+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Micrel KS8695 (Centaur) Ethernet.
- *
- * Copyright 2008 Simtec Electronics
- * Daniel Silverstone <dsilvers@simtec.co.uk>
- * Vincent Sanders <vince@simtec.co.uk>
- */
-
-#include <linux/dma-mapping.h>
-#include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/interrupt.h>
-#include <linux/skbuff.h>
-#include <linux/spinlock.h>
-#include <linux/crc32.h>
-#include <linux/mii.h>
-#include <linux/ethtool.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-
-#include <asm/irq.h>
-
-#include <mach/regs-switch.h>
-#include <mach/regs-misc.h>
-#include <asm/mach/irq.h>
-#include <mach/regs-irq.h>
-
-#include "ks8695net.h"
-
-#define MODULENAME "ks8695_ether"
-#define MODULEVERSION "1.02"
-
-/*
- * Transmit and device reset timeout, default 5 seconds.
- */
-static int watchdog = 5000;
-
-/* Hardware structures */
-
-/**
- * struct rx_ring_desc - Receive descriptor ring element
- * @status: The status of the descriptor element (E.g. who owns it)
- * @length: The number of bytes in the block pointed to by data_ptr
- * @data_ptr: The physical address of the data block to receive into
- * @next_desc: The physical address of the next descriptor element.
- */
-struct rx_ring_desc {
- __le32 status;
- __le32 length;
- __le32 data_ptr;
- __le32 next_desc;
-};
-
-/**
- * struct tx_ring_desc - Transmit descriptor ring element
- * @owner: Who owns the descriptor
- * @status: The number of bytes in the block pointed to by data_ptr
- * @data_ptr: The physical address of the data block to receive into
- * @next_desc: The physical address of the next descriptor element.
- */
-struct tx_ring_desc {
- __le32 owner;
- __le32 status;
- __le32 data_ptr;
- __le32 next_desc;
-};
-
-/**
- * struct ks8695_skbuff - sk_buff wrapper for rx/tx rings.
- * @skb: The buffer in the ring
- * @dma_ptr: The mapped DMA pointer of the buffer
- * @length: The number of bytes mapped to dma_ptr
- */
-struct ks8695_skbuff {
- struct sk_buff *skb;
- dma_addr_t dma_ptr;
- u32 length;
-};
-
-/* Private device structure */
-
-#define MAX_TX_DESC 8
-#define MAX_TX_DESC_MASK 0x7
-#define MAX_RX_DESC 16
-#define MAX_RX_DESC_MASK 0xf
-
-/*napi_weight have better more than rx DMA buffers*/
-#define NAPI_WEIGHT 64
-
-#define MAX_RXBUF_SIZE 0x700
-
-#define TX_RING_DMA_SIZE (sizeof(struct tx_ring_desc) * MAX_TX_DESC)
-#define RX_RING_DMA_SIZE (sizeof(struct rx_ring_desc) * MAX_RX_DESC)
-#define RING_DMA_SIZE (TX_RING_DMA_SIZE + RX_RING_DMA_SIZE)
-
-/**
- * enum ks8695_dtype - Device type
- * @KS8695_DTYPE_WAN: This device is a WAN interface
- * @KS8695_DTYPE_LAN: This device is a LAN interface
- * @KS8695_DTYPE_HPNA: This device is an HPNA interface
- */
-enum ks8695_dtype {
- KS8695_DTYPE_WAN,
- KS8695_DTYPE_LAN,
- KS8695_DTYPE_HPNA,
-};
-
-/**
- * struct ks8695_priv - Private data for the KS8695 Ethernet
- * @in_suspend: Flag to indicate if we're suspending/resuming
- * @ndev: The net_device for this interface
- * @dev: The platform device object for this interface
- * @dtype: The type of this device
- * @io_regs: The ioremapped registers for this interface
- * @napi : Add support NAPI for Rx
- * @rx_irq_name: The textual name of the RX IRQ from the platform data
- * @tx_irq_name: The textual name of the TX IRQ from the platform data
- * @link_irq_name: The textual name of the link IRQ from the
- * platform data if available
- * @rx_irq: The IRQ number for the RX IRQ
- * @tx_irq: The IRQ number for the TX IRQ
- * @link_irq: The IRQ number for the link IRQ if available
- * @regs_req: The resource request for the registers region
- * @phyiface_req: The resource request for the phy/switch region
- * if available
- * @phyiface_regs: The ioremapped registers for the phy/switch if available
- * @ring_base: The base pointer of the dma coherent memory for the rings
- * @ring_base_dma: The DMA mapped equivalent of ring_base
- * @tx_ring: The pointer in ring_base of the TX ring
- * @tx_ring_used: The number of slots in the TX ring which are occupied
- * @tx_ring_next_slot: The next slot to fill in the TX ring
- * @tx_ring_dma: The DMA mapped equivalent of tx_ring
- * @tx_buffers: The sk_buff mappings for the TX ring
- * @txq_lock: A lock to protect the tx_buffers tx_ring_used etc variables
- * @rx_ring: The pointer in ring_base of the RX ring
- * @rx_ring_dma: The DMA mapped equivalent of rx_ring
- * @rx_buffers: The sk_buff mappings for the RX ring
- * @next_rx_desc_read: The next RX descriptor to read from on IRQ
- * @rx_lock: A lock to protect Rx irq function
- * @msg_enable: The flags for which messages to emit
- */
-struct ks8695_priv {
- int in_suspend;
- struct net_device *ndev;
- struct device *dev;
- enum ks8695_dtype dtype;
- void __iomem *io_regs;
-
- struct napi_struct napi;
-
- const char *rx_irq_name, *tx_irq_name, *link_irq_name;
- int rx_irq, tx_irq, link_irq;
-
- struct resource *regs_req, *phyiface_req;
- void __iomem *phyiface_regs;
-
- void *ring_base;
- dma_addr_t ring_base_dma;
-
- struct tx_ring_desc *tx_ring;
- int tx_ring_used;
- int tx_ring_next_slot;
- dma_addr_t tx_ring_dma;
- struct ks8695_skbuff tx_buffers[MAX_TX_DESC];
- spinlock_t txq_lock;
-
- struct rx_ring_desc *rx_ring;
- dma_addr_t rx_ring_dma;
- struct ks8695_skbuff rx_buffers[MAX_RX_DESC];
- int next_rx_desc_read;
- spinlock_t rx_lock;
-
- int msg_enable;
-};
-
-/* Register access */
-
-/**
- * ks8695_readreg - Read from a KS8695 ethernet register
- * @ksp: The device to read from
- * @reg: The register to read
- */
-static inline u32
-ks8695_readreg(struct ks8695_priv *ksp, int reg)
-{
- return readl(ksp->io_regs + reg);
-}
-
-/**
- * ks8695_writereg - Write to a KS8695 ethernet register
- * @ksp: The device to write to
- * @reg: The register to write
- * @value: The value to write to the register
- */
-static inline void
-ks8695_writereg(struct ks8695_priv *ksp, int reg, u32 value)
-{
- writel(value, ksp->io_regs + reg);
-}
-
-/* Utility functions */
-
-/**
- * ks8695_port_type - Retrieve port-type as user-friendly string
- * @ksp: The device to return the type for
- *
- * Returns a string indicating which of the WAN, LAN or HPNA
- * ports this device is likely to represent.
