obj-$(CONFIG_KS8842) += ks8842.o
obj-$(CONFIG_KS8851) += ks8851.o
+ks8851-objs = ks8851_common.o ks8851_spi.o
obj-$(CONFIG_KS8851_MLL) += ks8851_mll.o
obj-$(CONFIG_KSZ884X_PCI) += ksz884x.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/* drivers/net/ethernet/micrel/ks8851.c
- *
- * Copyright 2009 Simtec Electronics
- * http://www.simtec.co.uk/
- * Ben Dooks <ben@simtec.co.uk>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#define DEBUG
-
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/cache.h>
-#include <linux/crc32.h>
-#include <linux/mii.h>
-#include <linux/eeprom_93cx6.h>
-#include <linux/regulator/consumer.h>
-
-#include <linux/spi/spi.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
-#include <linux/of_net.h>
-
-#include "ks8851.h"
-
-/**
- * struct ks8851_rxctrl - KS8851 driver rx control
- * @mchash: Multicast hash-table data.
- * @rxcr1: KS_RXCR1 register setting
- * @rxcr2: KS_RXCR2 register setting
- *
- * Representation of the settings needs to control the receive filtering
- * such as the multicast hash-filter and the receive register settings. This
- * is used to make the job of working out if the receive settings change and
- * then issuing the new settings to the worker that will send the necessary
- * commands.
- */
-struct ks8851_rxctrl {
- u16 mchash[4];
- u16 rxcr1;
- u16 rxcr2;
-};
-
-/**
- * union ks8851_tx_hdr - tx header data
- * @txb: The header as bytes
- * @txw: The header as 16bit, little-endian words
- *
- * A dual representation of the tx header data to allow
- * access to individual bytes, and to allow 16bit accesses
- * with 16bit alignment.
- */
-union ks8851_tx_hdr {
- u8 txb[6];
- __le16 txw[3];
-};
-
-/**
- * struct ks8851_net - KS8851 driver private data
- * @netdev: The network device we're bound to
- * @statelock: Lock on this structure for tx list.
- * @mii: The MII state information for the mii calls.
- * @rxctrl: RX settings for @rxctrl_work.
- * @rxctrl_work: Work queue for updating RX mode and multicast lists
- * @txq: Queue of packets for transmission.
- * @txh: Space for generating packet TX header in DMA-able data
- * @rxd: Space for receiving SPI data, in DMA-able space.
- * @txd: Space for transmitting SPI data, in DMA-able space.
- * @msg_enable: The message flags controlling driver output (see ethtool).
- * @fid: Incrementing frame id tag.
- * @rc_ier: Cached copy of KS_IER.
- * @rc_ccr: Cached copy of KS_CCR.
- * @rc_rxqcr: Cached copy of KS_RXQCR.
- * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM.
- * @vdd_reg: Optional regulator supplying the chip
- * @vdd_io: Optional digital power supply for IO
- * @gpio: Optional reset_n gpio
- * @lock: Bus access lock callback
- * @unlock: Bus access unlock callback
- * @rdreg16: 16bit register read callback
- * @wrreg16: 16bit register write callback
- * @rdfifo: FIFO read callback
- * @wrfifo: FIFO write callback
- * @start_xmit: start_xmit() implementation callback
- * @rx_skb: rx_skb() implementation callback
- * @flush_tx_work: flush_tx_work() implementation callback
- *
- * The @statelock is used to protect information in the structure which may
- * need to be accessed via several sources, such as the network driver layer
- * or one of the work queues.
- *
- * We align the buffers we may use for rx/tx to ensure that if the SPI driver
- * wants to DMA map them, it will not have any problems with data the driver
- * modifies.
- */
-struct ks8851_net {
- struct net_device *netdev;
- spinlock_t statelock;
-
- union ks8851_tx_hdr txh ____cacheline_aligned;
- u8 rxd[8];
- u8 txd[8];
-
- u32 msg_enable ____cacheline_aligned;
- u16 tx_space;
- u8 fid;
-
- u16 rc_ier;
- u16 rc_rxqcr;
- u16 rc_ccr;
-
- struct mii_if_info mii;
- struct ks8851_rxctrl rxctrl;
-
- struct work_struct rxctrl_work;
-
- struct sk_buff_head txq;
-
- struct eeprom_93cx6 eeprom;
- struct regulator *vdd_reg;
- struct regulator *vdd_io;
- int gpio;
-
- void (*lock)(struct ks8851_net *ks,
- unsigned long *flags);
- void (*unlock)(struct ks8851_net *ks,
- unsigned long *flags);
- unsigned int (*rdreg16)(struct ks8851_net *ks,
- unsigned int reg);
- void (*wrreg16)(struct ks8851_net *ks,
- unsigned int reg, unsigned int val);
- void (*rdfifo)(struct ks8851_net *ks, u8 *buff,
- unsigned int len);
- void (*wrfifo)(struct ks8851_net *ks,
- struct sk_buff *txp, bool irq);
- netdev_tx_t (*start_xmit)(struct sk_buff *skb,
- struct net_device *dev);
- void (*rx_skb)(struct ks8851_net *ks,
- struct sk_buff *skb);
- void (*flush_tx_work)(struct ks8851_net *ks);
-};
-
-/**
- * struct ks8851_net_spi - KS8851 SPI driver private data
- * @ks8851: KS8851 driver common private data
- * @lock: Lock to ensure that the device is not accessed when busy.
- * @tx_work: Work queue for tx packets
- * @spidev: The spi device we're bound to.
- * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1.
- * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2.
- *
- * The @lock ensures that the chip is protected when certain operations are
- * in progress. When the read or write packet transfer is in progress, most
- * of the chip registers are not ccessible until the transfer is finished and
- * the DMA has been de-asserted.
- */
-struct ks8851_net_spi {
- struct ks8851_net ks8851;
- struct mutex lock;
- struct work_struct tx_work;
- struct spi_device *spidev;
- struct spi_message spi_msg1;
- struct spi_message spi_msg2;
- struct spi_transfer spi_xfer1;
- struct spi_transfer spi_xfer2[2];
-};
-
-#define to_ks8851_spi(ks) container_of((ks), struct ks8851_net_spi, ks8851)
-
-static int msg_enable;
-
-/* SPI frame opcodes */
-#define KS_SPIOP_RD (0x00)
-#define KS_SPIOP_WR (0x40)
-#define KS_SPIOP_RXFIFO (0x80)
-#define KS_SPIOP_TXFIFO (0xC0)
-
-/* shift for byte-enable data */
-#define BYTE_EN(_x) ((_x) << 2)
-
-/* turn register number and byte-enable mask into data for start of packet */
-#define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6)
-
-/**
- * ks8851_lock_spi - register access lock for SPI
- * @ks: The chip state
- * @flags: Spinlock flags
- *
- * Claim chip register access lock
- */
-static void ks8851_lock_spi(struct ks8851_net *ks, unsigned long *flags)
-{
- struct ks8851_net_spi *kss = to_ks8851_spi(ks);
-
- mutex_lock(&kss->lock);
-}
-
-/**
- * ks8851_unlock_spi - register access unlock for SPI
- * @ks: The chip state
- * @flags: Spinlock flags
- *
- * Release chip register access lock
- */
-static void ks8851_unlock_spi(struct ks8851_net *ks, unsigned long *flags)
-{
- struct ks8851_net_spi *kss = to_ks8851_spi(ks);
-
- mutex_unlock(&kss->lock);
-}
-
-/**
- * ks8851_lock - register access lock
- * @ks: The chip state
- * @flags: Spinlock flags
- *
- * Claim chip register access lock
- */
-static void ks8851_lock(struct ks8851_net *ks, unsigned long *flags)
-{
- ks->lock(ks, flags);
-}
-
-/**
- * ks8851_unlock - register access unlock
- * @ks: The chip state
- * @flags: Spinlock flags
- *
- * Release chip register access lock
- */
-static void ks8851_unlock(struct ks8851_net *ks, unsigned long *flags)
-{
- ks->unlock(ks, flags);
-}
-
-/* SPI register read/write calls.
- *
- * All these calls issue SPI transactions to access the chip's registers. They
- * all require that the necessary lock is held to prevent accesses when the
- * chip is busy transferring packet data (RX/TX FIFO accesses).
- */
-
-/**
- * ks8851_wrreg16_spi - write 16bit register value to chip via SPI
- * @ks: The chip state
- * @reg: The register address
- * @val: The value to write
- *
- * Issue a write to put the value @val into the register specified in @reg.
- */
-static void ks8851_wrreg16_spi(struct ks8851_net *ks, unsigned int reg,
- unsigned int val)
-{
- struct ks8851_net_spi *kss = to_ks8851_spi(ks);
- struct spi_transfer *xfer = &kss->spi_xfer1;
- struct spi_message *msg = &kss->spi_msg1;
- __le16 txb[2];
- int ret;
-
- txb[0] = cpu_to_le16(MK_OP(reg & 2 ? 0xC : 0x03, reg) | KS_SPIOP_WR);
- txb[1] = cpu_to_le16(val);
-
- xfer->tx_buf = txb;
- xfer->rx_buf = NULL;
- xfer->len = 4;
-
- ret = spi_sync(kss->spidev, msg);
- if (ret < 0)
- netdev_err(ks->netdev, "spi_sync() failed\n");
-}
-
-/**
- * ks8851_wrreg16 - write 16bit register value to chip
- * @ks: The chip state
- * @reg: The register address
- * @val: The value to write
- *
- * Issue a write to put the value @val into the register specified in @reg.
- */
-static void ks8851_wrreg16(struct ks8851_net *ks, unsigned int reg,
- unsigned int val)
-{
- ks->wrreg16(ks, reg, val);
-}
-
-/**
- * ks8851_rdreg - issue read register command and return the data
- * @ks: The device state
- * @op: The register address and byte enables in message format.
- * @rxb: The RX buffer to return the result into
- * @rxl: The length of data expected.
- *
- * This is the low level read call that issues the necessary spi message(s)
- * to read data from the register specified in @op.
- */
-static void ks8851_rdreg(struct ks8851_net *ks, unsigned op,
- u8 *rxb, unsigned rxl)
-{
- struct ks8851_net_spi *kss = to_ks8851_spi(ks);
- struct spi_transfer *xfer;
- struct spi_message *msg;
- __le16 *txb = (__le16 *)ks->txd;
- u8 *trx = ks->rxd;
- int ret;
-
- txb[0] = cpu_to_le16(op | KS_SPIOP_RD);
-
- if (kss->spidev->master->flags & SPI_MASTER_HALF_DUPLEX) {
- msg = &kss->spi_msg2;
- xfer = kss->spi_xfer2;
-
- xfer->tx_buf = txb;
- xfer->rx_buf = NULL;
- xfer->len = 2;
-
- xfer++;
- xfer->tx_buf = NULL;
- xfer->rx_buf = trx;
- xfer->len = rxl;
- } else {
- msg = &kss->spi_msg1;
- xfer = &kss->spi_xfer1;
-
- xfer->tx_buf = txb;
- xfer->rx_buf = trx;
- xfer->len = rxl + 2;
- }
-
- ret = spi_sync(kss->spidev, msg);
- if (ret < 0)
- netdev_err(ks->netdev, "read: spi_sync() failed\n");
- else if (kss->spidev->master->flags & SPI_MASTER_HALF_DUPLEX)
- memcpy(rxb, trx, rxl);
- else
- memcpy(rxb, trx + 2, rxl);
-}
-
-/**
- * ks8851_rdreg16_spi - read 16 bit register from device via SPI
- * @ks: The chip information
- * @reg: The register address
- *
- * Read a 16bit register from the chip, returning the result
-*/
-static unsigned int ks8851_rdreg16_spi(struct ks8851_net *ks,
- unsigned int reg)
-{
- __le16 rx = 0;
-
- ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2);
- return le16_to_cpu(rx);
-}
-
-/**
- * ks8851_rdreg16 - read 16 bit register from device
- * @ks: The chip information
- * @reg: The register address
- *
- * Read a 16bit register from the chip, returning the result
- */
-static unsigned int ks8851_rdreg16(struct ks8851_net *ks,
- unsigned int reg)
-{
- return ks->rdreg16(ks, reg);
-}
-
-/**
- * ks8851_soft_reset - issue one of the soft reset to the device
- * @ks: The device state.
- * @op: The bit(s) to set in the GRR
- *
- * Issue the relevant soft-reset command to the device's GRR register
- * specified by @op.
- *
- * Note, the delays are in there as a caution to ensure that the reset
- * has time to take effect and then complete. Since the datasheet does
- * not currently specify the exact sequence, we have chosen something
- * that seems to work with our device.
- */
-static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op)
-{
- ks8851_wrreg16(ks, KS_GRR, op);
- mdelay(1); /* wait a short time to effect reset */
- ks8851_wrreg16(ks, KS_GRR, 0);
- mdelay(1); /* wait for condition to clear */
-}
-
-/**
- * ks8851_set_powermode - set power mode of the device
- * @ks: The device state
- * @pwrmode: The power mode value to write to KS_PMECR.
- *
- * Change the power mode of the chip.
- */
-static void ks8851_set_powermode(struct ks8851_net *ks, unsigned pwrmode)
-{
- unsigned pmecr;
-
- netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode);
-
- pmecr = ks8851_rdreg16(ks, KS_PMECR);
- pmecr &= ~PMECR_PM_MASK;
- pmecr |= pwrmode;
-
- ks8851_wrreg16(ks, KS_PMECR, pmecr);
-}
-
-/**
- * ks8851_write_mac_addr - write mac address to device registers
- * @dev: The network device
- *
- * Update the KS8851 MAC address registers from the address in @dev.
- *
- * This call assumes that the chip is not running, so there is no need to
- * shutdown the RXQ process whilst setting this.
-*/
-static int ks8851_write_mac_addr(struct net_device *dev)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- unsigned long flags;
- u16 val;
- int i;
-
- ks8851_lock(ks, &flags);
-
- /*
- * Wake up chip in case it was powered off when stopped; otherwise,
- * the first write to the MAC address does not take effect.
- */
- ks8851_set_powermode(ks, PMECR_PM_NORMAL);
-
- for (i = 0; i < ETH_ALEN; i += 2) {
- val = (dev->dev_addr[i] << 8) | dev->dev_addr[i + 1];
- ks8851_wrreg16(ks, KS_MAR(i), val);
- }
-
- if (!netif_running(dev))
- ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN);
-
- ks8851_unlock(ks, &flags);
-
- return 0;
-}
-
-/**
- * ks8851_read_mac_addr - read mac address from device registers
- * @dev: The network device
- *
- * Update our copy of the KS8851 MAC address from the registers of @dev.
