diff options
Diffstat (limited to 'drivers/net/ethernet/ti/cpmac.c')
| -rw-r--r-- | drivers/net/ethernet/ti/cpmac.c | 1251 |
1 files changed, 0 insertions, 1251 deletions
diff --git a/drivers/net/ethernet/ti/cpmac.c b/drivers/net/ethernet/ti/cpmac.c deleted file mode 100644 index 80eeeb463c..0000000000 --- a/drivers/net/ethernet/ti/cpmac.c +++ /dev/null @@ -1,1251 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright (C) 2006, 2007 Eugene Konev - * - */ - -#include <linux/module.h> -#include <linux/interrupt.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/netdevice.h> -#include <linux/if_vlan.h> -#include <linux/etherdevice.h> -#include <linux/ethtool.h> -#include <linux/skbuff.h> -#include <linux/mii.h> -#include <linux/phy.h> -#include <linux/phy_fixed.h> -#include <linux/platform_device.h> -#include <linux/dma-mapping.h> -#include <linux/clk.h> -#include <linux/gpio.h> -#include <linux/atomic.h> - -#include <asm/mach-ar7/ar7.h> - -MODULE_AUTHOR("Eugene Konev <ejka@imfi.kspu.ru>"); -MODULE_DESCRIPTION("TI AR7 ethernet driver (CPMAC)"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:cpmac"); - -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 "0.5.2" -/* frame size + 802.1q tag + FCS size */ -#define CPMAC_SKB_SIZE (ETH_FRAME_LEN + ETH_FCS_LEN + VLAN_HLEN) -#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; - char phy_name[MII_BUS_ID_SIZE + 3]; - int oldlink, oldspeed, oldduplex; - u32 msg_enable; - struct net_device *dev; - struct work_struct reset_work; - struct platform_device *pdev; - struct napi_struct napi; - 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("%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("%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("%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("%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) -{ - struct clk *cpmac_clk; - - cpmac_clk = clk_get(&bus->dev, "cpmac"); - if (IS_ERR(cpmac_clk)) { - pr_err("unable to get cpmac clock\n"); - return -1; - } - ar7_device_reset(AR7_RESET_BIT_MDIO); - cpmac_write(bus->priv, CPMAC_MDIO_CONTROL, MDIOC_ENABLE | - MDIOC_CLKDIV(clk_get_rate(cpmac_clk) / 2200000 - 1)); - - return 0; -} - -static struct mii_bus *cpmac_mii; - -static void cpmac_set_multicast_list(struct net_device *dev) -{ - struct netdev_hw_addr *ha; - 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) - */ - netdev_for_each_mc_addr(ha, dev) { - bit = 0; - tmp = ha->addr[0]; - bit ^= (tmp >> 2) ^ (tmp << 4); - tmp = ha->addr[1]; - bit ^= (tmp >> 4) ^ (tmp << 2); - tmp = ha->addr[2]; - bit ^= (tmp >> 6) ^ tmp; - tmp = ha->addr[3]; - bit ^= (tmp >> 2) ^ (tmp << 4); - tmp = ha->addr[4]; - bit ^= (tmp >> 4) ^ (tmp << 2); - tmp = ha->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 cpmac_priv *priv, - struct cpmac_desc *desc) -{ - struct sk_buff *skb, *result = NULL; - - if (unlikely(netif_msg_hw(priv))) - cpmac_dump_desc(priv->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()) - netdev_warn(priv->dev, "rx: spurious interrupt\n"); - - return NULL; - } - - skb = netdev_alloc_skb_ip_align(priv->dev, CPMAC_SKB_SIZE); - if (likely(skb)) { - skb_put(desc->skb, desc->datalen); - desc->skb->protocol = eth_type_trans(desc->skb, priv->dev); - skb_checksum_none_assert(desc->skb); - priv->dev->stats.rx_packets++; - priv->dev->stats.rx_bytes += desc->datalen; - result = desc->skb; - dma_unmap_single(&priv->dev->dev, desc->data_mapping, - CPMAC_SKB_SIZE, DMA_FROM_DEVICE); - desc->skb = skb; - desc->data_mapping = dma_map_single(&priv->dev->dev, skb->data, - CPMAC_SKB_SIZE, - DMA_FROM_DEVICE); - desc->hw_data = (u32)desc->data_mapping; - if (unlikely(netif_msg_pktdata(priv))) { - netdev_dbg(priv->dev, "received packet:\n"); - cpmac_dump_skb(priv->dev, result); - } - } else { - if (netif_msg_rx_err(priv) && net_ratelimit()) - netdev_warn(priv->dev, - "low on skbs, dropping packet\n"); - - priv->dev->stats.rx_dropped++; - } - - desc->buflen = CPMAC_SKB_SIZE; - desc->dataflags = CPMAC_OWN; - - return result; -} - -static int cpmac_poll(struct napi_struct *napi, int budget) -{ - struct sk_buff *skb; - struct cpmac_desc *desc, *restart; - struct cpmac_priv *priv = container_of(napi, struct cpmac_priv, napi); - int received = 0, processed = 0; - - spin_lock(&priv->rx_lock); - if (unlikely(!priv->rx_head)) { - if (netif_msg_rx_err(priv) && net_ratelimit()) - netdev_warn(priv->dev, "rx: polling, but no queue\n"); - - spin_unlock(&priv->rx_lock); - napi_complete(napi); - return 0; - } - - desc = priv->rx_head; - restart = NULL; - while (((desc->dataflags & CPMAC_OWN) == 0) && (received < budget)) { - 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)) - netdev_err(priv->dev, "poll found a" - " duplicate EOQ: %p and %p\n", - restart, desc); - goto fatal_error; - } - - restart = desc->next; - } - - skb = cpmac_rx_one(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) { - priv->dev->stats.rx_errors++; - priv->dev->stats.rx_fifo_errors++; - if (netif_msg_rx_err(priv) && net_ratelimit()) - netdev_warn(priv->dev, "rx dma ring overrun\n"); - - if (unlikely((restart->dataflags & CPMAC_OWN) == 0)) { - if (netif_msg_drv(priv)) - netdev_err(priv->dev, "cpmac_poll is trying " - "to restart rx from a descriptor " - "that's not free: %p\n", restart); - goto fatal_error; - } - - cpmac_write(priv->regs, CPMAC_RX_PTR(0), restart->mapping); - } - - priv->rx_head = desc; - spin_unlock(&priv->rx_lock); - if (unlikely(netif_msg_rx_status(priv))) - netdev_dbg(priv->dev, "poll processed %d packets\n", received); - - if (processed == 0) { - /* we ran out of packets to read, - * revert to interrupt-driven mode - */ - napi_complete(napi); - 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)) { - netdev_err(priv->dev, "cpmac_poll is confused. " - "Resetting hardware\n"); - cpmac_dump_all_desc(priv->dev); - netdev_dbg(priv->dev, "RX_PTR(0)=0x%08x RX_ACK(0)=0x%08x\n", - cpmac_read(priv->regs, CPMAC_RX_PTR(0)), - cpmac_read(priv->regs, CPMAC_RX_ACK(0))); - } - - spin_unlock(&priv->rx_lock); - napi_complete(napi); - netif_tx_stop_all_queues(priv->dev); - napi_disable(&priv->napi); - - atomic_inc(&priv->reset_pending); - cpmac_hw_stop(priv->dev); - if (!schedule_work(&priv->reset_work)) - atomic_dec(&priv->reset_pending); - - return 0; - -} - -static netdev_tx_t cpmac_start_xmit(struct sk_buff *skb, struct net_device *dev) -{ - int queue; - unsigned int 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_t(unsigned int, skb->len, ETH_ZLEN); - queue = skb_get_queue_mapping(skb); - netif_stop_subqueue(dev, queue); - - desc = &priv->desc_ring[queue]; - if (unlikely(desc->dataflags & CPMAC_OWN)) { - if (netif_msg_tx_err(priv) && net_ratelimit()) - netdev_warn(dev, "tx dma ring full\n"); - - return NETDEV_TX_BUSY; - } - - spin_lock(&priv->lock); - 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))) - netdev_dbg(dev, "sending 0x%p, len=%d\n", 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))) - netdev_dbg(dev, "sent 0x%p, len=%d\n", - desc->skb, desc->skb->len); - - dev_consume_skb_irq(desc->skb); - desc->skb = NULL; - if (__netif_subqueue_stopped(dev, queue)) - netif_wake_subqueue(dev, queue); - } else { - if (netif_msg_tx_err(priv) && net_ratelimit()) - netdev_warn(dev, "end_xmit: spurious interrupt\n"); - if (__netif_subqueue_stopped(dev, queue)) - netif_wake_subqueue(dev, queue); - } -} - -static void cpmac_hw_stop(struct net_device *dev) -{ - int i; - struct cpmac_priv *priv = netdev_priv(dev); - struct plat_cpmac_data *pdata = dev_get_platdata(&priv->pdev->dev); - - 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 = dev_get_platdata(&priv->pdev->dev); - - 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()) - netdev_warn(dev, "packet dropped\n"); - 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) -{ - 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); - - netif_tx_wake_all_queues(priv->dev); - cpmac_write(priv->regs, CPMAC_MAC_INT_ENABLE, 3); -} - -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) - netdev_warn(dev, "host error %d on rx " - "channel %d (macstatus %08x), resetting\n", - rx_code, rx_channel, macstatus); - if (tx_code) - netdev_warn(dev, "host error %d on tx " - "channel %d (macstatus %08x), resetting\n", - tx_code, tx_channel, macstatus); - } - - netif_tx_stop_all_queues(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); - } - cpmac_write(priv->regs, CPMAC_MAC_INT_CLEAR, 0xff); -} - -static irqreturn_t cpmac_irq(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - struct cpmac_priv *priv; - int queue; - u32 status; - - priv = netdev_priv(dev); - - status = cpmac_read(priv->regs, CPMAC_MAC_INT_VECTOR); - - if (unlikely(netif_msg_intr(priv))) - netdev_dbg(dev, "interrupt status: 0x%08x\n", status); - - if (status & MAC_INT_TX) - cpmac_end_xmit(dev, (status & 7)); - - if (status & MAC_INT_RX) { - queue = (status >> 8) & 7; - if (napi_schedule_prep(&priv->napi)) { - cpmac_write(priv->regs, CPMAC_RX_INT_CLEAR, 1 << queue); - __napi_schedule(&priv->napi); - } - } - - 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, unsigned int txqueue) -{ - 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()) - netdev_warn(dev, "transmit timeout\n"); - - atomic_inc(&priv->reset_pending); - barrier(); - cpmac_clear_tx(dev); - barrier(); - atomic_dec(&priv->reset_pending); - - netif_tx_wake_all_queues(priv->dev); -} - -static void cpmac_get_ringparam(struct net_device *dev, - struct ethtool_ringparam *ring, - struct kernel_ethtool_ringparam *kernel_ring, - struct netlink_ext_ack *extack) -{ - 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 kernel_ethtool_ringparam *kernel_ring, - struct netlink_ext_ack *extack) -{ - 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) -{ - strscpy(info->driver, "cpmac", sizeof(info->driver)); - strscpy(info->version, CPMAC_VERSION, sizeof(info->version)); - snprintf(info->bus_info, sizeof(info->bus_info), "%s", "cpmac"); -} - -static