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linux/drivers/media/video/pvrusb2/pvrusb2-sysfs.c
Tejun Heo 4f393828d1 V4L/DVB (5573): Pvrusb2: kill unnecessary attribute->owner 
sysfs is now completely out of driver/module lifetime game.

After deletion, a sysfs node doesn't access anything outside sysfs 
proper, so there's no reason to hold onto the attribute owners.

Note that often the wrong modules were accounted for as owners leading 
to accessing removed modules. 

This patch kills now unnecessary attribute->owner.  

Note that with this change, userland holding a sysfs node does not 
prevent the backing module from being unloaded. 

For more info regarding lifetime rule cleanup, please read the following 
message:
	http://article.gmane.org/gmane.linux.kernel/510293

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2007-05-09 10:12:32 -03:00

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/*
*
* $Id$
*
* Copyright (C) 2005 Mike Isely <isely@pobox.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/string.h>
#include <linux/slab.h>
#include <asm/semaphore.h>
#include "pvrusb2-sysfs.h"
#include "pvrusb2-hdw.h"
#include "pvrusb2-debug.h"
#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
#include "pvrusb2-debugifc.h"
#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
#define pvr2_sysfs_trace(...) pvr2_trace(PVR2_TRACE_SYSFS,__VA_ARGS__)
struct pvr2_sysfs {
struct pvr2_channel channel;
struct class_device *class_dev;
#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
struct pvr2_sysfs_debugifc *debugifc;
#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
struct pvr2_sysfs_ctl_item *item_first;
struct pvr2_sysfs_ctl_item *item_last;
struct class_device_attribute attr_v4l_minor_number;
struct class_device_attribute attr_v4l_radio_minor_number;
struct class_device_attribute attr_unit_number;
struct class_device_attribute attr_bus_info;
int v4l_minor_number_created_ok;
int v4l_radio_minor_number_created_ok;
int unit_number_created_ok;
int bus_info_created_ok;
};
#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
struct pvr2_sysfs_debugifc {
struct class_device_attribute attr_debugcmd;
struct class_device_attribute attr_debuginfo;
int debugcmd_created_ok;
int debuginfo_created_ok;
};
#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
struct pvr2_sysfs_ctl_item {
struct class_device_attribute attr_name;
struct class_device_attribute attr_type;
struct class_device_attribute attr_min;
struct class_device_attribute attr_max;
struct class_device_attribute attr_enum;
struct class_device_attribute attr_bits;
struct class_device_attribute attr_val;
struct class_device_attribute attr_custom;
struct pvr2_ctrl *cptr;
struct pvr2_sysfs *chptr;
struct pvr2_sysfs_ctl_item *item_next;
struct attribute *attr_gen[7];
struct attribute_group grp;
int created_ok;
char name[80];
};
struct pvr2_sysfs_class {
struct class class;
};
static ssize_t show_name(int id,struct class_device *class_dev,char *buf)
{
struct pvr2_ctrl *cptr;
struct pvr2_sysfs *sfp;
const char *name;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
if (!cptr) return -EINVAL;
