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-rw-r--r--sys/isa/isa_common.c554
1 files changed, 535 insertions, 19 deletions
diff --git a/sys/isa/isa_common.c b/sys/isa/isa_common.c
index c16b6632f1a5..8d597fe8cae1 100644
--- a/sys/isa/isa_common.c
+++ b/sys/isa/isa_common.c
@@ -99,13 +99,391 @@ static int
isa_attach(device_t dev)
{
/*
- * Arrange for bus_generic_attach(dev) to be called later.
+ * Arrange for isa_probe_children(dev) to be called later. XXX
*/
isa_bus_device = dev;
return 0;
}
/*
+ * Find a working set of memory regions for a child using the ranges
+ * in *config and return the regions in *result. Returns non-zero if
+ * a set of ranges was found.
+ */
+static int
+isa_find_memory(device_t child,
+ struct isa_config *config,
+ struct isa_config *result)
+{
+ device_t dev = device_get_parent(child);
+ int success, i;
+ struct resource *res[ISA_NMEM];
+
+ /*
+ * First clear out any existing resource definitions.
+ */
+ for (i = 0; i < ISA_NMEM; i++) {
+ ISA_DELETE_RESOURCE(dev, child, SYS_RES_MEMORY, i);
+ res[i] = NULL;
+ }
+
+ success = 1;
+ result->ic_nmem = config->ic_nmem;
+ for (i = 0; i < config->ic_nmem; i++) {
+ u_int32_t start, end, size, align;
+ for (start = config->ic_mem[i].ir_start,
+ end = config->ic_mem[i].ir_end,
+ size = config->ic_mem[i].ir_size,
+ align = config->ic_mem[i].ir_align;
+ start + size - 1 <= end;
+ start += align) {
+ ISA_SET_RESOURCE(dev, child, SYS_RES_MEMORY, i,
+ start, size);
+ res[i] = bus_alloc_resource(child,
+ SYS_RES_MEMORY, &i,
+ 0, ~0, 1, RF_ACTIVE);
+ if (res[i]) {
+ result->ic_mem[i].ir_start = start;
+ result->ic_mem[i].ir_end = start + size - 1;
+ result->ic_mem[i].ir_size = size;
+ result->ic_mem[i].ir_align = align;
+ break;
+ }
+ }
+
+ /*
+ * If we didn't find a place for memory range i, then
+ * give up now.
+ */
+ if (!res[i]) {
+ success = 0;
+ break;
+ }
+ }
+
+ for (i = 0; i < ISA_NMEM; i++) {
+ if (res[i])
+ bus_release_resource(child, SYS_RES_MEMORY,
+ i, res[i]);
+ }
+
+ return success;
+}
+
+/*
+ * Find a working set of port regions for a child using the ranges
+ * in *config and return the regions in *result. Returns non-zero if
+ * a set of ranges was found.
+ */
+static int
+isa_find_port(device_t child,
+ struct isa_config *config,
+ struct isa_config *result)
+{
+ device_t dev = device_get_parent(child);
+ int success, i;
+ struct resource *res[ISA_NPORT];
+
+ /*
+ * First clear out any existing resource definitions.
+ */
+ for (i = 0; i < ISA_NPORT; i++) {
+ ISA_DELETE_RESOURCE(dev, child, SYS_RES_IOPORT, i);
+ res[i] = NULL;
+ }
+
+ success = 1;
+ result->ic_nport = config->ic_nport;
+ for (i = 0; i < config->ic_nport; i++) {
+ u_int32_t start, end, size, align;
+ for (start = config->ic_port[i].ir_start,
+ end = config->ic_port[i].ir_end,
+ size = config->ic_port[i].ir_size,
+ align = config->ic_port[i].ir_align;
+ start + size - 1 <= end;
+ start += align) {
+ ISA_SET_RESOURCE(dev, child, SYS_RES_IOPORT, i,
+ start, size);
+ res[i] = bus_alloc_resource(child,
+ SYS_RES_IOPORT, &i,
+ 0, ~0, 1, RF_ACTIVE);
+ if (res[i]) {
+ result->ic_port[i].ir_start = start;
+ result->ic_port[i].ir_end = start + size - 1;
+ result->ic_port[i].ir_size = size;
+ result->ic_port[i].ir_align = align;
+ break;
+ }
+ }
+
+ /*
+ * If we didn't find a place for port range i, then
+ * give up now.
+ */
+ if (!res[i]) {
+ success = 0;
+ break;
+ }
+ }
+
+ for (i = 0; i < ISA_NPORT; i++) {
+ if (res[i])
+ bus_release_resource(child, SYS_RES_IOPORT,
+ i, res[i]);
+ }
+
+ return success;
+}
+
+/*
+ * Return the index of the first bit in the mask (or -1 if mask is empty.
