FreeBSD-5.3/sys/dev/puc/puc.c
/* $NetBSD: puc.c,v 1.7 2000/07/29 17:43:38 jlam Exp $ */
/*-
* Copyright (c) 2002 JF Hay. All rights reserved.
* Copyright (c) 2000 M. Warner Losh. 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 unmodified, 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 ``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 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.
*/
/*
* Copyright (c) 1996, 1998, 1999
* Christopher G. Demetriou. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou
* for the NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/puc/puc.c,v 1.33 2004/07/01 17:23:49 imp Exp $");
/*
* PCI "universal" communication card device driver, glues com, lpt,
* and similar ports to PCI via bridge chip often much larger than
* the devices being glued.
*
* Author: Christopher G. Demetriou, May 14, 1998 (derived from NetBSD
* sys/dev/pci/pciide.c, revision 1.6).
*
* These devices could be (and some times are) described as
* communications/{serial,parallel}, etc. devices with known
* programming interfaces, but those programming interfaces (in
* particular the BAR assignments for devices, etc.) in fact are not
* particularly well defined.
*
* After I/we have seen more of these devices, it may be possible
* to generalize some of these bits. In particular, devices which
* describe themselves as communications/serial/16[45]50, and
* communications/parallel/??? might be attached via direct
* 'com' and 'lpt' attachments to pci.
*/
#define __RMAN_RESOURCE_VISIBLE /* Shouldn't be there */
#include "opt_puc.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#define PUC_ENTRAILS 1
#include <dev/puc/pucvar.h>
struct puc_device {
struct resource_list resources;
int port;
int regshft;
u_int serialfreq;
u_int subtype;
};
static void puc_intr(void *arg);
static int puc_find_free_unit(char *);
#ifdef PUC_DEBUG
static void puc_print_resource_list(struct resource_list *);
#endif
devclass_t puc_devclass;
static int
puc_port_bar_index(struct puc_softc *sc, int bar)
{
int i;
for (i = 0; i < PUC_MAX_BAR; i += 1) {
if (!sc->sc_bar_mappings[i].used)
break;
if (sc->sc_bar_mappings[i].bar == bar)
return (i);
}
sc->sc_bar_mappings[i].bar = bar;
sc->sc_bar_mappings[i].used = 1;
return (i);
}
static int
puc_probe_ilr(struct puc_softc *sc, struct resource *res)
{
u_char t1, t2;
int i;
switch (sc->sc_desc.ilr_type) {
case PUC_ILR_TYPE_DIGI:
sc->ilr_st = rman_get_bustag(res);
sc->ilr_sh = rman_get_bushandle(res);
for (i = 0; i < 2 && sc->sc_desc.ilr_offset[i] != 0; i++) {
t1 = bus_space_read_1(sc->ilr_st, sc->ilr_sh,
sc->sc_desc.ilr_offset[i]);
t1 = ~t1;
bus_space_write_1(sc->ilr_st, sc->ilr_sh,
sc->sc_desc.ilr_offset[i], t1);
t2 = bus_space_read_1(sc->ilr_st, sc->ilr_sh,
sc->sc_desc.ilr_offset[i]);
if (t2 == t1)
return (0);
}
return (1);
default:
break;
}
return (0);
}
int
puc_attach(device_t dev, const struct puc_device_description *desc)
{
char *typestr;
int bidx, childunit, i, irq_setup, ressz, rid, type;
