diff options
Diffstat (limited to 'target/linux/ar7/files/drivers/net/cpmac.c')
| -rw-r--r-- | target/linux/ar7/files/drivers/net/cpmac.c | 1293 |
1 files changed, 0 insertions, 1293 deletions
diff --git a/target/linux/ar7/files/drivers/net/cpmac.c b/target/linux/ar7/files/drivers/net/cpmac.c deleted file mode 100644 index 4b6bfe1be6..0000000000 --- a/target/linux/ar7/files/drivers/net/cpmac.c +++ /dev/null @@ -1,1293 +0,0 @@ -/* - * Copyright (C) 2006, 2007 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 program is distributed in the hope that 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 - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/moduleparam.h> - -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/errno.h> -#include <linux/types.h> -#include <linux/delay.h> -#include <linux/version.h> - -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/ethtool.h> -#include <linux/skbuff.h> -#include <linux/mii.h> -#include <linux/phy.h> -#include <linux/platform_device.h> -#include <linux/dma-mapping.h> -#include <asm/gpio.h> -#include <asm/atomic.h> - -MODULE_AUTHOR("Eugene Konev <ejka@imfi.kspu.ru>"); -MODULE_DESCRIPTION("TI AR7 ethernet driver (CPMAC)"); -MODULE_LICENSE("GPL"); - -static int debug_level = 8; -static int dumb_switch; - -/* Next 2 are only used in cpmac_probe, so it's pointless to change them */ -module_param(debug_level, int, 0444); -module_param(dumb_switch, int, 0444); - -MODULE_PARM_DESC(debug_level, "Number of NETIF_MSG bits to enable"); -MODULE_PARM_DESC(dumb_switch, "Assume switch is not connected to MDIO bus"); - -#define CPMAC_VERSION "0.5.0" -/* stolen from net/ieee80211.h */ -#ifndef MAC_FMT -#define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x" -#define MAC_ARG(x) ((u8*)(x))[0], ((u8*)(x))[1], ((u8*)(x))[2], \ - ((u8*)(x))[3], ((u8*)(x))[4], ((u8*)(x))[5] -#endif -/* frame size + 802.1q tag */ -#define CPMAC_SKB_SIZE (ETH_FRAME_LEN + 4) -#define CPMAC_QUEUES 8 - -/* Ethernet registers */ -#define CPMAC_TX_CONTROL 0x0004 -#define CPMAC_TX_TEARDOWN 0x0008 -#define CPMAC_RX_CONTROL 0x0014 -#define CPMAC_RX_TEARDOWN 0x0018 -#define CPMAC_MBP 0x0100 -# define MBP_RXPASSCRC 0x40000000 -# define MBP_RXQOS 0x20000000 -# define MBP_RXNOCHAIN 0x10000000 -# define MBP_RXCMF 0x01000000 -# define MBP_RXSHORT 0x00800000 -# define MBP_RXCEF 0x00400000 -# define MBP_RXPROMISC 0x00200000 -# define MBP_PROMISCCHAN(channel) (((channel) & 0x7) << 16) -# define MBP_RXBCAST 0x00002000 -# define MBP_BCASTCHAN(channel) (((channel) & 0x7) << 8) -# define MBP_RXMCAST 0x00000020 -# define MBP_MCASTCHAN(channel) ((channel) & 0x7) -#define CPMAC_UNICAST_ENABLE 0x0104 -#define CPMAC_UNICAST_CLEAR 0x0108 -#define CPMAC_MAX_LENGTH 0x010c -#define CPMAC_BUFFER_OFFSET 0x0110 -#define CPMAC_MAC_CONTROL 0x0160 -# define MAC_TXPTYPE 0x00000200 -# define MAC_TXPACE 0x00000040 -# define MAC_MII 0x00000020 -# define MAC_TXFLOW 0x00000010 -# define MAC_RXFLOW 0x00000008 -# define MAC_MTEST 0x00000004 -# define MAC_LOOPBACK 0x00000002 -# define MAC_FDX 0x00000001 -#define CPMAC_MAC_STATUS 0x0164 -# define MAC_STATUS_QOS 0x00000004 -# define MAC_STATUS_RXFLOW 0x00000002 -# define MAC_STATUS_TXFLOW 0x00000001 -#define CPMAC_TX_INT_ENABLE 0x0178 -#define CPMAC_TX_INT_CLEAR 0x017c -#define CPMAC_MAC_INT_VECTOR 0x0180 -# define MAC_INT_STATUS 0x00080000 -# define MAC_INT_HOST 0x00040000 -# define MAC_INT_RX 0x00020000 -# define MAC_INT_TX 0x00010000 -#define CPMAC_MAC_EOI_VECTOR 0x0184 -#define CPMAC_RX_INT_ENABLE 0x0198 -#define CPMAC_RX_INT_CLEAR 0x019c -#define CPMAC_MAC_INT_ENABLE 0x01a8 -#define CPMAC_MAC_INT_CLEAR 0x01ac -#define CPMAC_MAC_ADDR_LO(channel) (0x01b0 + (channel) * 4) -#define CPMAC_MAC_ADDR_MID 0x01d0 -#define CPMAC_MAC_ADDR_HI 0x01d4 -#define CPMAC_MAC_HASH_LO 0x01d8 -#define CPMAC_MAC_HASH_HI 0x01dc -#define CPMAC_TX_PTR(channel) (0x0600 + (channel) * 4) -#define CPMAC_RX_PTR(channel) (0x0620 + (channel) * 4) -#define CPMAC_TX_ACK(channel) (0x0640 + (channel) * 4) -#define CPMAC_RX_ACK(channel) (0x0660 + (channel) * 4) -#define CPMAC_REG_END 0x0680 -/* - * Rx/Tx statistics - * TODO: use some of them to fill stats in cpmac_stats() - */ -#define CPMAC_STATS_RX_GOOD 0x0200 -#define CPMAC_STATS_RX_BCAST 0x0204 -#define CPMAC_STATS_RX_MCAST 0x0208 -#define CPMAC_STATS_RX_PAUSE 0x020c -#define CPMAC_STATS_RX_CRC 0x0210 -#define CPMAC_STATS_RX_ALIGN 0x0214 -#define CPMAC_STATS_RX_OVER 0x0218 -#define CPMAC_STATS_RX_JABBER 0x021c -#define CPMAC_STATS_RX_UNDER 0x0220 -#define CPMAC_STATS_RX_FRAG 0x0224 -#define CPMAC_STATS_RX_FILTER 0x0228 -#define CPMAC_STATS_RX_QOSFILTER 0x022c -#define CPMAC_STATS_RX_OCTETS 0x0230 - -#define CPMAC_STATS_TX_GOOD 0x0234 -#define CPMAC_STATS_TX_BCAST 0x0238 -#define CPMAC_STATS_TX_MCAST 0x023c -#define CPMAC_STATS_TX_PAUSE 0x0240 -#define CPMAC_STATS_TX_DEFER 0x0244 -#define CPMAC_STATS_TX_COLLISION 0x0248 -#define CPMAC_STATS_TX_SINGLECOLL 0x024c -#define CPMAC_STATS_TX_MULTICOLL 0x0250 -#define CPMAC_STATS_TX_EXCESSCOLL 0x0254 -#define CPMAC_STATS_TX_LATECOLL 0x0258 -#define CPMAC_STATS_TX_UNDERRUN 0x025c -#define CPMAC_STATS_TX_CARRIERSENSE 0x0260 -#define CPMAC_STATS_TX_OCTETS 0x0264 - -#define cpmac_read(base, reg) (readl((void __iomem *)(base) + (reg))) -#define cpmac_write(base, reg, val) (writel(val, (void __iomem *)(base) + \ - (reg))) - -/* MDIO bus */ -#define CPMAC_MDIO_VERSION 0x0000 -#define CPMAC_MDIO_CONTROL 0x0004 -# define MDIOC_IDLE 0x80000000 -# define MDIOC_ENABLE 0x40000000 -# define MDIOC_PREAMBLE 0x00100000 -# define MDIOC_FAULT 0x00080000 -# define MDIOC_FAULTDETECT 0x00040000 -# define MDIOC_INTTEST 0x00020000 -# define MDIOC_CLKDIV(div) ((div) & 0xff) -#define CPMAC_MDIO_ALIVE 0x0008 -#define CPMAC_MDIO_LINK 0x000c -#define CPMAC_MDIO_ACCESS(channel) (0x0080 + (channel) * 8) -# define MDIO_BUSY 0x80000000 -# define MDIO_WRITE 0x40000000 -# define MDIO_REG(reg) (((reg) & 0x1f) << 21) -# define MDIO_PHY(phy) (((phy) & 0x1f) << 16) -# define MDIO_DATA(data) ((data) & 0xffff) -#define CPMAC_MDIO_PHYSEL(channel) (0x0084 + (channel) * 8) -# define PHYSEL_LINKSEL 0x00000040 -# define PHYSEL_LINKINT 0x00000020 - -struct cpmac_desc { - u32 hw_next; - u32 hw_data; - u16 buflen; - u16 bufflags; - u16 datalen; - u16 dataflags; -#define CPMAC_SOP 0x8000 -#define CPMAC_EOP 0x4000 -#define CPMAC_OWN 0x2000 -#define CPMAC_EOQ 0x1000 - struct sk_buff *skb; - struct cpmac_desc *next; - struct cpmac_desc *prev; - dma_addr_t mapping; - dma_addr_t data_mapping; -}; - -struct cpmac_priv { - spinlock_t lock; - spinlock_t rx_lock; - struct cpmac_desc *rx_head; - int ring_size; - struct cpmac_desc *desc_ring; - dma_addr_t dma_ring; - void __iomem *regs; - struct mii_bus *mii_bus; - struct phy_device *phy; - char phy_name[BUS_ID_SIZE]; - int oldlink, oldspeed, oldduplex; - u32 msg_enable; - struct net_device *dev; - struct work_struct reset_work; - struct platform_device *pdev; - atomic_t reset_pending; -}; - -static irqreturn_t cpmac_irq(int, void *); -static void cpmac_hw_start(struct net_device *dev); -static void cpmac_hw_stop(struct net_device *dev); -static int cpmac_stop(struct net_device *dev); -static int cpmac_open(struct net_device *dev); - -static void cpmac_dump_regs(struct net_device *dev) -{ - int i; - struct cpmac_priv *priv = netdev_priv(dev); - for (i = 0; i < CPMAC_REG_END; i += 4) { - if (i % 16 == 0) { - if (i) - printk("\n"); - printk(KERN_DEBUG "%s: reg[%p]:", dev->name, - priv->regs + i); - } - printk(" %08x", cpmac_read(priv->regs, i)); - } - printk("\n"); -} - -static void cpmac_dump_desc(struct net_device *dev, struct cpmac_desc *desc) -{ - int i; - printk(KERN_DEBUG "%s: desc[%p]:", dev->name, desc); - for (i = 0; i < sizeof(*desc) / 4; i++) - printk(" %08x", ((u32 *)desc)[i]); - printk("\n"); -} - -static void cpmac_dump_all_desc(struct net_device *dev) -{ - struct cpmac_priv *priv = netdev_priv(dev); - struct cpmac_desc *dump = priv->rx_head; - do { - cpmac_dump_desc(dev, dump); - dump = dump->next; - } while (dump != priv->rx_head); -} - -static void cpmac_dump_skb(struct net_device *dev, struct sk_buff *skb) -{ - int i; - printk(KERN_DEBUG "%s: skb 0x%p, len=%d\n", dev->name, skb, skb->len); - for (i = 0; i < skb->len; i++) { - if (i % 16 == 0) { - if (i) - printk("\n"); - printk(KERN_DEBUG "%s: data[%p]:", dev->name, - skb->data + i); - } - printk(" %02x", ((u8 *)skb->data)[i]); - } - printk("\n"); -} - -static int cpmac_mdio_read(struct mii_bus *bus, int phy_id, int reg) -{ - u32 val; - - while (cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0)) & MDIO_BUSY) - cpu_relax(); - cpmac_write(bus->priv, CPMAC_MDIO_ACCESS(0), MDIO_BUSY | MDIO_REG(reg) | - MDIO_PHY(phy_id)); - while ((val = cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0))) & MDIO_BUSY) - cpu_relax(); - return MDIO_DATA(val); -} - -static int cpmac_mdio_write(struct mii_bus *bus, int phy_id, - int reg, u16 val) -{ - while (cpmac_read(bus->priv, CPMAC_MDIO_ACCESS(0)) & MDIO_BUSY) - cpu_relax(); - cpmac_write(bus->priv, CPMAC_MDIO_ACCESS(0), MDIO_BUSY | MDIO_WRITE | - MDIO_REG(reg) | MDIO_PHY(phy_id) | MDIO_DATA(val)); - return 0; -} - -static int cpmac_mdio_reset(struct mii_bus *bus) -{ - ar7_device_reset(AR7_RESET_BIT_MDIO); - cpmac_write(bus->priv, CPMAC_MDIO_CONTROL, MDIOC_ENABLE | - MDIOC_CLKDIV(ar7_cpmac_freq() / 2200000 - 1)); - return 0; -} - -static int mii_irqs[PHY_MAX_ADDR] = { PHY_POLL, }; - -static struct mii_bus cpmac_mii = { - .name = "cpmac-mii", - .read = cpmac_mdio_read, - .write = cpmac_mdio_write, - .reset = cpmac_mdio_reset, - .irq = mii_irqs, -}; - -static int cpmac_config(struct net_device *dev, struct ifmap *map) -{ - if (dev->flags & IFF_UP) - return -EBUSY; - - /* Don't allow changing the I/O address */ - if (map->base_addr != dev->base_addr) - return -EOPNOTSUPP; - - /* ignore other fields */ - return 0; -} - -static void cpmac_set_multicast_list(struct net_device *dev) -{ - struct dev_mc_list *iter; - int i; - u8 tmp; - u32 mbp, bit, hash[2] = { 0, }; - struct cpmac_priv *priv = netdev_priv(dev); - - mbp = cpmac_read(priv->regs, CPMAC_MBP); - if (dev->flags & IFF_PROMISC) { - cpmac_write(priv->regs, CPMAC_MBP, (mbp & ~MBP_PROMISCCHAN(0)) | - MBP_RXPROMISC); - } else { - cpmac_write(priv->regs, CPMAC_MBP, mbp & ~MBP_RXPROMISC); - if (dev->flags & IFF_ALLMULTI) { - /* enable all multicast mode */ - cpmac_write(priv->regs, CPMAC_MAC_HASH_LO, 0xffffffff); - cpmac_write(priv->regs, CPMAC_MAC_HASH_HI, 0xffffffff); - } else { - /* - * cpmac uses some strange mac address hashing - * (not crc32) - */ - for (i = 0, iter = dev->mc_list; i < dev->mc_count; - i++, iter = iter->next) { - bit = 0; - tmp = iter->dmi_addr[0]; - bit ^= (tmp >> 2) ^ (tmp << 4); - tmp = iter->dmi_addr[1]; - bit ^= (tmp >> 4) ^ (tmp << 2); - tmp = iter->dmi_addr[2]; - bit ^= (tmp >> 6) ^ tmp; - tmp = iter->dmi_addr[3]; - bit ^= (tmp >> 2) ^ (tmp << 4); - tmp = iter->dmi_addr[4]; - bit ^= (tmp >> 4) ^ (tmp << 2); - tmp = iter->dmi_addr[5]; - bit ^= (tmp >> 6) ^ tmp; - bit &= 0x3f; - hash[bit / 32] |= 1 << (bit % 32); - } - - cpmac_write(priv->regs, CPMAC_MAC_HASH_LO, hash[0]); - cpmac_write(priv->regs, CPMAC_MAC_HASH_HI, hash[1]); - } - } -} - -static struct sk_buff *cpmac_rx_one(struct net_device *dev, - struct cpmac_priv *priv, - struct cpmac_desc *desc) -{ - struct sk_buff *skb, *result = NULL; - - if (unlikely(netif_msg_hw(priv))) - cpmac_dump_desc(dev, desc); - cpmac_write(priv->regs, CPMAC_RX_ACK(0), (u32)desc->mapping); - if (unlikely(!desc->datalen)) { - if (netif_msg_rx_err(priv) && net_ratelimit()) - printk(KERN_WARNING "%s: rx: spurious interrupt\n", - dev->name); - return NULL; - } - - skb = netdev_alloc_skb(dev, CPMAC_SKB_SIZE); - if (likely(skb)) { - skb_reserve(skb, 2); - skb_put(desc->skb, desc->datalen); - desc->skb->protocol = eth_type_trans(desc->skb, dev); - desc->skb->ip_summed = CHECKSUM_NONE; - dev->stats.rx_packets++; - dev->stats.rx_bytes += desc->datalen; - result = desc->skb; - dma_unmap_single(&dev->dev, desc->data_mapping, CPMAC_SKB_SIZE, - DMA_FROM_DEVICE); - desc->skb = skb; - desc->data_mapping = dma_map_single(&dev->dev, skb->data, - CPMAC_SKB_SIZE, - DMA_FROM_DEVICE); - desc->hw_data = (u32)desc->data_mapping; - if (unlikely(netif_msg_pktdata(priv))) { - printk(KERN_DEBUG "%s: received packet:\n", dev->name); - cpmac_dump_skb(dev, result); - } - } else { - if (netif_msg_rx_err(priv) && net_ratelimit()) - printk(KERN_WARNING - "%s: low on skbs, dropping packet\n", dev->name); - dev->stats.rx_dropped++; - } - - desc->buflen = CPMAC_SKB_SIZE; - desc->dataflags = CPMAC_OWN; - - return result; -} - -static int cpmac_poll(struct net_device *dev, int *budget) -{ - struct sk_buff *skb; - struct cpmac_desc *desc, *restart; - int received = 0, processed = 0, quota = min(dev->quota, *budget); - struct cpmac_priv *priv = netdev_priv(dev); - - spin_lock(&priv->rx_lock); - if (unlikely(!priv->rx_head)) { - if (netif_msg_rx_err(priv) && net_ratelimit()) - printk(KERN_WARNING "%s: rx: polling, but no queue\n", - dev->name); - spin_unlock(&priv->rx_lock); - netif_rx_complete(dev); - return 0; - } - - desc = priv->rx_head; - restart = NULL; - while ((received < quota) && ((desc->dataflags & CPMAC_OWN) == 0)) { - processed++; - - if ((desc->dataflags & CPMAC_EOQ) != 0) { - /* The last update to eoq->hw_next didn't happen soon enough, and the - * receiver stopped here. Remember this descriptor