![Hans de Goede](/assets/img/avatar_default.png)
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
600 lines
16 KiB
C
600 lines
16 KiB
C
/*
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* v4l2 driver for TEA5777 Philips AM/FM radio tuner chips
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*
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* Copyright (c) 2012 Hans de Goede <hdegoede@redhat.com>
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*
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* Based on the ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips:
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*
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* Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-dev.h>
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#include <media/v4l2-fh.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-event.h>
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#include "radio-tea5777.h"
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MODULE_AUTHOR("Hans de Goede <perex@perex.cz>");
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MODULE_DESCRIPTION("Routines for control of TEA5777 Philips AM/FM radio tuner chips");
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MODULE_LICENSE("GPL");
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#define TEA5777_FM_IF 150 /* kHz */
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#define TEA5777_FM_FREQ_STEP 50 /* kHz */
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#define TEA5777_AM_IF 21 /* kHz */
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#define TEA5777_AM_FREQ_STEP 1 /* kHz */
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/* Write reg, common bits */
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#define TEA5777_W_MUTE_MASK (1LL << 47)
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#define TEA5777_W_MUTE_SHIFT 47
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#define TEA5777_W_AM_FM_MASK (1LL << 46)
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#define TEA5777_W_AM_FM_SHIFT 46
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#define TEA5777_W_STB_MASK (1LL << 45)
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#define TEA5777_W_STB_SHIFT 45
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#define TEA5777_W_IFCE_MASK (1LL << 29)
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#define TEA5777_W_IFCE_SHIFT 29
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#define TEA5777_W_IFW_MASK (1LL << 28)
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#define TEA5777_W_IFW_SHIFT 28
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#define TEA5777_W_HILO_MASK (1LL << 27)
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#define TEA5777_W_HILO_SHIFT 27
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#define TEA5777_W_DBUS_MASK (1LL << 26)
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#define TEA5777_W_DBUS_SHIFT 26
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#define TEA5777_W_INTEXT_MASK (1LL << 24)
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#define TEA5777_W_INTEXT_SHIFT 24
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#define TEA5777_W_P1_MASK (1LL << 23)
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#define TEA5777_W_P1_SHIFT 23
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#define TEA5777_W_P0_MASK (1LL << 22)
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#define TEA5777_W_P0_SHIFT 22
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#define TEA5777_W_PEN1_MASK (1LL << 21)
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#define TEA5777_W_PEN1_SHIFT 21
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#define TEA5777_W_PEN0_MASK (1LL << 20)
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#define TEA5777_W_PEN0_SHIFT 20
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#define TEA5777_W_CHP0_MASK (1LL << 18)
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#define TEA5777_W_CHP0_SHIFT 18
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#define TEA5777_W_DEEM_MASK (1LL << 17)
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#define TEA5777_W_DEEM_SHIFT 17
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#define TEA5777_W_SEARCH_MASK (1LL << 7)
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#define TEA5777_W_SEARCH_SHIFT 7
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#define TEA5777_W_PROGBLIM_MASK (1LL << 6)
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#define TEA5777_W_PROGBLIM_SHIFT 6
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#define TEA5777_W_UPDWN_MASK (1LL << 5)
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#define TEA5777_W_UPDWN_SHIFT 5
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#define TEA5777_W_SLEV_MASK (3LL << 3)
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#define TEA5777_W_SLEV_SHIFT 3
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/* Write reg, FM specific bits */
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#define TEA5777_W_FM_PLL_MASK (0x1fffLL << 32)
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#define TEA5777_W_FM_PLL_SHIFT 32
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#define TEA5777_W_FM_FREF_MASK (0x03LL << 30)
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#define TEA5777_W_FM_FREF_SHIFT 30
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#define TEA5777_W_FM_FREF_VALUE 0LL /* 50k steps, 150k IF */
