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mfd: AB8500 debugfs

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This patch adds the possibility to read and write registers
via the debug_fs. It also adds ranges of registers sorted by bank
which makes it possible to read all defined registers in a bank.

Signed-off-by: Mattias Wallin <mattias.wallin@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mattias Wallin 2010-09-13 16:05:04 +02:00 committed by Samuel Ortiz
parent 38b340527a
commit 5814fc35e1
4 changed files with 666 additions and 0 deletions
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8
drivers/mfd/Kconfig
View File

@ -483,6 +483,14 @@ config AB8500_CORE
read/write functions for the devices to get access to this chip.
This chip embeds various other multimedia funtionalities as well.
config AB8500_DEBUG
bool "Enable debug info via debugfs"
depends on AB8500_CORE && DEBUG_FS
default y if DEBUG_FS
help
Select this option if you want debug information using the debug
filesystem, debugfs.
config AB3550_CORE
bool "ST-Ericsson AB3550 Mixed Signal Circuit core functions"
select MFD_CORE

1
drivers/mfd/Makefile
View File

@ -69,6 +69,7 @@ obj-$(CONFIG_AB3100_CORE) += ab3100-core.o
obj-$(CONFIG_AB3100_OTP) += ab3100-otp.o
obj-$(CONFIG_AB3550_CORE) += ab3550-core.o
obj-$(CONFIG_AB8500_CORE) += ab8500-core.o ab8500-spi.o
obj-$(CONFIG_AB8500_DEBUG) += ab8500-debugfs.o
obj-$(CONFIG_MFD_TIMBERDALE) += timberdale.o
obj-$(CONFIG_PMIC_ADP5520) += adp5520.o
obj-$(CONFIG_LPC_SCH) += lpc_sch.o

5
drivers/mfd/ab8500-core.c
View File

@ -394,6 +394,11 @@ static struct resource ab8500_poweronkey_db_resources[] = {
};
static struct mfd_cell ab8500_devs[] = {
#ifdef CONFIG_DEBUG_FS
{
.name = "ab8500-debug",
},
#endif
{
.name = "ab8500-gpadc",
.num_resources = ARRAY_SIZE(ab8500_gpadc_resources),