so we can restart - * the receiver after freeing some space. - */ - if (unlikely(restart)) { - if (netif_msg_rx_err(priv)) - printk(KERN_ERR "%s: poll found a duplicate EOQ: %p and %p\n", - dev->name, restart, desc); - goto fatal_error; - } - - restart = desc->next; - } - - skb = cpmac_rx_one(dev, priv, desc); - if (likely(skb)) { - netif_receive_skb(skb); - received++; - } - desc = desc->next; - } - - if (desc != priv->rx_head) { - /* We freed some buffers, but not the whole ring, add what we did free to the rx list */ - desc->prev->hw_next = (u32)0; - priv->rx_head->prev->hw_next = priv->rx_head->mapping; - } - - /* Optimization: If we did not actually process an EOQ (perhaps because of - * quota limits), check to see if the tail of the queue has EOQ set. We - * should immediately restart in that case so that the receiver can restart - * and run in parallel with more packet processing. This lets us handle slightly - * larger bursts before running out of ring space (assuming dev->weight < ring_size) - */ - if (!restart && - (priv->rx_head->prev->dataflags & (CPMAC_OWN|CPMAC_EOQ)) == CPMAC_EOQ && - (priv->rx_head->dataflags & CPMAC_OWN) != 0) { - /* reset EOQ so the poll loop (above) doesn't try to restart this when it - * eventually gets to this descriptor. - */ - priv->rx_head->prev->dataflags &= ~CPMAC_EOQ; - restart = priv->rx_head; - } - - if (restart) { - dev->stats.rx_errors++; - dev->stats.rx_fifo_errors++; - if (netif_msg_rx_err(priv) && net_ratelimit()) - printk(KERN_WARNING "%s: rx dma ring overrun\n", dev->name); - - if (unlikely((restart->dataflags & CPMAC_OWN) == 0)) { - if (netif_msg_drv(priv)) - printk(KERN_ERR "%s: cpmac_poll is trying to restart rx from a descriptor that's not free: %p\n", - dev->name, restart); - goto fatal_error; - } - - cpmac_write(priv->regs, CPMAC_RX_PTR(0), restart->mapping); - } - - priv->rx_head = desc; - spin_unlock(&priv->rx_lock); - *budget -= received; - dev->quota -= received; - if (unlikely(netif_msg_rx_status(priv))) - printk(KERN_DEBUG "%s: poll processed %d packets\n", dev->name, - received); - - if (processed == 0) { - /* we ran out of packets to read, revert to interrupt-driven mode */ - netif_rx_complete(dev); - cpmac_write(priv->regs, CPMAC_RX_INT_ENABLE, 1); - return 0; - } - - return 1; - -fatal_error: - /* Something went horribly wrong. Reset hardware to try to recover rather than wedging. */ - - if (netif_msg_drv(priv)) { - printk(KERN_ERR "%s: cpmac_poll is confused. Resetting hardware\n", dev->name); - cpmac_dump_all_desc(dev); - printk(KERN_DEBUG "%s: RX_PTR(0)=0x%08x RX_ACK(0)=0x%08x\n", - dev->name, - cpmac_read(priv->regs, CPMAC_RX_PTR(0)), - cpmac_read(priv->regs, CPMAC_RX_ACK(0))); - } - - spin_unlock(&priv->rx_lock); - netif_rx_complete(dev); - netif_stop_queue(dev); - - atomic_inc(&priv->reset_pending); - cpmac_hw_stop(dev); - if (!schedule_work(&priv->reset_work)) - atomic_dec(&priv->reset_pending); - return 0; -} - -static int cpmac_start_xmit(struct sk_buff *skb, struct net_device *dev) -{ - int queue, len; - struct cpmac_desc *desc; - struct cpmac_priv *priv = netdev_priv(dev); - - if (unlikely(atomic_read(&priv->reset_pending))) - return NETDEV_TX_BUSY; - - if (unlikely(skb_padto(skb, ETH_ZLEN))) - return NETDEV_TX_OK; - - len = max(skb->len, ETH_ZLEN); - queue = skb->queue_mapping; -#ifdef CONFIG_NETDEVICES_MULTIQUEUE - netif_stop_subqueue(dev, queue); -#else - netif_stop_queue(dev); -#endif - - desc = &priv->desc_ring[queue]; - if (unlikely(desc->dataflags & CPMAC_OWN)) { - if (netif_msg_tx_err(priv) && net_ratelimit()) - printk(KERN_WARNING "%s: tx dma ring full\n", - dev->name); - return NETDEV_TX_BUSY; - } - - spin_lock(&priv->lock); - dev->trans_start = jiffies; - spin_unlock(&priv->lock); - desc->dataflags = CPMAC_SOP | CPMAC_EOP | CPMAC_OWN; - desc->skb = skb; - desc->data_mapping = dma_map_single(&dev->dev, skb->data, len, - DMA_TO_DEVICE); - desc->hw_data = (u32)desc->data_mapping; - desc->datalen = len; - desc->buflen = len; - if (unlikely(netif_msg_tx_queued(priv))) - printk(KERN_DEBUG "%s: sending 0x%p, len=%d\n", dev->name, skb, - skb->len); - if (unlikely(netif_msg_hw(priv))) - cpmac_dump_desc(dev, desc); - if (unlikely(netif_msg_pktdata(priv))) - cpmac_dump_skb(dev, skb); - cpmac_write(priv->regs, CPMAC_TX_PTR(queue), (u32)desc->mapping); - - return NETDEV_TX_OK; -} - -static void cpmac_end_xmit(struct net_device *dev, int queue) -{ - struct cpmac_desc *desc; - struct