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)17int 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)53int 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)63int 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