![Alexey Klimov](/assets/img/avatar_default.png)
Patch removes empty open and release functions in pci and isa radio drivers, setting them to NULL. V4L module doesn't call for them due to previous patch. Signed-off-by: Alexey Klimov <klimov.linux@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
463 lines
11 KiB
C
463 lines
11 KiB
C
/*
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* Guillemot Maxi Radio FM 2000 PCI radio card driver for Linux
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* (C) 2001 Dimitromanolakis Apostolos <apdim@grecian.net>
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*
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* Based in the radio Maestro PCI driver. Actually it uses the same chip
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* for radio but different pci controller.
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*
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* I didn't have any specs I reversed engineered the protocol from
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* the windows driver (radio.dll).
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*
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* The card uses the TEA5757 chip that includes a search function but it
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* is useless as I haven't found any way to read back the frequency. If
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* anybody does please mail me.
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*
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* For the pdf file see:
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* http://www.semiconductors.philips.com/pip/TEA5757H/V1
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*
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*
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* CHANGES:
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* 0.75b
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* - better pci interface thanks to Francois Romieu <romieu@cogenit.fr>
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*
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* 0.75 Sun Feb 4 22:51:27 EET 2001
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* - tiding up
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* - removed support for multiple devices as it didn't work anyway
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*
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* BUGS:
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* - card unmutes if you change frequency
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*
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* (c) 2006, 2007 by Mauro Carvalho Chehab <mchehab@infradead.org>:
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* - Conversion to V4L2 API
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* - Uses video_ioctl2 for parsing and to add debug support
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/pci.h>
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#include <linux/videodev2.h>
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#include <linux/version.h> /* for KERNEL_VERSION MACRO */
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#include <linux/io.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
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MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
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MODULE_LICENSE("GPL");
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static int radio_nr = -1;
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module_param(radio_nr, int, 0);
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "activates debug info");
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#define DRIVER_VERSION "0.77"
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#define RADIO_VERSION KERNEL_VERSION(0, 7, 7)
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#define dprintk(dev, num, fmt, arg...) \
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v4l2_dbg(num, debug, &dev->v4l2_dev, fmt, ## arg)
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#ifndef PCI_VENDOR_ID_GUILLEMOT
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#define PCI_VENDOR_ID_GUILLEMOT 0x5046
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#endif
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#ifndef PCI_DEVICE_ID_GUILLEMOT
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#define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
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#endif
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/* TEA5757 pin mappings */
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static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16;
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#define FREQ_LO (50 * 16000)
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#define FREQ_HI (150 * 16000)
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#define FREQ_IF 171200 /* 10.7*16000 */
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#define FREQ_STEP 200 /* 12.5*16 */
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/* (x==fmhz*16*1000) -> bits */
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#define FREQ2BITS(x) \
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((((unsigned int)(x) + FREQ_IF + (FREQ_STEP << 1)) / (FREQ_STEP << 2)) << 2)
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#define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
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struct maxiradio
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{
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struct v4l2_device v4l2_dev;
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struct video_device vdev;
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struct pci_dev *pdev;
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u16 io; /* base of radio io */
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u16 muted; /* VIDEO_AUDIO_MUTE */
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u16 stereo; /* VIDEO_TUNER_STEREO_ON */
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u16 tuned; /* signal strength (0 or 0xffff) */
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unsigned long freq;
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struct mutex lock;
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};
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static inline struct maxiradio *to_maxiradio(struct v4l2_device *v4l2_dev)
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{
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return container_of(v4l2_dev, struct maxiradio, v4l2_dev);
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}
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static void outbit(unsigned long bit, u16 io)
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{
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int val = power | wren | (bit ? data : 0);
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outb(val, io);
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udelay(4);
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outb(val | clk, io);
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udelay(4);
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outb(val, io);
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udelay(4);
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}
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static void turn_power(struct maxiradio *dev, int p)
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{
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if (p != 0) {
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dprintk(dev, 1, "Radio powered on\n");
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outb(power, dev->io);
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} else {
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dprintk(dev, 1, "Radio powered off\n");
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outb(0, dev->io);
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}
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}
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static void set_freq(struct maxiradio *dev, u32 freq)
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{
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unsigned long int si;
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int bl;
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int io = dev->io;
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int val = FREQ2BITS(freq);
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/* TEA5757 shift register bits (see pdf) */
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outbit(0, io); /* 24 search */
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outbit(1, io); /* 23 search up/down */
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outbit(0, io); /* 22 stereo/mono */
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outbit(0, io); /* 21 band */
