patch-2.4.20 linux-2.4.20/drivers/gsc/eisa_eeprom.c
Next file: linux-2.4.20/drivers/gsc/eisa_enumerator.c
Previous file: linux-2.4.20/drivers/gsc/eisa.c
Back to the patch index
Back to the overall index
- Lines: 108
- Date:
Thu Nov 28 15:53:12 2002
- Orig file:
linux-2.4.19/drivers/gsc/eisa_eeprom.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -urN linux-2.4.19/drivers/gsc/eisa_eeprom.c linux-2.4.20/drivers/gsc/eisa_eeprom.c
@@ -0,0 +1,107 @@
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/slab.h>
+#include <asm/gsc.h>
+#include <asm/uaccess.h>
+#include <asm/eisa_eeprom.h>
+
+#define EISA_EEPROM_MINOR 241
+
+static unsigned long eeprom_addr;
+
+static long long eisa_eeprom_llseek(struct file *file, loff_t offset, int origin )
+{
+ switch (origin) {
+ case 0:
+ /* nothing to do */
+ break;
+ case 1:
+ offset += file->f_pos;
+ break;
+ case 2:
+ offset += HPEE_MAX_LENGTH;
+ break;
+ }
+ return (offset >= 0 && offset < HPEE_MAX_LENGTH) ? (file->f_pos = offset) : -EINVAL;
+}
+
+static ssize_t eisa_eeprom_read(struct file * file,
+ char *buf, size_t count, loff_t *ppos )
+{
+ unsigned char *tmp;
+ ssize_t ret;
+ int i;
+
+ if (*ppos >= HPEE_MAX_LENGTH)
+ return 0;
+
+ count = *ppos + count < HPEE_MAX_LENGTH ? count : HPEE_MAX_LENGTH - *ppos;
+ tmp = kmalloc(count, GFP_KERNEL);
+ if (tmp) {
+ for (i = 0; i < count; i++)
+ tmp[i] = gsc_readb(eeprom_addr+(*ppos)++);
+
+ if (copy_to_user (buf, tmp, count))
+ ret = -EFAULT;
+ else
+ ret = count;
+ kfree (tmp);
+ } else
+ ret = -ENOMEM;
+
+ return ret;
+}
+
+static int eisa_eeprom_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd,
+ unsigned long arg)
+{
+ return -ENOTTY;
+}
+
+static int eisa_eeprom_open(struct inode *inode, struct file *file)
+{
+ if (file->f_mode & 2 || eeprom_addr == 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int eisa_eeprom_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+/*
+ * The various file operations we support.
+ */
+static struct file_operations eisa_eeprom_fops = {
+ owner: THIS_MODULE,
+ llseek: eisa_eeprom_llseek,
+ read: eisa_eeprom_read,
+ ioctl: eisa_eeprom_ioctl,
+ open: eisa_eeprom_open,
+ release: eisa_eeprom_release,
+};
+
+static struct miscdevice eisa_eeprom_dev=
+{
+ EISA_EEPROM_MINOR,
+ "eisa eeprom",
+ &eisa_eeprom_fops
+};
+
+int __init eisa_eeprom_init(unsigned long addr)
+{
+ if (addr) {
+ eeprom_addr = addr;
+ misc_register(&eisa_eeprom_dev);
+ printk(KERN_INFO "EISA EEPROM at 0x%lx\n", eeprom_addr);
+ }
+ return 0;
+}
+
+MODULE_LICENSE("GPL");
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)