pvrusb2-sysfs.c

linux内核源码

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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 device *, struct device_attribute *,
			      char *);
static ssize_t debugcmd_show(struct device *, struct device_attribute *,
			     char *);
static ssize_t debugcmd_store(struct device *, struct device_attribute *,
			      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 = device_create_file(sfp->class_dev,&dip->attr_debugcmd);
	if (ret < 0) {
		printk(KERN_WARNING "%s: device_create_file error: %d\n",
		       __FUNCTION__, ret);
	} else {
		dip->debugcmd_created_ok = !0;
	}
	ret = device_create_file(sfp->class_dev,&dip->attr_debuginfo);
	if (ret < 0) {
		printk(KERN_WARNING "%s: 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) {
		device_remove_file(sfp->class_dev,
					 &sfp->debugifc->attr_debuginfo);
	}
	if (sfp->debugifc->debugcmd_created_ok) {
		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 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) {
		device_remove_file(sfp->class_dev,
					 &sfp->attr_bus_info);
	}
	if (sfp->v4l_minor_number_created_ok) {
		device_remove_file(sfp->class_dev,
					 &sfp->attr_v4l_minor_number);
	}
	if (sfp->v4l_radio_minor_number_created_ok) {
		device_remove_file(sfp->class_dev,
					 &sfp->attr_v4l_radio_minor_number);
	}
	if (sfp->unit_number_created_ok) {
		device_remove_file(sfp->class_dev,
					 &sfp->attr_unit_number);
	}
	pvr2_sysfs_trace("Destroying class_dev id=%p",sfp->class_dev);
	sfp->class_dev->driver_data = NULL;
	device_unregister(sfp->class_dev);
	sfp->class_dev = NULL;
}


static ssize_t v4l_minor_number_show(struct device *class_dev,
				     struct device_attribute *attr, char *buf)
{
	struct pvr2_sysfs *sfp;
	sfp = (struct pvr2_sysfs *)class_dev->driver_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 device *class_dev,
			     struct device_attribute *attr, char *buf)
{
	struct pvr2_sysfs *sfp;
	sfp = (struct pvr2_sysfs *)class_dev->driver_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 device *class_dev,
					   struct device_attribute *attr,
					   char *buf)
{
	struct pvr2_sysfs *sfp;
	sfp = (struct pvr2_sysfs *)class_dev->driver_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 device *class_dev,
				struct device_attribute *attr, char *buf)
{
	struct pvr2_sysfs *sfp;
	sfp = (struct pvr2_sysfs *)class_dev->driver_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 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->bus_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->bus_id, BUS_ID_SIZE, "unit-%c",
			 pvr2_hdw_get_unit_number(sfp->channel.hdw) + 'a');
	} else {
		kfree(class_dev);
		return;
	}

	class_dev->parent = &usb_dev->dev;

	sfp->class_dev = class_dev;
	class_dev->driver_data = sfp;
	ret = device_register(class_dev);
	if (ret) {
		printk(KERN_ERR "%s: 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 = device_create_file(sfp->class_dev,
				       &sfp->attr_v4l_minor_number);
	if (ret < 0) {
		printk(KERN_WARNING "%s: 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 = device_create_file(sfp->class_dev,
				       &sfp->attr_v4l_radio_minor_number);
	if (ret < 0) {
		printk(KERN_WARNING "%s: 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 = device_create_file(sfp->class_dev,&sfp->attr_unit_number);
	if (ret < 0) {
		printk(KERN_WARNING "%s: 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 = device_create_file(sfp->class_dev,
				       &sfp->attr_bus_info);
	if (ret < 0) {
		printk(KERN_WARNING "%s: 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;
}



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.dev_release = pvr2_sysfs_release;
	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 device *class_dev,
			      struct device_attribute *attr, char *buf)
{
	struct pvr2_sysfs *sfp;
	sfp = (struct pvr2_sysfs *)class_dev->driver_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 device *class_dev,
			     struct device_attribute *attr, char *buf)
{
	struct pvr2_sysfs *sfp;
	sfp = (struct pvr2_sysfs *)class_dev->driver_data;
	if (!sfp) return -EINVAL;
	return pvr2_debugifc_print_status(sfp->channel.hdw,buf,PAGE_SIZE);
}


static ssize_t debugcmd_store(struct device *class_dev,
			      struct device_attribute *attr,
			      const char *buf, size_t count)
{
	struct pvr2_sysfs *sfp;
	int ret;

	sfp = (struct pvr2_sysfs *)class_dev->driver_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 */


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