* - code cleaned of unnecessary rds_commands
* - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified
* (thanks to Guillaume RAMOUSSE)
+ * 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net>
+ * Version 1.0.5
+ * - number of seek_retries changed to tune_timeout
+ * - fixed problem with incomplete tune operations by own buffers
+ * - optimization of variables
+ * - improved error logging
*
* ToDo:
* - add seeking support
/* driver definitions */
#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
#define DRIVER_NAME "radio-si470x"
-#define DRIVER_VERSION KERNEL_VERSION(1, 0, 4)
+#define DRIVER_KERNEL_VERSION KERNEL_VERSION(1, 0, 5)
#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
#define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
+#define DRIVER_VERSION "1.0.5"
/* kernel includes */
/* 0: 200 kHz (USA, Australia) */
/* 1: 100 kHz (Europe, Japan) */
/* 2: 50 kHz */
-static int space = 2;
-module_param(space, int, 0);
+static unsigned short space = 2;
+module_param(space, ushort, 0);
MODULE_PARM_DESC(radio_nr, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
/* Bottom of Band (MHz) */
/* 0: 87.5 - 108 MHz (USA, Europe)*/
/* 1: 76 - 108 MHz (Japan wide band) */
/* 2: 76 - 90 MHz (Japan) */
-static int band = 1;
-module_param(band, int, 0);
+static unsigned short band = 1;
+module_param(band, ushort, 0);
MODULE_PARM_DESC(radio_nr, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
/* De-emphasis */
/* 0: 75 us (USA) */
/* 1: 50 us (Europe, Australia, Japan) */
-static int de = 1;
-module_param(de, int, 0);
+static unsigned short de = 1;
+module_param(de, ushort, 0);
MODULE_PARM_DESC(radio_nr, "De-emphasis: 0=75us *1=50us*");
/* USB timeout */
-static int usb_timeout = 500;
-module_param(usb_timeout, int, 0);
+static unsigned int usb_timeout = 500;
+module_param(usb_timeout, uint, 0);
MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
-/* Seek retries */
-static int seek_retries = 100;
-module_param(seek_retries, int, 0);
-MODULE_PARM_DESC(seek_retries, "Seek retries: *100*");
+/* Tune timeout */
+static unsigned int tune_timeout = 3000;
+module_param(tune_timeout, uint, 0);
+MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*");
/* RDS buffer blocks */
-static int rds_buf = 100;
-module_param(rds_buf, int, 0);
+static unsigned int rds_buf = 100;
+module_param(rds_buf, uint, 0);
MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
/* RDS maximum block errors */
-static int max_rds_errors = 1;
+static unsigned short max_rds_errors = 1;
/* 0 means 0 errors requiring correction */
/* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
/* 2 means 3-5 errors requiring correction */
/* 3 means 6+ errors or errors in checkword, correction not possible */
-module_param(max_rds_errors, int, 0);
+module_param(max_rds_errors, ushort, 0);
MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
/* RDS poll frequency */
-static int rds_poll_time = 40;
+static unsigned int rds_poll_time = 40;
/* 40 is used by the original USBRadio.exe */
/* 50 is used by radio-cadet */
/* 75 should be okay */
/* 80 is the usual RDS receive interval */
-module_param(rds_poll_time, int, 0);
+module_param(rds_poll_time, uint, 0);
MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
struct usb_device *usbdev;
struct video_device *videodev;
- /* are these really necessary ? */
- int users;
-
- /* report buffer (maximum 64 bytes) */
- unsigned char buf[64];
+ /* driver management */
+ unsigned int users;
/* Silabs internal registers (0..15) */
unsigned short registers[RADIO_REGISTER_NUM];
/*
* si470x_get_report - receive a HID report
*/
-static int si470x_get_report(struct si470x_device *radio, int size)
+static int si470x_get_report(struct si470x_device *radio, void *buf, int size)
{
- return usb_control_msg(radio->usbdev,
+ unsigned char *report = (unsigned char *) buf;
+ int retval;
+
+ retval = usb_control_msg(radio->usbdev,
usb_rcvctrlpipe(radio->usbdev, 0),
HID_REQ_GET_REPORT,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
- radio->buf[0], 2,
- radio->buf, size, usb_timeout);
+ report[0], 2,
+ buf, size, usb_timeout);
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": si470x_get_report: usb_control_msg returned %d\n",
+ retval);
+
+ return retval;
}
/*
* si470x_set_report - send a HID report
*/
-static int si470x_set_report(struct si470x_device *radio, int size)
+static int si470x_set_report(struct si470x_device *radio, void *buf, int size)
