diff options
Diffstat (limited to 'drivers/net/cris/eth_v10.c')
| -rw-r--r-- | drivers/net/cris/eth_v10.c | 1836 |
1 files changed, 1836 insertions, 0 deletions
diff --git a/drivers/net/cris/eth_v10.c b/drivers/net/cris/eth_v10.c new file mode 100644 index 000000000000..442670860fca --- /dev/null +++ b/drivers/net/cris/eth_v10.c @@ -0,0 +1,1836 @@ +/* $Id: ethernet.c,v 1.31 2004/10/18 14:49:03 starvik Exp $ + * + * e100net.c: A network driver for the ETRAX 100LX network controller. + * + * Copyright (c) 1998-2002 Axis Communications AB. + * + * The outline of this driver comes from skeleton.c. + * + * $Log: ethernet.c,v $ + * Revision 1.31 2004/10/18 14:49:03 starvik + * Use RX interrupt as random source + * + * Revision 1.30 2004/09/29 10:44:04 starvik + * Enabed MAC-address output again + * + * Revision 1.29 2004/08/24 07:14:05 starvik + * Make use of generic MDIO interface and constants. + * + * Revision 1.28 2004/08/20 09:37:11 starvik + * Added support for Intel LXT972A. Creds to Randy Scarborough. + * + * Revision 1.27 2004/08/16 12:37:22 starvik + * Merge of Linux 2.6.8 + * + * Revision 1.25 2004/06/21 10:29:57 starvik + * Merge of Linux 2.6.7 + * + * Revision 1.23 2004/06/09 05:29:22 starvik + * Avoid any race where R_DMA_CH1_FIRST is NULL (may trigger cache bug). + * + * Revision 1.22 2004/05/14 07:58:03 starvik + * Merge of changes from 2.4 + * + * Revision 1.20 2004/03/11 11:38:40 starvik + * Merge of Linux 2.6.4 + * + * Revision 1.18 2003/12/03 13:45:46 starvik + * Use hardware pad for short packets to prevent information leakage. + * + * Revision 1.17 2003/07/04 08:27:37 starvik + * Merge of Linux 2.5.74 + * + * Revision 1.16 2003/04/24 08:28:22 starvik + * New LED behaviour: LED off when no link + * + * Revision 1.15 2003/04/09 05:20:47 starvik + * Merge of Linux 2.5.67 + * + * Revision 1.13 2003/03/06 16:11:01 henriken + * Off by one error in group address register setting. + * + * Revision 1.12 2003/02/27 17:24:19 starvik + * Corrected Rev to Revision + * + * Revision 1.11 2003/01/24 09:53:21 starvik + * Oops. Initialize GA to 0, not to 1 + * + * Revision 1.10 2003/01/24 09:50:55 starvik + * Initialize GA_0 and GA_1 to 0 to avoid matching of unwanted packets + * + * Revision 1.9 2002/12/13 07:40:58 starvik + * Added basic ethtool interface + * Handled out of memory when allocating new buffers + * + * Revision 1.8 2002/12/11 13:13:57 starvik + * Added arch/ to v10 specific includes + * Added fix from Linux 2.4 in serial.c (flush_to_flip_buffer) + * + * Revision 1.7 2002/11/26 09:41:42 starvik + * Added e100_set_config (standard interface to set media type) + * Added protection against preemptive scheduling + * Added standard MII ioctls + * + * Revision 1.6 2002/11/21 07:18:18 starvik + * Timers must be initialized in 2.5.48 + * + * Revision 1.5 2002/11/20 11:56:11 starvik + * Merge of Linux 2.5.48 + * + * Revision 1.4 2002/11/18 07:26:46 starvik + * Linux 2.5 port of latest Linux 2.4 ethernet driver + * + * Revision 1.33 2002/10/02 20:16:17 hp + * SETF, SETS: Use underscored IO_x_ macros rather than incorrect token concatenation + * + * Revision 1.32 2002/09/16 06:05:58 starvik + * Align memory returned by dev_alloc_skb + * Moved handling of sent packets to interrupt to avoid reference counting problem + * + * Revision 1.31 2002/09/10 13:28:23 larsv + * Return -EINVAL for unknown ioctls to avoid confusing tools that tests + * for supported functionality by issuing special ioctls, i.e. wireless + * extensions. + * + * Revision 1.30 2002/05/07 18:50:08 johana + * Correct spelling in comments. + * + * Revision 1.29 2002/05/06 05:38:49 starvik + * Performance improvements: + * Large packets are not copied (breakpoint set to 256 bytes) + * The cache bug workaround is delayed until half of the receive list + * has been used + * Added transmit list + * Transmit interrupts are only enabled when transmit queue is full + * + * Revision 1.28.2.1 2002/04/30 08:15:51 starvik + * Performance improvements: + * Large packets are not copied (breakpoint set to 256 bytes) + * The cache bug workaround is delayed until half of the receive list + * has been used. + * Added transmit list + * Transmit interrupts are only enabled when transmit queue is full + * + * Revision 1.28 2002/04/22 11:47:21 johana + * Fix according to 2.4.19-pre7. time_after/time_before and + * missing end of comment. + * The patch has a typo for ethernet.c in e100_clear_network_leds(), + * that is fixed here. + * + * Revision 1.27 2002/04/12 11:55:11 bjornw + * Added TODO + * + * Revision 1.26 2002/03/15 17:11:02 bjornw + * Use prepare_rx_descriptor after the CPU has touched the receiving descs + * + * Revision 1.25 2002/03/08 13:07:53 bjornw + * Unnecessary spinlock removed + * + * Revision 1.24 2002/02/20 12:57:43 fredriks + * Replaced MIN() with min(). + * + * Revision 1.23 2002/02/20 10:58:14 fredriks + * Strip the Ethernet checksum (4 bytes) before forwarding a frame to upper layers. + * + * Revision 1.22 2002/01/30 07:48:22 matsfg + * Initiate R_NETWORK_TR_CTRL + * + * Revision 1.21 2001/11/23 11:54:49 starvik + * Added IFF_PROMISC and IFF_ALLMULTI handling in set_multicast_list + * Removed compiler warnings + * + * Revision 1.20 2001/11/12 19:26:00 pkj + * * Corrected e100_negotiate() to not assign half to current_duplex when + * it was supposed to compare them... + * * Cleaned up failure handling in e100_open(). + * * Fixed compiler warnings. + * + * Revision 1.19 2001/11/09 07:43:09 starvik + * Added full duplex support + * Added ioctl to set speed and duplex + * Clear LED timer only runs when LED is lit + * + * Revision 1.18 2001/10/03 14:40:43 jonashg + * Update rx_bytes counter. + * + * Revision 1.17 2001/06/11 12:43:46 olof + * Modified defines for network LED behavior + * + * Revision 1.16 2001/05/30 06:12:46 markusl + * TxDesc.next should not be set to NULL + * + * Revision 1.15 2001/05/29 10:27:04 markusl + * Updated after review remarks: + * +Use IO_EXTRACT + * +Handle underrun + * + * Revision 1.14 2001/05/29 09:20:14 jonashg + * Use driver name on printk output so one can tell which driver that complains. + * + * Revision 1.13 2001/05/09 12:35:59 johana + * Use DMA_NBR and IRQ_NBR defines from dma.h and irq.h + * + * Revision 1.12 2001/04/05 11:43:11 tobiasa + * Check dev before panic. + * + * Revision 1.11 2001/04/04 11:21:05 markusl + * Updated according to review remarks + * + * Revision 1.10 2001/03/26 16:03:06 bjornw + * Needs linux/config.h + * + * Revision 1.9 2001/03/19 14:47:48 pkj + * * Make sure there is always a pause after the network LEDs are + * changed so they will not look constantly lit during heavy traffic. + * * Always use HZ when setting times relative to jiffies. + * * Use LED_NETWORK_SET() when setting the network LEDs. + * + * Revision 1.8 2001/02/27 13:52:48 bjornw + * malloc.h -> slab.h + * + * Revision 1.7 2001/02/23 13:46:38 bjornw + * Spellling check + * + * Revision 1.6 2001/01/26 15:21:04 starvik + * Don't disable interrupts while reading MDIO registers (MDIO is slow) + * Corrected promiscuous mode + * Improved deallocation of IRQs ("ifconfig eth0 down" now works) + * + * Revision 1.5 2000/11/29 17:22:22 bjornw + * Get rid of the udword types legacy stuff + * + * Revision 1.4 2000/11/22 16:36:09 bjornw + * Please marketing by using the correct case when spelling Etrax. + * + * Revision 1.3 2000/11/21 16:43:04 bjornw + * Minor short->int change + * + * Revision 1.2 2000/11/08 14:27:57 bjornw + * 2.4 port + * + * Revision 1.1 2000/11/06 13:56:00 bjornw + * Verbatim copy of the 1.24 version of e100net.c from elinux + * + * Revision 1.24 2000/10/04 15:55:23 bjornw + * * Use virt_to_phys etc. for DMA addresses + * * Removed bogus CHECKSUM_UNNECESSARY + * + * + */ + +#include <linux/config.h> + +#include <linux/module.h> + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/delay.h> +#include <linux/types.h> +#include <linux/fcntl.h> +#include <linux/interrupt.h> +#include <linux/ptrace.h> +#include <linux/ioport.h> +#include <linux/in.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/spinlock.h> +#include <linux/errno.h> +#include <linux/init.h> + +#include <linux/if.h> +#include <linux/mii.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/ethtool.h> + +#include <asm/arch/svinto.h>/* DMA and register descriptions */ +#include <asm/io.h> /* LED_* I/O functions */ +#include <asm/irq.h> +#include <asm/dma.h> +#include <asm/system.h> +#include <asm/bitops.h> +#include <asm/ethernet.h> +#include <asm/cache.h> + +//#define ETHDEBUG +#define D(x) + +/* + * The name of the card. Is used for messages and in the requests for + * io regions, irqs and dma channels + */ + +static const char* cardname = "ETRAX 100LX built-in ethernet controller"; + +/* A default ethernet address. Highlevel SW will set the real one later */ + +static struct sockaddr default_mac = { + 0, + { 0x00, 0x40, 0x8C, 0xCD, 0x00, 0x00 } +}; + +/* Information that need to be kept for each board. */ +struct net_local { + struct net_device_stats stats; + struct mii_if_info mii_if; + + /* Tx control lock. This protects the transmit buffer ring + * state along with the "tx full" state of the driver. This + * means all netif_queue flow control actions are protected + * by this lock as well. + */ + spinlock_t lock; +}; + +typedef struct etrax_eth_descr +{ + etrax_dma_descr descr; + struct sk_buff* skb; +} etrax_eth_descr; + +/* Some transceivers requires special handling */ +struct transceiver_ops +{ + unsigned int oui; + void (*check_speed)(struct net_device* dev); + void (*check_duplex)(struct net_device* dev); +}; + +struct transceiver_ops* transceiver; + +/* Duplex settings */ +enum duplex +{ + half, + full, + autoneg +}; + +/* Dma descriptors etc. */ + +#define MAX_MEDIA_DATA_SIZE 1518 + +#define MIN_PACKET_LEN 46 +#define ETHER_HEAD_LEN 14 + +/* +** MDIO constants. +*/ +#define MDIO_START 0x1 +#define MDIO_READ 0x2 +#define MDIO_WRITE 0x1 +#define MDIO_PREAMBLE 0xfffffffful + +/* Broadcom specific */ +#define MDIO_AUX_CTRL_STATUS_REG 0x18 +#define MDIO_BC_FULL_DUPLEX_IND 0x1 +#define MDIO_BC_SPEED 0x2 + +/* TDK specific */ +#define MDIO_TDK_DIAGNOSTIC_REG 18 +#define MDIO_TDK_DIAGNOSTIC_RATE 0x400 +#define MDIO_TDK_DIAGNOSTIC_DPLX 0x800 + +/*Intel LXT972A specific*/ +#define MDIO_INT_STATUS_REG_2 0x0011 +#define MDIO_INT_FULL_DUPLEX_IND ( 1 << 9 ) +#define MDIO_INT_SPEED ( 1 << 14 ) + +/* Network flash constants */ +#define NET_FLASH_TIME (HZ/50) /* 20 ms */ +#define NET_FLASH_PAUSE (HZ/100) /* 10 ms */ +#define NET_LINK_UP_CHECK_INTERVAL (2*HZ) /* 2 s */ +#define NET_DUPLEX_CHECK_INTERVAL (2*HZ) /* 2 s */ + +#define NO_NETWORK_ACTIVITY 0 +#define NETWORK_ACTIVITY 1 + +#define NBR_OF_RX_DESC 64 +#define NBR_OF_TX_DESC 256 + +/* Large packets are sent directly to upper layers while small packets are */ +/* copied (to reduce memory waste). The following constant decides the breakpoint */ +#define RX_COPYBREAK 256 + +/* Due to a chip bug we need to flush the cache when descriptors are returned */ +/* to the DMA. To decrease performance impact we return descriptors in chunks. */ +/* The following constant determines the number of descriptors to return. */ +#define RX_QUEUE_THRESHOLD NBR_OF_RX_DESC/2 + +#define GET_BIT(bit,val) (((val) >> (bit)) & 0x01) + +/* Define some macros to access ETRAX 100 registers */ +#define SETF(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \ + IO_FIELD_(reg##_, field##_, val) +#define SETS(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \ + IO_STATE_(reg##_, field##_, _##val) + +static etrax_eth_descr *myNextRxDesc; /* Points to the next descriptor to + to be processed */ +static etrax_eth_descr *myLastRxDesc; /* The last processed descriptor */ +static etrax_eth_descr *myPrevRxDesc; /* The descriptor right before myNextRxDesc */ + +static etrax_eth_descr RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned(32))); + +static etrax_eth_descr* myFirstTxDesc; /* First packet not yet sent */ +static etrax_eth_descr* myLastTxDesc; /* End of send queue */ +static etrax_eth_descr* myNextTxDesc; /* Next descriptor to use */ +static etrax_eth_descr TxDescList[NBR_OF_TX_DESC] __attribute__ ((aligned(32))); + +static unsigned int network_rec_config_shadow = 0; +static unsigned int mdio_phy_addr; /* Transciever address */ + +static unsigned int network_tr_ctrl_shadow = 0; + +/* Network speed indication. */ +static struct timer_list speed_timer = TIMER_INITIALIZER(NULL, 0, 0); +static struct timer_list clear_led_timer = TIMER_INITIALIZER(NULL, 0, 0); +static int current_speed; /* Speed read from transceiver */ +static int current_speed_selection; /* Speed selected by user */ +static unsigned long led_next_time; +static int led_active; +static int rx_queue_len; + +/* Duplex */ +static struct timer_list duplex_timer = TIMER_INITIALIZER(NULL, 0, 0); +static int full_duplex; +static enum duplex current_duplex; + +/* Index to functions, as function prototypes. */ + +static int etrax_ethernet_init(void); + +static int e100_open(struct net_device *dev); +static int e100_set_mac_address(struct net_device *dev, void *addr); +static int e100_send_packet(struct sk_buff *skb, struct net_device *dev); +static irqreturn_t e100rxtx_interrupt(int irq, void *dev_id, struct pt_regs *regs); +static irqreturn_t e100nw_interrupt(int irq, void *dev_id, struct pt_regs *regs); +static void e100_rx(struct net_device *dev); +static int e100_close(struct net_device *dev); +static int e100_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); +static int e100_ethtool_ioctl(struct net_device* dev, struct ifreq *ifr); +static int e100_set_config(struct net_device* dev, struct ifmap* map); +static void