const struct ethtool_ops cpmac_ethtool_ops = { - .get_drvinfo = cpmac_get_drvinfo, - .get_link = ethtool_op_get_link, - .get_ringparam = cpmac_get_ringparam, - .set_ringparam = cpmac_set_ringparam, - .get_link_ksettings = phy_ethtool_get_link_ksettings, - .set_link_ksettings = phy_ethtool_set_link_ksettings, -}; - -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 (dev->phydev->link) { - netif_tx_start_all_queues(dev); - if (dev->phydev->duplex != priv->oldduplex) { - new_state = 1; - priv->oldduplex = dev->phydev->duplex; - } - - if (dev->phydev->speed != priv->oldspeed) { - new_state = 1; - priv->oldspeed = dev->phydev->speed; - } - - if (!priv->oldlink) { - new_state = 1; - priv->oldlink = 1; - } - } else if (priv->oldlink) { - new_state = 1; - priv->oldlink = 0; - priv->oldspeed = 0; - priv->oldduplex = -1; - } - - if (new_state && netif_msg_link(priv) && net_ratelimit()) - phy_print_status(dev->phydev); - - 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; - - mem = platform_get_resource_byname(priv->pdev, IORESOURCE_MEM, "regs"); - if (!request_mem_region(mem->start, resource_size(mem), dev->name)) { - if (netif_msg_drv(priv)) - netdev_err(dev, "failed to request registers\n"); - - res = -ENXIO; - goto fail_reserve; - } - - priv->regs = ioremap(mem->start, resource_size(mem)); - if (!priv->regs) { - if (netif_msg_drv(priv)) - netdev_err(dev, "failed to remap registers\n"); - - 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_ip_align(dev, CPMAC_SKB_SIZE); - if (unlikely(!skb)) { - res = -ENOMEM; - goto fail_desc; - } - 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; - - res = request_irq(dev->irq, cpmac_irq, IRQF_SHARED, dev->name, dev); - if (res) { - if (netif_msg_drv(priv)) - netdev_err(dev, "failed to obtain irq\n"); - - goto fail_irq; - } - - atomic_set(&priv->reset_pending, 0); - INIT_WORK(&priv->reset_work, cpmac_hw_error); - cpmac_hw_start(dev); - - napi_enable(&priv->napi); - phy_start(dev->phydev); - - 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); - } - } - dma_free_coherent(&dev->dev, sizeof(struct cpmac_desc) * size, - priv->desc_ring, priv->dma_ring); - -fail_alloc: - iounmap(priv->regs); - -fail_remap: - release_mem_region(mem->start, resource_size(mem)); - -fail_reserve: - return res; -} - -static int cpmac_stop(struct net_device *dev) -{ - int i; - struct cpmac_priv *priv = netdev_priv(dev); - struct resource *mem; - - netif_tx_stop_all_queues(dev); - - cancel_work_sync(&priv->reset_work); - napi_disable(&priv->napi); - phy_stop(dev->phydev); - - 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, resource_size(mem)); - 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 const struct net_device_ops cpmac_netdev_ops = { - .ndo_open = cpmac_open, - .ndo_stop = cpmac_stop, - .ndo_start_xmit = cpmac_start_xmit, - .ndo_tx_timeout = cpmac_tx_timeout, - .ndo_set_rx_mode = cpmac_set_multicast_list, - .ndo_eth_ioctl = phy_do_ioctl_running, - .ndo_validate_addr = eth_validate_addr, - .ndo_set_mac_address = eth_mac_addr, -}; - -static int external_switch; - -static int cpmac_probe(struct platform_device *pdev) -{ - int rc, phy_id; - char mdio_bus_id[MII_BUS_ID_SIZE]; - struct resource *mem; - struct cpmac_priv *priv; - struct net_device *dev; - struct plat_cpmac_data *pdata; - struct phy_device *phydev = NULL; - - pdata = dev_get_platdata(&pdev->dev); - - if (external_switch || dumb_switch) { - strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE); /* fixed phys bus */ - phy_id = pdev->id; - } else { - for (phy_id = 0; phy_id < PHY_MAX_ADDR; phy_id++) { - if (!