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@@ -0,0 +1,1322 @@
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+/* drivers/net/ks8651.c
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+ *
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+ * Copyright 2009 Simtec Electronics
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+ * http://www.simtec.co.uk/
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+ * Ben Dooks <ben@simtec.co.uk>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#define DEBUG
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+
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+#include <linux/module.h>
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+#include <linux/kernel.h>
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+#include <linux/netdevice.h>
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+#include <linux/etherdevice.h>
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+#include <linux/ethtool.h>
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+#include <linux/cache.h>
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+#include <linux/crc32.h>
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+#include <linux/mii.h>
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+
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+#include <linux/spi/spi.h>
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+
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+#include "ks8851.h"
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+
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+/**
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+ * struct ks8851_rxctrl - KS8851 driver rx control
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+ * @mchash: Multicast hash-table data.
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+ * @rxcr1: KS_RXCR1 register setting
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+ * @rxcr2: KS_RXCR2 register setting
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+ *
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+ * Representation of the settings needs to control the receive filtering
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+ * such as the multicast hash-filter and the receive register settings. This
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+ * is used to make the job of working out if the receive settings change and
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+ * then issuing the new settings to the worker that will send the necessary
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+ * commands.
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+ */
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+struct ks8851_rxctrl {
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+ u16 mchash[4];
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+ u16 rxcr1;
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+ u16 rxcr2;
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+};
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+
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+/**
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+ * union ks8851_tx_hdr - tx header data
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+ * @txb: The header as bytes
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+ * @txw: The header as 16bit, little-endian words
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+ *
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+ * A dual representation of the tx header data to allow
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+ * access to individual bytes, and to allow 16bit accesses
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+ * with 16bit alignment.
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+ */
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+union ks8851_tx_hdr {
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+ u8 txb[6];
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+ __le16 txw[3];
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+};
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+
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+/**
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+ * struct ks8851_net - KS8851 driver private data
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+ * @netdev: The network device we're bound to
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+ * @spidev: The spi device we're bound to.
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+ * @lock: Lock to ensure that the device is not accessed when busy.
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+ * @statelock: Lock on this structure for tx list.
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+ * @mii: The MII state information for the mii calls.
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+ * @rxctrl: RX settings for @rxctrl_work.
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+ * @tx_work: Work queue for tx packets
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+ * @irq_work: Work queue for servicing interrupts
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+ * @rxctrl_work: Work queue for updating RX mode and multicast lists
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+ * @txq: Queue of packets for transmission.
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+ * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1.
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+ * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2.
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+ * @txh: Space for generating packet TX header in DMA-able data
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+ * @rxd: Space for receiving SPI data, in DMA-able space.
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+ * @txd: Space for transmitting SPI data, in DMA-able space.
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+ * @msg_enable: The message flags controlling driver output (see ethtool).
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+ * @fid: Incrementing frame id tag.
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+ * @rc_ier: Cached copy of KS_IER.
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+ * @rc_rxqcr: Cached copy of KS_RXQCR.
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+ *
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+ * The @lock ensures that the chip is protected when certain operations are
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+ * in progress. When the read or write packet transfer is in progress, most
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+ * of the chip registers are not ccessible until the transfer is finished and
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+ * the DMA has been de-asserted.
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+ *
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+ * The @statelock is used to protect information in the structure which may
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+ * need to be accessed via several sources, such as the network driver layer
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+ * or one of the work queues.
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+ *
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+ * We align the buffers we may use for rx/tx to ensure that if the SPI driver
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+ * wants to DMA map them, it will not have any problems with data the driver
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+ * modifies.
