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+/*
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+ * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
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+ *
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+ * (EEPROM code originally implemented for rtl8139.c)
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of the
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+ * License, or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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+ * 02110-1301, USA.
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+ */
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+
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+FILE_LICENCE ( GPL2_OR_LATER );
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+
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+#include <stdint.h>
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+#include <string.h>
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+#include <unistd.h>
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+#include <errno.h>
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+#include <byteswap.h>
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+#include <ipxe/netdevice.h>
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+#include <ipxe/ethernet.h>
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+#include <ipxe/if_ether.h>
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+#include <ipxe/iobuf.h>
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+#include <ipxe/malloc.h>
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+#include <ipxe/pci.h>
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+#include <ipxe/nvs.h>
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+#include <ipxe/threewire.h>
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+#include <ipxe/bitbash.h>
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+#include <ipxe/mii.h>
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+#include "realtek.h"
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+
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+/** @file
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+ *
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+ * Realtek 10/100/1000 network card driver
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+ *
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+ * Based on the following datasheets:
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+ *
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+ * http://www.datasheetarchive.com/dl/Datasheets-8/DSA-153536.pdf
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+ * http://www.datasheetarchive.com/indexdl/Datasheet-028/DSA00494723.pdf
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+ */
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+
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+/******************************************************************************
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+ *
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+ * EEPROM interface
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+ *
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+ ******************************************************************************
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+ */
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+
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+/** Pin mapping for SPI bit-bashing interface */
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+static const uint8_t realtek_eeprom_bits[] = {
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+ [SPI_BIT_SCLK] = RTL_9346CR_EESK,
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+ [SPI_BIT_MOSI] = RTL_9346CR_EEDI,
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+ [SPI_BIT_MISO] = RTL_9346CR_EEDO,
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+ [SPI_BIT_SS(0)] = ( RTL_9346CR_EECS | RTL_9346CR_EEM1 ),
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+};
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+
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+/**
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+ * Read input bit
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+ *
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+ * @v basher Bit-bashing interface
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+ * @v bit_id Bit number
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+ * @ret zero Input is a logic 0
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+ * @ret non-zero Input is a logic 1
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+ */
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+static int realtek_spi_read_bit ( struct bit_basher *basher,
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+ unsigned int bit_id ) {
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+ struct realtek_nic *rtl = container_of ( basher, struct realtek_nic,
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+ spibit.basher );
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+ uint8_t mask = realtek_eeprom_bits[bit_id];
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+ uint8_t reg;
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+
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+ reg = readb ( rtl->regs + RTL_9346CR );
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+ return ( reg & mask );
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+}
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+
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+/**
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+ * Set/clear output bit
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+ *
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+ * @v basher Bit-bashing interface
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+ * @v bit_id Bit number
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+ * @v data Value to write
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+ */
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+static void realtek_spi_write_bit ( struct bit_basher *basher,
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+ unsigned int bit_id, unsigned long data ) {
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+ struct realtek_nic *rtl = container_of ( basher, struct realtek_nic,
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+ spibit.basher );
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+ uint8_t mask = realtek_eeprom_bits[bit_id];
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+ uint8_t reg;
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+
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+ reg = readb ( rtl->regs + RTL_9346CR );
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+ reg &= ~mask;
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+ reg |= ( data & mask );
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+ writeb ( reg, rtl->regs + RTL_9346CR );
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+}
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+
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+/** SPI bit-bashing interface */
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+static struct bit_basher_operations realtek_basher_ops = {
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+ .read = realtek_spi_read_bit,
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+ .write = realtek_spi_write_bit,
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+};
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+
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+/**
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+ * Initialise EEPROM
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+ *
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+ * @v netdev Network device
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+ */
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+static void realtek_init_eeprom ( struct net_device *netdev ) {
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+ struct realtek_nic *rtl = netdev->priv;
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+
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+ /* Initialise SPI bit-bashing interface */
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+ rtl->spibit.basher.op = &realtek_basher_ops;
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+ rtl->spibit.bus.mode = SPI_MODE_THREEWIRE;
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+ init_spi_bit_basher ( &rtl->spibit );
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+
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+ /* Detect EEPROM type and initialise three-wire device */
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+ if ( readl ( rtl->regs + RTL_RCR ) & RTL_RCR_9356SEL ) {
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+ DBGC ( rtl, "REALTEK %p EEPROM is a 93C56\n", rtl );
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+ init_at93c56 ( &rtl->eeprom, 16 );
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+ } else {
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+ DBGC ( rtl, "REALTEK %p EEPROM is a 93C46\n", rtl );
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+ init_at93c46 ( &rtl->eeprom, 16 );
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+ }
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+ rtl->eeprom.bus = &rtl->spibit.bus;
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+
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+ /* Initialise space for non-volatile options, if available
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+ *
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+ * We use offset 0x40 (i.e. address 0x20), length 0x40. This
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+ * block is marked as VPD in the Realtek datasheets, so we use
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+ * it only if we detect that the card is not supporting VPD.
