forked from luck/tmp_suning_uos_patched
25985edced
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
1750 lines
48 KiB
C
1750 lines
48 KiB
C
/*
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* e100net.c: A network driver for the ETRAX 100LX network controller.
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*
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* Copyright (c) 1998-2002 Axis Communications AB.
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*
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* The outline of this driver comes from skeleton.c.
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/interrupt.h>
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#include <linux/ptrace.h>
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#include <linux/ioport.h>
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#include <linux/in.h>
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#include <linux/string.h>
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#include <linux/spinlock.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/bitops.h>
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#include <linux/if.h>
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#include <linux/mii.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/ethtool.h>
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#include <arch/svinto.h>/* DMA and register descriptions */
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#include <asm/io.h> /* CRIS_LED_* I/O functions */
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#include <asm/irq.h>
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#include <asm/dma.h>
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#include <asm/system.h>
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#include <asm/ethernet.h>
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#include <asm/cache.h>
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#include <arch/io_interface_mux.h>
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//#define ETHDEBUG
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#define D(x)
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/*
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* The name of the card. Is used for messages and in the requests for
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* io regions, irqs and dma channels
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*/
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static const char* cardname = "ETRAX 100LX built-in ethernet controller";
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/* A default ethernet address. Highlevel SW will set the real one later */
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static struct sockaddr default_mac = {
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0,
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{ 0x00, 0x40, 0x8C, 0xCD, 0x00, 0x00 }
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};
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/* Information that need to be kept for each board. */
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struct net_local {
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struct mii_if_info mii_if;
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/* Tx control lock. This protects the transmit buffer ring
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* state along with the "tx full" state of the driver. This
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* means all netif_queue flow control actions are protected
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* by this lock as well.
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*/
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spinlock_t lock;
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spinlock_t led_lock; /* Protect LED state */
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spinlock_t transceiver_lock; /* Protect transceiver state. */
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};
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typedef struct etrax_eth_descr
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{
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etrax_dma_descr descr;
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struct sk_buff* skb;
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} etrax_eth_descr;
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/* Some transceivers requires special handling */
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struct transceiver_ops
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{
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unsigned int oui;
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void (*check_speed)(struct net_device* dev);
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void (*check_duplex)(struct net_device* dev);
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};
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/* Duplex settings */
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enum duplex
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{
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half,
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full,
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autoneg
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};
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/* Dma descriptors etc. */
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#define MAX_MEDIA_DATA_SIZE 1522
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#define MIN_PACKET_LEN 46
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#define ETHER_HEAD_LEN 14
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/*
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** MDIO constants.
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*/
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#define MDIO_START 0x1
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#define MDIO_READ 0x2
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#define MDIO_WRITE 0x1
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#define MDIO_PREAMBLE 0xfffffffful
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/* Broadcom specific */
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#define MDIO_AUX_CTRL_STATUS_REG 0x18
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#define MDIO_BC_FULL_DUPLEX_IND 0x1
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#define MDIO_BC_SPEED 0x2
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/* TDK specific */
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#define MDIO_TDK_DIAGNOSTIC_REG 18
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#define MDIO_TDK_DIAGNOSTIC_RATE 0x400
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#define MDIO_TDK_DIAGNOSTIC_DPLX 0x800
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/*Intel LXT972A specific*/
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#define MDIO_INT_STATUS_REG_2 0x0011
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#define MDIO_INT_FULL_DUPLEX_IND (1 << 9)
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#define MDIO_INT_SPEED (1 << 14)
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/* Network flash constants */
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#define NET_FLASH_TIME (HZ/50) /* 20 ms */
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#define NET_FLASH_PAUSE (HZ/100) /* 10 ms */
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#define NET_LINK_UP_CHECK_INTERVAL (2*HZ) /* 2 s */
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#define NET_DUPLEX_CHECK_INTERVAL (2*HZ) /* 2 s */
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#define NO_NETWORK_ACTIVITY 0
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#define NETWORK_ACTIVITY 1
