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kernel/drivers/mfd/ab8500-debugfs.c

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init repo.
2024-07-22 17:22:30 +08:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) ST-Ericsson SA 2010
*
* Author: Mattias Wallin <mattias.wallin@stericsson.com> for ST-Ericsson.
*/
/*
* AB8500 register access
* ======================
*
* read:
* # echo BANK > <debugfs>/ab8500/register-bank
* # echo ADDR > <debugfs>/ab8500/register-address
* # cat <debugfs>/ab8500/register-value
*
* write:
* # echo BANK > <debugfs>/ab8500/register-bank
* # echo ADDR > <debugfs>/ab8500/register-address
* # echo VALUE > <debugfs>/ab8500/register-value
*
* read all registers from a bank:
* # echo BANK > <debugfs>/ab8500/register-bank
* # cat <debugfs>/ab8500/all-bank-register
*
* BANK target AB8500 register bank
* ADDR target AB8500 register address
* VALUE decimal or 0x-prefixed hexadecimal
*
*
* User Space notification on AB8500 IRQ
* =====================================
*
* Allows user space entity to be notified when target AB8500 IRQ occurs.
* When subscribed, a sysfs entry is created in ab8500.i2c platform device.
* One can pool this file to get target IRQ occurence information.
*
* subscribe to an AB8500 IRQ:
* # echo IRQ > <debugfs>/ab8500/irq-subscribe
*
* unsubscribe from an AB8500 IRQ:
* # echo IRQ > <debugfs>/ab8500/irq-unsubscribe
*
*
* AB8500 register formated read/write access
* ==========================================
*
* Read: read data, data>>SHIFT, data&=MASK, output data
* [0xABCDEF98] shift=12 mask=0xFFF => 0x00000CDE
* Write: read data, data &= ~(MASK<<SHIFT), data |= (VALUE<<SHIFT), write data
* [0xABCDEF98] shift=12 mask=0xFFF value=0x123 => [0xAB123F98]
*
* Usage:
* # echo "CMD [OPTIONS] BANK ADRESS [VALUE]" > $debugfs/ab8500/hwreg
*
* CMD read read access
* write write access
*
* BANK target reg bank
* ADDRESS target reg address
* VALUE (write) value to be updated
*
* OPTIONS
* -d|-dec (read) output in decimal
* -h|-hexa (read) output in 0x-hexa (default)
* -l|-w|-b 32bit (default), 16bit or 8bit reg access
* -m|-mask MASK 0x-hexa mask (default 0xFFFFFFFF)
* -s|-shift SHIFT bit shift value (read:left, write:right)
* -o|-offset OFFSET address offset to add to ADDRESS value
*
* Warning: bit shift operation is applied to bit-mask.
* Warning: bit shift direction depends on read or right command.
*/
#include <linux/seq_file.h>
#include <linux/uaccess.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/debugfs.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/kobject.h>
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#ifdef CONFIG_DEBUG_FS
#include <linux/string.h>
#include <linux/ctype.h>
#endif
static u32 debug_bank;
static u32 debug_address;
static int irq_ab8500;
static int irq_first;
static int irq_last;
static u32 *irq_count;
static int num_irqs;
static struct device_attribute **dev_attr;
static char **event_name;
/**
* struct ab8500_reg_range
* @first: the first address of the range
* @last: the last address of the range
* @perm: access permissions for the range
*/
struct ab8500_reg_range {
u8 first;
u8 last;
u8 perm;
};
/**
* struct ab8500_prcmu_ranges
* @num_ranges: the number of ranges in the list
* @bankid: bank identifier
* @range: the list of register ranges
*/
struct ab8500_prcmu_ranges {
u8 num_ranges;
u8 bankid;
const struct ab8500_reg_range *range;
};
/* hwreg- "mask" and "shift" entries ressources */
struct hwreg_cfg {
u32 bank; /* target bank */
unsigned long addr; /* target address */
uint fmt; /* format */
unsigned long mask; /* read/write mask, applied before any bit shift */
long shift; /* bit shift (read:right shift, write:left shift */
};
/* fmt bit #0: 0=hexa, 1=dec */
#define REG_FMT_DEC(c) ((c)->fmt & 0x1)
#define REG_FMT_HEX(c) (!REG_FMT_DEC(c))
static struct hwreg_cfg hwreg_cfg = {
.addr = 0, /* default: invalid phys addr */
.fmt = 0, /* default: 32bit access, hex output */
.mask = 0xFFFFFFFF, /* default: no mask */
.shift = 0, /* default: no bit shift */
};
#define AB8500_NAME_STRING "ab8500"
#define AB8500_NUM_BANKS AB8500_DEBUG_FIELD_LAST
#define AB8500_REV_REG 0x80
static struct ab8500_prcmu_ranges *debug_ranges;
static struct ab8500_prcmu_ranges ab8500_debug_ranges[AB8500_NUM_BANKS] = {