-*/
-static void ks8851_read_mac_addr(struct net_device *dev)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- unsigned long flags;
- u16 reg;
- int i;
-
- ks8851_lock(ks, &flags);
-
- for (i = 0; i < ETH_ALEN; i += 2) {
- reg = ks8851_rdreg16(ks, KS_MAR(i));
- dev->dev_addr[i] = reg >> 8;
- dev->dev_addr[i + 1] = reg & 0xff;
- }
-
- ks8851_unlock(ks, &flags);
-}
-
-/**
- * ks8851_init_mac - initialise the mac address
- * @ks: The device structure
- * @np: The device node pointer
- *
- * Get or create the initial mac address for the device and then set that
- * into the station address register. A mac address supplied in the device
- * tree takes precedence. Otherwise, if there is an EEPROM present, then
- * we try that. If no valid mac address is found we use eth_random_addr()
- * to create a new one.
- */
-static void ks8851_init_mac(struct ks8851_net *ks, struct device_node *np)
-{
- struct net_device *dev = ks->netdev;
- const u8 *mac_addr;
-
- mac_addr = of_get_mac_address(np);
- if (!IS_ERR(mac_addr)) {
- ether_addr_copy(dev->dev_addr, mac_addr);
- ks8851_write_mac_addr(dev);
- return;
- }
-
- if (ks->rc_ccr & CCR_EEPROM) {
- ks8851_read_mac_addr(dev);
- if (is_valid_ether_addr(dev->dev_addr))
- return;
-
- netdev_err(ks->netdev, "invalid mac address read %pM\n",
- dev->dev_addr);
- }
-
- eth_hw_addr_random(dev);
- ks8851_write_mac_addr(dev);
-}
-
-/**
- * ks8851_rdfifo_spi - read data from the receive fifo via SPI
- * @ks: The device state.
- * @buff: The buffer address
- * @len: The length of the data to read
- *
- * Issue an RXQ FIFO read command and read the @len amount of data from
- * the FIFO into the buffer specified by @buff.
- */
-static void ks8851_rdfifo_spi(struct ks8851_net *ks, u8 *buff,
- unsigned int len)
-{
- struct ks8851_net_spi *kss = to_ks8851_spi(ks);
- struct spi_transfer *xfer = kss->spi_xfer2;
- struct spi_message *msg = &kss->spi_msg2;
- u8 txb[1];
- int ret;
-
- netif_dbg(ks, rx_status, ks->netdev,
- "%s: %d@%p\n", __func__, len, buff);
-
- /* set the operation we're issuing */
- txb[0] = KS_SPIOP_RXFIFO;
-
- xfer->tx_buf = txb;
- xfer->rx_buf = NULL;
- xfer->len = 1;
-
- xfer++;
- xfer->rx_buf = buff;
- xfer->tx_buf = NULL;
- xfer->len = len;
-
- ret = spi_sync(kss->spidev, msg);
- if (ret < 0)
- netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__);
-}
-
-/**
- * ks8851_dbg_dumpkkt - dump initial packet contents to debug
- * @ks: The device state
- * @rxpkt: The data for the received packet
- *
- * Dump the initial data from the packet to dev_dbg().
-*/
-static void ks8851_dbg_dumpkkt(struct ks8851_net *ks, u8 *rxpkt)
-{
- netdev_dbg(ks->netdev,
- "pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n",
- rxpkt[4], rxpkt[5], rxpkt[6], rxpkt[7],
- rxpkt[8], rxpkt[9], rxpkt[10], rxpkt[11],
- rxpkt[12], rxpkt[13], rxpkt[14], rxpkt[15]);
-}
-
-/**
- * ks8851_rx_skb_spi - receive skbuff for SPI
- * @ks: The device state
- * @skb: The skbuff
- */
-static void ks8851_rx_skb_spi(struct ks8851_net *ks, struct sk_buff *skb)
-{
- netif_rx_ni(skb);
-}
-
-/**
- * ks8851_rx_skb - receive skbuff
- * @ks: The device state
- * @skb: The skbuff
- */
-static void ks8851_rx_skb(struct ks8851_net *ks, struct sk_buff *skb)
-{
- ks->rx_skb(ks, skb);
-}
-
-/**
- * ks8851_rx_pkts - receive packets from the host
- * @ks: The device information.
- *
- * This is called from the IRQ work queue when the system detects that there
- * are packets in the receive queue. Find out how many packets there are and
- * read them from the FIFO.
- */
-static void ks8851_rx_pkts(struct ks8851_net *ks)
-{
- struct sk_buff *skb;
- unsigned rxfc;
- unsigned rxlen;
- unsigned rxstat;
- u8 *rxpkt;
-
- rxfc = (ks8851_rdreg16(ks, KS_RXFCTR) >> 8) & 0xff;
-
- netif_dbg(ks, rx_status, ks->netdev,
- "%s: %d packets\n", __func__, rxfc);
-
- /* Currently we're issuing a read per packet, but we could possibly
- * improve the code by issuing a single read, getting the receive
- * header, allocating the packet and then reading the packet data
- * out in one go.
- *
- * This form of operation would require us to hold the SPI bus'
- * chipselect low during the entie transaction to avoid any
- * reset to the data stream coming from the chip.
- */
-
- for (; rxfc != 0; rxfc--) {
- rxstat = ks8851_rdreg16(ks, KS_RXFHSR);
- rxlen = ks8851_rdreg16(ks, KS_RXFHBCR) & RXFHBCR_CNT_MASK;
-
- netif_dbg(ks, rx_status, ks->netdev,
- "rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen);
-
- /* the length of the packet includes the 32bit CRC */
-
- /* set dma read address */
- ks8851_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI | 0x00);
-
- /* start DMA access */
- ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA);
-
- if (rxlen > 4) {
- unsigned int rxalign;
-
- rxlen -= 4;
- rxalign = ALIGN(rxlen, 4);
- skb = netdev_alloc_skb_ip_align(ks->netdev, rxalign);
- if (skb) {
-
- /* 4 bytes of status header + 4 bytes of
- * garbage: we put them before ethernet
- * header, so that they are copied,
- * but ignored.
- */
-
- rxpkt = skb_put(skb, rxlen) - 8;
-
- ks->rdfifo(ks, rxpkt, rxalign + 8);
-
- if (netif_msg_pktdata(ks))
- ks8851_dbg_dumpkkt(ks, rxpkt);
-
- skb->protocol = eth_type_trans(skb, ks->netdev);
- ks8851_rx_skb(ks, skb);
-
- ks->netdev->stats.rx_packets++;
- ks->netdev->stats.rx_bytes += rxlen;
- }
- }
-
- /* end DMA access and dequeue packet */
- ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_RRXEF);
- }
-}
-
-/**
- * ks8851_irq - IRQ handler for dealing with interrupt requests
- * @irq: IRQ number
- * @_ks: cookie
- *
- * This handler is invoked when the IRQ line asserts to find out what happened.
- * As we cannot allow ourselves to sleep in HARDIRQ context, this handler runs
- * in thread context.
- *
- * Read the interrupt status, work out what needs to be done and then clear
- * any of the interrupts that are not needed.
- */
-static irqreturn_t ks8851_irq(int irq, void *_ks)
-{
- struct ks8851_net *ks = _ks;
- unsigned handled = 0;
- unsigned long flags;
- unsigned int status;
-
- ks8851_lock(ks, &flags);
-
- status = ks8851_rdreg16(ks, KS_ISR);
-
- netif_dbg(ks, intr, ks->netdev,
- "%s: status 0x%04x\n", __func__, status);
-
- if (status & IRQ_LCI)
- handled |= IRQ_LCI;
-
- if (status & IRQ_LDI) {
- u16 pmecr = ks8851_rdreg16(ks, KS_PMECR);
- pmecr &= ~PMECR_WKEVT_MASK;
- ks8851_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK);
-
- handled |= IRQ_LDI;
- }
-
- if (status & IRQ_RXPSI)
- handled |= IRQ_RXPSI;
-
- if (status & IRQ_TXI) {
- handled |= IRQ_TXI;
-
- /* no lock here, tx queue should have been stopped */
-
- /* update our idea of how much tx space is available to the
- * system */
- ks->tx_space = ks8851_rdreg16(ks, KS_TXMIR);
-
- netif_dbg(ks, intr, ks->netdev,
- "%s: txspace %d\n", __func__, ks->tx_space);
- }
-
- if (status & IRQ_RXI)
- handled |= IRQ_RXI;
-
- if (status & IRQ_SPIBEI) {
- netdev_err(ks->netdev, "%s: spi bus error\n", __func__);
- handled |= IRQ_SPIBEI;
- }
-
- ks8851_wrreg16(ks, KS_ISR, handled);
-
- if (status & IRQ_RXI) {
- /* the datasheet says to disable the rx interrupt during
- * packet read-out, however we're masking the interrupt
- * from the device so do not bother masking just the RX
- * from the device. */
-
- ks8851_rx_pkts(ks);
- }
-
- /* if something stopped the rx process, probably due to wanting
- * to change the rx settings, then do something about restarting
- * it. */
- if (status & IRQ_RXPSI) {
- struct ks8851_rxctrl *rxc = &ks->rxctrl;
-
- /* update the multicast hash table */
- ks8851_wrreg16(ks, KS_MAHTR0, rxc->mchash[0]);
- ks8851_wrreg16(ks, KS_MAHTR1, rxc->mchash[1]);
- ks8851_wrreg16(ks, KS_MAHTR2, rxc->mchash[2]);
- ks8851_wrreg16(ks, KS_MAHTR3, rxc->mchash[3]);
-
- ks8851_wrreg16(ks, KS_RXCR2, rxc->rxcr2);
- ks8851_wrreg16(ks, KS_RXCR1, rxc->rxcr1);
- }
-
- ks8851_unlock(ks, &flags);
-
- if (status & IRQ_LCI)
- mii_check_link(&ks->mii);
-
- if (status & IRQ_TXI)
- netif_wake_queue(ks->netdev);
-
- return IRQ_HANDLED;
-}
-
-/**
- * calc_txlen - calculate size of message to send packet
- * @len: Length of data
- *
- * Returns the size of the TXFIFO message needed to send
- * this packet.
- */
-static inline unsigned calc_txlen(unsigned len)
-{
- return ALIGN(len + 4, 4);
-}
-
-/**
- * ks8851_wrpkt_spi - write packet to TX FIFO via SPI
- * @ks: The device state.
- * @txp: The sk_buff to transmit.
- * @irq: IRQ on completion of the packet.
- *
- * Send the @txp to the chip. This means creating the relevant packet header
- * specifying the length of the packet and the other information the chip
- * needs, such as IRQ on completion. Send the header and the packet data to
- * the device.
- */
-static void ks8851_wrpkt_spi(struct ks8851_net *ks, struct sk_buff *txp,
- bool irq)
-{
- struct ks8851_net_spi *kss = to_ks8851_spi(ks);
- struct spi_transfer *xfer = kss->spi_xfer2;
- struct spi_message *msg = &kss->spi_msg2;
- unsigned fid = 0;
- int ret;
-
- netif_dbg(ks, tx_queued, ks->netdev, "%s: skb %p, %d@%p, irq %d\n",
- __func__, txp, txp->len, txp->data, irq);
-
- fid = ks->fid++;
- fid &= TXFR_TXFID_MASK;
-
- if (irq)
- fid |= TXFR_TXIC; /* irq on completion */
-
- /* start header at txb[1] to align txw entries */
- ks->txh.txb[1] = KS_SPIOP_TXFIFO;
- ks->txh.txw[1] = cpu_to_le16(fid);
- ks->txh.txw[2] = cpu_to_le16(txp->len);
-
- xfer->tx_buf = &ks->txh.txb[1];
- xfer->rx_buf = NULL;
- xfer->len = 5;
-
- xfer++;
- xfer->tx_buf = txp->data;
- xfer->rx_buf = NULL;
- xfer->len = ALIGN(txp->len, 4);
-
- ret = spi_sync(kss->spidev, msg);
- if (ret < 0)
- netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__);
-}
-
-/**
- * ks8851_done_tx - update and then free skbuff after transmitting
- * @ks: The device state
- * @txb: The buffer transmitted
- */
-static void ks8851_done_tx(struct ks8851_net *ks, struct sk_buff *txb)
-{
- struct net_device *dev = ks->netdev;
-
- dev->stats.tx_bytes += txb->len;
- dev->stats.tx_packets++;
-
- dev_kfree_skb(txb);
-}
-
-/**
- * ks8851_tx_work - process tx packet(s)
- * @work: The work strucutre what was scheduled.
- *
- * This is called when a number of packets have been scheduled for
- * transmission and need to be sent to the device.
- */
-static void ks8851_tx_work(struct work_struct *work)
-{
- struct ks8851_net_spi *kss;
- struct ks8851_net *ks;
- unsigned long flags;
- struct sk_buff *txb;
- bool last;
-
- kss = container_of(work, struct ks8851_net_spi, tx_work);
- ks = &kss->ks8851;
- last = skb_queue_empty(&ks->txq);
-
- ks8851_lock(ks, &flags);
-
- while (!last) {
- txb = skb_dequeue(&ks->txq);
- last = skb_queue_empty(&ks->txq);
-
- if (txb != NULL) {
- ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA);
- ks->wrfifo(ks, txb, last);
- ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
- ks8851_wrreg16(ks, KS_TXQCR, TXQCR_METFE);
-
- ks8851_done_tx(ks, txb);
- }
- }
-
- ks8851_unlock(ks, &flags);
-}
-
-/**
- * ks8851_flush_tx_work_spi - flush outstanding TX work for SPI
- * @ks: The device state
- */
-static void ks8851_flush_tx_work_spi(struct ks8851_net *ks)
-{
- struct ks8851_net_spi *kss = to_ks8851_spi(ks);
-
- flush_work(&kss->tx_work);
-}
-
-/**
- * ks8851_flush_tx_work - flush outstanding TX work
- * @ks: The device state
- */
-static void ks8851_flush_tx_work(struct ks8851_net *ks)
-{
- if (ks->flush_tx_work)
- ks->flush_tx_work(ks);
-}
-
-/**
- * ks8851_net_open - open network device
- * @dev: The network device being opened.
- *
- * Called when the network device is marked active, such as a user executing
- * 'ifconfig up' on the device.
