CW integration and minnow bringup

  * create minnow machine type
  * create Android makefile
  * add pre-commit syntax check
  * enable -Werror
  * Add drivers: CPCAP, TPS65xxx, m4sensorhub, atmxt, lm3535,
                 usb gadget, minnow display, TI 12xx wireless

Change-Id: I7962f5e1256715f2452aed5a62a4f2f2383d5046

1 files changed, 558 insertions, 0 deletions

diff --git a/drivers/misc/m4sensorhub_display.c b/drivers/misc/m4sensorhub_display.c
new file mode 100644
index 00000000000..2bc96643d89
--- /dev/null
+++ b/drivers/misc/m4sensorhub_display.c
@@ -0,0 +1,558 @@
+/*
+ *  Copyright (C) 2013 Motorola, Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  Adds ability to program periodic interrupts from user space that
+ *  can wake the phone out of low power modes.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/platform_device.h>
+#include <linux/proc_fs.h>
+#include <linux/input.h>
+#include <linux/regulator/consumer.h>
+#include <linux/m4sensorhub.h>
+#include <linux/m4sensorhub_client_ioctl.h>
+#include <linux/uaccess.h>
+#include <linux/time.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+
+#define DISPLAY_CLIENT_DRIVER_NAME "m4sensorhub_display"
+#define SENSORHUB_MIPI_DRIVER_REGULATOR "vcsi"
+#define SYNC_CLOCK_RETRY_TIMES		3
+#define INVALID_UTC_TIME		0xFFFFFFFF
+
+struct display_client {
+	struct m4sensorhub_data *m4sensorhub;
+	struct regulator *regulator;
+	atomic_t m4_lockcnt;
+	struct mutex m4_mutex;
+	int gpio_mipi_mux;
+	int m4_control;
+	int m4_enable;
+	int timezone_offset;
+	int m4_timezone_offset;
+	int dailystep_offset;
+	int m4_dailystep_offset;
+};
+
+struct display_client *global_display_data;
+
+static u32 m4_display_get_clock(void);
+static u32 m4_display_get_kernel_clock(void);
+static int m4_display_set_clock(u32 ms);
+static int m4_display_sync_timezone(struct display_client *data);
+static int m4_display_sync_dailystep(struct display_client *data);
+static int m4_display_sync_clock(void);
+static int m4_display_sync_state(struct display_client *display_data);
+static int m4_display_lock(struct display_client *display_data, int lock);
+static int m4_display_set_control(int m4_ctrl, int gpio_mipi_mux);
+
+static int display_client_open(struct inode *inode, struct file *file)
+{
+	int ret = -EFAULT;
+	KDEBUG(M4SH_DEBUG, "%s:\n", __func__);
+	if (global_display_data) {
+		ret = nonseekable_open(inode, file);
+		if (ret >= 0) {
+			file->private_data = global_display_data;
+			ret = 0;
+		}
+	}
+	if (ret)
+		KDEBUG(M4SH_ERROR, "%s: failed, err=%d\n", __func__, -ret);
+	return ret;
+}
+
+static int display_client_close(struct inode *inode, struct file *file)
+{
+	KDEBUG(M4SH_DEBUG, "%s:\n", __func__);
+	file->private_data = NULL;
+	return 0;
+}
+
+static long display_client_ioctl(
+	struct file *filp,
+	unsigned int cmd, unsigned long arg)
+{
+	void __user *argp = (void __user *)arg;
+	struct display_client *display_data = filp->private_data;
+	int value;
+
+	switch (cmd) {
+	case M4_SENSOR_IOCTL_SET_TIMEZONE_OFFSET:
+		if (copy_from_user(&value, argp, sizeof(value)))
+			return -EFAULT;
+		KDEBUG(M4SH_INFO, "%s update timezone offset %d\n",\
+				__func__, value);
+		m4_display_lock(display_data, true);
+		display_data->timezone_offset = value;
+		value = m4_display_sync_timezone(display_data);
+		/* sync M4 clock every time when app set timezone offset */