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+ */
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+ if ( readb ( rtl->regs + RTL_CONFIG1 ) & RTL_CONFIG1_VPD ) {
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+ DBGC ( rtl, "REALTEK %p EEPROM in use for VPD; cannot use "
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+ "for options\n", rtl );
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+ } else {
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+ nvo_init ( &rtl->nvo, &rtl->eeprom.nvs, RTL_EEPROM_VPD,
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+ RTL_EEPROM_VPD_LEN, NULL, &netdev->refcnt );
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+ }
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+}
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+
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+/******************************************************************************
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+ *
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+ * MII interface
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+ *
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+ ******************************************************************************
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+ */
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+
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+/**
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+ * Read from MII register
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+ *
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+ * @v mii MII interface
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+ * @v reg Register address
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+ * @ret value Data read, or negative error
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+ */
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+static int realtek_mii_read ( struct mii_interface *mii, unsigned int reg ) {
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+ struct realtek_nic *rtl = container_of ( mii, struct realtek_nic, mii );
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+ unsigned int i;
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+ uint32_t value;
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+
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+ /* Initiate read */
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+ writel ( RTL_PHYAR_VALUE ( 0, reg, 0 ), rtl->regs + RTL_PHYAR );
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+
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+ /* Wait for read to complete */
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+ for ( i = 0 ; i < RTL_MII_MAX_WAIT_US ; i++ ) {
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+
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+ /* If read is not complete, delay 1us and retry */
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+ value = readl ( rtl->regs + RTL_PHYAR );
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+ if ( ! ( value & RTL_PHYAR_FLAG ) ) {
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+ udelay ( 1 );
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+ continue;
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+ }
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+
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+ /* Return register value */
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+ return ( RTL_PHYAR_DATA ( value ) );
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+ }
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+
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+ DBGC ( rtl, "REALTEK %p timed out waiting for MII read\n", rtl );
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+ return -ETIMEDOUT;
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+}
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+
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+/**
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+ * Write to MII register
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+ *
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+ * @v mii MII interface
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+ * @v reg Register address
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+ * @v data Data to write
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+ * @ret rc Return status code
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+ */
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+static int realtek_mii_write ( struct mii_interface *mii, unsigned int reg,
