diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/mach-wmt/gpio_ctrl.c')
| -rwxr-xr-x | ANDROID_3.4.5/arch/arm/mach-wmt/gpio_ctrl.c | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mach-wmt/gpio_ctrl.c b/ANDROID_3.4.5/arch/arm/mach-wmt/gpio_ctrl.c deleted file mode 100755 index 8c1c2d76..00000000 --- a/ANDROID_3.4.5/arch/arm/mach-wmt/gpio_ctrl.c +++ /dev/null @@ -1,202 +0,0 @@ -/*
- * procfs1.c - create a "file" in /proc
- *
- */
-#include <linux/module.h> /* Specifically, a module */
-#include <linux/kernel.h> /* We're doing kernel work */
-#include <linux/proc_fs.h> /* Necessary because we use the proc fs */
-#include <linux/gpio.h>
-#include <mach/wmt_iomux.h>
-#include <asm/uaccess.h> //for copy_from_user
-#include <linux/delay.h> // for mdelay
-
-#define DRIVER_AUTHOR "rubbitxiao "
-#define DRIVER_DESC "printer power control"
-
-
-#define procfs_name "gpio_ctrl"
-
-extern int wmt_getsyspara(char *varname, unsigned char *varval, int *varlen);
-extern struct proc_dir_entry proc_root;
-/**
- * This structure hold information about the /proc file
- *
- */
-static struct proc_dir_entry *Our_Proc_File;
-
-int power_on = -1; //control printer power on/off
-int lid_stat = -1; //inflext printer lid open or close status
-
-enum{
- LOW=0,
- HIGH,
-};
-
-/* Put data into the proc fs file.
- *
- * Arguments
- * =========
- * 1. The buffer where the data is to be inserted, if
- * you decide to use it.
- * 2. A pointer to a pointer to characters. This is
- * useful if you don't want to use the buffer
- * allocated by the kernel.
- * 3. The current position in the file
- * 4. The size of the buffer in the first argument.
- * 5. Write a "1" here to indicate EOF.
- * 6. A pointer to data (useful in case one common
- * read for multiple /proc/... entries)
- *
- * Usage and Return Value
- * ======================
- * A return value of zero means you have no further
- * information at this time (end of file). A negative
- * return value is an error condition.
- *
- * For More Information
- * ====================
- * The way I discovered what to do with this function
- * wasn't by reading documentation, but by reading the
- * code which used it. I just looked to see what uses
- * the get_info field of proc_dir_entry struct (I used a
- * combination of find and grep, if you're interested),
- * and I saw that it is used in <kernel source
- * directory>/fs/proc/array.c.
- *
- * If something is unknown about the kernel, this is
- * usually the way to go. In Linux we have the great
- * advantage of having the kernel source code for
- * free - use it.
- */
-static int
-procfile_read(char *buffer,
- char **buffer_location,
- off_t offset, int buffer_length, int *eof, void *data)
-{
- int ret;
- int value = -1;
-
- if (offset > 0) {
- /* we have finished to read, return 0 */
- ret = 0;
- } else {
- if(lid_stat >=0){
- gpio_direction_input(lid_stat);
- value = __gpio_get_value(lid_stat);
- /* fill the buffer, return the buffer size */
- ret = sprintf(buffer,"%d",value);
- }else{
- printk("err! have not set wmt.gpo.printer uboot variant\n");
- ret = -1;
- }
- }
-
- return ret;
-}
-
-
-static int procfile_write(struct file *file, const char __user *buffer,
- unsigned long count, void *data)
-{
- int ret = 0;
- char tmp[128];
- int num;
-
- int on = 0;
-
- if(buffer && !copy_from_user(tmp, buffer, sizeof(tmp))) {
-
- num = sscanf(tmp, "%d", &on);
- printk("your input power on/off:%d\n",on);
- if(power_on<0){
- printk("err! have not set wmt.gpo.printer uboot variant\n");
- return -1;
- }
- if(on){
- gpio_direction_output(power_on, HIGH);
- mdelay(200);
- printk("power on printer\n");
- }else{
- gpio_direction_output(power_on, LOW);
- printk("power off printer\n");
- }
-
- return strlen(tmp);
- }else{
- printk("copy_from_user failed or buffer is null\n");
- return -1;
- }
-}
-
-
-static int __init wifi_proc_init(void)
-{
- int retval = 0;
- int varlen = 127;
- char buf[200]={0};
-
- Our_Proc_File = create_proc_entry(procfs_name, 0644, NULL);
-
- if (Our_Proc_File == NULL) {
- remove_proc_entry(procfs_name, NULL);
- printk(KERN_ALERT "Error: Could not initialize /proc/%s\n",
- procfs_name);
- return -ENOMEM;
- }
- /*
- * wmt.gpo.printer format as follows:
- * power_on:lid_stat
- * for example: setenv wmt.gpo.printer 153:3
- * gpio8 for power on; gpio9 for lid status
- */
- retval = wmt_getsyspara("wmt.gpo.printer", buf, &varlen);
- if(!retval)
- {
- sscanf(buf, "%d:%d",&power_on,&lid_stat);
- printk("power_on:%d,lid_stat:%d\n", power_on,lid_stat);
- //request gpio for printer power control
- retval = gpio_request(power_on, "printer power pin");
- if(retval < 0) {
- printk("reques gpio:%x failed!!! for printer power pin\n",power_on);
- return -1;
- }else{
- printk("request gpio:%d for printer power pin success!!!\n", power_on);
- }
- //request gpio for printer lid status
- retval = gpio_request(lid_stat, "printer lid status");
- if(retval < 0) {
- printk("reques gpio:%x failed!!! for printer lid status\n",lid_stat);
- return -1;
- }else{
- printk("request gpio:%d for printer lid status success!!!\n", lid_stat);
- }
- }else{
- printk("have not set wmt.gpo.printer");
- }
-
- Our_Proc_File->read_proc = procfile_read;
- Our_Proc_File->write_proc = procfile_write;
- Our_Proc_File->mode = S_IFREG | S_IRUGO;
- Our_Proc_File->uid = 0;
- Our_Proc_File->gid = 0;
- Our_Proc_File->size = 37;
-
- return 0; /* everything is ok */
-}
-
-static void __exit wifi_proc_uninit(void)
-{
- remove_proc_entry(procfs_name, NULL);
- if(power_on)
- gpio_free(power_on);
- if(lid_stat)
- gpio_free(lid_stat);
-}
-
-
-module_init(wifi_proc_init);
-module_exit(wifi_proc_uninit);
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
-MODULE_VERSION("1.0");
|