mirror of https://gitee.com/openkylin/linux.git
V4L/DVB (7091): radio-si470x improvements and seldom problem fixed in tuning functions
I updated the radio-si470x driver another time. Here are the commented history entries: - number of seek_retries changed to tune_timeout The last versions checked for the end of frequency tuning by polling a si470x register. Therefore polling depended on the usb utilization. This was changed to have a constant timeout now. - fixed problem with incomplete tune operations by own buffers The last version used a shared buffer to assembly the USB HID reports. It sometimes happened, that multiple functions were modifing this buffer simultanuously. When sending such reports, the hardware returned USB stalls (-EPIPE). Now buffers of the correct size (smaller than before) are allocated as local variables. - optimization of variables The size of some variables has been reduced to allow the compiler to generate more optimized code. - improved error logging At some important location, error checking was improved. Especially the usb transfers to access si470x registers and the tuning functions were modified. Signed-off-by: Tobias Lorenz <tobias.lorenz@gmx.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Tobias Lorenz
Mauro Carvalho Chehab
parent
2de3a5a5c5
commit
0e3301ec23
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@ -62,6 +62,12 @@
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* - code cleaned of unnecessary rds_commands
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* - USB Vendor/Product ID for ADS/Tech FM Radio Receiver verified
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* (thanks to Guillaume RAMOUSSE)
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* 2008-01-27 Tobias Lorenz <tobias.lorenz@gmx.net>
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* Version 1.0.5
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* - number of seek_retries changed to tune_timeout
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* - fixed problem with incomplete tune operations by own buffers
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* - optimization of variables
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* - improved error logging
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*
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* ToDo:
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* - add seeking support
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@ -74,9 +80,10 @@
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/* driver definitions */
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#define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>"
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#define DRIVER_NAME "radio-si470x"
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#define DRIVER_VERSION KERNEL_VERSION(1, 0, 4)
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#define DRIVER_KERNEL_VERSION KERNEL_VERSION(1, 0, 5)
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#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
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#define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers"
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#define DRIVER_VERSION "1.0.5"
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/* kernel includes */
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@ -119,56 +126,56 @@ MODULE_PARM_DESC(radio_nr, "Radio Nr");
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/* 0: 200 kHz (USA, Australia) */
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/* 1: 100 kHz (Europe, Japan) */
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/* 2: 50 kHz */
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static int space = 2;
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module_param(space, int, 0);
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static unsigned short space = 2;
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module_param(space, ushort, 0);
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MODULE_PARM_DESC(radio_nr, "Spacing: 0=200kHz 1=100kHz *2=50kHz*");
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/* Bottom of Band (MHz) */
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/* 0: 87.5 - 108 MHz (USA, Europe)*/
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/* 1: 76 - 108 MHz (Japan wide band) */
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/* 2: 76 - 90 MHz (Japan) */
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static int band = 1;
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module_param(band, int, 0);
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static unsigned short band = 1;
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module_param(band, ushort, 0);
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MODULE_PARM_DESC(radio_nr, "Band: 0=87.5..108MHz *1=76..108MHz* 2=76..90MHz");
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/* De-emphasis */
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/* 0: 75 us (USA) */
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/* 1: 50 us (Europe, Australia, Japan) */
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static int de = 1;
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module_param(de, int, 0);
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static unsigned short de = 1;
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module_param(de, ushort, 0);
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MODULE_PARM_DESC(radio_nr, "De-emphasis: 0=75us *1=50us*");
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/* USB timeout */
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static int usb_timeout = 500;
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module_param(usb_timeout, int, 0);
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static unsigned int usb_timeout = 500;
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module_param(usb_timeout, uint, 0);
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MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*");
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/* Seek retries */
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static int seek_retries = 100;
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module_param(seek_retries, int, 0);
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MODULE_PARM_DESC(seek_retries, "Seek retries: *100*");
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/* Tune timeout */
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static unsigned int tune_timeout = 3000;
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module_param(tune_timeout, uint, 0);
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MODULE_PARM_DESC(tune_timeout, "Tune timeout: *3000*");
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/* RDS buffer blocks */
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static int rds_buf = 100;
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module_param(rds_buf, int, 0);
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static unsigned int rds_buf = 100;
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module_param(rds_buf, uint, 0);
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MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*");
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/* RDS maximum block errors */
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static int max_rds_errors = 1;
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static unsigned short max_rds_errors = 1;
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/* 0 means 0 errors requiring correction */
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/* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */
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/* 2 means 3-5 errors requiring correction */
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/* 3 means 6+ errors or errors in checkword, correction not possible */
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module_param(max_rds_errors, int, 0);
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module_param(max_rds_errors, ushort, 0);