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+ unsigned int data) {
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+ struct realtek_nic *rtl = container_of ( mii, struct realtek_nic, mii );
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+ unsigned int i;
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+
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+ /* Initiate write */
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+ writel ( RTL_PHYAR_VALUE ( RTL_PHYAR_FLAG, reg, data ),
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+ rtl->regs + RTL_PHYAR );
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+
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+ /* Wait for write to complete */
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+ for ( i = 0 ; i < RTL_MII_MAX_WAIT_US ; i++ ) {
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+
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+ /* If write is not complete, delay 1us and retry */
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+ if ( readl ( rtl->regs + RTL_PHYAR ) & RTL_PHYAR_FLAG ) {
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+ udelay ( 1 );
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+ continue;
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+ }
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+
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+ return 0;
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+ }
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+
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+ DBGC ( rtl, "REALTEK %p timed out waiting for MII write\n", rtl );
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+ return -ETIMEDOUT;
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+}
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+
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+/** Realtek MII operations */
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+static struct mii_operations realtek_mii_operations = {
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+ .read = realtek_mii_read,
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+ .write = realtek_mii_write,
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+};
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+
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+/******************************************************************************
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+ *
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+ * Device reset
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+ *
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+ ******************************************************************************
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+ */
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+
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+/**
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+ * Reset hardware
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+ *
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+ * @v rtl Realtek device
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+ * @ret rc Return status code
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+ */
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+static int realtek_reset ( struct realtek_nic *rtl ) {
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+ unsigned int i;
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+
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+ /* Issue reset */
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+ writeb ( RTL_CR_RST, rtl->regs + RTL_CR );
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+
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+ /* Wait for reset to complete */
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+ for ( i = 0 ; i < RTL_RESET_MAX_WAIT_MS ; i++ ) {
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+
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+ /* If reset is not complete, delay 1ms and retry */
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+ if ( readb ( rtl->regs + RTL_CR ) & RTL_CR_RST ) {
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+ mdelay ( 1 );
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+ continue;
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+ }
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+
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+ /* Enable PCI Dual Address Cycle (for 64-bit systems) */
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+ writew ( ( RTL_CPCR_DAC | RTL_CPCR_MULRW ),
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+ rtl->regs + RTL_CPCR );