[AB8500_M_FSM_RANK] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_SYS_CTRL1_BLOCK] = {
.num_ranges = 3,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x02,
},
{
.first = 0x42,
.last = 0x42,
},
{
.first = 0x80,
.last = 0x81,
},
},
},
[AB8500_SYS_CTRL2_BLOCK] = {
.num_ranges = 4,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x0D,
},
{
.first = 0x0F,
.last = 0x17,
},
{
.first = 0x30,
.last = 0x30,
},
{
.first = 0x32,
.last = 0x33,
},
},
},
[AB8500_REGU_CTRL1] = {
.num_ranges = 3,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x00,
},
{
.first = 0x03,
.last = 0x10,
},
{
.first = 0x80,
.last = 0x84,
},
},
},
[AB8500_REGU_CTRL2] = {
.num_ranges = 5,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x15,
},
{
.first = 0x17,
.last = 0x19,
},
{
.first = 0x1B,
.last = 0x1D,
},
{
.first = 0x1F,
.last = 0x22,
},
{
.first = 0x40,
.last = 0x44,
},
/*
* 0x80-0x8B are SIM registers and should
* not be accessed from here
*/
},
},
[AB8500_USB] = {
.num_ranges = 2,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x80,
.last = 0x83,
},
{
.first = 0x87,
.last = 0x8A,
},
},
},
[AB8500_TVOUT] = {
.num_ranges = 9,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x12,
},
{
.first = 0x15,
.last = 0x17,
},
{
.first = 0x19,
.last = 0x21,
},
{
.first = 0x27,
.last = 0x2C,
},
{
.first = 0x41,
.last = 0x41,
},
{
.first = 0x45,
.last = 0x5B,
},
{
.first = 0x5D,
.last = 0x5D,
},
{
.first = 0x69,
.last = 0x69,
},
{
.first = 0x80,
.last = 0x81,
},
},
},
[AB8500_DBI] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_ECI_AV_ACC] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x80,
.last = 0x82,
},
},
},
[AB8500_RESERVED] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_GPADC] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x08,
},
},
},
[AB8500_CHARGER] = {
.num_ranges = 9,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x03,
},
{
.first = 0x05,
.last = 0x05,
},
{
.first = 0x40,
.last = 0x40,
},
{
.first = 0x42,
.last = 0x42,
},
{
.first = 0x44,
.last = 0x44,
},
{
.first = 0x50,
.last = 0x55,
},
{
.first = 0x80,
.last = 0x82,
},
{
.first = 0xC0,
.last = 0xC2,
},
{
.first = 0xf5,
.last = 0xf6,
},
},
},
[AB8500_GAS_GAUGE] = {
.num_ranges = 3,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x00,
},
{
.first = 0x07,
.last = 0x0A,
},
{
.first = 0x10,
.last = 0x14,
},
},
},
[AB8500_AUDIO] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x6F,
},
},
},
[AB8500_INTERRUPT] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_RTC] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x0F,
},
},
},
[AB8500_MISC] = {
.num_ranges = 8,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x05,
},
{
.first = 0x10,
.last = 0x15,
},
{
.first = 0x20,
.last = 0x25,
},
{
.first = 0x30,
.last = 0x35,
},
{
.first = 0x40,
.last = 0x45,
},
{
.first = 0x50,
.last = 0x50,
},
{
.first = 0x60,
.last = 0x67,
},
{
.first = 0x80,
.last = 0x80,
},
},
},
[AB8500_DEVELOPMENT] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x00,
},
},
},
[AB8500_DEBUG] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x05,
.last = 0x07,
},
},
},
[AB8500_PROD_TEST] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_STE_TEST] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_OTP_EMUL] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x01,
.last = 0x0F,
},
},
},
};
static struct ab8500_prcmu_ranges ab8505_debug_ranges[AB8500_NUM_BANKS] = {
[0x0] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_SYS_CTRL1_BLOCK] = {
.num_ranges = 5,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x04,
},
{
.first = 0x42,
.last = 0x42,
},
{
.first = 0x52,
.last = 0x52,
},
{
.first = 0x54,
.last = 0x57,
},
{
.first = 0x80,
.last = 0x83,
},
},
},
[AB8500_SYS_CTRL2_BLOCK] = {
.num_ranges = 5,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x0D,
},
{
.first = 0x0F,
.last = 0x17,
},
{
.first = 0x20,
.last = 0x20,
},
{
.first = 0x30,
.last = 0x30,
},
{
.first = 0x32,
.last = 0x3A,
},
},
},
[AB8500_REGU_CTRL1] = {
.num_ranges = 3,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x00,
},
{
.first = 0x03,
.last = 0x11,
},
{
.first = 0x80,
.last = 0x86,
},
},
},
[AB8500_REGU_CTRL2] = {
.num_ranges = 6,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x06,
},
{
.first = 0x08,
.last = 0x15,
},
{
.first = 0x17,
.last = 0x19,
},
{
.first = 0x1B,
.last = 0x1D,
},
{
.first = 0x1F,
.last = 0x30,