+		/* FIXME:Setting rtc clock on M4 happens in M4 ISR and leads to
+		* i2c timeout for the first clock set, this causes the bus to
+		* fail for a few mins on klockworks,hence commenting this part
+		* of the code until fixed for klockworks
+		if (value == 0)
+			m4_display_sync_clock();
+		*/
+		m4_display_lock(display_data, false);
+		return value;
+	case M4_SENSOR_IOCTL_SET_DAILYSTEP_OFFSET:
+		if (copy_from_user(&value, argp, sizeof(value)))
+			return -EFAULT;
+		KDEBUG(M4SH_INFO, "%s update dailystep offset %d\n",\
+				__func__, value);
+		display_data->dailystep_offset = value;
+		return m4_display_sync_dailystep(display_data);
+	case M4_SENSOR_IOCTL_LOCK_CLOCKFACE:
+		if (copy_from_user(&value, argp, sizeof(value)))
+			return -EFAULT;
+		return m4_display_lock(display_data, value);
+	default:
+		KDEBUG(M4SH_ERROR, "%s Invaild ioctl cmd %d\n", __func__, cmd);
+		break;
+	}
+	return -EINVAL;
+}
+
+/* Get current M4 RTC time of seconds elapsed since 00:00:00
+ *   on January 1, 1970, Coordinated Universal Time
+ * return 0xFFFFFFFF if it's something wrong
+ */
+static u32 m4_display_get_clock(void)
+{
+	u32 seconds;
+	struct display_client *data = global_display_data;
+	if (m4sensorhub_reg_getsize(data->m4sensorhub,\
+		M4SH_REG_GENERAL_UTC) != m4sensorhub_reg_read(\
+		data->m4sensorhub, M4SH_REG_GENERAL_UTC,\
+		(char *)&seconds)) {
+		seconds = INVALID_UTC_TIME;
+		KDEBUG(M4SH_ERROR, "%s: Failed get M4 clock!\n", __func__);
+	}
+	return seconds;
+}
+
+/* Set current M4 RTC time of seconds elapsed since 00:00:00
+ *   on January 1, 1970, Coordinated Universal Time
+ * return < 0 if it's something wrong
+ */
+static int m4_display_set_clock(u32 seconds)
+{
+	struct display_client *data = global_display_data;
+	if (m4sensorhub_reg_getsize(data->m4sensorhub,\
+		M4SH_REG_GENERAL_UTC) != m4sensorhub_reg_write(\
+		data->m4sensorhub, M4SH_REG_GENERAL_UTC,\
+		(char *)&seconds, m4sh_no_mask)) {
+		KDEBUG(M4SH_ERROR, "%s: Failed set M4 clock!\n", __func__);
+		return -EIO;
+	}
+	return 0;
+}
+
+static void m4_notify_clock_change(void)
+{
+	struct display_client *data = global_display_data;
+	char notify = 1;
+	if (m4sensorhub_reg_getsize(data->m4sensorhub,\
+		M4SH_REG_USERSETTINGS_RTCRESET) != m4sensorhub_reg_write(\
+		data->m4sensorhub, M4SH_REG_USERSETTINGS_RTCRESET,\
+		&notify, m4sh_no_mask)) {
+		KDEBUG(M4SH_ERROR, "Failed to notify clock change");
+	}
+}
+
+/* Get current Kernel RTC time of seconds elapsed since 00:00:00
+ *   on January 1, 1970, Coordinated Universal Time
+ */
+static u32 m4_display_get_kernel_clock(void)
+{
+	struct timespec now = current_kernel_time();
+	/* adjust with 500ms */
+	if (now.tv_nsec > 500000000)
+		now.tv_sec++;
+	return (u32)now.tv_sec;
+}
+
+void print_time(char *info, u32 time)
+{
+	struct tm t; /* it convert to year since 1900 */
+	time_to_tm((time_t)(time), 0, &t);
+	KDEBUG(M4SH_INFO, "%s(%d) %02d:%02d:%02d %02d/%02d/%04d\n",\
+		info, (int)time, t.tm_hour, t.tm_min, t.tm_sec,\
+		t.tm_mon+1, t.tm_mday, (int)t.tm_year+1900);
+}
+
+/* Sync M4 clock with current kernel time */
+static int m4_display_sync_clock(void)
+{
+	int retry = 0;
+	do {
+		u32 m4_time = m4_display_get_clock();
+		u32 kernel_time = m4_display_get_kernel_clock();
+		u32 diff_time = m4_time > kernel_time \
+			? m4_time-kernel_time : kernel_time-m4_time;
+#ifdef	DEBUG_CLOCK