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+
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+ return 0;
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+ }
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+
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+ DBGC ( rtl, "REALTEK %p timed out waiting for reset\n", rtl );
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+ return -ETIMEDOUT;
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+}
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+
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+/******************************************************************************
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+ *
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+ * Link state
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+ *
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+ ******************************************************************************
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+ */
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+
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+/**
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+ * Check link state
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+ *
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+ * @v netdev Network device
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+ */
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+static void realtek_check_link ( struct net_device *netdev ) {
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+ struct realtek_nic *rtl = netdev->priv;
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+
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+ if ( readb ( rtl->regs + RTL_PHYSTATUS ) & RTL_PHYSTATUS_LINKSTS ) {
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+ netdev_link_up ( netdev );
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+ } else {
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+ netdev_link_down ( netdev );
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+ }
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+}
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+
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+/******************************************************************************
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+ *
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+ * Network device interface
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+ *
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+ ******************************************************************************
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+ */
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+
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+/**
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+ * Create descriptor ring
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+ *
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+ * @v rtl Realtek device
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+ * @v ring Descriptor ring
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+ * @ret rc Return status code
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+ */
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+static int realtek_create_ring ( struct realtek_nic *rtl,
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+ struct realtek_ring *ring ) {
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+ physaddr_t address;
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+
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+ /* Allocate descriptor ring */
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+ ring->desc = malloc_dma ( ring->len, RTL_RING_ALIGN );
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+ if ( ! ring->desc )
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+ return -ENOMEM;
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+
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+ /* Initialise descriptor ring */
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+ memset ( ring->desc, 0, ring->len );
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+
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+ /* Program ring address */
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+ address = virt_to_bus ( ring->desc );
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+ writel ( ( address & 0xffffffffUL ), rtl->regs + ring->reg );
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|
|
318
|
+ if ( sizeof ( physaddr_t ) > sizeof ( uint32_t ) ) {
|
|
|
319
|