- */
-static int ks8851_net_open(struct net_device *dev)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- unsigned long flags;
- int ret;
-
- ret = request_threaded_irq(dev->irq, NULL, ks8851_irq,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
- dev->name, ks);
- if (ret < 0) {
- netdev_err(dev, "failed to get irq\n");
- return ret;
- }
-
- /* lock the card, even if we may not actually be doing anything
- * else at the moment */
- ks8851_lock(ks, &flags);
-
- netif_dbg(ks, ifup, ks->netdev, "opening\n");
-
- /* bring chip out of any power saving mode it was in */
- ks8851_set_powermode(ks, PMECR_PM_NORMAL);
-
- /* issue a soft reset to the RX/TX QMU to put it into a known
- * state. */
- ks8851_soft_reset(ks, GRR_QMU);
-
- /* setup transmission parameters */
-
- ks8851_wrreg16(ks, KS_TXCR, (TXCR_TXE | /* enable transmit process */
- TXCR_TXPE | /* pad to min length */
- TXCR_TXCRC | /* add CRC */
- TXCR_TXFCE)); /* enable flow control */
-
- /* auto-increment tx data, reset tx pointer */
- ks8851_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI);
-
- /* setup receiver control */
-
- ks8851_wrreg16(ks, KS_RXCR1, (RXCR1_RXPAFMA | /* from mac filter */
- RXCR1_RXFCE | /* enable flow control */
- RXCR1_RXBE | /* broadcast enable */
- RXCR1_RXUE | /* unicast enable */
- RXCR1_RXE)); /* enable rx block */
-
- /* transfer entire frames out in one go */
- ks8851_wrreg16(ks, KS_RXCR2, RXCR2_SRDBL_FRAME);
-
- /* set receive counter timeouts */
- ks8851_wrreg16(ks, KS_RXDTTR, 1000); /* 1ms after first frame to IRQ */
- ks8851_wrreg16(ks, KS_RXDBCTR, 4096); /* >4Kbytes in buffer to IRQ */
- ks8851_wrreg16(ks, KS_RXFCTR, 10); /* 10 frames to IRQ */
-
- ks->rc_rxqcr = (RXQCR_RXFCTE | /* IRQ on frame count exceeded */
- RXQCR_RXDBCTE | /* IRQ on byte count exceeded */
- RXQCR_RXDTTE); /* IRQ on time exceeded */
-
- ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
-
- /* clear then enable interrupts */
- ks8851_wrreg16(ks, KS_ISR, ks->rc_ier);
- ks8851_wrreg16(ks, KS_IER, ks->rc_ier);
-
- netif_start_queue(ks->netdev);
-
- netif_dbg(ks, ifup, ks->netdev, "network device up\n");
-
- ks8851_unlock(ks, &flags);
- mii_check_link(&ks->mii);
- return 0;
-}
-
-/**
- * ks8851_net_stop - close network device
- * @dev: The device being closed.
- *
- * Called to close down a network device which has been active. Cancell any
- * work, shutdown the RX and TX process and then place the chip into a low
- * power state whilst it is not being used.
- */
-static int ks8851_net_stop(struct net_device *dev)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- unsigned long flags;
-
- netif_info(ks, ifdown, dev, "shutting down\n");
-
- netif_stop_queue(dev);
-
- ks8851_lock(ks, &flags);
- /* turn off the IRQs and ack any outstanding */
- ks8851_wrreg16(ks, KS_IER, 0x0000);
- ks8851_wrreg16(ks, KS_ISR, 0xffff);
- ks8851_unlock(ks, &flags);
-
- /* stop any outstanding work */
- ks8851_flush_tx_work(ks);
- flush_work(&ks->rxctrl_work);
-
- ks8851_lock(ks, &flags);
- /* shutdown RX process */
- ks8851_wrreg16(ks, KS_RXCR1, 0x0000);
-
- /* shutdown TX process */
- ks8851_wrreg16(ks, KS_TXCR, 0x0000);
-
- /* set powermode to soft power down to save power */
- ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN);
- ks8851_unlock(ks, &flags);
-
- /* ensure any queued tx buffers are dumped */
- while (!skb_queue_empty(&ks->txq)) {
- struct sk_buff *txb = skb_dequeue(&ks->txq);
-
- netif_dbg(ks, ifdown, ks->netdev,
- "%s: freeing txb %p\n", __func__, txb);
-
- dev_kfree_skb(txb);
- }
-
- free_irq(dev->irq, ks);
-
- return 0;
-}
-
-/**
- * ks8851_start_xmit_spi - transmit packet using SPI
- * @skb: The buffer to transmit
- * @dev: The device used to transmit the packet.
- *
- * Called by the network layer to transmit the @skb. Queue the packet for
- * the device and schedule the necessary work to transmit the packet when
- * it is free.
- *
- * We do this to firstly avoid sleeping with the network device locked,
- * and secondly so we can round up more than one packet to transmit which
- * means we can try and avoid generating too many transmit done interrupts.
- */
-static netdev_tx_t ks8851_start_xmit_spi(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- unsigned needed = calc_txlen(skb->len);
- netdev_tx_t ret = NETDEV_TX_OK;
- struct ks8851_net_spi *kss;
-
- kss = to_ks8851_spi(ks);
-
- netif_dbg(ks, tx_queued, ks->netdev,
- "%s: skb %p, %d@%p\n", __func__, skb, skb->len, skb->data);
-
- spin_lock(&ks->statelock);
-
- if (needed > ks->tx_space) {
- netif_stop_queue(dev);
- ret = NETDEV_TX_BUSY;
- } else {
- ks->tx_space -= needed;
- skb_queue_tail(&ks->txq, skb);
- }
-
- spin_unlock(&ks->statelock);
- schedule_work(&kss->tx_work);
-
- return ret;
-}
-
-/**
- * ks8851_start_xmit - transmit packet
- * @skb: The buffer to transmit
- * @dev: The device used to transmit the packet.
- *
- * Called by the network layer to transmit the @skb. Queue the packet for
- * the device and schedule the necessary work to transmit the packet when
- * it is free.
- *
- * We do this to firstly avoid sleeping with the network device locked,
- * and secondly so we can round up more than one packet to transmit which
- * means we can try and avoid generating too many transmit done interrupts.
- */
-static netdev_tx_t ks8851_start_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct ks8851_net *ks = netdev_priv(dev);
-
- return ks->start_xmit(skb, dev);
-}
-
-/**
- * ks8851_rxctrl_work - work handler to change rx mode
- * @work: The work structure this belongs to.
- *
- * Lock the device and issue the necessary changes to the receive mode from
- * the network device layer. This is done so that we can do this without
- * having to sleep whilst holding the network device lock.
- *
- * Since the recommendation from Micrel is that the RXQ is shutdown whilst the
- * receive parameters are programmed, we issue a write to disable the RXQ and
- * then wait for the interrupt handler to be triggered once the RXQ shutdown is
- * complete. The interrupt handler then writes the new values into the chip.
- */
-static void ks8851_rxctrl_work(struct work_struct *work)
-{
- struct ks8851_net *ks = container_of(work, struct ks8851_net, rxctrl_work);
- unsigned long flags;
-
- ks8851_lock(ks, &flags);
-
- /* need to shutdown RXQ before modifying filter parameters */
- ks8851_wrreg16(ks, KS_RXCR1, 0x00);
-
- ks8851_unlock(ks, &flags);
-}
-
-static void ks8851_set_rx_mode(struct net_device *dev)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- struct ks8851_rxctrl rxctrl;
-
- memset(&rxctrl, 0, sizeof(rxctrl));
-
- if (dev->flags & IFF_PROMISC) {
- /* interface to receive everything */
-
- rxctrl.rxcr1 = RXCR1_RXAE | RXCR1_RXINVF;
- } else if (dev->flags & IFF_ALLMULTI) {
- /* accept all multicast packets */
-
- rxctrl.rxcr1 = (RXCR1_RXME | RXCR1_RXAE |
- RXCR1_RXPAFMA | RXCR1_RXMAFMA);
- } else if (dev->flags & IFF_MULTICAST && !netdev_mc_empty(dev)) {
- struct netdev_hw_addr *ha;
- u32 crc;
-
- /* accept some multicast */
-
- netdev_for_each_mc_addr(ha, dev) {
- crc = ether_crc(ETH_ALEN, ha->addr);
- crc >>= (32 - 6); /* get top six bits */
-
- rxctrl.mchash[crc >> 4] |= (1 << (crc & 0xf));
- }
-
- rxctrl.rxcr1 = RXCR1_RXME | RXCR1_RXPAFMA;
- } else {
- /* just accept broadcast / unicast */
- rxctrl.rxcr1 = RXCR1_RXPAFMA;
- }
-
- rxctrl.rxcr1 |= (RXCR1_RXUE | /* unicast enable */
- RXCR1_RXBE | /* broadcast enable */
- RXCR1_RXE | /* RX process enable */
- RXCR1_RXFCE); /* enable flow control */
-
- rxctrl.rxcr2 |= RXCR2_SRDBL_FRAME;
-
- /* schedule work to do the actual set of the data if needed */
-
- spin_lock(&ks->statelock);
-
- if (memcmp(&rxctrl, &ks->rxctrl, sizeof(rxctrl)) != 0) {
- memcpy(&ks->rxctrl, &rxctrl, sizeof(ks->rxctrl));
- schedule_work(&ks->rxctrl_work);
- }
-
- spin_unlock(&ks->statelock);
-}
-
-static int ks8851_set_mac_address(struct net_device *dev, void *addr)
-{
- struct sockaddr *sa = addr;
-
- if (netif_running(dev))
- return -EBUSY;
-
- if (!is_valid_ether_addr(sa->sa_data))
- return -EADDRNOTAVAIL;
-
- memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
- return ks8851_write_mac_addr(dev);
-}
-
-static int ks8851_net_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
-{
- struct ks8851_net *ks = netdev_priv(dev);
-
- if (!netif_running(dev))
- return -EINVAL;
-
- return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL);
-}
-
-static const struct net_device_ops ks8851_netdev_ops = {
- .ndo_open = ks8851_net_open,
- .ndo_stop = ks8851_net_stop,
- .ndo_do_ioctl = ks8851_net_ioctl,
- .ndo_start_xmit = ks8851_start_xmit,
- .ndo_set_mac_address = ks8851_set_mac_address,
- .ndo_set_rx_mode = ks8851_set_rx_mode,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-/* ethtool support */
-
-static void ks8851_get_drvinfo(struct net_device *dev,
- struct ethtool_drvinfo *di)
-{
- strlcpy(di->driver, "KS8851", sizeof(di->driver));
- strlcpy(di->version, "1.00", sizeof(di->version));
- strlcpy(di->bus_info, dev_name(dev->dev.parent), sizeof(di->bus_info));
-}
-
-static u32 ks8851_get_msglevel(struct net_device *dev)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- return ks->msg_enable;
-}
-
-static void ks8851_set_msglevel(struct net_device *dev, u32 to)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- ks->msg_enable = to;
-}
-
-static int ks8851_get_link_ksettings(struct net_device *dev,
- struct ethtool_link_ksettings *cmd)
-{
- struct ks8851_net *ks = netdev_priv(dev);
-
- mii_ethtool_get_link_ksettings(&ks->mii, cmd);
-
- return 0;
-}
-
-static int ks8851_set_link_ksettings(struct net_device *dev,
- const struct ethtool_link_ksettings *cmd)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- return mii_ethtool_set_link_ksettings(&ks->mii, cmd);
-}
-
-static u32 ks8851_get_link(struct net_device *dev)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- return mii_link_ok(&ks->mii);
-}
-
-static int ks8851_nway_reset(struct net_device *dev)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- return mii_nway_restart(&ks->mii);
-}
-
-/* EEPROM support */
-
-static void ks8851_eeprom_regread(struct eeprom_93cx6 *ee)
-{
- struct ks8851_net *ks = ee->data;
- unsigned val;
-
- val = ks8851_rdreg16(ks, KS_EEPCR);
-
- ee->reg_data_out = (val & EEPCR_EESB) ? 1 : 0;
- ee->reg_data_clock = (val & EEPCR_EESCK) ? 1 : 0;
- ee->reg_chip_select = (val & EEPCR_EECS) ? 1 : 0;
-}
-
-static void ks8851_eeprom_regwrite(struct eeprom_93cx6 *ee)
-{
- struct ks8851_net *ks = ee->data;
- unsigned val = EEPCR_EESA; /* default - eeprom access on */
-
- if (ee->drive_data)
- val |= EEPCR_EESRWA;
- if (ee->reg_data_in)
- val |= EEPCR_EEDO;
- if (ee->reg_data_clock)
- val |= EEPCR_EESCK;
- if (ee->reg_chip_select)
- val |= EEPCR_EECS;
-
- ks8851_wrreg16(ks, KS_EEPCR, val);
-}
-
-/**
- * ks8851_eeprom_claim - claim device EEPROM and activate the interface
- * @ks: The network device state.
- *
- * Check for the presence of an EEPROM, and then activate software access
- * to the device.
- */
-static int ks8851_eeprom_claim(struct ks8851_net *ks)
-{
- /* start with clock low, cs high */
- ks8851_wrreg16(ks, KS_EEPCR, EEPCR_EESA | EEPCR_EECS);
- return 0;
-}
-
-/**
- * ks8851_eeprom_release - release the EEPROM interface
- * @ks: The device state
- *
- * Release the software access to the device EEPROM
- */
-static void ks8851_eeprom_release(struct ks8851_net *ks)
-{
- unsigned val = ks8851_rdreg16(ks, KS_EEPCR);
-
- ks8851_wrreg16(ks, KS_EEPCR, val & ~EEPCR_EESA);
-}
-
-#define KS_EEPROM_MAGIC (0x00008851)
-
-static int ks8851_set_eeprom(struct net_device *dev,
- struct ethtool_eeprom *ee, u8 *data)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- int offset = ee->offset;
- unsigned long flags;
- int len = ee->len;
- u16 tmp;
-
- /* currently only support byte writing */
- if (len != 1)
- return -EINVAL;
-
- if (ee->magic != KS_EEPROM_MAGIC)
- return -EINVAL;
-
- if (!(ks->rc_ccr & CCR_EEPROM))
- return -ENOENT;
-
- ks8851_lock(ks, &flags);
-
- ks8851_eeprom_claim(ks);
-
- eeprom_93cx6_wren(&ks->eeprom, true);
-
- /* ethtool currently only supports writing bytes, which means
- * we have to read/modify/write our 16bit EEPROMs */
-
- eeprom_93cx6_read(&ks->eeprom, offset/2, &tmp);
-
- if (offset & 1) {
- tmp &= 0xff;
- tmp |= *data << 8;
- } else {
- tmp &= 0xff00;
- tmp |= *data;
- }
-
- eeprom_93cx6_write(&ks->eeprom, offset/2, tmp);
- eeprom_93cx6_wren(&ks->eeprom, false);
-
- ks8851_eeprom_release(ks);
- ks8851_unlock(ks, &flags);
-
- return 0;
-}
-
-static int ks8851_get_eeprom(struct net_device *dev,
- struct ethtool_eeprom *ee, u8 *data)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- int offset = ee->offset;
- unsigned long flags;
- int len = ee->len;
-
- /* must be 2 byte aligned */
- if (len & 1 || offset & 1)
- return -EINVAL;
-
- if (!(ks->rc_ccr & CCR_EEPROM))
- return -ENOENT;
-
- ks8851_lock(ks, &flags);
-
- ks8851_eeprom_claim(ks);
-
- ee->magic = KS_EEPROM_MAGIC;
-
- eeprom_93cx6_multiread(&ks->eeprom, offset/2, (__le16 *)data, len/2);
- ks8851_eeprom_release(ks);
- ks8851_unlock(ks, &flags);
-
- return 0;
-}
-
-static int ks8851_get_eeprom_len(struct net_device *dev)
-{
- struct ks8851_net *ks = netdev_priv(dev);
-
- /* currently, we assume it is an 93C46 attached, so return 128 */
- return ks->rc_ccr & CCR_EEPROM ? 128 : 0;
-}
-
-static const struct ethtool_ops ks8851_ethtool_ops = {
- .get_drvinfo = ks8851_get_drvinfo,
- .get_msglevel = ks8851_get_msglevel,
- .set_msglevel = ks8851_set_msglevel,
- .get_link = ks8851_get_link,
- .nway_reset = ks8851_nway_reset,
- .get_eeprom_len = ks8851_get_eeprom_len,
- .get_eeprom = ks8851_get_eeprom,
- .set_eeprom = ks8851_set_eeprom,
- .get_link_ksettings = ks8851_get_link_ksettings,
- .set_link_ksettings = ks8851_set_link_ksettings,
-};
-
-/* MII interface controls */
-
-/**
- * ks8851_phy_reg - convert MII register into a KS8851 register
- * @reg: MII register number.
