diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/radio/radio-si470x.c | 97 |
1 files changed, 95 insertions, 2 deletions
diff --git a/drivers/media/radio/radio-si470x.c b/drivers/media/radio/radio-si470x.c index db9d64a228bb..dc93a882b385 100644 --- a/drivers/media/radio/radio-si470x.c +++ b/drivers/media/radio/radio-si470x.c @@ -101,11 +101,11 @@ * - unplugging fixed * 2008-05-07 Tobias Lorenz <tobias.lorenz@gmx.net> * Version 1.0.8 + * - hardware frequency seek support * - afc indication * - more safety checks, let si470x_get_freq return errno * * ToDo: - * - add seeking support * - add firmware download/update support * - RDS support: interrupt mode, instead of polling * - add LED status output (check if that's not already done in firmware) @@ -192,6 +192,11 @@ static unsigned int tune_timeout = 3000; module_param(tune_timeout, uint, 0); MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*"); +/* Seek timeout */ +static unsigned int seek_timeout = 5000; +module_param(seek_timeout, uint, 0); +MODULE_PARM_DESC(seek_timeout, "Seek timeout: *5000*"); + /* RDS buffer blocks */ static unsigned int rds_buf = 100; module_param(rds_buf, uint, 0); @@ -727,6 +732,62 @@ static int si470x_set_freq(struct si470x_device *radio, unsigned int freq) /* + * si470x_set_seek - set seek + */ +static int si470x_set_seek(struct si470x_device *radio, + unsigned int wrap_around, unsigned int seek_upward) +{ + int retval = 0; + unsigned long timeout; + bool timed_out = 0; + + /* start seeking */ + radio->registers[POWERCFG] |= POWERCFG_SEEK; + if (wrap_around == 1) + radio->registers[POWERCFG] &= ~POWERCFG_SKMODE; + else + radio->registers[POWERCFG] |= POWERCFG_SKMODE; + if (seek_upward == 1) + radio->registers[POWERCFG] |= POWERCFG_SEEKUP; + else + radio->registers[POWERCFG] &= ~POWERCFG_SEEKUP; + retval = si470x_set_register(radio, POWERCFG); + if (retval < 0) + goto done; + + /* wait till seek operation has completed */ + timeout = jiffies + msecs_to_jiffies(seek_timeout); + do { + retval = si470x_get_register(radio, STATUSRSSI); + if (retval < 0) + goto stop; + timed_out = time_after(jiffies, timeout); + } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) && + (!timed_out)); + if ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) + printk(KERN_WARNING DRIVER_NAME ": seek does not complete\n"); + if (radio->registers[STATUSRSSI] & STATUSRSSI_SF) + printk(KERN_WARNING DRIVER_NAME + ": seek failed / band limit reached\n"); + if (timed_out) + printk(KERN_WARNING DRIVER_NAME + ": seek timed out after %u ms\n", seek_timeout); + +stop: + /* stop seeking */ + radio->registers[POWERCFG] &= ~POWERCFG_SEEK; + retval = si470x_set_register(radio, POWERCFG); + +done: + /* try again, if timed out */ + if ((retval == 0) && timed_out) + retval = -EAGAIN; + + return retval; +} + + +/* * si470x_start - switch on radio */ static int si470x_start(struct si470x_device *radio) @@ -1148,7 +1209,8 @@ static int si470x_vidioc_querycap(struct file *file, void *priv, strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card)); sprintf(capability->bus_info, "USB"); capability->version = DRIVER_KERNEL_VERSION; - capability->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; + capability->capabilities = V4L2_CAP_HW_FREQ_SEEK | + V4L2_CAP_TUNER | V4L2_CAP_RADIO; return 0; } @@ -1495,6 +1557,36 @@ done: /* + * si470x_vidioc_s_hw_freq_seek - set hardware frequency seek + */ +static int si470x_vidioc_s_hw_freq_seek(struct file *file, void *priv, + struct v4l2_hw_freq_seek *seek) +{ + struct si470x_device *radio = video_get_drvdata(video_devdata(file)); + int retval = 0; + + /* safety checks */ + if (radio->disconnected) { + retval = -EIO; + goto done; + } + if ((seek->tuner != 0) && (seek->type != V4L2_TUNER_RADIO)) { + retval = -EINVAL; + goto done; + } + + retval = si470x_set_seek(radio, seek->wrap_around, seek->seek_upward); + +done: + if (retval < 0) + printk(KERN_WARNING DRIVER_NAME + ": set hardware frequency seek failed with %d\n", + retval); + return retval; +} + + +/* * si470x_viddev_tamples - video device interface */ static struct video_device si470x_viddev_template = { @@ -1514,6 +1606,7 @@ static struct video_device si470x_viddev_template = { .vidioc_s_tuner = si470x_vidioc_s_tuner, .vidioc_g_frequency = si470x_vidioc_g_frequency, .vidioc_s_frequency = si470x_vidioc_s_frequency, + .vidioc_s_hw_freq_seek = si470x_vidioc_s_hw_freq_seek, .owner = THIS_MODULE, }; |