struct puc_softc *sc;
struct puc_device *pdev;
struct resource *res;
struct resource_list_entry *rle;
bus_space_handle_t bh;
if (desc == NULL)
return (ENXIO);
sc = (struct puc_softc *)device_get_softc(dev);
bzero(sc, sizeof(*sc));
sc->sc_desc = *desc;
#ifdef PUC_DEBUG
bootverbose = 1;
printf("puc: name: %s\n", sc->sc_desc.name);
#endif
rid = 0;
res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE | RF_SHAREABLE);
if (!res)
return (ENXIO);
sc->irqres = res;
sc->irqrid = rid;
#ifdef PUC_FASTINTR
irq_setup = BUS_SETUP_INTR(device_get_parent(dev), dev, res,
INTR_TYPE_TTY | INTR_FAST, puc_intr, sc, &sc->intr_cookie);
if (irq_setup == 0)
sc->fastintr = INTR_FAST;
else
irq_setup = BUS_SETUP_INTR(device_get_parent(dev), dev, res,
INTR_TYPE_TTY, puc_intr, sc, &sc->intr_cookie);
#else
irq_setup = BUS_SETUP_INTR(device_get_parent(dev), dev, res,
INTR_TYPE_TTY, puc_intr, sc, &sc->intr_cookie);
#endif
if (irq_setup != 0)
return (ENXIO);
rid = 0;
for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
if (i > 0 && rid == sc->sc_desc.ports[i].bar)
sc->barmuxed = 1;
rid = sc->sc_desc.ports[i].bar;
bidx = puc_port_bar_index(sc, rid);
if (sc->sc_bar_mappings[bidx].res != NULL)
continue;
type = (sc->sc_desc.ports[i].flags & PUC_FLAGS_MEMORY)
? SYS_RES_MEMORY : SYS_RES_IOPORT;
res = bus_alloc_resource_any(dev, type, &rid,
RF_ACTIVE);
if (res == NULL &&
sc->sc_desc.ports[i].flags & PUC_FLAGS_ALTRES) {
type = (type == SYS_RES_IOPORT)
? SYS_RES_MEMORY : SYS_RES_IOPORT;
res = bus_alloc_resource_any(dev, type, &rid,
RF_ACTIVE);
}
if (res == NULL) {
device_printf(dev, "could not get resource\n");
continue;
}
sc->sc_bar_mappings[bidx].type = type;
sc->sc_bar_mappings[bidx].res = res;
if (sc->sc_desc.ilr_type != PUC_ILR_TYPE_NONE) {
sc->ilr_enabled = puc_probe_ilr(sc, res);
if (sc->ilr_enabled)
device_printf(dev, "ILR enabled\n");
else
device_printf(dev, "ILR disabled\n");
}
#ifdef PUC_DEBUG
printf("%s rid %d bst %lx, start %lx, end %lx\n",
(type == SYS_RES_MEMORY) ? "memory" : "port", rid,
(u_long)rman_get_bustag(res), (u_long)rman_get_start(res),
(u_long)rman_get_end(res));
#endif
}
if (desc->init != NULL) {
i = desc->init(sc);
if (i != 0)
return (i);
}
for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
rid = sc->sc_desc.ports[i].bar;
bidx = puc_port_bar_index(sc, rid);
if (sc->sc_bar_mappings[bidx].res == NULL)
continue;
switch (sc->sc_desc.ports[i].type & ~PUC_PORT_SUBTYPE_MASK) {
case PUC_PORT_TYPE_COM:
typestr = "sio";
break;
case PUC_PORT_TYPE_LPT:
typestr = "ppc";
break;
case PUC_PORT_TYPE_UART:
typestr = "uart";
break;
default:
continue;
}
switch (sc->sc_desc.ports[i].type & PUC_PORT_SUBTYPE_MASK) {
case PUC_PORT_UART_SAB82532:
ressz = 64;
break;
case PUC_PORT_UART_Z8530:
ressz = 2;
break;
default:
ressz = 8;
break;
}
pdev = malloc(sizeof(struct puc_device), M_DEVBUF,
M_NOWAIT | M_ZERO);
if (!pdev)
continue;
resource_list_init(&pdev->resources);
/* First fake up an IRQ resource. */
resource_list_add(&pdev->resources, SYS_RES_IRQ, 0,