{
- return usb_control_msg(radio->usbdev,
+ unsigned char *report = (unsigned char *) buf;
+ int retval;
+
+ retval = usb_control_msg(radio->usbdev,
usb_sndctrlpipe(radio->usbdev, 0),
HID_REQ_SET_REPORT,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
- radio->buf[0], 2,
- radio->buf, size, usb_timeout);
+ report[0], 2,
+ buf, size, usb_timeout);
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": si470x_set_report: usb_control_msg returned %d\n",
+ retval);
+
+ return retval;
}
*/
static int si470x_get_register(struct si470x_device *radio, int regnr)
{
+ unsigned char buf[REGISTER_REPORT_SIZE];
int retval;
- radio->buf[0] = REGISTER_REPORT(regnr);
+ buf[0] = REGISTER_REPORT(regnr);
+
+ retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
- retval = si470x_get_report(radio, REGISTER_REPORT_SIZE);
if (retval >= 0)
- radio->registers[regnr] = (radio->buf[1] << 8) | radio->buf[2];
+ radio->registers[regnr] = (buf[1] << 8) | buf[2];
return (retval < 0) ? -EINVAL : 0;
}
*/
static int si470x_set_register(struct si470x_device *radio, int regnr)
{
+ unsigned char buf[REGISTER_REPORT_SIZE];
int retval;
- radio->buf[0] = REGISTER_REPORT(regnr);
- radio->buf[1] = (radio->registers[regnr] & 0xff00) >> 8;
- radio->buf[2] = (radio->registers[regnr] & 0x00ff);
+ buf[0] = REGISTER_REPORT(regnr);
+ buf[1] = (radio->registers[regnr] & 0xff00) >> 8;
+ buf[2] = (radio->registers[regnr] & 0x00ff);
- retval = si470x_set_report(radio, REGISTER_REPORT_SIZE);
+ retval = si470x_set_report(radio, (void *) &buf, sizeof(buf));
return (retval < 0) ? -EINVAL : 0;
}
*/
static int si470x_get_all_registers(struct si470x_device *radio)
{
+ unsigned char buf[ENTIRE_REPORT_SIZE];
int retval;
- int regnr;
+ unsigned char regnr;
- radio->buf[0] = ENTIRE_REPORT;
+ buf[0] = ENTIRE_REPORT;
- retval = si470x_get_report(radio, ENTIRE_REPORT_SIZE);
+ retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
if (retval >= 0)
for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++)
radio->registers[regnr] =
- (radio->buf[regnr * RADIO_REGISTER_SIZE + 1] << 8) |
- radio->buf[regnr * RADIO_REGISTER_SIZE + 2];
+ (buf[regnr * RADIO_REGISTER_SIZE + 1] << 8) |
+ buf[regnr * RADIO_REGISTER_SIZE + 2];
return (retval < 0) ? -EINVAL : 0;
}
*/
static int si470x_get_rds_registers(struct si470x_device *radio)
{
+ unsigned char buf[RDS_REPORT_SIZE];
int retval;
- int regnr;
int size;
+ unsigned char regnr;
- radio->buf[0] = RDS_REPORT;
+ buf[0] = RDS_REPORT;
retval = usb_interrupt_msg(radio->usbdev,
- usb_rcvctrlpipe(radio->usbdev, 1),
- radio->buf, RDS_REPORT_SIZE, &size, usb_timeout);
+ usb_rcvintpipe(radio->usbdev, 1),
+ (void *) &buf, sizeof(buf), &size, usb_timeout);
+ if (size != sizeof(buf))
+ printk(KERN_WARNING DRIVER_NAME ": si470x_get_rds_register: "
+ "return size differs: %d != %d\n", size, sizeof(buf));
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME ": si470x_get_rds_registers: "
+ "usb_interrupt_msg returned %d\n", retval);
if (retval >= 0)
for (regnr = 0; regnr < RDS_REGISTER_NUM; regnr++)
radio->registers[STATUSRSSI + regnr] =
- (radio->buf[regnr * RADIO_REGISTER_SIZE + 1] << 8) |
- radio->buf[regnr * RADIO_REGISTER_SIZE + 2];
+ (buf[regnr * RADIO_REGISTER_SIZE + 1] << 8) |
+ buf[regnr * RADIO_REGISTER_SIZE + 2];
return (retval < 0) ? -EINVAL : 0;
}
/*
* si470x_set_chan - set the channel
*/
-static int si470x_set_chan(struct si470x_device *radio, int chan)
+static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
{
- int retval, i;
+ int retval;
+ unsigned long timeout;
+ bool timed_out = 0;
/* start tuning */
radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
return retval;
/* wait till seek operation has completed */
- i = 0;
+ timeout = jiffies + msecs_to_jiffies(tune_timeout);
do {
retval = si470x_get_register(radio, STATUSRSSI);
if (retval < 0)
return retval;
- } while ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) &&
- (++i < seek_retries));
- if (i >= seek_retries)
+ timed_out = time_after(jiffies, timeout);
+ } while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
+ (!timed_out));
+ if (timed_out)
printk(KERN_WARNING DRIVER_NAME
- ": seek does not finish after %d tries\n", i);
+ ": seek does not finish after %d ms\n", tune_timeout);
/* stop tuning */
radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
/*
* si470x_get_freq - get the frequency
*/
-static int si470x_get_freq(struct si470x_device *radio)