- *
- * Return the KS8851 register number for the corresponding MII PHY register
- * if possible. Return zero if the MII register has no direct mapping to the
- * KS8851 register set.
- */
-static int ks8851_phy_reg(int reg)
-{
- switch (reg) {
- case MII_BMCR:
- return KS_P1MBCR;
- case MII_BMSR:
- return KS_P1MBSR;
- case MII_PHYSID1:
- return KS_PHY1ILR;
- case MII_PHYSID2:
- return KS_PHY1IHR;
- case MII_ADVERTISE:
- return KS_P1ANAR;
- case MII_LPA:
- return KS_P1ANLPR;
- }
-
- return 0x0;
-}
-
-/**
- * ks8851_phy_read - MII interface PHY register read.
- * @dev: The network device the PHY is on.
- * @phy_addr: Address of PHY (ignored as we only have one)
- * @reg: The register to read.
- *
- * This call reads data from the PHY register specified in @reg. Since the
- * device does not support all the MII registers, the non-existent values
- * are always returned as zero.
- *
- * We return zero for unsupported registers as the MII code does not check
- * the value returned for any error status, and simply returns it to the
- * caller. The mii-tool that the driver was tested with takes any -ve error
- * as real PHY capabilities, thus displaying incorrect data to the user.
- */
-static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- unsigned long flags;
- int ksreg;
- int result;
-
- ksreg = ks8851_phy_reg(reg);
- if (!ksreg)
- return 0x0; /* no error return allowed, so use zero */
-
- ks8851_lock(ks, &flags);
- result = ks8851_rdreg16(ks, ksreg);
- ks8851_unlock(ks, &flags);
-
- return result;
-}
-
-static void ks8851_phy_write(struct net_device *dev,
- int phy, int reg, int value)
-{
- struct ks8851_net *ks = netdev_priv(dev);
- unsigned long flags;
- int ksreg;
-
- ksreg = ks8851_phy_reg(reg);
- if (ksreg) {
- ks8851_lock(ks, &flags);
- ks8851_wrreg16(ks, ksreg, value);
- ks8851_unlock(ks, &flags);
- }
-}
-
-/**
- * ks8851_read_selftest - read the selftest memory info.
- * @ks: The device state
- *
- * Read and check the TX/RX memory selftest information.
- */
-static int ks8851_read_selftest(struct ks8851_net *ks)
-{
- unsigned both_done = MBIR_TXMBF | MBIR_RXMBF;
- int ret = 0;
- unsigned rd;
-
- rd = ks8851_rdreg16(ks, KS_MBIR);
-
- if ((rd & both_done) != both_done) {
- netdev_warn(ks->netdev, "Memory selftest not finished\n");
- return 0;
- }
-
- if (rd & MBIR_TXMBFA) {
- netdev_err(ks->netdev, "TX memory selftest fail\n");
- ret |= 1;
- }
-
- if (rd & MBIR_RXMBFA) {
- netdev_err(ks->netdev, "RX memory selftest fail\n");
- ret |= 2;
- }
-
- return 0;
-}
-
-/* driver bus management functions */
-
-#ifdef CONFIG_PM_SLEEP
-
-static int ks8851_suspend(struct device *dev)
-{
- struct ks8851_net *ks = dev_get_drvdata(dev);
- struct net_device *netdev = ks->netdev;
-
- if (netif_running(netdev)) {
- netif_device_detach(netdev);
- ks8851_net_stop(netdev);
- }
-
- return 0;
-}
-
-static int ks8851_resume(struct device *dev)
-{
- struct ks8851_net *ks = dev_get_drvdata(dev);
- struct net_device *netdev = ks->netdev;
-
- if (netif_running(netdev)) {
- ks8851_net_open(netdev);
- netif_device_attach(netdev);
- }
-
- return 0;
-}
-#endif
-
-static SIMPLE_DEV_PM_OPS(ks8851_pm_ops, ks8851_suspend, ks8851_resume);
-
-static int ks8851_probe_common(struct net_device *netdev, struct device *dev,
- int msg_en)
-{
- struct ks8851_net *ks = netdev_priv(netdev);
- unsigned cider;
- int gpio;
- int ret;
-
- ks->netdev = netdev;
- ks->tx_space = 6144;
-
- gpio = of_get_named_gpio_flags(dev->of_node, "reset-gpios", 0, NULL);
- if (gpio == -EPROBE_DEFER)
- return gpio;
-
- ks->gpio = gpio;
- if (gpio_is_valid(gpio)) {
- ret = devm_gpio_request_one(dev, gpio,
- GPIOF_OUT_INIT_LOW, "ks8851_rst_n");
- if (ret) {
- dev_err(dev, "reset gpio request failed\n");
- return ret;
- }
- }
-
- ks->vdd_io = devm_regulator_get(dev, "vdd-io");
- if (IS_ERR(ks->vdd_io)) {
- ret = PTR_ERR(ks->vdd_io);
- goto err_reg_io;
- }
-
- ret = regulator_enable(ks->vdd_io);
- if (ret) {
- dev_err(dev, "regulator vdd_io enable fail: %d\n", ret);
- goto err_reg_io;
- }
-
- ks->vdd_reg = devm_regulator_get(dev, "vdd");
- if (IS_ERR(ks->vdd_reg)) {
- ret = PTR_ERR(ks->vdd_reg);
- goto err_reg;
- }
-
- ret = regulator_enable(ks->vdd_reg);
- if (ret) {
- dev_err(dev, "regulator vdd enable fail: %d\n", ret);
- goto err_reg;
- }
-
- if (gpio_is_valid(gpio)) {
- usleep_range(10000, 11000);
- gpio_set_value(gpio, 1);
- }
-
- spin_lock_init(&ks->statelock);
-
- INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work);
-
- /* setup EEPROM state */
- ks->eeprom.data = ks;
- ks->eeprom.width = PCI_EEPROM_WIDTH_93C46;
- ks->eeprom.register_read = ks8851_eeprom_regread;
- ks->eeprom.register_write = ks8851_eeprom_regwrite;
-
- /* setup mii state */
- ks->mii.dev = netdev;
- ks->mii.phy_id = 1,
- ks->mii.phy_id_mask = 1;
- ks->mii.reg_num_mask = 0xf;
- ks->mii.mdio_read = ks8851_phy_read;
- ks->mii.mdio_write = ks8851_phy_write;
-
- dev_info(dev, "message enable is %d\n", msg_en);
-
- /* set the default message enable */
- ks->msg_enable = netif_msg_init(msg_en, NETIF_MSG_DRV |
- NETIF_MSG_PROBE |
- NETIF_MSG_LINK);
-
- skb_queue_head_init(&ks->txq);
-
- netdev->ethtool_ops = &ks8851_ethtool_ops;
- SET_NETDEV_DEV(netdev, dev);
-
- dev_set_drvdata(dev, ks);
-
- netif_carrier_off(ks->netdev);
- netdev->if_port = IF_PORT_100BASET;
- netdev->netdev_ops = &ks8851_netdev_ops;
-
- /* issue a global soft reset to reset the device. */
- ks8851_soft_reset(ks, GRR_GSR);
-
- /* simple check for a valid chip being connected to the bus */
- cider = ks8851_rdreg16(ks, KS_CIDER);
- if ((cider & ~CIDER_REV_MASK) != CIDER_ID) {
- dev_err(dev, "failed to read device ID\n");
- ret = -ENODEV;
- goto err_id;
- }
-
- /* cache the contents of the CCR register for EEPROM, etc. */
- ks->rc_ccr = ks8851_rdreg16(ks, KS_CCR);
-
- ks8851_read_selftest(ks);
- ks8851_init_mac(ks, dev->of_node);
-
- ret = register_netdev(netdev);
- if (ret) {
- dev_err(dev, "failed to register network device\n");
- goto err_netdev;
- }
-
- netdev_info(netdev, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n",
- CIDER_REV_GET(cider), netdev->dev_addr, netdev->irq,
- ks->rc_ccr & CCR_EEPROM ? "has" : "no");
-
- return 0;
-
-err_netdev:
-err_id:
- if (gpio_is_valid(gpio))
- gpio_set_value(gpio, 0);
- regulator_disable(ks->vdd_reg);
-err_reg:
- regulator_disable(ks->vdd_io);
-err_reg_io:
- return ret;
-}
-
-static int ks8851_remove_common(struct device *dev)
-{
- struct ks8851_net *priv = dev_get_drvdata(dev);
-
- if (netif_msg_drv(priv))
- dev_info(dev, "remove\n");
-
- unregister_netdev(priv->netdev);
- if (gpio_is_valid(priv->gpio))
- gpio_set_value(priv->gpio, 0);
- regulator_disable(priv->vdd_reg);
- regulator_disable(priv->vdd_io);
-
- return 0;
-}
-
-static int ks8851_probe(struct spi_device *spi)
-{
- struct device *dev = &spi->dev;
- struct ks8851_net_spi *kss;
- struct net_device *netdev;
- struct ks8851_net *ks;
-
- netdev = devm_alloc_etherdev(dev, sizeof(struct ks8851_net_spi));
- if (!netdev)
- return -ENOMEM;
-
- spi->bits_per_word = 8;
-
- ks = netdev_priv(netdev);
-
- ks->lock = ks8851_lock_spi;
- ks->unlock = ks8851_unlock_spi;
- ks->rdreg16 = ks8851_rdreg16_spi;
- ks->wrreg16 = ks8851_wrreg16_spi;
- ks->rdfifo = ks8851_rdfifo_spi;
- ks->wrfifo = ks8851_wrpkt_spi;
- ks->start_xmit = ks8851_start_xmit_spi;
- ks->rx_skb = ks8851_rx_skb_spi;
- ks->flush_tx_work = ks8851_flush_tx_work_spi;
-
-#define STD_IRQ (IRQ_LCI | /* Link Change */ \
- IRQ_TXI | /* TX done */ \
- IRQ_RXI | /* RX done */ \
- IRQ_SPIBEI | /* SPI bus error */ \
- IRQ_TXPSI | /* TX process stop */ \
- IRQ_RXPSI) /* RX process stop */
- ks->rc_ier = STD_IRQ;
-
- kss = to_ks8851_spi(ks);
-
- kss->spidev = spi;
- mutex_init(&kss->lock);
- INIT_WORK(&kss->tx_work, ks8851_tx_work);
-
- /* initialise pre-made spi transfer messages */
- spi_message_init(&kss->spi_msg1);
- spi_message_add_tail(&kss->spi_xfer1, &kss->spi_msg1);
-
- spi_message_init(&kss->spi_msg2);
- spi_message_add_tail(&kss->spi_xfer2[0], &kss->spi_msg2);
- spi_message_add_tail(&kss->spi_xfer2[1], &kss->spi_msg2);
-
- netdev->irq = spi->irq;
-
- return ks8851_probe_common(netdev, dev, msg_enable);
-}
-
-static int ks8851_remove(struct spi_device *spi)
-{
- return ks8851_remove_common(&spi->dev);
-}
-
-static const struct of_device_id ks8851_match_table[] = {
- { .compatible = "micrel,ks8851" },
- { }
-};
-MODULE_DEVICE_TABLE(of, ks8851_match_table);
-
-static struct spi_driver ks8851_driver = {
- .driver = {
- .name = "ks8851",
- .of_match_table = ks8851_match_table,
- .pm = &ks8851_pm_ops,
- },
- .probe = ks8851_probe,
- .remove = ks8851_remove,
-};
-module_spi_driver(ks8851_driver);
-
-MODULE_DESCRIPTION("KS8851 Network driver");
-MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
-MODULE_LICENSE("GPL");
-
-module_param_named(message, msg_enable, int, 0);
-MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)");
-MODULE_ALIAS("spi:ks8851");
* KS8851 register definitions
*/
+#ifndef __KS8851_H__
+#define __KS8851_H__
+
+#include <linux/eeprom_93cx6.h>
+
#define KS_CCR 0x08
#define CCR_LE (1 << 10) /* KSZ8851-16MLL */
#define CCR_EEPROM (1 << 9)
#define TXFR_TXIC (1 << 15)
#define TXFR_TXFID_MASK (0x3f << 0)
#define TXFR_TXFID_SHIFT (0)
+
+/**
+ * struct ks8851_rxctrl - KS8851 driver rx control
+ * @mchash: Multicast hash-table data.
+ * @rxcr1: KS_RXCR1 register setting
+ * @rxcr2: KS_RXCR2 register setting
+ *
+ * Representation of the settings needs to control the receive filtering
+ * such as the multicast hash-filter and the receive register settings. This
+ * is used to make the job of working out if the receive settings change and
+ * then issuing the new settings to the worker that will send the necessary
+ * commands.
+ */
+struct ks8851_rxctrl {
+ u16 mchash[4];
+ u16 rxcr1;
+ u16 rxcr2;
+};
+
+/**
+ * union ks8851_tx_hdr - tx header data
+ * @txb: The header as bytes
+ * @txw: The header as 16bit, little-endian words
+ *
+ * A dual representation of the tx header data to allow
+ * access to individual bytes, and to allow 16bit accesses
+ * with 16bit alignment.
+ */
+union ks8851_tx_hdr {
+ u8 txb[6];
+ __le16 txw[3];
+};
+
+/**
+ * struct ks8851_net - KS8851 driver private data
+ * @netdev: The network device we're bound to
+ * @statelock: Lock on this structure for tx list.
+ * @mii: The MII state information for the mii calls.