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+ */
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+struct ks8851_net {
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+ struct net_device *netdev;
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+ struct spi_device *spidev;
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+ struct mutex lock;
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+ spinlock_t statelock;
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+
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+ union ks8851_tx_hdr txh ____cacheline_aligned;
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+ u8 rxd[8];
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+ u8 txd[8];
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+
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+ u32 msg_enable ____cacheline_aligned;
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+ u16 tx_space;
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+ u8 fid;
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+
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+ u16 rc_ier;
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+ u16 rc_rxqcr;
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+
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+ struct mii_if_info mii;
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+ struct ks8851_rxctrl rxctrl;
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+
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+ struct work_struct tx_work;
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+ struct work_struct irq_work;
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+ struct work_struct rxctrl_work;
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+
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+ struct sk_buff_head txq;
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+
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+ struct spi_message spi_msg1;
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+ struct spi_message spi_msg2;
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+ struct spi_transfer spi_xfer1;
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+ struct spi_transfer spi_xfer2[2];
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+};
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+
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+static int msg_enable;
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+
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+#define ks_info(_ks, _msg...) dev_info(&(_ks)->spidev->dev, _msg)
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+#define ks_warn(_ks, _msg...) dev_warn(&(_ks)->spidev->dev, _msg)
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+#define ks_dbg(_ks, _msg...) dev_dbg(&(_ks)->spidev->dev, _msg)
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+#define ks_err(_ks, _msg...) dev_err(&(_ks)->spidev->dev, _msg)
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+
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+/* shift for byte-enable data */
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+#define BYTE_EN(_x) ((_x) << 2)
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+
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+/* turn register number and byte-enable mask into data for start of packet */
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+#define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6)
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+
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+/* SPI register read/write calls.
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+ *
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+ * All these calls issue SPI transactions to access the chip's registers. They
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+ * all require that the necessary lock is held to prevent accesses when the
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+ * chip is busy transfering packet data (RX/TX FIFO accesses).
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+ */
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+
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+/**
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+ * ks8851_wrreg16 - write 16bit register value to chip
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+ * @ks: The chip state
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+ * @reg: The register address
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+ * @val: The value to write
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+ *
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+ * Issue a write to put the value @val into the register specified in @reg.
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+ */
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+static void ks8851_wrreg16(struct ks8851_net *ks, unsigned reg, unsigned val)
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+{
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+ struct spi_transfer *xfer = &ks->spi_xfer1;
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+ struct spi_message *msg = &ks->spi_msg1;
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+ __le16 txb[2];
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+ int ret;
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+
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+ txb[0] = cpu_to_le16(MK_OP(reg & 2 ? 0xC : 0x03, reg) | KS_SPIOP_WR);
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+ txb[1] = cpu_to_le16(val);
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+
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+ xfer->tx_buf = txb;
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+ xfer->rx_buf = NULL;
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+ xfer->len = 4;
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+
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+ ret = spi_sync(ks->spidev, msg);
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+ if (ret < 0)
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+ ks_err(ks, "spi_sync() failed\n");
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+}
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+
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+/**
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+ * ks8851_rx_1msg - select whether to use one or two messages for spi read
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+ * @ks: The device structure
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+ *
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+ * Return whether to generate a single message with a tx and rx buffer
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+ * supplied to spi_sync(), or alternatively send the tx and rx buffers
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+ * as separate messages.
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+ *
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+ * Depending on the hardware in use, a single message may be more efficient
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+ * on interrupts or work done by the driver.
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+ *
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+ * This currently always returns true until we add some per-device data passed
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+ * from the platform code to specify which mode is better.
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+ */
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+static inline bool ks8851_rx_1msg(struct ks8851_net *ks)
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+{
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+ return true;
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+}
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+
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+/**
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+ * ks8851_rdreg - issue read register command and return the data
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+ * @ks: The device state
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+ * @op: The register address and byte enables in message format.
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+ * @rxb: The RX buffer to return the result into
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+ * @rxl: The length of data expected.
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+ *
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+ * This is the low level read call that issues the necessary spi message(s)
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+ * to read data from the register specified in @op.
