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From 51990833d84bdff24a384119a9ba0cf815edd683 Mon Sep 17 00:00:00 2001
From: mokopatches <mokopatches@openmoko.org>
Date: Wed, 16 Jul 2008 14:44:49 +0100
Subject: [PATCH] gta01-vibrator.patch
This patch adds driver support for the vibator device of the FIC/OpenMoko
Neo1973 GSM phone. The driver uses the existing LED class driver framework,
since there's a lot of similarity between the LED and the vibrator function.
Signed-off-by: Harald Welte <laforge@openmoko.org>
---
drivers/leds/Kconfig | 8 ++-
drivers/leds/Makefile | 1 +
drivers/leds/leds-neo1973-vibrator.c | 181 ++++++++++++++++++++++++++++++++++
3 files changed, 189 insertions(+), 1 deletions(-)
create mode 100644 drivers/leds/leds-neo1973-vibrator.c
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 86a369b..8c7d949 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -47,7 +47,7 @@ config LEDS_SPITZ
config LEDS_S3C24XX
tristate "LED Support for Samsung S3C24XX GPIO LEDs"
- depends on LEDS_CLASS && ARCH_S3C2410
+ depends on LEDS_CLASS && ARCH_S3C2410 && S3C2410_PWM
help
This option enables support for LEDs connected to GPIO lines
on Samsung S3C24XX series CPUs, such as the S3C2410 and S3C2440.
@@ -147,6 +147,12 @@ config LEDS_CLEVO_MAIL
To compile this driver as a module, choose M here: the
module will be called leds-clevo-mail.
+config LEDS_NEO1973_VIBRATOR
+ tristate "Vibrator Support for the FIC Neo1973 GSM phone"
+ depends on LEDS_CLASS && MACH_NEO1973
+ help
+ This option enables support for the vibrator on the FIC Neo1973.
+
comment "LED Triggers"
config LEDS_TRIGGERS
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 973d626..148fe51 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_LEDS_CM_X270) += leds-cm-x270.o
obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o
obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o
obj-$(CONFIG_LEDS_FSG) += leds-fsg.o
+obj-$(CONFIG_LEDS_NEO1973_VIBRATOR) += leds-neo1973-vibrator.o
# LED Triggers
obj-$(CONFIG_LEDS_TRIGGER_TIMER) += ledtrig-timer.o
diff --git a/drivers/leds/leds-neo1973-vibrator.c b/drivers/leds/leds-neo1973-vibrator.c
new file mode 100644
index 0000000..0336e36
--- /dev/null
+++ b/drivers/leds/leds-neo1973-vibrator.c
@@ -0,0 +1,181 @@
+/*
+ * LED driver for the vibrator of the FIC Neo1973 GSM Phone
+ *
+ * (C) 2006-2007 by OpenMoko, Inc.
+ * Author: Harald Welte <laforge@openmoko.org>
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Javi Roman <javiroman@kernel-labs.org>:
+ * Implement PWM support for GTA01Bv4 and later
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/arch/pwm.h>
+#include <asm/arch/gta01.h>
+#include <asm/plat-s3c/regs-timer.h>
+
+#define COUNTER 64
+
+struct neo1973_vib_priv {
+ struct led_classdev cdev;
+ unsigned int gpio;
+ struct mutex mutex;
+ unsigned int has_pwm;
+ struct s3c2410_pwm pwm;
+};
+
+static void neo1973_vib_vib_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct neo1973_vib_priv *vp =
+ container_of(led_cdev, struct neo1973_vib_priv, cdev);
+
+ /*
+ * value == 255 -> 99% duty cycle (full power)