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#define NBR_OF_RX_DESC 32
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#define NBR_OF_TX_DESC 16
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/* Large packets are sent directly to upper layers while small packets are */
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/* copied (to reduce memory waste). The following constant decides the breakpoint */
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#define RX_COPYBREAK 256
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/* Due to a chip bug we need to flush the cache when descriptors are returned */
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/* to the DMA. To decrease performance impact we return descriptors in chunks. */
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/* The following constant determines the number of descriptors to return. */
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#define RX_QUEUE_THRESHOLD NBR_OF_RX_DESC/2
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#define GET_BIT(bit,val) (((val) >> (bit)) & 0x01)
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/* Define some macros to access ETRAX 100 registers */
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#define SETF(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \
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IO_FIELD_(reg##_, field##_, val)
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#define SETS(var, reg, field, val) var = (var & ~IO_MASK_(reg##_, field##_)) | \
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IO_STATE_(reg##_, field##_, _##val)
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static etrax_eth_descr *myNextRxDesc; /* Points to the next descriptor to
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to be processed */
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static etrax_eth_descr *myLastRxDesc; /* The last processed descriptor */
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static etrax_eth_descr RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned(32)));
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static etrax_eth_descr* myFirstTxDesc; /* First packet not yet sent */
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static etrax_eth_descr* myLastTxDesc; /* End of send queue */
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static etrax_eth_descr* myNextTxDesc; /* Next descriptor to use */
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static etrax_eth_descr TxDescList[NBR_OF_TX_DESC] __attribute__ ((aligned(32)));
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static unsigned int network_rec_config_shadow = 0;
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static unsigned int network_tr_ctrl_shadow = 0;
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/* Network speed indication. */
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static DEFINE_TIMER(speed_timer, NULL, 0, 0);
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static DEFINE_TIMER(clear_led_timer, NULL, 0, 0);
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static int current_speed; /* Speed read from transceiver */
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static int current_speed_selection; /* Speed selected by user */
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static unsigned long led_next_time;
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static int led_active;
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static int rx_queue_len;
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/* Duplex */
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static DEFINE_TIMER(duplex_timer, NULL, 0, 0);
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static int full_duplex;
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static enum duplex current_duplex;
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/* Index to functions, as function prototypes. */
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static int etrax_ethernet_init(void);
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static int e100_open(struct net_device *dev);
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static int e100_set_mac_address(struct net_device *dev, void *addr);
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static int e100_send_packet(struct sk_buff *skb, struct net_device *dev);
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static irqreturn_t e100rxtx_interrupt(int irq, void *dev_id);
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static irqreturn_t e100nw_interrupt(int irq, void *dev_id);
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static void e100_rx(struct net_device *dev);
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static int e100_close(struct net_device *dev);
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static int e100_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
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static int e100_set_config(struct net_device* dev, struct ifmap* map);
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static void e100_tx_timeout(struct net_device *dev);
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static struct net_device_stats *e100_get_stats(struct net_device *dev);
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static void set_multicast_list(struct net_device *dev);
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static void e100_hardware_send_packet(struct net_local* np, char *buf, int length);
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static void update_rx_stats(struct net_device_stats *);
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static void update_tx_stats(struct net_device_stats *);
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static int e100_probe_transceiver(struct net_device* dev);
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static void e100_check_speed(unsigned long priv);
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static void e100_set_speed(struct net_device* dev, unsigned long speed);
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static void e100_check_duplex(unsigned long priv);
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static void e100_set_duplex(struct net_device* dev, enum duplex);
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static void e100_negotiate(struct net_device* dev);
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static int e100_get_mdio_reg(struct net_device *dev, int phy_id, int location);
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static void e100_set_mdio_reg(struct net_device *dev, int phy_id, int location, int value);
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static void e100_send_mdio_cmd(unsigned short cmd, int write_cmd);
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static void e100_send_mdio_bit(unsigned char bit);
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static unsigned char e100_receive_mdio_bit(void);
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static void e100_reset_transceiver(struct net_device* net);
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static void e100_clear_network_leds(unsigned long dummy);
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static void e100_set_network_leds(int active);
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static const struct ethtool_ops e100_ethtool_ops;
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#if defined(CONFIG_ETRAX_NO_PHY)
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static void dummy_check_speed(struct net_device* dev);
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static void dummy_check_duplex(struct net_device* dev);
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#else
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static void broadcom_check_speed(struct net_device* dev);
