--- /dev/null
+/*
+ * Copyright (C) 2017 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <ipxe/ethernet.h>
+#include <ipxe/usb.h>
+#include <ipxe/usbnet.h>
+#include "lan78xx.h"
+
+/** @file
+ *
+ * Microchip LAN78xx USB Ethernet driver
+ *
+ */
+
+/******************************************************************************
+ *
+ * MAC address
+ *
+ ******************************************************************************
+ */
+
+/**
+ * Fetch MAC address from EEPROM
+ *
+ * @v smscusb SMSC USB device
+ * @ret rc Return status code
+ */
+static int lan78xx_eeprom_fetch_mac ( struct smscusb_device *smscusb ) {
+ uint32_t hw_cfg;
+ uint32_t orig_hw_cfg;
+ int rc;
+
+ /* Read original HW_CFG value */
+ if ( ( rc = smscusb_readl ( smscusb, LAN78XX_HW_CFG, &hw_cfg ) ) != 0 )
+ goto err_read_hw_cfg;
+ orig_hw_cfg = hw_cfg;
+
+ /* Temporarily disable LED0 and LED1 (which share physical
+ * pins with EEDO and EECLK respectively).
+ */
+ hw_cfg &= ~( LAN78XX_HW_CFG_LED0_EN | LAN78XX_HW_CFG_LED1_EN );
+ if ( ( rc = smscusb_writel ( smscusb, LAN78XX_HW_CFG, hw_cfg ) ) != 0 )
+ goto err_write_hw_cfg;
+
+ /* Fetch MAC address from EEPROM */
+ if ( ( rc = smscusb_eeprom_fetch_mac ( smscusb,
+ LAN78XX_E2P_BASE ) ) != 0 )
+ goto err_fetch_mac;
+
+ err_fetch_mac:
+ smscusb_writel ( smscusb, LAN78XX_HW_CFG, orig_hw_cfg );
+ err_write_hw_cfg:
+ err_read_hw_cfg:
+ return rc;
+}
+
+/**
+ * Fetch MAC address
+ *
+ * @v smscusb SMSC USB device
+ * @ret rc Return status code
+ */
+static int lan78xx_fetch_mac ( struct smscusb_device *smscusb ) {
+ struct net_device *netdev = smscusb->netdev;
+ int rc;
+
+ /* Read MAC address from EEPROM, if present */
+ if ( ( rc = lan78xx_eeprom_fetch_mac ( smscusb ) ) == 0 )
+ return 0;
+
+ /* Read MAC address from OTP, if present */
+ if ( ( rc = smscusb_otp_fetch_mac ( smscusb, LAN78XX_OTP_BASE ) ) == 0 )
+ return 0;
+
+ /* Otherwise, generate a random MAC address */
+ eth_random_addr ( netdev->hw_addr );
+ DBGC ( smscusb, "LAN78XX %p using random MAC %s\n",
+ smscusb, eth_ntoa ( netdev->hw_addr ) );
+ return 0;
+}
+
+/******************************************************************************
+ *
+ * Device reset
+ *
+ ******************************************************************************
+ */
+
+/**
+ * Reset device
+ *
+ * @v smscusb SMSC USB device
+ * @ret rc Return status code
+ */
+static int lan78xx_reset ( struct smscusb_device *smscusb ) {
+ uint32_t hw_cfg;
+ unsigned int i;
+ int rc;
+
+ /* Reset device */
+ if ( ( rc = smscusb_writel ( smscusb, LAN78XX_HW_CFG,
+ LAN78XX_HW_CFG_LRST ) ) != 0 )
+ return rc;
+
+ /* Wait for reset to complete */
+ for ( i = 0 ; i < LAN78XX_RESET_MAX_WAIT_MS ; i++ ) {
+
+ /* Check if reset has completed */
+ if ( ( rc = smscusb_readl ( smscusb, LAN78XX_HW_CFG,
+ &hw_cfg ) ) != 0 )
+ return rc;
+ if ( ! ( hw_cfg & LAN78XX_HW_CFG_LRST ) )
+ return 0;
+
+ /* Delay */
+ mdelay ( 1 );
+ }
+
+ DBGC ( smscusb, "LAN78XX %p timed out waiting for reset\n",
+ smscusb );
+ return -ETIMEDOUT;
+}
+
+/******************************************************************************
+ *
+ * Network device interface
+ *
