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freebsd/sys/isa/ppc.c
Nicolas Souchu c264e80fb7 Consider that the chipset may be in ECP mode (from BIOS settings) 
even if mode PS/2 is forced with bootflags. As a matter of fact,
chipsets needs some extra configuration for accessing PS/2 mode
from ECP. The current patch is only relevant for generic chipsets
since specific code is supposed to deal with this during detection.
2001-01-25 10:51:41 +00:00

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/*-
* Copyright (c) 2001 Alcove - 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.
*
* $FreeBSD$
*
*/
#include "opt_ppc.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/clock.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/vmparam.h>
#include <sys/rman.h>
#include <isa/isareg.h>
#include <isa/isavar.h>
#include <dev/ppbus/ppbconf.h>
#include <dev/ppbus/ppb_msq.h>
#include <isa/ppcreg.h>
#include "ppbus_if.h"
#define LOG_PPC(function, ppc, string) \
if (bootverbose) printf("%s: %s\n", function, string)
#define DEVTOSOFTC(dev) ((struct ppc_data *)device_get_softc(dev))
devclass_t ppc_devclass;
static int ppc_probe(device_t dev);
static int ppc_attach(device_t dev);
static int ppc_read_ivar(device_t bus, device_t dev, int index, uintptr_t *val);
static void ppc_reset_epp(device_t);
static void ppc_ecp_sync(device_t);
static void ppcintr(void *arg);
static int ppc_exec_microseq(device_t, struct ppb_microseq **);
static int ppc_setmode(device_t, int);
static int ppc_read(device_t, char *, int, int);
static int ppc_write(device_t, char *, int, int);
static u_char ppc_io(device_t, int, u_char *, int, u_char);
static int ppc_setup_intr(device_t, device_t, struct resource *, int,
void (*)(void *), void *, void **);
static int ppc_teardown_intr(device_t, device_t, struct resource *, void *);
static device_method_t ppc_methods[] = {
/* device interface */
DEVMETHOD(device_probe, ppc_probe),
DEVMETHOD(device_attach, ppc_attach),
/* bus interface */
DEVMETHOD(bus_read_ivar, ppc_read_ivar),
DEVMETHOD(bus_setup_intr, ppc_setup_intr),
DEVMETHOD(bus_teardown_intr, ppc_teardown_intr),
DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
/* ppbus interface */
DEVMETHOD(ppbus_io, ppc_io),
DEVMETHOD(ppbus_exec_microseq, ppc_exec_microseq),
DEVMETHOD(ppbus_reset_epp, ppc_reset_epp),
DEVMETHOD(ppbus_setmode, ppc_setmode),
DEVMETHOD(ppbus_ecp_sync, ppc_ecp_sync),
DEVMETHOD(ppbus_read, ppc_read),
DEVMETHOD(ppbus_write, ppc_write),
{ 0, 0 }
};
static driver_t ppc_driver = {
"ppc",
ppc_methods,
sizeof(struct ppc_data),
};
static char *ppc_models[] = {
"SMC-like", "SMC FDC37C665GT", "SMC FDC37C666GT", "PC87332", "PC87306",
"82091AA", "Generic", "W83877F", "W83877AF", "Winbond", "PC87334",
"SMC FDC37C935", "PC87303", 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 };
#ifdef __i386__
/*
* 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
#endif
/*
* ppc_ecp_sync() XXX
*/
static void
ppc_ecp_sync(device_t dev) {
int i, r;
struct ppc_data *ppc = DEVTOSOFTC(dev);
if (!(ppc->ppc_avm & PPB_ECP) && !(ppc->ppc_dtm & 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", ppc->ppc_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);
}
/*
* 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(struct ppc_data *ppc)
{
register char r;
r = r_str(ppc);
w_str(ppc, r | 0x1);
w_str(ppc, r & 0xfe);
return;
}
static int
ppc_check_epp_timeout(struct ppc_data *ppc)
{
ppc_reset_epp_timeout(ppc);
return (!(r_str(ppc) & TIMEOUT));
}
/*
* Configure current operating mode
*/
static int
ppc_generic_setmode(struct ppc_data *ppc, int mode)
{
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) || (ppc->ppc_dtm & 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.