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#define TEA5777_W_FM_FORCEMONO_MASK (1LL << 15)
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#define TEA5777_W_FM_FORCEMONO_SHIFT 15
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#define TEA5777_W_FM_SDSOFF_MASK (1LL << 14)
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#define TEA5777_W_FM_SDSOFF_SHIFT 14
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#define TEA5777_W_FM_DOFF_MASK (1LL << 13)
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#define TEA5777_W_FM_DOFF_SHIFT 13
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#define TEA5777_W_FM_STEP_MASK (3LL << 1)
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#define TEA5777_W_FM_STEP_SHIFT 1
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/* Write reg, AM specific bits */
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#define TEA5777_W_AM_PLL_MASK (0x7ffLL << 34)
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#define TEA5777_W_AM_PLL_SHIFT 34
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#define TEA5777_W_AM_AGCRF_MASK (1LL << 33)
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#define TEA5777_W_AM_AGCRF_SHIFT 33
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#define TEA5777_W_AM_AGCIF_MASK (1LL << 32)
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#define TEA5777_W_AM_AGCIF_SHIFT 32
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#define TEA5777_W_AM_MWLW_MASK (1LL << 31)
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#define TEA5777_W_AM_MWLW_SHIFT 31
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#define TEA5777_W_AM_LW 0LL
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#define TEA5777_W_AM_MW 1LL
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#define TEA5777_W_AM_LNA_MASK (1LL << 30)
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#define TEA5777_W_AM_LNA_SHIFT 30
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#define TEA5777_W_AM_PEAK_MASK (1LL << 25)
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#define TEA5777_W_AM_PEAK_SHIFT 25
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#define TEA5777_W_AM_RFB_MASK (1LL << 16)
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#define TEA5777_W_AM_RFB_SHIFT 16
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#define TEA5777_W_AM_CALLIGN_MASK (1LL << 15)
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#define TEA5777_W_AM_CALLIGN_SHIFT 15
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#define TEA5777_W_AM_CBANK_MASK (0x7fLL << 8)
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#define TEA5777_W_AM_CBANK_SHIFT 8
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#define TEA5777_W_AM_DELAY_MASK (1LL << 2)
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#define TEA5777_W_AM_DELAY_SHIFT 2
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#define TEA5777_W_AM_STEP_MASK (1LL << 1)
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#define TEA5777_W_AM_STEP_SHIFT 1
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/* Read reg, common bits */
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#define TEA5777_R_LEVEL_MASK (0x0f << 17)
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#define TEA5777_R_LEVEL_SHIFT 17
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#define TEA5777_R_SFOUND_MASK (0x01 << 16)
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#define TEA5777_R_SFOUND_SHIFT 16
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#define TEA5777_R_BLIM_MASK (0x01 << 15)
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#define TEA5777_R_BLIM_SHIFT 15
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/* Read reg, FM specific bits */
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#define TEA5777_R_FM_STEREO_MASK (0x01 << 21)
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#define TEA5777_R_FM_STEREO_SHIFT 21
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#define TEA5777_R_FM_PLL_MASK 0x1fff
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#define TEA5777_R_FM_PLL_SHIFT 0
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enum { BAND_FM, BAND_AM };
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static const struct v4l2_frequency_band bands[] = {
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{
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.type = V4L2_TUNER_RADIO,
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.index = 0,
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.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
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V4L2_TUNER_CAP_FREQ_BANDS |
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V4L2_TUNER_CAP_HWSEEK_BOUNDED |
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V4L2_TUNER_CAP_HWSEEK_PROG_LIM,
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.rangelow = 76000 * 16,
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.rangehigh = 108000 * 16,
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.modulation = V4L2_BAND_MODULATION_FM,
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},
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{
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.type = V4L2_TUNER_RADIO,
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.index = 1,
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.capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_FREQ_BANDS |