e100_tx_timeout(struct net_device *dev); +static struct net_device_stats *e100_get_stats(struct net_device *dev); +static void set_multicast_list(struct net_device *dev); +static void e100_hardware_send_packet(char *buf, int length); +static void update_rx_stats(struct net_device_stats *); +static void update_tx_stats(struct net_device_stats *); +static int e100_probe_transceiver(struct net_device* dev); + +static void e100_check_speed(unsigned long priv); +static void e100_set_speed(struct net_device* dev, unsigned long speed); +static void e100_check_duplex(unsigned long priv); +static void e100_set_duplex(struct net_device* dev, enum duplex); +static void e100_negotiate(struct net_device* dev); + +static int e100_get_mdio_reg(struct net_device *dev, int phy_id, int location); +static void e100_set_mdio_reg(struct net_device *dev, int phy_id, int location, int value); + +static void e100_send_mdio_cmd(unsigned short cmd, int write_cmd); +static void e100_send_mdio_bit(unsigned char bit); +static unsigned char e100_receive_mdio_bit(void); +static void e100_reset_transceiver(struct net_device* net); + +static void e100_clear_network_leds(unsigned long dummy); +static void e100_set_network_leds(int active); + +static void broadcom_check_speed(struct net_device* dev); +static void broadcom_check_duplex(struct net_device* dev); +static void tdk_check_speed(struct net_device* dev); +static void tdk_check_duplex(struct net_device* dev); +static void intel_check_speed(struct net_device* dev); +static void intel_check_duplex(struct net_device* dev); +static void generic_check_speed(struct net_device* dev); +static void generic_check_duplex(struct net_device* dev); + +struct transceiver_ops transceivers[] = +{ + {0x1018, broadcom_check_speed, broadcom_check_duplex}, /* Broadcom */ + {0xC039, tdk_check_speed, tdk_check_duplex}, /* TDK 2120 */ + {0x039C, tdk_check_speed, tdk_check_duplex}, /* TDK 2120C */ + {0x04de, intel_check_speed, intel_check_duplex}, /* Intel LXT972A*/ + {0x0000, generic_check_speed, generic_check_duplex} /* Generic, must be last */ +}; + +#define tx_done(dev) (*R_DMA_CH0_CMD == 0) + +/* + * Check for a network adaptor of this type, and return '0' if one exists. + * If dev->base_addr == 0, probe all likely locations. + * If dev->base_addr == 1, always return failure. + * If dev->base_addr == 2, allocate space for the device and return success + * (detachable devices only). + */ + +static int __init +etrax_ethernet_init(void) +{ + struct net_device *dev; + struct net_local* np; + int i, err; + + printk(KERN_INFO + "ETRAX 100LX 10/100MBit ethernet v2.0 (c) 2000-2003 Axis Communications AB\n"); + + dev = alloc_etherdev(sizeof(struct net_local)); + np = dev->priv; + + if (!dev) + return -ENOMEM; + + dev->base_addr = (unsigned int)R_NETWORK_SA_0; /* just to have something to show */ + + /* now setup our etrax specific stuff */ + + dev->irq = NETWORK_DMA_RX_IRQ_NBR; /* we really use DMATX as well... */ + dev->dma = NETWORK_RX_DMA_NBR; + + /* fill in our handlers so the network layer can talk to us in the future */ + + dev->open = e100_open; + dev->hard_start_xmit = e100_send_packet; + dev->stop = e100_close; + dev->get_stats = e100_get_stats; + dev->set_multicast_list = set_multicast_list; + dev->set_mac_address = e100_set_mac_address; + dev->do_ioctl = e100_ioctl; + dev->set_config = e100_set_config; + dev->tx_timeout = e100_tx_timeout; + + /* Initialise the list of Etrax DMA-descriptors */ + + /* Initialise receive descriptors */ + + for (i = 0; i < NBR_OF_RX_DESC; i++) { + /* Allocate two extra cachelines to make sure that buffer used by DMA + * does not share cacheline with any other data (to avoid cache bug) + */ + RxDescList[i].skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES); + RxDescList[i].descr.ctrl = 0; + RxDescList[i].descr.sw_len = MAX_MEDIA_DATA_SIZE; + RxDescList[i].descr.next = virt_to_phys(&RxDescList[i + 1]); + RxDescList[i].descr.buf = L1_CACHE_ALIGN(virt_to_phys(RxDescList[i].skb->data)); + RxDescList[i].descr.status = 0; + RxDescList[i].descr.hw_len = 0; + prepare_rx_descriptor(&RxDescList[i].descr); + } + + RxDescList[NBR_OF_RX_DESC - 1].descr.ctrl = d_eol; + RxDescList[NBR_OF_RX_DESC - 1].descr.next = virt_to_phys(&RxDescList[0]); + rx_queue_len = 0; + + /* Initialize transmit descriptors */ + for (i = 0; i < NBR_OF_TX_DESC; i++) { + TxDescList[i].descr.ctrl = 0; + TxDescList[i].descr.sw_len = 0; + TxDescList[i].descr.next = virt_to_phys(&TxDescList[i + 1].descr); + TxDescList[i].descr.buf = 0; + TxDescList[i].descr.status = 0; + TxDescList[i].descr.hw_len = 0; + TxDescList[i].skb = 0; + } + + TxDescList[NBR_OF_TX_DESC - 1].descr.ctrl = d_eol; + TxDescList[NBR_OF_TX_DESC - 1].descr.next = virt_to_phys(&TxDescList[0].descr); + + /* Initialise initial pointers */ + + myNextRxDesc = &RxDescList[0]; + myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1]; + myPrevRxDesc = &RxDescList[NBR_OF_RX_DESC - 1]; + myFirstTxDesc = &TxDescList[0]; + myNextTxDesc = &TxDescList[0]; + myLastTxDesc = &TxDescList[NBR_OF_TX_DESC - 1]; + + /* Register device */ + err = register_netdev(dev); + if (err) { + free_netdev(dev); + return err; + } + + /* set the default MAC address */ + + e100_set_mac_address(dev, &default_mac); + + /* Initialize speed indicator stuff. */ + + current_speed = 10; + current_speed_selection = 0; /* Auto */ + speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL; + duplex_timer.data = (unsigned long)dev; + speed_timer.function = e100_check_speed; + + clear_led_timer.function = e100_clear_network_leds; + + full_duplex = 0; + current_duplex = autoneg; + duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL; + duplex_timer.data = (unsigned long)dev; + duplex_timer.function = e100_check_duplex; + + /* Initialize mii interface */ + np->mii_if.phy_id = mdio_phy_addr; + np->mii_if.phy_id_mask = 0x1f; + np->mii_if.reg_num_mask = 0x1f; + np->mii_if.dev = dev; + np->mii_if.mdio_read = e100_get_mdio_reg; + np->mii_if.mdio_write = e100_set_mdio_reg; + + /* Initialize group address registers to make sure that no */ + /* unwanted addresses are matched */ + *R_NETWORK_GA_0 = 0x00000000; + *R_NETWORK_GA_1 = 0x00000000; + return 0; +} + +/* set MAC address of the interface. called from the core after a + * SIOCSIFADDR ioctl, and from the bootup above. + */ + +static int +e100_set_mac_address(struct net_device *dev, void *p) +{ + struct net_local *np = (struct net_local *)dev->priv; + struct sockaddr *addr = p; + int i; + + spin_lock(&np->lock); /* preemption protection */ + + /* remember it */ + + memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); + + /* Write it to the hardware. + * Note the way the address is wrapped: + * *R_NETWORK_SA_0 = a0_0 | (a0_1 << 8) | (a0_2 << 16) | (a0_3 << 24); + * *R_NETWORK_SA_1 = a0_4 | (a0_5 << 8); + */ + + *R_NETWORK_SA_0 = dev->dev_addr[0] | (dev->dev_addr[1] << 8) | + (dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24); + *R_NETWORK_SA_1 = dev->dev_addr[4] | (dev->dev_addr[5] << 8); + *R_NETWORK_SA_2 = 0; + + /* show it in the log as well */ + + printk(KERN_INFO "%s: changed MAC to ", dev->name); + + for (i = 0; i < 5; i++) + printk("%02X:", dev->dev_addr[i]); + + printk("%02X\n", dev->dev_addr[i]); + + spin_unlock(&np->lock); + + return 0; +} + +/* + * Open/initialize the board. This is called (in the current kernel) + * sometime after booting when the 'ifconfig' program is run. + * + * This routine should set everything up anew at each open, even + * registers that "should" only need to be set once at boot, so that + * there is non-reboot way to recover if something goes wrong. + */ + +static int +e100_open(struct net_device *dev) +{ + unsigned long flags; + + /* enable the MDIO output pin */ + + *R_NETWORK_MGM_CTRL = IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable); + + *R_IRQ_MASK0_CLR = + IO_STATE(R_IRQ_MASK0_CLR, overrun, clr) | + IO_STATE(R_IRQ_MASK0_CLR, underrun, clr) | + IO_STATE(R_IRQ_MASK0_CLR, excessive_col, clr); + + /* clear dma0 and 1 eop and descr irq masks */ + *R_IRQ_MASK2_CLR = + IO_STATE(R_IRQ_MASK2_CLR, dma0_descr, clr) | + IO_STATE(R_IRQ_MASK2_CLR, dma0_eop, clr) | + IO_STATE(R_IRQ_MASK2_CLR, dma1_descr, clr) | + IO_STATE(R_IRQ_MASK2_CLR, dma1_eop, clr); + + /* Reset and wait for the DMA channels */ + + RESET_DMA(NETWORK_TX_DMA_NBR); + RESET_DMA(NETWORK_RX_DMA_NBR); + WAIT_DMA(NETWORK_TX_DMA_NBR); + WAIT_DMA(NETWORK_RX_DMA_NBR); + + /* Initialise the etrax network controller */ + + /* allocate the irq corresponding to the receiving DMA */ + + if (request_irq(NETWORK_DMA_RX_IRQ_NBR, e100rxtx_interrupt, + SA_SAMPLE_RANDOM, cardname, (void *)dev)) { + goto grace_exit0; + } + + /* allocate the irq corresponding to the transmitting DMA */ + + if (request_irq(NETWORK_DMA_TX_IRQ_NBR, e100rxtx_interrupt, 0, + cardname, (void *)dev)) { + goto grace_exit1; + } + + /* allocate the irq corresponding to the network errors etc */ + + if (request_irq(NETWORK_STATUS_IRQ_NBR, e100nw_interrupt, 0, + cardname, (void *)dev)) { + goto grace_exit2; + } + + /* give the HW an idea of what MAC address we want */ + + *R_NETWORK_SA_0 = dev->dev_addr[0] | (dev->dev_addr[1] << 8) | + (dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24); + *R_NETWORK_SA_1 = dev->dev_addr[4] | (dev->dev_addr[5] << 8); + *R_NETWORK_SA_2 = 0; + +#if 0 + /* use promiscuous mode for testing */ + *R_NETWORK_GA_0 = 0xffffffff; + *R_NETWORK_GA_1 = 0xffffffff; + + *R_NETWORK_REC_CONFIG = 0xd; /* broadcast rec, individ. rec, ma0 enabled */ +#else + SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, broadcast, receive); + SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, ma0, enable); + SETF(network_rec_config_shadow, R_NETWORK_REC_CONFIG, duplex, full_duplex); + *R_NETWORK_REC_CONFIG = network_rec_config_shadow; +#endif + + *R_NETWORK_GEN_CONFIG = + IO_STATE(R_NETWORK_GEN_CONFIG, phy, mii_clk) | + IO_STATE(R_NETWORK_GEN_CONFIG, enable, on); + + SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr); + SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, delay, none); + SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, cancel, dont); + SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, cd, enable); + SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, retry, enable); + SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, pad, enable); + SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, crc, enable); + *R_NETWORK_TR_CTRL = network_tr_ctrl_shadow; + + save_flags(flags); + cli(); + + /* enable the irq's for ethernet DMA */ + + *R_IRQ_MASK2_SET = + IO_STATE(R_IRQ_MASK2_SET, dma0_eop, set) | + IO_STATE(R_IRQ_MASK2_SET, dma1_eop, set); + + *R_IRQ_MASK0_SET = + IO_STATE(R_IRQ_MASK0_SET, overrun, set) | + IO_STATE(R_IRQ_MASK0_SET, underrun, set) | + IO_STATE(R_IRQ_MASK0_SET, excessive_col, set); + + /* make sure the irqs are cleared */ + + *R_DMA_CH0_CLR_INTR = IO_STATE(R_DMA_CH0_CLR_INTR, clr_eop, do); + *R_DMA_CH1_CLR_INTR = IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do); + + /* make sure the rec and transmit error counters are cleared */ + + (void)*R_REC_COUNTERS; /* dummy read */ + (void)*R_TR_COUNTERS; /* dummy read */ + + /* start the receiving DMA channel so we can receive packets from now on */ + + *R_DMA_CH1_FIRST = virt_to_phys(myNextRxDesc); + *R_DMA_CH1_CMD = IO_STATE(R_DMA_CH1_CMD, cmd, start); + + /* Set up transmit DMA channel so it can be restarted later */ + + *R_DMA_CH0_FIRST = 0; + *R_DMA_CH0_DESCR = virt_to_phys(myLastTxDesc); + + restore_flags(flags); + + /* Probe for transceiver */ + if (e100_probe_transceiver(dev)) + goto grace_exit3; + + /* Start duplex/speed timers */ + add_timer(&speed_timer); + add_timer(&duplex_timer); + + /* We are now ready to accept transmit requeusts from + * the queueing layer of the networking. + */ + netif_start_queue(dev); + + return 0; + +grace_exit3: + free_irq(NETWORK_STATUS_IRQ_NBR, (void *)dev); +grace_exit2: + free_irq(NETWORK_DMA_TX_IRQ_NBR, (void *)dev); +grace_exit1: + free_irq(NETWORK_DMA_RX_IRQ_NBR, (void *)dev); +grace_exit0: + return -EAGAIN; +} + + +static void +generic_check_speed(struct net_device* dev) +{ + unsigned long data; + data = e100_get_mdio_reg(dev, mdio_phy_addr, MII_ADVERTISE); + if ((data & ADVERTISE_100FULL) || + (data & ADVERTISE_100HALF)) + current_speed = 100; + else + current_speed = 10; +} + +static void +tdk_check_speed(struct net_device* dev) +{ + unsigned long data; + data = e100_get_mdio_reg(dev, mdio_phy_addr, MDIO_TDK_DIAGNOSTIC_REG); + current_speed = (data & MDIO_TDK_DIAGNOSTIC_RATE ? 100 : 10); +} + +static void +broadcom_check_speed(struct net_device* dev) +{ + unsigned long data; + data = e100_get_mdio_reg(dev, mdio_phy_addr, MDIO_AUX_CTRL_STATUS_REG); + current_speed = (data & MDIO_BC_SPEED ? 100 : 10); +} + +static void +intel_check_speed(struct net_device* dev) +{ + unsigned long data; + data = e100_get_mdio_reg(dev, mdio_phy_addr, MDIO_INT_STATUS_REG_2); + current_speed = (data & MDIO_INT_SPEED ? 100 : 10); +} + +static void +e100_check_speed(unsigned long priv) +{ + struct net_device* dev = (struct net_device*)priv; + static int led_initiated = 0; + unsigned long data; + int old_speed = current_speed; + + data = e100_get_mdio_reg(dev, mdio_phy_addr, MII_BMSR); + if (!