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Subject[PATCH 2/4] m68k/mac: Disentangle VIA and OSS initialization
Date
macintosh_config->via_type is meaningless on Mac IIfx (i.e. the only
model with OSS chip), so skip the via_type switch statement.

Call oss_init() before via_init() because it is more important and
because that is the right place to initialize the oss_present flag.

On this model, bringing forward oss_init() and delaying via_init()
is no problem because those functions are independent.

The only requirement here is that oss_register_interrupts() happens
after via_init(). That is, mac_init_IRQ() happens after config_mac().

Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
---
arch/m68k/mac/config.c | 2 +-
arch/m68k/mac/oss.c | 8 ++++----
arch/m68k/mac/via.c | 32 +++++++++++++-------------------
3 files changed, 18 insertions(+), 24 deletions(-)

diff --git a/arch/m68k/mac/config.c b/arch/m68k/mac/config.c
index 22123f7e8f75..16cd5cea5207 100644
--- a/arch/m68k/mac/config.c
+++ b/arch/m68k/mac/config.c
@@ -898,8 +898,8 @@ static void __init mac_identify(void)
mac_bi_data.id, mac_bi_data.cpuid, mac_bi_data.memsize);

iop_init();
- via_init();
oss_init();
+ via_init();
psc_init();
baboon_init();

diff --git a/arch/m68k/mac/oss.c b/arch/m68k/mac/oss.c
index ca84dcf41fc9..61906eb67d0f 100644
--- a/arch/m68k/mac/oss.c
+++ b/arch/m68k/mac/oss.c
@@ -31,18 +31,18 @@ volatile struct mac_oss *oss;

/*
* Initialize the OSS
- *
- * The OSS "detection" code is actually in via_init() which is always called
- * before us. Thus we can count on oss_present being valid on entry.
*/

void __init oss_init(void)
{
int i;

- if (!oss_present) return;
+ if (macintosh_config->ident != MAC_MODEL_IIFX)
+ return;

oss = (struct mac_oss *) OSS_BASE;
+ pr_debug("OSS detected at %p", oss);
+ oss_present = 1;

/* Disable all interrupts. Unlike a VIA it looks like we */
/* do this by setting the source's interrupt level to zero. */
diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c
index 05021381af0b..19ad46ba4787 100644
--- a/arch/m68k/mac/via.c
+++ b/arch/m68k/mac/via.c
@@ -113,10 +113,6 @@ void via_debug_dump(void);
* First we figure out where they actually _are_ as well as what type of
* VIA we have for VIA2 (it could be a real VIA or an RBV or even an OSS.)
* Then we pretty much clear them out and disable all IRQ sources.
- *
- * Note: the OSS is actually "detected" here and not in oss_init(). It just
- * seems more logical to do it here since via_init() needs to know
- * these things anyways.
*/

void __init via_init(void)
@@ -124,21 +120,18 @@ void __init via_init(void)
via1 = (void *)VIA1_BASE;
pr_debug("VIA1 detected at %p\n", via1);

- switch(macintosh_config->via_type) {
+ if (oss_present) {
+ via2 = NULL;
+ rbv_present = 0;
+ } else {
+ switch (macintosh_config->via_type) {

/* IIci, IIsi, IIvx, IIvi (P6xx), LC series */

case MAC_VIA_IICI:
- if (macintosh_config->ident == MAC_MODEL_IIFX) {
- via2 = NULL;
- rbv_present = 0;
- oss_present = 1;
- } else {
- via2 = (void *) RBV_BASE;
- pr_debug("VIA2 (RBV) detected at %p\n", via2);
- rbv_present = 1;
- oss_present = 0;
- }
+ via2 = (void *)RBV_BASE;
+ pr_debug("VIA2 (RBV) detected at %p\n", via2);
+ rbv_present = 1;
if (macintosh_config->ident == MAC_MODEL_LCIII) {
rbv_clear = 0x00;
} else {
@@ -160,15 +153,16 @@ void __init via_init(void)
via2 = (void *) VIA2_BASE;
pr_debug("VIA2 detected at %p\n", via2);
rbv_present = 0;
- oss_present = 0;
rbv_clear = 0x00;
gIER = vIER;
gIFR = vIFR;
gBufA = vBufA;
gBufB = vBufB;
break;
+
default:
panic("UNKNOWN VIA TYPE");
+ }
}

#ifdef DEBUG_VIA
@@ -295,9 +289,9 @@ void via_debug_dump(void)
(uint) via1[vDirA], (uint) via1[vDirB], (uint) via1[vACR]);
printk(KERN_DEBUG " PCR = 0x%02X IFR = 0x%02X IER = 0x%02X\n",
(uint) via1[vPCR], (uint) via1[vIFR], (uint) via1[vIER]);
- if (oss_present) {
- printk(KERN_DEBUG "VIA2: <OSS>\n");
- } else if (rbv_present) {
+ if (!via2)
+ return;
+ if (rbv_present) {
printk(KERN_DEBUG "VIA2: IFR = 0x%02X IER = 0x%02X\n",
(uint) via2[rIFR], (uint) via2[rIER]);
printk(KERN_DEBUG " SIFR = 0x%02X SIER = 0x%02X\n",
--
2.13.6
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