247 lines
7.3 KiB
C
247 lines
7.3 KiB
C
/*-
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* TODO:
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* [1] integrate into current if_ed.c
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* [2] parse tuples to find out where to map the shared memory buffer,
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* and what to write into the configuration register
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* [3] move pcic-specific code into a separate module.
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*
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* Device driver for IBM PCMCIA Credit Card Adapter for Ethernet,
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* if_ze.c
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*
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* Based on the Device driver for National Semiconductor DS8390 ethernet
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* adapters by David Greenman. Modifications for PCMCIA by Keith Moore.
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* Adapted for FreeBSD 1.1.5 by Jordan Hubbard.
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*
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* Currently supports only the IBM Credit Card Adapter for Ethernet, but
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* could probably work with other PCMCIA cards also, if it were modified
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* to get the locations of the PCMCIA configuration option register (COR)
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* by parsing the configuration tuples, rather than by hard-coding in
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* the value expected by IBM's card.
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*
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* Sources for data on the PCMCIA/IBM CCAE specific portions of the driver:
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*
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* [1] _Local Area Network Credit Card Adapters Technical Reference_,
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* IBM Corp., SC30-3585-00, part # 33G9243.
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* [2] "pre-alpha" PCMCIA support code for Linux by Barry Jaspan.
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* [3] Intel 82536SL PC Card Interface Controller Data Sheet, Intel
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* Order Number 290423-002
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* [4] National Semiconductor DP83902A ST-NIC (tm) Serial Network
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* Interface Controller for Twisted Pair data sheet.
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*
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*
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* Copyright (C) 1993, David Greenman. This software may be used, modified,
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* copied, distributed, and sold, in both source and binary form provided
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* that the above copyright and these terms are retained. Under no
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* circumstances is the author responsible for the proper functioning
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* of this software, nor does the author assume any responsibility
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* for damages incurred with its use.
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*/
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#include <sys/param.h>
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#if defined(__FreeBSD__)
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <machine/clock.h>
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#endif
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#include <i386/isa/isa.h>
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#include <i386/isa/isa_device.h>
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#include <i386/isa/icu.h>
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#include <i386/isa/pcic.h>
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void
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pcic_print_regs (int slot)
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{
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int i, j;
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for (i = 0; i < 0x40; i += 16) {
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for (j = 0; j < 16; ++j)
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printf ("%02x ", pcic_getb (slot, i + j));
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printf ("\n");
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}
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}
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/*
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* map a portion of the card's memory space into system memory
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* space.
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*
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* slot = # of the slot the card is plugged into
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* window = which pcic memory map registers to use (0..4)
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* sys_addr = base system PHYSICAL memory address where we want it. must
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* be on an appropriate boundary (lower 12 bits are zero).
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* card_addr = the base address of the card's memory to correspond
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* to sys_addr
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* length = length of the segment to map (may be rounded up as necessary)
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* type = which card memory space to map (attribute or shared)
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* width = 1 for byte-wide mapping; 2 for word (16-bit) mapping.
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*/
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void
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pcic_map_memory (int slot, int window, unsigned long sys_addr,
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unsigned long card_addr, unsigned long length,
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enum memtype type, int width)
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{
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unsigned short offset;
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unsigned short mem_start_addr;
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unsigned short mem_stop_addr;
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sys_addr >>= 12;
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card_addr >>= 12;
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length >>= 12;
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/*
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* compute an offset for the chip such that
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* (sys_addr + offset) = card_addr
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* but the arithmetic is done modulo 2^14
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*/
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offset = (card_addr - sys_addr) & 0x3FFF;
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/*
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* now OR in the bit for "attribute memory" if necessary
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*/
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if (type == ATTRIBUTE) {
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offset |= (PCIC_REG << 8);
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/* REG == "region active" pin on card */
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}
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/*
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* okay, set up the chip memory mapping registers, and turn
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* on the enable bit for this window.
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* if we are doing 16-bit wide accesses (width == 2),
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* turn on the appropriate bit.
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*
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* XXX for now, we set all of the wait state bits to zero.
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* Not really sure how they should be set.
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*/
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mem_start_addr = sys_addr & 0xFFF;
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if (width == 2)
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mem_start_addr |= (PCIC_DATA16 << 8);
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mem_stop_addr = (sys_addr + length) & 0xFFF;
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pcic_putw (slot, MEM_START_ADDR(window), mem_start_addr);
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pcic_putw (slot, MEM_STOP_ADDR(window), mem_stop_addr);
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pcic_putw (slot, MEM_OFFSET(window), offset);
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/*
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* Assert the bit (PCIC_MEMCS16) that says to decode all of
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* the address lines.
