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Commit 0addd61b authored by Rajendra Nayak's avatar Rajendra Nayak Committed by Kevin Hilman
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OMAP3: PM: INTC context save/restore 



Add context save and restore for the INTC module to support off-mode.

Signed-off-by: default avatarRajendra Nayak <rnayak@ti.com>
Signed-off-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent 40c670f0

arch/arm/mach-omap2/irq.c

+66 −0
Original line number Diff line number Diff line
@@ -25,6 +25,10 @@ 
#define INTC_SYSSTATUS		0x0014

#define INTC_SIR		0x0040

#define INTC_CONTROL		0x0048

#define INTC_PROTECTION		0x004C

#define INTC_IDLE		0x0050

#define INTC_THRESHOLD		0x0068

#define INTC_MIR0		0x0084

#define INTC_MIR_CLEAR0		0x0088

#define INTC_MIR_SET0		0x008c

#define INTC_PENDING_IRQ0	0x0098
@@ -48,6 +52,18 @@ static struct omap_irq_bank { 
	},

};



/* Structure to save interrupt controller context */

struct omap3_intc_regs {

	u32 sysconfig;

	u32 protection;

	u32 idle;

	u32 threshold;

	u32 ilr[INTCPS_NR_IRQS];

	u32 mir[INTCPS_NR_MIR_REGS];

};



static struct omap3_intc_regs intc_context[ARRAY_SIZE(irq_banks)];



/* INTC bank register get/set */



static void intc_bank_write_reg(u32 val, struct omap_irq_bank *bank, u16 reg)
@@ -209,3 +225,53 @@ void __init omap_init_irq(void) 
	}

}



#ifdef CONFIG_ARCH_OMAP3

void omap_intc_save_context(void)

{

	int ind = 0, i = 0;

	for (ind = 0; ind < ARRAY_SIZE(irq_banks); ind++) {

		struct omap_irq_bank *bank = irq_banks + ind;

		intc_context[ind].sysconfig =

			intc_bank_read_reg(bank, INTC_SYSCONFIG);

		intc_context[ind].protection =

			intc_bank_read_reg(bank, INTC_PROTECTION);

		intc_context[ind].idle =

			intc_bank_read_reg(bank, INTC_IDLE);

		intc_context[ind].threshold =

			intc_bank_read_reg(bank, INTC_THRESHOLD);

		for (i = 0; i < INTCPS_NR_IRQS; i++)

			intc_context[ind].ilr[i] =

				intc_bank_read_reg(bank, (0x100 + 0x4*ind));

		for (i = 0; i < INTCPS_NR_MIR_REGS; i++)

			intc_context[ind].mir[i] =

				intc_bank_read_reg(&irq_banks[0], INTC_MIR0 +

				(0x20 * i));

	}

}



void omap_intc_restore_context(void)

{

	int ind = 0, i = 0;



	for (ind = 0; ind < ARRAY_SIZE(irq_banks); ind++) {

		struct omap_irq_bank *bank = irq_banks + ind;

		intc_bank_write_reg(intc_context[ind].sysconfig,

					bank, INTC_SYSCONFIG);

		intc_bank_write_reg(intc_context[ind].sysconfig,

					bank, INTC_SYSCONFIG);

		intc_bank_write_reg(intc_context[ind].protection,

					bank, INTC_PROTECTION);

		intc_bank_write_reg(intc_context[ind].idle,

					bank, INTC_IDLE);

		intc_bank_write_reg(intc_context[ind].threshold,

					bank, INTC_THRESHOLD);

		for (i = 0; i < INTCPS_NR_IRQS; i++)

			intc_bank_write_reg(intc_context[ind].ilr[i],

				bank, (0x100 + 0x4*ind));

		for (i = 0; i < INTCPS_NR_MIR_REGS; i++)

			intc_bank_write_reg(intc_context[ind].mir[i],

				 &irq_banks[0], INTC_MIR0 + (0x20 * i));

	}

	/* MIRs are saved and restore with other PRCM registers */

}

#endif /* CONFIG_ARCH_OMAP3 */

arch/arm/plat-omap/include/plat/irqs.h

+5 −0
Original line number Diff line number Diff line
@@ -477,9 +477,14 @@ 


#define OMAP_IRQ_BIT(irq)	(1 << ((irq) % 32))



#define INTCPS_NR_MIR_REGS	3

#define INTCPS_NR_IRQS		96



#ifndef __ASSEMBLY__

extern void omap_init_irq(void);

extern int omap_irq_pending(void);

void omap_intc_save_context(void);

void omap_intc_restore_context(void);

#endif



#include <mach/hardware.h>