},
{
.first = 0x40,
.last = 0x48,
},
/*
* 0x80-0x8B are SIM registers and should
* not be accessed from here
*/
},
},
[AB8500_USB] = {
.num_ranges = 3,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x80,
.last = 0x83,
},
{
.first = 0x87,
.last = 0x8A,
},
{
.first = 0x91,
.last = 0x94,
},
},
},
[AB8500_TVOUT] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_DBI] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_ECI_AV_ACC] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x80,
.last = 0x82,
},
},
},
[AB8500_RESERVED] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_GPADC] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x08,
},
},
},
[AB8500_CHARGER] = {
.num_ranges = 9,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x02,
.last = 0x03,
},
{
.first = 0x05,
.last = 0x05,
},
{
.first = 0x40,
.last = 0x44,
},
{
.first = 0x50,
.last = 0x57,
},
{
.first = 0x60,
.last = 0x60,
},
{
.first = 0xA0,
.last = 0xA7,
},
{
.first = 0xAF,
.last = 0xB2,
},
{
.first = 0xC0,
.last = 0xC2,
},
{
.first = 0xF5,
.last = 0xF5,
},
},
},
[AB8500_GAS_GAUGE] = {
.num_ranges = 3,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x00,
},
{
.first = 0x07,
.last = 0x0A,
},
{
.first = 0x10,
.last = 0x14,
},
},
},
[AB8500_AUDIO] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x83,
},
},
},
[AB8500_INTERRUPT] = {
.num_ranges = 11,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x04,
},
{
.first = 0x06,
.last = 0x07,
},
{
.first = 0x09,
.last = 0x09,
},
{
.first = 0x0B,
.last = 0x0C,
},
{
.first = 0x12,
.last = 0x15,
},
{
.first = 0x18,
.last = 0x18,
},
/* Latch registers should not be read here */
{
.first = 0x40,
.last = 0x44,
},
{
.first = 0x46,
.last = 0x49,
},
{
.first = 0x4B,
.last = 0x4D,
},
{
.first = 0x52,
.last = 0x55,
},
{
.first = 0x58,
.last = 0x58,
},
/* LatchHier registers should not be read here */
},
},
[AB8500_RTC] = {
.num_ranges = 2,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x14,
},
{
.first = 0x16,
.last = 0x17,
},
},
},
[AB8500_MISC] = {
.num_ranges = 8,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x06,
},
{
.first = 0x10,
.last = 0x16,
},
{
.first = 0x20,
.last = 0x26,
},
{
.first = 0x30,
.last = 0x36,
},
{
.first = 0x40,
.last = 0x46,
},
{
.first = 0x50,
.last = 0x50,
},
{
.first = 0x60,
.last = 0x6B,
},
{
.first = 0x80,
.last = 0x82,
},
},
},
[AB8500_DEVELOPMENT] = {
.num_ranges = 2,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x00,
},
{
.first = 0x05,
.last = 0x05,
},
},
},
[AB8500_DEBUG] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x05,
.last = 0x07,
},
},
},
[AB8500_PROD_TEST] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_STE_TEST] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_OTP_EMUL] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x01,
.last = 0x15,
},
},
},
};
static struct ab8500_prcmu_ranges ab8540_debug_ranges[AB8500_NUM_BANKS] = {
[AB8500_M_FSM_RANK] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x0B,
},
},
},
[AB8500_SYS_CTRL1_BLOCK] = {
.num_ranges = 6,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x04,
},
{
.first = 0x42,
.last = 0x42,
},
{
.first = 0x50,
.last = 0x54,
},
{
.first = 0x57,
.last = 0x57,
},
{
.first = 0x80,
.last = 0x83,
},
{
.first = 0x90,
.last = 0x90,
},
},
},
[AB8500_SYS_CTRL2_BLOCK] = {
.num_ranges = 5,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x0D,
},
{
.first = 0x0F,
.last = 0x10,
},
{
.first = 0x20,
.last = 0x21,
},
{
.first = 0x32,
.last = 0x3C,
},
{
.first = 0x40,
.last = 0x42,
},
},
},
[AB8500_REGU_CTRL1] = {
.num_ranges = 4,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x03,
.last = 0x15,
},
{
.first = 0x20,
.last = 0x20,
},
{
.first = 0x80,
.last = 0x85,
},
{
.first = 0x87,
.last = 0x88,
},
},
},
[AB8500_REGU_CTRL2] = {
.num_ranges = 8,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x06,
},
{
.first = 0x08,
.last = 0x15,
},
{
.first = 0x17,
.last = 0x19,
},
{
.first = 0x1B,
.last = 0x1D,
},
{
.first = 0x1F,
.last = 0x2F,
},
{
.first = 0x31,
.last = 0x3A,
},
{
.first = 0x43,
.last = 0x44,
},
{
.first = 0x48,
.last = 0x49,
},
},
},
[AB8500_USB] = {
.num_ranges = 3,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x80,
.last = 0x83,
},
{
.first = 0x87,
.last = 0x8A,
},
{
.first = 0x91,
.last = 0x94,
},
},
},
[AB8500_TVOUT] = {
.num_ranges = 0,
.range = NULL
},
[AB8500_DBI] = {