- */
-static const char *
-ks8695_port_type(struct ks8695_priv *ksp)
-{
- switch (ksp->dtype) {
- case KS8695_DTYPE_LAN:
- return "LAN";
- case KS8695_DTYPE_WAN:
- return "WAN";
- case KS8695_DTYPE_HPNA:
- return "HPNA";
- }
-
- return "UNKNOWN";
-}
-
-/**
- * ks8695_update_mac - Update the MAC registers in the device
- * @ksp: The device to update
- *
- * Updates the MAC registers in the KS8695 device from the address in the
- * net_device structure associated with this interface.
- */
-static void
-ks8695_update_mac(struct ks8695_priv *ksp)
-{
- /* Update the HW with the MAC from the net_device */
- struct net_device *ndev = ksp->ndev;
- u32 machigh, maclow;
-
- maclow = ((ndev->dev_addr[2] << 24) | (ndev->dev_addr[3] << 16) |
- (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5] << 0));
- machigh = ((ndev->dev_addr[0] << 8) | (ndev->dev_addr[1] << 0));
-
- ks8695_writereg(ksp, KS8695_MAL, maclow);
- ks8695_writereg(ksp, KS8695_MAH, machigh);
-
-}
-
-/**
- * ks8695_refill_rxbuffers - Re-fill the RX buffer ring
- * @ksp: The device to refill
- *
- * Iterates the RX ring of the device looking for empty slots.
- * For each empty slot, we allocate and map a new SKB and give it
- * to the hardware.
- * This can be called from interrupt context safely.
- */
-static void
-ks8695_refill_rxbuffers(struct ks8695_priv *ksp)
-{
- /* Run around the RX ring, filling in any missing sk_buff's */
- int buff_n;
-
- for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) {
- if (!ksp->rx_buffers[buff_n].skb) {
- struct sk_buff *skb =
- netdev_alloc_skb(ksp->ndev, MAX_RXBUF_SIZE);
- dma_addr_t mapping;
-
- ksp->rx_buffers[buff_n].skb = skb;
- if (skb == NULL) {
- /* Failed to allocate one, perhaps
- * we'll try again later.
- */
- break;
- }
-
- mapping = dma_map_single(ksp->dev, skb->data,
- MAX_RXBUF_SIZE,
- DMA_FROM_DEVICE);
- if (unlikely(dma_mapping_error(ksp->dev, mapping))) {
- /* Failed to DMA map this SKB, try later */
- dev_kfree_skb_irq(skb);
- ksp->rx_buffers[buff_n].skb = NULL;
- break;
- }
- ksp->rx_buffers[buff_n].dma_ptr = mapping;
- ksp->rx_buffers[buff_n].length = MAX_RXBUF_SIZE;
-
- /* Record this into the DMA ring */
- ksp->rx_ring[buff_n].data_ptr = cpu_to_le32(mapping);
- ksp->rx_ring[buff_n].length =
- cpu_to_le32(MAX_RXBUF_SIZE);
-
- wmb();
-
- /* And give ownership over to the hardware */
- ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN);
- }
- }
-}
-
-/* Maximum number of multicast addresses which the KS8695 HW supports */
-#define KS8695_NR_ADDRESSES 16
-
-/**
- * ks8695_init_partial_multicast - Init the mcast addr registers
- * @ksp: The device to initialise
- * @addr: The multicast address list to use
- * @nr_addr: The number of addresses in the list
- *
- * This routine is a helper for ks8695_set_multicast - it writes
- * the additional-address registers in the KS8695 ethernet device
- * and cleans up any others left behind.
- */
-static void
-ks8695_init_partial_multicast(struct ks8695_priv *ksp,
- struct net_device *ndev)
-{
- u32 low, high;
- int i;
- struct netdev_hw_addr *ha;
-
- i = 0;
- netdev_for_each_mc_addr(ha, ndev) {
- /* Ran out of space in chip? */
- BUG_ON(i == KS8695_NR_ADDRESSES);
-
- low = (ha->addr[2] << 24) | (ha->addr[3] << 16) |
- (ha->addr[4] << 8) | (ha->addr[5]);
- high = (ha->addr[0] << 8) | (ha->addr[1]);
-
- ks8695_writereg(ksp, KS8695_AAL_(i), low);
- ks8695_writereg(ksp, KS8695_AAH_(i), AAH_E | high);
- i++;
- }
-
- /* Clear the remaining Additional Station Addresses */
- for (; i < KS8695_NR_ADDRESSES; i++) {
- ks8695_writereg(ksp, KS8695_AAL_(i), 0);
- ks8695_writereg(ksp, KS8695_AAH_(i), 0);
- }
-}
-
-/* Interrupt handling */
-
-/**
- * ks8695_tx_irq - Transmit IRQ handler
- * @irq: The IRQ which went off (ignored)
- * @dev_id: The net_device for the interrupt
- *
- * Process the TX ring, clearing out any transmitted slots.
- * Allows the net_device to pass us new packets once slots are
- * freed.
- */
-static irqreturn_t
-ks8695_tx_irq(int irq, void *dev_id)
-{
- struct net_device *ndev = (struct net_device *)dev_id;
- struct ks8695_priv *ksp = netdev_priv(ndev);
- int buff_n;
-
- for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) {
- if (ksp->tx_buffers[buff_n].skb &&
- !(ksp->tx_ring[buff_n].owner & cpu_to_le32(TDES_OWN))) {
- rmb();
- /* An SKB which is not owned by HW is present */
- /* Update the stats for the net_device */
- ndev->stats.tx_packets++;
- ndev->stats.tx_bytes += ksp->tx_buffers[buff_n].length;
-
- /* Free the packet from the ring */
- ksp->tx_ring[buff_n].data_ptr = 0;
-
- /* Free the sk_buff */
- dma_unmap_single(ksp->dev,
- ksp->tx_buffers[buff_n].dma_ptr,
- ksp->tx_buffers[buff_n].length,
- DMA_TO_DEVICE);
- dev_consume_skb_irq(ksp->tx_buffers[buff_n].skb);
- ksp->tx_buffers[buff_n].skb = NULL;
- ksp->tx_ring_used--;
- }
- }
-
- netif_wake_queue(ndev);
-
- return IRQ_HANDLED;
-}
-
-/**
- * ks8695_get_rx_enable_bit - Get rx interrupt enable/status bit
- * @ksp: Private data for the KS8695 Ethernet
- *
- * For KS8695 document:
- * Interrupt Enable Register (offset 0xE204)
- * Bit29 : WAN MAC Receive Interrupt Enable
- * Bit16 : LAN MAC Receive Interrupt Enable
- * Interrupt Status Register (Offset 0xF208)
- * Bit29: WAN MAC Receive Status
- * Bit16: LAN MAC Receive Status
- * So, this Rx interrupt enable/status bit number is equal
- * as Rx IRQ number.