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*/
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pcic_putb (slot, PCIC_ADDRWINE,
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pcic_getb (slot, PCIC_ADDRWINE) |
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MEM_ENABLE_BIT(window) | PCIC_MEMCS16);
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}
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void
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pcic_unmap_memory (int slot, int window)
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{
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/*
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* seems like we need to turn off the enable bit first, after which
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* we can clear the registers out just to be sure.
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*/
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pcic_putb (slot, PCIC_ADDRWINE,
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pcic_getb (slot, PCIC_ADDRWINE) & ~MEM_ENABLE_BIT(window));
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pcic_putw (slot, MEM_START_ADDR(window), 0);
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pcic_putw (slot, MEM_STOP_ADDR(window), 0);
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pcic_putw (slot, MEM_OFFSET(window), 0);
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}
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/*
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* map a range of addresses into system i/o space
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* (no translation of i/o addresses is possible)
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*
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* 'width' is:
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* + 0 to tell the PCIC to generate the ISA IOCS16* signal from
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* the PCMCIA IOIS16* signal.
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* + 1 to select 8-bit width
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* + 2 to select 16-bit width
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*/
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void
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pcic_map_io (int slot, int window, unsigned short base, unsigned short length,
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unsigned short width)
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{
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unsigned char x;
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pcic_putw (slot, IO_START_ADDR(window), base);
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pcic_putw (slot, IO_STOP_ADDR(window), base+length-1);
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/*
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* select the bits that determine whether
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* an i/o operation is 8 or 16 bits wide
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*/
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x = pcic_getb (slot, PCIC_IOCTL);
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switch (width) {
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case 0: /* PCMCIA card decides */
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if (window)
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x = (x & 0xf0) | PCIC_IO1_CS16;
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else
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x = (x & 0x0f) | PCIC_IO0_CS16;
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break;
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case 1: /* 8 bits wide */
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break;
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case 2: /* 16 bits wide */
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if (window)
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x = (x & 0xf0) | PCIC_IO1_16BIT;
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else
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x = (x & 0x0f) | PCIC_IO0_16BIT;
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break;
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}
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pcic_putb (slot, PCIC_IOCTL, x);
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pcic_putb (slot, PCIC_ADDRWINE,
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pcic_getb (slot, PCIC_ADDRWINE) | IO_ENABLE_BIT(window));
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}
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#ifdef TEST
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void
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pcic_unmap_io (int slot, int window)
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{
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pcic_putb (slot, PCIC_ADDRWINE,
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pcic_getb (slot, PCIC_ADDRWINE) & ~IO_ENABLE_BIT(window));
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pcic_putw (slot, IO_START_ADDR(window), 0);
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pcic_putw (slot, IO_STOP_ADDR(window), 0);
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}
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#endif /* TEST */
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/*
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* tell the PCIC which irq we want to use. only the following are legal:
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* 3, 4, 5, 7, 9, 10, 11, 12, 14, 15
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*
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* NB: 'irq' is an interrupt NUMBER, not a MASK as in struct isa_device.
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*/
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void
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pcic_map_irq (int slot, int irq)
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{
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if (irq < 3 || irq == 6 || irq == 8 || irq == 13 || irq > 15) {
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printf ("zp: pcic_map_irq (slot %d): illegal irq %d\n", slot, irq);
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return;
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}
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pcic_putb (slot, PCIC_INT_GEN,
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pcic_getb (slot, PCIC_INT_GEN) | (irq & 0x0F));
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}
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void
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pcic_power_on (int slot)
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{
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pcic_putb (slot, PCIC_STATUS,
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pcic_getb (slot, PCIC_STATUS) | PCIC_POW);
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DELAY (100000);
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pcic_putb (slot, PCIC_POWER,
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pcic_getb (slot, PCIC_POWER) | PCIC_DISRST | PCIC_PCPWRE);
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DELAY (100000);
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pcic_putb (slot, PCIC_POWER,
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pcic_getb (slot, PCIC_POWER) | PCIC_OUTENA);
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}
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void
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pcic_power_off (int slot)
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{
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pcic_putb (slot, PCIC_POWER,
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pcic_getb (slot, PCIC_POWER) & ~(PCIC_OUTENA|PCIC_PCPWRE));
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}
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void
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pcic_reset (int slot)
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{
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/* assert RESET (by clearing a bit!), wait a bit, and de-assert it */
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pcic_putb (slot, PCIC_INT_GEN,
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pcic_getb (slot, PCIC_INT_GEN) & ~PCIC_CARDRESET);
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DELAY (100000);
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pcic_putb (slot, PCIC_INT_GEN,
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pcic_getb (slot, PCIC_INT_GEN) | PCIC_CARDRESET);
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}
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