+		print_time("M4 :", m4_time);
+		print_time("KNL:", kernel_time);
+#endif
+		/* it needs adjust M4 time if different large than 1 second */
+		if (diff_time < 2) {
+			if (retry) {
+				print_time("Synced M4 clock to", m4_time);
+				m4_notify_clock_change();
+			}
+			return 0;
+		}
+		m4_display_set_clock(kernel_time);
+	} while (retry++ < SYNC_CLOCK_RETRY_TIMES);
+	KDEBUG(M4SH_ERROR, "%s: Failed to sync M4 clock!\n",  __func__);
+	return -EIO;
+}
+
+/* Sync M4 TimeZone offset */
+static int m4_display_sync_timezone(struct display_client *data)
+{
+	if (data->m4_timezone_offset == data->timezone_offset)
+		return 0;
+	if (m4sensorhub_reg_getsize(data->m4sensorhub,\
+		M4SH_REG_GENERAL_LOCALTIMEZONE) != m4sensorhub_reg_write(\
+		data->m4sensorhub, M4SH_REG_GENERAL_LOCALTIMEZONE,\
+		(char *)&(data->timezone_offset), m4sh_no_mask)) {
+		KDEBUG(M4SH_ERROR, "%s: Failed set M4 timezone!\n", __func__);
+		return -EIO;
+	}
+	data->m4_timezone_offset = data->timezone_offset;
+	return 0;
+}
+
+/* Sync M4 Daily Steps offset */
+static int m4_display_sync_dailystep(struct display_client *data)
+{
+	if (data->m4_dailystep_offset == data->dailystep_offset)
+		return 0;
+	if (m4sensorhub_reg_getsize(data->m4sensorhub,\
+		M4SH_REG_TIMEPIECE_OFFSETSTEPS) != m4sensorhub_reg_write(\
+		data->m4sensorhub, M4SH_REG_TIMEPIECE_OFFSETSTEPS,\
+		(char *)&(data->dailystep_offset), m4sh_no_mask)) {
+		KDEBUG(M4SH_ERROR, "%s: Failed set M4 dailystep!\n", __func__);
+		return -EIO;
+	}
+	data->m4_dailystep_offset = data->dailystep_offset;
+	return 0;
+}
+
+/* Sync M4 clockface state, it will be enable only when clockface is unlocked
+ */
+static int m4_display_sync_state(struct display_client *display_data)
+{
+	int enable = !!display_data->m4_control;
+	if (atomic_inc_return(&(display_data->m4_lockcnt)) != 1)
+		enable = 0;
+	atomic_dec(&(display_data->m4_lockcnt));
+
+	mutex_lock(&(display_data->m4_mutex));
+	if (enable == display_data->m4_enable)
+		goto __done__;
+	if (enable) {
+		/* switch display control to M4 */
+		m4_display_sync_clock();
+		m4_display_sync_timezone(display_data);
+		m4_display_sync_dailystep(display_data);
+		gpio_set_value(display_data->gpio_mipi_mux, 1);
+		if (regulator_enable(display_data->regulator)) {
+			KDEBUG(M4SH_ERROR, "Failed enable regulator!\n");
+			goto __error__;
+		}
+	}
+	/* comunicate with M4 via I2C */
+	if (1 != m4sensorhub_reg_write_1byte(\
+		display_data->m4sensorhub,\
+		M4SH_REG_TIMEPIECE_ENABLE, enable, 0xFF)) {
+		KDEBUG(M4SH_ERROR, "Failed set m4 display!\n");
+		goto __error__;
+	}
+	if (!enable) {
+		mdelay(2);
+		/* switch display control to OMAP */
+		regulator_disable(display_data->regulator);
+		gpio_set_value(display_data->gpio_mipi_mux, 0);
+	}
+	display_data->m4_enable = enable;
+	KDEBUG(M4SH_INFO, "Synced M4 display state(%d)\n", enable);
+__done__:
+	mutex_unlock(&(display_data->m4_mutex));
+	return 0;
+__error__:
+	/* when error occured, it always set control to OMAP */
+	regulator_disable(display_data->regulator);
+	gpio_set_value(display_data->gpio_mipi_mux, 0);
+	mutex_unlock(&(display_data->m4_mutex));
+	KDEBUG(M4SH_ERROR, "Failed sync m4 with state(%d)!\n", enable);
+	return -EIO;
+}
+
+/* M4 clockface lock/unlock */
+static int m4_display_lock(struct display_client *display_data, int lock)
+{
+	if (lock) {
+		atomic_inc(&(display_data->m4_lockcnt));