+ ******************************************************************************
+ */
+
+/**
+ * Open network device
+ *
+ * @v netdev Network device
+ * @ret rc Return status code
+ */
+static int lan78xx_open ( struct net_device *netdev ) {
+ struct smscusb_device *smscusb = netdev->priv;
+ uint32_t usb_cfg0;
+ int rc;
+
+ /* Clear stored interrupt status */
+ smscusb->int_sts = 0;
+
+ /* Configure bulk IN empty response */
+ if ( ( rc = smscusb_readl ( smscusb, LAN78XX_USB_CFG0,
+ &usb_cfg0 ) ) != 0 )
+ goto err_usb_cfg0_read;
+ usb_cfg0 |= LAN78XX_USB_CFG0_BIR;
+ if ( ( rc = smscusb_writel ( smscusb, LAN78XX_USB_CFG0,
+ usb_cfg0 ) ) != 0 )
+ goto err_usb_cfg0_write;
+
+ /* Open USB network device */
+ if ( ( rc = usbnet_open ( &smscusb->usbnet ) ) != 0 ) {
+ DBGC ( smscusb, "LAN78XX %p could not open: %s\n",
+ smscusb, strerror ( rc ) );
+ goto err_open;
+ }
+
+ /* Configure interrupt endpoint */
+ if ( ( rc = smscusb_writel ( smscusb, LAN78XX_INT_EP_CTL,
+ ( LAN78XX_INT_EP_CTL_RDFO_EN |
+ LAN78XX_INT_EP_CTL_PHY_EN ) ) ) != 0 )
+ goto err_int_ep_ctl;
+
+ /* Configure bulk IN delay */
+ if ( ( rc = smscusb_writel ( smscusb, LAN78XX_BULK_IN_DLY,
+ LAN78XX_BULK_IN_DLY_SET ( 0 ) ) ) != 0 )
+ goto err_bulk_in_dly;
+
+ /* Configure receive filters */
+ if ( ( rc = smscusb_writel ( smscusb, LAN78XX_RFE_CTL,
+ ( LAN78XX_RFE_CTL_AB |
+ LAN78XX_RFE_CTL_AM |
+ LAN78XX_RFE_CTL_AU ) ) ) != 0 )
+ goto err_rfe_ctl;
+
+ /* Configure receive FIFO */
+ if ( ( rc = smscusb_writel ( smscusb, LAN78XX_FCT_RX_CTL,
+ ( LAN78XX_FCT_RX_CTL_EN |
+ LAN78XX_FCT_RX_CTL_BAD ) ) ) != 0 )
+ goto err_fct_rx_ctl;
+
+ /* Configure transmit FIFO */
+ if ( ( rc = smscusb_writel ( smscusb, LAN78XX_FCT_TX_CTL,
+ LAN78XX_FCT_TX_CTL_EN ) ) != 0 )
+ goto err_fct_tx_ctl;
+
+ /* Configure receive datapath */
+ if ( ( rc = smscusb_writel ( smscusb, LAN78XX_MAC_RX,
+ ( LAN78XX_MAC_RX_MAX_SIZE_DEFAULT |
+ LAN78XX_MAC_RX_FCS |
+ LAN78XX_MAC_RX_EN ) ) ) != 0 )
+ goto err_mac_rx;
+
+ /* Configure transmit datapath */
+ if ( ( rc = smscusb_writel ( smscusb, LAN78XX_MAC_TX,
+ LAN78XX_MAC_TX_EN ) ) != 0 )
+ goto err_mac_tx;
+
+ /* Set MAC address */
+ if ( ( rc = smscusb_set_address ( smscusb,
+ LAN78XX_RX_ADDR_BASE ) ) != 0 )
+ goto err_set_address;
+
+ /* Set MAC address perfect filter */
+ if ( ( rc = smscusb_set_filter ( smscusb,
+ LAN78XX_ADDR_FILT_BASE ) ) != 0 )
+ goto err_set_filter;
+
+ /* Enable PHY interrupts and update link status */
+ if ( ( rc = smscusb_mii_open ( smscusb, LAN78XX_MII_PHY_INTR_MASK,
+ ( LAN78XX_PHY_INTR_ENABLE |
+ LAN78XX_PHY_INTR_LINK |
+ LAN78XX_PHY_INTR_ANEG_ERR |
+ LAN78XX_PHY_INTR_ANEG_DONE ) ) ) != 0 )
+ goto err_mii_open;
+
+ return 0;
+
+ err_mii_open:
+ err_set_filter:
+ err_set_address:
+ err_mac_tx:
+ err_mac_rx:
+ err_fct_tx_ctl:
+ err_fct_rx_ctl:
+ err_rfe_ctl:
+ err_bulk_in_dly:
+ err_int_ep_ctl:
+ usbnet_close ( &smscusb->usbnet );
+ err_open:
+ err_usb_cfg0_write:
+ err_usb_cfg0_read:
+ lan78xx_reset ( smscusb );
+ return rc;
+}
+
+/**
+ * Close network device
+ *
+ * @v netdev Network device
+ */
+static void lan78xx_close ( struct net_device *netdev ) {
+ struct smscusb_device *smscusb = netdev->priv;
