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/*-
* TODO:
* [1] integrate into current if_ed.c
* [2] parse tuples to find out where to map the shared memory buffer,
* and what to write into the configuration register
* [3] move pcic-specific code into a separate module.
*
* Device driver for IBM PCMCIA Credit Card Adapter for Ethernet,
* if_ze.c
*
* Based on the Device driver for National Semiconductor DS8390 ethernet
* adapters by David Greenman. Modifications for PCMCIA by Keith Moore.
* Adapted for FreeBSD 1.1.5 by Jordan Hubbard.
*
* Currently supports only the IBM Credit Card Adapter for Ethernet, but
* could probably work with other PCMCIA cards also, if it were modified
* to get the locations of the PCMCIA configuration option register (COR)
* by parsing the configuration tuples, rather than by hard-coding in
* the value expected by IBM's card.
*
* Sources for data on the PCMCIA/IBM CCAE specific portions of the driver:
*
* [1] _Local Area Network Credit Card Adapters Technical Reference_,
* IBM Corp., SC30-3585-00, part # 33G9243.
* [2] "pre-alpha" PCMCIA support code for Linux by Barry Jaspan.
* [3] Intel 82536SL PC Card Interface Controller Data Sheet, Intel
* Order Number 290423-002
* [4] National Semiconductor DP83902A ST-NIC (tm) Serial Network
* Interface Controller for Twisted Pair data sheet.
*
*
* Copyright (C) 1993, David Greenman. This software may be used, modified,
* copied, distributed, and sold, in both source and binary form provided
* that the above copyright and these terms are retained. Under no
* circumstances is the author responsible for the proper functioning
* of this software, nor does the author assume any responsibility
* for damages incurred with its use.
*/
#include <sys/param.h>
#if defined(__FreeBSD__)
#include <sys/systm.h>
#include <machine/clock.h>
#endif
#include <i386/isa/isa_device.h>
#include <i386/isa/pcic.h>
/*
* map a portion of the card's memory space into system memory
* space.
*
* slot = # of the slot the card is plugged into
* window = which pcic memory map registers to use (0..4)
* sys_addr = base system PHYSICAL memory address where we want it. must
* be on an appropriate boundary (lower 12 bits are zero).
* card_addr = the base address of the card's memory to correspond
* to sys_addr
* length = length of the segment to map (may be rounded up as necessary)
* type = which card memory space to map (attribute or shared)
* width = 1 for byte-wide mapping; 2 for word (16-bit) mapping.
*/
void
pcic_map_memory (int slot, int window, unsigned long sys_addr,
unsigned long card_addr, unsigned long length,
enum memtype type, int width)
{
unsigned short offset;
unsigned short mem_start_addr;
unsigned short mem_stop_addr;
sys_addr >>= 12;
card_addr >>= 12;
length >>= 12;
/*
* compute an offset for the chip such that
* (sys_addr + offset) = card_addr
* but the arithmetic is done modulo 2^14
*/
offset = (card_addr - sys_addr) & 0x3FFF;
/*
* now OR in the bit for "attribute memory" if necessary
*/
if (type == ATTRIBUTE) {
offset |= (PCIC_REG << 8);
/* REG == "region active" pin on card */
}
/*
* okay, set up the chip memory mapping registers, and turn
* on the enable bit for this window.
* if we are doing 16-bit wide accesses (width == 2),
* turn on the appropriate bit.
*
* XXX for now, we set all of the wait state bits to zero.
* Not really sure how they should be set.
*/
mem_start_addr = sys_addr & 0xFFF;
if (width == 2)
mem_start_addr |= (PCIC_DATA16 << 8);
mem_stop_addr = (sys_addr + length) & 0xFFF;
pcic_putw (slot, MEM_START_ADDR(window), mem_start_addr);
pcic_putw (slot, MEM_STOP_ADDR(window), mem_stop_addr);
pcic_putw (slot, MEM_OFFSET(window), offset);
/*
* Assert the bit (PCIC_MEMCS16) that says to decode all of
* the address lines.
*/
pcic_putb (slot, PCIC_ADDRWINE,
pcic_getb (slot, PCIC_ADDRWINE) |
MEM_ENABLE_BIT(window) | PCIC_MEMCS16);
}
void
pcic_unmap_memory (int slot, int window)
{
/*
* seems like we need to turn off the enable bit first, after which
* we can clear the registers out just to be sure.
