[net-next-2.6.git] / drivers / mfd / ab8500-debugfs.c

/*
 * 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");
Commit	Line	Data
5814fc35 MW	1	/*
	2	* Copyright (C) ST-Ericsson SA 2010
	3	*
	4	* Author: Mattias Wallin <mattias.wallin@stericsson.com> for ST-Ericsson.
	5	* License Terms: GNU General Public License v2
	6	*/
	7
	8	#include <linux/seq_file.h>
	9	#include <linux/uaccess.h>
	10	#include <linux/fs.h>
	11	#include <linux/debugfs.h>
	12	#include <linux/platform_device.h>
	13
	14	#include <linux/mfd/abx500.h>
	15	#include <linux/mfd/ab8500.h>
	16
	17	static u32 debug_bank;
	18	static u32 debug_address;
	19
	20	/**
	21	* struct ab8500_reg_range
	22	* @first: the first address of the range
	23	* @last: the last address of the range
	24	* @perm: access permissions for the range
	25	*/
	26	struct ab8500_reg_range {
	27	u8 first;
	28	u8 last;
	29	u8 perm;
	30	};
	31
	32	/**
	33	* struct ab8500_i2c_ranges
	34	* @num_ranges: the number of ranges in the list
	35	* @bankid: bank identifier
	36	* @range: the list of register ranges
	37	*/
	38	struct ab8500_i2c_ranges {
	39	u8 num_ranges;
	40	u8 bankid;
	41	const struct ab8500_reg_range *range;
	42	};
	43
	44	#define AB8500_NAME_STRING "ab8500"
	45	#define AB8500_NUM_BANKS 22
	46
	47	#define AB8500_REV_REG 0x80
	48
	49	static struct ab8500_i2c_ranges debug_ranges[AB8500_NUM_BANKS] = {
	50	[0x0] = {
	51	.num_ranges = 0,
	52	.range = 0,
	53	},
	54	[AB8500_SYS_CTRL1_BLOCK] = {
	55	.num_ranges = 3,
	56	.range = (struct ab8500_reg_range[]) {
	57	{
	58	.first = 0x00,
	59	.last = 0x02,
	60	},
	61	{
	62	.first = 0x42,
	63	.last = 0x42,
	64	},
65	{
66	.first = 0x80,
67	.last = 0x81,
68	},
69	},
70	},
71	[AB8500_SYS_CTRL2_BLOCK] = {
72	.num_ranges = 4,
73	.range = (struct ab8500_reg_range[]) {
74	{
75	.first = 0x00,
76	.last = 0x0D,
77	},
78	{
79	.first = 0x0F,
80	.last = 0x17,
81	},
82	{
83	.first = 0x30,
84	.last = 0x30,
85	},
86	{
87	.first = 0x32,
88	.last = 0x33,
89	},
90	},
91	},
92	[AB8500_REGU_CTRL1] = {
93	.num_ranges = 3,
94	.range = (struct ab8500_reg_range[]) {
95	{
96	.first = 0x00,
97	.last = 0x00,
98	},
99	{
100	.first = 0x03,
101	.last = 0x10,
102	},
103	{
104	.first = 0x80,
105	.last = 0x84,
106	},
107	},
108	},
109	[AB8500_REGU_CTRL2] = {
110	.num_ranges = 5,
111	.range = (struct ab8500_reg_range[]) {
112	{
113	.first = 0x00,
114	.last = 0x15,
115	},
116	{
117	.first = 0x17,
118	.last = 0x19,
119	},
120	{
121	.first = 0x1B,
122	.last = 0x1D,
123	},
124	{
125	.first = 0x1F,
126	.last = 0x22,
127	},
128	{
129	.first = 0x40,
130	.last = 0x44,
131	},
132	/* 0x80-0x8B is SIM registers and should
133	* not be accessed from here */
134	},
135	},
136	[AB8500_USB] = {
137	.num_ranges = 2,
138	.range = (struct ab8500_reg_range[]) {
139	{
140	.first = 0x80,
141	.last = 0x83,
142	},
143	{
144	.first = 0x87,
145	.last = 0x8A,
146	},
147	},
148	},
149	[AB8500_TVOUT] = {
150	.num_ranges = 9,
151	.range = (struct ab8500_reg_range[]) {
152	{
153	.first = 0x00,
154	.last = 0x12,
155	},
156	{
157	.first = 0x15,
158	.last = 0x17,
159	},
160	{
161	.first = 0x19,
162	.last = 0x21,
163	},
164	{
165	.first = 0x27,
166	.last = 0x2C,
167	},
168	{
169	.first = 0x41,
170	.last = 0x41,
171	},
172	{
173	.first = 0x45,
174	.last = 0x5B,
175	},
176	{
177	.first = 0x5D,
178	.last = 0x5D,
179	},
180	{
181	.first = 0x69,
182	.last = 0x69,
183	},
184	{
185	.first = 0x80,
186	.last = 0x81,
187	},
188	},
189	},
190	[AB8500_DBI] = {
191	.num_ranges = 0,
192	.range = 0,
193	},
194	[AB8500_ECI_AV_ACC] = {
195	.num_ranges = 1,