- */
-static inline u32 ks8695_get_rx_enable_bit(struct ks8695_priv *ksp)
-{
- return ksp->rx_irq;
-}
-
-/**
- * ks8695_rx_irq - Receive IRQ handler
- * @irq: The IRQ which went off (ignored)
- * @dev_id: The net_device for the interrupt
- *
- * Inform NAPI that packet reception needs to be scheduled
- */
-
-static irqreturn_t
-ks8695_rx_irq(int irq, void *dev_id)
-{
- struct net_device *ndev = (struct net_device *)dev_id;
- struct ks8695_priv *ksp = netdev_priv(ndev);
-
- spin_lock(&ksp->rx_lock);
-
- if (napi_schedule_prep(&ksp->napi)) {
- unsigned long status = readl(KS8695_IRQ_VA + KS8695_INTEN);
- unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp);
- /*disable rx interrupt*/
- status &= ~mask_bit;
- writel(status , KS8695_IRQ_VA + KS8695_INTEN);
- __napi_schedule(&ksp->napi);
- }
-
- spin_unlock(&ksp->rx_lock);
- return IRQ_HANDLED;
-}
-
-/**
- * ks8695_rx - Receive packets called by NAPI poll method
- * @ksp: Private data for the KS8695 Ethernet
- * @budget: Number of packets allowed to process
- */
-static int ks8695_rx(struct ks8695_priv *ksp, int budget)
-{
- struct net_device *ndev = ksp->ndev;
- struct sk_buff *skb;
- int buff_n;
- u32 flags;
- int pktlen;
- int received = 0;
-
- buff_n = ksp->next_rx_desc_read;
- while (received < budget
- && ksp->rx_buffers[buff_n].skb
- && (!(ksp->rx_ring[buff_n].status &
- cpu_to_le32(RDES_OWN)))) {
- rmb();
- flags = le32_to_cpu(ksp->rx_ring[buff_n].status);
-
- /* Found an SKB which we own, this means we
- * received a packet
- */
- if ((flags & (RDES_FS | RDES_LS)) !=
- (RDES_FS | RDES_LS)) {
- /* This packet is not the first and
- * the last segment. Therefore it is
- * a "spanning" packet and we can't
- * handle it
- */
- goto rx_failure;
- }
-
- if (flags & (RDES_ES | RDES_RE)) {
- /* It's an error packet */
- ndev->stats.rx_errors++;
- if (flags & RDES_TL)
- ndev->stats.rx_length_errors++;
- if (flags & RDES_RF)
- ndev->stats.rx_length_errors++;
- if (flags & RDES_CE)
- ndev->stats.rx_crc_errors++;
- if (flags & RDES_RE)
- ndev->stats.rx_missed_errors++;
-
- goto rx_failure;
- }
-
- pktlen = flags & RDES_FLEN;
- pktlen -= 4; /* Drop the CRC */
-
- /* Retrieve the sk_buff */
- skb = ksp->rx_buffers[buff_n].skb;
-
- /* Clear it from the ring */
- ksp->rx_buffers[buff_n].skb = NULL;
- ksp->rx_ring[buff_n].data_ptr = 0;
-
- /* Unmap the SKB */
- dma_unmap_single(ksp->dev,
- ksp->rx_buffers[buff_n].dma_ptr,
- ksp->rx_buffers[buff_n].length,
- DMA_FROM_DEVICE);
-
- /* Relinquish the SKB to the network layer */
- skb_put(skb, pktlen);
- skb->protocol = eth_type_trans(skb, ndev);
- napi_gro_receive(&ksp->napi, skb);
-
- /* Record stats */
- ndev->stats.rx_packets++;
- ndev->stats.rx_bytes += pktlen;
- goto rx_finished;
-
-rx_failure:
- /* This ring entry is an error, but we can
- * re-use the skb
- */
- /* Give the ring entry back to the hardware */
- ksp->rx_ring[buff_n].status = cpu_to_le32(RDES_OWN);
-rx_finished:
- received++;
- buff_n = (buff_n + 1) & MAX_RX_DESC_MASK;
- }
-
- /* And note which RX descriptor we last did */
- ksp->next_rx_desc_read = buff_n;
-
- /* And refill the buffers */
- ks8695_refill_rxbuffers(ksp);
-
- /* Kick the RX DMA engine, in case it became suspended */
- ks8695_writereg(ksp, KS8695_DRSC, 0);
-
- return received;
-}
-
-
-/**
- * ks8695_poll - Receive packet by NAPI poll method
- * @ksp: Private data for the KS8695 Ethernet
- * @budget: The remaining number packets for network subsystem
- *
- * Invoked by the network core when it requests for new
- * packets from the driver
- */
-static int ks8695_poll(struct napi_struct *napi, int budget)
-{
- struct ks8695_priv *ksp = container_of(napi, struct ks8695_priv, napi);
- unsigned long isr = readl(KS8695_IRQ_VA + KS8695_INTEN);
- unsigned long mask_bit = 1 << ks8695_get_rx_enable_bit(ksp);
- int work_done;
-
- work_done = ks8695_rx(ksp, budget);
-
- if (work_done < budget && napi_complete_done(napi, work_done)) {
- unsigned long flags;
-
- spin_lock_irqsave(&ksp->rx_lock, flags);
- /* enable rx interrupt */
- writel(isr | mask_bit, KS8695_IRQ_VA + KS8695_INTEN);
- spin_unlock_irqrestore(&ksp->rx_lock, flags);
- }
- return work_done;
-}
-
-/**
- * ks8695_link_irq - Link change IRQ handler
- * @irq: The IRQ which went off (ignored)
- * @dev_id: The net_device for the interrupt
- *
- * The WAN interface can generate an IRQ when the link changes,
- * report this to the net layer and the user.
- */
-static irqreturn_t
-ks8695_link_irq(int irq, void *dev_id)
-{
- struct net_device *ndev = (struct net_device *)dev_id;
- struct ks8695_priv *ksp = netdev_priv(ndev);
- u32 ctrl;
-
- ctrl = readl(ksp->phyiface_regs + KS8695_WMC);
- if (ctrl & WMC_WLS) {
- netif_carrier_on(ndev);
- if (netif_msg_link(ksp))
- dev_info(ksp->dev,
- "%s: Link is now up (10%sMbps/%s-duplex)\n",
- ndev->name,
- (ctrl & WMC_WSS) ? "0" : "",
- (ctrl & WMC_WDS) ? "Full" : "Half");
- } else {
- netif_carrier_off(ndev);
- if (netif_msg_link(ksp))
- dev_info(ksp->dev, "%s: Link is now down.\n",
- ndev->name);
- }
-
- return IRQ_HANDLED;
-}
-
-
-/* KS8695 Device functions */
-
-/**
- * ks8695_reset - Reset a KS8695 ethernet interface
- * @ksp: The interface to reset
- *
- * Perform an engine reset of the interface and re-program it
- * with sensible defaults.