cpmac_priv *priv = netdev_priv(dev); - - desc = &priv->desc_ring[queue]; - cpmac_write(priv->regs, CPMAC_TX_ACK(queue), (u32)desc->mapping); - if (likely(desc->skb)) { - spin_lock(&priv->lock); - dev->stats.tx_packets++; - dev->stats.tx_bytes += desc->skb->len; - spin_unlock(&priv->lock); - dma_unmap_single(&dev->dev, desc->data_mapping, desc->skb->len, - DMA_TO_DEVICE); - - if (unlikely(netif_msg_tx_done(priv))) - printk(KERN_DEBUG "%s: sent 0x%p, len=%d\n", dev->name, - desc->skb, desc->skb->len); - - dev_kfree_skb_irq(desc->skb); - desc->skb = NULL; -#ifdef CONFIG_NETDEVICES_MULTIQUEUE - if (netif_subqueue_stopped(dev, queue)) - netif_wake_subqueue(dev, queue); -#else - if (netif_queue_stopped(dev)) - netif_wake_queue(dev); -#endif - } else { - if (netif_msg_tx_err(priv) && net_ratelimit()) - printk(KERN_WARNING - "%s: end_xmit: spurious interrupt\n", dev->name); -#ifdef CONFIG_NETDEVICES_MULTIQUEUE - if (netif_subqueue_stopped(dev, queue)) - netif_wake_subqueue(dev, queue); -#else - if (netif_queue_stopped(dev)) - netif_wake_queue(dev); -#endif - } -} - -static void cpmac_hw_stop(struct net_device *dev) -{ - int i; - struct cpmac_priv *priv = netdev_priv(dev); - struct plat_cpmac_data *pdata = priv->pdev->dev.platform_data; - - ar7_device_reset(pdata->reset_bit); - cpmac_write(priv->regs, CPMAC_RX_CONTROL, - cpmac_read(priv->regs, CPMAC_RX_CONTROL) & ~1); - cpmac_write(priv->regs, CPMAC_TX_CONTROL, - cpmac_read(priv->regs, CPMAC_TX_CONTROL) & ~1); - for (i = 0; i < 8; i++) { - cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0); - cpmac_write(priv->regs, CPMAC_RX_PTR(i), 0); - } - cpmac_write(priv->regs, CPMAC_UNICAST_CLEAR, 0xff); - cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 0xff); - cpmac_write(priv->regs, CPMAC_TX_INT_CLEAR, 0xff); - cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff); - cpmac_write(priv->regs, CPMAC_MAC_CONTROL, - cpmac_read(priv->regs, CPMAC_MAC_CONTROL) & ~MAC_MII); -} - -static void cpmac_hw_start(struct net_device *dev) -{ - int i; - struct cpmac_priv *priv = netdev_priv(dev); - struct plat_cpmac_data *pdata = priv->pdev->dev.platform_data; - - ar7_device_reset(pdata->reset_bit); - for (i = 0; i < 8; i++) { - cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0); - cpmac_write(priv->regs, CPMAC_RX_PTR(i), 0); - } - cpmac_write(priv->regs, CPMAC_RX_PTR(0), priv->rx_head->mapping); - - cpmac_write(priv->regs, CPMAC_MBP, MBP_RXSHORT | MBP_RXBCAST | - MBP_RXMCAST); - cpmac_write(priv->regs, CPMAC_BUFFER_OFFSET, 0); - for (i = 0; i < 8; i++) - cpmac_write(priv->regs, CPMAC_MAC_ADDR_LO(i), dev->dev_addr[5]); - cpmac_write(priv->regs, CPMAC_MAC_ADDR_MID, dev->dev_addr[4]); - cpmac_write(priv->regs, CPMAC_MAC_ADDR_HI, dev->dev_addr[0] | - (dev->dev_addr[1] << 8) | (dev->dev_addr[2] << 16) | - (dev->dev_addr[3] << 24)); - cpmac_write(priv->regs, CPMAC_MAX_LENGTH, CPMAC_SKB_SIZE); - cpmac_write(priv->regs, CPMAC_UNICAST_CLEAR, 0xff); - cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 0xff); - cpmac_write(priv->regs, CPMAC_TX_INT_CLEAR, 0xff); - cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff); - cpmac_write(priv->regs, CPMAC_UNICAST_ENABLE, 1); - cpmac_write(priv->regs, CPMAC_RX_INT_ENABLE, 1); - cpmac_write(priv->regs, CPMAC_TX_INT_ENABLE, 0xff); - cpmac_write(priv->regs, CPMAC_MAC_INT_ENABLE, 3); - - cpmac_write(priv->regs, CPMAC_RX_CONTROL, - cpmac_read(priv->regs, CPMAC_RX_CONTROL) | 1); - cpmac_write(priv->regs, CPMAC_TX_CONTROL, - cpmac_read(priv->regs, CPMAC_TX_CONTROL) | 1); - cpmac_write(priv->regs, CPMAC_MAC_CONTROL, - cpmac_read(priv->regs, CPMAC_MAC_CONTROL) | MAC_MII | - MAC_FDX); -} - -static void cpmac_clear_rx(struct net_device *dev) -{ - struct cpmac_priv *priv = netdev_priv(dev); - struct cpmac_desc *desc; - int i; - if (unlikely(!priv->rx_head)) - return; - desc = priv->rx_head; - for (i = 0; i < priv->ring_size; i++) { - if ((desc->dataflags & CPMAC_OWN) == 0) { - if (netif_msg_rx_err(priv) && net_ratelimit()) - printk(KERN_WARNING "%s: packet dropped\n", - dev->name); - if (unlikely(netif_msg_hw(priv))) - cpmac_dump_desc(dev, desc); - desc->dataflags = CPMAC_OWN; - dev->stats.rx_dropped++; - } - desc->hw_next = desc->next->mapping; - desc = desc->next; - } - - priv->rx_head->prev->hw_next = 0; -} - -static void cpmac_clear_tx(struct net_device *dev) -{ - struct cpmac_priv *priv = netdev_priv(dev); - int i; - if (unlikely(!priv->desc_ring)) - return; - for (i = 0; i < CPMAC_QUEUES; i++) { - priv->desc_ring[i].dataflags = 0; - if (priv->desc_ring[i].skb) { - dev_kfree_skb_any(priv->desc_ring[i].skb); - priv->desc_ring[i].skb = NULL; - } - } -} - -static void cpmac_hw_error(struct work_struct *work) -{ - int i; - struct cpmac_priv *priv = - container_of(work, struct cpmac_priv, reset_work); - - spin_lock(&priv->rx_lock); - cpmac_clear_rx(priv->dev); - spin_unlock(&priv->rx_lock); - cpmac_clear_tx(priv->dev); - cpmac_hw_start(priv->dev); - barrier(); - atomic_dec(&priv->reset_pending); - - for (i = 0; i < CPMAC_QUEUES; i++) { - netif_wake_subqueue(priv->dev, i); - } - netif_wake_queue(priv->dev); -} - -static void cpmac_check_status(struct net_device *dev) -{ - struct cpmac_priv *priv = netdev_priv(dev); - - u32 macstatus = cpmac_read(priv->regs, CPMAC_MAC_STATUS); - int rx_channel = (macstatus >> 8) & 7; - int rx_code = (macstatus >> 12) & 15; - int tx_channel = (macstatus >> 16) & 7; - int tx_code = (macstatus >> 20) & 15; - - if (rx_code || tx_code) { - if (netif_msg_drv(priv) && net_ratelimit()) { - /* Can't find any documentation on what these error codes actually are. - * So just log them and hope.. - */ - if (rx_code) - printk(KERN_WARNING "%s: host error %d on rx channel %d (macstatus %08x), resetting\n", - dev->name, rx_code, rx_channel, macstatus); - if (tx_code) - printk(KERN_WARNING "%s: host error %d on tx channel %d (macstatus %08x), resetting\n", - dev->name, tx_code, tx_channel, macstatus); - } - - netif_stop_queue(dev); - cpmac_hw_stop(dev); - if (schedule_work(&priv->reset_work)) - atomic_inc(&priv->reset_pending); - if (unlikely(netif_msg_hw(priv))) - cpmac_dump_regs(dev); - } -} - -static irqreturn_t cpmac_irq(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - struct cpmac_priv *priv; - int queue; - u32 status; - - if (!dev) - return IRQ_NONE; - - priv = netdev_priv(dev); - - status = cpmac_read(priv->regs, CPMAC_MAC_INT_VECTOR); - - if (unlikely(netif_msg_intr(priv))) - printk(KERN_DEBUG "%s: interrupt status: 0x%08x\n", dev->name, - status); - - if (status & MAC_INT_TX) - cpmac_end_xmit(dev, (status & 7)); - - if (status & MAC_INT_RX) { - queue = (status >> 8) & 7; - netif_rx_schedule(dev); - cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 1 << queue); - } - - cpmac_write(priv->regs, CPMAC_MAC_EOI_VECTOR, 0); - - if (unlikely(status & (MAC_INT_HOST | MAC_INT_STATUS))) - cpmac_check_status(dev); - - return IRQ_HANDLED; -} - -static void cpmac_tx_timeout(struct net_device *dev) -{ - int i; - struct cpmac_priv *priv = netdev_priv(dev); - - spin_lock(&priv->lock); - dev->stats.tx_errors++; - spin_unlock(&priv->lock); - if (netif_msg_tx_err(priv) && net_ratelimit()) - printk(KERN_WARNING "%s: transmit timeout\n", dev->name); - - atomic_inc(&priv->reset_pending); - barrier(); - cpmac_clear_tx(dev); - barrier(); - atomic_dec(&priv->reset_pending); - - netif_wake_queue(priv->dev); - for (i = 0; i < CPMAC_QUEUES; i++) { - netif_wake_subqueue(dev, i); - } -} - -static int cpmac_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) -{ - struct cpmac_priv *priv = netdev_priv(dev); - if (!(netif_running(dev))) - return -EINVAL; - if (!priv->phy) - return -EINVAL; - if ((cmd == SIOCGMIIPHY) || (cmd == SIOCGMIIREG) || - (cmd == SIOCSMIIREG)) - return phy_mii_ioctl(priv->phy, if_mii(ifr), cmd); - - return -EOPNOTSUPP; -} - -static int cpmac_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) -{ - struct cpmac_priv *priv = netdev_priv(dev); - - if (priv->phy) - return phy_ethtool_gset(priv->phy, cmd); - - return -EINVAL; -} - -static int cpmac_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) -{ - struct cpmac_priv *priv = netdev_priv(dev); - - if (!capable(CAP_NET_ADMIN)) - return -EPERM; - - if (priv->phy) - return phy_ethtool_sset(priv->phy, cmd); - - return -EINVAL; -} - -static void cpmac_get_ringparam(struct net_device *dev, struct ethtool_ringparam* ring) -{ - struct cpmac_priv *priv = netdev_priv(dev); - - ring->rx_max_pending = 1024; - ring->rx_mini_max_pending = 1; - ring->rx_jumbo_max_pending = 1; - ring->tx_max_pending = 1; - - ring->rx_pending = priv->ring_size; - ring->rx_mini_pending = 1; - ring->rx_jumbo_pending = 1; - ring->tx_pending = 1; -} - -static int cpmac_set_ringparam(struct net_device *dev, struct ethtool_ringparam* ring) -{ - struct cpmac_priv *priv = netdev_priv(dev); - - if (netif_running(dev)) - return -EBUSY; - priv->ring_size = ring->rx_pending; - return 0; -} - -static