+ * @rxctrl: RX settings for @rxctrl_work.
+ * @rxctrl_work: Work queue for updating RX mode and multicast lists
+ * @txq: Queue of packets for transmission.
+ * @txh: Space for generating packet TX header in DMA-able data
+ * @rxd: Space for receiving SPI data, in DMA-able space.
+ * @txd: Space for transmitting SPI data, in DMA-able space.
+ * @msg_enable: The message flags controlling driver output (see ethtool).
+ * @fid: Incrementing frame id tag.
+ * @rc_ier: Cached copy of KS_IER.
+ * @rc_ccr: Cached copy of KS_CCR.
+ * @rc_rxqcr: Cached copy of KS_RXQCR.
+ * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM.
+ * @vdd_reg: Optional regulator supplying the chip
+ * @vdd_io: Optional digital power supply for IO
+ * @gpio: Optional reset_n gpio
+ * @lock: Bus access lock callback
+ * @unlock: Bus access unlock callback
+ * @rdreg16: 16bit register read callback
+ * @wrreg16: 16bit register write callback
+ * @rdfifo: FIFO read callback
+ * @wrfifo: FIFO write callback
+ * @start_xmit: start_xmit() implementation callback
+ * @rx_skb: rx_skb() implementation callback
+ * @flush_tx_work: flush_tx_work() implementation callback
+ *
+ * The @statelock is used to protect information in the structure which may
+ * need to be accessed via several sources, such as the network driver layer
+ * or one of the work queues.
+ *
+ * We align the buffers we may use for rx/tx to ensure that if the SPI driver
+ * wants to DMA map them, it will not have any problems with data the driver
+ * modifies.
+ */
+struct ks8851_net {
+ struct net_device *netdev;
+ spinlock_t statelock;
+
+ union ks8851_tx_hdr txh ____cacheline_aligned;
+ u8 rxd[8];
+ u8 txd[8];
+
+ u32 msg_enable ____cacheline_aligned;
+ u16 tx_space;
+ u8 fid;
+
+ u16 rc_ier;
+ u16 rc_rxqcr;
+ u16 rc_ccr;
+
+ struct mii_if_info mii;
+ struct ks8851_rxctrl rxctrl;
+
+ struct work_struct rxctrl_work;
+
+ struct sk_buff_head txq;
+
+ struct eeprom_93cx6 eeprom;
+ struct regulator *vdd_reg;
+ struct regulator *vdd_io;
+ int gpio;
+
+ void (*lock)(struct ks8851_net *ks,
+ unsigned long *flags);
+ void (*unlock)(struct ks8851_net *ks,
+ unsigned long *flags);
+ unsigned int (*rdreg16)(struct ks8851_net *ks,
+ unsigned int reg);
+ void (*wrreg16)(struct ks8851_net *ks,
+ unsigned int reg, unsigned int val);
+ void (*rdfifo)(struct ks8851_net *ks, u8 *buff,
+ unsigned int len);
+ void (*wrfifo)(struct ks8851_net *ks,
+ struct sk_buff *txp, bool irq);
+ netdev_tx_t (*start_xmit)(struct sk_buff *skb,
+ struct net_device *dev);
+ void (*rx_skb)(struct ks8851_net *ks,
+ struct sk_buff *skb);
+ void (*flush_tx_work)(struct ks8851_net *ks);
+};
+
+int ks8851_probe_common(struct net_device *netdev, struct device *dev,
+ int msg_en);
+int ks8851_remove_common(struct device *dev);
+int ks8851_suspend(struct device *dev);
+int ks8851_resume(struct device *dev);
+
+static __maybe_unused SIMPLE_DEV_PM_OPS(ks8851_pm_ops,
+ ks8851_suspend, ks8851_resume);
+
+/**
+ * ks8851_done_tx - update and then free skbuff after transmitting
+ * @ks: The device state
+ * @txb: The buffer transmitted
+ */
+static void __maybe_unused ks8851_done_tx(struct ks8851_net *ks,
+ struct sk_buff *txb)
+{
+ struct net_device *dev = ks->netdev;
+
+ dev->stats.tx_bytes += txb->len;
+ dev->stats.tx_packets++;
+
+ dev_kfree_skb(txb);
+}
+
+#endif /* __KS8851_H__ */
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/* drivers/net/ethernet/micrel/ks8851.c
+ *
+ * Copyright 2009 Simtec Electronics
+ * http://www.simtec.co.uk/
+ * Ben Dooks <ben@simtec.co.uk>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define DEBUG
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/cache.h>
+#include <linux/crc32.h>
+#include <linux/mii.h>
+#include <linux/regulator/consumer.h>
+
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/of_net.h>
+
+#include "ks8851.h"
+
+/**
+ * ks8851_lock - register access lock
+ * @ks: The chip state
+ * @flags: Spinlock flags
+ *
+ * Claim chip register access lock
+ */
+static void ks8851_lock(struct ks8851_net *ks, unsigned long *flags)
+{
+ ks->lock(ks, flags);
+}
+
+/**
+ * ks8851_unlock - register access unlock
+ * @ks: The chip state
+ * @flags: Spinlock flags
+ *
+ * Release chip register access lock
+ */
+static void ks8851_unlock(struct ks8851_net *ks, unsigned long *flags)
+{
+ ks->unlock(ks, flags);
+}
+
+/**
+ * ks8851_wrreg16 - write 16bit register value to chip
+ * @ks: The chip state
+ * @reg: The register address
+ * @val: The value to write
+ *
+ * Issue a write to put the value @val into the register specified in @reg.
+ */
+static void ks8851_wrreg16(struct ks8851_net *ks, unsigned int reg,
+ unsigned int val)
+{
+ ks->wrreg16(ks, reg, val);
+}
+
+/**
+ * ks8851_rdreg16 - read 16 bit register from device
+ * @ks: The chip information
+ * @reg: The register address
+ *
+ * Read a 16bit register from the chip, returning the result
+ */
+static unsigned int ks8851_rdreg16(struct ks8851_net *ks,
+ unsigned int reg)
+{
+ return ks->rdreg16(ks, reg);
+}
+
+/**
+ * ks8851_soft_reset - issue one of the soft reset to the device
+ * @ks: The device state.
+ * @op: The bit(s) to set in the GRR
+ *
+ * Issue the relevant soft-reset command to the device's GRR register
+ * specified by @op.
+ *
+ * Note, the delays are in there as a caution to ensure that the reset
+ * has time to take effect and then complete. Since the datasheet does
+ * not currently specify the exact sequence, we have chosen something
+ * that seems to work with our device.
+ */
+static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op)
+{
+ ks8851_wrreg16(ks, KS_GRR, op);
+ mdelay(1); /* wait a short time to effect reset */
+ ks8851_wrreg16(ks, KS_GRR, 0);
+ mdelay(1); /* wait for condition to clear */
+}
+
+/**
+ * ks8851_set_powermode - set power mode of the device
+ * @ks: The device state
+ * @pwrmode: The power mode value to write to KS_PMECR.
+ *
+ * Change the power mode of the chip.
+ */
+static void ks8851_set_powermode(struct ks8851_net *ks, unsigned pwrmode)
+{
+ unsigned pmecr;
+
+ netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode);
+
+ pmecr = ks8851_rdreg16(ks, KS_PMECR);
+ pmecr &= ~PMECR_PM_MASK;
+ pmecr |= pwrmode;
+
+ ks8851_wrreg16(ks, KS_PMECR, pmecr);
+}
+
+/**
+ * ks8851_write_mac_addr - write mac address to device registers
+ * @dev: The network device
+ *
+ * Update the KS8851 MAC address registers from the address in @dev.
+ *
+ * This call assumes that the chip is not running, so there is no need to
+ * shutdown the RXQ process whilst setting this.
+*/
+static int ks8851_write_mac_addr(struct net_device *dev)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ unsigned long flags;
+ u16 val;
+ int i;
+
+ ks8851_lock(ks, &flags);
+
+ /*
+ * Wake up chip in case it was powered off when stopped; otherwise,
+ * the first write to the MAC address does not take effect.
+ */
+ ks8851_set_powermode(ks, PMECR_PM_NORMAL);
+
+ for (i = 0; i < ETH_ALEN; i += 2) {
+ val = (dev->dev_addr[i] << 8) | dev->dev_addr[i + 1];
+ ks8851_wrreg16(ks, KS_MAR(i), val);
+ }
+
+ if (!netif_running(dev))
+ ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN);
+
+ ks8851_unlock(ks, &flags);
+
+ return 0;
+}
+
+/**
+ * ks8851_read_mac_addr - read mac address from device registers
+ * @dev: The network device
+ *
+ * Update our copy of the KS8851 MAC address from the registers of @dev.
+*/
+static void ks8851_read_mac_addr(struct net_device *dev)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ unsigned long flags;
+ u16 reg;
+ int i;
+
+ ks8851_lock(ks, &flags);
+
+ for (i = 0; i < ETH_ALEN; i += 2) {
+ reg = ks8851_rdreg16(ks, KS_MAR(i));
+ dev->dev_addr[i] = reg >> 8;
+ dev->dev_addr[i + 1] = reg & 0xff;
+ }
+
+ ks8851_unlock(ks, &flags);
+}
+
+/**
+ * ks8851_init_mac - initialise the mac address
+ * @ks: The device structure
+ * @np: The device node pointer
+ *
+ * Get or create the initial mac address for the device and then set that
+ * into the station address register. A mac address supplied in the device
+ * tree takes precedence. Otherwise, if there is an EEPROM present, then
+ * we try that. If no valid mac address is found we use eth_random_addr()
+ * to create a new one.
+ */
+static void ks8851_init_mac(struct ks8851_net *ks, struct device_node *np)
+{
+ struct net_device *dev = ks->netdev;
+ const u8 *mac_addr;
+
+ mac_addr = of_get_mac_address(np);
+ if (!IS_ERR(mac_addr)) {
+ ether_addr_copy(dev->dev_addr, mac_addr);
+ ks8851_write_mac_addr(dev);
+ return;
+ }
+
+ if (ks->rc_ccr & CCR_EEPROM) {
+ ks8851_read_mac_addr(dev);
+ if (is_valid_ether_addr(dev->dev_addr))
+ return;
+
+ netdev_err(ks->netdev, "invalid mac address read %pM\n",
+ dev->dev_addr);
+ }
+
+ eth_hw_addr_random(dev);
+ ks8851_write_mac_addr(dev);
+}
+
+/**
+ * ks8851_dbg_dumpkkt - dump initial packet contents to debug
+ * @ks: The device state
+ * @rxpkt: The data for the received packet
+ *
+ * Dump the initial data from the packet to dev_dbg().
+ */
+static void ks8851_dbg_dumpkkt(struct ks8851_net *ks, u8 *rxpkt)
+{
+ netdev_dbg(ks->netdev,
+ "pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n",
+ rxpkt[4], rxpkt[5], rxpkt[6], rxpkt[7],
+ rxpkt[8], rxpkt[9], rxpkt[10], rxpkt[11],
+ rxpkt[12], rxpkt[13], rxpkt[14], rxpkt[15]);
+}
+
+/**
+ * ks8851_rx_skb - receive skbuff
+ * @ks: The device state.
+ * @skb: The skbuff
+ */
+static void ks8851_rx_skb(struct ks8851_net *ks, struct sk_buff *skb)
+{
+ ks->rx_skb(ks, skb);
+}
+
+/**
+ * ks8851_rx_pkts - receive packets from the host
+ * @ks: The device information.
+ *
+ * This is called from the IRQ work queue when the system detects that there
+ * are packets in the receive queue. Find out how many packets there are and
+ * read them from the FIFO.
+ */
+static void ks8851_rx_pkts(struct ks8851_net *ks)
+{
+ struct sk_buff *skb;
+ unsigned rxfc;
+ unsigned rxlen;
+ unsigned rxstat;
+ u8 *rxpkt;
+
+ rxfc = (ks8851_rdreg16(ks, KS_RXFCTR) >> 8) & 0xff;
+
+ netif_dbg(ks, rx_status, ks->netdev,
+ "%s: %d packets\n", __func__, rxfc);
+
+ /* Currently we're issuing a read per packet, but we could possibly
+ * improve the code by issuing a single read, getting the receive
+ * header, allocating the packet and then reading the packet data
+ * out in one go.
+ *
+ * This form of operation would require us to hold the SPI bus'
+ * chipselect low during the entie transaction to avoid any
+ * reset to the data stream coming from the chip.
+ */
+
+ for (; rxfc != 0; rxfc--) {
+ rxstat = ks8851_rdreg16(ks, KS_RXFHSR);
+ rxlen = ks8851_rdreg16(ks, KS_RXFHBCR) & RXFHBCR_CNT_MASK;
+
+ netif_dbg(ks, rx_status, ks->netdev,
+ "rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen);
+
+ /* the length of the packet includes the 32bit CRC */
+
+ /* set dma read address */
+ ks8851_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI | 0x00);
+
+ /* start DMA access */
+ ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA);
+
+ if (rxlen > 4) {
+ unsigned int rxalign;
+
+ rxlen -= 4;
+ rxalign = ALIGN(rxlen, 4);
+ skb = netdev_alloc_skb_ip_align(ks->netdev, rxalign);
+ if (skb) {
+
+ /* 4 bytes of status header + 4 bytes of
+ * garbage: we put them before ethernet
+ * header, so that they are copied,
+ * but ignored.
+ */
+
+ rxpkt = skb_put(skb, rxlen) - 8;
+
+ ks->rdfifo(ks, rxpkt, rxalign + 8);
+
+ if (netif_msg_pktdata(ks))
+ ks8851_dbg_dumpkkt(ks, rxpkt);
+
+ skb->protocol = eth_type_trans(skb, ks->netdev);
+ ks8851_rx_skb(ks, skb);
+
+ ks->netdev->stats.rx_packets++;
+ ks->netdev->stats.rx_bytes += rxlen;
+ }
+ }
+
+ /* end DMA access and dequeue packet */
+ ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_RRXEF);
+ }
+}
+
+/**
+ * ks8851_irq - IRQ handler for dealing with interrupt requests
+ * @irq: IRQ number
+ * @_ks: cookie
+ *
+ * This handler is invoked when the IRQ line asserts to find out what happened.
+ * As we cannot allow ourselves to sleep in HARDIRQ context, this handler runs
+ * in thread context.
+ *
+ * Read the interrupt status, work out what needs to be done and then clear
+ * any of the interrupts that are not needed.