- */
-static void
-ks8695_reset(struct ks8695_priv *ksp)
-{
- int reset_timeout = watchdog;
- /* Issue the reset via the TX DMA control register */
- ks8695_writereg(ksp, KS8695_DTXC, DTXC_TRST);
- while (reset_timeout--) {
- if (!(ks8695_readreg(ksp, KS8695_DTXC) & DTXC_TRST))
- break;
- msleep(1);
- }
-
- if (reset_timeout < 0) {
- dev_crit(ksp->dev,
- "Timeout waiting for DMA engines to reset\n");
- /* And blithely carry on */
- }
-
- /* Definitely wait long enough before attempting to program
- * the engines
- */
- msleep(10);
-
- /* RX: unicast and broadcast */
- ks8695_writereg(ksp, KS8695_DRXC, DRXC_RU | DRXC_RB);
- /* TX: pad and add CRC */
- ks8695_writereg(ksp, KS8695_DTXC, DTXC_TEP | DTXC_TAC);
-}
-
-/**
- * ks8695_shutdown - Shut down a KS8695 ethernet interface
- * @ksp: The interface to shut down
- *
- * This disables packet RX/TX, cleans up IRQs, drains the rings,
- * and basically places the interface into a clean shutdown
- * state.
- */
-static void
-ks8695_shutdown(struct ks8695_priv *ksp)
-{
- u32 ctrl;
- int buff_n;
-
- /* Disable packet transmission */
- ctrl = ks8695_readreg(ksp, KS8695_DTXC);
- ks8695_writereg(ksp, KS8695_DTXC, ctrl & ~DTXC_TE);
-
- /* Disable packet reception */
- ctrl = ks8695_readreg(ksp, KS8695_DRXC);
- ks8695_writereg(ksp, KS8695_DRXC, ctrl & ~DRXC_RE);
-
- /* Release the IRQs */
- free_irq(ksp->rx_irq, ksp->ndev);
- free_irq(ksp->tx_irq, ksp->ndev);
- if (ksp->link_irq != -1)
- free_irq(ksp->link_irq, ksp->ndev);
-
- /* Throw away any pending TX packets */
- for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) {
- if (ksp->tx_buffers[buff_n].skb) {
- /* Remove this SKB from the TX ring */
- ksp->tx_ring[buff_n].owner = 0;
- ksp->tx_ring[buff_n].status = 0;
- ksp->tx_ring[buff_n].data_ptr = 0;
-
- /* Unmap and bin this SKB */
- dma_unmap_single(ksp->dev,
- ksp->tx_buffers[buff_n].dma_ptr,
- ksp->tx_buffers[buff_n].length,
- DMA_TO_DEVICE);
- dev_kfree_skb_irq(ksp->tx_buffers[buff_n].skb);
- ksp->tx_buffers[buff_n].skb = NULL;
- }
- }
-
- /* Purge the RX buffers */
- for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) {
- if (ksp->rx_buffers[buff_n].skb) {
- /* Remove the SKB from the RX ring */
- ksp->rx_ring[buff_n].status = 0;
- ksp->rx_ring[buff_n].data_ptr = 0;
-
- /* Unmap and bin the SKB */
- dma_unmap_single(ksp->dev,
- ksp->rx_buffers[buff_n].dma_ptr,
- ksp->rx_buffers[buff_n].length,
- DMA_FROM_DEVICE);
- dev_kfree_skb_irq(ksp->rx_buffers[buff_n].skb);
- ksp->rx_buffers[buff_n].skb = NULL;
- }
- }
-}
-
-
-/**
- * ks8695_setup_irq - IRQ setup helper function
- * @irq: The IRQ number to claim
- * @irq_name: The name to give the IRQ claimant
- * @handler: The function to call to handle the IRQ
- * @ndev: The net_device to pass in as the dev_id argument to the handler
- *
- * Return 0 on success.
- */
-static int
-ks8695_setup_irq(int irq, const char *irq_name,
- irq_handler_t handler, struct net_device *ndev)
-{
- int ret;
-
- ret = request_irq(irq, handler, IRQF_SHARED, irq_name, ndev);
-
- if (ret) {
- dev_err(&ndev->dev, "failure to request IRQ %d\n", irq);
- return ret;
- }
-
- return 0;
-}
-
-/**
- * ks8695_init_net - Initialise a KS8695 ethernet interface
- * @ksp: The interface to initialise
- *
- * This routine fills the RX ring, initialises the DMA engines,
- * allocates the IRQs and then starts the packet TX and RX
- * engines.
- */
-static int
-ks8695_init_net(struct ks8695_priv *ksp)
-{
- int ret;
- u32 ctrl;
-
- ks8695_refill_rxbuffers(ksp);
-
- /* Initialise the DMA engines */
- ks8695_writereg(ksp, KS8695_RDLB, (u32) ksp->rx_ring_dma);
- ks8695_writereg(ksp, KS8695_TDLB, (u32) ksp->tx_ring_dma);
-
- /* Request the IRQs */
- ret = ks8695_setup_irq(ksp->rx_irq, ksp->rx_irq_name,
- ks8695_rx_irq, ksp->ndev);
- if (ret)
- return ret;
- ret = ks8695_setup_irq(ksp->tx_irq, ksp->tx_irq_name,
- ks8695_tx_irq, ksp->ndev);
- if (ret)
- return ret;
- if (ksp->link_irq != -1) {
- ret = ks8695_setup_irq(ksp->link_irq, ksp->link_irq_name,
- ks8695_link_irq, ksp->ndev);
- if (ret)
- return ret;
- }
-
- /* Set up the ring indices */
- ksp->next_rx_desc_read = 0;
- ksp->tx_ring_next_slot = 0;
- ksp->tx_ring_used = 0;
-
- /* Bring up transmission */
- ctrl = ks8695_readreg(ksp, KS8695_DTXC);
- /* Enable packet transmission */
- ks8695_writereg(ksp, KS8695_DTXC, ctrl | DTXC_TE);
-
- /* Bring up the reception */
- ctrl = ks8695_readreg(ksp, KS8695_DRXC);
- /* Enable packet reception */
- ks8695_writereg(ksp, KS8695_DRXC, ctrl | DRXC_RE);
- /* And start the DMA engine */
- ks8695_writereg(ksp, KS8695_DRSC, 0);
-
- /* All done */
- return 0;
-}
-
-/**
- * ks8695_release_device - HW resource release for KS8695 e-net
- * @ksp: The device to be freed
- *
- * This unallocates io memory regions, dma-coherent regions etc
- * which were allocated in ks8695_probe.
- */
-static void
-ks8695_release_device(struct ks8695_priv *ksp)
-{
- /* Unmap the registers */
- iounmap(ksp->io_regs);
- if (ksp->phyiface_regs)
- iounmap(ksp->phyiface_regs);
-
- /* And release the request */
- release_resource(ksp->regs_req);
- kfree(ksp->regs_req);
- if (ksp->phyiface_req) {
- release_resource(ksp->phyiface_req);
- kfree(ksp->phyiface_req);
- }
-
- /* Free the ring buffers */
- dma_free_coherent(ksp->dev, RING_DMA_SIZE,
- ksp->ring_base, ksp->ring_base_dma);
-}
-
-/* Ethtool support */
-
-/**
- * ks8695_get_msglevel - Get the messages enabled for emission
- * @ndev: The network device to read from
- */
-static u32
-ks8695_get_msglevel(struct net_device *ndev)
-{
- struct ks8695_priv *ksp = netdev_priv(ndev);
-
- return ksp->msg_enable;
-}
-
-/**
- * ks8695_set_msglevel - Set the messages enabled for emission
- * @ndev: The network device to configure
- * @value: The messages to set for emission
- */
-static void
-ks8695_set_msglevel(struct net_device *ndev, u32 value)
-{
- struct ks8695_priv *ksp = netdev_priv(ndev);
-
- ksp->msg_enable = value;
-}
-
-/**
- * ks8695_wan_get_link_ksettings - Get device-specific settings.
