kernel/git/stable/linux.git/arch/m68k/atari/ataints.c, branch master

m68k: atari: Fix TT bootup freeze / unexpected (SCU) interrupt messages

2024-07-01T12:23:05+00:00

Avoid freeze on Atari TT / MegaSTe boot with continuous messages of: unexpected interrupt from 112 Which was due to VBL interrupt being enabled in SCU sys mask, but there being no handler for that any more. (Bug and fix were first verified on real Atari TT HW by Christian, this patch later on in Hatari emulator.) Fixes: 1fa0b29f3a43f9dd ("fbdev: Kill Atari vblank cursor blinking") Reported-by: Nicolas Pomarède Closes: https://listengine.tuxfamily.org/lists.tuxfamily.org/hatari-devel/2024/06/msg00016.html Closes: https://lore.kernel.org/all/9aa793d7-82ed-4fbd-bce5-60810d8a9119@helsinkinet.fi Tested-by: Christian Zietz Signed-off-by: Eero Tamminen Reviewed-by: Michael Schmitz Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/20240624144901.5236-1-oak@helsinkinet.fi Signed-off-by: Geert Uytterhoeven

m68k: atari: Add and use "atari.h"

2023-10-06T08:03:02+00:00

When building with W=1: arch/m68k/atari/time.c:59:1: warning: no previous prototype for ‘atari_sched_init’ [-Wmissing-prototypes] 59 | atari_sched_init(void) | ^~~~~~~~~~~~~~~~ arch/m68k/atari/time.c:140:5: warning: no previous prototype for ‘atari_mste_hwclk’ [-Wmissing-prototypes] 140 | int atari_mste_hwclk( int op, struct rtc_time *t ) | ^~~~~~~~~~~~~~~~ arch/m68k/atari/time.c:199:5: warning: no previous prototype for ‘atari_tt_hwclk’ [-Wmissing-prototypes] 199 | int atari_tt_hwclk( int op, struct rtc_time *t ) | ^~~~~~~~~~~~~~ arch/m68k/atari/ataints.c:267:13: warning: no previous prototype for ‘atari_init_IRQ’ [-Wmissing-prototypes] 267 | void __init atari_init_IRQ(void) | ^~~~~~~~~~~~~~ arch/m68k/atari/atasound.c:36:6: warning: no previous prototype for ‘atari_microwire_cmd’ [-Wmissing-prototypes] 36 | void atari_microwire_cmd (int cmd) | ^~~~~~~~~~~~~~~~~~~ arch/m68k/atari/atasound.c:53:6: warning: no previous prototype for ‘atari_mksound’ [-Wmissing-prototypes] 53 | void atari_mksound (unsigned int hz, unsigned int ticks) | ^~~~~~~~~~~~~ Fix this by introducing a new header file "atari.h" for holding the prototypes of functions implemented in arch/m68k/atari/. Signed-off-by: Geert Uytterhoeven Acked-by: Arnd Bergmann Link: https://lore.kernel.org/r/336e4a478ccbfd7e3e91cdbd27636947587a23a6.1694613528.git.geert@linux-m68k.org

m68k: Call timer_interrupt() with interrupts disabled

2019-03-25T09:22:24+00:00

Some platforms execute their timer handler with the interrupt priority level set below 6. That means the handler could be interrupted by another driver and this could lead to re-entry of the timer core. Avoid this by use of local_irq_save/restore for timer interrupt dispatch. This provides mutual exclusion around the timer interrupt flag access which is needed later in this series for the clocksource conversion. Reported-by: Thomas Gleixner Link: http://lkml.kernel.org/r/alpine.DEB.2.21.1811131407120.2697@nanos.tec.linutronix.de Signed-off-by: Finn Thain Signed-off-by: Geert Uytterhoeven

m68k: atari: Fix the last kernel_stat.h fallout

2014-03-20T11:40:30+00:00

Reported-by: Ingo Molnar Signed-off-by: Thomas Gleixner

m68k/irq - Use polled IRQ flag for MFP timer cascaded interrupts

2014-01-13T08:29:10+00:00

Some Atari hardware has no capacity to raise interrupts (e.g. network or USB adapter hardware attached via ROM port). The driver interrupt routine is called from a timer interrupt (timer D) in these cases, using chained device specific pseudo interrupts (IRQ_MFP_TIMER1 ff.) These interrupts will more often than not, return IRQ_NONE as there is not always work for the device handler when called. Too many unhandled interrupts will result in the interrupt being disabled by the stuck interrupt watchdog. As preferred option to flag interrupts as needing exclusion from the watchdog mechanism, tglx added the IRQ_IS_POLLED flag for use in such a case. Currently, two interrupts need to use this flag. Add more users as needed. Signed-off-by: Michael Schmitz Signed-off-by: Geert Uytterhoeven

m68k/atari: EtherNAT - add interrupt chip definition for CPLD interrupts

2013-04-16T19:35:39+00:00

Add a dedicated interrupt chip definition for the EtherNAT CPLD interrupts. SMC91C111 and ISP1160 chips have separate interrupts that can be enabled and disabled in a CPLD register at offset 0x23 from the card base. Note the CPLD interrupt control register is mapped on demand, whenever any interrupt enable/disable action is requested. The EtherNAT USB driver still needs interrupts disabled around reset and start actions. In particular, we cannot entirely rely on the irq_startup being called first. The smc91x and isp116x-hcd drivers will use this feature. Signed-off-by: Michael Schmitz Signed-off-by: Geert Uytterhoeven

m68k/atari: use dedicated irq_chip for timer D interrupts

2013-04-16T19:09:21+00:00

Add a special irq_chip for the Atari MFP timer D interrupt, which is used as a polling timer for EtherNEC and NetUSBee Signed-off-by: Michael Schmitz Signed-off-by: Geert Uytterhoeven

m68k/atari: Change VME irq numbers from unsigned long to unsigned int

2012-04-22T18:16:49+00:00

Device interrupts numbers were changed to unsigned int in 1997, the year IRQ_MACHSPEC was killed as well. Also kill a related cast while we're at it. Signed-off-by: Geert Uytterhoeven Cc: netdev@vger.kernel.org

Disintegrate asm/system.h for M68K

2012-03-28T17:30:02+00:00

Disintegrate asm/system.h for M68K. Signed-off-by: David Howells Acked-by: Greg Ungerer cc: linux-m68k@lists.linux-m68k.org

m68k/atari: Move declaration of atari_SCC_reset_done to header file

2011-12-10T18:52:49+00:00

Signed-off-by: Geert Uytterhoeven