+
+ /* Close USB network device */
+ usbnet_close ( &smscusb->usbnet );
+
+ /* Dump statistics (for debugging) */
+ if ( DBG_LOG )
+ smsc75xx_dump_statistics ( smscusb );
+
+ /* Reset device */
+ lan78xx_reset ( smscusb );
+}
+
+/** LAN78xx network device operations */
+static struct net_device_operations lan78xx_operations = {
+ .open = lan78xx_open,
+ .close = lan78xx_close,
+ .transmit = smsc75xx_transmit,
+ .poll = smsc75xx_poll,
+};
+
+/******************************************************************************
+ *
+ * USB interface
+ *
+ ******************************************************************************
+ */
+
+/**
+ * Probe device
+ *
+ * @v func USB function
+ * @v config Configuration descriptor
+ * @ret rc Return status code
+ */
+static int lan78xx_probe ( struct usb_function *func,
+ struct usb_configuration_descriptor *config ) {
+ struct net_device *netdev;
+ struct smscusb_device *smscusb;
+ int rc;
+
+ /* Allocate and initialise structure */
+ netdev = alloc_etherdev ( sizeof ( *smscusb ) );
+ if ( ! netdev ) {
+ rc = -ENOMEM;
+ goto err_alloc;
+ }
+ netdev_init ( netdev, &lan78xx_operations );
+ netdev->dev = &func->dev;
+ smscusb = netdev->priv;
+ memset ( smscusb, 0, sizeof ( *smscusb ) );
+ smscusb_init ( smscusb, netdev, func, &smsc75xx_in_operations );
+ smscusb_mii_init ( smscusb, LAN78XX_MII_BASE,
+ LAN78XX_MII_PHY_INTR_SOURCE );
+ usb_refill_init ( &smscusb->usbnet.in, 0, SMSC75XX_IN_MTU,
+ SMSC75XX_IN_MAX_FILL );
+ DBGC ( smscusb, "LAN78XX %p on %s\n", smscusb, func->name );
+
+ /* Describe USB network device */
+ if ( ( rc = usbnet_describe ( &smscusb->usbnet, config ) ) != 0 ) {
+ DBGC ( smscusb, "LAN78XX %p could not describe: %s\n",
+ smscusb, strerror ( rc ) );
+ goto err_describe;
+ }
+
+ /* Reset device */
+ if ( ( rc = lan78xx_reset ( smscusb ) ) != 0 )
+ goto err_reset;
+
+ /* Read MAC address */
+ if ( ( rc = lan78xx_fetch_mac ( smscusb ) ) != 0 )
+ goto err_fetch_mac;
+
+ /* Register network device */
+ if ( ( rc = register_netdev ( netdev ) ) != 0 )
+ goto err_register;
+
+ usb_func_set_drvdata ( func, netdev );
+ return 0;
+
+ unregister_netdev ( netdev );
+ err_register:
+ err_fetch_mac:
+ err_reset:
+ err_describe:
+ netdev_nullify ( netdev );
+ netdev_put ( netdev );
+ err_alloc:
+ return rc;
+}
+
+/**
+ * Remove device
+ *
+ * @v func USB function
+ */
+static void lan78xx_remove ( struct usb_function *func ) {
+ struct net_device *netdev = usb_func_get_drvdata ( func );
+
+ unregister_netdev ( netdev );
+ netdev_nullify ( netdev );
+ netdev_put ( netdev );
+}
+
+/** LAN78xx device IDs */
+static struct usb_device_id lan78xx_ids[] = {
+ {
+ .name = "lan7800",
+ .vendor = 0x0424,
+ .product = 0x7800,
+ },
+ {
+ .name = "lan7850",
+ .vendor = 0x0424,
+ .product = 0x7850,
+ },
+};
+
+/** LAN78xx driver */
+struct usb_driver lan78xx_driver __usb_driver = {
+ .ids = lan78xx_ids,
+ .id_count = ( sizeof ( lan78xx_ids ) / sizeof ( lan78xx_ids[0] ) ),
+ .class = USB_CLASS_ID ( 0xff, 0x00, 0xff ),
+ .score = USB_SCORE_NORMAL,
+ .probe = lan78xx_probe,
+ .remove = lan78xx_remove,
+};
--- /dev/null
+#ifndef _LAN78XX_H
