path: root/drivers/mfd/ab8500-core.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
 * Author: Rabin Vincent <rabin.vincent@stericsson.com>
 * Author: Mattias Wallin <mattias.wallin@stericsson.com>
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/abx500/ab8500-bm.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/regulator/ab8500.h>
#include <linux/of.h>
#include <linux/of_device.h>

/*
 * Interrupt register offsets
 * Bank : 0x0E
 */
#define AB8500_IT_SOURCE1_REG		0x00
#define AB8500_IT_SOURCE2_REG		0x01
#define AB8500_IT_SOURCE3_REG		0x02
#define AB8500_IT_SOURCE4_REG		0x03
#define AB8500_IT_SOURCE5_REG		0x04
#define AB8500_IT_SOURCE6_REG		0x05
#define AB8500_IT_SOURCE7_REG		0x06
#define AB8500_IT_SOURCE8_REG		0x07
#define AB9540_IT_SOURCE13_REG		0x0C
#define AB8500_IT_SOURCE19_REG		0x12
#define AB8500_IT_SOURCE20_REG		0x13
#define AB8500_IT_SOURCE21_REG		0x14
#define AB8500_IT_SOURCE22_REG		0x15
#define AB8500_IT_SOURCE23_REG		0x16
#define AB8500_IT_SOURCE24_REG		0x17

/*
 * latch registers
 */
#define AB8500_IT_LATCH1_REG		0x20
#define AB8500_IT_LATCH2_REG		0x21
#define AB8500_IT_LATCH3_REG		0x22
#define AB8500_IT_LATCH4_REG		0x23
#define AB8500_IT_LATCH5_REG		0x24
#define AB8500_IT_LATCH6_REG		0x25
#define AB8500_IT_LATCH7_REG		0x26
#define AB8500_IT_LATCH8_REG		0x27
#define AB8500_IT_LATCH9_REG		0x28
#define AB8500_IT_LATCH10_REG		0x29
#define AB8500_IT_LATCH12_REG		0x2B
#define AB9540_IT_LATCH13_REG		0x2C
#define AB8500_IT_LATCH19_REG		0x32
#define AB8500_IT_LATCH20_REG		0x33
#define AB8500_IT_LATCH21_REG		0x34
#define AB8500_IT_LATCH22_REG		0x35
#define AB8500_IT_LATCH23_REG		0x36
#define AB8500_IT_LATCH24_REG		0x37

/*
 * mask registers
 */

#define AB8500_IT_MASK1_REG		0x40
#define AB8500_IT_MASK2_REG		0x41
#define AB8500_IT_MASK3_REG		0x42
#define AB8500_IT_MASK4_REG		0x43
#define AB8500_IT_MASK5_REG		0x44
#define AB8500_IT_MASK6_REG		0x45
#define AB8500_IT_MASK7_REG		0x46
#define AB8500_IT_MASK8_REG		0x47
#define AB8500_IT_MASK9_REG		0x48
#define AB8500_IT_MASK10_REG		0x49
#define AB8500_IT_MASK11_REG		0x4A
#define AB8500_IT_MASK12_REG		0x4B
#define AB8500_IT_MASK13_REG		0x4C
#define AB8500_IT_MASK14_REG		0x4D
#define AB8500_IT_MASK15_REG		0x4E
#define AB8500_IT_MASK16_REG		0x4F
#define AB8500_IT_MASK17_REG		0x50
#define AB8500_IT_MASK18_REG		0x51
#define AB8500_IT_MASK19_REG		0x52
#define AB8500_IT_MASK20_REG		0x53
#define AB8500_IT_MASK21_REG		0x54
#define AB8500_IT_MASK22_REG		0x55
#define AB8500_IT_MASK23_REG		0x56
#define AB8500_IT_MASK24_REG		0x57
#define AB8500_IT_MASK25_REG		0x58

/*
 * latch hierarchy registers
 */
#define AB8500_IT_LATCHHIER1_REG	0x60
#define AB8500_IT_LATCHHIER2_REG	0x61
#define AB8500_IT_LATCHHIER3_REG	0x62
#define AB8540_IT_LATCHHIER4_REG	0x63

#define AB8500_IT_LATCHHIER_NUM		3
#define AB8540_IT_LATCHHIER_NUM		4

#define AB8500_REV_REG			0x80
#define AB8500_IC_NAME_REG		0x82
#define AB8500_SWITCH_OFF_STATUS	0x00

#define AB8500_TURN_ON_STATUS		0x00
#define AB8505_TURN_ON_STATUS_2		0x04

#define AB8500_CH_USBCH_STAT1_REG	0x02
#define VBUS_DET_DBNC100		0x02
#define VBUS_DET_DBNC1			0x01

static DEFINE_SPINLOCK(on_stat_lock);
static u8 turn_on_stat_mask = 0xFF;
static u8 turn_on_stat_set;
static bool no_bm; /* No battery management */
/*
 * not really modular, but the easiest way to keep compat with existing
 * bootargs behaviour is to continue using module_param here.
 */
module_param(no_bm, bool, S_IRUGO);

#define AB9540_MODEM_CTRL2_REG			0x23
#define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT	BIT(2)

/*
 * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
 * numbers are indexed into this array with (num / 8). The interupts are
 * defined in linux/mfd/ab8500.h
 *
 * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
 * offset 0.
 */
/* AB8500 support */
static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
	0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
};

/* AB9540 / AB8505 support */
static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = {
	0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23
};

/* AB8540 support */
static