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/* Ethernet test */
 
#include "support.h"
 
typedef struct FILE FILE;
 
#include "../peripheral/fields.h"
#include "../peripheral/dma.h"
#include "../peripheral/ethernet.h"
 
#define ETH_BASE 0x88000000LU
#define DMA_BASE 0x90000000LU
 
typedef volatile unsigned long *REGISTER;
 
REGISTER eth_moder = (unsigned long *)(ETH_BASE + ETH_MODER),
	eth_int_source = (unsigned long *)(ETH_BASE + ETH_INT_SOURCE),
	eth_int_mask = (unsigned long *)(ETH_BASE + ETH_INT_MASK),
	eth_ipgt = (unsigned long *)(ETH_BASE + ETH_IPGT),
	eth_ipgr1 = (unsigned long *)(ETH_BASE + ETH_IPGR1),
	eth_ipgr2 = (unsigned long *)(ETH_BASE + ETH_IPGR2),
	eth_packetlen = (unsigned long *)(ETH_BASE + ETH_PACKETLEN),
	eth_collconf = (unsigned long *)(ETH_BASE + ETH_COLLCONF),
	eth_rx_bd_adr = (unsigned long *)(ETH_BASE + ETH_RX_BD_ADR),
	eth_controlmoder = (unsigned long *)(ETH_BASE + ETH_CTRLMODER),
	eth_miimoder = (unsigned long *)(ETH_BASE + ETH_MIIMODER),
	eth_miicommand = (unsigned long *)(ETH_BASE + ETH_MIICOMMAND),
	eth_miiaddress = (unsigned long *)(ETH_BASE + ETH_MIIADDRESS),
	eth_miitx_data = (unsigned long *)(ETH_BASE + ETH_MIITX_DATA),
	eth_miirx_data = (unsigned long *)(ETH_BASE + ETH_MIIRX_DATA),
	eth_miistatus = (unsigned long *)(ETH_BASE + ETH_MIISTATUS),
	eth_mac_addr0 = (unsigned long *)(ETH_BASE + ETH_MAC_ADDR0),
	eth_mac_addr1 = (unsigned long *)(ETH_BASE + ETH_MAC_ADDR1),
	eth_bd_base = (unsigned long *)(ETH_BASE + ETH_BD_BASE),
	dma_csr = (unsigned long *)(DMA_BASE + DMA_CSR),
	dma_int_msk_a = (unsigned long *)(DMA_BASE + DMA_INT_MSK_A),
	dma_int_msk_b = (unsigned long *)(DMA_BASE + DMA_INT_MSK_B),
	dma_int_src_a = (unsigned long *)(DMA_BASE + DMA_INT_SRC_A),
	dma_int_src_b = (unsigned long *)(DMA_BASE + DMA_INT_SRC_B),
	dma_ch0_csr = (unsigned long *)(DMA_BASE + DMA_CH_BASE + DMA_CH_CSR),
	dma_ch0_sz = (unsigned long *)(DMA_BASE + DMA_CH_BASE + DMA_CH_SZ),
	dma_ch0_a0 = (unsigned long *)(DMA_BASE + DMA_CH_BASE + DMA_CH_A0),
	dma_ch0_am0 = (unsigned long *)(DMA_BASE + DMA_CH_BASE + DMA_CH_AM0),
	dma_ch0_a1 = (unsigned long *)(DMA_BASE + DMA_CH_BASE + DMA_CH_A1),
	dma_ch0_am1 = (unsigned long *)(DMA_BASE + DMA_CH_BASE + DMA_CH_AM1),
	dma_ch0_desc = (unsigned long *)(DMA_BASE + DMA_CH_BASE + DMA_CH_DESC);
 
struct DMA_DESCRIPTOR
{
	unsigned long csr;
	unsigned long adr0;
	unsigned long adr1;
	unsigned long next;
};
 
void transmit_one_packet( void )
{
	unsigned i;
	unsigned char packet[1003];
	struct DMA_DESCRIPTOR desc;
 
	/* Initialize packet */
	for ( i = 0; i < sizeof(packet); ++ i )
		packet[i] = (unsigned char)i;
 
	/* Set Ethernet BD size */
	*eth_bd_base = sizeof(packet) << ETH_TX_BD_LENGTH_OFFSET;
 
	/* Set dma stuff */
	desc.csr = 1600; /* transfer size; Ethernet will stop the DMA after packet is sent */
	desc.adr0 = (unsigned long)packet;
	desc.adr1 = ETH_BASE + ETH_DMA_RX_TX;
	desc.csr |= FLAG_MASK( DMA_DESC_CSR, EOL ) | FLAG_MASK( DMA_DESC_CSR, INC_SRC );
	desc.next = 0xDEADDEADUL; /* just to help debugging */
	*dma_ch0_sz = 1UL << DMA_CH_SZ_CHK_SZ_OFFSET; /* Chunk size = 1 word */
	*dma_ch0_desc = (unsigned long)&desc; /* Tell DMA channel where the descriptor is */
 
	/* Start DMA (it will wait for request from Ethernet) */
	*dma_ch0_csr = FLAG_MASK( DMA_CH_CSR, CH_EN ) /* Enable channel */ |
		FLAG_MASK( DMA_CH_CSR, USE_ED ) /* Use linked lists */ |
		FLAG_MASK( DMA_CH_CSR, MODE ) /* Wait for HW handshake */ |
		FLAG_MASK( DMA_CH_CSR, DST_SEL ) /* Interface 1 is the destination (meaningless for simulation) */;
 
	/* Start Ethernet */
	*eth_bd_base |= FLAG_MASK( ETH_TX_BD, READY ); /* signal BD as ready */
	*eth_moder |= FLAG_MASK( ETH_MODER, TXEN ) | FLAG_MASK( ETH_MODER, DMAEN );
 
	/* Now wait till DMA finishes */
	while ( TEST_FLAG( *dma_ch0_csr, DMA_CH_CSR, BUSY ) )
		;
}
 
 
int main()
{
	printf( "Starting Ethernet test\n" );
 
	transmit_one_packet();
 
	printf( "Ending Ethernet test\n" );
 
	exit( 0 );
}