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+ */
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+static void ks8851_rdreg(struct ks8851_net *ks, unsigned op,
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+ u8 *rxb, unsigned rxl)
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+{
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+ struct spi_transfer *xfer;
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+ struct spi_message *msg;
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+ __le16 *txb = (__le16 *)ks->txd;
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+ u8 *trx = ks->rxd;
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+ int ret;
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+
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+ txb[0] = cpu_to_le16(op | KS_SPIOP_RD);
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+
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+ if (ks8851_rx_1msg(ks)) {
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+ msg = &ks->spi_msg1;
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+ xfer = &ks->spi_xfer1;
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+
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+ xfer->tx_buf = txb;
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+ xfer->rx_buf = trx;
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+ xfer->len = rxl + 2;
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+ } else {
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+ msg = &ks->spi_msg2;
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+ xfer = ks->spi_xfer2;
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+
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+ xfer->tx_buf = txb;
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+ xfer->rx_buf = NULL;
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+ xfer->len = 2;
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+
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+ xfer++;
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+ xfer->tx_buf = NULL;
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+ xfer->rx_buf = trx;
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+ xfer->len = rxl;
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+ }
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+
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+ ret = spi_sync(ks->spidev, msg);
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+ if (ret < 0)
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+ ks_err(ks, "read: spi_sync() failed\n");
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+ else if (ks8851_rx_1msg(ks))
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+ memcpy(rxb, trx + 2, rxl);
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+ else
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+ memcpy(rxb, trx, rxl);
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+}
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+
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+/**
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+ * ks8851_rdreg8 - read 8 bit register from device
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+ * @ks: The chip information
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+ * @reg: The register address
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+ *
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+ * Read a 8bit register from the chip, returning the result
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+*/
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+static unsigned ks8851_rdreg8(struct ks8851_net *ks, unsigned reg)
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+{
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+ u8 rxb[1];
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+
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+ ks8851_rdreg(ks, MK_OP(1 << (reg & 3), reg), rxb, 1);
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+ return rxb[0];
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+}
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+
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+/**
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+ * ks8851_rdreg16 - read 16 bit register from device
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+ * @ks: The chip information
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+ * @reg: The register address
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+ *
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+ * Read a 16bit register from the chip, returning the result
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+*/
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+static unsigned ks8851_rdreg16(struct ks8851_net *ks, unsigned reg)
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+{
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+ __le16 rx = 0;
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+
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+ ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2);
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+ return le16_to_cpu(rx);
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+}
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+
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+/**
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+ * ks8851_rdreg32 - read 32 bit register from device
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+ * @ks: The chip information
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+ * @reg: The register address
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+ *
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+ * Read a 32bit register from the chip.
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+ *
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+ * Note, this read requires the address be aligned to 4 bytes.
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+*/
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+static unsigned ks8851_rdreg32(struct ks8851_net *ks, unsigned reg)
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+{
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+ __le32 rx = 0;
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+
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+ WARN_ON(reg & 3);
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+
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+ ks8851_rdreg(ks, MK_OP(0xf, reg), (u8 *)&rx, 4);
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+ return le32_to_cpu(rx);
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+}
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+
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+/**
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+ * ks8851_soft_reset - issue one of the soft reset to the device
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+ * @ks: The device state.
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+ * @op: The bit(s) to set in the GRR
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+ *
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+ * Issue the relevant soft-reset command to the device's GRR register
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+ * specified by @op.
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+ *
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+ * Note, the delays are in there as a caution to ensure that the reset
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+ * has time to take effect and then complete. Since the datasheet does
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+ * not currently specify the exact sequence, we have chosen something
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+ * that seems to work with our device.
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+ */
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+static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op)
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+{
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+ ks8851_wrreg16(ks, KS_GRR, op);
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+ mdelay(1); /* wait a short time to effect reset */
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+ ks8851_wrreg16(ks, KS_GRR, 0);
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+ mdelay(1); /* wait for condition to clear */
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+}
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+
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+/**
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+ * ks8851_write_mac_addr - write mac address to device registers
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+ * @dev: The network device
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+ *
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+ * Update the KS8851 MAC address registers from the address in @dev.
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+ *
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+ * This call assumes that the chip is not running, so there is no need to
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+ * shutdown the RXQ process whilst setting this.
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+*/
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+static int ks8851_write_mac_addr(struct net_device *dev)
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+{
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+ struct ks8851_net *ks = netdev_priv(dev);
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+ u16 *mcp = (u16 *)dev->dev_addr;
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+
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+ mutex_lock(&ks->lock);
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+
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+ ks8851_wrreg16(ks, KS_MARL, mcp[0]);
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+ ks8851_wrreg16(ks, KS_MARM, mcp[1]);
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+ ks8851_wrreg16(ks, KS_MARH, mcp[2]);
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+
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+ mutex_unlock(&ks->lock);
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+
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+ return 0;
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+}
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+
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+/**
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+ * ks8851_init_mac - initialise the mac address
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+ * @ks: The device structure
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+ *
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+ * Get or create the initial mac address for the device and then set that
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+ * into the station address register. Currently we assume that the device
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+ * does not have a valid mac address in it, and so we use random_ether_addr()
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+ * to create a new one.