(pdata->phy_mask & (1 << phy_id))) - continue; - if (!mdiobus_get_phy(cpmac_mii, phy_id)) - continue; - strncpy(mdio_bus_id, cpmac_mii->id, MII_BUS_ID_SIZE); - break; - } - } - - if (phy_id == PHY_MAX_ADDR) { - dev_err(&pdev->dev, "no PHY present, falling back " - "to switch on MDIO bus 0\n"); - strncpy(mdio_bus_id, "fixed-0", MII_BUS_ID_SIZE); /* fixed phys bus */ - phy_id = pdev->id; - } - mdio_bus_id[sizeof(mdio_bus_id) - 1] = '\0'; - - dev = alloc_etherdev_mq(sizeof(*priv), CPMAC_QUEUES); - if (!dev) - return -ENOMEM; - - SET_NETDEV_DEV(dev, &pdev->dev); - 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->netdev_ops = &cpmac_netdev_ops; - dev->ethtool_ops = &cpmac_ethtool_ops; - - netif_napi_add(dev, &priv->napi, cpmac_poll); - - spin_lock_init(&priv->lock); - spin_lock_init(&priv->rx_lock); - priv->dev = dev; - priv->ring_size = 64; - priv->msg_enable = netif_msg_init(debug_level, 0xff); - eth_hw_addr_set(dev, pdata->dev_addr); - - snprintf(priv->phy_name, MII_BUS_ID_SIZE, PHY_ID_FMT, - mdio_bus_id, phy_id); - - phydev = phy_connect(dev, priv->phy_name, cpmac_adjust_link, - PHY_INTERFACE_MODE_MII); - - if (IS_ERR(phydev)) { - if (netif_msg_drv(priv)) - dev_err(&pdev->dev, "Could not attach to PHY\n"); - - rc = PTR_ERR(phydev); - goto fail; - } - - rc = register_netdev(dev); - if (rc) { - dev_err(&pdev->dev, "Could not register net device\n"); - goto fail; - } - - if (netif_msg_probe(priv)) { - dev_info(&pdev->dev, "regs: %p, irq: %d, phy: %s, " - "mac: %pM\n", (void *)mem->start, dev->irq, - priv->phy_name, dev->dev_addr); - } - - return 0; - -fail: - free_netdev(dev); - return rc; -} - -static int 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 = cpmac_remove, -}; - -int __init cpmac_init(void) -{ - u32 mask; - int i, res; - - cpmac_mii = mdiobus_alloc(); - if (cpmac_mii == NULL) - return -ENOMEM; - - cpmac_mii->name = "cpmac-mii"; - cpmac_mii->read = cpmac_mdio_read; - cpmac_mii->write = cpmac_mdio_write; - cpmac_mii->reset = cpmac_mdio_reset; - - cpmac_mii->priv = ioremap(AR7_REGS_MDIO, 256); - - if (!cpmac_mii->priv) { - pr_err("Can't ioremap mdio registers\n"); - res = -ENXIO; - goto fail_alloc; - } - - /* 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 < 300; i++) { - mask = cpmac_read(cpmac_mii->priv, CPMAC_MDIO_ALIVE); - if (mask) - break; - else - msleep(10); - } - - mask &= 0x7fffffff; - if (mask & (mask - 1)) { - external_switch = 1; - mask = 0; - } - - cpmac_mii->phy_mask = ~(mask | 0x80000000); - snprintf(cpmac_mii->id, MII_BUS_ID_SIZE, "cpmac-1"); - - 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); - -fail_alloc: - mdiobus_free(cpmac_mii); - - return res; -} - -void __exit cpmac_exit(void) -{ - platform_driver_unregister(&cpmac_driver); - mdiobus_unregister(cpmac_mii); - iounmap(cpmac_mii->priv); - mdiobus_free(cpmac_mii); -} - -module_init(cpmac_init); -module_exit(cpmac_exit); |