*/
static int
ppc_smclike_setmode(struct ppc_data *ppc, int mode)
{
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) || (ppc->ppc_dtm & 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);
}
#ifdef PPC_PROBE_CHIPSET
/*
* 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
* 00110xxx PC87303
*/
outb(idport, PC873_SID);
val = inb(idport + 1);
if ((val & 0xf0) == 0x10) {
ppc->ppc_model = NS_PC87332;
} else if ((val & 0xf8) == 0x70) {
ppc->ppc_model = NS_PC87306;
} else if ((val & 0xf8) == 0x50) {
ppc->ppc_model = NS_PC87334;
} else if ((val & 0xf8) == 0x40) { /* Should be 0x30 by the
documentation, but probing
yielded 0x40... */
ppc->ppc_model = NS_PC87303;
} 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);
/* XXX we should create a driver instance for every port found */
if (pc873xx_porttab[val & 0x3] != ppc->ppc_base) {
/* First try to change the port address to that requested... */
switch(ppc->ppc_base) {
case 0x378:
val &= 0xfc;
break;
case 0x3bc:
val &= 0xfd;
break;
case 0x278:
val &= 0xfe;
break;
default:
val &= 0xfd;
break;
}
outb(idport, PC873_FAR);
outb(idport + 1, val);
outb(idport + 1, val);
/* Check for success by reading back the value we supposedly
wrote and comparing...*/
outb(idport, PC873_FAR);
val = inb(idport + 1) & 0x3;
/* If we fail, report the failure... */
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_model == 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_model == 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_type = PPC_TYPE_GENERIC;
ppc_generic_setmode(ppc, chipset_mode);
return(chipset_mode);
}
return(-1);
}
/*
* ppc_smc37c66xgt_detect
*
* SMC FDC37C66xGT configuration.
*/
static int
ppc_smc37c66xgt_detect(struct ppc_data *ppc, int chipset_mode)
{
int s, i;
u_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[(int)r] != ppc->ppc_base)
return (-1);
ppc->ppc_model = 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_type = PPC_TYPE_SMCLIKE;
ppc_smclike_setmode(ppc, chipset_mode);
return (chipset_mode);
}
/*
* SMC FDC37C935 configuration
* Found on many Alpha machines
*/
static int
ppc_smc37c935_detect(struct ppc_data *ppc, int chipset_mode)
{
int s;
int type = -1;
s = splhigh();
outb(SMC935_CFG, 0x55); /* enter config mode */
outb(SMC935_CFG, 0x55);
splx(s);
outb(SMC935_IND, SMC935_ID); /* check device id */
if (inb(SMC935_DAT) == 0x2)
type = SMC_37C935;
if (type == -1) {
outb(SMC935_CFG, 0xaa); /* exit config mode */
return (-1);
}
ppc->ppc_model = type;
outb(SMC935_IND, SMC935_LOGDEV); /* select parallel port, */
outb(SMC935_DAT, 3); /* which is logical device 3 */
/* set io port base */
outb(SMC935_IND, SMC935_PORTHI);
outb(SMC935_DAT, (u_char)((ppc->ppc_base & 0xff00) >> 8));
outb(SMC935_IND, SMC935_PORTLO);
outb(SMC935_DAT, (u_char)(ppc->ppc_base & 0xff));
if (!chipset_mode)
ppc->ppc_avm = PPB_COMPATIBLE; /* default mode */
else {
ppc->ppc_avm = chipset_mode;
outb(SMC935_IND, SMC935_PPMODE);
outb(SMC935_DAT, SMC935_CENT); /* start in compatible mode */
/* SPP + EPP or just plain SPP */
if (chipset_mode & (PPB_SPP)) {
