d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
5c40906f11
freebsd-dev/sys/isa/ppc.c
Nicolas Souchu 20240fa3ad Distinguish EPP address/data register. Add EPP address register access to ppi. 
Change microseq offsets. Previously, offsets of the program counter where
added to the index of the current microinstruction. Make them rely on the
index of the next executed microinstruction.

Suggested by: Luigi Rizzo <luigi@labinfo.iet.unipi.it>
1999-01-30 15:35:39 +00:00

1793 lines
40 KiB
C
Raw Blame History

/*-
* Copyright (c) 1997, 1998 Nicolas Souchu
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: ppc.c,v 1.15 1999/01/10 16:41:13 nsouch Exp $
*
*/
#include "ppc.h"
#if NPPC > 0
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <machine/clock.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <i386/isa/isa_device.h>
#include <dev/ppbus/ppbconf.h>
#include <dev/ppbus/ppb_msq.h>
#include <i386/isa/ppcreg.h>
#include "opt_ppc.h"
#define LOG_PPC(function, ppc, string) \
if (bootverbose) printf("%s: %s\n", function, string)
static int ppcprobe(struct isa_device *);
static int ppcattach(struct isa_device *);
struct isa_driver ppcdriver = {
ppcprobe, ppcattach, "ppc"
};
static struct ppc_data *ppcdata[NPPC];
static int nppc = 0;
static char *ppc_types[] = {
"SMC-like", "SMC FDC37C665GT", "SMC FDC37C666GT", "PC87332", "PC87306",
"82091AA", "Generic", "W83877F", "W83877AF", "Winbond", "PC87334", 0
};
/* list of available modes */
static char *ppc_avms[] = {
"COMPATIBLE", "NIBBLE-only", "PS2-only", "PS2/NIBBLE", "EPP-only",
"EPP/NIBBLE", "EPP/PS2", "EPP/PS2/NIBBLE", "ECP-only",
"ECP/NIBBLE", "ECP/PS2", "ECP/PS2/NIBBLE", "ECP/EPP",
"ECP/EPP/NIBBLE", "ECP/EPP/PS2", "ECP/EPP/PS2/NIBBLE", 0
};
/* list of current executing modes
* Note that few modes do not actually exist.
*/
static char *ppc_modes[] = {
"COMPATIBLE", "NIBBLE", "PS/2", "PS/2", "EPP",
"EPP", "EPP", "EPP", "ECP",
"ECP", "ECP+PS2", "ECP+PS2", "ECP+EPP",
"ECP+EPP", "ECP+EPP", "ECP+EPP", 0
};
static char *ppc_epp_protocol[] = { " (EPP 1.9)", " (EPP 1.7)", 0 };
/*
* BIOS printer list - used by BIOS probe.
*/
#define BIOS_PPC_PORTS 0x408
#define BIOS_PORTS (short *)(KERNBASE+BIOS_PPC_PORTS)
#define BIOS_MAX_PPC 4
/*
* All these functions are default actions for IN/OUT operations.
* They may be redefined if needed.
*/
static void ppc_outsb_epp(int unit, char *addr, int cnt) {
outsb(ppcdata[unit]->ppc_base + PPC_EPP_DATA, addr, cnt); }
static void ppc_outsw_epp(int unit, char *addr, int cnt) {
outsw(ppcdata[unit]->ppc_base + PPC_EPP_DATA, addr, cnt); }
static void ppc_outsl_epp(int unit, char *addr, int cnt) {
outsl(ppcdata[unit]->ppc_base + PPC_EPP_DATA, addr, cnt); }
static void ppc_insb_epp(int unit, char *addr, int cnt) {
insb(ppcdata[unit]->ppc_base + PPC_EPP_DATA, addr, cnt); }
static void ppc_insw_epp(int unit, char *addr, int cnt) {
insw(ppcdata[unit]->ppc_base + PPC_EPP_DATA, addr, cnt); }
static void ppc_insl_epp(int unit, char *addr, int cnt) {
insl(ppcdata[unit]->ppc_base + PPC_EPP_DATA, addr, cnt); }
static u_char ppc_rdtr(int unit) { return r_dtr(ppcdata[unit]); }
static u_char ppc_rstr(int unit) { return r_str(ppcdata[unit]); }
static u_char ppc_rctr(int unit) { return r_ctr(ppcdata[unit]); }
static u_char ppc_repp_A(int unit) { return r_epp_A(ppcdata[unit]); }
static u_char ppc_repp_D(int unit) { return r_epp_D(ppcdata[unit]); }
static u_char ppc_recr(int unit) { return r_ecr(ppcdata[unit]); }
static u_char ppc_rfifo(int unit) { return r_fifo(ppcdata[unit]); }
static void ppc_wdtr(int unit, char byte) { w_dtr(ppcdata[unit], byte); }
static void ppc_wstr(int unit, char byte) { w_str(ppcdata[unit], byte); }
static void ppc_wctr(int unit, char byte) { w_ctr(ppcdata[unit], byte); }
static void ppc_wepp_A(int unit, char byte) { w_epp_A(ppcdata[unit], byte); }
static void ppc_wepp_D(int unit, char byte) { w_epp_D(ppcdata[unit], byte); }
static void ppc_wecr(int unit, char byte) { w_ecr(ppcdata[unit], byte); }
static void ppc_wfifo(int unit, char byte) { w_fifo(ppcdata[unit], byte); }
static void ppc_reset_epp_timeout(int);
static void ppc_ecp_sync(int);
static ointhand2_t ppcintr;
static int ppc_exec_microseq(int, struct ppb_microseq **);
static int ppc_generic_setmode(int, int);
static int ppc_smclike_setmode(int, int);
static int ppc_read(int, char *, int, int);
static int ppc_write(int, char *, int, int);
static struct ppb_adapter ppc_smclike_adapter = {
0, /* no intr handler, filled by chipset dependent code */
ppc_reset_epp_timeout, ppc_ecp_sync,
ppc_exec_microseq,
ppc_smclike_setmode, ppc_read, ppc_write,
