1 /* Copyright Statement:
3 * This software/firmware and related documentation ("MediaTek Software") are
4 * protected under relevant copyright laws. The information contained herein is
5 * confidential and proprietary to MediaTek Inc. and/or its licensors. Without
6 * the prior written permission of MediaTek inc. and/or its licensors, any
7 * reproduction, modification, use or disclosure of MediaTek Software, and
8 * information contained herein, in whole or in part, shall be strictly
11 * MediaTek Inc. (C) 2010. All rights reserved.
13 * BY OPENING THIS FILE, RECEIVER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
14 * THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
15 * RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO RECEIVER
16 * ON AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL
17 * WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
19 * NONINFRINGEMENT. NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH
20 * RESPECT TO THE SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY,
21 * INCORPORATED IN, OR SUPPLIED WITH THE MEDIATEK SOFTWARE, AND RECEIVER AGREES
22 * TO LOOK ONLY TO SUCH THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO.
23 * RECEIVER EXPRESSLY ACKNOWLEDGES THAT IT IS RECEIVER'S SOLE RESPONSIBILITY TO
24 * OBTAIN FROM ANY THIRD PARTY ALL PROPER LICENSES CONTAINED IN MEDIATEK
25 * SOFTWARE. MEDIATEK SHALL ALSO NOT BE RESPONSIBLE FOR ANY MEDIATEK SOFTWARE
26 * RELEASES MADE TO RECEIVER'S SPECIFICATION OR TO CONFORM TO A PARTICULAR
27 * STANDARD OR OPEN FORUM. RECEIVER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S
28 * ENTIRE AND CUMULATIVE LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE
29 * RELEASED HEREUNDER WILL BE, AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE
30 * MEDIATEK SOFTWARE AT ISSUE, OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE
31 * CHARGE PAID BY RECEIVER TO MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
33 * The following software/firmware and/or related documentation ("MediaTek
34 * Software") have been modified by MediaTek Inc. All revisions are subject to
35 * any receiver's applicable license agreements with MediaTek Inc.
38 #include <linux/kernel.h>
39 #include <linux/module.h>
40 #include <linux/init.h>
41 #include <linux/types.h>
42 #include <linux/wait.h>
43 #include <linux/slab.h>
45 #include <linux/sched.h>
46 #include <linux/poll.h>
47 #include <linux/device.h>
48 #include <linux/platform_device.h>
49 #include <linux/cdev.h>
50 #include <linux/errno.h>
52 #include <asm/uaccess.h>
53 #include <net/bluetooth/bluetooth.h>
54 #include <net/bluetooth/hci_core.h>
55 #include <linux/gpio.h>
56 #include <mach/gpio.h>
61 #define BT_HWCTL_DEBUG_EN 0
63 #define BT_HWCTL_ALERT(f, s...) \
64 printk(KERN_ALERT "BTHWCTL " f, ## s)
67 #define BT_HWCTL_DEBUG(f, s...) \
68 printk(KERN_INFO "BTHWCTL " f, ## s)
70 #define BT_HWCTL_DEBUG(f, s...) \
74 /**************************************************************************
75 * D E F I N I T I O N S *
76 ***************************************************************************/
78 #define BTHWCTL_NAME "bthwctl"
79 #define BTHWCTL_DEV_NAME "/dev/bthwctl"
80 #define BTHWCTL_IOC_MAGIC 0xf6
81 #define BTHWCTL_IOCTL_SET_POWER _IOWR(BTHWCTL_IOC_MAGIC, 0, uint32_t)
82 #define BTHWCTL_IOCTL_SET_EINT _IOWR(BTHWCTL_IOC_MAGIC, 1, uint32_t)
84 wait_queue_head_t eint_wait;
87 int eint_handle_method = 0; // 0: for 4.1; 1: for 4.2
88 struct wake_lock mt6622_irq_wakelock;
89 int mt6622_suspend_flag;
99 static struct bt_hwctl *bh = NULL;