+ */
+static irqreturn_t ks8851_irq(int irq, void *_ks)
+{
+ struct ks8851_net *ks = _ks;
+ unsigned handled = 0;
+ unsigned long flags;
+ unsigned int status;
+
+ ks8851_lock(ks, &flags);
+
+ status = ks8851_rdreg16(ks, KS_ISR);
+
+ netif_dbg(ks, intr, ks->netdev,
+ "%s: status 0x%04x\n", __func__, status);
+
+ if (status & IRQ_LCI)
+ handled |= IRQ_LCI;
+
+ if (status & IRQ_LDI) {
+ u16 pmecr = ks8851_rdreg16(ks, KS_PMECR);
+ pmecr &= ~PMECR_WKEVT_MASK;
+ ks8851_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK);
+
+ handled |= IRQ_LDI;
+ }
+
+ if (status & IRQ_RXPSI)
+ handled |= IRQ_RXPSI;
+
+ if (status & IRQ_TXI) {
+ handled |= IRQ_TXI;
+
+ /* no lock here, tx queue should have been stopped */
+
+ /* update our idea of how much tx space is available to the
+ * system */
+ ks->tx_space = ks8851_rdreg16(ks, KS_TXMIR);
+
+ netif_dbg(ks, intr, ks->netdev,
+ "%s: txspace %d\n", __func__, ks->tx_space);
+ }
+
+ if (status & IRQ_RXI)
+ handled |= IRQ_RXI;
+
+ if (status & IRQ_SPIBEI) {
+ netdev_err(ks->netdev, "%s: spi bus error\n", __func__);
+ handled |= IRQ_SPIBEI;
+ }
+
+ ks8851_wrreg16(ks, KS_ISR, handled);
+
+ if (status & IRQ_RXI) {
+ /* the datasheet says to disable the rx interrupt during
+ * packet read-out, however we're masking the interrupt
+ * from the device so do not bother masking just the RX
+ * from the device. */
+
+ ks8851_rx_pkts(ks);
+ }
+
+ /* if something stopped the rx process, probably due to wanting
+ * to change the rx settings, then do something about restarting
+ * it. */
+ if (status & IRQ_RXPSI) {
+ struct ks8851_rxctrl *rxc = &ks->rxctrl;
+
+ /* update the multicast hash table */
+ ks8851_wrreg16(ks, KS_MAHTR0, rxc->mchash[0]);
+ ks8851_wrreg16(ks, KS_MAHTR1, rxc->mchash[1]);
+ ks8851_wrreg16(ks, KS_MAHTR2, rxc->mchash[2]);
+ ks8851_wrreg16(ks, KS_MAHTR3, rxc->mchash[3]);
+
+ ks8851_wrreg16(ks, KS_RXCR2, rxc->rxcr2);
+ ks8851_wrreg16(ks, KS_RXCR1, rxc->rxcr1);
+ }
+
+ ks8851_unlock(ks, &flags);
+
+ if (status & IRQ_LCI)
+ mii_check_link(&ks->mii);
+
+ if (status & IRQ_TXI)
+ netif_wake_queue(ks->netdev);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * ks8851_flush_tx_work - flush outstanding TX work
+ * @ks: The device state
+ */
+static void ks8851_flush_tx_work(struct ks8851_net *ks)
+{
+ if (ks->flush_tx_work)
+ ks->flush_tx_work(ks);
+}
+
+/**
+ * ks8851_net_open - open network device
+ * @dev: The network device being opened.
+ *
+ * Called when the network device is marked active, such as a user executing
+ * 'ifconfig up' on the device.
+ */
+static int ks8851_net_open(struct net_device *dev)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ unsigned long flags;
+ int ret;
+
+ ret = request_threaded_irq(dev->irq, NULL, ks8851_irq,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ dev->name, ks);
+ if (ret < 0) {
+ netdev_err(dev, "failed to get irq\n");
+ return ret;
+ }
+
+ /* lock the card, even if we may not actually be doing anything
+ * else at the moment */
+ ks8851_lock(ks, &flags);
+
+ netif_dbg(ks, ifup, ks->netdev, "opening\n");
+
+ /* bring chip out of any power saving mode it was in */
+ ks8851_set_powermode(ks, PMECR_PM_NORMAL);
+
+ /* issue a soft reset to the RX/TX QMU to put it into a known
+ * state. */
+ ks8851_soft_reset(ks, GRR_QMU);
+
+ /* setup transmission parameters */
+
+ ks8851_wrreg16(ks, KS_TXCR, (TXCR_TXE | /* enable transmit process */
+ TXCR_TXPE | /* pad to min length */
+ TXCR_TXCRC | /* add CRC */
+ TXCR_TXFCE)); /* enable flow control */
+
+ /* auto-increment tx data, reset tx pointer */
+ ks8851_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI);
+
+ /* setup receiver control */
+
+ ks8851_wrreg16(ks, KS_RXCR1, (RXCR1_RXPAFMA | /* from mac filter */
+ RXCR1_RXFCE | /* enable flow control */
+ RXCR1_RXBE | /* broadcast enable */
+ RXCR1_RXUE | /* unicast enable */
+ RXCR1_RXE)); /* enable rx block */
+
+ /* transfer entire frames out in one go */
+ ks8851_wrreg16(ks, KS_RXCR2, RXCR2_SRDBL_FRAME);
+
+ /* set receive counter timeouts */
+ ks8851_wrreg16(ks, KS_RXDTTR, 1000); /* 1ms after first frame to IRQ */
+ ks8851_wrreg16(ks, KS_RXDBCTR, 4096); /* >4Kbytes in buffer to IRQ */
+ ks8851_wrreg16(ks, KS_RXFCTR, 10); /* 10 frames to IRQ */
+
+ ks->rc_rxqcr = (RXQCR_RXFCTE | /* IRQ on frame count exceeded */
+ RXQCR_RXDBCTE | /* IRQ on byte count exceeded */
+ RXQCR_RXDTTE); /* IRQ on time exceeded */
+
+ ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
+
+ /* clear then enable interrupts */
+ ks8851_wrreg16(ks, KS_ISR, ks->rc_ier);
+ ks8851_wrreg16(ks, KS_IER, ks->rc_ier);
+
+ netif_start_queue(ks->netdev);
+
+ netif_dbg(ks, ifup, ks->netdev, "network device up\n");
+
+ ks8851_unlock(ks, &flags);
+ mii_check_link(&ks->mii);
+ return 0;
+}
+
+/**
+ * ks8851_net_stop - close network device
+ * @dev: The device being closed.
+ *
+ * Called to close down a network device which has been active. Cancell any
+ * work, shutdown the RX and TX process and then place the chip into a low
+ * power state whilst it is not being used.
+ */
+static int ks8851_net_stop(struct net_device *dev)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ unsigned long flags;
+
+ netif_info(ks, ifdown, dev, "shutting down\n");
+
+ netif_stop_queue(dev);
+
+ ks8851_lock(ks, &flags);
+ /* turn off the IRQs and ack any outstanding */
+ ks8851_wrreg16(ks, KS_IER, 0x0000);
+ ks8851_wrreg16(ks, KS_ISR, 0xffff);
+ ks8851_unlock(ks, &flags);
+
+ /* stop any outstanding work */
+ ks8851_flush_tx_work(ks);
+ flush_work(&ks->rxctrl_work);
+
+ ks8851_lock(ks, &flags);
+ /* shutdown RX process */
+ ks8851_wrreg16(ks, KS_RXCR1, 0x0000);
+
+ /* shutdown TX process */
+ ks8851_wrreg16(ks, KS_TXCR, 0x0000);
+
+ /* set powermode to soft power down to save power */
+ ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN);
+ ks8851_unlock(ks, &flags);
+
+ /* ensure any queued tx buffers are dumped */
+ while (!skb_queue_empty(&ks->txq)) {
+ struct sk_buff *txb = skb_dequeue(&ks->txq);
+
+ netif_dbg(ks, ifdown, ks->netdev,
+ "%s: freeing txb %p\n", __func__, txb);
+
+ dev_kfree_skb(txb);
+ }
+
+ free_irq(dev->irq, ks);
+
+ return 0;
+}
+
+/**
+ * ks8851_start_xmit - transmit packet
+ * @skb: The buffer to transmit
+ * @dev: The device used to transmit the packet.
+ *
+ * Called by the network layer to transmit the @skb. Queue the packet for
+ * the device and schedule the necessary work to transmit the packet when
+ * it is free.
+ *
+ * We do this to firstly avoid sleeping with the network device locked,
+ * and secondly so we can round up more than one packet to transmit which
+ * means we can try and avoid generating too many transmit done interrupts.
+ */
+static netdev_tx_t ks8851_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+
+ return ks->start_xmit(skb, dev);
+}
+
+/**
+ * ks8851_rxctrl_work - work handler to change rx mode
+ * @work: The work structure this belongs to.
+ *
+ * Lock the device and issue the necessary changes to the receive mode from
+ * the network device layer. This is done so that we can do this without
+ * having to sleep whilst holding the network device lock.
+ *
+ * Since the recommendation from Micrel is that the RXQ is shutdown whilst the
+ * receive parameters are programmed, we issue a write to disable the RXQ and
+ * then wait for the interrupt handler to be triggered once the RXQ shutdown is
+ * complete. The interrupt handler then writes the new values into the chip.
+ */
+static void ks8851_rxctrl_work(struct work_struct *work)
+{
+ struct ks8851_net *ks = container_of(work, struct ks8851_net, rxctrl_work);
+ unsigned long flags;
+
+ ks8851_lock(ks, &flags);
+
+ /* need to shutdown RXQ before modifying filter parameters */
+ ks8851_wrreg16(ks, KS_RXCR1, 0x00);
+
+ ks8851_unlock(ks, &flags);
+}
+
+static void ks8851_set_rx_mode(struct net_device *dev)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ struct ks8851_rxctrl rxctrl;
+
+ memset(&rxctrl, 0, sizeof(rxctrl));
+
+ if (dev->flags & IFF_PROMISC) {
+ /* interface to receive everything */
+
+ rxctrl.rxcr1 = RXCR1_RXAE | RXCR1_RXINVF;
+ } else if (dev->flags & IFF_ALLMULTI) {
+ /* accept all multicast packets */
+
+ rxctrl.rxcr1 = (RXCR1_RXME | RXCR1_RXAE |
+ RXCR1_RXPAFMA | RXCR1_RXMAFMA);
+ } else if (dev->flags & IFF_MULTICAST && !netdev_mc_empty(dev)) {
+ struct netdev_hw_addr *ha;
+ u32 crc;
+
+ /* accept some multicast */
+
+ netdev_for_each_mc_addr(ha, dev) {
+ crc = ether_crc(ETH_ALEN, ha->addr);
+ crc >>= (32 - 6); /* get top six bits */
+
+ rxctrl.mchash[crc >> 4] |= (1 << (crc & 0xf));
+ }
+
+ rxctrl.rxcr1 = RXCR1_RXME | RXCR1_RXPAFMA;
+ } else {
+ /* just accept broadcast / unicast */
+ rxctrl.rxcr1 = RXCR1_RXPAFMA;
+ }
+
+ rxctrl.rxcr1 |= (RXCR1_RXUE | /* unicast enable */
+ RXCR1_RXBE | /* broadcast enable */
+ RXCR1_RXE | /* RX process enable */
+ RXCR1_RXFCE); /* enable flow control */
+
+ rxctrl.rxcr2 |= RXCR2_SRDBL_FRAME;
+
+ /* schedule work to do the actual set of the data if needed */
+
+ spin_lock(&ks->statelock);
+
+ if (memcmp(&rxctrl, &ks->rxctrl, sizeof(rxctrl)) != 0) {
+ memcpy(&ks->rxctrl, &rxctrl, sizeof(ks->rxctrl));
+ schedule_work(&ks->rxctrl_work);
+ }
+
+ spin_unlock(&ks->statelock);
+}
+
+static int ks8851_set_mac_address(struct net_device *dev, void *addr)
+{
+ struct sockaddr *sa = addr;
+
+ if (netif_running(dev))
+ return -EBUSY;
+
+ if (!is_valid_ether_addr(sa->sa_data))
+ return -EADDRNOTAVAIL;
+
+ memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN);
+ return ks8851_write_mac_addr(dev);
+}
+
+static int ks8851_net_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL);
+}
+
+static const struct net_device_ops ks8851_netdev_ops = {
+ .ndo_open = ks8851_net_open,
+ .ndo_stop = ks8851_net_stop,
+ .ndo_do_ioctl = ks8851_net_ioctl,
+ .ndo_start_xmit = ks8851_start_xmit,
+ .ndo_set_mac_address = ks8851_set_mac_address,
+ .ndo_set_rx_mode = ks8851_set_rx_mode,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+/* ethtool support */
+
+static void ks8851_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *di)
+{
+ strlcpy(di->driver, "KS8851", sizeof(di->driver));
+ strlcpy(di->version, "1.00", sizeof(di->version));
+ strlcpy(di->bus_info, dev_name(dev->dev.parent), sizeof(di->bus_info));
+}
+
+static u32 ks8851_get_msglevel(struct net_device *dev)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ return ks->msg_enable;
+}
+
+static void ks8851_set_msglevel(struct net_device *dev, u32 to)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ ks->msg_enable = to;
+}
+
+static int ks8851_get_link_ksettings(struct net_device *dev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+
+ mii_ethtool_get_link_ksettings(&ks->mii, cmd);
+
+ return 0;
+}
+
+static int ks8851_set_link_ksettings(struct net_device *dev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ return mii_ethtool_set_link_ksettings(&ks->mii, cmd);
+}
+
+static u32 ks8851_get_link(struct net_device *dev)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ return mii_link_ok(&ks->mii);
+}
+
+static int ks8851_nway_reset(struct net_device *dev)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ return mii_nway_restart(&ks->mii);
+}
+
+/* EEPROM support */
+
+static void ks8851_eeprom_regread(struct eeprom_93cx6 *ee)
+{
+ struct ks8851_net *ks = ee->data;
+ unsigned val;
+
+ val = ks8851_rdreg16(ks, KS_EEPCR);
+
+ ee->reg_data_out = (val & EEPCR_EESB) ? 1 : 0;
+ ee->reg_data_clock = (val & EEPCR_EESCK) ? 1 : 0;
+ ee->reg_chip_select = (val & EEPCR_EECS) ? 1 : 0;
+}
+
+static void ks8851_eeprom_regwrite(struct eeprom_93cx6 *ee)
+{
+ struct ks8851_net *ks = ee->data;
+ unsigned val = EEPCR_EESA; /* default - eeprom access on */
+
+ if (ee->drive_data)
+ val |= EEPCR_EESRWA;
+ if (ee->reg_data_in)
+ val |= EEPCR_EEDO;
+ if (ee->reg_data_clock)
+ val |= EEPCR_EESCK;
+ if (ee->reg_chip_select)
+ val |= EEPCR_EECS;
+
+ ks8851_wrreg16(ks, KS_EEPCR, val);
+}
+
+/**
+ * ks8851_eeprom_claim - claim device EEPROM and activate the interface
+ * @ks: The network device state.
+ *
+ * Check for the presence of an EEPROM, and then activate software access
+ * to the device.