ppc_outsb_epp, ppc_outsw_epp, ppc_outsl_epp,
ppc_insb_epp, ppc_insw_epp, ppc_insl_epp,
ppc_rdtr, ppc_rstr, ppc_rctr, ppc_repp_A, ppc_repp_D, ppc_recr, ppc_rfifo,
ppc_wdtr, ppc_wstr, ppc_wctr, ppc_wepp_A, ppc_wepp_D, ppc_wecr, ppc_wfifo
};
static struct ppb_adapter ppc_generic_adapter = {
0, /* no intr handler, filled by chipset dependent code */
ppc_reset_epp_timeout, ppc_ecp_sync,
ppc_exec_microseq,
ppc_generic_setmode, ppc_read, ppc_write,
ppc_outsb_epp, ppc_outsw_epp, ppc_outsl_epp,
ppc_insb_epp, ppc_insw_epp, ppc_insl_epp,
ppc_rdtr, ppc_rstr, ppc_rctr, ppc_repp_A, ppc_repp_D, ppc_recr, ppc_rfifo,
ppc_wdtr, ppc_wstr, ppc_wctr, ppc_wepp_A, ppc_wepp_D, ppc_wecr, ppc_wfifo
};
/*
* ppc_ecp_sync() XXX
*/
static void
ppc_ecp_sync(int unit) {
struct ppc_data *ppc = ppcdata[unit];
int i, r;
if (!(ppc->ppc_avm & PPB_ECP))
return;
r = r_ecr(ppc);
if ((r & 0xe0) != PPC_ECR_EPP)
return;
for (i = 0; i < 100; i++) {
r = r_ecr(ppc);
if (r & 0x1)
return;
DELAY(100);
}
printf("ppc%d: ECP sync failed as data still " \
"present in FIFO.\n", unit);
return;
}
/*
* ppc_detect_fifo()
*
* Detect parallel port FIFO
*/
static int
ppc_detect_fifo(struct ppc_data *ppc)
{
char ecr_sav;
char ctr_sav, ctr, cc;
short i;
/* save registers */
ecr_sav = r_ecr(ppc);
ctr_sav = r_ctr(ppc);
/* enter ECP configuration mode, no interrupt, no DMA */
w_ecr(ppc, 0xf4);
/* read PWord size - transfers in FIFO mode must be PWord aligned */
ppc->ppc_pword = (r_cnfgA(ppc) & PPC_PWORD_MASK);
/* XXX 16 and 32 bits implementations not supported */
if (ppc->ppc_pword != PPC_PWORD_8) {
LOG_PPC(__FUNCTION__, ppc, "PWord not supported");
goto error;
}
w_ecr(ppc, 0x34); /* byte mode, no interrupt, no DMA */
ctr = r_ctr(ppc);
w_ctr(ppc, ctr | PCD); /* set direction to 1 */
/* enter ECP test mode, no interrupt, no DMA */
w_ecr(ppc, 0xd4);
/* flush the FIFO */
for (i=0; i<1024; i++) {
if (r_ecr(ppc) & PPC_FIFO_EMPTY)
break;
cc = r_fifo(ppc);
}
if (i >= 1024) {
LOG_PPC(__FUNCTION__, ppc, "can't flush FIFO");
goto error;
}
/* enable interrupts, no DMA */
w_ecr(ppc, 0xd0);
/* determine readIntrThreshold
* fill the FIFO until serviceIntr is set
*/
for (i=0; i<1024; i++) {
w_fifo(ppc, (char)i);
if (!ppc->ppc_rthr && (r_ecr(ppc) & PPC_SERVICE_INTR)) {
/* readThreshold reached */
ppc->ppc_rthr = i+1;
}
if (r_ecr(ppc) & PPC_FIFO_FULL) {
ppc->ppc_fifo = i+1;
break;
}
}
if (i >= 1024) {
LOG_PPC(__FUNCTION__, ppc, "can't fill FIFO");
goto error;
}
w_ecr(ppc, 0xd4); /* test mode, no interrupt, no DMA */
w_ctr(ppc, ctr & ~PCD); /* set direction to 0 */
w_ecr(ppc, 0xd0); /* enable interrupts */
/* determine writeIntrThreshold
* empty the FIFO until serviceIntr is set
*/
for (i=ppc->ppc_fifo; i>0; i--) {
if (r_fifo(ppc) != (char)(ppc->ppc_fifo-i)) {
LOG_PPC(__FUNCTION__, ppc, "invalid data in FIFO");
goto error;
}
if (r_ecr(ppc) & PPC_SERVICE_INTR) {
/* writeIntrThreshold reached */
ppc->ppc_wthr = ppc->ppc_fifo - i+1;
}
/* if FIFO empty before the last byte, error */
if (i>1 && (r_ecr(ppc) & PPC_FIFO_EMPTY)) {
LOG_PPC(__FUNCTION__, ppc, "data lost in FIFO");
goto error;
}
}
/* FIFO must be empty after the last byte */
if (!(r_ecr(ppc) & PPC_FIFO_EMPTY)) {
LOG_PPC(__FUNCTION__, ppc, "can't empty the FIFO");
goto error;
}
w_ctr(ppc, ctr_sav);
w_ecr(ppc, ecr_sav);
return (0);
error:
w_ctr(ppc, ctr_sav);
w_ecr(ppc, ecr_sav);
return (EINVAL);
}
static int
ppc_detect_port(struct ppc_data *ppc)
{
w_ctr(ppc, 0x0c); /* To avoid missing PS2 ports */
w_dtr(ppc, 0xaa);
if (r_dtr(ppc) != 0xaa)
return (0);
return (1);
}
/*
* ppc_pc873xx_detect
*
* Probe for a Natsemi PC873xx-family part.
*
* References in this function are to the National Semiconductor
* PC87332 datasheet TL/C/11930, May 1995 revision.
*/
static int pc873xx_basetab[] = {0x0398, 0x026e, 0x015c, 0x002e, 0};
static int pc873xx_porttab[] = {0x0378, 0x03bc, 0x0278, 0};
static int pc873xx_irqtab[] = {5, 7, 5, 0};
static int pc873xx_regstab[] = {
PC873_FER, PC873_FAR, PC873_PTR,
PC873_FCR, PC873_PCR, PC873_PMC,
PC873_TUP, PC873_SID, PC873_PNP0,
PC873_PNP1, PC873_LPTBA, -1
};
static char *pc873xx_rnametab[] = {
"FER", "FAR", "PTR", "FCR", "PCR",
"PMC", "TUP", "SID", "PNP0", "PNP1",
"LPTBA", NULL
};
static int
ppc_pc873xx_detect(struct ppc_data *ppc, int chipset_mode) /* XXX mode never forced */
{
static int index = 0;
int idport, irq;
int ptr, pcr, val, i;
while ((idport = pc873xx_basetab[index++])) {
/* XXX should check first to see if this location is already claimed */
/*
* Pull the 873xx through the power-on ID cycle (2.2,1.).
* We can't use this to locate the chip as it may already have
* been used by the BIOS.