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V4L2_TUNER_CAP_HWSEEK_BOUNDED |
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V4L2_TUNER_CAP_HWSEEK_PROG_LIM,
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.rangelow = 530 * 16,
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.rangehigh = 1710 * 16,
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.modulation = V4L2_BAND_MODULATION_AM,
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},
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};
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static u32 tea5777_freq_to_v4l2_freq(struct radio_tea5777 *tea, u32 freq)
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{
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switch (tea->band) {
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case BAND_FM:
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return (freq * TEA5777_FM_FREQ_STEP + TEA5777_FM_IF) * 16;
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case BAND_AM:
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return (freq * TEA5777_AM_FREQ_STEP + TEA5777_AM_IF) * 16;
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}
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return 0; /* Never reached */
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}
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int radio_tea5777_set_freq(struct radio_tea5777 *tea)
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{
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u32 freq;
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int res;
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freq = clamp(tea->freq, bands[tea->band].rangelow,
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bands[tea->band].rangehigh);
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freq = (freq + 8) / 16; /* to kHz */
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switch (tea->band) {
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case BAND_FM:
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tea->write_reg &= ~TEA5777_W_AM_FM_MASK;
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freq = (freq - TEA5777_FM_IF) / TEA5777_FM_FREQ_STEP;
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tea->write_reg &= ~TEA5777_W_FM_PLL_MASK;
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tea->write_reg |= (u64)freq << TEA5777_W_FM_PLL_SHIFT;
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tea->write_reg &= ~TEA5777_W_FM_FREF_MASK;
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tea->write_reg |= TEA5777_W_FM_FREF_VALUE <<
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TEA5777_W_FM_FREF_SHIFT;
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tea->write_reg &= ~TEA5777_W_FM_FORCEMONO_MASK;
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if (tea->audmode == V4L2_TUNER_MODE_MONO)
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tea->write_reg |= 1LL << TEA5777_W_FM_FORCEMONO_SHIFT;
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break;
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case BAND_AM:
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tea->write_reg &= ~TEA5777_W_AM_FM_MASK;
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tea->write_reg |= (1LL << TEA5777_W_AM_FM_SHIFT);
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freq = (freq - TEA5777_AM_IF) / TEA5777_AM_FREQ_STEP;
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tea->write_reg &= ~TEA5777_W_AM_PLL_MASK;
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tea->write_reg |= (u64)freq << TEA5777_W_AM_PLL_SHIFT;
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tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;
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tea->write_reg &= ~TEA5777_W_AM_AGCRF_MASK;
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tea->write_reg &= ~TEA5777_W_AM_MWLW_MASK;
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tea->write_reg |= TEA5777_W_AM_MW << TEA5777_W_AM_MWLW_SHIFT;
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tea->write_reg &= ~TEA5777_W_AM_LNA_MASK;
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tea->write_reg |= 1LL << TEA5777_W_AM_LNA_SHIFT;
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tea->write_reg &= ~TEA5777_W_AM_PEAK_MASK;
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tea->write_reg |= 1LL << TEA5777_W_AM_PEAK_SHIFT;
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tea->write_reg &= ~TEA5777_W_AM_CALLIGN_MASK;
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break;
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}
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res = tea->ops->write_reg(tea, tea->write_reg);
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if (res)
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return res;
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tea->needs_write = false;
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tea->read_reg = -1;
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tea->freq = tea5777_freq_to_v4l2_freq(tea, freq);
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return 0;
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}
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static int radio_tea5777_update_read_reg(struct radio_tea5777 *tea, int wait)
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{
