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/* linux/drivers/modem/modem.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/module.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/miscdevice.h>
#include <linux/uaccess.h>
#include <linux/fs.h>
#include <linux/io.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/wakelock.h>
#include <linux/platform_data/modem_na.h>
#include "modem_prj.h"
#include "modem_variation.h"
static struct modem_ctl *create_modemctl_device(struct platform_device *pdev)
{
int ret = 0;
struct modem_data *pdata;
struct modem_ctl *modemctl;
struct device *dev = &pdev->dev;
/* create modem control device */
modemctl = kzalloc(sizeof(struct modem_ctl), GFP_KERNEL);
if (!modemctl)
return NULL;
modemctl->dev = dev;
modemctl->phone_state = STATE_OFFLINE;
pdata = pdev->dev.platform_data;
modemctl->name = pdata->name;
/* init modemctl device for getting modemctl operations */
ret = call_modem_init_func(modemctl, pdata);
if (ret) {
printk(KERN_ERR "[MODEM_IF] call_modem_init_func is failed\n");
kfree(modemctl);
return NULL;
}
pr_debug("[MODEM_IF] %s:create_modemctl_device DONE\n", modemctl->name);
return modemctl;
}
static struct io_device *create_io_device(struct modem_io_t *io_t,
struct modem_ctl *modemctl, enum modem_network modem_net)
{
int ret = 0;
struct io_device *iod = NULL;
iod = kzalloc(sizeof(struct io_device), GFP_KERNEL);
if (!iod) {
pr_err("[MODEM_IF] io device memory alloc fail\n");
return NULL;
}
iod->name = io_t->name;
iod->id = io_t->id;
iod->format = io_t->format;
iod->io_typ = io_t->io_type;
iod->net_typ = modem_net;
/* link between io device and modem control */
iod->mc = modemctl;
if (iod->format == IPC_FMT)
modemctl->iod = iod;
/* register misc device or net device */
ret = init_io_device(iod);
if (ret) {
kfree(iod);
return NULL;
}
pr_debug("[MODEM_IF] %s : create_io_device DONE\n", io_t->name);
return iod;
}
static int __devinit modem_probe(struct platform_device *pdev)
{
int i;
struct modem_data *pdata;
struct modem_ctl *modemctl;
struct io_device *iod[MAX_NUM_IO_DEV];
struct link_device *ld;
struct io_raw_devices *io_raw_devs = NULL;
pdata = pdev->dev.platform_data;
memset(iod, 0, sizeof(iod));
modemctl = create_modemctl_device(pdev);
if (!modemctl) {
printk(KERN_ERR "[MODEM_IF] modemctl is null\n");
return -ENOMEM;
}
/* create link device */
ld = call_link_init_func(pdev, pdata->link_type);
if (!ld)
goto err_free_modemctl;
io_raw_devs = kzalloc(sizeof(struct io_raw_devices), GFP_KERNEL);
if (!io_raw_devs) {
printk(KERN_ERR "[MODEM_IF] io_raw_devs is null\n");
return -ENOMEM;
}
/* create io deivces and connect to modemctl device */
for (i = 0; i < pdata->num_iodevs; i++) {
iod[i] = create_io_device(&pdata->iodevs[i], modemctl,
pdata->modem_net);
if (!iod[i])
goto err_free_modemctl;
if (iod[i]->format == IPC_RAW) {
int ch = iod[i]->id & 0x1F;
io_raw_devs->raw_devices[ch] = iod[i];
io_raw_devs->num_of_raw_devs++;
iod[i]->link = ld;
} else {
/* connect io devices to one link device */
ld->attach(ld, iod[i]);
}
if (iod[i]->format == IPC_MULTI_RAW)
iod[i]->private_data = (void *)io_raw_devs;
}
platform_set_drvdata(pdev, modemctl);
pr_debug("[MODEM_IF] modem_probe DONE\n");
return 0;
err_free_modemctl:
for (i = 0; i < pdata->num_iodevs; i++)
if (iod[i] != NULL)
kfree(iod[i]);
if (io_raw_devs != NULL)
kfree(io_raw_devs);
if (modemctl != NULL)
kfree(modemctl);
return -ENOMEM;
}
static void modem_shutdown(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct modem_ctl *mc = dev_get_drvdata(dev);
if (!mc)
return;
free_irq(mc->irq_phone_active, mc);
if (mc->ops.modem_off)
mc->ops.modem_off(mc);
}
static int modem_suspend(struct device *pdev)
{
struct modem_ctl *mc = dev_get_drvdata(pdev);
gpio_set_value(mc->gpio_pda_active, 0);
return 0;
}
static int modem_resume(struct device *pdev)
{
struct modem_ctl *mc = dev_get_drvdata(pdev);
gpio_set_value(mc->gpio_pda_active, 1);
return 0;
}
static const struct dev_pm_ops modem_pm_ops = {
.suspend = modem_suspend,
.resume = modem_resume,
};
static struct platform_driver modem_driver = {
.probe = modem_probe,
.shutdown = modem_shutdown,
.driver = {
.name = "modem_if",
.pm = &modem_pm_ops,
},
};
static int __init modem_init(void)
{
return platform_driver_register(&modem_driver);
}
module_init(modem_init);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Samsung Modem Interface Driver");
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