+ writel ( ( ( ( uint64_t ) address ) >> 32 ),
|
|
|
320
|
+ rtl->regs + ring->reg + 4 );
|
|
|
321
|
+ }
|
|
|
322
|
+ DBGC ( rtl, "REALTEK %p ring %02x is at [%08llx,%08llx)\n",
|
|
|
323
|
+ rtl, ring->reg, ( ( unsigned long long ) address ),
|
|
|
324
|
+ ( ( unsigned long long ) address + ring->len ) );
|
|
|
325
|
+
|
|
|
326
|
+ return 0;
|
|
|
327
|
+}
|
|
|
328
|
+
|
|
|
329
|
+/**
|
|
|
330
|
+ * Destroy descriptor ring
|
|
|
331
|
+ *
|
|
|
332
|
+ * @v rtl Realtek device
|
|
|
333
|
+ * @v ring Descriptor ring
|
|
|
334
|
+ */
|
|
|
335
|
+static void realtek_destroy_ring ( struct realtek_nic *rtl,
|
|
|
336
|
+ struct realtek_ring *ring ) {
|
|
|
337
|
+
|
|
|
338
|
+ /* Clear ring address */
|
|
|
339
|
+ writel ( 0, rtl->regs + ring->reg );
|
|
|
340
|
+ writel ( 0, rtl->regs + ring->reg + 4 );
|
|
|
341
|
+
|
|
|
342
|
+ /* Free descriptor ring */
|
|
|
343
|
+ free_dma ( ring->desc, ring->len );
|
|
|
344
|
+ ring->desc = NULL;
|
|
|
345
|
+ ring->prod = 0;
|
|
|
346
|
+ ring->cons = 0;
|
|
|
347
|
+}
|
|
|
348
|
+
|
|
|
349
|
+/**
|
|
|
350
|
+ * Refill receive descriptor ring
|
|
|
351
|
+ *
|
|
|
352
|
+ * @v rtl Realtek device
|
|
|
353
|
+ */
|
|
|
354
|
+static void realtek_refill_rx ( struct realtek_nic *rtl ) {
|
|
|
355
|
+ struct realtek_descriptor *rx;
|
|
|
356
|
+ struct io_buffer *iobuf;
|
|
|
357
|
+ unsigned int rx_idx;
|
|
|
358
|
+ physaddr_t address;
|
|
|
359
|
+ int is_last;
|
|
|
360
|
+
|
|
|
361
|
+ while ( ( rtl->rx.prod - rtl->rx.cons ) < RTL_NUM_RX_DESC ) {
|
|
|
362
|
+
|
|
|
363
|
+ /* Allocate I/O buffer */
|
|
|
364
|
+ iobuf = alloc_iob ( RTL_RX_MAX_LEN );
|
|
|
365
|
+ if ( ! iobuf ) {
|
|
|
366
|
+ /* Wait for next refill */
|
|
|
367
|
+ return;
|
|
|
368
|
+ }
|
|
|
369
|
+
|
|
|
370
|
+ /* Get next receive descriptor */
|
|
|
371
|
+ rx_idx = ( rtl->rx.prod++ % RTL_NUM_RX_DESC );
|
|
|
372
|
+ is_last = ( rx_idx == ( RTL_NUM_RX_DESC - 1 ) );
|
|
|
373
|
+ rx = &rtl->rx.desc[rx_idx];
|
|
|
374
|
+
|
|
|
375
|
+ /* Populate receive descriptor */
|
|
|
376
|
+ address = virt_to_bus ( iobuf->data );
|
|
|
377
|
+ rx->address = cpu_to_le64 ( address );
|
|
|
378
|
+ rx->length = RTL_RX_MAX_LEN;
|
|
|
379
|
+ wmb();
|
|
|
380
|
+ rx->flags = ( cpu_to_le16 ( RTL_DESC_OWN ) |
|
|
|
381
|
+ ( is_last ? cpu_to_le16 ( RTL_DESC_EOR ) : 0 ) );
|
|
|
382
|
+ wmb();
|
|
|
383
|
+
|
|
|
384
|
+ /* Record I/O buffer */
|
|
|
385
|
+ assert ( rtl->rx_iobuf[rx_idx] == NULL );
|
|
|
386
|
+ rtl->rx_iobuf[rx_idx] = iobuf;
|
|
|
387
|
+
|
|
|
388
|
+ DBGC2 ( rtl, "REALTEK %p RX %d is [%llx,%llx)\n", rtl, rx_idx,
|
|
|
389
|
+ ( ( unsigned long long ) address ),
|
|
|
390
|
+ ( ( unsigned long long ) address + RTL_RX_MAX_LEN ) );
|
|
|
391
|
+ }
|
|
|
392
|
+}
|
|
|
393
|
+
|
|
|
394
|
+/**
|
|
|
395
|
+ * Open network device
|
|
|
396
|
+ *
|
|
|
397
|
+ * @v netdev Network device
|
|
|
398
|
+ * @ret rc Return status code
|
|
|
399
|
+ */
|
|
|
400
|
+static int realtek_open ( struct net_device *netdev ) {
|
|
|
401
|
+ struct realtek_nic *rtl = netdev->priv;
|
|
|
402
|
+ uint32_t rcr;
|
|
|
403
|
+ int rc;
|
|
|
404
|
+
|
|
|
405
|
+ /* Create transmit descriptor ring */
|
|
|
406
|
+ if ( ( rc = realtek_create_ring ( rtl, &rtl->tx ) ) != 0 )
|
|
|
407
|
+ goto err_create_tx;
|
|
|
408
|
+
|
|
|
409
|
+ /* Create receive descriptor ring */
|
|
|
410
|
+ if ( ( rc = realtek_create_ring ( rtl, &rtl->rx ) ) != 0 )
|
|
|
411
|
+ goto err_create_rx;
|
|
|
412
|
+
|
|
|
413
|
+ /* Configure MTU */
|
|
|
414
|
+ writew ( RTL_RX_MAX_LEN, rtl->regs + RTL_RMS );
|
|
|
415
|
+
|
|
|
416
|
+ /* Accept all packets */
|
|
|
417
|
+ writel ( 0xffffffffUL, rtl->regs + RTL_MAR0 );
|
|
|
418
|
+ writel ( 0xffffffffUL, rtl->regs + RTL_MAR4 );
|
|
|
419
|
+ rcr = readl ( rtl->regs + RTL_RCR );
|
|
|
420
|
+ writel ( ( rcr | RTL_RCR_AB | RTL_RCR_AM | RTL_RCR_APM | RTL_RCR_AAP ),
|
|
|
421
|
+ rtl->regs + RTL_RCR );
|
|
|
422
|
+
|
|
|
423
|
+ /* Fill receive ring */
|
|
|
424
|
+ realtek_refill_rx ( rtl );
|
|
|
425
|
+
|
|
|
426
|
+ /* Enable transmitter and receiver */
|
|
|
427
|
+ writeb ( ( RTL_CR_TE | RTL_CR_RE ), rtl->regs + RTL_CR );
|
|
|
428
|
+
|
|
|
429
|
+ return 0;
|
|
|
430
|
+
|
|
|
431
|
+ realtek_destroy_ring ( rtl, &rtl->rx );
|
|
|
432
|
+ err_create_rx:
|
|
|
433
|
+ realtek_destroy_ring ( rtl, &rtl->tx );
|
|
|
434
|
+ err_create_tx:
|
|
|
435
|
+ return rc;
|
|
|
436
|
+}
|
|
|
437
|
+
|
|
|
438
|
+/**
|
|
|
439
|
+ * Close network device
|
|
|
440
|
+ *
|
|
|
441
|
+ * @v netdev Network device
|
|
|
442
|
+ */
|
|
|
443
|
+static void realtek_close ( struct net_device *netdev ) {
|
|
|
444
|
+ struct realtek_nic *rtl = netdev->priv;
|
|
|
445
|
+ unsigned int i;
|
|
|
446
|
+
|
|
|
447