196	.range = (struct ab8500_reg_range[]) {
197	{
198	.first = 0x80,
199	.last = 0x82,
200	},
201	},
202	},
203	[0x9] = {
204	.num_ranges = 0,
205	.range = 0,
206	},
207	[AB8500_GPADC] = {
208	.num_ranges = 1,
209	.range = (struct ab8500_reg_range[]) {
210	{
211	.first = 0x00,
212	.last = 0x08,
213	},
214	},
215	},
216	[AB8500_CHARGER] = {
217	.num_ranges = 8,
218	.range = (struct ab8500_reg_range[]) {
219	{
220	.first = 0x00,
221	.last = 0x03,
222	},
223	{
224	.first = 0x05,
225	.last = 0x05,
226	},
227	{
228	.first = 0x40,
229	.last = 0x40,
230	},
231	{
232	.first = 0x42,
233	.last = 0x42,
234	},
235	{
236	.first = 0x44,
237	.last = 0x44,
238	},
239	{
240	.first = 0x50,
241	.last = 0x55,
242	},
243	{
244	.first = 0x80,
245	.last = 0x82,
246	},
247	{
248	.first = 0xC0,
249	.last = 0xC2,
250	},
251	},
252	},
253	[AB8500_GAS_GAUGE] = {
254	.num_ranges = 3,
255	.range = (struct ab8500_reg_range[]) {
256	{
257	.first = 0x00,
258	.last = 0x00,
259	},
260	{
261	.first = 0x07,
262	.last = 0x0A,
263	},
264	{
265	.first = 0x10,
266	.last = 0x14,
267	},
268	},
269	},
270	[AB8500_AUDIO] = {
271	.num_ranges = 1,
272	.range = (struct ab8500_reg_range[]) {
273	{
274	.first = 0x00,
275	.last = 0x6F,
276	},
277	},
278	},
279	[AB8500_INTERRUPT] = {
280	.num_ranges = 0,
281	.range = 0,
282	},
283	[AB8500_RTC] = {
284	.num_ranges = 1,
285	.range = (struct ab8500_reg_range[]) {
286	{
287	.first = 0x00,
288	.last = 0x0F,
289	},
290	},
291	},
292	[AB8500_MISC] = {
293	.num_ranges = 8,
294	.range = (struct ab8500_reg_range[]) {
295	{
296	.first = 0x00,
297	.last = 0x05,
298	},
299	{
300	.first = 0x10,
301	.last = 0x15,
302	},
303	{
304	.first = 0x20,
305	.last = 0x25,
306	},
307	{
308	.first = 0x30,
309	.last = 0x35,
310	},
311	{
312	.first = 0x40,
313	.last = 0x45,
314	},
315	{
316	.first = 0x50,
317	.last = 0x50,
318	},
319	{
320	.first = 0x60,
321	.last = 0x67,
322	},
323	{
324	.first = 0x80,
325	.last = 0x80,
326	},
327	},
328	},
329	[0x11] = {
330	.num_ranges = 0,
331	.range = 0,
332	},
333	[0x12] = {
334	.num_ranges = 0,
335	.range = 0,
336	},
337	[0x13] = {
338	.num_ranges = 0,
339	.range = 0,
340	},
341	[0x14] = {
342	.num_ranges = 0,
343	.range = 0,
344	},
345	[AB8500_OTP_EMUL] = {
346	.num_ranges = 1,
347	.range = (struct ab8500_reg_range[]) {
348	{
349	.first = 0x01,
350	.last = 0x0F,
351	},
352	},
353	},
354	};
355
356	static int ab8500_registers_print(struct seq_file s, void p)
357	{
358	struct device *dev = s->private;
359	unsigned int i;
360	u32 bank = debug_bank;
361
362	seq_printf(s, AB8500_NAME_STRING " register values:\n");
363
364	seq_printf(s, " bank %u:\n", bank);
365	for (i = 0; i < debug_ranges[bank].num_ranges; i++) {
366	u32 reg;
367
368	for (reg = debug_ranges[bank].range[i].first;
369	reg <= debug_ranges[bank].range[i].last;
370	reg++) {
371	u8 value;
372	int err;
373
374	err = abx500_get_register_interruptible(dev,
375	(u8)bank, (u8)reg, &value);
376	if (err < 0) {
377	dev_err(dev, "ab->read fail %d\n", err);
378	return err;
379	}
380
381	err = seq_printf(s, " [%u/0x%02X]: 0x%02X\n", bank,
382	reg, value);
383	if (err < 0) {
384	dev_err(dev, "seq_printf overflow\n");
385	/* Error is not returned here since
386	* the output is wanted in any case */
387	return 0;
388	}
389	}
390	}
391	return 0;
392	}
393
394	static int ab8500_registers_open(struct inode inode, struct file file)
395	{
396	return single_open(file, ab8500_registers_print, inode->i_private);
397	}
398
399	static const struct file_operations ab8500_registers_fops = {
