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/*
* Copyright (C) 2010 Samsung Electronics.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/platform_device.h>
#include "modem.h"
#include "modem_prj.h"
#include "modem_utils.h"
#define DPRAM_INIT_TIMEOUT (30 * HZ)
#define PIF_TIMEOUT (180 * HZ)
static irqreturn_t phone_active_handler(int irq, void *arg)
{
struct modem_ctl *mc = (struct modem_ctl *)arg;
int cp_on = gpio_get_value(mc->gpio_cp_on);
int cp_reset = gpio_get_value(mc->gpio_cp_reset);
int cp_active = gpio_get_value(mc->gpio_phone_active);
int old_state = mc->phone_state;
int new_state = mc->phone_state;
mif_info("old_state:%s cp_on:%d cp_reset:%d cp_active:%d\n",
get_cp_state_str(old_state), cp_on, cp_reset, cp_active);
if (cp_reset && cp_active) {
if (mc->phone_state == STATE_BOOTING) {
new_state = STATE_ONLINE;
mc->bootd->modem_state_changed(mc->bootd, new_state);
}
} else if (cp_reset && !cp_active) {
if (mc->phone_state == STATE_ONLINE) {
new_state = STATE_CRASH_EXIT;
mc->bootd->modem_state_changed(mc->bootd, new_state);
}
} else {
new_state = STATE_OFFLINE;
if (mc->bootd && mc->bootd->modem_state_changed)
mc->bootd->modem_state_changed(mc->bootd, new_state);
}
if (new_state != old_state) {
mif_err("%s: phone_state changed (%s -> %s\n)",
mc->name, get_cp_state_str(old_state),
get_cp_state_str(new_state));
}
return IRQ_HANDLED;
}
static int cbp82_on(struct modem_ctl *mc)
{
int cp_on = gpio_get_value(mc->gpio_cp_on);
int cp_off = gpio_get_value(mc->gpio_cp_off);
int cp_reset = gpio_get_value(mc->gpio_cp_reset);
int cp_active = gpio_get_value(mc->gpio_phone_active);
mif_err("+++\n");
mif_err("phone_state:%s cp_on:%d cp_off:%d cp_reset:%d cp_active:%d\n",
get_cp_state_str(mc->phone_state), cp_on, cp_off, cp_reset,
cp_active);
/* prevent sleep during bootloader downloading */
if (!wake_lock_active(&mc->mc_wake_lock))
wake_lock(&mc->mc_wake_lock);
gpio_set_value(mc->gpio_cp_on, 0);
gpio_set_value(mc->gpio_cp_off, 1);
gpio_set_value(mc->gpio_cp_reset, 0);
msleep(500);
cp_on = gpio_get_value(mc->gpio_cp_on);
cp_off = gpio_get_value(mc->gpio_cp_off);
cp_reset = gpio_get_value(mc->gpio_cp_reset);
cp_active = gpio_get_value(mc->gpio_phone_active);
mif_err("phone_state:%s cp_on:%d cp_off:%d cp_reset:%d cp_active:%d\n",
get_cp_state_str(mc->phone_state), cp_on, cp_off, cp_reset,
cp_active);
gpio_set_value(mc->gpio_cp_off, 0);
gpio_set_value(mc->gpio_cp_on, 1);
msleep(100);
gpio_set_value(mc->gpio_cp_reset, 1);
msleep(300);
cp_on = gpio_get_value(mc->gpio_cp_on);
cp_off = gpio_get_value(mc->gpio_cp_off);
cp_reset = gpio_get_value(mc->gpio_cp_reset);
cp_active = gpio_get_value(mc->gpio_phone_active);
mif_err("phone_state:%s cp_on:%d cp_off:%d cp_reset:%d cp_active:%d\n",
get_cp_state_str(mc->phone_state), cp_on, cp_off, cp_reset,
cp_active);
if (mc->gpio_pda_active)
gpio_set_value(mc->gpio_pda_active, 1);
if (mc->bootd)
mc->bootd->modem_state_changed(mc->bootd, STATE_BOOTING);
else
mif_err("no mc->bootd\n");
mif_err("---\n");
return 0;
}
static int cbp82_off(struct modem_ctl *mc)
{
struct link_device *ld = get_current_link(mc->bootd);
mif_err("+++\n");
gpio_set_value(mc->gpio_cp_reset, 0);
gpio_set_value(mc->gpio_cp_on, 0);
gpio_set_value(mc->gpio_cp_off, 1);
mc->bootd->modem_state_changed(mc->bootd, STATE_OFFLINE);
ld->mode = LINK_MODE_OFFLINE;
mif_err("---\n");
return 0;
}
static int cbp82_reset(struct modem_ctl *mc)
{
int ret = 0;
mif_debug("cbp82_reset()\n");
ret = cbp82_off(mc);
if (ret)
return -ENXIO;
msleep(100);
ret = cbp82_on(mc);
if (ret)
return -ENXIO;
return 0;
}
static int cbp82_boot_on(struct modem_ctl *mc)
{
struct link_device *ld = get_current_link(mc->bootd);
mif_info("+++\n");
ld->mode = LINK_MODE_BOOT;
mif_info("---\n");
return 0;
}
static int cbp82_boot_off(struct modem_ctl *mc)
{
struct link_device *ld = get_current_link(mc->bootd);
int ret;
mif_err("+++\n");
/* Wait here until the PHONE is up.
