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author | Finn Thain <fthain@telegraphics.com.au> | 2020-11-20 15:39:56 +1100 |
---|---|---|
committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2020-11-23 11:30:51 +0100 |
commit | 266994e3ac78955f2f7f4ac3fe588002c7bd679c (patch) | |
tree | 9bbfd5fda862885e5bcb81b9167add524488c374 /arch/m68k | |
parent | 8ae0b65ac7e5b7a93b8d6abc520351ca11d91867 (diff) | |
download | linux-266994e3ac78955f2f7f4ac3fe588002c7bd679c.tar.gz linux-266994e3ac78955f2f7f4ac3fe588002c7bd679c.tar.bz2 linux-266994e3ac78955f2f7f4ac3fe588002c7bd679c.zip |
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')
-rw-r--r-- | arch/m68k/mac/config.c | 8 | ||||
-rw-r--r-- | arch/m68k/mac/iop.c | 54 |
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 */ } |