+	} else {
+		if (atomic_dec_return(&(display_data->m4_lockcnt)) == -1) {
+			atomic_inc(&(display_data->m4_lockcnt));
+			KDEBUG(M4SH_ERROR, "%s zero unlock count!\n",\
+				__func__);
+			return -EINVAL;
+		}
+	}
+	return m4_display_sync_state(display_data);
+}
+
+static int m4_display_set_control(int m4_ctrl, int gpio_mipi_mux)
+{
+	struct display_client *display_data = global_display_data;
+	KDEBUG(M4SH_INFO, "%s(%d)\n", __func__, m4_ctrl);
+
+	if (!display_data || !display_data->m4sensorhub || (gpio_mipi_mux < 0))
+		return -EINVAL;
+
+	if (m4_ctrl == display_data->m4_control) {
+		KDEBUG(M4SH_DEBUG, "%s is already set!\n", __func__);
+		return 0;
+	}
+
+	display_data->gpio_mipi_mux = gpio_mipi_mux;
+	display_data->m4_control = m4_ctrl;
+
+	return m4_display_sync_state(display_data);
+}
+
+int m4sensorhub_set_display_control(int m4_ctrl, int gpio_mipi_mux)
+{
+	return m4_display_set_control(m4_ctrl, gpio_mipi_mux);
+}
+EXPORT_SYMBOL_GPL(m4sensorhub_set_display_control);
+
+static ssize_t display_get_loglevel(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	uint64_t loglevel;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct display_client *display_data =
+		platform_get_drvdata(pdev);
+
+	m4sensorhub_reg_read(display_data->m4sensorhub,
+		M4SH_REG_LOG_LOGENABLE, (char *)&loglevel);
+	loglevel = get_log_level(loglevel, DISPLAY_MASK_BIT_1);
+	return sprintf(buf, "%d\n", (int)loglevel);
+}
+
+static ssize_t display_set_loglevel(struct device *dev,
+	struct device_attribute *attr,
+	const char *buf, size_t size)
+{
+	uint64_t level = 0;
+	uint64_t mask = 0x3;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct display_client *display_data =
+		platform_get_drvdata(pdev);
+
+	if ((strict_strtoul(buf, 10, (unsigned long *)&level)) < 0)
+		return -EINVAL;
+	if (level > M4_MAX_LOG_LEVEL) {
+		KDEBUG(M4SH_ERROR, " Invalid log level - %d\n", (int)level);
+		return -EINVAL;
+	}
+	mask <<= DISPLAY_MASK_BIT_1;
+	level <<= DISPLAY_MASK_BIT_1;
+	return m4sensorhub_reg_write(display_data->m4sensorhub,
+		M4SH_REG_LOG_LOGENABLE, (char *)&level, (unsigned char *)&mask);
+}
+
+static DEVICE_ATTR(LogLevel, 0664, \
+		display_get_loglevel, display_set_loglevel);
+
+static const struct file_operations display_client_fops = {
+	.owner = THIS_MODULE,
+	.unlocked_ioctl = display_client_ioctl,
+	.open  = display_client_open,
+	.release = display_client_close,
+};
+
+static struct miscdevice display_client_miscdrv = {
+	.minor = MISC_DYNAMIC_MINOR,
+	.name  = DISPLAY_CLIENT_DRIVER_NAME,
+	.fops = &display_client_fops,
+};
+
+/* display_panic_restore()
+
+   Panic Callback Handler is called after M4 has been restarted
+
+*/
+static void display_panic_restore(\
+	struct m4sensorhub_data *m4sensorhub, void *data)
+{
+	struct display_client *display_data = (struct display_client *)data;
+	display_data->m4_timezone_offset = 0;
+	display_data->m4_dailystep_offset = 0;
+	if (display_data->m4_enable) {
+		m4_display_sync_clock();
+		m4_display_sync_timezone(display_data);
+		m4_display_sync_dailystep(display_data);
+		/* comunicate with M4 via I2C */
+		if (1 != m4sensorhub_reg_write_1byte(\
+			display_data->m4sensorhub,\
+			M4SH_REG_TIMEPIECE_ENABLE, 1, 0xFF)) {
+			KDEBUG(M4SH_ERROR, "Failed re-enable m4 display!\n");
+			/* TODO retry ? */
+		}
+	}
+}
+
+static int display_client_probe(struct platform_device *pdev)
