[ARM] 4359/3: H1940: Add bluetooth support

This patch adds a small driver responsible for configuring the UART used
for the bluetooth chip and for enabling the bluetooth chipset.
Additionnaly, can trigger a led if the H1940 led driver is enabled.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-s3c2410/Makefile b/arch/arm/mach-s3c2410/Makefile
index 9a3d3d2..3e7a855 100644 (file)
--- a/arch/arm/mach-s3c2410/Makefile
+++ b/arch/arm/mach-s3c2410/Makefile
@@ -20,7 +20,7 @@ obj-$(CONFIG_S3C2410_CLOCK)   += clock.o
 # Machine support
 
 obj-$(CONFIG_ARCH_SMDK2410)    += mach-smdk2410.o
-obj-$(CONFIG_ARCH_H1940)       += mach-h1940.o
+obj-$(CONFIG_ARCH_H1940)       += mach-h1940.o h1940-bluetooth.o
 obj-$(CONFIG_PM_H1940)         += pm-h1940.o
 obj-$(CONFIG_MACH_N30)         += mach-n30.o
 obj-$(CONFIG_ARCH_BAST)                += mach-bast.o usb-simtec.o

diff --git a/arch/arm/mach-s3c2410/h1940-bluetooth.c b/arch/arm/mach-s3c2410/h1940-bluetooth.c
new file mode 100644 (file)
index 0000000..3c48886
--- /dev/null
+++ b/arch/arm/mach-s3c2410/h1940-bluetooth.c
@@ -0,0 +1,142 @@
+/*
+ * arch/arm/mach-s3c2410/h1940-bluetooth.c
+ * Copyright (c) Arnaud Patard <arnaud.patard@rtp-net.org>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ *         S3C2410 bluetooth "driver"
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/leds.h>
+#include <asm/arch/regs-gpio.h>
+#include <asm/hardware.h>
+#include <asm/arch/h1940-latch.h>
+
+#define DRV_NAME              "h1940-bt"
+
+#ifdef CONFIG_LEDS_H1940
+DEFINE_LED_TRIGGER(bt_led_trigger);
+#endif
+
+static int state;
+
+/* Bluetooth control */
+static void h1940bt_enable(int on)
+{
+       if (on) {
+#ifdef CONFIG_LEDS_H1940
+               /* flashing Blue */
+               led_trigger_event(bt_led_trigger, LED_HALF);
+#endif
+
+               /* Power on the chip */
+               h1940_latch_control(0, H1940_LATCH_BLUETOOTH_POWER);
+               /* Reset the chip */
+               mdelay(10);
+               s3c2410_gpio_setpin(S3C2410_GPH1, 1);
+               mdelay(10);
+               s3c2410_gpio_setpin(S3C2410_GPH1, 0);
+
+               state = 1;
+       }
+       else {
+#ifdef CONFIG_LEDS_H1940
+               led_trigger_event(bt_led_trigger, 0);
+#endif
+
+               s3c2410_gpio_setpin(S3C2410_GPH1, 1);
+               mdelay(10);
+               s3c2410_gpio_setpin(S3C2410_GPH1, 0);
+               mdelay(10);
+               h1940_latch_control(H1940_LATCH_BLUETOOTH_POWER, 0);
+
+               state = 0;
+       }
+}
+
+static ssize_t h1940bt_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+       return snprintf(buf, PAGE_SIZE, "%d\n", state);
+}
+
+static ssize_t h1940bt_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+       int new_state;
+       char *endp;
+
+       new_state = simple_strtoul(buf, &endp, 0);
+       if (*endp && !isspace(*endp))
+               return -EINVAL;
+
+       h1940bt_enable(new_state);
+
+       return count;
+}
+static DEVICE_ATTR(enable, 0644,
+               h1940bt_show,
+               h1940bt_store);
+
+static int __init h1940bt_probe(struct platform_device *pdev)
+{
+       /* Configures BT serial port GPIOs */
+       s3c2410_gpio_cfgpin(S3C2410_GPH0, S3C2410_GPH0_nCTS0);
+       s3c2410_gpio_pullup(S3C2410_GPH0, 1);
+       s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPH1_OUTP);
+       s3c2410_gpio_pullup(S3C2410_GPH1, 1);
+       s3c2410_gpio_cfgpin(S3C2410_GPH2, S3C2410_GPH2_TXD0);
+       s3c2410_gpio_pullup(S3C2410_GPH2, 1);
+       s3c2410_gpio_cfgpin(S3C2410_GPH3, S3C2410_GPH3_RXD0);
+       s3c2410_gpio_pullup(S3C2410_GPH3, 1);
+
+#ifdef CONFIG_LEDS_H1940
+       led_trigger_register_simple("h1940-bluetooth", &bt_led_trigger);
+#endif
+
+       /* disable BT by default */
+       h1940bt_enable(0);
+
+       return device_create_file(&pdev->dev, &dev_attr_enable);
+}
+
+static int h1940bt_remove(struct platform_device *pdev)
+{
+#ifdef CONFIG_LEDS_H1940
+       led_trigger_unregister_simple(bt_led_trigger);
+#endif
+       return 0;
+}
+
+
+static struct platform_driver h1940bt_driver = {
+       .driver         = {
+               .name   = DRV_NAME,
+       },
+       .probe          = h1940bt_probe,
+       .remove         = h1940bt_remove,
+};
+
+
+static int __init h1940bt_init(void)
+{
+       return platform_driver_register(&h1940bt_driver);
+}
+
+static void __exit h1940bt_exit(void)
+{
+       platform_driver_unregister(&h1940bt_driver);
+}
+
+module_init(h1940bt_init);
+module_exit(h1940bt_exit);
+
+MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
+MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip");
+MODULE_LICENSE("GPL");

diff --git a/arch/arm/mach-s3c2410/mach-h1940.c b/arch/arm/mach-s3c2410/mach-h1940.c
index 5d5f00e..5ccd0be 100644 (file)
--- a/arch/arm/mach-s3c2410/mach-h1940.c
+++ b/arch/arm/mach-s3c2410/mach-h1940.c
@@ -177,6 +177,11 @@ static struct platform_device s3c_device_leds = {
        .id               = -1,
 };
 
+static struct platform_device s3c_device_bluetooth = {
+       .name             = "h1940-bt",
+       .id               = -1,
+};
+
 static struct platform_device *h1940_devices[] __initdata = {
        &s3c_device_usb,
        &s3c_device_lcd,
@@ -185,6 +190,7 @@ static struct platform_device *h1940_devices[] __initdata = {
        &s3c_device_iis,
        &s3c_device_usbgadget,
        &s3c_device_leds,
+       &s3c_device_bluetooth,
 };
 
 static void __init h1940_map_io(void)