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/* /linux/drivers/misc/modem_if/modem_modemctl_device_qsc6085.c
*
* 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_link_device_dpram.h"
#include "modem_utils.h"
#define IDPRAM_NORMAL_BOOT_MAGIC 0x4D4E
static irqreturn_t phone_active_irq_handler(int irq, void *arg)
{
struct modem_ctl *mc = (struct modem_ctl *)arg;
int phone_reset = gpio_get_value(mc->gpio_cp_reset);
int phone_active = gpio_get_value(mc->gpio_phone_active);
int phone_state = mc->phone_state;
pr_info("MIF: <%s> state = %d, phone_reset = %d, phone_active = %d\n",
__func__, phone_state, phone_reset, phone_active);
if (phone_reset && phone_active) {
phone_state = STATE_ONLINE;
if (mc->phone_state != STATE_BOOTING)
mc->iod->modem_state_changed(mc->iod, phone_state);
} else if (phone_reset && !phone_active) {
if (mc->phone_state == STATE_ONLINE) {
phone_state = STATE_CRASH_EXIT;
mc->iod->modem_state_changed(mc->iod, phone_state);
}
} else {
phone_state = STATE_OFFLINE;
if (mc->iod && mc->iod->modem_state_changed)
mc->iod->modem_state_changed(mc->iod, phone_state);
}
if (phone_active)
irq_set_irq_type(mc->irq_phone_active, IRQ_TYPE_LEVEL_LOW);
else
irq_set_irq_type(mc->irq_phone_active, IRQ_TYPE_LEVEL_HIGH);
pr_info("MIF: <%s> phone_state = %d\n", __func__, phone_state);
return IRQ_HANDLED;
}
static void set_idpram_boot_magic(struct dpram_link_device *dpld)
{
dpld->set_access(dpld, 0);
dpld->set_magic(dpld, IDPRAM_NORMAL_BOOT_MAGIC);
dpld->set_access(dpld, 1);
}
static int qsc6085_on(struct modem_ctl *mc)
{
struct link_device *ld = get_current_link(mc->iod);
struct dpram_link_device *dpld = to_dpram_link_device(ld);
mif_err("+++\n");
if (!mc->gpio_cp_on || !mc->gpio_cp_reset) {
mif_err("no gpio_cp_on or no gpio_cp_reset\n");
return -ENXIO;
}
set_idpram_boot_magic(dpld);
mc->iod->modem_state_changed(mc->iod, STATE_BOOTING);
gpio_set_value(mc->gpio_cp_reset, 1);
gpio_set_value(mc->gpio_cp_on, 0);
msleep(100);
gpio_set_value(mc->gpio_cp_on, 1);
msleep(400);
msleep(400);
msleep(200);
gpio_set_value(mc->gpio_cp_on, 0);
mif_err("---\n");
return 0;
}
static int qsc6085_off(struct modem_ctl *mc)
{
int phone_wait_cnt = 0;
pr_info("MIF: <%s+>\n", __func__);
if (!mc->gpio_cp_on || !mc->gpio_cp_reset ||
!mc->gpio_phone_active) {
pr_err("MIF: <%s> no gpio data\n", __func__);
return -ENXIO;
}
gpio_set_value(mc->gpio_cp_on, 0);
/* confirm phone off */
while (1) {
if (gpio_get_value(mc->gpio_phone_active)) {
pr_err("MIF: <%s> Try to Turn Phone Off by CP_RST\n",
__func__);
gpio_set_value(mc->gpio_cp_reset, 0);
if (phone_wait_cnt > 10) {
pr_emerg("MIF: <%s> OFF Failed\n", __func__);
break;
}
phone_wait_cnt++;
mdelay(100);
} else {
pr_emerg("MIF: <%s> OFF Success\n", __func__);
break;
}
}
mc->iod->modem_state_changed(mc->iod, STATE_OFFLINE);
pr_info("MIF: <%s->\n", __func__);
return 0;
}
static int qsc6085_reset(struct modem_ctl *mc)
{
struct link_device *ld = get_current_link(mc->iod);
struct dpram_link_device *dpld = to_dpram_link_device(ld);
mif_err("+++\n");
set_idpram_boot_magic(dpld);
gpio_set_value(mc->gpio_cp_reset, 0);
msleep(100);
gpio_set_value(mc->gpio_cp_reset, 1);
mif_err("---\n");
return 0;
}
static int qsc6085_modem_dump_reset(struct modem_ctl *mc)
{
pr_info("MIF: <%s>\n", __func__);
panic("CP Crashed");
}
static void qsc6085_get_ops(struct modem_ctl *mc)
{
mc->ops.modem_on = qsc6085_on;
mc->ops.modem_off = qsc6085_off;
mc->ops.modem_reset = qsc6085_reset;
mc->ops.modem_dump_reset = qsc6085_modem_dump_reset;
}
int qsc6085_init_modemctl_device(struct modem_ctl *mc, struct modem_data *pdata)
{
int ret = 0;
unsigned long flag = 0;
mc->gpio_cp_on = pdata->gpio_cp_on;
mc->gpio_cp_reset = pdata->gpio_cp_reset;
mc->gpio_pda_active = pdata->gpio_pda_active;
mc->gpio_phone_active = pdata->gpio_phone_active;
mc->gpio_cp_dump_int = pdata->gpio_cp_dump_int;
if (!mc->gpio_cp_on || !mc->gpio_cp_reset || !mc->gpio_phone_active) {
mif_err("no GPIO data\n");
return -ENXIO;
}
mc->irq_phone_active = gpio_to_irq(mc->gpio_phone_active);
pr_err("MIF: <%s> PHONE_ACTIVE IRQ# = %d\n",
__func__, mc->irq_phone_active);
qsc6085_get_ops(mc);
/*register phone_active_handler*/
flag = IRQF_TRIGGER_HIGH;
ret = request_irq(mc->irq_phone_active,
phone_active_irq_handler,
flag, "phone_active", mc);
if (ret) {
pr_err("MIF: failed to irq_phone_active request_irq: %d\n"
, ret);
return ret;
}
ret = enable_irq_wake(mc->irq_phone_active);
if (ret) {
pr_err("MIF: <%s> failed to enable_irq_wake:%d\n",
__func__, ret);
free_irq(mc->irq_phone_active, mc);
return ret;
}
return ret;
}
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