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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/sh/boards/mach-landisk/gio.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sh/boards/mach-landisk/gio.c')
-rw-r--r--arch/sh/boards/mach-landisk/gio.c164
1 files changed, 164 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-landisk/gio.c b/arch/sh/boards/mach-landisk/gio.c
new file mode 100644
index 0000000000..ff2200fec2
--- /dev/null
+++ b/arch/sh/boards/mach-landisk/gio.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/sh/boards/landisk/gio.c - driver for landisk
+ *
+ * This driver will also support the I-O DATA Device, Inc. LANDISK Board.
+ * LANDISK and USL-5P Button, LED and GIO driver drive function.
+ *
+ * Copylight (C) 2006 kogiidena
+ * Copylight (C) 2002 Atom Create Engineering Co., Ltd. *
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kdev_t.h>
+#include <linux/cdev.h>
+#include <linux/fs.h>
+#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <mach-landisk/mach/gio.h>
+#include <mach-landisk/mach/iodata_landisk.h>
+
+#define DEVCOUNT 4
+#define GIO_MINOR 2 /* GIO minor no. */
+
+static dev_t dev;
+static struct cdev *cdev_p;
+static int openCnt;
+
+static int gio_open(struct inode *inode, struct file *filp)
+{
+ int minor = iminor(inode);
+ int ret = -ENOENT;
+
+ preempt_disable();
+ if (minor < DEVCOUNT) {
+ if (openCnt > 0) {
+ ret = -EALREADY;
+ } else {
+ openCnt++;
+ ret = 0;
+ }
+ }
+ preempt_enable();
+ return ret;
+}
+
+static int gio_close(struct inode *inode, struct file *filp)
+{
+ int minor = iminor(inode);
+
+ if (minor < DEVCOUNT) {
+ openCnt--;
+ }
+ return 0;
+}
+
+static long gio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ unsigned int data;
+ static unsigned int addr = 0;
+
+ if (cmd & 0x01) { /* write */
+ if (copy_from_user(&data, (int *)arg, sizeof(int))) {
+ return -EFAULT;
+ }
+ }
+
+ switch (cmd) {
+ case GIODRV_IOCSGIOSETADDR: /* address set */
+ addr = data;
+ break;
+
+ case GIODRV_IOCSGIODATA1: /* write byte */
+ __raw_writeb((unsigned char)(0x0ff & data), addr);
+ break;
+
+ case GIODRV_IOCSGIODATA2: /* write word */
+ if (addr & 0x01) {
+ return -EFAULT;
+ }
+ __raw_writew((unsigned short int)(0x0ffff & data), addr);
+ break;
+
+ case GIODRV_IOCSGIODATA4: /* write long */
+ if (addr & 0x03) {
+ return -EFAULT;
+ }
+ __raw_writel(data, addr);
+ break;
+
+ case GIODRV_IOCGGIODATA1: /* read byte */
+ data = __raw_readb(addr);
+ break;
+
+ case GIODRV_IOCGGIODATA2: /* read word */
+ if (addr & 0x01) {
+ return -EFAULT;
+ }
+ data = __raw_readw(addr);
+ break;
+
+ case GIODRV_IOCGGIODATA4: /* read long */
+ if (addr & 0x03) {
+ return -EFAULT;
+ }
+ data = __raw_readl(addr);
+ break;
+ default:
+ return -EFAULT;
+ break;
+ }
+
+ if ((cmd & 0x01) == 0) { /* read */
+ if (copy_to_user((int *)arg, &data, sizeof(int))) {
+ return -EFAULT;
+ }
+ }
+ return 0;
+}
+
+static const struct file_operations gio_fops = {
+ .owner = THIS_MODULE,
+ .open = gio_open, /* open */
+ .release = gio_close, /* release */
+ .unlocked_ioctl = gio_ioctl,
+ .llseek = noop_llseek,
+};
+
+static int __init gio_init(void)
+{
+ int error;
+
+ printk(KERN_INFO "gio: driver initialized\n");
+
+ openCnt = 0;
+
+ if ((error = alloc_chrdev_region(&dev, 0, DEVCOUNT, "gio")) < 0) {
+ printk(KERN_ERR
+ "gio: Couldn't alloc_chrdev_region, error=%d\n",
+ error);
+ return 1;
+ }
+
+ cdev_p = cdev_alloc();
+ cdev_p->ops = &gio_fops;
+ error = cdev_add(cdev_p, dev, DEVCOUNT);
+ if (error) {
+ printk(KERN_ERR
+ "gio: Couldn't cdev_add, error=%d\n", error);
+ return 1;
+ }
+
+ return 0;
+}
+
+static void __exit gio_exit(void)
+{
+ cdev_del(cdev_p);
+ unregister_chrdev_region(dev, DEVCOUNT);
+}
+
+module_init(gio_init);
+module_exit(gio_exit);
+
+MODULE_LICENSE("GPL");