*/
pcic_putb (slot, PCIC_ADDRWINE,
pcic_getb (slot, PCIC_ADDRWINE) & ~MEM_ENABLE_BIT(window));
pcic_putw (slot, MEM_START_ADDR(window), 0);
pcic_putw (slot, MEM_STOP_ADDR(window), 0);
pcic_putw (slot, MEM_OFFSET(window), 0);
}
/*
* map a range of addresses into system i/o space
* (no translation of i/o addresses is possible)
*
* 'width' is:
* + 0 to tell the PCIC to generate the ISA IOCS16* signal from
* the PCMCIA IOIS16* signal.
* + 1 to select 8-bit width
* + 2 to select 16-bit width
*/
void
pcic_map_io (int slot, int window, unsigned short base, unsigned short length,
unsigned short width)
{
unsigned char x;
pcic_putw (slot, IO_START_ADDR(window), base);
pcic_putw (slot, IO_STOP_ADDR(window), base+length-1);
/*
* select the bits that determine whether
* an i/o operation is 8 or 16 bits wide
*/
x = pcic_getb (slot, PCIC_IOCTL);
switch (width) {
case 0: /* PCMCIA card decides */
if (window)
x = (x & 0xf0) | PCIC_IO1_CS16;
else
x = (x & 0x0f) | PCIC_IO0_CS16;
break;
case 1: /* 8 bits wide */
break;
case 2: /* 16 bits wide */
if (window)
x = (x & 0xf0) | PCIC_IO1_16BIT;
else
x = (x & 0x0f) | PCIC_IO0_16BIT;
break;
}
pcic_putb (slot, PCIC_IOCTL, x);
pcic_putb (slot, PCIC_ADDRWINE,
pcic_getb (slot, PCIC_ADDRWINE) | IO_ENABLE_BIT(window));
}
#ifdef TEST
void
pcic_unmap_io (int slot, int window)
{
pcic_putb (slot, PCIC_ADDRWINE,
pcic_getb (slot, PCIC_ADDRWINE) & ~IO_ENABLE_BIT(window));
pcic_putw (slot, IO_START_ADDR(window), 0);
pcic_putw (slot, IO_STOP_ADDR(window), 0);
}
#endif /* TEST */
/*
* tell the PCIC which irq we want to use. only the following are legal:
* 3, 4, 5, 7, 9, 10, 11, 12, 14, 15
*
* NB: 'irq' is an interrupt NUMBER, not a MASK as in struct isa_device.
*/
void
pcic_map_irq (int slot, int irq)
{
if (irq < 3 || irq == 6 || irq == 8 || irq == 13 || irq > 15) {
printf ("zp: pcic_map_irq (slot %d): illegal irq %d\n", slot, irq);
return;
}
pcic_putb (slot, PCIC_INT_GEN,
pcic_getb (slot, PCIC_INT_GEN) | (irq & 0x0F));
}
void
pcic_power_on (int slot)
{
pcic_putb (slot, PCIC_STATUS,
pcic_getb (slot, PCIC_STATUS) | PCIC_POW);
DELAY (100000);
pcic_putb (slot, PCIC_POWER,
pcic_getb (slot, PCIC_POWER) | PCIC_DISRST | PCIC_PCPWRE);
DELAY (100000);
pcic_putb (slot, PCIC_POWER,
pcic_getb (slot, PCIC_POWER) | PCIC_OUTENA);
}
void
pcic_power_off (int slot)
{
pcic_putb (slot, PCIC_POWER,
pcic_getb (slot, PCIC_POWER) & ~(PCIC_OUTENA|PCIC_PCPWRE));
}
void
pcic_reset (int slot)
{
/* assert RESET (by clearing a bit!), wait a bit, and de-assert it */
pcic_putb (slot, PCIC_INT_GEN,
pcic_getb (slot, PCIC_INT_GEN) & ~PCIC_CARDRESET);
DELAY (100000);
pcic_putb (slot, PCIC_INT_GEN,
pcic_getb (slot, PCIC_INT_GEN) | PCIC_CARDRESET);
}
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