|
+ /* Disable receiver and transmitter */
|
|
|
448
|
+ writeb ( 0, rtl->regs + RTL_CR );
|
|
|
449
|
+
|
|
|
450
|
+ /* Destroy receive descriptor ring */
|
|
|
451
|
+ realtek_destroy_ring ( rtl, &rtl->rx );
|
|
|
452
|
+
|
|
|
453
|
+ /* Discard any unused receive buffers */
|
|
|
454
|
+ for ( i = 0 ; i < RTL_NUM_RX_DESC ; i++ ) {
|
|
|
455
|
+ if ( rtl->rx_iobuf[i] )
|
|
|
456
|
+ free_iob ( rtl->rx_iobuf[i] );
|
|
|
457
|
+ rtl->rx_iobuf[i] = NULL;
|
|
|
458
|
+ }
|
|
|
459
|
+
|
|
|
460
|
+ /* Destroy transmit descriptor ring */
|
|
|
461
|
+ realtek_destroy_ring ( rtl, &rtl->tx );
|
|
|
462
|
+}
|
|
|
463
|
+
|
|
|
464
|
+/**
|
|
|
465
|
+ * Transmit packet
|
|
|
466
|
+ *
|
|
|
467
|
+ * @v netdev Network device
|
|
|
468
|
+ * @v iobuf I/O buffer
|
|
|
469
|
+ * @ret rc Return status code
|
|
|
470
|
+ */
|
|
|
471
|
+static int realtek_transmit ( struct net_device *netdev,
|
|
|
472
|
+ struct io_buffer *iobuf ) {
|
|
|
473
|
+ struct realtek_nic *rtl = netdev->priv;
|
|
|
474
|
+ struct realtek_descriptor *tx;
|
|
|
475
|
+ unsigned int tx_idx;
|
|
|
476
|
+ physaddr_t address;
|
|
|
477
|
+ int is_last;
|
|
|
478
|
+
|
|
|
479
|
+ /* Get next transmit descriptor */
|
|
|
480
|
+ if ( ( rtl->tx.prod - rtl->tx.cons ) >= RTL_NUM_TX_DESC ) {
|
|
|
481
|
+ DBGC ( rtl, "REALTEK %p out of transmit descriptors\n", rtl );
|
|
|
482
|
+ return -ENOBUFS;
|
|
|
483
|
+ }
|
|
|
484
|
+ tx_idx = ( rtl->tx.prod++ % RTL_NUM_TX_DESC );
|
|
|
485
|
+ is_last = ( tx_idx == ( RTL_NUM_TX_DESC - 1 ) );
|
|
|
486
|
+ tx = &rtl->tx.desc[tx_idx];
|
|
|
487
|
+
|
|
|
488
|
+ /* Populate transmit descriptor */
|
|
|
489
|
+ address = virt_to_bus ( iobuf->data );
|
|
|
490
|
+ tx->address = cpu_to_le64 ( address );
|
|
|
491
|
+ tx->length = cpu_to_le16 ( iob_len ( iobuf ) );
|
|
|
492
|
+ wmb();
|
|
|
493
|
+ tx->flags = ( cpu_to_le16 ( RTL_DESC_OWN | RTL_DESC_FS | RTL_DESC_LS ) |
|
|
|
494
|
+ ( is_last ? cpu_to_le16 ( RTL_DESC_EOR ) : 0 ) );
|
|
|
495
|
+ wmb();
|
|
|
496
|
+
|
|
|
497
|
+ /* Notify card that there are packets ready to transmit */
|
|
|
498
|
+ writeb ( RTL_TPPOLL_NPQ, rtl->regs + RTL_TPPOLL );
|
|
|
499
|
+
|
|
|
500
|
+ DBGC2 ( rtl, "REALTEK %p TX %d is [%llx,%llx)\n", rtl, tx_idx,
|
|
|
501
|
+ ( ( unsigned long long ) address ),
|
|
|
502
|
+ ( ( unsigned long long ) address + iob_len ( iobuf ) ) );
|
|
|
503
|
+
|
|
|
504
|
+ return 0;
|
|
|
505
|
+}
|
|
|
506
|
+
|
|
|
507
|
+/**
|
|
|
508
|
+ * Poll for completed packets
|
|
|
509
|
+ *
|
|
|
510
|
+ * @v netdev Network device
|
|
|
511
|
+ */
|
|
|
512
|
+static void realtek_poll_tx ( struct net_device *netdev ) {
|
|
|
513
|
+ struct realtek_nic *rtl = netdev->priv;
|
|
|
514
|
+ struct realtek_descriptor *tx;
|
|
|
515
|
+ unsigned int tx_idx;
|
|
|
516
|
+
|
|
|
517
|
+ /* Check for completed packets */
|
|
|
518
|
+ while ( rtl->tx.cons != rtl->tx.prod ) {
|
|
|
519
|
+
|
|
|
520
|
+ /* Get next transmit descriptor */
|
|
|
521
|
+ tx_idx = ( rtl->tx.cons % RTL_NUM_TX_DESC );
|
|
|
522
|
+ tx = &rtl->tx.desc[tx_idx];
|
|
|
523
|
+
|
|
|
524
|
+ /* Stop if descriptor is still in use */
|
|
|
525
|
+ if ( tx->flags & cpu_to_le16 ( RTL_DESC_OWN ) )
|
|
|
526
|
+ return;
|
|
|
527
|
+
|
|
|
528
|
+ DBGC2 ( rtl, "REALTEK %p TX %d complete\n", rtl, tx_idx );
|
|
|
529
|
+
|
|
|
530
|
+ /* Complete TX descriptor */
|
|
|
531
|
+ netdev_tx_complete_next ( netdev );
|
|
|
532
|
+ rtl->tx.cons++;
|
|
|
533
|
+ }
|
|
|
534
|
+}
|
|
|
535
|
+
|
|
|
536
|
+/**
|
|
|
537
|
+ * Poll for received packets
|
|
|
538
|
+ *
|
|
|
539
|
+ * @v netdev Network device
|
|
|
540
|
+ */
|
|
|
541
|
+static void realtek_poll_rx ( struct net_device *netdev ) {
|
|
|
542
|
+ struct realtek_nic *rtl = netdev->priv;
|
|
|
543
|
+ struct realtek_descriptor *rx;
|
|
|
544
|
+ struct io_buffer *iobuf;
|
|
|
545
|
+ unsigned int rx_idx;
|
|
|
546
|
+ size_t len;
|
|
|
547
|
+
|
|
|
548
|
+ /* Check for received packets */
|
|
|
549
|
+ while ( rtl->rx.cons != rtl->rx.prod ) {
|
|
|
550
|
+
|
|
|
551
|
+ /* Get next receive descriptor */
|
|
|
552
|
+ rx_idx = ( rtl->rx.cons % RTL_NUM_RX_DESC );
|
|
|
553
|
+ rx = &rtl->rx.desc[rx_idx];
|
|
|
554
|
+
|
|
|
555
|
+ /* Stop if descriptor is still in use */
|
|
|
556
|
+ if ( rx->flags & cpu_to_le16 ( RTL_DESC_OWN ) )
|
|
|
557
|
+ return;
|
|
|
558
|
+
|
|
|
559
|
+ /* Populate I/O buffer */
|
|
|
560
|
+ iobuf = rtl->rx_iobuf[rx_idx];
|
|
|
561
|
+ rtl->rx_iobuf[rx_idx] = NULL;
|
|
|
562
|
+ len = ( le16_to_cpu ( rx->length ) & RTL_DESC_SIZE_MASK );
|
|
|
563
|
+ iob_put ( iobuf, ( len - 4 /* strip CRC */ ) );
|
|
|
564
|
+
|
|
|
565
|
+ DBGC2 ( rtl, "REALTEK %p RX %d complete (length %zd)\n",
|
|
|
566
|
+ rtl, rx_idx, len );
|
|
|
