![Antonino A. Daplas](/assets/img/avatar_default.png)
Replace kmalloc with kzalloc Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
544 lines
14 KiB
C
544 lines
14 KiB
C
/*
|
|
* fbsysfs.c - framebuffer device class and attributes
|
|
*
|
|
* Copyright (c) 2004 James Simmons <jsimmons@infradead.org>
|
|
*
|
|
* 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, or (at your option) any later version.
|
|
*/
|
|
|
|
/*
|
|
* Note: currently there's only stubs for framebuffer_alloc and
|
|
* framebuffer_release here. The reson for that is that until all drivers
|
|
* are converted to use it a sysfsification will open OOPSable races.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/console.h>
|
|
|
|
/**
|
|
* framebuffer_alloc - creates a new frame buffer info structure
|
|
*
|
|
* @size: size of driver private data, can be zero
|
|
* @dev: pointer to the device for this fb, this can be NULL
|
|
*
|
|
* Creates a new frame buffer info structure. Also reserves @size bytes
|
|
* for driver private data (info->par). info->par (if any) will be
|
|
* aligned to sizeof(long).
|
|
*
|
|
* Returns the new structure, or NULL if an error occured.
|
|
*
|
|
*/
|
|
struct fb_info *framebuffer_alloc(size_t size, struct device *dev)
|
|
{
|
|
#define BYTES_PER_LONG (BITS_PER_LONG/8)
|
|
#define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
|
|
int fb_info_size = sizeof(struct fb_info);
|
|
struct fb_info *info;
|
|
char *p;
|
|
|
|
if (size)
|
|
fb_info_size += PADDING;
|
|
|
|
p = kzalloc(fb_info_size + size, GFP_KERNEL);
|
|
|
|
if (!p)
|
|
return NULL;
|
|
|
|
info = (struct fb_info *) p;
|
|
|
|
if (size)
|
|
info->par = p + fb_info_size;
|
|
|
|
info->device = dev;
|
|
|
|
return info;
|
|
#undef PADDING
|
|
#undef BYTES_PER_LONG
|
|
}
|
|
EXPORT_SYMBOL(framebuffer_alloc);
|
|
|
|
/**
|
|
* framebuffer_release - marks the structure available for freeing
|
|
*
|
|
* @info: frame buffer info structure
|
|
*
|
|
* Drop the reference count of the class_device embedded in the
|
|
* framebuffer info structure.
|
|
*
|
|
*/
|
|
void framebuffer_release(struct fb_info *info)
|
|
{
|
|
kfree(info);
|
|
}
|
|
EXPORT_SYMBOL(framebuffer_release);
|
|
|
|
static int activate(struct fb_info *fb_info, struct fb_var_screeninfo *var)
|
|
{
|
|
int err;
|
|
|
|
var->activate |= FB_ACTIVATE_FORCE;
|
|
acquire_console_sem();
|
|
fb_info->flags |= FBINFO_MISC_USEREVENT;
|
|
err = fb_set_var(fb_info, var);
|
|
fb_info->flags &= ~FBINFO_MISC_USEREVENT;
|
|
release_console_sem();
|
|
if (err)
|
|
return err;
|
|
return 0;
|
|
}
|
|
|
|
static int mode_string(char *buf, unsigned int offset,
|
|
const struct fb_videomode *mode)
|
|
{
|
|
char m = 'U';
|
|
if (mode->flag & FB_MODE_IS_DETAILED)
|
|
m = 'D';
|
|
if (mode->flag & FB_MODE_IS_VESA)
|
|
m = 'V';
|
|
if (mode->flag & FB_MODE_IS_STANDARD)
|
|
m = 'S';
|
|
return snprintf(&buf[offset], PAGE_SIZE - offset, "%c:%dx%d-%d\n", m, mode->xres, mode->yres, mode->refresh);
|
|
}
|
|
|
|
static ssize_t store_mode(struct class_device *class_device, const char * buf,
|
|
size_t count)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
char mstr[100];
|
|
struct fb_var_screeninfo var;
|
|
struct fb_modelist *modelist;
|
|
struct fb_videomode *mode;
|
|
struct list_head *pos;
|
|
size_t i;
|
|
int err;
|
|
|
|
memset(&var, 0, sizeof(var));
|
|
|
|
list_for_each(pos, &fb_info->modelist) {
|
|
modelist = list_entry(pos, struct fb_modelist, list);
|
|
mode = &modelist->mode;
|
|
i = mode_string(mstr, 0, mode);
|
|
if (strncmp(mstr, buf, max(count, i)) == 0) {
|
|
|
|
var = fb_info->var;
|
|
fb_videomode_to_var(&var, mode);
|
|
if ((err = activate(fb_info, &var)))
|
|
return err;
|
|
fb_info->mode = mode;
|
|
return count;
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static ssize_t show_mode(struct class_device *class_device, char *buf)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
