R0dn3yS/android_kernel_xiaomi_sm7250
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
9aaeded72f
android_kernel_xiaomi_sm7250/arch/sh/boards/superh/microdev/irq.c
Ingo Molnar d1bef4ed5f [PATCH] genirq: rename desc->handler to desc->chip 
This patch-queue improves the generic IRQ layer to be truly generic, by adding
various abstractions and features to it, without impacting existing
functionality.

While the queue can be best described as "fix and improve everything in the
generic IRQ layer that we could think of", and thus it consists of many
smaller features and lots of cleanups, the one feature that stands out most is
the new 'irq chip' abstraction.

The irq-chip abstraction is about describing and coding and IRQ controller
driver by mapping its raw hardware capabilities [and quirks, if needed] in a
straightforward way, without having to think about "IRQ flow"
(level/edge/etc.) type of details.

This stands in contrast with the current 'irq-type' model of genirq
architectures, which 'mixes' raw hardware capabilities with 'flow' details.
The patchset supports both types of irq controller designs at once, and
converts i386 and x86_64 to the new irq-chip design.

As a bonus side-effect of the irq-chip approach, chained interrupt controllers
(master/slave PIC constructs, etc.) are now supported by design as well.

The end result of this patchset intends to be simpler architecture-level code
and more consolidation between architectures.

We reused many bits of code and many concepts from Russell King's ARM IRQ
layer, the merging of which was one of the motivations for this patchset.

This patch:

rename desc->handler to desc->chip.

Originally i did not want to do this, because it's a big patch.  But having
both "desc->handler", "desc->handle_irq" and "action->handler" caused a
large degree of confusion and made the code appear alot less clean than it
truly is.

I have also attempted a dual approach as well by introducing a
desc->chip alias - but that just wasnt robust enough and broke
frequently.

So lets get over with this quickly.  The conversion was done automatically
via scripts and converts all the code in the kernel.

This renaming patch is the first one amongst the patches, so that the
remaining patches can stay flexible and can be merged and split up
without having some big monolithic patch act as a merge barrier.

[akpm@osdl.org: build fix]
[akpm@osdl.org: another build fix]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-29 10:26:21 -07:00

