2008-04-29 03:24:33 +04:00
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/*
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* cx18 interrupt handling
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*
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* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
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2010-05-24 01:53:35 +04:00
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* Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>
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2008-04-29 03:24:33 +04:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "cx18-driver.h"
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2008-08-30 23:03:44 +04:00
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#include "cx18-io.h"
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2008-04-29 03:24:33 +04:00
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#include "cx18-irq.h"
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#include "cx18-mailbox.h"
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#include "cx18-scb.h"
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2008-11-05 04:02:23 +03:00
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static void xpu_ack(struct cx18 *cx, u32 sw2)
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{
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if (sw2 & IRQ_CPU_TO_EPU_ACK)
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wake_up(&cx->mb_cpu_waitq);
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if (sw2 & IRQ_APU_TO_EPU_ACK)
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wake_up(&cx->mb_apu_waitq);
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2008-04-29 03:24:33 +04:00
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}
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2008-11-16 07:38:19 +03:00
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static void epu_cmd(struct cx18 *cx, u32 sw1)
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{
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if (sw1 & IRQ_CPU_TO_EPU)
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cx18_api_epu_cmd_irq(cx, CPU);
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if (sw1 & IRQ_APU_TO_EPU)
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cx18_api_epu_cmd_irq(cx, APU);
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}
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2008-04-29 03:24:33 +04:00
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irqreturn_t cx18_irq_handler(int irq, void *dev_id)
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{
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struct cx18 *cx = (struct cx18 *)dev_id;
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2008-11-18 04:48:46 +03:00
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u32 sw1, sw2, hw2;
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2008-04-29 03:24:33 +04:00
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2008-11-18 04:48:46 +03:00
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sw1 = cx18_read_reg(cx, SW1_INT_STATUS) & cx->sw1_irq_mask;
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sw2 = cx18_read_reg(cx, SW2_INT_STATUS) & cx->sw2_irq_mask;
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hw2 = cx18_read_reg(cx, HW2_INT_CLR_STATUS) & cx->hw2_irq_mask;
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2008-04-29 03:24:33 +04:00
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2008-11-01 02:49:12 +03:00
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if (sw1)
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cx18_write_reg_expect(cx, sw1, SW1_INT_STATUS, ~sw1, sw1);
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if (sw2)
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cx18_write_reg_expect(cx, sw2, SW2_INT_STATUS, ~sw2, sw2);
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if (hw2)
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cx18_write_reg_expect(cx, hw2, HW2_INT_CLR_STATUS, ~hw2, hw2);
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2008-04-29 03:24:33 +04:00
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if (sw1 || sw2 || hw2)
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[media] cx18: don't break long lines
Due to the 80-cols restrictions, and latter due to checkpatch
warnings, several strings were broken into multiple lines. This
is not considered a good practice anymore, as it makes harder
to grep for strings at the source code.
As we're right now fixing other drivers due to KERN_CONT, we need
to be able to identify what printk strings don't end with a "\n".
It is a way easier to detect those if we don't break long lines.
So, join those continuation lines.
The patch was generated via the script below, and manually
adjusted if needed.
</script>
use Text::Tabs;
while (<>) {
if ($next ne "") {
$c=$_;
if ($c =~ /^\s+\"(.*)/) {
$c2=$1;
$next =~ s/\"\n$//;
$n = expand($next);
$funpos = index($n, '(');
$pos = index($c2, '",');
if ($funpos && $pos > 0) {
$s1 = substr $c2, 0, $pos + 2;
$s2 = ' ' x ($funpos + 1) . substr $c2, $pos + 2;
$s2 =~ s/^\s+//;
$s2 = ' ' x ($funpos + 1) . $s2 if ($s2 ne "");
print unexpand("$next$s1\n");
print unexpand("$s2\n") if ($s2 ne "");
} else {
print "$next$c2\n";
}
$next="";
next;
} else {
print $next;
}
$next="";
} else {
if (m/\"$/) {
if (!m/\\n\"$/) {
$next=$_;
next;
}
}
}
print $_;
}
</script>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-10-18 22:44:03 +03:00
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CX18_DEBUG_HI_IRQ("received interrupts SW1: %x SW2: %x HW2: %x\n",
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sw1, sw2, hw2);
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2008-04-29 03:24:33 +04:00
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2008-11-16 07:38:19 +03:00
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/*
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* SW1 responses have to happen first. The sending XPU times out the
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* incoming mailboxes on us rather rapidly.
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*/
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if (sw1)
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epu_cmd(cx, sw1);
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2008-04-29 03:24:33 +04:00
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/* To do: interrupt-based I2C handling
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2008-11-05 04:02:23 +03:00
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if (hw2 & (HW2_I2C1_INT|HW2_I2C2_INT)) {
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2008-04-29 03:24:33 +04:00
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}
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*/
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2008-11-05 04:02:23 +03:00
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if (sw2)
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xpu_ack(cx, sw2);
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2008-04-29 03:24:33 +04:00
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2008-11-01 02:49:12 +03:00
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return (sw1 || sw2 || hw2) ? IRQ_HANDLED : IRQ_NONE;
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2008-04-29 03:24:33 +04:00
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}
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