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path: root/drivers/staging/kpc2000/kpc_i2c/fileops.c
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Diffstat (limited to 'drivers/staging/kpc2000/kpc_i2c/fileops.c')
-rw-r--r--drivers/staging/kpc2000/kpc_i2c/fileops.c181
1 files changed, 0 insertions, 181 deletions
diff --git a/drivers/staging/kpc2000/kpc_i2c/fileops.c b/drivers/staging/kpc2000/kpc_i2c/fileops.c
deleted file mode 100644
index e749c0994491..000000000000
--- a/drivers/staging/kpc2000/kpc_i2c/fileops.c
+++ /dev/null
@@ -1,181 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-#if 0
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/kernel.h> /* printk() */
-#include <linux/slab.h> /* kmalloc() */
-#include <linux/fs.h> /* everything... */
-#include <linux/errno.h> /* error codes */
-#include <linux/types.h> /* size_t */
-#include <linux/cdev.h>
-#include <asm/uaccess.h> /* copy_*_user */
-
-#include "i2c_driver.h"
-
-int i2c_cdev_open(struct inode *inode, struct file *filp)
-{
- struct i2c_device *lddev;
-
- if(NULL == inode) {
- //printk(KERN_WARNING "<pl_i2c> i2c_cdev_open: inode is a NULL pointer\n");
- DBG_PRINT(KERN_WARNING, "i2c_cdev_open: inode is a NULL pointer\n");
- return -EINVAL;
- }
- if(NULL == filp) {
- //printk(KERN_WARNING "<pl_i2c> i2c_cdev_open: filp is a NULL pointer\n");
- DBG_PRINT(KERN_WARNING, "i2c_cdev_open: filp is a NULL pointer\n");
- return -EINVAL;
- }
-
- lddev = container_of(inode->i_cdev, struct i2c_device, cdev);
- //printk(KERN_DEBUG "<pl_i2c> i2c_cdev_open(filp = [%p], lddev = [%p])\n", filp, lddev);
- DBG_PRINT(KERN_DEBUG, "i2c_cdev_open(filp = [%p], lddev = [%p])\n", filp, lddev);
-
- filp->private_data = lddev; /* so other methods can access it */
-
- return 0; /* success */
-}
-
-int i2c_cdev_close(struct inode *inode, struct file *filp)
-{
- struct i2c_device *lddev;
-
- if(NULL == inode) {
- //printk(KERN_WARNING "<pl_i2c> i2c_cdev_close: inode is a NULL pointer\n");
- DBG_PRINT(KERN_WARNING, "i2c_cdev_close: inode is a NULL pointer\n");
- return -EINVAL;
- }
- if(NULL == filp) {
- //printk(KERN_WARNING "<pl_i2c> i2c_cdev_close: filp is a NULL pointer\n");
- DBG_PRINT(KERN_WARNING, "i2c_cdev_close: filp is a NULL pointer\n");
- return -EINVAL;
- }
-
- lddev = filp->private_data;
- //printk(KERN_DEBUG "<pl_i2c> i2c_cdev_close(filp = [%p], lddev = [%p])\n", filp, lddev);
- DBG_PRINT(KERN_DEBUG, "i2c_cdev_close(filp = [%p], lddev = [%p])\n", filp, lddev);
-
- return 0;
-}
-
-ssize_t i2c_cdev_read(struct file *filp, char __user *buf, size_t count, loff_t *f_pos)
-{
- size_t copy;
- ssize_t ret = 0;
- int err = 0;
- u64 read_val;
- char tmp_buf[48] = { 0 };
- struct i2c_device *lddev = filp->private_data;
-
- if(NULL == filp) {
- //printk(KERN_WARNING "<pl_i2c> i2c_cdev_read: filp is a NULL pointer\n");
- DBG_PRINT(KERN_WARNING, "i2c_cdev_read: filp is a NULL pointer\n");
- return -EINVAL;
- }
- if(NULL == buf) {
- //printk(KERN_WARNING "<pl_i2c> i2c_cdev_read: buf is a NULL pointer\n");
- DBG_PRINT(KERN_WARNING, "i2c_cdev_read: buf is a NULL pointer\n");
- return -EINVAL;
- }
- if(NULL == f_pos) {
- //printk(KERN_WARNING "<pl_i2c> i2c_cdev_read: f_pos is a NULL pointer\n");
- DBG_PRINT(KERN_WARNING, "i2c_cdev_read: f_pos is a NULL pointer\n");
- return -EINVAL;
- }
