diff options
Diffstat (limited to 'drivers/net/ethernet/micrel/ks8851.c')
| -rw-r--r-- | drivers/net/ethernet/micrel/ks8851.c | 1613 |
1 files changed, 0 insertions, 1613 deletions
diff --git a/drivers/net/ethernet/micrel/ks8851.c b/drivers/net/ethernet/micrel/ks8851.c deleted file mode 100644 index 33305c9c5a62..000000000000 --- a/drivers/net/ethernet/micrel/ks8851.c +++ /dev/null @@ -1,1613 +0,0 @@ -// 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 - * @spidev: The spi device we're bound to. - * @lock: Lock to ensure that the device is not accessed when busy. - * @statelock: Lock on this structure for tx list. - * @mii: The MII state information for the mii calls. - * @rxctrl: RX settings for @rxctrl_work. - * @tx_work: Work queue for tx packets - * @rxctrl_work: Work queue for updating RX mode and multicast lists - * @txq: Queue of packets for transmission. - * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1. - * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2. - * @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 - * - * 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. - * - * 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; - struct spi_device *spidev; - struct mutex lock; - 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 tx_work; - struct work_struct rxctrl_work; - - struct sk_buff_head txq; - - struct spi_message spi_msg1; - struct spi_message spi_msg2; - struct spi_transfer spi_xfer1; - struct spi_transfer spi_xfer2[2]; - - struct eeprom_93cx6 eeprom; - struct regulator *vdd_reg; - struct regulator *vdd_io; - int gpio; -}; - -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) - -/* 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 - 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 reg, unsigned val) -{ - struct spi_transfer *xfer = &ks->spi_xfer1; - struct spi_message *msg = &ks->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(ks->spidev, msg); - if (ret < 0) - netdev_err(ks->netdev, "spi_sync() failed\n"); -} - -/** - * ks8851_wrreg8 - write 8bit 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_wrreg8(struct ks8851_net *ks, unsigned reg, unsigned val) -{ - struct spi_transfer *xfer = &ks->spi_xfer1; - struct spi_message *msg = &ks->spi_msg1; - __le16 txb[2]; - int ret; - int bit; - - bit = 1 << (reg & 3); - - txb[0] = cpu_to_le16(MK_OP(bit, reg) | KS_SPIOP_WR); - txb[1] = val; - - xfer->tx_buf = txb; - xfer->rx_buf = NULL; - xfer->len = 3; - - ret = spi_sync(ks->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 op, - u8 *rxb, unsigned rxl) -{ - 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 (ks->spidev->master->flags & SPI_MASTER_HALF_DUPLEX) { - msg = &ks->spi_msg2; - xfer = ks->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 = &ks->spi_msg1; - xfer = &ks->spi_xfer1; - - xfer->tx_buf = txb; - xfer->rx_buf = trx; - xfer->len = rxl + 2; - } - - ret = spi_sync(ks->spidev, msg); - if (ret < 0) - netdev_err(ks->netdev, "read: spi_sync() failed\n"); - else if (ks->spidev->master->flags & SPI_MASTER_HALF_DUPLEX) - memcpy(rxb, trx, rxl); - else - memcpy(rxb, trx + 2, rxl); -} - -/** - * ks8851_rdreg8 - read 8 bit register from device - * @ks: The chip information - * @reg: The register address - * - * Read a 8bit register from the chip, returning the result -*/ -static unsigned ks8851_rdreg8(struct ks8851_net *ks, unsigned reg) -{ - u8 rxb[1]; - - ks8851_rdreg(ks, MK_OP(1 << (reg & 3), reg), rxb, 1); - return rxb[0]; -} - -/** - * 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 ks8851_rdreg16(struct ks8851_net *ks, unsigned reg) -{ - __le16 rx = 0; - - ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2); - return le16_to_cpu(rx); -} - -/** - * ks8851_rdreg32 - read 32 bit register from device - * @ks: The chip information - * @reg: The register address - * - * Read a 32bit register from the chip. - * - * Note, this read requires the address be aligned to 4 bytes. -*/ -static unsigned ks8851_rdreg32(struct ks8851_net *ks, unsigned reg) -{ - __le32 rx = 0; - - WARN_ON(reg & 3); - - ks8851_rdreg(ks, MK_OP(0xf, reg), (u8 *)&rx, 4); - return le32_to_cpu(rx); -} - -/** - * 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); - int i; - - mutex_lock(&ks->lock); - - /* - * 