/*
- * Copyright (C) 2012 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2012-2013 Freescale Semiconductor, Inc. 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 as published by
#include <mach/iomux-mx6sl.h>
#include <mach/imx-uart.h>
#include <mach/viv_gpu.h>
+#include <mach/imx_rfkill.h>
#include <asm/irq.h>
#include <asm/setup.h>
imx6sl_add_imx_uart(1, &mx6sl_evk_uart1_data);
}
+static void mx6sl_evk_bt_reset(void)
+{
+ gpio_request(MX6SL_BRD_BT_RESET, "bt-reset");
+ gpio_direction_output(MX6SL_BRD_BT_RESET, 0);
+ /* pull down reset pin at least >5ms */
+ mdelay(6);
+ /* pull up after power supply BT */
+ gpio_set_value(MX6SL_BRD_BT_RESET, 1);
+ gpio_free(MX6SL_BRD_BT_RESET);
+}
+
+static int mx6sl_evk_bt_power_change(int status)
+{
+ if (status)
+ mx6sl_evk_bt_reset();
+ return 0;
+}
+
+static struct platform_device mxc_bt_rfkill = {
+ .name = "mxc_bt_rfkill",
+};
+
+static struct imx_bt_rfkill_platform_data mxc_bt_rfkill_data = {
+ .power_change = mx6sl_evk_bt_power_change,
+};
+
static void mx6sl_evk_suspend_enter()
{
iomux_v3_cfg_t *p = suspend_enter_pads;
if (uart2_enabled)
uart2_init();
+ mxc_register_device(&mxc_bt_rfkill, &mxc_bt_rfkill_data);
+
imx6q_add_viim();
imx6q_add_imx2_wdt(0, NULL);
--- /dev/null
+/*
+ * Copyright (C) 2012-2013 Freescale Semiconductor, Inc. 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 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*!
+ * @file mx6_bt_rfkill.c
+ *
+ * @brief This driver is implement a rfkill control interface of bluetooth
+ * chip on i.MX serial boards. Register the power regulator function and
+ * reset function in platform data.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/suspend.h>
+#include <linux/init.h>
+#include <linux/rfkill.h>
+#include <mach/hardware.h>
+#include <mach/imx_rfkill.h>
+
+static int system_in_suspend;
+
+static int mxc_bt_set_block(void *rfkdata, bool blocked)
+{
+ struct imx_bt_rfkill_platform_data *data = rfkdata;
+ int ret;
+
+ /* Bluetooth stack will reset the bluetooth chip during
+ * resume, since we keep bluetooth's power during suspend,
+ * don't let rfkill to actually reset the chip. */
+ if (system_in_suspend)
+ return 0;
+ pr_info("rfkill: BT RF going to : %s\n", blocked ? "off" : "on");
+ if (!blocked)
+ ret = data->power_change(1);
+ else
+ ret = data->power_change(0);
+
+ return ret;
+}
+
+static const struct rfkill_ops mxc_bt_rfkill_ops = {
+ .set_block = mxc_bt_set_block,
+};
+
+static int mxc_bt_power_event(struct notifier_block *this,
+ unsigned long event, void *dummy)
+{
+ switch (event) {
+ case PM_SUSPEND_PREPARE:
+ system_in_suspend = 1;
+ /* going to suspend, don't reset chip */
+ break;
+ case PM_POST_SUSPEND:
+ system_in_suspend = 0;
+ /* System is resume, can reset chip */
+ break;
+ default:
+ break;
+ }
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block mxc_bt_power_notifier = {
+ .notifier_call = mxc_bt_power_event,
+};
+
+static int mxc_bt_rfkill_probe(struct platform_device *dev)
+{
+ int rc;
+ struct rfkill *rfk;
+
+ struct imx_bt_rfkill_platform_data *data = dev->dev.platform_data;
+
+ if (data->power_change == NULL) {
+ rc = -EINVAL;
+ dev_err(&dev->dev, "no power_change function\n");
+ goto error_check_func;
+ }
+
+ rc = register_pm_notifier(&mxc_bt_power_notifier);
+ if (rc)
+ goto error_check_func;
+
+ rfk = rfkill_alloc("mxc-bt", &dev->dev, RFKILL_TYPE_BLUETOOTH,
+ &mxc_bt_rfkill_ops, data);
+
+ if (!rfk) {
+ rc = -ENOMEM;
+ goto error_rfk_alloc;
+ }
+
+ rc = rfkill_register(rfk);
+ if (rc)
+ goto error_rfkill;
+
+ platform_set_drvdata(dev, rfk);
+ printk(KERN_INFO "mxc_bt_rfkill driver success loaded\n");
+ return 0;
+
+error_rfkill:
+ rfkill_destroy(rfk);
+error_rfk_alloc:
+error_check_func:
+ return rc;
+}
+
+static int __devexit mxc_bt_rfkill_remove(struct platform_device *dev)
+{
+ struct imx_bt_rfkill_platform_data *data = dev->dev.platform_data;
+ struct rfkill *rfk = platform_get_drvdata(dev);
+
+ platform_set_drvdata(dev, NULL);
+
+ if (rfk) {
+ rfkill_unregister(rfk);
+ rfkill_destroy(rfk);
+ }
+
+ data->power_change(0);
+
+ return 0;
+}
+
+static struct platform_driver mxc_bt_rfkill_driver = {
+ .driver = {
+ .name = "mxc_bt_rfkill",
+ },
+ .probe = mxc_bt_rfkill_probe,
+ .remove = __devexit_p(mxc_bt_rfkill_remove),
+};
+
+static int __init mxc_bt_rfkill_init(void)
+{
+ return platform_driver_register(&mxc_bt_rfkill_driver);
+}
+
+module_init(mxc_bt_rfkill_init);
+
+static void __exit mxc_bt_rfkill_exit(void)
+{
+ platform_driver_unregister(&mxc_bt_rfkill_driver);
+}
+
+module_exit(mxc_bt_rfkill_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("RFKill control interface of BT on MX6 Platform");
projects / karo-tx-linux.git / commitdiff