From: Krzysztof Helt Date: Fri, 27 Nov 2009 10:24:13 +0000 (+0100) Subject: media/radio: New driver for the radio FM module on Miro PCM20 sound card X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8366fc390865bfb1497fe19a518fe5713f96ba3b;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git media/radio: New driver for the radio FM module on Miro PCM20 sound card This is recreated driver for the FM module found on Miro PCM20 sound cards. This driver was removed around the 2.6.2x kernels because it relied on the removed OSS module. Now, it uses a current ALSA module (snd-miro) and is adapted to v4l2 layer. It provides only basic functionality: frequency changing and FM module muting. Signed-off-by: Krzysztof Helt Reviewed-by: Hans Verkuil Acked-by: Mauro Carvalho Chehab Signed-off-by: Takashi Iwai --- diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig index a87a477c87f..b134553eb3b 100644 --- a/drivers/media/radio/Kconfig +++ b/drivers/media/radio/Kconfig @@ -195,6 +195,24 @@ config RADIO_MAESTRO To compile this driver as a module, choose M here: the module will be called radio-maestro. +config RADIO_MIROPCM20 + tristate "miroSOUND PCM20 radio" + depends on ISA && VIDEO_V4L2 + select SND_MIRO + ---help--- + Choose Y here if you have this FM radio card. You also need to enable + the ALSA sound system. This choice automatically selects the ALSA + sound card driver "Miro miroSOUND PCM1pro/PCM12/PCM20radio" as this + is required for the radio-miropcm20. + + In order to control your radio card, you will need to use programs + that are compatible with the Video For Linux API. Information on + this API and pointers to "v4l" programs may be found at + . + + To compile this driver as a module, choose M here: the + module will be called radio-miropcm20. + config RADIO_SF16FMI tristate "SF16FMI Radio" depends on ISA && VIDEO_V4L2 diff --git a/drivers/media/radio/Makefile b/drivers/media/radio/Makefile index 2a1be3bf4f7..8a63d543ae4 100644 --- a/drivers/media/radio/Makefile +++ b/drivers/media/radio/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_RADIO_TRUST) += radio-trust.o obj-$(CONFIG_I2C_SI4713) += si4713-i2c.o obj-$(CONFIG_RADIO_SI4713) += radio-si4713.o obj-$(CONFIG_RADIO_MAESTRO) += radio-maestro.o +obj-$(CONFIG_RADIO_MIROPCM20) += radio-miropcm20.o obj-$(CONFIG_USB_DSBR) += dsbr100.o obj-$(CONFIG_RADIO_SI470X) += si470x/ obj-$(CONFIG_USB_MR800) += radio-mr800.o diff --git a/drivers/media/radio/radio-miropcm20.c b/drivers/media/radio/radio-miropcm20.c new file mode 100644 index 00000000000..4ff885445fd --- /dev/null +++ b/drivers/media/radio/radio-miropcm20.c @@ -0,0 +1,270 @@ +/* Miro PCM20 radio driver for Linux radio support + * (c) 1998 Ruurd Reitsma + * Thanks to Norberto Pellici for the ACI device interface specification + * The API part is based on the radiotrack driver by M. Kirkwood + * This driver relies on the aci mixer provided by the snd-miro + * ALSA driver. + * Look there for further info... + */ + +/* What ever you think about the ACI, version 0x07 is not very well! + * I can't get frequency, 'tuner status', 'tuner flags' or mute/mono + * conditions... Robert + */ + +#include +#include +#include +#include +#include +#include + +static int radio_nr = -1; +module_param(radio_nr, int, 0); +MODULE_PARM_DESC(radio_nr, "Set radio device number (/dev/radioX). Default: -1 (autodetect)"); + +static int mono; +module_param(mono, bool, 0); +MODULE_PARM_DESC(mono, "Force tuner into mono mode."); + +struct pcm20 { + struct v4l2_device v4l2_dev; + struct video_device vdev; + unsigned long freq; + int muted; + struct snd_miro_aci *aci; +}; + +static struct pcm20 pcm20_card = { + .freq = 87*16000, + .muted = 1, +}; + +static int pcm20_mute(struct pcm20 *dev, unsigned char mute) +{ + dev->muted = mute; + return snd_aci_cmd(dev->aci, ACI_SET_TUNERMUTE, mute, -1); +} + +static int pcm20_stereo(struct pcm20 *dev, unsigned char stereo) +{ + return snd_aci_cmd(dev->aci, ACI_SET_TUNERMONO, !stereo, -1); +} + +static int pcm20_setfreq(struct pcm20 *dev, unsigned long freq) +{ + unsigned char freql; + unsigned char freqh; + struct snd_miro_aci *aci = dev->aci; + + dev->freq = freq; + + freq /= 160; + if (!