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+ *
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+ * In future, the driver should check to see if the device has an EEPROM
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+ * attached and whether that has a valid ethernet address in it.
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+ */
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+static void ks8851_init_mac(struct ks8851_net *ks)
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+{
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+ struct net_device *dev = ks->netdev;
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+
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+ random_ether_addr(dev->dev_addr);
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+ ks8851_write_mac_addr(dev);
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+}
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+
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+/**
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+ * ks8851_irq - device interrupt handler
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+ * @irq: Interrupt number passed from the IRQ hnalder.
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+ * @pw: The private word passed to register_irq(), our struct ks8851_net.
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+ *
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+ * Disable the interrupt from happening again until we've processed the
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+ * current status by scheduling ks8851_irq_work().
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+ */
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+static irqreturn_t ks8851_irq(int irq, void *pw)
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+{
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+ struct ks8851_net *ks = pw;
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+
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+ disable_irq_nosync(irq);
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+ schedule_work(&ks->irq_work);
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+ return IRQ_HANDLED;
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+}
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+
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+/**
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+ * ks8851_rdfifo - read data from the receive fifo
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+ * @ks: The device state.
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+ * @buff: The buffer address
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+ * @len: The length of the data to read
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+ *
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+ * Issue an RXQ FIFO read command and read the @len ammount of data from
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+ * the FIFO into the buffer specified by @buff.
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+ */
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+static void ks8851_rdfifo(struct ks8851_net *ks, u8 *buff, unsigned len)
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+{
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+ struct spi_transfer *xfer = ks->spi_xfer2;
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+ struct spi_message *msg = &ks->spi_msg2;
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+ u8 txb[1];
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+ int ret;
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+
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+ if (netif_msg_rx_status(ks))
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|
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+ ks_dbg(ks, "%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)
|
|
|
+ ks_err(ks, "%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)
|
|
|
+{
|
|
|
+ ks_dbg(ks, "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);
|
|
|
+
|
|
|
+ if (netif_msg_rx_status(ks))
|
|
|
+ ks_dbg(ks, "%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 comming from the chip.
|
|
|
+ */
|
|
|
+
|
|
|
+ for (; rxfc != 0; rxfc--) {
|
|
|
+ rxh = ks8851_rdreg32(ks, KS_RXFHSR);
|
|
|
+ rxstat = rxh & 0xffff;
|
|
|
+ rxlen = rxh >> 16;
|
|
|
+
|
|
|
+ if (netif_msg_rx_status(ks))
|
|
|
+ ks_dbg(ks, "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 the packet dma process, and set auto-dequeue rx */
|
|
|
+ ks8851_wrreg16(ks, KS_RXQCR,
|
|
|
+ ks->rc_rxqcr | RXQCR_SDA | RXQCR_ADRFE);
|
|
|
+
|
|
|
+ if (rxlen > 0) {
|
|
|
+ skb = netdev_alloc_skb(ks->netdev, rxlen + 2 + 8);
|
|
|
+ if (!skb) {
|
|
|
+ /* todo - dump frame and move on */
|
|
|
+ }
|
|
|
+
|
|
|
+ /* two bytes to ensure ip is aligned, and four bytes
|
|
|
+ * for the status header and 4 bytes of garbage */
|
|
|
+ skb_reserve(skb, 2 + 4 + 4);
|
|
|
+
|
|
|
+ rxpkt = skb_put(skb, rxlen - 4) - 8;
|
|
|
+
|
|
|
+ /* align the packet length to 4 bytes, and add 4 bytes
|
|
|
+ * as we're getting the rx status header as well */
|
|
|
+ ks8851_rdfifo(ks, rxpkt, ALIGN(rxlen, 4) + 8);
|
|
|
+
|
|
|
+ if (netif_msg_pktdata(ks))
|
|
|
+ ks8851_dbg_dumpkkt(ks, rxpkt);
|
|
|
+
|
|
|
+ skb->protocol = eth_type_trans(skb, ks->netdev);
|
|
|
+ netif_rx(skb);
|
|
|
+
|
|
|
+ ks->netdev->stats.rx_packets++;
|
|
|
+ ks->netdev->stats.rx_bytes += rxlen - 4;
|
|
|
+ }
|
|
|
+
|
|
|
+ ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * ks8851_irq_work - work queue handler for dealing with interrupt requests
|
|
|
+ * @work: The work structure that was scheduled by schedule_work()
|
|
|
+ *
|
|
|
+ * This is the handler invoked when the ks8851_irq() is called to find out
|
|
|
+ * what happened, as we cannot allow ourselves to sleep whilst waiting for
|
|
|
+ * anything other process has the chip's lock.