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++) - ks8851_wrreg8(ks, KS_MAR(i), dev->dev_addr[i]); - if (!netif_running(dev)) - ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); - - mutex_unlock(&ks->lock); - - 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); - int i; - - mutex_lock(&ks->lock); - - for (i = 0; i < ETH_ALEN; i++) - dev->dev_addr[i] = ks8851_rdreg8(ks, KS_MAR(i)); - - mutex_unlock(&ks->lock); -} - -/** - * ks8851_init_mac - initialise the mac address - * @ks: The device structure - * - * 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 net_device *dev = ks->netdev; - const u8 *mac_addr; - - mac_addr = of_get_mac_address(ks->spidev->dev.of_node); - 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 - read data from the receive fifo - * @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(struct ks8851_net *ks, u8 *buff, unsigned len) -{ - struct spi_transfer *xfer = ks->spi_xfer2; - struct spi_message *msg = &ks->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(ks->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_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; - u32 rxh; - u8 *rxpkt; - - rxfc = ks8851_rdreg8(ks, KS_RXFC); - - 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--) { - rxh = ks8851_rdreg32(ks, KS_RXFHSR); - rxstat = rxh & 0xffff; - rxlen = (rxh >> 16) & 0xfff; - - 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; - - ks8851_rdfifo(ks, rxpkt, rxalign + 8); - - if (netif_msg_pktdata(ks)) - ks8851_dbg_dumpkkt(ks, rxpkt); - - skb->protocol = eth_type_trans(skb, ks->netdev); - netif_rx_ni(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 status; - unsigned handled = 0; - - mutex_lock(&ks->lock); - - 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) { - dev_err(&ks->spidev->dev, "%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); - } - - mutex_unlock(&ks->lock); - - 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 - write packet to TX FIFO - * @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(struct ks8851_net *ks, struct sk_buff *txp, bool irq) -{ - struct spi_transfer *xfer = ks->spi_xfer2; - struct spi_message *msg = &ks->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(ks->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 *ks = container_of(work, struct ks8851_net, tx_work); - struct sk_buff *txb; - bool last = skb_queue_empty(&ks->txq); - - mutex_lock(&ks->lock); - - 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); - ks8851_wrpkt(ks, txb, last); - ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); - ks8851_wrreg16(ks, KS_TXQCR, TXQCR_METFE); - - ks8851_done_tx(ks, txb); - } - } - - mutex_unlock(&ks->lock); -} - -/** - * 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); - 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 */ - mutex_lock(&ks->lock); - - 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 */ - -#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; - ks8851_wrreg16(ks, KS_ISR, STD_IRQ); - ks8851_wrreg16(ks, KS_IER, STD_IRQ); - - netif_start_queue(ks->netdev); - - netif_dbg(ks, ifup, ks->netdev, "network device up\n"); - - mutex_unlock(&ks->lock); - 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); - - netif_info(ks, ifdown, dev, "shutting down\n"); - - netif_stop_queue(dev); - - mutex_lock(&ks->lock); - /* turn off the IRQs and ack any outstanding */ - ks8851_wrreg16(ks, KS_IER, 0x0000); - ks8851_wrreg16(ks, KS_ISR, 0xffff); - mutex_unlock(&ks->lock); - - /* stop any outstanding work */ - flush_work(&ks->tx_work); - flush_work(&ks->rxctrl_work); - - mutex_lock(&ks->lock); - /* 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); - mutex_unlock(&ks->lock); - - /* 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); - unsigned needed = calc_txlen(skb->len); - netdev_tx_t ret = NETDEV_TX_OK; - - 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(&ks->tx_work); - - return ret; -} - -/** - * 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); - - mutex_lock(&ks->lock); - - /* need to shutdown RXQ before modifying filter parameters */ - ks8851_wrreg16(ks, KS_RXCR1, 0x00); - - mutex_unlock(&ks->lock); -} - -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) -{ - if (!