name = pvr2_ctrl_get_desc(cptr);
pvr2_sysfs_trace("pvr2_sysfs(%p) show_name(cid=%d) is %s",sfp,id,name);
if (!name) return -EINVAL;
return scnprintf(buf,PAGE_SIZE,"%s\n",name);
}
static ssize_t show_type(int id,struct class_device *class_dev,char *buf)
{
struct pvr2_ctrl *cptr;
struct pvr2_sysfs *sfp;
const char *name;
enum pvr2_ctl_type tp;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
if (!cptr) return -EINVAL;
tp = pvr2_ctrl_get_type(cptr);
switch (tp) {
case pvr2_ctl_int: name = "integer"; break;
case pvr2_ctl_enum: name = "enum"; break;
case pvr2_ctl_bitmask: name = "bitmask"; break;
case pvr2_ctl_bool: name = "boolean"; break;
default: name = "?"; break;
}
pvr2_sysfs_trace("pvr2_sysfs(%p) show_type(cid=%d) is %s",sfp,id,name);
if (!name) return -EINVAL;
return scnprintf(buf,PAGE_SIZE,"%s\n",name);
}
static ssize_t show_min(int id,struct class_device *class_dev,char *buf)
{
struct pvr2_ctrl *cptr;
struct pvr2_sysfs *sfp;
long val;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
if (!cptr) return -EINVAL;
val = pvr2_ctrl_get_min(cptr);
pvr2_sysfs_trace("pvr2_sysfs(%p) show_min(cid=%d) is %ld",sfp,id,val);
return scnprintf(buf,PAGE_SIZE,"%ld\n",val);
}
static ssize_t show_max(int id,struct class_device *class_dev,char *buf)
{
struct pvr2_ctrl *cptr;
struct pvr2_sysfs *sfp;
long val;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
if (!cptr) return -EINVAL;
val = pvr2_ctrl_get_max(cptr);
pvr2_sysfs_trace("pvr2_sysfs(%p) show_max(cid=%d) is %ld",sfp,id,val);
return scnprintf(buf,PAGE_SIZE,"%ld\n",val);
}
static ssize_t show_val_norm(int id,struct class_device *class_dev,char *buf)
{
struct pvr2_ctrl *cptr;
struct pvr2_sysfs *sfp;
int val,ret;
unsigned int cnt = 0;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
if (!cptr) return -EINVAL;
ret = pvr2_ctrl_get_value(cptr,&val);
if (ret < 0) return ret;
ret = pvr2_ctrl_value_to_sym(cptr,~0,val,
buf,PAGE_SIZE-1,&cnt);
pvr2_sysfs_trace("pvr2_sysfs(%p) show_val_norm(cid=%d) is %.*s (%d)",
sfp,id,cnt,buf,val);
buf[cnt] = '\n';
return cnt+1;
}
static ssize_t show_val_custom(int id,struct class_device *class_dev,char *buf)
{
struct pvr2_ctrl *cptr;
struct pvr2_sysfs *sfp;
int val,ret;
unsigned int cnt = 0;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
if (!cptr) return -EINVAL;
ret = pvr2_ctrl_get_value(cptr,&val);
if (ret < 0) return ret;
ret = pvr2_ctrl_custom_value_to_sym(cptr,~0,val,
buf,PAGE_SIZE-1,&cnt);
pvr2_sysfs_trace("pvr2_sysfs(%p) show_val_custom(cid=%d) is %.*s (%d)",
sfp,id,cnt,buf,val);
buf[cnt] = '\n';
return cnt+1;
}
static ssize_t show_enum(int id,struct class_device *class_dev,char *buf)
{
struct pvr2_ctrl *cptr;
struct pvr2_sysfs *sfp;
long val;
unsigned int bcnt,ccnt,ecnt;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
if (!cptr) return -EINVAL;
ecnt = pvr2_ctrl_get_cnt(cptr);
bcnt = 0;
for (val = 0; val < ecnt; val++) {
pvr2_ctrl_get_valname(cptr,val,buf+bcnt,PAGE_SIZE-bcnt,&ccnt);
if (!ccnt) continue;
bcnt += ccnt;
if (bcnt >= PAGE_SIZE) break;
buf[bcnt] = '\n';
bcnt++;
}
pvr2_sysfs_trace("pvr2_sysfs(%p) show_enum(cid=%d)",sfp,id);
return bcnt;
}
