Copyright (c) 2005 Jim Cromie <jim.cromie@gmail.com>
*/
-#include <linux/config.h>
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/nsc_gpio.h>
+#include <linux/platform_device.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#define NAME "nsc_gpio"
+void nsc_gpio_dump(struct nsc_gpio_ops *amp, unsigned index)
+{
+ /* retrieve current config w/o changing it */
+ u32 config = amp->gpio_config(index, ~0, 0);
+
+ /* user requested via 'v' command, so its INFO */
+ dev_info(amp->dev, "io%02u: 0x%04x %s %s %s %s %s %s %s\tio:%d/%d\n",
+ index, config,
+ (config & 1) ? "OE" : "TS", /* output-enabled/tristate */
+ (config & 2) ? "PP" : "OD", /* push pull / open drain */
+ (config & 4) ? "PUE" : "PUD", /* pull up enabled/disabled */
+ (config & 8) ? "LOCKED" : "", /* locked / unlocked */
+ (config & 16) ? "LEVEL" : "EDGE",/* level/edge input */
+ (config & 32) ? "HI" : "LO", /* trigger on rise/fall edge */
+ (config & 64) ? "DEBOUNCE" : "", /* debounce */
+
+ amp->gpio_get(index), amp->gpio_current(index));
+}
+
ssize_t nsc_gpio_write(struct file *file, const char __user *data,
size_t len, loff_t *ppos)
{
- unsigned m = iminor(file->f_dentry->d_inode);
+ unsigned m = iminor(file->f_path.dentry->d_inode);
struct nsc_gpio_ops *amp = file->private_data;
+ struct device *dev = amp->dev;
size_t i;
int err = 0;
amp->gpio_set(m, 1);
break;
case 'O':
- printk(KERN_INFO NAME ": GPIO%d output enabled\n", m);
+ dev_dbg(dev, "GPIO%d output enabled\n", m);
amp->gpio_config(m, ~1, 1);
break;
case 'o':
- printk(KERN_INFO NAME ": GPIO%d output disabled\n", m);
+ dev_dbg(dev, "GPIO%d output disabled\n", m);
amp->gpio_config(m, ~1, 0);
break;
case 'T':
- printk(KERN_INFO NAME ": GPIO%d output is push pull\n",
- m);
+ dev_dbg(dev, "GPIO%d output is push pull\n", m);
amp->gpio_config(m, ~2, 2);
break;
case 't':
- printk(KERN_INFO NAME ": GPIO%d output is open drain\n",
- m);
+ dev_dbg(dev, "GPIO%d output is open drain\n", m);
amp->gpio_config(m, ~2, 0);
break;
case 'P':
- printk(KERN_INFO NAME ": GPIO%d pull up enabled\n", m);
+ dev_dbg(dev, "GPIO%d pull up enabled\n", m);
amp->gpio_config(m, ~4, 4);
break;
case 'p':
- printk(KERN_INFO NAME ": GPIO%d pull up disabled\n", m);
+ dev_dbg(dev, "GPIO%d pull up disabled\n", m);
amp->gpio_config(m, ~4, 0);
break;
-
case 'v':
/* View Current pin settings */
- amp->gpio_dump(m);
+ amp->gpio_dump(amp, m);
break;
case '\n':
/* end of settings string, do nothing */
break;
default:
- printk(KERN_ERR NAME
- ": GPIO-%2d bad setting: chr<0x%2x>\n", m,
- (int)c);
+ dev_err(dev, "io%2d bad setting: chr<0x%2x>\n",
+ m, (int)c);
err++;
}
}
ssize_t nsc_gpio_read(struct file *file, char __user * buf,
size_t len, loff_t * ppos)
{
- unsigned m = iminor(file->f_dentry->d_inode);
+ unsigned m = iminor(file->f_path.dentry->d_inode);
int value;
struct nsc_gpio_ops *amp = file->private_data;
return 1;
}
-/* common routines for both scx200_gpio and pc87360_gpio */
+/* common file-ops routines for both scx200_gpio and pc87360_gpio */
EXPORT_SYMBOL(nsc_gpio_write);
EXPORT_SYMBOL(nsc_gpio_read);
+EXPORT_SYMBOL(nsc_gpio_dump);
static int __init nsc_gpio_init(void)
{