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outbit(0, io); /* 20 band (only 00=FM works I think) */
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outbit(0, io); /* 19 port ? */
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outbit(0, io); /* 18 port ? */
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outbit(0, io); /* 17 search level */
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outbit(0, io); /* 16 search level */
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si = 0x8000;
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for (bl = 1; bl <= 16; bl++) {
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outbit(val & si, io);
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si >>= 1;
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}
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dprintk(dev, 1, "Radio freq set to %d.%02d MHz\n",
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freq / 16000,
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freq % 16000 * 100 / 16000);
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turn_power(dev, 1);
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}
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static int get_stereo(u16 io)
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{
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outb(power,io);
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udelay(4);
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return !(inb(io) & mo_st);
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}
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static int get_tune(u16 io)
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{
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outb(power+clk,io);
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udelay(4);
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return !(inb(io) & mo_st);
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}
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static int vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *v)
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{
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struct maxiradio *dev = video_drvdata(file);
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strlcpy(v->driver, "radio-maxiradio", sizeof(v->driver));
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strlcpy(v->card, "Maxi Radio FM2000 radio", sizeof(v->card));
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snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(dev->pdev));
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v->version = RADIO_VERSION;
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v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
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return 0;
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}
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static int vidioc_g_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct maxiradio *dev = video_drvdata(file);
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if (v->index > 0)
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return -EINVAL;
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mutex_lock(&dev->lock);
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strlcpy(v->name, "FM", sizeof(v->name));
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v->type = V4L2_TUNER_RADIO;
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v->rangelow = FREQ_LO;
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v->rangehigh = FREQ_HI;
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v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
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v->capability = V4L2_TUNER_CAP_LOW;
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if (get_stereo(dev->io))
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v->audmode = V4L2_TUNER_MODE_STEREO;
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else
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v->audmode = V4L2_TUNER_MODE_MONO;
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v->signal = 0xffff * get_tune(dev->io);
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mutex_unlock(&dev->lock);
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return 0;
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}
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static int vidioc_s_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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return v->index ? -EINVAL : 0;
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}
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static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
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{
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*i = 0;
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return 0;
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}
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static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
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{
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return i ? -EINVAL : 0;
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}
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static int vidioc_g_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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a->index = 0;
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strlcpy(a->name, "Radio", sizeof(a->name));
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a->capability = V4L2_AUDCAP_STEREO;
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return 0;
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}
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static int vidioc_s_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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return a->index ? -EINVAL : 0;
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}
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static int vidioc_s_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct maxiradio *dev = video_drvdata(file);
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if (f->frequency < FREQ_LO || f->frequency > FREQ_HI) {
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dprintk(dev, 1, "radio freq (%d.%02d MHz) out of range (%d-%d)\n",
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f->frequency / 16000,
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f->frequency % 16000 * 100 / 16000,
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FREQ_LO / 16000, FREQ_HI / 16000);
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return -EINVAL;
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}
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mutex_lock(&dev->lock);
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dev->freq = f->frequency;
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set_freq(dev, dev->freq);
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msleep(125);
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mutex_unlock(&dev->lock);
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return 0;
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}
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static int vidioc_g_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct maxiradio *dev = video_drvdata(file);
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f->type = V4L2_TUNER_RADIO;
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f->frequency = dev->freq;
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dprintk(dev, 4, "radio freq is %d.%02d MHz",
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f->frequency / 16000,
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f->frequency % 16000 * 100 / 16000);
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return 0;
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}
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static int vidioc_queryctrl(struct file *file, void *priv,
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struct v4l2_queryctrl *qc)
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{
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switch (qc->id) {
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case V4L2_CID_AUDIO_MUTE:
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return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
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}
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return -EINVAL;
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}
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static int vidioc_g_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct maxiradio *dev = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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ctrl->value = dev->muted;
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return 0;
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}
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return -EINVAL;
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}