|
|
|
+ *
|
|
|
+ * Read the interrupt status, work out what needs to be done and then clear
|
|
|
+ * any of the interrupts that are not needed.
|
|
|
+ */
|
|
|
+static void ks8851_irq_work(struct work_struct *work)
|
|
|
+{
|
|
|
+ struct ks8851_net *ks = container_of(work, struct ks8851_net, irq_work);
|
|
|
+ unsigned status;
|
|
|
+ unsigned handled = 0;
|
|
|
+
|
|
|
+ mutex_lock(&ks->lock);
|
|
|
+
|
|
|
+ status = ks8851_rdreg16(ks, KS_ISR);
|
|
|
+
|
|
|
+ if (netif_msg_intr(ks))
|
|
|
+ dev_dbg(&ks->spidev->dev, "%s: status 0x%04x\n",
|
|
|
+ __func__, status);
|
|
|
+
|
|
|
+ if (status & IRQ_LCI) {
|
|
|
+ /* should do something about checking link status */
|
|
|
+ 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);
|
|
|
+
|
|
|
+ if (netif_msg_intr(ks))
|
|
|
+ ks_dbg(ks, "%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_TXI)
|
|
|
+ netif_wake_queue(ks->netdev);
|
|
|
+
|
|
|
+ enable_irq(ks->netdev->irq);
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * calc_txlen - calculate size of message to send packet
|
|
|
+ * @len: Lenght 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;
|
|
|
+
|
|
|
+ if (netif_msg_tx_queued(ks))
|
|
|
+ dev_dbg(&ks->spidev->dev, "%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)
|
|
|
+ ks_err(ks, "%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 = false;
|
|
|
+
|
|
|
+ mutex_lock(&ks->lock);
|
|
|
+
|
|
|
+ while (!last) {
|
|
|
+ txb = skb_dequeue(&ks->txq);
|
|
|
+ last = skb_queue_empty(&ks->txq);
|
|
|
+
|
|
|
+ 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_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;
|
|
|
+
|
|
|
+ if (netif_msg_hw(ks))
|
|
|
+ ks_dbg(ks, "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_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);
|
|
|
+
|
|
|
+ /* lock the card, even if we may not actually be doing anything
|
|
|
+ * else at the moment */
|
|
|
+ mutex_lock(&ks->lock);
|
|
|
+
|
|
|
+ if (netif_msg_ifup(ks))
|
|
|
+ ks_dbg(ks, "opening %s\n", dev->name);
|
|
|
+
|
|
|
+ /* 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);
|
|
|
+
|
|
|
+ if (netif_msg_ifup(ks))
|
|
|
+ ks_dbg(ks, "network device %s up\n", dev->name);
|
|
|
+
|
|
|
+ mutex_unlock(&ks->lock);
|
|
|
+ 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);
|
|
|
+
|
|
|
+ if (netif_msg_ifdown(ks))
|
|
|
+ ks_info(ks, "%s: shutting down\n", dev->name);
|
|
|
+
|
|
|
+ netif_stop_queue(dev);
|
|
|
+
|
|
|
+ mutex_lock(&ks->lock);
|
|
|
+
|
|
|
+ /* stop any outstanding work */
|
|
|
+ flush_work(&ks->irq_work);
|
|
|
+ flush_work(&ks->tx_work);
|
|
|
+ flush_work(&ks->rxctrl_work);
|
|
|
+
|
|
|
+ /* turn off the IRQs and ack any outstanding */
|
|
|
+ ks8851_wrreg16(ks, KS_IER, 0x0000);
|
|
|
+ ks8851_wrreg16(ks, KS_ISR, 0xffff);
|
|
|
+
|
|
|
+ /* 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);
|
|
|
+
|
|
|
+ /* ensure any queued tx buffers are dumped */
|
|
|