- * @ndev: The network device to read settings from
- * @cmd: The ethtool structure to read into
- */
-static int
-ks8695_wan_get_link_ksettings(struct net_device *ndev,
- struct ethtool_link_ksettings *cmd)
-{
- struct ks8695_priv *ksp = netdev_priv(ndev);
- u32 ctrl;
- u32 supported, advertising;
-
- /* All ports on the KS8695 support these... */
- supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
- SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
- SUPPORTED_TP | SUPPORTED_MII);
-
- advertising = ADVERTISED_TP | ADVERTISED_MII;
- cmd->base.port = PORT_MII;
- supported |= (SUPPORTED_Autoneg | SUPPORTED_Pause);
- cmd->base.phy_address = 0;
-
- ctrl = readl(ksp->phyiface_regs + KS8695_WMC);
- if ((ctrl & WMC_WAND) == 0) {
- /* auto-negotiation is enabled */
- advertising |= ADVERTISED_Autoneg;
- if (ctrl & WMC_WANA100F)
- advertising |= ADVERTISED_100baseT_Full;
- if (ctrl & WMC_WANA100H)
- advertising |= ADVERTISED_100baseT_Half;
- if (ctrl & WMC_WANA10F)
- advertising |= ADVERTISED_10baseT_Full;
- if (ctrl & WMC_WANA10H)
- advertising |= ADVERTISED_10baseT_Half;
- if (ctrl & WMC_WANAP)
- advertising |= ADVERTISED_Pause;
- cmd->base.autoneg = AUTONEG_ENABLE;
-
- cmd->base.speed = (ctrl & WMC_WSS) ? SPEED_100 : SPEED_10;
- cmd->base.duplex = (ctrl & WMC_WDS) ?
- DUPLEX_FULL : DUPLEX_HALF;
- } else {
- /* auto-negotiation is disabled */
- cmd->base.autoneg = AUTONEG_DISABLE;
-
- cmd->base.speed = (ctrl & WMC_WANF100) ?
- SPEED_100 : SPEED_10;
- cmd->base.duplex = (ctrl & WMC_WANFF) ?
- DUPLEX_FULL : DUPLEX_HALF;
- }
-
- ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
- supported);
- ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
- advertising);
-
- return 0;
-}
-
-/**
- * ks8695_wan_set_link_ksettings - Set device-specific settings.
- * @ndev: The network device to configure
- * @cmd: The settings to configure
- */
-static int
-ks8695_wan_set_link_ksettings(struct net_device *ndev,
- const struct ethtool_link_ksettings *cmd)
-{
- struct ks8695_priv *ksp = netdev_priv(ndev);
- u32 ctrl;
- u32 advertising;
-
- ethtool_convert_link_mode_to_legacy_u32(&advertising,
- cmd->link_modes.advertising);
-
- if ((cmd->base.speed != SPEED_10) && (cmd->base.speed != SPEED_100))
- return -EINVAL;
- if ((cmd->base.duplex != DUPLEX_HALF) &&
- (cmd->base.duplex != DUPLEX_FULL))
- return -EINVAL;
- if (cmd->base.port != PORT_MII)
- return -EINVAL;
- if ((cmd->base.autoneg != AUTONEG_DISABLE) &&
- (cmd->base.autoneg != AUTONEG_ENABLE))
- return -EINVAL;
-
- if (cmd->base.autoneg == AUTONEG_ENABLE) {
- if ((advertising & (ADVERTISED_10baseT_Half |
- ADVERTISED_10baseT_Full |
- ADVERTISED_100baseT_Half |
- ADVERTISED_100baseT_Full)) == 0)
- return -EINVAL;
-
- ctrl = readl(ksp->phyiface_regs + KS8695_WMC);
-
- ctrl &= ~(WMC_WAND | WMC_WANA100F | WMC_WANA100H |
- WMC_WANA10F | WMC_WANA10H);
- if (advertising & ADVERTISED_100baseT_Full)
- ctrl |= WMC_WANA100F;
- if (advertising & ADVERTISED_100baseT_Half)
- ctrl |= WMC_WANA100H;
- if (advertising & ADVERTISED_10baseT_Full)
- ctrl |= WMC_WANA10F;
- if (advertising & ADVERTISED_10baseT_Half)
- ctrl |= WMC_WANA10H;
-
- /* force a re-negotiation */
- ctrl |= WMC_WANR;
- writel(ctrl, ksp->phyiface_regs + KS8695_WMC);
- } else {
- ctrl = readl(ksp->phyiface_regs + KS8695_WMC);
-
- /* disable auto-negotiation */
- ctrl |= WMC_WAND;
- ctrl &= ~(WMC_WANF100 | WMC_WANFF);
-
- if (cmd->base.speed == SPEED_100)
- ctrl |= WMC_WANF100;
- if (cmd->base.duplex == DUPLEX_FULL)
- ctrl |= WMC_WANFF;
-
- writel(ctrl, ksp->phyiface_regs + KS8695_WMC);
- }
-
- return 0;
-}
-
-/**
- * ks8695_wan_nwayreset - Restart the autonegotiation on the port.
- * @ndev: The network device to restart autoneotiation on
- */
-static int
-ks8695_wan_nwayreset(struct net_device *ndev)
-{
- struct ks8695_priv *ksp = netdev_priv(ndev);
- u32 ctrl;
-
- ctrl = readl(ksp->phyiface_regs + KS8695_WMC);
-
- if ((ctrl & WMC_WAND) == 0)
- writel(ctrl | WMC_WANR,
- ksp->phyiface_regs + KS8695_WMC);
- else
- /* auto-negotiation not enabled */
- return -EINVAL;
-
- return 0;
-}
-
-/**
- * ks8695_wan_get_pause - Retrieve network pause/flow-control advertising
- * @ndev: The device to retrieve settings from
- * @param: The structure to fill out with the information
- */
-static void
-ks8695_wan_get_pause(struct net_device *ndev, struct ethtool_pauseparam *param)
-{
- struct ks8695_priv *ksp = netdev_priv(ndev);
- u32 ctrl;
-
- ctrl = readl(ksp->phyiface_regs + KS8695_WMC);
-
- /* advertise Pause */
- param->autoneg = (ctrl & WMC_WANAP);
-
- /* current Rx Flow-control */
- ctrl = ks8695_readreg(ksp, KS8695_DRXC);
- param->rx_pause = (ctrl & DRXC_RFCE);
-
- /* current Tx Flow-control */
- ctrl = ks8695_readreg(ksp, KS8695_DTXC);
- param->tx_pause = (ctrl & DTXC_TFCE);
-}
-
-/**
- * ks8695_get_drvinfo - Retrieve driver information
- * @ndev: The network device to retrieve info about
- * @info: The info structure to fill out.