|
|
if (!fb_info->mode)
|
|
return 0;
|
|
|
|
return mode_string(buf, 0, fb_info->mode);
|
|
}
|
|
|
|
static ssize_t store_modes(struct class_device *class_device, const char * buf,
|
|
size_t count)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
LIST_HEAD(old_list);
|
|
int i = count / sizeof(struct fb_videomode);
|
|
|
|
if (i * sizeof(struct fb_videomode) != count)
|
|
return -EINVAL;
|
|
|
|
acquire_console_sem();
|
|
list_splice(&fb_info->modelist, &old_list);
|
|
fb_videomode_to_modelist((struct fb_videomode *)buf, i,
|
|
&fb_info->modelist);
|
|
if (fb_new_modelist(fb_info)) {
|
|
fb_destroy_modelist(&fb_info->modelist);
|
|
list_splice(&old_list, &fb_info->modelist);
|
|
} else
|
|
fb_destroy_modelist(&old_list);
|
|
|
|
release_console_sem();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t show_modes(struct class_device *class_device, char *buf)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
unsigned int i;
|
|
struct list_head *pos;
|
|
struct fb_modelist *modelist;
|
|
const struct fb_videomode *mode;
|
|
|
|
i = 0;
|
|
list_for_each(pos, &fb_info->modelist) {
|
|
modelist = list_entry(pos, struct fb_modelist, list);
|
|
mode = &modelist->mode;
|
|
i += mode_string(buf, i, mode);
|
|
}
|
|
return i;
|
|
}
|
|
|
|
static ssize_t store_bpp(struct class_device *class_device, const char * buf,
|
|
size_t count)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
struct fb_var_screeninfo var;
|
|
char ** last = NULL;
|
|
int err;
|
|
|
|
var = fb_info->var;
|
|
var.bits_per_pixel = simple_strtoul(buf, last, 0);
|
|
if ((err = activate(fb_info, &var)))
|
|
return err;
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_bpp(struct class_device *class_device, char *buf)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.bits_per_pixel);
|
|
}
|
|
|
|
static ssize_t store_rotate(struct class_device *class_device, const char *buf,
|
|
size_t count)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
struct fb_var_screeninfo var;
|
|
char **last = NULL;
|
|
int err;
|
|
|
|
var = fb_info->var;
|
|
var.rotate = simple_strtoul(buf, last, 0);
|
|
|
|
if ((err = activate(fb_info, &var)))
|
|
return err;
|
|
|
|
return count;
|
|
}
|
|
|
|
|
|
static ssize_t show_rotate(struct class_device *class_device, char *buf)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->var.rotate);
|
|
}
|
|
|
|
static ssize_t store_con_rotate(struct class_device *class_device,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
int rotate;
|
|
char **last = NULL;
|
|
|
|
acquire_console_sem();
|
|
rotate = simple_strtoul(buf, last, 0);
|
|
fb_con_duit(fb_info, FB_EVENT_SET_CON_ROTATE, &rotate);
|
|
release_console_sem();
|
|
return count;
|
|
}
|
|
|
|
static ssize_t store_con_rotate_all(struct class_device *class_device,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
int rotate;
|
|
char **last = NULL;
|
|
|
|
acquire_console_sem();
|
|
rotate = simple_strtoul(buf, last, 0);
|
|
fb_con_duit(fb_info, FB_EVENT_SET_CON_ROTATE_ALL, &rotate);
|
|
release_console_sem();
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_con_rotate(struct class_device *class_device, char *buf)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
int rotate;
|
|
|
|
acquire_console_sem();
|
|
rotate = fb_con_duit(fb_info, FB_EVENT_GET_CON_ROTATE, NULL);
|
|
release_console_sem();
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
|
|
}
|
|
|
|
static ssize_t store_virtual(struct class_device *class_device,
|
|
const char * buf, size_t count)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
struct fb_var_screeninfo var;
|
|
char *last = NULL;
|
|
int err;
|
|
|
|
var = fb_info->var;
|
|
var.xres_virtual = simple_strtoul(buf, &last, 0);
|
|
last++;
|
|
if (last - buf >= count)
|
|
return -EINVAL;
|
|