567
|
+
|
|
|
568
|
+ /* Hand off to network stack */
|
|
|
569
|
+ if ( rx->flags & cpu_to_le16 ( RTL_DESC_RES ) ) {
|
|
|
570
|
+ netdev_rx_err ( netdev, iobuf, -EIO );
|
|
|
571
|
+ } else {
|
|
|
572
|
+ netdev_rx ( netdev, iobuf );
|
|
|
573
|
+ }
|
|
|
574
|
+ rtl->rx.cons++;
|
|
|
575
|
+ }
|
|
|
576
|
+}
|
|
|
577
|
+
|
|
|
578
|
+/**
|
|
|
579
|
+ * Poll for completed and received packets
|
|
|
580
|
+ *
|
|
|
581
|
+ * @v netdev Network device
|
|
|
582
|
+ */
|
|
|
583
|
+static void realtek_poll ( struct net_device *netdev ) {
|
|
|
584
|
+ struct realtek_nic *rtl = netdev->priv;
|
|
|
585
|
+ uint16_t isr;
|
|
|
586
|
+
|
|
|
587
|
+ /* Check for and acknowledge interrupts */
|
|
|
588
|
+ isr = readw ( rtl->regs + RTL_ISR );
|
|
|
589
|
+ if ( ! isr )
|
|
|
590
|
+ return;
|
|
|
591
|
+ writew ( isr, rtl->regs + RTL_ISR );
|
|
|
592
|
+
|
|
|
593
|
+ /* Poll for TX completions, if applicable */
|
|
|
594
|
+ if ( isr & ( RTL_IRQ_TER | RTL_IRQ_TOK ) )
|
|
|
595
|
+ realtek_poll_tx ( netdev );
|
|
|
596
|
+
|
|
|
597
|
+ /* Poll for RX completionsm, if applicable */
|
|
|
598
|
+ if ( isr & ( RTL_IRQ_RER | RTL_IRQ_ROK ) )
|
|
|
599
|
+ realtek_poll_rx ( netdev );
|
|
|
600
|
+
|
|
|
601
|
+ /* Check link state, if applicable */
|
|
|
602
|
+ if ( isr & RTL_IRQ_PUN_LINKCHG )
|
|
|
603
|
+ realtek_check_link ( netdev );
|
|
|
604
|
+
|
|
|
605
|
+ /* Refill RX ring */
|
|
|
606
|
+ realtek_refill_rx ( rtl );
|
|
|
607
|
+}
|
|
|
608
|
+
|
|
|
609
|
+/**
|
|
|
610
|
+ * Enable or disable interrupts
|
|
|
611
|
+ *
|
|
|
612
|
+ * @v netdev Network device
|
|
|
613
|
+ * @v enable Interrupts should be enabled
|
|
|
614
|
+ */
|
|
|
615
|
+static void realtek_irq ( struct net_device *netdev, int enable ) {
|
|
|
616
|
+ struct realtek_nic *rtl = netdev->priv;
|
|
|
617
|
+ uint16_t imr;
|
|
|
618
|
+
|
|
|
619
|
+ /* Set interrupt mask */
|
|
|
620
|
+ imr = ( enable ? ( RTL_IRQ_PUN_LINKCHG | RTL_IRQ_TER | RTL_IRQ_TOK |
|
|
|
621
|
+ RTL_IRQ_RER | RTL_IRQ_ROK ) : 0 );
|
|
|
622
|
+ writew ( imr, rtl->regs + RTL_IMR );
|
|
|
623
|
+}
|
|
|
624
|
+
|
|
|
625
|
+/** Realtek network device operations */
|
|
|
626
|
+static struct net_device_operations realtek_operations = {
|
|
|
627
|
+ .open = realtek_open,
|
|
|
628
|
+ .close = realtek_close,
|
|
|
629
|
+ .transmit = realtek_transmit,
|
|
|
630
|
+ .poll = realtek_poll,
|
|
|
631
|
+ .irq = realtek_irq,
|
|
|
632
|
+};
|
|
|
633
|
+
|
|
|
634
|
+/******************************************************************************
|
|
|
635
|
+ *
|
|
|
636
|
+ * PCI interface
|
|
|
637
|
+ *
|
|
|
638
|
+ ******************************************************************************
|
|
|
639
|
+ */
|
|
|
640
|
+
|
|
|
641
|
+/**
|
|
|
642
|
+ * Probe PCI device
|
|
|
643
|
+ *
|
|
|
644
|
+ * @v pci PCI device
|
|
|
645
|
+ * @ret rc Return status code
|
|
|
646
|
+ */
|
|
|
647
|
+static int realtek_probe ( struct pci_device *pci ) {
|
|
|
648
|
+ struct net_device *netdev;
|
|
|
649
|
+ struct realtek_nic *rtl;
|
|
|
650
|
+ unsigned int i;
|
|
|
651
|
+ int rc;
|
|
|
652
|
+
|
|
|
653
|
+ /* Allocate and initialise net device */
|
|
|
654
|
+ netdev = alloc_etherdev ( sizeof ( *rtl ) );
|
|
|
655
|
+ if ( ! netdev ) {
|
|
|
656
|
+ rc = -ENOMEM;
|
|
|
657
|
+ goto err_alloc;
|
|
|
658
|
+ }
|
|
|
659
|
+ netdev_init ( netdev, &realtek_operations );
|
|
|
660
|
+ rtl = netdev->priv;
|
|
|
661
|
+ pci_set_drvdata ( pci, netdev );
|
|
|
662
|
+ netdev->dev = &pci->dev;
|
|
|
663
|
+ memset ( rtl, 0, sizeof ( *rtl ) );
|
|
|
664
|
+ realtek_init_ring ( &rtl->tx, RTL_NUM_TX_DESC, RTL_TNPDS );
|
|
|
665
|
+ realtek_init_ring ( &rtl->rx, RTL_NUM_RX_DESC, RTL_RDSAR );
|
|
|
666
|
+
|
|
|
667
|
+ /* Fix up PCI device */
|
|
|
668
|
+ adjust_pci_device ( pci );
|
|
|
669
|
+
|
|
|
670
|
+ /* Map registers */
|
|
|
671
|
+ rtl->regs = ioremap ( pci->membase, RTL_BAR_SIZE );
|
|
|
672
|
+
|
|
|
673
|
+ /* Reset the NIC */
|
|
|
674
|
+ if ( ( rc = realtek_reset ( rtl ) ) != 0 )
|
|
|
675
|
+ goto err_reset;
|
|
|
676
|
+
|
|
|
677
|
+ /* Initialise EEPROM */
|
|
|
678
|
+ realtek_init_eeprom ( netdev );
|
|
|
679
|
+
|
|
|
680
|
+ /* Read MAC address from EEPROM */
|
|
|
681
|
+ if ( ( rc = nvs_read ( &rtl->eeprom.nvs, RTL_EEPROM_MAC,
|
|
|
682
|
+ netdev->hw_addr, ETH_ALEN ) ) != 0 ) {
|
|
|
683
|
+ DBGC ( rtl, "REALTEK %p could not read MAC address: %s\n",
|
|
|
684
|
+ rtl, strerror ( rc ) );
|
|
|
685
|
+ goto err_nvs_read;
|
|
|
686
|
+ }
|
|
|
687
|
+
|
|
|
688
|
+ /* The EEPROM may not be present for onboard NICs. Fall back
|
|
|
689
|
+ * to reading the current ID register value, which will
|
|
|
690
|
+ * hopefully have been programmed by the platform firmware.