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static void broadcom_check_duplex(struct net_device* dev);
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static void tdk_check_speed(struct net_device* dev);
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static void tdk_check_duplex(struct net_device* dev);
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static void intel_check_speed(struct net_device* dev);
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static void intel_check_duplex(struct net_device* dev);
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static void generic_check_speed(struct net_device* dev);
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static void generic_check_duplex(struct net_device* dev);
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#endif
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#ifdef CONFIG_NET_POLL_CONTROLLER
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static void e100_netpoll(struct net_device* dev);
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#endif
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static int autoneg_normal = 1;
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struct transceiver_ops transceivers[] =
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{
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#if defined(CONFIG_ETRAX_NO_PHY)
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{0x0000, dummy_check_speed, dummy_check_duplex} /* Dummy */
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#else
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{0x1018, broadcom_check_speed, broadcom_check_duplex}, /* Broadcom */
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{0xC039, tdk_check_speed, tdk_check_duplex}, /* TDK 2120 */
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{0x039C, tdk_check_speed, tdk_check_duplex}, /* TDK 2120C */
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{0x04de, intel_check_speed, intel_check_duplex}, /* Intel LXT972A*/
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{0x0000, generic_check_speed, generic_check_duplex} /* Generic, must be last */
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#endif
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};
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struct transceiver_ops* transceiver = &transceivers[0];
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static const struct net_device_ops e100_netdev_ops = {
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.ndo_open = e100_open,
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.ndo_stop = e100_close,
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.ndo_start_xmit = e100_send_packet,
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.ndo_tx_timeout = e100_tx_timeout,
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.ndo_get_stats = e100_get_stats,
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.ndo_set_multicast_list = set_multicast_list,
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.ndo_do_ioctl = e100_ioctl,
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.ndo_set_mac_address = e100_set_mac_address,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_change_mtu = eth_change_mtu,
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.ndo_set_config = e100_set_config,
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#ifdef CONFIG_NET_POLL_CONTROLLER
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.ndo_poll_controller = e100_netpoll,
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#endif
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};
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#define tx_done(dev) (*R_DMA_CH0_CMD == 0)
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/*
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* Check for a network adaptor of this type, and return '0' if one exists.
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* If dev->base_addr == 0, probe all likely locations.
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* If dev->base_addr == 1, always return failure.
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* If dev->base_addr == 2, allocate space for the device and return success
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* (detachable devices only).
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*/
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static int __init
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etrax_ethernet_init(void)
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{
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struct net_device *dev;
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struct net_local* np;
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int i, err;
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printk(KERN_INFO
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"ETRAX 100LX 10/100MBit ethernet v2.0 (c) 1998-2007 Axis Communications AB\n");
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if (cris_request_io_interface(if_eth, cardname)) {
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printk(KERN_CRIT "etrax_ethernet_init failed to get IO interface\n");
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return -EBUSY;
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}
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dev = alloc_etherdev(sizeof(struct net_local));
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if (!dev)
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return -ENOMEM;
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np = netdev_priv(dev);
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/* we do our own locking */
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dev->features |= NETIF_F_LLTX;
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dev->base_addr = (unsigned int)R_NETWORK_SA_0; /* just to have something to show */
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/* now setup our etrax specific stuff */
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dev->irq = NETWORK_DMA_RX_IRQ_NBR; /* we really use DMATX as well... */
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dev->dma = NETWORK_RX_DMA_NBR;
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/* fill in our handlers so the network layer can talk to us in the future */
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dev->ethtool_ops = &e100_ethtool_ops;
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dev->netdev_ops = &e100_netdev_ops;
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spin_lock_init(&np->lock);
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spin_lock_init(&np->led_lock);
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spin_lock_init(&np->transceiver_lock);
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/* Initialise the list of Etrax DMA-descriptors */
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/* Initialise receive descriptors */
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for (i = 0; i < NBR_OF_RX_DESC; i++) {
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/* Allocate two extra cachelines to make sure that buffer used
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* by DMA does not share cacheline with any other data (to
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* avoid cache bug)
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*/
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RxDescList[i].skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
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if (!RxDescList[i].skb)
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return -ENOMEM;
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RxDescList[i].descr.ctrl = 0;
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RxDescList[i].descr.sw_len = MAX_MEDIA_DATA_SIZE;