- */
-static void
-ks8695_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info)
-{
- strlcpy(info->driver, MODULENAME, sizeof(info->driver));
- strlcpy(info->version, MODULEVERSION, sizeof(info->version));
- strlcpy(info->bus_info, dev_name(ndev->dev.parent),
- sizeof(info->bus_info));
-}
-
-static const struct ethtool_ops ks8695_ethtool_ops = {
- .get_msglevel = ks8695_get_msglevel,
- .set_msglevel = ks8695_set_msglevel,
- .get_drvinfo = ks8695_get_drvinfo,
-};
-
-static const struct ethtool_ops ks8695_wan_ethtool_ops = {
- .get_msglevel = ks8695_get_msglevel,
- .set_msglevel = ks8695_set_msglevel,
- .nway_reset = ks8695_wan_nwayreset,
- .get_link = ethtool_op_get_link,
- .get_pauseparam = ks8695_wan_get_pause,
- .get_drvinfo = ks8695_get_drvinfo,
- .get_link_ksettings = ks8695_wan_get_link_ksettings,
- .set_link_ksettings = ks8695_wan_set_link_ksettings,
-};
-
-/* Network device interface functions */
-
-/**
- * ks8695_set_mac - Update MAC in net dev and HW
- * @ndev: The network device to update
- * @addr: The new MAC address to set
- */
-static int
-ks8695_set_mac(struct net_device *ndev, void *addr)
-{
- struct ks8695_priv *ksp = netdev_priv(ndev);
- struct sockaddr *address = addr;
-
- if (!is_valid_ether_addr(address->sa_data))
- return -EADDRNOTAVAIL;
-
- memcpy(ndev->dev_addr, address->sa_data, ndev->addr_len);
-
- ks8695_update_mac(ksp);
-
- dev_dbg(ksp->dev, "%s: Updated MAC address to %pM\n",
- ndev->name, ndev->dev_addr);
-
- return 0;
-}
-
-/**
- * ks8695_set_multicast - Set up the multicast behaviour of the interface
- * @ndev: The net_device to configure
- *
- * This routine, called by the net layer, configures promiscuity
- * and multicast reception behaviour for the interface.
- */
-static void
-ks8695_set_multicast(struct net_device *ndev)
-{
- struct ks8695_priv *ksp = netdev_priv(ndev);
- u32 ctrl;
-
- ctrl = ks8695_readreg(ksp, KS8695_DRXC);
-
- if (ndev->flags & IFF_PROMISC) {
- /* enable promiscuous mode */
- ctrl |= DRXC_RA;
- } else if (ndev->flags & ~IFF_PROMISC) {
- /* disable promiscuous mode */
- ctrl &= ~DRXC_RA;
- }
-
- if (ndev->flags & IFF_ALLMULTI) {
- /* enable all multicast mode */
- ctrl |= DRXC_RM;
- } else if (netdev_mc_count(ndev) > KS8695_NR_ADDRESSES) {
- /* more specific multicast addresses than can be
- * handled in hardware
- */
- ctrl |= DRXC_RM;
- } else {
- /* enable specific multicasts */
- ctrl &= ~DRXC_RM;
- ks8695_init_partial_multicast(ksp, ndev);
- }
-
- ks8695_writereg(ksp, KS8695_DRXC, ctrl);
-}
-
-/**
- * ks8695_timeout - Handle a network tx/rx timeout.
- * @ndev: The net_device which timed out.
- *
- * A network transaction timed out, reset the device.
- */
-static void
-ks8695_timeout(struct net_device *ndev)
-{
- struct ks8695_priv *ksp = netdev_priv(ndev);
-
- netif_stop_queue(ndev);
- ks8695_shutdown(ksp);
-
- ks8695_reset(ksp);
-
- ks8695_update_mac(ksp);
-
- /* We ignore the return from this since it managed to init
- * before it probably will be okay to init again.
- */
- ks8695_init_net(ksp);
-
- /* Reconfigure promiscuity etc */
- ks8695_set_multicast(ndev);
-
- /* And start the TX queue once more */
- netif_start_queue(ndev);
-}
-
-/**
- * ks8695_start_xmit - Start a packet transmission
- * @skb: The packet to transmit
- * @ndev: The network device to send the packet on
- *
- * This routine, called by the net layer, takes ownership of the
- * sk_buff and adds it to the TX ring. It then kicks the TX DMA
- * engine to ensure transmission begins.
- */
-static netdev_tx_t
-ks8695_start_xmit(struct sk_buff *skb, struct net_device *ndev)
-{
- struct ks8695_priv *ksp = netdev_priv(ndev);
- int buff_n;
- dma_addr_t dmap;
-
- spin_lock_irq(&ksp->txq_lock);
-
- if (ksp->tx_ring_used == MAX_TX_DESC) {
- /* Somehow we got entered when we have no room */
- spin_unlock_irq(&ksp->txq_lock);
- return NETDEV_TX_BUSY;
- }
-
- buff_n = ksp->tx_ring_next_slot;
-
- BUG_ON(ksp->tx_buffers[buff_n].skb);
-
- dmap = dma_map_single(ksp->dev, skb->data, skb->len, DMA_TO_DEVICE);
- if (unlikely(dma_mapping_error(ksp->dev, dmap))) {
- /* Failed to DMA map this SKB, give it back for now */
- spin_unlock_irq(&ksp->txq_lock);
- dev_dbg(ksp->dev, "%s: Could not map DMA memory for "\
- "transmission, trying later\n", ndev->name);
- return NETDEV_TX_BUSY;
- }
-
- ksp->tx_buffers[buff_n].dma_ptr = dmap;
- /* Mapped okay, store the buffer pointer and length for later */
- ksp->tx_buffers[buff_n].skb = skb;
- ksp->tx_buffers[buff_n].length = skb->len;
-
- /* Fill out the TX descriptor */
- ksp->tx_ring[buff_n].data_ptr =
- cpu_to_le32(ksp->tx_buffers[buff_n].dma_ptr);
- ksp->tx_ring[buff_n].status =
- cpu_to_le32(TDES_IC | TDES_FS | TDES_LS |
- (skb->len & TDES_TBS));
-
- wmb();
-
- /* Hand it over to the hardware */
- ksp->tx_ring[buff_n].owner = cpu_to_le32(TDES_OWN);
-
- if (++ksp->tx_ring_used == MAX_TX_DESC)
- netif_stop_queue(ndev);
-
- /* Kick the TX DMA in case it decided to go IDLE */
- ks8695_writereg(ksp, KS8695_DTSC, 0);
-
- /* And update the next ring slot */
- ksp->tx_ring_next_slot = (buff_n + 1) & MAX_TX_DESC_MASK;
-
- spin_unlock_irq(&ksp->txq_lock);
- return NETDEV_TX_OK;
-}
-
-/**
- * ks8695_stop - Stop (shutdown) a KS8695 ethernet interface
- * @ndev: The net_device to stop
- *
- * This disables the TX queue and cleans up a KS8695 ethernet
- * device.