+ while (!skb_queue_empty(&ks->txq)) {
|
|
|
+ struct sk_buff *txb = skb_dequeue(&ks->txq);
|
|
|
+
|
|
|
+ if (netif_msg_ifdown(ks))
|
|
|
+ ks_dbg(ks, "%s: freeing txb %p\n", __func__, txb);
|
|
|
+
|
|
|
+ dev_kfree_skb(txb);
|
|
|
+ }
|
|
|
+
|
|
|
+ mutex_unlock(&ks->lock);
|
|
|
+ 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 int ks8851_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
|
+{
|
|
|
+ struct ks8851_net *ks = netdev_priv(dev);
|
|
|
+ unsigned needed = calc_txlen(skb->len);
|
|
|
+ int ret = NETDEV_TX_OK;
|
|
|
+
|
|
|
+ if (netif_msg_tx_queued(ks))
|
|
|
+ ks_dbg(ks, "%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 && dev->mc_count > 0) {
|
|
|
+ struct dev_mc_list *mcptr = dev->mc_list;
|
|
|
+ u32 crc;
|
|
|
+ int i;
|
|
|
+
|
|
|
+ /* accept some multicast */
|
|
|
+
|
|
|
+ for (i = dev->mc_count; i > 0; i--) {
|
|
|
+ crc = ether_crc(ETH_ALEN, mcptr->dmi_addr);
|
|
|
+ crc >>= (32 - 6); /* get top six bits */
|
|
|
+
|
|
|
+ rxctrl.mchash[crc >> 4] |= (1 << (crc & 0xf));
|
|
|
+ mcptr = mcptr->next;
|
|
|
+ }
|
|
|
+
|
|
|
+ rxctrl.rxcr1 = RXCR1_RXME | RXCR1_RXAE | 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_change_mtu = eth_change_mtu,
|
|
|
+ .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_settings(struct net_device *dev, struct ethtool_cmd *cmd)
|
|
|
+{
|
|
|
+ struct ks8851_net *ks = netdev_priv(dev);
|
|
|
+ return mii_ethtool_gset(&ks->mii, cmd);
|
|
|
+}
|
|
|
+
|
|
|
+static int ks8851_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
|
|
|
+{
|
|
|
+ struct ks8851_net *ks = netdev_priv(dev);
|
|
|
+ return mii_ethtool_sset(&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);
|
|
|
+}
|
|
|
+
|
|
|
+static const struct ethtool_ops ks8851_ethtool_ops = {
|
|
|
+ .get_drvinfo = ks8851_get_drvinfo,
|
|
|
+ .get_msglevel = ks8851_get_msglevel,
|
|
|
+ .set_msglevel = ks8851_set_msglevel,
|
|
|
+ .get_settings = ks8851_get_settings,
|
|
|
+ .set_settings = ks8851_set_settings,
|
|
|
+ .get_link = ks8851_get_link,
|
|
|
+ .nway_reset = ks8851_nway_reset,
|
|
|
+};
|
|
|
+
|
|
|
+/* 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-existant 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) {
|
|
|
+ ks_warn(ks, "Memory selftest not finished\n");
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (rd & MBIR_TXMBFA) {
|
|
|
+ ks_err(ks, "TX memory selftest fail\n");
|
|
|
+ ret |= 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (rd & MBIR_RXMBFA) {
|
|
|
+ ks_err(ks, "RX memory selftest fail\n");
|
|
|
+ ret |= 2;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/* driver bus management functions */
|
|
|
+
|
|
|
+static int __devinit ks8851_probe(struct spi_device *spi)
|
|
|
+{
|
|
|
+ struct net_device *ndev;
|
|
|
+ struct ks8851_net *ks;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ ndev = alloc_etherdev(sizeof(struct ks8851_net));
|
|
|
+ if (!ndev) {
|
|
|
+ dev_err(&spi->dev, "failed to alloc ethernet device\n");