101 static struct mt6622_platform_data *mt6622_pdata;
103 /*****************************************************************************
105 *****************************************************************************/
106 static int bt_hwctl_open(struct inode *inode, struct file *file)
108 BT_HWCTL_DEBUG("bt_hwctl_open\n");
114 /*****************************************************************************
116 *****************************************************************************/
117 static long bt_hwctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
121 BT_HWCTL_DEBUG("bt_hwctl_ioctl\n");
124 BT_HWCTL_ALERT("bt_hwctl struct not initialized\n");
130 case BTHWCTL_IOCTL_SET_POWER:
132 unsigned long pwr = 0;
133 if (copy_from_user(&pwr, (void*)arg, sizeof(unsigned long)))
136 BT_HWCTL_DEBUG("BTHWCTL_IOCTL_SET_POWER: %d\n", (int)pwr);
138 mutex_lock(&bh->sem);
140 ret = mt_bt_power_on();
145 mutex_unlock(&bh->sem);
149 case BTHWCTL_IOCTL_SET_EINT:
151 unsigned long eint = 0;
152 if (copy_from_user(&eint, (void*)arg, sizeof(unsigned long)))
155 BT_HWCTL_DEBUG("BTHWCTL_IOCTL_SET_EINT: %d\n", (int)eint);
157 mutex_lock(&bh->sem);
159 /* Enable irq from user space */
160 BT_HWCTL_DEBUG("Set BT EINT enable\n");
164 /* Disable irq from user space, maybe time to close driver */
165 BT_HWCTL_DEBUG("Set BT EINT disable\n");
168 wake_up_interruptible(&eint_wait);
170 mutex_unlock(&bh->sem);
175 BT_HWCTL_ALERT("BTHWCTL_IOCTL not support\n");
182 /*****************************************************************************
184 *****************************************************************************/
185 static int bt_hwctl_release(struct inode *inode, struct file *file)
187 BT_HWCTL_DEBUG("bt_hwctl_release\n");
193 /*****************************************************************************
195 *****************************************************************************/
196 static unsigned int bt_hwctl_poll(struct file *file, poll_table *wait)
200 eint_handle_method = 1;
202 BT_HWCTL_DEBUG("bt_hwctl_poll eint_gen %d, eint_mask %d ++\n", eint_gen, eint_mask);
203 //poll_wait(file, &eint_wait, wait);
204 wait_event_interruptible(eint_wait, (eint_gen == 1 || eint_mask == 1));
205 BT_HWCTL_DEBUG("bt_hwctl_poll eint_gen %d, eint_mask %d --\n", eint_gen, eint_mask);
207 if(mt6622_suspend_flag == 1) {
208 printk("mt6622 wake lock 5000ms\n");
209 mt6622_suspend_flag = 0;
210 wake_lock_timeout(&mt6622_irq_wakelock, msecs_to_jiffies(5000));
214 mask = POLLIN|POLLRDNORM;
217 else if (eint_mask == 1){
225 static void mtk_wcn_bt_work_fun(struct work_struct *work)
227 struct hci_dev *hdev = NULL;
229 /* BlueZ stack, hci_uart driver */
230 hdev = hci_dev_get(0);
232 /* Avoid the early interrupt before hci0 registered */
233 //printk(KERN_ALERT "hdev is NULL\n ");
235 //printk(KERN_ALERT "Send host wakeup command\n");
236 hci_send_cmd(hdev, 0xFCC1, 0, NULL);
242 static int mt6622_probe(struct platform_device *pdev)
244 struct mt6622_platform_data *pdata = pdev->dev.platform_data;
246 printk("mt6622_probe.\n");
248 mt6622_pdata = pdata;
250 printk("mt6622_probe failed.\n");
254 if(pdata->power_gpio.io != INVALID_GPIO) {
255 if (gpio_request(pdata->power_gpio.io, "BT_PWR_EN")){
256 printk("mt6622 power_gpio is busy!\n");
261 if(pdata->reset_gpio.io != INVALID_GPIO) {
262 if (gpio_request(pdata->reset_gpio.io, "BT_RESET")){
263 printk("mt6622 reset_gpio is busy!\n");
264 gpio_free(pdata->power_gpio.io);
269 if(pdata->irq_gpio.io != INVALID_GPIO) {
270 if (gpio_request(pdata->irq_gpio.io, "BT_EINT")){
271 printk("mt6622 irq_gpio is busy!\n");
