1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * cxd2880_integ.c
4  * Sony CXD2880 DVB-T2/T tuner + demodulator driver
5  * integration layer common functions
6  *
7  * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation
8  */
9 
10 #include <linux/ktime.h>
11 #include <linux/errno.h>
12 
13 #include "cxd2880_tnrdmd.h"
14 #include "cxd2880_tnrdmd_mon.h"
15 #include "cxd2880_integ.h"
16 
cxd2880_integ_init(struct cxd2880_tnrdmd * tnr_dmd)17 int cxd2880_integ_init(struct cxd2880_tnrdmd *tnr_dmd)
18 {
19 	int ret;
20 	ktime_t start;
21 	u8 cpu_task_completed = 0;
22 
23 	if (!tnr_dmd)
24 		return -EINVAL;
25 
26 	ret = cxd2880_tnrdmd_init1(tnr_dmd);
27 	if (ret)
28 		return ret;
29 
30 	start = ktime_get();
31 
32 	while (1) {
33 		ret =
34 		    cxd2880_tnrdmd_check_internal_cpu_status(tnr_dmd,
35 						     &cpu_task_completed);
36 		if (ret)
37 			return ret;
38 
39 		if (cpu_task_completed)
40 			break;
41 
42 		if (ktime_to_ms(ktime_sub(ktime_get(), start)) >
43 					CXD2880_TNRDMD_WAIT_INIT_TIMEOUT)
44 			return -ETIMEDOUT;
45 
46 		usleep_range(CXD2880_TNRDMD_WAIT_INIT_INTVL,
47 			     CXD2880_TNRDMD_WAIT_INIT_INTVL + 1000);
48 	}
49 
50 	return cxd2880_tnrdmd_init2(tnr_dmd);
51 }
52 
cxd2880_integ_cancel(struct cxd2880_tnrdmd * tnr_dmd)53 int cxd2880_integ_cancel(struct cxd2880_tnrdmd *tnr_dmd)
54 {
55 	if (!tnr_dmd)
56 		return -EINVAL;
57 
58 	atomic_set(&tnr_dmd->cancel, 1);
59 
60 	return 0;
61 }
62 
cxd2880_integ_check_cancellation(struct cxd2880_tnrdmd * tnr_dmd)63 int cxd2880_integ_check_cancellation(struct cxd2880_tnrdmd *tnr_dmd)
64 {
65 	if (!tnr_dmd)
66 		return -EINVAL;
67 
68 	if (atomic_read(&tnr_dmd->cancel) != 0)
69 		return -ECANCELED;
70 
71 	return 0;
72 }
73