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RxDescList[i].descr.next = virt_to_phys(&RxDescList[i + 1]);
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RxDescList[i].descr.buf = L1_CACHE_ALIGN(virt_to_phys(RxDescList[i].skb->data));
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RxDescList[i].descr.status = 0;
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RxDescList[i].descr.hw_len = 0;
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prepare_rx_descriptor(&RxDescList[i].descr);
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}
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RxDescList[NBR_OF_RX_DESC - 1].descr.ctrl = d_eol;
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RxDescList[NBR_OF_RX_DESC - 1].descr.next = virt_to_phys(&RxDescList[0]);
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rx_queue_len = 0;
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/* Initialize transmit descriptors */
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for (i = 0; i < NBR_OF_TX_DESC; i++) {
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TxDescList[i].descr.ctrl = 0;
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TxDescList[i].descr.sw_len = 0;
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TxDescList[i].descr.next = virt_to_phys(&TxDescList[i + 1].descr);
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TxDescList[i].descr.buf = 0;
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TxDescList[i].descr.status = 0;
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TxDescList[i].descr.hw_len = 0;
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TxDescList[i].skb = 0;
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}
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TxDescList[NBR_OF_TX_DESC - 1].descr.ctrl = d_eol;
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TxDescList[NBR_OF_TX_DESC - 1].descr.next = virt_to_phys(&TxDescList[0].descr);
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/* Initialise initial pointers */
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myNextRxDesc = &RxDescList[0];
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myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1];
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myFirstTxDesc = &TxDescList[0];
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myNextTxDesc = &TxDescList[0];
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myLastTxDesc = &TxDescList[NBR_OF_TX_DESC - 1];
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/* Register device */
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err = register_netdev(dev);
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if (err) {
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free_netdev(dev);
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return err;
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}
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/* set the default MAC address */
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e100_set_mac_address(dev, &default_mac);
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/* Initialize speed indicator stuff. */
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current_speed = 10;
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current_speed_selection = 0; /* Auto */
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speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
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speed_timer.data = (unsigned long)dev;
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speed_timer.function = e100_check_speed;
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clear_led_timer.function = e100_clear_network_leds;
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clear_led_timer.data = (unsigned long)dev;
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full_duplex = 0;
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current_duplex = autoneg;
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duplex_timer.expires = jiffies + NET_DUPLEX_CHECK_INTERVAL;
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duplex_timer.data = (unsigned long)dev;
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duplex_timer.function = e100_check_duplex;
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/* Initialize mii interface */
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np->mii_if.phy_id_mask = 0x1f;
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np->mii_if.reg_num_mask = 0x1f;
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np->mii_if.dev = dev;
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np->mii_if.mdio_read = e100_get_mdio_reg;
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np->mii_if.mdio_write = e100_set_mdio_reg;
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/* Initialize group address registers to make sure that no */
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/* unwanted addresses are matched */
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*R_NETWORK_GA_0 = 0x00000000;
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*R_NETWORK_GA_1 = 0x00000000;
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/* Initialize next time the led can flash */
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led_next_time = jiffies;
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return 0;
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}
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/* set MAC address of the interface. called from the core after a
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* SIOCSIFADDR ioctl, and from the bootup above.
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*/
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static int
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e100_set_mac_address(struct net_device *dev, void *p)
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{
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struct net_local *np = netdev_priv(dev);
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struct sockaddr *addr = p;
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spin_lock(&np->lock); /* preemption protection */
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/* remember it */
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memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
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/* Write it to the hardware.
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* Note the way the address is wrapped:
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* *R_NETWORK_SA_0 = a0_0 | (a0_1 << 8) | (a0_2 << 16) | (a0_3 << 24);
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* *R_NETWORK_SA_1 = a0_4 | (a0_5 << 8);
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*/
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*R_NETWORK_SA_0 = dev->dev_addr[0] | (dev->dev_addr[1] << 8) |
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(dev->dev_addr[2] << 16) | (dev->dev_addr[3] << 24);
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*R_NETWORK_SA_1 = dev->dev_addr[4] | (dev->dev_addr[5] << 8);
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*R_NETWORK_SA_2 = 0;
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/* show it in the log as well */
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printk(KERN_INFO "%s: changed MAC to %pM\n", dev->name, dev->dev_addr);
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spin_unlock(&np->lock);
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return 0;
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}
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/*
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* Open/initialize the board. This is called (in the current kernel)
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* sometime after booting when the 'ifconfig' program is run.