var.yres_virtual = simple_strtoul(last, &last, 0);
|
|
|
|
if ((err = activate(fb_info, &var)))
|
|
return err;
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_virtual(struct class_device *class_device, char *buf)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xres_virtual,
|
|
fb_info->var.yres_virtual);
|
|
}
|
|
|
|
static ssize_t show_stride(struct class_device *class_device, char *buf)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->fix.line_length);
|
|
}
|
|
|
|
/* Format for cmap is "%02x%c%4x%4x%4x\n" */
|
|
/* %02x entry %c transp %4x red %4x blue %4x green \n */
|
|
/* 256 rows at 16 chars equals 4096, the normal page size */
|
|
/* the code will automatically adjust for different page sizes */
|
|
static ssize_t store_cmap(struct class_device *class_device, const char *buf,
|
|
size_t count)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
int rc, i, start, length, transp = 0;
|
|
|
|
if ((count > PAGE_SIZE) || ((count % 16) != 0))
|
|
return -EINVAL;
|
|
|
|
if (!fb_info->fbops->fb_setcolreg && !fb_info->fbops->fb_setcmap)
|
|
return -EINVAL;
|
|
|
|
sscanf(buf, "%02x", &start);
|
|
length = count / 16;
|
|
|
|
for (i = 0; i < length; i++)
|
|
if (buf[i * 16 + 2] != ' ')
|
|
transp = 1;
|
|
|
|
/* If we can batch, do it */
|
|
if (fb_info->fbops->fb_setcmap && length > 1) {
|
|
struct fb_cmap umap;
|
|
|
|
memset(&umap, 0, sizeof(umap));
|
|
if ((rc = fb_alloc_cmap(&umap, length, transp)))
|
|
return rc;
|
|
|
|
umap.start = start;
|
|
for (i = 0; i < length; i++) {
|
|
sscanf(&buf[i * 16 + 3], "%4hx", &umap.red[i]);
|
|
sscanf(&buf[i * 16 + 7], "%4hx", &umap.blue[i]);
|
|
sscanf(&buf[i * 16 + 11], "%4hx", &umap.green[i]);
|
|
if (transp)
|
|
umap.transp[i] = (buf[i * 16 + 2] != ' ');
|
|
}
|
|
rc = fb_info->fbops->fb_setcmap(&umap, fb_info);
|
|
fb_copy_cmap(&umap, &fb_info->cmap);
|
|
fb_dealloc_cmap(&umap);
|
|
|
|
return rc;
|
|
}
|
|
for (i = 0; i < length; i++) {
|
|
u16 red, blue, green, tsp;
|
|
|
|
sscanf(&buf[i * 16 + 3], "%4hx", &red);
|
|
sscanf(&buf[i * 16 + 7], "%4hx", &blue);
|
|
sscanf(&buf[i * 16 + 11], "%4hx", &green);
|
|
tsp = (buf[i * 16 + 2] != ' ');
|
|
if ((rc = fb_info->fbops->fb_setcolreg(start++,
|
|
red, green, blue, tsp, fb_info)))
|
|
return rc;
|
|
|
|
fb_info->cmap.red[i] = red;
|
|
fb_info->cmap.blue[i] = blue;
|
|
fb_info->cmap.green[i] = green;
|
|
if (transp)
|
|
fb_info->cmap.transp[i] = tsp;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t show_cmap(struct class_device *class_device, char *buf)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
unsigned int i;
|
|
|
|
if (!fb_info->cmap.red || !fb_info->cmap.blue ||
|
|
!fb_info->cmap.green)
|
|
return -EINVAL;
|
|
|
|
if (fb_info->cmap.len > PAGE_SIZE / 16)
|
|
return -EINVAL;
|
|
|
|
/* don't mess with the format, the buffer is PAGE_SIZE */
|
|
/* 256 entries at 16 chars per line equals 4096 = PAGE_SIZE */
|
|
for (i = 0; i < fb_info->cmap.len; i++) {
|
|
snprintf(&buf[ i * 16], PAGE_SIZE - i * 16, "%02x%c%4x%4x%4x\n", i + fb_info->cmap.start,
|
|
((fb_info->cmap.transp && fb_info->cmap.transp[i]) ? '*' : ' '),
|
|
fb_info->cmap.red[i], fb_info->cmap.blue[i],
|
|
fb_info->cmap.green[i]);
|
|
}
|
|
return 16 * fb_info->cmap.len;
|
|
}
|
|
|
|
static ssize_t store_blank(struct class_device *class_device, const char * buf,
|
|
size_t count)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
char *last = NULL;
|
|
int err;
|
|
|
|
acquire_console_sem();
|
|
fb_info->flags |= FBINFO_MISC_USEREVENT;
|
|
err = fb_blank(fb_info, simple_strtoul(buf, &last, 0));
|
|
fb_info->flags &= ~FBINFO_MISC_USEREVENT;
|
|
release_console_sem();
|
|
if (err < 0)
|
|
return err;
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_blank(struct class_device *class_device, char *buf)
|
|
{
|
|