if (chipset_mode & PPB_EPP) {
if (ppc->ppc_epp == EPP_1_9) {
outb(SMC935_IND, SMC935_PPMODE);
outb(SMC935_DAT, SMC935_EPP19SPP);
}
if (ppc->ppc_epp == EPP_1_7) {
outb(SMC935_IND, SMC935_PPMODE);
outb(SMC935_DAT, SMC935_EPP17SPP);
}
} else {
outb(SMC935_IND, SMC935_PPMODE);
outb(SMC935_DAT, SMC935_SPP);
}
}
/* ECP + EPP or just plain ECP */
if (chipset_mode & PPB_ECP) {
if (chipset_mode & PPB_EPP) {
if (ppc->ppc_epp == EPP_1_9) {
outb(SMC935_IND, SMC935_PPMODE);
outb(SMC935_DAT, SMC935_ECPEPP19);
}
if (ppc->ppc_epp == EPP_1_7) {
outb(SMC935_IND, SMC935_PPMODE);
outb(SMC935_DAT, SMC935_ECPEPP17);
}
} else {
outb(SMC935_IND, SMC935_PPMODE);
outb(SMC935_DAT, SMC935_ECP);
}
}
}
outb(SMC935_CFG, 0xaa); /* exit config mode */
ppc->ppc_type = PPC_TYPE_SMCLIKE;
ppc_smclike_setmode(ppc, 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_model = WINB_W83877F;
break;
case WINB_W83877AF_ID:
ppc->ppc_model = WINB_W83877AF;
break;
default:
ppc->ppc_model = 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_type = PPC_TYPE_GENERIC;
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_type = PPC_TYPE_SMCLIKE;
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_type = PPC_TYPE_SMCLIKE;
} 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);
switch (ppc->ppc_type) {
case PPC_TYPE_SMCLIKE:
ppc_smclike_setmode(ppc, chipset_mode);
break;
default:
ppc_generic_setmode(ppc, chipset_mode);
break;
}
return (chipset_mode);
}
#endif
/*
* ppc_generic_detect
*/
static int
ppc_generic_detect(struct ppc_data *ppc, int chipset_mode)
{
/* default to generic */
ppc->ppc_type = PPC_TYPE_GENERIC;
if (bootverbose)
printf("ppc%d:", ppc->ppc_unit);
/* first, check for ECP */
w_ecr(ppc, PPC_ECR_PS2);
if ((r_ecr(ppc) & 0xe0) == PPC_ECR_PS2) {
ppc->ppc_dtm |= 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_dtm |= PPB_EPP;
if (ppc->ppc_dtm & PPB_ECP) {
/* SMC like chipset found */
ppc->ppc_model = SMC_LIKE;
ppc->ppc_type = PPC_TYPE_SMCLIKE;
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_dtm |= PPB_NIBBLE;
if (bootverbose)
printf(" SPP");
if (chipset_mode)
ppc->ppc_avm = chipset_mode;
else
ppc->ppc_avm = ppc->ppc_dtm;
if (bootverbose)
printf("\n");
switch (ppc->ppc_type) {
case PPC_TYPE_SMCLIKE:
ppc_smclike_setmode(ppc, chipset_mode);
break;
default:
ppc_generic_setmode(ppc, chipset_mode);
break;
}
return (chipset_mode);
}
/*
* ppc_detect()
*
* mode is the mode suggested at boot
*/
static int
ppc_detect(struct ppc_data *ppc, int chipset_mode) {
#ifdef PPC_PROBE_CHIPSET
int i, mode;
/* list of supported chipsets */
int (*chipset_detect[])(struct ppc_data *, int) = {
ppc_pc873xx_detect,
ppc_smc37c66xgt_detect,
ppc_w83877f_detect,
ppc_smc37c935_detect,
ppc_generic_detect,
NULL
};
#endif
/* 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;
#ifdef PPC_PROBE_CHIPSET
/* 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");
#endif
ppc->ppc_mode = ppc_generic_detect(ppc, chipset_mode);
#ifdef PPC_PROBE_CHIPSET
} else {
for (i=0; chipset_detect[i] != NULL; i++) {
if ((mode = chipset_detect[i](ppc, chipset_mode)) != -1) {