+ */
+static int ks8851_eeprom_claim(struct ks8851_net *ks)
+{
+ /* start with clock low, cs high */
+ ks8851_wrreg16(ks, KS_EEPCR, EEPCR_EESA | EEPCR_EECS);
+ return 0;
+}
+
+/**
+ * ks8851_eeprom_release - release the EEPROM interface
+ * @ks: The device state
+ *
+ * Release the software access to the device EEPROM
+ */
+static void ks8851_eeprom_release(struct ks8851_net *ks)
+{
+ unsigned val = ks8851_rdreg16(ks, KS_EEPCR);
+
+ ks8851_wrreg16(ks, KS_EEPCR, val & ~EEPCR_EESA);
+}
+
+#define KS_EEPROM_MAGIC (0x00008851)
+
+static int ks8851_set_eeprom(struct net_device *dev,
+ struct ethtool_eeprom *ee, u8 *data)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ int offset = ee->offset;
+ unsigned long flags;
+ int len = ee->len;
+ u16 tmp;
+
+ /* currently only support byte writing */
+ if (len != 1)
+ return -EINVAL;
+
+ if (ee->magic != KS_EEPROM_MAGIC)
+ return -EINVAL;
+
+ if (!(ks->rc_ccr & CCR_EEPROM))
+ return -ENOENT;
+
+ ks8851_lock(ks, &flags);
+
+ ks8851_eeprom_claim(ks);
+
+ eeprom_93cx6_wren(&ks->eeprom, true);
+
+ /* ethtool currently only supports writing bytes, which means
+ * we have to read/modify/write our 16bit EEPROMs */
+
+ eeprom_93cx6_read(&ks->eeprom, offset/2, &tmp);
+
+ if (offset & 1) {
+ tmp &= 0xff;
+ tmp |= *data << 8;
+ } else {
+ tmp &= 0xff00;
+ tmp |= *data;
+ }
+
+ eeprom_93cx6_write(&ks->eeprom, offset/2, tmp);
+ eeprom_93cx6_wren(&ks->eeprom, false);
+
+ ks8851_eeprom_release(ks);
+ ks8851_unlock(ks, &flags);
+
+ return 0;
+}
+
+static int ks8851_get_eeprom(struct net_device *dev,
+ struct ethtool_eeprom *ee, u8 *data)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ int offset = ee->offset;
+ unsigned long flags;
+ int len = ee->len;
+
+ /* must be 2 byte aligned */
+ if (len & 1 || offset & 1)
+ return -EINVAL;
+
+ if (!(ks->rc_ccr & CCR_EEPROM))
+ return -ENOENT;
+
+ ks8851_lock(ks, &flags);
+
+ ks8851_eeprom_claim(ks);
+
+ ee->magic = KS_EEPROM_MAGIC;
+
+ eeprom_93cx6_multiread(&ks->eeprom, offset/2, (__le16 *)data, len/2);
+ ks8851_eeprom_release(ks);
+ ks8851_unlock(ks, &flags);
+
+ return 0;
+}
+
+static int ks8851_get_eeprom_len(struct net_device *dev)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+
+ /* currently, we assume it is an 93C46 attached, so return 128 */
+ return ks->rc_ccr & CCR_EEPROM ? 128 : 0;
+}
+
+static const struct ethtool_ops ks8851_ethtool_ops = {
+ .get_drvinfo = ks8851_get_drvinfo,
+ .get_msglevel = ks8851_get_msglevel,
+ .set_msglevel = ks8851_set_msglevel,
+ .get_link = ks8851_get_link,
+ .nway_reset = ks8851_nway_reset,
+ .get_eeprom_len = ks8851_get_eeprom_len,
+ .get_eeprom = ks8851_get_eeprom,
+ .set_eeprom = ks8851_set_eeprom,
+ .get_link_ksettings = ks8851_get_link_ksettings,
+ .set_link_ksettings = ks8851_set_link_ksettings,
+};
+
+/* MII interface controls */
+
+/**
+ * ks8851_phy_reg - convert MII register into a KS8851 register
+ * @reg: MII register number.
+ *
+ * Return the KS8851 register number for the corresponding MII PHY register
+ * if possible. Return zero if the MII register has no direct mapping to the
+ * KS8851 register set.
+ */
+static int ks8851_phy_reg(int reg)
+{
+ switch (reg) {
+ case MII_BMCR:
+ return KS_P1MBCR;
+ case MII_BMSR:
+ return KS_P1MBSR;
+ case MII_PHYSID1:
+ return KS_PHY1ILR;
+ case MII_PHYSID2:
+ return KS_PHY1IHR;
+ case MII_ADVERTISE:
+ return KS_P1ANAR;
+ case MII_LPA:
+ return KS_P1ANLPR;
+ }
+
+ return 0x0;
+}
+
+/**
+ * ks8851_phy_read - MII interface PHY register read.
+ * @dev: The network device the PHY is on.
+ * @phy_addr: Address of PHY (ignored as we only have one)
+ * @reg: The register to read.
+ *
+ * This call reads data from the PHY register specified in @reg. Since the
+ * device does not support all the MII registers, the non-existent values
+ * are always returned as zero.
+ *
+ * We return zero for unsupported registers as the MII code does not check
+ * the value returned for any error status, and simply returns it to the
+ * caller. The mii-tool that the driver was tested with takes any -ve error
+ * as real PHY capabilities, thus displaying incorrect data to the user.
+ */
+static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ unsigned long flags;
+ int ksreg;
+ int result;
+
+ ksreg = ks8851_phy_reg(reg);
+ if (!ksreg)
+ return 0x0; /* no error return allowed, so use zero */
+
+ ks8851_lock(ks, &flags);
+ result = ks8851_rdreg16(ks, ksreg);
+ ks8851_unlock(ks, &flags);
+
+ return result;
+}
+
+static void ks8851_phy_write(struct net_device *dev,
+ int phy, int reg, int value)
+{
+ struct ks8851_net *ks = netdev_priv(dev);
+ unsigned long flags;
+ int ksreg;
+
+ ksreg = ks8851_phy_reg(reg);
+ if (ksreg) {
+ ks8851_lock(ks, &flags);
+ ks8851_wrreg16(ks, ksreg, value);
+ ks8851_unlock(ks, &flags);
+ }
+}
+
+/**
+ * ks8851_read_selftest - read the selftest memory info.
+ * @ks: The device state
+ *
+ * Read and check the TX/RX memory selftest information.
+ */
+static int ks8851_read_selftest(struct ks8851_net *ks)
+{
+ unsigned both_done = MBIR_TXMBF | MBIR_RXMBF;
+ int ret = 0;
+ unsigned rd;
+
+ rd = ks8851_rdreg16(ks, KS_MBIR);
+
+ if ((rd & both_done) != both_done) {
+ netdev_warn(ks->netdev, "Memory selftest not finished\n");
+ return 0;
+ }
+
+ if (rd & MBIR_TXMBFA) {
+ netdev_err(ks->netdev, "TX memory selftest fail\n");
+ ret |= 1;
+ }
+
+ if (rd & MBIR_RXMBFA) {
+ netdev_err(ks->netdev, "RX memory selftest fail\n");
+ ret |= 2;
+ }
+
+ return 0;
+}
+
+/* driver bus management functions */
+
+#ifdef CONFIG_PM_SLEEP
+
+int ks8851_suspend(struct device *dev)
+{
+ struct ks8851_net *ks = dev_get_drvdata(dev);
+ struct net_device *netdev = ks->netdev;
+
+ if (netif_running(netdev)) {
+ netif_device_detach(netdev);
+ ks8851_net_stop(netdev);
+ }
+
+ return 0;
+}
+
+int ks8851_resume(struct device *dev)
+{
+ struct ks8851_net *ks = dev_get_drvdata(dev);
+ struct net_device *netdev = ks->netdev;
+
+ if (netif_running(netdev)) {
+ ks8851_net_open(netdev);
+ netif_device_attach(netdev);
+ }
+
+ return 0;
+}
+#endif
+
+int ks8851_probe_common(struct net_device *netdev, struct device *dev,
+ int msg_en)
+{
+ struct ks8851_net *ks = netdev_priv(netdev);
+ unsigned cider;
+ int gpio;
+ int ret;
+
+ ks->netdev = netdev;
+ ks->tx_space = 6144;
+
+ gpio = of_get_named_gpio_flags(dev->of_node, "reset-gpios", 0, NULL);
+ if (gpio == -EPROBE_DEFER)
+ return gpio;
+
+ ks->gpio = gpio;
+ if (gpio_is_valid(gpio)) {
+ ret = devm_gpio_request_one(dev, gpio,
+ GPIOF_OUT_INIT_LOW, "ks8851_rst_n");
+ if (ret) {
+ dev_err(dev, "reset gpio request failed\n");
+ return ret;
+ }
+ }
+
+ ks->vdd_io = devm_regulator_get(dev, "vdd-io");
+ if (IS_ERR(ks->vdd_io)) {
+ ret = PTR_ERR(ks->vdd_io);
+ goto err_reg_io;
+ }
+
+ ret = regulator_enable(ks->vdd_io);
+ if (ret) {
+ dev_err(dev, "regulator vdd_io enable fail: %d\n", ret);
+ goto err_reg_io;
+ }
+
+ ks->vdd_reg = devm_regulator_get(dev, "vdd");
+ if (IS_ERR(ks->vdd_reg)) {
+ ret = PTR_ERR(ks->vdd_reg);
+ goto err_reg;
+ }
+
+ ret = regulator_enable(ks->vdd_reg);
+ if (ret) {
+ dev_err(dev, "regulator vdd enable fail: %d\n", ret);
+ goto err_reg;
+ }
+
+ if (gpio_is_valid(gpio)) {
+ usleep_range(10000, 11000);
+ gpio_set_value(gpio, 1);
+ }
+
+ spin_lock_init(&ks->statelock);
+
+ INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work);
+
+ /* setup EEPROM state */
+ ks->eeprom.data = ks;
+ ks->eeprom.width = PCI_EEPROM_WIDTH_93C46;
+ ks->eeprom.register_read = ks8851_eeprom_regread;
+ ks->eeprom.register_write = ks8851_eeprom_regwrite;
+
+ /* setup mii state */
+ ks->mii.dev = netdev;
+ ks->mii.phy_id = 1,
+ ks->mii.phy_id_mask = 1;
+ ks->mii.reg_num_mask = 0xf;
+ ks->mii.mdio_read = ks8851_phy_read;
+ ks->mii.mdio_write = ks8851_phy_write;
+
+ dev_info(dev, "message enable is %d\n", msg_en);
+
+ /* set the default message enable */
+ ks->msg_enable = netif_msg_init(msg_en, NETIF_MSG_DRV |
+ NETIF_MSG_PROBE |
+ NETIF_MSG_LINK);
+
+ skb_queue_head_init(&ks->txq);
+
+ netdev->ethtool_ops = &ks8851_ethtool_ops;
+ SET_NETDEV_DEV(netdev, dev);
+
+ dev_set_drvdata(dev, ks);
+
+ netif_carrier_off(ks->netdev);
+ netdev->if_port = IF_PORT_100BASET;
+ netdev->netdev_ops = &ks8851_netdev_ops;
+
+ /* issue a global soft reset to reset the device. */
+ ks8851_soft_reset(ks, GRR_GSR);
+
+ /* simple check for a valid chip being connected to the bus */
+ cider = ks8851_rdreg16(ks, KS_CIDER);
+ if ((cider & ~CIDER_REV_MASK) != CIDER_ID) {
+ dev_err(dev, "failed to read device ID\n");
+ ret = -ENODEV;
+ goto err_id;
+ }
+
+ /* cache the contents of the CCR register for EEPROM, etc. */
+ ks->rc_ccr = ks8851_rdreg16(ks, KS_CCR);
+
+ ks8851_read_selftest(ks);
+ ks8851_init_mac(ks, dev->of_node);
+
+ ret = register_netdev(netdev);
+ if (ret) {
+ dev_err(dev, "failed to register network device\n");
+ goto err_netdev;
+ }
+
+ netdev_info(netdev, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n",
+ CIDER_REV_GET(cider), netdev->dev_addr, netdev->irq,
+ ks->rc_ccr & CCR_EEPROM ? "has" : "no");
+
+ return 0;
+
+err_netdev:
+err_id:
+ if (gpio_is_valid(gpio))
+ gpio_set_value(gpio, 0);
+ regulator_disable(ks->vdd_reg);
+err_reg:
+ regulator_disable(ks->vdd_io);
+err_reg_io:
+ return ret;
+}
+
+int ks8851_remove_common(struct device *dev)
+{
+ struct ks8851_net *priv = dev_get_drvdata(dev);
+
+ if (netif_msg_drv(priv))
+ dev_info(dev, "remove\n");
+
+ unregister_netdev(priv->netdev);
+ if (gpio_is_valid(priv->gpio))
+ gpio_set_value(priv->gpio, 0);
+ regulator_disable(priv->vdd_reg);
+ regulator_disable(priv->vdd_io);
+
+ return 0;
+}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/* drivers/net/ethernet/micrel/ks8851.c
+ *
+ * Copyright 2009 Simtec Electronics
+ * http://www.simtec.co.uk/
+ * Ben Dooks <ben@simtec.co.uk>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define DEBUG
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/cache.h>
+#include <linux/crc32.h>
+#include <linux/mii.h>
+#include <linux/regulator/consumer.h>
+
+#include <linux/spi/spi.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/of_net.h>
+
+#include "ks8851.h"
+
+static int msg_enable;
+
+/**
+ * struct ks8851_net_spi - KS8851 SPI driver private data
+ * @lock: Lock to ensure that the device is not accessed when busy.
+ * @tx_work: Work queue for tx packets
+ * @ks8851: KS8851 driver common private data
+ * @spidev: The spi device we're bound to.
+ * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1.
+ * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2.
+ * @spi_xfer1: @spi_msg1 SPI transfer structure
+ * @spi_xfer2: @spi_msg2 SPI transfer structure
+ *
+ * The @lock ensures that the chip is protected when certain operations are
+ * in progress. When the read or write packet transfer is in progress, most
+ * of the chip registers are not ccessible until the transfer is finished and
+ * the DMA has been de-asserted.