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int res;
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if (tea->read_reg != -1)
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return 0;
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if (tea->write_before_read && tea->needs_write) {
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res = radio_tea5777_set_freq(tea);
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if (res)
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return res;
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}
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if (wait) {
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if (schedule_timeout_interruptible(msecs_to_jiffies(wait)))
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return -ERESTARTSYS;
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}
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res = tea->ops->read_reg(tea, &tea->read_reg);
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if (res)
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return res;
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tea->needs_write = true;
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return 0;
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}
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/*
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* Linux Video interface
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*/
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static int vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *v)
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{
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struct radio_tea5777 *tea = video_drvdata(file);
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strlcpy(v->driver, tea->v4l2_dev->name, sizeof(v->driver));
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strlcpy(v->card, tea->card, sizeof(v->card));
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strlcat(v->card, " TEA5777", sizeof(v->card));
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strlcpy(v->bus_info, tea->bus_info, sizeof(v->bus_info));
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v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
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v->device_caps |= V4L2_CAP_HW_FREQ_SEEK;
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v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
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return 0;
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}
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static int vidioc_enum_freq_bands(struct file *file, void *priv,
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struct v4l2_frequency_band *band)
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{
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struct radio_tea5777 *tea = video_drvdata(file);
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if (band->tuner != 0 || band->index >= ARRAY_SIZE(bands) ||
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(!tea->has_am && band->index == BAND_AM))
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return -EINVAL;
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*band = bands[band->index];
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return 0;
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}
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static int vidioc_g_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct radio_tea5777 *tea = video_drvdata(file);
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int res;
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if (v->index > 0)
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return -EINVAL;
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res = radio_tea5777_update_read_reg(tea, 0);
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if (res)
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return res;
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memset(v, 0, sizeof(*v));
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if (tea->has_am)
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strlcpy(v->name, "AM/FM", sizeof(v->name));
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else
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strlcpy(v->name, "FM", sizeof(v->name));
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v->type = V4L2_TUNER_RADIO;
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v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO |
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V4L2_TUNER_CAP_FREQ_BANDS |
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V4L2_TUNER_CAP_HWSEEK_BOUNDED |
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V4L2_TUNER_CAP_HWSEEK_PROG_LIM;
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v->rangelow = tea->has_am ? bands[BAND_AM].rangelow :
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bands[BAND_FM].rangelow;
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v->rangehigh = bands[BAND_FM].rangehigh;
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if (tea->band == BAND_FM &&
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(tea->read_reg & TEA5777_R_FM_STEREO_MASK))
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v->rxsubchans = V4L2_TUNER_SUB_STEREO;
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else
