(skb->data); - chain_prev = (lp->tx_chain_tail - 1) & KORINA_TDS_MASK; - chain_next = (lp->tx_chain_tail + 1) & KORINA_TDS_MASK; - - if (readl(&(lp->tx_dma_regs->dmandptr)) == 0) { - if (lp->tx_chain_status == desc_empty) { - /* Update tail */ - td->control = DMA_COUNT(length) | - DMA_DESC_COF | DMA_DESC_IOF; - /* Move tail */ - lp->tx_chain_tail = chain_next; - /* Write to NDPTR */ - writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]), - &lp->tx_dma_regs->dmandptr); - /* Move head to tail */ - lp->tx_chain_head = lp->tx_chain_tail; - } else { - /* Update tail */ - td->control = DMA_COUNT(length) | - DMA_DESC_COF | DMA_DESC_IOF; - /* Link to prev */ - lp->td_ring[chain_prev].control &= - ~DMA_DESC_COF; - /* Link to prev */ - lp->td_ring[chain_prev].link = CPHYSADDR(td); - /* Move tail */ - lp->tx_chain_tail = chain_next; - /* Write to NDPTR */ - writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]), - &(lp->tx_dma_regs->dmandptr)); - /* Move head to tail */ - lp->tx_chain_head = lp->tx_chain_tail; - lp->tx_chain_status = desc_empty; - } - } else { - if (lp->tx_chain_status == desc_empty) { - /* Update tail */ - td->control = DMA_COUNT(length) | - DMA_DESC_COF | DMA_DESC_IOF; - /* Move tail */ - lp->tx_chain_tail = chain_next; - lp->tx_chain_status = desc_filled; - } else { - /* Update tail */ - td->control = DMA_COUNT(length) | - DMA_DESC_COF | DMA_DESC_IOF; - lp->td_ring[chain_prev].control &= - ~DMA_DESC_COF; - lp->td_ring[chain_prev].link = CPHYSADDR(td); - lp->tx_chain_tail = chain_next; - } - } - dma_cache_wback((u32) td, sizeof(*td)); - - dev->trans_start = jiffies; - spin_unlock_irqrestore(&lp->lock, flags); - - return NETDEV_TX_OK; -} - -static int mdio_read(struct net_device *dev, int mii_id, int reg) -{ - struct korina_private *lp = netdev_priv(dev); - int ret; - - mii_id = ((lp->rx_irq == 0x2c ? 1 : 0) << 8); - - writel(0, &lp->eth_regs->miimcfg); - writel(0, &lp->eth_regs->miimcmd); - writel(mii_id | reg, &lp->eth_regs->miimaddr); - writel(ETH_MII_CMD_SCN, &lp->eth_regs->miimcmd); - - ret = (int)(readl(&lp->eth_regs->miimrdd)); - return ret; -} - -static void mdio_write(struct net_device *dev, int mii_id, int reg, int val) -{ - struct korina_private *lp = netdev_priv(dev); - - mii_id = ((lp->rx_irq == 0x2c ? 1 : 0) << 8); - - writel(0, &lp->eth_regs->miimcfg); - writel(1, &lp->eth_regs->miimcmd); - writel(mii_id | reg, &lp->eth_regs->miimaddr); - writel(ETH_MII_CMD_SCN, &lp->eth_regs->miimcmd); - writel(val, &lp->eth_regs->miimwtd); -} - -/* Ethernet Rx DMA interrupt */ -static irqreturn_t korina_rx_dma_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - struct korina_private *lp = netdev_priv(dev); - u32 dmas, dmasm; - irqreturn_t retval; - - dmas = readl(&lp->rx_dma_regs->dmas); - if (dmas & (DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR)) { - dmasm = readl(&lp->rx_dma_regs->dmasm); - writel(dmasm | (DMA_STAT_DONE | - DMA_STAT_HALT | DMA_STAT_ERR), - &lp->rx_dma_regs->dmasm); - - napi_schedule(&lp->napi); - - if (dmas & DMA_STAT_ERR) - printk(KERN_ERR "%s: DMA error\n", dev->name); - - retval = IRQ_HANDLED; - } else - retval = IRQ_NONE; - - return retval; -} - -static int korina_rx(struct net_device *dev, int limit) -{ - struct korina_private *lp = netdev_priv(dev); - struct dma_desc *rd = &lp->rd_ring[lp->rx_next_done]; - struct sk_buff *skb, *skb_new; - u8 *pkt_buf; - u32 devcs, pkt_len, dmas; - int count; - - dma_cache_inv((u32)rd, sizeof(*rd)); - - for (count = 0; count < limit; count++) { - skb = lp->rx_skb[lp->rx_next_done]; - skb_new = NULL; - - devcs = rd->devcs; - - if ((KORINA_RBSIZE - (u32)DMA_COUNT(rd->control)) == 0) - break; - - /* Update statistics counters */ - if (devcs & ETH_RX_CRC) - dev->stats.rx_crc_errors++; - if (devcs & ETH_RX_LOR) - dev->stats.rx_length_errors++; - if (devcs & ETH_RX_LE) - dev->stats.rx_length_errors++; - if (devcs & ETH_RX_OVR) - dev->stats.rx_fifo_errors++; - if (devcs & ETH_RX_CV) - dev->stats.rx_frame_errors++; - if (devcs & ETH_RX_CES) - dev->stats.rx_length_errors++; - if (devcs & ETH_RX_MP) - dev->stats.multicast++; - - if ((devcs & ETH_RX_LD) != ETH_RX_LD) { - /* check that this is a whole packet - * WARNING: DMA_FD bit incorrectly set - * in Rc32434 (errata ref #077) */ - dev->stats.rx_errors++; - dev->stats.rx_dropped++; - } else if ((devcs & ETH_RX_ROK)) { - pkt_len = RCVPKT_LENGTH(devcs); - - /* must be the (first and) last - * descriptor then */ - pkt_buf = (u8 *)lp->rx_skb[lp->rx_next_done]->data; - - /* invalidate the cache */ - dma_cache_inv((unsigned long)pkt_buf, pkt_len - 4); - - /* Malloc up new buffer. */ - skb_new = netdev_alloc_skb_ip_align(dev, KORINA_RBSIZE); - - if (!skb_new) - break; - /* Do not count the CRC */ - skb_put(skb, pkt_len - 4); - skb->protocol = eth_type_trans(skb, dev); - - /* Pass the packet to upper layers */ - netif_receive_skb(skb); - dev->stats.rx_packets++; - dev->stats.rx_bytes += pkt_len; - - /* Update the mcast stats */ - if (devcs & ETH_RX_MP) - dev->stats.multicast++; - - lp->rx_skb[lp->rx_next_done] = skb_new; - } - - rd->devcs = 0; - - /* Restore descriptor's curr_addr */ - if (skb_new) - rd->ca = CPHYSADDR(skb_new->data); - else - rd->ca = CPHYSADDR(skb->data); - - rd->control = DMA_COUNT(KORINA_RBSIZE) | - DMA_DESC_COD | DMA_DESC_IOD; - lp->rd_ring[(lp->rx_next_done - 1) & - KORINA_RDS_MASK].control &= - ~DMA_DESC_COD; - - lp->rx_next_done = (lp->rx_next_done + 1) & KORINA_RDS_MASK; - dma_cache_wback((u32)rd, sizeof(*rd)); - rd = &lp->rd_ring[lp->rx_next_done]; - writel(~DMA_STAT_DONE, &lp->rx_dma_regs->dmas); - } - - dmas = readl(&lp->rx_dma_regs->dmas); - - if (dmas & DMA_STAT_HALT) { - writel(~(DMA_STAT_HALT | DMA_STAT_ERR), - &lp->rx_dma_regs->dmas); - - lp->dma_halt_cnt++; - rd->devcs = 0; - skb = lp->rx_skb[lp->rx_next_done]; - rd->ca = CPHYSADDR(skb->data); - dma_cache_wback((u32)rd, sizeof(*rd)); - korina_chain_rx(lp, rd); - } - - return count; -} - -static int korina_poll(struct napi_struct *napi, int budget) -{ - struct korina_private *lp = - container_of(napi, struct korina_private, napi); - struct net_device *dev = lp->dev; - int work_done; - - work_done = korina_rx(dev, budget); - if (work_done < budget) { - napi_complete(napi); - - writel(readl(&lp->rx_dma_regs->dmasm) & - ~(DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR), - &lp->rx_dma_regs->dmasm); - } - return work_done; -} - -/* - * Set or clear the multicast filter for this adaptor. - */ -static void korina_multicast_list(struct net_device *dev) -{ - struct korina_private *lp = netdev_priv(dev); - unsigned long flags; - struct netdev_hw_addr *ha; - u32 recognise = ETH_ARC_AB; /* always accept broadcasts */ - int i; - - /* Set promiscuous mode */ - if (dev->flags & IFF_PROMISC) - recognise |= ETH_ARC_PRO; - - else if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 4)) - /* All multicast and broadcast */ - recognise |= ETH_ARC_AM; - - /* Build the hash table */ - if (netdev_mc_count(dev) > 4) { - u16 hash_table[4]; - u32 crc; - - for (i = 0; i < 4; i++) - hash_table[i] = 0; - - netdev_for_each_mc_addr(ha, dev) { - crc = ether_crc_le(6, ha->addr); - crc >>= 26; - hash_table[crc >> 4] |= 1 << (15 - (crc & 0xf)); - } - /* Accept filtered multicast */ - recognise |= ETH_ARC_AFM; - - /* Fill the MAC hash tables with their values */ - writel((u32)(hash_table[1] << 16 | hash_table[0]), - &lp->eth_regs->ethhash0); - writel((u32)(hash_table[3] << 16 | hash_table[2]), - &lp->eth_regs->ethhash1); - } - - spin_lock_irqsave(&lp->lock, flags); - writel(recognise, &lp->eth_regs->etharc); - spin_unlock_irqrestore(&lp->lock, flags); -} - -static void korina_tx(struct net_device *dev) -{ - struct korina_private *lp = netdev_priv(dev); - struct dma_desc *td = &lp->td_ring[lp->tx_next_done]; - u32 devcs; - u32 dmas; - - spin_lock(&lp->lock); - - /* Process all desc that are done */ - while (IS_DMA_FINISHED(td->control)) { - if (lp->tx_full == 1) { - netif_wake_queue(dev); - lp->tx_full = 0; - } - - devcs = lp->td_ring[lp->tx_next_done].devcs; - if ((devcs & (ETH_TX_FD | ETH_TX_LD)) != - (ETH_TX_FD | ETH_TX_LD)) { - dev->stats.tx_errors++; - dev->stats.tx_dropped++; - - /* Should never happen */ - printk(KERN_ERR "%s: split tx ignored\n", - dev->name); - } else if (devcs & ETH_TX_TOK) { - dev->stats.tx_packets++; - dev->stats.tx_bytes += - lp->tx_skb[lp->tx_next_done]->len; - } else { - dev->stats.tx_errors++; - dev->stats.tx_dropped++; - - /* Underflow */ - if (devcs & ETH_TX_UND) - dev->stats.tx_fifo_errors++; - - /* Oversized frame */ - if (devcs & ETH_TX_OF) - dev->stats.tx_aborted_errors++; - - /* Excessive deferrals */ - if (devcs & ETH_TX_ED) - dev->stats.tx_carrier_errors++; - - /* Collisions: medium busy */ - if (devcs & ETH_TX_EC) - dev->stats.collisions++; - - /* Late collision */ - if (devcs & ETH_TX_LC) - dev->stats.tx_window_errors++; - } - - /* We must always free the original skb */ - if (lp->tx_skb[lp->tx_next_done]) { - dev_kfree_skb_any(lp->tx_skb[lp->tx_next_done]); - lp->tx_skb[lp->tx_next_done] = NULL; - } - - lp->td_ring[lp->tx_next_done].control = DMA_DESC_IOF; - lp->td_ring[lp->tx_next_done].devcs = ETH_TX_FD | ETH_TX_LD; - lp->td_ring[lp->tx_next_done].link = 0; - lp->td_ring[lp->tx_next_done].ca = 0; - lp->tx_count--; - - /* Go on to next transmission */ - lp->tx_next_done = (lp->tx_next_done + 1) & KORINA_TDS_MASK; - td = &lp->td_ring[lp->tx_next_done]; - - } - - /* Clear the DMA status register */ - dmas = readl(&lp->tx_dma_regs->dmas); - writel(~dmas, &lp->tx_dma_regs->dmas); - - writel(readl(&lp->tx_dma_regs->dmasm) & - ~(DMA_STAT_FINI | DMA_STAT_ERR), - &lp->tx_dma_regs->dmasm); - - spin_unlock(&lp->lock); -} - -static irqreturn_t -korina_tx_dma_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - struct korina_private *lp = netdev_priv(dev); - u32 dmas, dmasm; - irqreturn_t retval; - - dmas = readl(&lp->tx_dma_regs->dmas); - - if (dmas & (DMA_STAT_FINI | DMA_STAT_ERR)) { - dmasm = readl(&lp->tx_dma_regs->dmasm); - writel(dmasm | (DMA_STAT_FINI | DMA_STAT_ERR), - &lp->tx_dma_regs->dmasm); - - korina_tx(dev); - - if (lp->tx_chain_status == desc_filled && - (readl(&(lp->tx_dma_regs->dmandptr)) == 0)) { - writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]), - &(lp->tx_dma_regs->dmandptr)); - lp->tx_chain_status = desc_empty; - lp->tx_chain_head = lp->tx_chain_tail; - dev->trans_start = jiffies; - } - if (dmas & DMA_STAT_ERR) - printk(KERN_ERR "%s: DMA error\n", dev->name); - - retval = IRQ_HANDLED; - } else - retval = IRQ_NONE; - - return retval; -} - - -static void korina_check_media(struct net_device *dev, unsigned int init_media) -{ - struct korina_private *lp = netdev_priv(dev); - - mii_check_media(&lp->mii_if, 0, init_media); - - if (lp->mii_if.full_duplex) - writel(readl(&lp->eth_regs->ethmac2) | ETH_MAC2_FD, - &lp->eth_regs->ethmac2); - else - writel(readl(&lp->eth_regs->ethmac2) & ~ETH_MAC2_FD, - &lp->eth_regs->ethmac2); -} - -static void korina_poll_media(unsigned long data) -{ - struct net_device *dev = (struct net_device *) data; - struct korina_private *lp = netdev_priv(dev); - - korina_check_media(dev, 0); - mod_timer(&lp->media_check_timer, jiffies + HZ); -} - -static void korina_set_carrier(struct mii_if_info *mii) -{ - if (mii->force_media) { - /* autoneg is off: Link is always assumed to be up */ - if (!netif_carrier_ok(mii->dev)) - netif_carrier_on(mii->dev); - } else /* Let MMI library update carrier status */ - korina_check_media(mii->dev, 0); -} - -static int korina_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) -{ - struct korina_private *lp = netdev_priv(dev); - struct mii_ioctl_data *data = if_mii(rq); - int rc; - - if (!netif_running(dev)) - return -EINVAL; - spin_lock_irq(&lp->lock); - rc = generic_mii_ioctl(&lp->mii_if, data, cmd, NULL); - spin_unlock_irq(&lp->lock); - korina_set_carrier(&lp->mii_if); - - return rc; -} - -/* ethtool helpers */ -static void netdev_get_drvinfo(struct net_device *dev, - struct ethtool_drvinfo *info) -{ - struct korina_private *lp = netdev_priv(dev); - - strcpy(info->driver, DRV_NAME); - strcpy(info->version, DRV_VERSION); - strcpy(info->bus_info, lp->dev->name); -} - -static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) -{ - struct korina_private *lp = netdev_priv(dev); - int rc; - - spin_lock_irq(&lp->lock); - rc = mii_ethtool_gset(&lp->mii_if, cmd); - spin_unlock_irq(&lp->lock); - - return rc; -} - -static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) -{ - struct korina_private *lp = netdev_priv(dev); - int rc; - - spin_lock_irq(&lp->lock); - rc = mii_ethtool_sset(&lp->mii_if, cmd); - spin_unlock_irq(&lp->lock); - korina_set_carrier(&lp->mii_if); - - return rc; -} - -static u32 netdev_get_link(struct net_device *dev) -{ - struct korina_private *lp = netdev_priv(dev); - - return mii_link_ok(&lp->mii_if); -} - -static const struct ethtool_ops netdev_ethtool_ops = { - .get_drvinfo = netdev_get_drvinfo, - .get_settings = netdev_get_settings, - .set_settings = netdev_set_settings, - .get_link = netdev_get_link, -}; - -static int korina_alloc_ring(struct net_device *dev) -{ - struct korina_private *lp = netdev_priv(dev); - struct sk_buff *skb; - int i; - - /* Initialize the transmit descriptors */ - for (i = 0; i < KORINA_NUM_TDS; i++) { - lp->td_ring[i].control = DMA_DESC_IOF; - lp->td_ring[i].devcs = ETH_TX_FD | ETH_TX_LD; - lp->td_ring[i].ca = 0; - lp->td_ring[i].link = 0; - } - lp->tx_next_done = lp->tx_chain_head = lp->tx_chain_tail = - lp->tx_full = lp->tx_count = 0; - lp->tx_chain_status = desc_empty; - - /* Initialize the receive descriptors */ - for (i = 0; i < KORINA_NUM_RDS; i++) { - skb = netdev_alloc_skb_ip_align(dev, KORINA_RBSIZE); - if (!skb) - return -ENOMEM; - lp->rx_skb[i] = skb; - lp->rd_ring[i].control = DMA_DESC_IOD | - DMA_COUNT(KORINA_RBSIZE); - lp->rd_ring[i].devcs = 0; - lp->rd_ring[i].ca = CPHYSADDR(skb->data); - lp->rd_ring[i].link = CPHYSADDR(&lp->rd_ring[i+1]); - } - - /* loop back receive descriptors, so the last - * descriptor points to the first one */ - lp->rd_ring[i - 1].link = CPHYSADDR(&lp->rd_ring[0]); - lp->rd_ring[i - 1].control |= DMA_DESC_COD; - - lp->rx_next_done = 0; - lp->rx_chain_head = 0; - lp->rx_chain_tail = 0; - lp->rx_chain_status = desc_empty; - - return 0; -} - -static void korina_free_ring(struct net_device *dev) -{ - struct korina_private *lp = netdev_priv(dev); - int i; - - for (i = 0; i < KORINA_NUM_RDS; i++) { - lp->rd_ring[i].control = 0; - if (lp->rx_skb[i]) - dev_kfree_skb_any(lp->rx_skb[i]); - lp->rx_skb[i] = NULL; - } - - for (i = 0; i < KORINA_NUM_TDS; i++) { - lp->td_ring[i].control = 0; - if (lp->tx_skb[i]) - dev_kfree_skb_any(lp->tx_skb[i]); - lp->tx_skb[i] = NULL; - } -} - -/* - * Initialize the RC32434 ethernet controller. - */ -static int korina_init(struct net_device *dev) -{ - struct korina_private *lp = netdev_priv(dev); - - /* Disable DMA */ - korina_abort_tx(dev); - korina_abort_rx(dev); - - /* reset ethernet logic */ - writel(0, &lp->eth_regs->ethintfc); - while ((readl(&lp->eth_regs->ethintfc) & ETH_INT_FC_RIP)) - dev->trans_start = jiffies; - - /* Enable Ethernet Interface */ - writel(ETH_INT_FC_EN, &lp->eth_regs->ethintfc); - - /* Allocate rings */ - if (korina_alloc_ring(dev)) { - printk(KERN_ERR "%s: descriptor allocation failed\n", dev->name); - korina_free_ring(dev); - return -ENOMEM; - } - - writel(0, &lp->rx_dma_regs->dmas); - /* Start Rx DMA */ - korina_start_rx(lp, &lp->rd_ring[0]); - - writel(readl(&lp->tx_dma_regs->dmasm) & - ~(DMA_STAT_FINI | DMA_STAT_ERR), - &lp->tx_dma_regs->dmasm); - writel(readl(&lp->rx_dma_regs->dmasm) & - ~(DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR), - &lp->rx_dma_regs->dmasm); - - /* Accept only packets destined for this Ethernet device address */ - writel(ETH_ARC_AB, &lp->eth_regs->etharc); - - /* Set all Ether station address registers to their initial values */ - writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal0); - writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah0); - - writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal1); - writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah1); - - writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal2); - writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah2); - - writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal3); - writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah3); - - - /* Frame Length Checking, Pad Enable, CRC Enable, Full Duplex set */ - writel(ETH_MAC2_PE | ETH_MAC2_CEN | ETH_MAC2_FD, - &lp->eth_regs->ethmac2); - - /* Back to back inter-packet-gap */ - writel(0x15, &lp->eth_regs->ethipgt); - /* Non - Back to back inter-packet-gap */ - writel(0x12, &lp->eth_regs->ethipgr); - - /* Management Clock Prescaler Divisor - * Clock independent setting */ - writel(((idt_cpu_freq) / MII_CLOCK + 1) & ~1, - &lp->eth_regs->ethmcp); - - /* don't transmit until fifo contains 48b */ - writel(48, &lp->eth_regs->ethfifott); - - writel(ETH_MAC1_RE, &lp->eth_regs->ethmac1); - - napi_enable(&lp->napi); - netif_start_queue(dev); - - return 0; -} - -/* - * Restart the RC32434 ethernet controller. - */ -static void korina_restart_task(struct work_struct *work) -{ - struct korina_private *lp = container_of(work, - struct korina_private, restart_task); - struct net_device *dev = lp->dev; - - /* - * Disable interrupts - */ - disable_irq(lp->rx_irq); - disable_irq(lp->tx_irq); - disable_irq(lp->ovr_irq); - disable_irq(lp->und_irq); - - writel(readl(&lp->tx_dma_regs->dmasm) | - DMA_STAT_FINI | DMA_STAT_ERR, - &lp->tx_dma_regs->dmasm); - writel(readl(&lp->rx_dma_regs->dmasm) | - DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR, - &lp->rx_dma_regs->dmasm); - - korina_free_ring(dev); - - napi_disable(&lp->napi); - - if (korina_init(dev) < 0) { - printk(KERN_ERR "%s: cannot restart device\n", dev->name); - return; - } - korina_multicast_list(dev); - - enable_irq(lp->und_irq); - enable_irq(lp->ovr_irq); - enable_irq(lp->tx_irq); - enable_irq(lp->rx_irq); -} - -static void korina_clear_and_restart(struct net_device *dev, u32 value) -{ - struct korina_private *lp = netdev_priv(dev); - - netif_stop_queue(dev); - writel(value, &lp->eth_regs->ethintfc); - schedule_work(&lp->restart_task); -} - -/* Ethernet Tx Underflow interrupt */ -static irqreturn_t korina_und_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - struct korina_private *lp = netdev_priv(dev); - unsigned int und; - - spin_lock(&lp->lock); - - und = readl(&lp->eth_regs->ethintfc); - - if (und & ETH_INT_FC_UND) - korina_clear_and_restart(dev, und & ~ETH_INT_FC_UND); - - spin_unlock(&lp->lock); - - return IRQ_HANDLED; -} - -static void korina_tx_timeout(struct net_device *dev) -{ - struct korina_private *lp = netdev_priv(dev); - - schedule_work(&lp->restart_task); -} - -/* Ethernet Rx Overflow interrupt */ -static irqreturn_t -korina_ovr_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - struct korina_private *lp = netdev_priv(dev); - unsigned int ovr; - - spin_lock(&lp->lock); - ovr = readl(&lp->eth_regs->ethintfc); - - if (ovr & ETH_INT_FC_OVR) - korina_clear_and_restart(dev, ovr & ~ETH_INT_FC_OVR); - - spin_unlock(&lp->lock); - - return IRQ_HANDLED; -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -static void korina_poll_controller(struct net_device *dev) -{ - disable_irq(dev->irq); - korina_tx_dma_interrupt(dev->irq, dev); - enable_irq(dev->irq); -} -#endif - -static int korina_open(struct net_device *dev) -{ - struct korina_private *lp = netdev_priv(dev); - int ret; - - /* Initialize */ - ret = korina_init(dev); - if (ret < 0) { - printk(KERN_ERR "%s: cannot open device\n", dev->name); - goto out; - } - - /* Install the interrupt handler - * that handles the Done Finished - * Ovr and Und Events */ - ret = request_irq(lp->rx_irq, korina_rx_dma_interrupt, - IRQF_DISABLED, "Korina ethernet Rx", dev); - if (ret < 0) { - printk(KERN_ERR "%s: