drivers/media/dvb-frontends/cxd2880/cxd2880_integ.c

   1 /*
   2  * cxd2880_integ.c
   3  * Sony CXD2880 DVB-T2/T tuner + demodulator driver
   4  * integration layer common functions
   5  *
   6  * Copyright (C) 2016, 2017 Sony Semiconductor Solutions Corporation
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; version 2 of the License.
  11  *
  12  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  13  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
  15  * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  16  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  17  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  18  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  19  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  20  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  21  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  22  *
  23  * You should have received a copy of the GNU General Public License along
  24  * with this program; if not, see <http://www.gnu.org/licenses/>.
  25  */
  26
  27 #include "cxd2880_tnrdmd.h"
  28 #include "cxd2880_tnrdmd_mon.h"
  29 #include "cxd2880_integ.h"
  30
  31 enum cxd2880_ret cxd2880_integ_init(struct cxd2880_tnrdmd *tnr_dmd)
  32 {
  33         enum cxd2880_ret ret = CXD2880_RESULT_OK;
  34         struct cxd2880_stopwatch timer;
  35         u32 elapsed_time = 0;
  36         u8 cpu_task_completed = 0;
  37
  38         if (!tnr_dmd)
  39                 return CXD2880_RESULT_ERROR_ARG;
  40
  41         ret = cxd2880_tnrdmd_init1(tnr_dmd);
  42         if (ret != CXD2880_RESULT_OK)
  43                 return ret;
  44
  45         ret = cxd2880_stopwatch_start(&timer);
  46         if (ret != CXD2880_RESULT_OK)
  47                 return ret;
  48
  49         while (1) {
  50                 ret = cxd2880_stopwatch_elapsed(&timer, &elapsed_time);
  51                 if (ret != CXD2880_RESULT_OK)
  52                         return ret;
  53
  54                 ret =
  55                     cxd2880_tnrdmd_check_internal_cpu_status(tnr_dmd,
  56                                                      &cpu_task_completed);
  57                 if (ret != CXD2880_RESULT_OK)
  58                         return ret;
  59
  60                 if (cpu_task_completed)
  61                         break;
  62
  63                 if (elapsed_time > CXD2880_TNRDMD_WAIT_INIT_TIMEOUT)
  64                         return CXD2880_RESULT_ERROR_TIMEOUT;
  65                 ret =
  66                     cxd2880_stopwatch_sleep(&timer,
  67                                             CXD2880_TNRDMD_WAIT_INIT_INTVL);
  68                 if (ret != CXD2880_RESULT_OK)
  69                         return ret;
  70         }
  71
  72         ret = cxd2880_tnrdmd_init2(tnr_dmd);
  73         if (ret != CXD2880_RESULT_OK)
  74                 return ret;
  75
  76         return CXD2880_RESULT_OK;
  77 }
  78
  79 enum cxd2880_ret cxd2880_integ_cancel(struct cxd2880_tnrdmd *tnr_dmd)
  80 {
  81         if (!tnr_dmd)
  82                 return CXD2880_RESULT_ERROR_ARG;
  83
  84         cxd2880_atomic_set(&tnr_dmd->cancel, 1);
  85
  86         return CXD2880_RESULT_OK;
  87 }
  88
  89 enum cxd2880_ret cxd2880_integ_check_cancellation(struct cxd2880_tnrdmd
  90                                                   *tnr_dmd)
  91 {
  92         if (!tnr_dmd)
  93                 return CXD2880_RESULT_ERROR_ARG;
  94
  95         if (cxd2880_atomic_read(&tnr_dmd->cancel) != 0)
  96                 return CXD2880_RESULT_ERROR_CANCEL;
  97
  98         return CXD2880_RESULT_OK;
  99 }