ppc->ppc_mode = mode;
break;
}
}
}
#endif
/* 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(device_t dev, struct ppb_microseq **p_msq)
{
struct ppc_data *ppc = DEVTOSOFTC(dev);
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(void *arg)
{
device_t dev = (device_t)arg;
struct ppc_data *ppc = (struct ppc_data *)device_get_softc(dev);
u_char ctr, ecr, str;
str = r_str(ppc);
ctr = r_ctr(ppc);
ecr = r_ecr(ppc);
#if PPC_DEBUG > 1
printf("![%x/%x/%x]", ctr, ecr, str);
#endif
/* don't use ecp mode with IRQENABLE set */
if (ctr & IRQENABLE) {
return;
}
/* interrupts are generated by nFault signal
* only in ECP mode */
if ((str & nFAULT) && (ppc->ppc_mode & PPB_ECP)) {
/* check if ppc driver has programmed the
* nFault interrupt */
if (ppc->ppc_irqstat & PPC_IRQ_nFAULT) {
w_ecr(ppc, ecr | PPC_nFAULT_INTR);
ppc->ppc_irqstat &= ~PPC_IRQ_nFAULT;
} else {
/* shall be handled by underlying layers XXX */
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(device_t dev, 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(device_t dev, char *buf, int len, int how)
{
struct ppc_data *ppc = DEVTOSOFTC(dev);
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) && (ppc->ppc_registered)) {
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);
}
static void
ppc_reset_epp(device_t dev)
{
struct ppc_data *ppc = DEVTOSOFTC(dev);
ppc_reset_epp_timeout(ppc);
return;
}
static int
ppc_setmode(device_t dev, int mode)
{
struct ppc_data *ppc = DEVTOSOFTC(dev);
switch (ppc->ppc_type) {
case PPC_TYPE_SMCLIKE:
return (ppc_smclike_setmode(ppc, mode));
break;
case PPC_TYPE_GENERIC:
default:
return (ppc_generic_setmode(ppc, mode));
break;
}
/* not reached */
return (ENXIO);
}
static struct isa_pnp_id lpc_ids[] = {
{ 0x0004d041, "Standard parallel printer port" }, /* PNP0400 */
{ 0x0104d041, "ECP parallel printer port" }, /* PNP0401 */
{ 0 }
};
static int
ppc_probe(device_t dev)
{
#ifdef __i386__
static short next_bios_ppc = 0;
#endif
struct ppc_data *ppc;
device_t parent;
int error;
u_long port;
parent = device_get_parent(dev);
error = ISA_PNP_PROBE(parent, dev, lpc_ids);
if (error == ENXIO)
return (ENXIO);
else if (error != 0) /* XXX shall be set after detection */
device_set_desc(dev, "Parallel port");
/*
* Allocate the ppc_data structure.
*/
ppc = DEVTOSOFTC(dev);
bzero(ppc, sizeof(struct ppc_data));
ppc->rid_irq = ppc->rid_drq = ppc->rid_ioport = 0;
ppc->res_irq = ppc->res_drq = ppc->res_ioport = 0;
/* retrieve ISA parameters */
error = bus_get_resource(dev, SYS_RES_IOPORT, 0, &port, NULL);
#ifdef __i386__
/*
* If port not specified, use bios list.
*/
if (error) {
if((next_bios_ppc < BIOS_MAX_PPC) &&
(*(BIOS_PORTS+next_bios_ppc) != 0) ) {
port = *(BIOS_PORTS+next_bios_ppc++);
if (bootverbose)
device_printf(dev, "parallel port found at 0x%x\n",
(int) port);
} else {
device_printf(dev, "parallel port not found.\n");
return ENXIO;
}
bus_set_resource(dev, SYS_RES_IOPORT, 0, port,
IO_LPTSIZE_EXTENDED);
}
#endif
#ifdef __alpha__
/*
* There isn't a bios list on alpha. Put it in the usual place.
