From 4bd9ff19708ce8d88926121dda98423e36191c58 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Fri, 27 Apr 2012 18:39:37 -0300 Subject: [media] radio-mr800: add hardware seek support Added hardware seek support based on information gleaned from the GPLv2 driver available here: http://sourceforge.net/projects/av-usbradio/ Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/radio/radio-mr800.c | 255 +++++++++++++++++++++----------------- 1 file changed, 141 insertions(+), 114 deletions(-) (limited to 'drivers/media/radio/radio-mr800.c') diff --git a/drivers/media/radio/radio-mr800.c b/drivers/media/radio/radio-mr800.c index 0b39a8c..94cb6bc 100644 --- a/drivers/media/radio/radio-mr800.c +++ b/drivers/media/radio/radio-mr800.c @@ -103,13 +103,17 @@ devices, that would be 76 and 91. */ * List isn't full and will be updated with implementation of new functions */ #define AMRADIO_SET_FREQ 0xa4 +#define AMRADIO_GET_READY_FLAG 0xa5 #define AMRADIO_GET_SIGNAL 0xa7 +#define AMRADIO_GET_FREQ 0xa8 +#define AMRADIO_SET_SEARCH_UP 0xa9 +#define AMRADIO_SET_SEARCH_DOWN 0xaa #define AMRADIO_SET_MUTE 0xab +#define AMRADIO_SET_RIGHT_MUTE 0xac +#define AMRADIO_SET_LEFT_MUTE 0xad #define AMRADIO_SET_MONO 0xae - -/* Comfortable defines for amradio_set_mute */ -#define AMRADIO_START 0x00 -#define AMRADIO_STOP 0x01 +#define AMRADIO_SET_SEARCH_LVL 0xb0 +#define AMRADIO_STOP_SEARCH 0xb1 /* Comfortable defines for amradio_set_stereo */ #define WANT_STEREO 0x00 @@ -129,7 +133,7 @@ struct amradio_device { struct v4l2_device v4l2_dev; struct v4l2_ctrl_handler hdl; - unsigned char *buffer; + u8 *buffer; struct mutex lock; /* buffer locking */ int curfreq; int stereo; @@ -141,8 +145,8 @@ static inline struct amradio_device *to_amradio_dev(struct v4l2_device *v4l2_dev return container_of(v4l2_dev, struct amradio_device, v4l2_dev); } -/* switch on/off the radio. Send 8 bytes to device */ -static int amradio_set_mute(struct amradio_device *radio, char argument) +static int amradio_send_cmd(struct amradio_device *radio, u8 cmd, u8 arg, + u8 *extra, u8 extralen, bool reply) { int retval; int size; @@ -150,117 +154,89 @@ static int amradio_set_mute(struct amradio_device *radio, char argument) radio->buffer[0] = 0x00; radio->buffer[1] = 0x55; radio->buffer[2] = 0xaa; - radio->buffer[3] = 0x00; - radio->buffer[4] = AMRADIO_SET_MUTE; - radio->buffer[5] = argument; + radio->buffer[3] = extralen; + radio->buffer[4] = cmd; + radio->buffer[5] = arg; radio->buffer[6] = 0x00; - radio->buffer[7] = 0x00; + radio->buffer[7] = extra || reply ? 8 : 0; retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), - (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); + radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT); if (retval < 0 || size != BUFFER_LENGTH) { - amradio_dev_warn(&radio->vdev.dev, "set mute failed\n"); - return retval < 0 ? retval : -EIO; + if (video_is_registered(&radio->vdev)) + amradio_dev_warn(&radio->vdev.dev, + "cmd %02x failed\n", cmd); + return retval ? retval : -EIO; } - radio->muted = argument; - return 0; + if (!extra && !reply) + return 0; + + if (extra) { + memcpy(radio->buffer, extra, extralen); + memset(radio->buffer + extralen, 0, 8 - extralen); + retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), + radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT); + } else { + memset(radio->buffer, 0, 8); + retval = usb_bulk_msg(radio->usbdev, usb_rcvbulkpipe(radio->usbdev, 0x81), + radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT); + } + if (retval == 0 && size == BUFFER_LENGTH) + return 0; + if (video_is_registered(&radio->vdev) && cmd != AMRADIO_GET_READY_FLAG) + amradio_dev_warn(&radio->vdev.dev, "follow-up to cmd %02x failed\n", cmd); + return retval ? retval : -EIO; +} + +/* switch on/off the radio. Send 8 bytes to device */ +static int amradio_set_mute(struct amradio_device *radio, bool mute) +{ + int ret = amradio_send_cmd(radio, + AMRADIO_SET_MUTE, mute, NULL, 0, false); + + if (!ret) + radio->muted = mute; + return ret; } /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */ -static int amradio_setfreq(struct amradio_device *radio, int freq) +static int amradio_set_freq(struct amradio_device *radio, int freq) { unsigned short freq_send = 0x10 + (freq >> 3) / 25; + u8 buf[3]; int retval; - int size; - - radio->buffer[0] = 0x00; - radio->buffer[1] = 0x55; - radio->buffer[2] = 0xaa; - radio->buffer[3] = 0x03; - radio->buffer[4] = AMRADIO_SET_FREQ; - radio->buffer[5] = 0x00; - radio->buffer[6] = 0x00; - radio->buffer[7] = 0x08; - - retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), - (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); - - if (retval < 0 || size != BUFFER_LENGTH) - goto out; /* frequency is calculated from freq_send and placed in first 2 bytes */ - radio->buffer[0] = (freq_send >> 8) & 0xff; - radio->buffer[1] = freq_send & 0xff; - radio->buffer[2] = 0x01; - radio->buffer[3] = 0x00; - radio->buffer[4] = 0x00; - /* 5 and 6 bytes of buffer already = 0x00 */ - radio->buffer[7] = 0x00; - - retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), - (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); + buf[0] = (freq_send >> 8) & 0xff; + buf[1] = freq_send & 0xff; + buf[2] = 0x01; - if (retval >= 0 && size == BUFFER_LENGTH) { - radio->curfreq = freq; - return 0; - } - -out: - amradio_dev_warn(&radio->vdev.dev, "set frequency failed\n"); - return retval < 0 ? retval : -EIO; + retval = amradio_send_cmd(radio, AMRADIO_SET_FREQ, 0, buf, 3, false); + if (retval) + return retval; + radio->curfreq = freq; + msleep(40); + return 0; } -static int amradio_set_stereo(struct amradio_device *radio, char argument) +static int amradio_set_stereo(struct amradio_device *radio, bool stereo) { - int retval; - int size; - - radio->buffer[0] = 0x00; - radio->buffer[1] = 0x55; - radio->buffer[2] = 0xaa; - radio->buffer[3] = 0x00; - radio->buffer[4] = AMRADIO_SET_MONO; - radio->buffer[5] = argument; - radio->buffer[6] = 0x00; - radio->buffer[7] = 0x00; + int ret = amradio_send_cmd(radio, + AMRADIO_SET_MONO, !stereo, NULL, 0, false); - retval = usb_bulk_msg(radio->usbdev, usb_sndintpipe(radio->usbdev, 2), - (void *) (radio->buffer), BUFFER_LENGTH, &size, USB_TIMEOUT); - - if (retval < 0 || size != BUFFER_LENGTH) { - amradio_dev_warn(&radio->vdev.dev, "set stereo failed\n"); - return retval < 0 ? retval : -EIO; - } - - radio->stereo = (argument == WANT_STEREO); - return 0; + if (!ret) + radio->stereo = stereo; + return ret; } static int amradio_get_stat(struct amradio_device *radio, bool *is_stereo, u32 *signal) { - int retval; - int size; - - radio->buffer[0] = 0x00; - radio->buffer[1] = 0x55; - radio->buffer[2] = 0xaa; - radio->buffer[3] = 0x00; - radio->buffer[4] = AMRADIO_GET_SIGNAL; - radio->buffer[5] = 0x00; - radio->buffer[6] = 0x00; - radio->buffer[7] = 0x08; - - retval = usb_bulk_msg(radio->usbdev, usb_sndbulkpipe(radio->usbdev, 0x02), - radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT); - if (!retval) - retval = usb_bulk_msg(radio->usbdev, usb_rcvbulkpipe(radio->usbdev, 0x81), - radio->buffer, BUFFER_LENGTH, &size, USB_TIMEOUT); + int ret = amradio_send_cmd(radio, + AMRADIO_GET_SIGNAL, 0, NULL, 0, true); - if (retval || size != BUFFER_LENGTH) { - amradio_dev_warn(&radio->vdev.dev, "get stat failed\n"); - return retval; - } + if (ret) + return ret; *is_stereo = radio->buffer[2] >> 7; *signal = (radio->buffer[3] & 0xf0) << 8; return 0; @@ -276,8 +252,9 @@ static void usb_amradio_disconnect(struct usb_interface *intf) struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf)); mutex_lock(&radio->lock); - usb_set_intfdata(intf, NULL); video_unregister_device(&radio->vdev); + amradio_set_mute(radio, true); + usb_set_intfdata(intf, NULL); v4l2_device_disconnect(&radio->v4l2_dev); mutex_unlock(&radio->lock); v4l2_device_put(&radio->v4l2_dev); @@ -292,7 +269,8 @@ static int vidioc_querycap(struct file *file, void *priv, strlcpy(v->driver, "radio-mr800", sizeof(v->driver)); strlcpy(v->card, "AverMedia MR 800 USB FM Radio", sizeof(v->card)); usb_make_path(radio->usbdev, v->bus_info, sizeof(v->bus_info)); - v->device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER; + v->device_caps = V4L2_CAP_RADIO | V4L2_CAP_TUNER | + V4L2_CAP_HW_FREQ_SEEK; v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS; return 0; } @@ -350,7 +328,7 @@ static int vidioc_s_frequency(struct file *file, void *priv, if (f->tuner != 0) return -EINVAL; - return amradio_setfreq(radio, clamp_t(unsigned, f->frequency, + return amradio_set_freq(radio, clamp_t(unsigned, f->frequency, FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL)); } @@ -368,6 +346,59 @@ static int vidioc_g_frequency(struct file *file, void *priv, return 0; } +static int vidioc_s_hw_freq_seek(struct file *file, void *priv, + struct v4l2_hw_freq_seek *seek) +{ + static u8 buf[8] = { + 0x3d, 0x32, 0x0f, 0x08, 0x3d, 0x32, 0x0f, 0x08 + }; + struct amradio_device *radio = video_drvdata(file); + unsigned long timeout; + int retval; + + if (seek->tuner != 0 || !seek->wrap_around) + return -EINVAL; + + retval = amradio_send_cmd(radio, + AMRADIO_SET_SEARCH_LVL, 0, buf, 8, false); + if (retval) + return retval; + amradio_set_freq(radio, radio->curfreq); + retval = amradio_send_cmd(radio, + seek->seek_upward ? AMRADIO_SET_SEARCH_UP : AMRADIO_SET_SEARCH_DOWN, + 0, NULL, 0, false); + if (retval) + return retval; + timeout = jiffies + msecs_to_jiffies(30000); + for (;;) { + if (time_after(jiffies, timeout)) { + retval = -EAGAIN; + break; + } + if (schedule_timeout_interruptible(msecs_to_jiffies(10))) { + retval = -ERESTARTSYS; + break; + } + retval = amradio_send_cmd(radio, AMRADIO_GET_READY_FLAG, + 0, NULL, 0, true); + if (retval) + continue; + amradio_send_cmd(radio, AMRADIO_GET_FREQ, 0, NULL, 0, true); + if (radio->buffer[1] || radio->buffer[2]) { + radio->curfreq = (radio->buffer[1] << 8) | radio->buffer[2]; + radio->curfreq = (radio->curfreq - 0x10) * 200; + amradio_send_cmd(radio, AMRADIO_STOP_SEARCH, + 0, NULL, 0, false); + amradio_set_freq(radio, radio->curfreq); + retval = 0; + break; + } + } + amradio_send_cmd(radio, AMRADIO_STOP_SEARCH, 0, NULL, 0, false); + amradio_set_freq(radio, radio->curfreq); + return retval; +} + static int usb_amradio_s_ctrl(struct v4l2_ctrl *ctrl) { struct amradio_device *radio = @@ -375,8 +406,7 @@ static int usb_amradio_s_ctrl(struct v4l2_ctrl *ctrl) switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: - return amradio_set_mute(radio, - ctrl->val ? AMRADIO_STOP : AMRADIO_START); + return amradio_set_mute(radio, ctrl->val); } return -EINVAL; @@ -386,19 +416,19 @@ static int usb_amradio_init(struct amradio_device *radio) { int retval; - retval = amradio_set_mute(radio, AMRADIO_STOP); + retval = amradio_set_mute(radio, true); if (retval) goto out_err; - - retval = amradio_set_stereo(radio, WANT_STEREO); + retval = amradio_set_stereo(radio, true); if (retval) goto out_err; - - goto out; + retval = amradio_set_freq(radio, radio->curfreq); + if (retval) + goto out_err; + return 0; out_err: amradio_dev_err(&radio->vdev.dev, "initialization failed\n"); -out: return retval; } @@ -409,8 +439,8 @@ static int usb_amradio_suspend(struct usb_interface *intf, pm_message_t message) mutex_lock(&radio->lock); if (!radio->muted) { - amradio_set_mute(radio, AMRADIO_STOP); - radio->muted = 0; + amradio_set_mute(radio, true); + radio->muted = false; } mutex_unlock(&radio->lock); @@ -424,15 +454,11 @@ static int usb_amradio_resume(struct usb_interface *intf) struct amradio_device *radio = to_amradio_dev(usb_get_intfdata(intf)); mutex_lock(&radio->lock); - if (radio->stereo) - amradio_set_stereo(radio, WANT_STEREO); - else - amradio_set_stereo(radio, WANT_MONO); - - amradio_setfreq(radio, radio->curfreq); + amradio_set_stereo(radio, radio->stereo); + amradio_set_freq(radio, radio->curfreq); if (!radio->muted) - amradio_set_mute(radio, AMRADIO_START); + amradio_set_mute(radio, false); mutex_unlock(&radio->lock); @@ -459,6 +485,7 @@ static const struct v4l2_ioctl_ops usb_amradio_ioctl_ops = { .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_log_status = v4l2_ctrl_log_status, .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, .vidioc_unsubscribe_event = v4l2_event_unsubscribe, -- cgit v1.1