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/*-
* Copyright (c) 2006 Marcel Moolenaar
* 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 ``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: release/9.1.0/sys/dev/puc/puc.c 223091 2011-06-14 18:19:48Z jhb $");
#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 <sys/mutex.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/puc/puc_bus.h>
#include <dev/puc/puc_cfg.h>
#include <dev/puc/puc_bfe.h>
#define PUC_ISRCCNT 5
struct puc_port {
struct puc_bar *p_bar;
struct resource *p_rres;
struct resource *p_ires;
device_t p_dev;
int p_nr;
int p_type;
int p_rclk;
int p_hasintr:1;
serdev_intr_t *p_ihsrc[PUC_ISRCCNT];
void *p_iharg;
int p_ipend;
};
devclass_t puc_devclass;
const char puc_driver_name[] = "puc";
MALLOC_DEFINE(M_PUC, "PUC", "PUC driver");
struct puc_bar *
puc_get_bar(struct puc_softc *sc, int rid)
{
struct puc_bar *bar;
struct rman *rm;
u_long end, start;
int error, i;
/* Find the BAR entry with the given RID. */
i = 0;
while (i < PUC_PCI_BARS && sc->sc_bar[i].b_rid != rid)
i++;
if (i < PUC_PCI_BARS)
return (&sc->sc_bar[i]);
/* Not found. If we're looking for an unused entry, return NULL. */
if (rid == -1)
return (NULL);
/* Get an unused entry for us to fill. */
bar = puc_get_bar(sc, -1);
if (bar == NULL)
return (NULL);
bar->b_rid = rid;
bar->b_type = SYS_RES_IOPORT;
bar->b_res = bus_alloc_resource_any(sc->sc_dev, bar->b_type,
&bar->b_rid, RF_ACTIVE);
if (bar->b_res == NULL) {
bar->b_rid = rid;
bar->b_type = SYS_RES_MEMORY;
bar->b_res = bus_alloc_resource_any(sc->sc_dev, bar->b_type,
&bar->b_rid, RF_ACTIVE);
if (bar->b_res == NULL) {
bar->b_rid = -1;
return (NULL);
}
}
/* Update our managed space. */
rm = (bar->b_type == SYS_RES_IOPORT) ? &sc->sc_ioport : &sc->sc_iomem;
start = rman_get_start(bar->b_res);
end = rman_get_end(bar->b_res);
error = rman_manage_region(rm, start, end);
if (error) {
bus_release_resource(sc->sc_dev, bar->b_type, bar->b_rid,
bar->b_res);
bar->b_res = NULL;
bar->b_rid = -1;
bar = NULL;
}
return (bar);
}
static int
puc_intr(void *arg)
{
struct puc_port *port;
struct puc_softc *sc = arg;
u_long ds, dev, devs;
int i, idx, ipend, isrc, nints;
uint8_t ilr;
nints = 0;
while (1) {
/*
* Obtain the set of devices with pending interrupts.
*/
devs = sc->sc_serdevs;
if (sc->sc_ilr == PUC_ILR_DIGI) {
idx = 0;
while (devs & (0xfful << idx)) {
ilr = ~bus_read_1(sc->sc_port[idx].p_rres, 7);
devs &= ~0ul ^ ((u_long)ilr << idx);
idx += 8;
}
} else if (sc->sc_ilr == PUC_ILR_QUATECH) {
/*
* Don't trust the value if it's the same as the option
* register. It may mean that the ILR is not active and
* we're reading the option register instead. This may
* lead to false positives on 8-port boards.
*/
ilr = bus_read_1(sc->sc_port[0].p_rres, 7);
if (ilr != (sc->sc_cfg_data & 0xff))
devs &= (u_long)ilr;
}
if (devs == 0UL)
break;
/*
* Obtain the set of interrupt sources from those devices
* that have pending interrupts.