static ssize_t show_bits(int id,struct class_device *class_dev,char *buf)
{
struct pvr2_ctrl *cptr;
struct pvr2_sysfs *sfp;
int valid_bits,msk;
unsigned int bcnt,ccnt;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
if (!cptr) return -EINVAL;
valid_bits = pvr2_ctrl_get_mask(cptr);
bcnt = 0;
for (msk = 1; valid_bits; msk <<= 1) {
if (!(msk & valid_bits)) continue;
valid_bits &= ~msk;
pvr2_ctrl_get_valname(cptr,msk,buf+bcnt,PAGE_SIZE-bcnt,&ccnt);
bcnt += ccnt;
if (bcnt >= PAGE_SIZE) break;
buf[bcnt] = '\n';
bcnt++;
}
pvr2_sysfs_trace("pvr2_sysfs(%p) show_bits(cid=%d)",sfp,id);
return bcnt;
}
static int store_val_any(int id,int customfl,struct pvr2_sysfs *sfp,
const char *buf,unsigned int count)
{
struct pvr2_ctrl *cptr;
int ret;
int mask,val;
cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,id);
if (customfl) {
ret = pvr2_ctrl_custom_sym_to_value(cptr,buf,count,&mask,&val);
} else {
ret = pvr2_ctrl_sym_to_value(cptr,buf,count,&mask,&val);
}
if (ret < 0) return ret;
ret = pvr2_ctrl_set_mask_value(cptr,mask,val);
pvr2_hdw_commit_ctl(sfp->channel.hdw);
return ret;
}
static ssize_t store_val_norm(int id,struct class_device *class_dev,
const char *buf,size_t count)
{
struct pvr2_sysfs *sfp;
int ret;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
ret = store_val_any(id,0,sfp,buf,count);
if (!ret) ret = count;
return ret;
}
static ssize_t store_val_custom(int id,struct class_device *class_dev,
const char *buf,size_t count)
{
struct pvr2_sysfs *sfp;
int ret;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
ret = store_val_any(id,1,sfp,buf,count);
if (!ret) ret = count;
return ret;
}
/*
Mike Isely <isely@pobox.com> 30-April-2005
This next batch of horrible preprocessor hackery is needed because the
kernel's class_device_attribute mechanism fails to pass the actual
attribute through to the show / store functions, which means we have no
way to package up any attribute-specific parameters, like for example the
control id. So we work around this brain-damage by encoding the control
id into the show / store functions themselves and pick the function based
on the control id we're setting up. These macros try to ease the pain.
Yuck.
*/
#define CREATE_SHOW_INSTANCE(sf_name,ctl_id) \
static ssize_t sf_name##_##ctl_id(struct class_device *class_dev,char *buf) \
{ return sf_name(ctl_id,class_dev,buf); }
#define CREATE_STORE_INSTANCE(sf_name,ctl_id) \
static ssize_t sf_name##_##ctl_id(struct class_device *class_dev,const char *buf,size_t count) \
{ return sf_name(ctl_id,class_dev,buf,count); }
#define CREATE_BATCH(ctl_id) \
CREATE_SHOW_INSTANCE(show_name,ctl_id) \
CREATE_SHOW_INSTANCE(show_type,ctl_id) \
CREATE_SHOW_INSTANCE(show_min,ctl_id) \
CREATE_SHOW_INSTANCE(show_max,ctl_id) \
CREATE_SHOW_INSTANCE(show_val_norm,ctl_id) \
CREATE_SHOW_INSTANCE(show_val_custom,ctl_id) \
CREATE_SHOW_INSTANCE(show_enum,ctl_id) \
CREATE_SHOW_INSTANCE(show_bits,ctl_id) \
CREATE_STORE_INSTANCE(store_val_norm,ctl_id) \
CREATE_STORE_INSTANCE(store_val_custom,ctl_id) \
CREATE_BATCH(0)
CREATE_BATCH(1)
CREATE_BATCH(2)
CREATE_BATCH(3)
CREATE_BATCH(4)
CREATE_BATCH(5)
CREATE_BATCH(6)
CREATE_BATCH(7)
