/*
------------------------------------------------------------------------
$Id$
------------------------------------------------------------------------
My Right Boot, a boot ROM for embedded hardware.
Copyright Cybertec Pty Ltd, 2000
All rights reserved Cybertec Pty Ltd, 2000
COPYRIGHT (c) 1989-1998.
On-Line Applications Research Corporation (OAR).
Copyright assigned to U.S. Government, 1994.
The license and distribution terms for this file may be
found in the file LICENSE in this distribution or at
http://www.OARcorp.com/rtems/license.html.
------------------------------------------------------------------------
CS8900 net boot driver.
*/
#include <bspIo.h>
#include <rtems.h>
#include <libchip/cs8900.h>
/*
* Our local data.
*/
#ifdef CS8900_VERBOSE
static BOOLEAN cs8900_io_verbose;
#endif
static rtems_isr_void_entry old_handler[CS8900_DEVICES];
static void *old_parameter[CS8900_DEVICES];
/*
* Tables of IO addresses and interrupt levels for each device attached.
*/
static const unsigned long ethernet_io_base[CS8900_DEVICES] =
{
ETHERNET_BASE
};
static const unsigned long ethernet_mem_base[CS8900_DEVICES] =
{
ETHERNET_BASE + CS8900_MEMORY_BASE
};
static const unsigned int ethernet_irq_level[CS8900_DEVICES] =
{
ETHERNET_IRQ_LEVEL
};
static const unsigned int ethernet_irq_priority[CS8900_DEVICES] =
{
ETHERNET_IRQ_PRIORITY
};
static const unsigned int ethernet_irq_vector[CS8900_DEVICES] =
{
ETHERNET_IRQ_VECTOR,
};
void cs8900_io_set_reg (int dev, unsigned short reg, unsigned short data)
{
#ifdef CS8900_DATA_BUS_SWAPPED
data = (data >> 8) | (data << 8);
#endif
#ifdef CS8900_VERBOSE
if (cs8900_io_verbose)
printf ("CS8900: io set reg=0x%04x, data=0x%04x\n", reg, data);
#endif
WRITE_REGISTER_16 (ethernet_io_base[dev] + reg, data);
}
unsigned short cs8900_io_get_reg (int dev, unsigned short reg)
{
unsigned long data;
READ_REGISTER_16 (ethernet_io_base[dev] + reg, data);
#ifdef CS8900_DATA_BUS_SWAPPED
data = (data >> 8) | (data << 8);
#endif
#ifdef CS8900_VERBOSE
if (cs8900_io_verbose)
printk ("CS8900: io get reg=0x%04x, data=0x%04x\n", reg, data);
#endif
return data;
}
void cs8900_mem_set_reg (int dev, unsigned long reg, unsigned short data)
{
#ifdef CS8900_DATA_BUS_SWAPPED
data = (data >> 8) | (data << 8);
#endif
#ifdef CS8900_VERBOSE
if (cs8900_io_verbose)
printk ("CS8900: mem set reg=0x%04x, data=0x%04x\n", reg, data);
#endif
WRITE_REGISTER_16 (ethernet_io_base[dev] + reg, data);
}
unsigned short cs8900_mem_get_reg (int dev, unsigned long reg)
{
unsigned short data;
READ_REGISTER_16 (ethernet_io_base[dev] + reg, data);
#ifdef CS8900_DATA_BUS_SWAPPED
data = (data >> 8) | (data << 8);
#endif
#ifdef CS8900_VERBOSE
if (cs8900_io_verbose)
printk ("CS8900: mem get reg=0x%04x, data=0x%04x\n", reg, data);
#endif
return data;
}
void cs8900_put_data_block (int dev, int len, unsigned char *data)
{
#ifndef CS8900_DATA_BUS_SWAPPED
unsigned short swap_word;