|
|
|
+ return -ENOMEM;
|
|
|
+ }
|
|
|
+
|
|
|
+ spi->bits_per_word = 8;
|
|
|
+
|
|
|
+ ks = netdev_priv(ndev);
|
|
|
+
|
|
|
+ ks->netdev = ndev;
|
|
|
+ ks->spidev = spi;
|
|
|
+ ks->tx_space = 6144;
|
|
|
+
|
|
|
+ mutex_init(&ks->lock);
|
|
|
+ spin_lock_init(&ks->statelock);
|
|
|
+
|
|
|
+ INIT_WORK(&ks->tx_work, ks8851_tx_work);
|
|
|
+ INIT_WORK(&ks->irq_work, ks8851_irq_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 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);
|
|
|
+
|
|
|
+ SET_ETHTOOL_OPS(ndev, &ks8851_ethtool_ops);
|
|
|
+ SET_NETDEV_DEV(ndev, &spi->dev);
|
|
|
+
|
|
|
+ dev_set_drvdata(&spi->dev, ks);
|
|
|
+
|
|
|
+ ndev->if_port = IF_PORT_100BASET;
|
|
|
+ ndev->netdev_ops = &ks8851_netdev_ops;
|
|
|
+ ndev->irq = spi->irq;
|
|
|
+
|
|
|
+ /* simple check for a valid chip being connected to the bus */
|
|
|
+
|
|
|
+ if ((ks8851_rdreg16(ks, KS_CIDER) & ~CIDER_REV_MASK) != CIDER_ID) {
|
|
|
+ dev_err(&spi->dev, "failed to read device ID\n");
|
|
|
+ ret = -ENODEV;
|
|
|
+ goto err_id;
|
|
|
+ }
|
|
|
+
|
|
|
+ ks8851_read_selftest(ks);
|
|
|
+ ks8851_init_mac(ks);
|
|
|
+
|
|
|
+ ret = request_irq(spi->irq, ks8851_irq, IRQF_TRIGGER_LOW,
|
|
|
+ ndev->name, ks);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(&spi->dev, "failed to get irq\n");
|
|
|
+ goto err_irq;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = register_netdev(ndev);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(&spi->dev, "failed to register network device\n");
|
|
|
+ goto err_netdev;
|
|
|
+ }
|
|
|
+
|
|
|
+ dev_info(&spi->dev, "revision %d, MAC %pM, IRQ %d\n",
|
|
|
+ CIDER_REV_GET(ks8851_rdreg16(ks, KS_CIDER)),
|
|
|
+ ndev->dev_addr, ndev->irq);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+
|
|
|
+
|
|
|
+err_netdev:
|
|
|
+ free_irq(ndev->irq, ndev);
|
|
|
+
|
|
|
+err_id:
|
|
|
+err_irq:
|
|
|
+ free_netdev(ndev);
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static int __devexit ks8851_remove(struct spi_device *spi)
|
|
|
+{
|
|
|
+ struct ks8851_net *priv = dev_get_drvdata(&spi->dev);
|
|
|
+
|
|
|
+ if (netif_msg_drv(priv))
|
|
|
+ dev_info(&spi->dev, "remove");
|
|
|
+
|
|
|
+ unregister_netdev(priv->netdev);
|
|
|
+ free_irq(spi->irq, priv);
|
|
|
+ free_netdev(priv->netdev);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static struct spi_driver ks8851_driver = {
|
|
|
+ .driver = {
|
|
|
+ .name = "ks8851",
|
|
|
+ .owner = THIS_MODULE,
|
|
|
+ },
|
|
|
+ .probe = ks8851_probe,
|
|
|
+ .remove = __devexit_p(ks8851_remove),
|
|
|
+};
|
|
|
+
|
|
|
+static int __init ks8851_init(void)
|
|
|
+{
|
|
|
+ return spi_register_driver(&ks8851_driver);
|
|
|
+}
|
|
|
+
|
|
|
+static void __exit ks8851_exit(void)
|
|
|
+{
|
|
|
+ spi_unregister_driver(&ks8851_driver);
|
|
|
+}
|
|
|
+
|
|
|
+module_init(ks8851_init);
|
|
|
+module_exit(ks8851_exit);
|
|
|
+
|
|
|
+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)");
|
Linus Torvalds