rman_get_start(sc->irqres), rman_get_end(sc->irqres),
rman_get_end(sc->irqres) - rman_get_start(sc->irqres) + 1);
rle = resource_list_find(&pdev->resources, SYS_RES_IRQ, 0);
rle->res = sc->irqres;
/* Now fake an IOPORT or MEMORY resource */
res = sc->sc_bar_mappings[bidx].res;
type = sc->sc_bar_mappings[bidx].type;
resource_list_add(&pdev->resources, type, 0,
rman_get_start(res) + sc->sc_desc.ports[i].offset,
rman_get_start(res) + sc->sc_desc.ports[i].offset
+ ressz - 1, ressz);
rle = resource_list_find(&pdev->resources, type, 0);
if (sc->barmuxed == 0) {
rle->res = sc->sc_bar_mappings[bidx].res;
} else {
rle->res = malloc(sizeof(struct resource), M_DEVBUF,
M_WAITOK | M_ZERO);
if (rle->res == NULL) {
free(pdev, M_DEVBUF);
return (ENOMEM);
}
rman_set_start(rle->res, rman_get_start(res) +
sc->sc_desc.ports[i].offset);
rman_set_end(rle->res, rman_get_start(rle->res) +
ressz - 1);
rman_set_bustag(rle->res, rman_get_bustag(res));
bus_space_subregion(rman_get_bustag(rle->res),
rman_get_bushandle(res),
sc->sc_desc.ports[i].offset, ressz,
&bh);
rman_set_bushandle(rle->res, bh);
}
pdev->port = i + 1;
pdev->serialfreq = sc->sc_desc.ports[i].serialfreq;
pdev->subtype = sc->sc_desc.ports[i].type &
PUC_PORT_SUBTYPE_MASK;
pdev->regshft = sc->sc_desc.ports[i].regshft;
childunit = puc_find_free_unit(typestr);
if (childunit < 0 && strcmp(typestr, "uart") != 0) {
typestr = "uart";
childunit = puc_find_free_unit(typestr);
}
sc->sc_ports[i].dev = device_add_child(dev, typestr,
childunit);
if (sc->sc_ports[i].dev == NULL) {
if (sc->barmuxed) {
bus_space_unmap(rman_get_bustag(rle->res),
rman_get_bushandle(rle->res), ressz);
free(rle->res, M_DEVBUF);
free(pdev, M_DEVBUF);
}
continue;
}
device_set_ivars(sc->sc_ports[i].dev, pdev);
device_set_desc(sc->sc_ports[i].dev, sc->sc_desc.name);
#ifdef PUC_DEBUG
printf("puc: type %d, bar %x, offset %x\n",
sc->sc_desc.ports[i].type,
sc->sc_desc.ports[i].bar,
sc->sc_desc.ports[i].offset);
puc_print_resource_list(&pdev->resources);
#endif
device_set_flags(sc->sc_ports[i].dev,
sc->sc_desc.ports[i].flags);
if (device_probe_and_attach(sc->sc_ports[i].dev) != 0) {
if (sc->barmuxed) {
bus_space_unmap(rman_get_bustag(rle->res),
rman_get_bushandle(rle->res), ressz);
free(rle->res, M_DEVBUF);
free(pdev, M_DEVBUF);
}
}
}
#ifdef PUC_DEBUG
bootverbose = 0;
#endif
return (0);
}
static u_int32_t
puc_ilr_read(struct puc_softc *sc)
{
u_int32_t mask;
int i;
mask = 0;
switch (sc->sc_desc.ilr_type) {
case PUC_ILR_TYPE_DIGI:
for (i = 1; i >= 0 && sc->sc_desc.ilr_offset[i] != 0; i--) {
mask = (mask << 8) | (bus_space_read_1(sc->ilr_st,
sc->ilr_sh, sc->sc_desc.ilr_offset[i]) & 0xff);
}
break;
default:
mask = 0xffffffff;
break;
}
return (mask);
}
/*
* This is an interrupt handler. For boards that can't tell us which
* device generated the interrupt it just calls all the registered
* handlers sequencially, but for boards that can tell us which
* device(s) generated the interrupt it calls only handlers for devices
* that actually generated the interrupt.