*/
(void)inb(idport); (void)inb(idport);
(void)inb(idport); (void)inb(idport);
/*
* Read the SID byte. Possible values are :
*
* 01010xxx PC87334
* 0001xxxx PC87332
* 01110xxx PC87306
*/
outb(idport, PC873_SID);
val = inb(idport + 1);
if ((val & 0xf0) == 0x10) {
ppc->ppc_type = NS_PC87332;
} else if ((val & 0xf8) == 0x70) {
ppc->ppc_type = NS_PC87306;
} else if ((val & 0xf8) == 0x50) {
ppc->ppc_type = NS_PC87334;
} else {
if (bootverbose && (val != 0xff))
printf("PC873xx probe at 0x%x got unknown ID 0x%x\n", idport, val);
continue ; /* not recognised */
}
/* print registers */
if (bootverbose) {
printf("PC873xx");
for (i=0; pc873xx_regstab[i] != -1; i++) {
outb(idport, pc873xx_regstab[i]);
printf(" %s=0x%x", pc873xx_rnametab[i],
inb(idport + 1) & 0xff);
}
printf("\n");
}
/*
* We think we have one. Is it enabled and where we want it to be?
*/
outb(idport, PC873_FER);
val = inb(idport + 1);
if (!(val & PC873_PPENABLE)) {
if (bootverbose)
printf("PC873xx parallel port disabled\n");
continue;
}
outb(idport, PC873_FAR);
val = inb(idport + 1) & 0x3;
/* XXX we should create a driver instance for every port found */
if (pc873xx_porttab[val] != ppc->ppc_base) {
if (bootverbose)
printf("PC873xx at 0x%x not for driver at port 0x%x\n",
pc873xx_porttab[val], ppc->ppc_base);
continue;
}
outb(idport, PC873_PTR);
ptr = inb(idport + 1);
/* get irq settings */
if (ppc->ppc_base == 0x378)
irq = (ptr & PC873_LPTBIRQ7) ? 7 : 5;
else
irq = pc873xx_irqtab[val];
if (bootverbose)
printf("PC873xx irq %d at 0x%x\n", irq, ppc->ppc_base);
/*
* Check if irq settings are correct
*/
if (irq != ppc->ppc_irq) {
/*
* If the chipset is not locked and base address is 0x378,
* we have another chance
*/
if (ppc->ppc_base == 0x378 && !(ptr & PC873_CFGLOCK)) {
if (ppc->ppc_irq == 7) {
outb(idport + 1, (ptr | PC873_LPTBIRQ7));
outb(idport + 1, (ptr | PC873_LPTBIRQ7));
} else {
outb(idport + 1, (ptr & ~PC873_LPTBIRQ7));
outb(idport + 1, (ptr & ~PC873_LPTBIRQ7));
}
if (bootverbose)
printf("PC873xx irq set to %d\n", ppc->ppc_irq);
} else {
if (bootverbose)
printf("PC873xx sorry, can't change irq setting\n");
}
} else {
if (bootverbose)
printf("PC873xx irq settings are correct\n");
}
outb(idport, PC873_PCR);
pcr = inb(idport + 1);
if ((ptr & PC873_CFGLOCK) || !chipset_mode) {
if (bootverbose)
printf("PC873xx %s", (ptr & PC873_CFGLOCK)?"locked":"unlocked");
ppc->ppc_avm |= PPB_NIBBLE;
if (bootverbose)
printf(", NIBBLE");
if (pcr & PC873_EPPEN) {
ppc->ppc_avm |= PPB_EPP;
if (bootverbose)
printf(", EPP");
if (pcr & PC873_EPP19)
ppc->ppc_epp = EPP_1_9;
else
ppc->ppc_epp = EPP_1_7;
if ((ppc->ppc_type == NS_PC87332) && bootverbose) {
outb(idport, PC873_PTR);
ptr = inb(idport + 1);
if (ptr & PC873_EPPRDIR)
printf(", Regular mode");
else
printf(", Automatic mode");
}
} else if (pcr & PC873_ECPEN) {
ppc->ppc_avm |= PPB_ECP;
if (bootverbose)
printf(", ECP");
if (pcr & PC873_ECPCLK) { /* XXX */
ppc->ppc_avm |= PPB_PS2;
if (bootverbose)
printf(", PS/2");
}
} else {
outb(idport, PC873_PTR);
ptr = inb(idport + 1);
if (ptr & PC873_EXTENDED) {
ppc->ppc_avm |= PPB_SPP;
if (bootverbose)
printf(", SPP");
}
}
} else {
if (bootverbose)
printf("PC873xx unlocked");
if (chipset_mode & PPB_ECP) {
if ((chipset_mode & PPB_EPP) && bootverbose)
printf(", ECP+EPP not supported");
pcr &= ~PC873_EPPEN;
pcr |= (PC873_ECPEN | PC873_ECPCLK); /* XXX */
outb(idport + 1, pcr);
outb(idport + 1, pcr);
if (bootverbose)
printf(", ECP");
} else if (chipset_mode & PPB_EPP) {
pcr &= ~(PC873_ECPEN | PC873_ECPCLK);
pcr |= (PC873_EPPEN | PC873_EPP19);
outb(idport + 1, pcr);
outb(idport + 1, pcr);
ppc->ppc_epp = EPP_1_9; /* XXX */
if (bootverbose)
printf(", EPP1.9");
/* enable automatic direction turnover */
if (ppc->ppc_type == NS_PC87332) {
outb(idport, PC873_PTR);
ptr = inb(idport + 1);
ptr &= ~PC873_EPPRDIR;
outb(idport + 1, ptr);
outb(idport + 1, ptr);
if (bootverbose)
printf(", Automatic mode");
}
} else {
pcr &= ~(PC873_ECPEN | PC873_ECPCLK | PC873_EPPEN);
outb(idport + 1, pcr);
outb(idport + 1, pcr);
/* configure extended bit in PTR */
outb(idport, PC873_PTR);
ptr = inb(idport + 1);
if (chipset_mode & PPB_PS2) {
ptr |= PC873_EXTENDED;
if (bootverbose)
printf(", PS/2");
} else {
/* default to NIBBLE mode */
ptr &= ~PC873_EXTENDED;
if (bootverbose)
printf(", NIBBLE");
}
outb(idport + 1, ptr);
outb(idport + 1, ptr);
}
ppc->ppc_avm = chipset_mode;
}
if (bootverbose)
printf("\n");
ppc->ppc_link.adapter = &ppc_generic_adapter;
ppc_generic_setmode(ppc->ppc_unit, chipset_mode);
return(chipset_mode);
}
return(-1);
}
static int
ppc_check_epp_timeout(struct ppc_data *ppc)
{
ppc_reset_epp_timeout(ppc->ppc_unit);
return (!(r_str(ppc) & TIMEOUT));
}
/*
* ppc_smc37c66xgt_detect
*
* SMC FDC37C66xGT configuration.