+ */
+static int
+find_first_bit(u_int32_t mask)
+{
+ return ffs(mask) - 1;
+}
+
+/*
+ * Return the index of the next bit in the mask, or -1 if there are no more.
+ */
+static int
+find_next_bit(u_int32_t mask, int bit)
+{
+ bit++;
+ while (bit < 32 && !(mask & (1 << bit)))
+ bit++;
+ if (bit != 32)
+ return bit;
+ return -1;
+}
+
+/*
+ * Find a working set of irqs for a child using the masks in *config
+ * and return the regions in *result. Returns non-zero if a set of
+ * irqs was found.
+ */
+static int
+isa_find_irq(device_t child,
+ struct isa_config *config,
+ struct isa_config *result)
+{
+ device_t dev = device_get_parent(child);
+ int success, i;
+ struct resource *res[ISA_NIRQ];
+
+ /*
+ * First clear out any existing resource definitions.
+ */
+ for (i = 0; i < ISA_NIRQ; i++) {
+ ISA_DELETE_RESOURCE(dev, child, SYS_RES_IRQ, i);
+ res[i] = NULL;
+ }
+
+ success = 1;
+ result->ic_nirq = config->ic_nirq;
+ for (i = 0; i < config->ic_nirq; i++) {
+ u_int32_t mask = config->ic_irqmask[i];
+ int irq;
+ for (irq = find_first_bit(mask);
+ irq != -1;
+ irq = find_next_bit(mask, irq)) {
+ ISA_SET_RESOURCE(dev, child, SYS_RES_IRQ, i,
+ irq, 1);
+ res[i] = bus_alloc_resource(child,
+ SYS_RES_IRQ, &i,
+ 0, ~0, 1, RF_ACTIVE);
+ if (res[i]) {
+ result->ic_irqmask[i] = (1 << irq);
+ break;
+ }
+ }
+
+ /*
+ * If we didn't find a place for irq range i, then
+ * give up now.
+ */
+ if (!res[i]) {
+ success = 0;
+ break;
+ }
+ }
+
+ for (i = 0; i < ISA_NIRQ; i++) {
+ if (res[i])
+ bus_release_resource(child, SYS_RES_IRQ,
+ i, res[i]);
+ }
+
+ return success;
+}
+
+/*
+ * Find a working set of drqs for a child using the masks in *config
+ * and return the regions in *result. Returns non-zero if a set of
+ * drqs was found.
+ */
+static int
+isa_find_drq(device_t child,
+ struct isa_config *config,
+ struct isa_config *result)
+{
+ device_t dev = device_get_parent(child);
+ int success, i;
+ struct resource *res[ISA_NDRQ];
+
+ /*
+ * First clear out any existing resource definitions.
+ */
+ for (i = 0; i < ISA_NDRQ; i++) {
+ ISA_DELETE_RESOURCE(dev, child, SYS_RES_DRQ, i);
+ res[i] = NULL;
+ }
+
+ success = 1;
+ result->ic_ndrq = config->ic_ndrq;
+ for (i = 0; i < config->ic_ndrq; i++) {
+ u_int32_t mask = config->ic_drqmask[i];
+ int drq;
+ for (drq = find_first_bit(mask);
+ drq != -1;
+ drq = find_next_bit(mask, drq)) {
+ ISA_SET_RESOURCE(dev, child, SYS_RES_DRQ, i,
+ drq, 1);
+ res[i] = bus_alloc_resource(child,
+ SYS_RES_DRQ, &i,
+ 0, ~0, 1, RF_ACTIVE);
+ if (res[i]) {
+ result->ic_drqmask[i] = (1 << drq);
+ break;
+ }
+ }
+
+ /*
+ * If we didn't find a place for drq range i, then
+ * give up now.
+ */
+ if (!res[i]) {
+ success = 0;
+ break;
+ }
+ }
+
+ for (i = 0; i < ISA_NDRQ; i++) {
+ if (res[i])
+ bus_release_resource(child, SYS_RES_DRQ,
+ i, res[i]);
+ }
+
+ return success;
+}
+
+/*
+ * Attempt to find a working set of resources for a device. Return
+ * non-zero if a working configuration is found.
+ */
+static int
+isa_assign_resources(device_t child)
+{
+ struct isa_device *idev = DEVTOISA(child);
+ struct isa_config_entry *ice;
+ struct isa_config config;
+
+ bzero(&config, sizeof config);
+ TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
+ if (!isa_find_memory(child, &ice->ice_config, &config))
+ continue;
+ if (!isa_find_port(child, &ice->ice_config, &config))
+ continue;
+ if (!isa_find_irq(child, &ice->ice_config, &config))
+ continue;
+ if (!isa_find_drq(child, &ice->ice_config, &config))
+ continue;
+
+ /*
+ * A working configuration was found enable the device
+ * with this configuration.