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v->rxsubchans = V4L2_TUNER_SUB_MONO;
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v->audmode = tea->audmode;
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/* shift - 12 to convert 4-bits (0-15) scale to 16-bits (0-65535) */
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v->signal = (tea->read_reg & TEA5777_R_LEVEL_MASK) >>
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(TEA5777_R_LEVEL_SHIFT - 12);
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/* Invalidate read_reg, so that next call we return up2date signal */
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tea->read_reg = -1;
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return 0;
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}
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static int vidioc_s_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct radio_tea5777 *tea = video_drvdata(file);
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u32 orig_audmode = tea->audmode;
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if (v->index)
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return -EINVAL;
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if (v->audmode > V4L2_TUNER_MODE_STEREO)
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v->audmode = V4L2_TUNER_MODE_STEREO;
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tea->audmode = v->audmode;
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if (tea->audmode != orig_audmode && tea->band == BAND_FM)
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return radio_tea5777_set_freq(tea);
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return 0;
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}
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static int vidioc_g_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct radio_tea5777 *tea = video_drvdata(file);
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if (f->tuner != 0)
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return -EINVAL;
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f->type = V4L2_TUNER_RADIO;
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f->frequency = tea->freq;
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return 0;
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}
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static int vidioc_s_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct radio_tea5777 *tea = video_drvdata(file);
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if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
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return -EINVAL;
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if (tea->has_am && f->frequency < (20000 * 16))
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tea->band = BAND_AM;
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else
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tea->band = BAND_FM;
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tea->freq = f->frequency;
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return radio_tea5777_set_freq(tea);
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}
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static int vidioc_s_hw_freq_seek(struct file *file, void *fh,
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struct v4l2_hw_freq_seek *a)
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{
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struct radio_tea5777 *tea = video_drvdata(file);
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unsigned long timeout;
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int i, res, spacing;
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u32 orig_freq;
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if (a->tuner || a->wrap_around)
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return -EINVAL;
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if (a->rangelow || a->rangehigh) {
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for (i = 0; i < ARRAY_SIZE(bands); i++) {
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if (i == BAND_AM && !tea->has_am)
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continue;
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if (bands[i].rangelow >= a->rangelow &&
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bands[i].rangehigh <= a->rangehigh)
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break;
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}
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if (i == ARRAY_SIZE(bands))
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return -EINVAL; /* No matching band found */
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tea->band = i;
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if (tea->freq < a->rangelow || tea->freq > a->rangehigh) {
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tea->freq = clamp(tea->freq, a->rangelow,
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a->rangehigh);
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res = radio_tea5777_set_freq(tea);
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if (res)
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return res;
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}
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} else {