+#define _LAN78XX_H
+
+/** @file
+ *
+ * Microchip LAN78xx USB Ethernet driver
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include "smscusb.h"
+#include "smsc75xx.h"
+
+/** Hardware configuration register */
+#define LAN78XX_HW_CFG 0x0010
+#define LAN78XX_HW_CFG_LED1_EN 0x00200000UL /**< LED1 enable */
+#define LAN78XX_HW_CFG_LED0_EN 0x00100000UL /**< LED1 enable */
+#define LAN78XX_HW_CFG_LRST 0x00000002UL /**< Soft lite reset */
+
+/** Interrupt endpoint control register */
+#define LAN78XX_INT_EP_CTL 0x0098
+#define LAN78XX_INT_EP_CTL_RDFO_EN 0x00400000UL /**< RX FIFO overflow */
+#define LAN78XX_INT_EP_CTL_PHY_EN 0x00020000UL /**< PHY interrupt */
+
+/** Bulk IN delay register */
+#define LAN78XX_BULK_IN_DLY 0x0094
+#define LAN78XX_BULK_IN_DLY_SET(ticks) ( (ticks) << 0 ) /**< Delay / 16.7ns */
+
+/** EEPROM register base */
+#define LAN78XX_E2P_BASE 0x0040
+
+/** USB configuration register 0 */
+#define LAN78XX_USB_CFG0 0x0080
+#define LAN78XX_USB_CFG0_BIR 0x00000040UL /**< Bulk IN use NAK */
+
+/** Receive filtering engine control register */
+#define LAN78XX_RFE_CTL 0x00b0
+#define LAN78XX_RFE_CTL_AB 0x00000400UL /**< Accept broadcast */
+#define LAN78XX_RFE_CTL_AM 0x00000200UL /**< Accept multicast */
+#define LAN78XX_RFE_CTL_AU 0x00000100UL /**< Accept unicast */
+
+/** FIFO controller RX FIFO control register */
+#define LAN78XX_FCT_RX_CTL 0x00c0
+#define LAN78XX_FCT_RX_CTL_EN 0x80000000UL /**< FCT RX enable */
+#define LAN78XX_FCT_RX_CTL_BAD 0x02000000UL /**< Store bad frames */
+
+/** FIFO controller TX FIFO control register */
+#define LAN78XX_FCT_TX_CTL 0x00c4
+#define LAN78XX_FCT_TX_CTL_EN 0x80000000UL /**< FCT TX enable */
+
+/** MAC receive register */
+#define LAN78XX_MAC_RX 0x0104
+#define LAN78XX_MAC_RX_MAX_SIZE(mtu) ( (mtu) << 16 ) /**< Max frame size */
+#define LAN78XX_MAC_RX_MAX_SIZE_DEFAULT \
+ LAN78XX_MAC_RX_MAX_SIZE ( ETH_FRAME_LEN + 4 /* VLAN */ + 4 /* CRC */ )
+#define LAN78XX_MAC_RX_FCS 0x00000010UL /**< FCS stripping */
+#define LAN78XX_MAC_RX_EN 0x00000001UL /**< RX enable */
+
+/** MAC transmit register */
+#define LAN78XX_MAC_TX 0x0108
+#define LAN78XX_MAC_TX_EN 0x00000001UL /**< TX enable */
+
+/** MAC receive address register base */
+#define LAN78XX_RX_ADDR_BASE 0x0118
+
+/** MII register base */
+#define LAN78XX_MII_BASE 0x0120
+
+/** PHY interrupt mask MII register */
+#define LAN78XX_MII_PHY_INTR_MASK 25
+
+/** PHY interrupt source MII register */
+#define LAN78XX_MII_PHY_INTR_SOURCE 26
+
+/** PHY interrupt: global enable */
+#define LAN78XX_PHY_INTR_ENABLE 0x8000
+
+/** PHY interrupt: link state change */
+#define LAN78XX_PHY_INTR_LINK 0x2000
+
+/** PHY interrupt: auto-negotiation failure */
+#define LAN78XX_PHY_INTR_ANEG_ERR 0x0800
+
+/** PHY interrupt: auto-negotiation complete */
+#define LAN78XX_PHY_INTR_ANEG_DONE 0x0400
+
+/** MAC address perfect filter register base */
+#define LAN78XX_ADDR_FILT_BASE 0x0400
+
+/** OTP register base */
+#define LAN78XX_OTP_BASE 0x1000
+
+/** Maximum time to wait for reset (in milliseconds) */
+#define LAN78XX_RESET_MAX_WAIT_MS 100
+
+#endif /* _LAN78XX_H */
projects / thirdparty / ipxe.git / commitdiff