(aci->aci_version == 0x07 || aci->aci_version >= 0xb0)) + freq /= 10; /* I don't know exactly which version + * needs this hack */ + freql = freq & 0xff; + freqh = freq >> 8; + + pcm20_stereo(dev, !mono); + return snd_aci_cmd(aci, ACI_WRITE_TUNE, freql, freqh); +} + +static const struct v4l2_file_operations pcm20_fops = { + .owner = THIS_MODULE, + .ioctl = video_ioctl2, +}; + +static int vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *v) +{ + strlcpy(v->driver, "Miro PCM20", sizeof(v->driver)); + strlcpy(v->card, "Miro PCM20", sizeof(v->card)); + strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); + v->version = 0x1; + v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; + return 0; +} + +static int vidioc_g_tuner(struct file *file, void *priv, + struct v4l2_tuner *v) +{ + if (v->index) /* Only 1 tuner */ + return -EINVAL; + strlcpy(v->name, "FM", sizeof(v->name)); + v->type = V4L2_TUNER_RADIO; + v->rangelow = 87*16000; + v->rangehigh = 108*16000; + v->signal = 0xffff; + v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; + v->capability = V4L2_TUNER_CAP_LOW; + v->audmode = V4L2_TUNER_MODE_MONO; + return 0; +} + +static int vidioc_s_tuner(struct file *file, void *priv, + struct v4l2_tuner *v) +{ + return v->index ? -EINVAL : 0; +} + +static int vidioc_g_frequency(struct file *file, void *priv, + struct v4l2_frequency *f) +{ + struct pcm20 *dev = video_drvdata(file); + + if (f->tuner != 0) + return -EINVAL; + + f->type = V4L2_TUNER_RADIO; + f->frequency = dev->freq; + return 0; +} + + +static int vidioc_s_frequency(struct file *file, void *priv, + struct v4l2_frequency *f) +{ + struct pcm20 *dev = video_drvdata(file); + + if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) + return -EINVAL; + + dev->freq = f->frequency; + pcm20_setfreq(dev, f->frequency); + return 0; +} + +static int vidioc_queryctrl(struct file *file, void *priv, + struct v4l2_queryctrl *qc) +{ + switch (qc->id) { + case V4L2_CID_AUDIO_MUTE: + return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); + } + return -EINVAL; +} + +static int vidioc_g_ctrl(struct file *file, void *priv, + struct v4l2_control *ctrl) +{ + struct pcm20 *dev = video_drvdata(file); + + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: + ctrl->value = dev->muted; + break; + default: + return -EINVAL; + } + return 0; +} + +static int vidioc_s_ctrl(struct file *file, void *priv, + struct v4l2_control *ctrl) +{ + struct pcm20 *dev = video_drvdata(file); + + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: + pcm20_mute(dev, ctrl->value); + break; + default: + return -EINVAL; + } + return 0; +} + +static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) +{ + *i = 0; + return 0; +} + +static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) +{ + return i ? -EINVAL : 0; +} + +static int vidioc_g_audio(struct file *file, void *priv, + struct v4l2_audio *a) +{ + a->index = 0; + strlcpy(a->name, "Radio", sizeof(a->name)); + a->capability = V4L2_AUDCAP_STEREO; + return 0; +} + +static int vidioc_s_audio(struct file *file, void *priv, + struct v4l2_audio *a) +{ + return a->index ? -EINVAL : 0; +} + +static const struct v4l2_ioctl_ops pcm20_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_queryctrl = vidioc_queryctrl, + .vidioc_g_ctrl = vidioc_g_ctrl, + .vidioc_s_ctrl = vidioc_s_ctrl, + .vidioc_g_audio = vidioc_g_audio, + .vidioc_s_audio = vidioc_s_audio, + .vidioc_g_input = vidioc_g_input, + .vidioc_s_input = vidioc_s_input, +}; + +static int __init pcm20_init(void) +{ + struct pcm20 *dev = &pcm20_card; + struct v4l2_device *v4l2_dev = &dev->v4l2_dev; + int res; + + dev->aci = snd_aci_get_aci(); + if (dev->aci == NULL) { + v4l2_err(v4l2_dev, + "you must load the snd-miro driver first!\n"); + return -ENODEV; + } + strlcpy(v4l2_dev->name, "miropcm20", sizeof(v4l2_dev->name)); + + + res = v4l2_device_register(NULL, v4l2_dev); + if (res < 0) { + v4l2_err(v4l2_dev, "could not register v4l2_device\n"); + return -EINVAL; + } + + strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name)); + dev->vdev.v4l2_dev = v4l2_dev; + dev->vdev.fops = &pcm20_fops; + dev->vdev.ioctl_ops = &pcm20_ioctl_ops; + dev->vdev.release = video_device_release_empty; + video_set_drvdata(&dev->vdev, dev); + + if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) + goto fail; + + v4l2_info(v4l2_dev, "Mirosound PCM20 Radio tuner\n"); + return 0; +fail: + v4l2_device_unregister(v4l2_dev); + return -EINVAL; +} + +MODULE_AUTHOR("Ruurd Reitsma, Krzysztof Helt"); +MODULE_DESCRIPTION("A driver for the Miro PCM20 radio card."); +MODULE_LICENSE("GPL"); + +static void __exit pcm20_cleanup(void) +{ + struct pcm20 *dev = &pcm20_card; + + video_unregister_device(&dev->vdev); + v4l2_device_unregister(&dev->v4l2_dev); +} + +module_init(pcm20_init); +module_exit(pcm20_cleanup);