1 files changed, 339 insertions, 0 deletions

diff --git a/drivers/misc/modem_if/modem_modemctl_device_esc6270.c b/drivers/misc/modem_if/modem_modemctl_device_esc6270.c
new file mode 100644
index 0000000..df0ff80
--- /dev/null
+++ b/drivers/misc/modem_if/modem_modemctl_device_esc6270.c
@@ -0,0 +1,339 @@
+/* /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);
+
+	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) {
+			if (cp_dump_int)
+				phone_state = STATE_CRASH_EXIT;
+			else
+				phone_state = STATE_CRASH_RESET;
+			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