*/
static int
ppc_smc37c66xgt_detect(struct ppc_data *ppc, int chipset_mode)
{
int s, i;
char r;
int type = -1;
int csr = SMC66x_CSR; /* initial value is 0x3F0 */
int port_address[] = { -1 /* disabled */ , 0x3bc, 0x378, 0x278 };
#define cio csr+1 /* config IO port is either 0x3F1 or 0x371 */
/*
* Detection: enter configuration mode and read CRD register.
*/
s = splhigh();
outb(csr, SMC665_iCODE);
outb(csr, SMC665_iCODE);
splx(s);
outb(csr, 0xd);
if (inb(cio) == 0x65) {
type = SMC_37C665GT;
goto config;
}
for (i = 0; i < 2; i++) {
s = splhigh();
outb(csr, SMC666_iCODE);
outb(csr, SMC666_iCODE);
splx(s);
outb(csr, 0xd);
if (inb(cio) == 0x66) {
type = SMC_37C666GT;
break;
}
/* Another chance, CSR may be hard-configured to be at 0x370 */
csr = SMC666_CSR;
}
config:
/*
* If chipset not found, do not continue.
*/
if (type == -1)
return (-1);
/* select CR1 */
outb(csr, 0x1);
/* read the port's address: bits 0 and 1 of CR1 */
r = inb(cio) & SMC_CR1_ADDR;
if (port_address[r] != ppc->ppc_base)
return (-1);
ppc->ppc_type = type;
/*
* CR1 and CR4 registers bits 3 and 0/1 for mode configuration
* If SPP mode is detected, try to set ECP+EPP mode
*/
if (bootverbose) {
outb(csr, 0x1);
printf("ppc%d: SMC registers CR1=0x%x", ppc->ppc_unit,
inb(cio) & 0xff);
outb(csr, 0x4);
printf(" CR4=0x%x", inb(cio) & 0xff);
}
/* select CR1 */
outb(csr, 0x1);
if (!chipset_mode) {
/* autodetect mode */
/* 666GT is ~certainly~ hardwired to an extended ECP+EPP mode */
if (type == SMC_37C666GT) {
ppc->ppc_avm |= PPB_ECP | PPB_EPP | PPB_SPP;
if (bootverbose)
printf(" configuration hardwired, supposing " \
"ECP+EPP SPP");
} else
if ((inb(cio) & SMC_CR1_MODE) == 0) {
/* already in extended parallel port mode, read CR4 */
outb(csr, 0x4);
r = (inb(cio) & SMC_CR4_EMODE);
switch (r) {
case SMC_SPP:
ppc->ppc_avm |= PPB_SPP;
if (bootverbose)
printf(" SPP");
break;
case SMC_EPPSPP:
ppc->ppc_avm |= PPB_EPP | PPB_SPP;
if (bootverbose)
printf(" EPP SPP");
break;
case SMC_ECP:
ppc->ppc_avm |= PPB_ECP | PPB_SPP;
if (bootverbose)
printf(" ECP SPP");
break;
case SMC_ECPEPP:
ppc->ppc_avm |= PPB_ECP | PPB_EPP | PPB_SPP;
if (bootverbose)
printf(" ECP+EPP SPP");
break;
}
} else {
/* not an extended port mode */
ppc->ppc_avm |= PPB_SPP;
if (bootverbose)
printf(" SPP");
}
} else {
/* mode forced */
ppc->ppc_avm = chipset_mode;
/* 666GT is ~certainly~ hardwired to an extended ECP+EPP mode */
if (type == SMC_37C666GT)
goto end_detect;
r = inb(cio);
if ((chipset_mode & (PPB_ECP | PPB_EPP)) == 0) {
/* do not use ECP when the mode is not forced to */
outb(cio, r | SMC_CR1_MODE);
if (bootverbose)
printf(" SPP");
} else {
/* an extended mode is selected */
outb(cio, r & ~SMC_CR1_MODE);
/* read CR4 register and reset mode field */
outb(csr, 0x4);
r = inb(cio) & ~SMC_CR4_EMODE;
if (chipset_mode & PPB_ECP) {
if (chipset_mode & PPB_EPP) {
outb(cio, r | SMC_ECPEPP);
if (bootverbose)
printf(" ECP+EPP");
} else {
outb(cio, r | SMC_ECP);
if (bootverbose)
printf(" ECP");
}
} else {
/* PPB_EPP is set */
outb(cio, r | SMC_EPPSPP);
if (bootverbose)
printf(" EPP SPP");
}
}
ppc->ppc_avm = chipset_mode;
}
/* set FIFO threshold to 16 */
if (ppc->ppc_avm & PPB_ECP) {
/* select CRA */
outb(csr, 0xa);
outb(cio, 16);
}
end_detect:
if (bootverbose)
printf ("\n");
if (ppc->ppc_avm & PPB_EPP) {
/* select CR4 */
outb(csr, 0x4);
r = inb(cio);
/*
* Set the EPP protocol...
* Low=EPP 1.9 (1284 standard) and High=EPP 1.7
*/
if (ppc->ppc_epp == EPP_1_9)
outb(cio, (r & ~SMC_CR4_EPPTYPE));
else
outb(cio, (r | SMC_CR4_EPPTYPE));
}
/* end config mode */
outb(csr, 0xaa);
ppc->ppc_link.adapter = &ppc_smclike_adapter;
ppc_smclike_setmode(ppc->ppc_unit, chipset_mode);
return (chipset_mode);
}
/*
* Winbond W83877F stuff
*
* EFER: extended function enable register
* EFIR: extended function index register
* EFDR: extended function data register
*/
#define efir ((efer == 0x250) ? 0x251 : 0x3f0)
#define efdr ((efer == 0x250) ? 0x252 : 0x3f1)
static int w83877f_efers[] = { 0x250, 0x3f0, 0x3f0, 0x250 };
static int w83877f_keys[] = { 0x89, 0x86, 0x87, 0x88 };
static int w83877f_keyiter[] = { 1, 2, 2, 1 };
static int w83877f_hefs[] = { WINB_HEFERE, WINB_HEFRAS, WINB_HEFERE | WINB_HEFRAS, 0 };
static int
ppc_w83877f_detect(struct ppc_data *ppc, int chipset_mode)
{
int i, j, efer;
unsigned char r, hefere, hefras;
for (i = 0; i < 4; i ++) {
/* first try to enable configuration registers */
efer = w83877f_efers[i];
/* write the key to the EFER */
for (j = 0; j < w83877f_keyiter[i]; j ++)
outb (efer, w83877f_keys[i]);
/* then check HEFERE and HEFRAS bits */
outb (efir, 0x0c);
hefere = inb(efdr) & WINB_HEFERE;
outb (efir, 0x16);
hefras = inb(efdr) & WINB_HEFRAS;
/*
* HEFRAS HEFERE
* 0 1 write 89h to 250h (power-on default)
* 1 0 write 86h twice to 3f0h
* 1 1 write 87h twice to 3f0h
* 0 0 write 88h to 250h
*/
if ((hefere | hefras) == w83877f_hefs[i])
goto found;
}
return (-1); /* failed */
found:
/* check base port address - read from CR23 */
outb(efir, 0x23);
if (ppc->ppc_base != inb(efdr) * 4) /* 4 bytes boundaries */
return (-1);
/* read CHIP ID from CR9/bits0-3 */
outb(efir, 0x9);
switch (inb(efdr) & WINB_CHIPID) {
case WINB_W83877F_ID:
ppc->ppc_type = WINB_W83877F;
break;
case WINB_W83877AF_ID:
ppc->ppc_type = WINB_W83877AF;
break;
default:
ppc->ppc_type = WINB_UNKNOWN;
}
if (bootverbose) {
/* dump of registers */
printf("ppc%d: 0x%x - ", ppc->ppc_unit, w83877f_keys[i]);
for (i = 0; i <= 0xd; i ++) {
outb(efir, i);
printf("0x%x ", inb(efdr));
}
for (i = 0x10; i <= 0x17; i ++) {
outb(efir, i);
printf("0x%x ", inb(efdr));
}
outb(efir, 0x1e);
printf("0x%x ", inb(efdr));
for (i = 0x20; i <= 0x29; i ++) {
outb(efir, i);
printf("0x%x ", inb(efdr));
}
printf("\n");
printf("ppc%d:", ppc->ppc_unit);
}
ppc->ppc_link.adapter = &ppc_generic_adapter;
if (!chipset_mode) {
/* autodetect mode */
/* select CR0 */
outb(efir, 0x0);
r = inb(efdr) & (WINB_PRTMODS0 | WINB_PRTMODS1);
/* select CR9 */
outb(efir, 0x9);
r |= (inb(efdr) & WINB_PRTMODS2);
switch (r) {
case WINB_W83757:
if (bootverbose)
printf("ppc%d: W83757 compatible mode\n",
ppc->ppc_unit);
return (-1); /* generic or SMC-like */
case WINB_EXTFDC:
case WINB_EXTADP:
case WINB_EXT2FDD:
case WINB_JOYSTICK:
if (bootverbose)
printf(" not in parallel port mode\n");
return (-1);
case (WINB_PARALLEL | WINB_EPP_SPP):
ppc->ppc_avm |= PPB_EPP | PPB_SPP;
if (bootverbose)
printf(" EPP SPP");
break;
case (WINB_PARALLEL | WINB_ECP):
ppc->ppc_avm |= PPB_ECP | PPB_SPP;
if (bootverbose)
printf(" ECP SPP");
break;
case (WINB_PARALLEL | WINB_ECP_EPP):
ppc->ppc_avm |= PPB_ECP | PPB_EPP | PPB_SPP;
ppc->ppc_link.adapter = &ppc_smclike_adapter;
if (bootverbose)
printf(" ECP+EPP SPP");
break;
default:
printf("%s: unknown case (0x%x)!\n", __FUNCTION__, r);
}
} else {
/* mode forced */
/* select CR9 and set PRTMODS2 bit */
outb(efir, 0x9);
outb(efdr, inb(efdr) & ~WINB_PRTMODS2);
/* select CR0 and reset PRTMODSx bits */
outb(efir, 0x0);
outb(efdr, inb(efdr) & ~(WINB_PRTMODS0 | WINB_PRTMODS1));
if (chipset_mode & PPB_ECP) {
if (chipset_mode & PPB_EPP) {
outb(efdr, inb(efdr) | WINB_ECP_EPP);
if (bootverbose)
printf(" ECP+EPP");
ppc->ppc_link.adapter = &ppc_smclike_adapter;
} else {
outb(efdr, inb(efdr) | WINB_ECP);
if (bootverbose)
printf(" ECP");
}
} else {
/* select EPP_SPP otherwise */
outb(efdr, inb(efdr) | WINB_EPP_SPP);
if (bootverbose)
printf(" EPP SPP");
}
ppc->ppc_avm = chipset_mode;
}
if (bootverbose)
printf("\n");
/* exit configuration mode */
outb(efer, 0xaa);
ppc->ppc_link.adapter->setmode(ppc->ppc_unit, chipset_mode);
return (chipset_mode);
}
/*
* ppc_generic_detect
*/
static int
ppc_generic_detect(struct ppc_data *ppc, int chipset_mode)
{
/* default to generic */
ppc->ppc_link.adapter = &ppc_generic_adapter;
if (bootverbose)
printf("ppc%d:", ppc->ppc_unit);
if (!chipset_mode) {
/* first, check for ECP */
w_ecr(ppc, PPC_ECR_PS2);
if ((r_ecr(ppc) & 0xe0) == PPC_ECR_PS2) {
ppc->ppc_avm |= PPB_ECP | PPB_SPP;
if (bootverbose)
printf(" ECP SPP");
/* search for SMC style ECP+EPP mode */
w_ecr(ppc, PPC_ECR_EPP);
}
/* try to reset EPP timeout bit */
if (ppc_check_epp_timeout(ppc)) {
ppc->ppc_avm |= PPB_EPP;
if (ppc->ppc_avm & PPB_ECP) {
/* SMC like chipset found */
ppc->ppc_type = SMC_LIKE;
ppc->ppc_link.adapter = &ppc_smclike_adapter;
if (bootverbose)
printf(" ECP+EPP");
} else {
if (bootverbose)
printf(" EPP");
}
} else {
/* restore to standard mode */
w_ecr(ppc, PPC_ECR_STD);
}
/* XXX try to detect NIBBLE and PS2 modes */
ppc->ppc_avm |= PPB_NIBBLE;
if (bootverbose)
printf(" SPP");
} else {
ppc->ppc_avm = chipset_mode;
}
if (bootverbose)
printf("\n");
ppc->ppc_link.adapter->setmode(ppc->ppc_unit, chipset_mode);
return (chipset_mode);
}
/*
* ppc_detect()
*
* mode is the mode suggested at boot
*/
static int
ppc_detect(struct ppc_data *ppc, int chipset_mode) {
int i, mode;
/* list of supported chipsets */
int (*chipset_detect[])(struct ppc_data *, int) = {
ppc_pc873xx_detect,
ppc_smc37c66xgt_detect,
ppc_w83877f_detect,
ppc_generic_detect,
NULL
};
/* if can't find the port and mode not forced return error */
if (!ppc_detect_port(ppc) && chipset_mode == 0)
return (EIO); /* failed, port not present */
/* assume centronics compatible mode is supported */
ppc->ppc_avm = PPB_COMPATIBLE;
/* we have to differenciate available chipset modes,
* chipset running modes and IEEE-1284 operating modes
*
* after detection, the port must support running in compatible mode
*/
if (ppc->ppc_flags & 0x40) {
if (bootverbose)
printf("ppc: chipset forced to generic\n");
ppc->ppc_mode = ppc_generic_detect(ppc, chipset_mode);
} else {
for (i=0; chipset_detect[i] != NULL; i++) {
if ((mode = chipset_detect[i](ppc, chipset_mode)) != -1) {
ppc->ppc_mode = mode;
break;
}
}
}
/* configure/detect ECP FIFO */
if ((ppc->ppc_avm & PPB_ECP) && !(ppc->ppc_flags & 0x80))
ppc_detect_fifo(ppc);
return (0);
}
/*
* ppc_exec_microseq()
*
* Execute a microsequence.