*/
static void
puc_intr(void *arg)
{
int i;
u_int32_t ilr_mask;
struct puc_softc *sc;
sc = (struct puc_softc *)arg;
ilr_mask = sc->ilr_enabled ? puc_ilr_read(sc) : 0xffffffff;
for (i = 0; i < PUC_MAX_PORTS; i++)
if (sc->sc_ports[i].ihand != NULL &&
((ilr_mask >> i) & 0x00000001))
(sc->sc_ports[i].ihand)(sc->sc_ports[i].ihandarg);
}
static int
puc_find_free_unit(char *name)
{
devclass_t dc;
int start;
int unit;
unit = 0;
start = 0;
while (resource_int_value(name, unit, "port", &start) == 0 &&
start > 0)
unit++;
dc = devclass_find(name);
if (dc == NULL)
return (-1);
while (devclass_get_device(dc, unit))
unit++;
#ifdef PUC_DEBUG
printf("puc: Using %s%d\n", name, unit);
#endif
return (unit);
}
#ifdef PUC_DEBUG
static void
puc_print_resource_list(struct resource_list *rl)
{
#if 0
struct resource_list_entry *rle;
printf("print_resource_list: rl %p\n", rl);
SLIST_FOREACH(rle, rl, link)
printf(" type %x, rid %x start %lx end %lx count %lx\n",
rle->type, rle->rid, rle->start, rle->end, rle->count);
printf("print_resource_list: end.\n");
#endif
}
#endif
struct resource *
puc_alloc_resource(device_t dev, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct puc_device *pdev;
struct resource *retval;
struct resource_list *rl;
struct resource_list_entry *rle;
device_t my_child;
/*
* in the case of a child of child we need to find our immediate child
*/
for (my_child = child; device_get_parent(my_child) != dev;
my_child = device_get_parent(my_child));
pdev = device_get_ivars(my_child);
rl = &pdev->resources;
#ifdef PUC_DEBUG
printf("puc_alloc_resource: pdev %p, looking for t %x, r %x\n",
pdev, type, *rid);
puc_print_resource_list(rl);
#endif
retval = NULL;
rle = resource_list_find(rl, type, *rid);
if (rle) {
#ifdef PUC_DEBUG
printf("found rle, %lx, %lx, %lx\n", rle->start, rle->end,
rle->count);
#endif
retval = rle->res;
}
#ifdef PUC_DEBUG
else
printf("oops rle is gone\n");
#endif
return (retval);
}
int
puc_release_resource(device_t dev, device_t child, int type, int rid,
struct resource *res)
{
return (0);
}
int
puc_get_resource(device_t dev, device_t child, int type, int rid,
u_long *startp, u_long *countp)
{
struct puc_device *pdev;
struct resource_list *rl;
struct resource_list_entry *rle;
pdev = device_get_ivars(child);
rl = &pdev->resources;
#ifdef PUC_DEBUG
printf("puc_get_resource: pdev %p, looking for t %x, r %x\n", pdev,
type, rid);
puc_print_resource_list(rl);
#endif
rle = resource_list_find(rl, type, rid);
if (rle) {
#ifdef PUC_DEBUG
printf("found rle %p,", rle);
#endif
if (startp != NULL)
*startp = rle->start;
if (countp != NULL)
*countp = rle->count;
#ifdef PUC_DEBUG
printf(" %lx, %lx\n", rle->start, rle->count);
#endif
return (0);
} else
printf("oops rle is gone\n");
return (ENXIO);
}
int
puc_setup_intr(device_t dev, device_t child, struct resource *r, int flags,
void (*ihand)(void *), void *arg, void **cookiep)
{
int i;
struct puc_softc *sc;
sc = (struct puc_softc *)device_get_softc(dev);
if ((flags & INTR_FAST) != sc->fastintr)
return (ENXIO);
for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
if (sc->sc_ports[i].dev == child) {
if (sc->sc_ports[i].ihand != 0)
return (ENXIO);
sc->sc_ports[i].ihand = ihand;
sc->sc_ports[i].ihandarg = arg;
*cookiep = arg;
return (0);
}
}
return (ENXIO);
}
int
puc_teardown_intr(device_t dev, device_t child, struct resource *r,
void *cookie)
{
int i;
struct puc_softc *sc;
sc = (struct puc_softc *)device_get_softc(dev);
for (i = 0; PUC_PORT_VALID(sc->sc_desc, i); i++) {
if (sc->sc_ports[i].dev == child) {
sc->sc_ports[i].ihand = NULL;
sc->sc_ports[i].ihandarg = NULL;
return (0);
}
}
return (ENXIO);
}
int
puc_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
{
struct puc_device *pdev;
pdev = device_get_ivars(child);
if (pdev == NULL)
return (ENOENT);
switch(index) {
case PUC_IVAR_FREQ:
*result = pdev->serialfreq;
break;
case PUC_IVAR_PORT:
*result = pdev->port;
break;
case PUC_IVAR_REGSHFT:
*result = pdev->regshft;
break;
case PUC_IVAR_SUBTYPE:
*result = pdev->subtype;
break;
default:
return (ENOENT);
}
return (0);
}