* Waiting as the this called from IOCTL->UM thread */
mif_err("Waiting for PHONE_START\n");
ret = wait_for_completion_timeout(&ld->init_cmpl, DPRAM_INIT_TIMEOUT);
if (!ret) {
/* ret == 0 on timeout */
mif_err("T-I-M-E-O-U-T (PHONE_START)\n");
cbp82_off(mc);
ret = -EIO;
goto exit;
}
mif_err("recv PHONE_START\n");
mif_err("Waiting for PIF_INIT_DONE\n");
ret = wait_for_completion_timeout(&ld->pif_cmpl, PIF_TIMEOUT);
if (!ret) {
/* ret == 0 on timeout */
mif_err("T-I-M-E-O-U-T (PIF_INIT_DONE)!!!\n");
cbp82_off(mc);
ret = -EIO;
goto exit;
}
mif_err("recv PIF_INIT_DONE\n");
mc->bootd->modem_state_changed(mc->bootd, STATE_ONLINE);
ret = 0;
exit:
wake_unlock(&mc->mc_wake_lock);
mif_err("---\n");
return ret;
}
static int cbp82_force_crash_exit(struct modem_ctl *mc)
{
struct link_device *ld = get_current_link(mc->bootd);
mif_err("device = %s\n", mc->bootd->name);
/* Make DUMP start */
ld->force_dump(ld, mc->bootd);
return 0;
}
static void cbp82_get_ops(struct modem_ctl *mc)
{
mc->ops.modem_on = cbp82_on;
mc->ops.modem_off = cbp82_off;
mc->ops.modem_reset = cbp82_reset;
mc->ops.modem_boot_on = cbp82_boot_on;
mc->ops.modem_boot_off = cbp82_boot_off;
mc->ops.modem_force_crash_exit = cbp82_force_crash_exit;
}
int cbp82_init_modemctl_device(struct modem_ctl *mc, struct modem_data *pdata)
{
int ret = 0;
int irq = 0;
unsigned long flag = 0;
mif_err("+++\n");
mc->gpio_cp_on = pdata->gpio_cp_on;
mc->gpio_cp_off = pdata->gpio_cp_off;
mc->gpio_cp_reset = pdata->gpio_cp_reset;
mc->gpio_phone_active = pdata->gpio_phone_active;
if (!mc->gpio_cp_on || !mc->gpio_cp_off || !mc->gpio_cp_reset
|| !mc->gpio_phone_active) {
mif_err("no GPIO data\n");
mif_err("---\n");
return -ENXIO;
}
mc->gpio_pda_active = pdata->gpio_pda_active;
gpio_set_value(mc->gpio_cp_reset, 0);
gpio_set_value(mc->gpio_cp_off, 1);
gpio_set_value(mc->gpio_cp_on, 0);
cbp82_get_ops(mc);
wake_lock_init(&mc->mc_wake_lock, WAKE_LOCK_SUSPEND, "cbp82_wake_lock");
mc->irq_phone_active = pdata->irq_phone_active;
if (!mc->irq_phone_active) {
mif_err("get irq fail\n");
mif_err("---\n");
return -1;
}
mif_info("PHONE_ACTIVE IRQ# = %d\n", mc->irq_phone_active);
irq = mc->irq_phone_active;
flag = IRQF_NO_SUSPEND | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
ret = request_irq(irq, phone_active_handler, flag, "cdma_active", mc);
if (ret) {
mif_err("request_irq fail (%d)\n", ret);
mif_err("---\n");
return ret;
}
ret = enable_irq_wake(irq);
if (ret)
mif_err("enable_irq_wake fail (%d)\n", ret);
mif_err("---\n");
return 0;
}
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