* Microsequence mechanism is supposed to handle fast I/O operations.
*/
static int
ppc_exec_microseq(int unit, struct ppb_microseq **p_msq)
{
struct ppc_data *ppc = ppcdata[unit];
struct ppb_microseq *mi;
char cc, *p;
int i, iter, len;
int error;
register int reg;
register char mask;
register int accum = 0;
register char *ptr = 0;
struct ppb_microseq *stack = 0;
/* microsequence registers are equivalent to PC-like port registers */
#define r_reg(register,ppc) (inb((ppc)->ppc_base + register))
#define w_reg(register,ppc,byte) outb((ppc)->ppc_base + register, byte)
#define INCR_PC (mi ++) /* increment program counter */
mi = *p_msq;
for (;;) {
switch (mi->opcode) {
case MS_OP_RSET:
cc = r_reg(mi->arg[0].i, ppc);
cc &= (char)mi->arg[2].i; /* clear mask */
cc |= (char)mi->arg[1].i; /* assert mask */
w_reg(mi->arg[0].i, ppc, cc);
INCR_PC;
break;
case MS_OP_RASSERT_P:
reg = mi->arg[1].i;
ptr = ppc->ppc_ptr;
if ((len = mi->arg[0].i) == MS_ACCUM) {
accum = ppc->ppc_accum;
for (; accum; accum--)
w_reg(reg, ppc, *ptr++);
ppc->ppc_accum = accum;
} else
for (i=0; i<len; i++)
w_reg(reg, ppc, *ptr++);
ppc->ppc_ptr = ptr;
INCR_PC;
break;
case MS_OP_RFETCH_P:
reg = mi->arg[1].i;
mask = (char)mi->arg[2].i;
ptr = ppc->ppc_ptr;
if ((len = mi->arg[0].i) == MS_ACCUM) {
accum = ppc->ppc_accum;
for (; accum; accum--)
*ptr++ = r_reg(reg, ppc) & mask;
ppc->ppc_accum = accum;
} else
for (i=0; i<len; i++)
*ptr++ = r_reg(reg, ppc) & mask;
ppc->ppc_ptr = ptr;
INCR_PC;
break;
case MS_OP_RFETCH:
*((char *) mi->arg[2].p) = r_reg(mi->arg[0].i, ppc) &
(char)mi->arg[1].i;
INCR_PC;
break;
case MS_OP_RASSERT:
case MS_OP_DELAY:
/* let's suppose the next instr. is the same */
prefetch:
for (;mi->opcode == MS_OP_RASSERT; INCR_PC)
w_reg(mi->arg[0].i, ppc, (char)mi->arg[1].i);
if (mi->opcode == MS_OP_DELAY) {
DELAY(mi->arg[0].i);
INCR_PC;
goto prefetch;
}
break;
case MS_OP_ADELAY:
if (mi->arg[0].i)
tsleep(NULL, PPBPRI, "ppbdelay",
mi->arg[0].i * (hz/1000));
INCR_PC;
break;
case MS_OP_TRIG:
reg = mi->arg[0].i;
iter = mi->arg[1].i;
p = (char *)mi->arg[2].p;
/* XXX delay limited to 255 us */
for (i=0; i<iter; i++) {
w_reg(reg, ppc, *p++);
DELAY((unsigned char)*p++);
}
INCR_PC;
break;
case MS_OP_SET:
ppc->ppc_accum = mi->arg[0].i;
INCR_PC;
break;
case MS_OP_DBRA:
if (--ppc->ppc_accum > 0)
mi += mi->arg[0].i;
INCR_PC;
break;
case MS_OP_BRSET:
cc = r_str(ppc);
if ((cc & (char)mi->arg[0].i) == (char)mi->arg[0].i)
mi += mi->arg[1].i;
INCR_PC;
break;
case MS_OP_BRCLEAR:
cc = r_str(ppc);
if ((cc & (char)mi->arg[0].i) == 0)
mi += mi->arg[1].i;
INCR_PC;
break;
case MS_OP_BRSTAT:
cc = r_str(ppc);
if ((cc & ((char)mi->arg[0].i | (char)mi->arg[1].i)) ==
(char)mi->arg[0].i)
mi += mi->arg[2].i;
INCR_PC;
break;
case MS_OP_C_CALL:
/*
* If the C call returns !0 then end the microseq.