.num_ranges = 4,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x07,
},
{
.first = 0x10,
.last = 0x11,
},
{
.first = 0x20,
.last = 0x21,
},
{
.first = 0x30,
.last = 0x43,
},
},
},
[AB8500_ECI_AV_ACC] = {
.num_ranges = 2,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x03,
},
{
.first = 0x80,
.last = 0x82,
},
},
},
[AB8500_RESERVED] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_GPADC] = {
.num_ranges = 4,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x01,
},
{
.first = 0x04,
.last = 0x06,
},
{
.first = 0x09,
.last = 0x0A,
},
{
.first = 0x10,
.last = 0x14,
},
},
},
[AB8500_CHARGER] = {
.num_ranges = 10,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x00,
},
{
.first = 0x02,
.last = 0x05,
},
{
.first = 0x40,
.last = 0x44,
},
{
.first = 0x50,
.last = 0x57,
},
{
.first = 0x60,
.last = 0x60,
},
{
.first = 0x70,
.last = 0x70,
},
{
.first = 0xA0,
.last = 0xA9,
},
{
.first = 0xAF,
.last = 0xB2,
},
{
.first = 0xC0,
.last = 0xC6,
},
{
.first = 0xF5,
.last = 0xF5,
},
},
},
[AB8500_GAS_GAUGE] = {
.num_ranges = 3,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x00,
},
{
.first = 0x07,
.last = 0x0A,
},
{
.first = 0x10,
.last = 0x14,
},
},
},
[AB8500_AUDIO] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x9f,
},
},
},
[AB8500_INTERRUPT] = {
.num_ranges = 6,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x05,
},
{
.first = 0x0B,
.last = 0x0D,
},
{
.first = 0x12,
.last = 0x20,
},
/* Latch registers should not be read here */
{
.first = 0x40,
.last = 0x45,
},
{
.first = 0x4B,
.last = 0x4D,
},
{
.first = 0x52,
.last = 0x60,
},
/* LatchHier registers should not be read here */
},
},
[AB8500_RTC] = {
.num_ranges = 3,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x07,
},
{
.first = 0x0B,
.last = 0x18,
},
{
.first = 0x20,
.last = 0x25,
},
},
},
[AB8500_MISC] = {
.num_ranges = 9,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x06,
},
{
.first = 0x10,
.last = 0x16,
},
{
.first = 0x20,
.last = 0x26,
},
{
.first = 0x30,
.last = 0x36,
},
{
.first = 0x40,
.last = 0x49,
},
{
.first = 0x50,
.last = 0x50,
},
{
.first = 0x60,
.last = 0x6B,
},
{
.first = 0x70,
.last = 0x74,
},
{
.first = 0x80,
.last = 0x82,
},
},
},
[AB8500_DEVELOPMENT] = {
.num_ranges = 3,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x01,
},
{
.first = 0x06,
.last = 0x06,
},
{
.first = 0x10,
.last = 0x21,
},
},
},
[AB8500_DEBUG] = {
.num_ranges = 3,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x01,
.last = 0x0C,
},
{
.first = 0x0E,
.last = 0x11,
},
{
.first = 0x80,
.last = 0x81,
},
},
},
[AB8500_PROD_TEST] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_STE_TEST] = {
.num_ranges = 0,
.range = NULL,
},
[AB8500_OTP_EMUL] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x3F,
},
},
},
};
static irqreturn_t ab8500_debug_handler(int irq, void *data)
{
char buf[16];
struct kobject *kobj = (struct kobject *)data;
unsigned int irq_abb = irq - irq_first;
if (irq_abb < num_irqs)
irq_count[irq_abb]++;
/*
* This makes it possible to use poll for events (EPOLLPRI | EPOLLERR)
* from userspace on sysfs file named <irq-nr>
*/
sprintf(buf, "%d", irq);
sysfs_notify(kobj, NULL, buf);
return IRQ_HANDLED;
}
/* Prints to seq_file or log_buf */
static int ab8500_registers_print(struct device *dev, u32 bank,
struct seq_file *s)
{
unsigned int i;
for (i = 0; i < debug_ranges[bank].num_ranges; i++) {
u32 reg;
for (reg = debug_ranges[bank].range[i].first;
reg <= debug_ranges[bank].range[i].last;
reg++) {
u8 value;
int err;
err = abx500_get_register_interruptible(dev,
(u8)bank, (u8)reg, &value);
if (err < 0) {
dev_err(dev, "ab->read fail %d\n", err);
return err;
}
if (s) {
seq_printf(s, " [0x%02X/0x%02X]: 0x%02X\n",
bank, reg, value);
/*
* Error is not returned here since
* the output is wanted in any case
*/
if (seq_has_overflowed(s))
return 0;
} else {
dev_info(dev, " [0x%02X/0x%02X]: 0x%02X\n",
bank, reg, value);
}
}
}
return 0;
}
static int ab8500_bank_registers_show(struct seq_file *s, void *p)
{
struct device *dev = s->private;
u32 bank = debug_bank;
seq_puts(s, AB8500_NAME_STRING " register values:\n");
seq_printf(s, " bank 0x%02X:\n", bank);
return ab8500_registers_print(dev, bank, s);
}
DEFINE_SHOW_ATTRIBUTE(ab8500_bank_registers);
static int ab8500_print_all_banks(struct seq_file *s, void *p)
{
struct device *dev = s->private;