+ */
+struct ks8851_net_spi {
+ struct ks8851_net ks8851;
+ struct mutex lock;
+ struct work_struct tx_work;
+ struct spi_device *spidev;
+ struct spi_message spi_msg1;
+ struct spi_message spi_msg2;
+ struct spi_transfer spi_xfer1;
+ struct spi_transfer spi_xfer2[2];
+};
+
+#define to_ks8851_spi(ks) container_of((ks), struct ks8851_net_spi, ks8851)
+
+/* SPI frame opcodes */
+#define KS_SPIOP_RD 0x00
+#define KS_SPIOP_WR 0x40
+#define KS_SPIOP_RXFIFO 0x80
+#define KS_SPIOP_TXFIFO 0xC0
+
+/* shift for byte-enable data */
+#define BYTE_EN(_x) ((_x) << 2)
+
+/* turn register number and byte-enable mask into data for start of packet */
+#define MK_OP(_byteen, _reg) \
+ (BYTE_EN(_byteen) | (_reg) << (8 + 2) | (_reg) >> 6)
+
+/**
+ * ks8851_lock_spi - register access lock
+ * @ks: The chip state
+ * @flags: Spinlock flags
+ *
+ * Claim chip register access lock
+ */
+static void ks8851_lock_spi(struct ks8851_net *ks, unsigned long *flags)
+{
+ struct ks8851_net_spi *kss = to_ks8851_spi(ks);
+
+ mutex_lock(&kss->lock);
+}
+
+/**
+ * ks8851_unlock_spi - register access unlock
+ * @ks: The chip state
+ * @flags: Spinlock flags
+ *
+ * Release chip register access lock
+ */
+static void ks8851_unlock_spi(struct ks8851_net *ks, unsigned long *flags)
+{
+ struct ks8851_net_spi *kss = to_ks8851_spi(ks);
+
+ mutex_unlock(&kss->lock);
+}
+
+/* SPI register read/write calls.
+ *
+ * All these calls issue SPI transactions to access the chip's registers. They
+ * all require that the necessary lock is held to prevent accesses when the
+ * chip is busy transferring packet data (RX/TX FIFO accesses).
+ */
+
+/**
+ * ks8851_wrreg16_spi - write 16bit register value to chip via SPI
+ * @ks: The chip state
+ * @reg: The register address
+ * @val: The value to write
+ *
+ * Issue a write to put the value @val into the register specified in @reg.
+ */
+static void ks8851_wrreg16_spi(struct ks8851_net *ks, unsigned int reg,
+ unsigned int val)
+{
+ struct ks8851_net_spi *kss = to_ks8851_spi(ks);
+ struct spi_transfer *xfer = &kss->spi_xfer1;
+ struct spi_message *msg = &kss->spi_msg1;
+ __le16 txb[2];
+ int ret;
+
+ txb[0] = cpu_to_le16(MK_OP(reg & 2 ? 0xC : 0x03, reg) | KS_SPIOP_WR);
+ txb[1] = cpu_to_le16(val);
+
+ xfer->tx_buf = txb;
+ xfer->rx_buf = NULL;
+ xfer->len = 4;
+
+ ret = spi_sync(kss->spidev, msg);
+ if (ret < 0)
+ netdev_err(ks->netdev, "spi_sync() failed\n");
+}
+
+/**
+ * ks8851_rdreg - issue read register command and return the data
+ * @ks: The device state
+ * @op: The register address and byte enables in message format.
+ * @rxb: The RX buffer to return the result into
+ * @rxl: The length of data expected.
+ *
+ * This is the low level read call that issues the necessary spi message(s)
+ * to read data from the register specified in @op.
+ */
+static void ks8851_rdreg(struct ks8851_net *ks, unsigned int op,
+ u8 *rxb, unsigned int rxl)
+{
+ struct ks8851_net_spi *kss = to_ks8851_spi(ks);
+ struct spi_transfer *xfer;
+ struct spi_message *msg;
+ __le16 *txb = (__le16 *)ks->txd;
+ u8 *trx = ks->rxd;
+ int ret;
+
+ txb[0] = cpu_to_le16(op | KS_SPIOP_RD);
+
+ if (kss->spidev->master->flags & SPI_MASTER_HALF_DUPLEX) {
+ msg = &kss->spi_msg2;
+ xfer = kss->spi_xfer2;
+
+ xfer->tx_buf = txb;
+ xfer->rx_buf = NULL;
+ xfer->len = 2;
+
+ xfer++;
+ xfer->tx_buf = NULL;
+ xfer->rx_buf = trx;
+ xfer->len = rxl;
+ } else {
+ msg = &kss->spi_msg1;
+ xfer = &kss->spi_xfer1;
+
+ xfer->tx_buf = txb;
+ xfer->rx_buf = trx;
+ xfer->len = rxl + 2;
+ }
+
+ ret = spi_sync(kss->spidev, msg);
+ if (ret < 0)
+ netdev_err(ks->netdev, "read: spi_sync() failed\n");
+ else if (kss->spidev->master->flags & SPI_MASTER_HALF_DUPLEX)
+ memcpy(rxb, trx, rxl);
+ else
+ memcpy(rxb, trx + 2, rxl);
+}
+
+/**
+ * ks8851_rdreg16_spi - read 16 bit register from device via SPI
+ * @ks: The chip information
+ * @reg: The register address
+ *
+ * Read a 16bit register from the chip, returning the result
+ */
+static unsigned int ks8851_rdreg16_spi(struct ks8851_net *ks, unsigned int reg)
+{
+ __le16 rx = 0;
+
+ ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2);
+ return le16_to_cpu(rx);
+}
+
+/**
+ * ks8851_rdfifo_spi - read data from the receive fifo via SPI
+ * @ks: The device state.
+ * @buff: The buffer address
+ * @len: The length of the data to read
+ *
+ * Issue an RXQ FIFO read command and read the @len amount of data from
+ * the FIFO into the buffer specified by @buff.
+ */
+static void ks8851_rdfifo_spi(struct ks8851_net *ks, u8 *buff, unsigned int len)
+{
+ struct ks8851_net_spi *kss = to_ks8851_spi(ks);
+ struct spi_transfer *xfer = kss->spi_xfer2;
+ struct spi_message *msg = &kss->spi_msg2;
+ u8 txb[1];
+ int ret;
+
+ netif_dbg(ks, rx_status, ks->netdev,
+ "%s: %d@%p\n", __func__, len, buff);
+
+ /* set the operation we're issuing */
+ txb[0] = KS_SPIOP_RXFIFO;
+
+ xfer->tx_buf = txb;
+ xfer->rx_buf = NULL;
+ xfer->len = 1;
+
+ xfer++;
+ xfer->rx_buf = buff;
+ xfer->tx_buf = NULL;
+ xfer->len = len;
+
+ ret = spi_sync(kss->spidev, msg);
+ if (ret < 0)
+ netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__);
+}
+
+/**
+ * ks8851_wrfifo_spi - write packet to TX FIFO via SPI
+ * @ks: The device state.
+ * @txp: The sk_buff to transmit.
+ * @irq: IRQ on completion of the packet.
+ *
+ * Send the @txp to the chip. This means creating the relevant packet header
+ * specifying the length of the packet and the other information the chip
+ * needs, such as IRQ on completion. Send the header and the packet data to
+ * the device.
+ */
+static void ks8851_wrfifo_spi(struct ks8851_net *ks, struct sk_buff *txp,
+ bool irq)
+{
+ struct ks8851_net_spi *kss = to_ks8851_spi(ks);
+ struct spi_transfer *xfer = kss->spi_xfer2;
+ struct spi_message *msg = &kss->spi_msg2;
+ unsigned int fid = 0;
+ int ret;
+
+ netif_dbg(ks, tx_queued, ks->netdev, "%s: skb %p, %d@%p, irq %d\n",
+ __func__, txp, txp->len, txp->data, irq);
+
+ fid = ks->fid++;
+ fid &= TXFR_TXFID_MASK;
+
+ if (irq)
+ fid |= TXFR_TXIC; /* irq on completion */
+
+ /* start header at txb[1] to align txw entries */
+ ks->txh.txb[1] = KS_SPIOP_TXFIFO;
+ ks->txh.txw[1] = cpu_to_le16(fid);
+ ks->txh.txw[2] = cpu_to_le16(txp->len);
+
+ xfer->tx_buf = &ks->txh.txb[1];
+ xfer->rx_buf = NULL;
+ xfer->len = 5;
+
+ xfer++;
+ xfer->tx_buf = txp->data;
+ xfer->rx_buf = NULL;
+ xfer->len = ALIGN(txp->len, 4);
+
+ ret = spi_sync(kss->spidev, msg);
+ if (ret < 0)
+ netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__);
+}
+
+/**
+ * ks8851_rx_skb_spi - receive skbuff
+ * @ks: The device state
+ * @skb: The skbuff
+ */
+static void ks8851_rx_skb_spi(struct ks8851_net *ks, struct sk_buff *skb)
+{
+ netif_rx_ni(skb);
+}
+
+/**
+ * ks8851_tx_work - process tx packet(s)
+ * @work: The work strucutre what was scheduled.
+ *
+ * This is called when a number of packets have been scheduled for
+ * transmission and need to be sent to the device.
+ */
+static void ks8851_tx_work(struct work_struct *work)
+{
+ struct ks8851_net_spi *kss;
+ struct ks8851_net *ks;
+ unsigned long flags;
+ struct sk_buff *txb;
+ bool last;
+
+ kss = container_of(work, struct ks8851_net_spi, tx_work);
+ ks = &kss->ks8851;
+ last = skb_queue_empty(&ks->txq);
+
+ ks8851_lock_spi(ks, &flags);
+
+ while (!last) {
+ txb = skb_dequeue(&ks->txq);
+ last = skb_queue_empty(&ks->txq);
+
+ if (txb) {
+ ks8851_wrreg16_spi(ks, KS_RXQCR,
+ ks->rc_rxqcr | RXQCR_SDA);
+ ks8851_wrfifo_spi(ks, txb, last);
+ ks8851_wrreg16_spi(ks, KS_RXQCR, ks->rc_rxqcr);
+ ks8851_wrreg16_spi(ks, KS_TXQCR, TXQCR_METFE);
+
+ ks8851_done_tx(ks, txb);
+ }
+ }
+
+ ks8851_unlock_spi(ks, &flags);
+}
+
+/**
+ * ks8851_flush_tx_work_spi - flush outstanding TX work
+ * @ks: The device state
+ */
+static void ks8851_flush_tx_work_spi(struct ks8851_net *ks)
+{
+ struct ks8851_net_spi *kss = to_ks8851_spi(ks);
+
+ flush_work(&kss->tx_work);
+}
+
+/**
+ * calc_txlen - calculate size of message to send packet
+ * @len: Length of data
+ *
+ * Returns the size of the TXFIFO message needed to send
+ * this packet.
+ */
+static unsigned int calc_txlen(unsigned int len)
+{
+ return ALIGN(len + 4, 4);
+}
+
+/**
+ * ks8851_start_xmit_spi - transmit packet using SPI
+ * @skb: The buffer to transmit
+ * @dev: The device used to transmit the packet.
+ *
+ * Called by the network layer to transmit the @skb. Queue the packet for
+ * the device and schedule the necessary work to transmit the packet when
+ * it is free.
+ *
+ * We do this to firstly avoid sleeping with the network device locked,
+ * and secondly so we can round up more than one packet to transmit which
+ * means we can try and avoid generating too many transmit done interrupts.
+ */
+static netdev_tx_t ks8851_start_xmit_spi(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ unsigned int needed = calc_txlen(skb->len);
+ struct ks8851_net *ks = netdev_priv(dev);
+ netdev_tx_t ret = NETDEV_TX_OK;
+ struct ks8851_net_spi *kss;
+
+ kss = to_ks8851_spi(ks);
+
+ netif_dbg(ks, tx_queued, ks->netdev,
+ "%s: skb %p, %d@%p\n", __func__, skb, skb->len, skb->data);
+
+ spin_lock(&ks->statelock);
+
+ if (needed > ks->tx_space) {
+ netif_stop_queue(dev);
+ ret = NETDEV_TX_BUSY;
+ } else {
+ ks->tx_space -= needed;
+ skb_queue_tail(&ks->txq, skb);
+ }
+
+ spin_unlock(&ks->statelock);
+ schedule_work(&kss->tx_work);
+
+ return ret;
+}
+
+static int ks8851_probe_spi(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct ks8851_net_spi *kss;
+ struct net_device *netdev;
+ struct ks8851_net *ks;
+
+ netdev = devm_alloc_etherdev(dev, sizeof(struct ks8851_net_spi));
+ if (!netdev)
+ return -ENOMEM;
+
+ spi->bits_per_word = 8;
+
+ ks = netdev_priv(netdev);
+
+ ks->lock = ks8851_lock_spi;
+ ks->unlock = ks8851_unlock_spi;
+ ks->rdreg16 = ks8851_rdreg16_spi;
+ ks->wrreg16 = ks8851_wrreg16_spi;
+ ks->rdfifo = ks8851_rdfifo_spi;
+ ks->wrfifo = ks8851_wrfifo_spi;
+ ks->start_xmit = ks8851_start_xmit_spi;
+ ks->rx_skb = ks8851_rx_skb_spi;
+ ks->flush_tx_work = ks8851_flush_tx_work_spi;
+
+#define STD_IRQ (IRQ_LCI | /* Link Change */ \
+ IRQ_TXI | /* TX done */ \
+ IRQ_RXI | /* RX done */ \
+ IRQ_SPIBEI | /* SPI bus error */ \
+ IRQ_TXPSI | /* TX process stop */ \
+ IRQ_RXPSI) /* RX process stop */
+ ks->rc_ier = STD_IRQ;
+
+ kss = to_ks8851_spi(ks);
+
+ kss->spidev = spi;
+ mutex_init(&kss->lock);
+ INIT_WORK(&kss->tx_work, ks8851_tx_work);
+
+ /* initialise pre-made spi transfer messages */
+ spi_message_init(&kss->spi_msg1);
+ spi_message_add_tail(&kss->spi_xfer1, &kss->spi_msg1);
+
+ spi_message_init(&kss->spi_msg2);
+ spi_message_add_tail(&kss->spi_xfer2[0], &kss->spi_msg2);
+ spi_message_add_tail(&kss->spi_xfer2[1], &kss->spi_msg2);
+
+ netdev->irq = spi->irq;
+
+ return ks8851_probe_common(netdev, dev, msg_enable);
+}
+
+static int ks8851_remove_spi(struct spi_device *spi)
+{
+ return ks8851_remove_common(&spi->dev);
+}
+
+static const struct of_device_id ks8851_match_table[] = {
+ { .compatible = "micrel,ks8851" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ks8851_match_table);
+
+static struct spi_driver ks8851_driver = {
+ .driver = {
+ .name = "ks8851",
+ .of_match_table = ks8851_match_table,
+ .pm = &ks8851_pm_ops,
+ },
+ .probe = ks8851_probe_spi,
+ .remove = ks8851_remove_spi,
+};
+module_spi_driver(ks8851_driver);
+
+MODULE_DESCRIPTION("KS8851 Network driver");
+MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
+MODULE_LICENSE("GPL");
+
+module_param_named(message, msg_enable, int, 0);
+MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)");
+MODULE_ALIAS("spi:ks8851");
projects / kernel.git / commitdiff