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/* /linux/drivers/misc/modem_if/modem_modemctl_device_cbp7.1.c
*
* Copyright (C) 2010 Google, Inc.
* 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_data/modem.h>
#include "modem_prj.h"
#include "modem_link_device_dpram.h"
#define PIF_TIMEOUT (180 * HZ)
#define DPRAM_INIT_TIMEOUT (15 * HZ)
static int cbp71_on(struct modem_ctl *mc)
{
int RetVal = 0;
int dpram_init_RetVal = 0;
struct link_device *ld = get_current_link(mc->iod);
struct dpram_link_device *dpram_ld = to_dpram_link_device(ld);
mif_info("cbp71_on()\n");
if (!mc->gpio_cp_off || !mc->gpio_cp_reset) {
mif_err("no gpio data\n");
return -ENXIO;
}
gpio_set_value(mc->gpio_cp_reset, 0);
msleep(600);
gpio_set_value(mc->gpio_cp_reset, 1);
msleep(100);
gpio_set_value(mc->gpio_cp_off, 0);
msleep(300);
gpio_set_value(mc->gpio_pda_active, 1);
mc->iod->modem_state_changed(mc->iod, STATE_BOOTING);
/* Wait here until the PHONE is up.
* Waiting as the this called from IOCTL->UM thread */
mif_debug("power control waiting for INT_MASK_CMD_PIF_INIT_DONE\n");
/* 1HZ = 1 clock tick, 100 default */
dpram_ld->clear_interrupt(dpram_ld);
dpram_init_RetVal =
wait_event_interruptible_timeout(
dpram_ld->dpram_init_cmd_wait_q,
dpram_ld->dpram_init_cmd_wait_condition,
DPRAM_INIT_TIMEOUT);
if (!dpram_init_RetVal) {
/*RetVal will be 0 on timeout, non zero if interrupted */
mif_err("INIT_START cmd was not arrived.\n");
mif_err("init_cmd_wait_condition is 0 and wait timeout happend\n");
return -ENXIO;
}
RetVal = wait_event_interruptible_timeout(
dpram_ld->modem_pif_init_done_wait_q,
dpram_ld->modem_pif_init_wait_condition,
PIF_TIMEOUT);
if (!RetVal) {
/*RetVal will be 0 on timeout, non zero if interrupted */
mif_err("PIF init failed\n");
mif_err("pif_init_wait_condition is 0 and wait timeout happend\n");
return -ENXIO;
}
mif_debug("complete cbp71_on\n");
mc->iod->modem_state_changed(mc->iod, STATE_ONLINE);
return 0;
}
static int cbp71_off(struct modem_ctl *mc)
{
mif_debug("cbp71_off()\n");
if (!mc->gpio_cp_off || !mc->gpio_cp_reset) {
mif_err("no gpio data\n");
return -ENXIO;
}
mif_err("Phone power Off. - do nothing\n");
mc->iod->modem_state_changed(mc->iod, STATE_OFFLINE);
return 0;
}
static int cbp71_reset(struct modem_ctl *mc)
{
int ret = 0;
mif_debug("cbp71_reset()\n");
ret = cbp71_off(mc);
if (ret)
return -ENXIO;
msleep(100);
ret = cbp71_on(mc);
if (ret)
return -ENXIO;
return 0;
}
static int cbp71_boot_on(struct modem_ctl *mc)
{
mif_debug("cbp71_boot_on()\n");
if (!mc->gpio_cp_reset) {
mif_err("no gpio data\n");
return -ENXIO;
}
gpio_set_value(mc->gpio_cp_reset, 0);
msleep(600);
gpio_set_value(mc->gpio_cp_reset, 1);
mc->iod->modem_state_changed(mc->iod, STATE_BOOTING);
return 0;
}
static int cbp71_boot_off(struct modem_ctl *mc)
{
mif_debug("cbp71_boot_off()\n");
return 0;
}
static irqreturn_t phone_active_irq_handler(int irq, void *_mc)
{
int phone_reset = 0;
int phone_active_value = 0;
int phone_state = 0;
struct modem_ctl *mc = (struct modem_ctl *)_mc;
if (!mc->gpio_cp_reset || !mc->gpio_phone_active) {
mif_err("no gpio data\n");
return IRQ_HANDLED;
}
phone_reset = gpio_get_value(mc->gpio_cp_reset);
phone_active_value = gpio_get_value(mc->gpio_phone_active);
if (phone_reset && phone_active_value)
phone_state = STATE_ONLINE;
else if (phone_reset && !phone_active_value)
phone_state = STATE_CRASH_EXIT;
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_value)
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);
mif_info("phone_active_irq_handler : phone_state=%d\n", phone_state);
return IRQ_HANDLED;
}
static void cbp71_get_ops(struct modem_ctl *mc)
{
mc->ops.modem_on = cbp71_on;
mc->ops.modem_off = cbp71_off;
mc->ops.modem_reset = cbp71_reset;
mc->ops.modem_boot_on = cbp71_boot_on;
mc->ops.modem_boot_off = cbp71_boot_off;
}
int cbp71_init_modemctl_device(struct modem_ctl *mc,
struct modem_data *pdata)
{
int ret = 0;
struct platform_device *pdev;
mc->gpio_cp_on = pdata->gpio_cp_on;
mc->gpio_reset_req_n = pdata->gpio_reset_req_n;
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;
mc->gpio_flm_uart_sel = pdata->gpio_flm_uart_sel;
mc->gpio_cp_warm_reset = pdata->gpio_cp_warm_reset;
mc->gpio_cp_off = pdata->gpio_cp_off;
pdev = to_platform_device(mc->dev);
mc->irq_phone_active = platform_get_irq(pdev, 0);
cbp71_get_ops(mc);
/*TODO: check*/
ret = request_irq(mc->irq_phone_active, phone_active_irq_handler,
IRQF_TRIGGER_HIGH, "phone_active", mc);
if (ret) {
mif_err("failed to irq_phone_active request_irq: %d\n"
, ret);
return ret;
}
ret = enable_irq_wake(mc->irq_phone_active);
if (ret)
mif_err("failed to enable_irq_wake:%d\n", ret);
return ret;
}
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