![Hans Verkuil](/assets/img/avatar_default.png)
rxsubchans was only set when stereo was detected, otherwise it was left to 0 instead of setting it to mono. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
638 lines
16 KiB
C
638 lines
16 KiB
C
/*
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* driver/media/radio/radio-tea5764.c
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*
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* Driver for TEA5764 radio chip for linux 2.6.
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* This driver is for TEA5764 chip from NXP, used in EZX phones from Motorola.
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* The I2C protocol is used for communicate with chip.
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*
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* Based in radio-tea5761.c Copyright (C) 2005 Nokia Corporation
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*
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* Copyright (c) 2008 Fabio Belavenuto <belavenuto@gmail.com>
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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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* History:
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* 2008-12-06 Fabio Belavenuto <belavenuto@gmail.com>
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* initial code
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*
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* TODO:
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* add platform_data support for IRQs platform dependencies
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* add RDS support
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h> /* Initdata */
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#include <linux/videodev2.h> /* kernel radio structs */
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#include <linux/i2c.h> /* I2C */
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#include <media/v4l2-common.h>
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#include <media/v4l2-ioctl.h>
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#include <linux/version.h> /* for KERNEL_VERSION MACRO */
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#define DRIVER_VERSION "v0.01"
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#define RADIO_VERSION KERNEL_VERSION(0, 0, 1)
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#define DRIVER_AUTHOR "Fabio Belavenuto <belavenuto@gmail.com>"
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#define DRIVER_DESC "A driver for the TEA5764 radio chip for EZX Phones."
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#define PINFO(format, ...)\
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printk(KERN_INFO KBUILD_MODNAME ": "\
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DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
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#define PWARN(format, ...)\
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printk(KERN_WARNING KBUILD_MODNAME ": "\
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DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
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# define PDEBUG(format, ...)\
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printk(KERN_DEBUG KBUILD_MODNAME ": "\
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DRIVER_VERSION ": " format "\n", ## __VA_ARGS__)
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/* Frequency limits in MHz -- these are European values. For Japanese
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devices, that would be 76000 and 91000. */
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#define FREQ_MIN 87500
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#define FREQ_MAX 108000
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#define FREQ_MUL 16
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/* TEA5764 registers */
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#define TEA5764_MANID 0x002b
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#define TEA5764_CHIPID 0x5764
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#define TEA5764_INTREG_BLMSK 0x0001
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#define TEA5764_INTREG_FRRMSK 0x0002
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#define TEA5764_INTREG_LEVMSK 0x0008
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#define TEA5764_INTREG_IFMSK 0x0010
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#define TEA5764_INTREG_BLMFLAG 0x0100
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#define TEA5764_INTREG_FRRFLAG 0x0200
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#define TEA5764_INTREG_LEVFLAG 0x0800
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#define TEA5764_INTREG_IFFLAG 0x1000
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#define TEA5764_FRQSET_SUD 0x8000
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#define TEA5764_FRQSET_SM 0x4000
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#define TEA5764_TNCTRL_PUPD1 0x8000
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#define TEA5764_TNCTRL_PUPD0 0x4000
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#define TEA5764_TNCTRL_BLIM 0x2000
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#define TEA5764_TNCTRL_SWPM 0x1000
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#define TEA5764_TNCTRL_IFCTC 0x0800
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#define TEA5764_TNCTRL_AFM 0x0400
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#define TEA5764_TNCTRL_SMUTE 0x0200
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#define TEA5764_TNCTRL_SNC 0x0100
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#define TEA5764_TNCTRL_MU 0x0080
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#define TEA5764_TNCTRL_SSL1 0x0040
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#define TEA5764_TNCTRL_SSL0 0x0020
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#define TEA5764_TNCTRL_HLSI 0x0010
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#define TEA5764_TNCTRL_MST 0x0008
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#define TEA5764_TNCTRL_SWP 0x0004
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#define TEA5764_TNCTRL_DTC 0x0002
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#define TEA5764_TNCTRL_AHLSI 0x0001
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#define TEA5764_TUNCHK_LEVEL(x) (((x) & 0x00F0) >> 4)
