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/*
------------------------------------------------------------------------
$Id$
------------------------------------------------------------------------
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).
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 <rtems/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);
}
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