*/
ipend = 0;
idx = 0, dev = 1UL;
ds = devs;
while (ds != 0UL) {
while ((ds & dev) == 0UL)
idx++, dev <<= 1;
ds &= ~dev;
port = &sc->sc_port[idx];
port->p_ipend = SERDEV_IPEND(port->p_dev);
ipend |= port->p_ipend;
}
if (ipend == 0)
break;
i = 0, isrc = SER_INT_OVERRUN;
while (ipend) {
while (i < PUC_ISRCCNT && !(ipend & isrc))
i++, isrc <<= 1;
KASSERT(i < PUC_ISRCCNT, ("%s", __func__));
ipend &= ~isrc;
idx = 0, dev = 1UL;
ds = devs;
while (ds != 0UL) {
while ((ds & dev) == 0UL)
idx++, dev <<= 1;
ds &= ~dev;
port = &sc->sc_port[idx];
if (!(port->p_ipend & isrc))
continue;
if (port->p_ihsrc[i] != NULL)
(*port->p_ihsrc[i])(port->p_iharg);
nints++;
}
}
}
return ((nints > 0) ? FILTER_HANDLED : FILTER_STRAY);
}
int
puc_bfe_attach(device_t dev)
{
char buffer[64];
struct puc_bar *bar;
struct puc_port *port;
struct puc_softc *sc;
struct rman *rm;
intptr_t res;
bus_addr_t ofs, start;
bus_size_t size;
bus_space_handle_t bsh;
bus_space_tag_t bst;
int error, idx;
sc = device_get_softc(dev);
for (idx = 0; idx < PUC_PCI_BARS; idx++)
sc->sc_bar[idx].b_rid = -1;
do {
sc->sc_ioport.rm_type = RMAN_ARRAY;
error = rman_init(&sc->sc_ioport);
if (!error) {
sc->sc_iomem.rm_type = RMAN_ARRAY;
error = rman_init(&sc->sc_iomem);
if (!error) {
sc->sc_irq.rm_type = RMAN_ARRAY;
error = rman_init(&sc->sc_irq);
if (!error)
break;
rman_fini(&sc->sc_iomem);
}
rman_fini(&sc->sc_ioport);
}
return (error);
} while (0);
snprintf(buffer, sizeof(buffer), "%s I/O port mapping",
device_get_nameunit(dev));
sc->sc_ioport.rm_descr = strdup(buffer, M_PUC);
snprintf(buffer, sizeof(buffer), "%s I/O memory mapping",
device_get_nameunit(dev));
sc->sc_iomem.rm_descr = strdup(buffer, M_PUC);
snprintf(buffer, sizeof(buffer), "%s port numbers",
device_get_nameunit(dev));
sc->sc_irq.rm_descr = strdup(buffer, M_PUC);
error = puc_config(sc, PUC_CFG_GET_NPORTS, 0, &res);
KASSERT(error == 0, ("%s %d", __func__, __LINE__));
sc->sc_nports = (int)res;
sc->sc_port = malloc(sc->sc_nports * sizeof(struct puc_port),
M_PUC, M_WAITOK|M_ZERO);
error = rman_manage_region(&sc->sc_irq, 1, sc->sc_nports);
if (error)
goto fail;
error = puc_config(sc, PUC_CFG_SETUP, 0, &res);
if (error)
goto fail;
for (idx = 0; idx < sc->sc_nports; idx++) {
port = &sc->sc_port[idx];
port->p_nr = idx + 1;
error = puc_config(sc, PUC_CFG_GET_TYPE, idx, &res);
if (error)
goto fail;
port->p_type = res;
error = puc_config(sc, PUC_CFG_GET_RID, idx, &res);
if (error)
goto fail;
bar = puc_get_bar(sc, res);
if (bar == NULL) {
error = ENXIO;
goto fail;
}
port->p_bar = bar;
start = rman_get_start(bar->b_res);
error = puc_config(sc, PUC_CFG_GET_OFS, idx, &res);
if (error)
goto fail;
ofs = res;
error = puc_config(sc, PUC_CFG_GET_LEN, idx, &res);
if (error)
goto fail;
size = res;
rm = (bar->b_type == SYS_RES_IOPORT)
? &sc->sc_ioport: &sc->sc_iomem;
port->p_rres = rman_reserve_resource(rm, start + ofs,
start + ofs + size - 1, size, 0, NULL);
if (port->p_rres != NULL) {
bsh = rman_get_bushandle(bar->b_res);
bst = rman_get_bustag(bar->b_res);
bus_space_subregion(bst, bsh, ofs, size, &bsh);
rman_set_bushandle(port->p_rres, bsh);
rman_set_bustag(port->p_rres, bst);
}
port->p_ires = rman_reserve_resource(&sc->sc_irq, port->p_nr,
port->p_nr, 1, 0, NULL);
if (port->p_ires == NULL) {
error = ENXIO;
goto fail;
}
error = puc_config(sc, PUC_CFG_GET_CLOCK, idx, &res);
if (error)
goto fail;
port->p_rclk = res;
port->p_dev = device_add_child(dev, NULL, -1);
if (port->p_dev != NULL)
device_set_ivars(port->p_dev, (void *)port);
}
error = puc_config(sc, PUC_CFG_GET_ILR, 0, &res);
if (error)
goto fail;
sc->sc_ilr = res;
