9e09d05cfe
- More printk modernization, - Various cleanups and fixes (incl. a race condition) for Mac, - Defconfig updates. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJaCVjAAAoJEEgEtLw/Ve77REQQAK/cc/6wM6/X2gAYgBucSNkH qtI4jvwYtuezhzWRCq/Jb6KNljkq/QutpGsoRGJdxLyAOGTsRj7+6+issCKjnznu ESiLWLcttGjAPRQKM1OEP/KuyOKDT4EHARoTKFNxV4ld76Emh866YS9mBpYNpVzt Z+rNIrB69iCUlczlqzavKqfhz7jFeuTyQBrwV8K4mG+x2mCnDgIE3rMF9HwPWoyj C8dQnpdOJ7vB9iaLD3CLip5Ddqve8PXRU4y1vkspseriADPsaFBBTmJdMQtMhE8g ynx8ATowOk/vpNqq+G63GZGHoEIhmfECaXm0lcnt0P3cdYAkz5wFIRrP/O9lglUL M6ygVFAca/gsiYQfXmZ8wPo/9UYltUn0ZPHhKLckjJJH3GmlQJ2cKkHcrugMF3kN oz2T3ltSqxEj/EetXBWx3o+XtIfIR1kbgulcJhARTptOczhfPRN0k/A6PHKz7JKf el2gNubB8RUakL7SyICYmf8mKw2++VIipQn1yU6bnzA6nEDNX10ifo3W0aJRTfDb C71GmR76UBZ8bcbP4iomlrO9UHzd2FKy+sOtgIkPXmsRi2g8AJYLoEqwNmsLbl7n CHm66bbzfZWnE9X7FfJLekMxMVP/TRWVctl7aYeUB2ilddEnw74xHRB4j3YS388V U00CtU2+2zp40tIj5o0/ =cuxe -----END PGP SIGNATURE----- Merge tag 'm68k-for-v4.15-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k Pull m68k updates from Geert Uytterhoeven: - more printk modernization - various cleanups and fixes (incl. a race condition) for Mac - defconfig updates * tag 'm68k-for-v4.15-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k/defconfig: Update defconfigs for v4.14-rc7 m68k/mac: Add mutual exclusion for IOP interrupt polling m68k/mac: Disentangle VIA/RBV and NuBus initialization m68k/mac: Disentangle VIA and OSS initialization m68k/mac: More printk modernization
99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Baboon Custom IC Management
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*
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* The Baboon custom IC controls the IDE, PCMCIA and media bay on the
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* PowerBook 190. It multiplexes multiple interrupt sources onto the
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* Nubus slot $C interrupt.
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/irq.h>
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#include <asm/macintosh.h>
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#include <asm/macints.h>
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#include <asm/mac_baboon.h>
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int baboon_present;
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static volatile struct baboon *baboon;
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#if 0
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extern int macide_ack_intr(struct ata_channel *);
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#endif
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/*
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* Baboon initialization.
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*/
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void __init baboon_init(void)
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{
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if (macintosh_config->ident != MAC_MODEL_PB190) {
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baboon = NULL;
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baboon_present = 0;
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return;
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}
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baboon = (struct baboon *) BABOON_BASE;
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baboon_present = 1;
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pr_debug("Baboon detected at %p\n", baboon);
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}
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/*
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* Baboon interrupt handler. This works a lot like a VIA.
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*/
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static void baboon_irq(struct irq_desc *desc)
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{
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int irq_bit, irq_num;
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unsigned char events;
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events = baboon->mb_ifr & 0x07;
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if (!events)
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return;
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irq_num = IRQ_BABOON_0;
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irq_bit = 1;
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do {
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if (events & irq_bit) {
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baboon->mb_ifr &= ~irq_bit;
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generic_handle_irq(irq_num);
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}
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irq_bit <<= 1;
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irq_num++;
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} while(events >= irq_bit);
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#if 0
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if (baboon->mb_ifr & 0x02) macide_ack_intr(NULL);
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/* for now we need to smash all interrupts */
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baboon->mb_ifr &= ~events;
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#endif
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}
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/*
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* Register the Baboon interrupt dispatcher on nubus slot $C.
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*/
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void __init baboon_register_interrupts(void)
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{
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irq_set_chained_handler(IRQ_NUBUS_C, baboon_irq);
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}
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/*
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* The means for masking individual Baboon interrupts remains a mystery.
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* However, since we only use the IDE IRQ, we can just enable/disable all
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* Baboon interrupts. If/when we handle more than one Baboon IRQ, we must
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* either figure out how to mask them individually or else implement the
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* same workaround that's used for NuBus slots (see nubus_disabled and
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* via_nubus_irq_shutdown).
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*/
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void baboon_irq_enable(int irq)
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{
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mac_irq_enable(irq_get_irq_data(IRQ_NUBUS_C));
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}
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void baboon_irq_disable(int irq)
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{
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mac_irq_disable(irq_get_irq_data(IRQ_NUBUS_C));
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}
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