(data & BMSR_LSTATUS)) { + current_speed = 0; + } else { + transceiver->check_speed(dev); + } + + if ((old_speed != current_speed) || !led_initiated) { + led_initiated = 1; + e100_set_network_leds(NO_NETWORK_ACTIVITY); + } + + /* Reinitialize the timer. */ + speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL; + add_timer(&speed_timer); +} + +static void +e100_negotiate(struct net_device* dev) +{ + unsigned short data = e100_get_mdio_reg(dev, mdio_phy_addr, MII_ADVERTISE); + + /* Discard old speed and duplex settings */ + data &= ~(ADVERTISE_100HALF | ADVERTISE_100FULL | + ADVERTISE_10HALF | ADVERTISE_10FULL); + + switch (current_speed_selection) { + case 10 : + if (current_duplex == full) + data |= ADVERTISE_10FULL; + else if (current_duplex == half) + data |= ADVERTISE_10HALF; + else + data |= ADVERTISE_10HALF | ADVERTISE_10FULL; + break; + + case 100 : + if (current_duplex == full) + data |= ADVERTISE_100FULL; + else if (current_duplex == half) + data |= ADVERTISE_100HALF; + else + data |= ADVERTISE_100HALF | ADVERTISE_100FULL; + break; + + case 0 : /* Auto */ + if (current_duplex == full) + data |= ADVERTISE_100FULL | ADVERTISE_10FULL; + else if (current_duplex == half) + data |= ADVERTISE_100HALF | ADVERTISE_10HALF; + else + data |= ADVERTISE_10HALF | ADVERTISE_10FULL | + ADVERTISE_100HALF | ADVERTISE_100FULL; + break; + + default : /* assume autoneg speed and duplex */ + data |= ADVERTISE_10HALF | ADVERTISE_10FULL | + ADVERTISE_100HALF | ADVERTISE_100FULL; + } + + e100_set_mdio_reg(dev, mdio_phy_addr, MII_ADVERTISE, data); + + /* Renegotiate with link partner */ + data = e100_get_mdio_reg(dev, mdio_phy_addr, MII_BMCR); + data |= BMCR_ANENABLE | BMCR_ANRESTART; + + e100_set_mdio_reg(dev, mdio_phy_addr, MII_BMCR, data); +} + +static void +e100_set_speed(struct net_device* dev, unsigned long speed) +{ + if (speed != current_speed_selection) { + current_speed_selection = speed; + e100_negotiate(dev); + } +} + +static void +e100_check_duplex(unsigned long priv) +{ + struct net_device *dev = (struct net_device *)priv; + struct net_local *np = (struct net_local *)dev->priv; + int old_duplex = full_duplex; + transceiver->check_duplex(dev); + if (old_duplex != full_duplex) { + /* Duplex changed */ + SETF(network_rec_config_shadow, R_NETWORK_REC_CONFIG, duplex, full_duplex); + *R_NETWORK_REC_CONFIG = network_rec_config_shadow; + } + + /* Reinitialize the timer. */ + duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL; + add_timer(&duplex_timer); + np->mii_if.full_duplex = full_duplex; +} + +static void +generic_check_duplex(struct net_device* dev) +{ + unsigned long data; + data = e100_get_mdio_reg(dev, mdio_phy_addr, MII_ADVERTISE); + if ((data & ADVERTISE_10FULL) || + (data & ADVERTISE_100FULL)) + full_duplex = 1; + else + full_duplex = 0; +} + +static void +tdk_check_duplex(struct net_device* dev) +{ + unsigned long data; + data = e100_get_mdio_reg(dev, mdio_phy_addr, MDIO_TDK_DIAGNOSTIC_REG); + full_duplex = (data & MDIO_TDK_DIAGNOSTIC_DPLX) ? 1 : 0; +} + +static void +broadcom_check_duplex(struct net_device* dev) +{ + unsigned long data; + data = e100_get_mdio_reg(dev, mdio_phy_addr, MDIO_AUX_CTRL_STATUS_REG); + full_duplex = (data & MDIO_BC_FULL_DUPLEX_IND) ? 1 : 0; +} + +static void +intel_check_duplex(struct net_device* dev) +{ + unsigned long data; + data = e100_get_mdio_reg(dev, mdio_phy_addr, MDIO_INT_STATUS_REG_2); + full_duplex = (data & MDIO_INT_FULL_DUPLEX_IND) ? 1 : 0; +} + +static void +e100_set_duplex(struct net_device* dev, enum duplex new_duplex) +{ + if (new_duplex != current_duplex) { + current_duplex = new_duplex; + e100_negotiate(dev); + } +} + +static int +e100_probe_transceiver(struct net_device* dev) +{ + unsigned int phyid_high; + unsigned int phyid_low; + unsigned int oui; + struct transceiver_ops* ops = NULL; + + /* Probe MDIO physical address */ + for (mdio_phy_addr = 0; mdio_phy_addr <= 31; mdio_phy_addr++) { + if (e100_get_mdio_reg(dev, mdio_phy_addr, MII_BMSR) != 0xffff) + break; + } + if (mdio_phy_addr == 32) + return -ENODEV; + + /* Get manufacturer */ + phyid_high = e100_get_mdio_reg(dev, mdio_phy_addr, MII_PHYSID1); + phyid_low = e100_get_mdio_reg(dev, mdio_phy_addr, MII_PHYSID2); + oui = (phyid_high << 6) | (phyid_low >> 10); + + for (ops = &transceivers[0]; ops->oui; ops++) { + if (ops->oui == oui) + break; + } + transceiver = ops; + + return 0; +} + +static int +e100_get_mdio_reg(struct net_device *dev, int phy_id, int location) +{ + unsigned short cmd; /* Data to be sent on MDIO port */ + int data; /* Data read from MDIO */ + int bitCounter; + + /* Start of frame, OP Code, Physical Address, Register Address */ + cmd = (MDIO_START << 14) | (MDIO_READ << 12) | (phy_id << 7) | + (location << 2); + + e100_send_mdio_cmd(cmd, 0); + + data = 0; + + /* Data... */ + for (bitCounter=15; bitCounter>=0 ; bitCounter--) { + data |= (e100_receive_mdio_bit() << bitCounter); + } + + return data; +} + +static void +e100_set_mdio_reg(struct net_device *dev, int phy_id, int location, int value) +{ + int bitCounter; + unsigned short cmd; + + cmd = (MDIO_START << 14) | (MDIO_WRITE << 12) | (phy_id << 7) | + (location << 2); + + e100_send_mdio_cmd(cmd, 1); + + /* Data... */ + for (bitCounter=15; bitCounter>=0 ; bitCounter--) { + e100_send_mdio_bit(GET_BIT(bitCounter, value)); + } + +} + +static void +e100_send_mdio_cmd(unsigned short cmd, int write_cmd) +{ + int bitCounter; + unsigned char data = 0x2; + + /* Preamble */ + for (bitCounter = 31; bitCounter>= 0; bitCounter--) + e100_send_mdio_bit(GET_BIT(bitCounter, MDIO_PREAMBLE)); + + for (bitCounter = 15; bitCounter >= 2; bitCounter--) + e100_send_mdio_bit(GET_BIT(bitCounter, cmd)); + + /* Turnaround */ + for (bitCounter = 1; bitCounter >= 0 ; bitCounter--) + if (write_cmd) + e100_send_mdio_bit(GET_BIT(bitCounter, data)); + else + e100_receive_mdio_bit(); +} + +static void +e100_send_mdio_bit(unsigned char bit) +{ + *R_NETWORK_MGM_CTRL = + IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable) | + IO_FIELD(R_NETWORK_MGM_CTRL, mdio, bit); + udelay(1); + *R_NETWORK_MGM_CTRL = + IO_STATE(R_NETWORK_MGM_CTRL, mdoe, enable) | + IO_MASK(R_NETWORK_MGM_CTRL, mdck) | + IO_FIELD(R_NETWORK_MGM_CTRL, mdio, bit); + udelay(1); +} + +static unsigned char +e100_receive_mdio_bit() +{ + unsigned char bit; + *R_NETWORK_MGM_CTRL = 0; + bit = IO_EXTRACT(R_NETWORK_STAT, mdio, *R_NETWORK_STAT); + udelay(1); + *R_NETWORK_MGM_CTRL = IO_MASK(R_NETWORK_MGM_CTRL, mdck); + udelay(1); + return bit; +} + +static void +e100_reset_transceiver(struct net_device* dev) +{ + unsigned short cmd; + unsigned short data; + int bitCounter; + + data = e100_get_mdio_reg(dev, mdio_phy_addr, MII_BMCR); + + cmd = (MDIO_START << 14) | (MDIO_WRITE << 12) | (mdio_phy_addr << 7) | (MII_BMCR << 2); + + e100_send_mdio_cmd(cmd, 1); + + data |= 0x8000; + + for (bitCounter = 15; bitCounter >= 0 ; bitCounter--) { + e100_send_mdio_bit(GET_BIT(bitCounter, data)); + } +} + +/* Called by upper layers if they decide it took too long to complete + * sending a packet - we need to reset and stuff. + */ + +static void +e100_tx_timeout(struct net_device *dev) +{ + struct net_local *np = (struct net_local *)dev->priv; + unsigned long flags; + + spin_lock_irqsave(&np->lock, flags); + + printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name, + tx_done(dev) ? "IRQ problem" : "network cable problem"); + + /* remember we got an error */ + + np->stats.tx_errors++; + + /* reset the TX DMA in case it has hung on something */ + + RESET_DMA(NETWORK_TX_DMA_NBR); + WAIT_DMA(NETWORK_TX_DMA_NBR); + + /* Reset the transceiver. */ + + e100_reset_transceiver(dev); + + /* and get rid of the packets that never got an interrupt */ + while (myFirstTxDesc != myNextTxDesc) + { + dev_kfree_skb(myFirstTxDesc->skb); + myFirstTxDesc->skb = 0; + myFirstTxDesc = phys_to_virt(myFirstTxDesc->descr.next); + } + + /* Set up transmit DMA channel so it can be restarted later */ + *R_DMA_CH0_FIRST = 0; + *R_DMA_CH0_DESCR = virt_to_phys(myLastTxDesc); + + /* tell the upper layers we're ok again */ + + netif_wake_queue(dev); + spin_unlock_irqrestore(&np->lock, flags); +} + + +/* This will only be invoked if the driver is _not_ in XOFF state. + * What this means is that we need not check it, and that this + * invariant will hold if we make sure that the netif_*_queue() + * calls are done at the proper times. + */ + +static int +e100_send_packet(struct sk_buff *skb, struct net_device *dev) +{ + struct net_local *np = (struct net_local *)dev->priv; + unsigned char *buf = skb->data; + unsigned long flags; + +#ifdef ETHDEBUG + printk("send packet len %d\n", length); +#endif + spin_lock_irqsave(&np->lock, flags); /* protect from tx_interrupt and ourself */ + + myNextTxDesc->skb = skb; + + dev->trans_start = jiffies; + + e100_hardware_send_packet(buf, skb->len); + + myNextTxDesc = phys_to_virt(myNextTxDesc->descr.next); + + /* Stop queue if full */ + if (myNextTxDesc == myFirstTxDesc) { + netif_stop_queue(dev); + } + + spin_unlock_irqrestore(&np->lock, flags); + + return 0; +} + +/* + * The typical workload of the driver: + * Handle the network interface interrupts. + */ + +static irqreturn_t +e100rxtx_interrupt(int irq, void *dev_id, struct pt_regs * regs) +{ + struct net_device *dev = (struct net_device *)dev_id; + struct net_local *np = (struct net_local *)dev->priv; + unsigned long irqbits = *R_IRQ_MASK2_RD; + + /* Disable RX/TX IRQs to avoid reentrancy */ + *R_IRQ_MASK2_CLR = + IO_STATE(R_IRQ_MASK2_CLR, dma0_eop, clr) | + IO_STATE(R_IRQ_MASK2_CLR, dma1_eop, clr); + + /* Handle received packets */ + if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma1_eop, active)) { + /* acknowledge the eop interrupt */ + + *R_DMA_CH1_CLR_INTR = IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do); + + /* check if one or more complete packets were indeed received */ + + while ((*R_DMA_CH1_FIRST != virt_to_phys(myNextRxDesc)) && + (myNextRxDesc != myLastRxDesc)) { + /* Take out the buffer and give it to the OS, then + * allocate a new buffer to put a packet in. + */ + e100_rx(dev); + ((struct net_local *)dev->priv)->stats.rx_packets++; + /* restart/continue on the channel, for safety */ + *R_DMA_CH1_CMD = IO_STATE(R_DMA_CH1_CMD, cmd, restart); + /* clear dma channel 1 eop/descr irq bits */ + *R_DMA_CH1_CLR_INTR = + IO_STATE(R_DMA_CH1_CLR_INTR, clr_eop, do) | + IO_STATE(R_DMA_CH1_CLR_INTR, clr_descr, do); + + /* now, we might have gotten another packet + so we have to loop back and check if so */ + } + } + + /* Report any packets that have been sent */ + while (myFirstTxDesc != phys_to_virt(*R_DMA_CH0_FIRST) && + myFirstTxDesc != myNextTxDesc) + { + np->stats.tx_bytes += myFirstTxDesc->skb->len; + np->stats.tx_packets++; + + /* dma is ready with the transmission of the data in tx_skb, so now + we can release the skb memory */ + dev_kfree_skb_irq(myFirstTxDesc->skb); + myFirstTxDesc->skb = 0; + myFirstTxDesc = phys_to_virt(myFirstTxDesc->descr.next); + } + + if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma0_eop, active)) { + /* acknowledge the eop interrupt and wake up queue */ + *R_DMA_CH0_CLR_INTR = IO_STATE(R_DMA_CH0_CLR_INTR, clr_eop, do); + netif_wake_queue(dev); + } + + /* Enable RX/TX IRQs again */ + *R_IRQ_MASK2_SET = + IO_STATE(R_IRQ_MASK2_SET, dma0_eop, set) | + IO_STATE(R_IRQ_MASK2_SET, dma1_eop, set); + + return IRQ_HANDLED; +} + +static irqreturn_t +e100nw_interrupt(int irq, void *dev_id, struct pt_regs * regs) +{ + struct net_device *dev = (struct net_device *)dev_id; + struct net_local *np = (struct net_local *)dev->priv; + unsigned long irqbits = *R_IRQ_MASK0_RD; + + /* check for underrun irq */ + if (irqbits & IO_STATE(R_IRQ_MASK0_RD, underrun, active)) { + SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr); + *R_NETWORK_TR_CTRL = network_tr_ctrl_shadow; + SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, nop); + np->stats.tx_errors++; + D(printk("ethernet receiver underrun!\n")); + } + + /* check for overrun irq */ + if (irqbits & IO_STATE(R_IRQ_MASK0_RD, overrun, active)) { + update_rx_stats(&np->stats); /* this will ack the irq */ + D(printk("ethernet receiver overrun!\n")); + } + /* check for excessive collision irq */ + if (irqbits & IO_STATE(R_IRQ_MASK0_RD, excessive_col, active)) { + SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, clr); + *R_NETWORK_TR_CTRL = network_tr_ctrl_shadow; + SETS(network_tr_ctrl_shadow, R_NETWORK_TR_CTRL, clr_error, nop); + *R_NETWORK_TR_CTRL = IO_STATE(R_NETWORK_TR_CTRL, clr_error, clr); + np->stats.tx_errors++; + D(printk("ethernet excessive collisions!\n")); + } + return IRQ_HANDLED; +} + +/* We have a good packet(s), get it/them out of the buffers. */ +static void +e100_rx(struct net_device *dev) +{ + struct sk_buff *skb; + int length = 0; + struct net_local *np = (struct net_local *)dev->priv; + unsigned char *skb_data_ptr; +#ifdef ETHDEBUG + int i; +#endif + + if (!led_active && time_after(jiffies, led_next_time)) { + /* light the network leds depending on the current speed. */ + e100_set_network_leds(NETWORK_ACTIVITY); + + /* Set the earliest time we may clear the LED */ + led_next_time = jiffies + NET_FLASH_TIME; + led_active = 1; + mod_timer(&clear_led_timer, jiffies + HZ/10); + } + + length = myNextRxDesc->descr.hw_len - 4; + ((struct net_local *)dev->priv)->stats.rx_bytes += length; + +#ifdef ETHDEBUG + printk("Got a packet of length %d:\n", length); + /* dump the first bytes in the packet */ + skb_data_ptr = (unsigned char *)phys_to_virt(myNextRxDesc->descr.buf); + for (i = 0; i < 8; i++) { + printk("%d: %.2x %.2x %.2x %.2x %.2x %.2x %.2x %.2x\n", i * 8, + skb_data_ptr[0],skb_data_ptr[1],skb_data_ptr[2],skb_data_ptr[3], + skb_data_ptr[4],skb_data_ptr[5],skb_data_ptr[6],skb_data_ptr[7]); + skb_data_ptr += 8; + } +#endif + + if (length < RX_COPYBREAK) { + /* Small packet, copy data */ + skb = dev_alloc_skb(length - ETHER_HEAD_LEN); + if (!skb) { + np->stats.rx_errors++; + printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); + return; + } + + skb_put(skb, length - ETHER_HEAD_LEN); /* allocate room for the packet body */ + skb_data_ptr = skb_push(skb, ETHER_HEAD_LEN); /* allocate room for the header */ + +#ifdef ETHDEBUG + printk("head = 0x%x, data = 0x%x, tail = 0x%x, end = 0x%x\n", + skb->head, skb->data, skb->tail, skb->end); + printk("copying packet to 0x%x.