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*
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* 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,
|
|
IRQF_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;
|
|
}
|
|
|
|
/*
|
|
* Always allocate the DMA channels after the IRQ,
|
|
* and clean up on failure.
|
|
*/
|
|
|
|
if (cris_request_dma(NETWORK_TX_DMA_NBR,
|
|
cardname,
|
|
DMA_VERBOSE_ON_ERROR,
|
|
dma_eth)) {
|
|
goto grace_exit3;
|
|
}
|
|
|
|
if (cris_request_dma(NETWORK_RX_DMA_NBR,
|
|
cardname,
|
|
DMA_VERBOSE_ON_ERROR,
|
|
dma_eth)) {
|
|
goto grace_exit4;
|
|
}
|
|
|
|
/* 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, max_size, size1522);
|
|
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;
|
|
|
|
local_irq_save(flags);
|
|
|
|
/* 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);
|
|
netif_start_queue(dev);
|
|
|
|
local_irq_restore(flags);
|
|
|
|
/* Probe for transceiver */
|
|
if (e100_probe_transceiver(dev))
|
|
goto grace_exit5;
|
|
|
|
/* 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_carrier_on(dev);
|
|
|
|
return 0;
|
|
|
|
grace_exit5:
|
|
cris_free_dma(NETWORK_RX_DMA_NBR, cardname);
|
|
grace_exit4:
|
|
cris_free_dma(NETWORK_TX_DMA_NBR, cardname);
|
|
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;
|
|
}
|
|
|
|
#if defined(CONFIG_ETRAX_NO_PHY)
|
|
static void
|
|
dummy_check_speed(struct net_device* dev)
|
|
{
|
|
current_speed = 100;
|
|
}
|
|
#else
|
|
static void
|
|
generic_check_speed(struct net_device* dev)
|
|
{
|
|
unsigned long data;
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
data = e100_get_mdio_reg(dev, np->mii_if.phy_id, 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;
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
|
|
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;
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
|
|
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;
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
|
|
MDIO_INT_STATUS_REG_2);
|
|
current_speed = (data & MDIO_INT_SPEED ? 100 : 10);
|
|
}
|
|
#endif
|
|
static void
|
|
e100_check_speed(unsigned long priv)
|
|
{
|
|
struct net_device* dev = (struct net_device*)priv;
|
|
struct net_local *np = netdev_priv(dev);
|
|
static int led_initiated = 0;
|
|
unsigned long data;
|
|
int old_speed = current_speed;
|
|
|
|
spin_lock(&np->transceiver_lock);
|
|
|
|
data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMSR);
|
|
if (!(data & BMSR_LSTATUS)) {
|
|
current_speed = 0;
|
|
} else {
|
|
transceiver->check_speed(dev);
|
|
}
|
|
|
|
spin_lock(&np->led_lock);
|
|
if ((old_speed != current_speed) || !led_initiated) {
|
|
led_initiated = 1;
|
|
e100_set_network_leds(NO_NETWORK_ACTIVITY);
|
|
if (current_speed)
|
|
netif_carrier_on(dev);
|
|
else
|
|
netif_carrier_off(dev);
|
|
}
|
|
spin_unlock(&np->led_lock);
|
|
|
|
/* Reinitialize the timer. */
|
|
speed_timer.expires = jiffies + NET_LINK_UP_CHECK_INTERVAL;
|
|
add_timer(&speed_timer);
|
|
|
|
spin_unlock(&np->transceiver_lock);
|
|
}
|
|
|
|
static void
|
|
e100_negotiate(struct net_device* dev)
|
|
{
|
|
struct net_local *np = netdev_priv(dev);
|
|
unsigned short data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
|
|
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;
|
|
break;
|
|
}
|
|
|
|
e100_set_mdio_reg(dev, np->mii_if.phy_id, MII_ADVERTISE, data);
|
|
|
|
data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR);
|
|
if (autoneg_normal) {
|
|
/* Renegotiate with link partner */
|
|
data |= BMCR_ANENABLE | BMCR_ANRESTART;
|
|
} else {
|
|
/* Don't negotiate speed or duplex */
|
|
data &= ~(BMCR_ANENABLE | BMCR_ANRESTART);
|
|
|
|
/* Set speed and duplex static */
|
|
if (current_speed_selection == 10)
|
|
data &= ~BMCR_SPEED100;
|
|
else
|
|
data |= BMCR_SPEED100;
|
|
|
|
if (current_duplex != full)
|
|
data &= ~BMCR_FULLDPLX;