unsigned int i;
seq_puts(s, AB8500_NAME_STRING " register values:\n");
for (i = 0; i < AB8500_NUM_BANKS; i++) {
int err;
seq_printf(s, " bank 0x%02X:\n", i);
err = ab8500_registers_print(dev, i, s);
if (err)
return err;
}
return 0;
}
/* Dump registers to kernel log */
void ab8500_dump_all_banks(struct device *dev)
{
unsigned int i;
dev_info(dev, "ab8500 register values:\n");
for (i = 1; i < AB8500_NUM_BANKS; i++) {
dev_info(dev, " bank 0x%02X:\n", i);
ab8500_registers_print(dev, i, NULL);
}
}
static int ab8500_all_banks_open(struct inode *inode, struct file *file)
{
struct seq_file *s;
int err;
err = single_open(file, ab8500_print_all_banks, inode->i_private);
if (!err) {
/* Default buf size in seq_read is not enough */
s = (struct seq_file *)file->private_data;
s->size = (PAGE_SIZE * 2);
s->buf = kmalloc(s->size, GFP_KERNEL);
if (!s->buf) {
single_release(inode, file);
err = -ENOMEM;
}
}
return err;
}
static const struct file_operations ab8500_all_banks_fops = {
.open = ab8500_all_banks_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static int ab8500_bank_print(struct seq_file *s, void *p)
{
seq_printf(s, "0x%02X\n", debug_bank);
return 0;
}
static int ab8500_bank_open(struct inode *inode, struct file *file)
{
return single_open(file, ab8500_bank_print, inode->i_private);
}
static ssize_t ab8500_bank_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct device *dev = ((struct seq_file *)(file->private_data))->private;
unsigned long user_bank;
int err;
err = kstrtoul_from_user(user_buf, count, 0, &user_bank);
if (err)
return err;
if (user_bank >= AB8500_NUM_BANKS) {
dev_err(dev, "debugfs error input > number of banks\n");
return -EINVAL;
}
debug_bank = user_bank;
return count;
}
static int ab8500_address_print(struct seq_file *s, void *p)
{
seq_printf(s, "0x%02X\n", debug_address);
return 0;
}
static int ab8500_address_open(struct inode *inode, struct file *file)
{
return single_open(file, ab8500_address_print, inode->i_private);
}
static ssize_t ab8500_address_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct device *dev = ((struct seq_file *)(file->private_data))->private;
unsigned long user_address;
int err;
err = kstrtoul_from_user(user_buf, count, 0, &user_address);
if (err)
return err;
if (user_address > 0xff) {
dev_err(dev, "debugfs error input > 0xff\n");
return -EINVAL;
}
debug_address = user_address;
return count;
}
static int ab8500_val_print(struct seq_file *s, void *p)
{
struct device *dev = s->private;
int ret;
u8 regvalue;
ret = abx500_get_register_interruptible(dev,
(u8)debug_bank, (u8)debug_address, &regvalue);
if (ret < 0) {
dev_err(dev, "abx500_get_reg fail %d, %d\n",
ret, __LINE__);
return -EINVAL;
}
seq_printf(s, "0x%02X\n", regvalue);
return 0;
}
static int ab8500_val_open(struct inode *inode, struct file *file)
{
return single_open(file, ab8500_val_print, inode->i_private);
}
static ssize_t ab8500_val_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct device *dev = ((struct seq_file *)(file->private_data))->private;
unsigned long user_val;
int err;
err = kstrtoul_from_user(user_buf, count, 0, &user_val);
if (err)
return err;
if (user_val > 0xff) {
dev_err(dev, "debugfs error input > 0xff\n");
return -EINVAL;
}
err = abx500_set_register_interruptible(dev,
(u8)debug_bank, debug_address, (u8)user_val);
if (err < 0) {
pr_err("abx500_set_reg failed %d, %d", err, __LINE__);
return -EINVAL;
}
return count;
}
/*
* Interrupt status
*/
static u32 num_interrupts[AB8500_MAX_NR_IRQS];
static u32 num_wake_interrupts[AB8500_MAX_NR_IRQS];
static int num_interrupt_lines;
void ab8500_debug_register_interrupt(int line)
{
if (line < num_interrupt_lines)
num_interrupts[line]++;
}
static int ab8500_interrupts_show(struct seq_file *s, void *p)
{
int line;
seq_puts(s, "name: number: irq: number of: wake:\n");
for (line = 0; line < num_interrupt_lines; line++) {
seq_printf(s, "%3i: %4i %6i %4i\n",
line,
line + irq_first,
num_interrupts[line],
num_wake_interrupts[line]);
}
return 0;
}
DEFINE_SHOW_ATTRIBUTE(ab8500_interrupts);
/*
* - HWREG DB8500 formated routines
*/
static int ab8500_hwreg_print(struct seq_file *s, void *d)
{
struct device *dev = s->private;
int ret;
u8 regvalue;
ret = abx500_get_register_interruptible(dev,
(u8)hwreg_cfg.bank, (u8)hwreg_cfg.addr, &regvalue);
if (ret < 0) {