*/
if (error) {
bus_set_resource(dev, SYS_RES_IOPORT, 0, 0x3bc,
IO_LPTSIZE_NORMAL);
}
#endif
/* IO port is mandatory */
/* Try "extended" IO port range...*/
ppc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
&ppc->rid_ioport, 0, ~0,
IO_LPTSIZE_EXTENDED, RF_ACTIVE);
if (ppc->res_ioport != 0) {
if (bootverbose)
device_printf(dev, "using extended I/O port range\n");
} else {
/* Failed? If so, then try the "normal" IO port range... */
ppc->res_ioport = bus_alloc_resource(dev, SYS_RES_IOPORT,
&ppc->rid_ioport, 0, ~0,
IO_LPTSIZE_NORMAL,
RF_ACTIVE);
if (ppc->res_ioport != 0) {
if (bootverbose)
device_printf(dev, "using normal I/O port range\n");
} else {
device_printf(dev, "cannot reserve I/O port range\n");
goto error;
}
}
ppc->ppc_base = rman_get_start(ppc->res_ioport);
ppc->ppc_flags = device_get_flags(dev);
if (!(ppc->ppc_flags & 0x20)) {
ppc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &ppc->rid_irq,
0ul, ~0ul, 1, RF_SHAREABLE);
ppc->res_drq = bus_alloc_resource(dev, SYS_RES_DRQ, &ppc->rid_drq,
0ul, ~0ul, 1, RF_ACTIVE);
}
if (ppc->res_irq)
ppc->ppc_irq = rman_get_start(ppc->res_irq);
if (ppc->res_drq)
ppc->ppc_dmachan = rman_get_start(ppc->res_drq);
ppc->ppc_unit = device_get_unit(dev);
ppc->ppc_model = GENERIC;
ppc->ppc_mode = PPB_COMPATIBLE;
ppc->ppc_epp = (ppc->ppc_flags & 0x10) >> 4;
ppc->ppc_type = PPC_TYPE_GENERIC;
/*
* Try to detect the chipset and its mode.
*/
if (ppc_detect(ppc, ppc->ppc_flags & 0xf))
goto error;
return (0);
error:
if (ppc->res_irq != 0) {
bus_release_resource(dev, SYS_RES_IRQ, ppc->rid_irq,
ppc->res_irq);
}
if (ppc->res_ioport != 0) {
bus_deactivate_resource(dev, SYS_RES_IOPORT, ppc->rid_ioport,
ppc->res_ioport);
bus_release_resource(dev, SYS_RES_IOPORT, ppc->rid_ioport,
ppc->res_ioport);
}
if (ppc->res_drq != 0) {
bus_deactivate_resource(dev, SYS_RES_DRQ, ppc->rid_drq,
ppc->res_drq);
bus_release_resource(dev, SYS_RES_DRQ, ppc->rid_drq,
ppc->res_drq);
}
return (ENXIO);
}
static int
ppc_attach(device_t dev)
{
struct ppc_data *ppc = DEVTOSOFTC(dev);
device_t ppbus;
device_t parent = device_get_parent(dev);
device_printf(dev, "%s chipset (%s) in %s mode%s\n",
ppc_models[ppc->ppc_model], 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)
device_printf(dev, "FIFO with %d/%d/%d bytes threshold\n",
ppc->ppc_fifo, ppc->ppc_wthr, ppc->ppc_rthr);
if ((ppc->ppc_avm & PPB_ECP) && (ppc->ppc_dmachan > 0)) {
/* acquire the DMA channel forever */ /* XXX */
isa_dma_acquire(ppc->ppc_dmachan);
isa_dmainit(ppc->ppc_dmachan, 1024); /* nlpt.BUFSIZE */
}
/* add ppbus as a child of this isa to parallel bridge */
ppbus = device_add_child(dev, "ppbus", -1);
/*
* Probe the ppbus and attach devices found.