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#define TEA5764_TUNCHK_IFCNT(x) (((x) & 0xFE00) >> 9)
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#define TEA5764_TUNCHK_TUNTO 0x0100
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#define TEA5764_TUNCHK_LD 0x0008
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#define TEA5764_TUNCHK_STEREO 0x0004
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#define TEA5764_TESTREG_TRIGFR 0x0800
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struct tea5764_regs {
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u16 intreg; /* INTFLAG & INTMSK */
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u16 frqset; /* FRQSETMSB & FRQSETLSB */
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u16 tnctrl; /* TNCTRL1 & TNCTRL2 */
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u16 frqchk; /* FRQCHKMSB & FRQCHKLSB */
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u16 tunchk; /* IFCHK & LEVCHK */
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u16 testreg; /* TESTBITS & TESTMODE */
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u16 rdsstat; /* RDSSTAT1 & RDSSTAT2 */
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u16 rdslb; /* RDSLBMSB & RDSLBLSB */
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u16 rdspb; /* RDSPBMSB & RDSPBLSB */
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u16 rdsbc; /* RDSBBC & RDSGBC */
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u16 rdsctrl; /* RDSCTRL1 & RDSCTRL2 */
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u16 rdsbbl; /* PAUSEDET & RDSBBL */
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u16 manid; /* MANID1 & MANID2 */
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u16 chipid; /* CHIPID1 & CHIPID2 */
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} __attribute__ ((packed));
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struct tea5764_write_regs {
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u8 intreg; /* INTMSK */
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u16 frqset; /* FRQSETMSB & FRQSETLSB */
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u16 tnctrl; /* TNCTRL1 & TNCTRL2 */
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u16 testreg; /* TESTBITS & TESTMODE */
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u16 rdsctrl; /* RDSCTRL1 & RDSCTRL2 */
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u16 rdsbbl; /* PAUSEDET & RDSBBL */
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} __attribute__ ((packed));
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#ifndef RADIO_TEA5764_XTAL
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#define RADIO_TEA5764_XTAL 1
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#endif
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static int radio_nr = -1;
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static int use_xtal = RADIO_TEA5764_XTAL;
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struct tea5764_device {
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struct i2c_client *i2c_client;
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struct video_device *videodev;
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struct tea5764_regs regs;
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struct mutex mutex;
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int users;
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};
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/* I2C code related */
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int tea5764_i2c_read(struct tea5764_device *radio)
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{
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int i;
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u16 *p = (u16 *) &radio->regs;
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struct i2c_msg msgs[1] = {
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{ radio->i2c_client->addr, I2C_M_RD, sizeof(radio->regs),
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(void *)&radio->regs },
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};
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if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1)
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return -EIO;
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for (i = 0; i < sizeof(struct tea5764_regs) / sizeof(u16); i++)
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p[i] = __be16_to_cpu(p[i]);
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return 0;
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}
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int tea5764_i2c_write(struct tea5764_device *radio)
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{
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struct tea5764_write_regs wr;
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struct tea5764_regs *r = &radio->regs;
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struct i2c_msg msgs[1] = {
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{ radio->i2c_client->addr, 0, sizeof(wr), (void *) &wr },
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};
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wr.intreg = r->intreg & 0xff;
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wr.frqset = __cpu_to_be16(r->frqset);
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wr.tnctrl = __cpu_to_be16(r->tnctrl);
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wr.testreg = __cpu_to_be16(r->testreg);
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wr.rdsctrl = __cpu_to_be16(r->rdsctrl);
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wr.rdsbbl = __cpu_to_be16(r->rdsbbl);
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if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1)
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return -EIO;
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return 0;
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}
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/* V4L2 code related */
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static struct v4l2_queryctrl radio_qctrl[] = {
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{
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.id = V4L2_CID_AUDIO_MUTE,
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.name = "Mute",
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.minimum = 0,
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.maximum = 1,
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.default_value = 1,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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}