+static unsigned int si470x_get_freq(struct si470x_device *radio)
{
- int spacing, band_bottom, chan, freq;
+ unsigned int spacing, band_bottom, freq;
+ unsigned short chan;
int retval;
/* Spacing (kHz) */
/*
* si470x_set_freq - set the frequency
*/
-static int si470x_set_freq(struct si470x_device *radio, int freq)
+static int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
{
- int spacing, band_bottom, chan;
+ unsigned int spacing, band_bottom;
+ unsigned short chan;
/* Spacing (kHz) */
switch (space) {
*/
static void si470x_rds(struct si470x_device *radio)
{
- unsigned char tmpbuf[3];
- unsigned char blocknum;
- unsigned char bler; /* rds block errors */
- unsigned short rds;
- unsigned int i;
-
/* get rds blocks */
if (si470x_get_rds_registers(radio) < 0)
return;
/* copy four RDS blocks to internal buffer */
if (spin_trylock(&radio->lock)) {
+ unsigned char blocknum;
+ unsigned short bler; /* rds block errors */
+ unsigned short rds;
+ unsigned char tmpbuf[3];
+ unsigned char i;
+
/* process each rds block */
for (blocknum = 0; blocknum < 4; blocknum++) {
switch (blocknum) {
{
struct si470x_device *radio = video_get_drvdata(video_devdata(file));
int retval = 0;
- unsigned int block_count = 0;
/* switch on rds reception */
if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) {
/* copy RDS block out of internal buffer and to user buffer */
if (spin_trylock(&radio->lock)) {
+ unsigned int block_count = 0;
while (block_count < count) {
if (radio->rd_index == radio->wr_index)
break;
strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
sprintf(capability->bus_info, "USB");
- capability->version = DRIVER_VERSION;
+ capability->version = DRIVER_KERNEL_VERSION;
capability->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
return 0;
static int si470x_vidioc_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
- int i;
+ unsigned char i;
+ int retval = -EINVAL;
for (i = 0; i < ARRAY_SIZE(si470x_v4l2_queryctrl); i++) {
if (qc->id && qc->id == si470x_v4l2_queryctrl[i].id) {
memcpy(qc, &(si470x_v4l2_queryctrl[i]), sizeof(*qc));
- return 0;
+ retval = 0;
+ break;
}
}
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": query control failed with %d\n", retval);
- return -EINVAL;
+ return retval;
}
struct v4l2_control *ctrl)
{
struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+ int retval;
switch (ctrl->id) {
case V4L2_CID_AUDIO_VOLUME:
radio->registers[SYSCONFIG2] &= ~SYSCONFIG2_VOLUME;
radio->registers[SYSCONFIG2] |= ctrl->value;
- return si470x_set_register(radio, SYSCONFIG2);
+ retval = si470x_set_register(radio, SYSCONFIG2);
+ break;
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value == 1)
radio->registers[POWERCFG] &= ~POWERCFG_DMUTE;
else
radio->registers[POWERCFG] |= POWERCFG_DMUTE;
- return si470x_set_register(radio, POWERCFG);
+ retval = si470x_set_register(radio, POWERCFG);
+ break;
+ default:
+ retval = -EINVAL;
}
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": set control failed with %d\n", retval);
- return -EINVAL;
+ return retval;
}
static int si470x_vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *tuner)
{
- int retval;
struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+ int retval;
if (tuner->index > 0)
return -EINVAL;
struct v4l2_tuner *tuner)
{
struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+ int retval;
if (tuner->index > 0)
return -EINVAL;
else
radio->registers[POWERCFG] &= ~POWERCFG_MONO; /* try stereo */
- return si470x_set_register(radio, POWERCFG);
+ retval = si470x_set_register(radio, POWERCFG);
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": set tuner failed with %d\n", retval);
+
+ return retval;
}
struct v4l2_frequency *freq)
{
struct si470x_device *radio = video_get_drvdata(video_devdata(file));
+ int retval;
if (freq->type != V4L2_TUNER_RADIO)
return -EINVAL;
- return si470x_set_freq(radio, freq->frequency);
+ retval = si470x_set_freq(radio, freq->frequency);
+ if (retval < 0)
+ printk(KERN_WARNING DRIVER_NAME
+ ": set frequency failed with %d\n", retval);
+
+ return 0;
}
*/
static int __init si470x_module_init(void)
{
- printk(KERN_INFO DRIVER_DESC "\n");
+ printk(KERN_INFO DRIVER_DESC ", Version " DRIVER_VERSION "\n");
return usb_register(&si470x_usb_driver);
}
MODULE_LICENSE("GPL");
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_VERSION("1.0.4");
+MODULE_VERSION(DRIVER_VERSION);
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