\n", skb_data_ptr); +#endif + + memcpy(skb_data_ptr, phys_to_virt(myNextRxDesc->descr.buf), length); + } + else { + /* Large packet, send directly to upper layers and allocate new + * memory (aligned to cache line boundary to avoid bug). + * Before sending the skb to upper layers we must make sure that + * skb->data points to the aligned start of the packet. + */ + int align; + struct sk_buff *new_skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES); + if (!new_skb) { + np->stats.rx_errors++; + printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name); + return; + } + skb = myNextRxDesc->skb; + align = (int)phys_to_virt(myNextRxDesc->descr.buf) - (int)skb->data; + skb_put(skb, length + align); + skb_pull(skb, align); /* Remove alignment bytes */ + myNextRxDesc->skb = new_skb; + myNextRxDesc->descr.buf = L1_CACHE_ALIGN(virt_to_phys(myNextRxDesc->skb->data)); + } + + skb->dev = dev; + skb->protocol = eth_type_trans(skb, dev); + + /* Send the packet to the upper layers */ + netif_rx(skb); + + /* Prepare for next packet */ + myNextRxDesc->descr.status = 0; + myPrevRxDesc = myNextRxDesc; + myNextRxDesc = phys_to_virt(myNextRxDesc->descr.next); + + rx_queue_len++; + + /* Check if descriptors should be returned */ + if (rx_queue_len == RX_QUEUE_THRESHOLD) { + flush_etrax_cache(); + myPrevRxDesc->descr.ctrl |= d_eol; + myLastRxDesc->descr.ctrl &= ~d_eol; + myLastRxDesc = myPrevRxDesc; + rx_queue_len = 0; + } +} + +/* The inverse routine to net_open(). */ +static int +e100_close(struct net_device *dev) +{ + struct net_local *np = (struct net_local *)dev->priv; + + printk(KERN_INFO "Closing %s.\n", dev->name); + + netif_stop_queue(dev); + + *R_IRQ_MASK0_CLR = + IO_STATE(R_IRQ_MASK0_CLR, overrun, clr) | + IO_STATE(R_IRQ_MASK0_CLR, underrun, clr) | + IO_STATE(R_IRQ_MASK0_CLR, excessive_col, clr); + + *R_IRQ_MASK2_CLR = + IO_STATE(R_IRQ_MASK2_CLR, dma0_descr, clr) | + IO_STATE(R_IRQ_MASK2_CLR, dma0_eop, clr) | + IO_STATE(R_IRQ_MASK2_CLR, dma1_descr, clr) | + IO_STATE(R_IRQ_MASK2_CLR, dma1_eop, clr); + + /* Stop the receiver and the transmitter */ + + RESET_DMA(NETWORK_TX_DMA_NBR); + RESET_DMA(NETWORK_RX_DMA_NBR); + + /* Flush the Tx and disable Rx here. */ + + free_irq(NETWORK_DMA_RX_IRQ_NBR, (void *)dev); + free_irq(NETWORK_DMA_TX_IRQ_NBR, (void *)dev); + free_irq(NETWORK_STATUS_IRQ_NBR, (void *)dev); + + /* Update the statistics here. */ + + update_rx_stats(&np->stats); + update_tx_stats(&np->stats); + + /* Stop speed/duplex timers */ + del_timer(&speed_timer); + del_timer(&duplex_timer); + + return 0; +} + +static int +e100_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + struct mii_ioctl_data *data = if_mii(ifr); + struct net_local *np = netdev_priv(dev); + + spin_lock(&np->lock); /* Preempt protection */ + switch (cmd) { + case SIOCETHTOOL: + return e100_ethtool_ioctl(dev,ifr); + case SIOCGMIIPHY: /* Get PHY address */ + data->phy_id = mdio_phy_addr; + break; + case SIOCGMIIREG: /* Read MII register */ + data->val_out = e100_get_mdio_reg(dev, mdio_phy_addr, data->reg_num); + break; + case SIOCSMIIREG: /* Write MII register */ + e100_set_mdio_reg(dev, mdio_phy_addr, data->reg_num, data->val_in); + break; + /* The ioctls below should be considered obsolete but are */ + /* still present for compatability with old scripts/apps */ + case SET_ETH_SPEED_10: /* 10 Mbps */ + e100_set_speed(dev, 10); + break; + case SET_ETH_SPEED_100: /* 100 Mbps */ + e100_set_speed(dev, 100); + break; + case SET_ETH_SPEED_AUTO: /* Auto negotiate speed */ + e100_set_speed(dev, 0); + break; + case SET_ETH_DUPLEX_HALF: /* Half duplex. */ + e100_set_duplex(dev, half); + break; + case SET_ETH_DUPLEX_FULL: /* Full duplex. */ + e100_set_duplex(dev, full); + break; + case SET_ETH_DUPLEX_AUTO: /* Autonegotiate duplex*/ + e100_set_duplex(dev, autoneg); + break; + default: + return -EINVAL; + } + spin_unlock(&np->lock); + return 0; +} + +static int +e100_ethtool_ioctl(struct net_device *dev, struct ifreq *ifr) +{ + struct ethtool_cmd ecmd; + + if (copy_from_user(&ecmd, ifr->ifr_data, sizeof (ecmd))) + return -EFAULT; + + switch (ecmd.cmd) { + case ETHTOOL_GSET: + { + memset((void *) &ecmd, 0, sizeof (ecmd)); + ecmd.supported = + SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII | + SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | + SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full; + ecmd.port = PORT_TP; + ecmd.transceiver = XCVR_EXTERNAL; + ecmd.phy_address = mdio_phy_addr; + ecmd.speed = current_speed; + ecmd.duplex = full_duplex ? DUPLEX_FULL : DUPLEX_HALF; + ecmd.advertising = ADVERTISED_TP; + if (current_duplex == autoneg && current_speed_selection == 0) + ecmd.advertising |= ADVERTISED_Autoneg; + else { + ecmd.advertising |= + ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full | + ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full; + if (current_speed_selection == 10) + ecmd.advertising &= ~(ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full); + else if (current_speed_selection == 100) + ecmd.advertising &= ~(ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full); + if (current_duplex == half) + ecmd.advertising &= ~(ADVERTISED_10baseT_Full | ADVERTISED_100baseT_Full); + else if (current_duplex == full) + ecmd.advertising &= ~(ADVERTISED_10baseT_Half | ADVERTISED_100baseT_Half); + } + ecmd.autoneg = AUTONEG_ENABLE; + if (copy_to_user(ifr->ifr_data, &ecmd, sizeof (ecmd))) + return -EFAULT; + } + break; + case ETHTOOL_SSET: + { + if (!capable(CAP_NET_ADMIN)) { + return -EPERM; + } + if (ecmd.autoneg == AUTONEG_ENABLE) { + e100_set_duplex(dev, autoneg); + e100_set_speed(dev, 0); + } else { + e100_set_duplex(dev, ecmd.duplex == DUPLEX_HALF ? half : full); + e100_set_speed(dev, ecmd.speed == SPEED_10 ? 