samsung update 1

1 files changed, 334 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos/board-bluetooth-csr8811.c b/arch/arm/mach-exynos/board-bluetooth-csr8811.c
new file mode 100644
index 0000000..c3f46bb
--- /dev/null
+++ b/arch/arm/mach-exynos/board-bluetooth-csr8811.c
@@ -0,0 +1,334 @@
+/*
+ * Bluetooth CSR GPIO
+ *
+ *  Copyright (C) 2011 Samsung Electronics Co., Ltd.
+ *  Copyright (C) 2011 Google, 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
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/hrtimer.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/rfkill.h>
+#include <linux/serial_core.h>
+#include <linux/wakelock.h>
+
+#include <asm/mach-types.h>
+
+#include <mach/gpio.h>
+#include <plat/gpio-cfg.h>
+
+#define BT_UART_CFG
+#define BT_LPM_ENABLE
+
+#define IRQ_BT_HOST_WAKE	IRQ_EINT(22)
+
+static struct rfkill *bt_rfkill;
+
+struct csr_bt_lpm {
+	int wake;
+	int host_wake;
+
+	struct hrtimer enter_lpm_timer;
+	ktime_t enter_lpm_delay;
+
+	struct uart_port *uport;
+
+	struct wake_lock wake_lock;
+	char wake_lock_name[100];
+} bt_lpm;
+
+#ifdef BT_UART_CFG
+int bt_is_running;
+EXPORT_SYMBOL(bt_is_running);
+
+extern int s3c_gpio_slp_cfgpin(unsigned int pin, unsigned int config);
+extern int s3c_gpio_slp_setpull_updown(unsigned int pin, unsigned int config);
+
+static unsigned int bt_uart_on_table[][4] = {
+	{EXYNOS4_GPA0(0), 2, 2, S3C_GPIO_PULL_NONE},
+	{EXYNOS4_GPA0(1), 2, 2, S3C_GPIO_PULL_NONE},
+	{EXYNOS4_GPA0(2), 2, 2, S3C_GPIO_PULL_NONE},
+	{EXYNOS4_GPA0(3), 2, 2, S3C_GPIO_PULL_NONE},
+};
+
+void bt_config_gpio_table(int array_size, unsigned int (*gpio_table)[4])
+{
+	u32 i, gpio;
+
+	for (i = 0; i < array_size; i++) {
+		gpio = gpio_table[i][0];
+		s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(gpio_table[i][1]));
+		s3c_gpio_setpull(gpio, gpio_table[i][3]);
+		if (gpio_table[i][2] != 2)
+			gpio_set_value(gpio, gpio_table[i][2]);
+	}
+}
+
+void bt_uart_rts_ctrl(int flag)
+{
+	if (flag) {
+		/* BT RTS Set to HIGH */
+		s3c_gpio_cfgpin(EXYNOS4_GPA0(3), S3C_GPIO_OUTPUT);
+		s3c_gpio_setpull(EXYNOS4_GPA0(3), S3C_GPIO_PULL_NONE);
+		gpio_set_value(EXYNOS4_GPA0(3), 1);
+		s3c_gpio_slp_cfgpin(EXYNOS4_GPA0(3), S3C_GPIO_SLP_OUT0);
+		s3c_gpio_slp_setpull_updown(EXYNOS4_GPA0(3), S3C_GPIO_PULL_NONE);
+	} else {
+		/* BT RTS Set to LOW */
+		s3c_gpio_cfgpin(EXYNOS4_GPA0(3), S3C_GPIO_OUTPUT);
+		gpio_set_value(EXYNOS4_GPA0(3), 0);
+		s3c_gpio_cfgpin(EXYNOS4_GPA0(3), S3C_GPIO_SFN(2));
+		s3c_gpio_setpull(EXYNOS4_GPA0(3), S3C_GPIO_PULL_NONE);
+	}
+}
+EXPORT_SYMBOL(bt_uart_rts_ctrl);
+#endif
+
+static int csr8811_bt_rfkill_set_power(void *data, bool blocked)
+{
