bcma: add functions to scan cores needed on SoCs
The chip common and mips core have to be setup early in the boot
process to get the cpu clock.
bcma_bus_early_register() gets pointers to some space to store the core
data and searches for the chip common and mips core and initializes
chip common. After that was done and the kernel is out of early boot we
just have to run bcma_bus_register() and it will search for the other
cores, initialize and register them.
The cores are getting the same numbers as before.
Acked-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/bcma/scan.c b/drivers/bcma/scan.c
index 7970553..bf9f806 100644
--- a/drivers/bcma/scan.c
+++ b/drivers/bcma/scan.c
@@ -200,7 +200,20 @@
return addrl;
}
+static struct bcma_device *bcma_find_core_by_index(struct bcma_bus *bus,
+ u16 index)
+{
+ struct bcma_device *core;
+
+ list_for_each_entry(core, &bus->cores, list) {
+ if (core->core_index == index)
+ return core;
+ }
+ return NULL;
+}
+
static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr,
+ struct bcma_device_id *match, int core_num,
struct bcma_device *core)
{
s32 tmp;
@@ -251,6 +264,21 @@
return -ENXIO;
}
+ if (bcma_find_core_by_index(bus, core_num)) {
+ bcma_erom_skip_component(bus, eromptr);
+ return -ENODEV;
+ }
+
+ if (match && ((match->manuf != BCMA_ANY_MANUF &&
+ match->manuf != core->id.manuf) ||
+ (match->id != BCMA_ANY_ID && match->id != core->id.id) ||
+ (match->rev != BCMA_ANY_REV && match->rev != core->id.rev) ||
+ (match->class != BCMA_ANY_CLASS && match->class != core->id.class)
+ )) {
+ bcma_erom_skip_component(bus, eromptr);
+ return -ENODEV;
+ }
+
/* get & parse master ports */
for (i = 0; i < ports[0]; i++) {
u32 mst_port_d = bcma_erom_get_mst_port(bus, eromptr);
@@ -312,10 +340,13 @@
return 0;
}
-static void bcma_init_bus(struct bcma_bus *bus)
+void bcma_init_bus(struct bcma_bus *bus)
{
s32 tmp;
+ if (bus->init_done)
+ return;
+
INIT_LIST_HEAD(&bus->cores);
bus->nr_cores = 0;
@@ -325,6 +356,7 @@
bus->chipinfo.id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT;
bus->chipinfo.rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT;
bus->chipinfo.pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT;
+ bus->init_done = true;
}
int bcma_bus_scan(struct bcma_bus *bus)
@@ -332,7 +364,7 @@
u32 erombase;
u32 __iomem *eromptr, *eromend;
- int err;
+ int err, core_num = 0;
bcma_init_bus(bus);
@@ -349,23 +381,74 @@
INIT_LIST_HEAD(&core->list);
core->bus = bus;
- err = bcma_get_next_core(bus, &eromptr, core);
- if (err == -ENXIO)
+ err = bcma_get_next_core(bus, &eromptr, NULL, core_num, core);
+ if (err == -ENODEV) {
+ core_num++;
+ continue;
+ } else if (err == -ENXIO)
continue;
else if (err == -ESPIPE)
break;
else if (err < 0)
return err;
+ core->core_index = core_num++;
+ bus->nr_cores++;
+
pr_info("Core %d found: %s "
"(manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
- bus->nr_cores, bcma_device_name(&core->id),
+ core->core_index, bcma_device_name(&core->id),
core->id.manuf, core->id.id, core->id.rev,
core->id.class);
- core->core_index = bus->nr_cores++;
list_add(&core->list, &bus->cores);
}
return 0;
}
+
+int __init bcma_bus_scan_early(struct bcma_bus *bus,
+ struct bcma_device_id *match,
+ struct bcma_device *core)
+{
+ u32 erombase;
+ u32 __iomem *eromptr, *eromend;
+
+ int err, core_num = 0;
+
+ erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
+ eromptr = bus->mmio;
+ eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);
+
+ bcma_scan_switch_core(bus, erombase);
+
+ while (eromptr < eromend) {
+ memset(core, 0, sizeof(*core));
+ INIT_LIST_HEAD(&core->list);
+ core->bus = bus;
+
+ err = bcma_get_next_core(bus, &eromptr, match, core_num, core);
+ if (err == -ENODEV) {
+ core_num++;
+ continue;
+ } else if (err == -ENXIO)
+ continue;
+ else if (err == -ESPIPE)
+ break;
+ else if (err < 0)
+ return err;
+
+ core->core_index = core_num++;
+ bus->nr_cores++;
+ pr_info("Core %d found: %s "
+ "(manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
+ core->core_index, bcma_device_name(&core->id),
+ core->id.manuf, core->id.id, core->id.rev,
+ core->id.class);
+
+ list_add(&core->list, &bus->cores);
+ return 0;
+ }
+
+ return -ENODEV;
+}