- */
-static int
-ks8695_stop(struct net_device *ndev)
-{
- struct ks8695_priv *ksp = netdev_priv(ndev);
-
- netif_stop_queue(ndev);
- napi_disable(&ksp->napi);
-
- ks8695_shutdown(ksp);
-
- return 0;
-}
-
-/**
- * ks8695_open - Open (bring up) a KS8695 ethernet interface
- * @ndev: The net_device to open
- *
- * This resets, configures the MAC, initialises the RX ring and
- * DMA engines and starts the TX queue for a KS8695 ethernet
- * device.
- */
-static int
-ks8695_open(struct net_device *ndev)
-{
- struct ks8695_priv *ksp = netdev_priv(ndev);
- int ret;
-
- ks8695_reset(ksp);
-
- ks8695_update_mac(ksp);
-
- ret = ks8695_init_net(ksp);
- if (ret) {
- ks8695_shutdown(ksp);
- return ret;
- }
-
- napi_enable(&ksp->napi);
- netif_start_queue(ndev);
-
- return 0;
-}
-
-/* Platform device driver */
-
-/**
- * ks8695_init_switch - Init LAN switch to known good defaults.
- * @ksp: The device to initialise
- *
- * This initialises the LAN switch in the KS8695 to a known-good
- * set of defaults.
- */
-static void
-ks8695_init_switch(struct ks8695_priv *ksp)
-{
- u32 ctrl;
-
- /* Default value for SEC0 according to datasheet */
- ctrl = 0x40819e00;
-
- /* LED0 = Speed LED1 = Link/Activity */
- ctrl &= ~(SEC0_LLED1S | SEC0_LLED0S);
- ctrl |= (LLED0S_LINK | LLED1S_LINK_ACTIVITY);
-
- /* Enable Switch */
- ctrl |= SEC0_ENABLE;
-
- writel(ctrl, ksp->phyiface_regs + KS8695_SEC0);
-
- /* Defaults for SEC1 */
- writel(0x9400100, ksp->phyiface_regs + KS8695_SEC1);
-}
-
-/**
- * ks8695_init_wan_phy - Initialise the WAN PHY to sensible defaults
- * @ksp: The device to initialise
- *
- * This initialises a KS8695's WAN phy to sensible values for
- * autonegotiation etc.
- */
-static void
-ks8695_init_wan_phy(struct ks8695_priv *ksp)
-{
- u32 ctrl;
-
- /* Support auto-negotiation */
- ctrl = (WMC_WANAP | WMC_WANA100F | WMC_WANA100H |
- WMC_WANA10F | WMC_WANA10H);
-
- /* LED0 = Activity , LED1 = Link */
- ctrl |= (WLED0S_ACTIVITY | WLED1S_LINK);
-
- /* Restart Auto-negotiation */
- ctrl |= WMC_WANR;
-
- writel(ctrl, ksp->phyiface_regs + KS8695_WMC);
-
- writel(0, ksp->phyiface_regs + KS8695_WPPM);
- writel(0, ksp->phyiface_regs + KS8695_PPS);
-}
-
-static const struct net_device_ops ks8695_netdev_ops = {
- .ndo_open = ks8695_open,
- .ndo_stop = ks8695_stop,
- .ndo_start_xmit = ks8695_start_xmit,
- .ndo_tx_timeout = ks8695_timeout,
- .ndo_set_mac_address = ks8695_set_mac,
- .ndo_validate_addr = eth_validate_addr,
- .ndo_set_rx_mode = ks8695_set_multicast,
-};
-
-/**
- * ks8695_probe - Probe and initialise a KS8695 ethernet interface
- * @pdev: The platform device to probe
- *
- * Initialise a KS8695 ethernet device from platform data.
- *
- * This driver requires at least one IORESOURCE_MEM for the
- * registers and two IORESOURCE_IRQ for the RX and TX IRQs
- * respectively. It can optionally take an additional
- * IORESOURCE_MEM for the switch or phy in the case of the lan or
- * wan ports, and an IORESOURCE_IRQ for the link IRQ for the wan
- * port.
- */
-static int
-ks8695_probe(struct platform_device *pdev)
-{
- struct ks8695_priv *ksp;
- struct net_device *ndev;
- struct resource *regs_res, *phyiface_res;
- struct resource *rxirq_res, *txirq_res, *linkirq_res;
- int ret = 0;
- int buff_n;
- bool inv_mac_addr = false;
- u32 machigh, maclow;
-
- /* Initialise a net_device */
- ndev = alloc_etherdev(sizeof(struct ks8695_priv));
- if (!ndev)
- return -ENOMEM;
-
- SET_NETDEV_DEV(ndev, &pdev->dev);
-
- dev_dbg(&pdev->dev, "ks8695_probe() called\n");
-
- /* Configure our private structure a little */
- ksp = netdev_priv(ndev);
-
- ksp->dev = &pdev->dev;
- ksp->ndev = ndev;
- ksp->msg_enable = NETIF_MSG_LINK;
-
- /* Retrieve resources */
- regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- phyiface_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-
- rxirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- txirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
- linkirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 2);
-
- if (!(regs_res && rxirq_res && txirq_res)) {
- dev_err(ksp->dev, "insufficient resources\n");
- ret = -ENOENT;
- goto failure;
- }
-
- ksp->regs_req = request_mem_region(regs_res->start,
- resource_size(regs_res),
- pdev->name);
-
- if (!ksp->regs_req) {
- dev_err(ksp->dev, "cannot claim register space\n");
- ret = -EIO;
- goto failure;
- }
-
- ksp->io_regs = ioremap(regs_res->start, resource_size(regs_res));
-
- if (!ksp->io_regs) {
- dev_err(ksp->dev, "failed to ioremap registers\n");
- ret = -EINVAL;
- goto failure;
- }
-
- if (phyiface_res) {
- ksp->phyiface_req =
- request_mem_region(phyiface_res->start,
- resource_size(phyiface_res),
- phyiface_res->name);
-
- if (!ksp->phyiface_req) {
- dev_err(ksp->dev,
- "cannot claim switch register space\n");
- ret = -EIO;
- goto failure;
- }
-
- ksp->phyiface_regs = ioremap(phyiface_res->start,
- resource_size(phyiface_res));
-
- if (!ksp->phyiface_regs) {
- dev_err(ksp->dev,
- "failed to ioremap switch registers\n");
- ret = -EINVAL;
- goto failure;
- }
- }
-
- ksp->rx_irq = rxirq_res->start;
- ksp->rx_irq_name = rxirq_res->name ? rxirq_res->name : "Ethernet RX";
- ksp->tx_irq = txirq_res->start;
- ksp->tx_irq_name = txirq_res->name ? txirq_res->name : "Ethernet TX";
- ksp->link_irq = (linkirq_res ? linkirq_res->start : -1);
- ksp->link_irq_name = (linkirq_res && linkirq_res->name) ?