unable to get Rx DMA IRQ %d\n", - dev->name, lp->rx_irq); - goto err_release; - } - ret = request_irq(lp->tx_irq, korina_tx_dma_interrupt, - IRQF_DISABLED, "Korina ethernet Tx", dev); - if (ret < 0) { - printk(KERN_ERR "%s: unable to get Tx DMA IRQ %d\n", - dev->name, lp->tx_irq); - goto err_free_rx_irq; - } - - /* Install handler for overrun error. */ - ret = request_irq(lp->ovr_irq, korina_ovr_interrupt, - IRQF_DISABLED, "Ethernet Overflow", dev); - if (ret < 0) { - printk(KERN_ERR "%s: unable to get OVR IRQ %d\n", - dev->name, lp->ovr_irq); - goto err_free_tx_irq; - } - - /* Install handler for underflow error. */ - ret = request_irq(lp->und_irq, korina_und_interrupt, - IRQF_DISABLED, "Ethernet Underflow", dev); - if (ret < 0) { - printk(KERN_ERR "%s: unable to get UND IRQ %d\n", - dev->name, lp->und_irq); - goto err_free_ovr_irq; - } - mod_timer(&lp->media_check_timer, jiffies + 1); -out: - return ret; - -err_free_ovr_irq: - free_irq(lp->ovr_irq, dev); -err_free_tx_irq: - free_irq(lp->tx_irq, dev); -err_free_rx_irq: - free_irq(lp->rx_irq, dev); -err_release: - korina_free_ring(dev); - goto out; -} - -static int korina_close(struct net_device *dev) -{ - struct korina_private *lp = netdev_priv(dev); - u32 tmp; - - del_timer(&lp->media_check_timer); - - /* Disable interrupts */ - disable_irq(lp->rx_irq); - disable_irq(lp->tx_irq); - disable_irq(lp->ovr_irq); - disable_irq(lp->und_irq); - - korina_abort_tx(dev); - tmp = readl(&lp->tx_dma_regs->dmasm); - tmp = tmp | DMA_STAT_FINI | DMA_STAT_ERR; - writel(tmp, &lp->tx_dma_regs->dmasm); - - korina_abort_rx(dev); - tmp = readl(&lp->rx_dma_regs->dmasm); - tmp = tmp | DMA_STAT_DONE | DMA_STAT_HALT | DMA_STAT_ERR; - writel(tmp, &lp->rx_dma_regs->dmasm); - - korina_free_ring(dev); - - napi_disable(&lp->napi); - - cancel_work_sync(&lp->restart_task); - - free_irq(lp->rx_irq, dev); - free_irq(lp->tx_irq, dev); - free_irq(lp->ovr_irq, dev); - free_irq(lp->und_irq, dev); - - return 0; -} - -static const struct net_device_ops korina_netdev_ops = { - .ndo_open = korina_open, - .ndo_stop = korina_close, - .ndo_start_xmit = korina_send_packet, - .ndo_set_multicast_list = korina_multicast_list, - .ndo_tx_timeout = korina_tx_timeout, - .ndo_do_ioctl = korina_ioctl, - .ndo_change_mtu = eth_change_mtu, - .ndo_validate_addr = eth_validate_addr, - .ndo_set_mac_address = eth_mac_addr, -#ifdef CONFIG_NET_POLL_CONTROLLER - .ndo_poll_controller = korina_poll_controller, -#endif -}; - -static int korina_probe(struct platform_device *pdev) -{ - struct korina_device *bif = platform_get_drvdata(pdev); - struct korina_private *lp; - struct net_device *dev; - struct resource *r; - int rc; - - dev = alloc_etherdev(sizeof(struct korina_private)); - if (!dev) { - printk(KERN_ERR DRV_NAME ": alloc_etherdev failed\n"); - return -ENOMEM; - } - SET_NETDEV_DEV(dev, &pdev->dev); - lp = netdev_priv(dev); - - bif->dev = dev; - memcpy(dev->dev_addr, bif->mac, 6); - - lp->rx_irq = platform_get_irq_byname(pdev, "korina_rx"); - lp->tx_irq = platform_get_irq_byname(pdev, "korina_tx"); - lp->ovr_irq = platform_get_irq_byname(pdev, "korina_ovr"); - lp->und_irq = platform_get_irq_byname(pdev, "korina_und"); - - r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_regs"); - dev->base_addr = r->start; - lp->eth_regs = ioremap_nocache(r->start, resource_size(r)); - if (!lp->eth_regs) { - printk(KERN_ERR DRV_NAME ": cannot remap registers\n"); - rc = -ENXIO; - goto probe_err_out; - } - - r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_rx"); - lp->rx_dma_regs = ioremap_nocache(r->start, resource_size(r)); - if (!lp->rx_dma_regs) { - printk(KERN_ERR DRV_NAME ": cannot remap Rx DMA registers\n"); - rc = -ENXIO; - goto probe_err_dma_rx; - } - - r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_tx"); - lp->tx_dma_regs = ioremap_nocache(r->start, resource_size(r)); - if (!lp->tx_dma_regs) { - printk(KERN_ERR DRV_NAME ": cannot remap Tx DMA registers\n"); - rc = -ENXIO; - goto probe_err_dma_tx; - } - - lp->td_ring = kmalloc(TD_RING_SIZE + RD_RING_SIZE, GFP_KERNEL); - if (!lp->td_ring) { - printk(KERN_ERR DRV_NAME ": cannot allocate descriptors\n"); - rc = -ENXIO; - goto probe_err_td_ring; - } - - dma_cache_inv((unsigned long)(lp->td_ring), - TD_RING_SIZE + RD_RING_SIZE); - - /* now convert TD_RING pointer to KSEG1 */ - lp->td_ring = (struct dma_desc *)KSEG1ADDR(lp->td_ring); - lp->rd_ring = &lp->td_ring[KORINA_NUM_TDS]; - - spin_lock_init(&lp->lock); - /* just use the rx dma irq */ - dev->irq = lp->rx_irq; - lp->dev = dev; - - dev->netdev_ops = &korina_netdev_ops; - dev->ethtool_ops = &netdev_ethtool_ops; - dev->watchdog_timeo = TX_TIMEOUT; - netif_napi_add(dev, &lp->napi, korina_poll, 64); - - lp->phy_addr = (((lp->rx_irq == 0x2c? 1:0) << 8) | 0x05); - lp->mii_if.dev = dev; - lp->mii_if.mdio_read = mdio_read; - lp->mii_if.mdio_write = mdio_write; - lp->mii_if.phy_id = lp->phy_addr; - lp->mii_if.phy_id_mask = 0x1f; - lp->mii_if.reg_num_mask = 0x1f; - - rc = register_netdev(dev); - if (rc < 0) { - printk(KERN_ERR DRV_NAME - ": cannot register net device: %d\n", rc); - goto probe_err_register; - } - setup_timer(&lp->media_check_timer, korina_poll_media, (unsigned long) dev); - - INIT_WORK(&lp->restart_task, korina_restart_task); - - printk(KERN_INFO "%s: " DRV_NAME "-" DRV_VERSION " " DRV_RELDATE "\n", - dev->name); -out: - return rc; - -probe_err_register: - kfree(lp->td_ring); -probe_err_td_ring: - iounmap(lp->tx_dma_regs); -probe_err_dma_tx: - iounmap(lp->rx_dma_regs); -probe_err_dma_rx: - iounmap(lp->eth_regs); -probe_err_out: - free_netdev(dev); - goto out; -} - -static int korina_remove(struct platform_device *pdev) -{ - struct korina_device *bif = platform_get_drvdata(pdev); - struct korina_private *lp = netdev_priv(bif->dev); - - iounmap(lp->eth_regs); - iounmap(lp->rx_dma_regs); - iounmap(lp->tx_dma_regs); - - platform_set_drvdata(pdev, NULL); - unregister_netdev(bif->dev); - free_netdev(bif->dev); - - return 0; -} - -static struct platform_driver korina_driver = { - .driver.name = "korina", - .probe = korina_probe, - .remove = korina_remove, -}; - -static int __init korina_init_module(void) -{ - return platform_driver_register(&korina_driver); -} - -static void korina_cleanup_module(void) -{ - return platform_driver_unregister(&korina_driver); -} - -module_init(korina_init_module); -module_exit(korina_cleanup_module); - -MODULE_AUTHOR("Philip Rischel <rischelp@idt.com>"); -MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>"); -MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>"); -MODULE_DESCRIPTION("IDT RC32434 (Korina) Ethernet driver"); -MODULE_LICENSE("GPL"); |