+ * value == 128 -> 50% duty cycle (medium power)
+ * value == 0 -> 0% duty cycle (zero power)
+ */
+ mutex_lock(&vp->mutex);
+ if (vp->has_pwm)
+ s3c2410_pwm_duty_cycle(value/4, &vp->pwm);
+ else {
+ if (value)
+ s3c2410_gpio_setpin(vp->gpio, 1);
+ else
+ s3c2410_gpio_setpin(vp->gpio, 0);
+ }
+
+ mutex_unlock(&vp->mutex);
+}
+
+static struct neo1973_vib_priv neo1973_vib_led = {
+ .cdev = {
+ .name = "neo1973:vibrator",
+ .brightness_set = neo1973_vib_vib_set,
+ },
+};
+
+static int neo1973_vib_init_hw(struct neo1973_vib_priv *vp)
+{
+ int rc;
+
+ rc = s3c2410_pwm_init(&vp->pwm);
+ if (rc)
+ return rc;
+
+ vp->pwm.timerid = PWM3;
+ /* use same prescaler as arch/arm/plat-s3c24xx/time.c */
+ vp->pwm.prescaler = (6 - 1) / 2;
+ vp->pwm.divider = S3C2410_TCFG1_MUX3_DIV2;
+ vp->pwm.counter = COUNTER;
+ vp->pwm.comparer = COUNTER;
+
+ rc = s3c2410_pwm_enable(&vp->pwm);
+ if (rc)
+ return rc;
+
+ s3c2410_pwm_start(&vp->pwm);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int neo1973_vib_suspend(struct platform_device *dev, pm_message_t state)
+{
+ led_classdev_suspend(&neo1973_vib_led.cdev);
+ return 0;
+}
+
+static int neo1973_vib_resume(struct platform_device *dev)
+{
+ struct neo1973_vib_priv *vp = platform_get_drvdata(dev);
+
+ if (vp->has_pwm)
+ neo1973_vib_init_hw(vp);
+
+ led_classdev_resume(&neo1973_vib_led.cdev);
+
+ return 0;
+}
+#endif /* CONFIG_PM */
+
+static int __init neo1973_vib_probe(struct platform_device *pdev)
+{
+ struct resource *r;
+ int rc;
+
+ if (!machine_is_neo1973_gta01())
+ return -EIO;
+
+ r = platform_get_resource(pdev, 0, 0);
+ if (!r || !r->start)
+ return -EIO;
+
+ neo1973_vib_led.gpio = r->start;
+ platform_set_drvdata(pdev, &neo1973_vib_led);
+
+ /* TOUT3 */
+ if (neo1973_vib_led.gpio == S3C2410_GPB3) {
+ rc = neo1973_vib_init_hw(&neo1973_vib_led);
+ if (rc)
+ return rc;
+
+ s3c2410_pwm_duty_cycle(0, &neo1973_vib_led.pwm);
+ s3c2410_gpio_cfgpin(neo1973_vib_led.gpio, S3C2410_GPB3_TOUT3);
+ neo1973_vib_led.has_pwm = 1;
+ }
+
+ mutex_init(&neo1973_vib_led.mutex);
+
+ return led_classdev_register(&pdev->dev, &neo1973_vib_led.cdev);
+}
+
+static int neo1973_vib_remove(struct platform_device *pdev)
+{
+ if (neo1973_vib_led.has_pwm)
+ s3c2410_pwm_disable(&neo1973_vib_led.pwm);
+
+ led_classdev_unregister(&neo1973_vib_led.cdev);
+
+ mutex_destroy(&neo1973_vib_led.mutex);
+
+ return 0;
+}
+
+static struct platform_driver neo1973_vib_driver = {
+ .probe = neo1973_vib_probe,
+ .remove = neo1973_vib_remove,
+#ifdef CONFIG_PM
+ .suspend = neo1973_vib_suspend,
+ .resume = neo1973_vib_resume,
+#endif
+ .driver = {
+ .name = "neo1973-vibrator",
+ },
+};
+
+static int __init neo1973_vib_init(void)
+{
+ return platform_driver_register(&neo1973_vib_driver);
+}
+
+static void __exit neo1973_vib_exit(void)
+{
+ platform_driver_unregister(&neo1973_vib_driver);
+}
+
+module_init(neo1973_vib_init);
+module_exit(neo1973_vib_exit);
+
+MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
+MODULE_DESCRIPTION("FIC Neo1973 vibrator driver");
+MODULE_LICENSE("GPL");
--
1.5.6.3
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