if (bootverbose && sc->sc_ilr != 0)
device_printf(dev, "using interrupt latch register\n");
sc->sc_irid = 0;
sc->sc_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->sc_irid,
RF_ACTIVE|RF_SHAREABLE);
if (sc->sc_ires != NULL) {
error = bus_setup_intr(dev, sc->sc_ires,
INTR_TYPE_TTY, puc_intr, NULL, sc, &sc->sc_icookie);
if (error)
error = bus_setup_intr(dev, sc->sc_ires,
INTR_TYPE_TTY | INTR_MPSAFE, NULL,
(driver_intr_t *)puc_intr, sc, &sc->sc_icookie);
else
sc->sc_fastintr = 1;
if (error) {
device_printf(dev, "could not activate interrupt\n");
bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irid,
sc->sc_ires);
sc->sc_ires = NULL;
}
}
if (sc->sc_ires == NULL) {
/* XXX no interrupt resource. Force polled mode. */
sc->sc_polled = 1;
}
/* Probe and attach our children. */
for (idx = 0; idx < sc->sc_nports; idx++) {
port = &sc->sc_port[idx];
if (port->p_dev == NULL)
continue;
error = device_probe_and_attach(port->p_dev);
if (error) {
device_delete_child(dev, port->p_dev);
port->p_dev = NULL;
}
}
/*
* If there are no serdev devices, then our interrupt handler
* will do nothing. Tear it down.
*/
if (sc->sc_serdevs == 0UL)
bus_teardown_intr(dev, sc->sc_ires, sc->sc_icookie);
return (0);
fail:
for (idx = 0; idx < sc->sc_nports; idx++) {
port = &sc->sc_port[idx];
if (port->p_dev != NULL)
device_delete_child(dev, port->p_dev);
if (port->p_rres != NULL)
rman_release_resource(port->p_rres);
if (port->p_ires != NULL)
rman_release_resource(port->p_ires);
}
for (idx = 0; idx < PUC_PCI_BARS; idx++) {
bar = &sc->sc_bar[idx];
if (bar->b_res != NULL)
bus_release_resource(sc->sc_dev, bar->b_type,
bar->b_rid, bar->b_res);
}
rman_fini(&sc->sc_irq);
free(__DECONST(void *, sc->sc_irq.rm_descr), M_PUC);
rman_fini(&sc->sc_iomem);
free(__DECONST(void *, sc->sc_iomem.rm_descr), M_PUC);
rman_fini(&sc->sc_ioport);
free(__DECONST(void *, sc->sc_ioport.rm_descr), M_PUC);
free(sc->sc_port, M_PUC);
return (error);
}
int
puc_bfe_detach(device_t dev)
{
struct puc_bar *bar;
struct puc_port *port;
struct puc_softc *sc;
int error, idx;
sc = device_get_softc(dev);
/* Detach our children. */
error = 0;
for (idx = 0; idx < sc->sc_nports; idx++) {
port = &sc->sc_port[idx];
if (port->p_dev == NULL)
continue;
if (device_detach(port->p_dev) == 0) {
device_delete_child(dev, port->p_dev);
if (port->p_rres != NULL)
rman_release_resource(port->p_rres);
if (port->p_ires != NULL)
rman_release_resource(port->p_ires);
} else
error = ENXIO;
}
if (error)
return (error);
if (sc->sc_serdevs != 0UL)
bus_teardown_intr(dev, sc->sc_ires, sc->sc_icookie);
bus_release_resource(dev, SYS_RES_IRQ, sc->sc_irid, sc->sc_ires);
for (idx = 0; idx < PUC_PCI_BARS; idx++) {
bar = &sc->sc_bar[idx];
if (bar->b_res != NULL)
bus_release_resource(sc->sc_dev, bar->b_type,
bar->b_rid, bar->b_res);
}
rman_fini(&sc->sc_irq);
free(__DECONST(void *, sc->sc_irq.rm_descr), M_PUC);
rman_fini(&sc->sc_iomem);
free(__DECONST(void *, sc->sc_iomem.rm_descr), M_PUC);
rman_fini(&sc->sc_ioport);
free(__DECONST(void *, sc->sc_ioport.rm_descr), M_PUC);
free(sc->sc_port, M_PUC);
return (0);
}
int
puc_bfe_probe(device_t dev, const struct puc_cfg *cfg)
{
struct puc_softc *sc;
intptr_t res;
int error;
sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_cfg = cfg;
/* We don't attach to single-port serial cards. */
if (cfg->ports == PUC_PORT_1S || cfg->ports == PUC_PORT_1P)
return (EDOOFUS);
error = puc_config(sc, PUC_CFG_GET_NPORTS, 0, &res);
if (error)
return (error);
error = puc_config(sc, PUC_CFG_GET_DESC, 0, &res);
if (error)
return (error);
if (res != 0)
device_set_desc(dev, (const char *)res);