CREATE_BATCH(8)
CREATE_BATCH(9)
CREATE_BATCH(10)
CREATE_BATCH(11)
CREATE_BATCH(12)
CREATE_BATCH(13)
CREATE_BATCH(14)
CREATE_BATCH(15)
CREATE_BATCH(16)
CREATE_BATCH(17)
CREATE_BATCH(18)
CREATE_BATCH(19)
CREATE_BATCH(20)
CREATE_BATCH(21)
CREATE_BATCH(22)
CREATE_BATCH(23)
CREATE_BATCH(24)
CREATE_BATCH(25)
CREATE_BATCH(26)
CREATE_BATCH(27)
CREATE_BATCH(28)
CREATE_BATCH(29)
CREATE_BATCH(30)
CREATE_BATCH(31)
CREATE_BATCH(32)
CREATE_BATCH(33)
CREATE_BATCH(34)
CREATE_BATCH(35)
CREATE_BATCH(36)
CREATE_BATCH(37)
CREATE_BATCH(38)
CREATE_BATCH(39)
CREATE_BATCH(40)
CREATE_BATCH(41)
CREATE_BATCH(42)
CREATE_BATCH(43)
CREATE_BATCH(44)
CREATE_BATCH(45)
CREATE_BATCH(46)
CREATE_BATCH(47)
CREATE_BATCH(48)
CREATE_BATCH(49)
CREATE_BATCH(50)
CREATE_BATCH(51)
CREATE_BATCH(52)
CREATE_BATCH(53)
CREATE_BATCH(54)
CREATE_BATCH(55)
CREATE_BATCH(56)
CREATE_BATCH(57)
CREATE_BATCH(58)
CREATE_BATCH(59)
struct pvr2_sysfs_func_set {
ssize_t (*show_name)(struct class_device *,char *);
ssize_t (*show_type)(struct class_device *,char *);
ssize_t (*show_min)(struct class_device *,char *);
ssize_t (*show_max)(struct class_device *,char *);
ssize_t (*show_enum)(struct class_device *,char *);
ssize_t (*show_bits)(struct class_device *,char *);
ssize_t (*show_val_norm)(struct class_device *,char *);
ssize_t (*store_val_norm)(struct class_device *,
const char *,size_t);
ssize_t (*show_val_custom)(struct class_device *,char *);
ssize_t (*store_val_custom)(struct class_device *,
const char *,size_t);
};
#define INIT_BATCH(ctl_id) \
[ctl_id] = { \
.show_name = show_name_##ctl_id, \
.show_type = show_type_##ctl_id, \
.show_min = show_min_##ctl_id, \
.show_max = show_max_##ctl_id, \
.show_enum = show_enum_##ctl_id, \
.show_bits = show_bits_##ctl_id, \
.show_val_norm = show_val_norm_##ctl_id, \
.store_val_norm = store_val_norm_##ctl_id, \
.show_val_custom = show_val_custom_##ctl_id, \
.store_val_custom = store_val_custom_##ctl_id, \
} \
static struct pvr2_sysfs_func_set funcs[] = {
INIT_BATCH(0),
INIT_BATCH(1),
INIT_BATCH(2),
INIT_BATCH(3),
INIT_BATCH(4),
INIT_BATCH(5),
INIT_BATCH(6),
INIT_BATCH(7),
INIT_BATCH(8),
INIT_BATCH(9),
INIT_BATCH(10),
INIT_BATCH(11),
INIT_BATCH(12),
INIT_BATCH(13),
INIT_BATCH(14),
INIT_BATCH(15),
INIT_BATCH(16),
INIT_BATCH(17),
INIT_BATCH(18),
INIT_BATCH(19),
INIT_BATCH(20),
INIT_BATCH(21),
INIT_BATCH(22),
INIT_BATCH(23),
INIT_BATCH(24),
INIT_BATCH(25),
INIT_BATCH(26),
INIT_BATCH(27),
INIT_BATCH(28),
INIT_BATCH(29),
INIT_BATCH(30),
INIT_BATCH(31),
INIT_BATCH(32),
INIT_BATCH(33),
INIT_BATCH(34),
INIT_BATCH(35),
INIT_BATCH(36),
INIT_BATCH(37),
INIT_BATCH(38),
INIT_BATCH(39),
INIT_BATCH(40),
INIT_BATCH(41),
INIT_BATCH(42),
INIT_BATCH(43),
INIT_BATCH(44),
INIT_BATCH(45),
INIT_BATCH(46),
INIT_BATCH(47),
INIT_BATCH(48),
INIT_BATCH(49),
INIT_BATCH(50),
INIT_BATCH(51),
INIT_BATCH(52),
INIT_BATCH(53),
INIT_BATCH(54),
INIT_BATCH(55),
INIT_BATCH(56),
INIT_BATCH(57),
INIT_BATCH(58),
INIT_BATCH(59),
};
static void pvr2_sysfs_add_control(struct pvr2_sysfs *sfp,int ctl_id)
{
struct pvr2_sysfs_ctl_item *cip;
struct pvr2_sysfs_func_set *fp;
struct pvr2_ctrl *cptr;
unsigned int cnt,acnt;
int ret;
