2  * arch/m68k/atari/ataints.c -- Atari Linux interrupt handling code
5  *  Added support for TT interrupts; setup for TT SCU (may someone has
6  *  twiddled there and we won't get the right interrupts :-()
8  *  Major change: The device-independent code in m68k/ints.c didn't know
9  *  about non-autovec ints yet. It hardcoded the number of possible ints to
10  *  7 (IRQ1...IRQ7). But the Atari has lots of non-autovec ints! I made the
16  * 1995-07-16 Lars Brinkhoff <f93labr@dd.chalmers.se>:
27  * 1996-09-03 lars brinkhoff <f93labr@dd.chalmers.se>:
59  * --------------------------------
62  * <asm/atariints.h>): Autovector interrupts are 1..7, then follow ST-MFP,
63  * TT-MFP, SCC, and finally VME interrupts. Vector numbers for the latter can
75  * HBL IRQ handler for Falcon. Nobody needs it :-)
87 	unsigned int irq = data->irq;  in atari_irq_startup()
97 	unsigned int irq = data->irq;  in atari_irq_shutdown()
109 	atari_enable_irq(data->irq);  in atari_irq_enable()
114 	atari_disable_irq(data->irq);  in atari_irq_disable()
126  * ST-MFP timer D chained interrupts - each driver gets its own timer
150 	mach_irq = base->mfptimer_irq;  in mfp_timer_d_handler()
151 	ints = base->int_mask;  in mfp_timer_d_handler()
162 	int mfp_num = data->irq - IRQ_MFP_TIMER1;  in atari_mfptimer_enable()
169 	int mfp_num = data->irq - IRQ_MFP_TIMER1;  in atari_mfptimer_disable()
186  * Possibly need this mapped on demand anyway -
195 	int enat_num = 140 - data->irq + 1;  in atari_ethernat_startup()
204 	 * do _not_ enable the USB chip interrupt here - causes interrupt storm  in atari_ethernat_startup()
206 	 * Need to reset the USB chip to a sane state in early startup before  in atari_ethernat_startup()
217 	int enat_num = 140 - data->irq + 1;  in atari_ethernat_enable()
228 	int enat_num = 140 - data->irq + 1;  in atari_ethernat_disable()
239 	int enat_num = 140 - data->irq + 1;  in atari_ethernat_shutdown()
268 	m68k_setup_user_interrupt(VEC_USER, NUM_ATARI_SOURCES - IRQ_USER);  in atari_init_IRQ()
270 				  NUM_ATARI_SOURCES - 1);  in atari_init_IRQ()
275 	st_mfp.vec_adr  = 0x48;	/* Software EOI-Mode */  in atari_init_IRQ()
277 	st_mfp.vec_adr  = 0x40;	/* Automatic EOI-Mode */  in atari_init_IRQ()
279 	st_mfp.int_en_a = 0x00;	/* turn off MFP-Ints */  in atari_init_IRQ()
286 		tt_mfp.vec_adr  = 0x58;		/* Software EOI-Mode */  in atari_init_IRQ()
288 		tt_mfp.vec_adr  = 0x50;		/* Automatic EOI-Mode */  in atari_init_IRQ()
290 		tt_mfp.int_en_a = 0x00;		/* turn off MFP-Ints */  in atari_init_IRQ()
302 	if (ATARIHW_PRESENT(SCU)) {  in atari_init_IRQ()
303 		/* init the SCU if present */  in atari_init_IRQ()
307 		/* If no SCU and no Hades, the HSYNC interrupt needs to be  in atari_init_IRQ()
336 	/* set Timer D data Register - needs to be > 0 */  in atari_init_IRQ()
380 		irq -= VME_SOURCE_BASE;  in atari_unregister_vme_int()