dev_err(dev, "abx500_get_reg fail %d, %d\n",
ret, __LINE__);
return -EINVAL;
}
if (hwreg_cfg.shift >= 0)
regvalue >>= hwreg_cfg.shift;
else
regvalue <<= -hwreg_cfg.shift;
regvalue &= hwreg_cfg.mask;
if (REG_FMT_DEC(&hwreg_cfg))
seq_printf(s, "%d\n", regvalue);
else
seq_printf(s, "0x%02X\n", regvalue);
return 0;
}
static int ab8500_hwreg_open(struct inode *inode, struct file *file)
{
return single_open(file, ab8500_hwreg_print, inode->i_private);
}
#define AB8500_SUPPLY_CONTROL_CONFIG_1 0x01
#define AB8500_SUPPLY_CONTROL_REG 0x00
#define AB8500_FIRST_SIM_REG 0x80
#define AB8500_LAST_SIM_REG 0x8B
#define AB8505_LAST_SIM_REG 0x8C
static int ab8500_modem_show(struct seq_file *s, void *p)
{
struct device *dev = s->private;
struct ab8500 *ab8500;
int err;
u8 value;
u8 orig_value;
u32 bank = AB8500_REGU_CTRL2;
u32 last_sim_reg = AB8500_LAST_SIM_REG;
u32 reg;
ab8500 = dev_get_drvdata(dev->parent);
dev_warn(dev, "WARNING! This operation can interfer with modem side\n"
"and should only be done with care\n");
err = abx500_get_register_interruptible(dev,
AB8500_REGU_CTRL1, AB8500_SUPPLY_CONTROL_REG, &orig_value);
if (err < 0)
goto report_read_failure;
/* Config 1 will allow APE side to read SIM registers */
err = abx500_set_register_interruptible(dev,
AB8500_REGU_CTRL1, AB8500_SUPPLY_CONTROL_REG,
AB8500_SUPPLY_CONTROL_CONFIG_1);
if (err < 0)
goto report_write_failure;
seq_printf(s, " bank 0x%02X:\n", bank);
if (is_ab9540(ab8500) || is_ab8505(ab8500))
last_sim_reg = AB8505_LAST_SIM_REG;
for (reg = AB8500_FIRST_SIM_REG; reg <= last_sim_reg; reg++) {
err = abx500_get_register_interruptible(dev,
bank, reg, &value);
if (err < 0)
goto report_read_failure;
seq_printf(s, " [0x%02X/0x%02X]: 0x%02X\n", bank, reg, value);
}
err = abx500_set_register_interruptible(dev,
AB8500_REGU_CTRL1, AB8500_SUPPLY_CONTROL_REG, orig_value);
if (err < 0)
goto report_write_failure;
return 0;
report_read_failure:
dev_err(dev, "ab->read fail %d\n", err);
return err;
report_write_failure:
dev_err(dev, "ab->write fail %d\n", err);
return err;
}
DEFINE_SHOW_ATTRIBUTE(ab8500_modem);
/*
* return length of an ASCII numerical value, 0 is string is not a
* numerical value.
* string shall start at value 1st char.
* string can be tailed with \0 or space or newline chars only.
* value can be decimal or hexadecimal (prefixed 0x or 0X).
*/
static int strval_len(char *b)
{
char *s = b;
if ((*s == '0') && ((*(s+1) == 'x') || (*(s+1) == 'X'))) {
s += 2;
for (; *s && (*s != ' ') && (*s != '\n'); s++) {
if (!isxdigit(*s))
return 0;
}
} else {
if (*s == '-')
s++;
for (; *s && (*s != ' ') && (*s != '\n'); s++) {
if (!isdigit(*s))
return 0;
}
}
return (int) (s-b);
}
/*
* parse hwreg input data.
* update global hwreg_cfg only if input data syntax is ok.
*/
static ssize_t hwreg_common_write(char *b, struct hwreg_cfg *cfg,
struct device *dev)
{
uint write, val = 0;
u8 regvalue;
int ret;
struct hwreg_cfg loc = {
.bank = 0, /* default: invalid phys addr */
.addr = 0, /* default: invalid phys addr */
.fmt = 0, /* default: 32bit access, hex output */
.mask = 0xFFFFFFFF, /* default: no mask */
.shift = 0, /* default: no bit shift */
};
/* read or write ? */
if (!strncmp(b, "read ", 5)) {
write = 0;
b += 5;
} else if (!strncmp(b, "write ", 6)) {
write = 1;
b += 6;
} else
return -EINVAL;
/* OPTIONS -l|-w|-b -s -m -o */
while ((*b == ' ') || (*b == '-')) {
if (*(b-1) != ' ') {
b++;
continue;
}
if ((!strncmp(b, "-d ", 3)) ||
(!strncmp(b, "-dec ", 5))) {
b += (*(b+2) == ' ') ? 3 : 5;
loc.fmt |= (1<<0);
} else if ((!strncmp(b, "-h ", 3)) ||
(!strncmp(b, "-hex ", 5))) {
b += (*(b+2) == ' ') ? 3 : 5;
loc.fmt &= ~(1<<0);
} else if ((!strncmp(b, "-m ", 3)) ||
(!strncmp(b, "-mask ", 6))) {
b += (*(b+2) == ' ') ? 3 : 6;
if (strval_len(b) == 0)
return -EINVAL;
ret = kstrtoul(b, 0, &loc.mask);
if (ret)
return ret;
} else if ((!strncmp(b, "-s ", 3)) ||
(!strncmp(b, "-shift ", 7))) {
b += (*(b+2) == ' ') ? 3 : 7;
if (strval_len(b) == 0)
return -EINVAL;
ret = kstrtol(b, 0, &loc.shift);
if (ret)
return ret;
} else {
return -EINVAL;
}
}
/* get arg BANK and ADDRESS */
if (strval_len(b) == 0)
return -EINVAL;
ret = kstrtouint(b, 0, &loc.bank);
if (ret)
return ret;
while (*b == ' ')
b++;
if (strval_len(b) == 0)
return -EINVAL;
ret = kstrtoul(b, 0, &loc.addr);
if (ret)
return ret;
if (write) {
while (*b == ' ')