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MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*");
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/* RDS poll frequency */
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static int rds_poll_time = 40;
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static unsigned int rds_poll_time = 40;
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/* 40 is used by the original USBRadio.exe */
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/* 50 is used by radio-cadet */
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/* 75 should be okay */
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/* 80 is the usual RDS receive interval */
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module_param(rds_poll_time, int, 0);
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module_param(rds_poll_time, uint, 0);
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MODULE_PARM_DESC(rds_poll_time, "RDS poll time (ms): *40*");
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@ -395,11 +402,8 @@ struct si470x_device {
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struct usb_device *usbdev;
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struct video_device *videodev;
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/* are these really necessary ? */
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int users;
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/* report buffer (maximum 64 bytes) */
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unsigned char buf[64];
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/* driver management */
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unsigned int users;
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/* Silabs internal registers (0..15) */
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unsigned short registers[RADIO_REGISTER_NUM];
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@ -434,28 +438,46 @@ struct si470x_device {
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/*
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* si470x_get_report - receive a HID report
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*/
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static int si470x_get_report(struct si470x_device *radio, int size)
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static int si470x_get_report(struct si470x_device *radio, void *buf, int size)
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{
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return usb_control_msg(radio->usbdev,
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unsigned char *report = (unsigned char *) buf;
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int retval;
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retval = usb_control_msg(radio->usbdev,
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usb_rcvctrlpipe(radio->usbdev, 0),
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HID_REQ_GET_REPORT,
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
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radio->buf[0], 2,
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radio->buf, size, usb_timeout);
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report[0], 2,
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buf, size, usb_timeout);
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if (retval < 0)
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printk(KERN_WARNING DRIVER_NAME
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": si470x_get_report: usb_control_msg returned %d\n",
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retval);
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return retval;
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}
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/*
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* si470x_set_report - send a HID report
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*/
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static int si470x_set_report(struct si470x_device *radio, int size)
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static int si470x_set_report(struct si470x_device *radio, void *buf, int size)
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{
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return usb_control_msg(radio->usbdev,
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unsigned char *report = (unsigned char *) buf;
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int retval;
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retval = usb_control_msg(radio->usbdev,
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usb_sndctrlpipe(radio->usbdev, 0),
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HID_REQ_SET_REPORT,
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT,
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radio->buf[0], 2,
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radio->buf, size, usb_timeout);
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report[0], 2,
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buf, size, usb_timeout);
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if (retval < 0)
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printk(KERN_WARNING DRIVER_NAME
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": si470x_set_report: usb_control_msg returned %d\n",
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retval);
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return retval;
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}
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@ -464,13 +486,15 @@ static int si470x_set_report(struct si470x_device *radio, int size)
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*/
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static int si470x_get_register(struct si470x_device *radio, int regnr)
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{
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unsigned char buf[REGISTER_REPORT_SIZE];
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int retval;
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radio->buf[0] = REGISTER_REPORT(regnr);
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buf[0] = REGISTER_REPORT(regnr);
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retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
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retval = si470x_get_report(radio, REGISTER_REPORT_SIZE);
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if (retval >= 0)
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radio->registers[regnr] = (radio->buf[1] << 8) | radio->buf[2];
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radio->registers[regnr] = (buf[1] << 8) | buf[2];
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return (retval < 0) ? -EINVAL : 0;
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}
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@ -481,13 +505,14 @@ static int si470x_get_register(struct si470x_device *radio, int regnr)
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*/
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static int si470x_set_register(struct si470x_device *radio, int regnr)
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{
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unsigned char buf[REGISTER_REPORT_SIZE];
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int retval;
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radio->buf[0] = REGISTER_REPORT(regnr);
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radio->buf[1] = (radio->registers[regnr] & 0xff00) >> 8;
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radio->buf[2] = (radio->registers[regnr] & 0x00ff);
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buf[0] = REGISTER_REPORT(regnr);
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buf[1] = (radio->registers[regnr] & 0xff00) >> 8;
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buf[2] = (radio->registers[regnr] & 0x00ff);
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retval = si470x_set_report(radio, REGISTER_REPORT_SIZE);
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retval = si470x_set_report(radio, (void *) &buf, sizeof(buf));
