linux-imx

/*

 * Copyright (c) 2011, Code Aurora Forum. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

​

#define pr_fmt(fmt) "%s: " fmt, __func__

​

#include <linux/kernel.h>

#include <linux/interrupt.h>

#include <linux/irqchip/chained_irq.h>

#include <linux/irq.h>

#include <linux/irqdomain.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/err.h>

#include <linux/ssbi.h>

#include <linux/regmap.h>

#include <linux/of_platform.h>

#include <linux/mfd/core.h>

​

#define SSBI_REG_ADDR_IRQ_BASE      0x1BB

​

#define SSBI_REG_ADDR_IRQ_ROOT      (SSBI_REG_ADDR_IRQ_BASE + 0)

#define SSBI_REG_ADDR_IRQ_M_STATUS1 (SSBI_REG_ADDR_IRQ_BASE + 1)

#define SSBI_REG_ADDR_IRQ_M_STATUS2 (SSBI_REG_ADDR_IRQ_BASE + 2)

#define SSBI_REG_ADDR_IRQ_M_STATUS3 (SSBI_REG_ADDR_IRQ_BASE + 3)

#define SSBI_REG_ADDR_IRQ_M_STATUS4 (SSBI_REG_ADDR_IRQ_BASE + 4)

#define SSBI_REG_ADDR_IRQ_BLK_SEL   (SSBI_REG_ADDR_IRQ_BASE + 5)

#define SSBI_REG_ADDR_IRQ_IT_STATUS (SSBI_REG_ADDR_IRQ_BASE + 6)

#define SSBI_REG_ADDR_IRQ_CONFIG    (SSBI_REG_ADDR_IRQ_BASE + 7)

#define SSBI_REG_ADDR_IRQ_RT_STATUS (SSBI_REG_ADDR_IRQ_BASE + 8)

​

#define PM8821_SSBI_REG_ADDR_IRQ_BASE   0x100

#define PM8821_SSBI_REG_ADDR_IRQ_MASTER0 (PM8821_SSBI_REG_ADDR_IRQ_BASE + 0x30)

#define PM8821_SSBI_REG_ADDR_IRQ_MASTER1 (PM8821_SSBI_REG_ADDR_IRQ_BASE + 0xb0)

#define PM8821_SSBI_REG(m, b, offset) \

            ((m == 0) ? \

            (PM8821_SSBI_REG_ADDR_IRQ_MASTER0 + b + offset) : \

            (PM8821_SSBI_REG_ADDR_IRQ_MASTER1 + b + offset))

#define PM8821_SSBI_ADDR_IRQ_ROOT(m, b)     PM8821_SSBI_REG(m, b, 0x0)

#define PM8821_SSBI_ADDR_IRQ_CLEAR(m, b)    PM8821_SSBI_REG(m, b, 0x01)

#define PM8821_SSBI_ADDR_IRQ_MASK(m, b)     PM8821_SSBI_REG(m, b, 0x08)

#define PM8821_SSBI_ADDR_IRQ_RT_STATUS(m, b)    PM8821_SSBI_REG(m, b, 0x0f)

​

#define PM8821_BLOCKS_PER_MASTER    7

​

#define PM_IRQF_LVL_SEL         0x01    /* level select */

#define PM_IRQF_MASK_FE         0x02    /* mask falling edge */

#define PM_IRQF_MASK_RE         0x04    /* mask rising edge */

#define PM_IRQF_CLR         0x08    /* clear interrupt */

#define PM_IRQF_BITS_MASK       0x70

#define PM_IRQF_BITS_SHIFT      4

#define PM_IRQF_WRITE           0x80

​

#define PM_IRQF_MASK_ALL        (PM_IRQF_MASK_FE | \

                    PM_IRQF_MASK_RE)

​

#define REG_HWREV       0x002  /* PMIC4 revision */

#define REG_HWREV_2     0x0E8  /* PMIC4 revision 2 */

​

#define PM8XXX_NR_IRQS      256

#define PM8821_NR_IRQS      112

​

struct pm_irq_data {

    int num_irqs;

    struct irq_chip *irq_chip;

    void (*irq_handler)(struct irq_desc *desc);

};

​

struct pm_irq_chip {

    struct regmap       *regmap;

    spinlock_t      pm_irq_lock;

    struct irq_domain   *irqdomain;

    unsigned int        num_blocks;

    unsigned int        num_masters;

    const struct pm_irq_data *pm_irq_data;

    /* MUST BE AT THE END OF THIS STRUCT */

    u8          config[0];

};

​

static int pm8xxx_read_block_irq(struct pm_irq_chip *chip, unsigned int bp,

                 unsigned int *ip)

{