+	/* rfkill_ops callback. Turn transmitter on when blocked is false */
+	if (!blocked) {
+		pr_info("[BT] Bluetooth Power On.\n");
+#ifdef BT_UART_CFG
+		bt_config_gpio_table(ARRAY_SIZE(bt_uart_on_table),
+					bt_uart_on_table);
+#endif
+		msleep(20);
+		gpio_set_value(GPIO_BT_nRST, 1);
+		msleep(50);
+	} else {
+		pr_info("[BT] Bluetooth Power Off.\n");
+		bt_is_running = 0;
+		gpio_set_value(GPIO_BT_nRST, 0);
+	}
+	return 0;
+}
+
+static const struct rfkill_ops csr8811_bt_rfkill_ops = {
+	.set_block = csr8811_bt_rfkill_set_power,
+};
+
+#ifdef BT_LPM_ENABLE
+static void set_wake_locked(int wake)
+{
+	bt_lpm.wake = wake;
+
+	if (!wake)
+		wake_unlock(&bt_lpm.wake_lock);
+}
+
+static enum hrtimer_restart enter_lpm(struct hrtimer *timer)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&bt_lpm.uport->lock, flags);
+	bt_is_running = 0;
+	set_wake_locked(0);
+	spin_unlock_irqrestore(&bt_lpm.uport->lock, flags);
+
+	return HRTIMER_NORESTART;
+}
+
+void csr_bt_lpm_exit_lpm_locked(struct uart_port *uport)
+{
+	bt_lpm.uport = uport;
+
+	hrtimer_try_to_cancel(&bt_lpm.enter_lpm_timer);
+	bt_is_running = 1;
+	set_wake_locked(1);
+
+	hrtimer_start(&bt_lpm.enter_lpm_timer, bt_lpm.enter_lpm_delay,
+		HRTIMER_MODE_REL);
+}
+EXPORT_SYMBOL(csr_bt_lpm_exit_lpm_locked);
+
+static void update_host_wake_locked(int host_wake)
+{
+	if (host_wake == bt_lpm.host_wake)
+		return;
+
+	bt_lpm.host_wake = host_wake;
+
+	bt_is_running = 1;
+	if (host_wake) {
+		wake_lock(&bt_lpm.wake_lock);
+	} else  {
+		/* Take a timed wakelock, so that upper layers can take it.
+		 * The chipset deasserts the hostwake lock, when there is no
+		 * more data to send.
+		 */
+		wake_lock_timeout(&bt_lpm.wake_lock, 5*HZ);
+	}
+}
+
+static irqreturn_t host_wake_isr(int irq, void *dev)
+{
+	int host_wake;
+	unsigned long flags;
+
+	host_wake = gpio_get_value(GPIO_BT_HOST_WAKE);
+	irq_set_irq_type(irq, host_wake ? IRQF_TRIGGER_LOW : IRQF_TRIGGER_HIGH);
+
+	if (!bt_lpm.uport) {
+		bt_lpm.host_wake = host_wake;
+		return IRQ_HANDLED;
+	}
+
+	spin_lock_irqsave(&bt_lpm.uport->lock, flags);
+	update_host_wake_locked(host_wake);
+	spin_unlock_irqrestore(&bt_lpm.uport->lock, flags);
+
+	return IRQ_HANDLED;
+}
+
+static int csr_bt_lpm_init(struct platform_device *pdev)
+{
+	int irq;
+	int ret;
+
+	hrtimer_init(&bt_lpm.enter_lpm_timer, CLOCK_MONOTONIC,
+			HRTIMER_MODE_REL);
+	bt_lpm.enter_lpm_delay = ktime_set(1, 0);  /* 1 sec */
+	bt_lpm.enter_lpm_timer.function = enter_lpm;
+
+	bt_lpm.host_wake = 0;
+	bt_is_running = 0;
+
+	irq = IRQ_BT_HOST_WAKE;
+	ret = request_irq(irq, host_wake_isr, IRQF_TRIGGER_HIGH,
+		"bt host_wake", NULL);
+	if (ret) {
