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>

4 files changed, 38 insertions, 17 deletions

diff --git a/arch/mips/include/asm/gio_device.h b/arch/mips/include/asm/gio_device.h
index 0878701712f8..4be1a57cdbb0 100644
--- a/arch/mips/include/asm/gio_device.h
+++ b/arch/mips/include/asm/gio_device.h
@@ -50,7 +50,7 @@ static inline void gio_device_free(struct gio_device *dev)
 extern int gio_register_driver(struct gio_driver *);
 extern void gio_unregister_driver(struct gio_driver *);
 
-#define gio_get_drvdata(_dev)        drv_get_drvdata(&(_dev)->dev)
-#define gio_set_drvdata(_dev, data)  drv_set_drvdata(&(_dev)->dev, (data))
+#define gio_get_drvdata(_dev)        dev_get_drvdata(&(_dev)->dev)
+#define gio_set_drvdata(_dev, data)  dev_set_drvdata(&(_dev)->dev, (data))
 
 extern void gio_set_master(struct gio_device *);
diff --git a/arch/mips/include/asm/sgi/ip22.h b/arch/mips/include/asm/sgi/ip22.h
index 8db1a3588cf2..87ec9eaa04e3 100644
--- a/arch/mips/include/asm/sgi/ip22.h
+++ b/arch/mips/include/asm/sgi/ip22.h
@@ -69,6 +69,8 @@
 #define SGI_EISA_IRQ    SGINT_LOCAL2 + 3        /* EISA interrupts */
 #define SGI_KEYBD_IRQ   SGINT_LOCAL2 + 4        /* keyboard */
 #define SGI_SERIAL_IRQ  SGINT_LOCAL2 + 5        /* onboard serial */
+#define SGI_GIOEXP0_IRQ (SGINT_LOCAL2 + 6)      /* Indy GIO EXP0 */
+#define SGI_GIOEXP1_IRQ (SGINT_LOCAL2 + 7)      /* Indy GIO EXP1 */
 
 #define ip22_is_fullhouse()     (sgioc->sysid & SGIOC_SYSID_FULLHOUSE)
 
diff --git a/arch/mips/sgi-ip22/ip22-gio.c b/arch/mips/sgi-ip22/ip22-gio.c
index ab0e379dc7e0..8e52446286ca 100644
--- a/arch/mips/sgi-ip22/ip22-gio.c
+++ b/arch/mips/sgi-ip22/ip22-gio.c
@@ -19,6 +19,9 @@ static struct {
 } 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 @@ static int ip22_gio_id(unsigned long addr, u32 *res)
                  * 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 int ip22_is_gr2(unsigned long addr)
 }
 
 
-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 @@ static void ip22_check_gio(int slotno, unsigned long addr)
         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 @@ static void ip22_check_gio(int slotno, unsigned long addr)
                 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 @@ int __init ip22_gio_init(void)
                 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);
diff --git a/arch/mips/sgi-ip22/ip22-int.c b/arch/mips/sgi-ip22/ip22-int.c
index 58b40ae59335..c66889fc4913 100644
--- a/arch/mips/sgi-ip22/ip22-int.c
+++ b/arch/mips/sgi-ip22/ip22-int.c
@@ -119,9 +119,14 @@ static void indy_local0_irqdispatch(void)
         } else
                 irq = lc0msk_to_irqnr[mask];
 
-        /* if irq == 0, then the interrupt has already been cleared */
+        /*
+         * workaround for INT2 bug; if irq == 0, INT2 has seen a fifo full
+         * irq, but failed to latch it into status register
+         */
         if (irq)
                 do_IRQ(irq);
+        else
+                do_IRQ(SGINT_LOCAL0 + 0);
 }
 
 static void indy_local1_irqdispatch(void)