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minix/drivers/dp8390/3c503.c
Ben Gras 1d8aed840c . no more HZ, but use sys_hz() to get that value 
. memory maps in physical memory (for /dev/mem) with new vm interface
 . pci complete_bars() seems to be buggy behaviour sometimes
 . startup script opens its own stdout, stderr and stdin so init doesn't
   have to do it
2008-12-11 14:42:23 +00:00

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/*
* 3c503.c A shared memory driver for Etherlink II board.
*
* Created: Dec. 20, 1996 by G. Falzoni <falzoni@marina.scn.de>
*
* Inspired by the TNET package by M. Ostrowski, the driver for Linux
* by D. Becker, the Crynwr 3c503 packet driver, and the Amoeba driver.
*
* It works in shared memory mode and should be used with the
* device driver for NS 8390 based cards of Minix. Programmed
* I/O could be used as well but would result in poor performance.
*/
#include "../drivers.h"
#include <net/gen/ether.h>
#include <net/gen/eth_io.h>
#include "local.h"
#include "dp8390.h"
#include "3c503.h"
#if ENABLE_3C503
extern u32_t system_hz;
#define MILLIS_TO_TICKS(m) (((m)*system_hz/1000)+1)
_PROTOTYPE(static void el2_init, (dpeth_t *dep));
_PROTOTYPE(static void el2_stop, (dpeth_t *dep));
_PROTOTYPE( static void milli_delay, (unsigned long millis) );
/*===========================================================================*
* el2_init *
*===========================================================================*/
static void el2_init(dep)
dpeth_t * dep;
{
/* Initalize hardware and data structures. */
int ix, irq;
int sendq_nr;
int cntr;
/* Map the address PROM to lower I/O address range */
cntr = inb_el2(dep, EL2_CNTR);
outb_el2(dep, EL2_CNTR, cntr | ECNTR_SAPROM);
/* Read station address from PROM */
for (ix = EL2_EA0; ix <= EL2_EA5; ix += 1)
dep->de_address.ea_addr[ix] = inb_el2(dep, ix);
/* Map the 8390 back to lower I/O address range */
outb_el2(dep, EL2_CNTR, cntr);
/* Enable memory, but turn off interrupts until we are ready */
outb_el2(dep, EL2_CFGR, ECFGR_IRQOFF);
dep->de_data_port = dep->de_dp8390_port = dep->de_base_port;
dep->de_prog_IO = 0; /* Programmed I/O not yet available */
/* Check width of data bus:
* 1. Write 0 to WTS bit. The board will drive it to 1 if it is a
* 16-bit card.
* 2. Select page 2
* 3. See if it is a 16-bit card
* 4. Select page 0
*/
outb_el2(dep, DP_CR, CR_PS_P0|CR_DM_ABORT|CR_STP);
outb_el2(dep, DP_DCR, 0);
outb_el2(dep, DP_CR, CR_PS_P2|CR_DM_ABORT|CR_STP);
dep->de_16bit = (inb_el2(dep, DP_DCR) & DCR_WTS) != 0;
outb_el2(dep, DP_CR, CR_PS_P0|CR_DM_ABORT|CR_STP);
/* Allocate one send buffer (1.5KB) per 8KB of on board memory. */
sendq_nr = (dep->de_ramsize - dep->de_offset_page) / 0x2000;
if (sendq_nr < 1)
sendq_nr = 1;
else if (sendq_nr > SENDQ_NR)
sendq_nr = SENDQ_NR;
dep->de_sendq_nr = sendq_nr;
for (ix = 0; ix < sendq_nr; ix++)
dep->de_sendq[ix].sq_sendpage = (ix * SENDQ_PAGES) + EL2_SM_START_PG;
dep->de_startpage = (ix * SENDQ_PAGES) + EL2_SM_START_PG;
dep->de_stoppage = EL2_SM_STOP_PG;
outb_el2(dep, EL2_STARTPG, dep->de_startpage);
outb_el2(dep, EL2_STOPPG, dep->de_stoppage);
/* Point the vector pointer registers somewhere ?harmless?. */
outb_el2(dep, EL2_VP2, 0xFF); /* Point at the ROM restart location */
outb_el2(dep, EL2_VP1, 0xFF); /* 0xFFFF:0000 (from original sources) */