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};
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static void tea5764_power_up(struct tea5764_device *radio)
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{
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struct tea5764_regs *r = &radio->regs;
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if (!(r->tnctrl & TEA5764_TNCTRL_PUPD0)) {
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r->tnctrl &= ~(TEA5764_TNCTRL_AFM | TEA5764_TNCTRL_MU |
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TEA5764_TNCTRL_HLSI);
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if (!use_xtal)
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r->testreg |= TEA5764_TESTREG_TRIGFR;
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else
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r->testreg &= ~TEA5764_TESTREG_TRIGFR;
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r->tnctrl |= TEA5764_TNCTRL_PUPD0;
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tea5764_i2c_write(radio);
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}
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}
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static void tea5764_power_down(struct tea5764_device *radio)
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{
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struct tea5764_regs *r = &radio->regs;
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if (r->tnctrl & TEA5764_TNCTRL_PUPD0) {
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r->tnctrl &= ~TEA5764_TNCTRL_PUPD0;
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tea5764_i2c_write(radio);
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}
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}
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static void tea5764_set_freq(struct tea5764_device *radio, int freq)
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{
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struct tea5764_regs *r = &radio->regs;
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/* formula: (freq [+ or -] 225000) / 8192 */
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if (r->tnctrl & TEA5764_TNCTRL_HLSI)
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r->frqset = (freq + 225000) / 8192;
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else
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r->frqset = (freq - 225000) / 8192;
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}
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static int tea5764_get_freq(struct tea5764_device *radio)
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{
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struct tea5764_regs *r = &radio->regs;
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if (r->tnctrl & TEA5764_TNCTRL_HLSI)
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return (r->frqchk * 8192) - 225000;
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else
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return (r->frqchk * 8192) + 225000;
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}
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/* tune an frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
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static void tea5764_tune(struct tea5764_device *radio, int freq)
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{
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tea5764_set_freq(radio, freq);
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if (tea5764_i2c_write(radio))
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PWARN("Could not set frequency!");
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}
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static void tea5764_set_audout_mode(struct tea5764_device *radio, int audmode)
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{
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struct tea5764_regs *r = &radio->regs;
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int tnctrl = r->tnctrl;
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if (audmode == V4L2_TUNER_MODE_MONO)
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r->tnctrl |= TEA5764_TNCTRL_MST;
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else
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r->tnctrl &= ~TEA5764_TNCTRL_MST;
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if (tnctrl != r->tnctrl)
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tea5764_i2c_write(radio);
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}
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static int tea5764_get_audout_mode(struct tea5764_device *radio)
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{
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struct tea5764_regs *r = &radio->regs;
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if (r->tnctrl & TEA5764_TNCTRL_MST)
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return V4L2_TUNER_MODE_MONO;
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else
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return V4L2_TUNER_MODE_STEREO;
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}
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static void tea5764_mute(struct tea5764_device *radio, int on)
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{
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struct tea5764_regs *r = &radio->regs;
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int tnctrl = r->tnctrl;
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if (on)
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r->tnctrl |= TEA5764_TNCTRL_MU;
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else
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r->tnctrl &= ~TEA5764_TNCTRL_MU;
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if (tnctrl != r->tnctrl)
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tea5764_i2c_write(radio);
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}
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static int tea5764_is_muted(struct tea5764_device *radio)
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{
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return radio->regs.tnctrl & TEA5764_TNCTRL_MU;
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}
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/* V4L2 vidioc */
