summaryrefslogtreecommitdiff
path: root/arch/m68k/mac
diff options
context:
space:
mode:
authorFinn Thain <fthain@telegraphics.com.au>2020-11-20 15:39:56 +1100
committerGeert Uytterhoeven <geert@linux-m68k.org>2020-11-23 11:30:51 +0100
commit266994e3ac78955f2f7f4ac3fe588002c7bd679c (patch)
tree9bbfd5fda862885e5bcb81b9167add524488c374 /arch/m68k/mac
parent8ae0b65ac7e5b7a93b8d6abc520351ca11d91867 (diff)
m68k: mac: Refactor iop_preinit() and iop_init()
The idea behind iop_preinit() was to put the SCC IOP into bypass mode. However, that remains unimplemented and implementing it would be difficult. Let the comments and code reflect this. Even if iop_preinit() worked as described in the comments, it gets called immediately before iop_init() so it might as well part of iop_init(). Cc: Joshua Thompson <funaho@jurai.org> Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Link: https://lore.kernel.org/r/0a7b09f5e5f48e270b82041c19e8f20f54c69216.1605847196.git.fthain@telegraphics.com.au Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/mac')
-rw-r--r--arch/m68k/mac/config.c8
-rw-r--r--arch/m68k/mac/iop.c54
2 files changed, 18 insertions, 44 deletions
diff --git a/arch/m68k/mac/config.c b/arch/m68k/mac/config.c
index eff442e932cf..36bbefe60117 100644
--- a/arch/m68k/mac/config.c
+++ b/arch/m68k/mac/config.c
@@ -55,7 +55,6 @@ struct mac_booter_data mac_bi_data;
static unsigned long mac_orig_videoaddr;
extern int mac_hwclk(int, struct rtc_time *);
-extern void iop_preinit(void);
extern void iop_init(void);
extern void via_init(void);
extern void via_init_clock(irq_handler_t func);
@@ -834,13 +833,6 @@ static void __init mac_identify(void)
break;
}
- /*
- * We need to pre-init the IOPs, if any. Otherwise
- * the serial console won't work if the user had
- * the serial ports set to "Faster" mode in MacOS.
- */
- iop_preinit();
-
pr_info("Detected Macintosh model: %d\n", model);
/*
diff --git a/arch/m68k/mac/iop.c b/arch/m68k/mac/iop.c
index c669a7644301..de156a027f5b 100644
--- a/arch/m68k/mac/iop.c
+++ b/arch/m68k/mac/iop.c
@@ -47,6 +47,10 @@
*
* TODO:
*
+ * o The SCC IOP has to be placed in bypass mode before the serial console
+ * gets initialized. iop_init() would be one place to do that. Or the
+ * bootloader could do that. For now, the Serial Switch control panel
+ * is needed for that -- contrary to the changelog above.
* o Something should be periodically checking iop_alive() to make sure the
* IOP hasn't died.
* o Some of the IOP manager routines need better error checking and
@@ -225,40 +229,6 @@ static struct iop_msg *iop_get_unused_msg(void)
}
/*
- * This is called by the startup code before anything else. Its purpose
- * is to find and initialize the IOPs early in the boot sequence, so that
- * the serial IOP can be placed into bypass mode _before_ we try to
- * initialize the serial console.
- */
-
-void __init iop_preinit(void)
-{
- if (macintosh_config->scc_type == MAC_SCC_IOP) {
- if (macintosh_config->ident == MAC_MODEL_IIFX) {
- iop_base[IOP_NUM_SCC] = (struct mac_iop *) SCC_IOP_BASE_IIFX;
- } else {
- iop_base[IOP_NUM_SCC] = (struct mac_iop *) SCC_IOP_BASE_QUADRA;
- }
- iop_scc_present = 1;
- } else {
- iop_base[IOP_NUM_SCC] = NULL;
- iop_scc_present = 0;
- }
- if (macintosh_config->adb_type == MAC_ADB_IOP) {
- if (macintosh_config->ident == MAC_MODEL_IIFX) {
- iop_base[IOP_NUM_ISM] = (struct mac_iop *) ISM_IOP_BASE_IIFX;
- } else {
- iop_base[IOP_NUM_ISM] = (struct mac_iop *) ISM_IOP_BASE_QUADRA;
- }
- iop_stop(iop_base[IOP_NUM_ISM]);
- iop_ism_present = 1;
- } else {
- iop_base[IOP_NUM_ISM] = NULL;
- iop_ism_present = 0;
- }
-}
-
-/*
* Initialize the IOPs, if present.
*/
@@ -266,11 +236,23 @@ void __init iop_init(void)
{
int i;
- if (iop_scc_present) {
+ if (macintosh_config->scc_type == MAC_SCC_IOP) {
+ if (macintosh_config->ident == MAC_MODEL_IIFX)
+ iop_base[IOP_NUM_SCC] = (struct mac_iop *)SCC_IOP_BASE_IIFX;
+ else
+ iop_base[IOP_NUM_SCC] = (struct mac_iop *)SCC_IOP_BASE_QUADRA;
+ iop_scc_present = 1;
pr_debug("SCC IOP detected at %p\n", iop_base[IOP_NUM_SCC]);
}
- if (iop_ism_present) {
+ if (macintosh_config->adb_type == MAC_ADB_IOP) {
+ if (macintosh_config->ident == MAC_MODEL_IIFX)
+ iop_base[IOP_NUM_ISM] = (struct mac_iop *)ISM_IOP_BASE_IIFX;
+ else
+ iop_base[IOP_NUM_ISM] = (struct mac_iop *)ISM_IOP_BASE_QUADRA;
+ iop_ism_present = 1;
pr_debug("ISM IOP detected at %p\n", iop_base[IOP_NUM_ISM]);
+
+ iop_stop(iop_base[IOP_NUM_ISM]);
iop_start(iop_base[IOP_NUM_ISM]);
iop_alive(iop_base[IOP_NUM_ISM]); /* clears the alive flag */
}