652
drivers/mfd/ab8500-debugfs.c Normal file
View File

@ -0,0 +1,652 @@
/*
* Copyright (C) ST-Ericsson SA 2010
*
* Author: Mattias Wallin <mattias.wallin@stericsson.com> for ST-Ericsson.
* License Terms: GNU General Public License v2
*/
#include <linux/seq_file.h>
#include <linux/uaccess.h>
#include <linux/fs.h>
#include <linux/debugfs.h>
#include <linux/platform_device.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/ab8500.h>
static u32 debug_bank;
static u32 debug_address;
/**
* 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_i2c_ranges
* @num_ranges: the number of ranges in the list
* @bankid: bank identifier
* @range: the list of register ranges
*/
struct ab8500_i2c_ranges {
u8 num_ranges;
u8 bankid;
const struct ab8500_reg_range *range;
};
#define AB8500_NAME_STRING "ab8500"
#define AB8500_NUM_BANKS 22
#define AB8500_REV_REG 0x80
static struct ab8500_i2c_ranges debug_ranges[AB8500_NUM_BANKS] = {
[0x0] = {
.num_ranges = 0,
.range = 0,
},
[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 is 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 = 0,
},
[AB8500_ECI_AV_ACC] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x80,
.last = 0x82,
},
},
},
[0x9] = {
.num_ranges = 0,
.range = 0,
},
[AB8500_GPADC] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x00,
.last = 0x08,
},
},
},
[AB8500_CHARGER] = {
.num_ranges = 8,
.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,
},
},
},
[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 = 0,
},
[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,
},
},
},
[0x11] = {
.num_ranges = 0,
.range = 0,
},
[0x12] = {
.num_ranges = 0,
.range = 0,
},
[0x13] = {
.num_ranges = 0,
.range = 0,
},
[0x14] = {
.num_ranges = 0,
.range = 0,
},
[AB8500_OTP_EMUL] = {
.num_ranges = 1,
.range = (struct ab8500_reg_range[]) {
{
.first = 0x01,
.last = 0x0F,
},
},
},
};
static int ab8500_registers_print(struct seq_file *s, void *p)
{
struct device *dev = s->private;
unsigned int i;
u32 bank = debug_bank;
seq_printf(s, AB8500_NAME_STRING " register values:\n");
seq_printf(s, " bank %u:\n", bank);
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;
}
err = seq_printf(s, " [%u/0x%02X]: 0x%02X\n", bank,
reg, value);
if (err < 0) {
dev_err(dev, "seq_printf overflow\n");
/* Error is not returned here since
* the output is wanted in any case */
return 0;
}
}
}
return 0;
}
static int ab8500_registers_open(struct inode *inode, struct file *file)
{
return single_open(file, ab8500_registers_print, inode->i_private);
}
static const struct file_operations ab8500_registers_fops = {
.open = ab8500_registers_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static int ab8500_bank_print(struct seq_file *s, void *p)
{
return seq_printf(s, "%d\n", debug_bank);
}
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;
char buf[32];
int buf_size;
unsigned long user_bank;
int err;
/* Get userspace string and assure termination */
buf_size = min(count, (sizeof(buf) - 1));
if (copy_from_user(buf, user_buf, buf_size))
return -EFAULT;
buf[buf_size] = 0;
err = strict_strtoul(buf, 0, &user_bank);
if (err)
return -EINVAL;
if (user_bank >= AB8500_NUM_BANKS) {
dev_err(dev, "debugfs error input > number of banks\n");
return -EINVAL;
}
debug_bank = user_bank;
return buf_size;
}
static int ab8500_address_print(struct seq_file *s, void *p)
{
return seq_printf(s, "0x%02X\n", debug_address);
}
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;
char buf[32];
int buf_size;
unsigned long user_address;
int err;
/* Get userspace string and assure termination */
buf_size = min(count, (sizeof(buf) - 1));
if (copy_from_user(buf, user_buf, buf_size))
return -EFAULT;
buf[buf_size] = 0;
err = strict_strtoul(buf, 0, &user_address);
if (err)
return -EINVAL;
if (user_address > 0xff) {
dev_err(dev, "debugfs error input > 0xff\n");
return -EINVAL;
}
debug_address = user_address;
return buf_size;
}
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;
char buf[32];
int buf_size;
unsigned long user_val;
int err;
/* Get userspace string and assure termination */
buf_size = min(count, (sizeof(buf)-1));
if (copy_from_user(buf, user_buf, buf_size))
return -EFAULT;
buf[buf_size] = 0;
err = strict_strtoul(buf, 0, &user_val);
if (err)
return -EINVAL;
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) {
printk(KERN_ERR "abx500_set_reg failed %d, %d", err, __LINE__);
return -EINVAL;
}
return buf_size;
}
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 struct dentry *ab8500_dir;
static struct dentry *ab8500_reg_file;
static struct dentry *ab8500_bank_file;
static struct dentry *ab8500_address_file;
static struct dentry *ab8500_val_file;
static int __devinit ab8500_debug_probe(struct platform_device *plf)
{
debug_bank = AB8500_MISC;
debug_address = AB8500_REV_REG & 0x00FF;
ab8500_dir = debugfs_create_dir(AB8500_NAME_STRING, NULL);
if (!ab8500_dir)
goto exit_no_debugfs;
ab8500_reg_file = debugfs_create_file("all-bank-registers",
S_IRUGO, ab8500_dir, &plf->dev, &ab8500_registers_fops);
if (!ab8500_reg_file)
goto exit_destroy_dir;
ab8500_bank_file = debugfs_create_file("register-bank",
(S_IRUGO | S_IWUGO), ab8500_dir, &plf->dev, &ab8500_bank_fops);
if (!ab8500_bank_file)
goto exit_destroy_reg;
ab8500_address_file = debugfs_create_file("register-address",
(S_IRUGO | S_IWUGO), ab8500_dir, &plf->dev,
&ab8500_address_fops);
if (!ab8500_address_file)
goto exit_destroy_bank;
ab8500_val_file = debugfs_create_file("register-value",
(S_IRUGO | S_IWUGO), ab8500_dir, &plf->dev, &ab8500_val_fops);
if (!ab8500_val_file)
goto exit_destroy_address;
return 0;
exit_destroy_address:
debugfs_remove(ab8500_address_file);
exit_destroy_bank:
debugfs_remove(ab8500_bank_file);
exit_destroy_reg:
debugfs_remove(ab8500_reg_file);
exit_destroy_dir:
debugfs_remove(ab8500_dir);
exit_no_debugfs:
dev_err(&plf->dev, "failed to create debugfs entries.\n");
return -ENOMEM;
}
static int __devexit ab8500_debug_remove(struct platform_device *plf)
{
debugfs_remove(ab8500_val_file);
debugfs_remove(ab8500_address_file);
debugfs_remove(ab8500_bank_file);
debugfs_remove(ab8500_reg_file);
debugfs_remove(ab8500_dir);
return 0;
}
static struct platform_driver ab8500_debug_driver = {
.driver = {
.name = "ab8500-debug",
.owner = THIS_MODULE,
},
.probe = ab8500_debug_probe,
.remove = __devexit_p(ab8500_debug_remove)
};
static int __init ab8500_debug_init(void)
{
return platform_driver_register(&ab8500_debug_driver);
}
static void __exit ab8500_debug_exit(void)
{
platform_driver_unregister(&ab8500_debug_driver);
}
subsys_initcall(ab8500_debug_init);
module_exit(ab8500_debug_exit);
MODULE_AUTHOR("Mattias WALLIN <mattias.wallin@stericsson.com");
MODULE_DESCRIPTION("AB8500 DEBUG");
MODULE_LICENSE("GPL v2");