void cpmac_get_drvinfo(struct net_device *dev, - struct ethtool_drvinfo *info) -{ - strcpy(info->driver, "cpmac"); - strcpy(info->version, CPMAC_VERSION); - info->fw_version[0] = '\0'; - sprintf(info->bus_info, "%s", "cpmac"); - info->regdump_len = 0; -} - -static const struct ethtool_ops cpmac_ethtool_ops = { - .get_settings = cpmac_get_settings, - .set_settings = cpmac_set_settings, - .get_drvinfo = cpmac_get_drvinfo, - .get_link = ethtool_op_get_link, - .get_ringparam = cpmac_get_ringparam, - .set_ringparam = cpmac_set_ringparam, -}; - -static void cpmac_adjust_link(struct net_device *dev) -{ - struct cpmac_priv *priv = netdev_priv(dev); - int new_state = 0; - - spin_lock(&priv->lock); - if (priv->phy->link) { - netif_start_queue(dev); - if (priv->phy->duplex != priv->oldduplex) { - new_state = 1; - priv->oldduplex = priv->phy->duplex; - } - - if (priv->phy->speed != priv->oldspeed) { - new_state = 1; - priv->oldspeed = priv->phy->speed; - } - - if (!priv->oldlink) { - new_state = 1; - priv->oldlink = 1; - netif_schedule(dev); - } - } else if (priv->oldlink) { - netif_stop_queue(dev); - new_state = 1; - priv->oldlink = 0; - priv->oldspeed = 0; - priv->oldduplex = -1; - } - - if (new_state && netif_msg_link(priv) && net_ratelimit()) - phy_print_status(priv->phy); - - spin_unlock(&priv->lock); -} - -static int cpmac_open(struct net_device *dev) -{ - int i, size, res; - struct cpmac_priv *priv = netdev_priv(dev); - struct resource *mem; - struct cpmac_desc *desc; - struct sk_buff *skb; - - priv->phy = phy_connect(dev, priv->phy_name, &cpmac_adjust_link, - 0, PHY_INTERFACE_MODE_MII); - if (IS_ERR(priv->phy)) { - if (netif_msg_drv(priv)) - printk(KERN_ERR "%s: Could not attach to PHY\n", - dev->name); - return PTR_ERR(priv->phy); - } - - mem = platform_get_resource_byname(priv->pdev, IORESOURCE_MEM, "regs"); - if (!request_mem_region(mem->start, mem->end - mem->start, dev->name)) { - if (netif_msg_drv(priv)) - printk(KERN_ERR "%s: failed to request registers\n", - dev->name); - res = -ENXIO; - goto fail_reserve; - } - - priv->regs = ioremap(mem->start, mem->end - mem->start); - if (!priv->regs) { - if (netif_msg_drv(priv)) - printk(KERN_ERR "%s: failed to remap registers\n", - dev->name); - res = -ENXIO; - goto fail_remap; - } - - size = priv->ring_size + CPMAC_QUEUES; - priv->desc_ring = dma_alloc_coherent(&dev->dev, - sizeof(struct cpmac_desc) * size, - &priv->dma_ring, - GFP_KERNEL); - if (!priv->desc_ring) { - res = -ENOMEM; - goto fail_alloc; - } - - for (i = 0; i < size; i++) - priv->desc_ring[i].mapping = priv->dma_ring + sizeof(*desc) * i; - - priv->rx_head = &priv->desc_ring[CPMAC_QUEUES]; - for (i = 0, desc = priv->rx_head; i < priv->ring_size; i++, desc++) { - skb = netdev_alloc_skb(dev, CPMAC_SKB_SIZE); - if (unlikely(!skb)) { - res = -ENOMEM; - goto fail_desc; - } - skb_reserve(skb, 2); - desc->skb = skb; - desc->data_mapping = dma_map_single(&dev->dev, skb->data, - CPMAC_SKB_SIZE, - DMA_FROM_DEVICE); - desc->hw_data = (u32)desc->data_mapping; - desc->buflen = CPMAC_SKB_SIZE; - desc->dataflags = CPMAC_OWN; - desc->next = &priv->rx_head[(i + 1) % priv->ring_size]; - desc->next->prev = desc; - desc->hw_next = (u32)desc->next->mapping; - } - - priv->rx_head->prev->hw_next = (u32)0; - - if ((res = request_irq(dev->irq, cpmac_irq, IRQF_SHARED, - dev->name, dev))) { - if (netif_msg_drv(priv)) - printk(KERN_ERR "%s: failed to obtain irq\n", - dev->name); - goto fail_irq; - } - - atomic_set(&priv->reset_pending, 0); - INIT_WORK(&priv->reset_work, cpmac_hw_error); - cpmac_hw_start(dev); - - priv->phy->state = PHY_CHANGELINK; - phy_start(priv->phy); - - return 0; - -fail_irq: -fail_desc: - for (i = 0; i < priv->ring_size; i++) { - if (priv->rx_head[i].skb) { - dma_unmap_single(&dev->dev, - priv->rx_head[i].data_mapping, - CPMAC_SKB_SIZE, - DMA_FROM_DEVICE); - kfree_skb(priv->rx_head[i].skb); - } - } -fail_alloc: - kfree(priv->desc_ring); - iounmap(priv->regs); - -fail_remap: - release_mem_region(mem->start, mem->end - mem->start); - -fail_reserve: - phy_disconnect(priv->phy); - - return res; -} - -static int cpmac_stop(struct net_device *dev) -{ - int i; - struct cpmac_priv *priv = netdev_priv(dev); - struct resource *mem; - - netif_stop_queue(dev); - - cancel_work_sync(&priv->reset_work); - phy_stop(priv->phy); - phy_disconnect(priv->phy); - priv->phy = NULL; - - cpmac_hw_stop(dev); - - for (i = 0; i < 8; i++) - cpmac_write(priv->regs, CPMAC_TX_PTR(i), 