+{
+	int ret = -EINVAL;
+	struct display_client *display_data;
+	struct m4sensorhub_data *m4sensorhub = m4sensorhub_client_get_drvdata();
+
+	if (!m4sensorhub)
+		return -EFAULT;
+
+	display_data = kzalloc(sizeof(*display_data),
+						GFP_KERNEL);
+	if (!display_data)
+		return -ENOMEM;
+
+	display_data->m4sensorhub = m4sensorhub;
+	display_data->timezone_offset = 0;
+	display_data->dailystep_offset = 0;
+	display_data->m4_timezone_offset = 0;
+	display_data->m4_dailystep_offset = 0;
+
+	platform_set_drvdata(pdev, display_data);
+
+	display_data->regulator = regulator_get(NULL,
+					    SENSORHUB_MIPI_DRIVER_REGULATOR);
+	if (IS_ERR(display_data->regulator)) {
+		KDEBUG(M4SH_ERROR, "Error requesting %s regulator\n",
+			SENSORHUB_MIPI_DRIVER_REGULATOR);
+		ret = -EFAULT;
+		goto free_mem;
+	}
+
+	ret = misc_register(&display_client_miscdrv);
+	if (ret < 0) {
+		KDEBUG(M4SH_ERROR, "Error registering %s driver\n",
+				 DISPLAY_CLIENT_DRIVER_NAME);
+		goto disable_regulator;
+	}
+
+	if (device_create_file(&pdev->dev, &dev_attr_LogLevel)) {
+		KDEBUG(M4SH_ERROR, "Error creating %s sys entry\n",
+				DISPLAY_CLIENT_DRIVER_NAME);
+		ret = -EFAULT;
+		goto unregister_misc_device;
+	}
+
+	/* default to host control */
+	display_data->m4_control = 0;
+	display_data->m4_enable = 0;
+	atomic_set(&(display_data->m4_lockcnt), 0);
+	mutex_init(&(display_data->m4_mutex));
+
+	global_display_data = display_data;
+
+	m4sensorhub_panic_register(m4sensorhub, PANICHDL_DISPLAY_RESTORE,\
+					display_panic_restore, display_data);
+
+	KDEBUG(M4SH_INFO, "Initialized %s driver\n", __func__);
+	return 0;
+
+unregister_misc_device:
+	misc_deregister(&display_client_miscdrv);
+disable_regulator:
+	regulator_put(display_data->regulator);
+free_mem:
+	global_display_data = NULL;
+	platform_set_drvdata(pdev, NULL);
+	kfree(display_data);
+	return ret;
+}
+
+static int __exit display_client_remove(struct platform_device *pdev)
+{
+	struct display_client *display_data =
+						platform_get_drvdata(pdev);
+
+	display_data->m4sensorhub->pdev->set_display_control = NULL;
+	device_remove_file(&pdev->dev, &dev_attr_LogLevel);
+	misc_deregister(&display_client_miscdrv);
+	global_display_data = NULL;
+	regulator_put(display_data->regulator);
+	platform_set_drvdata(pdev, NULL);
+	display_data->m4sensorhub = NULL;
+	kfree(display_data);
+	return 0;
+}
+
+static void display_client_shutdown(struct platform_device *pdev)
+{
+	return;
+}
+
+static struct of_device_id m4display_match_tbl[] = {
+	{ .compatible = "mot,m4display" },
+	{},
+};
+
+static struct platform_driver display_client_driver = {
+	.probe		= display_client_probe,
+	.remove		= __exit_p(display_client_remove),
+	.shutdown	= display_client_shutdown,
+	.suspend	= NULL,
+	.resume		= NULL,
+	.driver		= {
+		.name	= DISPLAY_CLIENT_DRIVER_NAME,
+		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(m4display_match_tbl),
+	},
+};
+
+static int __init display_client_init(void)
+{
+	return platform_driver_register(&display_client_driver);
+}
+
+static void __exit display_client_exit(void)
+{
+	platform_driver_unregister(&display_client_driver);
+}
+
+module_init(display_client_init);
+module_exit(display_client_exit);
+
+MODULE_ALIAS("platform:display_client");
+MODULE_DESCRIPTION("M4 Sensor Hub AOD display driver");
+MODULE_AUTHOR("Motorola");
+MODULE_LICENSE("GPL");