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/* /linux/drivers/misc/modem_if/modem_modemctl_device_esc6270.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_device.h>
#include <linux/platform_data/modem.h>
#include "modem_prj.h"
#include <linux/regulator/consumer.h>
#include <plat/gpio-cfg.h>
#if defined(CONFIG_LINK_DEVICE_DPRAM)
#include "modem_link_device_dpram.h"
#elif defined(CONFIG_LINK_DEVICE_PLD)
#include "modem_link_device_pld.h"
#endif
#if defined(CONFIG_LINK_DEVICE_DPRAM) || defined(CONFIG_LINK_DEVICE_PLD)
#include <linux/mfd/max77693.h>
#define PIF_TIMEOUT (180 * HZ)
#define DPRAM_INIT_TIMEOUT (30 * HZ)
static int esc6270_on(struct modem_ctl *mc)
{
int ret;
struct link_device *ld = get_current_link(mc->iod);
pr_info("[MODEM_IF:ESC] <%s> start!!!\n", __func__);
if (!mc->gpio_cp_reset) {
pr_err("[MODEM_IF:ESC] no gpio data\n");
return -ENXIO;
}
if (mc->gpio_reset_req_n)
gpio_set_value(mc->gpio_reset_req_n, 1);
gpio_set_value(mc->gpio_cp_reset, 1);
msleep(30);
gpio_set_value(mc->gpio_cp_on, 1);
msleep(500);
gpio_set_value(mc->gpio_cp_on, 0);
msleep(500);
gpio_set_value(mc->gpio_pda_active, 1);
mc->iod->modem_state_changed(mc->iod, STATE_BOOTING);
ld->mode = LINK_MODE_BOOT;
return 0;
}
static int esc6270_off(struct modem_ctl *mc)
{
pr_info("[MODEM_IF:ESC] esc6270_off()\n");
#if 1
if (!mc->gpio_cp_reset) {
pr_err("[MODEM_IF:ESC] no gpio data\n");
return -ENXIO;
}
gpio_set_value(mc->gpio_cp_reset, 0);
gpio_set_value(mc->gpio_cp_on, 0);
#endif
mc->iod->modem_state_changed(mc->iod, STATE_OFFLINE);
return 0;
}
static int esc6270_reset(struct modem_ctl *mc)
{
int ret = 0;
pr_debug("[MODEM_IF:ESC] esc6270_reset()\n");
ret = esc6270_off(mc);
if (ret)
return -ENXIO;
msleep(100);
ret = esc6270_on(mc);
if (ret)
return -ENXIO;
return 0;
}
int esc6270_boot_on(struct modem_ctl *mc)
{
struct link_device *ld = get_current_link(mc->iod);
#if defined(CONFIG_LINK_DEVICE_DPRAM)
/* clear intr */
struct dpram_link_device *dpld = to_dpram_link_device(ld);
u16 recv_msg = dpld->recv_intr(dpld);
pr_info("[MODEM_IF:ESC] dpram intr: %x\n", recv_msg);
#endif
pr_info("[MODEM_IF:ESC] <%s>\n", __func__);
/* Need to init uart byt gpio_flm_uart_sel GPIO */
if (!mc->gpio_cp_reset || !mc->gpio_flm_uart_sel) {
pr_err("[MODEM_IF:ESC] no gpio data\n");
return -ENXIO;
}
gpio_set_value(mc->gpio_flm_uart_sel, 1);
pr_info(" - ESC_PHONE_ON : %d, ESC_RESET_N : %d\n",
gpio_get_value(mc->gpio_cp_on),
gpio_get_value(mc->gpio_cp_reset));
gpio_set_value(mc->gpio_cp_on, 0);
gpio_direction_output(mc->gpio_cp_reset, 0);
msleep(100);
gpio_direction_output(mc->gpio_cp_on, 1);
msleep(44);
pr_info(" - ESC_PHONE_ON : %d, ESC_RESET_N : %d\n",
gpio_get_value(mc->gpio_cp_on),
gpio_get_value(mc->gpio_cp_reset));
gpio_direction_input(mc->gpio_cp_reset);
msleep(600);
gpio_direction_output(mc->gpio_cp_on, 0);
msleep(20);
pr_info(" - ESC_PHONE_ON : %d, ESC_RESET_N : %d\n",
gpio_get_value(mc->gpio_cp_on),
gpio_get_value(mc->gpio_cp_reset));
#if defined(CONFIG_LINK_DEVICE_PLD)
gpio_direction_output(mc->gpio_fpga_cs_n, 1);
#endif
mc->iod->modem_state_changed(mc->iod, STATE_BOOTING);
ld->mode = LINK_MODE_BOOT;
return 0;
}
static int esc6270_boot_off(struct modem_ctl *mc)
{
pr_info("[MODEM_IF:ESC] <%s>\n", __func__);
if (!mc->gpio_flm_uart_sel) {
pr_err("[MODEM_IF:ESC] no gpio data\n");
return -ENXIO;
}
gpio_set_value(mc->gpio_flm_uart_sel, 0);
mc->iod->modem_state_changed(mc->iod, STATE_OFFLINE);
return 0;
}