(ks->rc_ccr & CCR_EEPROM)) - return -ENOENT; - - mutex_lock(&ks->lock); - - /* 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); - mutex_unlock(&ks->lock); -} - -#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; - 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 (ks8851_eeprom_claim(ks)) - return -ENOENT; - - 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); - - 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; - int len = ee->len; - - /* must be 2 byte aligned */ - if (len & 1 || offset & 1) - return -EINVAL; - - if (ks8851_eeprom_claim(ks)) - return -ENOENT; - - ee->magic = KS_EEPROM_MAGIC; - - eeprom_93cx6_multiread(&ks->eeprom, offset/2, (__le16 *)data, len/2); - ks8851_eeprom_release(ks); - - 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); - int ksreg; - int result; - - ksreg = ks8851_phy_reg(reg); - if (!ksreg) - return 0x0; /* no error return allowed, so use zero */ - - mutex_lock(&ks->lock); - result = ks8851_rdreg16(ks, ksreg); - mutex_unlock(&ks->lock); - - return result; -} - -static void ks8851_phy_write(struct net_device *dev, - int phy, int reg, int value) -{ - struct ks8851_net *ks = netdev_priv(dev); - int ksreg; - - ksreg = ks8851_phy_reg(reg); - if (ksreg) { - mutex_lock(&ks->lock); - ks8851_wrreg16(ks, ksreg, value); - mutex_unlock(&ks->lock); - } -} - -/** - * 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(struct spi_device *spi) -{ - struct net_device *ndev; - struct ks8851_net *ks; - int ret; - unsigned cider; - int gpio; - - ndev = alloc_etherdev(sizeof(struct ks8851_net)); - if (!ndev) - return -ENOMEM; - - spi->bits_per_word = 8; - - ks = netdev_priv(ndev); - - ks->netdev = ndev; - ks->spidev = spi; - ks->tx_space = 6144; - - gpio = of_get_named_gpio_flags(spi->dev.of_node, "reset-gpios", - 0, NULL); - if (gpio == -EPROBE_DEFER) { - ret = gpio; - goto err_gpio; - } - - ks->gpio = gpio; - if (gpio_is_valid(gpio)) { - ret = devm_gpio_request_one(&spi->dev, gpio, - GPIOF_OUT_INIT_LOW, "ks8851_rst_n"); - if (ret) { - dev_err(&spi->dev, "reset gpio request failed\n"); - goto err_gpio; - } - } - - ks->vdd_io = devm_regulator_get(&spi->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(&spi->dev, "regulator vdd_io enable fail: %d\n", - ret); - goto err_reg_io; - } - - ks->vdd_reg = devm_regulator_get(&spi->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(&spi->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); - } - - mutex_init(&ks->lock); - spin_lock_init(&ks->statelock); - - INIT_WORK(&ks->tx_work, ks8851_tx_work); - INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work); - - /* initialise pre-made spi transfer messages */ - - spi_message_init(&ks->spi_msg1); - spi_message_add_tail(&ks->spi_xfer1, &ks->spi_msg1); - - spi_message_init(&ks->spi_msg2); - spi_message_add_tail(&ks->spi_xfer2[0], &ks->spi_msg2); - spi_message_add_tail(&ks->spi_xfer2[1], &ks->spi_msg2); - - /* 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 = ndev; - 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(&spi->dev, "message enable is %d\n", msg_enable); - - /* set the default message enable */ - ks->msg_enable = netif_msg_init(msg_enable, (NETIF_MSG_DRV | - NETIF_MSG_PROBE | - NETIF_MSG_LINK)); - - skb_queue_head_init(&ks->txq); - - ndev->ethtool_ops = &ks8851_ethtool_ops; - SET_NETDEV_DEV(ndev, &spi->dev); - - spi_set_drvdata(spi, ks); - - netif_carrier_off(ks->netdev); - ndev->if_port = IF_PORT_100BASET; - ndev->netdev_ops = &ks8851_netdev_ops; - ndev->irq = spi->irq; - - /* 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(&spi->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); - - ret = register_netdev(ndev); - if (ret) { - dev_err(&spi->dev, "failed to register network device\n"); - goto err_netdev; - } - - netdev_info(ndev, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n", - CIDER_REV_GET(cider), ndev->dev_addr, ndev->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: -err_gpio: - free_netdev(ndev); - return ret; -} - -static int ks8851_remove(struct spi_device *spi) -{ - struct ks8851_net *priv = spi_get_drvdata(spi); - - if (netif_msg_drv(priv)) - dev_info(&spi->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); - free_netdev(priv->netdev); - - return 0; -} - -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"); |