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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 tea5764_device *radio = video_drvdata(file);
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struct video_device *dev = radio->videodev;
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strlcpy(v->driver, dev->dev.driver->name, sizeof(v->driver));
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strlcpy(v->card, dev->name, sizeof(v->card));
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snprintf(v->bus_info, sizeof(v->bus_info),
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"I2C:%s", dev_name(&dev->dev));
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v->version = RADIO_VERSION;
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v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
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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 tea5764_device *radio = video_drvdata(file);
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struct tea5764_regs *r = &radio->regs;
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if (v->index > 0)
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return -EINVAL;
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memset(v, 0, sizeof(v));
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strcpy(v->name, "FM");
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v->type = V4L2_TUNER_RADIO;
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tea5764_i2c_read(radio);
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v->rangelow = FREQ_MIN * FREQ_MUL;
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v->rangehigh = FREQ_MAX * FREQ_MUL;
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v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
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if (r->tunchk & TEA5764_TUNCHK_STEREO)
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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 = tea5764_get_audout_mode(radio);
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v->signal = TEA5764_TUNCHK_LEVEL(r->tunchk) * 0xffff / 0xf;
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v->afc = TEA5764_TUNCHK_IFCNT(r->tunchk);
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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 tea5764_device *radio = video_drvdata(file);
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if (v->index > 0)
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return -EINVAL;
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tea5764_set_audout_mode(radio, v->audmode);
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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 tea5764_device *radio = video_drvdata(file);
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if (f->tuner != 0)
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return -EINVAL;
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if (f->frequency == 0) {
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/* We special case this as a power down control. */
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tea5764_power_down(radio);
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}
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if (f->frequency < (FREQ_MIN * FREQ_MUL))
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return -EINVAL;
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if (f->frequency > (FREQ_MAX * FREQ_MUL))
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return -EINVAL;
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tea5764_power_up(radio);
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tea5764_tune(radio, (f->frequency * 125) / 2);
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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 tea5764_device *radio = video_drvdata(file);
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struct tea5764_regs *r = &radio->regs;
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tea5764_i2c_read(radio);
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memset(f, 0, sizeof(f));
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f->type = V4L2_TUNER_RADIO;
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if (r->tnctrl & TEA5764_TNCTRL_PUPD0)
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f->frequency = (tea5764_get_freq(radio) * 2) / 125;
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else
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f->frequency = 0;
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return 0;
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}
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static int vidioc_queryctrl(struct file *file, void *priv,
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struct v4l2_queryctrl *qc)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
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if (qc->id && qc->id == radio_qctrl[i].id) {
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memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
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return 0;
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}
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}
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return -EINVAL;
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}
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static int vidioc_g_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct tea5764_device *radio = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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tea5764_i2c_read(radio);
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ctrl->value = tea5764_is_muted(radio) ? 1 : 0;
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return 0;
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}
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return -EINVAL;
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}
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static int vidioc_s_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct tea5764_device *radio = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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tea5764_mute(radio, ctrl->value);
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return 0;
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}
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return -EINVAL;
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}
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static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