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return (retval < 0) ? -EINVAL : 0;
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}
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@ -498,18 +523,19 @@ static int si470x_set_register(struct si470x_device *radio, int regnr)
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*/
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static int si470x_get_all_registers(struct si470x_device *radio)
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{
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unsigned char buf[ENTIRE_REPORT_SIZE];
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int retval;
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int regnr;
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unsigned char regnr;
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radio->buf[0] = ENTIRE_REPORT;
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buf[0] = ENTIRE_REPORT;
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retval = si470x_get_report(radio, ENTIRE_REPORT_SIZE);
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retval = si470x_get_report(radio, (void *) &buf, sizeof(buf));
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if (retval >= 0)
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for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++)
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radio->registers[regnr] =
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(radio->buf[regnr * RADIO_REGISTER_SIZE + 1] << 8) |
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radio->buf[regnr * RADIO_REGISTER_SIZE + 2];
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(buf[regnr * RADIO_REGISTER_SIZE + 1] << 8) |
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buf[regnr * RADIO_REGISTER_SIZE + 2];
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return (retval < 0) ? -EINVAL : 0;
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}
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@ -520,21 +546,28 @@ static int si470x_get_all_registers(struct si470x_device *radio)
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*/
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static int si470x_get_rds_registers(struct si470x_device *radio)
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{
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unsigned char buf[RDS_REPORT_SIZE];
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int retval;
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int regnr;
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int size;
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unsigned char regnr;
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radio->buf[0] = RDS_REPORT;
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buf[0] = RDS_REPORT;
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retval = usb_interrupt_msg(radio->usbdev,
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usb_rcvctrlpipe(radio->usbdev, 1),
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radio->buf, RDS_REPORT_SIZE, &size, usb_timeout);
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usb_rcvintpipe(radio->usbdev, 1),
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(void *) &buf, sizeof(buf), &size, usb_timeout);
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if (size != sizeof(buf))
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printk(KERN_WARNING DRIVER_NAME ": si470x_get_rds_register: "
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"return size differs: %d != %d\n", size, sizeof(buf));
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if (retval < 0)
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printk(KERN_WARNING DRIVER_NAME ": si470x_get_rds_registers: "
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"usb_interrupt_msg returned %d\n", retval);
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if (retval >= 0)
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for (regnr = 0; regnr < RDS_REGISTER_NUM; regnr++)
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radio->registers[STATUSRSSI + regnr] =
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(radio->buf[regnr * RADIO_REGISTER_SIZE + 1] << 8) |
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radio->buf[regnr * RADIO_REGISTER_SIZE + 2];
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(buf[regnr * RADIO_REGISTER_SIZE + 1] << 8) |
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buf[regnr * RADIO_REGISTER_SIZE + 2];
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return (retval < 0) ? -EINVAL : 0;
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}
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@ -543,9 +576,11 @@ static int si470x_get_rds_registers(struct si470x_device *radio)
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/*
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* si470x_set_chan - set the channel
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*/
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static int si470x_set_chan(struct si470x_device *radio, int chan)
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static int si470x_set_chan(struct si470x_device *radio, unsigned short chan)
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{
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int retval, i;
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int retval;
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unsigned long timeout;
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bool timed_out = 0;
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/* start tuning */
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radio->registers[CHANNEL] &= ~CHANNEL_CHAN;
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@ -555,16 +590,17 @@ static int si470x_set_chan(struct si470x_device *radio, int chan)
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return retval;
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/* wait till seek operation has completed */
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i = 0;
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timeout = jiffies + msecs_to_jiffies(tune_timeout);
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do {
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retval = si470x_get_register(radio, STATUSRSSI);
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if (retval < 0)
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return retval;
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} while ((radio->registers[STATUSRSSI] & STATUSRSSI_STC) &&
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(++i < seek_retries));
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if (i >= seek_retries)
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timed_out = time_after(jiffies, timeout);
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} while (((radio->registers[STATUSRSSI] & STATUSRSSI_STC) == 0) &&
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(!timed_out));
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if (timed_out)
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printk(KERN_WARNING DRIVER_NAME
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": seek does not finish after %d tries\n", i);
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": seek does not finish after %d ms\n", tune_timeout);
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/* stop tuning */
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radio->registers[CHANNEL] &= ~CHANNEL_TUNE;
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@ -575,9 +611,10 @@ static int si470x_set_chan(struct si470x_device *radio, int chan)
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/*
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* si470x_get_freq - get the frequency
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*/
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static int si470x_get_freq(struct si470x_device *radio)
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static unsigned int si470x_get_freq(struct si470x_device *radio)
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{
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int spacing, band_bottom, chan, freq;
