180 lines
3.5 KiB
C
180 lines
3.5 KiB
C
#include <common.h>
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#include <fb.h>
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#include <errno.h>
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#include <command.h>
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#include <getopt.h>
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#include <fcntl.h>
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#include <fs.h>
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#include <init.h>
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static int fb_ioctl(struct cdev* cdev, int req, void *data)
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{
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struct fb_info *info = cdev->priv;
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switch (req) {
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case FBIOGET_SCREENINFO:
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memcpy(data, info, sizeof(*info));
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break;
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case FBIO_ENABLE:
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info->fbops->fb_enable(info);
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break;
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case FBIO_DISABLE:
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info->fbops->fb_disable(info);
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break;
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default:
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return -ENOSYS;
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}
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return 0;
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}
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static int fb_enable_set(struct device_d *dev, struct param_d *param,
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const char *val)
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{
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struct fb_info *info = dev->priv;
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int enable;
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char *new;
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if (!val)
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return dev_param_set_generic(dev, param, NULL);
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enable = simple_strtoul(val, NULL, 0);
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if (enable) {
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if (!info->enabled)
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info->fbops->fb_enable(info);
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new = "1";
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} else {
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if (info->enabled)
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info->fbops->fb_disable(info);
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new = "0";
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}
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dev_param_set_generic(dev, param, new);
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info->enabled = !!enable;
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return 0;
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}
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static int fb_setup_mode(struct device_d *dev, struct param_d *param,
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const char *val)
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{
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struct fb_info *info = dev->priv;
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int mode, ret;
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if (info->enabled != 0)
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return -EPERM;
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if (!val)
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return dev_param_set_generic(dev, param, NULL);
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for (mode = 0; mode < info->num_modes; mode++) {
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if (!strcmp(info->mode_list[mode].name, val))
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break;
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}
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if (mode >= info->num_modes)
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return -EINVAL;
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info->mode = &info->mode_list[mode];
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info->xres = info->mode->xres;
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info->yres = info->mode->yres;
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ret = info->fbops->fb_activate_var(info);
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if (!ret) {
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dev->resource[0].start = (resource_size_t)info->screen_base;
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info->cdev.size = info->xres * info->yres * (info->bits_per_pixel >> 3);
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dev->resource[0].end = info->cdev.size - 1;
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dev_param_set_generic(dev, param, val);
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} else
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info->cdev.size = 0;
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return ret;
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}
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static struct file_operations fb_ops = {
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.read = mem_read,
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.write = mem_write,
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.memmap = generic_memmap_rw,
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.lseek = dev_lseek_default,
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.ioctl = fb_ioctl,
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};
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int register_framebuffer(struct fb_info *info)
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{
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int id = get_free_deviceid("fb");
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struct device_d *dev;
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dev = &info->dev;
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info->cdev.ops = &fb_ops;
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info->cdev.name = asprintf("fb%d", id);
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info->cdev.size = info->xres * info->yres * (info->bits_per_pixel >> 3);
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info->cdev.dev = dev;
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info->cdev.priv = info;
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dev->resource = xzalloc(sizeof(struct resource));
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dev->resource[0].start = (resource_size_t)info->screen_base;
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dev->resource[0].end = info->cdev.size - 1;
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dev->resource[0].flags = IORESOURCE_MEM;
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dev->num_resources = 1;
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dev->priv = info;
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dev->id = id;
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sprintf(dev->name, "fb");
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register_device(&info->dev);
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dev_add_param(dev, "enable", fb_enable_set, NULL, 0);
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dev_set_param(dev, "enable", "0");
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if (info->num_modes && (info->mode_list != NULL) &&
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(info->fbops->fb_activate_var != NULL)) {
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dev_add_param(dev, "mode_name", fb_setup_mode, NULL, 0);
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dev_set_param(dev, "mode_name", info->mode_list[0].name);
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}
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devfs_create(&info->cdev);
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return 0;
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}
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static void fb_info(struct device_d *dev)
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{
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struct fb_info *info = dev->priv;
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int i;
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if (!info->num_modes)
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return;
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printf("available modes:\n");
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for (i = 0; i < info->num_modes; i++) {
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struct fb_videomode *mode = &info->mode_list[i];
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printf("%-10s %dx%d@%d\n", mode->name,
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mode->xres, mode->yres, mode->refresh);
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}
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printf("\n");
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}
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static int fb_probe(struct device_d *hw_dev)
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{
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return 0;
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}
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static struct driver_d fb_driver = {
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.name = "fb",
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.probe = fb_probe,
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.info = fb_info,
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};
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static int fb_init_driver(void)
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{
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register_driver(&fb_driver);
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return 0;
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}
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device_initcall(fb_init_driver);
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