400	.open = ab8500_registers_open,
401	.read = seq_read,
402	.llseek = seq_lseek,
403	.release = single_release,
404	.owner = THIS_MODULE,
405	};
406
407	static int ab8500_bank_print(struct seq_file s, void p)
408	{
409	return seq_printf(s, "%d\n", debug_bank);
410	}
411
412	static int ab8500_bank_open(struct inode inode, struct file file)
413	{
414	return single_open(file, ab8500_bank_print, inode->i_private);
415	}
416
417	static ssize_t ab8500_bank_write(struct file *file,
418	const char __user *user_buf,
419	size_t count, loff_t *ppos)
420	{
421	struct device dev = ((struct seq_file )(file->private_data))->private;
422	char buf[32];
423	int buf_size;
424	unsigned long user_bank;
425	int err;
426
427	/* Get userspace string and assure termination */
428	buf_size = min(count, (sizeof(buf) - 1));
429	if (copy_from_user(buf, user_buf, buf_size))
430	return -EFAULT;
431	buf[buf_size] = 0;
432
433	err = strict_strtoul(buf, 0, &user_bank);
434	if (err)
435	return -EINVAL;
436
437	if (user_bank >= AB8500_NUM_BANKS) {
438	dev_err(dev, "debugfs error input > number of banks\n");
439	return -EINVAL;
440	}
441
442	debug_bank = user_bank;
443
444	return buf_size;
445	}
446
447	static int ab8500_address_print(struct seq_file s, void p)
448	{
449	return seq_printf(s, "0x%02X\n", debug_address);
450	}
451
452	static int ab8500_address_open(struct inode inode, struct file file)
453	{
454	return single_open(file, ab8500_address_print, inode->i_private);
455	}
456
457	static ssize_t ab8500_address_write(struct file *file,
458	const char __user *user_buf,
459	size_t count, loff_t *ppos)
460	{
461	struct device dev = ((struct seq_file )(file->private_data))->private;
462	char buf[32];
463	int buf_size;
464	unsigned long user_address;
465	int err;
466
467	/* Get userspace string and assure termination */
468	buf_size = min(count, (sizeof(buf) - 1));
469	if (copy_from_user(buf, user_buf, buf_size))
470	return -EFAULT;
471	buf[buf_size] = 0;
472
473	err = strict_strtoul(buf, 0, &user_address);
474	if (err)
475	return -EINVAL;
476	if (user_address > 0xff) {
477	dev_err(dev, "debugfs error input > 0xff\n");
478	return -EINVAL;
479	}
480	debug_address = user_address;
481	return buf_size;
482	}
483
484	static int ab8500_val_print(struct seq_file s, void p)
485	{
486	struct device *dev = s->private;
487	int ret;
488	u8 regvalue;
489
490	ret = abx500_get_register_interruptible(dev,
491	(u8)debug_bank, (u8)debug_address, &regvalue);
492	if (ret < 0) {
493	dev_err(dev, "abx500_get_reg fail %d, %d\n",
494	ret, __LINE__);
495	return -EINVAL;
496	}
497	seq_printf(s, "0x%02X\n", regvalue);
498
499	return 0;
500	}
501
502	static int ab8500_val_open(struct inode inode, struct file file)
503	{
504	return single_open(file, ab8500_val_print, inode->i_private);
505	}
506
507	static ssize_t ab8500_val_write(struct file *file,
508	const char __user *user_buf,
509	size_t count, loff_t *ppos)
510	{
511	struct device dev = ((struct seq_file )(file->private_data))->private;
512	char buf[32];
513	int buf_size;
514	unsigned long user_val;
515	int err;
516
517	/* Get userspace string and assure termination */
518	buf_size = min(count, (sizeof(buf)-1));
519	if (copy_from_user(buf, user_buf, buf_size))
520	return -EFAULT;
521	buf[buf_size] = 0;
522
523	err = strict_strtoul(buf, 0, &user_val);
524	if (err)
525	return -EINVAL;
526	if (user_val > 0xff) {
527	dev_err(dev, "debugfs error input > 0xff\n");
528	return -EINVAL;
529	}
530	err = abx500_set_register_interruptible(dev,