if ((ctl_id < 0) || (ctl_id >= ARRAY_SIZE(funcs))) {
return;
}
fp = funcs + ctl_id;
cptr = pvr2_hdw_get_ctrl_by_index(sfp->channel.hdw,ctl_id);
if (!cptr) return;
cip = kzalloc(sizeof(*cip),GFP_KERNEL);
if (!cip) return;
pvr2_sysfs_trace("Creating pvr2_sysfs_ctl_item id=%p",cip);
cip->cptr = cptr;
cip->chptr = sfp;
cip->item_next = NULL;
if (sfp->item_last) {
sfp->item_last->item_next = cip;
} else {
sfp->item_first = cip;
}
sfp->item_last = cip;
cip->attr_name.attr.name = "name";
cip->attr_name.attr.mode = S_IRUGO;
cip->attr_name.show = fp->show_name;
cip->attr_type.attr.name = "type";
cip->attr_type.attr.mode = S_IRUGO;
cip->attr_type.show = fp->show_type;
cip->attr_min.attr.name = "min_val";
cip->attr_min.attr.mode = S_IRUGO;
cip->attr_min.show = fp->show_min;
cip->attr_max.attr.name = "max_val";
cip->attr_max.attr.mode = S_IRUGO;
cip->attr_max.show = fp->show_max;
cip->attr_val.attr.name = "cur_val";
cip->attr_val.attr.mode = S_IRUGO;
cip->attr_custom.attr.name = "custom_val";
cip->attr_custom.attr.mode = S_IRUGO;
cip->attr_enum.attr.name = "enum_val";
cip->attr_enum.attr.mode = S_IRUGO;
cip->attr_enum.show = fp->show_enum;
cip->attr_bits.attr.name = "bit_val";
cip->attr_bits.attr.mode = S_IRUGO;
cip->attr_bits.show = fp->show_bits;
if (pvr2_ctrl_is_writable(cptr)) {
cip->attr_val.attr.mode |= S_IWUSR|S_IWGRP;
cip->attr_custom.attr.mode |= S_IWUSR|S_IWGRP;
}
acnt = 0;
cip->attr_gen[acnt++] = &cip->attr_name.attr;
cip->attr_gen[acnt++] = &cip->attr_type.attr;
cip->attr_gen[acnt++] = &cip->attr_val.attr;
cip->attr_val.show = fp->show_val_norm;
cip->attr_val.store = fp->store_val_norm;
if (pvr2_ctrl_has_custom_symbols(cptr)) {
cip->attr_gen[acnt++] = &cip->attr_custom.attr;
cip->attr_custom.show = fp->show_val_custom;
cip->attr_custom.store = fp->store_val_custom;
}
switch (pvr2_ctrl_get_type(cptr)) {
case pvr2_ctl_enum:
// Control is an enumeration
cip->attr_gen[acnt++] = &cip->attr_enum.attr;
break;
case pvr2_ctl_int:
// Control is an integer
cip->attr_gen[acnt++] = &cip->attr_min.attr;
cip->attr_gen[acnt++] = &cip->attr_max.attr;
break;
case pvr2_ctl_bitmask:
// Control is an bitmask
cip->attr_gen[acnt++] = &cip->attr_bits.attr;
break;
default: break;
}
cnt = scnprintf(cip->name,sizeof(cip->name)-1,"ctl_%s",
pvr2_ctrl_get_name(cptr));
cip->name[cnt] = 0;
cip->grp.name = cip->name;
cip->grp.attrs = cip->attr_gen;
ret = sysfs_create_group(&sfp->class_dev->kobj,&cip->grp);
if (ret) {
printk(KERN_WARNING "%s: sysfs_create_group error: %d\n",
__FUNCTION__, ret);
return;
}
cip->created_ok = !0;
}
#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
static ssize_t debuginfo_show(struct class_device *,char *);
static ssize_t debugcmd_show(struct class_device *,char *);
static ssize_t debugcmd_store(struct class_device *,const char *,size_t count);
static void pvr2_sysfs_add_debugifc(struct pvr2_sysfs *sfp)
{
struct pvr2_sysfs_debugifc *dip;
int ret;
dip = kzalloc(sizeof(*dip),GFP_KERNEL);
if (!dip) return;
dip->attr_debugcmd.attr.name = "debugcmd";
dip->attr_debugcmd.attr.mode = S_IRUGO|S_IWUSR|S_IWGRP;
dip->attr_debugcmd.show = debugcmd_show;