* The current state of ptr is passed to the C function
*/
if ((error = mi->arg[0].f(mi->arg[1].p, ppc->ppc_ptr)))
return (error);
INCR_PC;
break;
case MS_OP_PTR:
ppc->ppc_ptr = (char *)mi->arg[0].p;
INCR_PC;
break;
case MS_OP_CALL:
if (stack)
panic("%s: too much calls", __FUNCTION__);
if (mi->arg[0].p) {
/* store the state of the actual
* microsequence
*/
stack = mi;
/* jump to the new microsequence */
mi = (struct ppb_microseq *)mi->arg[0].p;
} else
INCR_PC;
break;
case MS_OP_SUBRET:
/* retrieve microseq and pc state before the call */
mi = stack;
/* reset the stack */
stack = 0;
/* XXX return code */
INCR_PC;
break;
case MS_OP_PUT:
case MS_OP_GET:
case MS_OP_RET:
/* can't return to ppb level during the execution
* of a submicrosequence */
if (stack)
panic("%s: can't return to ppb level",
__FUNCTION__);
/* update pc for ppb level of execution */
*p_msq = mi;
/* return to ppb level of execution */
return (0);
default:
panic("%s: unknown microsequence opcode 0x%x",
__FUNCTION__, mi->opcode);
}
}
/* unreached */
}
static void
ppcintr(int unit)
{
struct ppc_data *ppc = ppcdata[unit];
char ctr, ecr;
ctr = r_ctr(ppc);
ecr = r_ecr(ppc);
#ifdef PPC_DEBUG
printf("!");
#endif
/* don't use ecp mode with IRQENABLE set */
if (ctr & IRQENABLE) {
/* call upper code */
ppb_intr(&ppc->ppc_link);
return;
}
if (ctr & nFAULT) {
if (ppc->ppc_irqstat & PPC_IRQ_nFAULT) {
w_ecr(ppc, ecr | PPC_nFAULT_INTR);
ppc->ppc_irqstat &= ~PPC_IRQ_nFAULT;
} else {
/* call upper code */
ppb_intr(&ppc->ppc_link);
return;
}
}
if (ppc->ppc_irqstat & PPC_IRQ_DMA) {
/* disable interrupts (should be done by hardware though) */
w_ecr(ppc, ecr | PPC_SERVICE_INTR);
ppc->ppc_irqstat &= ~PPC_IRQ_DMA;
ecr = r_ecr(ppc);
/* check if DMA completed */
if ((ppc->ppc_avm & PPB_ECP) && (ecr & PPC_ENABLE_DMA)) {
#ifdef PPC_DEBUG
printf("a");
#endif
/* stop DMA */
w_ecr(ppc, ecr & ~PPC_ENABLE_DMA);
ecr = r_ecr(ppc);
if (ppc->ppc_dmastat == PPC_DMA_STARTED) {
#ifdef PPC_DEBUG
printf("d");
#endif
isa_dmadone(
ppc->ppc_dmaflags,
ppc->ppc_dmaddr,
ppc->ppc_dmacnt,
ppc->ppc_dmachan);
ppc->ppc_dmastat = PPC_DMA_COMPLETE;
/* wakeup the waiting process */
wakeup((caddr_t)ppc);
}
}
} else if (ppc->ppc_irqstat & PPC_IRQ_FIFO) {
/* classic interrupt I/O */
ppc->ppc_irqstat &= ~PPC_IRQ_FIFO;
}
return;
}
static int
ppc_read(int unit, char *buf, int len, int mode)
{
return (EINVAL);
}
/*
* Call this function if you want to send data in any advanced mode
* of your parallel port: FIFO, DMA
*
* If what you want is not possible (no ECP, no DMA...),
* EINVAL is returned
*/
static int
ppc_write(int unit, char *buf, int len, int how)
{
struct ppc_data *ppc = ppcdata[unit];
char ecr, ecr_sav, ctr, ctr_sav;
int s, error = 0;
int spin;
#ifdef PPC_DEBUG
printf("w");
#endif
ecr_sav = r_ecr(ppc);
ctr_sav = r_ctr(ppc);
/*
* Send buffer with DMA, FIFO and interrupts
*/
if (ppc->ppc_avm & PPB_ECP) {
if (ppc->ppc_dmachan >= 0) {
/* byte mode, no intr, no DMA, dir=0, flush fifo
*/
ecr = PPC_ECR_STD | PPC_DISABLE_INTR;
w_ecr(ppc, ecr);
/* disable nAck interrupts */
ctr = r_ctr(ppc);
ctr &= ~IRQENABLE;
w_ctr(ppc, ctr);
ppc->ppc_dmaflags = 0;
ppc->ppc_dmaddr = (caddr_t)buf;
ppc->ppc_dmacnt = (u_int)len;
switch (ppc->ppc_mode) {
case PPB_COMPATIBLE:
/* compatible mode with FIFO, no intr, DMA, dir=0 */
ecr = PPC_ECR_FIFO | PPC_DISABLE_INTR | PPC_ENABLE_DMA;
break;
case PPB_ECP:
ecr = PPC_ECR_ECP | PPC_DISABLE_INTR | PPC_ENABLE_DMA;
break;
default:
error = EINVAL;
goto error;
}
w_ecr(ppc, ecr);
ecr = r_ecr(ppc);
/* enter splhigh() not to be preempted
* by the dma interrupt, we may miss
* the wakeup otherwise
*/
s = splhigh();
ppc->ppc_dmastat = PPC_DMA_INIT;
/* enable interrupts */
ecr &= ~PPC_SERVICE_INTR;
ppc->ppc_irqstat = PPC_IRQ_DMA;
w_ecr(ppc, ecr);
isa_dmastart(
ppc->ppc_dmaflags,
ppc->ppc_dmaddr,
ppc->ppc_dmacnt,
ppc->ppc_dmachan);
#ifdef PPC_DEBUG
printf("s%d", ppc->ppc_dmacnt);
#endif
ppc->ppc_dmastat = PPC_DMA_STARTED;
/* Wait for the DMA completed interrupt. We hope we won't
* miss it, otherwise a signal will be necessary to unlock the
* process.
*/
do {
/* release CPU */
error = tsleep((caddr_t)ppc,
PPBPRI | PCATCH, "ppcdma", 0);
} while (error == EWOULDBLOCK);
splx(s);
if (error) {
#ifdef PPC_DEBUG
printf("i");
#endif
/* stop DMA */
isa_dmadone(
ppc->ppc_dmaflags, ppc->ppc_dmaddr,
ppc->ppc_dmacnt, ppc->ppc_dmachan);
/* no dma, no interrupt, flush the fifo */
w_ecr(ppc, PPC_ECR_RESET);
ppc->ppc_dmastat = PPC_DMA_INTERRUPTED;
goto error;
}
/* wait for an empty fifo */
while (!(r_ecr(ppc) & PPC_FIFO_EMPTY)) {
for (spin=100; spin; spin--)
if (r_ecr(ppc) & PPC_FIFO_EMPTY)
goto fifo_empty;
#ifdef PPC_DEBUG
printf("Z");
#endif
error = tsleep((caddr_t)ppc, PPBPRI | PCATCH, "ppcfifo", hz/100);
if (error != EWOULDBLOCK) {
#ifdef PPC_DEBUG
printf("I");
#endif
/* no dma, no interrupt, flush the fifo */
w_ecr(ppc, PPC_ECR_RESET);
ppc->ppc_dmastat = PPC_DMA_INTERRUPTED;
error = EINTR;
goto error;
}
}
fifo_empty:
/* no dma, no interrupt, flush the fifo */
w_ecr(ppc, PPC_ECR_RESET);
} else
error = EINVAL; /* XXX we should FIFO and
* interrupts */
} else
error = EINVAL;
error:
/* PDRQ must be kept unasserted until nPDACK is
* deasserted for a minimum of 350ns (SMC datasheet)
*
* Consequence may be a FIFO that never empty
*/
DELAY(1);
w_ecr(ppc, ecr_sav);
w_ctr(ppc, ctr_sav);
return (error);
}
/*
* Configure current operating mode
*/
static int
ppc_generic_setmode(int unit, int mode)
{
struct ppc_data *ppc = ppcdata[unit];
u_char ecr = 0;
/* check if mode is available */
if (mode && !(ppc->ppc_avm & mode))
return (EINVAL);
/* if ECP mode, configure ecr register */
if (ppc->ppc_avm & PPB_ECP) {
/* return to byte mode (keeping direction bit),
* no interrupt, no DMA to be able to change to
* ECP
*/
w_ecr(ppc, PPC_ECR_RESET);
ecr = PPC_DISABLE_INTR;
if (mode & PPB_EPP)
return (EINVAL);
else if (mode & PPB_ECP)
/* select ECP mode */
ecr |= PPC_ECR_ECP;
else if (mode & PPB_PS2)
/* select PS2 mode with ECP */
ecr |= PPC_ECR_PS2;
else
/* select COMPATIBLE/NIBBLE mode */
ecr |= PPC_ECR_STD;
w_ecr(ppc, ecr);
}
ppc->ppc_mode = mode;
return (0);
}
/*
* The ppc driver is free to choose options like FIFO or DMA
* if ECP mode is available.