+		pr_err("[BT] Request_host wake irq failed.\n");
+		return ret;
+	}
+
+	ret = irq_set_irq_wake(irq, 1);
+	if (ret) {
+		pr_err("[BT] Set_irq_wake failed.\n");
+		return ret;
+	}
+
+	snprintf(bt_lpm.wake_lock_name, sizeof(bt_lpm.wake_lock_name),
+			"BTLowPower");
+	wake_lock_init(&bt_lpm.wake_lock, WAKE_LOCK_SUSPEND,
+			 bt_lpm.wake_lock_name);
+	return 0;
+}
+#endif
+
+static int csr8811_bluetooth_probe(struct platform_device *pdev)
+{
+	int rc = 0;
+	int ret;
+
+	printk("%s\n", __func__);
+
+	rc = gpio_request(GPIO_BT_nRST, "csr8811_btnrst_gpio");
+	if (unlikely(rc)) {
+		pr_err("[BT] GPIO_BT_nRST request failed.\n");
+		return rc;
+	}
+	rc = gpio_request(GPIO_BT_HOST_WAKE, "csr8811_bthostwake_gpio");
+	if (unlikely(rc)) {
+		pr_err("[BT] GPIO_BT_HOST_WAKE request failed.\n");
+		gpio_free(GPIO_BT_nRST);
+		return rc;
+	}
+	gpio_direction_input(GPIO_BT_HOST_WAKE);
+	gpio_direction_output(GPIO_BT_nRST, 0);
+
+	bt_rfkill = rfkill_alloc("csr8811 Bluetooth", &pdev->dev,
+				RFKILL_TYPE_BLUETOOTH, &csr8811_bt_rfkill_ops,
+				NULL);
+
+	if (unlikely(!bt_rfkill)) {
+		pr_err("[BT] bt_rfkill alloc failed.\n");
+		gpio_free(GPIO_BT_HOST_WAKE);
+		gpio_free(GPIO_BT_nRST);
+		return -ENOMEM;
+	}
+
+	rfkill_init_sw_state(bt_rfkill, 0);
+
+	rc = rfkill_register(bt_rfkill);
+
+	if (unlikely(rc)) {
+		pr_err("[BT] bt_rfkill register failed.\n");
+		rfkill_destroy(bt_rfkill);
+		gpio_free(GPIO_BT_HOST_WAKE);
+		gpio_free(GPIO_BT_nRST);
+		return -1;
+	}
+
+	rfkill_set_sw_state(bt_rfkill, true);
+
+#ifdef BT_LPM_ENABLE
+	ret = csr_bt_lpm_init(pdev);
+	if (ret) {
+		rfkill_unregister(bt_rfkill);
+		rfkill_destroy(bt_rfkill);
+
+		gpio_free(GPIO_BT_HOST_WAKE);
+		gpio_free(GPIO_BT_nRST);
+	}
+#endif
+	return rc;
+}
+
+static int csr8811_bluetooth_remove(struct platform_device *pdev)
+{
+	rfkill_unregister(bt_rfkill);
+	rfkill_destroy(bt_rfkill);
+
+	gpio_free(GPIO_BT_nRST);
+	gpio_free(GPIO_BT_HOST_WAKE);
+
+	wake_lock_destroy(&bt_lpm.wake_lock);
+	return 0;
+}
+
+static struct platform_driver csr8811_bluetooth_platform_driver = {
+	.probe = csr8811_bluetooth_probe,
+	.remove = csr8811_bluetooth_remove,
+	.driver = {
+		   .name = "csr8811_bluetooth",
+		   .owner = THIS_MODULE,
+		   },
+};
+
+static int __init csr8811_bluetooth_init(void)
+{
+	return platform_driver_register(&csr8811_bluetooth_platform_driver);
+}
+
+static void __exit csr8811_bluetooth_exit(void)
+{
+	platform_driver_unregister(&csr8811_bluetooth_platform_driver);
+}
+
+
+module_init(csr8811_bluetooth_init);
+module_exit(csr8811_bluetooth_exit);
+
+MODULE_ALIAS("platform:csr8811");
+MODULE_DESCRIPTION("csr8811_bluetooth");
+MODULE_LICENSE("GPL");