MIPS: IP22/IP28: Improve GIO support
- added interrupt support for GIO devices
- improved detection of GIO cards on Indigo2
- added more known GIO cards
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7055/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/sgi-ip22/ip22-gio.c b/arch/mips/sgi-ip22/ip22-gio.c
index ab0e379..8e52446 100644
--- a/arch/mips/sgi-ip22/ip22-gio.c
+++ b/arch/mips/sgi-ip22/ip22-gio.c
@@ -19,6 +19,9 @@
} gio_name_table[] = {
{ .name = "SGI Impact", .id = 0x10 },
{ .name = "Phobos G160", .id = 0x35 },
+ { .name = "Phobos G130", .id = 0x36 },
+ { .name = "Phobos G100", .id = 0x37 },
+ { .name = "Set Engineering GFE", .id = 0x38 },
/* fake IDs */
{ .name = "SGI Newport", .id = 0x7e },
{ .name = "SGI GR2/GR3", .id = 0x7f },
@@ -293,7 +296,16 @@
* data matches
*/
ptr8 = (void *)CKSEG1ADDR(addr + 3);
- get_dbe(tmp8, ptr8);
+ if (get_dbe(tmp8, ptr8)) {
+ /*
+ * 32bit access worked, but 8bit doesn't
+ * so we don't see phantom reads on
+ * a pipelined bus, but a real card which
+ * doesn't support 8 bit reads
+ */
+ *res = tmp32;
+ return 1;
+ }
ptr16 = (void *)CKSEG1ADDR(addr + 2);
get_dbe(tmp16, ptr16);
if (tmp8 == (tmp16 & 0xff) &&
@@ -324,7 +336,7 @@
}
-static void ip22_check_gio(int slotno, unsigned long addr)
+static void ip22_check_gio(int slotno, unsigned long addr, int irq)
{
const char *name = "Unknown";
struct gio_device *gio_dev;
@@ -338,9 +350,9 @@
else {
if (!ip22_gio_id(addr, &tmp)) {
/*
- * no GIO signature at start address of slot, but
- * Newport doesn't have one, so let's check usea
- * status register
+ * no GIO signature at start address of slot
+ * since Newport doesn't have one, we check if
+ * user status register is readable
*/
if (ip22_gio_id(addr + NEWPORT_USTATUS_OFFS, &tmp))
tmp = 0x7e;
@@ -369,6 +381,7 @@
gio_dev->resource.start = addr;
gio_dev->resource.end = addr + 0x3fffff;
gio_dev->resource.flags = IORESOURCE_MEM;
+ gio_dev->irq = irq;
dev_set_name(&gio_dev->dev, "%d", slotno);
gio_device_register(gio_dev);
} else
@@ -408,16 +421,17 @@
request_resource(&iomem_resource, &gio_bus_resource);
printk(KERN_INFO "GIO: Probing bus...\n");
- if (ip22_is_fullhouse() ||
- !get_dbe(pbdma, (unsigned int *)&hpc3c1->pbdma[1])) {
- /* Indigo2 and ChallengeS */
- ip22_check_gio(0, GIO_SLOT_GFX_BASE);
- ip22_check_gio(1, GIO_SLOT_EXP0_BASE);
+ if (ip22_is_fullhouse()) {
+ /* Indigo2 */
+ ip22_check_gio(0, GIO_SLOT_GFX_BASE, SGI_GIO_1_IRQ);
+ ip22_check_gio(1, GIO_SLOT_EXP0_BASE, SGI_GIO_1_IRQ);
} else {
- /* Indy */
- ip22_check_gio(0, GIO_SLOT_GFX_BASE);
- ip22_check_gio(1, GIO_SLOT_EXP0_BASE);
- ip22_check_gio(2, GIO_SLOT_EXP1_BASE);
+ /* Indy/Challenge S */
+ if (get_dbe(pbdma, (unsigned int *)&hpc3c1->pbdma[1]))
+ ip22_check_gio(0, GIO_SLOT_GFX_BASE,
+ SGI_GIO_0_IRQ);
+ ip22_check_gio(1, GIO_SLOT_EXP0_BASE, SGI_GIOEXP0_IRQ);
+ ip22_check_gio(2, GIO_SLOT_EXP1_BASE, SGI_GIOEXP1_IRQ);
}
} else
device_unregister(&gio_bus);