UM0851 datasheet(46/245 Pages) STMICROELECTRONICS

46 / 245 page

Communication device drivers

UM0851

46/245

Doc ID 16604 Rev 2

dev->hard_start_xmit = spear_eth_start_xmit;

dev->set_multicast_list = spear_eth_set_multicast_list;

dev->change_mtu = &spear_eth_change_mtu;

dev->dev_addr[0-5] = MAC ADDRESS;

/* The private data structure use by the driver is */

struct spear_eth_priv {

struct dma_mac_descr *txd_table;

struct dma_mac_descr *rxd_table;

dma_addr_t dma_tx_descrp;

dma_addr_t dma_rx_descrp;

volatile unsigned int rx_curr_descr_num;

volatile unsigned int tx_curr_descr_num;

volatile unsigned int tx_prev_descr_num;

volatile signed int tx_mac_win_size;

int tx_ring_count;

int rx_ring_count;

spinlock_t eth_lock;

struct tasklet_struct rx_tasklet;

struct tasklet_struct tx_tasklet;

struct timer_list tmr_hotplug;

/* MII interface info */

struct mii_if_info mii;

/* OS defined structs */

struct net_device *dev;

struct platform_device *pdev;

struct net_device_stats stats;

uint32_t gotcl;

/* RX */

uint64_t hw_csum_err;

uint64_t hw_csum_good;

uint32_t gorcl;

struct spear_hw_stats hw_stats;

struct mii_phy phy;

u8 spr_dma_rx_abnorm;

struct clk *spear_eth_clk;

int rx_skb_size;

int rx_sync_size;

struct resource *res;

};

PHY framework for SPEAr

The PHY abstraction layer in SPEAr provides a generic interface to support different PHYs.

The interface is defined as spear_mii_phy_probe(struct mii_phy *phy, u8 address). It is used

to probe for the PHY addresses from 0-31 across the set of known or generic PHY

interfaces maintained in the PHY table structure (struct mii_phy_def).

Below is a set of data structures used in the interface:

struct mii_phy_def {

u32 phy_id;

/* Concatenated ID1 << 16 | ID2 */

u32 phy_id_mask;

/* Significant bits */

u32 features;

/* Ethtool SUPPORTED_* defines or

0 for autodetect */

int magic_aneg;

/* Autoneg does all speed test for us */

const char *name;

const struct mii_phy_ops *ops;

};

struct mii_phy_ops {

int (*init) (struct mii_phy * phy);

UM0851 Datasheet(PDF) 46 Page - STMicroelectronics

UM0851 Datasheet(HTML) 46 Page - STMicroelectronics

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