dip->attr_debugcmd.store = debugcmd_store;
dip->attr_debuginfo.attr.name = "debuginfo";
dip->attr_debuginfo.attr.mode = S_IRUGO;
dip->attr_debuginfo.show = debuginfo_show;
sfp->debugifc = dip;
ret = class_device_create_file(sfp->class_dev,&dip->attr_debugcmd);
if (ret < 0) {
printk(KERN_WARNING "%s: class_device_create_file error: %d\n",
__FUNCTION__, ret);
} else {
dip->debugcmd_created_ok = !0;
}
ret = class_device_create_file(sfp->class_dev,&dip->attr_debuginfo);
if (ret < 0) {
printk(KERN_WARNING "%s: class_device_create_file error: %d\n",
__FUNCTION__, ret);
} else {
dip->debuginfo_created_ok = !0;
}
}
static void pvr2_sysfs_tear_down_debugifc(struct pvr2_sysfs *sfp)
{
if (!sfp->debugifc) return;
if (sfp->debugifc->debuginfo_created_ok) {
class_device_remove_file(sfp->class_dev,
&sfp->debugifc->attr_debuginfo);
}
if (sfp->debugifc->debugcmd_created_ok) {
class_device_remove_file(sfp->class_dev,
&sfp->debugifc->attr_debugcmd);
}
kfree(sfp->debugifc);
sfp->debugifc = NULL;
}
#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
static void pvr2_sysfs_add_controls(struct pvr2_sysfs *sfp)
{
unsigned int idx,cnt;
cnt = pvr2_hdw_get_ctrl_count(sfp->channel.hdw);
for (idx = 0; idx < cnt; idx++) {
pvr2_sysfs_add_control(sfp,idx);
}
}
static void pvr2_sysfs_tear_down_controls(struct pvr2_sysfs *sfp)
{
struct pvr2_sysfs_ctl_item *cip1,*cip2;
for (cip1 = sfp->item_first; cip1; cip1 = cip2) {
cip2 = cip1->item_next;
if (cip1->created_ok) {
sysfs_remove_group(&sfp->class_dev->kobj,&cip1->grp);
}
pvr2_sysfs_trace("Destroying pvr2_sysfs_ctl_item id=%p",cip1);
kfree(cip1);
}
}
static void pvr2_sysfs_class_release(struct class *class)
{
struct pvr2_sysfs_class *clp;
clp = container_of(class,struct pvr2_sysfs_class,class);
pvr2_sysfs_trace("Destroying pvr2_sysfs_class id=%p",clp);
kfree(clp);
}
static void pvr2_sysfs_release(struct class_device *class_dev)
{
pvr2_sysfs_trace("Releasing class_dev id=%p",class_dev);
kfree(class_dev);
}
static void class_dev_destroy(struct pvr2_sysfs *sfp)
{
if (!sfp->class_dev) return;
#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
pvr2_sysfs_tear_down_debugifc(sfp);
#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
pvr2_sysfs_tear_down_controls(sfp);
if (sfp->bus_info_created_ok) {
class_device_remove_file(sfp->class_dev,
&sfp->attr_bus_info);
}
if (sfp->v4l_minor_number_created_ok) {
class_device_remove_file(sfp->class_dev,
&sfp->attr_v4l_minor_number);
}
if (sfp->v4l_radio_minor_number_created_ok) {
class_device_remove_file(sfp->class_dev,
&sfp->attr_v4l_radio_minor_number);
}
if (sfp->unit_number_created_ok) {
class_device_remove_file(sfp->class_dev,
&sfp->attr_unit_number);
}
pvr2_sysfs_trace("Destroying class_dev id=%p",sfp->class_dev);
sfp->class_dev->class_data = NULL;
class_device_unregister(sfp->class_dev);
sfp->class_dev = NULL;
}
static ssize_t v4l_minor_number_show(struct class_device *class_dev,char *buf)
{
struct pvr2_sysfs *sfp;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
return scnprintf(buf,PAGE_SIZE,"%d\n",
pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw,
pvr2_v4l_type_video));
}