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static int vidioc_s_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct maxiradio *dev = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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mutex_lock(&dev->lock);
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dev->muted = ctrl->value;
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if (dev->muted)
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turn_power(dev, 0);
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else
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set_freq(dev, dev->freq);
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mutex_unlock(&dev->lock);
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return 0;
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}
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return -EINVAL;
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}
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static const struct v4l2_file_operations maxiradio_fops = {
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.owner = THIS_MODULE,
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.ioctl = video_ioctl2,
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};
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static const struct v4l2_ioctl_ops maxiradio_ioctl_ops = {
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.vidioc_querycap = vidioc_querycap,
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.vidioc_g_tuner = vidioc_g_tuner,
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.vidioc_s_tuner = vidioc_s_tuner,
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.vidioc_g_audio = vidioc_g_audio,
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.vidioc_s_audio = vidioc_s_audio,
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.vidioc_g_input = vidioc_g_input,
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.vidioc_s_input = vidioc_s_input,
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.vidioc_g_frequency = vidioc_g_frequency,
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.vidioc_s_frequency = vidioc_s_frequency,
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.vidioc_queryctrl = vidioc_queryctrl,
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.vidioc_g_ctrl = vidioc_g_ctrl,
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.vidioc_s_ctrl = vidioc_s_ctrl,
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};
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static int __devinit maxiradio_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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struct maxiradio *dev;
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struct v4l2_device *v4l2_dev;
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int retval = -ENOMEM;
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (dev == NULL) {
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dev_err(&pdev->dev, "not enough memory\n");
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return -ENOMEM;
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}
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v4l2_dev = &dev->v4l2_dev;
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mutex_init(&dev->lock);
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dev->pdev = pdev;
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dev->muted = 1;
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dev->freq = FREQ_LO;
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strlcpy(v4l2_dev->name, "maxiradio", sizeof(v4l2_dev->name));
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retval = v4l2_device_register(&pdev->dev, v4l2_dev);
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if (retval < 0) {
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v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
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goto errfr;
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}
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if (!request_region(pci_resource_start(pdev, 0),
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pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) {
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v4l2_err(v4l2_dev, "can't reserve I/O ports\n");
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goto err_out;
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}
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if (pci_enable_device(pdev))
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goto err_out_free_region;
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dev->io = pci_resource_start(pdev, 0);
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strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
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dev->vdev.v4l2_dev = v4l2_dev;
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dev->vdev.fops = &maxiradio_fops;
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dev->vdev.ioctl_ops = &maxiradio_ioctl_ops;
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dev->vdev.release = video_device_release_empty;
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video_set_drvdata(&dev->vdev, dev);
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if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
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v4l2_err(v4l2_dev, "can't register device!");
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goto err_out_free_region;
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}
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v4l2_info(v4l2_dev, "version " DRIVER_VERSION
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" time " __TIME__ " " __DATE__ "\n");
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v4l2_info(v4l2_dev, "found Guillemot MAXI Radio device (io = 0x%x)\n",
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dev->io);
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return 0;
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err_out_free_region:
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release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
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err_out:
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v4l2_device_unregister(v4l2_dev);
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errfr:
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kfree(dev);
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return -ENODEV;
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}
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static void __devexit maxiradio_remove_one(struct pci_dev *pdev)
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{
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struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
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struct maxiradio *dev = to_maxiradio(v4l2_dev);
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video_unregister_device(&dev->vdev);
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v4l2_device_unregister(&dev->v4l2_dev);
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release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
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}
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static struct pci_device_id maxiradio_pci_tbl[] = {
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{ PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
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PCI_ANY_ID, PCI_ANY_ID, },
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{ 0 }
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};
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MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);
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static struct pci_driver maxiradio_driver = {
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.name = "radio-maxiradio",
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.id_table = maxiradio_pci_tbl,
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.probe = maxiradio_init_one,
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.remove = __devexit_p(maxiradio_remove_one),
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};
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static int __init maxiradio_radio_init(void)
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{
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return pci_register_driver(&maxiradio_driver);
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}
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static void __exit maxiradio_radio_exit(void)
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{
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pci_unregister_driver(&maxiradio_driver);
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}
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module_init(maxiradio_radio_init);
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module_exit(maxiradio_radio_exit);
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