*/
device_probe_and_attach(ppbus);
/* register the ppc interrupt handler as default */
if (ppc->res_irq) {
/* default to the tty mask for registration */ /* XXX */
if (BUS_SETUP_INTR(parent, dev, ppc->res_irq, INTR_TYPE_TTY,
ppcintr, dev, &ppc->intr_cookie) == 0) {
/* remember the ppcintr is registered */
ppc->ppc_registered = 1;
}
}
return (0);
}
static u_char
ppc_io(device_t ppcdev, int iop, u_char *addr, int cnt, u_char byte)
{
struct ppc_data *ppc = DEVTOSOFTC(ppcdev);
switch (iop) {
case PPB_OUTSB_EPP:
outsb(ppc->ppc_base + PPC_EPP_DATA, addr, cnt);
break;
case PPB_OUTSW_EPP:
outsw(ppc->ppc_base + PPC_EPP_DATA, addr, cnt);
break;
case PPB_OUTSL_EPP:
outsl(ppc->ppc_base + PPC_EPP_DATA, addr, cnt);
break;
case PPB_INSB_EPP:
insb(ppc->ppc_base + PPC_EPP_DATA, addr, cnt);
break;
case PPB_INSW_EPP:
insw(ppc->ppc_base + PPC_EPP_DATA, addr, cnt);
break;
case PPB_INSL_EPP:
insl(ppc->ppc_base + PPC_EPP_DATA, addr, cnt);
break;
case PPB_RDTR:
return (r_dtr(ppc));
break;
case PPB_RSTR:
return (r_str(ppc));
break;
case PPB_RCTR:
return (r_ctr(ppc));
break;
case PPB_REPP_A:
return (r_epp_A(ppc));
break;
case PPB_REPP_D:
return (r_epp_D(ppc));
break;
case PPB_RECR:
return (r_ecr(ppc));
break;
case PPB_RFIFO:
return (r_fifo(ppc));
break;
case PPB_WDTR:
w_dtr(ppc, byte);
break;
case PPB_WSTR:
w_str(ppc, byte);
break;
case PPB_WCTR:
w_ctr(ppc, byte);
break;
case PPB_WEPP_A:
w_epp_A(ppc, byte);
break;
case PPB_WEPP_D:
w_epp_D(ppc, byte);
break;
case PPB_WECR:
w_ecr(ppc, byte);
break;
case PPB_WFIFO:
w_fifo(ppc, byte);
break;
default:
panic("%s: unknown I/O operation", __FUNCTION__);
break;
}
return (0); /* not significative */
}
static int
ppc_read_ivar(device_t bus, device_t dev, int index, uintptr_t *val)
{
struct ppc_data *ppc = (struct ppc_data *)device_get_softc(bus);
switch (index) {
case PPC_IVAR_EPP_PROTO:
*val = (u_long)ppc->ppc_epp;
break;
case PPC_IVAR_IRQ:
*val = (u_long)ppc->ppc_irq;
break;
default:
return (ENOENT);
}
return (0);
}
/*
* Resource is useless here since ppbus devices' interrupt handlers are
* multiplexed to the same resource initially allocated by ppc
*/
static int
ppc_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
void (*ihand)(void *), void *arg, void **cookiep)
{
int error;
struct ppc_data *ppc = DEVTOSOFTC(bus);
if (ppc->ppc_registered) {
/* XXX refuse registration if DMA is in progress */
/* first, unregister the default interrupt handler */
if ((error = BUS_TEARDOWN_INTR(device_get_parent(bus),
bus, ppc->res_irq, ppc->intr_cookie)))
return (error);
/* bus_deactivate_resource(bus, SYS_RES_IRQ, ppc->rid_irq, */
/* ppc->res_irq); */
/* DMA/FIFO operation won't be possible anymore */
ppc->ppc_registered = 0;
}
/* pass registration to the upper layer, ignore the incoming resource */
return (BUS_SETUP_INTR(device_get_parent(bus), child,
r, flags, ihand, arg, cookiep));
}
/*
* When no underlying device has a registered interrupt, register the ppc
* layer one
*/
static int
ppc_teardown_intr(device_t bus, device_t child, struct resource *r, void *ih)
{
int error;
struct ppc_data *ppc = DEVTOSOFTC(bus);
device_t parent = device_get_parent(bus);
/* pass unregistration to the upper layer */
if ((error = BUS_TEARDOWN_INTR(parent, child, r, ih)))
return (error);
/* default to the tty mask for registration */ /* XXX */
if (ppc->ppc_irq &&
!(error = BUS_SETUP_INTR(parent, bus, ppc->res_irq,
INTR_TYPE_TTY, ppcintr, bus, &ppc->intr_cookie))) {
/* remember the ppcintr is registered */
ppc->ppc_registered = 1;
}
return (error);
}
DRIVER_MODULE(ppc, isa, ppc_driver, ppc_devclass, 0, 0);
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