static ssize_t bus_info_show(struct class_device *class_dev,char *buf)
{
struct pvr2_sysfs *sfp;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
return scnprintf(buf,PAGE_SIZE,"%s\n",
pvr2_hdw_get_bus_info(sfp->channel.hdw));
}
static ssize_t v4l_radio_minor_number_show(struct class_device *class_dev,
char *buf)
{
struct pvr2_sysfs *sfp;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
return scnprintf(buf,PAGE_SIZE,"%d\n",
pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw,
pvr2_v4l_type_radio));
}
static ssize_t unit_number_show(struct class_device *class_dev,char *buf)
{
struct pvr2_sysfs *sfp;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
return scnprintf(buf,PAGE_SIZE,"%d\n",
pvr2_hdw_get_unit_number(sfp->channel.hdw));
}
static void class_dev_create(struct pvr2_sysfs *sfp,
struct pvr2_sysfs_class *class_ptr)
{
struct usb_device *usb_dev;
struct class_device *class_dev;
int ret;
usb_dev = pvr2_hdw_get_dev(sfp->channel.hdw);
if (!usb_dev) return;
class_dev = kzalloc(sizeof(*class_dev),GFP_KERNEL);
if (!class_dev) return;
pvr2_sysfs_trace("Creating class_dev id=%p",class_dev);
class_dev->class = &class_ptr->class;
if (pvr2_hdw_get_sn(sfp->channel.hdw)) {
snprintf(class_dev->class_id,BUS_ID_SIZE,"sn-%lu",
pvr2_hdw_get_sn(sfp->channel.hdw));
} else if (pvr2_hdw_get_unit_number(sfp->channel.hdw) >= 0) {
snprintf(class_dev->class_id,BUS_ID_SIZE,"unit-%c",
pvr2_hdw_get_unit_number(sfp->channel.hdw) + 'a');
} else {
kfree(class_dev);
return;
}
class_dev->dev = &usb_dev->dev;
sfp->class_dev = class_dev;
class_dev->class_data = sfp;
ret = class_device_register(class_dev);
if (ret) {
printk(KERN_ERR "%s: class_device_register failed\n",
__FUNCTION__);
kfree(class_dev);
return;
}
sfp->attr_v4l_minor_number.attr.name = "v4l_minor_number";
sfp->attr_v4l_minor_number.attr.mode = S_IRUGO;
sfp->attr_v4l_minor_number.show = v4l_minor_number_show;
sfp->attr_v4l_minor_number.store = NULL;
ret = class_device_create_file(sfp->class_dev,
&sfp->attr_v4l_minor_number);
if (ret < 0) {
printk(KERN_WARNING "%s: class_device_create_file error: %d\n",
__FUNCTION__, ret);
} else {
sfp->v4l_minor_number_created_ok = !0;
}
sfp->attr_v4l_radio_minor_number.attr.name = "v4l_radio_minor_number";
sfp->attr_v4l_radio_minor_number.attr.mode = S_IRUGO;
sfp->attr_v4l_radio_minor_number.show = v4l_radio_minor_number_show;
sfp->attr_v4l_radio_minor_number.store = NULL;
ret = class_device_create_file(sfp->class_dev,
&sfp->attr_v4l_radio_minor_number);
if (ret < 0) {
printk(KERN_WARNING "%s: class_device_create_file error: %d\n",
__FUNCTION__, ret);
} else {
sfp->v4l_radio_minor_number_created_ok = !0;
}
sfp->attr_unit_number.attr.name = "unit_number";
sfp->attr_unit_number.attr.mode = S_IRUGO;
sfp->attr_unit_number.show = unit_number_show;
sfp->attr_unit_number.store = NULL;
ret = class_device_create_file(sfp->class_dev,&sfp->attr_unit_number);
if (ret < 0) {
printk(KERN_WARNING "%s: class_device_create_file error: %d\n",
__FUNCTION__, ret);
} else {
sfp->unit_number_created_ok = !0;
}
sfp->attr_bus_info.attr.name = "bus_info_str";
sfp->attr_bus_info.attr.mode = S_IRUGO;
sfp->attr_bus_info.show = bus_info_show;