-
- if(count < sizeof(tmp_buf)) {
- //printk(KERN_INFO "<pl_i2c> i2c_cdev_read: buffer is too small (count = %d, should be at least %d bytes)\n", (int)count, (int)sizeof(tmp_buf));
- DBG_PRINT(KERN_INFO, "i2c_cdev_read: buffer is too small (count = %d, should be at least %d bytes)\n", (int)count, (int)sizeof(tmp_buf));
- return -EINVAL;
- }
- if(((*f_pos * 8) + lddev->pldev->resource[0].start) > lddev->pldev->resource[0].end) {
- //printk(KERN_INFO "<pl_i2c> i2c_cdev_read: bad read addr %016llx\n", (*f_pos * 8) + lddev->pldev->resource[0].start);
- DBG_PRINT(KERN_INFO, "i2c_cdev_read: bad read addr %016llx\n", (*f_pos * 8) + lddev->pldev->resource[0].start);
- //printk(KERN_INFO "<pl_i2c> i2c_cdev_read: addr end %016llx\n", lddev->pldev->resource[0].end);
- DBG_PRINT(KERN_INFO, "i2c_cdev_read: addr end %016llx\n", lddev->pldev->resource[0].end);
- //printk(KERN_INFO "<pl_i2c> i2c_cdev_read: EOF reached\n");
- DBG_PRINT(KERN_INFO, "i2c_cdev_read: EOF reached\n");
- return 0;
- }
-
- down_read(&lddev->rw_sem);
-
- read_val = *(lddev->regs + *f_pos);
- copy = clamp_t(size_t, count, 1, sizeof(tmp_buf));
- copy = scnprintf(tmp_buf, copy, "reg: 0x%x val: 0x%llx\n", (unsigned int)*f_pos, read_val);
- err = copy_to_user(buf, tmp_buf, copy);
- if(err) {
- //printk(KERN_INFO "<pl_i2c> i2c_cdev_read: could not copy to user (err = %d)\n", err);
- DBG_PRINT(KERN_INFO, "i2c_cdev_read: could not copy to user (err = %d)\n", err);
- return -EINVAL;
- }
-
- ret = (ssize_t)copy;
- (*f_pos)++;
-
- up_read(&lddev->rw_sem);
-
- return ret;
-}
-
-ssize_t i2c_cdev_write(struct file *filp, const char __user *buf, size_t count, loff_t *f_pos)
-{
- u8 reg;
- u8 val;
- char tmp[8] = { 0 };
- struct i2c_device *lddev = filp->private_data;
-
- if(NULL == filp) {
- //printk(KERN_WARNING "<pl_i2c> i2c_cdev_write: filp is a NULL pointer\n");
- DBG_PRINT(KERN_WARNING, "i2c_cdev_write: filp is a NULL pointer\n");
- return -EINVAL;
- }
- if(NULL == buf) {
- //printk(KERN_WARNING "<pl_i2c> i2c_cdev_write: buf is a NULL pointer\n");
- DBG_PRINT(KERN_WARNING, "i2c_cdev_write: buf is a NULL pointer\n");
- return -EINVAL;
- }
- if(NULL == f_pos) {
- //printk(KERN_WARNING "<pl_i2c> i2c_cdev_write: f_pos is a NULL pointer\n");
- DBG_PRINT(KERN_WARNING, "i2c_cdev_write: f_pos is a NULL pointer\n");
- return -EINVAL;
- }
-
- //printk(KERN_DEBUG "<pl_i2c> i2c_cdev_write(filp = [%p], lddev = [%p])\n", filp, lddev);
- DBG_PRINT(KERN_DEBUG, "i2c_cdev_write(filp = [%p], lddev = [%p])\n", filp, lddev);
-
- down_write(&lddev->rw_sem);
-
- if(count >= 2) {
- if(copy_from_user(tmp, buf, 2)) {
- return -EFAULT;
- }
-
- reg = tmp[0] - '0';
- val = tmp[1] - '0';
-
- //printk(KERN_DEBUG " reg = %d val = %d\n", reg, val);
- DBG_PRINT(KERN_DEBUG, " reg = %d val = %d\n", reg, val);
-
- if(reg >= 0 && reg < 16) {
- //printk(KERN_DEBUG " Writing 0x%x to %p\n", val, lddev->regs + reg);
- DBG_PRINT(KERN_DEBUG, " Writing 0x%x to %p\n", val, lddev->regs + reg);
- *(lddev->regs + reg) = val;
- }
- }
-
- (*f_pos)++;
-
- up_write(&lddev->rw_sem);
-
- return count;
-}
-
-struct file_operations i2c_fops = {
- .owner = THIS_MODULE,
- .open = i2c_cdev_open,
- .release = i2c_cdev_close,
- .read = i2c_cdev_read,
- .write = i2c_cdev_write,
-};
-#endif
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