- linkirq_res->name : "Ethernet Link";
-
- /* driver system setup */
- ndev->netdev_ops = &ks8695_netdev_ops;
- ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
-
- netif_napi_add(ndev, &ksp->napi, ks8695_poll, NAPI_WEIGHT);
-
- /* Retrieve the default MAC addr from the chip. */
- /* The bootloader should have left it in there for us. */
-
- machigh = ks8695_readreg(ksp, KS8695_MAH);
- maclow = ks8695_readreg(ksp, KS8695_MAL);
-
- ndev->dev_addr[0] = (machigh >> 8) & 0xFF;
- ndev->dev_addr[1] = machigh & 0xFF;
- ndev->dev_addr[2] = (maclow >> 24) & 0xFF;
- ndev->dev_addr[3] = (maclow >> 16) & 0xFF;
- ndev->dev_addr[4] = (maclow >> 8) & 0xFF;
- ndev->dev_addr[5] = maclow & 0xFF;
-
- if (!is_valid_ether_addr(ndev->dev_addr))
- inv_mac_addr = true;
-
- /* In order to be efficient memory-wise, we allocate both
- * rings in one go.
- */
- ksp->ring_base = dma_alloc_coherent(&pdev->dev, RING_DMA_SIZE,
- &ksp->ring_base_dma, GFP_KERNEL);
- if (!ksp->ring_base) {
- ret = -ENOMEM;
- goto failure;
- }
-
- /* Specify the TX DMA ring buffer */
- ksp->tx_ring = ksp->ring_base;
- ksp->tx_ring_dma = ksp->ring_base_dma;
-
- /* And initialise the queue's lock */
- spin_lock_init(&ksp->txq_lock);
- spin_lock_init(&ksp->rx_lock);
-
- /* Specify the RX DMA ring buffer */
- ksp->rx_ring = ksp->ring_base + TX_RING_DMA_SIZE;
- ksp->rx_ring_dma = ksp->ring_base_dma + TX_RING_DMA_SIZE;
-
- /* Zero the descriptor rings */
- memset(ksp->tx_ring, 0, TX_RING_DMA_SIZE);
- memset(ksp->rx_ring, 0, RX_RING_DMA_SIZE);
-
- /* Build the rings */
- for (buff_n = 0; buff_n < MAX_TX_DESC; ++buff_n) {
- ksp->tx_ring[buff_n].next_desc =
- cpu_to_le32(ksp->tx_ring_dma +
- (sizeof(struct tx_ring_desc) *
- ((buff_n + 1) & MAX_TX_DESC_MASK)));
- }
-
- for (buff_n = 0; buff_n < MAX_RX_DESC; ++buff_n) {
- ksp->rx_ring[buff_n].next_desc =
- cpu_to_le32(ksp->rx_ring_dma +
- (sizeof(struct rx_ring_desc) *
- ((buff_n + 1) & MAX_RX_DESC_MASK)));
- }
-
- /* Initialise the port (physically) */
- if (ksp->phyiface_regs && ksp->link_irq == -1) {
- ks8695_init_switch(ksp);
- ksp->dtype = KS8695_DTYPE_LAN;
- ndev->ethtool_ops = &ks8695_ethtool_ops;
- } else if (ksp->phyiface_regs && ksp->link_irq != -1) {
- ks8695_init_wan_phy(ksp);
- ksp->dtype = KS8695_DTYPE_WAN;
- ndev->ethtool_ops = &ks8695_wan_ethtool_ops;
- } else {
- /* No initialisation since HPNA does not have a PHY */
- ksp->dtype = KS8695_DTYPE_HPNA;
- ndev->ethtool_ops = &ks8695_ethtool_ops;
- }
-
- /* And bring up the net_device with the net core */
- platform_set_drvdata(pdev, ndev);
- ret = register_netdev(ndev);
-
- if (ret == 0) {
- if (inv_mac_addr)
- dev_warn(ksp->dev, "%s: Invalid ethernet MAC address. Please set using ip\n",
- ndev->name);
- dev_info(ksp->dev, "ks8695 ethernet (%s) MAC: %pM\n",
- ks8695_port_type(ksp), ndev->dev_addr);
- } else {
- /* Report the failure to register the net_device */
- dev_err(ksp->dev, "ks8695net: failed to register netdev.\n");
- goto failure;
- }
-
- /* All is well */
- return 0;
-
- /* Error exit path */
-failure:
- ks8695_release_device(ksp);
- free_netdev(ndev);
-
- return ret;
-}
-
-/**
- * ks8695_drv_suspend - Suspend a KS8695 ethernet platform device.
- * @pdev: The device to suspend
- * @state: The suspend state
- *
- * This routine detaches and shuts down a KS8695 ethernet device.
- */
-static int
-ks8695_drv_suspend(struct platform_device *pdev, pm_message_t state)
-{
- struct net_device *ndev = platform_get_drvdata(pdev);
- struct ks8695_priv *ksp = netdev_priv(ndev);
-
- ksp->in_suspend = 1;
-
- if (netif_running(ndev)) {
- netif_device_detach(ndev);
- ks8695_shutdown(ksp);
- }
-
- return 0;
-}
-
-/**
- * ks8695_drv_resume - Resume a KS8695 ethernet platform device.
- * @pdev: The device to resume
- *
- * This routine re-initialises and re-attaches a KS8695 ethernet
- * device.
- */
-static int
-ks8695_drv_resume(struct platform_device *pdev)
-{
- struct net_device *ndev = platform_get_drvdata(pdev);
- struct ks8695_priv *ksp = netdev_priv(ndev);
-
- if (netif_running(ndev)) {
- ks8695_reset(ksp);
- ks8695_init_net(ksp);
- ks8695_set_multicast(ndev);
- netif_device_attach(ndev);
- }
-
- ksp->in_suspend = 0;
-
- return 0;
-}
-
-/**
- * ks8695_drv_remove - Remove a KS8695 net device on driver unload.
- * @pdev: The platform device to remove
- *
- * This unregisters and releases a KS8695 ethernet device.
- */
-static int
-ks8695_drv_remove(struct platform_device *pdev)
-{
- struct net_device *ndev = platform_get_drvdata(pdev);
- struct ks8695_priv *ksp = netdev_priv(ndev);
-
- netif_napi_del(&ksp->napi);
-
- unregister_netdev(ndev);
- ks8695_release_device(ksp);
- free_netdev(ndev);
-
- dev_dbg(&pdev->dev, "released and freed device\n");
- return 0;
-}
-
-static struct platform_driver ks8695_driver = {
- .driver = {
- .name = MODULENAME,
- },
- .probe = ks8695_probe,
- .remove = ks8695_drv_remove,
- .suspend = ks8695_drv_suspend,
- .resume = ks8695_drv_resume,
-};
-
-module_platform_driver(ks8695_driver);
-
-MODULE_AUTHOR("Simtec Electronics");
-MODULE_DESCRIPTION("Micrel KS8695 (Centaur) Ethernet driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:" MODULENAME);
-
-module_param(watchdog, int, 0400);
-MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
git.samba.org / sfrench / cifs-2.6.git / commitdiff