272 gpio_free(pdata->power_gpio.io);
273 gpio_free(pdata->reset_gpio.io);
283 static int mt6622_remove(struct platform_device *pdev)
285 struct mt6622_platform_data *pdata = pdev->dev.platform_data;
287 printk("mt6622_remove.\n");
290 if(pdata->power_gpio.io != INVALID_GPIO)
291 gpio_free(pdata->power_gpio.io);
292 if(pdata->reset_gpio.io != INVALID_GPIO)
293 gpio_free(pdata->reset_gpio.io);
294 if(pdata->irq_gpio.io != INVALID_GPIO)
295 gpio_free(pdata->irq_gpio.io);
301 void *mt_bt_get_platform_data(void)
303 return (void *)mt6622_pdata;
306 /**************************************************************************
307 * K E R N E L I N T E R F A C E S *
308 ***************************************************************************/
309 static struct file_operations bt_hwctl_fops = {
310 .owner = THIS_MODULE,
311 // .ioctl = bt_hwctl_ioctl,
312 .unlocked_ioctl = bt_hwctl_ioctl,
313 .open = bt_hwctl_open,
314 .release = bt_hwctl_release,
315 .poll = bt_hwctl_poll,
318 static struct platform_driver mt6622_driver = {
319 .probe = mt6622_probe,
320 .remove = mt6622_remove,
321 .suspend = mt6622_suspend,
322 .resume = mt6622_resume,
325 .owner = THIS_MODULE,
329 /*****************************************************************************/
330 static int __init bt_hwctl_init(void)
332 int ret = -1, err = -1;
334 BT_HWCTL_DEBUG("bt_hwctl_init\n");
336 platform_driver_register(&mt6622_driver);
338 if (!(bh = kzalloc(sizeof(struct bt_hwctl), GFP_KERNEL)))
340 BT_HWCTL_ALERT("bt_hwctl_init allocate dev struct failed\n");
345 ret = alloc_chrdev_region(&bh->dev_t, 0, 1, BTHWCTL_NAME);
347 BT_HWCTL_ALERT("alloc chrdev region failed\n");
351 BT_HWCTL_DEBUG("alloc %s:%d:%d\n", BTHWCTL_NAME, MAJOR(bh->dev_t), MINOR(bh->dev_t));
353 cdev_init(&bh->cdev, &bt_hwctl_fops);
355 bh->cdev.owner = THIS_MODULE;
356 bh->cdev.ops = &bt_hwctl_fops;
358 err = cdev_add(&bh->cdev, bh->dev_t, 1);
360 BT_HWCTL_ALERT("add chrdev failed\n");
364 bh->cls = class_create(THIS_MODULE, BTHWCTL_NAME);
365 if (IS_ERR(bh->cls)) {
366 err = PTR_ERR(bh->cls);
367 BT_HWCTL_ALERT("class_create failed, errno:%d\n", err);
371 bh->dev = device_create(bh->cls, NULL, bh->dev_t, NULL, BTHWCTL_NAME);
372 mutex_init(&bh->sem);
374 init_waitqueue_head(&eint_wait);
376 wake_lock_init(&mt6622_irq_wakelock, WAKE_LOCK_SUSPEND, "mt6622_irq_wakelock");
378 /*INIT_WORK(&mtk_wcn_bt_event_work, mtk_wcn_bt_work_fun);
379 mtk_wcn_bt_workqueue = create_singlethread_workqueue("mtk_wcn_bt");
380 if (!mtk_wcn_bt_workqueue) {
381 printk("create_singlethread_workqueue failed.\n");
386 /* request gpio used by BT */
389 BT_HWCTL_DEBUG("bt_hwctl_init ok\n");
397 unregister_chrdev_region(bh->dev_t, 1);
406 /*****************************************************************************/
407 static void __exit bt_hwctl_exit(void)
409 BT_HWCTL_DEBUG("bt_hwctl_exit\n");
411 wake_lock_destroy(&mt6622_irq_wakelock);
413 platform_driver_unregister(&mt6622_driver);
418 unregister_chrdev_region(bh->dev_t, 1);
419 device_destroy(bh->cls, bh->dev_t);
421 class_destroy(bh->cls);
422 mutex_destroy(&bh->sem);
428 /* release gpio used by BT */
429 //mt_bt_gpio_release();
432 EXPORT_SYMBOL(mt_bt_get_platform_data);
433 EXPORT_SYMBOL(eint_wait);
434 EXPORT_SYMBOL(eint_gen);
435 //EXPORT_SYMBOL(mtk_wcn_bt_event_work);
436 //EXPORT_SYMBOL(mtk_wcn_bt_workqueue);
438 module_init(bt_hwctl_init);
439 module_exit(bt_hwctl_exit);
440 MODULE_AUTHOR("Tingting Lei <tingting.lei@mediatek.com>");
441 MODULE_DESCRIPTION("Bluetooth hardware control driver");
442 MODULE_LICENSE("GPL");