b++;
if (strval_len(b) == 0)
return -EINVAL;
ret = kstrtouint(b, 0, &val);
if (ret)
return ret;
}
/* args are ok, update target cfg (mainly for read) */
*cfg = loc;
#ifdef ABB_HWREG_DEBUG
pr_warn("HWREG request: %s, %s,\n", (write) ? "write" : "read",
REG_FMT_DEC(cfg) ? "decimal" : "hexa");
pr_warn(" addr=0x%08X, mask=0x%X, shift=%d" "value=0x%X\n",
cfg->addr, cfg->mask, cfg->shift, val);
#endif
if (!write)
return 0;
ret = abx500_get_register_interruptible(dev,
(u8)cfg->bank, (u8)cfg->addr, &regvalue);
if (ret < 0) {
dev_err(dev, "abx500_get_reg fail %d, %d\n",
ret, __LINE__);
return -EINVAL;
}
if (cfg->shift >= 0) {
regvalue &= ~(cfg->mask << (cfg->shift));
val = (val & cfg->mask) << (cfg->shift);
} else {
regvalue &= ~(cfg->mask >> (-cfg->shift));
val = (val & cfg->mask) >> (-cfg->shift);
}
val = val | regvalue;
ret = abx500_set_register_interruptible(dev,
(u8)cfg->bank, (u8)cfg->addr, (u8)val);
if (ret < 0) {
pr_err("abx500_set_reg failed %d, %d", ret, __LINE__);
return -EINVAL;
}
return 0;
}
static ssize_t ab8500_hwreg_write(struct file *file,
const char __user *user_buf, size_t count, loff_t *ppos)
{
struct device *dev = ((struct seq_file *)(file->private_data))->private;
char buf[128];
int buf_size, ret;
/* Get userspace string and assure termination */
buf_size = min((int)count, (int)(sizeof(buf)-1));
if (copy_from_user(buf, user_buf, buf_size))
return -EFAULT;
buf[buf_size] = 0;
/* get args and process */
ret = hwreg_common_write(buf, &hwreg_cfg, dev);
return (ret) ? ret : buf_size;
}
/*
* - irq subscribe/unsubscribe stuff
*/
static int ab8500_subscribe_unsubscribe_print(struct seq_file *s, void *p)
{
seq_printf(s, "%d\n", irq_first);
return 0;
}
static int ab8500_subscribe_unsubscribe_open(struct inode *inode,
struct file *file)
{
return single_open(file, ab8500_subscribe_unsubscribe_print,
inode->i_private);
}
/*
* Userspace should use poll() on this file. When an event occur
* the blocking poll will be released.
*/
static ssize_t show_irq(struct device *dev,
struct device_attribute *attr, char *buf)
{
unsigned long name;
unsigned int irq_index;
int err;
err = kstrtoul(attr->attr.name, 0, &name);
if (err)
return err;
irq_index = name - irq_first;
if (irq_index >= num_irqs)
return -EINVAL;
return sprintf(buf, "%u\n", irq_count[irq_index]);
}
static ssize_t ab8500_subscribe_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct device *dev = ((struct seq_file *)(file->private_data))->private;
unsigned long user_val;
int err;
unsigned int irq_index;
err = kstrtoul_from_user(user_buf, count, 0, &user_val);
if (err)
return err;
if (user_val < irq_first) {
dev_err(dev, "debugfs error input < %d\n", irq_first);
return -EINVAL;
}
if (user_val > irq_last) {
dev_err(dev, "debugfs error input > %d\n", irq_last);
return -EINVAL;
}
irq_index = user_val - irq_first;
if (irq_index >= num_irqs)
return -EINVAL;
/*
* This will create a sysfs file named <irq-nr> which userspace can
* use to select or poll and get the AB8500 events
*/
dev_attr[irq_index] = kmalloc(sizeof(struct device_attribute),
GFP_KERNEL);
if (!dev_attr[irq_index])
return -ENOMEM;
event_name[irq_index] = kasprintf(GFP_KERNEL, "%lu", user_val);
if (!event_name[irq_index])
return -ENOMEM;
dev_attr[irq_index]->show = show_irq;
dev_attr[irq_index]->store = NULL;
dev_attr[irq_index]->attr.name = event_name[irq_index];
dev_attr[irq_index]->attr.mode = S_IRUGO;
err = sysfs_create_file(&dev->kobj, &dev_attr[irq_index]->attr);
if (err < 0) {
pr_info("sysfs_create_file failed %d\n", err);
return err;
}
err = request_threaded_irq(user_val, NULL, ab8500_debug_handler,
IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT,
"ab8500-debug", &dev->kobj);
if (err < 0) {
pr_info("request_threaded_irq failed %d, %lu\n",
err, user_val);
sysfs_remove_file(&dev->kobj, &dev_attr[irq_index]->attr);
return err;
}
return count;
}
static ssize_t ab8500_unsubscribe_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct device *dev = ((struct seq_file *)(file->private_data))->private;
unsigned long user_val;
int err;
unsigned int irq_index;
err = kstrtoul_from_user(user_buf, count, 0, &user_val);
if (err)
return err;
if (user_val < irq_first) {
dev_err(dev, "debugfs error input < %d\n", irq_first);
return -EINVAL;
}
if (user_val > irq_last) {
dev_err(dev, "debugfs error input > %d\n", irq_last);