+ */
+ if (idev->id_config_cb) {
+ idev->id_config_cb(idev->id_config_arg,
+ &config, 1);
+ return 1;
+ }
+ }
+
+ /*
+ * Disable the device.
+ */
+ bzero(&config, sizeof config);
+ if (idev->id_config_cb)
+ idev->id_config_cb(idev->id_config_arg, &config, 0);
+ device_disable(child);
+
+ return 0;
+}
+
+/*
+ * Called after other devices have initialised to probe for isa devices.
+ */
+void
+isa_probe_children(device_t dev)
+{
+ device_t *children;
+ int nchildren, i;
+
+ if (device_get_children(dev, &children, &nchildren))
+ return;
+
+ /*
+ * First probe all non-pnp devices so that they claim their
+ * resources first.
+ */
+ for (i = 0; i < nchildren; i++) {
+ device_t child = children[i];
+ struct isa_device *idev = DEVTOISA(child);
+
+ if (TAILQ_FIRST(&idev->id_configs))
+ continue;
+
+ device_probe_and_attach(child);
+ }
+
+ /*
+ * Next assign resource to pnp devices and probe them.
+ */
+ for (i = 0; i < nchildren; i++) {
+ device_t child = children[i];
+ struct isa_device* idev = DEVTOISA(child);
+
+ if (!TAILQ_FIRST(&idev->id_configs))
+ continue;
+
+ if (isa_assign_resources(child)) {
+ struct resource_list_entry *rle;
+
+ device_probe_and_attach(child);
+
+ /*
+ * Claim any unallocated resources to keep other
+ * devices from using them.
+ */
+ SLIST_FOREACH(rle, &idev->id_resources, link) {
+ if (!rle->res) {
+ int rid = rle->rid;
+ resource_list_alloc(dev, child,
+ rle->type,
+ &rid,
+ 0, ~0, 1,
+ RF_ACTIVE);
+ }
+ }
+ }
+ }
+
+ free(children, M_TEMP);
+}
+
+/*
* Add a new child with default ivars.
*/
static device_t
@@ -120,6 +498,7 @@ isa_add_child(device_t dev, int order, const char *name, int unit)
resource_list_init(&idev->id_resources);
idev->id_flags = 0;
+ TAILQ_INIT(&idev->id_configs);
return device_add_child_ordered(dev, order, name, unit, idev);
}
@@ -128,26 +507,27 @@ static void
isa_print_resources(struct resource_list *rl, const char *name, int type,
const char *format)
{
- struct resource_list_entry *rle0 = resource_list_find(rl, type, 0);
- struct resource_list_entry *rle1 = resource_list_find(rl, type, 1);
-
- if (rle0 || rle1) {
- printf(" %s ", name);
- if (rle0) {
- printf(format, rle0->start);
- if (rle0->count > 1) {
- printf("-");
- printf(format, rle0->start + rle0->count - 1);
- }
- }
- if (rle1) {
- if (rle0)
+ struct resource_list_entry *rle;
+ int printed;
+ int i;
+
+ printed = 0;
+ for (i = 0; i < 16; i++) {
+ rle = resource_list_find(rl, type, i);
+ if (rle) {
+ if (printed == 0)
+ printf(" %s ", name);
+ else if (printed > 0)
printf(",");
- printf(format, rle1->start);
- if (rle1->count > 1) {
+ printed++;
+ printf(format, rle->start);
+ if (rle->count > 1) {
printf("-");
- printf(format, rle1->start + rle1->count - 1);
+ printf(format, rle->start + rle->count - 1);
}
+ } else if (i > 3) {
+ /* check the first few regardless */
+ break;
}
}
}
@@ -355,6 +735,25 @@ isa_write_ivar(device_t bus, device_t dev,
return (0);
}
+/*
+ * Free any resources which the driver missed or which we were holding for
+ * it (see isa_probe_children).