sfp->attr_bus_info.store = NULL;
ret = class_device_create_file(sfp->class_dev,
&sfp->attr_bus_info);
if (ret < 0) {
printk(KERN_WARNING "%s: class_device_create_file error: %d\n",
__FUNCTION__, ret);
} else {
sfp->bus_info_created_ok = !0;
}
pvr2_sysfs_add_controls(sfp);
#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
pvr2_sysfs_add_debugifc(sfp);
#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
}
static void pvr2_sysfs_internal_check(struct pvr2_channel *chp)
{
struct pvr2_sysfs *sfp;
sfp = container_of(chp,struct pvr2_sysfs,channel);
if (!sfp->channel.mc_head->disconnect_flag) return;
pvr2_trace(PVR2_TRACE_STRUCT,"Destroying pvr2_sysfs id=%p",sfp);
class_dev_destroy(sfp);
pvr2_channel_done(&sfp->channel);
kfree(sfp);
}
struct pvr2_sysfs *pvr2_sysfs_create(struct pvr2_context *mp,
struct pvr2_sysfs_class *class_ptr)
{
struct pvr2_sysfs *sfp;
sfp = kzalloc(sizeof(*sfp),GFP_KERNEL);
if (!sfp) return sfp;
pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr2_sysfs id=%p",sfp);
pvr2_channel_init(&sfp->channel,mp);
sfp->channel.check_func = pvr2_sysfs_internal_check;
class_dev_create(sfp,class_ptr);
return sfp;
}
static int pvr2_sysfs_hotplug(struct class_device *cd,char **envp,
int numenvp,char *buf,int size)
{
/* Even though we don't do anything here, we still need this function
because sysfs will still try to call it. */
return 0;
}
struct pvr2_sysfs_class *pvr2_sysfs_class_create(void)
{
struct pvr2_sysfs_class *clp;
clp = kzalloc(sizeof(*clp),GFP_KERNEL);
if (!clp) return clp;
pvr2_sysfs_trace("Creating pvr2_sysfs_class id=%p",clp);
clp->class.name = "pvrusb2";
clp->class.class_release = pvr2_sysfs_class_release;
clp->class.release = pvr2_sysfs_release;
clp->class.uevent = pvr2_sysfs_hotplug;
if (class_register(&clp->class)) {
pvr2_sysfs_trace(
"Registration failed for pvr2_sysfs_class id=%p",clp);
kfree(clp);
clp = NULL;
}
return clp;
}
void pvr2_sysfs_class_destroy(struct pvr2_sysfs_class *clp)
{
class_unregister(&clp->class);
}
#ifdef CONFIG_VIDEO_PVRUSB2_DEBUGIFC
static ssize_t debuginfo_show(struct class_device *class_dev,char *buf)
{
struct pvr2_sysfs *sfp;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
pvr2_hdw_trigger_module_log(sfp->channel.hdw);
return pvr2_debugifc_print_info(sfp->channel.hdw,buf,PAGE_SIZE);
}
static ssize_t debugcmd_show(struct class_device *class_dev,char *buf)
{
struct pvr2_sysfs *sfp;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
return pvr2_debugifc_print_status(sfp->channel.hdw,buf,PAGE_SIZE);
}
static ssize_t debugcmd_store(struct class_device *class_dev,
const char *buf,size_t count)
{
struct pvr2_sysfs *sfp;
int ret;
sfp = (struct pvr2_sysfs *)class_dev->class_data;
if (!sfp) return -EINVAL;
ret = pvr2_debugifc_docmd(sfp->channel.hdw,buf,count);
if (ret < 0) return ret;
return count;
}
#endif /* CONFIG_VIDEO_PVRUSB2_DEBUGIFC */
/*
Stuff for Emacs to see, in order to encourage consistent editing style:
*** Local Variables: ***
*** mode: c ***
*** fill-column: 75 ***
*** tab-width: 8 ***
*** c-basic-offset: 8 ***
*** End: ***
*/
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