return -EINVAL;
}
irq_index = user_val - irq_first;
if (irq_index >= num_irqs)
return -EINVAL;
/* Set irq count to 0 when unsubscribe */
irq_count[irq_index] = 0;
if (dev_attr[irq_index])
sysfs_remove_file(&dev->kobj, &dev_attr[irq_index]->attr);
free_irq(user_val, &dev->kobj);
kfree(event_name[irq_index]);
kfree(dev_attr[irq_index]);
return count;
}
/*
* - several debugfs nodes fops
*/
static const struct file_operations ab8500_bank_fops = {
.open = ab8500_bank_open,
.write = ab8500_bank_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static const struct file_operations ab8500_address_fops = {
.open = ab8500_address_open,
.write = ab8500_address_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static const struct file_operations ab8500_val_fops = {
.open = ab8500_val_open,
.write = ab8500_val_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static const struct file_operations ab8500_subscribe_fops = {
.open = ab8500_subscribe_unsubscribe_open,
.write = ab8500_subscribe_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static const struct file_operations ab8500_unsubscribe_fops = {
.open = ab8500_subscribe_unsubscribe_open,
.write = ab8500_unsubscribe_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static const struct file_operations ab8500_hwreg_fops = {
.open = ab8500_hwreg_open,
.write = ab8500_hwreg_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static int ab8500_debug_probe(struct platform_device *plf)
{
struct dentry *ab8500_dir;
struct ab8500 *ab8500;
struct resource *res;
debug_bank = AB8500_MISC;
debug_address = AB8500_REV_REG & 0x00FF;
ab8500 = dev_get_drvdata(plf->dev.parent);
num_irqs = ab8500->mask_size;
irq_count = devm_kcalloc(&plf->dev,
num_irqs, sizeof(*irq_count), GFP_KERNEL);
if (!irq_count)
return -ENOMEM;
dev_attr = devm_kcalloc(&plf->dev,
num_irqs, sizeof(*dev_attr), GFP_KERNEL);
if (!dev_attr)
return -ENOMEM;
event_name = devm_kcalloc(&plf->dev,
num_irqs, sizeof(*event_name), GFP_KERNEL);
if (!event_name)
return -ENOMEM;
res = platform_get_resource_byname(plf, 0, "IRQ_AB8500");
if (!res) {
dev_err(&plf->dev, "AB8500 irq not found, err %d\n", irq_first);
return -ENXIO;
}
irq_ab8500 = res->start;
irq_first = platform_get_irq_byname(plf, "IRQ_FIRST");
if (irq_first < 0)
return irq_first;
irq_last = platform_get_irq_byname(plf, "IRQ_LAST");
if (irq_last < 0)
return irq_last;
ab8500_dir = debugfs_create_dir(AB8500_NAME_STRING, NULL);
debugfs_create_file("all-bank-registers", S_IRUGO, ab8500_dir,
&plf->dev, &ab8500_bank_registers_fops);
debugfs_create_file("all-banks", S_IRUGO, ab8500_dir,
&plf->dev, &ab8500_all_banks_fops);
debugfs_create_file("register-bank", (S_IRUGO | S_IWUSR | S_IWGRP),
ab8500_dir, &plf->dev, &ab8500_bank_fops);
debugfs_create_file("register-address", (S_IRUGO | S_IWUSR | S_IWGRP),
ab8500_dir, &plf->dev, &ab8500_address_fops);
debugfs_create_file("register-value", (S_IRUGO | S_IWUSR | S_IWGRP),
ab8500_dir, &plf->dev, &ab8500_val_fops);
debugfs_create_file("irq-subscribe", (S_IRUGO | S_IWUSR | S_IWGRP),
ab8500_dir, &plf->dev, &ab8500_subscribe_fops);
if (is_ab8500(ab8500)) {
debug_ranges = ab8500_debug_ranges;
num_interrupt_lines = AB8500_NR_IRQS;
} else if (is_ab8505(ab8500)) {
debug_ranges = ab8505_debug_ranges;
num_interrupt_lines = AB8505_NR_IRQS;
} else if (is_ab9540(ab8500)) {
debug_ranges = ab8505_debug_ranges;
num_interrupt_lines = AB9540_NR_IRQS;
} else if (is_ab8540(ab8500)) {
debug_ranges = ab8540_debug_ranges;
num_interrupt_lines = AB8540_NR_IRQS;
}
debugfs_create_file("interrupts", (S_IRUGO), ab8500_dir, &plf->dev,
&ab8500_interrupts_fops);
debugfs_create_file("irq-unsubscribe", (S_IRUGO | S_IWUSR | S_IWGRP),
ab8500_dir, &plf->dev, &ab8500_unsubscribe_fops);
debugfs_create_file("hwreg", (S_IRUGO | S_IWUSR | S_IWGRP), ab8500_dir,
&plf->dev, &ab8500_hwreg_fops);
debugfs_create_file("all-modem-registers", (S_IRUGO | S_IWUSR | S_IWGRP),
ab8500_dir, &plf->dev, &ab8500_modem_fops);
return 0;
}
static struct platform_driver ab8500_debug_driver = {
.driver = {
.name = "ab8500-debug",
.suppress_bind_attrs = true,
},
.probe = ab8500_debug_probe,
};
static int __init ab8500_debug_init(void)
{
return platform_driver_register(&ab8500_debug_driver);
}
subsys_initcall(ab8500_debug_init);
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