10: 100); + } + } + break; + case ETHTOOL_GDRVINFO: + { + struct ethtool_drvinfo info; + memset((void *) &info, 0, sizeof (info)); + strncpy(info.driver, "ETRAX 100LX", sizeof(info.driver) - 1); + strncpy(info.version, "$Revision: 1.31 $", sizeof(info.version) - 1); + strncpy(info.fw_version, "N/A", sizeof(info.fw_version) - 1); + strncpy(info.bus_info, "N/A", sizeof(info.bus_info) - 1); + info.regdump_len = 0; + info.eedump_len = 0; + info.testinfo_len = 0; + if (copy_to_user(ifr->ifr_data, &info, sizeof (info))) + return -EFAULT; + } + break; + case ETHTOOL_NWAY_RST: + if (current_duplex == autoneg && current_speed_selection == 0) + e100_negotiate(dev); + break; + default: + return -EOPNOTSUPP; + break; + } + return 0; +} + +static int +e100_set_config(struct net_device *dev, struct ifmap *map) +{ + struct net_local *np = (struct net_local *)dev->priv; + spin_lock(&np->lock); /* Preempt protection */ + + switch(map->port) { + case IF_PORT_UNKNOWN: + /* Use autoneg */ + e100_set_speed(dev, 0); + e100_set_duplex(dev, autoneg); + break; + case IF_PORT_10BASET: + e100_set_speed(dev, 10); + e100_set_duplex(dev, autoneg); + break; + case IF_PORT_100BASET: + case IF_PORT_100BASETX: + e100_set_speed(dev, 100); + e100_set_duplex(dev, autoneg); + break; + case IF_PORT_100BASEFX: + case IF_PORT_10BASE2: + case IF_PORT_AUI: + spin_unlock(&np->lock); + return -EOPNOTSUPP; + break; + default: + printk(KERN_ERR "%s: Invalid media selected", dev->name); + spin_unlock(&np->lock); + return -EINVAL; + } + spin_unlock(&np->lock); + return 0; +} + +static void +update_rx_stats(struct net_device_stats *es) +{ + unsigned long r = *R_REC_COUNTERS; + /* update stats relevant to reception errors */ + es->rx_fifo_errors += IO_EXTRACT(R_REC_COUNTERS, congestion, r); + es->rx_crc_errors += IO_EXTRACT(R_REC_COUNTERS, crc_error, r); + es->rx_frame_errors += IO_EXTRACT(R_REC_COUNTERS, alignment_error, r); + es->rx_length_errors += IO_EXTRACT(R_REC_COUNTERS, oversize, r); +} + +static void +update_tx_stats(struct net_device_stats *es) +{ + unsigned long r = *R_TR_COUNTERS; + /* update stats relevant to transmission errors */ + es->collisions += + IO_EXTRACT(R_TR_COUNTERS, single_col, r) + + IO_EXTRACT(R_TR_COUNTERS, multiple_col, r); + es->tx_errors += IO_EXTRACT(R_TR_COUNTERS, deferred, r); +} + +/* + * Get the current statistics. + * This may be called with the card open or closed. + */ +static struct net_device_stats * +e100_get_stats(struct net_device *dev) +{ + struct net_local *lp = (struct net_local *)dev->priv; + unsigned long flags; + spin_lock_irqsave(&lp->lock, flags); + + update_rx_stats(&lp->stats); + update_tx_stats(&lp->stats); + + spin_unlock_irqrestore(&lp->lock, flags); + return &lp->stats; +} + +/* + * Set or clear the multicast filter for this adaptor. + * num_addrs == -1 Promiscuous mode, receive all packets + * num_addrs == 0 Normal mode, clear multicast list + * num_addrs > 0 Multicast mode, receive normal and MC packets, + * and do best-effort filtering. + */ +static void +set_multicast_list(struct net_device *dev) +{ + struct net_local *lp = (struct net_local *)dev->priv; + int num_addr = dev->mc_count; + unsigned long int lo_bits; + unsigned long int hi_bits; + spin_lock(&lp->lock); + if (dev->flags & IFF_PROMISC) + { + /* promiscuous mode */ + lo_bits = 0xfffffffful; + hi_bits = 0xfffffffful; + + /* Enable individual receive */ + SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, receive); + *R_NETWORK_REC_CONFIG = network_rec_config_shadow; + } else if (dev->flags & IFF_ALLMULTI) { + /* enable all multicasts */ + lo_bits = 0xfffffffful; + hi_bits = 0xfffffffful; + + /* Disable individual receive */ + SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard); + *R_NETWORK_REC_CONFIG = network_rec_config_shadow; + } else if (num_addr == 0) { + /* Normal, clear the mc list */ + lo_bits = 0x00000000ul; + hi_bits = 0x00000000ul; + + /* Disable individual receive */ + SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard); + *R_NETWORK_REC_CONFIG = network_rec_config_shadow; + } else { + /* MC mode, receive normal and MC packets */ + char hash_ix; + struct dev_mc_list *dmi = dev->mc_list; + int i; + char *baddr; + lo_bits = 0x00000000ul; + hi_bits = 0x00000000ul; + for (i=0; i<num_addr; i++) { + /* Calculate the hash index for the GA registers */ + + hash_ix = 0; + baddr = dmi->dmi_addr; + hash_ix ^= (*baddr) & 0x3f; + hash_ix ^= ((*baddr) >> 6) & 0x03; + ++baddr; + hash_ix ^= ((*baddr) << 2) & 0x03c; + hash_ix ^= ((*baddr) >> 4) & 0xf; + ++baddr; + hash_ix ^= ((*baddr) << 4) & 0x30; + hash_ix ^= ((*baddr) >> 2) & 0x3f; + ++baddr; + hash_ix ^= (*baddr) & 0x3f; + hash_ix ^= ((*baddr) >> 6) & 0x03; + ++baddr; + hash_ix ^= ((*baddr) << 2) & 0x03c; + hash_ix ^= ((*baddr) >> 4) & 0xf; + ++baddr; + hash_ix ^= ((*baddr) << 4) & 0x30; + hash_ix ^= ((*baddr) >> 2) & 0x3f; + + hash_ix &= 0x3f; + + if (hash_ix >= 32) { + hi_bits |= (1 << (hash_ix-32)); + } + else { + lo_bits |= (1 << hash_ix); + } + dmi = dmi->next; + } + /* Disable individual receive */ + SETS(network_rec_config_shadow, R_NETWORK_REC_CONFIG, individual, discard); + *R_NETWORK_REC_CONFIG = network_rec_config_shadow; + } + *R_NETWORK_GA_0 = lo_bits; + *R_NETWORK_GA_1 = hi_bits; + spin_unlock(&lp->lock); +} + +void +e100_hardware_send_packet(char *buf, int length) +{ + D(printk("e100 send pack, buf 0x%x len %d\n", buf, length)); + + if (!led_active && time_after(jiffies, led_next_time)) { + /* light the network leds depending on the current speed. */ + e100_set_network_leds(NETWORK_ACTIVITY); + + /* Set the earliest time we may clear the LED */ + led_next_time = jiffies + NET_FLASH_TIME; + led_active = 1; + mod_timer(&clear_led_timer, jiffies + HZ/10); + } + + /* configure the tx dma descriptor */ + myNextTxDesc->descr.sw_len = length; + myNextTxDesc->descr.ctrl = d_eop | d_eol | d_wait; + myNextTxDesc->descr.buf = virt_to_phys(buf); + + /* Move end of list */ + myLastTxDesc->descr.ctrl &= ~d_eol; + myLastTxDesc = myNextTxDesc; + + /* Restart DMA channel */ + *R_DMA_CH0_CMD = IO_STATE(R_DMA_CH0_CMD, cmd, restart); +} + +static void +e100_clear_network_leds(unsigned long dummy) +{ + if (led_active && time_after(jiffies, led_next_time)) { + e100_set_network_leds(NO_NETWORK_ACTIVITY); + + /* Set the earliest time we may set the LED */ + led_next_time = jiffies + NET_FLASH_PAUSE; + led_active = 0; + } +} + +static void +e100_set_network_leds(int active) +{ +#if defined(CONFIG_ETRAX_NETWORK_LED_ON_WHEN_LINK) + int light_leds = (active == NO_NETWORK_ACTIVITY); +#elif defined(CONFIG_ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY) + int light_leds = (active == NETWORK_ACTIVITY); +#else +#error "Define either CONFIG_ETRAX_NETWORK_LED_ON_WHEN_LINK or CONFIG_ETRAX_NETWORK_LED_ON_WHEN_ACTIVITY" +#endif + + if (!current_speed) { + /* Make LED red, link is down */ +#if defined(CONFIG_ETRAX_NETWORK_RED_ON_NO_CONNECTION) + LED_NETWORK_SET(LED_RED); +#else + LED_NETWORK_SET(LED_OFF); +#endif + } + else if (light_leds) { + if (current_speed == 10) { + LED_NETWORK_SET(LED_ORANGE); + } else { + LED_NETWORK_SET(LED_GREEN); + } + } + else { + LED_NETWORK_SET(LED_OFF); + } +} + +static int +etrax_init_module(void) +{ + return etrax_ethernet_init(); +} + +static int __init +e100_boot_setup(char* str) +{ + struct sockaddr sa = {0}; + int i; + + /* Parse the colon separated Ethernet station address */ + for (i = 0; i < ETH_ALEN; i++) { + unsigned int tmp; + if (sscanf(str + 3*i, "%2x", &tmp) != 1) { + printk(KERN_WARNING "Malformed station address"); + return 0; + } + sa.sa_data[i] = (char)tmp; + } + + default_mac = sa; + return 1; +} + +__setup("etrax100_eth=", e100_boot_setup); + +module_init(etrax_init_module); |