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|
/*
* viatel_cbp_power.c
*
* VIA CBP driver for Linux
*
* Copyright (C) 2009 VIA TELECOM Corporation, Inc.
* Author: VIA TELECOM Corporation, Inc.
*
* This package is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include <linux/ctype.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/wakelock.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <mach/viatel.h>
#include "core.h"
#define MDM_RST_LOCK_TIME (120)
#define MDM_RST_HOLD_DELAY (100) //ms
#define MDM_PWR_HOLD_DELAY (500) //ms
//#define VIA_AP_MODEM_DEBU
#ifdef VIA_AP_MODEM_DEBUG
#undef dbg
#define dbg(format, arg...) printk("[CBP_POWER]: " format "\n" , ## arg)
#else
#undef dbg
#define dbg(format, arg...) do {} while (0)
#endif
static struct wake_lock reset_lock;
void oem_power_off_modem(void)
{
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_PWR_EN)){
oem_gpio_direction_output(GPIO_VIATEL_MDM_PWR_EN, 0);
}
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_RST)){
oem_gpio_direction_output(GPIO_VIATEL_MDM_RST, 1);
/*just hold the reset pin if no power enable pin*/
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_PWR_EN)){
mdelay(MDM_RST_HOLD_DELAY);
oem_gpio_direction_output(GPIO_VIATEL_MDM_RST, 0);
}
}
}
EXPORT_SYMBOL(oem_power_off_modem);
ssize_t modem_power_show(
struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
int power = 0;
int ret = 0;
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_PWR_IND)){
power = !!oem_gpio_get_value(GPIO_VIATEL_MDM_PWR_IND);
}else if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_PWR_EN)){
printk("No MDM_PWR_IND, just detect MDM_PWR_EN\n");
power = !!oem_gpio_get_value(GPIO_VIATEL_MDM_PWR_EN);
}else if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_RST)){
printk("No MDM_PWR_IND, just detect MDM_PWR_RST\n");
power = !!oem_gpio_get_value(GPIO_VIATEL_MDM_RST);
}
if(power){
ret += sprintf(buf + ret, "on\n");
}else{
ret += sprintf(buf + ret, "off\n");
}
return ret;
}
ssize_t modem_power_store(
struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t n)
{
int power;
/* power the modem */
if ( !strncmp(buf, "on", strlen("on"))) {
power = 1;
}else if(!strncmp(buf, "off", strlen("off"))){
power = 0;
}else{
printk("%s: input %s is invalid.\n", __FUNCTION__, buf);
return n;
}
printk("Warnning: Power %s modem\n", power ? "on" : "off");
if(power){
#if 0
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_RST)){
oem_gpio_direction_output(GPIO_VIATEL_MDM_RST, 1);
mdelay(MDM_RST_HOLD_DELAY);
}
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_PWR_EN)){
oem_gpio_direction_output(GPIO_VIATEL_MDM_PWR_EN, 0);
mdelay(MDM_PWR_HOLD_DELAY);
}
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_PWR_EN)){
oem_gpio_direction_output(GPIO_VIATEL_MDM_PWR_EN, 1);
mdelay(MDM_PWR_HOLD_DELAY);
}
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_RST)){
oem_gpio_direction_output(GPIO_VIATEL_MDM_RST, 0);
mdelay(MDM_RST_HOLD_DELAY);
}
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_PWR_EN)){
oem_gpio_direction_output(GPIO_VIATEL_MDM_PWR_EN, 0);
}
#endif
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_PWR_EN)){
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_RST)){
oem_gpio_direction_output(GPIO_VIATEL_MDM_RST, 0);
mdelay(MDM_RST_HOLD_DELAY);
}
oem_gpio_direction_output(GPIO_VIATEL_MDM_PWR_EN, 1);
mdelay(MDM_PWR_HOLD_DELAY);
}
}else{
oem_power_off_modem();
}
return n;
}
ssize_t modem_reset_show(
struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
int reset = 0;
int ret = 0;
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_RST_IND)){
reset = !!oem_gpio_get_value(GPIO_VIATEL_MDM_RST_IND);
}else if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_RST)){
reset = !!oem_gpio_get_value(GPIO_VIATEL_MDM_RST);
}
if(reset){
ret += sprintf(buf + ret, "reset\n");
}else{
ret += sprintf(buf + ret, "work\n");
}
return ret;
}
ssize_t modem_reset_store(
struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t n)
