101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
/*********************************************
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* Benjamin Krill <ben@codiert.org>
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*********************************************/
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/version.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/pagemap.h>
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#include "fpgafs.h"
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static unsigned int stat;
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static int do_cmd(u32 cmd, u32 data)
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{
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switch(cmd) {
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case BLA:
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stat = data;
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break;
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default:
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return -EFAULT;
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}
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return 0;
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}
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/* generic open function for all pipe-like files */
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static int fpgafs_open(struct inode *inode, struct file *file)
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{
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struct fpgafs_inode_info *i = FPGAFS_I(inode);
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file->private_data = i->i_ctx;
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return nonseekable_open(inode, file);
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}
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static ssize_t fpgafs_stat_read(struct file *file, char __user *buf,
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size_t len, loff_t *pos)
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{
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//struct fpga_context *ctx = file->private_data;
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u32 data;
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data=stat;
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if (copy_to_user(buf, &data, sizeof(data)))
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return -EFAULT;
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return 4;
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}
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static const struct file_operations fpgafs_stat_fops = {
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.open = fpgafs_open,
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.read = fpgafs_stat_read,
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};
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static ssize_t fpgafs_cmd_write(struct file *file, const char __user *buf,
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size_t len, loff_t *pos)
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{
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u32 data, __user *udata;
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if (len < 4)
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return -EINVAL;
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udata = (void __user *)buf;
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if (!access_ok(VERIFY_READ, buf, len))
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return -EFAULT;
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if (__get_user(data, udata))
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return -EFAULT;
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do_cmd(BLA,data);
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return 4;
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}
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static const struct file_operations fpgafs_cmd_fops = {
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.open = fpgafs_open,
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.write = fpgafs_cmd_write,
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};
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static const struct file_operations fpgafs_load_fops = {
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.open = fpgafs_open,
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.write = fpgafs_write_load,
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.read = fpgafs_read_load,
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};
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static const struct file_operations fpgafs_din_fops = {
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.open = fpgafs_open,
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.read = fpgafs_recv_data,
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};
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static const struct file_operations fpgafs_dout_fops = {
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.open = fpgafs_open,
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.write = fpgafs_send_data,
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};
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struct tree_descr fpgafs_dir_contents[] = {
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{ "din", &fpgafs_din_fops, 0222, },
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{ "dout", &fpgafs_dout_fops, 0444, },
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{ "load", &fpgafs_load_fops, 0666, },
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{ "cmd", &fpgafs_cmd_fops, 0222, },
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{ "stat", &fpgafs_stat_fops, 0444, },
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{},
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};
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