|
|
else
|
|
data |= BMCR_FULLDPLX;
|
|
}
|
|
e100_set_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR, data);
|
|
}
|
|
|
|
static void
|
|
e100_set_speed(struct net_device* dev, unsigned long speed)
|
|
{
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
spin_lock(&np->transceiver_lock);
|
|
if (speed != current_speed_selection) {
|
|
current_speed_selection = speed;
|
|
e100_negotiate(dev);
|
|
}
|
|
spin_unlock(&np->transceiver_lock);
|
|
}
|
|
|
|
static void
|
|
e100_check_duplex(unsigned long priv)
|
|
{
|
|
struct net_device *dev = (struct net_device *)priv;
|
|
struct net_local *np = netdev_priv(dev);
|
|
int old_duplex;
|
|
|
|
spin_lock(&np->transceiver_lock);
|
|
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;
|
|
spin_unlock(&np->transceiver_lock);
|
|
}
|
|
#if defined(CONFIG_ETRAX_NO_PHY)
|
|
static void
|
|
dummy_check_duplex(struct net_device* dev)
|
|
{
|
|
full_duplex = 1;
|
|
}
|
|
#else
|
|
static void
|
|
generic_check_duplex(struct net_device* dev)
|
|
{
|
|
unsigned long data;
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
data = e100_get_mdio_reg(dev, np->mii_if.phy_id, 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;
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
|
|
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;
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
|
|
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;
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
data = e100_get_mdio_reg(dev, np->mii_if.phy_id,
|
|
MDIO_INT_STATUS_REG_2);
|
|
full_duplex = (data & MDIO_INT_FULL_DUPLEX_IND) ? 1 : 0;
|
|
}
|
|
#endif
|
|
static void
|
|
e100_set_duplex(struct net_device* dev, enum duplex new_duplex)
|
|
{
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
spin_lock(&np->transceiver_lock);
|
|
if (new_duplex != current_duplex) {
|
|
current_duplex = new_duplex;
|
|
e100_negotiate(dev);
|
|
}
|
|
spin_unlock(&np->transceiver_lock);
|
|
}
|
|
|
|
static int
|
|
e100_probe_transceiver(struct net_device* dev)
|
|
{
|
|
int ret = 0;
|
|
|
|
#if !defined(CONFIG_ETRAX_NO_PHY)
|
|
unsigned int phyid_high;
|
|
unsigned int phyid_low;
|
|
unsigned int oui;
|
|
struct transceiver_ops* ops = NULL;
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
spin_lock(&np->transceiver_lock);
|
|
|
|
/* Probe MDIO physical address */
|
|
for (np->mii_if.phy_id = 0; np->mii_if.phy_id <= 31;
|
|
np->mii_if.phy_id++) {
|
|
if (e100_get_mdio_reg(dev,
|
|
np->mii_if.phy_id, MII_BMSR) != 0xffff)
|
|
break;
|
|
}
|
|
if (np->mii_if.phy_id == 32) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
/* Get manufacturer */
|
|
phyid_high = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_PHYSID1);
|
|
phyid_low = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_PHYSID2);
|
|
oui = (phyid_high << 6) | (phyid_low >> 10);
|
|
|
|
for (ops = &transceivers[0]; ops->oui; ops++) {
|
|
if (ops->oui == oui)
|
|
break;
|
|
}
|
|
transceiver = ops;
|
|
out:
|
|
spin_unlock(&np->transceiver_lock);
|
|
#endif
|
|
return ret;
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct net_local *np = netdev_priv(dev);
|
|
unsigned short cmd;
|
|
unsigned short data;
|
|
int bitCounter;
|
|
|
|
data = e100_get_mdio_reg(dev, np->mii_if.phy_id, MII_BMCR);
|
|
|
|
cmd = (MDIO_START << 14) | (MDIO_WRITE << 12) | (np->mii_if.phy_id << 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 = netdev_priv(dev);
|
|
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 */
|
|
|
|
dev->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 = netdev_priv(dev);
|
|
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; /* NETIF_F_LLTX driver :( */
|
|
|
|
e100_hardware_send_packet(np, 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 NETDEV_TX_OK;
|
|
}
|
|
|
|
/*
|
|
* The typical workload of the driver:
|
|
* Handle the network interface interrupts.