{
/* reset the modem */
if ( !strncmp(buf, "reset", strlen("reset"))) {
wake_lock_timeout(&reset_lock, MDM_RST_LOCK_TIME * HZ);
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_RST)){
oem_gpio_direction_output(GPIO_VIATEL_MDM_RST, 1);
mdelay(MDM_RST_HOLD_DELAY);
oem_gpio_direction_output(GPIO_VIATEL_MDM_RST, 0);
mdelay(MDM_RST_HOLD_DELAY);
}
printk("Warnning: reset modem\n");
}
return n;
}
ssize_t modem_ets_select_show(
struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
int level = 0;
int ret = 0;
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_ETS_SEL)){
level = !!oem_gpio_get_value(GPIO_VIATEL_MDM_ETS_SEL);
}
ret += sprintf(buf, "%d\n", level);
return ret;
}
ssize_t modem_ets_select_store(
struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t n)
{
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_ETS_SEL)){
if ( !strncmp(buf, "1", strlen("1"))) {
oem_gpio_direction_output(GPIO_VIATEL_MDM_ETS_SEL, 1);
}else if( !strncmp(buf, "0", strlen("0"))){
oem_gpio_direction_output(GPIO_VIATEL_MDM_ETS_SEL, 0);
}else{
dbg("Unknow command.\n");
}
}
return n;
}
ssize_t modem_boot_select_show(
struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
int ret = 0;
int level = 0;
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_BOOT_SEL)){
level = !!oem_gpio_get_value(GPIO_VIATEL_MDM_BOOT_SEL);
}
ret += sprintf(buf, "%d\n", level);
return ret;
}
ssize_t modem_boot_select_store(
struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t n)
{
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_BOOT_SEL)){
if ( !strncmp(buf, "1", strlen("1"))) {
oem_gpio_direction_output(GPIO_VIATEL_MDM_BOOT_SEL, 1);
}else if( !strncmp(buf, "0", strlen("0"))){
oem_gpio_direction_output(GPIO_VIATEL_MDM_BOOT_SEL, 0);
}else{
dbg("Unknow command.\n");
}
}
return n;
}
#define modem_attr(_name) \
static struct kobj_attribute _name##_attr = { \
.attr = { \
.name = __stringify(_name), \
.mode = 0644, \
}, \
.show = modem_##_name##_show, \
.store = modem_##_name##_store, \
}
modem_attr(power);
modem_attr(reset);
modem_attr(ets_select);
modem_attr(boot_select);
static struct attribute *g_attr[] = {
&power_attr.attr,
&reset_attr.attr,
&ets_select_attr.attr,
&boot_select_attr.attr,
NULL
};
static struct attribute_group g_attr_group = {
.attrs = g_attr,
};
static void modem_shutdown(struct platform_device *dev)
{
oem_power_off_modem();
}
static struct platform_driver power_driver = {
.driver.name = "modem_power",
.shutdown = modem_shutdown,
};
static struct platform_device power_device = {
.name = "modem_power",
};
static struct kobject *modem_kobj;
static int __init viatel_power_init(void)
{
int ret = 0;
modem_kobj = viatel_kobject_add("modem");
if(!modem_kobj){
ret = -ENOMEM;
goto err_create_kobj;
}
ret = platform_device_register(&power_device);
if (ret) {
printk("platform_device_register failed\n");
goto err_platform_device_register;
}
ret = platform_driver_register(&power_driver);
if (ret) {
printk("platform_driver_register failed\n");
goto err_platform_driver_register;
}
wake_lock_init(&reset_lock, WAKE_LOCK_SUSPEND, "cbp_rst");
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_PWR_IND)){
oem_gpio_direction_input_for_irq(GPIO_VIATEL_MDM_PWR_IND);
}
if(GPIO_OEM_VALID(GPIO_VIATEL_MDM_RST_IND)){
oem_gpio_direction_input_for_irq(GPIO_VIATEL_MDM_RST_IND);
}
//oem_gpio_direction_output(GPIO_VIATEL_MDM_RST, 0);
//oem_gpio_direction_output(GPIO_VIATEL_MDM_PWR_EN, 1);
ret = sysfs_create_group(modem_kobj, &g_attr_group);
if(ret){
printk("sysfs_create_group failed\n");
goto err_sysfs_create_group;
}
return 0;
err_sysfs_create_group:
platform_driver_unregister(&power_driver);
err_platform_driver_register:
platform_device_unregister(&power_device);
err_platform_device_register:
err_create_kobj:
return ret;
}
static void __exit viatel_power_exit(void)
{
wake_lock_destroy(&reset_lock);
}
late_initcall_sync(viatel_power_init);
module_exit(viatel_power_exit);
|
