Re: [Linuxconsole-commit]CVS: ruby/ruby-2.6/drivers/char vt_sysfs.c,NONE,1.1 Makefile,1.6,1.7 vt.c,1.14,1.15

[James S. <jsi...@in...>]

Awesome work !!!!!!

On Sun, 8 Feb 2004, Aivils Stoss wrote:

> Update of /cvsroot/linuxconsole/ruby/ruby-2.6/drivers/char
> In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv413/ruby-2.6/drivers/char
> 
> Modified Files:
> 	Makefile vt.c 
> Added Files:
> 	vt_sysfs.c 
> Log Message:
> add initial read-only sysfs support
> 
> --- NEW FILE: vt_sysfs.c ---
> /*
>  * drivers/char/vt_userspace.c - basic VirtualTerminal class support
>  * A very simple (and naive) implementation by Aivils Stoss
>  */
> 
> #include <linux/device.h>
> #include <linux/module.h>
> #include <linux/init.h>
> #include <linux/list.h>
> #include <linux/vt_kern.h>
> #include <linux/input.h>
> 
> /* show configuration fields */
> #define vt_config_attr(field, format_string)				\
> static ssize_t								\
> vt_show_##field (struct device *dev, char *buf)				\
> {									\
> 	struct vt_struct *vt;						\
> 									\
> 	vt = to_vt_struct (dev);					\
> 	return sprintf (buf, format_string, vt->field);		\
> }									\
> static DEVICE_ATTR(field, S_IRUGO, vt_show_##field, NULL);
> 
> struct device vt_parent_dev;
> 
> vt_config_attr(display_desc, "%s\n");
> vt_config_attr(first_vc, "%d\n");
> vt_config_attr(vc_count, "%d\n");
> 
> 
> static ssize_t
> vt_show_keyboard (struct device *dev, char *buf)
> {
> 	struct vt_struct *vt;
> 	struct input_handle *handle;
> 
> 	vt = to_vt_struct (dev);
> 	handle = vt->keyboard;
> 	if (handle && handle->dev->phys)
> 		return sprintf (buf, "%s\n", handle->dev->phys);
> 	return sprintf (buf, "%s\n", "");
> }
> static DEVICE_ATTR(keyboard, S_IRUGO, vt_show_keyboard, NULL);
> 
> /**
>  * vt_dev_get - increments the reference count of the pci device structure
>  * @vt: the device being referenced
>  *
>  * Each live reference to a device should be refcounted.
>  *
>  * Drivers for VT devices should normally record such references in
>  * their probe() methods, when they bind to a device, and release
>  * them by calling vt_dev_put(), in their disconnect() methods.
>  *
>  * A pointer to the device with the incremented reference counter is returned.
>  */
> struct vt_struct *vt_dev_get(struct vt_struct *vt)
> {
> 	struct device *tmp;
> 
> 	if (!vt)
> 		return NULL;
> 
> 	tmp = get_device(&vt->dev);
> 	if (tmp)        
> 		return to_vt_struct(tmp);
> 	else
> 		return NULL;
> }
> 
> /**
>  * vt_dev_put - release a use of the pci device structure
>  * @vt: device that's been disconnected
>  *
>  * Must be called when a user of a device is finished with it.  When the last
>  * user of the device calls this function, the memory of the device is freed.
>  */
> void vt_dev_put(struct vt_struct *vt)
> {
> 	if (vt)
> 		put_device(&vt->dev);
> }
> 
> struct bus_type vt_bus_type = {
> 	.name		= "vt",
> };
> 
> 
> int __init vt_create_sysfs_dev_files (struct vt_struct *vt)
> {
> 	struct device *dev = &vt->dev;
> 
> 	bus_register(&vt_bus_type);
> 	dev->parent = &vt_parent_dev;
> 	dev->bus = &vt_bus_type;
> 	device_initialize(dev);
> 	dev->release = NULL; /* release_vt */
> 	vt_dev_get(vt);
> 	sprintf (dev->bus_id, "%02x", vt->vt_num);
> 	device_add(dev);
> 
> 	/* current configuration's attributes */
> 	device_create_file (dev, &dev_attr_display_desc);
> 	device_create_file (dev, &dev_attr_first_vc);
> 	device_create_file (dev, &dev_attr_vc_count);
> 	device_create_file (dev, &dev_attr_keyboard);
> 
> 	return 0;
> }
> 
> void __init vt_sysfs_init(void)
> {
> 	struct device *dev=&vt_parent_dev;
> 	struct vt_struct *vt;
> 
> 	memset(dev, 0, sizeof(*dev));
> 	dev->parent = NULL;
> 	sprintf(dev->bus_id, "wagadubu");
> 	device_register(dev);
>         list_for_each_entry (vt, &vt_list, node) {
>                 vt_create_sysfs_dev_files(vt);
>         }
> }
> 
> Index: Makefile
> ===================================================================
> RCS file: /cvsroot/linuxconsole/ruby/ruby-2.6/drivers/char/Makefile,v
> retrieving revision 1.6
> retrieving revision 1.7
> diff -u -d -r1.6 -r1.7
> --- Makefile	9 Feb 2004 07:31:07 -0000	1.6
> +++ Makefile	9 Feb 2004 07:33:28 -0000	1.7
> @@ -10,7 +10,7 @@
>  obj-y	 += mem.o random.o tty_io.o n_tty.o tty_ioctl.o pty.o misc.o
>  
>  obj-$(CONFIG_VT)		+= vt_ioctl.o decvte.o vc_screen.o consolemap.o \
> -				   consolemap_deftbl.o selection.o keyboard.o vt_proc.o
> +				   consolemap_deftbl.o selection.o keyboard.o vt_proc.o vt_sysfs.o
>  obj-$(CONFIG_HW_CONSOLE)	+= vt.o defkeymap.o
>  obj-$(CONFIG_MAGIC_SYSRQ)	+= sysrq.o
>  obj-$(CONFIG_ESPSERIAL)		+= esp.o
> 
> Index: vt.c
> ===================================================================
> RCS file: /cvsroot/linuxconsole/ruby/ruby-2.6/drivers/char/vt.c,v
> retrieving revision 1.14
> retrieving revision 1.15
> diff -u -d -r1.14 -r1.15
> --- vt.c	9 Feb 2004 07:31:07 -0000	1.14
> +++ vt.c	9 Feb 2004 07:33:28 -0000	1.15
> @@ -1851,6 +1851,7 @@
>  #ifdef CONFIG_PROC_FS
>          vt_proc_init();
>  #endif
> +	vt_sysfs_init();
>  	return 0;
>  }
>  
> 
> 
> 
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