|
|
*/
|
|
|
|
static irqreturn_t
|
|
e100rxtx_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = (struct net_device *)dev_id;
|
|
struct net_local *np = netdev_priv(dev);
|
|
unsigned long irqbits;
|
|
|
|
/*
|
|
* Note that both rx and tx interrupts are blocked at this point,
|
|
* regardless of which got us here.
|
|
*/
|
|
|
|
irqbits = *R_IRQ_MASK2_RD;
|
|
|
|
/* 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);
|
|
dev->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 (virt_to_phys(myFirstTxDesc) != *R_DMA_CH0_FIRST &&
|
|
(netif_queue_stopped(dev) || myFirstTxDesc != myNextTxDesc)) {
|
|
dev->stats.tx_bytes += myFirstTxDesc->skb->len;
|
|
dev->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);
|
|
/* Wake up queue. */
|
|
netif_wake_queue(dev);
|
|
}
|
|
|
|
if (irqbits & IO_STATE(R_IRQ_MASK2_RD, dma0_eop, active)) {
|
|
/* acknowledge the eop interrupt. */
|
|
*R_DMA_CH0_CLR_INTR = IO_STATE(R_DMA_CH0_CLR_INTR, clr_eop, do);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t
|
|
e100nw_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = (struct net_device *)dev_id;
|
|
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);
|
|
dev->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(&dev->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);
|
|
dev->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 = netdev_priv(dev);
|
|
unsigned char *skb_data_ptr;
|
|
#ifdef ETHDEBUG
|
|
int i;
|
|
#endif
|
|
etrax_eth_descr *prevRxDesc; /* The descriptor right before myNextRxDesc */
|
|
spin_lock(&np->led_lock);
|
|
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);
|
|
}
|
|
spin_unlock(&np->led_lock);
|
|
|
|
length = myNextRxDesc->descr.hw_len - 4;
|
|
dev->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) {
|
|
dev->stats.rx_errors++;
|
|
printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
|
|
goto update_nextrxdesc;
|
|
}
|
|
|
|
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_pointer(skb),
|
|
skb_end_pointer(skb));
|
|
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) {
|
|
dev->stats.rx_errors++;
|
|
printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", dev->name);
|
|
goto update_nextrxdesc;
|
|
}
|
|
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->protocol = eth_type_trans(skb, dev);
|
|
|
|
/* Send the packet to the upper layers */
|
|
netif_rx(skb);
|
|
|
|
update_nextrxdesc:
|
|
/* Prepare for next packet */
|
|
myNextRxDesc->descr.status = 0;
|
|
prevRxDesc = 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();
|
|
prevRxDesc->descr.ctrl |= d_eol;
|
|
myLastRxDesc->descr.ctrl &= ~d_eol;
|
|
myLastRxDesc = prevRxDesc;
|
|
rx_queue_len = 0;
|
|
}
|
|
}
|
|
|
|
/* The inverse routine to net_open(). */
|
|
static int
|
|
e100_close(struct net_device *dev)
|
|
{
|
|
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);
|
|
|
|
cris_free_dma(NETWORK_TX_DMA_NBR, cardname);
|
|
cris_free_dma(NETWORK_RX_DMA_NBR, cardname);
|
|
|
|
/* Update the statistics here. */
|
|
|
|
update_rx_stats(&dev->stats);
|
|
update_tx_stats(&dev->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);
|
|
int rc = 0;
|
|
int old_autoneg;
|
|
|
|
spin_lock(&np->lock); /* Preempt protection */
|
|
switch (cmd) {
|
|
/* The ioctls below should be considered obsolete but are */
|
|
/* still present for compatibility 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: /* Auto-negotiate duplex */
|
|
e100_set_duplex(dev, autoneg);
|
|
break;
|
|
case SET_ETH_AUTONEG:
|
|
old_autoneg = autoneg_normal;
|
|
autoneg_normal = *(int*)data;
