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/* /linux/drivers/misc/modem_if/modem_modemctl_device_xmm6260.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/platform_data/modem.h>
#include "modem_prj.h"
static int xmm6260_on(struct modem_ctl *mc)
{
pr_info("[MODEM_IF] xmm6260_on()\n");
if (!mc->gpio_cp_reset || !mc->gpio_cp_on || !mc->gpio_reset_req_n) {
pr_err("[MODEM_IF] no gpio data\n");
return -ENXIO;
}
gpio_set_value(mc->gpio_cp_on, 0);
gpio_set_value(mc->gpio_cp_reset, 0);
udelay(160);
gpio_set_value(mc->gpio_pda_active, 0);
msleep(100);
gpio_set_value(mc->gpio_cp_reset, 1);
udelay(160);
gpio_set_value(mc->gpio_reset_req_n, 1);
udelay(160);
gpio_set_value(mc->gpio_cp_on, 1);
udelay(60);
gpio_set_value(mc->gpio_cp_on, 0);
msleep(20);
gpio_set_value(mc->gpio_pda_active, 1);
mc->phone_state = STATE_BOOTING;
return 0;
}
static int xmm6260_off(struct modem_ctl *mc)
{
pr_info("[MODEM_IF] xmm6260_off()\n");
if (!mc->gpio_cp_reset || !mc->gpio_cp_on) {
pr_err("[MODEM_IF] no gpio data\n");
return -ENXIO;
}
gpio_set_value(mc->gpio_cp_on, 0);
gpio_set_value(mc->gpio_cp_reset, 0);
mc->phone_state = STATE_OFFLINE;
return 0;
}
static int xmm6260_reset(struct modem_ctl *mc)
{
int ret;
pr_info("[MODEM_IF] xmm6260_reset()\n");
ret = xmm6260_off(mc);
if (ret)
return ret;
msleep(100);
ret = xmm6260_on(mc);
if (ret)
return ret;
return 0;
}
static int xmm6260_boot_on(struct modem_ctl *mc)
{
pr_info("[MODEM_IF] xmm6260_boot_on()\n");
if (!mc->gpio_flm_uart_sel) {
pr_err("[MODEM_IF] no gpio data\n");
return -ENXIO;
}
gpio_set_value(mc->gpio_flm_uart_sel, 0);
return 0;
}
static int xmm6260_boot_off(struct modem_ctl *mc)
{
pr_info("[MODEM_IF] xmm6260_boot_off()\n");
if (!mc->gpio_flm_uart_sel) {
pr_err("[MODEM_IF] no gpio data\n");
return -ENXIO;
}
gpio_set_value(mc->gpio_flm_uart_sel, 1);
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;
int cp_dump_int = 0;
struct modem_ctl *mc = (struct modem_ctl *)_mc;
disable_irq_nosync(mc->irq_phone_active);
if (!mc->gpio_cp_reset || !mc->gpio_phone_active ||
!mc->gpio_cp_dump_int) {
pr_err("[MODEM_IF] 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);
cp_dump_int = gpio_get_value(mc->gpio_cp_dump_int);
pr_info("[MODEM_IF] PA EVENT : reset =%d, pa=%d, cp_dump=%d\n",
phone_reset, phone_active_value, cp_dump_int);
if (phone_reset && phone_active_value) {
phone_state = STATE_ONLINE;
if (mc->iod && mc->iod->modem_state_changed)
mc->iod->modem_state_changed(mc->iod, phone_state);
} else if (phone_reset && !phone_active_value) {
if ((mc->phone_state == STATE_ONLINE) &&
(mc->iod->link->com_state == COM_ONLINE)) {
phone_state = STATE_CRASH_EXIT;
if (mc->iod && mc->iod->modem_state_changed)
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_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);
enable_irq(mc->irq_phone_active);
return IRQ_HANDLED;
}
static void xmm6260_get_ops(struct modem_ctl *mc)
{
mc->ops.modem_on = xmm6260_on;
mc->ops.modem_off = xmm6260_off;
mc->ops.modem_reset = xmm6260_reset;
mc->ops.modem_boot_on = xmm6260_boot_on;
mc->ops.modem_boot_off = xmm6260_boot_off;
}
int xmm6260_init_modemctl_device(struct modem_ctl *mc,
struct modem_data *pdata)
{
int ret;
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;
pdev = to_platform_device(mc->dev);
mc->irq_phone_active = platform_get_irq(pdev, 0);
xmm6260_get_ops(mc);
ret = request_irq(mc->irq_phone_active, phone_active_irq_handler,
IRQF_NO_SUSPEND | IRQF_TRIGGER_HIGH,
"phone_active", mc);
if (ret) {
pr_err("[MODEM_IF] %s: failed to request_irq:%d\n",
__func__, ret);
return ret;
}
ret = enable_irq_wake(mc->irq_phone_active);
if (ret)
pr_err("[MODEM_IF] %s: failed to enable_irq_wake:%d\n",
__func__, ret);
return ret;
}
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