0); - cpmac_write(priv->regs, CPMAC_RX_PTR(0), 0); - cpmac_write(priv->regs, CPMAC_MBP, 0); - - free_irq(dev->irq, dev); - iounmap(priv->regs); - mem = platform_get_resource_byname(priv->pdev, IORESOURCE_MEM, "regs"); - release_mem_region(mem->start, mem->end - mem->start); - priv->rx_head = &priv->desc_ring[CPMAC_QUEUES]; - for (i = 0; i < priv->ring_size; i++) { - if (priv->rx_head[i].skb) { - dma_unmap_single(&dev->dev, - priv->rx_head[i].data_mapping, - CPMAC_SKB_SIZE, - DMA_FROM_DEVICE); - kfree_skb(priv->rx_head[i].skb); - } - } - - dma_free_coherent(&dev->dev, sizeof(struct cpmac_desc) * - (CPMAC_QUEUES + priv->ring_size), - priv->desc_ring, priv->dma_ring); - return 0; -} - -static int external_switch; - -static int __devinit cpmac_probe(struct platform_device *pdev) -{ - int rc, phy_id; - struct resource *mem; - struct cpmac_priv *priv; - struct net_device *dev; - struct plat_cpmac_data *pdata; - - pdata = pdev->dev.platform_data; - - for (phy_id = 0; phy_id < PHY_MAX_ADDR; phy_id++) { - if (!(pdata->phy_mask & (1 << phy_id))) - continue; - if (!cpmac_mii.phy_map[phy_id]) - continue; - break; - } - - if (phy_id == PHY_MAX_ADDR) { - if (external_switch || dumb_switch) - phy_id = 0; - else { - printk(KERN_ERR "cpmac: no PHY present\n"); - return -ENODEV; - } - } - - dev = alloc_etherdev_mq(sizeof(*priv), CPMAC_QUEUES); - - if (!dev) { - printk(KERN_ERR "cpmac: Unable to allocate net_device\n"); - return -ENOMEM; - } - - platform_set_drvdata(pdev, dev); - priv = netdev_priv(dev); - - priv->pdev = pdev; - mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs"); - if (!mem) { - rc = -ENODEV; - goto fail; - } - - dev->irq = platform_get_irq_byname(pdev, "irq"); - - dev->open = cpmac_open; - dev->stop = cpmac_stop; - dev->set_config = cpmac_config; - dev->hard_start_xmit = cpmac_start_xmit; - dev->do_ioctl = cpmac_ioctl; - dev->set_multicast_list = cpmac_set_multicast_list; - dev->tx_timeout = cpmac_tx_timeout; - dev->ethtool_ops = &cpmac_ethtool_ops; - dev->poll = cpmac_poll; - dev->features |= NETIF_F_MULTI_QUEUE; - - spin_lock_init(&priv->lock); - spin_lock_init(&priv->rx_lock); - priv->dev = dev; - priv->ring_size = 64; - dev->weight = max(4, priv->ring_size/4); - priv->msg_enable = netif_msg_init(debug_level, 0xff); - memcpy(dev->dev_addr, pdata->dev_addr, sizeof(dev->dev_addr)); - if (phy_id == 31) { - snprintf(priv->phy_name, BUS_ID_SIZE, PHY_ID_FMT, - cpmac_mii.id, phy_id); - } else - snprintf(priv->phy_name, BUS_ID_SIZE, "fixed@%d:%d", 100, 1); - - if ((rc = register_netdev(dev))) { - printk(KERN_ERR "cpmac: error %i registering device %s\n", rc, - dev->name); - goto fail; - } - - if (netif_msg_probe(priv)) { - printk(KERN_INFO - "cpmac: device %s (regs: %p, irq: %d, phy: %s, mac: " - MAC_FMT ")\n", dev->name, (void *)mem->start, dev->irq, - priv->phy_name, MAC_ARG(dev->dev_addr)); - } - return 0; - -fail: - free_netdev(dev); - return rc; -} - -static int __devexit cpmac_remove(struct platform_device *pdev) -{ - struct net_device *dev = platform_get_drvdata(pdev); - unregister_netdev(dev); - free_netdev(dev); - return 0; -} - -static struct platform_driver cpmac_driver = { - .driver.name = "cpmac", - .probe = cpmac_probe, - .remove = __devexit_p(cpmac_remove), -}; - -int __devinit cpmac_init(void) -{ - u32 mask; - int i, res; - - cpmac_mii.priv = ioremap(AR7_REGS_MDIO, 256); - - if (!cpmac_mii.priv) { - printk(KERN_ERR "Can't ioremap mdio registers\n"); - return -ENXIO; - } - -#warning FIXME: unhardcode gpio&reset bits - ar7_gpio_disable(26); - ar7_gpio_disable(27); - ar7_device_reset(AR7_RESET_BIT_CPMAC_LO); - ar7_device_reset(AR7_RESET_BIT_CPMAC_HI); - ar7_device_reset(AR7_RESET_BIT_EPHY); - - cpmac_mii.reset(&cpmac_mii); - - for (i = 0; i < 300000; i++) - if ((mask = cpmac_read(cpmac_mii.priv, CPMAC_MDIO_ALIVE))) - break; - else - cpu_relax(); - - mask &= 0x7fffffff; - if (mask & (mask - 1)) { - external_switch = 1; - mask = 0; - } - - cpmac_mii.phy_mask = ~(mask | 0x80000000); - - res = mdiobus_register(&cpmac_mii); - if (res) - goto fail_mii; - - res = platform_driver_register(&cpmac_driver); - if (res) - goto fail_cpmac; - - return 0; - -fail_cpmac: - mdiobus_unregister(&cpmac_mii); - -fail_mii: - iounmap(cpmac_mii.priv); - - return res; -} - -void __devexit cpmac_exit(void) -{ - platform_driver_unregister(&cpmac_driver); - mdiobus_unregister(&cpmac_mii); - iounmap(cpmac_mii.priv); -} - -module_init(cpmac_init); -module_exit(cpmac_exit); |