*
* The 'RAW' option allows the upper drivers to force the ppc mode
* even with FIFO, DMA available.
*/
int
ppc_smclike_setmode(int unit, int mode)
{
struct ppc_data *ppc = ppcdata[unit];
u_char ecr = 0;
/* check if mode is available */
if (mode && !(ppc->ppc_avm & mode))
return (EINVAL);
/* if ECP mode, configure ecr register */
if (ppc->ppc_avm & PPB_ECP) {
/* return to byte mode (keeping direction bit),
* no interrupt, no DMA to be able to change to
* ECP or EPP mode
*/
w_ecr(ppc, PPC_ECR_RESET);
ecr = PPC_DISABLE_INTR;
if (mode & PPB_EPP)
/* select EPP mode */
ecr |= PPC_ECR_EPP;
else if (mode & PPB_ECP)
/* select ECP mode */
ecr |= PPC_ECR_ECP;
else if (mode & PPB_PS2)
/* select PS2 mode with ECP */
ecr |= PPC_ECR_PS2;
else
/* select COMPATIBLE/NIBBLE mode */
ecr |= PPC_ECR_STD;
w_ecr(ppc, ecr);
}
ppc->ppc_mode = mode;
return (0);
}
/*
* EPP timeout, according to the PC87332 manual
* Semantics of clearing EPP timeout bit.
* PC87332 - reading SPP_STR does it...
* SMC - write 1 to EPP timeout bit XXX
* Others - (?) write 0 to EPP timeout bit
*/
static void
ppc_reset_epp_timeout(int unit)
{
struct ppc_data *ppc = ppcdata[unit];
register char r;
r = r_str(ppc);
w_str(ppc, r | 0x1);
w_str(ppc, r & 0xfe);
return;
}
static int
ppcprobe(struct isa_device *dvp)
{
static short next_bios_ppc = 0;
struct ppc_data *ppc;
/*
* If port not specified, use bios list.
*/
if(dvp->id_iobase < 0) {
if((next_bios_ppc < BIOS_MAX_PPC) &&
(*(BIOS_PORTS+next_bios_ppc) != 0) ) {
dvp->id_iobase = *(BIOS_PORTS+next_bios_ppc++);
if (bootverbose)
printf("ppc: parallel port found at 0x%x\n",
dvp->id_iobase);
} else
return (0);
}
/*
* Port was explicitly specified.
* This allows probing of ports unknown to the BIOS.
*/
/*
* Allocate the ppc_data structure.
*/
ppc = malloc(sizeof(struct ppc_data), M_DEVBUF, M_NOWAIT);
if (!ppc) {
printf("ppc: cannot malloc!\n");
goto error;
}
bzero(ppc, sizeof(struct ppc_data));
ppc->ppc_base = dvp->id_iobase;
ppc->ppc_unit = dvp->id_unit;
ppc->ppc_type = GENERIC;
/* store boot flags */
ppc->ppc_flags = dvp->id_flags;
ppc->ppc_mode = PPB_COMPATIBLE;
ppc->ppc_epp = (dvp->id_flags & 0x10) >> 4;
/*
* XXX Try and detect if interrupts are working
*/
if (!(dvp->id_flags & 0x20))
ppc->ppc_irq = ffs(dvp->id_irq) - 1;
ppc->ppc_dmachan = dvp->id_drq;
ppcdata[ppc->ppc_unit] = ppc;
nppc ++;
/*
* Link the Parallel Port Chipset (adapter) to
* the future ppbus. Default to a generic chipset
*/
ppc->ppc_link.adapter_unit = ppc->ppc_unit;
ppc->ppc_link.adapter = &ppc_generic_adapter;
/*
* Try to detect the chipset and its mode.
*/
if (ppc_detect(ppc, dvp->id_flags & 0xf))
goto error;
return (1);
error:
return (0);
}
static int
ppcattach(struct isa_device *isdp)
{
struct ppc_data *ppc = ppcdata[isdp->id_unit];
struct ppb_data *ppbus;
printf("ppc%d: %s chipset (%s) in %s mode%s\n", ppc->ppc_unit,
ppc_types[ppc->ppc_type], ppc_avms[ppc->ppc_avm],
ppc_modes[ppc->ppc_mode], (PPB_IS_EPP(ppc->ppc_mode)) ?
ppc_epp_protocol[ppc->ppc_epp] : "");
if (ppc->ppc_fifo)
printf("ppc%d: FIFO with %d/%d/%d bytes threshold\n",
ppc->ppc_unit, ppc->ppc_fifo, ppc->ppc_wthr,
ppc->ppc_rthr);
isdp->id_ointr = ppcintr;
/*
* Prepare ppbus data area for upper level code.
*/
ppbus = ppb_alloc_bus();
if (!ppbus)
return (0);
ppc->ppc_link.ppbus = ppbus;
ppbus->ppb_link = &ppc->ppc_link;
if ((ppc->ppc_avm & PPB_ECP) && (ppc->ppc_dmachan > 0)) {
/* acquire the DMA channel forever */
isa_dma_acquire(ppc->ppc_dmachan);
isa_dmainit(ppc->ppc_dmachan, 1024); /* nlpt.BUFSIZE */
}
/*
* Probe the ppbus and attach devices found.
*/
ppb_attachdevs(ppbus);
return (1);
}
#endif
Reference in New Issue View Git Blame Copy Permalink