static int esc6270_active_count;
static irqreturn_t phone_active_irq_handler(int irq, void *arg)
{
struct modem_ctl *mc = (struct modem_ctl *)arg;
int phone_reset = 0;
int phone_active = 0;
int phone_state = 0;
int cp_dump_int = 0;
if (!mc->gpio_cp_reset ||
!mc->gpio_phone_active) { /* || !mc->gpio_cp_dump_int) { */
pr_err("[MODEM_IF:ESC] no gpio data\n");
return IRQ_HANDLED;
}
phone_reset = gpio_get_value(mc->gpio_cp_reset);
phone_active = gpio_get_value(mc->gpio_phone_active);
cp_dump_int = gpio_get_value(mc->gpio_cp_dump_int);
pr_info("[MODEM_IF:ESC] <%s> phone_reset=%d, phone_active=%d, cp_dump_int=%d\n",
__func__, phone_reset, phone_active, cp_dump_int);
if (phone_reset && phone_active) {
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) {
if (mc->phone_state == STATE_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)
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("[MODEM_IF::ESC] <%s> phone_state = %d\n",
__func__, phone_state);
return IRQ_HANDLED;
}
#if defined(CONFIG_SIM_DETECT)
static irqreturn_t sim_detect_irq_handler(int irq, void *_mc)
{
struct modem_ctl *mc = (struct modem_ctl *)_mc;
pr_info("[MODEM_IF:ESC] <%s> gpio_sim_detect = %d\n",
__func__, gpio_get_value(mc->gpio_sim_detect));
if (mc->iod && mc->iod->sim_state_changed)
mc->iod->sim_state_changed(mc->iod,
!gpio_get_value(mc->gpio_sim_detect));
return IRQ_HANDLED;
}
#endif
static void esc6270_get_ops(struct modem_ctl *mc)
{
mc->ops.modem_on = esc6270_on;
mc->ops.modem_off = esc6270_off;
mc->ops.modem_reset = esc6270_reset;
mc->ops.modem_boot_on = esc6270_boot_on;
mc->ops.modem_boot_off = esc6270_boot_off;
}
int esc6270_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_sim_detect = pdata->gpio_sim_detect;
#if defined(CONFIG_LINK_DEVICE_PLD)
mc->gpio_fpga_cs_n = pdata->gpio_fpga1_cs_n;
#endif
gpio_set_value(mc->gpio_cp_reset, 0);
gpio_set_value(mc->gpio_cp_on, 0);
pdev = to_platform_device(mc->dev);
mc->irq_phone_active = platform_get_irq_byname(pdev, "cp_active_irq");
pr_info("[MODEM_IF:ESC] <%s> PHONE_ACTIVE IRQ# = %d\n",
__func__, mc->irq_phone_active);
esc6270_get_ops(mc);
if (mc->irq_phone_active) {
ret = request_irq(mc->irq_phone_active,
phone_active_irq_handler,
IRQF_TRIGGER_HIGH,
"esc_active",
mc);
if (ret) {
pr_err("[MODEM_IF:ESC] <%s> failed to request_irq IRQ# %d (err=%d)\n",
__func__, mc->irq_phone_active, ret);
return ret;
}
ret = enable_irq_wake(mc->irq_phone_active);
if (ret) {
pr_err("[MODEM_IF:ESC] %s: failed to enable_irq_wake IRQ# %d (err=%d)\n",
__func__, mc->irq_phone_active, ret);
free_irq(mc->irq_phone_active, mc);
return ret;
}
}
#if defined(CONFIG_SIM_DETECT)
mc->irq_sim_detect = platform_get_irq_byname(pdev, "sim_irq");
pr_info("[MODEM_IF:ESC] <%s> SIM_DECTCT IRQ# = %d\n",
__func__, mc->irq_sim_detect);
if (mc->irq_sim_detect) {
ret = request_irq(mc->irq_sim_detect, sim_detect_irq_handler,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
"esc_sim_detect", mc);
if (ret) {
mif_err("failed to request_irq: %d\n", ret);
mc->sim_state.online = false;
mc->sim_state.changed = false;
return ret;
}
ret = enable_irq_wake(mc->irq_sim_detect);
if (ret) {
mif_err("failed to enable_irq_wake: %d\n", ret);
free_irq(mc->irq_sim_detect, mc);
mc->sim_state.online = false;
mc->sim_state.changed = false;
return ret;
}
/* initialize sim_state => insert: gpio=0, remove: gpio=1 */
mc->sim_state.online = !gpio_get_value(mc->gpio_sim_detect);
}
#endif
return ret;
}
#endif
|
