diff options
Diffstat (limited to 'drivers/misc/modem_if/modem_modemctl_device_qsc6085.c')
| -rw-r--r-- | drivers/misc/modem_if/modem_modemctl_device_qsc6085.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/drivers/misc/modem_if/modem_modemctl_device_qsc6085.c b/drivers/misc/modem_if/modem_modemctl_device_qsc6085.c new file mode 100644 index 0000000..25d3cfe --- /dev/null +++ b/drivers/misc/modem_if/modem_modemctl_device_qsc6085.c @@ -0,0 +1,218 @@ +/* /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; +} |