if_h8max.c

来自「eCos操作系统源码」· C语言 代码 · 共 112 行

//==========================================================================
//
//      if_h8max.c
//
//      Ethernet device driver for H8MAX board
//
//==========================================================================
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// -------------------------------------------
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// Portions of this software may have been derived from OpenBSD or other sources,
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//==========================================================================

#include <pkgconf/system.h>
#include <cyg/infra/cyg_type.h>
#include <cyg/hal/hal_arch.h>
#include <cyg/infra/diag.h>
#include <cyg/hal/drv_api.h>
#include <cyg/io/eth/eth_drv.h>
#include <cyg/io/eth/netdev.h>

#define DP_CARD_RESET 0x1f

#include <cyg/io/dp83902a.h>

void ns_dp83902a_plf_init(dp83902a_priv_data_t *dp)
{
    static struct {
	unsigned short offset;
	unsigned short data;    
    } init_data[] = {
        {DP_DCR, 0x49},  // Wordwide access
        {DP_RBCH, 0},    // Remote byte count
        {DP_RBCL, 0},
        {DP_ISR, 0xFF},  // Clear any pending interrupts
        {DP_IMR, 0x00},  // Mask all interrupts 
        {DP_RCR, 0x20},  // Monitor
        {DP_TCR, 0x02},  // loopback
        {DP_RBCH, 32/2}, // Remote byte count
        {DP_RBCL, 0},
        {DP_RSAL, 0},    // Remote address
        {DP_RSAH, 0},
        {DP_CR, DP_CR_START|DP_CR_RDMA}  // Read data
    };
    unsigned short prom[32];
    int cnt,tmp;

    HAL_READ_UINT8(dp->base+(DP_CARD_RESET<<1)+1, tmp);
    HAL_WRITE_UINT16(dp->base+(DP_CARD_RESET<<1), tmp);
    dp->data = dp->base+(DP_DATAPORT<<1);
    // Wait for card
    do {
	int cnt;
	DP_IN(dp->base, DP_ISR, tmp);
	for (cnt=0; cnt< 1024; cnt++);
    } while (0 == (tmp & DP_ISR_RESET));
    if (dp->hardwired_esa)
        return ;

    for (cnt=0; cnt<sizeof(init_data)/sizeof(init_data[0]); cnt++)
        DP_OUT(dp->base, init_data[cnt].offset, init_data[cnt].data);
    for (cnt = 0;  cnt < 32/2;  cnt++) {
        DP_IN_DATA(dp->data, prom[cnt]);
    }
    if ((prom[0] == 0xffff) && (prom[1] == 0xffff) && (prom[2] == 0xffff)) {
        dp->base = 0;
	return ;
    }
    DP_OUT(dp->base, DP_CR, DP_CR_NODMA | DP_CR_PAGE1);
    for (cnt = 0; cnt < 6; cnt ++) {
	DP_OUT(dp->base, DP_P1_PAR0+cnt, prom[cnt] >> 8);
    }
}