|
|
|
691
|
+ */
|
|
|
692
|
+ if ( ! is_valid_ether_addr ( netdev->hw_addr ) ) {
|
|
|
693
|
+ DBGC ( rtl, "REALTEK %p seems to have no EEPROM\n", rtl );
|
|
|
694
|
+ for ( i = 0 ; i < ETH_ALEN ; i++ )
|
|
|
695
|
+ netdev->hw_addr[i] = readb ( rtl->regs + RTL_IDR0 + i );
|
|
|
696
|
+ }
|
|
|
697
|
+
|
|
|
698
|
+ /* Initialise and reset MII interface */
|
|
|
699
|
+ mii_init ( &rtl->mii, &realtek_mii_operations );
|
|
|
700
|
+ if ( ( rc = mii_reset ( &rtl->mii ) ) != 0 ) {
|
|
|
701
|
+ DBGC ( rtl, "REALTEK %p could not reset MII: %s\n",
|
|
|
702
|
+ rtl, strerror ( rc ) );
|
|
|
703
|
+ goto err_mii_reset;
|
|
|
704
|
+ }
|
|
|
705
|
+
|
|
|
706
|
+ /* Register network device */
|
|
|
707
|
+ if ( ( rc = register_netdev ( netdev ) ) != 0 )
|
|
|
708
|
+ goto err_register_netdev;
|
|
|
709
|
+
|
|
|
710
|
+ /* Set initial link state */
|
|
|
711
|
+ realtek_check_link ( netdev );
|
|
|
712
|
+
|
|
|
713
|
+ /* Register non-volatile options, if applicable */
|
|
|
714
|
+ if ( rtl->nvo.nvs ) {
|
|
|
715
|
+ if ( ( rc = register_nvo ( &rtl->nvo,
|
|
|
716
|
+ netdev_settings ( netdev ) ) ) != 0)
|
|
|
717
|
+ goto err_register_nvo;
|
|
|
718
|
+ }
|
|
|
719
|
+
|
|
|
720
|
+ return 0;
|
|
|
721
|
+
|
|
|
722
|
+ err_register_nvo:
|
|
|
723
|
+ unregister_netdev ( netdev );
|
|
|
724
|
+ err_register_netdev:
|
|
|
725
|
+ err_mii_reset:
|
|
|
726
|
+ err_nvs_read:
|
|
|
727
|
+ realtek_reset ( rtl );
|
|
|
728
|
+ err_reset:
|
|
|
729
|
+ netdev_nullify ( netdev );
|
|
|
730
|
+ netdev_put ( netdev );
|
|
|
731
|
+ err_alloc:
|
|
|
732
|
+ return rc;
|
|
|
733
|
+}
|
|
|
734
|
+
|
|
|
735
|
+/**
|
|
|
736
|
+ * Remove PCI device
|
|
|
737
|
+ *
|
|
|
738
|
+ * @v pci PCI device
|
|
|
739
|
+ */
|
|
|
740
|
+static void realtek_remove ( struct pci_device *pci ) {
|
|
|
741
|
+ struct net_device *netdev = pci_get_drvdata ( pci );
|
|
|
742
|
+ struct realtek_nic *rtl = netdev->priv;
|
|
|
743
|
+
|
|
|
744
|
+ /* Unregister non-volatile options, if applicable */
|
|
|
745
|
+ if ( rtl->nvo.nvs )
|
|
|
746
|
+ unregister_nvo ( &rtl->nvo );
|
|
|
747
|
+
|
|
|
748
|
+ /* Unregister network device */
|
|
|
749
|
+ unregister_netdev ( netdev );
|
|
|
750
|
+
|
|
|
751
|
+ /* Reset card */
|
|
|
752
|
+ realtek_reset ( rtl );
|
|
|
753
|
+
|
|
|
754
|
+ /* Free network device */
|
|
|
755
|
+ netdev_nullify ( netdev );
|
|
|
756
|
+ netdev_put ( netdev );
|
|
|
757
|
+}
|
|
|
758
|
+
|
|
|
759
|
+/** Realtek PCI device IDs */
|
|
|
760
|
+static struct pci_device_id realtek_nics[] = {
|
|
|
761
|
+ PCI_ROM ( 0x10ec, 0x8129, "r8129", "RTL-8129", 0 ),
|
|
|
762
|
+ PCI_ROM ( 0x10ec, 0x8136, "r8136", "RTL8101E/RTL8102E", 0 ),
|
|
|
763
|
+ PCI_ROM ( 0x10ec, 0x8167, "r8167", "RTL-8110SC/8169SC", 0 ),
|
|
|
764
|
+ PCI_ROM ( 0x10ec, 0x8168, "r8168", "RTL8111/8168B", 0 ),
|
|
|
765
|
+ PCI_ROM ( 0x10ec, 0x8169, "r8169", "RTL-8169", 0 ),
|
|
|
766
|
+ PCI_ROM ( 0x1186, 0x4300, "dge528t", "DGE-528T", 0 ),
|
|
|
767
|
+ PCI_ROM ( 0x1259, 0xc107, "allied8169", "Allied Telesyn 8169", 0 ),
|
|
|
768
|
+ PCI_ROM ( 0x16ec, 0x0116, "usr997902", "USR997902", 0 ),
|
|
|
769
|
+ PCI_ROM ( 0x1737, 0x1032, "linksys8169","Linksys 8169", 0 ),
|
|
|
770
|
+ PCI_ROM ( 0x0001, 0x8168, "clone8169", "Cloned 8169", 0 ),
|
|
|
771
|
+};
|
|
|
772
|
+
|
|
|
773
|
+/** Realtek PCI driver */
|
|
|
774
|
+struct pci_driver realtek_driver __pci_driver = {
|
|
|
775
|
+ .ids = realtek_nics,
|
|
|
776
|
+ .id_count = ( sizeof ( realtek_nics ) / sizeof ( realtek_nics[0] ) ),
|
|
|
777
|
+ .probe = realtek_probe,
|
|
|
778
|
+ .remove = realtek_remove,
|
|
|
779
|
+};
|
Michael Brown
12 years ago