531	(u8)debug_bank, debug_address, (u8)user_val);
532	if (err < 0) {
533	printk(KERN_ERR "abx500_set_reg failed %d, %d", err, __LINE__);
534	return -EINVAL;
535	}
536
537	return buf_size;
538	}
539
540	static const struct file_operations ab8500_bank_fops = {
541	.open = ab8500_bank_open,
542	.write = ab8500_bank_write,
543	.read = seq_read,
544	.llseek = seq_lseek,
545	.release = single_release,
546	.owner = THIS_MODULE,
547	};
548
549	static const struct file_operations ab8500_address_fops = {
550	.open = ab8500_address_open,
551	.write = ab8500_address_write,
552	.read = seq_read,
553	.llseek = seq_lseek,
554	.release = single_release,
555	.owner = THIS_MODULE,
556	};
557
558	static const struct file_operations ab8500_val_fops = {
559	.open = ab8500_val_open,
560	.write = ab8500_val_write,
561	.read = seq_read,
562	.llseek = seq_lseek,
563	.release = single_release,
564	.owner = THIS_MODULE,
565	};
566
567	static struct dentry *ab8500_dir;
568	static struct dentry *ab8500_reg_file;
569	static struct dentry *ab8500_bank_file;
570	static struct dentry *ab8500_address_file;
571	static struct dentry *ab8500_val_file;
572
573	static int __devinit ab8500_debug_probe(struct platform_device *plf)
574	{
575	debug_bank = AB8500_MISC;
576	debug_address = AB8500_REV_REG & 0x00FF;
577
578	ab8500_dir = debugfs_create_dir(AB8500_NAME_STRING, NULL);
579	if (!ab8500_dir)
580	goto exit_no_debugfs;
581
582	ab8500_reg_file = debugfs_create_file("all-bank-registers",
583	S_IRUGO, ab8500_dir, &plf->dev, &ab8500_registers_fops);
584	if (!ab8500_reg_file)
585	goto exit_destroy_dir;
586
587	ab8500_bank_file = debugfs_create_file("register-bank",
588	(S_IRUGO \| S_IWUGO), ab8500_dir, &plf->dev, &ab8500_bank_fops);
589	if (!ab8500_bank_file)
590	goto exit_destroy_reg;
591
592	ab8500_address_file = debugfs_create_file("register-address",
593	(S_IRUGO \| S_IWUGO), ab8500_dir, &plf->dev,
594	&ab8500_address_fops);
595	if (!ab8500_address_file)
596	goto exit_destroy_bank;
597
598	ab8500_val_file = debugfs_create_file("register-value",
599	(S_IRUGO \| S_IWUGO), ab8500_dir, &plf->dev, &ab8500_val_fops);
600	if (!ab8500_val_file)
601	goto exit_destroy_address;
602
603	return 0;
604
605	exit_destroy_address:
606	debugfs_remove(ab8500_address_file);
607	exit_destroy_bank:
608	debugfs_remove(ab8500_bank_file);
609	exit_destroy_reg:
610	debugfs_remove(ab8500_reg_file);
611	exit_destroy_dir:
612	debugfs_remove(ab8500_dir);
613	exit_no_debugfs:
614	dev_err(&plf->dev, "failed to create debugfs entries.\n");
615	return -ENOMEM;
616	}
617
618	static int __devexit ab8500_debug_remove(struct platform_device *plf)
619	{
620	debugfs_remove(ab8500_val_file);
621	debugfs_remove(ab8500_address_file);
622	debugfs_remove(ab8500_bank_file);
623	debugfs_remove(ab8500_reg_file);
624	debugfs_remove(ab8500_dir);
625
626	return 0;
627	}
628
629	static struct platform_driver ab8500_debug_driver = {
630	.driver = {
631	.name = "ab8500-debug",
632	.owner = THIS_MODULE,
633	},
634	.probe = ab8500_debug_probe,
635	.remove = __devexit_p(ab8500_debug_remove)
636	};
637
638	static int __init ab8500_debug_init(void)
639	{
640	return platform_driver_register(&ab8500_debug_driver);
641	}
642
643	static void __exit ab8500_debug_exit(void)
644	{
645	platform_driver_unregister(&ab8500_debug_driver);
646	}
647	subsys_initcall(ab8500_debug_init);
648	module_exit(ab8500_debug_exit);
649
650	MODULE_AUTHOR("Mattias WALLIN <mattias.wallin@stericsson.com");
651	MODULE_DESCRIPTION("AB8500 DEBUG");
652	MODULE_LICENSE("GPL v2");