+ */
+static void
+isa_child_detached(device_t dev, device_t child)
+{
+ struct isa_device* idev = DEVTOISA(child);
+ struct resource_list_entry *rle;
+
+ SLIST_FOREACH(rle, &idev->id_resources, link) {
+ if (rle->res)
+ resource_list_release(dev, child,
+ rle->type,
+ rle->rid,
+ rle->res);
+ }
+}
+
static int
isa_set_resource(device_t dev, device_t child, int type, int rid,
u_long start, u_long count)
@@ -365,7 +764,15 @@ isa_set_resource(device_t dev, device_t child, int type, int rid,
if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY
&& type != SYS_RES_IRQ && type != SYS_RES_DRQ)
return EINVAL;
- if (rid < 0 || rid > 1)
+ if (rid < 0)
+ return EINVAL;
+ if (type == SYS_RES_IOPORT && rid >= ISA_NPORT)
+ return EINVAL;
+ if (type == SYS_RES_MEMORY && rid >= ISA_NMEM)
+ return EINVAL;
+ if (type == SYS_RES_IRQ && rid >= ISA_NIRQ)
+ return EINVAL;
+ if (type == SYS_RES_DRQ && rid >= ISA_NDRQ)
return EINVAL;
resource_list_add(rl, type, rid, start, start + count - 1, count);
@@ -399,6 +806,65 @@ isa_delete_resource(device_t dev, device_t child, int type, int rid)
resource_list_delete(rl, type, rid);
}
+static int
+isa_add_config(device_t dev, device_t child,
+ int priority, struct isa_config *config)
+{
+ struct isa_device* idev = DEVTOISA(child);
+ struct isa_config_entry *newice, *ice;
+
+ newice = malloc(sizeof *ice, M_DEVBUF, M_NOWAIT);
+ if (!newice)
+ return ENOMEM;
+
+ newice->ice_priority = priority;
+ newice->ice_config = *config;
+
+ TAILQ_FOREACH(ice, &idev->id_configs, ice_link) {
+ if (ice->ice_priority > priority)
+ break;
+ }
+ if (ice)
+ TAILQ_INSERT_BEFORE(ice, newice, ice_link);
+ else
+ TAILQ_INSERT_TAIL(&idev->id_configs, newice, ice_link);
+
+ return 0;
+}
+
+static void
+isa_set_config_callback(device_t dev, device_t child,
+ isa_config_cb *fn, void *arg)
+{
+ struct isa_device* idev = DEVTOISA(child);
+
+ idev->id_config_cb = fn;
+ idev->id_config_arg = arg;
+}
+
+static int
+isa_pnp_probe(device_t dev, device_t child, struct isa_pnp_id *ids)
+{
+ struct isa_device* idev = DEVTOISA(child);
+
+ if (!idev->id_vendorid)
+ return ENOENT;
+
+ while (ids->ip_id) {
+ /*
+ * Really ought to support >1 compat id per device.
+ */
+ if (idev->id_logicalid == ids->ip_id
+ || idev->id_compatid == ids->ip_id) {
+ device_set_desc(child, ids->ip_desc);
+ return 0;
+ }
+ ids++;
+ }
+
+ return ENXIO;
+}
+
static device_method_t isa_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, isa_probe),
@@ -413,6 +879,7 @@ static device_method_t isa_methods[] = {
DEVMETHOD(bus_print_child, isa_print_child),
DEVMETHOD(bus_read_ivar, isa_read_ivar),
DEVMETHOD(bus_write_ivar, isa_write_ivar),
+ DEVMETHOD(bus_child_detached, isa_child_detached),
DEVMETHOD(bus_alloc_resource, isa_alloc_resource),
DEVMETHOD(bus_release_resource, isa_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
@@ -424,6 +891,9 @@ static device_method_t isa_methods[] = {
DEVMETHOD(isa_set_resource, isa_set_resource),
DEVMETHOD(isa_get_resource, isa_get_resource),
DEVMETHOD(isa_delete_resource, isa_delete_resource),
+ DEVMETHOD(isa_add_config, isa_add_config),
+ DEVMETHOD(isa_set_config_callback, isa_set_config_callback),
+ DEVMETHOD(isa_pnp_probe, isa_pnp_probe),
{ 0, 0 }
};
@@ -441,3 +911,49 @@ DRIVER_MODULE(isa, isab, isa_driver, isa_devclass, 0, 0);
#ifdef __i386__
DRIVER_MODULE(isa, nexus, isa_driver, isa_devclass, 0, 0);
#endif
+
+/*
+ * A fallback driver for reporting un-matched pnp devices.
+ */
+
+static int
+unknown_probe(device_t dev)
+{
+ /*
+ * Only match pnp devices.
+ */
+ if (isa_get_vendorid(dev) != 0)
+ return -100;
+ return ENXIO;
+}
+
+static int
+unknown_attach(device_t dev)
+{
+ return 0;
+}
+
+static int
+unknown_detach(device_t dev)
+{
+ return 0;
+}
+
+static device_method_t unknown_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, unknown_probe),
+ DEVMETHOD(device_attach, unknown_attach),
+ DEVMETHOD(device_detach, unknown_detach),
+
+ { 0, 0 }
+};
+
+static driver_t unknown_driver = {
+ "unknown",
+ unknown_methods,
+ 1, /* no softc */
+};
+
+static devclass_t unknown_devclass;
+
+DRIVER_MODULE(unknown, isa, unknown_driver, unknown_devclass, 0, 0);
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-09 07:11:01 +0000