return (BUS_PROBE_DEFAULT);
}
struct resource *
puc_bus_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_port *port;
struct resource *res;
device_t assigned, originator;
int error;
/* Get our immediate child. */
originator = child;
while (child != NULL && device_get_parent(child) != dev)
child = device_get_parent(child);
if (child == NULL)
return (NULL);
port = device_get_ivars(child);
KASSERT(port != NULL, ("%s %d", __func__, __LINE__));
if (rid == NULL || *rid != 0)
return (NULL);
/* We only support default allocations. */
if (start != 0UL || end != ~0UL)
return (NULL);
if (type == port->p_bar->b_type)
res = port->p_rres;
else if (type == SYS_RES_IRQ)
res = port->p_ires;
else
return (NULL);
if (res == NULL)
return (NULL);
assigned = rman_get_device(res);
if (assigned == NULL) /* Not allocated */
rman_set_device(res, originator);
else if (assigned != originator)
return (NULL);
if (flags & RF_ACTIVE) {
error = rman_activate_resource(res);
if (error) {
if (assigned == NULL)
rman_set_device(res, NULL);
return (NULL);
}
}
return (res);
}
int
puc_bus_release_resource(device_t dev, device_t child, int type, int rid,
struct resource *res)
{
struct puc_port *port;
device_t originator;
/* Get our immediate child. */
originator = child;
while (child != NULL && device_get_parent(child) != dev)
child = device_get_parent(child);
if (child == NULL)
return (EINVAL);
port = device_get_ivars(child);
KASSERT(port != NULL, ("%s %d", __func__, __LINE__));
if (rid != 0 || res == NULL)
return (EINVAL);
if (type == port->p_bar->b_type) {
if (res != port->p_rres)
return (EINVAL);
} else if (type == SYS_RES_IRQ) {
if (res != port->p_ires)
return (EINVAL);
if (port->p_hasintr)
return (EBUSY);
} else
return (EINVAL);
if (rman_get_device(res) != originator)
return (ENXIO);
if (rman_get_flags(res) & RF_ACTIVE)
rman_deactivate_resource(res);
rman_set_device(res, NULL);
return (0);
}
int
puc_bus_get_resource(device_t dev, device_t child, int type, int rid,
u_long *startp, u_long *countp)
{
struct puc_port *port;
struct resource *res;
u_long start;
/* Get our immediate child. */
while (child != NULL && device_get_parent(child) != dev)
child = device_get_parent(child);
if (child == NULL)
return (EINVAL);
port = device_get_ivars(child);
KASSERT(port != NULL, ("%s %d", __func__, __LINE__));
if (type == port->p_bar->b_type)
res = port->p_rres;
else if (type == SYS_RES_IRQ)
res = port->p_ires;
else
return (ENXIO);
if (rid != 0 || res == NULL)
return (ENXIO);
start = rman_get_start(res);
if (startp != NULL)
*startp = start;
if (countp != NULL)
*countp = rman_get_end(res) - start + 1;
return (0);
}
int
puc_bus_setup_intr(device_t dev, device_t child, struct resource *res,
int flags, driver_filter_t *filt, void (*ihand)(void *), void *arg, void **cookiep)
{
struct puc_port *port;
struct puc_softc *sc;
device_t originator;
int i, isrc, serdev;
sc = device_get_softc(dev);
/* Get our immediate child. */
originator = child;
while (child != NULL && device_get_parent(child) != dev)
child = device_get_parent(child);
if (child == NULL)
return (EINVAL);
port = device_get_ivars(child);
KASSERT(port != NULL, ("%s %d", __func__, __LINE__));
if (cookiep == NULL || res != port->p_ires)
return (EINVAL);
/* We demand that serdev devices use filter_only interrupts. */
if (ihand != NULL)
return (ENXIO);
if (rman_get_device(port->p_ires) != originator)
return (ENXIO);
/*
* Have non-serdev ports handled by the bus implementation. It
* supports multiple handlers for a single interrupt as it is,
* so we wouldn't add value if we did it ourselves.