201 lines
6.0 KiB
C
Raw Blame History

/*
* arch/sh/boards/superh/microdev/irq.c
*
* Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
*
* SuperH SH4-202 MicroDev board support.
*
* May be copied or modified under the terms of the GNU General Public
* License. See linux/COPYING for more information.
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/microdev.h>
#define NUM_EXTERNAL_IRQS 16 /* IRL0 .. IRL15 */
static const struct {
unsigned char fpgaIrq;
unsigned char mapped;
const char *name;
} fpgaIrqTable[NUM_EXTERNAL_IRQS] = {
{ 0, 0, "unused" }, /* IRQ #0 IRL=15 0x200 */
{ MICRODEV_FPGA_IRQ_KEYBOARD, 1, "keyboard" }, /* IRQ #1 IRL=14 0x220 */
{ MICRODEV_FPGA_IRQ_SERIAL1, 1, "Serial #1"}, /* IRQ #2 IRL=13 0x240 */
{ MICRODEV_FPGA_IRQ_ETHERNET, 1, "Ethernet" }, /* IRQ #3 IRL=12 0x260 */
{ MICRODEV_FPGA_IRQ_SERIAL2, 0, "Serial #2"}, /* IRQ #4 IRL=11 0x280 */
{ 0, 0, "unused" }, /* IRQ #5 IRL=10 0x2a0 */
{ 0, 0, "unused" }, /* IRQ #6 IRL=9 0x2c0 */
{ MICRODEV_FPGA_IRQ_USB_HC, 1, "USB" }, /* IRQ #7 IRL=8 0x2e0 */
{ MICRODEV_IRQ_PCI_INTA, 1, "PCI INTA" }, /* IRQ #8 IRL=7 0x300 */
{ MICRODEV_IRQ_PCI_INTB, 1, "PCI INTB" }, /* IRQ #9 IRL=6 0x320 */
{ MICRODEV_IRQ_PCI_INTC, 1, "PCI INTC" }, /* IRQ #10 IRL=5 0x340 */
{ MICRODEV_IRQ_PCI_INTD, 1, "PCI INTD" }, /* IRQ #11 IRL=4 0x360 */
{ MICRODEV_FPGA_IRQ_MOUSE, 1, "mouse" }, /* IRQ #12 IRL=3 0x380 */
{ MICRODEV_FPGA_IRQ_IDE2, 1, "IDE #2" }, /* IRQ #13 IRL=2 0x3a0 */
{ MICRODEV_FPGA_IRQ_IDE1, 1, "IDE #1" }, /* IRQ #14 IRL=1 0x3c0 */
{ 0, 0, "unused" }, /* IRQ #15 IRL=0 0x3e0 */
};
#if (MICRODEV_LINUX_IRQ_KEYBOARD != 1)
# error Inconsistancy in defining the IRQ# for Keyboard!
#endif
#if (MICRODEV_LINUX_IRQ_ETHERNET != 3)
# error Inconsistancy in defining the IRQ# for Ethernet!
#endif
#if (MICRODEV_LINUX_IRQ_USB_HC != 7)
# error Inconsistancy in defining the IRQ# for USB!
#endif
#if (MICRODEV_LINUX_IRQ_MOUSE != 12)
# error Inconsistancy in defining the IRQ# for PS/2 Mouse!
#endif
#if (MICRODEV_LINUX_IRQ_IDE2 != 13)
# error Inconsistancy in defining the IRQ# for secondary IDE!
#endif
#if (MICRODEV_LINUX_IRQ_IDE1 != 14)
# error Inconsistancy in defining the IRQ# for primary IDE!
#endif
static void enable_microdev_irq(unsigned int irq);
static void disable_microdev_irq(unsigned int irq);
/* shutdown is same as "disable" */
#define shutdown_microdev_irq disable_microdev_irq
static void mask_and_ack_microdev(unsigned int);
static void end_microdev_irq(unsigned int irq);
static unsigned int startup_microdev_irq(unsigned int irq)
{
enable_microdev_irq(irq);
return 0; /* never anything pending */
}
static struct hw_interrupt_type microdev_irq_type = {
.typename = "MicroDev-IRQ",
.startup = startup_microdev_irq,
.shutdown = shutdown_microdev_irq,
.enable = enable_microdev_irq,
.disable = disable_microdev_irq,
.ack = mask_and_ack_microdev,
.end = end_microdev_irq
};
static void disable_microdev_irq(unsigned int irq)
{
unsigned int flags;
unsigned int fpgaIrq;
if (irq >= NUM_EXTERNAL_IRQS) return;
if (!fpgaIrqTable[irq].mapped) return;
fpgaIrq = fpgaIrqTable[irq].fpgaIrq;
/* disable interrupts */
local_irq_save(flags);
/* disable interupts on the FPGA INTC register */
ctrl_outl(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTDSB_REG);
/* restore interrupts */
local_irq_restore(flags);
}
static void enable_microdev_irq(unsigned int irq)
{
unsigned long priorityReg, priorities, pri;
unsigned int flags;
unsigned int fpgaIrq;
if (irq >= NUM_EXTERNAL_IRQS) return;
if (!fpgaIrqTable[irq].mapped) return;
pri = 15 - irq;
fpgaIrq = fpgaIrqTable[irq].fpgaIrq;
priorityReg = MICRODEV_FPGA_INTPRI_REG(fpgaIrq);
/* disable interrupts */
local_irq_save(flags);
/* set priority for the interrupt */
priorities = ctrl_inl(priorityReg);
priorities &= ~MICRODEV_FPGA_INTPRI_MASK(fpgaIrq);
priorities |= MICRODEV_FPGA_INTPRI_LEVEL(fpgaIrq, pri);
ctrl_outl(priorities, priorityReg);
/* enable interupts on the FPGA INTC register */
ctrl_outl(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTENB_REG);
/* restore interrupts */
local_irq_restore(flags);
}
/* This functions sets the desired irq handler to be a MicroDev type */
static void __init make_microdev_irq(unsigned int irq)
{
disable_irq_nosync(irq);
irq_desc[irq].chip = &microdev_irq_type;
disable_microdev_irq(irq);
}
static void mask_and_ack_microdev(unsigned int irq)
{
disable_microdev_irq(irq);
}
static void end_microdev_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
{
enable_microdev_irq(irq);
}
}
extern void __init init_microdev_irq(void)
{
int i;
/* disable interupts on the FPGA INTC register */
ctrl_outl(~0ul, MICRODEV_FPGA_INTDSB_REG);
for (i = 0; i < NUM_EXTERNAL_IRQS; i++)
{
make_microdev_irq(i);
}
}
extern void microdev_print_fpga_intc_status(void)
{
volatile unsigned int * const intenb = (unsigned int*)MICRODEV_FPGA_INTENB_REG;
volatile unsigned int * const intdsb = (unsigned int*)MICRODEV_FPGA_INTDSB_REG;
volatile unsigned int * const intpria = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(0);
volatile unsigned int * const intprib = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(8);
volatile unsigned int * const intpric = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(16);
volatile unsigned int * const intprid = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(24);
volatile unsigned int * const intsrc = (unsigned int*)MICRODEV_FPGA_INTSRC_REG;
volatile unsigned int * const intreq = (unsigned int*)MICRODEV_FPGA_INTREQ_REG;
printk("-------------------------- microdev_print_fpga_intc_status() ------------------\n");
printk("FPGA_INTENB = 0x%08x\n", *intenb);
printk("FPGA_INTDSB = 0x%08x\n", *intdsb);
printk("FPGA_INTSRC = 0x%08x\n", *intsrc);
printk("FPGA_INTREQ = 0x%08x\n", *intreq);
printk("FPGA_INTPRI[3..0] = %08x:%08x:%08x:%08x\n", *intprid, *intpric, *intprib, *intpria);
printk("-------------------------------------------------------------------------------\n");
}
Reference in New Issue View Git Blame Copy Permalink