|
|
if (autoneg_normal != old_autoneg)
|
|
e100_negotiate(dev);
|
|
break;
|
|
default:
|
|
rc = generic_mii_ioctl(&np->mii_if, if_mii(ifr),
|
|
cmd, NULL);
|
|
break;
|
|
}
|
|
spin_unlock(&np->lock);
|
|
return rc;
|
|
}
|
|
|
|
static int e100_get_settings(struct net_device *dev,
|
|
struct ethtool_cmd *cmd)
|
|
{
|
|
struct net_local *np = netdev_priv(dev);
|
|
int err;
|
|
|
|
spin_lock_irq(&np->lock);
|
|
err = mii_ethtool_gset(&np->mii_if, cmd);
|
|
spin_unlock_irq(&np->lock);
|
|
|
|
/* The PHY may support 1000baseT, but the Etrax100 does not. */
|
|
cmd->supported &= ~(SUPPORTED_1000baseT_Half
|
|
| SUPPORTED_1000baseT_Full);
|
|
return err;
|
|
}
|
|
|
|
static int e100_set_settings(struct net_device *dev,
|
|
struct ethtool_cmd *ecmd)
|
|
{
|
|
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);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void e100_get_drvinfo(struct net_device *dev,
|
|
struct ethtool_drvinfo *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);
|
|
}
|
|
|
|
static int e100_nway_reset(struct net_device *dev)
|
|
{
|
|
if (current_duplex == autoneg && current_speed_selection == 0)
|
|
e100_negotiate(dev);
|
|
return 0;
|
|
}
|
|
|
|
static const struct ethtool_ops e100_ethtool_ops = {
|
|
.get_settings = e100_get_settings,
|
|
.set_settings = e100_set_settings,
|
|
.get_drvinfo = e100_get_drvinfo,
|
|
.nway_reset = e100_nway_reset,
|
|
.get_link = ethtool_op_get_link,
|
|
};
|
|
|
|
static int
|
|
e100_set_config(struct net_device *dev, struct ifmap *map)
|
|
{
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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 = netdev_priv(dev);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&lp->lock, flags);
|
|
|
|
update_rx_stats(&dev->stats);
|
|
update_tx_stats(&dev->stats);
|
|
|
|
spin_unlock_irqrestore(&lp->lock, flags);
|
|
return &dev->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 = netdev_priv(dev);
|
|
int num_addr = netdev_mc_count(dev);
|
|
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 netdev_hw_addr *ha;
|
|
char *baddr;
|
|
|
|
lo_bits = 0x00000000ul;
|
|
hi_bits = 0x00000000ul;
|
|
netdev_for_each_mc_addr(ha, dev) {
|
|
/* Calculate the hash index for the GA registers */
|
|
|
|
hash_ix = 0;
|
|
baddr = ha->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);
|
|
}
|
|
}
|
|
/* 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(struct net_local *np, char *buf, int length)
|
|
{
|
|
D(printk("e100 send pack, buf 0x%x len %d\n", buf, length));
|
|
|
|
spin_lock(&np->led_lock);
|
|
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);
|
|
}
|
|
spin_unlock(&np->led_lock);
|
|
|
|
/* 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)
|
|
{
|
|
struct net_device *dev = (struct net_device *)dummy;
|
|
struct net_local *np = netdev_priv(dev);
|
|
|
|
spin_lock(&np->led_lock);
|
|
|
|
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;
|
|
}
|
|
|
|
spin_unlock(&np->led_lock);
|
|
}
|
|
|
|
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 */
|
|
CRIS_LED_NETWORK_SET(CRIS_LED_OFF);
|
|
} else if (light_leds) {
|
|
if (current_speed == 10) {
|
|
CRIS_LED_NETWORK_SET(CRIS_LED_ORANGE);
|
|
} else {
|
|
CRIS_LED_NETWORK_SET(CRIS_LED_GREEN);
|
|
}
|
|
} else {
|
|
CRIS_LED_NETWORK_SET(CRIS_LED_OFF);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
static void
|
|
e100_netpoll(struct net_device* netdev)
|
|
{
|
|
e100rxtx_interrupt(NETWORK_DMA_TX_IRQ_NBR, netdev, NULL);
|
|
}
|
|
#endif
|
|
|
|
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);
|