*/
serdev = 0;
if (port->p_type == PUC_TYPE_SERIAL) {
i = 0, isrc = SER_INT_OVERRUN;
while (i < PUC_ISRCCNT) {
port->p_ihsrc[i] = SERDEV_IHAND(originator, isrc);
if (port->p_ihsrc[i] != NULL)
serdev = 1;
i++, isrc <<= 1;
}
}
if (!serdev)
return (BUS_SETUP_INTR(device_get_parent(dev), originator,
sc->sc_ires, flags, filt, ihand, arg, cookiep));
sc->sc_serdevs |= 1UL << (port->p_nr - 1);
port->p_hasintr = 1;
port->p_iharg = arg;
*cookiep = port;
return (0);
}
int
puc_bus_teardown_intr(device_t dev, device_t child, struct resource *res,
void *cookie)
{
struct puc_port *port;
struct puc_softc *sc;
device_t originator;
int i;
sc = device_get_softc(dev);
/* Get our immediate child. */
originator = child;
while (child != NULL && device_get_parent(child) != dev)
child = device_get_parent(child);
if (child == NULL)
return (EINVAL);
port = device_get_ivars(child);
KASSERT(port != NULL, ("%s %d", __func__, __LINE__));
if (res != port->p_ires)
return (EINVAL);
if (rman_get_device(port->p_ires) != originator)
return (ENXIO);
if (!port->p_hasintr)
return (BUS_TEARDOWN_INTR(device_get_parent(dev), originator,
sc->sc_ires, cookie));
if (cookie != port)
return (EINVAL);
port->p_hasintr = 0;
port->p_iharg = NULL;
for (i = 0; i < PUC_ISRCCNT; i++)
port->p_ihsrc[i] = NULL;
return (0);
}
int
puc_bus_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
{
struct puc_port *port;
/* Get our immediate child. */
while (child != NULL && device_get_parent(child) != dev)
child = device_get_parent(child);
if (child == NULL)
return (EINVAL);
port = device_get_ivars(child);
KASSERT(port != NULL, ("%s %d", __func__, __LINE__));
if (result == NULL)
return (EINVAL);
switch(index) {
case PUC_IVAR_CLOCK:
*result = port->p_rclk;
break;
case PUC_IVAR_TYPE:
*result = port->p_type;
break;
default:
return (ENOENT);
}
return (0);
}
int
puc_bus_print_child(device_t dev, device_t child)
{
struct puc_port *port;
int retval;
port = device_get_ivars(child);
retval = 0;
retval += bus_print_child_header(dev, child);
retval += printf(" at port %d", port->p_nr);
retval += bus_print_child_footer(dev, child);
return (retval);
}
int
puc_bus_child_location_str(device_t dev, device_t child, char *buf,
size_t buflen)
{
struct puc_port *port;
port = device_get_ivars(child);
snprintf(buf, buflen, "port=%d", port->p_nr);
return (0);
}
int
puc_bus_child_pnpinfo_str(device_t dev, device_t child, char *buf,
size_t buflen)
{
struct puc_port *port;
port = device_get_ivars(child);
snprintf(buf, buflen, "type=%d", port->p_type);
return (0);
}