// struct fb_info *fb_info = class_get_devdata(class_device);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t store_console(struct class_device *class_device,
|
|
const char * buf, size_t count)
|
|
{
|
|
// struct fb_info *fb_info = class_get_devdata(class_device);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t show_console(struct class_device *class_device, char *buf)
|
|
{
|
|
// struct fb_info *fb_info = class_get_devdata(class_device);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t store_cursor(struct class_device *class_device,
|
|
const char * buf, size_t count)
|
|
{
|
|
// struct fb_info *fb_info = class_get_devdata(class_device);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t show_cursor(struct class_device *class_device, char *buf)
|
|
{
|
|
// struct fb_info *fb_info = class_get_devdata(class_device);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t store_pan(struct class_device *class_device, const char * buf,
|
|
size_t count)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
struct fb_var_screeninfo var;
|
|
char *last = NULL;
|
|
int err;
|
|
|
|
var = fb_info->var;
|
|
var.xoffset = simple_strtoul(buf, &last, 0);
|
|
last++;
|
|
if (last - buf >= count)
|
|
return -EINVAL;
|
|
var.yoffset = simple_strtoul(last, &last, 0);
|
|
|
|
acquire_console_sem();
|
|
err = fb_pan_display(fb_info, &var);
|
|
release_console_sem();
|
|
|
|
if (err < 0)
|
|
return err;
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_pan(struct class_device *class_device, char *buf)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xoffset,
|
|
fb_info->var.xoffset);
|
|
}
|
|
|
|
static ssize_t show_name(struct class_device *class_device, char *buf)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
|
|
return snprintf(buf, PAGE_SIZE, "%s\n", fb_info->fix.id);
|
|
}
|
|
|
|
static ssize_t store_fbstate(struct class_device *class_device,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
u32 state;
|
|
char *last = NULL;
|
|
|
|
state = simple_strtoul(buf, &last, 0);
|
|
|
|
acquire_console_sem();
|
|
fb_set_suspend(fb_info, (int)state);
|
|
release_console_sem();
|
|
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_fbstate(struct class_device *class_device, char *buf)
|
|
{
|
|
struct fb_info *fb_info = class_get_devdata(class_device);
|
|
return snprintf(buf, PAGE_SIZE, "%d\n", fb_info->state);
|
|
}
|
|
|
|
static struct class_device_attribute class_device_attrs[] = {
|
|
__ATTR(bits_per_pixel, S_IRUGO|S_IWUSR, show_bpp, store_bpp),
|
|
__ATTR(blank, S_IRUGO|S_IWUSR, show_blank, store_blank),
|
|
__ATTR(color_map, S_IRUGO|S_IWUSR, show_cmap, store_cmap),
|
|
__ATTR(console, S_IRUGO|S_IWUSR, show_console, store_console),
|
|
__ATTR(cursor, S_IRUGO|S_IWUSR, show_cursor, store_cursor),
|
|
__ATTR(mode, S_IRUGO|S_IWUSR, show_mode, store_mode),
|
|
__ATTR(modes, S_IRUGO|S_IWUSR, show_modes, store_modes),
|
|
__ATTR(pan, S_IRUGO|S_IWUSR, show_pan, store_pan),
|
|
__ATTR(virtual_size, S_IRUGO|S_IWUSR, show_virtual, store_virtual),
|
|
__ATTR(name, S_IRUGO, show_name, NULL),
|
|
__ATTR(stride, S_IRUGO, show_stride, NULL),
|
|
__ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
|
|
__ATTR(con_rotate, S_IRUGO|S_IWUSR, show_con_rotate, store_con_rotate),
|
|
__ATTR(con_rotate_all, S_IWUSR, NULL, store_con_rotate_all),
|
|
__ATTR(state, S_IRUGO|S_IWUSR, show_fbstate, store_fbstate),
|
|
};
|
|
|
|
int fb_init_class_device(struct fb_info *fb_info)
|
|
{
|
|
unsigned int i;
|
|
class_set_devdata(fb_info->class_device, fb_info);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
|
|
class_device_create_file(fb_info->class_device,
|
|
&class_device_attrs[i]);
|
|
return 0;
|
|
}
|
|
|
|
void fb_cleanup_class_device(struct fb_info *fb_info)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
|
|
class_device_remove_file(fb_info->class_device,
|
|
&class_device_attrs[i]);
|
|
}
|
|
|
|
|