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unsigned int spacing, band_bottom, freq;
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unsigned short chan;
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int retval;
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/* Spacing (kHz) */
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@ -616,9 +653,10 @@ static int si470x_get_freq(struct si470x_device *radio)
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/*
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* si470x_set_freq - set the frequency
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*/
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static int si470x_set_freq(struct si470x_device *radio, int freq)
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static int si470x_set_freq(struct si470x_device *radio, unsigned int freq)
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{
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int spacing, band_bottom, chan;
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unsigned int spacing, band_bottom;
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unsigned short chan;
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/* Spacing (kHz) */
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switch (space) {
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@ -725,12 +763,6 @@ static int si470x_rds_on(struct si470x_device *radio)
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*/
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static void si470x_rds(struct si470x_device *radio)
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{
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unsigned char tmpbuf[3];
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unsigned char blocknum;
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unsigned char bler; /* rds block errors */
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unsigned short rds;
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unsigned int i;
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/* get rds blocks */
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if (si470x_get_rds_registers(radio) < 0)
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return;
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@ -745,6 +777,12 @@ static void si470x_rds(struct si470x_device *radio)
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/* copy four RDS blocks to internal buffer */
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if (spin_trylock(&radio->lock)) {
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unsigned char blocknum;
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unsigned short bler; /* rds block errors */
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unsigned short rds;
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unsigned char tmpbuf[3];
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unsigned char i;
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/* process each rds block */
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for (blocknum = 0; blocknum < 4; blocknum++) {
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switch (blocknum) {
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@ -847,7 +885,6 @@ static ssize_t si470x_fops_read(struct file *file, char __user *buf,
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{
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struct si470x_device *radio = video_get_drvdata(video_devdata(file));
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int retval = 0;
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unsigned int block_count = 0;
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/* switch on rds reception */
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if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) {
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@ -867,6 +904,7 @@ static ssize_t si470x_fops_read(struct file *file, char __user *buf,
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/* copy RDS block out of internal buffer and to user buffer */
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if (spin_trylock(&radio->lock)) {
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unsigned int block_count = 0;
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while (block_count < count) {
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if (radio->rd_index == radio->wr_index)
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break;
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@ -1030,7 +1068,7 @@ static int si470x_vidioc_querycap(struct file *file, void *priv,
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strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
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strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card));
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sprintf(capability->bus_info, "USB");
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capability->version = DRIVER_VERSION;
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capability->version = DRIVER_KERNEL_VERSION;
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capability->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
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return 0;
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@ -1067,16 +1105,21 @@ static int si470x_vidioc_s_input(struct file *filp, void *priv, unsigned int i)
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static int si470x_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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unsigned char i;
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int retval = -EINVAL;
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for (i = 0; i < ARRAY_SIZE(si470x_v4l2_queryctrl); i++) {
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if (qc->id && qc->id == si470x_v4l2_queryctrl[i].id) {
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memcpy(qc, &(si470x_v4l2_queryctrl[i]), sizeof(*qc));
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return 0;
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retval = 0;
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break;
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}
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}
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if (retval < 0)
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printk(KERN_WARNING DRIVER_NAME
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": query control failed with %d\n", retval);
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return -EINVAL;
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -1110,21 +1153,29 @@ static int si470x_vidioc_s_ctrl(struct file *file, void *priv,
|
|||
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;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -1163,8 +1214,8 @@ static int si470x_vidioc_s_audio(struct file *file, void *priv,
|
|||
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;
|
||||
|
|
@ -1220,6 +1271,7 @@ static int si470x_vidioc_s_tuner(struct file *file, void *priv,
|
|||
struct v4l2_tuner *tuner)
|
||||
{
|
||||
struct si470x_device *radio = video_get_drvdata(video_devdata(file));
|
||||
int retval;
|
||||
|
||||
if (tuner->index > 0)
|
||||
return -EINVAL;
|
||||
|
|
@ -1229,7 +1281,12 @@ static int si470x_vidioc_s_tuner(struct file *file, void *priv,
|
|||
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;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -1255,11 +1312,17 @@ static int si470x_vidioc_s_frequency(struct file *file, void *priv,
|
|||
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;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -1409,7 +1472,7 @@ static struct usb_driver si470x_usb_driver = {
|
|||
*/
|
||||
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);
|
||||
}
|
||||
|
||||
|
|
@ -1429,4 +1492,4 @@ module_exit(si470x_module_exit);
|
|||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR(DRIVER_AUTHOR);
|
||||
MODULE_DESCRIPTION(DRIVER_DESC);
|
||||
MODULE_VERSION("1.0.4");
|
||||
MODULE_VERSION(DRIVER_VERSION);
|
||||
|
|
|
|||
Loading…
Reference in New Issue