[src/trunk]: src/sys/arch/macppc/pci first step to make genfb work with /chao...

[macallan <macallan%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/2218fd59a0fc
branches:  trunk
changeset: 816486:2218fd59a0fc
user:      macallan <macallan%NetBSD.org@localhost>
date:      Fri Jul 08 22:21:52 2016 +0000

description:
first step to make genfb work with /chaos/control - don't do config space
writes on /chaos.
tested by jak

diffstat:

 sys/arch/macppc/pci/bandit.c |  22 +++++++++++++++++++---
 1 files changed, 19 insertions(+), 3 deletions(-)

diffs (71 lines):

diff -r 0ffdad0498a9 -r 2218fd59a0fc sys/arch/macppc/pci/bandit.c
--- a/sys/arch/macppc/pci/bandit.c      Fri Jul 08 09:15:38 2016 +0000
+++ b/sys/arch/macppc/pci/bandit.c      Fri Jul 08 22:21:52 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bandit.c,v 1.31 2015/10/02 05:22:51 msaitoh Exp $      */
+/*     $NetBSD: bandit.c,v 1.32 2016/07/08 22:21:52 macallan Exp $     */
 
 /*-
  * Copyright (c) 2000 Tsubai Masanari.  All rights reserved.
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bandit.c,v 1.31 2015/10/02 05:22:51 msaitoh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bandit.c,v 1.32 2016/07/08 22:21:52 macallan Exp $");
 
 #include <sys/param.h>
 #include <sys/device.h>
@@ -46,6 +46,7 @@
        struct genppc_pci_chipset sc_pc;
        struct powerpc_bus_space sc_iot;
        struct powerpc_bus_space sc_memt;
+       boolean_t sc_is_chaos;
 };
 
 static void bandit_attach(device_t, device_t, void *);
@@ -53,6 +54,7 @@
 
 static pcireg_t bandit_conf_read(void *, pcitag_t, int);
 static void bandit_conf_write(void *, pcitag_t, int, pcireg_t);
+static void chaos_conf_write(void *, pcitag_t, int, pcireg_t);
 
 static void bandit_init(struct bandit_softc *);
 
@@ -89,6 +91,8 @@
        aprint_normal("\n");
        sc->sc_dev = self;
 
+       sc->sc_is_chaos = (strcmp(ca->ca_name, "chaos") == 0);
+
        /* Bandit address */
        if (OF_getprop(node, "reg", reg, sizeof(reg)) < 8)
                return;
@@ -131,7 +135,10 @@
        pc->pc_data = mapiodev(reg[0] + 0xc00000, 8, false);
        pc->pc_bus = busrange[0];
        pc->pc_conf_read = bandit_conf_read;
-       pc->pc_conf_write = bandit_conf_write;
+       if (sc->sc_is_chaos) {
+               pc->pc_conf_write = chaos_conf_write;
+       } else
+               pc->pc_conf_write = bandit_conf_write;
 
        bandit_init(sc);
 
@@ -225,6 +232,15 @@
        splx(s);
 }
 
+/*
+ * XXX
+ * /chaos really hates writes to config space, so we just don't do them
+ */
+static void
+chaos_conf_write(void *cookie, pcitag_t tag, int reg, pcireg_t data)
+{
+}
+
 #define        PCI_BANDIT              11
 
 #define        PCI_REG_MODE_SELECT     0x50