#endif
unsigned short *src = (unsigned short *) ((unsigned long) data);
unsigned short *dst = (unsigned short *) (ethernet_mem_base[dev] + CS8900_PP_TxFrameLoc);
while (len > 1)
{
#ifndef CS8900_DATA_BUS_SWAPPED
swap_word = *src++;
*dst++ = (swap_word >> 8) | (swap_word << 8);
#else
*dst++ = *src++;
#endif
len -= 2;
}
if (len)
{
#ifndef CS8900_DATA_BUS_SWAPPED
swap_word = *src++;
*dst++ = (swap_word >> 8) | (swap_word << 8);
#else
*dst++ = *src++;
#endif
}
}
unsigned short cs8900_get_data_block (int dev, unsigned char *data)
{
unsigned short swap_word;
volatile unsigned short *src = (unsigned short *) (ethernet_mem_base[dev] + CS8900_PP_RxLength);
unsigned short *dst;
unsigned short len;
unsigned short rx_len;
unsigned short len_odd;
#ifdef CS8900_DATA_BUS_SWAPPED
swap_word = *src++;
len = (swap_word >> 8) | (swap_word << 8);
#else
len = *src++;
#endif
dst = (unsigned short *) ((unsigned long) data);
len_odd = len & 1;
rx_len = len & ~1;
for (; rx_len; rx_len -= 2)
{
#ifndef CS8900_DATA_BUS_SWAPPED
swap_word = *src++;
*dst++ = (swap_word >> 8) | (swap_word << 8);
#else
*dst++ = *src++;
#endif
}
if (len_odd)
{
#ifndef CS8900_DATA_BUS_SWAPPED
swap_word = *src++;
*dst++ = (swap_word >> 8) | (swap_word << 8);
#else
*dst++ = *src++;
#endif
}
return len;
}
void
cs8900_tx_load (int dev, struct mbuf *m)
{
volatile unsigned short *dst = (unsigned short *) (ethernet_mem_base[dev] + CS8900_PP_TxFrameLoc);
unsigned int len;
unsigned char *src;
int remainder = 0;
unsigned char remainder_data = '\0';
while (m)
{
/*
* We can get empty mbufs from the stack.
*/
len = m->m_len;
src = mtod (m, unsigned char*);
if (len)
{
if (remainder)
{
#ifndef CS8900_DATA_BUS_SWAPPED
*dst++ = remainder_data | (*src++ << 8);
#else
*dst++ = *src++ | (remainder_data << 8);
#endif
len--;
remainder = 0;
}
if (len & 1)
{
remainder = 1;
len--;
}
for (; len; len -= 2)
#ifndef CS8900_DATA_BUS_SWAPPED
*dst++ = (*src++) | (*(++src) << 8);
#else
*dst++ = (*src++ << 8) | *(++src);
#endif
if (remainder)
remainder_data = *src++;
}
m = m->m_next;
}
if (remainder)
{
#ifndef CS8900_DATA_BUS_SWAPPED
*dst = (unsigned short) remainder_data;
#else
*dst = (unsigned short) (remainder_data << 8);
#endif
}
}
void cs8900_attach_interrupt (int dev, cs8900_device *cs)
{
rtems_interrupt_catch_with_void (cs8900_interrupt,
ethernet_irq_vector[dev],
&old_handler[dev],
cs,
&old_parameter[dev]);
CF_SIM_WRITE_ICR (CF_BASE,
ethernet_irq_level[dev],
CF_SIM_ICR_AVEC_AUTO,
ethernet_irq_level[dev],
ethernet_irq_priority[dev]);
CF_SIM_IMR_ENABLE (CF_BASE, 1 << ethernet_irq_level[dev]);
}
void cs8900_detach_interrupt (int dev)
{
CF_SIM_IMR_DISABLE (CF_BASE, 1 << ethernet_irq_level[dev]);
rtems_interrupt_catch_with_void (old_handler,
ethernet_irq_vector[dev],
NULL,
old_parameter[dev],
NULL);
}
void cs8900_get_mac_addr (int dev, unsigned char *mac_address)
{
memcpy (mac_address, rct_get_mac_address (dev), 6);
}