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[PATCH] IP27: misc fixes

To: linux-mips@linux-mips.org
Subject: [PATCH] IP27: misc fixes
From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date: Thu, 17 Apr 2008 22:07:42 +0200 (CEST)
Cc: ralf@linux-mips.org
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
- fix PCI interrupt assignment by emulating ioc3 interrupt pin register
- use pci_probe_only mode
- select correct page size in bridge
- remove no longer needed ioc3_sio_init() code

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---

 arch/mips/pci/ops-bridge.c     |   20 ++++++++++++++++++--
 arch/mips/pci/pci-ip27.c       |   10 ++++++++++
 arch/mips/sgi-ip27/ip27-init.c |   22 ----------------------
 3 files changed, 28 insertions(+), 24 deletions(-)

diff --git a/arch/mips/pci/ops-bridge.c b/arch/mips/pci/ops-bridge.c
index 1fa0992..b46b3e2 100644
--- a/arch/mips/pci/ops-bridge.c
+++ b/arch/mips/pci/ops-bridge.c
@@ -14,6 +14,22 @@
 #include <asm/sn/sn0/hub.h>
 
 /*
+ * Most of the IOC3 PCI config register aren't present
+ * we emulate what is needed for a normal PCI enumeration
+ */
+static u32 emulate_ioc3_cfg(int where, int size)
+{
+       if (size == 1 && where == 0x3d)
+               return 0x01;
+       else if (size == 2 && where == 0x3c)
+               return 0x0100;
+       else if (size == 4 && where == 0x3c)
+               return 0x00000100;
+
+       return 0;
+}
+
+/*
  * The Bridge ASIC supports both type 0 and type 1 access.  Type 1 is
  * not really documented, so right now I can't write code which uses it.
  * Therefore we use type 0 accesses for now even though they won't work
@@ -64,7 +80,7 @@ oh_my_gawd:
         * generic PCI code a chance to look at the wrong register.
         */
        if ((where >= 0x14 && where < 0x40) || (where >= 0x48)) {
-               *value = 0;
+               *value = emulate_ioc3_cfg(where, size);
                return PCIBIOS_SUCCESSFUL;
        }
 
@@ -127,7 +143,7 @@ oh_my_gawd:
         * generic PCI code a chance to look at the wrong register.
         */
        if ((where >= 0x14 && where < 0x40) || (where >= 0x48)) {
-               *value = 0;
+               *value = emulate_ioc3_cfg(where, size);
                return PCIBIOS_SUCCESSFUL;
        }
 
diff --git a/arch/mips/pci/pci-ip27.c b/arch/mips/pci/pci-ip27.c
index bb64828..b8a28b5 100644
--- a/arch/mips/pci/pci-ip27.c
+++ b/arch/mips/pci/pci-ip27.c
@@ -47,6 +47,9 @@ int __cpuinit bridge_probe(nasid_t nasid, int widget_id, int 
masterwid)
        static int num_bridges = 0;
        bridge_t *bridge;
        int slot;
+       extern int pci_probe_only;
+
+       pci_probe_only = 1;
 
        printk("a bridge\n");
 
@@ -100,6 +103,13 @@ int __cpuinit bridge_probe(nasid_t nasid, int widget_id, 
int masterwid)
         */
        bridge->b_wid_control |= BRIDGE_CTRL_IO_SWAP |
                                 BRIDGE_CTRL_MEM_SWAP;
+#ifdef CONFIG_PAGE_SIZE_4KB
+       bridge->b_wid_control &= ~BRIDGE_CTRL_PAGE_SIZE;
+#elif defined(CONFIG_PAGE_SIZE_16KB)
+       bridge->b_wid_control |= BRIDGE_CTRL_PAGE_SIZE;
+#else
+#error Fixme for page size other than 4kB and 16kB
+#endif
 
        /*
         * Hmm...  IRIX sets additional bits in the address which
diff --git a/arch/mips/sgi-ip27/ip27-init.c b/arch/mips/sgi-ip27/ip27-init.c
index 7093e7c..4a500e8 100644
--- a/arch/mips/sgi-ip27/ip27-init.c
+++ b/arch/mips/sgi-ip27/ip27-init.c
@@ -161,27 +161,6 @@ cnodeid_t get_compact_nodeid(void)
        return NASID_TO_COMPACT_NODEID(get_nasid());
 }
 
-/* Extracted from the IOC3 meta driver.  FIXME.  */
-static inline void ioc3_sio_init(void)
-{
-       struct ioc3 *ioc3;
-       nasid_t nid;
-       long loops;
-
-       nid = get_nasid();
-       ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
-
-       ioc3->sscr_a = 0;                       /* PIO mode for uarta.  */
-       ioc3->sscr_b = 0;                       /* PIO mode for uartb.  */
-       ioc3->sio_iec = ~0;
-       ioc3->sio_ies = (SIO_IR_SA_INT | SIO_IR_SB_INT);
-
-       loops=1000000; while(loops--);
-       ioc3->sregs.uarta.iu_fcr = 0;
-       ioc3->sregs.uartb.iu_fcr = 0;
-       loops=1000000; while(loops--);
-}
-
 static inline void ioc3_eth_init(void)
 {
        struct ioc3 *ioc3;
@@ -234,7 +213,6 @@ void __init plat_mem_setup(void)
                panic("Kernel compiled for N mode.");
 #endif
 
-       ioc3_sio_init();
        ioc3_eth_init();
        per_cpu_init();
 

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