outb_el2(dep, EL2_VP0, 0x00); /* - What for protected mode? */
/* Set interrupt level for 3c503 */
irq = (dep->de_irq &= ~DEI_DEFAULT); /* Strip the default flag. */
if (irq == 9) irq = 2;
if (irq < 2 || irq > 5) panic("", "bad 3c503 irq configuration", irq);
outb_el2(dep, EL2_IDCFG, (0x04 << irq));
outb_el2(dep, EL2_DRQCNT, 0x08); /* Set burst size to 8 */
outb_el2(dep, EL2_DMAAH, EL2_SM_START_PG); /* Put start of TX */
outb_el2(dep, EL2_DMAAL, 0x00); /* buffer in the GA DMA reg */
outb_el2(dep, EL2_CFGR, ECFGR_NORM); /* Enable shared memory */
if (!debug) {
printf("%s: 3c503 at %X:%d:%lX\n",
dep->de_name, dep->de_base_port, dep->de_irq,
dep->de_linmem + dep->de_offset_page);
} else {
printf("%s: 3Com Etherlink II %sat I/O address 0x%X, "
"memory address 0x%lX, irq %d\n",
dep->de_name, dep->de_16bit ? "(16-bit) " : "",
dep->de_base_port,
dep->de_linmem + dep->de_offset_page,
dep->de_irq);
}
}
/*===========================================================================*
* el2_stop *
*===========================================================================*/
static void el2_stop(dep)
dpeth_t * dep;
{
/* Stops board by disabling interrupts. */
#if DEBUG
printf("%s: stopping Etherlink\n", dep->de_name);
#endif
outb_el2(dep, EL2_CFGR, ECFGR_IRQOFF);
return;
}
/*===========================================================================*
* el2_probe *
*===========================================================================*/
int el2_probe(dep)
dpeth_t * dep;
{
/* Probe for the presence of an EtherLink II card. Initialize memory
* addressing if card detected.
*/
int iobase, membase;
int thin;
/* Thin ethernet or AUI? */
thin = (dep->de_linmem & 1) ? ECNTR_AUI : ECNTR_THIN;
/* Location registers should have 1 bit set */
if (!(iobase = inb_el2(dep, EL2_IOBASE))) return 0;
if (!((membase = inb_el2(dep, EL2_MEMBASE)) & 0xF0)) return 0;
if ((iobase & (iobase - 1)) || (membase & (membase - 1))) return 0;
/* Resets board */
outb_el2(dep, EL2_CNTR, ECNTR_RESET | thin);
milli_delay(1);
outb_el2(dep, EL2_CNTR, thin);
milli_delay(5);
/* Map the address PROM to lower I/O address range */
outb_el2(dep, EL2_CNTR, ECNTR_SAPROM | thin);
if (inb_el2(dep, EL2_EA0) != 0x02 || /* Etherlink II Station address */
inb_el2(dep, EL2_EA1) != 0x60 || /* MUST be 02:60:8c:xx:xx:xx */
inb_el2(dep, EL2_EA2) != 0x8C)
return 0; /* No Etherlink board at this address */
/* Map the 8390 back to lower I/O address range */
outb_el2(dep, EL2_CNTR, thin);
/* Setup shared memory addressing for 3c503 */
dep->de_linmem = ((membase & 0xC0) ? EL2_BASE_0D8000 : EL2_BASE_0C8000) +
((membase & 0xA0) ? (EL2_BASE_0CC000 - EL2_BASE_0C8000) : 0x0000);
dep->de_offset_page = (EL2_SM_START_PG * DP_PAGESIZE);
dep->de_ramsize = (EL2_SM_STOP_PG - EL2_SM_START_PG) * DP_PAGESIZE;
/* (Bad kludge, something Philip needs to look into. -- kjb) */
dep->de_linmem -= dep->de_offset_page;
dep->de_ramsize += dep->de_offset_page;
/* Board initialization and stop functions */
dep->de_initf = el2_init;
dep->de_stopf = el2_stop;
return 1;
}
static void milli_delay(unsigned long millis)
{
tickdelay(MILLIS_TO_TICKS(millis));
}
#endif /* ENABLE_3C503 */
/** 3c503.c **/
/*
* $PchId: 3c503.c,v 1.3 2003/09/10 15:33:04 philip Exp $
*/
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