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{
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*i = 0;
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return 0;
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}
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static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
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{
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if (i != 0)
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return -EINVAL;
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return 0;
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}
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static int vidioc_g_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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if (a->index > 1)
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return -EINVAL;
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strcpy(a->name, "Radio");
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a->capability = V4L2_AUDCAP_STEREO;
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return 0;
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}
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static int vidioc_s_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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if (a->index != 0)
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return -EINVAL;
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return 0;
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}
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static int tea5764_open(struct file *file)
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{
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/* Currently we support only one device */
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int minor = video_devdata(file)->minor;
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struct tea5764_device *radio = video_drvdata(file);
|
|
|
|
if (radio->videodev->minor != minor)
|
|
return -ENODEV;
|
|
|
|
mutex_lock(&radio->mutex);
|
|
/* Only exclusive access */
|
|
if (radio->users) {
|
|
mutex_unlock(&radio->mutex);
|
|
return -EBUSY;
|
|
}
|
|
radio->users++;
|
|
mutex_unlock(&radio->mutex);
|
|
file->private_data = radio;
|
|
return 0;
|
|
}
|
|
|
|
static int tea5764_close(struct file *file)
|
|
{
|
|
struct tea5764_device *radio = video_drvdata(file);
|
|
|
|
if (!radio)
|
|
return -ENODEV;
|
|
mutex_lock(&radio->mutex);
|
|
radio->users--;
|
|
mutex_unlock(&radio->mutex);
|
|
return 0;
|
|
}
|
|
|
|
/* File system interface */
|
|
static const struct v4l2_file_operations tea5764_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = tea5764_open,
|
|
.release = tea5764_close,
|
|
.ioctl = video_ioctl2,
|
|
};
|
|
|
|
static const struct v4l2_ioctl_ops tea5764_ioctl_ops = {
|
|
.vidioc_querycap = vidioc_querycap,
|
|
.vidioc_g_tuner = vidioc_g_tuner,
|
|
.vidioc_s_tuner = vidioc_s_tuner,
|
|
.vidioc_g_audio = vidioc_g_audio,
|
|
.vidioc_s_audio = vidioc_s_audio,
|
|
.vidioc_g_input = vidioc_g_input,
|
|
.vidioc_s_input = vidioc_s_input,
|
|
.vidioc_g_frequency = vidioc_g_frequency,
|
|
.vidioc_s_frequency = vidioc_s_frequency,
|
|
.vidioc_queryctrl = vidioc_queryctrl,
|
|
.vidioc_g_ctrl = vidioc_g_ctrl,
|
|
.vidioc_s_ctrl = vidioc_s_ctrl,
|
|
};
|
|
|
|
/* V4L2 interface */
|
|
static struct video_device tea5764_radio_template = {
|
|
.name = "TEA5764 FM-Radio",
|
|
.fops = &tea5764_fops,
|
|
.ioctl_ops = &tea5764_ioctl_ops,
|
|
.release = video_device_release,
|
|
};
|
|
|
|
/* I2C probe: check if the device exists and register with v4l if it is */
|
|
static int __devinit tea5764_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct tea5764_device *radio;
|
|
struct tea5764_regs *r;
|
|
int ret;
|
|
|
|
PDEBUG("probe");
|
|
radio = kmalloc(sizeof(struct tea5764_device), GFP_KERNEL);
|
|
if (!radio)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&radio->mutex);
|
|
radio->i2c_client = client;
|
|
ret = tea5764_i2c_read(radio);
|
|
if (ret)
|
|
goto errfr;
|
|
r = &radio->regs;
|
|
PDEBUG("chipid = %04X, manid = %04X", r->chipid, r->manid);
|
|
if (r->chipid != TEA5764_CHIPID ||
|
|
(r->manid & 0x0fff) != TEA5764_MANID) {
|
|
PWARN("This chip is not a TEA5764!");
|
|
ret = -EINVAL;
|
|
goto errfr;
|
|
}
|
|
|
|
radio->videodev = video_device_alloc();
|
|
if (!(radio->videodev)) {
|
|
ret = -ENOMEM;
|
|
goto errfr;
|
|
}
|
|
memcpy(radio->videodev, &tea5764_radio_template,
|
|
sizeof(tea5764_radio_template));
|
|
|
|
i2c_set_clientdata(client, radio);
|
|
video_set_drvdata(radio->videodev, radio);
|
|
|
|
ret = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr);
|
|
if (ret < 0) {
|
|
PWARN("Could not register video device!");
|
|
goto errrel;
|
|
}
|
|
|
|
/* initialize and power off the chip */
|
|
tea5764_i2c_read(radio);
|
|
tea5764_set_audout_mode(radio, V4L2_TUNER_MODE_STEREO);
|
|
tea5764_mute(radio, 1);
|
|
tea5764_power_down(radio);
|
|
|
|
PINFO("registered.");
|
|
return 0;
|
|
errrel:
|
|
video_device_release(radio->videodev);
|
|
errfr:
|
|
kfree(radio);
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit tea5764_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct tea5764_device *radio = i2c_get_clientdata(client);
|
|
|
|
PDEBUG("remove");
|
|
if (radio) {
|
|
tea5764_power_down(radio);
|
|
video_unregister_device(radio->videodev);
|
|
kfree(radio);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* I2C subsystem interface */
|
|
static const struct i2c_device_id tea5764_id[] = {
|
|
{ "radio-tea5764", 0 },
|
|
{ } /* Terminating entry */
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tea5764_id);
|
|
|
|
static struct i2c_driver tea5764_i2c_driver = {
|
|
.driver = {
|
|
.name = "radio-tea5764",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = tea5764_i2c_probe,
|
|
.remove = __devexit_p(tea5764_i2c_remove),
|
|
.id_table = tea5764_id,
|
|
};
|
|
|
|
/* init the driver */
|
|
static int __init tea5764_init(void)
|
|
{
|
|
int ret = i2c_add_driver(&tea5764_i2c_driver);
|
|
|
|
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ": "
|
|
DRIVER_DESC "\n");
|
|
return ret;
|
|
}
|
|
|
|
/* cleanup the driver */
|
|
static void __exit tea5764_exit(void)
|
|
{
|
|
i2c_del_driver(&tea5764_i2c_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(use_xtal, int, 1);
|
|
MODULE_PARM_DESC(use_xtal, "Chip have a xtal connected in board");
|
|
module_param(radio_nr, int, 0);
|
|
MODULE_PARM_DESC(radio_nr, "video4linux device number to use");
|
|
|
|
module_init(tea5764_init);
|
|
module_exit(tea5764_exit);
|