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a->rangelow = bands[tea->band].rangelow;
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a->rangehigh = bands[tea->band].rangehigh;
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}
|
|
|
|
spacing = (tea->band == BAND_AM) ? (5 * 16) : (200 * 16); /* kHz */
|
|
orig_freq = tea->freq;
|
|
|
|
tea->write_reg |= TEA5777_W_PROGBLIM_MASK;
|
|
if (tea->seek_rangelow != a->rangelow) {
|
|
tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
|
|
tea->freq = a->rangelow;
|
|
res = radio_tea5777_set_freq(tea);
|
|
if (res)
|
|
goto leave;
|
|
tea->seek_rangelow = a->rangelow;
|
|
}
|
|
if (tea->seek_rangehigh != a->rangehigh) {
|
|
tea->write_reg |= TEA5777_W_UPDWN_MASK;
|
|
tea->freq = a->rangehigh;
|
|
res = radio_tea5777_set_freq(tea);
|
|
if (res)
|
|
goto leave;
|
|
tea->seek_rangehigh = a->rangehigh;
|
|
}
|
|
tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
|
|
|
|
tea->write_reg |= TEA5777_W_SEARCH_MASK;
|
|
if (a->seek_upward) {
|
|
tea->write_reg |= TEA5777_W_UPDWN_MASK;
|
|
tea->freq = orig_freq + spacing;
|
|
} else {
|
|
tea->write_reg &= ~TEA5777_W_UPDWN_MASK;
|
|
tea->freq = orig_freq - spacing;
|
|
}
|
|
res = radio_tea5777_set_freq(tea);
|
|
if (res)
|
|
goto leave;
|
|
|
|
timeout = jiffies + msecs_to_jiffies(5000);
|
|
for (;;) {
|
|
if (time_after(jiffies, timeout)) {
|
|
res = -ENODATA;
|
|
break;
|
|
}
|
|
|
|
res = radio_tea5777_update_read_reg(tea, 100);
|
|
if (res)
|
|
break;
|
|
|
|
/*
|
|
* Note we use tea->freq to track how far we've searched sofar
|
|
* this is necessary to ensure we continue seeking at the right
|
|
* point, in the write_before_read case.
|
|
*/
|
|
tea->freq = (tea->read_reg & TEA5777_R_FM_PLL_MASK);
|
|
tea->freq = tea5777_freq_to_v4l2_freq(tea, tea->freq);
|
|
|
|
if ((tea->read_reg & TEA5777_R_SFOUND_MASK)) {
|
|
tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
|
|
return 0;
|
|
}
|
|
|
|
if (tea->read_reg & TEA5777_R_BLIM_MASK) {
|
|
res = -ENODATA;
|
|
break;
|
|
}
|
|
|
|
/* Force read_reg update */
|
|
tea->read_reg = -1;
|
|
}
|
|
leave:
|
|
tea->write_reg &= ~TEA5777_W_PROGBLIM_MASK;
|
|
tea->write_reg &= ~TEA5777_W_SEARCH_MASK;
|
|
tea->freq = orig_freq;
|
|
radio_tea5777_set_freq(tea);
|
|
return res;
|
|
}
|
|
|
|
static int tea575x_s_ctrl(struct v4l2_ctrl *c)
|
|
{
|
|
struct radio_tea5777 *tea =
|
|
container_of(c->handler, struct radio_tea5777, ctrl_handler);
|
|
|
|
switch (c->id) {
|
|
case V4L2_CID_AUDIO_MUTE:
|
|
if (c->val)
|
|
tea->write_reg |= TEA5777_W_MUTE_MASK;
|
|
else
|
|
tea->write_reg &= ~TEA5777_W_MUTE_MASK;
|
|
|
|
return radio_tea5777_set_freq(tea);
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const struct v4l2_file_operations tea575x_fops = {
|
|
.unlocked_ioctl = video_ioctl2,
|
|
.open = v4l2_fh_open,
|
|
.release = v4l2_fh_release,
|
|
.poll = v4l2_ctrl_poll,
|
|
};
|
|
|
|
static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
|
|
.vidioc_querycap = vidioc_querycap,
|
|
.vidioc_g_tuner = vidioc_g_tuner,
|
|
.vidioc_s_tuner = vidioc_s_tuner,
|
|
.vidioc_g_frequency = vidioc_g_frequency,
|
|
.vidioc_s_frequency = vidioc_s_frequency,
|
|
.vidioc_s_hw_freq_seek = vidioc_s_hw_freq_seek,
|
|
.vidioc_enum_freq_bands = vidioc_enum_freq_bands,
|
|
.vidioc_log_status = v4l2_ctrl_log_status,
|
|
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
|
|
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
|
|
};
|
|
|
|
static const struct video_device tea575x_radio = {
|
|
.ioctl_ops = &tea575x_ioctl_ops,
|
|
.release = video_device_release_empty,
|
|
};
|
|
|
|
static const struct v4l2_ctrl_ops tea575x_ctrl_ops = {
|
|
.s_ctrl = tea575x_s_ctrl,
|
|
};
|
|
|
|
int radio_tea5777_init(struct radio_tea5777 *tea, struct module *owner)
|
|
{
|
|
int res;
|
|
|
|
tea->write_reg = (1LL << TEA5777_W_IFCE_SHIFT) |
|
|
(1LL << TEA5777_W_IFW_SHIFT) |
|
|
(1LL << TEA5777_W_INTEXT_SHIFT) |
|
|
(1LL << TEA5777_W_CHP0_SHIFT) |
|
|
(1LL << TEA5777_W_SLEV_SHIFT);
|
|
tea->freq = 90500 * 16; /* 90.5Mhz default */
|
|
tea->audmode = V4L2_TUNER_MODE_STEREO;
|
|
res = radio_tea5777_set_freq(tea);
|
|
if (res) {
|
|
v4l2_err(tea->v4l2_dev, "can't set initial freq (%d)\n", res);
|
|
return res;
|
|
}
|
|
|
|
tea->vd = tea575x_radio;
|
|
video_set_drvdata(&tea->vd, tea);
|
|
mutex_init(&tea->mutex);
|
|
strlcpy(tea->vd.name, tea->v4l2_dev->name, sizeof(tea->vd.name));
|
|
tea->vd.lock = &tea->mutex;
|
|
tea->vd.v4l2_dev = tea->v4l2_dev;
|
|
tea->fops = tea575x_fops;
|
|
tea->fops.owner = owner;
|
|
tea->vd.fops = &tea->fops;
|
|
set_bit(V4L2_FL_USE_FH_PRIO, &tea->vd.flags);
|
|
|
|
tea->vd.ctrl_handler = &tea->ctrl_handler;
|
|
v4l2_ctrl_handler_init(&tea->ctrl_handler, 1);
|
|
v4l2_ctrl_new_std(&tea->ctrl_handler, &tea575x_ctrl_ops,
|
|
V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
|
|
res = tea->ctrl_handler.error;
|
|
if (res) {
|
|
v4l2_err(tea->v4l2_dev, "can't initialize controls\n");
|
|
v4l2_ctrl_handler_free(&tea->ctrl_handler);
|
|
return res;
|
|
}
|
|
v4l2_ctrl_handler_setup(&tea->ctrl_handler);
|
|
|
|
res = video_register_device(&tea->vd, VFL_TYPE_RADIO, -1);
|
|
if (res) {
|
|
v4l2_err(tea->v4l2_dev, "can't register video device!\n");
|
|
v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
|
|
return res;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(radio_tea5777_init);
|
|
|
|
void radio_tea5777_exit(struct radio_tea5777 *tea)
|
|
{
|
|
video_unregister_device(&tea->vd);
|
|
v4l2_ctrl_handler_free(tea->vd.ctrl_handler);
|
|
}
|
|
EXPORT_SYMBOL_GPL(radio_tea5777_exit);
|